CN213367404U

CN213367404U - Voltage dependent resistor

Info

Publication number: CN213367404U
Application number: CN202021736506.6U
Authority: CN
Inventors: 杜承丁
Original assignee: Guangdong Huijie Electric Power Group Co Ltd
Current assignee: Guangdong Huijie Electric Power Group Co Ltd
Priority date: 2020-08-19
Filing date: 2020-08-19
Publication date: 2021-06-04
Anticipated expiration: 2030-08-19

Abstract

The utility model relates to the technical field of electric power, specifically a piezoresistor, including adjustable piezoresistor device, adjustable piezoresistor device includes the box, be provided with switching device on the box, switching device is connected with the varistor device through the second wire, the varistor device includes casing first piezoresistor component, second conductive metal piece, second piezoresistor component, third conductive metal piece, first metal sheet, fourth conductive metal piece, second metal sheet, third metal sheet, sliding contact device; a plurality of piezoresistors can be connected in parallel in the circuit, the circuit does not need to be disassembled to weld the resistors again, and time and labor are saved.

Description

Voltage dependent resistor

Technical Field

The utility model relates to an electric power tech field specifically is a piezo-resistor.

Background

The piezoresistor is a voltage-limiting type protection device. By utilizing the nonlinear characteristic of the piezoresistor, when overvoltage appears between two poles of the piezoresistor, the piezoresistor can clamp the voltage to a relatively fixed voltage value, thereby realizing the protection of a post-stage circuit. The main parameters of the varistor are: voltage dependent voltage, current capacity, junction capacitance, response time, etc.

Chinese patent (publication No. CN203596229U) the utility model discloses a varistor, including zinc oxide varistor ceramic chip, two pins, epoxy top layer, the inner of two pins is respectively through soldering tin welding at the middle part on the symmetrical surface of zinc oxide varistor ceramic chip, outside the outside zinc oxide varistor ceramic chip that extends of external end, epoxy top layer parcel body, its pin is equipped with the kink to the outside in the relative department in zinc oxide varistor ceramic chip border, forms the skew clearance between external end after the kink and the zinc oxide varistor ceramic chip. The utility model provides a piezoresistor which can ensure the stability of the product without electric arc generated by the copper pin in the lightning stroke test process; however, when the device needs to change the breakover voltage of the piezoresistor in the using process, the circuit needs to be welded again, and time and labor are wasted.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a piezoresistor to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a voltage dependent resistor comprises an adjustable voltage dependent resistor device, the adjustable voltage dependent resistor device comprises a box body, a first positive connector lug is arranged on the box body, the first positive connector lug is connected with a switch device through a first conducting wire, the switch device is connected with a resistance changing device through a second conducting wire, the resistance changing device comprises a shell, the shell is connected with the second conducting wire, the second conducting wire is connected with a first voltage dependent resistor element through a first conducting metal sheet, the first voltage dependent resistor element is connected with a second voltage dependent resistor element through a second conducting metal sheet, the second conducting metal sheet is connected with a first metal plate through a third conducting metal sheet, the second voltage dependent resistor element is connected with a second metal plate through a fourth conducting metal sheet, the first metal plate and the second metal plate are both arranged in the shell, and the shell is connected with a third conducting wire, the third wire is connected with the negative pole connector lug, the third wire is connected with the sliding contact device through the third metal sheet, the sliding contact device is including moving the casing, it is provided with first fixed block on the casing to move, it is provided with the guide block on the casing to move, the guide block is through first spout sliding connection on the casing, it is provided with flexible groove in the casing to move, flexible groove has the sliding block through spring coupling, the sliding block is connected with fifth conductive metal piece through first metal sheet, fifth conductive metal piece is connected with the second metal sheet, second metal sheet sliding connection is on first metal sheet.

As a further improvement of the utility model: the first fixing block is made of insulating plastic.

As a further improvement of the utility model: and the third metal plate is provided with a groove.

As a further improvement of the utility model: the box body is provided with gear scales.

As a further improvement of the utility model: the switch device comprises a switch box, a second chute is arranged in the switch box, a second guide block is arranged on the second chute, the material of the second guide block is insulating plastic, a second fixed block is arranged on the second guide block, a first U-shaped groove and a second U-shaped groove are arranged on the second guide block, a U-shaped metal sheet is arranged on the first U-shaped groove, the U-shaped metal sheet is connected to the first guide wire through a positive elastic metal sheet, the positive elastic metal sheet is connected to the switch box, the U-shaped metal sheet is connected to the second guide wire through a negative elastic metal sheet, and the negative elastic metal sheet is connected to the switch box.

Compared with the prior art, the beneficial effects of the utility model are that:

through first piezo-resistor component, the electrically conductive sheetmetal of second, second piezo-resistor component, the electrically conductive sheetmetal of second, the electrically conductive sheetmetal of third, first metal sheet, the electrically conductive sheetmetal of fourth, the second metal sheet, the third metal sheet, sliding contact device, first fixed block, first guide block, first spout, flexible groove, spring, sliding block, first metal block, the cooperation of second metal block for can connect a plurality of piezo-resistors in parallel in the circuit, need not to dismantle circuit rewelding resistance, labour saving and time saving.

Drawings

Fig. 1 is a top view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

fig. 3 is a schematic structural diagram of the adjustable varistor of the present invention;

fig. 4 is a schematic structural view of the sliding contact device of the present invention;

fig. 5 is a schematic structural diagram of the switching device of the present invention.

In the figure: 1-box, 2-switch device, 3-rheostat device, 4-gear scale, 5-adjustable piezoresistor device, 6-first positive connector lug, 7-negative connector lug, 8-first wire, 9-second wire, 10-third wire, 11-shell, 12-third metal plate, 13-sliding block, 14-first fixed block, 15-sliding contact device, 16-first guide block, 17-first sliding groove, 18-second metal plate, 19-fourth conductive metal sheet, 20-second piezoresistor element, 21-second conductive metal sheet, 22-third conductive metal sheet, 23-first piezoresistor element, 24-first conductive metal sheet, 25-first metal plate, 27-movable shell, 28-second metal block, 29-fifth conductive metal sheet, 30-first metal block, 31-spring, 32-telescopic groove, 33-negative electrode elastic metal sheet, 34-second U-shaped groove, 35-second fixed block, 36-first U-shaped groove, 37-U-shaped metal sheet, 38-second guide block, 39-switch box, 40-positive electrode elastic metal sheet, 41-second chute and 42-groove.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Example one

Referring to fig. 1 to 4, a varistor comprises an adjustable varistor device 5, the adjustable varistor device 5 comprises a case 1, a first positive connector 6 is disposed on the case 1, the first positive connector 6 is connected to a switch device 2 through a first conductive wire 8, the switch device 2 is connected to a varistor device 3 through a second conductive wire 9, the varistor device 3 comprises a housing 11, the housing 11 is connected to the second conductive wire 9, the second conductive wire 9 is connected to a first varistor element 23 through a first conductive metal sheet 24, the first varistor element 23 is connected to a second varistor element 20 through a second conductive metal sheet 21, the second conductive metal sheet 21 is connected to a first metal plate 25 through a third conductive metal sheet 22, the second varistor element 20 is connected to a second metal plate 18 through a fourth conductive metal sheet 19, the first metal plate 25 and the second metal plate 18 are both disposed in the housing 11, the housing 11 is connected with the third wire 10, the third lead wire 10 is connected with a negative terminal 7, the third lead wire 10 is connected with a sliding contact device 15 through a third metal plate 12, the sliding contact device 15 comprises a movable housing 27, a first fixed block 14 is arranged on the movable housing 27, the movable shell 27 is provided with a first guide block 16, the first guide block 16 is connected on the shell 11 in a sliding way through a first sliding chute 17, a telescopic groove 32 is arranged in the movable shell 27, the telescopic groove 32 is connected with a sliding block 13 through a spring 31, the sliding block 13 is connected with a fifth conductive metal sheet 29 through a first metal block 30, the fifth conductive metal sheet 29 is connected with a second metal block 28, and the second metal block 28 is connected to the first metal plate 25 in a sliding manner; through the cooperation of the first piezoresistor element 23, the second conductive metal sheet 21, the second piezoresistor element 20, the third conductive metal sheet 22, the first metal plate 25, the fourth conductive metal sheet 19, the second metal plate 18, the third metal plate 12, the sliding contact device 15, the first fixed block 14, the first guide block 16, the first sliding groove 17, the telescopic groove 32, the spring 31, the sliding block 13, the first metal block 30 and the second metal block 28, a plurality of piezoresistors can be connected in parallel in the circuit, the circuit does not need to be disassembled to weld the resistors again, and time and labor are saved.

The first fixing block 14 is made of insulating plastic; the electric shock is prevented when the person pokes the first fixing block 14.

The third metal plate 12 is provided with a groove 42; by providing the groove 42, the sliding contact device 15 can be positioned at a specific position, and the shift position can be easily adjusted.

A gear scale 4 is arranged on the box body 1; when the piezoresistor incorporated in the circuit is adjusted, the adjustment state of the device can be determined by observing the gear scale 4.

Example two

On the basis of the first embodiment, referring to fig. 5, the switch device 2 includes a switch box 39, a second chute 41 is disposed in the switch box 39, a second guide block 38 is disposed on the second chute 41, the second guide block 38 is made of insulating plastic, a second fixed block 35 is disposed on the second guide block 38, a first U-shaped groove 36 and a second U-shaped groove 34 are disposed on the second guide block 38, a U-shaped metal sheet 37 is disposed on the first U-shaped groove 36, the U-shaped metal sheet 37 is connected to the first lead 8 through an anode elastic metal sheet 40, the anode elastic metal sheet 40 is connected to the switch box 39, the U-shaped metal sheet 37 is connected to the second lead 9 through a cathode elastic metal sheet 33, and the cathode elastic metal sheet 33 is connected to the switch box 39; through the cooperation of the switch box 39, the second chute 41, the second guide block 38, the second fixed block 35, the first U-shaped groove 36, the second U-shaped groove 34, the U-shaped metal sheet 37, the positive elastic metal sheet 40 and the negative elastic metal sheet 33, the second fixed block 35 can be shifted, the position of the second guide block 38 is changed, and the switch device 2 is in a conducting state or a disconnecting state.

The working process is as follows: through the matching of the switch box 39, the second sliding groove 41, the second guide block 38, the second fixed block 35, the first U-shaped groove 36, the second U-shaped groove 34, the U-shaped metal sheet 37, the positive elastic metal sheet 40 and the negative elastic metal sheet 33, the second fixed block 35 can be shifted, the position of the second guide block 38 can be changed, so that the switch device 2 is in a conducting state or a disconnecting state, through the matching of the first piezoresistor element 23, the second conductive metal sheet 21, the second piezoresistor element 20, the third conductive metal sheet 22, the first metal plate 25, the fourth conductive metal sheet 19, the second metal plate 18, the third metal plate 12, the sliding contact device 15, the first fixed block 14, the first guide block 16, the first sliding groove 17, the telescopic groove 32, the spring 31, the sliding block 13, the first metal block 30 and the second metal block 28, a plurality of piezoresistors can be connected in parallel in a circuit, need not to dismantle the circuit and weld resistance again, labour saving and time saving, when the piezo-resistor of circuit is incorporated into in the regulation, the accessible is observed and is kept off position scale 4 and confirm device regulation state.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A voltage dependent resistor comprises an adjustable voltage dependent resistor device (5) and is characterized in that the adjustable voltage dependent resistor device (5) comprises a box body (1), a first positive connector lug (6) is arranged on the box body (1), the first positive connector lug (6) is connected with a switch device (2) through a first lead (8), the switch device (2) is connected with a variable resistance device (3) through a second lead (9), the variable resistance device (3) comprises a shell (11), the shell (11) is connected with the second lead (9), the second lead (9) is connected with a first voltage dependent resistor element (23) through a first conductive metal sheet (24), the first voltage dependent resistor element (23) is connected with a second voltage dependent resistor element (20) through a second conductive metal sheet (21), the second conductive metal sheet (21) is connected with a first metal plate (25) through a third conductive metal sheet (22), the second piezoresistor element (20) is connected with a second metal plate (18) through a fourth conductive metal sheet (19), the first metal plate (25) and the second metal plate (18) are both arranged in the shell (11), the shell (11) is connected with a third lead (10), the third lead (10) is connected with a negative connector lug (7), the third lead (10) is connected with a sliding contact device (15) through a third metal plate (12), the sliding contact device (15) comprises a movable shell (27), a first fixed block (14) is arranged on the movable shell (27), a first guide block (16) is arranged on the movable shell (27), the first guide block (16) is connected on the shell (11) through a first sliding groove (17) in a sliding manner, a telescopic groove (32) is arranged in the movable shell (27), and the telescopic groove (32) is connected with a sliding block (13) through a spring (31), the sliding block (13) is connected with a fifth conductive metal sheet (29) through a first metal block (30), the fifth conductive metal sheet (29) is connected with a second metal block (28), and the second metal block (28) is connected to the first metal plate (25) in a sliding mode.

2. A varistor according to claim 1, characterized in that said first holding element (14) is made of insulating plastic material.

3. A varistor according to claim 1, characterized in that said third metal sheet (12) is provided with recesses (42).

4. A varistor according to claim 1, characterized in that the housing (1) is provided with gear graduations (4).

5. A varistor according to claim 1 or 2, characterized in that the switching device (2) comprises a switching box (39), a second runner (41) is arranged in the switching box (39), a second guide block (38) is arranged on the second runner (41), the second guide block (38) is made of insulating plastic, a second fixing block (35) is arranged on the second guide block (38), a first U-shaped groove (36) and a second U-shaped groove (34) are arranged on the second guide block (38), a U-shaped metal sheet (37) is arranged on the first U-shaped groove (36), the U-shaped metal sheet (37) is connected to the first conductor (8) by a positive elastic metal sheet (40), the positive elastic metal sheet (40) is connected to the switching box (39), the U-shaped metal sheet (37) is connected to the second conductor (9) by a negative elastic metal sheet (33), the negative elastic metal sheet (33) is connected to the switch box (39).