JPH0449962Y2 - - Google Patents

Description

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

[Prior art]

Conventionally, this type of position adjustment mechanism has been known to be equipped with a spring coupler, but since the structure of this spring coupler is complicated, the position adjustment mechanism inevitably has a complicated structure, and it is difficult to adjust the position of the armrest and seat back. The assembly becomes complicated. In order to deal with this, the present applicant filed a patent application filed in 1983-
In application No. 81887 (Japanese Unexamined Patent Publication No. 64-40756), the following position adjustment mechanism was filed. That is, the position adjustment mechanism has a right-hand threaded part and a left-hand threaded part at a predetermined interval on the outer periphery, and a fixed shaft that is fixed to the seat back and protrudes to one side of the back and rotatably supports the armrest, and this fixed shaft. a first nut member that is reciprocably screwed into the threaded portion of either one of the shafts and fixed to the armrest;
The main component is a second nut member that can come into contact with and separate from the nut member, and the second nut member
By rotating the nut member, the first
The inclination angle of the armrest is adjusted by an amount of rotation corresponding to the distance from the nut member.

[The problem that the idea aims to solve]

The purpose of the present invention is to provide an armrest equipped with a position adjustment mechanism of the above-mentioned type according to the applicant's earlier application, so that the armrest can be brought into a usable state at any time from a stored state, and then adjusted to a desired inclination angle steplessly. The purpose is to improve usability by having an adjustable configuration.

[Means to solve the problem]

The armrest position adjustment mechanism according to the present invention has a right-hand threaded part and a left-hand threaded part at a predetermined interval on the outer periphery, and is fixed to a seat bag and protrudes from one side of the bag to rotatably support the armrest. a first nut member which is screwed into the threaded portion of one of the fixed shafts so as to be retractable and which is fixed to the armrest; a second nut member capable of contacting and separating from the first nut member; a locking means for locking the armrest with respect to the fixed shaft in the retracted position; a spring means that constantly applies a torque to move the nut member forward; and a spring means that is connected to the locking means and the second nut member and acts to release the lock on the locking means when operated, and also moves the second nut member back and forth. It is characterized by comprising an operating means that selectively allows rotation in the direction.

[Functions and effects of the idea]

In the position adjustment mechanism configured as described above, when the operating means is not operated, the armrest is locked to the fixed shaft by the locking means and is in the retracted position, and the second nut member is rotated by the action of both the spring means and the operating means. regulated. When the operating means is operated in this state, the lock on the fixed shaft of the armrest is released and the armrest can be rotated, and at the same time, the second nut member is released from the restriction by the operating means and moves forward a predetermined amount by the action of the spring means. Rotate. Further, as the armrest rotates, the first nut member integrated therewith rotates a predetermined amount in the forward direction,
It comes into contact with the second nut member to restrict further rotation of the armrest. Thereby, the armrest can be changed from the stored state to the used state at any time, and when the second nut member is then rotated toward the rearward side against the action of the spring means by operating the operating means, the second nut member is separated from the first nut member according to the amount of rotation, and the armrest is moved away from the first nut member.
The inclination angle can be adjusted by further rotating the nut member until it abuts the second nut member.

To store the armrest, the armrest is rotated toward the storage side with the operating means for the second nut member released. As a result, the first nut member rotates toward the backward side, and the second nut member rotates toward the forward side due to the action of the spring means.
The locking means locks the rotated armrest onto the fixed shaft, and the second nut member rotates back to its original position.

As described above, with this position adjustment mechanism, the armrest can be brought into use from the stored state at any time, and the armrest can then be adjusted to a desired inclination angle.
The armrest is extremely easy to use.

〔Example〕

An embodiment of the present invention will be described below based on the drawings. Figs. 1 and 2 show a position adjustment mechanism according to an embodiment of the invention, and Fig. 4 shows the adjustment mechanism. It is incorporated into the armrest 10a shown, and the armrest 10a is supported on one side of a seat back 10b of a vehicle seat.

The armrest frame that constitutes the armrest 10a includes a pair of left and right side plates 11 and 12, and both side plates 1.
It consists of an intermediate reinforcement 13 that connects 1 and 12 at a predetermined interval, and a bracket 14, the outer periphery of which is covered with a cushion pad 15.

As shown in FIGS. 1 to 3, the adjustment mechanism 20 includes a fixed shaft 21 and a pair of left and right nut members 22a, 22b.
The fixed shaft 21 has a cylindrical shape and has a right-hand threaded part 21a and a left-hand threaded part 21b at a predetermined interval on its outer periphery, and the first nut member 22a can move forward and backward into the right-hand threaded part 21a. At the same time, a second nut member 22b is screwed into the left-hand threaded portion 21b so as to be movable forward and backward. The first nut member 22a is fixed to the reinforcing plate 15 fixed to the outside of the right side plate 11 of the armrest frame, and the fixing shaft 21 is inserted into the inner hole 21c of the reinforcing plate 22a by a bolt 23 screwed into the frame (not shown) of the seat bag 10b. fixed to the same frame. As a result, the fixed shaft 21
is attached to the armrest 1 via the first nut member 22a.
0a is rotatably supported in the front-back direction. Each nut member 22a, 22b is connected to an arrow A shown in FIG.
If it rotates in the direction of B, and rotates in the direction of arrow A, it will move forward in the opposite direction and come into contact with each other, and if it rotates in the direction of arrow A,
If it rotates in the direction, it will move backward and separate.

The adjustment mechanism 20 includes a locking means for locking the armrest frame to the fixed shaft 21, a spring means for applying torque to the second nut member 22b, and an operating means. The lock means includes a lock plate 24 fixed to a fixed shaft 21 and located on the outside of the right side plate 11, and a lock hook 25 rotatably assembled to the bracket 14. The hook 25 is pushed by the biasing force of the spring spring 26a.
is elastically engaged with the engagement groove 24a of the lock plate 24. A first cable 27a constituting an operating means is connected to the lock hook 25.
On the other hand, a bracket 22c is welded to the outer surface of the second nut member 22b.
A tension spring 26b is installed between c and the side plate 12.
is latched. A second cable 27b constituting an operating means is connected to the bracket 22c.

The operating means is the pair of cables 27a, 2 described above.
7b and an operating lever 28, and the operating lever 28 is supported by the side plate 11 via a support pin 28a so as to be rotatable in the vertical direction. A bracket 28b is welded to this operating lever 28, a first cable 27a is connected to the upper end of the bracket 28, and a second cable 27a is connected to the lower end of the bracket 28b.
b are connected. The operating lever 28 is held at the neutral position N shown in FIG. 2 by the action of both tension springs 26a and 26b.

Armrest 10a equipped with the adjustment mechanism 20
As shown in FIG. 4, it can be rotated from the storage position shown by the two-dot chain line to the usage state shown by the solid line, and its inclination angle can be adjusted steplessly at the usage position. When the armrest 10a is in the retracted position, the lock hook 25 of the adjustment mechanism 20 engages with the engagement groove 24a of the lock plate 24 to lock the armrest frame to the fixed shaft 21, as shown in FIGS. The rotation of the second nut member 22b is restricted by the tension of the second cable 27b. Therefore, the armrest 10a is locked to the seat back 10b in the retracted position. Further, the operating lever 28 is in the neutral position.

When the operating lever 28 is rotated in the direction of arrow C in this state, the first cable 27a is stretched against the tension spring 26a, the lock hook 25 is rotated, and the engagement groove 2 of the lock plate 24 is rotated.
4a, and the second cable 27b is relaxed, releasing the restriction on rotation of the second nut member 22b. As a result, the second nut member 22b rotates by a predetermined amount in the direction of arrow A in FIGS. 1 and 2 under the action of the tension spring 26b, and moves forward toward the first nut member 22a, while the armrest 10a moves forward toward the first nut member 22a. The nut member 22a is rotated forward while rotating in the direction of the arrow A, and the first nut member 22a is rotated to the second nut member 22.
b, and its rotation is restricted. The armrest 10a in this state is shown by solid lines in FIG. In this state, the tip of the lock hook 25 elastically abuts on the outer peripheral edge 24b of the lock plate 24, and the armrest 10a and the fixed shaft 21
is in an unlocked state.

Next, when the operating lever 28 is rotated in the direction of arrow D in FIG. 2, the second cable 27b is stretched and the second nut member 22b is rotated in the direction of arrow B against the tension spring 26b. Therefore, the second nut member 22b is attached to the first nut member 22.
The armrest 10a is moved backward and separated from the nut member 22a and allowed to rotate in the direction of the arrow A, and the armrest 10a can be rotated by an amount corresponding to the distance between the nut members 22a and 22b.
The inclination angle of 0a can be adjusted. This angle of inclination can be adjusted arbitrarily depending on the amount of movement of the second nut member 22b. In addition, the armrest 10a
To store the armrest 10a, simply rotate the armrest 10a upward and backward. This results in
The lock hook 25 slides on the outer peripheral edge 24b of the lock plate 24, and when the armrest 10a reaches the storage position, the lock hook 25 slides on the outer peripheral edge 24b of the lock plate 24, and when the armrest 10a reaches the retracted position,
4a to fix the armrest 10a on the fixing shaft 2.
Lock to 1. Further, when the lock hook 25 engages with the engagement groove 24a of the lock plate 24, the operating lever 28 returns to the neutral position, and the second cable 2
7b and the action of the tension spring 26b, the second nut member 22b is rotated back to its original position.

FIG. 5 shows an adjustment mechanism 30 according to a second embodiment of the present invention. In the adjustment mechanism 30, the first
It is configured similarly to the adjustment mechanism 20 of the embodiment,
Identical components will be designated by similar reference numerals in the 30s and their descriptions will be omitted. The operating lever 38 is supported by the side plate 11 at its upper portion via a support pin 38a so as to be rotatable in the vertical direction, and a second cable 37b is connected to the lower bracket 38b. In addition, the operating lever 38
One end of the first link 39a is rotatably connected to the central portion of the first link 39a, and the other end is rotatably connected to the lower end of the second link 39b. Second link 39b
is attached to the side plate 1 via the support pin 39c at its center.
1 so as to be rotatable in the vertical direction, and a first cable 37a is connected to the upper end thereof. Therefore, in the adjustment mechanism 30, the first cable 37a can be extended via both links 39a, 39b, and the second cable 37b can be directly extended by the operation lever 38, and when the operation lever 38 is operated, The amount of rotation can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the adjustment mechanism according to the first embodiment of the present invention, Fig. 2 is a side view of the same mechanism with one side plate removed, and Fig. 3 is a fixed shaft and both nut members constituting the mechanism. FIG. 4 is a perspective view of a seat equipped with an armrest incorporating the same mechanism, and FIG. 5 is a side view of the adjustment mechanism according to the second embodiment, corresponding to FIG. 2. Explanation of symbols, 10a...Armrest, 11,
12... Side plate, 20, 30... Adjustment mechanism, 21,
31...Fixed shaft, 22a, 22b, 32a, 32
b... Nut member, 24, 34... Lock plate, 25, 35... Lock hook, 26a, 26
b, 36a, 36b... tension spring,
27a, 27b, 37a, 37b...cable,
28, 38...operation lever, 39a, 39b...
Link.

Claims (1)

[Scope of utility model registration request] A fixed shaft which has a right-hand threaded part and a left-hand threaded part at a predetermined interval on the outer periphery and is fixed to the seat bag and protrudes to one side of the bag to rotatably support the armrest, and one of the fixed shafts. a first nut member that is movably screwed into the threaded portion and fixed to the armrest; a first nut member that is movably screwed into the threaded portion of the other fixed shaft and abuts against the first nut member; a separable second nut member, a locking means for locking the armrest relative to the fixed shaft in the retracted position, and a constant torque applied to the second nut member to move it forward toward the first nut member. a spring means connected to the locking means and a second nut member, and an operation for releasing a lock on the locking means when operated, and selectively allowing rotation of the second nut member in forward and backward directions; An armrest position adjustment mechanism comprising means.