阅读说明：本技术 联动装置、摄像模组及电子设备 (Linkage device, camera module and electronic equipment ) 是由 淡佳鹏 郭利德 卢磊 王昕� 于 2020-07-01 设计创作，主要内容包括：本申请公开了一种联动装置、摄像模组及电子设备。联动装置用于连续变焦的摄像模组中,其包括基座、以及与基座滑动连接的第一载座和第二载座；基座上设有第一定位元件,第一载座上设有第一感应元件和第二定位元件,第二载座上设有第二感应元件；第一感应元件与第一定位元件相对设置,以检测第一载座相对基座的位置；第二感应元件与第二定位元件相对设置,以检测第二载座相对第一载座的位置。通过将第一载座和第二载座的运动关系设置成关联运动,在第一载座运动时,第二载座可以响应第一载座的运动而对应运动,以提高第一载座和第二载座的位置控制精度。(The application discloses linkage, module and electronic equipment make a video recording. The linkage device is used in a camera module with continuous zooming and comprises a base, a first carrying seat and a second carrying seat which are connected with the base in a sliding manner; the base is provided with a first positioning element, the first carrier seat is provided with a first sensing element and a second positioning element, and the second carrier seat is provided with a second sensing element; the first sensing element is arranged opposite to the first positioning element so as to detect the position of the first carrier seat relative to the base; the second sensing element is arranged opposite to the second positioning element so as to detect the position of the second carrier seat relative to the first carrier seat. By setting the motion relation of the first load seat and the second load seat into the correlated motion, when the first load seat moves, the second load seat can correspondingly move in response to the motion of the first load seat, so that the position control precision of the first load seat and the second load seat is improved.)

1. A linkage arrangement for use in a zoom-continuous camera module, the linkage arrangement comprising: the device comprises a base, a first carrying seat and a second carrying seat, wherein the first carrying seat and the second carrying seat are connected with the base in a sliding mode; the base is provided with a first positioning element, the first carrier seat is provided with a first sensing element and a second positioning element, and the second carrier seat is provided with a second sensing element;

the first induction element and the first positioning element are arranged oppositely to detect the position of the first carrier seat relative to the base;

the second sensing element is arranged opposite to the second positioning element so as to detect the position of the second carrier seat relative to the first carrier seat.

2. The linkage of claim 1, wherein the first carriage includes a first bearing portion and a first extension portion, the first extension portion is located at an end of the first bearing portion facing the base, and the first sensing element is disposed on the first extension portion.

3. The linkage of claim 2, wherein said first carrier further comprises a second extension;

the second extending part is located at one end of the first bearing part facing the second bearing seat, and the second positioning element is arranged on the second extending part.

4. The linkage according to claim 3 wherein the second carriage includes a second carrier portion and a first boss portion, the first boss portion being located on one side of the second carrier portion, the second sensing element being located on the first boss portion.

5. The linkage of claim 4, wherein the second extension has a first stop at an end remote from the first bearing portion, and the first projection is located between the first stop and the first bearing portion.

6. The linkage of claim 2, wherein the first carrier further comprises a second boss located on one side of the first carrier, the second locating element being located on the second boss.

7. The linkage of claim 6, wherein the second carriage includes a second carrier portion and a third extension portion, the third extension portion being located at an end of the second carrier portion facing the first carriage, the second sensing element being disposed on the third extension portion.

8. The linkage of claim 7, wherein the third extension has a second stop at an end remote from the second bearing portion, and the second projection is located between the second stop and the second bearing portion.

9. The linkage according to any one of claims 1 to 8, wherein the first sensing element is adapted to generate a first sensing signal comprising information on the position of the first carriage relative to the base.

10. The linkage according to any one of claims 1 to 9, wherein the second sensing element is adapted to generate a second sensing signal comprising position information of the second carriage relative to the first carriage.

11. A linkage according to any one of claims 1 to 9, wherein the first carrier is adapted to carry a first lens assembly for effecting zoom and the second carrier is adapted to carry a second lens assembly for effecting focus.

12. The linkage of claim 11 wherein said first lens assembly moves first and said second lens assembly moves following said first lens assembly when said linkage is in operation;

when the first lens assembly and the second lens assembly move to the preset positions, zooming is achieved by adjusting the first lens assembly, and focusing is achieved by adjusting the second lens assembly.

13. The utility model provides a module of making a video recording which characterized in that includes: a first lens assembly, a second lens assembly, and a linkage according to any one of claims 1 to 12;

the first lens assembly is arranged on the first carrying seat, and the second lens assembly is arranged on the second carrying seat.

14. The camera module of claim 13, wherein the camera module further comprises: a control circuit;

the control circuit is used for correspondingly controlling the movement of the first carrier seat according to a first induction signal of the first induction element or the first positioning element.

15. The camera module of claim 14, wherein the control circuit is further configured to correspondingly control the movement of the second stage according to the first sensing signal and a second sensing signal of the second sensing element; alternatively, the first and second electrodes may be,

the control circuit is further used for correspondingly controlling the movement of the second carrier according to the first induction signal and the second induction signal of the second positioning element.

16. The camera module of any one of claims 13-15, wherein the first lens assembly moves first and the second lens assembly moves with the first lens assembly during operation of the camera module;

when the first lens assembly and the second lens assembly move to the preset positions, zooming is achieved by adjusting the first lens assembly, and focusing is achieved by adjusting the second lens assembly.

17. An electronic device comprising the camera module according to any one of claims 13 to 16.

Technical Field

The application relates to the technical field of camera modules, in particular to a linkage device, a camera module and electronic equipment.

Background

In recent years, a camera module of a mobile phone realizes an optical zoom function with a specific magnification, and is more popular with consumers. In order to realize optical zooming with certain fixed magnification, the lens can reach a specified position along with the movement of the carrier seat so as to realize zooming and focusing.

However, the position control precision of the carrier seat in the general camera module is poor, the lens on the carrier seat realizes zooming with certain specific magnification, continuous zooming cannot be realized, and the actual imaging effect of the camera module is poor.

Disclosure of Invention

An object of the application is to provide a linkage, make a video recording module and electronic equipment to solve general camera module and can not realize the scheduling problem of zooming in succession.

In order to solve the technical problem, the application provides a linkage device for use in a camera module with continuous zooming. The linkage device includes: the device comprises a base, a first carrying seat and a second carrying seat, wherein the first carrying seat and the second carrying seat are connected with the base in a sliding mode; the base is provided with a first positioning element, the first carrier seat is provided with a first sensing element and a second positioning element, and the second carrier seat is provided with a second sensing element; the first induction element and the first positioning element are arranged oppositely to detect the position of the first carrier seat relative to the base; the second sensing element is arranged opposite to the second positioning element so as to detect the position of the second carrier seat relative to the first carrier seat. Based on the above, the relative position of the second carriage is detected by using the first carriage as a reference object, and when the first carriage as the reference object moves, the relative position relationship between the second carriage and the first carriage is changed; this variation may be achieved by cooperation of the second sensing element and the second positioning element. Correspondingly, the second load seat can quickly respond to the movement of the first load seat to realize synchronous movement, so that the position control precision of the second load seat is improved. For example: with the first carriage in position a and the second carriage in position B (both positions are generally closer), it is now necessary to move the first carriage to position C and the second carriage to position D to accomplish zooming and focusing at a certain magnification. Because the existing sensing element and positioning element are affected by factors such as manufacturing and process level, and high-precision control over a long distance cannot be realized, the control precision is low when the carrier is moved over a long distance, for example, the first carrier cannot be moved to the position C accurately, but is at a position near the position C; in a similar way, the second carrier seat is influenced by the control precision and is usually near the position D, so that finally, the first carrier seat and the second carrier seat have errors, and thus, a focusing distance (D-C) between the first carrier seat and the second carrier seat has a larger error, and the focusing distance is a very critical factor influencing the imaging effect, so that the actual imaging effect of the camera module is poor. The linkage device provided by the application is based on the fact that the movement relation of the first carrying seat and the second carrying seat is set to be linkage, and when the first carrying seat moves from the position A to the position C, the relative position relation between the second carrying seat and the first carrying seat can be changed; this change is achieved by the cooperation of the second inductive element and the second positioning element. Thus, the second carriage moves synchronously from position B to position D in quick response to the movement of the first carriage. Furthermore, through the cooperation of the second sensing element and the second positioning element, the second carriage can cooperate with the related control circuit and/or control chip to detect the relative position relationship with the first carriage again, so as to form a closed-loop detection system. It will be appreciated that during the movement of the first carriage from position a to position C, each time, this can be controlled by a certain short step, the distance of which is much shorter than the distance from a to C, the control accuracy of the existing inductive element and positioning element for short distances is very high, so that the second carriage can follow the first carriage to position C with high accuracy; then the second carries the seat to move a distance to reach position D again, like this, the error of focusing distance in this application mainly is through second year seat from C remove to D arouse, compare in current scheme, the distance that receives the error influence is shorter (this application second carries the seat to have the error only D-C section, current is that second year seat D-B section has the error, simultaneously, first year seat C-A section also has the error), and the factor that receives the error influence still less (only the second carries the seat to move and has the error, and prior art first year seat, the second carries the seat all to need to move, all can the error). Therefore, the error of the final focusing distance is smaller, the zooming and focusing of a certain multiplying power with higher precision can be realized, and the imaging effect is improved.

In some embodiments, the first carrier includes a first carrying portion and a first extending portion, the first extending portion is located at an end of the first carrying portion facing the base, and the first sensing element is disposed on the first extending portion. Therefore, the first sensing element can be conveniently matched with the first positioning element on the base to acquire the position information related to the first carrier seat.

In some embodiments, during the sliding of the first carriage relative to the base, the first sensing element is kept opposite to the first positioning element, so as to ensure that the first sensing element and the first positioning element can cooperate to obtain the position information of the first carriage relative to the base.

In some embodiments, the first carriage further comprises a second extension; the second extending part is located at one end of the first bearing part facing the second bearing seat, and the second positioning element is arranged on the second extending part. Therefore, the second positioning element can be matched with the second sensing element on the second carrier seat conveniently to acquire the position information related to the second carrier seat.

In some embodiments, the second carriage includes a second carrying portion and a first protruding portion, the first protruding portion is located on one side of the second carrying portion, and the second sensing element is disposed on the first protruding portion. Therefore, the second sensing element on the first protruding part can be matched with the second positioning element on the second extending part to acquire the position information of the second carrier seat.

In some embodiments, the second extending portion is provided with a first limiting block at an end portion far away from the first bearing portion, and the first protruding portion is located between the first limiting block and the first bearing portion. Thereby, the distance between the second sensing element and the second positioning element does not exceed the maximum sensing distance, so that the possibility that the first projection deviates from the second extension in extreme situations (such as dropping or shaking violently, etc.) is reduced. It should be understood that when the second carriage is about to be away from the first carriage, the first limiting block is abutted against the first protruding portion, so that the first protruding portion is ensured to be located within the length range of the second extending portion. Correspondingly, the second sensing element on the first protruding part can still be matched with the second positioning element on the second extending part so as to detect the position of the second loading seat relative to the first loading seat.

In some embodiments, the first carriage further includes a second protrusion portion located on one side of the first carriage, and the second positioning element is disposed on the second protrusion portion.

In some embodiments, the second carriage includes a second carrying portion and a third extending portion, the third extending portion is located at an end of the second carrying portion facing the first carriage, and the second sensing element is disposed on the third extending portion. Therefore, the second sensing element on the second protruding part can be matched with the second positioning element on the third extending part to acquire the position information of the second carrier seat.

In some embodiments, the third extending portion is provided with a second limiting block at an end portion far away from the second bearing portion, and the second protruding portion is located between the second limiting block and the second bearing portion. It should be understood that when the second carriage is about to be away from the first carriage, the second limiting block is abutted against the second protrusion, so that the second protrusion can be ensured to be located within the length range of the third extension. Correspondingly, the second sensing element on the second protruding part can still be matched with the second positioning element on the third extending part so as to detect the position of the second load seat relative to the first load seat.

In some embodiments, during the sliding process of the second carriage with respect to the base, the second sensing element is kept opposite to the second positioning element, so as to ensure that the second sensing element and the second positioning element can cooperate to obtain the position information of the second carriage with respect to the first carriage.

In some embodiments, the first sensing element is configured to generate a first sensing signal, and the first sensing signal includes position information of the first carriage with respect to the base. The first sensing signal comprises position information of the first carrier seat relative to the base. According to the first sensing signal, the relative distance between the base and the first carrier seat can be better determined by the related control circuit, so that the position control precision of the first carrier seat is improved.

In some embodiments, the second sensing element is configured to generate a second sensing signal, where the second sensing signal includes position information of the second carriage with respect to the first carriage. The second sensing signal comprises position information of the second carrier seat relative to the first carrier seat. According to the second induction signal, the relative distance between the second load seat and the first load seat can be better determined by the related control circuit, so that the position control precision of the second load seat is improved.

In some implementations, the first positioning element is configured to generate a first sensing signal, and the first sensing signal includes position information of the first carriage relative to the base. The first sensing signal comprises position information of the first carrier seat relative to the base. According to the first sensing signal, the relative distance between the base and the first carrier seat can be better determined by the related control circuit, so that the position control precision of the first carrier seat is improved.

In some embodiments, the second positioning element is configured to generate a second sensing signal, where the second sensing signal includes position information of the second carriage with respect to the first carriage. The second sensing signal comprises position information of the second carrier seat relative to the first carrier seat. According to the second induction signal, the relative distance between the second load seat and the first load seat can be better determined by the related control circuit, so that the position control precision of the second load seat is improved.

In some embodiments, the first carriage is configured to carry a first lens assembly for zoom and the second carriage is configured to carry a second lens assembly for focus.

In some embodiments, the linkage is operative such that the first lens assembly moves first and the second lens assembly moves following the first lens assembly. When the first lens assembly and the second lens assembly move to the preset positions, zooming is achieved by adjusting the first lens assembly, and focusing is achieved by adjusting the second lens assembly. It should be understood that, based on the cooperation between the first carriage and the second carriage, the relative position relationship between the first lens assembly and the second lens assembly can be precisely grasped, so as to improve the imaging effect of the camera module applying the linkage device.

In some embodiments, the first positioning element and the second positioning element are both elongated magnets, and the first sensing element and the second sensing element are both hall sensors; or the first positioning element and the second positioning element are both Hall sensors, and the first sensing element and the second sensing element are both strip-shaped magnets. The strip-shaped magnets can be matched with the corresponding Hall sensors conveniently to realize position detection.

The application also provides a camera module, including: a first lens assembly, a second lens assembly, and a linkage of the above embodiments. The first lens assembly is arranged on the first carrying seat, and the second lens assembly is arranged on the second carrying seat.

In some embodiments, the camera module further comprises: a control circuit. The control circuit is used for correspondingly controlling the movement of the first carrier seat according to a first induction signal of the first induction element or the first positioning element. It will be appreciated that, taking the first lens assembly as an example of a continuously variable focus lens assembly, due to the position determination of the first carriage, the synchronization may determine the position of the first lens assembly so as to control the position of the first lens assembly to achieve a zoom of a particular magnification.

In some embodiments, the control circuit is further configured to correspondingly control the movement of the second carriage according to the first sensing signal and the second sensing signal of the second sensing element. Or the control circuit is further configured to correspondingly control the movement of the second carriage according to the first sensing signal and the second sensing signal of the second positioning element. It should be appreciated that, taking the second lens assembly as the lens assembly in focus as an example, due to the position determination of the second carriage, the synchronization may determine the position of the second lens assembly so as to control the position of the second lens assembly to achieve focus.

In some embodiments, when the camera module is in operation, the first lens assembly moves first, and the second lens assembly moves along with the first lens assembly. When the first lens assembly and the second lens assembly move to the preset positions, zooming is achieved by adjusting the first lens assembly, and focusing is achieved by adjusting the second lens assembly. It should be understood that, based on the cooperation between the first carriage and the second carriage, the relative position relationship between the first lens assembly and the second lens assembly can be accurately grasped to improve the imaging effect of the camera module.

The application also provides an electronic device comprising the camera module in each embodiment. The electronic device may include a mobile phone, a tablet computer, a notebook computer, a vehicle-mounted monitor, a display, and the like.

According to the method and the device, the motion relation between the first load seat and the second load seat is set to be related motion, and when the first load seat moves, the second load seat can correspondingly move in response to the motion of the first load seat, so that the position control precision of the first load seat and the second load seat is improved.

Drawings

Fig. 1 is a schematic diagram of a first lens assembly, a second lens assembly and an image sensor provided in an embodiment of the present application.

Fig. 2 is a perspective view of a linkage provided in an embodiment of the present application.

Fig. 3 is a cross-sectional view of the linkage of fig. 2.

Fig. 4 is a top view of the linkage of fig. 2.

FIG. 5 is an exploded view of a linkage according to an embodiment of the present application.

FIG. 6 is a partial schematic view of a linkage provided in accordance with an embodiment of the present application.

FIG. 7 is a partial schematic view of a linkage provided in accordance with an embodiment of the present application from another perspective.

Fig. 8 is a schematic diagram of relative movement of the first carriage and the second carriage according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

In a typical optical zoom camera module, at least two movable lens groups are included, a lens assembly for achieving certain fixed magnification zoom needs to move within a certain range to achieve zoom through a change of a relative position, and a lens assembly for achieving focusing needs to move within a certain range to achieve focusing. In contrast, a general camera module is further provided with a voice coil motor, and the voice coil motor provides thrust to drive the corresponding carrier to move. Synchronously, the movement of the carrier may synchronously move the lens assembly on the carrier to urge the variable focus lens assembly to a predetermined position.

Since the variable focus lens package should be carried on a carrier; accordingly, the relative position of the lens assembly is also determined based on the relative position of the carrier. That is, the positional accuracy of the stage is closely related to the zoom accuracy of the corresponding lens assembly. It will be appreciated that in a camera module, the lens assembly for achieving fixed magnification zoom has a high requirement on the precision of the movement of the carrier. However, in the actual use process, the general camera module is not controlled and position feedback is not timely due to the structural design of the motor motion system and the limitation of the motor motion detection control system, so that the detection accuracy of the carrier seats is low.

Based on this, when the general camera module needs to realize the zooming with certain fixed magnification, the position to which the motor carrier seat actually moves has certain deviation with the preset position; synchronously, the actual position of the lens assembly on the motor mount may also deviate from the predetermined position. The influence of the position deviation appears relatively prominent in the zooming field, and the user experience of the electronic equipment using the camera modules is influenced to a certain extent.

For example: the first carriage is at position a and the second carriage is at position B, and now the first carriage needs to move to position C and the second carriage needs to move to position D to accomplish zoom and focus of × 3 magnification. However, the positioning element and the sensing element are affected by factors such as manufacturing process, materials and the like, and the movement of the relevant carrier seat is not well controlled; that is, the position control accuracy of the stages is low, the first stage may move to the position C + or the position C-, and the second stage may move to the position D + or the position D-.

It should be understood that position C +, position C-is different from position C, and position D +, position D-is also different from position D; therefore, the problems of defocusing or blurring and the like easily occur in the image formed by the common camera module; the imaging effect of the camera modules is poor, and the user acceptance degree of the images is relatively low.

In view of the above problems, please refer to fig. 1 to 7, the embodiment of the present application provides a linkage device for a camera module, a camera module and an electronic apparatus. The linkage 100 may carry associated lens assemblies (1100, 1200) to cooperate with the lens assemblies to achieve zoom and focus for continuous optical zoom functionality.

When the electronic equipment who uses this module of making a video recording makes a video recording, the aggregate unit in the module of making a video recording can drive relevant lens subassembly and remove, makes these some lens subassemblies move predetermined position accurately, makes a video recording the module from this and can realize zooming and focusing of specific multiplying power to improve user's shooting experience.

In order to facilitate understanding of technical solutions of the embodiments of the present application, in each embodiment, a first carrier is mainly used as a carrier for carrying a variable-focus first lens assembly, a second carrier is used as a carrier for carrying a focusing second lens assembly, and a mobile phone which is widely used is used as an electronic device, which is exemplified herein. It should also be understood that the first and second carriages may carry other types of lens assemblies as desired; the electronic device may also refer to a tablet computer, a notebook computer, a vehicle-mounted monitor, a display, and the like, which is not limited in the present application.

Fig. 1 is a schematic diagram of a first lens assembly, a second lens assembly, and an image sensor, fig. 2 is a perspective view of a linkage, and fig. 3 is a cross-sectional view of the linkage. Referring to fig. 1 to fig. 3, a linkage apparatus 100 according to an embodiment of the present disclosure includes a base 110, a first carriage 120, and a second carriage 130. The base 110 has a sliding shaft 112, and the sliding shaft 112 can be sequentially inserted into the first carrier 120 and the second carrier 130. As shown in fig. 2 and 3, the number of the sliding shafts 112 is exemplified as two to make the sliding of the first and second stages 120 and 130 relatively stable. It should be understood that the number of the sliding shafts 112 can be adjusted according to the requirement, the number of the sliding shafts 112 can also be one or three, and so on.

Correspondingly, the first carriage 120 and the second carriage 130 are slidably connected to the base 110, and the sliding axis 112 of the base 110 defines the respective moving directions. Based on this, the first carriage 120 and the second carriage 130 may be driven by corresponding motors to move along the length direction of the sliding shaft 112 to respectively change the relative positions. Based on the movement of the first stage 120, the first lens assembly 1100 can be synchronously driven to move, and based on the movement of the second stage 130, the second lens assembly 1200 can also be synchronously driven to move; thus, first lens assembly 1100 and second lens assembly 1200 are caused to cooperate to achieve different magnifications of zooming and focusing.

In order to improve the position control accuracy of the first stage 120 and the second stage 130, the embodiments of the present application set the movement of the first stage 120 and the second stage 130 to be a correlated movement; that is, the movement of the second carriage 130 is linked to the movement of the first carriage 120. When the first stage 120 moves, the second stage 130 also moves correspondingly in response to the movement of the first stage 120, so that the position control accuracy of the first stage 120 and the second stage 130 can be improved.

By the concept of the coupled motion, the accuracy of the position control of the first carriage 120 and the second carriage 130 can be improved. Thus, the first lens assembly 1100 on the first carriage 120 can be precisely moved to a predetermined position to achieve a zoom of a specific magnification. The second lens assembly 1200 of the second carriage 130 can also be moved to a predetermined position with a fast response and precision to achieve focusing.

It should be understood that when the first carriage 120 and the second carriage 130 are moved in association, the respective speeds of the first carriage 120 and the second carriage 130 may be adjusted according to the use requirement. That is, the moving speeds of the first stage 120 and the second stage 130 may be different, and it should not be understood that the moving speeds of the first stage 120 and the second stage 130 are the same.

Fig. 4 is a top view of the linkage and fig. 5 is an exploded schematic view of the linkage. Referring to fig. 2, fig. 3, fig. 4 and fig. 5, in some embodiments, the first carrier 120 includes a first carrying portion 122 and a first extending portion 124. The first bearing part 122 can bear the first lens assembly 1100 to drive the first lens assembly to move. The first bearing portion 122 further has a through hole (not shown) corresponding to the sliding shaft 112, and the through hole of the first bearing portion 122 can be passed through by the sliding shaft 112, so that the first carrier block 120 can slide through the sliding shaft 112. Therefore, when the first bearing part 122 is driven by the corresponding motor to move along the sliding shaft 112, the first bearing part 122 can synchronously drive the first lens assembly to move, so as to change the position of the first lens assembly. By changing the position, the first lens component can realize zooming with a specific magnification.

In order to determine the position of the first carrying part 122 for synchronously determining the position of the first lens assembly, the embodiments are realized by establishing a position relationship between the first carriage 120 and the base 110; that is, the relative position of the first carriage 120 is determined by using the base 110 as a reference. To this end, the base 110 is provided with a first positioning element 142, and the first extension portion 124 of the first carrier 120 is provided with a first sensing element 144 corresponding to the first positioning element 142.

In some embodiments, such as the first sensing element 144 shown in fig. 2, 4 and 5, which is located on one side of the first extending portion 124 and faces the first positioning element 142, it can be understood with reference to the cross-sectional view of fig. 3.

FIG. 6 is a partial schematic view of the linkage. As illustrated in fig. 2 to 6, the first extension portion 124 is located at one side of the first bearing portion 122 and extends in a direction toward the base 110. Based on the extending structure of the first extending portion 124, when the first bearing portion 122 slides on the sliding shaft 112, the first sensing element 144 on the first extending portion 124 can always maintain a sensing relationship with the first positioning element 142 on the base 110, so as to determine the relative position of the first carriage 120 through the cooperation of the first sensing element 144 and the first positioning element 142. Due to the position determination of the first stage 120, the synchronization may determine the position of the first lens assembly, facilitating control of the position of the first lens assembly to achieve a zoom of a particular magnification.

In some embodiments, the first positioning element 142 and the first sensing element 144 are disposed opposite to each other. During the movement of the first carriage 120, the first positioning element 142 and the first sensing element 144 may be always in an opposite relationship, so as to cooperate to obtain the position information of the first carriage 120; alternatively, in some cases, the first positioning element 142 and the first sensing element 144 may be staggered by a certain distance, but the first positioning element 142 and the first sensing element 144 may still cooperate to achieve the acquisition of the position information of the first carrier seat 120.

Referring to fig. 2 to 5, in some embodiments, the second carrier 130 includes a second carrier portion 132. The second bearing portion 132 can bear the second lens assembly to drive the second lens assembly to move. Similarly, the second bearing portion 132 has a through hole (not shown) corresponding to the sliding shaft 112, and the through hole of the second bearing portion 132 can be penetrated by the sliding shaft 112, so that the second bearing seat 130 can slide through the sliding shaft 112. Therefore, when the second bearing part 132 is driven by the corresponding motor to move along the sliding shaft 112, the second bearing part 132 can synchronously drive the second lens assembly to move, so as to change the position of the second lens assembly. By changing the position, the second lens assembly can realize the focusing function.

In order to determine the position of the second carrying part 132 for synchronously determining the position of the second lens assembly, the linkage 100 of each embodiment is implemented by establishing an associated positional relationship between the second carriage 130 and the first carriage 120; that is, the relative position of the second carriage 130 is determined by using the first carriage 120 as a dynamic reference object. To this end, the first carriage 120 is further provided with a second positioning element 146, and the second carriage 130 is provided with a second sensing element 148 corresponding to the second positioning element 146. The relative position of the second carriage 130 is determined by the cooperation of the second sensing element 148 and the second positioning element 146. Due to the position determination of the second carriage 130, the position of the second lens assembly can be synchronously determined, so that the position of the second lens assembly can be controlled to realize focusing.

For example, when the linkage 100 of each embodiment is applied to a mobile phone, the first carrier 120 drives the first lens element to move and the second carrier 130 drives the second lens element to move based on the focal length of a specific magnification selected by a user, so as to achieve zooming and focusing of the specific magnification.

In some embodiments, the second positioning element 146 and the second sensing element 148 are oppositely disposed. During the movement of the first carriage 120 and the second carriage 130, the second positioning element 146 and the second sensing element 148 may be always in an opposite relationship to cooperate with each other to obtain the position information of the first carriage 120; alternatively, in some cases, the second positioning element 146 and the second sensing element 148 may be staggered by a certain distance, but the second positioning element 146 and the second sensing element 148 may still cooperate to obtain the position information of the second carriage 130.

It should be understood that, by using the first carriage 120 as a reference object to detect the relative position of the second carriage 130, when the first carriage 120 as a reference object moves, the relative positional relationship between the second carriage 130 and the first carriage 120 changes; this variation may be achieved by the cooperation of the second inductive element 148 and the second positioning element 146. Accordingly, the second carriage 130 can rapidly respond to the movement of the first carriage 120 to achieve a synchronous movement by adjusting the driving direction and the acting time of the motor for driving the second carriage 130 to move. The position of the second carriage 130 relative to the first carriage 120 can then be detected again by the cooperation of the second sensing element 148 and the second positioning element 146, thereby forming a closed loop detection system. Through multiple closed-loop detections, the relative position relationship between the second carriage 130 and the first carriage 120 can be precisely controlled, so as to promote the second carriage 130 to move to a predetermined position more precisely, thereby improving the position control precision of the second carriage 130.

After the first lens assembly carried by the first carrier 120 and the second lens assembly carried by the second carrier 130 reach predetermined positions, the zoom operation is completed by adjusting the first lens assembly on the first carrier 120, and then the focusing operation is completed by adjusting the second carrier 130 and the second carrier 130 to move slightly so that the second lens assembly on the second carrier 130 is focused. Based on this, the mobile phone using the linkage device 100 can accurately realize the operations of zooming and focusing, so that the user can obtain a picture with a required magnification and the shooting experience of the user is improved.

In some embodiments, the first sensing element 144 generates a first sensing signal based on sensing the first positioning element 142; the first sensing signal includes information about the position of the first susceptor 120 relative to the base 110. The second sensing element 148 correspondingly generates a second sensing signal based on the sensing of the second positioning element 146; the second sensing signal includes the position information of the second susceptor 130 relative to the first susceptor 120.

The first sensing signal and the second sensing signal can be transmitted to a control circuit of the camera module. Accordingly, the control circuit can obtain the position information of the first carrier seat 120 according to the first sensing signal, and obtain the position information of the second carrier seat 130 according to the second sensing signal. Since the position information about the second susceptor 130 in the second sensing signal is determined based on the first susceptor 120; based on the first sensing signal and the second sensing signal, the control circuit can better determine the relative distance between the base 110, the first carriage 120 and the second carriage 130, so as to improve the position control precision of the first carriage 120 and the second carriage 130 and more precisely control the movement of the two carriages.

Fig. 7 is a partial schematic view of the linkage from another perspective. Referring to fig. 2, 3, 4, 5 and 7, in some embodiments, in order to realize the relative movement between the second carriage 130 and the first carriage 120, the first carriage 120 further includes a second extension portion 126. The second extension portion 126 is also located at one side of the first carrying portion 122 corresponding to the first extension portion 124. However, unlike the first extension portion 124, the second extension portion 126 extends toward the second carriage 130. The second extending portion 126 is provided with a second positioning element 146 corresponding to the second sensing element 148. The second carriage 130 includes a first protrusion 134 in addition to the second bearing portion 132. The first protrusion 134 is located at one side of the second bearing 132, and a second sensing element 148 is disposed on the first protrusion 134. It will be appreciated that second extension 126 and first boss 134 are on the same side relative to sliding shaft 112, thereby enabling second sensing element 148 on first boss 134 to mate with second positioning element 146 on second extension 126.

In some embodiments, for example, the second sensing element 148 shown in fig. 4 and 7 is located on one side of the first protrusion 134 and faces the second positioning element 146, which can be understood in conjunction with the cross-sectional view of fig. 3, the exploded view of fig. 5, and the like.

In some embodiments, the length of second elongated portion 126 is greater than the length of first raised portion 134 along the length of sliding shaft 112. Based on this, during the associated movement of the first carriage 120 and the second carriage 130, the second sensing element 148 on the first protrusion 134 can always maintain a sensing relationship with the second positioning element 146, so as to detect the relative position of the second carriage 130 through the second positioning element 146.

In some embodiments, to facilitate understanding of the positional relationship of the related structures of the first carriage 120, the following description is made by the first carrying portion 122 including a first end, a second end, a first side and a second side. It should be understood that the first and second ends are opposite ends of the first bearing part 122; the first end is illustrated as an end of the first supporting portion 122 close to the base 110, and the second end is illustrated as an end of the first supporting portion 122 close to the second carrier 130. The direction from the first end to the second end or the direction from the second end to the first end may be equivalent to the length direction of the sliding shaft 112. The first and second sides are opposite sides of the first bearing part 122. The first side and the second side may be equivalent to both sides of the first bearing part 122 opposite to the sliding shaft 112.

Based on the above definition of the first bearing part 122, the first extension part 124 is exemplified to be located on the first side of the first bearing part 122, and the extending direction of the first extension part 124 is a direction from the second end to the first end. Since the second sensing element 148 and the first sensing element 144 are relatively independent of each other, the second extending portion 126 can be located on the first side of the first bearing portion 122; alternatively, the second extension portion 126 may be located on the second side of the first bearing portion 122. It should be understood that the second extension 126 extends in a direction from the first end to the second end opposite the first extension 124, and the first protrusion 134 of the second carriage 130 is on the same side as the second extension 126 so that the second positioning element 146 can be sensed by the second sensing element 148.

Referring to fig. 2 to 5 and fig. 7, in some embodiments, in order to reduce the possibility that the first protrusion 134 may deviate from the length range of the second extension portion 126 in extreme cases, the second extension portion 126 is provided with a first stopper 128 at an end far from the first bearing portion 122. The first protrusion 134 may be defined between the first stop block 128 and the first bearing portion 122 by the cooperation of the first stop block 128, the second extension portion 126 and the first bearing portion 122, such that the distance between the second sensing element 148 and the second positioning element 146 does not exceed the maximum sensing distance.

It should be understood that in some extreme cases, such as: when the mobile phone using the linkage 100 falls from high altitude or is shaken relatively violently, etc., the second carriage 130 and the first carriage 120 may be far away from each other, and the second sensing element 148 cannot cooperate with the second positioning element 146 to detect the position. In this embodiment, based on the structure of the first stopper 128, when the second carriage 130 is far away from the first carriage 120, the first stopper 128 abuts against the first protrusion 134 to ensure that the first protrusion 134 is located within the length of the second extension 126. Correspondingly, the second sensing element 148 on the first protrusion 134 can still cooperate with the second positioning element 146 on the second extension 126 to detect the position of the second carriage 130 relative to the first carriage 120.

In some embodiments, the first stop 128 and the second extension 126 can be integrally formed from the same material to increase the overall strength. Such as: the first stopper 128 and the second extension 126 are made of a polymer.

In other embodiments, the first stop 128 and the second extension 126 can be separate components and secured by adhesive, welding, threading, interference fit, or the like.

In other embodiments, the second carriage includes a second carrier portion and a third extension portion without the first projection. The third extending part is located at one end of the second bearing part facing the first carrier seat and extends towards the first carrier seat; the third extending part is provided with a second sensing element.

Corresponding to the structure of the second load seat, the first load seat does not have a second extending part, but comprises a first load bearing part, a first extending part and a second bulge part; the second bulge is provided with a second positioning element. In some embodiments, the second projection and the first extension are located on the same side of the first carrier. In other embodiments, the second protrusion and the first extension are located on different sides of the first bearing portion, which is not limited in this respect.

It should be appreciated that the relationship of the third extension portion and the second protrusion portion, similar to the relationship of the second extension portion and the first protrusion portion in other embodiments, may also facilitate the cooperation of the second sensing element and the second positioning element to perform the position detection function.

In some embodiments, the third extension portion may also be provided with a corresponding second stop at an end remote from the second bearing portion to define the second protrusion portion between the second stop and the second bearing portion. Like the first limiting block in other embodiments, when the second carriage is about to be away from the first carriage, the second limiting block abuts against the second protrusion, so that the second protrusion is ensured to be located within the length range of the third extension. Correspondingly, the second sensing element on the second protruding part can still be matched with the second positioning element on the third extending part so as to detect the position of the second load seat relative to the first load seat.

Referring to fig. 2 to 6, in some embodiments, in order to increase the overall strength of the first carrier 120, the first carrying portion 122, the first extending portion 124 and the second extending portion 126 may be an integrally formed carrier structure. In other embodiments, when the first carriage 120 includes the second protrusion, the first carrier 122, the first extension 124 and the second protrusion may be integrally formed.

Referring to fig. 2 to 5 and fig. 7, in some embodiments, in order to improve the overall strength of the second carrier 130, the second carrying portion 132 and the first protruding portion 134 may be an integrally formed carrier structure. In other embodiments, when the second carriage 130 includes the second carrying portion 132 and the third extension portion, the second carrying portion 132 and the third extension portion can be integrally formed.

In some embodiments, the first positioning element 142 and the second positioning element 146 are both magnets; such as: the first positioning element 142 and the second positioning element 146 are both strip-shaped magnets, so as to be matched with corresponding sensing elements to realize position detection. Correspondingly, the first sensing element 144 and the second sensing element 148 are both hall sensors; the hall sensor can detect the position by sensing the relative change of the magnetic field.

In other embodiments, the first positioning element 142 and the second positioning element 146 are both hall sensors. Based on this, the first sensing signal is generated by the first positioning element 142, and the second sensing signal is generated by the second positioning element 146. Correspondingly, the first inductive element 144 and the second inductive element 148 are both magnets; such as: the first sensing element 144 and the second sensing element 148 are both magnets with elongated shapes, so as to cooperate with corresponding positioning elements to realize position detection.

In other embodiments, the two positioning elements may be different, one being a magnet and the other being a hall sensor, and correspondingly, the two sensing elements may be a hall sensor and the other being a magnet, so as to be respectively engaged with the two positioning elements.

In some embodiments, in order to drive the first stage 120 to move, the first stage 120 may be provided with a first driving coil, and the base 110 may be correspondingly provided with a first driving magnet; the first driving coil and the first driving magnet form a first voice coil motor. Based on this, the first voice coil motor can drive the first carriage 120 to move, so as to change the relative position of the first lens assembly. Similarly, the second carriage 130 may have a second driving coil, and the base 110 may have a second driving magnet; the second driving coil and the second driving magnet form a second voice coil motor. Based on this, the second voice coil motor can drive the second carriage 130 to move, so as to change the relative position of the second lens assembly.

Fig. 8 is a schematic view of the relative movement of the first carriage and the second carriage. Referring to fig. 8, in some embodiments, similar to the above example, the first carriage 120 is at position a, the second carriage 130 is at position B, and now the first carriage 120 needs to move to position C, and the second carriage 130 needs to move to position D to accomplish zoom and focus of × 3 magnification. According to the linkage device provided by the embodiment of the present application, the movement of the first carriage 120 and the second carriage 130 is related, and when the first carriage 120 moves from the position a to the position C, the relative position relationship between the second carriage 130 and the first carriage 120 changes; this change is achieved by the cooperation of the second inductive element and the second positioning element. Thus, the second stage 130 moves synchronously from the position B to the position D in quick response to the movement of the first stage 120. Furthermore, through the cooperation of the second sensing element and the second positioning element, the second carriage 130 cooperates with the related control circuit and/or control chip to detect the relative position relationship with the first carriage 120 again, so as to form a closed-loop detection system. Through multiple closed-loop detections, the feedback of the relative position between the second carriage base 130 and the first carriage base 120 is more accurate, so that the first carriage base 120 can be precisely moved to the position C, and the second carriage base 130 can be precisely moved to the position D, thereby achieving x 3-magnification zooming and focusing.

Referring to fig. 1 to 8, in some embodiments, when the linkage 100 is applied to a camera module, the camera module further includes structures for capturing image information. Such as: the camera module further comprises an image sensor 1300, which image sensor 1300 is arranged at a side of the second lens assembly 1200 and remote from the first lens assembly 1100 for capturing relevant image information.

In other embodiments, the camera module may include other necessary or unnecessary structures. Such as: the camera module further comprises a reflector, and the reflector can change the incident angle of external light. Therefore, when the camera module is applied to a mobile phone, the linkage 100 can be arranged along the length direction or the width direction of the mobile phone to have a longer zooming and focusing stroke. Therefore, the shooting effect of the mobile phone can be correspondingly improved, and the use experience of the user on the mobile phone can be improved.

While the foregoing is directed to embodiments of the present application, it will be appreciated by those skilled in the art that various changes and modifications may be made without departing from the principles of the application, and it is intended that such changes and modifications be covered by the scope of the application.