a sliding rheostat
A technology of sliding rheostat and sliding block, which is applied in the direction of sliding contact resistors, etc., can solve the problems of resistance coil relaxation, unstable connection between sliding block and guide post, etc., and achieve the effects of avoiding relaxation, increasing stability, and accurate measurement results
Active Publication Date: 2021-12-17
应镇阳
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Problems solved by technology
[0005] In order to make up for the deficiencies of the prior art, to solve the problem of the looseness of the resistance coil on the resistance coil column and the unstable connection between the sliding block and the guide column, the present invention proposes a sliding rheostat
Method used
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Embodiment approach
[0028] As a specific embodiment of the present invention, the lower end of the conflicting piece 54 is provided with a strip-shaped protrusion 541 that fits into the groove 22; through the strip-shaped protrusion 541, the contact between the conflicting piece 54 and the resistance coil is realized. Precise adjustment; when in use, in order to increase the contact effect between the contact piece 54 and the resistance coil, so that the measurement result of the sliding rheostat is more accurate, a bar-shaped protrusion 541 is provided on the lower surface of the contact piece 54, and the protrusion 541 is in contact with the surface of the resistance coil At this time, the protrusion 541 can be attached to the surface of the resistance coil, which avoids the problem of poor contact between the conflicting piece 54 and the resistance coil.
[0029] As a specific embodiment of the present invention, a plurality of elliptical balls 542 are provided in the middle of the protrusion 5...
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The invention belongs to the technical field of rheostats, in particular to a sliding rheostat. The sliding rheostat includes a bracket, a resistance coil post, a guide post, a metal hoop piece and a sliding unit; the sliding unit includes a fastening bolt, a sliding block, and a No. 2 bolt , collision piece and shrapnel; the fastening bolt passes through the sliding block and extends into the cavity opened in the sliding block, the outer ring of the fastening bolt is provided with a No. 1 gear, and the left and right ends of the No. 1 gear and the upper end of the No. The No. 2 gears are meshed with each other, and the No. 2 bolt is placed with an extrusion sheet attached to the outer ring of the guide column; the front and rear ends of the sliding block are fixed with shrapnel, and the inner side of the shrapnel is attached with a conflicting sheet; through the expansion block, the No. 1 rope The cooperation with the No. 1 bolt realizes the change of the diameter of the guide post; through the sliding unit, the fastening of the sliding block on the guide post is realized.
Description
technical field [0001] The invention belongs to the technical field of rheostats, in particular to a sliding rheostat. Background technique [0002] A sliding rheostat is a circuit element that can change its own resistance by changing it, thus playing the role of controlling the circuit. In circuit analysis, a sliding rheostat can be used as either a fixed value resistor or a variable value resistor. The composition of the sliding rheostat generally includes five parts: terminal, slide, resistance wire, metal rod and porcelain cylinder. The resistance wire of the sliding rheostat is wound on the insulating porcelain cylinder, and the outside of the resistance wire is coated with insulating varnish. [0003] The sliding rheostat is one of the commonly used devices in electricity. Its working principle is to change the resistance by changing the length of the resistance wire connected to the circuit, thereby gradually changing the current in the circuit. The resistance wir...
Claims
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IPC IPC(8): H01C10/38
CPCH01C10/38
Inventor 不公告发明人
Owner 应镇阳