CN210667952U - Improved slide wire rheostat - Google Patents
Improved slide wire rheostat Download PDFInfo
- Publication number
- CN210667952U CN210667952U CN201920937255.9U CN201920937255U CN210667952U CN 210667952 U CN210667952 U CN 210667952U CN 201920937255 U CN201920937255 U CN 201920937255U CN 210667952 U CN210667952 U CN 210667952U
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- China
- Prior art keywords
- hollow cylinder
- slide
- resistance coil
- sliding
- magnet
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Abstract
The utility model discloses an improvement type slide-wire rheostat, including resistance coil, hollow cylinder, support, slide bar, slider, terminal first, terminal second, still include magnet piece, magnet strip. The magnet piece is fixed in the position that metal gleitbretter surface and slider contact correspond, and the magnet strip pastes the position of locating on the hollow cylinder internal surface and corresponding with the exposed area of resistance coil, is equipped with the heat dissipation through-hole on the hollow cylinder. The utility model discloses be favorable to overcoming traditional slide-wire rheostat's shortcoming, reinforcing slide-wire rheostat circuit connection's reliability, extension slide-wire rheostat life.
Description
Technical Field
The utility model belongs to the technical field of electricity experimental device, a slide-wire rheostat is related to, specifically an improvement type slide-wire rheostat is provided.
Background
The slide rheostat is a commonly used circuit component, generally comprising a resistance coil wound on a porcelain cylinder, a metal slide rod arranged above the resistance coil, a slide head capable of sliding along the surfaces of the metal slide rod and the resistance coil, a binding post and the like, and can change the size of an access resistor by moving the position of the slide head, thereby playing the role of controlling a circuit, such as voltage division, current limitation and the like. A slide rheostat is commonly used in the electronic experiments such as the measurement of the current-voltage characteristic of the diode.
After the traditional slide-wire rheostat is used for a period of time, faults are often generated between the sliding head and the resistance coil due to poor contact, so that a circuit is not connected or is disconnected when being connected, and therefore the electricity experiment is influenced. In addition, when the current flowing through the slide rheostat is large and the service life is long, the resistance coil is easily overheated to cause accidents.
Disclosure of Invention
The utility model aims at overcoming traditional slide-wire varistor and producing shortcoming such as contact failure easily, developing an improvement type slide-wire varistor.
In order to solve the technical problem, the utility model adopts the following technical proposal that the improved slide rheostat comprises a resistance coil, a hollow cylinder, a bracket, a slide bar, a slide head, a binding post A and a binding post B; two ends of the hollow cylinder are fixed on the support, the resistance coil is uniformly wound on the hollow cylinder, two ends of the resistance coil are respectively connected with the wiring terminal A and the wiring terminal B, and the surface of the resistance coil is provided with an exposed belt of the resistance coil along the length direction of the hollow cylinder; the sliding rod is erected above the resistance coil along the length direction of the hollow cylinder, two ends of the sliding rod are fixedly connected with the support, the sliding head is movably arranged on the sliding rod and can slide along the sliding rod, an elastic metal sliding sheet is arranged below the sliding head, a contact is arranged on the metal sliding sheet and is contacted with the exposed belt, and when the sliding head slides along the sliding rod, the contact synchronously slides along the exposed belt; still include magnet piece, magnet strip, the magnet piece is fixed in the position that the metal gleitbretter surface corresponds with the contact, the magnet strip pastes and locates the position that corresponds with exposed area on the hollow cylinder internal surface, and magnet piece and magnet strip attract each other through the magnetism of self, will be located between magnet piece and the magnet strip the contact sticiss on the exposed area.
The hollow cylinder is made of hard electric insulating materials, and a heat dissipation through hole is formed in the hollow cylinder.
Due to the design above the adoption, the utility model discloses can produce following beneficial effect: the magnetic attraction between the magnet pieces and the magnet strips is utilized to tightly press the metal sliding sheet contact between the magnet pieces and the magnet strips on the exposed belt, so that the effective contact between the contact and the exposed belt can be ensured. The heat dissipation through holes in the hollow cylinder are favorable for heat dissipation of the resistance coil. The utility model discloses be favorable to overcoming traditional slide-wire rheostat's shortcoming, the reliability of reinforcing slide-wire rheostat circuit connection is favorable to increase of service life.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
Fig. 1 is a schematic view of the present invention.
Fig. 2 is a side view of the structural relationship between the hollow cylinder, the resistance coil, and the slider.
Fig. 3 is a schematic view of a hollow cylinder.
In the figure: 1. the resistance coil, 2, the hollow cylinder, 3, the support, 4, the slide bar, 5, the slide head, 51, the metal slide sheet, 52, the contact, 53, the magnet sheet, 54, the resistance indication arrow, 6, the binding post A, 7, the binding post B, 9, the resistance scale, 10, the magnet strip, 11, the exposed belt, 12, the heat dissipation through hole.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1 and referring to fig. 2, two ends of a hollow cylinder 2 are fixed on a support 3, a resistance coil 1 is uniformly wound on the hollow cylinder 2, two ends of the resistance coil 1 are respectively connected with a binding post a 6 and a binding post b 7, and an exposed belt 11 is arranged on the surface of the resistance coil 1 along the length direction of the hollow cylinder 2. The sliding rod 4 is erected above the resistance coil 1, two ends of the sliding rod 4 are fixedly connected with the support 3, the sliding head 5 is movably arranged on the sliding rod 4 and can slide back and forth along the sliding rod 4, a metal sliding sheet 51 is arranged below the sliding head 5, a contact 52 is arranged on the metal sliding sheet 51, the contact 52 is in contact with the exposed belt 11, and when the sliding head 5 slides along the sliding rod 4, the contact 52 slides synchronously along the exposed belt 11. The magnet piece 53 is fixed at a position corresponding to the contact 52 on the surface of the metal slide piece 51, the magnet strip 10 is attached to a position corresponding to the exposed strip 11 on the inner surface of the hollow cylinder 2, and the magnet piece 53 and the magnet strip 10 are attracted to each other by the magnetic force thereof.
The hollow cylinder 2 is made of a hard electrically insulating material, and referring to fig. 3, the hollow cylinder 2 is provided with a heat dissipation through hole 12 to enhance heat dissipation. In order to ensure a good contact between the contacts 52 and the bare strip 11, no heat dissipating through-holes 12 are provided at the corresponding positions of the hollow cylinder 2 below the bare strip 11.
Referring to fig. 1, a resistance scale 9 is arranged on the slide rheostat along the length direction of the hollow cylinder 2, two ends of the resistance scale 9 are fixed on the bracket 3, a resistance indicating arrow 54 is arranged below the contact 52 on the sliding head 5, and the resistance indicating arrow 54 indicates the size of the access resistance.
Claims (2)
1. An improved slide rheostat comprises a resistance coil, a hollow cylinder, a support, a slide rod, a slide head, a binding post A and a binding post B; two ends of the hollow cylinder are fixed on the support, the resistance coil is uniformly wound on the hollow cylinder, two ends of the resistance coil are respectively connected with the wiring terminal A and the wiring terminal B, and the surface of the resistance coil is provided with an exposed belt of the resistance coil along the length direction of the hollow cylinder; the sliding rod is erected above the resistance coil along the length direction of the hollow cylinder, two ends of the sliding rod are fixedly connected with the support, the sliding head is movably arranged on the sliding rod and can slide along the sliding rod, an elastic metal sliding sheet is arranged below the sliding head, a contact is arranged on the metal sliding sheet and is contacted with the exposed belt, and when the sliding head slides along the sliding rod, the contact synchronously slides along the exposed belt; the method is characterized in that: the magnetic iron sheet also comprises a magnet piece and a magnet strip; the magnet piece is fixed in the position that metal gleitbretter surface and contact correspond, the magnet strip pastes and locates the position that corresponds with exposed area on the hollow cylinder internal surface, and magnet piece and magnet strip are through the magnetic attraction of self, will be located between magnet piece and the magnet strip the contact sticiss on the exposed area.
2. An improved slide rheostat according to claim 1, wherein: the hollow cylinder is made of hard electric insulating materials, and a heat dissipation through hole is formed in the hollow cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920937255.9U CN210667952U (en) | 2019-06-21 | 2019-06-21 | Improved slide wire rheostat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920937255.9U CN210667952U (en) | 2019-06-21 | 2019-06-21 | Improved slide wire rheostat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210667952U true CN210667952U (en) | 2020-06-02 |
Family
ID=70820986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920937255.9U Expired - Fee Related CN210667952U (en) | 2019-06-21 | 2019-06-21 | Improved slide wire rheostat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210667952U (en) |
-
2019
- 2019-06-21 CN CN201920937255.9U patent/CN210667952U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200602 Termination date: 20210621 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |