A locking device, camera module and mobile terminal

Abstract

The present invention discloses a locking device, a camera module and a mobile terminal. The locking device includes a sleeve, a telescopic part inserted in the sleeve and a power mechanism. The power mechanism is used to drive the telescopic part to extend to connect with the lens assembly, so as to lock the lens assembly at this position to prevent the lens assembly from shaking or swinging; or to drive the telescopic part to retract to separate from the lens assembly, so that the lens assembly can leave the current position, which is convenient for moving the lens assembly. By utilizing the locking function of the locking device, the telescopic part can be locked to achieve connection or separation with the lens assembly and maintain this state without continuous power supply. The power mechanism only needs to drive the telescopic part when switching between the two states. In this way, under the premise of realizing the function of locking the position of the lens assembly, the structure of the locking device is simplified and the energy consumption of the locking device is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of camera equipment, and in particular to a locking device, a camera module and a mobile terminal. Background Art

[0002] The camera module used in mobile terminals (such as mobile phones, tablet computers, etc.) has a lens assembly that is driven by a driving device to achieve framing, focusing, and other effects. After the lens assembly moves to a certain position, in order to keep the lens assembly in that position, it is necessary to use the driving device to lock the lens assembly to avoid the situation where the lens assembly may move when the user shakes the mobile terminal during use, affecting the framing and focusing effects. In the related art, the driving device needs to be continuously powered to keep the lens assembly in that position, resulting in high energy consumption of the camera module. Summary of the invention

[0003] The embodiment of the present invention discloses a locking device, which can lock the position of a lens assembly without continuous power supply.

[0004] In order to achieve the above-mentioned object, in a first aspect, the present invention discloses a locking device, which is applied to a camera module, wherein the camera module comprises a housing, a driving mechanism and a lens assembly arranged in the housing, wherein the driving mechanism is connected to the lens assembly, and the driving mechanism is used to drive the lens assembly to move, and the locking device comprises:

[0005] A sleeve, the sleeve is used to be connected to the housing, and the axial direction of the sleeve includes a first direction and a second direction opposite to the first direction;

[0006] a telescopic portion, the telescopic portion being movably arranged on the sleeve, and when the lens assembly moves to a position corresponding to the telescopic portion, the telescopic portion moves relative to the sleeve along the first direction to be connected with the lens assembly, and when the telescopic portion moves relative to the sleeve along the second direction to be separated from the lens assembly, the lens assembly can move to be staggered with the telescopic portion;

[0007] The power mechanism is connected to the telescopic part and is used to push the telescopic part so that the telescopic part moves relative to the sleeve along the first direction or the second direction.

[0008] As an optional implementation, in an embodiment of the present invention, the inner wall of the sleeve is provided with a plurality of protrusions, and the plurality of protrusions are distributed at intervals along the circumference of the sleeve, and an accommodating space is formed between a side of the plurality of protrusions facing away from the power mechanism and the inner wall of the sleeve, and the accommodating space is used to accommodate the telescopic portion, and a first clamping groove is formed between two adjacent protrusions, and the first clamping groove is connected to the accommodating space, and a second clamping groove is provided on a side of the protrusion facing away from the power mechanism, and along the axial direction of the sleeve, the depth of the first clamping groove is greater than the depth of the second clamping groove, and the first clamping groove and the second clamping groove are distributed along the circumference of the sleeve, and a first clamping portion is provided on the outer periphery of the telescopic portion, and the first clamping portion can be movably clamped in the first clamping groove or the second clamping groove;

[0009] The power mechanism pushes the telescopic part to move along the first direction and causes the telescopic part to rotate, so that when the telescopic part is connected to the lens assembly, the first engaging part rotates to engage with the second engaging slot, or, when the power mechanism pushes the telescopic part to move along the second direction and causes the telescopic part to rotate to the contracted state, the first engaging part rotates to engage with the first engaging slot.

[0010] As an optional implementation, in an embodiment of the present invention, the first card slots and the second card slots are both multiple, the number of the second card slots is the same as the number of the first card slots, and along the circumference of the sleeve, the multiple first card slots are distributed at intervals, the multiple second card slots are distributed at intervals, and the multiple first card slots and the multiple second card slots are alternately arranged.

[0011] As an optional implementation, in an embodiment of the present invention, there are multiple first engaging parts, and the number of the first engaging parts is the same as the number of the first card slots, the multiple first card slots are evenly spaced, and the multiple second card slots are evenly spaced, so that when the telescopic part rotates at any rotation angle relative to the sleeve, the multiple first engaging parts are respectively engaged with the multiple first card slots, or are respectively engaged with the multiple second card slots.

[0012] As an optional implementation, in an embodiment of the present invention, a surface of the protrusion facing away from the power mechanism includes a first guide surface located in the second slot and a second guide surface located outside the second slot, and the first guide surface and the second guide surface are inclined along the second direction to guide the first engaging portion to rotate;

[0013] The first engaging portion is provided with a third guide surface corresponding to the first guide surface. When the pushing shaft pushes the first engaging portion to disengage from any of the first slots, the third guide surface is connected to the first guide surface, and is rotated and engaged with the step under the guidance of the first guide surface, so that the telescopic portion moves along the first direction until it is connected to the lens assembly; when the pushing shaft pushes the first engaging portion to disengage from the step, the third guide surface is connected to the second guide surface, and is rotated and engaged with another of the first slots under the guidance of the second guide surface, so that the telescopic portion moves along the second direction until it is separated from the lens assembly.

[0014] As an optional implementation, in an embodiment of the present invention, the locking device also includes a pushing shaft, which is at least partially located in the sleeve and connected to the telescopic part. The power mechanism is connected to the telescopic part through the pushing shaft. The pushing shaft can move axially along the sleeve under the driving action of the power mechanism, so that the telescopic part moves axially along the sleeve and rotates around the axis of the sleeve, so that the telescopic part is connected to or separated from the lens assembly.

[0015] As an optional implementation, in the embodiment of the present invention, a plurality of second engaging portions are provided at one end of the pushing shaft connected to the telescopic portion, the second engaging portions protrude from the outer peripheral surface of the pushing shaft, and the second engaging portions are used to be connected to the first engaging portions;

[0016] The protrusion is further provided with a plurality of third card slots, the number of the third card slots is the same as the number of the first card slots, the third card slots are provided between two adjacent first card slots and are parallel to the first card slots, and the third card slots are connected to the second card slots;

[0017] The number of the second engaging parts is the sum of the number of the first engaging slots and the third engaging slots, and the plurality of second engaging parts are respectively slidably engaged with the first engaging slots and the third engaging slots.

[0018] As an optional implementation, in an embodiment of the present invention, the second snap-fitting portion has a connecting surface corresponding to the first snap-fitting portion, and the connecting surface includes two inclined surfaces connected in sequence at an angle, and the connecting position of the two inclined surfaces forms a convex ridge, and the convex ridge is used to connect with the first snap-fitting portion.

[0019] As an optional implementation, in an embodiment of the present invention, a first connecting block is provided at one end of the driving shaft located outside the sleeve, the first connecting block is hollow and forms an installation cavity, the power mechanism includes a magnetic part and a coil, the installation cavity is used to accommodate the magnetic part, the coil is arranged on the shell corresponding to the magnetic part, and the coil is spaced apart from the first connecting block.

[0020] As an optional implementation, in an embodiment of the present invention, the power mechanism also includes a power component and a reset component, the telescopic part has a first end for connecting to the lens assembly and a second end opposite to the first end, the power component is connected to the second end, and is used to provide a driving force for the telescopic part along the first direction, the first end is located outside the sleeve, the reset component is connected to the first end and the sleeve, and the reset component is used to provide a restoring force for the telescopic part along the second direction to separate the telescopic part from the lens assembly.

[0021] As an optional implementation, in an embodiment of the present invention, the telescopic portion includes a shaft rod and a locking portion connected in sequence, the shaft rod is movably inserted into the sleeve, and one end of the shaft rod is connected to the power mechanism, and the locking portion is arranged at the other end of the shaft rod, the locking portion protrudes from the outer periphery of the shaft rod and is located outside the sleeve, and the locking portion is used to connect or separate with the lens assembly.

[0022] As an optional implementation, in an embodiment of the present invention, the power mechanism includes a power component and a reset component, the power component is connected to one end of the shaft, and is used to provide a driving force for the telescopic part along the first direction, the reset component is sleeved on the outer periphery of the shaft, and is connected between the locking part and the sleeve, and the reset component is used to provide a restoring force for the telescopic part along the second direction so as to separate the telescopic part from the lens assembly.

[0023] As an optional implementation, in an embodiment of the present invention, an annular step is provided at one end of the sleeve facing the locking portion, the annular step protrudes from the outer circumference of the sleeve, and the annular step is provided with an accommodating groove corresponding to the locking portion to accommodate at least a portion of the reset member.

[0024] In a second aspect, the present invention further discloses a camera module, comprising a housing, a lens assembly and a locking device as described in the first aspect, wherein the lens assembly and the locking device are arranged in the housing, and the locking device is arranged corresponding to the lens assembly.

[0025] As an optional implementation, in an embodiment of the present invention, the lens assembly is provided with a second connecting block, the second connecting block protrudes from the lens assembly to correspond to the telescopic part, and the second connecting block is provided with a locking groove, and the locking groove is used to accommodate the telescopic part when the telescopic part is extended.

[0026] In a third aspect, the present invention further discloses a mobile terminal, comprising a terminal body and a camera module as described in the second aspect, wherein the camera module is arranged on the terminal body.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] A locking device is provided in an embodiment of the present invention, and enables a telescopic part to move relative to a sleeve so that the telescopic part switches between an extended state and a retracted state. When the telescopic part switches to the extended state, the telescopic part is connected to the lens assembly and the lens assembly is locked at this position to prevent the lens assembly from shaking or swinging, thereby improving the reliability of the camera module. When the lens assembly leaves this position, the telescopic part switches to a retracted state and is separated from the lens assembly to facilitate the movement of the lens assembly. By utilizing the locking function of the locking device, the telescopic part can be locked to achieve connection or separation with the lens assembly and maintain this state without continuous power supply to it. The power mechanism only needs to drive the telescopic part when switching between the two states. In this way, under the premise of realizing the function of locking the position of the lens assembly, the structure of the locking device is simplified and the energy consumption of the locking device is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 is a schematic structural diagram of a camera module provided by an embodiment of the present invention;

[0031] Figure 2 is a schematic structural diagram of a locking device provided by an embodiment of the present invention;

[0032] Figure 3 is a schematic diagram of the structural decomposition of a locking device provided by an embodiment of the present invention;

[0033] Figure 4 The sleeve edge provided by the embodiment of the present invention Figure 2 AA section view in;

[0034] Figure 5 is a schematic structural diagram of a telescopic portion provided by an embodiment of the present invention;

[0035] Figure 6 is a schematic structural diagram of a driving shaft provided by an embodiment of the present invention;

[0036] Figure 7 It is a schematic structural diagram of the driving shaft and the sleeve provided by the present invention in an assembled state;

[0037] Figure 8 is a schematic diagram of the structure of a lens assembly provided by an embodiment of the present invention;

[0038] Fig. 9 It is a schematic diagram of the structure of a mobile terminal provided by an embodiment of the present invention.

[0039] Icons: 100, locking device; 10, sleeve; 13, convex block; 131, first slot; 132, second slot; 133, first guide surface; 134, second guide surface; 136, third slot; 14, accommodating space; 15, annular step; 150, accommodating groove; 20, telescopic part; 21, first engaging part; 210, third guide surface; 22, first end; 23, second end; 24, shaft; 25, Locking part; 30, power mechanism; 31, magnetic part; 32, coil; 33, power component; 34, reset part; 40, driving shaft; 41, second engaging part; 410, inclined surface; 42, first connecting block; 420, mounting cavity; 200, camera module; 201, housing; 202, lens assembly; 2021, second connecting block; 2021a, locking groove; 300, mobile terminal; 301, terminal body. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the present invention, the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0042] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0045] The technical solution of the present invention will be further described below in conjunction with embodiments and drawings.

[0046] In a first aspect, this embodiment provides a locking device 100, such as Figure 1 As shown, the locking device 100 can be applied to the camera module 200. Figures 1 to 3 The camera module 200 includes a shell 201 and a driving mechanism and a lens assembly 202 arranged in the shell 201. The driving mechanism (not shown) is connected to the lens assembly 202. The driving mechanism is used to drive the lens assembly 202 to move. For example, the lens assembly 202 can achieve framing, focusing and other effects of the camera module 200 by rotation, translation and the like.

[0047] The locking device 100 includes a sleeve 10, a telescopic portion 20 and a power mechanism 30. The sleeve 10 is used to connect with the housing 201, and the axial direction of the sleeve 10 includes a first direction (such as Figure 2 The positive direction of the x-axis shown in FIG. 1 ) and the second direction opposite to the first direction (as shown in FIG. Figure 2 The telescopic part 20 is movably arranged in the sleeve 10. When the lens assembly 202 moves to the corresponding setting of the telescopic part 20, the telescopic part 20 moves relative to the sleeve 10 along the first direction to connect with the lens assembly 202. When the telescopic part 20 moves relative to the sleeve 10 along the second direction to separate from the lens assembly 202, the lens assembly 202 can move to be staggered with the telescopic part 20. The power mechanism 30 is connected to the telescopic part 20 and is used to push the telescopic part 20 so that the telescopic part 20 moves relative to the sleeve 10 along the first direction or the second direction.

[0048] That is, the telescopic part 20 has two states: extended and retracted. That is, when the telescopic part 20 moves along the first direction and is connected to the lens assembly 202, the telescopic part 20 is in the extended state; when the telescopic part 20 moves along the second direction to separate from the lens assembly 202, the telescopic part 20 is in the retracted state. When the lens assembly 202 moves to the corresponding telescopic part 20 under the driving action of the driving mechanism, for example, the lens assembly 202 is translated to be close to the telescopic part 20, or the lens assembly 202 is rotated to a certain position, the power mechanism 30 drives the telescopic part 20 to switch to the extended state, so that the telescopic part 20 can be connected to the lens assembly 202, and the lens assembly 202 is locked at this position to prevent the lens assembly 202 from shaking or swinging; when the lens assembly 202 leaves the current position, before that, the telescopic part 20 is switched to the recovery state to separate it from the lens assembly 202, so that the lens assembly 202 can leave (for example, translate away or rotate away) the current position, so that the lens assembly 202 does not correspond to the telescopic part 20, which is convenient for moving the lens assembly 202 and avoiding friction between the lens assembly 202 and the telescopic part 20 when the lens assembly 202 moves, thereby improving the service life of the lens assembly 202.

[0049] By providing the sleeve 10 and the telescopic part 20, and making the telescopic part 20 move relative to the sleeve 10, so that the telescopic part 20 switches between the extended state and the retracted state, when the telescopic part 20 switches to the extended state, the telescopic part 20 is connected to the lens assembly 202, and the lens assembly 202 is locked at this position to prevent the lens assembly 202 from shaking or swinging, thereby improving the reliability of the camera module 200. When the lens assembly 202 leaves this position, the telescopic part 20 switches to the retracted state and separates from the lens assembly 202, so as to facilitate the movement of the lens assembly 202. In this way, by utilizing the locking function of the locking device 100, the telescopic part 20 can be locked to achieve connection or separation with the lens assembly 202 and maintain this state, without the need to continuously power it, and the power mechanism 30 only needs to drive the telescopic part 20 when the two states are switched. In this way, under the premise of realizing the position locking function of the lens assembly 202, the structure of the locking device 100 is simplified and the energy consumption of the locking device 100 is reduced.

[0050] Exemplarily, the power mechanism 30 may be a cylinder, a motor, or a component of a coil and a magnetic part, etc., which is connected to the telescopic part 20 by using the telescopic arm of the cylinder or the output shaft of the motor, or a coil or a magnetic part is set on the telescopic part 20, and the other is set outside the telescopic part, so as to realize the movement of the telescopic part 20 along the first direction or the second direction. Among them, when the sleeve 10 is set in the shell 201, in some examples, the sleeve 10 can be directly set in the shell 201 itself, and in other examples, it can also be indirectly connected to the shell 201 through a structure such as a connecting bracket. Figure 2The housing 201 shown may be a part of the housing 201 itself, and the part protrudes toward the lens assembly 202, so as to facilitate the installation of the sleeve 10 and make the telescopic part 20 correspond to the lens assembly 202. The present embodiment does not limit the specific position where the sleeve 10 is installed in the housing 201, and the sleeve 10 only needs to be installed at a distance from the lens assembly 202, so as to facilitate the connection and separation of the telescopic part 20 and the lens assembly 202.

[0051] It can be understood that the lens assembly 202 includes a lens barrel and a lens (not shown), and the lens includes a lens, a plane mirror, a prism, etc. to realize the camera function of the camera module.

[0052] For some examples, see Figures 4 to 5 A plurality of protrusions 13 are provided on the inner wall of the sleeve 10, and the plurality of protrusions 13 are distributed at intervals along the circumference of the sleeve 10. An accommodating space 14 is formed between a side of the plurality of protrusions 13 facing away from the power mechanism 30 and the inner wall of the sleeve 10. The accommodating space 14 is used to accommodate the telescopic portion 20. A first card groove 131 is formed between two adjacent protrusions 13, and the first card groove 131 is connected to the accommodating space 14. A second card groove 132 is provided on a side of the protrusion 13 facing away from the power mechanism 30. Along the axial direction of the sleeve 10, the depth of the first card groove 131 is greater than the depth of the second card groove 132. The first card groove 131 and the second card groove 132 are distributed along the circumference of the sleeve 10. A first clamping portion 21 is provided on the outer periphery of the telescopic portion 20, and the first clamping portion 21 can be movably clamped in the first card groove 131 or the second card groove 132. The power mechanism 30 pushes the telescopic part 20 to move along the first direction and rotates the telescopic part 20, so that when the telescopic part 20 is connected to the lens assembly 202, the first engaging part 21 rotates to engage with the second engaging slot 132, or, when the power mechanism 30 pushes the telescopic part 20 to move along the second direction and rotates the telescopic part 20 to a contracted state, the first engaging part 21 rotates to engage with the first engaging slot 131.

[0053] By providing the first card slot 131 and the second card slot 132 of different lengths in the sleeve 10, the first engaging portion 21 is engaged with the first card slot 131 and the second card slot 132 respectively, so that, on the one hand, the telescopic portion 20 can have two states, thereby realizing the setting of the extended state and the retracted state of the telescopic portion 20. That is, one is that when the telescopic portion 20 is engaged with the first card slot 131, a longer part of the second end 23 of the telescopic portion 20 is accommodated in the sleeve 10, and at this time, the length of the first end 22 extending from the sleeve 10 is small, so that the telescopic portion 20 is separated from the lens assembly 202, and the movement of the lens assembly 202 is facilitated; the other state is that the telescopic portion 20 is engaged with the second card slot 132, and at this time, the first end 22 of the telescopic portion 20 has a larger extended length relative to the sleeve 10, and can be connected to the lens assembly 202 to lock the lens assembly 202.

[0054] On the other hand, when not subjected to the driving force of the power mechanism 30, the first engaging portion 21 can maintain its state in the first engaging slot 131 or the second engaging slot 132 and will not actively slip out of the slot, thereby realizing the function of locking the telescopic portion 20 so that it can remain in the extended state or the retracted state.

[0055] Optionally, the protrusion 13 and the sleeve 10 may be integrally formed, or the protrusion 13 may be adhered to the inner wall of the sleeve 10 after the sleeve 10 is formed.

[0056] In some embodiments, there are multiple first card slots 131 and multiple second card slots 132, the number of second card slots 132 is the same as the number of first card slots 131, and along the circumference of the sleeve 10, multiple first card slots 131 are distributed at intervals, multiple second card slots 132 are distributed at intervals, and multiple first card slots 131 and multiple second card slots 132 are alternately arranged.

[0057] By providing a plurality of first card slots 131 and second card slots 132, the telescopic part 20 can continuously rotate in the sleeve 10 along the circumference of the sleeve 10 (i.e., rotate around the x-axis), so that the telescopic part 20 can alternately switch between the extended state and the retracted state, thereby simplifying the driving action of the power mechanism 30 on the telescopic part 20.

[0058] In some embodiments, there are multiple first engaging portions 21, and the number of the first engaging portions 21 is the same as the number of the first engaging slots 131. The multiple first engaging slots 131 are evenly spaced, and the multiple second engaging slots 132 are evenly spaced, so that when the telescopic portion 20 rotates at any rotation angle relative to the sleeve 10, the multiple first engaging portions 21 are respectively engaged with the multiple first engaging slots 131, or are respectively engaged with the multiple second engaging slots 132.

[0059] By providing a plurality of first engaging portions 21 corresponding to a plurality of first engaging grooves 131, the contact area between the first engaging portion 21 and the first engaging groove 131 (or the second engaging groove 132) can be increased, and the first engaging portion 21 can be evenly distributed on the periphery of the telescopic portion 20, thereby improving the stability and balance of the telescopic portion 20 when rotating in the sleeve 10.

[0060] In some embodiments, a surface of the protrusion 13 facing away from the power mechanism 30 includes a first guide surface 133 located in the second slot 132 and a second guide surface 134 located outside the second slot 132, and the first guide surface 133 and the second guide surface 134 are inclined along the second direction to guide the first engaging portion 21 to rotate. The first engaging portion 21 is provided with a third guide surface 210 corresponding to the first guide surface 133. When the driving shaft 40 pushes the first engaging portion 21 to disengage from any first slot 131, the third guide surface 210 is connected to the first guide surface 133, and rotates and engages with the second slot 132 under the guidance of the first guide surface 133, so that the telescopic portion 20 moves along the first direction until it is connected to the lens assembly 202; when the driving shaft 40 pushes the first engaging portion 21 to disengage from the second slot 132, the third guide surface 210 is connected to the second guide surface 134, and rotates and engages with another first slot 131 under the guidance of the second guide surface 134, so that the telescopic portion 20 moves along the second direction until it is separated from the lens assembly 202.

[0061] The locking device 100 is further provided with a reset member 34, which is connected to the telescopic part 20 and the sleeve 10, and is used to provide a restoring force along the second direction for the telescopic part 20. By providing the first guide surface 133, the second guide surface 134 and the third guide surface 210, the third guide surface 210 can be matched with the first guide surface 133 or the second guide surface 134, and the reset member 34 is used to provide an extrusion force along the second direction for the telescopic part 20. At this time, the surface support force generated by the first guide surface 133 (the second guide surface 134) on the third guide surface 210 has a component force along the circumferential direction of the telescopic part 20, which can make the telescopic part 20 automatically rotate in the sleeve 10 along the circumferential direction of the sleeve 10, thereby realizing the automatic switching of the first engaging part 21 between the first card slot 131 and the second card slot 132.

[0062] For some examples, see Figure 6 to Figure 7 The locking device 100 also includes a driving shaft 40, which is at least partially located in the sleeve 10 and connected to the telescopic part 20. The power mechanism 30 is connected to the telescopic part 20 through the driving shaft 40. The driving shaft 40 can move along the axial direction of the sleeve 10 under the driving action of the power mechanism 30, so that the telescopic part 20 moves along the axial direction of the sleeve 10 and rotates around the axis of the sleeve 10, so that the telescopic part 20 is connected or separated from the lens assembly 202.

[0063] Since the available space in the sleeve 10 is small and the first engaging portion 21 of the telescopic portion 20 is engaged in the first engaging groove 131 or the second engaging groove 132, the output end of the power mechanism 30 is difficult to extend into the sleeve 10 and directly contact the first engaging portion 21. Therefore, by setting a pushing shaft 40, the power mechanism 30 can be connected to the telescopic portion 20. Under the premise that the power mechanism 30 does not extend into the sleeve 10, the power of the power mechanism 30 can extend into the sleeve 10, so that the power mechanism 30 can transmit the driving force to the telescopic portion 20 to drive the telescopic portion 20.

[0064] In some embodiments, one end of the pushing shaft 40 connected to the telescopic portion 20 is provided with a plurality of second engaging portions 41, the second engaging portions 41 protrude from the outer circumferential surface of the pushing shaft 40, and the second engaging portions 41 are used to connect with the first engaging portion 21. The protrusion 13 is also provided with a plurality of third engaging grooves 136, the number of the third engaging grooves 136 is the same as the number of the first engaging grooves 131, the third engaging grooves 136 are provided between two adjacent first engaging grooves 131 and are parallel to the first engaging grooves 131, and the third engaging grooves 136 are connected with the second engaging grooves 132. The number of the second engaging portions 41 is the sum of the number of the first engaging grooves 131 and the third engaging grooves 136, and the plurality of second engaging portions 41 are slidably engaged with the first engaging grooves 131 and the third engaging grooves 136, respectively.

[0065] The second engaging portion 41 can realize a stable connection between the pushing shaft 40 and the telescopic portion 20, so that the pushing shaft 40 can provide a driving force along the first direction to the telescopic portion 20. The number of the second engaging portions 41 is set to be twice that of the first engaging portions 21, so that no matter whether the first engaging portion 21 is in the first engaging groove 131 or the second engaging groove 132, when the pushing shaft 40 is pushed along the first direction, there can always be a second engaging portion 41 corresponding to the first engaging portion 21, and the second engaging portion 41 is connected to the first engaging portion 21, so as to push the first engaging portion 21 out of the first engaging groove 131 or the second engaging groove 132. By engaging the second engaging portion 41 with the first engaging groove 131 or the third engaging groove 136, it is possible to provide a guide for the pushing shaft 40 to move in the sleeve 10, and prevent the second engaging portion 41 from rotating relative to the sleeve 10, thereby improving the stability of the pushing shaft 40 during the pushing process.

[0066] In some embodiments, the second engaging portion 41 has a connecting surface corresponding to the first engaging portion 21 , and the connecting surface includes two inclined surfaces 410 connected in sequence at an angle, and the connecting position of the two inclined surfaces 410 forms a convex ridge, which is used to connect to the first engaging portion 21 .

[0067] By setting the surface of the second engaging portion 41 as two inclined surfaces 410, the contact area between the second engaging portion 41 and the third guide surface 210 is reduced. In this way, the degree of friction or surface adhesion between the first engaging portion 21 and the second engaging portion 41 when they are in contact can be reduced, which is beneficial to improving the reliability of the disengagement of the first engaging portion 21 from the first slot 131 or the second slot 132.

[0068] In some embodiments, a first connecting block 42 is provided at one end of the driving shaft 40 located outside the sleeve 10. The first connecting block 42 is hollow and forms an installation cavity 420. The power mechanism 30 includes a magnetic part 31 and a coil 32. The installation cavity 420 is used to accommodate the magnetic part 31. The coil 32 is arranged in the shell 201 corresponding to the magnetic part 31, and the coil 32 is spaced apart from the first connecting block 42.

[0069] The first connecting block 42 can provide space for the installation of the magnetic part 31, so that the driving shaft 40 can be connected to the power mechanism 30, so that the driving shaft 40 can move under the drive of the power mechanism 30. The installation cavity 420 can be used to accommodate the magnetic part 31, and the magnetic part 31 is not exposed, thereby improving the reliability of the operation process of the locking device 100. By setting the coil 32 and cooperating with the magnetic part 31, the driving shaft 40 can be driven by magnetic drive, so that the driving shaft 40 can be driven without contacting the power mechanism 30, which is convenient for the separate design and installation of the driving shaft 40 and the power mechanism 30.

[0070] In some embodiments, please combine Figure 3 and Figure 6 The power mechanism 30 also includes a power component 33 and a reset component 34. The telescopic part 20 has a first end 22 for connecting to the lens assembly 202 and a second end 23 opposite to the first end 22. The power component 33 is connected to the second end 23 and is used to provide a driving force for the telescopic part 20 along a first direction. The first end 22 is located outside the sleeve 10. The reset component 34 is connected to the first end 22 and the sleeve 10. The reset component 34 is used to provide a restoring force for the telescopic part 20 along a second direction so as to separate the telescopic part 20 from the lens assembly 202.

[0071] That is, when the telescopic part 20 is extended along the first direction and connected to the lens assembly 202, the reset member 34 is in a stretched state. At this time, the reset member 34 has potential energy to recover along the second direction. When the power component 33 drives the driving shaft 40 along the first direction again, the driving shaft 40 presses the telescopic part 20 along the first direction and causes the first engaging part 21 to disengage from the second engaging groove 132. At this time, the reset member 34 generates a pulling force along the second direction on the telescopic part 20, so that the telescopic part 20 moves along the second direction. The first engaging part 21 slides into the first engaging groove 131 under the cooperation of the third guide surface 210 and the second guide surface 134, so as to separate the telescopic part 20 from the lens assembly 202.

[0072] The power component 33 and the reset member 34 can realize the driving force in the first direction and the restoring force in the second direction for the telescopic part 20. Specifically, the power component 33 includes the magnetic member 31 and the coil 32. In this way, the power component 33 only needs to drive the telescopic part 20 in one direction (i.e., the first direction). For the power component 33, there is no need to consider the problem of driving in the second direction. Instead, the telescopic part 20 can be moved in two directions in cooperation with the reset function of the reset member 34. In this way, the setting of the power mechanism 30 can be simplified, making the overall structure of the locking device 100 more compact and simple.

[0073] Exemplarily, the reset element 34 may be a spring, a spring sheet or the like.

[0074] The working process of the locking device 100 is as follows:

[0075] When the lens assembly 202 moves to correspond to the telescopic portion 20, the coil 32 of the power mechanism 30 is energized and generates a force with the magnetic member 31 to make the driving shaft 40 move along the first direction. At this time, the first engaging portion 21 is located in the first engaging groove 131, and the inclined surface of the second engaging portion 41 located in the first engaging groove 131 contacts the first engaging portion 21. The first engaging portion 21 is pushed away from the first engaging groove 131 by the second engaging portion 41. The first engaging portion 21 is moved away from the first engaging groove 131 by the third guide surface 210. The first engaging portion 21 is rotated under the guidance of the first guide surface 133 so that the first engaging portion 21 corresponds to the second engaging groove 132 and slides into the second engaging groove 132. Since the first guide surface 133 and the second guide surface 134 are discontinuous, the first engaging portion 21 can be locked in the second engaging groove 132. At this time, the telescopic portion 20 moves along the first direction relative to the sleeve 10 and switches to the extended state. The first end 22 of the telescopic portion 20 is connected to the lens assembly 202 so that the lens assembly 202 is maintained at the current position.

[0076] When the lens assembly 202 needs to leave the current position, the coil 32 is energized again and generates a force with the magnetic member 31, pushing the shaft 40 to move in the first direction again and push the telescopic part 20. At this time, the second engaging portion 41 located in the third engaging slot 136 contacts the first engaging portion 21. The first engaging portion 21 is disengaged from the second engaging slot 132 under the push of the second engaging portion 41. The first engaging portion 21 slides into the first engaging slot 131 under the guidance of the third guide surface 210 and the second guide surface 134 and rotates so that the first engaging portion 21 corresponds to the first engaging slot 131. The telescopic part 20 moves in the second direction under the action of the reset member 34 so that the first engaging portion 21 slides into the first engaging slot 131 and is locked in the first engaging slot 131. At this time, the telescopic part 20 moves relative to the sleeve 10 in the second direction and switches to the recovery state. The first end 22 located in the telescopic part 20 is separated from the lens assembly 202, so that the lens assembly 202 leaves the current position.

[0077] In the process of switching the telescopic part 20 from the second card slot 132 to the first card slot 131, the telescopic part 20 needs to move a certain distance along the first direction first, so that the first engaging part 21 can be disengaged from the second card slot 132. The distance moved along the first direction is the floating distance required for the extension state switching process of the telescopic part 20. When the telescopic part 20 is connected to the lens assembly 202, a certain avoidance space can be set between the two. The avoidance space can avoid the floating distance required by the telescopic part 20 when the state is switched, so as to realize the free switching between the extension state and the retracted state of the telescopic part 20. Exemplarily, a locking groove can be set for the lens assembly 202 for connection with the telescopic part 20, and the telescopic part 20 can be extended into the locking groove. A certain avoidance space is reserved in the locking to accommodate the telescopic part 20 with a floating distance.

[0078] In some embodiments, the telescopic portion 20 includes a shaft rod 24 and a locking portion 25 connected in sequence. The shaft rod 24 is movably inserted into the sleeve 10, and one end of the shaft rod 24 is connected to the power mechanism 30. The locking portion 25 is arranged at the other end of the shaft rod 24. The locking portion 25 protrudes from the outer periphery of the shaft rod 24 and is located outside the sleeve 10. The locking portion 24 is used to connect or separate with the lens assembly 202.

[0079] By providing the locking portion 25 and making the outer periphery of the locking portion 25 protrude from the outer periphery of the shaft 24, on the one hand, the contact area between the telescopic portion 20 and the lens assembly 202 can be increased, and the stability of the locking device 100 in locking the position of the lens assembly 202 can be improved.

[0080] In some embodiments, the reset member 34 is sleeved on the outer circumference of the shaft 24 and connected between the locking portion 25 and the sleeve 10 . The reset member 34 is used to provide a restoring force along the second direction for the telescopic portion 20 .

[0081] By forming a step between the locking portion 25 and the shaft 24, on the one hand, a certain space can be provided for the reset member 34 to be arranged on the telescopic portion 20, so as to prevent the reset member 34 from being separated from the telescopic portion 20, thereby improving the stability of the connection between the reset member 34 and the telescopic portion 20. On the other hand, the shaft 24 can provide a guide for the reset member 34 to stretch or contract, thereby improving the stability of the reset member 34 during the movement process.

[0082] In some embodiments, an annular step 15 is provided at one end of the sleeve 10 facing the locking portion 25 , the annular step 15 protrudes from the outer circumference of the sleeve 10 , and an accommodating groove 150 is provided at the annular step 15 corresponding to the locking portion 25 to accommodate at least a portion of the reset member 34 .

[0083] It is understandable that the cross-sectional shape of the receiving groove 150 can be set to a form in which the width of the groove bottom is greater than the width of the groove opening, such as a trapezoidal shape, an arc shape, etc., so as to accommodate the reset member 34. For example, if the reset member 34 is a spring, the spring can be engaged in the receiving groove 150 to avoid separation from the sleeve 10 during the extension and contraction of the spring. In this way, by providing the receiving groove 150, a part of the reset member 34 can be engaged in the receiving groove 150, thereby improving the stability and reliability of the reset member 34.

[0084] Correspondingly, the surface of the locking portion 25 facing the sleeve 10 may also be provided with a groove (not shown) similar to the accommodating groove 150 to accommodate the other end of the spring. The groove can not only be used to engage the spring to prevent the spring from coming off the telescopic portion 20 during the stretching or contraction process, but also provide a certain space for the telescopic portion 20 to rotate relative to the spring along the axial direction of the sleeve to achieve the movement effect of the telescopic portion 20.

[0085] Secondly, please combine Figure 1 and Figure 8 The present invention also provides a camera module 200, including a housing 201, a lens assembly 202 and a locking device 100 as described in the first aspect above, wherein the lens assembly 202 and the locking device 100 are arranged in the housing 201, and the locking device 100 is arranged corresponding to the lens assembly 202.

[0086] In some embodiments, the lens assembly 202 is provided with a second connecting block 2021, which protrudes from the lens assembly 202 and corresponds to the telescopic part 20, and the second connecting block 2021 is provided with a locking groove 2021a, which is used to accommodate the telescopic part 20 when the telescopic part 20 is extended.

[0087] By providing a second connection block 2021 protruding from the lens assembly 202, it is possible to facilitate the correspondence between the telescopic part 20 and the lens assembly 202 while avoiding collision or interference between the lens assembly 202 and the locking device 100, thereby shortening the distance that the telescopic part 20 needs to extend when locking the lens assembly 202, making the overall structure of the locking device 100 more compact. By using the locking groove 2021a, when the telescopic part 20 extends to connect with the lens assembly 202, the telescopic part 20 can be engaged in the locking groove 2021a, thereby improving the stability of the engagement between the telescopic part 20 and the lens assembly 202.

[0088] Third, see Fig. 9 The present invention further provides a mobile terminal 300 , comprising a terminal body 301 and the camera module 200 of the second aspect, wherein the camera module 200 is disposed in the terminal body 301 .

[0089] The locking device, camera module and mobile terminal disclosed in the embodiments of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the locking device, camera module and mobile terminal of the present invention and their core ideas; at the same time, for general technical personnel in this field, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A locking device, characterized in that: The locking device is applied to a camera module, the camera module comprises a housing, a driving mechanism and a lens assembly arranged in the housing, the driving mechanism is connected to the lens assembly, the driving mechanism is used to drive the lens assembly to move, and the locking device comprises: A sleeve, the sleeve is used to be connected to the housing, and the axial direction of the sleeve includes a first direction and a second direction opposite to the first direction; a telescopic portion, the telescopic portion being movably arranged on the sleeve, and when the lens assembly moves to a position corresponding to the telescopic portion, the telescopic portion moves relative to the sleeve along the first direction to be connected with the lens assembly, and when the telescopic portion moves relative to the sleeve along the second direction to be separated from the lens assembly, the lens assembly can move to be staggered with the telescopic portion; a power mechanism connected to the telescopic portion and used to push the telescopic portion so that the telescopic portion moves relative to the sleeve along the first direction or the second direction; A driving shaft, wherein the driving shaft is at least partially located in the sleeve and connected to the telescopic part, the power mechanism is connected to the telescopic part through the driving shaft, and the driving shaft can move along the axial direction of the sleeve under the driving action of the power mechanism, so that the telescopic part moves along the axial direction of the sleeve and rotates around the axis of the sleeve, so that the telescopic part is connected to or separated from the lens assembly.

2. The locking device according to claim 1, characterized in that: The inner wall of the sleeve is provided with a plurality of protrusions, and the plurality of protrusions are distributed at intervals along the circumference of the sleeve. An accommodating space is formed between a side of the plurality of protrusions facing away from the power mechanism and the inner wall of the sleeve, and the accommodating space is used to accommodate the telescopic part. A first clamping groove is formed between two adjacent protrusions, and the first clamping groove is connected to the accommodating space. A second clamping groove is provided on a side of the protrusion facing away from the power mechanism. Along the axial direction of the sleeve, the depth of the first clamping groove is greater than the depth of the second clamping groove. The first clamping groove and the second clamping groove are distributed along the circumference of the sleeve. A first clamping part is provided on the outer periphery of the telescopic part, and the first clamping part can be movably clamped in the first clamping groove or the second clamping groove; The power mechanism pushes the telescopic part to move along the first direction and causes the telescopic part to rotate, so that when the telescopic part is connected to the lens assembly, the first engaging part rotates to engage with the second engaging slot, or, when the power mechanism pushes the telescopic part to move along the second direction and causes the telescopic part to rotate to a contracted state, the first engaging part rotates to engage with the first engaging slot.

3. The locking device according to claim 2, characterized in that: There are multiple first card slots and multiple second card slots, and the number of the second card slots is the same as the number of the first card slots. Along the circumference of the sleeve, multiple first card slots are distributed at intervals, and multiple second card slots are distributed at intervals, and multiple first card slots and multiple second card slots are alternately arranged.

4. The locking device according to claim 3, characterized in that: There are multiple first engaging parts, and the number of the first engaging parts is the same as the number of the first card slots. The multiple first card slots are evenly spaced, and the multiple second card slots are evenly spaced, so that when the telescopic part rotates at any rotation angle relative to the sleeve, the multiple first engaging parts are respectively engaged with the multiple first card slots, or are respectively engaged with the multiple second card slots.

5. The locking device according to claim 3, characterized in that: A side of the protrusion facing away from the power mechanism includes a first guide surface located in the second slot and a second guide surface located outside the second slot, and the first guide surface and the second guide surface are inclined along the second direction to guide the first engaging portion to rotate; The first engaging portion is provided with a third guide surface corresponding to the first guide surface. When the pushing shaft pushes the first engaging portion to disengage from any of the first slots, the third guide surface is connected to the first guide surface, and is rotated and engaged with the second slot under the guidance of the first guide surface, so that the telescopic portion moves along the first direction until it is connected to the lens assembly; when the pushing shaft pushes the first engaging portion to disengage from the second slot, the third guide surface is connected to the second guide surface, and is rotated and engaged with another first slot under the guidance of the second guide surface, so that the telescopic portion moves along the second direction until it is separated from the lens assembly.

6. The locking device according to claim 3, characterized in that: A plurality of second engaging parts are provided at one end of the driving shaft connected to the telescopic part, the second engaging parts protrude from the outer peripheral surface of the driving shaft, and the second engaging parts are used to be connected with the first engaging parts; The protrusion is further provided with a plurality of third card slots, the number of the third card slots is the same as the number of the first card slots, the third card slots are provided between two adjacent first card slots and are parallel to the first card slots, and the third card slots are connected to the second card slots; The number of the second engaging parts is the sum of the number of the first engaging slots and the third engaging slots, and the plurality of second engaging parts are respectively slidably engaged with the first engaging slots and the third engaging slots.

7. The locking device according to claim 6, characterized in that: The second engaging portion has a connecting surface corresponding to the first engaging portion, and the connecting surface includes two inclined surfaces connected in sequence at an angle, and the connecting position of the two inclined surfaces forms a convex ridge, and the convex ridge is used to connect with the first engaging portion.

8. The locking device according to claim 1, characterized in that: A first connecting block is provided at one end of the driving shaft located outside the sleeve. The first connecting block is hollow and forms an installation cavity. The power mechanism includes a magnetic part and a coil. The installation cavity is used to accommodate the magnetic part. The coil is arranged on the shell corresponding to the magnetic part, and the coil is spaced apart from the first connecting block.

9. The locking device according to any one of claims 1 to 8, characterized in that: The power mechanism also includes a power component and a reset component. The telescopic part has a first end for connecting to the lens assembly and a second end opposite to the first end. The power component is connected to the second end and is used to provide a driving force for the telescopic part along the first direction. The first end is located outside the sleeve. The reset component is connected to the first end and the sleeve. The reset component is used to provide a restoring force for the telescopic part along the second direction so that the telescopic part is separated from the lens assembly.

10. The locking device according to any one of claims 1 to 8, characterized in that: The telescopic part includes a shaft rod and a locking part connected in sequence, the shaft rod is movably inserted into the sleeve, and one end of the shaft rod is connected to the power mechanism, and the locking part is arranged at the other end of the shaft rod, the locking part protrudes from the outer periphery of the shaft rod and is located outside the sleeve, and the locking part is used to connect with or separate from the lens assembly.

11. The locking device according to claim 10, characterized in that: The power mechanism includes a power component and a reset component. The power component is connected to one end of the shaft and is used to provide a driving force for the telescopic part along the first direction. The reset component is sleeved on the outer circumference of the shaft and connected between the locking part and the sleeve. The reset component is used to provide a restoring force for the telescopic part along the second direction so as to separate the telescopic part from the lens assembly.

12. The locking device according to claim 11, characterized in that: An annular step is provided at one end of the sleeve facing the locking portion, the annular step protrudes from the outer circumference of the sleeve, and the annular step is provided with an accommodating groove corresponding to the locking portion to accommodate at least a portion of the reset member.

13. A camera module, characterized in that: It comprises a shell, a lens assembly and a locking device as described in any one of claims 1 to 12, wherein the lens assembly and the locking device are arranged in the shell, and the locking device is arranged corresponding to the lens assembly.

14. The camera module according to claim 13, characterized in that: The lens assembly is provided with a second connecting block, the second connecting block protrudes from the lens assembly to correspond to the telescopic part, and the second connecting block is provided with a locking groove, and the locking groove is used to accommodate the telescopic part when the telescopic part is extended.

15. A mobile terminal, characterized in that: It comprises a terminal body and a camera module as described in claim 13, wherein the camera module is arranged on the terminal body.

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