Surface mount pressure sensitive resistor

Abstract

The utility model discloses a surface mount type pressure sensitive resistance relates to resistance technical field, including resistance main part, the outside sleeve of resistance main part is connected with the packaging film, one side fixedly connected with the installation groove of packaging film, the inside fixedly bonded with the paste ring of installation groove, the other side fixedly bonded with the isolation ring of paste ring, the shape of paste ring and isolation ring is circular ring, the other side swing joint of packaging film has the pressing block. The utility model discloses through paste installation mode and installs pressure sensitive resistance, can significantly reduce the installation space occupancy, effectively reduces the risk of the physical interference with the surrounding components, guarantees the convenience of installation process and the connection reliability simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of resistor technology, and in particular to a surface mount varistor. Background Technology

[0002] A varistor is a nonlinear resistor that is sensitive to voltage changes. Its core characteristic is that when the voltage applied across its terminals is below a certain threshold (nominal voltage), it exhibits high resistance; once the voltage exceeds this threshold, the resistance decreases sharply, thus quickly absorbing transient overvoltages (such as lightning surges and switching overvoltages) and clamping the voltage within a safe range. This protects sensitive components in the circuit that are susceptible to high-voltage damage. It is widely used for overvoltage protection in electronic equipment, power systems, and other fields.

[0003] In miniaturized devices, the internal space is highly constrained. Traditional plug-in varistors, due to their axial or radial lead structure design, have a relatively large overall size and a high vertical mounting height. This not only occupies a lot of planar space but also creates a noticeable bulge in the vertical direction. This structural characteristic makes it difficult to integrate into the compact layout of miniaturized devices, and they are prone to physical interference with surrounding components. Consequently, the overall size of the product cannot meet the miniaturization requirements, making it difficult to adapt to the space constraints of such devices. Utility Model Content

[0004] The purpose of this invention is to solve the problem that traditional plug-in varistors are difficult to adapt due to their large size and height in miniaturized equipment with limited internal space, and to propose a surface-mount varistor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a surface mount varistor, comprising a resistor body, an encapsulation film sleeved on the outside of the resistor body, a mounting groove fixedly connected to one side of the encapsulation film, a bonding ring fixedly bonded inside the mounting groove, an isolation ring fixedly bonded to the other side of the bonding ring, the bonding ring and the isolation ring being circular in shape, and a pressure block movably engaged on the other side of the encapsulation film.

[0006] Preferably, the outer side of the isolation ring is provided with a groove, and an isolation strip is fixedly connected inside the groove, with a dividing gap provided between the isolation strip and the two sides of the groove.

[0007] Preferably, mounting holes are symmetrically provided on the other side of the encapsulation film.

[0008] Preferably, a positioning rod is symmetrically fixedly connected to one side of the pressure block, and one end of the positioning rod is movably engaged inside the mounting hole.

[0009] Preferably, a positioning ring is movably sleeved on the outer side of one end of the positioning rod, and the positioning ring is pressed into the gap between the mounting hole and the positioning rod.

[0010] Preferably, a long strip is fixedly connected to the other side of the pressure block.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] 1. In this utility model, the varistor is installed by surface mounting, which can significantly reduce the installation space occupancy rate, effectively reduce the risk of physical interference with surrounding components, and at the same time ensure the convenience of the installation process and the reliability of the connection.

[0013] 2. In this utility model, by removing the pressure block, the overall volume of the resistor body is reduced, thus optimizing the internal space of the small device; in addition, with the assistance of the pressure block, the user can accurately align the resistor body directly above the area to be installed. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of a surface-mount varistor is provided for this utility model;

[0015] Figure 2 This utility model provides a schematic diagram illustrating the connection relationship between the mounting ring and the isolation ring in a surface-mount varistor.

[0016] Figure 3 This utility model provides a schematic diagram illustrating the connection relationship between the voltage block and the encapsulation film in a surface mount varistor.

[0017] Figure 4 This utility model presents a three-dimensional structural diagram of the voltage block in a surface mount varistor.

[0018] Legend: 1. Resistor body; 2. Encapsulation film; 21. Mounting hole; 3. Mounting groove; 31. Attachment ring; 4. Isolation ring; 41. Groove; 42. Isolation strip; 5. Pressure block; 51. Positioning rod; 52. Strip. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1: As Figure 1 - Figure 3 As shown, this utility model provides a surface mount varistor, including a resistor body 1, an encapsulation film 2 sleeved on the outside of the resistor body 1, a mounting groove 3 fixedly connected to one side of the encapsulation film 2, a mounting ring 31 fixedly bonded inside the mounting groove 3, and an isolation ring 4 fixedly bonded to the other side of the mounting ring 31. The mounting ring 31 and the isolation ring 4 are circular rings. A pressure block 5 is movably snapped onto the other side of the encapsulation film 2. A groove 41 is opened on the outside of the isolation ring 4, and an isolation strip 42 is fixedly connected inside the groove 41. A dividing gap is provided between the isolation strip 42 and the two sides of the groove 41.

[0022] The specific setup and function of this embodiment are described below. When installing this varistor inside a small device, the following steps should be followed: First, remove the isolation ring 4 on the adhesive ring 31 on one side of the encapsulation film 2, so that the adhesive surface of the adhesive ring 31 is fully exposed. When removing the isolation ring 4, use your fingers to pry the isolation strip 42 inside the groove 41, and then pull the isolation strip 42 outward. The isolation strip 42 will cause the isolation ring 4 to fall off from the adhesive surface of the adhesive ring 31. Then, flip the resistor body 1 over and hold the pressure block 5 by hand to keep it stable. After accurately aligning the resistor body 1 directly above the area to be installed, apply uniform downward pressure to the resistor body 1 in the vertical direction to make the adhesive ring 31 fully contact the mounting surface. During this process, it is necessary to ensure that the adhesive ring 31 completely adheres to the designated installation area and achieves reliable adhesion and fixation. After the adhesion is completed, remove the pressure block 5 to complete the entire installation process. Using this mounting method to install the varistor can significantly reduce the installation space occupancy rate, effectively reduce the risk of physical interference with surrounding components, and at the same time ensure the convenience of the installation process and the reliability of the connection.

[0023] Example 2: Figure 1 - Figure 4 As shown, the surface mount varistor of this utility model includes a resistor body 1, an encapsulation film 2 sleeved on the outside of the resistor body 1, a mounting groove 3 fixedly connected to one side of the encapsulation film 2, a bonding ring 31 fixedly bonded inside the mounting groove 3, and an isolation ring 4 fixedly bonded to the other side of the bonding ring 31. The bonding ring 31 and the isolation ring 4 are circular rings. A pressure block 5 is movably engaged on the other side of the encapsulation film 2. Mounting holes 21 are symmetrically opened on the other side of the encapsulation film 2. A positioning rod 51 is symmetrically fixedly connected to one side of the pressure block 5. One end of the positioning rod 51 is movably engaged inside the mounting hole 21. A positioning ring is movably sleeved on the outside of one end of the positioning rod 51. The positioning ring is pressed into the gap between the mounting hole 21 and the positioning rod 51. A strip 52 is fixedly connected to the other side of the pressure block 5.

[0024] The overall effect of this embodiment is that, during the disassembly of the pressure block 5, the following standardized procedures must be strictly followed: the operator should use their fingers to precisely hold the middle of the strip 52 to ensure a stable and reliable point of force application. During disassembly, a uniform and continuous upward pulling force should be applied to the strip 52 in a direction perpendicular to the surface of the resistor body 1. At the same time, another finger should be used to lightly press against the non-inductive area of ​​the resistor body 1 to form a counter-support to balance the force and prevent the resistor body 1 from shifting or deviating due to the force.

[0025] During this process, it is necessary to simultaneously observe the pulling status of the positioning rod 51 and the positioning ring from the mounting hole 21 to ensure that they smoothly separate along the axial direction, preventing deformation of the mounting hole 21 or the positioning component due to uneven force. Once the positioning rod 51 and the positioning ring are completely separated from the mounting hole 21, the disassembly of the pressure block 5 can be completed.

[0026] This design effectively avoids occupying space in the sensing area by making the force-bearing structure of the pressure block 5 independent of the sensing surface of the resistor body 1. At the same time, the integrated positioning component design further reduces the overall volume of the resistor body 1, providing significant assistance for space optimization inside small devices.

[0027] The usage and working principle of this device are as follows: When installing this varistor inside a small device, follow these steps: First, remove the isolation ring 4 on the adhesive ring 31 on one side of the encapsulation film 2, fully exposing the adhesive surface of the adhesive ring 31. While removing the isolation ring 4, use your fingers to move the isolation strip 42 inside the groove 41, and then pull the isolation strip 42 outwards. The isolation strip 42 will cause the isolation ring 4 to detach from the adhesive surface of the adhesive ring 31. Then, flip the resistor body 1 over and hold the pressure block 5 by hand to keep it stable. After accurately aligning the resistor body 1 directly above the area to be installed, apply uniform downward pressure to the resistor body 1 in a vertical direction to ensure that the adhesive ring 31 makes full contact with the mounting surface. During this process, ensure that the adhesive ring 31 completely adheres to the designated installation area and achieves reliable adhesion and fixation. After completing the adhesion, remove the pressure block 5 to complete the entire installation process.

[0028] During the disassembly of pressure block 5, the following procedures must be strictly followed: The operator should precisely grip the middle of the strip 52 with their fingers to ensure a stable and reliable point of force application. During disassembly, apply a uniform and continuous upward pulling force to the strip 52 in a direction perpendicular to the surface of the resistor body 1. Simultaneously, use another finger to gently press against the non-inductive area of ​​the resistor body 1 to create a counter-support and balance the force, preventing displacement or shifting of the resistor body 1 due to the force. During this process, simultaneously observe the pulling status of the positioning rod 51 and the positioning ring from the mounting hole 21, ensuring they smoothly detach axially to prevent deformation of the mounting hole 21 or the positioning assembly due to uneven force. Once the positioning rod 51 and the positioning ring are completely detached from the mounting hole 21, the disassembly of pressure block 5 is complete.

[0029] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A surface-mount varistor, comprising a resistor body (1), characterized in that: An encapsulation film (2) is sleeved on the outside of the resistor body (1). An installation groove (3) is fixedly connected to one side of the encapsulation film (2). A sticker ring (31) is fixedly glued inside the installation groove (3). An isolation ring (4) is fixedly glued to the other side of the sticker ring (31). The sticker ring (31) and the isolation ring (4) are circular. A pressure block (5) is movably snapped onto the other side of the encapsulation film (2).

2. The surface mount varistor according to claim 1, characterized in that: The outer side of the isolation ring (4) is provided with a groove (41), and an isolation strip (42) is fixedly connected inside the groove (41). A dividing gap is provided between the isolation strip (42) and the two sides of the groove (41).

3. A surface-mount varistor according to claim 1, characterized in that: Mounting holes (21) are symmetrically provided on the other side of the encapsulation film (2).

4. A surface-mount varistor according to claim 3, characterized in that: A positioning rod (51) is symmetrically fixedly connected to one side of the pressure block (5), and one end of the positioning rod (51) is movably engaged inside the mounting hole (21).

5. A surface-mount varistor according to claim 4, characterized in that: A positioning ring is movably sleeved on the outer side of one end of the positioning rod (51), and the positioning ring is pressed into the gap between the mounting hole (21) and the positioning rod (51).

6. A surface-mount varistor according to claim 1, characterized in that: A long strip (52) is fixedly connected to the other side of the pressure block (5).

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