JP3004663U - Chair armrest - Google Patents

Abstract

(57) [Summary] [Purpose] The chair armrest can be moved and adjusted to the most ideal armrest position according to the posture of the seated person. [Structure] The lower end is fixed to an appropriate place on the side edge of the seat,
A support body provided with a fixing portion at its upper end portion extending substantially parallel to the seat side edge, a mortise groove provided at both end portions thereof, and a coupling body fixed to the upper surface of the fixing portion, and attached to the coupling body upper surface. An armrest main body is provided, and a ridge provided with a tenon that slidably fits with a tenon groove on both sides of the connecting body is provided on the lower surface of the armrest main body, and the armrest body is provided with the tenon and the tenon groove. A chair armrest that is slidable with respect to the connecting body and can be moved back and forth in the front and rear direction of the chair.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair armrest, and more particularly, to a chair armrest capable of moving and adjusting the position in the front-back direction of the chair according to the posture of the seated person.

[0002]

[Prior art]

 Incidentally, as shown in FIG. 6, a conventional chair in general is mainly for combining a seat 12 at the upper end of a leg frame 11 and a back 14 at the rear of the seat, and for convenience of use. Armrests 15 are attached to both sides of the seat 12, respectively. The armrest 15 includes a support plate 151 fixed to a side edge of the seat 12 and a main body 153 having a substantially rectangular frame body attached to the support plate through a fixing means such as a bolt 152. It is configured so that the occupant can rest his elbow on it.

[0003]

[Problems to be solved by the device]

 However, this type of conventional chair armrest 15 does not always provide the most ideal armrest position for different postures of the occupant. The cause is that the armrest 15 is "fixed". For example, when the occupant is leaning against the back 14 of the chair, the armrests 15 should certainly be able to perform their functions, but the occupant should lean forward (eg, operate a computer keyboard). In this state, the armrests 15 are fixed, so that in this state, the armrests 15 cannot move to the most ideal armrest position of the occupant, and often the occupants place their elbows on the armrests 15. In some cases, it may cause inconvenience in use.

In view of the above problems, the present invention has an object to provide a chair armrest that can be moved and adjusted to the most ideal position according to the posture of the seated person.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a support having a lower end fixed to an appropriate position on a side edge of a seat and a fixing part provided at an upper end extending substantially parallel to the side edge of the seat, and both ends thereof. The joint body is provided with a mortise groove and is fixed to the upper surface of the fixed portion, and the armrest main body is attached to the upper surface of the joint body.The lower surface of the armrest main body is slidable with the mortise grooves on both sides of the joint body. Each of the ridges is provided with a tenon that fits as much as possible, and the armrest main body slides with respect to the connecting body by the tenon and the tenon groove so that the armrest main body can move forward and backward in the front-back direction of the chair.

More preferably, the present invention is configured as follows. That is, (1) the fixing portion, the connecting body, and the armrest body are curved to have an appropriate curvature in a horizontal direction so as to surround the seat.

(2) One end in the longitudinal direction of the ridge on the lower surface of the armrest main body is formed as a closed end and the other end is formed as an open end, and a pawl made of an elastic plastic is provided near the open end, and the pawl is provided. Has a tapered surface toward the open end and a locking surface facing the closed end.

(3) The fixing portion is formed in a pipe shape, and the bottom surface of the connecting body is formed as a concave surface portion that engages with the pipe-shaped peripheral surface of the upper edge of the fixing portion.

(4) A plurality of holes are formed along the upper edge of the fixing portion, a plurality of through holes corresponding to the holes are formed in the connecting body, and a bolt with a screw is inserted from the through to the hole. The connection body is configured to be attached to the upper edge of the fixed portion by being inserted and screwed.

(5) A recessed hole in which a steel ball supported by a tension spring is loosely provided is provided in the upper end surface of the connecting body, and a portion of the lower surface of the armrest main body facing the upper end surface corresponds to the recessed hole. An appropriate number of locking recesses are provided in the armrest, and the armrest main body can be attached to a predetermined position by engagement between the steel ball and the locking recess.

[0011]

According to the present invention constructed as described above, the armrest main body attached to the upper surface of the connecting body is attached to the connecting body attached to the upper surface of the fixed portion at the upper end of the support body fixed to the seat side edge. Since the tenon joint is slidably fitted to the connecting body, the most suitable armrest position can be provided by moving the armrest main body in the chair front-rear direction according to the posture of the seated person.

[0012]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the chair armrest of the present invention comprises a support body 3, a connecting body 4 and an armrest body 5, which are paired and fixed to the left and right sides of the seat 21 of the chair 2.

The support 3 has its lower end fixed to an appropriate position on the side edge of the seat 21 and has its upper end extending substantially upwardly extending substantially parallel to the side edge of the seat 21 to surround the seat. As described above, the pipe-shaped fixing portion 31 which is curved with an appropriate curvature in the horizontal direction is provided, and the support body has a T-shape as a whole when viewed from the side of the seat. A plurality of mounting holes 311 are formed on the upper side surface of the fixed portion 31 along the pipe axis direction.

The connecting body 4 is an elongated plate body having an appropriate thickness, which is curved in the horizontal direction like the fixing portion 31 of the support body 3. The bottom surface of the connecting body is formed with a concave surface portion 41 corresponding to the upper side surface of the fixing portion 31 and contactingly engaged therewith, and a mortise groove 42 is provided on each side of the connecting body, and the upper surface portion of the connecting body is formed. Is formed on the flat surface 43. A through hole 44 corresponding to the hole 311 of the fixed portion 31 is provided on the flat surface 43, and the upper end portion of the through hole 44 is enlarged in diameter to form an engaging seat 441. By fixing a fixing means such as a bolt 45 through the through hole 44 and screwing the fixing means into the hole 311 of the fixing portion 31, the connecting body 4 and the fixing portion 31 are fixed.

As shown in FIGS. 1 and 3, the armrest main body 5 is a plate body that is curved with the same curvature in the horizontal direction as the connecting body 4, and its upper surface is a bearing surface 51 for supporting the elbow of a seated person. Has been formed. The bearing surface 51 may be covered with velvet, leather or the like to make the contact feeling with the elbow comfortable. The lower surface of the armrest main body 5 is provided with parallel ridges 52 which are curved and extend in parallel with each other, and the distance between the ridges has the same dimension as the width of the connecting body 4, and the both ridges 52 are provided. A tenon 521, which is opposed to the lower end and is slidably fitted in the tenon groove 42 of the connecting body 4, is provided in a protruding manner (FIG. 4). In order to prevent the armrest main body 5 that slides with respect to the connecting body 4 from coming off from the connecting body, in this embodiment, a closed end 522 is formed at one end of the ridge 52 and near the open end 523 at the other end. An elastic plastic pawl 53 protruding downward from the inner surface of the armrest body 5 is provided at an appropriate position. The pawl 53 is provided with a tapered surface 531 facing the open end 523 and a locking surface 532 facing the closed end 522.

To assemble the chair armrest of the present embodiment, as shown in FIGS. 3 and 4, first, the connecting body 4 is engaged with the upper edge of the fixing portion 31 of the support body 3, and the hole 311 of the fixing portion and the connecting body. After the through holes 44 of 4 are aligned, a bolt 45 is inserted and the connecting body 4 is screwed onto the upper surface of the fixing portion 31. At this time, the head 451 of the bolt 45 is retracted into the engagement seat 441 of the hole 44. After that, the open end 523 of the armrest main body 5 is pushed from one end of the connecting body 4 toward the other end of the connecting body 4 so as to be slid. At this time, both mortises 521 on the bottom surface of the armrest main body 5 correspond to the mortise grooves 42 of the connecting body 4 respectively, and the tapered surface 531 in the pawl 53 of the armrest main body corresponds to the edge of the connecting body. Let When sliding, the pawl 53 is slightly pressed into the gap between the inner bottom surface of the armrest main body 5 and the connecting body 4 due to its own elasticity. Then, when the armrest main body 5 is slid further and the pawl 53 passes over the other end of the connecting body 4, the crimped state of the pawl is released and elastically returns to the original shape, and the locking surface 532 has the locking surface 532. It serves as a stopper that faces the edge and limits the sliding range of the armrest main body 5, and can prevent the armrest main body 5 from coming off the connecting body 4. When using the chair armrest of the present embodiment, as shown in FIG. 2, the armrest main body 5 may be moved back and forth in the chair front-back direction to adjust the position according to the posture of the seated person. The comfort and convenience on the top can be improved. Further, in adjusting the position of the armrest main body 5, the armrest main body does not come off from the connecting body 4 due to the restriction of the pawl 53 at the closed end 522 and the open end 523.

Further, when viewed from the design side of the present invention, the tenon 521 and the tenon groove 42 slidably fitted to each other are a general tenon joint fitting (a dovetail-shaped tenon joint fitting may be used), and an armrest. The structural members such as the main body 5, the connecting body 4, and the fixing portion 31 are provided in a curved shape in consideration of the operation of the computer by the occupant, and the occupant leans forward with his or her upper body forward. This is because, when the arms are turned forward while the arms are closed, the main body of the armrest can be slid and slid while the two elbows are placed on the main body 5 of the armrest. When used by a person who does not operate the computer, it is not always necessary to form the above member into a curved shape. Further, the pawl 53 for preventing the armrest main body 5 from coming off from the connecting body 4 during the sliding adjustment may be provided as an engaging hook which can be housed in the connecting body 4 to facilitate the assembly.

Regarding the sliding movement of the armrest main body 5 with respect to the connecting body 4, there is only a fixing effect due to the fitting frictional stop of the tenon 521 and the tenon groove 42, and the tenon 521 and the tenon groove 42 are fitted together by long-term use. Therefore, in the second embodiment of the present invention, as shown in FIG. 5, a recessed hole 46 is provided in the upper end surface of the connecting member 4 ', and a tension spring, for example, is provided in the recessed hole. , A steel ball 48 supported by a compression coil spring 47 is mounted, and an appropriate number of locking recesses 54 are arranged at a position corresponding to the recessed hole 46 on the inner bottom surface of the armrest main body 5 ′ facing the upper end surface, The engagement between the steel ball 48 and the locking recess 54 enables the armrest main body 5'to be fixed at a predetermined position while sliding on the connecting body 4 '.

[0019]

[Effect of device]

 As described above, in the chair armrest of the present invention, the connecting body is fixed to the fixed portions of the supports fixed to the left and right sides of the seat, and the armrest body is slidably fitted to the connecting body. Therefore, the armrest main body can be moved and adjusted to the most ideal armrest position according to the posture of the seated person, and both elbows of the seated person can be comfortably supported.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a chair armrest according to a first embodiment of the present invention.

FIG. 2 is a plan view of a chair to which the armrest of FIG. 1 is attached.

3 is a cross-sectional view of an armrest support 3 and an armrest body 5 of FIG.

FIG. 4 is a vertical sectional view of the armrest shown in FIG.

FIG. 5 is a vertical sectional view of a chair armrest according to a second embodiment.

FIG. 6 is a perspective view of a conventional chair.

[Explanation of symbols]

 21 seat 3 support 31 fixed part 311 hole 4 connector 41 concave part 42 mortise groove 44 through hole 45 bolt 5 armrest body 521 mortise 522 closed end 523 open end 53 pawl 531 taper surface 532 locking surface

Claims (6)

[Scope of utility model registration request] 1. A support having a lower end fixed to an appropriate position on a side edge of the seat and a fixing part provided on an upper end extending substantially parallel to the side edge of the seat, and a tenon groove provided at both ends of the support. A connecting body fixed to the upper surface of the fixing portion and an armrest main body attached to the upper surface of the connecting body are provided, and a tenon slidably fitted to the tenon grooves on both sides of the connecting body is provided on the lower surface of the armrest main body. A chair armrest configured such that each of the ridges is provided, and the armrest main body slides with respect to the connection body by the tenon and the tenon groove so that the armrest main body can be moved back and forth in the chair front-rear direction. 2. The chair armrest according to claim 1, wherein the fixing portion, the connecting body, and the armrest main body are curved to have an appropriate horizontal curvature so as to surround the seat. 3. A convex strip on the lower surface of the armrest main body is formed with one end in the longitudinal direction as a closed end and the other end as an open end, and a pawl made of an elastic plastic is provided near the open end, and the pawl is attached to the pawl. The chair armrest according to claim 1, wherein a taper surface facing the open end portion and a locking surface facing the closed end portion are formed. 4. The chair armrest according to claim 1, wherein the fixing portion is formed in a pipe shape, and the bottom surface of the connecting body is formed into a concave portion that engages with a pipe-like peripheral surface of an upper edge of the fixing portion. 5. A plurality of holes are formed along the upper edge of the fixing portion, a plurality of through holes corresponding to the holes are formed in the connecting body, and a bolt with a screw is inserted from the through hole into the hole. The chair armrest according to claim 1, wherein the connecting body is attached to the upper edge of the fixing portion by screwing. 6. A recessed hole in which a steel ball supported by a tension spring is loosely provided is provided on an upper end surface of the connecting body, and the lower surface of the armrest main body facing the upper end surface is provided at a position corresponding to the recessed hole. The chair armrest according to claim 1, wherein an appropriate number of locking recesses are provided, and the steel ball and the locking recess are engaged with each other so that the armrest main body can be fixed to a predetermined position.