WO2006074601A1

WO2006074601A1 - Electric connecting device

Info

Publication number: WO2006074601A1
Application number: PCT/CN2006/000033
Authority: WO
Inventors: Zhenhua Wang; Wenjian Li; Guodong Zhang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2005-01-12
Filing date: 2006-01-10
Publication date: 2006-07-20
Also published as: CN1805219A

Abstract

An elcetric connecting device includes a pressing type connector with pressing pins, a flexible printed circuit board and a rigid base. The rigid base has insulated through holes which correspond to and mate with the pressing pins. The flexible printed circuit board has conductive holes which correspond to and mate with the pressing pins also. The pressing pins pass through the insulated holes of the rigid base and the conductive holes of the flexible printed board so as to be connected to the conductive pattern of the flexible printed board.

Description

Connecting device

Technical field

The present invention relates to a connection technology in the field of electronics or communication, and specifically relates to a connection device between a flexible printed circuit board (FPC) and a connector. Background technique

A flexible printed circuit board made of a flexible substrate is a technology developed in parallel with a rigid PCB board. It is light, thin, and bendable, providing a stable and reliable signal path. FPC can be bent in three-dimensional space, which can reduce the size of the occupied space of the component and reduce the hardware cost. At the same time, the light weight and strong bending resistance can effectively improve the anti-vibration and anti-vibration performance of the product; FPC also has excellent heat resistance. , heat dissipation and shielding characteristics, high system integration, suitable for high-frequency high-speed signal transmission, widely used in computers, micro-portable electronic products, military / civilian communication products, aerospace and other fields.

In the relatively compact structure installation space, FPC is used to replace the bulky cable, and the interconnection between the boards can be completed, which can reduce the cable cost, improve the complicated assembly operation, and meet the miniaturization requirements, as shown in Figure 1. The terminals of the FPC 1 are respectively inserted into the FPC connectors 4 fixed on the rigid PCB 2 to realize interconnection between the rigid PCBs 2. FPC 1 can also increase its strength and improve mechanical stability by using reinforcements or liners.

FPC replaces the cable to achieve rigid interconnection between PCBs, and more FPC connectors are used. As shown in FIG. 2, a conventional FPC connector 4 includes a socket 5 that is plugged into the plug end of the FPC 1; the FPC connector 4 is soldered to the rigid PCB 2, and the plug end of the FPC 1 is inserted. The socket 5 of the FPC connector 4 is then locked and fixed. With FPC connectors, the FPC connector on rigid PCBs needs to be assembled using a soldering process with the following drawbacks:

1. The number of contact pins of the FPC connector is limited, usually within 50 pins. When there are more interconnect signals, the product design requirements cannot be met. Multiple devices are required, which increases the size of the rigid PCB and limits the product design.

2. The FPC connector has strict requirements on the thickness and width of the FPC, which increases the design and manufacturing difficulty of the FPC;

3. When the FPC connector is usually soldered on a rigid PCB, the positioning is difficult and the assembly process is complicated. When the connector fails, the rigid PCB is difficult to repair; 4. When the FPC is interconnected with the rigid PCB, the insertion and removal is inconvenient;

5. FPC connectors are more expensive than other connectors;

In the prior art, the FPC is also directly soldered to a rigid PCB by a hot-bar process. Due to the compact structure of the FPC connection, the FPC is directly soldered to the rigid PCB. Although this can save the connector cost, the assembly process is complicated, and the hot pressing process requires special assembly equipment during assembly, and usually cannot be repaired normally. Rework, easy to damage the FPC, resulting in scrap.

Summary of the invention

The technical problem to be solved by the present invention is to provide a connecting device which solves the problems of manufacturing difficulties in the prior art, complicated assembly process, difficulty in maintenance of rigid PCB, inconvenience in plugging and unloading operation, and high cost.

The technical solution adopted by the present invention to solve the technical problem thereof is:

A connecting device comprising a crimp type connector with a crimp pin and a flexible printed circuit board, further comprising a rigid substrate having a position corresponding to the crimp pin and ensuring the crimping An insulating through hole through which the bow I can pass and cooperate, the end of the flexible printed circuit board having a conductive position corresponding to the position of the crimping pin and ensuring that the crimping pin can pass through and cooperate a through hole, the crimping pin passes through the insulating through hole of the rigid substrate; on a side of the rigid substrate opposite to the crimping type connector, the crimping pin passes through the The conductive via of the flexible printed circuit board is electrically connected thereto.

The flexible printed circuit board and the rigid substrate are fixed by adhesive bonding on the bonding surface.

The crimping pin is connected to the conductive via of the flexible printed circuit board by soldering.

The crimping pin has a crimping edge portion in its length direction, and the thickness of the rigid substrate ensures that the insulating through hole accommodates the crimping blade portion.

The rigid substrate is a laminate.

The rigid substrate is a plastic plate.

The rigid substrate is a metal plate.

The technical effects brought by the technical solution of the present invention are: 1. The selection range of crimp type connectors is large, the application process of connectors is mature, and there are fewer restrictions on product design;

2. The crimping type connector has less restrictions on the thickness and width of the FPC, and the reliability of welding with the FPC after fixing by the reinforcing plate is high;

3. The connector assembly is welded by through-hole clamping and crimping. The positioning accuracy is high and the assembly process is simple. There are no special requirements for PCB material, design and production, and the engineering design difficulty and engineering cost are low.

4. The connector can be detached and installed. It is easy to repair in the case of failure of the welding device. It can realize the replacement of the flexible PCB without removing the rigid PCB, which will not have a big impact on the normal operation of the system. 5. Operation when interconnecting with the rigid PCB board Convenience.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

Figure 1 is a schematic diagram of the interconnection of an existing EPC and a rigid PCB;

Figure 2 is a perspective view of the FPC connector;

3 is a schematic view showing the assembly of a crimp type connector, a reinforcing plate, and an FPC;

Figure 4 is an enlarged view of a portion A in Figure 3.

detailed description

A connection device between the FPC and the crimp type connector is shown in FIG. The crimping type connector 6 is mature in process, has a large selection range, and has fewer restrictions on product design, and is easier to meet product design requirements than FPC connectors. The bottom of the crimp type connector 6 is provided with a set of pins 601. The number of pins of the pin 601 is determined according to the needs of the connector. Usually, the pin 601 has a crimping edge portion 602 along its length, so that When the pin 601 is engaged with the hole, it can be closely attached to the hole wall to maintain a good positioning. A rigid reinforcing plate 7 is attached to the end of the FPC 1, and the rigid reinforcing plate 7 serves as a substrate for the FPC 1, and functions as a reinforcement.

As shown in FIG. 4, on the rigid reinforcing plate 7 and the FPC 1, there are through holes 701 and 101 corresponding to the pins 601 of the crimp type connector 6, and the two sets of through holes 701 and 101 are respectively aligned, wherein the through holes are respectively 701 is an insulating hole made of an insulating material, and the through hole 101 is a conductive hole made of a conductive material. The bottom pin 601 of the crimp type connector 6 is inserted into the through holes 701 and 101 from the opposite side of the FPC 1 on the rigid reinforcing plate 7, the bottom of the crimp type connector 6 and the rigid reinforcing plate 7 The mating surface is in close contact with the crimping edge portion 602 on the pin 601 in the through holes 701 and 101, and the pin 601 is electrically connected to the through hole 101 of the FPC 1. To ensure good electrical connection between pin 601 and FPC 1, pin 601 and FPC 1 are soldered separately.

The aperture of the through hole 701 of the rigid reinforcing plate 7 should ensure that the pin 601 can be inserted or press-fitted, that is, when the pin 601 is elastic, the aperture of the through hole 701 can be slightly smaller than the maximum lateral dimension of the pin 601; When the rigidity of 601 is rigid, the aperture of the through hole 701 is slightly smaller than the maximum lateral dimension of the pin 601. At this time, the pin 601 has an interference fit with the through hole 701. Of course, the aperture of the through hole 701 may be greater than or equal to the maximum of the pin 601. The lateral dimension, at this time, the pin 601 is mated with the through hole 701. Although the dynamic matching of the pin 601 and the through hole 701 is disadvantageous for the fixing of the crimp type connector 6, the electrical connection between the pin 601 and the FPC 1 is not affected. The rigid reinforcing plate 7 may be a PCB laminate such as FR4, or a plastic plate or a metal plate. When the rigid reinforcing plate 7 is made of a metal plate, the mating surface and the through hole of the rigid reinforcing plate 7 and the crimp type connector 6 and the FPC 1 701 should be insulated.

The thickness of the rigid reinforcing plate 7 is such as to ensure that the connector pin crimping edge portion 602 is accommodated, and that the protruding portion of the connector pin 601 does not damage the disk of the through hole 101 of the FPC 1, and a good connection effect can be obtained.

The bonding surface of the rigid reinforcing plate 7 and the FPC 1 is bonded and fixed by an adhesive to obtain a good fitting effect.

The technical effects brought by the technical solution of the present invention are:

1. The selection range of the crimp type connector is large, the application process of the connector is mature, and the product design restrictions are less;

Claims

Rights request

What is claimed is: 1. A connection device comprising a crimp type connector with a crimp pin and a flexible printed circuit board, further comprising: a rigid substrate, the rigid substrate having a position corresponding to the crimp pin And ensuring that the crimping pin can pass through and cooperate with the insulating through hole, and the end of the flexible printed circuit board has a position corresponding to the crimping pin and ensures that the crimping pin can be worn And a conductive via hole that passes through, the crimping pin passes through the insulating through hole of the rigid substrate; on a side of the rigid substrate opposite to the crimp type connector, the pressure A pin is passed through the conductive via of the flexible printed circuit board and electrically connected thereto.

The connecting device according to claim 1, wherein the flexible printed circuit board and the rigid substrate are bonded and fixed by an adhesive on a bonding surface.

3. The connecting device according to claim 1, wherein: the crimping pin is connected to the conductive via of the flexible printed circuit board by soldering.

The connecting device according to claim 1 or 2 or 3, wherein: the crimping pin has a crimping blade portion in a longitudinal direction thereof, and the thickness of the rigid substrate ensures the insulating through hole is accommodated The crimping blade portion.

The connecting device according to claim 4, wherein the rigid substrate is a laminate.

The connecting device according to claim 4, wherein the rigid substrate is a plastic plate.

The connecting device according to claim 4, wherein the rigid substrate is a metal plate.