Lens driving device

Abstract

The utility model belongs to optical component technology field, concretely relates to a lens drive device, including shell, base, first drive mechanism and carrier, shell covers and combines in the outside of base, and carrier is located in the inside of base, and the longitudinal motion of carrier relative to base is driven by first drive mechanism, the lens drive device still includes pressure tightly spare and second drive mechanism, pressure tightly spare sets up in the inside of base and is located carrier one side, and the horizontal direction movement of pressure tightly spare is driven by second drive mechanism and approaches or is far from carrier, and the positioning of carrier after zooming is realized to the side of pressure tightly spare abutment carrier. The utility model discloses through setting up pressure tightly spare and second drive mechanism, after realizing the zooming operation of longitudinal movement of carrier, the second drive mechanism is driven to the carrier direction movement to pressure tightly spare by pressure tightly spare, and pressure tightly spare is pressed tightly to the lateral wall of carrier, realizes the positioning effect after carrier movement, makes carrier keep in zooming stable state.

Description

Technical Field

[0001] This utility model belongs to the field of optical component technology, specifically relating to a lens driving device. Background Technology

[0002] With the development of technology, many electronic devices today (such as smartphones or digital cameras) have the function of taking pictures or recording videos. The use of these electronic devices is becoming more and more common, and they are developing towards convenient and thinner designs to provide users with more choices.

[0003] Some electronic devices with photographic or video recording capabilities are equipped with a lens drive mechanism to drive optical components such as lenses to move, thereby achieving autofocus functionality.

[0004] Existing lens driving mechanisms typically achieve autofocus by moving a carrier and a lens connected to it longitudinally relative to a base. After the carrier achieves focusing through longitudinal movement, it needs to remain in this state. However, in existing technologies, lateral rotation or slight longitudinal movement of the carrier can cause shaking, severely affecting the lens's autofocus function. Utility Model Content

[0005] The present invention addresses the aforementioned technical problems by providing a lens driving device.

[0006] A lens driving device includes a housing, a base, a first driving mechanism, and a carrier. The housing covers the outside of the base, and the carrier is located inside the base. The first driving mechanism drives the carrier to move longitudinally relative to the base.

[0007] The lens driving device further includes a clamping member and a second driving mechanism. The clamping member is disposed in the base and located on one side of the carrier. The second driving mechanism drives the clamping member to move horizontally closer to or away from the carrier. The clamping member abuts against one side of the carrier to achieve the positioning of the carrier after zooming.

[0008] Optionally, the first driving mechanism includes an AF coil disposed on the side of the carrier and an AF magnet disposed on the inner wall of the housing. The AF magnet is disposed opposite to the AF coil, and after the AF coil is energized, the carrier moves longitudinally relative to the base.

[0009] Optionally, the lens driving device further includes a plurality of upper springs, which are respectively connected between the top of the base and the top of the carrier. The upper springs are connected to the AF coil through the carrier-embedded circuit in the carrier, and the base-embedded circuit in the base is connected to the AF coil through the upper springs and the carrier-embedded circuit.

[0010] Optionally, the AF coil is respectively disposed on the two opposite outer sidewalls of the carrier, and the AF magnet is respectively disposed on the two opposite inner sidewalls of the outer shell, with each AF magnet being disposed opposite to a corresponding AF coil.

[0011] Optionally, the base has a clearance opening on its side wall to avoid the AF magnet and the AF coil, and the clearance opening is located on the side away from the clamping member.

[0012] Optionally, a first ball groove is provided on the outer side wall of the carrier, and a second ball groove is provided on the inner side wall of the base. The first ball groove and the second ball groove are arranged opposite each other to form a guide ball groove, and one or more balls are arranged longitudinally in the guide ball groove.

[0013] Optionally, two first ball grooves are provided on the outer wall of the carrier, and the two first ball grooves are located on the same side of the outer wall of the carrier. Two second ball grooves are provided on the inner wall of the base, and the two second ball grooves are located on the same side of the inner wall of the base, so that two guide ball grooves are formed on one side between the carrier and the base.

[0014] Optionally, the guide ball groove is located on the opposite side of the clamping member.

[0015] Optionally, one of the two guide ball grooves is provided with a single ball and the other is provided with multiple balls;

[0016] The multi-ball bearing includes a plurality of first balls and at least one second ball. The first balls respectively contact the first ball groove and the second ball groove. A second ball is disposed between two adjacent first balls. The outer diameter of the second ball is smaller than that of the first ball.

[0017] Optionally, an adsorption magnet is provided on the inner wall of the base between the two second ball grooves, and the adsorption magnet is disposed opposite to and adsorbs the metal sheet disposed on one side of the carrier.

[0018] Optionally, one of the two first ball grooves is a V-shaped ball groove and the other is a flat ball groove.

[0019] Optionally, the second driving mechanism is a piezoelectric mechanism, which includes a piezoelectric block and a friction rod. The piezoelectric block is mounted on the base, and the friction rod is connected to the piezoelectric block. The friction rod abuts against the clamping member. When the piezoelectric block is energized and de-energized, causing deformation, the friction rod drives the clamping member to move horizontally.

[0020] Optionally, the top of the clamping member is provided with a friction rod guide groove, and the friction rod extends into the friction rod guide groove;

[0021] The piezoelectric mechanism also includes a spring sheet, the two ends of which are fixed to the clamping members on both sides of the friction rod guide groove. The friction rod is located between the spring sheet and the friction rod guide groove. The spring sheet presses the friction rod against the inner wall of the friction rod guide groove. When the piezoelectric block is energized and de-energized and deforms, the friction rod drives the spring sheet and the clamping members to move horizontally.

[0022] Optionally, the piezoelectric mechanism further includes a counterweight plate, the piezoelectric block is mounted on the counterweight plate, and both the counterweight plate and the piezoelectric block are mounted in the piezoelectric mechanism mounting port on one side of the base.

[0023] Beneficial effects: This utility model has at least one or more of the following advantages:

[0024] 1. This utility model, by setting up a clamping component and a second driving mechanism, allows the clamping component to move towards the carrier after the carrier has undergone a zoom operation involving longitudinal movement. The clamping component presses against the side wall of the carrier, achieving a positioning effect and keeping the carrier in a stable zoom state. In this state, the first driving mechanism can be de-energized, and the carrier's position will not change after power is cut off, achieving the effect of not requiring current supply when the carrier remains stationary. When the carrier needs to move again, the second driving mechanism moves the clamping component away from the carrier, removing the pressure, and then the second driving mechanism can drive the carrier to move longitudinally.

[0025] 2. The first drive mechanism of this utility model adopts magnetic drive technology and supplies power to the AF coil through an upper spring. The upper spring serves both to connect the energized components and to reset the device after the carrier moves.

[0026] 3. This utility model uses ball bearings to achieve a guiding effect during the longitudinal movement of the carrier.

[0027] This invention employs a method where a second ball is placed between two adjacent first balls within a guide ball groove. The three balls, under rotation, produce a complementary effect, improving the rolling guidance effect of the balls. Ultimately, this results in less friction and smoother movement of the carrier during longitudinal motion, preventing vibration.

[0028] This invention features an adsorption magnet between two ball grooves. The adsorption magnet and a metal sheet on one side of the carrier generate an adsorption force, causing the carrier to press firmly against the balls, preventing the balls from coming out of the grooves. At the same time, it also prevents the carrier from flipping or tilting when the clamping component presses it.

[0029] In this invention, one of the first ball grooves on the side of the carrier is a V-shaped ball groove and the other is a flat ball groove. It cooperates with the two second ball grooves to guide the balls. The cooperation between the V-shaped ball groove and the flat ball groove can reduce the assembly accuracy between the carrier and the base. Attached Figure Description

[0030] Figure 1 This is a top view of the structure of this utility model;

[0031] Figure 2 for Figure 1 AA section view;

[0032] Figure 3 for Figure 1 Exploded view;

[0033] Figure 4 for Figure 3 Further exploded view;

[0034] Figure 5 for Figure 4 Another perspective illustration;

[0035] Figure 6 for Figure 1 A schematic diagram of a structure excluding the outer shell and the upper spring;

[0036] Figure 7 for Figure 6 Partial structural diagram;

[0037] Figure 8 for Figure 7 Exploded view;

[0038] Figure 9 This is an exploded view showing the positional relationship between the clamping component and the second drive mechanism of this utility model. Detailed Implementation

[0039] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are only for illustrating the essential spirit of the technical solution of the present invention.

[0040] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that the embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0041] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0042] In the following description, in order to clearly demonstrate the structure and working method of this utility model, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0043] Reference Figures 1 to 9 This utility model provides a lens driving device, which includes a housing 10, a base 20, a first driving mechanism 30, a carrier 40, a clamping member 50, and a second driving mechanism 60.

[0044] The outer shell 10 covers the outside of the base 20. The outer shell 10 and the base 20 are detachably connected and form a hollow cavity. The first drive mechanism 30, the carrier 40, the clamping member 50, and the second drive mechanism 60 are all disposed within the hollow cavity. The outer shell 10 and the base 20 are preferably connected by a snap-fit ​​mechanism to form the hollow cavity.

[0045] The outer shell 10, the base 20 and the carrier 40 are provided with a longitudinally connected lens through hole in the middle of the longitudinal direction (i.e., the vertical direction or the Z-axis direction) to avoid or accommodate the lens. The lens is installed in the carrier 40 and the carrier 40 is set in the base 20. Under the action of the first drive mechanism 30, the carrier 40 and the lens installed in the carrier 40 move longitudinally relative to the base 20 to achieve the zoom effect of the lens.

[0046] The clamping member 50 is disposed within the base 20 and located on one side of the carrier 40. The second drive mechanism 60 drives the clamping member 50 to move horizontally closer to or further away from the carrier 40. The clamping member 50 abuts against one side of the carrier 40 to achieve positioning of the carrier 40 after zooming. This horizontal direction is perpendicular to the longitudinal direction. After the carrier 40 moves longitudinally, the second drive mechanism drives the clamping member 50 to move towards the carrier 40, pressing against the side wall of the carrier 40, thus achieving the positioning effect of the carrier 40 after zooming.

[0047] In one embodiment, reference is made to Figures 3 to 6 The first drive mechanism 30 includes an AF coil 31 disposed on the side of the carrier 40 and an AF magnet 32 ​​disposed on the inner wall of the housing 10. The AF magnet 32 ​​is disposed opposite to the AF coil 31, and after the AF coil 31 is energized, the carrier 40 moves longitudinally relative to the base 20.

[0048] In one embodiment, reference is made to Figures 3 to 5 The lens driving device also includes several upper springs 70, which are respectively connected between the top of the base 20 and the top of the carrier 40. The upper springs 70 are connected to the AF coil 31 through the carrier built-in circuit in the carrier 40. The base built-in circuit in the base 20 is connected to the AF coil 31 through the upper springs 70 and the carrier built-in circuit.

[0049] In this embodiment, the base's built-in circuit is connected to the carrier's built-in circuit via an upper spring 70, which supplies power to the AF coil 31. The upper spring 70 serves both to connect the circuit and to reset the carrier 40 after movement. With the cooperation of the AF magnet 32 ​​fixedly mounted on the inner wall of the outer shell 10, the carrier 40 moves longitudinally after the AF coil 31 is energized. After the movement, the second drive mechanism 60 drives the clamping member 50 to press the carrier 40, thus de-energizing the AF coil 31. After de-energizing, the position of the carrier 40 does not change, achieving the technical effect that the carrier 40 does not need to be supplied with current when it remains stationary. When the carrier 40 needs to move again, the second drive mechanism 60 moves the clamping member 50 away from the carrier 40, no longer pressing the carrier 40, thus energizing the AF coil 31 to control the longitudinal movement of the carrier 40.

[0050] In one embodiment, AF coils 31 are respectively provided on the two opposite outer sidewalls of the carrier 40, and AF magnets 32 are respectively provided on the two opposite inner sidewalls of the outer shell 10. Each AF magnet 32 ​​is arranged opposite to a corresponding AF coil 31.

[0051] In one embodiment, reference is made to Figure 4 and Figure 5The base 20 has a clearance opening 22 on its side wall to avoid the AF magnet 32 ​​and the AF coil 31. The clearance opening 22 is located on the side away from the clamping member 50.

[0052] In this embodiment, the clearance opening 22 on the base 20 allows the AF magnet 32 ​​and AF coil 31 to be arranged opposite each other without obstruction, increasing the driving stability of the first drive mechanism 30. Furthermore, the AF magnet 32 ​​and AF coil 31, arranged opposite each other, are located on the side away from the clamping member 50, avoiding mutual interference.

[0053] In one embodiment, reference is made to Figures 4 to 7 The carrier 40 has a first ball groove 41 on its outer side wall and a second ball groove 21 on its inner side wall. The first ball groove 41 and the second ball groove 21 are arranged opposite each other to form a guide ball groove 81. One or more balls 80 are arranged longitudinally in the guide ball groove 81.

[0054] In one embodiment, two first ball grooves 41 are provided on the outer side wall of the carrier 40, and the two first ball grooves 41 are located on the same side outer side wall of the carrier 40. Two second ball grooves 21 are provided on the inner side wall of the base 20, and the two second ball grooves 21 are located on the same side inner side wall of the base 20, so that two guide ball grooves 81 are formed on one side between the carrier 40 and the base 20.

[0055] In one embodiment, the guide ball groove 81 is located on the opposite side of the clamping member 50.

[0056] In one embodiment, reference is made to Figure 7 and Figure 8 One of the two guide ball grooves 81 contains a single ball and the other contains multiple balls.

[0057] In this context, "single ball" refers to a guide ball groove 81 containing only one ball 80. "Multiple ball" refers to a guide ball groove 81 containing several balls 80 arranged longitudinally.

[0058] Specifically, the multi-ball assembly includes a plurality of first balls 80a and at least one second ball 80b. The first balls 80a respectively contact the first ball groove 41 and the second ball groove 21. A second ball 80b is disposed between two adjacent first balls 80a. The outer diameter of the second ball 80b is smaller than that of the first ball 80a.

[0059] This invention uses a second ball 80b positioned between two adjacent first balls 80a within a guide ball groove 81. The three balls are arranged as a group for guidance and to reduce motion friction. The three balls are arranged in a two-large-one-small configuration, with the two large balls contacting the inner wall of the guide ball groove. The working principle is as follows: For example, when the carrier 40 moves upward, the bottom first ball 80a rotates clockwise, and the middle second ball 80b, which is in contact with the bottom first ball 80a, rotates counterclockwise. Simultaneously, the top first ball 80a, which is in contact with the middle second ball 80b, rotates clockwise. In other words, it allows both first balls 80a in contact with the inner wall of the guide ball groove to rotate clockwise, while the middle second ball 80b, which rotates counterclockwise, does not contact the inner wall of the guide ball groove or only contacts a portion of the guide ball groove on one side. This is because the outer diameter of the second ball 80b is smaller than that of the first ball 80a. Therefore, the second ball 80b will not contact the inner walls of the guide ball grooves on both the inner and outer sides at the same time, and will not exert opposite forces on the inner walls of the guide ball grooves. The three balls will produce a complementary effect under the rotation, which improves the rolling guidance effect of the balls. Ultimately, when the carrier 40 moves longitudinally, the friction is small, the movement is smooth, and the shaking phenomenon is avoided.

[0060] like Figure 7 As shown, three balls, one large and one small, are arranged longitudinally in the guide ball groove 81 formed by the first ball groove 41 and the second ball groove 21. From bottom to top, they are the bottom first ball 80a, the middle second ball 80b, and the top first ball 80b.

[0061] Of course, in another example, the guide ball groove 81 has five balls arranged longitudinally, three large and two small, arranged from bottom to top as the first ball, the second ball, the first ball, the second ball, and the first ball. In other examples, the guide ball groove 81 has an odd number of balls arranged longitudinally, following a design where one second ball is placed between two adjacent first balls. The number of balls can be determined based on the longitudinal length of the guide ball groove 81 and the longitudinal travel of the carrier 40.

[0062] In one embodiment, reference is made to Figure 5 , Figure 7 and Figure 8 An adsorption magnet 23 is provided on the inner wall of the base 20 between the two second ball grooves 21. The adsorption magnet 23 is positioned opposite to and adsorbs onto a metal sheet 43 disposed on one side of the carrier 40. The metal sheet 43 is preferably made of iron.

[0063] In this embodiment, an adsorption magnet 23 is provided between the two ball grooves. The adsorption magnet 23 and the metal sheet 43 provided on one side of the carrier 40 generate an adsorption force, so that the carrier 40 is pressed against the ball 80, preventing the ball 80 from falling out of the groove. At the same time, it also prevents the carrier 40 from flipping or tilting when the clamping member 50 presses the carrier 40.

[0064] In one embodiment, reference is made to Figure 5 One of the two first ball grooves 41 is a V-shaped ball groove 41a and the other is a flat ball groove 41b.

[0065] In this embodiment, one of the first ball grooves 41 provided on the side of the carrier 40 is a V-shaped ball groove 41a and the other is a flat ball groove 41b. It cooperates with the two second ball grooves 21 to guide the ball 80. The cooperation between the V-shaped ball groove 41a and the flat ball groove 41b can reduce the assembly accuracy between the carrier 40 and the base 20.

[0066] In one embodiment, reference is made to Figures 2 to 9 The second drive mechanism 60 employs a piezoelectric mechanism, which includes a piezoelectric block 61 and a friction rod 62. The piezoelectric block 61 is mounted on the base 20, specifically at the center of one side of the base 20. The friction rod 62 is connected to the piezoelectric block 61 and abuts against the clamping member 50. The piezoelectric block 61 deforms when energized and de-energized. By frequently energizing and de-energizing the piezoelectric block 61 at a preset switching frequency, the friction rod 62 generates a high-frequency extension and retraction motion, thereby driving the clamping member 50 to move towards the carrier 40. After movement, the carrier 40 is pressed against the side wall of the base 20, thus limiting the position of the carrier 40. When the carrier 40 needs to move again, the energizing and de-energizing action of the piezoelectric block 61 causes the clamping member 50 to move away from the carrier 40, allowing the carrier 40 to move again.

[0067] When the piezoelectric mechanism cooperates with the first drive mechanism 30, the first drive mechanism 30 first drives the carrier 40 to move longitudinally to achieve zoom operation. Then, the piezoelectric mechanism drives the clamping member 50 to move toward the carrier 40, thereby clamping the carrier 40. After clamping, the first drive mechanism 30, such as the AF coil 31, and the piezoelectric mechanism can be de-energized. After de-energization, the position of the carrier 40 will not change, achieving the technical effect that the carrier 40 does not need to be supplied with current when it remains stationary. When the carrier 40 needs to be moved again, the piezoelectric mechanism is energized in the direction away from the carrier 40. The piezoelectric mechanism drives the clamping member 50 away from the carrier 40 and no longer clamps the carrier 40. Then, the first drive mechanism 30, such as the AF coil 31, can be energized to control the longitudinal movement of the carrier 40.

[0068] In practice, the base 20 has built-in wiring that connects to and powers the piezoelectric block 61.

[0069] In one embodiment, reference is made to Figure 8 and Figure 9 The top of the clamping member 50 is provided with a friction rod guide groove 51, and the friction rod 62 extends into the friction rod guide groove 51.

[0070] The piezoelectric mechanism also includes a spring plate 63, with both ends of the spring plate 63 fixed to the clamping members 50 on both sides of the friction rod guide groove 51. The friction rod 62 is located between the spring plate 63 and the friction rod guide groove 51. The spring plate 63 abuts the friction rod 62 against the inner wall of the friction rod guide groove 51. When the piezoelectric block 61 is energized and de-energized and deformed, the friction rod 62 drives the spring plate 63 and the clamping members 50 to move horizontally.

[0071] In one embodiment, the friction rod guide groove 51 is an open groove with a top opening, which can be a V-shaped groove or a U-shaped groove.

[0072] Of course, the groove shape of the friction rod guide groove 51 is preferably similar to or the same as the outer surface of the friction rod 62. For example, when the friction rod 62 is cylindrical, the friction rod guide groove 51 is an arc-shaped groove so that the inner sidewall of the friction rod 62 fits into the friction rod guide groove 51.

[0073] In one embodiment, reference is made to Figure 8 and Figure 9 The piezoelectric mechanism also includes a counterweight plate 64, and a piezoelectric block 61 is mounted on the counterweight plate 64. Both the counterweight plate 64 and the piezoelectric block 61 are mounted in the piezoelectric mechanism mounting port 24 on one side of the base 20.

[0074] In practical implementation, electrical connection points can be set on the surface of the piezoelectric mechanism mounting port 24. The electrical connection points are respectively connected to the base built-in circuit and the piezoelectric block 61 in the base 20, so as to realize the purpose of supplying power to the piezoelectric block 61 through the base built-in circuit.

[0075] The preferred embodiments of this utility model have been described in detail above. However, it should be understood that after reading the above teachings, those skilled in the art can make various alterations or modifications to this utility model. These equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A lens driving device, the lens driving device comprising a housing, a base, a first driving mechanism and a carrier, the housing covering the outside of the base, the carrier being located inside the base, and the first driving mechanism driving the carrier to move longitudinally relative to the base; Its features are, The lens driving device also includes a clamping member and a second driving mechanism. The clamping member is disposed in the base and located on one side of the carrier. The second driving mechanism drives the clamping member to move horizontally closer to or away from the carrier. The clamping member abuts against one side of the carrier to achieve the positioning of the carrier after zooming.

2. The lens driving device as described in claim 1, characterized in that, The first driving mechanism includes an AF coil disposed on the side of the carrier and an AF magnet disposed on the inner side wall of the housing. The AF magnet is disposed opposite to the AF coil, and after the AF coil is energized, the carrier moves longitudinally relative to the base.

3. The lens driving device as described in claim 2, characterized in that, The lens driving device also includes a plurality of upper springs, which are respectively connected between the top of the base and the top of the carrier. The upper springs are connected to the AF coil through the carrier built-in circuit in the carrier. The base built-in circuit in the base is connected to the AF coil through the upper springs and the carrier built-in circuit. And / or, the AF coils are respectively provided on the two opposite outer sidewalls of the carrier, and the AF magnets are respectively provided on the two opposite inner sidewalls of the outer shell, with each AF magnet being arranged opposite to a corresponding AF coil; And / or, the side wall of the base is provided with a clearance opening for avoiding the AF magnet and the AF coil, the clearance opening being located on the side away from the clamping member.

4. The lens driving device as described in claim 1, characterized in that, The outer side wall of the carrier is provided with a first ball groove, and the inner side wall of the base is provided with a second ball groove. The first ball groove and the second ball groove are arranged opposite each other to form a guide ball groove. One or more balls are arranged longitudinally in the guide ball groove.

5. The lens driving device as described in claim 4, characterized in that, Two first ball grooves are provided on the outer wall of the carrier, and the two first ball grooves are located on the same side of the outer wall of the carrier. Two second ball grooves are provided on the inner wall of the base, and the two second ball grooves are located on the same side of the inner wall of the base, so that two guide ball grooves are formed on one side between the carrier and the base. And / or, the guide ball groove is located on the opposite side of the clamping member.

6. The lens driving device as described in claim 5, characterized in that, One of the two guide ball grooves contains a single ball and the other contains multiple balls; The multi-ball bearing includes a plurality of first balls and at least one second ball. The first balls respectively contact the first ball groove and the second ball groove. A second ball is disposed between two adjacent first balls. The outer diameter of the second ball is smaller than that of the first ball.

7. The lens driving device as described in claim 5, characterized in that, An adsorption magnet is provided on the inner wall of the base between the two second ball grooves. The adsorption magnet is positioned opposite to and adsorbs with a metal sheet disposed on one side of the carrier. And / or, one of the two first ball grooves is a V-shaped ball groove and the other is a flat ball groove.

8. The lens driving device according to any one of claims 1 to 7, characterized in that, The second driving mechanism adopts a piezoelectric mechanism, which includes a piezoelectric block and a friction rod. The piezoelectric block is mounted on the base, and the friction rod is connected to the piezoelectric block. The friction rod abuts against the clamping member. When the piezoelectric block is energized and de-energized, causing deformation, the friction rod drives the clamping member to move horizontally.

9. The lens driving device as described in claim 8, characterized in that, The top of the clamping member is provided with a friction rod guide groove, and the friction rod extends into the friction rod guide groove; The piezoelectric mechanism also includes a spring sheet, the two ends of which are fixed to the clamping members on both sides of the friction rod guide groove. The friction rod is located between the spring sheet and the friction rod guide groove. The spring sheet presses the friction rod against the inner wall of the friction rod guide groove. When the piezoelectric block is energized and de-energized and deforms, the friction rod drives the spring sheet and the clamping members to move horizontally.

10. The lens driving device as claimed in claim 8, characterized in that, The piezoelectric mechanism also includes a counterweight plate, and the piezoelectric block is mounted on the counterweight plate. Both the counterweight plate and the piezoelectric block are mounted in the piezoelectric mechanism mounting port on one side of the base.

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