JPS61146203A - Crasp using permanent magnet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device using permanent magnets for use in seat covers, etc. of seats.

(Prior art) Is the 11 tool using a permanent magnet easy to engage and disengage? Since it is an I, it is widely used as an M in bags, etc. For example, as shown in Fig. 8, a permanent magnet has a through hole (1) a from one magnetic pole surface a to the other magnetic pole surface b. (
1) between the protruding rod part (2) a of the ferromagnetic member (2) fixed to one magnetic pole surface a and the other magnetic pole surface b. /I The protruding rod part (3) a of the ferromagnetic member (3) that is in contact with the through hole (
1) The fasteners (11) and (12) are attached to the mounting fabric by caulking the fasteners (11) and (12) to secure them. , and the leg pieces (II) a and (+2) a formed integrally therewith are bent and attached.

(Problem to be Solved by the Invention) However, in such a fastener, the leg pieces are integrally fixed to the II-tool, and the pair of leg pieces are inserted into the mounting fabric to be attached. If a hole is made in the mounting fabric and the surface of the fabric is damaged, one end of the mounting fabric is pushed and bent, or a force is applied in the direction of pushing open the mounting fabric to which the fastener is attached. There were problems such as a lever-like force acting on the suction surface and the suction being likely to come off.

(Means for Solving the Problems) This invention was provided to solve the above-mentioned problems, and its purpose is to attach it to the fabric at the center of the back side and make it tiltable. The structure is designed to maintain suction engagement even when the magnetic poles move, and to be able to be fixed without drilling holes in the mounting fabric. A permanent magnet (1) having a hole (1) a toward the other magnetic pole face from a
a ferromagnetic member (2) attached to one magnetic pole surface a;
The ferromagnetic member (2) or (3) is removably attracted to the ferromagnetic member (2) through the hole (1)a through the hole (1)a. ) A short synthetic resin cylinder is provided approximately at the center of the non-adsorption surface of either or both of the cylinders, and the inner wall surface of the cylinder is a conical hole with threads or steps. We planned to make a considerable design change in accordance with the gist of the configuration, in that a fitting having a threaded or stepped male rod part was inserted into the female hole through the fabric. It is something.

(Example) Examples of the present invention will be described below with reference to the drawings. Figure 1 shows a pair of stops A and B that use permanent magnets (1). In stopper A, the permanent magnet (1) is a sintered magnet such as a ferrite magnet, a steel bar magnet, a plastic magnet, or It is made of a rare earth magnet, etc., and has a hole (1) a extending from one magnetic pole surface a to the other magnetic pole surface a, especially when an attractive force is required. , a protruding rod part (with a length that reaches the middle of the hole (1) a of the permanent magnet (1) and an outer diameter that does not touch the circumferential surface of the hole (1) a) is provided in the center of the disk shape.
2) A ferromagnetic member (2) integrally formed with a is attached by adsorption, and the non-adsorption surface (2) b and the hole (
1) The outer surface other than a is covered with a synthetic resin (4), and a short cylindrical body (5) made of the same material is provided approximately in the center of the non-adsorption surface (2) b, and the cylindrical body ( 5) The inner wall surface is threaded (5
) A or a drilled hole with steps. Also, the stop B is formed in the same way as the stop A, and has a non-adsorbing surface ( 3) b and the periphery are covered with a synthetic resin material (4'), a short cylinder (6) made of the same material is provided approximately in the center of the non-adsorption surface (3) b, and the cylinder (6) is made of the same material. The inner wall surface of 6) is threaded (6)
A or a drilled hole with steps.

Figure 2 shows the ferromagnetic member (3) of the stop B without the protrusion (2) a of the ferromagnetic member (2) of the stop A in Figure 1.
When the protruding rod part (3) a of the ferromagnetic member (2) is engaged with the stopper A,
) The length dimension is set so as to reach the surface, and the third
The figure shows a case where the protrusion part (3) a of the ferromagnetic member (3) in the stop B is not provided, contrary to Fig. 2. In this case, the protrusion part (3) which also serves as a guide to the engagement position Instead of a, the peripheral edge of the synthetic resin (4°) of stop B is made to protrude beyond the suction surface of the ferromagnetic member (3) to prevent the suction position from shifting when engaged with stop A. .

In addition, in the above embodiment, the outer peripheral surface of the stop A is covered with synthetic resin (4), and since it can be integrally molded by inserting a permanent magnet etc., the permanent magnet for assembly is not required. It has the feature that there are no accidents such as breakage.

Figure 4 shows the ferromagnetic members (2) and (3) in Figure 1 as ferromagnetic plates (2°) and (3゛) and ferromagnetic rods (2'') and (3), respectively.
When caulking the ferromagnetic plates (2°) and (3°) using the small diameter parts of the ferromagnetic rods (2") and (3"), the short cylindrical bodies made of synthetic resin ( 5) and (8) on the non-adsorption surfaces (2°) b and (3°) of the ferromagnetic plates (2°) and (3°), respectively.
°) It is caulked at the same time in the center of b, and the stopper A
The magnetic pole face and outer circumferential surface of the permanent magnet (1) and the ferromagnetic plate (2
) and the synthetic resin or non-ferrous metal case (7°).
) and integrated.

Figure 5 shows the permanent magnet (1) of stop A in the case of Figure 4.
A ferromagnetic magnetic shield plate (8) is attached to the magnetic pole face of the case (7), and the peripheral edge (7) a of the case (7) on the side of the attraction surface with the stopper B is provided to protrude in the direction of engagement with the stopper B. , to guide the stop B to the suction position to ensure reliable engagement, and to prevent the magnetic recording surface of the magnetic card, etc., from directly contacting the engaging suction surface to prevent destruction of the magnetic recording. This is what I did.

Fig. 6 shows a magnetic shield plate (8) attached to the magnetic pole face of the permanent magnet (1) of the stopper A in Fig. 1, and a ferromagnetic member ( 2) Non-adsorption surface (
2) The peripheral edge of b is coated with synthetic resin (4).

(Function) Facing fasteners A and B, attach fabric c from both sides of mounting fabric c and c'.
, c' are interposed between the hemispherical fittings (9) and (10) threads (9'a) and (10')a as shown in Fig. 7.
Or, by screwing or inserting the male rod part (9)' (10°) having the stepped part into the cylinder (5), (8) and fixing it, it can be fixed to the mounting fabric c, c'. The flexibility of the synthetic resin allows for a tight fit.

(Effects) As described above, the present invention provides a ferromagnetic member (2 ) and the ferromagnetic member (3) that comes into contact with the other magnetic pole face are connected to the hole (
1) In the stopper which is removably attracted via a, a short synthetic resin-made part is located approximately in the center of the non-adhering surface of both or either of the ferromagnetic members (2) and (3). A cylindrical body is provided, and the wall surface of the cylindrical body is a drilled hole having threads or flutes, and the mounting is carried out by inserting a fitting having a threaded or fluted male rod part into the female hole through the fabric. Since the pair of fasteners A and B are fixed to the mounting fabric at the center of the back, it is possible to swing, and the mounting fabric can be tilted, or the mounting fabric can be tilted. Even when the fabric moves in the direction of separation, no lever-like prying force is applied to the suction surface, so the suction force does not weaken.
The suction engagement state can be maintained.

In addition, it can be securely attached to fabrics etc. without making holes due to the flexibility of the synthetic resin, so it can be used as a fastener for seat covers, table covers, sofa covers, etc.
The fixture 9 or 10 can be decorated and used as a button for clothes, etc.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention, Figs. 2 to 6 are sectional views of various other embodiments, and Fig. 7 is a sectional view showing a method of attaching fasteners together. , FIG. 8 is a sectional view of a conventional example. 1... Permanent magnet, 2.3... Ferromagnetic member, 4.4'
...Synthetic resin, 5.6...Cylinder, 7...Case,
8... Magnetic shield plate, 9.10... Mounting tool, a,
b...Magnetic pole surface.

Claims (1)

[Claims] Hole (1) a from one magnetic pole surface a to the other magnetic pole surface b
A ferromagnetic member (2) attached to one magnetic pole surface a of a permanent magnet (1) having In the stopper which is removably attracted through the ferromagnetic member (2) and/or (3), a short synthetic resin cylinder is provided approximately at the center of the non-attractive surface of either or both of the ferromagnetic members (2) and (3). and the inner wall surface of the cylinder is a female hole having threads or steps, and a fitting having a male rod portion of threads or steps is inserted into the female hole through the mounting fabric. A stop using a permanent magnet.