CN216014966U

CN216014966U - Paster type piezoresistor

Info

Publication number: CN216014966U
Application number: CN202122520373.XU
Authority: CN
Inventors: 陆韦亨
Original assignee: Guangdong Yukun Health Technology Co ltd
Current assignee: Guangdong Yukun Health Technology Co ltd
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2022-03-11
Anticipated expiration: 2031-10-20

Abstract

The utility model discloses a paster type piezoresistor relates to resistor technical field, including paster piezoresistor, protection casing and shrouding, paster piezoresistor sets up in protection casing, and protection casing's top is equipped with the open-ended mounting, and protection casing's open-ended mounting is provided with the shrouding, and two spread grooves have been seted up to protection casing's top symmetry, and two spread grooves distribute in open-ended mounting both sides, and protection casing is passed to the one end of spread groove, and the symmetry is fixed with two bar connection spare on the shrouding, and the spread groove is down "T" type with bar connection spare's cross sectional shape, two spread grooves respectively with two bar connection spare adaptations. The paster piezoresistor high temperature, the risk that probably exists the explosion, the piece that makes the paster piezoresistor through the protective housing can not splash and other original paper contacts, prevents the emergence of the circuit damage condition.

Description

Paster type piezoresistor

Technical Field

The utility model relates to a resistor technical field, concretely relates to paster type piezoresistor.

Background

The voltage dependent resistor is a short for voltage sensitive resistor, and is a nonlinear resistance element. The resistance value of the piezoresistor is related to the voltage applied at two ends, and the piezoresistor is characterized in that: at a given temperature, when the voltage exceeds a certain critical value, the resistance value is sharply reduced, the current passing through the resistance value is sharply increased, and the voltage and the current are not in a linear relationship. Although the voltage of the existing electrode patch piezoresistor can be limited, the problem that when the existing electrode patch piezoresistor works, the temperature of the electrode patch piezoresistor is too high, so that explosion is caused, fragments of the electrode patch piezoresistor are splashed to be contacted with other elements, and the whole circuit is damaged is caused.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned not enough among the prior art, the utility model provides a paster type piezoresistor for solve the problem mentioned in the above-mentioned background art.

In order to achieve the purpose of the invention, the technical scheme adopted by the utility model is as follows: a patch type piezoresistor comprises a patch piezoresistor, a protective shell and a sealing plate, wherein the patch piezoresistor is arranged in the protective shell, the top of the protective shell is provided with an installation opening, and the sealing plate is arranged at the installation opening of the protective shell;

two spread grooves have been seted up to protective housing's top symmetry, two the spread groove distributes in installation open-ended both sides, protective housing is passed to the one end of spread groove, the symmetry is fixed with two bar connecting piece on the shrouding, spread groove and bar connecting piece's cross sectional shape are "T" type, two the spread groove respectively with two bar connecting piece adaptation.

Adopt above-mentioned technical scheme's effect to be, the paster piezoresistor high temperature, probably have the risk of explosion, the piece of the paster piezoresistor that makes through protective housing can not splash and other original paper contacts, prevents the emergence of the circuit damage condition.

Furthermore, two symmetrical inner walls of the protective shell are respectively provided with a pressing mechanism, and the two pressing mechanisms are used for fixing the patch piezoresistor in the protective shell and enabling the patch piezoresistor and the sealing plate to be arranged at intervals.

The effect of adopting above-mentioned technical scheme does, fixes paster piezoresistor in the protective housing through hold-down mechanism, avoids paster piezoresistor and protective housing frequent collision to cause paster piezoresistor's damage.

Further, the pressing mechanism comprises a rubber pad and a moving plate, the moving plate can move close to the surface mounted piezoresistor, and the rubber pad is fixed on the end face of the moving plate close to the surface mounted piezoresistor.

The effect of adopting above-mentioned technical scheme does, and the movable plate drives the rubber pad and is close to the removal of paster piezoresistor, fixes paster piezoresistor in the protective housing through the rubber pad of two relative settings, plays insulating effect through the rubber pad is fixed.

Further, the pressing mechanism further comprises a bolt, the bolt is in threaded connection with the protective shell, the bolt penetrates through the protective shell and is fixedly connected with the moving plate, and the patch piezoresistor is located on a moving path of the bolt.

The effect of adopting above-mentioned technical scheme is, through outside or inside rotation bolt, drives the movable plate and keeps away from paster piezoresistor or be close to the removal of paster piezoresistor, makes piezoresistor's fixed simpler, has the advantage of being convenient for installation and dismantlement.

Further, the top of paster piezoresistor is equipped with first electrode, first electrode is connected with hot fuse mechanism, the shrouding is seted up the first through-hole that heat supply fuse mechanism passed, the bottom of paster piezoresistor is equipped with the second electrode, the second electrode is connected with the second metal terminal, the second through-hole that supplies the second metal terminal to pass is seted up to the bottom of protective housing.

The effect of adopting above-mentioned technical scheme does, through first metal terminal and second metal terminal with the welding of paster piezoresistor on the circuit board, makes the welding installation that paster piezoresistor set up also not influence in the protective housing.

Furthermore, the thermal fuse mechanism comprises a first metal terminal, a thermal fuse and an insulating spring, wherein one end of the thermal fuse is welded on the first electrode, the other end of the thermal fuse is connected with the first metal terminal, one end of the insulating spring is fixedly connected with the sealing plate, the other end of the insulating spring is fixedly connected with the first metal terminal, and the other end of the first metal terminal penetrates out of the first through hole.

Adopt above-mentioned technical scheme's effect to be, when mains voltage exceeded paster piezo-resistor's operating voltage, paster piezo-resistor can produce the high fever rapidly, and the hot melt fuse fusing at this moment cuts off the power, makes paster piezo-resistor temperature descend rapidly to prevent the firing or the explosion of paster piezo-resistor.

Further, after the thermal fuse is welded with the first electrode, the insulating spring is in a stretching state and used for enabling the thermal fuse to have a tendency of moving away from the first electrode.

The effect of adopting above-mentioned technical scheme does, makes the hot melt fuse separate with paster piezoresistor rapidly after fusing through insulating spring, avoids appearing the condition that the hot melt fuse that fuses continues to be attached on paster piezoresistor, guarantees that paster piezoresistor's power in time cuts off.

Further, the melting point of the thermal fuse is less than 200 ℃.

The effect of adopting above-mentioned technical scheme does, can be fast with the fuse fusing behind the assurance paster piezoresistor high temperature.

Further, the protective shell is made of an insulating material.

The effect of adopting above-mentioned technical scheme does, guarantees that protective housing can not cause the influence to paster piezoresistor.

The utility model has the advantages that:

1. the patch piezoresistor has overhigh temperature and possible explosion risk, and fragments of the patch piezoresistor cannot splash to contact other elements through the protective shell, so that the circuit damage condition is prevented.

2. Through outside or inside rotation bolt, drive the movable plate and keep away from paster piezoresistor or be close to paster piezoresistor removal for two relative rubber pads that set up fix paster piezoresistor in the protective housing, avoid paster piezoresistor and protective housing frequent collision to cause paster piezoresistor's damage, make piezoresistor's fixed simpler simultaneously, have the advantage of being convenient for installation and dismantlement.

3. When the power voltage exceeds the working voltage of the chip piezoresistor, the chip piezoresistor can generate high heat rapidly, the thermal fuse is fused at the moment, the power supply is cut off, and the temperature of the chip piezoresistor is rapidly reduced, so that the chip piezoresistor is prevented from being ignited or exploded, and the chip piezoresistor is protected from being damaged.

Drawings

Fig. 1 is a schematic view of the overall structure of a chip varistor of the present invention;

fig. 2 is a schematic diagram of an internal structure of a chip varistor according to the present invention;

fig. 3 is a perspective view of a sealing plate of the chip varistor of the present invention;

the chip varistor comprises a chip varistor 1, a chip varistor 2, a protective shell 3, a sealing plate 4, a connecting groove 5, a strip-shaped connecting piece 6, a rubber pad 7, a moving plate 8, a bolt 9, a first electrode 10, a second electrode 11, a second metal terminal 12, a first metal terminal 13, a thermal fuse 14 and an insulating spring.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes will be apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all inventions contemplated by the present invention are protected.

As shown in fig. 1 to 3, a chip varistor includes a chip varistor 1, a protective casing 2 and a sealing plate 3, wherein the chip varistor 1 is disposed in the protective casing 2, a mounting opening is disposed at the top of the protective casing 2, and the sealing plate 3 is disposed at the mounting opening of the protective casing 2; the chip piezoresistor 1 is installed in the protective shell 2 when the temperature of the chip piezoresistor is too high and the risk of explosion possibly exists, then the installation opening of the protective shell 2 is sealed through the sealing plate 3, fragments of the chip piezoresistor 1 cannot splash to be contacted with other elements through the protective shell 2, the circuit damage condition is prevented, the protective shell 2 is made of insulating materials, and the protective shell 2 cannot influence the chip piezoresistor 1; referring to fig. 1, two connecting grooves 4 are symmetrically formed in the top of a protective shell 2, the two connecting grooves 4 are distributed on two sides of an installation opening, one end of each connecting groove 4 penetrates through the protective shell 2, namely one end of each connecting groove 4 is opened, referring to fig. 3, two strip-shaped connecting pieces 5 are symmetrically fixed on a sealing plate 3, the cross sections of the connecting grooves 4 and the strip-shaped connecting pieces 5 are in inverted T shapes, the two connecting grooves 4 are respectively matched with the two strip-shaped connecting pieces 5, so that the strip-shaped connecting pieces 5 can slide into the connecting grooves 4 from the opening ends of the connecting grooves 4, connection between the protective shell 2 and the sealing plate 3 is completed, and the connecting mode is simple and rapid and convenient to disassemble; when specifically implementing, two sides set up rubber packing pad about spread groove 4, rubber packing pad is close to spread groove 4 open end and is equipped with leading-in inclined plane, make bar connection spare 5 through leading-in inclined plane can slide to rubber packing pad fast, then continue to slide in bar connection spare 5, make 5 compression rubber packing pads of bar connection spare and spread groove 4 transition fit, thereby improve

protective housing

2 and 3 joint strength of shrouding, avoid 1 explosion of paster piezoresistor to explode shrouding 3 from protective housing 2, lead to the piece of paster piezoresistor 1 to splash and influence other circuit elements.

Further, referring to fig. 2, two symmetrical inner walls of the protection housing 2 are provided with pressing mechanisms, the two pressing mechanisms are used for fixing the chip piezoresistor 1 in the protection housing 2, and the chip piezoresistor 1 and the sealing plate 3 are arranged at intervals, so that a thermal fuse mechanism installation space is reserved between the chip piezoresistor 1 and the sealing plate 3, each pressing mechanism comprises a rubber pad 6 and a moving plate 7, the moving plate 7 can move close to the chip piezoresistor 1, the rubber pad 6 is fixed on the end face of the moving plate 7 close to the chip piezoresistor 1, the pressing mechanisms further comprise bolts 8, the bolts 8 are in threaded connection with the protection housing 2, the bolts 8 penetrate through the protection housing 2 and are fixedly connected with the moving plate 7, and the chip piezoresistor 1 is located on a moving path of the bolts 8. Through outside or inside swivel bolt 8, drive movable plate 7 and keep away from paster piezoresistor 1 or be close to paster piezoresistor 1 and remove for two relative rubber pads 6 that set up fix paster piezoresistor 1 in protective housing 2, avoid paster piezoresistor 1 and protective housing 2 frequent collision to cause the damage of paster piezoresistor 1, make piezoresistor 1's fixed simpler simultaneously, have the advantage of being convenient for installation and dismantlement.

Further, as shown in fig. 2, a first electrode 9 is disposed at the top of the chip varistor 1, the first electrode 9 is connected with a thermal fuse mechanism, a first through hole for the thermal fuse mechanism to pass through is formed in the sealing plate 3, a second electrode 10 is disposed at the bottom of the chip varistor 1, the second electrode 10 is connected with a second metal terminal 11, a second through hole for the second metal terminal 11 to pass through is formed in the bottom of the protective casing 2, the thermal fuse mechanism includes a first metal terminal 12, a thermal fuse 13 and an insulating spring 14, one end of the thermal fuse 13 is welded on the first electrode 9, the other end of the thermal fuse is connected with the first metal terminal 12, one end of the insulating spring 14 is fixedly connected with the sealing plate 3, the other end of the insulating spring is fixedly connected with the first metal terminal 12, and the other end of the first metal terminal 12 penetrates out of the first through hole. The chip piezoresistor 1 is welded on the circuit board through the first metal terminal 12 and the second metal terminal 11, so that the chip piezoresistor 1 is arranged in the protective shell 2 without influencing the welding installation of the chip piezoresistor 1; when the power voltage exceeds the working voltage of the chip piezoresistor 1, the chip piezoresistor 1 can quickly generate high heat, the thermal fuse 13 is fused at the moment, the power supply is cut off, and the temperature of the chip piezoresistor 1 is quickly reduced, so that the chip piezoresistor 1 is prevented from being ignited or exploded, and the chip piezoresistor 1 is protected from being damaged; in summary, the present application has a dual protection mechanism, the thermal fuse mechanism is a first heavy protection mechanism, the thermal fuse mechanism can cut off the power supply of the chip varistor 1 at high temperature and high pressure, the chip varistor 1 is protected from thermal damage or thermal explosion, the service life of the chip varistor 1 is prolonged, the protective housing 2 is a second heavy protection mechanism, the protective housing plays a role in protecting the chip varistor 1 after the thermal fuse mechanism fails or is accidentally turned on after the thermal fuse mechanism is fused, it is ensured that the explosive fragments of the varistor 1 cannot splash to contact with other elements to cause circuit damage, and the use safety of the chip varistor 1 is further improved.

Further, after the thermal fuse 13 is welded to the first electrode 9, the insulating spring 14 is in a stretched state for giving the thermal fuse 13 a tendency to move away from the first electrode 9. Make behind the thermal fuse 13 fusing rapidly separate with paster piezoresistor 1 through insulating spring 14, avoid appearing the condition that the thermal fuse 13 of fusing continues to be attached on paster piezoresistor 1, guarantee that paster piezoresistor 1's power in time cuts off.

And (4) optional. The melting point of the thermal fuse 13 is less than 200 ℃. The thermal fuse 13 can be quickly fused after the chip piezoresistor 1 is heated to a high temperature.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may include only a single embodiment, and such description is for clarity only, and those skilled in the art will be able to make the description as a whole, and the embodiments may be suitably combined to form other embodiments as will be apparent to those skilled in the art.

Claims

1. A patch type piezoresistor is characterized by comprising a patch piezoresistor (1), a protective shell (2) and a sealing plate (3), wherein the patch piezoresistor (1) is arranged in the protective shell (2), the top of the protective shell (2) is provided with a mounting opening, and the sealing plate (3) is arranged at the mounting opening of the protective shell (2);

two spread grooves (4) have been seted up to the top symmetry of protective housing (2), two spread groove (4) distribute in installation open-ended both sides, protective housing (2) are passed to the one end of spread groove (4), the symmetry is fixed with two bar connecting piece (5) on shrouding (3), spread groove (4) are "T" type, two with the cross sectional shape of bar connecting piece (5) fall spread groove (4) respectively with two bar connecting piece (5) adaptation.

2. A chip varistor according to claim 1, characterized in that two symmetrical inner walls of the protective casing (2) are provided with hold-down means for fixing the chip varistor (1) in the protective casing (2) and spacing the chip varistor (1) from the sealing plate (3).

3. A chip type varistor according to claim 2, wherein said pressing mechanism comprises a rubber pad (6) and a moving plate (7), said moving plate (7) is movable close to said chip varistor (1), and said rubber pad (6) is fixed to the end surface of said moving plate (7) close to said chip varistor (1).

4. A chip varistor according to claim 3, characterized in that said pressing mechanism further comprises a bolt (8), said bolt (8) is in threaded connection with said protective casing (2), said bolt (8) passes through the protective casing (2) and is fixedly connected with said moving plate (7), and said chip varistor (1) is located on the moving path of said bolt (8).

5. A chip type varistor according to claim 1, wherein a first electrode (9) is disposed on the top of the chip varistor (1), the first electrode (9) is connected to a thermal fuse, the sealing plate (3) has a first through hole for passing the thermal fuse, a second electrode (10) is disposed on the bottom of the chip varistor (1), the second electrode (10) is connected to a second metal terminal (11), and a second through hole for passing the second metal terminal (11) is disposed on the bottom of the protection casing (2).

6. A patch type varistor according to claim 5, characterized in that said thermal fuse comprises a first metal terminal (12), a thermal fuse (13) and an insulating spring (14), one end of said thermal fuse (13) is welded to said first electrode (9), the other end is connected to said first metal terminal (12), one end of said insulating spring (14) is fixedly connected to said sealing plate (3), the other end is fixedly connected to said first metal terminal (12), and the other end of said first metal terminal (12) protrudes through said first through hole.

7. A patch type varistor according to claim 6, characterized in that said insulating spring (14) is under tension after said thermal fuse (13) has been welded to the first electrode (9) for giving said thermal fuse (13) a tendency to move away from the first electrode (9).

8. A patch type varistor according to claim 7, characterized in that said thermal fuse (13) has a melting point of less than 200 ℃.

9. A chip varistor according to any of claims 1-8, characterized in that said protective casing (2) is made of an insulating material.