Dual-motor electric zoom lens

Abstract

The utility model provides a dual-motor electric zoom lens, and particularly relates to the technical field of optical instruments, the dual-motor electric zoom lens comprises a base, a lens group and a linear guide rail, the inner wall of the base is provided with two extending parts towards the center; the two linear guide rails are arranged on one sides of the two extending parts respectively, sliding seats are fixed to two sliding blocks of the linear guide rails, protruding parts are arranged on the sliding seats, fixing grooves are formed in the protruding parts, the two lens sets are fixed to the protruding parts respectively, and the protruding parts of the sliding seats are located between the two extending parts; two linear motors are arranged on the other sides of the two extending parts respectively, the output ends of the two linear motors are fixedly connected with the side faces of the two sliding seats respectively, and the lens set is adjusted and moved on the linear guide rails in the base through the linear motors. And the lens group is moved on the sliding rail in cooperation with the linear motor, the abrasion condition is avoided, and the moving precision of the lens group is higher through closed-loop control of the linear motor and the grating ruler.

Description

Technical Field

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

[0002] A continuously zoom lens is a lens that can continuously change its focal length. It uses two or more lenses in an optical system to move linearly along a given optical path to change the combined focal length of the entire optical system. Continuously zoom lenses are widely used in biology, medicine, industry, biology, microelectronics processing and other fields.

[0003] Existing continuously zooming lenses are usually composed of a fixed lens and a movable lens group. Traditionally, the movable lens group is adjusted manually or moved to a specified position through a curved tube or a curved axis to achieve magnification or focal length changes. However, since the lens group moves frequently during operation, the mechanical contact position is prone to accelerated wear, which leads to a reduced service life. Utility Model Content

[0004] In order to solve the problem that the lens group of a continuous zoom lens is frequently moved and thus the service life is reduced, the utility model provides a dual-motor electric zoom lens.

[0005] The utility model is realized by the following technical solutions:

[0006] The utility model proposes a dual-motor electric zoom lens comprising a base, a lens group and a linear guide rail, wherein:

[0007] The inner wall of the base is provided with two extensions toward the center;

[0008] The linear guide rails are provided with two and are respectively provided on one side of the two extension parts of the base, the two linear guide rails are fixedly connected to the base, the linear guide rails include two sliders, a sliding seat is fixed on the two sliders of the linear guide rails, a grating ruler is provided on the sliding seat, the two sliding seats are respectively fixed on the sliders of the two linear guide rails, a convex portion is provided on the sliding seat, a fixing groove is provided on the convex portion and two lens groups are respectively fixed, and the convex portion of the sliding seat is located between the two extension parts;

[0009] Two linear motors are respectively provided on the other side of the two extension parts of the base. The two linear motors are fixed on the base. The output ends of the two linear motors are respectively fixedly connected to the two sides of the sliding seats. The lens group is adjusted and moved on the linear guide rails in the base by the linear motors.

[0010] Furthermore, it also includes a motor fixing seat, and the two linear motors are respectively fixed to the two sides of the inner wall of the base through the two motor fixing seats.

[0011] Furthermore, it also includes a connecting member, which is arranged on one side of the linear motor on the base, and the two output ends of the linear motor are fixedly connected to the sliding seat through the two connecting members.

[0012] Furthermore, it also includes a fixed mirror group, and the two fixed mirror groups are respectively arranged on the top of the base and the top of the base and are fixedly connected to the base.

[0013] Furthermore, it also includes a grating reading head, two of the grating reading heads are arranged on one side of the two linear guide rails, and the grating reading heads are fixedly connected to the base.

[0014] Furthermore, it also includes limit switches, and four limit switches are provided, and the four limit switches are respectively arranged one at the top and one at the bottom of the two sliding seats.

[0015] Furthermore, it also includes a fixed plate, which has four mounting grooves on the side away from the linear motor, the limit switch is arranged on the mounting groove of the fixed plate and is fixedly connected to the base through the fixed plate, and the grating reading head is arranged on the side of the fixed plate close to the linear motor and is fixedly connected to the base through the fixed plate.

[0016] Furthermore, it also includes a control circuit board, which is located outside the fixed plate and fixedly connected to the base. The base is also provided with a wire hole, and the control wire is connected to the control circuit board through the wire hole.

[0017] Furthermore, the wire bonding plate is located on the base close to the outer side of the linear motor, and the wire bonding plate is fixedly connected to the base.

[0018] Furthermore, it also includes a front cover plate and a rear cover plate, wherein the front cover plate and the rear cover plate are respectively fixed to two sides of the base and close the base.

[0019] Beneficial effects of the utility model:

[0020] (1) The dual-motor electric zoom lens proposed by the utility model utilizes two linear slides to fix two lens groups respectively. The linear motor drives the lens group to move on the two linear slides, and the position of the lens group is controlled by a closed loop of a grating scale on the sliding seat, thereby completing the zoom of the lens. The linear motor and the linear slide cooperate to drive the lens group to move and focus. Compared with the traditional zoom lens that uses gear transmission to make the lens group in the lens barrel move linearly, the lens group will not tilt to cause poor imaging, and the movement accuracy of the lens group is higher.

[0021] (2) The dual-motor electric zoom lens proposed in the present invention adds limit switches at both ends of the movement of the lens group. Compared with the traditional zoom lens that uses impact on the lens barrel to determine the travel of the lens group, the present invention is less likely to cause damage to the lens barrel.

[0022] (3) The dual-motor electric zoom lens proposed by the utility model integrates the circuit into the entire zoom lens, and the control circuit board performs an integrated control system. Only one connecting line is needed to connect to the host computer, and no external board and extra connecting lines are required. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The utility model provides an exploded view of a dual-motor electric zoom lens;

[0024] Figure 2 The utility model provides an overall structural diagram of a dual-motor electric zoom lens;

[0025] Figure 3 A cross-sectional view of a dual-motor electric zoom lens proposed in the utility model;

[0026] Figure 4 The utility model proposes a schematic diagram of the structure of a linear motor for a dual-motor electric zoom lens;

[0027] Figure 5 A schematic diagram of the linear guide structure of a dual-motor electric zoom lens is provided for the utility model;

[0028] In the figure: base 1, extension 2, linear guide 3, linear motor 4, sliding seat 5, fixed mirror group 6, grating reading head 7, limit switch 8, fixing plate 9, control circuit board 10, welding wire board 11, front cover plate 12, rear cover plate 13, lens group 14;

[0029] The realization of the purpose, functional features and advantages of the present invention will be further described in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] In order to more clearly and completely illustrate the technical solution of the present invention, the present invention is further described below in conjunction with the accompanying drawings.

[0031] Please refer to Figure 1-Figure 5 The utility model proposes a dual-motor electric zoom lens comprising a base 1, a lens group 14 and a linear guide 3, wherein:

[0032] The inner wall of the base 1 is provided with two extensions 2 toward the center;

[0033] Two linear guide rails 3 are provided and are respectively arranged on one side of the two extension parts 2 of the base 1. The two linear guide rails 3 are fixedly connected to the base 1. The linear guide rail 3 includes two sliders. A sliding seat 5 is fixed on the two sliders of the linear guide rail 3. A grating ruler is arranged on the sliding seat 5. The two sliding seats 5 are respectively fixed on the sliders of the two linear guide rails 3. A convex portion is arranged on the sliding seat 5. A fixing groove is arranged on the convex portion and two lens groups 14 are fixed respectively. The convex portion of the sliding seat 5 is located between the two extension parts 2.

[0034] Two linear motors 4 are respectively provided on the other side of the two extension parts 2 of the base 1. The two linear motors 4 are fixed on the base 1. The output ends of the two linear motors 4 are respectively fixedly connected to the sides of the two sliding seats 5. The lens group 14 is adjusted and moved on the linear guide rail 3 in the base 1 through the linear motor 4.

[0035] In this embodiment:

[0036] The base 1 is used to accommodate and fix components;

[0037] The linear guide rail 3 is used to restrict the lens group 14 within the base 1 and enable the lens group 14 to move only on the guide rail;

[0038] The linear motor 4 is used to drive the lens group 14 to move;

[0039] The sliding seat 5 is used to connect the lens group 14 and the linear guide rail 3;

[0040] In a specific embodiment, the base 1 is square, and there is an extension part 2 extending toward the center on the left and right sides of the inner wall of the base 1, and a certain gap is left between the two extension parts 2. Two linear guide rails 3 are fixed on the front sides of the two extension parts 2, and the linear guide rails 3 are fixed on the front sides of the two extension parts 2 by screws. Two linear motors 4 in opposite directions are fixed on the rear sides of the two extension parts 2, and the sliding seat 5 is L-shaped. The top and bottom of the sliding seat 5 are respectively fixed on the upper and lower sliders of the two linear slides, and the raised portion on the sliding seat 5 is located in the gap between the two extension parts 2 and moves up and down between the two extension parts 2. The fixing groove on the raised portion is fixed with a lens group 14, and the output end of the linear motor 4 is connected to the sliding seat 5, and drives the sliding seat 5 to move on the linear slide to complete the magnification of the entire lens. The linear motor 4 and the linear slide are fixed on the front and back sides of the two extension parts 2, respectively, which can improve the compactness of the entire lens.

[0041] In one embodiment, conventional zoom lenses are arranged in a lens barrel and use gear transmission to adjust the linear movement of the lens to achieve zooming. Since the lens moves in the lens barrel, the friction is relatively large, which may cause the lens group 14 to tilt and cause poor imaging. Adjusting the lens through gear transmission is prone to low precision. The present application uses a linear motor 4 in conjunction with a linear slide to move the lens group 14. Compared with conventional zoom lenses, the linear motor 4 can better control the movement of the lens for zooming with higher precision. Secondly, by using a linear slide to replace the lens barrel, there will be no tilting due to friction, and the entire optical lens can achieve an almost unlimited lifespan.

[0042] Furthermore, it also includes a motor fixing seat, and the two linear motors 4 are respectively fixed to the two sides of the inner wall of the base 1 through the two motor fixing seats.

[0043] In this embodiment:

[0044] The motor fixing seat is used to fix the linear motor 4;

[0045] In a specific implementation, one motor fixing seat is fixed to the lower left side of the base 1 by screws, and the other motor fixing seat is fixed to the upper right side of the base 1 by screws, and two linear motors 4 are fixed to the two motor fixing seats by screws, respectively, and the output ends of the two linear motors 4 face opposite directions respectively.

[0046] Furthermore, it also includes a connecting piece, which is arranged on one side of the linear motor 4 on the base 1, and the output ends of the two linear motors 4 are fixedly connected to the sliding seat 5 through the two connecting pieces respectively.

[0047] In this embodiment:

[0048] The connecting piece is used to connect the motor output end and the sliding seat 5;

[0049] In a specific embodiment, the connecting member is arranged on the side of the protrusion close to the linear motor 4, one side of the connecting member is fixedly connected to the protrusion by a screw, and the other side is fixedly connected to the output end of the linear motor 4 by a screw. The connecting member connects the motor output end and the sliding seat 5 to facilitate the adjustment of the position of the lens group 14.

[0050] Furthermore, it also includes a fixed mirror group 6 , and two fixed mirror groups 6 are respectively arranged on the top of the base 1 and the top of the base 1 and are fixedly connected to the base 1 .

[0051] In a specific implementation, the top of the base 1 has a mounting groove for placing the fixed lens group 6, and the bottom of the base 1 has a connecting portion connected to the fixed lens group 6. The connecting portion and the mounting groove are respectively connected to the fixed lens group 6. The fixed lens group 6 and the two lens groups 14 form a variable magnification lens.

[0052] Furthermore, it also includes a grating reading head 7. Two grating reading heads 7 are arranged on one side of the two linear guide rails 3. The grating reading heads 7 are fixedly connected to the base 1.

[0053] In this embodiment:

[0054] The grating reading head 7 is used to sense the position change of the grating ruler to improve the positioning accuracy of the lens group 14;

[0055] In a specific embodiment, the grating reading head 7 is used to cooperate with the grating ruler to further improve the positioning accuracy. When the grating reading head 7 is not provided, the positioning accuracy of the lens group 14 needs to rely on the control accuracy of the motor itself.

[0056] Furthermore, it also includes a limit switch 8 , and four limit switches 8 are provided, and the four limit switches 8 are respectively arranged at the top and the bottom of the two sliding seats 5 .

[0057] In this embodiment:

[0058] The limit switch 8 is used to limit the movement range of the lens group 14;

[0059] In a specific implementation, the sliding seat 5 moves, and when it contacts the limit switch 8, the limit switch 8 transmits a signal to the linear motor 4, and the linear motor 4 stops operating. The four limit switches 8 are respectively arranged on the upper and lower sides of the two sliding seats 5, and limit the movement range of the sliding seats 5. Limiting the movement of the lens group by the limit switch 8 is more accurate in confirming the total stroke. Compared with the traditional zoom lens that uses the impact barrel method, it will not be damaged due to long-term use.

[0060] Furthermore, it also includes a fixed plate 9, which has four installation grooves on the side away from the linear motor 4. The limit switch 8 is arranged on the installation groove of the fixed plate 9 and is fixedly connected to the base 1 through the fixed plate 9. The grating reading head 7 is arranged on the side of the fixed plate 9 close to the linear motor 4 and is fixedly connected to the base 1 through the fixed plate 9.

[0061] In this embodiment:

[0062] The fixing plate 9 is used to fix the grating reading head 7 and the limit switch 8;

[0063] In a specific embodiment, the fixing plate 9 is arranged on the front side of the sliding seat 5, the grating reading head 7 is fixed to the rear side of the fixing plate 9 by screws, and four mounting grooves are arranged on the front side of the fixing plate 9 from top to bottom. Four limit switches 8 are fixed in the four mounting grooves by screws. Fixing the limit switches 8 and the grating reading head 7 by the fixing plate 9 makes replacement and installation more convenient.

[0064] Furthermore, it also includes a control circuit board 10, which is located outside the fixing plate 9, and is fixedly connected to the base 1. The base 1 is also provided with a wire hole, and the control wire is connected to the control circuit board 10 through the wire hole;

[0065] The wire bonding plate 11 is located on the outer side of the base 1 close to the linear motor 4 , and the wire bonding plate 11 is fixedly connected to the base 1 .

[0066] In this embodiment:

[0067] The control circuit board 10 is used to control the movement of the linear motor 4;

[0068] In a specific embodiment, the welding wire board 11 and the control circuit board 10 are respectively fixed to the front and rear sides of the base 1 by screws. The control circuit board 10 is used to control the movement of the linear motor 4. By integrating the control circuit into the control circuit board 10, the entire lens only needs one control line to connect to the host computer, without the need for external boards and extra connecting wires, which is more convenient to use.

[0069] Furthermore, it also includes a front cover plate 12 and a rear cover plate 13 , which are respectively fixed to two sides of the base 1 and close the base 1 .

[0070] In this embodiment:

[0071] The front cover plate 12 and the rear cover plate 13 are used to form a closed space with the base 1;

[0072] In a specific embodiment, the front cover plate 12 and the rear cover plate 13 are respectively fixed to the front side and the rear side of the base 1 by screws, and other components are enclosed inside the base 1 .

[0073] Of course, the present utility model may have many other implementations. Based on the present implementation, other implementations obtained by ordinary technicians in this field without any creative work are all within the scope of protection of the present utility model.

Claims

1. A dual-motor electric zoom lens, characterized in that: It includes a base, a lens group and a linear guide rail, wherein: The inner wall of the base is provided with two extensions toward the center; The linear guide rails are provided with two and are respectively provided on one side of the two extension parts of the base, the two linear guide rails are fixedly connected to the base, the linear guide rails include two sliders, a sliding seat is fixed on the two sliders of the linear guide rails, a grating ruler is provided on the sliding seat, the two sliding seats are respectively fixed on the sliders of the two linear guide rails, a convex portion is provided on the sliding seat, a fixing groove is provided on the convex portion and two lens groups are respectively fixed, and the convex portion of the sliding seat is located between the two extension parts; Two linear motors are respectively provided on the other side of the two extension parts of the base. The two linear motors are fixed on the base. The output ends of the two linear motors are respectively fixedly connected to the two sides of the sliding seats. The lens group is adjusted and moved on the linear guide rails in the base by the linear motors.

2. The dual-motor electric zoom lens according to claim 1, characterized in that: It also includes a motor fixing seat, and the two linear motors are respectively fixed to the two sides of the inner wall of the base through the two motor fixing seats.

3. The dual-motor electric zoom lens according to claim 1, characterized in that: It also includes a connecting piece, which is arranged on one side of the linear motor on the base, and the two output ends of the linear motor are fixedly connected to the sliding seat through the two connecting pieces respectively.

4. The dual-motor electric zoom lens according to claim 1, characterized in that: It also includes a fixed mirror group, wherein two fixed mirror groups are respectively arranged on the top of the base and the top of the base and are fixedly connected to the base.

5. The dual-motor electric zoom lens according to claim 1, characterized in that: It also includes a grating reading head, two of which are arranged on one side of the two linear guide rails, and the grating reading heads are fixedly connected to the base.

6. The dual-motor electric zoom lens according to claim 5, characterized in that: It also includes limit switches, and four limit switches are provided. The four limit switches are respectively arranged one at the top and one at the bottom of the two sliding seats.

7. The dual-motor electric zoom lens according to claim 6, characterized in that: It also includes a fixing plate, which has four mounting grooves on a side away from the linear motor, the limit switch is arranged on the mounting groove of the fixing plate and is fixedly connected to the base through the fixing plate, and the grating reading head is arranged on a side of the fixing plate close to the linear motor and is fixedly connected to the base through the fixing plate.

8. The dual-motor electric zoom lens according to claim 7, characterized in that: It also includes a control circuit board, which is located outside the fixing plate and fixedly connected to the base. The base is also provided with a wire hole, and the control wire is connected to the control circuit board through the wire hole.

9. The dual-motor electric zoom lens according to claim 1, characterized in that: It also includes a wire bonding plate, which is located on the base close to the outer side of the linear motor and is fixedly connected to the base.

10. The dual-motor electric zoom lens according to claim 1, characterized in that: It also includes a front cover plate and a rear cover plate, wherein the front cover plate and the rear cover plate are respectively fixed to two sides of the base and close the base.

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