Large-stroke three-axis camera shooting driving device

Abstract

The utility model aims to provide a large-stroke three-axis camera driving device. The large-stroke three-axis camera driving device comprises a protective shell, a base, a carrier assembly, an upper cover, an elastic sheet connecting piece, a focusing driving assembly and an anti-shake driving assembly, the anti-shake driving assembly comprises a first anti-shake driving magnet, a second anti-shake driving magnet and an anti-shake driving coil; wherein the first anti-shake driving magnet, the second anti-shake driving magnet and the anti-shake driving coil are correspondingly arranged. The utility model relates to the technical field of camera devices, in the OIS anti-shake direction, a mode that the first anti-shake driving magnet and the second anti-shake driving magnet which are arranged on the upper layer and the lower layer are matched with the anti-shake driving coil located in the middle of the two magnets is adopted, and the thrust of the double-layer magnets can be twice that of single-layer driving, so that the stroke in the OIS direction is greatly improved; and the requirements of long stroke and large weight of the VA motor can be met simultaneously.

Description

Technical Field

[0001] The utility model relates to the technical field of camera devices, in particular to a long-stroke three-axis camera driving device. Background Art

[0002] In order to solve the problem of shaking caused by external forces during smartphone photography, which in turn leads to unclear imaging or blurred images, optical image stabilization technology has gradually become one of the main selling points in the mobile phone camera market. The anti-shake structure of the common three-axis camera drive mechanism on the market mostly adopts a single-layer drive structure, that is, a single-layer drive magnet is matched with a single-layer drive coil, with the magnet as the mover and the coil as the stator. This type of motor has low thrust and cannot meet customers' long-stroke requirements, and the anti-shake effect is poor. In addition, because high-end products require an external VA motor, this structure cannot withstand the weight of the VA motor. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a long-stroke three-axis camera drive device, which solves the problem that the motor thrust of the existing camera device is small, the anti-shake effect is poor, and the long-stroke requirements of customers cannot be met.

[0004] To achieve the above object, the utility model is implemented by the following technical scheme: a long-stroke three-axis camera driving device, the device comprising:

[0005] Protective case;

[0006] A base, which is engaged with the protective shell to form a receiving space, and a first metal reinforcement is arranged in the base;

[0007] A carrier assembly is arranged in the accommodation space, comprising an anti-shake frame and a lens support body arranged from outside to inside in the accommodation space, a second metal reinforcement member is arranged in the anti-shake frame, and a third metal reinforcement member is arranged in the lens support body;

[0008] An upper cover, disposed between the protective shell and the base;

[0009] A spring connecting piece, wherein the spring connecting piece is respectively connected to the base, the anti-shake frame and the lens supporting body;

[0010] A focus driving assembly, disposed on the carrier assembly;

[0011] The anti-shake drive component includes a first anti-shake drive magnet, a second anti-shake drive magnet and an anti-shake drive coil, wherein the first anti-shake drive magnet is fixed on two adjacent sides of the base, the second anti-shake drive magnet is fixed on two adjacent sides of the upper cover, and the anti-shake drive coil is fixed on two adjacent sides of the anti-shake frame and is electrically connected to the second metal reinforcement in the anti-shake frame; wherein the first anti-shake drive magnet, the second anti-shake drive magnet and the anti-shake drive coil are arranged correspondingly.

[0012] Preferably, the spring connector includes:

[0013] There are four first spring pieces, each of which is electrically connected to a first metal reinforcement member in the base, a second metal reinforcement member in the anti-shake frame, and a third metal reinforcement member in the lens support body;

[0014] There are four second spring pieces, and the second spring pieces are electrically connected to the first metal reinforcement in the base and the second metal reinforcement in the anti-shake frame.

[0015] Preferably, a first anti-shake magnetic conductive sheet is arranged between the first anti-shake driving magnet and the base; and a second anti-shake magnetic conductive sheet is arranged between the second anti-shake driving magnet and the upper cover.

[0016] Preferably, the focus drive assembly includes a focus drive magnet and a focus drive coil; the focus drive magnet is arranged on the side wall surface of the lens support body, and the focus drive coil is arranged on the side wall surface of the anti-shake frame, and is electrically connected to the second metal reinforcement in the anti-shake frame, and the focus drive magnet and the focus drive coil are arranged relative to each other.

[0017] Preferably, a positioning frame is provided on the side wall surface of the lens support body, and the focus driving magnet is arranged in the positioning frame;

[0018] A focus magnetic conductive sheet is arranged in the positioning frame, and the focus magnetic conductive sheet is located between the lens support body and the focus driving magnet; in a top view projection, the focus magnetic conductive sheet, the focus driving magnet and the focus driving coil are arranged in sequence.

[0019] Preferably, the device further comprises a focus guide assembly, wherein the focus guide assembly comprises two sliding shafts, which are diagonally arranged between the lens support body and the anti-shake frame;

[0020] A groove for accommodating a sliding shaft is arranged inside the anti-shake frame, the sliding shaft is fixed to the anti-shake frame, and the sliding shaft is in frictional contact with the lens support body.

[0021] Preferably, the device further comprises a focusing magnetic attraction component, and the focusing magnetic attraction component comprises a focusing magnetic attraction sheet and a magnet;

[0022] The focusing magnetic sheet comprises a first focusing magnetic sheet and a second focusing magnetic sheet; wherein one end of the focusing magnetic conductive sheet is bent to form the first focusing magnetic sheet, and the second focusing magnetic sheet is embedded in the lens support body;

[0023] There are two magnets fixed on the anti-shake frame, and the magnets are arranged close to the sliding shaft; the first focusing magnetic suction plate and the second focusing magnetic suction plate respectively attract each other with the magnets to generate magnetic attraction and act on the sliding shaft respectively.

[0024] Preferably, the device further comprises an anti-shake guide assembly, wherein the anti-shake guide assembly comprises balls, and the balls are arranged at four corners where the bottom of the anti-shake frame contacts the base.

[0025] Preferably, the device also includes an anti-shake magnetic suction component, which includes an anti-shake magnetic suction sheet, and the anti-shake magnetic suction sheet is embedded in the anti-shake frame. The anti-shake magnetic suction sheet and the first anti-shake driving magnet attract each other to generate magnetic attraction and act on the ball.

[0026] Preferably, the device further includes a focus sensor and an anti-shake sensor;

[0027] The focus sensor is arranged on the side wall surface of the anti-shake frame and is electrically connected to the second metal reinforcement member in the anti-shake frame;

[0028] The anti-shake sensor is arranged on two adjacent side edges of the anti-shake frame and is electrically connected to the second metal reinforcement member in the anti-shake frame. Beneficial Effects

[0029] By using a long-stroke three-axis camera drive device provided by the utility model, the OIS anti-shake direction adopts a double-layer first anti-shake drive magnet and a second anti-shake drive magnet with an anti-shake drive coil located in the middle of the two magnets. The thrust of the double-layer magnet can reach twice that of the single-layer drive, thereby greatly improving the stroke in the OIS direction and meeting the long stroke and large weight requirements of the VA motor at the same time. At the same time, the base and the anti-shake frame are connected by the spring, and the coil and the anti-shake frame are electrically connected. The moving coil is used to reduce the weight of the movable part while meeting the large stroke of the double-layer drive structure, so that the thrust required to achieve the same stroke is smaller, and the assembly process is smoother than the traditional magnet method. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is the overall assembly diagram of the drive device of the utility model;

[0031] Figure 2 This is a three-dimensional assembly diagram of the drive device of the utility model after removing the outer shell;

[0032] Figure 3 This is a schematic diagram of the explosion structure of the driving device of the utility model;

[0033] Figure 4 This is a schematic diagram of the OIS explosion structure of the drive device of the utility model;

[0034] Figure 5 This is a schematic diagram of the AF explosion structure of the drive device of the utility model;

[0035] Figure 6 This is a schematic diagram of the structure of the focusing magnetic suction component of the utility model;

[0036] Figure 7 This is a schematic diagram of the structure of the anti-shake magnetic suction component of the utility model;

[0037] Figure 8 It is a schematic diagram of the structure of the spring connecting piece of the utility model.

[0038] Explanation of symbols in the figure

[0039] 1. Protective shell, 2. Upper cover, 3. Second anti-shake driving magnet, 4. Spring clip connector, 41. First spring clip, 42. Second spring clip, 5. Focus driving magnet, 6. Lens support, 7. Anti-shake frame, 8. Sliding shaft, 9. Focus driving coil, 10. Anti-shake driving coil, 11. Ball, 12. Base, 13. First anti-shake driving magnet, 14. Second anti-shake magnetic sheet, 15. Anti-shake sensor, 16. Anti-shake magnetic sheet, 17. First anti-shake magnetic sheet, 18. First focus magnetic sheet, 19. Focus magnetic sheet, 20. Second focus magnetic sheet, 21. Focus sensor, 22. Magnet. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. As long as the effect of the utility model can be exerted, various changes can be made to the implementation scheme.

[0041] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process.

[0042] Reference Figure 1-8 A large-stroke three-axis camera drive device according to this embodiment is described.

[0043] In this embodiment, the device includes a protective shell 1, a base 12, a carrier assembly, an upper cover 2, a spring connector 4, a focus drive assembly, an anti-shake drive assembly, an anti-shake guide assembly, an anti-shake magnetic suction component, a focus guide assembly and a focus magnetic suction assembly.

[0044] The protective shell 1 and the base 12 are buckled together to form a receiving space. A first metal reinforcement is arranged in the base 12; the first metal reinforcement is embedded in the base 12 to strengthen the strength of the base 12 and to conduct the internal and external circuits.

[0045] The carrier assembly is arranged in the accommodating space, including an anti-shake frame 7 and a lens support body 6 arranged from the outside to the inside of the accommodating space, a second metal reinforcement is arranged in the anti-shake frame 7, and a third metal reinforcement is arranged in the lens support body 6.

[0046] The upper cover 2 is disposed between the protective shell 1 and the base 12; the upper cover is in a "∟" shape, disposed between the protective shell 1 and the base 12, and covers two adjacent surfaces of the base 12. The upper cover 2 is fixedly connected to the base 12, or after the upper cover 2 and the protective shell 1 are assembled, the protective shell 1 and the base 12 are buckled.

[0047] The spring connector 4 is connected to the base 12, the lens support 6 and the anti-shake frame 7 respectively;

[0048] The elastic sheet connector 4 includes a first elastic sheet 41 and a second elastic sheet 42 .

[0049] There are four first spring pieces 41, which are arranged at the four corners of the base 12 and the anti-shake frame 7. The first spring pieces 41 are electrically connected to the first metal reinforcement in the base 12, the second metal reinforcement in the anti-shake frame 7 and the third metal reinforcement in the lens support body 6; the electrical signal powers on the focus drive coil 9 and the focus sensor 21 through the first metal reinforcement in the base 12 and the second metal reinforcement in the anti-shake frame 7; at the same time, the electrical signal powers on the VA motor through the first metal reinforcement in the base 12, the second metal reinforcement in the anti-shake frame 7 and the third metal reinforcement in the lens support body 6.

[0050] There are four second spring pieces 42, which are arranged at the four corners of the base 12 and the anti-shake frame 7 in a continuously bent shape, and the second spring pieces 42 are electrically connected to the first metal reinforcement in the base 12 and the second metal reinforcement in the anti-shake frame 7. The electrical signal powers the anti-shake drive coil 10 and the anti-shake sensor 15 through the first metal reinforcement in the base 12 and the second metal reinforcement in the anti-shake frame 7.

[0051] A focus driving assembly is arranged on the carrier assembly, and provides a driving force in the Z direction for the lens support body 6; the focus driving assembly includes a focus driving magnet 5 and a focus driving coil 9; the focus driving magnet 5 is arranged on the side wall surface of the lens support body 6, the focus driving coil 9 is arranged on the side wall surface of the anti-shake frame 7, and is electrically connected to the second metal reinforcement member in the anti-shake frame 7, and the focus driving magnet 5 and the focus driving coil 9 are arranged opposite to each other;

[0052] A positioning frame is provided on the side wall surface of the lens support body 6, and the focus driving magnet 5 is arranged in the positioning frame; a focus magnetic conductive sheet 19 is provided in the positioning frame, and the function of the focus magnetic conductive sheet 19 is to make the magnetic field of the focus driving magnet 5 stronger, and the focus magnetic conductive sheet 19 is located between the lens support body 6 and the focus driving magnet 5; in the top view projection, the focus magnetic conductive sheet 19, the focus driving magnet 5 and the focus driving coil 9 are arranged in sequence.

[0053] The device further includes a focus sensor 21 and an anti-shake sensor 15; the focus sensor 21 is arranged on the side wall surface of the anti-shake frame 7, and the focus sensor 21 is electrically connected to the second metal reinforcement in the anti-shake frame 7. The anti-shake sensor 15 is arranged on two adjacent side edges of the anti-shake frame 7, and the anti-shake sensor 15 is electrically connected to the second metal reinforcement in the anti-shake frame 7.

[0054] The anti-shake drive component includes a first anti-shake drive magnet 13, a second anti-shake drive magnet 3 and an anti-shake drive coil 10, wherein the two first anti-shake drive magnets 13 are fixed on two adjacent sides of the base 12, the two second anti-shake drive magnets 3 are fixed on two adjacent sides of the upper cover 2, and the two anti-shake drive coils 10 are fixed on two adjacent sides of the anti-shake frame 7, and are electrically connected to the second metal reinforcement in the anti-shake frame 7; wherein the first anti-shake drive magnet 13, the second anti-shake drive magnet 3 and the anti-shake drive coil 10 on each side are arranged correspondingly; by adopting an upper and lower group of anti-shake drive magnets and arranging the anti-shake drive coil 10 in the middle, the thrust in the X and Y directions is increased, the anti-shake long stroke requirement is met, and the anti-shake effect is better. The upper and lower groups of anti-shake driving magnets are: two second anti-shake driving magnets 3 located at the upper cover 2, and two first anti-shake driving magnets 13 located on the lower base 12; the thrust of the double-layer driving magnet can reach twice that of the single-layer drive, thereby greatly improving the stroke in the OIS direction, and can simultaneously meet the long stroke and large weight requirements of the VA motor. At the same time, compared with the traditional magnet method, the coil reduces the weight of the movable part, and the thrust required to achieve the same stroke is smaller, and the assembly process is smoother than the traditional magnet method.

[0055] A second anti-shake magnetic conductive sheet 14 is arranged between the second anti-shake driving magnet 3 and the upper cover 2, and a first anti-shake magnetic conductive sheet 17 is arranged between the first anti-shake driving magnet 13 and the base 12. The second anti-shake magnetic conductive sheet 14 and the first anti-shake magnetic conductive sheet 17 are used to make the magnetic force of the second anti-shake driving magnet 3 and the first anti-shake driving magnet 13 stronger.

[0056] The anti-shake guide assembly includes balls 11, which are arranged at the four corners where the bottom of the anti-shake frame 7 contacts the base 12. The balls 11 are plane balls, which reduce the friction between the anti-shake frame 7 and the base 12.

[0057] The anti-shake magnetic component includes an anti-shake magnetic sheet 16, which is embedded in the anti-shake frame 7. The anti-shake magnetic sheet 16 and the first anti-shake driving magnet 13 attract each other to generate magnetic attraction and act on the ball 11, pre-pressing the ball 11, so that the anti-shake frame 7 will not tilt during movement, and the performance is more stable.

[0058] The focus guide assembly includes two sliding shafts 8, which are diagonally arranged between the lens support body 6 and the anti-shake frame 7; a groove that can accommodate the sliding shaft 8 is arranged on the inner side of the anti-shake frame 7, and the sliding shaft 8 is fixed to the anti-shake frame 7, and the sliding shaft 8 is in friction contact with the lens support body 6.

[0059] The focus magnetic suction component includes a focus magnetic suction sheet and a magnet 22, and the focus magnetic suction sheet and the magnet 22 are correspondingly arranged; the focus magnetic suction sheet includes a first focus magnetic suction sheet 18 and a second focus magnetic suction sheet 20; wherein one end of the focus magnetic conductive sheet 19 is bent to form the first focus magnetic suction sheet 18, and the second focus magnetic suction sheet 20 is embedded in the lens support body 6;

[0060] There are two magnets 22 fixed on the anti-shake frame 7, and the magnets 22 are arranged close to the sliding shaft 8; the first focus magnetic sheet 18 and the second focus magnetic sheet 20 respectively attract each other with the two magnets 22 to generate magnetic attraction and act on the sliding shaft 8 respectively. The sliding shaft 8 is pre-pressed so that the lens support body 6 will not tilt during the movement, and the performance is more stable.

[0061] Working principle:

[0062] Working in AF direction: the external electrical signal is transmitted to the anti-shake frame 7 through the first metal reinforcement and the first spring 41 at the bottom of the base 12, the focus drive coil 9 and the focus sensor 21 are electrically connected to the second metal reinforcement in the anti-shake frame 7, the electrical signal is transmitted to the focus drive coil 9 through the second metal reinforcement in the anti-shake frame 7, the focus drive coil 9 generates a Lorentz force with the focus drive magnet 5 after being energized, and the lens support 6 is driven by the focus drive magnet 5 to move along the Z-axis direction through the sliding shaft 8 to achieve the focusing function; the electrical signal is transmitted to the focus sensor 21 through the second metal reinforcement in the anti-shake frame 7 to achieve the focus adjustment;

[0063] Working in OIS direction: the external electrical signal is transmitted to the anti-shake frame 7 through the first metal reinforcement and the second spring piece 42 at the bottom of the base 12, the anti-shake drive coil 10 and the anti-shake sensor 15 are electrically connected to the second metal reinforcement in the anti-shake frame 7, and the electrical signal is transmitted to the anti-shake drive coil 10 through the second metal frame reinforcement in the anti-shake frame 7. After the anti-shake drive coil 10 is energized, it generates a Lorentz force with the first anti-shake drive magnet 13 and the second anti-shake drive magnet 3. The first anti-shake drive magnet 13 and the second anti-shake drive magnet 3 drive the anti-shake frame 7 and the lens support body 6 to move along the X and Y axes through the ball 11 to realize the anti-shake function; the electrical signal is transmitted to the anti-shake sensor 15 through the second metal reinforcement in the anti-shake frame 7 to realize the adjustment of the anti-shake.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A long-stroke three-axis camera drive device, characterized in that: The device comprises: Protective case (1); A base (12) is interlocked with the protective shell (1) to form a receiving space, and a first metal reinforcement is arranged in the base (12); A carrier assembly is arranged in the accommodating space, comprising an anti-shake frame (7) and a lens support body (6) arranged from the outside to the inside of the accommodating space, wherein a second metal reinforcement member is arranged in the anti-shake frame (7), and a third metal reinforcement member is arranged in the lens support body (6); An upper cover (2) is arranged between the protective shell (1) and the base (12); A spring-type connecting member (4), the spring-type connecting member (4) being respectively connected to the base (12), the anti-shake frame (7) and the lens support body (6); A focus driving assembly, disposed on the carrier assembly; The anti-shake drive component comprises a first anti-shake drive magnet (13), a second anti-shake drive magnet (3) and an anti-shake drive coil (10), wherein the first anti-shake drive magnet (13) is fixed on two adjacent sides of the base (12), the second anti-shake drive magnet (3) is fixed on two adjacent sides of the upper cover (2), and the anti-shake drive coil (10) is fixed on two adjacent sides of the anti-shake frame (7) and is electrically connected to a second metal reinforcement member in the anti-shake frame (7); wherein the first anti-shake drive magnet (13), the second anti-shake drive magnet (3) and the anti-shake drive coil (10) are arranged correspondingly.

2. A long-stroke three-axis camera driving device according to claim 1, characterized in that: The spring connecting member (4) comprises: four first spring pieces (41), the first spring pieces (41) being electrically connected to a first metal reinforcement piece in the base (12), a second metal reinforcement piece in the anti-shake frame (7), and a third metal reinforcement piece in the lens support body (6); There are four second spring sheets (42), and the second spring sheets (42) are electrically connected to the first metal reinforcement member in the base (12) and the second metal reinforcement member in the anti-shake frame (7).

3. The long-stroke three-axis camera driving device according to claim 1, characterized in that: A first anti-shake magnetic conductive sheet (17) is provided between the first anti-shake driving magnet (13) and the base (12); and a second anti-shake magnetic conductive sheet (14) is provided between the second anti-shake driving magnet (3) and the upper cover (2).

4. The long-stroke three-axis camera driving device according to claim 1, characterized in that: The focus drive assembly comprises a focus drive magnet (5) and a focus drive coil (9); the focus drive magnet (5) is arranged on the side wall surface of the lens support body (6), and the focus drive coil (9) is arranged on the side wall surface of the anti-shake frame (7), and is electrically connected to a second metal reinforcement member in the anti-shake frame (7), and the focus drive magnet (5) and the focus drive coil (9) are arranged relative to each other.

5. The long-stroke three-axis camera driving device according to claim 4, characterized in that: A positioning frame is provided on the side wall surface of the lens support body (6), and the focus driving magnet (5) is arranged in the positioning frame; A focus magnetic conductive sheet (19) is arranged in the positioning frame, and the focus magnetic conductive sheet (19) is located between the lens support body (6) and the focus driving magnet (5); in a top view projection, the focus magnetic conductive sheet (19), the focus driving magnet (5) and the focus driving coil (9) are arranged in sequence.

6. The long-stroke three-axis camera driving device according to claim 1, characterized in that: The device further comprises a focus guide assembly, the focus guide assembly comprising two sliding shafts (8) which are arranged diagonally between the lens support body (6) and the anti-shake frame (7); A groove capable of accommodating a sliding shaft (8) is provided on the inner side of the anti-shake frame (7); the sliding shaft (8) is fixed to the anti-shake frame (7); and the sliding shaft (8) is in frictional contact with the lens support body (6).

7. The long-stroke three-axis camera driving device according to claim 1, characterized in that: The device also includes a focusing magnetic attraction component, which includes a focusing magnetic attraction sheet and a magnet (22); The focusing magnetic sheet comprises a first focusing magnetic sheet (18) and a second focusing magnetic sheet (20); wherein one end of the focusing magnetic conductive sheet (19) is bent to form the first focusing magnetic sheet (18), and the second focusing magnetic sheet (20) is embedded in the lens support body (6); There are two magnets (22) fixed on the anti-shake frame (7), and the magnets (22) are arranged close to the sliding shaft (8); the first focusing magnetic attraction sheet (18) and the second focusing magnetic attraction sheet (20) respectively attract each other with the magnets (22) to generate magnetic attraction forces and respectively act on the sliding shaft (8).

8. The long-stroke three-axis camera driving device according to claim 1, characterized in that: The device further comprises an anti-shake guide assembly, the anti-shake guide assembly comprising a ball (11), the ball (11) being arranged at the four corners where the bottom of the anti-shake frame (7) contacts the base (12).

9. The long-stroke three-axis camera driving device according to claim 1, characterized in that: The device further comprises an anti-shake magnetic attraction component, wherein the anti-shake magnetic attraction component comprises an anti-shake magnetic attraction sheet (16), wherein the anti-shake magnetic attraction sheet (16) is embedded in the anti-shake frame (7), and the anti-shake magnetic attraction sheet (16) and the first anti-shake driving magnet (13) attract each other to generate a magnetic attraction force which acts on the ball (11).

10. The long-stroke three-axis camera driving device according to claim 1, characterized in that: The device also includes a focus sensor (21) and an anti-shake sensor (15); The focus sensor (21) is arranged on a side wall surface of the anti-shake frame (7) and is electrically connected to a second metal reinforcement member in the anti-shake frame (7); The anti-shake sensor (15) is arranged on two adjacent side edges of the anti-shake frame (7) and is electrically connected to a second metal reinforcement member in the anti-shake frame (7).

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