Adjustable aperture and lens

Abstract

The utility model discloses an adjustable aperture and a lens, relates to the lens structure technical field, the adjustable aperture comprises a pedestal, two aperture blades and a transmission structure, the pedestal comprises a mounting seat and a fixed frame sleeved outside the mounting seat, the mounting seat moves along the lens optical axis direction relative to the fixed frame, and the two aperture blades are arranged on the fixed frame. The lens focal length is adjusted; the two aperture blades are stacked on the mounting seat, each aperture blade is provided with a light hole, and the two aperture blades can be movably arranged in a staggered manner so as to adjust the area of the overlapped part of the two light holes; the transmission structure comprises a transmission part arranged on the mounting seat, and the transmission part is in transmission connection with the fixed frame and the at least one aperture blade so as to drive the aperture blade to move in a staggered manner when the fixed frame and the mounting seat move relatively. By arranging the transmission structure, the size of the aperture is adjusted while the focal length of the lens is adjusted, the overall structure is simple, and the manufacturing cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of lens structure, in particular to an adjustable aperture and a lens. Background Art

[0002] With the continuous improvement of consumption levels, in addition to conventional pixel indicators, aperture size, sensor volume, etc. have gradually become important indicators for evaluating the performance of electronic devices. Regarding the aperture size issue, electronic equipment manufacturers usually increase the aperture to increase the amount of light entering to improve the imaging effect of electronic devices under low ambient light sources, but blindly increasing the aperture may cause problems with edge image quality and highlight overflow, which in turn leads to a shorter depth of field, and the details cannot be fully presented in high-brightness environments, making the blur caused by defocus more severe and the depth of focus process more difficult; and reducing the aperture will inevitably affect the imaging effect of electronic devices, making it impossible for existing cameras to take into account both the shooting effect under small apertures and the edge image quality and highlight overflow under large apertures.

[0003] At present, in order to take into account the edge image quality and highlight overflow of the camera at a large aperture and the imaging effect at a small aperture, a variable aperture is usually set on the light-entering side of the camera. The aperture size of the light hole of the variable aperture can be adjusted according to the ambient brightness to adapt to different shooting environments, thereby ensuring the shooting effect of the camera. The existing variable aperture is generally driven by a stepper motor or solenoid valve to achieve aperture switching. When the lens space is narrow, there will be no effective placement space for the stepper motor or solenoid valve. Utility Model Content

[0004] The main purpose of the utility model is to provide an adjustable aperture and a lens, aiming to solve the problems of high manufacturing cost and large size of the current adjustable aperture.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an adjustable aperture, comprising:

[0006] The base comprises a mounting seat and a fixed frame sleeved on the outside of the mounting seat, wherein the mounting seat moves relative to the fixed frame along the optical axis of the lens to adjust the focal length of the lens;

[0007] Two aperture blades are stacked on the mounting seat, and each of the aperture blades is provided with a light-transmitting hole, and the two aperture blades can be movably arranged in a staggered manner to adjust the overlapping area of ​​the two light-transmitting holes; and

[0008] The transmission structure comprises a transmission member arranged on the mounting seat, wherein the transmission member is transmission-connected to the fixed frame and at least one of the aperture blades, so as to drive the aperture blades to move in a dislocated manner when the fixed frame and the mounting seat move relative to each other.

[0009] In one embodiment, one end of the transmission member is abutted against the fixed frame, and the other end is transmission-connected to at least one of the aperture blades, and the distance from the inner wall of the fixed frame to the optical axis gradually increases along the direction of the lens optical axis.

[0010] In one embodiment, the inner wall of the fixing frame is arranged in a stepped manner along the optical axis direction of the lens.

[0011] In one embodiment, the two aperture blades are rotatably mounted on the mounting seat.

[0012] In one embodiment, a guide groove is provided on the aperture blade, and a guide column extending into the guide groove is provided on the transmission member. The guide groove is set at a certain angle to the movement direction of the transmission member, so that the transmission member can move through the guide column to abut against the groove wall of the guide groove to drive the aperture blade to rotate.

[0013] In one embodiment, the guide grooves are provided on both of the aperture blades, and the two guide grooves are provided at a certain angle to the moving direction of the transmission member, and the guide pillars extend into the two guide grooves to synchronously drive the two aperture blades to rotate relative to each other.

[0014] In one embodiment, the transmission structure further includes an elastic reset member disposed between the transmission member and the mounting seat.

[0015] In one embodiment, the elastic return member includes a spring, one end of which is connected to the mounting seat, and the other end of which is connected to the transmission member, so as to always apply elastic force to the transmission member to resist the fixed frame.

[0016] In one embodiment, each of the light-transmitting holes includes a first light-transmitting portion and a second light-transmitting portion arranged in a fan shape, and a diameter of a circle corresponding to the first light-transmitting portion is greater than a diameter of a circle corresponding to the second light-transmitting portion.

[0017] The utility model also provides a lens, the lens comprising the above-mentioned adjustable aperture, the adjustable aperture comprising:

[0018] The base comprises a mounting seat and a fixed frame sleeved on the outside of the mounting seat, wherein the mounting seat moves relative to the fixed frame along the optical axis of the lens to adjust the focal length of the lens;

[0019] Two aperture blades are stacked on the mounting seat, and each of the aperture blades is provided with a light-transmitting hole, and the two aperture blades can be movably arranged in a staggered manner to adjust the overlapping area of ​​the two light-transmitting holes; and

[0020] The transmission structure comprises a transmission member arranged on the mounting seat, wherein the transmission member is transmission-connected to the fixed frame and at least one of the aperture blades, so as to drive the aperture blades to move in a dislocated manner when the fixed frame and the mounting seat move relative to each other.

[0021] In the technical solution provided by the utility model, two aperture blades are provided, each of which is provided with a light-transmitting hole, so that the area of ​​the overlapping part of the two light-transmitting holes can be adjusted during the dislocation of the two aperture blades, thereby realizing the adjustment of the aperture size. The transmission member is provided to drive the dislocation of the aperture blades when the fixed frame and the mounting seat move relative to each other, that is, during the process of adjusting the focal length of the lens. The entire structure is a mechanical transmission structure without an electric drive structure, and can ensure that the aperture size is changed synchronously during the process of adjusting the focal length of the lens, so as to provide an adjustable aperture with a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 A schematic structural diagram of an embodiment of an adjustable aperture provided by the utility model;

[0024] Figure 2 for Figure 1 Bottom view of the adjustable aperture;

[0025] Figure 3 for Figure 2 A cross-sectional view of the adjustable aperture at A;

[0026] Figure 4 for Figure 1 A schematic diagram of a part of the structure in which the adjustable aperture is in a half-open state;

[0027] Figure 5 for Figure 1 A schematic diagram of a portion of the structure in which the adjustable aperture is in a fully open state;

[0028] Figure 6 for Figure 1 Schematic diagram of part of the structure with the adjustable aperture in the closed state.

[0029] Description of Figure Numbers:

[0030] 1000, adjustable aperture; 1, base; 11, mounting seat; 12, fixing frame; 121, fully open section; 122, half open section; 123, closed section; 2, aperture blades; 21, light-transmitting hole; 211, first light-transmitting portion; 212, second light-transmitting portion; 22, guide groove; 3, transmission structure; 31, transmission member; 311, rubber nail; 312, guide column; 32, elastic reset member; 321, spring; 4, upper cover.

[0031] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0035] With the continuous improvement of consumption levels, in addition to conventional pixel indicators, aperture size, sensor volume, etc. have gradually become important indicators for evaluating the performance of electronic devices. Regarding the aperture size issue, electronic equipment manufacturers usually increase the aperture to increase the amount of light entering to improve the imaging effect of electronic devices under low ambient light sources, but blindly increasing the aperture may cause problems with edge image quality and highlight overflow, which in turn leads to a shorter depth of field, and the details cannot be fully presented in high-brightness environments, making the blur caused by defocus more severe and the depth of focus process more difficult; and reducing the aperture will inevitably affect the imaging effect of electronic devices, making it impossible for existing cameras to take into account both the shooting effect under small apertures and the edge image quality and highlight overflow under large apertures.

[0036] At present, in order to take into account the edge image quality and highlight overflow of the camera at a large aperture and the imaging effect at a small aperture, a variable aperture is usually set on the light-entering side of the camera. The aperture size of the light hole of the variable aperture can be adjusted according to the ambient brightness to adapt to different shooting environments, thereby ensuring the shooting effect of the camera. The existing variable aperture is generally driven by a stepper motor or solenoid valve to achieve aperture switching. When the lens space is narrow, there will be no effective placement space for the stepper motor or solenoid valve.

[0037] The main purpose of the utility model is to provide an adjustable aperture and a lens, aiming to solve the problems of high manufacturing cost and large size of the current adjustable aperture.

[0038] To achieve the above purpose, please refer to Figure 1 The utility model proposes an adjustable aperture 1000, comprising a base 1, two aperture blades 2 and a transmission structure 3, wherein the base 1 comprises a mounting seat 11 and a fixed frame 12 sleeved on the outside of the mounting seat 11, wherein the mounting seat 11 moves relative to the fixed frame 12 along the optical axis of the lens to adjust the focal length of the lens; the two aperture blades 2 are stacked on the mounting seat 11, and each of the aperture blades 2 is provided with a light-transmitting hole 21, and the two aperture blades 2 can be arranged to be staggered and movable to adjust the overlapping area of ​​the two light-transmitting holes 21; the transmission structure 3 comprises a transmission member 31 arranged on the mounting seat 11, wherein the transmission member 31 is transmission-connected to the fixed frame 12 and at least one of the aperture blades 2, so as to drive the aperture blades 2 to move in a staggered manner when the fixed frame 12 moves relative to the mounting seat 11.

[0039] In the technical solution provided by the utility model, two aperture blades 2 are provided, each of which is provided with a light-transmitting hole 21, so that the area of ​​the overlapping part of the two light-transmitting holes 21 can be adjusted during the dislocation of the two aperture blades 2, thereby achieving the adjustment of the aperture size. The transmission member 31 is provided to drive the dislocation of the aperture blades 2 when the fixed frame 12 and the mounting seat 11 move relative to each other, that is, during the process of adjusting the focal length of the lens. The entire structure is a mechanical transmission structure 3 without an electric drive structure, and can ensure that the aperture size is changed synchronously during the process of adjusting the focal length of the lens, so as to provide an adjustable aperture 1000 with a simple structure and low cost.

[0040] It is worth mentioning that the adjustable aperture 1000 also includes an upper cover 4, which is connected to the mounting seat 11 and is located above the two aperture blades 2 to position the two aperture blades 2 to prevent them from being directly exposed to the outside of the lens.

[0041] In one embodiment of the present invention, in order to realize the linkage between the fixing frame 12 and the transmission member 31, please refer to Figures 2 to 3 One end of the transmission member 31 is against the fixed frame 12, and the other end is transmission-connected to at least one of the aperture blades 2, and the distance between the inner wall of the fixed frame 12 and the lens optical axis gradually increases along the direction of the lens optical axis. With such a configuration, during the relative movement of the fixed frame 12 and the mounting seat 11, the transmission member 31 is guided by the inside of the fixed frame 12 and gradually moves away from the fixed frame 12, thereby driving at least one of the aperture blades 2 to move. The overall structure is simple, and all are mechanical transmission structures 3, and the cost is low.

[0042] It should be noted that the present solution does not limit the specific transmission form of the aperture blades 2 and the transmission member 31. For example, the transmission member 31 is fixedly connected to one of the aperture blades 2 to drive it to move relative to another fixed aperture blade 2; or, the transmission structure 3 also includes a gear and two racks meshing with the opposite ends of the gear, and the two racks move in opposite directions during the rotation of the gear; the transmission member 31 is connected to one of the racks, and the two racks are respectively connected to the two aperture blades 2, so that when the transmission member 31 drives the gear to rotate through the rack, the two aperture blades 2 are driven to move in opposite directions.

[0043] It is worth mentioning that in order to reduce the loss generated when the transmission member 31 and the inner wall of the fixed frame 12 move relative to each other, a rubber nail 311 is provided at the end of the transmission member 31 that abuts against the inner wall of the fixed frame 12. The end of the rubber nail 311 is arc-shaped, so that the transmission member 31 and the fixed frame 12 are in flexible contact, thereby reducing the wear of the transmission member 31 during the transmission process and improving the service life of the equipment.

[0044] Furthermore, in order to achieve customization of the aperture opening degree, the inner wall of the fixed frame 12 is arranged in a stepped manner along the optical axis direction of the lens. By arranging the inner wall of the fixed frame 12 in a stepped manner along the optical axis direction of the lens, the active position of the transmission member 31 is in a discrete state rather than a continuous state, so that the area of ​​the overlapping part of the light-transmitting portion is also in a discrete state, thereby ensuring the discreteness of the aperture opening amplitude. Since the relative movement distance of the lens during zooming is not uniform, such a setting is more reasonable in use, so as to achieve a specific aperture size when the lens is at several specific focal lengths.

[0045] Specifically, please refer to Figure 3 , Figures 4 to 6 The inner wall of the fixed frame 12 has a closed section 123, a half-open section 122 and a fully open section 121 arranged in a stepped manner, so that when the transmission member 31 abuts against the closed section 123, the half-open section 122 and the fully open section 121 respectively, the aperture is in a closed state, a half-open state and a fully open state. It is worth mentioning that the closed state does not mean that the aperture is in a completely closed state. It can be understood that the opening degree of the aperture is in a state that is smaller than the half-open state and the fully open state. The specific opening degree is not specifically limited in this solution.

[0046] In one embodiment of the present invention, please refer to Figures 4 to 6 The two aperture blades 2 are rotatably mounted on the mounting seat 11. By rotatably setting the two aperture blades 2, the space occupied by the aperture blades 2 can be reduced, and the rotation setting only needs to set a rotation center. Compared with other activity modes, there is no need to set guide structures such as slide grooves and slide rails, which is simpler in structure, thereby reducing the size of the device and reducing costs.

[0047] Furthermore, in order to realize that the transmission member 31 can drive the aperture blade 2 to rotate, a guide groove 22 is provided on the aperture blade 2, and a guide column 312 extending into the guide groove 22 is provided on the transmission member 31. The guide groove 22 is arranged at a certain angle to the movement direction of the transmission member 31, so that the movement of the transmission member 31 is supported by the guide column 312 against the groove wall of the guide groove 22 to drive the aperture blade 2 to rotate. Through the mutual cooperation between the guide groove 22 and the guide column 312, the transmission member 31 can drive the aperture blade 2 to rotate during the movement. The structure is simple, and both are mechanical transmission structures 3, and the cost is low. At the same time, the cooperation between the guide groove 22 and the guide column 312 is more stable, which improves the overall stability of the device.

[0048] Furthermore, in order to improve the opening efficiency of the aperture, the guide grooves 22 are provided on the two aperture blades 2, and the two guide grooves 22 are arranged at a certain angle with the moving direction of the transmission member 31, and the guide post 312 extends into the two guide grooves 22 to synchronously drive the two aperture blades 2 to rotate relative to each other. By extending the guide post 312 into the two guide grooves 2, the transmission member 31 can simultaneously drive the two aperture blades 2 to rotate relative to each other, thereby improving the relative rotation speed of the two aperture blades 2, thereby improving the efficiency of the aperture module, and also preventing the guide post 312 from interfering with one of the aperture blades 2 during the movement process, thereby ensuring the normal operation of the device.

[0049] In one embodiment of the present utility model, the transmission structure 3 further includes an elastic reset member 32 disposed between the transmission member 31 and the mounting seat 11. By providing the elastic reset member 32, the transmission structure 3 can always abut against the inner wall of the fixed frame 12, so that the transmission member 31 can be ensured to be in transmission connection with the fixed frame 12 whether the mounting seat 11 moves forward or backward along the optical axis direction.

[0050] In a preferred embodiment of the present invention, please refer to Figure 3 The elastic reset member 32 includes a spring 321, one end of which is connected to the mounting seat 11, and the other end of which is connected to the transmission member 31, and is used to always apply an elastic force to the transmission member 31 to resist the fixed frame 12. By setting the elastic member as the spring 321, the structure is simple and the installation is convenient. Of course, the present solution does not limit the specific form of the elastic member, for example, the elastic member can also be set as a rubber band that elastically binds the transmission member 31 and the fixed frame 12.

[0051] In a preferred embodiment of the present invention, please refer to Figures 4 to 6 Each of the light-transmitting holes 21 includes a first light-transmitting portion 211 and a second light-transmitting portion 212 arranged in a fan shape, and the diameter of the circle corresponding to the first light-transmitting portion 211 is greater than the diameter of the circle corresponding to the second light-transmitting portion 212. By arranging the first light-transmitting portion 211 and the second light-transmitting portion 212 in a fan shape, during the movement of the two aperture blades 2, the shape of the overlapping portion of the two light-transmitting holes 21 is formed by splicing the outline of the first light-transmitting portion 211 and / or the outline of the second light-transmitting portion 212, so that a large and a small circular aperture centered on the optical axis can be formed, so that the light of the lens is more uniform around, which is conducive to improving the image quality.

[0052] The present invention further proposes a lens, which includes the above-mentioned adjustable aperture 1000. Since the lens includes the adjustable aperture 1000, the specific structure of the adjustable aperture 1000 refers to the above-mentioned embodiment. Since the adjustable aperture 1000 of the present lens adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0053] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An adjustable aperture, characterized in that: include: The base comprises a mounting seat and a fixed frame sleeved on the outside of the mounting seat, wherein the mounting seat moves relative to the fixed frame along the optical axis of the lens to adjust the focal length of the lens; Two aperture blades are stacked on the mounting seat, and each of the aperture blades is provided with a light-transmitting hole, and the two aperture blades can be staggered and movably arranged to adjust the overlapping area of ​​the two light-transmitting holes; as well as, The transmission structure comprises a transmission member arranged on the mounting seat, wherein the transmission member is transmission-connected to the fixed frame and at least one of the aperture blades, so as to drive the aperture blades to move in a dislocated manner when the fixed frame and the mounting seat move relative to each other.

2. An adjustable aperture as claimed in claim 1, characterized in that: One end of the transmission member is against the fixed frame, and the other end is transmission-connected to at least one of the aperture blades. The distance from the inner wall of the fixed frame to the lens optical axis gradually increases along the direction of the lens optical axis.

3. An adjustable aperture as claimed in claim 2, characterized in that: The inner wall of the fixing frame is arranged in steps along the direction of the lens optical axis.

4. The adjustable aperture as claimed in claim 2, characterized in that: The two aperture blades are rotatably mounted on the mounting seat.

5. An adjustable aperture as claimed in claim 4, characterized in that: A guide groove is provided on the aperture blade, and a guide column extending into the guide groove is provided on the transmission member. The guide groove is arranged at a certain angle to the moving direction of the transmission member, so that the transmission member moves through the guide column to abut against the groove wall of the guide groove to drive the aperture blade to rotate.

6. An adjustable aperture as claimed in claim 5, characterized in that: The two aperture blades are both provided with the guide grooves, and the two guide grooves are both arranged at a certain angle with the moving direction of the transmission member, and the guide pillars extend into the two guide grooves to synchronously drive the two aperture blades to rotate relative to each other.

7. The adjustable aperture as claimed in claim 2, characterized in that: The transmission structure also includes an elastic reset member arranged between the transmission member and the mounting seat.

8. An adjustable aperture as claimed in claim 7, characterized in that: The elastic return member comprises a spring, one end of which is connected to the mounting seat, and the other end of which is connected to the transmission member, and is used for always applying elastic force to the transmission member to resist the fixing frame.

9. The adjustable aperture according to claim 1, wherein: Each of the light-transmitting holes comprises a first light-transmitting portion and a second light-transmitting portion which are arranged in a fan shape, and a diameter of a circle corresponding to the first light-transmitting portion is greater than a diameter of a circle corresponding to the second light-transmitting portion.

10. A lens comprising the adjustable aperture according to any one of claims 1 to 9.

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