JP2004081345A - Seat reclining device - Google Patents

Abstract

An object of the present invention is to eliminate the work of locking a balance spring in a seat assembly line and reduce the number of work steps.
An internal gear (first attachment member) 3 attached to a seat back 132, a second attachment member 10 attached to a seat cushion 131, and a circular outer peripheral guide plate fixed to the second attachment member 10. (Holding member) 8, the internal gear 3 is rotatably fitted and supported by a guide plate 8 having a circular outer periphery, and the lock mechanism 7 is interposed between the internal gear 3 and the guide plate 8. In this state, the guide plate 8 is prevented from coming off by locking the outer peripheral edge of the internal gear 3 and the outer peripheral edge of the guide plate 8 with the ring member 2, and the balance spring 12 urges the seat back 132 in the forward tilt direction. The outer end 12a is locked by the hook 23 of the ring member 2, and the inner end 12b is locked by the hook 107 of the second mounting member 10. That.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a seat reclining device provided in a vehicle or the like, for example.
[0002]
[Prior art]
The reclining device as described above includes a first attachment member attached to the seat back side and a holding member fixed to a second attachment member attached to the seat cushion side, and the first attachment member is provided with a holding member. In a state in which the lock mechanism is rotatably fitted and supported by the member in the reclining direction and a lock mechanism capable of engaging and disengaging with the internal teeth of the first mounting member is interposed between the first mounting member and the holding member, (1) A ring member fixed to an attachment member in which a holding member is prevented from coming off has been proposed (JP-A-2000-333775).
[0003]
[Problems to be solved by the invention]
However, in the above reclining device, the inner end of the spiral balance spring is locked to the hook of the second mounting member on the seat cushion side, but the outer end is directly connected to the hook of the side frame of the seat back. Due to the need to lock, not only the locking workability in the sheet assembly line is poor, but also the number of working steps increases.
[0004]
In addition, a shaft member for rotating and holding an operation member for locking / unlocking the lock mechanism and a bearing structure for the shaft member are required, so that there is a problem that the cost is increased.
[0005]
SUMMARY OF THE INVENTION The present invention has been made to solve such a problem of the related art, and an object of the present invention is to provide a seat reclining apparatus capable of eliminating the work of locking a balance spring in a seat assembly line and reducing the number of working steps. And A second object of the present invention is to provide a seat reclining device capable of reducing costs by improving operation members.
[0006]
[Means for Solving the Problems]
The seat reclining device of the present invention includes a first attachment member attached to a seat back side, a second attachment member attached to a seat cushion side, and a holding member having a circular outer periphery fixed to the second attachment member. The first mounting member is rotatably fitted and supported by the outer peripheral holding member, and a lock mechanism capable of engaging and disengaging the inner teeth of the first mounting member by operating the operating member holds the first mounting member and the first mounting member. In a reclining device in which the holding member is prevented from coming off by locking the outer peripheral edge of the first mounting member and the outer peripheral edge of the holding member with a ring member in a state interposed between the seat back and the seat back, Is provided with a spiral balance spring that biases the spring in the forward tilt direction. The outer end of the balance spring is locked to the hook of the ring member, and the inner end is connected to the hook of the second mounting member. Sealed, characterized in that is.
[0007]
According to the reclining device of the present invention, in the reclining device assembly line, the outer end of the balance spring is locked to the hook of the ring member fixed (locked) to the first mounting member, and the inner end is fixed. In a seat assembly line, it is only necessary to attach the first attachment member to the seat back side and attach the second attachment member to the seat cushion side in the seat assembly line. Therefore, the work of locking the balance spring on the seat assembly line is eliminated, and the number of working steps can be reduced. Further, it is possible to perform an inspection for confirming the reliability of the balance spring by using the reclining device alone before attaching to the seat.
[0008]
The inner end of the spiral lock spring for urging the operating member in the locking direction is locked by the hook of the second mounting member, and the outer end is locked by the operating member. With this configuration, the inner end of the lock spring can be locked using the hook portion of the second attachment member that locks the inner end of the balance spring.
[0009]
As in claim 3, a gap is formed between the holding member and the second mounting member so that the operation member can be fitted therein, and a base shaft of the operation member is formed by a shaft hole of the holding member. When supported, the operating member can be compactly incorporated in the gap between the holding member and the second mounting member, and the base shaft of the operating member is supported by the shaft hole of the holding member. Since a shaft member such as a reclining device and a bearing structure of the shaft member are not required, the cost is reduced.
[0010]
According to a fourth aspect of the present invention, the operation member is configured such that an operation range is regulated by engaging a protrusion formed on the holding member with an arc hole formed on the operation member. The operation range of the operation member can be regulated using the protrusion.
[0011]
When a separate manual operation knob is fixed to the operation member, the manual operation knob suitable for the vehicle type can be fixed, so that the versatility of the reclining device is improved.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described.
[0013]
FIG. 1 is an exploded perspective view showing a reclining device for a seat according to the present embodiment, and FIG. 2 is a longitudinal sectional view showing the reclining device after assembly.
[0014]
The reclining device 1 is attached to a connection portion between a seat cushion frame 131 and a seat back frame 132 of a seat 130 provided in a vehicle.
[0015]
The seat back frame 132 has a plurality of (six at regular angular intervals on the circumference) mounting holes 132a formed around the reclining center hole 132b, and the seat cushion frame 131 has a plurality of mounting holes 132a. Screw holes 131a with weld nuts (two in the front and rear in this example) are formed.
[0016]
The reclining device 1 includes a ring member 2, an outer peripheral circular internal gear (first mounting member) 3, a lock mechanism 7 having a lock gear 5 and a cam 6, a peripheral outer circular guide plate (holding member) 8, , An operating lever (operating member) 9, a second mounting member 10, a lock spring 11 composed of a spiral spring, and a balance spring 12 composed of a spiral spring.
[0017]
The ring member 2 is formed in a substantially circular ring shape having a concave portion 21 into which the disk-shaped internal gear 3 is fitted. The outer peripheral wall 22 is formed in the concave portion 21 and a large-diameter hole in the bottom wall is formed. A cutout 26 is formed at an appropriate position of 24. A spring locking hook 23 is formed at a part of the upper end of the outer peripheral wall 22, and a notch 25 for caulking to be described later is formed at the upper end of the outer peripheral wall 22 excluding the hook 23. Formed in place.
[0018]
FIG. 3A is a front view of the internal gear 3, FIG. 3B is a side view, and FIG. 3C is a rear view. A circular projection 35 is formed to fit into the large-diameter hole 24 in the bottom wall of the ring member 2, and the circular projection 35 engages with the notch 26 of the ring member 2 to prevent rotation. 36 are formed at a plurality of locations. A projection 32 is formed on the inner end surface of the circular projection 35 to be inserted into the mounting hole 132 a of the seat back frame 132.
[0019]
A concave portion 33 is formed on the front surface of the internal gear 3, and internal teeth 34 are formed on the inner peripheral surface of the concave portion 33. A pair of lock gears constituting the lock mechanism 7 are provided inside the concave portion 33. 5 and a cam 6 are housed.
[0020]
4A is a front view at the time of locking, and FIG. 4B is a front view at the time of unlocking. The lock gear 5 is formed in a substantially U-shape and protrudes and retracts in the concave portion 33 in the radial direction. The lock gear 5 is movably guided, and has outer teeth 51 formed on the outer peripheral surface of the lock gear 5 so as to mesh with the inner teeth 34 when protruding.
[0021]
A cam 6 is arranged coaxially with a center hole 31 of the internal gear 3, and an oval center hole 61 is formed in the cam 6.
[0022]
When the cam 6 is in the left rotation position in FIG. 4A, the lock gear 5 is protruded and moved to a locked state in which the external teeth 51 mesh with the internal teeth 34 of the internal gear 3, and the cam 6 in the right rotation position in FIG. At the rotation position, the lock gear 5 is retracted to bring the external teeth 51 into an unlocked state in which the external teeth 51 do not mesh with the internal teeth 34 of the internal gear 3.
[0023]
A center hole 81 is formed in the disc-shaped guide plate 8, and a fitting concave portion 84 is formed in the inner end surface of the guide plate 8 to rotatably support the outer peripheral portion of the internal gear 3. ), A mounting step 83 is formed on the outer peripheral edge, and a plurality of (four at equal angular intervals on the circumference in this example) projections 82 are formed around the center hole 81 on the outer end surface. ing.
[0024]
The guide plate 8 is fitted in the concave portion 21 of the ring member 2 so as to overlap with the internal gear 3, that is, the outer peripheral edge of the internal gear 3 is locked in the concave portion 21 of the ring member 2. In this state, the upper end of the outer peripheral wall 22 between the notches 25 of the ring member 2 is bent inward and locked by caulking to the mounting step 83, thereby being prevented from slipping out. Become like The crimping state of the ring member 2 is set so as not to cause resistance of the relative rotation between the internal gear 3 and the guide plate 8.
[0025]
The operation lever 9 is composed of two parts, an L-shaped bent lever body 9A and an arc-shaped curved hand operation knob 9B, and the hand operation knob 9B is attached to the mounting portion 97 of the lever body 9A. The mounting portions 98 are overlapped, and the overlapped portions are integrally connected by welding or the like.
[0026]
The lever main body 9A is formed with a convex portion (base shaft portion) 91 that protrudes so as to be rotatably fitted in the center hole 81 of the guide plate 8, and as shown in FIG. An oval center hole 94 is formed at the bottom. The oval center hole 94 projects in a burring shape in the direction of the cam 6, and the projection 93 fits into the oval center hole 61 of the cam 6. Become like With such a fitting structure, the play between the lever main body 9A and the cam 6 is reduced, and the synchronization of the reclining device 1 at the left and right positions described below is ensured.
[0027]
As shown in FIGS. 1, 2, and 7, the oval end 133a of the connecting rod 133 provided for connecting the reclining device 1 at the left and right positions of the seat 130 is formed in the center hole of the seat back frame 132. The center hole 31 of the internal gear 3 is loosely fitted from 132b to engage with the oval center hole 94 of the lever body 9A fitted to the oval center hole 61 of the cam 6. That is, the cam 6 of the reclining device 1 at the left and right positions and the lever main body 9A are connected so as to be interlocked via the connecting rod 133.
[0028]
The second mounting member 10 is provided with a circular plate portion 101 having a center opening 103 formed therein, and a mounting bracket portion 102 is provided below the circular plate portion 101. A bolt insertion hole 105 is formed which matches the screw hole 131a with a weld nut of the seat cushion frame 131.
[0029]
As shown in FIGS. 1 and 6, the circular plate portion 101 is formed with the same number of burring projections 104 as the projections 82 fitted to the projections 82 of the guide plate 8. The circular plate portion 101 sandwiches the lever main body 9A of the operation lever 9 with a gap in a state of being fitted to the projection 82 of the guide plate 8, and a convex portion (base shaft portion) 91 from the center hole 81 of the guide plate 8 described above. Will be held so as not to come off. An arc hole 96 is formed in the lever main body 9A, and the arc hole 96 is engaged with one of the burring-shaped projections 104 of the second mounting member 10 which is externally fitted to the projection 82 of the guide plate 8. The rotation operation range of the operation lever 9 can be restricted.
[0030]
At the inner edge of the center opening 103 of the circular plate portion 101, a spring hook portion 107 that rises outward is formed.
[0031]
The outer end 12a of the balance spring 12 is locked by the hook 23 of the ring member 2, and the inner end 12b is locked by the hook 107 of the second mounting member 10. 12, the seat back frame 132 is biased forward.
[0032]
The inner end 11b of the lock spring 11 is locked by the hook 107 of the second mounting member 10, and the outer end 11a is locked by the operation lever 9. 9 is urged in the locking direction.
[0033]
In the reclining device 1 in the left and right position shown in FIG. 7, the operation lever 9 may be provided only in the reclining device 1 in the right position in FIG. 7, for example, and the operation lever 9 of the reclining device 1 on the left is shown in FIG. Thus, the hook portion 95 for locking the outer end 11a of the lock spring 11 may be formed on the lever body 9A.
[0034]
Next, an assembling procedure in the reclining device 1 of the present embodiment will be described.
[0035]
(1) The internal gear 3 is fitted into the concave portion 21 of the assembly line ring member 2 of the reclining device 1, and the circular projection 35 is fitted into the large-diameter hole 24. At this time, the projection 36 of the circular projection 35 is engaged with the notch 26 to prevent the ring member 2 from rotating.
[0036]
Next, the lock gear 5 and the cam 6 are accommodated in the fitting concave portion 84 of the guide plate 8 in a predetermined positional relationship, and subsequently, the ring member 2 is By bending the upper end of the outer peripheral wall 22 between the notches 25 inward and caulking the mounting step 83 of the guide plate 8, the internal gear 3 and the guide plate 8 move outward with respect to the ring member 2. You will be stopped. Thereby, the outer peripheral edge of the internal gear 3 and the outer peripheral edge of the guide plate 8 are locked by the ring member 2, so that the internal gear 3, the lock gear 5, the cam 6, and the guide plate 8 are unitized by the ring member 2. Will be done.
[0037]
Next, the projection (base shaft) 91 of the operation lever 9 is fitted into the center hole 81 of the guide plate 8, and the arc hole 96 of the operation lever 9 is loosely fitted into one of the projections 82 of the guide plate 8. .
[0038]
In this state, the burring-shaped projection 104 of the circular plate portion 101 of the second mounting member 10 is fitted onto the projection 82 of the guide plate 8. The burring projection 104 corresponding to the arc hole 96 of the operation lever 9 fits into the arc hole 96.
[0039]
Then, the burring-shaped projections 104 and the projections 82 are fixed by welding or the like. Thereby, the operation lever 9 is held so as not to come off between the guide plate 8 and the circular plate portion 101 of the second mounting member 10.
[0040]
Subsequently, the outer end 12 a of the balance spring 12 is locked to the hook 23 of the ring member 2, and the inner end 12 b is locked to the hook 107 of the second mounting member 10. The inner end 11b is engaged with the hook 107 of the second mounting member 10, and the outer end 11a is engaged with the operation lever 9.
[0041]
Thus, the ring member 2, the internal gear (first mounting member) 3, the lock mechanism 7 having the lock gear 5 and the cam 6, the guide plate (holding member) 8, the operation lever (operation member) 9, , The second mounting member 10, the lock spring 11, and the balance spring 12 are assembled in a unitized state.
[0042]
(2) Seat Back Frame 132 Welding Line The reclining device 1 unitized as described above is carried into the seat back frame 132 welding line.
[0043]
Then, the projection 32 of the internal gear 3 of the one reclining device 1 is fitted into the attachment hole 132a of the one seat back frame 132, and the projection 32 and the attachment hole 132a are fixed by welding or the like. Next, the connecting rod 133 is made to penetrate through the center hole 132b at the left and right positions of the seat back frame 132, and the one oval end 133a of the connecting rod 133 is moved through the center hole 31 of the internal gear 3 of the one reclining device 1. The cam 6 is engaged with the oval center hole 94 of the lever body 9A fitted to the oval center hole 61 of the cam 6.
[0044]
Thereafter, the projection 32 of the internal gear 3 of the other reclining device 1 is fitted into the attachment hole 132a of the other seat back frame 132, and the projection 32 and the attachment hole 132a are fixed by welding or the like. At the time of this fitting, the other oval end 133a of the connecting rod 133 loosely fits into the center hole 31 of the internal gear 3 of the other reclining device 1 and fits into the oval center hole 61 of the cam 6. 9A is engaged with the oval center hole 94.
[0045]
As a result, the cam 6 of the reclining device 1 at the left and right positions and the lever main body 9A are connected so as to be interlocked via the connecting rod 133.
[0046]
(3) Assembly line of the seat 130 With the seat back frame 132 inclined forward, the bolt insertion hole 105 of the mounting bracket portion 102 of the second mounting member 10 of the reclining device 1 is screwed with a weld nut with a weld nut of the seat cushion frame 131. The second mounting member 10 is fixed to the seat cushion frame 13 by inserting the bolt 13 (see FIG. 2) from the bolt insertion hole 105 and screwing it into the screw hole 131a with a weld nut so as to coincide with the 131a. become.
[0047]
Thereby, the seat back frame 132 is connected to the seat cushion frame 131 so as to be reclined by the reclining device 1 at the left and right positions.
[0048]
In the above embodiment, in the assembly line of the reclining device 1, the outer end 12a of the balance spring 12 is locked to the hook 23 of the ring member 2 fixed to the internal gear 3, and the inner end 12b is connected to the second mounting portion. In the welding line of the seat back frame 132, the internal gear 3 is attached to the seat back frame 132 by welding, and the second mounting is performed in the assembly line of the seat 130. Since the member 10 only needs to be attached to the seat cushion frame 131 with the bolts 13, there is no need to lock the balance spring 12 in the seat assembly line, and the number of working steps can be reduced. Further, before mounting the seat on the seat 130, the reclining device 1 alone can perform an inspection for checking the reliability of the balance spring 12.
[0049]
Further, since the inner end 11b of the lock spring 11 is locked to the hook 107 of the second mounting member 10 and the inner end 11a is locked to the operating member 9, the inner end 12b of the balance spring 12 is fixed. The inner end portion 11b of the lock spring 11 can be locked using the hook portion 107 of the second mounting member 10 to be locked.
[0050]
Further, the lever body 9A of the operation lever 9 is sandwiched between the guide plate 8 and the circular plate portion 101 of the second mounting member 10 by a burring-shaped projection 104 with a gap therebetween, and the protrusion (base shaft portion) of the operation lever 9 is provided. ) 91 is loosely supported by the center hole 81 of the guide plate 8, so that the operation lever 9 can be compactly incorporated in the gap between the guide plate 8 and the circular plate portion 101 of the second mounting member 10. Since the convex portion (base shaft portion) 91 of the operation lever 9 is supported by the center hole 81 of the guide plate 8, a shaft member such as a conventional reclining device and a bearing structure of the shaft member are not required, so that cost is reduced. Go down.
[0051]
Furthermore, the operation range of the operation lever 9 is regulated by engaging the arc hole 96 formed in the operation lever 9 with the burring-shaped projection 104 fitted to the projection 82 of the guide plate 8. Therefore, the operation range of the operation lever 9 can be restricted by using the projection 82 of the guide plate 8 and the burring-shaped projection 104.
[0052]
The operation lever 9 is composed of two parts, a lever body 9A and a hand operation knob 9B, and the hand operation knob 9B is integrally connected to the lever body 9A by welding or the like. In contrast, the manual operation knob 9B suitable for the vehicle type can be fixed, so that the versatility of the reclining device 1 is improved.
[0053]
【The invention's effect】
As described in detail above, according to the present invention, in the reclining device assembly line, the outer end of the balance spring is locked to the hook of the ring member fixed (locked) to the first mounting member, In the seat assembly line, the first mounting member is mounted on the seat back side, and the second mounting member is mounted on the seat cushion side in advance in a state where the inner end portion is engaged with the hook portion of the second mounting member. Therefore, the work of locking the balance spring in the seat assembly line is eliminated, and the number of working steps can be reduced. Further, it is possible to perform an inspection for confirming the reliability of the balance spring by using the reclining device alone before attaching to the seat.
[0054]
Further, when the inner end of the lock spring that urges the operating member in the locking direction is locked to the hook of the second mounting member and the outer end is locked to the operating member (claim 2), the inside of the balance spring The inner end of the lock spring can be locked using the hook portion of the second attachment member that locks the end.
[0055]
Further, a gap is formed between the holding member and the second mounting member so that the operation member can be fitted therein, and a base shaft of the operation member is supported by a shaft hole of the holding member. Since the operating member can be compactly incorporated in the gap between the holding member and the second mounting member, and the base shaft of the operating member is supported by the shaft hole of the holding member, a shaft member such as a conventional reclining device is used. This eliminates the need for a bearing structure for the shaft member, resulting in cost reduction.
[0056]
Furthermore, when the operating member is configured to regulate the operation range by engaging a projection formed on the holding member with an arc hole formed on the operation member (claim 4), the projection of the holding member is used. Thus, the operation range of the operation member can be regulated.
[0057]
Further, when a separate manual operation knob is fixed to the operation member (claim 5), the manual operation knob suitable for the vehicle type can be fixed, so that the versatility of the reclining device is improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a reclining device according to the present invention.
FIG. 2 is a longitudinal sectional view of the reclining device.
3A is a front view of the internal gear, FIG. 3B is a left side view, and FIG. 3C is a rear view.
FIGS. 4A and 4B are front views for explaining movements of a lock gear and a cam with respect to an internal gear.
FIG. 5 is a perspective view for explaining a state in which a cam and an operation lever are mounted.
FIG. 6 is a longitudinal sectional view showing a state of attachment between a second attachment member and a guide plate.
FIG. 7 is a perspective view showing the reclining device at the left and right positions.
FIG. 8 is a perspective view of an operation lever.
[Explanation of symbols]
Reference Signs List 1 reclining device 2 ring member 3 internal gear (first mounting member)
5 Lock gear 6 Cam 7 Lock mechanism 8 Guide plate (holding member)
9 Operation lever (operation member)
Reference Signs List 10 Second attachment member 11 Lock spring 12 Balance spring 12a Outer end 12b Inner end 23, 107 Hook for spring 34 Inner teeth 51 Outer teeth 130 Seat 131 Seat cushion frame 132 Seat back frame 133 Connect rod

Claims (5)

A first attachment member attached to the seat back side, a second attachment member attached to the seat cushion side, and a holding member having a circular outer circumference fixed to the second mounting member, wherein the first mounting member has a circular outer circumference A lock mechanism rotatably fitted to and supported by the holding member and capable of engaging and disengaging the internal teeth of the first mounting member by operating the operating member is interposed between the first mounting member and the holding member. In a reclining device in which the holding member is prevented from coming off by locking the outer periphery of the first mounting member and the outer periphery of the holding member with a ring member in the state,
A spiral balance spring for urging the seat back in the forward tilt direction is provided, and an outer end of the balance spring is engaged with a hook of the ring member, and an inner end thereof is a hook of the second mounting member. A seat reclining device which is locked to a part. 2. The spiral lock spring for urging the operating member in the locking direction has an inner end locked to a hook of the second mounting member and an outer end locked to the operating member. Seat reclining device. 2. A gap between the holding member and the second mounting member, in which the operation member can be fitted, is formed, and a base shaft of the operation member is supported by a shaft hole of the holding member. Or the reclining device for a seat according to 2. 4. The reclining seat according to claim 3, wherein the operating member is configured such that an operating range is regulated by engaging a protrusion formed on the holding member with an arc hole formed on the operating member. apparatus. The seat reclining device according to any one of claims 1 to 4, wherein a separate manual operation knob is fixed to the operation member.

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