Dual-motor automatic focusing zoom lens

Abstract

The utility model relates to the technical field of optical manufacturing, in particular to a dual-motor automatic focusing zoom lens, which comprises a mounting plate and a first fixed lens assembly mounted at the upper end of the front surface of the mounting plate; the second fixed lens assembly is mounted in the middle of the front surface of the mounting plate and is close to one side of the focusing lens assembly; the high-precision guide rail is bolted to the middle part of the front surface of the mounting plate; according to the utility model, the high-precision guide rail is arranged on the mounting plate, and the focusing lens assembly, the first zoom lens assembly and the second zoom lens assembly are in sliding fit on the high-precision guide rail through the sliding blocks, so that mechanical contact parts are prevented from being worn during zooming, the service life of the zoom lens is prolonged, and the adjustment precision of the zoom lens is improved; and meanwhile, the zoom and automatic focusing of the lens can be realized under the driving of the first driving assembly and the second driving assembly, the adjustment precision can be greatly improved in cooperation with the limit switch, mechanical collision during adjustment is avoided, and the service life of the zoom lens is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of optical manufacturing, in particular to a dual-motor automatic focus zoom lens. Background Art

[0002] A continuously variable zoom lens is a lens that continuously changes focal length. It utilizes two or more lens groups within an optical system to move linearly along a path defined by the optical design, thereby changing the combined focal length of the entire optical system. It is widely used in fields such as biology, medicine, industry, biotechnology, and microelectronics processing.

[0003] Existing continuously variable magnification lenses are generally composed of a fixed lens group and a movable lens group. Traditionally, the movable lens group is adjusted manually or moved to a specified position via a curved tube or curved axis to achieve magnification or focal length changes. However, existing continuously variable lenses have the following shortcomings: the movable lens group moves frequently, the mechanical contact points wear out faster, and the service life is short.

[0004] In addition, the existing continuous zoom lens is designed with a fixed front-end lens group. When it is installed on the equipment and there is a height difference between the required inspection products, the Z axis of the equipment needs to be moved for refocusing, which is more difficult to control. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a dual-motor autofocus zoom lens to solve the technical problems of limited space and inconvenient operation of the existing positioning and clamping tooling.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A dual-motor autofocus zoom lens, comprising: a mounting plate, and

[0008] a first fixed mirror assembly mounted on the upper front end of the mounting plate;

[0009] a second fixed mirror assembly, mounted on the middle of the front of the mounting plate and close to one side of the focusing mirror assembly;

[0010] A high-precision guide rail, bolted to the middle of the front of the mounting plate;

[0011] A focusing lens assembly, a first zoom lens assembly, and a second zoom lens assembly are all slidably connected to the front surface of the high-precision guide rail via a slider, the focusing lens assembly is located below the second fixed lens assembly, the first zoom lens assembly is located above the second zoom lens assembly, and the first zoom lens assembly and the second zoom lens assembly are both located above the second fixed lens assembly;

[0012] Two first drive assemblies are symmetrically fixedly connected to the upper end of the front surface of the mounting plate and are located on both sides of the high-precision guide rail for driving the corresponding first zoom lens assembly and second zoom lens assembly to move up and down;

[0013] A second driving assembly is fixedly connected to the front surface of the mounting plate and is located below the second fixed mirror assembly to drive the focusing mirror assembly to move up and down;

[0014] Three limit assemblies are bolted to the side of the mounting plate to limit the travel of the first drive assembly and the second drive assembly, two of which are symmetrically arranged on the outside of the two first drive assemblies, and the other limit assembly is arranged opposite to the second drive assembly.

[0015] Furthermore, the first fixed mirror assembly includes a first fixed seat, the first fixed seat is bolted to the mounting plate, the first fixed mirror seat is fixedly mounted in the middle of the first fixed seat, and the first lens is fixedly mounted inside the first fixed mirror seat.

[0016] Furthermore, the second fixed mirror assembly includes a second fixed seat, which is fixedly connected to the mounting plate, and a gap is provided in the middle of the rear end of the second fixed seat that is compatible with the high-precision guide rail, and a second fixed mirror seat is fixedly installed in the middle of the second fixed seat, and a second lens is fixedly installed inside the second fixed mirror seat.

[0017] Furthermore, the focusing lens assembly includes a focusing lens seat, a first connecting block is fixedly connected to the rear end of the upper surface of the focusing lens seat, a focusing lens is fixedly installed in the middle of the focusing lens seat, and the first connecting block is bolted to the front of the corresponding slider.

[0018] Furthermore, the first zoom lens assembly includes an L-shaped first connecting lens seat, the first connecting lens seat is bolted to the front of the corresponding slider, a third lens is fixedly installed in the middle of the first connecting lens seat, and a second connecting block is bolted to the right side of the first connecting lens seat.

[0019] Furthermore, the second zoom lens assembly includes a second connecting lens seat, the rear side of the second connecting lens seat is fixedly connected to a third connecting block, the middle part of the second connecting lens seat is fixedly installed with a fourth lens, and the third connecting block is bolted to the front side of the corresponding slider.

[0020] Furthermore, the two first drive components each include a first linear motor, the front end of the moving end of the first linear motor is fixedly connected to a first U-shaped seat, the open end cover of the first U-shaped seat is arranged on the outside of the moving end of the first linear motor, and a first spring is provided between the inner top wall of the first U-shaped seat and the moving end of the first linear motor, the front face of the first U-shaped seat on the right side is bolted to one end of the second connecting block, and the front face of the first U-shaped seat on the left side is bolted to one end of the third connecting block.

[0021] Furthermore, the second drive assembly includes a second linear motor, the front end of the moving end of the second linear motor is fixedly connected to a second U-shaped seat, the open end cover of the second U-shaped seat is arranged on the outside of the moving end of the second linear motor, a second spring is sleeved between the inner top wall of the second U-shaped seat and the moving end of the second linear motor, and the front face of the second U-shaped seat is bolted to one end of the first connecting block.

[0022] Furthermore, the three limit assemblies each include a fixing plate, and two symmetrically distributed mounting holes are provided in the middle of one end of the fixing plate away from the mounting plate, and the limit switches are fixedly installed inside the mounting holes.

[0023] Beneficial effects of the utility model:

[0024] The utility model provides a high-precision guide rail on the mounting plate and slidingly engages the focusing lens assembly, the first zoom lens assembly and the second zoom lens assembly on the high-precision guide rail through a slider, thereby avoiding wear of mechanical contact parts during zooming and improving the service life and adjustment accuracy of the zoom lens; at the same time, under the drive of the first drive assembly and the second drive assembly, the zoom and automatic focus of the lens can be achieved, and the combination with the limit switch can greatly improve the adjustment accuracy, avoid mechanical collision during adjustment, and greatly improve the service life of the zoom lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0027] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0028] Figure 3 This is a schematic diagram of the overall explosion structure of the utility model;

[0029] Figure 4 This is a schematic diagram of the exploded structure of the first drive assembly of the present invention;

[0030] Figure 5 This is a schematic diagram of the exploded structure of the second drive assembly of the present invention;

[0031] Figure 6 This is a schematic diagram of the exploded structure of the first zoom lens assembly of the present invention;

[0032] Figure 7 This is a schematic diagram of the exploded structure of the second zoom lens assembly of the present invention;

[0033] Figure 8 This is a schematic diagram of the explosion structure of the focusing lens assembly of the present utility model.

[0034] Description of the symbols in the figure: 1. Mounting plate; 2. First fixed mirror assembly; 201. First fixed seat; 202. First fixed mirror seat; 203. First lens; 3. Focusing mirror assembly; 301. Focusing lens seat; 302. Focusing lens; 303. First connecting block; 4. Second fixed mirror assembly; 401. Second fixed seat; 402. Second fixed mirror seat; 403. Second lens; 5. High-precision guide rail; 501. Slider; 6. First zoom lens assembly; 601. First connecting mirror Seat; 602, second connecting block; 603, third lens; 7, second zoom lens assembly; 701, second connecting lens seat; 702, third connecting block; 703, fourth lens; 8, first drive assembly; 801, first linear motor; 802, first U-shaped seat; 803, first spring; 9, second drive assembly; 901, second linear motor; 902, second U-shaped seat; 903, second spring; 10, fixing plate; 101, mounting hole; 102, limit switch. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0037] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0038] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0039] See also Figure 1-8 As shown, a dual-motor autofocus zoom lens comprises: a mounting plate 1, and a first fixed mirror assembly 2, mounted on the upper end of the front of the mounting plate 1; a second fixed mirror assembly 4, mounted on the middle of the front of the mounting plate 1 and close to one side of the focusing mirror assembly 3; a high-precision guide rail 5, bolted to the middle of the front of the mounting plate 1; the focusing mirror assembly 3, the first zoom mirror assembly 6 and the second zoom mirror assembly 7, all of which are slidably connected to the front of the high-precision guide rail 5 through a slider 501, the focusing mirror assembly 3 is located below the second fixed mirror assembly 4, the first zoom mirror assembly 6 is located above the second zoom mirror assembly 7, and the first zoom mirror assembly 6 and the second zoom mirror assembly 7 are both located in the second Above the fixed mirror assembly 4; two first drive assemblies 8, respectively symmetrically fixedly connected to the upper end of the front side of the mounting plate 1 and located on both sides of the high-precision guide rail 5, for driving the corresponding first zoom mirror assembly 6 and second zoom mirror assembly 7 to move up and down; a second drive assembly 9, fixedly connected to the front side of the mounting plate 1 and located on the lower side of the second fixed mirror assembly 4, for driving the focusing mirror assembly 3 to move up and down; three limit assemblies, all bolted to the side of the mounting plate 1, for limiting the stroke of the first drive assembly 8 and the second drive assembly 9, wherein two limit assemblies are symmetrically arranged on the outside of the two first drive assemblies 8, and the other limit assembly is arranged opposite to the second drive assembly 9.

[0040] By arranging a high-precision guide rail 5 on the mounting plate 1 and slidingly fitting the focusing lens assembly 3, the first zoom lens assembly 6 and the second zoom lens assembly 7 on the high-precision guide rail 5 through the slider 501, wear of the mechanical contact parts can be avoided when the lens is readjusted, thereby improving the adjustment accuracy; at the same time, automatic focusing and zooming of the lens can be achieved under the drive of the first drive assembly 8 and the second drive assembly 9, and the adjustment accuracy can be greatly improved by cooperating with the limit assembly, thereby avoiding mechanical collision during adjustment.

[0041] Specifically, if Figure 3As shown, the first fixed mirror assembly 2 includes a first fixed seat 201, the first fixed seat 201 is bolted to the mounting plate 1, the middle part of the first fixed seat 201 is fixedly mounted with a first fixed mirror seat 202, and the interior of the first fixed mirror seat 202 is fixedly mounted with a first lens 203; by firmly bolting the first fixed seat 201 to the mounting plate 1, the positions of the first fixed mirror seat 202 and the first lens 203 are fixed.

[0042] Specifically, such as Figure 3 As shown, the second fixed mirror assembly 4 includes a second fixed seat 401, the second fixed seat 401 is fixedly connected to the mounting plate 1, and a gap is provided in the middle of the rear end of the second fixed seat 401 that is compatible with the high-precision guide rail 5. A second fixed mirror seat 402 is fixedly installed in the middle of the second fixed seat 401, and a second lens 403 is fixedly installed inside the second fixed mirror seat 402; the gap at the rear end of the second fixed seat 401 is rectangular, and the high-precision guide rail 5 passes through the gap, and is fixed to the mounting plate 1 through the second fixed seat 401, so that the positions of the second fixed mirror seat 402 and the second lens 403 are fixed.

[0043] Specifically, such as Figure 3 and Figure 8 As shown, the focusing lens assembly 3 includes a focusing lens seat 301, a first connecting block 303 is fixedly connected to the rear end of the upper surface of the focusing lens seat 301, a focusing lens 302 is fixedly installed in the middle part of the focusing lens seat 301, and the first connecting block 303 is bolted to the front side of the corresponding slider 501; wherein the right end of the first connecting block 303 is provided with a connecting plate located in front of the second U-shaped seat 902, and the left end of the first connecting block 303 is provided with a contact portion that contacts the corresponding limit switch 102.

[0044] Specifically, such as Figure 1 、 Figure 2 、 Figure 3 and Figure 6 As shown, the first zoom lens assembly 6 includes an L-shaped first connecting lens seat 601, the first connecting lens seat 601 is bolted to the front of the corresponding slider 501, the middle of the first connecting lens seat 601 is fixedly installed with a third lens 603, and the right side of the first connecting lens seat 601 is bolted with a second connecting block 602; the first connecting lens seat 601 is bolted to the corresponding slider 501, and at the same time, a connecting plate bolted to the first U-shaped seat 802 on the right side is provided on the right side of the second connecting block 602, so that the first driving assembly 8 on the right side can drive the second connecting block 602 to move up and down, wherein the right end of the connecting plate can contact the limit switch 102 on the same side.

[0045] Specifically, such as Figure 1 、 Figure 2 、 Figure 3 and Figure 7As shown, the second zoom lens assembly 7 includes a second connecting lens base 701, a third connecting block 702 is fixedly connected to the rear side of the second connecting lens base 701, a fourth lens 703 is fixedly installed in the middle of the second connecting lens base 701, and the third connecting block 702 is bolted to the front of the corresponding slider 501; wherein the left end of the third connecting block 702 is provided with a connecting plate connected to the first U-shaped base 802 on the left side, and the connecting plate is in contact with the limit switch 102 on the same side, and the second connecting lens base 701 is driven to move up and down through the first driving assembly 8 on the left side.

[0046] Specifically, such as Figure 3 and Figure 4 As shown, the two first drive assemblies 8 both include a first linear motor 801, the front end of the moving end of the first linear motor 801 is fixedly connected to the first U-shaped seat 802, the open end cover of the first U-shaped seat 802 is arranged on the outside of the moving end of the first linear motor 801, and a first spring 803 is sleeved between the inner top wall of the first U-shaped seat 802 and the moving end of the first linear motor 801, the front face of the first U-shaped seat 802 on the right is bolted to one end of the second connecting block 602, and the front face of the first U-shaped seat 802 on the left is bolted to one end of the third connecting block 702; wherein the moving ends of the two first linear motors 801 are staggered, with the moving end on the right at the top and the moving end on the left at the bottom; by arranging the first U-shaped seat 802 and the first spring 803 between the inside thereof and the moving end of the first linear motor 801, the first spring 803, the first U-shaped seat 802 and the corresponding connecting block and the corresponding zoom lens assembly are softly connected.

[0047] Specifically, such as Figure 1 、 Figure 2 、 Figure 3 and Figure 5 As shown, the second drive assembly 9 includes a second linear motor 901, and the front end of the moving end of the second linear motor 901 is fixedly connected to the second U-shaped seat 902, and the open end cover of the second U-shaped seat 902 is arranged on the outside of the moving end of the second linear motor 901. A second spring 903 is sleeved between the inner top wall of the second U-shaped seat 902 and the moving end of the second linear motor 901, and the front of the second U-shaped seat 902 is bolted to one end of the first connecting block 303; by setting the second U-shaped seat 902 and the second spring 903 between its interior and the moving end of the second linear motor 901, a soft connection is made with the corresponding connecting block and the corresponding focusing lens assembly 3 through the second spring 903 and the second U-shaped seat 902.

[0048] Specifically, the three limit assemblies all include a fixed plate 10, which has two symmetrically distributed mounting holes 101 in the middle of one end of the fixed plate 10 away from the mounting plate 1, and a limit switch 102 is fixedly installed inside the mounting hole 101; the three fixed plates 10 are the same except for their different lengths, two of which are bolted to the two sides of the upper end of the mounting plate 1, and the other fixed plate 10 is bolted to the left side of the lower end of the mounting plate 1, the two limit switches 102 below correspond to the connecting plates on the first connecting block 303; the two limit switches 102 on the upper left correspond to the connecting plates on the third connecting block 702; the two limit switches 102 on the upper right correspond to the connecting plates on the second connecting block 602; with the cooperation of the limit switch 102 and the linear motor, the focusing lens assembly 3 and the zoom lens assembly can be adjusted more accurately.

[0049] In summary, compared with the existing technology, the utility model avoids wear of mechanical contact parts during zooming by arranging a high-precision guide rail 5 on the mounting plate 1 and slidingly fitting the focusing lens assembly 3, the first zoom lens assembly 6 and the second zoom lens assembly 7 on the high-precision guide rail 5 through the slider 501, thereby improving the service life and adjustment accuracy of the zoom lens; at the same time, under the drive of the first drive assembly 8 and the second drive assembly 9, automatic zooming and focusing of the lens can be achieved, and at the same time, in conjunction with the limit switch 102, the adjustment accuracy can be greatly improved, mechanical collision during adjustment can be avoided, and the service life of the zoom lens is greatly improved.

[0050] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A dual-motor autofocus zoom lens, characterized in that: comprising: a mounting plate (1), and A first fixed mirror assembly (2) is mounted on the upper front end of the mounting plate (1); A second fixed mirror assembly (4) is mounted on the middle of the front of the mounting plate (1) and close to one side of the focusing mirror assembly (3); A high-precision guide rail (5) is bolted to the middle of the front side of the mounting plate (1); A focusing mirror assembly (3), a first zoom mirror assembly (6) and a second zoom mirror assembly (7) are all slidably connected to the front of the high-precision guide rail (5) via a slider (501); the focusing mirror assembly (3) is located below the second fixed mirror assembly (4); the first zoom mirror assembly (6) is located above the second zoom mirror assembly (7); and both the first zoom mirror assembly (6) and the second zoom mirror assembly (7) are located above the second fixed mirror assembly (4); Two first drive assemblies (8) are symmetrically fixedly connected to the upper front end of the mounting plate (1) and are located on both sides of the high-precision guide rail (5) for driving the corresponding first zoom lens assembly (6) and second zoom lens assembly (7) to move up and down; A second driving assembly (9) is fixedly connected to the front surface of the mounting plate (1) and is located below the second fixed mirror assembly (4) to drive the focusing mirror assembly (3) to move up and down; Three limit assemblies are bolted to the side of the mounting plate (1) and are used to limit the travel of the first drive assembly (8) and the second drive assembly (9), wherein two of the limit assemblies are symmetrically arranged on the outside of the two first drive assemblies (8), and the other limit assembly is arranged opposite to the second drive assembly (9).

2. The dual-motor autofocus zoom lens according to claim 1, characterized in that: The first fixed mirror assembly (2) comprises a first fixed seat (201), the first fixed seat (201) is bolted to the mounting plate (1), a first fixed mirror seat (202) is fixedly mounted in the middle of the first fixed seat (201), and a first lens (203) is fixedly mounted inside the first fixed mirror seat (202).

3. The dual-motor autofocus zoom lens according to claim 1, characterized in that: The second fixed mirror assembly (4) comprises a second fixed seat (401), the second fixed seat (401) is fixedly connected to the mounting plate (1), a gap adapted to the high-precision guide rail (5) is provided in the middle of the rear end of the second fixed seat (401), a second fixed mirror seat (402) is fixedly mounted in the middle of the second fixed seat (401), and a second lens (403) is fixedly mounted inside the second fixed mirror seat (402).

4. The dual-motor autofocus zoom lens according to claim 1, characterized in that: The focusing lens assembly (3) comprises a focusing lens seat (301), a first connecting block (303) is fixedly connected to the rear end of the upper surface of the focusing lens seat (301), a focusing lens (302) is fixedly installed in the middle of the focusing lens seat (301), and the first connecting block (303) is bolted to the front side of the corresponding slider (501).

5. The dual-motor autofocus zoom lens according to claim 1, wherein: The first zoom lens assembly (6) comprises an L-shaped first connecting lens seat (601), the first connecting lens seat (601) being bolted to the front of the corresponding slider (501), a third lens (603) being fixedly mounted in the middle of the first connecting lens seat (601), and a second connecting block (602) being bolted to the right side of the first connecting lens seat (601).

6. The dual-motor autofocus zoom lens according to claim 1, characterized in that: The second zoom lens assembly (7) comprises a second connecting lens seat (701), a third connecting block (702) is fixedly connected to the rear side of the second connecting lens seat (701), a fourth lens (703) is fixedly mounted in the middle of the second connecting lens seat (701), and the third connecting block (702) is bolted to the front side of the corresponding slider (501).

7. The dual-motor autofocus zoom lens according to claim 1, characterized in that: The two first drive assemblies (8) each include a first linear motor (801), the front end of the moving end of the first linear motor (801) is fixedly connected to a first U-shaped seat (802), the open end cover of the first U-shaped seat (802) is arranged outside the moving end of the first linear motor (801), a first spring (803) is sleeved between the inner top wall of the first U-shaped seat (802) and the moving end of the first linear motor (801), the front face of the first U-shaped seat (802) on the right side is bolted to one end of the second connecting block (602), and the front face of the first U-shaped seat (802) on the left side is bolted to one end of the third connecting block (702).

8. The dual-motor autofocus zoom lens according to claim 1, wherein: The second driving assembly (9) includes a second linear motor (901), the front end of the movable end of the second linear motor (901) is fixedly connected to a second U-shaped seat (902), the open end cover of the second U-shaped seat (902) is arranged outside the movable end of the second linear motor (901), a second spring (903) is sleeved between the inner top wall of the second U-shaped seat (902) and the movable end of the second linear motor (901), and the front face of the second U-shaped seat (902) is bolted to one end of the first connecting block (303).

9. The dual-motor autofocus zoom lens according to claim 1, characterized in that: The three limit assemblies all comprise a fixing plate (10), wherein two symmetrically distributed mounting holes (101) are provided in the middle of one end of the fixing plate (10) away from the mounting plate (1), and a limit switch (102) is fixedly mounted inside the mounting hole (101).

Images