JPS6239565Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a temperature-sensitive reed switch in which a temperature-sensitive magnetic material having a predetermined Curie temperature and a permanent magnet are arranged and adhered in the axial direction around the reed switch.

As a conventional example, there is a temperature-sensitive reed switch as shown in FIGS. 1 and 2 (Japanese Utility Model Application No. 53-162372).

That is, a container 7 made of an insulating material and having an open lower end wall to be fixed to a temperature detection point is prepared, and a reed switch 5 is installed on the upper inner wall of the container 7.
A groove 9 is provided for adhesively fixing the thermosensitive magnetic body 1 and the permanent magnets 2a and 2b with a cylindrical portion, and hollow pin terminals 11 and 11a are provided on both sides of the groove in the longitudinal direction, respectively. , 11b are provided to protrude vertically through the upper wall, and the leads of the reed switch 5 are bent perpendicular to the center axis of the reed switch and inserted into the pin terminals and bonded. It is designed to be fixed. Note that 12a and 12b are solder dip portions.

However, with the structure of the temperature-sensitive reed switch proposed above, the hollow pin terminals 11a and 11b are connected to the mounting tongue piece 8 provided at the bottom of the case 7.
Since the structure protrudes vertically upward, the dimension in the height direction increases, resulting in various problems during mounting. Further, although the lead is inserted into the hollow pin terminal 11 and soldered, there is a problem in that work efficiency is poor because the insertion state cannot be seen through due to its structure.

The present invention was developed in view of the above circumstances, and the purpose is to provide a temperature-sensitive reed switch that can reduce the height dimension of the reed switch as much as possible and improve workability. be.

The present invention will be specifically explained below with reference to Examples.

FIG. 3 is a perspective view showing an embodiment of the present invention. This temperature-sensitive reed switch 20 has an opening formed in the upper part, and a positioning mounting part 21 at the rear in the figure.
A, a pair of grooves (lead pull-out grooves) 21B, 21B at the front in the drawing, a mounting hole 21E, and a mounting tongue 21D extending in the front in the drawing; The reed switch main body 22 including the reed switch placed on the positioning mounting part 21A, and the case 21
A portion of the pin fitting groove 21C provided at the tip of the lead pull-out groove 21B is fitted into the pin fitting groove 21C, and the pin is connected to the lead 23A of the lead switch 23 pulled out into the lead pull-out groove 21B. It is constituted by a hollow pin 24. Here, the reed switch main body 22 includes a block-shaped temperature-sensitive magnetic body 22A, two permanent magnets 22B of the same shape, and a reed switch 23 placed on a groove provided above these. The leads 23A protruding from both ends of the reed switch 23 are bent horizontally at a substantially right angle, and their tips are positioned within the lead extraction groove 21B.

Next, referring also to FIG. 4, the detailed structure and assembly order of this embodiment will be explained. Case 2
Reference numeral 1 denotes a bottomed box-shaped container made of an insulating material with an upper opening divided into front and rear parts by a partition wall 21F installed on a bottom plate 21H, and a step provided on both sides of the rear opening. A positioning placing part 21A partitioned by parts 21I and 21I is formed,
Projections 21G, 2 formed on both sides of the front opening
Lead extraction grooves 21B, 21B are formed by providing a groove in the middle part of 1G that communicates with the outside from the rear opening and has a depth extending from the top surface to the middle;
The pin fitting grooves 21C, 21C are formed by processing the lower end of this groove into a circular shape. still,
The mounting tongue piece 21D having the mounting hole 21E is attached to the bottom plate 2.
1H by extending it forward. The reed switch body 22 includes a permanent magnet 2 having the same shape as the temperature-sensitive magnetic body 22A having a rectangular parallelepiped shape.
2B and 22B are connected in parallel, a common semicircular groove 22C is provided on the upper surface, and a reed switch 23 having a bent lead 23A is positioned on this groove and fixed by adhesive. Here, as is clear from the figure, the heights of the temperature-sensitive magnetic body 22A and the permanent magnet 22B are lower than the height of the case 21, and the reed switch 23 placed in the groove 22C is arranged. In this state, the upper surface of the reed switch 23 is set to be approximately the same as the upper surface of the case 21. Then, the reed switch main body 22 is placed on the positioning placement portion 21A of the case 21. At this time,
The reed switch 23 is assembled so that the tip of the bent lead 23A is accommodated in the lead pull-out groove 21B. The hollow pin 24 is a spring pin having a wave-shaped crack 24A in the axial direction, and is pressed into a circular pin fitting groove 21C formed at the lower end of the lead extraction groove 21B.
At this time, the inner diameter of the hollow pin 24 is made slightly wider than the lead 23A so that it can be inserted lightly, and the lead 23A stored in the lead extraction groove 21B is inserted to a position where it is stored in the hollow pin. . On the other hand, the diameter of the pin fitting groove 21C is set to a size in which the hollow pin 24 is reliably fitted. Thereafter, an adhesive is poured into the temperature-sensitive reed switch body 22 from above the housing opening to fix it, and the hollow pin 24 and the lead 23A are connected using a solder dip or the like. Case 2
A hollow pin 24 protruding forward of 1 serves as an external lead attachment terminal.

In addition, in the above assembly process, the assembly order centered on the reed switch body 22 is different from the above embodiments.
First, adhesive is applied to the entire surface of the positioning mounting part 21A of the case 21, and the temperature-sensitive magnetic material 22A and the permanent magnet 22B sandwiching it are sequentially placed thereon, and then the reed switch 23 is placed and fixed with adhesive. You can do it like this.

According to the device of the above embodiment, since the lead pull-out groove is opened upward, the reed switch can be attached by simply moving it from above to below, and the hollow pin can be inserted into the pin fitting groove. However, when inserting the lead, the insertion status can be seen through from the top, making assembly work more efficient. In addition, the leads of the reed switch are pulled out horizontally with respect to the mounting surface, and the external lead attachment terminals are made to protrude in the same direction, so the height dimension can be kept to a minimum, making the device more compact. Planarization can be achieved, and when applied to electronic devices, packaging density can be improved. In particular, the effect of suppressing the dimension in the height direction is further promoted by forming the temperature-sensitive magnetic material and the permanent magnet into a half-notched shape instead of a cylindrical shape as in the above embodiment. . In other words, the height to the top of the case includes the temperature-sensitive magnetic material, the permanent magnet, and the reed switch placed on the recessed groove, which is half the height of the case using a conventional cylindrical member. This is because a certain degree of height is sufficient. In addition, if the reed switch is installed with the opening of the case housing the reed switch facing upwards, as in the above example, even if resin is poured into the case opening and molded, the molded part will not be attached. Since it does not come into contact with the surface, the installation will not become unstable.

The present invention is not limited to the embodiments described above, and various modifications can be made. For example, in the embodiment described above, the positioning mounting portion 21A is formed by providing stepped portions on both sides of the rear opening of the case 21, but the invention is not limited to this, and as shown in FIG.
I'21I' may be provided, and the portion surrounded by these may be used as the positioning mounting portion 21A.

Further, in the above embodiment, the mounting tongue piece 21D is formed by extending the bottom plate of the case 21, but the present invention is not limited to this, and as shown in FIG. may be extended to form the mounting tongue piece 21D'. In such a case, the case 21 is installed upside down so that the opening contacts the surface of the device to be installed.

Furthermore, in the embodiment described above, the lead pulling direction is the direction in which the mounting tongue piece 21D extends (forward).
As shown in FIG. 7, the side wall of the case 21 is formed thickly,
Lead extraction grooves 21B', 21B' may be formed there, and the lead 23A may be drawn out in a straight line without being bent and connected to the hollow pins 24, 24. Furthermore, as shown in FIG.
1B' and the lead 23 of the reed switch 23.
It may be connected to the hollow pins 24, 24 by bending A backward and pulling it out.

Furthermore, the shape of the temperature-sensitive magnetic material and permanent magnets constituting the temperature-sensitive reed switch body 22 is not limited to the above-mentioned embodiment, and a temperature-sensitive magnetic material 22A having a semicircular bottom surface as shown in FIG. 9a is used. The entire reed switch 23 may be accommodated in the upper groove, or it may be a V-shaped groove as shown in FIG. 9b.

According to the present invention described in detail above, the temperature-sensitive reed switch can be made as small as possible in the height direction of the device, and the insertion status of the reed switch lead and hollow pin can be seen through, thereby improving workability. can be provided.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a conventional temperature-sensitive reed switch, Fig. 2 is a partially cutaway perspective view of the same device, Fig. 3 is a perspective view showing an embodiment of the present invention, and Fig. 4 is an exploded perspective view thereof. 5 is a perspective view showing another embodiment of the case used in the device of the present invention, FIG. 6 is a perspective view showing another embodiment of the device of the present invention, and FIGS. FIGS. 9A and 9B are plan views showing still another embodiment of the device according to the present invention, and sectional views showing an example of a temperature-sensitive reed switch body used in another embodiment of the device according to the present invention. 20...Temperature-sensitive reed switch, 21...Case, 21A...Positioning placement part, 21B...Lead extraction groove, 21C...Pin fitting groove, 21D...
Mounting tongue piece, 22...Temperature-sensitive reed switch body,
22A...Temperature-sensitive magnetic material, 22B...Permanent magnet, 2
2C...Concave groove, 23...Reed switch, 23A
...Lead, 24...Hollow pin.

Claims (1)

[Scope of utility model registration request] A bottomed box-shaped container having an opening at the top has a positioning mounting part formed on the inner bottom surface, and at least a pair of grooves extending in the horizontal direction from the opening surface to the outside in the wall part, It is composed of a case with a pin fitting groove formed at the lower end of this groove, a temperature-sensitive magnetic material, a permanent magnet, and a reed switch, and is placed and fixed on the positioning mounting section, and the reed switch A temperature-sensitive reed switch main body in which leads protruding from both ends are placed in the pin fitting groove via the pair of grooves, and a lead inserted from the outside through the pin fitting groove and placed on the pin fitting groove. The temperature-sensitive reed switch body includes a temperature-sensitive magnetic material whose height is lower than the height of the container, and a permanent magnet arranged in parallel to sandwich the temperature-sensitive magnetic material. 1. A temperature-sensitive reed switch, characterized in that both have a flat surface on the upper part, a common groove is formed, and a reed switch is placed and fixed on the groove.