JP6032895B2 - buckle - Google Patents

Description

  The present invention relates to a buckle that includes a male member and a female member into which a female member is inserted, and that releases a connection state with the male member by a release operation from the female member side. By making surface contact with the member, the operating force is unlikely to increase even if the position where the release portion of the female member is pressed with a finger is different, so that the operating force can be reduced as a whole.

Conventionally, there has been known a buckle in which a release arm is provided on a female member, and the connection state between the male member and the male member can be released by pushing the locking arm of the male member through the release arm. (Refer to the 4th column 39-55 line of the specification of patent document 2, and FIGS. 3-7).
A convex engagement portion that abuts against the locking arm is provided at the distal end portion of the above-described conventional release arm (see the fourth column 39 to 55 of the specification of Patent Document 2, see FIG. 4).

US Patent No. 7464448

However, in the above-described conventional buckle, the engaging portion located at the distal end portion of the release arm is in point contact or line contact with the outer surface of the locking arm. There was a problem that the operating force was likely to increase.
That is, in the above-described conventional buckle, when the position outside the engaging portion is accurately pushed, the operating force is minimized, and when the other position is pressed, the operating force tends to increase.

In addition, the conventional buckle has a problem in that abnormal noise tends to occur during the release operation because the engaging portion is separated from the outer surface of the locking arm and also makes point contact or line contact when contacting.
Accordingly, each invention described in each claim has been made in view of the problems of the conventional techniques described above, and the object thereof is as follows.
(Claim 1)
The object of the present invention is as follows.

According to the first aspect of the present invention, the male member and the female member are brought into surface contact at the time of release, and the male member and the female member are brought into surface contact at the time of release, thereby pointing the release portion of the female member. Since it is difficult for the operating force to increase even if the pressing position is different, it is possible to reduce the operating force as a whole .
In addition to this, the invention according to claim 1 makes it possible to reduce the occurrence of abnormal noise because the male member and the female member are brought into surface contact during release.
Further, in the first aspect of the present invention, since the support portion that is in surface contact with the outer side surface of the arm portion is provided on the inner side surface of the release portion, a part of the release portion is bent when pushed with a finger. The release operation can be reliably performed, and the rigidity of the release portion can be improved.
(Claim 2)
The second aspect of the invention has the following object in addition to the object of the first aspect of the invention.

The invention according to claim 2 can reduce frictional resistance at the time of release by making point contact between the male member and the female member when completely releasing, and can smoothly separate the male member and the female member. It is something that can be done.
(Claim 3)
The invention described in claim 3 has the following object in addition to the object of the invention described in claim 1 or claim 2.

According to the third aspect of the present invention, the force can be smoothly transmitted from the female member to the male member at the time of release.
(Claim 4)
The invention according to claim 4 has the following object in addition to the object of the invention according to any one of claims 1 to 3.

According to the fourth aspect of the present invention, the operation force at the time of release can be reduced .

Each invention described in each claim has been made to achieve each of the above-mentioned objects, and features of each invention will be described below using embodiments of the invention shown in the drawings. .
In addition, the code | symbol in parenthesis shows the code | symbol used in embodiment of invention, and does not limit the technical scope of this invention.
Also, the drawing numbers indicate the drawing numbers used in the embodiments of the invention and do not limit the technical scope of the present invention.
(Claim 1)
The invention described in claim 1 is characterized by the following points.

First, for example, as shown in FIG. 1 and FIGS. 13 to 15, a male member (30) and a female member (40) into which the male member (30) is inserted are configured, from the female member (40) side. A buckle (10) that releases the connected state with the male member (30) by the releasing operation.
Secondly, as shown in FIGS. 13 and 15, for example, as shown in FIGS. 13 and 15, the buckle (10) has an outer surface of the arm portion (52) of the male member (30) and a release portion ( 73) is in surface contact with the inner surface.
Third, a support portion (73a) that is in surface contact with the outer surface of the arm portion (52) is provided on the inner surface of the release portion (73).
Fourthly, as shown in FIGS. 7 to 12, for example, the female member (40) is formed in a cylindrical shape, and includes an upper wall (90) positioned on the upper side and a bottom wall (91) positioned on the lower side. It has a pair of side walls (92) located on the left and right sides, and has an insertion port (71) opened on the front side.
Fifth, in the middle of the pair of left and right side walls 92, there is a window portion (72) for exposing a part of the arm portion (52) inserted from the insertion port 71 .
Sixth, the release portion (73) has one end connected to the pair of left and right side walls (92), the other end is a free end, and toward the tip of the free end of the female main body (70). A direction of approaching the side wall (92) of the female main body (70) near the first free end inclined obliquely outward in the direction away from the side wall (92) and the tip of the first free end And a second free end that is bent into a bent shape.
Sixth, the support portion (73a) is located across the inner surface of the first free end portion and the inner surface of the second free end portion of the release portion (73), and faces the window portion (72). Each protrudes and abuts the arm part (52) exposed through the window part (72), and the inner side surface of the support part (73a) faces outward in a direction away from the side wall (92) of the female body (70). The inner surface of the inclined surface is in surface contact with the outer surface of the arm portion (52) exposed through the window portion (72).
(Claim 2)
The invention described in claim 2 is characterized by the following points in addition to the characteristics of the invention described in claim 1 described above.

That is, the outer surface of the arm portion (52) and the inner surface of the support portion (73a) of the release portion (73) are in point contact when fully released while being in surface contact.
(Claim 3)
The invention described in claim 3 is characterized by the following points in addition to the characteristics of the invention described in claim 1 or claim 2 described above.

That is, the buckle (10) has an outer surface of the arm portion (52) inclined in a tapered manner toward the front in the insertion direction, for example, as shown in FIGS. The inner surface of the support portion (73a) of (73) is pressed and released.
(Claim 4)
The invention described in claim 4 is characterized by the following points in addition to the features of the invention described in any one of claims 1-3.

That is, as shown in FIGS. 13 and 15 , for example, in the state where the male member (30) and the female member (40) are engaged , the surface contact is the outer surface of the arm portion (52) and the rear in the insertion direction. And reaches the distal end located on the inner side surface of the support portion (73a) of the release portion (73) in the same direction as the distal end.

Since this invention is comprised as mentioned above, there exists an effect as described below.
(Claim 1)
According to invention of Claim 1, there exist the following effects.
According to the first aspect of the present invention, when releasing, the male member and the female member are brought into surface contact with each other, so that the operating force is hardly increased even if the position where the release portion of the female member is pressed with a finger is different. Since the contact area is large, the operating force can be reduced.

In addition, according to the first aspect of the present invention, since the male member and the female member are brought into surface contact with each other at the time of release, the occurrence of abnormal noise can be reduced.
Furthermore, according to the first aspect of the present invention, the support portion having an inclination opposite to the release portion and in surface contact with the outer surface of the arm portion is provided on the inner side surface of the release portion. In this case, it is possible to prevent a part of the release part from being bent, to ensure that the release operation can be performed, and to improve the rigidity of the release part.
(Claim 2)
According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the following effect is obtained.

According to the second aspect of the present invention, when the release is completed, the male member and the female member are brought into point contact so that the frictional resistance at the time of release can be reduced, and the male member and the female member are smoothly separated. be able to.
(Claim 3)
According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the following effect is obtained.

According to the third aspect of the present invention, it is possible to smoothly transmit force from the female member to the male member at the time of release.
(Claim 4)
According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1-3, the following effect is provided.

According to the fourth aspect of the present invention, the operating force at the time of release can be reduced.

It is a disassembled perspective view of a buckle. It is a perspective view of the connection state of a buckle. It is a top view of a male member. It is a side view of a male member. It is a bottom view of a male member. It is sectional drawing which follows the AA line of FIG. It is a top view of a female member. It is a side view of a female member. It is a bottom view of a female member. It is a front view of a female member. It is sectional drawing which follows the BB line of FIG. It is sectional drawing which follows the CC line of FIG. It is a top view of the connection state of a buckle. It is a side view of the connection state of a buckle. It is a top view of the connection state of the buckle which attached the belt. It is sectional drawing which follows the DD line | wire of FIG. The 2nd Embodiment of this invention is shown, The figure is an exploded perspective view of a buckle. It is a top view of the state which attached and connected the belt to the buckle of FIG. It is sectional drawing which follows the EE line | wire of FIG.

(Buckle 10)
1 and 2, reference numeral 10 denotes a buckle, which is attached to a pair of belts 20 and 21 such as a bag or a case (not shown), and is used for detachably connecting the belts 20 and 21. ing.
In addition, although the buckle 10 for connecting the two belts 20 and 21 is illustrated, the invention is not limited to connecting the belts 20 and 21.

As shown in FIGS. 1 and 2, the buckle 10 is roughly composed of the following members.
The following (1) and (2) will be described later.
(1) Male member 30
(2) Female member 40
The member of the buckle 10 is not limited to the above (1) and (2).
(Male member 30)
As shown in FIGS. 1 and 2, the male member 30 can be attached to one of the two belts 20 and 21 and can be connected to a female member 40 described later.

The male member 30 is integrally formed of a thermoplastic synthetic resin such as POM having appropriate elasticity and rigidity. In addition, although POM was illustrated as a thermoplastic synthetic resin, it is not limited to this.
As shown in FIGS. 3 to 6, the male member 30 includes the following parts when roughly classified.
The following (1) and (2) will be described later.

(1) Insertion section 50
(2) Belt threading part 60
In addition, each part of the male member 30 is not limited to the above (1) and (2). For example, the belt passing part 60 may be omitted, and the insertion part 50 may be formed integrally with the end of the belt 20, attached to a connection object other than the belt 20, or formed integrally with the connection object. .
(Female member 40)
As shown in FIGS. 1 and 2, the female member 40 can be attached to the other belt 21 of the two belts 20 and 21 and can be connected to a male member 30 described later.

Similar to the male member 30, the female member 40 is integrally formed of a thermoplastic synthetic resin such as POM having appropriate elasticity and rigidity. In addition, although POM was illustrated as a thermoplastic synthetic resin, it is not limited to this.
As shown in FIGS. 7 to 12, the female member 40 includes the following parts when roughly classified.
The following (1) and (2) will be described later.

(1) Female body 70
(2) Belt fixing part 80
In addition, each part of the female member 40 is not limited to the above (1) and (2). For example, the belt fixing part 80 may be omitted, and the female main body 70 may be formed integrally with the end of the belt 21, attached to a connection object other than the belt 21, or formed integrally with the connection object. .
(Insertion part 50)
The insertion portion 50 is located at one end of the male member 30 as shown in FIGS. 3 to 6, and as shown in FIGS. 13 to 16, the insertion port 71 (FIGS. 1, 10, and FIG. 11) and is engaged.

  As shown in FIGS. 1, 3, and 5, the insertion portion 50 has a distal end in front of the insertion direction 71 (see FIGS. 1, 11, and 12), which will be described later, of the female member 40. It is tapering towards you. That is, the distal end portion of the insertion portion 50 is formed in a substantially anchor shape or a substantially “V” shape of uppercase letters, and the lateral width in the horizontal direction in FIGS. 3 and 5 is gradually narrowed toward the front in the insertion direction. ing.

As shown in FIGS. 3 to 6, the insertion part 50 includes the following parts when roughly classified.
In addition, each part of the insertion part 50 is not limited to following (1)-(3).
(1) Center shaft 51
As shown in FIGS. 1, 3, 5, and 6, the central shaft 51 extends in a columnar shape from the center in the left-right width direction of a belt passing portion 60 described later.

(2) Arm 52
As shown in FIGS. 1 and 3 to 5, the arm portion 52 is divided into two forks from the front end portion of the central shaft 51, and is folded back toward a belt passing portion 60 described later to be substantially an anchor type or an abbreviation of an uppercase letter. It extends in a “V” shape.
On the outer side surface of the free end portion of the arm portion 52, a stepped engagement portion 52a is provided. The engaging portion 52a engages with a locking portion 92a (see FIG. 12) located on a side wall 92 described later of the female member 40.

(3) Guide protrusion 53
As shown in FIGS. 1 and 3 to 5, the guide protrusion 53 is positioned on the central shaft 51 and is guided by being inserted into a guide groove 94 (see FIGS. 10 and 12) described later of the female member 40. is there.
As shown in FIG. 4, the guide protrusion 53 is formed in a convex portion that protrudes in the thickness direction from the insertion portion 50. That is, a pair of guide protrusions 53 protrude from the upper surface and the lower surface of the central shaft 51 positioned above and below in FIG.

Although a pair of guide protrusions 53 are provided on both surfaces of the central shaft 51 in the thickness direction, one or three or more guide protrusions 53 may be provided.
(Belt looping part 60)
As shown in FIGS. 1 to 6, the belt threading portion 60 is located on the other end of the male member 30, that is, on the side opposite to the insertion portion 50, and can be attached to the belt 20 so that the length can be adjusted. .

As shown in FIG. 3, the belt passing portion 60 is formed in a ring shape having a rectangular outer shape, and a second bar 63 described later is formed so as to cross the center of the ring. As shown in FIG. 16, the belt 20 passes through the hole of the ring while being meandered, and is folded back at the second bar 63 so that the belt 20 can be attached to be adjustable in length.
As shown in FIGS. 3 to 6, the belt passing part 60 includes the following parts when roughly classified.

In addition, each part of the belt passing part 60 is not limited to following (1)-(3).
(1) Side wall 61
The pair of side walls 61 are located on both the left and right sides in FIG. 3, and are formed in a rod shape extending long along the insertion direction of the insertion portion 50 as shown in FIGS. The side wall 61 protrudes larger than an insertion port 71 (see FIGS. 1, 11, and 12) described later of the female member 40.

(2) First bar 62
As shown in FIGS. 3, 5, and 6, the first bar 62 is located at the end of the side wall 61 and is formed to bridge the pair of side walls 61. The first bar 62 is located on the upper side of the side wall 61 in FIG. 6, and the lower side of the first bar 62 is sharpened in a tapered shape with a substantially triangular cross section.
(3) Second bar 63
As shown in FIG. 3, the second bar 63 is located in the middle of the side wall 61 in the longitudinal direction, and is formed so as to bridge the pair of side walls 61. Similar to the first bar 62, the second bar 63 is positioned above the side wall 61 in FIG. 6, and the lower side of the second bar 63 is sharpened to have a substantially triangular cross section.
(Female body 70)
As shown in FIGS. 7 to 12, the female main body 70 is positioned at one end of the female member 40, and the insertion portion 50 of the male member 30 is inserted into the female main body 70.

The female main body 70 is formed in a rectangular tube shape that is long in the left and right in FIG. That is, the female main body 70 includes an upper wall 90 positioned on the upper side, a bottom wall 91 positioned on the lower side, and a pair of side walls 92 positioned on the left and right. The female main body 70 has an insertion port 71 opened on the front side located on the left side in FIG. 11, and the back side located on the right side in the figure is closed.
As shown in FIGS. 7 to 12, the female main body 70 has the following parts.

The following (1) to (7) will be described later.
(1) Insertion slot 71
(2) Window part 72
(3) Release part 73
(4) Support part 73a
(5) Locking part 92a
(6) Tongue 93
(7) Guide groove 94
In addition, each part of the female main body 70 is not limited to the above (1) to (7).
(Belt fixing part 80)
As shown in FIGS. 7, 9 and 11, the belt fixing portion 80 is located on the other end of the female member 40, that is, on the side opposite to the female main body 70, and can be fixed through the belt 21. .

As shown in FIG. 7, the belt fixing portion 80 is formed in a ring shape having a rectangular outer shape. As shown in FIG. 16, the belt 21 is folded back through the hole in the ring and, although not shown, can be fixed to the belt fixing portion 80 by sewing in a state of being superposed vertically.
The structure of the belt fixing portion 80 is not limited to a rectangular ring shape, and may be the same structure as the belt passing portion 60 of the male member 30. Conversely, the structure of the belt passing portion 60 of the male member 30 may be the same as that of the belt fixing portion 80.
(Insertion 71)
As shown in FIG. 11, the insertion port 71 is located at one end of the female main body 70, and the insertion part 50 of the male member 30 is inserted therein.

The left and right opening widths of the insertion port 71 in FIG. 10 are set narrower than the maximum left and right widths of the insertion portion 50 in FIG. 3, that is, the interval between the outer surfaces of the left and right arm portions 52.
Further, as shown in FIG. 12, the opening width of the insertion port 71 is such that the inner side surfaces of the pair of left and right side walls 92 are inclined so that the width gradually decreases toward the back side of the hollow interior of the female main body 70. Yes.
(Window part 72)
The window 72 is located in the middle of the pair of left and right side walls 92 as shown in FIGS. 7 and 12, and as shown in FIG. 13, one of the left and right arm parts 52 inserted into the hollow interior of the female main body 70. It is for exposing the part. The window portion 72 is formed so as to partially bite into the upper wall 90 and the bottom wall 91.
(Release part 73)
As shown in FIGS. 1 and 2, the release unit 73 releases the connection state with the male member 30 by a release operation from the female member 40 side.

As shown in FIGS. 13 and 15, the release portion 73 has an inner surface, that is, an inner surface of a support portion 73a described later, which is in surface contact with the outer surface of the arm portion 52 of the male member 30 at least when released. It is.
The surface contact is not limited to the release, and the inner surface of the release portion 73 and the outer surface of the arm portion 52 may be brought into surface contact in a connected state with the male member 30. The generation of abnormal noise at the time of release has an advantage that the collision sound between the release part 73 and the arm part 52 at the time of release can be reduced.

The inner surface of the release portion 73 is in point contact when fully released while being in surface contact with the outer surface of the arm portion 52.
Further, as shown in FIGS. 13 and 15, the surface contact is an inner surface of the release portion 73, and is a distal end portion located rearward in the insertion direction of the insertion portion 50 of the male member 30, that is, a free end side distal end. Reach up to the department. Similarly, the surface contact reaches the distal end located on the outer surface of the arm portion 52 and rearward in the insertion direction, that is, the distal end on the free end side.

Further, the inner surface of the release portion 73 is shown in FIGS. 13 and 15 because the outer surface of the arm portion 52 is tapered toward the front in the insertion direction as shown in FIGS. In this way, the inclined outer surface is pressed and released.
Specifically, the release portion 73 protrudes from the pair of left and right side walls 92 toward the window portion 72 as shown in FIGS. 7 and 12, and is exposed through the window portion 72 as shown in FIG. It faces the left and right arm sections 52, respectively. The release portion 73 has one end connected to the pair of left and right side walls 92, the other end is a free end, and can be elastically bent toward the hollow interior of the female main body 70 using the one end as a hinge. ing.

Further, as shown in FIGS. 7 and 12, the release portion 73 is obliquely inclined outward in the direction away from the hollow interior of the female main body 70 toward the distal end portion of the free end portion. The release portion 73 is bent into an approximately upper case letter “V” or an upper case letter “L” in the direction of approaching the hollow interior of the female body 70 near the tip of the free end.
(Support part 73a)
As shown in FIG. 7, the support portion 73a is positioned on the inner surface of the release portion 73, has a slope opposite to that of the release portion 73, and makes surface contact with the outer surface of the arm portion 52 as shown in FIG. Is. The support portion 73a has an effect of improving the rigidity of the release portion 73 in addition to the effect of bringing the arm portion 52 into surface contact. That is, the support portion 73a prevents the release portion 73 from being partially broken when pushed with a finger.

Specifically, as shown in FIG. 7, the support portion 73a protrudes from the inner surface of the free end portion of the pair of left and right release portions 73 toward the window portion 72, and as shown in FIG. The left and right arm portions 52 exposed through the contact respectively.
The support portion 73a has an inner surface inclined obliquely toward the free end of the release portion 73, and the inner surface of the inclined surface is exposed through the window portion 72 as shown in FIG. Surface contact with 52 outer surface.

The pair of left and right arms 52 are tapered toward the front in the insertion direction, and are inclined in a substantially anchor shape or a substantially “V” shape of a capital letter, so that their outer surfaces are also inclined. In contrast, the inner surface of the inclined surface of the support portion 73a is also inclined in parallel with the inclination of the outer surfaces of the left and right arm portions 52 so that both surfaces come into surface contact.
(Locking part 92a)
As shown in FIG. 12, the locking portion 92a is located on the pair of left and right side walls 92, engages with the insertion portion 50 of the male member 30 inserted into the hollow interior of the female main body 70, and the insertion portion 50 is inserted. It is for locking in the state.

The locking portion 92a is located at the end of the side wall 92 facing the window portion 72, and abuts on the engaging portion 52a formed in a step shape at the distal end portion of the arm portion 52. That is, after the arm portion 52 passes through the insertion port 71 of the female main body 70, the arm portion 52 is elastically expanded at the position of the window portion 72, and at this time, the engaging portion 52a abuts on the locking portion 92a. Returning to the insertion slot 71 is prevented.
(Tongue 93)
As shown in FIGS. 1, 2, and 7 to 11, the tongue piece 93 is formed on one inner wall, for example, the bottom wall 91, of a pair of opposed inner walls of the female member 40, that is, the upper wall 90 and the bottom wall 91. It is provided and extends from the insertion port 71 in the insertion direction of the male member 30.

As shown in FIG. 11, the tongue piece 93 is formed in a plate shape continuous with the bottom wall 91, and as shown in FIG. 9, when viewed from the plane, it is formed in a trapezoidal shape that becomes narrower toward the tip. Has been.
As shown in FIG. 11, the tongue piece 93 has a slope that is lowered with respect to the insertion direction of the male member 30.
As shown in FIG. 16, the tongue piece 93 extends to a position on the belt passing portion 60 of the male member 30. The tongue piece 93 is positioned such that the tip portion inclined downward is opposed to the lower side of the first bar 62 of the belt passing portion 60 in FIG. The tongue piece 93 is set to be slightly shorter than the total length in the insertion direction of the belt threading portion 60, that is, the length in the left-right direction in the figure, and the end of the belt threading portion 60 and the left end are slightly from the tip of the tongue piece 93. It protrudes.

As shown in FIG. 16, the gap between the tongue piece 93 and the belt passing portion 60 is approximately equal to the thickness of the belt 20 overlapped vertically between the tip portion of the tongue piece 93 inclined downward and the first bar 62. Are set equal.
Further, the tongue piece 93 has elasticity.
The elasticity of the tongue piece 93 is set so that it does not bend when tension is applied in a direction in which the belt 20 is detached from the belt passing portion 60 of the male member 30.

On the other hand, the elasticity of the tongue piece 93 is set so as to bend in a direction away from the belt passing portion 60 when a tension close to the breaking limit of the belt passing portion 60 is applied. That is, the tongue piece 93 bends in a direction away from the first bar 62 of the belt passing portion 60, thereby allowing the belt 20 to be removed from the belt passing portion 60, thereby preventing the belt passing portion 60 from being broken. It is preventing.
(Guide groove 94)
The guide groove 94 is formed at least on one inner wall of the pair of inner walls facing the female member 40, that is, the upper wall 90 and the bottom wall 91 facing vertically in FIG. The guide protrusion 53 is guided.

As shown in FIG. 10, a pair of guide grooves 94 are provided symmetrically in the vertical direction on the top and bottom surfaces of the inner wall of the female member 40, that is, on the bottom surface of the top wall 90 and the top surface of the bottom wall 91 in the same figure.
As shown in FIG. 10, the guide groove 94 is formed in a concave shape that is recessed from the upper wall 90 and the bottom wall 91.
As shown in FIG. 12, the guide groove 94 is widened toward the insertion port 71. That is, as shown in the figure, the guide groove 94 is linearly formed with a constant groove width from the back side of the hollow interior of the female main body 70 toward the insertion port 71. The guide groove 94 is formed with an introduction portion 94a having a groove width opened from an intermediate part of the hollow inside of the female body 70 toward the insertion port 71 in an approximately upper case letter “V” or an upper case letter “Y”. ing.

The bottom surface of the introduction portion 94a is formed flush with the top surface of the tongue piece 93, and the top surface of the tongue piece 93 is one step lower than the top surface of the bottom wall 91.
(how to use)
Next, a method for using the buckle 10 having the above-described configuration will be described with reference to FIGS. 1, 2, and 13 to 16.

First, as shown in FIG. 16, two belts 20 and 21 are attached to the belt passing portion 60 of the male member 30 and the belt fixing portion 80 of the female member 40, respectively.
(Consolidation method)
Next, in order to connect the male member 30 and the female member 40, the insertion portion 50 of the male member 30 is inserted in accordance with the insertion port 71 of the female main body 70 as shown in FIG.

  When the insertion portion 50 is inserted, the guide protrusions 53 protruding in a convex shape from both surfaces in the thickness direction of the central shaft 51 are respectively formed in the guide grooves 94 formed in a concave shape on the upper wall 90 and the bottom wall 91 of the female body 70, respectively. Get stuck. At this time, the guide protrusion 53 fits into the introduction portion 94a where the groove width of the guide groove 94 is widened, is guided by the introduction portion 94a, and extends linearly toward the back side of the hollow interior of the female main body 70. Proceed to

On the other hand, when the insertion portion 50 is inserted, the outer surfaces of the pair of left and right arm portions 52 come into contact with the end portions of the side walls 92 facing the insertion port 71.
When the insertion portion 50 is further inserted, the outer surfaces of the pair of left and right arm portions 52 are pushed by the inner surfaces of the pair of left and right side walls 92 and bend in a direction approaching each other. For this reason, the pair of left and right arm portions 52 can pass through the insertion port 71 and advance toward the back side of the hollow interior of the female main body 70.

Further, when the insertion part 50 is inserted, the pair of left and right arm parts 52 are positioned in the window part 72 of the female main body 70 and restored to the elastic restoring force of the resin.
At this time, a stepped engagement portion 52a is brought into contact with a locking portion 92a located at the end of the side wall 92 facing the window portion 72 at the distal end of the arm portion 52. At this time, a “click” sound is generated and the engagement portion 52a comes into contact with the locking portion 92a with a sense of moderation. When the engaging portion 52a comes into contact with the locking portion 92a, the arm portion 52 is prevented from returning to the insertion port 71, and the male member 30 and the female member 40 are connected as shown in FIGS. Locked.

Therefore, the two belts 20 and 21 are connected to each other via the buckle 10 as shown in FIGS.
At this time, the support portion 73a that protrudes from the inner surface of the free end portion of the pair of left and right release portions 73 facing the window portion 72 is exposed through the window portion 72 as shown in FIGS. Surface contact is made with the outer surfaces of the left and right arm portions 52.
(How to release the connected state)
Next, in order to release the connected state, the pair of left and right release parts 73 may be pushed in directions approaching each other.

  When the release part 73 is pushed in, the free end part turns with the part connected to the side wall 92 as a hinge. At this time, in a state in which the inclined inner surface of the support portion 73a located on the free end side is in surface contact with the outer surface of the arm portion 52 inclined in the same direction, the pair of left and right arm portions 52 are brought closer to each other. Push in. When the arm part 52 is pushed in, the free end part turns with the part connected to the central shaft 51 as a hinge.

At this time, since the rotation centers of the support portion 73a and the arm portion 52 are different, the contact area gradually decreases from the surface contact state and shifts to a point contact or line contact state.
When the release portion 73 is pushed into a point contact or line contact state, the engagement portion 52a of the arm portion 52 is disengaged from the engagement portion 92a of the side wall 92 facing the window portion 72, and the locked state is released.
When the locked state is released, the pair of left and right arm portions 52 are pushed by the support portion 73a and pushed toward the insertion port 71.

When the pair of left and right arm portions 52 are pushed out, they pass through the insertion port 71 in a bent state, and at that time, the force is restored from their own elastic restoring force, so that they pop out of the insertion port 71 vigorously.
Therefore, the male member 30 and the female member 40 are separated from each other as shown in FIG. 1, and the connection state of the two belts 20 and 21 is released.
(Action of tongue 93)
Next, the operation of the tongue piece 93 will be described.

First, as shown in FIG. 1, when the insertion portion 50 of the male member 30 is inserted into the insertion port 71 of the female main body 70, the insertion portion 50 is guided by the tongue piece 93 to restrict the insertion direction of the insertion portion 50. Can do.
That is, when the insertion portion 50 is inserted parallel to the insertion port 71, the lower surface of the insertion portion 50 is guided toward the insertion port 71 while sliding on the upper surface of the tongue piece 93.
When the insertion port 71 is inserted obliquely from above, the distal end portion of the insertion portion 50 collides with the upper surface of the tongue piece 93 and is guided so as to be parallel to the insertion port 71.

Further, when the insertion piece 71 is inserted obliquely from below, the tongue piece 93 is a slope that is lowered with respect to the insertion direction of the insertion portion 50 as shown in FIG. It is guided so as to be parallel to the insertion slot 71 while moving.
After the connection, as shown in FIG. 16, the tongue piece 93 faces the first bar 62 of the belt passing portion 60 and is folded back by the second bar 63 within the interval between them so as to be superimposed on the upper and lower sides of the belt 20. The polymerized portion is located.

For this reason, even if a force is exerted to pull the base end portion of the belt 20 located on the lower side obliquely downward, the tongue piece 93 is located on the lower side, so that the movement is prevented.
For this reason, the belt 20 can be prevented from loosening by preventing the movement of the belt 20 by the tongue piece 93.
(Second Embodiment of FIGS. 17 to 19)
Next, a second embodiment of the present invention will be described with reference to FIGS.

The feature of this embodiment is that the tongue piece 93 of the first embodiment described with reference to FIGS. 1 to 16 is omitted.
The male member 30 used in the present embodiment has the same structure as that of the first embodiment.
In the description of the present embodiment, the same reference numerals are used for portions having the same configuration as in the first embodiment, and the description thereof is omitted.

10 buckle 20,21 belt
30 Male member 40 Female member
50 Insertion section 51 Center axis
52 Arm 52a Engagement part
53 Guide protrusion
60 Belt thread 61 Side wall
62 1st bar 63 2nd bar
70 Female body
71 Insertion slot 72 Window
73 Release part 73a Support part
80 Belt fixing part
90 Top wall 91 Bottom wall
92 Side wall 92a Locking part
93 Tongue
94 Guide groove 94a Introduction part

Claims (4)

It is composed of a male member and a female member into which the male member is inserted,
It is a buckle that releases the connected state with the male member by a releasing operation from the female member side,
During the release, the outer surface of the arm portion of the male member and the inner surface of the release portion of the female member are in surface contact,
On the inner surface of the release part,
Providing a support portion in surface contact with the outer surface of the arm portion;
The female member is
It is formed in a cylindrical shape, is composed of an upper wall located on the upper side, a bottom wall located on the lower side, and a pair of side walls located on the left and right sides, and has an insertion opening opened on the front side,
In the middle of the pair of left and right side walls,
A window portion that exposes a part of the arm portion inserted from the insertion port ;
The release unit is
One end is connected to a pair of left and right side walls, the other end is a free end,
In the vicinity of the front end of the first free end, the first free end inclined obliquely outward in the direction away from the side wall of the female body toward the front end of the free end, A second free end bent in a direction approaching the side wall of the female body,
The support portion is located across the inner side surface of the first free end portion and the inner side surface of the second free end portion of the release portion, protrudes toward the window portion, and passes through the window portion. Abut each of the exposed arm parts,
The inner surface of the support portion has a slope inclined obliquely outward in a direction away from the side wall of the female body, and the inner surface of the slope is exposed through the window portion. A buckle characterized by being in contact with the surface. The outer surface of the arm portion and the inner surface of the support portion of the release portion,
While contacting the surface,
The buckle according to claim 1, wherein the buckle is in point contact when fully released.   The outer surface of the arm portion is inclined in a tapered manner toward the front in the insertion direction, and the inclined outer surface is pressed by the inner surface of the support portion of the release portion to be released. Or the buckle of Claim 2. The surface contact is
In a state where the male member and the female member are engaged,
While reaching the distal end located on the outer surface of the arm portion and rearward in the insertion direction,
The buckle according to any one of claims 1 to 3, wherein the buckle reaches an inner side surface of the support portion of the release portion and reaches a tip portion located in the same direction as the tip portion.

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