JP2000342377A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair with the rocking function to be maintained easily, enabling a user to sit on the chair comfortably with a very simple structure without using a complicated link mechanism or a rotation shaft. SOLUTION: This chair 1 has the chair main body 2 with the backpart 21 and the seat part 22. Elastically deformable parts X, Y and 23 are integrally formed at least in a part of the chair main body 2, so that the chair main body 2 can rock by the elastic deformation of the parts. And an auxiliary elastic material 3 is interposed between such two points as the distance between them is expanded/contracted by the deformation, so that the elastic force of the chair main body 2 and that of the auxiliary elastic material 3 are made to cooperate with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair capable of performing a rocking operation and providing a comfortable sitting comfort.

[0002]

2. Description of the Related Art Heretofore, it has been known that a chair is provided with a locking function by mainly using a link mechanism, a rotating shaft or the like. In such a chair, in order to obtain a comfortable sitting comfort according to the movement of the occupant, the link mechanism and the like are frequently used so that they are complicatedly related.

[0003]

However, in such a device, pursuing the comfort of sitting comfort of the occupant is directly linked to the complexity of the link mechanism and the like. As the complexity increases, there arises a problem that the number of parts and the cost increase. Also,
There is also a problem that maintenance of those mechanisms cannot be easily performed.

On the other hand, in view of such a problem, in order to simplify the calibration and reduce the cost, the back seat is formed integrally with an elastically deformable resin member or the like, and locking is performed by utilizing the elastic deformation. Some are known. However, in this case, the strength of rocking etc. is determined by the shape and material of the chair body, and if you try to have various chairs with different rocking strengths, you will have to prepare multiple molds and materials etc. , The burden on production increases.

[0005]

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a chair body that can be elastically deformed and an auxiliary elastic body that can limit the deformation of the chair main body, thereby providing a complicated link mechanism and the like. A chair having a rocking function that allows a seated person to obtain a comfortable sitting comfort with an extremely simple configuration without using a rotating shaft or the like and that is easy to maintain.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A chair according to the present invention comprises a chair body having a back portion and a seat portion, and at least a part of the chair body is provided with an elastically deformable portion integrally therewith.
The chair body can be locked by its elastic deformation, and auxiliary elastic bodies are interposed at two points where the distance between the chair bodies expands and contracts by the deformation.

In such a case, first, an elastic deformation portion is provided on at least a part of the chair body, and the chair can be provided with a locking function by the elasticity of the chair body itself. However, with such a configuration alone, it is difficult to adjust the strength of the rocking since the bending due to the elastic deformation of the chair main body is unique to the material and shape of the chair main body. Therefore, in addition to such a configuration, the present invention interposes an auxiliary elastic body at a position where the distance between the two expands and contracts due to the elastic deformation of the chair main body, thereby providing the elastic force of the chair main body itself and the elasticity of the auxiliary elastic body. Since the force and the force cooperate with each other, it is possible to configure chairs having various rocking strengths by arranging the auxiliary elastic bodies having different elastic forces even when the chair body having the same configuration is used. . That is,
The rocking strength can be varied so that a seated person can obtain a comfortable sitting comfort. In addition, since such a configuration does not require a complicated link mechanism or the like for the chair locking function, the number of parts and cost can be reduced, and maintenance can be facilitated.

In such a configuration, in order to increase the degree of freedom in designing the mounting position of the auxiliary elastic body and to stably support the chair body, the chair body is integrally formed with the front end of the seat. It is desirable to provide a mounting portion extending continuously rearward and downward, and to mount the mounting portion to a support portion that supports the load of the chair body. In this case, as a specific mounting position of the auxiliary elastic body, one in which one end of the auxiliary elastic body is attached to the support portion and the other end is attached to a boundary portion between the back portion and the seat portion. No. In this way, the stroke of the auxiliary elastic body is increased,
The area where the chair body can be rocked can be made large, and the auxiliary elastic body can be made less noticeable to the outside.

Further, in order to improve the cushioning property of the chair at the time of sitting and to enable the back and the seat to be integrally locked, an elastic deformation portion is provided at a boundary portion between the seat and the mounting portion. It is desirable to set the elastic deformation portion at the boundary between the back and the seat in order to properly lock the back alone. In addition, in order for the chair to move up and down when seated to further improve the cushioning property, it is preferable that the mounting portion be an elastic deformation portion so that the mounting portion itself can be elastically deformed.

In order to limit the angle of rocking to a constant value, it is effective to provide the chair with a restricting means for restricting the elastic deformation of the auxiliary elastic body to a constant amount. If it is not desired to lock the chair according to the occupant's preference, it is effective to provide the chair with locking means for inhibiting elastic deformation of the auxiliary elastic body. In the above configuration, when the chair main body is formed by integrally molding a synthetic resin material, the chair main body can be easily manufactured, and it is easy to impart elasticity to the chair main body as a whole. Become. Further, preferred specific examples of the auxiliary elastic body such that the strength of the locking can be appropriately adjusted include a spring, rubber, or a gas spring.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, a chair 1 of this embodiment mainly includes a support 4, an elastically deformable chair body 2 attached to an upper end 4 a of the support 4, and a lower end 4 of the support 4.
b. In addition to these, an auxiliary elastic body 3 that can adjust the strength of the rocking of the chair body 2 is provided.

As shown in FIGS. 1 and 2, the support 4 is made of, for example, a steel pipe which directly supports the load of the chair body 2 and has an upper end 4a at the upper end 4a.
Is mounted by an appropriate means. The mounting base 41 has a substantially sector shape substantially corresponding to the shape of the lower end of the chair body 2, has a hollow interior, is opened forward, and has a lower wall 41c protruding forward longer than an upper wall 41d. , So that the whole is inclined rearward and the rear end 41a
Is rotatably attached to the upper end 4 a of the support 4. That is, the chair 1 of the present embodiment is a rotating chair in which a chair body 2 described later and the mounting table 41 are both horizontally rotated with respect to the column 4.

At the lower end 4b of the column 4, as shown in FIG. 1, there is provided a leg portion 5 composed of five leg blades 51 whose base ends are gathered at the lower end 4b and whose distal ends extend radially. are doing. A rollable caster 52 is attached to each end of the leg blades 51, and supports the entire chair 1 stably and movably. As shown in FIGS. 1 and 2, the chair body 2 has a back 21 and a rear end 2 at a lower end 21 a of the back 21.
The mounting portion 23 is made of a synthetic resin material and integrally formed with a seat portion 22 having a continuous 2a and a mounting portion 23 having a front end 23a continuous with a front end 22b of the seat portion 22 and extending downward afterward.
The rear end 23b is rotatably mounted on the upper end 4a of the column 4 via the mounting base 41. The back portion 21 is formed into a gentle S-shape as a whole so as to be curved backward once from its lower end 21a to its upper end 21b, and then further curved forward. ing. The seat portion 22 is gently inclined forward, and the front end 22b is smoothly connected to the front end 23a of the mounting portion 23. The seat portion 22 that tilts forward and the mounting portion 23 that tilts rearward form a rearward portion. Side view V gradually expanding toward
A space in the shape of a letter is formed. And the mounting part 23
The rear end 23b of the mounting base 41 is inserted into the hollow interior of the mounting base 41, and is attached to the column 4 so as to be sandwiched between the upper wall 41d and the lower wall 41c of the mounting base 41. And back 2
The chair body 2 can be mainly elastically deformed at a boundary portion X where the seat 1 and the seat portion 22 are continuous and at a boundary portion Y where the seat portion 22 and the mounting portion 23 are continuous. It has a role as an elastic deformation part. That is, the back portion 21 is locked by the chair body 2 being largely elastically deformed at the boundary portion X, and the back portion 21 and the seat portion 22 are integrally locked by being greatly elastically deformed at the boundary portion Y. . Further, in this embodiment, the mounting portion 23 itself also plays a role as an elastic deformation portion, and its front end 23a is elastically deformed so as to rotate around the front end 41b of the mounting base 41 as a fulcrum. When the load of the occupant acts on the seat portion 22 due to the interaction between the movement of the seat portion 22 and the elastic deformation of the boundary portion Y, the entire chair body 2 can also move up and down. At this time, the lower wall 41c is positioned forward of the upper wall 41d so that the mounting portion 23 is not sandwiched between the front ends of the upper wall 41d and the lower wall 41c of the mounting base 41 at the same position in the height direction. It is extended to prevent the bending stress from being concentrated on one portion of the mounting portion 23. A cushion member 24 is detachably attached to the seat surface of the seat portion 22. Further, armrests 25 projecting forward are attached to both side edges of the back 21 by appropriate means.

In addition to such a structure, the present embodiment, as shown in FIGS. 1 and 2, has a back portion 21 and a seat portion 22 at two points where the distance between them is expanded and contracted by the elastic deformation of the chair body 2.
Both ends of the auxiliary elastic body 3 are respectively attached to a boundary portion X between the support elastic body 3 and an upper end 4a of a support column 4 which is a support portion of the chair main body 2 located almost directly below. The auxiliary elastic body 3 includes a spring 3
1 and an outer cylinder 32 containing the spring 31 therein. When the occupant sits down on the seat portion 22 and leans on the back portion 21 to lock the chair body 2, the spring 31 is compressed and the back portion 21 is compressed.
The spring 31 is configured to extend when the load applied to the seat and the seat portion 22 is released. That is, only the elasticity of the chair body 2 itself causes the range of locking of the chair body 2 to be unique due to its material, shape, and the like, and the strength of the locking may not be preferable depending on the occupant, By providing the auxiliary elastic body 3 having an elastic force according to the preference of the seated person, the strength of the locking can be appropriately adjusted. Further, the auxiliary elastic body 3
The spring 31 and the outer cylinder 32 are formed by rotating the outer cylinder 32 so that a seated person can select between a state in which the chair main body 2 can be locked and a state in which the chair body 2 is fixed as desired. Locking means L for preventing expansion and contraction of 31
It constitutes.

Accordingly, when a person sits on the chair 1 of this embodiment, the chair body 2 is elastically deformed at the boundary Y between the seat portion 22 and the mounting portion 23 as shown by the imaginary line in FIG. The part 23 rotates while turning downward about the vicinity of the front end 41b of the mounting table 41, and pushes down the entire chair body 2 as indicated by the arrow in the figure. Further, when the occupant leans on the back 21, the chair body 2 is moved to the back 21 and the seat 2.
2 also elastically deforms at the boundary X, and tilts backward as shown by the arrow in FIG. The chair body 2
Operates, the auxiliary elastic body 3 is pressed in the compression direction, and the repulsive force is accumulated. Then, the cooperation between the repulsive force and the elastic force of the chair body 2 itself causes the chair body 2 to be properly locked.

With the above-described configuration, the chair 1 of the present embodiment is configured such that the whole of the chair body 2 is integrally formed, the whole of the chair body 2 functions as an elastic deformation portion, and a part of the chair body 2 is particularly greatly elastically deformed. In addition to providing the rocking function, the auxiliary elastic body 3 is interposed at two points at which the distance between the two expands and contracts due to the elastic deformation of the chair body 2, so that the elastic force of the chair body 2 The rocking strength is made appropriate by cooperation with the elastic force of the elastic body 3, so that comfortable locking is realized by selecting the auxiliary elastic body 3 having an elastic force suitable for the occupant. Is what you can do. Therefore, even if the chair main body 2 having the same configuration is used, the auxiliary elastic body 3 having an appropriate elastic force can be applied, and the locking strength can be varied. Further, since such a configuration does not require a complicated link mechanism or the like for locking the chair 1,
The number of parts and cost can be effectively reduced, and maintenance can be greatly simplified.

Further, the front end 22 of the seat 22 is
b, a mounting portion 23 that extends continuously rearward and downward from the support portion 4 and is directly supported by the support 4 as a support portion.
Since a space is formed between the auxiliary elastic member 3 and the space 3, the space where the auxiliary elastic body 3 can be disposed can be appropriately secured. Then, by effectively utilizing such a space, one end of the auxiliary elastic body 3 is attached to the upper end 4a of the column 4,
Since the other end is attached to the boundary portion X between the back part 21 and the seat part 22, the chair body 2 can be locked by taking a large stroke of the auxiliary elastic body 3 while making the auxiliary elastic body 3 inconspicuous from the outside. The area can be increased, and the degree of freedom in design can be increased.

Further, the chair body 2 is divided into a back portion 21 and a seat portion 2.
2 is set as the elastically deformable portion, and both the boundary portion X between the seat 2 and the seat portion 22 and the back portion 21 are set as the elastically deformable portions.
The locking function of the back 21 and the back 21 and the seat 2
The locking function in which the two are integrated can be provided with an extremely simple configuration. In addition, the mounting portion 23
Also has itself as an elastically deformable portion, so that the chair body 2 moves up and down as a whole when a seated person sits down,
Comfortable cushioning properties can be obtained. In addition, by doing so, it is possible to prevent the front end side of the seat portion from moving upward and to apply a load to the thigh of the seated person.

Further, in the chair 1 of the present embodiment, the auxiliary elastic body 3 comprises a spring 31 and an outer cylinder 32 for accommodating the same.
Since the lock means L is provided to prohibit the expansion and contraction of the spring 31 only by rotating the outer cylinder 32, the locking state and the fixed state of the chair body 2 can be selectively operated according to the occupant's preference. Can also. Further, since the chair body 2 is integrally formed of a synthetic resin material, the chair body 2 can be easily manufactured, and the chair body 2 can easily have elasticity as a whole.

The structure of the chair according to the present invention is not limited to the above embodiment. For example, if it is desired to increase the stroke of the auxiliary elastic body to further increase the locking area, one end of the auxiliary elastic body is attached to a part of the back, and the other end is part of a support. You may make it attach to. Further, it may be a chair like the one shown in FIG. That is, this chair 101
The mounting portion 123 is not formed integrally with the chair seat portion 122, but is formed by attaching the upper end 123 a to a substantially central portion of the lower surface of the seat portion 122 and bending the mounting portion 123 into a substantially rectangular shape.
Reference numeral 3 denotes a boundary portion Y2 with the seat portion 122, which is an elastically deformable portion which is elastically deformed in the front-rear direction as indicated by an arrow in FIG. Then, the seat part 122 and the support 104 are formed in a substantially T-shape via the mounting part 123, and the back part 121 is formed.
X2 of the support 104 and the upper end 10 of the support 104
The auxiliary elastic body 103 is arranged between the auxiliary elastic body 103 and the support 4a. Even with the chair 101 having such a configuration, the back 121 and the seat 1
By making the boundary portion X2 between the back portion 121 and the seat portion 122 elastically deformed at the boundary portion Y2 between the seat portion 122 and the mounting portion 123, the back portion 121 can be locked independently. The part 122 and the chair body 10 are locked together.
The elastic force of the elastic member 103 and the elastic force of the elastic body 103 cooperate with each other, so that the chair 101 can perform an appropriate locking operation.

In addition, the auxiliary elastic body is not only a spring,
Needless to say, rubber or gas spring may be used. Further, a restricting means for restricting the elastic deformation of the auxiliary elastic body in a certain range may be provided so as to restrict the angle of the rocking of the chair body to a constant value. The auxiliary elastic body may be fixed in that state to obtain a seating posture according to the preference of the seated person. Further, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0022]

The present invention is embodied in the form described above and has the following effects. That is, in the chair of the present invention, since the chair body having the back and the seat has the elastically deformable portion provided at least in a part thereof, the chair can easily be provided with the locking function. With such a configuration, the strength of the locking is unique to the material of the chair body and the like, but in the present invention,
In addition to such a configuration, the auxiliary elastic body is interposed at two points where the distance between them changes due to the elastic deformation of the chair main body. The rocking strength is made appropriate by cooperating with the elastic force. That is, even if the chair body having the same configuration is used, if the elastic body is appropriately selected as the auxiliary elastic body, it is possible to adjust the rocking strength so that the occupant can obtain comfort. In addition, with this configuration, it is possible to provide the chair with variations in the strength of locking. Therefore, the present invention can have a locking function that enables a seated person to obtain a comfortable sitting comfort with an extremely simple configuration without using a complicated link mechanism or a rotating shaft. This allows
Not only can the number of parts and costs involved in locking the chair be effectively reduced, but also maintenance can be made extremely simple.

In addition to the above configuration, the chair body is provided with an attachment portion attached to a support portion for supporting the load of the chair body extending continuously and rearward downward integrally with the front end of the seat portion. Thus, a space in which the auxiliary elastic body can be attached between the seat portion and the attachment portion can be effectively formed.
Further, the degree of freedom in designing the position where the auxiliary elastic body is mounted can be improved. In this case, particularly, if one end of the auxiliary elastic body is attached to the support portion and the other end is attached to the boundary between the back portion and the seat portion, the auxiliary elastic body is made inconspicuous from the outside, Since the stroke of the auxiliary elastic body can be made very large, the area that can be locked can be made large.

Further, if the elastically deformable portion is set at the boundary between the seat and the mounting portion, cushioning at the time of seating can be enhanced. Can be properly locked. In this case, if the chair body is elastically deformed at the boundary portions, a more comfortable state in which the seat and the back are integrally locked can be realized. Further, if the mounting portion itself is set as an elastic deformation portion, the chair body can be moved up and down as a whole by the elastic deformation, and the cushioning property at the time of sitting can be further improved.

When a regulating means for regulating the elastic deformation of the auxiliary elastic body to a certain amount is provided, the locking angle can be restricted to a constant value, and the elastic deformation of the auxiliary elastic body is prohibited. When a locking means is provided, it is possible to select between a state in which the chair body can be locked and a state in which the chair body is locked according to the preference of the seated person.

Furthermore, if the chair body is made of a synthetic resin material, it can be easily manufactured, and the chair body itself can be easily elasticized. In the chair as described above, if the auxiliary elastic body is formed of a spring, rubber, a gas spring, or the like, the above-described effects can be easily and appropriately exerted.

[Brief description of the drawings]

FIG. 1 is a rear perspective view showing one embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing the operation of the embodiment, partially omitting and enlarging the operation.

FIG. 3 is a schematic side view showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 101 ... chair 2, 102 ... chair main body 3, 103 ... auxiliary elastic body 4, 104 ... support part (post) 21, 121 ... back part 22, 122 ... seat part 23, 123 ... mounting part (elastic deformation part) X .., Y, X2... Boundary part (elastic deformation part) L.

Claims (10)

[Claims] A chair body having a back portion and a seat portion, wherein at least a part of the chair body is integrally provided with an elastic deformation portion so that the chair body can be locked by the elastic deformation. A chair characterized in that an auxiliary elastic body is interposed at two points such that the distance between the two expands and contracts due to the deformation. 2. The chair main body further comprises a mounting portion extending continuously rearward and downward integrally with a front end of the seat portion.
The chair according to claim 1, wherein the chair is attached to a support portion that supports a load of the chair body. 3. The chair according to claim 2, wherein one end of the auxiliary elastic body is attached to the support portion, and the other end is attached to a boundary portion between the back portion and the seat portion. . 4. The chair according to claim 1, wherein the elastically deforming portion is set at a boundary between the seat portion and the mounting portion. 5. The chair according to claim 1, wherein said elastically deformable portion is set at a boundary between a back portion and a seat portion. 6. The chair according to claim 2, wherein the mounting portion itself is an elastic deformation portion. 7. The chair according to claim 1, further comprising regulating means for regulating elastic deformation of said auxiliary elastic body to a fixed amount. 8. The apparatus according to claim 1, further comprising a lock means for inhibiting elastic deformation of said auxiliary elastic body.
The chair according to 3, 4, 5, 6 or 7. 9. The chair body according to claim 1, wherein the chair body is formed by integrally molding a synthetic resin material.
The chair according to 4, 5, 6, 7 or 8. 10. The apparatus according to claim 1, wherein said auxiliary elastic body is a spring, rubber or gas spring.
The chair according to 4, 5, 6, 7, 8 or 9.