CN219286130U

CN219286130U - Rotary potentiometer

Info

Publication number: CN219286130U
Application number: CN202320260330.9U
Authority: CN
Inventors: 蔡金林
Original assignee: Shenzhen Jinertai Electronics Co ltd
Current assignee: Shenzhen Jinertai Electronics Co ltd
Priority date: 2023-02-09
Filing date: 2023-02-09
Publication date: 2023-06-30
Anticipated expiration: 2033-02-09

Abstract

The utility model discloses a rotary potentiometer which comprises a first shell, a second shell, a brush mounting plate, a brush, a substrate, a carbon film resistor, a first terminal, a second terminal, a third terminal and a rotating shaft, wherein the second shell is embedded in the lower end part of the first shell, a containing groove is concavely arranged at the upper end part of the second shell, the brush mounting plate is rotatably arranged at the bottom of the containing groove, the brush is detachably arranged on the upper end wall of the brush mounting plate, the carbon film resistor is arranged on the lower end wall of the substrate, a conducting ring is arranged on the substrate positioned on the inner side of the carbon film resistor along the circumferential direction, the first contact spring sheet and the second contact spring sheet are respectively connected with the carbon film resistor and the conducting ring in a sliding and abutting mode, and the lower end part of the rotating shaft is detachably and fixedly connected with the brush mounting plate. The utility model can make the assembly of the potentiometer more convenient and faster, and can effectively reduce the abrasion to the carbon film sheet resistor body and the conducting ring, and has low noise, long service life and strong practicability.

Description

Rotary potentiometer

Technical Field

The utility model relates to the technical field of potentiometers, in particular to a rotary potentiometer.

Background

The potentiometer is an electronic component and generally comprises three leading-out ends, and consists of a sliding shaft (sliding sheet), a resistor body, a shell resistor body, three leading-out ends and the like, wherein the resistance value of the sliding shaft changes according to a certain change rule, and meanwhile, the resistance value or other physical quantity which has a certain relation with the displacement is obtained at an output end, so that the potentiometer can be used as a three-end element or a two-end element. The latter can be regarded as a variable resistor, which is called a potentiometer, since its role in the circuit is to obtain an output voltage which is in a certain relation to the input voltage (applied voltage). The potentiometer has various characteristics of small volume, long service life, high reliability, simple structure and the like, and is applied to various fields.

However, most of the existing potentiometers on the market are complex in structure, complicated in assembly and low in assembly efficiency, and therefore, we propose a rotary potentiometer easy to assemble.

Disclosure of Invention

The utility model mainly aims to provide a rotary potentiometer, and aims to solve the technical problems of complicated assembly and low efficiency of the conventional potentiometer.

In order to achieve the above object, the rotary potentiometer provided by the utility model comprises a first shell, a second shell, a brush mounting plate, a brush, a substrate, a carbon film resistor, a first terminal, a second terminal, a third terminal and a rotary shaft, wherein the second shell is embedded in the lower end part of the first shell, a containing groove is concavely arranged at the upper end part of the second shell, the brush mounting plate is rotatably arranged at the bottom of the containing groove, the brush is detachably arranged on the upper end wall of the brush mounting plate and rotates along with the brush mounting plate, a first contact spring sheet and a second contact spring sheet are respectively arranged on two sides of one end of the brush in an upward protruding way, the substrate is covered on the upper end part of the containing groove, a first supporting part and a second supporting part are respectively arranged on the upper end part and the lower end part of the brush mounting plate in a protruding way, the first supporting part and the second supporting part are respectively arranged in a sliding abutting mode with the lower end wall of the substrate and the inner bottom wall of the accommodating groove, the carbon film sheet resistor is arranged on the lower end wall of the substrate, a conducting ring is arranged on the substrate positioned on the inner side of the carbon film sheet resistor along the circumferential direction, the first contact elastic sheet and the second contact elastic sheet are respectively connected with the carbon film sheet resistor and the conducting ring in a sliding abutting mode, the rear end parts of the first terminal, the second terminal and the third terminal are respectively fixed on the front end part of the substrate through rivets, the first terminal and the third terminal are respectively electrically connected with the two ends of the carbon film sheet resistor, the second terminal is electrically connected with the conducting ring, the front end parts of the first terminal, the second terminal and the third terminal are respectively extended out of the outer peripheral wall of the first housing, the upper end wall of the first shell is concavely provided with a sliding hole, the rotating shaft is rotatably embedded in the sliding hole, the upper end wall of the base plate is concavely provided with a through hole, the lower end part of the rotating shaft rotatably penetrates through the through hole, and the lower end part of the rotating shaft is detachably and fixedly connected with the brush mounting plate.

Optionally, the portable electronic device further comprises rivets, wherein a rivet positioning hole is concavely formed in two sides of the first shell and the second shell respectively, the rivets are respectively arranged in the rivet positioning holes in a penetrating mode, and the first shell and the second shell are fixedly connected through the rivets.

Optionally, the both sides of base plate are concave respectively to be equipped with first spacing groove, the rivet inlays respectively and locates first spacing inslot sets up.

Optionally, a first arc-shaped abutting part and a second arc-shaped abutting part are respectively and convexly arranged at the upper ends of the first contact spring piece and the second contact spring piece, and the first arc-shaped abutting part and the second arc-shaped abutting part are respectively in sliding abutting connection with the carbon film sheet resistor body and the conducting ring.

Optionally, the first contact spring plate is concavely provided with a plurality of open slots extending along the length direction along the width direction.

Optionally, the upper end wall of the second shell is concavely provided with a plurality of second limiting grooves, and the first terminal, the second terminal and the third terminal are respectively arranged in the second limiting grooves.

Optionally, a positioning column is respectively protruding on two sides of the upper end wall of the brush mounting plate, a positioning hole is respectively concavely formed on two sides of the brush, and the positioning columns are respectively embedded in the positioning holes.

Optionally, the lower tip of rotation axis is equipped with a grafting portion, the upper end of first supporting part is concave to be equipped with a grafting groove, grafting portion and grafting groove's appearance all is oval structure setting, grafting portion detachably inlays and locates the setting in the grafting groove.

Optionally, two sides of the peripheral wall of the first shell are respectively provided with a mounting plate in a protruding mode, and the mounting plates are respectively provided with a screw mounting hole in a recessed mode.

Optionally, the outer peripheral wall of the bottom of the accommodating groove is convexly provided with a first limiting protrusion, the outer side of the lower end wall of the brush mounting plate is convexly provided with a second limiting protrusion, and the second limiting protrusion can be in butt joint with the first limiting protrusion.

The technical scheme of the utility model has the following beneficial effects: according to the technical scheme of the utility model, a containing groove is concavely arranged at the upper end part of the second shell, the electric brush mounting plate is rotatably arranged at the bottom of the containing groove, the electric brush is detachably arranged on the upper end wall of the electric brush mounting plate and rotates along with the electric brush mounting plate, a first contact spring piece and a second contact spring piece are respectively and convexly arranged at two sides of one end of the electric brush, a substrate cover is arranged at the upper end part of the containing groove, a first supporting part and a second supporting part are respectively and convexly arranged at the upper end part and the lower end part of the electric brush mounting plate, the first supporting part and the second supporting part are respectively and slidably abutted with the lower end wall of the substrate and the inner bottom wall of the containing groove, the carbon film resistor body is arranged on the lower end wall of the substrate in a circular arc structure, a conductive circular ring is arranged on the substrate positioned at the inner side of the carbon film resistor body along the circumferential direction, the first contact spring and the second contact spring are respectively connected with the carbon film resistor body and the conductive circular ring in a sliding and abutting mode, the rear end parts of the first terminal, the second terminal and the third terminal are respectively fixed at the front end part of the substrate through rivets, the first terminal and the third terminal are respectively electrically connected with the two ends of the carbon film resistor body, the second terminal is electrically connected with the conductive circular ring, the front end parts of the first terminal, the second terminal and the third terminal respectively extend out of the peripheral wall of the first shell, the upper end wall of the first shell is concavely provided with a sliding hole, the rotating shaft is rotatably embedded in the sliding hole, the upper end wall of the substrate is concavely provided with a through hole, the lower end part of the rotating shaft is rotatably arranged in the through hole in a penetrating mode, and the lower end part of the rotating shaft is detachably and fixedly connected with the electric brush mounting plate, so that the assembly of the potentiometer is more convenient and fast, the assembly is firm and reliable, the production efficiency is improved, the production period is shortened, the production cost is reduced, the abrasion to the carbon film resistor and the conducting ring can be effectively reduced, the contact is reliable, the noise is low, the service life is long, and the practicability is strong.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of the overall structure of a rotary potentiometer according to the present utility model;

FIG. 2 is a schematic diagram showing the overall structure of a rotary potentiometer according to another aspect of the present utility model;

fig. 3 is an exploded view of a rotary potentiometer according to the present utility model;

FIG. 4 is a schematic diagram showing another exploded structure of a rotary potentiometer according to the present utility model;

fig. 5 is a schematic structural diagram of a brush of a rotary potentiometer according to the present utility model.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a rotary potentiometer.

As shown in fig. 1 to 5, in an embodiment of the present utility model, the rotary potentiometer includes a first housing 101, a second housing 102, a brush mounting plate 103, a brush 104, a substrate 105, a carbon film resistor 106, a first terminal 107, a second terminal 108, a third terminal 109, and a rotating shaft 110, the second housing is embedded in a lower end portion of the first housing, a receiving slot 1021 is concavely disposed in an upper end portion of the second housing, the brush mounting plate is rotatably disposed at a bottom portion of the receiving slot, the brush is detachably disposed on an upper end wall of the brush mounting plate and rotates with the brush mounting plate, a first contact spring 1041 and a second contact spring 1042 are respectively disposed on two sides of one end of the brush 104 in an upward protruding manner, the substrate is covered on an upper end portion of the receiving slot, a first supporting portion 1031 and a second supporting portion 1032 are respectively disposed on an upper end portion and a lower end portion of the brush mounting plate 103 in a protruding manner, the first support part and the second support part are respectively arranged in a sliding abutting mode with the lower end wall of the substrate and the inner bottom wall of the accommodating groove, the carbon film sheet resistor body is arranged in a circular arc structure, the carbon film sheet resistor body 106 is arranged on the lower end wall of the substrate, a conducting ring 1051 is arranged on the substrate 105 positioned on the inner side of the carbon film sheet resistor body 106 along the circumferential direction, the first contact spring piece and the second contact spring piece are respectively connected with the carbon film sheet resistor body and the conducting ring in a sliding abutting mode, the rear end parts of the first terminal, the second terminal and the third terminal are respectively fixed on the front end part of the substrate through rivets, the first terminal and the third terminal are respectively connected with the two ends of the carbon film sheet resistor body, the second terminal is electrically connected with the conducting ring, the front end parts of the first terminal, the second terminal and the third terminal are respectively extended out of the outer peripheral wall of the first shell, a sliding hole 1011 is concavely arranged on the upper end wall of the first shell 101, the rotating shaft 110 is rotatably embedded in the sliding hole, the upper end wall of the base plate 105 is concavely provided with a through hole 1052, the lower end part of the rotating shaft is rotatably arranged through the through hole, and the lower end part of the rotating shaft is detachably and fixedly connected with the brush mounting plate.

Referring to fig. 3 and 4, in this embodiment, a rivet 111 is further included, two sides of the first housing and the second housing are respectively concavely provided with a rivet positioning hole 112, the rivets are respectively disposed in the rivet positioning holes in a penetrating manner, the first housing and the second housing are fixedly connected through rivets, and the rivet connection process is simple, firm and reliable in connection, vibration-resistant and impact-resistant, and can be riveted by a machine, so that the assembly efficiency of the potentiometer is high, the production cost can be reduced, the production period is shortened, the cost performance is 1/4 of the cost of using screws, and the speed is 3 times faster than the screw connection speed.

Referring to fig. 3, in the present embodiment, first limiting grooves 1053 are concavely formed on two sides of the substrate 105, and rivets are respectively embedded in the first limiting grooves to fix the substrate, so as to prevent the substrate from rotating and loosening, and make the potentiometer assembly more firm and reliable.

Referring to fig. 5, in the present embodiment, a first arc-shaped abutting portion 1043 and a second arc-shaped abutting portion 1044 are respectively protruding from the upper ends of the first contact spring 1041 and the second contact spring 1042, and are respectively slidably abutted to the carbon film resistor and the conductive ring, so that sliding between the first contact spring 1041 and the second contact spring 1042 and the carbon film resistor and the conductive ring is smoother, wear to the carbon film resistor and the conductive ring can be reduced, the service life of the potentiometer is prolonged, and contact is reliable.

Referring to fig. 5, in the present embodiment, a plurality of open slots 1045 extending along the length direction are concavely formed in the width direction of the first contact spring, and by providing a plurality of open slots, the sliding friction force between the first contact spring and the carbon film resistor can be reduced, so that the moving noise can be reduced, and the contact resistance between the first contact spring and the carbon film resistor can be reduced.

Referring to fig. 3, in the present embodiment, a plurality of second limiting grooves 1022 are concavely formed in an upper end wall of the second housing, and the first terminal, the second terminal and the third terminal are respectively disposed in the second limiting grooves.

Referring to fig. 3, in the present embodiment, two sides of an upper end wall of the brush mounting plate 103 are respectively provided with a positioning post 1033 in a protruding manner, two sides of the brush 104 are respectively provided with a positioning hole 1046 in a recessed manner, and the positioning posts are respectively embedded in the positioning holes to perform alignment function, so that the assembly of the brush is more convenient and quicker.

Referring to fig. 3, in the present embodiment, a plugging portion 1101 is disposed at a lower end of the rotating shaft 110, a plugging groove 1034 is concavely disposed at an upper end of the first supporting portion 1031, and the plugging portion and the plugging groove are both configured in an elliptical structure, and the plugging portion is detachably embedded in the plugging groove, so that the assembly and disassembly between the rotating shaft and the plugging groove are more convenient and quick.

Referring to fig. 1, in the present embodiment, two sides of the outer peripheral wall of the first housing 101 are respectively provided with a mounting plate 1012, and the mounting plates are respectively provided with a screw mounting hole 1013 in a recessed manner, so as to facilitate the mounting and fixing of the potentiometer.

Referring to fig. 4, in the present embodiment, a first limiting protrusion (not shown) is protruding from an outer peripheral wall of the bottom of the accommodating groove 1021, and a second limiting protrusion 1035 is protruding from an outer side of a lower end wall of the brush mounting plate 103, and the second limiting protrusion can be abutted with the first limiting protrusion to limit a rotation angle of the brush mounting plate, so as to prevent the rotation of the rotating shaft beyond 360 °.

Specifically, in this embodiment, the brush is made of a metal material, such as beryllium bronze, phosphor bronze, zinc white copper, silver-chromium alloy, platinum-nickel alloy, platinum-iridium alloy, iridium-pound alloy, gold-silver-copper alloy, etc., and the conductive ring is made of brass, aluminum or aluminum alloy.

Specifically, the working principle and the working process of the utility model are as follows: the carbon film sheet resistor of the potentiometer is provided with two fixed ends at two sides, a first terminal and a third terminal are respectively electrically connected, a conducting ring is electrically connected with a second terminal, the second terminal is electrically connected with an electric brush through the conducting ring, when a voltage is externally applied between the two fixed ends of the carbon film sheet resistor, the position of a first contact spring sheet on the carbon film sheet resistor is changed by manually adjusting a rotating shaft, the resistance value between a movable contact and any fixed end is changed, and a voltage which is in a certain relation with the position of the movable contact can be obtained between the movable contact and the fixed contact, so that the voltage and the current are changed.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. The rotary potentiometer is characterized by comprising a first shell, a second shell, an electric brush mounting plate, an electric brush, a substrate, a carbon film resistor, a first terminal, a second terminal, a third terminal and a rotating shaft, wherein the second shell is embedded in the lower end part of the first shell, the upper end part of the second shell is concavely provided with a containing groove, the electric brush mounting plate is rotatably arranged at the bottom of the containing groove, the electric brush is detachably arranged on the upper end wall of the electric brush mounting plate and rotates along with the electric brush mounting plate, two sides of one end of the electric brush are respectively provided with a first contact spring sheet and a second contact spring sheet in an upward protruding mode, the substrate is covered on the upper end part of the containing groove, the upper end part and the lower end part of the electric brush mounting plate are respectively provided with a first supporting part and a second supporting part in a protruding mode, the first supporting part and the second supporting part are respectively arranged in a sliding abutting mode with the lower end wall of the substrate and the inner bottom wall of the accommodating groove, the carbon film sheet resistor is arranged on the lower end wall of the substrate, a conducting ring is arranged on the substrate positioned on the inner side of the carbon film sheet resistor along the circumferential direction, the first contact elastic sheet and the second contact elastic sheet are respectively connected with the carbon film sheet resistor and the conducting ring in a sliding abutting mode, the rear end parts of the first terminal, the second terminal and the third terminal are respectively fixed on the front end part of the substrate through rivets, the first terminal and the third terminal are respectively electrically connected with the two ends of the carbon film sheet resistor, the second terminal is electrically connected with the conducting ring, the front end parts of the first terminal, the second terminal and the third terminal are respectively extended out of the outer peripheral wall of the first housing, the upper end wall of the first shell is concavely provided with a sliding hole, the rotating shaft is rotatably embedded in the sliding hole, the upper end wall of the base plate is concavely provided with a through hole, the lower end part of the rotating shaft rotatably penetrates through the through hole, and the lower end part of the rotating shaft is detachably and fixedly connected with the brush mounting plate.

2. The rotary potentiometer according to claim 1, further comprising rivets, wherein a rivet positioning hole is concavely formed in each of two sides of the first housing and the second housing, the rivets are respectively arranged in the rivet positioning holes in a penetrating manner, and the first housing and the second housing are fixedly connected through the rivets.

3. The rotary potentiometer according to claim 2, wherein the two sides of the base plate are respectively provided with a first limit groove in a concave manner, and the rivets are respectively embedded in the first limit grooves.

4. The rotary potentiometer according to claim 1, wherein the upper ends of the first contact spring and the second contact spring are respectively provided with a first arc-shaped abutting part and a second arc-shaped abutting part in a protruding mode, and the first arc-shaped abutting part and the second arc-shaped abutting part are respectively in sliding abutting connection with the carbon film resistor body and the conductive ring.

5. The rotary potentiometer according to claim 1, wherein the first contact spring plate is concavely provided with a plurality of open grooves extending in the length direction along the width direction.

6. The rotary potentiometer according to claim 1, wherein the upper end wall of the second housing is concavely provided with a plurality of second limiting grooves, and the first terminal, the second terminal and the third terminal are respectively arranged in the second limiting grooves.

7. The rotary potentiometer according to claim 1, wherein a positioning post is respectively protruded on two sides of the upper end wall of the brush mounting plate, a positioning hole is respectively concavely formed on two sides of the brush, and the positioning posts are respectively embedded in the positioning holes.

8. The rotary potentiometer according to claim 1, wherein the lower end of the rotary shaft is provided with a plug-in portion, the upper end of the first supporting portion is concavely provided with a plug-in groove, the plug-in portion and the plug-in groove are both in oval-shaped configuration, and the plug-in portion is detachably embedded in the plug-in groove.

9. The rotary potentiometer according to claim 1, wherein the two sides of the outer peripheral wall of the first housing are respectively provided with a mounting plate in a protruding manner, and the mounting plates are respectively provided with a screw mounting hole in a recessed manner.

10. The rotary potentiometer according to claim 1, wherein a first limiting protrusion is protruding from the outer peripheral wall of the bottom of the accommodating groove, a second limiting protrusion is protruding from the outer side of the lower end wall of the brush mounting plate, and the second limiting protrusion is capable of being abutted to the first limiting protrusion.