CN221281840U - Hall rocker potentiometer - Google Patents
Hall rocker potentiometer Download PDFInfo
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- CN221281840U CN221281840U CN202323082466.4U CN202323082466U CN221281840U CN 221281840 U CN221281840 U CN 221281840U CN 202323082466 U CN202323082466 U CN 202323082466U CN 221281840 U CN221281840 U CN 221281840U
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- 238000010586 diagram Methods 0.000 description 2
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- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
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- 239000002184 metal Substances 0.000 description 1
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Abstract
The utility model aims to provide a Hall rocker potentiometer which comprises a shell, a reversing assembly and a signal assembly, wherein the reversing assembly comprises a first rotating shaft, a second rotating shaft, a rocker and a reset piece, the first rotating shaft and the second rotating shaft are both arranged in the shell in a rotating mode, the first rotating shaft and the second rotating shaft are mutually perpendicular, one end of the rocker is connected with the first rotating shaft in a rotating mode, the other end of the rocker penetrates through the second rotating shaft and stretches out of the top of the shell, the reset piece is arranged below the rocker, the reset piece is respectively abutted to the rocker and the shell, the signal assembly comprises a circuit board, an IC chip, two magnets and two Hall sensors, the circuit board is arranged on the outer side wall of the shell, the IC chip is arranged on the circuit board, the two Hall sensors are both electrically connected with the IC chip, one of the two magnets is arranged on one end of the first rotating shaft, the other magnet is arranged on one end of the second rotating shaft, and the two magnets are respectively aligned with the two Hall sensors.
Description
Technical Field
The utility model relates to the technical field of rockers, in particular to a Hall rocker potentiometer.
Background
The joystick is generally used for a joystick control device having four angles of movement in the front-rear, left-right directions of a horizontal plane. The rocker is developed from the past carbon brush structure to the present Hall structure, and from the past contact control to the present non-contact control, the control precision and the service life are greatly improved.
For example, chinese patent application number CN202222330151.6 discloses a hall rocker switch, which comprises a housing, a rocking assembly disposed on the housing and having an upper end penetrating out of the upper portion of the housing, a reset member for driving the rocking assembly to reset, and a PCB board, and is characterized by further comprising a magnet linked with the rocking assembly, and a hall chip electrically connected to the PCB board and located below the magnet, wherein the rocking assembly comprises a bracket movably disposed on the housing, a movable disc disposed in the housing, and a rocker disposed on the movable disc and movably connected with the bracket, wherein the magnet is disposed at the lower end of the rocking assembly, and the reset member is disposed between the rocker and the movable disc. Thus, by shaking the rocker, the distance between the magnet and the Hall chip changes after the magnet swings, and the magnet generates a variable output signal of voltage after the intensity of magnetic flux changes and the Hall chip senses.
However, when the conventional hall rocker switch is actually used, the reset member is specifically a spring, and as the magnet is located in the middle of the reset member and swings along with the rocker, the magnet can perform certain displacement in the reset member (spring), so that the spring induces a magnetic field, and the induced magnetic field also acts on the hall chip, so that the hall chip generates an interference signal, that is, the conventional hall rocker switch is poor in reliability. In order to solve the technical problems, the Hall rocker potentiometer is provided.
Disclosure of utility model
The utility model aims to overcome the defects in the prior art and provides the Hall rocker potentiometer with high precision and high reliability.
The aim of the utility model is realized by the following technical scheme:
a hall rocker potentiometer comprising:
A housing;
The reversing assembly comprises a first rotating shaft, a second rotating shaft, a rocker and a reset piece, wherein the first rotating shaft and the second rotating shaft are both rotationally arranged in the shell, the axial horizontal projection of the first rotating shaft is mutually perpendicular to the axial horizontal projection of the second rotating shaft, one end of the rocker is rotationally connected with the first rotating shaft, the other end of the rocker penetrates through the second rotating shaft and extends out of the top of the shell, the reset piece is positioned below the rocker, and the reset piece is respectively abutted with the rocker and the shell;
The signal assembly comprises a circuit board, an IC chip, two magnets and two Hall sensors, wherein the circuit board is arranged on the outer side wall of the shell, the IC chip is arranged on the circuit board, the two Hall sensors are electrically connected with the IC chip, one of the two magnets is arranged on one end of the first rotating shaft, the other of the two magnets is arranged on one end of the second rotating shaft, and the two magnets are respectively aligned with the two Hall sensors.
Optionally, the shell includes the bottom plate, detains shell and two side shells, detain the shell and detain and locate on the bottom plate, so that first pivot with the second pivot all rotate set up in detain the shell with between the bottom plate, two the side shells respectively the joint in detain on two lateral walls of shell, and two the side shell all with circuit board joint, two hall sensor is located two respectively the side shell.
Optionally, the signal assembly further includes a key, the key is disposed on the bottom plate, the key is abutted to the buckle shell, and one end of the first rotating shaft away from the magnet is abutted to the input end of the key.
Optionally, the restoring piece includes spring and kicking block, the kicking block along vertical direction slip set up in on the bottom plate, the spring set up in the kicking block with between the bottom plate, the spring is used for the ejector pin the kicking block, so that the kicking block roof connect in the bottom of rocker.
Optionally, a top flat surface is arranged on one side of the top block, which is close to the rocker, and a top flat surface is arranged on one side of the rocker, which is close to the top block, and the top flat surface is abutted to the top flat surface.
Optionally, the signal assembly further includes a signal pin, the signal pin is electrically connected with the IC chip, and the signal pin extends from a lower bottom surface of the circuit board.
Optionally, the shell further comprises a lower buckle cover, the lower buckle cover is buckled on the lower bottom surface of the circuit board, and the lower buckle cover is used for clamping the signal pins.
Optionally, the signal pins are provided in plurality, each signal pin is divided into two groups, and the two groups of signal pins are respectively located below the two hall sensors.
Optionally, the middle part of the second rotating shaft is provided with an arch structure, a through waist-shaped hole is formed in the arch structure, and the rocker penetrates through the waist-shaped hole.
Optionally, the reversing assembly further includes a cap disposed on top of the rocker.
Compared with the prior art, the utility model has at least the following advantages:
1. Install two magnets respectively on the tip position of first pivot and second pivot independently to make the rotation volume of first pivot and second pivot utilize two hall sensors to survey respectively, two magnets are the structure of keeping away from the piece that resets moreover, thereby can effectively avoid the piece that resets to produce the interference to magnet, consequently can effectively improve precision and reliability.
2. The magnet and the Hall sensor are of a non-contact structure, and compared with a rocker switch which is detected by using a carbon brush, the service life of the rocker switch can be effectively prolonged.
3. The IC chip is welded on the circuit board, so that magnetic field change signals detected by the two Hall sensors can be directly converted and calculated on the IC chip into electric signals with corresponding movement amounts, and the Hall rocker potentiometer can be directly replaced in various handles, and has good compatibility.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a Hall rocker potentiometer according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of an exploded construction of the Hall rocker potentiometer shown in FIG. 1;
FIG. 3 is a schematic view of a portion of the Hall rocker potentiometer shown in FIG. 1;
FIG. 4 is a schematic view of a partial cross-sectional structure of the Hall rocker potentiometer shown in FIG. 1;
Fig. 5 is a schematic view of a part of the hall rocker potentiometer shown in fig. 1 at another angle.
Reference numerals illustrate:
10. Hall rocker potentiometer; 100. a housing; 200. a reversing assembly; 300. a signal assembly; 210. a first rotating shaft; 220. a second rotating shaft; 230. a rocker; 240. a reset member; 310. a circuit board; 320. an IC chip; 330. a magnet; 340. a hall sensor; 110. a bottom plate; 120. buckling a shell; 130. a side case; 350. a key; 241. a top block; 360. a signal pin; 140. a lower buckle cover; 221. a waist-shaped hole; 250. and (3) capping.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model.
In the description of the embodiments of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the embodiments of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more, unless explicitly defined otherwise.
In the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.
As shown in fig. 1 to 4, a hall rocker potentiometer 10 includes a housing 100, a reversing assembly 200 and a signal assembly 300, the reversing assembly 200 includes a first rotating shaft 210, a second rotating shaft 220, a rocker 230 and a reset member 240, the first rotating shaft 210 and the second rotating shaft 220 are both rotatably disposed in the housing 100, the horizontal projection of the axial direction of the first rotating shaft 210 is perpendicular to the horizontal projection of the axial direction of the second rotating shaft 220, one end of the rocker 230 is rotatably connected to the first rotating shaft 210, the other end of the rocker 230 is disposed on the second rotating shaft 220 and extends out from the top of the housing 100, the reset member 240 is disposed below the rocker 230, the reset member 240 is respectively abutted to the rocker 230 and the housing 100, the signal assembly 300 includes a circuit board 310, an IC chip 320, two magnets 330 and two hall sensors 340, the circuit board 310 is disposed on the outer side wall of the housing 100, the two hall sensors 340 are both disposed on the circuit board 310, one end of the two magnets 330 is disposed on the first rotating shaft 210, the other end of the two hall sensors 340 is disposed on the two opposite ends of the two hall sensors 330, and the two hall sensors 330 are respectively aligned with the two magnet 330.
It should be noted that, the first shaft 210 and the second shaft 220 are rotatably installed in the housing 100, wherein the projection of the axial extension direction of the first shaft 210 and the projection of the axial extension direction of the second shaft 220 on the horizontal plane are perpendicular to each other, that is, the first shaft 210 and the second shaft 220 are mutually crossed. Thus, when the hall rocker potentiometer 10 is placed horizontally, one of the first and second shafts 210 and 220 can be ensured to reciprocate along the X-axis direction, and the other can reciprocate along the Y-axis direction. Further, one end of the rocker 230 is connected to the first rotating shaft 210, and the other end of the rocker 230 passes through the second rotating shaft 220 and protrudes from the top surface of the housing 100. The reset member 240 is installed in the housing 100, specifically, the reset member 240 is located below the rocker 230, and the reset member 240 abuts against the bottom of the housing 100, so that the rocker 230 is maintained in a vertically upward state by the pushing force of the reset member 240. Further, the circuit board 310 is adjacently mounted on the outer side wall of the housing 100, the IC chip 320 is soldered and fixed on the circuit board 310, for example, the IC chip 320 is a single chip microcomputer, the two hall sensors 340 are also soldered and fixed on the circuit board 310, and the two hall sensors 340 are electrically connected with the IC chip 320. Two magnets 330 are respectively mounted on one end of the first shaft 210 and one end of the second shaft 220, and the two magnets 330 are aligned with the two hall sensors 340, respectively. In this way, compared with the prior art, in the present application, the two magnets 330 are independently installed at the end positions of the first rotating shaft 210 and the second rotating shaft 220, so that the rotation amounts of the first rotating shaft 210 and the second rotating shaft 220 are respectively measured by the two hall sensors 340, and the two magnets 330 are both far away from the reset element 240, so that the reset element 240 can be effectively prevented from interfering with the magnets 330, and therefore the precision and reliability can be effectively improved. It should be noted that, when the rocker 230 swings, the hall sensor 340 also known as a magnetic field sensor drives the first shaft 210/the second shaft 220 to rotate, so that the magnet 330 rotates relative to the hall sensor 340, and the hall sensor 340 converts the magnetic field change into an electrical signal change due to the magnetic field change, so that the changed electrical signal is transmitted to the IC chip 320 to be converted into a corresponding movement amount of the first shaft 210 or the second shaft 220, and the IC chip 320 sends the control electrical signal to a handle motherboard connected to the hall rocker potentiometer 10. Because the magnet 330 and the hall sensor 340 are in a non-contact structure, the service life can be effectively prolonged compared with the use of carbon brushes to detect the rocker switch. Further, since the IC chip 320 is integrated on the circuit board 310, the magnetic field variation signals detected by the two hall sensors 340 can be directly converted and calculated on the IC chip 320 into electric signals corresponding to the movement amount, so that the hall rocker potentiometer 10 of the present application can be directly replaced in various handles, and thus has good compatibility.
As shown in fig. 1, 3 and 4, in an embodiment, the housing 100 includes a bottom plate 110, a buckling housing 120 and two side housings 130, the buckling housing 120 is buckled on the bottom plate 110, so that the first rotating shaft 210 and the second rotating shaft 220 are both rotatably disposed between the buckling housing 120 and the bottom plate 110, the two side housings 130 are respectively clamped on two outer sidewalls of the buckling housing 120, and the two side housings 130 are respectively clamped with the circuit board 310, and the two hall sensors 340 are respectively located in the two side housings 130.
It should be noted that, the buckle housing 120 is fastened to the base plate 110, and in one embodiment, the buckle housing 120 has a square structure with four sidewalls, wherein two of the sidewalls are disposed opposite to each other. First half grooves are formed in four side walls of the buckle housing 120, second half grooves are formed in four side walls of the bottom plate 110, when the buckle housing 120 is buckled on the bottom plate 110, two coaxial through holes are formed by surrounding any two adjacent first half grooves and two corresponding second half grooves, and then two ends of the first rotating shaft 210/the second rotating shaft 220 respectively penetrate through the two coaxial through holes, so that the first rotating shaft 210/the second rotating shaft 220 are clamped by the buckle housing 120 and the bottom plate 110 together and rotate in the buckle housing 120. The two side shells 130 are respectively clamped on two adjacent outer sidewalls of the buckle shell 120, wherein the two side shells 130 are further clamped with the circuit board 310. And, in the next year, the respective hall sensors 340 are respectively located in the two side cases 130, and the end of the first rotary shaft 210 where the magnet 330 is mounted and the end of the second rotary shaft 220 where the magnet 330 is mounted are respectively located in the two side cases 130. It should be noted that, the circuit board 310 can be fixed on the outer sidewall of the housing 100 through the side shell 130, and the hall sensor 340 and the magnet 330 can be isolated and protected by the side shell 130, so that the foreign matters are prevented from falling into the space between the hall sensor 340 and the magnet 330 to generate interference signals, and the reliability of the hall rocker potentiometer 10 is effectively ensured.
As shown in fig. 1 to 5, in an embodiment, the signal assembly 300 further includes a key 350, the key 350 is disposed on the base plate 110, the key 350 is abutted against the buckle housing 120, and an end of the first rotating shaft 210 away from the magnet 330 is abutted against an input end of the key 350.
The first shaft 210 is abutted against the key 350 at an end far from the magnet 330, so that the rocker 230 is further provided with a function of pressing to output a pressing signal. Wherein the key 350 is independent of the circuit board 310, and the key 350 is used for independently inputting signals to the handle.
As shown in fig. 2 and 4, in an embodiment, the reset element 240 includes a top block 241 and a spring, the top block 241 is slidably disposed on the bottom plate 110 along a vertical direction, the spring is disposed between the top block 241 and the bottom plate 110, and the spring is used for pushing the top block 241, so that the top block 241 is propped against the bottom end of the rocker 230.
It should be noted that, the reset element 240 is configured to push the rocker 230, so as to ensure that the rocker 230 stably maintains an upward structure along the vertical direction without an external force. Specifically, the top block 241 is slidably mounted on the base plate 110 in the vertical direction, that is, the top block 241 can only perform a lifting motion with respect to the base plate 110. The spring is installed between the top block 241 and the bottom plate 110, and under the elastic thrust of the spring, the top block 241 always pushes the rocker 230 upwards in a natural state, so that the rocker 230 always keeps a vertical upwards state under the action of no external force.
As shown in fig. 2 and 4, in an embodiment, a pressing plane is disposed on a side of the top block 241 near the rocker 230, and a pressing plane is disposed on a side of the rocker 230 near the top block 241, where the pressing plane abuts against the pressing plane.
It should be noted that, one side of the top block 241 contacting the rocker 230 is a planar structure, wherein the axis of the rocker 230 and the supporting plane are perpendicular to each other. In this way, the pressing plane of the pressing block 241 is reliably abutted against the pressing plane of the rocker 230 under the elastic thrust of the spring, so that the rocker 230 is stably maintained in a state oriented along the vertical direction when no external force acts.
Further, in an embodiment, rounded corners are disposed around the top plane. Thus, when the rocker 230 swings under an external force, the round corner portion is abutted against the top flat surface, and smoothness of the rocker 230 during swinging can be effectively ensured.
As shown in fig. 1 to 5, in an embodiment, the signal assembly 300 further includes a signal pin 360, the signal pin 360 is electrically connected to the IC chip 320, and the signal pin 360 extends from the lower bottom surface of the circuit board 310.
It should be noted that, the signal pin 360 is used for outputting the electrical signal after the IC chip 320 is converted and calculated, so when the hall rocker potentiometer 10 is mounted on the handle, the signal pin 360 is used for electrically connecting with the motherboard of the handle.
As shown in fig. 1 to 5, in an embodiment, the housing 100 further includes a lower buckle cover 140, the lower buckle cover 140 is buckled on the lower bottom surface of the circuit board 310, and the lower buckle cover 140 is used to clamp the signal pins 360.
It should be noted that, the lower buckle cover 140 is buckled on the lower bottom surface of the circuit board 310, so that the signal pins 360 are buckled by the lower buckle cover 140. In this way, the signal pins 360 do not need to be soldered on the circuit board 310, so that the hall sensor 340 is prevented from being damaged by soldering at high temperature.
As shown in fig. 1 to 5, in one embodiment, a plurality of signal pins 360 are provided, each signal pin 360 is divided into two groups, and the two groups of signal pins 360 are respectively located below the two hall sensors 340.
It should be noted that, for example, three signal pins 360 are provided in each group, and in one embodiment, the signal pins 360 are in a metal cylinder structure.
As shown in fig. 2, 3 and 5, in an embodiment, the middle portion of the second rotating shaft 220 is configured as an arc structure, the arc structure is provided with a through waist-shaped hole 221, and the rocker 230 is disposed through the waist-shaped hole 221.
It should be noted that, when the rocker 230 drives the second rotating shaft 220 to rotate, in order to avoid the excessive rotation amount of the second rotating shaft 220, the second rotating shaft 220 is set to an arch structure at the middle position, and a waist-shaped hole 221 is formed in the arch structure, the rocker 230 passes through the waist-shaped hole 221, when the rocker 230 moves along the waist-shaped hole 221, the rocker 230 is used for driving the first rotating shaft 210 to rotate, when the rocker 230 pushes against the side wall of the waist-shaped hole 221, the first rotating shaft 210 is not moved, and the rocker 230 drives the second rotating shaft 220 to rotate.
As shown in fig. 1, in one embodiment, the reversing assembly 200 further includes a cap 250, the cap 250 being disposed on top of the rocker 230.
It should be noted that, the cap 250 is fixedly installed at the top end of the rocker 230, so that the user swings the rocker 230 by shaking the cap 250. In one embodiment, the cap 250 is provided with a hemispherical shell such that when the hall rocker potentiometer 10 is mounted on the handle, the hemispherical shell can block the gap around the rocker 230.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. A hall rocker potentiometer, comprising:
A housing;
The reversing assembly comprises a first rotating shaft, a second rotating shaft, a rocker and a reset piece, wherein the first rotating shaft and the second rotating shaft are both rotationally arranged in the shell, the axial horizontal projection of the first rotating shaft is mutually perpendicular to the axial horizontal projection of the second rotating shaft, one end of the rocker is rotationally connected with the first rotating shaft, the other end of the rocker penetrates through the second rotating shaft and extends out of the top of the shell, the reset piece is positioned below the rocker, and the reset piece is respectively abutted with the rocker and the shell;
The signal assembly comprises a circuit board, an IC chip, two magnets and two Hall sensors, wherein the circuit board is arranged on the outer side wall of the shell, the IC chip is arranged on the circuit board, the two Hall sensors are electrically connected with the IC chip, one of the two magnets is arranged on one end of the first rotating shaft, the other of the two magnets is arranged on one end of the second rotating shaft, and the two magnets are respectively aligned with the two Hall sensors.
2. The hall rocker potentiometer according to claim 1, wherein the housing comprises a bottom plate, a buckling shell and two side shells, the buckling shell is buckled on the bottom plate, so that the first rotating shaft and the second rotating shaft are both rotatably arranged between the buckling shell and the bottom plate, the two side shells are respectively clamped on two outer side walls of the buckling shell, the two side shells are respectively clamped with the circuit board, and the two hall sensors are respectively positioned in the two side shells.
3. The hall rocker potentiometer according to claim 2, wherein the signal assembly further comprises a key, the key is arranged on the bottom plate and is abutted against the buckle shell, and one end of the first rotating shaft, which is far away from the magnet, is abutted against the input end of the key.
4. The hall rocker potentiometer according to claim 3, wherein the reset member comprises a spring and a top block, the top block is slidably disposed on the bottom plate along a vertical direction, the spring is disposed between the top block and the bottom plate, and the spring is used for pushing the top block, so that the top block is propped against the bottom end of the rocker.
5. The hall rocker potentiometer according to claim 4, wherein a top flat surface is arranged on one side of the top block, which is close to the rocker, and a top flat surface is arranged on one side of the rocker, which is close to the top block, and the top flat surface is abutted against the top flat surface.
6. The hall rocker potentiometer of claim 2 wherein the signal assembly further comprises a signal pin electrically connected to the IC chip and extending from a lower surface of the circuit board.
7. The hall rocker potentiometer according to claim 6, wherein the housing further comprises a lower buckle cover, wherein the lower buckle cover is buckled on the lower bottom surface of the circuit board, and the lower buckle cover is used for clamping the signal pins.
8. The hall rocker potentiometer according to claim 6 or 7, wherein a plurality of signal pins are provided, each signal pin is divided into two groups, and the two groups of signal pins are respectively positioned below the two hall sensors.
9. The hall rocker potentiometer according to claim 1, wherein the middle part of the second rotating shaft is provided with an arch structure, a through waist-shaped hole is formed in the arch structure, and the rocker penetrates through the waist-shaped hole.
10. The hall rocker potentiometer of claim 1 wherein the reversing assembly further comprises a cap disposed on top of the rocker.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202323082466.4U CN221281840U (en) | 2023-11-14 | 2023-11-14 | Hall rocker potentiometer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202323082466.4U CN221281840U (en) | 2023-11-14 | 2023-11-14 | Hall rocker potentiometer |
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Publication Number | Publication Date |
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CN221281840U true CN221281840U (en) | 2024-07-05 |
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CN202323082466.4U Active CN221281840U (en) | 2023-11-14 | 2023-11-14 | Hall rocker potentiometer |
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CN (1) | CN221281840U (en) |
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2023
- 2023-11-14 CN CN202323082466.4U patent/CN221281840U/en active Active
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