JPH0740287Y2 - Temperature switch - Google Patents

Description

[Detailed Description of Device] a. The present invention relates to a temperature switch composed of a reed switch, a temperature-sensitive magnetic material, and a magnet, and more particularly to a sealed type in which the reed switch is integrally molded with a mounting portion of the temperature switch. Regarding the structure of the temperature switch.

[Conventional technology]

Conventionally, this type of temperature switch has a shape in which a cylindrical reed switch 11 is joined and held by two ring-shaped magnets 12 and a ring-shaped temperature-sensitive magnetic body 13 having the same shape as shown in FIG. In, the ring-shaped magnet 12 and the temperature-sensitive magnetic body 13 is penetrated through the central hole, and the temperature switch bodies 14 formed by holding them at predetermined positions are sealed and molded into a prism shape with resin 15. At the same time, the mounting part 16 is also made of resin.
It was molded at 15, and the connection lead 17 was exposed.

However, in such a temperature switch structure, the positions of the three magnets of the two magnets 12 and the temperature-sensitive magnetic body 13 with respect to the reed switch 11 are accurately maintained, and the resin 15 is provided.
The structure of the molding die becomes complicated because it is sealed and molded with
Furthermore, it is difficult and time-consuming to set each element in the mold, and the magnetic characteristics of the sealed magnetic element change due to the stress of the resin and change the operating margin of the temperature switch. There was a quality problem that fluctuated.

[Problems to be solved by the device]

The present invention solves such a problem, eliminates the complexity of the mold for positioning each magnetic element at the time of resin molding, eliminates the trouble of setting in the mold, and is affected by the stress caused by the resin. The aim is to provide a temperature switch in which the magnetic element is completely free of resin molding of the temperature switch.

B. Configuration of the Invention [Means for Solving the Problems] The present invention relates to a temperature switch including a reed switch, a temperature-sensitive magnetic material, and a magnet, and a mounting portion provided by resin molding. Thermosensitive magnetism that is molded integrally with the mounting part provided on the side of the switch with resin and has a notch with the same shape as the cross-sectional shape of the resin on the upper part of the resin that molded the reed switch. A temperature switch characterized in that a body and a magnet are fitted and fixed.

[Action]

The reed switch is the only element sealed and molded with resin, and each magnetic element having a notch having the same shape as the upper cross-sectional shape of the molded resin is later fitted into the resin to form a temperature switch. Therefore, each magnetic element is not positioned and set before resin molding, and is not stressed by the resin, and the magnetic element is stably incorporated and fixed in the resin.

〔Example〕

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an external perspective view of a temperature switch showing an embodiment of the present invention. That is, the cylindrical reed switch 1 is first sealed and molded with the resin 5, and the shape of the molded resin 5 is such that the lower surface of the reed switch 1 is horizontal and the upper surface has a cross section of an inverted U-shape in this example. And the connection lead 7 is exposed and bent. Moreover, the mounting portion 6 is integrally formed of the resin 5 on the side portion along the reed switch 1 at the same time as the reed switch 1 is sealed and molded. Further, the U-shaped temperature-sensitive magnetic body 3 provided with the inverted U-shaped notch 4 of the same shape is joined to the two U-shaped magnets 2 provided with the inverted U-shaped notch 4 of the same shape as the cross-sectional shape of the upper portion of the resin 5. The inverted U-shaped resin 5 formed on the upper portion of the reed switch 1 in a sandwiched manner is fitted with the respective inverted U-shaped cuts 4 and is fixed at a predetermined position with an adhesive or the like to form a temperature switch. Has been done. The arrangement of the magnetic elements shown here is the case of a temperature switch that is generally OFF during operation. In such a temperature switch configuration, the reed switch 1 is the only element that is sealed and molded in the resin 5, and the U-shaped magnet 2 and the C-shaped temperature-sensitive magnetic body 3 are not resin-molded and are completely molded against the resin 5. It's free.

FIG. 2 is an exploded perspective view of a temperature switch showing a second embodiment of the present invention. This is exactly the same resin shape as that of FIG. 1 except that a U-shaped partition 8 is provided on the resin 9 in which the reed switch 1 is molded. Generally, in the case of an ON-type temperature switch during operation, the arrangement of the three magnetic elements is different from that in the case of FIG.
Two pieces on both sides are arranged so that the temperature-sensitive magnetic body 3 and the magnet 2 are inserted in the center, and a space is provided between the temperature-sensitive magnetic body 3 and the magnet 2. For this reason, the U-shaped partition 2 is provided on the resin 9, and the U-shaped magnet 2 and the U-shaped temperature-sensitive magnetic body 3 in which the U-shaped notch 4 is provided by separating only the partition 8 from the U-shaped cross section above the reed switch 1. Resin 9
Then, the temperature switch is constructed by fitting and fixing to each other and providing a gap corresponding to the thickness of the partition 8 between the magnetic elements. Even in this configuration, each magnetic element is not resin-molded and is completely free of resin 9.

In this example, the upper cross-sectional shape of the resin is U-shaped, but it may be U-shaped, triangular, etc. If each magnetic element having a notch of this shape is used, a temperature switch having the same effect can be obtained. Is clear. Therefore, the upper cross-sectional shape of the resin is not limited to the U shape.

C. Effect of the Invention [Effect of the Invention] As described above, according to the present invention, the magnetic element is not resin-molded and is completely free of resin. Therefore, it is possible to use a complicated mold or to apply the magnetic element to the mold. It is possible to provide a temperature switch which eliminates the troublesome work of setting and is constructed at a low cost, has no influence of stress on the magnetic element by the resin, and can obtain high quality.

[Brief description of drawings]

FIG. 1 is an external perspective view of a temperature switch showing an embodiment of the present invention. FIG. 2 is an exploded perspective view of a temperature switch showing a second embodiment of the present invention. FIG. 3 is an external perspective view of a conventional temperature switch. 1,11… Reed switch, 2,12… Magnet, 3,13… Temperature-sensitive magnetic material, 4… Notch, 5,9,15… Resin, 6,16… Mounting part, 7,17… Connecting lead, 8… Partition, 14 … Temperature switch body.

Claims (1)

[Scope of utility model registration request] 1. A temperature switch comprising a reed switch, a temperature-sensitive magnetic material, and a magnet, wherein a mounting portion is provided by resin molding. The reed switch is integral with a mounting portion provided on a side portion of the reed switch. A thermosensitive magnetic body in which a notch having the same cross-sectional shape as that of the upper portion of the resin and a magnet are fitted and fixed on the upper portion of the resin in which the reed switch is encapsulated and molded. The temperature switch characterized by doing.