JPS6215978Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a terminal sealing device that seals between a base and a terminal that penetrates the base and protrudes outward in a sealed electrical device. It is something.

[Conventional technology]

Conventionally, for sealed electrical equipment such as electromagnetic relays and micro switches, as shown in Figure 3,
The space between the base 21 and the terminal 22 is sealed by filling a small recess 23 formed in the base 21 with a sealing material 24 such as synthetic resin.

[Problem that the invention attempts to solve]

By the way, although the injection work of the sealing material 24 is performed using an injection device such as a syringe, the above-mentioned recess 2
3 is small, making the work extremely difficult, and during the injection work, the sealant 24 adheres to the upper part of the terminal 22, that is, the soldering part, making the soldering work worse, and the heating time is long. As a result, the terminal 22 will be heated more than necessary. This is a cause of thermal deterioration of the sealing material 24 due to heat shock during soldering, resulting in a decrease in sealing performance.

In view of the above points, this idea was developed to provide a terminal sealing device that facilitates the injection work for filling the sealant, prevents the sealant from adhering to excess parts such as the soldered parts of the terminal, and has excellent sealing performance. The purpose is to provide.

[Means for solving problems]

In order to achieve the above object, this invention forms a recess in the base, and forms a terminal hole at an eccentric position of this recess, and the recess allows the wide terminal to be inserted through the terminal hole. The terminal is divided into a wide part and a narrow part having a width larger than the width of the surface and communicating with each other across the terminal, and both wide faces of the terminal are connected to the wide part and the narrow part of the recess. In a terminal sealing device in which a sealing material is injected into the wide part and the sealing material is guided to the narrow part, the wide part has a tapered surface that slopes downward toward the narrow part at the bottom of the wide part. It is characterized by the fact that it has been formed.

[Effect]

In this design, the recess for injecting the sealant is divided into a wide part and a narrow part across the terminal, and these parts communicate with each other, so if the sealant is injected into the wide part, the recess can be injected into the wide part. The injected sealant also flows into the narrow portion, rises through the narrow portion due to capillary action occurring in the narrow portion, and seals the terminal. Since the bottom of the wide portion is formed with a tapered surface that slopes downward toward the narrow portion, the sealing material injected into the wide portion flows down this tapered surface and smoothly flows into the narrow portion.

〔Example〕

Embodiments of this invention will be described below based on the drawings.

In FIGS. 1 and 2, 11 is a case housing electrical equipment (not shown), 12 is a base fitted into the open part of the case 11, and the base 12 has a plurality of recesses 13. is formed.

A terminal hole 14 is formed at an eccentric position in the recess 13, and a terminal 15 is inserted through the terminal hole 14 and projects from the inside of the case 11 to the outside of the base 12. The recess 13 has a width larger than the width of the wide side of the terminal 15, so that the recess 13
wide portions 16 that communicate with each other across the terminals 15;
and a narrow portion 17. Both wide surfaces of the terminal 15 are configured to face the wide portion and the narrow portion 17, respectively.

Further, at the bottom of the wide part 16 of the recess 13,
A downwardly inclined tapered surface 18 is formed on the narrow width portion 7 side.

Reference numeral 19 denotes a sealing material filled in the recess 13 and made of a thermoplastic or thermosetting synthetic resin.

In the above configuration, the recess 13 filled with the sealing material 19 is divided into a wide portion 16 and a narrow portion 17 that communicate with each other across the terminal 15.
The sealing material 19 only needs to be injected into the wide portion 16. Therefore, the injection work of the sealing material 19 becomes extremely easy, and automated injection becomes possible. Also, apply sealant 1 to excess parts such as the soldered part of the terminal 15.
Since 9 does not adhere, soldering workability is improved, overheating of the terminal 15 is prevented, thermal deterioration of the sealing material 19 due to heat shock is prevented, and sealing performance is improved.

Furthermore, since the dimension W of the narrow portion 17, that is, the distance between one side surface of the terminal 15 and the inner surface of the recess 13, is extremely small, the sealing material 19 rises within the narrow portion 17 due to capillary action. The seal level in the part 17 is made higher than the seal level in the wide part 16 to improve sealing performance.

Furthermore, since the bottom of the wide part 16 of the recess 13 is formed with a tapered surface 18 that slopes downward toward the narrow part 17, as described above, the wide part 16 of the recess 13
The sealant 19 injected into the tapered surface 18
flows down and flows smoothly toward the narrow portion 17, and the sealing material in the wide portion 16 is reliably guided to the narrow portion 17 to perform accurate sealing.

[Effect of idea]

As described above, according to this invention, the recess for injecting the sealant is divided into a wide part and a narrow part that communicate with each other, so the sealant only needs to be injected into the wide part.
The injection work becomes extremely easy, and it is possible to prevent the sealant from adhering to the soldered portion of the terminal.

In addition, since the wide side of the terminal faces the narrow part of the recess, capillary action can be effectively generated in the narrow part, and the height of the seal in the narrow part can be increased to ensure proper sealing. Can be sealed. Furthermore, by forming a tapered surface that slopes downward toward the narrow portion at the bottom of the wide portion, the sealant injected into the wide portion flows down the tapered surface that slopes downward and smoothly flows into the narrow portion. This has the effect of being able to reliably guide the sealing material to the narrow portion.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an electrical device according to this invention, FIG. 2 is an enlarged sectional view taken along line 2-2 in FIG. 1, and FIG. 3 is a sectional view of a conventional example. 12...Base, 13...Recess, 14...Terminal hole, 15...Terminal, 16...Wide portion, 17...Narrow width portion, 18...Tapered surface, 19...Sealing material.

Claims (1)

[Scope of utility model registration request] A recess is formed in the base, and a terminal hole is formed at an eccentric position of the recess, and the recess has a width larger than the width of the wide side of the terminal inserted into the terminal hole. The terminal is divided into a wide part and a narrow part that communicate with each other, and both wide faces of the terminal face the wide part and the narrow part of the recess, respectively, and a sealing material is injected into the wide part. 1. A terminal sealing device in which a sealing material is introduced into the narrow width portion, wherein a tapered surface is formed at the bottom of the wide width portion, the tapered surface being inclined downward toward the narrow width portion.