Piezoresistor structure
By designing an electrode pin structure with upper oblique strip part, lower oblique strip part and vertical strip part, the problem of inaccurate positioning during the installation of the existing varistor is solved, and the rapid, accurate and stable installation of the varistor is achieved. , reduces the defective rate and production cost of circuit board products.
Patent Information
- Application Number
- CN202420065113.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2023-12-28
- Filing Date
- 2024-01-11
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-01-11
AI Technical Summary
During the installation process, existing varistors are difficult to control the electrode pins to pass through the PCB board, resulting in inaccurate welding positioning and increasing the defective rate of circuit board products.
An electrode pin structure including an upper oblique strip, a lower oblique strip and a vertical strip are designed so that the insulating layer is completely coated on the varistor substrate and the upper oblique strip of the electrode pin, and passes through the lower oblique strip of the The strips are accurately positioned and inserted on the PCB board to avoid the insulating layer affecting welding positioning.
The stable connection between the electrode pin and the varistor substrate is achieved, which improves installation convenience and accuracy, reduces the defective rate of circuit board products, and reduces production costs.
Smart Images
Figure CN222145916U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of resistors, in particular to a varistor structure. Background Art
[0002] like Figure 1 and Figure 2 As shown, most existing varistors are composed of a varistor substrate 100, an insulating layer 200, and two electrode pins 300. One end of the two electrode pins 300 is connected to the front and rear surfaces of the varistor substrate 100, respectively, and the other ends of the two electrode pins 300 are arranged vertically downward. The insulating layer 200 is coated on the varistor substrate 100 and one end of the two electrode pins 300. Among them, the insulating layer 200 is now mostly set by dip coating. In order to make the insulating layer 200 effectively protect the varistor substrate 100, when the insulating layer 200 is dip-coated, the varistor is immersed in the molten insulating material as much as possible, which will also cause the upper end of the other end of the two electrode pins 300 to be coated with a longer insulating layer 200.
[0003] like Figure 3 As shown, when the varistor is installed on the PCB board 400, the lower ends of the two electrode pins 300 are inserted into the PCB board 400. Since the lower ends of the two electrode pins 300 are vertical, it is difficult to control the amount of the electrode pins 300 passing through the PCB board 400 when the electrode pins 300 are inserted, and the electrode pins 300 are often inserted too much. In order to facilitate the insertion of the electrode pins 300, the holes on the PCB board 400 for the electrode pins 300 to be inserted are generally made larger; in addition, the thickness of the insulating layer 200 coated on the upper end of the other end of the electrode pins 300 is generally thin. Therefore, during the insertion of the electrode pins 300, the insulating layer 200 on the upper end of the other end of the electrode pins 300 often passes through the PCB board 400. In this way, when the electrode pins 300 are soldered and positioned on the pads 500 on the PCB board 400, the insulating layer 200 will prevent the solder 600 from contacting the electrode pins 300, which is likely to cause a high number of defective products in the related circuit board structure.
[0004] Therefore, it is necessary to redesign the structure of the varistor. Utility Model Content
[0005] The purpose of the utility model is to solve the above-mentioned problems and shortcomings and to provide a varistor structure which is not only convenient for quick, accurate and stable installation, but also can avoid the influence of the insulating layer on the soldering positioning of the pins, thereby greatly reducing the defective rate of related circuit board products. The utility model has the advantages of simple structure, high reliability, easy installation and strong applicability.
[0006] The technical solution of the utility model is implemented as follows: a varistor structure, including a varistor substrate and an insulating layer, which is characterized in that it also includes two electrode pins, the electrode pins include an upper oblique strip portion, a lower oblique strip portion, and a vertical strip portion, the upper and lower ends of the lower oblique strip portion are respectively connected to the lower end of the upper oblique strip portion and the upper end of the vertical strip portion; the upper ends of the upper oblique strip portions of the two electrode pins are respectively arranged on the front and rear surfaces of the varistor substrate, and the lower ends of the lower oblique strip portions on the front and rear electrode pins are placed below the varistor substrate, and the insulating layer completely covers the varistor substrate and the upper oblique strip portions of the two electrode pins.
[0007] Preferably, the lower oblique strips on the front and rear electrode pins are inclined toward the front and rear, respectively.
[0008] Preferably, the minimum angle A between the lower inclined strip portion and the horizontal plane is 45 to 50 degrees.
[0009] Preferably, the vertical stripes on the two electrode pins are arranged side by side.
[0010] Preferably, the upper oblique strip portion is arranged to be inclined to the left or to the right.
[0011] Preferably, a short vertical bar is provided between the lower end of the upper oblique bar portion and the upper end of the lower oblique bar portion.
[0012] Preferably, the short vertical bar and the upper oblique bar portion are connected in a circular arc transition, and the short vertical bar and the lower oblique bar portion are connected in a circular arc transition.
[0013] Preferably, the insulating layer also completely covers the connection between the short vertical bars and the upper oblique bar portion, the short vertical bars, and the arc transition connection between the short vertical bars and the lower oblique bar portion.
[0014] Preferably, the vertical bar portion and the lower oblique bar portion are connected in an arc transition.
[0015] The beneficial effects of the utility model are as follows: In the varistor structure, the use of the upper oblique strip portion can ensure that there is sufficient connection between the electrode pin and the varistor substrate, thereby facilitating the formation of a very stable connection between the electrode pin and the varistor substrate. The vertical strip portion can facilitate the insertion and positioning of the electrode pin, thereby facilitating the convenience and accuracy of the installation and positioning of the varistor structure. By connecting the upper end of the upper oblique strip portion with the varistor substrate and completely covering the upper oblique strip portion of the varistor substrate and the two electrode pins with the insulating layer, the insulating layer can better play the role of insulating protection, thereby facilitating the guarantee of the varistor structure having a very high reliability. The use of the lower oblique strip portion can achieve the purpose of accurately positioning the insertion amount when the vertical strip portion is inserted on the PCB board. Since there is no insulating layer on the lower oblique strip and the vertical strip, the insulating layer can be prevented from entering the PCB board, thereby preventing the insulating layer from affecting the welding positioning of the electrode pin, and thus ensuring that the electrode pin can be accurately and stably welded with the pad on the PCB board, and the varistor structure can be conveniently installed quickly, accurately and stably, which can greatly reduce the defective rate of related circuit board products, and the installation positioning of the varistor structure can be very convenient and accurate. By placing the lower ends of the lower oblique strips on the front and rear electrode pins below the varistor substrate, the varistor structure can be prevented from tilting forward and backward after the vertical strip is inserted into the PCB board, which can facilitate the purpose of accurately installing the varistor structure. And in this way, the occupation of the PCB board space by the varistor structure can be reduced, so that the varistor structure can be installed on a small PCB board. The reliability and applicability of the varistor structure are very strong. At the same time, the overall structure of the varistor structure is relatively simple, so it is also relatively convenient to manufacture, which is conducive to reducing the production cost of the enterprise and improving the market competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of an existing varistor in the main viewing direction.
[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of an existing varistor.
[0018] Figure 3 This is a structural diagram of the existing varistor installation status.
[0019] Figure 4 It is a three-dimensional structural schematic diagram of the varistor structure in the utility model.
[0020] Figure 5 It is a schematic cross-sectional view of the varistor structure in the utility model.
[0021] Figure 6It is a three-dimensional structural schematic diagram of the assembly state of the varistor substrate and two electrode pins in the utility model.
[0022] FIG. 7 is a schematic structural diagram of the varistor substrate and two electrode pins in the utility model when assembled, viewed from the left.
[0023] Figure 8 It is a schematic diagram of the three-dimensional structure of the electrode pin in the utility model.
[0024] Fig. 9 It is a schematic diagram of the structure of the electrode pin in the utility model when viewed from the left.
[0025] Fig.10 It is a three-dimensional structural schematic diagram of the utility model in use state.
[0026] Fig.11 It is a structural schematic diagram of the main viewing direction of the utility model in use state. Implementation
[0027] like Figures 4 to 7 As shown, the varistor structure described in the utility model includes a varistor substrate 1, an insulating layer 2, and in order to achieve the invention purpose of the utility model, also includes two electrode pins 3,
[0028] like Figure 8 and Fig. 9 As shown, the electrode pin 3 includes an upper oblique strip portion 31, a lower oblique strip portion 32, and a vertical strip portion 33, and the upper and lower ends of the lower oblique strip portion 32 are connected to the lower end of the upper oblique strip portion 31 and the upper end of the vertical strip portion 33 respectively;
[0029] like Figures 4 to 9 As shown, the upper ends of the upper oblique strips 31 of the two electrode pins 3 are respectively arranged on the front and rear surfaces of the varistor substrate 1, and the lower ends of the lower oblique strips 32 on the front and rear electrode pins 3 are placed below the varistor substrate 1, and the insulating layer 2 is completely covered on the varistor substrate 1 and the upper oblique strips 31 of the two electrode pins 3.
[0030] In the varistor structure, the use of the upper inclined strip portion 31 can ensure that there is sufficient connection between the electrode pin 3 and the varistor substrate 1, thereby facilitating the formation of a very stable connection between the electrode pin 3 and the varistor substrate 1.
[0031] The vertical strips 33 can facilitate the insertion and positioning of the electrode pins 3, thereby improving the convenience and accuracy of the installation and positioning of the varistor structure.
[0032] By connecting the upper end of the upper inclined strip 31 to the varistor substrate 1 and completely covering the upper inclined strip 31 of the varistor substrate 1 and the two electrode pins 3 with the insulating layer 2, the insulating layer 2 can better play the role of insulating protection, thereby ensuring that the varistor structure has a very high reliability.
[0033] The lower oblique strip 32 can be used to accurately locate the insertion amount when the vertical strip 33 is inserted into the PCB board. Since there is no insulating layer 2 on the lower oblique strip 32 and the vertical strip 33, it can prevent the insulating layer 2 from entering the PCB board, thereby preventing the insulating layer 2 from affecting the welding positioning of the electrode pin 3, and thus can help ensure that the electrode pin 3 can be accurately and stably welded to the pad on the PCB board. The varistor structure can be easily installed quickly, accurately and stably, which can help greatly reduce the defective rate of related circuit board products. The installation positioning of the varistor structure can be very convenient and accurate.
[0034] By placing the lower ends of the lower oblique strips 32 on the front and rear electrode pins 3 below the varistor substrate 1, the varistor structure can be prevented from tipping forward and backward after the vertical strips 33 are inserted into the PCB board, which can facilitate the purpose of accurately installing the varistor structure. In addition, the amount of space occupied by the PCB board by the varistor structure can be reduced, so that the varistor structure can be installed on a small PCB board. The reliability and applicability of the varistor structure are very strong.
[0035] At the same time, the overall structure of the varistor structure is relatively simple, so it is also relatively convenient to manufacture.
[0036] When the insulating layer 2 is provided by dip coating, the connection between the lower oblique strip portion 32 and the upper oblique strip portion 31 can be used to mark the dip coating position, thereby facilitating accurate control of the dip coating of the insulating layer 2 and facilitating the production of high-quality varistor structures.
[0037] like Figures 7 to 9 As shown, the lower inclined strips 32 on the front and rear electrode pins 3 are inclined toward the front and rear, respectively. In this way, when two electrode pins 3 are produced on one metal strip, it is convenient for the mold to punch out two lower inclined strips 32 at one time, which not only helps to reduce the manufacturing difficulty of the mold, but also helps to improve the production efficiency of the electrode pins 3, and this can ensure that the varistor structure can still have a very good anti-front and rear tilting effect, which helps to further improve the applicability of the varistor structure.
[0038] When producing electrode pins 3, generally both ends of a metal strip are stamped into electrode pins by a die at the same time, and then the middle of the metal strip is cut to obtain two electrode pins 3. Therefore, the above structure can not only reduce the difficulty of manufacturing the die, but also improve the production efficiency of the electrode pins 3.
[0039] like Fig. 9 As shown, the minimum angle A between the lower inclined strip portion 32 and the horizontal plane is 45 to 50 degrees. This not only facilitates the molding process, but also enables the lower inclined strip portion 32 to have a very reliable limiting effect, thereby further improving the applicability of the varistor structure.
[0040] like Fig. 9 As shown, in the actual manufacturing process, the angle A can be selected from 45 degrees, 46 degrees, 47 degrees, 48 degrees, 49 degrees and 50 degrees, which can well meet the needs of actual manufacturing.
[0041] like Figures 4 to 8 As shown, the vertical strips 33 on the two electrode pins 3 are arranged side by side. This can further reduce the space occupied by the varistor structure on the PCB board, so that the varistor structure can be installed on a smaller PCB board, which helps to further improve the application range of the varistor structure.
[0042] like Figures 5 to 8 As shown, the upper inclined strip portion 31 is arranged to tilt to the left or to the right, which can facilitate accurate connection between the upper inclined strip portion 31 and the surface of the varistor substrate 1, thereby improving the assembly quality.
[0043] like Figure 8 and Fig. 9 As shown, a short vertical bar 34 is provided between the lower end of the upper oblique bar portion 31 and the upper end of the lower oblique bar portion 32. The use of the short vertical bar 34 can facilitate the convenient and accurate bending and forming of the upper oblique bar portion 31 and the lower oblique bar portion 32, thereby facilitating the rapid production of high-quality electrode pins 3, thereby helping to improve the quality of the varistor structure. The use of the short vertical bar 34 can well control the use of raw materials and reduce the height space occupied by the varistor structure, thereby facilitating the control of manufacturing costs and ensuring that the varistor structure has a wide range of applications.
[0044] like Figure 8 and Fig. 9 As shown, the short vertical bar 34 is connected to the upper oblique bar portion 31 in an arc transition, and the short vertical bar 34 is connected to the lower oblique bar portion 32 in an arc transition. This is not only conducive to the processing of the electrode pin 3, but also conducive to ensuring that the electrode pin 3 has high structural strength and reliability, thereby further improving the reliability of the varistor structure.
[0045] like Figure 4 , Figure 5 and Figure 8 As shown, the insulating layer 2 also completely covers the connection between the short vertical bar 34 and the upper oblique bar portion 31, the short vertical bar 34, and the arc transition connection between the short vertical bar 34 and the lower oblique bar portion 32. In this way, the insulating layer 2 can better play the role of insulation protection, thereby helping to further improve the reliability and applicability of the varistor structure.
[0046] like Figure 8 and Fig. 9 As shown, the vertical bar portion 33 and the lower oblique bar portion 32 are connected in a circular arc transition. This is not only conducive to the processing of the electrode pin 3, but also conducive to ensuring that the electrode pin 3 has high structural strength and reliability, thereby further improving the reliability of the varistor structure.
[0047] like Fig.10 and Fig.11 As shown, when the varistor structure is installed on the PCB board 10, the two vertical strips 33 are inserted into the PCB board 10. The arc transition connection where the vertical strips 33 and the lower oblique strips 32 are connected can accurately locate the insertion amount of the electrode pins 3, so that the varistor structure can be quickly and accurately positioned on the PCB board 10. At this time, the insulating layer 2 is located above the PCB board 10, and the insulating layer 2 does not contact the PCB board 10. In this way, the varistor structure can not only facilitate fast, accurate and stable installation, but also prevent the insulating layer 2 from affecting the soldering positioning of the pins, so that the defective rate of related circuit board products can be greatly reduced.
[0048] Since the components of ceramic capacitors and varistor structures are similar in shape, when actually manufacturing ceramic capacitors, the ceramic capacitors can be manufactured using the above-mentioned structure, which can also enable the ceramic capacitors to have the above-mentioned technical effects, thereby helping to improve the applicability of the ceramic capacitors.
Claims
1. A varistor structure, comprising a varistor substrate (1) and an insulating layer (2), characterized in that: It also includes two electrode pins (3), The electrode pin (3) comprises an upper oblique strip portion (31), a lower oblique strip portion (32), and a vertical strip portion (33), wherein the upper and lower ends of the lower oblique strip portion (32) are respectively connected to the lower end of the upper oblique strip portion (31) and the upper end of the vertical strip portion (33); The upper ends of the upper oblique strips (31) of the two electrode pins (3) are respectively arranged on the front and rear surfaces of the varistor substrate (1), and the lower ends of the lower oblique strips (32) on the front and rear electrode pins (3) are both placed below the varistor substrate (1), and the insulating layer (2) completely covers the varistor substrate (1) and the upper oblique strips (31) of the two electrode pins (3).
2. The varistor structure according to claim 1, characterized in that: The lower inclined strips (32) on the front and rear electrode pins (3) are inclined toward the front and rear, respectively.
3. The varistor structure according to claim 1 or 2, characterized in that: The minimum angle A between the lower inclined strip portion (32) and the horizontal plane is 45 to 50 degrees.
4. The varistor structure according to claim 1, characterized in that: The vertical stripes (33) on the two electrode pins (3) are arranged side by side in left and right directions.
5. The varistor structure according to claim 1, characterized in that: The upper inclined strip portion (31) is arranged to be inclined to the left or to the right.
6. The varistor structure according to claim 1, characterized in that: A short vertical bar (34) is provided between the lower end of the upper inclined bar portion (31) and the upper end of the lower inclined bar portion (32).
7. The varistor structure according to claim 6, characterized in that: The short vertical bar (34) and the upper oblique bar portion (31) are connected in a circular arc transition, and the short vertical bar (34) and the lower oblique bar portion (32) are connected in a circular arc transition.
8. The varistor structure according to claim 7, characterized in that: The insulating layer (2) also completely covers the connection between the short vertical bar (34) and the upper oblique bar portion (31), the short vertical bar (34), and the arc transition connection between the short vertical bar (34) and the lower oblique bar portion (32).
9. The varistor structure according to claim 1, characterized in that: The vertical bar portion (33) and the lower oblique bar portion (32) are connected in a circular arc transition.