JPH09206113A - Guidless buckle made of plastic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and smoothly perform connecting and separating operations and to simply constitute a die for molding. SOLUTION: This buckle is composed of a male member 10 provided with a pair of flexible arms 14 provided with a pressing body 15 and an engagement part 16 and a center arm 17 extended in an insertion axial direction and a female member 20 provided with a cylindrical part 25 capable of housing a pair of the flexible arms 14 and the center arm 17, a pair of window parts 32 provided with an engagement edge 33 opened on the side wall 27 of the cylindrical part 25 engageable with the engagement part 16 and a receiving body 35 projectingly provided in the insertion axial direction inside the cylindrical part 25 from a belt connection part side. Then, the receiving body 35 is provided with a holding part 36 where a center arm tip part 17a is fittable and an introduction part 37 continued to the opening of the holding part 36 and expanded and formed in the direction of the opening part 28 of the cylindrical part 25 capable of guiding the inserted center arm 17 in the direction of the holding part 36.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic guideless buckle including a male member and a female member.

[0002]

2. Description of the Related Art Conventionally, in a plastic buckle for connecting belts, a structure has been proposed in which a male member insertion guide portion is provided on the female member side in order to prevent the male member from being obliquely inserted into the female member.

An example of such a buckle is the buckle disclosed in Japanese Patent Publication No. 4-31683. According to this buckle, a pair of insertion arms are projected in parallel to the belt connecting portion of the male member, a central arm extending in the insertion axis direction is provided in the middle, and the central arm is provided in the tubular portion of the female member. A guide groove is formed vertically to receive the straight line.

When a male member is inserted into a female member having this configuration,
The central arm is slidably guided in the guide groove, and the male member is straightly inserted and connected. Also when separating, the male member is pulled out straight by sliding contact between the guide groove and the central arm.

According to the buckle disclosed in Japanese Utility Model Publication No. 57-18970, a wall-shaped anti-sway coupling piece extending in the insertion axis direction is provided in the central portion of the tubular portion of the female member, and the male member is provided. An Ω-shaped linear body is provided between the pair of insertion arms. When the male member is inserted into the female member having this structure, the anti-sway coupling piece and the linear member are fitted to each other so that the insertion pieces on both sides and the tubular portion are prevented from being tilted and connected. It is configured.

[0006]

However, in such a conventional plastic buckle, for example,
Since the guide groove and the central arm are provided with the former guide groove, since the guide groove and the central arm have a linear structure parallel to the insertion direction of the male member,
From the start to the completion of connection or separation, the guide groove and the central arm are in sliding contact. Therefore, in order to facilitate the attachment / detachment of the male member and the female member, it is necessary to perform the inserting / withdrawing operation while keeping the central arm and the guide groove parallel to each other. Generally, at the beginning of insertion,
There has been a problem that the inserting direction of the male member is likely to be unstable, and the connecting operation in the hand scrubbing state is difficult.

Further, the latter one provided with the anti-sway coupling piece requires a thin wall-shaped coupling piece in the tubular portion of the female member, and the male member has a delicate linear strip between the pair of insertion arms. Since the body is required, the structures of the molding dies for the female member and the male member are complicated, and the durability of the dies may be reduced. In addition, when the pair of insertion arms are pressed from both sides during separation, the pressing force pinches the connecting piece via the linear body, which serves as resistance against the withdrawal of the male member, resulting in a light separation. There was a problem that I could not.

The present invention has been made in view of the above, and an object of the present invention is to easily and smoothly perform connection and disconnection operations, and to simply configure a molding die. The aim is to provide a plastic guideless buckle that can be made.

[0009]

The present invention has been made to achieve the above object, and a plastic guideless buckle according to the first invention is a pair of flexible arms having a pressing body and an engaging portion. A male member having a central arm provided in the center between the pair of flexible arms and extending in the insertion axis direction, and a tubular portion capable of accommodating the pair of flexible arms and the central arm. A receiver that is provided with a pair of window portions that open to opposite side walls of the tubular portion and that have engaging edges that can engage with the engaging portion, and that projects from the belt connecting portion side in the tubular portion in the insertion axis direction. A holding member into which the distal end portion of the central arm of the male member in a connected state can be fitted, and a female member having an opening of the tubular portion. And an introduction portion formed to expand in the direction, Introducing portion, formed by inducible form the central arm to the holding portion in contact with said central arm being inserted skilled a plastic guideless buckle, characterized in that.

A plastic guideless buckle of the second invention comprises a pair of flexible arms having a pressing body and an engaging portion, and a center provided between the pair of flexible arms extending in the insertion axis direction. An engaging edge having a male member having an arm, a tubular portion capable of accommodating the pair of flexible arms and the central arm, and opening to opposite side walls of the tubular portion to engage with the engaging portion. And a female member having a receiver projecting in the insertion axial direction from the belt connecting portion side into the tubular portion, the center of the male member in a connected state. A holding portion into which the tip of the arm can be fitted, and an opening of the holding portion which is continuous with the opening portion of the holding portion are formed so as to expand and abut the central arm to be inserted so that the central arm is abutted. Introduction part that can be guided to the holding part, and the introduction part The pressing body is provided on the outside and is tapered from the belt connecting portion toward the opening, and contacts the pressing body that is bent inward in the connected state to move the pressing body toward the opening of the tubular portion. A guideless buckle made of plastic, comprising:

A plastic guideless buckle according to a third aspect of the present invention has a pair of flexible arms and a central arm extending in the insertion axis direction at the center between the pair of flexible arms. Is a pressing arm portion having an engaging end portion at the tip end and an engaging portion having an engaging portion at the tip end that is branched from an intermediate portion of the pressing arm portion and extends substantially parallel to the inside of the pressing arm portion. A male member having an arm portion, and a tubular portion capable of accommodating a part of the pair of flexible arms and a central arm, the tubular portion being provided inside a side portion of a base portion and engaging with each other. A pair of windows that have an engaging edge that can be engaged with the engaging portion, and a pair of windows that are open to the side wall facing the engaging protrusion that is engageable with the end portion; A female member having a receiver projecting in the direction of the insertion axis; A holding portion into which a tip end portion of a central arm of the male member can be fitted; and a central arm which is continuous to the outside of the opening of the holding portion and which is formed by expanding toward the opening portion of the tubular portion and inserted. A guideless buckle made of plastic, characterized by comprising: an introducing portion that abuts and guides the central arm to the holding portion.

According to a fourth aspect of the present invention, there is provided the plastic guideless buckle according to the third aspect, wherein the pressing arm portions of the pair of flexible arms are in an outward direction of a side wall of the tubular portion of the female member in a connected state. Via the through to the belt connecting portion side of the female member, the engaging end portion is engaged with the engaging protrusion, the male member and the female member are connected in a continuous plane, It is a plastic guideless buckle characterized by the above.

A plastic guideless buckle according to a fifth aspect of the present invention includes a pair of flexible arms and a central arm extending in the insertion axis direction at the center between the pair of flexible arms. Is a pressing arm portion having an extended smooth surface portion, and an engaging arm having an engaging portion at the tip end which branches from an intermediate portion of the pressing arm portion and extends substantially in parallel to the inside of the pressing arm portion. And a tubular portion capable of accommodating a part of the pair of flexible arms and a central arm, the tubular portion being provided inside a side portion of the base portion. And a pair of windows having an engaging edge capable of engaging with the engaging portion, the sliding surface portion of which is elastically contactable with the elastically contacting portion, and the inside of the tubular portion from the belt connecting portion side. A female member having a receptor projecting in the direction of the insertion axis; The holding part into which the tip end of the central arm of the male member in the state can be fitted, and the central part which is formed outside the opening of the holding part and which is expanded and formed toward the opening part of the tubular part and is inserted. An introducing portion that abuts on the arm and can guide the central arm to the holding portion, and the pressing arm portions of the pair of flexible arms are in an outward direction of a side wall of the tubular portion of the female member in a connected state. And extends to the belt connecting portion side of the female member, and the smooth surface portion of the pressing arm elastically contacts the elastic contact portion of the female member, so that the pressing arm portion and the side portion of the female member are continuous surfaces. A plastic guideless buckle, which is characterized in that the buckles are made of plastic.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 6 show a first embodiment of the present invention,
This plastic guideless buckle is a pressing body 1.
5, the male member 10 having the pair of flexible arms 14 having the engaging portion 16 and the central arm 17, and the female member 20 having the tubular portion 25 having the pair of window portions 32. The receiver 35 is provided in the structure.

The male member 10 is made of a synthetic resin material having spring elasticity, such as nylon resin. The male member 10 has a base portion 12 connected to the belt connecting portion 11 and a base portion 12 extending in parallel to the insertion axis X ₁ direction. A pair of symmetrical flexible arms 14,
A central arm 17 extending in the insertion axis X ₁ direction is formed at the center between the flexible arms 14, 14.

The flexible arm 15 is provided with a pressing body 15 whose outer end is formed in an arcuate shape, and the base 12 side of the pressing body 15 is engageable with an engaging edge 33 described later. Part 1
6 are formed. The tip of the pressing body 15 is elastically abuttable on the inside of the side portion 23 of the female member 20.
5a are formed. The length from the engaging portion 16 to the tip of the tip portion 15a, that is, the length L of the pressing body 15
₁ (see FIG. 1) is formed longer than the length L ₂ of the window portion 32.

The central arm 17 has a semicircular tip portion 17.
The guide portion 1 having a and formed in a wedge shape projecting from the base portion 12, and extending toward the insertion axis X ₁ toward the base portion 12.
8, 18 are protrudingly provided. The length of the central arm 17 is preferably set to be approximately the same as the length of the flexible arm 14 or slightly longer.

The female member 20 is made of the same nylon resin as the male member 10, and is a base portion 2 connected to the belt connecting portion 21.
2, a tubular portion 25 extending in the insertion axis X ₂ direction is continuously provided,
The side walls 27, 27 are formed with a pair of windows 32.

The tubular portion 25 includes a wide face wall 26 facing each other,
26 and side walls 27, 27 whose inner surface faces the opening 28 in a divergent manner toward the opening 28. The opening 28 is formed so that the base portion 12 of the male member 10 can be fitted therein, and inside the surface walls 26, 26 of the opening 28, guide grooves 30, 30 that can be fitted into the guide portion 18 are provided, respectively. .

On the side of the bases 22 of the side walls 27, 27, the window portion 3 penetrating outward (outside in the direction orthogonal to the insertion axis X ₂ ).
2, 32 are provided so as to face each other, and the window portion 3 of the side wall 27 is provided.
The 2 side edge forms the engagement edge 33 with which the engagement portion 16 of the male member 10 to be inserted can engage, and the edge portion of the side portion 23 of the base portion 22 on the side of the window portion 32 forms the window edge 34. ing. In addition, the tubular portion 2
5 is provided with a receptor 35 having a symmetrical shape with the insertion axis X ₂ as an axis while protruding in the insertion axis X ₂ direction from the base 22 side.

Receptor 35, in this embodiment, is base 22.
The holding portion 36 provided on the side and extending in parallel or in a taper shape along the insertion axis X ₂ , and a curved surface shape which is continuous with the opening of the holding portion 36 and expands symmetrically toward the opening 28. Of the introduction portion 37, and slidable contact portions 38, 38 provided on the outer side of the introduction portion 37 and having a tapered front surface from the base portion 22 toward the tip portion 37a of the introduction portion 37. The introduction portion 37 may be a linear inclined surface, and the sliding contact portion 38
May be formed in a curved shape. Further, the receptor 35 may be composed of a holding part 36 and an introducing part 37. Further, reference numeral 39 is a reinforcing rib, and 40 is a belt.

In the plastic guideless 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 14, 14 are opened from the opening 28 to the tubular portion 25. Inserted inside and connected.

At this time, when the insertion axis X ₁ of the male member 10 is obliquely inserted with respect to the insertion axis X ₂ of the female member 20, one flexible arm 14 deeply enters the tubular portion 25, The other flexible arm 14 enters shallowly. Therefore, one flexible arm 14 near the base 12 abuts on one side wall 27, and the other flexible arm 14 near the tip 15 a approaches the other side wall 27.
Contact the inner surface. The central arm 17 is slanted with respect to the insertion axis X ₂ , and the front end portion 17 a has a front end portion 37 of the receptor 35.
It reaches the front surface between a and 37a (see FIG. 4).

When the male member 10 is further inserted, the distal end portion 17a of the central arm 17 comes into contact with the curved surface of the introduction portion 37 and the insertion force causes the distal end portion 17a to move in the direction of the holding portion 36 while slidingly contacting the introduction portion 37. . With the movement, the oblique angle of the insertion axis X ₁ of the male member 10 with respect to the insertion axis X ₂ of the female member 20 is gradually reduced until finally the insertion axes X _{1,2 of the} both become substantially the same. Then, the tip portion 17a is fitted into the holding portion 36, and subsequently, the engaging portion 16 of the flexible arm 14 is engaged with the engaging edge 33.

Further, as the insertion progresses, the flexible arm 1
The pressing body 15 of 4 contacts the inner peripheral wall of the side wall 27, both flexible arms 14 are elastically bent inward, and when the engaging portion 16 passes the engaging edge 33, both flexible arms 14 are held by the bending. The elastic force that has been applied spreads outward and enters the engaged state. In addition, in the experiment according to the present embodiment, it was confirmed that the oblique insertion of the male member 10 was corrected by correcting the oblique insertion angle of about 30 degrees on one side to ensure smooth and proper connection.

In the connected state, the tip portion 17a of the central arm 17 is fitted in the holding portion 36, and the guide portions 18, 18 are fitted in the guide grooves 30, 30. In addition, the flexible arm 14
The tip end portion 15a of the female member 20 elastically abuts on the inner surface of the side wall 23 of the female member 20 at the window edge 34. As a result, the outer circumferences of the male member 10 and the female member 20 in the connected state have a smooth shape with no steps or grooves (see FIG. 5), prevent the cloth piece, the fishing line, etc. from being caught, and the flexible arm 14 is It is prevented from being pulled out by a piece of cloth or fishing line.

To release the connection between the two, the pressing members 15, 15 of the flexible arms 14, 14 are pressed inward (in the direction of arrow P in FIG. 6) with the thumb and forefinger. As a result, both the flexible arms 14 bend inward, the respective engaging portions 16 are moved inward, the engagement between the engaging portions 16 and the engaging edges 33 is released, and the distal ends of the flexible arms 14 are released. Contacts the sliding contact portion 38.

By this contact, the flexible arm 14 is guided by the inclined surface of the sliding contact portion 38 and moves toward the opening 28,
Resilient force is applied by the contact between the pressing bodies 15 and the inner surfaces of the side walls 27, and the male member 10 is urged in the pull-out direction and separated from the female member 20. When the pressing force is applied only to the flexible arm 14 on one side, the sliding contact portion 38 prevents the unnecessary bending of the flexible arm 14 and damages the flexible arm 14, and the male member 10 is removed from the female member 20. Prevents from coming off.

7 to 11 show a second embodiment of the present invention, which is characterized by a connecting structure by four-point engagement. In the following description, components that are the same as or equivalent to those in the above-described embodiment are given the same reference numerals, and descriptions thereof are omitted.

The male member 10 of the plastic guideless buckle of the second embodiment is provided with a pair of flexible arms 14 each formed in a bifurcated shape, and the corresponding female member 20 has an engaging edge 33, 33 and engaging protrusions 24, 24
Both are configured so as to engage at four points in the insertion axis direction.

The flexible arm 14 of the male member 10 has a base 12
From the pressing arm portion 14a having flexibility while being protruded to the insertion axis X ₁ direction, the intermediate portion in the longitudinal direction of the pressing arm portion 14a inwardly formed in a branched the insertion axis X ₁ direction An engaging arm portion 14b that extends and is shorter than the pressing arm portion 14a is formed.

The pressing arm portion 14a and the engaging arm portion 14b are both flexible, and the engaging protrusion 24 is provided at the tip of the pressing arm portion 14a.
Is formed so as to project outwardly. Further, the engaging edge 33 is provided at the tip of the engaging arm portion 14b.
An engaging portion 16 that can be engaged with is provided so as to project outward. In the illustrated example, the protrusion length of the engaging portion 16 is larger than the protrusion length of the engaging end portion 15b, but the opposite or both may be formed to have substantially the same size. In addition, the inner end of the pressing arm portion 14a and the outer end portion of the engaging arm portion 14b are connected by a thin plate-shaped or rod-shaped connecting member extending in a direction orthogonal to the insertion axis X ₁ , and the pressing arm portion 14a is connected. They may be formed so as to operate integrally by pressing.

In the female member 20, the width of the base portion 22 is equal to that of the tubular portion 2.
Engaging projections 24, 24 formed to be larger than the width of 5 and projecting in a direction orthogonal to the insertion axis X ₂ are provided on the inner sides of both side parts 23, 23. The engagement protrusion 24 is formed by a hole 24a penetrating from the belt connecting portion 21 side. The engagement protrusion 24 may be a protrusion, an engagement groove, an engagement hole, or the like formed by another configuration. Further, when the distal end portions of the pressing arm portion 14a and the engaging arm portion 14b are connected by the connecting member, the side wall 27 is provided with a groove for admitting the connecting member, and the surface walls 26, 26 are continuous with each other. The body is provided.

According to the plastic guideless buckle of the second embodiment, when the male member 10 is inserted, the pressing arm portion 14a advances so as to cover the outside of the side wall 27, and the engaging arm portion 14b moves to the side wall. The inside of 27 is advanced and the engaging end 1
5b and 15b and the engaging portions 16 and 16 simultaneously engage the engaging protrusions 24 and 24 and the engaging edges 33 and 33, respectively, so that the male member 10 and the female member 20 are connected at four points.

Therefore, at the time of connecting and using, the tensile strength in the separating direction between the male member 10 and the female member 20 is doubled, and an external force such as rotation and twist is applied between the two, and one flexible arm. Even when only 14 is pressed, it is possible to engage at a plurality of points and stably hold the connected state. Further, the pressing arm portion 14a is fitted into the inside of the side portion 23 with the tip end portion thereof via the outside of the side wall 27 of the tubular portion 25, and the engaging end portion 15b is engaged with the engaging protrusion 24. Therefore, a smooth continuous surface having no step or groove is formed from the belt connecting portion 11 of the male member 10 to the belt connecting portion 21 of the female member 20 (see FIG. 10). Therefore, the cloth pieces, the fishing line, and the like are prevented from being entwined with each other, so that the cloth pieces, the fishing line, and the like are prevented from being caught, and the flexible arm 14 is prevented from being pulled outward. In addition, with respect to the oblique insertion when the male member 10 is inserted, the same operation and effect as those of the first embodiment are achieved.

To release the connection, the long pressing arm portion 14a extending to the base portion 22 of the female member 20 is operated,
The engagement between the engaging end portion 15b and the engaging protrusion 24 is released by a light pressing operation force, and the branched engaging arm portions 14b move inward almost simultaneously to form an engaging portion 16. The engagement with the engagement edge 33 is released. Further, in the connected state, since the pressing arm portion 14a is positioned so as to cover the outside of the side wall 27 of the tubular portion 25, the pressing arm portion 14a can be easily operated.

12 to 16 show a third embodiment of the present invention.

The male member 10 of the plastic guideless buckle of the third embodiment is formed by forming a pair of bifurcated flexible arms 14 each having a smooth surface portion 14c, and corresponding male member 20. Is provided with the elastic contact portions 31, 31.

The flexible arm 14 of the male member 10 has a base 12
From the pressing arm portion 14a having flexibility while being protruded to the insertion axis X ₁ direction, the intermediate portion in the longitudinal direction of the pressing arm portion 14a inwardly formed in a branched the insertion axis X ₁ direction An engaging arm portion 14b that extends and is shorter than the pressing arm portion 14a is formed.

The pressing arm portion 14a is formed in a curved shape in which the central portion in the insertion axis X ₁ direction is gently projected outward, and its tip can elastically contact the elastic contact portion 31 of the female member 20. Thus, the smooth surface portion 14c is formed.

In the female member 20, the width of the base portion 22 adjacent to the belt connecting portion 21 is formed to be larger than the width of the cylindrical portion 25, and the recessed elastic contact portions 31 are formed inside the both side portions 23, 23 respectively. , 31 are provided.

According to the plastic guideless buckle of the third embodiment, when the male member 10 is inserted, the pressing arm portion 14a advances so as to cover the outside of the side wall 27, and the engaging arm portion 14b moves to the side wall. The inside of 27 is advanced to the engaging portion 1
6, 16 engage with the engaging edges 33, 33, the smooth surface portions 14c, 14c enter the inside of the side portions 23, 23, and simultaneously elastically contact the elastic contact portions 31, 31 simultaneously with the above engagement. Contact.

Therefore, a smooth continuous surface having no step or groove is formed from the belt connecting portion 11 of the male member 10 to the base portion 22 of the female member 20 and the belt connecting portion 21 (see FIG. 15). In addition, for oblique insertion when inserting the male member 10,
The same action and effect as those of the first embodiment are obtained.

To release the connection, for example, with the thumb and forefinger, the pressing arm portions 14a, 14 in the direction of arrow P in FIG.
By pressing so as to sandwich a, the engaging arm portions 14b,
14b moves inward to engage the engaging portions 16 and 16 with the engaging edge 3
The engagement with 3, 33 is released.

At this time, the pressing arms 14a, 14a bend inward, and the elastic force of the flexible arms 14, 14 acts to move the male member 10 in the pulling-out direction. This elastic force continuously acts between the pressing thumb and forefinger and the smooth surface portions 14c, 14c, and the male member 10 is urged in the pulling-out direction to be ejected and separated from the female member 20. To be done.

[0047]

As described above, according to the plastic guideless buckle of the present invention, since the male member is provided with the central arm and the corresponding female member is provided with the receiving body, the male member is inserted obliquely. It is possible to correct the insertion posture of the members by the receptor and to connect the members in an appropriate insertion posture, and it is possible to connect smoothly and accurately even when connecting by hand or when connecting in a hurry.

When releasing the buckle connection,
Since the flexible arm contacts the sliding contact portion of the receiver and is guided in the pulling-out direction, the male member can be separated lightly and smoothly. In addition, the sliding contact portion prevents the flexible arm from flexing more than necessary, preventing damage to the flexible arm and preventing the buckle from being separated by pressing only one side.

Further, unlike the conventional example, it is possible to omit the formation of a long guide groove longitudinally cutting through the tubular portion of the female member, or a wall-shaped anti-sway coupling piece and a corresponding linear member on the male member side. Simplify the structure of the buckle, simplify the structure of the mold for molding them, reduce the mold cost, and
The durability of the mold can be improved.

Further, since the flexible arm is provided with the pressing arm portion and the engaging arm portion and the male member and the female member are engaged at four points, the tensile strength of the buckle in the separating direction can be doubled. Even if an external force such as rotation or twist is applied to the buckle at the time of connection or one of the flexible arms is pressed, the connected state can be stably maintained. Further, the long pressing arm portion can be operated to release the engagement between the pressing arm portion and the engaging arm portion, and the connection can be released easily with a small operation force.

Further, the buckle in the connected state is brought into contact with the wearer by contacting the tip portion of the flexible arm with the inner surface of the side portion of the female member on the side of the belt connecting portion. It is possible to reduce the discomfort caused by wearing and prevent the cloth piece, the fishing line, etc. from being caught. Furthermore, it is possible to prevent the flexible arm from being pulled outward and broken due to the bite, and moreover, since the flexible arm covers the side wall of the cylindrical body from the outside, a double side wall structure is provided. It is effective in being able to endure a large external force applied to the tubular body when configured.

Further, according to the plastic guideless buckle of the fifth aspect, in addition to the above effect, when releasing the connection, the male member is smoothly ejected and separated.

[Brief description of drawings]

FIG. 1 is a front view of a plastic guideless buckle according to a first embodiment of the present invention in a detached state.

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

3 is a front sectional view of the female member of FIG.

FIG. 4 is a front view showing the process of connecting the buckles in the first embodiment.

FIG. 5 is a partially cutaway front view showing the connected state of the buckle.

FIG. 6 is a partially cutaway front view showing the operation of releasing the connection of the buckle.

FIG. 7 is a front view of the plastic guideless buckle according to the second embodiment of the present invention in a detached state.

FIG. 8 is a side view of the male member of FIG.

9 is a front cross-sectional view of the female member of FIG.

FIG. 10 is a partially cutaway front view showing a connected state of the buckle in the second embodiment.

FIG. 11 is a partially cutaway front view showing the operation of releasing the connection of the buckle.

FIG. 12 is a front view of a plastic guideless buckle according to a third embodiment of the present invention in a detached state.

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

14 is a front sectional view of the female member shown in FIG.

FIG. 15 is a partially cutaway front view showing a connected state of the buckle in the third embodiment.

FIG. 16 is a partially cutaway front view showing the operation of releasing the connection of the buckle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Male member 14 Flexible arm 14a Pressing arm part 14b Engaging arm part 14c Sliding surface part 15 Pressing body 15a Tip part 15b Engaging end part 16 Engaging part 17 Central arm 20 Female member 23 Side part 24 Engaging protrusion part 25 Tube Shaped part 27 Side wall 31 Elastic contact part 32 Window part 33 Engaging edge 34 Window edge 35 Receptor 36 Holding part 37 Introducing part 38 Sliding contact part

Front Page Continuation (72) Masako Araki Inventor Masako Araki 1-415, Otayama, Midori-ku, Aichi Prefecture, No. 103, Shatre Midorigaoka 103 (72) Inventor Keiji Minowa 4455 Nakanoho, Mugi-cho, Mugi-gun, Gifu Prefecture

Claims (5)

[Claims] 1. A male member having a pair of flexible arms having a pressing body and an engaging portion, the male member having a central arm extending in the insertion axis direction at the center between the pair of flexible arms; A belt coupling having a tubular portion capable of accommodating the flexible arm and the central arm, and a pair of window portions having an engaging edge that is open to the opposite side walls of the tubular portion and is engageable with the engaging portion. A holding member into which the distal end portion of the central arm of the male member in a connected state can be fitted. And an introducing portion that is continuous with the opening of the holding portion and is formed to expand toward the opening of the tubular portion, the introducing portion contacting the central arm to be inserted, and the central arm. Is formed so that it can be guided to the holding portion. Plastic-made guide-less buckle. 2. A male member having a pair of flexible arms having a pressing body and an engaging portion and having a central arm extending in the insertion axis direction at the center between the pair of flexible arms; A belt coupling having a tubular portion capable of accommodating the flexible arm and the central arm, and a pair of window portions having an engaging edge that is open to the opposite side walls of the tubular portion and is engageable with the engaging portion. A holding member into which the distal end portion of the central arm of the male member in a connected state can be fitted. And an introduction part that is formed to expand in the opening direction of the tubular part and that is continuous with the opening of the holding part, and is in contact with the inserted central arm to guide the central arm to the holding part. It is provided outside the introduction part and is connected to the belt connecting part. A slidable contact portion which is formed to be tapered toward the opening portion and abuts on the pressing body that is bent inward in a connected state to guide the pressing body toward the opening portion of the tubular portion. A plastic guideless buckle characterized by: 3. A pair of flexible arms and a central arm extending in the insertion axis direction at the center between the pair of flexible arms, wherein the flexible arm has an engaging end portion at a tip end portion. A male member having a pressing arm portion and an engaging arm portion branched from an intermediate portion of the pressing arm portion and extending substantially parallel to the inner side of the pressing arm portion and having an engaging portion at the tip end portion, There is a cylindrical portion capable of accommodating a part of the pair of flexible arms and a central arm, and the cylindrical portion is provided inside a side portion of the base portion and is capable of engaging with the engaging end portion. And a pair of windows having an engaging edge capable of engaging with the engaging portion and opening in a side wall facing the portion, and the receiving body protruding in the insertion axis direction from the belt connecting portion side into the tubular portion. A female member having an end portion of the central arm of the male member in the connected state, and Section and a portion that is continuous with the outside of the opening of the holding portion and expands toward the opening portion of the tubular portion, abuts the central arm to be inserted, and the central arm can be guided to the holding portion. A guideless buckle made of plastic, characterized by comprising an introduction part. 4. The plastic guideless buckle according to claim 3, wherein the pressing arm portions of the pair of flexible arms are connected to each other via the outside of the side wall of the tubular portion of the female member. The male member and the female member are connected to each other in a continuous plane while extending to the belt connecting portion side of the female member and engaging the engaging end portion with the engaging protrusion. Plastic guideless buckle. 5. A pair of flexible arms and a central arm extending in the insertion axis direction at the center between the pair of flexible arms, the flexible arm having an extended smooth surface portion. A male member provided with a pressing arm portion and an engaging arm portion branched from an intermediate portion of the pressing arm portion and extending substantially inward of the pressing arm portion and having an engaging portion at a tip end portion thereof; An elastic contact having a cylindrical portion capable of accommodating a part of the pair of flexible arms and the central arm, wherein the cylindrical portion is provided inside the side portion of the base portion and the smooth surface portion of the pressing arm portion can elastically contact. And a pair of windows having an engaging edge capable of engaging with the engaging portion and opening in a side wall facing the portion, and the receiving body protruding in the insertion axis direction from the belt connecting portion side into the tubular portion. A female member having a front end portion of the central arm of the male member in a coupled state, the female member having And a holding part that is continuous to the outside of the opening of the holding part and expands toward the opening of the tubular part, and contacts the inserted central arm to guide the central arm to the holding part. A pair of flexible arms, wherein the pressing arms of the pair of flexible arms extend to the belt connecting portion side of the female member via the outside of the side wall of the tubular portion of the female member in the connected state. At the same time, the smooth surface portion of the pressing arm elastically contacts the elastic contact portion of the female member, and the pressing arm portion and the side portion of the female member are connected in a continuous plane shape. Guideless buckle.