Posture corrector

Abstract

To provide a posture correction implement which varies a fulcrum level corresponding to the inclination of the pelvis and the curvature of the vertebra between in a standing posture and in a seated posture.SOLUTION: The posture correction implement is composed of a stretchable waist belt (2) and left and right stretchable shoulder belts (3, 4). The waist belt (2) comprises a hook-and-loop fastener. Hook-and-loop fasteners are also attached to at least the front ends of the left and right shoulder belts (3, 4). The hook-and-loop fasteners on the left and right shoulder belts (3, 4) are attached to be variable in position with respect to the hook-and-loop fastener on the waist belt (2).SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a posture correction device that is a combination of a waist belt and a shoulder belt, and a method for using the same. In particular, the present invention relates to a posture correction device that can be adjusted between a standing posture (standing position) and a sitting posture (sitting position), and a method for using the same. [Background technology]

[0002] As a posture correcting device that combines a waist belt and a shoulder belt, for example, Japanese Utility Model Application Publication No. 6-48621 and Japanese Utility Model Registration No. 3110653 are known.

[0003] However, these prior art publications make no mention of the possibility of changing or adjusting the seat position between a standing position and a sitting position, and judging from the drawings, this does not appear to be possible.

[0004] The spine physiologically curves forward and backward, and sits on the sacrum, which forms the pelvis. The fifth lumbar vertebra, which is in contact with the sacrum, is tilted about 30 degrees from the horizontal in order to obtain the physiological curvature of the spine, and in a standing posture, a force (shear force) that tries to slide forward is constantly acting on it. In this unstable relationship between the spine and pelvis, the tilt of the pelvis plays a major role in the curvature of the spine, and is the cause of poor posture. In addition, when sitting, the knees are bent, the muscles that tilt the pelvis forward are relaxed, and the lumbar lordosis decreases.

[0005] In this way, the tilt of the pelvis changes significantly between standing and sitting, and the curvature of the spine also changes. If you try to correct this by pulling the shoulder belt to expand the rib cage and straighten the back, some kind of measure will be necessary to correct the tilt of the pelvis and the curvature of the spine. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Utility Model Application No. 6-48621 [Patent Document 2] Utility model registration No. 3110653 Summary of the Invention [Problem to be solved by the invention]

[0007] Based on the above viewpoint, the present invention aims to provide a posture correction device that changes the fulcrum level in accordance with the inclination of the pelvis and the curvature of the spine when the person is standing and when the person is sitting. [Means for solving the problem]

[0008] The present invention is a posture correction device having an expandable waist belt and expandable left and right shoulder belts, wherein the waist belt has a first engaging device and a second engaging device is attached to at least the front end of the left and right shoulder belts, wherein the second engaging device of the shoulder belt is engageable with the first engaging device of the waist belt, the engagement position of the second engaging device and the first engaging device is selectable between a first engagement position when the wearer is in a standing posture and a second engagement position when the wearer is in a sitting posture, the second engagement position when the wearer is in the sitting posture is higher than the first engagement position when the wearer is in the standing posture, and further, the first engagement position and the second engagement position are separate from each other and each occupy a pre-designated position.

[0009] The first engaging device and the second engaging device may be hook-and-loop fasteners, or one may be a hook and the other a hook receiver (for example, a D-ring).

[0010] The waist belt and the left and right shoulder belts may be separable into three independent portions.

[0011] In this case, the shoulder belt has a ring portion on the upper half and a straight portion on the lower half, the ring portion being the part through which the wearer passes their shoulder, and the hook-and-loop fastener at the front end of the straight portion can be engaged with the hook-and-loop fastener of the waist belt.

[0012] In another embodiment, the shoulder belts each may be made up of a straight portion, the hook and loop fastener at the front end of the straight portion being engageable with the hook and loop fastener of the waist belt.

[0013] In another embodiment, rather than making the waist belt and the left and right shoulder belts into three independent parts, the rear ends of the waist belt and the shoulder belts are fixed, and the hook-and-loop fasteners at the front ends of the shoulder belts can be engaged with the hook-and-loop fasteners of the waist belts.

[0014] The waist belt may consist of two wide belts arranged slightly offset from one another above and below, and of the two wide belts, the lower waist belt may be configured to support the wearer's buttocks.

[0015] Alternatively, the waist belt may be a single wide belt.

[0016] In yet another embodiment, the waist belt may be of a pants type having a patch cloth attached to the front with which the first engaging member engages.

[0017] In yet another embodiment, the waist belt may be of a trouser type having a patch with which the first engaging member engages attached to the front.

[0018] As an additional element, one elastic auxiliary cord may be extended diagonally downward from each of the left and right lower ends of the wide belt, and a third engagement device may be attached to the end of each auxiliary cord.

[0019] The present invention also relates to a method of using the posture correction device, characterized in that the position at which the second engaging device of the shoulder belt is engaged with the first engaging device of the waist belt 2 is higher when the wearer is in a sitting position than when the wearer is in a standing position.

[0020] Preferably, the shoulder belts are attached so as to cross over the wearer's back in use.

[0021] More preferably, movement of the shoulder belt is restricted by a retaining member (e.g., a small band) provided at the position where the shoulder belt crosses on the wearer's back when in use. Effect of the Invention

[0022] According to the present invention, by changing the position of the straight portion of the shoulder belt between the standing and sitting positions, it is easy to change the position of the crossing portion (fulcrum level) of the shoulder belt. By changing the position of the fulcrum level, it is possible to effectively correct the back muscles in each posture. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is a rear perspective view of a posture correcting device according to one embodiment of the present invention when worn. [Diagram 2] FIG. 2A is a front view and FIG. 2B is a rear view of the posture corrector when worn. [Diagram 3] 1 is a diagram showing three components that make up the posture corrector, where (a) is a front view of the waist belt, (b) is a back view of the waist belt, (c) is a front view of the left shoulder belt, (d) is a back view of the left shoulder belt, (e) is a front view of the right shoulder belt, and (f) is a back view of the right shoulder belt. [Figure 4] FIG. 2A is a front view and FIG. 2B is a rear view of the posture corrector when the three components are assembled. [Diagram 5] 1A and 1B are front views of a person wearing the posture corrector, in which (a) is a standing posture and (b) is a sitting posture. [Figure 6] 1A and 1B are side views of a person wearing the posture corrector, in which (a) is a standing posture and (b) is a sitting posture. [Figure 7] 1A and 1B are rear views of a person wearing the posture corrector, in which (a) is a standing posture and (b) is a sitting posture. [Figure 8] 11A and 11B are a front view and a rear view, respectively, of a posture correcting device according to a second embodiment of the present invention when worn. [Figure 9] FIG. 2A is a front view and FIG. [Figure 10] 11A and 11B are a front view and a rear view, respectively, of a posture correcting device according to a third embodiment of the present invention when worn. [Figure 11] FIG. 2A is a front view and FIG. [Figure 12] 13A and 13B are a front view and a rear view, respectively, of a posture correcting device according to a fourth embodiment of the present invention when worn. [Figure 13] FIG. 2A is a front view and FIG. [Figure 14] 13A and 13B are a front view and a rear view, respectively, of a posture correcting device according to a fifth embodiment of the present invention when worn. [Figure 15] FIG. 2A is a front view and FIG. [Figure 16] 13A and 13B are a front view and a rear view, respectively, of a posture correcting device according to a sixth embodiment of the present invention when worn. [Figure 17] FIG. 2A is a front view and FIG. [Figure 18] 13A and 13B are a front view and a rear view, respectively, of a posture correcting device according to a seventh embodiment of the present invention when worn. [Figure 19] FIG. 2A is a front view and FIG. [Figure 20] 13A and 13B are a front view and a rear view, respectively, of a posture correcting device according to an eighth embodiment of the present invention when worn. [Figure 21] FIG. 2A is a front view and FIG. [Figure 22] 13A and 13B are a front view and a rear view, respectively, of a posture correcting device according to a ninth embodiment of the present invention when worn. [Figure 23] FIG. 2A is a front view and FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. EXAMPLES

[0025] As shown in Figures 1 to 4, the posture corrector of the first embodiment has a waist belt 2 and left and right shoulder belts 3 and 4. These three belts 2, 3, and 4 can be separated into three parts as shown in Figure 3, and are combined and integrated using hook-and-loop fasteners when in use.

[0026] The waist belt 2 has hook-and-loop fasteners 22-24 attached to the left and right ends thereof, and the left and right ends are attachable to each other and to hook-and-loop fasteners 33, 43 at the ends of the shoulder belts and hook-and-loop fasteners 28, 29 on auxiliary straps 26, 27 of the waist belt, which will be described later.

[0027] The waist belt 2, as shown in Figs. 3(a) and (b), is formed by fixing the left and right ends of two stretchable wide belts 20, 21 together.

[0028] The two wide belts 20, 21 are arranged with a slight vertical offset, so that their central portions do not overlap, forming an empty space 25. Of the two waist belts, the lower wide belt 21 supports the wearer's buttocks over a wide area (see FIG. 1).

[0029] Thin elastic auxiliary strings 26, 27 extend obliquely downward from the left and right lower ends of the lower wide belt 21. Hook and loop fasteners 28, 29 are also attached to the ends of the auxiliary strings.

[0030] The left and right shoulder belts 3, 4 have the same structure, but are mirror images of each other because they are attached to the left and right shoulders, respectively. Since it is difficult to distinguish between left and right at a glance, it is preferable to mark or label them with letters such as "for left, inside" and "for right, inside".

[0031] The left and right shoulder belts 3, 4 are made of wide elastic belts, and have ring sections 31, 41 on the upper half and straight sections 32, 42 on the lower half. The ring sections 31, 41 are the sections through which the wearer passes his / her shoulders. The straight sections 32, 42 also have hook-and-loop fasteners 33, 43 attached to the ends thereof, which can be attached to hook-and-loop fasteners 23, 24 of the waist belt 2.

[0032] The three parts assembled are shown in Figure 4. When in use, the left and right shoulder belts 3, 4 are positioned so that they cross each other, and the hook-and-loop fasteners 33, 43 on their straight portions are attached to the hook-and-loop fasteners 23, 24 on the left and right ends of the waist belt, thereby integrating the three parts.

[0033] The posture corrector 1 worn by a user is shown in Fig. 1 and Fig. 2. When viewed from the front, the front of the waist belt 2, the front of the ring parts 31, 41 of the shoulder belts 3, 4, and the ends of the straight parts 32, 42 are visible (Fig. 2(a)). When viewed from the back, the waist belts 20, 21 separated into two, the back of the ring parts 31, 41 of the left and right shoulder belts 3, 4, and the straight parts 32, 42 of the left and right shoulder belts are visible (Fig. 1 and Fig. 2(b)). The intersection 5 of the left and right shoulder belts 3, 4 looks like an asterisk ("*") where a horizontal line and an X-shaped line overlap. The height of this intersection 5 can be considered as the fulcrum level of the posture corrector 1.

[0034] Two thin auxiliary cords 26, 27 of the waist belt extend across the wearer's crotch area, and hook-and-loop fasteners 28, 29 at their ends are attached to hook-and-loop fasteners 23, 24 of the waist belt 2 (Figs. 1 and 2). The auxiliary cords 26, 27 are not essential to the present invention, but they are useful for stabilizing the waist by applying an appropriate pressure to the buttocks and crotch area.

[0035] With this posture correcting device 1 attached, adjustment according to the standing posture and the sitting posture is performed as follows (see Figs. 5 to 7).

[0036] First, when standing, the back is tense and the lower back is arched, which makes the lumbar vertebrae more likely to curve forward. To correct this, it is advisable to set the fulcrum level of the posture corrector 1 (shown by the dashed line in Fig. 7) at the lower part of the thoracic vertebrae. To do this, the position at which the wearer takes the end hook-and-loop fasteners 33, 43 of the straight parts 32, 42 of the shoulder belt and fastens them to the waist belt 2 is lowered (see Figs. 5(a) and 6(a)). This lengthens the shoulder belts 3, 4, which provides greater tension.

[0037] In a sitting position, the knees are bent, the muscles that tilt the pelvis forward are relaxed, and the lumbar lordosis is reduced, making it easy to hunch back. To correct this, the fulcrum level is set at the upper thoracic vertebrae, and the rib cage is expanded in a concentrated manner. To do this, the position where the wearer takes the end hook-and-loop fasteners 33, 43 of the straight parts 32, 42 of the shoulder belt and fastens them to the waist belt 2 is raised (see Fig. 5(b) and Fig. 6(b)). This reduces the feeling of pressure when sitting. EXAMPLES

[0038] In the second embodiment (FIGS. 8 and 9), the same parts as those in the first embodiment are designated by the letter "A" after the reference numerals in the first embodiment, and detailed explanations thereof will be omitted. The second embodiment differs from the first embodiment mainly in the following two points. (1) The left and right shoulder belts 3A, 4A and the waist belt 2A are not completely separate, and the rear ends of the shoulder belts are sewn to the waist belt 2A to form fixed parts 34A, 44A. (2) The left and right shoulder belts 3A, 4A do not form ring portions, and each of the left and right shoulder belts is a single belt 32A, 42A.

[0039] In the second embodiment, adjustment according to the standing and sitting postures is possible, similar to the first embodiment, by changing the positions of the front end surface fasteners 33A and 43A of the shoulder belts 3A and 4A according to the standing and sitting postures. EXAMPLES

[0040] In the third embodiment (FIGS. 10 and 11), the same parts as those in the first embodiment are denoted by the letter "B" after the reference numerals in the first embodiment, and detailed description thereof will be omitted. The third embodiment differs from the first embodiment mainly in the following three points. (1) The shoulder belts 3B, 4B and the waist belt 2B are not completely separate, and the rear ends of the shoulder belts are sewn to the waist belt 2B to form fixed portions 34B, 44B. (2) The left and right shoulder belts 3B, 4B do not form ring portions, and each of the left and right shoulder belts is a single belt. (3) The left and right belts 3B, 4B rise straight up from the waist belt 2B along the wearer's back, pass over the shoulders, go around the back again, cross each other here, and then attach to the waist belt 2B.

[0041] The third embodiment allows adjustment according to the standing and sitting postures, similar to the first and second embodiments. That is, the positions of the front end surface fasteners 33B and 43B of the shoulder belts 3B and 4B are changed according to the standing and sitting postures. EXAMPLES

[0042] In the fourth embodiment (FIGS. 12 and 13), the same parts as those in the first embodiment are designated by the letter "C" after the reference numerals in the first embodiment, and detailed explanations thereof will be omitted. The fourth embodiment differs from the first embodiment mainly in the following three points. (1) The shoulder belts 3C, 4C and the waist belt 2C are not separate, but form a running shirt-style wide portion 20C behind the shoulder belts. (2) The left and right shoulder belts 3C, 4C do not form a ring portion, and each is a single belt except for the wide portion 20C for the left and right shoulders which is integrated at the back. (3) At the intersection of the left and right shoulder belts 3C, 4C, a belt presser 51C is provided to prevent the belts from moving. The belt presser 51C is, for example, a small band that holds the shoulder belts.

[0043] In the fourth embodiment, adjustment according to the standing and sitting postures is possible, similarly to the first to third embodiments, that is, the positions of the front end surface fasteners 33C, 43C of the shoulder belts 3C, 4C are changed according to the standing and sitting postures. EXAMPLES

[0044] In the fifth embodiment (FIGS. 14 and 15), the same parts as those in the first embodiment are designated by the letter "D" after the reference numerals in the first embodiment, and detailed explanations thereof will be omitted. The fifth embodiment differs from the first embodiment mainly in the following four points. (1) The shoulder belts 3D, 4D and the waist belt 2D are not separate, but form a running shirt-like wide portion 20D behind the shoulder belts. (2) The waist belt 2D does not have attachable left and right ends, and is shaped like a pair of pants. (3) A patch 6D having a hook-and-loop fastener is attached to the front of the pants-type waist belt 2D, and the hook-and-loop fasteners at the front ends of the shoulder belts can be attached to the hook-and-loop fasteners of this patch 6D. (4) At the intersection of the left and right belts 3D and 4D, a belt presser 51D is provided to prevent the belts from moving. The belt presser 51D is, for example, a small band that holds down the shoulder belt.

[0045] The fifth embodiment allows adjustment according to the standing and sitting postures, similarly to the first to fourth embodiments, that is, the positions of the front end surface fasteners 33D, 43D of the shoulder belts 3D, 4D are changed according to the standing and sitting postures. EXAMPLES

[0046] In the sixth embodiment (FIGS. 16 and 17), the same parts as those in the first embodiment are designated by the letter "E" after the reference numerals in the first embodiment, and detailed explanations thereof will be omitted. The sixth embodiment differs from the first embodiment mainly in the following five points. (1) The shoulder belts 3E, 4E and the waist belt 2E are not completely separate, and the rear ends of the shoulder belts 3E, 4E are sewn to the waist belt 2E to form fixed parts 34E, 44E. (2) The left and right shoulder belts 3E, 4E do not form ring portions, but are each a single belt. (3) It does not have left or right ends to which a waist belt can be attached, and is structured like a single pair of pants. (4) A patch 6E having a hook-and-loop fastener is attached to the front of the pants-type waist belt 2E, and the hook-and-loop fastener at the front end of the shoulder belt can be attached to the hook-and-loop fastener of the patch 6E. The patch 6 is preferably made of stiff, hard cloth or leather. (5) The left and right belts 3E, 4E rise straight up from the waist belt 2E along the wearer's back, pass over the shoulders and then go around the back again, where they cross each other and are then attached to the hook-and-loop fastener of the waist belt 2E patch 6E.

[0047] In the sixth embodiment, adjustment according to the standing and sitting postures is possible, similarly to the first to fifth embodiments, that is, the positions of the front end surface fasteners 33E, 43E of the shoulder belt are changed according to the standing and sitting postures. EXAMPLES

[0048] In the seventh embodiment (FIGS. 18 and 19), the same parts as those in the first embodiment are designated by the letter "F" after the reference numerals in the first embodiment, and detailed explanations thereof will be omitted. The seventh embodiment differs from the first embodiment mainly in the following two points. (1) It does not have left or right ends to which a waist belt can be attached, and is structured like a single pair of pants. (2) A tape-like patch 6F having multiple D-rings (two or four on each side in the figure) is attached to the front of this pants-type waist belt 2F. The patch 6F is preferably made of stiff, hard cloth or leather. Hooks 33F, 43F are attached to the front ends of the shoulder belts. The shoulder belt hooks 33F, 43F can engage with either of the D-rings 61F. Separately, the front end hooks 33F, 43F of the shoulder belts can selectively engage with another D-ring 63F located in a higher position.

[0049] In the seventh embodiment, adjustment according to the standing posture and the sitting posture is possible, similarly to the first to sixth embodiments. That is, the engagement position between the hook 33F, 43F at the front end of the shoulder belt and one of the D-rings 61F or the higher D-ring 63F is selectively changed according to the standing posture and the sitting posture. EXAMPLES

[0050] In the eighth embodiment (FIGS. 20 and 21), the same parts as those in the first embodiment are designated by the reference numerals of the first embodiment followed by "G" and detailed description thereof will be omitted. The eighth embodiment differs from the first embodiment mainly in the following two points. (1) It does not have left or right ends to which a waist belt can be attached, and is structured like a single pair of pants. (2) A patch 6G having a hook-and-loop fastener is attached to the front of the pants-type waist belt 2G, and the hook-and-loop fastener at the front end of the shoulder belt can be attached to the hook-and-loop fastener of the patch 6G. The patch 6G is preferably made of firm, hard cloth or leather. In the eighth embodiment, the patch 6G is not a single piece of cloth, but is made of four small pieces of cloth 62G. The position and shape of the patch 6G can be changed in various ways in consideration of usability.

[0051] In the eighth embodiment, adjustment according to the standing and sitting postures is possible, similarly to the first to seventh embodiments. That is, the attachment positions of the front end surface fasteners 33G, 43G of the shoulder belt and the small piece 62G of the pad 6G are changed according to the standing and sitting postures. EXAMPLES

[0052] In the ninth embodiment (FIGS. 22 and 23), the same parts as those in the first embodiment are designated by the letter "H" after the reference numerals in the first embodiment, and detailed description thereof will be omitted. The ninth embodiment differs from the first embodiment mainly in the following three points. (1) It does not have left or right ends to which a waist belt can be attached, and is structured like a single pair of long pants. (2) A patch 6H having one D-ring 61H on each side is attached to the front of the long-pants-type waist belt 2H, and the front end hooks 33H, 43H of the shoulder belts can engage with the D-rings 61H of the patch 6H. Separately, the front end hooks 33H, 43H of the shoulder belts can selectively engage with another D-ring 63H located at a higher position. (3) The patch 6H is often made of stiff, hard cloth or leather, so it is provided with a relief 65H so that it does not get in the way when bending forward or bending the knees. The relief 65H can be, for example, a slit-like opening extending horizontally.

[0053] In the same manner as in the first to eighth embodiments, the ninth embodiment allows adjustment according to the standing and sitting postures. That is, the attachment positions of the front end hooks 33H, 43H of the shoulder belt and the D-rings 61H, 63H of the pad 6H are changed according to the standing and sitting postures. [Explanation of symbols]

[0054] 1 Posture corrector 2,2A~2H Waist belt 20,21 Wide elastic belt 20C, 20D wide part 22~24 hook and loop fastener 25 Space 26,26A,26B,26C Auxiliary string 27,27A,27B,27C Auxiliary string 28,29 Velcro 3,3A~3H Shoulder belt 4,4A~4H Shoulder belt 31, 31F, 31G, 41, 41F, 41G, 41H Shoulder belt ring 32, 32A~32H Shoulder belt straight section 42, 42A~42H Shoulder belt straight section 33,33A~33G Front side engagement tool 43,43E~43G Front engagement tool 5 Intersection (support level height) 51C, 51D Holding part 6D, 6E, 6F, 6G, 6H Patch 61F, 61H D-ring 62G Small patch 65H Relief

Claims

1. A posture correction device having an expandable waist belt (2G, 2H) and expandable left and right shoulder belts (3G, 3H; 4G, 4H), The waist belt (2G, 2H) has a first engagement device (6G, 6H), In the above-mentioned left and right shoulder belts (3G, 3H; 4G, 4H), second engaging members (33G, 33H, 43G, 43H) are attached to at least the front end portions thereof, a second engaging member (33G, 33H, 43G, 43H) of the shoulder belt (3G, 3H; 4G, 4H) is engageable with a first engaging member (6G, 6H) of the waist belt (2G, 2H); an engagement position between the second engagement device (33G, 33H, 43G, 43H) and the first engagement device (6G, 6H) can be selected between a first engagement position (61G, 61H) when the wearer is in a standing posture and a second engagement position (63G, 63H) when the wearer is in a sitting posture, The second engagement position (63G, 63H) in the sitting posture is higher than the first engagement position (61G, 61H) in the standing posture, Furthermore, the first engagement positions (61G, 61H) and the second engagement positions (63G, 63H) are separated from each other and each occupies a pre-designated position. A posture correction device characterized by:

2. 2. The posture correction device according to claim 1, wherein the first engaging member (6G) and the second engaging member (33G, 43G) are hook-and-loop fasteners.

3. 2. The posture correction device according to claim 1, wherein the first engaging member (6H) and the second engaging member (33H, 43H) are a combination of a hook and a hook receiver.

4. 4. The posture correction device according to claim 1, wherein the waist belt (2G, 2H) and the left and right shoulder belts (3G, 3H; 4G, 4H) are separable into three independent parts.

5. The shoulder belt (3G, 3H, 4G, 4H) has a ring portion (31G, 31H, 41G, 41H) provided in the upper half and a straight portion (32G, 32H, 42G, 42H) provided in the lower half. 2H), The ring portion (31G, 31H, 41G, 41H) is a portion through which a wearer passes the shoulder, A posture correction device as described in any one of claims 1 to 4, wherein a second engagement device (33G, 33H, 43G, 43H) at a front end of the straight portion (32G, 32H, 42G, 42H) is selectively engageable with the first engagement position (61G, 61H) or the second engagement position (63G, 63H) of the first engagement device (6G, 6H) of the waist belt (2G, 2H).

6. 2. The posture correction device according to claim 1, wherein the waist belt (2G) is a pants-type belt (21G) having a patch (6G) that serves as a hook-and-loop fastener.

7. 2. The posture correction device according to claim 1, wherein the waist belt (2H) is a long-pants type (21H) having a patch (6H) which serves as a hook-and-loop fastener.

8. 8. The posture correction device according to claim 7, wherein the padding cloth (6H) of the waist belt (2H) is provided with a relief portion (65H) so as not to be an obstacle when bending forward or bending the knees.

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