CN113783980A - Lens transmission device and mobile terminal - Google Patents

Abstract

The invention provides a lens transmission device and a mobile terminal, the lens transmission device comprises a shell, a lens module and a driving component, the driving component can drive the lens module to be pushed out of a containing cavity or retracted into the containing cavity through a first opening, the lens transmission device also comprises a connecting plate and a lifting plate, the driving component can drive the connecting plate to move up and down along the thickness direction of the connecting plate, an elastic sheet is fixed on the connecting plate, the lifting plate comprises a main body part for supporting the lens module, connect at main part one side edge and fix the fixed part and one end that the connecting plate is close to bottom one side and connect at the fixed part edge, other end bending type extends to the connecting plate and is close to the kink of epitheca one side, and the kink compresses tightly the flexure strip to the direction that is close to the bottom and makes the flexure strip deformation, and camera lens transmission still includes the compressible setting of thickness direction along the connecting plate elastic component between main part and epitheca. The invention can reduce the thickness of the lens transmission device and the mobile terminal under the same stroke requirement.

Description

Lens transmission device and mobile terminal

[ technical field ] A method for producing a semiconductor device

The invention belongs to the technical field of electronic equipment, and particularly relates to a lens transmission device and a mobile terminal.

[ background of the invention ]

With the development of the mobile internet era, the number of intelligent mobile terminals is increasing, and among many mobile terminals, a mobile phone is undoubtedly the most common and portable mobile terminal. At present, mobile terminals such as mobile phones have a wide variety of functions, one of which is a camera function. Therefore, the lens module for photographing and recording is largely applied to the existing intelligent mobile terminal. With the increasing requirement of consumers on screen occupation ratio, in order to meet the requirements of consumers, a pop-up lens scheme is applied in the related art, and a transmission device is designed to enable a lens module to extend out of or retract into the mobile terminal, so that the mobile terminal can realize real comprehensive screen and has structural aesthetic feeling.

When the lens module is in the pop-up state, if mobile terminal received external instantaneous impact force this moment, if falling, striking, scene such as artificial maloperation, lead to the drive assembly damage that drive lens module removed easily, and reduce the concentrated power of direct effect on the drive assembly through the mode that sets up buffer spring among the correlation technique to protection drive assembly, nevertheless because buffer spring itself has length dimension, consequently it occupies great space on the moving direction of lens module, thereby lead to mobile terminal's thickness size increase.

[ summary of the invention ]

An object of the present invention is to provide a lens driving device capable of reducing the thickness of the lens driving device and a mobile terminal.

The technical scheme of the invention is as follows: a lens transmission device comprises a shell with an accommodating cavity, a lens module and a driving assembly, wherein at least part of the lens module and the driving assembly are accommodated in the accommodating cavity, the shell comprises a bottom cover and an upper shell which surrounds the bottom cover to form the accommodating cavity, the upper shell is provided with a first opening which is communicated with the accommodating cavity and external air, the driving assembly can drive the lens module to be pushed out of the accommodating cavity or retracted into the accommodating cavity through the first opening, the lens transmission device further comprises a connecting plate connected with the driving assembly and a lifting plate connected with the connecting plate, the driving assembly can drive the connecting plate to move in the thickness direction of the connecting plate, an elastic sheet is fixed on the connecting plate, the lifting plate comprises a main body part used for supporting the lens module, a fixing part which is connected to one side edge of the main body part and fixed to one side of the connecting plate close to the bottom cover, and a fixing part of which is connected to one end of the fixing part The edge of the fixing portion and the other end of the fixing portion are bent and extend to a bending portion of the connecting plate, which is close to one side of the upper shell, the bending portion presses the elastic sheet in the direction close to the bottom cover to enable the elastic sheet to deform, and the lens transmission device further comprises an elastic piece which is arranged between the main body portion and the upper shell and is compressible in the thickness direction of the connecting plate.

Furthermore, the connecting plate comprises a top surface and a bottom surface which are oppositely arranged and a side surface which is connected with the top surface and the bottom surface and is opposite to the bending part, a groove which is sunken from the top surface towards the direction close to the bottom surface is formed in the connecting plate, the groove penetrates through the side surface, the elastic sheet is suspended in the groove, and one end, far away from the fixing part, of the bending part extends into the groove and compresses the elastic sheet to enable the elastic sheet to deform.

Further, the bottom of the groove is provided with a fixing column, and the elastic sheet is fixed on the fixing column.

Further, the elastic sheet is a metal reed.

Furthermore, one end of the elastic sheet close to the bending part bends towards the direction away from the fixing part to form a protruding part, and the protruding part is in contact with the bending part.

Furthermore, the driving assembly comprises a motor, a gear transmission assembly connected with an output shaft of the motor, a screw rod rotatably connected with an output end of the gear transmission assembly and extending along the thickness direction of the connecting plate, and a nut in threaded connection with the screw rod, and the connecting plate is sleeved on the screw rod and is supported and arranged on one side of the nut far away from the bottom cover.

Furthermore, the connecting plate runs through along the thickness direction and is equipped with the guiding hole, drive assembly still includes and wears to locate the guide arm in the guiding hole, the guide arm extends along the thickness direction of connecting plate.

Further, the nut comprises a connecting portion in threaded connection with the lead screw and an abutting portion extending from the edge of the connecting portion towards the direction of the guide rod, a groove matched with the outer peripheral surface of the guide rod is formed in the abutting portion, and the groove abuts against the guide rod.

Further, the connecting plate still includes from being close to one side of bottom towards the wrapping portion that the bottom extends, the wrapping portion around guide arm one side and with the outer peripheral face contact of guide arm, be provided with on the fixed part for the wrapping portion lets the portion of stepping down, let the portion with the wrapping portion deviates from the outer peripheral face contact of guide arm one side.

Further, the upper shell comprises a bottom wall arranged at an interval with the bottom cover and a surrounding wall connected with the bottom wall and the bottom cover, the first opening is formed in the bottom wall, a positioning hole is formed in the main body portion, the elastic piece comprises a bearing at least partially arranged in the positioning hole, a main shaft arranged in the bearing in a penetrating mode and a spring sleeved on the main shaft, and two ends of the spring are respectively abutted to the bottom wall and the bearing.

The mobile terminal further comprises a shell with an accommodating space and a lens transmission device accommodated in the accommodating space, wherein the lens transmission device is any one of the lens transmission devices, a second opening communicated with the first opening is formed in the shell, the lens module is arranged opposite to the second opening, and the driving assembly can drive the lens module to be pushed out of the accommodating space or retracted into the accommodating space through the second opening.

The invention has the beneficial effects that: in the process that the lens module is pushed outwards, when the connecting plate is connected with the lifting plate, the bending part of the lifting plate compresses the elastic sheet towards the direction close to the bottom cover, so that the elastic sheet is deformed to generate pretightening force, the driving force for driving the connecting plate to move towards the direction far from the bottom cover by the driving component can be transmitted to the lifting plate, the lifting plate and the lens module move towards the direction far from the bottom cover is realized, when the lens module needs to retract inwards, the driving component drives the connecting plate to move towards the direction close to the bottom cover, and the acting force of the elastic component on the lifting plate enables the lifting plate to synchronously move towards the direction close to the bottom cover, so that the lens module is driven to retract inwards; when the lens module is in a pop-up state, when the mobile terminal is subjected to external instantaneous impact force, the bending part of the lifting plate firstly compresses the elastic sheet, but does not directly drive the connecting plate to generate instantaneous movement, so that the impact force directly acting on the connecting plate and the driving assembly can be effectively reduced, and the connecting plate and the driving assembly are protected; compared with the prior art that the buffering is carried out by adopting the buffering spring, the size occupied by the elastic sheet in the moving direction of the lens module is smaller, so that the lens module can be ensured to have larger stroke space, and the thicknesses of the lens transmission device and the mobile terminal can be reduced under the same stroke requirement.

[ description of the drawings ]

Fig. 1 is a schematic overall structure diagram of a lens driving device according to an embodiment of the present invention;

fig. 2 is a schematic view of a split structure of a lens driving device according to an embodiment of the present invention;

fig. 3 is a schematic partial structural view of a lens driving device according to an embodiment of the present invention when a lens module is retracted;

fig. 4 is a schematic partial structural view of a lens driving device according to an embodiment of the present invention when a lens module is ejected;

FIG. 5 is a cross-sectional view taken along A-A of FIG. 1;

FIG. 6 is a schematic view of the connection between the connection plate and the elastic sheet according to the embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a lifter plate according to an embodiment of the present invention;

FIG. 8 is a partial schematic view of another view of the lens actuator according to the present invention;

fig. 9 is a schematic diagram of a split structure of a mobile terminal according to an embodiment of the present invention.

[ detailed description ] embodiments

The invention is further described with reference to the following figures and embodiments.

Example (b):

referring to fig. 1, fig. 2 and fig. 5, a lens transmission device 100 according to the present invention includes a housing 10 having a receiving cavity 200, and a lens module 20 and a driving element 30 at least partially received in the receiving cavity 200, wherein the housing 10 includes a bottom cover 11 and an upper shell 12 enclosing the bottom cover 11 to form the receiving cavity 200. The upper shell 12 defines a first opening 123 for communicating the accommodating cavity 200 with the outside air, and the driving assembly 30 can drive the lens module 20 to be pushed out of the accommodating cavity 200 or retracted into the accommodating cavity 200 through the first opening 123. Specifically, the upper case 12 includes a bottom wall 121 spaced apart from the bottom cover 11, and a surrounding wall 122 connecting the bottom wall 121 and the bottom cover 11, and the first opening 123 is opened in the bottom wall 121. The bottom cover 11 is further provided with a third opening 111, the bottom of the bottom cover 11 is connected with a circuit board 500, and the circuit board 500 is electrically connected with the lens module 20 through the third opening 111.

Referring to fig. 3, 4 and 7, the lens driving device 100 further includes a connecting plate 40 connected to the driving assembly 30 and a lifting plate 50 connected to the connecting plate 40, wherein the driving assembly 30 can drive the connecting plate 40 to move up and down along a thickness direction of the connecting plate 40, and the thickness direction of the connecting plate 40 is parallel to a moving direction of the lens module 20. The connecting plate 40 is fixed with an elastic sheet 60, the lifting plate 50 includes a main body 51 for supporting the lens module 20, a fixing portion 52 connected to one side edge of the main body 51 and fixed to one side of the connecting plate close to the bottom cover 11, and a bending portion 53 having one end connected to the edge of the fixing portion 52 and the other end bent upward and extending to one side of the connecting plate 40 close to the upper shell 12, the bending portion 53 compresses the elastic sheet 60 toward the direction close to the bottom cover 11 to deform the elastic sheet 60, and the lens actuator 100 further includes an elastic member 70 compressible along the thickness direction of the connecting plate 40 and disposed between the main body 51 and the upper shell 12.

In the process of pushing the lens module 20 outwards, when the connecting plate 40 is connected with the lifting plate 50, the bending part 53 of the lifting plate 50 presses the elastic sheet 60 towards the direction close to the bottom cover 11, so that the elastic sheet 60 is deformed to generate a pretightening force, a driving force for driving the connecting plate 40 to move towards the direction away from the bottom cover 11 by the driving component 30 can be transmitted to the lifting plate 50, the lifting plate 50 and the lens module 20 move towards the direction away from the bottom cover 11 is realized, when the lens module 20 needs to retract inwards, the driving component 30 drives the connecting plate 40 to move towards the direction close to the bottom cover 11, and the acting force of the elastic component 70 on the lifting plate 50 enables the lifting plate 50 to synchronously move towards the direction close to the bottom cover 11, so that the lens module 20 is driven to retract inwards; when the lens module 20 is in the pop-up state, when the mobile terminal is subjected to an external instantaneous impact force, the bending portion 53 of the lifting plate 50 first compresses the elastic piece 60, rather than directly driving the connecting plate 40 to generate an instantaneous movement, so that the impact force directly acting on the connecting plate 40 and the driving assembly 30 can be effectively reduced, and the connecting plate 40 and the driving assembly 30 are protected; compared with the related art that the buffer spring is used for buffering, the elastic sheet 60 occupies a smaller size in the moving direction of the lens module 20, so that the lens module 20 can be ensured to have a larger stroke space, and the thicknesses of the lens transmission device 100 and the mobile terminal can be reduced under the same stroke requirement.

Referring to fig. 6 and 8, the connecting plate 40 includes a top surface 41 and a bottom surface 42 opposite to each other, and a side surface 43 connecting the top surface 41 and the bottom surface 42 and opposite to the bending portion 53, the connecting plate 40 is formed with a groove 44 recessed from the top surface 41 toward the bottom surface 42, the groove 44 penetrates the side surface 43, the elastic sheet 60 is suspended in the groove 44, one end of the bending portion 53 away from the fixing portion 52 extends into the groove 44 and presses the elastic sheet 60 to deform the elastic sheet 60, the elastic sheet 60 is disposed in the groove 44, and the bending portion 53 extends into the groove 44, which is beneficial to further reduce the thickness of the lens transmission device 100.

Preferably, the bottom of the groove 44 is provided with a fixing post 441, and the elastic sheet 60 is fixed on the fixing post 441, so that the elastic sheet 60 is suspended in the groove 44, and the elastic sheet 60 has a space for elastic deformation downward. In other possible embodiments, the elastic piece 60 may be fixed to the connecting plate 40 by bonding or hot riveting, or the elastic piece 60 and the connecting plate 40 may be integrally injection-molded, or the elastic piece 60 and the connecting plate 40 may be fitted to each other, and the fixing form of the elastic piece 60 and the connecting plate 40 is not limited in this embodiment. Optionally, the elastic sheet 60 of this embodiment is a metal reed, and specifically may be a sheet metal part or the like.

One end of the elastic piece 60 close to the bending portion 53 is bent towards the direction away from the fixing portion 52 to form a protruding portion 61, and the protruding portion 61 and the bending portion 53 are in contact with each other, compared with a straight sheet structure, the protruding portion 61 can ensure that the elastic piece 60 is in elastic contact with the bending portion 53, and ensure that the elastic piece 60 is compressed to generate deformation.

In this embodiment, as shown in fig. 2 and 5, the driving assembly 30 includes a motor 31, a gear transmission assembly 32 connected to an output shaft of the motor 31, a screw 33 rotatably connected to an output end of the gear transmission assembly 32 and extending along a thickness direction of the connecting plate 40, and a nut 34 in threaded connection with the screw 33, the connecting plate 40 is sleeved on the screw 33 and supported by the nut 34 at a side away from the bottom cover 11, the motor 31 transmits a torque to the screw 33 through the gear transmission assembly 32, and the screw 33 rotates and converts the rotation motion into a translation motion of the nut 34, so as to drive the connecting plate 40 to move along a vertical direction. Specifically, the gear transmission assembly 32 includes a first gear 321 connected to the output shaft of the motor 31, a second gear 322 engaged with the first gear 321, and a third gear 323 engaged with the second gear 322, the screw 33 is fixed in the third gear 323 in a penetrating manner, and the torque force can be adjusted through the first gear 321, the second gear 322, and the third gear 333, so as to meet different torque force requirements. The motor 31 of the present embodiment is a stepping motor, and a wide rotation speed range can be obtained and a high positional accuracy can be obtained by using the stepping motor.

In addition, the connecting plate 40 is provided with a guide hole 45 penetrating in the thickness direction, the driving assembly 30 further includes a guide rod 80 penetrating in the guide hole 45, and the guide rod 80 extends along the thickness of the connecting plate 40. The guide rods 80 can guide the up-and-down movement of the connecting plate 40, and prevent the connecting plate 40 from tilting during the movement. Specifically, the connecting plate 40 is provided with a stepped portion 46 recessed from the bottom surface 42 toward the direction close to the top surface 41, the stepped portion 46 includes a first surface 461 opposite to the top surface 41, the first surface 461 abuts against the nut 34, the connecting plate 40 is further provided with a through hole 47 for allowing the screw rod 33 to pass through, and the through hole 47 and the guide hole 45 both penetrate through the top surface 41 and the first surface 461. Disposing the nut 34 in the step portion 46 prevents the nut 34 from occupying a thickness space, and the thickness dimension of the lens barrel 100 can be further reduced. The guide rod 80 may be made of plastic material, specifically, plastic material with self-lubrication, such as polyoxymethylene, etc., so that the connection plate 40 can move up and down smoothly to reduce pause. Of course, the guide rod 80 may also be made of metal material to ensure sufficient strength, and the material of the guide rod 80 is not limited in this embodiment.

Further, the nut 34 includes a connecting portion 341 in threaded connection with the screw 33 and an abutting portion 342 extending from an edge of the connecting portion 341 toward the guide rod 80, the abutting portion 342 is provided with a groove 3421 adapted to an outer peripheral surface of the guide rod 80, and the groove 3421 abuts against the guide rod 80. The nut 34 is engaged with the guide rod 80 through the abutting portion 342, so that the guide rod 80 can guide not only the up-and-down movement of the connecting plate 40 but also the up-and-down movement of the nut 34.

In addition, the connecting plate 40 further includes a wrapping portion 48 extending from a side close to the bottom cover 11 toward the bottom cover 11, the wrapping portion 48 surrounds one side of the guide rod 80 and contacts with the outer circumferential surface of the guide rod 80, the wrapping portion 48 is in a semi-circular ring structure, and the wrapping portion 48 surrounds a semi-circular surface of the guide rod 80. The wrap portion 48 is equivalent to increasing the contact area between the connecting plate 40 and the guide rod 80 without increasing the thickness of the entire lens actuator 100, so that the guiding effect of the guide rod 80 can be further enhanced. Meanwhile, the fixing portion 52 is provided with a position yielding portion 521, the position yielding portion 521 contacts with the outer peripheral surface of the wrapping portion 48 on the side away from the guide rod 80, and the position yielding portion 521 gives way for the wrapping portion 48, so that the manufacturability requirement of assembling the connecting plate 40 and the lifting plate 50 is met. The fixing portion 52 may extend from one end of the connecting plate 40 close to the bending portion 53 to the step portion 46, so as to increase the contact area between the lifting plate 50 and the connecting plate 40, ensure the connection strength between the lifting plate 50 and the connecting plate 40, and improve the structural strength.

In this embodiment, the main body 51 further has a positioning hole 511, the elastic element 70 includes a bearing 71 at least partially disposed in the positioning hole 511, a main shaft 72 disposed through the bearing 71, and a spring 73 disposed on the main shaft 72, and two ends of the spring 73 respectively abut against the bottom wall 121 and the bearing 71. The spring 73 can not only play a limiting and buffering role in the upward movement of the lifting plate 50 to prevent the lifting plate 50 and the lens module 20 from excessively moving upwards, but also can balance the moment acting on the lifting plate 50, eliminate the transmission gap and ensure the stability and accuracy of transmission. Optionally, the two sets of elastic members 70 are disposed at two corners of the main body 51, so that the lifting plate 50 can move more smoothly and avoid tilting.

The present invention further provides a mobile terminal, as shown in fig. 9, the mobile terminal includes a housing 90 having an accommodating space 300 and a lens transmission device 100 accommodated in the accommodating space 300, the lens transmission device 100 is the lens transmission device 100 as described above, a second opening 91 communicated with the first opening 123 is formed on the housing 90, the lens module 20 is disposed opposite to the second opening 91, and the driving assembly 30 can drive the lens module 20 to be pushed out of the accommodating space 300 or retracted into the accommodating space 300 through the second opening 91. The housing 90 includes a top plate 92 and a bottom case 93 enclosing the top plate 92 to form an accommodating space 300, and the second opening 91 is opened on the bottom case 93.

In summary, in the process of pushing the lens module 20 outward, when the connecting plate 40 is connected to the lifting plate 50, the bending portion 53 of the lifting plate 50 presses the elastic sheet 60 toward the bottom cover 11, so that the elastic sheet 60 deforms to generate a pre-tightening force, and a driving force generated by the driving assembly 30 driving the connecting plate 40 to move toward the direction away from the bottom cover 11 can be transmitted to the lifting plate 50, so that the lifting plate 50 and the lens module 20 move toward the direction away from the bottom cover 11, and when the lens module 20 needs to retract inward, the driving assembly 30 driving the connecting plate 40 to move toward the direction close to the bottom cover 11, and the acting force of the elastic member 70 on the lifting plate 50 makes the lifting plate 50 move toward the direction close to the bottom cover 11 synchronously, so as to drive the lens module 20 to retract inward; when the lens module 20 is in the pop-up state, when the mobile terminal is subjected to an external instantaneous impact force, the bending portion 53 of the lifting plate 50 first compresses the elastic piece 60, rather than directly driving the connecting plate 40 to generate an instantaneous movement, so that the impact force directly acting on the connecting plate 40 and the driving assembly 30 can be effectively reduced, and the connecting plate 40 and the driving assembly 30 are protected; compared with the related art that the buffer spring is used for buffering, the elastic sheet 60 occupies a smaller size in the moving direction of the lens module 20, so that the lens module 20 can be ensured to have a larger stroke space, and the thicknesses of the lens transmission device 100 and the mobile terminal can be reduced under the same stroke requirement.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.

Claims (11)

1. A lens transmission device comprises a shell with a containing cavity, a lens module and a driving assembly, wherein the lens module and the driving assembly are at least partially contained in the containing cavity, the shell comprises a bottom cover and an upper shell which forms the containing cavity by surrounding with the bottom cover, and the lens transmission device is characterized in that: the upper shell is provided with a first opening communicated with the containing cavity and external air, the driving component can drive the lens module to be pushed out of the containing cavity or retracted into the containing cavity through the first opening, the lens transmission device further comprises a connecting plate connected with the driving component and a lifting plate connected with the connecting plate, the driving component can drive the connecting plate to move along the thickness direction of the connecting plate, an elastic sheet is fixed on the connecting plate, the lifting plate comprises a main body part supporting the lens module, a fixing part connected to one side edge of the main body part and fixed to one side of the connecting plate close to the bottom cover, and a bending part, one end of the fixing part is connected to the edge of the fixing part, the other end of the bending part is bent and extends to one side of the connecting plate close to the upper shell, and the bending part compresses the elastic sheet to the direction close to the bottom cover to enable the elastic sheet to deform, the lens driving device further includes an elastic member disposed between the main body and the upper case to be compressible in a thickness direction of the connecting plate.

2. The lens driving device according to claim 1, wherein: the connecting plate comprises a top surface and a bottom surface which are oppositely arranged and a side surface which is connected with the top surface and the bottom surface and is opposite to the bending part, a groove which is sunken from the top surface towards the direction close to the bottom surface is formed in the connecting plate, the groove penetrates through the side surface, the elastic sheet is suspended in the groove, and one end, far away from the fixing part, of the bending part extends into the groove and compresses the elastic sheet to enable the elastic sheet to deform.

3. The lens driving device according to claim 2, wherein: the bottom of the groove is provided with a fixing column, and the elastic sheet is fixed on the fixing column.

4. The lens driving device according to claim 1, wherein: the elastic sheet is a metal reed.

5. The lens driving device according to claim 2, wherein: one end of the elastic sheet close to the bent part bends towards the direction far away from the fixing part to form a protruding part, and the protruding part is in mutual contact with the bent part.

6. The lens driving device according to claim 1, wherein: the driving assembly comprises a motor, a gear transmission assembly connected with an output shaft of the motor, a screw rod rotatably connected with an output end of the gear transmission assembly and extending along the thickness direction of the connecting plate, and a nut in threaded connection with the screw rod, and the connecting plate is sleeved on the screw rod and supports and is arranged on one side, far away from the bottom cover, of the nut.

7. The lens driving device according to claim 6, wherein: the connecting plate runs through along thickness direction and is equipped with the guiding hole, drive assembly still includes and wears to locate the guide arm in the guiding hole, the guide arm extends along the thickness direction of connecting plate.

8. The lens driving device according to claim 7, wherein: the nut comprises a connecting part in threaded connection with the lead screw and an abutting part extending from the edge of the connecting part towards the direction of the guide rod, a groove matched with the outer peripheral surface of the guide rod is formed in the abutting part, and the groove abuts against the guide rod.

9. The lens driving device according to claim 8, wherein: the connecting plate still includes from being close to one side of bottom towards the wrapping portion that the bottom extends, wrapping portion surrounds guide arm one side and with the outer peripheral face contact of guide arm, be provided with on the fixed part and become to the portion of letting who lets the portion let, let the portion with wrapping portion deviates from the outer peripheral face contact of guide arm one side.

10. The lens driving device according to claim 1, wherein: the upper shell comprises a bottom wall and a surrounding wall, the bottom wall and the surrounding wall are connected with the bottom wall and the bottom cover, the first opening is formed in the bottom wall, a positioning hole is formed in the main body portion, the elastic piece comprises a bearing, a main shaft and a spring, the bearing is at least partially arranged in the positioning hole, the main shaft penetrates through the bearing, the spring is sleeved on the main shaft, and two ends of the spring are respectively abutted to the bottom wall and the bearing.

11. A mobile terminal, comprising a housing having an accommodating space and a lens transmission device accommodated in the accommodating space, wherein the lens transmission device is as claimed in any one of claims 1 to 10, the housing is provided with a second opening communicated with the first opening, the lens module is disposed opposite to the second opening, and the driving assembly can drive the lens module to be pushed out of the accommodating space or retracted into the accommodating space through the second opening.

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