CN212267280U

CN212267280U - Manual angle adjuster for automobile seat

Info

Publication number: CN212267280U
Application number: CN202022229557.6U
Authority: CN
Inventors: 邹耀忠
Original assignee: Jiangsu Zhongming Xianghe Seiko Co ltd
Current assignee: Jiangsu Zhongming Xianghe Seiko Co ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-01-01
Anticipated expiration: 2030-10-09

Abstract

A manual angle adjuster for an automobile seat belongs to the technical field of automobile seat accessories. Including the fluted disc, the fluted disc seat, encircle and encapsulate at the peripheral closed cover of fluted disc and fluted disc seat outer fringe, the setting drive block between fluted disc and fluted disc seat, the cam plate, return spring and two piece at least pinion racks and drive block pivoted driving piece, drive block and cam plate inlay and join in marriage integratively, the fluted disc seat is equipped with fluted disc seat boss at the side epirelief towards the fluted disc, the pinion rack is sliding fit between adjacent fluted disc seat boss, the locking block of the pinion rack locking block sliding fit on the cam plate removes the inslot of stepping down, the tooth of pinion rack meshes with the ring gear on the fluted disc mutually and joins in marriage, characteristics are: and a clearance eliminating block is arranged between the toothed plate and the toothed disc base boss, the clearance eliminating block is wedge-shaped, an inner support leg of the return spring is fixed on the driving block after the return spring passes through the cam plate, and an outer support leg of the return spring is fixed on the clearance eliminating block or between the clearance eliminating block and the toothed disc base boss. The advantages are that: eliminate the clearance, the part combines firmly, improves the reliability, operates steadily, the noise prevention.

Description

Manual angle adjuster for automobile seat

Technical Field

The utility model belongs to the technical field of the car seat accessory, concretely relates to manual angle modulation ware for car seat.

Background

The automobile seat is one of important safety parts of an automobile, the driving experience of a driver is directly influenced by the comfort degree of the automobile seat, the comfort degree of the automobile seat is influenced by the flexibility of the automobile seat and the height of the automobile seat and the inclination angle of the chair back, and the adjustment of the inclination angle of the chair back of the automobile seat is generally realized by controlling the engagement or the disengagement of the toothed plate and the toothed plate through a driving mechanism. At present, common automobile seat angle adjusting devices in the market mainly have a manual mode and an electric mode, the manual angle adjusting devices are deeply favored by consumers due to low cost and stable and reliable transmission, but the manual angle adjusting devices are generally high in assembly difficulty due to the fact that parts in the manual angle adjusting devices are large in number and precise in structure, and particularly springs are used as parts with frequent actions, and the situation that the parts cannot be reset due to fatigue is easy to occur after long-term use and bumping of a vehicle. In addition, a tooth block in the conventional manual angle adjusting device is generally arranged on a toothed disc seat in a sliding manner, and after the tooth block is worn for a long time, a large gap is easily formed between the toothed plate and the toothed disc seat to cause the situation of backrest shaking, so that the reliability of the action of the angle adjusting device is seriously influenced.

In the prior art, chinese patent application publication No. CN108749659A provides an angle adjusting device for an automobile seat, which includes a gear plate, a gear plate seat, a closed ring enclosing the outer peripheries of the gear plate and the gear plate seat, a driving mechanism disposed in the gear plate and the gear plate seat, and at least two gear plates, wherein the driving mechanism includes a driving block and a positioning plate, the gear plate has a driving abdicating hole at the center position and a positioning boss disposed at the periphery of the hole, the positioning plate is sleeved on the positioning boss through a central shaft hole, the driving block has a connecting flange at the center position and facing one side of the gear plate seat, a first opening is disposed on one side wall of the connecting flange, the gear plate seat has a gear plate seat hole at the center position, a second opening is disposed in the circumferential direction of the gear plate seat hole, the connecting flange of the driving plate is inserted in the gear plate seat hole, a spring is coiled between the gear plate seat hole and the connecting flange, and inner and outer legs of the spring are respectively clamped at the first opening, and, Within the second opening. The structure adopts a single spring and has the defect that the gap is generated between the toothed plate and the toothed plate seat after long-term use to generate vibration noise, and the single spring enables each disc to rotate unstably when the angle adjuster is adjusted.

In view of the above-mentioned prior art, there is a need for a reasonable improvement of the structure of the existing manual reclining device for an automobile seat. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

Disclosure of Invention

The task of the utility model is to provide a manual angle modulation ware for car seat, it can eliminate the clearance that the angle modulation ware produced because of wearing and tearing after long-term the use, guarantees to combine firmly between each part, improves the reliability of angle modulation ware, makes each rotating member rotate smoothly, operates steadily, the noise prevention.

The utility model discloses a task is accomplished like this, a manual angle modulation ware for car seat, fix the fluted disc seat, one that fluted disc one side was fixed in a fluted disc, a cooperation and encircle and envelope at fluted disc and the peripheral closed cover of fluted disc seat outer fringe, set up driving block, cam plate, return spring and two piece at least pinion racks between fluted disc and fluted disc seat to and drive driving block pivoted driving piece, driving block and cam plate mutually the embezzled one-tenth an organic whole, the fluted disc seat is equipped with fluted disc seat boss at one side of orientation fluted disc side epirelief, the pinion rack sliding fit between adjacent fluted disc seat boss, the locking block of pinion rack sliding fit on the cam plate on one side of pinion rack towards cam plate removes in the groove of stepping down, the tooth that sets up on the outward flange of pinion rack towards the fluted disc medial surface meshes with the ring gear on the fluted disc mutually, characteristics: the clearance eliminating block is arranged between the toothed plate and the toothed disc base boss, the clearance eliminating block is wedge-shaped, after the return spring penetrates through the cam plate, an inner support leg of the return spring is fixed on the driving block, and an outer support leg of the return spring is fixed on the clearance eliminating block or between the clearance eliminating block and the toothed disc base boss.

In a specific embodiment of the present invention, a spline hole is formed at a central position of the driving block, a central position of the cam plate is provided with a central hole of the cam plate, a transmission shaft abdicating hole is formed at a central position of the fluted disc, and a central hole of the fluted disc seat is formed at a central position of the fluted disc seat; the driving part comprises a driving part body and a driving part positioning sleeve ring, wherein the driving part body comprises a driving part flange plate pressed on the gear plate seat, a spline part matched with the spline hole to realize transmission and a transmission shaft matched with the transmission shaft abdicating hole; the driving piece body sequentially penetrates through the fluted disc seat central hole, the spline hole, the cam plate central hole and the transmission shaft abdicating hole, and then a driving piece positioning sleeve ring is screwed at the end part of the transmission shaft extending out of the transmission shaft abdicating hole, so that the locking installation of the fluted disc, the fluted disc seat and parts between the fluted disc and the fluted disc seat is realized.

In another specific embodiment of the present invention, a driving block flange is protruded from one side of the driving block facing the cam plate, and a driving block flange caulking groove for the driving block flange to be embedded into is formed at a position corresponding to the driving block flange of the cam plate.

In another specific embodiment of the present invention, the number of the return springs is two, and the two return springs are symmetrically coiled around the center of the cam plate on a side surface of the cam plate facing the fluted disc, and the cam plate is symmetrically provided with two return spring inner leg yielding holes and two return spring outer leg moving yielding grooves; a return spring inner supporting leg caulking groove is formed in the position, corresponding to the return spring inner supporting leg abdicating hole, of the driving block; and the inner support leg of the return spring is clamped in the inner support leg embedding groove of the return spring of the driving block after passing through the yielding hole of the inner support leg of the return spring of the cam plate, and the outer support leg of the return spring is clamped on the anti-backlash block or between the anti-backlash block and the fluted disc base boss after passing through the outer support leg moving yielding groove of the return spring of the cam plate.

The utility model discloses a still another concrete embodiment, the return spring hole of stepping down has been seted up on the clearance piece that disappears and fluted disc seat boss matched with face, fluted disc seat boss hole of stepping down has been seted up on the clearance piece matched with face of fluted disc seat boss, the hole that can supply return spring outer stabilizer blade card to establish is stepped down to the return spring hole of stepping down and fluted disc seat boss, the hole length in the hole of stepping down of fluted disc seat boss is greater than the hole length in the hole of returning spring hole of stepping down.

In still another specific embodiment of the present invention, the number of the anti-backlash blocks is two and is located at a single side of the toothed plate symmetrically around the center of the toothed plate seat.

In yet another specific embodiment of the present invention, the tooth plate is provided with a tooth plate locking block protruding from one side surface facing the cam plate, the cam plate is provided with a locking block moving abdicating groove for the tooth plate locking block to be embedded in, an inner wall of the groove near the outer side of the locking block moving abdicating groove is divided into a locking edge and a separating edge, and a distance from the locking edge to the center of the cam plate is greater than a distance from the separating edge to the center of the cam plate; the locking stop lugs with the same number as the tooth plates are uniformly distributed on the outer edge of the driving block, the tooth plates form stop lug grooves and tooth plate stop pins on one sides far away from teeth, and when the tooth plates are locked, the locking stop lugs and the tooth plate locking block are respectively matched with the tooth plate stop pins and the locking edges and push the tooth plates to slide outwards to lock the tooth plates; when the fluted disc and the toothed plate are unlocked, the locking stop lug and the toothed plate locking block are respectively matched with the stop lug groove and the separating edge and pull the toothed plate to slide inwards so as to unlock the toothed plate and the fluted disc.

In a more specific embodiment of the present invention, the number of the toothed plates is four, and two toothed plates are paired, and each pair of toothed plates is centrosymmetric around the center of the toothed plate seat.

The utility model discloses a and then a specific embodiment again, with the pinion rack locking piece on the clearance piece complex pinion rack for square, not for circular with the pinion rack locking piece on the clearance piece complex pinion rack.

In yet another specific embodiment of the present invention, the anti-backlash block is provided with a limiting post protruding from a side surface of the cam plate, the cam plate is provided with a step-down groove, the end of the step-down groove is provided with a limiting foot, and when the toothed plate and the toothed plate are disengaged, the limiting foot and the limiting post are engaged with each other.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has: firstly, the backlash eliminating block with the wedge-shaped structure is adopted, and the fluted disc is tightly meshed with the tooth block under the action of the spring force, so that the seat backrest is ensured to have no backlash. When the unlocking is carried out, the limiting groove on the cam plate can push the limiting column on the clearance eliminating block, so that the wedged tooth block is pushed loose, and the unlocking smoothness can be improved;

secondly, the anti-backlash block with the wedge-shaped structure is adopted, so that when the tooth plate and the tooth plate seat are worn to generate a gap in the long-term use process, the anti-backlash block eliminates the gap of the angle adjuster in a locking state in real time under the action of the return spring, all parts are firmly combined, vibration is prevented, and noise is eliminated;

thirdly, two return springs are adopted, so that the return force is balanced, the stability of a moving part is improved, the angle adjuster rotates smoothly, and the reliability is good;

fourthly, the driving part flange at one end of the driving part is pressed against the fluted disc seat, and the transmission shaft at the other end is in clearance fit with the receding hole of the fluted disc transmission shaft, so that the angle adjuster forms a relatively closed space and has the possibility of electrophoresis.

Drawings

Fig. 1 is an axonometric view of the manual recliner for automobile seats in one direction according to the present invention.

Fig. 2 is an axonometric view of the manual angle adjuster for the car seat in the other direction.

Fig. 3 is a plane cross-sectional view of the locking state of the manual angle adjuster for the car seat.

Fig. 4 is a plane cross-sectional view of the car seat with the manual angle adjuster in the unlocked state.

In the figure: 1. a fluted disc, 11. a transmission shaft abdicating hole and 12. a gear ring;

2. the gear disc seat comprises a gear disc seat, 21 gear disc seat central holes, 22 gear plate grooves, 23 gear disc seat bosses and 231 gear disc seat boss abdicating holes;

3. closing the sleeve;

4. the driving device comprises a driving piece, 41, a driving piece body, 411, a connecting part, 412, a driving piece flange plate, 413, a spline part, 414, a transmission shaft and 42, and a driving piece positioning sleeve ring;

5. the driving block, 51, the spline hole, 52, the driving block flange, 53, the return spring inner support leg caulking groove, 54, the locking stop lug;

6. the cam plate, 61, the cam plate center hole, 62, the locking block moving abdication groove, 621, the locking edge, 622, the separation edge, 63, the driving block flange embedding groove, 64, the abdication groove, 641, the limiting foot, 65, the return spring inner support abdication hole, 66, the return spring outer support moving abdication groove;

7. the toothed plate 71, the toothed plate locking block 72, the teeth 73, the lug grooves 74 and the toothed plate blocking feet;

8. a return spring 81, a return spring inner support leg 82, a return spring outer support leg;

9. clearance elimination piece, 91, spacing post, 92, return spring hole of stepping down.

Detailed Description

The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments by the applicant is not intended to limit the technical solutions, and any changes made according to the present invention rather than the essential changes should be considered as the protection scope of the present invention.

In the following description, any concept relating to the directions or orientations of up, down, left, right, front, and rear is based on the position shown in the corresponding drawings, and thus should not be construed as particularly limiting the technical solution provided by the present invention.

Referring to fig. 1 to 4, the present invention relates to a manual recliner for a car seat, which comprises a gear plate 1, a gear plate base 2 fixed on one side of the gear plate 1 in a matching manner, a closed sleeve 3 surrounding and enclosing the periphery of the outer edges of the gear plate 1 and the gear plate base 2, a driving block 5 arranged between the gear plate 1 and the gear plate base 2, a cam plate 6, a return spring 8, at least two toothed plates 7, and a driving member 4 for driving the driving block 5 to rotate. The central position of the driving block 5 is provided with a spline hole 51, the central position of the cam plate 6 is provided with a cam plate central hole 61, the central position of the fluted disc 1 is provided with a transmission shaft abdicating hole 11, and the central position of the fluted disc seat 2 is provided with a fluted disc seat central hole 21. The driving member 4 includes a driving member body 41 and a driving member positioning collar 42, the driving member body 41 includes a connecting portion 411 connected with the unlocking handle in a matching manner, a driving member flange 412 pressed on the gear seat 2, a driving spline portion 413 matched with the spline hole 51 to realize transmission, and a transmission shaft 414 matched with the transmission shaft yielding hole 11 in sequence. The driving member body 41 sequentially penetrates through the fluted disc seat central hole 21, the spline hole 51, the cam plate central hole 61 and the transmission shaft abdicating hole 11, and then screws the driving member positioning collar 42 at the end part of the transmission shaft 414 extending out of the transmission shaft abdicating hole 11, so as to realize the locking and installation of the fluted disc 1, the fluted disc seat 2 and parts between the fluted disc 1 and the fluted disc seat 2. The driving piece 4 drives the driving block 5 to rotate through the matching transmission of the spline part 413 and the spline hole 51.

As shown in fig. 1, the driving block 5 and the cam plate 6 are integrally fitted with each other, a driving block flange 52 is convexly provided on one surface of the driving block 5 facing the cam plate 6, a driving block flange caulking groove 63 into which the driving block flange 52 is inserted is provided at a position of the cam plate 6 corresponding to the driving block flange 52, the driving block flange 52 is inserted into the driving block flange caulking groove 63 to achieve the mutual fitting of the driving block 5 and the cam plate 6, and as mentioned above, the rotation of the driving block 5 can drive the cam plate 6 to rotate.

As shown in fig. 1 to 4, two centrally symmetrically arranged return springs 8 are wound on one surface of the cam plate 6 facing the toothed disc 1, and two return spring inner leg yielding holes 65 and two return spring outer leg moving yielding grooves 66 are symmetrically formed on the cam plate 6. And a return spring inner supporting leg caulking groove 53 is formed in the position, corresponding to the return spring inner supporting leg abdicating hole 65, of the driving block 5. The return spring inner supporting leg 81 of the return spring 8 passes through the return spring inner supporting leg abdicating hole 65 of the cam plate 6 and then is clamped in the return spring inner supporting leg caulking groove 53 of the driving block 5, and the return spring outer supporting leg 82 of the return spring 8 passes through the return spring outer supporting leg moving abdicating groove 66 of the cam plate 6 and then is clamped in the toothed plate 7. The two return springs 8 are used for driving the driving block 5 and the cam plate 6 to reset, further driving the toothed plate 7 to be meshed and locked with the toothed disc seat 2, the return force is balanced, and the rotation is stable.

As shown in fig. 1 and 2, the toothed plate 1 is formed with a ring of toothed rings 12 on its inner circumference, and the toothed plate 7 is formed with a row of teeth 72 on its outer edge facing the inner side of the toothed plate 1 for engagement with the toothed rings 12. When the teeth 72 are engaged with the ring gear 12, the toothed disc 1 is locked against rotation; when teeth 72 and ring gear 12 are disengaged, toothed disc 1 is unlocked and rotatable.

As shown in fig. 1 to 4, the tooth disc base 2 is used for mounting the tooth plates 7, in this embodiment, the number of the tooth plates 7 is preferably four, and two tooth plates are paired, each pair of tooth plates 7 is radially symmetrical around the center of the tooth disc base 2, in order to be correspondingly slidably fitted to the tooth plates 7, tooth disc base bosses 23 are convexly provided at intervals in the radial direction around a tooth disc base central hole 21 on one side surface facing the tooth disc 1 of the tooth disc base 7, the tooth disc base bosses 23 are correspondingly provided with four, and a tooth plate groove 22 for mounting the tooth plate 7 and for radially sliding is formed between two adjacent tooth disc base bosses 23.

As shown in fig. 1 to 4, the tooth plate 7 is provided with a tooth plate locking block 71 on one side surface facing the cam plate 6, the cam plate 6 is provided with a locking block moving abdicating groove 62 for the tooth plate locking block 71 to be embedded in, the inner wall of the groove of the locking block moving abdicating groove 62 near the outer side is divided into a locking edge 621 and a separating edge 622, and the distance from the locking edge 621 to the center of the cam plate 6 is greater than the distance from the separating edge 622 to the center of the cam plate 6. The locking stop lugs 54 with the same number as that of the tooth plates 7 are uniformly distributed on the outer edge of the driving block 5, and a stop lug groove 73 and a tooth plate stop foot 74 are formed on one side of the tooth plate 7 far away from the tooth teeth 72. The lug grooves 73 and the tooth plate lugs 74 are in smooth curve transition, and the locking lugs 54 can rotate into the lug grooves 73 under the action of the driving piece 4 and also rotate onto the tooth plate lugs 74 under the action of the return spring 8. When the toothed disc 1 is locked with the toothed plate 7, as shown in fig. 3, the locking stop lugs 54 and the toothed plate locking blocks 71 respectively cooperate with the toothed plate stop feet 74 and the locking edges 621 and push the toothed plate 7 to slide outwards to lock the toothed disc 1; when toothed disc 1 and toothed plate 7 are unlocked, as shown in fig. 4, locking lugs 54 and toothed plate locking blocks 71 respectively engage with lug grooves 73 and separating edges 622 and pull toothed plate 7 to slide inward to unlock toothed disc 1.

Further, as shown in fig. 1 and 2, in this embodiment, in the two pairs of tooth plates 7, the anti-backlash blocks 9 are disposed between one pair of tooth plates 7 and the tooth plate base boss 23, and specifically, the number of the anti-backlash blocks 9 is two and is located on a single side of the tooth plate 7 symmetrically around the center of the tooth plate base 2. The anti-backlash block 9 is wedge-shaped, when the angle adjuster is used for a long time, a gap is generated between the toothed plate 7 and the toothed disc base boss 23, the wedge-shaped anti-backlash block 9 is wedged into the center side under the action of the return spring 8, the gap between the toothed plate 7 and the toothed disc base boss 23 is eliminated, and the gap and the noise prevention of the angle adjuster in a locking state are guaranteed.

From the foregoing, the return spring outer leg 82 of the return spring 8 passes through the return spring outer leg movement abdicating groove 66 of the cam plate 6 and then is clamped in the toothed disc 7, and here, because the anti-backlash block 9 has the function of adjusting the clearance under the action of the return spring 8, the return spring outer leg 82 of the return spring 8 passes through the return spring outer leg movement abdicating groove 66 of the cam plate 6 and then is clamped on the anti-backlash block 9 or between the anti-backlash block 9 and the toothed disc base boss 23, so that the function of adjusting the clearance can be achieved. The latter is preferred in this embodiment, specifically, a return spring yielding hole 92 is formed in the surface of the gap eliminating block 9, which is matched with the fluted disc base boss 23, a fluted disc base boss yielding hole 231 is formed in the surface of the fluted disc base boss 23, which is matched with the gap eliminating block 9, and the return spring yielding hole 92 and the fluted disc base boss yielding hole 231 are combined into a hole for the clamping of the return spring outer leg 82. The hole length of the tooth disc seat boss yielding hole 231 is larger than that of the return spring yielding hole 92, so that the return spring outer supporting leg 82 inserted between the tooth disc seat boss and the return spring yielding hole can move along with the movement of the clearance elimination block 9.

Further, the tooth plate locking block 71 on the tooth plate 7 matched with the anti-backlash block 9 is square, and the tooth plate locking block 71 on the tooth plate 7 not matched with the anti-backlash block 9 is circular, wherein the tooth plate 7 is matched with the toothed disc 1, and the function of angle modulation idle stroke can be realized through the square tooth plate locking block 71.

As shown in fig. 1, 3 and 4, the anti-backlash block 9 is provided with a limiting column 91 protruding from one side of the cam plate 6, the cam plate 6 is provided with an abdicating groove 64, the end of the abdicating groove 64 is provided with a limiting foot 641, the curve of the abdicating groove 64 can drive the limiting column 91 to move from tight to loose with the limiting block 7, so that the toothed plate 7 and the toothed plate 1 are disengaged, and the driving block 5 and the cam plate 6 are further rotated by the cooperation of the limiting foot 641 and the limiting column 91.

Referring to fig. 3 and 4 in combination with fig. 1 and 2, when the angle adjusting device is installed, the toothed disc 1 is connected to the backrest side plate, the toothed disc seat 2 is connected to the seat bottom basin side plate, the driving member 4 is in transmission connection with the handle through the connecting portion 411 thereon, when the angle of the backrest needs to be adjusted, as shown in fig. 3, the handle is pulled to drive the driving member 4 to rotate counterclockwise, and the driving block 5 and the cam plate 6 rotate together, at this time, the locking block moves the abdicating groove 62 to rotate counterclockwise, and the toothed plate locking block 71 moves from the locking edge 621 to the detaching edge 622, because the detaching edge 622 is closer to the central point of the inner side of the toothed disc 1 than the locking edge 621, the cam plate 6 pulls the toothed plate 7 to move inward to separate from the toothed disc 1, the toothed disc 1 is unlocked, the angle of the backrest can be adjusted, and the backrest can rotate to. At this time, the locking lugs 54 are also slid into the lug grooves 73 by the toothed plate lugs 74. After the handle is released, as shown in fig. 4, the driving block 5 and the cam plate 6 are rotationally reset under the action of the return spring 8, the locking stop lug 54 slides from the stop lug groove 73 to the tooth plate stop lug 74, and since the tooth plate stop lug 74 is closer to the inner center point of the toothed plate 1 than the stop lug groove 73, the locking stop lug 54 pushes the toothed plate 7 to move outwards until the teeth 72 on the toothed plate 7 are engaged with the gear ring 12 on the toothed plate 1, and at this time, the toothed plate 1 and the seat back connected with the toothed plate are locked and cannot rotate.

Claims

1. A manual angle adjuster for an automobile seat comprises a fluted disc (1), a fluted disc seat (2) which is fixed on one side of the fluted disc (1) in a matching way, a closed sleeve (3) which surrounds and is enveloped at the peripheries of the outer edges of the fluted disc (1) and the fluted disc seat (2), a driving block (5) which is arranged between the fluted disc (1) and the fluted disc seat (2), a cam plate (6), a return spring (8) and at least two toothed plates (7), and a driving piece (4) which drives the driving block (5) to rotate, wherein the driving block (5) and the cam plate (6) are mutually embedded and matched into a whole, a fluted disc seat boss (23) is arranged on one side surface of the fluted disc seat (2) facing the fluted disc (1) in a protruding way, the toothed plates (7) are matched between the adjacent fluted disc seat bosses (23) in a sliding way, a toothed plate locking block (71) on one side surface of the toothed plates (7) facing the cam plate (6) is matched in a locking block moving yielding groove (62) on the cam plate (6) in a, tooth (72) that sets up on the outward flange of orientation fluted disc (1) medial surface of pinion rack (7) and ring gear (12) on fluted disc (1) mesh mutually and join in marriage its characterized in that: be equipped with between pinion rack (7) and fluted disc seat boss (23) and eliminate clearance piece (9), the shape of eliminating clearance piece (9) is the wedge, return spring (8) pass cam plate (6) back, stabilizer blade (81) are fixed on drive block (5) in the return spring of return spring (8), return spring outer stabilizer blade (82) of return spring (8) are fixed on eliminating clearance piece (9) or between eliminating clearance piece (9) and fluted disc seat boss (23).

2. The manual angle adjuster for the automobile seat is characterized in that a spline hole (51) is formed in the center of the driving block (5), a cam plate center hole (61) is formed in the center of the cam plate (6), a transmission shaft abdicating hole (11) is formed in the center of the toothed disc (1), and a toothed disc seat center hole (21) is formed in the center of the toothed disc seat (2); the driving part (4) comprises a driving part body (41) and a driving part positioning sleeve ring (42), wherein the driving part body (41) comprises a driving part flange plate (412) pressed on the gear disc seat (2), a spline part (413) matched with the spline hole (51) to realize transmission, and a transmission shaft (414) matched with the transmission shaft abdicating hole (11); the driving piece body (41) penetrates through the fluted disc seat center hole (21), the spline hole (51), the cam plate center hole (61) and the transmission shaft abdicating hole (11) in sequence, and then the end part of the transmission shaft (414) extending out of the transmission shaft abdicating hole (11) is screwed with the driving piece positioning sleeve ring (42), so that locking installation of the fluted disc (1), the fluted disc seat (2) and parts between the fluted disc seat and the fluted disc seat is realized.

3. The manual angle adjuster for the automobile seat is characterized in that a driving block flange (52) is convexly arranged on one surface, facing the cam plate (6), of the driving block (5), and a driving block flange embedding groove (63) for embedding the driving block flange (52) is formed in the position, corresponding to the driving block flange (52), of the cam plate (6).

4. The manual angle adjuster for the automobile seat is characterized in that the number of the return springs (8) is two, the return springs are symmetrically coiled around the center of the cam plate (6) on the side surface of the cam plate (6) facing the fluted disc (1), and the cam plate (6) is symmetrically provided with two return spring inner leg abdicating holes (65) and two return spring outer leg moving abdicating grooves (66); a return spring inner supporting leg caulking groove (53) is formed in the position, corresponding to the return spring inner supporting leg abdicating hole (65), of the driving block (5); and the inner support leg (81) of the return spring (8) passes through the inner support leg abdicating hole (65) of the return spring of the cam plate (6) and then is clamped in the inner support leg embedding groove (53) of the return spring of the driving block (5), and the outer support leg (82) of the return spring (8) passes through the outer support leg moving abdicating groove (66) of the return spring of the cam plate (6) and then is clamped on the anti-backlash block (9) or between the anti-backlash block (9) and the fluted disc seat boss (23).

5. The manual angle adjuster for the automobile seat is characterized in that a return spring yielding hole (92) is formed in the surface, matched with the fluted disc seat boss (23), of the anti-backlash block (9), a fluted disc seat boss yielding hole (231) is formed in the surface, matched with the anti-backlash block (9), of the fluted disc seat boss (23), the return spring yielding hole (92) and the fluted disc seat boss yielding hole (231) are combined into a hole for clamping the return spring outer support leg (82), and the hole length of the fluted disc seat boss yielding hole (231) is larger than that of the return spring yielding hole (92).

6. The manual recliner for vehicle seats according to claim 1, characterized in that said anti-backlash blocks (9) are two in number and are located on a single side of the toothed plate (7) symmetrically around the center of the toothed disc seat (2).

7. The manual angle adjuster for the automobile seat is characterized in that a tooth plate locking block (71) is convexly arranged on one side surface of the tooth plate (7) facing the cam plate (6), a locking block moving abdicating groove (62) for the tooth plate locking block (71) to be embedded in is arranged on the cam plate (6), the inner wall of the groove, close to the outer side, of the locking block moving abdicating groove (62) is divided into a locking edge (621) and a separating edge (622), and the distance from the locking edge (621) to the center of the cam plate (6) is greater than the distance from the separating edge (622) to the center of the cam plate (6); the locking stop lugs (54) with the same number as the tooth plates (7) are uniformly distributed on the outer edge of the driving block (5), a stop lug groove (73) and a tooth plate stop pin (74) are formed on one side, away from the teeth (72), of the tooth plates (7), and when the fluted disc (1) is locked with the tooth plates (7), the locking stop lugs (54) and the tooth plate locking block (71) are respectively matched with the tooth plate stop pins (74) and the locking edges (621) and push the tooth plates (7) to slide outwards to lock the fluted disc (1); when the fluted disc (1) and the toothed plate (7) are unlocked, the locking stop lug (54) and the toothed plate locking block (71) are respectively matched with the stop lug groove (73) and the separating edge (622) and pull the toothed plate (7) to slide inwards so as to unlock the toothed plate (1).

8. The manual recliner for automobile seats according to claim 7 is characterized in that the number of the toothed plates (7) is four, and the toothed plates are paired in pairs, and each pair of toothed plates (7) is centrosymmetric around the center of the toothed disc seat (2).

9. The manual recliner for automobile seats of claim 8, wherein said tooth plate locking blocks (71) on the tooth plate (7) engaged with the anti-backlash block (9) are square, and said tooth plate locking blocks (71) on the tooth plate (7) not engaged with the anti-backlash block (9) are circular.

10. The manual angle adjuster for the automobile seat is characterized in that a limiting column (91) is convexly arranged on one side surface of the anti-backlash block (9) facing the cam plate (6), a yielding groove (64) is arranged on the cam plate (6), a limiting foot (641) is arranged at the end part of the yielding groove (64), and when the toothed plate (7) is separated from the toothed plate (1), the limiting foot (641) is matched with the limiting column (91).