A packaging structure for a small-sized varistor

Abstract

The utility model relates to a kind of packaging structure for small-sized piezoresistor, including bottom box and cover plate, the cover plate is rotatably connected in the side of the bottom box, and another side of the cover plate is detachably connected with the bottom box;Multiple and the placing groove for placing piezoresistor are set in the inside of the bottom box;The piezoresistor includes two pins and ceramic core body.This packaging structure for small-sized piezoresistor, pin is fixed by limiting groove, avoid the bending caused by disordered stacking in traditional bagging;Circular groove and elastic piece clamp ceramic core body, cooperate the up and down compression of lower pressing block, limit piezoresistor all-around displacement, reduce the damage risk of vibration impact to ceramic core body;At the same time, the closure protection of bottom box and cover plate prevents dust, moisture pollution and pin puncture packaging, compared with traditional bagging, the damage rate of piezoresistor is greatly reduced, and product quality is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of varistor technology, specifically a packaging structure for small varistors. Background Technology

[0002] In the field of electronic components, miniature varistors are widely used in home appliances, communications, automotive electronics, and other fields due to their advantages of fast response speed, large current capacity, and small size. They are used to suppress surge voltages and ensure stable equipment operation. As electronic devices develop towards miniaturization and integration, the requirements for the structural integrity of miniature varistors are becoming higher. Packaging, as a key link in their production, transportation, storage, and assembly, directly affects product quality and efficiency. Currently, the industry commonly uses bag packaging for small varistors, which involves directly packing a certain number of products into plastic or composite bags and sealing them by heat sealing or binding. This method is widely used in the packaging of small varistors due to its simplicity, low cost, and lack of complex equipment requirements. However, bagged packaging has significant drawbacks: First, the metal pins of small varistors are easily bent by external forces. Disorderly stacking and lack of isolation within the bag mean that external forces such as bumps during transport and stacking during storage can cause pins to bend, affecting assembly accuracy and even damaging the product. Second, the pins are sharp, and the packaging bag has poor puncture resistance, making it easy for the pins to puncture the bag, leading to product exposure, contamination, loss, and further increasing the risk of pin bending. Therefore, developing packaging structures that can prevent pin bending and bag puncture has become an urgent problem to be solved in the field of electronic component packaging. Utility Model Content

[0003] In view of the shortcomings of the prior art, this utility model provides a packaging structure for small varistors, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a packaging structure for small varistors, comprising a bottom box and a cover plate, wherein the cover plate is rotatably connected to one side of the bottom box, and the other side of the cover plate is detachably connected to the bottom box; Multiple slots for placing varistors are provided inside the bottom box; The varistor includes two leads and a ceramic core; Corresponding to the pins, two limiting slots are provided inside the placement slot for the two pins to be inserted respectively. A circular slot for placing the ceramic core is also provided inside the placement slot. Elastic members are provided on both the left and right sides of the inner wall of the circular groove, and the two elastic members are flush with the inner bottom wall of the bottom box.

[0005] Furthermore, both the base box and the elastic element are made of plastic.

[0006] Furthermore, an arc-shaped groove communicating with the inner wall of the circular groove is formed therein.

[0007] Furthermore, corresponding to the multiple placement slots, multiple pressing blocks are provided on the side of the cover plate facing the bottom box.

[0008] Furthermore, the pressing block is shaped like a hollow cylinder and is made of elastic plastic.

[0009] Furthermore, the multiple placement slots are arranged in a rectangular row on the bottom box.

[0010] Compared with the prior art, the technical solution of this application has the following beneficial effects: This packaging structure for small varistors uses limiting grooves to fix the pins, avoiding bending caused by disordered stacking of pins in traditional bag packaging. A circular groove and elastic element clamp the ceramic core, and the lower pressure block further restricts omnidirectional displacement of the varistor, reducing the risk of damage to the ceramic core from vibration and impact. Simultaneously, the sealed protection of the bottom box and cover prevents dust and moisture contamination and pin puncture. Compared to traditional bag packaging, the damage rate of varistors is significantly reduced, ensuring product quality upon leaving the factory. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the connection structure between the placement groove and the varistor of this utility model; Figure 3 This is a schematic diagram of the disassembled structure of the placement slot and the varistor of this utility model.

[0012] In the diagram: 1. Base box; 2. Cover plate; 3. Lower pressure block; 101. Placement groove; 102. Limiting groove; 103. Circular groove; 104. Elastic component; 105. Arc groove. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figure 1-3This embodiment presents a packaging structure for small varistors. Addressing the issues of easily bent varistor leads and easily punctured packaging bags caused by traditional bag packaging, this structure achieves precise fixation and comprehensive protection for small varistors through partitioned positioning, elastic clamping, and flip-top protection. It is suitable for scenarios such as production, storage, transportation, and assembly of small varistors.

[0015] The varistor in this embodiment is mainly composed of pins and a ceramic core.

[0016] The core components of the packaging structure include a bottom box 1, a cover plate 2, and a lower pressing block 3. Specifically, the bottom box 1 is a rectangular box made of plastic material, preferably high-strength ABS plastic, which has both toughness and wear resistance. Multiple placement slots 101 are provided inside, and the multiple placement slots 101 are distributed in a rectangular array, which can orderly accommodate multiple small varistors and avoid collision damage caused by disorderly stacking. Furthermore, each placement slot 101 is equipped with a limiting slot 102, a circular slot 103, an elastic element 104, and an arc-shaped slot 105 adapted to the varistor structure, providing precise positioning space for the ceramic core and pins of the varistor. One side of the bottom box 1 is rotatably connected to the cover plate 2, and the other side is detachably connected to the cover plate 2, which can realize flip-top opening and closing, which is convenient for taking out the varistor and can form a closed space when closed to isolate external dust and impurities.

[0017] In detail, the placement slot 101 is a groove opened inside the bottom box 1 to accommodate the varistor, and the limiting slot 102 consists of two strip-shaped grooves, which are opened corresponding to the two pins of the varistor for the pins to be embedded; the depth and width of the limiting slot 102 are adapted to the pin size, which can completely wrap and limit the pins, avoid the pins from being bent by external force during transportation or handling, and prevent the pins from being worn due to random shaking. Furthermore, a circular groove 103 is formed in the center of the placement groove 101 to place the ceramic core of the varistor. The diameter is adapted to the ceramic core to ensure that the ceramic core will not shift horizontally after being placed. Preferably, the elastic element 104 is an arc-shaped elastic protrusion made of plastic, located on the left and right sides of the inner wall of the circular groove 103, and flush with the inner bottom wall of the base box 1. When the ceramic core is placed into the circular groove 103, the elastic element 104 is squeezed to generate elastic force and adheres to the inner wall of the circular groove 103. When the ceramic core moves to below the elastic element 104, the elastic element 104 automatically springs back to its original position and is located above the ceramic core, further restricting its displacement. The arc-shaped groove 105 is opened in the inner wall of the circular groove 103 and communicates with the circular groove 103. Its curvature is adapted to the operation of fingers or tweezers. When it is necessary to remove the varistor, the ceramic core can be easily pushed out of the circular groove 103 by inserting a tool or finger through the arc-shaped groove 105, solving the problem of difficulty in removal of traditional tightly positioned structures.

[0018] In addition, the cover plate 2 is a rectangular plastic plate of the same material as the bottom box 1. One side is rotatably connected to the bottom box 1, and the other side is detachably connected to the bottom box 1 by a buckle. Multiple pressing blocks 3 are provided on the side of the cover plate 2 facing the bottom box 1. When closed, the varistor can be pressed from above, and the positioning structure of the bottom box 1 can achieve bidirectional fixation from top to bottom. The cover plate 2 can cover the opening of the bottom box 1 as a whole, forming a closed protective space to prevent the varistor from falling out of the placement slot 101 during transportation.

[0019] Preferably, the lower pressure block 3 is a hollow cylindrical structure made of elastic plastic and fixed to the inside of the cover plate 2; In actual use, when the cover plate 2 is closed, the lower pressure block 3 is aligned with the top of the ceramic core in the placement slot 101. Through its own elastic deformation, it gently presses the ceramic core from above, which will not damage the ceramic core due to excessive pressure, and can also limit the vertical displacement of the varistor, avoiding vertical jumping caused by transportation bumps. The hollow structure can reduce the weight of the lower pressure block 3, and at the same time reduce the contact area with the ceramic core, reducing the resistance to separating the lower pressure block 3 from the ceramic core before use.

[0020] The working principle of the above embodiments is as follows: (1) The operator first opens the cover plate 2 and puts the small varistors one by one into the placement slot 101 of the bottom box 1. Align the two pins of the varistor with the two limiting slots 102 in the placement slot 101, and fully embed the pins into the limiting slots 102 to achieve the lateral positioning of the pins. At the same time, the ceramic core of the varistor is placed into the circular slot 103. The ceramic core squeezes the elastic members 104 on both sides of the circular slot 103. The elastic members 104 generate elastic force to clamp the ceramic core from both sides to complete the longitudinal positioning of the ceramic core.

[0021] (2) After placement, flip the cover plate 2 to cover the opening of the bottom box 1 and fasten the buckle to make the cover plate 2 and the bottom box 1 tightly connected; at this time, the lower pressing block 3 on the inner side of the cover plate 2 is aligned with the top of the ceramic core in each placement slot 101. The lower pressing block 3 gently presses the ceramic core due to its own elastic deformation, restricting the vertical displacement of the varistor from above; together with the limiting slot 102 and the elastic element 104 of the bottom box 1, a four-way fixation is formed to ensure that the varistor has no displacement space in the packaging.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A packaging structure for small varistors, comprising a base box (1) and a cover plate (2), characterized in that: The cover plate (2) is rotatably connected to one side of the bottom box (1), and the other side of the cover plate (2) is detachably connected to the bottom box (1); Multiple placement slots (101) for placing varistor resistors are provided inside the bottom box (1). The varistor includes two leads and a ceramic core; Corresponding to the pin, two limiting grooves (102) are opened inside the placement groove (101) for the two pins to be inserted respectively. A circular groove (103) for placing the ceramic core is also opened inside the placement groove (101). Elastic members (104) are provided on both the left and right sides of the inner wall of the circular groove (103), and the two elastic members (104) are flush with the inner bottom wall of the bottom box (1).

2. The packaging structure for a small varistor according to claim 1, characterized in that: Both the bottom box (1) and the elastic element (104) are made of plastic.

3. The packaging structure for a small varistor according to claim 1, characterized in that: An arc-shaped groove (105) communicating with the inner wall of the circular groove (103) is provided.

4. The packaging structure for a small varistor according to claim 1, characterized in that: Corresponding to the multiple placement slots, multiple pressing blocks (3) are provided on the side of the cover plate (2) facing the bottom box (1).

5. A packaging structure for a small varistor according to claim 4, characterized in that: The shape of the pressing block (3) is a hollow cylinder, and the pressing block (3) is made of elastic plastic.

6. The packaging structure for a small varistor according to claim 1, characterized in that: The multiple placement slots (101) are arranged in a rectangular row on the bottom box (1).

Images