Painted wire-wound resistor

Abstract

The utility model discloses a painting wire-wound resistor, and particularly relates to the technical field of wire-wound resistors, which comprises a heat-conducting shell, a porcelain tube is arranged in the heat-conducting shell, a resistance wire is wound at the outer end of the porcelain tube, a connecting window is arranged at the outer end of the resistance wire, a lead-out plate is arranged in the heat-conducting shell, and the lead-out plate is arranged in the heat-conducting shell. The bottom end of the lead-out plate is connected with the resistance wire through the connecting window; and a winding rod is rotationally connected between the two fixing plates on the same side, and a protective belt is wound around the outer end of the winding rod. According to the utility model, the outside of the connection window is protected through the two protection belts, and the two protection belts can be automatically reeled and unreeled along with the adjustment of the positions of the lead-out plate and the second lead-out end, so that the dustproof effect on the connection window is better, the condition that dust is accumulated on the connection window is avoided, the resistor is more stable and safer to use, and the service life of the resistor is prolonged. And the adjusting and fixing processes of the lead-out plate are simple and convenient, and the use effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to wire wound resistor technical field, concretely relates to a kind of lacquered wire wound resistor. BACKGROUND

[0002] Wire wound resistor is made of constantan, manganese copper or nickel complex alloy wire on ceramic framework, and has protective paint or glass glaze on the surface.Wire wound resistor wire is generally made of nickel-chromium, manganese copper and other alloys with certain resistivity, and the insulating framework is generally made of ceramic, plastic or metal framework coated with an insulating layer.In wire wound resistor, there is an adjustable wire wound resistor, which has a movable clasp as a contact lead-out end outside the wire winding, and a narrow window is left on the paint layer to expose the wire winding contact path.The clasp can be moved on the contact path through the contact to adjust the resistance, so it is a variable resistor.

[0003] Currently, the adjustable lacquered wire wound resistor has a narrow window on the resistive wire paint layer to facilitate connection with the contact lead-out structure, and generally has no protective structure on the outside, which exposes the conductive resistive wire part, and dust accumulates on the window after long-term use, which affects the safe use of the resistor and the use effect is not good. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a lacquered wire wound resistor to solve the above problems in the art.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a lacquered wire wound resistor, comprising:

[0006] A heat-conducting shell is provided with a porcelain tube inside, an electric resistance wire is wound around the outer end of the porcelain tube, a first lead-out end is connected to one end of the electric resistance wire, the first lead-out end extends to the outside of one end of the heat-conducting shell, a connection window is provided on the outer end of the electric resistance wire, an lead-out plate is provided inside the heat-conducting shell, the bottom end of the lead-out plate is connected to the electric resistance wire through the connection window, and a second lead-out end is connected to the top end of the lead-out plate extending to the top end of the heat-conducting shell.

[0007] Four fixed plates are provided with a winding rod rotatably connected between two fixed plates on the same side, a protective band is wound around the outer end of the winding rod, and the bottom end of the lead-out plate is fixedly connected to the two sides of the protective band on one end of the two protective bands, respectively.The protective band is arranged at the top end of the connection window, and the outer end of the winding rod is provided with two elastic ropes, one end of the elastic rope is fixedly connected to the outer end of the winding rod, and the other end of the winding rod is fixedly connected to the fixed plate.

[0008] Preferably, a communication port is provided at the top end of the heat-conducting shell, and the top end of the lead-out plate passes through the inside of the communication port, facilitating the movement of the lead-out plate.

[0009] Preferably, the two side walls inside the communication port are provided with sliding grooves, the sliding grooves are provided with sliding blocks inside, the sliding blocks are provided with adjusting grooves inside, the adjusting grooves are provided with adjusting blocks inside, the two adjusting blocks are fixedly connected with the two sides of the lead-out plate respectively, and the adjusting grooves are fixedly provided with fixed rods inside, the fixed rods penetrate through the adjusting blocks, and the movement and adjustment of the lead-out plate are limited and guided.

[0010] Preferably, the lead-out plate is provided with an L-shaped limiting plate on one side, the L-shaped limiting plate is arranged at the top end of the heat-conducting shell, the vertical part of the L-shaped limiting plate is provided with a limiting rod outside, the heat-conducting shell is provided with a plurality of limiting grooves on one side, and one end of the limiting rod penetrates through the vertical part of the L-shaped limiting plate and extends into one of the limiting grooves, so that the lead-out plate is limited and fixed.

[0011] Preferably, the other end of the limiting rod is fixedly provided with a pulling block, and the outer end of the limiting rod is sleeved with a spring, and the two ends of the spring are fixedly connected with the inner side of the pulling block and the outer side of the vertical part of the L-shaped limiting plate respectively, so that the pulling of the limiting rod and the automatic reset are facilitated.

[0012] Preferably, the bottom end of the heat-conducting shell is fixedly connected with a mounting plate, so that the resistor is mounted and fixed.

[0013] In the above technical scheme, the technical effects and advantages of the utility model are provided:

[0014] The two protective belts can be automatically wound and released along with the adjustment of the positions of the lead-out plate and the second lead-out end, the dustproof effect of the connecting window is good, the accumulation of dust on the connecting window is avoided, the use of the resistor is stable and safe, and the adjustment and fixing processes of the lead-out plate are simple and convenient, and the use effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments or prior art, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can be obtained by those skilled in the art according to these drawings.

[0016] Figure 1 It is a whole structure schematic view of the utility model;

[0017] Figure 2 It is a whole structure schematic view of the utility model; Figure 1 It is an enlarged structure schematic view of A;

[0018] Figure 3 It is a whole three-dimensional sectional structure schematic view of the utility model;

[0019] Figure 4 It is the three-dimensional structure schematic view of the porcelain tube and the resistance wire of the utility model;

[0020] Figure 5 It is the connection structure schematic view of the lead-out plate, the second lead-out end and the protective belt of the utility model;

[0021] Figure 6 It is the connection structure schematic view of the winding rod, the protective belt and the elastic rope of the utility model;

[0022] Figure 7 It is the three-dimensional sectional structure schematic view of the sliding block of the utility model.

[0023] Mark explanation:

[0024] 1, heat conduction shell;2, porcelain tube;3, resistance wire;4, first lead-out end;5, connection window;6, lead-out plate;7, second lead-out end;8, fixed plate;9, winding rod;10, protective belt;11, elastic rope;12, sliding slot;13, sliding block;14, adjusting groove;15, adjusting block;16, fixed rod;17, L type limiting plate;18, limiting rod;19, limiting slot;20, pull block;21, spring;22, mounting plate;23, communication port. Specific implementation

[0025] In order to make the technical personnel of the prior art better understand the technical scheme of the utility model, the utility model will be further introduced in detail below with the accompanying drawings.

[0026] The utility model provides a kind of painting wire winding resistor as shown in Figures 1 to 7 Including:

[0027] Heat conduction shell 1, heat conduction shell 1 bottom end fixedly connected with mounting plate 22, heat conduction shell 1 inside is equipped with porcelain tube 2, porcelain tube 2 outer end is wound with resistance wire 3, and resistance wire 3 one end is connected with first lead-out end 4, and first lead-out end 4 one end extends to the outside of one end of heat conduction shell 1, and resistance wire 3 outer end is provided with connection window 5, and heat conduction shell 1 inside is equipped with lead-out plate 6, and lead-out plate 6 bottom end is connected with resistance wire 3 by connection window 5, and lead-out plate 6 top end extends to the top end of heat conduction shell 1 and is connected with second lead-out end 7;

[0028] Four fixed plates 8, and rotatingly connected with winding rod 9 between two fixed plates 8 of same side, and protective belt 10 is wound on the outer end of winding rod 9, and two protective belts 10 one end is fixedly connected with the bottom end of lead-out plate 6 on both sides respectively, and protective belt 10 is arranged at the top end of connection window 5, and two elastic ropes 11 are arranged on the outer end of winding rod 9, and elastic rope 11 one end is fixedly connected with the outer end of winding rod 9, and the other end of winding rod 9 is fixedly connected with fixed plate 8, and the top end of heat conduction shell 1 is provided with communication port 23, and lead-out plate 6 top end passes through from the inside of communication port 23.

[0029] The two side walls inside the communication port 23 are each provided with a sliding groove 12, the sliding groove 12 is internally provided with a sliding block 13, the inner side of the sliding block 13 is provided with an adjusting groove 14, the adjusting groove 14 is internally provided with an adjusting block 15, the two adjusting blocks 15 are respectively fixedly connected with the two sides of the lead-out plate 6, and the adjusting groove 14 is fixedly provided with a fixed rod 16 penetrating through the adjusting block 15.

[0030] The lead-out plate 6 is provided with an L-shaped limiting plate 17 at one side, the L-shaped limiting plate 17 is arranged at the top end of the heat-conducting shell 1, the outer side of the vertical part of the L-shaped limiting plate 17 is provided with a limiting rod 18, a plurality of limiting grooves 19 are formed in one side of the heat-conducting shell 1, one end of the limiting rod 18 penetrates through the vertical part of the L-shaped limiting plate 17 and extends into one of the limiting grooves 19, the other end of the limiting rod 18 is fixedly provided with a pulling block 20, and the outer end of the limiting rod 18 is sleeved with a spring 21, and the two ends of the spring 21 are respectively fixedly connected with the inner side of the pulling block 20 and the outer side of the vertical part of the L-shaped limiting plate 17.

[0031] The pulling block 20 is pulled outward, the pulling block 20 drives the limiting rod 18 to move outward and stretch the spring 21, when one end of the limiting rod 18 leaves the inside of one limiting groove 19, the lead-out plate 6 is pulled upward, the lead-out plate 6 drives the L-shaped limiting plate 17 and the two adjusting blocks 15 to move upward, then the lead-out plate 6 is moved, the lead-out plate 6 drives the sliding block 13 to move in the sliding groove 12, at this time, the lead-out plate 6 drives the two protective belts 10 to move, one of the protective belts 10 is unwound from the outer end of one winding rod 9, and the other protective belt 10 is wound by the other winding rod 9 under the action of the elastic rope 11, at this time, the two protective belts 10 are always arranged at the top end of the connecting window 5, the connecting window 5 can be protected, when the resistance adjustment is completed, the lead-out plate 6 is pushed downward, the bottom end of the lead-out plate 6 is connected with the connecting window 5, then the pulling block 20 is released, the pulling block 20 drives one end of the limiting rod 18 to be inserted into the other limiting groove 19 under the elastic force of the spring 21, so that the lead-out plate 6 and the second lead-out end 7 can be limited and fixed.

[0032] The two protective belts 10 are used to protect the outside of the connecting window 5, the two protective belts 10 can be automatically wound and unwound according to the adjustment of the positions of the lead-out plate 6 and the second lead-out end 7, the dustproof effect of the connecting window 5 is good, the situation that dust is accumulated on the connecting window 5 is avoided, the resistor is stable and safe to use, the adjustment and fixing processes of the lead-out plate 6 are simple and convenient, and the use effect is good, and the embodiment specifically solves the problems that in the prior art, the long and narrow window formed in the resistance wire paint layer of the adjustable paint-coated wire-wound resistor is generally not provided with a protective structure, the conductive resistance wire part is exposed, dust is accumulated on the window after long-time use, the safe use of the resistor is affected, and the use effect is not good.

[0033] The above has described certain exemplary embodiments of the present application by way of illustration only, and it is needless to say that the described embodiments can be modified in various ways without departing from the spirit and scope of the present application for those skilled in the art. Therefore, the above drawings and description are illustrative in nature, and should not be construed as limiting the scope of protection of the present application.

Claims

1. A painted wirewound resistor, characterized in that, The utility model relates to a heat conduction shell (1) is installed with porcelain pipe (2) inside, porcelain pipe (2) outside end is wound with resistance wire (3), resistance wire (3) one end is connected with first lead-out end (4), first lead-out end (4) one end extends to heat conduction shell (1) one end outside, and resistance wire (3) outside end is provided with connecting window (5), and heat conduction shell (1) inside is equipped with lead-out plate (6), and lead-out plate (6) bottom end is connected with resistance wire (3) through connecting window (5), and lead-out plate (6) top end extends to heat conduction shell (1) top and is connected with second lead-out end (7); Four fixed plates (8) are rotatably connected with winding rods (9) between two fixed plates (8) on the same side, the winding rods (9) are wound with protective belts (10) on the outer ends, two protective belts (10) are fixedly connected with the bottom ends of the lead-out plates (6) on both sides, respectively, the protective belts (10) are arranged at the top ends of the connecting windows (5), and the outer ends of the winding rods (9) are provided with two elastic ropes (11), one ends of the elastic ropes (11) are fixedly connected with the outer ends of the winding rods (9), and the other ends of the winding rods (9) are fixedly connected with the fixed plates (8). The top end of the heat conduction shell (1) is provided with a communication port (23), and the top end of the lead-out plate (6) passes through the inside of the communication port (23).

2. A painted wirewound resistor according to claim 1, characterized in that: Both sides of the inside of the communication port (23) are provided with sliding grooves (12), the sliding grooves (12) are provided with sliding blocks (13) inside, the sliding blocks (13) are provided with adjusting grooves (14) on the inner sides, the adjusting grooves (14) are provided with adjusting blocks (15) inside, the adjusting blocks (15) are fixedly connected with the two sides of the lead-out plate (6), respectively, the adjusting grooves (14) are fixedly provided with fixed rods (16) inside, and the fixed rods (16) penetrate through the adjusting blocks (15).

3. A painted wirewound resistor according to claim 2, characterised in that: One side of the lead-out plate (6) is provided with an L-shaped limiting plate (17), the L-shaped limiting plate (17) is arranged at the top end of the heat conduction shell (1), the outer side of the vertical part of the L-shaped limiting plate (17) is provided with a limiting rod (18), one side of the heat conduction shell (1) is provided with a plurality of limiting grooves (19), one end of the limiting rod (18) penetrates through the vertical part of the L-shaped limiting plate (17) and extends into one of the limiting grooves (19).

4. A painted wirewound resistor according to claim 1, characterized in that: The other end of the limiting rod (18) is fixedly provided with a pulling block (20), the outer end of the limiting rod (18) is sleeved with a spring (21), and the two ends of the spring (21) are fixedly connected with the inner side of the pulling block (20) and the outer side of the vertical part of the L-shaped limiting plate (17), respectively.

5. A painted wirewound resistor according to claim 4, characterised in that: The bottom end of the heat conduction shell (1) is fixedly connected with a mounting plate (22).

6. A painted wirewound resistor according to claim 1, characterized in that: ​

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