CN110752578B - Circuit protection device for paper shredder - Google Patents
Circuit protection device for paper shredder Download PDFInfo
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- CN110752578B CN110752578B CN201911039218.7A CN201911039218A CN110752578B CN 110752578 B CN110752578 B CN 110752578B CN 201911039218 A CN201911039218 A CN 201911039218A CN 110752578 B CN110752578 B CN 110752578B
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- fixedly connected
- circuit
- kneader
- spring
- thermistor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/042—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/047—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using a temperature responsive switch
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Abstract
The utility model provides a circuit protection device for kneader, relates to office equipment technical field, including the mount pad, the left middle part fixedly connected with piezo-resistor of mount pad. This circuit protection device for kneader, use through the cooperation of piezo-resistor and thermistor, under the initial condition, thermistor's resistance is higher, the place circuit is equivalent to the short circuit, and piezo-resistor's resistance is less, so piezo-resistor's circuit intercommunication, conducting block and electric ring piece electric connection, guarantee the normal intercommunication of kneader's circuit, when kneader shredded paper breaks down, voltage risees, piezo-resistor's resistance increase, at this moment piezo-resistor's circuit disconnection, make kneader stop work, avoid kneader further impaired, because the temperature of circuit risees, so thermistor's resistance reduces, at this moment piezo-resistor's circuit intercommunication, make the heating wire begin to heat, thereby reached the effect of protection kneader, effectively guarantee kneader's safety in utilization, the life of kneader has been prolonged.
Description
Technical Field
The invention relates to the technical field of office equipment, in particular to a circuit protection device for a paper shredder.
Background
The paper shredder is office equipment frequently used in an office, and some unnecessary confidential documents are often placed into the paper shredder to be destroyed and shredded, so that important documents are prevented from being used by a person with a heart to cause loss.
When the current paper shredder is used, the situation of paper jam often occurs, and when the situation occurs, the paper shredder is in an overload state every time, the internal temperature of the paper shredder is overhigh, the circuit voltage is suddenly increased, the circuit of the paper shredder is easily damaged, and the driving equipment such as a motor is seriously damaged, so that the paper shredder can be directly scrapped.
Therefore, the circuit protection device for the paper shredder is provided to solve the problems, the effect of protecting the paper shredder is achieved by matching the piezoresistor with the thermistor, the use safety of the paper shredder is effectively ensured, the service life of the paper shredder is prolonged, the effect of ensuring the use safety of the paper shredder is achieved by matching the electric heating wire with the bimetallic strip, the protection device is effectively prevented from being excessively expanded, and the use safety is ensured.
Disclosure of Invention
The invention adopts the following technical scheme for realizing the technical purpose: a circuit protection device for a paper shredder comprises a mounting seat, wherein a piezoresistor is fixedly connected with the middle part of the left side of the mounting seat, a thermistor connected with the piezoresistor in parallel is fixedly connected with the middle part of the left side of the mounting seat, a movable groove is formed in the middle part of the right side of the mounting seat, an electric heating wire is fixedly connected with the inner bottom wall of the movable groove, a limiting column is fixedly connected with the inner bottom wall of the movable groove, a conducting strip is fixedly connected with the top of the limiting column, a bimetallic strip movably connected with the bottom of the conducting strip is fixedly connected with the middle part of the limiting column, a pressing block is movably connected with the middle part of the movable groove, shrinkage grooves are formed in two sides of the pressing block, a spring I is fixedly connected with the inner wall of the shrinkage groove, a conducting block movably connected with the inner wall of the shrinkage groove is fixedly connected with an electric ring sheet matched with the conducting block, and clamping grooves are formed in the tops of two sides of the pressing block, the outer side of the pressing block is fixedly connected with a spring II fixedly connected with the inner top wall of the mounting seat, the inner wall of the top of the mounting seat is fixedly connected with a spring III, and the inner side of the spring III is fixedly connected with a clamping block matched with the clamping groove.
The invention has the following beneficial effects:
1. this circuit protection device for kneader, use through the cooperation of piezo-resistor and thermistor, under the initial condition, thermistor's resistance is higher, place circuit is equivalent to broken circuit, and piezo-resistor's resistance is less, so piezo-resistor's circuit intercommunication, conducting block and electric ring piece electric connection, guarantee the normal intercommunication of kneader's circuit, when kneader shredded paper breaks down, voltage risees, piezo-resistor's resistance increase, at this moment piezo-resistor's circuit disconnection, make kneader stop work, avoid kneader further impaired, because the temperature of circuit risees, so thermistor's resistance reduces, at this moment thermistor's circuit intercommunication, make the heating wire begin to heat, thereby reached the effect of protection kneader, effectively guarantee kneader's safety in utilization, the life of kneader has been prolonged.
2. This circuit protection device for kneader, use through the cooperation of heating wire and bimetallic strip, the circuit of heating wire communicates and begins to heat, the air with the activity tank bottom is heated, gas expansion, make according to the piece rebound, after gas thermal expansion, gas will be according to the piece upwards promotion, and simultaneously, the conducting block moves along the inner wall of electricity ring piece, when gas thermal expansion to a certain extent, the conducting block separates with the electricity ring piece, and simultaneously, the fixture block is pegged graft with the draw-in groove, prevent to press the piece decline, bimetallic strip reaches certain and downwarping because the temperature this moment, circuit disconnection with the heating wire, prevent that gas from being heated excessive expansion, thereby reached the effect of guaranteeing kneader safety in utilization, effectively prevent that protection device from expanding excessively, guaranteed safe in utilization.
Further, the mounting seat is made of hard insulating materials, the middle of the mounting seat is provided with a mounting hole matched with the piezoresistor and the thermistor in a homogeneous mode, the resistance of the piezoresistor changes along with voltage, the larger the voltage is, the larger the resistance is, the piezoresistor is electrically connected with the electric ring piece, and the resistance of the thermistor changes along with temperature, the higher the temperature is, and the smaller the resistance is.
Furthermore, the shape of the movable groove is cuboid, the size of the movable groove is smaller than that of the mounting seat, the electric heating wire is connected with a circuit of the thermistor in series, and the limiting column is made of high-temperature-resistant hard non-conductor materials.
Further, the conducting strip is made of copper and is electrically connected with the electric ring piece, and the bimetallic strip is composed of a copper sheet at the top and an iron sheet at the bottom and is electrically connected with the electric heating wire.
Furthermore, the pressing block is made of a hard non-conductor material, a waterproof gasket is fixedly connected to the outer side of the top of the pressing block, the first spring is a compression spring, the conductive blocks are made of copper materials, and the number of the conductive blocks is two.
Further, the electric ring piece is made of copper materials and is connected with the main circuit in series, the second spring is a compression spring, the third spring is a compression spring, the clamping blocks are made of non-conductor hard materials, and the number of the clamping blocks is two.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a rotating rod structure according to the present invention;
FIG. 3 is an enlarged partial view of portion A of FIG. 1;
FIG. 4 is an enlarged partial view of the portion B of FIG. 2 according to the present invention;
in the figure: 1. a mounting seat; 2. a voltage dependent resistor; 3. a thermistor; 4. a movable groove; 5. an electric heating wire; 6. A limiting column; 7. a conductive sheet; 8. a bimetal; 9. according to blocks; 10. a contraction groove; 11. a first spring; 12. A conductive block; 13. an electrical ring sheet; 14. a card slot; 15. a second spring; 16. a third spring; 17. and (7) clamping blocks.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a circuit protection device for a paper shredder comprises a mounting base 1, the mounting base 1 plays a role of fixing each component, the mounting base 1 is made of hard insulating material, the middle part of the mounting base 1 is provided with a mounting hole matched with a piezoresistor 2 and a thermistor 3, the resistance of the piezoresistor 2 changes with voltage, the higher the voltage is, the higher the resistance is, the piezoresistor 2 is electrically connected with an electric ring piece 13, the higher the temperature is, the higher the resistance of the thermistor 3 changes with temperature, the lower the resistance is, the middle part of the left side of the mounting base 1 is fixedly connected with the piezoresistor 2, the piezoresistor 2 plays a role of controlling the circuit communication condition, the middle part of the left side of the mounting base 1 is fixedly connected with the thermistor 3 connected with the piezoresistor 2 in parallel, the thermistor 3 plays a role of controlling the circuit communication condition, the middle part of the right side of the mounting base 1 is provided with a movable groove 4, the movable tank 4 serves to store the compressed gas.
The shape of the movable groove 4 is cuboid, the size of the movable groove 4 is smaller than that of the mounting seat 1, the heating wire 5 is connected with the circuit of the thermistor 3 in series, the material of the limiting column 6 is high temperature resistant hard non-conductor material, the inner bottom wall of the movable groove 4 is fixedly connected with the heating wire 5, the heating wire 5 plays a role of heating compressed air, the inner bottom wall of the movable groove 4 is fixedly connected with the limiting column 6, the limiting column 6 plays a role of fixing a conducting strip 7 and a bimetallic strip 8, the top of the limiting column 6 is fixedly connected with the conducting strip 7, the conducting strip 7 plays a role of communicating with the circuit, the material of the conducting strip 7 is copper material, the conducting strip 7 is electrically connected with an electric ring piece 13, the bimetallic strip 8 is composed of a copper sheet at the top and an iron sheet at the bottom, the bimetallic strip 8 is electrically connected with the heating wire 5, the middle part of the limiting column 6 is fixedly connected with the bimetallic strip 8 movably connected with the bottom of the conducting strip 7, the bimetallic strip 8 plays a role in temperature control, the safety of the protection device is effectively protected, the middle part of the movable groove 4 is movably connected with the pressing block 9, and the pressing block 9 plays a role in transmission.
The material of the pressing block 9 is a hard non-conductor material, the outer side of the top of the pressing block 9 is fixedly connected with a waterproof gasket, a first spring 11 is a compression spring, the material of the conductive block 12 is a copper material, the number of the conductive blocks 12 is two, two sides of the pressing block 9 are respectively provided with a contraction groove 10, the contraction grooves 10 play a role in facilitating the sliding of the pressing block 9, the inner wall of the contraction groove 10 is fixedly connected with a first spring 11, the first spring 11 plays a role in ejecting the conductive blocks 12 and contacting with an electric ring piece 13, so as to effectively ensure the stability of a circuit, the outer side of the first spring 11 is fixedly connected with the conductive blocks 12 movably connected with the inner wall of the contraction groove 10, the conductive blocks 12 play a role in communicating the circuit, the inner wall of the contraction groove 10 is fixedly connected with an electric ring piece 13 matched with the conductive blocks 12, the electric ring piece 13 plays a role in communicating the circuit, the material of the electric ring piece 13 is a copper material, and the electric ring piece 13 is connected with a main circuit in series, spring two 15 is compression spring, spring three 16 is compression spring, fixture block 17's material is non-conductor hard material and fixture block 17's quantity is two, draw-in groove 14 has all been seted up at the top according to piece 9 both sides, draw-in groove 14 plays the joint and presses the effect of piece 9, press the outside fixedly connected with of piece 9 and mount pad 1 interior roof fixed connection's spring two 15, spring two 15 plays the effect of offsetting compressed air inflation power under the normal atmospheric temperature, the inner wall fixedly connected with spring three 16 at mount pad 1 top, spring three 16 plays the effect of being convenient for fixture block 17 to pop out, the inboard fixedly connected with of spring three 16 and the fixture block 17 of draw-in groove 14 looks adaptation, fixture block 17 plays the effect of restriction according to piece 9 motion.
The working principle is as follows: in the initial state, the thermistor 3 has a high resistance, the circuit is equivalent to an open circuit, the resistance of the thermistor 2 is small, so that the circuit of the thermistor 2 is connected, the conductive block 12 is electrically connected with the electric ring piece 13 to ensure the normal connection of the circuit of the paper shredder, when the paper shredder breaks down, the voltage rises, the resistance of the thermistor 2 increases, at the moment, the circuit of the thermistor 2 is disconnected, the paper shredder stops working, the paper shredder is prevented from being further damaged, the temperature of the circuit rises, so that the resistance of the thermistor 3 is reduced, at the moment, the circuit of the thermistor 3 is connected, and the electric heating wire 5 starts to heat.
The circuit of heating wire 5 communicates and begins to heat, the air with activity groove 4 bottom is heated, gas expansion, make according to piece 9 rebound, after gas thermal expansion, gas will be according to piece 9 promotion upwards, and simultaneously, conducting block 12 moves along the inner wall of ring piece 13, when gas thermal expansion to certain extent, conducting block 12 and ring piece 13 separation, and simultaneously, fixture block 17 and draw-in groove 14 peg graft, prevent to press piece 9 to descend, bimetallic strip 8 reaches certain and downwarping because of the temperature this moment, the circuit with heating wire 5 breaks off, prevent that gas from being heated excessive expansion, thereby reached the effect of guaranteeing kneader safety in utilization, effectively prevent that protection device from expanding excessively, use safety has been guaranteed.
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)
1. The utility model provides a circuit protection device for kneader, includes mount pad (1), its characterized in that: the middle part of the left side of the mounting seat (1) is fixedly connected with a piezoresistor (2), the middle part of the left side of the mounting seat (1) is fixedly connected with a thermistor (3) which is connected with the piezoresistor (2) in parallel, the middle part of the right side of the mounting seat (1) is provided with a movable groove (4), the inner bottom wall of the movable groove (4) is fixedly connected with an electric heating wire (5), the inner bottom wall of the movable groove (4) is fixedly connected with a limiting column (6), the top of the limiting column (6) is fixedly connected with a conducting strip (7), the middle part of the limiting column (6) is fixedly connected with a bimetallic strip (8) which is movably connected with the bottom of the conducting strip (7), the middle part of the movable groove (4) is movably connected with a pressing block (9), two sides of the pressing block (9) are both provided with contraction grooves (10), the inner wall of each contraction groove (10) is fixedly connected with a spring I (11), the outer side of the spring I (11) is fixedly connected with a conducting block (12) which is movably connected with the inner wall of the contraction groove (10), an electric ring piece (13) matched with the conductive block (12) is fixedly connected to the inner wall of the contraction groove (10), clamping grooves (14) are formed in the tops of the two sides of the pressing block (9), a second spring (15) fixedly connected with the inner top wall of the mounting seat (1) is fixedly connected to the outer side of the pressing block (9), a third spring (16) is fixedly connected to the inner wall of the top of the mounting seat (1), and a clamping block (17) matched with the clamping grooves (14) is fixedly connected to the inner side of the third spring (16);
the mounting seat (1) is made of hard insulating materials, and the middle part of the mounting seat (1) is provided with a mounting hole matched with the piezoresistor (2) and the thermistor (3);
the resistance of the piezoresistor (2) changes along with the voltage, the higher the voltage is, the larger the resistance is, the piezoresistor (2) is electrically connected with the electric ring piece (13), the resistance of the thermistor (3) changes along with the temperature, and the higher the temperature is, the smaller the resistance is;
the movable groove (4) is cuboid, and the size of the movable groove (4) is smaller than that of the mounting seat (1);
the electric heating wire (5) is connected with a circuit of the thermistor (3) in series, and the limiting column (6) is made of a high-temperature-resistant hard non-conductor material;
the conducting strip (7) is made of copper materials, the conducting strip (7) is electrically connected with the electric ring strip (13), the bimetallic strip (8) consists of a copper sheet at the top and an iron sheet at the bottom, and the bimetallic strip (8) is electrically connected with the electric heating wire (5);
the pressing block (9) is made of a hard non-conductor material, a waterproof gasket is fixedly connected to the outer side of the top of the pressing block (9), the first spring (11) is a compression spring, the conductive blocks (12) are made of a copper material, and the number of the conductive blocks (12) is two;
the material of electric ring piece (13) is copper material and electric ring piece (13) and total circuit series connection, spring two (15) are compression spring, spring three (16) are compression spring, the material of fixture block (17) is non-conductor hard material and the quantity of fixture block (17) is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911039218.7A CN110752578B (en) | 2019-10-29 | 2019-10-29 | Circuit protection device for paper shredder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911039218.7A CN110752578B (en) | 2019-10-29 | 2019-10-29 | Circuit protection device for paper shredder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110752578A CN110752578A (en) | 2020-02-04 |
| CN110752578B true CN110752578B (en) | 2021-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911039218.7A Active CN110752578B (en) | 2019-10-29 | 2019-10-29 | Circuit protection device for paper shredder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110752578B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1189711A (en) * | 1997-01-29 | 1998-08-05 | 陈艺通 | Sensitively cut-off protector |
| CN102412572A (en) * | 2011-11-16 | 2012-04-11 | 溧阳杰敏电子有限公司 | Temperature switch type over-voltage protection circuit |
| CN108970792A (en) * | 2018-07-12 | 2018-12-11 | 姹や匠 | A kind of shredder |
| CN208970429U (en) * | 2018-12-06 | 2019-06-11 | 扬州宝珠电器有限公司 | A kind of double rivet type thermal protectors |
-
2019
- 2019-10-29 CN CN201911039218.7A patent/CN110752578B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1189711A (en) * | 1997-01-29 | 1998-08-05 | 陈艺通 | Sensitively cut-off protector |
| CN102412572A (en) * | 2011-11-16 | 2012-04-11 | 溧阳杰敏电子有限公司 | Temperature switch type over-voltage protection circuit |
| CN108970792A (en) * | 2018-07-12 | 2018-12-11 | 姹や匠 | A kind of shredder |
| CN208970429U (en) * | 2018-12-06 | 2019-06-11 | 扬州宝珠电器有限公司 | A kind of double rivet type thermal protectors |
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| Publication number | Publication date |
|---|---|
| CN110752578A (en) | 2020-02-04 |
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Effective date of registration: 20211116 Address after: 318050 No. 66, Luoyang street, Luqiao District, Taizhou City, Zhejiang Province Applicant after: Taizhou Kangxin capacitor Co., Ltd Address before: 325000 room 614, Jinxin commercial building, Shengli Road, Lucheng District, Wenzhou City, Zhejiang Province (office use only) Applicant before: Wenzhou Feiyou Network Technology Co., Ltd |
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