JP3508693B2 - connector - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector having a sealing layer formed by potting. 2. Description of the Related Art Conventionally, an example of a board connector as shown in FIG. 7 is known. This is provided with a male housing 1 having a bottomed cylindrical shape as a whole in which a hood portion 3 is formed on the front surface of a thick rear wall portion 2, and a plurality of terminals are inserted into the rear wall portion 2 of the male housing 1. An opening 4 is opened, and a male terminal fitting 5 having an L-shaped tab shape is inserted into each terminal insertion opening 4 from the rear surface side, and one end side thereof protrudes into the hood portion 3 in a plurality of upper and lower stages. In addition, the other end side is arranged in a plurality of front and rear rows so as to protrude downward, and the printed wiring board 6 is inserted into the other end of the downwardly protruding male terminal fitting 5 to correspond to the corresponding conductivity. It is designed to be connected to the road. This type of connector is disclosed in JP-A-6-333635. By the way, in such a board connector, a sealing layer 7 may be formed by potting on the rear surface side of the back wall portion 2 in order to seal the penetrating portion of the male terminal fitting 5. Potting is simply a molding method in which a liquid synthetic resin molding material is injected and then cured. On the other hand, in the relatively thick inner wall 2, a recess 8 is formed in advance on the rear surface of the inner wall 2 in order to prevent sinking or the like during housing molding. [0006] The potting molding material described above, although it is liquid, has a relatively high viscosity, so that it easily forms an air pocket in the recess 8 when cured. Then, for example, when the connector is installed in a high temperature atmosphere, the air in the air reservoir is thermally expanded, and there is a possibility that a gap is formed between the rear surface of the back wall 2 so as to peel off the seal layer 7. And there existed a problem that water infiltrated from this clearance gap and insulation, such as an electric current leaking between the adjacent male side terminal metal fittings 5, was impaired. The present invention has been completed based on the above circumstances, and an object thereof is to ensure insulation when a seal layer is formed by potting. As a means for achieving the above object, a connector according to the invention of claim 1 is characterized in that a plurality of terminal insertion openings are formed in two upper and lower stages on the side wall of the connector housing.
The terminal fittings are inserted in a penetrating manner.
Both terminals on the wall of this side wall
A recess is formed between the insertion opening for removing the meat, etc.
A sealing layer is formed on the surface by potting.
And an air escape hole for communicating the recess with the outside of the connector housing. Here, potting is a molding method in which a liquid synthetic resin molding material is injected and then cured. <Effects of the Invention><Invention of Claim 1> Even if the seal layer covers the surface of the recess, the recess communicates with the outside of the connector housing through the air escape hole.
Air cannot be collected. Accordingly, it is possible to prevent water from entering due to, for example, the air in the air reservoir being thermally expanded and peeling off the seal layer. As a result, it is possible to prevent a current from leaking between the terminal fittings. DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
It will be described with reference to FIG. In this embodiment, the board connector 10 is illustrated. The board connector 10 includes a male connector housing 11 (hereinafter referred to as a male housing). This male housing 11
As shown in FIG. 1 to FIG. 3, the synthetic resin material is formed in a horizontally long shape as a whole. Specifically, a hood portion 13 opened forward is formed at a position near the lower end of the front surface of the thick plate-like main body portion 12. A recess 15A is previously formed on the rear surface of the main body 12 of the male housing 11 in order to prevent sink marks during molding.
~ 15C are formed. In the main body 12, a plurality of terminal insertion openings 17 are formed in a penetrating manner in two upper and lower stages. On the other hand, as the terminal fitting, a male terminal fitting 18 having an L-shaped tab shape is provided, and each male terminal fitting 18 is inserted into the corresponding terminal insertion port 17 from the rear side, and one end side thereof is the hood portion 13. It protrudes from the back surface in two rows. A seal member 19 made of a gel material is attached to the back surface of the hood portion 13. A mating female housing (not shown) fitted with female terminal fittings can be fitted into the hood portion 13 using the lever operating force. On the other hand, the other end side of the male terminal fitting 18 protrudes upward in two rows. The main body 12
A pair of mounting plates 20 project from the left and right side edges of the positioning plate 2 and the positioning holes 2 extend between the upper ends of both mounting plates 20.
An alignment plate 21 formed by aligning 2 can be attached. Therefore, each male terminal fitting 18
The other end of the positioning hole 22 of the alignment plate 21
Is held in an aligned state. The other end of these male terminal fittings 18 is inserted with an edge of a printed wiring board 25 (FIG. 4) to be connected to a corresponding conductive path. The rear side of the male housing 11 from the main body 12 is accommodated in the unit box 30 together with the printed wiring board 25. Therefore, ribs 31 are formed on the peripheral surface of the main body 12 over the entire circumference. On the other hand, as shown in FIG. 1, the unit box 30 has a shape in which an upper surface and one side surface are opened, and the rib 31 is fitted into the opening 30A on the side surface over the three surfaces of the left and right sides and the bottom. A groove 32 is formed. Unit box 3
A cover plate 34 can be attached to the upper surface of 0 while the upper rib 31 is fitted in the fitting groove 33 (see FIG. 6). A seal layer 40 is formed on the rear surface of the main body 12 of the male housing 11 by potting as shown by a chain line in FIG. The formation region of the seal layer 40 is from the lower edge of the rear surface of the main body 12 to a position slightly above the protruding portion of the upper male terminal fitting 18. Then, the mounting plate 20 is viewed from the left and right side surfaces of the main body 12.
An air escape hole 42 is formed in the extended area.
Specifically, the air escape hole 42 is formed in the middle recess 15.
At the same height position as B, it is formed from the rear position of the rib 31 on the side surface of the main body portion 12 to the position where it slightly enters the mounting plate 20, and is communicated with the region of the second half of the recess 15B. Next, the operation of this embodiment will be described. The board connector 10 is assembled as follows. First, the male terminal fitting 18 is the male housing 1 as described above.
1 and a seal member 19 made of a gel material is attached to the back of the hood 13. On the other hand, an alignment plate 21 is attached to the upper ends of both mounting plates 20, and the upward projecting ends of the male terminal fittings 18 are passed through the positioning holes 22 and held in an aligned state. From this state, as shown in FIG. 4, the edge of the printed wiring board 25 is placed while the through hole 26 is inserted through the upper protruding end of the male terminal fitting 18, and each upper protruding end corresponds to the corresponding conductive. Conductive connection is established by soldering to the road. Next, as shown by a chain line in FIG. 4, a region from the lower edge of the rear surface of the main body 12 of the male housing 11 to a position slightly above the protruding portion of the upper male terminal fitting 18 is potted. A seal layer 40 is formed.
More specifically, a potting material made of a thermosetting resin in a molten state is injected into the region by surrounding the region with a jig or a mold, and the sealing layer 40 is cured by aging after that. Is formed. Thus, when the mounting of the printed wiring board 25 and the formation of the seal layer 40 are completed, as shown in FIG.
5 is not shown), the main body 12 of the male housing 11 is inserted into the fitting groove 32 of the opening 30A on the side surface of the unit box 30 from above, and finally, as shown in FIG. Assembly is completed by covering the cover plate 34. In the present embodiment, a recess 15 B provided in advance on the rear surface of the main body 12 of the male housing 11 is provided with the seal layer 4.
Although it is covered with 0, the recess 15B is in communication with the outside of the male housing 11 through the air escape hole 42, and cannot collect air. In particular, the air escape hole 4
The end portion 2 extends toward the mounting plate 20 and is not blocked by the side wall of the fitting groove 32, and the recess 15 </ b> B communicates with the outside of the male housing 11. Therefore, even if the unit box 30 is installed in a high temperature atmosphere,
There is no possibility that the air in the air reservoir is thermally expanded and the seal layer 40 is peeled off, and it is possible to prevent water from entering the rear surface of the main body portion 12 due to this. As a result, current leakage between the adjacent male terminal fittings 18 is prevented, that is, the insulation is excellent. Although there is a possibility that the potting material leaks from the air escape hole 42 at the time of injection, it may be wiped off before being cured. For the lower recess 15A,
Since the volume of the recess 15B is smaller than that of the recess 15B, it is difficult to retain air, and even if it is made, it is considered that there is little adverse effect due to thermal expansion. Although it is not necessary, it may be formed similarly if necessary. <Other Embodiments> The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention. Various modifications can be made without departing from the scope of the invention. (1) Although the case where potting is performed on the outer wall surface side is illustrated in the above embodiment, the present invention can be similarly applied to the case where potting is performed on the inner wall surface side such as the back surface of the hood portion. (2) The present invention is not limited to the board connector exemplified in the above embodiment, and a terminal fitting is inserted through the terminal insertion opening opened in the side wall of the connector housing, such as a relay connector. The present invention can be widely applied to all connectors having a sealing layer formed on the wall surface by potting.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of an embodiment of the present invention. FIG. 2 is a longitudinal sectional view of a male housing. FIG. 3 is a plan sectional view of the male housing. Fig. 5 is a perspective view of a state where a board connector is fitted in a unit box. Fig. 6 is a longitudinal sectional view of a state where a cover plate is attached. Fig. 7 is a vertical cross section of a conventional example. DESCRIPTION OF SYMBOLS 10 ... Board connector 11 ... Male housing 12 ... Main body part 13 ... Hood part 15B ... Recess 17 ... Terminal insertion port 18 ... Male terminal fitting 20 ... Mounting plate 21 ... Alignment plate 25 ... Printed wiring board 40 ... Seal layer 42 ... Air escape hole

Claims (1)

(57) [Claims] [Claim 1] The side wall of the connector housing includes a plurality of
The terminal insertion slot is divided into two stages, upper and lower.
The terminal fitting is inserted in a penetrating manner and the side wall
Recessed between the terminal insertion openings on both sides for surface removal etc.
A place is formed, and a sheet is placed on the wall by potting.
The connector is characterized in that an air relief hole is formed, and an air escape hole is formed to communicate the recess with the outside of the connector housing.