JPS6039562B2 - vehicle seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a passenger seat such as an automobile, in particular, a support member such as a headrest, a thigh support device, etc., which is connected to the stay by a drive device provided at the front side of the seat of the seat and at the upper end of the back. The present invention also relates to a vehicle seat in which the support member is rotatable by rotating the shaft.

Conventional support members include, for example, a headrest 6 that supports the occupant's head as shown in FIGS. 1 to 5, or a thigh support device 23 that supports the occupant's thighs as shown in FIG. . To explain in more detail, the headrest 6 shown in FIGS. 1 to 3 is vertically movable via a synthetic resin cylinder 5 on a bracket 4 interposed above the back frame 3 of the backrest 2 of the seat 1. It is attached to.

7 is a stay of the headrest 6; 8 is a stepped portion of the stay 7;
Reference numeral 9 denotes a step of the cylindrical body 5 which is iron-fitted to the step 8, 10 a spring suspended on the back frame 3, 11 a pad on which the spring 0' is supported, and 12 a pad 1.
1, and 13 and 14 are pads and frames that constitute the headrest 6.

Further, the headrest 6 shown in FIGS. 4 and 5 is attached to the seat 1.
5, 16 and the stay 7, etc., as shown in 6', the structure is rotatable.

17 is a seat portion.

Thus, in the case of the support member, for example the headrest 6, only vertical or rotational adjustment is possible.

Therefore, it is not possible to select a comfortable position suitable for each different head shape, and additional parts such as a pillow cover, pillow cushion, etc. must be added to find an arbitrary position. Further, the thigh support device 23 shown in FIG.
The seat portion 24 and the backrest 25 of the seat 20 are configured to rotate about the center point 2 as shown at 24' and 25'. The rotated front side 26 of the seat 24 presses the occupant's thighs from below and lifts them up. In the case of the support member, for example, the thigh support device 23, the entire seat portion 24 is lifted up around the hinge 22, which causes the occupant's hip point HP to move to the position EP', causing the inside mirror, outside mirror, etc. It becomes necessary to readjust the angles of related parts such as side mirrors and steering columns as the hip point HP changes.

Furthermore, since the back support 25 is tilted from its original position, it is necessary to readjust the back support 25 to an appropriate angle to support the back of the passenger. Also, if the occupant's legs, especially the shins, are long, there will be a gap between the front side 26 of the seat 2 and the thighs, and it will be difficult to raise the entire thighs. Seat part 2
It is necessary to move the support member further forward than the front side 26 of 4. However, such means have not been found in the prior art. In the figure, 27 is a headrest, and 28, 28' are brackets for fixing the slide rail 21 to the floor 29.
Furthermore, if a drive device for rotationally driving a support section such as the headrest 6 or the thigh support device 23 is provided on each support member, the distance from the center of rotation of the mechanism to the support member is short, so that rotational movement is difficult. The amount may be small and the support may not be sufficient. In view of such conventional examples, the present invention provides a support member configured to be able to freely appear and retract from the front side of the seat, the upper end of the back seat, etc. for vertical movement adjustment or front and rear movement adjustment, etc., and is rotatable by a drive device via a stay and a shaft. To provide a vehicle seat configured as follows. Next, the structure of an embodiment of the present invention will be explained using the drawings of FIGS. 7 to 14.

7 to 11 illustrate support members such as headrests.

In the figure, 30 is a back frame 32 which is rotatable or fixed to the back frame (not shown).
and a side bracket 34 fixed to the back frame 32 by means such as welding, a drive device 36 fixed to one side of the side bracket 34 with a pin 35, and a drive device 36 fixed to the other side bracket 34 (not shown). A shaft 44 whose one end is rotatably supported by a shaft bracket 38 provided therein, and which is installed by means of welding GW or the like on a third member 42 whose end is fixed to the drive device 36 with a pin 40;
A bracket 46 is fixed to the shaft 44, a cylindrical body 48 is disposed on the rear side of the shaft 44 and fixed to the bracket 46, and a stay 6 is retractable from the cylindrical body 48.
It consists of a headrest 52 that moves up and down from the river.

51 is an E-ring that competes with the stay 50'.

Reference numeral 54 denotes an elastic body called Plumaflex, which is suspended on the bracket 46; 56, a cushioning material covering the elastic body 54; 58, a cover cloth covering the cushioning material 56; A guide bracket 62 fixed to the headrest 52 is a head pad formed on the cushioning material 56 and the cover cloth 58 and recessing the housing portion 64 of the headrest 52 .

The headrest 52 includes the stay 50, a frame 66, and a pad 68. The means for vertically moving the headrest 52 is not limited to the stay 50 that can freely move in and out of the cylindrical body 48. As shown in FIGS. 10 and 11, the drive device 36 includes a first member 72 having an internal gear 70 having teeth formed inside a cylinder, and the internal gear 7.
An external gear 74 is formed which meshes with the internal gear 70, and the external gear 74 has at least 1 and at most 3 fewer teeth than the internal gear 70, and has at least a diameter A of the root circle of the internal gear 70. A second member 76 formed to have a tip circle diameter B smaller by the total tooth length, the second member 76 being formed into a collar portion 78, and the first member 72 being formed into an eccentric ring portion 80 eccentric to the shaft portion 78. The first member 72 and the second member 7 are rotatably supported, respectively.
A handle 88 is fixed to a female thread 84 formed on one side 82a of the eccentric shaft 82 with a screw 86. and the other 82b of the eccentric shaft 82, and swage the end face 82c of the eccentric shaft 82 to the other 82b.
2b, a flat washer 90 that prevents the first member 72 from coming off;
A plate with iron inserted between it and one side 82a of No. 2, and a part of the eccentric shaft 82 is swaged into a notch (not shown) to be integrated with the eccentric ball 82 to prevent the No. 276 from coming off. 94 and more.

Reference numeral 96 denotes an overhanging ear portion of the first member 72, and the ear portions 96, 9
A prepared hole 100 with a female thread is formed in 6.

102 is an arm portion of the second member 76;
A pilot hole 10 is formed with a female thread into which the piston 35 is screwed.
It has 4,104.

The internal gear 70 and the external gear 74 are formed by pressing a first member 72 and a second member 76.

Next, a support member such as a thigh support device will be explained using FIGS. 12 to 14.

In the figure, 110 is a seat, and the seat 110 is a cushion frame 112 installed on a slide rail (not shown).
A drive device 36 is fixed to a bracket 114 fixed to the cushion frame 112 with a pin 35, one end is rotatably supported by the cushion frame 112, and the other end is screwed to the drive device 36. A shaft ZI 16 is fixedly fixed to a third member 42 fixedly fixed to the third member 42 by means of welding GW, etc.; a cylinder 48 fixed to a placket 46 installed on the shaft 116; Thigh support device 120 that moves back and forth with a retractable stay 118
It becomes more.

124 is a projectile called Z such as Plumaflex suspended on the cushion frame 112; 126 is the projectile 1
24 is a cushion material covering the cushion material 12; 128 is the cushion material 12;
6, and 130 is the front end portion of the seat portion in which the storage portion 132 of the thigh support device 120 is recessed.

The thigh support device 120' is composed of a stay 118, two frames 134, a pad 136, and a skin 138. Since the present invention has such a configuration, the mode of operation of the present invention will be explained with reference to the embodiment shown in FIGS. 7 to 14.

2. First, when the handle 88 of the drive device 36 is rotated in the direction of the arrow shown in FIG. 8 and FIG. It is supported by and rotates. Due to this rotation, the biased D logic part 80 biases the first member 72 and rotates in the same direction, so that the internal gear 74 moves its meshing position with respect to the external gear 70 by the ratio of the number of teeth. The shaft 44 via the third member 42 fixed to the rotated first member 72,
Rotate 116. A bracket 46 fixed to the shafts 44, 116 allows the headrest 52 and/or the thigh support 120 to be rotated in the same direction as the rotation of the handle 88, i.e., for example, the headrest 52 can be rotated back and forth; 120 rotates up and down. At this time, the cushion material 56 and the like of the back member 30 and the cushion material 126 and the like of the seat portion 110 remain fixed to the back frame 32 and the seat frame 112, respectively. Further, both the headrest 52 and the thigh support device 120 are attached to the stay 50.
, 118, and is slidable on the cylindrical body 48, so that it can freely move up and down or forward and backward from the recess 64 of the back support 30 or the recess 132 of the seat 110.

Other embodiments of the support member of the present invention include a temporal support device that is attached to the upper part of both sides of the back and rotates, and a temporal support device that is attached to the lower side of both sides of the back and rotated. Although there are lumbar support devices, police officer support devices that are attached to both sides of the seat and rotate, etc., for the sake of simplicity, the headrest and thigh support devices have been described above as representative examples.

Therefore, the present invention has the following effects.

[E] The support members, such as the headrest and thigh support device, are not directly rotated by the shaft that is the center of the rotation (of course, the drive device rotates the shaft), but is rotated via the stay. Therefore, the amount of rotational movement of the support member is large, in other words, the adjustment allowance is large.

[o} Since the rotation center of the support member is outside the support member, the amount of rotation of the support surface (the amount of rotation of the surface itself, not the amount of movement) is small, so the range suitable for supporting the support surface is large.

In the case of a support member, such as a headrest, a driving device is provided on the back frame, so by covering both sides of the support member, the protrusion of the support member can be removed and a sense of unity with the seat can be obtained. .

B. In the case of a support member, such as a headrest, it can be freely adjusted up and down and forward and backward, so it can be easily adjusted to a comfortable position suitable for each different head shape.

(Mura) Support members, such as thigh support devices, can be adjusted up and down and forward and back, so even if you have different physiques such as long or short legs, you can easily adjust them to provide good support for your thighs. can.

Further, since only the thigh support device can be adjusted and the hip point does not change at all, there is no need to readjust the inclination of the inside mirror or the like related to the hip point. death,
. N Since the drive device is an internal gear, the support part, e.g. headrest,
Adjustment is easy because the thigh support device rotates.

Further, unless the handle is turned, both gears remain in mesh with each other, so there is no particular need for a gear stopping mechanism.
In addition, the rotational force of the handle is transmitted smoothly and efficiently. Furthermore, the drive device itself can be made smaller and lighter.

[Brief explanation of the drawing]

Figures 1, 2, 4, and 5 are perspective, partially cutaway explanatory views of the backrests of seats in different subordinate examples, and Figure 3 is an enlarged illustration of part m in Figures 1 and 2. 6 is an explanatory side view of a conventional seat with a thigh support function, FIG. 7 is an explanatory side view of a backrest according to an embodiment of the present invention, and FIG. 8 is a part of FIG. 9 is an explanatory view of arrow K in FIG. 8; FIG. 10 is an explanatory front view of the coupling device 36; FIG. 14 are perspective explanatory views of a seat portion according to another embodiment of the present invention, and FIG. 13 is an enlarged perspective explanatory view of the surroundings of the bracket 46. 30... Back mackerel, 32... Back frame, 34...
・・・・・・Side bracket, 36・・・・・・
...Drive device, 42...Third member, 44
,116... ...Shaft, 46...Bracket, 48...Cylinder, 50,118...Stay, 52
......Headrest, 54,124...
Bullet, 56,126... Cushion material, 58,12
8... Outer cover cloth, 64, 132... Storage section, 70
......Internal gear, 72...First member, 74...External gear, 76...
...Second member, 78...Shaft portion, 80...
...... Eccentric ring part, 82 ... ... Shaft with eccentricity, 86 ...... Screw, 88 ... ... Handle,
90... Flat washsha, 94... Plate, 102...
...Arm part, 110... Seat part, 112
......Cushion frame, 120...
...Thigh support device. Many 2 drawings friend 2 drawings many 2 drawings many 9 drawings

Claims (1)

[Claims] 1. A first member on which an internal gear is formed, a second member on which an external gear meshing with the internal gear is formed, and the first member and the second member.
A drive device comprising a shaft with an eccentric wheel, in which one of the members is rotatably supported on a shaft portion and the other member is rotatably supported on an eccentric wheel portion eccentric to the shaft portion, and the internal and external gears mesh with each other. the second of
A member is fixed to one side of the frame, a third member is fixed to the first member rotated by the eccentric shaft, and a shaft fixed to the third member is rotatably supported on the other side of the frame, A bracket is fixed to the shaft, and a stay is slidably supported substantially orthogonally to the shaft by a cylindrical body fixed to the bracket, and a support member such as a headrest is supported relative to the seat by the stay. A vehicle seat characterized by being supported so as to appear and appear freely.