CN202964501U - Safety electromagnetic screwdriver - Google Patents
Safety electromagnetic screwdriver Download PDFInfo
- Publication number
- CN202964501U CN202964501U CN 201220649499 CN201220649499U CN202964501U CN 202964501 U CN202964501 U CN 202964501U CN 201220649499 CN201220649499 CN 201220649499 CN 201220649499 U CN201220649499 U CN 201220649499U CN 202964501 U CN202964501 U CN 202964501U
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- coil
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- loop
- screwdriver
- absorber
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Abstract
The utility model discloses a safety electromagnetic screwdriver, which is characterized in that a coil is arranged around a screwdriver rod, and a handle is in a hollow tubular shape; the coil and a resistance-capacitance absorber are sealed and fixed in a tapered cavity at the front end of the handle through epoxy resin, and batteries are arranged in a back cavity of the handle; and the coil, the batteries, a switch and a back cover are sequentially connected in series to form a loop, and the two ends of the coil are also connected with the resistance-capacitance absorber and are connected with the loop in parallel. According to the safety magnetic screwdriver provided by the utility model, the resistance-capacitance absorber connected with the loop in parallel is utilized to absorb and consume counter electromotive forcegenerated when the loop is disconnected so as to prevent human safety incidents caused by impact generated by instantaneous discharge of a line on the human body.
Description
Technical field
The utility model relates to a kind of screwdriver, and particularly a kind of coil magnetization that utilizes is responded to the safety electromagnetic screwdriver that produces magnetic force at driver bit.
Background technology
In maintenance repair, when all kinds of machineries, electrical equipment are installed, screwdriver is the most frequently used instrument.When screwdriver uses; often can run into because the structure of various device is different; the installation position of many fixed screws all is arranged on the position that is difficult to aim at the screw installing hole, causes and installs and the dismounting difficulty, sometimes causes the screw of installation, dismounting to fall into the difficult situation of device interior.For this reason, people have invented the permanent magnetism screwdriver.But cutter head magnetic force deficiency or magnetic force often appear in the permanent magnetism screwdriver in daily use descends and inhales unstable screw, and the permanent magnetism screwdriver is due to problem of materials, can because of the steel fire of cutter head not, service life is short.Therefore, many magnetic screw drivers that can carry out switch control have appearred at present, it is the Chinese patent of CN202377966U as notification number, a kind of magnetic screw driver is disclosed, be provided with battery in its cutter hub, the cutter hub front end is provided with solenoid and switch, and battery and solenoid and switch form a loop, can cutter head are magnetic by switch.But this class electro-magnetism scroll driver is in use, and the back-emf that hot-wire coil produces can discharge when staff touches circuit when outage, gives the uncomfortable sensation of the perverse fiber crops electricity of pin, use dangerous, particularly work high above the ground, the moment electrical stimulation personal injury that can meet accident.
The utility model content
Technical problem to be solved in the utility model is to overcome above-mentioned shortcoming, eliminates the back-emf of coil generation to the impact of human body.
The utility model is taked following technical scheme for solving the problems of the technologies described above: a kind of safety electromagnetic screwdriver, comprise screwdriver rod, handle and bonnet, it is characterized in that, the body of rod of screwdriver rod is wound with coil, handle is hollow tubular, and coil and rc absorber are fixed in the conical cavity of handle front end by epoxy encapsulation; In the handle back cavity, battery is installed, coil, battery, switch and bonnet are followed in series to form the loop, and coil two ends also are connected with rc absorber and in parallel with the loop.
The utility model has the advantages that and utilize the rc absorber in parallel with the loop, the counter electromotive force when absorption and consumption circuit disconnect, the dangerous impact that the people is produced to eliminate the coil back-emf.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is electrical schematic of the present utility model.
In figure: 1-screwdriver rod, 2-epoxy resin, 3-coil, 4-handle, 5-battery, 6-bonnet, 7-rc absorber, 8-switch.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples, referring to Fig. 1 and Fig. 2, a kind of safety electromagnetic screwdriver, comprise screwdriver rod 1, handle 4 and bonnet 6, it is characterized in that, the body of rod of screwdriver rod 1 is wound with coil 3, and handle 4 is hollow tubular, and coil 3 and rc absorber 7 are fixed in the conical cavity of handle 4 front ends by epoxy resin 2 encapsulation; In handle 4 back cavities, battery 5 is installed, coil 3, battery 5, switch 8 and bonnet 6 are followed in series to form the loop, and coil 3 two ends also are connected with rc absorber 7 and in parallel with the loop.
Embodiment:The utility model is according to the electro-magnetism scroll driver of the different magnetic force of screw specification size design.Adopt the irony steel to make screwdriver rod 1; Adopt the conventional hollow tubular handle 4 of making of non-magnetic metal material such as copper, aluminum, or adopt nonmetallic materials such as the processing of nylon rod drilling machine, plastic injection-moulded, ceramic material to fire to make handle 4, handle 4 rear ends are provided with the screw thread with the corresponding engagement of bonnet 6.The bonnet 6 non-magnetic metals of employing such as copper, aluminum are made, and the middle part is provided with spring and switch 8.Adopt nonmetallic materials to make hollow tubular handle 4, the lead-out wire of an end connector of coil 3 is connected at handle 4 rear ends and bonnet 6 screw thread places of screwing, and maintenance is made of the stability in loop coil 3, battery 5, bonnet 6 and switch 8.According to the difference of coil 3 magnetization energy, select the different enamel-covered wire of diameter to carry out coiling.Enamel-covered wire on irony screwdriver rod 1, is successively superposeed during coiling 3, be coiled into from after driver bit to end taper from fine to coarse, can guarantee like this magnetic force of driver bit, can guarantee that again screwdriver normally uses.After coil 3 coilings are complete, screwdriver rod 1 passes from hollow tubular handle 4 rear ends, coil 3 all is set in hollow tubular handle 4, coil 3 and capacitance discharger 7 use liquid-state epoxy resin 2 encapsulation, make screwdriver rod 1 by cast and hollow tubular handle 4 bondings of epoxy resin 2, be solidified into one after doing.3 liang of end connectors of coil are drawn, one end connector is arranged on the front end of handle 4, be connected with battery 5 is anodal, battery 5 negative poles are connected with the spring of bonnet 6, one end of the spring connecting valve 8 of bonnet 6, the other end of switch 8 connects the housing of bonnet 6, and the housing of bonnet 6 and coil 3 other end joint lead-out wires connect and compose the loop.Referring to Fig. 2, coil 3, battery 5, switch 8 and bonnet 6 are followed in series to form the loop, and coil 3 two ends also are connected with rc absorber 7 and in parallel with the loop.
Cell voltage is larger, and the back-emf that the coil energy storage produces is larger.The electro-magnetism scroll driver that surpasses 3V for cell voltage, because the generation back-emf of coil is larger, touching circuit can discharge, and gives the uncomfortable sensation that twinges, and uses dangerous, particularly work high above the ground, the moment electrical stimulation personal injury that can meet accident, rc absorber 7 in parallel, absorb back-emf on the loop, to eliminate the coil back-emf, prevent that circuit from sparking to the impact of human body.In Fig. 2, two of rc absorber 7 joints are connected with two end connectors of coil 3 respectively.
The utility model utilizes the iron core in coil to produce the principle of magnetic force, with coil on screwdriver rod 1, in case coil 3 excitations, induce magnetic field on driver bit and produce magnetic force, can hold the most frequently used all kinds of iron matter screws, thereby can be screwed into safely and fast in nut silk mouth on those various special-shaped workpieces that are difficult to aim at stablizing the screw that holds, thereby reach the effect that improves maintenance, installment work efficient.The utility model particularly is provided with the rc absorber in parallel with the loop 7, absorbs and consumes the counter electromotive force that produces when circuit disconnects, and prevents that circuit from sparking to the impact of human body, uses safety.
Claims (1)
1. a safety electromagnetic screwdriver, comprise screwdriver rod, handle and bonnet, it is characterized in that, the body of rod of screwdriver rod is wound with coil, and handle is hollow tubular, and coil and rc absorber are fixed in the conical cavity of handle front end by epoxy encapsulation; In the handle back cavity, battery is installed, coil, battery, switch and bonnet are followed in series to form the loop, and coil two ends also are connected with rc absorber and in parallel with the loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220649499 CN202964501U (en) | 2012-12-01 | 2012-12-01 | Safety electromagnetic screwdriver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220649499 CN202964501U (en) | 2012-12-01 | 2012-12-01 | Safety electromagnetic screwdriver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202964501U true CN202964501U (en) | 2013-06-05 |
Family
ID=48505629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220649499 Expired - Fee Related CN202964501U (en) | 2012-12-01 | 2012-12-01 | Safety electromagnetic screwdriver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202964501U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107336181A (en) * | 2017-07-27 | 2017-11-10 | 仲杏英 | Portable type screwdriver |
| CN109333429A (en) * | 2018-10-26 | 2019-02-15 | 北京首航艾启威节能技术股份有限公司 | Portable screwdriver that magnetizes |
| CN110890204A (en) * | 2018-09-07 | 2020-03-17 | 中车株洲电力机车研究所有限公司 | High-frequency reactor device for resonant circuit |
-
2012
- 2012-12-01 CN CN 201220649499 patent/CN202964501U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107336181A (en) * | 2017-07-27 | 2017-11-10 | 仲杏英 | Portable type screwdriver |
| CN107336181B (en) * | 2017-07-27 | 2019-11-29 | 诸暨易和项目投资有限公司 | Portable type screwdriver |
| CN110890204A (en) * | 2018-09-07 | 2020-03-17 | 中车株洲电力机车研究所有限公司 | High-frequency reactor device for resonant circuit |
| CN109333429A (en) * | 2018-10-26 | 2019-02-15 | 北京首航艾启威节能技术股份有限公司 | Portable screwdriver that magnetizes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20151201 |
|
| EXPY | Termination of patent right or utility model |