JPS639978Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sealed relay, and its purpose is to provide a sealed relay that is easy to ventilate.

Sealed relays are suitable for immersion cleaning in a cleaning solution after soldering to a printed circuit board, but in order to prevent contact failure due to organic gases generated from internal parts of the relay during operation, vent holes should be provided in the cover. However, with conventional methods that break part of the synthetic resin cover, the broken part is the same color as the other parts, making it difficult to distinguish, and it is possible to accidentally break other parts and damage the relay's function. There were times when I used too much force when tearing, causing other parts to break as well.

The present invention is aimed at improving these conventional drawbacks.

Embodiments of the sealed relay of the present invention will be described below with reference to the drawings.

The upper part of the relay body 1 has a through hole 2b in the cover 2.
A surrounding wall 1a having a diameter slightly larger than the diameter of the wall 1a is provided.

The cover 2 is box-shaped and made of a synthetic resin material, and has a through hole 2a formed in the upper wall, and another piece of synthetic resin 3 is attached to the through hole 2a by adhering with an adhesive or by forming the cover once. 2 and a synthetic resin piece 3 is then adhered to the through hole by secondary molding to seal it tightly.
Since it is made of a different molding material from the cover 2, it can be made in a different color to make it stand out. It is also possible to make the cover 2 of a strong molded material and to make the synthetic resin piece relatively brittle.

The relay main body 1 is housed in a cover 2, the open end 2a of the cover 2 is closed with a base 4, and the gap between the cover 2 and the base 4, as well as the gap between the terminal 1a passing through the base, is filled with a filler material 5 such as epoxy resin. Seal with.

At this time, the tip of the surrounding wall 1a is placed in contact with or close to the inner wall of the cover 2 around the synthetic resin piece 8.

After soldering to the printed board and cleaning, synthetic resin piece 3
When pressed, the synthetic resin piece 3 is supported by the surrounding wall 1a, so only the synthetic resin piece 3 breaks and falls into the surrounding wall 1a without spreading to other parts, and other contact parts of the relay body 2, etc. The ventilation work can be easily carried out without debris adhering to it.

As explained above, according to the sealed relay of the present invention, the relay body 1 is housed in the box-shaped cover 2 and the open end of the cover 2 is sealed. The through hole 2b is sealed with a synthetic resin piece 3, and an enclosing wall 1 is provided that protrudes from the relay body 1 and has a slightly larger diameter than the through hole 2b.
a is placed in contact with or close to the inner wall of the cover 2 around the synthetic resin piece 3, and since the cover 2 and the synthetic resin piece 3 are made of different materials, the color can be easily changed. By making the synthetic resin piece 3 a conspicuous color and using a brittle material, it is possible to tear it open for ventilation without any mistakes, and the inner wall of the cover 2 around the synthetic resin piece 3 can be bored in the upper part of the relay body 1. Since it is supported at the tip of the surrounding wall 1a, when the synthetic resin piece is broken, it will not reach other parts of the cover 2, and the pieces will fall only into the surrounding wall 1a, which may damage the function of the relay body. Since there are no holes, ventilation work can be easily performed.

[Brief explanation of the drawing]

The figure is a longitudinal sectional view showing an embodiment of the sealed relay of the present invention. 1: Relay body, 1a: Surrounding wall, 2: Cover, 2
a: open end, 3: synthetic resin piece, 4: base.

Claims (1)

[Scope of utility model registration request] In a sealed relay in which the relay body is housed in a box-shaped cover and the open end of the cover is sealed, a through hole drilled in the outer wall of the cover is sealed with a piece of synthetic resin, and a through hole that protrudes from the relay body and penetrates through the relay body is sealed. A sealed relay characterized in that a surrounding wall having a diameter slightly larger than the hole is arranged in contact with or close to the inner wall of the cover surrounding the synthetic resin piece.