High-precision wire-wound preset potentiometer

Abstract

The utility model relates to the technical field of winding pre-adjusting potentiometers, discloses a high-precision winding pre-adjusting potentiometer, and solves the problems that a knob cover is clamped with a rotary column, so that the knob cover can be conveniently replaced, the friction force between a clamping pin and a clamping groove is difficult to guarantee, the synchronism of the knob cover and the rotary column during rotation is reduced, and the rotating accuracy is reduced. And the precision of the preset potentiometer is reduced. Comprising a pre-adjusting potentiometer body and an anti-skid knob, the pre-adjusting potentiometer body is rotationally connected with a rotating rod, a tooth groove is formed in the surface of the rotating rod, the tooth groove is connected with a rubber ring in a clamped mode through a rack, the bottom end of the rotating rod is fixedly connected with a baffle, and the bottom end of the baffle is connected with the anti-skid knob in a clamped mode through two inserting plates; the two sliding blocks can be supported through the supporting springs and prevented from loosening, the clamping effect of the two limiting blocks and the two limiting grooves can be kept, the two limiting blocks can limit the two inserting plates respectively, stability is good, and the two inserting plates can transmit torque.

Description

Technical Field

[0001] The utility model relates to the technical field of wire-wound pre-adjusting potentiometers, in particular to a high-precision wire-wound pre-adjusting potentiometer. Background Art

[0002] Potentiometer is a kind of variable resistor. It is a resistor element with three terminals and the resistance value can be adjusted according to a certain change rule. The pre-adjustment potentiometer is made of resistance wire wound on a ring frame. It is usually placed outside the equipment to make some basic adjustments, such as the brightness, contrast, chroma, volume, etc. of some old models of TVs. Once the pre-adjustment potentiometer is in the circuit, the adjustment position is sealed with wax and will not be adjusted under normal circumstances;

[0003] According to the "high-precision potentiometer" provided by Chinese patent authorization announcement No. CN206210504U, the knob cover can be easily replaced by snapping it into place with the rotary column. However, the clamping foot needs to be snapped into the slot, and it is difficult to ensure the friction between the clamping foot and the slot, which in turn reduces the synchronization of the knob cover and the rotary column during rotation, resulting in a reduction in the accuracy of the preset potentiometer. When the knob cover is subjected to force, the clamping foot is likely to fall off the slot, resulting in poor stability. Utility Model Content

[0004] The utility model provides a high-precision wirewound preset potentiometer, which solves the technical problem that the knob cover can be easily replaced by clamping the knob cover with the rotary column, but it is difficult to ensure the friction between the clamping foot and the clamping slot, which will reduce the synchronization when the knob cover and the rotary column rotate, resulting in reduced accuracy of the preset potentiometer.

[0005] To solve the above technical problems, the utility model provides a high-precision wirewound preset potentiometer, comprising a preset potentiometer body and an anti-slip knob, the preset potentiometer body being rotatably connected to a rotating rod, the surface of the rotating rod being provided with a tooth groove, the tooth groove being connected to a rubber ring by means of a rack, the bottom end of the rotating rod being fixedly connected to a baffle, the bottom end of the baffle being connected to an anti-slip knob by means of two plug-in plates, the surfaces of the two plug-in plates being provided with a limiting groove, the bottom end of the anti-slip knob being fixedly provided with a convex shell, the interior of the convex shell being provided with a supporting spring, both ends of the supporting spring being provided with sliding blocks, one side of the two sliding blocks being fixedly provided with a limiting block, the two limiting blocks being respectively engaged with the two limiting grooves, and one side of the two sliding blocks being fixedly provided with a push rod.

[0006] Preferably, a shaping sleeve is fixedly provided in the middle of the top of the preset potentiometer body, the outer wall of the rubber ring is fixedly connected to the inner wall of the shaping sleeve, and the rack is located on the inner wall of the rubber ring.

[0007] Preferably, a protective plate is fixedly connected to the bottom end of the convex shell by screws, a rod groove is provided on the surface of the protective plate, and the two push rods are slidably connected to the two sides of the rod groove respectively.

[0008] Preferably, the top ends of the two plug plates are fixedly connected to the two sides of the bottom end of the baffle respectively, and the bottom end of the anti-slip knob is provided with two slots, and the two plug plates are respectively engaged and connected with the two slots.

[0009] Preferably, the two sliders are both slidably connected to the inside of the convex shell, and spring columns are fixedly provided on the other sides of the two sliders, and both ends of the support spring are respectively engaged and connected with the two spring columns.

[0010] Preferably, the rotating rod is coaxial with the shaping sleeve, and the rotating rod is made of stainless steel.

[0011] Compared with the related art, the beneficial effects of the utility model are:

[0012] The utility model provides a high-precision wirewound preset potentiometer, which can support two sliders and prevent them from loosening through a supporting spring, can maintain the clamping effect of the two limit blocks and the two limit grooves, the two limit blocks can limit the two plugging plates respectively, have good stability, and can prevent the anti-slip knob from falling off due to force, and by clamping the two plugging plates with the anti-slip knob, when the anti-slip knob is rotated, the two plugging plates can transmit torque, and can maintain the synchronization of the rotation of the rotating rod and the anti-slip knob, thereby improving the accuracy of the preset potentiometer body, and by clamping the tooth groove of the rotating rod with the rack of the rubber ring, the friction force and rotation resistance of the rotating rod can be increased, which can play a damping role, improve the stability of the rotating rod, and avoid the random rotation of the rotating rod caused by the shaking of the electrical appliance, which is safe and reliable;

[0013] By pushing the two push rods in opposite directions, the two sliders can compress the support springs, which makes it easy to pull the two limit blocks out of the two limit grooves respectively, and the two plug plates can be stopped and locked, which makes it easy to remove the anti-slip knob from the two plug plates. The anti-slip knob can be quickly disassembled, and by keeping the support springs in a compressed state and inserting the two plug plates into the two slots of the anti-slip knob, the support springs can push the two limit blocks into the two limit grooves, which can lock the anti-slip knob, making it easy to quickly install the anti-slip knob. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the rotating rod of the utility model;

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the anti-slip knob of the utility model;

[0017] Figure 4This is a schematic diagram of the structure of the rubber ring of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the baffle of the utility model.

[0019] Numbers in the figure: 1. Pre-adjustment potentiometer body; 2. Shaping sleeve; 3. Rubber ring; 4. Rack; 5. Turn bar; 6. Tooth groove; 7. Baffle; 8. Insert plate; 9. Limit groove; 10. Anti-slip knob; 11. Convex shell; 12. Support spring; 13. Spring column; 14. Slider; 15. Limit block; 16. Push rod; 17. Protective plate; 18. Rod groove; 19. Groove. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5 A high-precision wire-wound preset potentiometer comprises a preset potentiometer body 1 and an anti-slip knob 10. The preset potentiometer body 1 is rotatably connected to a rotating rod 5. A tooth groove 6 is provided on the surface of the rotating rod 5. The tooth groove 6 is connected to a rubber ring 3 through a rack 4. A baffle 7 is fixedly connected to the bottom end of the rotating rod 5. The bottom end of the baffle 7 is connected to the anti-slip knob 10 through two plug-ins 8. Limiting grooves 9 are provided on the surfaces of the two plug-ins 8. A convex shell 11 is fixedly provided at the bottom end of the anti-slip knob 10. A support spring 12 is provided inside the convex shell 11. Slide blocks 14 are provided at both ends of the support spring 12. A limit block 15 is fixedly provided on one side of the two sliders 14, and the two limit blocks 15 are respectively engaged with the two limit grooves 9. A push rod 16 is fixedly provided on one side of the two sliders 14. The two sliders 14 can be supported by the support spring 12 to prevent them from loosening, and the engagement effect of the two limit blocks 15 and the two limit grooves 9 can be maintained. The two limit blocks 15 can limit the two plug plates 8 respectively. By engaging the two plug plates 8 with the anti-slip knob 10, when the anti-slip knob 10 is rotated, the two plug plates 8 can transmit torque, and the synchronization of the rotation of the rotating rod 5 and the anti-slip knob 10 can be maintained.

[0022] See also Figure 2 and Figure 4 A shaping sleeve 2 is fixedly provided in the middle of the top of the preset potentiometer body 1, the outer wall of the rubber ring 3 is fixedly connected to the inner wall of the shaping sleeve 2, and the rack 4 is located on the inner wall of the rubber ring 3. The shaping sleeve 2 can support and limit the rubber ring 3 to prevent the rubber ring 3 from falling off.

[0023] See also Figure 3 The bottom end of the convex shell 11 is fixedly connected with a protective plate 17 by screws. A rod groove 18 is opened on the surface of the protective plate 17. The two push rods 16 are slidably connected to the two sides of the rod groove 18 respectively. The protective plate 17 can shield the support spring 12 and the slider 14, and can provide protection for the support spring 12 and the slider 14.

[0024] See also Figure 3 and Figure 5 The top ends of the two plug plates 8 are fixedly connected to the two sides of the bottom end of the baffle 7 respectively. The bottom end of the anti-slip knob 10 is provided with two slots. The two plug plates 8 are respectively engaged with the two slots. The plug plates 8 can be passed through the slots, and the plug plates 8 can transmit torque.

[0025] See also Figure 3 The two sliders 14 are both slidably connected to the inside of the convex shell 11, and the other sides of the two sliders 14 are fixed with spring columns 13. The two ends of the support spring 12 are respectively engaged with the two spring columns 13. The two spring columns 13 can limit the two ends of the support spring 12 to prevent the support spring 12 from falling off.

[0026] See also Figure 1 The rotating rod 5 is coaxial with the shaping sleeve 2. The rotating rod 5 is made of stainless steel and has good durability. Since the rotating rod 5 is coaxial with the shaping sleeve 2, the rotating rod 5 can be prevented from being eccentric.

[0027] In summary, in the present invention, the staff first pushes the two push rods 16 in opposite directions, so that the two sliders 14 compress the support springs 12 and shorten the distance between the two limit blocks 15, and then inserts the two plug plates 8 into the two limit slots 9 of the anti-slip knob 10 respectively, and then releases the two push rods 16, and the support springs 12 can push the two limit blocks 15 into the two limit slots 9. Under the steady pressure of the support springs 12, the two limit blocks 15 can lock the anti-slip knob 10, so that the anti-slip knob 10 can be quickly installed. The staff can control the anti-slip knob 10 by rotating the rotating rod 5 through the anti-slip knob 10 through the preset potentiometer body 1. Electrical appliance. During this process, the two plug plates 8 can transmit torque, maintain the synchronization of rotation of the rotating rod 5 and the anti-slip knob 10, and ensure the accuracy of the preset potentiometer body 1. The rubber ring 3 and the rack 4 can increase the friction and rotation resistance of the rotating rod 5, and can play a damping role, which can prevent the rotating rod 5 from rotating at will due to the shaking of the electrical appliance. When the anti-slip knob 10 needs to be removed, the staff pushes the two push rods 16 in opposite directions again, so that the two sliders 14 compress the supporting springs 12 and pull the two limit blocks 15 out of the two limit grooves 9 respectively, so that the anti-slip knob 10 can be quickly removed from the two plug plates 8.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision wire-wound preset potentiometer, comprising a preset potentiometer body (1) and an anti-slip knob (10), characterized in that: The preset potentiometer body (1) is rotatably connected to a rotating rod (5), a tooth groove (6) is provided on the surface of the rotating rod (5), and the tooth groove (6) is connected to a rubber ring (3) through a rack (4). The bottom end of the rotating rod (5) is fixedly connected to a baffle (7), and the bottom end of the baffle (7) is connected to an anti-slip knob (10) through two plug plates (8). The surfaces of the two plug plates (8) are provided with limiting grooves (9). The bottom end of the anti-slip knob (10) is fixedly provided with a convex shell (11), and a support spring (12) is provided inside the convex shell (11). Both ends of the support spring (12) are provided with sliders (14), and one side of the two sliders (14) is fixedly provided with a limiting block (15), and the two limiting blocks (15) are respectively connected to the two limiting grooves (9). One side of the two sliders (14) is fixedly provided with a push rod (16).

2. A high-precision wirewound preset potentiometer according to claim 1, characterized in that: A shaping sleeve (2) is fixedly provided in the middle of the top of the preset potentiometer body (1); the outer wall of the rubber ring (3) is fixedly connected to the inner wall of the shaping sleeve (2); and the rack (4) is located on the inner wall of the rubber ring (3).

3. A high-precision wirewound preset potentiometer according to claim 1, characterized in that: The bottom end of the convex shell (11) is fixedly connected with a protective plate (17) by means of screws, a rod groove (18) is provided on the surface of the protective plate (17), and the two push rods (16) are respectively slidably connected to the two sides of the rod groove (18).

4. A high-precision wirewound preset potentiometer according to claim 1, characterized in that: The top ends of the two plug plates (8) are fixedly connected to the two sides of the bottom end of the baffle (7), and the bottom end of the anti-slip knob (10) is provided with two slots, and the two plug plates (8) are respectively engaged and connected to the two slots.

5. A high-precision wirewound preset potentiometer according to claim 1, characterized in that: The two sliders (14) are both slidably connected to the inside of the convex shell (11), and the other sides of the two sliders (14) are fixedly provided with spring columns (13), and the two ends of the support spring (12) are respectively engaged and connected with the two spring columns (13).

6. A high-precision wirewound preset potentiometer according to claim 2, characterized in that: The rotating rod (5) is coaxial with the shaping sleeve (2), and the rotating rod (5) is made of stainless steel.

Images