JP2005287724A - Armrest of vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an armrest reducing an operation loading of a lock cam caused by engaged with or separating from a regulating pin, smoothly locking and releasing the lock cam and producing no abnormal noise caused by the engagement or separation of the lock cam. <P>SOLUTION: This armrest is so constituted that a regulating pin 2 is projected from the side of a seat back in the upper position of a pivot shaft 1 toward a side frame of an armrest body A, the regulating pin 2 is provided on a board face of the side frame 3a and received by a guide hole 4, the lock cam 5 engaged with or separated from the regulating pin 2 is journaled to the inside of the side frame 3a, and a bush 8 having a resin coating of polytetrafluoroethylene on the inner face side in slide contact with the regulating pin 2 is provided on the axis of the regulating pin 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an armrest for a vehicle seat provided with a siderest of a seatback constituting a main seat so that an armrest body can be set up in the same manner as a standing posture of the seatback or can be tilted forward from a side portion of the seatback. It is.

  In vehicle seats, the pivot shaft protrudes laterally from below the side of the seat back that constitutes the main seat, and the pivot shaft is inserted in the width direction from below the side of the armrest body and spanned between the side frames. Some armrest bodies are provided with an armrest that can be stood or tilted forward from the side portion of the seatback in the same manner as the standing posture of the seatback.

  The armrest protrudes from the position above the pivot shaft on the side frame of the seat back toward the side frame of the armrest body adjacent to the seat back, and the armrest has an arc shape provided on the plate surface of the side frame. Since it is received by the guide hole, the movement of the armrest body can be guided by the restriction pin.

  Also, a lock cam that can be engaged with or detached from the restriction pin is mounted on the inside of the side frame, and a spring that always pulls the lock cam in the engagement direction with the restriction pin is spanned between the side frame and against the spring. The armrest body is configured to have an operation lever for releasing the lock cam from the restriction pin.

  Since the armrest is made of metal as the regulation pin and the lock cam, the contact pressure with each other is high, and it is difficult to release the lock or the operation load accompanying the lock release is large. At the same time, abnormal noise is generated due to the lock cam rubbing against the surrounding components including the restriction pin.

  The problem to be solved by the present invention is to reduce the operation load associated with the engagement or disengagement of the lock cam with the restriction pin, to enable the lock cam to be locked or released smoothly, and to engage or disengage the lock cam. The armrest is configured so that no abnormal noise is generated.

  According to a first aspect of the present invention, a steel plate bush having a cylindrical portion that fits on the axis of the regulating pin and having a resin coating of tetrafluoroethylene resin applied to the inner surface side of the cylindrical portion that is in sliding contact with the regulating pin is provided. It is provided on the axis line.

  According to a second aspect of the present invention, an overhanging flange portion facing the side frame of the armrest body is provided on one cylinder end side of the cylindrical portion, and a resin coating of tetrafluoroethylene resin is applied to the inner surface side of the cylindrical portion that is in sliding contact with the regulating pin. In addition, a steel plate bush provided on the flange surface of the overhanging flange portion facing the side frame of the armrest body is provided on the axis of the regulation pin.

  Since the armrest of the vehicle seat according to the first aspect of the present invention includes a bush made of a steel plate in which a resin coating of tetrafluoroethylene resin having a low friction coefficient is applied to the inner surface side of the cylindrical portion that is in sliding contact with the regulation pin, the lock cam Is engaged with or disengaged from the regulating pin, the bush rotates on the axis of the regulating pin by the resin coating of tetrafluoroethylene resin. For this reason, it is possible to reduce the operation load associated with the engagement or disengagement of the lock cam with the restricting pin, to smoothly lock or release the lock cam, and to prevent the generation of noise due to the engagement or disengagement of the lock cam. it can. In addition, since the resin coating of the tetrafluoroethylene resin can withstand long-time use over a wide temperature range, easy operability can be maintained for a long time.

  In the armrest of the vehicle seat according to the second aspect of the present invention, the overhanging collar portion facing the side frame of the armrest body is provided at one end of the cylindrical portion, and the resin coating of tetrafluoroethylene resin is provided on the overhanging flange surface. Since the bushing on the surface is provided, the lock cam is prevented from sliding on the side frame of the armrest body. Due to the characteristics of the tetrafluoroethylene resin coating, as the lock cam is engaged or disengaged from the regulating pin, the bushing It can be configured to rotate on the axis of the restriction pin.

  FIG. 1 shows a vehicle seat provided with an armrest having a basic structure in common with a general example. In the vehicle seat, since the armrest body A includes the headrest H, the vehicle seat is assembled so as to serve as a seatback in the same standing posture as the seatback B of the main seat.

  The armrest body A is based on a pivot shaft 1 projecting laterally from the lower side of the seat back B constituting the main seat, and a regulation pin 2 projecting from the side of the seat back B at a position higher than the pivot shaft 1 Further, like the standing posture of the seat back B, the seat back B is provided so as to be able to be tilted forward or tilted forward from the side portion of the seat back B. Both the pivot shaft 1 and the restriction pin 2 are provided so as to protrude from the side frame of the seat back B.

  Since the pivot shaft 1 is inserted in the width direction from the lower side of the side of the armrest main body A and spans between the side frames 3a and 3b, the armrest main body A is stood or seated in the same manner as the standing posture of the seat back B. It is provided as a main shaft that supports the back B so as to be able to fall forward. The restriction pin 2 is provided so as to protrude toward the side frame 3a of the armrest body A adjacent to the seat back B.

  In the following, referring to FIG. 2, the regulation pin 2 is received by an arcuate guide hole 4 provided on the plate surface of the side frame 3 a, and is thus provided to guide the movement of the armrest body A. The guide hole 4 is formed so as to exhibit an arc shape corresponding to the rotation range of the armrest main body A from the standing posture and the collapsed posture with the pivot shaft 1 as the center. A hook-like lock cam 5 that can be engaged with or detached from the restriction pin 2 is provided in the vicinity of the restriction pin 2.

  Since the lock cam 5 is mounted on the inner side of the side frame 3a by the support shaft 5a, the lock cam 5 is attached so as to be swingable with the cam base side supported by the support shaft 5a facing forward and the cam front end facing rearward. . The lock cam 5 is always tension-supported so as to be engaged with the regulation pin 2 by a spring 5b that extends between the cam base side and the plate surface of the side frame 3a. Further, an operation lever 6 (see FIG. 1) provided on the upper back portion of the armrest main body A is connected to the tip end side of the cam with a wire cable 7 so that the lever can be moved out of the regulation pin 2 against the spring 5b by operating the lever. ing.

  Under the basic configuration described above, a steel plate bush 8 is fitted and mounted on the axis of the restriction pin 2. As the bush 8, as shown in FIG. 3, a cylindrical portion 8 a that fits on the axis of the restriction pin 2 is mainly used, and an overhanging flange portion 8 b that faces the side frame 3 a of the armrest body A is provided at one end of the cylindrical portion 8 a. The one provided on the side is provided. The bush 8 is preferably provided with a slit 8c that vertically divides the side surface in order to easily fit on the axis of the restriction pin 2.

  In the bush 8, as shown in FIG. 4, a resin coating 8 d of a tetrafluoroethylene resin having a low friction coefficient is provided on the inner surface side of the cylindrical portion 8 a that is in sliding contact with the regulation pin 2, and the side frame 3 a of the armrest main body A. It is given to the surface side of the overhanging flange portion 8b facing each other. In addition, since the mesh-shaped dimple 8e is press-formed to the steel plate which becomes the main body of the bush 8, it can form so that the frictional resistance with the lock cam 5 may be decreased.

  As shown in FIG. 5, the bush 8 includes a regulation pin 2 provided with a stop edge 2b projecting from the main shaft portion 2a on the tip side, and the cylindrical portion 8a is fitted to the main shaft portion 2a, and the overhanging flange portion 8b is connected to the side. It can be fitted and mounted so as not to come off relative to the plate surface of the frame 3a.

  In the vehicle seat armrest constructed as described above, the armrest body A does not fall forward because the lock cam 5 is normally pulled and biased by the spring 5b and engaged with the restriction pin 2. Thereby, the armrest main body A can be used also as a seat back.

  When used as an armrest, when the lock cam 5 is pulled by the operation lever 6 via the cable wire 7, the lock cam 5 swings upward with the support shaft 5a as a fulcrum, so that it is disengaged from the restriction pin 2. As a result, the armrest body A can be pushed forward through the guide hole 4. When the armrest body A is in the collapsed state, as shown in FIG. 6, the lock cam 5 is separated from the restriction pin 2 and the tension by the operating lever 6 is released, so that the tension state by the original spring 5b is maintained. Be drunk.

  When returning the armrest main body A to the original standing posture, the armrest main body A may be tilted and lifted from the front side without relying on the lever operation. When the armrest main body A is returned to the original standing posture, the lock cam 5 kept in the tensioned state by the spring 5b is engaged with the restriction pin 2, so that the armrest main body A is locked in the standing posture.

  As the lock cam 5 is engaged with or disengaged from the restriction pin 2, the bush 8 slides and rotates on the axis of the restriction pin 2 by the cylindrical portion 8a to which the resin coating 8c of tetrafluoroethylene resin is applied. The overhanging flange 8b slides and rotates with the side frame 3a of the armrest body A. For this reason, the operation load can be reduced, and the lock cam 5 can be smoothly locked or released. Further, it is possible to prevent the generation of noise due to the engagement or disengagement of the lock cam 5.

  The bush 5 is mainly composed of a steel plate, and the resin coating 8d of tetrafluoroethylene resin can withstand long-time use over a wide temperature range, so that easy operability is maintained for a long time. it can.

It is a front view which shows generally the vehicle seat provided with the armrest which concerns on this invention. It is explanatory drawing which shows the engagement thru | or releasing mechanism of the lock cam with which the armrest of FIG. It is a perspective view which shows the bush with which the engagement or disengagement mechanism of the lock cam of FIG. 2 is equipped. It is sectional drawing which shows the bush of FIG. 3 typically. It is sectional drawing which attaches and shows the bush of FIG. 3 to a control pin. It is explanatory drawing which shows the engagement thru | or disengagement mechanism of the lock cam of FIG. 2 in the fall state of an armrest.

Explanation of symbols

B Seat back of main seat A Armrest body 1 Pivot shaft of armrest body 2 Restriction pin 3a, 3b Side frame of armrest body 4 Arc-shaped guide hole 5 Lock cam 5a Support shaft of lock cam 5b Lock cam spring 6 Control lever 7 Control lever Cable wire 8 Bush 8a Bush cylindrical part 8b Bush overhang 8d Tetrafluoroethylene resin coating

Claims (2)

The pivot shaft protrudes laterally from the lower side of the seat back that constitutes the main seat, and the pivot shaft is inserted in the width direction from the lower side of the armrest body to span between the side frames. As with the standing posture of the seat back on the shaft, it is provided so that it can be stowed or tilted forward from the side of the seat back,
A restriction pin protrudes from the side of the seat back toward the side frame of the adjacent armrest body at a position above the pivot shaft, and an arc-shaped guide hole centering on the pivot shaft is provided on the plate surface of the side frame. Is received by the guide hole, a lock cam that can be engaged with or disengaged from the restriction pin is mounted on the inside of the side frame, and a spring that constantly pulls the lock cam in the direction of engagement with the restriction pin is stretched between the side frame and the spring. In the armrest of the vehicle seat provided with an operation lever on the armrest body that causes the lock cam to be separated from the regulation pin against
It has a cylindrical part fitted on the axis of the regulating pin, and is provided with a steel plate bush on the inner side of the cylindrical part in sliding contact with the regulating pin on the axis of the regulating pin. An armrest for a vehicle seat. An overhang collar that faces the side frame of the armrest body is provided on one cylinder end side of the cylindrical portion, and a resin coating of tetrafluoroethylene resin is applied to the inner surface side of the cylindrical portion that is in sliding contact with the regulating pin, and the side frame of the armrest body 2. The armrest according to claim 1, wherein a steel plate bush provided on the flange surface of the overhanging flange portion facing each other is provided on the axis of the restriction pin.

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