CN201465693U

CN201465693U - Adjustable cement resistor

Info

Publication number: CN201465693U
Application number: CN200920133223XU
Authority: CN
Inventors: 郭淼
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-06-23
Filing date: 2009-06-23
Publication date: 2010-05-12
Anticipated expiration: 2019-06-23

Abstract

The utility model discloses a resistance-adjustable cement resistor, which comprises a resistance line whose two ends are respectively provided with a lead-out electric terminal, at least a lead-out electric terminal is arranged between two ends of the resistance line, and adjacent electric terminals are electrically connected through a relative outer switch. The adjustable cement resistor reduce the resistance value of a fixed resistance through partial resistance value of a short-circuit fixed resistance, and restores the original resistance value through an open circuit.

Description

Adjustable cement resistor device

Technical field

The utility model relates to resistive element, specifically is the adjustable cement resistor device of a kind of resistance value.

Background technology

Cement resistor be with resistive conductor on no alkaline heat resisting porcelain spare, that the outside adds is heat-resisting, moisture-proof and corrosion-resistant material protection are fixing and the wire resistor body is put into square porcelain frame, is sealed to form with the filling of special noninflammability thermal cement.The outside of cement resistor mainly is a ceramic material.Cement resistor is generally used for the occasion that power is big, electric current is big, and 2W, 3W, 5W, 10W even bigger power are arranged, and as air-conditioning, in the electrical equipment of television set constant power more than hectowatt grade, all can use cement resistor basically.The cement resistor device of prior art substantially all is a fixed resistance value, does not have the resistance regulatory function.

The utility model content

At above-mentioned technical problem, the utility model aims to provide the cement resistor device that a kind of resistance can be regulated.

A kind of adjustable cement resistor device of the present utility model, comprise resistive conductor, power connection end of drawing respectively is set at described resistive conductor two ends, between described resistive conductor two ends, be provided with power connection end that at least one is drawn, all pass through corresponding external switch between adjacent power connection end and be electrically connected.

Adopt the cement resistor of this programme, realize the minimizing of fixed resistance resistance, recover the original resistance of resistance by open circuit by the part resistance of short circuit fixed resistance; And can reach a plurality of resistance values; When realizing that change in resistance is regulated, also realized resistance scale recognition function intuitively; Easy to use easy in batches.

Description of drawings

Fig. 1 is the terminal schematic diagram of one of the utility model specific embodiment.

Fig. 2 is the schematic diagram of one of the utility model specific embodiment.

Fig. 3 is the use schematic diagram one of one of the utility model specific embodiment.

Fig. 4 is the use schematic diagram two of one of the utility model specific embodiment.

Fig. 5 is the use schematic diagram three of one of the utility model specific embodiment.

Embodiment

As shown in Figure 1, be one of embodiment of the present utility model, wherein 1,5 is the fixed resistances of setting, draw corresponding power connection end, between adjacent power connection end, be electrically connected with switch, as shown in Figure 2, change in resistance by between the switch realization 1-5 between control 2-3,3-4, the 4-5 reaches the purpose of this utility model.

The variation principle of resistance is " short circuit " controllable portion, makes its resistance for being approximately 0 ohm, reaches the control requirement." open circuit " control section is realized with respect to the change in resistance under " short circuit " state.

Fig. 1 is the signal part of one of embodiment of the present utility model, and in the specific implementation, the utility model also comprises power connection end of other quantity, realizes the resistance adjustment needs of different numerical value.

Describe utilization of the present utility model in detail below in conjunction with Fig. 3 to Fig. 5.

Suppose that the cement resistor of this specific embodiment is 20 ohm, wherein the 1-2 section is assumed to be 14 ohm; 2-3,3-4,4-5 are set at 2 ohm respectively.

So:

Shown in Figure 2, when 2-3,3-4,4-5 open circuit, the cement resistor of this specific embodiment is 20 ohm.

Shown in Figure 3,2-3,3-4 open circuit, during the 4-5 short circuit, the cement resistor of this specific embodiment is 18 ohm.

Shown in Figure 4, the 2-3 open circuit, when 3-4,4-5 short circuit, the cement resistor of this specific embodiment is 16 ohm.

Shown in Figure 5, when 2-3,3-4,4-5 short circuit, the cement resistor of this specific embodiment is 14 ohm.

Claims

1. adjustable cement resistor device, comprise resistive conductor, it is characterized in that respectively being provided with power connection end of drawing at described resistive conductor two ends, between described resistive conductor two ends, be provided with power connection end that at least one is drawn, all pass through corresponding external switch between adjacent power connection end and be electrically connected.