JPH0510698Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an armrest position adjustment device.

[Prior art]

The armrest is attached to one side of the seat back so that it can rotate forward and backward, and when not in use, it can be rotated backwards and stored in an inverted position, and when in use, it can be rotated forward and moved horizontally forward. There are some that protrude and some that are equipped with a position adjustment device that can adjust the angle of inclination when in use.

In addition, this type of position adjustment device has the simplest structure, as shown in Japanese Utility Model Application No. 62-111456 and Japanese Utility Model Application No. 62-21954, which is fixed to the frame side of the seat bag. a support shaft that protrudes to one side of the seat back and is fitted with the base end of the armrest so as to be rotatable in the front-rear direction; A coil spring is disposed on the armrest side and the other end of the coil spring is locked, and the coil spring is rotated in the direction of unwinding by an external operation. There is an armrest position adjustment device that includes an operating member that applies force.

In this type of position adjustment device, the coil spring is normally tightened against forward rotation of the armrest, so rotation of the armrest in the same direction is restricted, while the coil spring is tightened against forward rotation of the armrest. Since the spring is unwound, the armrest can be freely rotated in the same direction. Therefore, when operated, the coil spring loosens toward the unwinding side, allowing forward rotation of the armrest, and by releasing the operation member, further rotation is restricted at that rotation position. It is something that will be done. Furthermore, when retracting the armrest from the forward protruding use position to the rear inverted position, the armrest can be rotated quickly without operating the operating member since the direction of rotation of the armrest is on the unwinding side of the coil spring. Ru.

[The problem that the idea attempts to solve]

However, the above-mentioned armrest cannot be rotated forward unless the operating member is continuously operated, and it is difficult to rotate the armrest from the stored position to the usable position.

Therefore, an object of the present invention is to maintain the operating state of the operating member by one operation from the storage position of the armrest to a predetermined usable position, so that the armrest can be operated without continuing to operate the operating member. The purpose is to allow the armrest to be rotated from the stored position to the usable position at any time, and then to be able to adjust the armrest to any inclination angle.

[Means to solve the problem]

In the position adjustment device of the above-mentioned type, the present invention provides an actuation plate having an arcuate protrusion of a predetermined length along the outer periphery of the support shaft on the outer peripheral edge thereof, and also provides the actuation plate on the operating member. An engaging member that engages with the outer periphery and restricts the return of the operating member to the non-operating side is connected, and the armrest rotates the arcuate protruding portion of the operating plate from a rear inverted position to a forward protruding position. The present invention is characterized in that it is formed in a shape that engages with the engaging member during movement.

[Functions and effects of the idea]

In such a configuration, the plate is fixed such that one end of the arcuate projection is in the storage position of the armrest and the other end is in the usable position. As a result, when the armrest is in the retracted position, forward rotation is restricted by the action of the coil spring and maintained in an upright position, and the coil spring is loosened to the unwinding side by operating the operating member, allowing the armrest to rotate forward. When the armrest rotates forward, the engaging member rides on the arcuate protrusion and prevents the operating member from returning to the non-operating side, thereby maintaining the operating state. Therefore, with the operation member released, the armrest can be rotated forward to the usable position, and at the same position, the engagement that has been sliding on the arcuate protrusion The member descends from the protrusion. As a result, the operating member returns to the non-operating state, and further forward rotation of the armrest is restricted. Thereafter, by slightly rotating the armrest forward while operating the operating member, the inclination angle of the armrest can be adjusted to a desired value.

In addition, in order to retract the armrest from this state, the armrest may simply be rotated rearward. The rearward rotation of the armrest is the unwinding side of the coil spring, so it can be rotated in the same direction, and when this rotation occurs, the engaging member slides on the outer periphery of the actuating plate without being restricted in any way. to return to its original position.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show an armrest position adjustment device according to the present invention. The position adjusting device 10 is incorporated into a frame 22 of an armrest 21 shown in FIG. It is held in a substantially horizontal protruding state at the use position.

Thus, the position adjustment device 10 includes a support shaft 11, a movable plate 12, a coil spring 13, and an actuation plate 14, as well as an operation lever 15 and a pair of swing levers 16 and 17 that constitute an operation mechanism.
and a link 18. The support shaft 11 has a stepped cylindrical shape as shown in FIG. 4, is fixed to the frame 24 of the seat bag 23 with bolts 25, and projects to one side of the seat bag 23. The movable plate 12 is integrally provided with a collar 12a, and is fixed to the armrest frame 22 to support the support shaft 11.
The armrest 21 is rotatably fitted onto the support shaft 11 to support the armrest 21 on the support shaft 11. The coil spring 13 is wound around the outer periphery of the support shaft 11 and the collar 12a and is in close contact with their outer peripheral surfaces, and has one end locked to the movable plate 12 and the other end locked to the other end of a link 18, which will be described later. has been done. In such a coil spring 13, the armrest 21
The forward direction of rotation is on the seaming side. The actuation plate 14 is fixed to the outer end of the support shaft 11. In particular, as shown in FIG.
4a, and both ends of the protrusion 14a are formed into engagement recesses 14b and 14c.

The operating lever 15 constituting the operating mechanism is attached to the armrest frame 22 so as to be slidable in the longitudinal direction. Each of the swing levers 16 and 17 is swingably assembled to the armrest frame 22 and positioned substantially perpendicular to the operating lever 15 and in parallel with each other, with one swing end of each pivoting towards the operating lever 15. movably connected. The first swing lever 16 is connected to the intermediate portion of the operating lever 15, and one end of a link 18 is rotatably connected to the other swing end. The other end of the coil spring 13 is locked to the other end of the link 18. The second swing lever 17 is connected to the tip of the operating lever 15, and has an engagement pin 17a at the other swing end. The coil spring 13 uses its winding force to bias the link 17 in the direction of arrow A1 in FIG. The pin 17a is elastically brought into contact with the outer periphery of the actuating plate 14. The engagement pin 17a engages with the first engagement recess 14b of the actuation plate 14 when the armrest 21 is in the retracted position (inverted state).

In the position adjustment device 10 having such a configuration, when the armrest 21 is in the retracted position, the engagement pin 1
7a is engaged with the first engagement recess 14b of the actuation plate 14. In this state, the forward rotation direction of the armrest 21 is the same as that of the coil spring 1.
3, the armrest 21 is prevented from rotating forward and is held in an inverted state. When the operating lever 15 is pushed in in this state, the operating lever 15 slides in the direction of arrow B2, causing both swinging levers 16 and 17 to swing counterclockwise as shown in FIG. 2, causing the link 18 to move in the direction of arrow A2. The coil spring 13 is pulled toward the unwinding side and loosened, and at the same time, the engagement pin 17a is separated from the first engagement recess 14b toward the outer circumference as shown in FIG. Therefore, the armrest 21 can be rotated forward, and when the armrest 21 is rotated forward, the engagement pin 17a of the second swing lever 17 slides on the arcuate protrusion 14a of the actuation plate 14. Since the second swing lever 17 is held in the swing state while the engagement pin 17a is located on the arcuate protrusion 14a, the operating lever 15 and the first swing lever 16
The return of the link 18 is regulated, and the operating lever 15 is maintained in the operating state, so that the armrest 21 can be rotated to the usable position at any time without operating the lever 15.

During the rotation of the armrest 21, when the engagement pin 17a comes off the arcuate protrusion 14a of the actuation plate 14 and engages the second engagement recess 14c, the second swing lever 17 returns and the operation lever 15, In order to return the first swing lever 16 and link 18,
The coil spring 13 is tightened to restrict further rotation of the armrest 21. Thereafter, by rotating the armrest 21 while operating the operation lever 15, the armrest 21 is moved to the third position.
The inclination angle is adjusted within the range C to D in the figure. In this case, the lower (front) armrest 21
Since the coil spring 13 is on the tightening side, the armrest 21 is held in its used state. Further, since the armrest 21 is rotated upward (rearward) on the unwinding side of the coil spring 13, the armrest 21 can be rotated without operating the operating lever 15.

Note that since the rearward rotation direction of the armrest 21 is the unwinding side of the coil spring 13, when the armrest 21 is stored, it is sufficient to simply rotate the armrest 21 rearward. As a result, the engagement pin 17a engages with the second engagement recess 14c and then disengages, slides on the arcuate protrusion 14a, and engages with the first engagement recess 14b, and the armrest 21 is not shown. Further backward rotation is restricted by the stopper.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a position adjustment device according to an embodiment of the present invention, Fig. 2 is a plan view of the device, Fig. 3 is an explanatory diagram of the operation of the device, and Fig. 4 is an arrow shown in Fig. 2.
5 is a perspective view of a vehicle seat equipped with an armrest incorporating the same device. Explanation of symbols, 10...Position adjustment device, 11...
Support shaft, 12... Movable plate, 12a... Collar, 13... Coil spring, 14... Actuation plate, 14a... Arc-shaped protrusion, 15... Operation lever, 16, 17... Rocking lever, 17a ……
Engagement pin, 18... link, 21... armrest.

Claims (1)

[Scope of utility model registration request] A support shaft is fixed to the frame side of the seat bag and protrudes to one side of the seat bag, and the base end of the armrest is fitted so as to be rotatable in the front and back direction. a coil spring that is locked on the armrest side so that the forward rotation direction of the armrest is on the winding side;
An operating member is disposed on the armrest side, the other end of the coil spring is locked, and an operating member is provided that applies a return force on the unwinding side to the coil spring by external operation, and when not in use, the operating member is rotated rearward to form an inverted position. In the position adjustment device for an armrest that is stored in the armrest and is rotated and protruded forward when in use, an actuation plate is provided on the support shaft side and has an arcuate protrusion of a predetermined length along the outer circumference of the support shaft; ,
An engaging member that engages with the outer periphery of the operating plate to restrict return of the operating member to the non-operating side is connected to the operating member, and the arcuate protrusion of the operating plate is connected to the armrest when the armrest is in an inverted position at the rear. An armrest position adjustment device, characterized in that the armrest position adjustment device is formed in a shape that engages with the engagement member while rotating from the position to the forward protruding position.