JPH0112495B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chair-type pine surge device in which a pine surge roller runs vertically inside the back of a chair.

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 pine surge device, the pine surge effect for the user can be improved by having the pine surge roller not only run, but also run and vibrate.

However, as shown in Japanese Patent Publication No. 57-4265, for example, the conventional pine surge device has a screw shaft installed in the back along the vertical direction for rotational driving, and this screw shaft connects the frame on which the pine surge roller is installed. The structure is designed to drive the Therefore, since the movement of the frame driven by the screw shaft is restricted by the screw shaft, it has been difficult to vibrate the pine surge roller together with the frame.

This invention was made based on the above circumstances, and its purpose is to enable the pine surge roller to not only run inside the back but also to vibrate while running, thereby increasing the pine surge effect on the user. An object of the present invention is to provide a chair-type pine surgery device which is improved.

An embodiment of the present 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 an armrest. A pair of armrests 3 are attached to both sides in the width direction of the seat frame 4 that forms the seat part 1, and the lower end of the back frame 5 that forms the back part 2 is connected to the support shaft 6 at the rear end of the seat frame 4. It is pivoted by. A first bracket 7 is provided at the lower end of the back frame 5, and this first bracket 7
A cylinder 9 of a gas spring 8 is pivotally connected to the cylinder 9 . Further, a second bracket 10 is provided on the lower surface of the front end side of the seat frame 4, and the second bracket 10 has a connecting plate 12 fixed to the piston rod 11 of the gas spring 8, as shown in FIG. is pivotally connected by a support shaft 13. An end portion of a push rod 14 projects from the tip of the piston rod 11, and an operating lever 15, one end of which is pivotally connected to the support shaft 13, is opposed to this projecting end. The actuating lever 15 is biased by a spring 16a in the direction indicated by the arrow toward the push rod 14. One end of a wire 17 inserted through a flexible tube 16 is connected to the other end of the operating lever 15, and one end of the flexible tube 16 is fixedly attached to a mounting plate 18 attached to the piston rod 11. . The other end of the flexible tube 16 is introduced into one armrest 3, and the other end is fixed to a mounting plate 19 attached to the inside of the armrest 3.
The other end of the wire 17 is fixed to one end of an L-shaped interlocking lever 21 whose midway portion is pivotally supported by a support shaft 20 on the mounting plate 19 . An engagement groove 22 is formed at the other end of the interlocking lever 21 . A bushing 23 is provided on the inner wall of the armrest 3 facing the other end of the interlocking lever 21, and a shaft-shaped operation button 24 is slidably inserted into the bushing 23. A split groove 25 is formed at the end of the operation button 24 that projects into the armrest 3.
Further, a locking shaft 26 that crosses the split groove 25 is provided at the end of the operation button 24, and the engagement groove 22 of the interlocking lever 21 engages with this locking shaft 26.
Further, the interlocking lever 21 is connected to one end of the mounting plate 1.
9 and is biased in the direction of the arrow by a spring 27. Therefore, when the operation button 24 is pushed in and the interlocking lever 21 is rotated in the direction of the arrow, the wire 17 inserted through the flexible tube 16 is pulled and the operating lever 15 is rotated in the direction of the arrow, causing the gas spring 8 to rotate. Since the push rod 14 of the gas spring 8 is pressed, the piston rod 11 of the gas spring 8 is operated in the direction of protruding from the cylinder 9. In other words,
The length dimension between the cylinder 9 and the piston rod 11 becomes larger. As a result, the back portion 2 to which the cylinder 9 is connected rotates in the rising direction. In addition, when rotating the back 2 in the direction of folding down, press the operation button 2.
If the user leans on the back 2 while pressing 4,
The piston rod 11 of the gas spring 8 enters into the cylinder 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 8. In addition, the spring 16
A and 27 are for reducing the operating force when pressing the operating button 24.

On the other hand, a lower substrate 31 and an upper substrate 32 are provided at the upper and lower ends of the back frame 5 of the back portion 3, respectively, as shown in FIG. These substrates 31, 32
A screw shaft 33 is provided with both ends rotatably supported, and guide rods 34 are provided in parallel on both sides of the screw shaft 33 with both ends fixed to the substrates 31 and 32. The upper end of the guide rod 34 forms a bent portion 34a bent toward the front side of the back portion 3. Further, a first motor 35 is provided on the lower substrate 31, and the screw shaft 33 is rotationally driven by the first motor 35 via a power transmission mechanism (not shown) such as a gear, a pulley, and a belt. It's becoming like that. A driving body 33a shown in FIGS. 5 and 6 is screwed onto the screw shaft 33. As shown in FIGS. At one end of this drive body 33a, one end of a connection frame 35a having a substantially U-shaped cross section is connected to the first connection shaft 3.
It is pivoted by 6. This connecting frame 3
The other end of 5 is pivotally connected to one end of a first fixed frame 37 forming a frame by a second connecting shaft 38. The first fixed frame 37 has a substantially U-shaped cross section with an open upper surface and both end surfaces along the axial direction of the screw shaft 33. Flanges 39 are provided at the upper ends of both side walls of this first fixed frame 37.
are bent and have a pair of first axles 40 protruding from their outer surfaces. Each first axle 40 has an upper wheel 4 running along the guide rod 34.
1 is rotatably provided. A support member 4 is attached to one of a pair of first axles 40 protruding from each side wall.
One end of 2 is rotatably attached. A second axle 43 is provided at the other end of the support member 42, and a lower wheel 44 is rotatably provided on the second axle 43. A pulley 45 is fitted onto the other of the second axle 43 and the first axle 40, and a rubber belt 46 is attached to the pulley 45.
is installed. The restoring force of the rubber belt 46 urges the support member 42 in the direction indicated by the arrow in FIG. 6, so that the lower wheel 44 comes into contact with the guide rod 34. In other words, the upper wheel 41 and the lower wheel 44 are in a state where the guide rod 34 is held between them.

A rectangular plate-shaped second fixing frame 5 is attached to the flange 39 at the upper end of both side walls of the first fixing frame 37.
0 is fixed. Also, accommodated within the first fixed frame 37 is a first movable frame 51 having a substantially U-shaped side surface with an open upper surface and both sides parallel to the axial direction of the screw shaft 33 . The upper ends of both end walls 52 of the first movable frame 51 protrude toward the upper surface of the second fixed frame 50, and a flange 53 is bent thereon. A second movable frame 55 having a fitting hole 54 formed in the center thereof is fixed to this flange 53 . Pins 56 are vertically provided at the four corners of the second fixed frame 50, as shown in FIG. Each pin 56
is engaged with one end of a tension spring 57. The other end of each tension spring 57 is connected to the flange 5 of the second motor 58.
It engages with an engagement hole 60 formed in 9 against restoring force. Therefore, the second motor 58 is elastically held by the second fixed frame 50. Further, the rotation shaft 61 of the second motor 58 is
A through hole 6 bored in the center of the fixed frame 50 of
It protrudes from 2 to this upper surface side. This through hole 62
is formed to be sufficiently larger than the diameter of the rotating shaft 61. Further, one end of a wire 63 is fixed to each of the four corners of the second fixed frame 50. The other ends of these wires 63 are connected to the first movable frame 5.
It is connected and fixed at the four corners of 1. In other words, the first
The movable frame 51 is movably connected to the second fixed frame 50 by a wire 63.

A ring 65 is provided between the second fixed frame 50 and the second movable frame 55. One end of a pair of first bars 66 is pivotally attached to the lower surface of the ring 65 at a position offset by 180 degrees in the circumferential direction by a support shaft 67, and the end of a pair of first bars 66 is pivoted at a position offset by 90 degrees with respect to one end of the first bar 66. One end of a pair of second bars 68 is pivotally attached to the upper surface of the position by a support shaft 69.
The other ends of the pair of first bars 66 are pivotally connected to the upper surface of the second fixed frame 50 by a support shaft 70. The other end of the pair of second bars 68 is attached to a support shaft 7 on the lower surface of the second movable frame 55.
It is pivoted by 1. 1st and 2nd of each pair
The bars 66 and 68 are parallel to each other, and the first bar 66 and the second bar 68 are perpendicular to each other. Therefore, the first and second movable frames 51 and 55 are connected to the first and second fixed frames 37 and 5.
The second motor 58 is connected to the motor 58 by the first and second bars 66 and 68 so as to be displaceable in a plane direction perpendicular to the rotating shaft 61 of the second motor 58.

An outer ring 73 of a bearing 72 is fitted into the fitting hole 54 formed in the second movable frame 55 . A vibrating body 75 is fitted into an inner ring 74 of a bearing 72 that is rotatable with respect to the outer ring 73. This vibrating body 75 has a disk shape, and the rotating shaft 61 of the second motor 58 is fitted at a position offset from the center by a predetermined amount. That is, the vibrating body 75 is eccentrically rotated by the second motor 58. Therefore, due to the eccentric rotation of the vibrating body 75, the first and second movable frames 51, 5
5 is starting to vibrate. Further, since the second movable frame 55 is connected to the second fixed frame 50 via the first bar 66, the ring 65, and the second bar 68, the second movable frame 55 is connected to the second fixed frame 50. Even if rotational force is received from the rotating shaft 61 of the motor 58 via the bearing 72, the motor 58 does not rotate significantly.

A first support member 80 and a second support member 81 are erected on the upper surface of the second movable frame 55 and spaced apart along the axial direction of the screw shaft 33. A first roller shaft 83 on which a pair of first pine surge rollers 82 made of an elastic material such as rubber is rotatably attached to the first support member 80 is perpendicular to the axis of the screw shaft 33. It is being constructed. Further, one end of a movable member 84 is pivotally attached to the second support member 81 by a support shaft 85a. A pair of second pine surge rollers 85 are rotatably attached to the movable member 84.
A roller shaft 86 is installed with its axis parallel to the first roller shaft 83. The movable member 84
A spring 87 is provided on the support shaft 85a which is pivotally connected to the
This spring 87 urges the movable member 84 in the direction indicated by the arrow in FIG. Rotation of the movable member 84 in the direction of the arrow is restricted by the lower end surface coming into contact with the upper surface of the second movable frame 55, and the movable member 84 can rotate in the opposite direction against the restoring force of the spring 87. It's becoming like that.

Note that the first and second pine surge rollers 82, 8
Hemispherical acupressure protrusions 88 are protruded from the outer circumferential surface of 5 at predetermined intervals in the circumferential direction, and cavities 89 penetrating in the thickness direction are bored inwardly in the radial direction corresponding to the protrusions 88. . Therefore, when the protrusion 88 is strongly pressed, the cavity 89 is deformed and the protrusion 88
is elastically deformed radially inward.

On the other hand, a cushion material 90 is attached to the entire upper surface of the seat frame 4 as shown by the chain line in FIG. 1, and cushion materials 91 are attached to the front surface of the back frame 5 on both sides in the width direction. The seat frame 4 and the back frame 5 are covered with an exterior material 92.

Furthermore, a first limit switch 93 and a second limit switch 94 are provided at the upper and lower ends of the back frame 5, respectively, and are actuated by the running of the frame. Each limit switch 9
3 and 94 are electrically connected to the first motor 35 and convert the rotational direction of the first motor 35, that is, the rotational direction of the screw shaft 33. Therefore, the frame is adapted to be driven back and forth between the first limit switch 93 and the second limit switch 94.

According to the pine surge device configured in this way, when the first motor 35 is operated to rotate the screw shaft 33, the drive body 3 is rotated along the screw shaft 33.
4 moves, the frame is linked to this driving body 34. Therefore, the first and second movable frames provided on the second movable frame 55 forming this frame are
The pine surge rollers 82 and 83 perform pine surgery from the waist to the shoulder of the user who is leaning on the back 3. At this time, the projections 88 protruding from the outer peripheral surfaces of the pine surge rollers 82 and 83 also provide an acupressure effect. Furthermore, when the frame reaches the bending part 34a of the guide rod 34, the first rotation frame 37 rotates about the second connecting shaft 38, which is the connection point with the connecting frame 35, as a fulcrum, so that the entire frame is rotated at the bending part. Depending on the bent shape of 34a, it protrudes toward the front side of back portion 3. Therefore, the bent portion 34a
The shoulder of the user in the corresponding position will be strongly pine-surged.

On the other hand, at the same time that the first motor 35 is operated to cause the frame to travel, the second motor 58, which is elastically held by a tension spring 57 on the second fixed frame 50 forming the frame, is operated. Then, the rotation shaft 61 of this second motor 58
Since the vibrating body 75 fitted into the frame rotates eccentrically, the first and second movable frames 5
1,55 vibrates. When the second movable frame 55 vibrates, the first and second pine surge rollers 82 and 83 attached thereto also vibrate. Therefore, since the user's body is pressed by the vibrating first and second pine surge rollers 82 and 83, the pine surge effect is improved compared to the case where the user's body is simply pressed.

In addition, if the user strongly presses his or her body against the back 3, the first and second pine surge rollers 82, 83 may
When a large load is applied to the first and second movable frames 51 and 55, this load may cause the first and second movable frames 51 and 55 to shift by an amount greater than the amount of displacement due to vibration. Then, a large force is applied to the rotating shaft 61 of the second motor 58, which has the vibrating body 75 fitted integrally with the second movable frame 55, and this force causes the tension spring 57 to be applied to the second fixed frame 50. The second motor 58, which is elastically held by the movable frames 51 and 55, is elastically displaced according to the amount of displacement of the first and second movable frames 51 and 55.
Therefore, the first and second movable frames 51, 5
Even if motor 5 is largely displaced, no unreasonable force is applied to the rotating shaft 61 of the second motor 58. In other words,
The second motor 58 may be overloaded and damaged;
There is no possibility that the rotating shaft 61 will not rotate smoothly.

In addition, the first and second pine surge rollers 82, 8
3 is pressed by the user's body, the first movable frame 51 along with the second movable frame 55
tries to tilt. However, the four corners of the first movable frame 51 are connected to the second movable frame 51 by wires 63.
Since the wires 63 are connected to the fixed frame 50, the inclination of the first and second movable frames 51 and 55 is restricted by these wires 63.

As described above, the present invention drives a fixed frame by rotation of a screw shaft, and movably connects a movable frame to this fixed frame.
A motor is elastically held on the fixed frame by a spring, a vibrating body is attached eccentrically to the rotating shaft of the motor, and this vibrating body is rotatably inserted into a fitting hole formed in the fixed frame. They were fitted together, and a pine surge roller was rotatably attached to the movable frame. Therefore, since the pine surge roller vibrates together with the movable frame due to the rotation of the vibrating body, the user can receive a highly effective pine surge by the vibrating pine surge roller. In addition, since the motor is elastically held by the fixed frame by a spring, when the movable frame is largely displaced relative to the fixed frame, the motor is elastically displaced in conjunction with this movement. Therefore, since no excessive force is applied to the rotating shaft of the motor, there is no possibility of premature damage to the motor or failure of the rotating shaft to rotate smoothly.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view showing the overall schematic configuration, Fig. 2 is a front view of the back frame, and Fig. 3 is a configuration diagram of the operating mechanism for operating the gas spring. Figure 4 is a side view along the line of Figure 3, Figure 5 is a partially sectional plan view of the frame, Figure 6 is a side view, Figure 7 is a perspective view, and Figure 8 is an exploded perspective view. It is a diagram. 2... Back, 33... Screw shaft, 37, 50...
Fixed frame, 51, 55...Movable frame, 5
4... Fitting hole, 57... Tension spring, 58... Second
motor, 61... rotating shaft, 75... vibrating body, 8
2,85...pine surge roller.

Claims (1)

[Claims] 1. The back of the chair, a screw shaft provided in the back along the vertical direction that is rotatably driven, a fixed frame driven by the screw shaft, and a fixed frame that is elastically attached to the fixed frame by a spring. A held motor, a vibrating body eccentrically attached to the rotational axis of the motor, and a plane perpendicular to the rotational axis of the motor on the fixed frame, the vibrating body having a fitting hole into which the vibrating body is rotatably fitted. 1. A chair-type pine surgery device comprising a movable frame connected to the movable frame so as to be movable in a direction, and a pine surge roller rotatably supported by the movable frame.