Lens barrel adjusting mechanism

Abstract

The utility model discloses a lens cone adjusting mechanism, which comprises a front cylinder body, a middle cylinder body and a rear cylinder body, adjacent ends of the front cylinder body and the rear cylinder body are fixedly connected with inner cylinders, and the middle cylinder body is sleeved on the outer surfaces of the two inner cylinders; a shell is fixedly connected to one side of the outer surface of the middle barrel, a gear is arranged on the inner side of the shell, rack assemblies are connected to the top and the bottom of the gear in a meshed mode, and the two rack assemblies penetrate through the shell. According to the utility model, through the arrangement of the inner cylinder, the shell, the gear, the rack assembly, the rotating shaft, the knob, the spring pressing assemblies, the clamping teeth and the limiting gear ring, during adjustment, the two spring pressing assemblies are synchronously pressed, the clamping teeth are separated from the limiting gear ring, limiting is relieved, then the knob can be screwed, and the distances between the front cylinder body and the middle cylinder body as well as between the rear cylinder body and the middle cylinder body are synchronously adjusted through all the parts; and after the adjustment is finished, the knob is released, the operation is convenient, the operation steps are reduced, and the adjustment efficiency is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lens barrel adjustment, in particular to a lens barrel adjustment mechanism. Background Art

[0002] The optical lens tube focuses the light of the target object through the objective lens system, amplifies the light through the eyepiece system, and achieves clear imaging through the focusing system. In this way, the observer can see a magnified and clear image of the target object. The focusing or dimming function can be achieved by adjusting the distance between the two lenses in the optical lens tube.

[0003] The prior art publication number is CN219143175U, which is a lens barrel, comprising a front barrel, a middle barrel and a rear barrel, wherein one end of the front barrel is threadedly connected to the middle barrel, and one end of the middle barrel is threadedly connected to the rear barrel, annular locking grooves are provided on the surface of the front barrel near the position where the front barrel is threadedly connected to the middle barrel and on the outer surface of the middle barrel near the position where the front barrel is threadedly connected to the rear barrel, and a second anti-slip friction pad is fixed to the inner bottom wall of the annular locking groove.

[0004] Although the lens barrel can prevent accidental rotation between the barrels, the adjustment steps are relatively cumbersome. Compared with the original lens barrel, two more steps of releasing the limit and re-tightening are added, which reduces the adjustment efficiency. At the same time, when adjusting, the three barrels lack limiters. When rotating the middle barrel, it is necessary to hold the barrels on both sides to prevent it from rotating, which makes the adjustment operation inconvenient. When rotating the barrels at both ends, although only the middle barrel needs to be held, two adjustments are required, which reduces the adjustment efficiency. Therefore, improvements are proposed. Utility Model Content

[0005] The utility model is a lens barrel adjusting mechanism proposed to solve the shortcomings in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a lens barrel adjustment mechanism, comprising a front barrel, a middle barrel and a rear barrel, wherein the front barrel and the rear barrel are both fixedly connected to an inner barrel at one end adjacent to each other, and the middle barrel is sleeved on the outer surfaces of the two inner barrels;

[0007] A shell is fixedly connected to one side of the outer surface of the middle cylinder, a gear is provided on the inner side of the shell, the top and bottom of the gear are meshed with rack assemblies, and the two rack assemblies are both arranged through the shell, and the two rack assemblies are respectively fixedly connected to the adjacent front cylinder and rear cylinder;

[0008] A rotating shaft is fixedly connected to one side of the outer surface of the gear, and the rotating shaft passes through the housing and is rotatably connected thereto, and a knob is fixedly connected to the other end of the rotating shaft;

[0009] The knob is symmetrically mounted with two spring pressing assemblies, and the movable ends of the two spring pressing assemblies are fixedly connected with latch teeth;

[0010] One side of the outer surface of the shell is fixedly connected to a limiting toothed ring, and the latching teeth match the limiting toothed ring.

[0011] Furthermore, the two rack assemblies each include a rack body, and the rack body passes through the shell and is meshed with the gear. One end of the rack body is fixedly connected to a connecting block, and the connecting block is fixedly connected to the adjacent front cylinder and the adjacent rear cylinder. The two connecting blocks can be driven to separate or approach each other through the cooperation of the gear and the rack body.

[0012] Furthermore, a slide rail is slidably connected to one side of the outer surface of the rack body, and the slide rail is fixedly connected to the shell. The slide rail has a limiting effect on the rack body, which can ensure the stability of the movement of the rack body.

[0013] Furthermore, the two spring pressing assemblies each include an installation groove, and the installation groove is opened on one side of the outer surface of the knob. The inner wall of one side of the installation groove is opened with a travel groove that penetrates to the outer wall of the knob. The setting of the installation groove and the travel groove is conducive to the installation of various components of the spring pressing assembly.

[0014] Furthermore, a spring is fixedly installed on the inner wall of one side of the installation groove, and a pressing block is fixedly connected to the other end of the spring, and the pressing block is slidably connected to the installation groove. In the absence of external pressure, the pressing block is always in an extended state under the action of the spring.

[0015] Furthermore, a fixing rod is fixedly connected to one side of the outer surface of the pressing block, and the fixing rod matches the travel groove. The fixing rod is fixedly connected to adjacent teeth, and the travel groove limits the moving travel of the fixing rod to prevent it from moving beyond the travel range.

[0016] Furthermore, the middle cylinder is sealingly and slidably sleeved on the outer surfaces of the two inner cylinders, and two rubber sleeves are symmetrically and fixedly installed on the inner surface of the middle cylinder, and the rubber sleeves are sealingly sleeved on the outer surfaces of the inner cylinders to ensure the sealing of the connection and prevent light transmission.

[0017] Beneficial effects of the utility model:

[0018] When the utility model is in use, the lens barrel adjustment mechanism, through the inner barrel, shell, gear, rack assembly, rotating shaft, knob, spring pressing assembly, latch teeth and limiting tooth ring, can simultaneously press the two spring pressing assemblies during adjustment to disengage the latch teeth from the limiting tooth ring to release the limit, and then the knob can be turned to synchronously adjust the distance between the front barrel body, the rear barrel body and the middle barrel body through various components. After the adjustment is completed, the knob can be released, which is easy to operate, reduces the operating steps, and improves the adjustment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 : A three-dimensional diagram of the utility model;

[0021] Figure 2 : A cross-sectional view of the utility model;

[0022] Figure 3 : A sectional view of a knob of the present invention.

[0023] The reference numerals are as follows:

[0024] 1. Front cylinder; 2. Shell; 3. Knob; 4. Middle cylinder; 5. Connecting block; 6. Rear cylinder; 7. Inner cylinder; 8. Rack body; 9. Limiting gear ring; 10. Rotating shaft; 11. Gear; 12. Slide rail; 13. Pressing block; 14. Travel groove; 15. Spring; 16. Mounting groove; 17. Fixing rod; 18. Gear. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figures 1 to 3 As shown, it relates to a lens barrel adjustment mechanism, including a front barrel body 1, a middle barrel body 4 and a rear barrel body 6, the front barrel body 1 and the rear barrel body 6 are fixedly connected at one adjacent end with an inner barrel 7, and the middle barrel body 4 is sleeved on the outer surfaces of the two inner barrels 7, the middle barrel body 4 is sealingly and slidably sleeved on the outer surfaces of the two inner barrels 7, and two rubber sleeves are symmetrically and fixedly installed on the inner surface of the middle barrel body 4, and the two rubber sleeves are respectively sealingly sleeved on the outer surfaces of adjacent inner barrels 7 to ensure the sealing of the connection between the middle barrel body 4 and the inner barrel 7 to avoid light transmission after adjustment.

[0027] One side of the outer surface of the middle cylinder 4 is fixedly connected to the shell 2, and a gear 11 is provided on the inner side of the shell 2. The top and bottom of the gear 11 are meshed with rack assemblies, and the two rack assemblies are both arranged through the shell 2, and the two rack assemblies are respectively fixedly connected to the adjacent front cylinder 1 and the rear cylinder 6. The two rack assemblies include a rack body 8, and the rack body 8 is arranged through the shell 2 and meshed with the gear 11. One end of the rack body 8 is fixedly connected to a connecting block 5, and the connecting block 5 is fixedly connected to the adjacent front cylinder 1 and the adjacent rear cylinder 6. When the gear 11 rotates, the front cylinder 1 and the rear cylinder 6 are respectively driven away from the middle cylinder 4 through the rack body 8 and the connecting block 5. One side of the outer surface of the rack body 8 is slidably connected to a slide rail 12, and the slide rail 12 is fixedly connected to the shell 2. The setting of the slide rail 12 can ensure the stability of the movement of the rack body 8.

[0028] One side of the outer surface of the gear 11 is fixedly connected with a rotating shaft 10, and the rotating shaft 10 passes through the housing 2 and is rotatably connected thereto. The other end of the rotating shaft 10 is fixedly connected with a knob 3, and the setting of the knob 3 facilitates the driving gear 11 to rotate.

[0029] The knob 3 is symmetrically equipped with two spring pressing assemblies, and the movable ends of the two spring pressing assemblies are fixedly connected with latch teeth 18. One side of the outer surface of the shell 2 is fixedly connected with a limit tooth ring 9, and the latch teeth 18 match the limit tooth ring 9. The two spring pressing assemblies each include a mounting groove 16, and the mounting groove 16 is opened on one side of the outer surface of the knob 3. One side inner wall of the mounting groove 16 is opened with a travel groove 14 that penetrates to the outer wall of the knob 3. A spring 15 is fixedly installed on one side inner wall of the mounting groove 16. The other end of the spring 15 is fixedly connected with a pressing block 13, and the pressing block 13 is slidably connected to the mounting groove 16. One side of the outer surface of the pressing block 13 is fixedly connected with a fixing rod 17, and the fixing rod 17 matches the travel groove 14. The fixing rod 17 is fixedly connected to the adjacent latch teeth 18. When the latch teeth 18 are embedded in the tooth groove of the limit tooth ring 9, a limiting effect is achieved.

[0030] Working principle: when it is necessary to adjust the distance between the front cylinder 1, the rear cylinder 6 and the middle cylinder 4, use two fingers to press the two pressing blocks 13 simultaneously, and the pressing block 13 drives the latch 18 to move through the fixed rod 17 until the latch 18 is disengaged from the limiting tooth ring 9, and then turn the knob 3, the knob 3 drives the gear 11 to rotate through the rotating shaft 10, the gear 11 drives the two rack bodies 8 to move, the rack body 8 drives the front cylinder 1 and the rear cylinder 6 away from the middle cylinder 4 through the connecting block 5 until the required distance is reached, and then release the knob 3, the pressing block 13 is reset under the action of the spring 15, thereby driving the fixed rod 17 and the latch 18 to reset, and the latch 18 enters the tooth groove of the limiting tooth ring 9, thereby realizing the limit.

[0031] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A lens barrel adjustment mechanism, comprising a front barrel (1), a middle barrel (4) and a rear barrel (6), characterized in that: The adjacent ends of the front cylinder (1) and the rear cylinder (6) are both fixedly connected to an inner cylinder (7), and the middle cylinder (4) is sleeved on the outer surfaces of the two inner cylinders (7); One side of the outer surface of the middle cylinder (4) is fixedly connected to the shell (2), the inner side of the shell (2) is provided with a gear (11), the top and bottom of the gear (11) are meshedly connected to rack assemblies, and the two rack assemblies are both arranged through the shell (2), and the two rack assemblies are respectively fixedly connected to the adjacent front cylinder (1) and the rear cylinder (6); A rotating shaft (10) is fixedly connected to one side of the outer surface of the gear (11), and the rotating shaft (10) passes through the housing (2) and is rotatably connected thereto, and a knob (3) is fixedly connected to the other end of the rotating shaft (10); The knob (3) is symmetrically mounted with two spring pressing assemblies, and the movable ends of the two spring pressing assemblies are fixedly connected with latch teeth (18); One side of the outer surface of the housing (2) is fixedly connected to a limit toothed ring (9), and the latching teeth (18) match the limit toothed ring (9).

2. A lens barrel adjustment mechanism according to claim 1, characterized in that: The two rack assemblies each comprise a rack body (8), and the rack body (8) is disposed through the housing (2) and meshedly connected with the gear (11), one end of the rack body (8) is fixedly connected to a connecting block (5), and the connecting block (5) is fixedly connected to an adjacent front cylinder (1) and an adjacent rear cylinder (6).

3. A lens barrel adjustment mechanism according to claim 2, characterized in that: A slide rail (12) is slidably connected to one side of the outer surface of the rack body (8), and the slide rail (12) is fixedly connected to the housing (2).

4. The lens barrel adjustment mechanism according to claim 1, characterized in that: The two spring pressing assemblies both comprise a mounting groove (16), and the mounting groove (16) is provided on one side of the outer surface of the knob (3), and a travel groove (14) penetrating to the outer wall of the knob (3) is provided on one inner wall of the mounting groove (16).

5. A lens barrel adjustment mechanism according to claim 4, characterized in that: A spring (15) is fixedly mounted on an inner wall of one side of the mounting groove (16), and a pressing block (13) is fixedly connected to the other end of the spring (15), and the pressing block (13) is slidably connected to the mounting groove (16).

6. A lens barrel adjustment mechanism according to claim 5, characterized in that: A fixing rod (17) is fixedly connected to one side of the outer surface of the pressing block (13), and the fixing rod (17) matches the travel groove (14), and the fixing rod (17) is fixedly connected to the adjacent latch teeth (18).

7. The lens barrel adjustment mechanism according to claim 1, characterized in that: The middle cylinder (4) is sealingly and slidably sleeved on the outer surfaces of the two inner cylinders (7).

Images