JPH0869829A - Electric connecting structure - Google Patents

Abstract

PURPOSE: To provide an electric connecting structure by which failure is reduced by preventing a short circuit in the vicinity of a terminal assembly and which can endure long-term use and has the long service life. CONSTITUTION: In an electric connecting structure 1 having a terminal assembly 3 sealed by inserting pin terminals 34 in axial directional inserting holes 32 of an almost disk-shaped conductive terminal board 30, the electric connecting structure 1 having insulators 37 to cover exposed side surfaces of the terminal board 30 is constituted. The electric connecting structure 1 by molding urethane resin as the insulators 37 by a mold is constituted. The electric connecting structure 1 by adding an insulating disk having pullout holes of the pin terminals 34 in the insulators 37 is constituted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-resistant electrical connection structure, for example, which constitutes a partition wall of two chambers having a pressure difference and relays electrical signals from one chamber to the other chamber for connection. It is a thing.

[0002]

2. Description of the Related Art FIG. 5 is a structural explanatory view of a conventional electrical connection structure. In FIG. 5, 1 is an electrical connection structure, 2 is a connecting tube, 3 is a terminal plate, and 4 is a retaining ring. 21 and 22
Is a rib and a stop groove of the connecting tube 2. Further, 30 is a terminal board made of the metal of the terminal plate 3, 34 is a pin terminal, 35 is an annular sealing glass surrounding the lead 34, and 36 is an O-ring. Reference numeral 5 is an air chamber, 6 is a pressure chamber, 51 is an air chamber side signal line, and 61 is a pressure chamber side signal line.

In the conventional electrical connection structure having such a structure, both ends of the signal line 51 and the signal line 61 are connected to a predetermined circuit, and the pressure chamber 6 side and the air chamber 5 side are relayed to each other for electrical connection. Can be connected to each other. Water and oil from the pressure chamber 6 side are hermetically sealed by an O-ring 36 on the outer periphery of the terminal plate 3.

[0004]

As described above, in the conventional electrical connection structure, the terminal board 30 and the leads 3 are provided on the left and right side surfaces of the metal terminal plate 3 with the thin cylindrical sealing glass 35 interposed therebetween.
4 is exposed. Therefore, conductive dust d mixed in water or oil in the pressure chamber 6 may adhere as shown in the figure. If the conductive dust d adheres to the vicinity of the leads 34 and the terminal board 30, there is a problem that not only an electrical short circuit occurs and an electric device malfunctions, but also an electronic circuit fails.

The present invention has been made in order to solve the above problems of the conventional electrical connection structure, and prevents an electrical connection structure having a long life by preventing a short circuit in the vicinity of a terminal plate. It is intended to be realized.

[0006]

According to the present invention, there is provided an electrical connection structure comprising a terminal plate in which a pin terminal is inserted and sealed in an axial insertion hole of a substantially disk-shaped conductive terminal board.
The electrical connection structure is provided with an insulator that covers the exposed side surface of the terminal board. In addition, an electrical connection structure is formed by molding urethane resin on the insulator. Furthermore, an electrical connection structure is formed by attaching an insulating disk having a pin terminal lead-out hole to an insulator.

[0007]

Operation: Pin terminals are passed through the respective insertion holes of the terminal board and sealed with sealing glass. After sealing, an insulator made of urethane resin is injected into the recessed portions on both side surfaces of the terminal board and solidified into a mold shape. Then, a plurality of pin terminals are fixed to both side surfaces of the terminal substrate covered with an insulating material by protruding both ends thereof, are provided with pressure resistance and are insulated, and are attached to the terminal substrate.

After that, the terminal plate having the O-ring mounted in the mounting groove is inserted into the resin-molded connecting cylinder. After the terminal plate is inserted into the connecting tube, the retaining ring is fitted into the retaining groove so that the terminal plate is assembled at a predetermined position of the connecting tube. The fitting portion between the built-in terminal plate and the connection tube is airtightly held by the O-ring. The core of the signal line is wound around both ends of each terminal pin and soldered.

[0009]

【Example】

Example 1. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a structural explanatory diagram of Embodiment 1 of the present invention, and FIG.
3 is a perspective view of a main part thereof, and FIG. 3 is an explanatory diagram of an application example of the first embodiment. In the embodiment of the present invention, the same reference numerals are given to the portions corresponding to the conventional structure, but since the structure is partially different, this embodiment will be described in some detail. In FIG. 1, 1 is an electrical connection structure and 2 is a connection tube in the electrical connection structure 1. The connection cylinder 2 is made of synthetic resin. Reference numeral 21 is a rib formed so as to project in a ring shape on the inner peripheral surface of the connecting cylinder 23, and 22 is an annular stop groove.

Reference numeral 3 is a terminal board, and 30 is a terminal board of the terminal board 3. A steel material is used for the terminal board 30, and the terminal board 30 has a diameter that allows it to be inserted into the connection tube 2 and has a substantially I-shaped cross section. Reference numeral 31 is a disk-shaped recessed portion provided on both side surfaces of the terminal substrate 30, 32 is a plurality of insertion holes axially penetrating in the recessed portion 31, and 33 is a rectangular-shaped outer peripheral surface. It is a mounting groove.

Reference numeral 34 is a pin terminal, and 35 is a sealing glass. The pin terminal 34 is surrounded by the sealing glass 35,
Both ends are projected and are inserted into the plurality of insertion holes 32, respectively. 36 is an O-ring fitted in the mounting groove 33,
7 is an insulator. The insulator 37 is made of urethane resin or the like and is molded in the recessed portions 31 on both side surfaces.

Numeral 4 is a retaining ring, which is formed in a C shape having an opening, for example. The stop ring 4 is inserted into the connecting tube 2 while being contracted, and is elastically fitted into the stop groove 22 from the inside to lock the terminal plate 3 to the connecting tube 2. Reference numeral 5 is an air chamber formed on the left and right of the terminal plate 3, and 6 is a pressure chamber formed on the right. Reference numeral 51 is a signal line on the air chamber side, and 61 is a signal line on the pressure chamber side. The terminal plate 3 of the electrical connection structure 1 constitutes a relay terminal that connects the signal lines 51 and 61.

In FIG. 3, S is the surface of the sea, M is an electronic device such as a relay junction box or a sensor installed in the sea, B is a container for housing the electronic device M, and O is a filling oil such as castor oil or silicone oil. is there. The oil 0 is pressurized in the range of 1 to 1000 Kgf / cm ² and filled in the storage container B. Further, C is a lead-out cable, and P is a plug.

In the embodiment of the present invention having such a structure,
The terminal board 30 including the recessed portion 31, the plurality of insertion holes 32, the mounting groove 33, and the like is manufactured by turning a round bar steel material by machining. Each insertion hole 32 of the manufactured terminal board 30
The pin terminals 34 are respectively passed through and are sealed with the sealing glass 35. After sealing, the recessed portions 31 on both sides of the terminal board 30
Then, an insulator 37 made of urethane resin is injected and solidified into a mold. Then, the plurality of pin terminals 34 are fixed to both side surfaces of the terminal board 30 covered with the insulator 37 with both ends protruding, are insulated from each other by providing pressure resistance, and are attached to the terminal board 30.

Thereafter, as shown in FIG. 2, the mounting groove 33 is formed.
The terminal plate 3 having the O-ring 36 attached thereto is inserted from the pressure chamber 6 side into the connection cylinder 2 which is resin-molded in advance. Terminal board 3
Is inserted into the connecting tube 2 and inserted into the position of FIG. 1, and then the retaining ring 4 is fitted into the retaining groove 22 and the terminal plate 3 is incorporated into the connecting tube 2 at a predetermined position as described above. The fitting portion between the incorporated terminal plate 3 and the connection cylinder 2 is airtightly held by the O-ring 36. The cores of the signal lines 51 and 61 are wound around both ends of each terminal pin 34 and then soldered.

An application example of such an electrical connection structure 1 is as follows.
It is shown in FIG. Although not shown in detail in FIG. 3, the air chamber 5 on the left side of the electrical connection structure 1 is formed by a gap in the cable C. Further, the pressure chamber 6 on the right side is communicated with the oil chamber inside the storage container B in which the electric device M is filled with oil O at a constant pressure and stored. Then, the storage container B accommodating the electronic device M such as an underwater sensor is installed in the sea, the electrical connection structure 1 constitutes a part of the partition wall of the storage container B, and the terminal plate 3 in the connection tube 2 is A relay terminal for a power supply or a signal line that connects with a cable C led to a land or a ship is configured.

Example 2. FIG. 4 is a sectional view of the essential parts of Embodiment 2 of the present invention. The second embodiment differs from the first embodiment in the structure of the insulator 37 that covers the side surface of the metal terminal board 30. The insulator 37 of Example 2 is formed in a disc shape,
An extraction hole 38 into which the plurality of pin terminals 34 are inserted is provided. A resin disk or the like is used for the insulator 37, and the insulator 37 is attached to both side surfaces of the terminal substrate 30 with an adhesive or the like, with the pin terminals 34 passing through the extraction holes 38.

In the second embodiment having such a structure as well, due to the simple structure of the insulation treatment, malfunctions and failures of the electronic equipment due to the adherence of dust in the air chamber 5 and the pressure chamber 6 occur as in the first embodiment. Can be prevented. Further, since the insulators 37 of both embodiments cover and reinforce both side surfaces of the terminal board 30, there is an advantage that the pressure resistance and the airtightness are further improved.

In the embodiment of the present invention described above, the terminal board 3
In the above description, the case where one partition is sandwiched between the air chambers 5 and the other is sandwiched between the pressurized oil pressurization chambers has been described, but the present invention can be applied to a partition having no pressure difference. . Also,
Although the terminal board is made of steel and the pin terminal is glass-sealed, the terminal board is made of a conductive metal such as brass, and if the pin terminal is pressure-resistant and airtightly sealed. Means may be used, and the material and shape are not necessarily limited to the embodiment.

[0020]

According to the present invention, the terminal board is exposed in the electrical connection structure provided with the terminal board in which the pin terminals are inserted and sealed in the axial insertion holes of the substantially disk-shaped conductive terminal board. The electrical connection structure was provided with an insulator covering the side surface. Also, an electrical connection structure was formed by molding urethane resin on the insulator. Furthermore, an electrical connection structure was constructed in which an insulating disk provided with lead-out holes for pin terminals was attached to the insulator.

As a result, unlike the conventional case, even if conductive dust mixed in the pressure chamber or the air chamber is attached, the pin terminals and the terminal board are not electrically short-circuited. For this reason,
It does not happen that the electrical equipment malfunctions or the electronic circuit fails.

Therefore, according to the present invention, it is possible to provide an electrical connection structure which prevents short-circuiting in the vicinity of the terminal plate, has few failures, and has a long service life that can withstand long-term use.

[Brief description of drawings]

FIG. 1 is a configuration explanatory diagram of a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part of the first embodiment of the present invention.

FIG. 3 is an explanatory diagram of an application example of the first embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a second embodiment of the present invention.

FIG. 5 is an explanatory diagram of a configuration of a conventional terminal board.

[Explanation of symbols]

 1 Electrical Connection Structure 2 Connection Cylinder 3 Terminal Plate 4 Stop Ring 5 Air Chamber 6 Pressure Chamber 21 Rib 22 Stop Groove 30 Terminal Board 31 Recessed Notch 32 Insertion Hole 33 Mounting Groove 34 Pin Terminal 35 Sealing Glass 36 O-ring 37 Insulation Body 38 Draw-out hole 51 Signal line 61 Signal line B Storage container C Cable M Electronic device O Oil P Plug S Sea level

Claims (3)

[Claims] 1. An electrical connection structure comprising a terminal plate in which a pin terminal is inserted and sealed in an axial insertion hole of a substantially disk-shaped conductive terminal substrate, wherein an exposed side surface of the terminal substrate is provided. An electrical connection structure characterized by being provided with a covering insulator. 2. The electrical connection structure according to claim 1, wherein urethane resin is molded on the insulator. 3. The electrical connection structure according to claim 1, wherein an insulating disk provided with a lead-out hole for a pin terminal is attached to the insulator.