Spiral resistor

Abstract

The utility model provides a spiral resistor which comprises a framework with a cylindrical structure, a first electrode plate and a second electrode plate are respectively sleeved at two ends of the framework, and a resistance tape is arranged on the outer side of the framework between the first electrode plate and the second electrode plate. Two auxiliary electrode plates communicated with the resistance tape are arranged on the framework between the first electrode plate and the second electrode plate in a sleeving manner, conductive fins are concentrically arranged on the auxiliary electrode plates in a staggered manner, and a first insulating ring is arranged between the first electrode plate and one end of the resistance tape; the second electrode slice is communicated with the other end of the resistance tape, the end part of the framework is rotationally sleeved with a conducting ring which is in contact with the first insulating ring, and the conducting ring is provided with a conducting plate strip which is matched with the conducting fin; the resistance value can be adjusted, different resistance value requirements are met, and the application range is widened.

Description

Technical Field

[0001] The utility model belongs to the technical field of resistors, and specifically designs a spiral resistor. Background Art

[0002] The resistance wire in the spiral resistor is spirally wound on the outside of the resistor frame, wherein the resistance wire can also adopt a sheet-like plate alloy sheet spiral structure. For example, in the prior art, the Chinese utility model patent document with the authorization announcement number CN208208456U discloses a spiral chopper resistor, which includes a ceramic tube frame, a spiral groove is axially provided on the outer periphery of the ceramic tube frame, and a resistance band is embedded in the spiral groove; electrode sheets are welded at both ends of the resistance band, and the electrode sheets are sleeved on the ceramic tube frame. Since the length of the resistance band between the two electrode sheets is fixed, the resistance value of the resistor is fixed, and the resistance value cannot be adjusted according to actual needs, and the scope of use is limited.

[0003] Therefore, it is necessary to design a spiral resistor that can adjust the resistance value, meet different resistance requirements, and improve the scope of application to solve the current technical problems. Summary of the invention

[0004] In view of the deficiencies in the prior art, the utility model provides a spiral resistor capable of adjusting resistance to meet different resistance requirements and improve the scope of application.

[0005] The technical solution of the utility model is: a spiral resistor, comprising a skeleton of a tubular structure, wherein the two ends of the skeleton are respectively fitted with a first electrode sheet and a second electrode sheet, a resistance band is arranged on the outer side of the skeleton between the first electrode sheet and the second electrode sheet, two auxiliary electrode sheets connected with the resistance band are fitted on the skeleton between the first electrode sheet and the second electrode sheet, conductive fins are concentrically and staggeredly arranged on the auxiliary electrode sheets, a first insulating ring is arranged between the first electrode sheet and one end of the resistance band, the second electrode sheet is connected with the other end of the resistance band, and a conductive ring in contact with the first insulating ring is rotatably fitted on the end of the skeleton, and a conductive strip matching the conductive fin is arranged on the conductive ring.

[0006] Both ends of the conductive slats are fixedly provided with slat supports, and end covers matching the ends of the skeleton are fixedly provided on the slat supports. The conductive ring is fixedly provided on one side of one of the end covers, and the two end covers are detachably fixedly connected by a bolt and nut mechanism.

[0007] The conductive fin is an arc-shaped plate body concentric with the frame, the inner side of the conductive fin is connected with the auxiliary electrode sheet to form an integral structure, and the conductive strip is an arc-shaped strip matching the conductive fin.

[0008] A spiral groove is formed on the outer side of the frame, and the resistance belt is arranged inside the spiral groove.

[0009] A second insulating ring is sleeved on the outer side of the framework between the second electrode sheet and the end cover.

[0010] The first insulating ring and the second insulating ring are both rubber insulating rings.

[0011] The resistance belt is a nickel-chromium alloy resistance belt.

[0012] The skeleton is a ceramic tube.

[0013] Beneficial effects of the utility model: In the utility model, the first electrode sheet is connected with the conductive strip through the conductive ring, and the conductive strip can be contacted and connected with the conductive fins on different auxiliary electrode sheets as needed. Since there are differences in the lengths of the resistance bands between different auxiliary electrode sheets and the second electrode sheet, resistance bands of different lengths can be connected, and the resistance value can be adjusted to meet different resistance value requirements, thereby improving the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is one of the structural schematic diagrams of the spiral resistor in the utility model.

[0015] Figure 2 This is the second structural schematic diagram of the spiral resistor in the utility model. DETAILED DESCRIPTION

[0016] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is by no means intended to limit the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0017] The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0018] like Figure 1 and 2 As shown, the spiral resistor comprises a frame 1 of a tubular structure, a first electrode sheet 2 and a second electrode sheet 3 are respectively mounted on both ends of the frame 1, a resistance belt 12 is arranged outside the frame 1 between the first electrode sheet 2 and the second electrode sheet 3, two auxiliary electrode sheets 4 connected to the resistance belt 12 are mounted on the frame 1 between the first electrode sheet 2 and the second electrode sheet 3, conductive fins 41 are concentrically and staggeredly arranged on the auxiliary electrode sheet 4, a first insulating ring 5 is arranged between the first electrode sheet 2 and one end of the resistance belt 12, the second electrode sheet 3 is connected to the other end of the resistance belt 12, and the frame 1 is provided with a plurality of conductive fins 41 disposed on the auxiliary electrode sheet 4. The end rotating sleeve is provided with a conductive ring 7 which contacts the first insulating ring 5, and a conductive strip 8 which matches the conductive fin 41 is provided on the conductive ring 7; in the present embodiment, the first electrode sheet 2 is conducted through the conductive ring 7 and the conductive strip 8, and the conductive strip 8 can be in contact and conducted with the conductive fins 41 on different auxiliary electrode sheets 4 as required. Since there are differences in the lengths of the resistance bands 12 between different auxiliary electrode sheets 4 and the second electrode sheet 3, resistance bands 12 of different lengths can be connected, and the resistance value can be adjusted to meet different resistance value requirements and improve the scope of application.

[0019] In some embodiments, both ends of the conductive strip 8 are fixedly provided with a strip support 81, and an end cap 82 matching the end of the skeleton 1 is fixedly provided on the strip support 81, and a cylindrical protrusion is fixedly provided on one side of the end cap 82 close to the end of the skeleton 1, and the cylindrical protrusion is embedded in the interior of the skeleton 1 to achieve positioning between the end cap 82 and the skeleton 1, and the conductive ring 7 is fixedly provided on one side of an end cap 82, and the two end caps 82 are detachably fixedly connected by a bolt and nut mechanism 9. Pressure is applied between the two end caps by the bolt and nut mechanism 9 to fix the end cap 82 at the end of the skeleton 1, and the bolt and nut structure 9 is released to rotate the end cap 82 to drive the conductive strip 8 to move and contact the conductive fins 41 of different auxiliary electrode sheets 4, thereby achieving conduction between the auxiliary electrode sheets 4 and the conductive strip 8.

[0020] In some embodiments, the conductive fin 41 is an arc-shaped plate concentric with the skeleton 1, the inner side of the conductive fin 41 is connected to the auxiliary electrode sheet 4 to form an integrated structure, the conductive strip 8 is an arc-shaped strip matching the conductive fin 41, and the conductive fin 41 and the conductive strip 8 are in surface contact.

[0021] In some embodiments, a spiral groove 11 is opened on the outside of the skeleton 1, and the resistance belt 12 is arranged inside the spiral groove 11. The spiral groove 11 provides isolation support for the resistance belt 12 to ensure that the resistance belt 12 is evenly distributed on the outside of the skeleton 1 and avoid short circuit at the resistance belt 12.

[0022] In some embodiments, a second insulating ring 6 is sleeved on the outer side of the skeleton 1 between the second electrode sheet 3 and the end cover 82 ; the first insulating ring 5 and the second insulating ring 6 are both rubber insulating rings, which have a higher friction coefficient and can improve the stability of the end cover 82 fixation.

[0023] In some embodiments, more specifically, the resistance band 12 is a nickel-chromium alloy resistance band; the frame 1 is a ceramic tube; the first electrode sheet 2, the second electrode sheet 3, the conductive strip 8, the conductive ring 7 and the auxiliary electrode sheet 4 are all made of metal copper.

[0024] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0025] The above-mentioned embodiments only express some implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A spiral resistor, characterized in that: It comprises a skeleton of a tubular structure, wherein a first electrode sheet and a second electrode sheet are respectively mounted on both ends of the skeleton, a resistance band is arranged on the outer side of the skeleton between the first electrode sheet and the second electrode sheet, two auxiliary electrode sheets connected with the resistance band are mounted on the skeleton between the first electrode sheet and the second electrode sheet, conductive fins are concentrically and staggeredly arranged on the auxiliary electrode sheets, a first insulating ring is arranged between the first electrode sheet and one end of the resistance band, the second electrode sheet is connected with the other end of the resistance band, a conductive ring contacting with the first insulating ring is rotatably mounted on the end of the skeleton, and a conductive strip matching with the conductive fin is arranged on the conductive ring.

2. The spiral resistor according to claim 1, characterized in that: Both ends of the conductive slats are fixedly provided with slat supports, and end covers matching the ends of the skeleton are fixedly provided on the slat supports. The conductive ring is fixedly provided on one side of one of the end covers, and the two end covers are detachably fixedly connected by a bolt and nut mechanism.

3. The spiral resistor according to claim 1, characterized in that: The conductive fin is an arc-shaped plate body concentric with the frame, the inner side of the conductive fin is connected with the auxiliary electrode sheet to form an integral structure, and the conductive strip is an arc-shaped strip matching the conductive fin.

4. The spiral resistor according to claim 1, characterized in that: A spiral groove is formed on the outer side of the frame, and the resistance belt is arranged inside the spiral groove.

5. The spiral resistor according to claim 2, characterized in that: A second insulating ring is sleeved on the outer side of the framework between the second electrode sheet and the end cover.

6. The spiral resistor according to claim 5, characterized in that: The first insulating ring and the second insulating ring are both rubber insulating rings.

7. The spiral resistor according to claim 1, characterized in that: The resistance belt is a nickel-chromium alloy resistance belt.

8. The spiral resistor according to claim 1, characterized in that: The skeleton is a ceramic tube.

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