CN200990346Y - Change-over switch for hand held keying digital multipurpose gauge - Google Patents
Change-over switch for hand held keying digital multipurpose gauge Download PDFInfo
- Publication number
- CN200990346Y CN200990346Y CN 200620016745 CN200620016745U CN200990346Y CN 200990346 Y CN200990346 Y CN 200990346Y CN 200620016745 CN200620016745 CN 200620016745 CN 200620016745 U CN200620016745 U CN 200620016745U CN 200990346 Y CN200990346 Y CN 200990346Y
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- CN
- China
- Prior art keywords
- pole double
- switch
- latching relay
- magnetic latching
- spdt
- Prior art date
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Abstract
The utility model relates to a hand key digital multiple use chart switch, comprising a main control IC, a magnetic latching relay, two triodes, and a plurality of function keys. The two single pole double throw switches are arranged on the magnetic latching relay, and each of the single pole double throw switches are connected with the moving contact and the two breakback contacts of the main control IC. Wherein, the two breakback contacts belonging to one single pole double throw switch and one breakback contact belonging to the other switch are respectively connected with the signal input port, and wherein the other break back contact belonging to the single pole double throw switch is unoccupied. The magnetic latching relay has two loops that are responsible for controlling the moving contact belonging to the single pole double throw switch, and the two loops are connected with the one triode, and the main control IC sends out the switching signal which controls the correspondent triode and then the loops, and then the moving contact switches between the correspondent break back contact. The utility model makes use of the magnetic latching relay and has high accuracy in measurement, and wastes less electricity. The battery has long service life and can be operated by single hand.
Description
Technical field
The utility model relates to a kind of digital multimeter field, especially relates to a kind of diverter switch of hand-held button digital multimeter.
Background technology
Traditional handheld digital multimeter all adopts dial to come the handover measurement signal, realizes different measurement functions.Need bimanualness during switching: one holds multimeter, stirs dial on the other hand.And traditional handheld digital multimeter generally uses battery as power supply, and the dial table that uses traditional relay to make need be kept tens milliamperes to tens milliamperes continuous power supply always, causes battery very short useful life, and use cost is higher.
The utility model content
Technical problem to be solved in the utility model is: a kind of diverter switch of hand-held button digital multimeter is provided, and its handover operation is simple, and power consumption is little, and use cost is low.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of diverter switch of hand-held button digital multimeter, comprise a master control IC, one magnetic latching relay, two triodes and some function switch keys that links to each other with master control IC, described magnetic latching relay inside is provided with two moving contacts that are connected on the master control IC, corresponding to being provided with two fixed contacts, each moving contact constitutes single-pole double-throw switch (SPDT), a fixed contact of two fixed contacts of one of them single-pole double-throw switch (SPDT) and another single-pole double-throw switch (SPDT) is connected to corresponding signal input part, and another fixed contact of another single-pole double-throw switch (SPDT) is vacant, described magnetic latching relay has the coil of two control single-pole double-throw switch (SPDT) moving contact motions, described two coils link to each other with a triode respectively, master control IC sends switching signal, the corresponding triode of control is controlled the inner respective coil work of magnetic latching relay then, thereby the control moving contact switches between corresponding fixed contact.
Described function switch key is the function switch key that can realize circulating and switching.
Described function switch key is the combination of the function switch key of several corresponding respectively at least a measurement functions switchings.
The beneficial effects of the utility model are: the utility model adopts the signal diverter switch of magnetic latching relay, utilize the good electrical isolation characteristic of relay, extremely low contact resistance, and the minimum power consumption of magnetic latching relay, magnetic latching relay provides electric current in the time of only need switching, as long as duration is tens milliseconds, makes can reach the certainty of measurement of traditional dial table and the useful life of battery with battery as the hand-held button digital multimeter of power supply; Carry out the switching of measuring-signal, can realize one-handed performance and adopt the function switch key to replace traditional dial, simple to operate.
Description of drawings
Fig. 1 is the circuit structure diagram of the diverter switch of the hand-held button digital multimeter of the utility model.
Embodiment
As shown in Figure 1, the utility model provides a kind of diverter switch of hand-held button digital multimeter, comprises a master control IC1, a magnetic latching relay 2, two triode Q1, Q2 and some function switch keys that link to each other with master control IC.
Described function switch key can have only one, and can switch by repeatedly pressing the circulation that realizes function, thereby realizes measurement functions such as voltage, electric current, resistance, diode switching, break-make, electric capacity; Described function switch key also can for a plurality of (as shown in fig. 1 K1, K2 ... Kn), the only corresponding a kind of measurement function of each function switch key, and can realize that function switches by pressing the function corresponding switch key.Certainly, can also be between preceding two kinds of designs, the function switch key is designed to several, each function switch key is to there being one or more measurement functions, when pressing some function switch key Kn, it can realize first kind of corresponding measurement function, and when pressing this function switch key Kn once more, realizes that then the circulation of measurement function is switched.
Described magnetic latching relay 2 inside are provided with two moving contacts that are connected on the master control IC 1, corresponding to being provided with two fixed contacts, each moving contact constitutes single-pole double-throw switch (SPDT), two fixed contacts of one of them single-pole double-throw switch (SPDT) are connected to corresponding signal input part 3, and a fixed contact of another single-pole double-throw switch (SPDT) is connected on the corresponding signal input part 3, another fixed contact need not connect and be vacant, be provided with two coils in the described magnetic latching relay 2, the moving contact that can control single-pole double-throw switch (SPDT) respectively moves in the opposite direction and connects with different fixed contacts, the triode Q1 that two coils are corresponding with one respectively, Q2 links to each other, master control IC 1 sends switching signal, control two triode Q1, Q2, then control the different coil electricity in magnetic latching relay 2 inside, thereby the control moving contact switches between corresponding fixed contact.
Be that example is carried out operation instruction with structure below with two function switch key K1, K2.Suppose that function switch key K1 is the voltage function switch key, and function switch key K2 is resistance, diode, break-make, capacitive function switch key.Measure in the use concrete, when the user presses function switch key K1, promptly can send a potential pulse control signal and give triode Q1 by master control IC1, the instantaneous conducting of triode Q1, electric current flows through first coil of magnetic latching relay 2, the moving contact of two single-pole double-throw switch (SPDT)s is linked fixed contact B, D respectively, forms the voltage measurement network with master control IC1 and non-essential resistance network; And when wanting measuring resistance, diode, break-make, electric capacity, press function corresponding and switch K2, give voltage pulse signal of triode Q2 by master control IC1, the instantaneous conducting of Q2, electric current flows through second coil of magnetic latching relay 2, the moving contact of two single-pole double-throw switch (SPDT)s is linked fixed contact A, C respectively, form Measurement Network such as resistance, diode, break-make, electric capacity with master control IC1 and non-essential resistance network, continue to press K2, can realize resistance, diode, break-make, capacitive function circulation selection, this moment, magnetic latching relay 2 did not move when pressing K2 at every turn.And when pressing K1 again, master control IC1 sends control signal again and forms the voltage measurement network.
Claims (3)
1, a kind of diverter switch of hand-held button digital multimeter, comprise a master control IC, it is characterized in that: the diverter switch of described hand-held button digital multimeter also comprises a magnetic latching relay, two triodes and the function switch key that at least one links to each other with master control IC, described magnetic latching relay inside is provided with two single-pole double-throw switch (SPDT)s, each single-pole double-throw switch (SPDT) includes a moving contact and two fixed contacts that are connected on the master control IC, a fixed contact of two fixed contacts of one of them single-pole double-throw switch (SPDT) and another single-pole double-throw switch (SPDT) is connected to corresponding signal input part, and another fixed contact of another single-pole double-throw switch (SPDT) is vacant, described magnetic latching relay has the coil of two control single-pole double-throw switch (SPDT) moving contact motions, described two coils link to each other with a triode respectively, master control IC sends switching signal, the corresponding triode of control is controlled the inner respective coil work of magnetic latching relay then, thereby the control moving contact switches between corresponding fixed contact.
2, the diverter switch of a kind of hand-held button digital multimeter as claimed in claim 1 is characterized in that: described function switch key is the function switch key that can realize circulating and switching.
3, the diverter switch of a kind of hand-held button digital multimeter as claimed in claim 1 is characterized in that: described function switch key is the combination of the function switch key of several corresponding respectively at least a measurement functions switchings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620016745 CN200990346Y (en) | 2006-12-25 | 2006-12-25 | Change-over switch for hand held keying digital multipurpose gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620016745 CN200990346Y (en) | 2006-12-25 | 2006-12-25 | Change-over switch for hand held keying digital multipurpose gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200990346Y true CN200990346Y (en) | 2007-12-12 |
Family
ID=38941379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620016745 Expired - Fee Related CN200990346Y (en) | 2006-12-25 | 2006-12-25 | Change-over switch for hand held keying digital multipurpose gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200990346Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107346147A (en) * | 2017-08-31 | 2017-11-14 | 重庆亚唐科技有限公司 | Switching device with controllable single-pole double-throw switch (SPDT) and more relays |
-
2006
- 2006-12-25 CN CN 200620016745 patent/CN200990346Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107346147A (en) * | 2017-08-31 | 2017-11-14 | 重庆亚唐科技有限公司 | Switching device with controllable single-pole double-throw switch (SPDT) and more relays |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: CO-PATENTEE TO: HUANG HAILONG LI XIONGJUN ¬ |
|
| CU01 | Correction of utility model patent |
Correction item: Co-patentee Correct: Huang Hailong|Li Xiongjun Number: 50 Page: The title page Volume: 23 |
|
| CU03 | Correction of utility model patent gazette |
Correction item: Co-patentee Correct: Huang Hailong|Li Xiongjun Number: 50 Volume: 23 |
|
| ERR | Gazette correction |
Free format text: CORRECT: CO-PATENTEE; FROM: NONE ¬ TO: HUANG HAILONG LI XIONGJUN ¬ |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071212 Termination date: 20151225 |
|
| EXPY | Termination of patent right or utility model |