CN202720980U - Slide wire resistor - Google Patents
Slide wire resistor Download PDFInfo
- Publication number
- CN202720980U CN202720980U CN 201220379977 CN201220379977U CN202720980U CN 202720980 U CN202720980 U CN 202720980U CN 201220379977 CN201220379977 CN 201220379977 CN 201220379977 U CN201220379977 U CN 201220379977U CN 202720980 U CN202720980 U CN 202720980U
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- China
- Prior art keywords
- resistance
- contact wheel
- guide rail
- slide
- wire layer
- 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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Abstract
The utility model discloses a slide wire resistor which comprises a resistance wire layer and a guide rail. A sliding rod is arranged on a guide rail, a contact wheel is arranged at the lower end of the sliding rod, the contact wheel is matched with the resistance wire layer, and the guide rail, the sliding rod and the contact wheel are in electric connection. Preferably, the edge of the contact wheel is in a sharp conical shape. The slide wire resistor has the advantages of being long in service life and high in resistance value variation precision.
Description
Technical field
The present invention relates to the electronic component technology field, especially relate to a kind of slide wire resistance.
Background technology
Slide wire resistance is electronic devices and components commonly used in laboratory and the electric power system.General, slide wire resistance comprises earthenware and guide rail, and is wound with the resistance wire layer on the earthenware, guide rail is provided with slide block.Like this, by the displacement of slide block on the resistance wire layer, the variation of resistance between the terminal that the terminal that the realization guide rail connects and resistance wire layer connect.Its defective is: slide block is connected close contact to be realized connecting with the resistance wire layer, and serious wear between the two causes slide wire resistance to use birthday noodle to reduce.Therefore be necessary to be improved.
Summary of the invention
Deficiency for above-mentioned prior art exists the purpose of this invention is to provide a kind of slide wire resistance, and it has long characteristics in useful life.
To achieve these goals, the technical solution adopted in the present invention is: slide wire resistance comprises resistance wire layer and guide rail, described guide rail is provided with slide bar, the slide bar lower end is provided with contact wheel, and this contact wheel and resistance wire layer match, and guide rail, slide bar, contact wheel are electrically connected.
The edge of described contact wheel is sharp cone distal.
After adopting said structure, the present invention is compared with existing technology the advantage that has and is: 1, slide wire resistance uses mission longer.Slide wire resistance of the present invention is realized the variation of resistance by the displacement of contact wheel on the resistance wire layer.Obviously, the wearing and tearing between contact wheel and the resistance wire layer are minimum, thereby effectively prolonged the useful life of slide wire resistance.2, the change in resistance precision is higher.The edge of contact wheel is cone-shaped, and like this, the contact area between contact wheel and the resistance wire layer is minimum, thereby can accurately control the variation of resistance.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples:
Fig. 1 is the front view of embodiments of the invention;
Fig. 2 is that A-A of Fig. 1 is to view.
Among the figure: 10, resistance wire layer; 20, guide rail; 30, slide bar; 40, contact wheel.
Embodiment
The following stated only is preferred embodiment of the present invention, does not therefore limit protection scope of the present invention.
Embodiment, see illustrated in figures 1 and 2: slide wire resistance, comprise resistance wire layer 10 and guide rail 20, certainly, resistance wire layer 10 and guide rail 20 are connected with respectively binding post.Wherein, guide rail 20 is provided with slide bar 30, and slide bar 30 lower ends are provided with contact wheel 40, and this contact wheel 40 and resistance wire layer 10 match.That is, the edge of contact wheel 40 and resistance wire layer 10 close contact, thereby the electrical connection of realization contact wheel 40 and resistance wire layer 10.Simultaneously, guide rail 20, slide bar 30, contact wheel 40 are electrically connected.Certainly, slide bar 30 is non-rotatable with respect to guide rail 20.Like this, along with contact wheel 40 in the realization displacement that resistance wire layer 10 rolls, the resistance between the binding post that resistance wire layer 10 and guide rail 20 connect is respectively changed.Because contact wheel 40 rolls at resistance wire layer 10, thereby the wearing and tearing between the two are minimum.
Optimize, the edge of contact wheel 40 is sharp cone distal.Like this, improved the change in resistance precision of slide wire resistance.
Claims (2)
1. slide wire resistance, comprise resistance wire layer (10) and guide rail (20), it is characterized in that: described guide rail (20) is provided with slide bar (30), slide bar (30) lower end is provided with contact wheel (40), this contact wheel (40) and resistance wire layer (10) match, and guide rail (20), slide bar (30), contact wheel (40) are electrically connected.
2. slide wire resistance according to claim 1, it is characterized in that: the edge of described contact wheel (40) is sharp cone distal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220379977 CN202720980U (en) | 2012-08-02 | 2012-08-02 | Slide wire resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220379977 CN202720980U (en) | 2012-08-02 | 2012-08-02 | Slide wire resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202720980U true CN202720980U (en) | 2013-02-06 |
Family
ID=47622794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220379977 Expired - Fee Related CN202720980U (en) | 2012-08-02 | 2012-08-02 | Slide wire resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202720980U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105976956A (en) * | 2016-07-17 | 2016-09-28 | 王思睿 | Experimental slide rheostat |
-
2012
- 2012-08-02 CN CN 201220379977 patent/CN202720980U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105976956A (en) * | 2016-07-17 | 2016-09-28 | 王思睿 | Experimental slide rheostat |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130206 Termination date: 20130802 |