CN2742450Y - Double voltage motor vehicle maintenance test pencil - Google Patents
Double voltage motor vehicle maintenance test pencil Download PDFInfo
- Publication number
- CN2742450Y CN2742450Y CN 200420005431 CN200420005431U CN2742450Y CN 2742450 Y CN2742450 Y CN 2742450Y CN 200420005431 CN200420005431 CN 200420005431 CN 200420005431 U CN200420005431 U CN 200420005431U CN 2742450 Y CN2742450 Y CN 2742450Y
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- China
- Prior art keywords
- motor vehicle
- test pencil
- vehicle maintenance
- double
- double voltage
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- Expired - Fee Related
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- 238000012423 maintenance Methods 0.000 title claims abstract description 15
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract 1
- 239000000523 sample Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 241000270722 Crocodylidae Species 0.000 description 1
- 208000033999 Device damage Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- LNNWVNGFPYWNQE-GMIGKAJZSA-N desomorphine Chemical compound C1C2=CC=C(O)C3=C2[C@]24CCN(C)[C@H]1[C@@H]2CCC[C@@H]4O3 LNNWVNGFPYWNQE-GMIGKAJZSA-N 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model relates to a double voltage motor vehicle maintenance test pencil which is applicable to test 5V voltage of a motor vehicle computer and a sensor. The double voltage motor vehicle maintenance test pencil adopts the logical combining method of light emitting diodes to display whether 5V or 12V. The utility model has the comprehensive characteristics of double direction that the polarity can both be positive or negative, double color that the positive polarity emits red light while the negative polarity emits green light and double voltage that the double voltage motor vehicle maintenance test pencil can display two voltages: 5V and 12V. Therefore, the double voltage motor vehicle maintenance test pencil can directly test some pulse signals of motor vehicles.
Description
Technical field
The purpose of this utility model provides a kind of double voltage motor vehicle maintenance test pencil, and this test pencil adopts light emitting diode combined to indicate 5 volts or 12 volts of voltages to have or not.
Background technology
The motor vehicle maintenance test pencil is simple and efficient and low-cost because of its failure judgement, and the Automobile Service industry extensively adopts, and (comprising import and Taiwan product) motor vehicle maintenance test pencil of market sale at present has following several:
1, the luminous indication of bulb (Direct/Reverse is all available, sends out with a kind of color of light, and power consumption is big)
2, common lumination of light emitting diode indication (only forward can be used, send out a kind of color of light)
3, two-way lumination of light emitting diode indication (Direct/Reverse is all available, sends out two kinds of color kind light)
4, two-way lumination of light emitting diode indication has miniature sound-producing device (function has increased news and rung function on 3 basis) simultaneously.
Because novel automobile extensively adopts computer control at present, most of computer circuits operating voltage are 5 volts, operative sensor also uses 5 volts of voltage signals, but above-mentioned these test pencils all are designed for 12 volts, the insufficiency of function that seems in new automobile maintenance has to could judge by the multimeter measuring voltage whether device damages sometimes.
Summary of the invention
Can not distinguish the defective of 12 volts or 5 volts circuit voltages in order to overcome existing motor vehicle maintenance test pencil, the purpose of this utility model provides a kind of double voltage motor vehicle maintenance test pencil, this test pencil has kept 12 volts of voltage tester functions of existing test pencil, can also indicate the duty of 5 volts of potential circuits.
The technical scheme that its technical matters that solves the utility model adopts is: adopted the voltage stepping branch road that is formed by current-limiting resistance, voltage stabilizing diode, light emitting diode serial connection in the motor vehicle maintenance test pencil, made test pencil can distinguish 12 volts or 5 volts of voltages.
The beneficial effects of the utility model are: make the service kit performance and the auto industry new technology is synchronous, simple in structure, cost is low, be convenient to produce in batches.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is the shell synoptic diagram of an embodiment of test pencil, for ease of explanation, has removed back shroud among the figure.
1. extension line holes among the figure, 2. boss (being used to locate printed circuit board (PCB)), 3. light emitting diode stretches out the hole, 4. probe.
Embodiment
Below in conjunction with accompanying drawing narration the utility model embodiment
Fig. 1 first half is two-way light emitting diode classic applications circuit, and voltage all can be luminous 3 to 12 volts of scopes, and Lower Half is a voltage stepping circuit, circuit has been connected in series voltage stabilizing diode, utilize the principle of work of stabilivolt diode, cause light emitting diode not luminous below 7 volts, 7 volts above just luminous.Two parts combination of circuits is up and down made a kind of test pencil, and the maintainer just can be from the duty and the voltage range of following logical relation judgement measured point:
00 is obstructed
015 volts
11 12 volts
Fig. 1 circuit has bidirectional characteristic, and any end both can be used as front end, also can be used as the rear end.Test pen overall characteristic with this circuit production is: two-way (can the back connect the negative pole front and survey anodally, also can the back connect anodal front and survey negative pole); Double-colored (the negative rubescent color of light in preceding positive back, the positive greening color of light in preceding negative back); Two pressures (can indicate 5 volts and 12 volts of two kinds of voltages); Can directly measure some pulse signals.Because this design is to be used for 5 volts and 12 volts of voltage conditions, when being higher than 24 volts, voltage can cause the light emitting diode overcurrent to damage, in operation instruction, to limit.
Fig. 1 circuit is welded on the printed circuit board, place in the insulation crust that is similar to Fig. 2, circuit board is carried out electric the connection in crocodile clip of rear end extension line end points welding, extension line and probe and shell, the rear end extension line is communicated with public electrode during use, probe contact measured point.
Shell can design voluntarily with hobby and material property, and Fig. 2 only is a routine design reference, and this test pencil is by producing checking in batches.
Claims (2)
1. a double voltage motor vehicle maintenance test pencil, on a shell, light emitting diode lamp is housed, there is a test contact in the place ahead, and the back has one to draw lead, it is characterized in that: adopted the voltage stepping branch road that is formed by current-limiting resistance, voltage stabilizing diode, light emitting diode serial connection.
2, test pencil is used in motor vehicles maintenance according to claim 1, it is characterized in that: added pronunciation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420005431 CN2742450Y (en) | 2004-03-02 | 2004-03-02 | Double voltage motor vehicle maintenance test pencil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420005431 CN2742450Y (en) | 2004-03-02 | 2004-03-02 | Double voltage motor vehicle maintenance test pencil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2742450Y true CN2742450Y (en) | 2005-11-23 |
Family
ID=35477918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420005431 Expired - Fee Related CN2742450Y (en) | 2004-03-02 | 2004-03-02 | Double voltage motor vehicle maintenance test pencil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2742450Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114994516A (en) * | 2022-08-03 | 2022-09-02 | 深圳市速德瑞科技有限公司 | Portable waterproof circuit pulse signal detection device |
-
2004
- 2004-03-02 CN CN 200420005431 patent/CN2742450Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114994516A (en) * | 2022-08-03 | 2022-09-02 | 深圳市速德瑞科技有限公司 | Portable waterproof circuit pulse signal detection device |
| CN114994516B (en) * | 2022-08-03 | 2022-10-11 | 深圳市速德瑞科技有限公司 | Portable waterproof circuit pulse signal detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |