Optical lens and endoscope

Abstract

The utility model provides an optical lens and an endoscope. The optical lens comprises a lens front group, a focusing group and a lens rear group, wherein the focusing group is defined with a central shaft, and the front lens group, the focusing group and the rear lens group are sequentially connected based on the central shaft; the focusing group comprises a focusing shell, a lens arranged in the focusing shell and an electric driving piece connected with the focusing shell and the lens, the focusing shell is connected with the front lens group and the rear lens group, the lens is located on the central shaft, and the electric driving piece is used for driving the lens to move in the direction of the central shaft. By the adoption of the technical scheme, the optical lens can drive the zoom lens to move in an electric mode so as to achieve the functions of optical zoom multiple adjustment, bifocus adjustment and focusing, a doctor does not need to conduct adjustment in a manual mode, the difficulty of using an endoscope by the doctor is lowered, and the operation convenience degree of the doctor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, and more specifically to an optical lens and an endoscope. Background Art

[0002] Existing medical endoscopes achieve optical magnification functions through manual drive, such as pulling a steel wire to drive the lens to move to adjust the optical magnification, dual focus and focusing functions; due to manual operation, the doctor's control and observation during the operation are not the best experience, and the doctor's control skills are high, which directly affects the number of doctors performing related operations. Utility Model Content

[0003] The utility model aims to provide an optical lens and an endoscope to solve the technical problem in the prior art that the endoscope focus adjustment and magnification control requirements are high.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] In a first aspect, an optical lens is provided, comprising:

[0006] A front lens group, a focusing group and a rear lens group; wherein the focusing group is defined with a central axis, and the front lens group, the focusing group and the rear lens group are sequentially connected based on the central axis; the focusing group comprises a focusing housing, a lens arranged in the focusing housing, and an electric driving component connecting the focusing housing and the lens, the focusing housing connects the front lens group and the rear lens group, the lens is located on the central axis, and the electric driving component is used to drive the lens to move along the direction of the central axis.

[0007] By adopting the above technical solution, the optical lens of this embodiment can electrically drive the zoom lens to move, thereby realizing automatic adjustment of the optical zoom ratio and focusing function, without the need for the doctor to adjust manually, thereby reducing the difficulty for the doctor to use the endoscope and improving the convenience of the doctor's operation.

[0008] In one embodiment, the electric drive component includes a stationary structure and a movable structure, the stationary structure is arranged on the focusing housing, and the movable structure is arranged on the lens, and a magnetic field is formed between the stationary structure and the movable structure to drive the movable structure to move along the direction of the central axis, so that the lens moves along the direction of the central axis.

[0009] By adopting the above technical solution, the movable structure can be moved relative to the static structure through the magnetic field, thereby improving the movement accuracy of the lens.

[0010] In one embodiment, one of the stationary structure and the movable structure is a coil structure, and the other of the stationary structure and the movable structure is a magnetic structure.

[0011] By adopting the above technical solution, precise control of the lens is achieved and precise focusing is achieved.

[0012] In one embodiment, a guide groove is provided between the stationary structure and the focusing housing, and the groove length direction of the guide groove is parallel to the central axis. The focusing group also includes a focusing frame for fixing the lens, and the movable structure is provided on the focusing frame. The focusing frame is provided with a guide block slidably arranged in the guide groove, and the guide block can move along the groove length direction of the guide groove.

[0013] By adopting the above technical solution, the groove wall of the guide groove can guide the guide block to move in a directional manner, thereby enabling the lens to move along the groove length direction of the guide groove, thereby improving the stability of the lens movement.

[0014] In one embodiment, a fixing groove is provided on the outer peripheral surface of the focusing frame, and the movable structure is fixed in the fixing groove.

[0015] By adopting the above technical solution, the degree of coordination between the movable structure and the static structure is improved.

[0016] In one embodiment, the electric drive component includes a stationary structure and a movable structure, the stationary structure is arranged on the focusing housing, and the movable structure is arranged on the lens. The stationary structure includes a magnet and a metal elastomer arranged on the magnet, the magnet is arranged on the focusing housing, and the movable structure includes a moving body, and the moving body is arranged on the lens. When a high-frequency AC voltage is applied to the magnet, the inverse piezoelectric effect or the electrostrictive effect is used to make the metal elastomer generate microscopic mechanical vibrations, thereby causing the moving body to move along the central axis.

[0017] By adopting the above technical solution, the electric drive component has the advantages of large torque, small size, high efficiency and long life.

[0018] In one embodiment, the front lens group includes a front group housing and a front group lens, the front group housing is connected to the focusing housing, and the front group lens is arranged in the front group housing and located on the central axis.

[0019] By adopting the above technical solution, the front lens group is arranged close to the object side.

[0020] In one embodiment, the rear lens group includes a rear group housing and a rear group lens, the rear group housing is connected to the focusing housing, and the rear group lens is arranged in the rear group housing and located on the central axis.

[0021] By adopting the above technical solution, the rear-group imaging setting of the lens is realized.

[0022] In one embodiment, the optical lens further includes an image sensor, which is disposed at an end of the rear lens group away from the focusing group, and the image sensor is located on the central axis.

[0023] By adopting the above technical solution, the light signal of the optical lens is converted into an electrical signal.

[0024] In a second aspect, an endoscope is provided, comprising an endoscope body and the above-mentioned optical lens, wherein the optical lens is arranged on the endoscope body.

[0025] By adopting the above technical solution, on the basis of having the advantages of the optical lens of the above embodiment, the endoscope of this embodiment also has the advantage of easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a three-dimensional structural diagram of an optical lens provided by an embodiment of the utility model.

[0028] Figure 2 It is an exploded view of the optical lens provided by the embodiment of the utility model.

[0029] Figure 3 It is a cross-sectional view of an optical lens provided by an embodiment of the utility model, wherein the optical lens can realize a focusing function.

[0030] Figure 4 It is a cross-sectional view of an optical lens provided by an embodiment of the utility model, wherein the optical lens can realize a dual-focus function, and the lens is located at a first extreme position.

[0031] Figure 5 It is a cross-sectional view of an optical lens provided by an embodiment of the utility model, wherein the optical lens can realize a dual-focus function, and the lens is located at a second extreme position.

[0032] Figure 6 It is an exploded diagram of the focusing group provided by the embodiment of the utility model.

[0033] The reference numerals in the figures are:

[0034] 100. Optical lens;

[0035] 1. Front group of lens; 2. Focusing group; 3. Rear group of lens; X, center axis; 4. Image sensor;

[0036] 11. front housing; 12. front lens group; 31. rear housing; 32. rear lens group; 21. focusing housing; 22. lens; 23. electric drive unit; 24. focusing frame;

[0037] 231, static structure; 232, movable structure; 242, fixed groove; 211, guide groove; 241, guide block;

[0038] 2311.Stationary unit. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly located on the other element or indirectly located on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0041] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention, and do not indicate that a device or element must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating relative importance or indicating the number of technical features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The following is a more detailed description of the specific implementation of the present utility model in conjunction with specific embodiments:

[0043] like Figures 1 to 3As shown, an optical lens 100 provided in an embodiment of the utility model is applied to an endoscope; the optical lens 100 of this embodiment can electrically drive the zoom lens to move so as to adjust the optical zoom multiple (optical magnification), dual focus (so that the endoscope can observe close and long distances at the same time) and focus (such as focusing) functions, without the need for the doctor to adjust manually, thereby improving the convenience of the doctor's operation; the following is an explanation through specific implementation methods:

[0044] The optical lens 100 of this embodiment includes: a front lens group 1, a focusing group 2 and a rear lens group 3; wherein the focusing group 2 defines a central axis X, and the front lens group 1, the focusing group 2 and the rear lens group 3 are connected in sequence based on the central axis X; the focusing group 2 includes a focusing housing 21, a lens 22 arranged in the focusing housing 21 and an electric driving component 23 connecting the focusing housing 21 and the lens 22, the focusing housing 21 connects the front lens group 1 and the rear lens group 3, the lens 22 is located on the central axis X, and the electric driving component 23 is used to drive the lens 22 to move along the direction of the central axis X.

[0045] Here, it can be understood that the front lens group 1 refers to a component for fixing the front lens group; the front lens group 1 is used to be arranged on the object side of the focusing group 2, and the light reflected by the object can enter the interior of the optical lens 100 from the front lens group 1;

[0046] The focus group 2 refers to a component for fixing the lens 22; the focus group 2 is arranged between the front lens group 1 and the rear lens group 3, and the focus group 2 is used to adjust the optical magnification of the optical lens 100 and adjust the focal length;

[0047] The rear lens group 3 refers to a component for fixing the rear lens group; the rear lens group 3 is used to be arranged on the image side of the focusing group 2, and the light reflected by the object passes through the rear lens group 3, the zoom group and the rear lens group 3 in sequence, and finally forms an image at the rear lens group 3;

[0048] The focus group 2 includes a focus housing 21, a lens 22 and an electric drive 23; the focus housing 21 refers to a housing for fixing the lens 22, and the focus housing 21 plays the role of fixing and protecting the lens 22. The focus housing 21 connects the front lens group 1 and the rear lens group 3; the lens 22 refers to a lens for adjusting the focal length, and the lens 22 is located on the central axis X; the electric drive 23 refers to a component for driving the lens 22 to move, and the electric drive 23 connects the focus housing 21 and the lens 22. The electric drive 23 can drive the lens 22 to move along the direction of the central axis X, thereby adjusting the optical magnification and focal length of the optical lens 100. The electric drive 23 can receive control information to make corresponding control actions, thereby implementing the automatic adjustment of the optical magnification and focal length of the optical lens 100, thereby improving the automation of the optical lens 100; in addition, the lens 22 is defined with two extreme positions on the central axis X, and the electric drive 23 can implement the continuous variable magnification function of the lens 22, and at the same time, the dual focus function (such as Figure 4 and Figure 5 As shown); it needs to be further explained that the control information can be generated by a control instruction issued by a doctor through a control terminal, or the control information can be obtained by analyzing an image obtained by an endoscope.

[0049] By adopting the above technical solution, the optical lens 100 of this embodiment can electrically drive the zoom lens to move and thereby realize automatic adjustment of the optical zoom ratio and focusing function, without the need for the doctor to adjust manually, thereby reducing the difficulty for the doctor to use the endoscope and improving the convenience of the doctor's operation.

[0050] Please also read Figure 6 In one embodiment, the electric drive component 23 includes a stationary structure 231 and a movable structure 232. The stationary structure 231 is arranged on the focusing housing 21, and the movable structure 232 is arranged on the lens 22. A magnetic field is formed between the stationary structure 231 and the movable structure 232 to drive the movable structure 232 to move along the direction of the central axis X, so that the lens 22 moves along the direction of the central axis X.

[0051] Here, it can be understood that the static structure 231 refers to a structure that is static relative to the focusing housing 21, and the static structure 231 is arranged on the focusing housing 21. Optionally, the static structure 231 is arranged on the inner wall of the focusing housing 21; the movable structure 232 refers to a structure that is movable relative to the focusing housing 21, and the movable structure 232 is arranged on the lens 22; a magnetic field is formed between the static structure 231 and the movable structure 232, and the movable structure 232 can be affected by the magnetic force in the magnetic field and move along the direction of the central axis X, thereby driving the lens 22 to move along the direction of the central axis X.

[0052] By adopting the above technical solution, the movable structure 232 is moved relative to the static structure 231 through the magnetic field, thereby improving the movement accuracy of the lens 22.

[0053] In one embodiment, one of the stationary structure 231 and the movable structure 232 is a coil structure, and the other of the stationary structure 231 and the movable structure 232 is a magnetic structure.

[0054] Here, it can be understood that the coil structure can be arranged on the focusing housing 21, and the magnetic structure can be arranged on the lens 22; conversely, the coil structure can be arranged on the lens 22, and the magnetic structure is arranged on the focusing housing 21; in the present embodiment, the magnetic structure is arranged on the focusing housing 21, the magnetic structure refers to a structure with magnetism, generally refers to a magnet, the magnetic structure is used to form a magnetic field, and the coil structure is arranged on the lens 22, and the coil structure changes the magnitude and direction of its own current to generate magnetic fields of different directions and intensities, so that the coil structure and the magnetic structure exert magnetic force on each other, and the two can move relative to each other.

[0055] It needs to be further explained that the above-mentioned static structure 231 and movable structure 232 constitute a voice coil motor, which is a device that converts electrical energy into mechanical energy to achieve linear or angular motion. The force that achieves the motion comes from the force exerted on the energized coil in the magnetic field.

[0056] By adopting the above technical solution, accurate control of the lens 22 is achieved, and accurate focusing is achieved.

[0057] In one embodiment, a guide groove 211 is provided between the stationary structure 231 and the focusing housing 21, and the groove length direction of the guide groove 211 is parallel to the central axis X. The focusing group 2 also includes a focusing frame 24 for fixing the lens 22, and the movable structure 232 is provided on the focusing frame 24. The focusing frame 24 is provided with a guide block 241 slidably arranged in the guide groove 211, and the guide block 241 can move along the groove length direction of the guide groove 211.

[0058] Here, it can be understood that the guide groove 211 is used to guide the moving direction of the lens 22; the guide groove 211 is arranged between the stationary structure 231 and the focusing housing 21; optionally, the stationary structure 231 includes two stationary units 2311, the two stationary units 2311 are arranged opposite to each other, and the guide groove 211 is formed between two adjacent stationary units 2311; the focusing group 2 also includes a focusing frame 24 for fixing the lens 22, the movable structure 232 is arranged on the focusing frame 24, and the focusing frame 24 is provided with a guide block 241 slidably arranged in the guide groove 211, and the guide block 241 can move along the groove length direction of the guide groove 211.

[0059] By adopting the above technical solution, the groove wall of the guide groove 211 can guide the guide block 241 to move in a directional manner, thereby enabling the lens 22 to move along the groove length direction of the guide groove 211, thereby improving the stability of the movement of the lens 22.

[0060] In one embodiment, a fixing groove 242 is formed on the outer peripheral surface of the focusing frame 24 , and the movable structure 232 is fixed in the fixing groove 242 .

[0061] Here, it can be understood that the fixing groove 242 is set along the outer peripheral surface of the focusing frame 24, the fixing groove 242 is arranged along the circumference of the focusing frame 24, and the movable structure 232 is fixed in the fixing groove 242, the movable structure 232 adapts to the shape of the fixing groove 242, and the movable structure 232 is arranged circumferentially, so that each part of the movable structure 232 in the circumferential direction can be close to the static structure 231, which is conducive to cooperation with the static structure 231.

[0062] By adopting the above technical solution, the degree of coordination between the movable structure 232 and the static structure 231 is improved.

[0063] In one embodiment, the electric drive component 23 includes a stationary structure 231 and a movable structure 232. The stationary structure 231 is arranged on the focusing housing 21, and the movable structure 232 is arranged on the lens 22. The stationary structure 231 includes a magnet and a metal elastomer arranged on the magnet. The magnet is arranged on the focusing housing 21. The movable structure 232 includes a moving body, and the moving body is arranged on the lens 22. When a high-frequency AC voltage is applied to the magnet, the inverse piezoelectric effect or the electrostrictive effect is used to make the metal elastomer generate microscopic mechanical vibrations, thereby causing the moving body to move along the central axis X.

[0064] Here, it can be understood that the electric drive member 23 is an ultrasonic motor, which includes a vibrating body (equivalent to the stator in a conventional motor, including a magnet and a metal elastic body) and a moving body (equivalent to the rotor in a conventional motor, including a metal elastic body and friction materials and plastics). When a high-frequency AC voltage is applied to the magnet of the vibrating body, the inverse piezoelectric effect or electrostrictive effect is used to make the stator generate microscopic mechanical vibrations in the ultrasonic frequency band (frequency is above 20KHZ), and this vibration is converted into the rotation or linear motion of the rotor through resonance amplification and friction coupling.

[0065] By adopting the above technical solution, the electric drive member 23 has the advantages of large torque, small size, high efficiency and long life.

[0066] In one embodiment, the front lens group 1 includes a front housing 11 and a front lens group 12 . The front housing 11 is connected to the focusing housing 21 . The front lens group 12 is disposed in the front housing 11 and is located on the central axis X.

[0067] By adopting the above technical solution, the front lens group 1 is arranged close to the object side.

[0068] In one embodiment, the rear lens group 3 includes a rear group housing 31 and a rear group lens 32 . The rear group housing 31 is connected to the focusing housing 21 . The rear group lens 32 is disposed in the rear group housing 31 and is located on the central axis X.

[0069] By adopting the above technical solution, the imaging setting of the rear lens group 3 is realized.

[0070] In one embodiment, the optical lens 100 further includes an image sensor 4 , which is disposed at an end of the rear lens group 3 away from the focusing group 2 , and the image sensor 4 is located on the central axis X.

[0071] By adopting the above technical solution, the optical signal of the optical lens 100 is converted into an electrical signal.

[0072] In a second aspect, an endoscope is provided, comprising an endoscope body and the above-mentioned optical lens 100 , wherein the optical lens 100 is disposed on the endoscope body.

[0073] By adopting the above technical solution, on the basis of having the advantages of the optical lens 100 of the above embodiment, the endoscope of this embodiment also has the advantage of easy operation.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical lens, characterized in that: include: A front lens group, a focusing group and a rear lens group; wherein the focusing group is defined with a central axis, and the front lens group, the focusing group and the rear lens group are sequentially connected based on the central axis; the focusing group comprises a focusing housing, a lens arranged in the focusing housing, and an electric driving component connecting the focusing housing and the lens, the focusing housing connects the front lens group and the rear lens group, the lens is located on the central axis, and the electric driving component is used to drive the lens to move along the direction of the central axis.

2. The optical lens according to claim 1, wherein: The electric drive component includes a static structure and a movable structure, wherein the static structure is arranged on the focusing housing, and the movable structure is arranged on the lens, and a magnetic field is formed between the static structure and the movable structure to drive the movable structure to move along the direction of the central axis, thereby causing the lens to move along the direction of the central axis.

3. The optical lens according to claim 2, wherein: One of the stationary structure and the movable structure is a coil structure, and the other of the stationary structure and the movable structure is a magnetic structure.

4. The optical lens according to claim 2, characterized in that: A guide groove is provided between the static structure and the focusing housing, and the groove length direction of the guide groove is parallel to the central axis. The focusing group also includes a focusing frame for fixing the lens, and the movable structure is arranged on the focusing frame. The focusing frame is provided with a guide block slidably arranged in the guide groove, and the guide block can move along the groove length direction of the guide groove.

5. The optical lens according to claim 4, characterized in that: A fixing groove is provided on the outer peripheral surface of the focusing frame, and the movable structure is fixed in the fixing groove.

6. The optical lens according to claim 1, wherein: The electric drive component includes a stationary structure and a movable structure, the stationary structure is arranged on the focusing housing, and the movable structure is arranged on the lens. The stationary structure includes a magnet and a metal elastic body arranged on the magnet, and the magnet is arranged on the focusing housing. The movable structure includes a moving body, and the moving body is arranged on the lens. When a high-frequency AC voltage is applied to the magnet, the inverse piezoelectric effect or the electrostrictive effect is used to make the metal elastic body generate microscopic mechanical vibrations, thereby causing the moving body to move along the central axis.

7. The optical lens according to any one of claims 1 to 6, characterized in that: The front lens group comprises a front group housing and a front group lens, the front group housing is connected to the focusing housing, and the front group lens is arranged in the front group housing and located on the central axis.

8. The optical lens according to any one of claims 1 to 6, characterized in that: The rear lens group includes a rear group housing and a rear group lens, the rear group housing is connected to the focusing housing, and the rear group lens is arranged in the rear group housing and located on the central axis.

9. The optical lens according to any one of claims 1 to 6, characterized in that: The optical lens further comprises an image sensor, which is arranged at one end of the rear lens group away from the focusing group, and the image sensor is located on the central axis.

10. An endoscope, characterized in that: The invention comprises an endoscope body and the optical lens according to any one of claims 1 to 9, wherein the optical lens is arranged on the endoscope body.

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