Focus-adjustable optical module

Abstract

The utility model discloses a focusable optical module, and relates to the field of optical equipment. The utility model relates to a focusable optical module, which comprises a first optical lens cone and a second optical lens cone which are matched with each other for use, the focusing lens is fixedly arranged in the first optical lens cone and the second optical lens cone; according to the utility model, the influence of dust on the lens cones can be effectively reduced, on one hand, the dust on the surface of the annular connecting plate is timely cleaned, extra friction force caused by the dust between the lens cones is reduced, the abrasion degree of the lens cones is reduced, the service life of the optical module is prolonged, and on the other hand, gap increase caused by abrasion of the lens cones is avoided; therefore, a large amount of dust is prevented from entering the lens cone to be attached to the focusing lens, the cleanliness of the focusing lens is ensured, the optical module can continuously keep a good imaging effect in the using process, and the stability of the imaging quality is improved.

Description

Technical Field

[0001] This utility model belongs to the field of optical equipment technology, specifically, it relates to an adjustable focus optical module. Background Technology

[0002] Currently, most adjustable focusing optical modules on the market adopt a telescopic structure design, which adjusts the focal length by controlling the extension and retraction of the lens barrel. This is especially true for camera focusing lenses. Although this traditional focusing method can meet basic focal length adjustment needs, as the frequency of use of optical modules increases, the lens barrel needs to be extended and retracted frequently. During this process, the surface of the lens barrel inevitably comes into contact with dust particles from the external environment. This dust gradually adheres to the surface of the lens barrel, increasing the frictional resistance between the lens barrels. Long-term friction leads to accelerated wear on the surface of the lens barrel, causing the gap between the two lens barrels to gradually increase. With the gap increasing, more dust will take the opportunity to enter the inside of the lens barrel and directly adhere to the focusing lens. Dust on the focusing lens will seriously affect the propagation and focusing of light, resulting in a decrease in image quality and problems such as blurring and bokeh.

[0003] To address the problem of dust accumulation inside the lens barrel, some existing technologies attempt to improve the sealing performance of the lens barrel by adding sealing rings or dust covers. However, these measures can only slow down the entry of dust to a certain extent and cannot fundamentally solve the problem. Moreover, with the frequent expansion and contraction of the lens barrel, the sealing rings are prone to aging or damage, resulting in a gradual decrease in the dustproof effect. In view of this, this utility model is proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an adjustable focus optical module that can overcome or at least partially solve the above problems.

[0005] To solve the above-mentioned technical problems, the basic concept of the present invention is as follows: an adjustable optical module, comprising: a first optical tube and a second optical tube used in cooperation with each other; a focusing lens, fixedly installed inside the first optical tube and the second optical tube; a connecting threaded shell, fixedly connected to the end of the first optical tube away from the second optical tube; a protective lens, fixedly connected to the end of the second optical tube away from the first optical tube; an annular groove is formed in the inner wall of the first optical tube, and an annular connecting plate is slidably connected in the annular groove, the end of the annular connecting plate extending out of the annular groove being fixedly connected to the second optical tube; an annular tube is fixedly connected to the first optical tube near the second optical tube, and multiple air nozzles are equidistantly connected on the annular tube, the air nozzles facing the second optical tube; an air inlet and an air outlet are respectively formed in the annular groove, and a one-way valve is installed in both the air inlet and the air outlet of the annular groove, and the air outlet of the annular groove and the air inlet of the annular tube are connected by a connecting air pipe.

[0006] Furthermore, it also includes a semi-circular self-resetting airbag, which is fixedly connected to the first optical tube near the air inlet of the annular groove, and the air inlet of the semi-circular self-resetting airbag is connected to the air inlet of the annular groove.

[0007] To facilitate the filtration of dust in the drawn-out gas, a filter screen is further fixedly connected to the air inlet of the semi-circular self-resetting airbag.

[0008] To facilitate more stable pressing of the semi-circular self-resetting airbag by the user, the surface of the semi-circular self-resetting airbag is further roughened.

[0009] To ensure the stability of the connection between the first and second optical barrels after resetting, the upper end of the annular connecting plate is further provided with multiple elastic pull ropes fixedly connected at equal intervals around the circumference, and the upper ends of the elastic pull ropes are fixedly connected to the upper end of the annular groove.

[0010] To facilitate reducing the length of the connecting air tube, the connecting air tube is further described as an elastic and stretchable air tube.

[0011] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention can effectively reduce the impact of dust on the lens barrel. On the one hand, timely cleaning of dust on the surface of the annular connecting plate reduces the additional friction caused by dust between the lens barrels, thereby reducing the wear of the lens barrel and extending the service life of the optical module. On the other hand, it avoids the increase of gap due to lens barrel wear, thereby preventing a large amount of dust from entering the lens barrel and adhering to the focusing lens, ensuring the cleanliness of the focusing lens, so that the optical module can maintain good imaging effect during use and improve the stability of imaging quality.

[0012] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0013] In the attached diagram:

[0014] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0016] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 4 This utility model Figure 3 A schematic diagram of the structure of part A.

[0018] In the diagram: 1. First optical tube; 101. Annular groove; 102. Elastic pull cord; 2. Second optical tube; 201. Protective lens; 202. Annular connecting plate; 3. Connecting threaded shell; 4. Focusing lens; 5. Semi-circular self-resetting airbag; 501. Filter screen; 502. Connecting air tube; 503. Annular tube; 504. Jet head. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0020] Example 1:

[0021] Reference Figures 1-4An adjustable focusing optical module includes: a first optical lens barrel 1 and a second optical lens barrel 2 that cooperate with each other; a focusing lens 4, fixedly installed inside the first optical lens barrel 1 and the second optical lens barrel 2; a connecting threaded shell 3, fixedly connected to the end of the first optical lens barrel 1 away from the second optical lens barrel 2; a protective lens 201, fixedly connected to the end of the second optical lens barrel 2 away from the first optical lens barrel 1; an annular groove 101 is formed in the inner wall of the first optical lens barrel 1, and an annular connecting plate 202 is slidably connected in the annular groove 101. 2. One end of the annular groove 101 is fixedly connected to the second optical lens tube 2; the annular tube 503 is fixedly connected to the first optical lens tube 1 near the second optical lens tube 2, and multiple jet heads 504 are equidistantly connected on the annular tube 503 in a circular pattern, with the jet nozzles of the jet heads 504 facing the second optical lens tube 2; the annular groove 101 is provided with an air inlet and an air outlet respectively, and a one-way valve is installed in both the air inlet and the air outlet of the annular groove 101. The air outlet of the annular groove 101 and the air inlet of the annular tube 503 are connected by a connecting air pipe 502.

[0022] Most existing adjustable focusing optical modules adopt a telescopic structure, which adjusts the focal length by controlling the extension and retraction of the lens barrel. In this structure, as the number of times the lens barrel extends and retracts increases, and when used in environments with a lot of dust, dust easily adheres to the surface of the lens barrel. The dust on the surface of the lens barrel increases the friction between the lens barrels, which leads to accelerated wear. After long-term use, this wear will increase the gap between the two lens barrels, making it easier for dust to enter the inside of the lens barrel and adhere to the focusing lens 4, affecting the image quality.

[0023] In this adjustable-focus optical module, the first optical barrel 1 and the second optical barrel 2 are slidably connected via an annular groove 101 and an annular connecting plate 202. When the second optical barrel 2 is extended, it drives the annular connecting plate 202 to slide within the annular groove 101. Since a one-way valve is installed at the air inlet of the annular groove 101, outside air enters the annular groove 101 through the air inlet during this process, achieving gas storage. When the second optical barrel 2 needs to be retracted, the gas stored in the annular groove 101... The stored gas, due to compression, flows out through the outlet. The outlet is connected to the annular tube 503 via a connecting pipe 502, allowing the gas to enter the annular tube 503. Multiple jet nozzles 504 are evenly distributed in a circle on the annular tube 503. The jet nozzles of these jet nozzles 504 are positioned facing the second optical lens tube 2, that is, towards the outer surface of the annular connecting plate 202. Therefore, the gas ejected through the jet nozzles 504 can blow away and clean any dust that may be attached to the surface of the annular connecting plate 202.

[0024] Through the unique gas cleaning design described above, this adjustable focusing optical module can effectively reduce the impact of dust on the lens barrel. On the one hand, it cleans the dust on the surface of the annular connecting plate 202 in a timely manner, reducing the additional friction caused by dust between the lens barrels, thereby reducing the wear of the lens barrel and extending the service life of the optical module. On the other hand, it avoids the increase in gap due to lens barrel wear, thus preventing a large amount of dust from entering the lens barrel and adhering to the focusing lens 4, ensuring the cleanliness of the focusing lens 4, so that the optical module can maintain good imaging effect during use and improve the stability of imaging quality.

[0025] Example 2:

[0026] Reference Figures 1-4 An adjustable focusing optical module, basically the same as in Embodiment 1, further includes a semi-circular self-resetting airbag 5. The semi-circular self-resetting airbag 5 is fixedly connected to the first optical barrel 1 near the air inlet of the annular groove 101. The air inlet of the semi-circular self-resetting airbag 5 is connected to the air inlet of the annular groove 101. When it is necessary to extend the second optical barrel 2, the semi-circular self-resetting airbag 5 can be pressed to inflate the annular groove 101, and then the second optical barrel 2 will move outward, thereby allowing for more precise adjustment of the distance between the two focusing lenses 4.

[0027] A filter 501 is fixedly connected to the air inlet of the semi-circular self-resetting airbag 5. The filter 501 is installed at the air inlet of the semi-circular self-resetting airbag 5 and can perform preliminary filtration of the air entering the airbag and the annular groove 101. The outside air may contain foreign objects such as dust, hair, and small particles. The filter 501 can block these larger particles of impurities and prevent them from entering the optical module. Preventing foreign objects from entering can effectively reduce the risk of the one-way valve in the annular groove 101 being blocked, ensure smooth gas flow, maintain the normal operation of the air jet cleaning function of the annular tube 503, and also prevent foreign objects from damaging the optical components inside the lens barrel.

[0028] The surface of the semi-circular self-resetting airbag 5 is rough. In actual use, when the position of the lens barrel of the optical module needs to be manually adjusted or related operations are performed, the user's hand needs to be in contact with the semi-circular self-resetting airbag 5. The rough surface significantly increases the friction between the airbag and the skin of the hand, making it less likely for the user's hand to slip when holding the airbag and applying force. Even when the hands are wet or cold, resulting in decreased perception, or when the optical module is in a complex installation environment, the extension and retraction of the lens barrel can be accurately and stably controlled, avoiding operational errors caused by hand slippage, and improving the safety and reliability of the optical module.

[0029] Example 3:

[0030] Reference Figures 1-4 An adjustable-focus optical module, basically the same as in Embodiment 2, but further: the upper end of the annular connecting plate 202 is fixedly connected with multiple elastic pull ropes 102 at equal intervals around the circumference. The upper end of the elastic pull ropes 102 is fixedly connected to the upper end of the annular groove 101. The multiple elastic pull ropes 102 are distributed at equal intervals around the circumference. After the second optical lens barrel 2 is reset, tension is applied to the annular connecting plate 202 from multiple directions to form a stable constraint structure. This uniform tension distribution can effectively counteract the shaking or displacement caused by external force collisions, equipment vibrations, etc., so that the lens barrel is firmly kept in the initial position, preventing the focal length accuracy from being affected by accidental sliding of the lens barrel, ensuring the stability and reliability of the optical module imaging, and extending the service life of the equipment.

[0031] The connecting air tube 502 is an elastic and retractable air tube. During the focusing process of the optical module, the first optical tube 1 and the second optical tube 2 will perform relative extension and retraction movements. The elastic and retractable connecting air tube 502 can freely extend or retract with the change of the distance between the tubes, avoiding the restriction of the normal movement of the tubes due to the fixed length of the air tube. This ensures that the extension and retraction of the tubes is smooth and unobstructed, without affecting the realization of the focusing function. Furthermore, the elastic and retractable function eliminates the need for a longer connecting air tube 502, which makes the internal structure of the optical module more compact, effectively saving space and facilitating the miniaturization design and installation of the optical module. It also reduces the risk of excessively long air tubes tangling and accumulating inside, causing interference to other components, and improves the overall reliability of the structure.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model.

Claims

1. An optical module of which the focal length is adjustable, characterized in that, include: The first optical tube (1) and the second optical tube (2) are used in conjunction with each other; The focusing lens (4) is fixedly installed inside the first optical lens barrel (1) and the second optical lens barrel (2); The connecting threaded shell (3) is fixedly connected to the end of the first optical lens barrel (1) away from the second optical lens barrel (2); The protective lens (201) is fixedly connected to the inside of the second optical lens tube (2) at the end away from the first optical lens tube (1); The first optical lens barrel (1) has an annular groove (101) inside its barrel wall. An annular connecting plate (202) is slidably connected inside the annular groove (101). One end of the annular connecting plate (202) extending out of the annular groove (101) is fixedly connected to the second optical lens barrel (2). An annular tube (503) is fixedly connected to the first optical tube (1) near the second optical tube (2). Multiple jet nozzles (504) are connected in a circular pattern at equal intervals on the annular tube (503). The jet nozzles (504) are positioned with their nozzles facing the second optical tube (2). An air inlet and an air outlet are respectively provided on the annular groove (101). A one-way valve is installed in both the air inlet and the air outlet of the annular groove (101). The air outlet of the annular groove (101) and the air inlet of the annular pipe (503) are connected by a connecting air pipe (502).

2. The optical module according to claim 1, wherein It also includes a semi-circular self-resetting airbag (5), which is fixedly connected to the first optical tube (1) near the air inlet of the annular groove (101), and the air inlet of the semi-circular self-resetting airbag (5) is connected to the air inlet of the annular groove (101).

3. An optical module according to claim 2, wherein A filter (501) is fixedly connected to the air inlet of the semi-circular self-resetting airbag (5).

4. The tunable optical module of claim 2, wherein, The surface of the semi-circular self-resetting airbag (5) is rough.

5. The tunable optical module of claim 1, wherein, The upper end of the annular connecting plate (202) is fixedly connected with multiple elastic pull ropes (102) at equal intervals around the circumference, and the upper end of the elastic pull ropes (102) is fixedly connected to the upper end of the annular groove (101).

6. The tunable optical module of claim 1, wherein, The connecting air tube (502) is an elastic and stretchable air tube.

Images