CN210167190U

CN210167190U - Safety type piezoresistor

Info

Publication number: CN210167190U
Application number: CN201921304902.9U
Authority: CN
Inventors: 戎建欣; 山崎奈央; 陆永彬; 王万喜; 徐干义; 全桂兰; 陈润
Original assignee: Jiangsu Is Emerging Along Electronics Co Ltd
Current assignee: Jiangsu Is Emerging Along Electronics Co Ltd
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2020-03-20
Anticipated expiration: 2029-08-13

Abstract

The utility model discloses a safety piezoresistor, which comprises an explosion-proof shell, wherein the inner bottom wall of the explosion-proof shell is fixedly connected with a damping sheet, the upper surface of the damping sheet is fixedly connected with a supporting seat, the upper surface of the supporting seat is fixedly connected with symmetrical first springs, the upper surface of the supporting seat is fixedly connected with a supporting column, a sliding plate is arranged above the supporting seat, the top end of each first spring is fixedly connected with the bottom surface of the sliding plate, the inner side wall of the explosion-proof shell is provided with symmetrical first chutes, the inside of each first chute is fixedly connected with a first slide block matched with the first chutes, the impact force at the moment of the breakdown of the piezoresistor can be further buffered through the matching of the damping sheet, the supporting seat, the first spring, the sliding plate, the first chutes and a second slide block, the impact force at the moment of the breakdown is reduced, the accidental injury is avoided, and, the safety of use is improved.

Description

Safety type piezoresistor

Technical Field

The utility model relates to a piezoresistor technical field specifically is a safe type piezoresistor.

Background

The voltage-sensitive resistor is a voltage-limiting element which is sensitive to voltage change, and is characterized by that under the defined temp., when the voltage exceeds a certain critical value, its resistance value can be sharply reduced, and the current passed through it can be sharply increased, and the voltage and current are not in linear relationship, so that the voltage-sensitive resistor also can be called non-linear rheostat, and the voltage-sensitive resistor is a short-name voltage-sensitive resistor, and is a non-linear resistor element, and its resistance value is related to the voltage applied by two ends, and when the voltage applied to the voltage-sensitive resistor is within its nominal value, the resistance value of the resistor can be in infinite state, and almost no current can be passed through, when the voltage of two ends of the voltage-sensitive resistor is slightly greater than nominal voltage, the voltage-sensitive resistor can be quickly broken down and turned on, and the resistor can be in conduction state, and when the voltage is reduced below the nominal voltage, its resistance value, the piezoresistor is restored to a high-resistance state, when the voltage at two ends of the piezoresistor exceeds the maximum limit voltage of the piezoresistor, the piezoresistor is completely broken down and damaged and cannot be restored automatically, and at the moment of breaking down, the piezoresistor has great energy and potential safety hazards.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a safe type varistor 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 safety piezoresistor comprises an explosion-proof shell, wherein a damping sheet is fixedly connected to the inner bottom wall of the explosion-proof shell, a supporting seat is fixedly connected to the upper surface of the damping sheet, symmetrical first springs are fixedly connected to the upper surface of the supporting seat, a supporting column is fixedly connected to the upper surface of the supporting seat, a sliding plate is arranged above the supporting seat, the top end of each first spring is fixedly connected with the bottom surface of the sliding plate, symmetrical first sliding grooves are formed in the inner side wall of the explosion-proof shell, first sliding blocks matched with the first sliding grooves are fixedly connected to the inner parts of the first sliding grooves, the left side surface and the right side surface of the sliding plate are respectively fixedly connected with one side surface, close to each other, of the two first sliding blocks, symmetrical first through holes are formed in the upper surface of the sliding plate, and symmetrical second springs are fixedly connected to the upper surface of the sliding, the sliding plate is provided with a support plate, the left side surface and the right side surface of the support plate are fixedly connected with sliding rings, and the top end of each second spring is fixedly connected with the bottom surface of the support plate.

The upper surface of the supporting plate is fixedly connected with a piezoresistor, the upper surface of the piezoresistor is electrically connected with a first leading-out electrode, the upper surface of the piezoresistor is electrically connected with a second leading-out electrode, the left side and the right side of the piezoresistor are respectively provided with a fixed plate, one side surface of each fixed plate, which is close to each other, is contacted with the outer surface of the piezoresistor, the inner side wall of the explosion-proof shell is fixedly connected with symmetrical hollow sleeves, the inner wall of each hollow sleeve is provided with symmetrical second sliding grooves, the inside of each second sliding groove is fixedly connected with second sliding blocks matched with the second sliding grooves, slide bars are arranged inside each hollow sleeve, the top end of each slide bar and the bottom end of each slide bar are respectively fixedly connected with one side surface of each two groups of second sliding blocks, one side surface of each slide bar, which is far away from each other, is, two the one end that the third spring kept away from each other all with hollow sheathed tube inner wall fixed connection, two the equal fixedly connected with connecting rod in a side that the slide bar is close to each other, two a side that the connecting rod is close to each other respectively with a side fixed connection that two fixed plates kept away from each other.

Preferably, the upper surface of the explosion-proof shell and the bottom surface of the explosion-proof shell are fixedly connected with symmetrical fixed blocks, and the front surface of each fixed block is provided with a fixed hole.

Preferably, symmetrical radiating ports are formed in the left side surface and the right side surface of the explosion-proof shell, and radiating boxes are fixedly connected to the left side surface and the right side surface of the explosion-proof shell.

Preferably, the inner wall fixedly connected with air exhauster of heat dissipation case, the inner wall fixedly connected with dust screen of heat dissipation case, the left surface fixedly connected with heat dissipation bars of heat dissipation case.

Preferably, symmetrical rubber rings are fixedly embedded on the upper surface of the explosion-proof shell, and the top end of the first lead-out electrode and the top end of the second lead-out electrode sequentially penetrate through the explosion-proof shell and the rubber rings and extend to the upper side of the explosion-proof shell.

Preferably, each support column penetrates through the first spring, the first through hole and the sliding ring in sequence and extends to the upper portion of the sliding ring, and the top end of each support column is fixedly connected with a limiting cap.

Preferably, two the equal fixedly connected with connecting rod in the side that the slide bar is close to each other, two a side that the connecting rod is close to each other is respectively with the side fixed connection that two fixed plates kept away from each other.

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

1. the utility model discloses a set up the fixed orifices on the fixed block, the piezoresistor of being convenient for is fixed, sets up heat dissipation case and thermovent through both sides, has guaranteed the inside heat dissipation of piezoresistor, has improved the radiating effect of device, avoids the high temperature, damages resistance, is convenient for piezoresistor through first extraction electrode and second extraction electrode and is connected with the circuit board, has improved the portability of device installation, through explosion-proof shell's setting, has guaranteed the security of device.

2. The utility model discloses a sliding ring, a supporting plate, the second spring, the sliding plate, the fixed plate, hollow sleeve, the connecting rod, the second spout, the second slider, the cooperation of slide bar and third spring, can play the effect fixed to piezo-resistor, can cushion again and puncture the cushion effect of in the twinkling of an eye production at piezo-resistor, through the shock attenuation piece, a supporting seat, first spring, the sliding plate, the cooperation of first spout and second slider, can further puncture transient impact force to piezo-resistor and cushion, reduced puncture transient impact force, the potential safety hazard is reduced, the security of use has been improved.

3. The utility model discloses a top that every support column all runs through first spring, first through-hole and sliding ring in proper order and extend to the sliding ring, the equal fixedly connected with in top of every support column is spacing cap, prevents that the sliding ring from breaking away from the support column, has guaranteed the security of using.

Drawings

Fig. 1 is a sectional view of the front view of the explosion-proof housing of the present invention;

FIG. 2 is a cross-sectional view of the front view of the heat dissipation case of the present invention;

fig. 3 is an enlarged schematic view of a structure shown in fig. 1 according to the present invention.

In the figure: 1 explosion-proof shell, 2 supporting seat, 3 first spring, 4 first through hole, 5 support columns, 6 slip rings, 7 spacing cap, 8 fixed plate, 9 piezoresistor, 10 heat dissipation port, 11 first leading-out electrode, 12 fixed block, 13 rubber ring, 14 second leading-out electrode, 15 heat dissipation box, 16 supporting plate, 17 second spring, 18 sliding plate, 19 first slider, 20 second slider, 21 first chute, 22 damping sheet, 23 fixed hole, 24 dust screen, 25 exhaust fan, 26 heat dissipation grid, 27 third spring, 28 second chute, 29 sliding rod, 30 connecting rod, 31 hollow sleeve.

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 technical scheme in the utility model, all other embodiments that ordinary skilled person in the art obtained under the prerequisite of not making the creative work all belong to the scope of the utility model protection.

Referring to fig. 1 to 3, the present invention provides a technical solution: a safety type piezoresistor comprises an explosion-proof shell 1, wherein a damping sheet 22 is fixedly connected to the inner bottom wall of the explosion-proof shell 1, a supporting seat 2 is fixedly connected to the upper surface of the damping sheet 22, symmetrical first springs 3 are fixedly connected to the upper surface of the supporting seat 2, a supporting column 5 is fixedly connected to the upper surface of the supporting seat 2, a sliding plate 18 is arranged above the supporting seat 2, the top end of each first spring 3 is fixedly connected with the bottom surface of the sliding plate 18, symmetrical first sliding grooves 21 are formed in the inner side wall of the explosion-proof shell 1, first sliding blocks 19 matched with the first sliding grooves 21 are fixedly connected to the inner part of each first sliding groove 21, the left side surface and the right side surface of the sliding plate 18 are fixedly connected with one side surface, close to each other, of the two first sliding blocks 19, symmetrical first through holes 4 are formed in the upper surface of the sliding plate 18, and symmetrical second springs 17, a support plate 16 is arranged above the sliding plate 18, the sliding rings 6 are fixedly connected to the left side surface and the right side surface of the support plate 16, and the top end of each second spring 17 is fixedly connected with the bottom surface of the support plate 16.

The upper surface of the support plate 16 is fixedly connected with a piezoresistor 9, the upper surface of the piezoresistor 9 is electrically connected with a first leading-out electrode 11, the upper surface of the piezoresistor 9 is electrically connected with a second leading-out electrode 14, the left side and the right side of the piezoresistor 9 are respectively provided with a fixing plate 8, one side surface, close to each other, of the two fixing plates 8 is contacted with the outer surface of the piezoresistor 9, the inner side wall of the explosion-proof shell 1 is fixedly connected with symmetrical hollow sleeves 31, the inner wall of each hollow sleeve 31 is provided with symmetrical second sliding grooves 28, the inside of each second sliding groove 28 is fixedly connected with second sliding blocks 20 matched with the second sliding grooves 28, the inside of each hollow sleeve 31 is provided with sliding rods 29, the top end of each sliding rod 29 and the bottom end of the sliding rod 29 are respectively fixedly connected with one side surface, close to each other, of the two sliding rods 29 are respectively fixedly connected with, the ends of the two third springs 27 far away from each other are fixedly connected with the inner wall of the hollow sleeve 31, the side faces of the two slide bars 29 close to each other are fixedly connected with connecting rods 30, and the side faces of the two connecting rods 30 close to each other are fixedly connected with the side faces of the two fixing plates 8 far away from each other.

Further, the upper surface of the explosion-proof housing 1 and the bottom surface of the explosion-proof housing 1 are fixedly connected with symmetrical fixing blocks 12, and the fixing holes 23 are formed in the front surface of each fixing block 12, so that the device can be effectively fixed, and the stability of the device is guaranteed.

Furthermore, symmetrical radiating ports 10 are formed in the left side surface and the right side surface of the explosion-proof shell 1, and radiating boxes 15 are fixedly connected to the left side surface and the right side surface of the explosion-proof shell 1, so that the radiating effect of the device can be effectively realized, and the damage to elements caused by overlarge heat in the explosion-proof shell 1 is avoided.

Further, the inner wall fixedly connected with air exhauster 25 of heat dissipation case 15, the inner wall fixedly connected with dust screen 24 of heat dissipation case 15, the left surface fixedly connected with heat dissipation bars 26 of heat dissipation case 15 avoid dust to block up thermovent 10, guarantee heat dissipation case 15's normal work.

Further, the upper surface of the explosion-proof housing 1 is fixedly inlaid with symmetrical rubber rings 13, the top end of the first leading-out electrode 11 and the top end of the second leading-out electrode 14 sequentially penetrate through the explosion-proof housing 1 and the rubber rings 13 and extend to the upper side of the explosion-proof housing 1, connection between the device and an external electronic element can be effectively achieved, and use convenience is improved.

Further, every support column 5 all runs through first spring 3, first through-hole 4 and sliding ring 6 in proper order and extends to sliding ring 6's top, and the equal fixedly connected with stop cap 7 in top of every support column 5 prevents that sliding ring 6 from breaking away from support column 5, has guaranteed the security of using.

Furthermore, a connecting rod 30 is fixedly connected to one side face, close to each other, of the two sliding rods 29, and one side face, close to each other, of the two connecting rods 30 is fixedly connected to one side face, far away from each other, of the two fixing plates 8, so that impact force can be further reduced, and potential safety hazards are reduced.

The working principle is as follows: the anti-explosion device is characterized in that the anti-explosion device is connected with a circuit board through a first leading-out electrode 11 and a second leading-out electrode 14, the anti-explosion device is reinforced and fixed through a fixing hole 23 in a fixing block 12, then an exhaust fan 25 is connected with a power supply, heat in the anti-explosion shell 1 is sucked out through the exhaust fan 25 and a heat dissipation port 10, when a piezoresistor 9 is broken down, impact force pushes a support plate 16 to drive two sliding rings 6 to slide on a support column 5, the support column 5 compresses a second buffer spring 17, a sliding plate 18 slides to compress a first spring 3, meanwhile, a fixing plate 8 pushes a sliding rod 29 to compress a third spring 27, and the impact force is reduced by utilizing the.

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 safety varistor, comprising an explosion-proof casing (1), characterized in that: the inner bottom wall of the explosion-proof shell (1) is fixedly connected with a damping sheet (22), the upper surface of the damping sheet (22) is fixedly connected with a support seat (2), the upper surface of the support seat (2) is fixedly connected with symmetrical first springs (3), the upper surface of the support seat (2) is fixedly connected with a support column (5), a sliding plate (18) is arranged above the support seat (2), the top end of each first spring (3) is fixedly connected with the bottom surface of the sliding plate (18), the inner side wall of the explosion-proof shell (1) is provided with symmetrical first sliding chutes (21), the inside of each first sliding chute (21) is fixedly connected with first sliding blocks (19) matched with the first sliding chutes (21), and the left side surface and the right side surface of the sliding plate (18) are fixedly connected with one side surface of the two first sliding blocks (19) close to each other respectively, the upper surface of the sliding plate (18) is provided with symmetrical first through holes (4), the upper surface of the sliding plate (18) is fixedly connected with symmetrical second springs (17), a supporting plate (16) is arranged above the sliding plate (18), the left side surface and the right side surface of the supporting plate (16) are fixedly connected with sliding rings (6), and the top end of each second spring (17) is fixedly connected with the bottom surface of the supporting plate (16);

the upper surface of the supporting plate (16) is fixedly connected with a piezoresistor (9), the upper surface of the piezoresistor (9) is electrically connected with a first leading-out electrode (11), the upper surface of the piezoresistor (9) is electrically connected with a second leading-out electrode (14), the left side and the right side of the piezoresistor (9) are respectively provided with a fixing plate (8), one side surfaces of the two fixing plates (8) which are close to each other are respectively contacted with the outer surface of the piezoresistor (9), the inner side wall of the explosion-proof shell (1) is fixedly connected with symmetrical hollow sleeves (31), the inner wall of each hollow sleeve (31) is respectively provided with a symmetrical second sliding chute (28), the inside of each second sliding chute (28) is respectively and fixedly connected with a second sliding block (20) matched with the second sliding chute (28), and the inside of each hollow sleeve (31) is respectively provided with a sliding rod (29), every the top of slide bar (29) and the bottom of slide bar (29) respectively with two sets of a side fixed connection that second slider (20) are close to each other, two a side equal fixedly connected with third spring (27) that slide bar (29) kept away from each other, two the one end that third spring (27) kept away from each other all with the inner wall fixed connection of hollow sleeve pipe (31).

2. A safety varistor according to claim 1, wherein: the upper surface of the explosion-proof shell (1) and the bottom surface of the explosion-proof shell (1) are fixedly connected with symmetrical fixing blocks (12), and the front surface of each fixing block (12) is provided with a fixing hole (23).

3. A safety varistor according to claim 1, wherein: symmetrical radiating ports (10) are formed in the left side surface and the right side surface of the explosion-proof shell (1), and radiating boxes (15) are fixedly connected to the left side surface and the right side surface of the explosion-proof shell (1).

4. A safety varistor according to claim 3, wherein: the inner wall fixedly connected with air exhauster (25) of heat dissipation case (15), the inner wall fixedly connected with dust screen (24) of heat dissipation case (15), the left surface fixedly connected with heat dissipation bars (26) of heat dissipation case (15).

5. A safety varistor according to claim 1, wherein: the upper surface of the explosion-proof shell (1) is fixedly inlaid with symmetrical rubber rings (13), and the top end of the first lead-out electrode (11) and the top end of the second lead-out electrode (14) sequentially penetrate through the explosion-proof shell (1) and the rubber rings (13) and extend to the upper side of the explosion-proof shell (1).

6. A safety varistor according to claim 1, wherein: every support column (5) all runs through first spring (3), first through-hole (4) and sliding ring (6) in proper order and extend to the top of sliding ring (6), every the equal fixedly connected with of top of support column (5) is spacing cap (7).

7. A safety varistor according to claim 1, wherein: two a side that slide bar (29) are close to each other all fixedly connected with connecting rod (30), two a side that connecting rod (30) are close to each other respectively with two fixed plates (8) a side fixed connection of keeping away from each other.