JPH0416338Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of the Invention] This invention relates to a terminal sealing device in an electromagnetic relay or the like.

[Prior art and its problems] FIG. 4 is a sectional view showing a terminal sealing device in a conventional electromagnetic relay. In the figure, 1 is a base, 2 is a terminal of the electromagnetic relay main body R that is press-fitted through the base 1, 3 is an adhesive such as epoxy resin injected onto the surface of the base 1, and 4 is the electromagnetic relay main body. This is a cover that covers R. The adhesive 3 is filled in the recess formed by the base 1 and the cover 4, and flows into the gap between the base 1 and the terminal 2 by capillary action, and the gap between the base 1 and the terminal 2 is closed. At the same time, the joint between the base 1 and the cover 4 is also sealed by the adhesive 3.

In such a conventional structure, since the base 1 is not thick enough, the press-fitting strength of the terminal 2 is weak, and there is a problem that the terminal 2 is easily deformed by external force. As a countermeasure to this problem, it is natural to consider increasing the wall thickness of the base 1, but since the filling height of the adhesive 3 must be maintained at a certain level or higher, increasing the wall thickness of the base 1 is not recommended. At the same time, the height of the cover 4 also increases, causing a problem that the overall shape becomes larger.

Another possible method is to partially increase the thickness of the base 1 so as to surround the terminal 2, but according to this method, the adhesive is injected into the recess formed by the base 1 and the cover 4. Apart from 3, terminal 2
The problem is that adhesive must be applied to the base of the tube to seal it, which increases the number of man-hours.

[Purpose of the invention] This invention was made to eliminate the above-mentioned conventional problems, and provides a terminal sealing device that can ensure sufficient press-fitting strength of the terminal and can ensure reliable sealing without increasing the number of man-hours. The purpose is to

[Structure and effects of the invention] The terminal sealing device according to this invention has a pair of protrusions facing the narrow side of the terminal arranged side by side on a base with a terminal hole in between, and a seal between the pair of protrusions. While the terminal is press-fitted, the pair of protrusions form openings at both ends that communicate with the wide side of the terminal,
The present invention is characterized in that the adhesive injected onto the upper surface of the base is filled between the terminal and the base through the opening.

With this structure, according to this invention, the press-fitting allowance for the terminal is increased by the pair of protrusions, and the press-fitting strength of the terminal is sufficiently ensured, which not only prevents deformation of the terminal, but also The wide side of
Since it is continuous with the openings at both ends of the pair of protrusions, the width of the opening can be made large, and the adhesive injected onto the top surface of the base can easily flow into the terminal hole through this opening and connect to the base. It is filled between the terminal and the terminal, eliminating the need to separately apply adhesive to the base of the terminal and ensuring a reliable seal.

[Description of Embodiments] Hereinafter, embodiments of this invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the terminal sealing device according to this invention, and shows the state before adhesive is injected. In the figure, 1 is the base, 2
is a terminal inserted through this base 1 by press-fitting,
4 is a cover. As shown in FIG. 3, a terminal hole 5 is formed in the base 1, and
A pair of elongated protrusions 6, 6 facing the narrow surface 2a of the terminal 2 are arranged in parallel with the terminal hole 5 in between.
The height of the upper surfaces of the protrusions 6, 6 is selected so that they are flush with the open end of the cover 4.

Further, as shown in FIG. 2, the terminal 2 is formed with press-fitting protrusions 2c, 2c, and the press-fitting protrusions 2c, 2c are press-fitted between the pair of protrusions 6, 6. As a result, the terminal 2 is press-fitted into the base 1. In this case, the pair of protrusions 6, 6 provide a margin for press-fitting the terminal 2, so that the press-fitting strength of the terminal 2 can be sufficiently secured.

On the other hand, the pair of protrusions 6, 6 form openings 7, 7 that communicate with the wide surface 2b of the terminal 2 at both longitudinal ends thereof. Therefore, base 1
When the adhesive 3 is injected into the recess 8 formed by the base 1 and the cover 4, the adhesive 3 seals the joint between the base 1 and the cover 4, and also connects the terminal 2 and the base through the right openings 7, 7. Filled between 1 and 1. Therefore, there is no need to separately apply adhesive to the base of the terminal 2 as in the conventional case.

Here, since the openings 7, 7 are connected to the wide side 2b of the terminal instead of the narrow side 2a, the opening width can be made large, thereby allowing the adhesive 3 to easily spread along the protrusions 6, 6. flows into the terminal hole 5. As a result, the space between the terminal 2 and the base 1 is reliably sealed.

Note that the narrow surface 2a of the terminal 2 may be in contact with the protrusion 6, or may be opposed to it with a slight gap therebetween. In the latter case, the adhesive 3 easily flows into the gap between the narrow surface 2a of the terminal 2 and the protrusion 6 due to the so-called capillary phenomenon, and the sealing of the terminal 2 becomes more reliable.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the terminal sealing device according to this invention, showing the state before filling with adhesive, and Fig. 2 is an embodiment of the terminal sealing device according to this invention, showing the state before filling with adhesive. 3 is a perspective view of the base, and FIG. 4 is a sectional view showing a conventional terminal sealing device. 1...base, 2...terminal, 2a...narrow side,
2b... wide surface, 3... adhesive, 5... terminal hole,
6, 6... protrusion, 7... opening.

Claims (1)

[Claims for Utility Model Registration] (1) A base, a terminal inserted through a terminal hole formed in the base, and an adhesive injected into the surface of the base to seal between the terminal and the base. In the terminal sealing device, a pair of protrusions facing the narrow side of the terminal are arranged in parallel on the base across the terminal hole, and the terminal is injected between the pair of protrusions. On the other hand, the pair of protrusions form openings at both ends that communicate with the wide surface of the terminal, and the adhesive injected into the upper surface of the base connects the terminal and the base through the openings. A terminal sealing device characterized in that the terminal is filled between the terminals. (2) The terminal sealing device according to claim 1 of the utility model registration, wherein a slight gap is provided between the pair of protrusions and the narrow side of the terminal. (3) A sealing device for a terminal according to claim 1 or 2, wherein the terminal is formed with a press-fitting protrusion, and the press-fitting protrusion is press-fitted between a pair of protrusions.