JPH0542Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a seat chair for seiza.

(Prior Art) In recent years, the medical efficacy of sitting straight has been pointed out, and various chairs for sitting straight that are suitable for use by people with bad knees have been developed.

An example of this type of seat for sitting straight will be explained with reference to FIG. 6.

In the figure, 100 is a backrest, the lower end of which is connected to a base 102.

Reference numeral 104 denotes a seat portion, which is provided in the middle of the backrest 100 so as to extend substantially horizontally.

Those who have problems with their legs, hips, or knees, or those who dislike numbness in their legs, should rest their buttocks on the seat 104, bend their knees, and place their lower legs into the space between the seat 104 and the base 102 to sit straight. It is a chair that can be used for

(Problems to be Solved by the Invention) However, the above-mentioned seat chair for seiza has the following problems.

Since the height of the seat is constant, it is difficult to use if it does not suit the user's body type, and using it may actually make your body feel worse or your legs may become numb.

The seat does not move back and forth, so if you want to have the edge of a table or stand close to you, you have to sit on the seat and then move the entire chair or pull the table or stand closer to you, making it difficult to use. There is a point.

Another problem is that the seat is fixed, making it difficult to change the posture and making long-term use even more painful.

Accordingly, an object of the present invention is to provide an easy-to-use seat chair for seiza sitting that can adjust the position of the seat according to the body shape of the user.

(Means for Solving the Problems) In the present invention for the above-mentioned purpose, a seat for sitting straight has a thigh rest, a backrest, and a seat portion arranged above the thigh rest with an interval above the thigh rest. In the chair, a rail is disposed approximately in the central part of the thigh rest in the front-rear direction, a movable base is provided so as to be movable along the rail, and an expandable and retractable gas spring is provided on the movable base, and the gas spring The seat portion is attached to the telescopic rod, a lever for unlocking the gas spring is provided, and the movable base is provided with a lock lever that can be locked with the rail.

(Function) The user can sit upright by sitting on the seat, bending the knees and placing the lower legs into the space between the seat and the thigh rest.

You can adjust the seat height and fore/aft while sitting.

The height of the seat can be easily adjusted by unlocking the gas spring using a lever.
Further, the movable base and the rail can be locked by the lock lever to fix the back and forth movement of the seat. By releasing the lock by the lock lever, the seat can be moved back and forth freely.

(Embodiment) Hereinafter, a preferred embodiment of the present invention will be described in detail based on the accompanying drawings.

In Figures 1 and 2, 10 is a thigh rest;
1 is a backrest erected at the rear end of this thigh rest 10. Reference numeral 12 denotes a seat, which is provided on the thigh rest 10 via a gas spring 13 so as to be vertically movable. A chair body 14 is composed of a thigh rest 10, a backrest 11, a seat 12, and the like.

The chair body 14 is rotatably provided on a base 15. That is, as shown in FIG. 3, the disc part 16 attached to the lower surface of the thigh rest 10 is fitted into the ring plate part 17, and the circumferential groove provided on the outer periphery of this disc part 16 and the inner periphery of the ring plate part 17 is inserted into the ring plate part 17. The chair body 14 can be smoothly rotated by fitting the bearing balls inside. In addition, 1
Reference numeral 8 denotes a grounding projection provided on the lower surface of the ring plate portion 17.

Reference numeral 19 denotes a rotation stopper knob, and a male thread 20 provided on the knob 19 is screwed onto the thigh rest 10, and by rotating the knob 19 and pressing the upper surface of the ring plate portion 17 with the lower end of the male thread 20. , chair body 14
The rotation can be stopped at any position.

FIG. 4 shows a mechanism for moving the seat 12 up and down.

Reference numeral 21 denotes a movable table (see FIG. 2), which is designed to move back and forth on the thigh rest 10, as will be described later. The gas spring 13 described above is fixed on this movable base 21, and the seat 12 described above is fixed to the telescopic rod 22 of this gas spring 13 via a mounting tube 23. 24 is a lock pin, and when this lock pin 24 is pushed in, the known locking mechanism is released, allowing the telescopic rod 22 to freely expand and contract.If the lock pin 24 is released from being pushed in at any position on the telescoping rod 22, , the telescoping rod 22 is locked in that position.

25 is a lever for pushing the lock pin 24;
One end is rotatably supported on the mounting tube 23 by a pin 26, and by rotating a lever 25 that protrudes toward the front side of the seat 12 around the pin 26, the lock pin 24 is moved by its lever action. It is designed to be easily penetrated.

The maximum compression length of the gas spring 13 is determined by the length of its cylinder, etc., but in this embodiment, the minimum distance between the lower surface of the seat 12 and the upper surface of the thigh rest 10 is approximately 12 cm. This ensures safety by preventing the seat 12 from lowering any further.

FIG. 5 shows a mechanism for moving the seat 12 back and forth.

Reference numerals 30 and 30 denote rails, which are attached to the upper surface of the thigh rest 10 in parallel in the front-rear direction, sandwiching the movable base 21 therebetween.

The rails 30, 30 have a substantially U-shaped cross section, are fixed to the upper surface of the thigh rest 10 at a U-shaped connection part, and both free ends are horizontally bent outward to form a rail surface. There is.

Reference numerals 31 and 31 denote slide members, each of which has a substantially U-shaped cross section, and one of the parallel pieces slides over the movable base 21.
It is fixed to the side wall surface, and the free ends of both parallel pieces are bent inward, and this bent part is connected to the rail 3.
Rail 30 so that it is below the bend of 0,30,
30, the rails 30,3
It is provided so that it can slide freely on the top. Therefore, the movable base 21 and the seat 12 are movable back and forth along the rails 30, 30.

In the figure, the sliding contact piece 32 provided on the inner bottom surface of the slide members 31, 31 slides on the rail surface of the rails 30, 30, but the inner bottom surface of the slide members 31, 31 directly touches the rail surface. It may be made to slide upward. Alternatively, although not shown, rotating rollers or bearing balls may be interposed between the inner bottom surfaces of the slide members 31, 31 and the rail surface to allow the seat 12 to move back and forth more smoothly.

Reference numeral 33 denotes a lock lever, which is approximately L-shaped and rotatably supported on the front end surface of the movable table 21 near the bent portion of the L-shape. This lock lever 33
is normally biased by a spring (not shown) in the direction in which the lever part stands up, and at this time, the locking pawl on the other end side is provided at a constant interval on the side wall surface of the rails 30, 30 described above. It engages in the locking hole 34, thereby restricting the back and forth movement of the seat 12. When the lock lever 33 is rotated in the direction of the arrow in FIG.
becomes mobile.

The seat 12, the backrest 11, the thigh rest 10, etc. are provided with a cushion material, and it is preferable that a heater (not shown) is provided in the cushion material as required.

Next, we will discuss how to use it.

The user can sit upright by sitting on the seat 12, bending his knees and placing his lower legs into the space between the seat 12 and the thigh rest 10.

The height adjustment and longitudinal adjustment of the seat 12 can be performed while sitting.

To adjust the height of the seat 12, push down the lever 25, push in the lock pin 24, and release the telescopic rod 2.
Release the lock of 2. To raise seat 12, lift your hips. As a result, the gas spring 13 is extended and the seat 12 is automatically raised, so it is only necessary to release the lever 25 at an appropriate position and lock it. To lower the seat 12, when you put your weight on the seat 12, the gas spring 13 retracts and locks at an appropriate position.

To adjust the longitudinal position of the seat 12, the lock lever 33 is rotated in the direction of the arrow in FIG. 5 to disengage the locking pawl from the locking hole 34. This allows the seat 12 to move freely in the front-back direction, so the seat 12 can be moved to an appropriate position.
2 and release the lock lever 33 to lock it in that position.

When the knob 19 is loosened, the chair body 14 becomes freely rotatable. The chair body 14 may be used while being rotatable as described above, or the chair body 14 may be fixed at an appropriate rotation position using the knob 19.

Since the chair body 14 is rotatable, for example, even if the chair is placed directly in front of a table, the chair can be used without being pulled out. That is, the user can easily sit by rotating the chair body 14 in a direction that does not directly face the table, etc., and then only needs to rotate the chair body 14 in a direction to face the table, etc. Further, the seat 12 can be moved back and forth by rotating the lock lever 33 while the user is seated. When the user leaves the table etc., the user can perform the opposite operation.

Furthermore, if it is desired to use the heaters built into the seat 12, backrest 11, etc., this can be done by turning on a switch (not shown).

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments. Of course, many more modifications can be made without departing from the above.

(Effects of the invention) By using the seat chair for seiza according to the present invention, it is possible to prevent numbness of the legs when sitting upright, and the position of the seat can be set to any desired position, so it can be used for any body type. It can be used even by people with disabilities, and allows them to sit seiza for long periods of time. In particular, since a gas spring is used to move the seat up and down, the seat can be moved up and down with a single touch, making it easier to maintain a sitting position. In addition, since the bottom dead center of the gas spring is determined by the cylinder length, a space greater than a predetermined amount can always be secured between the bottom surface of the seat and the top surface of the thigh rest, so that the gas spring can be safely used as a seat for straight sitting.

[Brief explanation of the drawing]

Fig. 1 is a side view of the chair, Fig. 2 is a front view, Fig. 3 is a partial sectional view showing the rotation mechanism of the chair body, Fig. 4 is a partial sectional view showing the vertical movement mechanism of the seat, and Fig. 5 The figure is an explanatory view showing an example of a seat back-and-forth movement mechanism and its locking mechanism. FIG. 6 shows a perspective view of a conventional chair. 10...thigh rest, 11...backrest, 12...
...Seat, 13...Gas spring, 14...Chair body, 15...Base, 19...Knob, 21...Movable base, 25...Lever, 30...Rail, 33...
Rock lever.

Claims (1)

[Scope of Claim for Utility Model Registration] A seat chair for seiza that has a thigh rest, a backrest, and a seat disposed above the thigh rest at a distance from the upper surface of the thigh rest, comprising: A rail is provided in the front-rear direction approximately at the center of the seat, a movable platform is provided so as to be movable along the rail, an extendable gas spring is provided on the movable platform, and the seat portion is attached to the telescopic rod of the gas spring. A seat chair for sitting straight, characterized in that: a lever is provided for attaching and unlocking the gas spring; and the movable base is provided with a lock lever that can be locked with the rail.