JPS624975Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a resin-sealed electrical device in which electrical components housed in a case are sealed with a filled resin.

Conventionally, a reed switch 15 and an external lead wire 16 as shown in FIG. When sealing the switch 15 and the external lead wire 16, the amount of sealing material 18 increases and may leak out of the case 17 as shown in FIG. 5b.
As shown in Fig. 5c, since the amount of sealing material 18 is small, the reed switch 15 is exposed and the sealing effect is easily impaired, which creates a problem in work in which the amount of resin injection must be carefully adjusted. .

On the other hand, in the relay 20 as shown in FIG. 6a,
Even when the space between the base 21 and the external terminal 22 that penetrates through the base 21 and protrudes outward is sealed with a sealing material, the amount of the sealing material 18 increases as shown in FIG. Leaked outside or
As shown in Fig. 6c, since the amount of sealing material 18 is small, the sealing effect is easily impaired, and therefore there is a problem in the work that the amount of resin injection must be carefully adjusted, and furthermore, there is no variation in the sealing state. There were some drawbacks.

This idea was made to improve the above-mentioned drawbacks, and it is possible to easily obtain a proper sealing state without variations without carefully adjusting the amount of sealant injection, that is, the amount of resin injection. The purpose is to provide resin-sealed electrical equipment.

Embodiments of this invention will be described below with reference to the drawings.

In FIGS. 1a and 1b, reference numeral 1 denotes a case constituting a proximity switch, in which a reed switch 3, a lead wire 4 for leading out to the outside, etc. are housed in a first recess 2 for filling with resin. 5 is the first above
A second recess 5 is formed adjacent to the recess 2, and as will be described later, the second recess 5 is filled with a sealing material such as an epoxy resin filled in the first recess 2. The height of the partition wall 6 formed between the two recesses 2 and 5 is equal to the opening edge 2a of the first recess 2.
It is lower than that.

In the above configuration, as shown in FIG. 2, a synthetic resin sealing material 7 such as an epoxy resin is injected into the first recess 2, and the liquid level rises and overflows the upper end of the partition wall 6. If the above-mentioned injection is stopped when the overflowing portion 7a of the sealing material 7 flows into the second recess 5, a proper sealing state can be obtained.

In other words, when the sealing material 7 overflows the partition wall 6, it indicates an appropriate amount of filled resin, that is, an appropriate sealing state.

Figure 3 shows another embodiment of this invention.
8 is a case housing an electrical component 9 such as a relay; 10 is a base; an external terminal 11 of the electrical component 9 protrudes outside through the base 10; A first recess 2 for resin filling is formed in the base 10, a second recess 5 is provided in the center of the base 10, and the height of the partition wall 6 formed between the two recesses 2 and 5 is set as follows. It is lower than the opening edge 2a of the first recess 2, that is, the opening edge of the case 8.

Therefore, as shown in FIG. 4, the synthetic resin sealing material 7 is injected into the first recess 2, and the liquid level rises and overflows the upper end of the partition wall 6, causing the sealing material 7 to overflow. If the above-mentioned injection is stopped at the point when the portion 7a flows into the second recess 5, a proper sealed state can be obtained.

As described above, according to this invention, the surface on the resin filling side is adjacent to the first recess opened to the outside,
A second recess is formed with a partition wall lower than the opening edge, and when the resin injected into the first recess overflows over the partition wall, the overflow is poured into the second recess. Since the resin is accepted at can be secured.

[Brief explanation of the drawing]

Fig. 1a is a schematic sectional view showing an example of a resin-sealed electric device according to this invention with respect to a proximity switch, Fig. 1b is a plan view thereof, Fig. 2 is a sectional view of the same in a resin-filled state, and Fig. 3 is a Another example of the resin-sealed electric device according to this invention is a cross-sectional view showing a relay, FIG. 4 is a cross-sectional view of the same in a resin-filled state, and FIGS. 5a to 5c are a conventional proximity switch and its resin-filled state. Schematic cross-sectional views, Figures 6a to 6
Figure c is a schematic cross-sectional view of a conventional relay and its resin-filled state. 2... First recess for resin filling, 2a... Opening edge, 3, 9... Electrical component, 5... Second recess, 6
...Partition wall, 7,7a...Resin.

Claims (1)

[Scope of utility model registration request] In a resin-sealed electric device in which electrical components housed in a case are sealed with a filled resin, the resin-filled side has a first recess that is open to the outside, and a first recess that is adjacent to the first recess. and a second recess formed with a partition wall lower than the opening edge of the opening. 1. A resin-sealed electrical device characterized by being configured to be received by