JPH1071008A - Buckle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a buckle, which is easily and speedily attachable and detachable, the molding die of which is composed so compactly that the molding material for the same may be reduced. SOLUTION: The buckle is composed of a male part 10 equipped with a pair of flexible arms 13 and a female part 20 equipped with a cylindrical part 23 which is capable of storing the pair of flexible arms 13. The male part 10 is formed as outer side faces 15 of manipulating pieces 14 of the flexible arms 13 are protruded curving outward, and the male part 10 is equipped with a pair of protrudent clutch railings 17 that are symmetrically set protruding to the direction of the thickness of the cylindrical part 23, and clutch tips 18 are formed at the end of the protrudent clutch railings 17. Then, the female part 20 is formed as inner side faces 25a of side faces 25 of the cylindrical part 23 are widening deltaic toward an insertion opening 24, and a pair of guides 33 for the protrudent clutch railings, guides which are set protrudingly on the inner side faces 25a, and clutching faces 34 that are formed at the tip part of the guides 33 are equipped to the female part 20, and the oversailing height of protruding of center part of outer faces of manipulating pieces 14 are formed higher than the height of the guides 33 for the protrudent clutch railings.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buckle of the insertion connection type comprising a male member and a female member.

[0002]

2. Description of the Related Art Conventionally, in an insertion type buckle for connecting a belt or the like, in order to prevent a male member from being inserted obliquely into a female member, a configuration has been proposed in which both male and female members are provided with corresponding insertion guide portions. Have been.

As an example of such a buckle, Japanese Patent Publication No.
Buckles disclosed in JP-A-31683 and JP-A-7-250704. These buckles have a pair of flexible arms projecting in parallel from both sides of the base of the male member, and a central arm extending along the central axis direction is provided between the two flexible arms. Further, a guide groove (or guide rib) that extends from the insertion port to the bottom of the cylindrical portion along the central axis and receives the above-described central arm is provided in the cylindrical portion of the female member.

When a male member is inserted into a female member having this configuration,
The central arm is guided into the guide groove and enters, and the male member is properly connected straight to the female member. Further, at the time of separation, the male member is drawn straight out of the female member by sliding contact between the central arm and the guide groove as described above.

[0005]

However, in such a conventional buckle, since the long central arm and the guide groove are inserted in sliding contact, the male member and the female member are smoothly connected. In this method, it is necessary to accurately align the center arm and the guide groove, and to perform the insertion operation while keeping the center arm and the guide groove parallel. Further, at the time of separation, an operation of separating while paying attention to the inclination of the central axes of both the male and female members is required.

In general, at the start of insertion, the insertion direction of the male member tends to be unstable, and if the center axes of both the male and female members are inclined at the time of insertion, the end of the central arm will be at the guide groove entrance. And cannot be inserted, making the connection operation difficult. Further, if the two central axes are inclined, there is a problem that the frictional resistance between the male and female members is increased during insertion and removal, and smooth insertion and separation operations are impaired.

Further, the formation of the central arm and the guide groove complicates the molds for forming the male member and the female member, which may increase the mold cost and decrease the durability of the mold. Since a projection such as a central arm is added, the amount of molding material used increases, and there is a problem that the buckle becomes expensive.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to enable easy and smooth connection and separation operations, and to simply form a molding die, An object of the present invention is to provide a buckle which can save material for use.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and a buckle according to the first invention has an operating body and an engaging portion and is substantially parallel from both sides on the base side. A male member having a pair of flexible arms protruding from each other and a tubular portion having an insertion port at one end and capable of accommodating the pair of flexible arms; At least a part of the operating body of the pair of flexible arms opened and inserted in the side wall is formed so as to be respectively exposed and has a pair of windows having an engaging edge engageable with the engaging portion. A buckle comprising: a female member, wherein the male member is
The outer surfaces of the respective operating bodies of the pair of flexible arms are formed so as to be curved outward and protrude, and the pair of flexible arms are respectively extended from distal ends thereof toward the base portion, and The female member includes a pair of engagement ridges symmetrically protruded in the thickness direction of the cylindrical portion, and engagement ends respectively formed on a base side of each of the engagement ridges. A pair of ridge guides, each of which has an inner surface of the opposite side wall of the cylindrical portion formed so as to expand in the direction of the insertion opening, and which is provided inwardly on each of the inner surfaces of the opposite side wall, respectively. And an engagement surface formed at an end of the ridge guide on the side of the window, respectively, wherein a height of the center of an outer surface of the operating body is higher than that of the inner surface of the ridge guide. The buckle is formed to be larger than the protruding height of the buckle.

A buckle according to a second aspect of the present invention has a male member having a pair of flexible arms which have an operating body and an engaging portion, and which are substantially parallel and project from each other on both sides of a base portion, and one end thereof. A tubular portion having an insertion port and capable of accommodating the pair of flexible arms is provided, and at least a part of each of the pair of operating bodies of the pair of flexible arms that are opened and inserted into the opposite side walls of the tubular portion are respectively provided. A female member having a pair of windows formed so as to be exposed and having an engaging edge engageable with the engaging portion, wherein the male member comprises the pair of flexible arms. The outer surfaces of the respective operating bodies are formed so as to be curved outward and protrude, and the pair of flexible arms are respectively extended from their distal ends toward the base portion and have a thickness of the cylindrical portion. A pair of engaging projections projecting symmetrically in the direction, wherein the female member is A pair of ridge guides, each of which has an inner surface of the opposite side wall of the cylindrical portion formed so as to be divergent in the direction of the insertion opening, and which projects inwardly from each of the inner surfaces of the opposite side wall, respectively. A buckle, wherein a height of a protrusion at a center portion of an outer surface of the operation body is formed to be larger than a height of a protrusion of the ridge guide from the inner surface.

A buckle according to a third aspect of the present invention is a male member having a pair of flexible arms which have an operating body and an engaging portion and are substantially parallel and project from each other on both sides on the base side. A tubular portion having an insertion port and capable of accommodating the pair of flexible arms is provided, and at least a part of each of the pair of operating bodies of the pair of flexible arms that are opened and inserted into the opposite side walls of the tubular portion are respectively provided. A female member having a pair of windows formed so as to be exposed and having an engaging edge engageable with the engaging portion, wherein the male member is provided on each of the flexible arms. Each of the female members includes a pair of engaging ridges extending from the distal end toward the base portion and symmetrically projecting in the thickness direction of the cylindrical portion. Equipped with a pair of ridge guides projecting inward on the inner side, respectively When the central axis of the male member is oblique to the central axis of the female member, the distal ends of the engagement ridges of the flexible arm, which are inserted shallowly, slide on the corresponding ridge guides to form the two central axes. And a buckle formed so as to coincide with the buckle.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 6, the buckle according to the present embodiment comprises a male member 10 having a pair of flexible arms 13 having an operating body 14, a cylinder having an insertion port 24 and a pair of windows 30. The male member 10 is formed with the outer surface 15 of the operating body 14 protruding outward, and the flexible arm 13 is formed with a pair of engaging ridges 17. And an engaging end 18 formed on the engaging ridge 17.
Reference numeral 0 denotes a pair of ridge guides 33 formed on the inner surface 25a of the side wall 25 facing the cylindrical portion 23 so as to be flared, and a pair of ridge guides 33 provided on the inner surface 25a. And a surface 34.

The male member 10 is made of a synthetic resin material having a spring elasticity, for example, a nylon resin. The male member 10 is parallel to and opposed to the central axis X on both sides of a base 12 connected to the belt connecting portion 11. It is formed with a pair of symmetrical flexible arms 13 extending in _one direction.

The inside of each of the flexible arms 13 is formed in a substantially straight line, and the gap is slightly narrowed at the distal end. Outside the first half of both flexible arms 13, operating bodies 14 each having a predetermined width R and having an outer surface 15 that is curved outward and are provided are provided. Is formed with a step-like engaging portion 16. On the inner side of the first half of both flexible arms 13, engaging projections 17, 17 are provided which extend substantially linearly along the inner side surface 13 a and are slightly shorter than the length of the operating body 14. It is formed in a substantially T shape.

The outer surface 15 of the operating body 14 is
3 toward the base 12 from the tip of the tapered portion 15a,
It is formed on a composite surface that is continuous with the flat part 15b and the base end part 15c. In this example, previously窄部15a has a central axis X ₁ direction length about 1/2 of the length of the outer surface 15, a flat portion 15b which continues, almost 1/4, further followed the same length Base end 15
c is formed to have a length of about 1/4 of the same length.

The outer surface 15 has a tapered portion 15a and a flat portion 15a.
b, the maximum protruding height H (the maximum height H protruding outward at a right angle from the engaging ridge 17 shown in FIG. 1).
Is formed. Then, the flexible arm 1
3 Toward the tip, the tapered portion 15a becomes curved and tapered.
Is formed, and the tapered portion 15 a is formed so as to converge with the engaging ridge 17 at the distal end of the flexible arm 13. Flat part 1
5b has a maximum overhang height H and is formed to extend flat in the direction of the engaging portion 16. The base end portion 15c is curved toward the engagement portion 16 so as to be slightly lower than the overhang height H.

As shown in FIGS. 2 and 3, the engaging ridges 17 are formed to protrude from the width R of the operating body 14 in the width direction (vertical direction in FIGS. 2 and 3). The entire width including the protruding engagement ridges 17 is slightly smaller than a thickness direction inner dimension U of the cylindrical portion 23 described later. Also on the base 12 side of the engaging projection 17, it is inclined to the central axis X ₁ slightly acute angle, engagement end 18 are formed respectively.

The female member 20 is made of the same nylon resin as the male member 10 and has a base 22 connected to a belt connecting portion 21 at one end and a cylindrical portion 23 having an insertion port 24 at the other end.
Is formed.

The cylindrical portion 23 has opposite side walls 25, 25.
And the front and rear walls 26 and 27 facing each other,
It is formed in a flat rectangular tube shape having a predetermined thickness direction inner dimension U. The ratio U / R between the thickness direction inner method U and the width R of the operating body 14 is set to 1 / 0.56 in this example.

Each of the side walls 25, 25 has an inner surface,
Inner surface 25 diverging toward insertion slot 24
The windows 30, 30 which are formed to have a and penetrate outward (outside in the direction perpendicular to the central axis X ₂ ) are provided on the side of the side walls 25, 25 facing the base 22. Each side wall 2
5 forms an engaging edge 31 that can be engaged with the engaging portion 16 of the male member 10 to be inserted, and an edge of the base 22 on the window 30 side forms a window edge 32. doing.

On the inner surface of each side wall 25 near the window 30, there are formed protruding guides 33, 33 which can be brought into sliding contact with the engaging protuberances 17, 17 of the flexible arm 13, respectively. Ridge guide 3
3 and 33 are formed so as to protrude inward from corners of the inner wall surface 25a on the front wall 26 side and corners of the inner wall surface 25a on the rear wall 27 side, respectively. , Are formed in a divergent shape substantially parallel to the inner side surface 25a. Then, the ridge guide 3 from the inner side surface 25a.
The protruding height G to the inner portion 33a of the third member 3 is formed to be about 2/3 of the maximum overhang height H of the outer surface 15 of the operating body 14.

On the side of the window 30 of each ridge guide 33, the ridge guide 33 slightly projects from the engagement rim 31 toward the base 22.
Engaging surfaces 34 respectively engageable with the engaging ends 18 of 7,
Are formed.

A pair of guides 37 are formed on the base 22 side in the cylindrical portion 23, and the outer sides of the guides 37, 37 are tapered and inclined toward the insertion port 24. Inclined surfaces 38, 38 are formed. Reference numeral 40 denotes a belt.

In the buckle thus constructed, as shown in FIG. 1, the male member 10 and the female member 20 are opposed to each other, and the flexible arms 13, 13 are inserted into the cylindrical portion 23 from the insertion port 24. Be linked.

When the center axis X ₁ of the male member 10 is inserted substantially in line with the center axis X ₂ of the female member 20, the outer surfaces 15 of the respective operating bodies 14 of both flexible arms 13 become cylindrical portions. 23
Almost simultaneously at the same time.

As the male member 10 is inserted, both outer surfaces 15
The flexible arms 13 are pressed almost evenly inward by the curved overhang and the inclination of both inner side surfaces 25a to be elastically deformed. Then, when the engaging portion 16 reaches the engaging edge 31 and the engaging ends 18, 18 reach the engaging surfaces 34, 34, the two flexible arms 13 are released from being pressed by the two inner side surfaces 25a. Bounce to

As a result, most of the operating bodies 14 are exposed from the windows 30, respectively, and the tip of each operating body 14 is
Close to the inside of each window edge 32. In both windows 30, the engaging portion 16 and the engaging edge 31, and the engaging ends 18, 18 are provided.
And the engaging surfaces 34, 34 respectively engage the male member 10 and the female member 20 at a total of six locations on both sides, and can withstand a large tensile strength in the buckle separating direction (see FIG. 9). .

Next, a case where the male member 10 is inserted obliquely into the female member 20 will be described.

The central axis X ₁ of the male member 10 is inserted into the obliquely with respect to the central axis X ₂ of the female member 20, first enters deeper one of the flexible arm 13 to the tubular portion 23, the other Flexible arm 13 enters shallowly. FIG. 7 shows this oblique insertion state, in which the flexible arm 13 that has entered deeply (hereinafter referred to as the upper flexible arm 13 with reference to FIG. 7) has a flat portion 15 b of the outer surface 15 of the operating body 14. The flexible arm 13 which comes into contact with the corresponding inner side surface 25a and enters shallowly (hereinafter referred to as the lower flexible arm 13) has the engaging ridges 17, 17 whose tips contact the corresponding ridge guides 33, 33. I do.

At this time, the lower end of the flexible arm 13 slidably comes into contact with the inner portions 33a, 33a of the ridge guides 33, 33 at the tips of the engaging ridges 17, 17; That is, there is a gap between the tapered portion 15a and the inner surface 25a,
It is in a non-contact state (see FIGS. 7 and 12). Further, in this state, when the insertion is advanced due to the difference in the contact portion between the upper and lower flexible arms 13 and the cylindrical portion 23, the lower flexible arm 13 with which the distal end contacts is flexible. The upper arm 13 is bent more easily than the upper flexible arm 13 and slides easily.

When the insertion is advanced, the male member 10 is rotated clockwise in FIG. 7 while the lower flexible arm 13 is bent with the periphery of the contact portion between the upper flexible arm 13 and the corresponding inner surface 25a as a fulcrum. It enters into the female member 20 while rotating in the direction. That is, the engagement ridges 17, 1 of the lower flexible arm 13
7 slides into the inner portions 33a, 33a with small frictional resistance and smoothly enters, and the vicinity of the maximum overhang height of the tapered portion 15a comes into slidable contact with the corresponding inner side surface 25a, and the lower side is contacted. The flexible arm 13 enters deeply, and the central axis X ₁ and the central axis X ₂
And the angle of intersection gradually decreases (see FIG. 8).

When the insertion of the male member 10 is further advanced, each flat portion 15b of each of the flexible arms 13 faces each of the inner side surfaces 25a of the tubular portion 23, and the both flexible arms 13 are almost uniformly. Elastically deform. Then, the two central axes X ₁ , X ₂ are in an appropriate insertion posture substantially on the same line, the engaging portion 16 reaches the engaging edge 31, and the engaging ends 18, 18 are engaged with the engaging surfaces 34,
Reach 34. Subsequently, the two flexible arms 13 spring outward and expand, and each of them engages with each other and each of the tapered portions 15a.
Contacts the window edge 32 to connect the male member 10 and the female member 20 (see FIG. 9).

In order to separate the male member 10 and the female member 20 from the connected state, each operating body 14 of both flexible arms 13 is pressed inward (in the direction of arrow P in FIG. 10) with the thumb and the index finger. I do. Thereby, each flexible arm 13 bends inward, the engagement between the engagement portion 16 and the engagement edge 31, and the engagement ends 18, 18
Is disengaged at a stretch.

At this time, the two flexible arms 13 bent inward
The distal end portion abut respectively on the inclined surface 38 of the guide member 37, and at the same time excessive inward deflection is suppressed, both flexible arms 13, along the central axis X ₂ by the inclined surface 38 It is guided toward the insertion slot 24. The male member 10 is urged in the withdrawal direction by the slip between each operating body 14 and the pressing finger and the outward elastic force of both flexible arms 13.
It is separated from the female member 20.

FIG. 11 shows a state in which separation is being performed, and each operating body 14 of both flexible arms 13 has a base end 15 c having an engagement edge 3.
1, the flat portion 15 b slides into the flared inner surface 25 a toward the insertion port 24 while sliding into the insertion port 2.
Move in four directions. At this time, the outer side surface 15 contacts the inner side surface 25a at the portion of the maximum overhang height H, and the engaging ridge 1
7, 17 and the guide inner portions 33a, 33a are in a non-contact state (see FIGS. 11 and 13).

Therefore, at the time of separation, each of the flexible arms 13
Is in sliding contact with the inner side surface 25a with a width R of the outer side surface 15 which is smaller by the projection width of the engaging projections 17, 17, so that the frictional resistance between both the flexible arms 13 and the tubular portion 23 is reduced. Therefore, the resistance that hinders the pull-out biasing force of the male member 10 decreases, and the male member 10
Is smoothly repelled and separated from the female member 20.

It should be noted that the present invention is not limited to the above description and examples of the drawings, and the embodiments thereof can be modified without departing from the technical idea of the present invention. For example, even if the engaging ridges 17, 17 and the engaging surfaces 34, 34 are not engaged, the posture of the oblique insertion of the male member can be corrected,
In addition, the connecting and separating operations can be performed smoothly.

[0039]

As described above, according to the buckle of the present invention, the male member is formed such that the outer side surfaces of the respective operating bodies of the pair of flexible arms are curved and extended, and the pair of engaging members are engaged with the respective operating bodies. With a ridge, the female member is on the inner surface of both side walls of the cylindrical portion,
With a pair of ridge guides, when inserted, male,
Even if the center axes of the female members are inclined, proper insertion connection can be performed easily and smoothly.

Therefore, it is not necessary to provide the male member and the female member with the central arm and the guide groove, respectively, so that the buckle molding die can be simply configured to reduce the die cost and improve the durability. be able to. Further, the amount of the molding material used can be reduced, and the buckle can be formed at low cost.

In addition, the inner surface of the cylindrical portion is formed to be divergent, the height of the center of the outer surface of each flexible arm is made larger than the height of the protrusion guide, and a pair of protrusions is provided on the operating body. Since the strip guides are protruded in the width direction, the frictional resistance between the two flexible arms and the tubular portion is reduced, and the separation of the male member from the female member can be performed lightly and smoothly.

Further, in addition to the engaging portion of each flexible arm,
Since the male member and the female member are engaged and connected at a total of six positions by each pair of engagement ridges, even if an unexpected external force is applied to the buckle, the connected state can be stably maintained, Also, there is an effect that the buckle can endure a large tensile strength in the separating direction.

[Brief description of the drawings]

FIG. 1 is a front view of a buckle according to an embodiment of the present invention in a separated state.

FIG. 2 is a side view of the male member of FIG.

FIG. 3 is a view of the male member in FIG.

FIG. 4 is a sectional front view of the female member of FIG. 1;

FIG. 5 is a longitudinal sectional view of the same female member.

FIG. 6 is a view of the female member of FIG.

FIG. 7 is a partial cross-sectional front view showing a connection process when the buckle of the present invention is obliquely inserted.

FIG. 8 is a partial cross-sectional front view showing a second connection process during oblique insertion.

FIG. 9 is a partial cross-sectional front view showing a connected state of the buckle of the present invention.

FIG. 10 is a partial cross-sectional front view showing the operation of disconnecting the buckle according to the present invention.

FIG. 11 is a partial cross-sectional front view showing the same separation process.

FIG. 12 is a sectional view taken along the line CC of FIG. 7;

FIG. 13 is a sectional view taken along the line DD in FIG. 11;

[Explanation of symbols]

 Reference Signs List 10 male member 13 flexible arm 14 operating body 15 outer surface 15a tapered portion 15b flat portion 15c base end 16 engaging portion 17 engaging ridge 18 engaging end 20 female member 23 cylindrical portion 24 insertion opening 25a inner surface 33 ridge guide 34 engagement surface

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masako Araki 1-415 Ozakiyama, Midori-ku, Nagoya-shi, Aichi 103 Shatre Midorigaoka Room 103 (72) Inventor Keiji Minoba 4455 Nakanobo, Takegi-cho, Takeri-gun, Gifu Prefecture

Claims (3)

[Claims] A male member having a pair of flexible arms which are substantially parallel from opposite sides of a base side and have an operating body and an engaging portion, and which are provided so as to be opposed to each other; A cylindrical portion capable of accommodating the pair of flexible arms is provided, and at least a part of the operating body of the pair of flexible arms, which is opened and inserted into the opposite side wall of the cylindrical portion, is formed to be exposed. A female member including a pair of windows having an engagement edge engageable with the engagement portion,
The male member is formed such that an outer surface of each operating body of the pair of flexible arms is bent outward and protrudes, and the pair of flexible arms is A pair of engaging protrusions each extending toward the base portion and projecting symmetrically in the thickness direction of the tubular portion; and a pair of engagement protrusions formed on the base side of each of the engagement protrusions. And the female member is formed such that each inner surface of the opposite side wall of the cylindrical portion is formed so as to expand toward the insertion port, and each inner surface of the opposite side wall is inwardly formed. A pair of ridge guides protruding toward the housing, and engagement surfaces respectively formed at ends of the ridge guides on the side of the window portion, and a central portion of an outer surface of the operating body overhangs. The height is formed to be greater than the height of the protrusion guide from the inner surface. A buckle characterized by: 2. A male member having a pair of flexible arms which have an operating body and an engaging portion and are substantially parallel and project from each other on both sides of a base portion, and an insertion port at one end. A cylindrical portion capable of accommodating the pair of flexible arms is provided, and at least a part of the operating body of the pair of flexible arms, which is opened and inserted into the opposite side wall of the cylindrical portion, is formed to be exposed. A female member including a pair of windows having an engagement edge engageable with the engagement portion,
The male member is formed such that an outer surface of each operating body of the pair of flexible arms is bent outward and protrudes, and the pair of flexible arms is Each of the female members is provided with a pair of engaging protrusions extending toward the base direction and symmetrically protruding in the thickness direction of the cylindrical portion. Each inner side surface is formed so as to diverge in the direction of the insertion opening, and a pair of ridge guides are provided on each of the inner side surfaces of the opposing side walls so as to protrude inward, respectively. A buckle, wherein a protrusion height of a central portion is formed to be larger than a protruding height of the protrusion guide from the inner side surface. 3. A male member having a pair of flexible arms substantially parallel to and protruding from opposite sides of a base having an operating body and an engaging portion, and having an insertion port at one end. A cylindrical portion capable of accommodating the pair of flexible arms is provided, and at least a part of the operating body of the pair of flexible arms, which is opened and inserted into the opposite side wall of the cylindrical portion, is formed to be exposed. A female member including a pair of windows having an engagement edge engageable with the engagement portion,
A buckle comprising: a pair of male members, each of which extends from a distal end of each of the flexible arms toward the base portion and projects symmetrically in a thickness direction of the tubular portion. The female member includes a pair of ridge guides protruding inwardly on respective inner side surfaces of the opposing side walls, and a center axis of the inserted male member is When obliquely oblique to the center axis of the female member, the distal end of the engagement ridge of the flexible arm inserted shallowly is formed so as to slidably contact the corresponding ridge guide so that both center axes coincide with each other. A buckle characterized by: