Flexible printed circuit (FPC) resistor replacement structure

Abstract

The utility model relates to the field of notebook computer keyboards, in particular to an FPC (Flexible Printed Circuit) resistor replacement structure, which comprises a resistance production part, the resistance production part comprises a resistance control line and a connecting end connected with the resistance control line, the connecting end is connected with a line of an external circuit board, and the resistance control line controls the size of a resistor through the winding length. The use of original resistor parts and welding process is canceled, a resistor with a specific resistance value is replaced by the resistance wire on the printed circuit, the resistance value of the original resistor parts is controlled by adjusting the winding length, the problem that the resistance value of a conductor needs to be controlled by the resistor parts in the prior art is solved, the welding process step is simplified, and the production efficiency is improved. The production process is optimized, the production cost is reduced, meanwhile, the quality guarantee of products is improved, and the manufacturability and reliability of the products are effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of notebook computer keyboards, in particular to an FPC resistor replacement structure. Background Art

[0002] Nowadays, many laptop keyboards on the market have lighting functions. Mini LED lights are installed on the back of the keyboards of such laptops. The connection of the LED lights requires a resistance value. The existing method is to control the resistance of the conductor by adding resistance between the conductors using the SMT process. This method requires the use of resistors. Secondly, the resistor components need to be soldered to the circuit board. Welding has a large quality risk, and the welding equipment is usually more complicated and requires regular maintenance and overhaul, with high maintenance costs. Therefore, it is necessary to develop an FPC resistor replacement structure to eliminate the use of the original resistor components and welding process, reduce production costs and optimize the production process. Utility Model Content

[0003] In view of the above-mentioned existing method for controlling the resistance of the conductor, it is necessary to weld the resistance components to the circuit board, which leads to high quality risks, high welding equipment maintenance costs, high production costs and other problems. The technical solution adopted by the utility model to solve the technical problems is:

[0004] A FPC resistor replacement structure includes a resistor generating part, wherein the resistor generating part includes a resistor control line and a connection end connected to the resistor control line, wherein the connection end is connected to a line of an external circuit board, and the resistor control line controls the size of the resistor by the winding length.

[0005] A FPC resistor replacement structure, the resistor control line includes a first connection part and a second connection part, the first connection part and the second connection part are each provided with a plurality, the first connection part and the second connection part are used to generate and control resistance, and the second connection part is connected between two adjacent first connection parts, or connected between the first connection part and the connection end.

[0006] An FPC resistor replacement structure, wherein the cross-section of the first connecting portion in the extending direction is a rectangle.

[0007] An FPC resistor replacement structure, wherein the cross section of the second connecting portion in the extending direction is semicircular or concave.

[0008] An FPC resistor replacement structure, wherein a cross-sectional width S4 of the first connecting portion in an extending direction is the same as a cross-sectional width S3 of the second connecting portion in an extending direction.

[0009] An FPC resistor replacement structure, wherein a cross-sectional width S4 in the extending direction of the first connection portion and a cross-sectional width S3 in the extending direction of the second connection portion are smaller than a width S2 of the connection end.

[0010] A FPC resistor replacement structure, wherein two second connection parts are respectively connected to two ends of the first connection part, and two first connection parts are respectively connected to two ends of the second connection part, so that the first connection part and the second connection part are alternately connected.

[0011] An FPC resistor replacement structure, wherein a plurality of the first connecting portions are parallel to each other.

[0012] An FPC resistor replacement structure, wherein the distance between two adjacent first connecting portions 111 is equal.

[0013] A FPC resistor replacement structure, wherein the cross-section of the resistor generating portion in the extending direction is in the shape of an elongated strip, the resistor control line is arranged in an undulating and zigzag shape, and the winding length of the resistor control line ranges from 1 mm to 300 mm.

[0014] The beneficial effects of the utility model are as follows:

[0015] The utility model eliminates the use of original resistance components and welding process, replaces the resistor with a specific resistance value by a resistance wire on a printed circuit, and changes the original resistance component to control the resistance value by adjusting the winding length, thereby solving the problem that the existing method requires the resistance component to control the conductor resistance value, simplifies the welding process steps, optimizes the production process and reduces the production cost, while improving the quality assurance of the product and effectively improving the manufacturability and reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of an FPC resistor replacement structure. DETAILED DESCRIPTION

[0017] The implementation modes of the present utility model are described in detail below in conjunction with the accompanying drawings.

[0018] See also Figure 1, a FPC resistor replacement structure, including a resistor generating part 1, the resistor generating part 1 including a resistance control line 11, a connection end 12 connected to the resistance control line 11, the connection end 12 connected to the circuit of an external circuit board, and the resistance control line 11 controls the size of the resistance by the winding length. The design of the resistance generating part 1 creates a component with a predetermined resistance value inside the circuit board to replace the traditional resistance parts. Since the resistance of the conductor is proportional to its length and inversely proportional to its cross-sectional area, the resistance control line 11 in the resistance generating part 1 can change the size of the resistance value by changing the winding length, and the connection end 12 is used to connect the resistance control line 11 with other circuits or components of the external circuit board. The connection end 12 can be any form of contact point or interface. Such a design can reduce the number of components, eliminate the need for additional resistance parts, simplify the structure of the circuit board, and secondly reduce costs, reduce solder joints, reduce potential failure points, and optimize space utilization. The resistance control line 11 can be tightly arranged inside the circuit board to achieve a compact design.

[0019] For further information, see Figure 1 , a FPC resistor replacement structure, the resistance control line 11 includes a first connection part 111 and a second connection part 112, the first connection part 111 and the second connection part 112 are each provided with a plurality, the first connection part 111 and the second connection part 112 are used to generate and control resistance, the second connection part 112 is connected between two adjacent first connection parts 111, or connected between the first connection part 111 and the connection end 12. The first connection part 111 is the basis of the resistance control line 11. A plurality of the first connection parts 111 can be provided. By increasing the number of the first connection parts 111, the resistance value can be increased, thereby achieving a larger resistance control range. There are two second connection parts 112 connected between the connection end 12 and the first connection part 111. The second connection part 112 is responsible for connecting the first connection part 111 with the connection end 12, and also participates in the generation of resistance. Similar to the first connection part 111, a plurality of the second connection parts 112 can also be provided. By connecting a plurality of the first connection parts 111 by themselves, the resistance value is increased. At the same time, the length of the second connection part 112 itself will also increase the resistance value of the resistance control line 11.

[0020] For further information, see Figure 1, a FPC resistor replacement structure, the cross section of the first connection part 111 in the extension direction is rectangular. The rectangular design of the cross section of the first connection part 111 in the extension direction can finely adjust the resistance value by adjusting its length and width. A shorter or wider first connection part 111 will reduce the resistance accordingly, while a longer or narrower first connection part 111 will increase the resistance value. Therefore, the first connection part 111 can be flexibly adjusted according to the specific needs of the circuit to achieve the required resistance accuracy, and the rectangular cross section can more effectively disperse heat, which helps to improve the thermal stability of the resistor component. The first connection part 111 can better resist performance fluctuations caused by temperature changes. In addition, compared with a circular or other shape, the rectangular cross section provides a larger contact area in the plane direction, thereby improving the bonding strength between the first connection part 111 and the substrate, reducing the risk of breakage caused by bending or vibration, and effectively enhancing the overall mechanical stability of the circuit board.

[0021] For further information, see Figure 1 , an FPC resistor replacement structure, the cross section of the second connection part 112 in the extension direction is semicircular or concave. Such a design can be more effectively laid out in a limited space, so that more first connection parts are arranged in a limited space, and the maximum settable resistance value of the resistance control line 111 is effectively increased.

[0022] For further information, see Figure 1 , a FPC resistor replacement structure, the cross-sectional width S4 of the first connection part 111 in the extension direction is the same as the cross-sectional width S3 of the second connection part 112 in the extension direction. When the cross-sectional width S4 of the first connection part 111 in the extension direction is the same as the cross-sectional width S3 of the second connection part 112 in the extension direction, it can ensure that the resistance characteristics of the resistance control line 11 in different parts are consistent, which helps to achieve a more uniform and predictable resistance distribution, simplifies circuit design and performance prediction, ensures the consistency of resistance control, and the same width design helps to optimize the spatial layout on the circuit board, so that the positions of various components can be arranged more freely without worrying about the layout difficulties caused by width differences, effectively improving space efficiency and layout flexibility. In addition, during the manufacturing process, the same width of the connection means that uniform process parameters can be used for etching, deposition or other manufacturing steps, simplifying the production process and effectively reducing the difficulty and cost of manufacturing.

[0023] For further information, see Figure 1, an FPC resistor replacement structure, the cross-sectional width S4 of the first connection part 111 in the extension direction and the cross-sectional width S3 of the second connection part 112 in the extension direction are smaller than the width S2 of the connection end 12. The first connection part 111 and the second connection part 112 are key parts of resistance control, and their smaller widths help to achieve higher-precision resistance control. In circuit design, the resistance value is inversely proportional to the width of the conductor. The smaller the width, the greater the resistance value. By adjusting the cross-sectional width S4 of the first connection part 111 in the extension direction and the cross-sectional width S3 of the second connection part 112 in the extension direction, the resistance characteristics of the entire circuit can be accurately controlled, effectively improving the refinement of resistance control. In comparison, the width S2 of the connection end 12 is larger, which can provide a more stable electrical connection, reduce signal attenuation and noise interference, and effectively improve signal integrity and the overall reliability of the circuit.

[0024] For further information, see Figure 1 , an FPC resistor replacement structure, two second connection parts 112 are respectively connected to the two ends of the first connection part 111, and two first connection parts 111 are respectively connected to the two ends of the second connection part 112, so that the first connection part 111 and the second connection part 112 are alternately connected. The first connection part 111 and the second connection part 112 are alternately connected so that the resistance control line 11 can be arranged in a zigzag shape. With such a design, more first connection parts 111 and second connection parts 112 can be arranged in a limited space of the resistance control line 11, so that the resistance adjustment range of the resistance control line 11 is increased, the space utilization rate and layout optimization are effectively improved, and the design of the resistance control line 11 is more compact, while maintaining the performance and stability of the circuit. Moreover, since the width of the first connection part 111 is the same as that of the second connection part 112, the resistance formed during the alternate connection is more uniform, and the formation of hot spots is reduced, thereby improving the thermal stability of the circuit and preventing performance degradation or component damage caused by local overheating.

[0025] For further information, see Figure 1, a FPC resistor replacement structure, multiple first connection parts 111 are parallel to each other, and the winding width S1 of the resistance control line 11 is greater than or equal to the width S2 of the connection end. Multiple parallel first connection parts 111 participate in resistance control as a whole. By adjusting the number of the first connection parts 111 and the second connection parts 112, the resistance characteristics of the resistance control line 11 can be finely adjusted. The characteristics of parallel connection make the resistance control more precise and controllable. Furthermore, the parallel first connection parts 111 can distribute the current more evenly, reduce the risk of local overheating, effectively improve the thermal stability of the circuit, and make more effective use of the space of the circuit board, effectively improve the reliability and safety of the structure, the winding width S1 of the resistance control line 11 is greater than or equal to the width S2 of the connection end, and further, the wider winding width S1 can reduce the difficulty of manufacturing and increase the winding length, so that the resistance adjustment range of the resistance production part 1 is increased.

[0026] For further information, see Figure 1 , an FPC resistor replacement structure, the distance between two adjacent first connection parts 111 is equal. With such a design, the resistance control line 11 can obtain uniform resistance characteristics, and the equal distance helps to ensure the uniformity of current distribution in the circuit, thereby achieving more stable resistance characteristics. Secondly, it can simplify the design and manufacturing process of the circuit, which is conducive to automated production and improves production efficiency. At the same time, the uniformly distributed first connection parts 111 help to disperse heat and reduce the risk of local overheating, thereby improving the thermal stability of the circuit.

[0027] For further information, see Figure 1 , a FPC resistor replacement structure, the cross section of the resistance generating part 1 in the extension direction is a long strip, the resistance control line 11 is arranged in an undulating and tortuous shape, and the winding length of the resistance control line 11 ranges from 1mm to 300mm. The design of the cross section of the resistance generating part 1 in the extension direction is a long strip, which can more effectively utilize the limited space on the circuit board, the resistance control line 11 is in an undulating and tortuous shape, and the specific shape can be a wave shape, a bow shape, a broken line shape, etc., and the adoption of such a design can increase the effective length of the resistance control line 11, thereby increasing the resistance value, while maintaining the compactness of the circuit, further, the winding length of the resistance control line 11 ranges from 1mm to 300mm, providing a large resistance value adjustment range, so that the designer can accurately adjust the resistance value of the resistance control line 11 according to specific application requirements to meet the needs of different circuit performance, effectively improving the practicality of the resistance generating part 1. The resistance control line 11 is in an undulating and tortuous shape, and the specific shape is a wave shape. The adoption of such a design can increase the effective length of the resistance control line 11, thereby increasing the resistance value, while maintaining the compactness of the circuit.

[0028] Working principle:

[0029] By using the principle that the resistance of a conductor is proportional to its length and inversely proportional to its cross-sectional area, the designer can change the resistance value by changing the winding length of the resistance control line 11 to meet different circuit performance requirements.

[0030] Example 1

[0031] See also Figure 1 , an FPC resistor replacement structure, the resistance control line 11 includes a first connection part 111 and a second connection part 112, the first connection part 111 and the second connection part 112 are provided with a plurality, the first connection part 111 and the second connection part 112 are used to generate and control resistance, and the second connection part 112 is connected between two adjacent first connection parts 111, or connected between the first connection part 111 and the connection end 12. The connection end 12 is connected to the circuit of an external flexible circuit board.

[0032] For further information, see Figure 1 , a FPC resistor replacement structure, the resistance control line 11 includes a first connection part 111 and a second connection part 112, the first connection part 111 and the second connection part 112 are each provided with a plurality, the first connection part 111 and the second connection part 112 are used to generate and control resistance, the second connection part 112 is connected between two adjacent first connection parts 111, or connected between the first connection part 111 and the connection end 12.

[0033] For further information, see Figure 1 , an FPC resistor replacement structure, wherein the cross-section of the first connecting portion 111 in the extending direction is a rectangle.

[0034] For further information, see Figure 1 , an FPC resistor replacement structure, wherein the cross-section of the second connecting portion 112 in the extending direction is semicircular.

[0035] For further information, see Figure 1 , an FPC resistor replacement structure, the cross-sectional width S4 of the first connecting portion 111 in the extending direction is the same as the cross-sectional width S3 of the second connecting portion 112 in the extending direction.

[0036] For further information, see Figure 1 , an FPC resistor replacement structure, wherein a cross-sectional width S4 of the first connection portion 111 in the extending direction and a cross-sectional width S3 of the second connection portion 112 in the extending direction are smaller than a width S2 of the connection end 12 .

[0037] For further information, see Figure 1 , an FPC resistor replacement structure, the two second connection parts 112 are respectively connected to the two ends of the first connection part 111, and the two first connection parts 111 are respectively connected to the two ends of the second connection part 112, so that the first connection part 111 and the second connection part 112 are alternately connected.

[0038] For further information, see Figure 1 , an FPC resistor replacement structure, wherein a plurality of the first connecting portions 111 are parallel to each other.

[0039] For further information, see Figure 1 , an FPC resistor replacement structure, wherein the distance between two adjacent first connecting parts 111 is equal.

[0040] For further information, see Figure 1 , a FPC resistor replacement structure, the cross-section of the resistor portion 1 in the extension direction is a long strip, the resistor control line 11 is arranged in an undulating and tortuous shape, and the specific shape is a wave shape, and the winding length of the resistor control line 11 is 1mm.

[0041] Example 2

[0042] Different from the first embodiment, the cross section of the second connection portion 112 in the extension direction is concave-shaped, the winding length of the resistance control line 11 is 300 mm, and the resistance control line 11 is undulating and tortuous, specifically, in the shape of a bow.

[0043] The above examples are only used to further illustrate the technical content of the utility model, so that readers can understand it more easily, but it does not mean that the implementation methods of the utility model are limited to this. Any technical extension or re-creation made based on the utility model is protected by the utility model. The protection scope of the utility model shall be based on the claims.

Claims

1. An FPC resistor replacement structure, comprising a resistor generating portion (1), characterized in that: The resistance generating part (1) comprises a resistance control line (11) and a connection end (12) connected to the resistance control line (11), wherein the connection end (12) is connected to a circuit of an external circuit board, and the resistance control line (11) controls the size of the resistance by means of a winding length.

2. The FPC resistor replacement structure according to claim 1, characterized in that: The resistance control line (11) comprises a first connection part (111) and a second connection part (112), wherein a plurality of the first connection parts (111) and the second connection parts (112) are provided, wherein the first connection parts (111) and the second connection parts (112) are used to generate and control resistance, and the second connection part (112) is connected between two adjacent first connection parts (111), or is connected between the first connection part (111) and the connection end (12).

3. The FPC resistor replacement structure according to claim 2, characterized in that: The cross-section of the first connecting portion (111) in the extending direction is a rectangle.

4. The FPC resistor replacement structure according to claim 2, characterized in that: The cross section of the second connecting portion (112) in the extending direction is in the shape of a semicircle or a concave letter.

5. The FPC resistor replacement structure according to claim 2, characterized in that: The cross-sectional width S4 of the first connection portion (111) in the extending direction is the same as the cross-sectional width S3 of the second connection portion (112) in the extending direction.

6. The FPC resistor replacement structure according to claim 2, characterized in that: The cross-sectional width S4 of the first connection portion (111) in the extending direction and the cross-sectional width S3 of the second connection portion (112) in the extending direction are smaller than the width S2 of the connection end (12).

7. The FPC resistor replacement structure according to claim 2, characterized in that: The two second connection parts (112) are respectively connected to the two ends of the first connection part (111), and the two first connection parts (111) are respectively connected to the two ends of the second connection part (112), so that the first connection parts (111) and the second connection parts (112) are alternately connected.

8. The FPC resistor replacement structure according to claim 2, characterized in that: The plurality of first connecting portions (111) are parallel to each other.

9. The FPC resistor replacement structure according to claim 2, characterized in that: The distance between two adjacent first connecting portions (111) is equal.

10. The FPC resistor replacement structure according to claim 1, characterized in that: The cross-section of the resistance generating portion (1) in the extension direction is in the shape of a long strip, the resistance control line (11) is arranged in an undulating and zigzag shape, and the winding length of the resistance control line (11) ranges from 1 mm to 300 mm.

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