An adjustable strap resistance

Abstract

The present application relates to the technical field of resistance, in particular to a kind of adjustable belt resistance, including integrated structure continuous bending resistance band, to form and parallel multiple straight sections, and every adjacent two straight sections are connected via U-shaped bending section, characterized by: still including the short-circuiting assembly of detachably connecting bending section, short-circuiting assembly selectively electrically conductive part bending section, to make current cross corresponding straight section through short-circuiting assembly. When using, according to the required resistance value, short-circuiting assembly is connected in different bending section, make these bending section short circuit, i.e. current no longer passes through these bending section but flows through short-circuiting assembly, i.e. in the case of whole resistance band, by short-circuiting assembly to replace part of original section, therefore can change the original resistance band single resistance value by adjusting the resistance value of short-circuiting assembly, use more flexible.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of resistance, in particular to an adjustable strip resistance. BACKGROUND

[0002] The forms of traditional strip resistors are various, and most of the resistance structures are too complex, and the production and assembly methods are quite cumbersome.

[0003] The Chinese patent document with publication number CN211125208U discloses a strip resistor convenient to install, which comprises two side plates, a screw rod, a support frame and two resistance strips. Each resistance strip is in a continuous and meandering shape. The support frame is insulating, and a mounting hole is formed in the middle of the support frame. The screw rod passes through the mounting hole, and the two ends of the screw rod are fixed to the two side plates respectively. A plurality of upper limiting grooves are arranged side by side on the top of the support frame, and a plurality of segments of one of the resistance strips are embedded in the plurality of upper limiting grooves respectively. A plurality of lower limiting grooves are arranged side by side on the bottom of the support frame, and a plurality of segments of the other resistance strip are embedded in the plurality of lower limiting grooves respectively. Hook-shaped parts are arranged at the two ends of the support frame, and the outermost segments of the resistance strips are clamped by the hook-shaped parts. The strip resistor does not need to weld a support at the meandering bending part of the resistance strip as in the traditional way, and the screw rod directly passes through the mounting hole of the support frame without the need to coat mica on the surface of the screw rod, so the manufacturing is simple and the cost is saved.

[0004] For example, the Chinese patent document with publication number CN110767397B discloses a stable strip resistor, which comprises a plurality of resistance units arranged along the longitudinal direction. Each resistance unit comprises two parallel insulating rods, a plurality of resistance strips, insulator supports and a plurality of U-shaped bends. The two ends of the insulating rod are respectively fixed with the insulator supports, thereby separating the adjacent two resistance units. The plurality of U-shaped bends are connected in series. Each resistance strip comprises a strip body and a bending part which are integrally stamped and formed. The bending part is arranged along the length direction of the strip body, and the bending part and the strip body are arranged at an angle of 100°-170°. The insulating rod is integrally formed with an inclined limiting plate, and the two ends of the strip body of the resistance strip are respectively fixed to the limiting plates of the two insulating rods, thereby making the resistance strip arranged obliquely. Compared with the prior art, the resistance strip is integrally stamped and formed with the bending part along the length direction, and the strip body is arranged obliquely, so that the structure is firm and can withstand higher electric stress and is not easy to deform.

[0005] Such strip resistors have a whole continuous bending metal strip as a resistance strip, and each resistance strip is a resistance unit. The current flows through at least one resistance unit in the current technical bias, that is, through the whole resistance strip from front to back. When different resistance values need to be adjusted, different numbers of resistance strips are connected in series or parallel. Therefore, a sufficient number of resistance strips need to be provided when the product is shipped, but the resistance value cannot be adjusted when a smaller resistance value than a single resistance strip is required. SUMMARY

[0006] In view of all or part of the above technical problems existing in the prior art, the present application provides an adjustable strip resistance.

[0007] To achieve the above object, the present application provides the following technical solutions:

[0008] The present application provides an adjustable strip resistance, which comprises a resistance strip in an integrated structure and continuously curved, thereby forming a plurality of parallel straight strip segments, and each adjacent two straight strip segments are connected in series through a U-shaped curved segment, characterized in that: the adjustable strip resistance further comprises a short-circuit assembly detachably connected to the curved segment, and the short-circuit assembly selectively electrically connects part of the curved segments, so that the current passes through the short-circuit assembly to cross the corresponding straight strip segment.

[0009] Specifically, the short-circuit assembly comprises a conductive rod, a locking screw and a conductive sheet, the conductive rod is embedded in the inner side of the curved segment, and the conductive sheet is arranged on the end face of different curved segments, so as to electrically connect different curved segments; the two ends of the conductive rod are provided with internal threads, and the locking screw is screwed into the internal threads to press the conductive sheet.

[0010] Specifically, the conductive sheet is provided with a clearance groove for embedding the locking screw.

[0011] Specifically, the two ends of the conductive rod are respectively provided with the conductive sheet and the locking screw.

[0012] Specifically, the diameter of the conductive rod matches the bending diameter of the curved segment, so that the outer wall of the conductive rod is attached to the inner wall of the curved segment.

[0013] Specifically, the short-circuit assembly comprises a C-shaped conductive groove on the outer wall of each curved segment, the conductive groove is inserted with a positioning column, the positioning column is connected with a positioning sheet penetrating out of the conductive groove, and each positioning sheet is penetrated with a conductive rod; when the positioning column and the positioning sheet are selected as metal pieces, the corresponding curved segment is electrically connected; when the positioning column and the positioning sheet are selected as insulating pieces, the corresponding curved segment is not electrically connected.

[0014] Specifically, the conductive rod is provided with an insulating support plate, so as to support the resistance strip.

[0015] Specifically, the conductive groove is welded to the curved segment, or the conductive groove is integrally formed at the curved point.

[0016] Specifically, the plurality of straight strip segments are arranged in two rows, and the curved segments of the two rows of straight strip segments are aligned with each other, and a limiting assembly is arranged between two curved segments close to each other, the limiting assembly comprises a first clamping block, a second clamping block and a connecting plate, the first clamping block and the second clamping block are fixed to the two ends of the connecting plate, and the first clamping block and the second clamping block are provided with C-shaped clamping grooves abutting against the outer wall of the curved segment.

[0017] Specifically, the mica isolation block is provided with a plurality of slots, and the sidewall of the straight belt section is formed with a C-shaped clasp by stamping, and the straight belt section and the clasp are embedded in different slots.

[0018] The present application has the following advantages:

[0019] The adjustable belt resistance of the present application can be used according to the required resistance value, and the short-circuit assembly is connected to different bending sections to short-circuit the bending sections, so that the current no longer flows through the corresponding straight belt sections of the bending sections but flows through the short-circuit assembly, that is, in the case of the whole resistance belt, the short-circuit assembly replaces part of the original sections, so that the original single resistance value of the resistance belt can be changed by adjusting the resistance value of the short-circuit assembly, and the use is more flexible. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is a structural schematic diagram of an adjustable belt resistance in the embodiment.

[0021] Fig. 2 It is an exploded view of an adjustable belt resistance in the embodiment.

[0022] Fig. 3 It is a schematic diagram of a resistance belt in the embodiment.

[0023] REFERENCE NUMERALS:

[0024] Resistance belt 1, straight belt section 11, bending section 12, clasp 13;

[0025] Short-circuit assembly 2;

[0026] Conductive rod 31, locking screw 32, conductive sheet 33, clearance groove 34;

[0027] Conductive groove 41, positioning column 42, positioning sheet 43, conductive rod 44;

[0028] Support plate 5;

[0029] Limiting assembly 6, first clamping block 61, second clamping block 62, connecting plate 63, clamping groove 64;

[0030] Mica isolation block 7, slot 71. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0032] The adjustable belt resistance of the present embodiment is as follows: Figs. 1 to 3As shown, the resistance band 1 comprises a continuous bending structure, so as to form a plurality of parallel straight sections 11, and each two adjacent straight sections 11 are connected in series via a U-shaped bending section 12. The resistance band further comprises a short-circuit assembly 2 detachably connected to the bending sections 12, and the short-circuit assembly 2 selectively electrically connects the bending sections 12, so that the current flows through the short-circuit assembly 2 to bypass the corresponding straight sections 11.

[0033] In use, according to the required resistance value, the short-circuit assembly 2 is connected to the bending sections 12 to short-circuit the bending sections 12, so that the current no longer flows through the straight sections 11 corresponding to the bending sections 12 (and the bending sections 12 at the other end) but flows through the short-circuit assembly 2. In other words, in the case of the entire resistance band 1, the short-circuit assembly 2 replaces part of the original sections, so that the original single resistance value of the resistance band 1 can be changed by adjusting the resistance value of the short-circuit assembly 2, and the resistance band is more flexible to use. The resistance value of the short-circuit assembly 2 is greater than or less than the resistance value of the sections to be short-circuited, so that the total resistance value can be increased or decreased.

[0034] Two types of short-circuit assemblies 2 are shown in the drawings, one of which is located on the inner side of the bending section 12, and the other is located on the outer side of the bending section 12. In practice, only one of them can be used, or both can be used in combination.

[0035] Specifically, the short-circuit assembly 2 located on the inner side comprises a conductive rod 31, a locking screw 32 and a conductive sheet 33. The conductive rod 31 is embedded in the inner side of the bending section 12, and the conductive sheet 33 is arranged on the upper and lower end faces of different bending sections 12, so as to electrically connect the passing bending 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 drawing, and other lengths of conductive sheet 33 can be selected according to the number of bending sections 12 to be short-circuited. For example, each conductive sheet 33 in the drawing short-circuits two adjacent bending sections 12, so that the current bypasses two straight sections 11 and one bending section 12.

[0036] Specifically, the conductive sheet 33 is provided with a clearance groove 34 for embedding the locking screw 32.

[0037] Specifically, the two ends of the conductive rod 31 are respectively provided with the conductive sheet 33 and the locking screw 32.

[0038] Specifically, the diameter of the conductive rod 31 matches the bending diameter of the bending section 12, so that the outer wall of the conductive rod 31 fits the inner wall of the bending section 12.

[0039] Specifically, the short-circuit assembly 2 located at the outer side comprises a C-shaped conductive groove 41 located at the outer wall of each curved section 12, a positioning column 42 detachably inserted into the conductive groove 41, a positioning sheet 43 connected to the positioning column 42 and penetrating out of the conductive groove 41, and a conductive rod 44 penetrating through each positioning sheet 43. The positioning column 42 and the positioning sheet 43 can be made of two materials, namely metal and insulation. When the positioning column 42 and the positioning sheet 43 are made of metal, the corresponding curved section 12 is electrically conductive; when the positioning column 42 and the positioning sheet 43 are made of insulation, the corresponding curved section 12 is not electrically conductive and only serves as a support.

[0040] Specifically, the conductive rod 44 is provided with an insulating support plate 5, so as to support the resistance band 1.

[0041] Specifically, the conductive groove 41 is welded to the curved section 12, or the conductive groove 41 is integrally formed at the curved point.

[0042] Specifically, the plurality of straight band sections 11 are arranged in two rows, and the curved sections 12 of the two rows of straight band sections 11 are aligned with each other. A limiting assembly 6 is arranged between two curved sections 12 that are close to each other in alignment. The limiting assembly 6 comprises a first clamping block 61, a second clamping block 62 and a connecting plate 63. The first clamping block 61 and the second clamping block 62 are fixed to two ends of the connecting plate 63. The first clamping block 61 and the second clamping block 62 are provided with C-shaped clamping grooves 64 abutting against the outer wall of the curved section 12.

[0043] Specifically, the mica isolation block 7 is further provided with a plurality of insertion grooves 71. The sidewall of the straight band section 11 is stamped and formed into a C-shaped clamping ring 13. The straight band section 11 and the clamping ring 13 are embedded in different insertion grooves 71. The resistance band 1 is prevented from deforming, and the mica absorbs the heat generated by the resistance.

[0044] In the description of the application, it is obvious that the described embodiments are only part of the embodiments of the application, not all the embodiments. The components of the embodiments of the application described and shown in the drawings can be arranged and designed in various different configurations.

[0045] Therefore, the above detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the application. Based on the embodiments of the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0046] In the description of the application, it should be noted that the terms "middle", "upper", "lower", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0047] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "provided", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected. It can be mechanically connected or electrically connected. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication between the two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

Claims

1. An adjustable strip resistance comprising a continuous bending resistance strip (1) of integrated structure, thereby forming a plurality of juxtaposed straight strip sections (11), each two adjacent straight strip sections (11) being connected in series via a U-shaped bending section (12), characterized in that: The short-circuit assembly (2) detachably connects the curved sections (12) and selectively electrically connects the partial curved sections (12) to make the current pass through the short-circuit assembly (2) to cross the corresponding straight sections (11). The short-circuit assembly (2) comprises a conductive rod (31), a locking screw (32) and a conductive sheet (33). The conductive rod (31) is embedded in the inner side of the curved section (12). The conductive sheet (33) is arranged on the end face of the different curved sections (12) to electrically connect the different curved sections (12). The two ends of the conductive rod (31) are provided with internal threads. The locking screw (32) is screwed into the internal threads to press the conductive sheet (33).

2. An adjustable strip resistor according to claim 1, characterized in that: The conductive sheet (33) is provided with a gap slot (34) for embedding the locking screw (32).

3. An adjustable strip resistor according to claim 1, wherein: The two ends of the conductive rod (31) are respectively provided with the conductive sheet (33) and the locking screw (32).

4. The adjustable ribbon resistor of claim 1, wherein: The diameter of the conductive rod (31) matches the bending diameter of the curved section (12), so that the outer wall of the conductive rod (31) is attached to the inner wall of the curved section (12).

5. The adjustable ribbon resistor of claim 1, wherein: The plurality of 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 assembly (6) is arranged between two curved sections (12) that are close to each other. The limiting assembly (6) comprises a first clamping block (61), a second clamping block (62) and a connecting plate (63). The first clamping block (61) and the second clamping block (62) are fixed to the two ends of the connecting plate (63). The first clamping block (61) and the second clamping block (62) are provided with C-shaped clamping grooves (64) that abut against the outer wall of the curved section (12).

6. The adjustable ribbon resistor of claim 1, wherein: The mica isolation block (7) is provided with a plurality of insertion slots (71). The sidewall of the straight section (11) is stamped and formed with a C-shaped clamping ring (13). The straight section (11) and the clamping ring (13) are embedded in different insertion slots (71).

Images