JP2007117233A - Bracket angle adjuster - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bracket angle adjuster capable of reducing the cost by dispensing with an operation shaft and simplifying the connection between a wedge releasing member and a gear of an electric motor. <P>SOLUTION: In a seat 1, the front/rear tilt angle of a seat back 3 relative to a seat cushion 2 is adjusted by circulating a pair of wedge members 16A and 16B in a loosening direction by the rotating operation of the wedge releasing member 19 to change an engagement position of an internal gear 15 with an external gear 14, the outer circumferential part of the wedge releasing member 19 is rotatably fitted to and retains a large-diameter hole part 14c in the center of the external gear 14, and the wedge releasing member 19 is directly connected to a driving part of the electric motor 7 rotating the wedge releasing member 19. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an angle adjusting device for a bracket used for reclining a seat.

  Conventionally, as shown in FIG. 10A, for example, the first bracket 4 is attached to the seat cushion 2 of the vehicle seat 1, and the second bracket 5 is attached to the seat back 3. There is one in which the angle of the second bracket 5 of the seat back 3, that is, the front-back tilt angle of the seat back 3 is adjusted with respect to the first bracket 4 of the seat cushion 2 (Patent Document 1).

  Specifically, as shown in FIGS. 10B and 10C, the first bracket 4 has an external gear 4a, and the second bracket 5 has an internal gear having more teeth than the external gear 4a. 5a.

  Further, a large-diameter hole portion 4b at the center of the external gear 4a and a small-diameter shaft portion 5b at the center of the gear of the internal gear 5a, which are generated when the external gear 4a and the internal gear 5a are partially engaged with each other. A pair of wedge members 11A and 11B that are fitted into the eccentric space 10 therebetween, a spring member 12 that urges the pair of wedge members 11A and 11B in the biting direction, and a center hole 5c of the internal gear 5a are supported. And an operation shaft 6 having a wedge release portion 6a located between the biting tip portions of the pair of wedge members 11A and 11B.

  The electric motor 7 meshes an output shaft worm 7 a with a worm wheel 7 b and meshes a pinion 7 c of the worm wheel 7 b with a gear 9 fixed to the operation shaft 6.

  Then, the driving force of the electric motor 7 causes the worm 7a, the worm wheel 7b, the pinion 7c, and the rotation of the operation shaft 6 through the gear 9 to cause the wedge release portion 6a to couple the pair of wedge members 11A and 11B together with the spring member 12. By rotating around the eccentric space 10, the small-diameter shaft portion 5 b is eccentrically moved with respect to the large-diameter hole portion 4 b, and the meshing position of the internal gear 5 a with respect to the external gear 4 a is changed to change the first bracket 4 relative to the first bracket 4. 2 The angle of the bracket 5, that is, the front-back tilt angle of the seat back 3 is adjusted.

The operation shaft 6 having the first bracket 4, the second bracket 5, the pair of wedge members 11 </ b> A and 11 </ b> B, the spring member 12, and the wedge release portion 6 a is provided on the left and right portions of the seat 1. Are interlocked with a torque rod 13 for connecting the two.
JP 2001-340154 A

  However, in the angle adjusting device of Patent Document 1, since the operation shaft 6 having the wedge release portion 6a and the gear 9 rotated by the electric motor 7 are serration-coupled, there is a problem that the processing cost increases.

  The present invention has been made to solve the above-described problems, and eliminates the need for an operating shaft and simplifies the coupling between the wedge release member and the gear of the electric motor, thereby reducing the cost. An object of the present invention is to provide an angle adjusting device.

  In order to solve the above-described problems, the present invention provides a first bracket having an external gear, a second bracket having an internal gear having more teeth than the external gear, and the external gear and the internal gear. A pair of wedge members that fit into an eccentric space between the large-diameter hole portion of the gear center of the external gear and the small-diameter shaft portion of the gear center of the internal gear that are generated when the portions are meshed with each other; A spring member for urging the wedge member in the biting direction; and a wedge release member positioned between the biting tip portions of the pair of wedge members, wherein one of the first bracket and the second bracket is provided on the seat back side The other side is provided on the seat cushion side, and by rotating the wedge release member, the wedge release member rotates the pair of wedge members together with the spring member in the eccentric space in the loosening direction, thereby reducing the diameter of the large diameter hole portion. In the angle adjustment device for a bracket used for reclining a seat, which changes the meshing position of the internal gear with respect to the external gear while adjusting the eccentric angle of the seat back to adjust the angle of inclination of the seat back relative to the seat cushion. The outer periphery of the wedge release member is rotatably fitted and held in the large-diameter hole at the center of the external gear, and the drive portion of the electric motor that rotates the wedge release member is directly connected to the wedge release member. The angle adjustment device of the bracket is characterized in that it is connected to the bracket.

  A gear that meshes with the output pinion of the electric motor as in claim 2 is provided, and the gear and the wedge releasing member are positioned on the inner end side of the gear by positioning pins or pin holes on the wedge releasing member side. It is preferable that the gear is directly connected to the wedge release member by being inserted into the pin hole or the pin.

  A configuration in which a motor mounting bracket is fixed to the bracket provided on the seat cushion side and the outer end portion of the gear is rotatably fitted to the burring portion of the motor mounting bracket as in claim 3. It is preferable that

  According to a fourth aspect of the present invention, the first bracket, the second bracket, the pair of wedge members, the spring member, and the wedge release member are provided on the left and right sides of the seat, respectively, and the wedge release members on the left and right sides are connected with a torque rod. It is preferable that the drive part of the electric motor is directly connected to the wedge release member on either one of the left and right parts of the seat.

  According to a fifth aspect of the present invention, it is preferable that the right and left wedge release members and the torque rod are connected to the deformation hole of the wedge release member by inserting and fixing the deformed portion of the torque rod so as not to rotate. .

  According to a sixth aspect of the present invention, one of the first bracket and the second bracket is provided on the seat back side, and the other is provided on the seat cushion side, and the reclining of the seat is adjusted to adjust the tilt angle of the seat back relative to the seat cushion. It is preferable to adopt a configuration that is used in the above.

  According to the present invention, since the drive unit of the electric motor is directly connected to the wedge release member, the operation shaft as in Patent Document 1 is not necessary and is directly connected. Such serration coupling is not necessary, so that the cost can be reduced.

  In addition, since the outer periphery of the wedge release member is rotatably fitted and held in the large-diameter hole at the center of the gear of the external gear, the wedge-release member is stabilized by the large-diameter hole of the external gear. In addition to rotating, the wedge release member can be made large, so that the strength is improved. Furthermore, since the wedge release member can be easily processed by a press or the like, the manufacturing cost is reduced.

  According to the second aspect of the present invention, the inner end side of the gear on the electric motor side and the wedge release member can be directly and simply connected to the wedge release member simply by inserting the positioning pin into the positioning pin hole. can do.

  According to the third aspect, the inner end side of the gear on the electric motor side and the wedge release member are connected by inserting the positioning pin and the positioning pin hole, and the outer end portion of the gear is connected to the seat cushion side. The bracket is fixed so that it can be rotatably fitted to the burring part of the motor mounting bracket, so that the inner end of the gear is inserted into the wedge release member and connected to the outer end of the gear. By fitting the burring portion, it can be assembled in a stacked manner, so that the assemblability is improved. In addition, the positioning pin and the positioning pin hole can be integrally formed with the gear and the wedge release member, respectively, and the burring portion can be integrally formed with the motor mounting bracket, so the cost can be reduced by reducing the number of parts. .

  According to claim 4, the first bracket, the second bracket, the pair of wedge members, the spring member, and the wedge release member are provided on the left and right portions of the seat, respectively, and the wedge release members on the left and right portions are connected by the torque rod, By directly connecting the drive part of the electric motor to the wedge release member on either one of the left and right side parts of the seat, the stopper part of the seat back bracket is placed at the seat tilt position at the rearmost position and the frontmost position. Since the load from the electric motor only acts on the wedge release member on one side and does not act on the torque rod until the electric motor stops rotating after contacting the stopper part of the cushion bracket, It is not necessary to use a thick torque rod that can withstand high torque, and the torque rod can be reduced in weight and cost can be reduced.

  According to the fifth aspect, the wedge release member and the torque rod on the left and right sides can be easily and reliably connected to each other by simply inserting and fixing the deformed portion of the torque rod into the deformation hole of the wedge release member so as not to rotate. .

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. Note that portions having the same configuration and operation as those of the background art are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 1, while attaching the 1st bracket 4 to the seat cushion 2 of the vehicle seat 1, the 2nd bracket 5 is integrally provided in the lower part of the side frame 25 (refer FIG. 4) of the seat back 3, The driving force of the electric motor 7 adjusts the angle of the second bracket 5 of the seat back 3 with respect to the first bracket 4 of the seat cushion 2, that is, the front-back tilt angle of the seat back 3. The first and second brackets 4 and 5 and a gear unit U, which will be described later, are provided on the left and right portions of the seat 1 and are connected to each other by the torque rod 13 so that they are tilted back and forth in conjunction with each other. ing.

  As shown in FIGS. 3 and 7, which are cross-sectional views taken along line AA in FIGS. 2 and 2, the gear unit U presses a disk-shaped plate material from the outer surface to a convex shape, and external teeth 14 b (FIG. 8). And an internal gear 15 in which a disk-shaped plate material is pressed concavely from the inner surface to form inner teeth 15b (see FIG. 8) on the inner surface. As will be described later, after assembling as the gear unit U, the external gear 14 has a plurality of (six in this example) projections 14a on the outer surface fitted into the same number of positioning holes 4c in the first bracket 4. The internal gear 15 is attached to the first bracket 4 by welding or the like, and the internal gear 15 has a plurality of (six in this example) protrusions 15a (see FIG. 3) with the same number of positioning holes 5g (see FIG. 6) of the second bracket 5. To the second bracket 5 by welding or the like.

  The number of teeth of the internal teeth 15b of the internal gear 15 (50 in this example) is set to be larger than the number of teeth of the external teeth 14b of the external gear 14 (49 in this example) (see FIG. 8).

  A large-diameter hole portion 14c is formed at the gear center of the external gear 14, and a small-diameter shaft portion 15c protruding into the large-diameter hole portion 14c of the external gear 14 at the gear center of the internal gear 15. Is forming. The first bracket 4 has a hole 4e corresponding to the large-diameter hole 14c of the external gear 14, and the second bracket 5 has a hole corresponding to the small-diameter shaft 15c of the internal gear 15. A portion 5e (see FIG. 3) is formed.

  A holding ring member 22 that fits on the outer periphery of the disk-shaped plate material forming the external gear 14 is provided, and the internal gear 15 and the external gear 14 are sequentially fitted and held in the holding ring member 22. By laser welding the outer peripheral surface of the ring member 22 to the outer peripheral surface of the external gear 14, the external teeth 14b of the external gear 14 and a part of the internal teeth 15b of the internal gear 15 are engaged with each other in the outer gear. The toothed gear 14 and the internal gear 15 are assembled as a gear unit U that holds the toothed gear 14 and the internal gear 15 so as to be relatively rotatable.

  After the external gear 14 and the internal gear 15 are assembled as a gear unit U with the holding ring member 22, a pair of wedge members 16A and 16B, a spring member 18, a wedge release member 19 and the like are placed in the eccentric space 10 and the like which will be described later. Can be incorporated. The spring member 18 has an outer shape that fits inside the wedge release member 19. As shown in FIG. 3, the wedge release member 19 is fitted with the projection 14a of the external gear 14 in the positioning hole 4c of the first bracket 4 and attached to the first bracket 4 by welding or the like. It is pushed by the recessed portion 4f that is recessed together with the hole portion 4e of the 1 bracket 4 and is held so as not to come out of the large diameter hole portion 14c.

  As shown in detail in FIG. 8, when a part of the external teeth 14 b of the external gear 14 and a part of the internal teeth 15 b of the internal gear 15 are engaged with each other, the inside of the large-diameter hole portion 14 c of the external gear 14. An eccentric space 10 between the circumference and the outer circumference of the small-diameter shaft portion 15c of the internal gear 15 is generated, and a pair of wedge members 16A and 16B are fitted in the eccentric space 10.

  Each wedge member 16A, 16B includes an outer circular arc surface 16a substantially along the inner peripheral circular arc surface of the large-diameter hole 14c of the external gear 14 and an inner surface substantially along the outer peripheral circular arc surface of the small-diameter shaft portion 15c of the internal gear 15. The circular arc surface 16b is formed, and the front end portion 16c side is narrow and the rear end portion 16d side is wide.

  A substantially Ω-shaped spring member 18 formed in an outer shape smaller than the inner circumference of the large-diameter hole portion 14c of the external gear 14 is provided, and one end portion 18a of the spring member 18 is provided behind one wedge member 16A. The other end portion 18b is locked to the recess portion 16e of the rear end portion 16d of the other wedge member 16B while the other end portion 18b is locked to the recess portion 16e of the end portion 16d. By this spring member 18, each wedge member 16 </ b> A, 16 </ b> B bites in the eccentric space 10 between the inner periphery of the large-diameter hole portion 14 c of the external gear 14 and the outer periphery of the small-diameter shaft portion 15 c of the internal gear 15. Will be energized.

  A bottomed cylindrical wedge release member 19 that is rotatably fitted to the inner periphery of the large-diameter hole portion 14c of the external gear 14 is provided, and a torque rod 13 described later is provided on the bottom portion 19c of the wedge release member 19. A deformation hole 19d and a pair of positioning pin holes 19i are formed so that the deformation portion 13a cannot be rotated.

  The pair of arc-shaped wedge release portions 19e of the wedge release member 19 is located between the leading end portions 16c of the wedge members 16A and 16B. For example, in FIG. 8, the wedge release member 19 is moved clockwise. When the wedge release portion 19e is rotated, the one end portion 19f of the wedge release portion 19e abuts on the distal end portion 16c of the wedge member 16A, and when the wedge release member 19 is rotated counterclockwise, the other end portion 19g of the wedge release portion 19e. The wedge member 16B comes into contact with the tip 16c. The wedge release member 19 is rotatably fitted to the inner periphery of the large-diameter hole portion 14c of the external gear 14 by the wedge release portion 19e and the arcuate portion 19h at the opposite position.

  Referring to FIG. 3, the deformed portion 13 a of the torque rod 13 includes a hole portion 15 e of the small-diameter shaft portion 15 c of the internal gear 15 from a hole portion 5 e of the second bracket 5 provided on the left and right portions of the seat 1. It is loosely engaged and engaged with the deformation hole 19d of the wedge release member 19 so that it cannot rotate.

  The torque rod 13 interlocks the first and second brackets 4 and 5 and the gear unit U provided on the left and right portions of the seat 1, and has deformed portions 13a at both ends. In this example, the deformed portion 13a is formed in an oval shape by crushing the pipe-shaped torque rod 13 from both sides. In accordance with this, the deformation hole 19d of the wedge release member 19 is an oval hole.

  The deformation hole 19d of the wedge release member 19 and the deformation portion 13a of the torque rod 13 are oval, but may be polygonal or other shapes. Further, the torque rod 13 can be formed only by the deformed portion 13a and can be manufactured by extrusion or pultrusion molding. Further, in addition to engaging the deformation hole 19d and the deformation portion 13a so that the deformation portion 13a of the torque rod 13 cannot rotate in the deformation hole 19d of the wedge release member 19, the round hole of the torque rod 13 is inserted into the round hole of the wedge release member 19. It can also be caulked so that the shaft cannot be rotated. Further, a deformation shaft can be attached to the wedge release member 19 and a deformation hole can be formed in the torque rod 13 to engage the deformation shaft with the deformation hole. The wedge release member 19 can be easily manufactured by press-molding a metal plate, and can also be a zinc die cast or a plastic molded product.

  As shown in detail in FIG. 9A, when the deformed hole 19d of the wedge release member 19 and the deformed portion 13a of the torque rod 13 have an oval shape, a positioning pin 34c of the gear 34 is inserted as will be described later. The positioning pin hole 19i to be connected in the step is too close to the deformation hole 19d, and it is necessary to form a long hole shape cut from the deformation hole 19d at the time of press molding. For this reason, since the contact area of the deformation hole 19d with the deformation portion 13a is reduced, the contact t may be deformed by torsional force when the torque rod 13 rotates in the arrow direction, for example.

  On the other hand, as shown in detail in FIG. 9B, when the deformation hole 19d of the wedge release member 19 and the deformation portion 13a of the torque rod 13 have a drum shape, the positioning pin 34c of the gear 34 is inserted. The positioning pin hole 19i to be connected at the step is separated from the deformation hole 19d by an interval s, and can be formed into a round hole shape during press molding. Therefore, the contact area of the deformation hole 19d with respect to the deformation portion 13a increases, and therefore, when the torque rod 13 rotates, for example, in the direction of the arrow, there is no possibility that the contact t is deformed by a torsional force, which is advantageous.

  As shown in FIGS. 3, 5, and 6, the first bracket 4 on one side (left side in this example) of the seat cushion 2 of the vehicle seat 1 has a motor mounting bracket 31 and a plurality of screws 32. The electric motor 7 is attached to the motor mounting bracket 31 with a plurality of screws 33. Although not shown, the electric motor 7 includes a reduction gear including a worm and a worm wheel, and the worm wheel is provided with an output pinion 7c.

  A gear 34 is disposed in the gap between the first bracket 4 and the motor mounting bracket 31, and the inner end 34 a of the gear 34 is loosely fitted in the hole 4 e of the first bracket 4 with a gap. The outer end portion 34 b is rotatably fitted to the burring portion 31 a of the motor mounting bracket 31 via the bush 35. The gear 34 meshes with the output pinion 7 c of the electric motor 7.

  A pair of positioning pins 34c are formed to project from the inner end surface of the inner end portion 34a of the gear 34, and the positioning pins 34c are inserted into and connected to the bottom portion 19c of the wedge release member 19 opposite to the positioning pins 34c. A positioning pin hole 19i is formed. The deformed portion 13a of the torque rod 13 is loosely fitted in the center hole 34d of the gear 34 so as not to interfere. It is also possible to form a positioning hole in the gear 34 and form a positioning pin in the wedge release member 19.

  Then, by driving the electric motor 7, the gear 34 is rotated via the output pinion 7c, and the wedge release member 19 is rotated clockwise in FIG. 8, for example, via the positioning pin 34c and the positioning pin hole 19i. Then, one end 19f of the wedge release portion 19e comes into contact with the tip 16c of the wedge member 16A and is pushed in the clockwise direction, thereby loosening the wedge member 16A. When the wedge member 16A is pushed in the clockwise direction, the wedge member 16B is also pushed in the clockwise direction through the spring member 18.

  That is, the pair of wedge members 16 </ b> A and 16 </ b> B circulate in the loosening direction in the eccentric space 10 together with the spring member 18, so that the small-diameter shaft portion 15 c of the internal gear 15 corresponds to the large-diameter hole 14 c of the external gear 14. Since the meshing position of the inner teeth 15b with respect to the outer teeth 14b is changed while performing the eccentric motion, the angle of the second bracket 5 with respect to the first bracket 4, that is, the front-back tilt angle of the seat back 3 can be adjusted. The stopper plate 37 of the second bracket 5 of the seat back 3 comes into contact with the stopper portions 4g and 4h of the first bracket 4 of the seat cushion 2 at the most forward tilt position and the final tilt position of the seat back 3.

  If the bracket angle adjusting device used for reclining the vehicle seat 1 is configured as described above, the drive portion of the electric motor 7 (pinion 7c → gear 34 → positioning pin) is inserted into the positioning pin hole 19i of the wedge release member 19. 34c) is directly connected, so that the operation shaft as in Patent Document 1 is not necessary, and since it is directly connected, serration coupling as in Patent Document 1 is not required, thereby reducing the cost. It becomes possible to become.

  Further, since the outer peripheral portion of the wedge release member 19 is rotatably fitted and held in the large-diameter hole portion 14c at the gear center of the external gear 14, the wedge is held by the large-diameter hole portion 14c of the external gear 14. The release member 19 can be stably rotated, and the wedge release member 19 can be made large, so that the strength is improved. Further, since the wedge release member 19 can be easily processed by a press or the like, the manufacturing cost is reduced.

  Further, the inner end 34a side of the gear 34 on the electric motor 7 side and the wedge releasing member 19 are simply and reliably inserted into the wedge releasing member 19 simply by inserting the positioning pin 34c into the positioning pin hole 19i. Can be connected directly.

  The inner end 34a side of the gear 34 on the electric motor 7 side and the wedge release member 19 are connected by inserting the positioning pin 34c and the positioning pin hole 19i, and the outer end 34b of the gear 34 is Since the first bracket 4 on the seat cushion 2 side is rotatably fitted to the burring portion 31a of the motor mounting bracket 31 fixed, the inner end portion 34a side of the gear 34 is inserted and connected to the wedge release member 19 Then, by fitting the burring portion 31a of the motor mounting bracket 31 into the outer end portion 34b of the gear 34, it can be assembled in a stacked manner, so that the assembling property is improved. Further, the positioning pin 34c and the positioning pin hole 19i can be integrally formed with the gear 34 and the wedge releasing member 19, and the burring 31a portion can be integrally formed with the motor mounting bracket 31, thereby reducing the number of parts. Cost can be reduced.

  Further, the first bracket, the second bracket, the pair of wedge members, the spring member, and the wedge release member are provided on the left and right sides of the seat, respectively, and the wedge release members on the left and right sides are connected with torque rods, By directly connecting the drive part of the electric motor to the wedge release member on either side, the stopper part of the seat back bracket becomes the stopper of the bracket of the seat cushion at the rearmost position and the forwardmost position of the seat back. Since the load from the electric motor only acts on the wedge release member on one side and does not act on the torque rod until the electric motor stops rotating after contacting the part, it is thick enough to withstand high torque There is no need to use a torque rod, and the torque rod can be reduced in weight and cost can be reduced.

  Further, since the wedge release members 19 on the left and right sides of the seat 1 are connected by the torque rod 13, the stopper plate 37 of the second bracket 5 of the seat back 3 at the most forward tilt position and the last tilt position of the seat back 3. Until the electric motor 7 stops rotating after contacting the stoppers 4g and 4h of the first bracket 4 of the seat cushion 2, the load from the electric motor 7 is on one side (left side in this example). Since it only acts on the wedge release member 19 and not on the torque rod 13, it is not necessary to use a thick torque rod that can withstand high torque, and the torque rod 13 can be reduced in weight and cost can be reduced.

  Furthermore, by simply inserting and fixing the deformed portion 13a of the torque rod 13 into the deformed hole 19d of the wedge releasing member 19 so as not to rotate, the right and left wedge releasing members 19 and the torque rod 13 can be connected easily and reliably. it can.

  In the embodiment, the first and second brackets 4 and 5, the gear unit U, and the like are provided on the left and right portions of the seat 1, and are connected to each other by the torque rod 13 so that they are tilted forward and backward. However, according to the present invention, the first and second brackets 4 and 5 and the gear unit U are provided only on either one of the left and right sides of the seat 1, and the seat cushion 2 is provided on the other side. Of course, the present invention can also be applied to a vehicle seat 1 of a type in which only a bracket that connects the seat back 3 is provided and the left and right portions are not connected by the torque rod 13.

It is a side view of the vehicle seat which is an embodiment of the present invention. It is an enlarged side view of the angle adjustment apparatus of the vehicle seat of FIG. It is the sectional view on the AA line of FIG. It is a perspective view of the frame part of a seat back. It is a disassembled perspective view of the electric motor part of the frame part of a seat back. It is a principal part enlarged view of FIG. It is a disassembled perspective view of a gear unit or the like. It is a front view which shows the relationship between a wedge member and a wedge cancellation | release member. FIG. 4A is a plan view of an oval-shaped example, and FIG. 4B is a plan view of a drum-shaped example. It is a prior art, (a) is a side view of a sheet, (b) is a cross-sectional side view of an angle adjusting device, and (c) is a front view of an essential part of (b).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat cushion 3 Seat back 4 1st bracket 5 2nd bracket 7 Electric motor 7c Pinion (drive part)
10 Eccentric space 13 Torque rod 13a Deformed part (fixed part)
14 External gear 14b External tooth 14c Large diameter hole 15 Internal gear 15b Internal tooth 15c Small diameter shaft portion 16A, 16B Wedge member 18 Spring member 19 Wedge release member 19d Deformation hole (fixing hole)
19e Wedge release portion 19i Positioning pin hole 31 Motor mounting bracket 31a Burring portion 34 Gear (drive portion)
34a Inner end 34b Outer end 34c Positioning pin (drive unit)

Claims (6)

A first bracket having an external gear, a second bracket having an internal gear having more teeth than the external gear, and external teeth generated when part of the external gear and the internal gear are meshed with each other. A pair of wedge members that fit into an eccentric space between the large-diameter hole at the center of the gear of the gear and the small-diameter shaft at the center of the gear of the internal gear; and a spring member that biases the pair of wedge members in the biting direction A wedge release member positioned between the biting tip portions of the pair of wedge members, wherein the first bracket and the second bracket are provided on the seat back side and the other is provided on the seat cushion side, and the wedge is provided. By rotating the release member, the wedge release member rotates the pair of wedge members together with the spring member in the eccentric direction in the loosening direction so that the small-diameter shaft portion is eccentrically moved with respect to the large-diameter hole portion. By changing the engagement position of the internal gear which, in the angle adjusting device of the bracket used for reclining the seat to adjust the longitudinal inclination angle of the seat back relative to the seat cushion,
The outer periphery of the wedge release member is rotatably fitted and held in the large-diameter hole at the center of the external gear, and the wedge release member is provided with a drive unit for an electric motor that rotates the wedge release member. Bracket angle adjusting device characterized by being directly connected.   A gear meshing with the output pinion of the electric motor is provided, and the gear and the wedge releasing member are inserted into the positioning pin or pin hole on the inner end side of the gear into the positioning pin hole or pin on the wedge releasing member side. The angle adjusting device for a bracket according to claim 1, wherein the gear is directly connected to the wedge release member.   The motor mounting bracket is fixed to the bracket provided on the seat cushion side, and the outer end portion of the gear is rotatably fitted to a burring portion of the motor mounting bracket. The angle adjustment device of the bracket described in 1.   The first bracket, the second bracket, the pair of wedge members, the spring member, and the wedge release member are provided on the left and right sides of the seat, respectively, and the wedge release members on the left and right sides are connected with torque rods. The bracket angle adjusting device according to any one of claims 1 to 3, wherein the drive portion of the electric motor is directly connected to the wedge release member on one side.   5. The bracket according to claim 4, wherein the right and left wedge release members and the torque rod are connected to the deformation hole of the wedge release member by inserting and fixing the deformed portion of the torque rod so as not to rotate. Angle adjustment device.   One of the first bracket and the second bracket is provided on the seat back side, and the other is provided on the seat cushion side, and is used for reclining the seat to adjust the tilt angle of the seat back with respect to the seat cushion. The bracket angle adjusting device according to any one of claims 1 to 5, wherein:

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