Locking mechanism and driving motor thereof

Abstract

The invention discloses a locking mechanism which comprises a bearing frame, and locking parts are arranged at the corners of the bearing frame. The locking guide rod is located on the outer side of the bearing frame and suitable for being detachably connected with the locking part; the driving assembly drives the locking guide rod to move in the direction parallel to the side face of the bearing frame, when the locking guide rod is horizontally driven to move to the side end of the bearing frame, the locking part abuts against the locking guide rod to lock the bearing frame to move 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 bearing frame, the locking part is separated from the locking guide rod to lock the bearing frame to move in the axial direction of the optical axis. Therefore, the bearing frame is released. The locking guide rod and the driving assembly are located on the side face 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 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 gradually become an indispensable social and entertainment tool in people's daily lives, and people's requirements for electronic devices are getting higher and higher. In terms of photography, people are increasingly concerned about the performance of camera focus in order to obtain photos with higher imaging quality. Usually, the lens is fixed on the supporting frame, and the driving component drives the supporting frame to move along the optical axis of the lens to achieve the focusing function.

[0003] However, when the focus moving part is in the reset state, it is easily affected by external impact, shaking and other factors. The back and forth movement inside the drive motor causes device wear and shortens the service life of the device. At the same time, the device collides and 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 bearing frame, which occupies a large space and is not conducive to reducing the external dimensions of the driving motor. Summary of the invention

[0005] An object of the present invention is to provide a locking mechanism which can lock a bearing 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 which is small in size and can lock the movement of a focus moving part along the axial direction of its optical axis.

[0007] In order to achieve one of the purposes of the present application, the technical solution adopted by the present invention is: a locking mechanism, including a carrying frame, a locking part is provided at the corner; a locking guide rod is located on the outside of the carrying frame and is suitable for being detachably connected to the locking part; 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 part is abutted against the locking guide rod 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 enables 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 direction of the supporting frame.

[0009] In one embodiment of the present application, the locking portion is protrudingly arranged 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 to abut against the locking portion.

[0010] In one embodiment of the present application, the driving component 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 make the main body 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 make the main body 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 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.

[0012] In one embodiment of the present application, the reset member includes a reset spring and a protection box, the reset spring is accommodated in the protection box, and avoidance holes are opened 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 surface 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.

[0013] In one embodiment of the present application, the main body of the locking guide rod is in a "cross" shape 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 surrounded by the outer periphery of the first rod segment, and the drive coil is wound 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, 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, and the first limiting wall is suitable for moving in the protection box to keep the return spring 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, and when the stop portion abuts against the locking portion, the second limiting wall abuts against the outer wall surface of the protection 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 diagonals of the supporting frame to cooperate with the two locking guide rods.

[0017] In order to achieve another purpose of the present 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 movably accommodated in a receiving cavity defined by the base and the shell along the optical axis, 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 supporting frame, and a driving magnet of the locking mechanism is located between the supporting 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 driving 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 group of locking parts on the diagonals of the load-bearing frame respectively, 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, thereby reducing the number of parts, making the structure more compact, and facilitating 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 diagram of assembling 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. supporting 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. stopper; 30. driving assembly; 31. driving coil; 32. driving magnet; 33. reset member; 331. reset spring; 332. protective box; 333. avoidance through hole; 2. driving motor; 40. base; 50. housing; 60. focusing coil. DETAILED DESCRIPTION

[0029] The present invention is 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 a new embodiment.

[0030] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, 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 the present 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 supporting frame 10, with a locking portion 11 provided at a corner; a locking guide rod 20, located on the outer side of the supporting 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 supporting frame 10, when the locking guide rod 20 is horizontally driven to move to the side end of the supporting frame 10, the locking portion 11 is abutted against the locking guide rod 20, so as to lock the movement of the supporting 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 supporting frame 10, the locking portion 11 is separated from the locking guide rod 20, so as to release the supporting frame 10.

[0033] That is to say, the locking guide rod 20 is located on the outside of the supporting frame 10 and can be linearly moved 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, Figure 1 and Figure 2 As shown, the locking guide rod 20 includes a main body 21 and a stopper 22. The main body 21 extends in a direction parallel to a side surface of the load-bearing frame 10. The driving assembly 30 enables the main body 21 to move horizontally in a direction parallel to the side surface of the load-bearing frame 10. The stopper 22 extends from one end of the main body 21 toward the load-bearing frame 10. That is, the main body 21 of the locking guide rod 20 is located outside the load-bearing frame 10, and the extension direction of the main body 21 is consistent with the extension direction of the load-bearing frame 10. The main body 21 moves linearly along the extension direction of the load-bearing frame 10 through the driving assembly 30, that is, the main body 21 moves along the X-axis direction, so that the arrangement of the main body 21 and the load-bearing frame 10 is more compact, which is conducive to reducing the size of the locking structure. It can be understood that the movement of the main body 21 along the X-axis direction does not interfere with the movement of the load-bearing frame 10 along the Z-axis direction. The stopper 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 stopper 22 approaches or moves away from the locking portion 11 .

[0035] Specifically, when the main body 21 moves in the negative direction of 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 of 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, Figure 1 As shown, the locking portion 11 is protrudingly arranged at the lower end of the carrying frame 10 and extends toward the locking guide rod 20. When the main body 21 moves toward the middle of the carrying frame 10, the stopper 22 moves to the side end of the carrying frame 10 to abut against the locking portion 11. It can be understood that when the carrying frame 10 sinks to the bottom, the stopper 22 of the locking guide rod 20 abuts against the locking portion 11 of the carrying frame 10 to lock the movement of the carrying frame 10 in the axial direction of the optical axis. The locking portion 11 is arranged at the lower end of the carrying frame 10, and the locking guide rod 20 is arranged on one side of the carrying frame 10, and the stopper 22 is located above the locking portion 11 to lock the carrying frame 10, which is conducive to reducing the total height of the locking guide rod 20 and the carrying frame 10, and further reducing the size of the locking mechanism 1.

[0037] In some embodiments, Figure 1 As shown, the driving component 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 in the direction 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 in the direction close to 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 opposite 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 the 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 move in two opposite directions relative to the driving magnet 32, further driving the locking guide rod 20 to move in the negative or positive direction of the X-axis relative to the supporting frame 10, so that the stop portion 22 is away from or close to the corner of the supporting frame 10, and further the stop portion 22 is separated from or offset from the locking portion 11.

[0039] In some embodiments, Figure 1 and Figure 3 As shown, the driving assembly 30 also includes a reset member 33, and the reset member 33 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 load-bearing frame 10 along the negative direction of the X-axis, so that the stopper 22 is separated 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 load-bearing frame 10 along the positive direction of the X-axis, so that the stopper 22 is abutted against the locking portion 11. It is understandable that, when the driving coil 31 is energized, the locking guide rod 20 is moved relative to the load-bearing frame 10 along the positive direction of the X-axis, so that the stopper 22 is abutted 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 load-bearing frame 10 along the negative direction of the X-axis, so that the stopper 22 is separated from 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 to say, 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 powered off, the supporting frame 10 sinks to the bottom, and at this time, the driving coil 31 is also powered off, and the stop portion 22 is pressed against the locking portion 11 through the reset member 33, so that the supporting frame 10 is prevented from moving along the Z axis due to impact or shaking by external force, 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, and further through the reset member 33, the locking guide rod 20 moves along the positive direction of the X-axis, so as to avoid changing 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 reliability.

[0043] In some embodiments, 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 protection box 332 has two opposite side surfaces 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 abuts against the inner wall of the protection box 332, and the other end of the reset spring 331 abuts against the main body 21, and when the drive coil 31 is energized, the locking guide rod 20 moves relative to the protection box 332 and the reset spring 331 is deformed, and when the drive coil 31 is de-energized, the reset spring 331 pushes the locking guide rod 20 to reset.

[0044] That is, at least part of the main body 21 is suitable for passing through the avoidance through hole 333 on the protection box 332 to be accommodated in the protection box 332, and the main body 21 can move relative to the protection box 332 through the action of the driving coil 31 or the reset spring 331. Specifically, one end of the reset spring 331 abuts against the inner wall of the protection box 332, and the other end of the reset spring 331 abuts against the main body 21, so as to be elastically deformed in the protection box 332. When the driving coil 31 is energized, the locking guide rod 20 moves along the negative direction of the X-axis, so that the stopper 22 is separated from the locking part 11, and the reset spring 331 is compressed, so that the reset spring 331 is stored; when the driving coil 31 is de-energized, the reset spring 331 stretches and releases energy, so as to push the locking guide rod 20 to move along the positive direction of the X-axis, so that the stopper 22 abuts against the locking part 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 return spring 331 acts on the locking guide rod 20 along the X-axis direction.

[0046] In some embodiments, Figure 2 and Figure 3 As shown, the main body 21 of the locking guide rod 20 is in a "cross" shape 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 which are connected in sequence. The stop portion 22 is connected to the first rod segment 211 on a side away from the second rod segment 213. The first rod segment 211 crosses the protection box 332 from the avoidance through hole 333. The reset spring 331 is surrounded by 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 reset spring 331 and the width of the drive coil 31 to separate the reset spring 331 and the drive coil 31.

[0047] That is to say, Figure 3As shown, the first rod segment 211 of the locking guide rod 20 is suitable for passing through the avoidance through hole 333 and being accommodated in the protection box 332, so that the locking guide rod 20 is suitable for moving relative to the protection box 332 along the X-axis direction, and the reset spring 331 surrounds the circumference of the first rod segment 211. Further, the width of the second rod segment 213 is greater than the width of the reset spring 331, which is conducive to making one end of the reset spring 331 abut against the second rod segment 213. The driving coil 31 is wound and fixed on the third rod segment 215. When the driving coil 31 is energized and cooperates with the driving magnet 32 ​​to generate the Lorentz force, the locking guide rod 20 can move along the X-axis direction together with the driving coil 31. Further, the width of the second rod segment 213 is greater than the width of the driving coil 31, which is conducive to providing a reference when installing the driving coil 31 and facilitating the installation of the driving coil 31. At the same time, the second rod segment 213 can separate the reset spring 331 and the driving 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 reduce the size of the locking mechanism 1.

[0050] In some embodiments, 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 a 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 protection box 332, so that the reset spring 331 is maintained in the protection box 332. That is to say, 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 protection box 332, so that the reset spring 331 is still fully accommodated in the protection box 332 in its longest state.

[0051] In some embodiments, 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 to say, 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 through the action of the driving coil 31, the stopper 22 is away from the corner of the supporting frame 10, and the second limiting wall 212 is away from the protection box 332; when the main body 21 moves along the positive direction of the X-axis through the reset spring 331, the stopper 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 surface of the protection box 332, so as to prevent the reset spring 331 from continuing to extend, and at this time, the stopper 22 abuts against the locking part 11. In an optional embodiment, the second limiting wall 212 is coplanar with the stopper 22, so as to enhance the structural strength of the stopper 22, which is conducive to improving the reliability of the locking mechanism 1.

[0052] In some embodiments, Figure 4As shown, there are two locking guide rods 20 and two driving assemblies 30, which are respectively located on opposite sides of the load-bearing frame 10 in a center-symmetrical manner. A locking portion 11 is provided on a set of diagonal corners of the load-bearing 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 load-bearing frame 10 in a center-symmetrical manner. When the load-bearing frame 10 sinks to the bottom, the stopper 22 of one locking guide rod 20 abuts against the locking portion 11 of one corner of the load-bearing frame 10, and the stopper 22 of the other locking guide rod 20 abuts against the locking portion 11 of the other corner of the load-bearing frame 10. The two corners are arranged diagonally, so that the load-bearing 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 driving motor 2 includes a base 40, a shell 50 buckled on the base 40, and a bearing frame 10, wherein the bearing frame 10 is movably accommodated in a receiving cavity defined by the base 40 and the shell 50 along the optical axis, and the driving motor 2 also includes the locking mechanism 1 as described above. It can be understood that the locking mechanism 1 can prevent the bearing frame 10 from moving in the receiving cavity under the influence of external force impact, shaking and other factors when it is in the reset state, further reducing the wear of the device, extending the service life of the device, and reducing the abnormal noise caused by the collision of the device, thereby improving the user experience.

[0054] In some embodiments, Figure 5 As shown, a focus coil 60 is provided on the periphery of the carrier frame 10, and the driving magnet 32 ​​of the locking mechanism 1 is located between the carrier frame 10 and the driving coil 31, so that the driving magnet 32 ​​can provide a magnetic field to the focus coil 60 and the driving coil 31 at the same time. That is to say, when the focus coil 60 is energized, it can cooperate with the driving coil 31 to generate a Lorentz force, so that the carrier frame 10 moves along the optical axis, that is, the Z-axis direction, so as to achieve the focusing function of the lens. When the driving coil 31 is energized, it can cooperate with the driving coil 31 to generate a Lorentz force, so that the locking guide rod 20 moves along the extension direction of the side wall of the carrier frame 10, that is, the X-axis direction, so as to achieve the locking or unlocking of the carrier frame 10. It can be understood that the focus coil 60 and the driving coil 31 share the driving magnet 32, so as to reduce the number of parts, make the structure more compact, and help reduce 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 above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention to be protected. The scope of protection claimed by the present invention is defined by the attached 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 load-bearing 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 driven horizontally 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 driven horizontally 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, characterized in that: The locking guide rod includes a main body and a stopper, the main body extends along a side direction parallel to the supporting frame, and the driving assembly enables the main body to move horizontally along the side direction parallel to the supporting frame; the stopper extends from one end of the main body toward the supporting frame.

3. The locking mechanism according to claim 2, characterized in that: The locking portion is protrudingly arranged 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 to abut against the locking portion.

4. The locking mechanism according to claim 2, characterized in that: 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 stopper 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 stopper 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, characterized in that: The reset member includes a reset spring and a protection box, the reset spring is accommodated in the protection box, and avoidance holes are opened on the opposite sides 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, characterized in that: 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 which are connected in sequence. The stop portion is connected to a side of the first rod segment away from the second rod segment. The first rod segment crosses the protection box from the avoidance through hole. The reset spring is surrounded by the outer periphery of the first rod segment. The drive coil is wound 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 so as to separate the reset spring and the drive coil.

8. The locking mechanism according to claim 7, characterized in that: The second rod segment is provided with a first limiting wall, which 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, and 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, characterized in that: The first rod segment is provided with a second limiting wall, which is located at one end of the first rod segment connected to the stopper, and when the stopper 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 shell buckled on the base, and a bearing frame, wherein the bearing frame is movably accommodated in a receiving cavity defined by the base and the shell along an 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 focus coil is disposed 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, so that the driving magnet can provide a magnetic field to the focus coil and the driving coil at the same time.

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