AUXILIARY CHAIR FOR IMPROVING POSTURE FOR USE WITH A CHAIR
The present invention consists in a posture-improving auxiliary chair for use with a chair designed to improve the posture. An object of the invention is to improve the posture by routinely using the auxiliary chair which is placed on a chair. According to this invention, the front center of the concavely curved seat face portion is recessed in the form of a band extending toward the rear center, and raised portions gently raised from the lateral sides toward the recessed portion are formed on the front section of the seat face portion. In the vicinity of the foots of the raised portions there are formed fan-shaped inclined surfaces gently slanting in an oblique direction toward the front. In the center of the bottom of the seat formation part there is formed a convexly curved portion, on forward and rearward extensions of which there are formed a front stop portion and a rear stop portion, respectively. It is a seat formation support part that includes these component elements and supports the seat formation part from below. These parts are joined together in one-piece and all of the corners are chamfered, whereby a generally rounded auxiliary chair for use with a chair for improving the posture is obtained.
The invention relates to an auxiliary chair for use with a chair for gradually improving the posture by using it routinely, which is like a cushion useful to be placed on a chair.
THE BACKGROUND ARTThe conventional cushion is constructed of a material and in a configuration intended to support the buttocks softly, but is not designed with a view to maintaining the physiological bowing of the backbone. Therefore, when the user sits naturally on a cushion placed on a flat-seat chair with his or her both soles touching the ground, his or her pelvises are prone to be bent rearwardly relative to the forward-bending of the pelvises in the standing posture, in linkage with which the coccyx, sacrum and backbone will also be rearwardly bent. As a result, the backbone will lose its physiological bowing, and turn into a rearwardly bent state, so that the weight of the upper body of the trunk is exerted on the coccyx, ischia and their vicinities, lower lumbar vertebrae and intervertebral disks, and the thigh's backsides to thereby increase the burden on the waist and coccyx. In addition, since the user is likely to assume a posture in which he or she may easily cross the legs, the weight of the upper body of the trunk exerted on the ischia and their vicinities tends to become unbalanced to thereby possibly cause strains on the skeleton.
DISCLOSURE OF THE INVENTIONFor the benefit of brevity of the description of the present invention, the auxiliary chair for use with a chair for improving the posture will sometimes be referred to simply as “auxiliary chair” in the following description.
According to this invention, the front center of the concavely curved seat face portion is recessed in the form of a band extending toward the rear center, and raised portions gently raised from the lateral sides toward the recessed portion are formed on the front section of the seat face portion. In the vicinity of the foots of the raised portions there are formed fan-shaped inclined surfaces gently slanting in an oblique direction toward the front. The seat including these component elements comprises a seat formation part. In the center of the bottom of the seat formation part there is formed a convexly curved portion, on forward and rearward extensions of which there are formed a front stop portion and a rear stop portion, respectively. It is a seat formation support part that includes these component elements and supports the seat formation part from below. These parts are joined together in one-piece and all of the corners are chamfered, whereby a generally rounded auxiliary chair for use with a chair for improving the posture is obtained.
When the user sits on a chair with the use of the auxiliary chair, he or she is urged to spread out the legs to thereby make it hard to cross the legs. In addition, as the pressure on the genital organ is alleviated, it is possible to relieve deterioration of the reproductive capability, oppressive pain of the genital organ, constriction in the urethra, etc. Moreover, the pelvises are bent forwardly and the physiological bowing of the backbone is guided, so that the weight of the upper body of the trunk exerted on the coccyx, the ischia and their vicinities, the lower lumbar vertebrae and intervertebral disks, and the thigh's backsides are distributed in good balance to the legs, with the result that the legs will be exercised while at the same time the burden on the waist and coccyx may be alleviated. Furthermore, since the auxiliary chair is of such a construction as to make it hard to bring the pelvises into their rearwardly bent state, the user may be prevented from assuming a posture with his or her backbone bent rearwardly for a long time. As a result, the user may gradually improve his or her posture by continuing to routinely use this auxiliary chair placed on a chair.
Before making a brief description of the drawings, the reference characters and numerals used in the drawings will be explained below. The character (a) indicates an auxiliary chair and the character (b) indicates an auxiliary chair devoid of the recessed portion. The weight reduced auxiliary chair designated by the character 1a used in
Before describing the drawing of
The present invention will now be described in details with reference to the accompanying drawings.
The seat formation part 1 may be formed of rubber, wood, steel, plastic, resin, corrugated cardboard and other materials comfortable in seating, moderately hard and having reversibility or restorability.
The seat face portion 6 is smoothly and concavely curved from the rear toward the front in order to enhance fitness feeling for the buttocks, to facilitate guiding the forward-bending of the pelvises, and to make it possible for the user to select the forward-bending angle of the pelvises depending on his or her seating position. The degree of the curvature of the seat face portion 6 may be varied as required since the forward-bending angle of the pelvises in the standing posture delicately varies depending on the age, individual difference and the race.
The recessed portion 7 is recessed in the form of a band extending from the front center of the seat face portion toward the rear center thereof in order to relieve the pressure on the genital organs and coccyx. The width and depth of the recessed portion 7 may be varied as required since the size of the genital organs and coccyx varies from person to person.
The front section of the seat face portion 6 is gently raised from the lateral sides thereof toward the recessed portion 7 to form raised portions 10, in order to retain the roots and their vicinities of the inner portions of the thighs to urge both legs to spread out to thereby prevent the upper body of the trunk from leaning excessively forwardly as well as to prevent the seated position from creeping. The size and height of the raised portions 10 may be varied as required.
The thigh's backside rests 11 formed in the vicinity of the foots of the raised portions 10 are fan-shaped inclined surfaces gently slanting in an oblique direction toward the front which are designed to facilitate guiding the forward-bending of the pelvises and to smoothly transfer the weight of the upper body of the trunk to the legs. The degree of the starting point of inclination, the angle of inclination and the extent of the thigh's backside rests 11 may be varied as required since the size of the buttocks, the spacing between the ischia, the excursion of the hip joints, the size of the thighs, etc. vary from person to person.
The front edge 12 is moderately curved in order to relieve the pressure on the nerves and blood vessels passing through the thighs' backsides.
The front section 13, the rear section 14 and the side section 15 are smoothly inclined from the seat formation part 1 toward the bottom of the seat formation support part 5.
The seat formation support part 5 may be formed of rubber, wood, steel, plastic, resin, corrugated cardboard and other hard materials less deformable under the weight of the upper body of the trunk when seated.
The bottom curved portion 16 is moderately convexly curved in order to facilitate forward- and rearward-bending of the pelvises. It should be noted, however, that the bottom curved portion 16 is curved only in forward and rearward directions but not in transverse directions in order to make the weight of the upper body of the trunk exerted on the ischia and their vicinities approach to uniformity and to bring the heights of the left and right pelvises into uniformity. Consequently, the auxiliary chair (a) is capable of swinging or tumbling only in forward and rearward directions. The degree of curvature of the bottom curved portion 16 may be varied as required.
The front stop portion 17 lies forwardly on an extension of the bottom curved portion 16 and acts to prevent the auxiliary chair (a) and the upper body of the trunk from leaning forwardly excessively. The rear stop portion 18 lies rearwardly on an extension of the bottom curved portion 16 and acts to prevent the user from falling rearwardly. While the front stop portion 17 and the rear stop portion 18 are basically of a planar shape, they may be varied in shape as required depending upon the material or configuration of the seat formation part of used chair.
From
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Preferably, a chair 25 on which the present invention is to be used includes a seat 26 having a seat area at least equal to that of the auxiliary chair (a) which is preferably planar without being inclined rearwardly, having a hardness allowing for swinging or tumbling of the bottom curved portion 16, and having a height such that the user 27 may sit on the auxiliary chair (a) on the seat with his both soles 28 positively resting on the ground.
The method of using the present invention comprises first placing the auxiliary chair (a) on the chair 25 with the front edge 12 of the auxiliary chair (a) oriented toward the front edge 29 of the seat 26 of the chair 25 on which the user is going to sit. However, it should be noted that the front edge 12 of the auxiliary chair (a) must not extend beyond the front edge 29 of the seat 26 of the chair 25 being used.
The user 27 sits slowly with his buttocks 30 resting on the center of the auxiliary chair (a), his legs 31 closed together, his both soles 28 securely touching the ground, and his pelvises 32 forwardly bent, as shown in
When the user 27 is seated in a posture as shown in
Next, when the user 27 is seated in a posture as shown in
The weight reduction of the auxiliary chair (a) is made possible by varying the thickness of the seat formation part 1 and hollowing out the interior of the auxiliary chair (a). The reference numeral 19 in
This auxiliary chair (b) is intended to be used mainly by women who suffer less pressure on their genital organs from the seats. The raised portion 10 on the front section of the auxiliary chair (b) is gently raised from the lateral sides toward the center of the front section of the auxiliary chair (b). The description on the rest of the best mode for carrying out the invention of the auxiliary chair (b) is the same as that already made hereinbefore on the best mode for carrying out the present invention excluding the description of the recessed portion.
The auxiliary chair of the present invention is provided over its entire surface with nonslipping treatment in order to prevent the seated position from creeping when the user is seated in his or her selected position as well as to prevent the orientation of the auxiliary chair as placed on the chair from becoming displaced and further to enhance the function of the front stop portion 17 and the rear stop portion 18. In addition, the auxiliary chair has all its corners chamfered in order to enhance the safety. Therefore, the auxiliary chair becomes rounded shape as a whole. Further, it is a matter of course that the size of the auxiliary chair of the present invention may be varied without departing from the essential characteristics thereof as individual persons differ in their physiques from person to person. Moreover, this auxiliary chair is applicable as a seat for various types of chairs.
Claims
1. An auxiliary chair for improving the posture for use with a chair, said auxiliary chair having a size and thickness such as to allow a person to sit with his or her buttocks resting on the auxiliary chair, and comprising a top part and a bottom part, characterized in that the top part has a concavely curved seat face portion in which a recessed portion is formed, said recessed portion being recessed in the form of a band extending from the front center of the seat face portion toward the rear center thereof, a raised portions being formed in the front section of said seat face portion, said raised portions being gently raised from the lateral sides of the seat face portion toward said recessed portion, in the vicinity of the foots of said raised portions there being formed fan-shaped inclined surfaces gently slanting in an oblique direction toward the front, said bottom part having a convexly curved portion in the center thereof and stop portions formed forwardly and rearwardly on extensions of the convexly curved portion.
2. The auxiliary chair according to claim 1 which is devoid of said recessed portion.
Type: Application
Filed: Oct 30, 2007
Publication Date: Apr 1, 2010
Inventor: Tomoyuki Nemoto (Ibaraki)
Application Number: 12/517,118
International Classification: A47C 7/62 (20060101);