Piezoresistor

Abstract

The utility model discloses a piezoresistor which comprises a resistor body and electrodes, the resistor body is a multilayer piezoresistor, the electrodes comprise a first electrode and a second electrode, a shell is sleeved on the outer side of the resistor body, the first electrode and the second electrode are both exposed out of the shell, an expansion machine shell is arranged on the outer wall of the shell, and a temperature control switch is installed on the expansion machine shell. A first temperature control switch is arranged on the expansion casing close to the first electrode, and a second temperature control switch is arranged on the expansion casing close to the second electrode. According to the piezoresistor, the temperature control switches are arranged, the first temperature control switch is used for warning that the temperature is close to a set value, the second temperature control switch is used for warning that the temperature exceeds the set value, the voltage on a circuit is detected in real time through the voltage detectors, and the two voltage detectors detect low voltage and high voltage respectively and can give out a warning; by arranging the buzzer and the indicator lamp, the circuit abnormity is reminded, and by means of the signal sending device, a worker can be remotely reminded of the circuit abnormity, and leakage current is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pressure sensitive resistance, specifically is a pressure sensitive resistance. BACKGROUND

[0002] Pressure sensitive resistors are widely used, including but not limited to power protection, motor protection, signal line protection, etc. However, pressure sensitive resistors also have their limitations. For example, their response time is relatively slow, usually in the nanosecond level, and they are relatively large in size, which is not suitable for fine protection of chip devices. In these cases, it may be necessary to use a TVS diode, as the TVS diode has a faster response time (picosecond level) and is smaller in size, making it suitable for more fine circuit protection.

[0003] Chinese patent publication No. CN215496229U, granted on January 11, 2022. It discloses a multi-layer pressure sensitive resistor, which includes a multi-layer stack structure and an external electrode structure. The multi-layer stack structure includes an insulating carrier, a plurality of first inner conductive layers disposed within the insulating carrier, and a plurality of second inner conductive layers disposed within the insulating carrier, and the plurality of first inner conductive layers and the plurality of second inner conductive layers are alternately arranged. The external electrode structure partially covers the multi-layer stack structure, and the external electrode structure includes a first external electrode layer electrically contacting the plurality of first inner conductive layers and a second external electrode layer electrically contacting the plurality of second inner conductive layers, and the first external electrode layer and the second external electrode layer cover the first side end and the second side end of the multi-layer stack structure, respectively. The technical scheme of the utility model realizes an improved multi-layer pressure sensitive resistor.

[0004] From the above application, it can be seen that the existing pressure sensitive resistor has a relatively high clamping voltage when subjected to a large current, which may cause the protected device to still be subjected to a certain voltage impact during an overvoltage event. At a lower operating voltage, the pressure sensitive resistor may have a larger leakage current, which may cause the element to age faster. Therefore, a pressure sensitive resistor is proposed. Utility model content

[0005] The utility model aims at providing a pressure sensitive resistor, which is provided with a temperature control switch, a first temperature control switch is used for warning that the temperature approaches the set value, a second temperature control switch is used for warning that the temperature exceeds the set value, and a voltage detector is used for real-time detection of the voltage on the line, two voltage detectors detect low voltage and high voltage respectively, and can issue a warning; a buzzer and an indicator light are provided to remind of the abnormality of the line, and a signal sending device is further provided to remotely remind the staff of the abnormality of the line.

[0006] In order to achieve the above object, the utility model adopts the main technical scheme: a pressure sensitive resistor, include: resistance body and electrode, the resistance body is multilayer pressure sensitive resistor, the electrode includes first electrode and second electrode, the first electrode and the second electrode are arranged at both sides of the resistance body respectively, the resistance body outside is equipped with the shell, the first electrode and the second electrode all have exposed the shell, the shell outer wall is equipped with the expansion casing, the expansion casing is provided with two, the expansion casing is installed with temperature control switch, the expansion casing is close to the first electrode for first temperature control switch, the expansion casing is close to the second electrode for second temperature control switch.

[0007] Preferably, the first electrode and the second electrode are both installed with voltage detector, and the voltage detector is close to the outside of the shell.

[0008] Preferably, the expansion casing is installed with a buzzer, and the voltage detector is electrically connected with the buzzer.

[0009] Preferably, the expansion casing is installed with an indicator light, and the voltage detector is electrically connected with the buzzer and the indicator light.

[0010] Preferably, the expansion casing is internally installed with a signal sending device, the signal sending device is electrically connected with the voltage detector, and the signal sending device is signal connected with an external signal receiving device.

[0011] Preferably, the shell and the expansion casing are made of the same material, and the material is high-temperature coating powder, low-temperature coating powder, epoxy resin or plastic.

[0012] Preferably, the first electrode and the second electrode are both in a hairpin structure.

[0013] Preferably, the first electrode and the second electrode are made of bare copper, tinned copper, silver-plated copper, aluminum or tinned steel.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] The pressure sensitive resistor is provided with temperature control switches, the first temperature control switch is used for warning that the temperature approaches the set value, the second temperature control switch is used for warning that the temperature exceeds the set value, voltage detectors are provided for real-time detection of the voltage on the line, two voltage detectors detect low voltage and high voltage respectively and can issue a warning, a buzzer and an indicator light are provided for reminding the line abnormality, and a signal sending device is provided for remotely reminding the staff of the line abnormality to prevent leakage current. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1A three-dimensional schematic view of the pressure-sensitive resistor of the utility model;

[0017] Figure 2 A side view schematic view of the pressure-sensitive resistor of the utility model;

[0018] Figure 3 A side view schematic view of the pressure-sensitive resistor of the utility model;

[0019] Figure 4 A front view schematic view of the pressure-sensitive resistor of the utility model.

[0020] In the drawing: 100, resistance body; 110, first electrode; 120, second electrode; 130, voltage detector; 200, shell; 300, expansion chassis; 310, first temperature control switch; 320, second temperature control switch; 330, buzzer; 340, indicator light. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] Referring to Figures 1-4 A pressure-sensitive resistor, comprising: a resistance body 100 and an electrode, the resistance body 100 is a multilayer pressure-sensitive resistor, the electrode comprises a first electrode 110 and a second electrode 120, the first electrode 110 and the second electrode 120 are both in a hairpin structure, the manufacturing material of the first electrode 110 and the second electrode 120 is bare copper, tinned copper, silver-plated copper, aluminum or tinned steel, the first electrode 110 and the second electrode 120 are arranged on the two sides of the resistance body 100 respectively, a voltage detector 130 is mounted on the first electrode 110 and the second electrode 120, and the voltage detector 130 is close to the outside of a shell 200;

[0023] The resistance body 100 is sleeved with the shell 200 outside, the first electrode 110 and the second electrode 120 both leak out of the shell 200, an expansion chassis 300 is arranged on the outer wall of the shell 200, the expansion chassis 300 is provided with two, the manufacturing material of the shell 200 and the expansion chassis 300 is the same, and the manufacturing material is high-temperature coating powder, low-temperature coating powder, epoxy resin or plastic, a temperature control switch is mounted on the expansion chassis 300, the first temperature control switch 310 is arranged on the expansion chassis 300 close to the first electrode 110, and the second temperature control switch 320 is arranged on the expansion chassis 300 close to the second electrode 120;

[0024] A buzzer 330 is installed on the expansion housing 300. A voltage detector 130 is electrically connected to the buzzer 330. An indicator light 340 is installed on the expansion housing 300. The voltage detector 130 is electrically connected to the buzzer 330 and the indicator light 340. A signal transmitting device is installed inside the expansion housing 300. The signal transmitting device is electrically connected to the voltage detector 130 and is connected to an external signal receiving device.

[0025] Structural principle:

[0026] like Figures 1-4 As shown, on the line, voltage detector 130 is used to detect the values ​​of high and low voltage, first temperature control switch 310 is used to warn that the temperature is close to the set value and second temperature control switch 320 is used to warn that the temperature exceeds the set value. When there is leakage current in the line, buzzer 330 and indicator light 340 give audible and visual reminders, and signal transmitting device remotely reminds the staff at the receiving end.

[0027] In summary, this varistor, through the setting of temperature control switches, the first temperature control switch 310 is used to warn of the temperature approaching the set value, and the second temperature control switch 320 is used to warn of the temperature exceeding the set value. It also uses voltage detectors 130 to monitor the voltage on the line in real time, with the two detectors 130 detecting low voltage and high voltage respectively and issuing warnings. Furthermore, it uses a buzzer 330 and an indicator light 340 to alert staff to line abnormalities, and a signal transmitting device to remotely alert staff to line abnormalities, preventing leakage current.

[0028] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model 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 this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A varistor, characterized in that, include: The resistor body (100) and electrodes are provided. The resistor body (100) is a multilayer varistor. The electrodes include a first electrode (110) and a second electrode (120). The first electrode (110) and the second electrode (120) are respectively disposed on both sides of the resistor body (100). A shell (200) is provided on the outside of the resistor body (100). Both the first electrode (110) and the second electrode (120) protrude outside the shell (200). An extension shell (300) is provided on the outer wall of the shell (200). There are two extension shells (300). A temperature control switch is installed on the extension shell (300). The first temperature control switch (310) is located near the first electrode (110) on the extension shell (300), and the second temperature control switch (320) is located near the second electrode (120) on the extension shell (300).

2. A varistor according to claim 1, characterized in that: A voltage detector (130) is installed on both the first electrode (110) and the second electrode (120), and the voltage detector (130) is close to the outside of the housing (200).

3. A varistor according to claim 2, characterized in that: A buzzer (330) is mounted on the extended housing (300), and the voltage detector (130) is electrically connected to the buzzer (330).

4. A varistor according to claim 3, characterized in that: An indicator light (340) is installed on the extended housing (300), and the voltage detector (130) is electrically connected to the buzzer (330) and the indicator light (340).

5. A varistor according to claim 2, characterized in that: The extended housing (300) is equipped with a signal transmitting device, which is electrically connected to the voltage detector (130) and is also signal-connected to an external signal receiving device.

6. A varistor according to claim 5, characterized in that: The outer shell (200) and the extended housing (300) are made of the same material, namely high-temperature coating powder, low-temperature coating powder, epoxy resin or plastic.

7. A varistor according to claim 2, characterized in that: Both the first electrode (110) and the second electrode (120) have a loop-shaped structure.

8. A varistor according to any one of claims 1-7, characterized in that: The first electrode (110) and the second electrode (120) are made of bare copper, tin-plated copper, silver-plated copper, aluminum or tin-plated steel.

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