JPH11284303A - Connecting structure of printed wiring board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a connecting structure which has a high quality and can reduce the number of parts. SOLUTION: A rigid printed wiring board 2 housed in a case 1 is mounted with a connector 3. The printed wiring board 2 is positioned in the case 1 by respectively inserting pins 14 provided on the bottom 4 side of the case 1 into through holes 13 formed through the wiring board 2. A flexible printed circuit board(FPC) tongue piece 6 is formed at part of an FPC 5 arranged on the outside of the bottom section 4 of the case 1, bent along an FPC guide 15 erected on the inside of the bottom section 4, and fixed to the bottom section 4 of the case 1 by putting the round hole 17 of the piece 6 formed on the front end side of the piece 6 on a round pin 18. The connector 3 mounted on the wiring board 2 is composed of a housing 20 having an inserting section 19 into which an FPC-side connector 7 composed of the FPC guide 15 and the FPC tongue piece 6 is inserted and a plurality of contact terminals 22 which are incorporated in the housing 20 and press-contacted with a plurality of conductive sections 21 provided on the tongue piece 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure of a printed wiring board for electrically connecting a connector provided on a rigid printed wiring board housed in a case to an FPC provided at the bottom of the case. is there.

[0002]

2. Description of the Related Art As a connection structure of a printed wiring board of this type, for example, there is one shown in FIG. On the rigid printed wiring board 2 housed in the case 1, a connector 3 having built-in terminals and electronic components (not shown) are mounted. on the other hand,
An FPC 5 is provided on the back surface of the bottom 4 of the case 1. The FPC tongue piece 6 provided in a part of the FPC 5 is provided with an FPC-side connector 7 having a built-in terminal (not shown) connected to a plurality of conductive portions on the tip side of the FPC tongue piece 6.
By connecting the connectors 3 and 7, the conductive portion provided on the rigid printed wiring board 2
The electrical connection with the conductive part provided in PC5 is achieved.

[0003]

However, in the conventional example, the connector 3 on the rigid printed wiring board 2 side and the F
Considering the workability when connecting with PC side connector 7,
The FPC tongue 6 is slightly longer. Then, after the connectors 3 and 7 are connected, the FPC tongue 6 may become loose on the back surface of the bottom portion 4 of the case 1, and the loose FPC tongue 6 may be damaged by other parts or the like. Further, the connectors 3 and 7 are used on both the rigid printed wiring board 2 side and the FPC 5 side, which increases the number of parts and increases the cost.

The present invention has been made in view of such problems, and has as its object to provide a connection structure for a printed wiring board which is excellent in quality and can reduce the number of parts.

[0005]

According to the present invention, a connector provided on a rigid printed circuit board housed in a case and an FPC connector provided on an FPC provided at the bottom of the case are provided. What is claimed is: 1. A connection structure for a printed wiring board, which is electrically connected to a printed wiring board, wherein the FPC-side connector is an FPC set up inside a bottom of a case.
Guide and F folded along this FPC guide
The connector comprises a housing having an insertion portion into which the FPC-side connector is inserted, and a contact terminal which is built in the housing and presses the FPC tongue.

Further, in the present invention, the FPC tongue piece is fixed to a bottom portion of a case or an FPC guide.

Further, the present invention is provided with positioning means for positioning the rigid printed wiring board and the case.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A rigid printed wiring board 2 housed in a case 1 has a connector 3 mounted thereon. Also,
Pin 1 provided with through hole 13 and provided on bottom 4 side of case 1
4, the rigid printed wiring board 2 and the case 1 are positioned. An FPC tongue piece 6 is formed on a part of the FPC 5 disposed outside the bottom 4 of the case 1 and bent along an FPC guide 15 erected on the inside of the bottom 4. The FPC tongue piece 6 is inserted into the round pin 18 provided inside and
To stop. The connector 3 provided on the rigid printed wiring board 2 includes a housing 20 having an insertion portion 19 into which the FPC connector 7 composed of the FPC guide 15 and the FPC tongue piece 6 is inserted, and a F20 built in the housing 20.
It comprises a plurality of contact terminals 22 for pressing a plurality of conductive portions 21 provided on the PC tongue 6.

[0009] Since the connection structure of the printed wiring board thus configured is used, the through hole 1 of the rigid printed wiring board 2 is formed.
The rigid printed wiring board 2 is positioned and accommodated in the case 1 by inserting the rigid printed circuit board 3 into the pins 14 provided on the bottom 4 side of the case 1, and the FPC is inserted into the connector 3.
The side connector 7 is inserted and the contact terminal 22 is
The FPC 5 and the rigid printed wiring board 2 are electrically connected to each other by pressure contact with the conductive portion 21. At this time, the FPC tongue is not loosened on the bottom rear surface of the case, so that the loose FPC tongue is not damaged by other components or the like. Further, on the FPC side, a connector having a built-in terminal can be eliminated, and the number of components is reduced, resulting in cost reduction.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an instrument for a vehicle will be described by assigning the same reference numerals to the same or corresponding parts as in the conventional example.
An instrument main body 8, a light guide plate 9 made of a light-transmitting resin disposed in front of the instrument main body 8, and a display panel 10 provided with a display unit; 10
The case 1 includes a pointer 11 for indicating a display unit provided on the display panel 10, a lamp 12 for illuminating the display unit and the pointer 11 of the display panel 10, and a rigid printed wiring board 2 on which the instrument body 8 is fixed.
The rigid printed wiring board 2 is fixed to the case 1 by appropriate means. The rigid printed wiring board 2 is electrically connected to the instrument main body 8, and includes electronic components (not shown) for driving the instrument main body 8, the connector 3, and the like. Further, the rigid printed wiring board 2 is provided with a through hole 13. By inserting a pin 14 provided on the bottom 4 side of the case 1 into the through hole 13, the position of the rigid printed wiring board 2 and the case 1 is changed. It is configured to be determined. The positioning between the rigid printed wiring board 2 and the case 1 is not limited to the through holes 13 and the pins 14, but may be any method and shape.

An FPC 5 is provided outside the bottom 4 of the case 1, and the FPC 5 is provided with a circuit for turning on the lamp 12, a circuit for driving a vehicle instrument, and the like. Also, a part of the FPC 5 has an FPC tongue piece 6.
Are formed. An FPC-side connector 7 is provided inside the bottom 4 of the case 1 at a position facing the connector 3. The FPC connector 7 includes an FPC guide 15 erected inside the bottom 4 of the case 1 and an FPC tongue piece 6 bent along the FPC guide 15. This F
The PC tongue 6 is the insertion groove 1 provided at the base of the FPC guide 15.
6 is inserted from the outside of the bottom 4 of the case 1 along the FPC guide 15, and 17 round holes provided on the tip side of the FPC tongue piece 6 are inserted into round pins 18 provided inside the bottom 4 of the case 1. Then, the FPC tongue piece 6 is fixed to the bottom 4 of the case 1.
The inner diameter of the round hole 17 is slightly smaller than the outer shape of the round pin 18, and the FPC tongue piece 6 stops at the bottom 4 of the case 1 so as not to move by being pressed into the round pin 18.

The connector 3 provided on the rigid printed wiring board 2 is provided on a housing 20 having an insertion portion 19 into which the FPC-side connector 7 is inserted, and on the FPC tongue piece 6 built in the housing 20. And a plurality of contact terminals 22 that press-contact the plurality of conductive portions 21.
The contact terminals 22 are soldered to the rigid printed wiring board 2.

In the embodiment constructed as described above,
Rigid printed wiring board 2 to which instrument body 8 is attached and fixed
The rigid printed wiring board 2 is positioned and stored in the case 1 by inserting the through hole 13 into the pin 14 provided on the bottom 4 side of the case 1,
The FPC-side connector 7 is inserted into the
The FPC 5 and the rigid printed wiring board 2 are electrically connected to each other by being pressed against the conductive portion 21 of the PC tongue piece 6. As a result, the meter main body 8 is driven in response to the electric signal, and the pointer 11 indicates the display unit of the display panel 10 and the lamp 12 is turned on.

As described above, the FPC connector 7 is connected to the case 1
FPC guide 15 erected inside bottom 4 of case and case 1
Provided on a part of the FPC 5 disposed outside the bottom 4 of the FPC.
The connector 3 provided on the rigid printed wiring board 2 housed in the case 1 has an insertion portion 19 into which the FPC-side connector 7 is inserted. Housing 20 having
And a plurality of contact terminals 22 which are built in the housing 20 and press-contact a plurality of conductive portions 21 provided on the FPC tongue piece 6. The FPC side connector 7 and the rigid printed wiring board 2 are provided. Since the connection structure of the printed wiring board for connecting the connector 3 is used, the FPC tongue 6 is loosened on the back surface of the bottom portion 4 of the case 1, and the loose FPC tongue may be damaged by other parts or the like. Disappears. Further, on the FPC side, a connector having a built-in terminal can be eliminated, and the number of components is reduced, resulting in cost reduction. In addition, when the rigid printed wiring board 2 to which the instrument main body 8 is attached and fixed is housed in the case 1, the FPC-side connector 7 is necessarily inserted into the connector 3 and is electrically connected. .

Further, 17 round holes provided on the tip side of the FPC tongue piece 6 are inserted into round pins 18 provided inside the bottom part 4 of the case 1, and the FPC tongue piece 6 is fixed to the bottom part 4 of the case 1. As a result, since the FPC tongue piece 6 surely follows the FPC guide 15, when the connectors 3 and 7 are inserted into each other,
The PC tongue piece 6 does not catch on the contact terminal 22 or the connector 3 to cause any trouble.

Further, the rigid printed wiring board 2 and the case 1 can be positioned by inserting the through holes 13 formed in the rigid printed wiring board 2 into the pins 14 provided on the bottom 4 side of the case 1 so that the rigid printed wiring board can be positioned. The position of the connector 3 provided on the wiring board 2 and the position of the FPC-side connector 7 become easy to come out, and an appropriate insertion state of the connectors 3 and 7 can be obtained. Also, even when both connectors 3 and 7 cannot be seen, smooth insertion is possible.

In this embodiment, the round holes 17 provided on the tip side of the FPC tongue piece 6 are fixed to the round pins 18 provided on the bottom 4 of the case 1, but the shape is not limited to the round holes and the round pins. The method and the like may be set as appropriate. Further, the FPC tongue 6 may be fixed to the FPC guide 15 instead of the bottom 4 of the case 1.

As shown in FIG. 1, the contact terminal 22 presses the conductive part 21 of the FPC tongue piece 6 from one direction. The connector 7 may be sandwiched.
Also, the FPC 5 is disposed outside the bottom 4 of the case 1,
It is possible even if it is arranged inside the bottom 4 of the case 1.

[0019]

According to the present invention, a connector provided on a rigid printed wiring board housed in a case, and an FP provided on the bottom of the case.
C is a connection structure of a printed wiring board that performs electrical conduction by connecting to an FPC side connector provided in C,
The FPC-side connector is an FPC standing inside the bottom of the case.
A PC guide, and an FPC tongue bent along the FPC guide.
A housing having an insertion portion into which the side connector is inserted,
The FPC tongue is loosened on the bottom back surface of the case because the contact terminal is built into the housing and presses the FPC tongue against the other part. It will not be.
Further, on the FPC side, a connector having a built-in terminal can be eliminated, and the number of components is reduced, resulting in cost reduction.

Also, the FPC tongue is fixed to the bottom of the case or the FPC guide, so that the FPC tongue
Since the FPC tongue piece is securely along the C guide, the FPC tongue does not catch on the contact terminal or the connector when the connectors are inserted, so that there is no trouble.

In addition, by providing the positioning means for positioning the rigid printed wiring board and the case, the positioning between the rigid printed wiring board and the case can be performed. Therefore, the connection between the connector provided on the rigid printed wiring board and the FPC side connector can be achieved. The position becomes easy to come out, and a proper insertion state between the connectors can be obtained. Even if both connectors are not visible, smooth insertion is possible.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a connection structure of a printed wiring board according to an embodiment of the present invention.

FIG. 2 is a partial front view of the FPC showing a portion of the FPC tongue piece of the embodiment.

FIG. 3 is a sectional view of a main part of a connection structure of a printed wiring board showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Rigid printed wiring board 3 Connector 4 Bottom part 5 FPC 6 FPC tongue piece 7 FPC side connector 13 Through-hole (positioning means) 14 Pin (positioning means) 15 FPC guide 19 Insertion part 20 Housing 22 Contact terminal

Claims (3)

[Claims] 1. A connector provided on a rigid printed wiring board housed in a case, and an FP provided on a bottom of the case.
C is a connection structure of a printed wiring board that performs electrical conduction by connecting to an FPC side connector provided in C,
The FPC-side connector is an FPC standing inside the bottom of the case.
A PC guide, and an FPC tongue bent along the FPC guide.
A housing having an insertion portion into which the side connector is inserted,
A connection structure for a printed wiring board, comprising: a contact terminal which is built in the housing and presses the FPC tongue. 2. The printed wiring board connection structure according to claim 1, wherein said FPC tongue is fixed to a bottom portion of a case or an FPC guide. 3. The printed wiring board connection structure according to claim 1, further comprising positioning means for positioning the rigid printed wiring board and the case.