JP2011147747A - Reclining device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reclining device surely meshing a locking gear with an internal tooth of a gear plate. <P>SOLUTION: A plate 60 rotating simultaneously with a center shaft 70 is provided, and the plate is fitted, with a clearance gap, to a fitting hole formed in a cam 50, whereby the cam is enabled to slide in a specified direction relative to the plate. The center shaft is fitted, with a clearance gap, to a fitting hole formed in the plate, whereby the plate is enabled to slide in a specified direction to the center shaft. Thus, when an error is caused in meshing of the locking gear 40 and the internal tooth of the inner periphery of the gear plate, the cam and the plate slide to absorb the error. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a reclining device for an automobile seat that adjusts an inclination angle of a seat back.

  Conventionally, as a reclining device, there exists a thing as described in patent document 1, for example. In the reclining device described in Patent Document 1, a lower arm 1 fixed to a seat cushion frame and an upper arm 2 fixed to a seat back frame are rotatably supported, and a rotating shaft is provided in a through hole of the lower arm 1 and the upper arm 2. 3 is inserted, and a lock mechanism 4 is disposed between the lower arm 1 and the upper arm 2. The lock mechanism 4 includes three poles 5 and an internal tooth portion 22a that meshes with and releases the pole 5. The pole 5 is slidably disposed in a guide groove 12 formed in the lower arm 1, and rotates. By coming into contact with the cam 6 that is supported so as to rotate integrally with the shaft 3, the cam 6 is pressed in the direction of meshing with the internal tooth portion 22 a. Further, a pin 51 is erected on the pole 5, and the pin 51 is formed on an elongated hole 12 a formed in the guide groove 12 of the lower arm 1 and an operation handle 7 fixed so as to rotate integrally with the rotary shaft 3. By being inserted through the cam slot 71, the pole 5 is slid along the cam slot 71 and the guide groove 12, and the meshing with the internal teeth 22a is released. When the occupant operates the operation handle 7, the pawl 5 and the internal tooth portion 22a are engaged and released.

Japanese Patent No. 3948086

The reclining device described above is configured to mesh and release the three poles 5 with the inner teeth 22a. In order to reliably mesh the three poles 5 with the inner teeth 22a, the pole 5 and the pole 5 High component accuracy is required for the cam 6 that presses.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a reclining device capable of reliably engaging a lock gear (pole) and internal teeth. .

In order to solve the above-described problems, a circular base plate fixed to one of the seat cushion and the seat back, and a rotary base assembly assembled to the base plate, and fixed to the other one of the seat cushion and the seat back A circular gear plate with teeth, fixed guides provided at three locations on the base plate, and arranged between the fixed guides, can slide along the fixed guides and engage with internal teeth on the gear plate. A lock gear having various outer teeth, a cam for controlling the movement of the lock gear to mesh the lock gear with the inner teeth of the gear plate, a plate engaged with an engagement protrusion standing on the cam, and the plate being driven to rotate A reclining device having a center shaft to be formed, wherein a cam engagement protrusion is formed on the plate. Slidably engaged in a specific direction as the first slot, the center shaft is technically characterized in that so as to be slidably engaged in a specific direction and a second elongate hole formed in the plate.

According to the reclining device according to claim 1, the engagement protrusion of the cam is engaged with the first elongated hole formed in the plate so as to be slidable in a specific direction, and the second elongated hole formed in the plate with the center shaft is formed. By engaging with a specific direction so as to be slidable, if an error occurs in the engagement between the lock gear and the inner teeth of the inner periphery of the gear plate, the cam and plate slide to absorb the error. Can do.

(A) It is the reclining apparatus which concerns on this invention, Comprising: It is BB sectional drawing in FIG. (B) is AA sectional drawing in FIG. (A) It is the reclining apparatus which concerns on this invention, Comprising: It is DD sectional drawing in FIG. (B) is CC sectional drawing in FIG. It is explanatory drawing which shows the cam. It is explanatory drawing which shows the plate 60. FIG. It is explanatory drawing which shows the link plate 90. FIG.

  Embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the reclining device 100 according to the present embodiment includes a base plate 10, a gear plate 20, a fixed guide 30, a lock gear 40, a cam 50, a plate 60, a center shaft 70, A torsion spring 80 and a link plate 90 are provided. Hereinafter, each configuration will be described.

  The base plate 10 constitutes a base of the reclining device 100 and is fixed to a seat cushion or a seat back in a vehicle seat. The base plate is formed into a circular outer shape by pressing a steel plate, and a fixed guide 30 described later. Further, a through hole through which a center shaft 70 described later is inserted is formed in the center portion of the base plate 10 and is rotatably assembled with a gear plate 20 described later.

  The gear plate 20 is rotatably assembled to the base plate 10 and is fixed to a seat back or a seat cushion in the vehicle seat. The gear plate 20 has internal teeth 21 on the inner periphery opposite to the surface to which the seat back or the seat cushion is fixed. The internal teeth 21 can mesh with external teeth 41 of a lock gear 40 described later, and lock the tilting of the seat back in the front-rear direction by the engagement of the lock gear 40. The gear plate 20 has a circular outer shape and is formed with internal teeth 21 by pressing a steel plate. In addition, a through hole through which a center shaft 70 described later is inserted is formed at the center of the gear plate 20.

  The fixed guide 30 is formed in a V shape at three locations on the base plate 10. The fixed guide 30 sandwiches three lock gears 40 described later, and a torsion spring 80 described later is hooked on the center of the V-shape. The fixed guide 30 is configured to be protruded by extruding a mold when the base plate 10 is formed by pressing a steel plate.

  The lock gear 40 is formed such that both side surfaces thereof are parallel to be slidable between the fixed guides 30 formed at three locations, and external teeth 41 are formed on one side connecting both surfaces to form the gear plate 20. Engagement with the internal teeth 21 is possible. The lock gear 40 is configured by quenching after pressing a steel plate, and a protruding portion 42 is erected so that the lock gear 40 can be joined to a link plate 90 described later.

  The cam 50 is disposed at a substantially central position of the base plate 10, is inserted into a center shaft 70 described later, and rotates simultaneously with the center shaft 70 and a plate 60 described later, thereby causing the lock gear 40 to move to the inner teeth 21 of the gear plate 20. It pushes in the direction which meshes with. As shown in FIG. 3, the cam 50 has a round hole 51 through which a cylindrical portion 71 of a center shaft 70 described later can be inserted, and two protrusions so as to be able to be joined to a link plate 90 described later. A part 52 is erected. The cam 50 is formed with a hooking hole 53 for hooking a torsion spring 80, which will be described later, and two engaging protrusions 54 are formed on the back surface so as to be able to be joined to a plate 60, which will be described later. Has been.

  The plate 60 is disposed at a substantially central position of the base plate 10 and is inserted through a center shaft 70 described later. As shown in FIG. 4, the first elongated hole 61 that engages with the engagement protrusion 54 of the cam 50 is formed. It is provided and rotates simultaneously with the center shaft 70 and transmits the rotation to the cam 50. The first elongated hole 61 allows the engagement protrusion 54 of the cam 50 to slide in the left-right direction in FIG. Further, the plate 60 is provided with a second elongated hole 62 through which a prismatic portion 72 of the center shaft 70 described later can be inserted. The elongated hole 62 is formed slightly larger than the diameter of the rectangular column portion 72 of the center shaft 70. A space is formed between the second elongated hole 62 and the prism portion 72 so that the plate 60 can be slightly slid in the upward and downward directions in FIG.

  The center shaft 70 is inserted through through holes formed in the center portions of the base plate 10 and the gear plate 20, respectively, and coaxially supports the base plate 10 and the gear plate 20. Further, the center shaft 70 is provided with an operation lever (not shown) as a separate member, and is inserted between the base plate 10 and the gear plate 20 when the occupant manually operates the operation lever. The plate 60, the cam 50, and a link plate 90, which will be described later, rotate simultaneously, and the engagement of the lock gear 40 with the gear plate 20 and the release thereof are performed. Near the middle portion of the center shaft 70, a cylindrical portion 71 through which the cam 50 and the link plate 90 are inserted and a rectangular column portion 72 through which the plate 60 is inserted are formed. An operation lever (not shown) can be mounted on one end of the center shaft 70, and a serration (not shown) that can be connected to a shaft (not shown) is formed on the other end. Has been.

  The torsion spring 80 is engaged with the hooking hole 53 of the cam 50 and the fixed guide 30 and pulls the cam 50 across the center shaft 70 in a diagonal line. The three torsion springs 80 urge the cam 50 to rotate in the clockwise direction in FIG.

  The link plate 90 rotates simultaneously with the cam 50 to retract the lock gear 40 inward when releasing the engagement of the lock gear 40 with the inner teeth 21 of the gear plate 20. As shown in FIG. 5, the link plate 90 can be engaged with a circular hole 91 through which the columnar portion 71 of the center shaft 70 can be inserted into a circular center position constituted by a thin wall and a projection 52 of the cam 50 A round hole 92, a long hole 93 through which the protrusion 42 of the lock gear 40 can be inserted, and a long hole 94 through which the torsion spring 94 can be inserted are formed.

  Next, the operation of the reclining device 100 according to this embodiment having the above-described configuration will be described.

  First, in the reclining device 100 according to the present embodiment, when the tilting of the seat back in the front-rear direction is locked, the occupant releases the operation lever. When the operation lever is released, the cam 50 urged in the clockwise direction by the torsion spring 80 rotates, and the lock gear 40 slides along the fixed guide 30 so as to be pushed outward in the base plate 10. The 40 outer teeth 41 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. At this time, there is a possibility that an error occurs in the engagement between the three lock gears 40 and the inner teeth 21 on the inner periphery of the gear plate 20, but the cam 50 that presses the lock gear 40 is moved in the left-right direction by the first elongated hole 61 of the plate 60. It is slidable, the plate 60 is slightly slidable in the vertical direction by the second elongated hole 62, and the cam 50 engaged with the plate 60 is also slidable in the vertical direction. Thus, the cam 50 slides in the vertical and horizontal directions to absorb the error, and the three lock gears 40 and the internal teeth 21 can be reliably engaged.

  On the other hand, when unlocking the tilting of the seat back in the front-rear direction, the occupant pulls up (or pushes down) the operating lever. When the operation lever is rotated, the center shaft 70 to which the operation lever is attached rotates counterclockwise, and further, the plate 60 through which the center shaft 70 is inserted, the cam 50 joined to the plate 50, the cam 50, The joined link plates 90 rotate simultaneously. The rotation of the cam 50 creates a space between the lock gear 40 and the outer edge of the elongated hole 93 in the link plate 90 abuts against the protrusion 42 of the lock gear 40 to pull the lock gear 40 inward, so Can be tilted.

DESCRIPTION OF SYMBOLS 10 Base plate 20 Gear plate 30 Fixed guide 40 Lock gear 50 Cam 54 Engagement protrusion 60 Plate 61 1st long hole 62 2nd long hole 70 Center shaft 80 Torsion spring 90 Link plate 100 Reclining device

Claims (1)

A circular base plate fixed to either the seat cushion or the seat back;
A circular gear plate that is rotatably mounted to the base plate and has internal teeth fixed to either the seat cushion or the seat back;
Fixed guides provided at three locations on the base plate;
A lock gear that is arranged between the fixed guides and has external teeth that slide along the fixed guides and can engage with internal teeth in the gear plate;
A cam for controlling the movement of the lock gear to mesh the lock gear with the internal teeth of the gear plate;
A reclining device comprising a plate to be engaged with an engaging protrusion standing on the cam, and a center shaft for rotationally driving the plate,
The engagement protrusion of the cam is slidably engaged with a first elongated hole formed in the plate in a specific direction, and the center shaft is slidably engaged with a second elongated hole formed in the plate in a specific direction. A reclining device characterized by being combined.

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