JP4530515B2 - Chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chair that can be comfortably seated according to the physique of a seated person.
[0002]
[Prior art]
In general, if the depth of the seat surface of the chair is too long or too short compared to the physique of the seated person, the chair must sit in a cramped posture. Therefore, conventionally, in a chair having a seat portion and a backrest portion, by moving either the seat portion or the backrest portion back and forth, the depth direction of the seat portion can be lowered according to the physique of the seated person There is known a chair having a configuration capable of expanding and reducing the range.
[0003]
However, with such a configuration, the structure for moving the seat part and the backrest part itself becomes large and complicated, leading to an increase in the size and complexity of the entire chair structure and an increase in weight. A failure will occur. In addition, in a chair that does not have a backrest part, the depth of the seating surface cannot be changed depending on the structure as described above. Therefore, if the chair does not match the physique of the seated person, a tight sitting comfort is strong. In order to avoid such problems, a chair corresponding to the physique of the individual seated person must be obtained. Therefore, there is a demand for a chair that can easily change the depth dimension of the seating surface in the seat portion according to the seated person regardless of the presence or absence of the backrest portion.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to construct a chair that can easily change the depth dimension of the seat surface according to the physique of the seated person by improving the structure at the front end of the seat.
[0005]
[Means for Solving the Problems]
That is, the chair of the present invention includes a seat portion having a seat surface for a seated person to sit on, and a movable portion that operates to change the depth dimension of the upper surface of the front end portion at the front end portion of the seat portion. And the movable part is driven so that the depth dimension of the entire seating surface can be changed, and the seating part is a flexible deformable seat with the seating surface set on the upper surface. A main body and a support member that supports the seat main body and can bend the front end downward or rearward, wherein the front end of the seat main body and the support member is set as the movable portion, and the support member is curved. The front end of the seat body can be bent integrally with the support member in correspondence with the support member, the front end of the support member is bent downward, and the front end of the front end is not bent. Position below the member The end of the seat including its tip is formed in the shape of a string or belt, attached to one end of a traction tool wound around a drive device located below the seat, and the seat is operated by operating the drive device. The seat portion is curved , and the seat portion loosens the traction of the traction tool wound around the drive device and increases the depth dimension of the seat surface in a state where one end portion of the traction tool is moved forward. characterized in that there.
[0006]
If the chair is configured as described above, regardless of whether or not the chair has a backrest portion, if the movable portion formed on the front end portion of the seat portion is operated according to the physique of the seated person, the seat surface Therefore, the seated person can sit comfortably.
[0007]
Moreover, it is preferable that the said drive device can set arbitrarily the appropriate state between the state which curved the said movable part largely, and the state which does not curve this movable part largely .
[0008]
In this case, in order to be able to bend appropriately while maintaining the support strength of the support member with respect to the seat body, a plurality of slits extending in the width direction of the seat portion are formed at least at the front end portion of the support member, and these It is preferable that the slits are continuously arranged in the front-rear direction.
[0009]
[0010]
[0011]
[0012]
[0013]
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0015]
<Embodiment> A chair A according to this embodiment shown in FIGS. 1 and 2 includes a seat portion 1 for a seated person to sit on and a backrest portion 5 for leaning the back, and supports them to ground on the floor surface. The structure is supported by the body 6. Note that the backrest 5 and the support 6 are the same as those in the related art, and thus the description thereof is omitted.
[0016]
Hereinafter, the seat portion 1 will be specifically described. The seat portion 1 includes a seat body 2 having flexibility and cushioning properties, and a support member 3 that supports the seat body 2. The seat body 2 is formed in a flat plate shape provided with upholstery fabric (not shown), and the upper surface thereof is set as the seat surface S. On the other hand, the support member 3 is made of a synthetic resin that extends back and forth on the back side of the seat body 2 so that at least the front end portion 31 has elasticity. A plurality of slits 32 extending in the width direction of the seat body 2 are formed on the downward surface of the front end portion 31, and the slits 32 are continuously arranged in the front-rear direction. Further, the front end portion 31 of the support member 3 is gently curved downward, and one end portion 41a of a traction tool 41 having a string shape or a belt shape is attached to the tip end 31a. The other end portion 41 b of the traction tool 41 is attached to the driving device 4 provided at an appropriate position below the seat body 2. The driving device 4 includes a winding mechanism (not shown) inside. When the driving device 4 is operated, the traction tool 41 wound around the driving device 4 is wound by the winding mechanism. It should be noted that the front end 21 of the seat body 2 is similarly bent along with the bending at the front end 31 of the support member 3.
[0017]
Therefore, when the driving device 4 is operated, the front end portion 31 of the support member 3 drawn backward by the traction tool 41 is further drawn backward against the elasticity, and the seat body 2 attached to the support member 3 is also Along with this, it will bend further backwards. In this embodiment, the front end portion 21 of the seat body 2 and the front end portion 31 of the support member 3 that operate so as to be bent in a roll shape are set as the movable portion X1. In addition, since the support member 3 forms the some slit 32 in the downward surface in the front-end part 31, it can be curved easily without difficulty. And if the winding state of the traction tool 41 by the drive device 4 is cancelled | released, since the support member 3 will return to an original state with the elasticity, the seat main body 2 will also be in an original state according to it. As a result of the operations of the seat body 2 and the support member 3, when the seated person is relatively large in size, the support member 3 pulls the traction tool 41 as shown in FIG. 1 (solid line) and FIG. It is only necessary to secure a large depth dimension of the seating surface S without winding the driving device 4 and largely bending the movable portion X. On the other hand, when the physique of the seated person is relatively small, FIG. ) And FIG. 2 (b), the support member 3 is greatly bent backward by the traction tool 41, and the depth dimension of the seating surface S may be reduced. In addition, if the drive device 4 is locked in an appropriate state between the state shown in FIG. 2A and the state shown in FIG. 2B, the depth dimension of the seat surface S may be arbitrarily set. Can do.
[0018]
Thus, according to the present embodiment, the seating is performed by changing the degree of curvature of the movable portion X including the front end portion 21 of the seat body 2 and the front end portion 31 of the support member 3 by operating the driving device 4. Since the depth dimension of the seating surface S that allows the person to sit down substantially can be changed according to the physique, it is possible to sit comfortably without being cramped. In addition, since the change in the depth dimension of the seat surface S is based only on the deformation of the front end portion of the seat portion 1, it affects the rear end portion from the center portion of the seat surface S that mainly receives the load of the seated person. Therefore, the seated person can change the depth dimension of the seating surface S while sitting.
[0019]
<Reference form> Hereinafter, an example different from the present invention of a chair capable of easily changing the depth dimension of the seating surface will be described. The chair B according to the reference form shown in FIG. 3 and FIG. 4 is provided with a seat part 110 for a seated person to sit on and a backrest part 150 for leaning the back, as in the above-described embodiment, and grounds them to the floor surface. It is the thing of the structure supported by the support body 160 which does. In addition, description about the backrest part 150 and the support body 160 is abbreviate | omitted similarly to the said embodiment.
[0020]
Hereinafter, the seat 110 will be specifically described. The seat portion 110 includes a fixed portion 120 that constitutes the central portion and the rear end portion thereof, and a movable portion 130 that constitutes the front end portion. Further, the fixing portion 120 includes a thick seat body 121 having cushioning properties provided with a stretched fabric (not shown) around a core made of a urethane material, and a fixing support portion 122 that supports the seat body 121. It is composed. The upper surface of the seat body 121 is set as a fixed seat surface 121 s constituting the central portion and the rear end portion of the seat portion 110. The fixed support portion 122 includes a pair of rail members 123 having a prism shape extending along both side end portions on the back surface side of the seat main body 121. On the other hand, the movable portion 130 includes a movable seat element 131 made of a thin cloth having a width dimension substantially corresponding to the seat body 121, a movable support portion 132 that supports the movable seat element 131, and a front end portion of the movable support portion 132. And a support member 134 for supporting the front end portion of the movable seat element 131 and maintaining its shape retention. The upper surface of the movable seat element 131 is set as a movable seat surface 131s constituting the front end portion of the seat surface S1. The movable support part 132 is composed of a pair of sliders 133 in the form of square pipes attached to both side ends on the back surface side of the movable seat element 131, and a support material 134 is attached across the front end parts of both sliders 133. ing. The inner dimension of the slider 133 is set to be slightly larger than the outer dimension of the rail member 123, and the front end portion 123a of the rail member 123 is inserted from the rear end portion 133a side of the slider 133. The rail member 123 and the slider 133 constitute a guide mechanism Y that can be guided by the rail member 123 to slide the slider 133 back and forth in a telescopic manner. In order to set the movable range of the slider 133 so that the slider 133 does not fall off the rail member 123, a stopper (not shown) is provided at an appropriate portion. Further, with the rail member 123 inserted into the slider 133, the movable seat element 131 is placed so as to overlap the fixed seat surface 121s of the seat body 121, and between the fixed seat surface 121s and the movable seat surface 131s. The seating surface S1 of the seat 110 is formed.
[0021]
Therefore, as shown in FIG. 3 (solid line) and FIG. 4A, when the slider 133 is positioned forward along the rail member 123, the movable seat element 131 is also positioned forward corresponding to the movable seat element 131. Since the portion where the seat main body 121 overlaps becomes small, as a result, a large depth dimension of the seating surface S1 can be secured, and a seated person with a large physique can sit comfortably. When the slider 133 is moved from that position, and the slider 133 is positioned rearward along the rail member 123 as shown in FIG. 3 (imaginary line) and FIG. 4B, the movable seat element 131 is also moved rearward accordingly. Therefore, the portion where the movable seat element 131 and the seat body 121 overlap with each other increases, and as a result, the depth dimension of the seating surface S1 is reduced, so that a seated person with a small physique can sit comfortably. .
[0022]
According to the chair B of this preferred embodiment, it is moved back and forth relative to the fixed portion 120 by guiding the movable portion 130 to the guide mechanism Y, readily depth of the seat surface S1 in accordance with the physique of the seated person Can be changed. In particular, the central portion and the rear end portion of the seat portion 110 that mainly receives the load of the seated person are the fixed portion 120 including the seat body 121 and the fixed support portion 122, and the load is applied as much as the fixed portion 120. Since the part constituting the front end portion of the non-sitting portion 110 is a movable portion including the movable seat element 131 and the movable support portion 132, the seating person can sit in the posture without sitting up and the depth of the seat surface S1. The dimensions can be changed. Further, since the guide mechanism Y is formed between the fixed support portion 122 and the movable support portion 132, the movable portion 130 can be appropriately operated without affecting the sitting comfort.
[0023]
More specifically, the guide mechanism Y is guided to the rail member 123 while housing the rail member 123 constituting the fixed support portion 122 and the movable support portion 132 so that the rail member 123 protrudes relatively. Since the slider 133 is slid back and forth in a telescopic manner, the depth of the seating surface S1 can be changed by moving the movable portion 130 back and forth with a very simple configuration. In addition, at that time, the movable seat element 131 is made of a thin cloth so as to overlap the seat body 121 in the process of moving the slider 133 back and forth, so that the fixed seat surface 121s set on the upper surface of the seat body 121 and the movable seat There is almost no step between the movable seat surface 131s set on the upper surface of the element 131, and a substantially continuous seat surface S1 is formed, so that a comfortable seating feeling without discomfort can be realized. .
[0024]
The present invention is not limited to the embodiment described above, for example, to form the movable support to the front portion of the seat, the fixed support portion is formed over the rear end portion from the central portion, the seat by their movable support and the fixed support part Support the common upholstery that forms the surface, and change the depth dimension of the seating surface by moving the movable support part back and forth relative to the fixed support part and expanding and contracting in the front and back direction. Can also be configured. In the reference embodiment, the movable seat element constituting the front end portion of the seating surface is not overlapped with the seat body, but the movable seat element having flexibility corresponding to the back and forth movement of the movable support portion is appropriately wound. Thus, the depth dimension of the seating surface may be changed. Further, the movable portion formed at the front end portion of the seat portion, the curved configuration of the objects or the like of the embodiment, in addition to those of the configuration for sliding movement as the reference embodiment, a stretchable configurable in the longitudinal direction You can also
[0025]
Furthermore, the chairs of the respective forms described above are provided with a backrest portion. However, as described above, since the change in the depth dimension of the seating surface is based only on the configuration of the seating portion, the chair has a backrest portion. The effect similar to what was mentioned above can be acquired also about the chair which does not. Other, not limited to the above embodiments also specific configuration of each part, there may be various modifications without departing from the scope of the present invention.
[0026]
【The invention's effect】
The present invention is implemented in the form as described above, and has the effects described below.
[0027]
That is, according to the chair of the present invention, the depth of the seating surface can be easily changed according to the physique of the seated person by operating the movable part formed at the front end part of the seat part, so that the user can sit comfortably. It is possible. And since such an effect is based only on the structure of the seat part of a chair, it can show | play regardless of whether this chair is provided with the backrest part.
[0028]
[0029]
[0030]
[0031]
[0032]
[0033]
[0034]
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of the present invention.
FIG. 2 is an operation explanatory view schematically showing the embodiment in a side view state.
FIG. 3 is a perspective view showing a reference form of a chair that can change the depth dimension of the seating surface .
FIG. 4 is an operation explanatory view schematically showing the reference embodiment in a side view state.
[Explanation of symbols]
A, B ... Chair S, S1 ... Seat surface X ... Movable part Y ... Guide mechanism 1, 110 ... Seat part 2, 121 ... Seat body 3 ... Support member 21 ... Front end part 31 ... Front end part 32 ... Slit 120 ... Fixed part DESCRIPTION OF SYMBOLS 122 ... Fixed support part 123 ... Rail member 130 ... Movable part 131 ... Movable seat element 132 ... Movable support part 133 ... Slider

Claims (3)

A seat portion having a seat surface for a seated person to sit on is formed, and a movable portion that operates to change the depth dimension of the upper surface of the front end portion is formed at the front end portion of the seat portion, and the movable portion is It is configured so that the depth dimension of the entire seating surface can be changed by driving,
The seat includes a seat body having a seat surface on the upper surface and a deformable seat body, and a support member that supports the seat body and can bend the front end downward or rearward. The front end portion of the support member is set as the movable portion, and the front end portion of the seat body can be bent integrally with the support member corresponding to the curvature of the support member.
The front end portion of the support member is curved downward, and the front end portion of the support member is positioned below the non-curved support member,
At the leading edge of the seat including its tip, it forms a string or belt, and attaches one end of a traction tool wound around a drive device located below the seat,
By curving the front end of the seat by operating the drive device ,
The seat is characterized in that the depth of the seat surface is increased in a state where the traction of the traction tool wound around the drive device is loosened and one end of the traction tool is moved forward . The chair according to claim 1, wherein the driving device can arbitrarily set an appropriate state between a state in which the movable part is largely curved and a state in which the movable part is not largely curved. The chair according to claim 1 or 2, wherein a plurality of slits extending in the width direction of the seat portion are formed in at least a front end portion of the support member, and these slits are continuously arranged in the front-rear direction.

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