JP3543071B2 - Office chair backrest - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a structure of a backrest in an office swivel chair.
[0002]
[Prior art]
Recently, high-performance swivel chairs for office use have been used in which the back and seats are synchronized, and the seat plate and backrest follow the changes in the seated person's posture. Was. This is because offices and other office automation are becoming more commonplace, and work styles using personal computers or other personal computers in the office are becoming commonplace. Chairs used in such cases include: This is because, for example, in the case of a conventional chair in which only the backrest is tilted backward, if a long-time operation such as a keyboard operation is performed, the user tends to be tired, which is not preferable.
[0003]
As described above, the recent office chairs have a structure in which an inner shell is provided inside the seat plate and the backrest in accordance with the sophistication and performance of the chair, and various measures have been added to the shell. In terms of design, the lower surface of the seat plate and the back surface of the backrest are covered with an outer shell to create a sense of volume and luxury of the chair, but there is another problem.
[0004]
That is, for example, if the inner shell is placed inside the backrest and the back of the backrest is covered with the outer shell, a screw may be used to fix the inner shell to the chair frame, or the inner shell or the backrest may be used. The use of fasteners such as screws to connect the frame and outer shell not only makes tools such as a screwdriver indispensable for assembling and disassembling the backrest, but also requires considerable labor for assembling and disassembling operations. One. Further, from the viewpoint of replacement of the backrest and recycling at the time of disposal, it is desired that the chair has a structure that can easily perform the separation process.
[0005]
[Problems to be solved by the invention]
In view of the above problems, the present invention does not use a tool such as a screwdriver for assembly and disassembly, and is useful when applied to an office chair provided with a structure that is easy to handle from the viewpoint of recycling. It is an object to provide
[0006]
[Means for Solving the Problems]
The present invention backrest structure was made in order to solve the above problems, a back support member provided with the binding member provided with cloth columnar member and said columnar member which is raised in the vertical direction, the front A backrest shell member formed on a backrest surface of a seated person, a fitting portion fitted to the upper end of the columnar member on the back surface, a locking piece engaged with the coupling member from above, and provided near the outer periphery of the back surface A backrest inner shell member formed with a fastener member coupled to a corresponding fastener member formed on the outer shell, and an outer shell covering the shell member attached to the backrest support member from the back side with the support member interposed therebetween. a is, to form a locking piece which engages from below to the coupling member and the fastener member coupled to the fastener member of the shell member on the front surface Autashi Consists of a Le, the two shell members, and a coupling member and the columnar member in the back support member, is characterized in that mounted to embrace from the front and rear surfaces as well as upper and lower surfaces.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings. 1 is an exploded perspective view of a chair provided with an example of the backrest of the present invention, FIG. 2 is a side sectional view of a main part of the backrest of the present invention, and FIG. 3 is a side sectional view of the chair of FIG. 1 provided with the backrest of the present invention. It is.
[0008]
1 to 3, reference numeral 1 denotes a backrest supporting member, and in the illustrated example, two vertical L-shaped columnar members 11 and 12, and upper and middle portions of the columnar members 11 and 12. And horizontal connecting members 13 and 14 which are erected and fixed so as to connect the two members 11 and 12 to each other.
[0009]
Reference numeral 2 denotes an inner shell member of a backrest provided on the front surface of the backrest support member 1, and a cushion material 3b covered with an outer skin 3a is formed on the front surface thereof so as to be able to be attached as a backrest 3, The back side of the inner shell 2 is formed as follows.
[0010]
Thus, on the back surface side of the inner shell member 2, two cylindrical right and left fitting portions 2 a which cover the upper ends of the columnar members 11 and 12 of the support member 1, Two substantially right-and-left locking pieces 2b that are locked from the upper side are formed. In the vicinity of the outer peripheral edge on the back surface side of the shell member 2, one of the male and female coupling type fastener members formed on the front surface of the outer shell 4 to be described later, here a plurality of female members 2c, is provided. Is formed so as to protrude from the back surface.
[0011]
Since the inner shell member 2 is usually formed as a molded product of a synthetic resin material, the two fitting portions 2a, the engaging pieces 2b, and the female member 2c of the coupling fastener are all integrated with the shell member 2. It is molded. The inner shell member 2 fits the two fitting portions 2a to the upper ends of the columnar members 11 and 12 of the back support member 1 and simultaneously engages the engaging piece 2b with the upper side of the lower coupling member 14 from above. The inner shell member 2 is stopped and stopped on the front side of the support member 1. However, if the inner shell member 2 is lifted upward, the inner shell member 2 is easily detached from the support member 1. Therefore, in the present invention, the inner shell member 2 is fixed to the front surface of the support member 1 by cooperating with the outer shell 4 described later.
[0012]
Reference numeral 4 denotes an outer shell which is joined to the shell member 2 from the rear side of the support member 1 to cover the support member 1 in cooperation with the inner shell member 2 and is formed as follows. That is, the outer shell 4 has two pairs of upper and lower locking pieces which are engaged with the lower and upper sides of the two members 13 and 14 on the front surface thereof and are connected to the coupling member 13 of the support member 1. 4a and 4b are formed so as to protrude at a substantially central portion of the front surface of the shell 4 and are formed at a portion opposed to the female member 2c of the coupling fastener formed along the outer peripheral edge of the back surface of the inner shell member 2. The male member 4c is formed so as to protrude toward the front side.
[0013]
A description will be given of a form of connection between the above-described backrest support member 1, the inner shell member 2 having the backrest 3 attached to the front surface, and the outer shell 4. First, the inner shell member 2 having the backrest 3 on the front surface is applied to the front side of the support member 1, and the two fitting portions 2a of the shell member 2 are connected to the columnar members 11 and 12 of the support member 1. At the same time as covering the upper end, the lower engaging piece 2b is engaged with the upper side of the lower connecting member 14 of the support member 1 from above.
[0014]
Next, the outer shell 4 is applied to the back side of the back support member 1, and the upper and lower locking pieces 4a and 4b are applied to the lower sides of the upper and lower coupling members 13 and 14 of the support member 1 from below. The male member 4c of the coupling fastener protrudingly formed at the outer peripheral edge of the front surface of the shell 4 at the same time is sequentially coupled to each female member 2c of the inner shell member 2 to which the respective member 4c faces, The inner shell member 2 and the outer shell 4 are attached to the support member 1 with the back support member 1 sandwiched from the front and rear surfaces thereof.
[0015]
In this case, the inner and outer shells 2 and 4 fit the columnar members 11 and 12 and the coupling members 13 and 14 of the backrest support member 1 from above with respective fitting portions 2a and locking pieces 2b. At the same time, the shells 2 and 4 are joined and integrated by the coupling fasteners 2c and 4c, and the backrest 3 including the shells 2 and 4 is attached. There is no danger of falling off or falling off the support member 1. Moreover, since the mounting structure of the shells 2 and 4 to the support member 1 does not use any fasteners such as screws, it is possible to assemble or disassemble without using such hardware or a dedicated tool such as a screwdriver. There is an advantage that it becomes.
[0016]
Next, the office chair provided with the backrest of the present invention described with reference to FIGS. 1 to 3 has the following configuration as an example, and will be described below.
[0017]
The support member 1 of the backrest is formed as a lever member 5 having a substantially L-shape (reversed left and right in the illustrated example) as viewed from the side, with the lower part of the columnar members 11 and 12 bent in the horizontal direction, The tip of the lever member 5 is further bent downward to form a spring pressing portion 5a.
[0018]
On the other hand, on the upper end of a leg support 6 having a flat star-shaped foot 6a at the lower end and a gas spring 6b inside, a substantially box-like shape for pivotally supporting the front end of the lever member 5 by a horizontal mounting shaft 7 is provided. The base member 8 is supported on the bottom surface near the rear. A coil spring 9 whose rear end is supported by the spring pressing portion 5a of the lever member 5 is housed inside the base member 8. . A spring receiver 9a is formed on the distal end side of the spring 9 of the base member 8 so as to be able to move back and forth inside the base member 8.
[0019]
On the other hand, left and right bearing brackets 10 each having a horizontally long hole 10a for bearing are provided on the left and right sides of the front end of the base member 8 so as to protrude forward, and a first horizontal shaft 21 is installed in the left and right long holes 10a. ing. At the middle of the horizontal portion of the lever member 5, a second horizontal shaft 22 parallel to the first horizontal shaft 21 is attached. On both of the horizontal shafts 21, 22, a seat inner shell 23 is provided. The bearing brackets 24 and 25 are formed so as to protrude downward from front and rear of the lower surface, and are engaged and supported by bearing notches 24a and 25a.
[0020]
Here, the seat inner shell 23 has a cross-sectional shape, ribs, and the like that increase the rigidity of the periphery 23a, and a slit 23c of an appropriate pattern is formed so that the central portion 23b bends well. A seat plate 26 made of a cushion material 26b covered with an outer skin 26a is attached to the. The periphery of the outer skin 26a of the seat plate 26 is fixed to a groove around the back surface of the shell 23 by a holding fastener 23d. In FIG. 1, reference numeral 27 denotes an armrest mounting seat provided on the right and left rear portions of the lever member 5, reference numeral 28 denotes an armrest, and reference numerals 29 and 30 denote undercovers that cover the lower surfaces of the base member 8 and the lever member 5. An example of an office swivel chair to which a backrest is applied is formed.
[0021]
【The invention's effect】
The present invention is as described above.In the present invention, not only the backrest but also the seat plate is covered with a shell member and an outer shell whose constituent members are connected without using any fasteners such as screws. And the respective shell members can be mounted on the respective mounting portions without using fasteners such as screws, and therefore, no tools are required. And in terms of cost.
[0022]
Also, since the backrest and the seat plate do not use any fasteners or tools, the backrest and the seat plate can be easily removed from the chair body when replacing or discarding, and also suitable for so-called separation processing. I have.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a chair provided with an example of the backrest of the present invention.
FIG. 2 is a side sectional view of a main part of the backrest of the present invention.
FIG. 3 is a side sectional view of the chair of FIG. 1 provided with a backrest according to the present invention;
[Explanation of symbols]
1 Back support members
11,12 Columnar member
13, 14 Coupling member 2 Back inner shell member
2a Mating part
2b Lock section
2c Female member of the fastener 3 Back
3a skin
3b Cushion 4 Outer shell
4a, 4b Upper and lower locking pieces
4c Male member of coupling fastener 5 Lever member

Claims (2)

A back support member provided with the binding member provided with cloth columnar member and said columnar member which is raised in a vertical direction, on the rear surface a back shell member of the front is formed on the back contact surface of the seated person A fitting portion fitted to the upper end of the columnar member, a locking piece engaged with the coupling member from above, and a fastener member provided near the rear surface outer periphery and coupled to a corresponding fastener member formed on the outer shell. A backrest inner shell member formed, and an outer shell that covers the shell member attached to the backrest support member from the back side with the support member interposed therebetween, and a fastener coupled to a fastener member of the shell member on a front surface thereof. consists of a outer shell forming a locking piece which engages from below to the coupling member and member, the two shell members, pillars in the back support member And coupling the member member, office chair back, characterized in that mounted to embrace from the front and rear surfaces as well as upper and lower surfaces. A back support member provided with the binding member provided with cloth columnar member and said columnar member which is raised in a vertical direction, on the rear surface a back shell member of the front is formed on the back contact surface of the seated person A backrest inner shell member formed with a locking piece engaged with the coupling member from below and a fastener member provided in the vicinity of the outer periphery of the back surface and coupled to a corresponding fastener member formed on the outer shell, and attached to the backrest support member; An outer shell for covering the shell member provided from the back side with the support member interposed therebetween, wherein a front surface of the outer shell is coupled to a fastener member of the shell member and a fitting is fitted to an upper end of the columnar member. parts and consists of a locking piece which engages from above the coupling member and the outer shell forming the said two shell members, the columnar portion of the back support member Coupling member and a office chair back, characterized in that mounted to embrace from the front and rear surfaces as well as upper and lower surfaces and.

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