Telescopic components, telescopic camera modules, and lens telescopic methods

Abstract

This invention provides a telescopic component, a telescopic camera module, and a lens telescopic method. The telescopic component includes at least one driving element and a transmission device, wherein the transmission device is driveably connected to the at least one driving element. The transmission device includes a fixed mechanism and a movable mechanism, wherein the movable mechanism is helically and drively connected to the fixed mechanism. The driving element drives the fixed mechanism to generate a movement tendency perpendicular to the optical axis, wherein the movable mechanism converts the movement tendency of the fixed mechanism into a helical and up-and-down movement along the optical axis, thereby driving the optical lens to move up and down along the optical axis.

Description

Technical Field

[0001] This invention relates to the field of optical imaging technology, and more particularly to a telescopic component, a telescopic camera module, and a lens telescopic method. Background Technology

[0002] With the widespread adoption of mobile electronic devices, the technology related to camera modules (used to acquire images, such as video or photos) used in these devices has developed rapidly. In recent years, camera modules have been widely used in numerous fields, including medical, security, and industrial production. Recently, the development of mobile communication technology has led to the proliferation of portable terminals such as smartphones, resulting in miniaturized and lightweight camera modules. Therefore, portable terminals typically include at least one camera module. To meet increasingly diverse market demands, high pixel counts and high frame rates are irreversible development trends for existing camera modules.

[0003] Currently, with market demand, mobile phone terminals are generally equipped with camera modules that need to achieve multi-zoom shooting. Generally speaking, multi-zoom shooting requires at least one telephoto module to achieve this. As the magnification increases, the total focal length of the telephoto module will also increase, which makes the height of the camera module increase.

[0004] To address the height issue, most current solutions employ periscope modules, which reduce height by altering the optical path using light-converting elements. However, periscope modules are relatively expensive and difficult to assemble, making them unsuitable for some camera modules. Conversely, avoiding periscope modules would result in excessively large modules, failing to meet the requirements of terminal devices. Summary of the Invention

[0005] A key advantage of this invention is that it provides a telescopic component, a telescopic camera module, and a lens telescopic method, wherein the telescopic camera module achieves multi-zoom functionality through a telescopic lens.

[0006] Another advantage of the present invention is that it provides a telescopic component, a telescopic camera module, and a lens telescopic method, wherein the telescopic statue module includes a telescopic component that drives the lens to move along the optical axis to achieve multiple zoom of the telescopic camera module.

[0007] Another advantage of the present invention is that it provides a telescopic component, a telescopic camera module, and a lens telescopic method, wherein the telescopic component of the telescopic camera module is small in size, which meets the height requirements of terminal electronic devices for camera modules.

[0008] Another advantage of the present invention is that it provides a telescopic component, a telescopic camera module, and a lens telescopic method, wherein a driving element of the telescopic component is a piezoelectric element, which drives the movement of the motor and the optical lens, and has a large focusing range and a stable focusing process.

[0009] Another advantage of the present invention is that it provides a telescopic component, a telescopic camera module, and a lens telescopic method, wherein the telescopic component is provided with a spiral track, and the lens is raised or lowered by rotation, which helps to maintain stability during focusing.

[0010] Another advantage of the present invention is that it provides a telescopic component, a telescopic camera module, and a lens telescopic method, wherein the telescopic component includes a ball bearing, and the rolling of the ball bearing can prevent the lens or motor from rotating during the rising or falling process, thereby improving the stability of the focusing process.

[0011] According to one aspect of the present invention, a telescopic component of the present invention, capable of achieving the foregoing and other objects and advantages, is adapted to a telescopic camera module, the telescopic camera module further including an optical lens, the telescopic component comprising:

[0012] At least one driving element; and

[0013] A transmission device, wherein the transmission device is driveably connected to the at least one driving element, the transmission device includes a fixed mechanism and a movable mechanism, wherein the movable mechanism is helically and driveably connected to the fixed mechanism, the driving element drives the fixed mechanism to generate a motion tendency perpendicular to the optical axis, wherein the movable mechanism converts the motion tendency of the fixed mechanism into a helical and up-and-down motion along the optical axis, thereby driving the optical lens to move up and down along the optical axis.

[0014] The movable mechanism of the transmission device is located inside the fixed mechanism, the driving element is located outside the fixed mechanism, and the movable mechanism, the fixed mechanism, and the driving element are closely fitted together.

[0015] According to one embodiment of the present invention, the movable mechanism of the transmission device is located outside the fixed mechanism, the driving element is located inside the fixed mechanism, and the movable mechanism, the fixed mechanism, and the driving element are closely fitted together.

[0016] According to one embodiment of the present invention, the fixed mechanism is provided with a spiral guide rail, and the movable mechanism is provided with a track groove that matches the fixed mechanism, so that the movable mechanism can convert the motion tendency of the fixed mechanism into a spiral motion along the optical axis.

[0017] According to one embodiment of the present invention, it further includes at least one ball bearing, wherein the at least one ball bearing is rotatably disposed on the movable mechanism, thereby reducing friction between the movable mechanism and the optical lens by the ball bearing rotating on its own.

[0018] According to one embodiment of the present invention, a retaining mechanism is further included, the retaining mechanism comprising a fixed component and a movable component, wherein the fixed component restricts the movement direction of the movable component, allows the movable component to move along the optical axis direction, and prevents the movable component from moving in other directions, thereby the retaining mechanism restricts the optical lens from moving up and down along the optical axis direction.

[0019] According to one embodiment of the present invention, the fixed component of the holding mechanism is fixed to the outside of the driving element, and the movable component is located outside the fixed component, thereby the optical lens drives the movable component of the holding mechanism, and the fixed component restricts the movement direction of the optical lens through the movable component.

[0020] According to one embodiment of the present invention, the holding mechanism is disposed inside the transmission device, and the movable mechanism of the transmission device is connected in a driving manner to the movable component of the holding mechanism. The movable mechanism drives the movable component of the holding mechanism to move up and down along the optical axis, thereby the fixed component restricts the movement direction of the optical lens through the movable component.

[0021] According to one embodiment of the present invention, the holding mechanism is disposed on the outside of the transmission device, and the movable mechanism of the transmission device is connected in a driving manner to the movable component of the holding mechanism. The movable mechanism drives the movable component of the holding mechanism to move up and down along the optical axis, thereby the fixed component restricting the movement direction of the optical lens through the movable component.

[0022] According to one embodiment of the present invention, the driving element is a piezoelectric ceramic motor.

[0023] According to another aspect of the present invention, the present invention further provides a retractable camera module, comprising:

[0024] One photosensitive component;

[0025] An optical lens, wherein the optical lens is positioned within the light-sensitive path of the photosensitive element; and

[0026] A telescopic assembly, wherein the optical lens is tractably disposed on the telescopic assembly, and the telescopic assembly drives the optical lens to move up and down along the optical axis, wherein the telescopic assembly includes:

[0027] At least one driving element; and

[0028] A transmission device, wherein the transmission device is driveably connected to the at least one driving element, the transmission device includes a fixed mechanism and a movable mechanism, wherein the movable mechanism is helically and driveably connected to the fixed mechanism, the driving element drives the fixed mechanism to generate a movement tendency perpendicular to the optical axis, wherein the movable mechanism converts the movement tendency of the fixed mechanism into a helical and up-and-down movement along the optical axis, and the movable mechanism drives the optical lens to move up and down along the optical axis to adjust the relative positional relationship between the optical lens and the photosensitive component.

[0029] According to one embodiment of the present invention, the movable mechanism of the transmission device is located inside the fixed mechanism, the driving element is located outside the fixed mechanism, and the movable mechanism, the fixed mechanism, and the driving element are closely fitted together.

[0030] According to one embodiment of the present invention, the movable mechanism of the transmission device is located outside the fixed mechanism, the driving element is located inside the fixed mechanism, and the movable mechanism, the fixed mechanism, and the driving element are closely fitted together.

[0031] According to one embodiment of the present invention, the fixed mechanism is provided with a spiral guide rail, and the movable mechanism is provided with a track groove that matches the fixed mechanism, so that the movable mechanism can convert the motion tendency of the fixed mechanism into a spiral motion along the optical axis.

[0032] According to one embodiment of the present invention, the telescopic component further includes at least one ball bearing, wherein the at least one ball bearing is rotatably disposed on the movable mechanism, thereby reducing friction between the movable mechanism and the optical lens by the ball bearing rotating on its own.

[0033] According to one embodiment of the present invention, the telescopic assembly further includes a retaining mechanism, the retaining mechanism including a fixed component and a movable component, wherein the fixed component restricts the movement direction of the movable component, allows the movable component to move along the optical axis direction, and prevents the movable component from moving in other directions, thereby the retaining mechanism restricts the optical lens from moving up and down along the optical axis direction.

[0034] According to one embodiment of the present invention, the fixed component of the holding mechanism is fixed to the outside of the driving element, and the movable component is located outside the fixed component, thereby the optical lens drives the movable component of the holding mechanism, and the fixed component restricts the movement direction of the optical lens through the movable component.

[0035] According to one embodiment of the present invention, the holding mechanism is disposed inside the transmission device, and the movable mechanism of the transmission device is connected in a driving manner to the movable component of the holding mechanism. The movable mechanism drives the movable component of the holding mechanism to move up and down along the optical axis, thereby the fixed component restricts the movement direction of the optical lens through the movable component.

[0036] According to one embodiment of the present invention, the holding mechanism is disposed on the outside of the transmission device, and the movable mechanism of the transmission device is connected in a driving manner to the movable component of the holding mechanism. The movable mechanism drives the movable component of the holding mechanism to move up and down along the optical axis, thereby the fixed component restricting the movement direction of the optical lens through the movable component.

[0037] According to one embodiment of the present invention, the driving element is a piezoelectric ceramic motor.

[0038] According to one embodiment of the present invention, the photosensitive assembly includes a circuit board and a photosensitive chip, wherein the driving element, the fixing mechanism of the transmission device, and the fixing component of the holding mechanism are fixed to the circuit board of the photosensitive assembly.

[0039] According to one embodiment of the present invention, it further includes a motor and a support mechanism, wherein the optical lens is disposed on the motor, the motor and the optical lens are disposed on the support mechanism, and the support mechanism is tractably connected to the movable mechanism of the transmission device.

[0040] According to another aspect of the present invention, the present invention further provides a lens extension method for a camera module, wherein the lens extension method for the camera module includes the following steps:

[0041] (a) An external excitation is applied to a driving element, causing the driving element to deform under the action of the external excitation;

[0042] (b) A fixing mechanism for driving a transmission device that is driveably connected to the driving element, wherein the driving element is closely connected to the fixing mechanism, and the deformation of the driving element causes the fixing mechanism to generate a motion tendency perpendicular to the optical axis; and

[0043] (c) The motion tendency of the fixed mechanism is transmitted to a movable mechanism of the transmission device, which converts the motion tendency of the fixed mechanism into a spiral up-and-down motion along the optical axis, thereby driving an optical lens to move up and down.

[0044] According to one embodiment of the present invention, the driving element is a piezoelectric ceramic motor, wherein the piezoelectric ceramic motor has the characteristic of being able to expand and contract with the applied voltage value.

[0045] According to an embodiment of the present invention, the lens extension method of the camera module further includes: driving a retaining mechanism, wherein the retaining mechanism is fixedly connected to the optical lens, and the retaining mechanism restricts the movement of the optical lens along the optical axis.

[0046] The further objects and advantages of the invention will become fully apparent from the following description and accompanying drawings.

[0047] These and other objects, features and advantages of the present invention will become fully apparent from the following detailed description and accompanying drawings. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the structure of a telescopic camera module according to a first preferred embodiment of the present invention.

[0049] Figure 2A and Figure 2B This is a schematic diagram illustrating the movement of a telescopic component of the telescopic camera module according to the first preferred embodiment of the present invention.

[0050] Figure 3 This is a schematic diagram of the structure of a telescopic camera module according to a second preferred embodiment of the present invention.

[0051] Figure 4 This is a structural schematic diagram of a telescopic camera module according to a third preferred embodiment of the present invention.

[0052] Figure 5 This is a schematic diagram of a method for extending and retracting a lens of a telescopic camera module according to another preferred embodiment of the present invention. Detailed Implementation

[0053] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0054] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0055] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0056] Referring to the accompanying drawings of this invention Figures 1 to 2B As shown, a retractable camera module according to a first preferred embodiment of the present invention will be described below. The retractable camera module includes a photosensitive component 10, an optical lens 20 held on the photosensitive path of the photosensitive component 10, and a retractable component 30. The retractable component 30 is fixed to the photosensitive component 10, transversely connected to the optical lens 20, and drives the optical lens 20 to move along an optical axis. That is, the retractable component 30, with the photosensitive component 10 as a supporting position, drives the optical lens 20 to move up and down along the optical axis, adjusting the relative positional relationship between the optical lens 20 and the photosensitive component 10 to achieve multi-zoom capability of the retractable camera module.

[0057] Accordingly, the optical lens 20 includes a lens barrel and at least one optical lens (not shown) mounted within the lens barrel. Preferably, the optical lens 20 includes multiple optical lenses. More preferably, the effective focal length of the optical lens 20 ranges from 19 mm to 29 mm. Preferably, it ranges from 27 mm to 29 mm.

[0058] In this preferred embodiment of the invention, the telescopic camera module further includes a motor 40, wherein the motor 40 is driveably connected to the optical lens 20, and the motor 40 drives the optical lens 20 to move along the optical axis. The motor 40 is disposed outside the optical lens 20, and the motor 40 and the optical lens 20 can be connected as a whole to the telescopic assembly 30, and the telescopic assembly 30 drives the motor 40 and the optical lens 20 to move.

[0059] The photosensitive assembly 10 includes a circuit board 11, a photosensitive chip 12, a bracket 13, at least one filter element, and at least one electronic component (not shown in the figure). In other optional embodiments of the present invention, the photosensitive assembly 10 may also include a molded body that covers the electronic component (MOB); the molded body covers a portion of the photosensitive area (MOC) of the photosensitive chip. The circuit board 11 serves as the mounting substrate of the photosensitive assembly 10, wherein the photosensitive chip 12 is electrically connected to the circuit board 11. The filter element includes a filter, wherein the filter is mounted on the bracket 13, and the bracket 13 may be selectively mounted with adhesive to any one of the circuit board 11, the molded body, and the non-photosensitive area of ​​the photosensitive chip 12.

[0060] The telescopic assembly 30 includes at least one driving element 31 and a transmission device 32, wherein the driving element 31 is driveably connected to the transmission device 32, the driving element 31 drives the transmission device 32, and the transmission device 32 then moves the optical lens 20. The transmission device 32 includes a fixing mechanism 321 and a movable mechanism 322 connected to the fixing mechanism 321 and movable relative to the fixing mechanism 321 along the optical axis, wherein the position of the fixing mechanism 321 of the transmission device 32 is fixed. The driving element 31 drives the movable mechanism 322 to move along the optical axis through the fixing mechanism 321 of the transmission device 32, and the movable mechanism 322 then moves the optical lens 20. Preferably, in this preferred embodiment of the present invention, the fixing mechanism 321 of the transmission device 32 is fixed to the photosensitive component 10, and the moving mechanism 322 of the transmission device 32 is driven to move by the driving element 31, and then the moving mechanism 322 drives the optical lens 20 to move, so as to realize the adjustment of the relative positional relationship between the optical lens 20 and the photosensitive component 10, that is, to realize the multi-zoom of the telescopic camera module.

[0061] like Figure 1 As shown, the movable mechanism 322 of the transmission device 32 is located inside the fixed mechanism 321, and the driving element 31 is located outside the fixed mechanism 321. That is, the movable mechanism 322, the fixed mechanism 321, and the driving element 31 of the transmission device 32 are arranged from the inside to the outside in the direction of the optical axis, and the movable mechanism 322, the fixed mechanism 321, and the driving element 31 are closely fitted together.

[0062] Preferably, the central axis of the movable mechanism 322, the central axis of the fixing mechanism 321, the central axis of the driving element 31, and the central axis of the photosensitive chip 12 coincide with the optical axis. The telescopic component 30 is located on the photosensitive path of the photosensitive chip 12. The driving element 31 and the fixing mechanism 321 are mounted on the circuit board 11 of the photosensitive component 10, and the driving element 31 and the circuit board 11 are electrically connected. That is, in this preferred embodiment of the present invention, the driving element 31 and the transmission device 32 are fixed to the circuit board 11 of the photosensitive component 10 and supported by the photosensitive component 10. Optionally, in other alternative embodiments of the present invention, the driving element 31 and the transmission device 32 are fixed to a base or a molded body, etc. Therefore, the fixed position of the driving element 31 and the transmission device 32 is merely exemplary and not limiting.

[0063] The driving force of the telescopic component 30 is provided by the driving element 31, which is a piezoelectric motor. The driving element 31 is preferably a piezoelectric ceramic motor, which has the characteristic of being able to expand and contract according to the applied voltage value. By applying an external excitation to the piezoelectric ceramic motor, the piezoelectric ceramic motor generates an inverse piezoelectric effect, thereby causing the piezoelectric ceramic motor to deform. This deformation causes the fixed mechanism 321 to have a tendency to move perpendicular to the optical axis. This tendency is transmitted to the movable mechanism 322 through contact, causing the movable mechanism 322 to generate relative movement.

[0064] Preferably, the fixed mechanism 321 and the movable mechanism 322 of the transmission device 32 are helically and sequentially connected. The fixed mechanism 321 is deformed by the driving element 31 to generate a motion tendency perpendicular to the optical axis, wherein the motion tendency of the fixed mechanism 321 drives the movable mechanism 322 to generate a circumferential rotational motion around the optical axis.

[0065] It is worth mentioning that, in this preferred embodiment of the present invention, the fixing mechanism 321 and the moving mechanism 322 of the transmission device 32 are in close contact with each other, so that when the driving element 31 drives the transmission device 32, the fixing mechanism 321 of the transmission device 32 converts the motion tendency perpendicular to the optical axis direction into the motion of the moving mechanism 322 spiraling upward or spiraling downward along the optical axis direction.

[0066] Correspondingly, the fixing mechanism 321 is provided with a spiral guide rail 3211, and the movable mechanism 322 is provided with a track groove 3221 that matches the fixing mechanism 321. Through the cooperation of the protruding and recessed structures of the fixing mechanism 321 and the movable mechanism 322, when the outer fixing mechanism 321 generates a force with a clockwise rotational tendency, the inner movable mechanism 322 generates a spiral upward movement under the guidance of the guide rail. When the outer fixing mechanism 321 generates a force with a counterclockwise rotational tendency, the inner movable mechanism 322 generates a spiral downward movement under the guidance of the guide rail. Preferably, in this preferred embodiment of the present invention, the guide rail 3211 of the fixing mechanism 321 protrudes outward, and the track groove 3221 of the movable mechanism 322 is a groove adapted to the guide rail 3211.

[0067] like Figure 1 As shown, the telescopic camera module further includes a support mechanism 50. The motor 40 and the optical lens 20 are disposed on the support mechanism 50, and the support mechanism 50 is disposed on the telescopic assembly 30 and is drively connected to the telescopic assembly 30. The motor 40 and the optical lens 20 are supported by the support mechanism 50. The support mechanism 50 has a support space 501 and an entrance opening and an exit through-hole communicating with the support space 501, allowing light to enter the support space 501 through the entrance opening and exit through the exit through-hole. The motor 40 and the optical lens 20 are held in the support space 501 by the support mechanism 50.

[0068] The supporting mechanism 50 includes a supporting end 51 and a supporting end 52 extending integrally outward from the supporting end 51. The supporting end 52 of the supporting mechanism 50 is supported on the upper end of the telescopic component 30 and is driven by the movable mechanism 322 of the telescopic component 30 to move along the optical axis. The motor 40 and the optical lens 20 are fixed and supported by the supporting end 52 of the supporting mechanism 50 and move synchronously with the supporting end 52 of the supporting mechanism 50.

[0069] Preferably, in this preferred embodiment of the present invention, the bearing end 51 of the bearing mechanism 50 extends downward and inward from the support end 52, that is, in the initial state, the motor 40 and the optical lens 20 are held inside the telescopic assembly 30, which is beneficial to reducing the overall height of the telescopic camera module.

[0070] Preferably, the supporting mechanism 50 has a trapezoidal structure or a Z-shaped structure.

[0071] The telescopic component 30 of the telescopic camera module further includes at least one ball bearing 35, which is located between the movable mechanism 322 and the supporting mechanism 50 of the telescopic component 30. When the movable mechanism 322 moves spirally upward or downward along the guide rail, the force is transmitted to the supporting mechanism 50 through the ball bearing 35. The ball bearing 35 can reduce friction through its own rotatable characteristic, so that the supporting mechanism 50 can only move upward or downward, and cannot move in other directions. The motor 40 is fixedly connected to the supporting mechanism 50, so the motor 40 can also only move upward or downward, and cannot move in other directions.

[0072] The telescopic component 30 of the telescopic camera module further includes a retaining mechanism 36, wherein the retaining mechanism 36 is fixedly connected to the support mechanism 50 and can move synchronously with the support mechanism 50 along the optical axis. The retaining mechanism 36 prevents the support mechanism 50 from rotating in a direction perpendicular to the optical axis when it is driven by the telescopic component 30, so that the motor 40 and the optical lens 20 move up and down with the support mechanism 50 along the optical axis.

[0073] In detail, the retaining mechanism 36 is disposed on the outside of the telescopic assembly 30. The retaining mechanism 36 includes a fixed component 361 and a movable component 362 that moves relative to the fixed retaining component 361 and along the optical axis. The fixed component 361 of the retaining mechanism 36 is fixed to the outside of the telescopic assembly 30, and the movable component 362 is movably connected to the fixed component 361, with the fixed component 361 restricting the direction of movement of the movable component 362. The fixed component 361 allows the movable component 362 to move up and down along the optical axis, while preventing the movable component 362 from moving in a direction perpendicular to the optical axis.

[0074] The movable part 362 of the holding mechanism 36 is connected to the bearing mechanism 50, and the movable part 362 can move with the bearing mechanism 50 and prevent the bearing mechanism 50 from moving in other directions.

[0075] Preferably, in this preferred embodiment of the invention, the fixing member 361 of the holding mechanism 36 is fixed to the photosensitive component 10. More preferably, the fixing member 361 is located inside the movable member 362, and the top end of the movable member 362 is fixedly connected to the support end 52 of the bearing mechanism 50.

[0076] It is worth mentioning that the movable mechanism 362 of the holding mechanism 36 is fixedly connected to the support end 52 of the carrying mechanism 50 by means of glue or welding. Since the movable mechanism 362 of the holding mechanism 36 can only move up and down along the optical axis and cannot move in other directions, the holding mechanism 36 ensures that the optical lens 20 and the motor 40 move only up and down along the optical axis, preventing the motor 40 and the optical lens 20 from rotating, thus providing a fixing function. Correspondingly, at least one ball bearing 35 is held between the movable mechanism 322 and the carrying mechanism 50, and the at least one ball bearing 35 can reduce friction through its own rotational characteristics. Since the carrying mechanism 50 is driven by the movable mechanism 322 of the telescopic component 30, and the support end 52 of the carrying mechanism 50 is fixed to the fixed component 362 of the holding mechanism 36, the carrying mechanism 50 can only move up or down along the optical axis and cannot move in other directions. The motor 40 is fixedly connected to the support mechanism 50, so the motor 40 can only move upward or downward, and cannot move in other directions.

[0077] like Figure 2A and Figure 2B As shown, the telescopic component 30 of the telescopic camera module has an extended working mode and a retracted working mode. When the telescopic component 30 is in the extended working mode, the telescopic component 30 drives the optical lens 20 to move upward relative to the photosensitive chip 12 of the photosensitive component 10 through the support mechanism 50, so as to increase the distance between the optical lens 20 and the photosensitive chip. When the telescopic component 30 is in the retracted working mode, the telescopic component 30 drives the optical lens 20 to move downward relative to the photosensitive chip 12 of the photosensitive component 10 through the support mechanism 50, so as to decrease the distance between the optical lens 20 and the photosensitive chip.

[0078] It is worth mentioning that, in this preferred embodiment of the present invention, the extended working mode is the working state of the telescopic camera module, and the retracted working mode is the non-working state of the telescopic camera module. Switching between the working state and the non-working state of the telescopic camera module helps to increase the back focus, ensure image quality, reduce the overall height of the camera module, and facilitate miniaturization of the camera module.

[0079] Those skilled in the art will understand that, when in the extended working mode, the upper surface of the telescopic camera module can also be higher than the back of the terminal device, but the protrusion height should not be too large and the protrusion coverage should not exceed 5mm.

[0080] Specifically, taking the retractable camera module for achieving 5x optical zoom as an example, the minimum height dimension ranges from 8mm to 11mm. Preferably, the minimum height dimension ranges from 9mm to 10mm; the maximum height dimension ranges from 23mm to 26mm. Preferably, the maximum height dimension ranges from 24mm to 25mm. Taking the retractable statue module for achieving 10x optical zoom as an example, the minimum height dimension ranges from 9mm to 12mm. Preferably, the minimum height dimension ranges from 10mm to 11mm; the maximum height dimension ranges from 28mm to 32mm. Preferably, the maximum height dimension ranges from 29mm to 31mm.

[0081] Refer to the accompanying drawings in this specification to... Figure 3 As shown, a retractable camera module according to a second preferred embodiment of the present invention will be described in the following description. The retractable camera module includes a photosensitive component 10, an optical lens 20 held in the light-sensing path of the photosensitive component 10, and a retractable component 30A. The structures of the photosensitive component 10 and the optical lens 20 are the same as those in the first preferred embodiment described above, and will not be repeated here. The difference lies in the retractable component 30A.

[0082] In detail, the telescopic assembly 30A includes a driving element 31A, a transmission device 32A, at least one ball bearing 35A, and a retaining mechanism 36A. The driving element 31A is driveably connected to the transmission device 32A, driving the transmission device 32A, which in turn moves the optical lens 20 via the retaining mechanism 36A. In this preferred embodiment of the invention, the driving element 31A is located outside the transmission device 32A, and the driving element 31A is driveably connected to the transmission device 32A.

[0083] Accordingly, the transmission device 32A includes a fixed mechanism 321A and a movable mechanism 322A connected to the fixed mechanism 321A and movable relative to the fixed mechanism 321A along the optical axis, wherein the position of the fixed mechanism 321A of the transmission device 32A is fixed. The fixed mechanism 321A is installed inside the driving element 31A, and the movable mechanism 322A is installed inside the fixed mechanism 321A. The movable mechanism 322A and the fixed mechanism 321A are arranged from the inside to the outside along the optical axis, and the fixed mechanism 321A and the driving element 31A are arranged from the inside to the outside along the optical axis. The central axis of the movable mechanism 322A, the central axis of the fixed mechanism 321A, the central axis of the driving element 31A, and the central axis of the photosensitive chip coincide with the optical axis.

[0084] Unlike the first preferred embodiment described above, the holding mechanism 36A is located inside the movable mechanism 322A of the transmission device 32A. When the fixed mechanism 321A drives the movable mechanism 322A to move spirally upward or downward, the holding mechanism 36A is driven by the transmission device 32A to move upward or downward along the optical axis, thereby causing the optical lens 20 to move upward or downward synchronously.

[0085] Accordingly, the optical lens 20 is located inside the holding mechanism 36A, and the optical lens 20 is connected to the holding mechanism 36A in a driving manner, and the holding mechanism 36A drives the optical lens 20 to move upward or downward along the optical axis.

[0086] Preferably, at least one ball 35A is disposed between the holding mechanism 36A and the optical lens 20, and the rolling of the ball 35A reduces the friction between the optical lens 20 and the holding mechanism 36A.

[0087] The holding mechanism 36A includes a fixed component 361A and a movable component 362A that moves relative to the fixed holding component 361A and along the optical axis. The movable component 362A is located outside the fixed component 361A and is connected to the movable mechanism 322A of the transmission device 32A. The movable component 362A of the holding mechanism 36A is driven to move by the movable mechanism 322A of the transmission device 32A.

[0088] Preferably, in this preferred embodiment of the invention, the movable component 362A of the holding mechanism 36A is restricted by the fixed component 361A, allowing the movable component 362A to move up and down along the optical axis and preventing movement of the movable component 362A in other directions.

[0089] Preferably, the telescopic component 30A is located on the photosensitive path of the photosensitive chip 12. The driving element 31A, the fixing mechanism 321A, and the holding mechanism 36A are mounted on the circuit board 11 of the photosensitive component 10. The driving element 31A is electrically connected to the circuit board 11. The optical lens 20 is connected to the movable part 362A through at least one ball bearing 35A. The optical lens 20 can move up and down with the holding mechanism 36A and can move together with the telescopic component 30A.

[0090] It is worth mentioning that, in this preferred embodiment of the present invention, the holding mechanism 36A is provided with a holding space 360A, wherein the shape of the holding space 360A is adapted to the shape of the optical lens 20. That is, the optical lens 20 is constrained by the holding mechanism 36A in the holding space 360A. The movable part 362A of the holding mechanism 36A is located outside the fixed part 361A, and a portion of the structure of the movable part 362A protrudes from the fixed part 361A. A ball receiving groove is formed between the movable part 362A of the holding mechanism 36A and the optical lens 20, and the ball 35A is rotatably disposed in the ball receiving groove. Therefore, in this preferred embodiment of the present invention, the holding mechanism 36A drives the optical lens 20 to move along the optical axis direction via the ball 35A.

[0091] It is worth mentioning that the movable part 362A of the holding mechanism 36A is restricted by the fixed part 361A, allowing it to move up and down only along the optical axis. Therefore, the holding mechanism 36A, through the ball 35A, can only move up and down along the optical axis.

[0092] Since the retaining mechanism 36A can only move up and down along the optical axis and cannot move in other directions, it can ensure that the optical lens 20 moves only up and down along the optical axis, preventing the optical lens 20 from rotating and thus providing a fixing function. It is understood that in other optional embodiments of the present invention, the telescopic camera module may further include a motor 40, wherein the motor 40 is the same as in the preferred embodiment described above, and will not be described again here.

[0093] Refer to the accompanying drawings in this invention specification. Figure 4 As shown, a retractable camera module according to a third preferred embodiment of the present invention will be described in the following description. The retractable camera module includes a photosensitive component 10, an optical lens 20 held in the light-sensitive path of the photosensitive component 10, and a retractable component 30B. The structures of the photosensitive component 10 and the optical lens 20 are the same as those in the first preferred embodiment described above, and will not be repeated here. The difference lies in the retractable component 30B.

[0094] In detail, the telescopic assembly 30B includes a driving element 31B, a transmission device 32B, at least one ball bearing 35B, and a retaining mechanism 36B. The driving element 31B is driveably connected to the transmission device 32B, driving the transmission device 32B, which in turn drives the optical lens 20 to move. Unlike the first and second preferred embodiments described above, in the structure of the telescopic assembly 30B, the driving element 31B is located inside the transmission device 32B and is driveably connected to it. The retaining mechanism 36B is located outside the transmission device 32B and is connected to the optical lens 20. When the driving element 36B drives the transmission device 32B to move, the retaining mechanism 36B restricts the up-and-down movement of the optical lens 20 along the optical axis.

[0095] It is worth mentioning that, in this preferred embodiment of the present invention, the ball 35B is located between the transmission device 32B and the holding mechanism 36B, and the rolling of the ball 35B reduces the sliding friction between the holding mechanism 36B and the transmission device 32B.

[0096] It is worth mentioning that, in this preferred embodiment of the present invention, the transmission device 32B is connected to the holding mechanism 36B via the ball 35B, and the holding mechanism 36B drives the optical lens 20 to move up and down along the optical axis.

[0097] Accordingly, the transmission device 32B includes a fixing mechanism 321B and a movable mechanism 322B connected to the fixing mechanism 321B and movable relative to the fixing mechanism 321B along the optical axis direction, wherein the position of the fixing mechanism 321B of the transmission device 32B is fixed. Unlike the preferred embodiment described above, in this preferred embodiment of the present invention, the movable mechanism 322B is located outside the fixing mechanism 321B, and the movable mechanism 322B protrudes upward from the outside of the fixing mechanism 321B.

[0098] In other words, in this preferred embodiment of the present invention, the driving element 31B is located inside the fixing mechanism 321B of the transmission device 32B and is in close contact with the fixing mechanism 321B, thereby generating a movement tendency of the fixing mechanism 321B perpendicular to the optical axis through the driving element 31B.

[0099] The driving element 31B is installed inside the fixing mechanism 321B, and the fixing mechanism 321B is installed inside the movable mechanism 322B. The fixing mechanism 321B and the movable mechanism 322B are arranged from the inside to the outside along the optical axis. The central axis of the movable mechanism 322B, the central axis of the fixing mechanism 321B, the central axis of the driving element 31B, and the central axis of the photosensitive chip 12 coincide with the optical axis. The telescopic component 30B is located on the photosensitive path of the photosensitive chip 12. The driving element 31B, the fixing mechanism 321B, and the holding mechanism 36B are installed on the circuit board of the photosensitive component 10. The driving element 31B and the circuit board 11 are electrically connected.

[0100] The holding mechanism 36B includes a fixed component 361B and a movable component 362B that moves relative to the fixed holding component 361B and along the optical axis. The movable component 362B is located outside the fixed component 361B and is connected to the movable mechanism 322 of the transmission device 32B. The movable component 362B of the holding mechanism 36B is driven to move by the movable mechanism 322B of the transmission device 32B.

[0101] Preferably, in this preferred embodiment of the invention, the ball bearing 35B is rotatably disposed between the movable mechanism 322B and the movable component 362B, transmitting the movement of the movable mechanism 322B to the movable component 362B and driving the movable component 362B to move. The movable component 362B of the holding mechanism 36B is driveably connected to the optical lens 20, wherein the movable component 362B drives the optical lens 20 to move up and down along the optical axis under the driving action of the movable mechanism 322B.

[0102] It is worth mentioning that the retaining mechanism 36B is disposed outside the movable mechanism 322B. The fixing component 361B of the retaining mechanism 36B is fixed to the circuit board 11, and the movable component 362B is disposed outside the fixing component 361B. The fixing component 361B of the retaining mechanism 36B restricts the movement direction of the movable component 362B, allowing the movable component 362B to move up and down along the optical axis, and preventing the movable component 362B from moving in other directions. Preferably, the outer layer of the retaining mechanism 36B is fixedly connected to the optical lens 20 by means of glue or welding. Since the retaining mechanism 36B can only move up and down along the optical axis and cannot move in other directions, the retaining mechanism 36B can be used to ensure that the optical lens 20 moves only up and down along the optical axis, preventing the optical lens 20 from rotating and thus playing a fixing role.

[0103] The movable component 362B of the holding mechanism 36B includes a movable connecting end 3621B and a movable fixed end 3622B extending integrally from the movable connecting end 3621B in a direction perpendicular to the optical axis. The movable connecting end 3621B of the movable component 362B is connected to the fixed component 361B, and the fixed component 361B restricts the movement of the movable connecting end 3621B to vertical movement along the optical axis. The movable fixed end 3622B is connected to the optical lens 20, and drives the optical lens 20 to move vertically along the optical axis via the movable fixed end 3622B.

[0104] It is worth mentioning that a receiving space is provided between the movable part 362B of the holding mechanism 36B and the movable mechanism 322B of the transmission device 32B, and the at least one ball 35B is received in the receiving space. Preferably, in this preferred embodiment of the present invention, the receiving space is formed between the movable fixed end 3622B of the movable part 362B and the movable mechanism 322B.

[0105] Preferably, the driving element 31B is a piezoelectric ceramic motor, which has the characteristic of being able to expand and contract according to the applied voltage value. By applying an external excitation to the piezoelectric ceramic motor, the piezoelectric ceramic motor generates an inverse piezoelectric effect, thereby causing the piezoelectric ceramic motor to deform. This deformation causes the fixed mechanism 321B to have a tendency to move perpendicular to the optical axis. This tendency to move is transmitted to the movable mechanism 322B through contact, causing the movable mechanism 322B to generate relative movement.

[0106] Similar to the preferred embodiment described above, the fixed mechanism 321B and the movable mechanism 322B of the transmission device 32B are connected in a helical transmission manner. Specifically, the fixed mechanism 321B is provided with a helical raised guide rail, and the movable mechanism 322B has a groove structure corresponding to the guide rail that matches the fixed mechanism 321B. Through the cooperation of the raised and groove structures of the fixed mechanism 321B and the movable mechanism 322B, when the outer fixed mechanism 321B generates a force with a clockwise rotational tendency, the inner movable mechanism 322B moves spirally upward under the guidance of the guide rail. When the outer fixed mechanism 321B generates a force with a counterclockwise rotational tendency, the inner movable mechanism 322B moves spirally downward under the guidance of the guide rail.

[0107] When the movable mechanism 322B moves spirally upward or downward along the guide rail, it provides an upward rotational force to the ball bearing 35B connected to the movable mechanism 322B. This force is transmitted through the ball bearing 35B to the movable component 362B of the holding mechanism 36B. Since the movable component 362B of the holding mechanism 36B is fixedly connected to the optical lens 20 by adhesive or other means, the optical lens 20 cannot rotate and can only move upward or downward. Simultaneously, the ball bearing 35B can reduce friction through its own rotatable characteristic. In this situation, the optical lens 20 only moves upward or downward; it cannot move in other directions. This structure prevents the optical lens 20 from rotating.

[0108] Referring to the accompanying drawings of this invention Figure 5 As shown, a lens extension method for a camera module according to another aspect of the present invention will be explained in the following description. The lens extension method for the camera module includes the following steps:

[0109] (a) An external excitation is applied to a driving element 31, causing the driving element 31 to deform under the action of the external excitation;

[0110] (b) A fixing mechanism 321 that drives a transmission device 32 that is transversely connected to the driving element 31, wherein the driving element 31 is closely connected to the fixing mechanism 321, and the deformation of the driving element 31 causes the fixing mechanism 321 to generate a movement tendency perpendicular to the optical axis; and

[0111] (c) The motion tendency of the fixed mechanism 321 is transmitted to a movable mechanism 322 of the transmission device 32, and the movable mechanism 322 converts the motion tendency of the fixed mechanism 321 into a spiral up-and-down motion along the optical axis, thereby driving an optical lens 20 to move up and down.

[0112] In step (a) of the lens extension method of the camera module of the present invention, the driving element 31 is a piezoelectric ceramic motor, wherein the piezoelectric ceramic motor has the characteristic of being able to extend and retract according to the applied voltage value.

[0113] The lens extension / retraction method of the camera module of the present invention further includes: driving a retaining mechanism 36, wherein the retaining mechanism 36 is fixedly connected to the optical lens 20, and the retaining mechanism 36 restricts the movement of the optical lens 20 along the optical axis. The retaining mechanism 36 includes a fixed component 361 and a movable component 362 that is movable relative to the fixed component 361, wherein the movable component 362 is fixedly connected to the optical lens 20, and the movement direction of the movable component 362 is restricted by the fixed component 361, allowing the movable component to move up and down along the optical axis while preventing movement in other directions.

[0114] The lens extension method of the camera module of the present invention further includes: transmitting the force of the movable mechanism 322 to the optical lens 20 by at least one ball bearing 35 in a rolling manner, so as to reduce the friction between the optical lens 20 and the transmission tension 32.

[0115] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and any variations or modifications may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A telescopic assembly adapted for a telescopic camera module, the telescopic camera module further comprising an optical lens, characterized in that, The telescopic component includes: At least one driving element; and A transmission device, wherein the transmission device is driveably connected to the at least one driving element, the transmission device includes a fixed mechanism and a movable mechanism, wherein the movable mechanism is helically and drively connected to the fixed mechanism, the driving element drives the fixed mechanism to generate a motion tendency perpendicular to the optical axis, wherein the movable mechanism converts the motion tendency of the fixed mechanism into a helical and up-and-down motion along the optical axis, thereby driving the optical lens to move up and down along the optical axis, wherein the fixed mechanism is provided with a helical guide rail, and the movable mechanism is provided with a track groove that matches the fixed mechanism, so that the movable mechanism can convert the motion tendency of the fixed mechanism into a helical motion along the optical axis.

2. The telescopic assembly according to claim 1, wherein the movable mechanism of the transmission device is located inside the fixed mechanism, the driving element is located outside the fixed mechanism, and the movable mechanism, the fixed mechanism, and the driving element are closely fitted together.

3. The telescopic assembly according to claim 1, wherein the movable mechanism of the transmission device is located outside the fixed mechanism, the driving element is located inside the fixed mechanism, and the movable mechanism, the fixed mechanism, and the driving element are closely fitted together.

4. The telescopic assembly according to claim 2 or 3, further comprising at least one ball, wherein the at least one ball is rotatably disposed on the movable mechanism, thereby reducing friction between the movable mechanism and the optical lens by the ball rotating on its own.

5. The telescopic assembly according to claim 2 or 3, further comprising a retaining mechanism, the retaining mechanism comprising a fixed component and a movable component, wherein the fixed component restricts the direction of movement of the movable component, allows the movable component to move along the optical axis, and prevents the movable component from moving in other directions, thereby the retaining mechanism restricts the optical lens from moving up and down along the optical axis.

6. The telescopic assembly according to claim 5, wherein the fixed part of the retaining mechanism is fixed to the outside of the driving element, the movable part is located outside the fixed part, thereby the optical lens drives the movable part of the retaining mechanism, and the fixed part restricts the movement direction of the optical lens through the movable part.

7. The telescopic assembly according to claim 5, wherein the retaining mechanism is disposed inside the transmission device, and the movable mechanism of the transmission device is drively connected to the movable component of the retaining mechanism, wherein the movable mechanism drives the movable component of the retaining mechanism to move up and down along the optical axis, thereby the fixed component restricting the movement direction of the optical lens through the movable component.

8. The telescopic assembly according to claim 5, wherein the retaining mechanism is disposed outside the transmission device, and the movable mechanism of the transmission device is drively connected to the movable component of the retaining mechanism, wherein the movable mechanism drives the movable component of the retaining mechanism to move up and down along the optical axis, thereby the fixed component restricting the movement direction of the optical lens through the movable component.

9. The telescopic assembly according to claim 5, wherein the driving element is a piezoelectric ceramic motor.

10. A telescopic camera module, characterized in that, include: One photosensitive component; An optical lens, wherein the optical lens is held in the light-sensing path of the photosensitive element; as well as A telescopic assembly, wherein the optical lens is tractably disposed on the telescopic assembly, and the telescopic assembly drives the optical lens to move up and down along the optical axis, wherein the telescopic assembly includes: At least one driving element; and A transmission device is provided, wherein the transmission device is driveably connected to the at least one driving element, the transmission device includes a fixed mechanism and a movable mechanism, wherein the movable mechanism is helically and drively connected to the fixed mechanism, the driving element drives the fixed mechanism to generate a movement tendency perpendicular to the optical axis, wherein the movable mechanism converts the movement tendency of the fixed mechanism into a helical and up-and-down movement along the optical axis, and the movable mechanism drives the optical lens to move up and down along the optical axis to adjust the relative positional relationship between the optical lens and the photosensitive component, wherein the fixed mechanism is provided with a helical guide rail, and the movable mechanism is provided with a track groove that matches the fixed mechanism so that the movable mechanism converts the movement tendency of the fixed mechanism into a helical movement along the optical axis.

11. The telescopic camera module according to claim 10, wherein the movable mechanism of the transmission device is located inside the fixed mechanism, the driving element is located outside the fixed mechanism, and the movable mechanism, the fixed mechanism, and the driving element are closely fitted together.

12. The telescopic camera module according to claim 10, wherein the movable mechanism of the transmission device is located outside the fixed mechanism, the driving element is located inside the fixed mechanism, and the movable mechanism, the fixed mechanism, and the driving element are closely fitted together.

13. The telescopic camera module according to claim 11 or 12, wherein the telescopic component further includes at least one ball bearing, wherein the at least one ball bearing is rotatably disposed on the movable mechanism, thereby reducing friction between the movable mechanism and the optical lens by the ball bearing rotating on its own.

14. The telescopic camera module according to claim 11 or 12, wherein the telescopic component further includes a retaining mechanism, the retaining mechanism including a fixed component and a movable component, wherein the fixed component restricts the movement direction of the movable component, allows the movable component to move along the optical axis direction, and prevents the movable component from moving in other directions, thereby the retaining mechanism restricts the optical lens from moving up and down along the optical axis direction.

15. The telescopic camera module according to claim 14, wherein the fixed part of the holding mechanism is fixed to the outside of the driving element, the movable part is located outside the fixed part, and the optical lens drives the movable part of the holding mechanism, and the fixed part restricts the movement direction of the optical lens through the movable part.

16. The telescopic camera module according to claim 14, wherein the retaining mechanism is disposed inside the transmission device, and the movable mechanism of the transmission device is connected in a driving manner to the movable component of the retaining mechanism, wherein the movable mechanism drives the movable component of the retaining mechanism to move up and down along the optical axis, thereby the fixed component restricting the movement direction of the optical lens through the movable component.

17. The telescopic camera module according to claim 14, wherein the retaining mechanism is disposed outside the transmission device, and the movable mechanism of the transmission device is connected in a driving manner to the movable component of the retaining mechanism, wherein the movable mechanism drives the movable component of the retaining mechanism to move up and down along the optical axis, thereby the fixed component restricting the movement direction of the optical lens through the movable component.

18. The telescopic camera module according to claim 14, wherein the driving element is a piezoelectric ceramic motor.

19. The telescopic camera module according to claim 14, wherein the photosensitive component includes a circuit board and a photosensitive chip, wherein the driving element, the fixing mechanism of the transmission device, and the fixing component of the holding mechanism are fixed to the circuit board of the photosensitive component.

20. The telescopic camera module according to claim 10, further comprising a motor and a support mechanism, wherein the optical lens is disposed on the motor, the motor and the optical lens are disposed on the support mechanism, and the support mechanism is tractably connected to the movable mechanism of the transmission device.

21. A lens extension / retraction method for a camera module, characterized in that, The lens extension / retraction method of the camera module includes the following steps: (a) An external excitation is applied to a driving element, causing the driving element to deform under the action of the external excitation; (b) A fixing mechanism for driving a transmission device that is driveably connected to the driving element, wherein the driving element is closely connected to the fixing mechanism, and the deformation of the driving element causes the fixing mechanism to generate a motion tendency perpendicular to the optical axis; and (c) The motion tendency of the fixed mechanism is transmitted to a movable mechanism of the transmission device, the movable mechanism converts the motion tendency of the fixed mechanism into a spiral up-and-down motion along the optical axis, thereby driving an optical lens to move up and down. The fixed mechanism is provided with a spiral guide rail, and the movable mechanism is provided with a track groove that matches the fixed mechanism, so that the movable mechanism can convert the motion tendency of the fixed mechanism into a spiral motion along the optical axis.

22. The lens extension method of the camera module according to claim 21, wherein the driving element is a piezoelectric ceramic motor, wherein the piezoelectric ceramic motor has the characteristic of being able to extend and retract in accordance with the applied voltage value.

23. The lens extension method for a camera module according to claim 21, wherein the lens extension method for the camera module further comprises: A retaining mechanism is driven, wherein the retaining mechanism is fixedly connected to the optical lens, and the retaining mechanism restricts the movement of the optical lens along the optical axis.

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