JPH0542729Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a synthetic resin buckle used for safety seat belts for baby carriages, hanging bands for clothes, etc.

(Prior Art) Generally, baby carriage safety seat belts and clothing slings use fasteners in which a rod-shaped clasp supported by a ring is fastened to holes drilled at equal intervals in the belt, or a backing in which a plug is inserted into a socket to lock it.
Recently, the latter type of lock has become more popular because it is easier to lock and release and provides a more reliable lock.

The configuration of this buckle is as shown in FIG. 4 (Japanese Utility Model Application No. 61-113611), which includes a mounting ring having a belt passage hole 3a at one end of the socket body 2 in which a locking cavity 1 is formed. 4a, a plug insertion opening 5 is formed at the other end, and an operating body 7 having a locking protrusion 6 protruding from the locking cavity 1 of the socket body 2 is operated by the spring pieces 8a and 8b. A socket body A is pivotally engaged so as to swing against the force.
and a plug body B formed integrally with a mounting ring 4b having a belt passage hole 3b, and an insertion plug 10 having a locking hole 9, which is inserted into the locking cavity 1 from the insertion plug insertion opening 5. plug 1
The locking protrusion 6 of the operating body 7 is engaged with the locking hole 9 of the operating body 7, and the rear end of the operating body 7 can be pressed in the direction of the arrow with a fingertip against the spring pieces 8a and 8b. This releases the engagement between the locking protrusion 6 and the locking hole 9.

Furthermore, Japanese Utility Model Application Publication No. 61-28416 discloses a device in which a malfunction prevention wall is formed between the lock chamber and the belt passage hole in order to prevent malfunction of the operating body.

(Problem to be solved by the invention) However, the former synthetic resin buckle mentioned above,
Since the spring pieces 8a and 8b provide elasticity, there is a high chance that one of them will break, and not only will the locking function be lost early due to breakage, but also the spring piece 8b will protrude to the back side in the locked state. Since the back of the buckle is horizontal, when the buckle is placed along the body, local pressure is applied to the body, making it uncomfortable to use, and the spring piece 8b is easily caught on other objects and broken. Like the latter, the back of the buckle is horizontal, so the buckle does not follow the body and puts local pressure on the body, making it uncomfortable to use. I have an assignment.

The object of the present invention is to provide a synthetic resin buckle that improves durability by reducing the chances of breakage of the spring pieces, and also fits well to the body and does not make the buckle feel uncomfortable when worn.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a mounting ring having a belt passage hole through a malfunction prevention wall at one end of the socket body in which a locking chamber is formed. A plug insertion opening is formed at the other end, and an operating body with a protruding locking protrusion is pivotably engaged in the locking cavity of the socket body so as to swing against the elastic force. The plug body is made up of a socket body with a locking hole, and a plug body with a locking hole formed integrally with a mounting ring having a belt passage hole, and the plug body is inserted into the locking cavity from the plug insertion opening. In a buckle adapted to engage the locking protrusion of the operating body into the locking hole of the plug, a spring piece whose free end protrudes into the locking cavity is attached to the bottom of the locking cavity on the operating side of the operating body. It is formed integrally and is provided on the back surface of the operation body at a position corresponding to the spring piece so as to protrude so as to come into contact with the free end of the spring piece in a locked state, and when the socket body and plug body are connected, The main feature of the buckle is a synthetic resin buckle whose bottom part is formed into an arc with a large radius of curvature along the connection direction.

(Example) Next, an example of the buckle of the present invention will be described below based on the drawings.

FIG. 1 is an exploded plan view of the buckle according to the present invention.
FIG. 2 is a sectional view showing the socket body A and plug body B separated, and FIG. 3 is a sectional view showing the locked state. As shown in FIGS. It consists of a plug body B.

First, to explain the socket body A, this socket body A is a combination of a socket body 2 molded using a synthetic resin material and an operating body 7, and the socket body 2 has a locking cavity 1 in the center. A bottom 11 integrally formed with an inwardly protruding spring piece 8 and having a large radius R (approximately 250 mm) on the bottom surface, and side walls 13 erected on both sides of the bottom 11 and having a horizontal shaft hole 12. , a front wall 1 with a plug insertion opening 5
4. Each wall of the erroneous operation prevention wall 15 facing the front wall 14 forms an upwardly opening locking cavity 1;
A receiving stage 14a is formed on the inside of the front wall 14, and a mounting ring 4a having a belt passage hole 3a is provided on the outside of the erroneous operation prevention wall 15. It has a shape that fits into the opening of the locking cavity 1, and a swing center shaft 16 that is fitted and supported in the horizontal shaft hole 12 of the side wall 13 of the socket body 2 is provided on both sides to protrude in the horizontal direction. death,
A locking protrusion 6 having an insertion guide wall 6a is provided protrudingly on the lower surface of the swinging side closer to the front wall 14 than the swinging center axis 16, and the operation side is closer to the misoperation prevention wall 15 than the swinging center axis 16. On the lower surface, bottom 11
A spring pressing protrusion 17 is provided in a protruding manner at a position corresponding to the spring piece 8, and a spherical operating portion 18 is slightly bulged on the upper surface of the operating side. It is assembled by fitting and supporting the swing center shaft 16 of the operating body 7 into the horizontal shaft hole 12 by utilizing the elasticity of the synthetic resin possessed by the operating body 7.

Next, the plug body B will be explained. It is integrally molded from a synthetic resin material, and has an insertion plug 10 with a locking hole 9 into which the locking protrusion 6 fits, and a belt passage hole 3b. It is formed integrally with the mounting ring 4b, and has a large radius R on the lower edge of the mounting ring 4b.

The connection between socket body A and plug body B is as follows:
When the plug 10 of the plug body B is moved in the direction of the arrow and inserted into the plug insertion opening 5 of the socket body A, the tip of the plug 10 supports the locking protrusion 6 with the pivot axis 16 as a fulcrum. Then, when the operating body 7 is lifted against the spring piece 8 and swung, and the insertion plug 10 is further pushed in so that the locking hole 9 reaches below the locking protrusion 6, the operating body 7 is moved by the restoring force of the spring piece 8. to return to the original state, and the locking protrusion 6 is inserted into the locking hole 9.
This is done by locking to the

In addition, when manually releasing the socket body A and the plug body B, as shown in FIG. When the operating body 7 is brought into contact with the spring piece 8 and a pressing force is applied against the spring piece 8, the operating body 7 swings about its swing center axis 16, and the locking protrusion 6 comes to escape from the locking hole 9. ,
It is only necessary to pull out the plug body B in this state.

Since the spring piece 8 has its free end protruding into the locking cavity 1, even when pressed, it effectively exerts elastic force without protruding to the back surface of the socket body 2, and does not protrude to the back surface. There will be no problems such as catching or breakage of the spring piece 8, which would otherwise occur.

The buckle according to the present invention configured as described above connects the free ends of the belts C, each of which has one end fixed, to the belts of the attachment rings 4a and 4b, as shown by the two-dot chain line in FIG. Through holes 3a, 3b
It is used to disconnect the belts from each other by attaching them to the vehicle, and is mainly used as a safety seat belt for baby carriages. In this case, the arcs of large radius of curvature formed on the bottom surfaces of the socket body A and the plug body B will follow the torso of the body.

(Operation and Effect of the Invention) As explained above, the buckle of the present invention has a spring pressing projection protruding from the back surface of the operating body, and a free end extending from the bottom of the locking cavity. Because it is based on a spring piece raised into the locking chamber, the spring piece protrudes from the back surface and applies local pressure to the body during operation, unlike in the conventional case.
This eliminates the problem of spring pieces breaking due to catching on other objects, and since there is no need for two spring forming parts like in the past, there is less chance of loss of buckle function due to spring breakage, resulting in a highly durable buckle. can be provided.

In addition, since at least the bottoms of the socket body and plug body are formed into an arc with a large radius of curvature along the connection direction, the buckle conforms well to the body and does not feel uncomfortable when worn on the body as a safety belt. It is possible to achieve extremely excellent practical effects such as the following:

Therefore, the present invention provides a highly safe synthetic resin buckle that reduces the chances of breakage of the spring pieces and improves durability, and also conforms well to the body and does not make the buckle feel uncomfortable when worn. It is possible.

[Brief explanation of the drawing]

FIG. 1 is an exploded plan view of the buckle according to the present invention.
FIG. 2 is a sectional view of the socket body A and plug body B separated, FIG. 3 is a sectional view showing the locked state, and FIG. 4 is a sectional view of a conventional buckle. A...Socket body, B...Plug body, 1...Empty room for lock, 2...Socket body, 3a, 3b...
...Belt insertion hole, 4a, 4b...Mounting ring, 5...
Plug insertion port, 6...Lock protrusion, 7...
Operating body, 8, 8a, 8b... Spring piece, 9... Lock hole, 10... Insertion plug, 11... Bottom, 12...
...Horizontal shaft hole, 13...Side wall, 14...Front wall, 15
... Misoperation prevention wall, 16 ... Swing center axis, 17 ...
...Spring pressing protrusion, 18...Operation section.

Claims (1)

[Claims for Utility Model Registration] One end of the socket body with a locking chamber formed therein is provided with a mounting ring having a belt passage hole through an erroneous operation prevention wall, and a plug insertion opening is formed at the other end. In the locking cavity of the socket body, there is a socket body which is pivotally engaged so that an operating body with a protruding locking protrusion swings against the elastic force, and a socket body with a locking hole. The plug consists of a plug body integrally formed with a mounting ring having a belt passage hole, and the locking protrusion of the operating body is inserted into the locking hole of the plug inserted from the plug insertion opening into the locking cavity. In the buckle adapted to be engaged, a spring piece whose free end extends up into the locking cavity on the operating side of the operating body is integrally formed at the bottom of the locking cavity on the operating side of the operating body; It is protruded at a position corresponding to the spring piece so as to come into contact with the free end of the spring piece in the locked state, and when the socket body and plug body are connected, the bottom part has a large curvature radius along the connection direction. A synthetic resin buckle characterized by being formed into a circular arc.