JPH022351Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a chair-type pine surge device in which a pine surge roller is driven vertically within the seat of a chair.

[Technical background of the invention and its problems]

In general, a so-called chair-type pine-surge device, which provides pine-surge rollers movable within the back of a chair, is known as a pine-surge device that performs pine-surge on a user's body from the waist to the shoulders. In such a chair-type pine surge device, if the pine surge roller applies uniform pressure to the entire back of the user who is leaning on the back, the lumbar region covered with thick muscles will not receive a strong pine surge. The disadvantage is that you don't feel any force, and other parts of your body that have little muscle feel pain.

In order to eliminate such drawbacks, a pine surge machine disclosed in Japanese Utility Model Publication No. 57-33864 is known. In other words, this pine surge machine runs a support bracket to which a massaging ball (pine surge roller) is attached along a support pillar, and also extends the part of the support that corresponds to the user's waist forward to perform the above-mentioned pine surge. The rollers are able to press the user's lower back more strongly than other parts.

However, with such a structure, the pressing force of the pine surge roller on the waist and other parts of the user is determined by the bent shape of the support. Therefore, since the user cannot change the pressing force applied to the lower back by the pine surgery roller according to his/her preference, there is a drawback that the user cannot receive pine surgery in a comfortable state.

[Purpose of invention]

The object of this invention is to provide a chair-type pine surgery device that can arbitrarily change the pressing force applied to the user's lower back by the pine surgery roller.

[Summary of the idea]

This idea involves screwing a nut body onto a screw shaft that is installed along the vertical direction on the back of the chair and is driven to rotate, and a guide rod whose upper end is pivotally connected to the back of the chair is provided almost parallel to the screw shaft. A frame to which a roller is rotatably attached is provided so as to be freely movable along the guide rod, and the guide rod can be rotated to any inclination angle by a drive mechanism, and one end is attached to the nut body. By providing a connecting body with the other end pivotally connected to the frame, the frame is displaced by the rotation of the guide rod, and the pine surge roller provided on this frame can freely apply the force to press the user. There is a chair-type pine surge device that can be set up.

[Example of idea]

An embodiment of this invention will be described below with reference to the drawings. In Figure 1, 1 is the seat of the chair, 2 is the back, and 3
is a support. Both ends of the support body 3 in the width direction are attached and fixed to the inner surfaces of a pair of armrest bodies 4 (only one of which is shown). One end of a mounting piece 6 is fixed to both sides of the rear end of the seat frame 5 forming the seat 1, and the other end of the mounting piece 6 is pivoted to the rear end of the support 3 by a support shaft 7. It is worn. One end of a first link 8 (only one of which is shown) is pivotally attached to each side of the front end of the support body 3 in the width direction by a first support shaft 9 . One end of a second link 10 is pivotally connected to the other end of the first link 8 by a second support shaft 11 . One end of the second link 10 is bent, and this bent portion is pivotally connected to the front end of the seat frame 5 by a third support shaft 12.
A third link 1 is provided at the other end of the second link 10.
3 is pivotally connected by a fourth support shaft 14. Further, one end of a fourth link 15 is pivotally attached to the front end of the seat frame 5 by a fifth support shaft 16. At the other end of this fourth link 15, a fifth
One end of the link 17 is pivotally connected by a sixth support shaft 18, and the middle part is pivotally connected to the middle part of the third link 13 by a seventh support shaft 19. Eighth and ninth support shafts 2 are provided at the other end of the fifth link 17 and the other end of the third link 13.
A footrest 22 is pivotally mounted by 0 and 21.
When the seat frame 5 is in the state shown by the solid line in FIG. 1, the link mechanism configured in this way is in a state where it is contracted downward on the front end side of the seat frame 5, and from this state, the seat frame 5 is in the state shown by the chain line. When rotating in the direction of the arrow with the support shaft 7 at the rear end as a fulcrum,
The footrest 22 extends in conjunction with this rotation, so that the footrest 22 projects horizontally above the front of the seat frame 5.

A lower end portion of a back frame 25 forming the back portion 2 is pivotally attached to the rear end portion of the seat frame 5 by a support shaft 26. A first bracket 27 is provided at the lower end of the back frame 25, and a cylinder 29 of a gas spring 28 is pivotally attached to the first bracket 27. A second bracket 30 is provided on the lower surface of the front end side of the seat frame 5, and the second bracket 30 has a connecting plate 32 fixed to the piston rod 31 of the gas spring 28, as shown in FIG. is pivotally connected by a support shaft 33. An end portion of a push rod 34 projects from the tip of the piston rod 31, and an operating lever 35, one end of which is pivotally connected to the support shaft 33, is opposed to this projecting end. This operating lever 3
5 is biased by a spring 36a in the direction indicated by the arrow toward the push rod 34. One end of a wire 37 inserted through a flexible tube 36 is coupled to the other end of the operating lever 35, and the flexible tube 3
One end of the piston rod 6 is fixedly attached to a mounting plate 38 attached to the piston rod 34. This flexible tube 3
The other end of the armrest 6 is introduced into one of the armrests 4, and the other end is fixed to a mounting plate 39 attached to the inside of the armrest 4. The other end of the wire 37 is fixed to one end of an L-shaped interlocking lever 41 whose midway portion is pivotally supported by a support shaft 40 on the mounting plate 39 . An engagement groove 42 is formed at the other end of the interlocking lever 41 . A bushing 4 is provided on the side wall of the armrest body 4 facing the other end of the interlocking lever 41.
3 is provided through the bushing 43, and a shaft-shaped operation button 44 is slidably inserted into this bushing 43. A split groove 45 is formed at the end of the operation button 44 that projects into the armrest body 4. Further, a locking shaft 46 that crosses the split groove 45 is provided at the end of the operation button 44, and the engagement groove 42 of the interlocking lever 41 engages with this locking shaft 46. Furthermore, the interlocking lever 41 is biased in the arrow stop direction by a spring 47 provided between this one end and the mounting plate 39. Therefore, when the operation button 44 is pushed in and the interlocking lever 41 is rotated in the direction of the arrow, the flexible tube 3
The wire 37 inserted through the gas spring 28 is pulled and the operating lever 35 rotates in the direction of the arrow.
The piston rod 31 of the gas spring 28 presses the push rod 34 of the cylinder 29.
It operates in the direction that it protrudes from. In other words, the length between the cylinder 29 and the piston rod 31 becomes larger. As a result, the back portion 2 to which the cylinder 29 is connected rotates in the rising direction. In addition, when rotating the back 2 in the direction of reclining the back 2, if the user leans on the back 2 while pressing the operation button 44, the piston rod 31 of the gas spring 28 moves into the cylinder 2.
Go inside 9. In other words, the back portion 2 is held at an arbitrary inclination angle with respect to the seat portion 1 by the gas spring 28. In addition, spring 3
6a and 47 are for reducing the operating force when pressing the operating button 44.

On the other hand, at the upper and lower ends of the back frame 25 of the back section 2, a lower substrate 52 and an upper substrate 53 are respectively provided along the width direction, as shown in FIG. A screw shaft 54 is provided on these substrates 52 and 53 so as to be rotatably supported at the upper and lower ends thereof. This screw shaft 5
Guide rods 57 are provided on both sides of the screw shaft 54, the upper end of which is pivotally connected to a bracket 55 provided on the upper substrate 53 by a support shaft 56, substantially parallel to the screw shaft 54. The upper end of the guide rod 57 forms a bent portion 58 bent toward the front side of the back portion 2. Further, the lower substrate 52 is provided with a drive source (not shown), and the screw shaft 5 is driven by this drive source.
4 is configured to be rotationally driven via a power transmission mechanism (not shown) such as a gear, a pulley, and a belt.

A nut body 60 shown in FIGS. 4 and 5 is screwed onto the screw shaft 54. As shown in FIGS. A support shaft 61 is provided protruding from the nut body 60, and one end of a connecting body 62, which is a plate material bent into a substantially U-shaped cross section, is pivotally attached to the support shaft 61. The other end of this connecting body 62 is pivotally attached to a frame 63. That is, the frame 63 is formed by bending a plate material into a substantially U-shaped cross section with a width slightly smaller than the distance between the pair of guide rods 57. A bracket 64 is fixed to the inner surface of one longitudinal end of the intermediate side of the frame 63, and the other end of the connecting body 62 is pivotally connected to the bracket 64 by a support shaft 65. A pair of guide rollers 66 are rotatably provided on both outer surfaces of the frame 63, and these guide rollers 66 are engaged with the guide rod 57. Further, on the outer surfaces of both sides of the frame 63, there are provided elastic holding members 67 whose middle portions are fixed to the frame 63 and both ends are pressed against the guide rod 57. It prevents it from deviating from 57. moreover,
A flat mounting body 68 is attached to the frame 63 and connects a connecting piece 69 bent at both widthwise ends to a support shaft 7.
0. A pair of first supports 71 and a second support 72 (only one of which is shown) each having a substantially U-shaped cross section is provided on the upper surface of the mounting body 68. The first of each pair,
The second supports 71 and 72 are spaced apart in the width direction of the mounting body 68, and a support shaft 73 is attached to the second supports 71 and 72 on the mounting body 68.
It is rotatably provided along the width direction. A pine surge roller 74 made of a relatively hard elastic material such as rubber or synthetic resin is fitted onto each support shaft 73. A plurality of hemispherical protrusions 75 are provided on the outer peripheral surface of each pine surge roller 74 at predetermined intervals in the circumferential direction.
are protrudingly provided, and a through hole 76 penetrating in the width direction is bored inwardly in the radial direction corresponding to each projection 75.
Therefore, the protrusion 75 easily deforms elastically inward in the radial direction while crushing the through hole 76.

Attachment members 78 each having an engagement groove 77 formed therein are attached to the outer peripheral surfaces of the pair of first supports 71, as shown in FIGS. 6 and 7. A holding member 79 made of an elastic material such as rubber and molded into a ring shape is elastically stretched over these mounting members 78 with a portion of the holding member 79 engaging in the pair of engagement grooves 77. . This holding member 79 has a vibrating body 80
is installed. In other words, the vibrating body 80
As shown in the figure and FIG. 6, a rectangular base plate 81 is provided. One end of a clip 82 is fixed to the four corners of this base plate 81. The other end of the clip 82 is bent into an annular shape, and the holding member 79 is fitted into this portion. The base plate 81
A cylindrical case 83 is attached and fixed to the upper surface of the housing. A motor 84 is fitted and fixed into the case 83 via a packing 85. A weight 87 is eccentrically attached to the rotating shaft 86 of the motor 84. Therefore, the motor 84
The weight 8 is energized through the lead wire 88 to
When the holding member 7 rotates eccentrically, the base plate 81
9 is designed to vibrate while being elastically deformed. Furthermore, a dome-shaped pressing body 89 is attached to the base plate 81 so as to cover the case 83. This pressing body 89 projects upward in FIG. 6 from the pine surge roller 74, and has pressing portions 90 at both widthwise ends.
The center part is cut out leaving .

On the other hand, the pair of guide rods 57 can be rotated at any angle using the upper end as a fulcrum by a drive mechanism 91 shown in FIG. That is, at the lower ends of the pair of guide rods 57, a pedestal 92 having a substantially U-shape in plan is installed with both ends fixed. One end of a link 93 is pivotally attached to each side of the pedestal 92. The other ends of these links 93 are pivotally connected to both sides of a rectangular drive body 94. This driver 94 has a male screw 95.
are screwed together. This male screw 95 is rotatably supported by a support frame 96 having a U-shaped cross section. This support frame 96 is the back frame 2
It is attached and fixed to a band-shaped plate 97 installed on the bridge 5. One end of a flexible shaft 98 is connected to the upper end of the male screw 95. The other end of this flexible shaft 98 is the ninth
As shown in the figure, it is connected to an operation knob 99 rotatably provided on the back 2. Therefore, when the operation knob 99 is rotated, this rotation is transmitted to the male screw 95 via the flexible shaft 98, thereby driving the driver 94 in the axial direction of the male screw 95. Ru. When this driving body 94 is driven in the direction of the arrow in FIG. 8, the pair of links 93 rotate from an inclined state to a horizontal direction. Therefore, the pair of guide rods 57 are designed to rotate in the direction of the arrow with the lower ends protruding forward of the back 2 with the upper ends as fulcrums.

Additionally, first holes are provided at upper and lower ends of the back frame 25
As shown in the figure, a first limit switch 101 and a second limit switch are activated by the movement of the frame 63.
limit switches 102 are provided respectively. Each limit switch 101, 102 is electrically connected to a drive source (not shown) that rotationally drives the screw shaft 54, and changes the direction of rotation of the screw shaft 54. Therefore, the frame 25 is adapted to be driven back and forth between the first limit switch 101 and the second limit switch 102. Further, although not shown, cushioning materials are attached to the entire upper surface of the seat frame 5 and both sides of the back frame 25 in the width direction, and these cushioning materials are covered with an exterior material.

According to the pine surge device configured in this way, when the drive source (not shown) is activated to rotationally drive the screw shaft 54, the nut body 60 moves along the screw shaft 54. The frame 63 is interlocked via the connecting body 62. Therefore, the pine surge roller 74 provided on the frame 63 via the attachment body 68 performs pine surgery on the area from the waist to the shoulder of the user who is leaning on the back 2. Further, when the frame 63 reaches the bent portion 58 of the guide rod 57, the frame 63 is displaced and protrudes toward the front side of the back portion 2. Therefore, the user's shoulder at the position corresponding to the bent portion 58 is strongly massaged. Furthermore, when the guide rod 57 is rotated by the drive mechanism 91 in a direction in which the lower end protrudes toward the front side of the back part 2 using the upper end as a fulcrum as shown by the chain line in FIG. When the user travels to the lower end, the user's waist corresponding to this lower end is strongly pressed by the pine surge roller 74. In other words, the user can receive a stronger pine surge in the lower back region than in other parts.

Furthermore, when the motor 84 of the vibrating body 80 is energized at the same time as the frame 63 is run, this vibrating body 8
0 vibrates. Therefore, the user can use the vibrating body 80
Since the back muscles are massaged while being hit by the vibrations from the pressing body 89, the pine surge effect is improved in conjunction with the pressing action by the pine surge roller 74. Moreover, since the vibrating body 80 is attached to the elastic holding member 79, it vibrates with a large amplitude while elastically deforming the holding member 79.
Increases the pine surge effect. Furthermore, the pressing body 89 is cut out at the center, leaving pressing portions 90 at both ends in the width direction. Therefore, if the spine corresponds to this notched portion, the pressing body 89
Since the muscles on both sides of the spine receive a pine surge due to the vibration from the pressing part 90, the user does not feel pain due to the rubbing of the spine.

On the other hand, when a user sitting on a chair leans strongly on the back 2 and rotates the seat 1 in a direction in which its front end side rises, the front end of the seat 1 moves downward as shown in FIG. 11a. The link mechanism consisting of the first to fifth links, which had been contracted, is extended, and the footrest 22
protrudes upward from the front end side of the seat portion 1, as shown in FIG. 11b. Therefore, the user must use the footrest 22.
You can put your feet on the table and take a comfortable position. In addition, when the footrest 22 is protruded, it is shown in Fig. 11c.
As shown in the figure, the user can take a sleeping position by tilting the back 2 almost horizontally.Moreover, if the user receives a pine surge in this state, the user will be putting their weight on the back 2, so it will not be necessary to push hard. Can receive pressure pine surges. Furthermore, if the seat part 1 is rotated in the opposite direction with the back part 2 laid down almost horizontally and the link mechanism is contracted as shown in FIG. 11d, the seat part 1 and the back part 2 can be Since it is in almost a straight line, it is easy to pack it when shipping it from the factory.

[Effect of idea]

As mentioned above, this invention pivots the upper end of the guide rod that guides the movement of the frame on which the pine surge roller is rotatably mounted, to the back of the chair.
Since this guide rod can be rotated to any angle of inclination by a drive mechanism,
The force with which the pine surge roller presses against the back of the user who is leaning on the back can be changed.
For example, by rotating the guide rod in such a direction that its lower end protrudes toward the front of the back, it is possible to press the user's lower back more strongly than other parts of the body, and the pressing force also increases the angle of inclination of the guide rod. It can be arbitrarily adjusted by changing.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, with Fig. 1 being a side view showing the overall schematic configuration, Fig. 2 being a configuration diagram of the operating mechanism for operating the gas spring, and Fig. 3 showing the line shown in Fig. 2. 4 is a side view of the frame, FIG. 5 is a side sectional view, FIG. 6 is a half sectional view taken along the line of FIG. 5, and FIG. 7 is a perspective view of the first support. Fig. 8 is a perspective view of the drive mechanism of the guide rod, Fig. 9 is a sectional view of the part that operates the drive mechanism, Fig. 10 is an explanatory diagram when driving the guide rod, and Figs. 11 a to d are each of the chair. FIG. 4 is an explanatory diagram of different usage patterns. 2... Back, 54... Screw shaft, 57... Guide rod, 60... Nut body, 62... Connecting body, 6
3... Frame, 74... Pine surge roller, 9
1... Drive mechanism.

Claims (1)

[Scope of utility model registration request] A back part of the chair, a screw shaft provided along the vertical direction on the back part and driven to rotate, a nut body screwed onto the screw shaft, and an upper end pivotally connected to the back part and approximately connected to the screw shaft. A guide rod provided in parallel, a frame provided to run freely along this guide rod, a pine surge roller rotatably provided to this frame, and the guide rod rotated to any inclination angle using the upper end as a fulcrum. a drive mechanism for driving, one end of which is pivotally connected to the nut body and the other end of which is pivotally connected to the frame, which prevents the nut body from rotating together with the screw shaft of the nut body; The nut body is characterized by comprising a connecting body that transmits movement along the axial direction to the frame and rotates in conjunction with the displacement of the frame due to rotation of the guide rod to maintain a connected state between the frame and the nut body. A chair-type pine surge device.