Annular rotating linear driving motor

Abstract

The utility model provides an annular rotary linear driving motor. The annular rotary linear driving motor comprises a rotary carrier, a piezoelectric vibrator, a base, a guide cylinder and a guide piece, the piezoelectric vibrator is arranged in the base, the rotating carrier abuts against the piezoelectric vibrator, one of the guide cylinder and the rotating carrier is arranged outside the other one in a sleeving mode, and a sliding groove is formed in the side wall of the side, facing the guide cylinder, of the rotating carrier in the circumferential direction. The base comprises a second annular plate, the second annular plate is located between the rotating carrier and the guide cylinder, an opening is formed in the second annular plate in the axial direction, and the guide piece is connected to the guide cylinder and arranged in the sliding groove and the opening at the same time; wherein the piezoelectric vibrator is an annular piezoelectric vibrator. According to the technical scheme, the problem that in the prior art, a single linear vibrator is adopted to perform friction driving on the side face of a moving part, so that the moving part often drives a lens assembly to incline in the moving process, and the imaging effect is seriously reduced can be solved; and the linear oscillator is difficult to install and fix, and the driving frequency is high.

Description

Technical Field

[0001] The present application relates to the field of optical element driving technology, and in particular to a ring-shaped rotating linear drive motor. Background Art

[0002] At present, micro-structured ultrasonic motors are widely used in VA, AF, anti-shake and other scenarios of optical lenses in mobile devices. As mobile phone lenses gradually develop towards larger size, heavier weight and longer stroke, motors mainly driven by electromagnetics are difficult to meet the existing market demand, so piezoelectric-driven motors are gradually adopted.

[0003] Mobile phone lens focusing typically uses a single linear vibrator that frictionally drives the side of a moving component. This often causes the moving component to tilt the lens assembly, severely degrading imaging quality. Furthermore, linear vibrators are difficult and cumbersome to install and secure, hindering automated assembly and the cost-effectiveness of high-volume consumer electronics production. Furthermore, the high drive frequency of linear vibrators poses challenges to circuit design and algorithm implementation. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a ring-shaped rotating linear drive motor to solve the problem in the prior art that a single linear vibrator is used to perform friction drive on the side of a moving part, resulting in the phenomenon that the moving part often drives the lens assembly to tilt during movement, seriously reducing the imaging effect; and the linear vibrator is difficult to install and fix, and the driving frequency is high.

[0005] To solve the above technical problems, the embodiments of the present application provide the following technical solutions:

[0006] The present application provides an annular rotary linear drive motor, comprising: a rotating carrier, a piezoelectric vibrator, a base, a guide cylinder, and a guide member; the piezoelectric vibrator is arranged in the base, the rotating carrier is arranged to abut against the piezoelectric vibrator, one of the guide cylinder and the rotating carrier is sleeved outside the other, the side wall of the rotating carrier facing the guide cylinder is provided with a slide groove along the circumferential direction, and the two ends of the slide groove are spaced apart along the axial direction; the base includes a second annular plate, the second annular plate is located between the rotating carrier and the guide cylinder, the second annular plate is provided with an opening along the axial direction, the guide member is connected to the guide cylinder, and is simultaneously provided in the slide groove and the opening;

[0007] Wherein, the piezoelectric vibrator is a ring-shaped piezoelectric vibrator.

[0008] In some modified embodiments of the present application, the guide member is a ball, a guide groove is provided on a side of the guide cylinder facing the rotating carrier, the ball is disposed in both the slide groove and the guide groove, and the ball is disposed in the opening;

[0009] Alternatively, the guide member is a slider, the slider is fixedly connected to the side of the guide cylinder facing the rotating carrier, and the slider passes through the opening and is arranged in the sliding groove.

[0010] In some modified embodiments of the present application, the base further includes a first annular plate and a connecting plate, the connecting plate is arranged between the first annular plate and the second annular plate, and is fixedly connected to the first annular plate and the second annular plate, an annular groove is formed between the first annular plate and the second annular plate, and the piezoelectric vibrator and the rotating carrier are sequentially arranged in the annular groove.

[0011] In some modified embodiments of the present application, the piezoelectric vibrator includes an elastomer, a piezoelectric element and an electrical connector, the elastomer is fixedly connected to the piezoelectric element, the piezoelectric element is electrically connected to the electrical connector, and an electrical signal with a phase difference is applied to different polarization regions of the piezoelectric element, so that the piezoelectric element generates a vibration mode.

[0012] In some modified embodiments of the present application, the elastic body includes an elastic base and a plurality of elastic bosses, the plurality of elastic bosses are arranged at equal intervals on the outer side surface of the elastic base, and the piezoelectric element is arranged on the elastic base.

[0013] In some modified embodiments of the present application, it further includes: a cover plate, which is buckled on the base, and a frustum is provided on the side of the second annular plate facing away from the connecting plate, and the cover plate is clamped with the frustum.

[0014] In some modified embodiments of the present application, a ball groove is provided on the outer wall surface of the rotating carrier, balls are provided in the ball groove, and the balls abut against the inner wall surface of the cover plate.

[0015] In some modified implementations of the present application, it further includes: a corrugated spring piece, wherein the corrugated spring piece is provided between the piezoelectric vibrator and the connecting plate.

[0016] In some modified embodiments of the present application, it further includes: a friction plate, wherein the friction plate is provided between the piezoelectric vibrator and the rotating carrier.

[0017] In some modified embodiments of the present application, it further includes: a detection component, the detection component including a magnet and a sensor, the magnet is arranged on the side of the rotating carrier, and the sensor is fixed on the base and is arranged corresponding to the magnet.

[0018] Compared with the existing technology, the annular rotary linear drive motor provided in the present application applies alternating current with a phase difference to the annular piezoelectric vibrator, so that the piezoelectric vibrator generates a vibration mode and then drives the rotating carrier to generate rotational motion. The guide member moves in the slide groove. Due to the limitation of the opening on the base on the guide member, the guide member drives the guide cylinder and the driven component to generate linear motion, thereby realizing the linear driving function of the annular piezoelectric vibrator; the annular arrangement of the piezoelectric vibrator can make the force on the driven component more uniform, avoid the tilt of the driven component during movement, and greatly improve the imaging effect of the camera in zoom drive. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the exemplary embodiments of the present application will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0020] Figure 1 Schematically shows an exploded view of the annular rotary linear drive motor in the first embodiment;

[0021] Figure 2 The structure diagram of the annular rotary linear drive motor in the first embodiment is schematically shown;

[0022] Figure 3 The structure diagram of the base in the first embodiment is schematically shown;

[0023] Figure 4 The structure diagram of the rotating carrier in the first embodiment is schematically shown;

[0024] Figure 5 The structural diagram of the connection between the guide cylinder and the guide member in the second embodiment is schematically shown.

[0025] Description of Figure Numbers:

[0026] 1. Rotating carrier; 11. Slide groove; 12. Ball bearing groove; 2. Piezoelectric vibrator; 21. Elastomer; 211. Elastic base; 212. Elastic boss; 22. Piezoelectric element; 23. Electrical connector; 231. PIN pin; 3. Base; 31. First annular plate; 32. Second annular plate; 321. Opening; 33. Annular groove; 4. Guide cylinder; 41. Guide groove; 5. Guide member; 6. Cover plate; 7. Corrugated spring; 8. Friction plate; 9. Detection component. DETAILED DESCRIPTION

[0027] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0028] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this application belongs. Example 1

[0029] like Figures 1 to 4 As shown, the present embodiment 1 provides an annular rotary linear drive motor, comprising: a rotating carrier 1, a piezoelectric vibrator 2, a base 3, a guide cylinder 4, a guide member 5, a cover plate 6 and a detection assembly 9; the piezoelectric vibrator 2 is arranged in the base 3, the rotating carrier 1 is arranged in contact with the piezoelectric vibrator 2, the guide cylinder 4 is passed through the base 3 and is movably connected to the rotating carrier 1, a side wall of the rotating carrier 1 facing the guide cylinder 4 is provided with a slide groove 11 along the circumferential direction, and the two ends of the slide groove 11 are arranged at intervals along the axial direction; the base 3 includes a second annular plate 32, the second annular plate 32 is provided between the rotating carrier 1 and the guide cylinder 4, the second annular plate 32 is provided with a plurality of openings 321 along the axial direction, the guide member 5 is connected to the guide cylinder 4, and is simultaneously provided in the slide groove 11 and the opening 321, the cover plate 6 is buckled on the base 3, the cover plate 6 plays an axial pre-compression role on the rotating carrier 1, and the detection assembly 9 is provided between the rotating carrier 1 and the base 3;

[0030] The piezoelectric vibrator 2 is a ring-shaped piezoelectric vibrator, and the number of the sliding grooves 11 is three, which has better stability and can better meet the rotation angle.

[0031] In this embodiment, the guide member 5 is configured as a ball, and a guide groove 41 is provided on the side of the guide cylinder 4 facing the rotating carrier 1. The inner wall of the guide groove 41 is in contact with the ball on four sides, but not absolutely all four sides, as long as the ball does not move in the guide groove 41; the ball is arranged in the slide groove 11 and the guide groove 41 at the same time, and the ball is arranged in the opening 321; wherein the opening 321 is arranged at equal intervals along the axial direction.

[0032] Since the opening 321 on the second annular plate 32 limits the position of the ball, the ball drives the guide cylinder 4 and the driven component to generate linear motion, thereby realizing the linear driving function of the annular piezoelectric vibrator.

[0033] The present application applies alternating current with a phase difference to the annular piezoelectric vibrator, so that the piezoelectric vibrator 2 generates a vibration mode and then drives the rotating carrier 1 to generate rotational motion. The ball moves along the slide groove 11 in the slide groove 11. Due to the limitation of the ball by the opening 321 on the second annular plate 32, the ball drives the guide cylinder 4 and the driven component to generate linear motion, thereby realizing the linear drive function of the annular piezoelectric vibrator; the annular arrangement of the piezoelectric vibrator 2 can make the force on the driven component more uniform, avoid the driven component from tilting during the movement, and greatly improve the imaging effect of the camera in zoom drive.

[0034] like Figure 1 、 Figure 3 As shown, in a specific implementation, the base 3 includes a first annular plate 31, a second annular plate 32 and a connecting plate. The first annular plate 31 is arranged on the outside of the second annular plate 32. The connecting plate is arranged between the first annular plate 31 and the second annular plate 32, and is fixedly connected to the first annular plate 31 and the second annular plate 32. An annular groove 33 is formed between the first annular plate 31 and the second annular plate 32, and the piezoelectric vibrator 2 and the rotating carrier 1 are arranged in the annular groove 33 in sequence.

[0035] Specifically, a first step and a second step are provided on the side of the first annular plate 31 facing the second annular plate 32. The first step and the second step are axially spaced apart along the side of the first annular plate 31. The elastomer 21 in the piezoelectric vibrator 2 is provided on the first step, and the rotating carrier 1 is provided on the second step. The first step and the second step are mainly used to adapt to other components provided in the annular groove 33 to prevent other components from moving in the annular groove 33.

[0036] like Figure 1 As shown, in a specific implementation, the piezoelectric vibrator 2 includes an elastic body 21, a piezoelectric element 22 and an electrical connector 23. The elastic body 21 is fixedly connected to the piezoelectric element 22, and the piezoelectric element 22 is electrically connected to the electrical connector 23. An electrical signal with a phase difference is applied to different polarization regions of the piezoelectric element 22, so that the piezoelectric element 22 generates a vibration mode; the elastic body 21 includes an elastic base 211 and a plurality of elastic bosses 212. The plurality of elastic bosses 212 are arranged at equal intervals on the outer side of the elastic base 211 to facilitate the processing of the elastic bosses 212. , usually stamping is adopted; the piezoelectric element 22 is arranged on the elastic base 211, and the elastic body 21 can amplify the vibration of the piezoelectric element 22, thereby driving the driven component to produce linear motion; wherein, the elastic body 21 is metal, the piezoelectric element 22 is a piezoelectric ceramic piece, the elastic base 211 is integrally formed, the elastic base 211 is annular, and the electrical connector 23 is a PCB circuit board. A PIN pin 231 is provided on the electrical connector 23, and the PIN pin 231 can be led out between any two elastic bosses 212, thereby increasing the applicability of circuit design.

[0037] In a specific implementation, a truncated cone is provided on the side of the second annular plate 32 facing away from the connecting plate, and the cover plate 6 is engaged with the truncated cone. The cover plate 6 exerts an axial pre-compression effect on the rotating carrier 1 .

[0038] like Figure 1 、 Figure 4 As shown, in a specific implementation, a ball groove 12 is provided on the outer wall surface of the rotating carrier 1, and balls are provided in the ball groove 12. The balls abut against the inner wall surface of the cover plate 6. The balls in the ball groove 12 play a role in reducing the friction between the rotating carrier 1 and the cover plate 6, while ensuring the stability of the rotating carrier 1 during movement.

[0039] like Figure 1 As shown, in a specific implementation, a corrugated spring piece 7 is additionally provided. The corrugated spring piece 7 is provided between the piezoelectric vibrator 2 and the connecting plate. The corrugated spring piece 7 plays the role of pre-compression and buffering the deformation of the elastic body 21 .

[0040] like Figure 1 As shown, in a specific implementation, a friction plate 8 is additionally provided. The friction plate 8 is provided between the piezoelectric vibrator 2 and the rotating carrier 1 , and the friction plate 8 plays a role in wear resistance.

[0041] like Figure 1 As shown, in a specific implementation, the detection component 9 includes a magnet and a sensor. The magnet is arranged on the outer side of the rotating carrier 1, and the sensor is fixed on the base 3 and is arranged corresponding to the magnet. The linear motion stroke of the guide cylinder 4 is obtained by detecting the rotation angle of the rotating carrier 1; wherein the sensor is preferably a Hall sensor. Normally, the size of the magnet corresponds to the rotation angle of the rotating carrier 1, ensuring that the sensor can detect the entire path when the rotating carrier 1 rotates.

[0042] Working principle:

[0043] Due to the inverse piezoelectric effect of the piezoelectric element 22, the piezoelectric ceramic piece generates a vibration mode after being energized, which drives the elastic body 21 to deform, and drives the rotating carrier 1 to generate rotational motion. The ball is arranged in the guide groove 41 and rolls in the slide groove 11 and the opening 321 at the same time, driving the guide cylinder 4 to generate linear motion.

[0044] The guide cylinder 4 is used to connect to a driven component, such as a camera, to achieve zoom driving of the camera.

[0045] The number of the guide grooves 41 , the ball grooves 12 and the openings 321 is preferably at least three, which can improve the stability of the entire structure during movement while ensuring the rotation angle. Example 2

[0046] like Figures 1 to 5As shown, the second embodiment provides a ring-shaped rotating linear drive motor. The difference between this embodiment and the first embodiment is that the guide member 5 is configured as a slider, the slider is fixedly connected to the side of the guide cylinder 4 facing the rotating carrier 1, the slider is passed through the opening 321 and is provided in the slide groove 11, and the connection of other components is consistent with the first embodiment and will not be repeated here.

[0047] The slider is fixedly connected to the guide cylinder 4 and slides in the slide groove 11. Due to the limitation of the slider by the opening 321, the slider, the guide cylinder 4 and the driven component produce linear motion, thereby realizing the linear driving function of the annular piezoelectric vibrator. Example 3

[0048] The third embodiment provides a ring-shaped rotating linear drive motor. The difference between this embodiment and the first embodiment is that the guide cylinder 4 is sleeved outside the rotating carrier 1, and the connection of other components is consistent with the first embodiment, which will not be repeated here. Example 4

[0049] The fourth embodiment provides a ring-shaped rotating linear drive motor. The difference between this embodiment and the second embodiment is that the guide cylinder 4 is sleeved outside the rotating carrier 1, and the connection of other components is consistent with that of the first embodiment, which will not be repeated here.

[0050] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A ring-shaped rotary linear drive motor, characterized in that: include: Rotating carrier, piezoelectric vibrator, base, guide cylinder and guide member; The piezoelectric vibrator is arranged in the base, the rotating carrier is arranged in contact with the piezoelectric vibrator, one of the guide cylinder and the rotating carrier is sleeved outside the other, and a sliding groove is provided on a side wall of the rotating carrier facing the guide cylinder along the circumferential direction, and the two ends of the sliding groove are spaced apart along the axial direction; the base includes a second annular plate, the second annular plate is located between the rotating carrier and the guide cylinder, and the second annular plate is provided with an opening along the axial direction; the guide member is connected to the guide cylinder and is disposed in both the sliding groove and the opening; Wherein, the piezoelectric vibrator is a ring-shaped piezoelectric vibrator.

2. The annular rotary linear drive motor according to claim 1, wherein: The guide member is a ball, and a guide groove is provided on the side of the guide cylinder facing the rotating carrier. The ball is arranged in both the slide groove and the guide groove, and the ball is arranged in the opening; Alternatively, the guide member is a slider, the slider is fixedly connected to the side of the guide cylinder facing the rotating carrier, and the slider passes through the opening and is arranged in the sliding groove.

3. The annular rotary linear drive motor according to claim 1, wherein: The base also includes a first annular plate and a connecting plate. The connecting plate is arranged between the first annular plate and the second annular plate and is fixedly connected to the first annular plate and the second annular plate. An annular groove is formed between the first annular plate and the second annular plate. The piezoelectric vibrator and the rotating carrier are sequentially arranged in the annular groove.

4. The annular rotary linear drive motor according to claim 1, wherein: The piezoelectric vibrator includes an elastomer, a piezoelectric element and an electrical connector. The elastomer is fixedly connected to the piezoelectric element, and the piezoelectric element is electrically connected to the electrical connector. An electrical signal with a phase difference is applied to different polarization regions of the piezoelectric element, so that the piezoelectric element generates a vibration mode.

5. The annular rotary linear drive motor according to claim 4, wherein: The elastic body includes an elastic base and a plurality of elastic bosses, wherein the plurality of elastic bosses are arranged at equal intervals on the outer side surface of the elastic base, and the piezoelectric element is arranged on the elastic base.

6. The annular rotary linear drive motor according to claim 3, wherein: Also includes: The cover plate is buckled on the base, and a frustum is provided on the side of the second annular plate facing away from the connecting plate, and the cover plate is clamped with the frustum.

7. The annular rotary linear drive motor according to claim 6, wherein: A ball groove is provided on the outer wall surface of the rotating carrier. Balls are provided in the ball groove. The balls abut against the inner wall surface of the cover plate.

8. The annular rotary linear drive motor according to claim 3, wherein: Also includes: A corrugated spring piece is provided between the piezoelectric vibrator and the connecting plate.

9. The annular rotary linear drive motor according to claim 1, wherein: Also includes: A friction plate is provided between the piezoelectric vibrator and the rotating carrier.

10. The annular rotary linear drive motor according to claim 1, wherein: Also includes: The detection component includes a magnet and a sensor. The magnet is arranged on the side of the rotating carrier, and the sensor is fixed on the base and is arranged corresponding to the magnet.

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