Periscopic lens mechanism

Abstract

The application discloses a periscope lens mechanism, which comprises a prism part and a lens driving device, wherein the prism part is arranged at the front end of the lens driving device. The lens driving device comprises a shell, a carrier, a lower driving part, a base, balls and protective sheets. The balls and the protective sheets are arranged between the carrier and the base. The base is provided with ball mounting grooves, and a ball is arranged in each ball mounting groove. The lens driving device further comprises a base-embedded metal sheet, which is arranged on the base and is provided with a protruding sheet. The protruding sheet extends into the ball mounting groove on the base, and the ball is arranged in the ball mounting groove and located on the protruding sheet. The bottom surface of the carrier is provided with protective sheet mounting grooves at four corners, and a metal protective sheet is arranged in each protective sheet mounting groove. The metal protective sheet is located above the ball.

Description

Technical Field

[0001] This invention relates to the field of optical imaging, and more specifically to a periscope lens mechanism. Background Technology

[0002] Existing periscope lens assemblies typically employ a suspension wire structure. However, suspension wire structures are difficult to assemble and have low reliability. When subjected to impact, the suspension wire is easily damaged, leading to the failure of the entire component. Summary of the Invention

[0003] The purpose of this invention is to provide a periscope lens mechanism to solve the problems existing in the prior art.

[0004] To address the aforementioned problems, according to one aspect of the present invention, a periscope lens mechanism is provided, the periscope lens mechanism comprising a prism portion and a lens driving device, the prism portion being disposed at the front end of the lens driving device;

[0005] The lens driving device includes a housing, a carrier, a lower driving part, a base, ball bearings, and a protective sheet;

[0006] The carrier is used to mount the lens;

[0007] The lower drive section is located below the carrier;

[0008] A ball bearing and a protective sheet are provided between the carrier and the base;

[0009] The carrier, the lower drive portion, the ball bearing, and the protective sheet are encapsulated within the space defined by the base and the housing;

[0010] The base is provided with a ball bearing mounting groove;

[0011] The lens driving device also includes a metal plate embedded in the base, the metal plate embedded in the base is disposed on the base, the metal plate embedded in the base is provided with a protrusion, the protrusion extends into the ball mounting groove on the base, and the ball is disposed in the ball mounting groove and located on the protrusion.

[0012] The carrier is provided with a protective plate mounting groove, and a metal protective plate is provided in the protective plate mounting groove, with the metal protective plate located above the ball.

[0013] In one embodiment, the periscope lens mechanism further includes an upper drive portion, which includes a frame, an upper circuit board, an upper coil, and an upper magnet. The upper circuit board is disposed above the frame, the upper magnet is disposed on the upper surface of the carrier, and the upper coil is disposed at the bottom of the upper circuit board.

[0014] In one embodiment, the upper driving portion further includes an upper metal sheet disposed between the lower surface of the upper magnet and the upper surface of the carrier.

[0015] In one embodiment, the lower drive portion includes a lower circuit board, a lower magnet, and a lower coil. The lower circuit board is disposed on the base, the lower magnet is disposed at the bottom of the carrier, and the lower coil is disposed on the base.

[0016] In one embodiment, the lower drive portion further includes a lower metal sheet disposed between the upper surface of the lower magnet and the lower surface of the carrier.

[0017] In one embodiment, the lens driving device further includes a sensor and a sensor magnet. The sensor is disposed within the space defined by the lower coil, and the sensor magnet is fixedly disposed at the bottom of the carrier and corresponds to the sensor. The sensor is connected to the control module and detects the displacement of the carrier by detecting the displacement of the sensor magnet.

[0018] In one embodiment, the lower drive portion includes four lower magnets and two lower coils. The two lower coils are arranged opposite each other on the upper surface of the base. The sensor includes a first sensor and a second sensor, which are respectively disposed within the two coils. The sensor magnet is disposed between two magnets on the same side and corresponds to the first sensor and the second sensor respectively. The first sensor and the second sensor respectively detect the displacement of the carrier in the optical axis direction and the displacement perpendicular to the optical axis direction.

[0019] The periscope lens driving device of this application controls the movement along the optical axis and perpendicular to the optical axis through two independent modules on upper and lower circuit boards. It employs a combination of ball bearings and protective metal sheets for support and structural reinforcement, and has corresponding independent sensors for detection and control along both the optical axis and perpendicular to it. This results in a simple structure, reducing the number of required components and significantly enhancing reliability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the periscope lens drive structure.

[0021] Figure 2 This is an exploded perspective view of a periscope lens driving device according to an embodiment of the present invention.

[0022] Figure 3 This is an exploded perspective view of the upper driving portion according to an embodiment of the present invention.

[0023] Figure 4This is a perspective view of a carrier according to an embodiment of the present invention.

[0024] Figure 5 yes Figure 4 A bottom view of the carrier.

[0025] Figure 6 This is an exploded view of the lower driving portion according to an embodiment of the present invention.

[0026] Figure 7 This is a perspective view of the base according to an embodiment of the present invention.

[0027] Figure 8 This is a perspective view of a metal sheet embedded in the base according to an embodiment of the present invention.

[0028] Figure 9 This is an exploded perspective view of the carrier, lower drive part, and base assembly of a lens driving device according to an embodiment of the present invention.

[0029] Figure 10 This is an exploded perspective view of the upper driving part, carrier, lower driving part, base and other components of a lens driving device according to an embodiment of the present invention.

[0030] Figure 11 This is a cross-sectional view of the assembled lens driving device according to an embodiment of the present invention. Detailed Implementation

[0031] 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.

[0032] 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 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.

[0033] 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.

[0034] In the following description, in order to clearly demonstrate the structure and working method of the present invention, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outer", "inner", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0035] This invention generally relates to periscope lens structures. See below for details. Figure 1 A brief explanation of the periscope lens structure.

[0036] Figure 1 This is a schematic diagram of the periscope lens drive structure. (Example) Figure 1 As shown, a periscope lens structure typically comprises two parts: a periscope section 100 and a prism section 200. The prism section 200 is located at the front end of the periscope section 100, and an imaging chip 300 is located at the rear end of the periscope section 100. Light is reflected by the prism section 200 and enters the periscope section 100. The periscope section 100 includes an AF section and an OIS section. The AF section is responsible for optical zoom, and the OIS section is responsible for image stabilization. However, the OIS section of the periscope section only provides image stabilization along one axis X perpendicular to the optical axis Z, while the OIS section of the prism section provides image stabilization along the X axis, which is perpendicular to both the Z and Y axes.

[0037] The embodiments described below are primarily for the periscope section 100.

[0038] The periscope section 100, also referred to in this invention as a periscope lens drive device, typically includes a housing, an upper drive section, a carrier, a lower drive section, a base, ball bearings, and a protective plate. The carrier mounts the lens and defines an axis along the optical axis of the lens. The upper drive section is positioned above the carrier and drives the carrier to move along the optical axis, thereby achieving optical zoom. The lower drive section is positioned below the carrier and drives the carrier to move along an axis perpendicular to the optical axis, thereby achieving image stabilization. Ball bearings and a protective plate are positioned between the carrier and the base, serving to support and carry the carrier. The upper drive section, carrier, lower drive section, ball bearings, and protective plate are all encapsulated within the space defined by the base and the housing.

[0039] The periscope lens driving device of the present invention has a simple structure, reducing the number of required parts. It uses a ball bearing structure instead of a suspension wire structure, which enhances reliability. The carrier grooves are equipped with metal plates to facilitate the assembly of magnets. The magnets are equipped with metal iron plates to strengthen the magnetic field.

[0040] The periscope lens driving device 100 of the present invention will now be described in detail with reference to the accompanying drawings.

[0041] Figure 2This is an exploded perspective view of a periscope lens driving device 100 (hereinafter referred to as lens driving device 100) according to an embodiment of the present invention, as shown below. Figure 2 As shown, the lens drive device 100 includes a housing 10, an upper drive portion 20, a carrier 30, a lower drive portion 40, a base 50, a ball bearing 72, and a protective plate 71. The carrier 30 is used to mount a lens (not shown) and defines an axis along the optical axis of the lens. The upper drive portion 20 is positioned above the carrier 30 and drives the carrier 30 to move along the optical axis to achieve optical zoom. The lower drive portion 40 is positioned below the carrier 30 and drives the carrier 30 to move along an axis perpendicular to the optical axis to achieve image stabilization. The ball bearing 72 and the protective plate 71 are disposed between the carrier 30 and the base 50, serving to support and carry the carrier 30. The upper drive portion 20, carrier 30, lower drive portion 40, ball bearing 72, and protective plate 71 are encapsulated within the space defined by the base 50 and the housing 10.

[0042] Figure 3 This is an exploded perspective view of the upper driving portion 20 according to an embodiment of the present invention. Figure 2 As shown, the upper drive part 20 includes an upper circuit board 21, a frame 23, an upper coil 22, and an upper magnet 24. The upper circuit board 21 is disposed above the frame 23, the upper magnet 24 is disposed on the upper surface of the carrier 30, and the upper coil 22 is disposed at the bottom of the upper circuit board 21 and cooperates with the upper magnet 24 so that when the upper coil 22 is energized, it drives the carrier 30 to move along the optical axis to achieve the optical zoom function.

[0043] In one embodiment, the upper drive portion 20 further includes an upper metal plate 25, which is disposed on the lower surface of the upper magnet 24. When the upper magnet 24 is mounted on the carrier 30, the upper metal plate 25 is located between the lower surface of the upper magnet 24 and the upper surface of the carrier 30. During operation, the carrier 30 is driven by applying current to the upper coil 22 of the upper circuit board 21, thereby achieving optical zoom through direct electromagnetic interaction with the upper magnet 24 on the carrier 30. In this process, the upper metal plate 25 strengthens the magnetic field.

[0044] Figure 4 This is a perspective view of the carrier 30 according to an embodiment of the present invention. Figure 5 This is a bottom view of the carrier 30 according to an embodiment of the present invention. Figure 4-5 As shown, the carrier includes an integrally formed lens support portion 31 and a first side portion 32 and a second side portion 33 located on both sides of the lens support portion 31. The lens support portion 31 is provided with a lens mounting hole 311 extending along the optical axis. The upper surfaces of the first side portion 32 and the second side portion 33 are provided with an upper magnet mounting groove 34 for accommodating an upper magnet 24.

[0045] Continue to refer to Figure 5The lower surfaces of the first side portion 32 and the second side portion 33 of the carrier 30 are provided with protective metal sheet mounting grooves 35 at both ends for mounting protective metal sheets 71 and cooperating with the ball bearings 20. The lower surfaces of the first side portion 31 and the second side portion 33 are also provided with lower magnet mounting portions 36 at both ends, which are disposed adjacent to the inner side of the protective metal sheet mounting grooves 35. The lower surfaces of the first side portion 32 and the second side portion 33 are also provided with sensor magnet mounting portions 37, which are disposed between the two lower magnet mounting portions 36 on the same side portion.

[0046] Return to reference 2 and Figure 4 upper circuit board 21 Figure 2 The right edge shown has a side portion 26 that extends downward integrally. This side portion 26 can be covered with ribbon cables to communicate between the upper and lower circuit boards. For this purpose, the outer surface of the second side portion 33 of the carrier 30 has a groove 38 that mates with the side portion 26 of the upper circuit board 21. When installed in place, the side portion 26 of the upper circuit board 21 is accommodated within the groove 38.

[0047] In one embodiment, the first side portion 32 and the second side portion 33 are arranged symmetrically about the lens-bearing portion 31.

[0048] Continue to refer to Figure 3-4 The first side portion 32 and the second side portion 33 extend beyond the lens support portion 31 along the optical axis, thereby forming an I-shaped structure with the first side portion 32 and the second side portion 33 located on both sides of the lens support portion 31.

[0049] In one embodiment, the upper drive portion 20 includes two upper magnets 24, and each of the upper surfaces of the first side portion 32 and the second side portion 33 is provided with an upper magnet mounting groove 34. The upper magnet mounting grooves on the upper surfaces of the first side portion and the upper magnet mounting grooves on the upper surfaces of the second side portion are also symmetrically arranged about the lens bearing portion 31.

[0050] In one embodiment, a protective metal plate mounting groove 35 is provided at each of the four corners of the lower surface of the carrier 30, and a lower magnet mounting part 36 is provided on the inner side of each of the protective metal plate mounting grooves 35. A sensor magnet mounting groove 37 is provided at the middle of the lower surface of the first side part 32 and the second side part 33, and the sensor magnet mounting grooves 37 are symmetrically arranged about the lens bearing part 31.

[0051] Return to reference Figure 3 The thickness of the lens-bearing portion 31 of the carrier 30 is greater than the thickness of the first side portion 32 and the second side portion 33, so that the upper and lower surfaces of the lens-bearing portion 31 protrude upward and downward respectively, so as to cooperate with the frame 23 of the upper drive portion 20 and the base 50.

[0052] Figure 6 This is an exploded view of the lower driving portion according to an embodiment of the present invention. (See diagram below.) Figure 6 As shown, the lower drive section 40 includes a lower circuit board 43, a lower magnet 41, and a lower coil 42. The lower circuit board 43 is disposed on the base 50, and the lower magnet 41 is disposed on the bottom of the carrier 30, specifically within the lower magnet mounting groove 36 of the carrier 30. The lower coil 42 is disposed on the base 50 and cooperates with the lower magnet 41 to drive the carrier 30 to move in a direction perpendicular to the optical axis when the lower coil 42 is energized, thereby achieving the anti-shake function.

[0053] In one embodiment, the lower drive portion 40 further includes a lower metal sheet 44 disposed on the upper surface of the lower magnet 41. When the carrier 30 is mounted on the base 50, the lower metal sheet 44 is disposed between the upper surface of the lower magnet 41 and the lower surface of the carrier 30.

[0054] Return to reference Figure 1 The lens driving device also includes sensors 81 and 82 and a sensor magnet 83. Sensors 81 and 82 are mounted on the base 50 and arranged within the space defined by the lower coil 42. The sensor magnet 83 is fixedly mounted on the bottom of the carrier 30 and corresponds to the positions of sensors 81 and 82. Sensors 81 and 82 are connected to a control module (not shown, such as a mobile phone control module) and detect the displacement of the carrier 30 by detecting the displacement of the sensor magnet 83. This will be described in detail below.

[0055] Return to reference Figure 1 and in conjunction with reference Figure 6 The lower drive section 40 includes four lower magnets 41 and two lower coils 42. The two lower coils 42 are arranged opposite each other on the upper surface of the base 50 (which will be described in detail below). The sensor includes a first sensor 81 and a second sensor 82. The first sensor 81 and the second sensor 82 are respectively disposed in the two lower coils 42. Specifically, in the figure, the first sensor 81 is disposed in the lower coil 42 on the left and the second sensor is disposed in the lower coil 42 on the right. The sensor magnet 83 is disposed between the two magnets 41 on the same side and corresponds to the first sensor 81 and the second sensor 82 respectively. The first sensor 81 and the second sensor 82 detect the displacement of the carrier 30 in the optical axis direction and the direction perpendicular to the optical axis, respectively.

[0056] In actual operation, the first sensor 81 is connected to the control module (not shown, such as a mobile phone control module) and associated with the upper coil 22, thereby enabling the carrier 30 to move along the optical axis and achieve optical zoom. The second sensor 82 is connected to the control module (not shown, such as a mobile phone control module) and associated with the lower coil 42, thereby enabling the carrier 30 to move along a direction perpendicular to the optical axis and achieve image stabilization.

[0057] Figure 7 This is a perspective view of the base 50 according to an embodiment of the present invention. Figure 7 As shown, the base 50 has a rectangular body, and the four corners of the upper surface of the rectangular body are respectively provided with ball bearing mounting grooves 52. A ball bearing 72 is set in each ball bearing mounting groove 52. A metal protective plate 71 is set in each of the four corners of the bottom surface of the carrier 30. When the carrier 30 is installed on the base 50, the metal protective plate 71 is located above the ball bearing 72.

[0058] Return to reference Figure 1 The lens drive device 100 also includes a metal plate 60 embedded in the base. Figure 8 This is a perspective view of a metal sheet 60 embedded in the base according to an embodiment of the present invention. Figure 8 As shown, a metal plate 60 is embedded in the base and disposed on the base 50. Protrusions 61 are provided at the four corners of the embedded metal plate 60, extending into ball bearing mounting grooves 52 on the base 50. Ball bearings 72 are disposed within the ball bearing mounting grooves 52 and located on the protrusions 61. Thus, the bottom of the ball bearing 72 is provided with a metal protrusion 61, and the upper part of the ball bearing 72 is provided with a metal protective plate 71.

[0059] Figure 9 This is an exploded perspective view of the carrier, lower drive section, and base assembly of the lens drive device 100. Figure 10 This is a three-dimensional exploded view of the upper drive part, carrier, lower drive part, base and other components of the lens drive device 100. Figure 11 This is a cross-sectional view of the lens drive unit 100 after assembly.

[0060] like Figure 9-11 As shown, a metal sheet 60 embedded in the base is installed within the base 50. A protruding piece 61 of the embedded metal sheet is accommodated within a ball bearing mounting groove 52 of the base 50. A lower circuit board 43 is installed on the upper surface of the base 50. A lower coil 42 is installed on the base 50. A first sensor 81 is installed within the lower coil 42 on the left side of the diagram, and a second sensor 82 is installed within the lower coil 42 on the right side. Ball bearings 72 are installed within the ball bearing mounting groove 52 and arranged on the upper surface of the protruding piece 61. Four lower magnets 41 are installed in the lower magnet mounting groove 36 on the lower surface of the carrier 30, and lower magnet plates 44 are provided on the upper surface of the lower magnets 41 to strengthen the magnetic field. Sensor magnets 84 are installed in the sensor magnet mounting groove 37 on the lower surface of the carrier 30. Optionally, sensor magnet plates can be provided on the upper surface of the sensor magnets 84 to further strengthen the magnetic field.

[0061] The metal protective sheet 71 is installed in the metal protective sheet mounting groove 35 on the lower surface of the carrier 30. Then the carrier 30 is installed on the base 50, with the two lower magnets 41 on the left side located on the coil 42 on the left side, and the two lower magnets 41 on the right side located on the lower coil 42 on the right side. The sensor magnet 84 on the left side is located above the first sensor 81, and the sensor magnet 84 on the right side is located above the second sensor 82.

[0062] The upper magnet 24 is installed in the upper magnet mounting groove 34 of the carrier 30, and optionally an upper magnet sheet 25 is placed on the lower surface of the upper magnet 24. The upper circuit board 21 is installed on the frame 23, and the upper coil 22 is installed at the bottom of the upper circuit board 21 and defined by the frame 23. The frame 23 and the upper circuit board 21 are installed on the carrier 30. The upper coil 22 is located above the upper magnet 24. The side portion 26 of the upper circuit board 21 is received in the side groove 38 of the carrier 30. The bent portion 27 of the side portion 26 is fitted into the notch 431 of the lower circuit board 43 and is located on the base 50. Finally, the housing 10 encapsulates all the components from top to bottom in the space defined by the housing 10 and the base 50.

[0063] In one embodiment, the periscope lens driving device 100 described above can be used in a mobile phone to drive the mobile phone camera. Both the first sensor 81 and the second sensor 82 are signal-connected to the mobile phone control module. The upper circuit board 21 is connected to the upper coil 22 and to the mobile phone power supply, and the lower circuit board 43 is electrically connected to the lower coil 42 and to the mobile phone power supply. Specifically, the first sensor 81 is associated with the upper coil 22 and detects the displacement of the carrier 30 along the optical axis, transmitting this information to the control module. The control module controls the current flow within the upper coil 22, thereby driving the carrier 30 to move along the optical axis, achieving optical zoom. The second sensor 82 is associated with the lower coil 42 and detects the position of the carrier 30 in a direction perpendicular to the optical axis, transmitting this information to the control module. The control module controls the current flow within the lower coil 42, thereby driving the carrier to move in a direction perpendicular to the optical axis, achieving image stabilization.

[0064] During this process, since the carrier 30 is mounted on the ball 72, and the ball 72 is provided with a metal protective plate 71 and a protruding plate 61 at the bottom and top respectively, the carrier 30 drives the ball 72 to roll when it moves, which makes the movement reliability of the carrier 30 stronger and the structure more compact and robust.

[0065] In summary, the periscope lens driving device 100 of this application controls the movement along the optical axis and perpendicular to the optical axis through two independent modules on upper and lower circuit boards. It also employs a combination of ball bearings and protective metal sheets for support and structural reinforcement, and has corresponding independent sensors for detection and control along both the optical axis and perpendicular to it. This results in a simple structure, reducing the number of required components and significantly enhancing reliability.

[0066] The preferred embodiments of the present invention 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 the present invention. These equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A periscopic lens mechanism characterized by comprising: The periscope lens mechanism comprises a prism part and a lens driving device, and the prism part is arranged at the front end of the lens driving device; The lens driving device comprises a shell, a carrier, a lower driving part, a base, balls and a protective sheet; The carrier is used for mounting the lens; The lower driving part is arranged below the carrier; The balls and the protective sheet are arranged between the carrier and the base; The carrier, the lower driving part, the balls and the protective sheet are encapsulated in the space defined by the base and the shell; The base is provided with a ball mounting groove; The lens driving device further comprises a base-embedded metal sheet, which is arranged on the base and provided with a protruding sheet, the balls are arranged in the ball mounting groove and located on the protruding sheet; The carrier is provided with a protective sheet mounting groove, which is provided with a metal protective sheet located above the balls; the periscope lens mechanism further comprises an upper driving part, which comprises a frame, an upper circuit board, an upper coil and an upper magnet, the upper circuit board is arranged above the frame, the upper magnet is arranged on the upper surface of the carrier, and the upper coil is arranged at the bottom of the upper circuit board.

2. The periscopic lens mechanism according to claim 1, characterized by The upper driving part further comprises an upper metal sheet arranged between the lower surface of the upper magnet and the upper surface of the carrier.

3. The periscopic lens mechanism according to claim 1, characterized by The lower driving part comprises a lower circuit board, a lower magnet and a lower coil, the lower circuit board is arranged on the base, the lower magnet is arranged at the bottom of the carrier, and the lower coil is arranged on the base.

4. The periscopic lens mechanism according to claim 3, characterized by The lower driving part further comprises a lower metal sheet arranged between the upper surface of the lower magnet and the lower surface of the carrier.

5. The periscopic lens mechanism according to claim 3, characterized by The lens driving device further comprises a sensor and a sensor magnet, the sensor is arranged in the space defined by the lower coil, the sensor magnet is fixedly arranged at the bottom of the carrier and corresponds to the sensor, the sensor is connected with a control module and detects the displacement of the carrier by detecting the displacement of the sensor magnet.

6. The periscopic lens mechanism according to claim 5, characterized by The lower driving part comprises four lower magnets and two lower coils, the two lower coils are arranged opposite on the upper surface of the base, the sensor comprises a first sensor and a second sensor, the first sensor and the second sensor are arranged in the two coils respectively, the sensor magnet is arranged between the two lower magnets on the same side and corresponds to the first sensor and the second sensor respectively, and the first sensor and the second sensor detect the displacement of the carrier in the optical axis direction and the displacement perpendicular to the optical axis direction respectively.

Images