JPS6110521Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a seat, and in particular to a multi-functional seat that allows sitting upright, acupressure on the lower back, etc.

Seiza is a posture corrector that prevents the spine from curving and eliminates the cause of lower back pain, but it is currently not possible to do it for long periods of time because it causes numbness in the legs. It is.

As a solution to this problem, there is a chair with a seat that was previously filed by the applicant of the present invention (Japanese Patent Application No. 1983-22599). This seat has a pair of rotatable arms attached to two pillars that support the backrest, and a seat between the ends of the arms, which prevents numbness in the legs and makes it easier to sit upright. By doing this, it prevents the spine from curving and is highly effective in alleviating the cause of lower back pain.

The present invention aims to further improve the above-mentioned seat with a seat and make it multifunctional.

In order to achieve such an object, the present invention makes it possible to apply effective acupressure to the lower back by effectively utilizing the seat part of a seat with a seat. Hereinafter, the multifunctional chair according to the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the multifunctional seat according to the present invention, and FIGS. 2 and 3 are a partially cutaway rear view and side view of the arm height adjustment mechanism shown in FIG. Mounting fittings 2 are fixed to both rear sides of the board 1. And this mounting bracket 2 has
A pillar 3 is supported so as to be rotatable in the front and rear directions, and a backrest portion 4 is provided between the tips of the pair of pillars 3.
is fixed. Further, a support arm 5 is rotatably supported on a part of each column 3.
The other end of the support arm 5 engages with a notch 6 provided in the mounting bracket 2 to restrict its rearward rotational position. Furthermore, a shaft 7 is provided between the pair of supports 3.
is passed through, and a pair of arms 8 are rotatably supported by this shaft 7. A seat part 10 is provided between the tips of the pair of arms 8 thus provided, which is rotatable about a shaft 9. In this case, the weight of the seat 10 is unbalanced in the front-rear direction with respect to the shaft 9, so that the front side is heavier. On the other hand, a shaft 1 is located between the supports 3 at a position slightly shifted toward the board 1 side from the pivot point of the arm 8.
1 is passed, and an eccentric cam 12 is engaged with this shaft 11. As shown in FIGS. 2 and 3 in detail, the eccentric cam 12 has a polygonal circumferential surface, and each side of the eccentric cam 12 is uneven with respect to the shaft 11 serving as a fulcrum. They are equidistant. The eccentric cam 12 is provided facing the lower surface of the arm 8, and is also provided on the support column 3.
A compression spring 14 and a steel ball 15 are installed in the recess 13 and are rotated in stages between a recess (not shown) provided on the side surface of the column 3. holding position. Further, a pin 16 is implanted between the backrest portion 4 and the shaft 7 of the support column 3 and on the side portions facing each other, and this pin 16 engages with the arm 8 and moves toward the rear of the arm 8. It prevents the rotation of.

On the other hand, the seat part 10 has a rectangular base plate 17 made of an iron plate, as shown in FIGS. Both end portions in the direction are bent to form side walls 18. Bearings 19 are provided at substantially central portions of the side walls 18 in the width direction (actually, they are slightly shifted so that the surfaces thereof can be rotated in the forward direction). In this case, it goes without saying that the bearing hole 20 of the bearing 19 is along the longitudinal direction of the seat portion 10.

An elastic material 21 such as a relatively thick urethane foam is attached to the inner part of the substrate 17 configured as described above, and the outer periphery of the substrate 17 and the elastic material 21 is covered with cloth, vinyl leather, etc. It is covered with a sheet 22. Furthermore, a protrusion 23 is fixed to the outer surface of the substrate 17 via an exterior sheet 22. The protrusion 23 is made of rubber, resin, etc., and has two semicircular arc-shaped protrusions 24 spaced apart from each other at a predetermined distance.A permanent magnet 25 is installed inside each of the protrusions 24. Substrate 1 embedded and made of magnetic material
It is fixed by adsorption to 7. Therefore, the protrusion 23 can be freely removed and moved, and when in use, the seat 22 is mounted so that the protrusions 24 are arranged side by side on the axis of rotation.

In a multifunctional chair configured in this way,
When the arm 8 is rotated forward, the lower surface of the arm 8 engages one side of the eccentric cam 12 as shown in FIG. 3, thereby restricting the downward rotation of the arm 8. In this case, since the linear portions of the lower surfaces of the eccentric cam 112 and the arm 8 engage with each other, rotation of the eccentric cam 12 is prevented, and accordingly, the arm 8
The height (angle) of the eccentric cam 12 is regulated by the engagement side of the eccentric cam 12 and the distance between the axes. Next, if you want to increase the height of the arm 8, raise your waist and rotate the eccentric cam 12 shown in FIG. 3 to the left to engage the lower surface of the arm 8 with the increased side. . In this way, the engagement position of the arm 8 with the side of the eccentric cam 12 moves upward, and the height of the arm 8 increases accordingly. In addition, the eccentric cams 12 on both sides
are connected to each other by the shaft 11, so
By simply rotating one eccentric cam or shaft 11, the height of the arm, that is, the height of the seat portion 10 can be easily adjusted.

In this case, the protrusion 23 described in FIGS. 4 and 5 is provided on the back surface of the seat 10, and this protrusion 23 is a concave part of the leg between the legs when sitting upright or between the heel and calf. It does not get in the way when sitting upright, but it can be removed if necessary.

Next, to change from a seiza seat to a normal seat, lift the arm 8. In this way, since the front part of the seat part 10 is set to be heavier than the rear part as described above, the seat part 10 is set so that the front part faces downward and its surface faces forward as shown in FIG. It is housed in the lower part of the backrest part 4.
In this case, the arm 8 engages with a pin 16 implanted in the support column 3, and is prevented from rotating rearward.

Therefore, when the arm 8 is lifted up and accommodated between the supports 3 as shown in FIG. 6, the seat portion 10 also functions as a backrest and becomes a normal seat. Note that even when the arm 8 is lifted, the eccentric cam 12 retains its position by engaging the steel ball 15 with the recess provided in the support column 3, so that the arm 8 cannot be rotated forward again. The height does not change even if it is used for sitting in a sitting position.

Next, acupressure near the waist using the protrusion 23 provided on the back surface of the seat 10 will be described. First, with the eccentric cam 12 set at a position where the seat portion 10 is relatively high, the seat portion 10 is
When the arm 8 is pulled forward, the arm 8 and the eccentric cam 12 are engaged to set the angle of the arm 8, that is, the height of the seat 10. And in this state,
Since the lower side of the seat part 10 is weighted, the front side thereof faces forward. On the other hand,
The user forcibly turns the seat 10 180 degrees and holds it, so that the back surface of the seat 10 faces forward and the protrusion 23 is exposed, as shown in FIG. In this state, the user, for example, as shown in FIG. 8, leans his or her lower back against the back of the seat 10 with their legs stretched out in front of them, and also leans their shoulders and head against the backrest 4.

In such a state, the seat portion 10 pushes the lower back forward and corrects the curvature of the spine, making it extremely comfortable to sit. In this case, a protrusion 23 is provided on the back surface of the seat portion 10, that is, the portion that corresponds to the waist.
Because of this, the protrusion 24 of the protrusion 23 strongly presses the lower back, resulting in a state similar to that of receiving acupressure. Since the protrusion 23 utilizes the attraction of the permanent magnet 25, it is extremely easy to move and can be easily adapted to the body shape of the user.

In this case, the seat 10 is not just a rest for the waist, but the relatively long arm 8 pushes the waist relatively strongly forward. Therefore,
The protrusion 25 provided on the seat 10 has an extremely strong lumbar pressing effect.

Next, from the state shown in FIG. 7, with the seat 10 prevented from rotating, that is, with the back side of the seat 10 to which the protrusion 23 is attached facing forward, move the arm 8 toward the backrest. When the chair is returned to its original position and used in the same way as a normal chair, the protrusions 24 will be directed forward, allowing acupressure on the back or waist.

In the above embodiment, the protrusions 24 are arranged in pairs, but it goes without saying that the protrusions 24 may be divided one by one or may be arranged in two or more sets. Further, although the case has been described in which the protrusion 23 is attracted and fixed by the permanent magnet 25, the present invention is not limited to this, and it is also possible to completely fix the protrusion 23 or to use an attachment/detachment mechanism other than a magnet.

Furthermore, the shape and hardness of the protrusion 24 can be freely set.

As explained above, since the multifunctional seat according to the present invention has a protrusion on the back side of the seat used for sitting upright, this protrusion can be used to perform acupressure. In addition, in the present invention, the seat portion provided with the protrusion is provided at the tip of the arm so as to be freely rotatable in the front and back direction.
The pressing state of the protrusions against the user is adjusted to the body shape, and the acupressure effect is enhanced. Furthermore, arm 8
Since it is engaged with the eccentric cam that constitutes the height adjustment mechanism, the height of the seat part can be changed freely, and accordingly, the position on which the protrusion is pressed can be changed freely, etc. It has various excellent effects.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an embodiment of the multifunctional chair according to the present invention, Figures 2 and 3 are enlarged views of the main parts of Figure 1, and Figures 4 and 5 are the seat shown in Figure 1. The back view and sectional view, and FIGS. 6 to 8 are perspective views showing examples of use. 1... Board, 3... Support, 4... Backrest,
7,9,11...Shaft, 8...Arm, 10...Seat portion, 12...Eccentric cam, 16...Pin, 17...
... Substrate, 19 ... Shaft, 21 ... Elastic body, 22 ...
Exterior sheet, 23...Protrusion, 24...Protrusion, 2
5...Permanent magnet.

Claims (1)

[Scope of utility model registration request] A pair of pillars provided on both sides of the rear of a plate-shaped base, a backrest fixed between the upper parts of the pillars, and the pillars arranged between the base and the backrest. A rotary shaft passing through the rotary shaft rotatably in the installation direction, and a plurality of planes fixed coaxially to the rotary shaft in contact with the opposing surfaces of the respective pillars, and having a plurality of planes having different radial distances on the circumferential surface thereof. an eccentric cam having one end rotatably supported by a portion of each of the pillars directly above the rotating shaft penetrating portion and facing the eccentric cam, and when rotating downward, the eccentric cam a pair of arms having slopes on their support side end faces that are in surface contact with each of the planes provided on the circumferential surface of the arm; and a seat rotatably provided between the ends of the arms on the non-rotating fulcrum side. By rotating the eccentric cam and changing the contact position with the slope provided on the end surface of the arm, the downward rotation position of the arm is restricted and the height of the seat is adjusted. The seat is configured to have a magnetic plate fixed to the back side of the seat portion, and a protrusion that is attracted and fixed to the magnetic plate by a permanent magnet provided inside. The object is composed of two protrusions arranged in parallel with arc-shaped tips, and a relatively hard elastic material that covers at least the end portions of the protrusions, and the seat part can be rotated in the width direction. The seat is characterized in that the front side on which the elastic body is attached is automatically shifted to face forward so that the support position is suitable for sitting on the seat part.