Lens aperture adjusting device

Abstract

The utility model discloses a lens aperture adjusting device, which comprises a base, a first receiving polar plate, a second receiving polar plate, an emitting polar plate, a movable seat and a metal sheet, and the first receiving polar plate is connected with the base. And the second receiving pole plate and the first receiving pole plate are arranged along the circumferential direction of the base and are connected with the base. The transmitting polar plate, the first receiving polar plate and the second receiving polar plate are arranged along the radial direction and are connected with the base, and the transmitting polar plate, the first receiving polar plate and the second receiving polar plate respectively form a capacitor structure. And the movable seat is rotatably connected to the base. The metal sheet is connected with the movable seat, and the projection of the metal sheet in the vertical direction is overlapped with at least one part of the projection of the transmitting polar plate in the vertical direction, and at least one part of the projection of the first receiving polar plate in the vertical direction is overlapped with at least one part of the projection of the second receiving polar plate in the vertical direction.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical element drive technical field, especially relate to a lens aperture adjusting device. BACKGROUND

[0002] For camera aperture, in the place where light is strong, the camera can obtain deeper depth of field and sharper picture through reducing aperture, and in the place where light is insufficient, through increasing aperture can increase light quantity, so that can obtain higher exposure, lower noise and pure picture. The existing aperture adjusting device cannot accurately adjust the size and needs to be improved. SUMMARY

[0003] The utility model discloses a lens aperture adjusting device to solve the prior art problems.

[0004] To solve the above technical problem, the embodiment of the utility model provides a lens aperture adjusting device, comprising:

[0005] Base;

[0006] First receiving pole, first receiving pole with the base is connected;

[0007] Second receiving pole, the second receiving pole is arranged along the circumference of the base with the first receiving pole and is connected with the base;

[0008] Emitting pole, the emitting pole, the first receiving pole and the second receiving pole are arranged along the radial direction and are connected with the base, and the emitting pole forms a capacitor structure with the first receiving pole and the second receiving pole respectively;

[0009] Movable seat, movable seat rotatable connection to the base connection;

[0010] Metal sheet, the metal sheet is connected with the movable seat, and the projection of the metal sheet along the vertical direction and the projection of the emitting pole along the vertical direction at least one part, the projection of the first receiving pole along the vertical direction at least one part and the projection of the second receiving pole along the vertical direction at least one part overlap.

[0011] In an embodiment, the emitting pole is an arc-shaped plate extending along the circumference of the base and located radially outside the first receiving pole and the second receiving pole;

[0012] The projection of the radial outside of the metal sheet along the vertical direction and the projection of the emitting pole along the vertical direction at least one part overlap, and the projection of the radial inside along the vertical direction and the projection of the first receiving pole and the second receiving pole along the vertical direction at least one part overlap.

[0013] In one embodiment, the radially outer side of the first receiving electrode plate and the second receiving electrode plate is a curved surface.

[0014] In one embodiment, the radially inner side of the first receiving electrode plate and the second receiving electrode plate is a flat surface.

[0015] In one embodiment, the first receiving electrode plate and the second receiving electrode plate are rectangular plates.

[0016] In one embodiment, the first receiving electrode plate and the second receiving electrode plate are of the same shape.

[0017] In one embodiment, the emitter plate, the first receiving electrode plate and the second receiving electrode plate are located on the top surface of the base;

[0018] The metal sheet is located on the bottom surface of the movable seat.

[0019] In one embodiment, the lens aperture adjusting device further comprises:

[0020] a top cover, the edge of which is fixedly connected with the edge of the base and forms a containing space;

[0021] a plurality of blades, which are arranged in a ring shape on the movable seat and are respectively connected with the base and the movable seat;

[0022] The movable seat is provided with a magnet group, and the base is provided with a coil group, which cooperates with the magnet group to drive the movable seat to rotate.

[0023] In one embodiment, the movable seat and the base are in rolling connection.

[0024] In one embodiment, one of the base and the movable seat is provided with a magnetic member, and the other is provided with a metal member which is attracted to the magnetic member. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 、 Figure 2 and Figure 3 are respectively the exploded view of the lens aperture adjusting device of one embodiment of the utility model.

[0026] Figure 4 is Figure 2 the perspective view of the plurality of blades in the embodiment shown.

[0027] Figure 5 is Figure 2 the perspective view of the base in the embodiment shown.

[0028] Figure 6It is the perspective view of the emitter plate, the first receiving plate, the second receiving plate, the magnetic piece and the metal piece of an embodiment of the utility model.

[0029] Figure 7 Figure 2 It is the explosion view of the base, the circuit board, the magnet group and the metal sheet in the embodiment shown.

[0030] Figure 8 It is the explosion view of the emitter plate, the first receiving plate, the second receiving plate and the metal sheet of an embodiment of the utility model.

[0031] Figure 9 It is Figure 1 It is the assembly view of the lens aperture adjusting device in the embodiment shown.

[0032] Figure 10 It is Figure 9 It is the sectional view of the lens aperture adjusting device along A-A line in the embodiment shown.

[0033] Figure 11 And Figure 12 It is the schematic view of the emitter plate, the first receiving plate, the second receiving plate and the metal sheet of another embodiment of the utility model.

[0034] Fig. 10, lens aperture adjusting device; 1, base; 11, bottom plate; 12, fixed protrusion; 13, support protrusion; 14, fixed pin shaft; 15, ball; 16, emitter plate; 17, first receiving plate; 18, second receiving plate; 2, movable seat; 21, movable pin shaft; 3, blade; 31, fixed pin hole; 32, movable pin hole; 33, metal sheet; 34, magnet group; 4, top cover; 5, light absorbing sheet; 6, circuit board; 7, metal piece; DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will be combined with the drawings to the each embodiment of the utility model detailedly. However, the ordinary skilled in the art can understand that in each embodiment of the utility model, in order to make the reader better understand the application and proposed many technical details. However, even without these technical details and based on the various changes and modifications of each embodiment, the technical scheme claimed by each claim of the application can be realized.

[0036] Unless the context requires otherwise, the word "comprise", and variations such as "comprising" and "comprises" will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers.

[0037] The embodiments of the present application will be described in detail below with reference to the drawings, so that the purpose, characteristics and advantages of the present application can be more clearly understood. It should be understood that the embodiments shown in the drawings are not a limitation on the scope of the present application, but only to illustrate the essential spirit of the technical scheme of the present application.

[0038] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrase "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0039] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. It should be noted that the term "comprising" typically is used herein to mean "including at least the recited elements," and that no other elements are necessarily excluded.

[0040] In the following description, in order to clearly show the structure and working mode of the present application, many directional words will be used for description, but the words of "front", "back", "left", "right", "outer", "inner", "outward", "inward", "up", "down" and the like should be understood as convenient language, and should not be understood as limiting words.

[0041] The utility model relates to a kind of lens aperture adjusting device 10, the lens aperture adjusting device 10 includes base 1, movable seat 2, first receiving plate 17, second receiving plate 18, emitter plate 16, multiple blades 3, metal sheet 33 and top cover 4.

[0042] Base 1 includes bottom plate 11 and multiple fixed protrusions 12 located at the top surface edge of bottom plate 11, the top end of fixed protrusion 12 is provided with mounting shaft and is fixedly connected with the mounting groove on top cover 4, after being connected, it forms a movable space, movable seat 2 is arranged in the movable space and can rotate in the movable space.

[0043] The center positions of base 1, movable seat 2 and top cover 4 correspond to the lens on lens motor. Multiple blades 3 are arranged above base 1 and movable seat 2, and also located in the movable space. Multiple shielding blades 3 are connected with base 1 and movable seat 2, multiple shielding blades 3 are arranged in annular shape and adjacent shielding blades 3 are staggered and superposed, when movable seat 2 rotates, multiple shielding blades 3 rotate, so as to realize the shielding of lens and the adjustment operation of lens aperture.

[0044] The plurality of blades 3 are provided with fixed pin holes 31 and movable pin holes 32, and the top surface of the base 1 is provided with a support protrusion 13, the top surface of the support protrusion 13 is provided with a fixed pin shaft 14 and is connected with the fixed pin holes 31 on the blades 3 through the fixed pin shaft 14.

[0045] The top end of the movable seat 2 is provided with a movable pin shaft 21 and is connected with the movable pin holes 32 on the blades 3 through the movable pin shaft 21, when the movable seat 2 rotates, the movable pin shaft 21 drives the blades 3 to rotate around the fixed pin shaft 14, so that the range of the aperture hole formed by the plurality of blades 3 changes.

[0046] The top end of the support protrusion 13 and the blades 3 are provided with light-absorbing sheets 5 with light-absorbing effect, which can limit the maximum aperture hole range and avoid excessive light entering the lens, improving the aperture adjustment effect.

[0047] The bottom end of the movable seat 2 is provided with a magnet slot and is installed with a magnet group 34, and the lower side of the movable seat 2 is provided with a circuit board 6, which is located on the top surface of the bottom plate of the base, and is provided with a coil group, which is powered by the circuit board 6, and the coil group corresponds to the magnet group 34 and drives the movable seat 2 to rotate under the cooperation of the two. In some embodiments, the coil group can also be directly arranged on the base 1.

[0048] The fixed protrusions 12 at the edges of the base 1 are provided with four, the inner side of the fixed protrusions 12 is provided with a stepped structure that gradually rises from the inner side to the outer side, and the inner side of two fixed protrusions 12 on one side is provided with a ball 15, which is arranged in a groove on the stepped structure, and the movable seat 2 is connected with the base 1 through the ball 15. The inner side of the other two fixed protrusions 12 is not provided with a ball 15. Because the setting of the ball 15 on one side will cause the other side to have a larger friction, therefore, a magnetic member and a metal member 7 attracted to the magnetic member are set to avoid this situation.

[0049] Specifically, a side adsorption installation slot provided with the metal member 7 is arranged on one side of the support protrusion 13 of the base 1, and a magnetic member is arranged in the side of the movable seat 2, an adsorption force is generated between the magnetic member and the metal member 7, the movable seat 2 is close to the ball 15 under the action of the adsorption force, and finally the movable seat 2 is in abutment with the side wall of the ball 15. At the same time, an installation slot provided with another magnetic member is arranged at the bottom of the base 1, and another metal member 7 is arranged at the bottom end of the movable seat 2, and an adsorption force generated between the metal member 7 and the magnetic member causes the movable seat 2 to move downward and abut on the ball 15. Of course, the magnetic member and the metal member 7 can be installed reversely, the magnetic member is installed on the movable seat 2, and the metal member 7 is installed on the base 1.

[0050] The first receiving electrode plate 17 and the second receiving electrode plate 18 are identical in shape and arranged in a circumferential direction, and are connected to the top surface of the base 1. The emitter electrode plate 16 is arranged in a radial direction with respect to the first receiving electrode plate 17 and the second receiving electrode plate 18, and is connected to the base 1. The emitter electrode plate 16 forms a capacitor structure with the first receiving electrode plate 17 and the second receiving electrode plate 18, respectively.

[0051] The base 1 is further provided with an internal circuit, which is electrically connected to the circuit board 6. In addition, the internal circuit is electrically connected to the emitter electrode plate 16, the first receiving electrode plate 17 and the second receiving electrode plate 18.

[0052] The metal sheet 33 is connected to the bottom surface of the movable seat 2, and the vertical projection of the metal sheet 33 overlaps at least part of the vertical projection of the emitter electrode plate 16, the first receiving electrode plate 17 and the second receiving electrode plate 18. That is, the metal sheet 33 is located above the emitter electrode plate 16, the first receiving electrode plate 17 and the second receiving electrode plate 18. When the metal sheet 33 moves with the movable seat 2, the capacitance between the emitter electrode plate 16, the first receiving electrode plate 17 and the second receiving electrode plate 18 changes, and the change in capacitance can be used to detect the position of the movable seat 2, which functions as a position sensor.

[0053] As a preferred embodiment, the emitter electrode plate 16 is an arc-shaped plate extending in a circumferential direction of the base 1, and is located radially outward of the first receiving electrode plate 17 and the second receiving electrode plate 18. The first receiving electrode plate 17 and the second receiving electrode plate 18 are also arc-shaped plates extending in a circumferential direction, and are located radially inward of the emitter electrode plate 16. The length of the emitter electrode plate 16 in the circumferential direction is greater than the sum of the lengths of the first receiving electrode plate 17 and the second receiving electrode plate 18 in the circumferential direction.

[0054] The radial outer side of the metal sheet 33 overlaps at least part of the vertical projection of the emitter electrode plate 16, and the radial inner side of the metal sheet 33 overlaps at least part of the vertical projection of the first receiving electrode plate 17 and the second receiving electrode plate 18. That is, the radial outer side of the metal sheet 33 is located above the emitter electrode plate 16, and the radial inner side of the metal sheet 33 is located above the first receiving electrode plate 17 and the second receiving electrode plate 18, respectively.

[0055] When the metal sheet 33 rotates with the movable seat 2, the relative area of the metal sheet 33 and the emitter plate 16 does not change, but the relative area of the metal sheet 33 and the first receiving plate 17 and the second receiving plate 18 changes, when the relative area of the metal sheet 33 and the first receiving plate 17 increases, the relative area of the metal sheet 33 and the second receiving plate 18 decreases, and the increase of the relative area of the metal sheet 33 and the first receiving plate 17 is equal to the decrease of the relative area of the metal sheet 33 and the second receiving plate 18, and vice versa, so that the position of the movable seat 2 can be determined according to the change of the capacitance of the two capacitive structures.

[0056] Optionally, the radially outer side of the first receiving plate 17 and the second receiving plate 18 is an arc surface, and the curvature of the arc surface is basically consistent with the curvature of the radially inner side of the emitter plate 16. The radially inner side of the first receiving plate 17 and the second receiving plate 18 can be a plane, or can be designed in other shapes. When the relative area of the metal sheet 33 and the first receiving plate 17 increases, the relative area of the metal sheet 33 and the second receiving plate 18 decreases, but the increase of the relative area of the metal sheet 33 and the first receiving plate 17 is not equal to the decrease of the relative area of the metal sheet 33 and the second receiving plate 18, but the position of the movable seat 2 can also be determined according to the change of the capacitance of the two capacitive structures.

[0057] Optionally, the first receiving plate 17 and the second receiving plate 18 are rectangular plates. When the relative area of the metal sheet 33 and the first receiving plate 17 increases, the relative area of the metal sheet 33 and the second receiving plate 18 decreases, and the increase of the relative area of the metal sheet 33 and the first receiving plate 17 is not equal to the decrease of the relative area of the metal sheet 33 and the second receiving plate 18, but the position of the movable seat 2 can also be determined according to the change of the capacitance of the two capacitive structures.

[0058] The specific shape of the metal sheet 33, the emitter plate 16 and the two receiving plates is not limited, in the preferred embodiment, the relative area between the emitter plate 16 and the metal sheet 33 does not change during the movement, only the relative area between the receiving plates and the metal sheet 33 changes, so as to calculate the change of the capacitance between the emitter plate 16 and the two receiving plates, therefore, the bending curvature of the emitter plate 16 is designed to be consistent with the rotating curvature of the movable seat 2, and the metal sheet 33 is designed to have a corresponding bending curvature. In addition, the positions of the emitter plate 16 and the receiving plates can be interchanged.

[0059] The preferred embodiments of the present application have been described in detail above, but it should be understood that, if necessary, aspects of the embodiments can be modified to employ aspects, features and concepts of various patents, applications and publications to provide additional embodiments.

[0060] These and other changes can be made to the embodiments in light of the detailed description. In general, the chosen language of the claims should be construed as encompassing all possibilities in light of the disclosure of the specification and claims.

[0061] Those skilled in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the utility model, and in actual application, various changes can be made to them in form and details without departing from the spirit and scope of the utility model.

Claims

1. A lens aperture adjusting device, characterized by, The application relates to a lens aperture adjusting device, which comprises: a base; a first receiving electrode plate connected with the base; a second receiving electrode plate arranged along the circumference of the base and connected with the base; an emitting electrode plate, the first receiving electrode plate and the second receiving electrode plate being arranged along the radial direction and connected with the base, the emitting electrode plate forming a capacitor structure with the first receiving electrode plate and the second receiving electrode plate respectively; a movable base rotatably connected with the base; a metal sheet connected with the movable base, and the projection of the metal sheet along the vertical direction overlaps at least part of the projection of the emitting electrode plate, the first receiving electrode plate and the second receiving electrode plate along the vertical direction.

2. The lens aperture adjusting apparatus according to claim 1, wherein The emitting electrode plate is an arc-shaped plate extending along the circumference of the base and located radially outside the first receiving electrode plate and the second receiving electrode plate. The radial outer side of the metal sheet overlaps at least part of the projection of the emitting electrode plate along the vertical direction, and the radial inner side overlaps at least part of the projection of the first receiving electrode plate and the second receiving electrode plate along the vertical direction.

3. The lens aperture adjusting apparatus according to claim 2, wherein The radial outer side of the first receiving electrode plate and the second receiving electrode plate is arc-shaped.

4. The lens aperture adjusting apparatus according to claim 3, wherein The radial inner side of the first receiving electrode plate and the second receiving electrode plate is planar.

5. The lens aperture adjusting apparatus according to claim 2, wherein The first receiving electrode plate and the second receiving electrode plate are rectangular plates.

6. The lens aperture adjusting apparatus according to claim 2, wherein The first receiving electrode plate and the second receiving electrode plate are of the same shape.

7. The lens aperture adjustment apparatus according to claim 1, wherein The emitting electrode plate, the first receiving electrode plate and the second receiving electrode plate are located on the top surface of the base. The metal sheet is located on the bottom surface of the movable base.

8. The lens aperture adjustment apparatus according to claim 1, wherein The lens aperture adjusting device further comprises: a top cover, the edge of the top cover being fixedly connected with the edge of the base and forming a containing space; a plurality of blades, the plurality of blades being arranged in a ring shape on the movable base and being connected with the base and the movable base respectively; the movable base is provided with a magnet group, the base is provided with a coil group, and the coil group cooperates with the magnet group to drive the movable base to rotate.

9. The lens aperture adjusting apparatus according to claim 8, wherein The movable base is rollingly connected with the base.

10. The lens aperture adjustment apparatus according to claim 8, wherein One of the base and the movable base is provided with a magnetic member, and the other is provided with a metal member attracted to the magnetic member.

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