JPH0945424A - Fpc plate connection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a FPC plate connection device in which penetration of water into the conduction portions of a FPC plate and a connector can be prevented with a simple structure, by standing a specific waterproof wall around a containing recessed portion containing a connection lug of a FPC plate formed on the back face of an instrument case after bending the lugs. SOLUTION: A FPC plate connection device is composed of an instrument case 1, a FPC plate 2 disposed on the back face of the instrument case 1, a connection lug 4 which is formed on the FPC plate 2 and is equipped with plural conduction portions 3 in parallel, a containing recessed portion 5 which is formed on the back face of the instrument case 1 and contains the connection lug 4 after bending the same, waterproof walls 6, 6A which are protrusively provided on the whole periphery of the containing recessed portion 5 and at least a portion abutting on the connection lug 4 of which tilts against a horizontal direction, a connector 10 which is insertion- mounted into the containing recessed portion 5 and contains terminals 9 electrically connected to the conduction portion 3 of the connection lug 4, and a connector cover 11 which is covered by the connector 10 and covers the waterproof walls 6, 6A. It is desirable that a slit portion 7 is provided close the waterproof walls 6A on the tilt containing recessed portion 5 side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an FPC board connecting device used for an instrument exposed to wind and rain such as a motorcycle.

[0002]

2. Description of the Related Art Conventionally, in a case in which a case is provided with a recess and an FPC board and a connector are electrically connected in the recess, water penetrates into a conductive part between the FPC board and the connector, which causes poor conduction. As an improvement of the ease, there is, for example, Japanese Utility Model Laid-Open No. 61-176785, in which a waterproof wall is formed around the recess and the connector is covered with a waterproof cover.

[0003]

However, in the above-mentioned conventional example, the waterproof wall is provided above and to the left and right of the case integrally with the case, but below the case, that is, F.
Since the waterproof wall cannot be provided by the wiring of the FPC plate on the conductive part side of the PC plate and the connector and is flat, rainwater easily permeates from between the FPC plate and the waterproof cover even on the lower side of the case, Therefore, there is a possibility that a conduction failure such as a short circuit may occur. Also, due to the structure of the instrument, the FP is on the upper side of the case.
Since the C plate is often wired, the waterproof wall cannot be provided on the upper side of the case, and the same problem may occur. Further, in the second example of the conventional example, since the waterproof wall and the packing are provided over the entire circumference of the recess, the penetration of rainwater can be prevented, but the number of parts increases because the waterproof wall and the packing are separate bodies. Assembly is also difficult.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an FPC board connecting device capable of preventing water from permeating into the conductive parts of the FPC board and the connector with a simple structure. And

[0005]

In order to solve the above-mentioned problems, the present invention solves the above-mentioned problems. An instrument case, an FPC plate disposed on the back surface of the instrument case, and a plurality of conductive portions formed on the FPC plate and arranged in parallel. A connecting tongue provided with, a storage recess formed on the back surface of the instrument case for storing the connection tongue by bending, and a portion protruding all around the storage recess and abutting at least the connection tongue. A waterproof wall that is inclined with respect to the horizontal direction, a connector that is inserted and installed in the storage recess and has a terminal that electrically connects to the conductive portion of the connection tongue, and the connector that is covered with the waterproof wall. It consists of a connector cover that covers the wall. Further, a groove is provided near the waterproof wall on the side of the inclined storage recess.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION FPC arranged on the rear surface of an instrument case
The connection tongue of the plate is bent and stored in the storage recess provided in the instrument case, and a waterproof wall is provided on the entire circumference of the storage recess, in which at least the portion where the connection tongue abuts is inclined to the horizontal direction . Then, the connector having the built-in terminal is inserted into the storage recess and mounted, and the connecting tongue of the FPC board and the terminal of the connector are electrically connected. Since the connector cover is covered on the connector and the waterproof wall with which the connecting tongue of the FPC board is in contact is inclined, water adhering to the back surface of the case or the FPC board is transmitted through the inclined waterproof wall. An FPC board connecting device in which water does not flow down and does not penetrate into the conductive portion of the connecting tongue and the terminal in the storage recess.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described based on embodiments, but FIG.
[FIG. 3] is a partial perspective view of the rear side of the instrument case as viewed from below to above. The FPC board 2 is arranged on the back surface of the instrument case 1 made of synthetic resin. In the instrument case 1, a storage recess 5 for storing the connection tongue 4 provided with a plurality of conductive portions 3 formed on the FPC board 2 by bending is provided, and the storage case 5 is integrated with the instrument case 1 around the entire circumference thereof. The waterproof walls 6 and 6A are provided so as to project.
At this time, the waterproof wall 6 which the connecting tongue 4 of the FPC board 2 gets over
A is a downward slope to the horizontal when viewed from the rear surface of the instrument case 1. Further, when the waterproof wall 6A is on the storage recess 5 side, a groove portion 7 is provided in a range wider than the width of the connecting tongue piece 4, and a pin 8 for fixing the connecting tongue piece 4 to the bottom of the storage recess portion 5 is provided. Is projectingly provided, and one end of the connecting tongue piece 4 is engaged with and fixed to the pin 8.

Then, by inserting and mounting the connector 10 having the terminal 9 therein into the storage recess 5, the conductive portion 3 of the connecting tongue 4 and the terminal 9 of the connector 10 are brought into contact with each other and electrically connected. Further, the connector 10 is covered with a connector cover 11 formed of an elastic member so that when the connector 10 is inserted into the housing recess 5 and mounted, it covers the outer peripheries of the waterproof walls 6 and 6A.

In the FPC board connecting device having such a structure, even if water is splashed on the back surface of the instrument case 1 due to rainwater or car wash and water is attached between the FPC board 2 and the connector cover 11, the waterproof wall 6A is inclined to the lower right when viewed from the rear surface of the instrument case 1, water flows down rightward along the FPC board 2 or the connector cover 11, and the conductive portion 3 of the connecting tongue 4 and the terminal 9 of the connector 10 are connected. And never penetrate.

Further, even if water adheres to the waterproof wall 6A between the instrument case 1 and the FPC board 2, the water does not penetrate into the conductive portion 3 and the terminal 9 of the connector 10 in the same manner. Since the groove portion 7 is provided in the storage recess 5 of the waterproof wall 6A, even if water gets over the waterproof wall 6A, the presence of the groove portion 7 prevents the further penetration of water.

In the present embodiment, the waterproof wall 6A has a downward slope to the right when viewed from the rear surface of the instrument case 1, but it may have a downward slope to the left. Needless to say, the waterproof wall in contact with the connecting tongue is inclined with the instrument case attached.

[0012]

As described above, according to the present invention, a waterproof wall is provided so as to project around the entire circumference of the accommodating recess for accommodating the connecting tongue of the FPC plate formed on the back surface of the instrument case, and at least the connecting tongue is By sloping the waterproof wall in contact with the horizontal direction, water adhering to the back side of the instrument case flows down along the sloping waterproof wall and flows to the conductive part of the connecting tongue and the terminal side of the connector. It does not penetrate. Further, by providing the groove portion on the waterproof wall on the side of the inclined storage recess, even if water gets over the waterproof wall, there is the groove portion,
Further penetration of water into the conductive part of the connecting tongue and the terminal side of the connector is prevented.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of an FPC board connecting device showing an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of an FPC board connecting device showing the same embodiment.

[Explanation of symbols]

 1 Instrument case 2 FPC board 3 Conductive part 4 Connection tongue 5 Storage recess 6, 6A Waterproof wall 7 Groove 9 Terminal 10 Connector 11 Connector cover

Claims (2)

[Claims] 1. An instrument case, an FPC plate disposed on the back surface of the instrument case, a connecting tongue formed on the FPC plate and having a plurality of conductive portions arranged in parallel, and a back surface of the instrument case. A storage recess formed to fold and store the connection tongue, and a waterproof wall projecting over the entire circumference of the storage recess and at least a portion in contact with the connection tongue being inclined with respect to the horizontal direction, An FPC, characterized in that it comprises a connector that is inserted into and mounted in the storage recess and that has a built-in terminal that electrically connects to the conductive portion of the connection tongue piece, and a connector cover that is covered by this connector and that covers the waterproof wall. Board connection device. 2. An FPC board connecting device, characterized in that a groove is provided on the waterproof wall on the side of the inclined storage recess.