Safety type pressure sensitive resistor

Abstract

The utility model discloses a safe type pressure sensitive resistance relates to resistance technical field, including the package shell, the package shell inside is provided with auxiliary mechanism, the auxiliary mechanism includes insulating foam layer, warning strip and elastic diaphragm, in the utility model, elastic diaphragm one side is fixedly connected with insulating foam layer, microswitch one side is fixedly connected with the package shell, and the elastic diaphragm is deformed after being extruded by grain boundary assembly expansion, and insulating foam layer exerts force on trigger strip after being stressed, triggers microswitch, and the circuit can be cut off by microswitch, and warning strip extends through -hole, and the mechanical early warning of aging sign is carried out, and it is convenient for staff to check in time, and the maintenance difficulty of reducing subsequently, and the one side of spacing piece is inserted with the support block, can be positioned to the installation of support block, and the installation and fixation of package shell bottom can be assisted by support block and fixed block, reduce the looseness after pin insertion, guarantee the stability when installing package shell.

Description

Technical Field

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

[0002] A varistor is an electronic component with nonlinear voltage-current characteristics. Its resistance value changes significantly with the applied voltage. Its core feature is voltage sensitivity. When the voltage exceeds a certain threshold, the resistance drops sharply, thus providing overvoltage protection.

[0003] For example, Chinese patent CN218214844U discloses a safety type varistor, including a varistor body, a first protective shell and a second protective shell installed on the outer side of the varistor body, and the pins of the varistor body passing through and extending to the outer side of the first protective shell. Connecting strips are symmetrically installed on the first protective shell, and fixing grooves are opened on the connecting strips. Connecting grooves are symmetrically opened on the second protective shell, and the connecting strips are located inside the connecting grooves. A concave groove is opened on the second protective shell, and an adjustment and fixing mechanism is installed inside the concave groove, and the adjustment and fixing mechanism is connected to the fixing groove.

[0004] In the aforementioned patent, although the lack of protective structure and insufficient safety during resistor use is solved by the first and second protective shells, the core material of the varistor may still suffer grain boundary damage after multiple surges, leading to varistor voltage drift and increased leakage current. The presence of the mechanical structure can mask early signs of aging and increase maintenance difficulty. Utility Model Content

[0005] The purpose of this invention is to address the problem that in the prior art, the core material of the varistor may still suffer grain boundary damage after multiple surges, leading to varistor voltage drift and increased leakage current. The presence of mechanical structures can also mask early signs of aging, increasing maintenance difficulty. Therefore, this invention proposes a safe varistor.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a safety varistor, comprising a package shell, wherein an auxiliary mechanism is provided inside the package shell, the auxiliary mechanism comprising an insulating foam layer, a warning strip, and an elastic diaphragm, wherein a grain boundary component is attached to one side of the elastic diaphragm, and the other side of the elastic diaphragm is fixedly connected to the insulating foam layer, one side of the insulating foam layer is slidably connected to the inner wall of the package shell, a trigger strip is attached to one side of the insulating foam layer, one end of the trigger strip is connected to a micro switch, one side of the micro switch is fixedly connected to the inner wall of the package shell, a pressing end is inserted through the micro switch, the pressing end is slidably connected to the micro switch, and one end of the pressing end is hinged to the warning strip, and one end of the warning strip is rotatably connected to the micro switch.

[0007] Preferably, a connector one is fixedly connected to one side of the micro switch, a connector two is inserted inside the connector one, and one end of the connector two is fixedly connected to the grain boundary assembly.

[0008] Preferably, pins are fixedly connected to both sides of the grain boundary component, one end of the pin penetrates through the side wall of the package housing, and a through hole is opened on one side of the package housing.

[0009] Preferably, a plug-in block is inserted into the outer ring surface of the packaging shell, and a support block is fixedly connected to one side of the plug-in block, with the inner wall of the support block overlapping the outer ring surface of the packaging shell.

[0010] Preferably, the support block is penetrated by the pin, a fixing block is fixedly connected to one side of the support block, and a mounting hole is opened on one side of the fixing block.

[0011] Preferably, two limiting members are inserted into one side of the support block, and the two limiting members are engaged and connected.

[0012] Preferably, the inner wall of the limiting member is slidably connected to the outer casing, and one side of the limiting member overlaps with the fixing block.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, one side of the elastic diaphragm is fixedly connected to the insulating foam layer, and the other side of the micro switch is fixedly connected to the encapsulation shell. After the grain boundary component expands, it squeezes the elastic diaphragm to deform. After the insulating foam layer is stressed, it applies force to the trigger strip, triggering the micro switch. The micro switch can cut off the circuit. The warning strip extends out of the through hole to provide a mechanical early warning of signs of aging, making it easy for staff to check in time and reducing the difficulty of subsequent maintenance.

[0015] 2. In this utility model, the plug-in block is plugged into the package shell, and the limiting member is plugged into the support block. The top of the plug-in block is plugged into the package shell, and the limiting member is moved along the outer ring surface of the package shell. One side of the limiting member is plugged into the support block, which can limit the installation of the support block. The support block and the fixing block can assist in the installation and fixation of the bottom of the package shell, reduce the loosening after the pins are plugged in, and ensure the stability of the package shell during installation. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of a safety-type varistor is provided for this utility model;

[0017] Figure 2 A schematic diagram showing the connection between the support block and the limiting component of a safety varistor is provided for this utility model.

[0018] Figure 3 This utility model provides a schematic diagram of the installation of a plug-in block structure for a safety-type varistor;

[0019] Figure 4 This utility model provides a schematic diagram of the connection structure of a safety-type varistor.

[0020] Figure 5 This utility model provides a schematic diagram of the installation of a trigger strip structure for a safety-type varistor.

[0021] Legend: 1. Encapsulation shell; 2. Pin; 3. Support block; 4. Limiting component; 5. Through hole; 6. Insulating foam layer; 7. Grain boundary component; 8. Plug block; 9. Fixing block; 10. Micro switch; 11. Warning strip; 12. Connector one; 13. Elastic diaphragm; 14. Trigger strip; 15. Connector two; 16. Press end. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] Example 1: Refer to Figures 1-5 As shown: A safety varistor includes a package housing 1. An auxiliary mechanism is disposed inside the package housing 1. The auxiliary mechanism includes an insulating foam layer 6, a warning strip 11, and an elastic diaphragm 13. A grain boundary component 7 is attached to one side of the elastic diaphragm 13, and the other side of the elastic diaphragm 13 is fixedly connected to the insulating foam layer 6. One side of the insulating foam layer 6 is slidably connected to the inner wall of the package housing 1. A trigger strip 14 is attached to one side of the insulating foam layer 6, and a micro switch 10 is connected to one end of the trigger strip 14. One side of the micro switch 10 is fixedly connected to the inner wall of the package housing 1. A pressing end 16 is inserted through the micro switch 10. The pressing end 16 is slidably connected to the micro switch 10, and one end of the pressing end 16 is hinged to the warning strip 11. One end of the warning strip 11 is rotatably connected to the micro switch 10. A connector 12 is fixedly connected to one side of the micro switch 10. A connector 2 15 is inserted inside the connector 12. One end of the connector 2 15 is fixedly connected to the crystal boundary component 7. Pins 2 are fixedly connected to both sides of the crystal boundary component 7. One end of the pin 2 penetrates the side wall of the encapsulation shell 1. A through hole 5 is opened on one side of the encapsulation shell 1.

[0025] Two sets of insulating foam layers 6 and elastic diaphragms 13 are symmetrically arranged on both sides of the grain boundary component 7. They can monitor the deformation state of both sides of the grain boundary component 7. After the elastic diaphragm 13 deforms, it can squeeze the insulating foam layer 6, thereby driving the trigger strip 14 and the pressing end 16 to trigger the micro switch 10. The micro switch 10 can be connected to the encapsulation shell 1 through the first connector 12 and the second connector 15, which facilitates the subsequent circuit cut-off by the micro switch 10. The movement of the pressing end 16 can apply force to the warning strip 11, thereby changing the usage position of the warning strip 11 so that one end of the warning strip 11 protrudes from the through hole 5, which is convenient for timely warning and for staff to detect abnormal resistance and repair it in time. The encapsulation shell 1 can support the micro switch 10, which is convenient for the stable installation and use of the micro switch 10 inside the encapsulation shell 1.

[0026] Example 2: Figure 1 and Figure 2 As shown, a plug-in block 8 is inserted into the outer ring surface of the package shell 1. A support block 3 is fixedly connected to one side of the plug-in block 8. The inner wall of the support block 3 overlaps with the outer ring surface of the package shell 1. The support block 3 is penetrated by the pin 2. A fixing block 9 is fixedly connected to one side of the support block 3. A mounting hole is opened on one side of the fixing block 9. Two limiting members 4 are inserted into one side of the support block 3. The two limiting members 4 are engaged and connected. The inner wall of the limiting member 4 is slidably connected to the package shell 1. One side of the limiting member 4 overlaps with the fixing block 9.

[0027] The plug-in block 8 can guide the connection between the package housing 1 and the support block 3. The support block 3 can support the bottom of the package housing 1. The fixing block 9 can assist in the installation and fixation of the bottom of the package housing 1, improving the stability after the pin 2 is plugged in. The plugging of the limiting member 4 with the support block 3 can ensure the stable connection between the support block 3 and the package housing 1, reducing the loosening of the support block 3 during use.

[0028] The usage and working principle of this device are as follows: First, when the entire resistor is in normal use, pin 2 can be inserted into the installation area. Bolts are installed inside the fixing block 9 to assist in the installation and fixation of the encapsulation housing 1. When the support block 3 is not needed, the two limiting members 4 can be moved along the outer ring surface of the encapsulation housing 1 to separate the limiting members 4 from the support block 3. Then, the support block 3 is moved down, and the insertion block 8 is separated from the encapsulation housing 1, allowing the support block 3 to be disassembled. The encapsulation housing 1 and pin 2 can then be installed and used separately. When the encapsulation housing 1 is in normal use, one side of the warning strip 11 overlaps with the micro switch 10, and the two elastic diaphragms 13 are respectively attached to both sides of the grain boundary component 7. When the encapsulation housing 1 is in use... In case of an abnormality, when the crystal boundary component 7 is damaged and expands, the elastic diaphragm 13 is deformed by pressure, squeezing the insulating foam layer 6. The insulating foam layer 6 squeezes the trigger strip 14, and the trigger strip 14 squeezes the pressing end 16 of the micro switch 10, triggering the micro switch 10 and cutting off the circuit at the same time. After being subjected to force, the pressing end 16 moves and applies force to the warning strip 11, causing the warning strip 11 to rotate with one end as the center, so that the other end of the warning strip 11 separates from the micro switch 10 and extends out of the through hole 5. A fluorescent layer is provided on one side of the warning strip 11 for easy viewing by staff. A spring is installed between the outside of the pressing end 16 and the inner wall of the micro switch 10 to assist the subsequent reset of the pressing end 16.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present 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 the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A safety-type varistor, comprising a package (1), characterized in that: An auxiliary mechanism is provided inside the encapsulation shell (1). The auxiliary mechanism includes an insulating foam layer (6), a warning strip (11), and an elastic diaphragm (13). A grain boundary component (7) overlaps on one side of the elastic diaphragm (13), and the other side of the elastic diaphragm (13) is fixedly connected to the insulating foam layer (6). One side of the insulating foam layer (6) is slidably connected to the inner wall of the encapsulation shell (1). A trigger strip (14) overlaps on one side of the insulating foam layer (6). A micro switch (10) is connected to one end of the trigger strip (14). One side of the micro switch (10) is fixedly connected to the inner wall of the encapsulation shell (1). A pressing end (16) is inserted through the micro switch (10). The pressing end (16) is slidably connected to the micro switch (10), and one end of the pressing end (16) is hinged to the warning strip (11). One end of the warning strip (11) is rotatably connected to the micro switch (10).

2. The safety-type varistor according to claim 1, characterized in that: The micro switch (10) is fixedly connected to one side of a connector one (12), and a connector two (15) is inserted inside the connector one (12). One end of the connector two (15) is fixedly connected to the grain boundary component (7).

3. The safety-type varistor according to claim 1, characterized in that: The grain boundary component (7) has pins (2) fixedly connected to both sides. One end of the pin (2) penetrates the side wall of the encapsulation shell (1), and a through hole (5) is opened on one side of the encapsulation shell (1).

4. The safety-type varistor according to claim 1, characterized in that: The outer ring surface of the encapsulation shell (1) is connected to a plug-in block (8), and a support block (3) is fixedly connected to one side of the plug-in block (8). The inner wall of the support block (3) overlaps with the outer ring surface of the encapsulation shell (1).

5. The safety-type varistor according to claim 4, characterized in that: The support block (3) is penetrated by the pin (2), and a fixing block (9) is fixedly connected to one side of the support block (3), and a mounting hole is opened on one side of the fixing block (9).

6. The safety-type varistor according to claim 5, characterized in that: Two limiting members (4) are inserted into one side of the support block (3), and the two limiting members (4) are engaged and connected.

7. The safety-type varistor according to claim 6, characterized in that: The inner wall of the limiting member (4) is slidably connected to the encapsulation shell (1), and one side of the limiting member (4) overlaps with the fixing block (9).

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