Focusing lens and imaging device

Abstract

The embodiment of the invention discloses a focus-adjustable lens and an imaging device, relates to the technical field of lens imaging, and can effectively improve the integration capability of a lens functional module. The focus-adjustable lens comprises a lens shell, a focusing wheel, a lens module, a functional module and a transmission mechanism, the lens shell is provided with a window; at least one end of the focusing wheel sleeves the lens shell, and the focusing wheel is rotationally connected with the lens shell; the lens module is arranged in the containing cavity, at least part of the containing cavity is formed by the lens shell, the light incident side face of the lens module faces the window, the lens module is movably connected with the lens shell, and the central axis of the lens module deviates from the central axis of the lens shell; the rotating axis of the focusing wheel deviates from the central axis of the lens module; at least part of the functional module is arranged in the accommodating cavity, the functional module and the lens module are arranged in parallel, and the functional module faces the window so as to emit or receive light through the window; the transmission mechanism enables the focusing wheel and the lens module to be in transmission connection and is used for converting force brought by rotation of the focusing wheel around the rotation axis of the focusing wheel into force enabling the lens module to move along the central axis of the lens module. The method is suitable for optimizing the internal space structure of the focusable lens and configuring a scene of a plurality of functional modules for the lens module.

Description

Technical Field

[0001] The present application relates to the field of lens imaging technology, and in particular to a focusable lens and an imaging device. Background Art

[0002] In real scenarios, the lens of an imaging device often has multiple functional modules, such as an imaging module that requires focusing, a laser ranging module, a fill light module, etc. Setting each functional module separately will cause the lens to be larger in size, irregular in appearance, and make the focusing operation of the imaging module inconvenient. Summary of the invention

[0003] In view of this, the present application provides a focus-adjustable lens and an imaging device to improve the integration capability of a lens function module.

[0004] In a first aspect, an embodiment of the present invention provides a focusable lens, comprising: a lens housing, wherein the lens housing is provided with a viewing window; a focusing wheel, wherein at least one end of the focusing wheel is sleeved on the lens housing, and the focusing wheel is rotatably connected to the lens housing; a lens module, wherein the lens module is disposed in an accommodating cavity, wherein the accommodating cavity is at least partially formed by the lens housing, wherein the light incident side of the lens module faces the viewing window, and the lens module is movably connected to the lens housing, wherein a central axis of the lens module deviates from the central axis of the lens housing; and a rotation axis of the focusing wheel deviates from the central axis of the lens module; a functional module, wherein at least a portion of the functional module is disposed in the accommodating cavity and is arranged in parallel with the lens module, wherein the functional module faces the viewing window to emit or receive light through the viewing window; and a transmission mechanism, wherein the transmission mechanism transmission-connects the focusing wheel and the lens module, and is used for converting a force brought about by the rotation of the focusing wheel around the rotation axis of the focusing wheel into a force for moving the lens module along the central axis of the lens module.

[0005] In a specific implementation, the lens housing includes a rear housing and a front housing; a lens connection hole with a cylindrical structure is provided in the rear housing, and one end of the lens module is passed through the lens connection hole and is threadedly connected to the lens connection hole; or a lens connection hole with a cylindrical structure is provided in the front housing, and one end of the lens module is passed through the lens connection hole and is threadedly connected to the lens connection hole.

[0006] In a specific implementation scheme, the transmission mechanism is a connecting rod transmission mechanism; the connecting rod transmission mechanism includes a sliding member and an elastic member; wherein the focusing wheel includes a cylinder with two ends passing through, the inner wall of the cylinder is provided with a constraint groove, the outer wall of the lens module is provided with a sliding cylinder, the elastic member is arranged in the sliding cylinder, the sliding member is a rod-shaped structure, and the first end of the sliding member extends into the sliding cylinder and abuts against the elastic member, and the second end of the sliding member extends into the constraint groove.

[0007] In a specific embodiment, the constraint groove is a through groove structure with two ends penetrating through.

[0008] In a specific embodiment, the outer wall of the sliding member is provided with a disc-shaped structure, the outer diameter of the disc-shaped structure is larger than the inner diameter of the sliding cylinder; the first end of the sliding member is provided with a receiving cavity, and the elastic member is embedded in the receiving cavity.

[0009] In a specific implementation scheme, the transmission mechanism is a gear transmission mechanism, and the focusing wheel includes a barrel with two ends passing through; the gear transmission mechanism includes: internal teeth arranged on the inner wall of the barrel; external teeth arranged on the outer wall of the lens module; and a transition gear connected to the lens housing, and the transition gear is respectively meshed with the internal teeth and the external teeth.

[0010] In a specific implementation, the rear shell includes a lens holder, the lens connecting hole is arranged on the lens holder, a stopper is arranged on the lens holder, a limiting groove is circumferentially provided on the outer wall of the lens module, and one end of the stopper extends into the limiting groove; wherein, the limiting groove is an annular groove arranged on the outer wall of the lens module, and in the direction of the central axis of the lens module, the width of the annular groove is greater than the width of the stopper, and the stopper is fixedly connected to the lens holder, the lens module is rotated to a first angle relative to the lens holder, and one side wall of the annular groove is limited by the stopper, and the lens module is rotated to a second angle relative to the lens holder, and the other side wall of the annular groove is limited by the stopper; or, The limiting groove is a spiral groove arranged on the outer wall of the lens module. In the direction of the central axis of the lens module, the stopper is slidably connected to the lens holder. When the lens module is rotated to a first angle relative to the lens holder, one end of the spiral groove is limited by the stopper. When the lens module is rotated to a second angle relative to the lens holder, the other end of the spiral groove is limited by the stopper.

[0011] In a specific implementation, the limit range of the limit groove, the deformation amount of the elastic member, and the length of the sliding member satisfy a preset relationship, so that when the lens module is rotated to a first angle relative to the lens holder or the lens module is rotated to a second angle relative to the lens holder, the second end of the sliding member always extends into the constraint groove.

[0012] In a specific embodiment, the rear shell further includes a cover shell with two ends through, the cover shell is sleeved on the lens holder and connected to the lens holder; one end of the cover shell extends to form a connecting arm, and the end of the connecting arm is connected to the front shell; the focusing wheel is arranged between the cover shell and the front shell, and surrounds the connecting arm, wherein one end of the focusing wheel is rotatably connected to the front shell, and the other end of the focusing wheel is rotatably connected to the cover shell; the viewing window includes a first viewing window arranged on the front shell, and the light inlet of the lens module corresponds to the first viewing window.

[0013] In a specific embodiment, the functional module is arranged in the space defined by the focusing wheel, the rear shell and the front shell, wherein the functional module includes a laser ranging module and / or a fill light module; the window also includes a second window and / or a third window arranged on the front shell, wherein the ranging port of the laser ranging module corresponds to the second window, and the light exit port of the fill light module corresponds to the third window.

[0014] In a second aspect, an embodiment of the present invention further provides an imaging device, comprising: a focusable lens and an imaging board; an image sensor is provided on the imaging board; the imaging board is connected to the focusable lens; wherein the focusable lens is any one of the focusable lenses described in the embodiments of the present application, and the relative position of the imaging board and the lens housing is fixed.

[0015] The embodiments of the present invention provide a focusable lens and an imaging device, comprising: a lens housing, a focusing wheel, a lens module, a functional module, and a transmission mechanism; the lens housing is provided with a viewing window; at least one end of the focusing wheel is sleeved on the lens housing, and the focusing wheel is rotatably connected to the lens housing; the lens module is arranged in an accommodating cavity, the accommodating cavity is at least partially formed by the lens housing, the light incident side of the lens module faces the viewing window, and the lens module is movably connected to the lens housing, wherein the central axis of the lens module deviates from the central axis of the lens housing; the rotation axis of the focusing wheel deviates from the central axis of the lens module; the functional module is at least partially arranged in the accommodating cavity, and is arranged in parallel with the lens module, the functional module faces the viewing window to emit or receive light through the viewing window; the transmission mechanism transmission-connects the focusing wheel and the lens module, and is used to convert the force brought about by the rotation of the focusing wheel around the rotation axis of the focusing wheel into a force for moving the lens module along the central axis of the lens module. The focus wheel of the present invention realizes the focusing function in a manner of being eccentrically arranged relative to the lens module, which makes it easy to configure a more compact space inside the focusable lens according to the structural shape of the focusable lens to arrange the corresponding functional modules, thereby increasing the effective utilization space inside the focusable lens and improving the integration capability of the functional modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art 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 paying creative work.

[0017] Figure 1 A schematic diagram of a focus-adjustable lens configured with a connecting rod transmission mechanism provided in an embodiment of the present application; Figure 2 A schematic axial cross-sectional view of a focus-adjustable lens configured with a connecting rod transmission mechanism provided in an embodiment of the present application; Figure 3 A schematic cross-sectional view of a focus-adjustable lens configured with a connecting rod transmission mechanism provided in an embodiment of the present application; Figure 4 A schematic diagram of a focus wheel constraint groove of a focus-adjustable lens configured with a connecting rod transmission mechanism provided in an embodiment of the present application; Figure 5 A schematic diagram of a focus-adjustable lens configured with a gear transmission mechanism provided in an embodiment of the present application; Figure 6 A schematic cross-sectional view of a focus-adjustable lens configured with a gear transmission mechanism provided in an embodiment of the present application; Figure 7 A schematic diagram of the inner teeth of a focus wheel of a focus-adjustable lens configured with a gear transmission mechanism provided in an embodiment of the present application; Figure 8 A schematic axial cross-sectional view of a focusable lens configured with a gear transmission mechanism provided in an embodiment of the present application.

[0018] Description of main reference numerals: 100-adjustable focus lens; 10-lens bracket; 11-lens connecting hole; 12-stopper; 13-wall hole; 14-gear seat; 15-gear shaft; 20-lens module; 21-slide; 22-external teeth; 23-limiting groove; 30-focusing wheel; 31-constraint groove; 32-internal teeth; 41-sliding member; 42-elastic member; 43-transition gear; 50-cover; 51-connecting arm; 60-front shell; 61-first window; 62-second window; 63-third window; 70-laser ranging module; 80-fill light module; 200-imaging board. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0020] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the prior art, the lens of an imaging device often has multiple functional modules, such as an imaging module that needs to be focused, a laser ranging module, a fill light module, etc. The separate arrangement of each functional module will cause the lens to be larger in size, irregular in appearance, and make the focusing operation of the imaging module inconvenient. In order to optimize the internal space structure of the focusable lens and improve the integration capability of the functional modules, on the first hand, Figure 1 As shown, an embodiment of the present invention provides a focus-adjustable lens 100 , which may include: a lens housing, a focus wheel 30 , a lens module 20 , and a functional module.

[0022] The lens housing is provided with a viewing window, at least one end of the focus wheel 30 is sleeved on the lens housing, and the focus wheel 30 is rotatably connected to the lens housing. The shape of the focus wheel 30 can be adaptively configured according to the product structure. For example, when the focusing distance is small, the focus wheel 30 can achieve the focusing distance when it rotates at a small angle, so the focus wheel 30 can be designed to be semicircular or arc-shaped. In order to improve the compactness of the structure, the focus wheel 30 can also be designed as a component of the protective structure of the focusable lens 100, and together with other components such as the lens housing, an enclosing space is formed to protect the components in the enclosing space, so that the focus wheel 30 itself also constitutes a partial protective structure of the focusable lens 100 while achieving the focusing capability, thereby making full use of the structural function of the focus wheel 30.

[0023] The lens module 20 is arranged in the accommodating cavity, which is at least partially formed by the lens housing. The light incident side of the lens module 20 faces the viewing window, and the lens module 20 is movably connected to the lens housing, wherein the central axis of the lens module 20 deviates from the central axis of the lens housing; the rotation axis of the focus wheel 30 deviates from the central axis of the lens module 20; the accommodating cavity can be formed by the lens housing, or can be formed by the lens housing and other components such as the focus wheel 30, so as to provide accommodation space and protection for the lens module 20, etc. The lens module 20 can be inserted into the lens housing and connected to the lens housing, so that the lens housing provides support for the lens module 20. The lens module 20 can be a cylindrical housing structure, and a lens for imaging can be arranged in the cylindrical housing structure, and each lens is arranged along the imaging optical axis of the lens module 20. The functional module is at least partially arranged in the accommodating cavity and arranged in parallel with the lens module 20. The functional module faces the viewing window to emit or receive light through the viewing window. The functional module can be a component with a specific function or an auxiliary component of the lens module 20.

[0024] In this embodiment, Figure 2 , Figure 3 As shown, the central axis of the lens module 20 deviates from the central axis of the lens housing; the rotation axis of the focus wheel 30 deviates from the central axis of the lens module 20, which is beneficial to optimizing the internal structural space of the focusable lens 100. For example, the outer diameter of the lens module 20 is 40 mm, and the inner diameter of the focus wheel 30 is 60 mm. If the rotation axis of the focus wheel 30 is coaxially arranged with respect to the central axis of the lens module 20, the maximum radial gap between the two is 10 mm, that is, the two can only accommodate components with a maximum size of 10 mm in the radial direction. However, if the rotation axis of the focus wheel 30 is eccentrically arranged with respect to the central axis of the lens module 20, the maximum radial gap between the two can reach 20 mm, that is, the two can accommodate components with a maximum size of 20 mm in the radial direction. It can be seen that the layout mode in which the rotation axis of the focus wheel 30 deviates from the central axis of the lens module 20 in this embodiment can optimize the internal structural space of the focusable lens 100 and improve the accommodating capacity and space utilization rate of the focusable lens 100 for functional modules.

[0025] In this embodiment, the transmission mechanism transmits the focus wheel 30 and the lens module 20 to each other, and is used to convert the force caused by the focus wheel 30 rotating around the rotation axis of the focus wheel 30 into a force that causes the lens module 20 to move along the central axis of the lens module 20. The focus wheel 30 is transmitted to the lens module 20, and when the focus wheel 30 rotates, the lens module 20 is driven to move relative to the lens housing along the central axis of the lens module 20. When the imaging device is equipped with the focusable lens 100, the relative position of the imaging board 200 of the imaging device and the lens housing is fixed, such as Figure 2 As shown, by moving the lens module 20 relative to the lens housing along the direction of the central axis of the lens module 20, the distance between the lens module 20 and the imaging board 200 along the central axis of the lens module 20 can be adjusted, thereby realizing the focusing function of the lens module 20. The central axis of the lens module 20 can be specifically the imaging optical axis of the lens module 20. Adjusting the lens module 20 along the central axis of the lens module 20, that is, adjusting the distance between the lens module 20 and the imaging board 200 along the imaging optical axis.

[0026] The focusable lens 100 provided by the embodiment of the present invention comprises: a lens housing, a focus wheel 30, a lens module 20, a functional module, and a transmission mechanism; the lens housing is provided with a window; at least one end of the focus wheel 30 is sleeved on the lens housing, and the focus wheel 30 is rotatably connected to the lens housing; the lens module 20 is arranged in an accommodating cavity, the accommodating cavity is at least partially formed by the lens housing, the light incident side of the lens module 20 faces the window, and the lens module 20 is movably connected to the lens housing, wherein the central axis of the lens module 20 deviates from the central axis of the lens housing; the rotation axis of the focus wheel 30 deviates from the central axis of the lens module 20; the functional module is at least partially arranged in the accommodating cavity, and is arranged in parallel with the lens module 20, and the functional module faces the window to emit or receive light through the window; the transmission mechanism transmission connects the focus wheel 30 and the lens module 20, and is used to convert the force brought by the rotation of the focus wheel 30 around the rotation axis of the focus wheel 30 into a force that moves the lens module 20 along the central axis of the lens module 20. The focus wheel 30 of the present invention realizes the focusing function by being eccentrically arranged relative to the lens module 20, so that a more compact space can be configured inside the focusable lens 100 according to the structural shape of the focusable lens 100 to arrange corresponding functional modules, thereby increasing the effective utilization space inside the focusable lens 100 and improving the integration capability of the functional modules.

[0027] Optionally, in one embodiment of the present invention, the lens housing includes a rear housing and a front housing 60; a lens connection hole 11 of a cylindrical structure is provided in the rear housing, and one end of the lens module 20 is penetrated through the lens connection hole 11 and is threadedly connected to the lens connection hole 11; or a lens connection hole 11 of a cylindrical structure is provided in the front housing, and one end of the lens module 20 is penetrated through the lens connection hole 11 and is threadedly connected to the lens connection hole 11. According to the structural layout of the focus-adjustable lens 100, the lens connection hole 11 is provided in the rear housing or the front housing 60, and one end of the lens module 20 is threadedly connected to the lens connection hole 11. In this way, by rotating the lens module 20, under the action of the threaded connection between the lens module 20 and the lens connection hole 11, the relative position of the lens module 20 and the lens housing can be adjusted along the central axis direction of the lens module 20 to change the distance between the lens module 20 and the imaging board 200, thereby realizing the focusing function of the lens module 20.

[0028] There can be multiple transmission mechanisms between the barrel of the focusing wheel 30 and the lens module 20. Optionally, in one embodiment of the present invention, the transmission mechanism is a connecting rod transmission mechanism; the connecting rod transmission mechanism includes a sliding member 41 and an elastic member 42; wherein, the focusing wheel 30 includes a barrel with two ends through, the inner wall of the barrel is provided with a constraint groove 31, the outer wall of the lens module 20 is provided with a slide barrel 21, the elastic member 42 is arranged in the slide barrel 21, the sliding member 41 is a rod-shaped structure, and the first end of the sliding member 41 extends into the slide barrel 21 and abuts against the elastic member 42, and the second end of the sliding member 41 extends into the constraint groove 31.

[0029] For this structural configuration, the rotation axis of the focus wheel 30 is fixed relative to the rotation center of the lens module 20, which can be equivalent to a frame. The rotation connection position of the focus wheel 30 and the sliding member 41 rotates relative to the rotation axis of the focus wheel 30, which can be equivalent to a crank. The sliding connection position of the lens module 20 and the sliding member 41 rotates relative to the rotation center of the lens module 20, which can be equivalent to a guide rod. The sliding member 41 is rotationally connected to the focus wheel 30 and slidably connected to the lens module 20, which can be equivalent to a slider. When the lens module 20 is configured to rotate around the rotation center of the lens module 20, the above-mentioned equivalent frame, crank, guide rod, and slider constitute a rotary guide rod mechanism. During the rotation of the rotary guide rod mechanism, for example, the focus wheel 30 moves from Figure 3 When the rotation angle of the position shown is 90°, since the central axis of the lens module 20 is eccentrically arranged above the rotation axis of the focus wheel 30, the rotation angle of the lens module 20 is greater than 90°, and a relative angle change occurs between the sliding member 41 and the focus wheel 30, that is, the sliding member 41 rotates relative to the focus wheel 30. In addition, when the lens module 20 moves along the central axis of the lens module 20, the sliding member 41 will move along the constraint groove 31 of the focus wheel 30 with the lens module 20. Therefore, in this embodiment, the second end of the sliding member 41 extends into the constraint groove 31 of the inner wall of the focus wheel 30, so that the sliding member 41 can rotate and slide relative to the focus wheel 30. In addition, under the action of the elastic member 42, the sliding member 41 moves relative to the slide cylinder 21 of the outer wall of the lens module 20. Therefore, in this embodiment, the first end of the sliding member 41 extends into the slide cylinder 21 of the outer wall of the lens module 20, so that the sliding member 41 can slide relative to the lens module 20, thereby meeting the relative movement requirements. Similarly, the sliding member 41 can also be configured to rotate and slide relative to the lens module 20, and the sliding member 41 can slide relative to the barrel of the focusing wheel 30. A rotary guide rod mechanism can also be implemented so that when the focusing wheel 30 rotates, the lens module 20 is driven to rotate relative to the lens housing. This embodiment does not limit this.

[0030] When the connecting rod transmission mechanism is configured so that the sliding member 41 can slide relative to the lens module 20, and the sliding member 41 can rotate relative to the barrel of the focusing wheel 30, there are multiple sliding modes of the sliding member 41 relative to the lens module 20. For example, the sliding member 41 can be a rod-shaped structure, and a sliding cylinder 21 or a sliding hole is provided on the outer wall of the lens module 20. One end of the sliding member 41 extends into the sliding cylinder 21 or the sliding hole, and slides relative to the sliding cylinder 21 or the sliding hole, thereby realizing the sliding connection between the sliding member 41 and the lens module 20; there are also multiple rotation modes of the sliding member 41 relative to the barrel of the focusing wheel 30. For example, a rotating hole with a complete circumferential structure can be provided on the inner wall of the barrel, and a rotating shaft is provided at the end of the sliding member 41. The rotating shaft is penetrated by the rotating hole. The rotating hole with a complete circumferential structure can constrain the rotating shaft in the radial direction so that the rotating shaft does not separate from the rotating hole, thereby realizing the sliding member 4 1 is connected to the cylinder body in rotation; further, a wall-missing rotating hole with a structure larger than half a circumference can be provided on the inner wall of the cylinder body, and the wall-missing rotating hole is also a groove-shaped structure. A rotating shaft is provided at the end of the sliding member 41, and the rotating shaft is passed through the wall-missing rotating hole. Since the wall-missing rotating hole has a structure larger than half a circumference, the rotating shaft can still be constrained radially so that the rotating shaft does not separate from the wall-missing rotating hole, thereby realizing the rotation connection between the sliding member 41 and the cylinder body; however, providing a rotating hole with a complete circumference structure or a wall-missing rotating hole with a structure larger than half a circumference on the inner wall of the cylinder body of the focusing wheel 30 will increase the structural complexity and processing difficulty, and if a wall-missing rotating hole with a structure smaller than half a circumference is opened on the inner wall of the cylinder body of the focusing wheel 30, the processing difficulty will be reduced, but the wall-missing rotating hole with a structure smaller than half a circumference cannot completely constrain the rotating shaft radially, and the rotating shaft is easily separated from the wall-missing structure of the wall-missing rotating hole. Therefore, in order to reduce the structural complexity and processing difficulty, such as Figure 2 , Figure 3As shown, in this embodiment, the connecting rod transmission mechanism also includes an elastic member 42 arranged in the slide cylinder 21. The elastic member 42 can be a cylindrical spring, etc., so that the constraint groove 31 can be designed as a trapezoidal groove or an arc groove. The arc of the arc groove can be a minor arc less than half a circumference, and the groove size of the trapezoidal groove or the arc groove can be larger than the groove bottom size. The spatial size of the constraint groove 31 can be larger than the physical size of the second end of the sliding member 41 constrained by it, so that after the second end of the sliding member 41 extends into the constraint groove 31, it can rotate relative to the focusing wheel 30 and can slide relative to the constraint groove 31 of the focusing wheel 30. The first end of the sliding member 41 extends into the slide cylinder 21 and abuts against the elastic member 42. Under the action of the elastic force, the second end of the sliding member 41 can always extend into the constraint groove 31 on the inner wall of the cylinder of the focusing wheel 30, so that when the second end of the sliding member 41 rotates relative to the cylinder of the focusing wheel 30, the second end of the sliding member 41 is always constrained in the constraint groove 31 on the inner wall of the cylinder, so that the sliding member 41 can rotate relative to the focusing wheel 30 and can slide relative to the constraint groove 31 of the focusing wheel 30. It can be understood that, compared with providing a rotating hole with a complete circumference structure or a rotating hole with a missing wall structure larger than half a circumference on the inner wall of the barrel of the focusing wheel 30, the constraint groove 31 of this embodiment can optimize the component structure of the connecting rod transmission mechanism, and the sliding member 41 does not need to be configured with a rotating shaft that matches the rotating hole or the rotating hole with a missing wall, which further reduces the complexity of the component structure. Compared with assembling the rotating connection structure of the sliding member 41 and the focusing wheel 30 on the inner wall of the barrel of the focusing wheel 30, this embodiment assembles the elastic member 42 and the sliding member 41 in the slide cylinder 21 on the outer wall of the lens module 20, which has a more convenient operating space and can improve the efficiency of component assembly. Optionally, in one embodiment of the present invention, the constraint groove 31 is a through groove structure with two ends through. Figure 4 As shown, a constraint groove 31 with two ends penetrating therethrough is provided on the inner wall of the cylinder of the focusing wheel 30. On the basis of ensuring the relative movement between the sliding member 41 and the focusing wheel 30, tool processing can be facilitated to reduce the processing difficulty. In addition, during assembly, when the first end of the sliding member 41 is installed on the slide cylinder 21 of the outer wall of the lens module 20, since the constraint groove 31 on the inner wall of the focusing wheel 30 is a through groove structure with two ends penetrating therethrough, it is convenient to dock and introduce the second end of the sliding member 41 from one end of the constraint groove 31, and smoothly sleeve and install the focusing wheel 30 on the radial outer side of the lens module 20, thereby further improving the convenience of installation.

[0031] Optionally, in one embodiment of the present invention, the outer wall of the sliding member 41 is provided with a disc-shaped structure, and the outer diameter of the disc-shaped structure is larger than the inner diameter of the slide 21; the first end of the sliding member 41 is provided with a receiving cavity, and the elastic member 42 is embedded in the receiving cavity. The receiving cavity provided at the first end of the sliding member 41 facilitates the pre-installation of the elastic member 42 and the sliding member 41, and then the first end of the sliding member 41 is installed into the slide 21. The outer diameter of the disc-shaped structure of the outer wall of the sliding member 41 is larger than the inner diameter of the slide 21, so that the sliding member 41 has an installation limit and foolproof function when assembling the slide 21, and can prevent the sliding member 41 from extending too far into the slide 21, resulting in excessive compression of the elastic member 42, so that the elastic member 42 is in a safe use state, ensuring the service life of the elastic member 42.

[0032] The transmission mechanism between the barrel of the focusing wheel 30 and the lens module 20 may also adopt gear transmission. For example, internal teeth 32 may be arranged on the inner wall of the barrel of the focusing wheel 30, and external teeth 22 may be arranged on the outer wall of the lens module 20. The transmission connection between the focusing wheel 30 and the lens module 20 is realized by the meshing transmission of the internal teeth 32 and the external teeth 22. However, since the radial sizes of the multiple lenses in the lens module 20 may be different, the lens module 20 is a variable diameter structure along the imaging optical axis direction. In order to directly mesh with the internal teeth 32 on the inner wall of the barrel of the focusing wheel 30, the external teeth 22 on the outer wall of the lens module 20 need to be designed with a larger outer diameter, which will affect the structural space and compactness inside the focusable lens 100. To solve this problem, it is optional, such as Figure 5 As shown, in one embodiment of the present invention, the transmission mechanism is a gear transmission mechanism, the focus wheel 30 includes a cylinder with two ends through, and the gear transmission mechanism includes: internal teeth 32 provided on the inner wall of the cylinder; external teeth 22 provided on the outer wall of the lens module 20; and a transition gear 43 connected to the lens housing, the transition gear 43 meshing with the internal teeth 32 and the external teeth 22 respectively. It can be understood that, as Figure 6 As shown, due to the configuration of the transition gear 43, the outer teeth 22 on the outer wall of the lens module 20 do not need to directly mesh with the inner teeth 32 on the inner wall of the focusing wheel 30 barrel, so that the outer diameter of the outer teeth 22 can be smaller, thereby further optimizing the structural space inside the focusable lens 100. Since the focusing distance of the focusable lens 100 and the pitch of the connecting thread of the lens module 20 and the lens connecting hole 11 may be different, the focusing wheel 30 can be rotated multiple times to reach the focusing distance, or it can be rotated no more than one turn to reach the focusing distance. Therefore, as Figure 7As shown, the inner teeth 32 can be arranged on the entire circumference of the inner wall of the cylinder of the focus wheel 30, or on a partial circumference of the inner wall of the cylinder of the focus wheel 30. Similarly, the outer teeth 22 can be arranged on the entire circumference of the outer wall of the lens module 20, or on a partial circumference of the outer wall of the lens module 20. Among them, a gear seat 14 can be arranged on the lens housing, a gear shaft 15 is passed through the gear seat 14, and the transition gear 43 can be sleeved on the gear shaft 15 and axially positioned by components such as a retaining spring.

[0033] The focusable lens 100 usually has a limited focus distance. When the focus distance limit is reached, the movement of the lens module 20 needs to be limited. Therefore, optionally, Figure 5 , Figure 8 As shown, in one embodiment of the present invention, the rear shell includes a lens holder 10, a lens connecting hole 11 is arranged on the lens holder 10, a stopper 12 is arranged on the lens holder 10, a limiting groove 23 is circumferentially provided on the outer wall of the lens module 20, and one end of the stopper 12 extends into the limiting groove 23; wherein, the limiting groove 23 is an annular groove arranged on the outer wall of the lens module 20, and in the direction of the central axis of the lens module 20, the width of the annular groove is greater than the width of the stopper 12, and the stopper 12 is fixedly connected to the lens holder 10, the lens module 20 is rotated to a first angle relative to the lens holder 10, and one side wall of the annular groove is limited by the stopper 12, and the lens module 20 is rotated to a second angle relative to the lens holder 10, and the other side wall of the annular groove is limited by the stopper 12. It can be understood that by limiting the first angle of the lens module 20 rotating in the clockwise direction relative to the lens holder 10, or the second angle of the lens module 20 rotating in the counterclockwise direction, it can be avoided that the lens module 20 and the lens connection hole 11 are locked due to excessive rotation of the focus wheel 30 during use, which exceeds the thread matching range of the lens module 20 and the lens connection hole 11, causing damage to the matching threads between the lens module 20 and the lens connection hole 11. Optionally, in one embodiment of the present invention, the lens connection hole 11 on the lens holder 10 is a cylindrical structure, and the first end of the lens module 20 is penetrated through the cylindrical structure and is threadedly connected to the cylindrical structure; the limiting groove 23 is provided at the first end of the lens module 20, and the cylindrical structure is provided with a wall hole 13 at a position corresponding to the limiting groove 23, and the stopper 12 is penetrated through the wall hole 13 and connected to the cylindrical structure.

[0034] Alternatively, this embodiment provides another limiting structure, in which the limiting groove 23 is a spiral groove provided on the outer wall of the lens module 20. In the direction of the central axis of the lens module 20, the stopper 12 is slidably connected to the lens holder 10. When the lens module 20 rotates to a first angle relative to the lens holder 10, one end of the spiral groove is limited by the stopper 12. When the lens module 20 rotates to a second angle relative to the lens holder 10, the other end of the spiral groove is limited by the stopper 12. During the rotation of the lens module 20 relative to the lens holder 10, the stopper 12 can slide relative to the lens holder 10, and the two ends of the spiral structure of the spiral groove and the stopper 12 are configured as a stopper structure for the focus distance limit, and the movement of the lens module 20 can also be limited in the direction of the central axis of the lens module 20.

[0035] In order to ensure that when the lens module 20 is focused within the range, the expected motion relationship between the slider 41, the focus wheel 30 and the lens module 20 is always maintained, optionally, in one embodiment of the present invention, the range of the limit groove 23, the deformation of the elastic member 42, and the length of the slider 41 meet a preset relationship, so that when the lens module 20 is rotated to the first angle relative to the lens holder 10 or the lens module 20 is rotated to the second angle relative to the lens holder 10, the second end of the slider 41 always extends into the constraint groove 31. In this way, in the process of rotating the focus wheel 30 to drive the lens module 20 to focus within the focus range, the second end of the slider 41 can always be constrained by the constraint groove 31, so as to ensure that the slider 41 can rotate and slide relative to the focus wheel 30, and the slider 41 can slide relative to the lens module 20.

[0036] Optionally, in one embodiment of the present invention, Figure 1 , Figure 5As shown, the rear shell body also includes a cover shell 50 with two ends through, the cover shell 50 is sleeved on the lens holder 10 and connected to the lens holder 10; one end of the cover shell 50 extends to form a connecting arm 51, and the end of the connecting arm 51 is connected to the front shell body 60; the focusing wheel 30 is arranged between the cover shell 50 and the front shell body 60, and surrounds the connecting arm 51, wherein one end of the focusing wheel 30 is rotatably connected to the front shell body 60, and the other end of the focusing wheel 30 is rotatably connected to the cover shell 50; the window includes a first window 61 arranged on the front shell body 60, and the light inlet of the lens module 20 corresponds to the first window 61. In this embodiment, the focus wheel 30 is located between the cover shell 50 and the front shell 60, and the two ends of the focus wheel 30 are rotatably connected to the cover shell 50 and the front shell 60 respectively. For example, the two ends of the focus wheel 30 can be respectively sleeved on the cover shell 50 and the front shell 60. Compared with the structure in which the focus wheel 30 is designed at the end of the focusable lens 100, the cover shell 50 and the front shell 60 of the present application can form a more stable and reliable rotation support for the focus wheel 30. In addition, the cover shell 50, the front shell 60, and the focus wheel 30 can jointly form a lens barrel, which has a protective effect on the lens module 20 and the functional module located in the lens barrel. , so as to further make full use of the structural function of the focus wheel 30, the outer contours of the cover shell 50, the front shell 60, and the focus wheel 30 can be flush or smoothly transitioned, so that the focusable lens 100 has a regular appearance and a compact structure, and the connecting arm 51 formed by axially extending at one end of the cover shell 50 can be one or more, and the multiple connecting walls can form a more secure connection with the front shell 60. For example, on the circumference of one end of the cover shell 50, multiple connecting arms 51 are extended axially, and the multiple connecting walls can be distributed on the local circumference of one end of the cover shell 50 to further optimize the structural space.

[0037] As mentioned above, the focus wheel 30 of the present application is arranged eccentrically relative to the lens module 20 to achieve the focusing function, so that a more compact space can be formed inside the focusable lens 100, the available space is increased, more structural components can be arranged, and the integration capability of the functional modules is improved. Therefore, optionally, in one embodiment of the present invention, Figure 1 , Figure 5 As shown, the functional module is arranged in the space defined by the focus wheel 30, the rear housing and the front housing 60, wherein the functional module includes a laser distance measuring module 70 and / or a fill light module 80; the window also includes a second window 62 and / or a third window 63 arranged in the front housing 60, wherein the distance measuring port of the laser distance measuring module 70 corresponds to the second window 62, and the light exit port of the fill light module 80 corresponds to the third window 63. It can be seen that this embodiment improves the accommodating capacity and space utilization rate of the focusable lens 100 for the functional modules by optimizing the internal structural space of the focusable lens 100, so that the focusable lens 100 can be further configured with functional modules such as the laser distance measuring module 70, the fill light module 80, etc.

[0038] In a second aspect, an embodiment of the present invention further provides an imaging device that can improve the integration capability of a lens function module.

[0039] The imaging device provided in the embodiment of the present application may include: a focusable lens 100 and an imaging board 200; an image sensor is provided on the imaging board 200; the imaging board 200 is connected to the focusable lens 100; wherein the focusable lens 100 is any of the focusable lenses 100 described in the embodiment of the present application, and the relative position of the imaging board 200 and the lens housing is fixed. Since the relative position of the imaging board 200 and the lens housing is fixed, the lens module 20 can be driven to move a preset distance relative to the imaging board 200 along the central axis of the lens module 20 by rotating the focus wheel 30 by a preset angle, so as to achieve a focusing distance that meets the imaging requirements.

[0040] Therefore, the imaging device provided by the embodiment of the present invention is equipped with a focusable lens 100 including a lens housing, a focus wheel 30, a lens module 20, a functional module, and a transmission mechanism; the lens housing is provided with a window; at least one end of the focus wheel 30 is sleeved on the lens housing, and the focus wheel 30 is rotatably connected to the lens housing; the lens module 20 is arranged in an accommodating cavity, the accommodating cavity is at least partially formed by the lens housing, the light incident side of the lens module 20 faces the window, and the lens module 20 is movably connected to the lens housing, wherein the central axis of the lens module 20 deviates from the central axis of the lens housing; the rotation axis of the focus wheel 30 deviates from the central axis of the lens module 20; the functional module is at least partially arranged in the accommodating cavity, and is arranged in parallel with the lens module 20, and the functional module faces the window to emit or receive light through the window; the transmission mechanism transmission connects the focus wheel 30 and the lens module 20, and is used to convert the force brought by the rotation of the focus wheel 30 around the rotation axis of the focus wheel 30 into a force that causes the lens module 20 to move along the central axis of the lens module 20. The focus wheel 30 of the present invention realizes the focusing function by being eccentrically arranged relative to the lens module 20, so that a more compact space can be configured inside the focusable lens 100 according to the structural shape of the focusable lens 100 to arrange corresponding functional modules, thereby increasing the effective utilization space inside the focusable lens 100 and improving the integration capability of the functional modules.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0042] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0043] In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0044] For the convenience of description, the above device is described by dividing the functions into various units / modules. Of course, when implementing the present invention, the functions of each unit / module can be implemented in the same or multiple software and / or hardware.

[0045] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A focusable lens, characterized in that: include: A lens housing, wherein the lens housing is provided with a viewing window; A focus wheel, at least one end of which is sleeved on the lens housing, and the focus wheel is rotatably connected to the lens housing; A lens module, wherein the lens module is disposed in an accommodating cavity, the accommodating cavity is at least partially formed by the lens housing, the light incident side of the lens module faces the viewing window, and the lens module is movably connected to the lens housing, wherein the central axis of the lens module deviates from the central axis of the lens housing; and the rotation axis of the focus wheel deviates from the central axis of the lens module; a functional module, wherein the functional module is at least partially disposed in the accommodating cavity and arranged in parallel with the lens module, and the functional module faces the window to emit or receive light through the window; A transmission mechanism connects the focus wheel and the lens module in a transmission manner, and is used to convert the force brought about by the focus wheel rotating around the rotation axis of the focus wheel into a force for moving the lens module along the central axis of the lens module.

2. The focus-adjustable lens according to claim 1, wherein: The lens housing comprises a rear housing and a front housing; A cylindrical lens connection hole is provided in the rear housing, and one end of the lens module is passed through the lens connection hole and is threadedly connected to the lens connection hole; or A cylindrical lens connection hole is provided in the front shell, and one end of the lens module is passed through the lens connection hole and is threadedly connected to the lens connection hole.

3. The focus-adjustable lens according to claim 2, wherein: The transmission mechanism is a connecting rod transmission mechanism; the connecting rod transmission mechanism includes a sliding part and an elastic part; wherein the focusing wheel includes a cylinder with two ends passing through, the inner wall of the cylinder is provided with a constraint groove, the outer wall of the lens module is provided with a sliding cylinder, the elastic part is arranged in the sliding cylinder, the sliding part is a rod-shaped structure, and the first end of the sliding part extends into the sliding cylinder and abuts against the elastic part, and the second end of the sliding part extends into the constraint groove.

4. The focus-adjustable lens according to claim 3, wherein: The restraining groove is a through groove structure with two ends penetrating through.

5. The focus-adjustable lens according to claim 3, wherein: The outer wall of the sliding member is provided with a disc-shaped structure, the outer diameter of the disc-shaped structure is larger than the inner diameter of the sliding cylinder; the first end of the sliding member is provided with an accommodating cavity, and the elastic member is embedded in the accommodating cavity.

6. The focus-adjustable lens according to claim 1, wherein: The transmission mechanism is a gear transmission mechanism, and the focusing wheel includes a cylinder with two ends passing through; the gear transmission mechanism includes: Internal teeth provided on the inner wall of the cylinder; External teeth provided on the outer wall of the lens module; A transition gear connected to the lens housing, the transition gear is meshed with the inner teeth and the outer teeth respectively.

7. The focus-adjustable lens according to claim 3, wherein: The rear housing includes a lens holder, the lens connection hole is arranged on the lens holder, a stopper is arranged on the lens holder, a limiting groove is arranged on the outer wall of the lens module along the circumferential direction, and one end of the stopper extends into the limiting groove; Wherein, the limiting groove is an annular groove arranged on the outer wall of the lens module, the width of the annular groove in the direction of the central axis of the lens module is greater than the width of the stopper, and the stopper is fixedly connected to the lens holder, the lens module is rotated to a first angle relative to the lens holder, one side wall of the annular groove is limited by the stopper, and the lens module is rotated to a second angle relative to the lens holder, and the other side wall of the annular groove is limited by the stopper; or, The limiting groove is a spiral groove arranged on the outer wall of the lens module. In the direction of the central axis of the lens module, the stopper is slidably connected to the lens holder. When the lens module is rotated to a first angle relative to the lens holder, one end of the spiral groove is limited by the stopper. When the lens module is rotated to a second angle relative to the lens holder, the other end of the spiral groove is limited by the stopper.

8. The focus-adjustable lens according to claim 7, wherein: The limit range of the limit groove, the deformation amount of the elastic member, and the length of the sliding member satisfy a preset relationship, so that when the lens module is rotated to a first angle relative to the lens holder or when the lens module is rotated to a second angle relative to the lens holder, the second end of the sliding member always extends into the constraint groove.

9. The focus-adjustable lens according to claim 7, wherein: The rear housing further comprises a cover shell with two ends penetrating therethrough, the cover shell is sleeved on the lens holder and connected to the lens holder; A connecting arm is extended from one end of the cover shell, and an end of the connecting arm is connected to the front shell body; The focus wheel is disposed between the housing and the front housing and surrounds the connecting arm, wherein one end of the focus wheel is rotatably connected to the front housing and the other end of the focus wheel is rotatably connected to the housing; The viewing window includes a first viewing window disposed on the front housing, and the light inlet of the lens module corresponds to the first viewing window.

10. The focus-adjustable lens according to claim 9, wherein: The functional module is arranged in a space defined by the focusing wheel, the rear housing and the front housing, wherein the functional module includes a laser ranging module and / or a fill light module; The window also includes a second window and / or a third window arranged on the front shell, wherein the ranging port of the laser ranging module corresponds to the second window, and the light outlet of the fill light module corresponds to the third window.

11. An imaging device, characterized in that: include: A focusable lens and an imaging plate; the imaging plate is provided with an image sensor; the imaging plate is connected to the focusable lens; Wherein, the focus-adjustable lens is the focus-adjustable lens according to any one of claims 1 to 10, and the relative positions of the imaging plate and the lens housing are fixed.

Images