A filter system for a petaloid lens hood lens

Abstract

The utility model relates to a kind of filter systems for lens with lotus petal type lens hood, including connection seat and one above filter that are sequentially magnetically attracted and stacked in the front end of connection seat;The connection seat is circular ring, and its inner side surface is equipped with one above limiting portion, each The limiting portion is clamped on the recess between the two petal-shaped edges of lotus petal type lens hood, and the connection seat assembled to the front end of lens is limited in circumferential direction and front-back direction;The rear end of the connection seat has the hoop of integrated connection, and the hoop is sleeved on lens, and the connection seat is locked on lens.By setting limiting portion, the connection seat assembled to the front end of lens is limited in circumferential direction and front-back direction, ensure that the position of filter system is consistent in front-back direction when assembling to lens each time, ensure the assembly stability and reliability of filter system and lens.

Description

Technical Field

[0001] This utility model belongs to the field of photographic equipment technology, and specifically relates to a filter system for lenses with lotus petal-shaped lens hoods. Background Technology

[0002] For optical design purposes, some ultra-wide-angle lenses come with a lotus petal-shaped lens hood, allowing effective light to enter while blocking stray light. However, the applicant has discovered the following defects in existing filter systems when mounted with lotus petal-shaped lens hoods: 1. Traditional filter systems rely solely on the clamps on the adapter rings to lock the filter at the front of the lens. This locking stability is poor, and the filter is prone to loosening or rotating, which affects the filter effect and can easily scratch the lens surface.

[0003] 2. Traditional filter systems are difficult to keep in consistent position in the front-to-back direction each time they are assembled onto a lens, and they are prone to collisions with the filter elements, causing damage to the filter or lens.

[0004] 3. Traditional filter systems use threaded structures to assemble filters with a connecting ring and another filter, which is time-consuming and inconvenient to install and disassemble. Utility Model Content

[0005] To address at least one of the aforementioned problems in the prior art, this utility model provides a filter system for a lens with a lotus petal-shaped lens hood.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention discloses a filter system for a lens with a lotus petal-shaped lens hood, comprising a connecting base and one or more filters magnetically stacked sequentially at the front end of the connecting base; wherein, the connecting base is annular, and its inner surface is provided with one or more limiting parts, each of the limiting parts being engaged with a recess between two petal-shaped edges of the lotus petal-shaped lens hood, thereby limiting the connecting base assembled to the front end of the lens in the circumferential and front-back directions; the rear end of the connecting base has an integrally connected hoop, which is fitted onto the lens to lock the connecting base onto the lens.

[0007] In one embodiment of this utility model, the number of limiting parts is the same as the number of recesses on the lotus petal-shaped light shield, and they are locked onto the recesses one by one in a corresponding manner.

[0008] In one embodiment of this utility model, the limiting part includes a limiting seat and a limiting post. The limiting seat is connected to the inner surface of the connecting seat, and one end of the limiting post is connected to the limiting seat, while the other end faces the center of the connecting seat.

[0009] In one embodiment of this utility model, the limiting post is a cylinder and is integrally connected with the limiting part and the connecting seat.

[0010] In one embodiment of this utility model, the limiting seat has an assembly hole at one end facing the center of the connecting seat, and the limiting post has an assembly foot at one end, which is installed in the assembly hole.

[0011] In one embodiment of this utility model, the front end of the connecting seat has a forward-extending magnetic connecting ring, and a first magnetic block is embedded in the outer or inner circumferential surface of the magnetic connecting ring; a second magnetic block is provided in the filter frame of the filter, so that the front and rear ends of the filter respectively form a front magnetic end and a rear magnetic end, the rear magnetic end is magnetically connected to the magnetic connecting ring, and the front magnetic end is magnetically connected to the rear magnetic end of another filter stacked at the front end of the filter.

[0012] In one embodiment of this utility model, the first magnetic block of the magnetic connecting ring and the second magnetic block in the filter frame are both provided in two or more forms, and both are arc-shaped and arranged in a ring array. When the filter is assembled to the connecting seat, the first magnetic block of the magnetic connecting ring and the second magnetic block of the filter frame attract each other and form a circle.

[0013] In one embodiment of this utility model, the inner surface of the magnetic connecting ring is provided with two or more protruding first locking edges. The first locking edges are arc-shaped and extend along the inner circumferential surface of the magnetic connecting ring, forming a ring array. The outer circumferential surface of the rear magnetic end of the filter frame is provided with two or more protruding second locking edges. The second locking edges are arc-shaped and extend along the outer circumferential surface of the rear magnetic end in a ring array. When the filter is assembled to the connector, the first locking edge and the second locking edge are engaged with each other by rotating the filter to complete the assembly. During the rotation of the filter, each second magnetic block in the filter frame is magnetically connected to at least one first magnetic block of the connector.

[0014] In one embodiment of this utility model, the front magnetic end face of the filter frame is provided with a forward-protruding limiting ring, and the inner circumferential surface of the limiting ring is provided with two or more protruding third locking edges. The third locking edges are arc-shaped and extend along the inner circumferential surface of the front magnetic end in a ring array. When another filter is stacked on the front end of the filter, the rear magnetic end of the other filter is located inside the limiting ring. By rotating the other filter, the first locking edge and the third locking edge are engaged with each other to complete the assembly. Moreover, during the rotation of the filter, each second magnetic block in the two filter frames is magnetically connected to at least one second magnetic block of the other.

[0015] In one embodiment of this invention, an elastic pad is provided on the inner surface of the hoop, and the elastic pad is connected to the surface of the lens.

[0016] The beneficial effects of this utility model are: Compared with the prior art, the present invention, through the above technical solution, can limit the connecting seat assembled to the front end of the lens in both the circumferential and front-back directions, ensuring that the position of the filter system in the front-back direction remains consistent each time it is assembled onto the lens, thus guaranteeing the assembly stability and reliability of the filter system and the lens. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the filter system for a lens with a lotus petal-shaped lens hood as described in an embodiment of the present invention; Figure 2 This is a rear view structural diagram of the filter in the filter system for a lens with a lotus petal-shaped lens hood as described in this embodiment of the present invention; Figure 3 This is a front view structural diagram of the connector in the filter system for a lens with a lotus petal-shaped lens hood, as described in an embodiment of this utility model. Figure 4 This is a rear view structural diagram of the connecting seat in the filter system for a lens with a lotus petal-shaped lens hood, as described in an embodiment of this utility model. Figure 5 This is a schematic diagram of the assembly structure of the connecting seat and the lens in the filter system for a lens with a lotus petal-shaped lens hood, as described in an embodiment of this utility model. Figure 6 This is a schematic diagram of the structure of the filter system for a lens with a lotus petal-shaped lens hood, as described in an embodiment of this utility model, assembled onto the lens.

[0018] Explanation of reference numerals in the attached figures: 100. Connecting seat; 101. Limiting part; 102. Hoop; 103. Limiting seat; 104. Limiting post; 105. Magnetic connecting ring; 106. First magnetic block; 107. First locking edge; 108. Elastic pad. 200. Filter; 201. Filter frame; 202. Front magnetic end; 203. Rear magnetic end; 204. Second locking edge; 205. Limiting ring; 206. Third locking edge. 300. Lens; 301. Lotus petal-shaped lens hood; 302. Recessed part. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0020] like Figure 1-6 As shown in the figure, the filter system for a lens with a lotus petal-shaped lens hood according to the present invention includes a connector 100 and one or more filters 200, wherein the filters 200 are magnetically stacked on the front end of the connector 100 in sequence.

[0021] The connecting seat 100 is annular, with an integrally connected hoop 102 at its rear end. The hoop 102 is fitted onto the lens 300, locking the connecting seat 100 onto the lens 300. The inner surface of the connecting seat 100 has one or more limiting parts 101. Each limiting part 101 engages with a recess 302 between two petal-shaped edges of the lotus petal-shaped lens hood 301, limiting the connecting seat 100 assembled to the front end of the lens 300 in both the circumferential and longitudinal directions. This ensures that the filter system (connecting seat 100) maintains a consistent position in the longitudinal direction each time it is assembled onto the lens 300. Simultaneously, in conjunction with the hoop 102, it guarantees the assembly stability and reliability of the filter system and the lens 300. Preferably, the number of limiting parts 101 is the same as the number of recesses 302 on the lotus petal-shaped lens hood 301, and they are engaged with the recesses 302 in a one-to-one correspondence. Specifically, it has four limiting parts 101 arranged in a ring array; the lotus petal-shaped light shield 301 has four recesses 302, and the four limiting parts 101 are correspondingly locked in the four recesses 302.

[0022] like Figure 1-5 As shown, the limiting part 101 of this utility model includes a limiting seat 103 and a limiting post 104. The limiting seat 103 is connected to the inner surface of the connecting seat 100. One end of the limiting post 104 is connected to the limiting seat 103, and the other end faces the center of the connecting seat 100. The limiting post 104 is a cylinder and is integrally connected to the limiting part 101 and the connecting seat 100. Specifically, the limiting seat 103 has an assembly hole (not shown in the figure) at one end facing the center of the connecting seat 100, and the limiting post 104 has an assembly foot (not shown in the figure) at one end. The assembly foot is installed in the assembly hole; for example, the assembly hole is an internal threaded hole, and the assembly foot is a threaded rod that matches the internal threaded hole.

[0023] For example Figure 1-6As shown, the front end of the connector 100 of this utility model has a forward-extending magnetic connecting ring 105. A first magnetic block 106 is embedded in the outer circumferential surface (or the inner circumferential surface) of the magnetic connecting ring 105. A second magnetic block (not shown in the figure) is provided in the filter frame 201 of the filter 200, so that the front and rear ends of the filter 200 respectively form a front magnetic end 202 and a rear magnetic end 203. The first magnetic block 106 of the magnetic connecting ring 105 and the second magnetic block in the filter frame 201 are both two or more, and both are arc-shaped, arranged in a ring array. During assembly, the rear magnetic end 203 is magnetically connected to the magnetic connecting ring 105, and the front magnetic end 202 is magnetically connected to the rear magnetic end 203 of another filter 200 stacked at the front end of the filter 200. Installation and disassembly are simple, convenient, and quick.

[0024] Furthermore, when the filter 200 is assembled onto the connector 100, the first magnetic block 106 of the magnetic connecting ring 105 and the second magnetic block of the filter frame 201 magnetically attract each other and form a circle, resulting in a stable and reliable magnetic connection.

[0025] like Figure 1 , 2 As shown in Figures 3 and 5, the inner surface of the magnetic connecting ring 105 of the filter system of this utility model is provided with two or more protruding first locking edges 107. The first locking edges 107 are arc-shaped and extend along the inner circumferential surface of the magnetic connecting ring 105 in a ring array. Simultaneously, the outer circumferential surface of the rear magnetic end 203 of the filter frame 201 is provided with two or more protruding second locking edges 204. The second locking edges 204 are arc-shaped and extend along the outer circumferential surface of the rear magnetic end 203 in a ring array. When the filter 200 is assembled to the connector 100, the first locking edge 107 and the second locking edge 204 are engaged one by one by rotating the filter 200, thus completing the assembly. This further improves the stability of the assembly between the filter 200 and the connector 100 and completely avoids the risk of the filter 200 falling off during use. Moreover, during the process of rotating the filter 200 when installing and removing it, each second magnet in the filter frame 201 is magnetically connected to at least one first magnet 106 of the connector 100, which improves the safety of operation.

[0026] Similarly, the front magnetic end 202 of the filter frame 201 is provided with a forward-protruding limiting ring 205. The inner circumferential surface of the limiting ring 205 is provided with two or more protruding third locking edges 206. The third locking edges 206 are arc-shaped and extend along the inner circumferential surface of the limiting ring 205 in a ring array. When another filter 200 is stacked on the front end of the filter 200, the rear magnetic end 203 of the other filter 200 is located inside the limiting ring 205. By rotating the other filter 200, the first locking edge 107 is engaged with the third locking edge 206 of the assembled filter 200 one by one, thus completing the assembly. Moreover, during the rotation of the filter 200, each second magnetic block in the two filter frames 201 is magnetically connected to at least one second magnetic block of the other, improving the safety of operation.

[0027] like Figure 1 , 4 As shown, the inner surface of the clamp 102 is provided with an elastic pad 108, which can be one of a rubber pad, a silicone pad, or a foam pad. When the filter system (connector 100) is assembled onto the lens 300, the elastic pad 108 is connected to the surface of the lens 300. By setting this elastic pad 108, the locking performance of the clamp 102 on the lens 300 is improved, and the risk of scratching the surface of the lens 300 is avoided.

[0028] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A filter system for a lens with a lotus petal-shaped lens hood, characterized in that, The device includes a connector (100) and one or more filters (200) magnetically stacked at the front end of the connector (100); wherein the connector (100) is annular, and its inner surface is provided with one or more limiting parts (101), each of the limiting parts (101) is engaged in the recess (302) between the two petal-shaped edges of the lotus petal-shaped light shield (301), thereby limiting the connector (100) assembled to the front end of the lens (300) in the circumferential and front-back directions; the rear end of the connector (100) has an integral hoop (102), which is fitted onto the lens (300) to lock the connector (100) onto the lens (300).

2. The filter system for a lens with a lotus petal-shaped lens hood according to claim 1, characterized in that, The number of limiting parts (101) is the same as the number of recesses (302) on the lotus petal-shaped light shield (301), and they are locked onto the recesses (302) one by one.

3. The filter system for a lens with a lotus petal-shaped lens hood according to claim 1 or 2, characterized in that, The limiting part (101) includes a limiting seat (103) and a limiting post (104). The limiting seat (103) is connected to the inner surface of the connecting seat (100). One end of the limiting post (104) is connected to the limiting seat (103), and the other end is facing the center of the connecting seat (100).

4. The filter system for a lens with a lotus petal-shaped lens hood according to claim 3, characterized in that, The limiting post (104) is a cylinder and is integrated with the limiting part (101) and the connecting seat (100).

5. The filter system for a lens with a lotus petal-shaped lens hood according to claim 4, characterized in that, The limiting seat (103) has an assembly hole at one end facing the center of the connecting seat (100), and the limiting post (104) has an assembly foot at one end, which is installed in the assembly hole.

6. The filter system for a lens with a lotus petal-shaped lens hood according to any one of claims 1, 2, 4, and 5, characterized in that, The front end of the connector (100) has a forward-extending magnetic connecting ring (105), and a first magnetic block (106) is embedded on the outer or inner circumferential surface of the magnetic connecting ring (105); a second magnetic block is provided in the filter frame (201) of the filter (200), so that the front and rear ends of the filter (200) respectively form a front magnetic end (202) and a rear magnetic end (203). The rear magnetic end (203) is magnetically connected to the magnetic connecting ring (105), and the front magnetic end (202) is magnetically connected to the rear magnetic end (203) of another filter (200) stacked at the front end of the filter (200).

7. The filter system for a lens with a lotus petal-shaped lens hood according to claim 6, characterized in that, The first magnetic block (106) of the magnetic connecting ring (105) and the second magnetic block in the filter frame (201) are both two or more, and both are arc-shaped and arranged in a ring array. When the filter (200) is assembled to the connecting seat (100), the first magnetic block (106) of the magnetic connecting ring (105) and the second magnetic block of the filter frame (201) attract each other and form a circle.

8. The filter system for a lens with a lotus petal-shaped lens hood according to claim 7, characterized in that, The inner surface of the magnetic connecting ring (105) is provided with two or more protruding first locking edges (107). The first locking edges (107) are arc-shaped and extend along the inner circumferential surface of the magnetic connecting ring (105) in a ring array. The outer circumferential surface of the rear magnetic end (203) of the filter frame (201) is provided with two or more protruding second locking edges (204). The second locking edges (204) are arc-shaped and extend along the outer circumferential surface of the rear magnetic end (203) in a ring array. When the filter (200) is assembled to the connector (100), the first locking edge (107) and the second locking edge (204) are engaged one by one by rotating the filter (200) to complete the assembly. During the rotation of the filter (200), each second magnet in the filter frame (201) is magnetically connected to at least one first magnet (106) of the connector (100).

9. The filter system for a lens with a lotus petal-shaped lens hood according to claim 8, characterized in that, The front magnetic end (202) end face of the filter frame (201) is provided with a forward-protruding limiting ring (205). The inner circumferential surface of the limiting ring (205) is provided with two or more protruding third locking edges (206). The third locking edges (206) are arc-shaped and extend along the inner circumferential surface of the front magnetic end (202) in a ring array. When another filter (200) is stacked on the front end of the filter (200), the rear magnetic end (203) of the other filter (200) is located inside the limiting ring (205). By rotating the other filter (200), the first locking edge (107) and the third locking edge (206) are engaged with each other to complete the assembly. Moreover, during the rotation of the filter (200), each second magnetic block in the two filter frames (201) is magnetically connected to at least one second magnetic block of the other.

10. The filter system for a lens with a lotus petal-shaped lens hood according to any one of claims 1, 2, 4, 5, 7-9, characterized in that, The inner surface of the hoop (102) is provided with an elastic pad (108), and the elastic pad (108) is connected to the surface of the lens (300).

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