Filamentous resistor element

Abstract

The utility model relates to a filamentous resistor element, which comprises a resistance wire uniformly wound into an oblate ring at intervals, a pair of insulating plates uniformly provided with tooth-shaped notches on the side edges, and connecting pieces fixed at the two ends of the two insulating plates, the resistance wire is assembled on the outer sides of the two insulating plates, and one side, provided with the tooth-shaped notches, of each insulating plate is matched with the resistance wire. Compared with the prior art, the utility model has the advantages that the structure is simple and compact, the assembly is easy, porcelain teeth and bonding procedures are omitted, the cost is obviously reduced, and the structure is not limited by the original winding wire diameter, so that the problem that the insulating plate is damaged due to the fact that the insulating plate cannot bear the wire bending force is avoided, and the reliability and durability of the wire-shaped element are improved.

Description

Technical Field

[0001] This utility model belongs to the field of resistor technology and relates to a wire-shaped resistor element. Background Technology

[0002] With the rapid development of global consumer electronics, communications, automotive, and computer industries, the demands on resistors are constantly increasing. Existing wire resistor manufacturing technologies typically involve winding resistance wires onto ceramic teeth, using the toothed structure of the teeth to separate the wires and form a resistive element. However, this technology has some drawbacks. It requires bonding the ceramic teeth to an insulating board before winding, and it imposes significant limitations on the wire diameter, especially when the wire diameter is greater than 1.2 mm. During winding, the insulating board cannot withstand the bending force of the wire, easily leading to damage. Therefore, providing a wire resistor element with a simple, compact structure and easy assembly has become an important research topic for those skilled in the art. Utility Model Content

[0003] The purpose of this invention is to overcome the defects of the prior art and provide a wire-shaped resistance element. By prefabricating the resistance wire, processing toothed notches on the insulating plate, and then fixing the resistance wire to the insulating plate by an elastic limiting assembly method, the limitation on wire diameter during the winding process is solved.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] This utility model provides a wire-like resistive element, including a resistance wire wound into a flat circular ring shape at uniform intervals, a pair of insulating plates with uniformly toothed notches on the sides, and a connector fixed at both ends of the two insulating plates. The resistance wire is assembled on the outside of the two insulating plates, and a ring of resistance wire is limited in each toothed notch.

[0006] Preferably, the resistance wire is a nickel-chromium alloy.

[0007] Preferably, the diameter of the resistance wire is 0.8 to 1.5 mm, the width of the bottom of the toothed notch is 1 to 1.7 mm, and the wire diameter is smaller than the width of the bottom of the toothed notch.

[0008] Preferably, the longitudinal dimension of the flat circular ring formed by the resistance wire is 150-250 mm, and the transverse dimension is 300-750 mm.

[0009] Furthermore, the resistance wire is provided with connectors at both ends.

[0010] Preferably, the insulating board is a mica board.

[0011] Preferably, the toothed notches on the first insulating plate and the second insulating plate are arranged opposite to each other, the distance between the two bottoms of the toothed notches is 140-240mm, the distance between the two tops of the toothed notches is 150-250mm, and the longitudinal dimension of the flat circular ring formed by the resistance wire is greater than the distance between the two bottoms of the toothed notches.

[0012] Preferably, the distance between the two adjacent sides of the two insulating boards is 50-150mm, which allows the heat of the resistance wire to dissipate quickly, thereby avoiding the problem of heat stagnation in the insulation board.

[0013] Furthermore, the connector has an L-shaped structure with a circular hole in the middle. This circular hole can serve as a fixing hole for the resistor element. After stacking, multiple resistor elements can be connected. The top of the L-shaped structure has a protruding lug. The lugs of the two connectors are oriented in opposite directions and are used for connecting the resistor elements.

[0014] Furthermore, each connector is fixedly connected to the second insulating plate by two screws, and each connector is fixedly connected to the first insulating plate by three rivets.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] (1) This utility model has a simple and compact structure and is easy to assemble by prefabricating resistance wire and processing toothed notches on the insulating board. It eliminates the need for porcelain teeth and bonding processes, thus achieving a significant reduction in cost. Moreover, this structure is not limited by the original winding wire diameter and can adapt to a wider range of wire diameters, thereby avoiding the problem of the insulating board being damaged due to the inability to withstand the bending force of the wire and improving the reliability and durability of the wire resistance element.

[0017] (2) The two insulating boards of this utility model have uniform gaps on their adjacent sides. Since the gaps promote the air permeability of the insulating boards, the heat generated by the resistance wire wound on the insulating boards can be quickly dissipated to the outside of the insulating boards, thereby avoiding the problem of heat retention on the insulating boards and greatly improving the heat dissipation effect of the wire resistor. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the filament resistor provided by this utility model.

[0019] Explanation of markings in the diagram:

[0020] 1-Resistance wire, 2-First insulating plate, 3-Second insulating plate, 4-Connector, 5-Circular hole, 6-Hanging lug. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Unless otherwise specified, the functional components or structures in the following embodiments or examples are conventional components or structures used in the art to achieve the corresponding functions.

[0025] Example 1

[0026] Please see Figure 1 This utility model provides a wire-like resistive element, including a resistance wire 1 wound into a flat circular ring shape at uniform intervals, a pair of insulating plates with uniformly toothed notches on the sides, and a connector 4 fixed at both ends of the two insulating plates. The resistance wire 1 is assembled on the outside of the two insulating plates, and a ring of resistance wire 1 is limited in each toothed notch.

[0027] The resistance wire 1 is a nickel-chromium alloy.

[0028] The resistance wire 1 has a wire diameter of 1 mm, and the width of the bottom of the toothed notch is 1.2 mm. The wire diameter is smaller than the width of the bottom of the toothed notch.

[0029] The resistance wire 1 is wound into a flat circular ring with a longitudinal dimension of 150mm and a transverse dimension of 500mm.

[0030] The resistance wire 1 has connectors at both ends for connecting multiple resistive elements together.

[0031] The insulating board is a mica board.

[0032] The toothed notches on the first insulating plate 2 and the second insulating plate 3 on the insulating plate are arranged opposite each other. The distance between the two bottoms of the toothed notches is 140mm, and the distance between the two tops of the toothed notches is 150mm. The longitudinal dimension of the flat circular ring formed by the resistance wire 1 is greater than the distance between the two bottoms of the toothed notches.

[0033] The two insulating plates are parallel and in the same position, with a 50mm gap between the two adjacent sides of the two insulating plates to facilitate heat dissipation of the resistance wire 1.

[0034] The connector 4 has an L-shaped structure, with a circular hole 5 in the middle and a protruding lug 6 at the top. The lugs 6 of the two connectors 4 are in opposite directions.

[0035] Each connector 4 is fixedly connected to the second insulating plate 3 by two screws, and each connector 4 is fixedly connected to the first insulating plate 2 by three rivets.

[0036] The fabrication process of the filamentary resistor element in this embodiment is as follows:

[0037] (1) Select a nickel-chromium alloy according to the resistance parameters, and pre-wind the resistance wire 1 into a flat circular ring;

[0038] (2) Mica board is selected as high temperature resistant insulation material, and toothed notches are uniformly machined on one side of the first insulation board 2 and the second insulation board 3.

[0039] (3) The resistance wire 1 is elastically and limitedly assembled on the outside of the two insulating plates. A ring of resistance wire 1 is limited in each toothed notch. The two insulating plates are fixedly connected at both ends with connectors 4 to obtain a wire-shaped resistance element.

[0040] In use, the filamentary resistor element in this embodiment is used in resistors with large resistance and small current. Multiple resistor elements are combined and connected to form a finished resistor, which can then be used conveniently and easily.

[0041] It should be noted that the elastic limiting assembly allows the resistance wire 1 to have a certain elastic deformation space when subjected to external force, which can achieve precise control and fixation of the position of the resistance wire 1 without damaging it.

[0042] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A wire-shaped resistive element, characterized in that, It includes a resistance wire (1) wound into a flat circular ring at uniform intervals, a pair of insulating plates with uniformly toothed notches on the sides, and a connector (4) fixed at both ends of the two insulating plates. The resistance wire (1) is assembled on the outside of the two insulating plates, and a ring of resistance wire (1) is limited in each toothed notch.

2. The wire-shaped resistive element according to claim 1, characterized in that, The resistance wire (1) is a nickel-chromium alloy.

3. The wire-shaped resistive element according to claim 1, characterized in that, The diameter of the resistance wire (1) is 0.8 to 1.5 mm, and the width of the bottom of the toothed notch is 1 to 1.7 mm. The diameter of the wire is smaller than the width of the bottom of the toothed notch.

4. A wire-shaped resistive element according to claim 1, characterized in that, The longitudinal dimension of the flat circular ring formed by the resistance wire (1) is 150-250 mm, and the transverse dimension is 300-750 mm.

5. A wire-shaped resistive element according to claim 1, characterized in that, The resistance wire (1) has connectors at both ends.

6. A wire-shaped resistive element according to claim 1, characterized in that, The insulating board is a mica board.

7. A wire-shaped resistive element according to claim 1, characterized in that, The toothed notches on the first insulating plate (2) and the second insulating plate (3) are arranged opposite each other. The distance between the two groove bottoms of the toothed notch is 140-240mm, and the distance between the two tooth tops of the toothed notch is 150-250mm. The longitudinal dimension of the flat circular ring formed by the resistance wire (1) is greater than the distance between the two groove bottoms of the toothed notch.

8. A wire-shaped resistive element according to claim 1, characterized in that, The two insulating boards are parallel and in the same position, with a distance of 50-150mm between the two adjacent sides.

9. A wire-shaped resistive element according to claim 1, characterized in that, The connector (4) has an L-shaped structure, with a circular hole (5) in the middle and a protruding lug (6) at the top. The lugs (6) of the two connectors (4) are in opposite directions.

10. A wire-shaped resistive element according to claim 1, characterized in that, Each connector (4) is fixedly connected to the second insulating plate (3) by two screws, and each connector (4) is fixedly connected to the first insulating plate (2) by three rivets.

Images