A rear filter holder structure for an optical lens

Abstract

This utility model discloses a rear filter holder structure for an optical lens, relating to the field of optical camera lens technology. It includes a lens fitting component fixed to the lens, and a filter holder detachably mounted on the lens fitting component. A filter mounting ring is connected at its lower end to the filter holder. The upper end of the filter mounting ring has an internal thread, and the edge of the filter has an external thread. The internal and external threads are used to screw and replace corresponding filters. In this rear filter holder structure, the internal thread on the rear filter holder allows for the replacement and installation of universal filters, reducing the cost of using the rear filter holder. Furthermore, by mounting the filter on the filter holder and then attaching the filter holder to the lens connector by inverting it, quick assembly is achieved.

Description

Technical Field

[0001] This utility model relates to the field of optical camera lens technology, and more specifically, to a rear filter bracket structure for an optical lens. Background Technology

[0002] Telephoto lenses with large apertures typically have front-mounted filters, which are large and expensive. Furthermore, the distance between the front-mounted filter and the camera makes using rotating filters like CPL filters inconvenient. Therefore, telephoto lenses often feature side-mounted filters at the rear of the lens, reducing filter size and bringing them closer to the camera for easier operation. However, because rear-mounted filters require a dedicated filter holder to work with the camera, and current rear-mounted filters and holders are integrated, replacing different types of filters requires replacing the entire set, resulting in high costs. Utility Model Content

[0003] To overcome the above shortcomings, this utility model provides a rear filter holder structure for optical lenses, which aims to reduce the cost of using the rear filter holder. Through the standard filter thread set on the rear filter holder, universal filters can be replaced and installed.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An optical lens rear filter holder structure includes:

[0006] Lens fitting, wherein the lens fitting is fixed on the lens;

[0007] A filter holder, which is detachably mounted and connected to a lens fitting;

[0008] A filter mounting ring, the lower end of which is connected to the filter holder;

[0009] The filter mounting ring has an internal thread at its upper end and an external thread at the edge of the filter. The corresponding filter is installed and replaced by the screw engagement of the internal and external threads.

[0010] Further technology of this utility model:

[0011] Preferably, the lower end of the filter mounting ring is connected to the inner circle of the filter holder with a gap. The filter mounting ring is provided with an annular groove, and a retaining spring is installed in the annular groove to install the filter mounting ring on the filter holder.

[0012] Preferably, the outer edge of the upper end of the filter mounting ring is a toothed surface, and the filter bracket is provided with a gear structure that meshes with the toothed surface to drive the filter mounting ring to rotate on the filter bracket.

[0013] Preferably, the gear structure includes a hand-operated gear, which is mounted on the filter holder via a shaft. The filter holder is also provided with a transmission gear. The hand-operated gear meshes with the transmission gear, and the transmission gear meshes with the toothed surface of the filter mounting ring.

[0014] Preferably, the filter holder has a slot, a manual gear is installed in the slot, and the manual gear protrudes from the outer side of the filter holder.

[0015] Preferably, the filter holder has slots on both sides, which are used to install buttons and provide guidance for the buttons. The slots are also provided with grooves for installing springs, and the buttons are provided with grooves to fix the springs.

[0016] The lens fitting is provided with a slot, and the button is provided with a buckle. The filter bracket is fixed by the buckle cooperating with the slot. When the button is pressed down, the spring is compressed and the buckle is disengaged from the slot.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] The optical lens rear filter holder structure provided by this utility model allows for the replacement and installation of universal filters through the internal threads provided on the rear filter holder, reducing the cost of using the rear filter holder. At the same time, by installing the filter on the filter holder and then attaching the filter holder to the lens connector by inverting it, quick assembly can be achieved. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A three-dimensional exploded view of an optical lens rear filter bracket structure provided for an embodiment of this utility model;

[0021] Figure 2 A three-dimensional exploded view of an optical lens rear filter bracket structure provided for an embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the installation structure of an optical lens rear filter holder and lens mating parts provided for an embodiment of this utility model.

[0023] Figure 4 This is a schematic cross-sectional view of the installation structure of an optical lens rear filter holder and lens fitting component provided for an embodiment of this utility model.

[0024] Figure 5 A cross-sectional structural diagram of an optical lens rear filter bracket structure provided for an embodiment of this utility model;

[0025] Figure 6 A cross-sectional schematic diagram of an optical lens rear filter bracket structure provided for an embodiment of this utility model.

[0026] Figure 7 This is a schematic diagram of the button installation of a rear filter bracket structure for an optical lens, provided for an embodiment of this utility model.

[0027] In the diagram: 1. Filter holder, 2. Filter mounting ring, 3. Snap ring, 4. Gear pressure plate one, 5. Gear pressure plate two, 6. Hand-operated gear, 7. Transmission gear, 8. Button, 9. Spring, 10. Filter, 11. Lens fitting, 12. Protective plate, 13. Hole slot, 14. Groove, 15. Inverted clip, 16. Annular base, 17. Mounting base, 18. Arc plate, 19. Slot, 20. Snap-in slot, 21. Annular groove. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit its scope.

[0029] like Figure 1-7 As shown, this utility model provides a rear filter holder structure for an optical lens, comprising:

[0030] Lens fitting 11, wherein the lens fitting 11 is fixed on the lens;

[0031] Filter holder 1, which is detachably mounted and connected to lens fitting 11;

[0032] Filter mounting ring 2, the lower end of which is connected to the filter holder 1;

[0033] The filter mounting ring 2 has an internal thread at its upper end, and the filter 10 has an external thread on its edge. The corresponding filter 10 is installed and replaced by the screw engagement of the internal and external threads.

[0034] It should be noted that in this embodiment, both the internal and external threads adopt the standard filter 10 thread, and the rear filter bracket 1 can install UV, CPL, and ND filters 10; through the standard filter 10 thread provided on the rear filter bracket 1, the replacement and installation of the universal filter 10 can be realized.

[0035] The lower end of the filter mounting ring 2 is connected to the inner circle of the filter holder 1 with a gap. The filter mounting ring 2 is provided with an annular groove 21, and a retaining spring 3 is installed in the annular groove 21 to install the movable mounting ring of the filter 10 on the filter holder 1.

[0036] The outer edge of the upper end of the filter mounting ring 2 is toothed, and the filter support 1 is provided with a gear structure that meshes with the toothed surface to drive the filter mounting ring 2 to rotate on the filter support 1.

[0037] The gear structure includes a hand-operated gear 6, which is mounted on the filter holder 1 via a shaft. The filter holder 1 is also provided with a transmission gear 7. The hand-operated gear 6 meshes with the transmission gear 7, and the transmission gear 7 simultaneously meshes with the tooth surface of the filter mounting ring 2.

[0038] The filter holder 1 has a slot 19, and the manual gear 6 is installed in the slot 19, with the manual gear 6 protruding from the outer side of the filter holder 1.

[0039] The manual gear 6 protrudes from the outer side of the filter holder 1, allowing for easy rotation by hand. This rotation drives the transmission gear 7, which in turn controls the rotation of the filter mounting ring 2. The filter 10 is mounted on the filter holder 1, which is then connected to the lens connector via the inverted clip 15. During lens shooting, the filter 10 can be adjusted quickly and easily by manually rotating the manual gear assembly.

[0040] The transmission gear 7 is positioned between the hand-operated gear 6 and the tooth surface of the filter mounting ring 2. The filter mounting ring 2 is rotatably connected to the filter holder 1 via the annular groove 14 and the snap ring 3. The hand-operated gear 6 is also rotatably connected to the slot 19 of the filter holder 1 via a shaft. The filter mounting ring 2 is located on the inner ring of the filter holder 1, and the hand-operated gear 6 is located on the outer ring of the filter holder 1. In order to achieve transmission, the transmission gear 7 is positioned in the middle. Therefore, a pressure plate is needed to fix the transmission gear 7. In this embodiment, the pressure plate is divided into a lower gear pressure plate 4 and an upper gear pressure plate 5. The lower gear pressure plate 4 and the upper gear pressure plate 5 are fixedly connected to the filter holder 1.

[0041] The filter holder 1 has slots 13 on both sides, which are used to install buttons 8 and provide guidance for buttons 8. The slots 13 have grooves 14 for installing springs 9, and the buttons 8 are fixed to the springs 9 by the grooves 14.

[0042] The slot is provided with a groove for installing the spring 9. The button 8 is provided with a groove to fix the spring 9, to prevent the spring 9 from falling off, and to provide a reset force for pressing the button 8.

[0043] The lens fitting 11 is provided with a slot 20, and the button 8 is provided with a buckle 15. The filter bracket 1 is fixed by the buckle 15 cooperating with the slot 20. When the button 8 is pressed down, the spring 9 is compressed, and the buckle 15 is disengaged from the slot 20.

[0044] In this embodiment, the lens fitting 11 includes an annular base 16 connected to the lens. The annular base 16 is provided with a C-shaped protective plate 12. The annular base 16 is provided with mounting holes to facilitate connection with the lens. The protective plate 12 is provided with slots 20 at both ends. The filter bracket 1 includes an annular mounting seat 17 for mounting the filter mounting ring 2. An arc plate 18 is provided on one side of the annular mounting seat 17. The holes 13 and slots 19 are both provided on the arc plate 18. When the buckle 15 is engaged with the slots 20, the annular base 16 and the annular mounting seat 17 are coaxial vertically. The arc plate 18 and the C-shaped protective plate 12 combine to form a complete annular structure.

[0045] In the above structure, the spring 9 is in the initial state, there is a gap between the bottom of the button 8 and the bottom of the slot 13, the button 8 protrudes out of the outside of the filter holder 1, the spring 9 is compressed when the button 8 is pressed inward, the buckle 15 retracts inward, at this time, the filter holder 1 and the lens fitting 11 are connected, the button 8 is released, the spring 9 rebounds, the buckle 15 protrudes outward and is inserted into the slot 20, and the filter holder 1 and the lens fitting 11 are engaged.

[0046] It should be noted that when button 8 is pressed to the bottom of slot 13, button 8 still protrudes from the outside of filter holder 1, and the surface has texture to make it easy to press.

[0047] When disassembly is required, press button 8 inward to compress spring 9 and retract buckle 15 inward. At this time, filter holder 1 and lens fitting 11 are not connected in any other way. Press button 8 to release buckle 15 and remove filter holder 1 from lens fitting 11.

[0048] In this invention, when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

Claims

1. A rear filter holder structure for an optical lens, characterized in that, include: Lens fitting, wherein the lens fitting is fixed on the lens; A filter holder, which is detachably mounted and connected to a lens fitting; A filter mounting ring, the lower end of which is connected to the filter holder; The filter mounting ring has an internal thread at its upper end and an external thread at the edge of the filter. The corresponding filter is installed and replaced by the screw engagement of the internal and external threads.

2. The optical lens rear filter holder structure according to claim 1, characterized in that: The lower end of the filter mounting ring is connected to the inner circle of the filter holder with a gap. The filter mounting ring is provided with an annular groove, and a retaining spring is installed in the annular groove to install the filter mounting ring on the filter holder.

3. The optical lens rear filter holder structure according to claim 2, characterized in that: The outer edge of the upper end of the filter mounting ring is toothed, and the filter bracket is provided with a gear structure that meshes with the toothed surface to drive the filter mounting ring to rotate on the filter bracket.

4. The optical lens rear filter holder structure according to claim 3, characterized in that: The gear structure includes a hand-operated gear, which is mounted on a filter holder via a shaft. The filter holder is also provided with a transmission gear. The hand-operated gear meshes with the transmission gear, and the transmission gear meshes with the toothed surface of the filter mounting ring.

5. The optical lens rear filter holder structure according to claim 4, characterized in that: The filter holder has a slot, and a manual gear is installed in the slot, with the manual gear protruding from the outer side of the filter holder.

6. The optical lens rear filter holder structure according to claim 1, characterized in that: The filter holder has slots on both sides, which are used to install buttons and provide guidance for the buttons. The slots also have grooves for installing springs, and the buttons have grooves to fix the springs. The lens fitting is provided with a slot, and the button is provided with a buckle. The filter bracket is fixed by the buckle cooperating with the slot. When the button is pressed down, the spring is compressed and the buckle is disengaged from the slot.

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