Combined resistor

Abstract

The utility model discloses a combined resistor which comprises a shell, a resistor disc and an insulating spacer block, a switch element, a first binding post and a second binding post are arranged on the outer side of the shell, and the first end of the switch element is connected with the first binding post; the resistor discs are arranged in the shell at intervals in a layered mode, the resistor discs of the adjacent odd layers are connected end to end to form a first resistor assembly, and the resistor discs of the adjacent even layers are connected end to end to form a second resistor assembly; one end of the first resistor assembly is connected with the first end of the switch element, the other end of the first resistor assembly is connected with the second binding post, one end of the second resistor assembly is connected with the second end of the switch element, and the other end of the second resistor assembly is connected with the second binding post; a plurality of insulating spacer blocks are arranged, the insulating spacer blocks are arranged between each layer of resistor discs and the adjacent layer of resistor discs, and the width of the insulating spacer blocks is smaller than that of the resistor discs. According to the invention, the resistance value can be flexibly adjusted, and the heat dissipation performance is good.

Description

Technical Field

[0001] This application relates to the technical field of electronic devices, and particularly to a combined resistor. Background Art

[0002] In the design of electronic circuits, resistors are indispensable components, used to limit current, divide voltage, generate heat, or serve as the load of other circuit components. However, traditional resistors often have a single function and are difficult to meet the flexible adjustment requirements of complex circuits for multiple resistance values. Resistors with a single resistance value often seem inadequate. In addition, when traditional resistors are used under extreme working conditions such as high power and high current, there are often problems such as poor heat dissipation and easy damage. Utility Model Content

[0003] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application provides a combined resistor that can flexibly adjust the resistance value and has good heat dissipation performance.

[0004] In a first aspect, this application provides a combined resistor, including:

[0005] A housing, on the outer side of which there are a switch element, a first terminal, and a second terminal. The first end of the switch element is connected to the first terminal;

[0006] A plurality of resistor sheets, which are arranged in layers at intervals inside the housing. The resistor sheets of adjacent odd layers are connected end to end to form a first resistor assembly, and the resistor sheets of adjacent even layers are connected end to end to form a second resistor assembly; One end of the first resistor assembly is connected to the first end of the switch element, the other end of the first resistor assembly is connected to the second terminal, one end of the second resistor assembly is connected to the second end of the switch element, and the other end of the second resistor assembly is connected to the second terminal;

[0007] A plurality of insulating spacers, and an insulating spacer is provided between each layer of resistor sheet and the adjacent layer of resistor sheet. The width of the insulating spacer is smaller than the width of the resistor sheet.

[0008] The combined resistor according to the embodiment of the first aspect of the present application has at least the following beneficial effects: The resistor chips are arranged in the housing. The housing serves as the external protection structure of the resistor and can protect the resistor chips. The resistor chips are arranged in several numbers and are spaced and layered in the housing to form a multi-layer resistor network. At the same time, the resistor chips of adjacent odd layers are connected end to end to form a first resistor component, and the resistor chips of adjacent even layers are connected end to end to form a second resistor component. The insulating spacer blocks are arranged between each layer of resistor chips and the adjacent layer of resistor chips to ensure electrical isolation between the resistor chips and prevent current from flowing between non-adjacent resistor chips. In addition, the width of the insulating spacer block is smaller than the width of the resistor chip, so that while ensuring electrical isolation, the influence on the heat dissipation performance of the resistor chip can be minimized. The switching element is the key component for controlling the change of the resistance value. The first end of the switching element is connected to the first terminal, and the second end is connected to the second resistor component. When the combined resistor is connected to the external circuit through the first terminal and the second terminal, when the switching element is disconnected, it is equivalent to the first resistor component being separately connected to the external circuit. When the switching element is closed, it is equivalent to the first resistor component and the second resistor component being connected in parallel to the external resistor. Through the switching element, the flexibility and practicality of the resistor are improved.

[0009] According to some embodiments of the first aspect of the present application, the resistor chip has a serpentine structure.

[0010] According to some embodiments of the first aspect of the present application, two insulating spacer blocks are arranged between each layer of resistor chips and the adjacent layer of resistor chips, and the two insulating spacer blocks are respectively located at the edge positions on both sides of the corresponding resistor chip.

[0011] According to some embodiments of the first aspect of the present application, first connection holes are provided at both ends of the resistor chip. The resistor chips of adjacent odd layers and the resistor chips of adjacent even layers are connected end to end through metal sheets, and second connection holes corresponding to the first connection holes are respectively provided at both ends of the metal sheet.

[0012] According to some embodiments of the first aspect of the present application, the first connection holes on the same side of the resistor chips of adjacent layers are staggeredly distributed, and the first connection holes on the same side of the resistor chips of odd layers are located on the same vertical line, and the first connection holes on the same side of the resistor chips of even layers are located on the same vertical line.

[0013] According to some embodiments of the first aspect of the present application, the housing includes a top plate, a bottom plate and a plurality of support columns. The top plate and the bottom plate are connected by the plurality of support columns, and the resistor chips and the insulating spacer blocks are arranged between the top plate and the bottom plate.

[0014] According to some embodiments of the first aspect of the present application, the housing includes two first side plates, which are respectively arranged on opposite sides of the top plate and the bottom plate, and the surface of the first side plate is parallel to the width direction of the resistance sheet. A plurality of air inlet holes are provided on one of the first side plates, and a plurality of heat dissipation fans are provided on the other first side plate.

[0015] According to some embodiments of the first aspect of the present application, a handle is provided on the first side plate where the heat dissipation fan is provided.

[0016] According to some embodiments of the first aspect of the present application, the switching element is arranged on the first side plate where the heat dissipation fan is provided, and the first terminal and the second terminal are arranged on the first side plate where the air inlet holes are provided.

[0017] According to some embodiments of the first aspect of the present application, the housing includes two second side plates, which are respectively arranged on the other opposite sides of the top plate and the bottom plate, and the surface of the second side plate is parallel to the length direction of the resistance sheet.

[0018] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present application. Description of the Drawings

[0019] The additional aspects and advantages of the present application will become apparent and be easily understood in conjunction with the following description of the embodiments with reference to the accompanying drawings, in which:

[0020] Figure 1 is a schematic structural diagram of a combined resistor provided by some embodiments of the present application;

[0021] Figure 2 is a schematic structural diagram of a combined resistor (removing the housing) provided by some embodiments of the present application;

[0022] Figure 3 is a schematic structural diagram of a combined resistor (removing the housing) from another perspective provided by some embodiments of the present application;

[0023] Figure 4 is a schematic structural diagram of a resistance sheet and an insulating spacer provided by some embodiments of the present application;

[0024] Figure 5 is an equivalent circuit diagram of a combined resistor provided by some embodiments of the present application.

[0025] The reference numerals in the drawings are as follows:

[0026] Housing 100; Switch element 101; First terminal 102; Second terminal 103; Top plate 110; Bottom plate 120; Support column 130; First side plate 140; Air inlet hole 141; Cooling fan 142; Handle 143; Second side plate 150; Resistance sheet 200; First resistance component 201; Second resistance component 202; First connection hole 210; Metal sheet 220; Second connection hole 221; Insulating spacer 300. Detailed implementation mode

[0027] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and should not be construed as a limitation of the present application.

[0028] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0029] In the description of the present application, if the first and second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0030] In the description of the present application, unless otherwise clearly defined, terms such as setting, installation, connection, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present application in combination with the specific content of the technical solution.

[0031] In electronic circuit design, resistors are indispensable components, used to limit current, divide voltage, generate heat, or act as a load for other circuit components. However, traditional resistors often have a single function and are difficult to meet the flexible adjustment of various resistance value requirements in complex circuits. Resistors with a single resistance value often seem inadequate. In addition, when traditional resistors are dealing with extreme working conditions such as high power and high current, there are often problems such as poor heat dissipation and easy damage.

[0032] Based on this, the present application provides a combined resistor to solve the above-mentioned technical problems. The technical solutions proposed in the present application will be described in detail one by one below.

[0033] Refer to Figures 1 to 5, this application provides a combined resistor, comprising: a housing 100, resistor chips 200 and insulating spacers 300. A switching element 101, a first terminal 102 and a second terminal 103 are provided on the outer side of the housing 100. The first end of the switching element 101 is connected to the first terminal 102; A plurality of resistor chips 200 are provided and are arranged in the housing 100 at intervals in layers. The resistor chips 200 of adjacent odd layers are connected end to end to form a first resistor assembly 201, and the resistor chips 200 of adjacent even layers are connected end to end to form a second resistor assembly 202; One end of the first resistor assembly 201 is connected to the first end of the switching element 101, the other end of the first resistor assembly 201 is connected to the second terminal 103, one end of the second resistor assembly 202 is connected to the second end of the switching element 101, and the other end of the second resistor assembly 202 is connected to the second terminal 103; A plurality of insulating spacers 300 are provided, and an insulating spacer 300 is provided between each layer of resistor chips 200 and the adjacent layer of resistor chips 200. The width of the insulating spacer 300 is smaller than the width of the resistor chip 200.

[0034] The resistor chips 200 are arranged in the housing 100. The housing 100 serves as an external protection structure of the resistor and can protect the resistor chips 200. The resistor chips 200 are provided in several numbers and are arranged in the housing 100 at intervals in layers to form a multi-layer resistor network. At the same time, the resistor chips 200 of adjacent odd layers are connected end to end to form a first resistor assembly 201, and the resistor chips 200 of adjacent even layers are connected end to end to form a second resistor assembly 202. The insulating spacers 300 are provided between each layer of resistor chips 200 and the adjacent layer of resistor chips 200 to ensure electrical isolation between the resistor chips 200 and prevent current from flowing between non-adjacent resistor chips 200. In addition, the width of the insulating spacer 300 is smaller than the width of the resistor chip 200, so that while ensuring electrical isolation, the influence on the heat dissipation performance of the resistor chips 200 can be minimized. The switching element 101 is a key component for controlling the change of the resistance value. The first end of the switching element 101 is connected to the first terminal 102, and the second end is connected to the second resistor assembly 202. When this combined resistor is connected to an external circuit through the first terminal 102 and the second terminal 103, when the switching element 101 is disconnected, it is equivalent to the first resistor assembly 201 being separately connected to the external circuit. When the switching element 101 is closed, it is equivalent to the first resistor assembly 201 and the second resistor assembly 202 being connected in parallel to the external resistor. Through the switching element 101, the flexibility and practicality of the resistor are improved.

[0035] Referring to Figure 4 , it can be understood that the resistor chip 200 has a serpentine structure. The serpentine structure can increase the resistance value without increasing the overall size and under the same material and cross-sectional area by increasing the length of the resistor chip 200, so as to be able to adapt to a high-power working environment.

[0036] Referring to Figures 2 to 4 , it can be understood that there are two insulating spacers 300 between each layer of resistor chips 200 and the adjacent layer of resistor chips 200, and the two insulating spacers 300 are respectively located at the edges on both sides of the corresponding resistor chip 200. The two insulating spacers 300 provide stable support for the resistor chip 200, ensuring that the resistor chip 200 remains flat in the housing 100 and is not prone to deformation or displacement, thereby ensuring the stability and accuracy of the resistance value. At the same time, the insulating spacer 300 effectively isolates the resistor chips 200 of adjacent layers, avoiding direct contact between the resistor chips 200, reducing the safety risks caused by short circuits or leakage, and improving the safety of the resistor. In addition, since the insulating spacers 300 are located at the edges on both sides of the resistor chip 200, a hollowed-out area is formed between them, providing additional heat dissipation space for the resistor chip 200, enabling the heat generated by the resistor chip 200 during operation to be dissipated into the air more quickly, and reducing the temperature rise of the resistor.

[0037] Referring to Figure 3 and Figure 4 , it can be understood that first connection holes 210 are provided at both ends of the resistor chip 200, and the resistor chips 200 of adjacent odd layers and the resistor chips 200 of adjacent even layers are connected end to end through metal sheets 220. Second connection holes 221 corresponding to the first connection holes 210 are respectively provided at both ends of the metal sheet 220. By connecting the metal sheet 220 with the first connection holes 210 and the second connection holes 221 on the resistor chip 200, it can be ensured that the connection between the resistor chips 200 is firm and reliable, not prone to loosening or falling off, and since the metal sheet 220 is an independent connecting piece, it can be disassembled or replaced without replacing the entire resistor.

[0038] Continuing to refer to Figure 3 and Figure 4 , it can be understood that the first connection holes 210 on the same side of adjacent layers of resistor chips 200 are staggeredly distributed, and the first connection holes 210 on the same side of the resistor chips 200 of odd layers are located on the same vertical line, and the first connection holes 210 on the same side of the resistor chips 200 of even layers are located on the same vertical line. The first connection holes 210 of the resistor chips 200 of odd layers and even layers are respectively located on their respective same vertical lines. This design makes the wiring more flexible and orderly, and at the same time can reduce the cross-interference of current or signals in the vertical direction, reduce possible noise or distortion, and improve the performance stability of the resistor.

[0039] Referring to Figure 1 and Figure 2, It can be understood that the housing 100 includes a top plate 110, a bottom plate 120, and a plurality of support columns 130. The top plate 110 and the bottom plate 120 are connected by the plurality of support columns 130, and the resistor sheet 200 and the insulating spacer 300 are disposed between the top plate 110 and the bottom plate 120. The structure formed by the top plate 110, the bottom plate 120, and the support columns 130 provides a stable support environment for the resistor sheet 200 and the insulating spacer 300, and at the same time allows good air circulation, which helps to dissipate the internal heat.

[0040] Refer to Figure 2 and Figure 3 , It can be understood that the housing 100 includes two first side plates 140. The two first side plates 140 are respectively disposed on opposite sides of the top plate 110 and the bottom plate 120, and the surface of the first side plate 140 is parallel to the width direction of the resistor sheet 200. A plurality of air inlet holes 141 are provided on one of the first side plates 140, and a plurality of cooling fans 142 are provided on the other first side plate 140. By providing the air inlet holes 141 on one of the first side plates 140 and the cooling fans 142 on the other first side plate 140, an effective air convection can be formed, thereby enhancing the heat dissipation performance of the resistor. The cooling fan 142 can quickly discharge the internal heat, while the air inlet holes 141 allow the external cold air to enter, realizing the rapid heat exchange, which helps to reduce the working temperature of the resistor and ensure the stability and reliability of the resistor in a high-temperature environment.

[0041] Refer to Figure 2 , It can be understood that a handle 143 is provided on the first side plate 140 provided with the cooling fan 142. The presence of the handle 143 makes it more convenient to move or carry the combined resistor. Whether moving the combined resistor from one position to another or carrying it in scenarios such as maintenance and component replacement, the handle 143 can provide a convenient gripping point, reducing the operation difficulty and labor intensity, and at the same time facilitating the pushing and pulling of the combined resistor on the rack.

[0042] Refer to Figure 1 and Figure 2 , It can be understood that the switching element 101 is disposed on the first side plate 140 provided with the cooling fan 142, and the first terminal 102 and the second terminal 103 are disposed on the first side plate 140 provided with the air inlet holes 141.

[0043] Refer to Figure 1, It can be understood that the housing 100 includes two second side plates 150, which are respectively arranged on the other two opposite sides of the top plate 110 and the bottom plate 120, and the surfaces of the second side plates 150 are parallel to the length direction of the resistor chip 200. The two second side plates 150 further enhance the integrity of the housing 100, provide more comprehensive protection for the resistor chip 200 and the insulating spacer 300, and can prevent external dust, moisture, chemicals, etc. from entering the interior of the housing 100 and affecting the performance and lifespan of the resistor. At the same time, the second side plates 150 can enhance the structural stability of the entire resistor and can prevent the resistor from being deformed or damaged to a certain extent when subjected to external force impacts or vibrations.

[0044] The embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present application.

Claims

1. A combined resistor, characterized in that: include: A housing, wherein a switch element, a first terminal and a second terminal are disposed on the outer side of the housing, and a first end of the switch element is connected to the first terminal; Resistor sheets, wherein a plurality of resistor sheets are provided and arranged in layers at intervals in the housing, the resistor sheets of adjacent odd-numbered layers are connected end to end to form a first resistor assembly, and the resistor sheets of adjacent even-numbered layers are connected end to end to form a second resistor assembly; one end of the first resistor assembly is connected to the first end of the switch element, and the other end of the first resistor assembly is connected to the second terminal, one end of the second resistor assembly is connected to the second end of the switch element, and the other end of the second resistor assembly is connected to the second terminal; Insulating spacers, wherein a plurality of insulating spacers are provided, and insulating spacers are provided between each layer of the resistor sheets and the resistor sheets of the adjacent layer, and the width of the insulating spacers is smaller than the width of the resistor sheets.

2. The combined resistor according to claim 1, characterized in that: The resistor sheet has a serpentine structure.

3. The combined resistor according to claim 1, characterized in that: Two insulating spacers are arranged between each layer of the resistor sheets and the resistor sheets in the adjacent layer, and the two insulating spacers are respectively located at the edges of the two sides of the resistor sheets.

4. The combined resistor according to claim 1, characterized in that: The resistor sheets are provided with first connection holes at both ends, the resistor sheets of adjacent odd-numbered layers and the resistor sheets of adjacent even-numbered layers are connected end to end through metal sheets, and the metal sheets are provided with second connection holes corresponding to the first connection holes at both ends.

5. The combined resistor according to claim 4, characterized in that: The first connection holes on the same side of the resistor sheets in adjacent layers are staggered, and the first connection holes on the same side of the resistor sheets in odd layers are located on the same vertical line, and the first connection holes on the same side of the resistor sheets in even layers are located on the same vertical line.

6. The combined resistor according to claim 1, characterized in that: The shell comprises a top plate, a bottom plate and a plurality of supporting columns, the top plate and the bottom plate are connected via the plurality of supporting columns, and the resistor sheet and the insulating spacer are arranged between the top plate and the bottom plate.

7. The combined resistor according to claim 6, characterized in that: The shell includes two first side panels, which are respectively arranged on opposite sides of the top plate and the bottom plate, and the surfaces of the first side panels are parallel to the width direction of the resistor sheet, one of the first side panels is provided with a plurality of air inlet holes, and the other first side panel is provided with a plurality of cooling fans.

8. The combined resistor according to claim 7, characterized in that: A handle is provided on the first side panel where the heat dissipation fan is provided.

9. The combined resistor according to claim 7, characterized in that: The switch element is arranged on the first side plate provided with the heat dissipation fan, and the first terminal and the second terminal are arranged on the first side plate provided with the air inlet hole.

10. The combined resistor according to claim 7, characterized in that: The housing includes two second side plates, which are respectively arranged on the other two sides of the top plate and the bottom plate, and the surfaces of the second side plates are parallel to the length direction of the resistor.

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