Automatic focusing mechanism

Abstract

The utility model relates to an automatic focusing mechanism, which comprises an L-shaped fixed seat, a voice coil motor and an L-shaped sliding seat, the vertical end of the L-shaped fixed seat is provided with a first through hole for placing an eyepiece, the horizontal end of the L-shaped fixed seat is provided with a fixed block, and the top of the fixed block is connected with the horizontal end of the L-shaped sliding seat through a sliding assembly. The vertical end of the L-shaped sliding seat is provided with a second through hole used for placing an objective lens, the second through hole corresponds to the first through hole, the voice coil motor is installed at the vertical end of the L-shaped fixed seat and located below the first through hole, and the driving end of the voice coil motor is connected with the L-shaped sliding seat through a fixed plate. And the voice coil motor is used for driving the L-shaped sliding seat to horizontally move along the fixed block. The automatic focusing mechanism not only realizes automatic focusing, but also improves the accuracy and efficiency of focusing.

Description

Technical Field

[0001] The utility model relates to the technical field of focusing, in particular to an automatic focusing mechanism. Background Art

[0002] The existing focusing mechanism is usually manually adjusted by hand, and the naked eye judges whether the product is focused based on the clarity of the target. This manual focusing method is not only labor-intensive but also easily fatigues the eyes, which can easily affect the accuracy and efficiency of focusing. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an automatic focusing mechanism, which not only realizes automatic focusing but also improves the accuracy and efficiency of focusing.

[0004] The utility model solves the technical problem by adopting the following technical solution: an automatic focusing mechanism, comprising an L-shaped fixed seat, a voice coil motor and an L-shaped sliding seat, wherein a first through hole for placing an eyepiece is provided at the vertical end of the L-shaped fixed seat, a fixed block is provided at the horizontal end of the L-shaped fixed seat, the top of the fixed block is connected to the horizontal end of the L-shaped sliding seat via a sliding assembly, a second through hole for placing an objective lens is provided at the vertical end of the L-shaped sliding seat, the second through hole corresponding to the first through hole, the voice coil motor is mounted on the vertical end of the L-shaped fixed seat and located below the first through hole, the driving end of the voice coil motor is connected to the L-shaped sliding seat via a fixing plate, and the voice coil motor is used to drive the L-shaped sliding seat to move horizontally along the fixed block.

[0005] In one embodiment, a displacement sensor for detecting the moving distance of the L-shaped sliding seat is provided at the horizontal end of the L-shaped fixed seat of the automatic focusing mechanism, and the displacement sensor is located on one side of the L-shaped sliding seat.

[0006] In one embodiment, the voice coil motor of the automatic focusing mechanism includes a cylindrical shell, a permanent magnet, a mover and a coil. The cylindrical shell is connected to the L-shaped fixed seat through a connecting plate. The permanent magnet is installed at the axis inside the cylindrical shell. The coil is wound on the mover. The mover is sleeved on the permanent magnet and does not contact the permanent magnet. A gap is provided between the cylindrical shell and the permanent magnet for the mover and the coil to slide. The end of the mover away from the cylindrical shell is connected to the L-shaped sliding seat.

[0007] In one embodiment, a limit plate is horizontally arranged on the top of the fixed plate of the automatic focusing mechanism, and the limit plate is located between the L-shaped sliding seat and the L-shaped fixed seat. The limit plate is used to limit the mover of the voice coil motor and the L-shaped fixed seat.

[0008] In one embodiment, an arc-shaped limit block for limiting the moving distance of the voice coil motor is provided on the fixed block of the automatic focusing mechanism, and the arc-shaped limit block is arranged opposite to the fixed plate.

[0009] In one embodiment, a first notch and a first adjusting bolt are provided on the L-shaped fixing seat of the automatic focusing mechanism. The first notch is communicated with the first through hole. The first adjusting bolt is used to lock and adjust the first notch.

[0010] In one embodiment, a second notch and a second adjusting bolt are provided on the L-shaped sliding seat of the automatic focusing mechanism. The second notch is communicated with the second through hole. The second adjusting bolt is used to lock and adjust the second notch.

[0011] The beneficial effects of this application are:

[0012] The present application provides an automatic focusing mechanism that realizes automatic focusing by driving an L-shaped sliding seat with an objective lens to move horizontally through a voice coil motor. The automatic focusing mechanism not only realizes automatic focusing but also improves focusing accuracy and efficiency.

[0013] The automatic focusing mechanism uses a displacement sensor to detect the moving distance of the L-shaped sliding seat to ensure the accuracy of focusing.

[0014] The automatic focusing mechanism uses a voice coil motor to drive the L-shaped sliding seat to move horizontally for focusing, which greatly improves the focusing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of an automatic focusing mechanism according to an embodiment of the present application from one viewing angle;

[0016] Figure 2 A schematic diagram of the automatic focusing mechanism according to an embodiment of the present application from another perspective;

[0017] Figure 3 A schematic diagram of a voice coil motor of an automatic focusing mechanism according to an embodiment of the present application;

[0018] Figure 4 A cross-sectional view of a voice coil motor of an automatic focusing mechanism according to an embodiment of the present application;

[0019] Figure 5 A schematic diagram of a mover and a coil of a voice coil motor of an automatic focusing mechanism according to an embodiment of the present application;

[0020] Figure 6 A schematic diagram of a cylindrical housing of a voice coil motor of an automatic focusing mechanism according to an embodiment of the present application;

[0021] in:

[0022] 1. L-shaped fixing seat; 2. Voice coil motor; 3. L-shaped sliding seat; 4. Displacement sensor; 11. First through hole; 12. Fixing block; 13. Sliding assembly; 14. Arc-shaped limit block; 15. First notch; 16. First adjusting bolt; 21. Cylindrical shell; 22. Permanent magnet; 23. Mover; 24. Coil; 25. Connecting plate; 26. Limiting plate; 31. Second through hole; 32. Second notch; 33. Second adjusting bolt; 34. Fixing plate. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0024] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides an automatic focusing mechanism, including an L-shaped fixed seat 1, a voice coil motor 2 and an L-shaped sliding seat 3. The vertical end of the L-shaped fixed seat 1 is provided with a first through hole 11 for placing an eyepiece, and the horizontal end of the L-shaped fixed seat 1 is provided with a fixed block 12. The top of the fixed block 12 is connected to the horizontal end of the L-shaped sliding seat 3 through a sliding assembly 13. The vertical end of the L-shaped sliding seat 3 is provided with a second through hole 31 for placing an objective lens, and the second through hole 31 corresponds to the first through hole 11. The voice coil motor 2 is installed on the vertical end of the L-shaped fixed seat 1 and is located below the first through hole 11. The driving end of the voice coil motor 2 is connected to the L-shaped sliding seat 3 through a fixing plate 34. The voice coil motor 2 is used to drive the L-shaped sliding seat 3 to move horizontally along the fixed block 12.

[0025] Specifically, rotate the first adjusting bolt 16 to loosen the first notch 15, and place the eyepiece in the first through hole 11 of the L-shaped fixing seat 1. Rotate the second adjusting bolt 33 to loosen the second notch 32, and place the objective lens in the second through hole 31 of the L-shaped sliding seat. The eyepiece corresponds to the position of the objective lens. A third through hole is provided at the lower end of the vertical end of the L-shaped fixing seat 1, and the cylindrical shell 21 of the voice coil motor 2 is fixed in the third through hole through the connecting plate 25. One end of the mover 23 of the voice coil motor 2 is connected to the L-shaped sliding seat 3, and the voice coil motor 2 drives the L-shaped sliding seat 3 to move the objective lens horizontally along the fixed block 12 on the L-shaped fixing seat 1 to adjust the distance between the objective lens and the eyepiece, thereby realizing automatic focusing.

[0026] In the above structure, automatic focusing is achieved by providing a voice coil motor 2 to drive the L-shaped sliding seat 3 to move the objective lens horizontally. This automatic focusing mechanism not only achieves automatic focusing, but also improves the accuracy and efficiency of focusing.

[0027] like Figure 1 and Figure 2As shown in the drawings, in one embodiment, the horizontal end of the L-shaped fixing base 1 of the automatic focusing mechanism is provided with a displacement sensor 4 for detecting the moving distance of the L-shaped sliding base 3, and the displacement sensor 4 is located on one side of the L-shaped sliding base 3. The arrangement of the displacement sensor 4 facilitates the detection of the moving distance of the L-shaped sliding base 3 and the objective lens, ensuring the accuracy of focusing.

[0028] As shown in the drawings, Figure 3-Figure 6 As shown in the drawings, in one embodiment, the voice coil motor 2 of the automatic focusing mechanism includes a cylindrical shell 21, a permanent magnet 22, a mover 23 and a coil 24, the cylindrical shell 21 is connected with the L-shaped fixing base 1 through a connecting plate 25, the permanent magnet 22 is installed at the axis of the inside of the cylindrical shell 21, the coil 24 is wound on the mover 23, the mover 23 is sleeved on the permanent magnet 22 and does not contact with the permanent magnet 22, a gap is provided between the cylindrical shell 21 and the permanent magnet 22 for the sliding of the mover 23 and the coil 24, and the end of the mover 23 away from the cylindrical shell 21 is connected with the L-shaped sliding base 3. The mover 23 is in a cylindrical structure, the coil 24 is wound on the mover 23, when the mover 23 extends into the gap between the cylindrical shell and the permanent magnet 22, the magnetic field generated by the permanent magnet 22 and the magnetic field generated by the coil 24 interact with each other, the mover 23 and the coil 24 move horizontally, so that the mover 23 drives the L-shaped sliding base 3 to move horizontally. This arrangement facilitates the driving of the L-shaped sliding base 3 to move the objective lens horizontally, adjusts the distance between the objective lens and the ocular lens, thereby improving the focusing efficiency.

[0029] As shown in the drawings, Figure 1 and Figure 5 As shown in the drawings, in one embodiment, a limiting plate 26 is horizontally arranged on the top of the fixing plate 34 of the automatic focusing mechanism, the limiting plate 26 is located between the L-shaped sliding base 3 and the L-shaped fixing base 1, and the limiting plate 26 is used for limiting the mover 23 of the voice coil motor 2 and the L-shaped fixing base 1. This arrangement can prevent the mover 23 of the voice coil motor 2 from moving excessively and colliding with the L-shaped fixing base 1.

[0030] As shown in the drawings, Figure 2 As shown in the drawings, in one embodiment, an arc-shaped limiting block 14 is arranged on the fixing block 12 of the automatic focusing mechanism for limiting the moving distance of the voice coil motor 2, and the arc-shaped limiting block 14 is arranged opposite to the fixing plate 34. The arrangement of the arc-shaped limiting block 14 can limit the maximum moving distance of the L-shaped sliding base 3, preventing excessive movement.

[0031] As shown in the drawings, Figure 1 and Figure 2As shown, in one embodiment, the L-shaped fixing base 1 of the autofocus mechanism is provided with a first notch 15 and a first adjustment bolt 16. The first notch 15 is connected to the first through-hole 11, and the first adjustment bolt 16 is used to lock and adjust the first notch 15. When the eyepiece needs to be placed in the first through-hole 11, the first adjustment bolt 16 is rotated to loosen the first notch 15. After the eyepiece is placed, the first adjustment bolt 16 is rotated to tighten the first notch 15, securing the eyepiece in the first through-hole 11. This arrangement facilitates the installation and removal of the eyepiece.

[0032] like Figure 1 and Figure 2 As shown, in one embodiment, the L-shaped sliding seat 3 of the autofocus mechanism is provided with a second notch 32 and a second adjustment bolt 33. The second notch 32 is connected to the second through hole 31, and the second adjustment bolt 33 is used to lock and adjust the second notch 32. When the objective lens needs to be placed in the second through hole 31, the second adjustment bolt 33 is rotated to loosen the second notch 32. After the objective lens is placed, the second adjustment bolt 33 is rotated to tighten the second notch 32, securing the objective lens in the second through hole 31. This arrangement facilitates the assembly and disassembly of the objective lens.

[0033] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. An automatic focusing mechanism, characterized in that: The invention comprises an L-shaped fixed seat (1), a voice coil motor (2) and an L-shaped sliding seat (3), wherein the vertical end of the L-shaped fixed seat (1) is provided with a first through hole (11) for placing an eyepiece, the horizontal end of the L-shaped fixed seat (1) is provided with a fixed block (12), the top of the fixed block (12) is connected to the horizontal end of the L-shaped sliding seat (3) through a sliding assembly (13), the vertical end of the L-shaped sliding seat (3) is provided with a second through hole (31) for placing an objective lens, the second through hole (31) corresponds to the first through hole (11), the voice coil motor (2) is installed on the vertical end of the L-shaped fixed seat (1) and is located below the first through hole (11), the driving end of the voice coil motor (2) is connected to the L-shaped sliding seat (3) through a fixing plate (34), and the voice coil motor (2) is used to drive the L-shaped sliding seat (3) to move horizontally along the fixed block (12).

2. The automatic focusing mechanism according to claim 1, wherein: A displacement sensor (4) for detecting the moving distance of the L-shaped sliding seat (3) is provided at the horizontal end of the L-shaped fixed seat (1); the displacement sensor (4) is located on one side of the L-shaped sliding seat (3).

3. The automatic focusing mechanism according to claim 1, wherein: The voice coil motor (2) comprises a cylindrical shell (21), a permanent magnet (22), a mover (23) and a coil (24); the cylindrical shell (21) is connected to the L-shaped fixed seat (1) via a connecting plate (25); the permanent magnet (22) is mounted at the axis inside the cylindrical shell (21); the coil (24) is wound around the mover (23); the mover (23) is sleeved on the permanent magnet (22) and does not contact the permanent magnet (22); a gap is provided between the cylindrical shell (21) and the permanent magnet (22) for the mover (23) and the coil (24) to slide; and one end of the mover (23) away from the cylindrical shell (21) is connected to the L-shaped sliding seat (3).

4. The automatic focusing mechanism according to claim 3, wherein: A limit plate (26) is horizontally arranged on the top of the fixing plate (34), and the limit plate (26) is located between the L-shaped sliding seat (3) and the L-shaped fixing seat (1). The limit plate (26) is used to limit the mover (23) of the voice coil motor (2) and the L-shaped fixing seat (1).

5. The automatic focusing mechanism according to claim 1, wherein: The fixed block (12) is provided with an arc-shaped limiting block (14) for limiting the moving distance of the voice coil motor (2), and the arc-shaped limiting block (14) is arranged relative to the fixed plate (34).

6. The automatic focusing mechanism according to claim 1, wherein: The L-shaped fixing seat (1) is provided with a first notch (15) and a first adjusting bolt (16); the first notch (15) is communicated with the first through hole (11); and the first adjusting bolt (16) is used to lock and adjust the first notch (15).

7. The automatic focusing mechanism according to claim 1, wherein: The L-shaped sliding seat (3) is provided with a second notch (32) and a second adjusting bolt (33); the second notch (32) is communicated with the second through hole (31); and the second adjusting bolt (33) is used to lock and adjust the second notch (32).

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