JPH09182642A - Reclining device for seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent stress concentration of a journal part of a seat side bracket and a backrest seat side bracket, miniaturize the device, facilitate the assembling, improve assembling accuracy, and improve the strength. SOLUTION: A circular fitting hole 31 having a circular arc gear 33 formed in its internal wall face 32 is formed in either one of a seat side bracket 1 or a backrest seat side bracket 34, and a fitting support and guide member 3 which is constituted of a pair of semicircular swelling parts composed of support arc parts 6, which are fitted in the fitting hole 31 so as to make sliding contact with each other, and guide straight line parts 5, which are parallel to the radial direction passing the center of the fitting hole 31, is formed in either the other of the seat side bracket 1 or the backrest seat side bracket 34. A lock sliding groove 8 in which a sliding lock member 7 detachably attached to the circular arc gear 33 is fitted is formed between the guide straight line parts 5 of a pair of swelling parts 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat reclining device for adjusting a tilt angle of a backrest sheet.

[0002]

2. Description of the Related Art In Japanese Patent Laid-Open Publication No. 7-204047, which is publicly known, a seat seat side bracket and a backrest seat side bracket are rotatably mounted on a horizontal shaft, and the horizontal shaft is attached to the seat seat side bracket. A reclining device for a seat is described in which a circular arc gear that forms the center is formed, and a sliding lock member that moves in the radial direction of the horizontal axis and is connected to and detached from the circular arc gear is movably provided on the backrest seat side bracket. There is. In the conventionally known Japanese Patent Application Laid-Open No. 7-265154,
Either a seat-seat-side bracket or a backrest-seat-side bracket is formed with a circular fitting hole and an arc gear on the end face in the vicinity of the fitting hole, and either the seat-seat-side bracket or the backrest-side bracket is formed. On the other hand, a full-moon-shaped bulging portion having an arc portion concentric with the fitting hole and slidingly contacting the inner wall surface, and sliding sliding to and from the arc gear formed at a portion distant from the bulging portion. A one-side fitting member including a lock sliding groove into which the lock member is fitted is provided, and the fitting hole is sandwiched by another one-side fitting member having the same shape as the separately provided one-side fitting member. The seat reclining device configured as described above is described.

[0003]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. 7-204.
In the device described in Japanese Patent No. 047, since the seat seat side bracket and the backrest seat side bracket are axially attached by the horizontal axis, there is a problem that stress concentrates on the axial attachment portion. The device disclosed in Japanese Patent Laid-Open No. 7-265154 has a problem that the entire device becomes large because the lock member is provided at a position apart from the rotation center of the backrest seat side bracket. That is, when a fitting hole is formed in one of the seat-side bracket and the backrest seat-side bracket, and a fitting member is formed in the other, and the two members are attached to each other, the load can be strongly supported. This makes it difficult to provide the device in the hole, and the device cannot be miniaturized. The present invention makes it possible to improve the load supporting strength for supporting the shaft attachment portions of the seat-seat side bracket and the backrest-seat side bracket on the surface and to downsize the device.

[0004]

It is an object of the present invention to prevent stress concentration on the shaft attachment portions of the seat seat side bracket and the backrest seat side bracket, downsize the device, facilitate assembly, improve assembly accuracy, and improve strength.

[0005]

According to the present invention, a regular circular fitting hole 31 having an arc gear 33 formed on an inner wall surface 32 is provided in either one of the seat seat side bracket 1 and the backrest seat side bracket 34. The support arc portion 6 that is fitted into the fitting hole 31 and is in sliding contact with either the seat seat side bracket 1 or the backrest seat side bracket 34 is parallel to the radial direction passing through the center of the fitting hole 31. A fitting support / guide member 3 constituted by a pair of half-moon shaped bulging portions 4 composed of a guide straight line portion 5 is provided, and the arc gear 33 is connected between the guide straight line portions 5 of the pair of bulging portions 4. This is a seat reclining device in which a lock slide groove 8 into which a slide lock member 7 to be disengaged is fitted is formed. Further, in the reclining device for a seat according to the present invention, the other side support circular arc portion 40 which is fitted into the fitting hole 31 and slidably contacts with the fitting hole 31 and the fitting hole 31 separately from the fitting support / guide member 3.
On the other side of the guide straight portion 38 parallel to the radial direction passing through the center of
The other side fitting support / guide member 36 constituted by a pair of half-moon shaped other side bulging portions 37 is provided, and is connected to the arc gear 33 between the guide linear portions 38 of the pair of bulging portions 37. A lock slide groove 8 into which the sliding lock member 7 to be removed is fitted is formed, and the fitting hole 31 is sandwiched by the fitting support / guide member 3 and the other side fitting support / guide member 36. The seat reclining device configured as described above. Further, in the reclining device for a seat according to the present invention, the fitting support / guide member 3 and the other side fitting support / guide member 36 include a bulging surface 10 of the bulging portion 4 and a bulging surface 37 of the other side. This is a seat reclining device in which the other side bulging surface 42 is brought into contact with each other without a gap and fixed to each other by welding 43.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Is a seat-seat side bracket, which is fixed to the upper rail 2 that slides with respect to the lower rail of the slide rail fixed to the vehicle body side in the embodiment. The seat-side bracket 1 is provided with a fitting support / guide member 3. The fitting support / guide member 3 has half-moon shaped bulging portions 4 and 4 that bulge laterally (left in the embodiment), and the bulging portion 4 has a straight guide portion 5 and a supporting arc portion 6. A guide slide portion 5 and a guide slide portion 5 are formed with a lock slide groove 8 on which a slide lock member 7 described later slides. Reference numeral 9 is one side plate portion corresponding to the groove bottom of the lock sliding groove 8 forming the lock sliding groove 8, and 10 is a bulging surface of the bulging portion 4. The insertion hole 13 is formed in the one side plate portion 9. The insertion hole 13 is arranged so as to be the center of the support arc portion 6, and the support arc portion 6 is formed in a perfect circle shape with the insertion hole 13 as the center. . In the vicinity of the insertion hole 13, a long arc-shaped elongated hole 14 centered on the insertion hole 13 is formed.

The sliding lock member 7 has a lock gear portion 16 formed on one surface in the sliding direction, and a substantially circular cam groove 17 having an opening at either the front or the rear is formed at an intermediate portion of the sliding lock member 7. The cam body 18 is fitted in the cam groove 17, the operation horizontal shaft 20 is inserted into the insertion hole 19 of the cam body 18, and the operation horizontal shaft 20 is inserted into the insertion hole 13 to mount the cam body 18 on the shaft. To do. The operation horizontal shaft 20 is rotatably mounted by inserting an insertion hole 22 formed in the base of the operation lever 21. An insertion hole 23 is formed in the operation lever 21, and the connection pin 26 is inserted by overlapping with the insertion hole 24 of the cam body 18, and the operation lever 21 is rotated to rotate the connection pin 26 about the operation horizontal shaft 20. By doing so, the cam body 18 is rotated about the operation horizontal shaft 20, and the slide lock member 7 is slid in the radial direction with respect to the operation horizontal shaft 20. 27 is a spring.

Therefore, the circular fitting holes 3 of the ring member 30 are formed on the outer circumferences of the supporting arc portions 6 of the bulging portions 4 and 4, respectively.
1 is fitted to the inner wall surface 32 of the fitting hole 31, and the lock gear portion 16 of the sliding lock member 7 is connected to and disengaged from the arc gear 33.
To form The ring member 30 is fixed to a backrest seat side bracket 34 fixed to the backrest seat side. Reference numeral 35 is a window hole having the same diameter as the fitting hole 31. Although it is possible to configure a seat reclining device by the fitting support / guide member 3 and the ring member 30, in this embodiment, the other side fitting support / guide member 36 is provided outside the ring member 30. . The other side fitting support / guide member 36 is
A half-moon shaped other side bulge 37 is formed, and the other side bulge 3 is formed.
The other side plate portion 39 that forms the lock sliding groove 8 is formed between the other side guide linear portions 38 of 7, 7, and the flange 41 is provided on the peripheral edge of the other side supporting arc portion 40 of the other side bulging portion 37.
To form 42 is a bulging surface on the other side.

That is, the other side fitting support / guide member 3
6 is formed in a paired relationship with the one side fitting support / guide member 3 (hereinafter, referred to as the other side fitting support / guide member 36 for comparison), and the sliding lock is formed by both. A sandwiching member A that sandwiches the member 7 and the like is configured. The sandwiching member A brings the other side bulging portion 37 of the other side fitting support and guide member 36 and the bulging portion 4 of the one side fitting support and guide member 3 into contact with each other without a gap, and welds 43 to each other. To do. Therefore, the bulging portion 4 and the other side bulging portion 37 are formed to have the same thickness as the width of the fitting hole 31, and the seat-seat side bracket 1 and the flange 41 are provided on the left and right side surfaces of the ring member 30 (note that, There is a backrest seat side bracket 34 on one surface of the member 30, but the ring member 30 and the backrest seat side bracket 34 are described as being integrated) to make the inside of the ring member 30 a substantially sealed space. To form.

Reference numeral 45 is an insertion hole formed in the center, and 46 is a long arc-shaped hole centering on the insertion hole 45. In the figure, 4
7 is a spring, 48 is a groove, 49 is a pin, 50 is a stopper, 51 is a transmission member for transmitting the operation to the other side, 51a is an insertion hole through which the operation horizontal shaft 20 is inserted, and 51b is the connection pin 26.
Is a through hole, and the transmission member 51 is a connecting pin 26.
Is rotated about the operation horizontal shaft 20 to operate the cam body on the opposite side. 8 and 9 show a second embodiment of the slide lock member 7 and the ring member 30, which are located on one side of the lock gear portion 16 at one end of the slide lock member 7 and on the radial center side of the lock gear portion 16. An arc-shaped contact surface 52 is formed, and an arc gear 33 is formed radially outward of the inner wall surface 32 of the ring member 30 so that the arc gear 33 does not slidably contact the bulging portion 4 and the other bulging portion 37. In this way, wear resistance is improved. That is, when the one side fitting support / guide member 3 and the other one side fitting support / guide member 36 are fitted to the ring member 30, the bulging portion 4 and the other side bulging portion 3 are fitted.
Since the contact surface 52 is in sliding contact with 7 and the arc gear 33 is not in sliding contact, wear can be prevented.

FIG. 10 shows the second fitting support / guide member 3 on one side and the second fitting support / guide member 36 on the other side.
This is an example, and the fitting hole 31 is formed in the seat-seat side bracket 1.
And an arc gear 33 is provided on the inner wall surface 32 of the fitting hole 31.
1, the one side fitting support / guide member 3 and the other side fitting support / guide member 36 are fitted and sandwiched, and the one side fitting support / guide member 3 is provided on the backrest seat side bracket 34 side. There is.

[0012]

Next, the operation will be described. The sliding lock member 7 is fitted in the lock sliding groove 8 of the fitting support / guide member 3, the cam body 18 is fitted in the cam groove 17 of the sliding lock member 7, and the insertion hole 19 of the cam body 18 is fitted in the insertion hole 19. The operation horizontal shaft 20 is skewed through the insertion hole 13 of the fitting support / guide member 3, and the connecting pin 26 inserted through the cam body 18 is axially mounted in the long hole 14. Next, the fitting hole 31 of the ring member 30 is fitted to the outer circumference of the supporting arc portion 6 of the bulging portions 4 and 4, and the base portion of the operation lever 21 is rotatably attached to the operation horizontal shaft 20 for operation. Connecting pin 26 on lever 21
And a spring 27 for urging the lock gear portion 16 to engage the arc gear 33 of the ring member 30 is attached between the operation lever 21 and the fixed portion, and the groove 48 of the operation horizontal shaft 20 is attached.
Assembling is completed when one end of the spring 47 is locked and the other end is locked to the pin 49.

When the operating lever 21 is rotated, the connecting pin 26 rotates clockwise about the operation horizontal shaft 20 in FIG. 1, and the connecting pin 26 rotates the cam body 18 clockwise about the operation horizontal shaft 20. The cam body 18 abuts on the cam groove 17 of the slide lock member 7 and slides the lock gear portion 16 so as to separate from the arc gear 33 of the ring member 30.
Therefore, the backrest seat side bracket 34 is freely rotatable with respect to the seat seat side bracket 1, and when the backrest seat side bracket 34 is adjusted in position to a desired angle and the operation lever 21 is released, the operation lever 21 is released. Is returned by the elastic force of the spring 27, and the connecting pin 26 also rotates about the operation horizontal shaft 20. Therefore, the connecting pin 26 rotates the cam body 18, and the slide lock member 7 engages the lock gear portion 16 with the arc gear 33. Slide it in and lock it.

In this case, the inner wall surface 32 of the fitting hole 31 of the ring member 30 fixed to the backrest seat side bracket 34 is slidably contacted with the supporting arc portion 6 of the bulging portion 4 of the fitting / supporting guide member 3 to rotate. Therefore, the load applied to the backrest seat side bracket 34 is applied to the bulging portion 4 through the fitting hole 31, and the bulging portion 4
Since the load is supported by the surface of the supporting arc portion 6, it is firmly supported. Therefore, the weight of members such as the seat-seat-side bracket 1 and the backrest-side bracket 34 can be reduced to reduce the weight.

Therefore, the arc gear 33 is formed on the inner wall surface 32 of the ring member 30, and the lock slide groove 8 of the slide lock member 7 is formed in the radial direction passing through the center of the ring member 30.
Since the slide lock member 7 is fitted in the lock slide groove 8, the lock mechanism can be made compact. In this case, since the lock slide groove 8 is formed between the guide straight line portions 5 of the pair of bulging portions 4, the side edges of the slide lock member 7 are in sliding contact with the guide straight line portions 5, so that the sliding Guide and slide securely. Therefore, the fitting support / guide member 3 having the guide straight line portion 5 also functions as a guide for the slide lock member 7, is easy to manufacture without any special assembly / assembly, and contributes to cost reduction, size reduction, and weight reduction. There is.

Further, the lock gear portion 1 of the sliding lock member 7
6 engages with the circular arc gear 33 not by circular arc movement but by linear sliding with the lock sliding groove 8, so that all gears mesh at one time and meshing is sure, and the occurrence of tooth jumping is also prevented. To do. Accordingly, the other side fitting support / guide member 36 in a paired relationship with the fitting support / guide member 3 is provided separately from the fitting support / guide member 3 and the one side fitting support / guide member 3 and the other side. The fitting support / guide member 36 constitutes a sandwiching member A for sandwiching the slide lock member 7 and the like, and the sandwiching member A is formed by the bulging portion 4 of the one side fitting support / guide member 3 and the other side fitting support. Since the other side bulge portion 37 of the double guide member 36 is formed to have a thickness that fits into the fitting hole 31 of the ring member 30, the left and right sides of the ring member 30 are fitted and supported on the one side. The bulging surface 10 of the bulging portion 4 and the other bulging surface 4 of the other bulging portion 37 of the other side fitting support / guide member 36.
2 are brought into contact with each other and welded 43 to fix them.

Therefore, since the one side fitting support / guide member 3 and the other side fitting support / guide member 36 are brought into contact with each other without a gap and welded 43, the strength can be improved and a large load can be supported. Further, when the one side fitting support / guide member 3 and the other side fitting support / guide member 36 contact the bulging surface 10 of the bulging portion 4 and the bulging surface 42 of the other side bulging portion 37, When the one-side fitting support / guide member 3 and the other-side fitting support / guide member 36 are displaced relative to each other in the radial direction, a production error can be corrected and the operation becomes smoother. Then, the circular gear 3 is formed on the inner peripheral surface of the ring member 30.
3, a radial lock slide groove 8 is formed between the one side fitting support / guide member 3 and the other side fitting support / guide member 36, and slides in the lock slide groove 8. Since the lock member 7 is fitted, the guide of the sliding lock member 7 can be easily configured.

That is, both side surfaces of the slide lock member 7 are sandwiched between the one side plate portion 9 and the other side plate portion 39, and both front and rear edges of the slide lock member 7 are sandwiched between the guide straight portion 5 and the other side guide straight portion 38. Therefore, the entire circumference of the slide lock member 7 is slidably contacted, and the slide lock member 7 is surely slid. Further, the fitting hole 31 has an outer surface of the bulging portion 4 and the other side bulging portion 37.
Are engaged with each other, and the lock sliding groove 8 is formed on the inner wall surface 3 of the ring member 30
2, and the left and right side surfaces of the ring member 30 (note that
A backrest seat side bracket 34 is provided on one surface of the ring member 30.
There is a ring member 30 and a backrest seat side bracket 3
4 is described as a single body), the seat seat side bracket 1 and the flange 4 of the other side fitting support and guide member 36.
Since 1 is in sliding contact, the inside of the ring member 30 becomes a substantially sealed space. Therefore, since the slide lock member 7, the cam body 18, and the arc gear 33 in the fitting hole 31 are surrounded and not exposed, foreign matter is prevented from being caught and the operation is ensured.

In this case, the operating lever 21 and the cam body 18
Is rotatably concentrically mounted by the operation horizontal shaft 20, and the long hole 14 and the long hole 46 formed in each of the one side fitting support / guide member 3 and the other side fitting support / guide member 36.
Since they are connected by a connecting pin 26 penetrating through, they are sandwiched between the one side fitting support / guide member 3 and the other side fitting support / guide member 36, and the respective bulging portions 4, 3
The cam body 18 located on the inner side of the outer periphery of 7 can be operated by the operation lever 21 located on the outer side, and both the surface support by the fitting member and the miniaturization of the built-in cam body 18 can be achieved from the operation side. Have secured.

[0020]

[Effect] According to the present invention, the inner wall surface 3 is provided on either one of the seat seat side bracket 1 and the backrest seat side bracket 34.
2 is provided with a circular fitting hole 31 in which an arc gear 33 is formed, and a supporting arc that is fitted into the fitting hole 31 and slidably contacts either the seat seat side bracket 1 or the backrest seat side bracket 34. Fitting support and guide member 3 composed of a pair of half-moon shaped bulges 4 each of which is composed of a portion 6 and a guide straight portion 5 which is parallel to the radial direction passing through the center of the fitting hole 31.
The seat reclining device is provided with a lock slide groove 8 into which the slide lock member 7 that connects and disconnects with the arc gear 33 is formed between the linear guide portions 5 of the pair of bulging portions 4. Therefore, the load applied to the backrest seat side bracket 34 is applied to the bulging portion 4 through the fitting hole 31, and the bulging portion 4 supports the load on the surface of the supporting arc portion 6, so that it is firmly supported. Therefore, it is possible to reduce the weight of members such as the seat-seat side bracket 1 and the backrest-side bracket 34 to reduce the weight, and the fitting hole 31 is also provided.
Since the lock slide groove 8 of the slide lock member 7 is formed in the radial direction passing through the center of the slide lock member 7 and the slide lock member 7 is fitted in the lock slide groove 8, the lock mechanism can be made compact. Moreover, since the lock slide groove 8 is formed between the guide straight line portions 5 of the pair of bulging portions 4, the side edge of the slide lock member 7 slidably contacts the guide straight line portion 5. Guides the sliding and ensures the sliding, and therefore, the fitting support / guide member 3 having the guide straight line portion 5 also functions as the guide function of the sliding lock member 7, and is manufactured without special assembly / assembly. It is easy and has the effect of contributing to cost reduction and size and weight reduction. Further, in the reclining device for a seat according to the present invention, the other side support circular arc portion 40 which is fitted into the fitting hole 31 and slidably contacts with the fitting hole 31 and the fitting hole 31 separately from the fitting support / guide member 3. The other side fitting support and guide member 36 constituted by a pair of half-moon shaped other side bulging portions 37 formed of the other side guide straight portion 38 parallel to the radial direction passing through the center of the pair of bulging portions is provided. A lock slide groove 8 into which the slide lock member 7 that connects to and disconnects from the arc gear 33 is fitted is formed between the guide linear portions 38 of 37, and the fitting hole 31 is formed.
Is a seat reclining device configured to be sandwiched between the fitting support / guide member 3 and the other side fit support / guide member 36.
Since 1 can be supported from both sides, the supporting strength can be improved, and since the slide lock member 7 is also supported and guided from both sides, the operation can be ensured. In the seat reclining device of the present invention, the fitting support / guide member 3 and the other side fitting support / guide member 36 may be
This is a seat reclining device in which the bulging surface 10 of the bulging portion 4 and the other-side bulging surface 42 of the other-side bulging portion 37 are brought into contact with each other with no gaps and fixed to each other by welding 43. When the bulging surface 10 and the other side bulging surface 42 are displaced relative to each other in the radial direction, production error can be corrected.
It has the effect of smoothing the operation.

[Brief description of the drawings]

FIG. 1 is an overall exploded perspective view.

FIG. 2 is a vertical sectional side view.

FIG. 3 is a side view of the seat without a seat-side bracket.

FIG. 4 is a cross-sectional plan view of the same.

FIG. 5 is a cross-sectional plan view of the fitting member of the seat-seat-side bracket.

FIG. 6 is a cross-sectional plan view of a ring member and a backrest seat side bracket.

FIG. 7 is a cross-sectional plan view of the other side fitting member.

FIG. 8 is a second embodiment of a sliding lock member.

FIG. 9 is a partial perspective view of a second embodiment of the ring member.

FIG. 10 is an exploded perspective view of a second embodiment of a seat reclining device.

[Explanation of symbols]

1 ... Seat seat side bracket 2 ... Upper rail 3
... fitting member, 4 ... bulging part, 5 ... straight part, 6 ... arc part, 7
... Sliding lock member, 8 ... Lock sliding groove, 9 ... One side plate portion, 10 ... Bulging surface, 13 ... Insertion hole, 14 ... Long hole, 16 ...
Lock gear part, 17 ... Cam groove, 18 ... Cam body, 19 ... Insertion hole, 20 ... Horizontal shaft, 21 ... Operation lever, 26 ... Pin, 2
7 ... Spring, 30 ... Ring member, 31 ... Fitting hole, 32 ... Inner wall surface, 33 ... Arc gear, 34 ... Backrest seat side bracket, 36 ... Other side fitting member, 37 ... Other side bulging part, 38
... other side linear part, 39 ... other side plate part, 40 ... other side arc part, 41 ... flange, 43 ... welding, 45 ... insertion hole, 46
... elongated hole, 47 ... spring, 48 ... groove, 49 ... pin, 50 ... stopper, 51 ... transmission member, 52 ... contact surface.

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[Procedure amendment]

[Submission date] February 14, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG. 4

[Figure 5]

FIG.

[Fig. 2]

[Figure 3]

FIG. 6

FIG. 7

[Figure 8]

[Figure 9]

FIG. 10

Claims (3)

[Claims] 1. A seat hole side bracket 1 or a back seat seat side bracket 1 or a back seat seat side bracket 34 is provided with a regular circular fitting hole 31 in which an arc gear 33 is formed on an inner wall surface 32. A half moon consisting of a supporting arc portion 6 that is fitted into the fitting hole 31 and is in sliding contact with the other of the seat-side brackets 34, and a guide straight line portion 5 that is parallel to the radial direction passing through the center of the fitting hole 31. A fitting support / guide member 3 configured by a pair of bulging portions 4 having a shape is provided, and a sliding lock member 7 that is connected to and detached from the arc gear 33 is provided between the linear guide portions 5 of the pair of bulging portions 4. A seat reclining device having a lock sliding groove 8 formed therein. 2. The other side support circular arc portion 40 which is fitted into the fitting hole 31 and slidably contacts the center of the fitting hole 31 separately from the fitting support and guide member 3. The other side fitting support / guide member 36 constituted by a pair of half-moon shaped other side bulging portions 37 composed of the other side guide linear portions 38 parallel to the passing radial direction is provided, and the pair of bulging portions 3 are provided.
A lock slide groove 8 into which the slide lock member 7 that connects to and disconnects from the circular arc gear 33 is fitted is formed between the guide straight line portions 38 of the guide gear 7, and the fitting hole 31 is formed into the fitting support and guide member 3. A seat reclining device configured to be sandwiched by the other side fitting support / guide member 36. 3. The fitting support / guide member 3 and the other side fitting support / guide member 36 according to claim 2, wherein the bulge surface 10 of the bulge portion 4 and the other side bulge portion of the other side bulge portion 37. A seat reclining device in which the projecting surface 42 is brought into contact with each other without a gap and is welded 43 to each other.