CN204392219U - With the electric tool switch of power-off protection - Google Patents
With the electric tool switch of power-off protection Download PDFInfo
- Publication number
- CN204392219U CN204392219U CN201520151540.XU CN201520151540U CN204392219U CN 204392219 U CN204392219 U CN 204392219U CN 201520151540 U CN201520151540 U CN 201520151540U CN 204392219 U CN204392219 U CN 204392219U
- Authority
- CN
- China
- Prior art keywords
- switch
- terminals
- electric tool
- moved end
- relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/12—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/002—Monitoring or fail-safe circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
- H01H9/06—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner
Abstract
The utility model discloses a kind of electric tool switch with power-off protection, comprise single-pole double-throw switch (SPDT) (K), relay (J), switch first, second and the 3rd terminals (A, B, C), first and second not moved end (K1 of described single-pole double-throw switch (SPDT) (K), K2) corresponding and switch first and second terminals (A, B) connect, one end of relay (J) is connected with switch the 3rd terminals (C), the other end of relay (J) is connected with the moved end (K0) of single-pole double-throw switch (SPDT) (K), one group of normally opened contact (J1) correspondence of relay (J) is connected to moved end (K0) and first not between moved end (K1), described switch first terminals (A) and electric tool one-way electric power plug input is connected, and is connected after switch second terminals (B) and electric tool motor (M) connect together with the 3rd terminals (C) with another input of electric tool one-way electric power plug.Adopt after said structure, have simple and reasonable, safe and reliable, the advantages such as non-artificial startup to be prevented after power-off.
Description
Technical field
The utility model relates to a kind of electric tool switch, particularly a kind of electric tool switch with power-off protection function.
Background technology
Along with the development of society and the progress of science and technology, much work replace by electric tool, the electric tool particularly hand held electric tool scope of application is more and more wider, and demand is increasing.But the electric tool switch at present domestic and international electric tool used does not possess power-off protection function; there is serious potential safety hazard; if particularly hand held electric tool in use suddenly power-off and forget switch is reversed stopped status; no matter continue to be held on hand or to be placed on limit; when power system restoration is powered; electric tool can overturn because of unexpected startup, and working head can cause great bodily injury to the person or property safety.For this reason, many manufacturers and knowledgeable people are studied for the problems referred to above and develop, but not yet have more rational product to emerge so far.
Summary of the invention
For overcoming the above-mentioned defect that existing electric tool switch exists, the purpose of this utility model be to provide a kind of simple and reasonable, safe and reliable, power-off can be prevented after the electric tool switch of band power-off protection of non-artificial startup.
The utility model solves the problems of the technologies described above adopted technical scheme, it comprises single-pole double-throw switch (SPDT), relay, switch first terminals, switch second terminals and switch the 3rd terminals, described single-pole double-throw switch (SPDT) first not moved end with second moved end correspondence be connected with switch first terminals and switch second terminals, one end of relay is connected with switch the 3rd terminals, the other end of relay is connected with the moved end of single-pole double-throw switch (SPDT), and one group of normally opened contact correspondence of relay is connected to the moved end and first of single-pole double-throw switch (SPDT) not between moved end.
The further scheme of the utility model, described switch first terminals and electric tool one-way electric power plug input is connected, and is connected after switch second terminals connect with electric tool motor together with the 3rd terminals with another input of electric tool one-way electric power plug.
After adopting said structure, compared with prior art have the following advantages and effect: because one end of relay is connected with switch the 3rd terminals, the other end of relay is connected with the moved end of single-pole double-throw switch (SPDT), one group of normally opened contact correspondence of relay is connected to the moved end and first of single-pole double-throw switch (SPDT) not between moved end, can realize normal start-stop electric tool during normal work by operation sheet double-pole double throw switch; When having a power failure suddenly, no matter that road, not moved end of single-pole double-throw switch (SPDT) is connected, electric tool accidental activation when restoring electricity can being ensured, causing the great bodily injury to the person or property.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Wherein A switch first terminals, B switch second terminals, C switch the 3rd terminals, J relay, J1 normally opened contact, K single-pole double-throw switch (SPDT), K0 moved end, K1 first not moved end, K2 second not moved end.
Embodiment
Shown in Fig. 1, for the specific embodiments of a kind of electric tool switch with power-off protection of the utility model, it comprises single-pole double-throw switch (SPDT) K, relay J, switch first terminals A, switch second terminals B and switch the 3rd terminals C, described single-pole double-throw switch (SPDT) K first not moved end K1 with second moved end K2 correspondence be connected with switch first terminals A and switch second terminals B, one end of relay J is connected with switch the 3rd terminals C, the other end of relay J is connected with the moved end K0 of single-pole double-throw switch (SPDT) K, one group of normally opened contact J1 correspondence of relay J is connected to the moved end K0 and first of single-pole double-throw switch (SPDT) K not between the K1 of moved end.
Described switch first terminals A and electric tool one-way electric power plug input is connected, and is connected after switch second terminals B connects with electric tool motor M together with the 3rd terminals C with another input of electric tool one-way electric power plug.
Utility model works principle is as follows, after electric tool one-way electric power plug access civil power, if single-pole double-throw switch (SPDT) K is in the first not moved end K1 position, the charged adhesive of relay J, the normally opened contact J1 of relay J connects, even if now single-pole double-throw switch (SPDT) K is in the first not moved end K1 position disconnection, the normally opened contact J1 of relay J remains on-state, the moved end K0 of single-pole double-throw switch (SPDT) K and the same current potential of switch first terminals A, the utility model is in can operating state.When single-pole double-throw switch (SPDT) K push second not moved end K2 position time, switch second terminals B is just equivalent to connect with switch first terminals A, and electric tool motor M starts working.When single-pole double-throw switch (SPDT) K reverse first not moved end K1 position time, motor quits work, and realizes normal start-stop electric tool.
When electric tool normally works after unexpected power-off, single-pole double-throw switch (SPDT) K second not moved end K2 forget position reverse first not moved end K1 position time, if restored electricity suddenly, because when power-off, the normally opened contact J1 of relay J disconnects, moved end K0 and the switch first terminals A of single-pole double-throw switch (SPDT) K also disconnect, therefore electric tool motor M does not have power supply to supply, and electric tool motor M can not accidental activation.After only restoring electricity, single-pole double-throw switch (SPDT) K from second not moved end K2 position reverse the first not moved end K1 position after guaranteeing that relay J normally works, again by single-pole double-throw switch (SPDT) K from first not moved end K1 position reverse second moved end K2 position could normal start, thus ensure that the safe opening of electric tool.
The above; just specific embodiment of the utility model, not makes any pro forma restriction to the utility model, is not departing from the technical solution of the utility model basis; done simple modification, equivalent variations or modification, all fall into protection range of the present utility model.
Claims (2)
1. the electric tool switch with power-off protection, it is characterized in that: comprise single-pole double-throw switch (SPDT) (K), relay (J), switch first terminals (A), switch second terminals (B) and switch the 3rd terminals (C), described single-pole double-throw switch (SPDT) (K) first not moved end (K1) with second moved end (K2) correspondence be connected with switch first terminals (A) and switch second terminals (B), one end of relay (J) is connected with switch the 3rd terminals (C), the other end of relay (J) is connected with the moved end (K0) of single-pole double-throw switch (SPDT) (K), one group of normally opened contact (J1) correspondence of relay (J) is connected to the moved end (K0) and first of single-pole double-throw switch (SPDT) (K) not between moved end (K1).
2. the electric tool switch of band power-off protection according to claim 1; it is characterized in that: described switch first terminals (A) and electric tool one-way electric power plug input is connected, be connected with another input of electric tool one-way electric power plug together with the 3rd terminals (C) after switch second terminals (B) and electric tool motor (M) connect.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520151540.XU CN204392219U (en) | 2015-03-18 | 2015-03-18 | With the electric tool switch of power-off protection |
| DE202016100385.7U DE202016100385U1 (en) | 2015-03-18 | 2016-01-27 | Power tool switch with shutdown protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520151540.XU CN204392219U (en) | 2015-03-18 | 2015-03-18 | With the electric tool switch of power-off protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204392219U true CN204392219U (en) | 2015-06-10 |
Family
ID=53364898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520151540.XU Active CN204392219U (en) | 2015-03-18 | 2015-03-18 | With the electric tool switch of power-off protection |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN204392219U (en) |
| DE (1) | DE202016100385U1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115800235A (en) * | 2021-09-09 | 2023-03-14 | 南京泉峰科技有限公司 | Starting protection circuit applied to electric tool and electric tool |
-
2015
- 2015-03-18 CN CN201520151540.XU patent/CN204392219U/en active Active
-
2016
- 2016-01-27 DE DE202016100385.7U patent/DE202016100385U1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE202016100385U1 (en) | 2016-06-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 558, the Great Wall East Avenue, the Great Wall Economic Development Zone, Jinhua, Zhejiang Patentee after: Polytron Technologies Inc in Zhengyang Address before: 321300 Zhengyang Industrial Investment Co., Ltd., the Great Wall East Avenue, Yongkang, Zhejiang, China, Jinhua Province, No. 558 Patentee before: Yongkang Zhengda Industrial Co., Ltd. |