CN215416211U - Lens aperture adjusting device - Google Patents

Abstract

The utility model discloses a lens diaphragm adjusting device which comprises a base, a rotating piece, a shell, a driving module and a shading piece, wherein the base, the rotating piece and the shell are provided with lens avoiding holes matched with lenses, the shell is arranged on the base and forms a movable space between the shell and the base, the rotating piece is rotatably arranged in the movable space, the driving module is arranged between the base and the rotating piece and is used for driving the rotating piece to move, the shading piece comprises a plurality of movable shading plates and is rotatably arranged in the movable space, the adjacent movable shading plates are sequentially superposed and annularly arranged, light through holes are formed in the middle positions of the movable shading plates, and the shading piece is arranged on the shell and is matched with the rotating piece to adjust the opening size of the lens avoiding holes when the rotating piece rotates. The lens aperture adjusting device solves the problem that the aperture size of the electronic equipment cannot be changed in the prior art.

Description

Lens aperture adjusting device

Technical Field

The utility model relates to the field of electronic equipment, in particular to a lens aperture adjusting device.

Background

For the camera aperture, in the place with strong light, the camera can obtain deeper depth of field and sharper picture by reducing the aperture, and in the place with insufficient light, the light-entering quantity can be increased by increasing the aperture, and then pure picture with higher exposure and lower noise point can be obtained. In the field of electronic equipment, the size of an aperture of a camera of general electronic equipment cannot be changed, so that the camera cannot adapt to various shooting environments by changing the aperture, and thus, many electronic equipment are overexposed outdoors in strong sunlight, and underexposed during shooting at night, the picture is dim, the noise is high, and details are lost.

In view of the above, there is a need in the art to develop a novel iris diaphragm in order to overcome the above technical problems.

SUMMERY OF THE UTILITY MODEL

The present invention provides a lens aperture adjusting device to solve at least the problem of the prior art that the aperture size of the electronic device is not changeable.

In order to solve the above problems, according to an aspect of the present invention, there is provided a lens aperture adjusting device, the lens aperture adjusting device includes a base, a rotating member, a housing, a driving module, and a light shielding member, the base, the rotating member, and the housing are provided with a lens avoiding hole engaged with a lens, the housing is mounted on the base and forms a movable space between the housing and the base, the rotating member is rotatably mounted in the movable space, the driving module is disposed between the base and the rotating member and is configured to drive the rotating member to move, the light shielding member includes a plurality of movable shielding plates and is rotatably mounted in the movable space, adjacent movable shielding plates are sequentially stacked and annularly disposed, a light passing hole is formed at a middle position of the plurality of movable shielding plates, and the light shielding member is disposed on the housing and engaged with the rotating member to adjust an opening size of the lens avoiding hole when the rotating member rotates And (6) carrying out adjustment.

In one embodiment, the movable shutter has a rear end connected to the housing and a front end opposite to the rear end, the front end is provided with an inclined surface, one end of the inclined surface is provided with a circular arc notch, the plurality of movable shutters are driven to rotate simultaneously by a rotating member, the inclined surfaces of the plurality of movable shutters form a large polygonal aperture when combined with each other, and the circular arc notches of the plurality of movable shutters form a small aperture when combined with each other.

In one embodiment, the movable shielding plate is provided with a sliding groove, the rotating member is provided with a movable pin correspondingly matched with the sliding groove, and the sliding groove and the movable pin are matched to drive the movable shielding plate to move along the sliding groove when the rotating member rotates.

In one embodiment, the movable shielding plate is further provided with a positioning pin hole which is arranged behind the sliding groove, and the shell is provided with a positioning pin and connected with the positioning pin hole through the positioning pin.

In one embodiment, the lens aperture adjusting apparatus further includes a wear-proof member disposed below the light-shielding member to prevent the movable shutter from rubbing against the lens.

In one embodiment, the wear member is annular and includes an outer peripheral portion and an inner peripheral portion, wherein the outer peripheral portion has a thickness greater than a thickness of the inner peripheral portion.

In one embodiment, the wear member further includes an intermediate ring portion between the outer peripheral portion and the inner peripheral portion, the intermediate ring portion having a thickness less than a thickness of the outer peripheral portion and greater than a thickness of the inner peripheral portion.

In one embodiment, the driving module comprises a driving magnet and a driving coil, the bottom of the rotating piece is provided with a plurality of magnet mounting grooves, the driving magnet is arranged in the magnet mounting grooves, and the driving coil is arranged on the base and arranged below the driving magnet to be matched with the driving magnet.

In one embodiment, a built-in circuit board is disposed within the base, the built-in circuit board being electrically connected to the drive coil and supplying power to the drive coil.

In one embodiment, the built-in circuit board is further provided with a position sensor, and the position sensor is matched with the driving magnet to detect the position of the rotating piece.

In one embodiment, the driving module further includes an induction magnet, the induction magnet is disposed on a surface of the rotating member facing the base, and a position sensor correspondingly matched with the induction magnet is disposed on a surface of the built-in circuit board facing the rotating member.

In one embodiment, at least one limiting protrusion is arranged on the inner side wall of the shell, at least one limiting groove corresponding to the limiting protrusion is arranged on the outer side wall of the rotating part, and the limiting protrusion and the limiting groove are matched to limit the rotating range of the rotating part.

In one embodiment, the rotating member and the base are provided with at least one pair of oppositely arranged grooves, and balls are arranged between the oppositely arranged grooves and can move in the grooves.

In one embodiment, at least one end of the groove is provided with a limit post, and the limit post prevents the ball from being separated from the groove when the rotating member rotates.

In one embodiment, the height of the limiting column is smaller than the distance between the rotating piece and the base.

In one embodiment, the lens aperture adjusting device further comprises a top cover, the light shielding member is arranged between the top cover and the shell, and the top cover is provided with a light shielding hole matched with the lens.

The lens diaphragm adjusting device at least has the following beneficial technical effects:

first, an aperture adjustment apparatus for an electronic device with a variable aperture size is provided.

And secondly, the volume of the aperture adjusting device on the electronic equipment is compressed.

Drawings

Fig. 1 is a cross-sectional view of a lens aperture adjusting apparatus according to an embodiment of the present invention.

Fig. 2 is an exploded view of a lens aperture adjusting apparatus according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a shutter according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of the bottom of the housing of one embodiment of the present invention.

Fig. 5 is a schematic view of the structure of the bottom of the rotating member according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a lens aperture adjusting apparatus according to an embodiment of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the utility model can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

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 phrases "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 may be combined in any suitable manner in one or more embodiments.

In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms.

The present invention provides a lens aperture adjusting device, which includes a base, a rotating member, a housing, a driving module, and a light shielding member, wherein the base, the rotating member, and the housing are provided with a lens avoiding hole engaged with the lens so that light can be incident into the lens, the housing is mounted on the base and forms a movable space between the housing and the base, the rotating member is rotatably mounted in the movable space, the driving module is disposed between the base and the rotating member and is used for driving the rotating member to move, the light shielding member includes a plurality of movable shielding plates rotatably mounted in the movable space, adjacent movable shielding plates are sequentially stacked and annularly disposed, a light transmitting hole is formed at a middle position of the plurality of movable shielding plates, the light shielding member is disposed on the housing and engaged with the rotating member so as to adjust an opening size of the lens avoiding hole when the rotating member rotates, the amount of light entering the lens through the through hole surrounded by the shading member is changed, so that the size of the aperture is changed. The utility model provides a lens aperture adjusting device capable of changing the size of an aperture and having a small volume.

The lens aperture adjusting device is generally sleeved on the lens. As shown in fig. 1 and 2, the lens aperture adjusting device is a cylinder as a whole and includes a base 10, a rotating member 20, a housing 30, a driving module and a light shielding member, the base 10, the rotating member 20 and the housing 30 are provided with lens avoiding holes matched with lenses, the housing 30 is installed on the base 10 and forms a movable space between the housing 30 and the base 10, the rotating member 20 is rotatably installed in the movable space, the driving module is disposed between the base 10 and the rotating member 20 and is used for driving the rotating member 20 to move, the light shielding member is provided with six movable shielding plates 40, the structure of each movable shielding plate 40 is the same, each adjacent movable shielding plate 40 is sequentially overlapped and annularly disposed and forms a light passing hole in the middle position, and the light shielding member is disposed on the housing 30 and matched with the rotating member 20 to adjust the size of the opening of the lens avoiding hole when the rotating member 20 rotates. It should be understood by those skilled in the art that the shutter is not limited to six, and it is possible to change the size of the lens aperture without departing from the scope of the present invention by connecting a plurality of adjacent shutter plates, which are stacked in sequence, to the housing and arranging them in a ring shape.

In one embodiment, the movable shutter may be configured to have a rear end connected to the housing and a front end opposite to the rear end, the front end having an inclined surface, one end of the inclined surface having an arc notch, and the plurality of movable shutters are driven by the rotating member to rotate simultaneously, when the inclined surfaces of the plurality of movable shutters are combined with each other to form a large polygonal aperture, and when the arc notches of the plurality of movable shutters are combined to form a small circular aperture. Specifically, as shown in fig. 2 and 3, the shutter 40 has a rear end connected to the housing and a front end opposite to the rear end, and a slope 43 is provided on the front end, and a circular arc notch 44 is further provided on the front end adjacent to the slope 43, and the circular arc notch 44 is a circular arc protruding in the radial direction of the rotary member 20. When the rotating piece rotates, the rotating piece drives the movable shielding plates to rotate simultaneously, when the inclined planes at the upper front ends of all the movable shielding plates are combined, a polygonal large aperture is formed, and when the arc notches at the upper front ends of all the movable shielding plates are combined, a circular small aperture is formed. The sizes of the polygonal diaphragm and the circular diaphragm can be set by adjusting the sizes of the inclined plane and the circular arc notch. The setting can be performed by those skilled in the art according to actual needs.

Furthermore, a sliding groove is formed in the movable shielding plate, a movable pin which is correspondingly matched with the sliding groove is arranged on the rotating piece, and the sliding groove is matched with the movable pin to drive the movable shielding plate to move along the sliding groove when the rotating piece rotates. Specifically, as shown in fig. 2 and 3, each of the movable shutters 40 is provided with a slide groove 42, and the rotary member 20 is provided with a movable pin 21 correspondingly engaged with the slide groove 42. When the rotating piece rotates, the movable pin moves in the sliding groove to drive the movable shielding plates to move along the sliding groove, the sizes of the light through holes in the middle positions surrounded by the movable shielding plates can be changed, after the inclined planes at the front ends of all the movable shielding plates are combined, a polygonal aperture is formed, and after the arc notches at the front ends of all the movable shielding plates are combined, a circular aperture is formed, so that the purpose of adjusting the sizes of the apertures of the lens is achieved. The utility model is not limited to the movable pin on the rotating member corresponding to the sliding groove on the movable shielding plate, and the movable pin can be arranged on the movable shielding plate and the sliding groove can be arranged on the rotating member without departing from the scope of the utility model.

Preferably, a positioning pin hole may be provided in the movable shutter, the positioning pin hole is provided behind the sliding groove, that is, at a position of a rear end of the movable shutter connected to the housing, and a positioning pin is provided at a corresponding position on the housing and connects the movable shutter and the housing through the positioning pin and the positioning pin hole. Referring to fig. 2 and 3, each shutter 40 is pivotally connected to the housing 30, and in the present embodiment, the shutter 40 can rotate around the positioning pin 31 by providing the positioning pin 31 at the position of the rear end of the shutter 40 connected to the housing 30 and providing the positioning pin hole 41 at the corresponding position of the shutter 40, so that the rotation of the shutter 40 around the housing 30 is realized. When the rotating piece rotates, the movable pin moves in the sliding groove to drive the movable shielding plates to move along the sliding groove, meanwhile, the movable shielding plates rotate around the shell around the positioning pin, when each movable shielding plate moves around the shell simultaneously, the sizes of the light through holes in the middle positions surrounded by the movable shielding plates can be changed, the inclined planes of the front ends of all the movable shielding plates are combined to form a polygonal aperture, and the arc notches of the front ends of all the movable shielding plates are combined to form a circular aperture, so that the purpose of adjusting the sizes of the apertures of the lenses is achieved. The shell can be provided with a positioning hole, the movable shielding plate is provided with a positioning pin, or the shell and the movable shielding plate can be connected by other pin shafts without departing from the scope of the utility model.

Further, the lens aperture adjusting device may further include an anti-abrasion member disposed below the light shielding member to prevent friction between the movable shutter and the lens. Preferably, the wear-proof member is provided in a ring shape and includes an outer peripheral portion and an inner peripheral portion, wherein the outer peripheral portion is thicker than the inner peripheral portion. Further preferably, the wear-proof member may be further provided to include an intermediate ring portion between the outer peripheral portion and the inner peripheral portion, the intermediate ring portion having a thickness smaller than that of the outer peripheral portion and larger than that of the inner peripheral portion. As shown in fig. 1 and 2, the lens aperture adjusting device further includes a wear-proof member 50, the wear-proof member 50 is disposed below the light-shielding member, the wear-proof member 50 is provided with a through hole matched with the lens and is annular and includes an inner circumference portion 51, an intermediate ring portion 52 and an outer circumference portion 53, wherein the thicknesses of the inner circumference portion 51, the intermediate ring portion 52 and the outer circumference portion 53 are sequentially increased, by this arrangement, the upper end surface of the outer circumference contacts with the lower end surface of the light-shielding member, so as to prevent the lens from being worn by the light-shielding member, and a person skilled in the art can set the wear-proof member according to actual needs. It should be understood by those skilled in the art that the anti-wear member is not limited to be provided with an inner peripheral portion, an intermediate ring portion and an outer peripheral portion, and the thicknesses of the inner peripheral portion and the outer peripheral portion are sequentially thicker, but may be provided with only an inner peripheral portion and an outer peripheral portion, and the thickness of the inner peripheral portion is smaller than that of the outer peripheral portion.

In another embodiment, the driving module may include a driving magnet and a driving coil, the bottom of the rotating member is provided with a plurality of magnet mounting grooves, the driving magnet is disposed in the magnet mounting grooves, and the driving coil is disposed on the base and disposed below the driving magnet to be matched with the driving magnet. Referring to fig. 2 and 5, four driving coils 11 are uniformly arranged on the upper surface of the base 10, eight magnet mounting grooves (not shown) are formed in the lower surface of the rotating member 20, eight driving magnets 21 are arranged in the magnet mounting grooves, one driving coil 11 is correspondingly arranged on each two driving magnets 21, and after the driving coils 11 are powered on, the driving magnets 21 drive the rotating member 20 to start rotating motion so as to drive the shading member to adjust the opening size of the lens avoiding hole. It is to be understood that six drive magnets may be provided and three drive coils may be provided and are not limited to eight drive magnets and four drive coils, and that the number of magnet mounting grooves may be set to six and is not limited to eight without departing from the scope of the present invention, and those skilled in the art can arrange them according to actual needs. The drive coil is not limited to being provided on the base, and the drive coil may be provided on the housing and the drive magnet may be provided on the outer peripheral side of the rotor at a position corresponding to the drive coil without departing from the scope of the present invention.

Furthermore, a built-in circuit board can be arranged in a base of the lens aperture adjusting device, and the built-in circuit board is electrically connected with the driving coil and supplies power to the driving coil. Specifically, as shown in fig. 2, a built-in circuit board (not shown) is provided in the base of the lens aperture adjustment device, and the built-in circuit board is electrically connected to the driving coil 11 and supplies power to the driving coil 11. After the built-in circuit board is used for electrifying the driving coil 11, the driving magnet 21 drives the rotating piece 20 to start rotating motion so as to drive the shading piece to adjust the opening size of the lens avoiding hole. It should be understood that the built-in circuit board can also be arranged on the upper surface of the base to be connected with the driving coils without departing from the scope of the present invention, and the built-in circuit board only needs to be capable of being connected with and electrifying the driving coils, and the arrangement can be carried out by a person skilled in the art according to actual needs.

Furthermore, the built-in circuit board is also provided with a position sensor, and the position sensor is matched with the driving magnet to detect the position of the rotating piece. Preferably, the driving module further includes an induction magnet disposed on a surface of the rotating member facing the base, and a position sensor correspondingly engaged with the induction magnet is disposed on a surface of the built-in circuit board facing the rotating member. Specifically, as shown in fig. 2, a position sensor 12 is disposed on the built-in circuit board, an induction magnet (not shown) is disposed on a lower surface of the rotating member 20 at a position corresponding to the position sensor 12, the induction magnet and the position sensor are matched with each other, when the circuit board energizes the driving coil, the driving magnet generates electromagnetic induction to drive the rotating member to rotate, and simultaneously the induction magnet changes along with a distance between the rotating member and the position sensor, a magnetic field change is converted into an electrical signal, and the position sensor can induce rotation information of the rotating member. In addition, a person skilled in the art can also use the driving magnet 21 as an induction magnet by enlarging the volume thereof, and thus, it is not necessary to provide a special induction magnet. The technical solutions above may be set as desired by those skilled in the art without departing from the scope of the present invention.

In another embodiment, the inner side wall of the housing may further have at least one limiting protrusion, the outer side wall of the rotating member may have at least one limiting groove corresponding to the limiting protrusion, and the limiting protrusion and the limiting groove cooperate to limit the rotation range of the rotating member. As shown in fig. 2 and 4, 4 limiting protrusions 32 are uniformly arranged on the inner side wall of the housing, 4 limiting grooves 22 corresponding to the limiting protrusions 32 are arranged on the outer side wall of the rotating member 20, the limiting grooves 22 are uniformly distributed around the periphery of the rotating member 20, the length of each limiting groove 22 is greater than the width of each limiting protrusion 32, so that the limiting protrusions 32 can move in the limiting grooves 22, the limiting protrusions 32 are arranged to be matched with the limiting grooves 22 to limit the rotation range of the rotating member 20, and the rotation range of the rotating member 20 is the range in which the limiting protrusions 32 can move in the limiting grooves 22. It should be understood that the number of the limiting grooves and the number of the limiting protrusions may be one, two, three or more than four, without departing from the scope of the present invention, and those skilled in the art can arrange the limiting grooves and the limiting protrusions according to actual needs.

In another embodiment, the rotating member and the base may further have at least one pair of oppositely disposed grooves, and a ball may be disposed between the oppositely disposed grooves, and the ball may move in the grooves. As shown in fig. 2 and 5, four pairs of oppositely disposed grooves 13 are formed on the rotating member and the base 10, a ball 14 is disposed between each pair of oppositely disposed grooves 13, the ball 14 can move in the groove 13, and when the rotating member 20 is placed on the base 10 and the rotating member 20 rotates, the ball 14 rolls in the groove 13, thereby reducing the friction between the rotating member 20 and the base 10. The setting can be performed by those skilled in the art according to actual needs. It should be understood that the relative arrangement of the grooves on the rotary member and the base is not limited to four pairs.

Further, the groove can be provided with a limiting column at least one end part, and preferably, the height of the limiting column is smaller than the distance between the rotating piece and the base. As shown in fig. 2, one end side of the groove 13 is provided with a stopper post 15, and the height of the stopper post 15 is smaller than the distance between the rotary member 20 and the base 10. Prevent the ball from breaking away from in the recess of relative setting when making the rotating member rotatory through setting up spacing post, improve the result of use. The setting can be performed by those skilled in the art according to actual needs.

The lens aperture adjusting device can also be provided with a top cover, the shading piece is arranged between the top cover and the shell, and the top cover is provided with a shading hole matched with the lens. As shown in fig. 1 and 2, the lens aperture adjusting apparatus may further include a top cover 60, a light shielding member disposed between the top cover 60 and the housing 30, and the top cover 60 having a light shielding hole for cooperating with the lens, which can be set by those skilled in the art according to actual needs.

The above examples are merely illustrative of the preferred embodiments of the present application and are not intended to limit the scope of the present application.

The utility model provides a lens aperture adjusting device, which solves the problems that the aperture of electronic equipment can not shield the lens and the size of the aperture cannot be changed in the prior art. Compared with domestic similar research and product achievements, the lens diaphragm adjusting device has the following beneficial technical effects:

first, an aperture adjustment apparatus for an electronic device with a variable aperture size is provided.

And secondly, the volume of the aperture adjusting device on the electronic equipment is compressed.

While the preferred embodiments of the present invention have been illustrated and described in detail, it should be understood that various changes and modifications of the utility model can be effected therein by those skilled in the art after reading the above teachings of the utility model. Such equivalents are intended to fall within the scope of the claims appended hereto.

Claims (16)

1. A lens aperture adjusting device is characterized by comprising a base, a rotating piece, a shell, a driving module and a shading piece, the base, the rotating piece and the shell are provided with a lens avoiding hole matched with the lens, the shell is arranged on the base and forms a movable space between the shell and the base, the rotating part is rotatably arranged in the movable space, the driving module is arranged between the base and the rotating part and is used for driving the rotating part to move, the shading piece comprises a plurality of movable shading plates and is rotatably arranged in the movable space, the adjacent movable shading plates are sequentially overlapped and annularly arranged, a light through hole is formed in the middle of the plurality of movable shading plates, the shading piece is arranged on the shell and matched with the rotating piece so that the opening size of the lens avoiding hole can be adjusted when the rotating piece rotates.

2. The lens aperture adjusting apparatus according to claim 1, wherein the shutter has a rear end connected to the housing and a front end opposite to the rear end, the front end being provided with a slant surface, one end of the slant surface being provided with a circular arc notch, the plurality of shutters being driven to rotate simultaneously by the rotating member, the slant surfaces of the plurality of shutters constituting a large aperture having a polygonal shape when combined with each other, and the circular arc notches of the plurality of shutters constituting a small aperture when combined with each other.

3. The apparatus as claimed in claim 2, wherein the shutter has a sliding slot, the rotary member has a movable pin corresponding to the sliding slot, and the sliding slot and the movable pin cooperate to move the shutter along the sliding slot when the rotary member rotates.

4. The lens aperture adjusting apparatus according to claim 3, wherein the movable shutter is further provided with a positioning pin hole provided at the rear of the slide groove, and the housing is provided with a positioning pin and connected to the positioning pin hole through the positioning pin.

5. The lens aperture adjustment apparatus according to claim 1, further comprising a wear-proof member disposed below the light-shielding member to prevent the movable shutter from rubbing against the lens.

6. The lens aperture adjustment device according to claim 5, wherein the wear-proof member is annular and includes an outer peripheral portion and an inner peripheral portion, wherein a thickness of the outer peripheral portion is greater than a thickness of the inner peripheral portion.

7. The lens aperture adjustment device according to claim 6, wherein the wear-proof member further includes an intermediate ring portion between the outer peripheral portion and the inner peripheral portion, the intermediate ring portion having a thickness smaller than that of the outer peripheral portion and larger than that of the inner peripheral portion.

8. The lens aperture adjusting apparatus according to claim 1, wherein the driving module includes a driving magnet and a driving coil, a plurality of magnet mounting grooves are provided at a bottom of the rotary member, the driving magnet is disposed in the magnet mounting grooves, and the driving coil is disposed on the base and disposed below the driving magnet to be engaged with the driving magnet.

9. The lens aperture adjusting apparatus according to claim 8, wherein a built-in circuit board is provided in the base, and the built-in circuit board is electrically connected to the driving coil and supplies power to the driving coil.

10. The lens aperture adjusting apparatus according to claim 9, wherein the built-in circuit board is further provided with a position sensor which cooperates with the driving magnet to detect a position of the rotary member.

11. The apparatus according to claim 10, wherein the driving module further comprises a magnet, the magnet is disposed on a surface of the rotating member facing the base, and a position sensor is disposed on a surface of the built-in circuit board facing the rotating member and corresponding to the magnet.

12. The lens aperture adjusting device according to claim 1, wherein at least one limiting protrusion is disposed on an inner sidewall of the housing, at least one limiting groove corresponding to the limiting protrusion is disposed on an outer sidewall of the rotating member, and the limiting protrusion and the limiting groove cooperate to limit a rotation range of the rotating member.

13. The lens aperture adjusting apparatus according to claim 1, wherein the rotating member and the base have at least one pair of oppositely disposed grooves, and a ball is disposed between the oppositely disposed grooves, and the ball can move in the grooves.

14. The lens aperture adjusting apparatus of claim 13, wherein at least one end of the groove is provided with a stopper post, the stopper post preventing the ball from being disengaged from the groove when the rotary member rotates.

15. The lens aperture adjusting apparatus of claim 14, wherein the height of the limiting post is smaller than the distance between the rotating member and the base.

16. The lens aperture adjusting apparatus according to claim 1, further comprising a top cover, wherein the light blocking member is provided between the top cover and the housing, and the top cover is provided with a light blocking hole for engaging with the lens.

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