JPH1042999A - Armrest structure for chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of installing an armrest main body at the optimum turn position according to a user, simplifying the turning action, and having a simple structure. SOLUTION: This armrest structure for a chair is provided with a engaging protrusion 33 urged in the protruding direction on the upper face of each armrest base 20 and multiple protrusion receiving recesses 32 corresponding to the engaging protrusion 33 on the lower face of each armrest main body 30. When the engaging protrusion 33 is engaged with the prescribed protrusion receiving recess 32, the armrest main body 30 is fixed at the prescribed turn position. The engaging protrusion 33 is thrust and immersed below the armrest main body 30 by the rotating action of the armrest main body 30, and the engagement with the protrusion receiving recss 32 is released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an armrest structure for an office chair or the like.

[0002]

2. Description of the Related Art In recent years, with the advent of the highly information-oriented society, personal computers,
The work of using a word processor, so-called personal computer work, is increasing, but in order to be able to perform this personal computer work without any trouble for a long time, the position of the seat, backrest and armrests should be adjusted according to the physique and posture of the user. It is preferred to use the corresponding one.

[0003]

In such a situation, in the conventional office chair, a seat and a backrest are moved to a position desired by a user by a seat height adjustment mechanism and a backrest angle adjustment mechanism. Although it can be adjusted, most armrests cannot be adjusted easily, it is difficult to set the armrest to the optimal position for the user, and comfortable work for the user There was a problem that the environment could not be obtained.

On the other hand, in recent years, a chair capable of adjusting the position of an armrest has been proposed, but it is still in the process of being developed, and for example, the structure is complicated or the operation of adjusting the position of the armrest is troublesome. Is a problem.

The present invention solves the above-mentioned problems of the prior art, and enables the armrest main body to be set at an optimum turning position according to the user and the like, and also allows the turning operation to be performed easily and has a simple structure. An object is to provide an armrest structure.

[0006]

In order to achieve the above object, an armrest structure for a chair according to the present invention comprises a mounting piece attached to a lower surface of a seat, and an upper end passing through a side of the seat from an outer end of the mounting piece. An L-shaped armrest frame having a vertical piece extending toward the armrest; an armrest support provided at an upper end of the vertical arm of the armrest frame; A main body, and on the upper surface of the armrest support, an engaging projection urged in a protruding direction by an urging means is provided, and on the lower surface of the armrest body, the engaging projection is provided. Correspondingly, a plurality of projection receiving recesses are provided, and the engaging projections are projected by the urging force of the urging means and engage with the predetermined projection receiving recesses, so that the armrest body is at a predetermined turning position. Fixed That one, by turning operation of the armrest body, the engaging projection is summarized as made is configured such that the engagement with the projection receiving recess retracts pressed into the lower surface armrest body is released.

[0007] In the armrest structure of the chair of the present invention,
The armrest body can be arranged at an appropriate turning position according to the user or the like. Furthermore, as a mechanism for fixing the armrest main body at a predetermined turning position, by adopting a simple structure in which the engagement projection on the armrest support body side is engaged with the projection receiving recess on the armrest main body side, the entire armrest structure is improved. It can be formed simply. Moreover, when the armrest body is operated to rotate, the engagement of the engagement projection with the projection receiving recess is automatically released, and when the armrest body is pivoted to a desired position, the engagement projection is at that position. It automatically engages with the projection receiving recess. In this way, the position fixing operation and the fixing releasing operation at the time of the turning operation of the armrest main body can be automatically performed without the necessity of separately performing the lever operation or the push button operation.

[0008] In the present invention, the armrest support is
A configuration in which the armrest frame is slidably attached to the vertical piece in the length direction and can be fixed at an arbitrary slide position, or the attachment piece of the armrest frame is provided on the lower surface of the seat body with respect to the seat body. It is preferable to adopt a configuration that is slidably attached to the side and fixedly attached to an arbitrary slide position.

In other words, when these configurations are adopted, the height position and side position of the armrest body can be adjusted, and the armrest body can be arranged at a more appropriate position according to the user or the like. it can.

[0010]

FIG. 1 is a perspective view showing a chair to which an armrest structure according to an embodiment of the present invention is applied. As shown in the figure, the armrest structure of this chair includes an armrest frame (10), an armrest support (20), and an armrest body (30) as basic components on both the left and right sides.

As shown in FIGS. 1 to 3, the armrest frame (10) is substantially L-shaped, and has a mounting piece (11) arranged horizontally and a vertical piece (1) arranged vertically.
5) are integrated. The vertical piece (15) is provided with a pin guide slot (16) extending in the length direction (vertical direction) at the center of the upper half thereof.
At a position on both sides of (6), a plurality of pairs of pin engaging notches (17) facing each other are provided along the vertical direction so as to communicate with the elongated holes (16).

Also, the mounting piece (1) of the armrest frame (10)
In 1), a screw hole (12) is formed substantially at the center.

On the other hand, as shown in FIGS. 1 and 2, a bracket (14) having a substantially inverted hat-shaped cross section is fixed to the lower surface of the seat body (1) of the chair by screwing. The bracket (14) has an elongated hole (14a) formed in the center plate thereof, extending in the left-right direction (both sides) with respect to the chair. Then, the mounting piece (11) of the armrest frame (10) is slidably inserted along the side between the central plate portion of the bracket (14) and the lower surface of the seat body (1). In that state, handle with screw (2)
Screw shaft (2a) of the bracket (14) of the slot (14)
a) and fastened to the screw hole (12) of the mounting piece (11). As a result, the mounting piece (11) of the armrest frame (10) is pressed against the center plate portion of the bracket (14), and the armrest frame (10) is positioned so that its vertical piece (15) is located on the side of the seat body (1). Is fixed to the seat body (1) in a state of extending upward from the seat.

Note that the armrest frame (10) is provided with the bracket (1) by loosening the threaded handle (2).
The crimping to 4) is released, and the attachment piece (11), that is, the armrest frame (10) is configured to be able to slide along the side (in the seat width direction). Furthermore, by tightening the threaded handle (2) in a state where the armrest frame (10) is arranged at an arbitrary slide position, the armrest frame (10) can be fixed at that position.

As shown in FIGS. 1 to 4, the armrest support (20) comprises an elevating body (21) and the elevating body (21).
Outer cover (2) attached to cover the outer
2). The elevating body (21) is a cylindrical body having a cylindrical hole having a rectangular cross section inside, and a flat armrest mount (26) is provided at the upper end. The vertical body (15) of the armrest frame (10) is inserted in the vertical direction (up and down) of the armrest frame (10) such that the vertical piece (15) of the armrest frame (10) is inserted into the cylindrical hole from the lower end opening thereof. direction)
Is slidably fitted to the outside.

In one side wall (a wall located inside the chair) of the elevating body (21), a pin mounting hole consisting of a long hole extending in the horizontal direction (the front-back direction with respect to the chair) is provided substantially in the center. (21a) is drilled. Further, the other side wall (the wall located outside of the chair) of the elevating body (21) is provided with a lock means arrangement hole (21) formed of a long hole extending vertically in the center of the upper half.
b) is drilled and the locking means arrangement hole (2)
A pair of pin mounting notches (21c) are formed at both sides of 1b) corresponding to the pin mounting holes (21a).

The pin mounting hole (21) of the lifting body (21)
a), a pair of engaging pins (23) and (23) are slidably inserted along the length direction of the hole in a parallel state, and the pins (23) and (23) are further inserted into the armrest frame. The pin mounting hole (21a) is closed inside the elevating body (21) in this state by being inserted into the pin guide slot (16) and the pair of pin mounting notches (21c). Cover (24) is attached by screws.

The pair of engaging pins (23) thus attached to the armrest support (20) are configured to be able to contact and separate from each other by sliding along the pin mounting holes (21a). I have. Further, when the pair of engagement pins (23) and (23) approach each other based on the contact and separation movement, the engagement pins (23) and (23) are moved by the armrest frame (1).
0) and is configured to be able to move vertically along the pin guide slot (16), and a pair of engagement pins (2).
3) In the state where (23) is separated, each engagement pin (23)
(23) is a pair of corresponding notches for pin engagement (17);
(17) are configured to engage with each other to prevent vertical movement.

The outer cover (22) of the armrest support (20) is provided with a substantially rectangular window hole (28) at the upper center.

On the other hand, the operating means (40) provided on the armrest support (20) has a finger rest (4)
1) is integrally formed, and a lock means (42) is integrally formed at a lower portion on the other surface side.

As shown in FIG. 5, the locking means (42) includes an insertion / removal block (42a) having a predetermined width,
The lead portion (42) is provided continuously at the lower end of the insertion / removal block (42a) and has a narrower width than the insertion / removal block (42a).
c), and the insertion / removal block (4) of the lead portion (42c).
2a), a tapered guide surface (42)
b) is provided.

As shown in FIGS. 2 to 4, a lock means (42) is slidably inserted into a lock means arrangement hole (21b) of the elevating body (21), and a pair of engagement pins (42) is provided. The operation means (40) is arranged in a mode inserted between (23) and (23). Further, the operation means (40)
The outer cover (22) covers the elevating body (2).
It is attached to the outer surface side of 1). At this time, the finger cover (41) of the operation means (40) is arranged so as to face the window (28) of the outer surface side cover (22), and the upper end of the operation means (40) and the armrest support (20) A biasing means (43) composed of a compression spring is interposed between the inner surface of the upper wall and the upper wall.

In this configuration, in the normal state, the operating means (40) is urged downward by the urging force of the urging means (43) as shown in FIG. It is arranged between the mating pins (23) and (23) so that the pair of engaging pins (23) and (23) is held in a separated state. Further, as shown in FIG. 7, an operating means (40) arranged in a window (28) of the outer cover (22).
The finger hook (41) is externally operated to operate the operating means (4).
0) and the urging means (4)
By lifting upward against the biasing force of 3), the insertion / removal block (42a) allows the pair of engagement pins (23) (2)
3) The lead (4
2c) is arranged so that the pair of engagement pins (23) (23) can be moved closer to each other.

The lead portion (42) of the locking means (42)
c) is disposed between the engaging pins (23) and (23) in the approaching state, and the engaging pins (23) and (23) are moved on both sides of the lead portion (42c) by the urging force of the urging means (43). When moving to both sides of the insertion / removal block (42a) from the
3) (23) is configured to be smoothly guided by the guide surface (42b).

On the other hand, as shown in FIGS. 8 to 12, the armrest main body (30) is made of a resin foam or the like, has a concave portion on the lower surface side, and has a rotating plate made of synthetic resin in the concave portion. (31) is fixed.

The pivot plate (31) has a shaft screw fixing hole (31a) at the rear and a guide screw fixing hole (31b) at the center. Further, on the lower surface side of the turning plate (31), the shaft screw fixing hole (31) is provided.
Three oval projection receiving recesses (32) are provided along an arc line having a fulcrum as a fulcrum.

The fixing plate (35) disposed below the turning plate (31) corresponds to the shaft screw fixing hole (31a) of the turning plate (31).
5a) is formed, and corresponds to the guide screw fixing hole (31b) of the revolving plate (31), and has an arc-shaped guide hole extending along an arc line centered on the shaft screw insertion hole (35a). (35b) is drilled.

Further, in the front part of the fixing plate (35), there is provided an engaging projection component accommodating recess (35c) corresponding to the projection receiving recess (32), and the recess (35).
An engagement projection part (34) is fitted in c). As shown in FIG. 13, the engaging projection component (34) includes a bottomed cylindrical casing (34a) having an open upper end, and a biasing means including a compression spring and the like housed in the casing (34a). (34b) and an engagement projection (33) made of a metal ball housed in an upper portion of the casing (34a). In the normal state, the urging means (34)
Due to the urging force of b), a part of the engagement projection (33) is arranged so as to protrude upward from the upper end of the casing (34a), and the engagement projection (33) is biased by the urging means (34b).
If it is pushed downward against the urging force of
Is housed in the casing (34a).

The fixing plate (35) having this structure is the same as that shown in FIG.
As shown in FIG. 9, the shaft screw insertion hole (35a), the guide hole (35b), and the engagement projection (33) are provided with the shaft screw fixing hole (31a) and the guide screw fixing hole (31b) of the turning plate (31). And a screw connecting member (36) is arranged on the lower surface side of the fixed plate (35) so as to correspond to the projection engaging concave portion (32), respectively. With the shaft screw (37
a) is a screw connection member (36) and a shaft screw insertion hole (35).
a) and is fixed to the shaft screw fixing hole (31a), and the guide screw (37b) is penetrated by the screw connecting member (36) and the guide hole (35b), and is fixed to the guide screw fixing hole (31b). ). Further, the front and rear ends of the fixing plate (31) are fixed to the armrest mount (26) of the armrest support (20) by screws (38) (38).

In this state, the rear side shaft screw (3
7a), the pivot plate (31), that is, the armrest body (30) is configured to be pivotable with respect to the fixed plate (35), and at the time of the pivoting operation, the guide screw (37b) at the center is used. ) Is the guide hole (35)
b) by moving along the armrest plate (3
The turning operation of 0) is configured to be performed smoothly.

Further, the engaging projections (3) of the fixing plate (35)
3) is urged by the urging force of the urging means (34b) so as to protrude toward the lower surface of the revolving plate (31), and the engaging projection (33) of the revolving plate (31) receives a suitable projection. The swivel plate (31) is configured to be fixed at an appropriate swivel position by engaging with the recess (32).

If the armrest main body (30) is operated so as to be pushed in the turning direction, the engaging projection (33) is pushed into the lower surface of the turning plate (31) to be immersed, and the projection of the engaging projection (33) is formed. The engagement with the receiving recess (32) is automatically released, so that the turning operation can be performed without any trouble.

In the chair having the above structure, in the normal state, the insertion / removal block (42a) of the lock means (42) in the armrest support (20) is provided with the urging means (43) as shown in FIG. Pushed downward by the urging force, the pin is inserted between the pair of engagement pins (23) and (23), and
(23) are separated from each other and are engaged with the appropriate pin engaging notches (17) and (17) of the armrest frame (10), and the armrest support (20) and the armrest body (30) move up and down. Has been blocked.

On the other hand, in this chair, the physique of the user,
When adjusting the height of the armrest main body (30) in accordance with the posture or the like, the fingerrest (41) of the armrest support (20) is used.
Is lifted upward, and as shown in FIG. 7, the insertion / removal block (42a) is removed from between the pair of engagement pins (23) (23), and the lead (42c) is positioned therebetween. A state is set in which the approaching movement of the mating pins (23) and (23) is allowed. In this state, the armrest body (30)
Of the pair of engaging pins (23) (2)
3) approaches and moves along the pin guide slot (16), so that the armrest body (30) can be smoothly moved up and down. Then, after the armrest body (30) is moved to a desired height and the lifting operation of the finger hook (41) of the operating means (40) is released, as shown in FIG. The pair of engaging pins (23) are pushed downward by the urging force of the urging means (43).
(23), the pins (23) and (23) are separated from each other, and the corresponding pin engagement notches (17) and (17)
Engage in. Thereby, a pair of engagement pins (23) (2)
The vertical movement of 3), that is, the vertical movement of the armrest body (30) is prevented, and the armrest body (30) is fixed at a desired height position.

In the chair according to the present embodiment, the horizontal direction of the armrest body (30) can be changed according to the user's preference and the like. That is, the armrest body (3
0) is rotated in a desired direction with a relatively strong eye force, and as described above, the protrusion receiving holes (3) of the engaging protrusions (33) are formed.
The engagement with 2) is automatically released, and the armrest body (30) can be turned without any trouble. Then, when the armrest body (30) is turned to a desired direction, at that position,
Since the engaging projections (33) are engaged with the corresponding projection receiving holes (32), the armrest body (30) is fixed at a desired turning position.

Further, in the chair according to the present embodiment, if the handle (2) with a screw disposed on the lower surface side of the seat plate (1) is loosened, the armrest body (30) is moved from the frame (10) to the left and right. Since the sliding can be performed, the armrest frame (10), that is, the armrest body (30) can be fixed at the arbitrary sliding position by tightening the handle (2) at that position.

As described above, according to the chair of the present embodiment,
Since the height of the armrest body (30) can be adjusted, and the direction (turning position) and the horizontal position of the armrest body (30) can be adjusted, the armrest body (30) can be adjusted according to the user. Can be set to position. Therefore, the original function of the armrest can be sufficiently exhibited, and a comfortable working environment can be provided to the user.

Further, in the present embodiment, as a lock mechanism for fixing the turning position of the armrest body (30), a simple structure in which the engaging projection (33) is engaged with the projection receiving recess (32) is employed. As a result, the entire armrest structure can be simply finished.

In addition, when the armrest body (30) is operated to rotate in a desired turning direction, the engagement of the engagement projection (33) with the projection receiving recess (32) is automatically released, and the armrest is simultaneously released. When the main body (30) is operated to a desired turning position, the engaging projection (33) is automatically engaged by the urging force of the urging means (34b). Thus, the armrest body (3
Since the position fixing operation and the fixing releasing operation at the time of the turning operation of 0) need not be separately performed by using the rotating lever or the push button, the armrest turning operation can be easily performed.

In the armrest structure of the present embodiment,
A pair of pin engaging notches (17) (1) provided on the armrest frame (10) are provided with a pair of engaging pins (23) (23).
7) to prevent the height movement of the armrest body (30), so that the load applied to the armrest is
Two pins (23) (23) or two notches (1
7) Since it can be dispersed and supported on (17), the armrest body (30) can be supported in a well-balanced manner.
Can be fixed in a stable state. Therefore, the armrest body (3
It is possible to reliably prevent such a problem that rattling occurs in 0). Two more notches (17) (1
According to 7), the armrest load is dispersed and supported, so that the vertical pitch of the notches (17) and (17) is reduced while securing sufficient strength around the notches (17) and (17). can do. Therefore, the armrest body (3
The height of 0) can be finely adjusted at a small pitch, and the armrest body (30) can be further installed at an appropriate position.

[0041]

As described above, according to the armrest structure of the chair of the present invention, the armrest body is configured so as to be swivelable and can be fixed at a predetermined swing position.
It can be arranged at an appropriate turning position according to the user or the like. Furthermore, since the armrest main body is fixed at a predetermined position by a simple structure in which the engagement protrusion on the armrest support body is engaged with the projection receiving recess on the armrest body, the entire armrest structure can be simply finished. it can. Moreover, by operating the armrest body to rotate, the engagement of the engagement projection with the projection receiving recess is automatically released,
When the armrest body is pivoted to a desired position, the engaging projection automatically engages with the projection receiving recess at that position. As described above, since the position fixing operation and the fixing releasing operation at the time of the turning operation of the armrest body can be automatically performed without the need to separately perform the lever operation or the push button operation, there is an effect that the armrest turning operation can be easily performed.

In the present invention, when the armrest support is configured to be movable up and down, or when the armrest body is configured to be movable in both sides, the height position and the side position of the armrest body can also be adjusted. There is an advantage that the armrest body can be arranged at a more appropriate position according to the user or the like.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a chair to which an armrest structure according to an embodiment of the present invention is applied.

FIG. 2 is an exploded perspective view showing a frame mounting portion in the armrest structure of the embodiment.

FIG. 3 is an exploded perspective view around an armrest support in the armrest structure of the embodiment.

FIG. 4 is a perspective view showing an elevating member of an armrest support in the armrest structure of the embodiment.

FIG. 5 is a perspective view showing the vicinity of an insertion / removal block in the armrest structure of the embodiment.

FIG. 6 is a partially cutaway side view showing the armrest structure of the embodiment in a state in which the armrest main body is prevented from moving up and down.

FIG. 7 is a partially cutaway side view showing the armrest structure of the embodiment in a state in which the armrest main body is allowed to move up and down.

FIG. 8 is an exploded perspective view of the armrest main body mounting portion and its surroundings in the armrest structure of the embodiment.

9A and 9B are diagrams showing an armrest body attaching portion in the armrest structure of the embodiment, wherein FIG. 9A is a plan view and FIG.
Is a side sectional view.

FIG. 10 is a sectional view taken along line XX of FIG. 9;

11A and 11B are diagrams showing a swivel plate applied to an armrest body attachment portion in the armrest structure of the embodiment, wherein FIG. 11A is a plan view, FIG. 11B is a side sectional view, and FIG. () Is a bottom view.

FIGS. 12A and 12B are views showing a fixing plate applied to the armrest main body mounting portion in the armrest structure of the embodiment, wherein FIG. 12A is a plan view and FIG. 12B is a side sectional view.

FIG. 13 is a side view showing an engagement protrusion component applied to the armrest body attachment portion in the armrest structure of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Seat 10 ... Armrest frame 11 ... Attachment piece 15 ... Vertical piece 20 ... Armrest support body 30 ... Armrest body 32 ... Projection receiving recess 33 ... Engagement projection 34b ... Urging means

Claims (3)

[Claims] An attachment piece attached to a lower surface of a seat body,
An L-shaped armrest frame having a vertical piece extending upward from the outer end of the mounting piece through the side of the seat, an armrest support provided at an upper end of the vertical piece of the armrest frame, and an upper surface of the armrest support And an armrest body attached to the armrest support so as to be pivotable about a vertical axis. An engagement projection urged in a protruding direction by an urging means is provided on an upper surface of the armrest support. A plurality of projection receiving recesses are provided on the lower surface of the armrest main body corresponding to the engagement projections, and the engagement projections protrude by the urging force of the urging means, and engage with the predetermined projection receiving recesses. By the engagement, the armrest body is fixed at a predetermined turning position, while the turning operation of the armrest body causes the engagement protrusion to be pushed into the lower surface of the armrest body and immersed, thereby engaging with the protrusion receiving recess. Armrest structure of the chair, characterized by comprising configured to be divided. 2. The armrest structure for a chair according to claim 1, wherein said armrest support is slidably attached to a vertical piece of said armrest frame in a longitudinal direction and fixed at an arbitrary sliding position. 3. The armrest frame mounting piece is attached to a lower surface of the seat body so as to be slidable laterally with respect to the seat body and so as to be fixable at an arbitrary sliding position. Chair armrest structure.