JPH0143842Y2 - - Google Patents

Description

[Detailed explanation of the idea]

This invention enables molded plastic magnet products to be fixed to the magnet itself, bringing a new dimension to the attachment and use of plastic magnets. Therefore, as the adsorption power of this type of plastic magnets has improved, attempts have been made to use them in a wide range of directions due to their easy cast molding properties, and they have not achieved the appropriate acclaim. It is something that is present. However, in general plastic magnets, although there are differences in degree depending on the characteristics of the plastic fabric used, the mechanical strength and deflection characteristics usually required for the attached parts. This is not necessarily satisfactory, and when the plastic magnet itself is directly engaged and attached to the point of use, it causes damage or breakage to the engaging part of the attached magnet.
This made it difficult to use it fully. Furthermore, even when a female hole is formed in the plastic magnet itself and a male member is inserted into the female hole, the opening edge of the female hole may be damaged and the male member may not be able to slip out. It was induced by
Furthermore, in such a method of opening a female hole, it is difficult to insert a male member having an enlarged head. Furthermore, apart from the case of special die cutting,
It is generally said that it is impossible to mold a female hole with such a reverse taper, and creating a female hole with a reverse taper naturally increases the molding cost, and also affects the adsorption power, mechanical strength, etc. of the plastic magnet product itself. This has had a negative impact on the In view of the material and molding characteristics of such plastic magnets, it is possible to fit a separate mounting member onto a plastic magnet molded product and use this fitted mounting member to secure it. However, the installation and use of such different cases makes the casting characteristics of plastic magnets meaningless and reduces the product quality due to the molding costs of the cases and installation costs. Along with the increase in price, miniaturization and simplification of the appearance of the product were greatly hindered. In addition, the coating of such cases has a negative effect on the effective use of the magnetic field in the magnet, and in particular it diminishes the meaning of using plastic magnets, and the attraction force is reduced. Alternative uses of other magnets that are strong and low cost are commonly used. The stop structure of the plastic magnet according to the present invention was specially devised in view of the disadvantages of the conventional plastic magnet, and it effectively improves the easy casting characteristics of the plastic magnet. In addition, it adds the flexibility characteristic that is missing in plastic magnets, making the engagement between the male and female parts more reliable, and adding the flexibility characteristic to the engagement part. This effectively avoids the accompanying negative effects on the lines of magnetic force, increased product costs, and bulkiness of the product. In particular, the present invention is based on die-cutting molding of plastic magnet products, and in view of the characteristics of this magnet product, by attempting to effectively use an ultrasonic welder, it is possible to create small and simple plastic magnets. The effective structure of the female engaging part is that a part of the peripheral side of the plastic magnet is recessed, and the diameter of the recess is smaller than the diameter of the recess. A plastic plate is attached and welded to the magnetic material, and the female member has an insertion hole defined as the above, and a plastic plate is attached and welded to the magnetic material. It was placed there. Further, in the present invention, the following specific embodiments accompanying the gist of the configuration and considerable design changes accompanying these embodiments are planned. Hereinafter, one embodiment of a typical fastening structure of a plastic magnet according to the present invention will be described with reference to the attached drawings. A concave portion 1 and a circumferential concave step edge 2 with an enlarged diameter are formed as a series on the opening periphery of the concave portion 1. Next, a nylon plate 3 in which the circumferential concave step edge 2 is accommodated is prepared, and the concave step edge 2 is welded together with an ultrasonic welder.
Incidentally, this nylon plate 3 has a hole 3a for fitting a separately prepared male stopper b, and an engaging hole that expands inwardly together with the recess 1 is integrally formed. It is something. Next, in the embodiment shown in FIG. 2, the recessed step edge 2 is not formed, and the recessed part 1 is cast as a simple recess, and the nylon plate 3 is formed over the entire bottom surface of the molded product. This is a type of welded material. That is, in the above configuration method, the magnet a is sufficiently exposed even at the bottom surface, and the expected adsorption function of the magnet a is achieved.
It has a structure that is particularly effective in achieving physical therapy functions for cells, blood vessels, etc. due to the action of magnetic lines of force, and provides sufficient hardness around the magnet a, which is meaningful for accurate positioning of the attachment part. It is something. In addition, in the later configuration method, by covering the entire bottom part of the plastic magnet a with the plate 3, the attachment of the magnet a with a buffering effect is ensured, and the connection with the male stopper b is ensured. Damage, breakage, etc. of the magnet a are reliably prevented during engagement. The plate 3 to be attached and welded has sufficient bending characteristics to enable expansion and engagement with the press fitting of the male stop b to be fitted, and a It has enough hardness to prevent the head from coming off, and the hardness, softness, and thickness are set. Furthermore, since the resin materials used are compatible with each other for ultrasonic welding, various other materials are planned to be used, without being limited to the nylon resin described above. It was selected for use in conjunction with the fabric characteristics of the plastic magnet molding surface. The nylon resin described above has particular significance in the molding surface of plastic magnets, as it has sufficient flexibility, strength, and hardness to form the engaging flange, and is also useful in forming magnets. The suitability for welding a and the plate 3 using an ultrasonic welder is particularly good, and reliable welding and integration is expected. The molded plastic magnet a is
It has a variety of shapes and dimensions depending on the purpose of use, and is not specified in the illustrated example, but has a shape that corresponds to a wide range of purposes such as adsorption or medical use. In addition, various design treatments have been applied to the magnet a, such as coloring the magnet a itself or printing a pattern on its surface. Next, the prepared male stopper b is basically composed of a male rod 5 having an enlarged head 4 to be engaged and a mounting plate 6, and is inserted from the hole 3a of the plate 3 in the magnet a through the mounting material 7. It fits into the recess 1, and the two are integrally engaged.
It should be noted that various cases of the male stopper b are anticipated due to its material, structure, etc., and the male stopper b is intended to be selected and used according to the purpose of use. Thus, the embodiment shown in FIG. 6 is one in which the strength of the enlarged head 4 is increased and a decorative button-shaped decorative part 8 is provided, and the embodiment shown in FIG. A rod 9 in the shape of a pipe with a bottom is prepared and placed in the recess 1 to be crushed and caulked.Furthermore, the embodiment shown in FIG. A pipe-shaped rod 10 is prepared, and the pipe-shaped rod 10 is inserted into the recess 1 and caulked so that the end edge thereof is exposed. The fixing structure of the plastic magnet according to the present invention has such a characteristic configuration that the magnet a itself can be directly attached to the fabric 7, etc., and the attachment and engagement part can be attached to the material of the plate 3. This material has unique flexibility, elasticity, tensile strength, and predetermined hardness characteristics, thereby effectively avoiding damage to the engaging portion. Due to these characteristics, plastic magnets, which are mass-produced at low cost through molding, can be used as is, and can be used for reliable engagement according to the purpose, and can be used as various adsorption means or magnetic It promises immediate and effective use as a means of medical treatment for a wide range of purposes. In addition, when bonding the plastic magnet and the plate, it was planned to avoid indeterminate bonding due to adhesive, and in particular, complete welding using an ultrasonic welder was planned.

【table】

【table】 [Brief explanation of the drawing]

Figures 1 to 4 are sectional views showing each embodiment of the plastic magnet, Figures 5 and 6 are side views showing each embodiment of the male stopper, and Figures 7 and 8 are the same. FIGS. 9 to 11 are cross-sectional views showing examples of attachment. In addition, in the figure 1... recessed part, 2... circumferential concave step edge, 3...
Plate, 4... Enlarged head, 5... Male rod, 6...
Mounting plate, 7... Fabric, 8... Decorative part, 9, 10
...It shows a rod.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A part of the periphery of a plastic magnet is recessed, and this recess has an insertion hole whose diameter is smaller than the diameter of the recess, and the magnetic fabric 1. A stop structure for a plastic magnet, comprising a female member to which a plastic plate is attached and welded, and a male member is fitted into a recessed part of the magnet through the insertion hole. (2) The recessed portion of the plastic magnet has an enlarged diameter recessed portion and a reduced diameter recessed portion, and a plastic plate is attached and welded onto the stepped surface of the circumferential recessed portion of the enlarged diameter. A stop structure in a plastic magnet according to the first registered claim. (3) A stop structure in a plastic magnet according to claim 1, characterized in that a plastic plate is attached and welded to the entire surface of the recessed part of the plastic magnet. . (4) A stop structure for a plastic magnet according to claim 1, wherein the welding is performed by ultrasonic welding. (5) A stop structure for a plastic magnet according to claim 1, characterized in that the plastic magnet is molded.