JP2006122122A - Position adjuster - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a position adjuster capable of surely fulfilling a locking function at the time of adjusting the angle of the seat back of a seat for a vehicle. <P>SOLUTION: For the position adjuster, a second member 2 is rotatably pivoted to a first member 1, the second member 2 has a circular-arcuate outer periphery 2a concentric to a rotary shaft 4 relating to pivoting and is provided with a plurality of notched grooves 2b along the circular arcuate outer periphery 2a, and a locking member 3 for regulating the relating rotation position of the second member 2 to the first member 1 by being locked to the notched grooves 2b is provided on the side of the first member 1. The locking member 3 can be locked / detached along the rotation radius direction of the second member 2 to/from the notched grooves 2b and is provided with a locking part 3a which bears shearing force by a receiving part 7 provided on the first member 1 and the notched grooves 2b. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a position adjusting device used for adjusting the angle of two members that rotate relative to each other. More specifically, the present invention relates to a position adjusting device that can be used when adjusting the position of a reclining device, a footrest device, an armrest device, a headrest device, or the like for a vehicle seat.

  In general, a vehicle seat such as an automobile includes a seat cushion on which an occupant is seated, a seat back that serves as a back of the occupant, and the like. Such a vehicle seat is provided with a position adjusting device between the seat cushion and the seat back so that the inclination angle of the seat back with respect to the seat cushion, that is, reclining adjustment can be adjusted.

  As a conventional position adjusting device, for example, a metal fitting member is fixed to a frame member in a seat back and a seat cushion, both metal fitting members are rotatably connected by a disk member with a gear, and opposed to the disk member with a gear. There is an apparatus that adjusts the inclination angle between the seat back and the seat cushion by engaging / separating the arranged arm member with gear by the action of a cam (see, for example, Patent Document 1).

JP 2004-97786 A

  In the position adjustment device of Patent Document 1, the force that acts on the geared arm member from the cam when the seatback position is fixed at a predetermined angular position directly reaches the geared disk member as the gear engagement force. . That is, when the geared arm member and the geared disk member are engaged, a substantially vertical pressing force acts on the engagement surface of the gear to prevent the geared disk member from rotating, or the geared arm member Rotation moment to bend is applied. For this reason, in the position adjusting device of Patent Document 1, an excessive pressing force or the like due to gear engagement is applied, whereby the geared arm member is bent or warped, or the geared arm member and the geared disk member are There is a risk of disengagement or damage to the shaft support portion of the arm member with gear.

  Accordingly, the present invention has been made in view of the above-described problems, and an object of the present invention is to provide a position adjusting device that can reliably exert a locking function when adjusting the angle of the seat back of a vehicle seat. It is to provide.

  The characteristic configuration of the position adjusting device according to the present invention is such that the second member is rotatably supported with respect to the first member, and the second member has an arcuate outer periphery that is concentric with the rotation shaft related to the axial support. And having a plurality of notch grooves along the arcuate outer periphery, and a locking member that locks in the notch grooves and restricts the relative rotational position of the second member with respect to the first member. A position adjusting device provided on a member side, wherein the locking member is lockable / detachable along the rotational radius direction of the second member with respect to the notch groove, and is provided on the first member. It is in the point provided with the latching | locking part which bears the shearing force by the receiving part and the said notch groove.

  According to the position adjusting device of this configuration, when the locking member is locked in the notch groove of the second member, a shearing force is applied to the locking member by the receiving portion provided in the first member and the notch groove. When the locking member receives the shearing force, the relative rotational position of the second member with respect to the first member can be restricted. That is, the locking member only has to bear the shearing force, and it is not necessary to press the locking member against the first member and the second member as in the prior art. For this reason, the locked state of the position adjusting device can be reliably maintained. In addition, since a large force is not applied between the locking member and the first member and the second member, the burden on each member can be reduced. For this reason, it is possible to prevent the gear from being disengaged, the locking member from being bent or warped, or the shaft support portion of the locking member from being damaged, and the reliability of the position adjusting device is improved. be able to.

  In the position adjusting device of the present invention, the receiving part may be a hole through which the locking part can penetrate.

  In the position adjusting device of this configuration, the rigidity of the first member is maintained by making the receiving portion provided in the first member a hole through which the locking portion can pass. Thereby, since operation | movement of a latching member can be stabilized, the reliability of a position adjustment apparatus can be improved.

  In the position adjusting device of the present invention, the first member is composed of a first plate member and a second plate member that sandwich the second member, and the receiving portions are provided on the first plate member and the second plate member, respectively. It is also possible to project the locking portion on both sides of the first plate member and the second plate member so as to face both receiving portions.

  In the position adjusting device of this configuration, the first member is composed of a first plate member and a second plate member that sandwich the second member. Thereby, since shear force can be disperse | distributed, durability of a 1st member can be improved. Moreover, the structure of the site | part to which a shearing force acts is made by making a latching part protrude on both sides of a 1st board | plate material and a 2nd board | plate material so that each receiving part provided in the 1st board | plate material and the 2nd board | plate material may be opposed. Since it becomes symmetrical, when a shearing force is acting on the locking part, no rotational moment is generated in the locking part. For this reason, operation | movement of a locking member and the attitude | position in a locked state can be stabilized more, and reliability improves further.

  In the position adjusting device of the present invention, the receiving portion may have two contact surfaces that can contact the locking portion from both sides in the rotation direction of the second member.

  In the position adjustment device of this configuration, the two contact surfaces of the receiving portion can contact the locking member from both sides in the rotation direction of the second member. Accordingly, the rotation of the second member can be restricted in any of the left and right directions, and the relative rotation position of the second member with respect to the first member can be fixed.

  In the position adjusting device of the present invention, the locking portion can be configured by bending an edge of the locking member.

  In the position adjusting device of this configuration, the locking portion has a simple configuration in which the edge of the locking member is simply bent, so that it is not necessary to perform complicated processing or the like on the locking member in the manufacturing process. Therefore, the position adjusting device of the present invention can be easily and inexpensively manufactured.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, for example, in the vehicle seat 50, the position adjusting device 100 according to the present invention is a connecting portion between a seat cushion frame 61 in a seat cushion 60 and a seat back frame 71 in a seat back 70. Is provided. A seated person of the vehicle seat 50 can operate the position adjusting device 100 to adjust the angle of the seat back 70 with respect to the seat cushion 60.

  FIG. 2 is a plan view showing the internal structure of the position adjusting device 100 of the present invention. 2A shows a state where the position adjusting device 100 is locked, and FIG. 2B shows a state where the position adjusting device 100 is unlocked and the angle can be adjusted. 3 shows an AA ′ sectional view of the position adjusting device 100 in the state of FIG. 2 (a), and FIG. 4 shows a BB ′ section of the position adjusting device 100 in the state of FIG. 2 (a). The figure is shown.

  The position adjusting device 100 includes a first member 1, a second member 2, and a locking member 3. The first member 1 is fixed to the seat frame 61. The second member 2 is fixed to the seat back frame 71. The second member 2 is pivotally supported by the first member 1 via the rotation shaft 4 so as to be rotatable. The second member 2 has an arcuate outer periphery 2 a concentric with the rotating shaft 4. A plurality of cutout grooves 2b that function as gears for position adjustment are formed in the arc-shaped outer periphery 2a.

  The position adjusting device 100 is further provided with a locking member 3 that locks in the notch groove 2 b and restricts the relative rotational position of the second member 2 with respect to the first member 1. The locking member 3 is provided on the first member 1 side. Here, “provided on the side of the first member 1” means that it is directly attached to the first member 1, or any place in the vicinity of the first member 1 and not on the second member 2 ( For example, it is intended to be attached to the seat frame 61).

  The locking member 3 is locked to the cutout groove 2b using the locking portion 3a of the locking member 3 as follows.

  The locking member 3 is connected to the operation arm 5 by a connecting shaft 3b. The locking member 3 and the operation arm 5 may be an integral member. In the position adjusting device 100 of the present embodiment, as can be seen from FIGS. 2 and 4, the locking member 3 and the operation arm 5 are pivotally supported on the first member 1 by the connecting shaft 3 b with the first member 1 sandwiched therebetween. The configuration to be performed is illustrated.

  As shown in FIG. 2, the operation arm 5 is provided with a clip portion 5 a for a person to hold and a hooking hole 5 b for attaching one end of a spring 6 that biases the operation arm 5. The other end of the spring 6 is attached to the first member 1 itself or the seat frame 61, for example. As a result, the locking member 3 is urged in the counterclockwise direction around the connecting shaft 3 b via the operation arm 5. Thereby, the locking member 3 is urged along the rotational radial direction of the second member 2 and engages with the notch groove 2b of the second member 2 to exert a locking action.

  The first member 1 is provided with a receiving portion 7 for receiving the locking portion 3 a of the locking member 3. The receiving portion 7 can be, for example, a hole 7a that penetrates the locking portion 3a of the locking member 3, or a U-shaped groove (not shown) that can receive the locking portion 3a. .

  For example, when the second member 2 tries to rotate with respect to the first member 1 in a state where the locking portion 3a of the locking member 3 enters the notch groove 2b, the receiving portion 7 of the first member 1 and the second portion 2 A shearing force acts on the locking portion 3a by the cutout groove 2b of the two members 2. At this time, the locking portion 3a receives the shearing force, so that the relative rotational position of the second member 2 with respect to the first member 1 can be regulated. That is, the locking portion 3a of the locking member 3 only needs to bear the shearing force, and it is not necessary to press the locking member 3 against the first member 1 and the second member 2 as in the conventional case. For this reason, the locked state of the position adjusting device 100 can be reliably maintained. In addition, since the latching | locking part 3a has sufficient intensity | strength so that it can endure the said shearing force, the relative rotation of the 2nd member 2 with respect to the 1st member 1 can be controlled reliably.

  Moreover, in the structure of this invention, since a big force is not applied between the locking member 3, the 1st member 1, and the 2nd member 2, the burden of each member can be reduced. Therefore, it is possible to prevent the gear from being disengaged, the locking member 3 from being bent or warped, or the shaft support portion of the locking member 3 from being damaged, and the reliability of the position adjusting device 100 can be prevented. Can be improved.

  The receiving part 7 is preferably a hole 7a as described above. With such a hole 7a, the rigidity of the first member 1 can be maintained, and when the shearing force is applied to the locking portion 3a, the first member 1 itself is bent or warped by the reaction force. It becomes difficult to occur. As a result, stable operation of the locking member 3 is possible, and the reliability of the position adjusting device 100 can be improved.

  In addition, the receiving portion 7 is preferably configured to have two contact surfaces (7b, 7c) that can contact the locking portion 3a from both sides in the rotation direction of the second member 2. If it is such a structure, the latching | locking part 3a of the latching member 3 will carry out the left-right direction (namely, two 2nd members 2 rotate) by the effect | action from the two contact surfaces 7b and 7c of the receiving part 7. Direction) to bear the shear force. For this reason, the operation | movement of both the rotation of the forward direction (for example, clockwise direction) and the rotation of a reverse direction (for example, counterclockwise direction) of a 2nd member can be controlled reliably. Such a bidirectional position adjuster device is particularly useful for an angle adjusting mechanism such as a reclining device or a footrest device for a vehicle seat.

  Next, the structural example of the latching | locking part 3a of the latching member 3 is shown in FIG. As shown in FIG. 5A, the locking portion 3 a can be formed by protruding a part of the locking member 3. The locking portion 3 a is designed to have a size that can contact the receiving portion 7 of the first member 1. Moreover, the latching | locking part 3a can also be comprised by bending the edge of the latching member 3, as shown in FIG.5 (b). If it is the latching | locking part 3a of the simple structure which only bent such an edge, it is not necessary to perform a complicated process etc. with respect to the latching member 3 in a manufacturing process. Therefore, the position adjusting device 100 of the present invention can be manufactured easily and inexpensively.

  5A and 5B, the number of the locking portions 3a protruding from the locking member 3 is two, but the present invention is not limited to this. Moreover, the rotational moment etc. which generate | occur | produced in the gear engagement of the conventional position adjustment apparatus do not act on the latching | locking part 3a, and only a shearing force acts from the receiving part 7 and the notch groove 2b. Therefore, the locking member 3 only has to bear the shearing force due to the receiving portion 7 and the notch groove 2b. For this reason, an unreasonable force such as a bending moment acting on the entire locking member 3 does not act, the gear of the position adjusting device 100 is disengaged, the locking member 3 is bent or warped, Alternatively, there is no inconvenience that the shaft support portion of the locking member 3 is damaged.

  Moreover, although the 1st member 1 may be one board | plate material, as shown in FIGS. 3-5, when it is set as the 2nd 1st board | plate material 1a and 2nd board | plate material 1b which hold | grip the 2nd member 2, as shown in FIGS. Since the shearing force applied to the locking portion 3a can be dispersed, the durability of the first member 1 can be further improved.

  Moreover, also in such a holding structure, the receiving part 7 is provided in the 1st board | plate material 1a and the 2nd board | plate material 1b, respectively. Here, as in the embodiment shown in FIG. 5, the locking portion 3 a of the locking member 3 is protruded on both sides of the first plate material 1 a and the second plate material 1 b so as to face both receiving portions 7. Is preferred. In this way, the configuration of the site where the shearing force acts is symmetric, so that no rotational moment is generated in the locking portion 3a when the shearing force is acting on the locking portion 3a. For this reason, compared with the case where the 1st member 1 which has the receiving part 7 is provided only in the one side of the 2nd member 2, the attitude | position in the operation | movement and the latching state of the latching member 3 can be stabilized more. As a result, the reliability of the position adjusting device 100 is further improved.

  On the other hand, in order to cancel the restriction on the relative rotational position of the second member 2 with respect to the first member 1, as shown in FIG. 2B, the operation arm 5 may be rotated in the clockwise direction. As a result, the locking member 3 is released from the notch groove 2b and the locked state is released, the second member can be rotated around the rotation shaft 4, and the seat occupant can adjust the angle of the seat back 70 to a desired position. Can be adjusted to.

  The position adjusting device of the present invention can be applied to, for example, a reclining device, a footrest device, an armrest device, a headrest device used for a vehicle seat or the like, a seat device other than a vehicle seat, and an exercise tool with an angle adjustment function. The present invention can be applied to various devices and mechanisms that perform angular position adjustment.

Schematic of the position adjusting device of the present invention in a state attached to a vehicle seat The top view which shows the internal structure of the position adjustment apparatus of this invention AA 'sectional view of the position adjusting device in the state of FIG. BB 'sectional drawing of the position adjusting device in the state of Fig.2 (a) The perspective view which shows the structural example of the latching member which has a latching | locking part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st member 1a 1st board | plate material 1b 2nd board | plate material 2 2nd member 2a Arc-shaped outer periphery 2b Notch groove 3 Locking member 3a Locking part 4 Rotating shaft 7 Receiving part 7a Hole part 7b Contact surface 7c Contact surface

Claims (5)

The second member is rotatably supported with respect to the first member, and the second member has an arcuate outer periphery concentric with the rotation shaft related to the shaft support, and a plurality of the second members are arranged along the arcuate outer periphery. A position adjusting device comprising a notch groove, and a locking member that locks in the notch groove and restricts the relative rotational position of the second member relative to the first member on the first member side. ,
The locking member can be locked / released with respect to the notch groove along the rotational radius direction of the second member, and bears a shearing force by the receiving portion provided in the first member and the notch groove. A position adjusting device provided with a locking portion.   The position adjusting device according to claim 1, wherein the receiving portion is a hole portion through which the locking portion can pass.   The first member includes a first plate member and a second plate member that sandwich the second member, and the receiving portion is provided on each of the first plate member and the second plate member, The position adjusting device according to claim 1, wherein the position adjusting device is protruded on both sides of the first plate member and the second plate member so as to face both receiving portions.   2. The position adjusting device according to claim 1, wherein the receiving portion has two contact surfaces that can contact the locking portion from both sides in a rotation direction of the second member.   The position adjusting device according to claim 1, wherein the locking portion is configured by bending an edge of the locking member.

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