Waterproof FPC flexible circuit board

Abstract

The utility model provides a waterproof FPC flexible circuit board, which comprises a circuit board, one end of the circuit board is provided with an upper buckling box and a lower buckling box, one end of the lower buckling box is fixedly connected with a sleeve, the tail end of the sleeve is fixedly connected with an expansion tube, a signal line is inserted in the sleeve, sealing gaskets are arranged in the upper buckling box and the lower buckling box, and the expansion tube is fixedly connected with the expansion tube. A plurality of threaded holes are formed in the upper buckling box and the lower buckling box, a plurality of bolts are arranged on the upper buckling box, and a plurality of inserting plates are fixedly connected to the lower buckling box. The utility model has the advantages that by arranging the structures such as the upper buckling box and the lower buckling box, when the signal line is connected with the circuit board, the circuit board is inserted into the sleeve from the expansion tube and penetrates into the lower buckling box to be connected with the circuit board, and then the upper buckling box is fixed on the lower buckling box. And glue is injected into the sleeve through the expansion pipe to block the sleeve, so that external water can be prevented from entering the lower buckle box and the upper buckle box from the signal line insertion part, and the waterproof performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of flexible circuit board technology, and in particular to a waterproof FPC flexible circuit board. Background Technology

[0002] Flexible printed circuit boards (FPCs) are highly reliable and extremely flexible printed circuit boards made with polyimide or polyester film as the substrate. They are characterized by high wiring density, light weight, thinness, and good bending flexibility.

[0003] For example, a waterproof flexible circuit board (FPC) with publication number CN212628608U uses a connecting mechanism between a first and second clip to securely connect the first and second clips after the signal line is connected to the circuit board, ensuring the stability of the wiring terminals. The first and second sealing gaskets provide a seal after the signal line is connected to the circuit board, improving the waterproof performance of the wiring terminals and ensuring the normal use of the circuit board. However, since the signal line is inserted into the first and second clips from the side, external water may seep into the first and second clips from the insertion point, potentially affecting the wiring terminals. Therefore, a waterproof FPC is proposed as an improvement. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to provide a waterproof FPC flexible circuit board to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, one embodiment of the present invention provides a waterproof FPC flexible circuit board, including a circuit board, one end of which is provided with an upper cover box and a lower cover box, one end of which is fixedly connected to a sleeve, the end of which is fixedly connected to an expansion tube, and a signal line is inserted into the sleeve.

[0007] Both the upper and lower snap boxes are equipped with sealing gaskets. The upper and lower snap boxes are provided with several threaded holes. The upper snap box is provided with several bolts. The lower snap box is fixedly connected with several insert plates. Insertion pads are sleeved on the outside of the insert plates. The upper snap box is provided with several slots, and sleeve pads are provided in the slots.

[0008] Preferably, as described in any of the above solutions, the circuit board has a connecting portion at its end, and the upper and lower snap boxes are matched in shape and size.

[0009] Preferably, of any of the above solutions, the sleeves are of several lengths and are evenly arranged at the end of the lower buckle box, and both the upper buckle box and the lower buckle box have semi-circular grooves at the sleeve positions.

[0010] The above technical solution employs an FPC (Flexible Printed Circuit) board, which features high wiring density, light weight, thinness, and good flexibility. A connection section is provided at the end of the circuit board for connecting to signal lines. Upper and lower retaining boxes are installed at the end of the circuit board, providing connection space for the connection section and signal lines, protecting the connection point from damage. A sleeve guides the signal lines, allowing them to be inserted vertically into the lower retaining box, facilitating the connection between the signal lines and the circuit board.

[0011] Preferably, in any of the above schemes, the expansion tube adopts a tapered structure, and a plurality of the threaded holes and bolts are evenly arranged on the upper and lower snap boxes.

[0012] Preferably, in any of the above solutions, the insert plate adopts a structure that gradually tapers from bottom to top, and several insert plates are evenly arranged on the lower snap box.

[0013] The above technical solution employs a tapered structure for the expansion tube, allowing for quicker insertion of the signal cable into the sleeve, improving installation efficiency and facilitating subsequent injection of adhesive into the sleeve. When connecting the signal cable to the circuit board, the circuit board is inserted through the expansion tube into the sleeve and then through the lower junction box, connecting it to the circuit board. The upper junction box is then fixed to the lower junction box. Adhesive is then injected into the sleeve through the expansion tube to seal it, preventing external water from entering the lower and upper junction boxes from the signal cable connection point, thus improving waterproofing.

[0014] Preferably, in any of the above schemes, the slots adopt a structure that gradually tapers from bottom to top, and several of the slots are arranged corresponding to the positions of the insert plate.

[0015] Preferably, in any of the above embodiments, the socket pad is fixedly connected to the inner wall of the slot.

[0016] The above technical solution utilizes a plug-in plate and slots to assist bolts and threaded holes in securing the upper and lower snap-fit ​​boxes together, thus protecting the connection point between the circuit board and the signal line. A plug pad is placed on the outside of the plug-in plate, and a socket pad is placed on the inside of the slot. When the plug-in plate is inserted into the slot, the plug pad and socket pad press against each other, completely filling the gap between the plug-in plate and the slot. This improves the sealing of the connection between the upper and lower snap-fit ​​boxes and enhances the waterproof performance of the connection between the circuit board and the signal line.

[0017] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0018] 1. This waterproof FPC flexible circuit board, through the design of an upper and lower cover box, sleeve, and expansion tube, allows for seamless connection of signal lines to the circuit board. The circuit board is inserted through the expansion tube into the sleeve and then through the lower cover box for connection. The upper cover box is then fixed to the lower cover box. Finally, adhesive is injected into the sleeve through the expansion tube to seal it, preventing external water from entering the lower and upper cover boxes through the signal line connection points, thus improving waterproof performance.

[0019] 2. This waterproof FPC flexible circuit board, through the setting of plug-in plates, plug pads, slots, socket pads and other structures, when the plug-in plate is inserted into the slot, the plug pads and socket pads squeeze each other, so that the gap between the plug-in plate and the slot is completely filled, thereby improving the sealing of the connection between the upper and lower boxes and improving the waterproof performance of the connection between the circuit board and the signal line.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0024] Figure 3 This is a partial structural schematic diagram of the present invention.

[0025] In the diagram: 1-Circuit board, 2-Upper box, 3-Lower box, 4-Sleeve, 5-Extension tube, 6-Signal line, 7-Sealing gasket, 8-Threaded hole, 9-Bolt, 10-Plug, 11-Plug pad, 12-Slot, 13-Socket pad. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] like Figures 1-3 As shown, this utility model includes a circuit board 1. One end of the circuit board 1 is provided with an upper snap box 2 and a lower snap box 3. One end of the lower snap box 3 is fixedly connected to a sleeve 4. The end of the sleeve 4 is fixedly connected to an expansion tube 5. A signal line 6 is inserted into the sleeve 4.

[0029] Both the upper snap box 2 and the lower snap box 3 are equipped with sealing gaskets 7. The upper snap box 2 and the lower snap box 3 are provided with several threaded holes 8. The upper snap box 2 is provided with several bolts 9. The lower snap box 3 is fixedly connected with several insert plates 10. Insertion pads 11 are sleeved on the outside of the insert plates 10. The upper snap box 2 is provided with several slots 12. Insertion pads 13 are provided in the slots 12.

[0030] Example 1: A connecting portion is provided at the end of the circuit board 1, and the upper and lower retaining boxes 2 and 3 are matched in shape and size. Several sleeves 4 are evenly arranged at the end of the lower retaining box 3, and semi-circular grooves are provided at the positions of the upper and lower retaining boxes 2 and 3. The circuit board 1 is an FPC flexible circuit board, which has the characteristics of high wiring density, light weight, thinness, and good bending. A connecting portion is provided at the end of the circuit board 1 for connecting with the signal line 6. The upper retaining box 2 and lower retaining box 3 are provided at the end of the circuit board 1. The upper retaining box 2 and lower retaining box 3 provide connection space for the connecting portion and the signal line 6, and protect the connection point to prevent it from being exposed and damaged. The sleeves 4 provide guidance for the signal line 6, so that the signal line 6 can be inserted into the lower retaining box 3 in a vertical state, which facilitates the connection between the signal line 6 and the circuit board 1.

[0031] Example 2: The expansion tube 5 adopts a tapered structure, with several threaded holes 8 and bolts 9 evenly arranged on the upper and lower retaining boxes 2 and 3. The insert plate 10 adopts a structure that gradually tapers from bottom to top, with several insert plates 10 evenly arranged on the lower retaining box 3. The tapered structure of the expansion tube 5 allows the signal line 6 to be inserted into the sleeve 4 more quickly, improving installation efficiency and facilitating the subsequent injection of adhesive into the sleeve 4. When connecting the signal line 6 to the circuit board 1, the circuit board 1 is inserted into the sleeve 4 through the expansion tube 5 and then through the lower retaining box 3 to connect it to the circuit board 1. Then, the upper retaining box 2 is fixed to the lower retaining box 3. Adhesive is then injected into the sleeve 4 through the expansion tube 5 to seal the sleeve 4, thus preventing external water from entering the lower retaining box 3 and the upper retaining box 2 from the signal line 6 insertion point, improving waterproof performance.

[0032] Example 3: The slot 12 adopts a gradually tapering structure from bottom to top, with several slots 12 corresponding to the positions of the insert plate 10. A socket gasket 13 is fixedly connected to the inner wall of the slot 12. The insert plate 10, in conjunction with the slot 12, assists the bolts 9 and threaded holes 8 in achieving a fixed connection between the upper snap box 2 and the lower snap box 3, thus protecting the connection point between the circuit board 1 and the signal line 6 on the outside. A snap gasket 11 is provided on the outside of the insert plate 10, and a socket gasket 13 is provided on the inside of the slot 12. When the insert plate 10 is inserted into the slot 12, the snap gasket 11 and the socket gasket 13 press against each other, completely filling the gap between the insert plate 10 and the slot 12. This improves the sealing of the connection between the upper snap box 2 and the lower snap box 3, and enhances the waterproof performance of the connection between the circuit board 1 and the signal line 6.

[0033] The working principle of this utility model is as follows:

[0034] S1. Insert the circuit board 1 into the sleeve 4 through the expansion tube 5 and pass it through the lower buckle box 3 to connect it to the circuit board 1.

[0035] S2. Insert the insert plate 10 into the slot 12, and use the bolt 9 to connect the upper snap box 2 and the lower snap box 3 tightly together with the threaded hole 8. The insertion pad 11 and the sleeve pad 13 press against each other, so that the gap between the insert plate 10 and the slot 12 is completely filled.

[0036] S3. Inject adhesive into the sleeve 4 through the expansion tube 5 to seal the sleeve 4.

[0037] Compared with the prior art, the present invention has the following advantages:

[0038] 1. This waterproof FPC flexible circuit board, through the arrangement of an upper snap box 2, a lower snap box 3, a sleeve 4, and an expansion tube 5, allows for seamless connection of the signal line 6 to the circuit board 1. The circuit board 1 is inserted through the expansion tube 5 into the sleeve 4 and then through the lower snap box 3, connecting to the circuit board 1. The upper snap box 2 is then fixed to the lower snap box 3. Finally, adhesive is injected into the sleeve 4 through the expansion tube 5 to seal it, preventing external water from entering the lower snap box 3 and the upper snap box 2 through the signal line 6 connection point, thus improving waterproof performance.

[0039] 2. The waterproof FPC flexible circuit board, by setting up a structure such as a plug plate 10, a plug pad 11, a slot 12, and a socket pad 13, when the plug plate 10 is inserted into the slot 12, the plug pad 11 and the socket pad 13 are squeezed against each other, so that the gap between the plug plate 10 and the slot 12 is completely filled, thereby improving the sealing of the connection between the upper box 2 and the lower box 3, and improving the waterproof performance of the connection between the circuit board 1 and the signal line 6.

Claims

1. A waterproof FPC flexible circuit board, comprising a circuit board (1); characterized in that, The circuit board (1) is provided with an upper box (2) and a lower box (3) at one end. A sleeve (4) is fixedly connected to one end of the lower box (3). An expansion tube (5) is fixedly connected to the end of the sleeve (4). A signal line (6) is inserted into the sleeve (4). Both the upper snap box (2) and the lower snap box (3) are provided with sealing gaskets (7). The upper snap box (2) and the lower snap box (3) are provided with several threaded holes (8). The upper snap box (2) is provided with several bolts (9). The lower snap box (3) is fixedly connected with several insert plates (10). The insert plates (10) are fitted with insert pads (11) on the outside. The upper snap box (2) is provided with several slots (12). The slots (12) are provided with insert pads (13).

2. The waterproof FPC flexible circuit board as described in claim 1, characterized in that: The circuit board (1) is provided with a connecting part at its end, and the upper buckle box (2) and the lower buckle box (3) are matched in shape and size.

3. A waterproof FPC flexible circuit board as described in claim 2, characterized in that: The sleeve (4) has several tubes and is evenly arranged at the end of the lower buckle box (3). The upper buckle box (2) and the lower buckle box (3) both have semi-circular grooves at the position of the sleeve (4).

4. A waterproof FPC flexible circuit board as described in claim 3, characterized in that: The expansion tube (5) adopts a tapered structure, and several threaded holes (8) and bolts (9) are evenly arranged on the upper buckle box (2) and the lower buckle box (3).

5. A waterproof FPC flexible circuit board as described in claim 4, characterized in that: The insert plate (10) adopts a structure that gradually tapers from bottom to top, and several insert plates (10) are evenly arranged on the lower snap box (3).

6. A waterproof FPC flexible circuit board as described in claim 5, characterized in that: The slot (12) adopts a structure that gradually shrinks from bottom to top, and several of the slots (12) are arranged in a corresponding position to the insert plate (10).

7. A waterproof FPC flexible circuit board as described in claim 6, characterized in that: The socket pad (13) is fixedly connected to the inner wall of the slot (12).

Images