An adjustable strap resistance

Abstract

The application is a divisional application of the Chinese patent application with the application date of December 31, 2024, the application number of 202411992781.7 and the title of "Adjustable strip resistance", which relates to the technical field of resistance and specifically relates to an adjustable strip resistance, which comprises an integrated continuous curved resistance strip, thereby forming multiple parallel straight strip segments, and each adjacent two straight strip segments are connected in series through a U-shaped curved segment, and the adjustable strip resistance is characterized in that: it further comprises a short-circuit assembly detachably connected to the curved segment, and the short-circuit assembly selectively electrically connects part of the curved segment, so that the current passes through the short-circuit assembly to cross the corresponding straight strip segment. When in use, according to the required resistance value, the short-circuit assembly is connected to different curved segments, so that these curved segments are short-circuited, that is, the current no longer passes through these curved segments but flows through the short-circuit assembly, that is, in the case of the whole resistance strip, the short-circuit assembly replaces part of the original segment, so that the original single resistance value of the resistance strip can be changed by adjusting the resistance value of the short-circuit assembly, and the use is more flexible.

Description

Technical Field

[0001] This invention relates to the field of resistor technology, and more specifically to an adjustable band resistor. Background Technology

[0002] Traditional ribbon resistors come in a variety of forms, and most of them have overly complex structures and are quite cumbersome to manufacture and assemble.

[0003] Chinese patent document CN211125208U discloses an easy-to-install strip resistor, comprising two side plates, a screw, a support frame, and two resistance strips, each strip being continuously tortuous and curved. The support frame is insulated and has a mounting hole in its center through which the screw passes, with both ends of the screw fixed to the two side plates respectively. The top of the support frame has multiple upper limit slots arranged side-by-side, into which multiple segments of one resistance strip are embedded. The bottom of the support frame has multiple lower limit slots arranged side-by-side, into which multiple segments of the other resistance strip are embedded. Hook-like parts are provided at both ends of the support frame, securing the outermost segments of the resistance strips. Unlike traditional methods, this eliminates the need to weld supports at the tortuous bends of the resistance strips, and the screw passes directly through the mounting hole of the support frame, eliminating the need to coat the screw surface with mica, thus simplifying manufacturing and saving costs.

[0004] For example, Chinese patent document CN110767397B discloses a stable strip resistor, comprising multiple resistor units arranged longitudinally. Each resistor unit includes two parallel insulating rods, multiple resistor strips, insulator supports, and multiple U-shaped bends. Insulator supports are fixed to both ends of the insulating rods, thus separating adjacent resistor units. The multiple U-shaped bends connect the multiple resistor strips in series. Each resistor strip includes an integrally stamped strip body and a bent portion. The bent portion is arranged along the length of the strip body, and the bent portion is at an angle of 100° to 170° to the strip body. The insulating rods are integrally formed with inclined limiting plates. The two ends of the resistor strip body are respectively fixed to the limiting plates of the two insulating rods, thus causing the resistor strip to be arranged at an angle. Compared with the prior art, because the resistor strip is stamped with a bent portion along its length and the strip body is arranged at an angle, the structure is robust, can withstand higher electrodynamic stress, and is not easily deformed.

[0005] Such strip resistors consist of a single, continuously curved metal strip, with each strip forming a resistive unit. Current technology precludes current from flowing through at least one resistive unit, meaning the current travels from front to back across the entire strip. To adjust resistance values, different numbers of strips are connected in series or parallel. This means the product must be shipped with a sufficient number of strips, but it cannot adjust resistance values ​​smaller than those achieved with a single strip. Summary of the Invention

[0006] In view of the above-mentioned technical problems existing in the prior art, the present invention provides an adjustable band resistor.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An adjustable strip resistor is provided, comprising an integrally structured, continuously bent resistor strip forming multiple parallel straight strip segments. Each pair of adjacent straight strip segments is connected in series via a U-shaped bend. The resistor is characterized by further including a shorting assembly detachably connected to the bend segments. The shorting assembly selectively conducts electricity through a portion of the bend segments, allowing current to pass through the shorting assembly and across the corresponding straight strip segments. The shorting assembly includes C-shaped conductive grooves located on the outer wall of each bend segment. Positioning posts are inserted into the conductive grooves, and positioning plates extending beyond the conductive grooves are connected to the positioning posts. Each positioning plate has a conductive rod. When the positioning posts and positioning plates are metal, the corresponding bend segment is electrically conductive; when the positioning posts and positioning plates are insulated, the corresponding bend segment is not electrically conductive.

[0008] Specifically, the conductive rod is equipped with an insulated support plate to support the resistor strip.

[0009] Specifically, the conductive groove is welded to the bent section, or the conductive groove is integrally formed at the bent point.

[0010] Specifically, multiple straight belt segments are arranged in two rows, and the curved segments of the two rows of straight belt segments are aligned with each other. A limiting component is provided between two closely aligned curved segments. The limiting component includes a first locking block, a second locking block, and a connecting plate. The first locking block and the second locking block are fixed to both ends of the connecting plate. The first locking block and the second locking block are provided with C-shaped locking grooves that abut against the outer wall of the curved segment.

[0011] Specifically, it also includes mica isolation blocks, which are equipped with multiple slots. The sidewalls of the straight belt section are stamped with C-shaped retaining rings, and the straight belt section and retaining rings are embedded in different slots.

[0012] The beneficial effects of this invention are: The present invention provides an adjustable strip resistor. In use, according to the required resistance value, shorting components are connected to different bends to short-circuit these bends. That is, the current no longer flows through the straight sections corresponding to these bends but flows through the shorting components. In other words, in the case of the entire resistor strip, the shorting components replace part of the original sections. Therefore, the resistance value of the original single resistance strip can be changed by adjusting the resistance value of the shorting components, making it more flexible in use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of an adjustable band resistor in one of the embodiments.

[0014] Figure 2 This is an exploded view of an adjustable band resistor in one of the embodiments.

[0015] Figure 3 This is a schematic diagram of the resistor band in the embodiment.

[0016] Figure label: Resistance band 1, straight band section 11, bent section 12, retaining ring 13; Short-circuit component 2; Conductive rod 31, locking screw 32, conductive sheet 33, clearance groove 34; Conductive groove 41, positioning post 42, positioning piece 43, conductive rod 44; Support plate 5; Limiting component 6, first locking block 61, second locking block 62, connecting plate 63, and locking slot 64; Mica isolation block 7, slot 71. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0018] One example of this embodiment is an adjustable band resistor, such as... Figures 1 to 3 As shown, the resistor includes a continuously bent resistor strip 1 with an integrated structure, forming multiple parallel straight segments 11. Each pair of adjacent straight segments 11 are connected in series via a U-shaped bend 12. The resistor also includes a shorting assembly 2 that detachably connects different bends 12. The shorting assembly 2 selectively conducts electricity through a portion of the bend 12, allowing current to pass through the shorting assembly 2 and across the corresponding straight segment 11.

[0019] In use, depending on the required resistance value, shorting components 2 are connected to different bends 12 to short-circuit these bends 12. This means the current no longer flows through the corresponding straight section 11 (and the bend 12 at the other end) but instead flows through the shorting components 2. In other words, in the case of the entire resistor band 1, the shorting components 2 replace part of the original segment. Therefore, the resistance value of the resistor band 1 can be changed by adjusting the resistance value of the shorting components 2, making it more flexible. The resistance value of the shorting components 2 can be greater than or less than the short-circuited segment, thus increasing or decreasing the overall resistance.

[0020] The figure shows two ways of shorting component 2: one located inside the bent section 12, and the other located outside the bent section 12. In practice, only one method can be used, or both methods can be combined.

[0021] Specifically, the inner shorting assembly 2 includes a conductive rod 31, a locking screw 32, and a conductive sheet 33. The conductive rod 31 is embedded inside the bent section 12, and the conductive sheet 33 is placed on the upper and lower end faces of different bent sections 12, thereby conducting electricity through the bent sections 12. The two ends of the conductive rod 31 are provided with internal threads, and the locking screw is screwed into the internal threads to press the conductive sheet 33. Only one length of conductive sheet 33 is shown in the figure. In practice, other lengths of conductive sheet 33 can be selected according to the number of bent sections 12 that need to be shorted. For example, if each conductive sheet 33 in the figure shorts two adjacent bent sections 12, then for this part, the current will flow through two straight sections 11 and one bent section 12 less.

[0022] Specifically, the conductive sheet 33 is provided with a relief groove 34 for the locking screw 32 to be inserted.

[0023] Specifically, the conductive rod 31 has a conductive sheet 33 and a locking screw 32 at both ends.

[0024] Specifically, the diameter of the conductive rod 31 matches the bending diameter of the bent section 12, so that the outer wall of the conductive rod 31 fits into the inner wall of the bent section 12.

[0025] Specifically, the shorting assembly 2 located on the outer side includes a C-shaped conductive groove 41 located on the outer wall of each bending segment 12. A positioning post 42 is detachably inserted into the conductive groove 41, and the positioning post 42 is connected to a positioning piece 43 extending beyond the conductive groove 41. Each positioning piece 43 is fitted with a conductive rod 44. The positioning post 42 and positioning piece 43 can be made of two materials: metal or insulating material. When the positioning post 42 and positioning piece 43 are made of metal, the corresponding bending segment 12 is electrically conductive; when the positioning post 42 and positioning piece 43 are made of insulating material, the corresponding bending segment 12 is not electrically conductive and only serves a supporting function.

[0026] Specifically, the conductive rod 44 is provided with an insulating support plate 5, which supports the resistor strip 1.

[0027] Specifically, the conductive groove 41 is welded to the bending section 12, or the conductive groove 41 is integrally formed at the bending point.

[0028] Specifically, multiple straight belt segments 11 are arranged in two rows, and the curved segments 12 of the two rows of straight belt segments 11 are aligned with each other. A limiting component 6 is provided between two closely aligned curved segments 12. The limiting component 6 includes a first locking block 61, a second locking block 62 and a connecting plate 63. The first locking block 61 and the second locking block 62 are fixed to both ends of the connecting plate 63. The first locking block 61 and the second locking block 62 are provided with C-shaped slots 64 that abut against the outer wall of the curved segment 12.

[0029] Specifically, it also includes a mica isolation block 7, which has multiple slots 71. The sidewall of the straight section 11 is stamped with a C-shaped retaining ring 13, and the straight section 11 and the retaining ring 13 are embedded in different slots 71. This prevents the resistor strip 1 from deforming, and the mica absorbs the heat generated by the resistor.

[0030] In the description of this invention, it is obvious that the described embodiments are merely a part of the embodiments of the invention, and not all of them. The components of the embodiments of the invention described and illustrated herein can generally be arranged and designed in various different configurations.

[0031] Therefore, the above detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0032] In the description of this invention, it should be noted that the terms "middle," "upper," "lower," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention 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 invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" 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, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. An adjustable strip resistor comprising an integrally structured, continuously bent resistor strip (1) forming multiple parallel straight strip segments (11), wherein each adjacent pair of straight strip segments (11) is connected in series via a U-shaped bent segment (12), characterized in that: It also includes a shorting assembly (2) that detachably connects the bending section (12). The shorting assembly (2) selectively conducts electricity through part of the bending section (12), so that the current passes through the shorting assembly (2) and crosses the corresponding straight section (11). The shorting assembly (2) includes a C-shaped conductive groove (41) located on the outer wall of each bending section (12). The conductive groove (41) is inserted with a positioning post (42). The positioning post (42) is connected to a positioning piece (43) that extends out of the conductive groove (41). Each positioning piece (43) is connected with a conductive rod (44). When the positioning post (42) and the positioning piece (43) are selected as metal parts, the corresponding bending section (12) is electrically conductive. When the positioning post (42) and the positioning piece (43) are selected as insulating parts, the corresponding bending section (12) is not electrically conductive.

2. An adjustable band resistor according to claim 1, characterized in that: The conductive rod (44) is provided with an insulating support plate (5) to support the resistor strip (1).

3. An adjustable band resistor according to claim 1, characterized in that: The conductive groove (41) is welded to the bending section (12), or the conductive groove (41) is integrally formed at the bending point.

4. An adjustable band resistor according to claim 1, characterized in that: Multiple straight sections (11) are arranged in two rows, and the curved sections (12) of the two rows of straight sections (11) are aligned with each other. A limiting component (6) is provided between two closely aligned curved sections (12). The limiting component (6) includes a first locking block (61), a second locking block (62) and a connecting plate (63). The first locking block (61) and the second locking block (62) are fixed to both ends of the connecting plate (63). The first locking block (61) and the second locking block (62) are provided with C-shaped slots (64) that abut against the outer wall of the curved section (12).

5. An adjustable band resistor according to claim 1, characterized in that: It also includes a mica isolation block (7), which is provided with multiple slots (71). The side wall of the straight belt section (11) is stamped with a C-shaped retaining ring (13), and the straight belt section (11) and the retaining ring (13) are embedded in different slots (71).

Images