JPS6331651Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a chair armrest height adjustment device.

(Prior Art) Conventionally, there has been no chair equipped with an armrest that allows the height of the armrest to be changed.
Even when people of various physiques sit on the seat, the height from the seat remains constant at an average height, making it difficult for some people to achieve the best posture.

(Purpose of the invention) The present invention provides a chair armrest height adjustment device that improves the above-described conventional chair armrest mounting structure and allows the armrest height to be changed to multiple levels with a simple operation. The purpose is to

(Structure of the invention) In order to achieve the above object, the present invention includes a plate-shaped bracket that stands upright with its lower end connected to a seat, and a movable bracket on the plate-shaped bracket that is spaced at a predetermined interval along the moving direction. a plurality of concave grooves provided in the plate-shaped bracket; a fixed bracket fixed to the armrest and fitted to the plate-shaped bracket so as to be vertically slidable; and a fixed bracket rotatable about an axis on the fixed bracket. A rotating arm that is attached and has an engaging portion at one end that engages with the movable bracket and a claw portion that connects to the groove at the other end, and engagement between the claw portion of the rotating arm and the groove. A movable bracket is supported to be vertically slidable relative to the fixed bracket so as to be detachable, and the movable bracket is biased in a direction in which the claw portion of the rotating arm fits into the groove of the plate-shaped bracket. The handle includes a spring, and a handle that is linked to the movable bracket to rotate the rotating arm and to operate the height movement of the armrest when the claw portion is removed from the groove. .

(Function) With this configuration, when the movable bracket is pulled against the tension of the spring via the handle provided on the outside of the armrest, the claw of the rotating lever that is linked to the movable bracket will move from the plate-shaped bracket. Since the armrest is separated from the groove, the armrest becomes movable relative to the plate-shaped bracket, that is, to the seat side. Therefore, the armrest can be moved up and down, stopped at an arbitrary height, and the handle can be released to obtain a locked state.

(Example) Next, an example of the present invention will be described with reference to the drawings.

First, Figure 1 shows a chair to which the present invention is applied.
1 is a leg, 2 is a seat that is rotatable with respect to the leg 1 and can be adjusted in height as necessary, 3 is a backrest attached to the rear of the seat 2, and 4 is a plate. This is an armrest that is supported by a bracket 5 in a height-adjustable manner by a structure that will be described later.

Next, referring to FIG. 2 and FIG. 3 showing a cross section along the - line of FIG.
Explain the height adjustment mechanism. In Figure 2,
A fixed bracket 6 is fixed to the armrest base plate 8 with screws 7, and guides the plate-shaped bracket 5 from both sides so as to be slidable in the vertical direction. A plate-shaped bracket 5 connected to the seat portion is provided with three grooves 9 on each side, and for one set of grooves 9, a roughly L-shaped bracket is pivoted at the intermediate portion by a shaft 10. A claw portion 12 formed at one end of a rotating arm 11 having a shape is fitted into the rotating arm 11.

A movable bracket 13 is placed on the fixed bracket 6 at a position on the near side in FIG. 2, and this movable bracket 13 is supported by a protrusion 14 provided on the fixed bracket 6 so as to be able to slide up and down, and is not allowed to fall off. Efforts are being made to prevent this. A part of the movable bracket 13 is bent by 90 degrees toward the armrest board 8, and a hole 15 provided in this part engages with the other end of the rotating arm 11 (the end opposite to the claw part 12). are doing. A spring 16 is installed between the fixed bracket 6 and the movable bracket 13, and urges the movable bracket 13 to move downward in the figure. Due to this bias, the rotating arm 11 is rotated around the shaft 10 in a direction in which its claw portion 12 fits into the groove 9 of the plate-shaped bracket 5.

In this armrest height adjusting device configured as described above, in order to adjust the height of the armrest 4, the handle 17 (see FIGS. 1 and 2), which spans between the left and right movable brackets 13, 13, is used. When the movable bracket 13 is pulled upward against the tension of the spring 16, the claw portion 12 of the rotating arm 11 is rotated in the direction of detaching from the groove 9 of the plate-shaped bracket 5 as the movable bracket 13 moves. Therefore, after detachment, move the armrest 4 upward or downward relative to the plate-shaped bracket 5, adjust the height of the armrest, and then remove the pulling force on the handle 17. It returns to its original position by force and fits into the groove 9 located there to maintain the adjusted position.

(Effects of the invention) Since the invention is constructed as explained above, it is possible to adjust the height to any desired height by simply pulling the handle and moving the armrest up and down, making it comfortable to sit on. effective.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention in use, Fig. 2 is a partially cutaway front view of the embodiment, and Fig. 3 is a sectional view taken along the - line in Fig. 2. be. 4...Armrest, 5...Plate bracket,
6...Fixed bracket, 9...Concave groove, 11...Rotating arm, 12...Claw portion, 13...Moving bracket, 16...Spring.

Claims (1)

[Scope of utility model registration request] a plate-shaped bracket that stands upright with its lower end connected to the seat; a plurality of grooves provided in the plate-shaped bracket at predetermined intervals along the moving direction of the movable bracket on the plate-shaped bracket; a fixed bracket fixed to the armrest and fitted to the plate-shaped bracket so as to be slidable up and down; and an engagement member attached to the fixed bracket so as to be rotatable about an axis and engaged with the movable bracket at one end thereof. and a rotating arm having a claw portion at the other end that engages with the groove; a slidably supported movable bracket;
a spring that biases the movable bracket in a direction in which the claw portion of the rotary arm fits into the groove of the plate-shaped bracket; and a spring that is linked to the movable bracket and rotates the rotary arm, An armrest height adjustment device for a chair, comprising a handle for operating the height movement of the armrest when the claw part is detached.