JPH0441711Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] Industrial application field The present invention relates to a wiring junction box for connecting and branching terminals of wire harnesses, electrical functional parts, etc. in automobiles and the like.

Prior Art When wiring various electrical devices in automobiles, etc., a conductor is placed inside an insulating case with multiple connectors installed on the outer wall to connect the terminals of these connectors. It is known that a large amount of wiring can be completed at once by constructing a wiring junction box and connecting terminals of various functional parts, wire harness terminals, etc. to these connectors.

Since such wiring junction boxes are usually installed inside the engine room, many machines are not only exposed to high temperatures but also come into contact with oil and water. Even with a cover, water can still get inside. Therefore, in order to prevent electricity from leaking between the wiring even if water intrudes, a wiring board with a conductor placed on an insulating board and tab-type terminals etc. protruding from the outside is made of insulating resin. There is a way to embed it in

On the other hand, as shown in FIG. 4, connector terminals must be provided in precisely regulated positions within the connector housing which is installed upright on the outer wall of the wiring junction box. Therefore, in the past, a gasket was first provided inside the back cover of the insulating case to prevent resin leakage, and then the terminal b inside the connector housing of the back cover c was installed.
The wiring board a is attached to the back cover c so that the terminal b is inserted into the terminal insertion hole h that can regulate the position of the terminal, and after the front cover is attached in the same manner, a liquid hardening resin, etc. Procedures such as filling and heating and curing are used.

However, such conventional methods not only increase the number of parts but also increase the number of assembly steps, require careful work to prevent resin leakage, and take a long time to harden the resin. , there is a problem of poor productivity. In order to solve this problem, the inventor of the present invention devised a method in which a separately assembled wiring board is embedded in an insulating resin in advance and then mounted inside the housing.

Problems to be Solved However, when implementing the above-mentioned new assembly method, the degree of freedom in positioning the connector terminals and the connector housing of the casing is lost. It is necessary to significantly improve the dimensional accuracy of each body, and if there is a large positional error in even one location, a new problem arises in that it becomes difficult to assemble the wiring junction box. Therefore, this idea is
It is an object of the present invention to provide a wiring junction box that can be easily assembled using a resin-embedded wiring board assembly as described above.

[Structure of the idea]

Means for Solving the Problems The purpose of the present invention as described above is to laminate a wiring board and a conductor, and to insulate the entire laminate except for the tab portion of the connector terminal that protrudes perpendicularly to the board surface. The connector terminal includes a wiring board assembly in which a leak prevention seat is embedded in resin and is protruded from the insulating resin in contact with the base of the connector terminal, and a surrounding wall is formed around the leak prevention seat. This can be achieved by a wiring junction box mounted in an insulating housing having a connector housing provided with a through hole through which the groups of connectors can be inserted together with the surrounding wall.

Embodiment An example of the wiring junction box of the present invention will be explained with reference to FIGS. 1 to 3.

A is an electrically insulating wiring substrate provided with conductor through holes, etc., and B is a molded conductor for wiring, and tab-shaped contact terminals b are formed at the ends thereof. C is a wiring board assembly in which a substrate A and a conductor B are laminated, and D is a wiring board assembly C mounted inside a resin mold, etc., and insulation between the wiring board assembly C and the mold. This is an embedding assembly having a resin coating E formed by filling a plastic resin. F is the back cover of the casing, G is the front cover of the casing, H is a connector housing for attaching relays, etc., and I is a waterproof cover.

A connector housing H is provided upright on the front cover G, into which a terminal b can be inserted. In addition, a through hole f is formed in the connector housing part g provided on the bottom surface of the back cover F so that the terminal groups b, b, . . . of the embedded assembly D can be inserted all at once. A connector for external connection is formed.

On the other hand, the bases of the terminal groups b, b, . Further, if necessary, a surrounding wall e, which is similarly formed integrally with the resin coating, is provided around it.

The leak prevention seat d and surrounding wall e are accommodated inside the through hole f, but in order to prevent interference between them when attaching the embedding assembly D to the back cover F, the through hole f is Of course, the shape needs to be made slightly larger (FIG. 3).

Function The wiring junction box of the present invention configured as described above has a wiring board assembly that is laminated in advance, assembled, embedded and fixed with a resin coating, and installed in the housing, and has good electrical insulation. The positioning accuracy of the connector is also good.There is a large degree of freedom when positioning the connector with respect to the housing, and it can be easily and quickly attached to the housing.

[Effect of idea]

In the wiring junction box of the present invention, the connector housing part of the casing that accommodates the wiring board assembly board that is precisely assembled and embedded in resin is formed with a through hole that has a large degree of freedom. The terminals to be inserted are equipped with a leak-proof seat and a surrounding wall, so even if the terminals get wet, there is less chance of electrical leakage due to a drop in insulation between the terminals. Not only is the structure simplified and the precision of the casing does not need to be very high, but there is also no need to attach a large number of terminals to the terminal insertion holes of the cover, making the assembly process simple and easy, increasing productivity. Ta.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the configuration of an example of the wiring junction box of the present invention, FIG. 2 is a partially enlarged perspective view showing the structure of the connector portion, and FIG. 3 is a sectional view of the connector portion. FIG. 4 is a partially enlarged perspective view showing the structure of a connector portion in a conventional wiring junction box. A...Substrate, B...Conductor, C...Wiring assembly board, D...Embedded assembly, E...Resin coating, F...
Back cover, G...Front cover, H...Connector housing, I...Waterproof cover, a...Wiring board, b...
...terminal, c...front cover, d...leak prevention seat,
e... Surrounding wall, f... Through hole, g... Connector housing portion, h... Terminal insertion hole.

Claims (1)

[Scope of utility model registration request] A wiring board and a conductor are laminated, and the entire connector terminal except for the tab part protruding perpendicularly to the board surface of the laminated body is embedded in an insulating resin, and leakage occurs when it comes into contact with the base of the connector terminal. A wiring board assembly in which a leak prevention seat is protruded from the insulating resin and a surrounding wall is formed around the leak prevention seat is provided with a through window through which the group of connector terminals can be inserted together with the surrounding wall. A wiring junction box, characterized in that it is installed in an insulating casing having a connector housing.