CN216849527U - Electromagnetic induction type potentiometer and electric appliance - Google Patents
Electromagnetic induction type potentiometer and electric appliance Download PDFInfo
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- CN216849527U CN216849527U CN202220133881.4U CN202220133881U CN216849527U CN 216849527 U CN216849527 U CN 216849527U CN 202220133881 U CN202220133881 U CN 202220133881U CN 216849527 U CN216849527 U CN 216849527U
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Abstract
The utility model provides an electromagnetic induction potentiometer and an electric appliance, which comprises a shell, a rotor, a magnetic induction device, a first permanent magnet and a second permanent magnet, wherein the shell is provided with a first cavity; the rotor is rotatably arranged in the first cavity; the first permanent magnet is arranged on the rotor; the second permanent magnet is arranged on the rotor, wherein the first permanent magnet and the second permanent magnet are respectively arranged on two opposite sides of the magnetic induction device, the polarities of the first permanent magnet and the second permanent magnet facing to one pole of the magnetic induction device are opposite, and the magnetic strengths of the first permanent magnet and the second permanent magnet facing to one pole of the magnetic induction device are different, so that the voltages output by the magnetic induction device facing to one pole of the magnetic induction device are the same. The electromagnetic induction potentiometer solves the problem that the magnetic strength of the N pole and the S pole of a single permanent magnet is the same, so that the output voltage of a magnetic induction device is different.
Description
Technical Field
The utility model belongs to the technical field of the electron technique and specifically relates to an electric appliance of electromagnetic induction formula potentiometre and applied this electromagnetic induction formula potentiometre.
Background
A potentiometer is a type of variable resistor, and is generally composed of a resistor body and a rotating or sliding system, i.e., a moving contact moves on the resistor body to obtain a partial voltage output. Most of traditional potentiometers use carbon films or resistance wire structures, and a contact is required to be in contact with the carbon films for friction, so that detection of different positions of the potentiometers is achieved. The contact structure of the traditional potentiometer has the following defects: (1) the carbon film has short abrasion life and large production error; (2) due to the friction of the connecting points, the position of the connecting points is changed, and the connecting points generate contact interference noise, and if the connecting points are used as a sound box and the like for adjusting the volume, the connecting points have the noise of hula.
The electromagnetic induction type potentiometer overcomes the defects, uses the permanent magnet as a rotating or sliding part assembly, and uses the linear Hall sensor to detect the position of the permanent magnet in real time. The electromagnetic induction potentiometer has no contact, no abrasion and no noise interference during adjustment when the position is adjusted. Chinese patent application No. CN202110678873.8 proposes a scheme of an adaptive full stroke detection electromagnetic induction potentiometer.
However, in the electromagnetic induction type potentiometer in the related art, because the linear hall sensors have different magnetic pole sensitivities to the permanent magnet, and the same magnetic strengths of the N-level and the S-level of the same magnet are the same, the output voltages of the hall sensors are different, and the accuracy of the electromagnetic induction type potentiometer is not high enough.
Therefore, it is necessary to provide a new electromagnetic induction type potentiometer to solve the above problems.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model provides a higher electromagnetic induction formula potentiometre of precision and applied this electromagnetic induction formula potentiometre's electrical apparatus.
The utility model discloses a following technical scheme realizes:
the utility model provides an electromagnetic induction formula potentiometre, electromagnetic induction formula potentiometre includes:
a housing formed with a first cavity;
a rotor rotatably disposed within the first cavity;
a magnetic induction device;
a first permanent magnet disposed on the rotor; and
the second permanent magnet, it sets up on the rotor, wherein, first permanent magnet with the second permanent magnet divides to establish the relative both sides of magnetic induction device, just first permanent magnet with the second permanent magnet orientation the polarity of a utmost point of magnetic induction device is opposite, first permanent magnet with the second permanent magnet orientation a utmost point of magnetic induction device is relative the magnetic strength of magnetic induction device is different, so that the magnetic induction device is relative first permanent magnet with the second permanent magnet orientation the voltage of a utmost point output of magnetic induction device is the same.
As an embodiment of the utility model, first storage tank and second storage tank have been seted up on the rotor, first permanent magnet accomodate in the first storage tank, the second permanent magnet accomodate in the second storage tank.
As an embodiment of the utility model, the central line of magnetic induction device with the plane that the axis of rotation of rotor formed is the reference surface, first storage tank with the second storage tank is relative the reference surface symmetry sets up, the magnetic strength of first permanent magnet is less than the magnetic strength of second permanent magnet, just the N utmost point orientation of first permanent magnet the magnetic induction device, the S utmost point orientation of second permanent magnet the magnetic induction device.
As an embodiment of the utility model, the central line of magnetic induction device with the plane that the axis of rotation of rotor formed is the reference surface, first permanent magnet with the distance of reference surface is greater than the second permanent magnet with the distance of reference surface, the N utmost point orientation of first permanent magnet the magnetic induction device, the S utmost point orientation of second permanent magnet the magnetic induction device.
As an embodiment of the present invention, the housing is provided with a second cavity, and the magnetic induction device is accommodated in the second cavity; the rotor is provided with a slot for receiving an external rotational input.
As an embodiment of the present invention, the first permanent magnet is a neodymium iron boron or ferrite magnet, and the second permanent magnet is a neodymium iron boron or ferrite magnet.
As an embodiment of the present invention, the housing is provided with a stroke groove, a center of the stroke groove is located on a central axis of the rotor, and at least a part of the rotor is accommodated in the stroke groove.
As an embodiment of the utility model, the shell is in the middle part of first cavity is equipped with the circular through-hole, the rotor the through-hole both sides are equipped with the claw knot, the claw knot lock joint in the edge of circular through-hole.
As an embodiment of the present invention, the magnetic induction device is a linear hall sensor.
The utility model discloses still provide an electrical apparatus, include as above in any embodiment the electromagnetic induction formula potentiometre.
The utility model has the advantages that:
the embodiment of the utility model provides an in, owing to be equipped with two permanent magnets of first permanent magnet and second permanent magnet, thereby can adjust the distance of first permanent magnet and the relative magnetic induction device of second permanent magnet according to the demand, or adjust the size of the magnetic strength of first permanent magnet and second permanent magnet according to the demand, can make first permanent magnet and second permanent magnet different towards the magnetic strength of the relative magnetic induction device of a utmost point of magnetic induction device, and make the relative first permanent magnet of magnetic induction device and the voltage of the output of second permanent magnet towards a utmost point of magnetic induction device the same. Therefore, the problem of difference of output voltage of the magnetic induction device caused by the fact that the N pole and the S pole of a single permanent magnet are the same in magnetic strength is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an electromagnetic induction type potentiometer according to an embodiment of the present invention;
FIG. 2 is a schematic view of the exploded structure of FIG. 1;
FIG. 3 is a schematic structural view of a rotor portion of FIG. 1;
FIG. 4 is a schematic view of the housing portion of FIG. 1;
wherein: a. a reference plane; 100. a housing; 101. a first cavity; 102. a second cavity; 103. a circular through hole; 110. side clamping pieces; 200. a rotor; 210. a claw buckle; 220. a circular arc protrusion; 201. a first accommodating groove; 202. a second accommodating groove; 203. a slot; 300. a magnetic induction device; 400. a first permanent magnet; 500. a second permanent magnet.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-4, an embodiment of the present invention provides an electromagnetic induction type potentiometer, which is mainly applied to an electrical appliance, such as a household electrical appliance, or an industrial device, and can solve the problem of insufficient precision of the electromagnetic induction type potentiometer in the related art.
Specifically, the electromagnetic induction type potentiometer in the present embodiment includes a housing 100, a rotor 200, a magnetic induction device 300, a first permanent magnet 400, and a second permanent magnet 500, the housing 100 being formed with a first cavity 101; the rotor 200 is rotatably arranged in the first cavity 101; the rotor 200 is rotatable relative to the magnetic induction device 300; the first permanent magnet 400 is disposed on the rotor 200; the second permanent magnet 500 is disposed on the rotor 200, wherein the first permanent magnet 400 and the second permanent magnet 500 are respectively disposed on two opposite sides of the magnetic induction device 300, the polarities of the first permanent magnet 400 and the second permanent magnet 500 facing one pole of the magnetic induction device 300 are opposite, and the magnetic strengths of the first permanent magnet 400 and the second permanent magnet 500 facing one pole of the magnetic induction device 300 are different from those of the magnetic induction device 300, so that the voltages output by the magnetic induction device 300 facing one pole of the magnetic induction device 300 are the same relative to the first permanent magnet 400 and the second permanent magnet 500.
In this embodiment, two permanent magnets, namely the first permanent magnet 400 and the second permanent magnet 500, are provided, so that the distance between the first permanent magnet 400 and the second permanent magnet 500 relative to the magnetic induction device 300 can be adjusted according to requirements, or the magnetic strength of the first permanent magnet 400 and the second permanent magnet 500 can be adjusted according to requirements, the magnetic strength of the first permanent magnet 400 and the second permanent magnet 500 towards the magnetic induction device 300 is different from that of one pole of the magnetic induction device 300, and the voltage output by the magnetic induction device 300 towards the one pole of the magnetic induction device 300 from the first permanent magnet 400 and the second permanent magnet 500 is the same. Therefore, the problem that the magnetic strength of the N pole and the S pole of a single permanent magnet is the same, so that the output voltage of the magnetic induction device 300 is different is solved.
Preferably, the magnetic induction device 300 is disposed on the housing 100, and of course, the magnetic induction device 300 may also be disposed outside the housing 100, i.e. the magnetic induction device 300 is not directly disposed on the housing 100.
Referring to fig. 3, in an embodiment, the rotor 200 is provided with a first receiving groove 201 and a second receiving groove 202, the first permanent magnet 400 is received in the first receiving groove 201, and the second permanent magnet 500 is received in the second receiving groove 202. First permanent magnet 400 and second permanent magnet 500 can be used for stably fixing through first storage tank 201 and second storage tank 202 to can prevent first permanent magnet 400 and second permanent magnet 500 from droing, improve the job stabilization nature of this electromagnetic induction formula potentiometre, and make in the production and the test procedure of electromagnetic induction formula potentiometre, it is more convenient to first permanent magnet 400 and second permanent magnet 500's dismouting.
It should be noted that the shapes of the first receiving groove 201 and the second receiving groove 202 are not limited, and may be circular grooves, rectangular grooves, or grooves with other shapes, and likewise, the shapes of the first permanent magnet 400 and the second permanent magnet 500 are also not limited, and preferably, the shapes of the first permanent magnet 400 and the second permanent magnet 500 are respectively matched with the first receiving groove 201 and the second receiving groove 202.
Further, the magnetic induction device 300 is a linear hall sensor.
Referring to fig. 1 to 4, in an embodiment, a plane formed by a center line of the magnetic induction device 300 and a rotation axis of the rotor 200 is a reference plane a, the first receiving groove 201 and the second receiving groove 202 are symmetrically disposed relative to the reference plane a, a magnetic strength of the first permanent magnet 400 is smaller than a magnetic strength of the second permanent magnet 500, an N pole of the first permanent magnet 400 faces the magnetic induction device 300, and an S pole of the second permanent magnet 500 faces the magnetic induction device 300. In this embodiment, since the N pole and the S pole with the same magnetic strength are larger than the S pole, the distances from the first accommodating groove 201 and the second accommodating groove 202 to the magnetic induction device 300 are the same by symmetrically arranging the first accommodating groove 201 and the second accommodating groove 202 relative to the reference plane a, but the magnetic strength of the first permanent magnet 400 is smaller than the magnetic strength of the second permanent magnet 500, so that the N pole of the first permanent magnet 400 with smaller magnetic strength and the S pole of the second permanent magnet 500 with larger magnetic strength are the same as each other for the magnetic induction device 300, and the voltage output by the magnetic induction device 300 is the same as the N pole of the first permanent magnet 400 and the S pole of the second permanent magnet 500, so that the accuracy of the electromagnetic induction type potentiometer is higher.
In another specific embodiment, a plane formed by the center line of the magnetic induction device 300 and the rotation axis of the rotor 200 is a reference plane a, a distance between the first permanent magnet 400 and the reference plane a is greater than a distance between the second permanent magnet 500 and the reference plane a, a magnetic strength of the first permanent magnet 400 is the same as that of the second permanent magnet 500, an N pole of the first permanent magnet 400 faces the magnetic induction device 300, and an S pole of the second permanent magnet 500 faces the magnetic induction device 300. In this embodiment, since the magnetic strengths of the first permanent magnet 400 and the second permanent magnet 500 are the same, the distance between the first permanent magnet 400 and the reference plane a is greater than the distance between the second permanent magnet 500 and the reference plane a, so that the N pole of the first permanent magnet 400 is farther from the magnetic induction device 300 than the S pole of the second permanent magnet 500, and the sensitivity of the N pole of the first permanent magnet 400 and the sensitivity of the S pole of the second permanent magnet 500 with greater magnetic strength to the magnetic induction device 300 are greater than the sensitivity of the N pole of the second permanent magnet 500 with greater magnetic strength to the magnetic induction device 300 due to the N pole and the S pole with the same magnetic strengths, so that the voltage output by the magnetic induction device 300 is the same with respect to the N pole of the first permanent magnet 400 and the S pole of the second permanent magnet 500, thereby making the accuracy of the electromagnetic induction type potentiometer higher.
The center line of the magnetic induction device 300 is a straight line passing through the center of the magnetic induction device 300 in the vertical direction.
It should be noted that, in some other embodiments, the magnetic strength of the first permanent magnet 400 may be different from the magnetic strength of the second permanent magnet 500, and the distance between the first permanent magnet 400 and the reference plane a is different from the distance between the second permanent magnet 500 and the reference plane a, so that the output voltages at the two sides of the magnetic induction device 300 are only required to be kept consistent.
In other embodiments, the electromagnetic induction type potentiometer may further include a third permanent magnet, even a fourth permanent magnet, a fifth permanent magnet, or more permanent magnets, and only the output voltages at the two sides of the magnetic induction device 300 need to be kept consistent through cooperation between the plurality of permanent magnets.
In a specific embodiment, the first permanent magnet 400 is a ndfeb or ferrite magnet and the second permanent magnet 500 is a ndfeb or ferrite magnet.
Specifically, referring to fig. 1 and fig. 4, in an embodiment, the housing 100 is provided with a second cavity 102, and the magnetic induction device 300 is received in the second cavity 102; the rotor 200 is provided with a slot 203 for receiving an external rotational input.
The embodiment of the utility model provides an in, the rotation output shaft of external part is pegged graft in slot 203, and the rotation of external part can drive rotor 200 and rotate, and first permanent magnet 400 and second permanent magnet 500 also rotate along with rotor 200, and magnetic induction device 300 responds to the position change and the output signal of first permanent magnet 400 and second permanent magnet 500, and this output signal can reflect external part's rotation. As an example, the external component may be a rocker mechanism or a knob.
As an alternative embodiment, the pin is a rectangular through hole.
As an alternative embodiment, the housing 100 is provided with a stroke slot (not shown), the center of which is located on the central axis of the rotor 200. The rotor 200 is at least partially accommodated in the stroke slot, and the rotation track of the rotor 200 is limited by the stroke slot.
Referring to fig. 2 and 4, as an alternative embodiment, the housing 100 is provided with a circular through hole 103 at the middle of the first cavity 101, and the through hole of the rotor 200 is provided with claws 210 at both sides thereof, and the claws 210 are fastened to the edge of the circular through hole 103, so that the rotor 200 is rotatably received in the first cavity 101 of the housing 100 and the rotor 200 is prevented from falling off the housing 100.
Referring to fig. 2 and 3, as an alternative embodiment, the rotor 200 is provided with a circular arc protrusion 220 on a surface near the inner side of the casing 100. The circular arc protrusion 220 can reduce the friction between the rotor 200 and the housing 100 in the working state of the potentiometer.
As an alternative embodiment, magnetic induction device 300 is packaged as an integrated circuit chip.
In practical applications, the magnetic induction device 300 packaged as an integrated circuit chip is soldered on a circuit board, and the combined component composed of the housing 100, the rotor 200, the first permanent magnet 400 and the second permanent magnet 500 is fixed above the magnetic induction device 300.
As an example of an application, when applied to a rocker mechanism, the side latches 110 are respectively disposed on both sides of the housing 100. The housing 100 is fixed to the side of the rocker mechanism through the side clip 110, the rotation output shaft of the rocker mechanism is inserted into the slot 203, and the magnetic induction device 300 packaged as an integrated circuit chip is welded to the lower circuit board of the housing 100.
An embodiment of the utility model provides an electric appliance, this electric appliance include the electromagnetic induction formula potentiometre as in above arbitrary embodiment, because the precision of above-mentioned electromagnetic induction formula potentiometre is higher to make the electrical apparatus performance of using the electromagnetic induction formula potentiometre better.
Of course, the present invention can also have other various embodiments, and based on the embodiments, other embodiments obtained by those skilled in the art without any creative work all belong to the protection scope of the present invention.
Claims (10)
1. An electromagnetic induction type potentiometer, comprising:
a housing formed with a first cavity;
a rotor rotatably disposed within the first cavity;
a magnetic induction device;
a first permanent magnet disposed on the rotor; and
the second permanent magnet, it sets up on the rotor, wherein, first permanent magnet with the second permanent magnet divides to establish the relative both sides of magnetic induction device, just first permanent magnet with the second permanent magnet orientation the polarity of a utmost point of magnetic induction device is opposite, first permanent magnet with the second permanent magnet orientation a utmost point of magnetic induction device is relative the magnetic strength of magnetic induction device is different, so that the magnetic induction device is relative first permanent magnet with the second permanent magnet orientation the voltage of a utmost point output of magnetic induction device is the same.
2. The electromagnetic induction type potentiometer according to claim 1, wherein the rotor has a first receiving slot and a second receiving slot, the first permanent magnet is received in the first receiving slot, and the second permanent magnet is received in the second receiving slot.
3. The electromagnetic induction type potentiometer according to claim 2, wherein a plane formed by the center line of the magnetic induction device and the rotation axis of the rotor is a reference plane, the first receiving groove and the second receiving groove are symmetrically disposed with respect to the reference plane, the magnetic strength of the first permanent magnet is smaller than that of the second permanent magnet, the N-pole of the first permanent magnet faces the magnetic induction device, and the S-pole of the second permanent magnet faces the magnetic induction device.
4. The electromagnetic induction type potentiometer according to claim 2, wherein a plane formed by the center line of the magnetic induction device and the rotation axis of the rotor is a reference plane, the distance between the first permanent magnet and the reference plane is greater than the distance between the second permanent magnet and the reference plane, the magnetic strength of the first permanent magnet is the same as that of the second permanent magnet, the N-pole of the first permanent magnet faces the magnetic induction device, and the S-pole of the second permanent magnet faces the magnetic induction device.
5. The electromagnetic induction type potentiometer according to any of claims 1-4, wherein the housing is provided with a second cavity, and the magnetic induction device is received in the second cavity; the rotor is provided with a slot for receiving an external rotational input.
6. The electromagnetic induction-type potentiometer according to any of claims 1-4, wherein the first permanent magnet is a neodymium-iron-boron or ferrite magnet and the second permanent magnet is a neodymium-iron-boron or ferrite magnet.
7. An electromagnetic induction type potentiometer according to any of claims 1-4, characterized in that the housing is provided with a stroke slot, the center of the stroke slot is located on the central axis of the rotor, and at least part of the rotor is accommodated in the stroke slot.
8. The electromagnetic induction type potentiometer according to any one of claims 1 to 4, wherein the housing is provided with a circular through hole in the middle of the first cavity, and the rotor is provided with claws at both sides of the through hole, and the claws are fastened to the edge of the circular through hole.
9. The electromagnetic induction potentiometer according to any of claims 1-4, wherein the magnetic induction device is a linear Hall sensor.
10. An electrical appliance comprising an electromagnetically inductive potentiometer according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220133881.4U CN216849527U (en) | 2022-01-18 | 2022-01-18 | Electromagnetic induction type potentiometer and electric appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220133881.4U CN216849527U (en) | 2022-01-18 | 2022-01-18 | Electromagnetic induction type potentiometer and electric appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216849527U true CN216849527U (en) | 2022-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220133881.4U Active CN216849527U (en) | 2022-01-18 | 2022-01-18 | Electromagnetic induction type potentiometer and electric appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216849527U (en) |
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2022
- 2022-01-18 CN CN202220133881.4U patent/CN216849527U/en active Active
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