Dimmer

Abstract

The light reducing mirror comprises a rotating ring piece, an adapter ring piece and a fixed ring piece, the rotating ring piece is embedded in the adapter ring piece, the adapter ring piece is embedded in the fixed ring piece, the side wall of the adapter ring piece is provided with a limiting piece and a first screw hole, the side wall of the fixed ring piece is provided with a second screw hole corresponding to the first screw hole, and the limiting piece is embedded in the second screw hole. According to the dimmer, the situation that when a user rotates the rotary ring piece, the applied force is too large, then the adapter ring piece and even the fixed ring piece are driven to rotate together, the relative angle relation between polarized lenses is damaged, and the stability and accuracy of the polarization effect are affected can be avoided; the fixing relation between the rotating ring piece and the adapter ring piece is flexibly changed by screwing or unscrewing the fastening piece, a user can conveniently and flexibly decide whether to independently rotate the rotating ring piece or rotate the rotating ring piece and the adapter ring piece in a linkage mode according to actual requirements, and the use requirements of the user in different scenes are met.

Description

Technical Field

[0001] This utility model relates to the field of photographic equipment technology, specifically to a neutral density filter. Background Technology

[0002] Neutral density (ND) filters are commonly used photographic equipment, applied to camera lenses to reduce the amount of light entering the lens. However, existing ND filters suffer from defects such as color cast, spectral instability, and uneven light reduction. Using different levels of ND requires changing filters of the corresponding level, which is inconvenient and prone to vignetting. With technological advancements, adjustable ND filters have been developed, comprising a rotating ring, a fixed ring, and an adapter ring. The rotating ring and adapter ring are magnetically attracted, and the adapter ring is then magnetically attracted to the fixed ring. The fixed ring is screwed onto the lens via a threaded structure. The rotating ring has a first polarizing filter, and the fixed ring or adapter ring has a second polarizing filter. In use, simply rotating the rotating ring changes the relative angle of the two polarizing filters to achieve continuously adjustable polarization, eliminating the need for frequent filter changes. However, this adjustable ND filter also has a drawback: if the user applies excessive force when rotating the rotating ring, it may cause the adapter ring or even the fixed ring to rotate as well, thereby disrupting the relative angle relationship between the polarizing filters and affecting the stability and accuracy of the polarization effect. Utility Model Content

[0003] To solve the above problems, this utility model provides a neutral density filter, including a rotating ring, a connecting ring, and a fixed ring. The rotating ring is nested on the connecting ring, and the connecting ring is nested on the fixed ring. The connecting ring has a limiting member and a first screw hole on its side wall, and the fixed ring has a second screw hole corresponding to the first screw hole on its side wall. Fasteners are screwed to the first screw hole and the second screw hole in sequence, and the limiting member is arranged around the fastener.

[0004] Preferably, the rotating ring component includes a first outer ring U-shaped groove and a first stepped surface, the first outer ring U-shaped groove being located on the back side of the first stepped surface; the transition ring component includes a second stepped surface, a third stepped surface, a fourth stepped surface, and a fifth stepped surface arranged sequentially from top to bottom, the second stepped surface being located below the actuating protrusion, the bottom of the second stepped surface having a first inner ring U-shaped groove, the lower part of the outer wall of the first inner ring U-shaped groove having an annular notch, the third stepped surface engaging with the first outer ring U-shaped groove, and the connecting sidewall between the fourth and fifth stepped surfaces extending outward to form a first annular boss. Located on the back of the fifth step surface; the fixing ring includes a sixth step surface, a seventh step surface, and an eighth step surface arranged sequentially from top to bottom. A second annular boss extends upward from the seventh step surface. The second annular boss is inserted into the first inner ring U-shaped groove. A second outer ring U-shaped groove is formed between the second annular boss and the sixth step surface. The outer wall of the first inner ring U-shaped groove is inserted into the second outer ring U-shaped groove. The sixth step surface mates with an annular notch. A second inner ring U-shaped groove is provided on the connecting side wall between the seventh step surface and the eighth step surface. The second inner ring U-shaped groove mates with the first annular boss.

[0005] Preferably, the rotating ring is provided with an integrally formed actuating protrusion, and the second step surface is provided with an integrally formed arc-shaped notch. The actuating protrusion is placed on the arc-shaped notch and can rotate along the arc-shaped notch.

[0006] Preferably, a first polarizing lens is provided on the first step surface.

[0007] Preferably, a second polarizing lens is provided on the fifth step surface.

[0008] Preferably, the surface of the first polarizing lens is coated with a nano-silica coating.

[0009] Preferably, the surface of the second polarizing lens is provided with a multilayer antireflective coating.

[0010] Preferably, a sealing ring is provided in the first outer ring U-shaped groove, the second outer ring U-shaped groove, the first inner ring U-shaped groove, and the second inner ring U-shaped groove.

[0011] Preferably, the rotating ring, the transition ring, and the fixed ring are made of any one of the following materials: copper, iron, aluminum alloy, stainless steel, or carbon fiber.

[0012] Preferably, the rotating ring is provided with a pressure ring, which is made of ferromagnetic or magnetic material.

[0013] The beneficial effects are as follows: The neutral density filter provided by this application can avoid the user applying too much force when rotating the rotating ring, which would cause the adapter ring or even the fixed ring to rotate together, thereby destroying the relative angle relationship between the polarizing lenses and affecting the stability and accuracy of the polarization effect. By tightening or loosening the fasteners, the fixing relationship between the rotating ring and the adapter ring can be flexibly changed, allowing the user to flexibly decide whether to rotate the rotating ring alone or rotate the rotating ring and the adapter ring together according to actual needs, meeting the user's needs in different scenarios. At the same time, in order to prevent the fasteners from falling off or being lost, a limiting component is also provided above the fasteners. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0017] Figure 3 This is a cross-sectional view of the present invention;

[0018] Figure 4 Cross-sectional view of the rotating ring component of this utility model Figure 1 Enlarged view of the end;

[0019] Figure 5 Cross-sectional view of the fixing ring component of this utility model Figure 1 Enlarged view of the end;

[0020] Figure 6 Cross-sectional view of the adapter ring of this utility model Figure 1 Enlarged view of the end;

[0021] In the picture:

[0022] 1. Rotating ring component; 11. Actuating convex piece; 12. First outer ring U-shaped groove; 13. First stepped surface;

[0023] 2. Adapter ring; 21. Arc-shaped notch; 22. Second step surface; 221. First inner ring U-shaped groove; 222. Annular notch; 23. Third step surface; 24. Fourth step surface; 241. First annular boss; 25. Fifth step surface; 26. Limiting component;

[0024] 3. Fixing ring; 31. Sixth step surface; 32. Seventh step surface; 321. Second annular boss; 322. Second outer ring U-shaped groove; 33. Eighth step surface; 331. Second inner ring U-shaped groove; 34. Fastener. Detailed Implementation

[0025] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0026] It should be noted that all directional indicators in this utility model embodiment, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0028] Example

[0029] Please see Figures 1 to 3 , Figure 1 This is a schematic diagram of the overall structure of this utility model. Figure 2 This is a schematic diagram of the exploded structure of this utility model. Figure 3This is a cross-sectional view of the present invention. This embodiment provides a neutral density filter, including a rotating ring 1, a connecting ring 2, and a fixing ring 3. The rotating ring 1, the connecting ring 2, and the fixing ring 3 can be made of any of the following materials: copper, iron, aluminum alloy, stainless steel, or carbon fiber. It is preferred to make them of aluminum alloy or carbon fiber to reduce the overall weight of the neutral density filter. Rotating ring 1 is nested on adapter ring 2, and adapter ring 2 is nested on fixed ring 3. The side wall of adapter ring 2 is provided with a limiting member 26 and a first screw hole. The side wall of fixed ring 3 is provided with a second screw hole corresponding to the first screw hole. Fastener 34 is screwed into the first screw hole and the second screw hole in sequence. The limiting member 26 is positioned above the fastener 34. The distance between the bottom of the limiting member 26 and the top of the fastener 34 should be less than the sum of the depths of the first and second screw holes. Simultaneously, the distance between the bottom of the limiting member 26 and the top of the fastener 34 should be at least 2mm. This ensures that the fastener 34 has room to move without completely coming loose from the screw holes. When the fastener 34 is unscrewed from the first and second screw holes, the limiting member 26 prevents the fastener 34 from completely detaching from the screw holes, thus preventing it from falling or being lost. The limiting member 26 provides operating space on both sides of the fastener 34 for tightening the fastener 34.

[0030] The neutral density filter provided in this embodiment can flexibly change the fixing relationship between the rotating ring 1 and the adapter ring 2 by tightening or loosening the fasteners. This allows users to flexibly decide whether to rotate the rotating ring 1 alone or rotate both the rotating ring 1 and the adapter ring 2 together according to actual needs, meeting the user's needs in different scenarios. For example, when fine adjustment of the polarization angle is required in a strong light environment, only the rotating ring 1 can be moved; when changing the filter group, the rotating ring 1 and the adapter ring 2 can be rotated as a whole; when only the rotating ring 1 needs to be rotated, simply tighten the fastener 34 to lock the adapter ring 2 and the fixed ring 3. Since the fixed ring 3 is fixed to the lens, after the adapter ring 2 and the fixed ring 3 are locked, the positions of the adapter ring 2, the fixed ring 3, and the lens are all relatively fixed. At this time, rotating the rotating ring 1 can achieve rotation relative to the fixed ring 3 to complete the adjustment of the neutral density; if you want the rotating ring 1 and the adapter ring 2 to rotate together relative to the fixed ring 3, simply loosen the fastener 34.

[0031] Please see Figures 4 to 6 Please refer to the following together. Figure 3 , Figure 4 A cross-sectional view of the rotating ring component 1 of this utility model. Figure 1 Enlarged view of the end. Figure 5 3-section view of the fixing ring component of this utility model Figure 1 Enlarged view of the end. Figure 6 2. Cross-sectional view of the adapter ring of this utility model Figure 1Enlarged view of the end. The rotating ring 1 includes a first outer ring U-shaped groove 12 and a first stepped surface 13. A first polarizing lens is provided on the first stepped surface 13. The first polarizing lens can be glued or fixed to the first stepped surface 13 by means of a pressure ring, etc. The pressure ring is made of ferromagnetic or magnetic material for magnetic filters. The surface of the first polarizing lens is coated with a nano-silica coating to reduce the risk of scratching the first polarizing lens. The first outer ring U-shaped groove 12 is located on the back of the first stepped surface 13. The adapter ring 2 includes a second stepped surface 22, a third stepped surface 23, a fourth stepped surface 24 and a fifth stepped surface 25 arranged sequentially from top to bottom. The fifth stepped surface 25 is provided with a second polarizing lens. The second polarizing lens can be fixed to the fifth stepped surface 25 by means of glue, snap-fit ​​or welding, etc. The surface of the second polarizing lens is provided with a multi-layer anti-reflection film to reduce light reflection loss. The second stepped surface 22 is located below the actuating protrusion 11. The bottom of the second stepped surface 22 is provided with a first inner ring U-shaped groove 221. The outer wall of 221 has an annular notch 222 below it. The third step surface 23 mates with the first outer ring U-shaped groove 12. The connecting sidewall between the fourth step surface 24 and the fifth step surface 25 extends outward to form a first annular boss 241. The first annular boss 241 is located on the back of the fifth step surface 25. The fixing ring 3 includes a sixth step surface 31, a seventh step surface 32 and an eighth step surface 33 arranged sequentially from top to bottom. The seventh step surface 32 extends upward to form a second annular boss 321. The second annular boss 321 is inserted into the first inner ring U-shaped groove 221. The second annular boss 321 and the sixth step surface 31 form a second outer ring U-shaped groove 322. The outer wall of the first inner ring U-shaped groove 221 is inserted into the second outer ring U-shaped groove 322. The sixth step surface 31 mates with the annular notch 222. The connecting sidewall between the seventh step surface 32 and the eighth step surface 33 has a second inner ring U-shaped groove 331. The second inner ring U-shaped groove 331 mates with the first annular boss 241. Sealing rings are provided in the first outer ring U-shaped groove 12, the second outer ring U-shaped groove 322, the first inner ring U-shaped groove 221, and the second inner ring U-shaped groove 331. These seals prevent dust and moisture from entering the optical cavity and improve the rotation feel. Radial movement is restricted by the engagement of the third stepped surface 23 with the first outer ring U-shaped groove 12 and the first annular boss 241 with the second inner ring U-shaped groove 331, ensuring optical axis alignment. Axial positioning is achieved by the engagement of the sixth stepped surface 31 with the annular notch 222 and the second annular boss 321 with the first inner ring U-shaped groove 221. The nested connection achieved through the interplay of these multiple stepped surfaces, U-shaped grooves, and annular bosses creates a multi-level mechanical fit, improving assembly precision. This design not only makes the neutral density filter structure more stable, ensuring that the polarizing lens will not easily shift or wobble during use, thus guaranteeing the stability and accuracy of the polarization effect, but also facilitates the disassembly and assembly of each component.

[0032] See also Figure 2 The outer wall of the first inner ring U-shaped groove 221 is provided with a limiting member 26 and a first screw hole. The side wall of the second annular boss 321 is provided with a second screw hole corresponding to the first screw hole. The fastener 34 is screwed into the first screw hole and the second screw hole in sequence. The limiting member 26 is arranged around the fastener 34, leaving operating space on both sides of the fastener 34 for tightening the fastener 34. By cooperating with the fastener 34 and the first and second screw holes, the fixing relationship between the rotating ring 1 and the adapter ring 2 can be flexibly changed, allowing the user to decide whether to rotate the rotating ring 1 alone or rotate the rotating ring 1 and the adapter ring 2 together according to actual needs, meeting the user's needs in different scenarios. The limiting member 26 can prevent the fastener 34 from completely disengaging, thereby preventing it from falling or being lost.

[0033] See also Figure 1 and Figure 2 The rotating ring 1 has an integrally formed actuating protrusion 11, and the second step surface 22 has an integrally formed arc-shaped notch 21. The actuating protrusion 11 is placed on the arc-shaped notch 21 and can rotate along the arc-shaped notch 21. The actuating protrusion 11 on the rotating ring 1 cooperates with the arc-shaped notch 21 on the adapter ring 2, so that the rotating ring 1 can rotate relative to the adapter ring 2 and the fixed ring 3, thereby realizing the adjustment of the light transmission of the neutral density filter. The operation is relatively simple, and the arc-shaped notch 21 can limit the rotation range and avoid excessive rotation that could cause structural damage.

[0034] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A dimmer mirror characterized in that, The utility model relates to a rotating ring, adapter ring and fixed ring, the rotating ring is nested on the adapter ring, the adapter ring is nested on the fixed ring, the adapter ring side wall is equipped with limiting piece and first screw hole, the fixed ring side wall is equipped with the second screw hole with first screw hole corresponds, fastener is in turn with first screw hole, second screw hole screw joint, limiting piece ring is equipped with above fastener.

2. A shade according to claim 1, characterised in that The rotating ring includes a first outer ring U-shaped groove and a first step surface, the first outer ring U-shaped groove is arranged on the back of the first step surface; the adapter ring includes a second step surface, a third step surface, a fourth step surface and a fifth step surface arranged from top to bottom, the second step surface is arranged below the actuating tab, the first inner ring U-shaped groove is arranged on the bottom of the second step surface, the annular notch is arranged below the outer wall of the first inner ring U-shaped groove, the third step surface is matched with the first outer ring U-shaped groove, the connecting side wall between the fourth step surface and the fifth step surface extends outward to form a first annular boss, the first annular boss is arranged on the back of the fifth step surface; the fixed ring includes a sixth step surface, a seventh step surface and an eighth step surface arranged from top to bottom, the seventh step surface extends upward to form a second annular boss, the second annular boss is inserted into the first inner ring U-shaped groove, the second annular boss and the sixth step surface form a second outer ring U-shaped groove, the outer wall of the first inner ring U-shaped groove is inserted into the second outer ring U-shaped groove, the sixth step surface is matched with the annular notch, the second inner ring U-shaped groove is arranged on the connecting side wall between the seventh step surface and the eighth step surface, and the second inner ring U-shaped groove is matched with the first annular boss.

3. A shade according to claim 2, wherein The rotating ring is provided with an integrally formed actuating tab, the second step surface is provided with an integrally formed arc-shaped notch, the actuating tab is arranged on the arc-shaped notch and can rotate along the arc-shaped notch.

4. The light attenuating mirror of claim 2, wherein, The first step surface is provided with a first polarizing lens.

5. The light attenuating mirror of claim 2, wherein, The fifth step surface is provided with a second polarizing lens.

6. The light attenuating mirror of claim 4, wherein, The surface of the first polarizing lens is coated with a nano-silicon dioxide coating.

7. The light attenuating mirror of claim 5, wherein, The surface of the second polarizing lens is provided with a plurality of anti-reflection films.

8. The light attenuating mirror of claim 2, wherein, The first outer ring U-shaped groove, the second outer ring U-shaped groove, the first inner ring U-shaped groove and the second inner ring U-shaped groove are all provided with sealing rings.

9. The light attenuating mirror of claim 2, wherein, The rotating ring, the adapter ring and the fixed ring are made of any one of copper, iron, aluminum alloy, stainless steel or carbon fiber.

10. The light attenuating mirror of claim 2, wherein, The rotating ring is provided with a compression ring made of ferromagnetic or magnet material.

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