Belt adjustment retaining device

Abstract

The strap adjustment holding device of the present application is provided with: a device main body (2) having a strap insertion portion (21) formed so as to be insertable with a strap (1) and an opening portion (22) communicating with the strap insertion portion; and a strap return member (3) having a return portion (31) formed so as to be able to return the strap in the opening portion and a grip portion (32), formed so as to be able to advance and retreat within the device main body. A standing wall portion (212T, 213T) rising in a step shape is formed in the upper and lower inner wall surfaces (212, 213) of the strap insertion portion, and a protrusion portion (33) is formed on the return portion, the protrusion portion (33) causing the strap to bend in a substantially step shape between the protrusion portion (33) and the standing wall portion in a retreated position of the strap return member, and releasing the bending of the strap in an advanced position.

Description

Technical Field

[0001] This invention relates to an adjustment and holding device, for example to a fastener used as a buckle for a trouser strap, a backpack, a handbag with a strap, a waist bag, a helmet, etc., which is configured to adjust the length of at least one strap and hold the adjusted strap. Background Technology

[0002] Generally, in fasteners such as buckles for trouser straps, backpacks, handbags with straps, waist bags, helmets, etc., it is known to have a strap adjustment retaining device that can adjust the length of at least one strap and hold the adjusted strap. Such a strap adjustment retaining device is disclosed, for example, in Patent Documents 1 and 2.

[0003] Here, in the buckle 100 disclosed in Patent Document 1, as Figure 25 As shown, at the base end of the snap fastener 103, which is inserted into and engaged with the opening 102 of the buckle body 101, a fold-back portion 105 and a snap-fit ​​portion 106 are arranged on the surface and back sides of the buckle 100 in a vertically separated manner to adjust the length of the strap 104. The fold-back portion 105 wraps around and folds back the strap 104, and the snap-fit ​​portion 106 overlaps the folded-back strap 104. Thus, by using the snap-fit ​​portion 106 to bend the strap 104, which has been folded back by the fold-back portion 105, into a roughly right-angle shape and overlap it in the vertical direction, the adjusted strap 104 is prevented from loosening.

[0004] In addition, such as Figure 26 As shown, Patent Document 2 discloses a buckle 200 comprising a buckle body 203, an elastic contact plate 204, and a pressing member 205. The buckle body 203 has a fixing member 202 for fixing one end 201a of the strap. The elastic contact plate 204 elastically contacts the strap when the other end 201b of the strap passes through the buckle body 203. The pressing member 205 presses the elastic contact plate 204 toward the strap. The pressing member 205 has an adjustment mechanism 206 for adjusting the force applied to the elastic contact plate 204 to absorb differences in the thickness of the strap. Furthermore, the adjustment mechanism 206 is configured such that the pressing member 205 can be retracted or extended by rotating an exposed thickness adjustment knob 207 with a fingertip.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2002-65315;

[0008] Patent Document 2: Japanese Patent Application Publication No. 2012-232076. Summary of the Invention

[0009] The problem the invention aims to solve

[0010] However, in the buckle 100 disclosed in Patent Document 1, since the belt fold-back portion 105 and the belt locking portion 106 are separately arranged on the surface and back sides of the buckle 100, the thickness of the buckle 100 is prone to be too large, resulting in inconvenience in use and an unattractive appearance. Furthermore, when adjusting the length of the belt 104, the buckle 100 must be lifted or the belt locking portion 106 must be deformed to loosen the pressing pressure of the belt locking portion 106 folding the belt 104, making the adjustment operation cumbersome. Moreover, when the belt 104 is not in use, the tension is not applied to the belt 104, and the pressing pressure of the belt locking portion 106 disappears, making belt shifting easy. Therefore, adjustment is required every time the belt 104 is used, further complicating the adjustment process.

[0011] Furthermore, the buckle 200 disclosed in Patent Document 2 includes an elastic contact plate 204 and a pressing member 205. The elastic contact plate 204 elastically contacts the strap when the other end 201b of the strap passes through the buckle body 203. The pressing member 205 presses the elastic contact plate 204 in the direction of the strap. The pressing member 205 is equipped with an adjustment mechanism 206 for adjusting the force of pressing the elastic contact plate 204 to absorb the difference in the thickness of the strap. Therefore, whenever the other end 201b of the strap is removed from the buckle body 203, the adjustment mechanism 206 needs to be adjusted to adjust the force of the pressing member 205 pressing the elastic contact plate 204, which results in a complicated adjustment operation.

[0012] The present invention was made to solve the above-mentioned problems, and its purpose is to provide a belt adjustment and holding device that has a thickness that is not too large, can easily adjust and maintain the length of the belt, and does not require readjustment for each use.

[0013] Technical means to solve the problem

[0014] One aspect of the present invention for solving the above-mentioned problems is a belt adjustment and holding device, which is configured to adjust the length of at least one belt and hold the adjusted belt. The device comprises: a device body having a belt insertion portion and an opening; the belt insertion portion being formed in a generally rectangular shape at its rear end so as to allow the belt to be inserted forward; the opening communicating with the belt insertion portion and being formed in a generally rectangular shape along a vertical direction orthogonal to the insertion direction of the belt; and a belt folding member having a folding portion and a gripping portion; the folding portion being configured to wrap the belt around its front end in the opening and fold back backward; the gripping portion being formed at the rear end of the folding portion and being configured to... The tape folding member, which can protrude rearward from the tape insertion portion together with the folded-back tape, is formed to move forward and backward within the main body of the device and is generally plate-shaped. On the upper and lower inner wall surfaces of the tape insertion portion, between the left and right side wall portions, there are vertical wall portions that are stepped inward on the side of the opening portion and formed in a generally continuous manner along the tape width direction. A protrusion is formed on at least one of the upper and lower end surfaces of the folding portion. The protrusion moves to a position near the rear of the vertical wall portion in the retracted position of the tape folding member, causing the tape to bend in a generally stepped shape between the protrusion and the vertical wall portion. In the forward position of the tape folding member, it moves into the opening portion and releases the bending of the tape.

[0015] The adjustable holding device provided by the present invention is preferably provided in which the upper end face and the lower end face of the folded-back portion are formed parallel to each other, and the protrusion portion has a front wall surface that is vertically erected relative to the upper end face or the lower end face and a rear inclined surface that is obliquely inclined at an acute angle relative to the upper end face or the lower end face.

[0016] The adjustable retaining device provided by the present invention preferably has multiple protrusions formed at different positions on the upper and lower end faces of the folded-back portion in the belt width direction. A first protrusion protruding inward at a position opposite to the protrusions formed on the upper inner wall portion is formed on the vertical wall portion formed on the upper inner wall portion. A second protrusion protruding inward at a position opposite to the protrusions formed on the lower inner wall portion is formed on the vertical wall portion formed on the lower inner wall portion. The belt folding member is configured to move forward and backward in the device body in a vertically inverted state.

[0017] The adjustable retaining device provided by the present invention preferably has a first inclined surface that is inclined upward toward the upper inner wall surface at the rear end side of the first protrusion, and a second inclined surface that is inclined downward toward the lower inner wall surface at the rear end side of the second protrusion.

[0018] The adjustable retaining device provided by the present invention preferably has guide grooves formed on the left and right sidewalls of the main body of the device in the front-back direction, which allow the belt folding member to move between the forward and backward positions. Guide protrusions that engage with the guide grooves are formed on the left and right outer ends of the folding part. The folding part is formed by separating the left and right sides of the central part in the belt width direction, and the separated left and right folding parts are connected to form an approximately U-shape via the gripping part.

[0019] The adjustable retaining device provided by the present invention preferably includes a snap fastener, wherein the snap fastener has a length-fixing strap fixed at its base end and a locking claw formed at its top end. A snap fastener storage portion and a locking protrusion are formed at the front end of the opening on the main body of the device. The snap fastener storage portion stores the snap fastener in a detachable manner, and the locking protrusion is located inside the snap fastener storage portion and engages with the locking claw of the snap fastener.

[0020] The adjustable retaining device provided by the present invention preferably has a retaining frame formed on the front end side of the opening on the main body of the device, and a length-fixing strap is fixed on the retaining frame.

[0021] The adjustable retaining device provided by the present invention preferably has a generally rectangular second strap insertion portion formed at the front end of the opening on the main body of the device, which allows for the rearward insertion of a second strap for length adjustment. The adjustable retaining device includes a second strap folding member, which has a second folding portion and a second gripping portion. The second folding portion is configured to wrap around the second strap in the opening towards the rear and fold forward. The second gripping portion is formed at the front end of the second folding portion and is configured to protrude forward from the second strap insertion portion together with the folded-back second strap. The second strap folding member is formed... To allow for forward and backward movement within the main body of the device, the device is generally plate-shaped. A second vertical wall portion, which is stepped and erected inwards on the opening side, is formed on the upper and lower inner wall surfaces of the second belt insertion portion in a generally continuous manner along the belt width direction. A second protrusion is formed on at least one of the upper and lower end surfaces of the second fold-back portion. When the second protrusion moves to a position close to the front of the second vertical wall portion in the forward position of the second belt fold-back member, the second belt bends in a generally stepped manner between the second protrusion and the second vertical wall portion. When the second belt fold-back member moves to a position in the backward position, it moves into the opening, thus releasing the bend of the second belt.

[0022] The belt adjustment and holding device provided by the present invention preferably has multiple second protrusions formed at different positions on the upper and lower end faces of the second fold-back portion in the belt width direction. A third protrusion is formed on the second vertical wall portion formed on the upper inner wall surface of the second belt insertion portion, which protrudes inward at a position opposite to the second protrusions formed on the upper end face of the second fold-back portion. A fourth protrusion is formed on the second vertical wall portion formed on the lower inner wall surface of the second belt insertion portion, which protrudes inward at a position opposite to the second protrusions formed on the lower end face of the second fold-back portion. The second belt fold-back member is configured to move forward and backward in the device body in a vertically inverted state.

[0023] The adjustable retaining device provided by the present invention preferably includes a second fastener, the second fastener having a third strap for length adjustment fixed at its base end side in an adjustable manner, a locking claw formed at its top end side, and a fastener receiving portion and a locking protrusion formed at the front end side of the opening on the main body of the device. The fastener receiving portion receives the second fastener in a detachable manner, and the locking protrusion is located inside the fastener receiving portion and engages with the locking claw of the second fastener.

[0024] The adjustable retaining device provided by the present invention preferably includes a third strap insertion portion and a second opening portion at the base end of the second fastener. The third strap insertion portion is formed in a generally rectangular shape so that the third strap can be inserted from the front end to the rear. The second opening portion communicates with the third strap insertion portion and is formed in a generally rectangular shape along a vertical direction orthogonal to the insertion direction of the third strap. The adjustable retaining device includes a third strap folding member, which has a third folding portion and a third gripping portion. The third folding portion is formed so that it can wrap the third strap around the rear end in the second opening and fold back forward. The third gripping portion is formed on the front end side of the third folding portion and is formed so that it can be inserted into the third strap together with the folded-back third strap. The third belt folding member is formed to move forward and backward within the second fastener and is generally plate-shaped. On the upper and lower inner wall surfaces of the third belt insertion part, between the left and right side walls of the second fastener, a third vertical wall portion is formed in a generally continuous manner along the belt width direction, which is stepped inward on the side of the second opening. A third protrusion is formed on at least one of the upper and lower end surfaces of the third folding part. The third protrusion moves to a position close to the front of the third vertical wall portion in the forward position of the third belt folding member, causing the third belt to bend in a generally stepped manner between the third protrusion and the third vertical wall portion. In the backward position of the third belt folding member, it moves into the second opening and releases the bending of the third belt.

[0025] The adjustable retaining device provided by the present invention preferably comprises multiple third protrusions formed at different positions on the upper and lower end faces of the third fold-back portion in the belt width direction; a fifth protrusion protruding inward at a position opposite to the third protrusions formed on the third vertical wall portion formed on the upper inner wall portion of the third belt insertion portion; a sixth protrusion protruding inward at a position opposite to the third protrusions formed on the third vertical wall portion formed on the lower inner wall portion of the third belt insertion portion; and a third protrusion protruding inward at a position opposite to the third protrusions formed on the lower end face of the third fold-back portion. The third belt fold-back member is configured to move forward and backward in the second fastener in a reversed state.

[0026] The effects of the invention

[0027] According to the present invention, a belt adjustment and holding device can be provided that has a thickness that is not too large, allows for easy adjustment and maintenance of the belt length, and eliminates the need for readjustment with each use. Attached Figure Description

[0028] Figure 1This is a perspective view of the exploded state of the adjusting and holding device in the first embodiment of this invention;

[0029] Figure 2 for Figure 1 A top view showing the assembly state (locked state) with the adjustment and holding device shown;

[0030] Figure 3 for Figure 2 View A shown;

[0031] Figure 4 for Figure 3 The BB cross-section diagram shown;

[0032] Figure 5 for Figure 1 A top view of the main body of the device with the adjustable holding mechanism shown;

[0033] Figure 6 for Figure 5 The DD cross-sectional view shown;

[0034] Figure 7 for Figure 5 The CC cross-section diagram shown;

[0035] Figure 8 for Figure 1 A top view of the fold-back member in the adjustable retaining device shown;

[0036] Figure 9 for Figure 8 The front view showing the folded-back component is shown.

[0037] Figure 10A for Figure 1 The perspective view shown is of the main body of the device with the adjustment and holding device and the folding member, viewed from the upper rear of the device.

[0038] Figure 10B for Figure 1 The perspective view shown is of the main body of the device with the adjustment and holding device and the folding member, viewed from the lower rear of the device.

[0039] Figure 11A for Figure 2 The EE cross-sectional view shown;

[0040] Figure 11B for Figure 2 The FF cross-sectional view shown;

[0041] Figure 11C for Figure 2 The GG cross-sectional diagram shown;

[0042] Figure 12 for Figure 2 The HH cross-sectional diagram shown;

[0043] Figure 13A for Figure 1 The perspective view shown is of the main body of the device and the folding member in the adjustable holding device with the folding member reversed vertically. It is a perspective view viewed from the upper rear of the device.

[0044] Figure 13B for Figure 1 The perspective view shown is of the main body of the device and the folding member in the case of the adjusting and holding device being inverted vertically. It is a perspective view viewed from the lower rear of the device.

[0045] Figure 14A for Figure 2 The diagram shows the cross-sectional view of the EE section when the belt fold-back member is rotated up and down in the case of the adjustable retaining device.

[0046] Figure 14B for Figure 2 The FF cross-sectional view shown is taken when the belt fold-back member is rotated up and down in the case of the adjustable retaining device.

[0047] Figure 14C for Figure 2 The diagram shows a cross-sectional view of the GG section with the adjustable retaining device, where the belt fold-back component is rotated up and down.

[0048] Figure 15 for Figure 2 The HH cross-sectional view shown is taken when the belt fold-back member is rotated up and down in the case of the adjustable retaining device.

[0049] Figure 16 This is a top view of the assembly state (locked state) of the adjusting and retaining device in the second embodiment of this invention;

[0050] Figure 17 for Figure 16 The cross-sectional view of JJ shown;

[0051] Figure 18 This is a top view of the assembly state (locked state) of the adjusting and retaining device in the third embodiment of this invention;

[0052] Figure 19 for Figure 18 The KK cross-sectional diagram shown;

[0053] Figure 20A for Figure 18 The perspective view of the device body and the second folding member in the adjustment and holding device of the third embodiment shown is a perspective view viewed from the oblique front upper part of the device;

[0054] Figure 20B for Figure 18 The perspective view of the device body and the second folding member in the adjustment and holding device of the third embodiment shown is a perspective view viewed from the oblique front and lower part of the device.

[0055] Figure 21 This is a top view of the assembly state (locked state) of the adjusting and retaining device in the fourth embodiment of this invention;

[0056] Figure 22 for Figure 21 The L-direction view shown;

[0057] Figure 23 for Figure 22 The MM cross-sectional diagram shown;

[0058] Figure 24A for Figure 21 The perspective view of the main body of the snap fastener and the third folding member in the adjustable retaining device of the fourth embodiment shown is a perspective view viewed from the oblique front upper part of the device;

[0059] Figure 24B for Figure 21 The perspective view of the main body of the snap fastener and the third folding member in the adjustable retaining device of the fourth embodiment shown is a perspective view viewed from the oblique front and lower part of the device;

[0060] Figure 25 This is a longitudinal cross-sectional view of the buckle described in Patent Document 1;

[0061] Figure 26 This is a longitudinal cross-sectional view of the buckle described in Patent Document 2. Detailed Implementation

[0062] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0063] First, the configuration and operation method of the adjusting and holding device of the first embodiment of this invention will be described in detail. Then, the second to fourth embodiments of this invention will be described, focusing on the differences from the first embodiment.

[0064] <Adjustable Holding Device of the First Embodiment>

[0065] First, use Figures 1 to 15 The adjustment and holding device of the first embodiment of this invention will be described. Figure 1 A perspective view showing the disassembled state of the first embodiment of this practice with an adjustment and holding device. Figure 2 exhibit Figure 1 A top view showing the assembly state (locked state) with the adjustment and holding device. Figure 3 exhibit Figure 2 The view shown is directed to direction A. Figure 4 exhibit Figure 3 The BB cross-section diagram is shown. Figure 5 exhibit Figure 1 The diagram shows a top view of the main body of the device with the adjustable holding mechanism. Figure 6 exhibit Figure 5 The DD cross-sectional view shown. Figure 7 exhibit Figure 5 The CC cross-section diagram shown. Figure 8 exhibit Figure 1 A top view of the fold-back member in the adjustable retaining device shown. Figure 9 exhibit Figure 8 The front view of the folded-back component is shown in Figure 10. Figure 1 The diagram shows a perspective view of the main body of the device with the adjustment and holding mechanism and the folding-back component. Figure 10A exhibit Figure 1 The diagram shows a perspective view of the main body of the device with the adjustment and holding mechanism and the folding member, and is a perspective view viewed from the upper rear of the device. Figure 10B exhibit Figure 1 The diagram shows a perspective view of the main body of the device with the adjustment and holding mechanism and the folding member, and is a perspective view viewed from the lower rear of the device. Figure 11A exhibit Figure 2 The EE cross-sectional view shown. Figure 11B exhibit Figure 2 The FF cross-sectional view is shown. Figure 11C exhibit Figure 2 The GG cross-sectional diagram shown. Figure 12 exhibit Figure 2 The HH cross-sectional diagram is shown. Figure 13A exhibit Figure 1 The diagram shows a perspective view of the main body of the device and the folding member in the case of the adjusting and holding device being inverted vertically, and is a perspective view viewed from the upper rear of the device. Figure 13B exhibit Figure 1 The diagram shows a perspective view of the main body of the device and the folding member in the case of the adjusting and holding device being inverted vertically, and is a perspective view viewed from the lower rear of the device. Figure 14A exhibit Figure 2 The diagram shows the EE cross-section when the belt folding member is rotated up and down in the case of the adjusting and holding device. Figure 14B exhibit Figure 2 The diagram shows a cross-sectional view of the FF section with the adjustable retaining device in which the belt fold-back member is inverted vertically. Figure 14C exhibit Figure 2 The diagram shows a cross-sectional view of the GG section with the adjustable retaining device in which the belt fold-back member is inverted vertically. Figure 15 exhibit Figure 2 The diagram shows the HH cross-section of the belt folding member in the adjustable retaining device when it is rotated up and down.

[0066] (The configuration of this belt's adjustment and holding device)

[0067] like Figures 1 to 15 As shown, the belt adjustment and holding device 10 of the first embodiment of this invention is a belt adjustment and holding device 10 formed to adjust the length of at least one belt 1 and hold the adjusted belt 1. It includes a device body 2 and a generally plate-shaped belt folding member 3 formed to move back and forth in a front-rear direction R1 within the device body 2. Furthermore, the device body 2 and the belt folding member 3 can be formed by injection molding of thermoplastic resin. In addition, the belt 1 can be made of various materials such as resin, synthetic fibers, leather, or natural fibers.

[0068] Here, the device body 2 has a strap insertion portion 21 and an opening portion 22. The strap insertion portion 21 is formed in a generally rectangular shape at the rear end 211 so that the strap 1 can be inserted forward. The opening portion 22 communicates with the strap insertion portion 21 and is formed in a roughly rectangular shape along a vertical direction R2 orthogonal to the insertion direction of the strap 1. Here, the opening portion 22 is formed from the upper end to the lower end of the device body 2, but it can also be partially or entirely blocked at either the upper or lower end. In addition, the strap folding member 3 has a folding portion 31 and a gripping portion 32. The folding portion 31 is formed so that the strap 1 can be wrapped around the front end 311 in the opening portion 22 of the device body 2 and folded back backward. The gripping portion 32 is formed on the rear end side of the folding portion 31 and is formed so that it can protrude backward from the strap insertion portion 21 together with the folded strap 1.

[0069] Furthermore, on the upper inner wall surface 212 and lower inner wall surface 213 of the insertion portion 21, vertical wall portions 212T and 213T are formed in a substantially continuous manner along the width direction R3 between the left and right side wall portions 23, rising in a stepped manner towards the inward side of the opening portion 22. Here, the vertical wall portion 212T rising on the upper inner wall surface 212 and the vertical wall portion 213T rising on the lower inner wall surface 213 are respectively erected vertically at approximately the same height, and their widths in the front-to-back direction are also formed to be approximately the same. In addition, the two vertical wall portions 212T and 213T are formed to have a width in the front-to-back direction that is approximately the same as that of the upper inner wall surface 212 and the lower inner wall surface 213. Furthermore, the lower end face of the vertical wall portion 212T is formed to be approximately parallel to the upper inner wall surface 212, and the upper end face of the vertical wall portion 213T is formed to be approximately parallel to the lower inner wall surface 213. Therefore, the vertical wall portions 212T and 213T are formed to rise inward in a stepped manner relative to the upper inner wall surface 212 and the lower inner wall surface 213, respectively. Here, the vertical wall portions 212T and 213T are formed continuously along the width direction R3, but they can also be partially separated, as long as they are formed to be generally continuous.

[0070] Furthermore, a protrusion 33 is formed on at least one of the upper end face 312 and the lower end face 313 of the fold-back portion 31. The protrusion 33 moves to a position near the rear of the upright wall portions 212T and 213T in the retracted position P1 of the fold-back member 3, causing the strap 1 to bend in a generally stepped shape between the protrusion 33 and the upright wall portions 212T and 213T. In the forward position P2 of the fold-back member 3, it moves into the opening 22, thus releasing the bending of the strap 1. Here, multiple protrusions 33 are formed with a predetermined width on both the upper end face 312 and the lower end face 313 of the fold-back portion 31, but they may also be formed on only either the upper end face 312 or the lower end face 313. Furthermore, the front end of the protrusion 33 is formed to be the highest, while the rear end gradually decreases in height.

[0071] Since the belt adjustment and holding device 10 of this first embodiment is configured as described above, when fixing the belt 1 to the device body 2, the belt folding member 3 moves together with the folded-back belt 1 to the rearward position P1. This allows the belt 1 to bend in a generally stepped shape between the upright portions 212T, 213T and the protrusion 33, thereby preventing movement of the belt 1 by means of its deformation resistance. Furthermore, the belt folding member 3 cannot move rearward relative to the device body 2 from the rearward position P1, so even if the belt 1 is pulled forcefully, no movement of the belt 1 relative to the device body 2 will occur. Therefore, by simply moving the belt folding member 3 together with the folded-back belt 1 to the rearward position P1, the belt 1 can be easily fixed to the device body 2.

[0072] Furthermore, when adjusting the length of the strap 1 relative to the main body 2, it is only necessary to move the strap folding member 3 together with the folded-back strap 1 towards the forward position P2. That is, by moving the strap folding member 3 towards the forward position P2, the protrusion 33 of the folded-back portion 31 can be moved into the opening 22. Therefore, the strap 1 wrapped around the folded-back portion 31 on the strap folding member 3, which has moved to the forward position P2, is released from the restraint imposed by the protrusion 33 and the vertical wall portions 212T and 213T, and can thus move freely within the opening 22. Therefore, the length of the strap 1 can be easily adjusted relative to the main body 2 simply by moving the strap folding member 3 together with the folded-back strap 1 towards the forward position P2.

[0073] Furthermore, when the belt folding member 3 and the folded belt 1 are moved together to the retracted position P1, the belt 1 is bent in a roughly stepped shape between the upright portions 212T and 213T and the protrusion 33. Therefore, to move the belt folding member 3 from the retracted position P1 to the forward position P2, a force is required for the protrusion 33 and the bent belt 1 to pass over the upright portions 212T and 213T. Thus, the belt folding member 3 is locked in the retracted position P1 by the bent belt 1. Therefore, even when the belt 1 is not in use, there is no displacement of the belt 1 relative to the device body 2, so the belt adjustment and holding device 10 does not need to be readjusted every time the belt 1 is used.

[0074] Furthermore, since it includes a device body 2 and a belt folding member 3, the device body 2 has a belt insertion portion 21 and an opening portion 22. The belt insertion portion 21 is formed in a generally rectangular shape at the rear end 211 so that the belt 1 can be inserted forward. The opening portion 22 communicates with the belt insertion portion 21 and is formed in a roughly rectangular shape along a vertical direction R2 orthogonal to the insertion direction of the belt 1. The belt folding member 3 has a folding portion 31 and a gripping portion 32. The folding portion 31 is formed so that it can reach forward in the opening portion 22. The part 311 wraps around the tape 1 and folds back. The gripping part 32 is formed on the rear end side of the folded part 31 and is configured to protrude from the tape insertion part 21 back together with the folded tape 1. The tape folding member 3 is configured to move in and out in the front-back direction R1 within the device body 2 and is roughly plate-shaped. Therefore, the thickness d1 of the vertical direction R2 of the folded part 31 of the tape folding member 3 is formed to be the minimum thickness required to fold back the tape 1. Thus, it is easy to avoid the thickness d2 of the device being too large.

[0075] Therefore, according to the first embodiment of the belt adjustment and holding device 10, a belt adjustment and holding device 10 can be provided that has a thickness that is not too large, can easily adjust and hold the length of the belt 1, and does not require readjustment every time it is used.

[0076] Furthermore, in the adjustable holding device 10 of this first embodiment, such as Figure 9 As shown, the upper end face 312 and the lower end face 313 of the preferred fold-back portion 31 are formed parallel to each other, and the protrusion portion 33 has a front wall surface 331 that is vertically erected relative to the upper end face 312 or the lower end face 313 and a rear inclined surface 332 that is obliquely inclined at an acute angle relative to the upper end face 312 or the lower end face 313.

[0077] In this case, when the belt folding member 3 moves from the forward position P2 to the backward position P1, the rearward inclined surface 332 of the protrusion 33 presses against the upright wall portions 212T and 213T, causing the upper inner wall surface 212 and lower inner wall surface 213 of the belt insertion portion 21 to bend elastically, thereby easily widening the gap between them. Therefore, the force required to move the belt folding member 3 from the forward position P2 to the backward position P1 can be reduced, thereby fixing the belt 1 to the device body 2 with less operating force. Furthermore, the gap between the upper end surface 312 or the lower end surface 313 of the folding portion 31 and the upright wall portions 212T and 213T is preferably formed to be the same as the wall thickness of the belt 1 or slightly larger than the wall thickness of the belt 1. In this case, when the folding member 3 and the folded-back strip 1 move together toward the backward position P1 or the forward position P2, the friction between the strip 1, which abuts against the upper end face 312 or the lower end face 313 of the folding-back part 31, and the vertical wall parts 212T and 213T can be reduced, thereby further improving operability.

[0078] On the other hand, the protrusion 33 has a front wall surface 331 that stands vertically forward relative to the upper end surface 312 or the lower end surface 313 of the fold-back portion 31. Therefore, when the fold-back member 3 and the folded-back belt 1 are moved together to the retracted position P1, bending the belt 1 at an angle closer to a right angle between the upright wall portions 212T, 213T and the front wall surface 331 of the protrusion 33 increases its deformation resistance. Therefore, when the fold-back member 3 is moved to the retracted position P1, the belt 1 can be more firmly fixed to the device body 2 in a controlled manner.

[0079] In addition, such as Figure 2 , Figures 10A to 15 As shown, in the belt adjustment and holding device 10 of this first embodiment, it is preferable that multiple protrusions 33 are formed at different positions on the upper end surface 312 and lower end surface 313 of the fold-back portion 31 in the belt width direction R3. A first protrusion 212T1 is formed on the vertical wall portion 212T formed on the upper inner wall surface 212 of the belt insertion portion 21, which protrudes inward at a position opposite to the protrusions 33 formed on the upper end surface 312 of the fold-back portion 31. A second protrusion 213T1 is formed on the vertical wall portion 213T formed on the lower inner wall surface 213 of the belt insertion portion 21, which protrudes inward at a position opposite to the protrusions 33 formed on the lower end surface 313 of the fold-back portion 31. The belt fold-back member 3 is configured to move forward and backward in the device body 2 in the front-back direction R1 in a state of upside down inversion.

[0080] Here, multiple protrusions 33 are formed with a predetermined width and arranged in a series along the belt width direction R3, with a gap of more than the predetermined width between them. Furthermore, multiple (e.g., four) protrusions 33 are formed on the upper end face 312 of the folded-back portion 31, and multiple (e.g., two) protrusions 33 are formed on the lower end face 313 of the folded-back portion 31. Additionally, on the vertical wall portion 212T formed on the upper inner wall surface 212 in the belt insertion portion 21, a first protrusion 212T1 is formed wide, facing the two protrusions 33 near the center portion, and a first protrusion 212T1 is formed with approximately the same width as the protrusions 33, facing one protrusion 33 near each of the two ends. Furthermore, on the vertical wall portion 213T formed on the lower inner wall surface 213 in the insertion portion 21, two second protrusions 213T1 are formed with approximately the same width as the protrusions 33, facing each other to the two protrusions 33 formed on the lower end surface 313 of the folded-back portion 31.

[0081] In this situation, with the non-vertically reversible folding member 3 and the folded-back strip 1 moved together to the backward position P1, as shown in Figure 11, Figure 12 As shown, at the position where the first protrusion 212T1 faces the protrusion 33, the gap between the first protrusion 212T1 and the upper end face 312 of the folded-back portion 31 is reduced to the extent that the height of the first protrusion 212T1 is reduced. Similarly, at the position where the second protrusion 213T1 faces the protrusion 33, the gap between the second protrusion 213T1 and the lower end face 313 of the folded-back portion 31 is reduced to the extent that the height of the second protrusion 213T1 is reduced. Therefore, even for a strap 1 with a relatively thin wall thickness compared to the gap between the upright portions 212T, 213T and the folded-back portion 31, the strap 1 can be bent in a generally stepped shape between the protrusion 33 of the folded-back portion 31 and the first protrusion 212T1 and the second protrusion 213T1 of the strap insertion portion 21. Thus, even a relatively thin-walled strap 1 can be securely fixed to the device body 2.

[0082] On the other hand, such as Figures 13A to 15As shown, when the belt folding member 3 is inverted vertically relative to the device body 2, the protrusion 33 of the folding portion 31 is positioned at different locations in the belt width direction R3 relative to the first protrusion 212T1 and the second protrusion 213T1 of the belt insertion portion 21. Therefore, when the belt folding member 3, after being inverted vertically, is moved together with the folded belt 1 to the retracted position P1, the belt 1 can be bent in a roughly stepped shape between the upright portions 212T, 213T and the protrusion 33 without being affected by the first protrusion 212T1 and the second protrusion 213T1, thereby preventing the movement of the belt 1 by means of its deformation resistance. Therefore, when the belt folding member 3, after being inverted vertically, is moved to the retracted position P1, compared to the case where the belt folding member 3 is not inverted vertically, the thicker belt 1 can be firmly fixed to the device body 2. As a result, in a device with adjustment and holding mechanism 10, the lengths of multiple belts 1 with different wall thicknesses can be adjusted and maintained by simply inverting the belt folding member 3 and installing it onto the device body 2.

[0083] In addition, such as Figures 10A to 15 As shown, in the belt adjustment and holding device 10 of this first embodiment, a first inclined surface 212T2 inclined toward the upper inner wall surface 212 in the belt insertion portion 21 is preferably formed on the rear end side of the first protrusion 212T1, and a second inclined surface 213T2 inclined toward the lower inner wall surface 213 in the belt insertion portion 21 is formed on the rear end side of the second protrusion 213T1.

[0084] In this situation, for example, when the non-vertically reversible belt folding member 3 is moved from the retracted position P1 to the forward position P2, the belt 1, bent by the protrusion 33 formed on the upper end face 312 of the folding part 31, presses the first protrusion 212T1 upward via the first inclined surface 212T2, and the belt 1, bent by the protrusion 33 formed on the lower end face 313 of the folding part 31, presses the second protrusion 213T1 downward via the second inclined surface 213T2. This causes the upper inner wall surface 212 and the lower inner wall surface 213 of the belt insertion part 21 to bend elastically, thereby easily widening the gap between them. Therefore, the force required to move the belt folding member 3 from the retracted position P1 to the forward position P2 can be reduced, allowing the length of the belt 1 to be adjusted relative to the device body 2 with less operating force.

[0085] In addition, such as Figures 1 to 4 , Figure 8 , Figure 9As shown, in the belt adjustment and holding device 10 of this first embodiment, it is preferable that guide grooves 231 are formed on the left and right sidewall portions 23 of the device body 2 along the front-rear direction R1, so that the belt folding member 3 can move between the forward position P2 and the backward position P1. Guide protrusions 314 that engage with the guide grooves 231 are formed on the left and right outer ends of the folding portion 31. Furthermore, the folding portion 31 is formed by separating the left and right sides at the center of the belt width direction R3, and the separated left and right folding portions 31 are connected by the gripping portion 32 to form a generally U-shaped structure. Here, the rear end portion 321 of the gripping portion 32 is formed into a generally arc shape when viewed from above. In order to facilitate gripping, the plate thickness of the rear end portion 321 is thicker than that of the connecting portion of the folding portion 31, and it is formed into a generally arc-shaped cross section. Furthermore, in order to facilitate the engagement of the guide protrusions 314 of the separated left and right folded-back portions 31 with the guide groove 231, a generally elliptical notch 322 and a circular hollow portion 323 are formed on the gripping portion 32. In addition, the guide groove 231 is formed with a tapered cross-section whose groove width expands inward toward the opening portion 22.

[0086] In this case, the left and right separated fold-back portions 31 can be displaced vertically while their central portions overlap, causing the guide protrusions 314 formed on the fold-back portions 31 to engage with the guide grooves 231 formed on the side wall portion 23 of the device body 2. Therefore, the belt fold-back member 3 can be easily installed into the device body 2. Furthermore, by moving the guide protrusions 314 to the front end of the guide groove 231, the belt fold-back member 3 can be moved to the forward position P2, thereby easily adjusting the length of the belt 1. Furthermore, by moving the guide protrusions 314 to the rear end of the guide groove 231, the belt fold-back member 3 can be moved to the retracted position P1, thereby easily fixing the belt 1 to the device body 2. Therefore, the belt fold-back member 3 can be easily installed into the device body 2, and the length of the belt 1 can be adjusted more easily, and the adjusted belt 1 can be fixed to the device body 2.

[0087] Furthermore, such as Figure 4 , Figure 8 As shown, preferably, a pair of abutment seats 315 facing each other with a predetermined gap d4 are formed on the central side of the separated left and right folded-back portions 31. When the guide protrusion 314 is engaged in the guide groove 231, the guide protrusion 314 is pressed from the left and right by the guide groove 231, causing the gripping portion 32 to bend elastically. As a result, the gap d4 of the abutment seats 315 is reduced to a gap d5 smaller than the gap d4 before engagement. Furthermore, the gap d5 is formed to be smaller than the protrusion amount d3 of the guide protrusion 314 relative to the left and right outer ends of the folded-back portion 31.

[0088] In this case, the guide protrusion 314 of the fold-back portion 31 is designed to be difficult to disengage from the guide groove 231 by means of the elastic force of the gripping portion 32. Moreover, even if the strap 1 is pulled forcefully, the left and right abutment seats 315 will abut against each other and support it, so the guide protrusion 314 can maintain its engaged state within the guide groove 231. Therefore, when the strap fold-back member 3 is moved to the retracted position P1 and the strap 1 is fixed to the device body 2, the strap fold-back member 3 can be prevented from falling off the device body 2, thereby reliably fixing the strap 1 to the device body 2.

[0089] Furthermore, the guide groove 231 can also be formed in a manner that extends from the inside of the opening 22 to the outside of the sidewall 23, parallel to the width direction R3. In this case, the engagement state between the guide protrusion 314 and the guide groove 231 can be maintained by having the base end of the guide protrusion 314 of the folded-back portion 31 abut against the inner periphery of the guide groove 231.

[0090] In addition, such as Figures 1 to 6 As shown, in the belt adjustment and holding device 10 of this first embodiment, a fastener 4 is preferably provided. The fastener 4 has a length-fixing strap 1K fixed on the base end 41 side and a locking claw 421 formed on the top end 42 side. A fastener storage part 24 and a locking protrusion 241 are formed on the front end side of the opening 22 on the device body 2. The fastener storage part 24 stores the fastener 4 in a detachable manner. The locking protrusion 241 is located in the fastener storage part 24 and engages with the locking claw 421 of the fastener 4.

[0091] Here, a hollow portion 411 is formed between the base end 41 and the top end 42 of the fastener 4. A length-fixing strap 1K is inserted through the hollow portion 411 and wrapped around the base end 41 for fixation. Furthermore, an insertion foot 422 and an operating portion 423 are formed on the top end 42 of the fastener 4. The insertion foot 422 is located on the central side and is separated to the left and right, while the operating portion 423 is located on the left and right outer sides of the insertion foot 422 and has a locking claw 421. In addition, a guide rib 243 that guides the insertion foot 422 in the front-back direction R1 and an engaging protrusion 241 that engages with the locking claw 421 of the fastener 4 are formed in the storage chamber 242 of the fastener storage portion 24. The engaging protrusion 241 is formed separately on the upper inner wall and the lower inner wall of the storage chamber 242. The operating part 423 of the fastener 4 is configured such that when the top part 42 of the fastener 4 is stored in the storage chamber 242, it is pushed and displaced by the upper and lower separating engagement protrusions 241 while passing between the engagement protrusions 241. When storage is completed, the engagement claw 421 engages with the engagement protrusions 241. Furthermore, by pressing the left and right operating parts 423 inward, the engagement between the engagement claw 421 and the engagement protrusions 241 can be released.

[0092] In this configuration, the length-adjusting strap 1 can be fixed at the rear end of the device body 2 via the fold-back member 3 in an adjustable manner, while the length-fixing strap 1K can be detachably connected to the fastener storage portion 24 formed at the front end of the device body 2 via the fastener 4. Therefore, the fold-back member 3 and the fastener 4 can be arranged adjacent to each other in the longitudinal direction R1 of the device body 2, and the fold-back member 3 and the fastener 4 will not overlap in the vertical direction R2. As a result, the device can be made thinner, improving its aesthetic appearance and usability and operability.

[0093] (The operating method of this belt with adjustment and holding device)

[0094] Next, the operation method of the belt adjustment and holding device 10 of the first embodiment will be briefly described. Specifically, the gripping portion 32 on the belt fold-back member 3 is inserted into the device body 2 through the opening 22, and protrudes towards the rear end 211 of the belt insertion portion 21 through the gap between the upper inner wall surface 212 and the lower inner wall surface 213 of the belt insertion portion 21. Furthermore, in the opening 22, the left and right separated fold-back portions 31 are displaced in the vertical direction so that their central portions overlap, and in this state, the guide protrusion 314 engages with the guide groove 231 formed on the side wall portion 23 of the device body 2. Afterward, the left and right separated fold-back portions 31 are returned to their original state. Thus, the belt fold-back member 3 can be installed into the device body 2 in a manner that allows it to move forward and backward in the front-back direction R1. Then, the belt fold-back member 3 is moved to the forward position P2 of the device body 2, and the length adjustment belt 1 is inserted from the belt insertion portion 21 along the gripping portion 32 into the opening 22. Furthermore, in the opening 22, the strap 1 is wrapped around the front end 311 of the fold-back portion 31 and folded back, and the folded-back strap 1 protrudes back from the strap insertion portion 21.

[0095] Next, when adjusting the length of the length-adjusting strap 1 relative to the main body 2, the gripping part 32 and the folded-back strap 1 are gripped together, and the strap folding member 3 is moved to the forward position P2 of the main body 2, so that the strap 1 leaves the folding part 31 and is in a relaxed state. The strap 1 is moved back and forth to adjust its length. Furthermore, when fixing the adjusted strap 1 to the main body 2, the gripping part 32 and the folded-back strap 1 are gripped together, and the strap folding member 3 is moved from the forward position P2 to the backward position P1, so that the strap 1 is bound by a roughly stepped bend between the protrusion 33 of the folding part 31 and the upright wall portions 212T and 213T of the strap insertion part 21. Here, the rear end 321 of the gripping part 32 is formed with a roughly arc-shaped cross section, so even when the gripping part 32 and the folded-back strap 1 are gripped together and pulled to make the strap 1 bend in a roughly stepped shape, pain in the fingers gripping the gripping part 32 can be reduced.

[0096] Furthermore, at the retracted position P1 of the device body 2, the guide protrusion 314 abuts against the rear end of the guide groove 231, thereby preventing the belt folding member 3 from disengaging from the belt insertion portion 21. Furthermore, when the belt folding member 3 is moved to the retracted position P1 of the device body 2, the belt folding member 3 is locked in the retracted position P1 by the bent belt 1. Therefore, even if some external force in the front-back direction is applied to the belt folding member 3, the belt 1 can be kept fixed.

[0097] <Second Embodiment with Adjustable Holding Device>

[0098] Next, use Figure 16 , Figure 17 The second embodiment of this invention will now be described with an adjustable holding device. Figure 16 A top view showing the assembly state (locked state) of the adjusting and retaining device in the second embodiment of this invention. Figure 17 exhibit Figure 16 The cross-sectional view of JJ is shown.

[0099] like Figure 16 , Figure 17As shown, the second embodiment of the belt adjustment and holding device 10B is a belt adjustment and holding device 10B configured to adjust the length of at least one belt 1 and hold the adjusted belt 1. The belt adjustment and holding device 10B includes: a device body 2B having a belt insertion portion 21 and an opening portion 22. The belt insertion portion 21 is formed in a generally rectangular shape at a rear end 211 so that the belt 1 can be inserted forward. The opening portion 22 communicates with the belt insertion portion 21 and is formed in a generally rectangular shape along a vertical direction R2 orthogonal to the insertion direction of the belt 1; and a belt folding member 3 having a folding portion 31 and a gripping portion 32. The folding portion 31 is configured to wrap the belt 1 around the front end 311 in the opening portion 22 and fold back backward. The gripping portion 32 is formed at the rear end side of the folding portion 31 and is configured to be inserted from the belt along with the folded belt 1. The section 21 protrudes rearward, and the folding member 3 is formed to move forward and backward in the front-back direction R1 within the main body 2B of the device, and is generally plate-shaped. On the upper inner wall surface 212 and lower inner wall surface 213 of the insertion section 21, between the left and right side wall sections 23, vertical wall sections 212T and 213T are formed in a generally continuous manner along the width direction R3 of the belt. The vertical wall sections 212T and 213T are stepped inward on the side of the opening 22. A protrusion 33 is formed on at least one of the upper end surface 312 and lower end surface 313 of the folding section 31. The protrusion 33 moves to a position near the rear of the vertical wall sections 212T and 213T in the retracted position P1 of the folding member 3, causing the belt 1 to bend in a generally stepped manner between the protrusion 33 and the vertical wall sections 212T and 213T. In the forward position P2 of the folding member 3, the belt 1 moves into the opening 22 and the bending of the belt 1 is released. The above content is the same as the first embodiment described above. Here, the description of common symbols that are similar to those in the first embodiment will be omitted in principle, and the description will focus on the differences from the first embodiment.

[0100] That is, in the belt adjustment and holding device 10B of the second embodiment, a belt fixing frame 25 is formed on the front end side of the opening 22 on the device body 2B, and a length-fixing belt 1K is fixed to the belt fixing frame 25. Here, the belt fixing frame 25 is formed in a straight line along the belt width direction R3 at a position adjacent to the belt folding member 3 that has moved to the forward position P2, and is connected to the top end of the side wall portion 23. The belt fixing frame 25 is formed with a generally rectangular cross section, and the length-fixing belt 1K is wound and fixed around the outer periphery of the belt fixing frame 25.

[0101] Because the belt adjustment and holding device 10B of this second embodiment is formed with the above-described structure, the length adjustment belt 1 can be fixed in an adjustable manner at the rear end of the device body 2B via the belt folding member 3, and the length fixing belt 1K can be fixed at the front end of the device body 2B via the belt fixing frame 25. Therefore, the device body 2B connecting the two belts 1 and 1K can be miniaturized and made thinner, thereby improving usability and operability during use. Therefore, a belt adjustment and holding device 10B that does not have an excessively large device thickness and can easily adjust and hold the length of the belt 1 can be provided.

[0102] <Third Embodiment with Adjustable Holding Device>

[0103] Next, use Figures 18 to 2 0. The adjustment and holding device of the third embodiment of this implementation will be described. Figure 18 A top view showing the assembly state (locked state) of the adjusting and retaining device in the third embodiment of this invention. Figure 19 exhibit Figure 18 The KK cross-sectional diagram is shown. Figure 20A exhibit Figure 18 The third embodiment shown is a perspective view of the device body and the second folding member in the adjustable holding device, and is a perspective view viewed from the oblique front upper part of the device. Figure 20B exhibit Figure 18 The third embodiment shown is a perspective view of the device body and the second folding member in the adjustable holding device, and is a perspective view viewed from the oblique front and lower part of the device.

[0104] like Figures 18 to 20B As shown, the belt adjustment and holding device 10C of the third embodiment is a belt adjustment and holding device 10C formed to adjust the length of at least one belt 1 and hold the adjusted belt 1. The belt adjustment and holding device 10C includes: a device body 2C, which has a belt insertion portion 21 and an opening portion 22. The belt insertion portion 21 is generally rectangular in shape so that the belt 1 can be inserted forward.

[0105] An opening 22 is formed at the rear end 211, communicating with the belt insertion portion 21, and is formed in a roughly rectangular shape along a vertical direction R2 orthogonal to the insertion direction of the belt 1; and a belt folding member 3, which has a folding portion 31 and a gripping portion 32. The folding portion 31 is configured to wrap the belt 1 around the front end 311 in the opening 22 and fold back backward. The gripping portion 32 is formed on the rear end side of the folding portion 31 and is configured to protrude backward from the belt insertion portion 21 together with the folded belt 1. The belt folding member 3 is configured to move forward and backward in a front-back direction R1 within the device body 2C; and is roughly plate-shaped; the upper inner wall surface 212 and the lower inner wall surface 212 of the belt insertion portion 21 are also present. 13. Vertical wall portions 212T and 213T are formed in a generally continuous manner along the width direction R3 between the left and right side wall portions 23, rising in a stepped manner towards the inward side of the opening 22. A protrusion 33 is formed on at least one of the upper end face 312 and the lower end face 313 of the fold-back portion 31. The protrusion 33 moves to a position near the rear of the vertical wall portions 212T and 213T at the retracted position P1 of the fold-back member 3, causing the belt 1 to bend in a generally stepped manner between the protrusion 33 and the vertical wall portions 212T and 213T. At the forward position P2 of the fold-back member 3, it moves into the opening 22, releasing the bending of the belt 1. The above content is similar to the first embodiment described above. Here, common symbols used in the designations similar to those in the first embodiment are generally omitted from the description, and the explanation focuses on the differences from the first embodiment.

[0106] That is, in the belt adjustment and holding device 10C of the third embodiment, a second belt insertion portion 21C, which is generally rectangular, is provided at the front end of the opening 22 on the device body 2C so that a second belt 1L for length adjustment can be inserted rearward. In addition, a second belt folding member 3C is provided, which has a second folding portion 31C and a second gripping portion 32C. The second folding portion 31C is formed so that it can wrap the second belt 1L around the rear end 311C in the opening 22 and fold back forward. The second gripping portion 32C is formed at the front end of the second folding portion 31C and is formed so that it can protrude forward from the second belt insertion portion 21C together with the folded second belt 1L. The second belt folding member 3C is formed so that it can move forward and backward in the front-back direction R1 within the device body 2C and is generally plate-shaped.

[0107] Furthermore, a guide protrusion 314C with approximately the same shape as the guide protrusion 314 of the second fold-back member 3 is formed on the second fold-back member 3C, and engages with the guide groove 231. In this case, the guide groove 231 can be shared between the fold-back member 3 and the second fold-back member 3C, so the full length of the guide groove 231 can be formed in a shorter length, which helps to miniaturize the device.

[0108] Furthermore, similar to the fold-back portion 31, the second fold-back portion 31C is formed by separating left and right sides at the center of the belt width direction R3, and the separated left and right fold-back portions 31C are connected by the gripping portion 32C to form a roughly U-shape. Moreover, a pair of abutment seats 315C facing each other with a predetermined gap are formed on the central side of the separated left and right fold-back portions 31C. Therefore, when the second belt fold-back member 3C is moved to the forward position and the belt 1L is fixed to the device body 2C, even if the belt 1L is pulled forcefully, the abutment seats 315C will abut against each other and support, so the guide protrusion 314C can remain engaged in the guide groove 231. Therefore, the second belt fold-back member 3C can be prevented from falling off the device body 2C, thereby reliably fixing the belt 1L to the device body 2C.

[0109] Furthermore, on the upper inner wall surface 212C and lower inner wall surface 213C of the second belt insertion portion 21C, second vertical wall portions 212CT and 213CT are formed in a generally continuous manner along the belt width direction R3 between the left and right side wall portions 23, rising in a stepped manner towards the inward side of the opening portion 22. In addition, a second protrusion 33C is formed on at least one of the upper end surface 312C and lower end surface 313C of the second fold-back portion 31C. The second protrusion 33C moves to a position near the front of the second vertical wall portions 212CT and 213CT in the forward position of the second belt fold-back member 3C, causing the second belt 1L to bend in a generally stepped manner between the second protrusion 33C and the second vertical wall portions 212CT and 213CT. In the retracted position of the second belt fold-back member 3C, it moves into the opening portion 22, releasing the bending of the second belt 1L. Furthermore, the rear end side of the second protrusion 33C is formed to be the highest, while the front end side is formed in a gradually decreasing manner.

[0110] Because the belt adjustment and holding device 10C of this third embodiment is structured as described above, when fixing the second belt 1L to the device body 2C, the second belt folding member 3C moves together with the folded-back second belt 1L towards the forward position. This allows the second belt 1L to bend approximately in a stepped shape between the second vertical wall portions 212CT, 213CT and the second protrusion 33C, thereby preventing movement of the second belt 1L by means of its deformation resistance. Furthermore, the second belt folding member 3C cannot move forward relative to the device body 2C from the forward position, so even if the second belt 1L is pulled forcefully, it will not move relative to the device body 2C. Therefore, by simply moving the second belt folding member 3C together with the folded-back second belt 1L towards the forward position, the second belt 1L can be easily fixed to the device body 2C.

[0111] Furthermore, when adjusting the length of the second strap 1L relative to the device body 2C, it is only necessary to move the second strap folding member 3C and the folded-back second strap 1L together to a rearward position. That is, by moving the second strap folding member 3C to a rearward position, the second protrusion 33C can be moved into the opening 22. Therefore, the second strap 1L wrapped around the second folded-back portion 31C on the second strap folding member 3C, which has moved to the rearward position, is freed from the bending caused by the second protrusion 33C and the second vertical wall portions 212CT and 213CT, and can thus move freely within the opening 22. Therefore, the length of the second strap 1L can be easily adjusted relative to the device body 2C simply by moving the second strap folding member 3C and the folded-back second strap 1L together to a rearward position.

[0112] Furthermore, when the second belt folding member 3C is moved to the forward position together with the folded second belt 1L, the second belt 1L bends in a roughly stepped shape between the second vertical wall portions 212CT and 213CT and the second protrusion 33C. Therefore, to move the second belt folding member 3C from the forward position to the backward position, the second protrusion 33C and the bent second belt 1L need to pass over the second vertical wall portions 212CT and 213CT together. Thus, the second belt folding member 3C is locked in the forward position by the bent second belt 1L. Therefore, even when the second belt 1L is not in use, the second belt 1L will not shift relative to the device body 2C, so the belt adjustment and holding device 10C does not need to be readjusted every time the second belt 1L is used.

[0113] Furthermore, since the front end of the opening 22 on the main body 2C of the device has a generally rectangular second strap insertion portion 21C that allows for the rearward insertion of a second strap 1L for length adjustment, and the strap adjustment and holding device 10C has a second strap folding member 3C, the second strap folding member 3C has a second folding portion 31C and a second gripping portion 32C. The second folding portion 31C is configured to wrap around the second strap 1L in the opening 22 at the rear end 311C and fold back forward. The second gripping portion 32C is formed on the front end of the second folding portion 31C and is configured to protrude forward from the second strap insertion portion 21C together with the folded second strap 1L. The second strap folding member 3C is configured to move forward and backward in the front-back direction R1 within the main body 2C and is generally plate-shaped. Therefore, by making the thickness of the second folding portion 31C in the vertical direction R2 the minimum thickness required to fold back the second strap 1L, it is easy to avoid the device being too thick. Therefore, according to the belt adjustment and holding device 10C of the third embodiment described above, a belt adjustment and holding device 10C can be provided that has a thickness that is not too large, can easily adjust and hold the length of the belts 1 and 1L, and does not require readjustment for each use.

[0114] Furthermore, in the belt adjustment and holding device 10C of this third embodiment, it is preferable that multiple second protrusions 33C are formed at different positions on the upper end face 312C and lower end face 313C of the second fold-back portion 31C in the belt width direction R3. A third protrusion 212CT1 is formed on the second vertical wall portion 212CT formed on the upper inner wall surface 212C of the second belt insertion portion 21C, which protrudes inward at a position opposite to the second protrusions 33C formed on the upper end face 312C of the second fold-back portion 31C. A fourth protrusion 213CT1 is formed on the second vertical wall portion 213CT formed on the lower inner wall surface 213C of the second belt insertion portion 21C, which protrudes inward at a position opposite to the second protrusions 33C formed on the lower end face 313C of the second fold-back portion 31C. The second belt fold-back member 3C is configured to move forward and backward in the device body 2C in the front-back direction R1 in a state of upside down inversion.

[0115] In this case, with the second belt retraction member 3C (which does not rotate upside down) and the retracted second belt 1L moved to the forward position, the gap between the upper end face 312C of the third protrusion 212CT1 and the second protrusion 33C is reduced to the height of the third protrusion 212CT1 when the third protrusion 212CT1 faces the second protrusion 33C, and the gap between the lower end face 313C of the fourth protrusion 213CT1 and the second retraction 31C is reduced to the height of the fourth protrusion 213CT1 when the fourth protrusion 213CT1 faces the second protrusion 33C. Therefore, even for the belt 1L, which has a relatively thin wall thickness compared to the gap between the second vertical wall portions 212CT, 213CT and the second retraction portion 31C, the second belt 1L can be bent in a roughly stepped shape between the second protrusion 33C and each of the third protrusion 212CT1 and the fourth protrusion 213CT1. Therefore, even a thinner tape 1L can be firmly fixed to the main body 2C of the device.

[0116] On the other hand, when the second belt retraction member 3C is inverted vertically relative to the device body 2C, the second protrusion 33C is positioned differently in the belt width direction R3 relative to the third protrusion 212CT1 and the fourth protrusion 213CT1. Therefore, when the inverted second belt retraction member 3C moves to the forward position together with the retracted belt 1L, the second belt 1L can be bent in a roughly stepped shape between the second vertical wall portions 212CT, 213CT and the second protrusion 33C without being affected by the third protrusion 212CT1 and the fourth protrusion 213CT1, thereby using its deformation resistance to prevent the movement of the second belt 1L. Therefore, when the inverted second belt retraction member 3C moves to the forward position, compared with the case where the second belt retraction member 3C is not inverted, the thicker belt 1L can be firmly fixed to the device body 2C. As a result, in a device with adjustment and holding mechanism 10C, the lengths of multiple belts 1L with different wall thicknesses can be adjusted and maintained by the simple operation of inverting the second belt folding member 3C upside down and installing it onto the device body 2C.

[0117] Furthermore, in the belt adjustment and holding device 10C of this third embodiment, it is preferable that a third inclined surface 212CT2 is formed on the front end side of the third protrusion 212CT1, which is inclined forward and upward toward the upper inner wall surface 212C in the second belt insertion portion 21C, and a fourth inclined surface 213CT2 is formed on the front end side of the fourth protrusion 213CT1, which is inclined forward and downward toward the lower inner wall surface 213C in the second belt insertion portion 21C.

[0118] In this case, for example, when the second belt retraction member 3C (which does not rotate vertically) moves from the forward position to the backward position, the second belt 1L, bent by the second protrusion 33C formed on the upper end face 312C of the second retraction portion 31C, presses the third protrusion 212CT1 upward via the third inclined surface 212CT2, and the second belt 1L, bent by the second protrusion 33C formed on the lower end face 313C of the second retraction portion 31C, presses the fourth protrusion 213CT1 downward via the fourth inclined surface 213CT2. This causes the upper inner wall surface 212C and the lower inner wall surface 213C of the second belt insertion portion 21C to bend elastically, thereby easily widening the gap between them. Therefore, the force required to move the second belt retraction member 3C from the forward position to the backward position can be reduced, allowing the length of the second belt 1L to be adjusted relative to the device body 2C with less operating force.

[0119] <Fourth Embodiment with Adjustable Holding Device>

[0120] Next, use Figures 21 to 2 4. The adjustment and holding device of the fourth embodiment of this implementation will be described. Figure 21A top view showing the assembly state (locked state) of the adjusting and retaining device in the fourth embodiment of this invention. Figure 22 exhibit Figure 21 The L-direction view shown. Figure 23 exhibit Figure 22 The MM cross-sectional view is shown. Figure 24A exhibit Figure 21 The fourth embodiment shown is a perspective view of the main body of the fastener and the third folding member in the adjustable retaining device, and is a perspective view viewed from the oblique front and upper part of the device. Figure 24B exhibit Figure 21 The fourth embodiment shown is a perspective view of the main body of the fastener and the third folding member in the adjustable retaining device, and is a perspective view viewed from the oblique front and lower part of the device.

[0121] like Figures 21 to 24B As shown, the fourth embodiment of the belt adjustment and holding device 10D is a belt adjustment and holding device 10D formed to adjust the length of at least one belt 1 and hold the adjusted belt 1. The belt adjustment and holding device 10D includes: a device body 2D having a belt insertion portion 21 and an opening portion 22. The belt insertion portion 21 is formed in a generally rectangular shape at the rear end 211 so that the belt 1 can be inserted forward. The opening portion 22 communicates with the belt insertion portion 21 and is formed in a generally rectangular shape along a vertical direction R2 orthogonal to the insertion direction of the belt 1; and a belt folding member 3 having a folding portion 31 and a gripping portion 32. The folding portion 31 is formed to be able to wrap the belt 1 around the front end 311 in the opening portion 22 and fold back backward. The gripping portion 32 is formed at the rear end side of the folding portion 31 and is formed to be able to be inserted from the belt along with the folded belt 1. The section 21 protrudes rearward, and the folding member 3 is formed to move forward and backward in the front-back direction R1 within the main body 2D of the device, and is generally plate-shaped. On the upper inner wall surface 212 and lower inner wall surface 213 of the insertion section 21, between the left and right side wall sections 23, vertical wall sections 212T and 213T are formed in a generally continuous manner along the width direction R3 of the belt. The vertical wall sections 212T and 213T are stepped inward on the side of the opening 22. A protrusion 33 is formed on at least one of the upper end surface 312 and lower end surface 313 of the folding section 31. The protrusion 33 moves to a position near the rear of the vertical wall sections 212T and 213T at the retracted position P1 of the folding member 3, causing the belt 1 to bend in a generally stepped manner between the protrusion 33 and the vertical wall sections 212T and 213T. At the forward position P2 of the folding member 3, the belt 1 moves into the opening 22 and the bending of the belt 1 is released. The above content is the same as the first embodiment described above. Here, the description of common symbols that are similar to those in the first embodiment will be omitted in principle, and the description will focus on the differences from the first embodiment.

[0122] That is, in the adjustable retaining device 10D of the fourth embodiment, a second fastener 4D is provided. The second fastener 4D has a third strap 1M for length adjustment fixed on the base end 4K side in an adjustable manner, and a locking claw 421 is formed on the top end 42 side. A fastener storage part 24 and a locking protrusion 241 are formed on the front end side of the opening 22 on the device body 2D. The fastener storage part 24 stores the second fastener 4D in a detachable manner, and the locking protrusion 241 is located in the fastener storage part 24 and engages with the locking claw 421 of the second fastener 4D.

[0123] Here, similar to the first embodiment, an insertion foot 422 and an operating part 423 are formed at the top end 42 of the second fastener 4D. The insertion foot 422 is located on the central side and is separated to the left and right, while the operating part 423 is located on the left and right outer sides of the insertion foot 422 and has a locking claw 421. Furthermore, a guide rib 243 that guides the insertion foot 422 in the front-back direction R1 and a locking protrusion 241 that engages with the locking claw 421 of the second fastener 4D are formed in the storage chamber 242 of the fastener storage part 24. The locking protrusion 241 is formed separately on the upper inner wall and the lower inner wall of the storage chamber 242. The operating part 423 of the second fastener 4D is configured such that when the top part 42 of the second fastener 4D is stored in the storage chamber 242, it is pushed and displaced by the upper and lower separating engagement protrusions 241 while passing between the engagement protrusions 241. When storage is completed, the locking claw 421 engages with the engagement protrusions 241. Furthermore, by pressing the left and right operating parts 423 inward, the engagement between the locking claw 421 and the engagement protrusions 241 can be released.

[0124] In this configuration, the length-adjustable strap 1 can be fixed at the rear end of the device body 2D via the fold-back member 3 in an adjustable manner, while the length-adjustable third strap 1M can be connected to the fastener storage portion 24 formed at the front end of the device body 2D via the second fastener 4D in a length-adjustable and detachable manner. Therefore, the fold-back member 3 and the second fastener 4D can be arranged adjacent to each other in the longitudinal direction R1 of the device body 2D, and the fold-back member 3 and the second fastener 4D will not overlap in the vertical direction R2. As a result, the device can be made thinner, improving its aesthetic appearance and usability and operability.

[0125] Furthermore, in the belt adjustment and holding device 10D of this fourth embodiment, it is preferable that the base end 4K of the second fastener 4D has a third belt insertion portion 41D and a second opening portion 42D. The third belt insertion portion 41D is formed in a generally rectangular shape so that the third belt 1M can be inserted rearward from the front end 411D. The second opening portion 42D communicates with the third belt insertion portion 41D and is formed in a vertical direction R2 orthogonal to the insertion direction of the third belt 1M, and is also generally rectangular. The belt adjustment and holding device 10D includes a third belt folding member 3D. The third belt folding member 3D has a third folding portion 31D and a third gripping portion 32D. The third folding portion 31D is formed so that it can wrap the third belt 1M around the rear end 311D in the second opening portion 42D and fold back forward. The third gripping portion 32D is formed on the front end side of the third folding portion 31D and is formed so that it can protrude forward from the third belt insertion portion 41D together with the folded-back third belt 1M. The return member 3D is formed to move forward and backward in the front-back direction R1 within the second fastener 4D, and is generally plate-shaped. On the upper inner wall surface 412D and lower inner wall surface 413D of the third belt insertion portion 41D, and between the left and right side wall portions 43D on the second fastener 4D, a third vertical wall portion 412DT and 413DT are formed in a generally continuous manner along the belt width direction R3 between the left and right side wall portions 43D and the second opening portion 42D, rising in a stepped manner towards the inside. On the upper end surface 312D and lower end surface of the third return portion 31D... At least one of the surfaces 313D has a third protrusion 33D. The third protrusion 33D moves to a position near the front of the third vertical wall portions 412DT and 413DT in the forward position of the third belt folding member 3D, causing the third belt 1M to bend in a generally stepped shape between the third protrusion 33D and the third vertical wall portions 412DT and 413DT. In the retracted position of the third belt folding member 3D, it moves into the second opening portion 42D, thereby releasing the bending of the third belt 1M.

[0126] Furthermore, a guide protrusion 314D, which has approximately the same shape as the guide protrusion 314 of the third belt folding member 3D, is formed on the third belt folding member 3D. Guide grooves 431D for engaging the guide protrusion 314D are formed on the left and right sidewall portions 43D of the second fastener 4D. The guide grooves 431D are formed in such a way that they pass through the sidewall portion 43D parallel to the belt width direction R3 from the forward position to the backward position of the third belt folding member 3D. In addition, in the third protrusion portion 33D, the rear end side is formed to be the highest, and the front end side is formed to gradually decrease in a certain way.

[0127] Furthermore, similar to the fold-back portion 31, the third fold-back portion 31D is formed by separating left and right sides at the center of the belt width direction R3, and the separated left and right fold-back portions 31D are connected in a roughly U-shape via the gripping portion 32D. Moreover, a pair of abutment seats 315D facing each other with a predetermined gap d5 are formed on the central side of the separated left and right fold-back portions 31D. Therefore, when the third belt fold-back member 3D is moved to the forward position and the third belt 1M is fixed to the second fastener 4D, even if the third belt 1M is pulled forcefully, the abutment seats 315D will abut against each other and provide support, so the guide protrusion 314D can remain engaged within the guide groove 431D. Thus, the third belt fold-back member 3D can be prevented from falling off the second fastener 4D, thereby reliably fixing the third belt 1M to the second fastener 4D.

[0128] Because the belt adjustment and holding device 10D of this fourth embodiment is structured as described above, when the third belt 1M is secured to the second fastener 4D, the third belt fold-back member 3D moves together with the folded-back third belt 1M towards the forward position. This allows the third belt 1M to bend in a generally stepped shape between the third vertical wall portions 412DT, 413DT and the third protrusion 33D, thus preventing movement of the third belt 1M by means of its deformation resistance. Furthermore, the third belt fold-back member 3D cannot move forward relative to the second fastener 4D from the forward position, so even if the third belt 1M is pulled forcefully, it will not move relative to the second fastener 4D. Therefore, by simply moving the third belt fold-back member 3D together with the folded-back third belt 1M towards the forward position, the third belt 1M can be easily secured to the second fastener 4D.

[0129] Furthermore, when adjusting the length of the third strap 1M relative to the second fastener 4D, it is only necessary to move the third strap folding member 3D and the folded-back third strap 1M together to the rearward position. That is, by moving the third strap folding member 3D to the rearward position, the third protrusion 33D can be moved into the second opening 42D. Therefore, the third strap 1M wrapped around the third folded portion 31D on the third strap folding member 3D, which has moved to the rearward position, is freed from the bending caused by the third protrusion 33D and the third upright portions 412DT and 413DT, and can thus move freely within the second opening 42D. Therefore, the length of the third strap 1M can be easily adjusted relative to the second fastener 4D simply by moving the third strap folding member 3D and the folded-back third strap 1M together to the rearward position.

[0130] Furthermore, when the third belt folding member 3D and the folded third belt 1M are moved together to the forward position, the third belt 1M is bent in a roughly stepped shape between the third vertical wall portions 412DT, 413DT and the third protrusion 33D. Therefore, to move the third belt folding member 3D from the forward position to the backward position, the third protrusion 33D and the bent third belt 1M need to pass over the third vertical wall portions 412DT, 413DT together. Thus, the third belt folding member 3D is locked in the forward position by the bent third belt 1M. Therefore, even when the third belt 1M is not in use, the third belt 1M will not shift relative to the second fastener 4D, so the readjustment of the belt adjustment and holding device 10D every time the third belt 1M is used is not required.

[0131] Furthermore, since the front end of the second opening 42D on the second fastener 4D has a roughly rectangular third strap insertion portion 41D that is formed so as to allow the third strap 1M for length adjustment to be inserted rearward, and the strap adjustment and holding device 10D has a third strap folding member 3D, the third strap folding member 3D has a third folding portion 31D and a third gripping portion 32D. The third folding portion 31D is formed so that it can wrap the third strap 1M around the rear end 311D in the second opening 42D and fold back forward. The third gripping portion 32D is formed on the front end of the third folding portion 31D and is formed so that it can protrude forward from the third strap insertion portion 41D together with the folded third strap 1M. The third strap folding member 3D is formed so that it can move in and out in the front-back direction R1 within the second fastener 4D and is roughly plate-shaped, the thickness of the third folding portion 31D in the vertical direction R2 is formed to be the minimum thickness required to fold back the third strap 1M. Thus, the thickness of the device can be easily avoided from being too large. Therefore, according to the belt adjustment and holding device 10D of the fourth embodiment described above, a belt adjustment and holding device 10D can be provided that has a thickness that is not too large, can easily adjust and hold the length of the belts 1 and 1M, and does not require readjustment for each use.

[0132] Furthermore, in the belt adjustment and holding device 10D of this fourth embodiment, it is preferable that the third protrusion 33D is formed at multiple positions on the upper end face 312D and lower end face 313D of the third fold-back portion 31D at different positions in the belt width direction R3. A fifth protrusion 412DT1 is formed on the third vertical wall portion 412DT formed on the upper inner wall surface 412D of the third belt insertion portion 41D, which protrudes inward at a position opposite to the third protrusion 33D formed on the upper end face 312D of the third fold-back portion 31D. A sixth protrusion 413DT1 is formed on the third vertical wall portion 413DT formed on the lower inner wall surface 413D of the third belt insertion portion 41D, which protrudes inward at a position opposite to the third protrusion 33D formed on the lower end face 313D of the third fold-back portion 31D. The third belt fold-back member 3D is configured to move forward and backward in the second fastener 4D in the front-back direction R1 in a state of upside down inversion.

[0133] In this case, with the third belt retraction member 3D (which does not rotate upside down) and the retracted third belt 1M moved to the forward position, the gap between the fifth protrusion 412DT1 and the upper end face 312D of the third retraction portion 31D is reduced to the height of the fifth protrusion 412DT1 when the fifth protrusion 412DT1 faces the third protrusion 33D, and the gap between the sixth protrusion 413DT1 and the lower end face 313D of the third retraction portion 31D is reduced to the height of the sixth protrusion 413DT1 when the sixth protrusion 413DT1 faces the third protrusion 33D. Therefore, even for the belt 1M, which has a relatively thin wall thickness compared to the gap between the third vertical wall portions 412DT, 413DT and the third retraction portion 31D, the third belt 1M can be bent in a roughly stepped shape between the third protrusion 33D and each of the fifth protrusion 412DT1 and the sixth protrusion 413DT1. Therefore, even a thinner band 1M can be firmly fixed to the second fastener 4D.

[0134] On the other hand, when the third belt folding member 3D is reversed vertically relative to the second fastener 4D, the third protrusion 33D is positioned differently in the belt width direction R3 relative to the fifth protrusion 412DT1 and the sixth protrusion 413DT1. Therefore, when the vertically reversed third belt folding member 3D moves to the forward position together with the folded belt 1M, the third belt 1M can bend in a roughly stepped manner between the third vertical wall portions 412DT, 413DT and the third protrusion 33D without being affected by the fifth protrusion 412DT1 and the sixth protrusion 413DT1, thereby using its deformation resistance to prevent the movement of the third belt 1M. Therefore, when the vertically reversed third belt folding member 3D moves to the forward position, compared with the case where the vertically reversed third belt folding member 3D is not reversed, the thicker belt 1M can be firmly fixed to the second fastener 4D. As a result, in a device with adjustment and holding mechanism 10D, the lengths of multiple straps 1M with different wall thicknesses can be adjusted and maintained by the simple operation of inverting the third strap folding member 3D upside down and installing it onto the second fastener 4D.

[0135] Furthermore, in the belt adjustment and holding device 10D of this fourth embodiment, it is preferable that a fifth inclined surface 412DT2 is formed on the front end side of the fifth protrusion 412DT1, which is inclined forward and upward toward the upper inner wall surface 412D in the third belt insertion portion 41D, and a sixth inclined surface 413DT2 is formed on the front end side of the sixth protrusion 413DT1, which is inclined forward and downward toward the lower inner wall surface 413D in the third belt insertion portion 41D.

[0136] In this case, for example, when the third belt folding member 3D (which does not rotate vertically) is moved from the forward position to the backward position, the third belt 1M, bent by the third protrusion 33D formed on the upper end face 312D of the third folding portion 31D, presses the fifth protrusion 412DT1 upward via the fifth inclined surface 412DT2, and the third belt 1M, bent by the third protrusion 33D formed on the lower end face 313D of the third folding portion 31D, presses the sixth protrusion 413DT1 downward via the sixth inclined surface 413DT2. This causes the upper inner wall surface 412D and the lower inner wall surface 413D of the third belt insertion portion 41D to bend elastically, thereby easily widening the gap between them. Therefore, the force required to move the third belt folding member 3D from the forward position to the backward position can be reduced, allowing the length of the third belt 1M to be adjusted relative to the second fastener 4D with less operating force.

[0137] Furthermore, in the belt adjustment and holding device 10D of this fourth embodiment, it is preferable that a fifth inclined surface 412DT2 is formed on the front end side of the fifth protrusion 412DT1, which is inclined forward and upward toward the upper inner wall surface 412D in the third belt insertion portion 41D, and a sixth inclined surface 413DT2 is formed on the front end side of the sixth protrusion 413DT1, which is inclined forward and downward toward the lower inner wall surface 413D in the third belt insertion portion 41D.

[0138] In this case, for example, when the third belt folding member 3D (which does not rotate vertically) is moved from the forward position to the backward position, the third belt 1M, bent by the third protrusion 33D formed on the upper end face 312D of the third folding portion 31D, presses the fifth protrusion 412DT1 upward via the fifth inclined surface 412DT2, and the third belt 1M, bent by the third protrusion 33D formed on the lower end face 313D of the third folding portion 31D, presses the sixth protrusion 413DT1 downward via the sixth inclined surface 413DT2. This causes the upper inner wall surface 412D and the lower inner wall surface 413D of the third belt insertion portion 41D to bend elastically, thereby easily widening the gap between them. Therefore, the force required to move the third belt folding member 3D from the forward position to the backward position can be reduced, allowing the length of the third belt 1M to be adjusted relative to the second fastener 4D with less operating force.

[0139] <Effects>

[0140] As detailed above, the belt adjustment and holding devices 10, 10B, 10C, and 10D according to this embodiment include: device bodies 2, 2B, 2C, and 2D. Each device body 2, 2B, 2C, and 2D has a belt insertion portion 21 and an opening portion 22. The belt insertion portion 21 is formed in a generally rectangular shape at its rear end 211 so that a belt 1 can be inserted forward. The opening portion 22 communicates with the belt insertion portion 21 and is formed along a vertical direction R2 orthogonal to the insertion direction of the belt 1. The device is roughly rectangular in shape and has a folding member 3, which has a folding portion 31 and a gripping portion 32. The folding portion 31 is configured to wrap the strap 1 around the front end 311 in the opening 22 and fold back. The gripping portion 32 is formed on the rear end side of the folding portion 31 and is configured to protrude rearward from the strap insertion portion 21 together with the folded strap 1. The folding member 3 is configured to move forward and backward in the front-back direction R1 within the device body 2, 2B, 2C, and 2D, and is roughly plate-shaped. The upper inner wall surface 212 and lower inner wall surface 213 of the belt 1 are formed with vertical wall portions 212T and 213T that are stepped inward on the side of the opening 22 between the left and right side wall portions 23 in a generally continuous manner along the belt width direction R3. A protrusion 33 is formed on at least one of the upper end surface 312 and lower end surface 313 of the folded-back portion 31. The protrusion 33 moves to a position near the rear of the vertical wall portions 212T and 213T at the retracted position P1 of the belt folded-back member 3, so that the belt 1 is between the protrusion 33 and the belt folded-back member 3. The vertical wall portions 212T and 213T bend in a roughly stepped shape. The tape 1 is released from its bend when it moves from the forward position P2 of the tape folding member 3 into the opening 22. Therefore, when fixing the tape 1 to the device bodies 2, 2B, 2C, and 2D, the tape folding member 3 moves together with the folded tape 1 to the backward position P1. This allows the tape 1 to bend in a roughly stepped shape between the vertical wall portions 212T and 213T and the protrusion 33, using its deformation resistance to prevent movement of the tape 1. Furthermore, the tape folding member 3 cannot move rearward relative to the device bodies 2, 2B, 2C, and 2D from the backward position P1. Therefore, even if the tape 1 is pulled forcefully, it will not move relative to the device bodies 2, 2B, 2C, and 2D. Therefore, by simply moving the folding member 3 together with the folded-back strap 1 toward the backward position P1, the strap 1 can be easily fixed to the main body 2, 2B, 2C, and 2D of the device.

[0141] Furthermore, when adjusting the length of the strap 1 relative to the main bodies 2, 2B, 2C, and 2D, it is only necessary to move the strap folding member 3 together with the folded-back strap 1 towards the forward position P2. That is, by moving the strap folding member 3 towards the forward position P2, the protrusion 33 of the folded-back portion 31 can be moved into the opening 22. Therefore, the strap 1 wrapped around the folded-back portion 31 on the strap folding member 3, which has moved to the forward position P2, is released from the restraint imposed by the protrusion 33 and the vertical wall portions 212T and 213T, and can thus move freely within the opening 22. Therefore, the length of the strap 1 can be easily adjusted relative to the main bodies 2, 2B, 2C, and 2D simply by moving the strap folding member 3 together with the folded-back strap 1 towards the forward position P2.

[0142] Furthermore, when the belt folding member 3 and the folded belt 1 are moved together to the retracted position P1, the belt 1 is bent in a roughly stepped shape between the upright portions 212T and 213T and the protrusion 33. Therefore, to move the belt folding member 3 from the retracted position P1 to the forward position P2, the protrusion 33 and the bent belt 1 need to pass over the upright portions 212T and 213T together. Thus, the belt folding member 3 is locked in the retracted position P1 by the bent belt 1. Therefore, even when the belt 1 is not in use, the belt 1 will not shift relative to the device bodies 2, 2B, 2C, and 2D, so the belt adjustment and holding devices 10, 10B, 10C, and 10D do not need to be readjusted every time the belt 1 is used.

[0143] Furthermore, the device comprises: device bodies 2, 2B, 2C, and 2D, each having a strap insertion portion 21 and an opening portion 22. The strap insertion portion 21 is formed in a generally rectangular shape at the rear end 211 so that the strap 1 can be inserted forward. The opening portion 22 communicates with the strap insertion portion 21 and is formed in a generally rectangular shape along a vertical direction R2 orthogonal to the insertion direction of the strap 1; and a strap folding member 3, which has a folding portion 31 and a gripping portion 32. The folding portion 31 is formed so that it can grip the opening portion 21. The tape 1 is wrapped around the front end 311 of part 22 and folded back. The gripping part 32 is formed on the rear end side of the folded part 31 and is configured to protrude rearward from the tape insertion part 21 together with the folded tape 1. The tape folding member 3 is configured to move in and out in the front-back direction R1 within the device body 2, 2B, 2C, 2D and is approximately plate-shaped. Therefore, the thickness d1 of the vertical direction R2 of the folded part 31 of the tape folding member 3 is formed to be the minimum thickness required for folding back the tape 1. Thus, it is easy to avoid the thickness d2 of the device being too large.

[0144] Therefore, according to this embodiment, a belt adjustment and holding device 10, 10B, 10C, 10D can be provided that has a thickness that is not too large, can easily adjust and maintain the length of the belt 1, and does not require readjustment for each use.

[0145] Furthermore, according to this embodiment, the upper end face 312 and the lower end face 313 of the fold-back portion 31 are formed parallel to each other. The protrusion 33 has a front wall surface 331 that is vertically erected relative to the upper end face 312 or the lower end face 313 and a rear inclined surface 332 that is obliquely inclined at an acute angle relative to the upper end face 312 or the lower end face 313. Therefore, when the belt fold-back member 3 is moved from the forward position P2 to the backward position P1, the rear inclined surface 332 of the protrusion 33 is used to press the upright wall portions 212T and 213T, causing the upper inner wall surface 212 and the lower inner wall surface 213 of the belt insertion portion 21 to bend elastically, thereby easily widening the gap between them. Therefore, the force required to move the belt fold-back member 3 to the backward position P1 can be reduced, thereby allowing the belt 1 to be fixed to the device body 2, 2B, 2C, and 2D with less operating force.

[0146] On the other hand, since the protrusion 33 has a front wall surface 331 that stands vertically forward relative to the upper end surface 312 or the lower end surface 313, when the belt folding member 3 and the folded belt 1 are moved together to the retracted position P1, the belt 1 can be bent at an angle closer to a right angle between the upright wall portions 212T, 213T and the front wall surface 331 of the protrusion 33, which increases its deformation resistance. Therefore, when the belt folding member 3 is moved to the retracted position P1, the belt 1 can be more firmly fixed to the device body 2, 2B, 2C, 2D in a controlled manner.

[0147] Furthermore, according to this embodiment, multiple protrusions 33 are formed at different positions on the upper end face 312 and lower end face 313 of the folded-back portion 31 in the width direction R3. A first protrusion 212T1 is formed on the vertical wall portion 212T formed on the upper inner wall surface 212, protruding inward at a position facing the protrusions 33 formed on the upper end face 312 of the folded-back portion 31. A second protrusion 212T1 is formed on the vertical wall portion 213T formed on the lower inner wall surface 213, protruding inward at a position facing the protrusions 33 formed on the lower end face 313 of the folded-back portion 31. With two protrusions 213T1, when the non-vertically reversible belt folding member 3 and the folded-back belt 1 are moved to the retracted position P1, the gap between the first protrusion 212T1 and the upper end face 312 of the folded-back portion 31 is reduced to the height of the first protrusion 212T1 at the position where the first protrusion 212T1 faces the protrusion 33, and the gap between the second protrusion 213T1 and the lower end face 313 of the folded-back portion 31 is reduced to the height of the second protrusion 213T1 at the position where the second protrusion 213T1 faces the protrusion 33. Therefore, even for the belt 1, which has a relatively thin wall thickness compared to the gap between the upright wall portions 212T, 213T and the folded-back portion 31, the belt 1 can be bent in a roughly stepped shape between the protrusion 33 of the folded-back portion 31 and the first protrusion 212T1 and the second protrusion 213T1 of the belt insertion portion 21. Therefore, even the thinner-walled strip 1 can be firmly fixed to the main body 2, 2B, 2C, and 2D of the device.

[0148] On the other hand, since the belt folding member 3 is formed to move forward and backward in the front-back direction R1 within the device bodies 2, 2B, 2C, and 2D while inverted, the protrusion 33 of the folding part 31 is positioned at different locations in the belt width direction R3 relative to the first protrusion 212T1 and the second protrusion 213T1 of the belt insertion part 21 when the belt folding member 3 is inverted relative to the device bodies 2, 2B, 2C, and 2D. Therefore, when the belt folding member 3, after being inverted, moves together with the folded belt 1 to the retracted position P1, the belt 1 can be bent in a roughly stepped shape between the upright parts 212T and 213T and the protrusion 33 without being affected by the first protrusion 212T1 and the second protrusion 213T1, thereby using its deformation resistance to prevent the movement of the belt 1. Therefore, when the belt folding member 3, after being inverted, is moved to the retracted position P1, compared to the case where the belt folding member 3 is not inverted, the thicker belt 1 can be firmly fixed to the device bodies 2, 2B, 2C, and 2D. As a result, in one belt adjustment and holding device 10, 10B, 10C, and 10D, the length of multiple belts 1 with different wall thicknesses can be adjusted and maintained by the simple operation of installing the belt folding member 3 onto the device bodies 2, 2B, 2C, and 2D after inverting it.

[0149] Furthermore, according to this embodiment, a first inclined surface 212T2 is formed on the rear end side of the first protrusion 212T1, which is inclined upward toward the upper inner wall surface 212, and a second inclined surface 213T2 is formed on the rear end side of the second protrusion 213T1, which is inclined downward toward the lower inner wall surface 213. Therefore, when the non-vertically reversed belt folding member 3 moves from the retracted position P1 to the forward position P2, the belt 1, which is bent by the protrusion 33 formed on the upper end surface 312 of the folding part 31, presses the first protrusion 212T1 upward via the first inclined surface 212T2, and the belt 1, which is bent by the protrusion 33 formed on the lower end surface 313 of the folding part 31, presses the second protrusion 213T1 downward via the second inclined surface 213T2. This causes the upper inner wall surface 212 and the lower inner wall surface 213 of the belt insertion part 21 to bend elastically, thereby easily widening the gap between them. Therefore, the force required to move the belt folding member 3 from the retracted position P1 to the forward position P2 can be reduced, thereby allowing the length of the belt 1 to be adjusted relative to the device body 2, 2B, 2C, 2D with less operating force.

[0150] Furthermore, according to this embodiment, guide grooves 231 are formed on the left and right sidewall portions 23 of the device bodies 2, 2B, 2C, and 2D along the front-rear direction R1, which allow the belt folding member 3 to move between the forward position P2 and the backward position P1. Guide protrusions 314 that engage with the guide grooves 231 are formed on the left and right outer ends of the folding portions 31. The folding portions 31 are formed by separating the left and right sides at the center in the belt width direction R3. The separated left and right folding portions 31 are connected in a roughly U-shape via the gripping portion 32. Therefore, the left and right folding portions 31 are displaced along the up-down direction while the center portions overlap each other, so that the guide protrusions 314 formed on the folding portions 31 engage with the guide grooves 231 formed on the sidewall portions 23 of the device bodies 2, 2B, 2C, and 2D. Thus, the belt folding member 3 can be easily installed in the device bodies 2, 2B, 2C, and 2D. Furthermore, the belt folding member 3 can be moved to the forward position P2 by moving the guide protrusion 314 to the front end of the guide groove 231, thereby easily adjusting the length of the belt 1. Furthermore, the belt folding member 3 can be moved to the retracted position P1 by moving the guide protrusion 314 to the rear end of the guide groove 231, thereby easily securing the belt 1. Therefore, the belt folding member 3 can be easily installed within the device bodies 2, 2B, 2C, and 2D, making it easier to adjust the length of the belt 1 and secure the adjusted belt 1 to the device bodies 2, 2B, 2C, and 2D.

[0151] Furthermore, according to this embodiment, a fastener 4 is provided. The fastener 4 has a length-fixing strap 1K fixed to its base end 41 side and a locking claw 421 formed on its top end 42 side. A fastener storage portion 24 and a locking protrusion 241 are formed on the front end side of the opening 22 on the device body 2. The fastener storage portion 24 stores the fastener 4 in a detachable manner, and the locking protrusion 241 is located inside the fastener storage portion 24 and engages with the locking claw 421 of the fastener 4. Therefore, the length-adjusting strap 1 can be fixed in an adjustable manner at the rear end side of the device body 2 via the strap fold-back member 3, and the length-fixing strap 1K can be detachably connected to the fastener storage portion 24 formed on the front end side of the device body 2 via the fastener 4. Therefore, the strap fold-back member 3 and the fastener 4 can be arranged adjacent to each other in the front-rear direction R1 of the device body 2, and the strap fold-back member 3 and the fastener 4 will not overlap in the vertical direction R2. As a result, the device can be made thinner, which improves its appearance and enhances its usability and operability.

[0152] Furthermore, according to this embodiment, a strap fixing frame 25 is formed on the front end side of the opening 22 on the device body 2B, and a length-fixing strap 1K is fixed on the strap fixing frame 25. Therefore, the length-adjusting strap 1 can be fixed in an adjustable manner on the rear end side of the device body 2B via the strap folding member 3, and the length-fixing strap 1K can be fixed on the front end side of the device body 2B via the strap fixing frame 25. Therefore, the device body 2B connecting the two straps 1 and 1K can be miniaturized and made thinner, thereby improving usability and operability during use. Therefore, a strap adjustment and holding device 10B can be provided that does not have excessive thickness and can easily adjust and maintain the length of the strap 1.

[0153] Furthermore, according to this embodiment, a second belt insertion portion 21C, which is generally rectangular, is provided at the front end of the opening 22 on the device body 2C so that a second belt 1L for length adjustment can be inserted rearward. The belt adjustment and holding device 10C includes a second belt folding member 3C, which has a second folding portion 31C and a second gripping portion 32C. The second folding portion 31C is configured to wrap around the second belt 1L in the opening 22 at the rear end 311C and fold back forward. The second gripping portion 32C is formed at the front end of the second folding portion 31C and is configured to protrude forward from the second belt insertion portion 21C together with the folded second belt 1L. The second belt folding member 3C is configured to move forward and backward in the device body 2C in a front-back direction R1 and is generally plate-shaped. The upper inner wall surface 212C and the lower inner wall surface 213C of the second belt insertion portion 21C are formed in a generally continuous manner along the belt width direction R3 between the left and right side wall portions 23. The second vertical wall portions 212CT and 213CT, which stand in a stepped shape facing inwards, have a second protrusion 33C formed on at least one of the upper end face 312C and lower end face 313C of the second fold-back portion 31C. The second protrusion 33C moves from the advancing position of the second belt fold-back member 3C to a position close to the front of the second vertical wall portions 212CT and 213CT, so that the second belt 1L forms a roughly stepped shape between the second protrusion 33C and the second vertical wall portions 212CT and 213CT. The second belt 1L is bent in a stepped manner. As the second belt fold-back member 3C moves from its retracted position into the opening 22, the bending of the second belt 1L is released. Therefore, when fixing the second belt 1L to the device body 2C, the second belt fold-back member 3C moves together with the folded-back second belt 1L towards the forward position. This allows the second belt 1L to bend approximately in a stepped manner between the second vertical wall portions 212CT, 213CT and the second protrusion 33C, using its deformation resistance to prevent movement of the second belt 1L. Furthermore, the second belt fold-back member 3C cannot move forward relative to the device body 2C from the forward position. Therefore, even if the second belt 1L is pulled forcefully, it will not move relative to the device body 2C. Thus, by simply moving the second belt fold-back member 3C together with the folded-back second belt 1L towards the forward position, the second belt 1L can be easily fixed to the device body 2C.

[0154] Furthermore, when adjusting the length of the second strap 1L relative to the device body 2C, it is only necessary to move the second strap folding member 3C and the folded-back second strap 1L together to a rearward position. That is, by moving the second strap folding member 3C to a rearward position, the second protrusion 33C can be moved into the opening 22. Therefore, the second strap 1L wrapped around the second folded-back portion 31C on the second strap folding member 3C, which has moved to the rearward position, is freed from the bending caused by the second protrusion 33C and the second vertical wall portions 212CT and 213CT, and can thus move freely within the opening 22. Therefore, the length of the second strap 1L can be easily adjusted relative to the device body 2C simply by moving the second strap folding member 3C and the folded-back second strap 1L together to a rearward position.

[0155] Furthermore, when the second belt folding member 3C is moved to the forward position together with the folded second belt 1L, the second belt 1L bends in a roughly stepped shape between the second vertical wall portions 212CT and 213CT and the second protrusion 33C. Therefore, to move the second belt folding member 3C from the forward position to the backward position, the second protrusion 33C and the bent second belt 1L need to pass over the second vertical wall portions 212CT and 213CT together. Thus, the second belt folding member 3C is locked in the forward position by the bent second belt 1L. Therefore, even when the second belt 1L is not in use, the second belt 1L will not shift relative to the device body 2C, so the belt adjustment and holding device 10C does not need to be readjusted every time the second belt 1L is used.

[0156] Furthermore, since the front end of the opening 22 on the main body 2C of the device has a generally rectangular second strap insertion portion 21C that allows for the rearward insertion of a second strap 1L for length adjustment, and the strap adjustment and holding device 10C has a second strap folding member 3C, the second strap folding member 3C has a second folding portion 31C and a second gripping portion 32C. The second folding portion 31C is configured to wrap around the second strap 1L in the opening 22 at the rear end 311C and fold back forward. The second gripping portion 32C is formed on the front end of the second folding portion 31C and is configured to protrude forward from the second strap insertion portion 21C together with the folded second strap 1L. The second strap folding member 3C is configured to move forward and backward in the front-back direction R1 within the main body 2C and is generally plate-shaped. Therefore, by making the thickness of the second folding portion 31C in the vertical direction R2 the minimum thickness required to fold back the second strap 1L, it is easy to avoid the device being too thick. Therefore, according to this embodiment, a belt adjustment and holding device 10C can be provided that has a thickness that is not too large, can easily adjust and maintain the length of the belts 1 and 1L, and does not require readjustment for each use.

[0157] Furthermore, according to this embodiment, multiple second protrusions 33C are formed at different positions on the upper end face 312C and lower end face 313C of the second fold-back portion 31C in the belt width direction R3. A third protrusion 212CT1 is formed on the second vertical wall portion 212CT formed on the upper inner wall surface 212C of the second belt insertion portion 21C, protruding inwardly at a position opposite to the second protrusions 33C formed on the upper end face 312C of the second fold-back portion 31C. A second protrusion 33C is formed on the second vertical wall portion 213CT formed on the lower inner wall surface 213C of the second belt insertion portion 21C, and a second protrusion 33 is formed on the lower end face 313C of the second fold-back portion 31C. The fourth protrusion 213CT1 protrudes inward at the position facing C. Therefore, when the second belt folding member 3C, which does not rotate upside down, moves together with the folded second belt 1L to the forward position, the gap between the third protrusion 212CT1 and the upper end face 312C of the second folding part 31C is reduced to the height of the third protrusion 212CT1 at the position facing the second protrusion 33C, and the gap between the fourth protrusion 213CT1 and the lower end face 313C of the second folding part 31C is reduced to the height of the fourth protrusion 213CT1 at the position facing the second protrusion 33C. Therefore, even for the strip 1L, which has a relatively thin wall thickness compared to the gap between the second vertical wall portions 212CT, 213CT and the second fold-back portion 31C, the second strip 1L can be bent in a roughly stepped shape between the second protrusion 33C and each of the third protrusion 212CT1 and the fourth protrusion 213CT1. Thus, even the relatively thin strip 1L can be firmly fixed to the device body 2C.

[0158] On the other hand, the second belt folding member 3C is configured to move forward and backward in the front-back direction R1 within the device body 2C while inverted. Therefore, when the second belt folding member 3C is inverted relative to the device body 2C, the second protrusion 33C is positioned at different locations in the belt width direction R3 relative to the third protrusion 212CT1 and the fourth protrusion 213CT1. Thus, when the inverted second belt folding member 3C and the folded belt 1L are moved together to the forward position, the second belt 1L can be bent in a roughly stepped shape between the second vertical wall portions 212CT, 213CT and the second protrusion 33C without being affected by the third protrusion 212CT1 and the fourth protrusion 213CT1, thereby using its deformation resistance to prevent the movement of the second belt 1L. Therefore, when the second belt folding member 3C, after being inverted, is moved to the forward position, the thicker belt can be more securely fixed to the device body 2C compared to the case where the second belt folding member 3C is not inverted. As a result, in a belt adjustment and holding device 10C, the length of multiple belts 1L with different wall thicknesses can be adjusted and maintained by the simple operation of installing the second belt folding member 3C onto the device body 2C after inverting it.

[0159] Furthermore, according to this embodiment, a second fastener 4D is provided. The second fastener 4D has a third strap 1M for length adjustment fixed in an adjustable manner at its base end 4K side, and a locking claw 421 is formed at its top end 42 side. A fastener storage part 24 and a locking protrusion 241 are formed at the front end side of the opening 22 on the device body 2D. The fastener storage part 24 stores the second fastener 4D in a detachable manner. The locking protrusion 241 is located in the fastener storage part 24 and engages with the locking claw 421 of the second fastener 4D. Therefore, the length adjustment strap 1 can be fixed in an adjustable manner at the rear end side of the device body 2D via the strap folding member 3. The third strap 1M for length adjustment is connected to the fastener storage part 24 formed at the front end side of the device body 2D via the second fastener 4D in a manner that allows for length adjustment and detachment. Therefore, the fold-back member 3 and the second fastener 4D can be arranged adjacent to each other in the front-rear direction R1 of the main body 2D, and the fold-back member 3 and the second fastener 4D will not overlap in the vertical direction R2. As a result, the device can be made thinner, which improves its appearance and also enhances its usability and operability.

[0160] Furthermore, according to this embodiment, the base end portion 4K of the second fastener 4D has a third strap insertion portion 41D and a second opening portion 42D. The third strap insertion portion 41D is formed in a generally rectangular shape so that the third strap 1M can be inserted from the front end portion 411D to the rear. The second opening portion 42D communicates with the third strap insertion portion 41D and is formed in a roughly rectangular shape along a vertical direction R2 orthogonal to the insertion direction of the third strap 1M. The strap adjustment and holding device 10D has a third strap folding member 3D, which has a third folding portion 3. The third gripping part 32D and the third folding part 31D are configured to wrap around the third strap 1M in the rear end 311D within the second opening 42D and fold back forward. The third gripping part 32D is formed on the front end side of the third folding part 31D and is configured to protrude forward from the third strap insertion part 41D together with the folded-back third strap 1M. The third strap folding member 3D is configured to move forward and backward in the front-back direction R1 within the second fastener 4D and is generally plate-shaped. On the upper inner wall surface 412D and the lower inner wall surface 413D of the third strap insertion part 41D, at the second fastener... Between the left and right sidewall portions 43D on the fastener 4D, a third vertical wall portion 412DT and 413DT are formed in a generally continuous manner along the belt width direction R3, with the third wall portion 412DT and 413DT rising in a stepped shape towards the inside from the second opening portion 42D. A third protrusion 33D is formed on at least one of the upper end face 312D and the lower end face 313D of the third fold-back portion 31D. The third protrusion 33D moves to a position close to the front of the third vertical wall portion 412DT and 413DT in the advancing position of the third belt fold-back member 3D, so that the third belt 1M is between the third protrusion 33D and the third vertical wall portion 412DT and 413DT. The third strap 1M bends approximately in a stepped shape between portions 412DT and 413DT. Moving from the retracted position of the third strap fold-back member 3D into the second opening 42D releases the bend. Therefore, when securing the third strap 1M to the second fastener 4D, the third strap fold-back member 3D moves together with the folded-back third strap 1M towards the forward position. This allows the third strap 1M to bend approximately in a stepped shape between the third vertical wall portions 412DT and 413DT and the third protrusion 33D, using its deformation resistance to prevent movement of the third strap 1M. Furthermore, the third strap fold-back member 3D cannot move forward relative to the second fastener 4D from the forward position. Therefore, even if the third strap 1M is pulled forcefully, it will not move relative to the second fastener 4D. Thus, by simply moving the third strap fold-back member 3D together with the folded-back third strap 1M towards the forward position, the third strap 1M can be easily secured to the second fastener 4D.

[0161] Furthermore, when adjusting the length of the third strap 1M relative to the second fastener 4D, it is only necessary to move the third strap folding member 3D and the folded-back third strap 1M together to the rearward position. That is, by moving the third strap folding member 3D to the rearward position, the third protrusion 33D can be moved into the second opening 42D. Therefore, the third strap 1M wrapped around the third folded portion 31D on the third strap folding member 3D, which has moved to the rearward position, is freed from the bending caused by the third protrusion 33D and the third upright portions 412DT and 413DT, and can thus move freely within the second opening 42D. Therefore, the length of the third strap 1M can be easily adjusted relative to the second fastener 4D simply by moving the third strap folding member 3D and the folded-back third strap 1M together to the rearward position.

[0162] Furthermore, when the third belt folding member 3D and the folded third belt 1M are moved together to the forward position, the third belt 1M is bent in a roughly stepped shape between the third vertical wall portions 412DT, 413DT and the third protrusion 33D. Therefore, to move the third belt folding member 3D from the forward position to the backward position, the third protrusion 33D and the bent third belt 1M need to pass over the third vertical wall portions 412DT, 413DT together. Thus, the third belt folding member 3D is locked in the forward position by the bent third belt 1M. Therefore, even when the third belt 1M is not in use, the third belt 1M will not shift relative to the second fastener 4D, so the readjustment of the belt adjustment and holding device 10D every time the third belt 1M is used is not required.

[0163] Furthermore, since the front end of the second opening 42D on the second fastener 4D has a roughly rectangular third strap insertion portion 41D that is formed so as to allow the third strap 1M for length adjustment to be inserted rearward, and the strap adjustment and holding device 10D has a third strap folding member 3D, the third strap folding member 3D has a third folding portion 31D and a third gripping portion 32D. The third folding portion 31D is formed so that it can wrap the third strap 1M around the rear end 311D in the second opening 42D and fold back forward. The third gripping portion 32D is formed on the front end of the third folding portion 31D and is formed so that it can protrude forward from the third strap insertion portion 41D together with the folded third strap 1M. The third strap folding member 3D is formed so that it can move in and out in the front-back direction R1 within the second fastener 4D and is roughly plate-shaped, the thickness of the third folding portion 31D in the vertical direction R2 is formed to be the minimum thickness required to fold back the third strap 1M. Thus, the thickness of the device can be easily avoided from being too large. Therefore, according to this embodiment, a belt adjustment and holding device 10D can be provided that has a thickness that is not too large, can easily adjust and maintain the length of the belts 1 and 1M, and does not require readjustment for each use.

[0164] Furthermore, according to this embodiment, multiple third protrusions 33D are formed at different positions on the upper end face 312D and lower end face 313D of the third fold-back portion 31D in the belt width direction R3. A fifth protrusion 412DT1 is formed on the third vertical wall portion 412DT formed on the upper inner wall surface 412D of the third belt insertion portion 41D, which protrudes inward at a position opposite to the third protrusions 33D formed on the upper end face 312D of the third fold-back portion 31D. A sixth protrusion 413 is formed on the third vertical wall portion 413DT formed on the lower inner wall surface 413D of the third belt insertion portion 41D, which protrudes inward at a position opposite to the third protrusions 33D formed on the lower end face 313D of the third fold-back portion 31D. DT1, the third belt folding member 3D is formed to be able to move forward and backward in the second fastener 4D in a forward direction R1 while in a state of vertical inversion. Therefore, when the third belt folding member 3D, which is not vertically inverted, moves together with the folded third belt 1M to the forward position, at the position where the fifth protrusion 412DT1 and the third protrusion 33D face each other, the gap between the fifth protrusion 412DT1 and the upper end face 312D of the third folding part 31D is reduced to the height of the fifth protrusion 412DT1. Moreover, at the position where the sixth protrusion 413DT1 and the third protrusion 33D face each other, the gap between the sixth protrusion 413DT1 and the lower end face 313D of the third folding part 31D is reduced to the height of the sixth protrusion 413DT1. Therefore, even for the strap 1M, which has a relatively thin wall thickness compared to the gap between the third upright portions 412DT, 413DT and the third folded portion 31D, the third strap 1M can be bent in a roughly stepped shape between the third protrusion 33D and each of the fifth protrusion 412DT1 and the sixth protrusion 413DT1. Thus, even the relatively thin strap 1M can be firmly fixed to the second fastener 4D.

[0165] On the other hand, when the third belt folding member 3D is reversed vertically relative to the second fastener 4D, the third protrusion 33D is positioned differently in the belt width direction R3 relative to the fifth protrusion 412DT1 and the sixth protrusion 413DT1. Therefore, when the vertically reversed third belt folding member 3D is moved to the forward position together with the folded belt 1M, the third belt 1M can be bent in a roughly stepped manner between the third vertical wall portions 412DT, 413DT and the third protrusion 33D without being affected by the fifth protrusion 412DT1 and the sixth protrusion 413DT1, thereby using its deformation resistance to prevent the movement of the third belt 1M. Therefore, when the vertically reversed third belt folding member 3D is moved to the forward position, compared with the case where the vertically reversed third belt folding member 3D is not reversed, the thicker belt 1M can be firmly fixed to the second fastener 4D. As a result, in a device with adjustment and holding mechanism 10D, the lengths of multiple straps 1M with different wall thicknesses can be adjusted and maintained by the simple operation of inverting the third strap folding member 3D upside down and installing it onto the second fastener 4D.

[0166] <Variation Example>

[0167] The embodiments described in detail above can be modified as appropriate without changing the spirit of the present invention. For example, according to the belt adjustment and holding device 10 of the first embodiment, a plurality of protrusions 33 are formed at different positions on the upper end surface 312 and the lower end surface 313 of the folded-back portion 31 in the belt width direction R3. A first protrusion 212T1 protruding inwardly at a position opposite to the protrusions 33 formed on the upper inner wall surface 212 is formed on the vertical wall portion 212T formed on the upper inner wall surface 212, and a second protrusion 213T1 protruding inwardly at a position opposite to the protrusions 33 formed on the lower inner wall surface 213 is formed on the vertical wall portion 213T formed on the lower inner wall surface 213, but it is not necessarily limited to this.

[0168] For example, multiple protrusions 33 may be formed at the same position on the upper end face 312 and lower end face 313 of the folded-back portion 31 in the width direction R3. In addition, either or both of the first protrusion 212T1 and the second protrusion 213T1 may not be formed on the upright portions 212T and 213T.

[0169] Industrial availability

[0170] The present invention can be used as an adjustable retaining device for the following: a buckle for a trouser strap, a backpack, a handbag with a strap, a waist bag, a helmet, etc., formed to adjust the length of at least one strap and retain the adjusted strap.

[0171] Marker description

[0172] 1, 1K, 1L, 1M… tapes;

[0173] 2, 2B, 2C, 2D… Main body of the device;

[0174] 3. 3C, 3D... with foldback components;

[0175] 4. 4D…button fasteners;

[0176] 4K…base end;

[0177] 10, 10B, 10C, 10D… with adjustment and holding device;

[0178] 21, 21C, 41D… with insertion parts;

[0179] 22, 42D… openings;

[0180] 23, 43D…side wall portion;

[0181] 24… Fastener storage section;

[0182] 25…with fixed frame;

[0183] 31, 31C, 31D… Return section;

[0184] 32, 32C, 32D… gripping parts;

[0185] 33, 33C, 33D…protrusions;

[0186] 41…base end;

[0187] 42…top part;

[0188] 211…rear end;

[0189] 212, 212C, 412D... upper inner wall surface;

[0190] 212T, 212CT, 412DT… vertical wall section;

[0191] 212T1…First protrusion;

[0192] 212T2…First inclined plane;

[0193] 212CT1…Third protrusion;

[0194] 212CT2…Third inclined plane;

[0195] 213, 213C, 413D...lower inner wall surface;

[0196] 213T, 213CT, 413DT… vertical wall section;

[0197] 213T1…Second protrusion;

[0198] 213T2…Second inclined surface;

[0199] 213CT1… Fourth protrusion;

[0200] 213CT2…Fourth inclined plane;

[0201] 231, 431D… guide grooves;

[0202] 241… The protrusion of the card;

[0203] 311…front end;

[0204] 311C, 311D... rear end;

[0205] 312, 312C, 312D… Top surface;

[0206] 313, 313C, 313D… lower end face;

[0207] 314, 314D… guide protrusions;

[0208] 331…front wall;

[0209] 332…backsloping surface;

[0210] 411D…front end;

[0211] 421… Card connector.

Claims

1. A belt adjustment and holding device, the belt adjustment and holding device being configured to adjust the length of at least one belt and hold the adjusted belt, characterized in that, have: The device body has a strap insertion portion and an opening portion. The strap insertion portion is rectangularly shaped and formed at the rear end so that the strap can be inserted forward. The opening portion communicates with the strap insertion portion and is rectangular in shape, formed along a vertical direction orthogonal to the insertion direction of the strap. A folding member has a folding portion and a gripping portion. The folding portion is configured to wrap around the tape in the opening towards the front end and fold back towards the rear. The gripping portion is formed at the rear end of the folding portion and is configured to protrude rearward from the tape insertion portion together with the folded tape. The folding member is plate-shaped and can move forward and backward in the device body. On the upper and lower inner wall surfaces of the belt with the insertion portion, a stepped vertical wall portion is continuously formed along the belt width direction between the left and right side wall portions, facing inward on the opening side. A protrusion is formed on at least one of the upper and lower end faces of the fold-back portion. When the fold-back member is in a retracted position, the protrusion moves to a position near the rear of the upright wall portion, causing the belt to bend in a stepped manner between the protrusion and the upright wall portion to resist movement by means of its deformation resistance. When the fold-back member is in an advancing position, it moves into the opening portion, thus releasing the bending of the belt. Guide grooves are formed on the left and right side walls of the main body of the device in the front-back direction to allow the retractable member to move between the forward and backward positions. Guide protrusions that engage with the guide groove are formed at the left and right outer ends of the folded-back portion.

2. The adjustable holding device according to claim 1, characterized in that, The upper and lower surfaces of the folded-back section are formed parallel to each other. The protrusion has a front wall surface that is vertically erected relative to the upper or lower end surface and a rear inclined surface that is obliquely inclined at an acute angle relative to the upper or lower end surface.

3. The adjustable holding device according to claim 1 or 2, characterized in that, The protrusions are formed at multiple positions on the upper and lower end faces of the folded portion at different locations in the width direction. A first protrusion is formed on the vertical wall portion formed on the upper inner wall surface, protruding inward at a position opposite to the protrusion formed on the upper end surface of the folded portion. A second protrusion is formed on the vertical wall portion formed on the lower inner wall surface, protruding inward at a position opposite to the protrusion formed on the lower end surface of the folded portion. The folding member is configured to move forward and backward within the main body of the device while inverted.

4. The adjustable holding device according to claim 3, characterized in that, A first inclined surface is formed on the rear end side of the first protrusion, which slopes backward and upward toward the upper inner wall surface. A second inclined surface is formed on the rear end side of the second protrusion, which is inclined downward toward the lower inner wall surface.

5. The adjustable holding device according to claim 1 or 2, characterized in that, The folded portion is formed by separating the left and right sides of the central portion in the width direction, and the separated left and right folded portions are connected into a U-shape via the gripping portion.

6. The adjustable holding device according to claim 1 or 2, characterized in that, It is equipped with a snap fastener, which has a length-fixing strap fixed to its base end and a locking claw formed at its top end. A fastener storage portion and a locking protrusion are formed on the front end side of the opening on the main body of the device. The fastener storage portion stores the fastener in a detachable manner, and the locking protrusion is located inside the fastener storage portion and engages with the locking claw of the fastener.

7. The adjustable holding device according to claim 1 or 2, characterized in that, A retaining frame is formed on the front end side of the opening on the main body of the device, and a length-fixing strap is fixed on the retaining frame.

8. The adjustable holding device according to claim 1 or 2, characterized in that, The front end of the opening on the main body of the device has a rectangular second strap insertion part that allows for the rearward insertion of a second strap for length adjustment. The belt adjustment and holding device includes a second belt folding member, which has a second folding portion and a second gripping portion. The second folding portion is configured to wrap around the second belt towards the rear end in the opening and fold back forward. The second gripping portion is formed at the front end of the second folding portion and is configured to protrude forward from the second belt insertion portion together with the folded-back second belt. The second belt folding member is plate-shaped and can move forward and backward within the device body. On the upper and lower inner wall surfaces of the second strip insertion portion, a second vertical wall portion is continuously formed along the strip width direction between the left and right side wall portions, rising in a stepped shape towards the inward side on the opening portion side. A second protrusion is formed on at least one of the upper and lower end faces of the second fold-back portion. The second protrusion moves to a position close to the front of the second vertical wall portion in the forward position of the second belt fold-back member, causing the second belt to bend in a stepped manner between the second protrusion and the second vertical wall portion. In the retracted position of the second belt fold-back member, the protrusion moves into the opening portion, thereby releasing the bending of the second belt.

9. The adjustable holding device according to claim 8, characterized in that, The second protrusion is formed in multiple locations at different positions on the upper and lower end faces of the second folded-back portion in the width direction. A third protrusion is formed on the second vertical wall portion formed on the upper inner wall surface of the second belt insertion portion, which protrudes inward at a position opposite to the second protrusion formed on the upper end surface of the second folded portion. A fourth protrusion is formed on the second vertical wall portion formed on the lower inner wall surface of the second belt insertion portion, which protrudes inward at a position opposite to the second protrusion formed on the lower end surface of the second folded portion. The second folding member is configured to move forward and backward within the main body of the device while inverted.

10. The adjustable holding device according to claim 1 or 2, characterized in that, It has a second fastener, which has a third strap for length adjustment fixed at its base end and a locking claw formed at its top end. A latching member receiving portion and a locking protrusion are formed on the front end side of the opening on the main body of the device. The latching member receiving portion receives the second latching member in a detachable manner, and the locking protrusion is located inside the latching member receiving portion and engages with the locking claw of the second latching member.

11. The adjustable holding device according to claim 10, characterized in that, The base end of the second fastener has a third strap insertion portion and a second opening portion. The third strap insertion portion is rectangular in shape, designed to allow the third strap to be inserted from the front end to the rear. The second opening portion communicates with the third strap insertion portion and is rectangular in shape, formed along a vertical direction orthogonal to the insertion direction of the third strap. The belt adjustment and holding device includes a third belt folding member, which has a third folding portion and a third gripping portion. The third folding portion is configured to wrap around the third belt rearward in the second opening and fold forward. The third gripping portion is formed at the front end of the third folding portion and is configured to protrude forward from the third belt insertion portion together with the folded third belt. The third belt folding member is plate-shaped and can move forward and backward within the second fastener. On the upper and lower inner wall surfaces of the third belt insertion portion, a third vertical wall portion is continuously formed along the belt width direction between the left and right side wall portions of the second fastener, rising in a stepped shape towards the inside from the second opening portion side. A third protrusion is formed on at least one of the upper and lower end faces of the third fold-back portion. The third protrusion moves to a position close to the front of the third upright portion in the forward position of the third belt fold-back member, causing the third belt to bend in a stepped shape between the third protrusion and the third upright portion. In the retracted position of the third belt fold-back member, the third protrusion moves into the second opening portion, thereby releasing the bending of the third belt.

12. The adjustable holding device according to claim 11, characterized in that, The third protrusion is formed in multiple positions at different locations on the upper and lower ends of the third folded-back portion in the width direction. A fifth protrusion is formed on the third vertical wall portion formed on the upper inner wall surface of the third belt insertion portion, protruding inward at a position opposite to the third protrusion formed on the upper end surface of the third folded portion. A sixth protrusion is formed on the third vertical wall portion formed on the lower inner wall surface of the third belt insertion portion, which protrudes inward at a position opposite to the third protrusion formed on the lower end surface of the third folded portion. The third folding member is configured to move forward and backward within the second fastener while in an upside-down inverted state.

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