Variable-focus lens and imaging device

Abstract

Disclosed in the present application are a variable-focus lens and an imaging device. The variable-focus lens comprises: a lens housing, a focusing wheel, a lens module, a functional module and a transmission mechanism. The lens housing is provided with viewing windows; 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 accommodation chamber, the accommodation chamber being at least partially formed by the lens housing; a light incident side surface of the lens module faces the viewing windows, and the lens module is movably connected to the lens housing; the central axis of the lens module deviates from the central axis of the lens housing, and 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 accommodation chamber and is arranged in parallel with the lens module; and the functional module faces the viewing windows so as to emit or receive light rays via the viewing windows. The transmission mechanism is in transmission connection with the focusing wheel and the lens module, and is used for converting force generated by the rotation of the focusing wheel about the rotation axis of the focusing wheel into force that causes the lens module to move along the central axis of the lens module.

Description

Adjustable focus lens and imaging device TECHNICAL FIELD

[0001] The present application relates to the technical field of lens imaging, in particular to an adjustable focus lens and an imaging device. BACKGROUND

[0002] 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 light supplement lamp module, etc. SUMMARY

[0003] Therefore, the present application provides an adjustable focus lens and an imaging device to improve the integration capability of the functional modules of the lens.

[0004] In a first aspect, an embodiment of the present application provides an adjustable focus lens, comprising: a lens housing, the lens housing being provided with a window; a focus wheel, the focus wheel being sleeved at least at one end of the lens housing, and the focus wheel being rotationally connected with the lens housing; a lens module, the lens module being arranged in a receiving cavity, the receiving cavity being at least partially formed by the lens housing, a light-in side of the lens module facing the window, and the lens module being movably connected with the lens housing, wherein a central axis of the lens module deviates from a central axis of the lens housing; a rotation axis of the focus wheel deviates from the central axis of the lens module; a functional module, the functional module being at least partially arranged in the receiving cavity and being arranged in parallel with the lens module, the functional module facing the window to emit or receive light through the window; a transmission mechanism, the transmission mechanism being transmissionally connected with the focus wheel and the lens module, and being configured to convert a force caused by rotation of the focus wheel around the rotation axis of the focus wheel into a force for moving the lens module along the central axis of the lens module.

[0005] In an embodiment, the lens housing comprises a rear housing and a front housing; the rear housing is provided with a lens connecting hole in a cylindrical structure, one end of the lens module is sleeved in the lens connecting hole and is threadedly connected with the lens connecting hole; or the front housing is provided with a lens connecting hole in a cylindrical structure, one end of the lens module is sleeved in the lens connecting hole and is threadedly connected with the lens connecting hole.

[0006] In an embodiment, the transmission mechanism is a connecting rod transmission mechanism; the connecting rod transmission mechanism comprises a sliding piece and an elastic piece; wherein the focus wheel comprises a through barrel, an inner wall of the barrel is provided with a constraint groove, an outer wall of the lens module is provided with a sliding barrel, the elastic piece is arranged in the sliding barrel, the sliding piece is in a rod structure, a first end of the sliding piece extends into the sliding barrel and abuts against the elastic piece, and a second end of the sliding piece extends into the constraint groove.

[0007] In an embodiment, the constraint groove is a through groove structure.

[0008] In a specific embodiment, the outer wall of the second end of the sliding member is provided with a disc structure, the outer diameter of the disc structure is greater 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 an embodiment, the transmission mechanism is a gear transmission mechanism, the focusing wheel comprises a through cylinder, the gear transmission mechanism comprises: an inner gear provided on the inner wall of the cylinder; an outer gear provided on the outer wall of the lens module; and a transition gear connected to the lens shell, the transition gear is engaged with the inner gear and the outer gear respectively.

[0010] In an embodiment, the rear shell comprises a lens support, the lens connecting hole is arranged on the lens support, the lens support is provided with a stopper, the outer wall of the lens module is provided with a limiting groove in 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, the stopper is fixedly connected to the lens support, the lens module is rotated relative to the lens support to a first angle, one side wall of the annular groove is limited by the stopper, the lens module is rotated relative to the lens support to a second angle, and the other side wall of the annular groove is limited by the stopper; or,

[0011] the limiting groove is a spiral groove arranged on the outer wall of the lens module, the stopper is slidingly connected to the lens support in the direction of the central axis of the lens module, the lens module is rotated relative to the lens support to a first angle, one end of the spiral groove is limited by the stopper, the lens module is rotated relative to the lens support to a second angle, and the other end of the spiral groove is limited by the stopper.

[0012] In an embodiment, the range of the limiting groove, the deformation amount of the elastic member, and the length of the sliding member satisfy a predetermined relationship, so that the second end of the sliding member always extends into the constraint groove during the process that the lens module is rotated relative to the lens support to a first angle or the process that the lens module is rotated relative to the lens support to a second angle.

[0013] In an embodiment, the rear shell further comprises a cover through which both ends pass, the cover is sleeved on the lens holder and connected with the lens holder; one end of the cover extends to form a connecting arm, the end of the connecting arm is connected with the front shell; the focusing wheel is arranged between the cover and the front shell and surrounds the connecting arm, wherein one end of the focusing wheel is rotationally connected with the front shell and the other end of the focusing wheel is rotationally connected with the cover; the view window comprises a first view window arranged on the front shell, and the light inlet of the lens module corresponds to the first view window.

[0014] In an embodiment, the functional module is arranged in a space defined by the focusing wheel, the rear shell and the front shell, wherein the functional module comprises a laser ranging module and / or a light supplement lamp module; the view window further comprises a second view window and / or a third view window arranged on the front shell, wherein the ranging port of the laser ranging module corresponds to the second view window and the light outlet port of the light supplement lamp module corresponds to the third view window.

[0015] In a second aspect, the embodiments of the present application further provide an imaging device, comprising: a focus-adjustable lens and an imaging plate; the imaging plate is provided with an image sensor; the imaging plate is connected with the focus-adjustable lens; wherein the focus-adjustable lens is any of the focus-adjustable lenses described in the embodiments of the present application, and the relative position of the imaging plate and the lens shell is fixed.

[0016] The focus-adjustable lens and the imaging device provided by the embodiments of the present application comprise: a lens shell, a focusing wheel, a lens module, a functional module and a transmission mechanism; the lens shell is provided with a view window; the focusing wheel is sleeved on the lens shell at least at one end, and the focusing wheel is rotationally connected with the lens shell; the lens module is arranged in a receiving cavity, the receiving cavity is at least partially formed by the lens shell, the light inlet side of the lens module faces the view window, and the lens module is movably connected with the lens shell, wherein the central axis of the lens module deviates from the central axis of the lens shell; 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 receiving cavity and arranged in parallel with the lens module, the functional module faces the view window to emit or receive light through the view window; the transmission mechanism transmissionally connects the focusing wheel and the lens module, and is used for converting the force caused by the rotation of the focusing wheel around the rotation axis of the focusing wheel into the force for moving the lens module along the central axis of the lens module. The focusing wheel of the present application is arranged in an eccentric manner relative to the lens module to realize the focusing function, which facilitates the configuration of more compact space inside the focus-adjustable lens according to the structure and shape of the focus-adjustable lens, so as to arrange the corresponding functional module, thereby increasing the effective utilization space inside the focus-adjustable lens and improving the integration capability of the functional module. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0018] Fig. 1 is a schematic diagram of a zoom lens provided with a connecting rod transmission mechanism according to an embodiment of the present application;

[0019] Fig. 2 is a schematic diagram of an axial cross section of a zoom lens provided with a connecting rod transmission mechanism according to an embodiment of the present application;

[0020] Fig. 3 is a schematic diagram of a cross section of a zoom lens provided with a connecting rod transmission mechanism according to an embodiment of the present application;

[0021] Fig. 4 is a schematic diagram of a focusing wheel constraint groove of a zoom lens provided with a connecting rod transmission mechanism according to an embodiment of the present application;

[0022] Fig. 5 is a schematic diagram of a zoom lens provided with a tooth transmission mechanism according to an embodiment of the present application;

[0023] Fig. 6 is a schematic diagram of a cross section of a zoom lens provided with a tooth transmission mechanism according to an embodiment of the present application;

[0024] Fig. 7 is a schematic diagram of inner teeth of a focusing wheel of a zoom lens provided with a tooth transmission mechanism according to an embodiment of the present application;

[0025] Fig. 8 is a schematic diagram of an axial cross section of a zoom lens provided with a tooth transmission mechanism according to an embodiment of the present application.

[0026] Legend of reference signs: 100 - zoom lens; 10 - lens support; 11 - lens connecting hole; 12 - stop; 13 - wall hole; 14 - gear seat; 15 - gear shaft; 20 - lens module; 21 - sliding cylinder; 22 - external teeth; 23 - limiting groove; 30 - focusing wheel; 31 - constraint groove; 32 - inner teeth; 41 - sliding member; 42 - elastic member; 43 - transition gear; 50 - cover; 51 - connecting arm; 60 - front housing; 61 - first window; 62 - second window; 63 - third window; 70 - laser ranging module; 80 - light supplement lamp module; 200 - imaging plate. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0028] It should be understood that the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0029] In the related art, the lens of the imaging device often has multiple functional modules, such as an imaging module that needs to be focused, a laser ranging module, a light supplement lamp module, etc. The separate arrangement of each functional module causes the lens to have a large size and an irregular appearance, and makes the focusing operation of the imaging module inconvenient. In order to optimize the internal space structure of the focus-adjustable lens and improve the integration capability of the functional modules, in a first aspect, as shown in FIG. 1, an embodiment of the present application provides a focus-adjustable lens 100, which can include a lens housing, a focusing wheel 30, a lens module 20, a functional module, and a transmission mechanism.

[0030] The lens housing is provided with a window, the focusing wheel 30 is sleeved at least at one end of the lens housing, and the focusing wheel 30 is rotationally connected with the lens housing. The shape of the focusing wheel 30 can be adaptively configured according to the product structure. For example, when the focusing distance is small, the focusing wheel 30 can achieve the focusing distance when it is rotated by a small angle. Therefore, the focusing wheel 30 can be designed as a semicircle or an arc. In order to improve the structural compactness, the focusing wheel 30 can also be designed as a component of the protective structure of the focus-adjustable lens 100, and cooperates with other components such as the lens housing to form an enclosed space, which protects the components in the enclosed space. Thus, the focusing wheel 30 itself constitutes part of the protective structure of the focus-adjustable lens 100 on the premise of realizing the focusing function, so as to fully utilize the structural function of the focusing wheel 30.

[0031] The lens module 20 is arranged in the accommodating cavity, which is at least partially formed by the lens housing. The light-in side of the lens module 20 faces the window, and the lens module 20 is movably connected with the lens housing. The central axis of the lens module 20 deviates from the central axis of the lens housing. The rotation axis of the focusing 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 focusing wheel 30, etc. Thus, the accommodating cavity provides a space for accommodating and protecting the lens module 20, etc. The lens module 20 can be sleeved in the lens housing and connected with the lens housing, so that the lens housing supports the lens module 20. The lens module 20 can be a columnar housing structure, and lenses for imaging can be arranged in the columnar housing structure. The lenses are arranged along the imaging optical axis of the lens module 20. The functional module is at least partially arranged in the accommodating cavity and parallel to the lens module 20. The functional module faces the window to emit or receive light through the window. The functional module can be a component with a specific function, or can be an auxiliary component of the lens module 20.

[0032] In the embodiment, as shown in FIG. 2 and FIG. 3, the central axis of the lens module 20 deviates from the central axis of the lens housing, and the rotation axis of the focusing wheel 30 deviates from the central axis of the lens module 20, which is beneficial to optimize the structural space inside the adjustable focus lens 100. For example, the outer diameter of the lens module 20 is 40 mm, and the inner diameter of the focusing wheel 30 is 60 mm. If the rotation axis of the focusing wheel 30 is coaxially arranged relative 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 focusing wheel 30 is eccentrically arranged relative 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 of the embodiment, in which the rotation axis of the focusing wheel 30 deviates from the central axis of the lens module 20, can optimize the structural space inside the adjustable focus lens 100 and improve the accommodable capacity of the adjustable focus lens 100 to functional modules and the space utilization rate.

[0033] In the embodiment, the transmission mechanism drives the focusing wheel 30 and the lens module 20 to be connected, which is used to convert the force caused by the rotation of the focusing wheel 30 around the rotation axis of the focusing wheel 30 into the force that makes the lens module 20 move along the central axis of the lens module 20. The focusing wheel 30 is drivingly connected with the lens module 20, and when the focusing wheel 30 rotates, the lens module 20 is driven to move along the central axis of the lens module 20 relative to the lens housing. When the imaging device is configured with the adjustable focus lens 100, the relative position between the imaging plate 200 of the imaging device and the lens housing is fixed. As shown in FIG. 2, by moving the lens module 20 along the central axis of the lens module 20 relative to the lens housing, the distance between the lens module 20 and the imaging plate 200 in the direction 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 the imaging optical axis of the lens module 20, and the distance between the lens module 20 and the imaging plate 200 is adjusted along the central axis of the lens module 20, that is, along the imaging optical axis.

[0034] The embodiment of the present application provides the adjustable focus lens 100, which comprises a lens shell, a focusing wheel 30, a lens module 20, a functional module and a transmission mechanism. The lens shell is provided with a window. The focusing wheel 30 is sleeved at least at one end of the lens shell, and the focusing wheel 30 is rotationally connected with the lens shell. The lens module 20 is arranged in a containing cavity, and the containing cavity is at least partially formed by the lens shell. The light-in side of the lens module 20 faces the window, and the lens module 20 is movably connected with the lens shell. The central axis of the lens module 20 deviates from the central axis of the lens shell. The rotation axis of the focusing wheel 30 deviates from the central axis of the lens module 20. The functional module is at least partially arranged in the containing cavity and is arranged in parallel with the lens module 20. The functional module faces the window to emit or receive light through the window. The transmission mechanism transmissionally connects the focusing wheel 30 and the lens module 20, and is used for converting the force caused by the rotation of the focusing wheel 30 around the rotation axis of the focusing wheel 30 into the force for moving the lens module 20 along the central axis of the lens module 20. The focusing wheel 30 of the present application is arranged in a manner of eccentricity relative to the lens module 20 to realize the focusing function. The structure shape of the adjustable focus lens 100 is convenient for arranging more compact space inside the adjustable focus lens 100 to arrange the corresponding functional module, thereby increasing the effective utilization space inside the adjustable focus lens 100 and improving the integration capacity of the functional module.

[0035] Optionally, in an embodiment of the present application, the lens shell comprises a rear shell and a front shell 60. The lens shell is provided with a cylindrical lens connecting hole 11. One end of the lens module 20 is arranged in the lens connecting hole 11 and is threadedly connected with the lens connecting hole 11. According to the structure layout of the adjustable focus lens 100, the lens connecting hole 11 is arranged in the rear shell or the front shell 60, and one end of the lens module 20 is threadedly connected with the lens connecting hole 11. In this way, by rotating the lens module 20, the relative position of the lens module 20 and the lens shell can be adjusted along the central axis of the lens module 20 under the thread connection of the lens module 20 and the lens connecting hole 11, so as to change the distance between the lens module 20 and the imaging plate 200, thereby realizing the focusing function of the lens module 20.

[0036] The transmission mechanism between the barrel of the focusing wheel 30 and the lens module 20 can be various. Optionally, in an embodiment of the present application, the transmission mechanism is a connecting rod transmission mechanism. The connecting rod transmission mechanism comprises a sliding piece 41 and an elastic piece 42. The focusing wheel 30 comprises a barrel penetrating through both ends. 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 sliding barrel 21. The elastic piece 42 is arranged in the sliding barrel 21. The sliding piece 41 is in a rod structure. The first end of the sliding piece 41 extends into the sliding barrel 21 and abuts against the elastic piece 42. The second end of the sliding piece 41 extends into the constraint groove 31.

[0037] For the structure configuration, the rotation axis of the focusing wheel 30 is fixed relative to the position of the rotation center of the lens module 20, which can be equivalent to a frame, the rotation connection position of the focusing wheel 30 and the sliding piece 41 relative to the rotation axis of the focusing wheel 30 can be equivalent to a crank, the sliding connection position of the lens module 20 and the sliding piece 41 relative to the rotation center of the lens module 20 can be equivalent to a guide rod, and the sliding piece 41 is rotationally connected to the focusing wheel 30 and slidingly connected to the lens module 20, which can be equivalent to a slider. When the lens module 20 is configured to rotate circumferentially 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 rotation of the rotary guide rod mechanism, for example, when the focusing wheel 30 is rotated by an angle of 90° from the position shown in FIG. 3, because the central axis of the lens module 20 is eccentrically arranged above the rotation axis of the focusing wheel 30, the rotation angle of the lens module 20 is greater than 90°, a relative angle change is generated between the sliding piece 41 and the focusing wheel 30, that is, the sliding piece 41 rotates relative to the focusing wheel 30. In addition, when the lens module 20 moves along the central axis of the lens module 20, the sliding piece 41 moves along the constraint groove 31 of the focusing wheel 30, so in this embodiment, the second end of the sliding piece 41 extends into the constraint groove 31 of the inner wall of the focusing wheel 30, so that the sliding piece 41 can rotate and slide relative to the focusing wheel 30. In addition, the sliding piece 41 slides relative to the sliding cylinder 21 of the outer wall of the lens module 20 under the action of the elastic piece 42, so in this embodiment, the first end of the sliding piece 41 extends into the sliding cylinder 21 of the outer wall of the lens module 20, so that the sliding piece 41 can slide relative to the lens module 20, thereby meeting the relative motion requirement. Similarly, the sliding piece 41 can also be configured to rotate and slide relative to the lens module 20, and the sliding piece 41 can slide relative to the cylinder of the focusing wheel 30, and the rotary guide rod mechanism can also be realized, so that the lens module 20 is driven to rotate relative to the lens housing when the focusing wheel 30 rotates. This embodiment does not limit this.

[0038] When the connecting rod transmission mechanism is configured such 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 various ways for the sliding member 41 to slide relative to the lens module 20, for example, the sliding member 41 can be a rod-shaped structure, a sliding barrel 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 barrel 21 or the sliding hole, and the sliding member 41 slides relative to the sliding barrel 21 or the sliding hole, thereby achieving the sliding connection between the sliding member 41 and the lens module 20; there are also various ways for the sliding member 41 to rotate 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 arranged in the rotating hole, and the rotating hole with a complete circumferential structure can radially constrain the rotating shaft, so that the rotating shaft does not come off the rotating hole, thereby achieving the rotating connection between the sliding member 41 and the barrel; further, a missing-wall rotating hole with a structure larger than half a circumferential structure can be provided on the inner wall of the barrel, the missing-wall rotating hole is also a groove structure, and a rotating shaft is provided at the end of the sliding member 41, the rotating shaft is arranged in the missing-wall rotating hole, and since the missing-wall rotating hole has a structure larger than half a circumferential structure, the rotating shaft can still be radially constrained, so that the rotating shaft does not come off the missing-wall rotating hole, thereby achieving the rotating connection between the sliding member 41 and the barrel. In some embodiments, a missing-wall rotating hole with a structure smaller than half a circumferential structure is provided on the inner wall of the barrel of the focusing wheel 30, but the missing-wall rotating hole with a structure smaller than half a circumferential structure cannot completely radially constrain the rotating shaft, and the rotating shaft is easy to come off the missing-wall structure of the missing-wall rotating hole. Therefore, in order to reduce the structural complexity and processing difficulty, as shown in FIGS. 2 and 3, in the present embodiment, the connecting rod transmission mechanism further comprises an elastic member 42 arranged in the sliding barrel 21, and the elastic member 42 can be a cylindrical spring, etc. In this way, the constraint groove 31 can be designed as a trapezoidal groove or a circular arc groove, the circular arc of the circular arc groove can be a minor arc smaller than half a circumferential arc, the size of the groove opening of the trapezoidal groove or the circular arc groove can be larger than the size of the groove bottom, and the space size of the constraint groove 31 can be larger than the entity size of the second end of the sliding member 41, so that after the second end of the sliding member 41 extends into the constraint groove 31, the second end of the sliding member 41 can rotate relative to the focusing wheel 30 and slide relative to the constraint groove 31 of the focusing wheel 30. The first end of the sliding member 41 extends into the sliding barrel 21 and abuts against the elastic member 42, and under the action of the elastic force, the second end of the sliding member 41 can always extend into the constraint groove 31 of the inner wall of the barrel of the focusing wheel 30, so that when the second end of the sliding member 41 rotates relative to the barrel of the focusing wheel 30, the second end of the sliding member 41 is always constrained in the constraint groove 31 of the inner wall of the barrel, thereby enabling the sliding member 41 to rotate relative to the focusing wheel 30 and slide relative to the constraint groove 31 of the focusing wheel 30. Optionally, in an embodiment of the present application, the constraint groove 31 is a through groove structure with both ends penetrating through.As shown in FIG. 4, the constraint groove 31 is formed in the inner wall of the barrel of the focusing wheel 30, and the constraint groove 31 is a through groove structure. The constraint groove 31 can facilitate the machining of the cutter and reduce the machining difficulty. In addition, when the first end of the sliding member 41 is installed in the sliding barrel 21 of the lens module 20, the second end of the sliding member 41 can be inserted into the constraint groove 31 from one end of the constraint groove 31, and the focusing wheel 30 can be smoothly installed on the radial outer side of the lens module 20, thereby further improving the convenience of installation.

[0039] Optionally, in an embodiment of the present application, the outer wall of the second end of the sliding member 41 is provided with a disc structure, and the outer diameter of the disc structure is greater than the inner diameter of the sliding barrel 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 first end of the sliding member 41 is provided with the receiving cavity, which 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 in the sliding barrel 21. The disc structure of the outer wall of the sliding member 41 has an outer diameter greater than the inner diameter of the sliding barrel 21, which can provide an installation limiting foolproof function when the sliding member 41 is assembled with the sliding barrel 21, and can avoid the excessive compression of the elastic member 42 caused by the excessive insertion of the sliding member 41 into the sliding barrel 21, so that the elastic member 42 is in a safe use state, and the service life of the elastic member 42 is ensured.

[0040] The transmission mechanism between the barrel of the focusing wheel and the lens module can also adopt gear transmission, for example, the inner teeth can be arranged on the inner wall of the barrel of the focusing wheel, the outer teeth are arranged on the outer wall of the lens module, and the transmission connection between the focusing wheel and the lens module is realized through the meshing transmission of the inner teeth and the outer teeth. However, since the radial dimensions of the multiple lenses in the lens module can be different, the lens module is a variable-diameter structure in the direction along the imaging optical axis. In order to directly mesh with the inner teeth on the inner wall of the barrel of the focusing wheel, the outer teeth need to be designed to have a larger outer diameter, which will affect the internal structure space and compactness of the adjustable focus lens. To solve this problem, as shown in FIG. 5, in an embodiment of the present application, the transmission mechanism is a gear transmission mechanism, the focusing wheel 30 includes a barrel penetrating through both ends, the gear transmission mechanism includes: inner teeth 32 arranged on the inner wall of the barrel; outer teeth 22 arranged on the outer wall of the lens module 20; a transition gear 43 connected to the lens housing, the transition gear 43 is meshed with the inner teeth 32 and the outer teeth 22, respectively. As shown in FIG. 6, it can be understood that, since the transition gear 43 is arranged, 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 barrel of the focusing wheel 30, so that the outer diameter of the outer teeth 22 can be smaller, thereby further optimizing the internal structure space of the adjustable focus lens 100. Since the focusing distance of the adjustable focus lens 100, the pitch of the connecting threads of the lens module 20 and the lens connecting hole 11 can all be different, the focusing wheel 30 can rotate multiple turns to reach the focusing distance, or can rotate not more than one turn to reach the focusing distance. Therefore, as shown in FIG. 7, the inner teeth 32 can be arranged on the entire circumference of the inner wall of the barrel of the focusing wheel 30, or can be arranged on a partial circumference of the inner wall of the barrel of the focusing wheel 30. Similarly, the outer teeth 22 can be arranged on the entire circumference of the outer wall of the lens module 20, or can be arranged on a partial circumference of the outer wall of the lens module 20. The gear seat 14 can be arranged on the lens housing, the gear shaft 15 is arranged through the gear seat 14, and the transition gear 43 can be sleeved on the gear shaft 15 and axially positioned by a snap spring or the like.

[0041] The adjustable focus lens 100 often has a limited focus distance, and the movement of the lens module 20 needs to be limited when the limit of the focus distance is reached. Therefore, as shown in FIGS. 5 and 8, in an embodiment of the present application, the rear shell includes a lens holder 10, the lens connecting hole 11 is arranged on the lens holder 10, the lens holder 10 is provided with a stopper 12, a limiting groove 23 is formed in the outer wall of the lens module 20 in the circumferential direction, and one end of the stopper 12 extends into the limiting groove 23. The limiting groove 23 is a ring-shaped groove arranged on the outer wall of the lens module 20, the width of the ring-shaped groove in the direction of the central axis of the lens module 20 is greater than the width of the stopper 12, 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, one side wall of the ring-shaped groove is limited by the stopper 12, the lens module 20 is rotated to a second angle relative to the lens holder 10, and the other side wall of the ring-shaped groove is limited by the stopper 12. It can be understood that by limiting the first angle of the clockwise rotation or the second angle of the counterclockwise rotation of the lens module 20 relative to the lens holder 10, the phenomenon of the lens module 20 being locked due to the damage of the mating threads between the lens module 20 and the lens connecting hole 11 caused by excessive rotation of the focus wheel 30 beyond the threaded cooperation range of the lens module 20 and the lens connecting hole 11 can be avoided. Optionally, in an embodiment of the present application, the lens connecting hole 11 on the lens holder 10 is a cylindrical structure, the first end of the lens module 20 is arranged in the cylindrical structure and is threadedly connected with the cylindrical structure; the limiting groove 23 is arranged on the first end of the lens module 20, the cylindrical structure is provided with a wall hole 13 at a position corresponding to the limiting groove 23, and the stopper 12 is arranged in the wall hole 13 and connected with the cylindrical structure.

[0042] Alternatively, another limiting structure is given in other embodiments, the limiting groove 23 is a spiral groove arranged on the outer wall of the lens module 20, the stopper 12 is slidingly connected to the lens holder 10 in the direction of the central axis of the lens module 20, one end of the spiral groove is limited by the stopper 12 when the lens module 20 is rotated to a first angle relative to the lens holder 10, the other end of the spiral groove is limited by the stopper 12 when the lens module 20 is rotated to a second angle relative to the lens holder 10. 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 configure the two ends of the spiral structure of the spiral groove with the stopper 12 as a stop structure for the limit of the focus distance, and the movement of the lens module 20 in the direction of the central axis of the lens module 20 can also be limited.

[0043] In order to ensure that the sliding member 41 and the focusing wheel 30, the lens module 20 maintain the expected movement relationship at all times when the lens module 20 is focused within the range, optionally, in an embodiment of the present application, the range of the limiting groove 23, the deformation amount of the elastic member 42, and the length of the sliding member 41 satisfy a predetermined relationship, so that the second end of the sliding member 41 always extends into the constraint groove 31 during the process of rotating the lens module 20 relative to the lens holder 10 to the first angle or rotating the lens module 20 relative to the lens holder 10 to the second angle. In this way, during the process of rotating the focusing wheel 30 to drive the lens module 20 to focus within the focusing range, the second end of the sliding member 41 can always be constrained by the constraint groove 31, so as to ensure that the sliding member 41 can rotate and slide relative to the focusing wheel 30, and the sliding member 41 can slide relative to the lens module 20.

[0044] Optionally, in an embodiment of the present application, as shown in FIG. 1 and FIG. 5, the rear shell further includes a cover 50 extending through both ends, the cover 50 is sleeved on the lens holder 10 and connected with the lens holder 10; one end of the cover 50 extends to form a connecting arm 51, the end of the connecting arm 51 is connected with the front shell 60; the focusing wheel 30 is arranged between the cover 50 and the front shell 60 and surrounds the connecting arm 51, wherein one end of the focusing wheel 30 is rotatably connected with the front shell 60, and the other end of the focusing wheel 30 is rotatably connected with the cover 50; the window includes a first window 61 arranged on the front shell 60, and the light inlet of the lens module 20 corresponds to the first window 61. In this embodiment, the focusing wheel 30 is located between the cover 50 and the front shell 60, and the two ends of the focusing wheel 30 are rotatably connected with the cover 50 and the front shell 60 respectively, for example, the two ends of the focusing wheel 30 can be sleeved on the cover 50 and the front shell 60 respectively. Compared with the structure that the focusing wheel 30 is designed at the end of the focus-adjustable lens 100, the cover 50 and the front shell 60 of the present application can form a more stable and reliable rotating support for the focusing wheel 30. In addition, the cover 50, the front shell 60, and the focusing 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, thereby further making full use of the structural function of the focusing wheel 30. The outer contours of the cover 50, the front shell 60, and the focusing wheel 30 can be flush or smoothly transitioned, so that the appearance of the focus-adjustable lens 100 is regular and the structure is compact. The connecting arm 51 extending axially at one end of the cover 50 can be one or multiple, and multiple connecting arms can form a more stable connection with the front shell 60. For example, multiple connecting arms 51 can be formed axially at the circumference of one end of the cover 50, and the multiple connecting arms can be distributed on a part of the circumference of the one end of the cover 50, so as to further optimize the structural space.

[0045] As mentioned above, the focusing wheel 30 of the present application realizes the focusing function in a manner of being arranged eccentrically relative to the lens module 20, so that a more compact space can be formed inside the adjustable focus lens 100, the available space is increased, more structural components can be arranged, and the integration capability of the functional module is improved. Therefore, in an embodiment of the present application, as shown in FIG. 1 and FIG. 5, the functional module is arranged in the space defined by the focusing wheel 30, the rear shell and the front shell 60, wherein the functional module includes a laser ranging module 70 and / or a fill light module 80; the window further includes a second window 62 and / or a third window 63 arranged on the front shell 60, wherein the ranging port of the laser ranging 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, by optimizing the structural space inside the adjustable focus lens 100, the embodiment improves the accommodation capability of the adjustable focus lens 100 for the functional module and the space utilization, so that the adjustable focus lens 100 can be further configured with the functional module such as the laser ranging module 70 and the fill light module 80.

[0046] In a second aspect, the embodiments of the present application further provide an imaging device capable of improving the integration capability of the lens functional module.

[0047] The imaging device provided by the embodiments of the present application can include: an adjustable focus lens 100 and an imaging plate 200; the imaging plate 200 is provided with an image sensor; the imaging plate 200 is connected with the adjustable focus lens 100; wherein the adjustable focus lens 100 is any one of the adjustable focus lenses 100 described in the embodiments of the present application, and the relative position between the imaging plate 200 and the lens shell is fixed. Since the relative position between the imaging plate 200 and the lens shell is fixed, the focusing distance required by the imaging requirement can be achieved by rotating the focusing wheel 30 by a preset angle to drive the lens module 20 to move a preset distance along the central axis of the lens module 20 relative to the imaging plate 200.

[0048] Therefore, the imaging device provided by the embodiment of the present application is configured with the focus-adjustable lens 100, which comprises a lens shell, a focus-adjusting wheel 30, a lens module 20, a functional module, and a transmission mechanism. The lens shell is provided with a window. The focus-adjusting wheel 30 is sleeved at least at one end of the lens shell, and the focus-adjusting wheel 30 is rotationally connected with the lens shell. The lens module 20 is arranged in a receiving cavity, and the receiving cavity is formed at least partially by the lens shell. The light-in side of the lens module 20 faces the window, and the lens module 20 is movably connected with the lens shell. The central axis of the lens module 20 deviates from the central axis of the lens shell. The rotation axis of the focus-adjusting wheel 30 deviates from the central axis of the lens module 20. The functional module is arranged at least partially in the receiving cavity and in parallel with the lens module 20. The functional module faces the window to emit or receive light through the window. The transmission mechanism drives the focus-adjusting wheel 30 and the lens module 20 to be connected, so as to convert the force caused by the rotation of the focus-adjusting wheel 30 around the rotation axis of the focus-adjusting wheel 30 into the force for moving the lens module 20 along the central axis of the lens module 20. The focus-adjusting wheel 30 of the present application is arranged eccentrically relative to the lens module 20 to realize the focus-adjusting function. According to the structure and shape of the focus-adjustable lens 100, a more compact space can be arranged inside the focus-adjustable lens 100 to arrange the corresponding functional module, so as to increase the effective utilization space inside the focus-adjustable lens 100 and improve the integration capability of the functional module.

[0049] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0050] Each of the embodiments in the present specification is described in a relevant manner, and the same and similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments.

[0051] Especially, 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 part of the method embodiment.

[0052] For ease of description, the above apparatus is described in functional various units / modules respectively. Of course, in the implementation of the present application, the functions of each unit / module can be implemented in the same or more software and / or hardware.

[0053] The above description is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any changes or replacements easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An adjustable focus lens (100), comprising: a lens housing, the lens housing being provided with a window; a focus wheel (30), the focus wheel (30) being sleeved at least one end of the lens housing, and the focus wheel (30) being rotationally connected with the lens housing; a lens module (20), the lens module (20) being arranged in a receiving cavity, the receiving cavity being formed at least partially by the lens housing, a light-in side of the lens module (20) facing the window, and the lens module (20) being movably connected with the lens housing, wherein a central axis of the lens module (20) is offset from a central axis of the lens housing; a rotation axis of the focus wheel (30) is offset from the central axis of the lens module (20); a functional module, the functional module being arranged at least partially in the receiving cavity and being arranged in parallel with the lens module (20), the functional module facing the window to emit or receive light through the window; a transmission mechanism, the transmission mechanism drivingly connecting the focus wheel (30) and the lens module (20) to convert a force caused by rotation of the focus wheel (30) around the rotation axis of the focus wheel (30) into a force for moving the lens module (20) along the central axis of the lens module (20).

2. The zoom lens according to claim 1, wherein The lens housing comprises a rear housing and a front housing (60); the rear housing is provided with a lens connecting hole (11) in a cylindrical structure, one end of the lens module (20) is arranged in the lens connecting hole and is threadedly connected with the lens connecting hole; or the front housing is provided with a lens connecting hole (11) in a cylindrical structure, one end of the lens module (20) is arranged in the lens connecting hole and is threadedly connected with the lens connecting hole.

3. The zoom lens according to claim 2, wherein The transmission mechanism is a connecting rod transmission mechanism; the connecting rod transmission mechanism comprises a sliding member (41) and an elastic member (42); wherein the focus wheel (30) comprises a barrel with two ends penetrating through, an inner wall of the barrel is provided with a constraint groove (31), an outer wall of the lens module (20) is provided with a sliding barrel (21), the elastic member (42) is arranged in the sliding barrel (21), the sliding member (41) is in a rod structure, a first end of the sliding member (42) extends into the sliding barrel (21) and abuts against the elastic member (42), and a second end of the sliding member (42) extends into the constraint groove (31).

4. The zoom lens according to claim 3, wherein The constraint groove (31) is a through groove structure with two ends penetrating through.

5. The zoom lens according to claim 3 or 4, characterized by An outer wall of the second end of the sliding member (41) is provided with a disc structure, an outer diameter of the disc structure is greater than an inner diameter of the sliding barrel (21); a first end of the sliding member (41) is provided with a receiving cavity, and the elastic member (42) is embedded in the receiving cavity.

6. The zoom lens according to claim 1, wherein The transmission mechanism is a gear transmission mechanism, the focus wheel comprises a barrel with two ends penetrating through; the gear transmission mechanism comprises: an inner gear (32) arranged on an inner wall of the barrel; an outer gear (22) arranged on an outer wall of the lens module; a transition gear (43) connected with the lens housing, the transition gear (43) being engaged with the inner gear (32) and the outer gear (22) respectively.

7. The zoom lens according to claim 3 or 6, characterized by The rear shell comprises a lens support (10), the lens connecting hole (11) is arranged on the lens support, a stopper (12) is arranged on the lens support (10), an outer wall of the lens module (20) is provided with a limiting groove (23) in the circumferential direction, and one end of the stopper (12) extends into the limiting groove (23); The limiting groove (23) is a ring groove arranged on the outer wall of the lens module (20), the width of the ring groove is greater than the width of the stopper (12) in the direction of the central axis of the lens module (20), the stopper (12) is fixedly connected to the lens support (10), the lens module (20) is rotated relative to the lens support (10) to a first angle, one side wall of the ring groove is limited by the stopper (12), the lens module (20) is rotated relative to the lens support (10) to a second angle, and the other side wall of the ring groove is limited by the stopper (12); or, The limiting groove (23) is a spiral groove arranged on the outer wall of the lens module (20), the stopper (12) is slidably connected to the lens support (10) in the direction of the central axis of the lens module (20), the lens module (20) is rotated relative to the lens support (10) to a first angle, one end of the spiral groove is limited by the stopper (12), the lens module is rotated relative to the lens support to a second angle, and the other end of the spiral groove is limited by the stopper (12).

8. The zoom lens according to claim 7, wherein The range of the limiting groove (23), the deformation amount of the elastic member (42) and the length of the sliding member (41) satisfy a preset relationship, so that the second end of the sliding member (42) always extends into the constraint groove (31) during the process that the lens module (20) is rotated relative to the lens support (10) to a first angle or the process that the lens module (20) is rotated relative to the lens support (10) to a second angle.

9. The zoom lens according to claim 7 or 8, characterized by The rear shell further comprises a cover (50) penetrating through two ends, the cover (50) is sleeved on the lens support (10) and connected with the lens support (10); One end of the cover (50) extends to form a connecting arm (51), and the end of the connecting arm (51) is connected with the front shell; The focusing wheel (30) is arranged between the cover (50) and the front shell (60) and surrounds the connecting arm (51), wherein one end of the focusing wheel (30) is rotatably connected with the front shell (60), and the other end of the focusing wheel (30) is rotatably connected with the cover (50); The window comprises a first window (61) arranged on the front shell (60), and the light inlet of the lens module (20) corresponds to the first window (61).

10. The zoom lens according to claim 9, wherein The functional module is arranged in a space defined by the focusing wheel (30), the rear shell and the front shell (60), wherein the functional module comprises a laser ranging module (70) and / or a light supplementing lamp module (80). The window further comprises a second window (62) and / or a third window (63) arranged on the front shell, wherein a ranging port of the laser ranging module (70) corresponds to the second window (62), and a light exit port of the light supplementing lamp module (80) corresponds to the third window (63).

11. An imaging device, characterized by Comprise: A zoom lens (100) and an imaging plate (200); the imaging plate (200) is provided with an image sensor; the imaging plate (200) is connected with the zoom lens (100); Wherein, the zoom lens (100) is the zoom lens of any one of claims 1-10, and the relative position of the imaging plate (200) and the lens shell is fixed.

Images