Magnetoelectric potentiometer

Abstract

The utility model belongs to the technical field of potentiometers, and discloses a magnetoelectric potentiometer which comprises a shell, a bracket assembly, a rotating shaft, a magnetic piece and a PCB (Printed Circuit Board) assembly, the support assembly is connected with the shell. The shell and the support assembly can limit movement of the rotating shaft in the axis direction of the rotating shaft. The magnetic part is arranged on the rotating shaft and can rotate along with the rotating shaft; the PCB assembly comprises a PCB, a chip board and a terminal, the PCB is arranged on the shell, the terminal is connected with the PCB, the chip board is arranged on the PCB and corresponds to the magnetic part, the magnetic part is driven to rotate by rotating the rotating shaft, the chip board can detect a changing magnetic field and convert a magnetic field signal into a voltage signal, the voltage signal is transmitted to the terminal from the chip board through the PCB, and the terminal is connected with the PCB. The terminal outputs a voltage signal corresponding to the magnetic field signal. The magnetoelectric potentiometer is long in service life, is not affected by temperature and humidity, can adapt to different use environments, and ensures the accuracy of an output result at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of potentiometers, in particular to a magnetoelectric potentiometer. Background Art

[0002] Potentiometer is an electromechanical component, usually composed of a resistor and a movable brush. The potentiometer used in traditional volume control belongs to analog contact potentiometer. Analog contact potentiometer has a carbon film inside, and the brush moves on the carbon film to obtain different resistance values, thereby achieving control of voltage or current.

[0003] However, during the adjustment process of the carbon film contact potentiometer, the brush will continuously contact the carbon film when sliding on the carbon film, which will damage the carbon film and shorten the service life of the product. In addition, the carbon film is greatly affected by the ambient temperature and humidity, which will affect the resistance value and thus affect the accuracy of the potentiometer output result. Therefore, it is necessary to design a potentiometer to overcome the problems of short service life and great influence of ambient temperature and humidity of traditional potentiometers. Utility Model Content

[0004] The utility model aims to provide a magnetoelectric potentiometer to solve the problems of short service life of the potentiometer and inaccurate output result of the potentiometer caused by the influence of environmental humidity.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A magnetoelectric potentiometer, comprising:

[0007] shell;

[0008] a bracket assembly, the bracket assembly being connected to the housing;

[0009] A rotating shaft, the rotating shaft is rotatably arranged on the bracket assembly, and the housing and the bracket assembly can limit the movement of the rotating shaft in the axial direction of the rotating shaft;

[0010] A magnetic member, the magnetic member is arranged on the rotating shaft and can rotate along with the rotating shaft;

[0011] The PCB assembly comprises a PCB board, a chip board and a terminal, wherein the PCB board is arranged on the housing; the terminal is connected to the PCB board; the chip board is arranged on the PCB board, and the chip board is arranged corresponding to the magnetic part; by rotating the rotating shaft to drive the magnetic part to rotate, the chip board can detect the changing magnetic field and convert the magnetic field signal into a voltage signal, and the voltage signal is transmitted from the chip board to the terminal through the PCB board, and the terminal outputs a voltage signal corresponding to the magnetic field signal.

[0012] Preferably, the rotating shaft includes a shaft head and a shaft body, the diameter of the shaft head is larger than the diameter of the shaft body, and the shaft head and the shaft body are connected; an abutment portion is provided on the inner wall of the outer shell, and in the axial direction of the rotating shaft, one end of the shaft head abuts against the abutment portion, and the other end abuts against the bracket assembly.

[0013] Preferably, the bracket assembly includes a bracket body and a sleeve, the bracket body and the sleeve are connected, the bracket body is fixedly connected to the outer shell, the sleeve is used for the rotating shaft to pass through, and the other end of the shaft head abuts against the surface of the sleeve.

[0014] Preferably, the bracket body and the sleeve are riveted.

[0015] Preferably, the bracket assembly also includes a sliding member, which is fixed to the bracket assembly. The side wall of the rotating shaft is provided with a step, and the step includes a first step surface perpendicular to the axis of the rotating shaft and a second step surface parallel to the axis of the rotating shaft. The sliding member abuts against the first step surface.

[0016] Preferably, the sliding member comprises at least one elastic protrusion, and at least one of the elastic protrusions abuts against the first step surface.

[0017] Preferably, the inner wall of the shell has a placement groove, and the PCB board is accommodated in the placement groove.

[0018] Preferably, the rotating shaft is provided with a groove, and the magnetic member is fixed in the groove.

[0019] Preferably, the bracket assembly has a pressing end, and by pressing the pressing end, the housing has a pressing part, and the pressing end is pressed and connected with the pressing part.

[0020] Preferably, the rotating shaft has a gripping end, and the gripping end is used for a person to grip to rotate the rotating shaft.

[0021] Beneficial effects of the utility model:

[0022] The magnetoelectric potentiometer provided by the utility model comprises a shell, a bracket assembly, a rotating shaft, a magnetic part and a PCB assembly. The bracket assembly is connected to the shell; the rotating shaft is rotatably arranged on the bracket assembly, and the shell and the bracket assembly can limit the movement of the rotating shaft in the axial direction of the rotating shaft; the magnetic part is arranged on the rotating shaft and can rotate with the rotating shaft; the PCB assembly comprises a PCB board, a chip board and a terminal, the PCB board is arranged on the shell, the terminal is connected to the PCB board, the chip board is arranged on the PCB board, the chip board and the magnetic part are arranged correspondingly, the rotating shaft is rotated to drive the magnetic part to rotate, the chip board can detect the changing magnetic field, and convert the magnetic field signal into a voltage signal, the voltage signal is transmitted from the chip board to the terminal through the PCB board, and the terminal outputs a voltage signal corresponding to the magnetic field signal. The arrangement of the magnetic part and the chip board enables the magnetoelectric potentiometer to apply the magnetic induction principle when working, the magnetic field changes by rotating the magnetic part, and is converted into a voltage signal by the chip board, the process does not have the problem of component contact damage, and the service life is long. In addition, since the magnetoelectric potentiometer is not provided with a carbon film, it will not be affected by temperature and humidity, can adapt to different use environments, and at the same time ensure the accuracy of the output result. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the magnetoelectric potentiometer provided in an embodiment of the utility model;

[0024] Figure 2 It is an exploded view of the magnetoelectric potentiometer provided in the embodiment of the utility model;

[0025] Figure 3 is a cross-sectional view of a magnetoelectric potentiometer provided by an embodiment of the utility model;

[0026] Figure 4 yes Figure 3 A partial enlarged view of part A;

[0027] Figure 5 It is a structural schematic diagram of the bracket assembly provided in an embodiment of the utility model.

[0028] In the figure:

[0029] 1. housing; 11. abutment portion; 12. placement groove;

[0030] 2. Bracket assembly; 21. Bracket body; 211. Pressing end; 22. Bushing; 23. Sliding member; 231. Elastic protrusion; 24. Rivet;

[0031] 3. rotating shaft; 31. shaft head; 32. shaft body; 321. gripping end; 33. first step surface; 34. second step surface; 35. groove;

[0032] 4. Magnetic parts;

[0033] 5. PCB assembly; 51. PCB board; 52. Chip board; 53. Terminal. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] like Figures 1 to 5 As shown, the embodiment of the utility model provides a magnetoelectric potentiometer, which can be applied to multimedia and other fields to adjust the volume.

[0039] In some embodiments, the magnetoelectric potentiometer includes a housing 1, a bracket assembly 2, a rotating shaft 3, a magnetic member 4, and a PCB assembly 5. The bracket assembly 2 is connected to the housing 1; the rotating shaft 3 is rotatably arranged on the bracket assembly 2, and the housing 1 and the bracket assembly 2 can limit the movement of the rotating shaft 3 in the axial direction of the rotating shaft 3; the magnetic member 4 is arranged on the rotating shaft 3 and can rotate with the rotating shaft 3; the PCB assembly 5 includes a PCB board 51, a chip board 52, and a terminal 53, the PCB board 51 is arranged on the housing 1, the terminal 53 is connected to the PCB board 51, the chip board 52 is arranged on the PCB board 51, and the chip board 52 is arranged corresponding to the magnetic member 4. By rotating the rotating shaft 3 to drive the magnetic member 4 to rotate, the chip board 52 can detect the changing magnetic field and convert the magnetic field signal into a voltage signal, and the voltage signal is transmitted from the chip board 52 to the terminal 53 through the PCB board 51, and the terminal 53 outputs a voltage signal corresponding to the magnetic field signal.

[0040] The arrangement of the magnetic part 4 and the chip board 52 enables the magnetoelectric potentiometer to apply the magnetic induction principle when working, and the magnetic field changes by rotating the magnetic part 4, and is converted into a voltage signal by the chip board 52. This process does not cause the problem of component contact damage, and the service life is long. In addition, since the magnetoelectric potentiometer is not provided with a carbon film, it will not be affected by temperature and humidity, and can adapt to different use environments, while ensuring the accuracy of the output results.

[0041] The inner wall of the housing 1 has a placement groove 12, and the PCB board 51 is accommodated in the placement groove 12. Specifically, in this embodiment, the terminal 53 is riveted and fixed to the PCB board 51, and the housing 1 is injection molded so that the housing 1 is molded around the PCB board 51 and the outer side of the riveted part of the PCB board 51 and the terminal 53. In order to facilitate the installation of the chip board 52, the housing 1 has an open part, and the PCB board 51 is exposed in the open part, so that the chip board 52 can be installed on the PCB board 51.

[0042] The rotating shaft 3 includes a shaft head 31 and a shaft body 32. The diameter of the shaft head 31 is larger than the diameter of the shaft body 32, and the shaft head 31 and the shaft body 32 are connected. An abutment portion 11 is provided on the inner wall of the housing 1. In the axial direction of the rotating shaft 3, one end of the shaft head 31 abuts against the abutment portion 11, and the other end abuts against the bracket assembly 2. The diameter of the shaft head 31 is larger than the shaft body 32, so that the two ends of the shaft head 31 can abut against the housing 1 and the bracket assembly 2 respectively, so that the rotating shaft 3 can be fixed along its axial direction to prevent the rotating shaft 3 from shifting up and down during rotation.

[0043] like Figure 3 and Figure 5As shown, in order to facilitate the arrangement of the magnetic component 4, a groove 35 is provided on the rotating shaft 3, and the magnetic component 4 is fixed in the groove 35. Specifically, the groove 35 includes a first groove and a second groove, the first groove is arranged on the shaft body 32, the second groove is arranged on the shaft head 31, the inner diameter of the second groove is larger than the inner diameter of the first groove, the first groove is connected to the second groove, the magnetic component 4 is fixed in the second groove by an adhesive, and the magnetic component 4 partially extends to the second groove. The arrangement of the first groove and the second groove enables the magnetic component 4 to be more stably arranged in the rotating shaft 3, and the inner diameter of the second groove is larger than the first groove, so that the chip board 52 can smoothly sense the change of the magnetic field of the magnetic component 4, thereby outputting a linearly changing signal curve, that is, a change in voltage, and the signal change can be one group or multiple groups. Optionally, the magnetic component 4 can be a radially magnetized 2-pole magnet.

[0044] Specifically, the bracket assembly 2 includes a bracket body 21 and a shaft sleeve 22, the bracket body 21 and the shaft sleeve 22 are connected, the bracket body 21 is fixedly connected to the housing 1, the shaft sleeve 22 is used for the shaft 3 to pass through, and the other end of the shaft head 31 abuts against the surface of the shaft sleeve 22. Specifically, in this embodiment, since the bracket body 21 and the shaft sleeve 22 do not need to be disassembled after installation, the bracket body 21 and the shaft sleeve 22 are riveted by rivets 24. The riveted fixing method has the characteristics of strong bearing capacity and low cost. In some embodiments, the bracket body 21 and the shaft sleeve 22 can be replaced by an integrally formed pipe-drawing bracket, but it is not limited thereto.

[0045] Further, in order to facilitate the connection between the bracket body 21 and the housing 1, the bracket assembly 2 has a pressing end 211, and the housing 1 has a pressing portion, and the pressing end 211 is pressed and connected with the pressing portion. The pressing portion is located on the upper surface of the housing 1, and is arranged corresponding to the pressing end 211. By pressing the pressing end 211, the bracket assembly 2 is connected to the housing 1. Specifically, in this embodiment, the pressing end 211 is located on the bracket body 21. In other embodiments, the connection method between the housing 1 and the bracket assembly 2 can also be screwed or riveted, but it is not limited thereto.

[0046] like Figure 3 and Figure 4As shown, since the rotating shaft 3 needs to contact with the bracket assembly 2 when rotating, in order to protect the bracket assembly 2 from being worn, the bracket assembly 2 also includes a sliding member 23, the sliding member 23 is fixedly arranged on the bracket assembly 2, and the side wall of the rotating shaft 3 is provided with a step, the step includes a first step surface 33 perpendicular to the axis of the rotating shaft 3 and a second step surface 34 parallel to the axis of the rotating shaft 3, and the sliding member 23 abuts against the first step surface 33. Specifically, the step is arranged on the shaft head 31 of the rotating shaft 3, the sliding member 23 is arranged on the shaft sleeve 22, the sliding member 23 has an avoidance hole, the rotating shaft 3 is sequentially penetrated through the avoidance hole and the shaft sleeve 22, and abuts against the elastic protrusion 231 of the sliding member 23. The arrangement of the sliding member 23 increases the service life of the shaft sleeve 22, and when the rotating shaft 3 and the sliding member 23 are frequently rubbed and worn, it is only necessary to replace the sliding member 23.

[0047] Furthermore, in order to increase the torque when the rotating shaft 3 rotates, the sliding member 23 includes at least one elastic protrusion 231, and at least one elastic protrusion 231 abuts against the first step surface 33. In this embodiment, two elastic protrusions 231 are provided along the circumference of the avoidance hole, and the connecting line of the two elastic protrusions 231 passes through the center of the avoidance hole. The provision of the two elastic protrusions 231 can increase the torque of the rotating shaft 3 when the rotating shaft 3 rotates, and also make the rotation of the rotating shaft 3 more stable.

[0048] Preferably, in order to facilitate manual rotation of the shaft 3, the shaft 3 has a gripping end 321, and the gripping end 321 is used for the person to grip to rotate the shaft 3. Specifically, the gripping end 321 is a plane, and the gripping end 321 is made of a non-slip material. In other embodiments, non-slip corrugations can be designed on the gripping end 321 to facilitate the person to rotate the shaft 3.

[0049] When installing the magnetoelectric potentiometer, the PCB board 51 and the terminal 53 are riveted together, and the housing 1 is overmolded, and the chip board 52 is installed on the PCB board 51 to form a semi-finished housing. The sleeve 22 and the bracket body 21 are riveted together to form a semi-finished sleeve. The sliding member 23 is fixed to the surface of the sleeve 22, and the rotating shaft 3 with the magnetic member 4 fixed thereto is inserted into the sleeve 22. Finally, the semi-finished housing and the semi-finished sleeve are riveted and fixed to form a magnetoelectric potentiometer product.

[0050] When the magnetoelectric potentiometer is in use, the rotating shaft 3 is rotated to drive the magnetic part 4 to rotate, and the chip board 52 can detect the changing magnetic field and convert the magnetic field signal into a voltage signal. The voltage signal is transmitted from the chip board 52 to the terminal 53 through the PCB board 51, and the terminal 53 outputs a voltage signal corresponding to the magnetic field signal.

[0051] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A magnetoelectric potentiometer, characterized in that: include: Housing (1); A bracket assembly (2), the bracket assembly (2) being connected to the housing (1); A rotating shaft (3), the rotating shaft (3) being rotatably mounted on the bracket assembly (2), the housing (1) and the bracket assembly (2) being capable of limiting the movement of the rotating shaft (3) in the axial direction of the rotating shaft (3); A magnetic member (4), wherein the magnetic member (4) is disposed on the rotating shaft (3) and is capable of rotating along with the rotating shaft (3); A PCB assembly (5) comprises a PCB board (51), a chip board (52) and a terminal (53), wherein the PCB board (51) is arranged on the housing (1); the terminal (53) is connected to the PCB board (51); the chip board (52) is arranged on the PCB board (51), and the chip board (52) and the magnetic component (4) are arranged correspondingly; by rotating the rotating shaft (3) to drive the magnetic component (4) to rotate, the chip board (52) can detect a changing magnetic field and convert the magnetic field signal into a voltage signal, and the voltage signal is transmitted from the chip board (52) to the terminal (53) through the PCB board (51), and the terminal (53) outputs a voltage signal corresponding to the magnetic field signal.

2. The magnetoelectric potentiometer according to claim 1, characterized in that: The rotating shaft (3) comprises a shaft head (31) and a shaft body (32); the diameter of the shaft head (31) is larger than the diameter of the shaft body (32); the shaft head (31) and the shaft body (32) are connected; an abutment portion (11) is provided on the inner wall of the housing (1); in the axial direction of the rotating shaft (3), one end of the shaft head (31) abuts against the abutment portion (11), and the other end abuts against the bracket assembly (2).

3. The magnetoelectric potentiometer according to claim 2, characterized in that: The support assembly (2) comprises a support body (21) and a shaft sleeve (22), wherein the support body (21) and the shaft sleeve (22) are connected to each other, the support body (21) is fixedly connected to the housing (1), the shaft sleeve (22) is used for the rotating shaft (3) to pass through, and the other end of the shaft head (31) abuts against the surface of the shaft sleeve (22).

4. The magnetoelectric potentiometer according to claim 3, characterized in that: The bracket body (21) and the shaft sleeve (22) are riveted.

5. The magnetoelectric potentiometer according to claim 1, characterized in that: The support assembly (2) further comprises a sliding member (23), wherein the sliding member (23) is fixed to the support assembly (2), and a side wall of the rotating shaft (3) is provided with a step, wherein the step comprises a first step surface (33) perpendicular to the axis of the rotating shaft (3) and a second step surface (34) parallel to the axis of the rotating shaft (3), and the sliding member (23) abuts against the first step surface (33).

6. The magnetoelectric potentiometer according to claim 5, characterized in that: The sliding member (23) comprises at least one elastic protrusion (231), and at least one of the elastic protrusions (231) abuts against the first step surface (33).

7. The magnetoelectric potentiometer according to any one of claims 1 to 6, characterized in that: The inner wall of the housing (1) is provided with a placement groove (12), and the PCB board (51) is accommodated in the placement groove (12).

8. The magnetoelectric potentiometer according to any one of claims 1 to 6, characterized in that: The rotating shaft (3) is provided with a groove (35), and the magnetic member (4) is fixed in the groove (35).

9. The magnetoelectric potentiometer according to any one of claims 1 to 6, characterized in that: The support assembly (2) has a pressing end (211), the housing (1) has a pressing portion, and the pressing end (211) is pressed and connected to the pressing portion.

10. The magnetoelectric potentiometer according to any one of claims 1 to 6, characterized in that: The rotating shaft (3) has a gripping end (321), and the gripping end (321) is used for a person to grip to rotate the rotating shaft (3).

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