Switching device of multi-layer rigid-flex printed circuit board

Abstract

The utility model discloses a switching device of a multilayer rigid-flex board, which comprises a rigid board, a flexible board and a switching device, the flexible board is connected with one end of the rigid board, the switching device comprises a base, the rigid board is arranged on two sides of the base and connected with the base, and the base is provided with a contact pin. According to the utility model, the large-size rigid-flex printed circuit board for transmitting multiple signals is split into a plurality of short rigid-flex printed circuit boards at proper positions for respective production; and finally, the short rigid-flex boards are connected together by using the switching device, so that the use requirements of the large-size multi-signal rigid-flex board are met. According to the utility model, the processing difficulty of the large-size flexible plate is reduced, the reject ratio and the production time of products are reduced, the cost is reduced, and the reliability and the operability of the products are improved at the same time.

Description

Technical Field

[0001] The utility model belongs to the technical field of rigid-flex boards, and in particular relates to a switching device for a multi-layer rigid-flex board. Background Art

[0002] Rigid-flex PCBs have the advantages of lightweight, integration and integration in current electronic and electrical systems. With the rapid development of electronic and electrical systems, the application of rigid-flex PCBs has begun to develop towards complete machines. Therefore, large-sized rigid-flex PCB products with many types of transmission signals will appear. However, such products are difficult to process and have a high scrap rate, resulting in high costs. This phenomenon seriously restricts the use of rigid-flex PCBs in complete machines.

[0003] The conventional method of board removal and transfer is to use a pair of plug and socket connectors for transfer or direct welding of contacts. A pair of plug and socket connectors for transfer requires a large installation space and fixing space, and this method cannot be used when space is limited. Direct welding of contacts has low reliability, low operability, and high labor hours.

[0004] The patent document with the announcement number CN203368931U discloses a connector rigid-flexible board structure, including a first rigid circuit board and a second rigid circuit board, a bendable flexible circuit board is arranged between the first rigid circuit board and the second rigid circuit board, one end of the flexible circuit board is connected to the first rigid circuit board, and the other end of the flexible circuit board is connected to the second rigid circuit board, the first rigid circuit board is provided with a first connection part, and the second rigid circuit board is provided with a second connection part. The utility model adopts two rigid circuit boards connected by a flexible circuit board, so that the entire circuit board can be connected through wiring. This structural setting can make the signal transmission channel formed by the electronic components on the connector circuit board shorter and more regular, thereby reducing the signal loss and electromagnetic interference during the signal transmission process, and ensuring the stability and integrity of high-frequency signal transmission. However, the structure needs to set pins, which increases the overall volume and occupies a large installation space and fixed space.

[0005] The patent document with announcement number CN220042333U discloses a rigid-flexible connector assembly, which relates to the field of connector technology, including: a female connector; a male connector connected to the female connector; a female bayonet pin installed on the female connector and located on one side of the female connector; a secondary lock installed at a top corner of the female connector away from the male connector; a female hard and soft board installed between the female connector and the male connector and located below the female bayonet pin; a male head, one end of which is installed on the female hard and soft board and the other end is installed on the male connector; in order to achieve the purpose of eliminating the static terminal in the connector, the entire product is only a mechanical component assembly, and no welding process is required, which simplifies the relevant steps. This structure is more responsible than the present application and has a higher production cost. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a switching device for a multi-layer rigid-flex board.

[0007] The utility model is realized through the following technical solutions.

[0008] The utility model provides a switching device for a multi-layer rigid-flexible board, comprising a rigid board, a flexible board and a switching device, wherein the flexible board is connected to one end of the rigid board, the switching device comprises a base, the rigid boards are arranged on both sides of the base and connected, and contact pins are arranged on the base.

[0009] Preferably, bosses are respectively arranged on the edges of both sides of the base, and the bosses are extended along the length direction of the base. The contact pins penetrate the base, and the contact pins are symmetrically arranged on the base in the center.

[0010] Preferably, the height of the boss is smaller than the height of the contact pin, and the boss is arranged on the bottom surface and the top surface of the base.

[0011] Preferably, a through hole is provided on the rigid plate, and a diameter of the through hole is larger than a diameter of the contact pin.

[0012] Preferably, the diameter of the through hole is greater than the diameter of the contact pin by more than 0.05 mm.

[0013] Preferably, one end of the rigid board is connected to a plurality of flexible boards, and the width of the rigid board is greater than the width of the flexible board.

[0014] Preferably, the rigid plate is connected to the base by welding, and the width of the rigid plate is greater than the width of the base.

[0015] The beneficial effects of the utility model are:

[0016] The transfer device in the present utility model is flexible and diverse. The shape of the transfer device and the number of contact pins can be adjusted according to the actual product usage space and the types and quantities of signals transmitted by the rigid-flexible printed circuit board. At the same time, structural mounting holes can also be provided on the rigid board and the transfer device to fix the structure at the transfer location.

[0017] The present utility model disassembles a large-size rigid-flexible printed circuit board for transmitting multiple signals into several short rigid-flexible printed circuit boards at appropriate positions for separate production; finally, the short rigid-flexible printed circuit boards are connected together by a transfer device, thereby meeting the usage requirements of the large-size multi-signal rigid-flexible printed circuit board. The present utility model reduces the processing difficulty of large-size flexible boards, reduces the defective rate and production man-hours of products, reduces costs, and at the same time improves the reliability and operability of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is a schematic structural diagram of the rigid board and the flexible board of the present utility model;

[0020] Figure 3 is a schematic structural diagram of the transfer device of the present utility model;

[0021] In the figure: 1 - rigid board, 2 - flexible board, 3 - transfer device, 11 - through hole, 31 - base, 32 - contact pin, 33 - boss. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions of the present utility model will be further described below, but the scope of protection is not limited thereto.

[0023] Embodiment:

[0024] As Figures 1-3 shown, a transfer device for a multi-layer rigid-flexible printed circuit board includes a rigid board 1, a flexible board 2, and a transfer device 3. The flexible board 2 is connected to one end of the rigid board 1. The transfer device 3 includes a base 31. The rigid board 1 is disposed on both sides of the base 31 and connected. Contact pins 32 are provided on the base 31.

[0025] Bosses 33 are respectively provided at the edges on both sides of the base 31. The bosses 33 extend along the length direction of the base 31. The bosses 33 can improve the tin penetration rate during soldering. The contact pins 32 penetrate through the base 31. The contact pins 32 are symmetrically arranged in the center of the base 31, ensuring the fixed position of each contact pin 32 and facilitating subsequent operations.

[0026] The height of the bosses 33 is less than the height of the contact pins 32. The bosses 33 are provided on the bottom surface and the top surface of the base 31.

[0027] A through hole 11 is provided on the rigid board 1, and the diameter of the through hole 11 is larger than the diameter of the contact pin 32. The contact pin 32 penetrates through the rigid board 1 through the through hole 11.

[0028] The diameter of the through hole 11 is more than 0.05 mm larger than the diameter of the contact pin 32, preferably 0.15 mm, which is convenient for the contact pin 32 to be inserted into the through hole 11. The through hole 11 is a metallized through hole, and the metallization thickness and quantity can be customized according to the type and quantity of signals transmitted by the rigid-flex board. At the same time, the through hole 11 is also a carrier for signal transmission of the rigid-flex board.

[0029] One end of the rigid board 1 is connected to a plurality of flexible boards 2 serving as signal transmission carriers, and the width of the rigid board 1 is larger than the width of the flexible board 2. The flexible boards 2 are only pressed together in the area of the rigid board 1, and the remaining flexible areas still have good bending performance.

[0030] The rigid board 1 is welded to the base 31, and the width of the rigid board 1 is larger than the width of the base 31.

[0031] An installation method for a transfer device of a multi-layer rigid-flex board includes the following steps:

[0032] First, perform pre-assembly. Insert the rigid board 1 provided with the customized through hole 11 into the front and back sides of the transfer device 3 respectively. After no abnormality is found in the insertion, weld one rigid board 1 to the transfer device 3 with high-temperature solder, and then weld the other rigid board 1 to the other side of the transfer device 3 with low-temperature solder. By using this method, it can be prevented that when welding the last side, the solder on the other side melts again due to too high temperature. After welding is completed, perform a three-proof treatment on the metal-exposed parts of the rigid board 1 and the transfer device 3 to improve the product reliability.

Claims

1. A switching device for a multi-layer rigid-flex board, characterized in that: The invention comprises a rigid board (1), a flexible board (2) and a switching device (3), wherein the flexible board (2) is connected to one end of the rigid board (1), the switching device (3) comprises a base (31), the rigid board (1) is arranged on both sides of the base (31) and connected, and a contact pin (32) is arranged on the base (31).

2. A multi-layer rigid-flex board transfer device as claimed in claim 1, characterized in that: Bosses (33) are respectively arranged on the edges of both sides of the base (31), and the bosses (33) are extended along the length direction of the base (31). The contact pins (32) penetrate the base (31), and the contact pins (32) are symmetrically arranged in the center of the base (31).

3. A multi-layer rigid-flex board transfer device as claimed in claim 2, characterized in that: The height of the boss (33) is smaller than the height of the contact pin (32), and the boss (33) is arranged on the bottom surface and the top surface of the base (31).

4. The switching device of a multi-layer rigid-flex board according to claim 1, characterized in that: A through hole (11) is provided on the rigid plate (1), and the diameter of the through hole (11) is greater than the diameter of the contact pin (32).

5. A multi-layer rigid-flex board transfer device as claimed in claim 4, characterized in that: The diameter of the through hole (11) is greater than the diameter of the contact pin (32) by more than 0.05 mm.

6. The switching device of a multi-layer rigid-flex board according to claim 1, characterized in that: One end of the rigid board (1) is connected to a plurality of flexible boards (2), and the width of the rigid board (1) is greater than the width of the flexible board (2).

7. The switching device of a multi-layer rigid-flex board according to claim 1, characterized in that: The rigid plate (1) is connected to the base (31) by welding, and the width of the rigid plate (1) is greater than the width of the base (31).

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