JPH0229684Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a magnetic catch that improves productivity by reducing the number of component parts and assembly steps.

[Conventional technology]

A conventional magnetic catch as shown in FIG. 5 is known. That is, the magnet body 2 consisting of the magnet 2A and the pair of yoke plates 2B is inserted into the case body 1 through the side plate opening 1A of the case body 1.
The tip of the yoke plate 2B is passed through the two slits 1C formed in the front plate 1B of the case body 1 to protrude from the outer surface of the front plate 1B, and the metal spring 3 is inserted into the rear of the case body 1. It is inserted between the inner surface of the plate 1D and the rear surface of the magnet 2A, and the front surface of the magnet 2A is pressed against the inner surface of the front plate 1B by the metal spring 3. Then, the case lid 4 is attached to the case body 1 and the side plate opening 1A is inserted. It is something that is blocked. The pair of yoke plates 2B are attracted to both side surfaces of the magnet 2A, and the front plate 1B prevents the magnet body 2 from coming out of the case body 1.

Moreover, when an external force is applied to the tip of the yoke plate 2B, the magnet body 2 moves backward while compressing the metal spring 3, and when the external force is removed, the magnet body 2 is moved by the restoring force of the metal spring 3. It moves forward and returns to its original position.

[Problem that the invention attempts to solve]

This prior art is composed of a case body 1, a magnet body 2, a metal spring 3, and a case lid 4, and has a large number of component parts, so it is necessary to manufacture or procure each of the component parts. This method has the disadvantage of increasing the number of parts assembly processes, or in other words, has the disadvantage of poor productivity.

[Means for solving problems]

This invention was made for the purpose of solving the problems of the prior art, and the magnetic catch of this invention has a magnet body inserted into the case body from the front opening of the case body, The rear surface of the magnet is in pressure contact with a pair of spring pieces, one end of which is fixed to the rear of the case body having a rear opening, and the other end of which projects forward. The locking means formed on the surface locks with the locking means formed on the inner surface of both side plates of the case body, and the front surface of the magnet body protrudes from the front opening of the case body. .

Hereinafter, this invention will be explained in detail based on FIGS. 1 to 4.

11 is a pair of spring pieces, one end of which is connected to the rear of the case body 1, that is, the side plate 12 of the case body 1;
13, and the other end protrudes forward.

14 is a locking means formed on the case body 1;
These are locking protrusions that protrude from the inner surfaces of the side plates 15 and 16 of the case body 1.

Reference numeral 17 denotes a screw fixing portion, which has an L-shaped vertical cross section and is provided protruding from the outer surface of the side plates 12 and 13 of the case body 1. The screwed part 17 is composed of an extension part 17' that is on the same line as the side plate 16, and a right-angled part 17'' that is perpendicular to the extension part 17'.
The right angle part 17'' has holes 17'A and 17'A for screws, respectively.
17''A is provided. The hole 17'A is a so-called through-hole structure formed by cutting out the extension part 17' in an inverted U shape.

The case body 1 has no front plate or rear plate, and is open at the front and rear.

Spring piece 11, locking means 14 and screw stopper 1
The material of 7 is resin, and these are integrally formed with the case body 1 by injection molding.

Reference numeral 21 denotes a locking means formed on the magnet body 2, which is a locking recess formed on both sides of the magnet body 2, that is, a locking hole bored in a pair of yoke plates 22 constituting the magnet body 2. be. The locking means 21 is a yoke plate 22
The diameter of the locking means 1 of the case body 1 is set at the center of the case body 1 so that the magnet body 2 can move back and forth.
4, that is, it is formed larger than the diameter of the locking protrusion.

The yoke plate 22 is a magnet 23 that constitutes the magnet body 2.
Higher, the magnet attracting surface 22A of the yoke plate 22 is
It has an aperture structure that is recessed from both end surfaces 22B.

The size of the magnet 2 is determined so that it can be inserted into the case body 1 and the front surface of the magnet 2 protrudes from the front opening 18 of the case body 1 when inserted inside. Further, the width of the magnet body 2 is set to be larger than the separation distance between the tips of the locking means 14 of the case body 1.

When the magnet body 2 is press-fitted into the case body 1 from the front opening 18 of the case body 1, the yoke plate 22
slides on the locking means 14 while pushing the locking means 14 apart, and the rear surface of the magnet body 2 comes into pressure contact with the other end of the pair of spring pieces 11. Then, when the locking means 21 comes to the position of the locking means 14, the force that was pushing the locking means 14 apart disappears, and the locking means 14 returns to its original position and is inserted into the locking means 21. . By this insertion, the case body 1 and the magnet body 2 are combined to form a magnetic catch.

[Effect]

By locking the locking means 21 of the magnet body 2 with the locking means 14 of the case body 1, the magnet body 2 is prevented from falling off from the case body 1, and the rear surface of the magnet body 2 is pressed against the spring piece 11. The magnet body 2 remains stationary on the case body 1 by receiving a force forward due to the restoring force of the spring piece 11.

By forming the magnet attracting surface 22A of the yoke plate 22 into a diaphragm structure, the magnet 23 is prevented from falling off from the yoke plate 22 at the end surface 22B.

When an external force is applied to the tip of the yoke plate 22 protruding from the front opening 18 of the case body 1, the magnet body 2 moves backward while compressing the spring piece 11, and the locking means 21 of the magnet body 2 also locks into the case. Main body 1
When the external force is removed, the magnet body 2 and the locking means 21 of the magnet body 2 move forward due to the restoring force of the spring piece 11 and return to their original positions.

In the above example, the locking means 14 of the case body 1 is a locking protrusion, and the locking means 21 of the magnet body 2 is a locking protrusion.
is a locking recess, and the locking means 1 of the case body 1
4 may be a locking recess, and the locking means 21 of the magnet body 2 may be a locking protrusion. Further, the locking means 21 of the magnet body 2, that is, the locking hole, is a circular hole, but any hole such as a vertically long circular hole may be used as long as the locking means 14 of the case body 1 can be moved back and forth. moreover,
Although the magnet attracting surface 22A of the yoke plate 22 is inclined from the end to the end surface 22B, the inclined surface may not be provided.

[Effect of idea]

As explained above, this invention integrally forms a pair of spring pieces and two locking means on the case body, forms two locking means on the magnet body, and attaches the magnet body to the case body. This is the main body inserted. Therefore, this invention is composed of a case body and a magnet body, and has a small number of components, and assembly of these components can be completed in one step of press-fitting the magnet body into the case body.

Therefore, according to this invention, since the number of component parts and the assembly process are reduced, it is possible to improve productivity.

Furthermore, the case body that makes up this idea has
Unlike the conventional technique, there is no rear plate, and the holes in the screw fixing part have a through-hole structure, unlike the conventional technique. Instead of having to slide the mold, the mold only needs to be slid in one direction, which simplifies the mold sliding mechanism, which also has the effect of improving productivity. It will be done.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of this invention, Fig. 2 is an exploded perspective view showing an embodiment of this invention, Fig. 3 is a sectional view taken along line A-A in Fig. 1 is a sectional view taken along line B-B, and FIG. 5 is a diagram showing the prior art.
is a perspective view, and b is an exploded perspective view. 1...Case body, 11...Spring piece, 14...
Locking means, 2... Magnet, 21... Locking means, 3
...Metal spring, 4...Case lid.

Claims (1)

[Claims for Utility Model Registration] 1. A magnet is inserted into a case main body through a front opening of the case main body, and one end of the magnet is fixed to the rear of the case main body, the rear surface of which has a rear opening. and the locking means is in pressure contact with a pair of spring pieces whose other ends protrude forward, and the locking means formed on both side surfaces of the magnet body are formed on the inner surfaces of both side plates of the case body. latched to,
and a magnetic catch in which the front surface of the magnet body protrudes from the front opening of the case body. 2. The magnetic catch according to claim 1, wherein the locking means of the magnet body is a locking recess, and the locking means of the case body is a locking protrusion. 3. The magnetic catch according to claim 1, wherein the locking means of the magnet body is a locking protrusion, and the locking means of the case body is a locking recess. 4. The magnetic catch according to any one of claims 1 to 3, wherein the hole of the screw fixing part formed integrally with the case body has a penetrating structure.