Linear motors and electronics
By introducing piezoelectric components and control modules into the linear motor, the collision problem caused by excessive displacement of the oscillator is solved, and more stable and efficient vibration control is achieved, which improves the vibration sensing experience.
Patent Information
- Application Number
- CN202420855324.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-04-23
AI Technical Summary
In the related art, the oscillators of linear motors are prone to excessive displacement, resulting in collision between the oscillators and the shell.
The linear motor design includes a shell, vibrator, elastic member, piezoelectric element and control module is adopted. The elastic force generated by the elastic member is converted into an electrical signal through the piezoelectric element. The control module determines the position of the vibrator based on the electrical signal, thereby controlling the speed and direction of the vibrator to avoid collision.
It effectively avoids collision between the vibrator and the shell, maximizes the vibration amount of the vibrator, improves the vibration sensing experience, and enriches the waveform design.
Smart Images
Figure CN222706383U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of motor technology, and in particular to a linear motor and an electronic device. Background Art
[0002] A linear motor is a transmission device that converts electrical energy directly into linear motion mechanical energy without the need for any intermediate conversion mechanism.
[0003] In the related art, the linear motor includes a housing, a vibrator, two elastic parts and a control module. The two elastic parts are respectively located on both sides of the vibrator, and the elastic parts are connected to the inner wall of the housing. The control module drives the vibrator to perform reciprocating motion.
[0004] However, the vibrator of the linear motor in the related art is prone to excessive displacement, which may cause the vibrator to collide with the housing. Utility Model Content
[0005] The present disclosure provides a linear motor and an electronic device, which can solve the technical problems existing in the related art. The technical solutions of the linear motor and the electronic device are as follows.
[0006] In a first aspect, the present disclosure provides a linear motor, the linear motor comprising a housing, a vibrator, an elastic member, a piezoelectric element and a control module;
[0007] The vibrator, the elastic member and the piezoelectric element are located inside the housing;
[0008] The number of the elastic members is two, and the two elastic members are respectively located on two sides of the vibrator;
[0009] The piezoelectric element is located between the housing and the elastic member;
[0010] The control module is electrically connected to the piezoelectric element and the vibrator. The control module is used to control the vibration of the vibrator and to determine the position of the vibrator according to the electrical signal output by the piezoelectric element.
[0011] In a possible implementation, the linear motor includes two piezoelectric elements, and the two piezoelectric elements are respectively located on both sides of the two elastic members.
[0012] In a possible implementation manner, the two piezoelectric elements have the same thickness.
[0013] In a possible implementation, the linear motor further includes a base;
[0014] The base is located between the elastic member and the piezoelectric element.
[0015] In a possible implementation, the width L1 of the base is the same as the width L2 of the piezoelectric element;
[0016] The height H1 of the base is the same as the height H2 of the piezoelectric element.
[0017] In a possible implementation, the thickness D of the piezoelectric element is 0.5 mm-1 mm.
[0018] In a possible implementation manner, the piezoelectric element is a ceramic sheet.
[0019] In a possible implementation manner, the elastic member is a spring.
[0020] In a possible implementation, the control module includes a central processing unit, a driving module and a signal processing module;
[0021] The central processor, the driving module and the vibrator are electrically connected in sequence, and the central processor is used to control the driving module to drive the vibrator to vibrate;
[0022] The piezoelectric element, the signal processing module and the central processing unit are electrically connected in sequence, and the signal processing module is used to determine the position of the vibrator according to the electrical signal output by the piezoelectric element.
[0023] In a second aspect, the present disclosure provides an electronic device, comprising a linear motor as described in any one of the first aspects.
[0024] The technical solution provided by the present disclosure includes at least the following beneficial effects:
[0025] The present disclosure provides a linear motor. When the vibrator vibrates, the elastic member will be stretched or compressed, so that the elastic member will generate elastic force. Since there is a piezoelectric element between the elastic member and the shell, the elastic member can apply elastic force to the piezoelectric element, and the piezoelectric element can convert the pressure received into an electrical signal. Since the length of the stretching or compression of the elastic member is different, the pressure applied to the piezoelectric element is also different. Therefore, the control module can confirm the length of the stretching or compression of the elastic member according to the electrical signal output by the piezoelectric element, thereby determining the displacement of the vibrator, and then determining the position of the vibrator. In this way, the control module can control the speed and direction of the vibrator according to the position of the vibrator, thereby avoiding the collision between the vibrator and the shell. In addition, the vibration amount of the vibrator can be maximized, the vibration experience is enhanced, and the waveform design is enriched.
[0026] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description, are used to explain the principles of the present disclosure. In the drawings:
[0028] Figure 1 is a schematic structural diagram of a linear motor shown in an embodiment of the present disclosure;
[0029] Figure 2 is a schematic structural diagram of a linear motor shown in an embodiment of the present disclosure;
[0030] Figure 3 is a partial structural schematic diagram of a linear motor shown in an embodiment of the present disclosure;
[0031] Figure 4 is an exploded view of a piezoelectric element and a base shown in an embodiment of the present disclosure;
[0032] Figure 5 It is a schematic diagram of a control module shown in an embodiment of the present disclosure.
[0033] Legend:
[0034] 1. Shell;
[0035] 2. Vibrator;
[0036] 3. Elastic parts;
[0037] 4. Piezoelectric element;
[0038] 5. control module, 51. central processing unit, 52. drive module, 53. signal processing module;
[0039] 6. Base.
[0040] The above drawings show clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION
[0041] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.
[0042] The terms used in the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure, and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with ordinary skills in the field to which the present disclosure belongs. The words "first", "second", "third" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limit, but indicate that there is at least one. Words such as "include" or "include" mean that the elements or objects appearing in front of "include" or "include" include the elements or objects listed after "include" or "include" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0043] A linear motor is a transmission device that converts electrical energy directly into mechanical energy of linear motion without any intermediate conversion mechanism. In the related art, a linear motor includes a housing, a vibrator, two elastic parts, and a control module. The two elastic parts are respectively located on both sides of the vibrator, and the elastic parts are connected to the inner wall of the housing. The control module drives the vibrator to reciprocate. However, the vibrator of the linear motor in the related art is prone to excessive displacement, which causes the vibrator to collide with the housing.
[0044] In view of the above technical problems, Figure 1 As shown, the embodiment of the present disclosure provides a linear motor, such as Figure 1 As shown, the linear motor includes a housing 1, a vibrator 2, an elastic member 3, a piezoelectric element 4 and a control module 5. The vibrator 2, the elastic member 3 and the piezoelectric element 4 are located inside the housing 1. There are two elastic members 3, and the two elastic members 3 are respectively located on both sides of the vibrator 2. The piezoelectric element 4 is located between the housing 1 and the elastic member 3. The control module 5 is electrically connected to the piezoelectric element 4 and the vibrator 2, and the control module 5 is used to control the vibration of the vibrator 2, and is used to determine the position of the vibrator 2 according to the electrical signal output by the piezoelectric element 4.
[0045] The housing 1 is in the shape of a rectangular parallelepiped. The piezoelectric element 4 can be located between any elastic member 3 and the housing 1 .
[0046] The vibrator 2 includes a mass, a magnet and a coil. The control module 5 energizes the coil so that the coil generates a magnetic field and interacts with the magnet to drive the mass to move. The control module 5 controls the movement speed and direction of the vibrator 2 by controlling the magnitude and direction of the current in the coil.
[0047] The greater the pressure on the piezoelectric element 4, the stronger the output electrical signal. The piezoelectric element 4 has a piezoelectric effect, and the electrical signal and pressure are converted according to the piezoelectric equation.
[0048] According to the technical solution provided by the embodiment of the present disclosure, when the vibrator 2 vibrates, the elastic member 3 will be stretched or compressed, so that the elastic member 3 will generate elastic force. Since there is a piezoelectric element 4 between the elastic member 3 and the shell, the elastic member 3 can apply elastic force to the piezoelectric element 4, and the piezoelectric element 4 can convert the pressure received into an electrical signal. Since the length of the stretching or compression of the elastic member 3 is different, the pressure applied to the piezoelectric element 4 is also different. Therefore, the control module 5 can confirm the length of the stretching or compression of the elastic member 3 according to the electrical signal output by the piezoelectric element 4, thereby determining the displacement of the vibrator 2, and then determining the position of the vibrator 2. In this way, the control module 5 can control the speed and direction of the vibrator 2 according to the position of the vibrator 2, thereby avoiding the collision between the vibrator 2 and the shell 1. In addition, it can also maximize the vibration amount of the vibrator 2, enhance the vibration experience, and enrich the waveform design.
[0049] In some examples, such as Figure 2 As shown, the linear motor includes two piezoelectric elements 4 , and the two piezoelectric elements 4 are respectively located on both sides of the two elastic members 3 .
[0050] When the vibrator 2 moves toward one of the piezoelectric elements 4, the elastic member 3 between the vibrator 2 and the piezoelectric element 4 will be compressed, and pressure will be generated on the piezoelectric element 4. The calculation formula of the pressure is F=kx (F is pressure, k is the elastic coefficient of the elastic member 3, and x is the displacement of the vibrator 2). Correspondingly, the elastic member 3 between the other piezoelectric element 4 and the vibrator 2 will stretch, thereby generating a pulling force on the piezoelectric element 4, and the magnitude of the pulling force is also F. Both piezoelectric elements 4 will convert the received pressure signals into electrical signals and send the electrical signals to the control module 5. The control module 5 can determine the displacement of the vibrator 2 based on the electrical signals, and then determine the position of the vibrator 2. The provision of two piezoelectric elements 4 can make the position information of the vibrator 2 obtained by the control module 5 more accurate.
[0051] In some examples, the thickness of the two piezoelectric elements 4 is the same.
[0052] In some examples, such as Figure 3As shown, the linear motor further includes a base 6, and the base 6 is located between the elastic member 3 and the piezoelectric element 4. Both sides of the base 6 can directly abut against the elastic member 3 and the piezoelectric element 4, or can be connected to the elastic member 3 and the piezoelectric element 4 by gluing.
[0053] When the elastic member 3 is compressed or stretched, it can generate elastic force on the base 6, and the base 6 transmits the elastic force to the piezoelectric element 4, and the piezoelectric element 4 converts the pressure signal into an electrical signal. The base 6 can evenly transmit the force to the piezoelectric element 4, so that the piezoelectric element 4 is more evenly stressed, so that the electrical signal converted by the piezoelectric element 4 can more accurately reflect the displacement of the vibrator 2, so that the control module 5 can more accurately obtain the position of the vibrator 2.
[0054] In some examples, such as Figure 4 As shown, the width L1 of the base 6 is the same as the width L2 of the piezoelectric element 4, and the height H1 of the base 6 is the same as the height H2 of the piezoelectric element 4. That is, the force-bearing surface of the base 6 and the force-bearing surface of the piezoelectric element 4 are the same in shape and size. In this way, the force on the piezoelectric element 4 can be made more uniform, which is conducive to the control module 5 to obtain the position of the vibrator 2 more accurately.
[0055] In some examples, such as Figure 2 As shown, the thickness D of the piezoelectric element 4 is 0.5 mm-1 mm. If the thickness D of the piezoelectric element 4 is too large, the movement space of the vibrator 2 will be reduced, making the amplitude of the vibrator 2 smaller, thereby reducing the vibration effect of the linear motor. Therefore, setting the thickness D of the piezoelectric element 4 to 0.5 mm-1 mm has little effect on the movement space of the vibrator 2, so that the vibrator 2 can still maintain a large amplitude.
[0056] In some examples, the piezoelectric element 4 is a ceramic sheet. The ceramic sheet can also be called a piezoelectric ceramic. The piezoelectric coefficient of the piezoelectric ceramic is relatively high and the response speed is relatively fast, so that the control module 5 can quickly obtain the current position of the vibrator 2.
[0057] Of course, in other examples, the piezoelectric element 4 may also be made of other materials, such as high molecular polymer, which is not specifically limited in the embodiments of the present disclosure.
[0058] In some examples, the elastic member 3 is a spring. One end of the spring can be attached to the vibrator 2, and when the vibrator 2 is at the center of the housing 1, the spring can be in a free state (the spring is neither stretched nor compressed).
[0059] Of course, in other examples, the elastic member 3 may also be other elements, such as elastic rubber or buffer cotton.
[0060] In some examples, such as Figure 5As shown, the control module 5 includes a central processing unit 51, a driving module 52 and a signal processing module 53. The central processing unit 51, the driving module 52 and the vibrator 2 are electrically connected in sequence, and the central processing unit 51 is used to control the driving module 52 to drive the vibrator 2 to vibrate. The piezoelectric element 4, the signal processing module 53 and the central processing unit 51 are electrically connected in sequence, and the signal processing module 53 is used to determine the position of the vibrator 2 according to the electrical signal output by the piezoelectric element 4.
[0061] When the position of the vibrator 2 obtained by the signal processing module 53 is about to collide with the housing 1, the central processor 51 can control the driving module 52 to interrupt the current in the coil of the vibrator 2, so that the vibrator 2 stops moving. Alternatively, a reverse current is input to the coil of the vibrator 2, so that the vibrator 2 moves in the opposite direction.
[0062] An embodiment of the present disclosure also provides an electronic device, which includes the above-mentioned linear motor.
[0063] The electronic device may be a mobile phone. When a call comes in, the linear motor may vibrate, thereby driving the mobile phone to vibrate, thereby reminding the user.
[0064] In the application scenario of a mobile phone, when the mobile phone plays music, the linear motor vibrates. If a call suddenly comes in at this time, the linear motor will also vibrate, which may suddenly increase the amplitude of the vibrator 2, causing the vibrator 2 to easily collide with the shell 1. Since the linear motor provided in the embodiment of the present disclosure has a piezoelectric element 4, the control module 5 can further determine the position of the vibrator 2. In this way, the control module 5 can control the speed and direction of the vibrator 2 according to the position of the vibrator 2, thereby avoiding the collision between the vibrator 2 and the shell 1.
[0065] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present disclosure shall be included in the protection scope of the present disclosure.
Claims
1. A linear motor, characterized in that: The linear motor comprises a housing (1), a vibrator (2), an elastic member (3), a piezoelectric element (4) and a control module (5); The vibrator (2), the elastic member (3) and the piezoelectric element (4) are located inside the housing (1); The number of the elastic members (3) is two, and the two elastic members (3) are respectively located on two sides of the vibrator (2); The piezoelectric element (4) is located between the housing (1) and the elastic member (3); The control module (5) is electrically connected to the piezoelectric element (4) and the vibrator (2); the control module (5) is used to control the vibration of the vibrator (2) and to determine the position of the vibrator (2) based on the electrical signal output by the piezoelectric element (4).
2. The linear motor according to claim 1, characterized in that: The linear motor comprises two piezoelectric elements (4), and the two piezoelectric elements (4) are respectively located on both sides of the two elastic members (3).
3. The linear motor according to claim 2, characterized in that: The two piezoelectric elements (4) have the same thickness.
4. The linear motor according to claim 1, characterized in that: The linear motor also includes a base (6); The base (6) is located between the elastic member (3) and the piezoelectric element (4).
5. The linear motor according to claim 4, characterized in that: The width L1 of the base (6) is the same as the width L2 of the piezoelectric element (4); The height H1 of the base (6) is the same as the height H2 of the piezoelectric element (4).
6. The linear motor according to claim 1, characterized in that: The thickness D of the piezoelectric element (4) is 0.5 mm-1 mm.
7. The linear motor according to claim 1, characterized in that: The piezoelectric element (4) is a ceramic sheet.
8. The linear motor according to claim 1, characterized in that: The elastic member (3) is a spring.
9. The linear motor according to any one of claims 1 to 8, characterized in that: The control module (5) comprises a central processing unit (51), a driving module (52) and a signal processing module (53); The central processor (51), the driving module (52) and the vibrator (2) are electrically connected in sequence, and the central processor (51) is used to control the driving module (52) to drive the vibrator (2) to vibrate; The piezoelectric element (4), the signal processing module (53) and the central processing unit (51) are electrically connected in sequence, and the signal processing module (53) is used to determine the position of the vibrator (2) according to the electrical signal output by the piezoelectric element (4).
10. An electronic device, characterized in that: The electronic device comprises the linear motor as claimed in any one of claims 1 to 9.