JP3653466B2 - Reclining chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reclining chair having a structure in which a footrest is interlocked in the vertical direction in conjunction with a back-and-forth movement of a back body.
[0002]
[Prior art]
In general, a reclining chair supports a seat body on a chair body, and a footrest is connected to the front end of the seat body so as to be rotatable in the vertical direction, and a back body is connected to the rear end so as to be rotatable in the front-rear direction. ing.
[0003]
The reclining chair having the above configuration is used in a relaxed posture in which the user lowers the upper body along the back body and lifts the leg by tilting the back body backward and rotating the footrest upward. Be able to.
[0004]
Conventionally, a configuration shown in Japanese Utility Model Publication No. 3-22747 is known as a prior art of a reclining chair. In the reclining chair shown in this publication, the lower end of the back body and the lower surface of the middle part of the footrest are connected by a connecting rod so that the footrest is interlocked with the rotation of the back body.
[0005]
[Problems to be solved by the invention]
By the way, in the conventional reclining chair, since the rotation angle in the vertical direction of the footrest is substantially the same as the rotation angle in the front-rear direction of the back body, the rotation angle of the back body in the rear direction is small. In some cases, the footrest can only be slightly rotated in the upward direction.
[0006]
For this reason, for example, when watching TV or reading books, it is not easy to use because the legs cannot be lifted sufficiently, that is, relaxed, without greatly tilting the upper body backward. there were.
[0007]
An object of the present invention is to provide a reclining chair in which the footrest can be sufficiently rotated in the ascending direction even if the rotation angle of the back portion of the back body is small.
[0008]
[Means for Solving the Problems]
The invention of claim 1
The chair body,
A seat body supported by the chair body;
A footrest connected to the front end of the seat body so as to be rotatable in the vertical direction;
A back body coupled to the rear end of the seat body so as to be pivotable in the front-rear direction;
Driving means provided on the chair body or the seat body, and rotating the back body in the front-rear direction and holding it at a predetermined rotation angle;
In conjunction with the back-and-forth rotation of the back body, the footrest is rotated in the up-and-down direction, and the rotation angle of the footrest in the upward direction with respect to the rearward rotation angle of the back body is set. An increasing link mechanism,
The link mechanism includes a first link having one end pivotally attached to the lower end of the back body, one end pivotally attached to the other end of the first link, and the other end pivotally attached to the seat body. A second link having substantially the same length as the first link, one end pivotally connected to the other end of the first link together with one end of the second link, and the other end pivoted to the footrest. A third link worn,
The configuration is such that when the back body is rotated rearward, the rotation of the lower end of the back body is transmitted to the third link via the first and second links. 1 in the reclining chair.
[0009]
According to the first aspect of the present invention, not only the foot mount is interlocked with the rotation of the back body by the link mechanism, but also the rotation angle of the foot mount in the upward direction with respect to the rotation angle of the back of the back body. Therefore, the footrest can be sufficiently rotated in the ascending direction even if the angle of the backward rotation of the back body is slight.
[0010]
In addition, the first link and the second link are set to substantially the same length, so that the first link is lowered in a state where the back body is tilted to a predetermined angle and the footrest is raised to the predetermined angle. Since the angle formed by the second link and the second link can be increased, even if a rotational force is applied to the first and second links via the footrest and the third link, the positional relationship between these first and second links Is prevented from changing, and the next operation by the driving means can be performed smoothly.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS.
[0012]
FIG. 1 is a perspective view in which a part of the reclining chair is omitted, and the reclining chair includes a chair body 1. The chair body 1 has a pair of grounding plates 3 connected at a predetermined interval by a pair of connecting plates 2. An armrest plate 4 is erected in the middle in the longitudinal direction of the ground plate 3 with its lower end fixed.
[0013]
An armrest 5 is provided at the upper ends of the pair of armrest plates 4 along the front-rear direction. A roller 3 a is provided at the rear end of the ground plate 3. The chair body 1 can be easily moved by the roller 3a by lifting the front end side.
[0014]
As shown in FIGS. 1 and 4, a connecting shaft 8 that protrudes from both sides of the rear end of the seat frame 7 constituting the seat body 6 is fixed to the middle portion of the armrest plate 4 in the height direction. Has been.
[0015]
The seat frame 7 has a pair of side hooks 9, and the side hooks 9 are connected to the rear end and the front end by a rear connecting hook 11 and a strip-like front connecting hook 12, respectively. . As shown in FIG. 1, the rear connecting rod 11 is connected via a connecting piece 11a suspended from the side rod 9, and the front connecting rod 12 has a lower end fixed to the connecting plate 2 on the front side. It is fixed at the top of the. Further, a plurality of S-shaped springs 14 are stretched between the pair of side flanges 9.
[0016]
A footrest frame 22 constituting a footrest 21 is connected to the front end of the seat frame 7 so as to be rotatable in the vertical direction. The footrest frame 22 has a rear frame 24 formed of a pipe having one end rotatably connected to the front end of the seat frame 7 by a support shaft 23, and the other end of the rear frame 24. The other half of the contact coil spring 25 as an elastic member inserted approximately half and fixed by caulking is connected to one end of a front frame 26 formed of a pipe inserted and fixed by caulking. Accordingly, the footrest frame 22 is bent with respect to the rear frame 24 because the contact coil spring 25 is elastically bent when a predetermined load or more is applied to the front frame 26. Become.
[0017]
A connecting rod 27 is laid in the width direction on the rear frame 24, and a band member 28 such as a rubber belt or a cloth belt is stretched in the width direction on the front frame 26.
[0018]
The seat body 6 and the footrest body 21 are provided with a cushion body 29 (shown in FIGS. 2 to 4) that can be bent over the entire upper surfaces of the frames 7 and 22. One to a plurality of vibrators 30 are provided on the footrest body 21 of the cushion body 29.
[0019]
The cushion body 29 is composed of a flexible cushion body 29a made of urethane foam or the like and a bag-shaped exterior ground 29b covering the cushion body 29a.
[0020]
Although not shown, a bag portion having one end opened is provided in a portion corresponding to the footrest frame 22 of the exterior ground 29b, and the footrest frame 22 is accommodated in the bag portion.
[0021]
In addition, a connecting piece (not shown) is provided at a portion corresponding to the seat frame 7 of the exterior ground 29b so as to extend left and right. The connecting piece is connected to the pair of side portions 9 of the seat frame 7. A velvet fastener (not shown) attached to the end of the connecting piece so as to be wound is engaged with a velvet fastener (not shown) attached to the lower surface of the side flange 9. Accordingly, the cushion body 29 is detachably held on the seat frame 7 and the footrest frame 22.
[0022]
A back body 31 is provided at the rear end of the seat frame 7 so that the lower part is pivotably connected. That is, the back body 31 has a back frame 32 as shown in FIGS. 2, 3, and 7, and brackets 33 project from the lower side of the back frame 32 toward the front side. The bracket 33 is rotatably connected to a connecting shaft 8 provided on the seat frame 7.
[0023]
As shown in FIG. 2, the back frame 32 is provided with guide members 35 extending substantially along the entire vertical direction on both sides in the width direction, and a massage unit 36 having a massage roller 36 a is provided on the guide member 35. That is, on both sides of the massage unit 36, a guide roller 37 and a pinion 38 that is rotationally driven by a drive source (not shown) built in the massage unit 36 are provided. The guide roller 37 is supported by the guide member 35 so as to be able to roll, and the pinion 38 is engaged with a rack 39 provided on the guide member 35.
[0024]
The back body 31 is covered with a bag-like exterior 40 that can be opened and closed on the back side, and a cushion material (not shown) is provided in a portion other than the travel range of the massage unit 36.
[0025]
As shown in FIGS. 1, 2, and 7, a driving means 51 is provided on the lower surface of the front end portion of the seat body 6. The drive means 51 has a drive source 52 composed of a reversible motor, a speed reducer, and the like, and a drive shaft 53 that is driven forward and backward in the axial direction by the drive source 52, and the drive source 52 is provided in the front connecting rod 12. The drive shaft 53 is pivotally attached to a bracket 55 (shown in FIGS. 1 and 7) provided at the lower end of the back frame 32.
[0026]
Therefore, when the drive shaft 53 is driven forward and backward in the axial direction by the drive source 52, the back body 31 is rotated in the front-rear direction with the connecting shaft 8 as a fulcrum.
[0027]
The back body 31 and the footrest 2 are connected by a link mechanism 61. The link mechanism 61 has a first link 62 as shown in FIGS. One end of the first link 62 is pivotally attached to an L-shaped back side connecting member 63 provided at the lower end of the back frame 32 by a shaft 62a. That is, the back side connecting member 63 has one end fixed to the back frame 32 and the other end extending forward, and one end of the first link 62 is pivotally attached to the other end.
[0028]
The second link 64 and one end of the third link 65 are pivotally attached to the other end of the first link 62 by a shaft 64b. The second link 64 is set to have substantially the same length as the first link 62, and the other end is attached to a seat side connecting member 66 suspended from the rear connecting rod 11 of the seat frame 7 by a shaft 64a. It is pivotally attached.
[0029]
In the third link 65, a rear link piece 65a and a front link piece 65b are rotatably connected to each other, and the other end of the rear link piece 65a is connected to the other end of the first link 62. It is pivotally attached.
[0030]
The other end of the third link 65, that is, the other end of the front link piece 65 b is pivotally attached to the other end of the leg-side connecting member 67 whose one end is connected to the connecting rod 27 of the rear frame 24 of the footrest 21. . An engagement piece 68 that engages with the upper end surface of one end of the rear link piece 65a is provided on the upper end surface of one end of the front link piece 65b. As a result, the third link 65 cannot bend the connecting portion between the rear link piece 65a and the front link piece 65b downward, but can be bent upward.
[0031]
As shown in FIGS. 2 and 3, the length of the first to third links 62, 64, 65 is the same as that of the first link 62 when the back body 31 is raised to the maximum extent forward. The other end connected to the second link 64 is set to be located on the rear side of the chair body 1 from the one end connected to the back side connecting member 63. In the state where the back body 31 stands up to the maximum extent, the footrest body 21 is lowered in a substantially vertical state.
[0032]
Further, since the length dimensions of the first link 62 and the second link 64 are set to be substantially the same, the first body 62 is raised to the front as shown in FIG. The angle α formed by the link 62 and the second link 64, and the first link 62 and the second link 64 in the state where the back body 31 is tilted rearward from the state of FIG. 3 as shown in FIG. The formed angle β is set so that β> α.
[0033]
Below, the form in the case of using the reclining chair of the said structure is demonstrated.
[0034]
The back body 31 can be used in a state where it stands up to the maximum as shown by a solid line in FIG. 2 and a state where it lies backward as shown by a chain line in FIG. The back body 31 can be held at a predetermined fall angle between a state where the back body 31 is maximally raised to the front and a state where the back body 31 is maximally lying backward.
[0035]
As shown in FIG. 2, in the state where the back body 31 is raised to the maximum as shown by the solid line, the footrest body 21 is lying down substantially vertically. Therefore, in this state, the user simply sits on the seat body 6 and leans on the back body 31, and the leg is not supported in a state where the leg is lifted by the footrest body 21.
[0036]
If you are watching TV, reading while seated, or if you are taking a back massage in the case of a massage chair, do not fold your upper body backwards Sometimes I want to lift and take a comfortable posture.
[0037]
In such a case, the drive source 52 is operated to retract the drive shaft 53 in the axial direction. As a result, the back body 31 whose lower end is connected to the drive shaft 53 lies down from the position indicated by the solid line in FIG.
[0038]
For example, when the back body 31 shown in FIG. 2 and FIG. 3 is maximally raised from the standing state to the rear, which is the state shown in FIG. 4 (this state is the first state), Along with the back side connecting member 63 provided at the lower end of the back body 31, the other end of the first link 62 pivoted to the back side connecting member 63 by a shaft 62a is turned up with the shaft 64b as a fulcrum. To do.
[0039]
Further, at this time, the second link 64 is pivoted forward at the other end with the one end connected to the shaft 64a as a fulcrum, so that the rear end of the second link 64 is connected to the first link 62 and the second link 64 by the shaft 64b. The third link 65 to which is connected is advanced in the direction indicated by the arrow in FIG. 4, and the footrest 21 is raised from the state where it is lowered substantially vertically by an angle of about 70 degrees as shown in FIG.
[0040]
That is, when the back body 31 is tilted backward as shown in FIGS. 3 to 4 by operating the drive source 52, the first and second links 62 and 64 are used to rotate the back body 31 in the lying direction. Since the third link 65 is interlocked and the footrest body 21 is raised by the third link 65, the footrest body 21 can be raised at a larger angle than the lying angle of the back body 31. .
[0041]
That is, compared to the case where one end of the third link 65 is directly connected to the back side connecting member 63, the moving distance of the third link 65 to the front increases.
[0042]
Therefore, the footrest 21 can be raised to the position of the chain line indicated by X even by slightly tilting the back body 31 as indicated by the chain line A in FIG.
[0043]
As a result, the user can take a comfortable posture suitable for watching TV, reading, or receiving massage from a massage chair.
[0044]
In the first lying state in which the back body 31 shown in FIG. 3 is slightly lowered from the standing state where the back body 31 is raised most forward and the footrest 21 is raised as shown in FIG. In order to shift the position of the chair, the user may get off the chair, put his hand on the footrest 21 and lift the footrest 21.
[0045]
In this case, since the third link 65 is pulled in the forward direction, the third link 65 is rotated around the first link 62 and the second link 64 pivotally attached to the rear end of the third link 65 by the shaft 64b. A force in the direction of movement will be applied.
[0046]
When the angle formed between the first link 62 and the second link 64 is small in the first lying down state of FIG. 4, these links rattle due to the force in the rotational direction. It may overlap. If the drive source 52 is operated in this state, the links 62 and 64 may not be smoothly rotated in a predetermined direction.
[0047]
However, in the present invention, the first link 62 and the second link 64 are made substantially the same length, so that the first link 62 and the second link 64 in the first lying state shown in FIG. Is made larger than the angle α formed by these links 62 and 64 in the standing state shown in FIG.
[0048]
Therefore, even if the third link 65 is pulled in the forward direction, for example, by moving the chair in the state of FIG. The positional relationship between the link 62 and the second link 64 does not change.
[0049]
Therefore, even if the drive source 52 is operated after lifting the footrest 21 or the like, the links 62 and 64 are smoothly rotated in a predetermined direction, so that the back body 31 and the footrest 21 are surely placed in a desired direction. Can be operated.
[0050]
On the other hand, when the user wants to lie down with his body stretched, the back body 31 is further lowered from the first lying state shown in FIG. 4, and the position of the chain line indicated by B in FIG. To the maximum to surrender to the maximum.
[0051]
As a result, the footrest 21 rotates in the upward direction to the position of the chain line indicated by Y in FIG. 2, and the footrest 21, the seat portion 6 and the back portion 31 become substantially horizontal. Can lie in the state. The operating state of the link mechanism 61 at this time is as shown in FIG.
[0052]
When the back body 31 is further rotated rearward from the state of FIG. 4 to move to the second lying state of FIG. 5, the first link 62 hardly pivots forward, and the connecting member 63 has the shaft 62a. Since the end part connected by is only displaced upward, the amount of movement of the third link 65 in the forward direction is smaller than when the back part 31 is laid down to the state indicated by A in FIG. Therefore, the rising angle of the footrest body 21 does not increase as compared with the first lying down state compared to the rotation angle of the back body 31.
[0053]
As shown in FIG. 5, if a large load is applied to the upper surface of the footrest body 21 in a state where the footrest body 21 is raised almost horizontally, the footrest body 21 may be bent downward and damaged. However, the footrest frame 22 of the footrest 21 has a configuration in which the rear frame 24 and the front frame 26 are connected by the contact coil spring 25.
[0054]
Therefore, when a load greater than a predetermined value is applied to the front frame 26 on the upper surface of the footrest 21, that is, a load greater than a predetermined value compared to the weight of the user's leg, the front frame 26 is attached to the contact coil spring 25. Is deformed elastically and bent downward. For this reason, even if a predetermined load or more is applied to the footrest 21, damage is prevented by the load.
[0055]
When the back body 31 is laid back, there is a case where it is desired to take a posture without lifting the leg. That is, there is a case where it is desired to lower the footrest body 21 to a substantially vertical state without raising it. In such a case, as shown in FIG. 5, if the footrest 21 is raised by laying down the back body 31, the middle part of the third link 65 of the link mechanism 61 is moved upward as shown in FIG. And the third link 65 is bent.
[0056]
That is, the third link 65 is configured such that the rear link piece 65a and the front link piece 65b are rotatably connected, and can be bent only upward without being bent downward by the engagement piece 68. .
[0057]
Therefore, even if a load is applied to the raised footrest 21, the third link 65 does not bend downward due to the load, but the user connects the rear link piece 65a and the front link piece 65b. Can be bent upward, so that the footrest 21 can be lowered without rotating the back body 31 forward.
[0058]
In the various usage forms described above, if the massage unit 36 provided on the back body 31 is operated and travels along the vertical direction of the back body 31, the user massages the portion located on the back body 31. Can receive. Furthermore, if the vibrator 30 provided in the portion of the footrest body 21 of the cushion body 29 is operated, the user can also receive massage by vibration on the legs.
[0059]
Although not shown, the massage unit 36 and the vibrator 30 are connected to a power cord so as to be energized, and various operations are performed by a remote control switch.
[0060]
In the above embodiment, the rear frame and the front frame of the footrest are connected by the contact coil spring 25 as an elastic member. However, instead of the contact coil spring 25, an elastic member such as rubber may be used. The driving means for driving the back body 31 in the front-rear direction may be a gas spring. Furthermore, the structure of the chair body is not limited at all, and the driving means may be provided on the seat body instead of the chair body.
[0061]
【The invention's effect】
According to the present invention, the link mechanism not only interlocks the footrest with the rotation of the back body, but also increases the rotation angle of the footrest in the upward direction with respect to the rearward rotation angle of the back body. I made it.
[0062]
Therefore, even if the back body has a slight rearward rotation angle, the footrest can be sufficiently rotated in the upward direction. For example, when watching TV or reading, the upper body should be greatly tilted backward. And can take an easy posture with the legs raised.
[0063]
And since the 1st link and the 2nd link were set to the substantially same length dimension, in the state which fell the back part body to the predetermined angle and raised the footrest to the predetermined angle, The angle formed by the second link can be increased.
[0064]
Therefore, even if a force in the rotational direction is applied to the footrest while the footrest is raised, and the rotational force is applied to the first and second links via the footrest and the third link, Since it is possible to prevent the first and second links from overlapping each other, the first and second links can be reliably and smoothly driven in a predetermined direction by the driving means.
[Brief description of the drawings]
FIG. 1 is a partially cutaway perspective view of a chair showing an embodiment of the present invention.
FIG. 2 is a side view of the same.
FIG. 3 is an enlarged side view of the link mechanism.
FIG. 4 is an enlarged side view showing a state where the back body is slightly tilted backward.
FIG. 5 is an enlarged side view showing the state in which the back body is tilted back to the maximum extent.
FIG. 6 is an enlarged sectional view of the link mechanism.
FIG. 7 is an enlarged plan view of the same seat portion.
FIG. 8 is an enlarged side view showing a state in which the footrest is rotated downward with the back body lying down backward.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Chair main body 6 ... Seat part body 21 ... Footrest body 24 ... Rear part frame 25 ... Adhesion coil spring (elastic member)
26 ... Front frame 31 ... Back body 36 ... Massage unit 36a ... Massage roller 61 ... Link mechanism 62 ... First link 64 ... Second link 65 ... Third link

Claims (1)

The chair body,
A seat body supported by the chair body;
A footrest connected to the front end of the seat body so as to be rotatable in the vertical direction;
A back body coupled to the rear end of the seat body so as to be pivotable in the front-rear direction;
A driving means provided on the chair body or the seat body to rotate the back body in the front-rear direction and hold it at a predetermined rotation angle;
In conjunction with the back-and-forth rotation of the back body, the footrest is rotated in the up-and-down direction, and the rotation angle of the footrest in the ascending direction with respect to the rearward rotation angle of the back body. An increasing link mechanism,
The link mechanism includes a first link having one end pivotally attached to the lower end of the back body, one end pivotally attached to the other end of the first link, and the other end pivotally attached to the seat body. A second link having substantially the same length as the first link, one end pivotally connected to the other end of the first link together with one end of the second link, and the other end pivoted to the footrest. A third link worn,
A reclining chair characterized in that when the back body rotates backward, the rotation of the lower end of the back body is transmitted to the third link through the first and second links. .

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