JPH054703Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a connector attachment device that is fixed to an electrical device and is used to establish an electrical connection with an external device.

[Conventional technology]

Generally, various electrical instruments such as speedometers and tachometers installed in vehicles such as automobiles and motorcycles are housed and fixed inside a case, and the instrument body is mounted on the back or side of the case. A printed wiring board is provided on which a plurality of conductive paths are printed and electrically connected to the printed wiring board, a connector is fixed to this printed wiring board, and a connector is connected to an external device such as a car battery or a rotation detection sensor. By connecting the external terminals, an electrical connection is established to drive the instrument body, etc. As disclosed in, for example, Japanese Utility Model Application Publication No. 54-167392, the connector is known to have a structure in which it is reliably held by a plurality of support pieces erected on a printed wiring board.

In recent years, this type of printed wiring board has been developed to be able to form complicated wiring patterns in an orderly manner, to be able to follow the case even if it has a complex external shape with steps, and to be thinner and lighter. A flexible printed wiring board (hereinafter abbreviated as FPC), which has a conductive path formed on a flexible film, is used. By the way, since the support piece cannot be erected on this FPC, when fixing a connector to the FPC, the configurations shown in FIGS. 3 and 4 have been proposed.

That is, the connector 1, which has an upward opening for connecting external terminals and has terminals (not shown) mounted inside, connects to the FPC via the flat reinforcing body 2.
The lower ends of the terminals pulled out from the bottom of the connector 1 are passed through the reinforcing body 2 and the FPC 3 to form the bent pieces 4. By soldering the connection part 5 of the piece 4, the FPC
Connector 1 is fixed to 3. In particular, the electrical connection work between the terminal and the connecting portion 5 is performed using the reinforcing body 2.
Since it is flat, even if the reinforcing body 2 is placed on the bending piece 4 in advance, the bending piece 4 can be maintained in a horizontal state without bending, and the conductive path forming surface of the FPC 3 can be submerged in the molten solder bath. Alternatively, a plurality of terminals can be soldered to the connection part 5 at the same time by applying molten solder using a jet method, and then the lower ends of the terminals are cut off with a cutter. This method significantly reduces assembly man-hours compared to manual soldering work, and ensures reliable energization. Then, a mounting boss 7 is provided upright on the case 6, the FPC 3 is arranged along the case 6, the bending piece 4 is folded back, and the fixing member 8 is attached to the mounting boss 7 on both side edges of the reinforcing body 2. to fix the connector 1 to the case 6 via the reinforcing body 2. Note that the means for fixing the case 6 and the reinforcing body 2 is as follows:
Instead of using the fixing member 8, a positioning pin may be provided at the tip of the mounting boss 7, and this pin may be press-fitted into the through hole of the reinforcing body 2 and locked.

[The problem that the idea aims to solve]

However, in the conventional example, the bent portion 9 of the curved bent piece 4 located between the case 6 and the reinforcing body 2 is exposed facing the outside. There is a concern that the assembled parts or the like may come into contact with the bent portion 9, and there is a fear that such external interference may damage the FPC 3 and cause poor continuity.

[Purpose of invention]

The present invention has been devised by focusing on the problems of the conventional example, and includes a connector in which a bent piece of an FPC is folded back and a connector electrically connected to a connecting part of the bent piece is fixed to a case. The purpose of the present invention is to provide a connector mounting device that can easily make an electrical connection between the terminal of the FPC and the connection part of the FPC, and that can prevent damage to the FPC due to external interference and obtain a good current conduction state. .

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention arranges a flexible printed wiring board in a case, and folds and bends a part of the flexible printed wiring board so that the surfaces forming conductive paths of the flexible printed wiring board face each other. a connector is provided on the back side of the connecting portion of the bent piece through a reinforcing body, and the terminals of the connector are passed through the reinforcing body and the bent piece to be electrically connected to the connecting portion,
In the connector mounting device for fixing the connector to the case via the reinforcing body, a protective wall facing the bent portion of the bent piece is integrally formed with the case.

[Effect]

The bending portion between the case and the reinforcement body is protected from external interference by the protective wall. Also,
By integrally forming the protective wall with the case, a substantially flat reinforcing body is placed on the bending piece to prevent electrical connection between the terminals of the connector and the connection part of the FPC while the bending piece is maintained in a horizontal state without bending. It is also possible to make the connection with an automatic soldering machine.

〔Example〕

1 and 2 show an embodiment of the present invention, in which the case 10 has a step and a high surface 1.
1. A step surface 13 is provided that connects the low surface 12 and the high surface 11 and the low surface 12, and a connector 14 is attached to the low surface 12 to connect to an external terminal (not shown) routed from an external device. A pair of mounting bosses 15 each having a screw hole drilled therein, and a pair of bosses 17 having a positioning pin 16 erected at the tip thereof are arranged side by side at a predetermined distance apart, and these mounting bosses 15 and A flat protective wall 18 is provided upright on the outer surface side of the case 10 relative to the positioning pin 16, and the mounting boss 15, the boss 17 and the protective wall 1
8 are all formed to have substantially the same height.

Further, a conductive path 19 is formed of copper foil or the like on a flexible film such as polyester, and at least the conductive path 19 is coated with an insulating coating.
The FPC 20 is arranged on the high surface 11, and this FPC 20
A bending piece 21 having flexibility that can be folded back independently is separately formed on a part of 0, and this bending piece 21 is disposed along the lower surface 12, and a conductive path 19 of a part of the bending piece 21 is formed. a connecting portion 23 for electrically connecting the terminal 22 of the connector 14 by removing the insulating coating of the connector 14;
In addition, an appropriate number of through holes 24 are bored in the surface facing the connector 14.

The connector 14 has mounting holes 25, corresponding to the screw holes and positioning pins 16 of the mounting boss 15,
A pair of mounting arms 27 having holes 26 are provided,
The lower ends of the plurality of terminals 22 which are arranged on the back side of the connecting part 23 of the bending piece 21 via the reinforcing body 28 and housed and fixed inside are soldered to make an electrical connection to the connecting part 23. Fixed to FPC20.

The reinforcing body 28 has a substantially L-shaped cross section that abuts the connector 14, and
a through hole 29 through which the
1 is bored, and the storage part 3 is formed into an inverted U shape so that the free end of the bent piece 21 is inserted into the vertical wall part.
2 is provided, and furthermore, a flange portion 33 is provided integrally and continuously from the vertical wall portion, and a plurality of engagement convex portions 34 are provided protruding from the lower surface of this flange portion 33. On the other hand, a plurality of locking pins 35 are provided protruding from the lower surface of the reinforcing body 27 to press fit into the through holes 24 and temporarily fasten the bent pieces 21 .

The assembly work of this embodiment will be explained below.

First, the free end of the bent piece 21 of the FPC 20 is inserted into the storage part 32, and the locking pin 35 of the reinforcing body 28 is press-fitted into the through hole 24, so that the back surface of the connecting part 23 is positioned in the through hole 29. It is temporarily fixed to the lower surface of the reinforcing body 28 so as to

Next, the connector 14 is made to electrically It is fixed to the bending piece 21 via the reinforcing body 28 while being connected to the bending piece 21 . In this case, when the bending piece 21 is temporarily fixed, by inserting the locking pin 35 into the through hole 24, the surface of the reinforcing body 28 that the bending piece 21 comes into contact with is
Since there are no relatively large protrusions, the bending piece 21 can be kept in a horizontal state along with the entire FPC 15, and when performing electrical connection work using an automatic soldering device, the bending piece 21 and the entire back side of the FPC 15 can be kept in a horizontal state. By contacting the molten solder, the solder adheres only to the conductive parts, so the locking pin 35 and
Soldering between the terminals 22 and the connecting portions 23 is easy because no solder adheres to the other surfaces of the back side of the FPC 15 than the connecting portions 23. The FPC 20 is disposed on the high surface 11 of the case 10, and the bent piece 21 is arranged on the stepped surface 11 of the case 10.
3 and is arranged on the lower surface 12.

After that, the bending piece 21 is folded back so that the receiving port of the connector 14 is opened upward so that the surfaces forming the conductive path 19 face each other, and the positioning pins 16 are inserted into the mounting holes 25 and 30 to attach the reinforcing body. 28 is positioned and disposed while contacting the upper ends of the mounting boss 15, boss 17, and protection wall 18, and is positioned in the engagement recess 36 bored in the high surface 11 of the case 10.
The connector 14 is fixed to the case 10 and assembled by engaging the engagement protrusion 34 via the FPC 20, inserting it through the mounting holes 26 and 31, and tightening the fixing member 37 to the screw hole of the mounting boss 15. complete.

Therefore, the bent portion 38 of the bent piece 21
Although it is located in the space between the lower surface 12 of the case 10 and the reinforcing body 27, its external side is hidden facing the protective wall 18, so it is not possible to block external interference.
Damage to FPC20 can be prevented. In addition, protective wall 1
Since 8 is integrally formed with the case 10, it is possible to easily solder the terminal 22 of the connector 14 to the connecting portion 23 of the bending piece 21 via the reinforcing body 28, and the number of parts can be increased. assembly work can be simplified.

In addition, in this embodiment, the engagement convex portion 34 is engaged with the engagement recess 36 of the case 10 while suppressing the floating of the FPC 20 disposed on the high surface 11 at the flange portion 33 of the reinforcing body 28, and the reinforcement Since the lower surface of the body 28 is in contact with the protective wall 28, the connector 1
Connector 1 when connecting 4 and external terminals
By more effectively regulating the wobble of FPC2
An additional effect is that excessive bending stress can be prevented from being applied to the bent portion 38 of 0.

Note that the protective wall 18 is not necessarily limited to a flat plate shape, but has a bent portion 3 to prevent external interference.
As long as it is erected facing 7, it can be modified as appropriate, such as a comb-like shape consisting of a plurality of divided flat plates or cylindrical bosses.

Further, in the embodiment described above, the mounting arm 26 of the connector 14 is fixed to the case 10 together with the reinforcing body 27, but the connector 14 is integrated with the reinforcing body 27 by a fixing means such as hook engagement. In such a case, only the reinforcing body 27 may be fixed to the case 10.

[Effect of idea]

In the present invention, a flexible printed wiring board is disposed in a case, a part of the flexible printed wiring board is folded back so that the surfaces forming conductive paths of the flexible printed wiring board face each other, and a bent piece is provided. A connector is arranged on the back side of the connecting part of the connector via a reinforcing body, and the terminals of this connector are passed through the reinforcing body and the bending piece to be electrically connected to the connecting part, and the connector is connected to the connector through the reinforcing body. In the connector mounting device fixed to the case, a protective wall facing the bent portion of the bending piece is integrally formed in the case, and an automatic soldering device is used to electrically connect the terminal and the connecting portion. When using a protective wall, it is possible to prevent external interference from the outside of the bent part while maintaining the simple effect.
It is possible to provide a connector mounting device that has extremely high practical value, such as being able to prevent damage to the FPC and obtain a good energization state.

[Brief explanation of the drawing]

FIGS. 1 and 2 are an exploded perspective view and a sectional view of a main part showing an embodiment of the present invention, and FIGS. 3 and 4 are a front view and a sectional view of a main part of a conventional example. 1, 14... Connector, 2, 28... Reinforcement body,
3, 20... FPC (flexible printed circuit board), 4, 21... bending piece, 5, 23... connection part,
6, 10... Case, 9, 38... Bent part, 1
8... Protective wall, 19... Conductive path, 22... Terminal.

Claims (1)

[Scope of utility model registration request] A flexible printed wiring board is arranged in a case, a bent piece is provided by folding back a part of the flexible printed wiring board so that the surfaces forming the conductive path of the flexible printed wiring board face each other, and a back side of the connection part of the bent piece is provided. A connector is arranged through a reinforcing body, a terminal of the connector is passed through the reinforcing body and the bending piece, and electrically connected to the connection part, and the connector is fixed to the case through the reinforcing body. 1. A connector mounting device according to the present invention, characterized in that a protective wall facing a bent portion of the bent piece is integrally formed with the case.