An adjustable resistor

Abstract

The utility model discloses an adjustable resistor, including casing, first connecting portion, second connecting portion, sliding element and external connection line, wherein, the casing inside is provided with multiple resistance bodies of different resistance value and interval arrangement along the front -back direction, and the second connecting portion is equipped with multiple connecting bodies of interval distribution along the longitudinal direction and corresponding connection each resistance body, and sliding element is slidably installed in casing along the longitudinal direction and can select and with one connecting body corresponding connection. In the utility model, through sliding element sliding selection connection different connecting body, can switch in the resistance body of circuit fast, realizes the sectional type accurate regulation of resistance value, solved the problem of traditional sliding type resistor regulation inaccuracy, and simultaneously need not to dismount casing or manual replacement resistance body, only through simple sliding action completes the regulation, and the operation process is greatly simplified, and the use convenience is improved.

Description

Technical Field

[0001] This utility model relates to the field of resistor technology, specifically to an adjustable resistor. Background Technology

[0002] Existing adjustable resistors typically achieve resistance adjustment through sliding contact or by replacing the resistor element. However, sliding resistors are limited by the continuity of contact sliding and mechanical precision, making it difficult to achieve precise segmented resistance adjustment. This can lead to signal errors or circuit instability in electronic circuits requiring precise resistance values. Removable resistor elements, on the other hand, require frequent disassembly and replacement, which is cumbersome and time-consuming. Furthermore, repeated disassembly can cause loose connections and poor contact, affecting the resistor's lifespan and reliability. Therefore, balancing the precision of resistance adjustment with ease of operation is a problem that urgently needs to be solved by existing technologies. Utility Model Content

[0003] The present invention aims to provide an adjustable resistor that is easy to adjust and has a more precise resistance value.

[0004] To solve the above-mentioned technical problems, this utility model provides an adjustable resistor, comprising:

[0005] case;

[0006] Multiple resistors are disposed in the housing, and the multiple resistors are arranged at intervals along the front-back direction, and the resistance values ​​of the multiple resistors are different;

[0007] A first connecting part is disposed at one end of the housing in the lateral direction, and the first connecting part is correspondingly connected to one end of each resistor in the lateral direction.

[0008] The second connecting part is disposed in the housing and is arranged opposite to the first connecting part in the lateral direction. The second connecting part includes a plurality of connecting bodies that are spaced apart in the longitudinal direction, and the plurality of connecting bodies are connected to the plurality of resistors in a one-to-one correspondence.

[0009] A sliding member, slidably mounted longitudinally to the housing, is selectively connected to one of the plurality of connectors; and,

[0010] The external wiring includes a first connecting line that is connected to the first connecting part and a second connecting line that is connected to the sliding member.

[0011] Optionally, each of the resistors is arranged in a sheet shape, and the outer contour dimensions of the plurality of resistors are the same, while the hollow shapes are different.

[0012] Optionally, each of the resistors is detachably mounted on the housing.

[0013] Optionally, the housing has a plurality of mounting cavities arranged at intervals in the longitudinal direction, and the plurality of resistors are mounted in the plurality of mounting cavities in a one-to-one correspondence.

[0014] Optionally, each of the mounting cavities has a socket that communicates with the outside of the housing. Each socket is disposed at one end of the housing in the longitudinal direction and is located between the first connecting part and the second connecting part in the transverse direction. The plurality of sockets are arranged at intervals in the front-back direction, and each resistor is inserted into the corresponding mounting cavity through the socket.

[0015] Optionally, the housing further includes a first cavity, the first connecting portion is mounted in the first cavity, and the first connecting portion has a plurality of protruding feet protruding on the side facing the second connecting portion. The plurality of protruding feet extend into the plurality of mounting cavities one by one to contact the plurality of resistors one by one.

[0016] Optionally, each of the protruding feet includes two first clamps spaced apart in the front-rear direction, and a first clamping gap is defined between the two first clamps, which extends longitudinally through the protruding foot. Each resistor is interference-fitted with the corresponding first clamping gap.

[0017] Optionally, the housing further forms a second cavity, the second connecting portion is installed in the second cavity, and one end of each connecting body facing the first connecting portion extends into the corresponding mounting cavity to contact the corresponding resistor.

[0018] Optionally, each of the connectors includes two second clamps spaced apart in the front-rear direction, and a second clamping gap is defined between the two second clamps, which extends longitudinally through the connector. Each resistor is interference-fitted with the corresponding second clamping gap.

[0019] Optionally, the housing has a groove on its lateral end side that connects to the second cavity. The groove extends longitudinally. One end of the sliding member extends into the second cavity from the groove and slides into contact with the second connecting part. The other end of the sliding member is located outside the housing and is provided with an insulating sleeve.

[0020] The technical solution provided by this utility model has the following advantages:

[0021] This invention provides an adjustable resistor, comprising a housing, a first connecting part, a second connecting part, a sliding member, and external wiring. The housing contains multiple resistors with different resistance values ​​arranged at intervals along the front-to-back direction. The second connecting part has multiple connectors spaced longitudinally and correspondingly connected to each resistor. The sliding member is slidably mounted on the housing and can be selectively connected to one of the connectors. In the embodiment provided by this invention, by sliding the sliding member to select different connectors, the resistor connected to the circuit can be quickly switched, achieving segmented and precise adjustment of the resistance value. This solves the problem of inaccurate adjustment in traditional sliding resistors. Furthermore, it eliminates the need to disassemble the housing or manually replace the resistors; adjustment is completed simply by sliding, greatly simplifying the operation process and improving ease of use. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 A front view of an embodiment of the adjustable resistor provided by this utility model;

[0024] Figure 2 for Figure 1 Sectional view at point AA;

[0025] Figure 3 for Figure 1 Top view of a medium-sized adjustable resistor;

[0026] Figure 4 for Figure 3 Sectional view at point BB.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100 - Resistor; 10 - Housing; 11 - First cavity; 12 - Second cavity; 13 - Slide groove; 20 - Resistor element; 30 - First connecting part; 31 - Protruding foot; 311 - First clamping piece; 40 - Second connecting part; 41 - Connecting body; 411 - Second clamping piece; 50 - Sliding piece; 51 - Insulating sleeve; 61 - First connecting wire; 62 - Second connecting wire; 70 - Mounting cavity; 71 - Socket. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The present utility model will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0031] Please see Figures 1 to 4 This invention provides an adjustable resistor 100. Specifically, the resistor 100 can switch between multiple precise resistance values, making it particularly suitable for electronic circuits that require switching between multiple precise resistance values. It should be noted that in the description of directionality in this invention, the lateral, longitudinal, and front-back directions are three mutually perpendicular directions.

[0032] like Figure 1 and Figure 2 As shown, resistor 100 includes a housing 10, multiple resistors 20, a first connecting portion 30, a second connecting portion 40, and a slider 50. The housing 10 contains multiple resistors 20 arranged at intervals along the front-to-back direction, and each resistor 20 has a different resistance value. The first connecting portion 30 is located at one end of the housing 10 in the lateral direction, and the second connecting portion 40 is located at the other end of the housing 10, opposite to the first connecting portion 30. The first connecting portion 30 and the second connecting portion 40 are used to connect external wires, such as external power supplies and operating circuits. Specifically, the external wires include a first connecting line 61 connected to the first connecting portion 30 and a second connecting line 62 connected to the slider 50. In practical applications, the housing 10 can be made of insulating materials such as engineering plastics to ensure circuit isolation and safety. The resistors 20 can be made of highly stable alloy materials or carbon film materials, and specific conductive paths are formed through laser engraving or etching processes according to different resistance value requirements.

[0033] Please continue to refer to the following: Figure 3 and Figure 4The first connecting portion 30 is connected to one end of each resistor 20 in the lateral direction. The second connecting portion 40 includes a plurality of connecting bodies 41 spaced apart in the longitudinal direction, each connecting body 41 corresponding to one of the resistors 20. The sliding member 50 is slidably mounted in the housing 10 in the longitudinal direction to selectively connect to one of the connecting bodies 41. When the sliding member 50 slides to contact a certain connecting body 41, one end of the resistor 20 corresponding to that connecting body 41 is connected to the power supply and working circuit through the first connecting portion 30 and the first connecting line 61, and the other end of the resistor 20 is connected to the power supply and working circuit through the sliding member 50 and the second connecting line 62, forming a complete current loop. That is, by sliding the sliding member 50 longitudinally to switch the connected connecting body 41, the resistor 20 connected to the circuit can be changed, thereby achieving resistance value switching. This structure avoids the resistance drift problem caused by contact wear of traditional sliding resistors 100. By pre-setting multiple resistors 20 with fixed resistance values, the adjustment accuracy is ensured. At the same time, the resistance value can be adjusted and switched through a simple sliding operation. Furthermore, there is no need to disassemble the housing 10 or manually replace the resistor 20. The adjustment is completed by a simple sliding action, which greatly simplifies the operation process and improves the ease of use.

[0034] Based on the previous embodiment, the specific shape and structure of the resistor 20 can be designed as needed. Specifically, each resistor 20 is arranged in a sheet shape, and the outer contour dimensions of multiple resistors 20 are consistent, while the hollow shapes are different. For example, each resistor 20 can use a rectangular substrate of the same size. By processing hollow areas of different shapes (such as straight lines, broken lines, spirals, etc.) on the substrate, the length and path of the conductive material are changed, thereby forming different resistance values. This design facilitates the standardized installation of the resistor 20 in the mounting cavity 70 of the housing 10, and at the same time, the resistance value is diversified by the difference in hollow shape, without the need for additional adjustment of the substrate size, thus simplifying the manufacturing process.

[0035] Optionally, each of the resistor elements 20 is detachably mounted on the housing 10. This design allows users to flexibly replace or upgrade the resistor elements 20 according to actual needs. For example, when it is necessary to expand the resistance range, simply remove the original resistor element 20 and install a resistor element 20 with a new resistance value, thereby improving the maintainability and applicability of the resistor 100.

[0036] Based on the above embodiments, there are various structures for mounting each resistor 20 in the housing 10. Specifically, the housing 10 has multiple mounting cavities 70 arranged longitudinally at intervals, and the multiple resistors 20 are installed one-to-one in the multiple mounting cavities 70. The number of mounting cavities 70 can be designed according to the resistance adjustment requirements. Preferably, the spacing between adjacent mounting cavities 70 is uniform to ensure that the slider 50 can be accurately aligned with each connector 41 when moving longitudinally. Each mounting cavity 70 provides an independent mounting space for the resistor 20, avoiding electromagnetic interference between adjacent resistors 20. At the same time, the longitudinal arrangement allows the resistors 20 to be distributed in layers inside the housing 10, effectively utilizing space and making the overall structure of the resistor 100 more compact.

[0037] Preferably, each mounting cavity 70 has a socket 71 communicating with the outside of the housing 10. Each socket 71 is disposed at one end of the housing 10 in the longitudinal direction and is located between the first connecting part 30 and the second connecting part 40 in the transverse direction. Multiple sockets 71 are arranged at intervals in the front-back direction. Each resistor 20 is inserted into its corresponding mounting cavity 70 through a socket 71. Specifically, the shape of each socket 71 matches the shape of each resistor 20; for example, a sheet resistor 20 corresponds to a rectangular socket 71, and the insertion direction is consistent with the longitudinal axis of the mounting cavity 70. This plug-and-play installation method allows the resistor 20 to be installed and removed without tools, completed manually, further improving operational convenience. Simultaneously, the socket 71 is positioned between the first connecting part 30 and the second connecting part 40, shortening the conductive connection path between the resistor 20 and both, reducing line impedance and energy loss. In a preferred embodiment, the socket 71 may be provided with a dust cover. After the resistor 20 is inserted, the dust cover is closed to prevent dust from entering the mounting cavity 70 and affecting the contact reliability.

[0038] Optionally, please refer to Figure 2 and Figure 4 The housing 10 also has a first cavity 11, and the first connecting portion 30 is installed in the first cavity 11. The first connecting portion 30 has a plurality of protruding feet 31 protruding from the side facing the second connecting portion 40. These protruding feet 31 extend into the plurality of mounting cavities 70 one-to-one to contact the plurality of resistors 20. Optionally, the protruding feet 31 are made of a conductive metal material such as copper or brass to ensure their conductivity. When a resistor 20 is inserted into a mounting cavity 70, its lateral end automatically contacts the protruding foot 31, forming a reliable electrical connection through close contact between the protruding foot 31 and the surface of the resistor 20. This structure eliminates the need for additional welding processes, achieving conductivity through mechanical contact, facilitating the replacement of the resistor 20 and avoiding heat damage from welding.

[0039] Preferably, each of the protruding feet 31 includes two first clamping members 311 spaced apart in the front-rear direction. A first clamping gap is defined between the two first clamping members 311, extending longitudinally through the protruding foot 31. Each resistor 20 is interference-fitted with the corresponding first clamping gap. The first clamping member 311 is made of elastic metal sheet, and its inner side may be provided with anti-slip texture or conductive coating. When the resistor 20 is inserted into the first clamping gap, the two first clamping members 311 clamp the two sides of the resistor 20 by elastic force, and the interference fit ensures tight contact without loosening. This clamping structure not only provides a reliable electrical connection, but also effectively fixes the resistor 20 and prevents it from shaking inside the housing 10. Preferably, the first clamping member 311 can be designed as an arc-shaped structure to facilitate the insertion and removal of the resistor and reduce the risk of damage to the resistor during insertion and removal, further enhancing the clamping force and self-adaptive capability of the resistor 20.

[0040] In one embodiment, the housing 10 further forms a second cavity 12, the second connecting portion 40 is installed in the second cavity 12, and one end of each connecting body 41 facing the first connecting portion 30 extends into the corresponding mounting cavity 70 to contact the corresponding resistor 20. In this embodiment, one end of each connecting body 41 extends into the mounting cavity 70 and contacts the other end of the resistor 20 laterally, while the other end cooperates with the slider 50 in the second cavity 12, forming a conduction path for current through the resistor 20, the connecting body 41, and the slider 50. This split cavity design facilitates the installation of the first connecting portion 30, the second connecting portion 40, and the slider 50, and can effectively protect the first connecting portion 30 and the second connecting portion 40, facilitating modular design and troubleshooting.

[0041] Preferably, each connector 41 includes two second clamps 411 spaced apart in the front-rear direction. A second clamping gap is defined between the two second clamps 411, extending longitudinally through the connector 41. Each resistor 20 is interference-fitted with the corresponding second clamping gap. In this embodiment, when the other end of the resistor 20 is inserted into the second clamping gap, the two second clamps 411 clamp the resistor 20 through elastic deformation, jointly fixing the front-rear position of the resistor 20, and cooperating with the first clamp 311 to form a bidirectional clamping structure, further improving the stability of the resistor 20 installation. Simultaneously, the interference-fit clamping method can adapt to resistors 20 of different thicknesses; multiple specifications can be accommodated simply by adjusting the clamp spacing.

[0042] Furthermore, the housing 10 has a groove 13 on its lateral end side that connects to the second cavity 12. The groove 13 extends longitudinally, and one end of the sliding member 50 extends into the second cavity 12 from the groove 13 and slides in contact with the second connecting part 40. The other end of the sliding member 50 is located outside the housing 10 and is provided with an insulating sleeve 51. Preferably, the width of the groove 13 is adapted to the sliding member 50 to ensure that it can only move longitudinally and cannot wobble laterally. The insulating sleeve 51 is made of rubber or silicone material, and the surface can be provided with anti-slip texture. When the user pushes the sliding member 50, its end extending into the second cavity 12 moves longitudinally in the groove 13 and contacts each connecting body 41 in sequence. The contact points are electrically connected using conductive rubber or metal contacts, so that the resistance value can be switched by pushing the sliding member 50 to different positions along the groove 13.

[0043] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, those skilled in the art can make other variations or modifications without creative effort, and all such variations or modifications should fall within the protection scope of this utility model.

Claims

1. An adjustable resistor, characterized in that, include: case; Multiple resistors are disposed in the housing, and the multiple resistors are arranged at intervals along the front-back direction, and the resistance values ​​of the multiple resistors are different; A first connecting part is disposed at one end of the housing in the lateral direction, and the first connecting part is correspondingly connected to one end of each resistor in the lateral direction. The second connecting part is disposed in the housing and is arranged opposite to the first connecting part in the lateral direction. The second connecting part includes a plurality of connecting bodies that are spaced apart in the longitudinal direction, and the plurality of connecting bodies are connected to the plurality of resistors in a one-to-one correspondence. A sliding member, slidably mounted longitudinally to the housing, is selectively connected to one of the plurality of connectors; and, The external wiring includes a first connecting line that is connected to the first connecting part and a second connecting line that is connected to the sliding member.

2. The adjustable resistor as described in claim 1, characterized in that, Each of the resistors is arranged in a sheet shape, and the outer contour dimensions of the multiple resistors are the same, but the hollow shapes are different.

3. The adjustable resistor as described in claim 1, characterized in that, Each of the resistors is detachably mounted on the housing.

4. The adjustable resistor as described in any one of claims 1 to 3, characterized in that, The housing has multiple mounting cavities arranged at intervals in the longitudinal direction, and the multiple resistors are installed in the multiple mounting cavities one by one.

5. The adjustable resistor as described in claim 4, characterized in that, Each of the mounting cavities has a socket that connects to the outside of the housing. Each socket is located at one end of the housing in the longitudinal direction and between the first connecting part and the second connecting part in the transverse direction. The multiple sockets are arranged at intervals in the front-back direction. Each resistor is inserted into the corresponding mounting cavity through the socket.

6. The adjustable resistor as described in claim 4, characterized in that, The housing also has a first cavity, the first connecting part is installed in the first cavity, and the first connecting part has a plurality of protruding feet protruding on the side facing the second connecting part. The plurality of protruding feet extend into the plurality of mounting cavities one by one to contact the plurality of resistors one by one.

7. The adjustable resistor as described in claim 6, characterized in that, Each of the protruding feet includes two first clamping members spaced apart in the front-rear direction. A first clamping gap is defined between the two first clamping members and extends longitudinally through the protruding foot. Each resistive element is interference-fitted with the corresponding first clamping gap.

8. The adjustable resistor as described in claim 4, characterized in that, The housing also forms a second cavity, the second connecting part is installed in the second cavity, and the end of each connecting part facing the first connecting part extends into the corresponding mounting cavity to contact the corresponding resistor.

9. The adjustable resistor as described in claim 8, characterized in that, Each of the connecting bodies includes two second clamps spaced apart in the front-rear direction, and a second clamping gap is defined between the two second clamps, which extends longitudinally through the connecting body. Each resistor is interference-fitted with the corresponding second clamping gap.

10. The adjustable resistor as described in claim 8, characterized in that, The housing has a groove on its transverse end side that connects to the second cavity. The groove extends longitudinally. One end of the sliding member extends into the second cavity from the groove and slides into contact with the second connecting part. The other end of the sliding member is located outside the housing and is provided with an insulating sleeve.

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