JP2021074420A - Abdominal muscle reinforcement tool - Google Patents

Abstract

To provide an abdominal muscle reinforcement tool which can be carried.SOLUTION: An abdominal muscle reinforcement tool X comprises: a base part 1 which is formed of a material capable of being folded, and mounted on a surface to be mounted; a right and left pair of support parts 10, each support part being provided on a right/left portion of a top surface of the base part 1 in a bulge state from a tip end to a rear end thereof; and a long groove space 20 which is formed between facing inside side faces of the support parts 10. In use of the abdominal muscle reinforcement tool X, when a human body takes a posture of a supine state, the long groove space 20 is a recess facing a spine region of the human body, and the right and left pair of support parts 10 has an inclined support surface 15 for supporting a waist or a back corresponding to a reverse side of a navel, the human body can reinforce the abdominal muscle in a state of maintaining a supine state posture and separating a heel of a foot from the surface to be mounted, on the other hand, when the abdominal muscle reinforcement tool X is not used, the right and left pair of support parts 10 can be folded to a lower surface side of the base part 1 in a facing state through a center part of the base part 1.SELECTED DRAWING: Figure 6

Description

The present invention relates to an abdominal muscle strengthening tool, and more particularly to an abdominal muscle strengthening tool that is placed on a floor surface, a tatami mat or the like and can strengthen the abdominal muscles while maintaining a supine posture.

The invention of Patent Document 1 relates to a mat that enables effective abdominal muscle exercise without pressing the spine, and is a long groove space (concave) for receiving the spine from the tip end to the rear end portion in the central part of the mat. The raised support portion located parallel to the left and right sides of this long groove space has gentle semi-arc-shaped contact surfaces having different rising angles from the bottom surface on the front end side and the rear end side, respectively. It has, and reduces the burden on the spine during abdominal exercises, reduces the burden on the base muscles at the time of initial abdominal exercises, and enables assistance with abdominal exercises.

According to the present invention, when the human body is in a lying position during use, the long groove space (recess) has a depth at which the spinal column portion of the human body does not contact the upper surface of the central portion of the base portion. Although it can be understood that the burden on the spine can be reduced during exercise, while supporting the latissimus dorsi muscles of the back along the spinal column with the opposite edges above the left and right raised support portions, Since it is not clear how to exercise the abdominal muscles, it is doubtful whether the abdominal muscles can be sufficiently strengthened.

Therefore, when I accessed the homepage of the applicant of Patent Document 1, the invention of Patent Document 1 was called a "stretch mat", and the basic usage was an abbreviation for each arc-shaped inclined portion of the pair of left and right support portions. Make sure that the central part is located approximately in the center of the waist (the part that corresponds to the back of the navel), bend both knees, and keep the posture of lying on your back, and breathe as if you were looking into the navel. The upper body was raised while exhaling, and then returned to its original position while inhaling, that is, the upper side of the latissimus dorsi muscle on the back was returned to the position where it contacted the arcuate inclined surface on the rear end side of the raised support. (The spinal column will be warped).

This abdominal muscle exercise raises and lowers the upper body side, not both knees or feet, with respect to the arc-shaped inclined surface on the posterior end side of the raised support, while the spine is arcuate upward, so that it is applied to the lumbar region. There was a problem that it is not suitable for the general public (for example, middle-aged and elderly people) and the person who has a pain in the lower back, especially if it is an athlete who has a local load. Therefore, as a result, for middle-aged and elderly people, although it is possible to "correct the distortion of the spinal column by the stretching method", there is a drawback that the effect of strengthening the abdominal muscles cannot be fully expected.

Patent Document 2 relates to a body training tool capable of performing a plurality of exercises, and in FIG. 13, a central groove is formed from one end to the other end in the longitudinal direction at a substantially central portion of a trapezoidal upper surface. It is described that the central sulcus is a recess with a depth that does not press the spine when the human body lies on its back.

Since the trapezoidal upper surface does not support the lumbar region corresponding to the back side of the navel when the human body lies on its back, for example, while maintaining the supine posture, both knees are bent. The abdominal muscles cannot be strengthened with the heel of the foot separated from the mounting surface.

Further, FIG. 14 shows that the lumbar muscles are exercised by applying the lumbar region to a laterally inclined curved recess having a short vertical spine receiving groove in a state where the physical training tool is turned upside down. The abdominal muscle exercise is to perform a contraction exercise of the abdominal muscle in a stationary state while maintaining a constant inclination angle, and while applying the lumbar region to the inclined curved recess, both knees are bent and the heel of the foot is placed on the mounting surface. When it is separated from the above, it cannot be stably supported only by the inclined curved recess, and there is a problem that it is difficult to maintain the balance of the V-shape. It is a well-known fact from experience that it is not easy for athletes to exercise their abdominal muscles while maintaining a V-shaped balance.

Utility Model Registration No. 3117866 Gazette 13 and 14 of Japanese Patent Application Laid-Open No. 2014-212793

A main object of the present invention is in view of the problems of Patent Document 1 and Patent Document 2, in Patent Document 1 in an abdominal muscle strengthening tool capable of strengthening abdominal muscles while supporting a posture in a lying state without pressing the spinal column. Compared to the described invention, the abdominal muscles can be strengthened by keeping the back from the inclined support surface, and the abdominal muscles can be easily folded and carried in a bag in a folded state. Is to get an abdominal muscle strengthener that can do. The second purpose is to be able to obtain the effect of acupressure at the same time as strengthening the abdominal muscles. The third purpose is that it can be manufactured at low cost. The above and other objectives and novel features of the present invention will become more fully apparent when the following description is read in light of the accompanying drawings. However, the drawings are for illustration purposes only and do not limit the technical scope of the present invention.

The abdominal muscle strengthening tool of the present invention is formed of a bendable material, and has a predeterminedly shaped base portion to be placed on a mounting surface such as a floor or a tatami mat, and left and right portions on the upper surface of the base portion from the tip portions thereof. It is an abdominal muscle strengthening tool composed of a pair of left and right support parts provided in a raised shape up to the rear end and a long groove space formed between the opposite inner side surfaces of the support parts, and when the abdominal muscle strengthening tool is used, When the human body is in a lying position, the long groove space is a recess facing the spinal column portion of the human body, and the pair of left and right support portions support at least the waist or back corresponding to the back side of the navel. The human body can strengthen the abdominal muscles while maintaining the posture of lying on the back and keeping the ankles away from the mounting surface, while the abdominal muscle strengthening tool does not work. At the time of use, the pair of left and right support portions can be folded toward the lower surface side of the base portion via the central portion of the base portion so as to face each other (the invention according to claim 1).

Further, the abdominal muscle strengthening tool of the present invention is formed of a material that connects a pair of left and right support portions provided in a raised shape from the tip end portion to the rear end portion and the lower end portions of these support portions and is bendable. It is an abdominal muscle strengthening tool that consists of a strip-shaped central portion, a long groove space formed on the upper surface of the central portion and the opposite inner side surface of the support portion, and is placed on a mounting surface such as a floor surface or a tatami mat. When the abdominal muscle strengthening tool is used, when the human body is in a lying position, the long groove space has a depth at which the spinal column portion of the human body does not contact the upper surface of the central portion, and the pair of left and right support portions. Has an inclined support surface that supports the waist or back corresponding to at least the back side of the navel, and the human body maintains the posture of lying on its back while keeping the abdominal muscles away from the mounting surface. On the other hand, when the abdominal muscle strengthening tool is not used, the pair of left and right support portions can be folded toward the lower surface side of the support portion via the central portion so as to face each other. (Invention according to claim 3).

Further, the abdominal muscle strengthening tool of the present invention is formed of a bendable material, and has a base portion having a predetermined shape to be placed on a mounting surface such as a floor or a tatami mat, and tip portions thereof at left and right portions on the upper surface of the base portion. It is an abdominal muscle strengthening tool composed of a pair of left and right support portions provided in a raised shape from the to the rear end portion and a long groove space formed between the opposite inner side surfaces of the support portion, and when the abdominal muscle strengthening tool is used. When the human body is in a posture of lying on its back, the long groove space is a recess facing the spinal column portion of the human body, and the pair of left and right support portions have a waist or back corresponding to at least the back side of the navel. It has a discontinuous slanted support surface to support, and the human body can strengthen the abdominal muscles while maintaining the posture of lying on the back and keeping the ankles away from the mounting surface, while the abdominal muscles. When the reinforcing tool is not used, the pair of left and right support portions have a gap in the central portion thereof that is substantially orthogonal to the elongated groove space and extends from the discontinuous inclined surface support surface to the bottom surface. The invention according to claim 5 is characterized in that it can be folded toward the bottom surface side in a state of facing each other via a central portion of the base portion located below.

(A) The inventions according to claims 1 and 3 can strengthen the abdominal muscles by keeping the back from the inclined support surface, and thus usually hurt ordinary people and the lumbar region. Suitable for people. In addition, the usual abdominal exercises, where you put your back on the floor or mat while lying on your back, have your assistant hold your ankles, fold your hands behind your neck, and preferably spread your elbows outward. In this state, the head is shaken upward to give momentum to the initial movement, and the upper body is bent by utilizing the rotation of the spine. In the embodiment of the present invention, the waist or back is supported by the inclined support surface. Since the abdominal muscles can be strengthened while the knees are bent and the heels of the feet are separated from the mounting surface, ordinary people and people with injured lower back can be trained without difficulty. Therefore, the abdominal muscles can be strengthened more reliably than the invention described in Patent Document 1.
Further, the pair of left and right support portions can be folded to face each other on the lower surface side thereof via the central portion or the central connecting portion of the base portion, and can be carried in a bag in the folded state. Therefore, it is excellent in portability.
(B) The invention according to claim 2 is that either the left and right pair of support portions are formed with a protruding acupressure portion or a spherical acupressure body is incorporated therein. , You can get the effect of acupressure while doing abdominal muscle exercise.
(C) In the invention according to claim 4, since the bendable material of the central connection portion is any of cloth, synthetic fiber, leather, and plastic having a flexible connection function, for example, the left and right support portions. The same abdominal muscle strengthening tool as that of the invention according to claim 1 can be obtained by joining the lower end portion of the above portion and the edge portion in the longitudinal direction facing parallel to each other in a step pattern (seam) shape. .. Therefore, the invention according to claim 4 can obtain the same problems and effects as the invention according to claim 1.
(D) In the invention according to claim 5, similarly to the invention according to claim 1, the abdominal muscles can be strengthened by keeping the back from the discontinuous inclined support surface. Further, the folding direction is different from that of the invention according to claim 1, and the pair of left and right support portions are bases in which the support portion on the front end side and the support portion on the rear end side are located below the gap in the width direction. It can be folded toward the bottom surface side of the support portion via the central portion of the portion so as to face each other. Therefore, the same problems as those of the invention according to claim 1 can be achieved.

1 to 6 are explanatory views showing the first embodiment of the present invention. 7 and 8 are explanatory views showing a second embodiment of the present invention. 9 to 13 are explanatory views showing a third embodiment of the present invention. 14 to 19 are explanatory views showing a fourth embodiment of the present invention. 20 to 22 are explanatory views showing a fifth embodiment of the present invention.
The perspective view of the first embodiment. FIG. 1 is a schematic cross-sectional view taken along line 2-2. FIG. 1 is a schematic cross-sectional view taken along line 3-3. An exploded perspective view. Explanatory drawing which shows an example of the folded state. Explanatory drawing at the time of use. The perspective view of the second embodiment. FIG. 7 is a schematic cross-sectional view taken along line 8-8. The perspective view of the third embodiment. FIG. 9 is a schematic cross-sectional view taken along line 10-10. An exploded perspective view. Explanatory view from a plan view. Explanatory drawing which shows an example of the folded state. The perspective view of the 4th embodiment. FIG. 14 is a schematic cross-sectional view taken along line 15-15. FIG. 14 is a schematic cross-sectional view taken along line 16-16. An exploded perspective view. Explanatory drawing which shows an example of the folded state. Explanatory drawing at the time of use. The perspective view of the fifth embodiment. An exploded perspective view. Explanatory drawing which shows an example of the folded state.

1 to 6 are explanatory views showing the abdominal muscle strengthening tool X according to the first embodiment of the present invention. First, a case where the abdominal muscle strengthening tool X is used will be described with reference to FIG. In FIG. 6, X is an abdominal muscle strengthening tool and Y is a human body. F is a placement surface such as a floor or tatami mat. The abdominal muscle strengthening tool X is placed on the mounting surface F.

Here, each part of the human body Y will be briefly described. a is the head (head), b is the neck (neck), c is the shoulder (shoulder), d is the back (back), e is the waist (the part corresponding to the back of the navel), and f is the abdomen (abdomen). , G is the leg (lower limb), h is the knee, i is the foot, j is the heel, and k is the arm. When strengthening the abdominal muscles, both arms or hands may be attached to the mounting surface F, or both hands may be folded behind to support the head a. Further, the knee h may be bent or extended.

In short, in order to strengthen the abdominal muscles (for example, the rectus abdominis muscle), the upper body including the head a to the shoulder c is not shaken in the vertical direction, while the back including the waist e from the inclined support surface of the mounting surface F. The heel j is separated from the mounting surface F for about 1 to 2 minutes while maintaining the state in which d is not separated. In that case, the knee h may be slightly expanded and contracted.

The abdominal muscle strengthening tool X of the first embodiment is formed of a bendable material, and is placed on a base portion 1 having a predetermined shape to be placed on a mounting surface such as a floor or tatami mat, and left and right portions on the upper surface of the base portion. It was formed between a pair of left and right support portions 10 and 10 provided in a raised shape from the front end portion to the rear end portion, a central portion of the upper surface 2 of the base portion, and opposite inner side surfaces 13 and 13 of the support portion. It is composed of a long groove space 20.

The base portion 1 is formed in a rectangular shape, for example, and the width (horizontal width) dimension and the front-back direction (longitudinal direction) dimension thereof are usually from the waist to the back of a general person (for example, a standard in his 40s). It is set appropriately in consideration of the size. Here, the "width" is, for example, the left and right sides of the paper surface with reference to FIG. 1, and the "front and back" is the front (tip portion) with reference to FIG. On the other hand, the upper side of the paper surface is the rear (rear end).
The material, structure, and thickness of the base portion 1 depend on the material, but any material may be used as long as it can be folded toward the lower surface 3 side of the base portion 1 via the central portion of the base portion 1.

Therefore, as the material of the base portion 1, an appropriate material is selected from cloth, leather, synthetic resin, synthetic leather, soft rubber, and the like. The base portion 1 is composed of a single flat member such as a sheet or a plate, and is composed of, for example, a rectangular plate-shaped hard member or an elastic member and a covering protective cover that encloses the entire hard member or the elastic member. It may consist of. As for the thickness of the base portion 1, the left and right ends where the bottom surfaces 11 of the support portions 10 are located may be slightly thicker than the central portion as long as the central portion thereof can be easily bent. The shape of the base portion 1 may be, for example, a hexagon or an ellipse, in addition to a rectangular shape (rectangular shape). The shape of the base portion 1 can be arbitrarily changed within a range that does not deviate from the subject of the invention.

Since the pair of left and right support portions 10 have the same configuration, they are designated by the same reference numerals for convenience of explanation. The support portion 10 has a gentle hill-like shape as a whole, and has a rectangular bottom surface (installation surface) 11, an outer surface 12 substantially orthogonal to the bottom surface 11, and the bottom surface 11 substantially parallel to the outer surface. An inner side surface 13 orthogonal to the above surface, and an upper surface (surface) 14 formed in a mountain-shaped or raised shape from the tip end portion 14a orthogonal to the tip end of the bottom surface 11 to the rear end portion 14b orthogonal to the rear end portion of the bottom surface 11. The upper surface (surface) 14 has a ridgeline portion (top) 14c at a portion closer to the rear end portion 14b.

Then, based on the ridgeline portion (top) 14c, the ridgeline portion (top) 14c is a gently inclined surface from the tip portion 14a, and the inclined surface is in a posture in which the human body Y is lying on its back as shown in FIG. When this happens, it becomes a support surface 15 that supports the waist e to the back d. Therefore, the slightly steep downhill slope 16 from the ridge (top) 14c to the rear end 14b is not used when strengthening the abdominal muscles. As shown in FIG. 3, the support portion 10 is made of one material (for example, a hard synthetic resin material). For example, a left-side view "substantially" -shaped support base body and the support base It may be composed of a cover body that wraps the entire main body. In this case, a flexible synthetic resin material or synthetic leather may be used for the cover body, but the support base body should be made of a synthetic resin material (for example, hard urethane) that does not easily lose its shape. preferable.

Further, the pair of left and right support portions 10 are provided on the left and right portions of the upper surface 2 of the base portion 1 in a raised shape from the front end portion 14a to the rear end portion 14b. For example, the base portion 1 and the support portion 10 are separate. When molded into a body, it is integrally attached to the upper surface 2 of the base portion 1 via the adhesive layer 17 shown in FIG. Of course, the base portion 1 and the support portion 10 are integrally formed by providing a plurality of mounting protrusions (not shown) on the edge portion of the lower end portion of the support portion 10 and attaching these mounting protrusions to the base portion 1. You may.

When the base portion 1 and the support portion 10 are integrally molded, the material of the support portion 10 that does not lose its shape is appropriately selected as described above. In this case, it is desirable that the pair of left and right support portions 10 are integrally formed as a "one unit" via the bendable connecting portion.

Therefore, the abdominal muscle strengthening tool X of the first embodiment is formed of a bendable material, and has a base portion 1 having a predetermined shape to be placed on a mounting surface F such as a floor or tatami mat, and an upper surface 2 of the base portion. A pair of left and right support portions 10 are provided in a raised shape from the front end portion 14a to the rear end portion 14b at the left and right portions of the support portion, and a long groove space 20 formed between the opposite inner side surfaces 13 of the support portions.

Then, when the abdominal muscle strengthening tool X is used, as shown in FIG. 6, when the human body Y is in the posture of lying on its back, the long groove space 20 is a recess facing the spinal column portion of the human body Y, and also. The pair of left and right support portions 10 have a gently inclined support surface 15 that supports the waist e to the back d corresponding to at least the back side of the navel, and the human body Y maintains a posture of lying on the back of the foot i. The abdominal muscles are strengthened with the heel j away from the placement surface F.

On the other hand, when the abdominal muscle strengthening tool X is not used, the pair of left and right support portions 10 are folded so as to face each other on the lower surface 3 side of the base portion via the central portion of the base portion 1, as shown in FIG. Can be done.

In this column, the second to fifth forms will be described. In explaining these embodiments, the same parts as those of the first embodiment are designated by the same or the same reference numerals, and duplicate description will be omitted. Moreover, since the mode of abdominal muscle exercise is the same, a duplicate description will be omitted.

First, FIGS. 7 and 8 are explanatory views showing the abdominal muscle strengthening tool X1 of the second embodiment. The main difference between the second embodiment and the first embodiment is that a plurality of spherical acupressure bodies are provided on the pair of left and right support portions 10A in order to obtain an acupressure effect as an addition of a secondary task. 18 are incorporated respectively. 7 and 8 show a total of three spherical acupressure bodies on the upper portion (surface portion) of the support portion 10A so as to be substantially half exposed from the inclined support surface 15 for convenience in order to briefly show the technical idea. 18 is detachably incorporated. In addition, the support portion 10A has an outer line of the surface 14 having a left-side view "he" character or a right-side view "he" character inverted in the horizontal direction in a "reverse direction" shape. When the side of the bottom surface 11 and the side of the inclined support surface 15 are connected, the shape is a long sideways tilted substantially triangular shape. Therefore, an injection molding machine (not shown) is used to mold the side into a slide shape with a hard synthetic resin material. At the molding stage, a plurality of hemispherical support recesses 19 are formed on the inclined support surface 15, and then spherical finger pressure bodies 18 are movably incorporated therein. Therefore, the position of the hemispherical support recess 19, the size of the spherical acupressure body 18, and the number of the support recess and the acupressure body 18 can be appropriately set in consideration of the acupressure effect.

The abdominal muscle strengthening tool X1 having the above configuration can obtain the effect of acupressure at the same time as strengthening the abdominal muscle in addition to the effect of the first embodiment. In the abdominal muscle strengthening tool X1 of the second embodiment, when the support portion 10A is molded from a hard synthetic resin material using an injection molding machine, a protrusion (for example, a hemisphere) is formed on the support surface 15 of the support portion 10A. The finger pressure part of the body) may be formed.

Next, FIGS. 9 to 13 are explanatory views showing the abdominal muscle strengthening tool X2 according to the third embodiment of the present invention. In this third embodiment, the main differences from the first embodiment are (a) that the sheet-shaped or plate-shaped base portion 1 is divided into three sheets, and (b) that the base portion 1 is divided. The three base pieces consist of a pair of left and right base pieces 1a and 1a in the shape of wide strips or strips, and a foldable central connecting portion 1b in the shape of a narrow strip connecting these base pieces 1a and 1a (c). ) The pair of left and right base pieces 1a and 1a are larger than the width of each bottom surface 11 of the corresponding support portions 10B and 10B. The parallel edge portions of 1b in the longitudinal direction are overlapped with each other, and (e) the bottom surface 11 of the corresponding support portion 10B formed of a hard material is formed on the upper surface of the pair of left and right base pieces 1a and 1a, respectively. It is integrally attached via an adhesive layer.

In the abdominal muscle strengthening tool X2, the base portion 1 is composed of three divided base pieces 1a, 1a, 1b, but the pair of left and right base pieces 1a, 1a are not used. , Only the central connecting portion 1b corresponding to the central portion of the abdominal muscle strengthening tool X2 may be used. In this case, a flange-shaped mounting protrusion is provided on either the longitudinal edge of the bottom surface 11 of the left and right support portions 10B or the edge of the lower end of the inner side surface, and is centrally connected to the mounting protrusion. It suffices to meet with the parallel edge portion in the longitudinal direction of the portion 1b in an overlapping state.

Therefore, the abdominal muscle strengthening tool X2 of the third embodiment connects the pair of left and right support portions 10B provided in a raised shape from the tip portion 14a to the rear end portion 14b, and the lower end portions of these support portions. It consists of a strip-shaped central connection portion 1b formed of a bendable material, and a long groove space 20 formed on the upper surface of the central connection portion and the opposite inner side surface 13 of the support portion, and a floor surface, a tatami mat, or the like is placed on it. It is placed on the surface F, and when the abdominal muscle strengthening tool X2 is used, when the human body Y is in a posture of lying on its back, the long groove space 20 has the spinal column portion of the human body at the central portion of the base portion 1. The depth is such that it does not contact the upper surface of the strip-shaped central connecting portion 1b in the embodiment, and the pair of left and right support portions 10B have an inclined support surface 15 that supports the waist or back corresponding to at least the back side of the navel. The human body Y can strengthen the abdominal muscles while maintaining the posture of lying on the back and keeping the heel j of the foot away from the mounting surface F, while the abdominal muscle strengthening tool X2 is not used. The pair of left and right support portions 10B can be folded toward the lower surface 11 side of the support portion 10B via a central portion (a band-shaped central connection portion 1b in the embodiment) so as to face each other.

In the above configuration, the bendable material of the central portion (central connecting portion 1b) is preferably any of cloth, synthetic fiber, leather, soft rubber, and plastic having a flexible connecting function. Even with this configuration, the same tasks as the abdominal muscle strengthening tool X of the first embodiment can be achieved.

Next, FIGS. 14 to 19 are explanatory views showing the abdominal muscle strengthening tool X3 according to the fourth embodiment of the present invention. The main difference between the fourth embodiment and the first embodiment is that a long laterally tilted substantially triangular portion 31 that is one step lower in order to form a long groove space 20 on the opposite inner side surfaces of the pair of left and right support portions 10C. Is a series of installations. Here, since the pair of left and right support portions 10C are symmetrical, the same reference numerals are given and overlapping description is omitted.

The support portion 10C of the abdominal muscle strengthening tool X3 has a gently inclined surface 31a which is one step lower than the inclined support surface 15 of the support portion 10C, for example, on the facing inner side surface 13 in the form of a long sideways tilting substantially triangle, and the inclined surface. This is a series of long groove space forming portions 31 having opposite inner side surfaces 31b in the form of a substantially triangular shape that is orthogonal to the sideways fall.

In addition, when the pair of left and right support portions 10C are fixed in parallel so as to face the left and right end portions of the base portion 1, as shown in FIG. 14, for example, a slit is formed on the upper surface of the central portion of the base portion 1. Alternatively, the streak groove portion 32 is completed.

Therefore, as shown in FIG. 18, the central portion of the base portion 1 can be folded toward the lower surface side of the support portion 10C so as to face each other via the slit or the streak groove portion 32. Even with this configuration, the same tasks as the abdominal muscle strengthening tool X of the first embodiment can be achieved.

Finally, FIGS. 20 to 22 are explanatory views showing the abdominal muscle strengthening tool X4 according to the fifth embodiment of the present invention. The main difference between the abdominal muscle strengthening tool X4 and the abdominal muscle strengthening tool X of the first embodiment is that the pair of left and right support portions 10D are supported at the substantially central portion via a gap 40 in the left-right direction (width direction) on the tip end side. It is divided into a portion 41 and a support portion 42 on the rear end side.

Therefore, the abdominal muscle strengthening tool X4 is formed of a bendable material like the abdominal muscle strengthening tool X, and has a predeterminedly shaped base portion 1 to be placed on a mounting surface F such as a floor or tatami mat, and the base portion. Abdominal muscles consisting of a pair of left and right support portions 10D provided in a raised shape from the tip end portion to the rear end portion on the left and right portions of the upper surface 2 and a long groove space 20 formed between the opposite inner side surfaces 13 of the support portions. It is a strengthening tool.

However, when the abdominal muscle strengthening tool X4 is used, when the human body is in a posture of lying on its back, the long groove space 20 is a recess facing the spinal column portion of the human body, and the pair of left and right support portions 10D The human body has a discontinuous inclined support surface 15 that supports the waist or back corresponding to at least the back side of the navel, and the human body separates the heel of the foot from the mounting surface F while maintaining a posture in a lying state. The abdominal muscles can be strengthened in the state, while when the abdominal muscle strengthening tool X4 is not used, the pair of left and right support portions 10D are substantially orthogonal to the long groove space 20 in the central portion and are discontinuous. By having a gap 40 from the inclined surface support surface 15 to the bottom surface, the bottom surface side (or the lower surface side of the base portion 1) faces each other via the central portion of the base portion 1 located below the gap. Can be folded.

The support base 10D of the abdominal muscle strengthening tool X4 is divided into four parts, left and right, front and back, as shown in FIG. 21, but each of the upper left and right or / and lower left and right divided bodies does not deviate from the subject of the invention. The bottom of the sill may be integrally connected with a bendable strip-shaped connecting piece.

<Additional notes>
When folding the pair of left and right support bases, the base portion may be folded in either the left-right direction or the front-back direction. Further, the inclined support surface 15 may be formed in a slightly curved shape in the outward direction or the inward direction (bottom side). The inclined support surface 15 may have a length from the waist e to the lower part of the back d. On the contrary, the inclined support surface 15 may have a length extending from the waist e to the vicinity of the shoulder c. A non-slip portion (for example, an uneven pattern provided on the peripheral surface of an automobile tire) may be provided on the lower surface 3 of the base portion 1. A storage bag for the abdominal muscle strengthening tools X to X4 may be added.

INDUSTRIAL APPLICABILITY The present invention can be used in the field of abdominal muscle strengthening tools that are placed on a floor surface of a home or a training gym, or a resting surface such as a tatami mat, and strengthen the abdominal muscles while maintaining a supine posture.

X to X4 ... Abdominal muscle strengtheners,
Y ... human body,
1 ... Base part,
1b ... Central portion of the base portion (including the central connecting portion),
2 ... The upper surface of the base part,
3 ... The underside of the base
10, 10A, 10B, 10C, 10D ... A pair of left and right support parts,
13 ... Opposing inner side surface,
14a ... The tip of the base,
14b ... Rear end of base,
15 ... Inclined support surface,
20 ... Long groove space,
e ... waist,
d ... back,
j ... heel,
31 ... Long groove space forming part,
40 ... gap,
41 ... Supporting part on the tip side,
42 ... Supporting portion on the rear end side.

Claims (5)

A base portion of a predetermined shape that is molded from a foldable material and is placed on a mounting surface such as a floor or tatami mat, and left and right portions on the upper surface of the base portion are provided in a raised shape from the front end portion to the rear end portion. It is an abdominal muscle strengthening tool composed of a pair of left and right support portions and a long groove space formed between the opposite inner side surfaces of the support portions.
When the human body is in a lying position when using the abdominal muscle strengthening tool, the long groove space is a recess facing the spinal column portion of the human body, and the pair of left and right support portions are at least behind the navel. It has an inclined support surface that supports the waist or back corresponding to the above, and the human body can strengthen the abdominal muscles while maintaining the posture of lying on the back and keeping the heel of the foot away from the mounting surface.
On the other hand, when the abdominal muscle strengthening tool is not used, the pair of left and right support portions can be folded toward the lower surface side of the base portion via the central portion of the base portion so as to face each other. .. The muscle strengthening tool according to claim 1 is characterized in that either the left and right pair of support portions are formed with a protruding acupressure portion or a spherical acupressure body is incorporated. Abdominal muscle strengthening tool. A pair of left and right support portions provided in a raised shape from the front end portion to the rear end portion, a band-shaped central portion that connects the lower end portions of these support portions and is formed of a bendable material, and this central portion. It is an abdominal muscle strengthening tool that is composed of a long groove space formed on the upper surface of the above surface and the opposite inner side surface of the support portion, and is placed on a floor surface, a tatami mat, or the like.
When the human body is in a posture of lying on its back when using the abdominal muscle strengthening tool, the long groove space has a depth at which the spinal column portion of the human body does not contact the upper surface of the central portion, and the pair of left and right support portions. Has an inclined support surface that supports the waist or back corresponding to at least the back side of the navel, and the human body keeps the posture of lying on its back while keeping the heel of the foot away from the mounting surface. Can be strengthened,
On the other hand, when the abdominal muscle strengthening tool is not used, the pair of left and right support portions can be folded toward the lower surface side of the support portion via the central portion so as to face each other. In the abdominal muscle strengthening tool of claim 3, the bendable material of the central portion is any one of cloth, synthetic fiber, leather, soft rubber, and plastic having a flexible connection function. Reinforcement tool. A base portion of a predetermined shape that is molded from a foldable material and is placed on a mounting surface such as a floor or tatami mat, and left and right portions on the upper surface of the base portion are provided in a raised shape from the front end portion to the rear end portion. It is an abdominal muscle strengthening tool composed of a pair of left and right support portions and a long groove space formed between the opposite inner side surfaces of the support portions.
When the human body is in a lying position when using the abdominal muscle strengthening tool, the long groove space is a recess facing the spinal column portion of the human body, and the pair of left and right support portions are at least behind the navel. It has a discontinuous inclined support surface that supports the waist or back corresponding to the above, and the human body strengthens the abdominal muscles while maintaining the posture of lying on the back and keeping the heel of the foot away from the mounting surface. Can be done
On the other hand, when the abdominal muscle strengthening tool is not used, the pair of left and right support portions each have a gap in the central portion substantially orthogonal to the elongated groove space and from the discontinuous inclined surface support surface to the bottom surface. An abdominal muscle strengthening tool that can be folded toward the bottom surface side in a state of facing each other via a central portion of the base portion located below the gap.

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