JPH0522526B2 - - Google Patents

Description

Detailed Description of the Invention This invention not only allows the seat plate and the backrest to interlock, but also has an extremely wide range of interlocking using each support shaft of the seat plate and the backrest as a fulcrum. The movement of each of the sub-body of the footrest and the headrest can be adjusted by the user's operation.
The present invention also relates to a flexible chair suitable for elderly and infirm people, in which the footrest moves in and out when changing the inclination angle of the footrest and the sub-body of the footrest.

Conventionally, easy chairs such as those disclosed in Japanese Patent Application Laid-open No. 56-148309, dental chairs such as those disclosed in Japanese Patent Application Publication No. 58-218959, and barber chairs used in barber shops have been known.

However, easy chairs are used for resting, dental chairs are used for dental treatment, and barber chairs are used for hair styling, etc., and are not used for normal office work or during work. It cannot be used for rest.

For example, in the above-mentioned easy chairs, dental chairs, and barber chairs, even if the degree of inclination of the backrest is satisfactory, the degree of inclination and extension of the footrest is extremely small, and the seat plate is fixed, so sometimes The disadvantage was that it was not possible to obtain an appropriate inclination.

Furthermore, elderly and sickly people often have difficulty getting up from an easy chair with the backrest reclined. It also had the disadvantage of not having a function that would have made it easier to stand up by raising the rear of the seat plate a little while leaving it as it was.

This invention eliminates the above-mentioned drawbacks and also
The purpose is to provide a flexible chair that has versatility in usage and is easy to use.

Next, to specifically illustrate diversity, the fifth
It will look like the figure.

That is, Fig. 5-1 shows the office status, and Fig. 5-2 shows the office status.
The figure shows an office or reading state, Figure 5-3 shows a reading state,
Figure 5-4 is reading and watching TV, Figure 5-5
Figures 5 and 5-6 show the resting state, and Figures 5-7 show the state when standing up.

Figures 4A to 4B and Figures 5-1 to 5-7
A ₀ in the diagram indicates the standard position, with seat plate 2 and backrest 3
The locus diagram when the seat plate 2 is moved without changing the angle between them is A ₁ , A ₂ , and A ₃ , where A ₁ corresponds to Figure 5-3 and A ₂ corresponds to Figure 5-3. 1 and 5-2, and _A3 corresponds to FIG. 5-7, respectively.

In addition, the rest diagrams when the inclination of the backrest 3 is changed without moving the seat plate 2 are two states A ₄ and A ₅ , B ₀ indicates the standard position of the headrest 6, and B ₁ and B ₂ indicate the position of the headrest 6. These are two schematic diagrams of the locus when moving 6 back and forth.

C ₀ indicates the standard position when the footrest 4 is retracted, and C ₁ , C ₂ , and C ₃ are three schematic diagrams of the trajectory when the footrest 4 is extended.

Therefore, Fig. 5-4 corresponds to the combination of A ₀ , B ₁ , and C ₁ , Fig. 5-5 corresponds to the combination of A ₄ , B ₁ , and C ₂ , and Fig. 5-6 corresponds to the combination of A 0 , B 1 , and C 1 . ₅ , B ₁ and C ₂ , respectively.

Hereinafter, one embodiment of the adjustable chair of this invention will be described in detail.

(A) Structure and function of the seat plate and backrest 1 is the base of the chair including the armrests fixed to the bottom plate 8, and both ends of the support shaft 7 attached near the front end of the back of the seat plate are pivoted to the chair base 1. , seat plate 2
The rear part can move up and down using the support shaft 7 as a fulcrum.

On the other hand, rotatable spindles 9 and 10 are provided between the bottom of the seat plate 2 and the bottom plate 8 of the chair base 1, and a seat plate cylinder 11 is attached via the spindles 9 and 10.

The lower end of the backrest 3 is connected to the rear end of the seat plate 2 via a support shaft 12, and rotatable support shafts 13 and 14 are provided between the lower part of the back surface of the backrest 3 and the vicinity of the center of the bottom of the seat plate. Cylinder 1 for backrest through
Install 5.

Therefore, when the seat cylinder 11 is expanded and contracted, the rear part of the seat plate moves up and down, and when the backrest cylinder 15 is expanded and contracted, the backrest 3 is tilted back and forth.

The above-mentioned vertical movement of the rear part of the seat plate and backrest 3
The front and rear tilts are performed in conjunction with each other, and the range of movement is wider than that of conventional models.

(B) Structure and function of the footrest and footrest sub-body The footrest sub-body 5 is rotatably attached to the side surface of the chair base 1 via a support shaft 16 (which may also be used in common with the support shaft 7). The lower part of the footrest sub-body 5 can freely move back and forth.

Further, a footrest cylinder 19 is attached between the back surface of the footrest subbody 5 and the chair base bottom 8 via rotatable support shafts 17 and 18, and Guide plates 20 are provided on both sides, and both sides of the footrest sub-body 5 are slidably fitted into the guide plates 20 (the guide plates 20 do not necessarily have to be U-shaped; the footrest sub-body 5 (A device that allows the footrest 4 to slide parallel to the surface without coming off is acceptable).

Furthermore, a vertical elongated hole 21 is provided near the center of the footrest sub-body 5 (if the footrest sub-body has a truss structure, the elongated hole 21 is not necessarily necessary), and the rear edge of the footrest 4 is A locking part 22 is attached near the footrest sub-body 5, and the elongated hole 21 is passed through to the back side of the footrest sub-body 5. A string 24 is attached from the front of the locking part 22 via a spring 23, and the footrest sub-body 5 is attached with a string 24 via a spring 23. The cord passes through a string slide roller 25 attached to the tip of the back surface of the footrest subbody 5, passes through a roller 26 similarly attached to the backside of the footrest subbody 5, and is attached to the string attachment portion 27 of the chair base body.

Therefore, by extending the footrest cylinder 19, it becomes possible to tilt the footrest sub-body 5, and at the same time, the string is pulled, causing the footrest 4 to extend forward.

Further, the footrest return spring 28 is located between the rear edge of the footrest 4 and the footrest sub-body 5.
When the footrest sub-body 5 is raised beyond the normal use range, the locking portion 22 of the footrest 4 is limited to the length of the elongated hole 21, that is, the stroke. This prevents the string 24 from becoming too tensioned and breaking because it can only move within a certain range during normal use.

(C) Structure and function of head rest The head rest 6 is rotatably attached above the backrest 3 via a support shaft 29, and the upper part of the head rest 6 can freely move back and forth.

On the other hand, a headrest cylinder 32 is attached between the back of the headrest 6 and the back of the backrest 3 via rotatable support shafts 30, 31.

Therefore, when the headrest cylinder 32 is expanded or contracted, the upper part of the headrest 6 tilts back and forth.

(D) Other main devices, etc. (a) A switch to control each cylinder is installed at an appropriate location on the chair base 1 (in the figure, near the front of the upper part of the side of the chair base), and switch A controls the footrest cylinder 19. Switch B controls the seat cylinder 11, Switch C controls the backrest cylinder 15, and Switch D controls the seat cylinder 11.
control the headrest cylinders 32, respectively.

(b) Each switch is equipped with a limit switch, etc. to prevent damage to the mechanism due to forgetting to turn off the switch or other causes.

(c) Each switch is a 3-position switch, that is, it is turned off in the middle position, and when the switch is switched forward or backward, each cylinder corresponding to that switch operates and expands and contracts, and when the switch is released, the switch returns to the neutral position and the circuit is cut off. It is better to use something that can be used for both convenience and safety.

(d) Of course, a well-known solenoid valve can be used between the switch and the cylinder.

(E) The power may be electro-hydraulic, electro-mechanical, or electro-pneumatic, but the illustration shows a hydraulic type.

(f) The chair base 1 has rear legs that are appropriately long so as to prevent the chair from falling backward even when a person sitting on the chair reclines the backrest 3 fully and applies a load.

(G) Attach the necessary number of casters 33 to the bottom of the chair base for convenient movement.

The adjustable chair of the present invention includes a seat plate 2 in which both ends of a support shaft 7 attached near the back surface of the seat plate are pivoted to the chair base 1, and the rear of the seat board is movable up and down using the support shaft 7 as a fulcrum. Support shaft 12 attached to the lower end of the backrest
is pivoted and connected to the vicinity of the rear end of the seat plate 2, and has a backrest 3 which is tiltable back and forth with respect to the seat plate 2, using the support shaft 12 as a fulcrum, and by moving the seat plate 2. Since the backrest 3 is also structured to move in unison, it has the following features.

That is, since the seat plate 2 and the backrest 3 are always operated in conjunction with each other, the range of rotation is extremely wide, making it suitable for a variety of uses.

Further, the user can adjust the operating conditions of the seat plate 2, the backrest 3, the footrest 4, the footrest sub-body 5, and the headrest 6.

Furthermore, when changing the degree of inclination of the footrest 4 and the footrest sub-body 5, the footrest 4 can move in and out, which is convenient.

Furthermore, if the rear part of the seat plate 2 is slightly raised, it will assist the user in standing up, making it suitable for the elderly and the sickly. There are also effects that can be used together.

For reference, the details of the function of the adjustable chair according to the present invention are described below. (1) When used for office use Not only a vertical position, but also a forward-leaning or backward-leaning position can be taken according to each person's preference. This can reduce fatigue.

The reason why the armrests of the chair were set back a little from the front edge of the seat board was to prevent it from getting in the way of the bottom edge of the desk when working (Figures 4 and 5-1).
(See Figures 5-3).

(2) When used for a short rest If the rear of the seat plate 2 is lowered a little and the backrest 3 is tilted a little more, it will be in a state suitable for resting.

At this time, the footrest 4 may be extended as appropriate.

This makes it suitable for short breaks, reading, and watching TV (Figures 4A, 5B, and 5-
(See Figure 4).

(3) When used for long or medium rest If the inclination of the seat plate 2 and backrest 3 is further deepened as appropriate, and the footrest 4 is moved forward as appropriate,
Allows for long and medium rest.

In this case, you can further relax by adjusting the headrest appropriately to support the position of your head (Figures 4A and B and Figures 5-5 to 5).
(See Figure 5-6).

Furthermore, once you are in the state of taking a long rest, it takes some effort to raise your upper body on your own, but with this adjustable chair, you can easily get up even if you are relaxed, as it has power assistance.

(4) When standing up from a chair If you are physically weak, or if you are an elderly or infirm person who has weak ability to stand up, you can lift the back of the seat board 2 upwards as appropriate, so your body will move forward and upward. It can rise up and stand up easily (see Figures 5-7).

At this time, the backrest 3 is lifted together with the seat plate 2, so there is no risk of the upper body falling backwards, making it extremely safe.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a slope view of the adjustable chair, Fig. 2 is a partially cutaway side view of the same, and Fig. 3 is a partially cutaway side view of the same as seen from the bottom. Figure 4A is a schematic diagram of the movement locus of the seat plate and backrest, Figure 4B is a schematic diagram of the movement locus of the headrest and footrest, and Figures 5-1 to 7 are schematic diagrams of each position during use. 1... Chair base, 2... Seat plate, 3... Backrest, 4... Foot rest, 5... Foot rest sub-body, 6...
...Headrest, 7...Spindle, 8...Bottom plate of chair base, 9, 10...Spindle, 11...Cylinder for seat plate, 12-14...Spindle, 15...Cylinder for backrest, 16- 18... Support shaft, 19... Cylinder for footrest, 20... Guide plate, 21... Elongated hole, 22... Locking part, 23... Spring, 24
... String, 25, 26 ... String slide roller, 2
7... Strap attachment part, 28... Footrest return spring, 29-31... Support shaft, 32... Headless cylinder, 33... Caster, 34...
Electric motor, 35...oil tank, A...footrest operation switch, B...seat plate operation switch, C...
Backrest operation switch, D...Headrest operation switch.

Claims (1)

[Scope of Claims] 1. A seat plate 2 in which both ends of a support shaft 7 attached near the front end of the seat plate are pivoted to the chair base 1, and the rear of the seat board is movable up and down using the support shaft 7 as a fulcrum; A backrest 3 is provided, in which a support shaft 12 attached to the lower end of the backrest is connected to the vicinity of the rear end of the seat plate 2, and the backrest 3 is tiltable back and forth with respect to the seat plate 2, using the support shaft 12 as a fulcrum. A flexible chair which can be used for both office use and rest, characterized in that by moving the seat plate 2, the backrest 3 also moves in unison. 2. A flexible chair according to claim 1, which is provided with a footrest that can be moved in and out. 3. A flexible chair according to claims 1 and 2, in which a headrest part that can be tilted back and forth is added.