Variable aperture structure with good stability and photographic equipment

Abstract

The invention relates to an aperture structure, in particular to a high-stability variable aperture structure and photographic equipment, which comprises a fixing assembly, the fixing assembly comprises a fixing seat and a fixing cover, and a rotatable turntable and a plurality of aperture blades are mounted between the fixing seat and the fixing cover. The aperture blades are movably connected between the rotating disc and the fixing assembly through a guide structure, the fixing assembly is provided with a limiting concave part, the rotating disc is provided with a limiting groove, and the aperture-variable adjusting hole a is defined by the aperture blades. The rolling piece is arranged between the fixing assembly and the rotating disc in a point contact mode on the rotating disc, so that the rotating disc reduces rotating friction and improves rotating efficiency through the point-contact rolling piece, the rolling piece supports the rotating position of the rotating disc in a point contact mode, and the zero-clearance matching effect is achieved; the stable opening and closing of the aperture blades benefit from the zero-clearance stable rotation of the turntable, thereby facilitating the improvement of the photographing and imaging effect of a user, and improving the photographing quality.

Description

TECHNICAL FIELD

[0001] The application relates to an aperture structure, in particular to a variable aperture structure with good stability and a photographic equipment. BACKGROUND

[0002] An aperture is an adjustable opening in a camera lens that controls the amount of light entering the camera's light-sensitive element (such as film or a digital sensor). It is one of the three main exposure elements (the other two being shutter speed and ISO sensitivity), and has a direct impact on the exposure and depth of field of the captured image. In strong light, a smaller aperture can provide a deeper depth of field and sharper images, while in low light, a larger aperture can provide higher exposure and lower noise.

[0003] Most existing aperture structures use a ball turntable structure to rotate around the circumference to drive the aperture blades to open or close, achieving aperture size adjustment. However, the existing aperture structure often has a small installation gap that is difficult to avoid, causing the turntable to still have slight shaking when rotating, resulting in unstable opening and closing. During aperture adjustment, these slight shakes can directly affect the quality of the final shooting output. Therefore, ensuring the stability of aperture adjustment is an important aspect of aperture structure. SUMMARY

[0004] To solve the problem of slight shaking caused by installation gap in the existing aperture structure affecting the quality of the shooting, the technical solution adopted by the application is as follows: A variable aperture structure with good stability, comprising a fixed assembly, the fixed assembly comprising a fixed seat with a first through hole and a fixed cover with a second through hole, the fixed cover being detachably mounted on the fixed seat, a rotatable turntable and a plurality of aperture blades being installed between the fixed seat and the fixed cover, the turntable having a third through hole, the first through hole, the second through hole and the third through hole being coaxially arranged, the aperture blades being movably connected between the turntable and the fixed assembly through a guide structure; Further comprising a rolling element arranged between the fixed assembly and the turntable in a point contact manner, the fixed assembly having a limiting recess for accommodating the rolling element, the turntable being provided with a limiting groove for cooperating with the rolling element, the limiting groove being arranged in a circular arc structure extending along the circumferential direction around the rotation axis e of the turntable; A plurality of aperture blades enclose an adjustable aperture a, when the turntable rotates, a plurality of aperture blades move to expand or reduce the adjustable aperture a.

[0005] The variable aperture structure with good stability described above also includes a driver mounted on the fixed component. The output end of the driver is fitted with a transmission component. The outer periphery of the turntable is provided with a transmission structure. The transmission component is connected to the transmission structure. The driver drives the transmission component to rotate synchronously, so that the transmission component can drive the turntable to rotate circumferentially relative to the fixed component via the transmission structure.

[0006] As described above, in a variable aperture structure with good stability, the driver is a drive motor, the output end of the driver is an output shaft structure, the transmission component is a gear structure, the transmission structure is a gear tooth structure, and the transmission component meshes with the transmission structure.

[0007] The variable aperture structure with good stability described above further includes a magnetic attraction component for stabilizing the stop position of the turntable. The magnetic attraction component includes a first mating part with magnetic force and a second mating part that can be magnetically attracted. The first mating part is installed on one of the fixed component and the turntable, and the second mating part is installed on the other of the fixed component and the turntable. The second mating part is located within the magnetic attraction range of the first mating part.

[0008] In the variable aperture structure with good stability described above, the first mating component is a sheet-like structure, and the second mating component is a ring-like structure.

[0009] As described above, a variable aperture structure with good stability is provided, in which at least three first mating parts are arranged circumferentially around the rotation axis e of the turntable. The annular structure has ring arms whose radial dimensions gradually increase along the circumferential direction. The same number of ring arms as the first mating parts are arranged circumferentially around the rotation axis e of the turntable, corresponding to the positions of the first mating parts.

[0010] As described above, a variable aperture structure with good stability is provided, wherein the guide structure includes a hinge post for extending into the turntable and a guide post for extending into the fixing component. The fixing component has a guide groove for limiting the movement direction of the guide post. The guide groove is circumferentially spaced around the rotation axis e of the turntable and is radially inclined relative to the rotation axis e of the turntable.

[0011] As described above, in a variable aperture structure with good stability, the limiting groove has an inclined groove surface structure b, and the groove surface structure b forms an inclined angle c with the central axis of the turntable, the angle c ranging from 30 degrees to 60 degrees.

[0012] As described above, in a variable aperture structure with good stability, the rolling element is a ball bearing structure or a roller structure, and at least three of the rolling elements are arranged circumferentially around the rotation axis e of the turntable. The same number of limiting grooves as the rolling elements are arranged circumferentially around the rotation axis e of the turntable, corresponding to the positions of the rolling elements.

[0013] A photographic device comprising the variable aperture structure described above.

[0014] The beneficial effects of this invention are as follows: This invention employs rolling elements on the turntable, positioned in point contact between the fixed component and the turntable. This reduces rotational friction and improves rotational efficiency by utilizing the rolling elements in point contact. The rolling elements support the rotational position of the turntable in a point-contact manner, achieving a zero-clearance fit. This makes the turntable more stable during rotation. Through the cooperation between the rolling elements and the limiting groove, the turntable can limit its rotation range by utilizing the travel of the rolling elements within the limiting groove. This limits the maximum opening and minimum closing posture of the aperture blades. The stable opening and closing of the aperture blades benefits from the zero-clearance stable rotation of the turntable, which is beneficial for improving the user's photographic imaging effect and enhancing shooting quality. Attached Figure Description

[0015] Figure 1 This is a perspective view of a variable aperture structure with good stability according to the present invention.

[0016] Figure 2 This is an internal structural diagram of a variable aperture structure with good stability according to the present invention.

[0017] Figure 3 for Figure 2 A magnified view of A.

[0018] Figure 4 This is a structural diagram of the magnetic suction assembly mounted on the mounting base of the present invention.

[0019] Figure 5 This is a layout diagram of the magnetic suction component of the present invention.

[0020] Figure 6 This is a structural diagram of the turntable mounting magnetic suction assembly and transmission engagement of the present invention.

[0021] Figure 7 This is an exploded perspective view of a variable aperture structure with good stability according to the present invention. Detailed Implementation

[0022] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0024] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0025] Example 1 Figures 1 to 7 This embodiment provides a stable variable aperture structure, including a fixing component 1. The fixing component 1 includes a fixing base 11 with a first through hole 101 and a fixing cover 12 with a second through hole 102. The fixing cover 12 is detachably mounted on the fixing base 11. A rotatable turntable 2 and several aperture blades 3 are installed between the fixing base 11 and the fixing cover 12. The turntable 2 has a third through hole 103. The first through hole 101, the second through hole 102, and the third through hole 103 are coaxially arranged. The aperture blades 3 are movably connected by a guide structure. Between the turntable 2 and the fixed component 1, there is also a rolling element 4 that is disposed between the fixed component 1 and the turntable 2 in a point contact manner. The fixed component 1 has a limiting recess 13 for accommodating the rolling element 4. The turntable 2 has a limiting groove 21 for cooperating with the rolling element 4. The limiting groove 21 adopts an arc-shaped structure and extends in the circumferential direction around the rotation axis e of the turntable 2. Several aperture blades 3 surround and form an adjustment hole a with a variable aperture. When the turntable 2 rotates, it drives several aperture blades 3 to move to enlarge or shrink the adjustment hole a.

[0026] Specifically, in this embodiment, the fixing component 1 is a shell structure of a variable aperture structure, which is detachably assembled from a fixing base 11 and a fixing cover 12. The turntable 2 is installed between the fixing base 11 and the fixing cover 12. The rolling element 4 restricts the installation position of the turntable 2 in the axial and radial directions, so that it can rotate stably. The first through hole 101, the second through hole 102, and the third through hole 103 are through hole structures for light to pass through. The aperture blades 3 are movably connected to the turntable 2 and the fixing component 1 through the guide structure. In this embodiment, the aperture blades 3 are movably connected to the fixing cover 12. By rotating the turntable 2 manually or automatically, several aperture blades 3 are moved to enlarge or shrink the adjustment hole a, so as to achieve precise adjustment of the aperture size.

[0027] In this embodiment, a rolling element 4 is used on the turntable 2, positioned in a point-contact manner between the fixed component 1 and the turntable 2. This allows the turntable 2 to reduce rotational friction and improve rotational efficiency by relying on the rolling element 4. The rolling element 4 supports the rotational position of the turntable 2 in a point-contact manner, achieving a zero-gap fit effect. This makes the turntable 2 more stable during rotation. Through the cooperation between the rolling element 4 and the limiting groove 21, the turntable 2 can limit its own rotation range by utilizing the travel of the rolling element 4 in the limiting groove 21. This limits the maximum opening and minimum closing posture of the aperture blades 3. The stable opening and closing of the aperture blades 3 benefits from the zero-gap stable rotation of the turntable 2, which is beneficial to improving the user's photographic imaging effect and improving the shooting quality.

[0028] Furthermore, in some embodiments, the limiting groove 21 has an inclined groove surface structure b, and the groove surface structure b forms an inclined angle c with the central axis of the turntable 2. The groove surface structure b forms a slope. When the groove surface structure b abuts against the rolling element 4, the axial and radial positions of the turntable 2 are restricted due to the point contact between the rolling element 4 and the groove surface structure b. The angle of the inclined angle c is in the range of 30 degrees to 60 degrees, and the inclined angle c is preferably 45 degrees, so that the axial and radial positions of the turntable 2 can be subjected to uniform force.

[0029] Furthermore, in some embodiments, the rolling element 4 may adopt a ball structure or a roller structure, preferably a ball structure. At least three rolling elements 4 are arranged circumferentially around the rotation axis e of the turntable 2, preferably three rolling elements 4 are evenly arranged circumferentially around the rotation axis e of the turntable 2. The same number of limiting grooves 21 as the rolling elements 4 are arranged circumferentially around the rotation axis e of the turntable 2 to correspond to the positions of the rolling elements 4. The three rolling elements 4 with the ball structure can form a stable contact structure with three-point support, which is more stable than the support method of two-point contact or four-point contact.

[0030] Example 2 Figures 1 to 7This embodiment provides a variable aperture structure with good stability, and also includes a driver 5 mounted on a fixed component 1. The output end of the driver 5 is fitted with a transmission component 6. A transmission structure 22 is provided on the outer periphery of the turntable 2. The transmission component 6 is connected to the transmission structure 22. The driver 5 drives the transmission component 6 to rotate synchronously, so that the transmission component 6 can drive the turntable 2 to rotate circumferentially relative to the fixed component 1 through the transmission structure 22.

[0031] Specifically, in this embodiment, the driver 5 is a miniature drive motor, the output end of the driver 5 is an output shaft structure, the transmission component 6 is a gear structure, and the transmission structure 22 is a gear tooth structure. Figure 6 The transmission component 6 is engaged with the transmission structure 22. The driver 5 is connected to an external power source to obtain power and drives the transmission component 6 to rotate synchronously using a key connection. The transmission component 6 engages with the transmission structure 22 and drives the turntable 2 to rotate circumferentially relative to the fixed component 1. This forms an automatic rotation of the turntable 2, which drives several aperture blades 3 to move to enlarge or shrink the adjustment hole a, thereby achieving precise adjustment of the aperture size.

[0032] Example 3 Figures 1 to 7 This embodiment provides a variable aperture structure with good stability, and also includes a magnetic attraction component 7 for stabilizing the stop position of the turntable 2. The magnetic attraction component 7 includes a first mating part 71 with magnetic force and a second mating part 72 that can be magnetically attracted. The first mating part 71 is installed on one of the fixed component 1 and the turntable 2, and the second mating part 72 is installed on the other of the fixed component 1 and the turntable 2. The second mating part 72 is located within the magnetic attraction range of the first mating part 71.

[0033] Specifically, based on Embodiment 1, a magnetic suction component 7 is used to further improve the rotational stability of the turntable 2. In this embodiment, both the first mating component 71 and the rolling component 4 are mounted on the fixing seat 11 of the fixing component 1 (i.e., as shown in the figure). Figure 4 As shown), the second mating part 72 is installed on the turntable 2 (i.e., as shown). Figure 6 As shown), the first mating part 71 and the second mating part 72 are spaced apart, with the distance between them being less than 1 mm, to ensure the stability of the magnetic adsorption. The first mating part 71 magnetically adsorbs the second mating part 72, causing the turntable 2 to be attracted and pressed against the surface of the rolling part 4, thus achieving zero-gap installation and stable circumferential rotation.

[0034] Furthermore, in some embodiments, the first mating member 71 is a sheet-like structure, and the second mating member 72 is an annular structure. At least three first mating members 71 are arranged circumferentially around the rotation axis e of the turntable 2. The annular structure has ring arms 73 whose radial dimensions gradually increase along the circumferential direction. The same number of ring arms 73 as the first mating members 71 are arranged circumferentially around the rotation axis e of the turntable 2, corresponding to the positions of the first mating members 71 (i.e., as shown in the figure). Figure 5 As shown in the figure, this enhances the stability of the turntable 2 against the surface of the rolling element 4, and avoids uneven force distribution caused by unilateral force, which affects the rotational stability.

[0035] Furthermore, in some embodiments, a driver 5 mounted on the fixed assembly 1 is also included. A transmission component 6 is mounted on the output end of the driver 5. A transmission structure 22 is provided on the outer periphery of the turntable 2. The transmission component 6 is connected to the transmission structure 22. The driver 5 drives the transmission component 6 to rotate synchronously, so that the transmission component 6 can drive the turntable 2 to rotate circumferentially relative to the fixed assembly 1 via the transmission structure 22. The driver 5 is a miniature drive motor, the output end of the driver 5 is an output shaft structure, the transmission component 6 is a gear structure, and the transmission structure 22 is a gear tooth structure. Based on this embodiment, a magnetic suction assembly 7 is used to further improve the rotational stability of the turntable 2. The first mating component 71 and the rolling component 4 are both mounted on the fixed seat 11 of the fixed assembly 1 (i.e., as shown in the image). Figure 4 As shown), the second mating part 72 is installed on the turntable 2 (i.e., as shown). Figure 6 As shown in the figure, the first mating part 71 magnetically attracts the second mating part 72, causing the turntable 2 to be attracted and pressed against the surface of the rolling part 4, which can effectively reduce the meshing backlash generated by the gear meshing transmission and further improve the positioning accuracy of the gear transmission.

[0036] Example 4 Figure 7 This embodiment provides a variable aperture structure with good stability. The guide structure includes a hinge post 31 for extending into the turntable 2 and a guide post 32 for extending into the fixing component 1. The fixing component 1 has a guide groove 14 for limiting the movement direction of the guide post 32. The guide groove 14 is circumferentially spaced around the rotation axis e of the turntable 2 and is radially inclined relative to the rotation axis e of the turntable 2.

[0037] Specifically, based on Embodiment 1, the aperture blade 3 is provided with a hinge post 31 and a guide post 32 on the front and back sides respectively. In this embodiment, the guide groove 14 is opened on the fixed cover 12. The hinge post 31 extends into the hinge hole of the turntable 2, so that the aperture blade 3 can rotate relative to the turntable 2. The guide post 32 extends into the guide groove 14 of the fixed cover 12, so that the aperture blade 3 can slide open or slide close along the extension direction of the guide groove 14. Combined with the rotation of the turntable 2, the adjustment hole a formed by several aperture blades 3 can be enlarged or reduced, thereby realizing the adjustment of the aperture size.

[0038] Furthermore, in some embodiments, the component (fixed base 11 or fixed cover 12) with the guide groove 14 may be provided with a dustproof film 8 on its outer side to prevent external debris from entering the guide groove 14. The dustproof film 8 has a fourth through hole 104 coaxial with the third through hole 103 to ensure the opening and closing accuracy of the variable aperture structure.

[0039] Example 5 This embodiment provides a variable aperture structure with good stability. Unlike the first embodiment, the aperture blades 3 in this embodiment can also be movably connected to the fixed base 11.

[0040] Example 6 This embodiment provides a variable aperture structure with good stability. Unlike embodiment two, the transmission component 6 in this embodiment can also be a pulley structure, the transmission structure 22 is a gear structure, the driver 5 is connected to an external power source to obtain power, or a spline connection can be used to drive the transmission component 6 to rotate synchronously. The transmission component 6 drives the transmission structure 22 to rotate the turntable 2 relative to the fixed component 1 through the synchronous belt, so that the turntable 2 rotates automatically and drives several aperture blades 3 to move to enlarge or shrink the adjustment hole a, so as to achieve precise adjustment of the aperture size.

[0041] Example 7 This embodiment provides a variable aperture structure with good stability. Unlike embodiments three and four, in this embodiment, the first mating part 71 is a ring-shaped structure, and the second mating part 72 is a sheet-shaped structure. The second mating part 72 and the rolling part 4 can also be installed on the fixing cover 12 (not shown) of the fixing component 1. The first mating part 71 is installed on the turntable 2 (not shown), and the guide groove 14 can also be opened on the fixing seat 11. The aperture blades are movably connected between the fixing seat 11 and the turntable 2. The first mating part 71 magnetically attracts the second mating part 72, causing the turntable 2 to be affected by the attraction and press against the surface of the rolling part 4, realizing zero-gap installation and stable circumferential rotation.

[0042] Example 8 This embodiment provides a variable aperture structure with good stability. Unlike embodiment four, the guide groove 14 in this embodiment can also be formed on the fixed base 11.

[0043] The above examples are merely illustrative of the technical content of the present invention to facilitate easier understanding by the reader, but do not imply that the implementation of the present invention is limited to these examples. Any technical extensions or re-creations made based on the present invention are protected by the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A variable aperture structure with good stability, comprising a fixing component (1), the fixing component (1) comprising a fixing seat (11) having a first through hole (101) and a fixing cover (12) having a second through hole (102), the fixing cover (12) being detachably mounted on the fixing seat (11), a rotatable turntable (2) and a plurality of aperture blades (3) being mounted between the fixing seat (11) and the fixing cover (12), the turntable (2) having a third through hole (103), the first through hole (101), the second through hole (102) and the third through hole (103) being coaxially arranged, the aperture blades (3) being movably connected to the turntable (2) through a guide structure, characterized in that: It also includes a rolling element (4) disposed between the fixed component (1) and the turntable (2) in a point contact manner. The fixed component (1) has a limiting recess (13) for accommodating the rolling element (4). The turntable (2) has a limiting groove (21) for cooperating with the rolling element (4). The limiting groove (21) adopts an arc-shaped structure and extends in the circumferential direction around the rotation axis e of the turntable (2). A plurality of aperture blades (3) are arranged to form an adjustable aperture a. When the turntable (2) rotates, it drives the plurality of aperture blades (3) to move to enlarge or shrink the adjustable aperture a.

2. The variable aperture structure with good stability as described in claim 1, characterized in that: It also includes a driver (5) installed on the fixed component (1), and a transmission component (6) is installed at the output end of the driver (5). A transmission structure (22) is provided on the outer periphery of the turntable (2). The transmission component (6) is connected to the transmission structure (22). The driver (5) drives the transmission component (6) to rotate synchronously, so that the transmission component (6) can drive the turntable (2) to rotate circumferentially relative to the fixed component (1) via the transmission structure (22).

3. The variable aperture structure with good stability as described in claim 2, characterized in that: The driver (5) is a drive motor, the output end of the driver (5) is an output shaft structure, the transmission component (6) is a gear structure, the transmission structure (22) is a gear tooth structure, and the transmission component (6) meshes with the transmission structure (22).

4. The variable aperture structure with good stability as described in claim 1, characterized in that: It also includes a magnetic attraction component (7) for stabilizing the stop position of the turntable (2). The magnetic attraction component (7) includes a first mating part (71) with magnetic force and a second mating part (72) that can be magnetically attracted. The first mating part (71) is installed on one of the fixed component (1) and the turntable (2), and the second mating part (72) is installed on the other of the fixed component (1) and the turntable (2). The second mating part (72) is located within the magnetic attraction range of the first mating part (71).

5. The variable aperture structure with good stability as described in claim 4, characterized in that: The first mating part (71) is a sheet-like structure, and the second mating part (72) is a ring-like structure.

6. The variable aperture structure with good stability as described in claim 5, characterized in that: At least three of the first mating parts (71) are arranged circumferentially around the rotation axis e of the turntable (2). The annular structure has ring arms (73) whose radial dimensions gradually increase along the circumferential direction. The same number of ring arms (73) as the first mating parts (71) are arranged circumferentially around the rotation axis e of the turntable (2) at positions corresponding to the first mating parts (71).

7. A variable aperture structure with good stability as described in any one of claims 1-6, characterized in that: The guide structure includes a hinge post (31) for extending into the turntable (2) and a guide post (32) for extending into the fixing component (1). The fixing component (1) has a guide groove (14) for limiting the movement direction of the guide post (32). The guide groove (14) is circumferentially spaced around the rotation axis e of the turntable (2) and is radially inclined relative to the rotation axis e of the turntable (2).

8. A variable aperture structure with good stability as described in any one of claims 1-6, characterized in that: The limiting groove (21) has an inclined groove surface structure b, and the groove surface structure b forms an inclined angle c with the central axis of the turntable (2), the angle of the inclined angle c being in the range of 30 degrees to 60 degrees.

9. A variable aperture structure with good stability as described in any one of claims 1-6, characterized in that: The rolling element (4) is a ball structure or a roller structure. At least three rolling elements (4) are arranged circumferentially around the rotation axis e of the turntable (2). The same number of limiting grooves (21) corresponding to the position of the rolling element (4) are arranged circumferentially around the rotation axis e of the turntable (2).

10. A photographic device, characterized in that: Including a variable aperture structure with good stability as described in any one of claims 1-9.

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