JPH06209829A - Lumbago preventive chair - Google Patents

Abstract

PURPOSE:To constitute a chair so that the sense of incompatibility such as numbness and fatigue is decreased even if it is used for many hours, and it is useful also for the remedy of an axis center, etc., of a human body by providing a hucklebone supporting member subjected to vertical driving or inclined driving through a driving device in two suitable parts of a seat part. CONSTITUTION:A pair of left and right hucklebone supporting members 9a, 9b controlled by the driving of a driving device 8 are provided, and on its upper face, recessed parts 10, 10 expanded and opened upwards are formed. The inclination of the inclined surfaces 10a, 10b is set so as to run along the inclination of the lower end part of the hucklebone of a user, and set so that the hucklebone of this user is held in the recessed parts 10, 10, in the case the user is seated. On the other hand, the driving device 8 allows the hucklebone supporting members 9a, 9b to be subjected to horizontal/vertical motion, inclined vertical motion and inclined motion within a prescribed range. In such a manner the hucklebone is moved consequently in the same state as walking, while being seated on the chair 1, he scarecely feels numbness an fatigue, etc., which follow the failure of the circulation of the blood, etc., and the axis center of the human body can be remedied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various chairs such as office chairs, vehicle seat chairs, treatment chairs, and spectator chairs, and more particularly to a back pain prevention chair that is optimal when used for a long time or for treatment. It is about.

[0002]

2. Description of the Related Art In recent years, most of various chairs used for various purposes such as office chairs, vehicle seat chairs, treatment chairs, spectator seat chairs, etc. have a seat and a backrest. From the viewpoint of human body engineering (for example, body pressure distribution), the shape and the like suitable for the purpose are configured.

[0003]

However, in most of the chairs constructed as described above, how to efficiently hold the human body or relax according to the shape of the human body. Since the shape and cushioning are designed based on the above, it is possible to prevent the user from feeling numbness and tiredness for a certain period of use, but there is a limit to reducing that burden. It was happening.

The present invention has been made in view of the above circumstances. Not only can the discomfort such as numbness and tiredness be reduced even after long-term use, but it can also be applied to the correction treatment of the axial center of the human body. The purpose is to provide a back pain prevention chair that can also be used.

[0005]

In order to achieve the object, in the invention described in claim 1, the seat bone supporting member for vertically driving or tilting driving is provided at appropriate two positions of the seat portion through a driving device. Is the gist.

According to the second aspect of the present invention, a seat bone support member having recesses formed along the lower end of the seat bone is provided at appropriate two positions of the seat portion, and the seat bone support member is vertically driven by a drive device. Alternatively, the main point is to perform tilt drive.

[0007]

In the above-mentioned structure according to claim 1,
The scaffold support members provided at appropriate two positions of the seat portion are vertically driven or tilted by a driving device. As a result, it is possible to give the ischium the same motion state as walking while sitting down, to promote blood circulation and reduce the burden on the human body even when it is used for a long time. The core can be orthodontic treated.

According to the second aspect of the invention,
By vertically driving or incliningly driving the ischium support member, which has recessed portions along the lower end shape of the ischium at appropriate two positions of the seat portion, through the drive device, the recessed portions can efficiently and appropriately stimulate the ischium, Even better effects can be obtained.

[0009]

[Embodiment] Next, an embodiment of a back pain preventing chair of the present invention is shown in FIG.
It will be described with reference to FIG.

In FIG. 1, reference numeral 1 denotes a chair having a leg portion 2, a seat portion 3 and a backrest 4. The chair 1 can be adapted to the user's physique and the like by vertically moving the seat 3 by driving the leg 2 to extend and retract by a telescopic drive device (for example, a hydraulic cylinder) not shown.

As shown in FIG. 2, the seat portion 3 has a frame 5 having a predetermined shape connected to the upper ends of the leg portions 2, a pad 6 made of foam such as urethane, and a skin 7 covering the pad 6.
It has and.

In the vicinity of the backrest 4 of the pad 6, a drive device 8 for receiving power from a power supply unit (not shown) and driving it.
A pair of left and right ischium support members 9a and 9b controlled by the drive of the drive device 8 are provided.

The upper surface of the ischium supporting members 9a, 9b is shown in FIG.
As shown in (A) and (B), recesses 10 and 10 are formed to expand upward. In addition, in FIG.
The upper surfaces of the portions of the isch bone supporting members 9a and 9b excluding the recesses 10 and 10 are set to be substantially horizontal. However, the user sits on the seat portion 3 by forming the seat bone support members 9a and 9b so as to follow the seat surface of the seat portion 3. You can eliminate the feeling of strangeness.

The recesses 10, 10 have a length L1 in the front-rear direction of 7 to 12 cm and a length L2 in the left-right direction of 4 to 12, for example.
The depth L3 is set to 8 cm and the depth L3 is set to 2 to 5 cm. Further, the inclination angle of the inclined surface 10a facing forward from the vertical axis P passing through the apexes of the recesses 10, 10 is set to an ascending slope of about 20 to 40 °, and the inclination angle of the inclined surface 10b facing rearward from the vertical axis P is It is set to an ascending slope of about 30 to 55 °.
The shape and size of the recess 10 are not particularly limited.

The inclination angles of the inclined surfaces 10a and 10b are set so as to follow the inclination angle of the lower end portion of the user's ischbone S shown in FIG. The angle θ shown in FIG.
Reference numeral 1 corresponds to the inclined surface 10a, and angle θ2 corresponds to the inclined surface 10b. When the user sits down, the ischium S of the user is set to be accommodated in the recesses 10,10. .

Further, the position of the vertical axis P of the recesses 10, 10 is about 6 cm from the rear when the normal posture with the body of the user along the seat 3 and the backrest 4 is taken as a reference, in a working posture. A good position is about 11 cm from the rear. For this reason,
The recesses 10 and 10 are set so as to be adjustable in the front-rear direction within a range by a front-rear driving device (not shown).

On the other hand, the drive unit 8 includes the ischium supporting members 9a,
9b is horizontally moved up and down, tilted up and down, and tilted within a predetermined range. Further, it is also possible to move the isch bone supporting members 9a and 9b back and forth within a predetermined range while also functioning as the above-mentioned front and rear drive device.

At this time, in the case of horizontal vertical movement in which the isch bone supporting members 9a and 9b are displaced vertically while maintaining the horizontal state,
Approximately 1 to 3 cm from the fixed position (state of Fig. 5 (A)) both up and down
The upper displacement (state of FIG. 5 (B)) or the lower displacement (state of FIG. 5 (C)) is performed within the range. This vertical displacement can be performed by driving the isch bone supporting members 9a and 9b individually or simultaneously.

Further, in the case of tilting vertical movement in which the tips of the ischium supporting members 9a, 9b are vertically displaced while being tilted in the vertical direction, the front ends are 5-20 ° while being similarly displaced upward by 1 to 3 cm from a fixed position. Tilts upward within the range (Fig. 6 (A)
Condition), or tilting the front end downward within a range of 5 to 20 ° while displacing the fixed position downward by about 1 to 3 cm (Fig. 6).
(State of (B)).

The vertical displacement and vertical inclination can be performed by driving the isch bone supporting members 9a and 9b individually or simultaneously.

Further, in the case of the tilting motion in which the tips of the ischium supporting members 9a and 9b are tilted in the vertical direction, the front end is tilted upward within the range of 10 to 25 ° from the fixed position (see FIG. 7).
(State of (A)), or the front end is tilted downward within a range of 10 to 25 ° from the fixed position (state of FIG. 7B). The vertical inclination can be performed by driving the isch supporting members 9a and 9b individually or simultaneously, and the upward inclination and the downward inclination need not be the same.

Further, these drives are provided with, for example, a seat pressure detection switch and a timer means, and are driven within a predetermined time after a lapse of a predetermined time after the user sits down on the seat 3, or the user sits down. Drive all the time. Also, the speed of vertical movement can be varied.

As a result, the user is moving the ischium S in the same state as when walking while sitting on the chair 1, and even when used for a long time, numbness, fatigue, etc. due to poor blood circulation or the like. Can be less likely to feel.

The drive pattern of the drive unit 8 will be exemplified below. In addition, here, each of the left and right ischium supporting members 9a,
9b is simply represented by right and left, and the ischial support member 9
When the a and 9b are in the upward displacement (or the tip is inclined upward), the UP, the same in the downward displacement (or the tip is inclined downward) is DOWN, and the initial state is the fixed position. The order in which the support members 9a and 9b move up and down (or tilt) will be briefly described.

(Pattern 1) In this pattern 1, the right U
P ・ Left Fixed Position / Right Fixed Position ・ Left Fixed Position / Right Down ・ Left Fixed Position / Right Fixed Position ・ Left Fixed Position / Left UP ・ Right Fixed Position / Left Fixed Position ・ Right Fixed Position / Left Down ・ Right Fixed Position / It drives repeatedly in the order of left fixed position and right fixed position.

(Pattern 2) In Pattern 2, right UP / left fixed position / right fixed position / left fixed position / right fixed position / left U
P / right fixed position / left fixed position / right DOWN / left fixed position / right fixed position / left fixed position / right fixed position / left DOWN / right fixed position / left fixed position are repeatedly driven in this order.

(Pattern 3) Further, in pattern 3,
Right UP / Left DOWN / Left Home Position / Right Home Position / Right DOWN
・ Repeatly drive in the order of left UP / right fixed position / left fixed position.

(Pattern 4) Further, in pattern 3,
It drives repeatedly in the order of right UP / left fixed position / right fixed position / left fixed position / left UP / right fixed position / left fixed position / right fixed position.

In each of these patterns 1 to 4, the driving order of left and right and UP / DOWN may be reversed. Further, the left and right ischium support members 9a and 9b are temporarily stopped at a fixed position and then moved to the next drive, and the fixed position is merely a passing point, and continuous driving is performed. Not a thing.

By the way, although the chair 1 has been described as being applied to a general office chair in the above embodiment, it is used in, for example, a vehicle seat chair / wheelchair or a movie theater or a stadium. It can be applied to chairs for spectators.

Further, as shown in FIG. 8, the seat portion 13 is divided into left and right parts, and the left and right seat portions 13a, 13b are provided with recesses 10 at appropriate positions on the upper surface of the seat bone supporting member 9a,
9b is provided, and the leg portion 12 is provided through a ball joint between the rear portion on the bottom surface side of the left and right seat portions 13a and 13b and the middle portion.
a and 12b are provided respectively, and the legs, 12a and 12b are provided.
By expanding or contracting either one of
As shown in FIG. 8C from the normal state shown in FIG. 8B, the tip of either one of the left and right seats 13a and 13b (the seat 13b in the illustrated example) is tilted vertically (the leg in the illustrated example). 12
The present invention is not limited to the above-described embodiment, such as a device for correcting the axis of the human body, such as a structure in which it is inclined downward due to contraction of b).

The seat portions 13a and 13b can be arranged so as to be displaceably fixed in the front-rear direction or the left-right direction and can be of an adjustable type according to the physical constitution of the user.

[0033]

As described above, in the low back pain preventing chair of the present invention, since the seat bone supporting members that are vertically driven or tilted by the driving device are provided at appropriate two positions of the seat portion, Not only is it possible to reduce discomfort such as numbness and tiredness during use over time, but it can also be useful for corrective treatment of the axial center of the human body.

[Brief description of drawings]

FIG. 1 (A) is a perspective view showing the outer appearance of a back pain preventing chair of the present invention, and FIG. 1 (B) is a side view thereof.

FIG. 2 is a sectional view of a seat portion.

FIG. 3A is a plan view of the ischium supporting member, and FIG. 3B is a sectional view of the same.

FIG. 4 is a schematic side view of the ischium.

FIG. 5 is an explanatory diagram showing horizontal up and down movement of the ischium support member.

FIG. 6 is an explanatory diagram showing tilting vertical movement of the ischium supporting member.

FIG. 7 is an explanatory view showing tilting movement of the ischium supporting member.

FIG. 8 shows another example of the low back pain prevention chair of the present invention, (A) is a plan view of the seat, (B) is a side view of the seat, and (C) is a state in which one of the seats is inclined. It is a side view of a seat part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Chair 3 ... Seat part 8 ... Drive device 9a ... Ischium support member 9b ... Ischbone support member 10 ... Recessed part

Claims (2)

[Claims] 1. A chair for preventing back pain, comprising isch bone supporting members that are vertically driven or tilted via a drive device at appropriate two positions of a seat portion. 2. A seat bone supporting member having recesses formed along the lower end of the seat bone is provided at appropriate two positions of the seat portion, and the seat bone supporting member is vertically driven or tilted by a driving device. Low back pain prevention chair.