JPH0739611U - Armrest device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide an armrest device capable of steplessly adjusting the position / angle to any position. [Structure] The stationary cylinder 19 is fixed to a seat frame, and the rotating cylinder is rotatably fitted into a small diameter portion 19b of the stationary cylinder 19. The coiled spring 24 is incorporated so as to straddle the outer peripheral surfaces of the stationary-side cylindrical body 19 and the rotating-side cylindrical body.
One end of the coiled spring 24 is fixed to the armrest frame 1 and the other end is attached to the link 3 to fix the shaft lock mechanism R.
To form. The link 3 is provided with a guide groove 4, a collar 7, and a rod-shaped portion in which a locking hole 18 for the coil spring 24 is formed.
A cam plate is provided in the vicinity of the lock mechanism to guide the collar 7, and the collar 7 is disengaged at the lowest use position to lock the shaft lock mechanism. A stopper 13 is provided on the cam plate to allow the rod-shaped portion 6 to move when the armrest A is stored.
And the link 3 is displaced to make it lock-free.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an armrest device for a vehicle seat, which can adjust the position and angle of the armrest to any position without any operation lever.

[0002]

[Prior art]

 A coil-shaped spring is provided so as to straddle the outer peripheral surface of the fixed-side cylinder provided on the seat frame and the rotating-side cylinder attached to the armrest frame. Various armrests have been devised, which are in close contact with the outer peripheral surface of the body and have a shaft locking mechanism in which one free end of a coiled spring is fixed to an armrest frame and the other end is attached to a link mechanism. With these shaft lock devices, it is necessary to expand the inner diameter of the spring when releasing the shaft lock state.

In an armrest mechanism using such an axis lock device, a link mechanism is arranged on the armrest frame, one end is connected to a spring terminal and the other end is connected to an operating lever, and the operating lever is operated. , The spring end is pulled to expand the inner diameter of the spring (see, for example, Japanese Utility Model Publication No. 62-11454, Japanese Utility Model Publication No. 62-22132, Japanese Utility Model Publication No. 62-22133, etc.). .

[0004]

[Problems to be solved by the device]

 Since the conventional armrest mechanism has the above-mentioned structure, it requires many parts such as the operating mechanism and the pins in addition to the lock mechanism, the link, the armrest frame, and thus the structure is complicated and the operation is difficult. However, there is a problem that the price is high in addition to being troublesome.

[0005]

Means for Solving the Problems The present invention has been made to solve the problems, and has a large diameter portion and a small diameter portion continuous with the large diameter portion, and is fixed to a seat frame. The side cylindrical body, the rotating side cylindrical body fixed to the armrest frame and rotatably fitted in the small diameter portion of the fixed side cylindrical body, and straddling the outer peripheral surfaces of the fixed side cylindrical body and the rotating side cylindrical body. A coil-shaped spring that has an inner diameter that is in close contact with the outer peripheral surfaces of the fixed-side cylindrical body and the rotating-side cylindrical body in an enclosed state, and one end of the coil-shaped spring is fixed to the armrest frame and the other end is a link. An armrest device having an attached shaft lock mechanism, wherein a guide groove for engaging a pin provided on an armrest frame is provided at one end of the link, a collar is provided at the center portion, and a coiled spring engagement member is provided at the other end. Forming a blind hole A rod-shaped part is provided to guide the collar from the retracted state of the armrest frame to just before entering the lowest use position, and at the lowest use position, the collar disengages to lock the shaft lock mechanism. The cam plate is provided with a cam surface for locking and a stopper for locking the lock by displacing the link by contacting the rod-shaped portion when the armrest is stored.

[0006]

[Action]

 When the armrest is rotated counterclockwise, the coil spring receives a tightening force that locks the coil spring, and when the armrest is rotated clockwise, a rewind force acts to lock it. It becomes the state of. Therefore, if the armrest is turned counterclockwise and tilted, it is locked at an arbitrary angle, and the armrest can be stopped at any position and used steplessly.

[0007]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a side surface of the armrest A in an assembled state. As is clear from FIG. 6, the armrest frame 1 is formed into a box shape by bending the periphery 1a, and a mating member (not shown) having a substantially identical shape is fitted into the armrest frame 1 to form the armrest A. To do. The armrest A is stored in the seat back S in a state as shown in FIG. 3 when not in use, and rotates about the central axis O as shown by an arrow Y with respect to the axis 2a of the seat frame 2 shown in FIG. Is able to. Then, the armrest is tilted from the retracted state to enter the use state.

A link 3 as shown in FIG. 5 is arranged on the armrest frame 1. A guide groove 4 for guiding the movement of the link 3 is bored at one end of the link 3, and a spring locking hole 18 for attaching one end of a coiled spring 24 constituting a shaft locking mechanism described later to the other end. To form the rod-shaped portion 6. Further, the link 3 is provided with a rotatable collar 7 at a central portion 8 projecting from the guide groove 4 and the rod-shaped portion 6 to the front side with respect to the paper surface of FIG.

A hook-shaped lock portion 9 is provided adjacent to the guide groove 4, and the lock portion 9 is engageable with a locking portion 10 formed at the tip of the link 3. Further, a pin 5 is erected on the armrest frame 1 and is located in the guide groove 4 of the link 3 to restrict the movement of the link 3.

Within the armrest frame 1, there is located a cam plate 11 provided with an arcuate cam surface 12 and a stopper 13 formed at a position facing the cam surface 12 with a central axis O therebetween. The cam plate 11 is fixed to the seat frame 2 side and is provided integrally with the armrest frame 1 so that its position changes relative to a member that is displaced as the armrest frame 1 rotates. Reference numerals 16a and 16b denote a pair of circular arc grooves formed near the center of the cam plate 11, and the projecting ends 17a and 17b provided on the end surface of the stationary side cylindrical body 19 are inserted into the circular arc grooves 16a and 16b. Fixed. Therefore, the shaft lock mechanism R is positioned.

The shaft lock mechanism described above has a structure similar to that used in the conventional armrest device. That is, as shown in FIG. 2 and the perspective view of FIG. 6 in which the central portion of the cam plate 11 is cut away, the square tip 22 of the fixed-side cylindrical body 19 is inserted into the square mounting hole 21 provided in the seat frame 2. It is installed and fixed. The fixed-side cylindrical body 19 has a large diameter portion 19a and a small diameter portion 19b. A rotating-side cylindrical body 23 fixed to a plate 20 attached to the arm rest frame 1 by means such as welding is rotatably fitted into the small-diameter portion 19b. The outer diameter surface of the rotating-side cylindrical body 23 has the same outer diameter as the outer diameter of the large-diameter portion 19a of the fixed-side cylindrical body 19. Thus, the armrest frame 1 can be tilted with respect to the fixed-side cylindrical body 2.

Further, a coil-shaped spring 24 is incorporated so as to straddle the outer peripheral surfaces of the fixed-side cylindrical body 19 and the rotating-side cylindrical body 23. The inner diameter surface of the coiled spring 24 is in close contact with the outer peripheral surfaces of the stationary side cylindrical body 19 and the rotating side cylindrical body 23 in the free state. Further, one end 24a of the coil-shaped spring 24 is attached to a fixing portion 25 provided on the plate 20, and a substantially L-shaped bent portion of the other end 24b is inserted into a spring locking hole 18 provided in the link 3. It is locked by. Further, the cam plate 11 is located on the end face 24c side of the coil-shaped spring 24 incorporated as described above. In this way, the shaft lock mechanism R is configured.

In the present embodiment, when the armrest A is rotated counterclockwise, the coil-shaped spring 24 is locked by the coiling spring 24, and the armrest A is rotated clockwise. When it is turned, the rewinding force acts and the lock-free state is reached. In other words, if the armrest A is turned counterclockwise, the armrest A is locked at an arbitrary angle, and the armrest A can be stopped at an arbitrary position and used continuously.

When the armrest A is rotated clockwise to the retracted state shown in FIG. 3, the collar 7 provided on the link 3 moves while being guided by the cam surface 12, and the end 6 a of the rod-shaped portion 6 is moved to the cam plate 11. The link 3 is displaced from the position 3a to the position 3b in order to come into contact with the stopper 13 of the above, but the engaging portion 10 provided at the tip of the link 3 is engaged with the hook of the locking portion 9. Displacement is restrained. At the same time, the position of the end 24b of the coiled spring 24 is displaced from the position of 24b 'to 24b "to increase the inner diameter of the coiled spring 24. Therefore, even if the armrest A rotates counterclockwise, It is in the state of free.

In the storage state described above, the locking portion 10 provided at the tip of the link 3 is locked by the hook of the lock portion 9 and the displacement is restrained as described above. Since 7 is in contact with the cam surface 12 of the cam plate 11, the end 24b of the coiled spring 24 maintains the lock-free state until it reaches the lowest use state position shown in FIG.

When the armrest A is tilted to the lowest use state position shown in FIG. 4, the collar 7 provided on the link 3 is removed from the cam surface 12 formed on the cam plate 11 from the state of 7a and 7a. From the position of 7 to the position of 7b, the locking portion 10 at the tip of the link 3 is released from the locked state of the lock portion 9, and the link 3 is displaced to the position shown by the solid line. For this reason, the end 24b of the coiled spring 24 returns from the position 24b "to the position 24 ', and becomes the locked state and the initial state.

[0017]

[Effect of device]

 As described above, this invention is a rod-shaped part having a guide groove engaging with a pin provided on an armrest frame at one end of the link mechanism, a collar at the center, and a mounting hole for a coiled spring at the other end. , And a cam plate with a circular cam and a stopper are attached to the side end of the shaft locking mechanism, and the collar can be guided along the arcuate cam surface. Since the collar is guided to the position immediately before entering the lowermost use position, the collar can be detached from the circular cam portion at the lowest use position. The armrest can be adjusted steplessly at any position without requiring an operating lever. Moreover, since the operation lever is not required, it is not necessary to handle the operation lever, and the operation becomes easy. Moreover, since the structure is simple, the number of parts is small and an inexpensive armrest device can be provided.

[Brief description of drawings]

FIG. 1 is a side view of an assembled state of an embodiment of the present invention.

FIG. 2 is a side view of FIG. 1 in which a central portion of a cam plate is removed.

FIG. 3 is a side view of the embodiment shown in FIG. 2 showing a stored state.

4 is a side view of the embodiment of FIG. 2 in the lowest position.

FIG. 5 is a perspective view of a link used in this embodiment.

FIG. 6 is a perspective view of an essential part of an embodiment of the present invention.

[Explanation of symbols]

 1 armrest frame 2 seat frame 3 link 4 guide groove 5 pin 6 rod-shaped portion 7 collar 11 cam plate 12 cam surface 13 stopper 18 spring locking hole 19 fixed side cylindrical body 19a large diameter portion 19b small diameter portion 23 rotating side cylindrical portion 24 coil Shaped spring 25 Fixed part A Armrest O Central axis R axis Lock mechanism

Claims (1)

[Scope of utility model registration request] 1. A fixed-side cylindrical body having a large-diameter portion and a small-diameter portion continuous with the large-diameter portion and fixed to a seat frame, and a small-diameter portion of the fixed-side cylindrical body fixed to an armrest frame. The rotation-side cylinder that is fitted in, and the outer circumference of the fixed-side cylinder and the rotation-side cylinder are surrounded, and the inner diameter that is in close contact with the outer surfaces of the fixed-side cylinder and the rotation-side cylinder is set in a free state. An armrest device comprising a coiled spring and an axial locking mechanism in which one end of the coiled spring is fixed to an armrest frame and the other end is attached to a link, wherein one end of the link is provided on the armrest frame. There is a guide groove that engages with the pin, a collar is provided at the center, and a rod-shaped part with a locking hole for the coiled spring is provided at the other end. The guide guides the collar until just before entering the use position, and at the lowest use position, the collar separates from the cam surface to lock the shaft lock mechanism, and the armrest comes into contact with the rod-shaped portion to link. An armrest device comprising a cam plate provided with a stopper for displacing the lock to make it lock-free.