CN213905049U

CN213905049U - Laminated chip piezoresistor

Info

Publication number: CN213905049U
Application number: CN202021846360.0U
Authority: CN
Inventors: 李志巡
Original assignee: Shenzhen Kangtai Songlong Electronic Technology Co ltd
Current assignee: Shenzhen Kangtai Songlong Electronic Technology Co ltd
Priority date: 2020-08-30
Filing date: 2020-08-30
Publication date: 2021-08-06
Anticipated expiration: 2030-08-30

Abstract

The utility model relates to a piezo-resistor technical field just discloses a range upon range of type slice piezo-resistor, including lower casing and last casing, the internal portion fixed surface all around of inferior valve installs the heat insulating layer, the inside bottom surface middle part fixed position of casing installs the circuit board down, circuit board one side fixed surface installs piezo-resistor, circuit board one side fixed mounting has the mounting groove. This laminated chip varistor installs the heat insulating layer in the inboard of casing down, and the inside temperature of varistor can be stabilized on the heat insulating layer, and at the during operation, when the fluctuation of a wide margin appears in the temperature, varistor's loss can not produce the change along with the fluctuation of temperature, effectively improves varistor's life, plays the inside effect of protection circuit board simultaneously.

Description

Laminated chip piezoresistor

Technical Field

The utility model relates to a piezo-resistor technical field specifically is a range upon range of type slice piezo-resistor.

Background

The piezoresistor is a resistor device with nonlinear volt-ampere characteristic, mainly used for clamping voltage when the circuit bears overvoltage, absorb redundant current to protect sensitive device, the piezoresistor is a voltage-limiting type protection device, and by utilizing the nonlinear characteristic of the piezoresistor, when the 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 the post-stage circuit, and the main parameters of the piezoresistor are piezovoltage, current capacity, junction capacitance, response time and the like.

The existing laminated chip piezoresistor can not keep constant temperature during working, and is easily affected by extreme conditions of high temperature and low temperature, when the temperature fluctuates greatly, the loss of the piezoresistor changes along with the fluctuation of the temperature, and the service life of the piezoresistor is affected.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a laminated chip varistor possesses advantages such as can keep inside constant temperature, effective protection internal element, has solved the problem that the background art provided.

(II) technical scheme

In order to realize the above-mentioned purpose that can keep inside constant temperature, effectively protect internal component, the utility model provides a following technical scheme: the utility model provides a range upon range of type slice piezo-resistor, includes casing and last casing down, the internal portion fixed surface all around of inferior valve has the layer that separates the temperature, the inside bottom surface middle part fixed mounting of casing has the circuit board down, circuit board one side fixed surface installs piezo-resistor, circuit board one side fixed mounting has the mounting groove, mounting groove one side surface one end fixed mounting has anodal spliced pole, anodal spliced pole runs through casing one side surface down, mounting groove one side surface other end fixed mounting has the negative pole spliced pole, the negative pole spliced pole runs through casing one side surface down, anodal spliced pole and the equal fixed mounting in negative pole spliced pole one side surface have the wiring hole.

Preferably, the protection plate is fixedly installed at the middle part of the surface of one side inside the lower shell, the insulating film is fixedly installed on the surface of one side inside the installation groove, and the electrolytic paper is fixedly installed on the surface of the other side inside the installation groove.

Preferably, the positive connecting column is parallel to the negative connecting column, and the upper shell is parallel to the lower shell.

Preferably, two ends of one side surface of the lower shell are respectively provided with a plurality of clamping grooves, two ends of one side surface of the upper shell are respectively and fixedly provided with a plurality of clamping blocks, and each clamping block is fastened with the clamping groove.

Preferably, the positive connecting column is electrically connected with the circuit board, the negative connecting column is electrically connected with the circuit board, and the circuit board is electrically connected with the piezoresistor.

Preferably, a plurality of protection pads are fixedly installed on the periphery of the surface of one side of the installation groove, and the protection pads are made of rubber.

(III) advantageous effects

Compared with the prior art, the utility model discloses possess following beneficial effect:

1. this laminated chip varistor installs the heat insulating layer in the inboard of casing down, and the inside temperature of varistor can be stabilized on the heat insulating layer, and at the during operation, when the fluctuation of a wide margin appears in the temperature, varistor's loss can not produce the change along with the fluctuation of temperature, effectively improves varistor's life, plays the inside effect of protection circuit board simultaneously.

2. This laminated sheet piezo-resistor, the guard plate is installed to one side surface middle part position of internal portion of inferior valve, the guard plate is used for receiving exogenic action or when striking, play the cushioning effect to inside circuit board and piezo-resistor, the inside side surface mounting in mounting groove has the insulating film, the insulating film is used for keeping apart the metallic oxide granule and constitutes, the electrolytic paper is used for the decomposition to voltage, mounting groove side surface installs a plurality of protection pads all around and can effectively protect insulating film and inside resistance element can not produce the friction, can not make the insulating film edge produce the burr, can not lead to the inside phenomenon that suffers the damage of piezo-resistor to take place, effectively improve work efficiency.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

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

FIG. 3 is a schematic diagram of the circuit board structure of the present invention;

fig. 4 is a schematic view of the mounting groove structure of the present invention.

In the figure: 1. a lower housing; 2. an upper housing; 3. a positive connecting column; 4. a negative connecting column; 5. a wiring hole; 6. a clamping block; 7. a card slot; 8. a thermal insulation layer; 9. a circuit board; 10. a voltage dependent resistor; 11. a protection plate; 12. mounting grooves; 13. an insulating film; 14. electrolyzing paper; 15. and (6) a protective pad.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example one

Referring to fig. 1-4, a laminated chip varistor comprises a lower casing 1 and an upper casing 2, wherein a thermal insulation layer 8 is fixedly mounted on the peripheral surface inside the lower casing 1, a circuit board 9 is fixedly mounted at the middle position of the bottom surface inside the lower casing 1, a varistor 10 is fixedly mounted on the surface of one side of the circuit board 9, a mounting groove 12 is fixedly mounted on one side of the circuit board 9, a positive connecting post 3 is fixedly mounted at one end of the surface of one side of the mounting groove 12, the positive connecting post 3 penetrates through the surface of one side of the lower casing 1, a negative connecting post 4 is fixedly mounted at the other end of the surface of one side of the mounting groove 12, the negative connecting post 4 penetrates through the surface of one side of the lower casing 1, wiring holes 5 are fixedly mounted on the surfaces of one sides of the positive connecting post 3 and the negative connecting post 4, the positive connecting post 3 and the negative connecting post 4 are parallel, the upper casing 2 and the lower casing 1 are parallel, and a plurality of clamping grooves 7 are formed at two ends of the surface of one side of the lower casing 1, go up 2 side surface both ends of casing equal fixed mounting of a plurality of fixture blocks 6, every fixture block 6 and draw-in groove 7 lock joints, positive spliced pole 3 and circuit board 9 electric connection, negative spliced pole 4 and circuit board 9 electric connection, circuit board 9 and piezo-resistor 10 electric connection, heat insulating layer 8 is installed to casing 1's inboard under, heat insulating layer 8 can stabilize the inside temperature of piezo-resistor 10, in operation, when fluctuation by a wide margin appears in the temperature, piezo-resistor 10's loss can not produce the change along with the fluctuation of temperature, effectively improve piezo-resistor 10's life, play the inside effect of protective circuit board 9 simultaneously.

Example two

Based on the first embodiment, as shown in fig. 1-4, a protection plate 11 is fixedly installed at a central position of one side surface inside a lower housing 1, an insulation film 13 is fixedly installed at one side surface inside a mounting groove 12, an electrolytic paper 14 is fixedly installed at the other side surface inside the mounting groove 12, a plurality of protection pads 15 are fixedly installed around one side surface of the mounting groove 12, the protection pads 15 are made of rubber, the protection plate 11 is installed at a central position of one side surface inside the lower housing 1, the protection plate 11 is used for buffering an internal circuit board 9 and a piezoresistor 10 when being subjected to an external force or impact, the insulation film 13 is installed at one side surface inside the mounting groove 12, the insulation film 13 is used for isolating metal oxide particles, and has a large resistance and a small leakage current under a low voltage, when a high voltage is applied, the insulation film 13 in the piezoresistor 10 becomes a conductor, voltage increases slightly, and the electric current sharply increases, is similar to the stabilivolt breakdown characteristic, can bear very big instantaneous power, and electrolytic paper 14 is used for the decomposition to voltage, and installation groove 12 one side surface is installed all around and is equipped with a plurality of protection pads 15 can effectively protect insulating film 13 and inside resistance element can not produce the friction, can not make insulating film 13 edge produce the burr, can not lead to the inside phenomenon of suffering the damage of piezo-resistor 10 to take place, effectively improves work efficiency.

The working principle is as follows: the inner side of the lower shell 1 is provided with a heat insulation layer 8, the heat insulation layer 8 can stabilize the temperature inside the piezoresistor 10, when the temperature fluctuates greatly during operation, the loss of the piezoresistor 10 can not change along with the fluctuation of the temperature, the service life of the piezoresistor 10 is effectively prolonged, and the inner part of the circuit board 9 is protected, in addition, the middle position of one side surface inside the lower shell 1 is provided with a protection plate 11, the protection plate 11 is used for buffering the circuit board 9 and the piezoresistor 10 when being impacted by external force, one side surface inside the installation groove 12 is provided with an insulating film 13, the insulating film 13 is used for isolating metal oxide particles, the insulation film 13 has large resistance and small leakage current under low voltage, when the voltage is increased, the insulating film 13 in the piezoresistor 10 becomes a conductor, and the voltage is slightly increased, the current sharply increases, is similar to the stabilivolt breakdown characteristic, can bear very big instantaneous power, and electrolytic paper 14 is used for the decomposition to voltage, and mounting groove 12 one side surface is installed all around and is equipped with a plurality of protection pads 15 can effectively protect insulating film 13 and inside resistance element can not produce the friction, can not make insulating film 13 edge produce the burr, can not lead to the inside phenomenon that suffers the damage of piezo-resistor 10 to take place, effectively improves work efficiency.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A laminated chip varistor comprises a lower shell (1) and an upper shell (2); the method is characterized in that: casing (1) inside fixed surface all around installs thermal insulation layer (8) down, casing (1) inside bottom surface middle part fixed mounting has circuit board (9) down, circuit board (9) one side fixed surface installs piezo-resistor (10), circuit board (9) one side fixed mounting has mounting groove (12), mounting groove (12) one side surface one end fixed mounting has anodal spliced pole (3), casing (1) one side surface is run through down in anodal spliced pole (3), mounting groove (12) one side surface other end fixed mounting has negative pole spliced pole (4), casing (1) one side surface is run through down in negative pole spliced pole (4), anodal spliced pole (3) and negative pole spliced pole (4) one side surface equal fixed mounting have wiring hole (5).

2. A laminated chip varistor as claimed in claim 1, wherein: the casing (1) inside side surface middle part fixed mounting has guard plate (11) down, the inside side surface fixed mounting of mounting groove (12) has insulating film (13), the inside opposite side surface fixed mounting of mounting groove (12) has electrolytic paper (14).

3. A laminated chip varistor as claimed in claim 1, wherein: the positive connecting column (3) is parallel to the negative connecting column (4), and the upper shell (2) is parallel to the lower shell (1).

4. A laminated chip varistor as claimed in claim 1, wherein: two ends of one side surface of the lower shell (1) are respectively provided with a plurality of clamping grooves (7), two ends of one side surface of the upper shell (2) are respectively and fixedly provided with a plurality of clamping blocks (6), and each clamping block (6) is buckled with the clamping groove (7).

5. A laminated chip varistor as claimed in claim 1, wherein: the positive connecting column (3) is electrically connected with the circuit board (9), the negative connecting column (4) is electrically connected with the circuit board (9), and the circuit board (9) is electrically connected with the piezoresistor (10).

6. A laminated chip varistor as claimed in claim 2, wherein: a plurality of protection pads (15) are fixedly mounted on the periphery of the surface of one side of the mounting groove (12), and the protection pads (15) are made of rubber.