A lens assembly

Abstract

The utility model relates to a kind of lens assemblies, it includes: zoom assembly, zoom lens group is arranged inside it;Base, it is set in the tail end of the zoom assembly;Zoom drive assembly, it is connected the zoom assembly, for driving the linear movement of the zoom lens group;Focusing assembly, focusing lens group is arranged inside it, and the focusing assembly is set in the side of the base away from zoom assembly;And, focusing drive assembly, it is set in the side of the base away from zoom assembly, for driving focusing lens group linear motion.This application sets angle measurement component, focusing assembly in the space of the side of base away from zoom assembly, so that focusing assembly, zoom assembly do not occur positional interference, can be independently realized lens focusing and zooming, while reducing the radial dimension of lens assembly whole.

Description

Technical Field

[0001] This utility model relates to the field of imaging equipment technology, and in particular to a lens assembly. Background Technology

[0002] Currently, most imaging devices with high-precision optical axis consistency use a structure of guide tube and cam tube to drive the linear movement of the lens group in order to complete lens focusing.

[0003] In this process, it is necessary to obtain the rotation angle of the cam cylinder in order to control the focusing accuracy based on the rotation angle. The commonly used structure is to set a rotation angle detection component on the radial side of the cam cylinder. For example, in the patent application with application number 2013100552233 and patent name "Infrared Lens Grating Preset Position Focusing Mechanism", a grating plate is set on the outer peripheral surface of the guide groove cylinder, and the rotation angle and direction of the guide groove cylinder are obtained through the grating plate and the optocoupler.

[0004] The aforementioned structural design leads to an increase in the radial dimension of the lens barrel, which in turn increases the overall size and weight of the imaging device. This is especially true for handheld imaging devices, where the increased size and weight will result in a poor customer experience. Utility Model Content

[0005] The purpose of this utility model is to provide a lens assembly in which an angle measuring component and a focusing component are arranged in the space on the side of the base away from the zoom component, so that the focusing component and the zoom component will not interfere with each other in position, and can independently realize lens focusing and zooming, while reducing the overall radial dimension of the lens assembly.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A lens assembly is provided, comprising:

[0008] The zoom module contains a zoom lens assembly.

[0009] A base is disposed at the rear end of the zoom component;

[0010] A zoom drive assembly, connected to the zoom assembly, is used to drive the zoom lens group to move linearly;

[0011] A focusing assembly, which has a focusing lens group inside, and the focusing assembly is located on the side of the base away from the zoom assembly;

[0012] And a focusing drive assembly, which is located on the side of the base away from the zoom assembly, for driving the focusing lens group to move linearly.

[0013] Preferably, the zoom component includes:

[0014] The zoom guide tube has a zoom lens assembly inside and an axially extending zoom guide tube guide hole on its outer wall.

[0015] A zoom guide screw, which connects to the zoom lens assembly, with its free end passing through the guide hole of the zoom guide cylinder;

[0016] In addition, a variable magnification cam cylinder is sleeved around the variable magnification guide cylinder, and its outer wall surface is provided with a variable magnification arc-shaped guide groove that communicates with the guide hole of the variable magnification guide cylinder and cooperates with the free end of the variable magnification guide screw.

[0017] Preferably, the zoom drive component includes:

[0018] A variable magnification drive motor is connected to a variable magnification guide cylinder, and the rotation output shaft of the variable magnification drive motor is connected to a variable magnification drive motor gear.

[0019] In addition, a variable magnification cam cylinder rack is connected to the outer wall of the variable magnification cam cylinder and meshes with the gear of the variable magnification drive motor.

[0020] Preferably, the central axis of the rotation output shaft of the variable magnification drive motor is parallel to the central axis of the variable magnification cam cylinder.

[0021] Preferably, the lens assembly further includes:

[0022] An encoder connected to a zoom guide cylinder and having an encoder gear that meshes with the zoom cam cylinder rack.

[0023] Preferably, the focusing component includes:

[0024] The focusing guide tube has a focusing lens assembly inside and a focusing guide tube guide hole extending axially on its outer wall surface.

[0025] A focusing guide screw, which is connected to the focusing lens assembly, and whose free end passes through the guide hole of the focusing guide tube;

[0026] In addition, a focusing cam cylinder is sleeved around the focusing guide cylinder, and its outer wall surface is provided with a focusing arc-shaped guide groove that communicates with the guide hole of the focusing guide cylinder and cooperates with the free end of the focusing guide screw.

[0027] Preferably, the focusing guide cylinder and the focusing cam cylinder are both connected to the side of the base away from the zoom component.

[0028] Preferably, the focusing drive component includes:

[0029] A focusing drive motor is connected to a base, and the rotating output shaft of the focusing drive motor is connected to a focusing drive motor gear.

[0030] In addition, a focusing driven gear is connected to the outer wall surface of the focusing cam cylinder and meshes with the focusing drive motor gear.

[0031] Preferably, the lens assembly further includes an angle measuring component, which is disposed on the side of the base away from the zoom component, for obtaining the rotation angle of the focusing component when the lens is focused.

[0032] Preferably, the angle measuring component includes:

[0033] The sensor is connected to the surface of the base on the side away from the zoom component;

[0034] And a grating ruler, which is connected to the outer wall surface of the focusing guide cylinder and rotates synchronously with the focusing guide cylinder.

[0035] In summary, this utility model has the following advantages compared with the prior art:

[0036] This utility model has a compact structure. It makes full use of the space on the side of the base away from the zoom component, and sets the angle measuring component and the focusing component on this side. This ensures that the focusing component and the zoom component will not interfere with each other in position, and can independently realize lens focusing and zooming, while reducing the overall radial dimension of the lens component.

[0037] Meanwhile, this utility model can also obtain the rotation angle of the focusing component and the zoom component in real time through the angle measuring component and the encoder, so as to achieve precise focusing and zoom operation. When obtaining the rotation angle of the zoom component, the encoder gear and rack on the encoder directly mesh and transmit power, without the need to set up a gearbox and motor to cooperate, which helps to further reduce the structural volume and weight and improve the user experience. Attached Figure Description

[0038] Figure 1 This is an overall structural diagram of the lens assembly in this utility model from a first-view perspective;

[0039] Figure 2 This is an overall structural diagram of the lens assembly in this utility model from a second perspective;

[0040] Figure 3 This is an overall structural diagram of the variable magnification guide cylinder in this utility model;

[0041] Figure 4 This is a cross-sectional view of the lens assembly in this utility model. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0043] Example 1

[0044] like Figure 1-4 As shown, this embodiment provides a lens assembly, which includes:

[0045] A zoom assembly, which has a zoom lens group 1 inside, and the head end of the zoom assembly is used to mount a lens 100.

[0046] Base 2, which is disposed at the tail end of the zoom component;

[0047] A zoom drive assembly, connected to the zoom assembly, is used to drive the zoom lens group 1 to move linearly to achieve lens zoom.

[0048] The focusing assembly has a focusing lens group 3 inside, and the focusing assembly is located on the side of the base 2 away from the zoom assembly;

[0049] A focusing drive assembly is located on the side of the base 2 away from the zoom assembly and is used to drive the focusing lens group 3 to move linearly in order to achieve lens focusing.

[0050] In addition, an angle measuring component is disposed on the side of the base 2 away from the zoom component, for obtaining the rotation angle of the focusing component when the lens is focused.

[0051] Furthermore, the zoom component includes:

[0052] The zoom guide tube 4 has a zoom lens assembly 1 inside and a zoom guide tube guide hole 41 extending axially on its outer wall surface; the head end of the zoom guide tube 4 is used to install the lens 100.

[0053] The zoom guide screw 42 is connected to the zoom lens assembly 1, and its free end passes through the guide hole 41 of the zoom guide cylinder;

[0054] The variable magnification cam cylinder 5 is sleeved around the variable magnification guide cylinder 4, and its outer wall surface is provided with a variable magnification arc-shaped guide groove 51 that communicates with the guide hole 41 of the variable magnification guide cylinder. The variable magnification arc-shaped guide groove 51 is engaged with the free end of the variable magnification guide screw 42. The engagement means that the free end of the variable magnification guide screw 42 is located in or passes through the variable magnification arc-shaped guide groove 51.

[0055] The base 2 is located at the tail end of the variable magnification cam cylinder 5, and the variable magnification guide cylinder 4, the variable magnification cam cylinder 5, and the base 3 are coaxially arranged.

[0056] The zoom drive assembly is used to drive the zoom cam cylinder 5 to rotate. When the zoom cam cylinder 5 rotates, the zoom guide screw 42 slides along the zoom arc guide groove 51 to drive the zoom guide cylinder 4 and the zoom lens group 1 inside it to move linearly along the zoom guide cylinder guide hole 41 to achieve lens zoom.

[0057] Furthermore, the zoom drive component includes:

[0058] The variable magnification drive motor 6 is detachably connected to the variable magnification guide cylinder 4 via screws, bolts, or other structures, and the rotation output shaft of the variable magnification drive motor 6 is connected to the variable magnification drive motor gear 61; wherein, the central axis of the rotation output shaft of the variable magnification drive motor 6 is parallel to the central axis of the variable magnification cam cylinder 5.

[0059] The variable magnification cam cylinder rack 7 is connected to the outer wall of the variable magnification cam cylinder 5 and meshes with the variable magnification drive motor gear 61;

[0060] When the variable magnification drive motor 6 is working, it can drive the variable magnification drive motor gear 61 to rotate, and further drive the variable magnification cam cylinder 5 to rotate through the meshing transmission between the variable magnification drive motor gear 61 and the variable magnification cam cylinder rack 7.

[0061] The focusing component includes:

[0062] The focusing guide tube 8 has a focusing lens group 3 inside and a focusing guide tube guide hole 81 extending axially on its outer wall surface.

[0063] The focusing guide screw 82 is connected to the focusing lens group 3, and its free end passes through the guide hole 81 of the focusing guide tube.

[0064] The focusing cam cylinder 9 is sleeved around the focusing guide cylinder 8, and its outer wall surface is provided with a focusing arc-shaped guide groove 91 that communicates with the guide hole 81 of the focusing guide cylinder, and it cooperates with the free end of the focusing guide screw 82. The cooperation means that the free end of the focusing guide screw 82 is located in the focusing arc-shaped guide groove 91 or passes through the focusing arc-shaped guide groove 91.

[0065] Meanwhile, the focusing guide cylinder 8 and the focusing cam cylinder 9 are both connected to the side of the base 2 away from the zoom component, and the zoom guide cylinder 4, the zoom cam cylinder 5, the base 3, the focusing guide cylinder 8, and the focusing cam cylinder 9 are coaxially arranged.

[0066] Furthermore, the focusing drive assembly is used to drive the focusing cam cylinder 9 to rotate, and when the focusing cam cylinder 9 rotates, the focusing guide screw 82 slides along the focusing arc guide groove 91 to drive the focusing guide cylinder 8 and the focusing lens group 3 inside it to move linearly along the focusing guide cylinder guide hole 81 to achieve lens focusing.

[0067] Furthermore, the focusing drive component includes:

[0068] The focusing drive motor 10 is detachably connected to the base 2 via screws, bolts, or other structures, and the rotating output shaft of the focusing drive motor 10 is connected to the focusing drive motor gear 101; wherein, the central axis of the rotating output shaft of the focusing drive motor 10 is parallel to the central axis of the focusing cam cylinder 9.

[0069] The focusing driven gear 11 is detachably connected to the outer wall of the focusing cam cylinder 9 by means of screws, bolts or other structures, and meshes with the focusing drive motor gear 101; in this embodiment, the focusing driven gear 11 can be a sector gear.

[0070] When the focusing drive motor 10 is working, it can drive the focusing drive motor gear 101 to rotate, and further drive the focusing cam cylinder 9 to rotate through the meshing transmission between the focusing drive motor gear 101 and the focusing driven gear 11.

[0071] Therefore, in this embodiment, the angle measuring component is set on one side of the base 2, eliminating the need to set the angle measuring component in the radial direction of the base 2. This helps to reduce the radial dimension of the base 2, further reducing the overall size and weight of the device and improving the customer experience.

[0072] Example 2:

[0073] The only difference between this embodiment and Embodiment 1 is that the angle measuring component includes:

[0074] Sensor 12 is connected to the surface of the base 2 away from the zoom component by means of fixed connection such as adhesive or detachable connection;

[0075] The grating ruler 13 is connected to the outer wall of the focusing guide cylinder 8 and rotates synchronously with the focusing guide cylinder 8.

[0076] The rotation angle of the focusing guide cylinder 8 is obtained based on the mutual sensing of the sensor 12 and the grating ruler 13.

[0077] Example 3:

[0078] The only difference between this embodiment and embodiment 1 or 2 is that, Figure 1-2 As shown, the lens assembly also includes:

[0079] The encoder 14 is connected to the zoom guide cylinder 4 and has an encoder gear 141 that meshes with the zoom cam cylinder rack 7. When the zoom cam cylinder 5 is driven to rotate by the meshing transmission between the zoom drive motor gear 61 and the zoom cam cylinder rack 7, the encoder gear 141 meshing with the zoom cam cylinder rack 7 rotates synchronously, so that the encoder 14 and the zoom cam cylinder 5 rotate synchronously. The rotation angle of the zoom cam cylinder 5 is obtained through the encoder 14. The user can perform zoom operation based on the rotation angle of the zoom cam cylinder 5 to achieve precise control of the zoom operation.

[0080] The encoder 14 can be one or more of the following: absolute encoder, incremental encoder, magnetic encoder, and photoelectric encoder.

[0081] Therefore, this embodiment uses the direct meshing of the encoder gear and rack on the encoder to drive the transmission, eliminating the need for a gearbox and motor, thus significantly reducing the structural volume and weight and improving the user experience.

[0082] In summary, the lens assembly in this application has a compact structure. It makes full use of the space on the side of the base away from the zoom component, and sets the angle measuring component and the focusing component on this side. This ensures that the focusing component and the zoom component will not interfere with each other in position, and can independently realize lens focusing and zooming. At the same time, it reduces the overall radial dimension of the lens assembly, further reducing the overall size and weight of the device.

[0083] Meanwhile, the rotation angles of the focusing and zooming components can be obtained in real time through the angle measurement component and the encoder to achieve precise focusing and zooming operations. When obtaining the rotation angle of the zooming component, the encoder gear and rack on the encoder directly mesh and drive, eliminating the need for a gearbox and motor. This helps to further reduce the size and weight of the structure and improve the user experience.

[0084] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lens assembly, characterized in that, include: The zoom module contains a zoom lens assembly. A base is disposed at the rear end of the zoom component; A zoom drive assembly, connected to the zoom assembly, is used to drive the zoom lens group to move linearly; A focusing assembly, which has a focusing lens group inside, and the focusing assembly is located on the side of the base away from the zoom assembly; And a focusing drive assembly, which is located on the side of the base away from the zoom assembly, for driving the focusing lens group to move linearly.

2. The lens assembly as claimed in claim 1, characterized in that, The zoom component includes: The zoom guide tube has a zoom lens assembly inside and an axially extending zoom guide tube guide hole on its outer wall. A zoom guide screw, which connects to the zoom lens assembly, with its free end passing through the guide hole of the zoom guide cylinder; In addition, a variable magnification cam cylinder is sleeved around the variable magnification guide cylinder, and its outer wall surface is provided with a variable magnification arc-shaped guide groove that communicates with the guide hole of the variable magnification guide cylinder and cooperates with the free end of the variable magnification guide screw.

3. The lens assembly as described in claim 2, characterized in that, The zoom drive component includes: A variable magnification drive motor is connected to a variable magnification guide cylinder, and the rotation output shaft of the variable magnification drive motor is connected to a variable magnification drive motor gear. In addition, a variable magnification cam cylinder rack is connected to the outer wall of the variable magnification cam cylinder and meshes with the gear of the variable magnification drive motor.

4. The lens assembly as described in claim 3, characterized in that, The central axis of the rotation output shaft of the variable magnification drive motor is parallel to the central axis of the variable magnification cam cylinder.

5. The lens assembly as described in claim 3, characterized in that, The lens assembly also includes: An encoder connected to a zoom guide cylinder and having an encoder gear that meshes with the zoom cam cylinder rack.

6. The lens assembly as claimed in claim 1, characterized in that, The focusing component includes: The focusing guide tube has a focusing lens assembly inside and a focusing guide tube guide hole extending axially on its outer wall surface. A focusing guide screw, which is connected to the focusing lens assembly, and whose free end passes through the guide hole of the focusing guide tube; In addition, a focusing cam cylinder is sleeved around the focusing guide cylinder, and its outer wall surface is provided with a focusing arc-shaped guide groove that communicates with the guide hole of the focusing guide cylinder and cooperates with the free end of the focusing guide screw.

7. The lens assembly as claimed in claim 6, characterized in that, The focusing guide cylinder and the focusing cam cylinder are both connected to the side of the base away from the zoom component.

8. The lens assembly as claimed in claim 6, characterized in that, The focusing drive component includes: A focusing drive motor is connected to a base, and the rotating output shaft of the focusing drive motor is connected to a focusing drive motor gear. In addition, a focusing driven gear is connected to the outer wall surface of the focusing cam cylinder and meshes with the focusing drive motor gear.

9. The lens assembly as claimed in claim 6, characterized in that, The lens assembly further includes an angle measuring component, which is disposed on the side of the base away from the zoom component, for obtaining the rotation angle of the focusing component when the lens is focused.

10. The lens assembly as claimed in claim 9, characterized in that, The angle measurement component includes: The sensor is connected to the surface of the base on the side away from the zoom component; And a grating ruler, which is connected to the outer wall surface of the focusing guide cylinder and rotates synchronously with the focusing guide cylinder.

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