JP3133291B2 - 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 buckle of a side release type, a male tool and a female tool are often integrally formed into two parts, for example, a buckle shown in FIG. 9 is a typical example. is there. That is, the 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, and the female tool has symmetrical split windows on both sides of the cylindrical body 101. Holes 103, 10
3 is provided, the edge 104 of the window hole 103 is used as a locking edge,
It has a mounting slit 105 for a belt or the like, and a guide groove 107 for a male guide rod 106 provided on the inner wall surface of the cylindrical body 101. The male member is a pair of engaging rods 102, 102.
Are provided on the same plane so as to sandwich the guide rod 106, and the rods 102 and 106 are integrally connected by a knob frame 108, and the frame 108
A winding connection plate 109 such as a belt is disposed via an oblique slit 110. The engaging rods 102, 102 have a hook 111 on the outside on the opposite side, and the jaw 111a on the base side of the hook 111 is connected to the edge 1 of the window hole 103.
04. Assembling of the male tool and the female tool in this buckle is performed using the engaging rod 102 of the male tool.
The engagement rod 102 is elastically deformed and inserted into the female tool by pushing the female tool into the cylindrical body 101 of the female tool so as to be slightly narrowed inward, and the male tool is hooked through the window 103 of the female tool. Part 111 is projected outward, and the jaw 111 of the hook 111
This is performed by locking a at 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 is performed as shown in FIG.
Is gripped with one hand, and the other hand is pressed into the inside of the cylindrical body 101 so as to grip the hook 111 of the engaging rod 102 of the male tool, and the jaw 111 a of the hook 111 is fitted to the edge of the window hole 103. 104
It is done by releasing more.

[0003]

However, the above-mentioned conventional buckle requires further improvement in the following points due to its structure. First, when this kind of buckle is made of plastic (usually made of plastic from the viewpoint of required elastic deformation characteristics and molding cost).
If tension is applied to the belts wound on the male tool and the female tool, respectively, the male tool and the female tool are pulled toward the winding side of the belt, respectively.
Is not sufficiently engaged with the edge 104 of the window 103 of the female tool, that is, the engaging rod 102 of the male tool is
The hook 111 is protruded outward from the female tool so that the male tool and the female tool are locked inward without elastically returning to engage the male tool and the female tool. This causes plastic deformation easily, and after the plastic deformation, the elasticity directed to the outside of the engaging rod 102 of the male tool 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 is performed by grasping the cylindrical body 101 of the female tool with one hand and using the other hand to move outward from the window 103 of the female tool. The protruding hook 111 of the engaging rod 102 of the male tool is pushed into the inside of the cylindrical body 101 so as to be picked, and the jaw 111 of the hook 111 is inserted.
a is released from the edge 104 of the window hole 103, so that when the hook 111 is pushed in, the finger gets caught on the edge of the window 103 of the female tool, and the male tool is pushed out of the female tool while pushing the hook 111. It was difficult to move the slide. 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.

Accordingly, the present invention solves the above-mentioned problems of the conventional buckle, that is, the locking of the male tool or the female tool related to the locking of the male tool and the female tool is plastically deformed with time. It is another object of the present invention to provide a thin plastic buckle that can easily release a locked state between a male tool and a female tool with one hand.

[0005]

In order to achieve the above object, according to the present invention, a plastic buckle according to claim 1 is provided with a rectangular cross section having a pair of operation windows on opposing side walls. A disengagement member having a cylindrical case and a pair of elastic leg pieces integrally extended from a plate portion to which a belt or the like is attached and extending from the plate portion and housed and assembled in the cylindrical case. And a plate part to which a belt or the like is attached, and which is extended from this plate part,
And while having a hook-shaped part facing each other at the tip,
A male member comprising a pair of locking pieces which are slidably contacted with the side wall of the cylindrical case where the operation window is provided and which are removably inserted into and removed from the cylindrical case; The tip of the leg piece faces the inner wall of the cylindrical case,
In addition, the male member is brought into contact with the hook-like portion of the locking piece of the male member as the male member is inserted into the cylindrical case, and the male member is elastically returned by the elastic leg piece once bent inward. A hook-shaped engaging portion that can be engaged with the hook-shaped portion of the tool in the cylindrical case; and the elastic leg piece is provided with the operating window when the disengagement member is stored in the cylindrical case. An operation protruding piece for projecting outward from the cylindrical case to elastically engage with the cylindrical case and assembling the engaging / disengaging member to the cylindrical case is provided. In the plastic buckle according to the second aspect, the plastic buckle according to the first aspect has an arcuate shape between the pair of locking pieces of the male tool toward the extending direction of the locking pieces from the plate portion of the male tool. The tongue protruding from the tongue is provided, and the arcuate edge of the tongue is brought into contact with the tip of the elastic leg of the engaging / disengaging member of the female tool bent inward. Further, in the plastic buckle according to the third aspect, a projection protruding outward from a plate portion of the engagement / disengagement member is provided on the outside of the elastic leg of the engagement / disengagement member of the plastic buckle according to the first or second aspect. And the insertion / removal member is inserted into one opening of the cylindrical case through the other opening of the cylindrical case with the plate-side of the engagement / disengagement member first. A configuration is provided in which a protruding portion that catches on the protrusion is provided.

[0006]

In the plastic buckle according to the present invention, a cylindrical case having a rectangular cross section having a pair of operation windows on opposing side walls and a plate portion to which a belt or the like is attached are integrally extended, and A female tool consisting of an engaging / disengaging member having a pair of elastic legs, which is extended from the plate portion and housed in the tubular case and assembled therewith; a plate portion to which a belt or the like is attached; A pair of hooks extending and having hook-shaped portions at their distal ends facing each other, and slidably in contact with a side wall of the cylindrical case where the operation window is provided and removably inserted into the cylindrical case. A male tool consisting of a stop piece, the tip of the elastic leg of the engaging and disengaging member facing the inner wall of the cylindrical case, and with the insertion of the male tool into the cylindrical case. In the locking piece of the male tool A hook-shaped engaging portion that can be hooked in the tubular case with the hook-shaped portion of the male tool by the elastic return of the elastic leg piece that has once been bent inward by contacting the shaped portion; When the engaging and disengaging member is housed in the cylindrical case, the elastic leg piece protrudes outward from the operating window through the operating window to elastically engage with the cylindrical case, and engages with the cylindrical case. Since the operation projection piece for assembling the removal member is provided, the locking piece of the male tool is inserted into the cylindrical case along the inner wall of the cylindrical case of the female tool, and the hook of the engagement / disengagement member of the female tool is provided. The hook-shaped part of the male tool is brought into contact with the hook-shaped locking part, and the elastic leg of the female tool is once bent inward. And the hook-shaped locking portion of the female tool are engaged. Further, by pushing the operation protrusion of the engaging / disengaging member protruding from the operation window of the cylindrical case of the female tool into the cylindrical case, a hook-shaped engaging member whose tip is directed to the inner wall of the cylindrical case of the female tool. The stop portion is removed from the mutually facing hook-shaped portions of the male tool, and the locked state of the hook-shaped locking portion of the female tool and the hook-shaped portion of the male tool is released. Further, in the invention according to claim 2, the tongue piece of the male tool is in contact with the tip of the elastic leg of the female tool which is bent inward when the male tool is inserted into the cylindrical case. Thereby, the elastic leg piece of the female tool bent inward is guided to the inside of the locking piece of the female tool, and the hook portion of the female tool and the hook portion of the male tool are securely engaged with each other. Then, the male tool is locked to the female tool. In addition, the operation protrusion of the engaging / disengaging member protruding from the operation window of the cylindrical case of the female tool contacts the tip of the elastic leg piece of the female tool which is bent inward by pushing the operation protrusion into the cylindrical case. The direction in which the male tool is pulled out from the cylindrical case of the female tool in a state where the hook-shaped locking portion of the female tool and the hook-shaped portion of the male tool are released by the arc-shaped edge of the tongue piece of the male tool. , And the engaging state between the female tool and the male tool is smoothly released.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An 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 are plan views showing the cross section of the cylindrical case 10 so that the process of engaging and disengaging the buckle can be easily understood. FIG. 8 shows the configuration of the buckle according to the second embodiment so that it can be easily understood.
FIG. 2 is a plan view showing a cross section of the cylindrical case 10.

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 elongated openings 11 at both ends, and the side walls 1 opposed to each other.
This is a thin case having a pair of operation windows 13 at a substantially middle position of 2a and having a rectangular cross section. A protrusion 14 is provided at an edge of one of the openings 11 of the cylindrical case 10 on the side in contact with the side wall 12a, and protrudes inward of the cylindrical case 10. The engaging and disengaging member 20 is assembled into the cylindrical case 10 to be a female tool A.

The engagement / disengagement member 20 includes a plate portion 21 having a slit 22 through which a belt C or the like can be inserted, and a pair of extending members extending in the same direction from both side portions of the plate portion 21 integrally with the plate portion 21. It has an elastic leg piece 23 and a projection 24 provided outside the elastic leg piece 23 and outward from the plate portion 21. The elastic leg piece 23 extends from the plate portion 21 so as to protrude slightly outside the width of the plate portion 21, and is provided following the base leg piece 26. Operation protruding piece 2 protruding further to the side than 26
7, extending substantially parallel to the surface of the inner wall 12b of the cylindrical case 10 housed from the inside of the operation protruding piece 27 following the operation protruding piece 27; In a state where the engagement / disengagement member 20 is housed in the cylindrical case 10, the inner wall 12 of the cylindrical case 10
b is provided with a hook-shaped locking portion 25 for directing the protruding end 25b, and a locking jaw edge 25c is formed inward from the protruding end 25b.

As shown in FIG. 1, the engagement / disengagement member 20 is moved from the base side of the elastic leg piece 23 to the opening 11 on the side of the cylindrical case 10 where the protrusion 14 is not provided. Into the protrusion 2 of the engagement member 20
4 is hooked on the protruding portion 14 of the cylindrical case 10, and the engagement / disengagement member 20 is connected to the other opening 11 of the cylindrical case 10.
Further, only the plate portion 21 is protruded so that the cylindrical case 10
Will be fixed inside.

The male member B includes a plate portion 30 having a slit 31 through which a belt or the like can be inserted, and a plate portion 30 that is orthogonal to the slit 31 from both sides of the plate portion 30 in the same direction.
It consists of a pair of locking pieces 32, 32 that are further extended. 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. . Further, the side edge of the plate portion 21 on the side where the locking piece 32 is extended extends from a substantially middle position of the paired plate portions 21 toward the extending direction of the locking piece 32. A tongue piece 34 is provided that protrudes and narrows while gradually inclining toward the base side of the locking piece 32. Also,
The outer edge of the pair of locking pieces 32 is a sliding edge 33d that slides on the side wall 12b of the cylindrical case 10 where the operation window 13 is provided when inserted into the cylindrical case 10.

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 respectively. , 31 around the belt C,
Although the connection is performed, one end of the belt C may be integrally mounted on the plate portion 21 and the plate portion 30 so as to be embedded. Such attachment is performed by the plate portions 21 and 3 in the cavities of two molds for molding the disengagement member 20 of the female tool A and the male tool B.
In the portion corresponding to 0, raised portions that are mutually paired with the raised portions of other molds are provided, and one end of the belt C is sandwiched between the raised portions to position the belt C. It is preferable to fill the cavity with a plastic molding material. As described above, when the belt C is molded while being embedded in the plate portions 21 and 30, the end surface of the prepared belt C is located in the plate portions 21 and 30. There is no need to particularly treat the end face. Further, the end face is not frayed.

Next, the buckle engaging / disengaging 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.
The cylindrical case 1 on the projecting side of the elastic leg piece 23
When the male member B is inserted through the opening 11 of the cylindrical case 1 as shown in FIG.
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 being slid and guided by 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 comes into contact with the tongue piece 34 of the male tool B. As described above, the tongue piece 34 has an arc shape gradually inclined toward the locking piece 32 side. Therefore, the hook-shaped locking portion 25 of the female tool A is guided to the base side of the hook-shaped portion 33 of the male tool B by the edge of the tongue piece 34, and the hook-shaped portion 3 of the male tool B is formed.
3 The elastic return is performed in a state of being pressed tightly inside. 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 where the male tool B and the female tool A are in contact with the locking jaw edge 33c.

As described above, the hook-shaped engaging portion 25 of the female tool A is guided by the tongue piece 34 and securely engages with the hook-shaped portion 33 of the male tool B. Hook-shaped part 3 of male tool B
3 and the hook-shaped locking portion 25 of the female tool A are locked without being properly engaged with each other, and the elastic leg pieces 23 of the female tool A are plastically deformed with time and lose elastic force. It is sufficiently prevented.

Next, to release the locked state of the buckle, as shown in FIG. 6, the operation projection 27 of the elastic leg 23 of the female tool A protruding outward from the operation window 13 of the cylindrical case 10 is pressed. 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 hook-shaped locking portion 25 of the female tool A pushed into the inside of the cylindrical case 10 engages the round edge 25a with the male tool B.
At this time, since the force for pushing the male tool B into the cylindrical case 10 is not applied at this time, the edge of the tongue piece 34 projecting in an arc toward the center gradually. The hook-shaped locking portion 25 of the female tool A, which is pushed inward along the same direction, forcibly pushes the male tool B to the outside of the cylindrical case 10 by the length of the protrusion of the tongue piece 34 of the male tool B, and FIG. As shown, the locked state between the male tool B and the female tool A is released.

Next, in the buckle according to the second embodiment shown in FIG. 8, an edge of the tongue piece 34 of the male tool B toward the insertion direction of the male tool B is formed near the locking piece 32. Tongue piece 3
An elastic piece 34 'which is a continuation of the arc-shaped inclined edge of 4'
Are separated from the tongue piece 34, and extend from the tongue piece 34 with the front end toward the locking piece 32 side. This elastic piece 34 ′
In locking the male tool B and the female tool A, the male tool B is brought into contact with the rounded edge 25a of the hook-shaped locking portion 25 of the female tool A and is once pushed into the plate portion 30 side of the male tool B, and then resiliently. Then, the hook-shaped locking portion 25 of the female tool A is pressed into the hook-shaped portion 33 of the male tool B. Also,
In releasing the locked state, the pressing force of the hook-shaped locking portion 25 of the female tool A pushed inward is received while flexing itself into the plate portion 30 side of the male tool B, and the cylindrical case 10 of the male tool B is received. Make the extrusion from inside smoother. The configuration of the buckle other than the above description of the second embodiment is the same as that of the first embodiment, and the same components are denoted by the same reference numerals and description thereof will be omitted.

[0019]

In the plastic buckle according to the present invention, the engaging piece of the male tool is inserted into the cylindrical case along the inner wall of the cylindrical case of the female tool, and the hook of the engaging / disengaging member of the female tool is formed. After the hook-shaped part comes into contact with the hook-shaped locking part, the hook-shaped locking part of this female tool and the hook-shaped part are hooked and locked by the female tool. In comparison with the above, the situation where the locking part of the male tool or the female tool related to the locking of the male tool and the female tool is incompletely locked is less, By preventing plastic deformation, it is possible to keep the locked state reliably for a long period of time. In particular, since the tongue of the male tool guides the hook-shaped locking portion of the female tool and securely locks the hook-shaped locking portion of the female tool to the hook-shaped portion of the male tool, the above-described plastic deformation is sufficiently prevented. Therefore, it is not necessary to increase the thickness of the locking pieces of the male tool and the elastic leg pieces of the female tool, so that a thin buckle can be obtained.
Also, by simply pushing the operation projection of the engagement / disengagement member protruding from the operation window of the female tool cylindrical case into the cylindrical case, the hook-shaped engagement member whose tip is directed to the inner wall of the female tool cylindrical case. Since the stop is removed from the hooks of the male tool that face each other, the hook between the female tool and the hook of the male tool can be released.
The release of the locked state between the male tool and the female tool can be easily performed with one hand.

[Brief description of the drawings]

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

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

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

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

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

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

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

FIG. 8 is a plan view of a buckle according to a second embodiment.

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

FIG. 10 is a plan view of a conventional buckle.

[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 14 protruding wall 20 engaging / disengaging member 21 plate 22 slit 23 elastic leg piece 24 projection 25 hook-shaped locking section 25a 25b protruding end 25c locking jaw edge 26 base leg piece 27 operating protruding piece 30 plate portion 31 slit 32 locking piece 33 hook-shaped portion 33a are edge 33b protruding end 33c locking jaw edge 33d sliding contact edge 34 tongue piece 34 'elastic piece

Claims (3)

(57) [Claims] 1. A cylindrical case having a rectangular cross section having a pair of operation windows on opposing side walls, and a plate portion to which a belt or the like is attached, and integrally extended from the plate portion. And a female tool comprising a pair of elastic members having a pair of elastic legs that are housed and assembled in the cylindrical case, a plate portion to which a belt or the like is attached, and a tip portion extending from the plate portion and extending from the plate portion. A male tool comprising a pair of locking pieces which have hook-shaped portions facing each other, and which slide in contact with a side wall of the cylindrical case where the operation window is provided so as to be removably inserted into the cylindrical case. At the tip of the elastic leg piece of the engaging / disengaging member, faces the inner wall of the cylindrical case, and with the insertion of the male tool into the cylindrical case, the locking piece of the male tool Once in contact with the hook, it was bent inward once The elastic leg piece is provided with a hook-shaped engaging portion which can be hooked in the tubular case with the hook-shaped portion of the male tool by elastic return of the elastic leg piece, and the elastic leg piece has At the time of storage of the engagement / disengagement member, there is provided an operation projection that projects outward from the operation window to the outside of the cylindrical case, elastically engages with the cylindrical case, and assembles the engagement / disengagement member with the cylindrical case. Characterized plastic buckle. 2. A tongue protruding from a plate portion of the male tool in an arc shape toward a direction in which the locking piece extends, between the pair of locking pieces of the male tool, and an arc-shaped edge of the tongue piece. 2. The plastic buckle according to claim 1, wherein the buckle is configured to be in contact with the tip of the elastic leg of the engaging / disengaging member of the female tool bent inward. 3. An engaging and disengaging member having a projection protruding outward from a plate portion of the engaging and disengaging member on the outside of the elastic leg piece, and an opening of one of the cylindrical case and another of the cylindrical case. The projection part which is hooked on the said projection of this disengagement member by inserting the said disengagement member with the board part side of the said disengagement member first from an opening part is provided. 2. The plastic buckle according to 2.