Moisture-proof test tool for chip capacitor

Abstract

The utility model relates to a moisture-proof test tool for a chip capacitor. The moisture-proof test tool comprises a substrate, two conductive pole pieces which are oppositely arranged are arranged on the substrate; the conductive pole piece is connected with a plurality of conductive elastic pieces which are arranged at an included angle; the conductive elastic sheets on the conductive pole pieces are oppositely arranged, and the two oppositely arranged conductive elastic sheets form a clamping assembly for clamping a chip capacitor; and the distance between the near ends of the two oppositely arranged conductive elastic sheets is smaller than the distance between the two electrodes of the chip capacitor. According to the utility model, the clamping assembly is formed by the two conductive elastic sheets which are oppositely arranged, the elastic force of the conductive elastic sheets can be utilized to realize the rapid clamping connection of the cuboid chip capacitor, the disassembly is convenient, and the complex process of welding for electric connection in the prior art is avoided; and a plurality of groups of clamping assemblies can be arranged on the conductive pole piece, so that the moisture resistance test of a plurality of chip capacitors can be simultaneously realized, and the test efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of testing fixtures, and in particular to a moisture resistance testing fixture for surface mount capacitors. Background Technology

[0002] Surface mount capacitors are common electronic components, often referred to as multilayer ceramic capacitors (MLCCs), characterized by their miniaturization and high reliability. Surface mount capacitors are formed by stacking ceramic dielectric films with printed electrodes (internal electrodes) in a staggered manner, then sintering them at high temperatures in a single process to form a ceramic chip. Metal layers (external electrodes) are then sealed to both ends of the chip, creating a monolithic structure, hence the name monolithic capacitor. Its overall structure is cuboid. Before production, surface mount capacitors require testing. Testing involves energizing the capacitor, but due to their small size, the conventional method is to solder the external electrodes to a test board. After testing, the capacitor needs to be disassembled, which is time-consuming, labor-intensive, inefficient, and difficult to operate.

[0003] Patent publication number CN213181637U discloses a small test fixture for feedthrough capacitors and surface mount capacitors. Although it can facilitate the electrical connection of surface mount capacitors, the structure is complex and cannot quickly install multiple surface mount capacitors at the same time, and it also has the problem of poor efficiency. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides a moisture resistance testing fixture for surface mount capacitors.

[0005] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0006] A moisture resistance test fixture for surface mount capacitors includes a substrate; two opposing conductive electrode plates are provided on the substrate; several conductive springs arranged at an angle are connected to the conductive electrode plates; the conductive springs on the conductive electrode plates are arranged opposite to each other, and two opposing conductive springs constitute a clamping assembly for clamping the surface mount capacitor; the distance between the proximal ends of the two opposing conductive springs is less than the distance between the two electrodes of the surface mount capacitor.

[0007] Furthermore, the conductive electrode sheet is provided with a first connecting groove for connecting the conductive spring sheet; the conductive spring sheet is provided with a first protrusion that mates with the first connecting groove.

[0008] Furthermore, the conductive electrode sheet is provided with a second connecting groove for connecting the conductive spring sheet; the first connecting groove and the second connecting groove are arranged along the length direction of the conductive spring sheet; the conductive spring sheet is provided with a second protrusion that cooperates with the second connecting groove.

[0009] Furthermore, the second connecting groove extends through the edge of the conductive electrode sheet.

[0010] Furthermore, the width of the portion of the conductive spring extending out of the conductive electrode sheet gradually decreases in a first direction; the first direction is along the length of the conductive spring sheet from the end of the conductive spring sheet closest to the connected conductive electrode sheet to the end of the conductive spring sheet furthest from the connected conductive electrode sheet.

[0011] Furthermore, both the conductive electrode sheet and the conductive spring sheet are made of stainless steel.

[0012] Furthermore, the substrate is a PTFE substrate.

[0013] Furthermore, the two ends of the conductive electrode sheet are fixedly connected to the substrate by screws.

[0014] Furthermore, the conductive electrode is connected to the testing instrument via a wire.

[0015] Furthermore, the included angle α between the conductive spring and the conductive electrode is 20-45°; there are a total of 6 clamping components.

[0016] The beneficial effects of this utility model are as follows: By using two opposing conductive springs to form a clamping assembly, the elasticity of the conductive springs can be used to quickly clamp and connect the cuboid surface-mount capacitors, while facilitating disassembly and eliminating the complex welding process required for electrical connection in existing technologies; multiple clamping assemblies can be arranged on the conductive electrode sheet, enabling simultaneous moisture resistance testing of multiple surface-mount capacitors and improving testing efficiency; the cooperation between the first and second connecting grooves provides better fixation of the conductive springs and facilitates their replacement and disassembly; because the conductive springs are deformed and bent during operation, this deformation and bending forces effective contact between the first protrusion and the first connecting groove, and between the second protrusion and the first connecting groove, ensuring stable electrical connection and reducing the precision requirements for slotting the first and second connecting grooves, thus lowering costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the conductive electrode sheet structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the conductive spring structure of this utility model;

[0021] Explanation of reference numerals in the attached figures:

[0022] 100, substrate; 110, conductive electrode sheet; 111, first connecting groove; 112, second connecting groove; 120, conductive spring sheet; 121, first protrusion; 122, second protrusion; 130, screw; 140, wire; 200, chip capacitor; 210, electrode. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example:

[0027] like Figure 1-3 As shown, the moisture resistance test fixture for surface mount capacitors includes a substrate 100; the substrate 100 is typically made of PTFE substrate 100, which has excellent properties such as high and low temperature resistance, corrosion resistance, and high insulation, making it suitable for various harsh environments and able to meet various working conditions in moisture resistance testing; in one embodiment, the substrate 100 can also be made of insulating material; two opposing conductive electrode plates 110 are provided on the substrate 100; the conductive electrode plates 110 are typically arranged in parallel, and the two ends of the conductive electrode plates 110 are fixedly connected to the substrate 100 by screws 130; the conductive electrode plates 110 are connected to the testing instrument via wires 140; a plurality of conductive springs 120 arranged at an angle are connected to the conductive electrode plates 110; In one embodiment, the included angle α between the conductive spring 120 and the conductive electrode 110 is 20-45°; in another embodiment, the included angle α between the conductive spring 120 and the conductive electrode 110 is 20°; in yet another embodiment, the included angle α between the conductive spring 120 and the conductive electrode 110 is 25°; in yet another embodiment, the included angle α between the conductive spring 120 and the conductive electrode 110 is 30°; in yet another embodiment, the included angle α between the conductive spring 120 and the conductive electrode 110 is 35°; in yet another embodiment, the included angle α between the conductive spring 120 and the conductive electrode 110 is 38°; and in yet another embodiment, the included angle α between the conductive spring 120 and the conductive electrode 110 is 45°.

[0028] The conductive springs 120 on the conductive electrode sheet 110 are arranged opposite each other. Parallel arrangement of the conductive electrode sheets 110 also facilitates the symmetrical arrangement of the two opposing conductive springs 120. The two opposing conductive springs 120 constitute a clamping assembly for holding the surface mount capacitor 200. In one embodiment, a total of six clamping assemblies are provided. The distance between the proximal ends of the two opposing conductive springs 120 is less than the distance between the two electrodes 210 of the surface mount capacitor 200. In one embodiment, the two opposing conductive springs 120... The distance between the proximal ends of the two conductive springs 120 is zero, meaning the ends of the two conductive springs 120 are close together. This allows the conductive springs 120 to deform more when the chip capacitor 200 is applied, ensuring the stability of the connection with the chip capacitor 200. In one embodiment, the distance between the proximal ends of the two opposing conductive springs 120 may not be zero, as long as it is less than the distance between the two electrodes 210 of the chip capacitor 200. The angle between the conductive electrode 110 and the conductive spring 120 facilitates the installation of the chip capacitor 200. Figure 1In the middle, the two conductive springs 120 form a ">" shaped structure. During installation, the chip capacitor 200 can be quickly installed into place by pushing it from left to right. After the test is completed, the chip capacitor 200 can also be pushed from left to right to easily remove it.

[0029] In one embodiment, the conductive electrode sheet 110 is provided with a first connecting groove 111 for connecting the conductive spring sheet 120; the first connecting groove 111 has a certain length in the length direction of the conductive spring sheet 120, thereby enabling effective fixing and limiting of the conductive spring sheet 120. When the conductive spring sheet 120 is deformed by force, it can achieve a stable electrical connection with the first connecting groove 111 without the need for other connections; it can be understood that the conductive spring sheet 120 is inserted into the first connecting groove 111, and the size of the first connecting groove 111 can be slightly larger than the size of the first protrusion 121 on the conductive spring sheet 120;

[0030] In one embodiment, the conductive electrode sheet 110 is provided with a second connecting groove 112 for connecting the conductive spring sheet 120; the first connecting groove 111 and the second connecting groove 112 are arranged along the length direction of the conductive spring sheet 120; the conductive spring sheet 120 is provided with a second protrusion 122 that cooperates with the second connecting groove 112; by adding the second connecting groove 112, the contact area with the conductive spring sheet 120 can be increased, further increasing the reliability of the connection; in one embodiment, the second connecting groove 112 penetrates the edge of the conductive electrode sheet 110, that is, one end of the second connecting groove 112 is open;

[0031] In one embodiment, the width of the portion of the conductive spring 120 extending out of the conductive electrode 110 gradually decreases in a first direction; the width is as follows: Figure 2 The first direction is along the length of the conductive spring 120, from the end of the conductive spring 120 near the connected conductive electrode 110 to the end of the conductive spring 120 away from the connected conductive electrode 110. By setting the width of the conductive spring 120 to gradually decrease, the end of the conductive spring 120 connected to the chip capacitor 200 is more easily deformed, and the amount of deformation is also greater, so that it can better fit onto the electrode 210 of the chip capacitor 200. That is, through the change in width, the part of the conductive spring 120 away from the chip capacitor 200 provides support and elasticity, while the part near the chip capacitor 200 undergoes greater deformation and is completely attached to the electrode 210 of the chip capacitor 200 to achieve electrical connection. In one embodiment, both the conductive electrode 110 and the conductive spring 120 are made of stainless steel.

[0032] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A moisture resistance testing fixture for surface mount capacitors, characterized in that: The device includes a substrate (100); two conductive electrode sheets (110) are disposed opposite to each other on the substrate (100); a plurality of conductive spring sheets (120) arranged at an angle are connected to the conductive electrode sheets (110); the conductive spring sheets (120) on the conductive electrode sheets (110) are disposed opposite to each other, and the two oppositely disposed conductive spring sheets (120) constitute a clamping assembly for clamping a chip capacitor (200); the distance between the proximal ends of the two oppositely disposed conductive spring sheets (120) is less than the distance between the two electrodes (210) of the chip capacitor (200).

2. The moisture resistance testing fixture for surface mount capacitors according to claim 1, characterized in that: The conductive electrode sheet (110) is provided with a first connecting groove (111) for connecting the conductive spring sheet (120); the conductive spring sheet (120) is provided with a first protrusion (121) that cooperates with the first connecting groove (111).

3. The moisture resistance testing fixture for surface mount capacitors according to claim 2, characterized in that: The conductive electrode sheet (110) is provided with a second connecting groove (112) for connecting the conductive spring sheet (120); the first connecting groove (111) and the second connecting groove (112) are arranged along the length direction of the conductive spring sheet (120); the conductive spring sheet (120) is provided with a second protrusion (122) that cooperates with the second connecting groove (112).

4. The moisture resistance testing fixture for surface mount capacitors according to claim 3, characterized in that: The second connecting groove (112) penetrates the edge of the conductive electrode sheet (110).

5. The moisture resistance testing fixture for surface mount capacitors according to claim 1, characterized in that: The width of the portion of the conductive spring (120) extending out of the conductive electrode (110) gradually decreases in a first direction; the first direction is along the length of the conductive spring (120) from the end of the conductive spring (120) close to the connected conductive electrode (110) to the end of the conductive spring (120) away from the connected conductive electrode (110).

6. The moisture resistance testing fixture for surface mount capacitors according to claim 1, characterized in that: Both the conductive electrode sheet (110) and the conductive spring sheet (120) are made of stainless steel.

7. The moisture resistance testing fixture for surface mount capacitors according to claim 1, characterized in that: The substrate (100) is a PTFE substrate.

8. The moisture resistance testing fixture for surface mount capacitors according to claim 1, characterized in that: The two ends of the conductive electrode sheet (110) are fixedly connected to the substrate (100) by screws (130).

9. The moisture resistance testing fixture for surface mount capacitors according to claim 1, characterized in that: The conductive electrode sheet (110) is connected to the testing instrument via a wire (140).

10. The moisture resistance testing fixture for surface mount capacitors according to claim 1, characterized in that: The included angle α between the conductive spring sheet (120) and the conductive electrode sheet (110) is 20-45°; there are a total of 6 clamping components.

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