JPH047770Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application> This invention relates to an improvement of a plastic buckle consisting of a separable female member and a male member, which can be used, for example, to connect elongated strips such as straps and belts. do.

<Prior Art> Conventionally, this type of buckle consists of a separable female member and a male member. The male member includes a pair of windows that open, and a collar-shaped base that abuts the opening edge of the cylindrical portion, and a flange-shaped base that extends left and right away from the front surface of the base and extends forward from the opening of the cylindrical portion. A device is known that includes a pair of left and right flexible arms that bend inward and fit in, and a stepped portion that projects outward from both flexible arms and engages with the window portion in a non-returning manner. Publication No. 54-31338,
Publication No. 57-18970).

<Problems to be Solved by the Invention> However, the buckles described in Japanese Patent Publication No. 54-31338 and Japanese Utility Model Publication No. 57-18970 mentioned above have a problem in that it is difficult to reduce their size and weight.

That is, since the flexible arms of any of the buckles are rod-shaped, they are required to have a certain degree of thickness in order to have rigidity, and it has been difficult to reduce the weight of the flexible arms.

Therefore, the present invention was devised in view of the above-mentioned problems, and its purpose is to:
The objective is to provide a buckle that can be made smaller and lighter, and that can be easily inserted and removed.

<Means for Solving the Problems> The present invention aims to achieve the above-mentioned objects, and the contents thereof will be explained below using embodiments shown in the drawings.

The present invention consists of a separable female member 2 and a male member 3, the female member 2 having a hollow cylindrical part 4 having an opening 10 at one end, and opposing side walls 8, 8 of the cylindrical part 4. The male member 3 includes a pair of windows 5, 5 opening on the outer surface of the cylindrical portion 4.
A collar-shaped base 13 that comes into contact with the cylindrical part 4, and a pair of left and right flexible arms 14, 14 that extend forwardly away from the front surface of the base and bend inwardly from the opening 10 of the cylindrical part 4. In the plastic buckle described above, each flexible arm 14 of said male member 3 has a base 13
an inner portion 15 extending obliquely outward from the front surface of the
A curved portion 16 is folded back from the tip of this inner portion 15 and curved in an outwardly bulging arc shape, and the outer surface thereof extends left and right from the opening 10 of the cylindrical portion 4 of the female member, and the length of this curved portion is It constricts inwardly from the middle of the length and forms independent left and right loops consisting of a constricted portion 17 connected to the front surface of the base, and a tail portion 18 extending rearward is formed at the rear end of the curved portion 16. The window portion 5 at the end,
5 is characterized in that a locking step portion 19 is formed which engages with the hole edge 5' in a non-returning manner, and a groove 21 is formed between the tail portion 18 and the constricted portion 17.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings. 1 is a buckle consisting of a separable female member 2 and a male member 3, and the female member 2 and the male member 3 are made of nylon or the like. Each is integrally made of highly elastic plastic.

The female member 2 includes a hollow cylindrical portion 4 having an open portion 10 at one end into which the male member 3 can be inserted, and a pair of window portions 5, 5 opening on the outer surfaces of opposing side walls of the cylindrical portion 4. A ring-shaped fastening part 6 is provided at the end of the cylindrical part 4 to which a strap, belt, etc. can be passed and fastened.

The cylindrical portion 4 is a vertically flat box formed of wide upper and lower walls 7, 7, narrow left and right side walls 8, 8, and a rear wall 9 that closes the other end of the cylindrical portion 4. A housing space 11 that has a shape and can accommodate the male member 3 therein.
form. Then, in the left and right side walls 8, 8, a window 5 is formed by making a large cut into the upper and lower walls 7, 7, and a partition wall 12 is provided that extends halfway from the inner surface of the rear wall 9 toward the opening 10. Accommodation space 11
It is divided into left and right.

The male member 3 also includes a collar-shaped base 13 that abuts the periphery of the opening 10 of the cylindrical portion 4, and a collar-shaped base 13 that extends left and right away from the side surface of the base 13, and that
It comprises a pair of left and right flexible arms 14, 14 that bend inwardly and fit into each other.

The flexible arm 14 is made by curving a long and thin wire material into a loop shape, and includes an inner portion 15 extending obliquely outward from the side surface of the base 13, and an inner portion 15 that is folded back from the tip of the inner portion 15 and swells outward to form an arc shape. curved,
A curved portion 16 whose outer side protrudes laterally to a greater extent than the width of the opening 10 of the cylindrical portion 4;
The base 13 extends inwardly from the middle of the length.
It is composed of a constricted portion 17 that continues on the side surface.
and a tail portion 18 extending from the rear end of the curved portion 16.
is formed with an outward locking step 19 that engages with the edge of the window 5 in a non-returning manner.
A groove 21 is formed between the groove 7 and the groove 7. Incidentally, the base 13 has a ring shape that is long from side to side, and is designed to be fastened through a strap, belt, etc.

In order to connect the female member 2 and the male member 3 described above, the flexible arm 14 of the male member 3 is simply inserted into the cylindrical portion 4 of the female member 2, and the connection can be ensured.

That is, the flexible arm 14 is connected to the opening 10 of the cylindrical portion 4.
When the flexible arms 14 are inserted in the same direction, the outsides of the curved portions 16 of the flexible arms 14 come into contact with the periphery of the opening 10 of the cylindrical part 4, and when pushed further, the flexible arms 14 gradually move inward from the proximal ends of each other. It passes while bending. At this time, the flexible arm 14 itself is also slightly flattened,
The insertion force of the flexible arm 14 is reduced.

When the curved portion 16 of the flexible arm 14 reaches the window 5, the flexible arm 14 expands outward due to its elastic force, and the curved portion 16 of the flexible arm 14 expands outward due to its elastic force.
6 is fitted into the window part 5, and the locking step part 19 formed at the rear end is forcefully snapped onto the hole edge 5' of the window part 5, that is, the inner surface of the side wall 8, and the flexible arm 14 is attached to the cylindrical part. It is restrained in the accommodation space 11 of No. 4 so that it cannot be reversed.

Therefore, when the flexible arms 14, 14 of the male member are pulled in the direction in which they are removed from the female member 2 by the band-like materials 20, 20, such as straps or bands, fixed to the female member 2 and the male member 3, respectively, Flexible arm 14
Since the tail portion 18 of the tail portion 18 is slightly bent toward the constriction portion 17, the outward locking step portion 19 provided on the tail portion 18 digs deeper into the hole edge of the window portion 5 and resists.

On the other hand, in order to release the connection between the two, insert your fingers through the window 5 of the cylindrical portion 4 and pinch the curved portions 16 of both flexible arms 14 inward from both sides to bend them.

That is, when the curved portion 16 of the flexible arm 14 is bent inward, the locking step portion 19 separates from the hole edge 5' of the window portion 5, and the flexible arm 14 is pushed out a little toward the opening 10. As a result, the outside of the curved portion 16 comes into elastic contact with the inner surface of the side wall 8 of the cylindrical portion 4. At this time, since the outside of the curved portion 16 is inclined downward toward the tip of the flexible arm 14, when the elastic restoring force of the flexible arm acts, a force that pushes the flexible arm 14 toward the opening 10 is generated. occurs. Therefore, the flexible arm 14 returns to its original state due to the elastic force and comes out of the opening 10 of the cylindrical portion 4, and the female member 2
and the male member 3 is separated.

In the illustrated embodiment, the housing space 11 of the cylindrical portion 4 is divided into left and right sides by the partition wall 12, so that when the flexible arm 14 is bent inward, the inner side of the flexible arm 14 The portion 15 comes into contact with the partition wall 12, which not only prevents the flexible arm 14 from bending inward more than necessary, but also allows it to bend equally on the left and right sides.

Furthermore, even when they are separated from each other, the flexible arms 14 of the male member 3 have a loop-shaped curved shape, so that they are difficult to break due to external force. When pushed, the inner surfaces of the inner portions 15 of the flexible arms 14 come into close contact with each other, and when the flexible arms 14 are pulled outward, the flexible arms 14 themselves deform and their tails 18 tips comes into contact with the outer surface of the constricted portion 17, and the flexible arm 14 is not bent more than necessary.

<Effects of the invention> As explained above, according to the invention, each flexible arm forms an independent hollow loop, and the constricted portion acts as a spring, so even if the overall length of the flexible arm is short, it can be It is possible to provide a small and lightweight buckle with excellent rigidity and elasticity.

Furthermore, a rearwardly extending tail portion 18 is formed at the rear end of the curved portion 16 of each flexible arm 14, and a locking stage is provided at the rear end of the tail portion for non-returning engagement with the hole edge 5' of the window portion 5. A groove 21 is formed between the tail portion 18 and the constricted portion 17. This groove 2
1 allows the tail portion 18 to easily bend toward the constriction portion 17. This involves inserting the pair of flexible arms 14, 14 of the male member into the cylindrical part 4 of the female member through the opening 10 of the cylindrical part 4, and inserting the locking step 19 at the tail into the cylindrical part 4 of the female member. Hole edge 5' of section 5
It is possible to easily connect the female and male members by locking the female and male members into the connected state without requiring much force, and to release the connected state, the curved portion 16 is pushed through the window and the locking step at the tail is used. This means that removing the portion 19 from the hole edge 5' of the window portion 5 can be done easily without requiring much force.

The constricted portion 17 not only connects the front of the tail portion 18 of the curved portion to the base 13 of the male member to elastically support the curved portion, but also applies excessive force to the curved portion 16 to remove the connection state. When an attempt is made to push in the free end of the tail portion 18, the free end of the tail portion 18 comes into contact with the constricted portion 17, and the constricted portion has the effect of preventing the tail portion from being pushed in further and being damaged.

[Brief explanation of the drawing]

The drawings show an embodiment of the plastic buckle of the present invention, and FIG. 1 is a plan view of the connected state;
Figure 2 is a plan view of the female member, Figure 3 is a front view of the same as above, Figure 4 is a side view of the same as above, Figure 5 is a sectional view taken along the - line in Figure 3, and Figure 6 is a plane view of the male member. figure,
FIG. 7 is a front view of the same as above, and FIG. 8 is a perspective view of the device in use. DESCRIPTION OF SYMBOLS 1... Buckle, 2... Female member, 3... Male member, 4... Cylindrical part, 5... Window part, 5'... Hole edge of window part, 8... Side wall, 10... Opening part , 13...Base, 14...Flexible arm, 15...Inner portion, 1
6... Curved portion, 17... Narrow portion, 18... Tail portion, 19... Locking stepped portion, 21... Groove.

Claims (1)

[Claims for Utility Model Registration] Consisting of a separable female member 2 and a male member 3, the female member 2 has a hollow cylindrical portion 4 having an opening 10 at one end, and an opposing portion of the cylindrical portion 4. The male member 3 includes a pair of windows 5, 5 opening on the outer surfaces of the side walls 8, 8, and the male member 3 has a brim-shaped base 13 that abuts the opening 10 of the cylindrical part 4, and a flange-shaped base 13 that extends from the front surface of the base to the left and right. A pair of left and right flexible arms 1 extend forward apart from each other and are bent inwardly and fitted into the opening 10 of the cylindrical portion 4.
4, 14, each flexible arm 14 of said male member 3 has a base 13
an inner portion 15 extending diagonally outward from the front surface of the
A curved part 16 is folded back from the tip of this inner part 15 and curved in an outwardly bulging arc shape, and the outer surface thereof extends left and right from the opening 10 of the cylindrical part 4 of the female member, and the length of this curved part is It constricts inward from the middle of the length and forms independent left and right loops consisting of a constricted portion 17 connected to the front surface of the base, and a tail portion 18 extending rearward is formed at the rear end of the curved portion 16. The window portion 5 at the end,
5. A plastic buckle characterized in that a locking step 19 is formed which engages with the hole edge 5' of the plastic buckle in a non-returning manner, and a groove 21 is formed between the tail portion 18 and the constricted portion 17.