An adjustable focus fixed lens auxiliary structure

Abstract

The application relates to the field of lens assisting, and discloses a focal length adjustable fixed focus lens assisting structure. In the application, a fixed outer frame is arranged, a focusing shell is rotatably connected to the inner surface of the fixed outer frame, a supporting groove is welded to the outer surface of the fixed outer frame, a reference plate is movably connected to the inner surface of the supporting groove, an adjusting shaft is rotatably connected to the inner surface of the reference plate, the outer surface of the adjusting shaft is meshedly connected with the focusing shell, a knob is fixedly connected to the outer surface of the end of the adjusting shaft away from the reference plate, the structure is clamped on a fixed focus lens focusing knob through the fixed outer frame, the focusing shell is clamped on the outer edge of the focusing knob through corresponding clamps, the corresponding clamping and fixing adjusting ring is rotated to drive the clamping plate to be extruded and fixed, so that the focusing shell and the focusing knob are integrated, the reference plate and the fixed plate are telescoped, the corresponding adjusting shafts of different diameters are meshed with the external clamping teeth of the focusing shell, when the knob is manually screwed, the corresponding speed reduction accurately drives the focusing shell to rotate, and further angle adjustment of the corresponding focusing knob is completed.

Description

Technical Field

[0001] This application belongs to the field of lens assistance, specifically an auxiliary structure for a fixed-focus lens with adjustable focal length. Background Technology

[0002] An adjustable focal length prime lens is an innovative lens that combines the features of a prime lens and a zoom lens. Unlike traditional prime lenses that only have a fixed focal length, it allows users to adjust the focal length within a certain range, thus achieving flexible control over the shooting distance. Although its focal length range is relatively limited, it offers greater shooting flexibility compared to traditional prime lenses, ensuring both high image quality and meeting diverse shooting needs. This type of lens typically has superior optical performance and a larger aperture, making it suitable for high-precision photography scenarios such as portrait and landscape photography. By adjusting the focal length, photographers can quickly obtain the best image effect according to different shooting environments and needs.

[0003] The design principle of prime lenses allows them to provide higher image quality and a larger aperture, but their focal length is fixed and cannot be adjusted as flexibly as zoom lenses. To overcome this limitation, some innovative prime lenses are designed with adjustable focal length, allowing users to fine-tune the focal length within a certain range. This fine-tuning is usually achieved through an adjustment knob, but due to the optical structure and design limitations of prime lenses, the focal length variation is generally limited, only suitable for some minor shooting needs.

[0004] For some photographic scenarios that require more precise adjustments, photographers may encounter situations where the actual shooting cannot fully meet their needs. Therefore, although adjustable focal length lenses can provide a certain degree of flexibility, in varied shooting environments, they may need to be used in combination with other lenses or undergo more detailed post-processing.

[0005] However, in real-world scenarios, there is no auxiliary device to make finer external angle adjustments, thus enabling better focusing. Utility Model Content

[0006] The purpose of this application is to provide an adjustable focal length fixed-focus lens auxiliary structure to solve the problem that in the above-mentioned practical scenarios, there is no auxiliary device for more precise external angle adjustment, thereby improving focusing.

[0007] The technical solution adopted in this application is as follows: an adjustable focal length fixed-focus lens auxiliary structure, including a fixed outer frame, a focusing housing rotatably connected to the inner surface of the fixed outer frame, a support groove welded to the outer surface of the fixed outer frame, a reference plate movably connected to the inner surface of the support groove, an adjustment shaft rotatably connected to the inner surface of the reference plate, the outer surface of the adjustment shaft engaging with the focusing housing, and a knob fixedly connected to the outer surface of the end of the adjustment shaft away from the reference plate.

[0008] By adopting the above technical solution, the structure is fixed to the focusing knob of the fixed lens by the outer frame, and the focusing housing is correspondingly locked to the outer edge of the focusing knob. The corresponding clamping adjustment ring rotates and drives the clamping plate to squeeze and fix, so that the focusing housing and the focusing knob become one piece. By extending and retracting the reference plate and the fixed plate, the corresponding adjustment shafts of different diameters mesh with the external clamping teeth of the focusing housing. Thus, when the knob is turned by hand, the corresponding deceleration precisely drives the focusing housing to rotate, further completing the angle adjustment of the corresponding focusing knob.

[0009] In a preferred embodiment, a clamping plate is movably connected to the inner surface of the focusing housing, and a support plate is movably sleeved on the outer inner surface of the focusing housing.

[0010] By adopting the above technical solution, the clamping adjustment ring rotates and drives the clamping plate to squeeze and fix, so that the focusing shell and the focusing knob are integrated.

[0011] In a preferred embodiment, the focusing housing is provided with a clamping adjustment ring on the inner outer surface of the corresponding clamping plate, and an observation window is fixedly connected to the middle outer surface of the focusing housing.

[0012] By adopting the above technical solution, the clamping adjustment ring rotates to drive the clamping plate to move, so that the clamping plate synchronously completes the purpose of inward contraction or outward expansion, and the observation window facilitates internal observation for focusing.

[0013] In a preferred embodiment, a fixing plate is fixedly connected to the outer surface of the support groove on the side corresponding to the knob, and a spring is fixedly connected to the outer surface of the reference plate.

[0014] By adopting the above technical solution, the fixing plate is actually spherically connected between the outer support adjustment shaft and the knob at the corresponding release position, which allows for movement at the center of the sphere. The spring will then apply force to the end of the adjustment shaft towards the support groove.

[0015] In a preferred embodiment, a collar is fixedly connected to the outer surface of the end of the spring away from the reference plate, and the inner surface of the collar is movably sleeved on the adjusting shaft.

[0016] By adopting the above technical solution, the collar is sleeved on the adjusting shaft to ensure that the spring is pressed towards the support groove while the adjusting shaft can rotate.

[0017] In a preferred embodiment, an adjustment mark is fixedly connected to the outer surface of the support groove on the side corresponding to the adjustment shaft, and a buffer pad is fixedly connected to the outer surface of the support groove on the side away from the collar.

[0018] By adopting the above technical solution, the adjustment mark provides a proportional indication during adjustment, and the buffer pad provides stable cushioning when the device is fixed to the outer shell, thereby completing the fixation.

[0019] In a preferred embodiment, a support plate is welded to the inner surface of the fixed outer frame, and a clamping plate is welded to the outer surface of the support plate.

[0020] By adopting the above technical solution, the support plate can easily bear force, and then the outer side tilts inward to drive the clamping plate to squeeze and fix it to the lens housing.

[0021] In a preferred embodiment, the fixed outer frame is provided with adjusting screws on the outer surface of the support plate, and a positive marking is fixedly connected to the upper outer surface of the fixed outer frame.

[0022] By adopting the above technical solution, the support plate is pressed down by adjusting the knob and screw, and one end of the support plate is fixed to the fixed outer frame. Under the pressure of the adjusting screw, the clamping plate on the other side is attached and fixed.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:

[0024] In this application, the structure is fixed to the focusing knob of the fixed-focus lens by a fixed outer frame. The focusing housing is correspondingly locked to the outer edge of the focusing knob. The corresponding clamping adjustment ring rotates and drives the clamping plate to squeeze and fix it, so that the focusing housing and the focusing knob become one piece. By extending and retracting the reference plate and the fixed plate, the corresponding adjustment shafts of different diameters engage with the external clamping teeth of the focusing housing. Thus, when the knob is turned by hand, the corresponding deceleration precisely drives the focusing housing to rotate, further completing the angle adjustment of the corresponding focusing knob. Attached Figure Description

[0025] Figure 1 This is a front view of the device in this application;

[0026] Figure 2 This is a side view of the equipment in this application;

[0027] Figure 3 This is a reverse view of the equipment in this application;

[0028] Figure 4 This is a side view of the focusing housing in this application;

[0029] Figure 5 This is a schematic diagram showing the disassembly of the focusing clamping structure in this application.

[0030] The markings in the diagram are: 1. Fixed outer frame; 2. Focusing housing; 3. Support groove; 4. Reference plate; 5. Adjustment shaft; 6. Knob; 7. Clamping plate; 8. Support plate; 9. Clamping adjustment ring; 10. Observation window; 11. Fixed plate; 12. Spring; 13. Collar; 14. Buffer pad; 15. Support plate; 16. Clamping plate; 17. Adjustment screw; 18. Positive indicator; 19. Adjustment indicator. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Example:

[0033] Reference Figure 1-5 An adjustable focal length fixed-focus lens auxiliary structure includes a fixed outer frame 1, a focusing housing 2 rotatably connected to the inner surface of the fixed outer frame 1, a support groove 3 welded to the outer surface of the fixed outer frame 1, a reference plate 4 movably connected to the inner surface of the support groove 3, an adjustment shaft 5 rotatably connected to the inner surface of the reference plate 4, the outer surface of the adjustment shaft 5 engaging with the focusing housing 2, and a knob 6 fixedly connected to the outer surface of the end of the adjustment shaft 5 away from the reference plate 4.

[0034] The structure is fixed to the focusing knob of the fixed lens by the outer frame 1. The focusing housing 2 is correspondingly locked to the outer edge of the focusing knob. The corresponding clamping adjustment ring 9 rotates and drives the clamping plate 7 to squeeze and fix it, so that the focusing housing 2 and the focusing knob are integrated. By extending and retracting the reference plate 4 and the fixing plate 11, the corresponding adjustment shaft 5 with different diameters meshes with the external clamping teeth of the focusing housing 2. When the knob 6 is turned by hand, the corresponding deceleration precisely drives the focusing housing 2 to rotate, further completing the angle adjustment of the focusing knob.

[0035] Reference Figure 1-5 A clamping plate 7 is movably connected to the inner surface of the focusing housing 2, and a support plate 8 is movably sleeved on the outer inner surface of the focusing housing 2.

[0036] The rotation of the clamping adjustment ring 9 causes the clamping plate 7 to press and fix, so that the focusing housing 2 and the focusing knob become one piece.

[0037] Reference Figure 1-3 The focusing housing 2 has a clamping adjustment ring 9 on the inner outer surface of the clamping plate 7, and an observation window 10 is fixedly connected to the middle outer surface of the focusing housing 2.

[0038] The clamping adjustment ring 9 rotates to drive the clamping plate 7 to move, so that the clamping plate 7 can synchronously retract inward or expand outward, and the observation window 10 facilitates internal observation during focusing.

[0039] Reference Figure 1-3 A fixing plate 11 is fixedly connected to the outer surface of the support groove 3 corresponding to the knob 6, and a spring 12 is fixedly connected to the outer surface of the reference plate 4.

[0040] The fixing plate 11 is located between the outer support adjustment shaft 5 and the knob 6. The corresponding release position is actually a spherical connection, which allows for movement at the center of the sphere. The spring 12 will apply force to the end of the adjustment shaft 5 towards the support groove 3.

[0041] Reference Figure 1-3 A collar 13 is fixedly connected to the outer surface of the end of the spring 12 away from the reference plate 4, and the inner surface of the collar 13 is movably sleeved on the adjusting shaft 5.

[0042] The collar 13 is sleeved on the adjusting shaft 5 to ensure that the adjusting shaft 5 can rotate while the spring 12 is pressed against the support groove 3.

[0043] Reference Figure 1-3 The support groove 3 has an adjustment mark 19 fixedly connected to the outer surface of the side corresponding to the adjustment shaft 5, and a buffer pad 14 is fixedly connected to the outer surface of the support groove 3 away from the collar 13.

[0044] Adjustment mark 19 provides a proportional indication during adjustment, and buffer pad 14 provides stable cushioning when the device is fixed to the housing, thereby completing the fixation.

[0045] Reference Figure 1-3 A support plate 15 is welded to the inner surface of the fixed outer frame 1, and a clamping plate 16 is welded to the outer surface of the support plate 15.

[0046] The support plate 15 is easy to bear force, and then the outer side tilts inward to drive the clamping plate 16 to be pressed and fixed at the lens housing.

[0047] Reference Figure 1-3 The outer surface of the fixed outer frame 1 is provided with adjusting screws 17 corresponding to the outer surface of the support plate 15, and the upper outer surface of the fixed outer frame 1 is fixedly connected with a positive marking 18.

[0048] By adjusting the screw 17, the support plate 15 is pressed down. One end of the support plate 15 is fixed to the outer frame 1. Under the pressure of the adjusting screw 17, the clamping plate 16 on the other side is attached and fixed.

[0049] The implementation principle of an embodiment of an adjustable focal length fixed-focus lens auxiliary structure of this application is as follows:

[0050] The structure is secured to the lens housing by a fixed outer frame 1. A knob adjustment screw 17 presses down on the support plate 15, fixing one end of the support plate 15 to the fixed outer frame 1. Under the pressure of the adjustment screw 17, the clamping plate 16 on the other side adheres and is fixed. The focusing housing 2 correspondingly engages with the outer edge of the focusing knob, and the corresponding clamping adjustment ring 9 rotates, causing the clamping plate 7 to press and fix, making the focusing housing 2 and the focusing knob a single unit. By extending and retracting the reference plate 4 and the fixed plate 11, the corresponding adjustment shafts 5 of different diameters engage with the external teeth of the focusing housing 2. When the knob 6 is turned by hand, the corresponding deceleration precisely drives the focusing housing 2 to rotate, further completing the angle adjustment of the focusing knob. The clamping adjustment ring 9 drives the clamping plate 7 to move by rotation, so that the clamping plate 7 synchronously completes the purpose of inward contraction or outward expansion. The observation window 10 facilitates internal observation of focusing. The fixing plate 11 supports the adjustment shaft 5 and the knob 6 on the outside. The corresponding release position is actually a spherical connection, which can make the corresponding movement at the center of the ball. The spring 12 correspondingly forces the end of the adjustment shaft 5 towards the support groove 3.

[0051] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An adjustable focal length fixed-focus lens auxiliary structure, comprising a fixed outer frame (1), characterized in that: The inner surface of the fixed outer frame (1) is rotatably connected to the focusing shell (2). The outer surface of the fixed outer frame (1) is welded with a support groove (3). The inner surface of the support groove (3) is movably connected to a reference plate (4). The inner surface of the reference plate (4) is rotatably connected to an adjustment shaft (5). The outer surface of the adjustment shaft (5) is meshed with the focusing shell (2). A knob (6) is fixedly connected to the outer surface of the end of the adjustment shaft (5) away from the reference plate (4).

2. The adjustable focal length fixed-focus lens auxiliary structure as described in claim 1, characterized in that: The inner surface of the focusing housing (2) is movably connected to a clamping plate (7), and the outer inner surface of the focusing housing (2) is movably fitted with a support plate (8).

3. The adjustable focal length fixed-focus lens auxiliary structure as described in claim 1, characterized in that: The focusing housing (2) is provided with a clamping adjustment ring (9) on the inner outer surface of the corresponding clamping plate (7), and an observation window (10) is fixedly connected to the middle outer surface of the focusing housing (2).

4. The adjustable focal length fixed-focus lens auxiliary structure as described in claim 1, characterized in that: A fixing plate (11) is fixedly connected to the outer surface of the support groove (3) corresponding to the knob (6), and a spring (12) is fixedly connected to the outer surface of the reference plate (4).

5. The adjustable focal length fixed-focus lens auxiliary structure as described in claim 4, characterized in that: A collar (13) is fixedly connected to the outer surface of the end of the spring (12) away from the reference plate (4), and the inner surface of the collar (13) is movably sleeved on the adjusting shaft (5).

6. The adjustable focal length fixed-focus lens auxiliary structure as described in claim 1, characterized in that: The support groove (3) is fixedly connected to the outer surface of the side corresponding to the adjustment shaft (5) with an adjustment mark (19), and the outer surface of the support groove (3) away from the collar (13) is fixedly connected to a buffer pad (14).

7. The adjustable focal length fixed-focus lens auxiliary structure as described in claim 1, characterized in that: The inner surface of the fixed outer frame (1) is welded with a support plate (15), and the outer surface of the support plate (15) is welded with a clamping plate (16).

8. The adjustable focal length fixed-focus lens auxiliary structure as described in claim 1, characterized in that: The fixed outer frame (1) is provided with adjusting screws (17) on the outer surface of the support plate (15), and a positive mark (18) is fixedly connected to the upper outer surface of the fixed outer frame (1).

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