JP5254160B2 - Reclining device - Google Patents

Description

  The present invention relates to a reclining device for a vehicle seat, and more particularly to a constituent member thereof.

  Conventionally, as a reclining device, there exists a thing as described in patent document 1, for example. The reclining device described in Patent Document 1 will be described using the reference numerals of Patent Document 1. The reclining device 200 includes a “base plate 10”, “gear plate 20”, “fixed guide 30”, and “lock gear 40”. And “cam 50”, “spring 60”, “center shaft 70”, and “link plate 80”. Hereinafter, each component will be described.

First, the “base plate 10” constitutes the base of the reclining device 200, and is fixed to either the seat cushion or the seat back in the vehicle seat. The base plate 10 needs to be strong enough to support the load of the seat back and the weight of the occupant. Therefore, it can be considered that the steel sheet is constituted by pressing or cutting. In this embodiment, the base plate 10 is configured to have a circular outer shape by pressing a steel plate and to form a fixed guide 30 to be described later, which is fixed to the seat cushion side.

Next, the “gear plate 20” is assembled to the base plate 10 so as to be rotatable, and is fixed to either the seat cushion or the seat back of the vehicle seat (the base plate 10 is not fixed). is there. This gear plate 20 forms “inner teeth 21” on the inner periphery opposite to the surface to which the seat back (or seat cushion) is fixed. The internal teeth 21 can mesh with external teeth 41 of a lock gear 40 described later, and lock the tilt of the seat back in the front-rear direction by meshing with the lock gear 40. The gear plate 20 needs to be strong enough to support the load on the seat back and the weight of the occupant. Therefore, it can be considered that the steel sheet is constituted by pressing or cutting. In the present embodiment, the gear plate 20 is formed by pressing a steel plate to form a circular outer shape and to form an inner tooth 21 that is fixed to the seat back side.

Further, the “fixed guides 30” are integrally provided in pairs at two eccentric positions in the base plate 10 and each hold a lock gear 40 described later. Since the seat back load and the weight of the occupant are concentrated on the fixed guide 30, it is necessary to have such strength that the load can be supported. Therefore, it can be considered that the steel sheet is constituted by pressing or cutting. In the present embodiment, when the base plate 10 is formed by pressing a steel plate, the fixed guide 30 is configured to protrude by being pushed out from the back side with a mold.

However, in the present invention, the fixed guide 30 needs to have a mechanical strength lower than that of the gear plate 20 and a lock gear 40 described later. When a large load is input to the reclining device 200 (in an emergency), the fixed guide 30 is pressed and deformed by the lock gear 40, and the outer end 31 thereof is against the inner teeth 21 of the gear plate 20. This is for enabling contact.

It is also conceivable that the fixed guide 30 is provided with its outer end 31 and the tip of the inner tooth 21 of the gear plate 20 as close as possible. By configuring in this way, when the fixed guide 30 is deformed, the outer end 31 bites the inner teeth 21 of the gear plate 20 more reliably.

Further, it is conceivable that the fixed guide 30 is formed with a thickness that is substantially in close contact with the gear plate 20 when the base plate 10 and the gear plate 20 are assembled. With such a configuration, when the fixed guide 30 is deformed, the deformation in the thickness direction is suppressed by the gear plate 20, and most of the deformation amount of the fixed guide 30 is applied to the inner teeth 21 of the gear plate 20. Can be used for biting.

The “lock gear 40” is formed so that both side surfaces thereof are parallel to be slidable between the fixed guides 30 and “external teeth 41” are formed on one side connecting the both side surfaces to form the gear plate. It is possible to engage with the 20 internal teeth 21. Since the lock gear 40 primarily bears the load from the gear plate 20 when the outer teeth 41 mesh with the inner teeth 21 of the gear plate 20, the lock gear 40 is strong enough to withstand such loads. It is necessary to configure with. Therefore, the lock gear 40 can be configured by quenching or forging after forming the base material by pressing or cutting the steel sheet. In this embodiment, the lock gear 40 is configured by quenching after pressing a steel plate, and further, a protrusion 42 is provided to enable joining to a link plate 80 described later. It has been.

The “cam 50” is disposed substantially at the center of the base plate 10 and is inserted through a shaft 70 described later, and controls the movement (sliding) of the lock gear 40 by rotating simultaneously with the shaft 70. . That is, the rotation of the cam 50 causes the lock gear 40 to engage with the gear plate 20 and release it, and consequently locks and releases the tilt in the front-rear direction of the seat back on which the reclining device 200 is mounted. It is. In this embodiment, the cam 50 is provided with a square hole 52 through which a prism 71 of the center shaft 70 described later can be inserted, and two protrusions so as to be able to be joined to a link plate 80 described later. A part 51 is provided.

The “spring 60” is configured to rotate and bias the cam 50 and maintain the lock gear 40 in mesh with the internal teeth 21 of the gear plate 20. In this embodiment, a spiral spring 60 is employed as the spring 60, one end of which is engaged with the cam 50, and the other end is engaged with an engaging protrusion protruding from the base plate 10. The present invention is not limited to such a configuration, and may be rotationally biased by attaching a spring 60 (not shown) to the center shaft 70 described below.

The “link plate 80” rotates simultaneously with the cam 50 when the cam 50 rotates to release the engagement of the lock gear 40 with the internal teeth 21 of the gear plate 20. It is something to pull in. In the present embodiment, the link plate 80 is formed with a square hole 81 through which the shaft prismatic portion 71 can be inserted at a circular center position constituted by thin ridges, and the protrusion 51 of the cam 50 can be inserted. A round hole 82 is formed, and a long hole 83 through which the protrusion 42 of the lock gear 40 can be inserted is formed.

The “center shaft 70” is inserted through through holes formed in the center portions of the base plate 10 and the gear plate 20, and coaxially supports the base plate 10 and the gear plate 20. Further, the center shaft 70 is provided with an “operation lever 72” according to another member. When the occupant manually operates the operation lever 72, the center shaft 70 is inserted between the base plate 10 and the gear plate 20. The cam 50 and the link plate 80 thus rotated simultaneously rotate so that the lock gear 40 is engaged with and released from the gear plate 20. In this embodiment, the center shaft 70 is formed by cutting a steel material. More specifically, a prism portion 71 that can be inserted into a square hole 81 formed in the cam 50 and the link plate 80 is provided in the vicinity of a substantially middle portion of the center shaft 70. An operation lever 72 can be attached to one end of the center shaft 70, and a serration 73 that can be connected to a connection shaft (not shown) is formed at the other end. This is because the reclining device 200 is attached to the left and right connecting portions of the vehicle seat. The rotation of the cam 50 in the reclining device 200 on the left side of the seat and the rotation of the cam 50 in the reclining device 200 on the right side of the seat This is because it is necessary to synchronize them via the connecting shaft.

  Further, as shown in FIG. 15, the center shaft 70 is inserted through the center of the reclining device, and is prevented from being removed by a washer.

Japanese Patent No. 4305571

  However, in the configuration as described above, a washer is used to prevent the center shaft from coming off. This method requires a separate assembly process, increases the number of parts, and lowers the conveyance efficiency. There was a possibility of becoming.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a vehicle seat reclining device with improved assembling property, cost reduction, and weight reduction. It is in.

In order to solve the above-described problem, in the reclining device according to claim 1, “a seat cushion on which an occupant is seated;
A seat back tiltable with respect to the seat cushion;
A reclining device attached to a seat back bracket attached to the seat back, and a seat cushion bracket attached to the seat cushion, and capable of fixing the seat back with an angle to the seat cushion,
The reclining device can be operated, and an annular convex portion is provided on a shaft inserted into the reclining device,
The annular protrusion is arranged to be sandwiched between the reclining device and one of the seat back bracket and the seat cushion bracket.

  According to the reclining device of claim 1, an annular convex portion is provided on the shaft for operating the reclining device, and the annular convex portion is between the reclining device and either the seat back bracket or the seat cushion bracket. By being arranged so as to be sandwiched, the shaft can be prevented from coming off without using other members, which leads to a reduction in the number of parts and a reduction in cost.

It is the reclining apparatus concerning this invention, Comprising: (a) is the state by which the reclining of the reclining apparatus was locked, Comprising: It is DD sectional drawing in (b), (b) is CC in (a). It is sectional drawing.

  Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a reclining device according to the present invention, in which (a) is a state where the reclining of the reclining device is locked, and is a sectional view taken along the line DD in (b), and (b) is (a). It is CC sectional drawing in FIG. The reclining device 200 according to the present embodiment includes a “base plate 10”, “gear plate 20”, “fixed guide 30”, “lock gear 40”, “cam 50”, “spring 60”, “center shaft 70”, “ Link plate 80 ". Hereinafter, each component will be described.

First, the “base plate 10” constitutes the base of the reclining device 200, and is fixed to either the seat cushion or the seat back in the vehicle seat. The base plate 10 needs to be strong enough to support the load of the seat back and the weight of the occupant. Therefore, it can be considered that the steel sheet is constituted by pressing or cutting. In this embodiment, the base plate 10 is configured to have a circular outer shape by pressing a steel plate and to form a fixed guide 30 to be described later, which is fixed to the seat cushion side.

Next, the “gear plate 20” is assembled to the base plate 10 so as to be rotatable, and is fixed to either the seat cushion or the seat back of the vehicle seat (the base plate 10 is not fixed). is there. This gear plate 20 forms “inner teeth 21” on the inner periphery opposite to the surface to which the seat back (or seat cushion) is fixed. The internal teeth 21 can mesh with external teeth 41 of a lock gear 40 described later, and lock the tilt of the seat back in the front-rear direction by meshing with the lock gear 40. The gear plate 20 needs to be strong enough to support the load on the seat back and the weight of the occupant. Therefore, it can be considered that the steel sheet is constituted by pressing or cutting. In the present embodiment, the gear plate 20 is formed by pressing a steel plate to form a circular outer shape and to form an inner tooth 21 that is fixed to the seat back side.

Further, the “fixed guides 30” are integrally provided in pairs at two eccentric positions in the base plate 10 and each hold a lock gear 40 described later. Since the seat back load and the weight of the occupant are concentrated on the fixed guide 30, it is necessary to have such strength that the load can be supported. Therefore, it can be considered that the steel sheet is constituted by pressing or cutting. In the present embodiment, when the base plate 10 is formed by pressing a steel plate, the fixed guide 30 is configured to protrude by being pushed out from the back side with a mold.

However, in the present invention, the fixed guide 30 needs to have a mechanical strength lower than that of the gear plate 20 and a lock gear 40 described later. When a large load is input to the reclining device 200 (in an emergency), the fixed guide 30 is pressed and deformed by the lock gear 40, and the outer end 31 thereof is against the inner teeth 21 of the gear plate 20. This is for enabling contact.

It is also conceivable that the fixed guide 30 is provided with its outer end 31 and the tip of the inner tooth 21 of the gear plate 20 as close as possible. By configuring in this way, when the fixed guide 30 is deformed, the outer end 31 bites the inner teeth 21 of the gear plate 20 more reliably.

Further, it is conceivable that the fixed guide 30 is formed with a thickness that is substantially in close contact with the gear plate 20 when the base plate 10 and the gear plate 20 are assembled. With such a configuration, when the fixed guide 30 is deformed, the deformation in the thickness direction is suppressed by the gear plate 20, and most of the deformation amount of the fixed guide 30 is applied to the inner teeth 21 of the gear plate 20. Can be used for biting.

The “lock gear 40” is formed so that both side surfaces thereof are parallel to be slidable between the fixed guides 30 and “external teeth 41” are formed on one side connecting the both side surfaces to form the gear plate. It is possible to engage with the 20 internal teeth 21. Since the lock gear 40 primarily bears the load from the gear plate 20 when the outer teeth 41 mesh with the inner teeth 21 of the gear plate 20, the lock gear 40 is strong enough to withstand such loads. It is necessary to configure with. Therefore, the lock gear 40 can be configured by quenching or forging after forming the base material by pressing or cutting the steel sheet. In this embodiment, the lock gear 40 is configured by quenching after pressing a steel plate, and further, a protrusion 42 is provided to enable joining to a link plate 80 described later. It has been.

The “cam 50” is disposed substantially at the center of the base plate 10 and is inserted through a shaft 70 described later, and controls the movement (sliding) of the lock gear 40 by rotating simultaneously with the shaft 70. . That is, the rotation of the cam 50 causes the lock gear 40 to engage with the gear plate 20 and release it, and consequently locks and releases the tilt in the front-rear direction of the seat back on which the reclining device 200 is mounted. It is. In this embodiment, the cam 50 is provided with a square hole 52 through which a prism 71 of the center shaft 70 described later can be inserted, and two protrusions so as to be able to be joined to a link plate 80 described later. A part 51 is provided.

The “spring 60” is configured to rotate and bias the cam 50 and maintain the lock gear 40 in mesh with the internal teeth 21 of the gear plate 20. In this embodiment, a spiral spring 60 is employed as the spring 60, one end of which is engaged with the cam 50, and the other end is engaged with an engaging protrusion protruding from the base plate 10. The present invention is not limited to such a configuration, and may be rotationally biased by attaching a spring 60 (not shown) to the center shaft 70 described below.

The “center shaft 70” is inserted through through holes formed in the center portions of the base plate 10 and the gear plate 20, and coaxially supports the base plate 10 and the gear plate 20. Further, the center shaft 70 is provided with an “operation lever 72” according to another member. When the occupant manually operates the operation lever 72, the center shaft 70 is inserted between the base plate 10 and the gear plate 20. The cam 50 and the link plate 80 thus rotated simultaneously rotate so that the lock gear 40 is engaged with and released from the gear plate 20. In this embodiment, the center shaft 70 is formed by cutting a steel material. More specifically, a prism portion 71 that can be inserted into a square hole 81 formed in the cam 50 and the link plate 80 is provided in the vicinity of a substantially middle portion of the center shaft 70. An operation lever 72 can be attached to one end of the center shaft 70, and a serration 73 that can be connected to a connection shaft (not shown) is formed at the other end. This is because the reclining device 200 is attached to the left and right connecting portions of the vehicle seat. The rotation of the cam 50 in the reclining device 200 on the left side of the seat and the rotation of the cam 50 in the reclining device 200 on the right side of the seat This is because it is necessary to synchronize them via the connecting shaft.

  Further, the center shaft 70 is provided with an annular convex portion 74, and the annular convex portion 74 is sandwiched between the base plate 10 of the reclining device 200 and the bracket 90 on the seat side, thereby preventing the central shaft 70 from coming off. By doing in this way, it becomes possible to attach the center shaft 70, without specifying a washer.

The “link plate 80” rotates simultaneously with the cam 50 when the cam 50 rotates to release the engagement of the lock gear 40 with the internal teeth 21 of the gear plate 20. It is something to pull in. In the present embodiment, the link plate 80 is formed with a square hole 81 through which the shaft prismatic portion 71 can be inserted at a circular center position constituted by thin ridges, and the protrusion 51 of the cam 50 can be inserted. A round hole 82 is formed, and a long hole 83 through which the protrusion 42 of the lock gear 40 can be inserted is formed.

  Next, the operation of the reclining device 200 according to the present embodiment having the above configuration will be described.

First, when locking the tilting of the seat back in the front-rear direction in the reclining device 200 according to this embodiment, the occupant opens the operation lever 72. When the operation lever 72 is released, the cam 50 urged clockwise in the drawing by the spring 60 rotates, and the lock gear 40 slides so as to be pushed outward along the fixed guide 30 in the base plate 10. The outer teeth 41 of the lock gear 40 mesh with the inner teeth 21 on the inner periphery of the gear plate 20, and the tilting of the seat back in the front-rear direction is locked.

On the other hand, in the reclining device 200 according to the present embodiment, when unlocking the tilting of the seat back in the front-rear direction, the occupant pulls up (or pushes down) the operation lever 72. When the operation lever 72 is rotated, the center shaft 70 to which the operation lever 72 is mounted rotates counterclockwise, and the cam 50 and the link plate 80 through which the center shaft 70 is inserted rotate simultaneously. Become. A space may be generated between the cam 50 and the lock gear 40 by the rotation of the cam 50. However, the outer edge of the slot 83 associated with the link plate 80 abuts against the protrusion 42 of the lock gear 40, and the lock gear 40 is smoothly drawn inward, thereby filling the space. When the lock gear 40 is pulled inward, the seat back can be tilted in the front-rear direction. These series of operations are performed almost simultaneously.

10 Base plate 11 Convex portion 20 Gear plate 21 Internal tooth 30 Fixed guide 31 Outer end portion 32 Guide block 40 Lock gear 41 External tooth 42 Protruding portion 50 Cam 51 Protruding portion 52 Square hole 60 Spring 70 Center shaft 71 Square column portion 72 Operation lever 73 Serration 80 Link plate 81 Square hole 82 Round hole 83 Long hole 200 Reclining device

Claims (1)

A seat cushion on which an occupant sits,
A seat back tiltable with respect to the seat cushion;
A reclining device attached to a seat back bracket attached to the seat back, and a seat cushion bracket attached to the seat cushion, and capable of fixing the seat back with an angle to the seat cushion,
The reclining device can be operated, and an annular convex portion is provided on a shaft inserted into the reclining device,
The reclining device, wherein the annular convex portion is arranged so as to be sandwiched between the reclining device and either the seat back bracket or the seat cushion bracket.

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