A kind of high-precision slide rheostatTechnical field
The utility model relates to technical field of motors, is specially a kind of high-precision slide rheostat.
Background technology
Slide rheostat is a critical elements in circuit, it can change self resistance by the position of mobile slide plate, thus play the effect of control circuit, in circuit analysis, slide rheostat both can as a fixed value resistance, also can as a resistance-changing resistor, in the learning process of electrophysics, slide-wire rheostat haves much room for improvement in fine setting, slide rheostat can change the resistance be connected in circuit by continuous print, regulating resistance is very convenient, but slide rheostat can not read the resistance be connected in circuit, bring some inconvenience to experiment and study.
Utility model content
The purpose of this utility model is to provide a kind of high-precision slide rheostat, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme: a kind of high-precision slide rheostat, comprise sliding bar, fixed head, porcelain cylinder, measurement mechanism and resistance wire, it is characterized in that: described sliding bar two ends are connected and fixed nut through sliding tray, the button that slides is provided with in the middle of described sliding bar, slide plate is installed in described slip buckle back portion, described porcelain cylinder is left, right two ends are all connected with fixed head, described fixed head right-hand member is provided with sliding tray, the positive right side of face of described fixed head is respectively equipped with binding post and slide switch, described porcelain cylinder intermediate surface is wound around resistance wire, described resistance wire two ends connect binding post respectively, location hole is provided with between described resistance wire and slide plate, described location hole two ends are connected and fixed plate respectively, described measurement mechanism top is connected by support bar with bottom fixed head, described measurement mechanism two ends are all connected with negative terminal and positive terminal.
Preferably, described fixed head front and sliding bar surface are equipped with ruler, and graduated scale one side is marked with resistance value.
Preferably, described location hole is provided with many registration hole, and described slide plate connects through location hole and connects resistance wire, and the middle part of slide plate is set with insulating case.
Preferably, described porcelain cylinder is set to square-column-shaped.
Preferably, oxide-film insulating barrier has been crossed on described resistance wire surface, and described fixed head, slip are detained and supported and be insulator.
Compared with prior art; the beneficial effects of the utility model are: this high-precision slide rheostat, and between resistance wire and slidable adjustment parts, the position of joint is provided with location hole, and is provided with graduated scale; be convenient to accurate adjusting resistance value; arrange the resistance value that measurement mechanism can be convenient to read slide rheostat place in circuit, simple and clear, resistance wire is provided with anodized insulation layer; can effectively play water proof and dust proof effect; protective resistance silk, is quick on the draw, long service life.
Accompanying drawing explanation
Fig. 1 is the utility model front schematic view;
Fig. 2 is the utility model vertical view;
Fig. 3 is schematic diagram on the left of the utility model.
In figure: 1 sliding bar, 2 slip buttons, 3 fixed heads, 4 hold-down nuts, 5 porcelain cylinders, 6 binding posts, 7 positive terminals, 8 negative terminals, 9 measurement mechanisms, 10 location holes, 11 slide plates, 12 resistance wires, 13 slide switches, 14 support bars, 15 sliding trays.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making other embodiments all obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1-3, the utility model provides a kind of technical scheme: a kind of high-precision slide rheostat, comprise sliding bar 1, fixed head 3, porcelain cylinder 5, measurement mechanism 9 and resistance wire 12, sliding bar 1 two ends are connected and fixed nut 4 through sliding tray 15, slip button 2 is provided with in the middle of sliding bar 1, slide plate 11 is installed at slip button 2 back, porcelain cylinder 5 is left, right two ends are all connected with fixed head 3, described fixed head 3 right-hand member is provided with sliding tray 15, the positive right side of face of described fixed head 3 is respectively equipped with binding post 6 and slide switch 13, porcelain cylinder 5 intermediate surface is wound around resistance wire 12, resistance wire 12 two ends connect binding post 6 respectively, location hole 10 is provided with between resistance wire 12 and slide plate 11, location hole 10 two ends are connected and fixed plate 3 respectively, measurement mechanism 9 top is connected by support bar 14 with bottom fixed head 3, measurement mechanism 9 two ends are all connected with negative terminal 8 and positive terminal 7, the resistance value that measurement mechanism 9 can be convenient to read slide rheostat place in circuit is set, fixed head 3 front and sliding bar 1 surface are equipped with ruler, and graduated scale one side is marked with resistance value, simple and clear, be convenient to accurate adjusting resistance value, location hole 10 is provided with multiple connecting hole, slide plate 11 connects resistance wire 12 through location hole 10, and the middle part of slide plate 11 is set with insulating case, porcelain cylinder 5 is set to square-column-shaped, resistance wire 12 has crossed oxide-film insulating barrier, fixed head 3, slip button 2 is insulator with supporting, can effectively play water proof and dust proof effect, protective resistance silk 12, be quick on the draw, long service life, in use procedure, during to be used in regulating circuit current strength, should by the present invention's series connection in circuit, and first by resistance adjustment at maximum place, then to connect with the mains, then regulate slip button 2, reduce resistance gradually, make current strength be increased to suitable current strength gradually.To be used for the voltage of point-to-point transmission in regulating circuit time, should by the present invention and circuit in parallel, and first by resistance adjustment to minimum value place, then to connect with the mains, then regulate slip button 2, increase resistance gradually, make the position that the voltage at circuit two ends increases gradually and is applicable to.
Although illustrate and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and spirit, scope of the present utility model is by claims and equivalents thereof.