Locking mechanism and drive motor therefor

Abstract

The application discloses a locking mechanism, which comprises a bearing frame, a locking part arranged at a corner of the bearing frame, a locking guide rod arranged outside the bearing frame and adapted to be detachably connected with the locking part, and a driving assembly for driving the locking guide rod to move along a direction parallel to the side surface of the bearing frame. When the horizontal driving locking guide rod moves to the side end of the bearing frame, the locking part is in abutment with the locking guide rod, so that the movement of the bearing frame in the axial direction of the optical axis is locked. When the horizontal driving locking guide rod deviates from the side end of the bearing frame, the locking part is separated from the locking guide rod, so that the bearing frame is released. The locking guide rod and the driving assembly are arranged at the side surface of the bearing frame, so that the structure is more compact, and the size of the locking mechanism is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of optical focus driving, in particular to a locking mechanism and a driving motor thereof. Background Art

[0002] Electronic devices have become indispensable social and entertainment tools in our daily lives, and people's expectations of these devices are also increasing. When it comes to photography, people are increasingly concerned with camera focus performance, hoping to obtain higher-quality photos. Typically, the lens is fixed to a supporting frame, which is driven by a drive assembly to move along the lens' optical axis to achieve focus.

[0003] However, when the focus moving part is in the reset state, it is easily affected by external forces such as impact and shaking. The back and forth movement inside the drive motor causes wear on the device and shortens the service life of the device. At the same time, the collision of the device produces abnormal noise, resulting in a poor user experience.

[0004] The existing locking mechanism of the focus moving part is located at the diagonal side of the carrying frame, which occupies a large space and is not conducive to reducing the overall size of the driving motor. Summary of the Invention

[0005] An object of the present invention is to provide a locking mechanism that can lock a carrying frame from moving axially along an optical axis and has a compact structure.

[0006] Another object of the present invention is to provide a driving motor that is small in size and capable of locking the movement of a focus moving member along the axial direction of its optical axis.

[0007] In order to achieve one of the purposes of this application, the technical solution adopted by the present invention is: a locking mechanism, including a carrying frame, with a locking part provided at a corner; a locking guide rod, located on the outside of the carrying frame, suitable for being detachably connected to the locking part; a driving assembly, driving the locking guide rod to move in a direction parallel to the side of the carrying frame, when the locking guide rod is horizontally driven to move to the side end of the carrying frame, the locking part and the locking guide rod are abutted to lock the movement of the carrying frame in the axial direction of the optical axis, and when the locking guide rod is horizontally driven to deviate from the side end of the carrying frame, the locking part is separated from the locking guide rod to release the carrying frame.

[0008] In one embodiment of the present application, the locking guide rod includes a main body and a stop portion, the main body extends along a side direction parallel to the supporting frame, and the driving assembly causes the main body to move horizontally along the side direction parallel to the supporting frame; the stop portion extends from one end of the main body toward the supporting frame.

[0009] In one embodiment of the present application, the locking portion is protrudingly provided at the lower end of the supporting frame and extends toward the locking guide rod. When the main body moves toward the middle of the supporting frame, the stop portion moves to the side end of the supporting frame and is able to abut against the locking portion.

[0010] In one embodiment of the present application, the driving assembly includes a driving coil and a driving magnet, the driving coil is fixed on the main body of the locking guide rod, and the driving magnet is arranged opposite to the driving coil. After the driving coil is energized, it moves relative to the driving magnet to cause the main body to move away from the middle of the supporting frame, so that the stop portion deviates from the side end of the supporting frame and disengages from the locking portion, or to cause the main body to move toward the middle of the supporting frame, so that the stop portion moves to the side end of the supporting frame and abuts against the locking portion.

[0011] In one embodiment of the present application, the drive assembly also includes a reset member, which is connected to the main body of the locking guide rod. When the drive coil is energized, the locking guide rod moves horizontally parallel to the side of the supporting frame. When the drive coil is de-energized, the reset member resets the locking guide rod.

[0012] In one embodiment of the present application, the reset member includes a reset spring and a protective box, the reset spring is accommodated in the protective box, and avoidance holes are opened on two opposite side surfaces of the protective box. The main body is suitable for passing through the avoidance holes and moving horizontally relative to the protective box. One end of the reset spring abuts against the inner wall surface of the protective box, and the other end of the reset spring abuts against the main body. After the driving coil is energized, the locking guide rod moves relative to the protective box and the reset spring is deformed. After the driving coil is de-energized, the reset spring pushes the locking guide rod to reset.

[0013] In one embodiment of the present application, the main body of the locking guide rod is in the shape of a "cross" and is placed parallel to the outer wall of the supporting frame. The locking guide rod includes a first rod segment, a second rod segment and a third rod segment connected in sequence. The stop portion is connected to the side of the first rod segment away from the second rod segment. The first rod segment crosses the protective box from the avoidance through hole. The reset spring is wrapped around the outer periphery of the first rod segment. The drive coil is wrapped around the outer periphery of the third rod segment. The width of the second rod segment is greater than the width of the reset spring and the width of the drive coil to separate the reset spring and the drive coil.

[0014] In one embodiment of the present application, a first limiting wall is provided on the second rod segment, and the first limiting wall is located on a side of the second rod segment connected to the first rod segment, and is arranged toward the return spring. One end of the return spring abuts against the inner wall of the protection box, and the other end of the return spring abuts against the first limiting wall. The first limiting wall is suitable for moving in the protection box, so that the return spring can be retained in the protection box.

[0015] In one embodiment of the present application, a second limiting wall is provided on the first rod segment, and the second limiting wall is located at one end of the first rod segment connected to the stop portion. When the stop portion abuts against the locking portion, the second limiting wall abuts against the outer wall surface of the protective box.

[0016] In one embodiment of the present application, there are two locking guide rods and two driving assemblies, which are respectively located on opposite sides of the supporting frame in a centrally symmetrical manner. A locking portion is provided on a set of diagonal corners of the supporting frame to cooperate with the two locking guide rods.

[0017] In order to achieve another purpose of this application, the technical solution adopted by the present invention is: a driving motor, including a base, a shell engaged on the base, and a supporting frame, the supporting frame can be axially moved along the optical axis and accommodated in the accommodating cavity defined by the base and the shell, and the driving motor also includes the locking mechanism as described above.

[0018] In one embodiment of the present application, a focusing coil is provided on the periphery of the carrying frame, and the driving magnet of the locking mechanism is located between the carrying frame and the driving coil, so that the driving magnet can provide a magnetic field to the focusing coil and the driving coil at the same time.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The locking guide rod and the drive assembly are located on the side of the load-bearing frame, making the structure more compact and helping to reduce the size of the locking mechanism;

[0021] (2) There are two locking guide rods and two driving assemblies, which are located on opposite sides of the load-bearing frame and cooperate with a set of locking parts on the diagonal corners of the load-bearing frame, so that the load-bearing frame is subjected to balanced force and its locking is more reliable.

[0022] (3) The driving magnet is located between the supporting frame and the driving coil. The driving coil of the locking mechanism and the focusing coil of the driving motor share the driving magnet, which reduces the number of parts and makes the structure more compact, which is conducive to reducing the volume of the driving motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1is a schematic structural diagram of a locking mechanism according to some embodiments of the present application;

[0024] Figure 2 is a schematic assembly diagram of a locking guide rod, a reset member, and a drive coil according to some embodiments of the present application;

[0025] Figure 3 is a schematic structural diagram of a locking guide rod according to some embodiments of the present application;

[0026] Figure 4 is a schematic structural diagram of a locking mechanism according to other embodiments of the present application;

[0027] Figure 5 is an exploded view of a drive motor according to some embodiments of the present application.

[0028] In the figure: 1. Locking mechanism; 10. Carrying frame; 11. Locking part; 20. Locking guide rod; 21. Main body; 211. First rod segment; 212. Second limiting wall; 213. Second rod segment; 214. First limiting wall; 215. Third rod segment; 22. Stop part; 30. Driving assembly; 31. Driving coil; 32. Driving magnet; 33. Resetting part; 331. Resetting spring; 332. Protective box; 333. Avoidance hole; 2. Driving motor; 40. Base; 50. Housing; 60. Focusing coil. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions and positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present invention.

[0031] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0032] like Figure 1As shown, a locking mechanism 1 includes a carrying frame 10, with a locking portion 11 provided at a corner; a locking guide rod 20, located on the outside of the carrying frame 10, suitable for being detachably connected to the locking portion 11; a driving assembly 30, driving the locking guide rod 20 to move in a direction parallel to the side of the carrying frame 10, when the locking guide rod 20 is horizontally driven to move to the side end of the carrying frame 10, the locking portion 11 is abutted against the locking guide rod 20, thereby locking the movement of the carrying frame 10 in the axial direction of the optical axis, and when the locking guide rod 20 is horizontally driven to deviate from the side end of the carrying frame 10, the locking portion 11 is separated from the locking guide rod 20, thereby releasing the carrying frame 10.

[0033] That is to say, the locking guide rod 20 is located on the outside of the supporting frame 10 and is able to move linearly along the extension direction of the side of the supporting frame 10 through the driving assembly 30. The locking portion 11 is arranged at the corner of the supporting frame 10. One end of the locking guide rod 20 is arranged close to the side end of the supporting frame 10 and is suitable for abutting against the locking portion 11 to prevent the supporting frame 10 from moving axially along the optical axis, that is, upward along the Z axis.

[0034] In some embodiments, as Figure 1 and Figure 2 As shown, the locking guide rod 20 includes a main portion 21 and a stop portion 22. The main portion 21 extends parallel to a side surface of the carrier frame 10, and the drive assembly 30 causes the main portion 21 to move horizontally in a direction parallel to the side surface of the carrier frame 10. The stop portion 22 extends from one end of the main portion 21 toward the carrier frame 10. In other words, the main portion 21 of the locking guide rod 20 is located outside the carrier frame 10, and its extension direction aligns with the extension direction of the carrier frame 10 on that side. The main portion 21 is linearly moved along the extension direction of the carrier frame 10 on that side by the drive assembly 30, that is, along the X-axis. This allows for a more compact arrangement of the main portion 21 and the carrier frame 10, facilitating a reduction in the size of the locking structure. It is understood that the movement of the main portion 21 along the X-axis does not interfere with the movement of the carrier frame 10 along the Z-axis. The stop portion 22 extends from one end of the main body 21 toward the locking portion 11 at the corner of the supporting frame 10 , and moves along the X-axis direction together with the main body 21 , so that the stop portion 22 approaches or moves away from the locking portion 11 .

[0035] Specifically, when the main body 21 moves in the negative direction along the X-axis, the stop portion 22 moves away from the corner of the supporting frame 10, so that the stop portion 22 is disengaged from the locking portion 11, and the supporting frame 10 is able to move upward along the Z-axis; when the supporting frame 10 sinks to the bottom, the main body 21 moves in the positive direction along the X-axis, the stop portion 22 approaches the corner of the supporting frame 10, so that the stop portion 22 abuts against the locking portion 11, and the stop portion 22 is able to prevent the supporting frame 10 from moving upward along the Z-axis.

[0036] In some embodiments, as Figure 1 As shown, the locking portion 11 is protrudingly provided at the lower end of the carrier frame 10 and extends toward the locking guide rod 20. When the main body 21 moves toward the middle of the carrier frame 10, the stop portion 22 moves to the side end of the carrier frame 10 and abuts against the locking portion 11. It is understood that when the carrier frame 10 sinks to the bottom, the stop portion 22 of the locking guide rod 20 abuts against the locking portion 11 of the carrier frame 10, thereby locking the carrier frame 10 in the axial direction of the optical axis. The locking portion 11 is provided at the lower end of the carrier frame 10, the locking guide rod 20 is provided on one side of the carrier frame 10, and the stop portion 22 is located above the locking portion 11 to lock the carrier frame 10. This helps to reduce the total height of the locking guide rod 20 and the carrier frame 10, further reducing the size of the locking mechanism 1.

[0037] In some embodiments, as Figure 1 As shown, the driving assembly 30 includes a driving coil 31 and a driving magnet 32. The driving coil 31 is fixed on the main body 21 of the locking guide rod 20, and the driving magnet 32 ​​is arranged opposite to the driving coil 31. After the driving coil 31 is energized, it moves relative to the driving magnet 32, so that the main body 21 moves away from the middle of the supporting frame 10, that is, moves along the negative direction of the X-axis, so that the stop portion 22 deviates from the side end of the supporting frame 10 and disengages from the locking portion 11, or so that the main body 21 moves toward the middle of the supporting frame 10, that is, moves along the positive direction of the X-axis, so that the stop portion 22 moves to the side end of the supporting frame and abuts against the locking portion 11.

[0038] That is to say, the driving coil 31 is fixed to the locking guide rod 20, and the driving magnet 32 ​​is arranged relative to the driving coil 31, so that the driving coil 31 is located in the magnetic field generated by the driving magnet 32. Preferably, the driving magnet 32 ​​is located between the main body 21 and the supporting frame 10. Specifically, when the driving coil 31 is energized, it cooperates with the driving magnet 32 ​​to generate Lorentz magnetic force, and the driving coil 31 moves relative to the driving magnet 32. It can be understood that by changing the direction of the current in the driving coil 31, the driving coil 31 can be moved in two opposite directions relative to the driving magnet 32, further driving the locking guide rod 20 to move relative to the supporting frame 10 along the negative or positive direction of the X-axis, so that the stop portion 22 moves away from or approaches the corner of the supporting frame 10, and further causes the stop portion 22 to disengage from or counteract the locking portion 11.

[0039] In some embodiments, as Figure 1 and Figure 3 As shown, the driving assembly 30 also includes a reset member 33, which is connected to the main body 21 of the locking guide rod 20. When the driving coil 31 is energized, the locking guide rod 20 moves horizontally parallel to the side of the supporting frame 10. When the driving coil 31 is de-energized, the reset member 33 resets the locking guide rod 20.

[0040] Specifically, when the driving coil 31 is energized, the locking guide rod 20 is moved relative to the carrier frame 10 in the negative direction of the X-axis, so that the stopper 22 is disengaged from the locking portion 11. When the driving coil 31 is de-energized, the reset member 33 acts on the main body 21, so that the locking guide rod 20 is moved relative to the carrier frame 10 in the positive direction of the X-axis, so that the stopper 22 abuts against the locking portion 11. It is understood that, alternatively, when the driving coil 31 is energized, the locking guide rod 20 is moved relative to the carrier frame 10 in the positive direction of the X-axis, so that the stopper 22 abuts against the locking portion 11. When the driving coil 31 is de-energized, the reset member 33 acts on the main body 21, so that the locking guide rod 20 is moved relative to the carrier frame 10 in the negative direction of the X-axis, so that the stopper 22 abuts against the locking portion 11.

[0041] Preferably, when the driving coil 31 is energized, the stop portion 22 is disengaged from the locking portion 11, and at this time, the focusing coil 60 that drives the supporting frame 10 to move along the Z axis is also energized. That is, after the driving coil 31 is energized, the stop portion 22 is disengaged from the locking portion 11, so that the supporting frame 10 moves along the Z axis under the action of the energized focusing coil 60; after the focusing coil 60 is de-energized, the supporting frame 10 sinks to the bottom, and at this time, the driving coil 31 is also de-energized, and the stop portion 22 is pressed against the locking portion 11 through the reset member 33, so that the supporting frame 10 can be prevented from being affected by external force or shaking and moving along the Z axis, which is beneficial to reduce device wear and extend device life.

[0042] That is to say, the driving coil 31 and the focusing coil 60 can be powered on and off at the same time, and the driving coil 31 can pass a unidirectional current to make the locking guide rod 20 move unidirectionally along the negative direction of the X-axis. The reset member 33 is further used to make the locking guide rod 20 move along the positive direction of the X-axis, thereby avoiding the need to change the current direction of the driving coil 31, so that the driving method of the locking mechanism 1 is simpler and easier to control, and has better stability and is more reliable.

[0043] In some embodiments, as Figure 1 and Figure 3 As shown, the reset member 33 includes a reset spring 331 and a protection box 332, the reset spring 331 is accommodated in the protection box 332, and the opposite sides of the protection box 332 are provided with avoidance holes 333, the main body 21 is suitable for passing through the avoidance holes 333 and moving horizontally relative to the protection box 332, one end of the reset spring 331 is against the inner wall of the protection box 332, and the other end of the reset spring 331 is against the main body 21, after the driving coil 31 is energized, the locking guide rod 20 is moved relative to the protection box 332 and the reset spring 331 is deformed, after the driving coil 31 is de-energized, the reset spring 331 pushes the locking guide rod 20 to reset.

[0044] That is, at least a portion of the main body 21 is adapted to pass through the avoidance hole 333 in the protective box 332 to be accommodated within the protective box 332. The main body 21 is capable of moving relative to the protective box 332 under the force of the drive coil 31 or the return spring 331. Specifically, one end of the return spring 331 abuts against the inner wall of the protective box 332, while the other end of the return spring 331 abuts against the main body 21, allowing it to elastically deform within the protective box 332. When the drive coil 31 is energized, the locking guide rod 20 moves in the negative direction of the X-axis, disengaging the stopper 22 from the locking portion 11 and compressing the return spring 331, causing it to accumulate energy. When the drive coil 31 is de-energized, the return spring 331 expands, releasing energy, pushing the locking guide rod 20 in the positive direction of the X-axis, causing the stopper 22 to abut against the locking portion 11. It is understandable that the protection box 332 can prevent foreign matter from being stuck in the return spring 331 and affecting the normal deformation of the return spring 331 .

[0045] In an alternative embodiment, if Figure 3 As shown, the radial dimension of the return spring 331 is adapted to the protection box 332, and the return spring 331 can be compressed or stretched along the inner wall of the protection box 332, which is beneficial to avoid the return spring 331 from bending in its axial direction, so that the force of the return spring 331 on the locking guide rod 20 is along the X-axis direction.

[0046] In some embodiments, as Figure 2 and Figure 3 As shown, the main body 21 of the locking guide rod 20 is in the shape of a "cross" and is placed parallel to the outer wall of the supporting frame 10. The locking guide rod 20 includes a first rod segment 211, a second rod segment 213 and a third rod segment 215 connected in sequence. The stop portion 22 is connected to the side of the first rod segment 211 away from the second rod segment 213. The first rod segment 211 crosses the protective box 332 from the avoidance through hole 333. The return spring 331 is wrapped around the outer periphery of the first rod segment 211. The drive coil 31 is wound around the outer periphery of the third rod segment 215. The width of the second rod segment 213 is greater than the radial width of the return spring 331 and the width of the drive coil 31 to separate the return spring 331 and the drive coil 31.

[0047] That is to say, if Figure 3As shown, the first rod segment 211 of the locking guide rod 20 is adapted to pass through the avoidance hole 333 and be accommodated in the protective box 332, allowing the locking guide rod 20 to move relative to the protective box 332 along the X-axis. The return spring 331 surrounds the circumference of the first rod segment 211. Furthermore, the width of the second rod segment 213 is greater than the width of the return spring 331, which facilitates that one end of the return spring 331 abuts against the second rod segment 213. The drive coil 31 is wound and fixed around the third rod segment 215. When the drive coil 31 is energized and cooperates with the drive magnet 32 ​​to generate a Lorentz force, the locking guide rod 20 and the drive coil 31 can move along the X-axis. Furthermore, the width of the second rod segment 213 is greater than the width of the drive coil 31, which facilitates providing a reference when installing the drive coil 31 and facilitating installation of the drive coil 31. At the same time, the second rod segment 213 separates the return spring 331 from the drive coil 31.

[0048] It is worth mentioning that, compared with winding the drive coil 31 into shape and then fixing it on one side of the third rod segment 215, in this embodiment, the drive coil 31 is directly wound on the third rod segment 215, that is, the drive coil 31 is wound on the circumferential side of the third rod segment 215, so that the fixation of the drive coil 31 and the locking guide rod 20 is more reliable, and at the same time, the locking guide rod 20 is evenly stressed. Furthermore, the installation of the drive coil 31 and the locking guide rod 20 is more compact, which is conducive to reducing the size of the locking mechanism 1.

[0049] In an optional embodiment, the main body 21 of the locking guide rod 20 is a "cross"-shaped thin plate, and the main body 21 is placed face to face with the side wall of the supporting frame 10, so as to reduce the volume of the locking guide rod 20, which is further beneficial to reducing the size of the locking mechanism 1.

[0050] In some embodiments, as Figure 2 and Figure 3As shown, a first limiting wall 214 is provided on the second rod segment 213, and the first limiting wall 214 is located on the side of the second rod segment 213 connected to the first rod segment 211, and is arranged toward the return spring 331. One end of the return spring 331 abuts against the inner wall of the protection box 332, and the other end of the return spring 331 abuts against the first limiting wall 214, so as to increase the contact area between the return spring 331 and the second rod segment 213, so that the connection between the return spring 331 and the locking guide rod 20 is more reliable. Furthermore, the first limiting wall 214 is suitable for moving in the protective box 332, so that the reset spring 331 is retained in the protective box 332. That is, when the locking guide rod 20 moves to the maximum stroke in the positive direction of the X-axis, the stop portion 22 abuts against the locking portion 11. At this time, the first limiting wall 214 is located in the protective box 332, so that the reset spring 331 is still fully accommodated in the protective box 332 in its longest state.

[0051] In some embodiments, as Figure 2 and Figure 3 As shown, a second limiting wall 212 is provided on the first rod segment 211. The second limiting wall 212 is located on one end of the first rod segment 211 connected to the stop portion 22. When the stop portion 22 abuts against the locking portion 11, the second limiting wall 212 abuts against the outer wall surface of the protection box 332. That is, the second limiting wall 212 is located outside the protection box 332. When the locking guide rod 20 moves along the negative direction of the X-axis due to the action of the drive coil 31, the stop portion 22 moves away from the corner of the supporting frame 10, and the second limiting wall 212 moves away from the protection box 332. When the main body 21 moves along the positive direction of the X-axis due to the return spring 331, the stop portion 22 approaches the corner of the supporting frame 10, and the second limiting wall 212 approaches the protection box 332 until the second limiting wall 212 abuts against the outer wall of the protection box 332, thereby preventing the return spring 331 from further extending. At this time, the stop portion 22 abuts against the locking portion 11. In an optional embodiment, the second limiting wall 212 and the stop portion 22 are coplanar, thereby enhancing the structural strength of the stop portion 22 and improving the reliability of the locking mechanism 1.

[0052] In some embodiments, as Figure 4As shown, there are two locking guide rods 20 and two driving assemblies 30, which are respectively located on opposite sides of the supporting frame 10 in a center-symmetrical manner. A locking portion 11 is provided on a set of diagonal corners of the supporting frame 10 to cooperate with the two locking guide rods 20. Specifically, the two locking guide rods 20 and their corresponding driving assemblies 30 are located on both sides of the supporting frame 10 in a center-symmetrical manner. When the supporting frame 10 sinks to the bottom, the stop portion 22 of one locking guide rod 20 abuts against the locking portion 11 at one corner of the supporting frame 10, and the stop portion 22 of the other locking guide rod 20 abuts against the locking portion 11 at the other corner of the supporting frame 10. The two corners are arranged diagonally, so that the supporting frame 10 is subjected to uniform force when locked, which is conducive to improving the reliability of locking.

[0053] like Figure 5 As shown, a drive motor 2 includes a base 40, a housing 50 that snaps onto the base 40, and a supporting frame 10. The supporting frame 10 is accommodated within a housing cavity defined by the base 40 and the housing 50, movably along the optical axis. The drive motor 2 also includes the locking mechanism 1 described above. It will be appreciated that the locking mechanism 1 prevents the supporting frame 10 from moving within the housing cavity due to external impact, shaking, and other factors when in the reset state, further reducing component wear and extending component life. It also mitigates abnormal noise caused by component collisions, thereby improving the user experience.

[0054] In some embodiments, as Figure 5 As shown, a focus coil 60 is provided on the outer periphery of the carrier frame 10. The drive magnet 32 ​​of the locking mechanism 1 is located between the carrier frame 10 and the drive coil 31. The drive magnet 32 ​​simultaneously provides a magnetic field to the focus coil 60 and the drive coil 31. That is, when the focus coil 60 is energized, it cooperates with the drive coil 31 to generate a Lorentz force, causing the carrier frame 10 to move along the optical axis, i.e., the Z-axis, thereby achieving the lens focusing function. When the drive coil 31 is energized, it cooperates with the drive coil 31 to generate a Lorentz force, causing the locking guide rod 20 to move along the extension direction of the side wall of the carrier frame 10, i.e., the X-axis, thereby locking or unlocking the carrier frame 10. It will be appreciated that the focus coil 60 and the drive coil 31 share the drive magnet 32, which reduces the number of parts, makes the structure more compact, and facilitates reducing the volume of the drive motor 2.

[0055] The above describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and description merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A locking mechanism, characterized in that: include: A load-bearing frame with locking portions at the corners; a locking guide rod, located outside the carrying frame and adapted to be detachably connected to the locking portion; A driving assembly drives the locking guide rod to move in a direction parallel to the side of the carrying frame. When the locking guide rod is horizontally driven to move to the side end of the carrying frame, the locking portion abuts against the locking guide rod to lock the movement of the carrying frame in the axial direction of the optical axis. When the locking guide rod is horizontally driven to deviate from the side end of the carrying frame, the locking portion separates from the locking guide rod to release the carrying frame.

2. The locking mechanism according to claim 1, wherein: The locking guide rod includes a main body and a stop portion, the main body extends along a side direction parallel to the supporting frame, and the driving assembly causes the main body to move horizontally along the side direction parallel to the supporting frame; the stop portion extends from one end of the main body toward the supporting frame.

3. The locking mechanism according to claim 2, wherein: The locking portion is protrudingly provided at the lower end of the carrying frame and extends toward the locking guide rod. When the main body moves toward the middle of the carrying frame, the stop portion moves to the side end of the carrying frame and abuts against the locking portion.

4. The locking mechanism according to claim 2, wherein: The driving assembly includes a driving coil and a driving magnet. The driving coil is fixed on the main body of the locking guide rod. The driving magnet is arranged opposite to the driving coil. After the driving coil is energized, it moves relative to the driving magnet to make the main body move away from the middle of the supporting frame, so that the stop part deviates from the side end of the supporting frame and disengages from the locking part, or to make the main body move toward the middle of the supporting frame, so that the stop part moves to the side end of the supporting frame and abuts against the locking part.

5. The locking mechanism according to claim 4, characterized in that: The driving assembly also includes a reset member, which is connected to the main body of the locking guide rod. When the driving coil is energized, the locking guide rod moves horizontally parallel to the side of the supporting frame. When the driving coil is de-energized, the reset member resets the locking guide rod.

6. The locking mechanism according to claim 5, wherein: The reset member includes a reset spring and a protection box. The reset spring is accommodated in the protection box. Avoidance holes are provided on two opposite side surfaces of the protection box. The main body is suitable for passing through the avoidance holes and moving horizontally relative to the protection box. One end of the reset spring abuts against the inner wall of the protection box, and the other end of the reset spring abuts against the main body. When the driving coil is energized, the locking guide rod moves relative to the protection box and the reset spring is deformed. When the driving coil is de-energized, the reset spring pushes the locking guide rod to reset.

7. The locking mechanism according to claim 6, wherein: The main body of the locking guide rod is in the shape of a cross and is placed parallel to the outer wall of the supporting frame. The locking guide rod includes a first rod segment, a second rod segment and a third rod segment connected in sequence. The stop portion is connected to the side of the first rod segment away from the second rod segment. The first rod segment crosses the protective box from the avoidance through hole. The reset spring is wrapped around the outer circumference of the first rod segment, and the drive coil is wrapped around the outer circumference of the third rod segment. The width of the second rod segment is greater than the width of the reset spring and the width of the drive coil to separate the reset spring and the drive coil.

8. The locking mechanism according to claim 7, wherein: A first limiting wall is provided on the second rod segment. The first limiting wall is located on a side of the second rod segment connected to the first rod segment and is arranged toward the return spring. One end of the return spring abuts against the inner wall of the protection box, and the other end of the return spring abuts against the first limiting wall. The first limiting wall is suitable for moving in the protection box so as to keep the return spring in the protection box.

9. The locking mechanism according to claim 8, wherein: A second limiting wall is provided on the first rod segment. The second limiting wall is located at one end of the first rod segment connected to the stop portion. When the stop portion abuts against the locking portion, the second limiting wall abuts against the outer wall surface of the protection box.

10. The locking mechanism according to any one of claims 1 to 9, characterized in that: There are two locking guide rods and two driving assemblies, which are respectively located on opposite sides of the supporting frame in a centrally symmetrical manner. A locking portion is provided on a set of diagonal corners of the supporting frame to cooperate with the two locking guide rods.

11. A driving motor comprising a base, a housing fastened to the base, and a supporting frame, wherein the supporting frame is accommodated in a receiving cavity defined by the base and the housing so as to be movable along the optical axis, wherein: The drive motor further comprises a locking mechanism as described in any one of claims 1-10.

12. The drive motor according to claim 11, characterized in that A focusing coil is provided on the outer periphery of the carrying frame, and a driving magnet of the locking mechanism is located between the carrying frame and the driving coil. The driving magnet can provide a magnetic field to the focusing coil and the driving coil at the same time.

Images