阅读说明：本技术 一种高效热保护型压敏电阻器 (High-efficient thermal protection type piezoresistor ) 是由 侯巧莉 于 2020-11-27 设计创作，主要内容包括：本发明公开了一种高效热保护型压敏电阻器,其结构包括保护罩、连接头、压敏电阻装置,保护罩外侧与连接头外侧嵌固连接,压敏电阻装置与保护罩内部焊接连接,吸温装置将导线中的热量进行吸收推动清理器进行摆动,膨撑板受热膨胀将板护壳推动摆动,清理条被板护壳带动上下移动使得切断条对熔丝不断的切割,加快了熔丝断开的速度,防止熔丝粘附在线路上,竖板对压敏电阻片表面进行摩擦时会带动接触块进行上下的移动,同时通过弹板对清除板进行顶压,加大对压敏电阻片表面的压力,弹簧柱推出清除块对压敏电阻片侧面进行刮除,防止融化的熔丝在压敏电阻片表面形成通路终止压敏电阻片的工作,提高了压敏电阻片的工作稳定性。(The invention discloses a high-efficiency thermal protection type piezoresistor, which structurally comprises a protective cover, a connector and a piezoresistor device, wherein the outer side of the protective cover is fixedly connected with the outer side of the connector in an embedded manner, the piezoresistor device is connected with the inner part of the protective cover in a welding manner, a temperature absorption device absorbs heat in a lead to push a cleaner to swing, an expansion plate expands when heated to push a plate protective shell to swing, a cleaning strip is driven by the plate protective shell to move up and down so that a cutting strip can continuously cut a fuse wire, the speed of breaking the fuse wire is increased, the fuse wire is prevented from being adhered to a line, a contact block can be driven to move up and down when a vertical plate rubs the surface of a piezoresistor sheet, meanwhile, an elastic plate is used for jacking the cleaning plate to increase the pressure on the surface of the piezoresistor sheet, a spring column is pushed out by the cleaning block to scrape the side face of the piezoresistor sheet, the working stability of the pressure sensitive resistance sheet is improved.)

1. The utility model provides a high-efficient thermal protection type piezoresistor, its structure includes safety cover (1), connector (2), piezo-resistor device (3), the safety cover (1) outside is connected with connector (2) outside embedded solid, piezo-resistor device (3) and safety cover (1) inside weld are connected, its characterized in that:

piezoresistor device (3) include bottom plate (31), definite value ohmic resistance (32), pilot lamp (33), from clearing device (34), bottom plate (31) outside is connected with safety cover (1) lower extreme inboard embedded solid, definite value ohmic resistance (32) lower extreme and bottom plate (31) upside welded connection, pilot lamp (33) lower extreme and bottom plate (31) middle part embedded solid are connected, laminate mutually with bottom plate (31) upside from clearing device (34) downside.

2. A highly efficient thermal protection type varistor according to claim 1, characterized in that: the self-cleaning device (34) comprises a connecting wire (341), a fixing cover (342), a temperature absorbing device (343), a cleaner (344) and a piezoresistor disc (345), wherein the lower end of the connecting wire (341) is connected with the upper side of the bottom plate (31) in a welding mode, the inner side of the lower end of the fixing cover (342) is attached to the lower side of the temperature absorbing device (343), the outer side of the temperature absorbing device (343) is fixedly connected with the upper end of the connecting wire (341) in an embedded mode, the cleaner (344) is in clearance fit with the upper end of the piezoresistor disc (345), and the lower end of the piezoresistor disc (345) is connected with the upper end of the connecting wire (341.

3. A high efficiency thermal protection type varistor according to claim 2, wherein: the heat absorption device (343) comprises a heat absorption plate (43a), a heat collection pipe (43b), an expansion support plate (43c) and a connection block (43d), the lower end of the heat absorption plate (43a) is in interference fit with the outer side of the connection wire (341), the heat collection pipe (43b) is fixedly embedded in the upper end of the heat absorption plate (43a), the expansion support plate (43c) is in welded connection with the outer side of the connection block (43d), and the middle of the connection block (43d) is fixedly embedded in the outer side of the heat collection pipe (43 b).

4. A high efficiency thermal protection type varistor according to claim 2, wherein: clearance ware (344) are including connecting rod (44a), board protective case (44b), clearance strip (44c), cut off strip (44d), connecting rod (44a) lower extreme connecting block (43d) upside is laminated mutually, board protective case (44b) and fixed cover (342) upper end outside clearance fit, clearance strip (44c) upper end and fixed cover (342) inner shaft are connected, cut off strip (44d) and clearance strip (44c) outside welded connection.

5. A highly efficient thermal protection type varistor according to claim 4, wherein: the cleaning strip (44c) comprises a vertical plate (c1) and a contact block (c2), the upper end of the vertical plate (c1) is connected with the inner shaft of the plate protective shell (44b), and the left side of the contact block (c2) is attached to the right side of the vertical plate (c 1).

6. A highly efficient thermal protection type varistor according to claim 5, wherein: contact piece (c2) including bullet board (c21), clear away board (c22), spring post (c23), clear away piece (c24), activity clearance structure (c25), bullet board (c21) left side and riser (c1) lower extreme right side welded connection, it inlays admittedly with bullet board (c21) right side and is connected to clear away board (c22) left side, spring post (c23) and clear away board (c22) right side and inlay admittedly and be connected, it laminates mutually with spring post (c23) outside to clear away piece (c24), activity clearance structure (c25) left side is laminated mutually with bullet board (c21) right side.

7. A highly efficient thermal protection type varistor according to claim 6, wherein: activity clearance structure (c25) is including fixed plate body (e1), fixed block (e2), scraping head (e3), fixed plate body (e1) and diving board (c21) right side welded connection, fixed block (e2) and fixed plate body (e1) right side activity block, scrape head (e3) and fixed plate body (e1) right side and laminate mutually, scrape head (e3) and laminate mutually with fixed block body (e2) downside.

Technical Field

The invention belongs to the field of resistors, and particularly relates to an efficient thermal protection type piezoresistor.

Background

The piezoresistor is mainly used for overvoltage protection, high-voltage arc extinction, dryness elimination and semiconductor device protection in an electronic product, the voltage of an electronic element receiving power supply is controlled through the voltage clamping characteristic of a zinc oxide material in the overvoltage protection process, the piezoresistor can generate a large amount of heat in the voltage clamping process, the electronic product can be prevented from being burnt by an arc breakdown resistance protective film generated by the overheated piezoresistor through the series thermal coupling fuse, however, as the fuse is still in a conductive state in the heating process, when the connection point of the fuse is too long in the production process, the fuse can be suspended between circuits, the temperature of the piezoresistor can be continuously increased to damage the electronic element, and meanwhile, the fuse drips to wrap the outer side of the piezoresistor to form a new passage to lead current to cross the piezoresistor, the upper varistor loses its working capacity.

Disclosure of Invention

The invention provides a high-efficiency thermal protection type piezoresistor, aiming at solving the problems that in the production process of the fuse wire, the connection point is too long, the fuse wire can be suspended between lines, the temperature of a piezoresistor is continuously increased to cause damage to electronic elements, and meanwhile, the fuse wire is wrapped outside the piezoresistor after dripping to form a new path outside the resistor, so that current passes through the piezoresistor, and the piezoresistor at the upper end loses working capacity.

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a high-efficient thermal protection type piezoresistor, its structure includes safety cover, connector, piezo-resistor device, the safety cover outside is inlayed fixedly with the connector outside and is connected, piezo-resistor device and the inside welded connection of safety cover, the piezo-resistor device includes bottom plate, definite value ohmic resistance, pilot lamp, from the clearing device, the bottom plate outside is inlayed fixedly with safety cover lower extreme inboard and is connected, definite value ohmic resistance lower extreme and bottom plate upside welded connection, the pilot lamp lower extreme is inlayed fixedly with the bottom plate middle part and is connected, laminate mutually with the bottom plate upside from the clearing device downside.

As a further improvement of the invention, the self-cleaning device comprises a wiring, a fixed cover, a temperature absorbing device, a cleaner and a piezoresistor sheet, wherein the lower end of the wiring is connected with the upper side of the bottom plate in a welding manner, the inner side of the lower end of the fixed cover is attached to the lower side of the temperature absorbing device, the outer side of the temperature absorbing device is fixedly embedded with the upper end of the wiring, the cleaner is in clearance fit with the upper end of the piezoresistor sheet, the lower end of the piezoresistor sheet is connected with the upper end of the wiring in a welding manner, and the number of the temperature absorbing devices is two and the piezoresistor sheet is distributed in a bilateral symmetry manner by.

As a further improvement of the invention, the temperature absorbing device comprises a heat absorbing plate, heat collecting tubes, expansion supporting plates and connecting blocks, wherein the lower end of the heat absorbing plate is in interference fit with the outer side of the connecting wire, the heat collecting tubes are fixedly embedded and connected with the inner part of the upper end of the heat absorbing plate, the expansion supporting plates are welded and connected with the outer side of the connecting blocks, the middle parts of the connecting blocks are fixedly embedded and connected with the outer sides of the heat collecting tubes, the expansion supporting plates are arched and made of carbon spring steel, the expansion supporting plates have the characteristic of high thermal expansion coefficient, and the two expansion supporting plates are arranged in.

As a further improvement of the invention, the cleaner comprises a connecting rod, a plate protective shell, cleaning strips and cutting strips, wherein the upper side of a connecting block at the lower end of the connecting rod is attached, the plate protective shell is in clearance fit with the outer side of the upper end of a fixed cover, the upper end of each cleaning strip is connected with an inner shaft of the fixed cover, the cutting strips are welded and connected with the outer sides of the cleaning strips, the number of the cleaning strips is two, the cleaning strips are distributed in a left-right symmetrical mode by taking the cutting strips as centers, and the lower ends of the cutting strips are sharp and are installed in an inverted downward mode.

As a further improvement of the invention, the cleaning strip comprises a vertical plate and a contact block, the upper end of the vertical plate is connected with the inner shaft of the plate protective shell, the left side of the contact block is attached to the right side of the vertical plate, the contact block is in a concave shape and made of polyethylene, and the cleaning strip is non-conductive and wear-resistant.

As a further improvement of the invention, the contact block comprises an elastic plate, a clearing plate, spring columns, a clearing block and a movable clearing structure, the left side of the elastic plate is welded and connected with the right side of the lower end of the vertical plate, the left side of the clearing plate is fixedly connected with the right side of the elastic plate, the spring columns are fixedly connected with the right side of the clearing plate, the clearing block is attached to the outer side of the spring columns, the left side of the movable clearing structure is attached to the right side of the elastic plate, the elastic plates are fork-shaped and are two in number, and the clearing plate is distributed in a vertically symmetrical mode by taking the clearing plate as the center.

As a further improvement of the present invention, the movable cleaning structure includes a fixed plate, a fixed block, and a scraping head, wherein the fixed plate is welded to the right side of the spring plate, the fixed block is movably engaged with the right side of the fixed plate, the scraping head is attached to the lower side of the fixed block, and the scraping heads are rectangular and arranged in parallel and close arrangement.

Advantageous effects

Compared with the prior art, the invention has the following beneficial effects:

1. the heat in the wire is absorbed by the temperature absorbing device to push the cleaner to swing, the heat dissipated by the heat absorbing plate in the absorbing process is collected and then transmitted to the heat collecting tube, and finally the heat is collected inside the expansion supporting plate, the expansion supporting plate is heated to expand to push the plate protecting shell to swing, and the cleaning strip is driven by the plate protecting shell to move up and down to cut the fuse wire continuously, so that the fuse wire is cut off at high speed, and the fuse wire is prevented from being adhered to the wire on the circuit.

2. The riser can drive the contact piece and carry out the removal from top to bottom when rubbing the varistor piece surface, carries out the roof pressure to cleaing away the board through the springboard simultaneously, strengthens the pressure to the varistor piece surface, and the spring post is released and is clear away the piece and strike off the varistor piece side, and the fuse that prevents to melt forms the work of route termination varistor piece on the varistor piece surface, has improved the job stabilization nature of varistor piece.

Drawings

Fig. 1 is a schematic structural diagram of a high-efficiency thermal protection type varistor according to the present invention.

Fig. 2 is a schematic perspective view of a varistor device according to the present invention.

FIG. 3 is a schematic side view of the internal structure of the self-cleaning device of the present invention.

FIG. 4 is a schematic side view of a half-section structure of a heat absorber according to the present invention.

FIG. 5 is a schematic side view of a half-section of the cleaner of the present invention.

FIG. 6 is a schematic perspective view of a cleaning strip according to the present invention.

Fig. 7 is a schematic top view of an internal structure of a contact block according to the present invention.

FIG. 8 is an enlarged view of a portion of a movable cleaning structure according to the present invention.

In the figure: protective cover-1, connector-2, piezoresistor device-3, bottom plate-31, constant value ohmic resistor-32, indicator light-33, self-cleaning device-34, wiring-341, fixed cover-342, heat-absorbing device-343, cleaner-344, piezoresistor sheet-345 heat-absorbing plate-43 a, heat-collecting tube-43 b, expansion supporting plate-43 c and connecting block-43 d, the device comprises a connecting rod-44 a, a plate protective shell-44 b, a cleaning strip-44 c, a cutting strip-44 d, a vertical plate-c 1, a contact block-c 2, an elastic plate-c 21, a cleaning plate-c 22, a spring column-c 23, a cleaning block-c 24, a movable cleaning structure-c 25, a fixed plate body-e 1, a fixed block body-e 2 and a scraping head-e 3.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

example 1:

as shown in figures 1 to 5:

the invention provides a high-efficiency thermal protection type piezoresistor, which structurally comprises a protective cover 1, a connector 2 and a piezoresistor device 3, wherein the outer side of the protective cover 1 is fixedly connected with the outer side of the connector 2 in an embedded mode, the piezoresistor device 3 is connected with the inner side of the protective cover 1 in a welding mode, the piezoresistor device 3 comprises a bottom plate 31, a constant value ohmic resistor 32, an indicator lamp 33 and a self-cleaning device 34, the outer side of the bottom plate 31 is fixedly connected with the inner side of the lower end of the protective cover 1 in an embedded mode, the lower end of the constant value ohmic resistor 32 is connected with the upper side of the bottom plate 31 in a welding mode, the lower end of the indicator lamp 33 is fixedly connected with the middle of.

The self-cleaning device 34 comprises a connection wire 341, a fixed cover 342, a temperature absorbing device 343, a cleaner 344 and a varistor sheet 345, wherein the lower end of the connection wire 341 is connected with the upper side of the bottom plate 31 in a welding manner, the inner side of the lower end of the fixed cover 342 is attached to the lower side of the temperature absorbing device 343, the outer side of the temperature absorbing device 343 is fixedly connected with the upper end of the connection wire 341 in an embedded manner, the cleaner 344 is in clearance fit with the upper end of the varistor sheet 345, the lower end of the varistor sheet 345 is connected with the upper end of the connection wire 341 in a welding manner, the number of the temperature absorbing devices 343 is two, and the temperature absorbing devices 343 are distributed in bilateral symmetry with the varistor sheet 345 as the center, so that the temperature rising of the left side of the temperature absorbing device 343 is.

The heat absorbing device 343 comprises a heat absorbing plate 43a, a heat collecting tube 43b, an expansion supporting plate 43c and a connecting block 43d, the lower end of the heat absorbing plate 43a is in interference fit with the outer side of the connection wire 341, the heat collecting tube 43b is embedded and fixedly connected with the inner part of the upper end of the heat absorbing plate 43a, the expansion supporting plate 43c is welded and connected with the outer side of the connecting block 43d, the middle part of the connecting block 43d is embedded and fixedly connected with the outer side of the heat collecting tube 43b, the expansion supporting plate 43c is arched and made of carbon spring steel, and has the characteristic of high thermal expansion coefficient, so that the heat absorbed by the heat collecting tube 43b can upwards jack the expansion supporting plate 43c, the expansion supporting plates 43c are two in number and are arranged in the same straight line, the jacking distance of the expansion supporting plate 43c is doubled.

The cleaner 344 comprises a connecting rod 44a, a plate protecting shell 44b, cleaning strips 44c and cutting strips 44d, wherein the upper sides of connecting blocks 43d at the lower end of the connecting rod 44a are attached to each other, the plate protecting shell 44b is in clearance fit with the outer side of the upper end of a fixed cover 342, the upper ends of the cleaning strips 44c are connected with the inner shaft of the fixed cover 342, the cutting strips 44d are welded to the outer sides of the cleaning strips 44c, the cleaning strips 44c are two in number and are distributed in bilateral symmetry with the cutting strips 44d as the center, the lower ends of the cutting strips 44d are pointed and are arranged upside down, so that the cleaning strips 44c can clean the two sides of the varistor sheet 345 and completely cut off the fuse through the cutting strips 44 d.

The specific use mode and function of the embodiment are as follows:

in the invention, the connector 2 outside the protective cover 1 is connected with an electronic component, then the current filtered by the constant value ohmic resistor 32 is regulated by the pressure sensitive resistor disc 345 through the bottom plate 31 below the pressure sensitive resistor device 3, the indicator lamp 33 is used for checking the working state, when the fusing is not normally carried out, the self-cleaning device 34 is connected to the outside of the fixed cover 342 through the wiring 341, then the heat in the lead is absorbed by the heat absorbing device 343 to push the cleaner 344 to swing, the heat emitted by the wiring 341 is collected by the heat absorbing plate 43a in the absorbing process and then is conducted to the heat collecting tube 43b, and finally is collected in the expansion plate 43c, the expansion plate 43c is heated and expanded to increase the height thereof, the connecting block 43d is driven to rise, the connecting rod 44a is pushed to push the plate protective shell 44b to swing, the cleaning strip 44c is driven by the plate protective shell 44b to move up and down to enable the cutting strip 44d to continuously, the speed of fuse disconnection is accelerated, and the fuse is prevented from adhering on a line.

Example 2:

as shown in fig. 6 to 8:

the cleaning strip 44c comprises a vertical plate c1 and a contact block c2, the upper end of the vertical plate c1 is connected with the inner shaft of the plate protective shell 44b, the left side of the contact block c2 is attached to the right side of the vertical plate c1, the contact block c2 is in a concave shape and made of polyethylene, and the contact block c2 has the advantages of being non-conductive and wear-resistant, so that the melting fuse on the outer side of the piezoresistor sheet 345 can be cleaned by the contact block c2, and the working stability of the piezoresistor sheet 345 is improved.

The contact block c2 comprises an elastic plate c21, a clearing plate c22, a spring post c23, a clearing block c24 and a movable clearing structure c25, the left side of the elastic plate c21 is connected with the right side of the lower end of a vertical plate c1 in a welding mode, the left side of the clearing plate c22 is fixedly connected with the right side of an elastic plate c21, the spring post c23 is fixedly connected with the right side of the clearing plate c22 in a embedding mode, the clearing block c24 is attached to the outer side of the spring post c23, the left side of the movable clearing structure c25 is attached to the right side of the elastic plate c21, the elastic plates c21 are fork-shaped and two in number, the clearing plate c22 is in vertical symmetrical distribution as the center, so that the clearing plate c22 can be stably attached to two sides of the varistor 345, the attaching degree of two sides of the varistor 345 is increased, and the clearing effect of the varistor 345 is improved.

Wherein, activity clearance structure c25 includes fixed plate body e1, fixed block e2, scrapes first e3, fixed plate body e1 and bullet board c21 right side welded connection, fixed block e2 and fixed plate body e1 right side activity block, scrape first e3 and fixed plate body e1 right side and laminate mutually, scrape first e3 and laminate mutually with fixed block e2 downside, scrape first e3 shape and be the rectangle to be parallel closely arranged, make and scrape first e3 and the laminating that varistor piece outside edge can be effectual, improved the effective area of clearance.

The specific use mode and function of the embodiment are as follows:

in the invention, when the riser c1 rubs the surface of the varistor 345, the contact block c2 is driven to move up and down, the elastic plate c21 presses the clearing plate c22 to increase the pressure on the surface of the varistor 345, so that the clearing effect is improved, the spring column c23 is pushed to move outwards, the spring column c23 pushes the clearing block c24 to scrape the side surface of the varistor 345, when the scraping is carried out, the outer side of the varistor 345 is continuously rubbed by the fixed plate e1 and the scraping head e3 on the outer side of the fixed block e2, so that the clearing range is increased, a path is prevented from being formed on the surface of the varistor 345 by a molten fuse, the work of the varistor 345 is stopped, and the work stability of the varistor 345 is improved.

The technical solutions of the present invention or similar technical solutions designed by those skilled in the art based on the teachings of the technical solutions of the present invention are all within the scope of the present invention to achieve the above technical effects.