CN1979994A - Power-supplying, charging conversion circuit both for ac. and dc. electric tool - Google Patents
Power-supplying, charging conversion circuit both for ac. and dc. electric tool Download PDFInfo
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- CN1979994A CN1979994A CN 200610053740 CN200610053740A CN1979994A CN 1979994 A CN1979994 A CN 1979994A CN 200610053740 CN200610053740 CN 200610053740 CN 200610053740 A CN200610053740 A CN 200610053740A CN 1979994 A CN1979994 A CN 1979994A
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- negative pole
- power source
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Abstract
The circuit includes relay, switch, first resistance, and diode. Winding of relay is connected between output positive pole and output negative pole of external power source (EPS). Normally open contact of relay is connected to output positive pole of EPS, and normally closed contact is connected to positive pole of chargeable battery. Negative pole of chargeable battery is connected to output negative pole of EPS. Through switch, common contact of relay is connected to output positive pole of load. Negative pole of load is connected to output negative pole of EPS. One end of first resistance is connected to output positive pole of EPS; and the other end through diode is connected to positive pole of chargeable battery. Comparing with prior art, the invention supplies power to load from chargeable battery when no EPS is connected, and when EPS is connected, supplies power to load from EPS as well as supplies power to chargeable battery.
Description
Technical field
The present invention relates to field of power tools, in particular, relate to a kind of power supply, charging conversion circuit of AC/DC bi service electric tool.
Background technology
Existing electric drill is divided into AC and DC two big classes, the former adopts alternating current machine, directly attaching plug is inserted in the AC Power supply socket and powers, and its defective is to be equipped with oneself the socket of power supply when mobile, afterbody drags live wire during work, thereby is suitable for using in stationary applica-tions; The latter adopts direct current machine, powers with the rechargeable battery packet mode that is plugged under the handle, thereby is suitable for using in mobile occasion, easy to carry, use more flexible, yet its shortcoming exactly is that also the power supply capacity of rechargeable battery bag is limited, once charging at most can only the continuous firing dozens of minutes.
For this reason, my patent No. is that a kind of advantage that had both had the direct power supply use that exchanges electric drill is provided in the formerly Chinese utility model patent " the dual-purpose electric drill of a kind of interchange " of ZL02260261.5 (notification number is CN2569953Y), has the electric drill of AC/DC that D.C. electric drill need not power supply and moves the advantage of use again, it comprises housing, be installed on direct current machine and transmission mechanism in the housing, have on the housing and can hold the cavity that power brick is inserted, and just in corresponding power brick, the position of negative pole just is provided with, the negative pole contact, and include a direct current convert packets (being also referred to as " power supply adaptor "), be provided with the ac-dc converter circuit plate in it, can directly use with the exchange way power supply, and move the occasion of use at needs, then only need to replace existing power brick and get final product.
However, existing power brick still needs special charger, need comprise an ac-dc converter circuit in it undoubtedly again, and this has not only increased manufacturing cost, use also inconvenience, same problem also occurs on the electric tool of other AC/DC.
Summary of the invention
Technical problem to be solved by this invention is power supply, the charging conversion circuit that a kind of AC/DC bi service electric tool is provided at above-mentioned prior art present situation, make by this change-over circuit and just can realize powering and to the rechargeable battery two kinds of functions of charging to load is direct, and be automatically converted to by rechargeable battery powered when externally power supply is removed with same external power source.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: the power supply of this AC/DC bi service electric tool, charging conversion circuit includes relay (J), switch (K), first resistance (R1) and diode (D), the coil of its repeat circuit (J) is connected between the output cathode and output negative pole of external power source, the normally opened contact of relay (J) connects the output cathode of external power source, normally-closed contact (NC) connects the positive pole of rechargeable battery (B), the negative pole of rechargeable battery (B) connects the output negative pole of external power source, the common junction (COM) of relay (J) connects the positive pole of load (MG) through switch (K), the negative pole of load (MG) connects the output negative pole of external power source, and the output cathode of described first resistance (R1) termination external power source, the other end connects the positive pole of rechargeable battery (B) through diode (D).
In order further to have the dispatch from foreign news agency deixis, on the foregoing circuit basis, also can increase the dispatch from foreign news agency indication loop that constitutes by second resistance (R2) and light-emitting diode (LED), the output cathode of second resistance (R2) termination external power source wherein, the other end connects the output negative pole of external power source through light-emitting diode (LED).
Compared with prior art, when the present invention inserts at no external power source, because relay coil dead electricity, rechargeable battery i.e. normally-closed contact by relay, common junction powers to the load, and when inserting such as external dc powers such as power supply adaptors, relay coil gets, the normally opened contact adhesive, external power source i.e. normally opened contact by relay, common junction powers to the load, simultaneously again by first resistance, diode charges to rechargeable battery, thereby realize just powering and to the rechargeable battery two kinds of functions of charging to load is direct, and be automatically converted to by rechargeable battery powered when externally power supply is removed with same power supply adaptor (or ac-dc converter circuit).
Description of drawings
Fig. 1 is the circuit theory schematic diagram of the embodiment of the invention one.
Fig. 2 is the circuit theory schematic diagram of the embodiment of the invention two.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, be embodiments of the invention one, the power supply of AC/DC bi service electric tool, charging conversion circuit includes relay J, K switch, first resistance R 1 and diode D, wherein the coil of relay J is connected between the output cathode and output negative pole of external power source, the output cathode that the normally opened contact NO of relay J connects external power source links to each other, normally-closed contact NC connects the positive pole of rechargeable battery B, the negative pole of rechargeable battery B connects the output negative pole of external power source, the common junction COM of relay J connects the positive pole of load MG through K switch, the negative pole of load MG connects the output negative pole of external power source, and the output cathode of described first resistance R, 1 one termination external power sources, the other end connects the positive pole of rechargeable battery B through diode D.
When no external power source inserts, because relay J coil losing electricity, rechargeable battery B promptly powers to load MG through K switch by normally-closed contact NC, the common junction COM of relay J, and when inserting such as external dc powers such as power supply adaptors, the relay J coil gets, its normally opened contact NO adhesive, external power source are promptly powered to load MG through K switch by normally opened contact NO, the common junction COM of relay J, charge to rechargeable battery B by first resistance R 1, diode D again simultaneously.
As shown in Figure 2, be embodiments of the invention two, it has increased the dispatch from foreign news agency indication loop that is made of second resistance R 2 and LED on the basis of embodiment one, the output cathode of second resistance R, 2 one termination external power sources wherein, the other end connects the output negative pole of external power source through LED;
Like this, when no external power source inserts, the relay J coil losing electricity, its normally opened contact NO is in off-state, thereby the LED no current passes through, and is not luminous; And when inserting such as external dc powers such as power supply adaptors, it is electric that the relay J coil gets, and its normally opened contact NO adhesive is so LED promptly gets electroluminescence.
Claims (2)
1, a kind of power supply of AC/DC bi service electric tool, charging conversion circuit, it is characterized in that including relay (J), switch (K), first resistance (R1) and diode (D), the coil of its repeat circuit (J) is connected between the output cathode and output negative pole of external power source, the normally opened contact (NO) of relay (J) connects the output cathode of external power source, normally-closed contact (NC) connects the positive pole of rechargeable battery (B), the negative pole of rechargeable battery (B) connects the output negative pole of external power source, the common junction (COM) of relay (J) connects the positive pole of load (MG) through switch (K), the negative pole of load (MG) connects the output negative pole of external power source, and the output cathode of described first resistance (R1) termination external power source, the other end connects the positive pole of rechargeable battery (B) through diode (D).
2, the power supply of AC/DC bi service electric tool according to claim 1, charging conversion circuit, it is characterized in that also comprising the dispatch from foreign news agency indication loop that constitutes by second resistance (R2) and light-emitting diode (LED), the output cathode of second resistance (R2) termination external power source wherein, the other end connects the output negative pole of external power source through light-emitting diode (LED).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610053740 CN1979994A (en) | 2006-09-30 | 2006-09-30 | Power-supplying, charging conversion circuit both for ac. and dc. electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610053740 CN1979994A (en) | 2006-09-30 | 2006-09-30 | Power-supplying, charging conversion circuit both for ac. and dc. electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1979994A true CN1979994A (en) | 2007-06-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610053740 Pending CN1979994A (en) | 2006-09-30 | 2006-09-30 | Power-supplying, charging conversion circuit both for ac. and dc. electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1979994A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807803A (en) * | 2010-03-17 | 2010-08-18 | 东莞市歌美数码科技有限公司 | Switch control power supply circuit |
| CN102064577A (en) * | 2010-07-15 | 2011-05-18 | 杭州铁城信息科技有限公司 | Charging self-locking structure for on-board charger |
| CN103312008A (en) * | 2013-07-05 | 2013-09-18 | 庄景阳 | Manual laptop power supply switching device |
| CN103368252A (en) * | 2013-07-05 | 2013-10-23 | 庄景阳 | Automatic switchover device for standby power supply of notebook computer |
| CN107204635A (en) * | 2016-08-31 | 2017-09-26 | 天佑电器（苏州）有限公司 | Alterating and direct current source control device, toolroom machine and dust catcher with the device |
| CN114758488A (en) * | 2022-03-17 | 2022-07-15 | 江苏大学 | A passive switch device |
| CN114844054A (en) * | 2021-01-30 | 2022-08-02 | 利思电气（上海）有限公司 | Alternating current-direct current self-adaptive power quality optimization device |
-
2006
- 2006-09-30 CN CN 200610053740 patent/CN1979994A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807803A (en) * | 2010-03-17 | 2010-08-18 | 东莞市歌美数码科技有限公司 | Switch control power supply circuit |
| CN102064577A (en) * | 2010-07-15 | 2011-05-18 | 杭州铁城信息科技有限公司 | Charging self-locking structure for on-board charger |
| CN103312008A (en) * | 2013-07-05 | 2013-09-18 | 庄景阳 | Manual laptop power supply switching device |
| CN103368252A (en) * | 2013-07-05 | 2013-10-23 | 庄景阳 | Automatic switchover device for standby power supply of notebook computer |
| CN107204635A (en) * | 2016-08-31 | 2017-09-26 | 天佑电器（苏州）有限公司 | Alterating and direct current source control device, toolroom machine and dust catcher with the device |
| CN107204635B (en) * | 2016-08-31 | 2020-08-28 | 天佑电器（苏州）有限公司 | AC/DC power supply control device, tool machine with same and dust collector |
| CN114844054A (en) * | 2021-01-30 | 2022-08-02 | 利思电气（上海）有限公司 | Alternating current-direct current self-adaptive power quality optimization device |
| CN114758488A (en) * | 2022-03-17 | 2022-07-15 | 江苏大学 | A passive switch device |
| CN114758488B (en) * | 2022-03-17 | 2023-02-24 | 江苏大学 | Passive switch device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |