Dustproof device for external zoom camera lens

Abstract

The utility model relates to the technical field of zoom lenses, and discloses an external zoom camera lens dustproof device, which comprises an eccentric inner ring, an eccentric outer ring is sleeved outside the eccentric inner ring, and a first connecting sleeve is arranged on one side of the eccentric outer ring. According to the dustproof device for the external zoom camera lens, the first connecting sleeve is pressed into the groove in the side, close to the lens, of the eccentric outer ring, the first connecting sleeve can rotate on the eccentric outer ring through clamping connection of the clamping groove and the clamping ring, and then the second connecting sleeve is placed into the lens barrel clamping the front end of the lens from the front portion of the lens. The upper edge and the lower edge of the dustproof cloth are pasted on the surfaces of the first connecting ring and the second connecting ring through the first double-faced adhesive tape and the second double-faced adhesive tape to be fixed, air can flow normally when the lens cone stretches out and draws back through the arrangement of the dustproof cloth, and normal zooming of the lens is not affected. And meanwhile, large-particle dust and water can be prevented from entering a gap at the zooming part of the lens cone.

Description

Technical Field

[0001] The utility model relates to the technical field of zoom lenses, in particular to a dust-proof device for an external zoom camera lens. Background Art

[0002] A zoom lens is a camera lens that can change its focal length within a certain range, thereby obtaining different widths of field angles, different sizes of images and different ranges of scenery. The zoom lens can change the shooting range by changing the focal length without changing the shooting distance, so it is very helpful for picture composition. Since a zoom lens can take on the role of several fixed-focus lenses, it not only reduces the amount of photographic equipment carried when traveling, but also saves time in changing lenses.

[0003] When zooming, the lens barrel of an existing camera lens with an external zoom design will extend and retract, exposing a portion of the mechanical structure to the external environment. During the extension and retraction of the lens barrel, air will be sucked into the lens. If there is dust, sand or other tiny particles in the environment, they may be brought into the lens along with the airflow. The dust particles may form visible spots in the photos. A large amount of dust accumulated over a long period of time may also cause a decrease in image clarity. Dust and particles may also accumulate on the moving parts of the lens, such as the zoom ring, focus ring and internal gears, which will increase friction and make the lens operation become unsmooth or even jammed. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the prior art lacks the function of intercepting dust, so we propose a dust-proof device for an external zoom camera lens.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a dust-proof device for an external zoom camera lens, comprising an eccentric inner ring, an eccentric outer ring is sleeved on the outside of the eccentric inner ring, a first connecting sleeve is provided on one side of the eccentric outer ring, a clamping ring is provided on the side of the first connecting sleeve close to the eccentric outer ring, a clamping groove for use with the clamping ring is provided inside the eccentric outer ring, a dust-proof cloth is installed on the side of the first connecting sleeve away from the eccentric outer ring, and a second connecting sleeve is installed on the other end of the dust-proof cloth.

[0006] Preferably, a first connecting ring is fixedly connected to a side of the second connecting sleeve close to the dustproof cloth, a first double-sided tape is glued to an outer diameter of the first connecting ring, and an outer diameter of the first double-sided tape is glued to the dustproof cloth.

[0007] Preferably, a second connecting ring is fixedly connected to one side of the first connecting sleeve close to the dustproof cloth, a second double-sided tape is glued to the outer diameter of the second connecting ring, and the outer diameter of the second double-sided tape is glued to the dustproof cloth.

[0008] Preferably, the dustproof cloth is made of waterproof and breathable material.

[0009] Preferably, the inner diameter of the eccentric outer ring is an eccentric structure.

[0010] Preferably, a fault is provided on the surface of the eccentric inner ring.

[0011] Technical effects and advantages of the utility model:

[0012] In the utility model, the first connecting sleeve is pressed into the groove of the eccentric outer ring on the side of the lens, and is connected by the clamping connection between the clamping groove and the clamping ring, so that the first connecting sleeve can rotate on the eccentric outer ring, and then the second connecting sleeve is put into the lens barrel that clamps the front end of the lens from the front of the lens, and then the upper and lower edges of the dustproof cloth are adhered to the surfaces of the first connecting ring and the second connecting ring through the first double-sided adhesive tape and the second double-sided adhesive tape for fixing. Through the provision of the dustproof cloth, air can flow normally when the lens barrel is extended and retracted, and the normal zoom of the lens will not be affected. At the same time, large particles of dust and water can be prevented from entering the gap at the zooming part of the lens barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the eccentric lock structure of the utility model;

[0015] Figure 3 It is a schematic diagram of the explosion structure of the utility model;

[0016] Figure 4 This is a schematic diagram of the explosion structure of the second connecting sleeve of the utility model;

[0017] Figure 5 It is a schematic diagram of the explosion structure of the first connecting sleeve of the utility model.

[0018] Legend: 1. Eccentric inner ring; 2. Eccentric outer ring; 3. First connecting sleeve; 4. Dust-proof cloth; 5. Second connecting sleeve; 6. Fault; 7. First connecting ring; 8. First double-sided tape; 9. Second connecting ring; 10. Second double-sided tape; 11. Snap ring; 12. Slot. DETAILED DESCRIPTION

[0019] The present invention will now be further described in detail in conjunction with the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0020] Reference Figure 1-Figure 5As shown, the utility model provides a technical solution: a dust-proof device for an external zoom camera lens, comprising an eccentric inner ring 1, an eccentric outer ring 2 is sleeved on the outside of the eccentric inner ring 1, a first connecting sleeve 3 is arranged on one side of the eccentric outer ring 2, a clamping ring 11 is arranged on the side of the first connecting sleeve 3 close to the eccentric outer ring 2, a clamping groove 12 used in conjunction with the clamping ring 11 is opened inside the eccentric outer ring 2, a dustproof cloth 4 is installed on the side of the first connecting sleeve 3 away from the eccentric outer ring 2, a second connecting sleeve 5 is installed on the other end of the dustproof cloth 4, and the second connecting sleeve 5 is fixedly connected to the side close to the dustproof cloth 4 A first connecting ring 7 is connected, the outer diameter of the first connecting ring 7 is glued to the first double-sided tape 8, the outer diameter of the first double-sided tape 8 is glued to the dustproof cloth 4, the first connecting sleeve 3 is fixedly connected to the side close to the dustproof cloth 4 with a second connecting ring 9, the outer diameter of the second connecting ring 9 is glued to the second double-sided tape 10, the outer diameter of the second double-sided tape 10 is glued to the dustproof cloth 4, the dustproof cloth 4 is made of waterproof and breathable material, the inner diameter of the eccentric outer ring 2 is an eccentric structure, and the surface of the eccentric inner ring 1 is provided with a fault 6. First, place the eccentric inner ring 1 to the position of the lens focus ring close to the camera side, and then adjust the eccentricity. The relative angle between the inner ring 1 and the eccentric outer ring 2 is adjusted by the installation azimuth of the eccentric outer ring 2 and the eccentric inner ring 1 to adjust the matching relationship between the inner diameter of the ring and the outer ring of the lens. Then, the eccentric outer ring 2 is put on the eccentric inner ring 1 so that the two parts become a whole and are fixed on the lens body. Then, the first connecting sleeve 3 is pressed into the groove of the eccentric outer ring 2 on the side of the lens. The first connecting sleeve 3 is connected by the clamping connection of the clamping groove 12 and the clamping ring 11 so that the first connecting sleeve 3 can rotate on the eccentric outer ring 2. Then, the second connecting sleeve 5 is put into the lens barrel that clamps the front end of the lens from the front of the lens, and then the dustproof cloth 4 is The upper and lower edges are fixed to the surfaces of the first connecting ring 7 and the second connecting ring 9 by means of the first double-sided tape 8 and the second double-sided tape 10. The dustproof cloth 4 is provided to allow air to flow normally when the lens barrel is extended or retracted, and will not affect the normal zoom of the lens. At the same time, large particles of dust and water can be prevented from entering the gap at the zoom part of the lens barrel. A fault 6 is provided on the surface of the eccentric inner ring 1 to cooperate with the eccentric outer ring 2 to adjust the locking degree to adapt to the tolerances existing in actual use and the thermal expansion and contraction caused by different temperature conditions, thereby controlling the overall locking degree.

[0021] Working principle: the user first places the eccentric inner ring 1 to the camera side of the lens focus ring, and then adjusts the relative angle between the eccentric inner ring 1 and the eccentric outer ring 2, and adjusts the matching relationship between the inner diameter of this ring and the outer ring of the lens through the installation azimuth of the eccentric outer ring 2 and the eccentric inner ring 1, and then puts the eccentric outer ring 2 over the eccentric inner ring 1 so that the two parts become a whole and are fixed on the lens body, and then presses the first connecting sleeve 3 into the groove on the lens side of the eccentric outer ring 2, and connects it through the card slot 12 and the card ring 11, so that the first connecting sleeve 3 can rotate on the eccentric outer ring 2, and then puts the second connecting sleeve 5 from the front of the lens into the lens barrel that clamps the front end of the lens, and then fixes the upper and lower edges of the dustproof cloth 4 to the surfaces of the first connecting ring 7 and the second connecting ring 9 through the first double-sided tape 8 and the second double-sided tape 10.

[0022] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dust-proof device for an external zoom camera lens, comprising an eccentric inner ring (1), characterized in that: The eccentric inner ring (1) is sleeved with an eccentric outer ring (2), a first connecting sleeve (3) is provided on one side of the eccentric outer ring (2), a clamping ring (11) is provided on the side of the first connecting sleeve (3) close to the eccentric outer ring (2), a clamping groove (12) for use with the clamping ring (11) is provided inside the eccentric outer ring (2), a dustproof cloth (4) is installed on the side of the first connecting sleeve (3) away from the eccentric outer ring (2), and a second connecting sleeve (5) is installed on the other end of the dustproof cloth (4).

2. The dust-proof device for an external zoom camera lens according to claim 1, characterized in that: A first connecting ring (7) is fixedly connected to one side of the second connecting sleeve (5) close to the dustproof cloth (4); the outer diameter of the first connecting ring (7) is glued to a first double-sided tape (8); and the outer diameter of the first double-sided tape (8) is glued to the dustproof cloth (4).

3. The dust-proof device for an external zoom camera lens according to claim 1, characterized in that: A second connecting ring (9) is fixedly connected to one side of the first connecting sleeve (3) close to the dustproof cloth (4); the outer diameter of the second connecting ring (9) is glued to a second double-sided tape (10); and the outer diameter of the second double-sided tape (10) is glued to the dustproof cloth (4).

4. The dust-proof device for an external zoom camera lens according to claim 1, characterized in that: The dustproof cloth (4) is made of a waterproof and breathable material.

5. The dust-proof device for an external zoom camera lens according to claim 1, characterized in that: The inner diameter of the eccentric outer ring (2) is an eccentric structure.

6. The dust-proof device for an external zoom camera lens according to claim 1, characterized in that: A fault (6) is provided on the surface of the eccentric inner ring (1).

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