JPH084033Y2 - Locking device for attaching the mask strap - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking tool for attaching a mask, for example, a hanging strap such as a disposable dust mask to the mask body. More specifically, the invention relates to a latch for attaching a strap of a simple mask, which allows the length of the strap to be freely adjusted by a simple operation.

[0002]

2. Description of the Related Art For a hook of a disposable dust mask, which is made of non-woven fabric having air permeability and filtration function,
Rubber bands are usually used. When this strap is attached to the mask body, conventionally, one end of the strap, which is a rubber strap, is stapled to a predetermined position of the mask body.

[0003]

In the conventional mounting method in which one end of the hanging strap is bound with staples, holes by the staples are opened in the mask main body to reduce the dustproof effect and the hanging hooks once mounted. The string has the drawback that its length cannot be changed. In view of the above-mentioned drawbacks of the prior art, the present invention does not make a hole in the mask body and allows the length of the strap to be easily and freely adjusted. It is a device that devised a fastener.

[0004]

A locking device according to the present invention comprises:
The mask 1 is composed of a substrate 1 fixed to a predetermined position on the mask body 7 by means such as sticking, and an operating ring 2 mounted on the substrate 1.
A locking piece 3 for rotatably holding the base of the operating ring 2 is provided at the base of the substrate 1, and a through hole 4 through which a strap is inserted is provided at the front end of the substrate 1 of the operating ring 2. A through hole 5 is also provided in the front portion so that a hanging string can be inserted therethrough. However, it is assumed that the through hole 5 of the actuating ring 2 is located ahead of the through hole 4 of the substrate 1 at the forward rotation position.

Further, a projecting piece 6 having elasticity is provided on a part of the actuating ring 2, and the projecting piece 6 hits the projecting portion of the substrate at an intermediate position between the rotation of the actuating ring from the base to the front. Follow the trajectory and try to overcome this with a constant force. That is, the elasticity of the protruding piece is used to configure the click mechanism.

[0006]

As shown in FIG. 5, the operating ring 2 is attached to the substrate 1 fixed at a predetermined position of the mask body in a raised state, and the hook 8 is inserted into the through hole 4 of the substrate 1 from one end to penetrate the same. The hole 4 and the front end of the substrate 1 are wound, and both ends of the hook string are penetrated through the through holes 5 of the operating ring 2 from the substrate side to the outside. In this state, when the hanging string 8 is pulled in a direction parallel to the substrate, that is, a direction in which a force is applied in a use state, a rotational force is generated in the operating ring, and when the resistance due to the elasticity of the protruding piece 6 is overcome, the protruding piece 6
Rides over a part of the board, and the operating ring shown in FIG. 6 is rotated in the direction of the board, and the attachment of the strap is completed.

[0007] With the strap attached as shown in Fig. 6,
When a force is applied to the hanging string 8 in the substrate direction (rightward or lower right direction in the drawing), that is, in the acting direction in the mounted state of the mask, the actuating ring 2 is rotated in a direction in which the working ring 2 tends to come closer to the substrate 1. Works. Due to this rotational force, the strap 8 passing through the through holes 4 and 5 is clamped between the substrate and the operating ring,
The hanging string 8 is prevented from coming off the through holes 4 and 5. on the other hand,
When the strap is pulled in the direction orthogonal to the board (upward in the drawing), the force for tightening the strap does not act between the operating ring 2 and the board 1, so that the strap 8 can slide freely and its length can be increased. The length can be adjusted to any desired length.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention of the present invention for attaching a strap to a mask will be described with reference to the accompanying drawings. FIG. 3 shows an embodiment in which the present invention is applied to a disposable dust-proof mask, which shows the strength of the waist to hold a certain shape, the breathability and the function of filtering dust of the mask main body 7. Both ends of the strap 8 made of flat rubber are attached to the left and right symmetric positions by locking tools. However, the hanging strap may be round rubber.

As shown in FIG. 4, the engaging member comprises a flat plate-shaped substrate 1 and an annular operating ring 2, and the operating ring 2 is mounted on the substrate 1 as shown in FIG. Both the substrate 1 and the actuating ring 2 can be integrally molded with a synthetic resin material having a certain elasticity. Board 1
As can be seen from FIG. 2, the surface of each of the locking members has a substantially L-shaped cross section, a rising portion 3a is substantially in the center of the substrate, and a tongue portion 3b having a constant width projects toward the base. The piece 3 is provided, and a projection 9 having a certain height is provided on the surface of the substrate immediately below the tongue piece 3b. As a result, the base end of the actuating ring 2 is rotatably held in the space surrounded by the substrate surface, the rising portion 3a of the locking piece, the tongue piece 3b of the locking piece, and the projection 9, and The actuating ring 2 becomes detachable due to the bending of the portion 3a.

A through hole 4 through which a strap, which is a flat rubber, is inserted is provided in the front portion of the substrate 1, and a small ridge 10 in the width direction is provided on the back surface of the substrate so as to approach the through hole 4.
Is provided. The flat surface portion of the back surface of the substrate 1, which is divided into the base portion and the front portion by the protrusions, is fixed to the surface of the mask body 7 with an adhesive or an adhesive tape.

On the other hand, a through hole 5 through which a strap is inserted is provided at the front end of the operating ring 2 whose base is held by the locking piece of the substrate 1. The positional relationship between the through hole 5 and the through hole 4 of the substrate is such that the through hole 5 of the actuating ring is the front when the actuating ring 2 is rotated forward, and as described in the section of the action, It is designed so that it can be tightened in use by the tension of the string. This prevents the strap from loosening or slipping out during use, and pulling the strap in a direction orthogonal to the board (upward in the drawing) allows the strap to slide freely, depending on the user. The length of the hanging strap can be adjusted. At this time, the operating ring 2 can adjust the length of the hanging cord in the use state shown in FIG. 6 without keeping the raised state shown in FIG. 5, and is used immediately after the adjustment. be able to.

Further, in the window hole 11 forming an annular shape, a protruding piece 6 having a tongue shape and thinned like a knife blade toward the tip is protruded from the tip toward the base. The projecting dimension of the projecting piece 6 is such that when the actuating ring 2 rotates about the base as shown by the chain double-dashed line in FIG. The dimension is such that it passes through a part of the protruding locking piece 3 (shoulder corner portion of the locking piece) and does not come into contact with the locking piece 3 at the forward rotation position. As a result, the operating ring constitutes a click mechanism for restricting delusion at a certain rotational position by the elasticity of the locking piece 3, and for example, the operating ring rises when the hook string is loosened,
It will prevent the strap from coming out carelessly.

[0013]

According to the latch for attaching a strap of the present invention as set forth in claim 1, the operating ring is attached to the substrate fixed to the mask main body, and the latch is attached by simply passing the strap. Since the assembly is performed, it is possible to easily attach and detach the hanging strap. In addition, the attached strap does not loosen in the direction of force application in use, and when the strap is pulled in the direction orthogonal to the board, it slides freely to easily adjust the length of the strap. can do.

Further, according to the present invention, since the use state of the hanging strap once set is held by the click mechanism by the protruding piece, the operating ring does not rotate unintentionally and the hanging strap does not accidentally come off. Further, as in the conventional case, in the method of attaching the hanging strap that binds the rubber cord by using the staple to the mask main body, there is a drawback that the hole of the staple is opened in the mask main body and the dustproof effect is impaired when it is used for the dustproof mask. However, in the present invention, the dust-proof effect is not impaired because the mask body itself does not have staple holes or attachment holes.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a locking tool according to the present invention,

2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a front view showing a state in which the locking device according to the present invention is attached to a mask.

FIG. 4 is an exploded front view showing an embodiment of a locking device according to the present invention;

FIG. 5 is a cross-sectional view showing a state before use, in which a hanging string is passed through a locking tool,

FIG. 6 is a cross-sectional view showing a usage state in which a force is applied to a hook string passed through a locking tool.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Substrate, 2 ... Operating ring, 3 ... Locking piece, 4, 5 ... Through hole, 6 ... Projecting piece, 7 ... Mask body, 8 ... Hanging string,
9 ... Protrusion.

Claims (1)

[Scope of utility model registration request] 1. A substrate 1 which is fixed to a predetermined position of a mask body 7, and an operating ring 2 which is mounted on the substrate, and a base of the substrate 1 rotatably holds a base of the operating ring 2. Stop piece 3
And a through hole 4 through which the hook 8 is inserted in the front portion of the substrate 1, and the operating ring 2 is positioned ahead of the through hole 4 of the substrate 1 in the pivoting position to the front. , A through hole 5 through which a hanging string is inserted, and a projecting piece 6 having elasticity are provided on a part of the actuating ring, and the projecting portion of the board is at an intermediate position of the projecting piece 6 from the base to the front. A locking mechanism for attaching a strap of a mask, characterized by comprising a click mechanism for overcoming a part of the above.