CN218383428U - Driving mechanism of optical device, optical module and mobile terminal - Google Patents

Abstract

The present disclosure relates to a drive mechanism, optical module and mobile terminal of optical device, drive mechanism includes: a fixing member; the moving part is movably arranged on the fixed part; the shape memory alloy component is connected between the fixed part and the moving part and can enable the moving part to generate a tendency of moving towards a first direction after being electrified; a guide structure disposed between the fixed member and the moving member for guiding the moving member in the first direction; and an elastic member connected between the moving member and the fixed member to be inclined with respect to the first direction and capable of generating a first elastic component force toward a second direction opposite to the first direction and a second elastic component force toward a side of the guide structure. The inclined elastic piece can play the roles of returning and enabling the moving piece to be stably supported on the guide structure, and the two roles are integrated in the same component, so that the number of parts is saved, and the cost is reduced.

Description

Driving mechanism of optical device, optical module and mobile terminal

Technical Field

The present disclosure relates to the field of optical technologies, and in particular, to a driving mechanism for an optical device, an optical module, and a mobile terminal.

Background

In the related art, in order to make the imaging effect of the image pickup apparatus clearer, a driving mechanism is generally provided to drive the optical device to move, so that the sensor captures a high-quality image. As the function of the optical module is developed more and more rapidly, the control structure inside the driving mechanism becomes more and more complex, resulting in an increase in manufacturing cost and control cost, and therefore, it is an extremely important problem to simplify the control process of the driving mechanism.

SUMMERY OF THE UTILITY MODEL

An object of the present disclosure is to provide a driving mechanism of an optical device, an optical module, and a mobile terminal to at least partially solve the problems in the related art.

In order to achieve the above object, the present disclosure provides a driving mechanism of an optical device, comprising: a fixing member; the moving part is movably arranged on the fixed part; the shape memory alloy component is connected between the fixed part and the moving part and can enable the moving part to generate a tendency of moving towards a first direction after being electrified; a guide structure provided between the fixed member and the moving member for guiding the moving member in the first direction; and an elastic member connected between the moving member and the fixed member to be inclined with respect to the first direction and capable of generating a first elastic component force toward a second direction opposite to the first direction and a second elastic component force toward a side of the guide structure.

Optionally, the elastic member is configured to: when the shape memory alloy component is powered off, the moving part can be elastically pressed on the fixing part towards the second direction.

Optionally, the elastic member and the guiding structure are disposed on the same side of the driving mechanism, the elastic member is obliquely connected between a first side of the fixed member and a second side of the moving member, and the first side and the second side are disposed opposite and spaced apart.

Optionally, be formed with two first installation departments on the first side, the middle zone of second side is formed with the second installation department, two first installation department is about the second installation department is symmetrical, the elastic component shape connect in symmetrically the second installation department and two first installation department.

Optionally, the elastic element is configured in the form of a thread or in the form of a spring.

Optionally, the elastic member is configured as a single piece or as a double piece integrally molded in a ring shape.

Optionally, the guiding structure comprises a first guiding structure and a second guiding structure arranged at two ends of the moving part on the same side,

the first guide structure comprises a sliding shaft extending along the moving direction of the moving part or a ball row arranged along the moving direction, when the first guide structure comprises the ball row, the first guide structure can be arranged between the fixed part and the moving part in a rolling way, or the first guide structure is fixed on the fixed part or the moving part,

the second guide structure includes one of balls, a slide shaft extending in the moving direction, and a ball row arranged in the moving direction, and when the second guide structure includes the balls or the ball row, the second guide structure is rollably disposed between the fixed member and the moving member, or the second guide structure is fixed to the fixed member or the moving member.

Optionally, the first guide structure is supported by a first V-shaped support structure provided on the moving member and a second V-shaped support structure provided on the fixed member,

the second guide structure is supported by a square support structure which is arranged on the fixed part and can accommodate the second guide structure and a plane of the moving part; or alternatively

When the second guide structure includes a slide shaft extending in the moving direction or a ball row arranged in the moving direction, the second guide structure is supported by a third V-shaped support structure provided on the fixed member and the plane of the moving member.

Optionally, the first V-shaped support structure, the second V-shaped support structure and the third V-shaped support structure are respectively configured as V-shaped grooves, or,

the first V-shaped support structure, the second V-shaped support structure and the third V-shaped support structure respectively comprise two rows of shaft rods which are arranged side by side.

Optionally, the shape memory alloy subassembly includes shape memory alloy silk thread, shape memory alloy silk thread is connected respectively on the third installation department of mounting with on the fourth installation department of moving part, and in the first direction, the third installation department with the fourth installation department is arranged from top to bottom.

Optionally, one of the third mounting portion and the fourth mounting portion is one, the other is two and is symmetrically arranged about the mounting portion of which the number is one, and the shape memory alloy wires are symmetrically connected to the third mounting portion and the fourth mounting portion.

Optionally, the shape memory alloy subassembly includes two shape memory alloy silk threads, the third installation department with the quantity of fourth installation department is two respectively, every the one end of shape memory alloy silk thread is connected in one the third installation department, the other end connect in one the fourth installation department, and two shape memory alloy silk threads are at the orientation isometric and parallel in the orthographic projection on the first direction.

Optionally, the shape memory alloy subassembly includes a shape memory alloy wire of hook one-tenth X type, the third installation department with the quantity of fourth installation department is two respectively, shape memory alloy wire connects gradually in one the third installation department, one oblique right the fourth installation department, another fourth installation department and another the third installation department, just shape memory alloy wire is two fourth installation department is short circuited.

Optionally, the shape memory alloy component further comprises a conductive piece connected with the shape memory alloy wire, and the conductive piece is embedded in the fixing piece and is used for being electrically connected with a power supply unit.

Optionally, the driving mechanism comprises a position sensor for identifying the relative position of the moving member and the fixed member, and the position sensor is electrically connected with a power supply element.

Optionally, the position sensor comprises one of a magnetic field sensor, an electric field sensor and an optoelectronic position sensor.

According to a second aspect of the present disclosure, there is provided an optical module comprising an optical device and a drive mechanism provided by the present disclosure.

According to a third aspect of the present disclosure, a mobile terminal is provided, which includes the optical module provided by the present disclosure.

Through the technical scheme, the shape memory alloy assembly in the driving mechanism can enable the moving part to generate a trend of moving towards the first direction, the elastic part can generate component forces in two directions, one component force direction is opposite to the first direction so as to drive the moving part to return, and the component force in the other direction can enable the moving part to abut against a guide structure between the fixing part and the moving part, so that the stability of the moving process of the moving part and the accuracy of the moving direction are ensured. In the embodiment of the disclosure, the inclined elastic piece is arranged, so that the action of returning the moving piece and stably supporting the moving piece on the guide structure can be simultaneously realized, the two actions are integrated on the same component, the part number of the driving mechanism is saved, and the part control cost is reduced.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic structural view of a drive mechanism provided in an exemplary embodiment of the present disclosure;

FIG. 2 is a partial top view of a drive mechanism provided in an exemplary embodiment of the present disclosure;

FIG. 3 isbase:Sub>A cross-sectional view taken along A-A in FIG. 2 of an exemplary embodiment of the present disclosure providingbase:Sub>A drive mechanism;

FIG. 4 is a schematic view of a portion of a drive mechanism provided in an exemplary embodiment of the present disclosure;

FIG. 5 is a schematic view of a portion of a drive mechanism provided in an exemplary embodiment of the present disclosure;

FIG. 6 is a schematic view of a portion of a drive mechanism provided in an exemplary embodiment of the present disclosure;

FIG. 7 is a schematic view of a portion of a drive mechanism provided in an exemplary embodiment of the present disclosure;

FIG. 8 is a partial top view of a drive mechanism provided in an exemplary embodiment of the present disclosure;

FIG. 9 is a schematic view of a portion of a drive mechanism provided in an exemplary embodiment of the present disclosure;

FIG. 10 is a schematic view of a portion of a drive mechanism provided in an exemplary embodiment of the present disclosure;

FIG. 11 is a schematic view of a portion of a drive mechanism provided in an exemplary embodiment of the present disclosure;

FIG. 12 is a schematic view of a guide structure provided in an exemplary embodiment of the present disclosure;

FIG. 13 is a schematic view of a guide structure provided in an exemplary embodiment of the present disclosure;

FIG. 14 is a schematic view of a guide structure provided in an exemplary embodiment of the present disclosure;

FIG. 15 is a schematic view of a guide structure provided in an exemplary embodiment of the present disclosure;

FIG. 16 is a schematic view of a guide structure provided in an exemplary embodiment of the present disclosure;

FIG. 17 is a schematic view of a guide structure provided in an exemplary embodiment of the present disclosure;

FIG. 18 is a schematic view of an optical module provided in an exemplary embodiment of the present disclosure;

fig. 19 is a schematic diagram of a mobile terminal provided in an exemplary embodiment of the present disclosure.

Description of the reference numerals

1-driving mechanism, 2-optical device, 3-optical module, 4-mobile terminal, 10-fixing part, 101-housing, 11-first side, 111-first mounting part, 112-third mounting part, 20-moving part, 21-second side, 12-second V-shaped supporting structure, 14-third V-shaped supporting structure, 211-second mounting part, 212-fourth mounting part, 22-first V-shaped supporting structure, 30-shape memory alloy component, 31-shape memory alloy wire, 32-conductive part, 33-first pin, 40-guide structure, 41-first guide structure, 42-second guide structure, 50-elastic part, 61-magnet, 62-position sensor, 63-second pin.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, where a contrary explanation is not provided, directional terms such as "upper, lower, top, and bottom" are used for convenience of description and may be specifically defined in conjunction with the drawing direction of fig. 3, and in fig. 1, the first direction is upper and top, the second direction is lower and bottom, "inner and outer" refer to inner and outer of the self-profile of the corresponding component, and terms such as "first, second" and the like used in the present disclosure are used for distinguishing one element from another element without order and importance. Moreover, when the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.

Referring to fig. 1 in conjunction with fig. 2 and 3, the disclosed embodiments provide a driving mechanism of an optical device for driving the optical device to have a clear imaging effect. Wherein the optical device may include a lens portion and a sensor portion, the driving mechanism includes a fixed member 10, a moving member 20 movably disposed at the fixed member 10, a shape memory alloy assembly 30 coupled between the fixed member 10 and the moving member 20, a guide structure 40 disposed between the fixed member 10 and the moving member 20, and an elastic member 50. One of the fixed member 10 and the movable member 20 may be used to mount a sensor portion and the other may be used to mount a lens portion, and for example, the fixed member 10 may be used to mount a sensor portion and the movable member 20 may be used to mount a lens portion. The guide structure 40 is used for supporting and guiding the moving member 20 to move along the first direction, so that the moving direction is accurate and the moving process is stable. The shape memory alloy assembly 30 is capable of inducing a tendency of the moving member 20 to move in a first direction when it is energized, i.e., the shape memory alloy assembly 30 will contract when heated after being energized, thereby pulling the moving member 20 to move in the first direction. Here, it is understood that in the embodiment of the present disclosure, the tendency of the moving member 20 to move to the first direction may be realized by the force generated by the memory alloy assembly 30 at least to the first direction, for example, the driving force generated by the shape memory alloy assembly 30 may be directed to a single first direction, and the driving force may also be directed to an oblique force having a component force of the first direction. The elastic member 50 is connected between the moving member 20 and the fixed member 10 obliquely with respect to the first direction, for example, referring to fig. 3, the elastic member 50 is disposed obliquely and can generate a first elastic force component toward the second direction opposite to the first direction and a second elastic force component toward the side of the guide structure 40, that is, the elastic member 50 can generate a force downward and leftward in the drawing of fig. 3 with respect to the moving member 20. Thus, the leftward force in fig. 3 (i.e., the upward force in fig. 2) generated by the elastic element 50 can press the moving element 20 against the guiding structure 40, so that the moving element 20 can move against the guiding structure 40, the stability of the moving process is improved, and the generation of shaking noise when the driving mechanism does not work is prevented; the downward force generated by the elastic element 50 in fig. 3 is opposite to the upward force of the shape memory alloy element 30, when the driving mechanism works, the elastic force drives the moving element 20 to move upward after the shape memory alloy element 30 is powered on, after the driving mechanism finishes the action, the shape memory alloy element 30 is powered off, and the downward elastic force of the elastic element 50 drives the moving element 20 to return to the initial position for the next driving action. Here, the driving force of the shape memory alloy element 30 in the first direction to the moving element 20 can be adjusted by adjusting the magnitude of the current passing through the shape memory alloy element, and the moving stroke and the moving direction of the moving element 20 can be controlled according to the difference between the driving force of the shape memory alloy element 30 and the elastic component force of the elastic element 50 in the second direction. In other embodiments, the driving mechanism further comprises a housing 101 covering the periphery of the fixed member 10 for protecting the moving member 20 and limiting the movement in the first direction.

Through the technical scheme, the shape memory alloy assembly 30 in the driving mechanism can make the moving part 20 generate a tendency of moving towards the first direction, the elastic part 50 can generate component forces in two directions, one component force direction is opposite to the first direction so as to drive the moving part 20 to return, and the other component force direction can make the moving part 20 abut against the guide structure 40 between the fixed part 10 and the moving part 20, so that the stability of the moving process and the accuracy of the moving direction of the moving part 20 are ensured. In the embodiment of the present disclosure, by providing the inclined elastic member 50, the functions of returning the moving member 20 and stably supporting the moving member 20 on the guide structure 40 can be simultaneously performed, and the two functions are integrated into the same component, so that the number of parts of the driving mechanism is reduced, and the part control cost is reduced.

In one embodiment, the elastic member 50 may be configured as: when the shape memory alloy assembly 30 is powered off, the moving element 20 can be elastically pressed against the fixed element 10 in the second direction. That is, in the non-operating state, the component force of the elastic element 50 in the second direction can press the bottom of the moving element 20 against the opposite surface of the fixed element 10, so that the moving element 20 abuts against the fixed element 10 at the bottom side, and the moving element 20 is prevented from shaking to generate impact abnormal sound. For example, the elastic member 50 may be configured such that the force in the second direction is greater than the gravity of the moving part, whereby the action of the gravity of the moving part can be overcome. In an embodiment, the elastic component force in the second direction may be configured to be not less than 1.5 times of the gravity of the moving part, so that when the optical module is impacted or shaken in any direction, it can be ensured that the elastic component force in the second direction enables the moving part 20 to always abut against the fixing part 10 in the second direction, thereby effectively avoiding the impact abnormal sound which may occur under various conditions, avoiding the damage of parts, and improving the service life of parts. Wherein, the moving part may include the moving member 20 and all devices that can be mounted on the moving member 20 and move together with the moving member 20.

Referring to fig. 1 and 2, the elastic member 50 and the guide structure 40 may be disposed at the same side of the driving mechanism, and the elastic member 50 is inclinedly connected between the first side 11 of the fixed member 10 and the second side 21 of the moving member 20, wherein the first side 11 is disposed opposite to and spaced apart from the second side 21. The elastic member 50 may be provided with a space for the oblique installation by the interval between the first side 11 and the second side 21. In other embodiments, the elastic element 50 may be disposed adjacent to the guiding structure 40, for example, on the left side of fig. 2, and the inclined direction of the elastic element 50 may be the same as the direction shown in fig. 2, so that the component force direction of the elastic element 50 is not changed, and the elastic element 50 may also serve to pull the moving element 20 towards the fixing element 10 and towards the guiding structure 40.

Referring to fig. 1 to 7, two first mounting portions 111 may be formed on the first side 11, a second mounting portion 211 may be formed in a middle area of the second side 21, and the two first mounting portions 111 may be symmetrically disposed with respect to the second mounting portion 211, that is, a three-point connection line of the two first mounting portions 111 and the second mounting portion 211 forms an isosceles triangle, and the elastic element 50 may be connected to the second mounting portion 211 and the two first mounting portions 111 in a shape symmetry manner, so as to ensure that an acting force of the elastic element 50 on the moving element 20 is balanced and does not swing. Wherein two first mounting portions 111 may be provided at both end portions of the fixing member 10, and the second mounting portion 211 is provided higher than the first mounting portions 111 to incline the elastic member 50.

In the embodiment of the present disclosure, the elastic element 50 may be made of silicon gel, metal or metal alloy with certain hardness, for example, a steel wire or a nitinol memory wire, or the elastic element 50 may also be a spring.

In one embodiment, referring to fig. 4 and 5, the elastic member 50 may be configured in a wire shape, for example, in fig. 4, the elastic member 50 is configured in a single wire, both ends of the wire may be connected to the first mounting part 111 configured in a column shape, for example, may be connected by winding, the middle of the wire may be hung on the second mounting part 211, the second mounting part 211 may be configured in a groove opening upward in cooperation with the sidewall of the moving member 20, and the middle of the wire may be hung on the groove wall. In another embodiment, referring to fig. 5, the elastic member 50 may be configured as a double thread integrally formed in a ring shape, i.e., a ring of threads is overlapped into two and installed in a manner similar to the above-described single thread, such a double ring thread having better elasticity than a single thread and being integrally formed to facilitate installation of the elastic thread. In the disclosed embodiment, the use of an integral resilient member 50 can achieve a uniform effect on the moving member 20, ensuring that the moving member 20 does not deflect. Also, this mounting arrangement may allow the elastic member 50 to have a longer length, which may provide a greater elastic force. In other embodiments, a plurality of linear elastic members 50 may be obliquely connected between the fixed member 10 and the moving member 20, for example, two, three, four or more elastic members are equally spaced, in which case, both ends of each elastic member 50 are connected to one first mounting portion and one second mounting portion, respectively.

In one embodiment, referring to fig. 6, the elastic member 50 may also be configured in a spring shape to provide a better elastic force. Similarly, the spring-like elastic member 50 may be a single member or a double member integrally formed in a ring shape as described above, and the description thereof will not be repeated.

In one embodiment, referring to fig. 1, the guide structure 40 may include a first guide structure 41 and a second guide structure 42 disposed at both ends of the moving member 20 on the same side. Wherein, with reference to fig. 1, 12 to 17, the first guide structure 41 may include a slide shaft extending in the moving direction of the moving member 20 (i.e., the up-down direction of the AF motor) or a ball train arranged in the moving direction, and when the first guide structure 41 includes the ball train, it may be rollably disposed between the fixed member 10 and the moving member 20; or it may be fixed to one of the fixed member 10 and the moving member 20 and the other of the fixed member 10 and the moving member 20 may be slid on the ball train, i.e., slid with respect to the ball train, and referring to fig. 13, the ball train of two balls is fixed to the fixed member 10 and the moving member 20 is slid with respect to the ball train. The second guide structure 42 may include one of balls, a sliding shaft extending in the moving direction, and a ball row arranged in the moving direction, and when the second guide structure 42 includes a ball or a ball row, it may be rollably disposed between the fixed member 10 and the moving member 20, or it may be fixed to one of the fixed member 10 and the moving member 20, and the other of the fixed member 10 and the moving member 20 may be slid to the ball or the ball row, i.e., slid relative to the ball or the ball row, and referring to fig. 16 and 17, one ball or a ball row of two balls is fixed to the fixed member 10, and the moving member 20 is slid relative to the ball or the ball row. The first guide structure 41 and the second guide structure 42 may be any combination of the above forms, which are not described herein. When the guide structure 40 comprises balls or ball rows, the following advantages are obtained: the balls are in point contact with the moving member 20 and the fixed member 10, and rolling friction force is generated when the moving member 20 moves, so that great resistance is not generated to the movement of the moving member 20, and the AF motor has great driving force to adapt to a module with a large lens portion.

In one embodiment, referring to fig. 1, the first guide structure 41 may be supported by the first V-shaped support structure 22 formed on the moving member 20 and the second V-shaped support structure 12 formed on the fixed member 10, i.e., the first guide structure 41 is held by the V-shaped support structures disposed at two opposite sides, in other embodiments, the sliding shaft of the first guide structure 41 may be fixed by the arc-shaped support structure matched therewith and held by the V-shaped structure (as shown in fig. 12), and the ball row may be fixed by the semicircular support structure matched with each ball and held by the V-shaped support structure (as shown in fig. 13). Referring to fig. 16, the second guide structure 42 may be supported by a square support structure formed on the fixed member 10 and capable of receiving the second guide structure 42 and a plane of the moving member 20, for example, when the second guide structure 42 is a ball row or a slide shaft, the square support structure may be a groove having a U-shaped cross-section configuration extending in the same direction, and when the second guide structure 42 is one or more balls, the square support structure may be a groove having only one side opened and capable of receiving the balls. When the second guide structure 42 includes a slide shaft extending along the moving direction or a ball row arranged along the moving direction, referring to fig. 1, the second guide structure 42 may be supported by the third V-shaped support structure 14 formed on the fixed member 10 and the plane of the moving member 20, and in this embodiment, the outer circumferential surface of the first guide structure 41 is tangent to the inclined surfaces of the two V-shaped support structures disposed at opposite sides, thereby ensuring that the extending direction of the row of guide structures 40 is unique and stable. The second guide structure 42 may have a side with an outer circumferential surface tangent to the V-shaped support structure and another side in contact with the flat surface only for support. In this way, one of the two guiding and supporting structures is used for guiding and the other is used for supporting, and the requirement of stable movement of the moving part 20 is met. In other embodiments, both sets of guide support structures may be held by opposing V-shaped support structures. In other embodiments, referring to fig. 14, the sliding shaft of the second guiding structure 42 may be fixed by a matching arc-shaped supporting structure and may be slidably supported by a protrusion protruding from the moving member 20; referring to fig. 15, the ball row of the second guide structure 42 may be supported by a groove-shaped structure with a flat groove bottom at the opposite side of the V-shaped support structure.

In one embodiment, the first V-shaped support structure 22, the second V-shaped support structure 12 and the third V-shaped support structure 14 may be respectively configured as V-shaped grooves, for example, the first V-shaped support structure 22 and the third V-shaped support structure 14 are respectively a V-shaped groove integrally formed on the fixed member 10, and the second V-shaped support structure 12 may be a V-shaped groove integrally formed on the movable member 20.

In another embodiment, referring to fig. 1, the first V-shaped support structure 22, the second V-shaped support structure 12 and the third V-shaped support structure 14 may each comprise two rows of axles arranged side by side, i.e. V-shaped grooves are formed by two rows of axles arranged side by side. Here, it should be noted that the V-shaped groove formed by the two shafts is similar to a V shape as long as the guide structure 40 is ensured to be tangent thereto. Wherein, can have the interval between two axostylus axostyles side by side to the interval is not more than guide structure 40's diameter, has both made guide structure 40 can fall into as far as between the interval of two axostylus axostyles and prevent deviating from the axostylus axostyle, avoids all falling between two axostylus axostyles and can't play the support guide effect again. Wherein the shaft rod can be fixed on the corresponding fixing member 10 or moving member 20 by means of adhesion or the like. The axostylus axostyle is supported by metal material, and metal material hardness is great to frictional force is less when contacting with the ball of metal, compares in the mode of the V type groove of an organic whole formation moreover, and the form of axostylus axostyle has also avoided the ball to produce the indentation to V type groove.

Referring to fig. 1, the shape memory alloy element 30 may include a shape memory alloy wire 31, i.e., the shape memory alloy wire 31 is heated after being energized to contract to move the moving member 20. The shape memory alloy wire 31 may be connected to the third mounting portion 112 of the fixing member 10 and the fourth mounting portion 212 of the moving member 20, respectively, and the third mounting portion 112 and the fourth mounting portion 212 are disposed up and down in the first direction in a facing manner (as shown in fig. 3).

In one embodiment, one of the third and fourth mounting parts 112 and 212 may be one in number, the other may be two in number and symmetrically disposed with respect to the one-in-number mounting part, referring to fig. 1, the third mounting part 112 may be two in number, the fourth mounting part 212 may be one in number, and the shape-memory alloy wire 31 may be symmetrically connected to the third and fourth mounting parts 112 and 212. For example, both ends of the shape-memory alloy wire 31 may be connected to the two third mounting parts 112, the middle portion is connected to the third mounting parts 112, and the shape-memory alloy wire 31 is configured in a V-shape with an opening facing the first direction. The third mounting portion 112 may be configured to protrude from the mounting stage of the fixing member 10, and the fourth mounting portion 212 may be configured to have a hook shape, for example, a U-shaped structure with an opening facing a side wall of the moving member 20, and a middle region of the shape memory alloy wire 31 is hooked on the groove wall. The fourth mounting portion 212 and the second mounting portion 211 may be integrally formed. In the embodiment shown in fig. 4 to 6, the shape memory alloy wire 31 is initially configured as a V-shape with an opening facing the first direction, and when the shape memory alloy wire 31 is energized, the shape memory alloy wire 31 is heated to contract, that is, the length of the wire between the two third mounting portions 112 is shortened, and since the two ends of the wire are fixed, the middle portion of the wire (i.e., the tip of the V-shape) gradually overcomes the elastic force of the elastic member 50 to move in the first direction, thereby driving the moving member 20 to move in the first direction. In the process that the moving element 20 moves towards the first direction, the included angle of the V-shaped structure is increased more and more until the included angle is 180 degrees, the maximum stroke that the moving element 20 can move towards the first direction is reached, and in practical application, the movable range of the moving element 20 can be adjusted by adjusting the included angle of the V-shape according to the contraction amount of the shape memory alloy wire 31. The movement of the moving member 20 in the second direction after the movement of the moving member 20 in the first direction may be performed by reducing the current flowing through the shape memory alloy wire 31 to move the moving member 20 in the second direction to a predetermined position under the action of the elastic member 50, or by de-energizing the shape memory alloy wire 31 to restore the moving member 20 to the original position under the action of the elastic member 50. The fourth mounting portion 212 may be disposed at the very middle of the two third mounting portions 112 so that the shape memory alloy wires 31 are configured in a symmetrical structure, thereby ensuring that the movement of the moving member 20 maintains a uniform and non-biased movement.

Alternatively, in another embodiment, both ends of the shape-memory alloy wire 31 may be connected to the moving member 20, the middle portion is connected to the fixed member 10, and the shape-memory alloy wire 31 configures a V-shape opening in a second direction (i.e., opposite to the V-shape opening in fig. 4). For example, both ends of the shape-memory alloy wire 31 may be connected to both bottom ends of the moving member 20, and a mounting portion protruding toward the first direction may be formed at a position of the fixing member 10 located in the middle of the both bottom ends, and the middle portion may be hooked on the mounting portion in the above-described manner. In this case, the shape memory alloy wire 31 is heated by electricity and then contracted, and since the middle portion is fixed to the fixing member 10, the two end portions of the wire drive the moving member 20 to move in the first direction, which is the same as the movement of the wire with the V-shaped opening facing in the first direction, and thus, the description thereof will not be repeated.

In an embodiment, referring to fig. 7, the shape memory alloy member 30 may include two shape memory alloy wires 31, the number of the third mounting portion 112 and the number of the fourth mounting portion 212 are two, one end of each shape memory alloy wire 31 is connected to one third mounting portion 112, the other end of each shape memory alloy wire 31 is connected to one fourth mounting portion 212, and the two shape memory alloy wires 31 are equal in length and parallel in a forward projection in the first direction (refer to fig. 8) to ensure that the two shape memory alloy wires 31 do not interfere with each other. The two shape memory alloy wires 31 are symmetrically arranged, so that the movement of the moving part 20 can be prevented from deflecting. In this way, by using two shape memory alloy wires 31, the total length of the shape memory alloy wire 31 can be made longer than the aforementioned one shape memory alloy wire 31, and the deformation of the two wires can be overlapped to increase the movement stroke of the moving member 20.

In one embodiment, referring to fig. 9 and 10, the shape memory alloy element 30 may include a shape memory alloy wire 31 hooked in an X-shape, i.e., a shape memory alloy wire 31 wound in the same shape as the two shape memory alloy wires 31. As shown in the drawings, the number of the third mounting parts 112 and the number of the fourth mounting parts 212 may be two, two of the third mounting parts 112 may be flush, two of the fourth mounting parts 212 may be flush, one of the third mounting parts 112 and one of the fourth mounting parts 212 are configured as diagonal corners, the shape memory alloy wire 31 is connected to one of the third mounting parts 112 (upper left corner of the wire in fig. 10), the fourth mounting part 212 (lower right corner of the wire in fig. 10) diagonally opposite to the third mounting part 112, the other of the fourth mounting parts 212 (lower left corner of the wire in fig. 10), and the other of the third mounting parts 112 (upper right corner of the wire in fig. 10) in this order, and the shape memory alloy wire 31 is short-circuited at the two of the fourth mounting parts 212, so that the same effect as the two shape memory alloy wires 31 can be achieved by using one shape memory alloy wire 31, and thus the same advantageous effects can be achieved, and the description thereof will not be repeated.

Referring to fig. 8, in an embodiment, the shape memory alloy assembly 30 may further include a conductive member 32 connected to the shape memory alloy wire 31, and the conductive member 32 may be embedded in the fixing member 10 (omitted in fig. 8) for electrical connection with a power supply unit, which may be, for example, an FPC connected to a motherboard. One end of the conductive member 32 may be provided with a conductive clip, the shape memory alloy wire 31 may be fixedly clamped in the clip, and the other end of the conductive member 32 may be electrically connected to the power supply unit through the first pin 33, so as to control the on/off of the shape memory alloy wire 31 through the control system. The conductive member 32 is fixedly mounted on the fixing member 10, so that the electrical connection between the conductive member 32 and other devices can be more stable, and the short circuit of the circuit can be avoided.

In the embodiment of the present disclosure, the driving mechanism may include a position sensor 62 for identifying a relative position of the moving member 20 and the stationary member 10, and the position sensor 62 may be electrically connected to the power supply element, for example, the power supply unit through the second pin 63. The position sensor 62 performs closed-loop control of the driving process of the driving mechanism by sensing the moving position of the moving member 20 with respect to the stationary member 10.

In one embodiment, referring to fig. 1 and 11, the position sensor 62 may be a magnetic field sensor (e.g., a hall sensor), an electric field sensor (e.g., a capacitance sensor), or an electro-optical position sensor, for example, when the position sensor 62 is a hall sensor, one of the fixed member 10 and the moving member 20 may be provided with a magnet 61, and the other of the fixed member 10 and the moving member 20 is provided with the position sensor 62. The position sensor 62 is disposed opposite to the magnet 61 and can be electrically connected to the power supply element. The position sensor 62 recognizes the moving position of the moving member 20 with respect to the stationary member 10 by sensing the magnetic flux of the magnet 61, thereby performing closed-loop control of the driving process of the driving mechanism. Here, the magnet 61 may be a hall magnet. In an embodiment of the present disclosure, the position sensor 62 may be disposed on the stationary member 10, and the magnet 61 may be disposed on the moving member 20, so that the electrical connection of the position sensor 62 is stable. In the embodiment of the present disclosure, the electrical devices may be all disposed on the fixed component 10, so as to ensure reliable connection of the electrical devices, and avoid the occurrence of a short circuit condition from affecting the usability of the driving mechanism.

According to a second aspect of the embodiment of the present disclosure, referring to fig. 18, there is also provided an optical module 3, including an optical device 2 and a driving mechanism 1, where the driving mechanism 1 is the above-mentioned driving mechanism. The optical module 3 has all the advantages of the above-mentioned driving mechanism, and will not be described in detail herein.

According to a third aspect of the embodiment of the present disclosure, referring to fig. 19, a mobile terminal 4 is provided, which includes the optical module 3 described above and has all the advantages of the optical module 3 described above, and details are not repeated here. The mobile terminal 4 may be a mobile phone, a computer, a tablet computer, a watch, a monitoring device, an AR device, or other devices with an imaging function.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (18)

1. A drive mechanism for an optical device, comprising:

a fixing member;

the moving piece is movably arranged on the fixed piece;

the shape memory alloy component is connected between the fixed part and the moving part and can enable the moving part to generate a tendency of moving towards a first direction after being electrified;

a guide structure disposed between the fixed member and the moving member for guiding the moving member in the first direction; and

and an elastic member connected between the moving member and the fixed member to be inclined with respect to the first direction and capable of generating a first elastic component force toward a second direction opposite to the first direction and a second elastic component force toward a side of the guide structure.

2. The drive mechanism as recited in claim 1, wherein the resilient member is configured to: when the shape memory alloy component is powered off, the moving part can be elastically pressed on the fixing part towards the second direction.

3. The drive mechanism as recited in claim 1, wherein said resilient member is disposed on the same side of said drive mechanism as said guide structure, said resilient member being angularly connected between a first side of said fixed member and a second side of said movable member, said first side being disposed opposite and spaced from said second side.

4. The drive mechanism as recited in claim 3, wherein two first mounting portions are formed on the first side, a second mounting portion is formed in a middle region of the second side, the two first mounting portions are symmetrical with respect to the second mounting portion, and the elastic member is shape-symmetrically connected to the second mounting portion and the two first mounting portions.

5. The drive mechanism as recited in claim 4, wherein the elastic member is configured in a wire-like shape or in a spring-like shape.

6. The drive mechanism as recited in claim 4, wherein the elastic member is configured as a single piece or as a double piece integrally molded in a ring shape.

7. The drive mechanism as recited in claim 1, wherein the guide structure comprises a first guide structure and a second guide structure disposed at both ends of the moving member on the same side,

the first guide structure comprises a sliding shaft extending along the moving direction of the moving part or a ball row arranged along the moving direction, when the first guide structure comprises the ball row, the first guide structure can be arranged between the fixed part and the moving part in a rolling way, or the first guide structure is fixed on the fixed part or the moving part,

the second guide structure includes one of balls, a slide shaft extending in the moving direction, and a ball row arranged in the moving direction, and when the second guide structure includes the balls or the ball row, the second guide structure is rollably disposed between the fixed member and the moving member, or the second guide structure is fixed to the fixed member or the moving member.

8. The drive mechanism as recited in claim 7, wherein the first guide structure is supported by a first V-shaped support structure provided on the moving member and a second V-shaped support structure provided on the fixed member,

the second guide structure is supported by a square support structure which is arranged on the fixed part and can accommodate the second guide structure and a plane of the moving part; or

When the second guide structure includes a slide shaft extending in the moving direction or a ball row arranged in the moving direction, the second guide structure is supported by a third V-shaped support structure provided on the fixed member and the plane of the moving member.

9. The drive mechanism as recited in claim 8, wherein the first V-shaped support structure, the second V-shaped support structure, and the third V-shaped support structure are each configured as a V-groove, or,

the first V-shaped support structure, the second V-shaped support structure and the third V-shaped support structure respectively comprise two rows of shaft rods which are arranged side by side.

10. The drive mechanism as claimed in claim 1, wherein the shape memory alloy member includes a shape memory alloy wire connected to a third mounting portion of the fixed member and a fourth mounting portion of the movable member, respectively, and the third mounting portion and the fourth mounting portion are arranged up and down in the first direction.

11. The drive mechanism as recited in claim 10, wherein one of the third and fourth mounting portions is one in number and the other is two in number and is symmetrically disposed about the one in number mounting portion, the shape memory alloy wires being symmetrically connected to the third and fourth mounting portions.

12. The drive mechanism of claim 10, wherein the shape memory alloy assembly includes two shape memory alloy wires, the third mounting portion and the fourth mounting portion are two in number, each of which has one end connected to one of the third mounting portion and the other end connected to one of the fourth mounting portion, and the two shape memory alloy wires are equal in length and parallel in the direction of the orthographic projection of the shape memory alloy wires in the first direction.

13. The driving mechanism as claimed in claim 10, wherein the shape memory alloy component includes a shape memory alloy wire hooked to form an X-shape, the number of the third mounting portion and the fourth mounting portion is two respectively, the shape memory alloy wire is sequentially connected to one of the third mounting portion, the diagonal one of the fourth mounting portion, the other of the fourth mounting portion and the other of the third mounting portion, and the shape memory alloy wire is short-circuited at the two of the fourth mounting portions.

14. The drive mechanism as recited in claim 10, wherein the shape memory alloy assembly further comprises a conductive member connected to the shape memory alloy wire, the conductive member being embedded in the fixing member for electrical connection to a power supply unit.

15. The drive mechanism as claimed in claim 1, wherein the drive mechanism includes a position sensor for identifying a relative position of the moving member and the fixed member, the position sensor being electrically connected to a power supply element.

16. The drive mechanism as recited in claim 15, wherein the position sensor comprises one of a magnetic field sensor, an electric field sensor, and an electro-optical position sensor.

17. An optical module comprising an optical device and a drive mechanism according to any one of claims 1 to 16.

18. A mobile terminal characterized in that it comprises an optical module according to claim 17.

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