WO2021196847A1 - 一种便携式儿童游戏床 - Google Patents

一种便携式儿童游戏床 Download PDF

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Publication number
WO2021196847A1
WO2021196847A1 PCT/CN2021/073970 CN2021073970W WO2021196847A1 WO 2021196847 A1 WO2021196847 A1 WO 2021196847A1 CN 2021073970 W CN2021073970 W CN 2021073970W WO 2021196847 A1 WO2021196847 A1 WO 2021196847A1
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WO
WIPO (PCT)
Prior art keywords
rod
positioning
folding
bed
inner cavity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/073970
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English (en)
French (fr)
Inventor
茅鸿勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Coolbaby Science & Technology Development Corp
Original Assignee
Anhui Coolbaby Science & Technology Development Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anhui Coolbaby Science & Technology Development Corp filed Critical Anhui Coolbaby Science & Technology Development Corp
Priority to US17/638,662 priority Critical patent/US12102240B2/en
Priority to EP21780103.4A priority patent/EP3991613B1/en
Publication of WO2021196847A1 publication Critical patent/WO2021196847A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47D—FURNITURE SPECIALLY ADAPTED FOR CHILDREN
    • A47D13/00—Other nursery furniture
    • A47D13/06—Children's play- pens
    • A47D13/061—Children's play- pens foldable
    • A47D13/063—Children's play- pens foldable with soft walls
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47D—FURNITURE SPECIALLY ADAPTED FOR CHILDREN
    • A47D13/00—Other nursery furniture
    • A47D13/06—Children's play- pens
    • A47D13/061—Children's play- pens foldable
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47D—FURNITURE SPECIALLY ADAPTED FOR CHILDREN
    • A47D15/00—Accessories for children's furniture, e.g. safety belts or baby-bottle holders
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47D—FURNITURE SPECIALLY ADAPTED FOR CHILDREN
    • A47D7/00—Children's beds
    • A47D7/002—Children's beds foldable

Definitions

  • the invention relates to the technical field of making children's play beds, in particular to a portable children's play bed.
  • An existing Chinese invention patent application with the application number CN201310306550.1 titled “A Children’s Entertainment Bed” discloses a structure which includes four outriggers and a central control device at the bottom.
  • An upper connecting rod and a lower connecting rod are hinged on the inner side of the lower part, an upper support beam is hinged between the upper ends of the two adjacent legs, and a cross beam folding joint is provided in the middle of the upper support beam.
  • An upper folding mechanism is provided between the upper support beam and the outer end of the upper connecting rod and the lower connecting rod.
  • the inner end of the upper connecting rod and the lower connecting rod is connected to the
  • the bottom central control device is connected and driven by the bottom central control device to be folded and unfolded, and the cross beam folding joint, the lower folding mechanism, and the upper folding mechanism are all driven by the upper link and the lower link to fold and unfold.
  • the purpose of the present invention is to overcome the shortcomings of the prior art and provide a children's amusement bed with good stability and convenient folding and unfolding operations.
  • the disadvantage of this structure is that the children's amusement bed needs to be provided with a total of 24 pull ropes, including an unfolding pull rope, a folding pull rope and a beam pull rope, and the manufacturing process is too complicated.
  • the technical problem to be solved by the present invention is to provide a portable children's play bed with ingenious structure, firm structure, flexible and convenient use and low production cost in view of the above-mentioned current state of the art.
  • the portable children’s play bed includes four bed legs and a folding drive device placed in the middle of the bed bottom that can fold and unfold the bed body.
  • the tops are respectively provided with guard rods that can be folded in the middle, and the two ends of the guard rods are respectively movably connected to the top of the corresponding bed leg, and the bottom of each bed leg is provided with a connecting mechanism that is movably connected to the folding drive device through a connecting rod
  • the connecting rod is composed of an upper connecting rod and a lower connecting rod arranged up and down, and is characterized in that: the connecting mechanism includes a base, a transmission mechanism arranged in the inner cavity of the base, and one end of the upper connecting rod extends into the base
  • the upper inner cavity is rotatably connected with the base by an upper shaft pin, the other end of the upper connecting rod is connected by the upper rotating shaft pin to the frame body in the folding drive device, and one end of the lower connecting rod extends Into the lower cavity of the base, the lower shaft pin
  • the transmission mechanism is a swing block which is swingably arranged in the lower cavity of the base through a swing shaft, and the lower shaft pin is arranged in the inner cavity of the base at the upper right position of the swing block.
  • the swing block is provided with a drive roller that can be in contact with the end of the lower link and can push the swing block to swing to the left, and a connecting shaft that can be connected with the pull rope.
  • the connecting shaft connected with the draw rope is fixed on the left side of the swing shaft.
  • the transmission mechanism includes a first swing link and a second swing link.
  • the other end of the first swing link is connected to the end of the lower link through a rotating pin
  • the other end of the second swing link is movably connected to the base through a positioning pin, and extends into The drawstring into the base is connected with the movable pin.
  • the transmission mechanism is a pendulum block
  • the lower part of the pendulum block is swingably arranged in the lower cavity of the base through a swing shaft
  • the lower shaft pin is arranged on the inner cavity of the base at the upper right position of the swing shaft.
  • the pendulum block is provided with a roller body that can be in contact with the arc-shaped end of the lower link and can push the pendulum block to swing from side to side.
  • the support wheel of the pull rope is arranged in the inner cavity of the base on the right side of the swing shaft and under the position of the lower shaft pin. The pull rope connected with the roller body bypasses the support wheel, and then bypasses the swing shaft and extends upward into the bed leg. Cavity.
  • the folding driving device includes a frame that can move up and down relative to the legs of the bed, a guide rod that is vertically fixed in the middle of the frame and extends downward from the middle of the bottom surface of the frame, and a guide rod that can move up and down along the guide rod.
  • the sliding seat, the other end of the upper connecting rod and the lower connecting rod movably connected with each bed leg are respectively connected to the corresponding position of the frame body through the upper rotating shaft pin and the lower rotating shaft pin.
  • the lower end of the transmission rod is rotationally connected with the corresponding side surface of the sliding seat through a lower transmission shaft pin
  • the upper end of the transmission rod is rotationally connected with the lower connecting rod through an upper transmission shaft pin
  • the frame is also provided with a locking mechanism that can maintain an open state when the bed is fully opened;
  • the locking mechanism includes an unlocking rod and a locking piece, and the unlocking rod is placed on the guide rod so as to move up and down.
  • the center of the frame body is provided with a vertical through hole penetrating up and down, the guide rod is inserted and fixed in the vertical through hole of the frame body, and the top surface of the guide rod is flush with the top surface of the frame body , And the lower end of the guide rod extends downward from the bottom surface of the frame body, an unlocking structure of the unlocking rod is provided on the top surface of the frame body, and the locking piece is located in the inner cavity of the unlocking rod.
  • the locking piece When the device is moved down to the lowest position to fully unfold the bed, the locking piece can be locked by supporting the bottom surface of the sliding seat through the unlocking rod and the corresponding side of the guide rod.
  • the unlocking structure drives the locking piece to retract into the inner cavity of the unlocking rod to be separated from the sliding seat, so that the sliding seat can be moved downward to be unlocked.
  • the locking piece is located in the lower cavity of the unlocking lever, and the locking piece is composed of at least two positioning pieces.
  • the lower part of each positioning piece is provided with a connecting hole for inserting the horizontal pin, and the positioning piece above the connecting hole It is provided with oblique strip-shaped holes, the positioning piece is folded together like a folding fan, and the lower part of the positioning piece is inserted through the connecting hole through a horizontal shaft pin so that the positioning piece can be unfolded and folded left and right like a folding fan.
  • the left and right ends of the pin are respectively fixed on the left and right corresponding sides of the lower part of the guide rod.
  • a folding pull shaft that can move up and down in the oblique strip hole to unfold and fold the positioning piece is inserted in the oblique strip hole.
  • the folding pull The left and right ends of the shaft are radially fixed on the left and right sides corresponding to the unlocking rod.
  • the unlocking rod is provided with a notch that extends out of the side of the unlocking rod when the positioning piece is expanded left and right, and the left and right sides of the guide rod corresponding to the notch are provided.
  • the side faces are also respectively provided with through cavities through which the positioning piece passes through the gap when it is unfolded and then extends out of the side of the guide rod.
  • the top surface of the positioning piece that extends through the cavity can be supported together with the bottom surface of the sliding seat.
  • the waist-shaped holes are respectively opened on the left and right sides, and a fixed shaft pin is inserted radially in the waist-shaped hole.
  • the left end of the fixed shaft pin passes through the left side of the unlocking lever and is fixed to the corresponding left side of the guide rod.
  • the right end of the fixed shaft pin passes through the right side of the unlocking rod and is fixed together with the corresponding right side of the guide rod.
  • the inner cavity of the unlocking rod above the notch is provided with a return spring, and the bottom of the return spring is above the notch
  • the support part in the inner cavity of the unlocking lever is supported, and the upper end of the return spring can be in contact with the fixed shaft pin and supported together.
  • the upper and lower hole distance of the waist-shaped hole is larger than that of the folding shaft The maximum distance after the positioning sheet is completely folded.
  • the top of the frame body is connected with a pull portion capable of pulling the frame body upward
  • the unlocking structure is the pressing extension end of the unlocking rod extending out of the vertical through hole or the top surface of the unlocking rod being opposite to the top surface of the vertical through hole.
  • the locking piece is located in the inner cavity of the middle part of the unlocking lever, the locking piece is composed of at least two positioning pieces, and the upper part of each positioning piece is provided with a connecting hole for inserting the horizontal pin, and the connecting hole
  • the positioning piece below the hole is provided with an oblique strip hole, the positioning piece is folded together like a folding fan, the upper part of the positioning piece is inserted together through the connecting hole through a horizontal pin, so that the positioning piece can be unfolded and folded left and right like a folding fan ,
  • the left and right ends of the horizontal shaft pin are respectively fixed on the left and right corresponding sides of the upper part of the guide rod, and a folding pull shaft that can move up and down in the diagonal hole to expand and fold the positioning piece is inserted in the diagonal strip hole
  • the left and right ends of the folding pull shaft are radially fixed on the left and right sides corresponding to the unlocking rod, and the unlocking rod is provided with a notch that can extend out of the side of the unlocking rod when the positioning piece
  • the buckle surface of the positioning piece that extends out of the through cavity can be buckled together with the bottom surface of the sliding seat and is located in the middle of the unlocking lever.
  • the left and right sides of the unlocking rod at the upper part of the inner cavity are respectively provided with vertical waist-shaped holes, the horizontal shaft pin is radially penetrated in the waist-shaped holes, and a return spring is provided in the inner cavity of the guide rod below the through cavity, The upper end of the return spring is in contact with the unlocking rod, and the lower end of the return spring is supported by the support rod located in the inner cavity of the guide rod, and the upper and lower hole distance of the waist-shaped hole is larger than the upper and lower holes of the folding pull shaft Move to the maximum distance after the positioning piece is fully folded. After pressing the top of the unlocking lever, the locking piece is retracted into the inner cavity of the unlocking lever and separated from the sliding seat. The upward pulling part can move the sliding seat downward to unlock.
  • the guard bar includes a left rod body and a right rod body that can be movably connected to the top of the corresponding bed leg, and a folding part that is located between the left rod body and the right rod body and can fold the left rod body and the right rod body, and the folding part includes a shell Body, an elastic positioning body located in the middle of the inner cavity of the housing, a left turning part located on the left side of the elastic positioning body and a right turning part located on the right side of the elastic positioning body, the right part of the left rod body extends into the left side of the housing
  • the inner cavity of the left rod body is rotatably connected with the housing, the right end of the left rod body is connected in transmission with the left turning part, and the left turning part is connected with the pull rope extending from the left leg base.
  • the left part of the right rod body extends into the inner cavity of the right part of the housing and is rotatably connected with the housing. Connected with a draw cord extending from the middle.
  • each rotating part includes a rotating block and a positioning block
  • the middle part of the rotating block is rotatably connected to the inner cavity of the corresponding housing through a rotating block pin
  • one end of the rotating block is movably connected with one end of the positioning block
  • the other end of the positioning block is rotatably connected with the end of the corresponding left rod body or the right rod body
  • the positioning block is provided with a positioning convex portion capable of contacting the elastic positioning body.
  • the positioning block is composed of two positioning sheets with the same shape, the two positioning sheets are symmetrically arranged, and one end of the two positioning sheets sandwiches one end of the corresponding rotating block and can move relatively through the rotating shaft.
  • the other ends of the two positioning plates clamp the ends of the corresponding left or right rod bodies and are connected to each other by rotation of the shaft pins of the plates, and one end of the corresponding pull rope bypasses the corresponding rotation
  • the arc-shaped side wall of the block is connected with the rotating shaft.
  • the elastic positioning body includes an extrusion spring and an extrusion rod that can be in contact with the positioning protrusion, and two spring cavities for placing corresponding extrusion springs are provided on the elastic positioning body, which are placed in the spring cavity.
  • One end of the compression spring in the squeeze spring is in contact with the bottom surface of the corresponding spring cavity, and the other end of the compression spring is in contact with the corresponding squeeze rod, respectively, and the side wall of the housing at the corresponding position of the squeeze spring.
  • a limited waist-shaped through hole is provided, and the squeeze rod is inserted into the corresponding limited waist-shaped through hole.
  • the squeeze rod When the guard rod is unfolded, the squeeze rod can be supported by the positioning protrusion on the positioning block At the same time, at this time, the three-point connection line of the corresponding set of sheet body pin, rotating shaft, and rotating block pin is located on a straight line from top to bottom.
  • the squeeze rod pushes the positioning protrusion
  • the rotating shaft is unlocked, and the positioning block rotates to separate the squeezing rod from the positioning protrusion.
  • a left rope spring is connected to the rope under the left rod body, one end of the left rope spring is connected to the outer end of the rope on the left rotating block, and the other end of the left rope spring passes through The draw rope passes downward through the inner cavity of the left leg and is connected to the transmission mechanism in the corresponding base.
  • a right draw rope spring is connected to the draw rope below the right rod body. One end of the right draw rope spring is connected to the right turn The outer end of the draw rope on the moving block is connected, and the other end of the right draw rope spring is connected with the transmission mechanism in the corresponding base through the draw rope downward through the inner cavity of the right leg; The lowest end connected by the folding part is lower than the point where the drawstring extends into the inner cavity of the corresponding bed leg.
  • the present invention has the advantage that the four-bar linkage mechanism is formed by defining the connection points at both ends of the upper link and the lower link, and the four-bar linkage mechanism has the function of driving the leg of the bed to tilt.
  • the downward pressing and folding driving device makes the bed unfold. In the initial stage of the unfolding of the bed, the unfolding amplitude of the upper end of the bed leg is greater than the unfolding amplitude of the lower end of the bed leg.
  • the lower link drives the transmission mechanism and then interlocks with the pull rope to lock the guard bar.
  • the lower end of the bed leg continues to expand to the normal use state; the folding drive device is lifted up, and the lower link loses drive to the transmission mechanism
  • the elastic positioning body pushes the corresponding rotating part to rotate so that the folding part is unlocked, and the folding driving device is continued to be raised to completely fold the bed.
  • the invention realizes one-key opening and one-key folding of the bed body through a simple four-bar linkage mechanism and a transmission mechanism, and the parts of the mechanism are simple, reliable and easy to manufacture.
  • the transmission roller of the transmission mechanism tops the lower arc surface of the arc-shaped end of the lower connecting rod, and the transmission roller locks the lower connecting rod to prevent the frame body from arching and the entire bottom frame smooth.
  • Figure 1 is a perspective view of an embodiment of the present invention applied to a children's play bed
  • Figure 2 is a perspective view of a base in Figure 1 with half of the shell removed;
  • Fig. 3 is a schematic structural diagram of the connecting rod in Fig. 2 connected with the corresponding bed leg, the base (partial), and the folding driving device;
  • Figure 4 is a front projection view of Figure 3 with one set of connecting rods retained and the side of the set of connecting rods as the front;
  • Fig. 5 is a structural schematic diagram of the connecting rod and the folding drive device, the base, and the leg of the bed in Fig. 4 moving to different positions;
  • Fig. 6 is a schematic structural view of the base with half of the housing removed in Fig. 2 after half of the swing block is cut away;
  • Figure 7 is a perspective view of Figure 2 after being folded
  • Figure 8 is a perspective view of Figure 7 after continuing to fold to the completion of the folding;
  • Fig. 9 is a schematic structural diagram showing the positional relationship between the driving roller and the arc-shaped end in Fig. 7;
  • Fig. 10 is a structural schematic diagram showing the positional relationship between the driving roller and the arc-shaped end in Fig. 8;
  • Figure 11 is a top view of Figure 1 after removing the connecting structure of the leg and the upper part of the leg;
  • Figure 12 is a plan view of Figure 11 when the second locking mechanism is replaced;
  • Figure 13 is a cross-sectional view along line A-A in Figure 11;
  • Figure 14 is a cross-sectional view of the pulling part in Figure 13 after being pulled up to unlock;
  • Figure 15 is a cross-sectional view along line B-B in Figure 12;
  • FIG. 16 is a cross-sectional view of the pulling part when the pulling part is pulled after pressing the unlocking lever in FIG. 15;
  • FIG. 17 is a schematic diagram of the structure of the second transmission mechanism in FIG. 6;
  • Figure 18 is a schematic structural diagram of the third transmission mechanism used in Figure 6;
  • Figure 19 is a perspective view of the middle part of a guard bar in Figure 2 with half of the shell removed;
  • Fig. 20 is a perspective view showing the specific structure of the guard bar when the guard bar in Fig. 19 is taken out separately;
  • Figure 21 is a front projection view of Figure 20;
  • FIG. 22 is a schematic structural view of the elastic positioning body unlocking the rotating part when the transmission mechanism in FIG. 21 relaxes the rope;
  • Figure 23 is an exploded view of the structure of Figure 20;
  • Figure 24 is an exploded view of the structure of Figure 14;
  • Figure 25 is a perspective view of Figure 1 with one leg of the bed removed;
  • Figure 26 is an exploded view of the structure of Figure 25;
  • Figure 27 is an exploded view of the structure of Figure 26 at another angle
  • Figure 28 is a perspective view of the connecting seat in Figure 27 at another angle
  • Fig. 29 is a further structural exploded view of Fig. 26.
  • the portable children’s play bed of this embodiment includes four bed legs 1 and a folding drive device placed in the middle of the bed bottom that can fold and unfold the bed body. Between two adjacent bed legs 1 The top of each bed is provided with a guard rod 12 that can be folded in the middle, and both ends of the guard rod 12 are movably connected to the top of the corresponding bed leg 1. At the bottom of each bed leg 1 is provided a connecting rod that is movably connected to the folding drive device The connecting mechanism consists of an upper connecting rod 21 and a lower connecting rod 31 arranged up and down.
  • the connecting mechanism includes a base 2, a transmission mechanism arranged in the inner cavity of the base 2, and one end of the upper connecting rod 21 extends into the base 2
  • the upper cavity 22 is rotatably connected with the base 2 by an upper shaft pin 221
  • the other end of the upper link 21 is rotatably connected with the frame body 6 in the folding drive device by an upper shaft pin 222
  • the lower link 31 One end extends into the lower cavity 23 of the base 2 and is connected by a lower shaft pin 231 to rotate with the base 2, and the end of the lower connecting rod that extends into the lower cavity 23 of the base 2 is linked with the transmission mechanism.
  • the pin 231 is located below the upper shaft pin 221 and connected to the base 2 in rotation, and the other end of the lower link 31 is connected in rotation with the frame body 6 by the lower rotation shaft pin 232.
  • the first transmission mechanism is the swing block 3.
  • the swing block 3 is swingably arranged in the lower cavity 23 of the base 2 through the swing shaft 37.
  • the lower shaft pin 231 is arranged in the base cavity at the upper right position of the swing block 3.
  • the swing block 3 is provided with a drive roller 34 that can be in contact with the end of the lower link and can push the swing block 3 to swing to the left, and a connecting shaft 36 that can be connected with the rope 4, and the swing shaft 37 is provided on the lower pin
  • the connecting shaft 36 connected with the drawstring 4 is fixed to the left of the swing shaft 37.
  • the swing block 3 is composed of two swing pieces, and the two swing pieces are fixed together by a swing piece connecting column 35.
  • the drive roller 34 When the bed is folded, the drive roller 34 is located on the right side of the swing shaft 37, as shown in Figure 10.
  • the drive roller 34 and the connecting shaft 36 are respectively located in the cavity of the swing block 3, at the end of the lower link in the inner cavity of the base
  • the end of the lower link extending into the cavity of the swing block 3 is an arc-shaped end 32.
  • the other end of the lower link 31 faces When moving down to the lowest end, the bottom end of the arc-shaped end 32 of the lower link 31 is supported with the drive roller 34.
  • the transmission roller 34 is composed of a positioning shaft pin 33 pierced and connected on two swinging pieces and a transmission wheel 341 rotatably sleeved on the positioning shaft pin 33 in the cavity of the swing block.
  • the side wall of the transmission wheel 341 can be connected to the arc
  • the face ends 32 are in contact with each other; the two ends of the connecting shaft 36 are respectively inserted and fixed on two swinging pieces arranged in parallel on the left and right, the drawstring 4 is connected with the loop, and the loop is sleeved on the connecting shaft 36.
  • the drive roller 34 touches the lower arc surface of the arc-shaped end of the lower link, and the drive roller 34 locks the lower link 31 to prevent the frame from being arched and the entire bottom The frame is flat.
  • the arc-shaped end of the lower link is elliptical.
  • the driving roller passes through the curved surface of the elliptical arc-shaped end and touches the lower arc surface of the elliptical-shaped arc-shaped end. .
  • the second type of transmission mechanism includes a first swing link 301 and a second swing link 302. 304 can be relatively rotatably connected.
  • the other end of the first swing link 301 is connected to the end of the lower link 31 through a rotating pin
  • the other end of the second swing link 302 is connected to the base 2 through a positioning pin. They are movably connected together, and the drawstring 4 extending into the base 2 is connected to the movable pin 304 together.
  • the first swing link 301 is composed of a front rod and a rear rod.
  • the front rod is fixed on one side of the support frame 303
  • the rear rod is fixed on the other side of the support frame 303.
  • the second swing link 302 is composed of The front rod body and the rear rod body are composed.
  • the rear side wall of the front rod body is attached to the front side wall of the front rod
  • the front side wall of the rear rod body is attached to the rear side wall of the rear rod
  • the movable pin 304 connects the front rod.
  • the rear rod piece, the front rod body and the rear rod body are stringed together and movably connected together.
  • the other end of the front rod piece and the rear rod piece are connected in series with the arc-shaped end 32 of the lower connecting rod 31 through the rotating pin.
  • the other ends of the front rod body and the rear rod body are movably connected together with the base 2 through the positioning pins arranged in series.
  • the rotating pin When the children's folding bed is fully unfolded, the rotating pin is located above the connection line between the movable pin 304 and the lower shaft pin 231, thereby locking the children's folding bed.
  • the end of the lower link 31 is lifted upwards, driving the first swing link 301 and the second swing link 302 to rotate, the movable pin 304 moves downwards, and the pull rope 4 is pulled tightly; The drawstring 4 is relaxed.
  • the rotating pin is located above the connection line between the movable pin 304 and the lower shaft pin 231, which locks the lower connecting rod 31 to avoid arching of the frame and make the entire bottom frame flat.
  • the third transmission mechanism is a pendulum block 305.
  • the lower part of the pendulum block 305 is swingably arranged in the lower cavity 23 of the base 2 through a swing shaft 37, and the lower shaft pin 231 is arranged at the upper right position of the swing shaft 37.
  • the pendulum block 305 is provided with a roller body 340 that can contact with the arc-shaped end 32 of the lower link 31 and can push the pendulum block 305 to swing left and right.
  • the drawstring 4 is located at the end of the lower link
  • the roller body 340 on the side of the roller body 340 is connected, and the support wheel 306 of the rope 4 is arranged in the inner cavity of the base on the right side of the swing shaft 37 and below the lower shaft pin 231.
  • the rope 4 connected to the roller body 340 is wound around After passing the supporting wheel 306, and then bypassing the swing shaft 37, it extends upward into the inner cavity of the leg 1 of the bed.
  • a rotating roller is rotatably sleeved on the oscillating shaft 37, the drawstring 4 is connected with the loop, and the loop is placed on the roller body 340 of the pendulum block 305, and the drawstring 4 goes around the supporting wheel 306 and then the turning roll And extend upward into the inner cavity of the leg 1 of the bed.
  • the roller body 340 and the end of the lower link can adopt a similar design to the first transmission mechanism to obtain a locking effect.
  • Figure 18 shows the structure similar to the lower link of the first transmission mechanism and the top contact position when locked. .
  • the corresponding structure can be obtained by combining the drawings and the specific structure of the first transmission mechanism, so it will not be described in detail.
  • the distance between the upper shaft pin 221 and the upper pivot pin 222 on the upper link 21 is smaller than the distance between the lower pivot pin 231 and the lower pivot pin 232 on the lower link 31.
  • the bottom of the base 2 is provided with a roller 25 that facilitates the movement of the bed leg 1 back and forth.
  • the bottom of the lower cavity 23 is provided with a third cavity 24, and the roller 25 is located in the third cavity 24.
  • the folding driving device includes a frame body 6 that can move up and down relative to the bed leg 1, a guide rod 61 that is vertically fixed in the middle of the frame body 6 and extends downward from the middle of the bottom surface of the frame body 6, and can move up and down along the guide rod 61
  • the other ends of the upper connecting rod 21 and the lower connecting rod 31 that are movably connected to each leg of the bed are connected to the corresponding position of the frame 6 through the upper rotating shaft pin 222 and the lower rotating shaft pin 232, respectively.
  • the seat 7 is movably connected with the corresponding lower connecting rod 31 through the transmission rod 38.
  • the lower end of the transmission rod 38 is rotationally connected to the corresponding side of the sliding seat 7 through the lower transmission shaft pin 224, and the upper end of the transmission rod 38 is rotationally connected to the lower connecting rod 31 through the upper transmission shaft pin 223.
  • the upper transmission shaft pin 223 is located on the connection line between the upper rotation shaft pin 222 and the lower transmission shaft pin 224, or the upper transmission shaft pin 223 is located above or below the connection line between the upper rotation shaft pin 222 and the lower transmission shaft pin 224.
  • the other end of the lower link 31 is rotatably connected with the frame body 6 by the lower rotation shaft pin 232, and the positioning point of the lower rotation shaft pin 232 on the frame body 6 is located diagonally above and to the right of the virtual point A and lower than the upper rotation shaft pin
  • the virtual point A is the fourth point position of the parallelogram formed by connecting the three points of the upper shaft pin 221, the upper rotating shaft pin 222, and the lower shaft pin 231.
  • the angle a between the line connecting the positioning point of the lower rotating shaft pin 232 and the virtual point A and the horizontal line is 45°.
  • the frame body 6 is also provided with a locking mechanism that can maintain the open state when the bed body is fully opened; the locking mechanism includes an unlocking rod 64 and a locking piece.
  • the unlocking rod 64 can be moved up and down in the inner cavity of the guide rod 61, and the frame
  • the center of the body 6 is provided with a vertical through hole 62 penetrating up and down.
  • the guide rod 61 is inserted and fixed in the vertical through hole 62 of the frame body 6.
  • the top surface of the guide rod 61 is flush with the top surface of the frame body, and the guide rod 61
  • the lower end of the frame body 6 extends downward from the bottom surface of the frame body 6, an unlocking structure of the unlocking rod 64 is provided on the top surface of the frame body 6, the locking piece is located in the inner cavity of the unlocking rod 64, when the folding driving device moves down to the lowest
  • the lock piece can be locked by supporting the bottom surface of the sliding seat 7 through the corresponding side surfaces of the unlocking rod 64 and the guide rod 61.
  • the lock piece is driven by the unlocking structure Retracting into the inner cavity of the unlocking lever 64 to disengage from the sliding seat 7, the sliding seat 7 can be moved downward to unlock.
  • the locking piece is located in the lower cavity of the unlocking lever 64.
  • the locking piece is composed of at least two positioning pieces 63.
  • the lower part of each positioning piece 63 is provided with a connecting hole for inserting the horizontal pin 66, and a positioning piece 63 above the connecting hole
  • the positioning piece 63 is folded together like a folding fan.
  • the left and right ends of the shaft pin 66 are respectively fixed on the left and right corresponding side surfaces of the lower part of the guide rod 61, and a foldable pull that can move up and down in the oblique strip hole 631 to unfold and fold the positioning piece 63 is inserted in the oblique strip hole 631.
  • the left and right ends of the folding shaft 65 are radially fixed on the left and right sides corresponding to the unlocking rod 64.
  • the unlocking rod 64 is provided with a notch 641 that can extend out of the side of the unlocking rod when it is unfolded left and right.
  • the left and right sides of the guide rod 61 at the corresponding position of 641 are also respectively provided with a through cavity 611 on the side of the guide rod after passing through the gap 641 when the positioning piece 63 is unfolded. 7
  • the bottom surfaces are supported together.
  • the left and right sides of the unlocking lever 64 located in the upper part of the inner cavity of the unlocking lever are respectively provided with vertical waist-shaped holes 642.
  • a fixed shaft pin 68 is inserted radially in the waist-shaped hole 642 to fix the shaft pin.
  • the left end of 68 passes through the left side of the unlocking rod and is fixed together with the corresponding left side of the guide rod 61, and the right end of the fixed shaft pin 68 passes through the right side of the unlocking rod and is fixed together with the corresponding right side of the guide rod 61, which is located above the gap 641.
  • the inner cavity of the unlocking lever is provided with a return spring 71, the bottom of the return spring 71 is supported by the support part in the inner cavity of the unlocking lever above the notch 641, and the upper end of the return spring 71 can be in contact with the fixed shaft pin 68 While supported together, the upper and lower hole distance L of the waist-shaped hole 642 is greater than the maximum distance K after the folding pull shaft 65 moves up and down to make the positioning piece 63 completely folded.
  • the unlocking structure includes a pull ring 67 and a pull rope body. When the pull ring is selected, the two ends of the pull ring are connected with a rotatably pulling shaft connected to the top surface of the unlocking rod 64.
  • the top of the frame body 6 is connected with a pull portion 671 capable of pulling the frame body 6 upward
  • the unlocking structure is that the pressing and extending end of the unlocking rod extending out of the vertical through hole 62 or the top surface of the unlocking rod being opposite to the top surface of the vertical through hole 62 Press the flush end flush
  • the locking piece is located in the middle cavity of the unlocking rod
  • the locking piece is composed of at least two positioning pieces 63
  • the upper part of each positioning piece 63 is provided with a connecting hole for inserting the horizontal shaft pin 66.
  • the positioning piece 63 below the connecting hole is provided with an oblique strip hole 632.
  • the positioning piece 63 is folded together like a folding fan.
  • the left and right ends of the horizontal axis pin 66 are respectively fixed on the left and right corresponding sides of the upper part of the guide rod 61, and the diagonal hole 632 is pierced and can be moved up and down in the diagonal hole 632 to expand and fold.
  • the folding pull shaft 65 of the folding positioning piece 63, the left and right ends of the folding pull shaft 65 are radially fixed on the left and right sides corresponding to the unlocking rod 64.
  • the unlocking rod 64 is provided with a positioning piece 63 that can extend out the sides of the unlocking rod when unfolded left and right.
  • the left and right sides of the guide rod 61 corresponding to the notch 641 are respectively provided with positioning pieces 63 that pass through the notches 641 and then extend out of the through cavity 611 on the side of the guide rod when unfolded, and the positioning pieces that extend out of the through cavity 611
  • the buckle surface of 63 can be buckled together with the bottom surface of the sliding seat 7.
  • the left and right sides of the unlocking lever 64 located in the upper part of the inner cavity of the unlocking lever are respectively provided with vertical waist-shaped holes 642, and the horizontal axis pin 66 penetrates radially. In the waist-shaped hole 642, a return spring 71 is arranged in the inner cavity of the guide rod below the through cavity 611.
  • the support rod 69 in the cavity is supported, and the upper and lower hole distance L of the waist-shaped hole 642 is greater than the maximum distance K after the folding pull shaft 65 moves up and down to fully fold the positioning piece 63.
  • the locking piece retracts Into the inner cavity of the unlocking lever 64 to disengage from the sliding seat 7, the pulling portion 671 pulled upward can move the sliding seat 7 downward to unlock.
  • the guard bar 12 includes a left rod body 12a and a right rod body 12b that can be movably connected to the top of the corresponding bed leg 1, and a folding part that is located between the left rod body 12a and the right rod body 12b and can fold the left rod body 12a and the right rod body 12b.
  • the folding part includes The housing 8, the elastic positioning body 9 located in the middle of the inner cavity of the housing 8, the left turning part on the left side of the elastic positioning body 9 and the right turning part on the right side of the elastic positioning body 9, the right part of the left rod body 12a extends Into the left inner cavity of the shell and rotatably connected with the shell, the right end of the left rod body 12a is connected to the left rotating part in transmission, and the left rotating part is connected to the drawstring 4 extending from the base of the left leg Connected, the left part of the right rod body 12b extends into the inner cavity of the right part of the housing and is rotatably connected with the housing, the left end of the right rod body 12b is connected with the right turning part in transmission, and the right turning part is connected with the right leg base The pull cord 4 extending from the middle is connected.
  • Each rotating part includes a rotating block 81 and a positioning block 82.
  • the middle part of the rotating block 81 is rotatably connected to the inner cavity of the corresponding housing through a rotating block shaft pin 812.
  • One end of the rotating block 81 is movably connected with one end of the positioning block 82 for positioning.
  • the other end of the block 82 is rotatably connected with the corresponding end of the left rod body 12a or the right rod body 12b, and the positioning block 82 is provided with a positioning protrusion 821 capable of contacting the elastic positioning body 9.
  • the positioning block 82 is composed of two positioning sheets with the same shape.
  • the two positioning sheets are symmetrically arranged, and one end of the two positioning sheets sandwiches one end of the corresponding rotating block 81 and can be relatively movably connected by a rotating shaft 84 Together, the other ends of the two positioning pieces sandwich the ends of the corresponding left rod body 12a or the right rod body 12b and are connected to each other by rotation of the piece shaft pin 813, and one end of the corresponding drawstring 4 bypasses the corresponding rotation.
  • the arc-shaped side wall of the block 81 is connected with the rotating shaft 84 together.
  • the elastic positioning body 9 includes an extrusion spring 91 and an extrusion rod 92 that can be in contact with the positioning protrusion 821.
  • Two spring cavities 93 for placing corresponding extrusion springs 91 are provided on the elastic positioning body 9 and placed in the spring cavity.
  • One end of the compression spring 91 in 93 respectively touches the bottom surface of the corresponding spring cavity 93, and the other end of the compression spring 91 respectively touches the corresponding compression rod 92, and is in contact with the corresponding position of the compression spring 91.
  • the side walls of the housing are respectively provided with limited waist-shaped through holes 83, and the squeezing rod 92 is inserted into the corresponding limiting waist-shaped through holes 83.
  • the squeezing rod 92 can interact with the positioning block 82.
  • the positioning protrusions 821 are supported together.
  • the three-point connection line of the corresponding group of the plate shaft pin 813, the rotating shaft 84, and the rotating block shaft pin 812 is located on a straight line from top to bottom.
  • the squeezing rod 92 pushes the positioning protrusion 821 to unlock the rotating shaft 84, and the positioning block 82 rotates to separate the squeezing rod 92 from the positioning protrusion 821.
  • the side wall of the elastic positioning body 9 corresponding to the spring cavity 93 is provided with a side wall notch 94 capable of accommodating the corresponding extrusion rod 92.
  • the arc-shaped side wall of the rotating block 81 is provided with hook-shaped protrusions 811 that can be inserted into the corresponding drawstring 4 at intervals.
  • a limit slot 814 that can be inserted into the corresponding draw rope 4 is provided on the arc-shaped side surface of the rotating block 81, and the rope body corresponding to the draw rope 4 is located in the limit slot 814.
  • a left rope spring 41 is connected to the rope 4 under the left rod body 12a.
  • One end of the left rope spring 41 is connected to the outer end of the rope 4 on the left rotating block, and the other end of the left rope spring 41 is pulled through
  • the rope passes downward through the inner cavity of the left leg 1 and is connected to the transmission mechanism in the corresponding base 2.
  • a right rope spring is connected to the rope 4 under the right rod body 12b, and one end of the right rope spring is connected to the right
  • the outer end of the drawstring 4 on the rotating block is connected, and the other end of the right drawstring spring is connected with the transmission mechanism in the corresponding base 2 through the drawstring downward through the inner cavity of the right leg 1; drawstring 4
  • the lowest end B connected with the folding part is lower than the point C where the drawstring 4 extends into the inner cavity of the corresponding bed leg.
  • the wire rope is arranged obliquely, so that the pull rope 4 has an upward lifting effect on the folding part, so that the folding part located in the middle of the guard bar is easier to open, and the pull rope 4 has an upward force on the folding part, which has a lifting effect.
  • the bed leg 1 has a hollow structure, and the drawstring 4 extends into the bed leg 1 and extends from the opening of the upper side wall of the bed leg 1 to be connected to the middle of the guard bar 12.
  • the frame body 6 is provided with an auxiliary support rod 601 that can rotate relative to the frame body 6.
  • the auxiliary support rod 601 is L-shaped. When the bed leg 1 is fully opened, the end of the L-shaped auxiliary support rod 601 touches the ground .
  • the other end of the drawstring 4 passes through the inner cavity of the bed leg and passes through the inner cavity of the upper portion of the bed leg to be connected with the folding part.
  • the transmission mechanism can be connected with the folded part of the middle part of the guard bar 12 on the top of the children's play bed through the draw rope 4, and the arc-shaped end 32 is an elliptical end.
  • a connecting seat 5 is provided on the top of the leg of the children's play crib.
  • the top view projection of the connecting seat 5 is in an "L" shape.
  • the left groove 51 and the right groove 52 are movably connected.
  • the left guard bar can swing up and down in the left groove 51, and the right guard bar can swing up and down in the right groove 52.
  • the side wall of the leg 1 is provided with two side wall through holes 11 of equal height and spaced apart, a left wire block 53 is buckled on the left side wall through hole, and a movable insert is provided on the top of the left wire block 53 Pass through the left groove 51 and then pass through the through hole on the left wall to extend into the inner cavity of the leg to the left lead groove 55 of the drawstring 4 at the bottom of the leg, and the right lead block is buckled on the through hole on the right wall 54.
  • the top of the right wire block 54 is provided with a right wire groove which can be movably embedded in the right groove 52 and then through the left wall through hole to extend into the inner cavity of the bed leg to the bottom of the bed leg. .
  • the left and right sides of the left wire block 53 are convexly provided with left lugs 57 that can be buckled and fixed with the corresponding inner wall grooves 56 of the connecting seat 5 at the position of the left groove 51, and the left and right sides of the right wire block 54 are convexly provided with
  • the connecting seat 5 at the position of the right groove 52 corresponds to the right lug that is buckled and fixed with the inner wall groove 56.
  • a sleeve cavity is vertically arranged at the corners of the inner cavity of the connecting seat 5, and the top of the bed leg 1 is inserted into the sleeve cavity and fixed with the connecting seat 5 together.
  • the left guard bar is rotatably connected with the connecting seat 5 through a left rotation shaft
  • the right guard bar is rotatably connected with the connecting seat 5 through a right rotation shaft.
  • Bolt holes or screw holes are provided on the inner and outer sides of the corners of the connecting seat 5, which can be inserted into the inner cavity of the connecting seat horizontally by bolts or inserted into the inner cavity of the connecting seat by bolts.
  • the bottom surface of the left lead groove 55 is a circular arc groove
  • the bottom surface of the right lead groove is also a circular arc groove.
  • the connecting seat 5 is a one-time injection molded plastic integral structure.
  • Unfolding process When the folding bed is in the folded state, the folding driving device is at the highest position of the position passed during the displacement process, the upper link 21 rotates up to the vertical position, and the left and right rods of all guard bars rotate downward to make the guard bars Fold, as shown in Figure 8. Press down the folding driving device, the folding driving device drives the upper link 21 and the lower link 31 to rotate.
  • the bed leg 1 pulls outward to correspond
  • the connecting seat 5 on the top of the bed leg 1 keeps the connecting seat 5 away from each other, and the driving guard bar 12 is expanded to a nearly horizontal state, as shown in Fig. 7;
  • the folding driving device is continued to be pressed down, and the folding driving device drives the upper connecting rod 21 and
  • the lower link 31 rotates, and the arc-shaped end 32 of the lower link 31 pushes the drive roller 34 to swing the swing block 3 in a counterclockwise direction.
  • the general production process is difficult to ensure the processing accuracy of the length of the drawstring 4, and the connecting shaft 36 to
  • the length of the rope 4 between the rotating shafts 84 is slightly longer, so that the rotating part of the folding part cannot be pulled in time, so that the folding part is not in the locked state; the length of the rope 4 between the connecting shaft 36 and the rotating shaft 84 is slightly shorter, and the inner cavity of the base 2
  • the transmission mechanism that can pull the rope 4 causes the rope to be stressed, which may exceed the maximum load force of the rope and break.
  • the elastic force of the rope spring is much greater than the elastic force of the compression spring 91 on the elastic positioning body 9.
  • the protection is first overcome
  • the gravity of the rod causes the guard rod to expand, while overcoming the elastic resistance of the compression spring 91, the drawstring 4 tightens the corresponding rotating part, and drives the rotating part to make a corresponding set of the sheet body pin 813, the rotating shaft 84, and the rotating block pin 812
  • the three-point connection line is located on a straight line from top to bottom to lock the folding part.
  • the transmission mechanism continues to drive the pull rope 4 to make the tension spring in a tensioned state.
  • the locking piece protrudes from the corresponding side surfaces of the unlocking rod 64 and the guide rod 61 and is supported by the bottom surface of the sliding seat 7 to be locked. So far, the folding bed is in a fully opened and locked state.
  • Folding process when the folding bed is in the unfolded state, as shown in Figure 1; the pull ring 67 on the folding driving device can be lifted up with only one hand, and the folding driving device is unlocked by the unlocking mechanism, so as to allow the folding driving device to continue on Move in the upward direction; continue to lift the pull ring 67, the folding drive device drives the upper link 21 and the lower link 31 to rotate, when the upper link 21 and the lower link 31 rotate, the base 2 and the bed leg 1 move inwardly While gradually tilting to the outside; the end surface of the arc-shaped end 32 of the lower link 31 moves away from the transmission roller axis around the transmission roller 34, so that the pull rope 4 gradually loses its pulling force, and the elastic positioning body 9 in the folding part pushes the corresponding The rotating part rotates to unlock the folding part and fold the guard bar, as shown in Figure 7; continue to lift the pull ring 67, the guard bar drives the corresponding bed leg 1 to continue to move closer to the folding driving device, and the left and right rods of the guard
  • the four-link mechanism is formed, so that when the folding bed is unfolded, the bed leg 1 can generate a movement track that first tilts outward and then returns to the vertical. It is divided into two stages of unfolding process.
  • the unfolding amplitude of the upper end of the bed leg is greater than the unfolding amplitude of the lower end of the bed leg.
  • the lower end of the bed leg continues to expand to the upper end of the bed leg, and the bed leg returns to the vertical normal state of use, realizing the complete expansion of the bed body.
  • the design of the mechanism facilitates the unfolding of the guard bar, thereby realizing the opening and closing of the folding bed by a single person.
  • the present invention has a significant advantageous feature, that is, one-step operation, which pushes down or lowers the folding drive device to open the bed body, and pulls up or lifts the folding drive device to fold the bed body.
  • one-step operation which pushes down or lowers the folding drive device to open the bed body, and pulls up or lifts the folding drive device to fold the bed body.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Pediatric Medicine (AREA)
  • Invalid Beds And Related Equipment (AREA)

Abstract

一种便携式儿童游戏床，包括床腿和折叠驱动装置，在相邻两条床腿之间的顶部分别设置有护杆，护杆两端分别与对应的床腿顶部活动相连接，在每条床腿的底部设置有连接机构，连杆由上下排列的上连杆和下连杆组成，连接机构包括底座和传动机构，上连杆的一端与底座相连接，上连杆的另一端与架体转动相连接，下连杆一端与底座转动相连接，且伸入到底座下部内腔中的下连杆端部与传动机构联动在一起，下连杆的另一端与架体转动相连接。其优点在于：通过拉绳和连接机构实现护杆与折叠驱动装置的联动，从而向上拉动折叠驱动装置和向下推动折叠驱动装置时护杆也能随同动作，只需在折叠驱动装置位置处一处施力就能实现整个床体的折叠与展开。

Description

一种便携式儿童游戏床 技术领域
本发明涉及一种儿童游戏床制作技术领域，尤其指一种便携式儿童游戏床。
背景技术
现有一种申请号为CN201310306550.1名称为《一种儿童娱乐床》的中国发明专利申请公开了一种结构，其结构包括四根支腿和底部中央控制装置，每根所述的支腿的下部内侧铰设有上连杆和下连杆，相邻两所述的支腿的上端之间铰设有上支撑梁，所述的上支撑梁中部设有横梁折叠关节，所述的支腿与所述的上支撑梁之间设有上折叠机构，所述的上连杆和下连杆外端之间设有下折叠机构，所述的上连杆和下连杆的内端与所述的底部中央控制装置连接并由底部中央控制装置带动折叠展开，所述的横梁折叠关节、下折叠机构、上折叠机构均由所述的上连杆和下连杆带动折叠展开。本发明目的是克服了现有技术的不足，提供一种稳定性好，折叠和展开操作方便的儿童娱乐床。该结构的缺点是，该儿童娱乐床需要设置展开拉绳、折叠拉绳及横梁拉绳共计24条拉绳，制造过程太过复杂。
发明内容
本发明所要解决的技术问题是针对上述现有技术现状而提供一种结构巧妙、牢固、使用灵活方便且生产成本低的便携式儿童游戏床。
本发明解决上述技术问题所采用的技术方案为：本便携式儿童游戏床， 包括四条床腿和置于床底中部能折叠和展开床体的折叠驱动装置，在相邻两条床腿之间的顶部分别设置有中部能折叠的护杆，所述护杆两端分别与对应的床腿顶部活动相连接，在每条床腿的底部设置有通过连杆与折叠驱动装置活动相连接的连接机构，所述连杆由上下排列的上连杆和下连杆组成，其特征在于：所述连接机构包括底座、设置于底座内腔中的传动机构，所述上连杆的一端伸入到底座的上部内腔中并由上轴销能转动地与底座相连接，所述上连杆的另一端由上转动轴销与折叠驱动装置中的架体转动相连接，所述下连杆一端伸入到底座的下部内腔中由下轴销与底座转动相连接，且伸入到底座下部内腔中的下连杆端部与传动机构联动在一起，所述下轴销位于上轴销的下方与底座转动相连接，所述下连杆的另一端由下转动轴销与架体转动相连接。
作为改进，所述传动机构为摆动块，所述摆动块通过摆动轴能摆动地设置于底座的下部内腔中，所述下轴销设置于摆动块右上方位置的底座内腔中，在所述摆动块上设置有能与下连杆端部相顶触而能推动摆动块向左摆动的传动辊以及能与拉绳相连接的连接轴，所述摆动轴设置于下轴销左下方的摆动块下部位置上，与拉绳相连接的连接轴固定于摆动轴的左边。
作为改进，所述传动机构包括第一摆动连杆和第二摆动连杆，所述第一摆动连杆和第二摆动连杆一端以″人″形折叠并通过活动销能相对转动地连接在一起，所述第一摆动连杆的另一端通过转动销与下连杆的端部转动相连 接，而所述第二摆动连杆的另一端通过定位销轴与底座活动连接在一起，伸入到底座中的拉绳与活动销连接在一起。
作为改进，所述传动机构为摆块，所述摆块下部通过摆动轴能摆动地设置于底座的下部内腔中，所述下轴销设置于摆动轴右上方位置的底座内腔上，在摆块上设置有能与下连杆的弧形端部相顶触而能推动摆块左右摆动的辊体，所述拉绳与位于下连杆端部侧面位置的辊体相连接，在位于摆动轴右边且位于下轴销下方位置的底座内腔中设置有拉绳的支撑轮，与辊体相连接的拉绳绕过支撑轮，再绕过摆动轴而向上伸入至床腿的内腔中。
作为改进，所述折叠驱动装置包括相对于床腿能上下移动的架体，竖向固定在架体的中部并从架体的底面中部向下延伸出的导向杆和能沿导向杆上下移动的滑动座，与每条床腿活动相连接的上连杆与下连杆的另一端分别通过上转动轴销与下转动轴销与架体对应位置转动相连接，所述滑动座通过传动杆与对应下连杆活动相连接。
进一步改进，所述传动杆的下端通过下传动轴销与滑动座的相应侧面转动相连接，而所述传动杆的上端通过上传动轴销与下连杆转动相连接。
进一步改进，在所述架体上还设置有当床体完全打开后能保持打开状态的锁定机构；所述锁定机构包括解锁拉杆和锁定片，所述解锁拉杆能上下移动地置于导向杆的内腔中，所述架体的中心设置上下贯穿的竖向通孔，所述导向杆穿置固定于架体的竖向通孔中，所述导向杆的顶面与架体顶面相平齐， 而导向杆的下端从架体的底面向下延伸出，在所述架体的顶面上设置有解锁拉杆的解锁结构，所述锁定片位于解锁拉杆的内腔中，当所述折叠驱动装置向下移动至最低位置而完全展开床体时，所述锁定片能经过解锁拉杆与导向杆的对应侧面中伸出而与滑动座底面相支撑而锁定，当床体需要折叠而解锁时通过解锁结构带动锁定片缩回到解锁拉杆的内腔中而与滑动座脱离，能使滑动座向下移动而解锁。
进一步改进，所述锁定片位于解锁拉杆的下部内腔中，锁定片由至少两片定位片组成，每片定位片的下部设置有用于穿插横轴销的连接孔，在连接孔上方的定位片上设置有斜条形孔，所述定位片象折叠扇一样折叠在一起，定位片下部通过横轴销经连接孔穿插在一起而使定位片能象折叠扇一样左右展开与折叠，所述横轴销的左右两端分别固定于导向杆下部的左右对应侧面上，在斜条形孔中穿置有能在斜条形孔中上下移动而展开和折叠定位片的折叠拉轴，所述折叠拉轴的左右两端以径向固定于解锁拉杆对应的左右侧面上，在所述解锁拉杆上设置有定位片左右展开时能伸出解锁拉杆侧面的缺口，而与缺口相对应位置的导向杆的左右侧面上亦分别设置有定位片展开时经过缺口再伸出导向杆侧面的通腔，伸出通腔的定位片顶面能与滑动座底面支撑在一起，位于解锁拉杆中部内腔上部的解锁拉杆左右侧面上分别开有竖向的腰形孔，在腰形孔中径向穿置有固定轴销，所述固定轴销左端穿过解锁拉杆左侧面与导向杆对应左侧面固定在一起，所述固定轴销右端穿过解锁拉杆右侧 面与导向杆对应右侧面固定在一起，位于缺口上方的解锁拉杆内腔中设置有复回弹簧，所述复回弹簧的底部与缺口上方的解锁拉杆内腔中的支撑部相支撑，而所述复回弹簧的上端能与固定轴销相顶触而支撑在一起，所述腰形孔的上下孔距要大于折叠拉轴上下移动而使定位片完全折叠后的最大距离。
进一步改进，所述架体的顶部连接有能向上拉动架体的拉部，所述解锁结构为解锁拉杆伸出竖向通孔的按压伸出端或解锁拉杆顶面与竖向通孔顶面相平齐的按压平齐端，所述锁定片位于解锁拉杆的中部内腔中，锁定片由至少两片定位片组成，每片定位片的上部设置有用于穿插横轴销的连接孔，在连接孔下方的定位片上设置有斜条状孔，所述定位片象折叠扇一样折叠在一起，定位片上部通过横轴销经连接孔穿插在一起而使定位片能象折叠扇一样左右展开与折叠，所述横轴销的左右两端分别固定于导向杆上部的左右对应侧面上，在斜条状孔中穿置有能在斜条状孔中上下移动而展开和折叠定位片的折叠拉轴，所述折叠拉轴的左右两端以径向固定于解锁拉杆对应的左右侧面上，在解锁拉杆上设置有定位片左右展开时能伸出解锁拉杆侧面的缺口，而与缺口相对应位置的导向杆的左右侧面上亦分别设置有定位片展开时经过缺口再伸出导向杆侧面的通腔，伸出通腔的定位片的卡扣面能与滑动座底面卡扣在一起，位于解锁拉杆中部内腔上部的解锁拉杆左右侧面上分别开有竖向的腰形孔，所述横轴销径向穿置在腰形孔中，位于通腔下方的导向杆内腔中设置有复回弹簧，所述复回弹簧的上端与解锁拉杆相顶触，而所述复回弹 簧的下端与位于导向杆内腔中的支撑杆相支撑，所述腰形孔的上下孔距要大于折叠拉轴上下移动而使定位片完全折叠后的最大距离，按压解锁拉杆顶部后带动锁定片缩回到解锁拉杆的内腔中而与滑动座脱离，向上拉动的拉部能使滑动座向下移动而解锁。
作为改进，所述护杆包括能与对应床腿顶部活动相连接的左杆体与右杆体以及位于左杆体与右杆体之间且能折叠左杆体与右杆体的折叠部，所述折叠部包括壳体、位于壳体内腔中部的弹性定位体以及位于弹性定位体左侧的左转动部和位于弹性定位体右侧的右转动部，所述左杆体的右部伸入到壳体的左部内腔中与壳体能转动地连接在一起，所述左杆体的右端与左转动部传动相连接，所述左转动部与左侧床腿底座中延伸上来的拉绳相连接，所述右杆体的左部伸入到壳体右部内腔中与壳体能转动地连接在一起，所述右杆体的左端与右转动部传动相连接，所述右转动部与右侧床腿底座中延伸上来的拉绳相连接。
进一步改进，每个转动部包括转动块和定位块，所述转动块的中部通过转动块轴销转动地连接在对应壳体内腔中，所述转动块的一端与定位块的一端活动相连接，所述定位块的另一端与对应左杆体或右杆体的端部转动相连接，在所述定位块上设置有能与弹性定位体相顶触的定位凸部。
进一步改进，所述定位块由两片形状相同的定位片体组成，两片定位片体对称设置，且两片定位片体的一端将对应的转动块的一端夹于其中并通过 转轴能相对活动地连接在一起，所述两片定位片体的另一端将对应的左杆体或右杆体的端部夹于其中并通过片体轴销相互转动连接在一起，相应拉绳的一端绕过对应转动块的圆弧形侧壁与转轴连接在一起。
进一步改进，所述弹性定位体包括挤压弹簧、能与定位凸部相顶触的挤压杆，在所述弹性定位体上设置有两个放置相应挤压弹簧的弹簧腔，置于弹簧腔中的挤压弹簧的一端分别顶触在对应的弹簧腔底面中，而挤压弹簧的另一端分别与对应的挤压杆顶触在一起，与挤压弹簧相应位置的壳体侧壁上分别设置有限位腰形通孔，所述挤压杆穿置于对应的限位腰形通孔中，当所述护杆展开时，所述挤压杆能与定位块上的定位凸部支撑在一起，此时，对应一组的片体轴销、转轴、转动块轴销三点连线从上向下位于一条直线上，当所述护杆折叠时，所述挤压杆推动定位凸部使转轴解锁，所述定位块转动而使挤压杆与定位凸部相分离。
进一步改进，在左杆体下方的拉绳上连接有左拉绳弹簧，所述左拉绳弹簧的一端与左转动块上的拉绳外端相连接，所述左拉绳弹簧的另一端通过拉绳向下穿过左边床腿的内腔与相应底座中的传动机构相连接在一起，在右杆体下方的拉绳上连接有右拉绳弹簧，所述右拉绳弹簧的一端与右转动块上的拉绳外端相连接，所述右拉绳弹簧的另一端通过拉绳向下穿过右边床腿的内腔与相应底座中的传动机构相连接在一起；所述拉绳与折叠部相连接的最低端要低于拉绳伸入到对应床腿内腔中的伸入点位置。
与现有技术相比，本发明的优点在于：通过对上连杆与下连杆两端连接点的定义而构成四连杆机构，该四连杆机构具有驱动床腿倾斜的功能。下压折叠驱动装置使床体展开，在床体展开初期，床腿上端的展开幅度大于床腿下端的展开幅度，床腿向外侧倾斜，使得床体的上部围栏率先展开，继续下压折叠驱动装置，下连杆驱动传动机构进而与拉绳相联动实现对护杆的锁定，在此过程中，床腿下端继续展开至正常使用状态；上提折叠驱动装置，下连杆对传动机构失去驱动力，弹性定位体推动对应的转动部转动而使折叠部解锁，继续上提折叠驱动装置，使床体完全折叠。本发明通过简单的四连杆机构和传动机构实现一键打开、一键折叠床体，且该机构的零件简单、可靠易制造。在床体完全展开时，传动机构的传动辊顶触在下连杆的弧形端部的下弧面上，传动辊对下连杆起到锁定作用，避免架体拱起，而使整个底架平整。
附图说明
图1是本发明实施例的应用在儿童游戏床上的立体图；
图2是图1中一底座去除一半外壳后的立体图；
图3是图2中连杆与相应床腿、底座(局部)、折叠驱动装置相连接的结构示意图；
图4是图3中保留其中一组连杆并以该组连杆侧面为正面的正面投影图；
图5是图4中连杆与折叠驱动装置、底座、床腿移动到不同位置的结构示意图；
图6是图2中去除一半外壳的底座中剖去一半摆动块后的结构示意图；
图7是图2进行折叠后的立体图；
图8是图7中继续折叠至折叠完成后的立体图；
图9是图7中显示传动辊与弧形端部位置关系的结构示意图；
图10是图8中显示传动辊与弧形端部位置关系的结构示意图；
图11是图1中去除床腿及床腿上部连接结构后的俯视图；
图12是图11中换用第二种锁定机构时的俯视图；
图13是图11中沿A-A线的剖面图；
图14是图13中拉动部向上拉动解锁后的剖面图；
图15是图12中沿B-B线的剖面图；
图16是图15中按压解锁拉杆后拉动拉动部时的剖面图；
图17是图6中采用第二种传动机构的结构示意图；
图18是图6中采用第三种传动机构的结构示意图；
图19是图2中一护杆中部去除一半壳体后的立体图；
图20是图19中的护杆单独取出显示该护杆具体结构的立体图；
图21是图20的正面投影图；
图22是图21中传动机构放松拉绳时弹性定位体解锁转动部的结构示意图；
图23是图20的结构分解图；
图24是图14的结构分解图；
图25是图1中去除一条床腿后的立体图；
图26是图25的结构分解图；
图27是图26处于另一个角度的结构分解图；
图28是图27中连接座处于另一个角度的立体图；
图29是图26的进一步结构分解图。
本发明的较佳实施方式
以下结合附图实施例对本发明作进一步详细描述。
如图1至图29所示，本实施例的便携式儿童游戏床，包括四条床腿1和置于床底中部能折叠和展开床体的折叠驱动装置，在相邻两条床腿1之间的顶部分别设置有中部能折叠的护杆12，护杆12两端分别与对应的床腿1顶部活动相连接，在每条床腿1的底部设置有通过连杆与折叠驱动装置活动相连接的连接机构，连杆由上下排列的上连杆21和下连杆31组成，连接机构包括底座2、设置于底座2内腔中的传动机构，上连杆21的一端伸入到底座2的上部内腔22中并由上轴销221能转动地与底座2相连接，上连杆21的另一端由上转动轴销222与折叠驱动装置中的架体6转动相连接，下连杆31一端伸入到底座2的下部内腔23中由下轴销231与底座2转动相连接，且伸入到底座2下部内腔23中的下连杆端部与传动机构联动在一起，下轴销231位于上轴销221的下方与底座2转动相连接，下连杆31的另一端由下转动轴销232与架体6转动相连接。
第一种传动机构为摆动块3，摆动块3通过摆动轴37能摆动地设置于底 座2的下部内腔23中，下轴销231设置于摆动块3右上方位置的底座内腔中，在摆动块3上设置有能与下连杆端部相顶触而能推动摆动块3向左摆动的传动辊34以及能与拉绳4相连接的连接轴36，摆动轴37设置于下轴销231左下方的摆动块3下部位置上，与拉绳4相连接的连接轴36固定于摆动轴37的左边。摆动块3由两片摆动片组成，两片摆动片通过摆动片连接柱35固定在一起。
在床体折叠状态时，传动辊34位于摆动轴37的右边，见图10所示，传动辊34、连接轴36分别位于摆动块3的空腔中，位于底座内腔中的下连杆端部伸入到摆动块3的空腔中，伸入到摆动块3空腔中的下连杆端部呈弧形端部32，当儿童游戏床完全展开而使下连杆31的另一端向下移动至最低端时，下连杆31的弧形端部32的底端与传动辊34支撑在一起，当儿童游戏床逐渐收起而折叠时，下连杆31的弧形端部32的端面绕传动辊34远离传动辊轴心移动，直至架体6上移至最高端时，弧形端部32的一侧边与传动辊34支撑在一起。传动辊34由穿置连接在两片摆动片上的定位轴销33和能转动地套置在摆动块内腔中的定位轴销33上的传动轮341组成，传动轮341的侧壁能与弧面端部32相顶触；连接轴36的两端分别穿置固定于左右平行设置的两片摆动片上，拉绳4与套环相连接，而套环套置在连接轴36上。当儿童游戏床完全展开时，传动辊34顶触在下连杆的弧形端部的下弧面上，传动辊34对下连杆31起到锁定作用，避免架体拱起，而使整个底架平整。所述下 连杆的弧形端部呈椭圆形，当儿童游戏床完全展开时，所述传动辊经过椭圆形弧形端部的曲面而顶触在椭圆形弧形端部的下弧面上。
如图17所示，第二种传动机构包括第一摆动连杆301和第二摆动连杆302，第一摆动连杆301和第二摆动连杆302一端以″人″形折叠并通过活动销304能相对转动地连接在一起，第一摆动连杆301的另一端通过转动销与下连杆31的端部转动相连接，而第二摆动连杆302的另一端通过定位销轴与底座2活动连接在一起，伸入到底座2中的拉绳4与活动销304连接在一起。第一摆动连杆301由前杆片与后杆片组成，前杆片固定于支撑架303的一侧面上，后杆片固定于支撑架303的另一侧面上，第二摆动连杆302由前杆体和后杆体组成，前杆体的后侧壁贴合在前杆片的前侧壁上，后杆体的前侧壁贴合在后杆片的后侧壁上，活动销304将前杆片、后杆片、前杆体和后杆体的一端串在一起而活动连接在一起，前杆片和后杆片的另一端通过转动销与下连杆31的弧形端部32串置在一起而活动地连接在一起，前杆体和后杆体的的另一端通过定位销轴串置在一起而与底座2活动连接在一起。当儿童折叠床完全展开时，转动销位于活动销304与下轴销231连线的上方，从而锁定儿童折叠床。在展开过程中，下连杆31的端部向上抬起，带动第一摆动连杆301和第二摆动连杆302转动，活动销304向下运动，将拉绳4向下拉紧；反之，拉绳4被放松。当儿童折叠床完全展开时，转动销位于活动销304与下轴销231连线的上方，对下连杆31起到锁定作用，避免架体拱起，而使整 个底架平整。
如图18所示，第三种传动机构为摆块305，摆块305下部通过摆动轴37能摆动地设置于底座2的下部内腔23中，下轴销231设置于摆动轴37右上方位置的底座内腔上，在摆块305上设置有能与下连杆31的弧形端部32相顶触而能推动摆块305左右摆动的辊体340，拉绳4与位于下连杆端部侧面位置的辊体340相连接，在位于摆动轴37右边且位于下轴销231下方位置的底座内腔中设置有拉绳4的支撑轮306，与辊体340相连接的拉绳4绕过支撑轮306，再绕过摆动轴37而向上伸入至床腿1的内腔中。摆动轴37上能转动地套置有转动辊，拉绳4与套环相连接，套环套置于摆块305的辊体340上，且拉绳4绕过支撑轮306再绕过转动辊而向上伸入至床腿1的内腔中。辊体340与下连杆端部可以采用第一种传动机构相似的设计以获得锁定效果，图18中所示即为与第一种传动机构下连杆相似的结构及锁定时的顶触位置。结合本附图和第一种传动机构的具体结构即可得到相应结构，故不再详细描述。上连杆21上的上轴销221与上转动轴销222两点之间的距离要小于下连杆31上的下轴销231与下转动轴销232两点之间的距离。底座2的底部设置有方便床腿1来回移动的滚轮25。下部内腔23的底部设置有第三凹腔24，滚轮25位于第三凹腔24中。
折叠驱动装置包括相对于床腿1能上下移动的架体6，竖向固定在架体6的中部并从架体6的底面中部向下延伸出的导向杆61和能沿导向杆61上下 移动的滑动座7，与每条床腿活动相连接的上连杆21与下连杆31的另一端分别通过上转动轴销222与下转动轴销232与架体6对应位置转动相连接，滑动座7通过传动杆38与对应下连杆31活动相连接。传动杆38的下端通过下传动轴销224与滑动座7的相应侧面转动相连接，而传动杆38的上端通过上传动轴销223与下连杆31转动相连接，当儿童游戏床完全展开时，上传动轴销223位于上转动轴销222与下传动轴销224连线上，或，上传动轴销223位于上转动轴销222与下传动轴销224连线的上方或下方。下连杆31的另一端由下转动轴销232与架体6转动相连接，且下转动轴销232在架体6上的定位点位于虚拟点A的右斜上方且低于上转动轴销222高度的位置，虚拟点A是与上轴销221、上转动轴销222、下轴销231三点一起连接构成的平行四边形的第四点位置。下转动轴销232的定位点与虚拟点A的连线与水平线之间的夹角a为45°。
在架体6上还设置有当床体完全打开后能保持打开状态的锁定机构；锁定机构包括解锁拉杆64和锁定片，解锁拉杆64能上下移动地置于导向杆61的内腔中，架体6的中心设置上下贯穿的竖向通孔62，导向杆61穿置固定于架体6的竖向通孔62中，导向杆61的顶面与架体顶面相平齐，而导向杆61的下端从架体6的底面向下延伸出，在架体6的顶面上设置有解锁拉杆64的解锁结构，锁定片位于解锁拉杆64的内腔中，当折叠驱动装置向下移动至最低位置而完全展开床体时，锁定片能经过解锁拉杆64与导向杆61的对应 侧面中伸出而与滑动座7底面相支撑而锁定，当床体需要折叠而解锁时通过解锁结构带动锁定片缩回到解锁拉杆64的内腔中而与滑动座7脱离，能使滑动座7向下移动而解锁。
锁定片位于解锁拉杆64的下部内腔中，锁定片由至少两片定位片63组成，每片定位片63的下部设置有用于穿插横轴销66的连接孔，在连接孔上方的定位片63上设置有斜条形孔631，定位片63象折叠扇一样折叠在一起，定位片下部通过横轴销66经连接孔穿插在一起而使定位片63能象折叠扇一样左右展开与折叠，横轴销66的左右两端分别固定于导向杆61下部的左右对应侧面上，在斜条形孔631中穿置有能在斜条形孔631中上下移动而展开和折叠定位片63的折叠拉轴65，折叠拉轴65的左右两端以径向固定于解锁拉杆64对应的左右侧面上，在解锁拉杆64上设置有定位片63左右展开时能伸出解锁拉杆侧面的缺口641，而与缺口641相对应位置的导向杆61的左右侧面上亦分别设置有定位片63展开时经过缺口641再伸出导向杆侧面的通腔611，伸出通腔611的定位片63顶面能与滑动座7底面支撑在一起，位于解锁拉杆中部内腔上部的解锁拉杆64左右侧面上分别开有竖向的腰形孔642，在腰形孔642中径向穿置有固定轴销68，固定轴销68左端穿过解锁拉杆左侧面与导向杆61对应左侧面固定在一起，固定轴销68右端穿过解锁拉杆右侧面与导向杆61对应右侧面固定在一起，位于缺口641上方的解锁拉杆内腔中设置有复回弹簧71，复回弹簧71的底部与缺口641上方的解锁拉杆内腔 中的支撑部相支撑，而复回弹簧71的上端能与固定轴销68相顶触而支撑在一起，腰形孔642的上下孔距L要大于折叠拉轴65上下移动而使定位片63完全折叠后的最大距离K。解锁结构包括拉环67、拉绳体，当选择为拉环时，拉环的两端与连接于解锁拉杆64顶面上的能转动的拉动轴连接在一起。
或者，架体6的顶部连接有能向上拉动架体6的拉部671，解锁结构为解锁拉杆伸出竖向通孔62的按压伸出端或解锁拉杆顶面与竖向通孔62顶面相平齐的按压平齐端，锁定片位于解锁拉杆的中部内腔中，锁定片由至少两片定位片63组成，每片定位片63的上部设置有用于穿插横轴销66的连接孔，在连接孔下方的定位片63上设置有斜条状孔632，定位片63象折叠扇一样折叠在一起，定位片上部通过横轴销66经连接孔穿插在一起而使定位片63能象折叠扇一样左右展开与折叠，横轴销66的左右两端分别固定于导向杆61上部的左右对应侧面上，在斜条状孔632中穿置有能在斜条状孔632中上下移动而展开和折叠定位片63的折叠拉轴65，折叠拉轴65的左右两端以径向固定于解锁拉杆64对应的左右侧面上，在解锁拉杆64上设置有定位片63左右展开时能伸出解锁拉杆侧面的缺口641，而与缺口641相对应位置的导向杆61的左右侧面上亦分别设置有定位片63展开时经过缺口641再伸出导向杆侧面的通腔611，伸出通腔611的定位片63的卡扣面能与滑动座7底面卡扣在一起，位于解锁拉杆中部内腔上部的解锁拉杆64左右侧面上分别开有竖向的腰形孔642，横轴销66径向穿置在腰形孔642中，位于通腔611下方 的导向杆内腔中设置有复回弹簧71，复回弹簧71的上端与解锁拉杆64相顶触，而复回弹簧71的下端与位于导向杆内腔中的支撑杆69相支撑，腰形孔642的上下孔距L要大于折叠拉轴65上下移动而使定位片63完全折叠后的最大距离K，按压解锁拉杆64顶部后带动锁定片缩回到解锁拉杆64的内腔中而与滑动座7脱离，向上拉动的拉部671能使滑动座7向下移动而解锁。
护杆12包括能与对应床腿1顶部活动相连接的左杆体12a与右杆体12b以及位于左杆体12a与右杆体12b之间且能折叠左杆体12a与右杆体12b的折叠部，折叠部包括壳体8、位于壳体8内腔中部的弹性定位体9以及位于弹性定位体9左侧的左转动部和位于弹性定位体9右侧的右转动部，左杆体12a的右部伸入到壳体的左部内腔中与壳体能转动地连接在一起，左杆体12a的右端与左转动部传动相连接，左转动部与左侧床腿底座中延伸上来的拉绳4相连接，右杆体12b的左部伸入到壳体右部内腔中与壳体能转动地连接在一起，右杆体12b的左端与右转动部传动相连接，右转动部与右侧床腿底座中延伸上来的拉绳4相连接。
每个转动部包括转动块81和定位块82，转动块81的中部通过转动块轴销812转动地连接在对应壳体内腔中，转动块81的一端与定位块82的一端活动相连接，定位块82的另一端与对应左杆体12a或右杆体12b的端部转动相连接，在定位块82上设置有能与弹性定位体9相顶触的定位凸部821。
定位块82由两片形状相同的定位片体组成，两片定位片体对称设置，且 两片定位片体的一端将对应的转动块81的一端夹于其中并通过转轴84能相对活动地连接在一起，两片定位片体的另一端将对应的左杆体12a或右杆体12b的端部夹于其中并通过片体轴销813相互转动连接在一起，相应拉绳4的一端绕过对应转动块81的圆弧形侧壁与转轴84连接在一起。
弹性定位体9包括挤压弹簧91、能与定位凸部821相顶触的挤压杆92，在弹性定位体9上设置有两个放置相应挤压弹簧91的弹簧腔93，置于弹簧腔93中的挤压弹簧91的一端分别顶触在对应的弹簧腔93底面中，而挤压弹簧91的另一端分别与对应的挤压杆92顶触在一起，与挤压弹簧91相应位置的壳体侧壁上分别设置有限位腰形通孔83，挤压杆92穿置于对应的限位腰形通孔83中，当护杆12展开时，挤压杆92能与定位块82上的定位凸部821支撑在一起，此时，对应一组的片体轴销813、转轴84、转动块轴销812三点连线从上向下位于一条直线上，当护杆12折叠时，挤压杆92推动定位凸部821使转轴84解锁，定位块82转动而使挤压杆92与定位凸部821相分离。与弹簧腔93对应的弹性定位体9的侧壁上设置有能容纳相应挤压杆92的侧壁缺口94。在转动块81的圆弧形侧壁上间隔设置有能卡入相应拉绳4的钩状凸起811。在转动块81的圆弧形侧面上设置有能嵌入对应拉绳4的限位槽814，对应拉绳4的绳体位于限位槽814中。
在左杆体12a下方的拉绳4上连接有左拉绳弹簧41，左拉绳弹簧41的一端与左转动块上的拉绳4外端相连接，左拉绳弹簧41的另一端通过拉绳向 下穿过左边床腿1的内腔与相应底座2中的传动机构相连接在一起，在右杆体12b下方的拉绳4上连接有右拉绳弹簧，右拉绳弹簧的一端与右转动块上的拉绳4外端相连接，右拉绳弹簧的另一端通过拉绳向下穿过右边床腿1的内腔与相应底座2中的传动机构相连接在一起；拉绳4与折叠部相连接的最低端B要低于拉绳4伸入到对应床腿内腔中的伸入点C位置。钢丝绳倾斜设置，使拉绳4对折叠部具有向上的提升作用，这样使位于护杆中部的折叠部更容易打开，并且拉绳4对折叠部有一个向上的分力，具有提升作用。
床腿1为中空结构，拉绳4伸入床腿1并从床腿1上部侧壁的开口中伸出而与护杆12中部相连接。在儿童游戏床完全展开时，所述上连杆21与下连杆31之间的夹角为1.5～4°。在架体6上设置有能相对架体6转动的辅助支撑杆601，辅助支撑杆601呈L形，当床腿1完全打开时，L形的辅助支撑杆601的端部顶触在地面上。拉绳4的另一端经过床腿内腔并在床腿上部的内腔中穿出与折叠部连接在一起。传动机构通过拉绳4能与儿童游戏床顶部的护杆12中部的折叠部相连接，弧形端部32为椭圆形端部。
在儿童游戏床的床腿顶部设置有连接座5，连接座5的俯视投影呈″L″形，在连接座5左右两边上设置有能与左护杆和右护杆对应端部伸入而活动相连接的左凹槽51和右凹槽52，左护杆能在左凹槽51中上下摆动，而右护杆能在右凹槽52中上下摆动，在位于连接座内腔位置的床腿1的侧壁上开有两个等高、间隔设置的侧壁通孔11，在左侧壁通孔上卡扣有左导线块53，在 左导线块53的顶部设置有能活动地嵌入从左凹槽51中穿入再穿过左侧壁通孔而伸入床腿内腔至床腿底部的拉绳4的左引线槽55，在右侧壁通孔上卡扣有右导线块54，在右导线块54的顶部设置有能活动地嵌入从右凹槽52中穿入再穿过左侧壁通孔而伸入床腿内腔至床腿底部的拉绳4的右引线槽。左导线块53的左右两面上凸设有能与左凹槽51位置的连接座5相应内壁卡槽56相卡扣固定的左凸耳57，右导线块54的左右两面上凸设有能与右凹槽52位置的连接座5相应内壁卡槽56相卡扣固定的右凸耳。在连接座5的内腔折角处竖向设置有套插腔，床腿1的顶部穿插于套插腔中与连接座5固定在一起。
左护杆通过左转动轴与连接座5转动相连接，右护杆通过右转动轴与连接座5转动相连接。在连接座5的折角内外侧面上设置有能通过螺栓横向穿过或通过螺钉横向插入到连接座内腔中能与床腿顶部增强固定牢度的螺栓孔或螺孔。左引线槽55的槽底面呈圆弧形的圆弧槽，右引线槽的槽底面亦呈圆弧形的圆弧槽。连接座5是由塑料一次性注塑而成的整体结构。
工业实用性
工作原理：在儿童游戏床处于折叠状态时，按压折叠驱动装置而向下移动，由上、下连杆构成的四连杆机构驱动床腿向外侧移动过程中逐渐使床腿向外侧倾斜，形成床腿顶部展开快而床腿底部展开慢的倾斜式展开，下连杆的弧形端部32推动传动辊34使摆动块3以逆时针方向摆动，带动连接轴36向下作弧形移动而使拉绳4向下拉动，驱动护杆锁定，当顶部完全展开后， 折叠驱动装置继续向下移动而使连杆继续推动床腿底部向外展开，直至床腿底部完全展开至正常使用状态，当折叠驱动装置向上拉起儿童游戏床体时，即回复上述的步骤。
下面结合附图具体描述整个展开折叠过程：
本发明展开过程如图8→图7→图1所示。
展开过程：本折叠床处于折叠状态时，折叠驱动装置处于其位移过程中所经过位置的最高处，上连杆21向上旋转至竖向位置，并且所有护杆的左右杆体向下旋转使护杆折叠，如图8所示。下压折叠驱动装置，折叠驱动装置带动上连杆21和下连杆31转动，上连杆21与下连杆31转动时，带动底座2和床腿1向外侧(远离中心)移动的同时逐渐向外侧倾斜，并且同步带动左右杆体转动(如图5所示的H1位置)；至上连杆21和下连杆31处于大致平行状态，此时床腿1处于最大倾斜角度(如图5所示的H2位置)；继续下压折叠驱动装置，上连杆21与下连杆31转动时带动底座2和床腿1向外侧移动的同时逐渐向内侧倾斜，此时床腿1向外拉拽对应床腿1顶部的连接座5而使连接座5相互远离，驱动护杆12展开至接近于水平的状态，如图7所示；继续下压折叠驱动装置，折叠驱动装置带动上连杆21和下连杆31转动，下连杆31的弧形端部32推动传动辊34使摆动块3以逆时针方向摆动，如图9所示，带动连接轴36向下作弧形移动而使拉绳4向下拉动，驱动对应护杆12展开至水平使用状态，并且锁定折叠部；继续下压折叠驱动装置至儿童折叠床完 全打开，上连杆21与下连杆31转动时带动底座2和床腿1向外侧移动的同时逐渐向内侧倾斜至竖向状态，如图1所示，在此过程中，连接轴36继续向下作弧形移动而使拉绳4向下拉动，使拉绳弹簧处于受力状态，保证折叠部一直处于恒力状态。拉绳弹簧起到张紧作用，此处如不使用拉绳弹簧，则对拉绳4的制造加工提出了很高要求，一般生产工艺很难保证拉绳4长度的加工精度，连接轴36至转轴84之间拉绳4的长度略长，导致无法及时拉动折叠部的转动部，使折叠部不在锁定状态；连接轴36至转轴84之间拉绳4的长度略短，底座2内腔中能拉动拉绳4的传动机构使拉绳受力，会超过拉绳的最大负载力而断裂。且该拉绳弹簧的弹性力远远大于弹性定位体9上的挤压弹簧91的弹性力，当底座2内腔中能拉动拉绳4的传动机构驱动折叠部锁定的过程中，首先克服护杆的重力使护杆展开，同时克服挤压弹簧91的弹性阻力，拉绳4拉紧对应的转动部，驱动转动部使对应一组的片体轴销813、转轴84、转动块轴销812三点连线从上向下位于一条直线上，使折叠部锁定，之后，传动机构继续驱动拉绳4使拉簧处于张紧状态。锁定片经过解锁拉杆64与导向杆61的对应侧面中伸出而与滑动座7底面相支撑而锁定，至此本折叠床处于完全打开与锁定状态。
本发明折叠过程如图1→图7→图8所示。
折叠过程：本折叠床处于展开状态时，如图1所示；可以仅由单手将折叠驱动装置上的拉环67上提，通过解锁机构对折叠驱动装置解锁，以允许折 叠驱动装置继续在向上的方向上移动；继续将拉环67上提，折叠驱动装置带动上连杆21和下连杆31转动，上连杆21与下连杆31转动时带动底座2和床腿1向内侧移动的同时逐渐向外侧倾斜；下连杆31的弧形端部32的端面绕传动辊34远离传动辊轴心移动，而使拉绳4逐渐失去拉力，折叠部中的弹性定位体9推动对应的转动部转动而使折叠部解锁，使护杆折叠，如图7所示；继续将拉环67上提，护杆带动对应的床腿1继续往折叠驱动装置靠拢，护杆12的左右杆体向下旋转至竖向位置，至此本折叠床处于折叠状态，如图8所示。
通过巧妙设计上连杆21与下连杆31的连接位置而构成的四连杆机构，使本折叠床在展开时，床腿1能产生先向外倾斜再回复竖直的运动轨迹，具体可分为两段展开过程，在床体刚展开时，床腿上端的展开幅度大于床腿下端的展开幅度，床腿向外侧倾斜，使得床体上部的护杆能率先到位，从而能预先定位床体的护杆；在床体继续展开的过程中，床腿下端继续展开至床腿上端的幅度，床腿重新回复到竖直的正常使用状态，实现床体的完整展开。该机构的设计有助于护杆的展开，进而实现单人操作该折叠床的打开、收拢。
显而易见的是，本发明具有显著的有利特征，即一步操作，其下推或降低折叠驱动装置使床体打开，而上拉或提升折叠驱动装置使床体折叠。在打开和折叠床体时，折叠驱动装置向任一方向的运动均可同时引起床体的所有其他组件和结构的运动。

Claims (14)

  1. 一种便携式儿童游戏床，包括四条床腿(1)和置于床底中部能折叠和展开床体的折叠驱动装置，在相邻两条床腿(1)之间的顶部分别设置有中部能折叠的护杆(12)，所述护杆(12)两端分别与对应的床腿(1)顶部活动相连接，在每条床腿(1)的底部设置有通过连杆与折叠驱动装置活动相连接的连接机构，所述连杆由上下排列的上连杆(21)和下连杆(31)组成，其特征在于：所述连接机构包括底座(2)、设置于底座(2)内腔中的传动机构，所述上连杆(21)的一端伸入到底座(2)的上部内腔(22)中并由上轴销(221)能转动地与底座(2)相连接，所述上连杆(21)的另一端由上转动轴销(222)与折叠驱动装置中的架体(6)转动相连接，所述下连杆(31)一端伸入到底座(2)的下部内腔(23)中由下轴销(231)与底座(2)转动相连接，且伸入到底座(2)下部内腔(23)中的下连杆端部与传动机构联动在一起，所述下轴销(231)位于上轴销(221)的下方与底座(2)转动相连接，所述下连杆(31)的另一端由下转动轴销(232)与架体(6)转动相连接。
  2. 根据权利要求1所述的便携式儿童游戏床，其特征在于：所述传动机构为摆动块(3)，所述摆动块(3)通过摆动轴(37)能摆动地设置于底座(2)的下部内腔(23)中，所述下轴销(231)设置于摆动块(3)右上方位置的底座内腔中，在所述摆动块(3)上设置有能与下连杆端部相顶触而能推动摆动块(3)向左摆动的传动辊(34)以及能与拉绳(4)相连接的连接轴(36)，所述摆动轴(37)设置于下 轴销(231)左下方的摆动块(3)下部位置上，与拉绳(4)相连接的连接轴(36)固定于摆动轴(37)的左边。
  3. 根据权利要求1所述的便携式儿童游戏床，其特征在于：所述传动机构包括第一摆动连杆(301)和第二摆动连杆(302)，所述第一摆动连杆(301)和第二摆动连杆(302)一端以″人″形折叠并通过活动销(304)能相对转动地连接在一起，所述第一摆动连杆(301)的另一端通过转动销与下连杆(31)的端部转动相连接，而所述第二摆动连杆(302)的另一端通过定位销轴与底座(2)活动连接在一起，伸入到底座(2)中的拉绳(4)与活动销(304)连接在一起。
  4. 根据权利要求1所述的便携式儿童游戏床，其特征在于：所述传动机构为摆块(305)，所述摆块(305)下部通过摆动轴(37)能摆动地设置于底座(2)的下部内腔(23)中，所述下轴销(231)设置于摆动轴(37)右上方位置的底座内腔上，在摆块(305)上设置有能与下连杆(31)的弧形端部(32)相顶触而能推动摆块(305)左右摆动的辊体(340)，所述拉绳(4)与位于下连杆端部侧面位置的辊体(340)相连接，在位于摆动轴(37)右边且位于下轴销(231)下方位置的底座内腔中设置有拉绳(4)的支撑轮(306)，与辊体(340)相连接的拉绳(4)绕过支撑轮(306)，再绕过摆动轴(37)而向上伸入至床腿(1)的内腔中。
  5. 根据权利要求1至4中任一所述的便携式儿童游戏床，其特征在于：所述折叠驱动装置包括相对于床腿(1)能上下移动的架体(6)，竖向固定在架体(6)的中部并从架体(6)的底面中部向下延伸出的导向杆(61)和能沿导向杆(61) 上下移动的滑动座(7)，与每条床腿活动相连接的上连杆(21)与下连杆(31)的另一端分别通过上转动轴销(222)与下转动轴销(232)与架体(6)对应位置转动相连接，所述滑动座(7)通过传动杆(38)与对应下连杆(31)活动相连接。
  6. 根据权利要求5所述的便携式儿童游戏床，其特征在于：所述传动杆(38)的下端通过下传动轴销(224)与滑动座(7)的相应侧面转动相连接，而所述传动杆(38)的上端通过上传动轴销(223)与下连杆(31)转动相连接。
  7. 根据权利要求6所述的便携式儿童游戏床，其特征在于：在所述架体(6)上还设置有当床体完全打开后能保持打开状态的锁定机构；所述锁定机构包括解锁拉杆(64)和锁定片，所述解锁拉杆(64)能上下移动地置于导向杆(61)的内腔中，所述架体(6)的中心设置上下贯穿的竖向通孔(62)，所述导向杆(61)穿置固定于架体(6)的竖向通孔(62)中，所述导向杆(61)的顶面与架体顶面相平齐，而导向杆(61)的下端从架体(6)的底面向下延伸出，在所述架体(6)的顶面上设置有解锁拉杆(64)的解锁结构，所述锁定片位于解锁拉杆(64)的内腔中，当所述折叠驱动装置向下移动至最低位置而完全展开床体时，所述锁定片能经过解锁拉杆(64)与导向杆(61)的对应侧面中伸出而与滑动座(7)底面相支撑而锁定，当床体需要折叠而解锁时通过解锁结构带动锁定片缩回到解锁拉杆(64)的内腔中而与滑动座(7)脱离，能使滑动座(7)向下移动而解锁。
  8. 根据权利要求7所述的便携式儿童游戏床，其特征在于：所述锁定片位于解锁拉杆(64)的下部内腔中，锁定片由至少两片定位片(63)组成，每片定 位片(63)的下部设置有用于穿插横轴销(66)的连接孔，在连接孔上方的定位片(63)上设置有斜条形孔(631)，所述定位片(63)象折叠扇一样折叠在一起，定位片下部通过横轴销(66)经连接孔穿插在一起而使定位片(63)能象折叠扇一样左右展开与折叠，所述横轴销(66)的左右两端分别固定于导向杆(61)下部的左右对应侧面上，在斜条形孔(631)中穿置有能在斜条形孔(631)中上下移动而展开和折叠定位片(63)的折叠拉轴(65)，所述折叠拉轴(65)的左右两端以径向固定于解锁拉杆(64)对应的左右侧面上，在所述解锁拉杆(64)上设置有定位片(63)左右展开时能伸出解锁拉杆侧面的缺口(641)，而与缺口(641)相对应位置的导向杆(61)的左右侧面上亦分别设置有定位片(63)展开时经过缺口(641)再伸出导向杆侧面的通腔(611)，伸出通腔(611)的定位片(63)顶面能与滑动座(7)底面支撑在一起，位于解锁拉杆中部内腔上部的解锁拉杆(64)左右侧面上分别开有竖向的腰形孔(642)，在腰形孔(642)中径向穿置有固定轴销(68)，所述固定轴销(68)左端穿过解锁拉杆左侧面与导向杆(61)对应左侧面固定在一起，所述固定轴销(68)右端穿过解锁拉杆右侧面与导向杆(61)对应右侧面固定在一起，位于缺口(641)上方的解锁拉杆内腔中设置有复回弹簧(71)，所述复回弹簧(71)的底部与缺口(641)上方的解锁拉杆内腔中的支撑部相支撑，而所述复回弹簧(71)的上端能与固定轴销(68)相顶触而支撑在一起，所述腰形孔(642)的上下孔距(L)要大于折叠拉轴(65)上下移动而使定位片(63)完全折叠后的最大距离(K)。
  9. 根据权利要求7所述的便携式儿童游戏床，其特征在于：所述架体(6)的顶部连接有能向上拉动架体(6)的拉部(671)，所述解锁结构为解锁拉杆伸出竖向通孔(62)的按压伸出端或解锁拉杆顶面与竖向通孔(62)顶面相平齐的按压平齐端，所述锁定片位于解锁拉杆的中部内腔中，锁定片由至少两片定位片(63)组成，每片定位片(63)的上部设置有用于穿插横轴销(66)的连接孔，在连接孔下方的定位片(63)上设置有斜条状孔(632)，所述定位片(63)象折叠扇一样折叠在一起，定位片上部通过横轴销(66)经连接孔穿插在一起而使定位片(63)能象折叠扇一样左右展开与折叠，所述横轴销(66)的左右两端分别固定于导向杆(61)上部的左右对应侧面上，在斜条状孔(632)中穿置有能在斜条状孔(632)中上下移动而展开和折叠定位片(63)的折叠拉轴(65)，所述折叠拉轴(65)的左右两端以径向固定于解锁拉杆(64)对应的左右侧面上，在解锁拉杆(64)上设置有定位片(63)左右展开时能伸出解锁拉杆侧面的缺口(641)，而与缺口(641)相对应位置的导向杆(61)的左右侧面上亦分别设置有定位片(63)展开时经过缺口(641)再伸出导向杆侧面的通腔(611)，伸出通腔(611)的定位片(63)的卡扣面能与滑动座(7)底面卡扣在一起，位于解锁拉杆中部内腔上部的解锁拉杆(64)左右侧面上分别开有竖向的腰形孔(642)，所述横轴销(66)径向穿置在腰形孔(642)中，位于通腔(611)下方的导向杆内腔中设置有复回弹簧(71)，所述复回弹簧(71)的上端与解锁拉杆(64)相顶触，而所述复回弹簧(71)的下端与位于导向杆内腔中的支撑杆(69)相支撑，所述腰形孔(642)的上下孔距(L)要大于 折叠拉轴(65)上下移动而使定位片(63)完全折叠后的最大距离(K)，按压解锁拉杆(64)顶部后带动锁定片缩回到解锁拉杆(64)的内腔中而与滑动座(7)脱离，向上拉动的拉部(671)能使滑动座(7)向下移动而解锁。
  10. 根据权利要求1至4中任一所述的便携式儿童游戏床，其特征在于：所述护杆(12)包括能与对应床腿(1)顶部活动相连接的左杆体(12a)与右杆体(12b)以及位于左杆体(12a)与右杆体(12b)之间且能折叠左杆体(12a)与右杆体(12b)的折叠部，所述折叠部包括壳体(8)、位于壳体(8)内腔中部的弹性定位体(9)以及位于弹性定位体(9)左侧的左转动部和位于弹性定位体(9)右侧的右转动部，所述左杆体(12a)的右部伸入到壳体的左部内腔中与壳体能转动地连接在一起，所述左杆体(12a)的右端与左转动部传动相连接，所述左转动部与左侧床腿底座中延伸上来的拉绳(4)相连接，所述右杆体(12b)的左部伸入到壳体右部内腔中与壳体能转动地连接在一起，所述右杆体(12b)的左端与右转动部传动相连接，所述右转动部与右侧床腿底座中延伸上来的拉绳(4)相连接。
  11. 根据权利要求10所述的便携式儿童游戏床，其特征在于：每个转动部包括转动块(81)和定位块(82)，所述转动块(81)的中部通过转动块轴销(812)转动地连接在对应壳体内腔中，所述转动块(81)的一端与定位块(82)的一端活动相连接，所述定位块(82)的另一端与对应左杆体(12a)或右杆体(12b)的端部转动相连接，在所述定位块(82)上设置有能与弹性定位体(9)相顶触的定位凸部(821)。
  12. 根据权利要求11所述的便携式儿童游戏床，其特征在于：所述定位块(82)由两片形状相同的定位片体组成，两片定位片体对称设置，且两片定位片体的一端将对应的转动块(81)的一端夹于其中并通过转轴(84)能相对活动地连接在一起，所述两片定位片体的另一端将对应的左杆体(12a)或右杆体(12b)的端部夹于其中并通过片体轴销(813)相互转动连接在一起，相应拉绳(4)的一端绕过对应转动块(81)的圆弧形侧壁与转轴(84)连接在一起。
  13. 根据权利要求11所述的便携式儿童游戏床，其特征在于：所述弹性定位体(9)包括挤压弹簧(91)、能与定位凸部(821)相顶触的挤压杆(92)，在所述弹性定位体(9)上设置有两个放置相应挤压弹簧(91)的弹簧腔(93)，置于弹簧腔(93)中的挤压弹簧(91)的一端分别顶触在对应的弹簧腔(93)底面中，而挤压弹簧(91)的另一端分别与对应的挤压杆(92)顶触在一起，与挤压弹簧(91)相应位置的壳体侧壁上分别设置有限位腰形通孔(83)，所述挤压杆(92)穿置于对应的限位腰形通孔(83)中，当所述护杆(12)展开时，所述挤压杆(92)能与定位块(82)上的定位凸部(821)支撑在一起，此时，对应一组的片体轴销(813)、转轴(84)、转动块轴销(812)三点连线从上向下位于一条直线上，当所述护杆(12)折叠时，所述挤压杆(92)推动定位凸部(821)使转轴(84)解锁，所述定位块(82)转动而使挤压杆(92)与定位凸部(821)相分离。
  14. 根据权利要求13所述的便携式儿童游戏床，其特征在于：在左杆体(12a)下方的拉绳(4)上连接有左拉绳弹簧(41)，所述左拉绳弹簧(41)的一端与 左转动块上的拉绳(4)外端相连接，所述左拉绳弹簧(41)的另一端通过拉绳向下穿过左边床腿(1)的内腔与相应底座(2)中的传动机构相连接在一起，在右杆体(12b)下方的拉绳(4)上连接有右拉绳弹簧，所述右拉绳弹簧的一端与右转动块上的拉绳(4)外端相连接，所述右拉绳弹簧的另一端通过拉绳向下穿过右边床腿(1)的内腔与相应底座(2)中的传动机构相连接在一起；所述拉绳(4)与折叠部相连接的最低端(B)要低于拉绳(4)伸入到对应床腿内腔中的伸入点(C)位置。
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