CN116661087A

CN116661087A - Telescopic lens, camera module with telescopic lens and adjusting method

Info

Publication number: CN116661087A
Application number: CN202210146028.0A
Authority: CN
Inventors: 叶林敏; 刘春梅; 许源霄
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2022-02-17
Filing date: 2022-02-17
Publication date: 2023-08-29

Abstract

The invention provides a telescopic lens, an image pickup module with the telescopic lens and an adjusting method, wherein the telescopic lens comprises a light-transmitting cover plate, an optical lens, a driving assembly and an elastic mechanism, the optical lens comprises a first lens assembly and a second lens assembly, the first lens assembly and the second lens assembly are provided with a gap with adjustable distance, an adjustable gap exists between the glass cover plate and the first lens assembly, the driving assembly comprises a first driving part and a second driving part, the first driving part is positioned outside the second driving part, the light-transmitting cover plate is supported above the light incident side of the optical lens by the first driving part, and the optical lens is arranged in the second driving part in a transmission mode, and the elastic mechanism is arranged between the first lens assembly and the second lens assembly.

Description

Telescopic lens, camera module with telescopic lens and adjusting method

Technical Field

The present invention relates to the field of camera modules, and more particularly, to a retractable lens, a camera module with the retractable lens, and an adjusting method.

Background

The size that current module of making a video recording is along with its imaging quality's continuous promotion sensitization chip constantly increases, and the height of module also constantly increases, when imaging in assembling terminal equipment with it, though jumbo size sensitization chip can promote imaging quality, can make the height increase of making a video recording the module, when installing terminal equipment with it in, its back can bulge terminal equipment shell certain height, when receiving external effort, its convex part is not only damaged easily, still can influence the aesthetic measure of its terminal product appearance, reduces user's experience and feels.

In order to improve the imaging quality of the camera module and reduce the overall height of the camera module, the camera module is suitable for the trend of developing the light and thin terminal equipment, and in the prior art, a telescopic camera module structure exists, namely, a telescopic structure is arranged on an optical lens, when the camera module works, an optical lens is driven to be far away from a photosensitive chip through the telescopic structure, when the camera module does not work, the optical lens is close to the photosensitive chip through the telescopic structure, the distance between the photosensitive chip and the optical lens is greatly compressed when the camera module does not work, and the structural design mode of the telescopic optical lens is used for matching with the photosensitive chip with a large size, so that the contradiction between the imaging quality and the module height can be solved.

However, since the optical lens needs to extend out of the housing of the terminal device in the imaging process, when the extending optical lens receives external force, such as beating, pressing and the like, the optical lens is extremely easy to damage, when the external force is large, the whole module structure is damaged, and normal operation of the terminal device cannot be ensured.

Disclosure of Invention

The invention provides a telescopic lens, an image pickup module with the telescopic lens and an adjusting method, wherein the telescopic lens of the image pickup module can be telescopic back and forth along the optical axis direction, and the telescopic lens is beneficial to solving the contradiction between the imaging quality of the image pickup module and the height of the image pickup module.

Another advantage of the present invention is to provide a zoom lens, an image capturing module with the zoom lens, and an adjustment method, wherein the zoom lens includes a CG (Cover Glass Cover plate) of a zoom structure, and the image capturing module is protected in an inner space thereof by a CG protection function, so as to improve a dustproof and waterproof performance of the image capturing module.

Another advantage of the present invention is to provide a retractable lens, an image capturing module with the retractable lens, and an adjusting method, wherein the elastic force of the elastic element provides an acting force of the optical lens away from the photosensitive chip, so as to simplify the driving structure design of the module.

The invention further provides a telescopic lens, an image pickup module with the telescopic lens and an adjusting method, wherein the alignment degree of the glass cover plate in the telescopic process is ensured by arranging guide rods on two sides of the module.

Another advantage of the present invention is to provide a retractable lens, an image capturing module with the retractable lens, and an adjusting method, wherein by driving a glass cover plate by a stepper motor, sufficient working space is provided for the image capturing module when the stepper motor drives the glass cover plate to rise, and the height of the image capturing module is compressed when the stepper motor drives the glass cover plate to fall, thereby achieving miniaturization of the whole structure.

Another advantage of the present invention is to provide a retractable lens, an image capturing module with the retractable lens, and an adjusting method, wherein the performance of the optical lens can be changed in a working state by setting the optical lens as a split type, so as to adapt to shooting in different environments, and improve the imaging quality of the image capturing module.

Another advantage of the present invention is to provide a retractable lens, an image capturing module with the retractable lens, and an adjusting method, in which by setting the optical lenses as a split type, the gap between the optical lenses can be greatly compressed when the optical lenses are not in operation, so that the height of the module is minimized, and the problem that the module protrudes out of the terminal housing, thereby affecting the aesthetic appearance of the terminal is solved.

The invention further provides a telescopic lens, an image pickup module with the telescopic lens and an adjusting method, wherein the imaging quality of the image pickup module is improved while the miniaturization of the whole structure is realized by using the chip anti-shake mode and matching with the expansion and contraction of the glass cover plate.

According to one aspect of the present invention, a retractable lens of the present invention, which can achieve the foregoing and other objects and advantages, is suitable for an image capturing module, and the retractable module includes:

a light-transmitting cover plate;

an optical lens, wherein the optical lens comprises a first lens component and a second lens component, and the first lens component and the second lens component have a gap with adjustable distance; and

a driving assembly, wherein the driving assembly comprises a first driving part and a second driving part, wherein the first driving part is positioned on the outer side of the second driving part, the light-transmitting cover plate is supported above the light incident side of the optical lens by the first driving part, and the optical lens is arranged on the second driving part in a driving way;

The first driving part drives the light-transmitting cover plate to move upwards along the optical axis direction so as to initially focus the camera module, and the second driving part drives the optical lens to move along the optical axis direction so as to refocus the camera module.

According to one embodiment of the present invention, the lens assembly further comprises an elastic mechanism, wherein the elastic mechanism is disposed between the first lens assembly and the second lens assembly, and when the first lens assembly moves towards the direction of the interval cavity under the action of the elastic mechanism during preliminary focusing, the gap between the first lens assembly and the second lens assembly is increased.

According to one embodiment of the present invention, the elastic mechanism includes a guide rod fixedly disposed on the second lens component and a spring telescopically sleeved on the guide rod, wherein the first lens component is acted on by the elastic mechanism.

According to an embodiment of the present invention, the elastic mechanism includes a guide rod fixedly provided to the first driving portion, and a spring telescopically provided to the guide rod, wherein the first lens assembly is driven by the elastic mechanism.

According to an embodiment of the present invention, the driving assembly further includes a shift mechanism, wherein the shift mechanism is disposed between the first driving portion and the second driving portion, and the shift mechanism is connected to the elastic mechanism, and the shift mechanism is configured to restrict displacement of the first lens assembly in the optical axis direction.

According to an embodiment of the present invention, the driving assembly further includes a shift mechanism, wherein the shift mechanism is disposed between the second driving portion and the optical lens, and the shift mechanism is connected to the elastic mechanism, and the shift mechanism is configured to restrict displacement of the first lens assembly in the optical axis direction.

According to one embodiment of the present invention, the gear transmission mechanism includes a gear element and a conductive element, wherein the gear element is fixed in position, the first lens assembly is connected to the conductive element and is connected to the elastic mechanism through the conductive element, wherein the gear element is of a hollow structure, and the conductive element is sleeved on the inner side of the gear element and limits the moving distance of the conductive element through the gear element.

According to one embodiment of the invention, the gear element comprises a gear body and at least one baffle plate extending integrally inward from the gear body, wherein the baffle plate is adapted to block the conductive element from moving upwards.

According to one embodiment of the invention, the conductive element is arranged inside the gear element, the conductive element comprising a conductive body and at least one conductive pillar, wherein the conductive pillar extends integrally upwards from the conductive body.

According to an embodiment of the present invention, the first driving portion includes a first driving element, a movable sleeve, and a fixed base, wherein the driving element is provided to the fixed base, the first driving element is drivingly connected to the movable sleeve, and the movable sleeve is driven to move up and down in the optical axis direction by the first driving element.

According to one embodiment of the invention, the first driving element comprises a driving mechanism and a transmission mechanism, wherein the transmission mechanism is in transmission connection with the driving mechanism and the movable sleeve, the transmission mechanism is driven by the driving mechanism, and the movable sleeve is driven by the transmission mechanism to move up and down along the optical axis direction.

According to one embodiment of the invention, the first driving element is a stepper motor

According to one embodiment of the present invention, the transmission mechanism further includes a first gear, a second gear, and a transmission screw, wherein the first gear and the second gear are pivotably provided to the fixed base, the first gear is provided to the first driving element, and the first gear is rotatable in synchronization with the first driving element, the first gear and the second gear are engaged, one end of the transmission screw is fixed to the second gear, and the other end of the transmission screw is drivingly connected to the movable sleeve.

According to one embodiment of the present invention, the movable sleeve includes a sleeve body, a sleeve movable portion, a sleeve supporting portion, and a sleeve protrusion, wherein an opening is provided on an upper surface of the sleeve supporting portion, the light-transmitting cover plate is disposed at the opening, and the sleeve movable portion moves along a guide rod direction parallel to the optical axis.

According to one embodiment of the present invention, the sleeve protrusion is located at a lower end of the sleeve supporting part, and the sleeve protrusion integrally extends downward from the sleeve supporting part.

According to one embodiment of the present invention, the sleeve protrusion corresponds to an upper end of the second driving part, and in an inactive state, the sleeve protrusion is pressed against the upper end of the second driving part and presses the first lens assembly downward through the second driving part, so that the elastic mechanism is compressed.

According to one embodiment of the present invention, the first driving part further includes a driving housing and a waterproof and dustproof cover, wherein the driving housing covers the outer side of the optical lens, one end of the waterproof and dustproof cover is disposed on the driving housing, and the other end of the waterproof and dustproof cover is connected with the sleeve movable part.

According to one embodiment of the present invention, the first driving part further includes at least one guide member, wherein the at least one guide member is disposed at the fixed base along the direction of the optical axis, and the guide member includes a main guide bar and a sub guide bar, wherein the main guide bar and the sub guide bar are located at two diagonal positions of the fixed base.

According to another aspect of the present invention, there is further provided an image capturing module including:

the retractable lens as described above; and

the telescopic lens is arranged on a photosensitive path of the photosensitive assembly.

According to another aspect of the present invention, the present invention further provides an adjustment method of an image capturing module, including the following steps:

(a) The first driving part drives a light-transmitting cover plate to move upwards along the optical axis direction, wherein a first lens component of the optical lens is popped up along the optical axis direction by an elastic mechanism so as to perform preliminary adjustment on the camera module; and

(b) The optical lens is driven by a second driving part to further move along the optical axis direction, so that the precise adjustment of the camera module is realized.

According to an embodiment of the present invention, in step (a) of the adjustment method of the image capturing module, in an operating state, the first driving portion drives the light-transmitting cover plate to move in the optical axis direction, so that a variable-distance spacer cavity is formed between the light-transmitting cover plate and the first lens assembly, so as to adjust the position of the optical lens.

According to an embodiment of the present invention, in the step (a) of the adjusting method of the image capturing module, the optical lens further includes a second lens assembly, and there is a space between the first lens assembly and the second lens assembly, and the first lens assembly is driven to move by the elastic mechanism so as to change the space.

Further objects and advantages of the present invention will become fully apparent from the following description and the accompanying drawings.

These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description and accompanying drawings.

Drawings

Fig. 1 is a schematic diagram of an overall structure of an image capturing module according to a first preferred embodiment of the present invention.

Fig. 2A is a schematic cross-sectional view of the camera module according to the first preferred embodiment of the present invention in an operating state.

Fig. 2B is a schematic cross-sectional view of the camera module in an inactive state according to the first preferred embodiment of the present invention.

Fig. 3 is an exploded view of the camera module according to the first preferred embodiment of the present invention.

Fig. 4 is an exploded view of a first driving assembly of the retractable lens of the camera module according to the first preferred embodiment of the present invention.

Fig. 5 is a schematic structural view of a movable sleeve of the retractable lens of the camera module according to the first preferred embodiment of the present invention.

Fig. 6 is an exploded view of the driving assembly of the retractable lens of the camera module according to the first preferred embodiment of the present invention.

Fig. 7A is a schematic diagram of the driving assembly of the camera module according to the first preferred embodiment of the present invention, wherein the camera module is in an operating state.

Fig. 7B is a schematic diagram of the driving assembly of the camera module according to the first preferred embodiment of the present invention, wherein the camera module is in an inactive state.

Fig. 8 is a schematic overall structure of an image capturing module according to a second preferred embodiment of the present invention.

Fig. 9A is a schematic cross-sectional view of the camera module according to the second preferred embodiment of the present invention in an operating state.

Fig. 9B is a schematic cross-sectional view of the camera module in an inactive state according to the second preferred embodiment of the present invention.

Fig. 10 is an exploded view of the camera module according to the second preferred embodiment of the present invention.

Fig. 11A and 11B are schematic views illustrating a driving state of a second driving assembly of the camera module according to the second preferred embodiment of the present invention.

Fig. 12 is a schematic structural diagram of an electronic device to which the camera module of the present invention is applied.

Fig. 13 is a schematic diagram of method steps of a focusing method of an image capturing module according to another aspect of the present invention.

Detailed Description

It is pointed out that the embodiments shown in the drawings are only for the purpose of illustrating and explaining the inventive concept in detail and image, which are not necessarily drawn to scale in terms of size and structure nor are they to be construed as limiting the inventive concept.

Terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible to be mentioned in the present specification are defined with respect to the configurations shown in the respective drawings, which are relative concepts, and thus may be changed according to different positions and different use states thereof. These and other directional terms should not be construed as limiting terms.

In order to meet the development trend of the light and thin terminal equipment, various manufacturers are devoted to researching the camera module with high imaging quality and reduced or unchanged overall height. The imaging quality of the camera module is improved, the size of the photosensitive chip is increased, along with the increasing size of the photosensitive chip, especially after the image surface size of the photosensitive chip is increased to 1 inch, the thickness of the module TTL and the camera head is increased further, so that the irreconcilable contradiction exists between the increase of the size of the chip and the height of the module.

How to use a large-size chip to improve the imaging quality of a camera module and simultaneously reduce or keep unchanged the overall height of the camera module is an urgent problem to be solved by various large manufacturers at present. In order to solve the problem, the invention provides a CG telescopic lens, namely when an image pickup module is in a working state, the CG is extended out by a telescopic structure, and an optical lens is far away from a photosensitive chip by a certain distance through an elastic element arranged at the lens end, so that the TTL requirement of imaging of a large-size chip is met, and the requirement of module shooting is completed; after shooting is completed, the CG is retracted to an initial position by utilizing the telescopic structure, and meanwhile, the distance between the photosensitive chip and the optical lens is compressed, so that the distance between the photosensitive chip and the optical lens is restored to an initial state, and the overall height of the shooting module is reduced in a non-working state. The arrangement mode can effectively solve the inherent contradiction between the imaging quality improvement of the large-size photosensitive chip and the height of the module, so that the terminal equipment provided with the camera module can be thinned, the shooting function of the terminal equipment is realized, the overall aesthetic property of the terminal equipment is improved, the requirements of the market are met, and the use satisfaction of users is improved.

Based on the problem between module chip size increase and the increase of module height, through the way of falling high to making a video recording of jumbo size chip analysis, in current module design, there is the distance in four spaces to carry out corresponding optimization, is in proper order according to the height from big to little: (1) height H1 of the lens body and compression of the lens gap; (2) the height H2 between the bottom surface of the optical lens and the photosensitive assembly; (3) CG to lens end face distance H3; (4) the height H4 of the photosensitive assembly itself. Through analysis and comparison, the current photosensitive assembly adopts a design mode of photosensitive chips and steel sheets, and the height-reducible distance is limited, so the heights of H1, H2 and H3 are mainly optimized correspondingly, and the main design thinking is as follows: the H1, H2 and H3 meet the imaging distance requirement in the working state, and the distance between the H1, H2 and H3 is compressed to the minimum in the non-working state, so that the height of the device is reduced in the non-working state, and the development trend of thinning of terminal equipment matched with the device is met.

According to the above analysis requirements, the present invention provides a CG telescopic lens and an imaging module with the CG telescopic lens, where the imaging module includes:

The light-transmitting cover plate covers the upper end face of the optical lens, and the gap between the light-transmitting cover plate and the optical lens can be changed;

the optical lens comprises a first lens component and a second lens component, wherein a gap exists between the first lens component and the second lens component, and the first lens component and the second lens component can form an optical system;

the photosensitive assembly comprises a circuit board, a photosensitive chip, an electronic element and a light filtering element, wherein the photosensitive chip is fixed on the upper surface of the circuit board and is communicated with the circuit board, the electronic elements are distributed on the side edge of the photosensitive chip, the electronic elements and the connecting part of the photosensitive chip and the circuit board are molded through a molding process, the upper end face of a formed molding seat is provided with a light filtering element mounting position, namely, the molding seat molds the electronic elements in the molding seat, and the integral height of the photosensitive element can be effectively reduced.

The first driving part comprises a driving shell, a first driving element, a movable sleeve, a guide member, a first sensing assembly and a fixed base, wherein the first driving element can be a stepping motor;

The second driving part comprises a second driving element, a transmission mechanism and a telescopic structure, wherein the second driving element can be one type of AF motor and is fixed with the optical lens, and the transmission mechanism is positioned on the upper end surface of the second driving element and is mainly used for realizing focusing in the shooting process so as to prevent the optical lens from excessively moving.

The third driving part is mainly a photosensitive chip anti-shake component and comprises a chip anti-shake fixing part, a chip anti-shake movable part and a driving piece SMA, wherein the chip anti-shake movable part is connected with the photosensitive component, and when the photosensitive chip movable part moves relative to the fixing part, the photosensitive chip can be driven to move, so that the anti-shake function of the photosensitive chip is realized.

The elastic mechanism comprises a spring and a guide rod, wherein the spring is positioned between the two lens assemblies, is sleeved outside the guide rod, and provides an acting force for keeping the two lens assemblies away from each other through the spring while supporting the two lens assemblies.

According to the CG telescopic module designed by the application, the CG cover plate is driven by the stepping motor to stretch along the optical axis direction, and the CG cover plate is matched with the elastic component and the support rod which are arranged between the optical lenses, when the module is in a working state, the CG is driven by the stepping motor to rise along the optical axis direction, and the distance between the optical lenses is increased under the action of the elastic component so as to meet the TTL requirement of imaging; after shooting is completed, the stepping motor drives the CG to move along the direction opposite to the optical axis, so that the CG compresses the distance between the first lens assembly and the second lens assembly, the CG returns to an initial state, the whole height is kept to be reduced, and a shooting process is realized.

In a specific shooting process, when the TTL of the optical lens meets the imaging requirement of a large-size chip, in order to further improve the imaging quality, a second driving element arranged on the optical lens, namely an AF motor, is utilized to realize focusing, so that a shot photo is clearer; the shake in the shooting process is corrected by using a third driving element, namely a chip anti-shake motor, arranged at the photosensitive chip end so as to complete the shooting process with high quality. Namely, the CG telescopic module provided by the proposal solves the contradiction between the large-size chip and the height of the module by utilizing the first driving element, so that the whole module structure can keep miniaturized; the second driving element is used for solving the focusing problem in the imaging process of the large-size chip, only part of the optical lens is driven to focus, the driving force requirement is reduced, and meanwhile the shooting definition problem is solved; the anti-shake problem of the large-size chip is solved by utilizing the third driving element, the driving element is only arranged at the photosensitive chip end of the camera module, only the photosensitive chip is driven to move, the anti-shake is realized relative to the whole optical lens, the anti-shake requirement can be met under the condition of providing smaller driving force by adopting the arrangement mode, and meanwhile, the miniaturization of the whole module structure can be realized.

Therefore, the CG telescopic module provided by the application can provide a better solution application for imaging of large-size chips, and accords with the development trend of the current camera module.

Referring to fig. 1 to 7B of drawings of the present specification, a retractable lens and an image pickup module with the retractable lens according to a first preferred embodiment of the present application are explained in the following description. The camera module comprises a telescopic lens 100 and a photosensitive assembly 200, wherein the telescopic lens 100 is arranged on a photosensitive path of the photosensitive assembly 200. The retractable lens 100 includes a light-transmitting cover plate 10, an optical lens 20, and a driving assembly 30, wherein the light-transmitting cover plate 10 is CG (cover glass) of the present application disposed on an upper end surface of the optical lens 20, and is mainly used for protecting the optical lens 20 and for passing light. The light-transmitting cover plate 10 and the optical lens 20 are disposed on the driving assembly 30, and the movement of the light-transmitting cover plate 10 and the optical lens 20 is driven by the driving assembly 30.

In detail, the camera module has an operating state and an inactive state, when the camera module is in the operating state, the driving assembly 30 drives the light-transmitting cover plate 10 to move upwards along the optical axis direction of the optical lens 20, so that a space cavity 102 with a variable distance is formed between the light-transmitting cover plate 10 and the optical lens 20, and a larger zooming or focusing space of the optical lens 20 is provided; when the camera module is in the non-working state, the driving assembly 30 drives the light-transmitting cover plate 10 to move downwards along the optical axis direction, so as to reduce the size of the spacing cavity 102 between the light-transmitting cover plate 10 and the optical lens 20, thereby reducing the size of the camera module in the height direction, and being beneficial to miniaturization of the overall size of the camera module.

In other words, the light-transmitting cover plate 10 is supported above the optical lens 20 by the first driving part 31, and the light-transmitting cover plate 10 may be driven in the optical axis direction by the first driving part 31 such that the spacing cavity 102 having a variable distance is formed between the light-transmitting cover plate 10 and the optical lens 20 in order to adjust the focal length of the optical lens 20.

The driving assembly 30 includes a first driving part 31 and a second driving part 32, wherein the first driving part 31 is connected to the light-transmitting cover plate 10, and the light-transmitting cover plate 10 is driven to move up and down along the optical axis direction by the first driving part 31. The second driving part 32 is connected to the optical lens 20, and the second driving part 32 drives the optical lens 20 to achieve focusing.

In short, the CG is provided to the first driving portion 31, and the first driving portion 31 is mainly for driving the CG to move up and down in the optical axis direction to achieve compression of the distance between the optical lens 20 and the photosensitive member 200. The second driving part 32 is disposed inside the first driving part 31, which may be one type of AF motor, and the second driving part 32 is disposed at a side surface of the optical lens 20, mainly for achieving focusing of the optical lens 20 during photographing, so as to obtain a clear image.

As shown in fig. 2A to 6, the first driving part includes a driving housing 311, a first driving element 312, a movable sleeve 313, a waterproof and dustproof cover 314, a guiding member 315, a first sensing assembly, a fixed base 317, and a first electrical connection portion. The driving housing 311 is disposed at a side of the fixing base 317, and forms an accommodating space with the fixing base 317, where the accommodating space is used for accommodating other components in the camera module therein, so as to enhance the overall structural stability and protect the internal components.

The first driving member 312 is drivingly connected to the movable sleeve 313, and the movable sleeve 313 is driven to move up and down in the optical axis direction by the first driving member 312. The light-transmitting cover plate 10 is disposed at the top end of the movable sleeve 313 and moves with the movable sleeve 313. The first driving element 312 is disposed on the fixed base 317, and the first driving element 312 drives the movable sleeve 313 to move up and down with the fixed base 317 as a support. It should be noted that, the movable sleeve 313 is sleeved on the outer side of the optical lens 20, and when the image capturing module is in the working state, the first driving element 312 drives the light-transmitting cover plate 10 to move upwards along the optical axis through the movable sleeve 313, so that a gap between the lower surface of the light-transmitting cover plate 10 and the upper end surface of the optical lens 20 is increased.

In the preferred embodiment of the present invention, the first driving member 312 is mainly used to drive CG up/down in the optical axis direction, and may be one of a piezoelectric motor or a stepping motor. Preferably, in this one embodiment of the present invention, the first driving element 312 is a stepper motor driven driving assembly.

In detail, the first driving element 312 includes a driving mechanism 3121 and a transmission mechanism 3122, wherein the transmission mechanism 3122 is drivingly connected to the driving mechanism 3121 and the movable sleeve 313, the transmission mechanism 3122 is driven by the driving mechanism 3121, and the movable sleeve 313 is driven to move up and down in the optical axis direction by the transmission mechanism 3122. It should be noted that in the preferred embodiment of the present invention, the first driving element 312 is a stepper motor.

As shown in fig. 4, the transmission 3122 is a geared screw transmission. The transmission mechanism 3122 further includes a first gear 31221, a second gear 31222, and a transmission screw 31223, wherein the first gear 31221 and the second gear 31222 are pivotably disposed to the fixed base 317. The first gear 31221 is disposed on the first driving element 312, and the first gear 31221 may be synchronously rotated with the first driving element 312, the first gear 31221 and the second gear 31222 are engaged, one end of the driving screw 31223 is fixed to the second gear 31222, and the other end of the driving screw 31223 is drivingly connected with the movable sleeve 313. When the camera module is in the working state, the first driving element 312 drives the first gear 31221 to rotate, and the second gear 31222 drives the driving screw 31223 to move under the action of the first gear 31221, wherein the driving screw 31223 is pivotally connected to the movable sleeve 313 in a driving manner, and the driving screw 31223 drives the movable sleeve 313 to move in parallel along the optical axis direction.

The first driving element 312 is fixed to one side of the fixed base 317, and the first driving element 312 has a driving screw mechanism built therein, wherein the driving screw mechanism 312 of the first driving element 312 is fixedly connected with the first gear 31221.

The movable sleeve 313 includes a sleeve main body 3131, a sleeve movable portion 3132, a sleeve supporting portion 3133, and a sleeve protrusion 3134, wherein an opening is provided on an upper surface of the sleeve supporting portion 3133, the light-transmitting cover plate 10 is disposed at the opening, and the sleeve movable portion 3132 moves along a guide rod direction parallel to the optical axis, is sleeved on the driving screw 31223 of the driving mechanism 3122, and is connected to the driving screw 31223.

When the stepping motor works, the gear device is driven to rotate, so that the gear drives the sleeve movable part 3132 to move, and when the sleeve movable part 3132 moves up and down along the guide rod, the light-transmitting cover plate 10 fixed at the opening of the upper surface of the supporting part is also driven to move up and down along the optical axis direction, so that the telescopic movement of the optical lens 20 is realized. Meanwhile, on the inner side wall corresponding to the opening of the sleeve movable portion 3132, a corresponding sleeve protrusion 3134 is provided, that is, extends downward by a certain height along the direction of the optical axis.

As shown in fig. 2A to 6, the sleeve movable portion 3132 is located on the circumferential side of the sleeve main body 3131, which corresponds to the position of the driving mechanism 3121, and the sleeve movable portion 3132 is provided with a thread groove corresponding to the drive screw 31223. The sleeve support 3133 is located at an intermediate position of the sleeve body 3131, wherein the sleeve support 3133 supports the light-transmitting cover plate 10 and holds the light-transmitting cover plate 10 in an optical path of the optical lens 20. The sleeve support 3133 is provided with a light incident portion, wherein the light-transmitting cover plate 10 is fixed to the light incident portion of the sleeve support 3133 by the sleeve support 3133. The sleeve protrusion 3134 is located at a lower end of the sleeve support 3133, and the sleeve protrusion 3134 integrally extends downward from the sleeve support 3133.

The movable sleeve 313 moves relative to the driving housing 311 along the direction of the optical axis under the action of the stepping motor, so that a gap exists between the movable sleeve 3132 and the driving housing 311 in order to prevent external dust from entering the inside of the module from the gap, and the imaging quality of the module is affected, the first driving portion 30 further comprises a waterproof and dustproof cover 314, the waterproof and dustproof cover 314 is made of a flexible rubber material, one end of the waterproof and dustproof cover 314 is arranged on the driving housing 311, the other end of the waterproof and dustproof cover is connected with the movable sleeve 3132, and when the movable sleeve 3132 moves relative to the driving housing 311, the waterproof and dustproof cover 314 can seal the gap between the movable sleeve 3132 and the movable sleeve to prevent external dust from entering the inside of the module.

To further secure the degree of collimation in which the driving mechanism 3121 drives the sleeve movable portion 3132 to move in the optical axis direction, that is, such that the direction of movement is parallel to the optical axis direction. The first driving part 31 further includes at least one guide member 315, wherein the at least one guide member 315 is disposed on the fixing base 317 along the direction of the optical axis, which is located at two opposite corners of the fixing base 317. Preferably, in the preferred embodiment of the present invention, the guide member 315 includes a main guide bar 3151 and a sub guide bar 3152, wherein the main guide bar 3151 is used to ensure alignment during movement so that the driving mechanism 3121 drives the sleeve to move along the direction of the optical axis, and the sub guide bar 3152 is used to prevent rotation during movement of the sleeve, i.e. further ensure alignment during lifting of the sleeve. The main guide bar 3151 and the sub guide bar 3152 of the guide member 315 are located at two diagonal positions of the fixed base 317, and the moving direction of the movable sleeve is guided by the guide member 315.

Further, in order to sense the position of the sleeve movable portion 3132, to improve the accuracy of adjusting the light-transmitting cover plate 10, the first driving portion 31 further includes at least one first sensing component, wherein the first sensing component is disposed on the movable sleeve 313, and the moving position of the movable sleeve 313 is sensed by the first sensing component. The first sensing component further comprises a first position sensing magnet and a first position sensing element, wherein the first position sensing magnet is arranged on the sleeve movable part 3132 and is arranged on the side surface of the sleeve movable part 3132, the first position sensing element is arranged at a position corresponding to the first position sensing magnet, and the position of the sleeve movable part 3132, namely the position of the light-transmitting cover plate 10 in the optical axis direction, is accurately sensed by sensing the position of the magnet.

The first driving part 31 further comprises a first electrical connection for mainly energizing the driving mechanism 3121 and the sensing element, which cooperates with other wires inside the module for providing the operation current of the stepper motor. When the first electrical connection part is electrified for shooting, the stepping motor drives the sleeve movable part 3132 to ascend along the direction of the optical axis, namely the light-transmitting cover plate 10 is driven to ascend; when the photographing process is completed, the stepping motor drives the sleeve movable part 3132 to descend in a direction opposite to the optical axis, i.e., drives the light-transmitting cover plate 10 to descend so as to return to an initial state, so that the overall height is lowered.

As shown in fig. 2A and 2B, the optical lens 20 is a split optical lens, and includes a first lens component 21 and a second lens component 22, where the first lens component 21 is located on the light incident side of the second lens component 22. The first lens component 21 includes a first lens barrel 211 and at least one first lens group 212, the second lens component 22 includes a second lens barrel 221 and at least one second lens group 222, a gap 23 is between the first lens group 212 and the second lens group 222, and the two lens components can form an integral optical imaging system.

It should be noted that the gap 23 between the first lens component 21 and the second lens component 22 is adjustable, when the lens component is in an operating state, the gap 23 between the two lens components is adjusted to meet the TTL requirement of imaging, and when the lens component is in an inactive state, the gap 23 between the two lens components is compressed, so that the overall structure height is reduced.

In order to adjust the gap 23 between the first lens component 21 and the second lens component 22, the telescopic lens 100 further comprises at least one elastic mechanism 40, wherein the at least one elastic mechanism 40 is disposed between the first lens component 21 and the second lens component 22, and the at least one elastic mechanism 40 drives the first lens component 21 to move, so that the gap 23 between the first lens component 21 and the second lens component 22 is increased to meet the optical requirement of the camera module.

Each of the elastic mechanisms 40 further includes a guide rod 41 and a spring 42, wherein the guide rod 41 is fixedly provided to the second barrel 221 of the second lens part 22, and the spring 42 is telescopically provided to the guide rod 41. One end of the guide bar 41 is fixed to one side of the second barrel 221 of the second lens part 22, and the other end of the guide bar 41 extends upward from the second lens part 22.

Preferably, in the preferred embodiment of the present invention, the number of the elastic mechanisms 40 is at least two, and the elastic mechanisms 40 are uniformly and symmetrically arranged at the second barrel 221 of the second lens part 22.

When the optical lens 20 images, the acting force arranged on the upper end surface of the optical lens 20 is released, and the first lens assembly 21 moves relative to the second lens assembly 22 under the action of the elastic mechanism 40, so that the distance between the first lens assembly and the second lens assembly meets the TTL requirement when a large-size chip images. When the lens is in an inactive state, a force is applied to the upper end surface of the optical lens 20, overcoming the elastic force of the elastic structure between the first and second lens components, compressing it to a state before imaging, i.e., reducing the gap between the first lens and the second lens, thereby reducing the height of the overall lens, so that the overall structure remains miniaturized.

Further, when the optical lens 20 rises in the optical axis direction by the urging force of the elastic mechanism 40, it rises to some extent, abuts against the sleeve protrusion 3134, thereby restricting excessive movement of the lens, and when the lens is retracted to the initial state, the urging force is again applied to the upper end surface of the optical lens 20 through the sleeve protrusion 3134, so that the gap 23 between the first lens part 21 and the second lens part 22 is reduced, returning to the state of small height.

That is, when the camera module is in the working state, the light-transmitting cover plate 10 is driven by the movable sleeve 313 to move upwards by the first driving part 31, so that the distance between the lower end of the light-transmitting cover plate 10 and the upper end of the optical lens 20 is increased, so as to adjust the focal length of the optical lens 20. The optical lens 20 moves upward in the optical axis direction by the elastic mechanism 40, and the gap 23 between the first lens part 21 and the second lens part 22 is increased, further adjusting the focal length of the optical lens 20. When the first lens part 21 of the optical lens 20 moves upward to some extent, the upper end of the first lens part 21 abuts against the sleeve protrusion 3134. Accordingly, the lower end surface of the sleeve protrusion 3134 corresponds at least partially to the first barrel 211 of the first lens part 21, whereby the sleeve protrusion 3134 limits the moving distance of the first lens part 21, thereby preventing the first lens part 21 from excessively moving.

When the camera module is changed from the working state to the non-working state, the first driving part 31 of the camera module drives the light-transmitting cover plate 10 and the optical lens 20 to synchronously move downwards. The first driving element 312 of the first driving portion 31 drives the light-transmitting cover plate 10 to move downward in the optical axis direction through the movable sleeve 313, wherein the movable sleeve 313 is that the lower end of the sleeve protrusion 3134 is pressed against the upper end face of the optical lens 20, and drives the first lens part 21 of the optical lens 20 downward through the sleeve protrusion 3134, and the elastic mechanism 40 is compressed, thereby reducing the gap 23 between the first lens part 21 and the second lens part 22.

It should be noted that, the sleeve protrusion 3134 is used to abut against the upper end surface of the optical lens 20, so that a certain gap can be reserved for focusing the lens along the optical axis direction, and on the other hand, the sleeve protrusion 3134 can be used to play a role in buffering/anti-collision so as to prevent the lens from excessively moving under the action of the elastic mechanism 40, so as to avoid damaging the optical lens 20. In the preferred embodiment of the present invention, an iris 70 is further disposed on the end surface of the optical lens 20 and is sleeved on the upper end surface of the first lens assembly 21, the iris 70 includes an iris fixing portion, an iris blade, an iris driving portion and an iris electrical connection portion, the iris electrical connection portion is electrically connected to the outside, the iris blade is moved relative to the iris fixing portion by the effect of the iris driving portion, thereby changing the size of the aperture formed by the iris blade, and the amount of light passing into the optical lens 20 is adjusted by adjusting the size of the aperture covered on the optical lens 20, so as to compensate the amount of light entering the optical lens 20 required during near-focus shooting. It should be noted that in the preferred embodiment of the present invention, the iris diaphragm 20 may be used to cooperate with the driving action of the overall motor to optimize the performance of near-focus photographing.

It should be noted that, in the first driving portion 31, the first driving element 312 is used to drive the light-transmitting cover plate 10 to lift along the optical axis direction, and the elastic mechanism 40 between the split optical lenses 20 is used to adjust the gap 23 between the optical lenses 20. In the non-operating state, the elastic mechanism 40 between the first lens part 21 and the second lens part 22 is in a compressed state, and in the operating state, the first driving element 312 moves in the direction of the optical axis, so that the acting force applied to the end face of the optical lens 20 is reduced, the elastic force of the elastic mechanism 40 between the first lens part 21 and the second lens part 22 is released, and the gap 23 between the two optical lens 20 parts is pushed to increase to a TTL value satisfying imaging.

In this embodiment of the present invention, the elastic mechanism 40 is a combination of a guide rod and a spring, wherein the elastic mechanism and the sleeve protrusion are matched to realize smooth movement, and can provide an upward movement force for the lens when ensuring smooth movement of the lens. Since the sleeve protrusion 3134 can limit the movement of the optical lens 20, the excessive elastic force of the elastic mechanism 40 is prevented from affecting the imaging accuracy. The mode of combining the stepping motor with the elastic mechanism 40 to realize the extension and retraction of the camera module not only can solve the problem of high TTL of a large-size chip in imaging, but also can reduce the requirement on the driving force of the first driving element 312 by the arrangement of the elastic mechanism 40, and simplify the design of the whole driving structure. In the shooting process, the elastic mechanism 40 is used for adjusting the gap 23 between the first lens assembly 21 and the second lens assembly 22 to meet the TTL requirement of optical imaging, and the second driving part 32 is used for driving the optical lens 20 to move along the direction of the optical axis for focusing, so that a clearer image is obtained.

The first driving part 31 forms an external integral driving frame in which the main components imaged by the camera module are accommodated, and the second driving part 32, the elastic mechanism 40 and the iris 70 are also accommodated in the space of the first driving part 31.

The main driving element of the second driving part 32 is an AF motor, which can drive the optical lens 20 to move in the direction of the optical axis to achieve a focusing effect during photographing. The camera module further includes a third driving portion 60, wherein a main driving element of the third driving portion 60 is an OIS anti-shake component, which mainly drives the photosensitive chip to move along a direction perpendicular to the optical axis, so as to realize an anti-shake effect in the shooting process. Because of the limitation of the large-size chip, the corresponding optical lens 20 has a larger volume, if the traditional anti-shake method is adopted, that is, the corresponding anti-shake motor is arranged at the end of the optical lens 20, the driving force requirement for the driving motor is higher, the structural volume of the whole motor is increased, and the trend of miniaturization of the current module is not met, so that the anti-shake in shooting is realized by adopting the third driving part 60 in the preferred embodiment of the invention, and the miniaturization of the whole structure can be effectively realized.

In the shooting process, the gap between the first lens assembly 21 and the second lens assembly 22 is adjusted by using the elastic element so as to meet the TTL requirement of optical imaging, and meanwhile, the second driving part 32 is used for driving the optical lens to move along the direction of the optical axis, so that a clearer image is obtained.

In the working state, the first driving part 31 drives the light-transmitting cover plate 10 to move upwards along the optical axis direction, and forms the interval cavity 102 with adjustable gap between the light-transmitting cover plate 10 and the first lens assembly 21, so as to reserve enough activity space for the movement of the second driving part 32 for driving the optical lens 20. It should be noted that, in the preferred embodiment of the present invention, the step motor drives the light-transmitting cover plate 10 to lift along the direction of the optical axis, and the sleeve protrusion 3134 abutting against the upper end surface of the first optical lens 20 is matched with the elastic mechanism 40 between the first lens assembly 21 and the second lens assembly 22, so that the optical lens 20 moves upwards smoothly, and when the TTL to be imaged meets the imaging requirement of the large-size chip, the AF motor is used for focusing precisely.

In the imaging process, the elastic mechanism 40 drives the first lens assembly 21 to move under the driving action of elastic acting force, so that the first lens assembly 21 is separated from the second lens assembly 22, and a gap between the first lens assembly 21 and the second lens assembly 22 is increased, so that preliminary focusing of the imaging module is realized. And then the second driving portion 32 moves the optical lens 20, for example, the second driving portion 32 moves the first lens assembly 21 and/or the second lens assembly 22, so that the gap 23 between the first lens assembly 21 and the second lens assembly 22 is further adjusted, thereby realizing accurate focusing of the camera module, and being beneficial to improving the focusing accuracy and focusing speed of the camera module. It can be appreciated that, in the preliminary focusing process of the camera module, the elastic mechanism 40 drives the first lens assembly 21 to move, so that the movement speed is fast, and the preliminary focusing process can be realized as soon as possible. In the accurate focusing process of the camera module, the second driving part 32 moves the first lens assembly 21 and/or the second lens assembly 22 on the basis of preliminary focusing, so that the imaging accuracy of the camera module can be improved. Therefore, in the preferred embodiment of the present invention, the first lens assembly 21 is driven to move by the elastic mechanism 40 by moving the light-transmitting cover plate 10 through a stepping motor, so that preliminary focusing is achieved, and then precise focusing is achieved by the second driving part 32, so that the optical lens 20 of the camera module can be smoothly moved, thereby improving overall accuracy.

As shown in fig. 2A to 7B, the driving assembly 30 further includes a shift mechanism 33, wherein the shift mechanism 33 is disposed between the second driving portion 32 and the optical lens 20, and is used to limit excessive displacement of the first lens assembly 21 in the optical axis direction. In detail, the gear transmission mechanism 33 is connected to the elastic mechanism 40 at an inner side of the second driving part 32, and the first lens assembly 21 is supported by the gear transmission mechanism 33 and moves up and down along with the gear transmission mechanism 33.

When the camera module is in the working state, the elastic mechanism 40 drives the first lens assembly 21 and the second lens assembly 22 to be separated through the gear transmission mechanism 33, so that the interval of the gap 23 between the first lens assembly 21 and the second lens assembly 22 is increased. When the first lens assembly 21 is separated from the second lens assembly 22, the shift mechanism 33 limits the upward movement distance of the first lens assembly 21, so as to prevent the excessive spacing between the first lens assembly 21 and the second lens assembly 22.

The first lens assembly 21, the second lens assembly 22, the elastic mechanism 40 between the first lens assembly 21 and the second lens assembly 22, and the gear mechanism 33 for supporting and restraining the first lens assembly 21 are disposed inside the second driving portion 32. When the camera module is in a working state, the elastic mechanism 40 separates the first lens assembly 21 and the second lens assembly 22 from each other through the gear mechanism 33, and then drives the optical lens 20 to further move along the optical axis direction through the second driving portion 32 (i.e., the AF motor), so as to accurately adjust the focal length of the optical system. It will be appreciated that in this preferred embodiment of the invention, the second driving portion 32 may be used to drive the first lens assembly 21 of the optical lens 20 or to drive the first lens assembly 21 and the second lens assembly 22 to move synchronously.

In the working state, since the elastic mechanism 40 and the second driving part 32 drive the optical lens 20 to move upward along the optical axis direction, when the optical lens 20 moves upward to a specific position, the upper end surface of the first lens assembly 21 of the optical lens 20 is pressed against the sleeve protrusion 3134 of the movable sleeve 313, and the movement of the optical lens 20 is restricted by the sleeve protrusion 3134.

Accordingly, the gear shifting mechanism 33 includes a gear element 331 and a conductive element 332, wherein the gear element 331 is fixed in position, the first lens assembly 21 is disposed on the conductive element 332, and the first lens assembly 21 can move synchronously with the conductive element 332. The gear member 331 cooperates with the conductive member 332 to limit movement of the second drive portion 32. In the preferred embodiment of the present invention, the gear element 331 may be fixedly disposed at an end portion of the second barrel 221 of the second lens assembly 22, wherein an inside of the gear element 331 is a hollow structure, and wherein the conductive element 332 is sleeved inside the gear element 331. The conductive element 332 is inside the gear element 331 and is movable up and down relative to the gear element 331. The gear member 331 includes a gear body 3311 and at least one baffle 3312 extending integrally inward from the gear body 3311, wherein the baffle 3312 is adapted to limit excessive upward movement of the conductive member 332.

As shown in fig. 10, the conductive member 332 is disposed inside the gear member 331, the conductive member 332 includes a conductive main body 3321 and at least one conductive support post 3323, and the conductive member 332 is further provided with a through hole 3322 and a conductive receiving chamber 3324 communicating with the through hole 3322, wherein the conductive support post 3323 integrally extends upward from the conductive main body 3321 and the conductive support post 3323 form the conductive receiving chamber 3324. A part of the first lens assembly 21 is disposed in the conductive housing 3324 of the conductive element 332, and the first lens assembly 21 can move synchronously with the conductive element 332. The through hole 3322 is formed at an intermediate position of the conductive body 3321, wherein the size of the through hole 3322 is larger than the diameter of the bottom of the first lens assembly 21 so that the first lens assembly 21 can move in the optical axis direction within the through hole 3322 without interference. The conductive support column 3323 extends upward in the height direction along the outer side wall of the conductive body and supports the second driving part 32 by the conductive body 3321.

It will be appreciated that the conductive element 332 is a supporting frame structure having an opening at an upper end, wherein the conductive element 332 is drivingly connected to the elastic mechanism 40, the elastic mechanism 40 transmits the force through the conductive element 332, and the conductive element 332 drives the second driving portion 32 to move upward along the optical axis direction.

Accordingly, the conductive member 332 is further provided with a plurality of guide grooves 3320, wherein the plurality of guide grooves 3320 correspond to the guide bar 41 of the elastic mechanism 40, and the guide bar 41 and the spring 42 of the elastic mechanism 40 are inserted into the guide grooves 3320 of the conductive member 332.

It should be noted that, in the embodiment of the present invention, the groove structure corresponding to the baffle 3312 of the gear member 331 is formed between the conductive support posts 3323 of the conductive member 332, and when the conductive member 332 is driven to move up to a certain distance, the baffle 3312 of the gear member 331 blocks the conductive member 332 from moving up, so as to limit the moving distance of the conductive member 332 and thus limit the moving distance of the second driving portion 32.

As shown in fig. 10, the second driving part 32 includes a second driving element 321, a movable carrier 322, a fixed carrier 323, and a second electrical connection part, wherein the optical lens 20 is fixed to the movable carrier 322, and the second driving element 321 is disposed between the movable carrier 322 and the fixed carrier 323. Preferably, in the preferred embodiment of the present invention, the second driving element is an SMA element or a combined driving device of a magnet and a coil, and when the second driving element 321 is electrically connected to the power-on operation, the second driving element 321 drives the movable carrier 322 to move along the optical axis direction relative to the fixed carrier 323, so as to drive the optical lens 20 fixed thereto to move, so as to achieve the focusing effect of the optical lens 20 during the shooting process. Under the action of the elastic mechanism 40, the first lens assembly 21 is kept away from the second lens assembly 22, and the first optical lens 20 is clamped between the sleeve protrusion 3134 and the gear shifting mechanism 33 during the ascending along the optical axis direction, so that the flatness of the lens during the upward movement can be ensured, and the imaging precision is prevented from being influenced due to the inclination of the lens.

The third driving part 60 includes a chip anti-shake fixing part, a chip anti-shake movable part, and a third driving element, wherein the third driving element is mainly used for driving the photosensitive chip to move along a direction perpendicular to the optical axis, so as to realize shake correction in the imaging process. The chip anti-shake movable part is fixed with the photosensitive chip, the third driving element is connected with the chip anti-shake fixed part and the movable part, and under the action of the third driving element, when the chip anti-shake movable part moves relative to the chip anti-shake fixed part, the photosensitive chip can be driven to correspondingly move, so that shake correction in the shooting process is realized.

The photosensitive assembly part 200 comprises a circuit board 80, a photosensitive chip 71, a color filter bracket 72, a color filter 73 and a third electric connection part, wherein the large-size photosensitive chip provided by the application is arranged on the upper surface of the circuit board 80 and is connected with the circuit board 80 in a conducting way, in order to further reduce the height of the photosensitive assembly part 200, the application adopts a mode of punching holes on the circuit board, and a supporting plate is arranged on the bottom surface of the circuit board 80, and the supporting plate can be in a steel plate structure and is mainly used for enhancing the strength of the circuit board and ensuring the bonding flatness of the photosensitive chip. The photosensitive chip is arranged in the hollowed circuit board, wires and other electronic components connected between the photosensitive chip and the circuit board are molded in the circuit board in a mode of molding a bracket, the upper surface of the molded part is provided with a mounting seat of the color filter so as to mount the color filter on the color filter, one end of a third electric connection part is arranged on the circuit board, and the other end of the third electric connection part is connected with an external power supply device so as to provide current required by the operation of the internal components. The setting mode of the molding seat not only can reduce the height of the photosensitive component, but also can mold gold wires and other electronic components which are conducted by the circuit inside the molding seat so as to protect the corresponding electronic components.

In the preferred embodiment of the present invention, the light-transmitting cover plate 10 is lifted along the optical axis by the action of the driving element (i.e. the stepper motor) of the first driving part 31, and the elastic mechanism 40 between the optical lens 20 parts correspondingly stretches and contracts the elastic mechanism 40 between the optical lenses 20 during the lifting process of the light-transmitting cover plate 10 due to the action of the elastic mechanism 40 between the optical lens 20 parts, so that the gap between the optical lenses 20 in the working and non-working states is adjusted, thereby solving the contradiction between the imaging quality and the high TTL of the large-size photosensitive chip, providing possibility for imaging of the large-size chip, and catering for the development trend of the thinning of the camera module.

Referring to fig. 8 to 11B of drawings, an image pickup module according to a second preferred embodiment of the present invention is explained in the following description. Unlike the first preferred embodiment, in the preferred embodiment of the present invention, the second lens assembly 22 of the optical lens 20 is a fixed portion, which is fixed to the fixed base 317, the first lens assembly 21 is a movable lens, which is drivingly connected to the second driving portion 32 and the elastic mechanism 40, and the first lens assembly 21 is driven by the elastic mechanism 40 and the second driving portion 32 to move in the optical axis direction, respectively, so as to achieve precise focusing of the image capturing module.

The driving assembly 30 further comprises a gear mechanism 33, wherein the gear mechanism 33 is disposed between the first driving portion 31 and the second driving portion 32 for limiting the excessive displacement of the second driving portion 32 along the optical axis direction. In detail, the gear transmission mechanism 33 is connected to the elastic mechanism 40 at the inner side of the first driving part 31, and the second driving part 32 is disposed at the inner side of the gear transmission mechanism 33, and the second driving part 32 moves up and down along with the gear transmission mechanism 33.

The second driving section 32, an AF driving section, is provided outside the first lens assembly 21, and is drivingly connected to the first barrel 211 of the first lens assembly 21. The second driving portion 32 drives the first lens assembly 21 to move up and down in the optical axis direction. The elastic mechanism 40 is supported below the second driving portion 32 through the gear mechanism 33, wherein the elastic mechanism 40 drives the first lens assembly 21 to move along the optical axis direction through the gear mechanism 33.

It should be noted that, in the above-described first preferred embodiment of the present invention, the second driving section 32 is configured to optimize imaging by driving the optical lens 20 to move, while passing through the iris; in the second preferred embodiment of the present invention, the second driving part 32 is connected to the first lens assembly 21, and the second driving part 32 optimizes imaging by driving the first lens assembly 21 such that a gap between the first lens assembly 21 and the second lens assembly 22 varies with the movement of the first lens assembly 21.

By means of the elastic mechanism 40 between the first lens assembly 21 and the second lens assembly 22, the gap 23 between the first lens assembly 21 and the second lens assembly 22 meets the TTL requirement of imaging of a large-size chip in the working state under the action of the stepping motor in the first driving part 31. When the lens is not in operation, the light-transmitting cover plate 10 returns to the initial position along the direction of the optical axis by the driving of the stepping motor, in the process, the sleeve connected with the light-transmitting cover plate 10 abuts against the upper end surface of the first lens assembly 21, and the sleeve protrusion 3134 abuts against the upper end surface of the first lens assembly 21 under the action of the stepping motor, so that the elastic force of the elastic mechanism 40 between the two lens assemblies is overcome, the gap 23 between the two lenses is compressed, the gap 23 between the first lens assembly 21 and the second lens assembly 22 is reduced, and the lens returns to the state when not in operation, so that the overall height is kept small.

In the preferred embodiment of the present application, the second driving part 32 (AF driving structure) of the camera module is provided to the first lens assembly 21, and the focusing function during photographing is achieved by adjusting the first lens assembly 21. Unlike the first embodiment described above, the variable aperture element can be reduced, and the second driving element moves the first lens assembly 21 along the optical axis direction, so that not only the focusing effect in the photographing process can be achieved, but also the problem of near-focus photographing can be effectively solved, instead of the variable aperture effect in the first application. The AF driving part is only arranged on the first lens assembly 21, so that the requirement on the driving force of the AF motor can be effectively reduced while the focusing function in the shooting process is realized, and the design of a driving structure is simplified.

Unlike the first preferred embodiment described above, in this preferred embodiment of the present invention, the sleeve protrusion 3134 of the movable sleeve 313 of the first driving part 31 extends downward from above, and the lower end of the sleeve protrusion 3134 is pressed against the upper end of the second driving part 32. When the camera module is switched from the working state to the non-working state, the movable sleeve 313 of the first driving part 31 is pressed downwards against the second driving part 32 through the sleeve protrusion 3134, and the second driving part 32 drives the first lens assembly 21 to synchronously move downwards.

Preferably, in this preferred embodiment of the invention, the movable sleeve 313 of the first driving part 31 and the housing part of the second driving part 32 may be connected as a unitary structure. That is, in the preferred embodiment of the present invention, the sleeve protrusion 3134 of the movable sleeve 313 of the first driving part 31 is drivingly connected with the second driving part 32, which is movable in synchronization with the movement of the movable sleeve 313.

When the camera module is in the working state, the elastic mechanism 40 drives the first lens assembly 21 and the second lens assembly 22 to be separated through the gear transmission mechanism 33, so that the interval of the gap 23 between the first lens assembly 21 and the second lens assembly 22 is increased. When the first lens assembly 21 is separated from the second lens assembly 22, the shift mechanism 33 limits the distance that the first lens assembly 21 moves upward to prevent the interval between the first lens assembly 21 and the second lens assembly 22 from being too large.

Accordingly, the gear shifting mechanism 33 includes a gear member 331 and a conductive member 332, wherein the gear member 331 is fixed in position, the second driving portion 32 is disposed on the conductive member 332, and the second driving portion 32 is synchronously movable with the conductive member 332. The gear member 331 cooperates with the conductive member 332 to limit movement of the second drive portion 32. In the preferred embodiment of the present invention, the gear member 331 may be fixedly disposed on the inner side wall of the fixing base 317 to extend upward, wherein the inside of the gear member 331 is a hollow structure, and the conductive member 332 is sleeved on the inside of the gear member 331. The conductive element 332 is inside the gear element 331 and is telescopically movable up and down with respect to the gear element 331. The gear member 331 includes a gear body 3311 and at least one baffle 3312 extending integrally inward from the gear body 3311, wherein the baffle 3312 is adapted to block excessive upward movement of the conductive member 332.

The conductive element 332 is disposed inside the gear element 331, the conductive element 332 includes a conductive main body 3321 and at least one conductive support post 3323, and the conductive element 332 is further provided with a through hole 3322 and a conductive receiving cavity 3324 communicating with the through hole 3322, wherein the conductive support post 3323 integrally extends upward from the conductive main body 3321 and the conductive support post 3323 form the conductive receiving cavity 3324. The second driving portion 32 is disposed in the conductive receiving cavity 3324 of the conductive element 332, and the second driving portion 32 is synchronously movable with the conductive element 332. The through hole 3322 is formed at an intermediate position of the conductive body 3321, wherein the size of the through hole 3322 is larger than the diameter of the bottom of the first lens assembly 21 so that the first lens assembly 21 can move in the optical axis direction within the through hole 3322 without interference. The conductive support column 3323 extends upward in the height direction along the outer side wall of the conductive body and supports the second driving part 32 by the conductive body 3321.

It should be noted that, in the preferred embodiment of the present invention, the groove structure of the baffle 3312 corresponding to the gear member 331 is formed between the conductive support posts 3323 of the conductive member 332, and when the conductive member 332 is driven to move up to a certain distance, the baffle 3312 of the gear member 331 blocks the conductive member 332 from moving up, limiting the moving distance of the conductive member 332 and thus limiting the moving distance of the second driving portion 32.

In the preferred embodiment of the present invention, therefore, the contradiction between the imaging quality of the large-sized chip and the height thereof is solved by providing the first driving part 31, and the size of the gap 23 between the first lens assembly 21 and the second lens assembly 22 is adjusted by using the first driving part 31 capable of driving the light-transmitting cover plate 10 to move up and down in the operating state so as to satisfy the TTL requirement of optical imaging, and the gap 23 between the first optical lens assembly 20 and the second lens assembly 22 is compressed in the non-operating state so as to reduce the height of the whole module. In the module main body part, the AF driving device is utilized to realize the focusing effect in the shooting process so as to obtain a clearer image, and the anti-shake device of the photosensitive chip is utilized to realize shake correction in the shooting process so as to obtain a picture with higher imaging quality.

The design mode of the camera shooting module not only can solve the problem of integral height in the imaging process of a large-size chip, but also can effectively improve the imaging quality of the camera shooting module, and compared with the single-lens telescopic mode, the waterproof and dustproof capacity is further improved, meanwhile, the optical lens 20 is arranged in the first driving part, so that the optical lens 20 can be effectively protected, the stability of the integral structure can be ensured, the anti-falling capacity of the integral structure is improved, meanwhile, the development trend of lightening and thinning of terminal equipment is highly met, and the experience satisfaction degree of a user can be further increased.

An electronic device according to another aspect of the present invention is illustrated in the following description with reference to fig. 12 of the drawings accompanying the present specification. The electronic device includes an electronic device main body 1000 and at least one camera module 2000 disposed on the electronic device main body 1000, wherein the camera module 2000 has the same structure and function as the telescopic module in the above preferred embodiment. The image capturing module 2000 is mounted on the electronic device main body 1000, and may be used as a front image capturing lens or a rear image capturing lens of the electronic device. Alternatively, in the preferred embodiment of the present invention, the electronic device may be, but is not limited to, a mobile phone, a computer, a tablet computer, and other photographing devices having photographing functions, such as a smart wearable device, a monitoring device, and the like.

Referring to fig. 13 of the drawings, a focusing method of an image pickup module according to another aspect of the present invention is set forth in the following description. The focusing method of the camera module comprises the following steps:

(a) Driving a light-transmitting cover plate 10 to move upwards along the optical axis direction by a first driving part 31, wherein a first lens component 21 of the optical lens 20 is acted on along the optical axis direction by an elastic mechanism 40 to perform primary focusing on the camera module; and

(b) The optical lens 20 is driven to further move along the optical axis direction by a second driving portion 32, so as to achieve precise focusing of the image capturing module.

In step (a) of the focusing method of the image capturing module, in an operating state, the first driving portion 31 drives the light-transmitting cover plate 10 to move along the optical axis direction, so that a variable-distance spacer cavity 102 is formed between the light-transmitting cover plate 10 and the first lens assembly 21, so as to adjust the position of the optical lens 20.

In the focusing method of the camera module, in step (a), the optical lens 20 further includes a second lens assembly 22, and a space 23 is provided between the first lens assembly 21 and the second lens assembly 22, and the first lens assembly 21 is driven to move relative to the second lens assembly 22 by the elastic mechanism 40 to change the space 23.

In step (a) of the focusing method of the camera module, wherein the first driving part 31 includes a movable sleeve 313, wherein the light-transmitting cover plate 10 is disposed on the movable sleeve 313, the light-transmitting cover plate 10 is supported by the movable sleeve to move in the optical axis direction, and in the rest state, a sleeve protrusion 3134 of the movable sleeve 313 is pressed against the upper end of the first lens assembly 21, and the space 23 between the first lens assembly 21 and the second lens assembly 22 is compressed by the sleeve protrusion 3134.

In step (a) of the focusing method of the camera module, wherein the first driving portion 31 includes a movable sleeve 313, wherein the light-transmitting cover plate 10 is disposed on the movable sleeve 313, the light-transmitting cover plate 10 is supported by the movable sleeve to move in the optical axis direction, and in the rest state, a sleeve protrusion 3134 of the movable sleeve 313 is pressed against an upper end of the second driving portion 32, and the space 23 between the first lens assembly 21 and the second lens assembly 22 is compressed by the sleeve protrusion 3134 through the second driving portion 32.

In step (b) of the focusing method of the image pickup module, the second driving portion 32 acts on the optical lens 20, and the optical lens 20 is driven to move in the optical axis direction by the second driving portion 32.

In step (b) of the focusing method of the image pickup module, wherein the second driving portion 32 acts on the first lens assembly 21 of the optical lens 20, and drives the first lens assembly 21 to move in the optical axis direction by the second driving portion 32, the image pickup module is further focused by adjusting a gap between the first lens assembly 21 and the second lens assembly 22.

Alternatively, in the step (b) of the focusing method of the image pickup module, the second driving part 32 acts on the optical lens 20, and drives the first lens assembly 21 and the second lens assembly 22 to move in the optical axis direction by the second driving part 32, further focusing the image pickup module.

Preferably, in the preferred embodiment of the present invention, the first driving part 31 includes a first driving element 312, wherein the first driving element 312 is a stepper motor.

Preferably, the driving assembly 30 of the camera module further includes a gear mechanism 33, wherein the gear mechanism 33 is disposed between the first driving portion 31 and the second driving portion 32, and the gear mechanism 33 is drivingly connected to the elastic mechanism 40, the elastic mechanism 40 ejects the first lens assembly 21 through the gear mechanism 33, and the gear mechanism 33 limits the moving distance of the optical lens 20.

Preferably, the driving assembly 30 of the camera module further includes a gear mechanism 33, wherein the gear mechanism 33 is disposed inside the second driving portion 32, and the gear mechanism 33 is drivingly connected to the elastic mechanism 40, the elastic mechanism 40 ejects the first lens assembly 21 through the gear mechanism 33, and the gear mechanism 33 limits the moving distance of the first lens assembly 21.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.

Claims

1. The utility model provides a telescopic lens is suitable for a module of making a video recording, its characterized in that, the telescopic module includes:

a light-transmitting cover plate;

2. The retractable lens according to claim 1, further comprising an elastic mechanism, wherein the elastic mechanism is disposed between the first lens component and the second lens component, and when the first lens component moves toward the spacing cavity under the action of the elastic mechanism during primary focusing, a gap between the first lens component and the second lens component increases.

3. The retractable lens of claim 2, wherein the elastic mechanism comprises a guide rod fixedly disposed on the second lens component and a spring telescopically disposed on the guide rod, wherein the first lens component is acted upon by the elastic mechanism.

4. The retractable lens according to claim 2, wherein the elastic mechanism comprises a guide rod fixedly provided to the first driving portion and a spring retractably provided to the guide rod, wherein the first lens assembly is driven by the elastic mechanism.

5. The retractable lens according to claim 3, wherein the driving assembly further comprises a shift mechanism, wherein the shift mechanism is disposed between the first driving portion and the second driving portion, and the shift mechanism is connected to the elastic mechanism, and the shift mechanism is configured to restrict displacement of the first lens assembly in the optical axis direction.

6. The retractable lens according to claim 4, wherein the driving assembly further comprises a shift mechanism, wherein the shift mechanism is disposed between the second driving portion and the optical lens, and the shift mechanism is connected to the elastic mechanism, the shift mechanism being configured to restrict displacement of the first lens assembly in the optical axis direction.

7. The retractable lens according to claim 5 or 6, wherein the gear shift mechanism comprises a gear member and a conductive member, wherein the gear member is fixed in position, the first lens assembly is connected to the conductive member and is connected to the elastic mechanism through the conductive member, wherein the gear member has a hollow structure, and the conductive member is sleeved on the inner side of the gear member and limits the moving distance of the conductive member by the gear member.

8. The retractable lens according to claim 7, wherein said gear member comprises a gear body and at least one baffle extending integrally inward from said gear body, wherein said baffle is for blocking upward movement of said conductive member.

9. The retractable lens according to claim 8, wherein the conductive element is disposed inside the gear element, the conductive element comprising a conductive body and at least one conductive post, wherein the conductive post extends integrally upward from the conductive body.

10. The retractable lens according to claim 7, wherein the first driving portion includes a first driving element, a movable sleeve, and a fixed base, wherein the driving element is provided to the fixed base, the first driving element is drivingly connected to the movable sleeve, and the movable sleeve is driven to move up and down in the optical axis direction by the first driving element.

11. The retractable lens according to claim 10, wherein the first driving element comprises a driving mechanism and a transmission mechanism, wherein the transmission mechanism is drivingly connected to the driving mechanism and the movable sleeve, the transmission mechanism is driven by the driving mechanism, and the movable sleeve is driven to move up and down in the optical axis direction by the transmission mechanism.

12. The retractable lens of claim 11, wherein the first driving element is a stepper motor.

13. The retractable lens according to claim 11, wherein the transmission mechanism further comprises a first gear, a second gear, and a transmission screw, wherein the first gear and the second gear are pivotably provided to the fixed base, the first gear is provided to the first driving element, and the first gear is rotatable in synchronization with the first driving element, the first gear and the second gear are engaged, one end of the transmission screw is fixed to the second gear, and the other end of the transmission screw is drivingly connected to the movable sleeve.

14. The retractable lens according to claim 11, wherein the movable sleeve comprises a sleeve body, a sleeve movable portion, a sleeve supporting portion, and a sleeve projection, wherein an opening is provided on an upper surface of the sleeve supporting portion, the light-transmitting cover plate is provided at the opening thereof, and the sleeve movable portion is movable along a guide rod direction parallel to the optical axis.

15. The retractable lens according to claim 14, wherein the sleeve protrusion is located at a lower end of the sleeve support portion, and the sleeve protrusion integrally extends downward from the sleeve support portion.

16. The retractable lens according to claim 15, wherein the sleeve protrusion corresponds to an upper end of the second driving portion, and in an inactive state, the sleeve protrusion is pressed against the upper end of the second driving portion and presses the first lens assembly downward through the second driving portion, so that the elastic mechanism is compressed.

17. The retractable lens according to claim 15 or 16, wherein the first driving portion further comprises a driving housing and a waterproof and dustproof cover, wherein the driving housing covers the outside of the optical lens, one end of the waterproof and dustproof cover is disposed on the driving housing, and the other end of the waterproof and dustproof cover is connected with the sleeve movable portion.

18. The retractable lens according to claim 17, wherein the first driving portion further comprises at least one guide member, wherein the at least one guide member is disposed on the fixed base along the direction of the optical axis, the guide member comprising a main guide bar and a sub guide bar, wherein the main guide bar and the sub guide bar are located at two diagonal positions of the fixed base.

19. The module of making a video recording, its characterized in that includes:

the retractable lens according to any one of claims 1 to 18; and

20. The adjusting method of the camera module is characterized by comprising the following steps:

(a) The first driving part drives a light-transmitting cover plate to move upwards along the optical axis direction, wherein the first lens component of the optical lens is acted by an elastic mechanism along the optical axis direction so as to perform preliminary adjustment on the camera module; and

21. The adjustment method according to claim 20, wherein in the step (a) of the adjustment method of the image pickup module, wherein in an operating state, the first driving portion drives the light-transmitting cover plate to move in the optical axis direction, so that a space cavity with a variable distance is formed between the light-transmitting cover plate and the first lens assembly, so as to adjust the position of the optical lens.

22. The adjustment method according to claim 21, wherein in the step (a) of the adjustment method of the camera module, the optical lens further comprises a second lens assembly, and there is a space between the first lens assembly and the second lens assembly, and the first lens assembly is driven to move by the elastic mechanism to change the space.