JP2588276Y2 - Plastic buckle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called side release type buckle comprising a male tool and a female tool having a plate portion to which a belt or the like can be attached, and more specifically, a female tool constituting the buckle. Is a cylindrical case and an engaging / disengaging member having a pair of elastic legs that are housed and assembled in the cylindrical case, and are provided on the elastic legs of the engaging / disengaging member and operate the cylindrical case. The present invention relates to a plastic buckle capable of releasing an engaging state between a hook-shaped portion of a male tool and a hook-shaped locking portion of a female tool, which are engaged in a cylindrical case, by pressing an operation projecting piece protruding from a window.

[0002]

2. Description of the Related Art In a conventional side release type buckle, a male tool and a female tool are often integrally formed into two parts by integral molding. For example, a buckle shown in FIGS. 8 and 9 is a typical example. It is something. That is, the female tool includes a flat cylindrical body 101, and a male tool having a pair of engaging rods 102, 102 inserted into the female tool in a compressed state. Symmetrical notched window hole 10
3 and 103 are provided, an edge 104 of the window hole 103 is a locking edge, a mounting slit 105 such as a belt is provided, and a guide groove 107 of a male guide rod 106 is provided on the inner wall surface of the cylindrical body 101. . The male member is a pair of engaging rods 10.
2 and 102 are provided on the same plane so as to sandwich the guide rod 106, and these rods 102 and 106 are integrally connected by a knob frame 108. The rotation connecting plate 109 is disposed via an oblique slit. And engaging rods 102, 10
2 has a hook 111 on the outside on the opposite side, and the jaw 111a on the base side of the hook 111 is configured to be locked to the edge 104 of the window hole 103. Assembling of the male tool and the female tool in this buckle is performed using the engaging rod 1 of the male tool.
02 is inserted into the female tool by elastically deforming the engaging rod 102 by pressing it into the cylindrical body 101 of the female tool slightly inwardly, and the male tool is inserted through the window 103 of the female tool. The hook 111 is protruded outward, and the jaw 1 of the hook 111
This is performed by locking 11 a to the edge 104 of the window hole 103. Thus, the release of the locked state between the male tool and the female tool locked in this way can be performed as shown in FIG.
1 with one hand and the male
The hook 111 is pushed into the inside of the cylindrical body 101 so as to be picked, and the jaw 111 a of the hook 111 is inserted into the edge 10 of the window hole 103.
It is done by releasing from 4.

However, the above-mentioned conventional buckle requires further improvement in the following points due to its structure.
First, when this type of buckle is made of plastic (usually made of plastic from the viewpoint of required elastic deformation characteristics and molding cost), it is wound around a male tool and a female tool, respectively. When tension is applied to the belt, the male tool and the female tool are each pulled toward the winding side of the belt, so that the jaws 111a of the hooks 111 of the male tool are sufficiently formed on the edge 104 of the window hole 103 of the female tool. In a state in which the male member engages with the female member, and the engaging rod 102 of the male member protrudes the hook portion 111 outward from the window hole 103 of the female member and does not return elastically. The tool is locked, and as a result, the engaging rod 102 of the male tool is liable to undergo plastic deformation inward with time,
After the plastic deformation, the elasticity of the male tool directed to the outside of the engaging rod 102 is lost, so that it is difficult to create a locked state between the male tool and the female tool. Second, it is necessary to increase the thickness of the engaging rod 102 to increase the strength of the engaging rod 102 in order to make such plastic deformation less likely to occur, which makes this type of buckle thin. Was hindered.
Third, release of the locked state between the locked male tool and female tool,
An engaging rod 1 of a male tool that grips the cylindrical body 101 of the female tool with one hand and projects outward from the window 103 of the female tool with the other hand.
02 is pushed into the inside of the cylinder 101 so as to be picked up, and the jaw 111a of the hook 111 is released from the edge 104 of the window hole 103, so that when the hook 111 is pushed in, the finger is pushed. Hooked on the edge of window hole 103 of female tool, hook 1
It was difficult to slide the male tool outward from the female tool while pushing in 11. Therefore, in order to release the locked state between the male tool and the female tool, use a hand that pushes the hook of the male tool and another hand with the belt connected to either the male tool or the female tool. It is necessary to pull and apply tension so that the male tool and the female tool are separated from each other, and it is difficult to release the locked state with one hand.

In order to solve the problems of the conventional buckle, a plastic buckle shown in FIGS. 10 and 11 has been proposed before the present applicant. The buckle is integrally extended from a tubular case 210 having a rectangular cross section having opposing operation windows 213 on opposing side walls, and a plate portion 221 to which a belt C or the like is attached, and extends from this plate portion. A female tool A 'comprising a pair of elastic members 223 having a pair of elastic leg pieces 223 which are provided and accommodated and assembled in the cylindrical case 210; a plate 230 to which a belt C or the like is attached; Extending from 230,
In addition, a pair of engaging members which have hook-shaped portions 233 facing each other at their distal end portions and which are slidably contacted with the side wall 212 of the cylindrical case 210 where the operation window 213 is provided and which can be inserted into and removed from the cylindrical case. A male tool B 'including stop pieces 232 and 232, and a tip of the elastic leg piece 223 of the engagement / disengagement member 220 faces the inner side wall of the cylindrical case 210 and has a hook of the male tool B'. A hook-shaped engaging portion 225 that engages with the cylindrical portion 233 in the cylindrical case 210 is provided, and the elastic leg 223 protrudes outward from the operation window 213 of the cylindrical case 210. The buckle has a structure in which the operation protrusion 227 is provided, and by adopting this structure,
The locking piece 232 of the male tool B 'is the cylindrical case 210 of the female tool A'.
Is inserted into the cylindrical case 210 along the inner side wall of the female tool A ', and the hook-shaped part of the female tool A' is brought into contact with the hook-shaped locking portion 225 of the engaging / disengaging member 220. Stop part 225 and hook part 2
Since the hook 33 is engaged with the female tool A ', the male tool B' is engaged with the locking of the male tool B 'and the female tool A' as compared with the case where the hook is provided only on the male tool B '. Alternatively, the locking portion of the female tool A 'is less likely to be locked incompletely, and the locking portion caused by the incomplete locking state is prevented from being plastically deformed over time, so that locking can be reliably performed for a long period of time. The state can be maintained, and therefore, it is not necessary to increase the thickness of the locking pieces 232 of the male tool B 'and the elastic leg pieces 223 of the female tool A', so that a thin buckle can be obtained. Further, by merely pushing the operation protrusion 227 protruding from the operation window 213 of the cylindrical case 210 of the female tool A ′ into the cylindrical case 210, the tip is inserted into the inner wall of the cylindrical case 210 of the female tool A ′. Oriented hook-shaped locking part 225
From the hooks 233 facing each other of the male tool B ',
Hook-shaped locking portion 225 of female tool A 'and hook-shaped portion 233 of male tool B'
Can be released with one hand, so that the locked state between the male tool B 'and the female tool A' can be easily released with one hand, thereby correcting the inconvenience of the conventional plastic buckle. Is planned.

[0005]

However, in the plastic buckle proposed by the above-mentioned applicant, the engagement between the male tool B 'and the female tool A' is released by the cylinder of the female tool A '. By pushing the operation protruding piece 227 of the engaging / disengaging member 220 protruding from the operation window 213 of the cylindrical case 210 into the inside of the cylindrical case 210, the hook-shaped locking portion 225 of the female tool A 'is fixed to the male tool B'. When the force is applied to the buckle in a direction to separate the male tool B ′ and the female tool A ′, the engagement is released, and the female tool is released. The male tool B 'can be immediately pulled out from the inside of the female tool A'. However, if such a force is not applied to the buckle, the male tool B 'can be pulled out of the female tool A' even if the engagement state is released. Since the tool B 'does not come out immediately, separate the male tool B' from the female tool A ' It is necessary to perform an operation of issuing.

Therefore, in this invention, the engagement state of the plastic buckle proposed by the applicant is released, the male tool B 'is pulled out from the female tool A' and the male tool B is inserted into the female tool A '. The purpose of this is to make the insertion operation of '' easier.

[0007]

According to the present invention, in order to achieve the above object, a plastic buckle is combined with a cylindrical cross-section case 10 having a pair of operation windows 13 on opposite side walls 12a. And a pair of elastic leg pieces 23, 23 integrally extended from a plate portion 21 to which the belt B or the like is attached, and extended from the plate portion 21 and housed and assembled in the cylindrical case 10. Engagement member 2
0, a plate portion 30 to which the belt C and the like are attached, and a hook-shaped portion 33 extending from the plate portion 30 and facing each other at the tip portion. Side wall 12a provided with operation window 13
And a male member B comprising a pair of locking pieces 32, 32 which are slidably contacted with and inserted into the cylindrical case 10 in a removable manner. A hook-shaped engaging portion 25 facing the inner side wall of the cylindrical case 10 and engaging with the hook-shaped portion 33 of the male tool B in the cylindrical case 10 is provided. An operation protruding piece 27 is provided to protrude from the operation window 13 of the cylindrical case 10 to the outside of the cylindrical case 10.
From the base side of the pair of locking pieces 32, 32, the locking pieces 3
The elastic piece 34 for accommodating the hook-shaped locking portion 25 of the female tool A is extended between the front end of the locking piece 32 and the side thereof.

[0008]

According to the plastic buckle according to the present invention, first, the locking piece 32 of the male tool B is moved to the female tool A by the above configuration.
After the hook 33 is brought into contact with the hook-shaped locking portion 25 of the engaging / disengaging member 20 of the female tool A after being inserted into the cylindrical case 10 along the inner side wall of the cylindrical tool 10, The elastic leg piece 23 of the engaging / disengaging member 20 is bent inward and sent to the base side of the locking piece 32, and then the hook-shaped locking portion 25 of the female tool A is engaged with the male tool B by the elastic piece 34. It operates so as to be guided toward the inside of the stop piece 32, whereby the hook-shaped locking portion 25 and the hook-shaped portion 33 of the female tool A are engaged with each other to lock the female tool A and the male tool B. Next, the operation protruding piece 27 of the engaging / disengaging member 20 protruding from the operation window 13 of the cylindrical case 10 of the female tool A is attached to the cylindrical case 1.
0, the hook-shaped locking portion 25 whose tip is directed to the inner side wall of the cylindrical case 10 of the female tool A is disengaged from the hook-shaped portions 33 of the male tool B facing each other. Locking part 2
The locked state between the hook 5 and the hook 33 of the male tool B is released. Further, from the base side of the pair of locking pieces 32, 32 of the male tool B, the hook-shaped locking portions 25 of the female tool A are interposed between the locking pieces 32.
The elastic piece 34 for accommodating therein is extended with the side part facing the tip of the locking piece 32, so that the female bent toward the inside of the cylindrical case 10 with the pushing of the operation protruding piece 27. The tip of the hook-shaped locking portion 25 of the tool A comes into contact with the side portion of the elastic piece 34 to cause the elastic piece 34 to bend, while the elastic piece 34 once bends and then repels the bending. The female tool A is pressed to release the hook-shaped locking portion 25 of the female tool A at this time. Accordingly, the male tool B released from the locked state with the female tool A is smoothly pushed out of the female tool A by the action of the elastic piece 34.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A typical embodiment of a plastic buckle according to the present invention will be described below with reference to FIGS.

FIG. 1 is a perspective view of a buckle according to the first embodiment. FIGS. 2 to 7 show the cylindrical case 1 of the female tool A for easy understanding of the process of engaging and disengaging the buckle.
FIG. 2 is a plan view showing a cross-section of FIG.

As shown in FIG. 1, the buckle according to the first embodiment comprises a female tool A comprising a cylindrical case 10 and an engaging / disengaging member 20, and a male tool B. Typically, these are made of plastic by injection molding from the viewpoint of required elastic deformation or molding cost.

The cylindrical case 10 has an elongated opening 11 and a pair of operation windows 13 at a position approximately in the middle of the side wall 12a opposed to each other, and has a rectangular cross section. This is the case. The top wall and the bottom wall of the cylindrical case 10 are flat surfaces, and the side wall 12a is
It is configured to have an inclined surface that is gradually inclined inward toward the openings 11 on both sides of the cylindrical case 10 from the edge.

The engagement / disengagement member 20 includes a plate 21 having a slit 22 through which a belt C or the like can be inserted, and a pair of members extending integrally from both sides of the plate 21 in the same direction. The elastic leg 23 includes a projection 24 provided outside the elastic leg 23 and extending from the plate portion 21 in the direction in which the elastic leg 23 extends. This elastic leg piece 23
A base leg 26 extending from the plate 21 so as to protrude slightly outside the width of the plate 21;
And an operation protrusion 27 protruding further to the side than the base leg 26, and a step surface 28 is formed between the base leg 26 and the operation protrusion 27. I have. Further, following the operation projection 27, the operation projection 27
The cylindrical case 10 is extended from the inside of the cylindrical case 10 toward the opening 11 side of the cylindrical case 10 and the front end is rounded.
5a, and the engaging / disengaging member 20 is
A hook-shaped engaging portion 25 is provided on the inner side wall 12b of the cylindrical case 10 so as to face the protruding end 25b in a state where the protruding end 25b is accommodated. A locking jaw edge 25c is formed inward from the protruding end 25b. . The dimension between the distal ends of the operation protruding pieces 27 of the pair of elastic leg pieces 23 is larger than the dimension between the inner side walls 12b of the cylindrical case 10;
The operation protruding piece 27 can protrude outward from the operation window 13 of the cylindrical case 10 when the engaging / disengaging member 20 is inserted into the operation case 13. Also, from a substantially middle position between the pair of elastic leg pieces 23, the engaging / disengaging member 20 is moved in one opening 11 of the cylindrical case 10 toward the extending direction of the elastic leg pieces 23. When inserted, stored and assembled, the other opening 11
A straightening rod 29 having a length reaching the vicinity of the opening edge of the cylindrical case 10 and having a thickness substantially equal to a dimension between the inner surface of the top wall or the inner surface of the bottom wall of the cylindrical case 10 is extended. The straightening rod 29 is used to keep the dimension between the inner surface of the top wall and the inner surface of the bottom wall of the cylindrical case 10 uniform, and to allow the locking piece 32 of the male tool B described later to be freely inserted and removed in the cylindrical case 10. It works. That is, as is well known, a box-shaped plastic molded product having a wide surface is likely to be deformed such as a sled. For this reason, depending on the molding conditions, the cylindrical case 10
The inner surface of the top wall and the inner surface of the bottom wall of the male case B are warped toward the inside of the cylindrical case 10, so that the dimension between the inner surface of the top wall and the inner surface of the bottom wall of the cylindrical case is separately locked. Piece 32
Disadvantageously, it is difficult to insert the male member B into the cylindrical case 10 or it is difficult to pull out the male member B once stored in the cylindrical case 10 from the cylindrical case 10. Occurs. Here, the straightening rod 29 is extended from substantially the middle position of the pair of elastic leg pieces 23 of the female tool A as described above, and the inner upper surface and the inner bottom surface of the cylindrical case 10 are Since the support is more supported, the dimension between the inner surface of the top wall or the inner surface of the bottom wall of the cylindrical case 10 can be made close to the set size. B can be freely inserted and removed. Further, since the rod-shaped correction rod 29 is not easily deformed and its thickness dimension can be maintained with high precision, the dimension between the inner upper surface or the inner bottom surface of the cylindrical case 10 is slightly smaller than the required dimension. In addition, the dimensions of the cylindrical case 10 can be corrected by inserting the correction rod 29 into the cylindrical case 10 and can be adjusted to the required dimensions with high accuracy.

As shown in FIG. 1, the engaging / disengaging member 20 is moved from the elastic leg piece 23 side to the opening 11 of the cylindrical case 10.
The two elastic leg pieces 23 are inserted into the cylindrical case 10 while being bent inward, and until the operation projection 27 of the engagement / disengagement member 20 faces outward from the operation window 13 of the cylindrical case 10. When the engaging / disengaging member 20 is moved within the cylindrical case 10,
Since the two elastic leg pieces 23 that have been bent inward try to return by projecting the operation projection 27 from the operation window 13, the operation projection 27 can be projected outward from the operation window 13. The step surface 28 of the engaging / disengaging member 20 is
3 can be hooked on the edge of the window. Therefore, the engagement / disengagement member 20 can be fixed in the cylindrical case 10 by protruding only the plate portion 21 from the other opening 11 of the cylindrical case 10.

On the other hand, the male tool B has a plate portion 30 having a slit 31 through which a belt or the like can be inserted, and extends from both sides of the plate portion 30 in a direction orthogonal to the slit 31 in the same direction. A pair of locking pieces 32, 32 are provided. The locking piece 32 has a hook-shaped portion 33 whose tip is a rounded edge 33a and faces the protruding end 33b, and a locking jaw edge 33c is formed outward from the protruding end 33b.

The pair of locking pieces 3 of the male tool B
An elastic piece 34 for accommodating the hook-shaped locking portion 25 of the female tool A between the locking piece 32 and the locking piece 32 from the base side of the locking pieces 32 faces the tip of the locking piece 32, respectively. And it is extended so that it may be gradually separated from the locking piece 32. A disc-shaped bulging portion 34a is provided at a tip end of the elastic piece 34. When the male tool B is extracted from the mold, a part of the elastic piece 34 is formed in the mold. In order to prevent the elastic piece 34 from protruding from the inside of the mold, the projecting pin is brought into contact with the elastic piece 34 so that the elastic piece 34 does not remain.

The outer edges of the pair of locking pieces 32, 32 are slidable on the side wall 12b of the cylindrical case 10 where the operation window 13 is provided when the insertion pieces are inserted into the cylindrical case 10. 33d. The pair of elastic pieces 3
A recess 35 is provided between the female tool A and the female tool A for accommodating the distal end of the correction rod 29 of the female tool A when the male tool B is stored in the female tool A.

In this embodiment, the attachment of the belt C to the plate portion 21 of the engaging / disengaging member 20 of the female tool A and the attachment of the belt C to the plate portion 30 of the male tool B are performed by slits 22, The belt C is wound around and connected to the base 31, but one end of the belt C may be integrally mounted on the plate 21 and the plate 30. Such attachment is performed by forming the engaging / disengaging member 20 of the female tool A and the two mold cavities for molding the male tool B in portions corresponding to the plate portions 21 and 30 with the raised portions of the other molds. Preferably, a pair of raised portions is provided, and one end of the belt C is sandwiched between the raised portions to position the belt C while filling the cavity with a plastic molding material. Thus, the belt C is connected to the plate portions 21 and 30.
In the case of molding in a state of being embedded in the inside, since the end face of the prepared belt C is in the plate portions 21 and 30, it is not necessary to particularly treat this end face from the viewpoint of appearance. Further, the end face is not frayed.

Next, the buckle engagement / disengagement process will be described with reference to FIGS. In locking the buckle, first, as shown in FIG. 2, the male member B is moved from the side where the locking piece 32 is extended to the disengaging member 2 of the female member A.
When the male tool B is inserted into the opening 11 of the cylindrical case 10 on the projecting side on the side of the elastic leg piece 23, the male member B moves the sliding contact edge 33d of the locking piece 32 into the cylindrical case 10 as shown in FIG. 1
The outer edge 33a of the hook 33 is brought into contact with the outer edge 25a of the hook 25 of the female tool A while sliding and guiding the inner wall 12b. When the male member B is further pushed into the cylindrical case 10 from this state, the locking pieces 32 of the male member B are held by the cylindrical case 10 so as not to expand outward, and therefore, shown in FIG. Thus, the hook 33 of the male tool B causes the elastic leg pieces 23 of the female tool A to bend inward. In this state, the round edge 25a of the female tool A is brought into contact with the elastic piece 34 of the male tool B. As described above, this elastic piece 34 faces the distal end of the locking piece 32, and Since the hook-shaped locking portion 25 of the female tool A is extended from the base side of the locking piece 32 gradually away from the locking piece 32, the hook-shaped locking portion 25 of the male tool B is formed by the side edge of the elastic piece 34. It is guided to the part 33 side and elastically returns in a state where it is pressed tightly inside the hook-shaped part 33 of the male tool B. Here, the tip of the elastic leg piece 23 of the female tool A faces the inner side wall 12b of the cylindrical case 10 and has a hook-like portion which engages with the hook-shaped portion 33 of the male tool B in the cylindrical case 10. Since the locking portion 25 is provided, as shown in FIG. 5, the hook-shaped locking portion 25 of the elastic leg piece 23 of the female tool A is connected to the locking jaw edge 25c of the hook-shaped portion 33 of the male tool B. The male tool B and the female tool A are engaged with each other in a state of being in contact with the locking jaw edge 33c, so that the male tool B and the female tool A are locked.

As described above, the hook-shaped engaging portion 25 of the female tool A is guided by the elastic piece 34 and securely engages with the hook-shaped portion 33 of the male tool B. The hook-shaped portion 33 of the male tool B and the hook-shaped locking portion 25 of the female tool A are locked without properly engaging each other, and the hook-shaped locking portion 25 of the female tool A is plastically deformed with time. The situation that the elastic force is lost is sufficiently prevented.

Next, to release the locked state of the buckle, the operation projection 27 of the elastic leg 23 of the female tool A projecting outward from the operation window 13 of the cylindrical case 10 is pressed as shown in FIG. It is done by doing. That is, when the operation protruding piece 27 of the engaging / disengaging member 20 protruding from the operation window 13 of the cylindrical case 10 of the female tool A is pushed into the inside of the cylindrical case 10, the female tool integrated with the operation protruding piece 27 is formed. The hook-shaped engaging portion 25 of A is also pushed into the inside of the cylindrical case 10, and as a result, the hooked state of the hook-shaped engaging portion 25 of the female tool A and the hook-shaped portion 33 of the male tool B is released. The female tool A bent toward the inside of the cylindrical case 10 with the pushing of the operation projection 27.
The tip of the hook-shaped locking portion 25 abuts against the side of the elastic piece 34 to cause the elastic piece 34 to bend. On the other hand, after the elastic piece 34 has once bent, it repels the bent. It operates to return to the original position, and at this time, it presses so as to release the hook-shaped locking portion 25 of the female tool A. Therefore, as shown in FIG. 7, the male tool B released from the locked state with the female tool A is smoothly pushed out of the female tool A by the action of the elastic piece 34.

[0022]

In the plastic buckle according to the present invention, the hook-like locking portion 25 of the female tool A is provided between the pair of locking pieces 32 of the male tool B and the locking pieces 32 from the base side thereof. An elastic piece 34 for receiving the male tool B is provided in the cylindrical case 10 of the female tool A so as to extend with the side part facing the tip of the locking piece 32.
Is inserted, the hook-shaped locking portion 25 of the female tool A can be guided toward the inside of the locking piece 32 of the male tool B by the elastic piece 34. The locking piece 32 of the male tool B inserted into the cylindrical case 10 of the female tool A can be locked easily and reliably. Further, the distal end of the hook-shaped locking portion 25 of the female tool A bent toward the inside of the cylindrical case 10 as the operation protruding piece 27 of the female tool A is pushed into contact with the side of the elastic piece 23. The elastic piece 23 is bent so as to come into contact with the elastic member 23. On the other hand, after the elastic piece 23 is bent once, the elastic piece 23 operates to return to the original position by repelling the bending and at this time, the female tool A Is pressed so as to protrude, and the male tool B, which has been released from the locked state with the female tool A, is smoothly pushed out from the inside of the female tool A. Release of the engagement state with the male tool B, extraction of the male tool B from the female tool A, and insertion of the male tool B into the female tool A can be performed more easily.

[Brief description of the drawings]

FIG. 1 is a perspective view of a buckle according to an embodiment.

FIG. 2 is a plan view showing a process of engaging and disengaging a buckle according to the embodiment.

FIG. 3 is a plan view showing a process of engaging and disengaging a buckle according to the embodiment.

FIG. 4 is a plan view showing a process of engaging and disengaging a buckle according to the embodiment.

FIG. 5 is a plan view showing a process of engaging and disengaging a buckle according to the embodiment.

FIG. 6 is a plan view showing a process of engaging and disengaging a buckle according to the embodiment.

FIG. 7 is a plan view showing the process of engaging and disengaging the buckle according to the embodiment.

FIG. 8 is a plan view of a conventional buckle.

FIG. 9 is a plan view of a conventional buckle.

FIG. 10 is a perspective view of a buckle to be compared.

FIG. 11 is a plan configuration diagram of a buckle to be compared.

[Explanation of symbols]

 Reference Signs List A Female tool B Male tool C Belt 10 Cylindrical case 11 Opening 12a Side wall 12b Inner wall 13 Operation window 20 Disengagement member 21 Plate portion 22 Slit 23 Elastic leg piece 24 Projection 25 Hook-shaped locking portion 25a Round edge 25b Protruding end 25c Locking jaw edge 26 Base leg piece 27 Operation protruding piece 28 Step surface 29 Correction rod 30 Plate portion 31 Slit 32 Locking piece 33 Hook-shaped portion 33a R edge 33b Protrusion 33c Locking jaw edge 33d Sliding contact edge 34 Elastic piece 34a Inflation Outer part 35 Recess

Claims (1)

(57) [Scope of request for utility model registration] 1. A cylindrical case having a rectangular cross section having a pair of operation windows on opposing side walls, and a unit integrally extended from a plate portion to which a belt or the like is attached, and housed in the cylindrical case. A female tool comprising a disengagement member having a pair of elastic leg pieces to be assembled, a plate portion to which a belt or the like is attached, and a hook-shaped portion extending from the plate portion and facing each other at the tip end. A male member comprising a pair of locking pieces which are slidably in contact with a side wall of the cylindrical case where the operation window is provided and which are removably inserted into the cylindrical case. At the tip of the elastic leg piece of the member, a hook-shaped engaging portion facing the inner wall of the cylindrical case and engaging with the hook-shaped portion of the male tool in the cylindrical case is provided. The leg piece is outside the cylindrical case through the operation window of the cylindrical case. An operation protruding piece is provided to project from the base side of the pair of locking pieces of the male tool, and an elastic piece for accommodating the hook-shaped locking portion of the female tool between the locking piece and the locking piece. A plastic buckle extending side-to-side with a tip of a stop piece.