Linear resistor

Abstract

The utility model provides a linear resistor which comprises a hollow aluminum shell, insulation supporting sheets are uniformly arranged in the aluminum shell, a resistance wire is arranged in the aluminum shell in a snake shape, the resistance wire is arranged in the insulation supporting sheets in a penetrating mode, the resistance wire is provided with a first connector and a second connector which extend to the outer side of the aluminum shell, and the first connector is connected with the second connector. The aluminum shell is filled with quartz sand; according to the utility model, a certain distance is kept between the resistance wire and the aluminum shell through the supporting effect of the uniformly arranged insulating supporting sheets on the resistance wire in the aluminum shell, and the resistance wire cannot be in contact with the aluminum shell due to the supporting effect of the insulating supporting sheets when the resistance wire is loosened, so that electric leakage is avoided, and potential safety hazards are reduced; and the normal use of the resistor is ensured.

Description

Technical Field

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

[0002] The current of a linear resistor is proportional to the voltage. The volt-ampere characteristic curve is a straight line passing through the origin of the coordinate system. The ratio of voltage to current is called resistance. Some current linear resistors are manufactured using aluminum shell packaging, with heat dissipation grooves on the surface, which has a good heat dissipation effect.

[0003] In the prior art, a Chinese utility model patent document with authorization announcement number CN219418634U discloses a trapezoidal aluminum shell resistor, which limits the position of the resistance wire by evenly opening limit grooves on both sides of the mica plate, thereby limiting the distance between adjacent resistance wire loops and ensuring heat dissipation efficiency. However, the distance between the two sides of the inner side of the aluminum shell and the resistance wire is relatively close. After the resistance wire is loosened by heat, it is easy to contact with the aluminum shell to cause leakage, which poses a hidden danger and affects the resistance value of the resistor.

[0004] Therefore, it is necessary to design a linear resistor that can provide stable support between the resistance wire and the aluminum shell to avoid contact and leakage between the two to solve the current technical problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the utility model provides a linear resistor which can provide stable support between a resistance wire and an aluminum shell to avoid contact between the two and leakage.

[0006] The technical solution of the utility model is: a linear resistor, comprising a hollow aluminum shell, an insulating support sheet is evenly arranged inside the aluminum shell, a resistance wire is serpentinely arranged inside the aluminum shell, the resistance wire is passed through the insulating support sheet, the resistance wire has a first joint and a second joint extending to the outside of the aluminum shell, and the aluminum shell is filled with quartz sand.

[0007] The insulating support sheet is in a rectangular plate structure, a bottom slot matching the insulating support sheet is provided inside the aluminum shell, side slots matching the insulating support sheet are provided on both sides of the interior of the aluminum shell, and the insulating support sheet is inserted into the bottom slot and the side slot.

[0008] A bending support piece is arranged on the insulating support sheet corresponding to the bending position of the resistance wire, and the resistance wire is arranged inside the bending support piece.

[0009] The bending support member has a support body fixedly arranged on one side of the insulating support sheet, the support body is a semicircular plate structure, and a mounting groove matching the bending part of the resistance wire is opened on the support body.

[0010] A first insulating blocking piece and a second insulating blocking piece are respectively disposed at two ends of the interior of the aluminum shell, and the first insulating blocking piece and the second insulating blocking piece are both bonded and fixed to the inner side of the aluminum shell.

[0011] The insulating support sheet, the first insulating blocking sheet and the second insulating blocking sheet are all plate structures made of mica material.

[0012] Two insulating sleeves are fixedly arranged at one end of the aluminum shell, and the first joint and the second joint are respectively led outward from the inside of the two insulating sleeves to the outside of the aluminum shell.

[0013] The outer side of the aluminum shell is evenly provided with heat dissipation fins, and the heat dissipation fins and the aluminum shell are an integrated structure.

[0014] Beneficial effects of the utility model: In the utility model, the interior of the aluminum shell supports the resistance wire through the evenly arranged insulating support sheets, so that a certain distance is maintained between the resistance wire and the aluminum shell. When the resistance wire is loose, it will not contact with the aluminum shell due to the supporting effect of the insulating support sheets, thus avoiding leakage, reducing safety hazards, and ensuring the normal use of the resistor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the external structure of the linear resistor in the utility model.

[0016] Figure 2 It is a schematic diagram of the internal structure of the linear resistor in the utility model.

[0017] Figure 3 It is a schematic diagram of the structure of the resistance wire and the insulating support sheet in the utility model.

[0018] Figure 4 for Figure 3 Cross-section view at AA in the middle.

[0019] Figure 5 for Figure 4 A partial enlarged view of point B in the middle. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] like Figures 1 to 3 As shown, the linear resistor includes a hollow aluminum shell 1, the interior of the aluminum shell 1 is evenly provided with insulating support sheets 5, the interior of the aluminum shell 1 is serpentinely provided with a resistance wire 2, the resistance wire 2 is inserted in the insulating support sheet 7, the resistance wire 2 has a first joint 21 and a second joint 22 extending to the outside of the aluminum shell 1, and the interior of the aluminum shell 1 is filled with quartz sand; in this embodiment, the interior of the aluminum shell 1 supports the resistance wire 2 through the evenly arranged insulating support sheets 5, so that a certain distance is maintained between the resistance wire 2 and the aluminum shell 1, and when the resistance wire 2 is loose, it will not contact the aluminum shell 1 due to the supporting effect of the insulating support sheet 5, thereby avoiding leakage, reducing safety hazards, and ensuring the normal use of the resistor; the interior of the aluminum shell 1 is filled with quartz sand, which has excellent properties such as high temperature stability, electrical insulation and chemical corrosion resistance, and plays a role in stabilizing the resistance value of the aluminum shell 1 resistor.

[0023] In some embodiments, as a specific factual manner in which the insulating support sheet 3 is arranged inside the aluminum shell 1, the insulating support sheet 3 is in a rectangular plate structure, the interior of the aluminum shell 1 is provided with a bottom slot 12 matching the insulating support sheet 3, and the interior of the aluminum shell 1 is provided with side slots 13 matching the insulating support sheet 3 on both sides, the insulating support sheet 3 is inserted into the bottom slot 12 and the side slot 13, and the insulating support sheet 3 is supported and fixed by the bottom slot 12 and the side slot 13, and a through hole is opened on the insulating support sheet 3 for the resistance wire 2 to pass through.

[0024] In some embodiments, Figures 2 to 5As shown, a bending support member 6 is provided on the insulating support sheet 3 corresponding to the bending portion of the resistance wire 2 , and the resistance wire 2 is arranged inside the bending support member 6 , and the bending support member 6 is used to provide support for the bending portion of the resistance wire 2 .

[0025] In some embodiments, the bending support member 3 has a support body 61 fixedly arranged on one side of the insulating support sheet 3. The support body 61 is a semicircular plate structure. An installation groove 62 matching the bending part of the resistance wire 2 is opened on the support body 61. The installation groove 62 is centrally opened on one side of the arc-shaped support body 61. The support body 61 fits with the bent resistance wire 2 to provide stable support for it.

[0026] In some embodiments, Figure 2 As shown, a first insulating baffle 4 and a second insulating baffle 5 are respectively provided at both ends of the interior of the aluminum shell 1. The first insulating baffle 4 and the second insulating baffle 5 are both bonded and fixed to the inner side of the aluminum shell. The first insulating baffle 4 and the second insulating baffle 5 are used to prevent the bending part of the resistance wire 2 from directly contacting the aluminum shell 1.

[0027] In some embodiments, as a more specific implementation of the insulating support sheet 3, the first insulating baffle 4 and the second insulating baffle 5, the insulating support sheet 3, the first insulating baffle 4 and the second insulating baffle 5 are all plate structures made of mica. Mica is a rock-forming mineral with a hexagonal flaky crystal shape and is one of the main rock-forming minerals. The characteristics of mica are insulation and high temperature resistance. The most commonly used in industry is sericite, which is widely used in coatings, paints, electrical insulation and other industries.

[0028] In some embodiments, two insulating sleeves 7 are fixedly provided at one end of the aluminum shell 1, and the first joint 21 and the second joint 22 are respectively led outward from the inside of the two insulating sleeves 7 to the outside of the aluminum shell 1; the insulating sleeve 7 is used to support the first joint 21 and the second joint 22, and at the same time prevent the first joint 21 and the second joint 22 from being conductive with the aluminum shell 1; specifically, the insulating sleeve 7 is made of insulating materials such as ceramics.

[0029] In some embodiments, heat dissipation fins 11 are evenly arranged on the outside of the aluminum shell 1. The heat dissipation fins 11 and the aluminum shell 1 are an integrated aluminum structure. The arrangement of the heat dissipation fins 11 can increase the contact area between the aluminum shell 1 and the external air and improve the heat dissipation effect.

[0030] 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.

[0031] 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 linear resistor, characterized in that: It comprises a hollow aluminum shell, wherein an insulating support sheet is evenly arranged inside the aluminum shell, a resistance wire is serpentinely arranged inside the aluminum shell, the resistance wire is passed through the insulating support sheet, the resistance wire has a first joint and a second joint extending to the outside of the aluminum shell, and the aluminum shell is filled with quartz sand.

2. The linear resistor according to claim 1, characterized in that: The insulating support sheet is in a rectangular plate structure, a bottom slot matching the insulating support sheet is provided inside the aluminum shell, side slots matching the insulating support sheet are provided on both sides of the interior of the aluminum shell, and the insulating support sheet is inserted into the bottom slot and the side slot.

3. The linear resistor according to claim 1, characterized in that: A bending support piece is arranged on the insulating support sheet corresponding to the bending position of the resistance wire, and the resistance wire is arranged inside the bending support piece.

4. The linear resistor according to claim 3, characterized in that: The bending support member has a support body fixedly arranged on one side of the insulating support sheet, the support body is a semicircular plate structure, and a mounting groove matching the bending part of the resistance wire is opened on the support body.

5. The linear resistor according to claim 1, characterized in that: A first insulating blocking piece and a second insulating blocking piece are respectively disposed at two ends of the interior of the aluminum shell, and the first insulating blocking piece and the second insulating blocking piece are both bonded and fixed to the inner side of the aluminum shell.

6. The linear resistor according to claim 5, characterized in that: The insulating support sheet, the first insulating blocking sheet and the second insulating blocking sheet are all plate structures made of mica material.

7. The linear resistor according to claim 1, characterized in that: Two insulating sleeves are fixedly arranged at one end of the aluminum shell, and the first joint and the second joint are respectively led outward from the inside of the two insulating sleeves to the outside of the aluminum shell.

8. The linear resistor according to claim 1, characterized in that: The outer side of the aluminum shell is evenly provided with heat dissipation fins, and the heat dissipation fins and the aluminum shell are an integrated structure.

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