JP5109674B2 - Lifter lever arrangement structure for vehicle seat - Google Patents

Description

  The present invention relates to a lifter lever arrangement structure for a vehicle seat.

As shown in FIG. 6, conventionally, in a vehicle seat such as an automobile, an operation rotating member 102 for operating a lift mechanism that adjusts the seat cushion of a seat on which an occupant is seated in the vertical direction is provided on the seat cushion. There is a lifter lever 100 for a vehicle seat that is arranged on the side surface side and operates a lift mechanism by applying a rotational operation force in connection with the operation rotation member 102.
Since the lifter lever 100 applies a rotational operation force to the operation rotation member and requires a strong fixation, the connection is fixed by a plurality of screws 104 (see, for example, Patent Document 1).
JP 2005-209158 A

However, when the lifter lever 100 is assembled, when the lifter lever 100 is set and tightened, a plurality of screwing operations are required, and there is a problem in assembling workability.
Moreover, since most of the arrangement positions of the lifter lever 100 are side surfaces on the vehicle outer side of the seat cushion and are arranged on the vehicle front side of the reclining lever 110, it is necessary to consider the design in appearance. Conventionally, the screw fixing portion 106 is covered with a cap 108 for preventing screw appearance. However, since the parting line between the lifter lever 100 and the cap 108 cannot be prevented, there is room for further improvement in design. Further, there has been a problem in reducing the number of parts of the cap 108 for preventing screw appearance.
As a result of intensive studies on the problem, the inventor has improved the lifter lever assembly workability by improving the arrangement structure of the lifter lever and the method of connecting the lifter lever and the operation rotating member of the lift mechanism. The focus is on simultaneously improving the design of the lever and reducing the number of parts.

  Thus, the present invention has been developed in view of such points, and the problems to be solved by the present invention are to improve assembly workability, improve designability, and reduce the number of parts. Another object of the present invention is to provide a lifter lever arrangement structure for a vehicle seat.

In order to achieve the above object, the lifter lever arrangement structure for a vehicle seat according to the present invention takes the following means.
According to a first aspect of the present invention, an operation rotating member for operating a lift mechanism for adjusting a position of a seat cushion of a seat on which a passenger is seated in a vertical direction is disposed on a side surface side of the seat cushion. A lifter lever arrangement structure for a vehicle seat that operates the lift mechanism by applying a rotational operating force in connection with a moving member,
The lifter lever includes a gripping portion for exerting the rotational actuation force on the actuation rotation member, and a connecting portion for transmitting the rotation actuation force to the actuation rotation member, and the gripping portion Is arranged in a radial direction from the rotation center of the actuating rotation member and in the forward direction of the vehicle, and the connecting portion forms a cap shape that covers the shaft end of the actuating rotation member. In addition, one of the concave and convex structures is formed on the inward side, which is the connection side with the operating rotary member, and the rotary power transmission with the operating rotary member is performed by the concave and convex engaging structure. A claw locking portion that can be locked with respect to the axial direction of the moving member is formed, the position where the claw locking portion is provided is an axially symmetric position, and The outer side opposite to the connecting side is actuated by a fastener from the outer side. A fastening portion for fastening and fixing to the moving member is provided, and a reclining lever for operating a reclining mechanism for adjusting a tilt angle of the seat back overlaps the vehicle exterior side of the fastening portion. It is characterized by being arranged.

According to the first aspect of the present invention, in the connection between the operation rotation member of the lift mechanism and the lifter lever, the rotational power transmission with the operation rotation member is uneven on the inner side which is the connection side with the operation rotation member. One of the concavo-convex structures performed by the engagement structure is formed. At the same time, a claw locking portion that can be locked with respect to the axial direction of the operating rotation member is formed. Further, the position where the claw locking portion is provided is a position symmetrical with respect to the axial center, and the outer side opposite to the connection side with the operating rotation member is operated and rotated by a fastener from the outer side. A fastening portion for fastening and fixing to the member is provided. As a result, conventionally, a plurality of fasteners have been fixed, but the fixing by the claw locking portion is provided to achieve one fastener. For this reason, a plurality of screwing operations are not required, and the assembling workability can be improved.
Furthermore, since the reclining lever is arranged on the vehicle outer side of the fastener, the arrangement structure is such that the fastener cannot be seen from the vehicle outer side, and a cap for preventing the screw from being visible is not required. Improvement can be achieved and the number of parts can be reduced. In addition, on the outer side of the lifter lever, it is possible to form a portion such as a curved surface in a portion where the fastening portion is unnecessary, and the design can be further improved.

  According to a second aspect of the present invention, the claw locking portion formed in the connecting portion is disposed on the vehicle rear side with respect to the rotation center of the operation rotating member of the lift mechanism, and the fastening portion is It is arranged on the vehicle front side with respect to the rotation center of the operation rotation member of the lift mechanism.

According to the second aspect of the present invention, in connection between the lifter lever and the actuating rotation member of the lift mechanism, it is possible to prevent connection disconnection that is no different from the conventional connection method.
The lifter lever has a connecting portion disposed on the side surface of the seat cushion at the position of the operating rotation member of the lift mechanism, and a gripping portion is disposed on the vehicle front side with respect to the connecting portion. In other words, the gripping portion is disposed at a position that protrudes in the radial direction from the rotation center of the actuating rotation member.
As a result, when the rotational operating force exerted on the gripping part is applied not to the rotation direction of the operation rotation member of the lift mechanism but to the vehicle outer side or the inner side, the connection between the lifter lever and the operation rotation member of the link mechanism is established. May come off. Conventionally, it has been fixed by a plurality of fasteners from the outer side of the connecting portion.
On the other hand, in this 2nd invention, it arrange | positions in the vehicle rear side with respect to the rotation center of the action | operation rotation member of a lift mechanism about the nail | claw latching part formed in a connection part, and a fastening part is the said lift mechanism. It was set as the structure arrange | positioned in the vehicle forward side with respect to the rotation center of this operation | movement rotation member.
Since the lifter lever is located on the side of the seat cushion, the gap between the gripping part and the seat cushion is small, and the gripping part has a structure that is difficult to apply force to the inside of the vehicle. Since there is no obstruction such as the side of the seat cushion on the side, a large force is likely to be applied.
Therefore, the fastening portion is arranged on the vehicle front side with respect to the rotation center of the operation rotation member of the lift mechanism to suppress the force of the grip portion toward the vehicle outer side. On the other hand, since the force of the grip portion toward the vehicle inward side is small, the claw locking portion is disposed on the vehicle rear side with respect to the rotation center of the operation rotating member of the lift mechanism. As a result, it is possible to prevent disconnection without any difference from the conventional connection method.

The present invention can obtain the following effects by taking the measures of the above inventions.
First, according to the lifter lever arrangement structure for a vehicle seat according to the first aspect of the present invention, compared to the conventional lifter lever arrangement structure, a plurality of screwing operations of the fastener are not required, and the assembling workability is improved. be able to. Further, a cap for preventing screw appearance is not required, so that the design can be improved and the number of parts can be reduced. Moreover, since it becomes possible to make the site | part from which the fastening part became unnecessary in the outer side of a lifter lever into shapes, such as a curved surface, the design property can be improved further.
Next, according to the lifter lever arrangement structure for a vehicle seat according to the second aspect of the present invention, it is possible to prevent disconnection that is no different from the conventional connection method.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is an overall perspective view showing a frame configuration of a vehicle seat provided with a lift mechanism. FIG. 2 is a perspective view showing each component of the arrangement structure of the lifter lever. 3A is an overall perspective view of the lifter lever as viewed from the vehicle outer side. FIG. (B) The figure is the whole perspective view which looked at the lifter lever from the vehicle inner side. 4A is a side view of the uneven engagement structure of the connecting portion of the lifter lever as seen from the vehicle inner side. (B) The perspective view which showed the uneven | corrugated engagement structure of the connection part of a lifter lever. FIG. 5 is a side view of the arrangement structure of the lifter lever.

An arrangement structure of the lifter lever 54 according to the embodiment of the present invention will be described.
First, the lift mechanism 48 operated by the lifter lever 54 will be described. FIG. 1 shows a frame structure 10 of a vehicle seat provided with a lift mechanism 48. The frame structure 10 of the vehicle seat shows the structure of the front seat of the vehicle in the passenger seat. The vehicle seat frame structure 10 is roughly composed of a seat back frame 20, a reclining mechanism 22, a link mechanism 30, a seat cushion frame 32, a slide rail 42, and a lift mechanism 48.
The link mechanism 30 includes an interlocking rod 40F, an interlocking rod 40B, a link 36F, and a link 36B. The slide rail 42 includes an upper rail 42U and a lower rail 42L. The lift mechanism 48 includes a pinion gear 50, an operation rotation member 52, and a lifter lever 54. A seat cushion is attached to the seat cushion frame 32, and a backrest cushion is attached to the seat back frame 20, but these configurations are normal mounting configurations and are not shown.

The seat cushion frame 32 is supported on the slide rail 42 via the link mechanism 30. Therefore, the seat cushion frame 32 is slidable in the vehicle front-rear direction on the slide rail 42.
The seat back frame 20 is supported so as to be able to tilt back and forth around a reclining shaft 24 of a reclining mechanism 22 provided at a vehicle rear portion of the seat cushion frame 32.

  Between the slide rail 42 and the seat cushion frame 32, a link mechanism 30 that supports the seat cushion frame 32 so as to be vertically movable with respect to the slide rail 42 is interposed at the left and right positions. The seat cushion frames 32 are arranged so as to stand on upper portions of the upper rails 42U of the left and right slide rails 42, respectively. The interlocking rod 40F and the interlocking rod 40B are rotatably supported between the left and right seat cushion frames 32 at the front and rear positions of the vehicle, and the upper ends of the links 36F and 36B are rotatably attached. It has been. The lower ends of the links 36F and 36B are rotatably attached to the upper rails 42U of the left and right slide rails 42. The upper rail 42U is supported by the lower rail 42L so as to be slidable in the longitudinal direction of the sliding vehicle.

  Thus, the seat cushion frame 32, the slide rail 42, and the link mechanism 30 are configured to interlock with the parallelogram shape. Thus, when the seat cushion frame 32 is moved downward while moving backward, the seat cushion is moved downward, and when the seat cushion frame 32 is moved upward while moving forward, the seat cushion is moved upward. It will be moved.

  Of the links 36B, a sector gear 38 is formed integrally with the link 36B on the left side as viewed from the seated person in FIG. A pinion gear 50 is engaged with the sector gear 38 of the link 36B. The pinion gear 50 is connected to the operation rotation member 52 through an opening 34 (see FIG. 2) provided on the side surface of the seat cushion frame 32, and the connection between the operation rotation member 52 and the lifter lever 54 is achieved. The part 58 is connected. As a result, when the pinion gear 50 is rotated by exerting a rotational operating force on the grip portion 56 of the lifter lever 54, the rotational operating force is transmitted to the sector gear 38 and the link 36B is moved up and down. The seat cushion is moved up and down by 30.

Next, each component of the arrangement structure of the lifter lever 54 will be described.
FIG. 2 is a perspective view showing each component of the arrangement structure of the lifter lever 54. As shown in FIG. 2, the reclining mechanism 22, the reclining lever 26, the shield 44, the operation rotating member 52, and the lifter lever 54 are roughly configured on the side surface of the seat cushion frame 32. The reclining lever 26 is connected to the reclining mechanism 22 provided at the vehicle rear portion of the side surface of the seat cushion frame 32 through an opening hole 46 provided in the shield 44 formed on the side surface of the seat cushion. A lifter lever 54 is disposed on the vehicle front side of the reclining lever 26. The lifter lever 54 is connected to the operation rotation member 52 through an opening hole 46 provided in the shield 44 formed on the side surface of the seat cushion. The operation rotation member 52 is connected to the pinion gear 50 (see FIG. 1) through the opening hole 34 provided in the side surface portion of the seat cushion frame 32.

Next, the connection structure of the lifter lever 54 will be described.
As shown in FIG. 2, the lifter lever 54 is connected to the operation rotation member 52. The operation rotation member 52 has a structure for transmitting the rotational power by the concave-convex engagement structure.
As shown in FIGS. 3A and 3B, the lifter lever 54 connects the connecting portion 58 connected to the actuating rotation member 52, the gripping portion 56 that is an operation part, and the connecting portion 58 and the gripping portion 56. Connecting portion 57 to be connected. The grip portion 56 is formed slightly wider so that the operator can easily grip it, but the connection portion 57 is formed slightly narrow. Therefore, from the viewpoint of securing the strength of the connecting portion 57, as shown in FIG. 3B, a honeycomb structure in which ribs are erected on the back surface of the connecting portion 57 is formed. Thus, the strength of the connecting portion 57 can be secured while reducing the weight of the lifter lever.
As shown in FIG. 3A, the connecting portion 58 of the lifter lever 54 forms a cap shape that covers the shaft end of the operating rotation member 52 (see FIG. 2). Then, as shown in FIGS. 3B and 4A and 4B, on the vehicle inward side, which is connected to the operation rotation member 52 (see FIG. 2), there is an operation rotation member. Another uneven structure 66 corresponding to the uneven structure 52 is formed. When the concavo-convex structure 66 is engaged, the rotational operation force exerted on the lifter lever 54 is transmitted to the operation rotation member 52 (see FIG. 2) and further transmitted to the pinion gear 50 (see FIG. 1). Since the link 36B (see FIG. 1) is moved up and down by rotating (see FIG. 1), the seat cushion is moved up and down by the link mechanism 30 (see FIG. 1) interlocked therewith.

  As shown in FIGS. 3 (B), 4 (A), and 4 (B), an axial direction is provided on the vehicle inner side of a connecting portion 58 that is a connecting side with the operation rotation member 52 (see FIG. 2). The nail | claw latching | locking site | part 64 which can be latched with respect to is formed. Then, in the vicinity of the claw locking portion 64, the end of the concavo-convex structure 66 is cut into a taper shape toward the claw locking portion 64 so that the claw locking portion 64 can be easily locked when connected to the actuating rotation member 52. A lacking inclined shape 68 is formed. In this embodiment, the claw locking portion 64 is disposed at a position on the vehicle rear side with respect to the rotation center of the operation rotation member 52.

  Also, as shown in FIG. 3A, the position where the claw locking portion 64 is provided is an axially symmetric position, and the connection side with the operation rotation member 52 (see FIG. 2). On the opposite vehicle outer side, there is a fastening portion 60 for fastening and fixing to the operation rotating member 52 (see FIG. 2) by a fastener 62 (see FIG. 2) such as a screw or a screw from the vehicle outer side. ing. That is, the position of the fastening portion 60 is a position on the vehicle front side with respect to the rotation center of the operation rotation member 52 of the lift mechanism 48.

Since the lifter lever 54 is disposed on the side surface of the seat cushion, the gap between the gripping portion 56 and the seat cushion is small, and the gripping portion 56 has a structure in which a force is not easily applied to the vehicle inner side. Since there is no obstruction such as the side surface of the seat cushion on the outer side of the vehicle 56, a large force is likely to be applied.
Therefore, the fastening portion 56 is disposed on the vehicle front side with respect to the rotation center of the operation rotation member 52 of the lift mechanism 48 to suppress the force of the grip portion 56 toward the vehicle outward side. On the other hand, since the force of the grip portion 56 toward the vehicle inward side is small, the claw locking portion 64 is disposed on the vehicle rear side with respect to the rotation center of the operation rotation member 52 of the lift mechanism 48. As a result, it is possible to prevent disconnection without any difference from the conventional connection method.
As a result, in the past, a plurality of fasteners 62 (see FIG. 2) were fixed, but by providing fixation by the claw locking portion 64, the fastener 104 (see FIG. 6) was unified. Yes. This eliminates the need for multiple screwing operations of the fastener and improves assembly workability.

Further, as shown in FIG. 5, a reclining mechanism 22 for adjusting the inclination angle of the seat back is operated on the vehicle outer side of the fastening portion 60 provided in the connecting portion 58 of the lifter lever 54. The reclining levers 26 are arranged so as to overlap each other.
As shown in FIG. 5, the reclining lever 26 indicated by an imaginary line shows a state when the reclining lever 26 is operated. For this reason, the reclining lever 26 is arranged on the vehicle outer side of the fastening portion 60 so that the fastening portion cannot be seen when the reclining lever 26 is in an inoperative state. That is, the configuration in which the “reclining lever 26 is arranged in an overlapping manner” is, in other words, “the inclination angle of the seat back is set on the vehicle outer side of the fastening portion 60 provided in the connecting portion 58 of the lifter lever 54. The reclining lever 26 for actuating the reclining mechanism 22 for adjustment is arranged so as to overlap in a non-actuated state. "
Thereby, the arrangement structure is such that the fastening portion 60 is not visible from the outside of the vehicle, and a cap for preventing screw visibility is not required, so that the design can be improved, and the number of parts can be reduced. In addition, since the portion where the fastening portion 60 is unnecessary on the outer side of the lifter lever 54 (that is, the vehicle outer side of the claw locking portion 64) can be formed into a curved surface or the like, the design is further improved. Can be improved.
In addition, since the opening hole 46 of the shield 44 uses the opening hole 46a for operating the reclining lever 26 and the opening hole 46b for operating the lifter lever 54 as one opening hole 46, a plurality of opening holes are provided. It is the structure which does not need to form. Thereby, the workability of the shield 44 is improved.

Furthermore, the position of the claw locking portion 64 formed in the connecting portion 58 is located on the vehicle rear side and on the lower side with respect to the rotation center of the operation rotating member 52 of the lift mechanism 48, and
The position of the fastening portion 60 is preferably disposed on the vehicle front side and on the upper side with respect to the rotation center of the operation rotation member 52 of the lift mechanism 48. Thereby, it can be set as the arrangement structure which the reclining lever overlapped with the fastening part 60 further in the non-operation state.

The lifter lever arrangement structure of the vehicle seat of the present invention is not limited to the appearance, configuration, processing, display example, and the like described in the present embodiment, and various modifications, additions, and the like can be made without changing the gist of the present invention. Can be deleted.
For example, in the above-described embodiment, the configuration of the front seat of the vehicle in the front passenger seat has been described. However, the present invention is not limited to this and can be applied to the driver seat and the rear seat of the front seat.

It is the whole perspective view showing the frame composition of the vehicular seat provided with the lift mechanism. It is the perspective view which showed each component of the arrangement | positioning structure of a lifter lever. (A) The figure is the whole perspective view which looked at the lifter lever from the vehicle outside side. (B) The figure is the whole perspective view which looked at the lifter lever from the vehicle inner side. FIG. 4A is a side view of the concave-convex engagement structure of the connecting portion of the lifter lever as viewed from the vehicle inner side. (B) The perspective view which showed the uneven | corrugated engagement structure of the connection part of a lifter lever. It is a side view of the arrangement structure of a lifter lever. It is the perspective view which showed each component of the arrangement structure of the conventional lifter lever.

Explanation of symbols

10 Frame Configuration 20 Seat Back Frame 22 Reclining Mechanism 24 Reclining Shaft 26 Reclining Lever 30 Link Mechanism 32 Seat Cushion Frame 34 Opening Hole 36F Link 36B Link 38 Sector Gear 40F Interlocking Rod 40B Interlocking Rod 42 Slide Rail 42U Upper Rail 42L Lower Rail 44 Shield 46 Opening hole 46a Opening hole 46b Opening hole 48 Lift mechanism 50 Pinion gear 52 Actuating rotation member 54 Lifter lever 56 Holding part 57 Connection part 58 Connection part 60 Fastening part 62 Fastening part 64 Claw locking part 66 Uneven structure 68 Inclined shape

Claims (2)

An operation rotation member for operating a lift mechanism that adjusts the position of the seat cushion of the seat on which the occupant is seated in the vertical direction is disposed on the side surface side of the seat cushion. A lifter lever arrangement structure for a vehicle seat that operates the lift mechanism by exerting
The lifter lever includes a gripping portion for exerting the rotational actuation force on the actuation rotation member;
A connecting portion for transmitting the rotational actuation force to the actuation rotation member;
The gripping portion is arranged in a radial direction from the rotation center of the operation rotation member and in a vehicle forward direction,
The connecting portion forms a cap shape that covers the shaft end of the actuating rotation member;
On the inner side, which is the connection side with the operation rotation member, is formed with one of the concavo-convex structure that performs the rotational power transmission with the operation rotation member with the concavo-convex engagement structure,
A claw locking portion that can be locked with respect to the axial direction of the operation rotating member is formed,
The position where the claw locking part is provided is an axially symmetric position, and on the outer side opposite to the connection side with the operating rotation member, the operating rotation is performed by a fastener from the outer side. Has a fastening part to fasten and fix the moving member,
Further, a reclining lever for operating a reclining mechanism for adjusting a tilt angle of a seat back is disposed on the vehicle outer side of the fastening portion so as to overlap with each other. Arrangement structure. The lifter lever arrangement structure for a vehicle seat according to claim 1,
The claw locking portion formed in the connecting portion is disposed on the vehicle rear side with respect to the rotation center of the operation rotating member of the lift mechanism,
The lifter lever arrangement structure for a vehicle seat, wherein the fastening portion is arranged on the vehicle front side with respect to the rotation center of the operation rotation member of the lift mechanism.

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