CN213934362U

CN213934362U - Electric focusing lens

Info

Publication number: CN213934362U
Application number: CN202022700407.9U
Authority: CN
Inventors: 吴文龙; 唐亚
Original assignee: Jiangxi Phoenix Optical Technology Co ltd
Current assignee: Jiangxi Phoenix Optical Technology Co ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-08-10
Anticipated expiration: 2030-11-20

Abstract

The utility model discloses an electric focusing lens, which comprises a lens, a cam outer cover, a cam, a connecting seat, a power mechanism, a spring and an image sensor, wherein the first four are coaxially arranged, the side wall of the lens is provided with a straight groove, and the outer side of the side wall is provided with a first thread; the inner side of the side wall of the cam outer cover is provided with a second thread, and the first thread is matched with the second thread; the cam is sleeved outside the lens, two ends of the cam respectively abut against the lens and the cam outer cover, the side wall of the cam is provided with a chute, and the outer side of the side wall of the cam is provided with a transmission mechanism; the connecting seat is partially sleeved in the lens and connected with the image sensor, and a guide nail is installed on the connecting seat; the power mechanism is matched with the transmission mechanism to drive the cam to rotate; the guide nail is connected with the straight groove and the inclined groove in a sliding way to push the connecting seat to move axially; the spring is sleeved in the lens, and two ends of the spring respectively abut against the lens and the connecting seat. The intelligent degree of this application electronic focus is high, and the camera lens image effect is good, and stability, focusing precision and efficient are applicable to the complex environment, and long service life, maintenance cost are low.

Description

Electric focusing lens

Technical Field

The utility model belongs to the technical field of the optics focusing, concretely relates to electronic focus lens.

Background

The traditional lens focusing mode is manual focusing, which is not suitable for frequently changing environments, and the focusing precision is difficult to ensure, so that the automatic focusing lens is gradually developed and popularized. However, the focus adjusting lens has a large volume and a heavy weight, and it is difficult for a commonly used stepping motor to directly drive the whole lens to perform electric focusing.

At present, in the prior art, a lens is designed to have a part of lenses moving along an optical axis to realize optical compensation, and one scheme is as follows: the power mechanism comprises a motor driving unit, a zooming motor and a focusing motor, the zooming motor is connected with a zooming lens, the focusing motor is connected with a focusing lens, the motor driving unit independently drives the zooming motor and the focusing motor, in the focusing process of the lens, the focusing lens is respectively controlled by the focusing motor and the zooming motor to move along with the movement of the zooming lens in real time, the distance between the two lenses is adjusted to change, the image acquired on the image sensor is ensured to be clear, the acquired value is transmitted to a subsequent automatic focusing unit, the automatic focusing unit calculates to obtain the relevant parameter value of the image definition and drives the lens to move for focusing and focusing, so that the acquired target image reaches the clearest state, wherein the automatic focusing unit judges the change trend of the image definition by controlling the forward and backward movement of the focusing lens, and measuring the clearest point of the image in the reciprocating process of the focusing lens. The device has increased the optical design degree of difficulty, makes imaging performance, result of use and the focusing efficiency of product also be inferior to lens product that the lens is fixed simultaneously.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the above-mentioned problem, provide an electronic focus camera lens, focus through electronic remote adjustment image sensor position, make camera lens imaging effect better, and more intelligent, stability, focusing precision and efficient, simple structure, convenient operation, appearance are pleasing to the eye, and are applicable to the complex environment, long service life, maintenance cost hang down.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an electronic focus lens, including camera lens and image sensor, still include cam dustcoat, cam, connecting seat, power unit and spring, the coaxial setting of camera lens, cam dustcoat, cam and connecting seat, wherein:

the side wall of the lens is provided with at least one straight groove parallel to the axis, and the outer side of the side wall close to the image surface is also provided with a first thread;

the middle part of the inner side of the side wall of the cam outer cover is provided with a second thread, the cam outer cover is sleeved outside the lens, the cam and the connecting seat, and the first thread is in matched connection with the second thread;

the cam is sleeved outside the lens, one end of the cam is abutted against the lens, the other end of the cam is abutted against the cam outer cover to limit the axial movement of the cam, at least one chute is formed in the side wall of the cam, and a transmission mechanism is arranged on the outer side of the side wall;

the connecting seat is partially sleeved in the lens, one end, close to the image surface, of the connecting seat is provided with a plurality of third locking holes connected with the image sensor, the outer side of the side wall of the connecting seat is further provided with at least one nail guide hole, and the nail guide holes are provided with guide nails;

the power mechanism is fixed on the outer side of the side wall of the lens and is matched with the transmission mechanism to drive the cam to rotate;

the guide nail is connected with the straight groove and the inclined groove in a sliding manner and pushes the connecting seat to move along the axial direction when the cam rotates;

the spring is sleeved in the lens, one end of the spring is abutted against the lens, and the other end of the spring is abutted against the connecting seat.

Preferably, the transmission mechanism is a first gear coaxial with the cam; the power mechanism comprises a motor, a motor frame and a second gear, the motor frame is fixedly connected with the outer side of the side wall of the lens, the motor is connected with the motor frame, and the second gear is meshed with the first gear.

Preferably, the lateral wall of the lens is further provided with a groove for positioning the motor frame.

Preferably, the number of the guide pins, the straight grooves and the inclined grooves is three.

Preferably, the connecting seat is further provided with a through hole penetrating along the axis.

Preferably, an optical filter is arranged in the through hole.

Preferably, the optical filter is fixed by dispensing.

Preferably, a coaxial diaphragm hole is convexly arranged in the through hole of the connecting base, and the diaphragm hole is positioned on the image surface side of the optical filter.

Preferably, the side wall of the cam housing is further provided with at least one glue dispensing hole.

Preferably, the side wall of the lens is further provided with a mounting hole for externally connecting a camera.

Compared with the prior art, the beneficial effects of the utility model are that:

1) the position of the image sensor is electrically and remotely adjusted to focus, so that the lens imaging effect is better, the lens imaging effect is more intelligent, the timely focusing monitoring is facilitated, the focusing precision and efficiency are high, the structure is simple, the operation is convenient, and the lens imaging system is suitable for the frequently-changing environment;

2) the cam outer cover is used for limiting, so that the guide nail is effectively prevented from falling off to cause scattering of elements in the device, the service life and the safety are improved, and the maintenance cost is reduced;

3) the connecting seat is pushed by a spring to move towards the image surface side, and the gap between the gears is absorbed, so that the focusing is always stable in the same state after being adjusted, and the stability is higher;

4) the key parts are prevented from being exposed, the appearance is attractive and practical, and the device is suitable for severe environments, especially special occasions with high use requirements such as vibration or humid environments and the like.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a cross-sectional view of the present invention;

FIG. 3 is a partial enlarged view of FIG. I;

fig. 4 is a perspective view of the cam of the present invention;

FIG. 5 is a perspective view of the connecting seat of the present invention;

fig. 6 is a left side view of the connecting seat of the present invention;

fig. 7 is a front view of the lens of the present invention.

Description of reference numerals: 10. a lens; 20. a cam housing; 30. a cam; 40. a connecting seat; 50. guiding the nail; 60. a power mechanism; 70. a spring; 80. an optical filter; 90. an image sensor; 11. a first locking hole; 12. a straight groove; 13. a first thread; 14. a motor frame mounting hole; 15. a groove; 16. a second locking hole; 21. a second thread; 22. a limiting end face; 23. dispensing holes; 31. a chute; 32. a first gear; 41. a nail guide hole; 42. a diaphragm aperture; 43. a third locking hole; 44. dispensing a glue groove; 45. a filter groove; 61. a motor; 62. a motor frame; 63. a second gear; 621. and a fourth locking hole.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

As shown in fig. 1 to 7, an electric focusing lens includes a lens 10 and an image sensor 90, and further includes a cam housing 20, a cam 30, a connecting seat 40, a power mechanism 60, and a spring 70, where the lens 10, the cam housing 20, the cam 30, and the connecting seat 40 are coaxially disposed, and where:

the side wall of the lens 10 is provided with at least one straight groove 12 parallel to the axis, and the outer side of the side wall close to the image surface is also provided with a first thread 13;

the middle part of the inner side of the side wall of the cam outer cover 20 is provided with a second thread 21, the cam outer cover 20 is sleeved outside the lens 10, the cam 30 and the connecting seat 40, and the first thread 13 is connected with the second thread 21 in a matching way;

the cam 30 is sleeved outside the lens 10, one end of the cam 30 props against the lens 10, the other end of the cam props against the cam outer cover 20, the axial movement of the cam 30 is limited, at least one inclined groove 31 is formed in the side wall of the cam 30, and a transmission mechanism is arranged on the outer side of the side wall;

the connecting seat 40 is partially sleeved in the lens 10, one end, close to the image plane, of the connecting seat 40 is provided with a plurality of third locking holes 43 connected with the image sensor 90, the outer side of the side wall of the connecting seat 40 is also provided with at least one nail guide hole 41, and the nail guide hole 41 is provided with a nail guide 50;

the power mechanism 60 is fixed on the outer side of the side wall of the lens 10 and is matched with the transmission mechanism to drive the cam 30 to rotate;

the guide pin 50 is connected with the straight groove 12 and the inclined groove 31 in a sliding way and pushes the connecting seat 40 to move along the axial direction when the cam 30 rotates;

the spring 70 is sleeved in the lens 10, and one end of the spring abuts against the lens 10 and the other end abuts against the connecting seat 40.

The image sensor comprises a lens 10, a cam housing 20, a cam 30, a connecting seat 40, a power mechanism 60, a spring 70 and an image sensor 90, wherein the lens 10, the cam housing 20, the cam 30 and the connecting seat 40 are coaxially arranged, the side wall of the lens 10 is provided with at least one straight groove 12 parallel to the axis, and the outer side of the side wall close to an image surface is also provided with a first thread 13; the middle part of the inner side of the side wall of the cam housing 20 is provided with a second thread 21, the cam 30 is sleeved at the position of the cam housing 20 at the left side of the second thread 21, the second thread 21 is connected with the first thread 13 in a matched manner and sleeved outside the lens 10, and the connecting seat 40 is sleeved at the position of the cam housing 20 at the right side of the second thread 21. The left side of the second thread 21 is a limiting end face 22, the right end of the cam 30 abuts against the limiting end face 22, and the left end abuts against the stepped surface of the lens 10. The side wall of the cam 30 is further provided with at least one inclined groove 31, a transmission mechanism is arranged on the outer side of the side wall, the axial movement of the cam 30 is limited through the threaded connection between the cam outer cover 20 and the lens 10, so that the cam 30 can only relatively rotate relative to the lens 10 and does not relatively move, the power mechanism 60 is ensured to be always matched with the transmission mechanism, the focusing speed is favorably improved, and meanwhile, the cam outer cover 20 also plays multiple roles of preventing the leakage of cam lubricating oil, covering the inclined groove 31, beautifying the appearance and preventing the guide nail 50 from falling off. The straight groove 12 and the inclined groove 31 respectively penetrate through the side walls of the lens 10 and the cam 30, and can be designed according to a motion range, such as adjusting an inclination angle or the length of the groove, limiting the movement range of the image sensor, and adjusting the focusing sensitivity and the focusing range according to requirements.

The connecting seat 40 is partially sleeved in the lens 10, namely, one side of the connecting seat 40, which is close to the object plane, is sleeved in one side of the lens 10, which is close to the image plane, the connecting seat 40 is provided with a positioning boss, the positioning boss can be in any shape, the positioning boss is provided with a third locking hole 43 used for connecting an image sensor, and the third locking hole can be directly fixed with a PCB (printed circuit board) of the image sensor through screw locking, so that the image sensor synchronously moves and focuses when the connecting seat 40 moves, the number of the third locking holes 43 is two, and the third locking holes can also be in any other number.

The power mechanism 60 is located outside the side wall of the lens 10, and is matched with the transmission mechanism to drive the cam 30 to rotate, at least one nail guiding hole 41 is further formed outside the side wall of the connecting seat 40, the nail guiding hole 41 is provided with the nail guiding 50, the nail guiding 50 is slidably connected with the straight groove 12 and the inclined groove 31, the inclined groove 31 drives the nail guiding 50 to push the connecting seat 40 to move axially along the straight groove 12 when the cam 30 rotates, the movement adjustment of the lens 10 and the connecting seat 40 in the axial direction is realized, and therefore the focusing of the image sensor carried by the connecting seat 40 along the axial movement is promoted. Adopt electronic focusing can directly realize through rear end control, avoid disassembling once more and the drawback of manual focusing, improve the convenience that the camera refocused, focusing precision and efficient, intelligent degree is higher, imaging performance is better, and encapsulate key component through cam dustcoat 20 and help protecting inner structure, the appearance is more pleasing to the eye simultaneously, adapt to more frequent focusing calibration's of new environmental monitoring demand and adverse circumstances, especially special occasions such as vibration or humid environment that the operation requires height.

Spring 70 is in camera lens 10 from the image plane side suit of camera lens 10, and the ladder face that the left end was contradicted camera lens 10, right-hand member conflict connecting seat 40 left side terminal surface, and the elasticity that produces after spring 70 compression makes the connecting seat have the effort of right motion always, all can absorb the gear clearance between second gear 63 and first gear 32 after focusing at every turn, gets rid of the unstable state that the gear clearance produced, makes to be in same state after focusing all the time, and stability is high.

In one embodiment, the transmission mechanism is a first gear 32 coaxial with the cam 30; the power mechanism 60 includes a motor 61, a motor frame 62 and a second gear 63, the motor frame 62 is fixedly connected with the outer side of the side wall of the lens 10, the motor 61 is connected with the motor frame 62, and the second gear 63 is engaged with the first gear 32.

Wherein, the lateral wall outside of this application cam 30 is equipped with the complete tooth-shaped first gear 32 of whole circle, first gear 32 and the coaxial setting of cam 30, first gear 32 and cam 30 formula structure as an organic whole, power unit 60 includes motor 61, motor frame 62 and second gear 63, motor frame 62 is L type motor support, and the installation position that contacts with the lateral wall outside of camera lens 10 is the arc structure and is equipped with two fourth lock and pays hole 621, the lateral wall outside of camera lens 10 is equipped with two motor frame mounting holes 14 that correspond with fourth lock and pays hole 621, and connect motor frame mounting hole 14 and fourth lock and pay hole 621 through the screw, can realize the fixed connection of motor frame 62 and camera lens 10, motor frame mounting hole 14 and fourth lock and pay the hole 621 still can set up for other arbitrary quantity. The motor 61 is connected to the motor frame 62, and the second gear 63 is engaged with the first gear 32. The power mechanism 60 is arranged on the lens 10, the motor 61 drives the second gear 63 to be meshed with the first gear 32 for transmission to drive the cam 30 to rotate, and the cam 30 drives the connecting seat 40 to move along the axial direction through the guide nail 50, so that the position of the image sensor is adjusted to realize electric drive focusing, the focusing is more intelligent, the imaging effect is good, and the convenience of refocusing the camera is improved.

It should be noted that the first gear 32 and the cam 30 may also be a split structure, for example, the first gear 32 and the cam 30 may be fixedly connected by a screw, which is more convenient for replacing a vulnerable component and reduces the maintenance cost. The shape of the motor frame 62 can be adjusted according to actual requirements, the power mechanism 60 and the transmission mechanism can also adopt a belt wheel or chain wheel transmission mode and the like, or can be replaced by a direct current motor or a stepping motor according to requirements, the use freedom degree is improved, the power mechanism 60 can be modularized, and assembly or replacement is more convenient.

In one embodiment, the sidewall of the lens 10 is further opened with a groove 15 for positioning the motor frame 62.

Wherein, still seted up recess 15 on the lens 10 in this embodiment, recess 15 is used for the location of motor frame 62 or adjusts the relative position of motor frame 62 and cam 30, is favorable to improving packaging efficiency or adjustment position.

In one embodiment, the number of guide pins 50, straight slots 12 and diagonal slots 31 is three.

Wherein, lead in nail 50 one end is fixed in the nail hole 41 of leading of connecting seat 40, the other end penetrate simultaneously in straight flute 12 and the chute 31 with both sliding fit, quantity is three, and three group and hoop equipartitions altogether can make the structure more stable, and the atress is even, blocks when preventing to rotate and pause. It should be noted that the cooperation of the guide pins 50, the straight slots 12 and the inclined slots 31 can also be adjusted in number or position according to actual requirements.

In one embodiment, the connecting seat 40 further has a through hole passing through along the axis.

Wherein, the connecting base 40 is provided with a through hole penetrating along the axis for the camera and the lens 10 to cooperate for shooting.

In one embodiment, the through holes are provided with optical filters 80.

Wherein, still be equipped with light filter 80 in this application connecting seat 40's the through-hole to satisfy the demand of filtering under different environment, improve the imaging quality. As shown in fig. 6, in the present embodiment, the through hole of the connection seat 40 is a stepped hole, the aperture of the object plane side is larger than that of the image plane side, the inner wall of the connection seat 40 near the image plane side is provided with a filter groove 45, and the filter 80 is circular or ring-shaped and can be placed in the filter groove 45. The flexibility of the electric focusing lens is improved, and the electric focusing lens has higher matching capability to different environments. It should be noted that the position of the optical filter 80 may be adjusted according to actual requirements, or the optical filter 80 may be fixed in the connection seat 40 by pressing.

In one embodiment, the optical filter 80 is fixed by dispensing.

After the optical filter 80 is arranged in the connecting seat 40, the outer ring of the optical filter 80 and the optical filter groove 45 form three uniformly distributed waist-shaped glue dispensing grooves 44, the glue dispensing grooves 44 and the optical filter groove 45 have the same groove depth in the embodiment, the processing is convenient, glue is dispensed through the three glue dispensing grooves 44, the optical filter 80 is fixed on the connecting seat 40, the loosening and falling are prevented, the safety can be further improved, and the possibility that the imaging quality is influenced when glue overflows to the optical filter 80 is reduced. It should be noted that the dispensing slots 44 may also be disposed in any number or any shape, and the dispensing slots 44 may also be disposed perpendicular to the side wall of the connecting seat 40 and communicate with the filter groove 45.

In an embodiment, a coaxial diaphragm hole 42 is further disposed in the through hole of the connecting base 40 in a protruding manner, and the diaphragm hole 42 is located on the image plane side of the optical filter 80.

The diaphragm aperture 42 is used for improving the image quality of the lens optical system and improving the imaging quality.

In one embodiment, the side wall of the cam housing 20 is further provided with at least one dispensing hole 23.

In this embodiment, the sidewall of the cam housing 20 is vertically provided with a dispensing hole 23 communicated with the second thread 21, and dispensing is performed through the dispensing hole 23, so as to fix the cam housing 20 and the connecting seat 40, prevent the lens 10 or the guide pin 50 from falling off due to looseness, further improve safety and service life, and reduce maintenance cost.

In an embodiment, the sidewall of the lens 10 further defines a mounting hole for externally connecting a camera.

As shown in fig. 1, a first locking hole 11 parallel to the axis and a second locking hole 16 perpendicular to the axis are formed in the outer side of the side wall of the middle portion of the lens 10, and the first locking hole 11 and the second locking hole 16 are uniformly distributed and in any number. It should be noted that the sidewall of the lens 10 may further be provided with a threaded portion for externally connecting a camera, and the threaded portion is fixedly connected with the camera.

During assembly, the optical filter 80 is placed in the optical filter groove 45 of the connecting seat 40 and the dispensing groove 44 is dispensed to fix the optical filter 80 on the connecting seat 40, then the lens 10 and the cam 30 are respectively sleeved, the spring 70 and the connecting seat 40 are sequentially sleeved inside the lens 10, the cam 30 and the connecting seat 40 are adjusted to the guide pin hole 41, the straight groove 12 and the inclined groove 31 are aligned to be assembled into the guide pin 50, then the axial movement of the cam 30 is restrained by rotating the cam outer cover 20, so that the cam 30 can only rotate, the assembly connection can be completed by assembling the power mechanism 60, in order to avoid damaging the image sensor in the assembly process, the image sensor can be assembled on the connecting seat 40 at last or before assembling the external camera. The assembly of the cam housing 20 can prevent the cam 30 from being a moving part, which would decompose force and affect the matching between the power mechanism 60 and the transmission mechanism if there is axial relative movement between the cam 30 and the connecting base 40 during rotation, thereby affecting the axial movement efficiency of the connecting base 40 and the lens 10. After the cam housing 20 is assembled, the cam housing 20 can be fixed by dispensing through the dispensing hole 23 to prevent loosening. The cam housing 20 shields the parts except the gear of the cam 30, so that the guide nail 50 can be prevented from being separated, the contact between the cam lubricating oil and the external environment is prevented, the leakage and volatilization of the cam lubricating oil are reduced, the long-term stability of the performance is ensured, the appearance is simpler, and the effect of beautifying the appearance is achieved. During the use, motor 61 realizes the rotary motion of cam 30 through the meshing transmission, and cam 30 drives connecting seat 40 through leading nail 50 and follows axial motion, can realize that the image sensor who locks on connecting seat 40 removes the focusing at the axial relative camera lens 10, and the focusing is more intelligent, and imaging effect is good, has improved the convenience that the camera refocused.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-described embodiments are merely illustrative of the more detailed and detailed description of the present application and are not to be construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An electromotive focusing lens comprising a lens (10) and an image sensor (90), characterized in that: the electric focusing lens further comprises a cam outer cover (20), a cam (30), a connecting seat (40), a power mechanism (60) and a spring (70), wherein the lens (10), the cam outer cover (20), the cam (30) and the connecting seat (40) are coaxially arranged, and the electric focusing lens further comprises a lens body, a lens cover, a cam, a connecting seat and a spring, wherein:

the side wall of the lens (10) is provided with at least one straight groove (12) parallel to the axis, and the outer side of the side wall close to the image surface is also provided with a first thread (13);

the middle part of the inner side of the side wall of the cam outer cover (20) is provided with a second thread (21), the cam outer cover (20) is sleeved outside the lens (10), the cam (30) and the connecting seat (40), and the first thread (13) is connected with the second thread (21) in a matching manner;

the cam (30) is sleeved outside the lens (10), one end of the cam (30) is abutted against the lens (10), the other end of the cam (30) is abutted against the cam outer cover (20) to limit the axial movement of the cam (30), at least one inclined groove (31) is formed in the side wall of the cam (30), and a transmission mechanism is arranged on the outer side of the side wall;

the connecting seat (40) is partially sleeved in the lens (10), one end, close to an image surface, of the connecting seat (40) is provided with a plurality of third locking holes (43) connected with the image sensor (90), the outer side of the side wall of the connecting seat (40) is further provided with at least one nail guide hole (41), and the nail guide hole (41) is provided with a nail guide (50);

the power mechanism (60) is fixed on the outer side of the side wall of the lens (10) and is matched with the transmission mechanism to drive the cam (30) to rotate;

the guide pin (50) is connected with the straight groove (12) and the inclined groove (31) in a sliding mode and pushes the connecting seat (40) to move along the axial direction when the cam (30) rotates;

the spring (70) is sleeved in the lens (10), one end of the spring props against the lens (10), and the other end of the spring props against the connecting seat (40).

2. The electromotive focusing lens of claim 1, wherein: the transmission mechanism is a first gear (32) coaxial with the cam (30); the power mechanism (60) comprises a motor (61), a motor frame (62) and a second gear (63), the motor frame (62) is fixedly connected with the outer side of the side wall of the lens (10), the motor (61) is connected with the motor frame (62), and the second gear (63) is meshed with the first gear (32).

3. The electromotive focusing lens of claim 1, wherein: the side wall of the lens (10) is also provided with a groove (15) for positioning the motor frame (62).

4. The electromotive focusing lens of claim 1, wherein: the number of the guide nails (50), the number of the straight grooves (12) and the number of the inclined grooves (31) are three.

5. The electromotive focusing lens of claim 1, wherein: the connecting seat (40) is also provided with a through hole penetrating along the axis.

6. The electromotive focusing lens of claim 5, wherein: and an optical filter (80) is arranged in the through hole.

7. The electromotive focusing lens of claim 6, wherein: the optical filter (80) is fixed by dispensing.

8. An electromotive focusing lens according to claim 6 or 7, characterized in that: coaxial diaphragm holes (42) are further convexly arranged in the through holes of the connecting seat (40), and the diaphragm holes (42) are located on the image surface side of the optical filter (80).

9. The electromotive focusing lens of claim 1, wherein: the side wall of the cam outer cover (20) is also provided with at least one glue dispensing hole (23).

10. The electromotive focusing lens of claim 1, wherein: the side wall of the lens (10) is also provided with a mounting hole for externally connecting a camera.