CN211125218U - Piezoresistor protection structure and control cabinet - Google Patents
Piezoresistor protection structure and control cabinet Download PDFInfo
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- CN211125218U CN211125218U CN201921888105.XU CN201921888105U CN211125218U CN 211125218 U CN211125218 U CN 211125218U CN 201921888105 U CN201921888105 U CN 201921888105U CN 211125218 U CN211125218 U CN 211125218U
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Abstract
The utility model relates to a piezo-resistor protective structure and switch board, piezo-resistor protective structure include fire-retardant terminal, piezo-resistor and protecting sheathing. One end of the flame-retardant terminal is used for electrically connecting a wire, the piezoresistor comprises a resistor body and a pin, and the pin is electrically connected with the other end of the flame-retardant terminal. Be provided with accommodation space in the protective housing, fire-retardant terminal and piezo-resistor set up in accommodation space. The pin of the piezoresistor is electrically connected with one end of the flame-retardant terminal, the electric wire is electrically connected with the other end of the flame-retardant terminal, and the protective shell covers the piezoresistor. When the piezoresistor is burnt out, the flame-retardant terminal is arranged between the piezoresistor and the electric wire, so that the flame-retardant terminal plays a role in protection and can effectively prevent the fire from spreading to the electric wire. Meanwhile, the piezoresistor is arranged in the accommodating space of the protective shell, and the protective shell separates the piezoresistor from other electronic components so as to prevent the fire from spreading to other electronic components and reduce the damage degree of the product.
Description
Technical Field
The utility model relates to an electronic components protector technical field especially relates to a piezo-resistor protective structure and switch board.
Background
The voltage dependent resistor is a voltage protection device, has excellent nonlinear volt-ampere characteristics, and can clamp the voltage to a relatively fixed voltage value when a circuit bears overvoltage, so that the protection of a later-stage circuit is realized. The common piezoresistor does not have the functions of fire prevention and explosion prevention, and when voltage breakdown occurs, the piezoresistor is easy to overheat to burst and generate flame, so that a circuit on a circuit board is damaged. When the piezoresistor is burnt out due to overheating, the fire can spread to the periphery, and then other electronic components around the piezoresistor are burnt out, and the replacement cost of the piezoresistor and other electronic components is increased.
SUMMERY OF THE UTILITY MODEL
Therefore, a varistor protection structure and a control cabinet are needed to be provided, which can prevent the spread of fire and reduce the damage degree of products.
A varistor guard structure comprising:
the flame-retardant terminal is used for electrically connecting a wire at one end;
the piezoresistor comprises a resistor body and a pin, and the pin is electrically connected with the other end of the flame-retardant terminal;
the protection shell is internally provided with an accommodating space, and the flame-retardant terminal and the piezoresistor are arranged in the accommodating space.
The piezoresistor protection structure at least has the following advantages:
in the piezoresistor protection structure, the pin of the piezoresistor is electrically connected with one end of the flame-retardant terminal, the electric wire is electrically connected with the other end of the flame-retardant terminal, and the protection shell is covered outside the piezoresistor and the flame-retardant terminal. When the piezoresistor is burnt out due to abnormity, the flame-retardant terminal is arranged between the piezoresistor and the electric wire, so that the flame-retardant terminal plays a role in protection and can effectively prevent the fire from spreading to the electric wire. Meanwhile, the piezoresistor is arranged in the accommodating space of the protective shell, and the protective shell separates the piezoresistor from other electronic components so as to prevent the fire from spreading to other electronic components and reduce the damage degree of the product.
The technical solution is further explained below:
in one embodiment, the protective shell is a sheet metal shell, and an insulating layer is arranged on the outer surface of the sheet metal shell; alternatively, the first and second electrodes may be,
the protective shell is a high-temperature-resistant flame-retardant plastic shell.
In one embodiment, a channel for air to flow is arranged between the piezoresistor and the side wall of the protective shell.
In one embodiment, the protective shell is provided with an opening, and the opening is used for communicating the outside with the accommodating space.
In one embodiment, the protective shell is provided with a viewing hole.
In one embodiment, the varistor protection structure further comprises a circuit breaker, and the circuit breaker is arranged at the front end of the loop where the varistor is located.
In one embodiment, the varistor protection structure further comprises a first fastener, wherein the flame-retardant terminal is provided with a first lug, and the first lug is provided with a first mounting hole; the protective shell is characterized in that a mounting seat is arranged on the inner side wall of the protective shell, a second mounting hole is formed in the mounting seat, the second mounting hole corresponds to the first mounting hole, and the fastener is inserted into the first mounting hole and the second mounting hole.
In one embodiment, a second lug is arranged on the protective shell, a third mounting hole is arranged on the second lug, and a second fastener is inserted into the third mounting hole and used for mounting the protective shell on a control cabinet.
In one embodiment, the protective shell is provided with a notch for placing the electric wire.
The control cabinet comprises a cabinet body and a piezoresistor protection structure, wherein the piezoresistor protection structure is arranged on the cabinet body.
In the control cabinet, the pin of the piezoresistor is electrically connected with one end of the flame-retardant terminal, the electric wire is electrically connected with the other end of the flame-retardant terminal, and the protective shell is covered outside the piezoresistor and the flame-retardant terminal. When the piezoresistor is burnt out due to abnormity, the flame-retardant terminal is arranged between the piezoresistor and the electric wire, so that the flame-retardant terminal plays a role in protection and can effectively prevent the fire from spreading to the electric wire. Meanwhile, the piezoresistor is arranged in the accommodating space of the protective shell, and the protective shell separates the piezoresistor from other electronic components so as to prevent the fire from spreading to other electronic components and reduce the damage degree of the product.
Drawings
Fig. 1 is a schematic structural diagram of a varistor protection structure according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a protective housing in the varistor protective structure according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a piezoresistor in the piezoresistor protection structure according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a control cabinet according to an embodiment of the present invention.
Description of reference numerals:
10. protection structure, 11, varistor, 111, resistance body, 112, pin, 1121, first pin, 1122, second pin, 12, fire-retardant terminal, 121, first lug, 13, protective housing, 131, accommodation space, 132, top plate, 133, first curb plate, 1331, second lug, 134, second curb plate, 135, third curb plate, 136, bottom plate, 14, observation hole, 15, opening, 16, breach, 17, third mounting hole, 18, mount pad, 181, second mounting hole, 19, first fastener, 20, electric wire, 30, switch board, 31, the cabinet body, 32, electronic components.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
Referring to fig. 1 and fig. 3, an embodiment of a varistor protection structure includes a varistor 11, a flame retardant terminal 12, and a protective housing 13. The varistor 11 comprises a resistor body 111 and a pin 112, wherein the pin 112 is electrically connected with one end of the flame-retardant terminal 12; the other end of the flame retardant terminal 12 is used for electrically connecting the electric wire 20. An accommodating space 131 is provided in the protective case 13, and the flame retardant terminal 12 and the varistor 11 are provided in the accommodating space 131.
In the varistor protection structure, the pin 112 of the varistor 11 is electrically connected with one end of the flame retardant terminal 12, the wire 20 is electrically connected with the other end of the flame retardant terminal 12, and the protective casing 13 covers the varistor 11 and the flame retardant terminal 12. When the piezoresistor 11 is burnt due to abnormality, the flame-retardant terminal 12 is arranged between the piezoresistor 11 and the electric wire 20, and the flame-retardant terminal 12 plays a role in protection and can effectively prevent fire from spreading to the electric wire 20. Meanwhile, the piezoresistor 11 is arranged in the accommodating space 131 of the protective shell 13, and the piezoresistor 11 and other electronic components 32 are separated by the protective shell 13 so as to prevent the fire from spreading to other electronic components 32, thereby reducing the damage degree of the product.
In one embodiment, referring to fig. 1 and fig. 3, the varistor 11 includes a resistor body 111 and leads 112. The pin 112 includes a first pin 1121 and a second pin 1122, the first pin 1121 and the second pin 1122 are arranged at one side of the resistor body 111 side by side, the first pin 1121 is inserted into one wiring hole of the flame retardant terminal 12, and the second pin 1122 is inserted into another wiring hole of the flame retardant terminal 12. Specifically, the first pin 1121 and the second pin 1122 are both tin-plated copper wires, and the tin-plated copper wires can effectively prevent oxidation reaction, improve the heat dissipation performance of the first pin 1121 and the second pin 1122, and improve the electrical conductivity of the first pin 1121 and the second pin 1122.
Further, the protective casing 13 is made of a high temperature resistant and flame retardant material to isolate the piezoresistor 11 from other electronic components 32, so as to prevent the fire from spreading to other electronic components 32, thereby reducing the damage degree of the product. Specifically, the protective housing 13 is a sheet metal shell, and an insulating layer is disposed on the outer surface of the sheet metal shell. The sheet metal material is adopted to manufacture the protective shell 13, so that the protective shell 13 can be more conveniently processed, and meanwhile, the protective shell 13 can be more flexibly processed. Because the insulating layer has the effect of electrical insulation, through set up the insulating layer at the surface of panel beating shell, can avoid taking place the phenomenon of electric shock effectively. In this embodiment, since the metal material such as steel or aluminum has good high temperature resistance and impact resistance and is not easy to burn, the metal plate material such as steel or aluminum is used to manufacture the protective housing 13. Certainly, the protective casing 13 may also be a high-temperature resistant and flame retardant plastic casing, and the plastic casing may isolate the varistor 11 from the electronic component 32, so as to prevent the fire from spreading to the electronic component 32, thereby reducing the damage degree of the product.
In one embodiment, referring to fig. 1, 2 and 4, the protective housing 13 is a square housing. The protective casing 13 comprises a top plate 132, a first side plate 133, a second side plate 134, a third side plate 135 and a bottom plate 136, the top plate 132, the first side plate 133, the second side plate 134, the third side plate 135 and the bottom plate 136 enclose the protective casing 13 with an accommodating space 131, and the piezoresistor 11 and the flame-retardant terminal 12 are arranged in the accommodating space 131 of the protective casing 13. Specifically, the first side plate 133 and the second side plate 134 are connected to both sides of the top plate 132, and the first side plate 133 and the second side plate 134 are disposed opposite to each other. One side of the third side panel 135 is connected to the first side panel 133, and the other side of the third side panel 135 is connected to the second side panel 134. The bottom plate 136 is disposed opposite to the top plate 132, and the bottom plate 136 is connected to the first side plate 133, the second side plate 134, and the third side plate 135. When the varistor 11 is abnormally burnt, because the density of flame and smoke generated by burning objects is low, the flame and smoke will rise under the action of the air floating force, and the top plate 132 can preferentially block the spread of fire. Meanwhile, the first side plate 133, the second side plate 134, the third side plate 135 and the bottom plate 136 can also effectively prevent fire from spreading to other directions, and reduce the damage degree of other electronic components 32 around the piezoresistor 11.
In the present embodiment, the protective housing 13 of the varistor protective structure 10 is a square structure, and the square protective housing 13 will be described below. However, the shape of the protective housing 13 may be other shapes, such as a hemisphere, a cylinder, etc., and the shape of the protective housing 13 may be set according to actual conditions, which is not limited to this.
Further, referring to fig. 1, 2 and 4, a channel for air to flow is provided between the varistor 11 and the protective housing 13. The air in the accommodating space 131 can flow in the channel, so that the phenomena of arc discharge, short circuit and the like can be avoided. In addition, when the piezoresistor 11 is burnt out due to abnormality, the channel provides an isolation space, and can prevent fire from spreading to other electronic components 32, so that the damage degree of the product is reduced. In this embodiment, channels for air to flow are reserved between the piezoresistor 11 and the top plate 132, the first side plate 133, the second side plate 134, and the third side plate 135 of the protective housing 13, so as to avoid arcing and short circuit.
Specifically, the width of the channel is related to the rated voltage and current of the varistor 11. The larger the voltage rating and current rating of the varistor 11, the larger the width of the channel. For example, the rated voltage of the voltage dependent resistor 11 is 300V, the current of the voltage dependent resistor 11 does not exceed 15A, and the width of the channel is about 5 mm.
Further, referring to fig. 1 and 4, an opening 15 is formed on the protective housing 13, and the opening 15 is used for communicating the outside with the accommodating space 131. When the piezoresistor 11 is abnormally burnt, heat and smoke generated by burning of the piezoresistor 11 can be released to the outside through the opening 15, and the piezoresistor 11 is prevented from being burnt in the sealed protective shell 13 to cause explosion. Specifically, the position of the opening 15 is set according to the position of the other electronic component 32. In one embodiment, the opening 15 may be located on one side of the protective housing 13 when there are fewer electronic components 32 on that side of the protective housing 13. By providing the opening 15 on a smaller side of the electronic component 32, the number of damages of the electronic component 32 can be reduced. Of course, in another embodiment, if the electronic component 32 on one side of the protective housing 13 is not important, the opening 15 may be disposed on the side of the protective housing 13 to reduce the damage to the important electronic component 32 and reduce the replacement cost of the electronic component 32.
Specifically, referring to fig. 1 and 2, the opening 15 may be provided in a plurality, and the plurality of openings 15 are provided on the protective casing 13. By providing a plurality of openings 15 in the protective housing 13, the heat generated by combustion and the fumes are readily released to the outside. For example, the openings 15 are oppositely disposed on the first side plate 133 and the second side plate 134 of the protective casing 13, so that the smoke in the accommodating space 131 can be convected, and the smoke can be quickly released to the outside. Of course, at least one of the first side plate 133, the second side plate 134, the third side plate 135 and the bottom plate 136 may be in an open state to form the above-mentioned opening 15, so that the smoke is rapidly released to the outside. In the present embodiment, the opening 15 is provided on the bottom plate 136 of the shield case 13.
Further, referring to fig. 1, 2 and 4, the protective housing 13 is provided with a viewing hole 14. After the piezoresistor 11 is abnormal and burns, the piezoresistor 11 can be blackened, and a maintenance person can check the color of the piezoresistor 11 in the protective shell 13 through the observation hole 14 to judge whether the piezoresistor 11 is burnt or not, so that the maintenance person can conveniently take measures of replacing the piezoresistor 11 or repairing other electronic components 32. In the present embodiment, the observation hole 14 is provided on the third side plate 135 of the protective housing 13 to facilitate the maintenance personnel to observe the color of the varistor 11 to judge whether the varistor 11 has been burned out.
In another embodiment, the varistor protection structure 10 further comprises a circuit breaker, which is arranged at the front end of the circuit in which the varistor 11 is located. Specifically, the varistor 11 and the electronic component 32 in the power supply circuit are connected in parallel, and the circuit breaker is disposed at the front end of the power supply circuit. When the piezoresistor 11 is burnt out due to abnormality, the circuit breaker is in an off state, and the circuit breaker cannot be used for closing a circuit even if a power supply is electrified. By arranging the breaker at the front end of the loop where the piezoresistor 11 is located, whether the piezoresistor 11 is burnt can be judged.
Further, referring to fig. 1 and 2, the protective housing 13 is provided with a notch 16, and the notch 16 is adapted to the size of the electric wire 20. During installation, the electric wire 20 is placed in the notch 16, so that the electric wire 20 can conveniently extend out of the protective shell 13, and the phenomena of aging of an insulating layer of the electric wire 20 and electric leakage of the electric conductor due to long-time pressing of the electric wire 20 can be avoided. In this embodiment, the notch 16 is disposed on the base plate 136, and the electrical wires 20 are placed in the notch 16 of the base plate 136. Of course, the position of the notch 16 may be set according to the actual situation, such as the installation position of the flame retardant terminal 12, the orientation of the wire 20, etc., but not limited thereto.
Further, referring to fig. 1 and 2, the varistor guard structure 10 further comprises a first fastening member 19. The flame retardant terminal 12 is provided with a first lug 121, and the first lug 121 is provided with a first mounting hole, which is matched with the first fastening piece 19. Correspondingly, the protective housing 13 is provided with a mounting seat 18, the mounting seat 18 is provided with a second mounting hole 181, the position of the second mounting hole 181 corresponds to that of the first mounting hole, and the fastener is inserted into the first mounting hole and the second mounting hole 181. The flame-retardant terminal 12 is mounted on the protective shell 13 through the first fastener 19, so that on one hand, the flame-retardant terminal 12 can be prevented from shaking in the protective shell 13 to influence the voltage limiting effect of the piezoresistor 11; on the other hand, the flame retardant terminal 12 is detachably mounted on the protective housing 13, and the flame retardant terminal 12 can be detached from the protective housing 13 by means of a screwdriver, so that the varistor 11 can be maintained and replaced on site conveniently, and the use is convenient.
Specifically, referring to fig. 1 and 2, at least two mounting seats 18 are provided so that the flame retardant terminal 12 can be securely mounted on the mounting seat 18. When the flame-retardant terminal is used, the first lug 121 of the flame-retardant terminal 12 is placed corresponding to the mounting seat 18, the first mounting hole in the first lug 121 is aligned with or corresponds to the second mounting hole 181 in the mounting seat 18, and then the first fastener 19 is inserted into the first mounting hole and the second mounting hole 181. In the present embodiment, two mounting seats 18 are provided, two mounting seats 18 are symmetrically arranged, and the distance between the two mounting seats 18 is adapted to the size of the flame retardant terminal 12. The flame-retardant terminal 12 is arranged between the two mounting seats 18, on one hand, the two mounting seats 18 can play a role in clamping, the flame-retardant terminal 12 is stably arranged between the two mounting seats 18, and the flame-retardant terminal 12 is prevented from shaking in the protective shell 13 to influence the use of the piezoresistor 11; on the other hand, the balance of the flame retardant terminal 12 can be maintained, and the phenomenon that the flame retardant terminal 12 is damaged due to uneven stress can be prevented.
Further, referring to fig. 1, 2 and 4, a second protruding lug 1331 is disposed on the protective casing 13, a third mounting hole 17 is disposed on the second protruding lug 1331, and a second fastening member is inserted into the third mounting hole 17. When the protective housing 13 is mounted, the second lug 1331 of the protective housing 13 is attached to the control cabinet 30, the third mounting hole 17 of the second lug 1331 corresponds to the mounting hole of the control cabinet 30, and the second fastener is inserted into the third mounting hole 17, so that the protective housing 13 is mounted on the control cabinet 30. By detachably mounting the protective casing 13 on the control cabinet 30, the protective casing 13 can be detached from the control cabinet 30 by means of a screwdriver, so that the piezoresistor 11 can be conveniently maintained and replaced on site, and the use is convenient. Specifically, the second ledge 1331 may be provided with a plurality of third mounting holes 17 to facilitate secure mounting of the protective housing 13 to the control cabinet 30.
In one embodiment, the varistor protective structure 10 may be disposed on the control cabinet 30 of the elevator, and of course, the varistor protective structure 10 may be disposed on other devices, which is not limited to this. In the present embodiment, the varistor protection structure 10 may be disposed inside the control cabinet 30, or the varistor protection structure 10 may be disposed outside the control cabinet 30, for example, the varistor protection structure 10 is disposed on a side wall of the control cabinet 30, and the like, which is not limited thereto.
In one embodiment, referring to fig. 1 to 4, a control cabinet includes a cabinet body 31 and the varistor protection structure 10 in any of the above embodiments. The varistor protective structure 10 is arranged on the cabinet 31.
In the control cabinet, the pin 112 of the varistor 11 is electrically connected to one end of the flame retardant terminal 12, the wire 20 is electrically connected to the other end of the flame retardant terminal 12, and the varistor 11 and the flame retardant terminal 12 are disposed in the accommodating space 131 of the protective housing 13. When the piezoresistor 11 is burnt due to abnormality, the flame-retardant terminal 12 is arranged between the piezoresistor 11 and the electric wire 20, and the flame-retardant terminal 12 plays a role in protection and can effectively prevent fire from spreading to the electric wire 20. Meanwhile, the piezoresistor 11 is arranged in the accommodating space 131 of the protective shell 13, and the piezoresistor 11 and other electronic components 32 are separated by the protective shell 13 so as to prevent the fire from spreading to other electronic components 32, thereby reducing the damage degree of the product.
In one embodiment, the control cabinet 30 further includes an electronic component 32, the electronic component 32 is disposed in the power circuit in parallel with the varistor 11, and the circuit breaker is disposed at the front end of the power circuit. When the piezoresistor 11 is burnt out due to abnormality, the circuit breaker is in an off state, and the circuit breaker cannot be used for closing a circuit even if a power supply is electrified. The front end of the power circuit is provided with a breaker to judge whether the piezoresistor 11 is burnt or not.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A varistor guard structure, comprising:
the flame-retardant terminal is used for electrically connecting a wire at one end;
the piezoresistor comprises a resistor body and a pin, and the pin is electrically connected with the other end of the flame-retardant terminal;
the protection shell is internally provided with an accommodating space, and the flame-retardant terminal and the piezoresistor are arranged in the accommodating space.
2. The piezoresistor protection structure according to claim 1, wherein the protective shell is a sheet metal shell, and an insulating layer is arranged on the outer surface of the sheet metal shell; alternatively, the first and second electrodes may be,
the protective shell is a high-temperature-resistant flame-retardant plastic shell.
3. A varistor protective structure according to claim 1 or 2, characterized in that a channel for air flow is provided between said varistor and said side wall of said protective casing.
4. The varistor protection structure of claim 1 or 2, wherein said protective casing is provided with an opening for communicating the outside with said receiving space.
5. A varistor protective structure according to claim 1 or 2, characterized in that said protective casing is provided with a viewing aperture.
6. The varistor protection structure of claim 1 or 2, further comprising a circuit breaker, said circuit breaker being disposed at a front end of a loop in which said varistor is located.
7. The piezoresistor protection structure according to claim 1 or 2, further comprising a first fastener, wherein a first lug is arranged on the flame retardant terminal, and a first mounting hole is arranged on the first lug; the protective shell is characterized in that a mounting seat is arranged on the inner side wall of the protective shell, a second mounting hole is formed in the mounting seat, the second mounting hole corresponds to the first mounting hole, and the fastener is inserted into the first mounting hole and the second mounting hole.
8. The varistor protection structure of claim 1 or 2, wherein said protective casing is provided with a second lug, said second lug is provided with a third mounting hole, and said third mounting hole is used for inserting a second fastening member for mounting said protective casing on a control cabinet.
9. A varistor protective structure according to claim 1 or 2, characterized in that said protective casing is provided with notches for placing said electric wires.
10. A control cabinet, characterized by comprising a cabinet body and a varistor protective structure according to any one of claims 1 to 9, said varistor protective structure being arranged on said cabinet body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921888105.XU CN211125218U (en) | 2019-11-04 | 2019-11-04 | Piezoresistor protection structure and control cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921888105.XU CN211125218U (en) | 2019-11-04 | 2019-11-04 | Piezoresistor protection structure and control cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211125218U true CN211125218U (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921888105.XU Active CN211125218U (en) | 2019-11-04 | 2019-11-04 | Piezoresistor protection structure and control cabinet |
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| CN (1) | CN211125218U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112614639A (en) * | 2020-12-01 | 2021-04-06 | 辰硕电子(九江)有限公司 | MOV chip is with having explosion-proof pressure release's big module MOV installation component |
-
2019
- 2019-11-04 CN CN201921888105.XU patent/CN211125218U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112614639A (en) * | 2020-12-01 | 2021-04-06 | 辰硕电子(九江)有限公司 | MOV chip is with having explosion-proof pressure release's big module MOV installation component |
| CN112614639B (en) * | 2020-12-01 | 2022-04-26 | 辰硕电子(九江)有限公司 | MOV chip is with having explosion-proof pressure release's big module MOV installation component |
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