A continuous optical variable device for lens motor

Abstract

The present invention relates to the field of optical lens zoom technology, specifically a continuous optical variable device for a lens motor, comprising a base; an optical fixed component and an image sensor arranged on both sides of the base; a first carrier arranged on the base, used to carry a first optical movable component; a second carrier arranged on one side of the first carrier, used to carry a second optical movable component; the first carrier is connected to a first driving mechanism, and the first driving mechanism drives the first carrier to move in a first axial direction, thereby driving the first optical movable component and the second optical movable component to move synchronously in the first axial direction relative to the optical fixed component; the second carrier is connected to a second driving mechanism, and the second driving mechanism drives the second carrier to move in the first axial direction, thereby driving the second optical movable component to move in the first axial direction relative to the first optical movable component and the optical fixed component. The present invention can realize the long-stroke movement of the lens group and meet the requirements of optical zoom and focus.

Description

Technical Field

[0001] The present invention relates to the technical field of optical lens zooming, and in particular to a continuous optical zooming device for a lens motor. Background Art

[0002] The lenses used in mobile phones are gradually adding optical zoom technology to realize the function of telephoto lenses. Among them, the telephoto lens is longer than the general traditional wide-angle lens. If the current mobile phone lens is placed vertically, the mobile phone lens will protrude a lot from the shell surface, resulting in inconsistent appearance and easy to cause damage to the camera. Summary of the invention

[0003] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a continuous optical zoom device for a lens motor, which solves the technical problem that the long-stroke movement of the lens group required for optical zooming leads to a decrease in driving force.

[0004] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0005] The present invention provides a continuous optical variable device for a lens motor, comprising: a base; an optical fixed component arranged on one side of the base; a first carrier arranged on the base, used to carry a first optically movable component; a second carrier arranged at one end of the first carrier, used to carry a second optically movable component; the first carrier is connected to a first driving mechanism, and the first driving mechanism drives the first carrier to move in a first axial direction, thereby driving the first optically movable component and the second optically movable component to move synchronously in the first axial direction relative to the optically fixed component, so as to achieve an optical zoom effect; the second carrier is connected to a second driving mechanism, and the second driving mechanism drives the second carrier to move in the first axial direction, thereby driving the second optically movable component to move in the first axial direction relative to the first optically movable component and the optically fixed component, so as to achieve an optical focusing effect.

[0006] Furthermore, a U-shaped groove is provided on one side of the first carrier, both ends of the U-shaped groove are through holes, and the opening of the U-shaped groove faces downward, and a first driving mechanism is arranged in the U-shaped groove.

[0007] Furthermore, the first driving mechanism includes a first driving coil assembly, a first driving magnet assembly and a first position sensor; one end of the first driving coil assembly is connected to the inner wall of the base, the first driving magnet assembly is connected to the first carrier, and the first driving magnet assembly is arranged on both sides of the first driving coil assembly; the first position sensor is arranged below the base for sensing the position of the first driving magnet assembly; by sensing the position of the first driving magnet assembly, the first driving coil assembly is energized to drive the first carrier to move.

[0008] Furthermore, the first driving coil assembly includes a coil base, a magnetically insulating component, and at least three driving coils closely arranged along the first axis. The magnetically insulating component is arranged on the inner side of the driving coil, and the driving coil is sleeved on the coil base.

[0009] Furthermore, it also includes a controller, which is connected to the first position sensor. The controller is also connected to an image sensor arranged on the other side of the base. The first position sensor transmits the sensed position signal of the first carrier to the controller, and the controller controls the switching of the current switch on the drive coil corresponding to the position of the first drive magnet assembly through the image signal sent by the image sensor.

[0010] Furthermore, the current switches of the drive coils are switched step by step for adjacent drive coils.

[0011] Furthermore, the first driving magnet assembly includes a first side driving magnet and a second side driving magnet, and the first side driving magnet and the second side driving magnet are fixed on both sides of the U-shaped groove at the other end of the first carrier; the first side driving magnet and the second side driving magnet are respectively arranged corresponding to the two straight sides of the driving coil of the first driving coil assembly, and the magnetic poles of the first side driving magnet and the second side driving magnet on opposite sides have opposite polarities.

[0012] Furthermore, the second driving mechanism includes a second driving coil assembly, a second driving magnet assembly and a second position sensor; the second driving coil assembly is arranged on the first carrier, the second driving magnet assembly is arranged on the second carrier, and the second driving magnet assembly and the second driving coil assembly are arranged correspondingly in position; the second position sensor is arranged on the first carrier, for sensing the position of the second driving magnet assembly; through the sensed position of the second driving magnet assembly, the second driving coil assembly is energized to drive the second carrier to move.

[0013] Furthermore, it also includes a controller, which is connected to the second position sensor. The controller is also connected to an image sensor arranged on the other side of the base. The second position sensor transmits the sensed position signal of the second carrier to the controller, and the controller then controls the opening and closing of the current switch of the second drive coil assembly corresponding to the position of the second drive magnet assembly through the image signal sent by the image sensor.

[0014] Furthermore, a bearing is arranged on the base along the first axial direction, and a pre-attraction magnet is arranged on the upper part of one side where the first carrier is connected to the bearing, so that the first carrier is arranged in close contact with the bearing.

[0015] The beneficial effects of the present invention are as follows: the continuous optical variable device for a lens motor of the present invention realizes long-stroke movement of the lens group by adopting a driving coil relay method, thereby meeting the requirements of optical zoom and focus. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a continuous optical variable device for a lens motor of the present invention;

[0017] Figure 2 It is an exploded schematic diagram of a continuous optical variable device for a lens motor of the present invention;

[0018] Figure 3 It is a schematic diagram of the structure of the first carrier and the second carrier of the present invention;

[0019] Figure 4 It is a cross-sectional schematic diagram of the first driving coil assembly and the first driving magnet assembly of the present invention;

[0020] Figure 5 It is a top view schematic diagram of the first driving coil assembly and the first driving magnet assembly of the present invention.

[0021] In the figure: 1, optical fixing component; 2, first optical movable component; 3, second optical movable component; 4, second driving coil component; 5, second driving magnet component; 6, first carrier; 61, first ball groove; 62, first receiving groove; 7, second carrier; 71, second ball groove; 72, second receiving groove; 8, pre-attraction magnet; 9, first driving magnet component; 9a, first side driving magnet; 9b, second side driving magnet; 10, first driving coil component; 101, coil base; 102, driving coil; 1021, first straight edge; 1022, second straight edge; 102a, first coil; 102b, second coil; 102c, third coil; 102d, fourth coil; 102e, fifth coil; 103, magnetic insulation component; 11, bearing; 12, base; 13, image sensor. DETAILED DESCRIPTION

[0022] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below in conjunction with the accompanying drawings through specific implementation methods. Figure 1 As shown, the present invention defines X, Y, and Z axes. In a specific embodiment, the X axis is the optical axis zoom and focus direction; the Y axis is perpendicular to the X axis; and the Z axis is perpendicular to the X and Y axes.

[0023] To achieve reverse playback, the lens motor can be translated along the X-axis to achieve optical zoom and optical focus functions. The present invention divides the lenses into different groups. The first group is a fixed group (i.e., an optically fixed component), and the second and third groups are movable groups (i.e., a first optically movable component and a second optically movable component). The second and third groups move simultaneously to achieve the optical zoom function; only the third group moves to achieve the optical focus function. The optical zoom and focus functions are satisfied by controlling the positions of the second and third group lenses.

[0024] Embodiment 1:

[0025] Reference Figure 1 and Figure 2 The present invention provides a continuous optical variable device for a lens motor. The device comprises: an optical fixed component 1, a first optical active component 2, a second optical active component 3, a first carrier 6, a second carrier 7, and a base 12. The optical fixed component 1 is arranged on one side of the base 12, and an image sensor 13 is arranged on the other side of the base 12. The first carrier 6 is arranged on the base 12, and is used to carry the first optical active component 2. The second carrier 7 is arranged at one end of the first carrier 6, and is used to carry the second optical active component 3. The first carrier 6 is connected to a first driving mechanism, and the first driving mechanism drives the first carrier 6 to move in the X-axis direction, thereby driving the first optical active component 2 and the second optical active component 3 to move synchronously in the X-axis direction relative to the optical fixed component 1, so as to achieve an optical zoom effect. The second carrier 7 is connected to a second driving mechanism, and the second driving mechanism drives the second carrier 7 to move in the X-axis direction, thereby driving the second optical active component 3 to move independently in the X-axis direction relative to the first optical active component 2 and the optical fixed component 1, so as to achieve an optical focusing effect.

[0026] Specifically, the interior of the optical fixed component 1 is composed of more than one lens, the interior of the first optical movable component 2 is composed of more than one lens, and the interior of the second optical movable component 3 is composed of more than one lens.

[0027] Specifically, the base 12 is a cavity with two openings at the optical light entrance and light exit. A receiving groove is provided at the light entrance opening for placing the optical fixing component 1. A receiving groove is provided at the light exit opening for placing the image sensor 13. A bearing 11 is placed in the cavity along the X-axis direction. In this embodiment, the bearing 11 is made of metal and has high paramagnetism.

[0028] Specifically, a first receiving groove 62 is provided on the first carrier 6 in the X-axis direction, in which the first optical active component 2 can be placed. Pre-attractive magnets 8 are placed on both sides of the first carrier 6. The fixed magnetic field generated by the pre-attractive magnets 8 and the high paramagnetic properties of the bearing 11 can firmly and securely adhere the first carrier 6 to the bearing 11, and with the corresponding contact features, the first carrier 6 can perform limited movement in the X-axis direction. The first carrier 6 is provided with a U-shaped groove on one side of the first receiving groove 62, and the two sides of the U-shaped groove are through holes and the opening of the U-shaped groove is arranged downward. The first driving magnet assembly 9 of the first driving mechanism is placed on both sides of the U-shaped groove, one side of the U-shaped groove is the first side driving magnet 9a of the first driving magnet assembly 9, and the other side facing the direction is the second side driving magnet 9b of the first driving magnet assembly 9, and the magnetic poles of the opposite surfaces of the two magnets are opposite. The first driving coil assembly 10 of the first driving mechanism is placed in the middle of the U-shaped groove.

[0029] Specifically, the second carrier 7 is provided with a second receiving groove 72 in the X-axis direction, in which the second optical movable component 3 can be placed. In this embodiment, since the second carrier 7 is mounted on the first carrier 6, the second carrier 7 will move together when the first carrier 6 is displaced, and the second carrier 7 can move together with the first carrier 6 or independently. Therefore, when the first carrier 6 drives the second carrier 7 to move together, the optical path passes through the optical fixing component 1 to cooperate with the first optical movable component 2 and the second optical movable component 3 to achieve an optical zoom effect. When the second carrier 7 moves alone, the optical paths of the optical fixing component 1 and the first optical movable component 2 do not change, and the optical path of the second optical movable component 3 is adjusted to achieve the function of optical focusing.

[0030] Specifically, the first driving mechanism includes a first driving coil assembly 10, a first driving magnet assembly 9, a first position sensor and a controller. One end of the first driving coil assembly 10 is connected to the inner wall of the base 12, the first driving magnet assembly 9 is fixedly connected to the first carrier 6, and the first driving magnet assembly 9 is arranged on both sides of the first driving coil assembly 10. The first position sensor is arranged below the base 12, and is used to sense the position of the first driving magnet assembly 9. The controller is connected to the first position sensor and the image sensor 13 respectively, the first position sensor transmits the sensed position information of the first driving magnet assembly 9 to the controller, and the image sensor 13 also transmits the image signal to the controller, and then the controller determines in which direction the first driving magnet assembly 9 should move, and finally controls the first driving coil assembly 10 to be energized, and the fixed magnetic field generated by the first driving magnet assembly 9 is applied to the first driving coil assembly 10, so that the first driving coil assembly 10 generates a driving force to drive the first carrier 6 to move. Among them, the first driving coil assembly 10 includes a coil base 101, a magnetic insulation component 103, and at least three driving coils 102 arranged closely along the X-axis direction. The magnetic-insulating component 103 is arranged on the inner side of the driving coil 102, and the driving coil 102 is sleeved on the coil base 101. The first driving magnet assembly 9 includes a first side driving magnet 9a and a second side driving magnet 9b. The first side driving magnet 9a and the second side driving magnet 9b are respectively fixed on both sides of the U-shaped groove at the other end of the first carrier 6, and the first driving coil assembly 10 is arranged in the middle of the U-shaped groove. The first side driving magnet 9a and the second side driving magnet 9b are respectively arranged corresponding to the two straight sides of the driving coil 102 of the first driving coil assembly 10, and the magnetic poles of the first side driving magnet 9a and the second side driving magnet 9b on the opposite side have opposite polarities.

[0031] The first drive coil assembly 10 is arranged on one side of the cavity. In this embodiment, the first drive coil assembly 10 is composed of five drive coils 102 stacked closely together, namely the first coil 102a, the second coil 102b, the third coil 102c, the fourth coil 102d, and the fifth coil 102e. The five drive coils 102 are all placed on the coil stand 101, and a magnetic-isolating component 103 is arranged in the middle of the coil stand 101. The magnetic-isolating component 103 in this embodiment is a yoke. When there is a corresponding first-side drive magnet 9a on the outside to generate a fixed magnetic field on the first straight edge 1021 of the drive coil 102, the yoke in the middle can generate a magnetic-isolating function to prevent the fixed magnetic field from passing through the first straight edge 1021 to reach the second straight edge 1022, resulting in a reverse driving force, thereby preventing the fixed magnetic field from passing through the first straight edge 1021 and the second straight edge 1022 to simultaneously generate driving forces in different directions, which leads to the problem of a decrease in driving force.

[0032] Among them, the first coil 102a, the second coil 102b, the third coil 102c, the fourth coil 102d, and the fifth coil 102e are connected in parallel with each other and can be independently powered and controlled. In cooperation with the first position sensor at the bottom of the base 12, the moving position of the first carrier 6 can be sensed, and the coil current within the range of action of the fixed magnetic field generated by the first driving magnet assembly 9 can be independently given by the controller, so that the maximum driving force can be generated to move the first carrier 6 under the limited current power consumption limit. The first position sensor switches the current switch on the driving coil 102 corresponding to the position of the first driving magnet assembly 9 through the controller through the position of the first carrier 6 sensed by the first position sensor. The current switch of the driving coil 102 is switched to the adjacent driving coil 102 step by step.

[0033] Specifically, in this embodiment, the width of the first driving magnet assembly 9 is slightly larger than the width of any one of the driving coils 102 in the first driving coil assembly 10. The moving position of the first carrier 6 sensed by the first position sensor can be used to infer the range of the first driving magnet assembly 9 corresponding to the first driving coil assembly 10, and the driving coils 102 within the range can be activated to avoid unnecessary current loss. For example, after the first carrier 6 is displaced to a certain position, the width range of its first driving magnet assembly 9 falls between the second coil 102b and the third coil 102c. At this time, current is given to the second coil 102b and the third coil 102c to generate a driving force. The first coil 102a, the fourth coil 102d, and the fifth coil 102e are not given current at this time. In this way, the fixed magnetic field generated by the first driving magnet assembly 9 can be efficiently applied to the required driving coil 102 to generate a driving force. Since the first carrier 6 only moves along the X-axis direction, the switching order of the driving coils 102 is continuous for adjacent coils. For example, if the first driving magnet assembly 9 is currently located on both sides of the fifth coil 102e and moves in the positive X-axis direction, the fourth coil 102d and the fifth coil 102e are driven first. When the first driving magnet assembly 9 moves to the fourth coil 102d, the fourth coil 102d and the third coil 102c are driven, and so on. If the first driving magnet assembly 9 is currently located on both sides of the first coil 102a and moves in the negative X-axis direction, the first coil 102a and the second coil 102b are driven first. When the first driving magnet assembly 9 moves to the second coil 102b, the second coil 102b and the third coil 102c are driven. The driving coil 102 will continue to drive the adjacent coils, and there will be no random driving or interval driving.

[0034] Specifically, the second driving mechanism includes a second driving coil assembly 4, a second driving magnet assembly 5 and a second position sensor. The second driving coil assembly 4 is arranged on the first carrier 6, the second driving magnet assembly 5 is arranged on the second carrier 7, and the second driving magnet assembly 5 is arranged corresponding to the position of the second driving coil assembly 4. The second position sensor is arranged on the first carrier 6, and is used to sense the position of the second carrier 7. It also includes a controller, which is respectively connected to the second position sensor and the image sensor 13. The second position sensor transmits the sensed position information of the second driving magnet assembly 5 to the controller, and the image sensor 13 also transmits the image signal to the controller. Then the controller determines in which direction the second driving magnet assembly 5 should move, and finally controls the second driving coil assembly 4 to be energized, and the fixed magnetic field generated by the second driving magnet assembly 5 is applied to the second driving coil assembly 4, so that the second driving coil assembly 4 generates a driving force to drive the second carrier 7 to move. Specifically, refer to Figure 2 and Figure 3, a first ball groove 61 is provided at the connection between the first carrier 6 and the second carrier 7, and a second ball groove 71 is provided on the second carrier 7 corresponding to the position of the first ball groove 61. A plurality of balls can be arranged between the first ball groove 61 in the first carrier 6 and the second ball groove 71 in the second carrier 7. When the second carrier 7 applies a magnetic pre-attraction force or generates a pre-pressure toward the first carrier 6 by using a spring sheet configuration, the second carrier 7 can be stably and securely contacted with the balls. The shapes and sizes of the first ball groove 61 and the second ball groove 71 are matched, so that the second carrier 7 can perform limited movement along the X-axis direction on the first carrier 6. A second driving coil assembly 4 is provided on the first carrier 6, and a second driving magnet assembly 5 is provided at a corresponding position thereof and placed on the second carrier 7. When the control module drives the second driving coil assembly 4, the fixed magnetic field generated by the second driving magnet assembly 5 can generate a driving force by Lawrence's law, so that the second carrier 7 is independently displaced relative to the first carrier 6.

[0035] The working principle of the present invention is: more than three driving coils cooperate with current switches to enable the first carrier to maintain maximum driving force and use current with optimal efficiency during the movement process, so as to achieve long-stroke movement without the problem of edge driving force reduction caused by distance changes, thereby achieving fast optical zoom and optical focus functions.

[0036] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A continuous optical variable device for a lens motor, characterized in that: include: Base (12); An optical fixing component (1) arranged on one side of a base (12); A first carrier (6) disposed on a base (12) and used for carrying a first optically active component (2); A second carrier (7) disposed at one end of the first carrier (6) and used for carrying the second optically active component (3); The first carrier (6) is connected to the first driving mechanism, and the first driving mechanism drives the first carrier (6) to move in a first axial direction, thereby driving the first optical movable component (2) and the second optical movable component (3) to move synchronously in the first axial direction relative to the optical fixed component (1), so as to achieve an optical zoom effect; The second carrier (7) is connected to the second driving mechanism, and the second driving mechanism drives the second carrier (7) to move in the first axial direction, thereby driving the second optical movable component (3) to move in the first axial direction relative to the first optical movable component (2) and the optical fixed component (1), so as to achieve an optical focusing effect; A U-shaped groove is provided on one side of the first carrier (6), both ends of the U-shaped groove are through holes, and the opening of the U-shaped groove faces downward, and a first driving mechanism is arranged in the U-shaped groove; The first driving mechanism comprises a first driving coil assembly (10), a first driving magnet assembly (9) and a first position sensor; One end of the first driving coil component (10) is connected to the inner wall of the base (12), the first driving magnet component (9) is connected to the first carrier (6), and the first driving magnet component (9) is arranged on both sides of the first driving coil component (10); the first position sensor is arranged below the base (12) and is used to sense the position of the first driving magnet component (9); and the first driving coil component (10) is energized by the sensed position of the first driving magnet component (9) to drive the first carrier (6) to move.

2. The continuous optical variable speed device for a lens motor according to claim 1, characterized in that: The first driving coil assembly (10) comprises a coil base (101), a magnetically insulating component (103), and at least three driving coils (102) closely arranged along a first axial direction, wherein the magnetically insulating component (103) is arranged on the inner side of the driving coil (102), and the driving coil (102) is sleeved on the coil base (101).

3. The continuous optical variable speed device for a lens motor according to claim 1, characterized in that: The device also includes a controller, which is connected to the first position sensor. The controller is also connected to an image sensor (13) arranged on the other side of the base (12). The first position sensor transmits a position signal of the sensed first carrier (6) to the controller. The controller then controls the switching of a current switch on a drive coil (102) corresponding to the position of the first drive magnet assembly (9) through the image signal sent by the image sensor (13).

4. The continuous optical variable speed device for a lens motor according to claim 3, characterized in that: The current switch of the driving coil (102) is switched step by step between adjacent driving coils (102).

5. The continuous optical variable speed device for a lens motor according to claim 1, characterized in that: The first driving magnet assembly (9) comprises a first side driving magnet (9a) and a second side driving magnet (9b), wherein the first side driving magnet (9a) and the second side driving magnet (9b) are fixed on both sides of the U-shaped groove at the other end of the first carrier (6); the first side driving magnet (9a) and the second side driving magnet (9b) are respectively arranged corresponding to the two straight sides of the driving coil (102) of the first driving coil assembly (10), and the magnetic poles of the first side driving magnet (9a) and the second side driving magnet (9b) on the opposite sides have opposite polarities.

6. The continuous optical variable speed device for a lens motor according to claim 1, characterized in that: The second driving mechanism comprises a second driving coil assembly (4), a second driving magnet assembly (5) and a second position sensor; The second drive coil component (4) is arranged on the first carrier (6), the second drive magnet component (5) is arranged on the second carrier (7), and the second drive magnet component (5) and the second drive coil component (4) are arranged correspondingly in position; the second position sensor is arranged on the first carrier (6) and is used to sense the position of the second drive magnet component (5); and the second drive coil component (4) is energized by the sensed position of the second drive magnet component (5) to drive the second carrier (7) to move.

7. The continuous optical variable speed device for a lens motor according to claim 6, characterized in that: The device also includes a controller, which is connected to a second position sensor. The controller is also connected to an image sensor (13) arranged on the other side of the base (12). The second position sensor transmits a position signal of the sensed second carrier (7) to the controller. The controller then controls the opening and closing of a current switch of a second drive coil assembly (4) corresponding to the position of the second drive magnet assembly (5) through the image signal sent by the image sensor (13).

8. The continuous optical variable speed device for a lens motor according to claim 1, characterized in that: A bearing (11) is arranged on the base (12) along the first axial direction, and a pre-attracting magnet (8) is arranged on the upper part of the side where the first carrier (6) is connected to the bearing (11), so that the first carrier (6) and the bearing (11) are arranged in close contact.

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