Telescopic lens and electronic device

Abstract

The invention provides a telescopic lens and electronic equipment. The telescopic lens comprises a base, a stator assembly, a rotor assembly, a lifting part, a protective lens assembly and a lens assembly, the stator assembly comprises an annular stator ring fixed on the base, a plurality of wrapping posts protruding and extending from the inner circumferential side of the stator ring to the direction close to the lens assembly, and a plurality of windings respectively sleeved and fixed on the plurality of wrapping posts; the plurality of wrapping posts and the rotor assembly are mutually spaced; the rotor assembly comprises an annular rotor and an annular connecting frame, the inner wall of the annular connecting frame is provided with a rail groove, the rail groove is obliquely arranged relative to the circumferential direction of the annular connecting frame, the lifting part is contained in the annular connecting frame, and at least part of the lifting part is assembled in the rail groove in a sliding mode; after being electrified, the winding and the annular rotor are used for driving the lifting piece to ascend and descend along the rail groove. Compared with the prior art, the telescopic lens is small in size occupation, high in transmission efficiency, small in return stroke error, resistant to falling, simple in structure and manufacturing process and high in stability.

Description

[Technical field]

[0001] The present invention relates to the technical field of electronic equipment, and in particular to a telescopic lens and electronic equipment. [Background technology]

[0002] In order to improve the quality of photographing, electronic devices (such as mobile phones, etc.) have increasingly higher requirements for lenses. For example, a telescopic lens is used on electronic devices to achieve zooming. Compared with the telescopic lens on a traditional SLR camera, the telescopic lens on an electronic device needs to meet the requirement that the electronic device is lighter and thinner.

[0003] In the related art, telescopic lenses generally use micro-stepping motors, gear sets, screw structures, etc. to achieve torque amplification and reversing transmission to complete the telescopic movement of the lens. Since this telescopic method uses multi-stage gear transmission, the wheel transmission noise is high, and the return difference is large, resulting in low transmission efficiency; at the same time, there are many gear structures, resulting in a large overall volume and the structure cannot be lightweight; moreover, it requires a large number of parts, resulting in complex assembly of the telescopic lens and high manufacturing costs.

[0004] Therefore, it is necessary to provide a new telescopic lens and electronic equipment to solve the above problems. [Summary of the invention]

[0005] The technical problem to be solved by the present invention is to provide a telescopic lens with small size, high transmission efficiency, small return error, anti-drop, simple structure and process, and high stability.

[0006] To solve the above technical problems, in a first aspect, an embodiment of the present invention provides a telescopic lens, which includes a base, a stator assembly fixed to the base, a rotor assembly rotatably connected to the base and accommodated inside the stator assembly, a lifting member connected to the rotor assembly, a protective mirror assembly slidably assembled on the base and connected to the lifting member, and a lens assembly connected to the base or the protective mirror assembly or the lifting member;

[0007] The stator assembly comprises an annular stator ring fixed to the base, a plurality of winding posts protruding and extending from the inner circumference of the stator ring toward the direction close to the lens assembly, and a plurality of windings respectively sleeved and fixed to the plurality of winding posts; the plurality of winding posts are spaced apart from the rotor assembly;

[0008] The rotor assembly includes a magnetic annular rotor rotatably connected to the base, and an annular connecting frame fixed to the inner circumference of the annular rotor. The inner circumference of the annular connecting frame is provided with a track groove, and the track groove is inclined 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. When the winding is energized, it generates a mutual magnetic field with the annular rotor and drives the annular rotor to rotate, so as to drive the lifting member to move up and down along the track groove.

[0009] Preferably, the plurality of winding poles are arranged in a circular array.

[0010] Preferably, the stator ring is an integrally formed structure of silicon steel material or is formed by stacking a plurality of silicon steel sheets.

[0011] Preferably, the lifting member includes an annular lifting portion connected to the protective mirror assembly, and at least two protrusions fixed to the annular lifting portion and slidably assembled in the track groove, and the protrusions are respectively arranged on the outer peripheral side of the annular lifting portion.

[0012] Preferably, the protective lens assembly includes a mounting seat slidably assembled on the base and connected at both ends to form a first accommodating cavity, and a protective lens fixed to an end of the mounting seat away from the base and covering the first accommodating cavity, the lifting member is accommodated in the first accommodating cavity and the lifting member is connected to the lens assembly, the mounting seat is provided with at least two first clearance grooves extending from an end thereof close to the base along its sliding direction, the protrusion passes through the first clearance groove and is slidably assembled in the track groove.

[0013] Preferably, the mounting seat includes a first sleeve slidably assembled on the base and provided with the first accommodating cavity, an annular bottom 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 arranged between the annular bottom plate and the annular top plate, and the lifting member and the annular top plate are elastically connected through a buffer assembly; wherein, when the protective lens assembly is not subjected to downward pressure, the lifting member always abuts against the annular bottom plate under the action of the elastic force of the buffer assembly.

[0014] Preferably, the base includes an annular base body, a support portion formed by extending from the inner circumference of the base body toward the direction approaching the lens assembly, and a second sleeve formed by bending and extending from the support portion toward the direction approaching the rotor assembly; the second sleeve is provided with a second accommodating cavity, the lens assembly is arranged in the second accommodating cavity at intervals, the second sleeve is arranged in the annular connecting frame and spaced from each other, the second sleeve is provided with at least two second make way grooves respectively arranged opposite to the first make way grooves, each of the protrusions passes through the first make way groove and the second make way groove corresponding thereto in turn, and is slidably assembled in the track groove.

[0015] Preferably, the support portion is provided with a plurality of wire outlet holes penetrating therethrough, and the wires of the winding are led out through the wire outlet holes respectively.

[0016] Preferably, the telescopic lens further comprises a dustproof sheet, which is located at the positions of the plurality of wire outlet holes and is fixedly covered on a side of the support portion away from the stator assembly.

[0017] Preferably, the telescopic lens further comprises an annular protective shell fixed to one end of the base body away from the supporting portion, and an annular sealing member fixed to the annular protective shell and in sealing contact with the protective lens assembly.

[0018] Preferably, the annular rotor is an integrally formed multi-pole radially magnetized annular structure or an annular structure surrounded by a plurality of magnets; wherein the plurality of magnets are arranged along the outer circumference of the annular connecting frame in an alternating manner of N poles and S poles.

[0019] Preferably, the telescopic lens further comprises a position acquisition unit, and the position acquisition unit is used to acquire the rotation parameters of the rotor assembly;

[0020] Wherein, the position acquisition unit includes a permanent magnet and a position sensor, the permanent magnet is embedded in a side of the rotor assembly close to the base, the position sensor is fixed to the base, and the permanent magnet and the position sensor are arranged correspondingly and spaced from each other.

[0021] Preferably, the telescopic lens also includes a buffer assembly accommodated in the first accommodating cavity, the buffer assembly includes a guide member whose two ends are respectively fixed to the annular bottom plate and the annular top plate and arranged along the sliding direction of the mounting seat, 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.

[0022] In a second aspect, an embodiment of the present invention provides an electronic device, comprising the above-mentioned telescopic lens.

[0023] Compared with the related art, in the telescopic lens of the present invention, 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 member 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 member to move up and down or up and down, and the protective mirror assembly slides up and down under the drive of the lifting member, thereby realizing the extension or retraction of the protective mirror assembly; at the same time, after the protective mirror assembly is extended or before it is retracted, the lens assembly can automatically extend or retract, or the lens assembly can follow the movement of the lifting member or the protective mirror assembly, thereby achieving the purpose of optical zoom. Therefore, through the mutual cooperation between the stator assembly, the annular rotor, the annular connecting frame and the lifting member in the present invention, the gear set can be directly omitted, and the multi-stage gear transmission loss is avoided. The transmission efficiency is high, the power consumption is lower, the noise is smaller, the number of parts is greatly simplified, the assembly is simple, and the manufacturing cost is significantly reduced. Moreover, since the stator assembly and the rotor assembly are directly driven, the return error caused by the accumulation of gear transmission clearance can be reduced, and the transmission accuracy is higher. Furthermore, the overall structure has a regular circular appearance, the design is more beautiful, and the whole machine is easier to stack.

Brief Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0025] Figure 1 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention;

[0026] Figure 2 A partial structural exploded view of an electronic device provided by an embodiment of the present invention;

[0027] Figure 3 A partial structural exploded view of a telescopic lens provided by an embodiment of the present invention;

[0028] Figure 4 For along Figure 2 Sectional view along line AA;

[0029] Figure 5 For along Figure 2 Sectional view along the midline BB;

[0030] Figure 6 A schematic structural diagram of a base of a telescopic lens provided in an embodiment of the present invention;

[0031] Figure 7 A schematic structural diagram of a stator assembly of a telescopic lens provided in an embodiment of the present invention. [Specific implementation method]

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-Figure 2 The embodiment of the present invention provides an electronic device 200, including a device body 201 and a telescopic lens 100 assembled in the device body 201. The electronic device 200 may be a mobile phone, etc. The telescopic lens 100 is a rear lens of the mobile phone. The telescopic lens 100 can achieve optical zoom through telescopic movement, so that the mobile phone has a shooting effect similar to that of a single-lens reflex camera.

[0034] See also Figure 2-Figure 7 As shown, the present invention provides a telescopic lens 100, which includes a base 1, a stator assembly 2 fixed to the base 1, a rotor assembly 3 rotatably connected to the base 1 and accommodated inside the stator assembly 2, a lifting member 4 connected to the rotor assembly 3, a protective mirror assembly 5 slidably assembled on the base 1 and connected to the lifting member 4, and a lens assembly 6 connected to the base 1 or the protective mirror assembly 5 or the lifting member 4.

[0035] The stator assembly 2 includes an annular stator ring 21 fixed to the base 1, a plurality of winding posts 22 protruding and extending from the inner circumference of the stator ring 21 toward the direction close to the lens assembly 6, and a plurality of windings 23 respectively mounted and fixed on the plurality of winding posts 22; the plurality of winding posts 22 are spaced apart from the rotor assembly 3.

[0036] The rotor assembly 3 includes a magnetic annular rotor 31 rotatably connected to the base 1, and an annular connecting frame 32 fixed to the inner circumference of the annular rotor 31. The inner circumference of the annular connecting frame 32 is provided with a track groove 33, and the track groove 33 is inclined relative to the circumferential direction of the annular connecting frame 32. The lifting member 4 is accommodated in the annular connecting frame 32, and the lifting member 4 is at least partially slidably assembled in the track groove 33; when the winding 23 is energized, it generates a mutual magnetic field with the annular rotor 31 and drives the annular rotor 31 to rotate, so as to drive the lifting member 4 to move up and down along the track groove 33.

[0037] Specifically, after the multiple windings 23 of the stator assembly 2 are energized, the annular rotor 31 is driven to rotate, and the annular connecting frame 32 rotates under the drive of the annular rotor 31. Since the lifting member 4 is at least partially slidably assembled in the track groove 33, and the track groove 33 is inclined relative to the circumferential direction of the annular connecting frame 32, the annular connecting frame 32 can drive the lifting member 4 to move up and down or up and down. The protective mirror assembly 5 slides up and down under the drive of the lifting member 4, thereby realizing the telescopic action of the protective mirror assembly 5; at the same time, before the protective mirror assembly 5 extends or retracts, the lens assembly 6 can automatically extend or retract, or the lens assembly 6 can move with the lifting member 4 or the protective mirror 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 member 4 in the present invention, the gear set can be directly omitted, and the multi-stage gear transmission loss is avoided, the transmission efficiency is high, the power consumption is lower, the noise is smaller, the number of parts is greatly simplified, the assembly is simple, and the manufacturing cost is significantly reduced. Moreover, since the stator assembly 2 and the rotor assembly 3 are directly driven, the return error caused by the accumulation of gear transmission clearance can be reduced, and the transmission accuracy is higher.

[0038] In this embodiment, the track groove 33 can be set obliquely upward or obliquely downward. For example, when the track groove 33 is set obliquely upward, the stator assembly 2 drives the annular rotor 31 to rotate clockwise, and the annular connecting frame 32 drives the lifting member 4 to descend; the stator assembly 2 drives the annular rotor 31 to rotate counterclockwise, and the annular connecting frame 32 drives the lifting member 4 to rise.

[0039] In this embodiment, the plurality of winding posts 22 are arranged in a circular array, so that the windings 23 on the winding posts 22 are evenly distributed, and the magnetic field generated after the windings 23 are energized has good driving stability and sufficient driving power.

[0040] In this embodiment, the stator ring 21 is an integrally formed structure of silicon steel material or is formed by stacking a plurality of silicon steel sheets, and has high structural strength.

[0041] In this embodiment, the lifting member 4 includes an annular lifting portion 41 connected to the protective mirror assembly 5, and at least two protrusions 42 fixed to the annular lifting portion 41 and slidably assembled in the track groove 33, and the protrusions 42 are respectively arranged on the outer peripheral side of the annular lifting portion 41.

[0042] 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 portion 41 rises or falls following the protrusion 42. At the same time, the protective mirror assembly 5 rises or falls under the drive of the annular lifting portion 41, so as to realize the extension or retraction of the protective mirror assembly 5. The protrusion 42 is adapted to the track groove 33, and the protrusion 42 is cylindrical, which is conducive to the sliding of the protrusion 42 in the track groove 33. The annular connecting frame 32 is provided with a bottom end and a top end spaced apart in the sliding direction of the protective mirror assembly 5. One end of the track groove 33 extends to form an opening at the bottom end of the annular connecting frame 32 close to the base, so as to facilitate the assembly of the protrusion 42 of the lifting member 4 in the track groove 33; 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 33.

[0043] According to actual needs, the protrusion 42 can be connected to the annular lifting part 41 as a whole or separately. A plurality of track grooves 33 can be arranged on the annular connecting frame 32, and the plurality of track grooves 33 are designed to be centrally symmetrical, and when the number of track grooves 33 is three or more than three, each track groove 33 is evenly distributed at an angle; a plurality of protrusions 42 can be arranged on the outer peripheral side of the annular lifting part 41, and the plurality of protrusions 42 are slidably assembled in the plurality of track grooves 33 one by one. For example, in a specific example, three track grooves 33 are arranged at intervals and evenly distributed on the annular connecting frame 32, and three protrusions 42 are arranged at intervals and evenly distributed on the outer peripheral side of the annular lifting part 41, and the three protrusions 42 are slidably assembled in the three track grooves 33 one by one, which can ensure the stability and smoothness of the annular connecting frame 32 driving the lifting member 4 to rise or fall.

[0044] In this embodiment, the annular connecting frame 32 can be made of magnetic conductive material, which can improve the magnetic properties of the rotor assembly 3 and the driving force of the rotor assembly 3. The annular connecting frame 32 can be rotatably arranged on the base 1 through a bearing, or transmission tracks 34 can be respectively arranged on the outer circumference of both ends of the annular connecting frame 32, and balls are arranged on the transmission tracks 34, and the balls are in contact with the base 1, so that the annular connecting frame 32 is rotatably arranged on the base 1.

[0045] In some embodiments, the lens assembly 6 is connected to the lifting member 4, wherein the lens assembly 6 includes a lens, the lens assembly 6 is fixed to the annular lifting portion 41 and accommodated in the annular lifting portion 41, and the lens assembly 6 is driven by the annular lifting portion 41 to achieve ascending or descending movement.

[0046] In this embodiment, the protective lens assembly 5 includes a mounting seat 51 which is slidably mounted on the base 1 and whose two ends are connected to form a first accommodating cavity 52, and a protective lens 53 which is fixed to one end of the mounting seat 51 away from the base 1 and covers the first accommodating cavity 52. ​​The lifting member 4 is accommodated in the first accommodating cavity 52 and the lifting member 4 is connected to the lens assembly 6. The mounting seat 51 is provided with at least two first clearance grooves 54 extending from one end thereof close to the base 1 along its sliding direction. The protrusion 42 at least partially passes through the first clearance grooves 54 and is slidably mounted in the track groove 33. The lifting member 4 drives the mounting seat 51 to move up and down, thereby realizing the telescopic action of the protective lens assembly 5. The protrusion 42 passes through the first clearance groove 54, and the length of the first clearance groove 54 is greater than the maximum distance of the lifting member 4 rising or falling, so that the mounting seat 51 will not interfere with the sliding action of the protrusion 42.

[0047] In this embodiment, the mounting seat 51 includes a first sleeve 511 slidably assembled on the base 1 and provided with the first accommodating cavity 52, an annular bottom plate 512 fixed to one end of the first sleeve 511 away from the protective lens 53, and an annular top plate 513 fixed to the other end of the first sleeve 511, the lifting member 4 is arranged between the annular bottom plate 512 and the annular top plate 513, and the lifting member 4 and the annular top plate 513 are elastically connected through the buffer assembly 10; wherein, when the protective lens assembly 5 is not subjected to downward pressure, the lifting member 4 is always in contact with the annular bottom plate 512 under the elastic force of the buffer assembly 10. When the protective lens assembly 5 is not subjected to downward pressure, the lifting member 4 is always in contact with the annular bottom plate 512 under the elastic force, and the lifting member 4 and the mounting seat 51 are closely fitted together, so that the lifting member 4 and the mounting seat 51 can be regarded as a whole, ensuring that the lifting member 4 and the mounting seat 51 rise or fall synchronously.

[0048] In this embodiment, the telescopic lens 100 also includes an image receiving component 30 fixed to the base 1, and the image receiving component 30 is arranged opposite to the lens component 6. When the protective lens component 5 is extended, the lens component 6 moves in a direction away from the image receiving component 30, changing the distance between the lens component 6 and the image receiving component 30, thereby achieving the purpose of optical zoom.

[0049] In this embodiment, the base 1 includes an annular base body 11, a support portion 12 formed by extending the inner circumference of the base body 11 toward the direction close to the lens assembly 6, and a second sleeve 13 formed by bending and extending the support portion 12 toward the direction close to the rotor assembly 3; the second sleeve 13 is provided with a second accommodating cavity 17, the lens assembly 6 is arranged in the second accommodating cavity 17 at intervals, the second sleeve 13 is arranged in the annular connecting frame 32 and is spaced from each other, the second sleeve 13 is provided with at least two second clearance grooves 14 respectively arranged opposite to the first clearance grooves 54, each of the protrusions passes through the first clearance groove 54 and the second clearance groove 14 corresponding thereto in sequence, and is slidably assembled in the track groove 33. Among them, the base body 11, the support portion 12 and the second sleeve 13 can be an integral structure with high structural strength. A gap is provided between the second sleeve 13 and the annular connecting frame 32 to ensure the smooth rotation of the annular connecting frame 32. The second clearance groove 14 corresponds to the first clearance groove 54 so that the base 1 can be prevented from interfering with the sliding of the lifting member 4, and the lifting member 4 can be easily raised or lowered.

[0050] In some embodiments, the lens assembly 6 is connected to the base 1, wherein the lens assembly 6 includes a lens and a VCM (VoiceCoil Motor), and the VCM is fixed to the base 1 through the image receiving assembly 30. 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 53 is extended, the VCM drives the lens to move upward and extend; before the protective lens 53 is retracted, the VCM drives the lens to move downward and retract.

[0051] In this embodiment, the support portion 12 is provided with a plurality of wire outlet holes 15 passing therethrough, and the wires of the winding 23 are led out through the plurality of wire outlet holes 15, respectively, so that the wires of the winding 23 are conveniently connected to an external power source to realize power supply.

[0052] In this embodiment, the telescopic lens 100 further includes a dustproof sheet 16, which is located at the position of the plurality of the outlet holes 15 and is fixed to the side of the support portion 12 away from the stator assembly 2. The outlet position and the dustproof sheet 16 (IR sheet) are both glued to the base 1, and the stator assembly 2 is completely isolated from the photosensitive module at the bottom, thereby avoiding the risk of dust generated by long-term operation. In this embodiment, the telescopic lens 100 further includes an annular protective shell 7 fixed to one end of the base body 11 away from the support portion 12, and an annular seal 8 fixed to the annular protective shell 7 and in sealing contact with the protective lens assembly 5. Among them, the annular protective shell 7 can decorate the telescopic lens 100, and the annular seal 8 can be a sealing ring, which is in sealing contact with the outer peripheral side surface of the base body 11, so that the annular seal 8 can prevent dust and drain water, thereby ensuring the sealing of the telescopic lens 100.

[0053] In this embodiment, the annular rotor 31 is an integrally formed multi-pole radially magnetized annular structure or an annular structure surrounded by multiple magnets; wherein the multiple magnets are arranged along the outer circumference of the annular connecting frame 32 in an alternating manner of N poles and S poles. The magnets are multi-stage radially magnetized, which is conducive to the output of reluctance torque. The magnets can be prepared by hot pressing, sintering and other molding technologies, and have good magnetic properties.

[0054] Optionally, a plurality of magnets form a rotor, and the number of slots and poles thereof is not limited during specific implementation and can be designed according to required parameters and dimensions.

[0055] In this embodiment, the telescopic lens 100 further includes a position acquisition unit 9, which is used to acquire the rotation parameters of the rotor assembly 3; wherein the position acquisition unit 9 includes a permanent magnet 91 and a position sensor 92, wherein the permanent magnet 91 is embedded in a side of the rotor assembly 3 close to the base 1, and the position sensor 92 is fixed to the base 1, and the permanent magnet 91 and the position sensor 92 are arranged correspondingly and spaced from each other. wherein the permanent magnet 91 is embedded in a side of the annular connecting frame 32 close to the base 1. The position sensor 92 can be a sensor such as TMR / Hall, so as to detect the lifting height in real time during the lifting process and perform closed-loop control.

[0056] In this embodiment, the telescopic lens 100 further includes a circuit board 20, the circuit board 20 is fixed to the base 1, and the image receiving component 30 is electrically connected to the circuit board 20. The position sensor 92 is fixed to the circuit board 20 and forms an electrical connection. The circuit board 20 is a flexible printed circuit 20 (FPC for short), which has the characteristics of high wiring density, light weight, thin thickness, and good bendability.

[0057] In this embodiment, the buffer assembly 10 is used to buffer the movement after receiving downward pressure. The buffer assembly 10 includes a guide member 101 whose two ends are respectively fixed to the annular bottom plate 512 and the annular top plate 513 and whose length is arranged along the sliding direction of the mounting seat 51, and an elastic member 102 whose two ends are respectively connected to the lifting member 4 and the annular top plate 513. The guide member 101 passes through the lifting member 4 and is slidably assembled with the lifting member 4. When the protective mirror assembly 5 is in the extended state and the protective mirror assembly 5 is pressed down, the mounting seat 51 will move downward and compress the elastic member 102. At this time, the elastic member 102 will be further compressed first to keep the position of the lifting member 4 stationary, avoiding the stress from being directly transmitted to the raised portion 42 of the lifting member 4 and the annular connecting frame 32, thereby protecting the mechanism.

[0058] The elastic member 102 is always in a compressed state, so that when the protective assembly is not subjected to downward pressure, the lifting member 4 is ensured to always abut against the annular bottom plate 512 under the action of the rebound force provided by the elastic member 102 .

[0059] According to actual needs, the guide member 101 can be a guide rod, the elastic member 102 can be a spring, the elastic member 102 can be sleeved on the outer peripheral side of the guide member 101, and the number of guide members 101 and elastic members 102 is set to be the same as the number of protrusions 42. For example, there are three guide members 101, three elastic members 102 and three protrusions 42.

[0060] Compared with the related art, in the telescopic lens of the present invention, 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 member 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 member to move up and down or up and down, and the protective mirror assembly slides up and down under the drive of the lifting member, thereby realizing the extension or retraction of the protective mirror assembly; at the same time, after the protective mirror assembly is extended or before it is retracted, the lens assembly can automatically extend or retract, or the lens assembly can follow the movement of the lifting member or the protective mirror assembly, thereby achieving the purpose of optical zoom. Therefore, through the mutual cooperation between the stator assembly, the annular rotor, the annular connecting frame and the lifting member in the present invention, the gear set can be directly omitted, and the multi-stage gear transmission loss is avoided. The transmission efficiency is high, the power consumption is lower, the noise is smaller, the number of parts is greatly simplified, the assembly is simple, and the manufacturing cost is significantly reduced. Moreover, since the stator assembly and the rotor assembly are directly driven, the return error caused by the accumulation of gear transmission clearance can be reduced, and the transmission accuracy is higher.

[0061] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to 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 accommodated inside the stator assembly, a lifting member connected to the rotor assembly, a protective mirror assembly slidably assembled on the base and connected to the lifting member, and a lens assembly connected to the base or the protective mirror assembly or the lifting member; characterized in that: The stator assembly comprises an annular stator ring fixed to the base, a plurality of winding posts protruding and extending from the inner circumference of the stator ring toward the direction close to the lens assembly, and a plurality of windings respectively sleeved and fixed to the plurality of winding posts; the plurality of winding posts are spaced apart from the rotor assembly; The rotor assembly includes a magnetic annular rotor rotatably connected to the base, and an annular connecting frame fixed to the inner circumference of the annular rotor. The inner circumference of the annular connecting frame is provided with a track groove, and the track groove is inclined 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. When the winding is energized, it generates a mutual magnetic field with the annular rotor and drives the annular rotor to rotate, so as to drive the lifting member to move up and down along the track groove.

2. The telescopic lens according to claim 1, characterized in that: The plurality of winding poles are arranged in a circular array.

3. The telescopic lens according to claim 1, characterized in that: The stator ring is an integrally formed structure of silicon steel material or is formed by stacking a plurality of silicon steel sheets.

4. The telescopic lens according to claim 1, characterized in that: The lifting member includes an annular lifting part connected to the protective mirror assembly, and at least two protrusions fixed to the annular lifting part and slidably assembled in the track groove, and the protrusions are respectively arranged on the outer peripheral side of the annular lifting part.

5. The telescopic lens according to claim 4, characterized in that: The protective lens assembly includes a mounting seat which is slidably assembled on the base and connected at both ends to form a first accommodating cavity, and a protective lens which is fixed to one end of the mounting seat away from the base and covers the first accommodating cavity. The lifting member is accommodated in the first accommodating cavity and is connected to the lens assembly. The mounting seat is provided with at least two first clearance grooves extending from one end thereof close to the base along its sliding direction, and the protrusion passes through the first clearance grooves and is slidably assembled in the track groove.

6. The telescopic lens according to claim 5, characterized in that: The mounting seat includes a first sleeve slidably assembled on the base and provided with the first accommodating cavity, an annular bottom 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 arranged between the annular bottom plate and the annular top plate, and the lifting member and the annular top plate are elastically connected through a buffer assembly; wherein, when the protective lens assembly is not subjected to downward pressure, the lifting member always abuts against the annular bottom plate under the elastic force of the buffer assembly.

7. The telescopic lens according to claim 5, characterized in that: The base includes an annular base body, a support portion formed by extending from the inner circumference of the base body toward the direction approaching the lens assembly, and a second sleeve formed by bending and extending from the support portion toward the direction approaching the rotor assembly; the second sleeve is provided with a second accommodating cavity, the lens assembly is arranged in the second accommodating cavity at intervals, the second sleeve is arranged in the annular connecting frame and is spaced from each other, the second sleeve is provided with at least two second make way grooves respectively arranged opposite to the first make way grooves, each of the protrusions passes through the first make way groove and the second make way groove corresponding to it in sequence, and is slidably assembled in the track groove.

8. The telescopic lens according to claim 7, characterized in that: The support portion is provided with a plurality of wire outlet holes penetrating therethrough, and the wires of the winding are led out through the wire outlet holes respectively.

9. The telescopic lens according to claim 8, characterized in that: The telescopic lens further comprises a dustproof sheet, which is located at the positions of the plurality of wire outlet holes and is fixedly covered on a side of the support portion away from the stator assembly.

10. The telescopic lens according to claim 9, characterized in that: The telescopic lens further comprises an annular protective shell fixed to one end of the base body away from the supporting portion, and an annular sealing member fixed to the annular protective shell and in sealing contact with the protective lens assembly.

11. The telescopic lens according to claim 1, characterized in that: The annular rotor is an integrally formed multi-pole radially magnetized annular structure or an annular structure surrounded by a plurality of magnets; wherein the plurality of magnets are arranged along the outer circumference of the annular connecting frame in an alternating manner of N poles and S poles.

12. The telescopic lens according to claim 1, characterized in that: The telescopic lens further comprises a position acquisition unit, and the position acquisition unit is used to acquire the rotation parameters of the rotor assembly; Wherein, the position acquisition unit includes a permanent magnet and a position sensor, the permanent magnet is embedded in a side of the rotor assembly close to the base, the position sensor is fixed to the base, and the permanent magnet and the position sensor are arranged correspondingly and spaced from each other.

13. The telescopic lens according to claim 6, characterized in that: The buffer assembly includes a guide member whose two ends are respectively fixed to the annular bottom plate and the annular top plate and arranged along the sliding direction of the mounting seat, and an elastic member whose two ends are respectively connected to the lifting member and the annular top plate, and the guide member passes through the lifting member and is slidably assembled with the lifting member.

14. An electronic device, characterized in that: Comprising a telescopic lens as described in any one of claims 1-13.

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