Telescopic lens and electronic device

Abstract

Provided in the present invention are a telescopic lens and an electronic device. The telescopic lens comprises a base, a stator assembly, a rotor assembly, a lifting member, a protective lens assembly and a lens assembly; the rotor assembly comprises an annular rotor rotatably connected to the base, and an annular connecting frame fixed to the annular rotor and accommodated in the annular rotor; the inner wall of the annular connecting frame is provided with a track groove, the track groove being obliquely arranged relative to the circumferential direction of the annular connecting frame; the lifting member is accommodated in the annular connecting frame; and the lifting member is at least partially slidably assembled in the track groove. In the present invention, the stator assembly, the annular rotor, the annular connecting frame and the lifting member cooperate with each other, such that a gear set can be directly omitted, thereby avoiding transmission loss in multi-stage gears, achieving high transmission efficiency, lower power consumption and lower noise, greatly reducing the quantity of parts, making assembly simple, and remarkably reducing the manufacturing cost. Moreover, direct drive by the stator assembly and the rotor assembly can reduce backlash errors caused by cumulative gear transmission clearances, achieving higher transmission accuracy.

Description

A telescopic lens and electronic device Technical Field

[0001] This invention belongs to the field of electronic equipment technology, and particularly relates to a telescopic lens and electronic equipment. Background Technology

[0002] To improve image quality, electronic devices (such as mobile phones) are placing increasingly higher demands on their lenses. For example, they are using zoom lenses to achieve zoom capabilities. Compared to zoom lenses in traditional SLR cameras, incorporating zoom lenses into electronic devices requires them to be thinner and lighter.

[0003] In related technologies, telescopic lenses typically employ miniature stepper motors, gear sets, and lead screw structures to amplify torque and drive direction, thus completing the lens's extension and retraction. Because this telescopic method uses multi-stage gear transmission, significant losses result in low transmission efficiency; furthermore, the large number of required components leads to complex assembly and high manufacturing costs.

[0004] Therefore, it is necessary to provide a new telescopic lens and electronic device to solve the technical problems existing in the related technologies. Technical issues

[0005] The purpose of this invention is to provide a telescopic lens and an electronic device that can solve the technical problems of low transmission efficiency, complex assembly, and high manufacturing cost of telescopic structures used in telescopic lenses on electronic devices in related technologies. Technical solutions

[0006] The technical solution of the present invention is as follows:

[0007] A telescopic lens includes a base, a stator assembly fixed to the base, a rotor assembly rotatably connected to the base and housed within the stator assembly, a lifting member connected to the rotor assembly, a protective lens assembly slidably mounted to the base and connected to the lifting member, and a lens assembly connected to the base, the protective lens assembly, or the lifting member. The rotor assembly includes an annular rotor rotatably connected to the base and an annular connecting frame fixed to the annular rotor and housed within the annular rotor. The inner wall of the annular connecting frame is provided with a track groove, which is inclined relative to the circumferential direction of the annular connecting frame. The lifting member is housed within the annular connecting frame, and at least partially slidably mounted within the track groove.

[0008] Optionally, the lifting component includes an annular lifting part connected to the protective mirror assembly, and a protrusion fixed to the annular lifting part and slidably assembled in the track groove, the protrusion being located on the outer periphery of the annular lifting part.

[0009] Optionally, when the lens assembly is connected to the lifting member, the lens assembly is fixed to the annular lifting part and housed within the annular lifting part.

[0010] Optionally, the protective lens assembly includes a mounting base that is slidably mounted on the base and has its two ends connected to form a first receiving cavity, and a protective lens that is fixed to one end of the mounting base and covers the first receiving cavity. The lifting member is received in the first receiving cavity and connected to the mounting base. The mounting base has a first clearance groove that extends in its sliding direction. The lifting member passes through the first clearance groove at least partially and is slidably mounted in the track groove.

[0011] Optionally, the mounting base includes a first sleeve slidably mounted on the base and having the first receiving cavity, an annular base plate fixed to one end of the first sleeve away from the protective lens, and an annular top plate fixed to the other end of the first sleeve. The lifting member is disposed between the annular base plate and the annular top plate, and the lifting member is elastically connected to the annular top plate. Wherein, when the protective lens assembly is not subjected to downward pressure, the lifting member always abuts against the annular base plate under the action of elastic force.

[0012] Optionally, the telescopic lens further includes a buffer assembly housed within the first receiving cavity. The buffer assembly includes a guide member whose two ends are respectively fixed to the annular base plate and the annular top plate and whose length extends along the sliding direction of the mounting base, and an elastic member whose two ends are respectively connected to the lifting member and the annular top plate. The guide member passes through the lifting member and is slidably assembled with the lifting member.

[0013] Optionally, when the lens assembly is connected to the protective lens assembly, the lens assembly is fixed to the mounting base and housed within the first receiving cavity.

[0014] Optionally, the base includes a base and a second sleeve fixed to the base and having a second receiving cavity. The second sleeve is disposed within the annular connecting frame. The mounting seat is slidably assembled within the second receiving cavity. The second sleeve has a second clearance groove that is at least partially opposite to the first clearance groove. At least a portion of the lifting member passes through the first clearance groove and the second clearance groove in sequence and is slidably assembled within the track groove.

[0015] Optionally, the annular rotor includes a magnetic ring fixed and sleeved on the outer periphery of the annular connecting frame, the magnetic ring being multi-stage radially magnetized; or, the annular rotor includes multiple magnets fixed to the outer periphery of the annular connecting frame, the outer periphery of the annular connecting frame being fixed with multiple protruding partitions, a positioning groove being formed between two adjacent protruding partitions, and the multiple magnets being fixed one-to-one in the multiple positioning grooves.

[0016] Optionally, the stator assembly includes a first annular stator fixed to the base and a second annular stator fixed to the side of the first annular stator away from the base. Both the first annular stator and the second annular stator are sleeved on the outside of the annular rotor and spaced apart from the annular rotor.

[0017] The first annular stator includes a first magnetic yoke ring fixed to the base, a second magnetic yoke ring fixed to the side of the first magnetic yoke ring away from the base and forming a first annular mounting groove with the first magnetic yoke ring, a first annular frame fixed to the first magnetic yoke ring and housed in the first annular mounting groove, and a first coil sleeved on the outside of the first annular frame. The first magnetic yoke ring and the second magnetic yoke ring are respectively provided with a plurality of first claw teeth and a plurality of second claw teeth distributed circumferentially at intervals on the inner side near the annular rotor. The first claw teeth and the second claw teeth are staggered and extend towards each other in length.

[0018] The second annular stator includes a third magnetic yoke ring fixed to the side of the first magnetic yoke ring away from the base, a fourth magnetic yoke ring fixed to the second magnetic yoke ring and forming a second annular mounting groove with the third magnetic yoke ring, a second annular frame fixed to the fourth magnetic yoke ring and housed in the second annular mounting groove, and a second coil sleeved on the outside of the second annular frame. The third magnetic yoke ring and the fourth magnetic yoke ring are respectively provided with a plurality of third claw teeth and a plurality of fourth claw teeth distributed circumferentially at intervals on the inner side near the annular rotor. The third claw teeth and the fourth claw teeth are staggered and extend towards each other in length.

[0019] Optionally, the telescopic lens further includes an annular protective shell fixed to one end of the third magnetic yoke away from the base, and an annular seal fixed to the annular protective shell and in sealing contact with the protective lens assembly.

[0020] The present invention also provides an electronic device including a telescopic lens as described in any of the above. Beneficial effects

[0021] The beneficial effects of this invention are as follows: the stator assembly drives the annular rotor to rotate, and the annular connecting frame rotates under the drive of the annular rotor. Since the lifting component is at least partially slidably assembled in the track groove, and the track groove is inclined relative to the circumferential direction of the annular connecting frame, the annular connecting frame can drive the lifting component up and down or up and down. The protective lens assembly slides up and down under the drive of the lifting component, thereby realizing the extension or retraction of the protective lens assembly. At the same time, after the protective lens assembly extends or before it retracts, the lens assembly 30 can automatically extend or retract, or the lens assembly can move with the lifting component or the protective lens assembly, thereby achieving the purpose of optical zoom. Thus, through the mutual cooperation between the stator assembly, the annular rotor, the annular connecting frame, and the lifting component in this solution, the gear set can be directly eliminated, avoiding multi-stage gear transmission losses, resulting in high transmission efficiency, lower power consumption, lower noise, significantly reduced number of parts, simpler assembly, and significantly reduced manufacturing costs. Moreover, since the stator assembly and rotor assembly are directly driven, the backlash error caused by the accumulation of gear transmission clearance can be reduced, resulting in higher transmission accuracy. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the structure of the electronic device provided by the present invention;

[0023] Figure 2 is a schematic diagram of the telescopic lens provided by the present invention;

[0024] Figure 3 is a cross-sectional view along line AA when the telescopic lens in Figure 2 is in the retracted state.

[0025] Figure 4 is a cross-sectional view along line AA when the telescopic lens in Figure 2 is in the extended state.

[0026] Figure 5 is a cross-sectional view along line AA of the protective lens assembly of the telescopic lens in Figure 2 when downward pressure is applied.

[0027] Figure 6 is an exploded view of the telescopic lens provided by the present invention;

[0028] Figure 7 is a schematic diagram of the assembly between the stator assembly, rotor assembly and lifting component in the telescopic lens provided by the present invention.

[0029] Figure 8 is a schematic diagram of the structure of the rotor assembly provided by the present invention when the annular rotor is a magnetic ring;

[0030] Figure 9 is a schematic diagram of the structure of the rotor assembly provided by the present invention when the annular rotor consists of multiple magnets;

[0031] Figure 10 is an enlarged view of detail B in Figure 9;

[0032] Figure 11 is a cross-sectional view of the lifting component and lens assembly provided by the present invention during assembly;

[0033] Figure 12 is a cross-sectional view of the protective mirror assembly and lens assembly provided by the present invention during assembly;

[0034] Figure 13 is a cross-sectional view of the base and lens assembly provided by the present invention during assembly;

[0035] Figure 14 is a schematic diagram of the stator assembly provided by the present invention;

[0036] Figure 15 is a cross-sectional view along the CC direction in Figure 14. Embodiments of the present invention

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0038] Please refer to Figure 1. An embodiment of the present invention provides an electronic device, including a device body 20 and a telescopic lens 10 assembled in the device body 20. The electronic device can be a mobile phone or the like, and the telescopic lens 10 is the rear lens of the mobile phone. The telescopic lens 10 can achieve optical zoom through telescopic movement, thereby enabling the mobile phone to have a shooting effect similar to that of an SLR camera.

[0039] Please refer to Figures 2 to 15. The telescopic lens 10 includes a base 1, a stator assembly 2 fixed to the base 1, a rotor assembly 3 rotatably connected to the base 1 and housed within the stator assembly 2, a lifting member 4 connected to the rotor assembly 3, a protective lens assembly 5 slidably mounted on the base 1 and connected to the lifting member 4, and a lens assembly 30 connected to the base 1, the protective lens assembly 5, or the lifting member 4. The rotor assembly 3 includes an annular rotor 31 rotatably connected to the base 1 and an annular connecting frame 32 fixed to and housed within the annular rotor 31. The inner wall of the annular connecting frame 32 is provided with a track groove 321, which is inclined relative to the circumferential direction of the annular connecting frame 32. The lifting member 4 is housed within the annular connecting frame 32, and at least partially slidably mounted within the track groove 321.

[0040] The stator assembly 2 drives the annular rotor 31 to rotate, and the annular connecting frame 32 rotates under the drive of the annular rotor 31. Since the lifting component 4 is at least partially slidably assembled in the track groove 321, and the track groove 321 is inclined relative to the circumferential direction of the annular connecting frame 32, the annular connecting frame 32 can drive the lifting component 4 to move up and down or up and down. The protective lens assembly 5 slides up and down under the drive of the lifting component 4, thereby realizing the extension or retraction of the protective lens assembly 5. At the same time, after the protective lens assembly 5 extends or before it retracts, the lens assembly 30 can automatically extend or retract, or the lens assembly 30 can move with the lifting component 4 or the protective lens assembly 5, thereby achieving the purpose of optical zoom. Therefore, through the mutual cooperation between the stator assembly 2, the annular rotor 31, the annular connecting frame 32 and the lifting component 4 in this solution, the gear set can be directly eliminated, avoiding the loss of multi-stage gear transmission, resulting in high transmission efficiency, lower power consumption, lower noise, a significant reduction in the number of parts, simpler assembly, and a significant reduction in manufacturing costs. Moreover, since the stator assembly 2 and rotor assembly 3 are directly driven, the backlash error caused by the accumulation of gear transmission clearance can be reduced, resulting in higher transmission accuracy.

[0041] It should be noted that the track groove 321 can be set at an angle upward or downward. For example, when the track groove 321 is set at an angle upward, the stator assembly 2 drives the annular rotor 31 to rotate clockwise, and the annular connecting frame 32 drives the lifting component 4 to descend; when the stator assembly 2 drives the annular rotor 31 to rotate counterclockwise, the annular connecting frame 32 drives the lifting component 4 to rise.

[0042] Please refer to Figures 2, 3, and 7. The lifting component 4 includes an annular lifting part 41 connected to the protective mirror assembly 5, and a protrusion 42 fixed to the annular lifting part 41 and slidably fitted within the track groove 321. The protrusion 42 is located on the outer periphery of the annular lifting part 41. When the annular connecting frame 32 rotates, the protrusion 42 rises or falls under the drive of the annular connecting frame 32, and the annular lifting part 41 rises or falls along with the protrusion 42. Simultaneously, the protective mirror assembly 5 rises or falls under the drive of the annular lifting part 41, thereby extending or retracting the protective mirror assembly 5. The protrusion 42 is adapted to the track groove 321, and the protrusion 42 is cylindrical, which facilitates the sliding of the protrusion 42 within the track groove 321. The annular connecting frame 32 has a bottom end and a top end that are spaced apart in the sliding direction of the protective mirror assembly 5. One end of the track groove 321 extends to form an opening at the bottom end of the annular connecting frame 32 near the base 11, so as to facilitate the assembly of the protrusion 42 of the lifting member 4 into the track groove 321; the other end extends between the bottom end and the top end of the annular connecting frame 32 to prevent the protrusion 42 from sliding out of the track groove 321.

[0043] Depending on actual needs, the protrusion 42 can be integrated with the annular lifting part 41 or set separately. Multiple track grooves 321 can be provided on the annular connecting frame 32. These track grooves 321 are centrally symmetrically designed, and when there are three or more track grooves 321, each track groove 321 is evenly distributed at an angle. Multiple protrusions 42 can be provided on the outer periphery of the annular lifting part 41. These protrusions 42 are slidably fitted into the multiple track grooves 321. For example, in a specific example, the annular connecting frame 32 has three evenly distributed and spaced track grooves 321, and the outer periphery of the annular lifting part 41 has three evenly distributed and spaced protrusions 42. These three protrusions 42 are slidably fitted into the three track grooves 321, ensuring the stability and smoothness of the annular connecting frame 32 driving the lifting part 4 to rise or fall.

[0044] Please refer to Figure 11. In some embodiments, the lens assembly 30 is connected to the lifting member 4. The lens assembly 30 includes a lens, is fixed to and housed within the annular lifting part 41, and is driven to rise or fall by the annular lifting part 41.

[0045] Please refer to Figures 3 to 6. The protective mirror assembly 5 includes a mounting base 51 that is slidably mounted on the base 1 and whose two ends are connected to form a first receiving cavity 5111, and a protective lens 52 that is fixed to one end of the mounting base 51 and covers the first receiving cavity 5111. A lifting member 4 is received in the first receiving cavity 5111 and connected to the mounting base 51. The lifting member 4 drives the mounting base 51 to rise or fall, thereby realizing the extension or retraction of the protective mirror assembly 5. The mounting base 51 is provided with a first clearance groove 5112 whose length extends along its sliding direction. The lifting member 4 passes through the first clearance groove 5112 at least partially and is slidably mounted in the track groove 321. The protrusion 42 passes through the first clearance groove 5112. The length of the first clearance groove 5112 is greater than the maximum distance that the lifting member 4 can rise or fall, so that the mounting base 51 will not interfere with the sliding of the protrusion 42.

[0046] It should be noted that the lens assembly 30 is housed in the first receiving cavity 5111, and the protective lens 52 is used to protect the lens assembly 30. The lens assembly 30 can extend or retract together with the protective lens assembly 5, or it can extend after the protective lens assembly 5 extends, or retract before the protective lens assembly 5 retracts.

[0047] Please refer to Figures 3, 4 and 6. The mounting base 51 includes a first sleeve 511 that is slidably mounted on the base 1 and has a first receiving cavity 5111, an annular bottom plate 512 fixed to one end of the first sleeve 511 away from the protective lens 52, and an annular top plate 513 fixed to the other end of the first sleeve 511. The annular top plate 513 may be formed by extending a certain distance radially inward from the top of the first sleeve 511. The protective lens 52 is fixed to one end of the annular top plate 513 away from the annular bottom plate 512. The lifting member 4 is disposed between the annular bottom plate 512 and the annular top plate 513, and the lifting member 4 is elastically connected to the annular top plate 513. When the protective mirror assembly 5 is not subjected to downward pressure, the lifting component 4 is always in contact with the annular base plate 512 under the action of elasticity. At this time, the lifting component 4 and the mounting base 51 are tightly fitted together, so that the lifting component 4 and the mounting base 51 can be regarded as a whole, ensuring that the lifting component 4 and the mounting base 51 rise or fall synchronously.

[0048] Please refer to Figures 3 to 6. The telescopic lens 10 also includes an image receiving component 9 fixed to the base 1. The image receiving component 9 is arranged opposite to the lens assembly 30. When the protective lens assembly 5 is extended, the lens assembly 30 moves away from the image receiving component 9, changing the distance between the lens assembly 30 and the image receiving component 9, thereby achieving optical zoom.

[0049] Referring to Figures 3, 5, and 6, the telescopic lens 10 also includes a buffer assembly 6 housed within the first receiving cavity 5111. The buffer assembly 6 buffers the movement of the mounting base 51 under downward pressure. The buffer assembly 6 includes a guide member 61 with both ends fixed to the annular base plate 512 and the annular top plate 513, respectively, and extending along the sliding direction of the mounting base 51; and an elastic member 62 with both ends connected to the lifting member 4 and the annular top plate 513, respectively. The guide member 61 passes through the lifting member 4 and is slidably assembled with it. When the protective lens assembly 5 is in the extended state and is pressed down, the mounting base 51 moves downward and compresses the elastic member 62. At this time, the elastic member 62 is further compressed to keep the position of the lifting member 4 stationary, preventing stress from being directly transmitted to the protrusion 42 of the lifting member 4 and the annular connecting frame 32, thereby protecting the mechanism.

[0050] It should be understood that the elastic element 62 is always in a compressed state, so that when the protective mirror assembly 5 is not subjected to downward pressure, the lifting element 4 is always in contact with the annular base plate 512 under the action of the rebound force provided by the elastic element 62.

[0051] Depending on actual needs, the guide member 61 can be a guide rod, and the elastic member 62 can be a spring. The elastic member 62 can be sleeved on the outer periphery of the guide member 61. The number of guide members 61 and elastic members 62 is the same as the number of protrusions 42. For example, there are three guide members 61, three elastic members 62 and three protrusions 42.

[0052] Referring to Figure 12, in some embodiments, the lens assembly 30 is connected to the protective lens assembly 5. The lens assembly 30 includes a lens, is fixed to the mounting base 51 and housed within the first receiving cavity 5111, and is driven to rise or fall by the mounting base 51. Depending on actual needs, the lens assembly 30 can be fixed to the first sleeve 511, the annular base plate 512, or the annular top plate 513.

[0053] Please refer to Figures 3 to 6. The base 1 includes a base 11 and a second sleeve 12 fixed to the base 11 and having a second receiving cavity 121. The base 11 and the second sleeve 12 can be an integral structure. The second sleeve 12 is disposed within the annular connecting frame 32, and there is a gap between the second sleeve 12 and the annular connecting frame 32 to ensure smooth rotation of the annular connecting frame 32. The mounting seat 51 is slidably assembled within the second receiving cavity 121, that is, the mounting seat 51 can slide relative to the base 1 to an extended state or a retracted state. The second sleeve 12 is provided with a second clearance groove 122 that is at least partially opposite to the first clearance groove 5112. The second clearance groove 122 can prevent the base 1 from interfering with the sliding of the lifting member 4. At least part of the lifting member 4 passes through the first clearance groove 5112 and the second clearance groove 122 in sequence and is slidably assembled in the track groove 321. The protrusion 42 of the lifting member 4 passes through the first clearance groove 5112 and the second clearance groove 122 in sequence.

[0054] Please refer to Figure 13. In some embodiments, the lens assembly 30 is connected to the base 1. The lens assembly 30 includes a lens and a VCM (Voice Coil Motor). The VCM is fixed to the base 1 via the image receiving assembly 9. The lifting and lowering of the protective lens assembly 5 can provide space for the movement of the lens. For example, after the protective lens 52 is extended, the VCM drives the lens to move upward and extend; before the protective lens 52 is retracted, the VCM drives the lens to move downward and retract.

[0055] Please refer to Figure 8. In some embodiments, the annular rotor 31 includes a magnetic ring 311 fixed and sleeved on the outer periphery of the annular connecting frame 32. The magnetic ring 311 is multi-stage radially magnetized, which is beneficial for outputting reluctance torque. The magnetic ring 311 can be prepared by hot pressing, sintering and other molding technologies, resulting in higher remanent magnetic properties.

[0056] Please refer to Figures 9 and 10. In some embodiments, the annular rotor 31 includes a plurality of magnets 312 fixed to the outer periphery of the annular connecting frame 32. A plurality of raised partitions 323 are fixed to the outer periphery of the annular connecting frame 32. A positioning groove 322 is formed between two adjacent raised partitions 323. The plurality of magnets 312 are fixed one-to-one in the plurality of positioning grooves 322. That is, the annular rotor 31 is spliced ​​together from a plurality of magnets 312. The magnetic poles of the plurality of magnets 312 are arranged alternately. The magnets 312 can be fixed to the annular connecting frame 32 by adhesive bonding, thereby reducing the processing difficulty of the magnets 312, reducing the manufacturing cost of the annular rotor 31, and reducing the non-magnetic area at the edge.

[0057] It should be noted that the annular connecting frame 32 can be made of a magnetically conductive material, which can enhance the magnetic properties of the rotor assembly 3 and increase the driving force of the rotor assembly 3. The annular connecting frame 32 can be rotatably mounted on the base 1 via bearings, or transmission rails 33 can be respectively provided on the outer periphery of both ends of the annular connecting frame 32. The transmission rails 33 are equipped with balls, which contact the base 1, so that the annular connecting frame 32 can be rotatably mounted on the base 1.

[0058] Please refer to Figures 7 and 14. The stator assembly 2 includes a first annular stator 21 fixed to the base 1 and a second annular stator 22 fixed to the side of the first annular stator 21 away from the base 1. The first annular stator 21 and the second annular stator 22 are both sleeved on the outside of the annular rotor 31 and spaced apart from the annular rotor 31. The first annular stator 21 and the second annular stator 22 are respectively located at the two magnetic ends of the magnetic ring 311 or the magnet 312.

[0059] Please refer to Figures 14 and 15. The first annular stator 21 includes a first magnetic yoke ring 211 fixed to the base 1, a second magnetic yoke ring 212 fixed to the side of the first magnetic yoke ring 211 away from the base 1 and forming a first annular mounting groove 2112 with the first magnetic yoke ring 211, a first annular frame 213 fixed to the first magnetic yoke ring 211 and housed in the first annular mounting groove 2112, and a first coil 214 sleeved on the outside of the first annular frame 213. The first magnetic yoke ring 211 and the second magnetic yoke ring 212 are respectively provided with a plurality of first claw teeth 2111 and a plurality of second claw teeth 2121 distributed circumferentially at intervals on the inner side of the annular rotor 31. The first claw teeth 2111 and the second claw teeth 2121 are staggered and extend towards each other in length. When the first coil 214 is energized, it will generate excitation on the first claw teeth 2111 and the second claw teeth 2121. The second annular stator 22 includes a third magnetic yoke ring 221 fixed to the side of the first magnetic yoke ring 211 away from the base 1, a fourth magnetic yoke ring 222 fixed to the second magnetic yoke ring 212 and forming a second annular mounting groove 2212 with the third magnetic yoke ring 221, a second annular frame 223 fixed to the fourth magnetic yoke ring 222 and housed in the second annular mounting groove 2212, and a second coil 224 sleeved on the outside of the second annular frame 223. The third magnetic yoke ring 221 and the fourth magnetic yoke ring 222 are respectively provided with a plurality of third claw teeth 2211 and a plurality of fourth claw teeth 2221 distributed circumferentially at intervals on the inner side of the annular rotor 31. The third claw teeth 2211 and the fourth claw teeth 2221 are staggered and extend towards each other. When the second coil 224 is energized, it will generate excitation on the third claw teeth 2211 and the fourth claw teeth 2221.

[0060] According to actual needs, the first magnetic yoke ring 211, the second magnetic yoke ring 212, the third magnetic yoke ring 221 and the fourth magnetic yoke ring 222 are all made of magnetically conductive material. The first claw tooth 2111, the second claw tooth 2121, the third claw tooth 2211 and the fourth claw tooth 2221 can be processed by stamping, MIM metal injection molding, CNC and other methods on the magnetic yoke ring. The number of claw tooth pairs is the same as the number of pole pairs of the magnetic ring 311 or the magnet 312. For example, in one embodiment, the number of claw tooth pairs can be 30 pairs.

[0061] It should be understood that, compared to a stepper motor and gearbox stacking configuration, the motor composed of stator assembly 2 and rotor assembly 3 can achieve a smaller shoulder height and lighter weight, allowing for a higher extension height of the protective lens assembly 5 within the same size. Real-time speed adjustment and optimized lifting performance can be achieved by adjusting the motor drive frequency (e.g., high-frequency drive for automatic retraction during a fall). Furthermore, the annular shape of both stator assembly 2 and rotor assembly 3 gives the telescopic lens 10 a regular circular appearance, resulting in a more aesthetically pleasing design and easier overall stacking.

[0062] Please refer to Figures 3 to 6. The telescopic lens 10 also includes an annular protective shell 7 fixed to the end of the third magnetic yoke ring 221 away from the base 1, and an annular sealing member 8 fixed to the annular protective shell 7 and in sealing contact with the protective lens assembly 5. The annular protective shell 7 can decorate the telescopic lens 10, and the annular sealing member 8 can be a sealing ring. The annular sealing member 8 is in sealing contact with the outer peripheral surface of the mounting base 51, so that the annular sealing member 8 is waterproof, thereby ensuring the sealing performance of the telescopic lens 10.

[0063] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A telescopic lens, comprising a base, a stator assembly fixed to the base, a rotor assembly rotatably connected to the base and housed within the stator assembly, a lifting member connected to the rotor assembly, a protective lens assembly slidably mounted to the base and connected to the lifting member, and a lens assembly connected to the base, the protective lens assembly, or the lifting member, characterized in that, The rotor assembly includes an annular rotor rotatably connected to the base and an annular connecting frame fixed to and housed within the annular rotor. The inner wall of the annular connecting frame is provided with a track groove, which is inclined relative to the circumferential direction of the annular connecting frame. The lifting member is housed within the annular connecting frame and is at least partially slidably assembled within the track groove.

2. The telescopic lens according to claim 1, characterized in that, The lifting component includes an annular lifting part connected to the protective mirror assembly, and a protrusion fixed to the annular lifting part and slidably assembled in the track groove, the protrusion being located on the outer periphery of the annular lifting part.

3. The telescopic lens according to claim 2, characterized in that, When the lens assembly is connected to the lifting member, the lens assembly is fixed to the annular lifting part and housed within the annular lifting part.

4. The telescopic lens according to claim 1, characterized in that, The protective mirror assembly includes a mounting base that is slidably mounted on the base and has its two ends connected to form a first receiving cavity, and a protective lens that is fixed to one end of the mounting base and covers the first receiving cavity. The lifting member is housed in the first receiving cavity and connected to the mounting base. The mounting base has a first clearance groove that extends in its sliding direction. The lifting member passes through the first clearance groove at least partially and is slidably mounted in the track groove.

5. The telescopic lens according to claim 4, characterized in that, The mounting base includes a first sleeve slidably mounted on the base and having the first receiving cavity, an annular base plate fixed to one end of the first sleeve away from the protective lens, and an annular top plate fixed to the other end of the first sleeve. The lifting member is disposed between the annular base plate and the annular top plate, and the lifting member is elastically connected to the annular top plate. When the protective lens assembly is not subjected to downward pressure, the lifting member always abuts against the annular base plate under the action of elastic force.

6. The telescopic lens according to claim 5, characterized in that, The telescopic lens further includes a buffer assembly housed within the first accommodating cavity. The buffer assembly includes a guide member whose two ends are respectively fixed to the annular base plate and the annular top plate and whose length extends along the sliding direction of the mounting base, and an elastic member whose two ends are respectively connected to the lifting member and the annular top plate. The guide member passes through the lifting member and is slidably assembled with the lifting member.

7. The telescopic lens according to claim 4, characterized in that, When the lens assembly is connected to the protective lens assembly, the lens assembly is fixed to the mounting base and housed within the first receiving cavity.

8. The telescopic lens according to claim 4, characterized in that, The base includes a base and a second sleeve fixed to the base and having a second receiving cavity. The second sleeve is disposed in the annular connecting frame. The mounting seat is slidably assembled in the second receiving cavity. The second sleeve has a second clearance groove that is at least partially opposite to the first clearance groove. At least a portion of the lifting member passes through the first clearance groove and the second clearance groove in sequence and is slidably assembled in the track groove.

9. The telescopic lens according to claim 1, characterized in that, The annular rotor includes a magnetic ring fixed and sleeved on the outer periphery of the annular connecting frame, the magnetic ring being radially magnetized in multiple stages; or, the annular rotor includes multiple magnets fixed to the outer periphery of the annular connecting frame, the outer periphery of the annular connecting frame being fixed with multiple raised partitions, a positioning groove being formed between two adjacent raised partitions, and the multiple magnets being fixed one-to-one in the multiple positioning grooves.

10. The telescopic lens according to claim 1, characterized in that, The stator assembly includes a first annular stator fixed to the base and a second annular stator fixed to the side of the first annular stator away from the base. Both the first annular stator and the second annular stator are sleeved on the outside of the annular rotor and spaced apart from the annular rotor. The first annular stator includes a first magnetic yoke ring fixed to the base, a second magnetic yoke ring fixed to the side of the first magnetic yoke ring away from the base and forming a first annular mounting groove with the first magnetic yoke ring, a first annular frame fixed to the first magnetic yoke ring and housed in the first annular mounting groove, and a first coil sleeved on the outside of the first annular frame. The first magnetic yoke ring and the second magnetic yoke ring are respectively provided with a plurality of first claw teeth and a plurality of second claw teeth distributed circumferentially at intervals on the inner side near the annular rotor. The first claw teeth and the second claw teeth are staggered and extend towards each other in length. The second annular stator includes a third magnetic yoke ring fixed to the side of the first magnetic yoke ring away from the base, a fourth magnetic yoke ring fixed to the second magnetic yoke ring and forming a second annular mounting groove with the third magnetic yoke ring, a second annular frame fixed to the fourth magnetic yoke ring and housed in the second annular mounting groove, and a second coil sleeved on the outside of the second annular frame. The third magnetic yoke ring and the fourth magnetic yoke ring are respectively provided with a plurality of third claw teeth and a plurality of fourth claw teeth distributed circumferentially at intervals on the inner side near the annular rotor. The third claw teeth and the fourth claw teeth are staggered and extend towards each other in length.

11. The telescopic lens according to claim 10, characterized in that, The telescopic lens also includes an annular protective shell fixed to one end of the third magnetic yoke away from the base, and an annular sealing element fixed to the annular protective shell and in sealing contact with the protective lens assembly.

12. An electronic device, characterized in that, Includes the telescopic lens as described in any one of claims 1-11.

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