JPH1042917A - Cord stopper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cord stopper having improved safety, eliminating a defective action due to burrs, and having the quality excellent in durability including dry cleaning (using a petroleum or perchloric chemical) by using a soft urethane material considered unsuitable for the mass production of the cord stoppers in the past because it easily generates burrs and it is small-sized. SOLUTION: This cord stopper is constituted of a coil spring 3 stored in a cylindrical main body 1 and a piston-like action body 2 slidably inserted into the main body 1 to press the coil spring 3, and a main body side cord through hole 6 and an action body side cord through hole 7 are provided on the main body 1 and the action body 2 respectively. A soft urethane material is used as the constituting material, and planes 9 perpendicular to the center lines of the cord through holes 6, 7 and parallel with the main body axis are formed at the slide sections where the main body 1 and the action body 2 are coupled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a strap stopper, and more particularly to a small strap stopper used for adjusting a strap attached to clothes, bags, bags, hats and the like. Things.

[0002]

2. Description of the Related Art Conventionally, as disclosed in, for example, Japanese Utility Model Publication No. 57-46808 and Japanese Utility Model Application Laid-Open No. 2-52608, a string stopper is a locking device for adjusting a string to an arbitrary position. Is
As shown in FIG. 4, a cylindrical main body (1)
A coil spring (3) built in the main body (1) and fixed at both ends by a main body side spring fixing portion (15) and an operating body side spring fixing portion (16), and a piston having a circular cross section for pressing the coil spring (3). And an operating body (2) provided with a protrusion (12) for preventing the operating body from coming off.The operating body (2) is pushed into the main body (1) by compressing the coil spring (3) while pressing the operating body (2). The string (8) is moved by moving the string (8) by aligning the body side string passage hole (6) provided and the operation body side string passage hole (7) drilled in the operation body (2). After adjusting the length, release the operating body (2) and use the return force of the coil spring (3) to operate the piston-shaped operating body.
(2) is pushed outward, the main body side string through hole (6) drilled in the main body (1) and the operating body side string through hole drilled in the operating body (2)
The position of (7) is shifted, and the mechanism for fixing the string (8) is characterized.

[0003] The above-mentioned conventional strap fasteners are made of a hard material using nylon, polyethylene or the like, or a styrene, olefin or polyester material.

[0004]

The above-described cord stopper made of a material such as nylon or polyethylene has a string adjusting function, but if it is used in a state where it is easily contacted by other objects, the cord stopper is required. Due to the high hardness of the material, there is a problem in that, for example, when it is mounted on a person or an object, the painted surface of a car is damaged. For the purpose of overcoming these drawbacks, experimental studies were conducted on soft elastomers (hardness of 60 to 95 degrees A), styrene, olefin, and polyester materials. However, in each case, the deterioration was caused by dry cleaning.

[0005] Thus, when a trial production was conducted with a focus on a soft urethane-based material, it was soft and hardly damaged other objects.
Deterioration during dry cleaning could be eliminated, but since soft urethane-based materials have high fluidity, burrs are likely to occur with the structure of the conventional strap fastener, and although burrs formed on the outer surface can be easily removed, In addition, it is extremely difficult to remove burrs formed on the sliding portion inside the small diameter, and if the burrs remain on the sliding portion, the function of the string stopper is disturbed, and sufficient quality as a product cannot be secured. Therefore, it was not suitable for use.

[0006]

In order to solve the above-mentioned problems, the present invention uses a soft urethane-based material as a material,
(1) In order to prevent burrs from being generated by the soft urethane-based material having a high fluidity, a string stopper main body (1) and an operating body
A plane (9) perpendicular to the center line of the string passing hole and parallel to the axis of the main body is formed on each sliding portion to be fitted in (2).

[0007]

DETAILED DESCRIPTION OF THE INVENTION AND

【Example】

(Example) Next, an example of the cord stopper according to the present invention will be described. As shown in FIG. 1, the structural features of this embodiment are as follows.
A plane (9) perpendicular to the center line of the threading hole and parallel to the axis of the main body is formed in each sliding portion where the main body (1) and the operating body (2) are fitted. FIG. 2 is an explanatory view of a conventional mold touch surface, and FIG. 3 is an explanatory view of a mold touch at the time of molding the main body according to the present invention. In either case, the main body (1) is basically formed by the main body fitting hole forming pin (4) and the outer shape of the mold.Here, the main body side string through hole (6) of the main body (1) is formed simultaneously. To this end, resin molding is performed in a state where the pin (5) for forming the cord through hole on the main body side is pressed against the pin (4) for forming the main body fitting hole. At this time, as shown in FIG. 2, the touch surface (referred to as the surface shape of the end surface of the cylindrical body contacting the cylindrical peripheral surface) serving as a contact portion between the two pins is changed from the conventional complicated hyperboloid (10) to FIG. By adopting the plane circular shape (14) shown in (1), accuracy can be easily improved, and burr generation can be prevented. Furthermore, in this embodiment, in order to facilitate insertion of the operating body (2) during assembly, a notch (11) for inserting the operating body is provided at an edge of the main body side fitting hole (13) of the main body (1). Provided. The soft urethane-based material used in this example had a hardness of 60 to 95 degrees A hardness.

[0008]

According to the present invention, the use of a soft urethane-based material having a high fluidity tends to generate burrs and is not suitable for mass production. In each of the sliding portions where the (1) and the operating body (2) are fitted, a plane perpendicular to the center line of the string through hole and parallel to the body axis is formed, and as shown in FIG. In molding production, a pin for forming the main body string through hole
The touch surface of (5) and the pin (4) for forming the main body fitting hole can be made flat as shown in FIG. 3, so that the mold can be easily made with high precision, and as a result, the fluidity can be improved. Although it is a soft urethane-based material having a high hardness, it is possible to prevent the occurrence of burrs in a sliding portion where it is difficult to remove burrs, and the operation of the strap fastener does not occur, thereby achieving stable quality. Further, according to the present invention, the adoption of a soft urethane-based material enables the formation and manufacture of a soft strap fastener, without damaging other objects, and the soft urethane-based material is also excellent in chemical resistance. As a result, along with the realization of the stable quality, good durability can be obtained without deterioration even when dry cleaning (use of petroleum or perchloric chemicals) is performed. Further, according to the present invention, since the sliding surface is provided with the flat surface (9), the function of positioning the operating body (2) with respect to the main body (1) is provided so that the assembling efficiency is improved, and the circumference of the operating body (2) is improved. It is possible to provide an excellent quality cord stopper that operates smoothly without any backlash in the direction.

[Brief description of the drawings]

FIG. 1 is an exploded view of a strap stopper according to the present invention.

FIG. 2 is an explanatory view showing a touch of a main body mold of a conventional cord stopper.

FIG. 3 is an explanatory view showing a touch of a metal mold for a main body of the cord stopper of the present invention.

FIG. 4 is an exploded sectional view of a conventional cord stopper.

FIG. 5 is an explanatory cross-sectional view of a conventional string stopper with a string fixed.

FIG. 6 is an opening-side front view of a main body (1) according to the present invention.

[Explanation of symbols]

 1 Main body 2 Operating body 3 Coil spring 4 Main body fitting hole forming pin 5 Main body side string through hole forming pin 6 Main body side string through hole 7 Operating body side string through hole 8 String 9 Flat surface 10 Touch surface 11 Notch for operating body insertion 12 Protruding piece for preventing operation body removal 13 Body side fitting hole 14 Circular 15 Body side spring fixing part 16 Operation body side spring fixing part

Claims (2)

[Claims] A cylindrical body (1), a built-in coil spring (3), and a main body that presses the coil spring (3).
(1) Piston-shaped operating body slidably fitted in (2)
And a main body (1) and an operating body (2) provided with a main body side string passing hole (6) and an operating body side string passing hole (7), respectively, wherein a soft urethane-based material is used as a constituent material. make use of,
A flat surface (9) orthogonal to the center line of each of the string through holes (6) and (7) and parallel to the main body axis was formed in each sliding portion where the main body (1) and the operating body (2) fit. A string stopper characterized by the following. 2. The strap fastener according to claim 1, wherein the hardness of the soft urethane-based material as the constituent material is about 60 to 95 degrees A hardness.