JP3047610U - Movable armrest for office chair - Google Patents

Abstract

(57) [Summary] [Problem] To provide a movable armrest for an office chair. SOLUTION: One guide rail is fixed to an upper end of an armrest of a chair, and an inverted U-shaped slide sheet slidable therein is provided, and stop plates for locking to the slide seat are provided before and after the guide rail. Provided, a seat plate is provided with a shaft at the front end of the slide sheet, a perforation is provided in the center of the seat plate, the trapezoid is connected by a convex column on the bottom surface, and is rotatable around the convex column, and the pad Downwardly symmetrical parallel plates are provided on both sides of the bottom plate middle part, fitted on the trapezoid, connected to both sides of the seat plate with screws, the pad rotates up and down with the operation of the trapezoid, and moves back and forth with the seat plate The slide and horizontal rotation were made possible.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a type of office chair movable armrest.

[0002]

[Prior art]

 Generally, office chairs have fixed armrests. Such an armrest can provide support for the lower arm when the user does not place anything between his or her hands, but does provide any support when the user extends the lower arm to the desk when working at the desk. The effect could not be provided, resulting in fatigue of the user's arm. Therefore, the support effect of the conventional office chair armrest is limited.

[0003]

[Problems to be solved by the invention]

 The present invention supports the lower arm of the user, can slide back and forth arbitrarily, rotate up and down and rotate horizontally as the lower arm moves, and support the lower arm when the user performs writing or computer operation It is an object of the present invention to provide a kind of movable armrest for an office chair, which can prevent fatigue of a user's arm.

[0004]

[Means for Solving the Problems]

 The invention of claim 1 is that one guide rail 2 is fixed to the upper end of the armrest of the chair and has a U-shaped cross section, and one slide seat 3 is formed in the guide rail 2. A sliding plate which is provided slidably, is horizontally extended on both sides of the bottom end of the rear part, and is fitted with a rubber strip, and has one circular hole 32 at the front end; 4 and a long strip-shaped plate body, the front end of which is connected to the circular hole 32 of the slide sheet 3 by the shaft 321 and the bearing 322, and is placed over the slide sheet 3 to be able to rotate 360 degrees horizontally. One through hole is provided in the center, and a convex pillar on the bottom surface of one trapezoid is inserted into the through hole so that the trapezoid is rotatable. One is a bottom plate, A plate placed on the bottom of the pad where the user's arm contacts Then, two parallel plates 511 extending downward are provided on both sides of the middle portion, and the parallel plates 511 are fitted on a trapezoid, and are connected to the side surface of the seat plate 4 so as to be rotatable and rotate up and down. Combination of the above, combined with the above, enables the handrest pad to slide back and forth, rotate horizontally and up and down, and can support the lower arm of the user who performs writing and computer operations. The office chair consists of a movable armrest.

According to a second aspect of the present invention, the front and rear ends of the guide rail 2 are each extended upward to provide a stopper plate, wherein a rubber stopper is further fitted to the front stopper plate, and an upper surface of the rubber stopper is provided. 2. The movable armrest of the office chair according to claim 1, wherein two ridges are protruded from the armrest.

According to a third aspect of the present invention, inwardly projecting convex points are provided on both sides of the front end of the slide sheet 3, and the convex points come into contact with a rubber stopper to form a positioning action. A movable armrest of the office chair according to the first or second aspect.

[0007] The invention according to claim 4 is that one screw hole is formed in the middle portion of the slide sheet 3, and the screw is screwed from above to project from below, and when the slide sheet slides forward, the screw is screwed. The movable armrest of the office chair according to claim 1, wherein the armrest abuts on a rubber stopper of the guide rail 2.

In the invention of claim 5, one concave point is provided on the upper surface of the rear part of the slide sheet 3, and a screw hole corresponding to the concave point is separately provided in the rear part of the seat plate 4. 2. The screw rod as claimed in claim 1, wherein a screw rod is screwed into the screw member from above and protrudes from below, and a point of the screw rod is fitted with the concave point to form a positioning action. The office chair has a movable armrest.

According to a sixth aspect of the present invention, there is provided a movable armrest for an office chair according to the fifth aspect, wherein the tip end of the screw rod has an arc shape.

[0010] In the invention of claim 7, a bellows shield is provided around the trapezoid, between the bottom plate and the seat plate to prevent fingers from entering during use of the movable hand rest. It is a movable armrest of the office chair described in.

[0011]

[Embodiment of the invention]

 The movable armrest of the office chair of the present invention is an armrest which can be moved back and forth and can be rotated horizontally, and one guide rail is fixed to the upper end of the armrest of the chair, and the inverted U-shaped slide seat which can slide inside the armrest. A stopper plate is provided before and after the guide rail for locking the slide sheet, a seat plate is provided at the front end of the slide sheet by a shaft, a perforation is provided in the center of the seat plate, and the trapezoid body has a bottom surface. Are connected to each other by a pair of convex pillars and are rotatable about the convex pillars.A downwardly symmetrical parallel plate is provided on both sides of the middle part of the bottom plate of the pad, fitted on a trapezoidal body, and screwed on both sides of the seat plate The pad rotates up and down in accordance with the movement of the trapezoidal body, and can slide back and forth and horizontally with the seat plate so that the user who performs writing and computer operations can support the lower arm. Are you.

[0012]

【Example】

 As shown in FIGS. 1 and 2, in the present invention, one long guide rail 2 is provided at the upper end of the armrest 1, and stop plates 21 and 22 are provided before and after the guide rail 2. A rubber stopper 23 is further mounted on the front stopper plate 21, and two symmetrical vertical ridges 231 are provided on the upper surface of the rubber stopper 23. A slide sheet 3 having an inverted U-shaped cross section is fitted into the guide rail 2 (see also FIG. 3 at the same time), and a horizontal stretch plate 31 is provided at the bottom end of the rear end of the slide sheet 3. One rubber strip 311 is fitted on the stretching plate 31 to increase the resistance force of the slide sheet 3 when sliding in the guide rail 2, thereby preventing any sliding. A convex point 35 is provided on each side of the front end of the slide sheet 3 so as to project inward, and the convex point 35 abuts against the rubber stopper 23 to form a locking action (see FIG. 4). As a result, the slide sheet 3 is prevented from arbitrarily escaping and can be escaping by applying a slight force. In addition, one circular hole 32, a screw hole 33, and a concave point 34 are respectively provided at appropriate positions on the front end, the middle step, and the rear end of the upper surface of the slide sheet 3, and the screw hole 33 in the middle step faces downward. When the slide sheet 3 slides forward, the screw 331 abuts against the rubber stopper 23 to form a position limiting action, so that the slide sheet 3 escapes forward. Thus, the guide rail 2 is prevented from coming off. One seat plate 4 is attached to the circular hole 32 at the front end of the slide sheet 3 using a shaft 321 and a bearing 322, and the seat plate 4 is placed above the slide sheet 3 so that it can freely rotate. Has been done. A screw hole 41 corresponding to the concave point 34 of the slide seat 3 is provided at a stage subsequent to the seat plate 4, and one screw rod 411 is passed downward from the top and protrudes downward, and the tip of the screw rod 411 has an arc shape. The positioning action is formed by fitting into the protruding point 34. When the seat plate 4 rotates, the positioning operation is performed to perform the recovery positioning. If a slight force is applied, the seat plate 4 is rotated again. It is made to be able to be done. One through hole 42 is provided in the center portion of the seat plate 4, and a convex pillar 431 on the bottom surface of one trapezoidal body 43 is inserted into the through hole 42 (see FIG. 4), and the bottom end of the convex pillar 431 is The trapezoidal body 43 is rotatable about the convex column 431 and is used for fixing two parallel plates 511 extending downward on both sides of the middle portion of the bottom plate 51 of the pad 5. The parallel plate 511 is fitted to the trapezoidal body 43, and the shaft ends 512, 44 corresponding to the bottom ends of the two parallel plates 511 and the side surfaces of the seat plate 4 are provided and connected by screws 441, so that the bottom plate 51 is formed. It is rotatable up and down around the screw 441. After the completion of the combination, as shown in FIG. 4, the slide sheet 3 can be slid forward and backward in the guide rail 2 (see FIG. 5), the seat plate 4 can be rotated horizontally by 360 degrees (see FIG. 6), and the pad 5 Can be rotated up and down (see FIG. 7), and when the user places the lower arm on the pad 5, the pad 5 can be slid, horizontally rotated and vertically rotated by the activity of the lower arm of the user. In other words, no matter where the lower arm moves, it can be supported at an appropriate angle. Thus, the present invention provides an innovative effect not found in the armrest of a well-known office chair.

Further, in the structure of the present invention, the vertical ridge 231 protruding from the upper surface of the rubber stopper 23 and the rubber ridge 311, the trapezoidal body 43 and the bearing 322 on the stretched plate 31 slide on the slide sheet 3. It provides a slight resistance to the rotation of the pad 5 and the rotation of the seat plate 4 to prevent each part from generating a large impact during exercise and not to pinch a hand or arm.

In addition, a bellows-like shield 45 is provided between the outer periphery of the trapezoidal body 43 and the bottom plate 51 and the seat plate 4 (see FIG. 2), and protrusions 451 are provided on both sides of the shield 45, respectively. One positioning hole 452 is provided at the bottom end of the protruding portion 451, the positioning hole 452 is made to correspond to the shaft hole 44 of the seat plate 4, and the shield 45 is placed on the seat plate 4 with the screw 441. By being fixed, it is possible to prevent an accident in which a finger is caught between the bottom plate 51 and the seat plate 4 during use of the armrest and injured.

[0015]

[Effect of the invention]

 The movable armrest of the office chair of the present invention supports the lower arm of the user, and can slide back and forth, rotate up and down, and rotate horizontally as the lower arm moves. The lower arm can be supported when performing an operation, and fatigue of the user's arm can be prevented.

[Brief description of the drawings]

FIG. 1 is a view showing the implementation of the present invention and the entire chair.

FIG. 2 is an exploded perspective view of the present invention.

FIG. 3 is a combined perspective view of the present invention.

FIG. 4 is a view showing a combination structure of the present invention.

FIG. 5 is a first operation display diagram of the present invention.

FIG. 6 is a second operation display diagram of the present invention.

FIG. 7 is a third operation display diagram of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 armrest 2 guide rail 21, 22 stopper plate 23 rubber stopper 231 vertical ridge 3 slide sheet 31 stretch plate 311 rubber ridge 35 convex point 32 circular hole 33 screw hole 34 concave point 331 screw 321 shaft 322 bearing 4 seat plate 41 screw Hole 411 Screw rod 42 Through-hole 43 Trapezoid 431 Convex column 5 Pad 51 Bottom plate 511 Parallel plate 512 Shaft hole 44 Shaft hole 441 Screw 45 Shield 451 Projection 452 Positioning hole

Claims (7)

[Utility model registration claims] 1. One guide rail 2, which is fixed to the upper end of an armrest of a chair and has a U-shaped cross section, and one slide seat 3, which is slidable into the guide rail 2. A stretched plate 3 which is provided and stretched horizontally on both sides of the bottom end of the rear part and fitted with rubber strips
1 and one with a circular hole 32 at the front end, and one as a seat plate 4 to form an elongated plate, and the front end has a shaft 321 and a bearing 322 to form a circle of the slide sheet 3. Hole 32
And is placed on top of the slide sheet 3
One in which a through hole is provided in the center, and a convex pillar on the bottom surface of one trapezoid is inserted into the through hole so that the trapezoid is rotatable; The bottom plate is a plate that is placed on the bottom surface of the pad with which the user's arm abuts, and two parallel plates 511 that extend downward are provided on both sides of the middle portion thereof. It is fitted on the form, and is rotatably connected to the side surface of the seat plate 4 so as to be rotatable up and down. In combination with the above, the pad of the hand rest can be slid forward and backward, horizontally and vertically rotatable. The movable armrest of the office chair, which can support the lower arm of a user who performs writing and computer operations, and has the above configuration. 2. A stopper plate is provided by extending the front and rear ends of the guide rail 2 upward, and a rubber stopper is further fitted on the front stopper plate, and two convex portions are provided on the upper surface of the rubber stopper. The movable armrest of the office chair according to claim 1, wherein the ridge is provided in a protruding manner. 3. The slide sheet 3 according to claim 1, wherein a convex point protruding inward is provided on each side of the front end of the slide sheet, and the convex point abuts against a rubber stopper to form a positioning action. The movable armrest of the office chair according to 1. 4. A screw hole is formed in a middle portion of the slide sheet 3, and a screw is screwed from above to project from below, and when the slide sheet slides forward, the screw becomes a rubber of the guide rail 2. The movable armrest of an office chair according to claim 1, wherein the movable armrest is adapted to abut a stopper. 5. A concave point is provided on the upper surface of a rear part of the slide sheet 3, a screw hole corresponding to the concave point is separately provided on a rear part of the seat plate 4, and one screw rod is provided from above to below. The movable armrest of an office chair according to claim 1, wherein the screw arm is screwed into the screw member and protrudes from below, and a pointed end of the screw rod is fitted with the concave point to form a positioning action. . 6. The movable armrest of an office chair according to claim 5, wherein the tip of the screw rod has an arc shape. 7. The office chair according to claim 1, wherein a bellows shield is provided around the trapezoid, between the bottom plate and the seat plate to prevent fingers from entering during use of the movable hand rest. Movable armrest.