Focusing mechanism and handheld device

Abstract

The embodiment of the invention provides a focusing mechanism and handheld equipment. The focusing mechanism comprises a focusing shaft, a focusing knob, a switching knob, a driving mechanism and a transmission mechanism. The switching knob is rotated to a first position to drive the driving mechanism to be in transmission connection between the focusing knob and the first transmission mechanism, so that the focusing knob adjusts the position of the first lens or the first movement through the driving mechanism and the first transmission mechanism; and the switching knob is rotated to a second position to drive the driving mechanism to be in transmission connection between the focusing knob and the second transmission mechanism, so that the focusing knob adjusts the position of the second lens or the second movement through the driving mechanism and the second transmission mechanism. When the types of the two groups of lens assemblies are different or the focusing parameters are different, the two lenses or the two machine cores can be adjusted to proper positions through the process of independently adjusting the positions of the lenses or the machine cores, so that the two groups of lens assemblies can be clearly imaged, and the imaging effect of the handheld equipment is improved.

Description

Technical Field

[0001] The present application relates to the technical field of optical imaging equipment, and in particular to a focusing mechanism and a handheld device. Background Art

[0002] Existing handheld devices typically include two lens assemblies and a focusing wheel, which is used to adjust the focus lenses within both lens assemblies. During focusing, rotating the focusing wheel causes the focus lenses within both lens assemblies to move simultaneously along their optical axes, ensuring that both lenses always move the same distance.

[0003] If the two lens assemblies are of the same type and have the same focusing parameters, rotating a single focusing wheel can simultaneously adjust the focus of both lens assemblies, adjusting both focusing lenses to the appropriate position for clear imaging from both sets of lenses. However, if the two lens assemblies are of different types or have different focusing parameters, for example, one set is a visible light lens assembly and the other is an infrared lens assembly, rotating a single focusing wheel can only adjust one set of lenses to the appropriate position, resulting in clear imaging from one set of lenses while the other set of lenses cannot. If you want the other set of lenses to have a clear image, you need to rotate the focusing wheel again to adjust the focus for that set of lenses. This means that only one set of lenses can be clearly imaged at a time, resulting in poor imaging quality. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a focusing mechanism and a handheld device, which can adjust the position of each lens or movement individually through a focusing mechanism so that both groups of lens assemblies can produce clear images, thereby improving the imaging effect of the handheld device.

[0005] The specific technical solutions are as follows:

[0006] The embodiment of the present application provides a focusing mechanism, which is arranged between two lens assemblies of a handheld device; each lens assembly has a lens and a movement arranged in sequence along the incident direction of light; the focusing mechanism includes: a focusing axis, which is arranged in a direction parallel to the optical axis of the lens assembly; a focusing knob, which is fixedly mounted on the focusing axis and can rotate around the axial direction of the focusing axis; a switching knob, which is rotatably mounted on the focusing axis, adjacent to the focusing knob, and can rotate around the axial direction of the focusing axis; a driving mechanism, which is in transmission connection with the switching knob; a transmission mechanism, which includes a first transmission mechanism and a second transmission mechanism; the first transmission mechanism The switching knob is connected to the first lens or the first movement in the first lens assembly; the second transmission mechanism is connected to the second lens or the second movement in the second lens assembly; the switching knob is rotated to the first position to drive the driving mechanism to be connected between the focusing knob and the first transmission mechanism, so that the focusing knob adjusts the position of the first lens or the first movement through the driving mechanism and the first transmission mechanism; the switching knob is rotated to the second position to drive the driving mechanism to be connected between the focusing knob and the second transmission structure, so that the focusing knob adjusts the position of the second lens or the second movement through the driving mechanism and the second transmission mechanism.

[0007] In some embodiments of the present application, the driving mechanism includes: a moving part; the moving part is axially slidably mounted on the focusing shaft and is transmission-connected to the focusing knob through the focusing shaft; the first transmission mechanism and the second transmission mechanism are mounted on the focusing shaft and are respectively located on both sides of the moving part; when the switching knob is rotated to the first position, the moving part moves axially to be transmission-connected with the first transmission mechanism to transmission-connect the focusing knob and the first transmission mechanism; when the switching knob is rotated to the second position, the moving part moves axially to be transmission-connected with the second transmission mechanism to transmission-connect the focusing knob and the second transmission mechanism.

[0008] In some embodiments of the present application, the switching knob includes: an actuator and a curved cylinder; the actuator is mounted on the focusing shaft and can move axially along the focusing shaft; the curved cylinder is mounted on the outside of the actuator and can rotate around the axial direction of the focusing shaft; a curved groove is provided on the wall of the curved cylinder, the first end of the actuator is slidably connected to the curved groove, and the second end is connected to the moving part of the driving mechanism; when the curved cylinder rotates, it can convert its own rotation into axial movement of the actuator through the curved groove, so that the actuator drives the moving part to move axially.

[0009] In some embodiments of the present application, each of the transmission mechanisms includes: a rotating member and an adjusting member; the rotating member is rotatably sleeved on the focusing shaft for transmission connection with the moving member; the adjusting member is sleeved on the rotating member, threadedly connected to the rotating member, and fixedly connected to a lens or movement of a lens assembly; the rotating member can convert its own rotation into axial movement of the adjusting member through a threaded connection; when the moving member is transmission-connected to the first rotating member of the first transmission mechanism, the focusing knob is rotated to drive the focusing shaft, the moving member and the first rotating member to rotate, so that the first adjusting member drives the first lens or the first movement to move axially; when the moving member is transmission-connected to the second rotating member of the second transmission mechanism, the focusing knob is rotated to drive the focusing shaft, the moving member and the second rotating member to rotate, so that the second adjusting member drives the second lens or the second movement to move axially.

[0010] In some embodiments of the present application, the moving part of the driving mechanism is connected to the actuator of the switching knob through a shift rod; the first end of the shift rod is connected to the actuator, and the second end spans the transmission mechanism between the switching knob and the moving part and is connected to the moving part.

[0011] In some embodiments of the present application, a knob shell is provided on the outer fixed sleeve of the curved cylinder; rotating the knob shell can drive the curved cylinder to rotate; the knob shell is attached to the focusing knob; the focusing knob has an opening on the side facing the switching knob; the actuator and the curved cylinder pass through the opening and extend into the accommodating cavity inside the focusing knob.

[0012] In some embodiments of the present application, a base is provided between the actuator and the focusing shaft; the base is rotatably connected to the focusing shaft; the end of the base is fixedly connected to the housing of the lens assembly; a limiting waist hole parallel to the focusing shaft is provided on the outer wall of the base; the third end of the actuator is slidably connected to the limiting waist hole, so that the actuator can move along the axial direction of the focusing shaft when the curved cylinder rotates.

[0013] In some embodiments of the present application, the actuator includes: a movable bracket and a guide column; the movable bracket is arranged between the base and the curved cylinder and is connected to the movable part of the driving mechanism; a through hole is provided on the movable bracket; the guide column is arranged in the through hole, and the first end of the guide column is movably inserted in the curved slide groove, and the second end is movably inserted in the limiting waist hole; when the curved cylinder rotates, the first end of the guide column moves along the curved slide groove, and the second end moves along the limiting waist hole, so as to drive the movable bracket and the movable part to move axially.

[0014] In some embodiments of the present application, the rotating member and the moving member are transmitted by meshing; or, one of the rotating member and the moving member has a protrusion and the other has a groove; the rotating member and the driving member are transmitted by engaging the protrusion and the groove.

[0015] In some embodiments of the present application, the moving member is a driving gear; the rotating member is a rotating gear; the driving gear has teeth on both sides along the axial direction, which are used to engage with the first rotating gear or the second rotating gear to drive the first rotating gear or the second rotating gear to rotate.

[0016] In some embodiments of the present application, each of the transmission mechanisms further includes: a threaded bracket and a spring; the rotating member, the spring and the threaded bracket are arranged in sequence in a direction away from the movable member; the threaded bracket is rotatably sleeved on the focusing shaft, and the axial position of the threaded bracket is fixed; one end of the threaded bracket is clamped with the rotating member so that the threaded bracket can rotate with the rotating member; the adjusting member is threadedly sleeved on the other end of the threaded bracket; the spring is in contact with the rotating member and the threaded bracket so that the rotating member can float axially relative to the threaded bracket.

[0017] In some embodiments of the present application, the adjusting member includes: a sliding nut and a connecting rod; the sliding nut is threadedly mounted on the rotating member; one end of the connecting rod is fixedly connected to the sliding nut, and the other end is fixedly connected to a lens of the lens assembly or the movement; when the rotating member rotates, the sliding nut can drive the connecting rod to move axially, so as to drive the lens or the movement to move axially.

[0018] In some embodiments of the present application, the focusing mechanism also includes: a limit member; the limit member is located between the focusing axis and the lens assembly, and is fixedly connected to the outer shell of the lens assembly; the first adjusting member and the second adjusting member are respectively provided with a first connecting plate and a second connecting plate extending toward the limit member; the first connecting plate and the second connecting plate are slidably connected to the limit member.

[0019] An embodiment of the present application further provides a handheld device, comprising the focusing mechanism described in any of the above embodiments and two lens assemblies; the lens types of the two lens assemblies are different.

[0020] Beneficial effects of the embodiments of the present application:

[0021] The focusing mechanism and handheld device provided in embodiments of the present application include a focusing shaft, a focusing knob, a switching knob, a drive mechanism, and a transmission mechanism. Turning the switching knob to a first position or a second position connects the focusing knob to the first transmission mechanism or the second transmission mechanism via the drive mechanism. Subsequently, turning the focusing knob causes the transmission mechanism to adjust the position of the corresponding lens or camera movement, thereby enabling individual adjustment of the position of each lens or camera movement.

[0022] By using the focusing mechanism provided in the embodiment of the present application, focusing can be completed by simply turning the switching knob and the focusing knob, making the focusing process relatively simple. When the two groups of lens assemblies are of different types or have different focusing parameters, the focusing mechanism provided in the embodiment of the present application can adjust both lenses or both movements to the appropriate position through the above-mentioned process of individually adjusting the position of each lens or movement, so that both groups of lens assemblies can be clearly imaged, thereby improving the imaging effect of the handheld device. In the focusing mechanism provided in the embodiment of the present application, since the switching knob and the focusing knob are both mounted on the focusing shaft and are arranged adjacent to each other on the focusing shaft, the focusing mechanism has a compact structure, which enables focusing without moving the hand, and is convenient for the user to perform focusing operations.

[0023] Of course, it is not necessary to achieve all the advantages described above at the same time when implementing any product or method of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other embodiments can also be obtained based on these drawings.

[0025] Figure 1 A three-dimensional diagram of a handheld device provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 A perspective view of the focusing mechanism at a first angle;

[0027] Figure 3 for Figure 1 a perspective view of the focusing mechanism from a second angle;

[0028] Figure 4 for Figure 1 a perspective view of the focusing mechanism from a third angle;

[0029] Figure 5 for Figure 1 An exploded schematic diagram of the focusing mechanism shown;

[0030] Figure 6 for Figure 1 A cross-sectional view of the focusing mechanism shown;

[0031] Figure 7 for Figure 1 A perspective view of the switching knob shown;

[0032] Figure 8 for Figure 7 An exploded view of the switch knob (base not shown) is shown;

[0033] Figure 9 for Figure 7 A top view of the toggle knob shown;

[0034] Figure 10 for Figure 7 A cross-sectional view of the switching knob shown;

[0035] Figure 11 for Figure 2 A partial structural diagram of the focusing mechanism shown;

[0036] Figure 12 for Figure 2 A cross-sectional view of the focusing mechanism shown;

[0037] Figure 13 for Figure 3 A cross-sectional view of the focusing mechanism shown;

[0038] Figure 14 for Figure 12 A cross-sectional view of the focusing axis shown;

[0039] Figure 15 for Figure 12 A partially exploded schematic diagram of the focusing mechanism shown.

[0040] Reference numerals:

[0041] Handheld device 1;

[0042] Focusing mechanism 10;

[0043] Focusing shaft 100; first shaft section 100a; second shaft section 100b; first shaft shoulder 101; second shaft shoulder 102; third shaft shoulder 103; fourth shaft shoulder 104; mounting groove 105; nut 106; sliding keyway 110; limiting straight surface 120;

[0044] Focusing knob 200; accommodating cavity 210;

[0045] Switch knob 300; actuator 310; movable bracket 311; through hole 3111; guide column 312; curved cylinder 320; curved slide groove 321; limiting protrusion 322; knob housing 330; toggle protrusion 331; limiting groove 332; base 340; limiting waist hole 341; base connecting plate 342; through area 3421; bearing 350; bearing bracket 360; bearing pressure ring 370;

[0046] Driving mechanism 400; moving member 410; driving gear 411; shift fork matching groove 412; shift rod 420; shift fork connecting rod 421; shift fork 422;

[0047] Transmission mechanism 500; rotating member 510; rotating gear 511; hook 5111; guide post hole 5112; adjusting member 520; sliding nut 521; connecting rod 522; first rod 5221; second rod 5222; threaded bracket 530; hook hole 531; guide post 532; spring 540;

[0048] First transmission mechanism 500A; first rotating member 510A; first rotating gear 511A; first adjusting member 520A; first sliding nut 521A; first connecting rod 522A; first connecting plate 523A; third connecting plate 524A; first threaded bracket 530A;

[0049] Second transmission mechanism 500B; second rotating member 510B; second rotating gear 511B; second adjusting member 520B; second sliding nut 521B; second connecting rod 522B; second connecting plate 523B; second threaded bracket 530B;

[0050] Limiting member 600;

[0051] Lens assembly 20; objective lens assembly 201; lens 2011; movement 2012; end lens 2013; eyepiece assembly 202; housing 203; front housing 203a; middle housing 203b; rear housing 203c; rotating connecting plate 2031;

[0052] First lens assembly 20A; first lens 2011A; first movement 2012A; second lens assembly 20B; second lens 2011B; second movement 2012B;

[0053] Fill light 30; laser ranging sensor 40. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field based on this application are within the scope of protection of this application.

[0055] As mentioned in the background, existing handheld devices typically include two lens assemblies and a focus wheel. This wheel is used to adjust the focus lenses within both lens assemblies. During focusing, rotating the focus wheel causes the focus lenses within both lens assemblies to move simultaneously along their optical axes, ensuring that both lenses always move the same distance.

[0056] If the two lens assemblies are of the same type and have the same focusing parameters, rotating a single focusing wheel can simultaneously adjust the focus of both lens assemblies, adjusting both focusing lenses to the appropriate position for clear imaging from both sets of lenses. However, if the two lens assemblies are of different types or have different focusing parameters, for example, one set is a visible light lens assembly and the other is an infrared lens assembly, rotating a single focusing wheel can only adjust one set of lenses to the appropriate position, resulting in clear imaging from one set of lenses while the other set of lenses cannot. If you want the other set of lenses to have a clear image, you need to rotate the focusing wheel again to adjust the focus for that set of lenses. This means that only one set of lenses can be clearly imaged at a time, resulting in poor imaging quality.

[0057] In order to improve the imaging effect of a handheld device, an embodiment of the present application provides a focusing mechanism and a handheld device, wherein the focusing mechanism can adjust the position of each lens individually so that both lens groups can produce clear images.

[0058] See also Figures 1 to 3 , Figure 1 A three-dimensional diagram of a handheld device provided in an embodiment of the present application; Figure 2 for Figure 1 A perspective view of the focusing mechanism at a first angle, and Figure 2 The driving mechanism 400 is shown in a state where it is not connected to either transmission mechanism 500 ; Figure 3 for Figure 1 A perspective view of the focusing mechanism from a second angle, and Figure 3 The driving mechanism 400 is shown in a state of being connected to the first transmission mechanism 500A. Figures 1 to 3 As shown, a focusing mechanism 10 is disposed between two lens assemblies 20 of a handheld device. Each lens assembly 20 comprises a lens 2011 and a movement 2012, arranged sequentially along the direction of incident light. The focusing mechanism 10 comprises a focusing shaft 100, a focusing knob 200, a switching knob 300, a driving mechanism 400, and a transmission mechanism 500.

[0059] The focus axis 100 is arranged parallel to the optical axis of the lens assembly 20. The focus knob 200 is fixedly mounted on the focus axis 100 and can rotate about the axis of the focus axis 100. The switching knob 300 is rotatably mounted on the focus axis 100, adjacent to the focus knob 200, and can rotate about the axis of the focus axis 100. The drive mechanism 400 is in transmission connection with the switching knob 300.

[0060] The transmission mechanism 500 includes a first transmission mechanism 500A and a second transmission mechanism 500B. The first transmission mechanism 500A is connected to the first lens 2011A or the first movement 2012A in the first lens assembly 20A. The second transmission mechanism 500B is connected to the second lens 2011B or the second movement 2012B in the second lens assembly 20B.

[0061] Rotate the switching knob 300 to the first position to drive the driving mechanism 400 to be connected between the focusing knob 200 and the first transmission mechanism 500A, so that the focusing knob 200 adjusts the position of the first lens 2011A or the first movement 2012A through the driving mechanism 400 and the first transmission mechanism 500A to adjust the distance between the first lens 2011A and the first movement 2012A, thereby realizing focal length adjustment, so that the first lens assembly 20A can form a clear image.

[0062] Rotate the switching knob 300 to the second position to drive the driving mechanism 400 to be connected between the focusing knob 200 and the second transmission structure 500B, so that the focusing knob 200 adjusts the position of the second lens 2011B or the second movement 2012B through the driving mechanism 400 and the second transmission mechanism 500B to adjust the distance between the second lens 2011B and the second movement 2012B, thereby achieving focal length adjustment to enable clear imaging of the second lens assembly 20B.

[0063] The focusing mechanism 10 provided in the embodiment of the present application can rotate the switching knob 300 to the first position or the second position, and the focusing knob 200 can be connected to the first transmission mechanism 500A or the second transmission mechanism 500B through the driving mechanism 400; then, rotating the focusing knob 200 can cause the transmission mechanism 500 to adjust the position of the corresponding lens 2011 or movement 2012, so as to achieve individual adjustment of the position of each lens 2011 or movement 2012.

[0064] Using the focusing mechanism 10 provided in the embodiment of the present application, focusing can be completed by simply rotating the switching knob 300 and the focusing knob 200, making the focusing process relatively simple. When the two lens assemblies 20 are of different types or have different focusing parameters, the focusing mechanism 10 provided in the embodiment of the present application can adjust both lenses 2011 or both movements 2012 to the appropriate position through the above-mentioned process of individually adjusting the position of each lens 2011 or movement 2012, so that both lens assemblies 20 can be clearly imaged, thereby improving the imaging effect of the handheld device. In the focusing mechanism 10 provided in the embodiment of the present application, because the switching knob 300 and the focusing knob 200 are both mounted on the focusing shaft 100 and are arranged adjacent to each other on the focusing shaft 100, the focusing mechanism 10 has a compact structure, realizes focusing without moving the hand, and facilitates the user's focusing operation.

[0065] Specifically, in Figure 2 In the embodiment shown, the first transmission mechanism 500A is connected to the first lens 2011A, and the second transmission mechanism 500B is connected to the second lens 2011B. By adjusting the position of the lens 2011, the focal length can be adjusted.

[0066] In other embodiments of the present application, the first transmission mechanism 500A may be connected to the first movement 2012A, and the second transmission mechanism 500B may be connected to the second movement 2012B. By adjusting the position of the movement 2012, the focal length can be adjusted.

[0067] The focal length adjustment mentioned above refers to adjusting the position of the lens 2011 or the movement 2012 to adjust the distance between the lens 2011 and the movement 2012 to change the focal plane position of the imaging so that the observed object can be clearly imaged in the field of view of the handheld device 1.

[0068] The first position and the second position are different positions of the switch knob 300 when rotated around the axial direction. For example, by rotating the switch knob 300 to the left to the first position, the drive mechanism 400 can be connected to the first transmission mechanism 500A, and by rotating the switch knob 300 to the right to the second position, the drive mechanism 400 can be connected to the second transmission mechanism 500B.

[0069] The switching knob 300 and the focusing knob 200 are adjacent to each other. Figures 1 to 3 As shown, the switch knob 300 and the focus knob 200 are arranged in close contact along the axial direction of the focus axis 100, and the two are coaxial and can rotate relatively independently around the axial direction of the focus axis 100 without interfering with each other. This application does not limit the relative position relationship between the switch knob 300 and the focus knob 200. The switch knob 300 can be located on the side of the focus knob 200 away from the lens 2011, or it can be located on the side of the focus knob 200 away from the lens 2011. Figures 1 to 3As shown, it is located on the side of the focus knob 200 close to the lens 2011. This application will be described later by taking the case where the switch knob 300 is located on the side of the focus knob 200 close to the lens 2011 as an example.

[0070] The outer contours of the focus knob 200 and the switch knob 300 may be the same or different. Figure 3 In the illustrated embodiment, the focus knob 200 is provided with a plurality of protrusions evenly spaced apart, while the switch knob 300 is provided with only one toggle protrusion 331 , so that the user can easily distinguish between the two knobs.

[0071] The lens 2011 can be a single lens or a group of lenses, which is not limited in this application. In addition to the lens 2011, the lens assembly 20 can also include other lenses, such as Figures 1 to 3 The end lens 2013 is shown in FIG. The end lens 2013 is located on the side of the lens 2011 close to the observed object and is coaxial with the lens 2011. The end lens 2013 can be a fixed lens or a movable lens, which is not limited in this application.

[0072] Next, the switching process of the driving mechanism 400 will be described in detail.

[0073] In some embodiments of this application, see Figure 4 and Figure 5 , Figure 4 for Figure 1 a perspective view of the focusing mechanism from a third angle; Figure 5 for Figure 1 The exploded diagram of the focusing mechanism is shown in FIG. Figures 3 to 5 As shown, the driving mechanism 400 includes a moving member 410. The moving member 410 is axially slidably sleeved on the focusing shaft 100 and is transmission-connected to the focusing knob 200 via the focusing shaft 100.

[0074] The first transmission mechanism 500A and the second transmission mechanism 500B are sleeved on the focusing shaft 100 and are respectively located on both sides of the moving member 410 .

[0075] When the switching knob 300 is rotated to the first position, the moving member 410 moves axially to be in transmission connection with the first transmission mechanism 500A, so as to transmission connect the focusing knob 200 and the first transmission mechanism 500A.

[0076] When the switching knob 300 is rotated to the second position, the moving member 410 moves axially to be in transmission connection with the second transmission mechanism 500B, so as to transmission connect the focusing knob 200 to the second transmission mechanism 500B.

[0077] In the embodiment of the present application, the focusing knob 200, the switching knob 300, the driving mechanism 400, the first transmission mechanism 500A, and the second transmission mechanism 500B are all mounted on the focusing shaft 100, making the focusing mechanism 10 easy to install and having a stable structure. Due to the stable structure, the above-mentioned components can rotate around the focusing shaft 100 or slide along the focusing shaft 100 stably, thereby ensuring high focusing accuracy. In addition, torque transmission between the focusing knob 200 and the moving part 410 is achieved through the focusing shaft 100, so that the focusing knob 200 and the moving part 410 can achieve torque transmission without direct contact, making the arrangement position of the moving part 410 more flexible. In addition, by achieving torque transmission through the focusing shaft 100, compared with transmitting torque through multiple components, power loss can be reduced, thereby improving the transmission efficiency between the focusing knob 200 and the moving part 410.

[0078] exist Figure 3 and Figure 4 In the illustrated embodiment, the first transmission mechanism 500A is located on the side of the moving member 410 close to the switching knob 300, and the second transmission mechanism 500B is located on the side of the moving member 410 away from the switching knob 300. In other embodiments of the present application, the positions of the first transmission mechanism 500A and the second transmission mechanism 500B may also be swapped, and this application is not limited thereto.

[0079] The specific implementation method of the above-mentioned moving member 410 being axially slidably sleeved on the focusing shaft 100 is as follows: Figure 5 As shown, a sliding key groove 110 extending along the axial direction is provided on the focusing shaft 100, and a protrusion that cooperates with the sliding key groove 110 is provided on the moving member 410, so that the moving member 410 can slide along the axial direction of the focusing shaft 100; the moving member 410 is limited by the sliding key groove 110 in the circumferential direction of the focusing shaft 100, and can rotate synchronously with the focusing shaft 100, but cannot rotate relative to the focusing shaft 100.

[0080] The above structure, with a sliding keyway 110 provided on the focusing shaft 100 and a protrusion provided on the moving member 410, allows for a sliding connection between the focusing shaft 100 and the moving member 410 without requiring any additional connecting structure. This results in a simple and compact structure for easy assembly of the adjustment mechanism 100. The cooperation between the sliding keyway 110 and the protrusion ensures synchronous rotation of the moving member 410 and the focusing shaft 100, thereby ensuring high focusing accuracy.

[0081] See also Figure 6 , Figure 6 for Figure 1 The cross-sectional view of the focusing mechanism is shown in FIG. Figure 5 and Figure 6As shown, the focusing shaft 100 includes: a first shaft section 100a and a second shaft section 100b. The first shaft section 100a and the second shaft section 100b can be an integrally formed structure, that is, the first shaft section 100a and the second shaft section 100b are one shaft; the first shaft section 100a and the second shaft section 100b can also be manufactured separately and are two independent shafts. When the two are manufactured separately, the ends of the two should be fastened together, for example, Figure 6 The end of the second shaft segment 100b is inserted into the first shaft segment 100a and connected to each other via threaded fasteners. Using an integrated molded structure can reduce the number of parts, manufacturing steps, and time. Separately manufactured, installation can be performed in stages, with the components on the first shaft segment 100a installed first, followed by the components on the second shaft segment 100b, and finally connecting the two shaft segments, making installation simpler and more flexible. The components on the first and second shaft segments 100a, 100b can be installed in any order and can be installed simultaneously, further improving installation efficiency.

[0082] When manufactured separately, although the first shaft segment 100a and the second shaft segment 100b are fixedly connected by threaded fasteners, they may become loose after long-term use, causing the first shaft segment 100a and the second shaft segment 100b to rotate relative to each other. To solve this problem, Figure 5 As shown, in the area where the first shaft section 100a and the second shaft section 100b are plugged together, the first shaft section 100a and the second shaft section 100b are both provided with a limiting straight surface 120 (at Figure 5 Only the limiting surface 120 on the second shaft segment 100b is shown in the figure. The two limiting surfaces 120 are fitted together to prevent relative rotation between the first shaft segment 100a and the second shaft segment 100b, thereby ensuring the synchronous rotation of the first shaft segment 100a and the second shaft segment 100b, thereby ensuring the transmission efficiency from the focusing knob 200 to the driving member 410 and the focusing accuracy of the focusing knob 200.

[0083] Regardless of whether the first shaft segment 100a and the second shaft segment 100b are an integrally formed shaft or two independent shafts, their axes are required to coincide, that is, the focusing shaft 100 is a coaxial structure. This can prevent relative offset of components on the first shaft segment 100a and the second shaft segment 100b when the focusing shaft 100 rotates, thereby ensuring focusing accuracy.

[0084] like Figure 6 As shown, on the focusing shaft 100, from the end away from the lens 2011 and in the direction close to the lens 2011, the focusing knob 200, the switching knob 300, the first transmission mechanism 500A, the driving mechanism 400 and the second transmission mechanism 500B are sequentially arranged.

[0085] Since the focusing shaft 100 is a coaxial structure, the above-mentioned components are all mounted on the focusing shaft 100, which can simplify the installation and maintenance process of the focusing mechanism 10; since the above-mentioned components are all mounted on the same focusing shaft 100, it can also avoid vibration and deviation of the components when the focusing shaft 100 rotates, thereby ensuring focusing accuracy and stability during focusing.

[0086] The specific positional relationship of each component mounted on the focusing shaft 100 is as follows: Figure 6 As shown, the focusing knob 200 and the switching knob 300 are positioned adjacent to each other on the first shaft segment 100a, while the remaining components are spaced apart on the second shaft segment 100b. The focusing knob 200 is fixed to the end of the first shaft segment 100a away from the lens 2011 and is securely connected to the first shaft segment 100a via threaded fasteners. The switching knob 300 has one axial end face adjacent to the focusing knob 200, while the other end face is spaced apart from the input end of the first transmission mechanism 500A to provide mounting space for the housing 203 of the lens assembly 20, allowing for rotational connection between the housing 203 and the focusing shaft 100. This positioning of the components makes the focusing mechanism 10 compact in the axial direction.

[0087] Next, the switching principle of the switching knob 300 will be described in detail.

[0088] In some embodiments of this application, see Figures 7 to 10 , Figure 7 for Figure 1 A perspective view of the switching knob shown; Figure 8 for Figure 7 An exploded view of the switch knob (base not shown) is shown; Figure 9 for Figure 7 A top view of the toggle knob shown;

[0089] Figure 10 for Figure 7 The cross section of the switch knob is shown in Figure 2. Figures 6 to 10 As shown, the switching knob 300 includes an actuator 310 and a curved cylinder 320 .

[0090] The actuator 310 is sleeved on the focusing shaft 100 and can move along the axial direction of the focusing shaft 100. The curve cylinder 320 is sleeved on the outside of the actuator 310 and can rotate around the axial direction of the focusing shaft 100.

[0091] like Figure 8 As shown, the curved cylinder 320 is provided with a curved slot 321 on its wall. The slot 321 is arranged around the cylinder wall and extends in the axial direction. The slot 321 is a through slot that penetrates the cylinder wall. The first end of the actuator 310 is slidably connected to the curved slot 321, and the second end is connected to the moving member 410 of the drive mechanism 400.

[0092] When the curved cylinder 320 rotates, its own rotation can be converted into axial movement of the actuator 310 through the curved sliding groove 321, so that the actuator 310 drives the moving member 410 to move axially.

[0093] In this embodiment of the present application, the actuator 310 and the curved cylinder 320 are used to convert rotation into axial movement, resulting in a simple structure for the switch knob 300, making it easier to manufacture and assemble. The nested arrangement of the actuator 310 and the curved cylinder 320 shortens the axial length of the switch knob 300, making the focusing mechanism 10 more compact in the axial direction.

[0094] In some embodiments of the present application, Figure 5 and Figure 6 As shown, the moving member 410 of the driving mechanism 400 is connected to the actuator 310 of the switching knob 300 through the shifting rod 420 .

[0095] A first end of the shifting rod 420 is connected to the actuator 310 , and a second end thereof spans the transmission mechanism 500 between the switching knob 300 and the moving member 410 and is connected to the moving member 410 .

[0096] When the curved cylinder 320 rotates to drive the actuator 310 to move axially, the actuator 310 drives the moving member 410 to move axially via the shifting rod 420 , so that the moving member 410 is connected to one of the transmission mechanisms 500 .

[0097] By applying the embodiment of the present application, the actuator 310 is connected to the movable member 410 by crossing the transmission mechanism 500 through the lever 420, thereby realizing the transmission of the actuator 310 and the movable member 410, so that the structure of the focusing mechanism 10 is simple and the arrangement of the relative position of the switching knob 300 and the movable member 410 is more flexible.

[0098] The present application does not limit the structure of the lever 420 . Any structure that can connect one end to the actuator 310 and the other end to the moving member 410 can serve as the lever 420 .

[0099] Figure 5 and Figure 6 In the embodiment shown, the shift rod 420 includes: a shift fork link 421 and a shift fork 422 that are fixedly connected. The first end of the shift fork link 421 is fixedly connected to the actuator 310, and the second end extends across the first transmission mechanism 500A to the radial side of the moving member 410. Figure 3As shown, a shift fork mating groove 412 is provided on the outer periphery of the movable member 410. The opening of the shift fork mating groove 412 faces outward to allow the insertion of the shift fork 422. The shift fork 422 is fixed to the second end of the shift fork connecting rod 421, and the protrusion on the shift fork 422 engages with the shift fork mating groove 412 on the movable member 410 to achieve a fixed connection between the shift rod 420 and the movable member 410. The specific position of the shift fork mating groove 412 on the movable member 410 is not limited in this application, and the length of the shift rod 420 can be determined based on the position of the shift fork mating groove 412.

[0100] like Figure 4 and Figure 5 As shown, the outer contour of the movable member 410 is circular, and its shift fork mating groove 412 is also circular. Accordingly, the shift fork 422 is configured to have an arcuate contour, and the protrusion thereon for mating with the shift fork mating groove 412 is also arcuate. The above structure can increase the contact area between the shift fork 422 and the movable member 410, thereby improving the stability of the shift lever 420 in driving the movable member 410.

[0101] In some embodiments of the present application, Figures 6 to 8 As shown, a knob housing 330 is fixedly mounted on the outer portion of the curvilinear cylinder 320. Rotating the knob housing 330 can drive the curvilinear cylinder 320 to rotate. The knob housing 330 is attached to the focusing knob 200.

[0102] Because the axial dimensions of the actuator 310 and the curved cylinder 320 are larger than those of the knob housing 330, and space must be reserved on the focus shaft 100 for the actuator 310 to move axially, the switching knob 300 occupies a relatively large axial space, resulting in a larger axial dimension of the focusing mechanism 10. To address this issue, the focusing knob 200 has an opening on the side facing the switching knob 300. The actuator 310 and the curved cylinder 320 extend through the opening into the accommodating cavity 210 within the focusing knob 200.

[0103] By applying the embodiment of the present application, the actuator 310 can move in the internal space surrounded by the knob housing 330, the focusing knob 200 and the focusing shaft 100, so that the end surface of the switching knob 300 on the side close to the lens 2011 is flat. From an overall perspective, the space utilization is improved, the axial space occupied by the switching knob 300 is shortened, the axial length of the focusing shaft 100 can be set shorter, and the structure of the focusing mechanism 10 is more compact.

[0104] Specifically, the fixed connection between the curved cylinder 320 and the knob housing 330 can be a snap connection, and its specific implementation method is shown in FIG. Figure 11 , Figure 11 for Figure 2 The partial structure diagram of the focusing mechanism is shown in FIG. Figure 8 and Figure 11As shown, at least one limiting groove 332 is defined on the end surface of the knob housing 330, with the opening of the limiting groove 332 facing the interior of the knob housing 330. The curved cylinder 320 is provided with an equal number of limiting protrusions 322 on its corresponding end surface. The limiting protrusions 322 are inserted into the limiting grooves 332 along the axial direction, so that the curved cylinder 320 and the knob housing 330 are engaged, thereby achieving synchronous rotation of the curved cylinder 320 and the knob housing 330.

[0105] In some embodiments of this application, see Figure 12 and Figure 13 , Figure 12 for Figure 2 A cross-sectional view of the focusing mechanism shown; Figure 13 for Figure 3 The cross-sectional view of the focusing mechanism is shown in FIG. Figure 7 、 Figure 12 and Figure 13 As shown, a base 340 is sleeved between the actuator 310 and the focusing shaft 100 .

[0106] The base 340 is rotatably connected to the focus shaft 100 . An end of the base 340 is fixedly connected to the housing 203 of the lens assembly 20 .

[0107] A limiting waist hole 341 parallel to the focusing axis 100 is provided on the outer wall of the base 340. The third end of the actuator 310 is slidably connected to the limiting waist hole 341.

[0108] Since the base 340 is fixedly connected to the housing 203 of the lens assembly 20, when the knob housing 330 is rotated, the base 340 remains stationary, and the limiting waist hole 341 on the base 340 limits the rotation of the actuator 310, so that the actuator 310 can move axially along the focusing axis 100 when the curved cylinder 320 rotates.

[0109] By using the embodiment of the present application, a base 340 is provided and a limiting waist hole 341 is opened on the base 340 to limit the rotation of the actuator 310, thereby converting the rotation of the curved cylinder 320 into the axial movement of the actuator 310. By slotting the base 340 and the curved cylinder 320 and cooperating with the actuator 310, the switching knob 300 has a simple structure and is easy to process. The base 340, the actuator 310, the curved cylinder 320 and the knob housing 330 are nested layer by layer, making the switching knob 300 compact and easy to assemble, shortening the axial space occupied by the switching knob 300, and allowing the axial length of the focusing shaft 100 to be set shorter, making the structure of the focusing mechanism 10 more compact.

[0110] The specific structure of the housing 203 of the lens assembly 20 is as follows: Figure 1 and Figure 6As shown, the housing 203 includes a rotating connecting plate 2031. The housing 203 is fixedly connected to the base 340 via the rotating connecting plate 2031. Specifically, the rotating connecting plate 2031 can be sleeved on the focusing shaft 100, and a radial gap is formed between the rotating connecting plate 2031 and the focusing shaft 100, ensuring that the rotation of the focusing shaft 100 is not restricted by the housing 203. The rotating connecting plate 2031 is located between the switching knob 300 and the input end of the first transmission mechanism 500A, and is in contact with the base 340 of the switching knob 300, so that the base 340 and the rotating connecting plate 2031 have a large contact area, preventing the actuator 310 from rotating due to loosening of the base 340, thereby ensuring high focusing accuracy.

[0111] The specific implementation method of the above-mentioned base 340 and the focusing shaft 100 is as follows: Figure 5 、 Figure 12 and Figure 13 As shown, a bearing 350 is sleeved between the base 340 and the focus shaft 100. The inner ring of the bearing 350 is tightly fitted with the focus shaft 100, and the outer ring is tightly fitted with the base 340 to achieve a rotational connection, thereby preventing the rotation of the focus shaft 100 from being restricted by the switch knob 300 when the focus knob 200 is rotated.

[0112] The number of bearings 350 is not limited in this application. Figure 12 In the embodiment shown, the number of bearings 350 is two, and a bearing bracket 360 is provided between the two bearings 350. Figure 14 , Figure 14 for Figure 12 The cross section of the focusing axis is shown in FIG. Figure 12 and Figure 14 As shown, the bearing bracket 360 presses the bearing 350 located on the side close to the lens 2011 against the first shoulder 101 protruding on the focus shaft 100; the end surface of the connection end of the focus knob 200 and the focus shaft 100 presses the bearing 350 located on the side away from the lens 2011 against the bearing bracket 360, thereby achieving axial positioning of the two bearings 350. Figure 12 As shown in , if the end surface diameter of the connection end between the focusing knob 200 and the focusing shaft 100 is smaller than the diameter of the bearing 350 , a bearing pressing ring 370 may be sleeved on the connection end to press the entire bearing 350 .

[0113] like Figure 6 and Figure 10 As shown, the end of the base 340 close to the moving part 410 protrudes outward in the radial direction to form a circle of base connecting plates 342, which are used to be fixedly connected to the rotating connecting plates 2031 of the housing 203 and also to cooperate with the rotating connecting plates 2031 to clamp the curved tube 320 and prevent the curved tube 320 from axial movement. Figure 5 and Figure 10As shown, a through area 3421 is provided on the base connecting plate 342 , so that the shifting rod 420 can pass through the base 340 and be fixedly connected to the actuator 310 .

[0114] In some embodiments of the present application, Figures 6 to 10 As shown, the actuator 310 includes a movable bracket 311 and a guide column 312 .

[0115] The movable bracket 311 is sleeved between the base 340 and the curved cylinder 320 and connected to the moving member 410 of the driving mechanism 400. A through hole 3111 is provided on the movable bracket 311.

[0116] The guide post 312 is disposed in the through hole 3111 , and a first end of the guide post 312 is movably inserted in the curved sliding groove 321 , and a second end of the guide post 312 is movably inserted in the limiting waist hole 341 .

[0117] When the curved cylinder 320 rotates, the first end of the guide post 312 moves along the curved sliding groove 321 , and the second end moves along the limiting waist hole 341 , so as to drive the movable bracket 311 and the moving member 410 to move axially.

[0118] In the embodiment of the present application, the actuator 310 includes a movable bracket 311 and a guide column 312. During installation, the movable bracket 311 can be first connected to the base 340 and the curved tube 320, and then the guide column 312 can be inserted, so that the actuator 310 has a simple structure and is easy to process and assemble.

[0119] The specific assembly process of the switching knob 300 is as follows: the base 340 is sleeved on the inside of the curved tube 320, and the movable bracket 311 is sleeved between the base 340 and the curved tube 320 so that the limiting waist hole 341, the through hole 3111 and the curved slide groove 321 correspond to each other, and then the guide column 312 is inserted, and the knob shell 330 is sleeved on the outside of the curved tube 320 so that the knob shell 330 and the curved tube 320 are snap-fitted, and finally the assembled whole is sleeved on the focusing shaft 100, the base 340 is fixedly connected to the rotating connecting plate 2031, the lever 420 is inserted into the through area 3421 of the base 340, and the movable bracket 311 and the lever 420 are threadedly connected from the other side.

[0120] Specifically, the number of guide posts 312 corresponds to the number of through holes 3111, curved slots 321 and limiting waist holes 341, which can be 1 or more. Figures 7 to 10 Multiple ones are shown to improve the stability of the internal transmission of the switching knob 300. Figures 7 to 10 In the embodiment shown, the number of through holes 3111, limiting waist holes 341 and curved slide grooves 321 are all 3, and are evenly distributed along the circumference and correspond one to one, so that each guide column 312 can pass through the curved slide groove 321, the through hole 3111 and the limiting waist hole 341 in sequence.

[0121] like Figures 7 to 10 As shown, the area on the movable bracket 311 without the through hole 3111 has a thickness in the axial direction that is smaller than the thickness of the area with the through hole 3111 , so as to reduce the weight of the movable bracket 311 and thus reduce the overall weight of the focusing mechanism 10 .

[0122] In some embodiments of the present application, Figure 2 、 Figure 3 and Figure 6 As shown, each transmission mechanism 500 includes a rotating member 510 and an adjusting member 520 .

[0123] The rotating member 510 is rotatably mounted on the focusing shaft 100 and is in transmission connection with the moving member 410. The adjusting member 520 is sleeved on the rotating member 510, threadedly connected to the rotating member 510, and fixedly connected to the lens 2011 or the movement 2012 of a lens assembly 20.

[0124] The rotating member 510 can convert its own rotation into axial movement of the adjusting member 520 through a threaded connection.

[0125] When the moving member 410 is in transmission connection with the first rotating member 510A of the first transmission mechanism 500A, the focusing knob 200 is rotated to drive the focusing shaft 100, the moving member 410 and the first rotating member 510A to rotate, so that the first adjusting member 520A drives the first lens 2011A or the first movement 2012A to move axially.

[0126] When the moving member 410 is in transmission connection with the second rotating member 510B of the second transmission mechanism 500B, the focusing knob 200 is rotated to drive the focusing shaft 100, the moving member 410 and the second rotating member 510B to rotate, so that the second adjusting member 520B drives the second lens 2011B or the second movement 2012B to move axially.

[0127] The distance between the first rotating member 510A and the second rotating member 510B is greater than the axial dimension of the moving member 410, so that when the moving member 410 is transmission-connected to one rotating member 510, it is completely separated from the other rotating member 510, preventing the moving member 410 from driving the two rotating members 510 to rotate at the same time.

[0128] In the embodiments of the present application, the adjusting member 520 is fixedly connected to the lens 2011 or the movement 2012. This allows the adjusting member 520 to drive the lens 2011 or the movement 2012, while also limiting the adjusting member 520 from rotating with the rotating member 510. This eliminates the need for a separate limiting mechanism to restrict the rotation of the adjusting member 520, simplifying the structure of the transmission mechanism 500. Furthermore, the rotating member 510 and the adjusting member 520 are threadedly connected, and this method limits the rotation of the adjusting member 520, converting the rotation of the rotating member 510 into axial movement of the adjusting member 520. This simplifies the structure of the transmission mechanism 500 and facilitates fabrication.

[0129] In some embodiments of the present application, Figure 3 As shown, the rotating member 510 and the moving member 410 are engaged to transmit the power. Alternatively, one of the rotating member 510 and the moving member 410 has a protrusion and the other has a groove; the rotating member 510 and the driving member 410 are engaged to transmit the power through the protrusion and groove. In the embodiment of the present application, the rotating member 510 and the moving member 410 are connected by meshing or snapping, so that the moving member 410 can drive the rotating member 510 to rotate, and the rotating member 510 and the moving member 410 have a simple structure and are easy to process.

[0130] The following describes an embodiment in which the rotating member 510 and the moving member 410 are connected by meshing.

[0131] In some embodiments of the present application, Figure 5 and Figure 6 As shown, the moving member 410 is a driving gear 411 , and the rotating member 510 is a rotating gear 511 .

[0132] The driving gear 411 has teeth on both sides along the axial direction for engaging with the first rotating gear 511A or the second rotating gear 511B to drive the first rotating gear 511A or the second rotating gear 511B to rotate.

[0133] In the embodiment of the present application, the rotating gear 511 and the driving gear 411 are meshed and connected, which has a simple structure and is easy to process. Compared with the connection through protrusions and grooves, the contact area between the rotating part 510 and the moving part 410 is increased, making the transmission smoother and the transmission accuracy higher, and achieving more precise focusing.

[0134] Specifically, the rotating gear 511 can be directly threadedly connected to the adjusting member 520, that is, the rotating gear 511 is provided with an external thread or an internal thread at one end close to the adjusting member 520, and is threadedly connected to the adjusting member 520. The rotating gear 511 can also be indirectly threadedly connected to the adjusting member 520 through other components, as described later.

[0135] In some embodiments of this application, see Figure 15 , Figure 15 for Figure 12 The following is a partial exploded diagram of the focusing mechanism. Figure 12 、 Figure 13 and Figure 15 As shown, each transmission mechanism 500 further includes: a threaded bracket 530 and a spring 540 .

[0136] The rotating member 510 , the spring 540 and the threaded bracket 530 are sequentially arranged in a direction away from the moving member 410 .

[0137] The threaded bracket 530 is rotatably mounted on the focusing shaft 100, and its axial position is fixed. One end of the threaded bracket 530 is engaged with the rotating member 510, allowing the threaded bracket 530 to rotate with the rotating member 510. The adjustment member 520 is threadably mounted on the other end of the threaded bracket 530.

[0138] The spring 540 abuts against the rotating member 510 and the threaded bracket 530 , so that the rotating member 510 can float axially relative to the threaded bracket 530 .

[0139] By applying the embodiment of the present application, when the driving gear 411 moves toward the rotating gear 511, if the driving gear 411 and the rotating gear 511 are in tooth tip-to-tooth contact, the rotating gear 511 can float based on the spring 540 and retreat relative to the driving gear 411 to prevent damage to the tooth tip and ensure that the driving gear 411 and the rotating gear 511 are successfully engaged.

[0140] Specifically, the rotating gear 511 and the adjusting member 520 of the embodiment of the present application are indirectly connected through the threaded bracket 530. The threaded bracket 530 is provided with an external thread, and the adjusting member 520 is provided with an internal thread. The adjusting member 520 is sleeved on the outside of the threaded bracket 530 and is threadedly connected to it.

[0141] The threaded brackets 530 of the two rotating parts 510 are axially positioned by the shoulders on the focusing shaft 100, as shown in FIG. Figures 12 to 14 As shown, the first shaft segment 100a of the focusing shaft 100 has a larger diameter than the second shaft segment 100b, resulting in a second shoulder 102 formed at the end surface of the first shaft segment 100a. The second shaft segment 100b has a raised third shoulder 103, and the first threaded bracket 530A is fixed in the gap between the second shoulder 102 and the third shoulder 103 to achieve axial position fixation.

[0142] A raised fourth shoulder 104 and a mounting groove 105 are provided on the end of the second shaft section 100b close to the lens 2011. The mounting groove 105 is used to fix the mounting nut 106. The nut 106 presses the second threaded bracket 530B against the fourth shoulder 104 to fix the axial position of the second threaded bracket 530B.

[0143] A specific implementation method of engaging one side of the threaded bracket 530 with the rotating gear 511 is as follows: Figure 15 As shown, the rotating gear 511 is provided with a plurality of hooks 5111 evenly distributed along the circumference, and the threaded bracket 530 is correspondingly provided with a plurality of hook holes 531; the hooks 5111 pass through the hook holes 531 to achieve locking, which can limit the rotation of the threaded bracket 530 relative to the rotating gear 511, and can also limit the rotating gear 511 from moving in a direction away from the threaded bracket 530 to cause disengagement.

[0144] A plurality of guide posts 532 evenly distributed along the circumference are further provided on the side of the threaded bracket 530 facing the rotating gear 511, and a plurality of guide post holes 5112 are correspondingly provided on the rotating gear 511; the guide posts 532 are inserted into the guide post holes 5112 to guide the floating of the rotating gear 511 and ensure that the threaded bracket 530 and the rotating gear 511 rotate synchronously.

[0145] The number of springs 540 can be one or more, and this application does not limit this. Figure 15 In the illustrated embodiment, the number of the springs 540 is three, and the three springs 540 are evenly distributed along the circumference to ensure that the floating amount of each area of the rotating gear 511 is the same.

[0146] In some embodiments of the present application, Figures 2 to 4 As shown, the adjusting member 520 includes a sliding nut 521 and a connecting rod 522 .

[0147] The sliding nut 521 is threadedly sleeved on the rotating member 510. One end of the connecting rod 522 is fixedly connected to the sliding nut 521, and the other end is fixedly connected to the lens 2011 or the movement 2012 of a lens assembly 20.

[0148] When the rotating member 510 rotates, the sliding nut 521 can drive the connecting rod 522 to move axially, thereby driving the lens 2011 or the movement 2012 to move axially.

[0149] In the embodiment of the present application, the sliding nut 521 is threadedly connected to the rotating member 510, so that part of the rotating member 510 is located in the sliding nut 521. Figure 6 As shown, when the rotating member 510 and the adjusting member 520 are indirectly threadedly connected, the sliding nut 521 is threadedly sleeved on the threaded bracket 530, and the threaded bracket 530 is completely located in the sliding nut 521, shortening the axial space occupied by the transmission mechanism 500 on the focusing shaft 100, making the transmission mechanism 500 more compact and the focusing shaft 100 can be set shorter.

[0150] In some embodiments of the present application, the adjusting member 520 is connected to the lens 2011 only by a connecting rod 522. When the rotating member 510 rotates, the lens 2011 is limited by the connecting rod 522 to rotate the adjusting member 520. As a result, the end of the connecting rod 522 connected to the adjusting member 520 tends to rotate, while the end connected to the lens 2011 remains stationary. This can easily cause the connecting rod 522 to wobble, affecting the focusing accuracy and also shortening the life of the connecting rod 522. To solve this problem, Figures 1 to 4 As shown, the focusing mechanism 10 further includes a limiting member 600 .

[0151] The limiting member 600 is located between the focusing shaft 100 and the lens assembly 20 and is fixedly connected to the housing 203 of the lens assembly 20 .

[0152] The first adjusting member 520A and the second adjusting member 520B are respectively provided with a first connecting plate 523A and a second connecting plate 523B extending toward the stopper 600. The first connecting plate 523A and the second connecting plate 523B are slidably connected to the stopper 600.

[0153] In the embodiment of the present application, a stopper 600 is fixedly mounted on the housing 203. The stopper 600 limits the rotation of the two adjusting members 520, thereby preventing shaking of the connecting rod 522 when the focus knob 200 is rotated, thereby ensuring focusing accuracy and extending the life of the connecting rod 522. Furthermore, the first connecting plate 523A and the second connecting plate 523B are slidably connected to the stopper 600. The stopper 600 also guides the first and second adjusting members 520A, 520B, ensuring that the first and second adjusting members 520A, 520B always move axially, thus ensuring focusing accuracy.

[0154] The first connecting plate 523A and the first sliding nut 521A, the second connecting plate 523B and the second sliding nut 521B can all be as follows Figure 5 The structure shown is an integrally formed structure, but it can also be manufactured separately and connected by fasteners, which is not limited in this application.

[0155] The specific structure of the limiting member 600 is not limited in this application. As long as the structure can achieve the same sliding connection direction as the first connecting plate 523A and the second connecting plate 523B, it can be used as the limiting member 600.

[0156] like Figures 1 to 4 As shown, the limiting member 600 may be a limiting column, which is arranged in a direction parallel to the focusing axis 100 , and one end of which is fixedly connected to the housing 203 .

[0157] Specifically, if Figure 1As shown, the number of the limiting member 600 can be one, which is disposed on one side of the focus shaft 100, with its end fixedly connected to the rotating connecting plate 2031 of the housing 203, and the first connecting plate 523A and the second connecting plate 523B are both slidably connected to the limiting member 600. In other embodiments of the present application, the number of the limiting members 600 can also be two, with the two limiting members 600 being disposed on both sides of the focus shaft 100, with their ends fixedly connected to the rotating connecting plate 2031 of the housing 203, and the first connecting plate 523A and the second connecting plate 523B each being slidably connected to one limiting member 600.

[0158] When one limiter 600 is used, the number of components can be reduced, making the structure of the focusing mechanism 10 more compact; when two limiters 600 are used, the first connecting plate 523A and the second connecting plate 523B do not need to share one limiter 600, which makes the layout more flexible.

[0159] like Figure 2 As shown, when the number of limit members 600 is one, the limit member 600 and the second connecting rod 522B of the second adjustment member 520B are located on the same side of the focusing axis 100, are both connected to the second connecting plate 523B, and are spaced apart on the second connecting plate 523B. The first connecting rod 522A of the first adjustment member 520A is located on the other side of the focusing axis 100. The first adjustment member 520A is also provided with a third connecting plate 524A for connecting to the first connecting rod 522A. Using this structure, the connecting rods 522 of the two adjustment members 520 are respectively located on either side of the focusing axis 100 and connected to the two lenses 2011, respectively, thereby avoiding interference during focusing caused by the two connecting rods 522 being located on the same side.

[0160] Since the distance between the first sliding nut 521A of the first adjusting member 520A and the first lens 2011A is greater than the distance between the second sliding nut 521B of the second adjusting member 520B and the second lens 2011B, the lengths of the two connecting rods 522 are different to ensure that the two lens assemblies 20 are aligned.

[0161] The shape and size of the connecting rod 522 can be set accordingly according to the position of the lens 2011 and the position of the sliding nut 521 . The present application does not limit the shape and size of the connecting rod 522 .

[0162] In some embodiments of the present application, Figures 2 to 5 As shown, each connecting rod 522 includes a first rod member 5221 and a second rod member 5222 that are connected to each other.

[0163] The first rod 5221 is connected to the adjusting member 520. The second rod 5222 is connected to the lens 2011 or the movement 2012. The distance between the first rods 5221 of the two connecting rods 522 is smaller than the distance between the second rods 5222 of the two connecting rods 522.

[0164] Specifically, the first rod 5221 and the second rod 5222 can be an integrally formed structure, or can be a Figure 5 As shown, they are manufactured separately and connected by threaded fasteners, which is not limited in this application.

[0165] In the embodiment of the present application, the distance between the two first rods 5221 is smaller than the distance between the two second rods 5222 , so that a suitable distance can be left between the two lens assemblies 20 to match the user's pupil distance.

[0166] Below, the handheld device provided in the embodiment of the present application is described in detail.

[0167] like Figures 1 to 4 As shown, the handheld device includes the focusing mechanism 10 of any of the above embodiments and two lens assemblies 20. The two lens assemblies 20 have different lens types, for example, one is a visible light lens assembly and the other is an infrared lens assembly. That is, the first lens assembly 20A can be either a visible light lens assembly or an infrared lens assembly, and the second lens assembly 20B can be the other.

[0168] The handheld device provided in the embodiment of the present application utilizes the focusing mechanism 10 of any of the above-described embodiments. Focusing can be accomplished by simply rotating the switch knob 300 and the focus knob 200, making the focusing process relatively simple. When the two lens assemblies 20 are of different types or have different focusing parameters, the switch knob 300 can be rotated to connect the focus knob 200 to the first transmission mechanism 500A or the second transmission mechanism 500B. Subsequently, rotating the focus knob 200 causes the transmission mechanism 500 to adjust both lenses 2011 or both movements 2012 to the appropriate position, allowing both lens assemblies 20 to produce clear images, thereby improving the imaging effect of the handheld device. In the handheld device provided in the embodiment of the present application, since the switch knob 300 and the focus knob 200 are both mounted on the focus shaft 100 and positioned adjacent to each other on the focus shaft 100, the focus mechanism 10 is compact, enabling single-handed focusing without requiring movement of the hand, making focusing operations easier for the user.

[0169] In some embodiments of the present application, Figures 1 to 4 As shown, the lens assembly 20 includes an objective lens assembly 201 and an eyepiece lens assembly 202 spaced apart along the optical axis. The objective lens assembly 201 includes a lens 2011 and a movement 2012 sequentially arranged along the incident direction of light.

[0170] The focus knob 200 and the switch knob 300 of the focus mechanism 10 are located at one end close to the eyepiece assembly 202 .

[0171] The housing 203 of the lens assembly 20 is as follows: Figure 1 As shown, it includes a front shell 203a, a middle shell 203b and a rear shell 203c arranged in sequence along the incident direction of light. The front shell 203a wraps the objective lens assembly 201; the middle shell 203b is a gripping area and is rotatably connected to the focusing shaft 100.

[0172] The specific positions of the focus knob 200 and the switch knob 300 correspond to the connection between the middle shell 203b and the rear shell 203c. When using the handheld device, the user holds the middle shell 203b, and when focusing is required, only one finger is required to rotate the focus knob 200 and the switch knob 300.

[0173] When using the embodiment of the present application, the focusing knob 200 and the switching knob 300 are located at one end close to the eyepiece assembly 202, that is, close to the user's holding position, making operation more convenient. In addition, the weight of one end of the objective lens assembly 201 of the handheld device is reduced, so that the user has a better user experience when holding the device.

[0174] In some embodiments of the present application, Figure 1 As shown, the handheld device also includes a fill light 30 and a laser ranging sensor 40. The fill light 30 and the laser ranging sensor 40 are fixed between the two middle shells 203b and located at the end of the focusing mechanism 10 near the objective lens assembly 201. The fill light 30 is used to provide auxiliary lighting in low light conditions to improve the imaging effect of the handheld device; the laser ranging sensor 40 is used to measure the distance between the handheld device and the observed object.

[0175] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0176] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application are included in the scope of protection of the present application.

Claims

1. A focusing mechanism, characterized in that: It is arranged between two lens assemblies (20) of a handheld device; each lens assembly (20) comprises a lens (2011) and a movement (2012) arranged in sequence along the incident direction of light; the focusing mechanism (10) comprises: A focusing axis (100) is arranged parallel to the optical axis of the lens assembly (20); A focusing knob (200) is fixedly sleeved on the focusing shaft (100) and can rotate around the axial direction of the focusing shaft (100); A switching knob (300) is rotatably sleeved on the focusing shaft (100), adjacent to the focusing knob (200), and rotatable around the axial direction of the focusing shaft (100); The driving mechanism (400) is in transmission connection with the switching knob (300); A transmission mechanism (500), comprising a first transmission mechanism (500A) and a second transmission mechanism (500B); The first transmission mechanism (500A) is connected to the first lens (2011A) or the first movement (2012A) in the first lens assembly (20A); the second transmission mechanism (500B) is connected to the second lens (2011B) or the second movement (2012B) in the second lens assembly (20B); The switching knob (300) is rotated to a first position to drive the driving mechanism (400) to be connected between the focusing knob (200) and the first transmission mechanism (500A), so that the focusing knob (200) adjusts the position of the first lens (2011A) or the first movement (2012A) through the driving mechanism (400) and the first transmission mechanism (500A); The switching knob (300) is rotated to a second position to drive the driving mechanism (400) to be connected between the focusing knob (200) and the second transmission structure (500B), so that the focusing knob (200) adjusts the position of the second lens (2011B) or the second movement (2012B) through the driving mechanism (400) and the second transmission mechanism (500B).

2. The focusing mechanism according to claim 1, wherein: The driving mechanism (400) comprises: a moving part (410); The moving member (410) is axially slidably sleeved on the focusing shaft (100) and is transmission-connected to the focusing knob (200) via the focusing shaft (100); The first transmission mechanism (500A) and the second transmission mechanism (500B) are sleeved on the focusing shaft (100) and are respectively located on both sides of the moving part (410); When the switching knob (300) is rotated to the first position, the moving member (410) moves axially to be in transmission connection with the first transmission mechanism (500A), thereby transmission connecting the focusing knob (200) and the first transmission mechanism (500A); When the switching knob (300) is rotated to the second position, the moving member (410) moves axially to be in transmission connection with the second transmission mechanism (500B), so as to transmission connect the focusing knob (200) and the second transmission mechanism (500B).

3. The focusing mechanism according to claim 2, wherein: The switching knob (300) comprises: an actuator (310) and a curved cylinder (320); The actuator (310) is sleeved on the focusing shaft (100) and can move along the axial direction of the focusing shaft (100); the curved cylinder (320) is sleeved outside the actuator (310) and can rotate around the axial direction of the focusing shaft (100); A curved sliding groove (321) is provided on the wall of the curved cylinder (320); a first end of the actuator (310) is slidably connected to the curved sliding groove (321), and a second end is connected to the moving member (410) of the driving mechanism (400); When the curved cylinder (320) rotates, its own rotation can be converted into axial movement of the actuator (310) through the curved sliding groove (321), so that the actuator (310) drives the moving member (410) to move axially.

4. The focusing mechanism according to claim 2, wherein: Each transmission mechanism (500) comprises: a rotating member (510) and an adjusting member (520); The rotating member (510) is rotatably sleeved on the focusing shaft (100) and is used for transmission connection with the moving member (410); the adjusting member (520) is sleeved on the rotating member (510), threadedly connected to the rotating member (510), and fixedly connected to a lens (2011) or a movement (2012) of a lens assembly (20); The rotating member (510) can convert its own rotation into axial movement of the adjusting member (520) through a threaded connection; When the moving member (410) is in transmission connection with the first rotating member (510A) of the first transmission mechanism (500A), the focusing knob (200) is rotated to drive the focusing shaft (100), the moving member (410) and the first rotating member (510A) to rotate, so that the first adjusting member (520A) drives the first lens (2011A) or the first movement (2012A) to move axially; When the moving member (410) is in transmission connection with the second rotating member (510B) of the second transmission mechanism (500B), the focusing knob (200) is rotated to drive the focusing shaft (100), the moving member (410) and the second rotating member (510B) to rotate, so that the second adjusting member (520B) drives the second lens (2011B) or the second movement (2012B) to move axially.

5. The focusing mechanism according to claim 3, wherein: The moving part (410) of the driving mechanism (400) is connected to the actuator (310) of the switching knob (300) via a shifting rod (420); The first end of the shifting rod (420) is connected to the actuator (310), and the second end thereof spans the transmission mechanism (500) between the switching knob (300) and the moving member (410) and is connected to the moving member (410).

6. The focusing mechanism according to claim 3, wherein: The outer fixed sleeve of the curved cylinder (320) is provided with a knob housing (330); rotating the knob housing (330) can drive the curved cylinder (320) to rotate; The knob housing (330) is attached to the focusing knob (200); The focusing knob (200) has an opening on a side facing the switching knob (300); the actuator (310) and the curved cylinder (320) pass through the opening and extend into the accommodating cavity (210) inside the focusing knob (200).

7. The focusing mechanism according to claim 3, wherein: A base (340) is sleeved between the actuator (310) and the focusing shaft (100); The base (340) is rotatably connected to the focusing shaft (100); an end of the base (340) is fixedly connected to the housing (203) of the lens assembly (20); A limiting waist hole (341) parallel to the focusing axis (100) is provided on the outer wall of the base (340); The third end of the actuator (310) is slidably connected to the limiting waist hole (341), so that the actuator (310) can move along the axial direction of the focusing shaft (100) when the curved cylinder (320) rotates.

8. The focusing mechanism according to claim 7, wherein: The actuator (310) includes: a movable bracket (311) and a guide column (312); The movable bracket (311) is sleeved between the base (340) and the curved cylinder (320), and is connected to the moving part (410) of the driving mechanism (400); a through hole (3111) is provided on the movable bracket (311); The guide column (312) is arranged in the through hole (3111), the first end of the guide column (312) is movably inserted in the curved sliding groove (321), and the second end is movably inserted in the limiting waist hole (341); When the curved cylinder (320) rotates, the first end of the guide column (312) moves along the curved sliding groove (321), and the second end moves along the limiting waist hole (341), thereby driving the movable bracket (311) and the movable member (410) to move axially.

9. The focusing mechanism according to claim 4, wherein: The rotating member (510) and the moving member (410) are engaged to transmit the power; or, One of the rotating member (510) and the moving member (410) has a protrusion, and the other has a groove; the rotating member (510) and the driving member (410) are connected by the protrusion and the groove to transmit power.

10. The focusing mechanism according to claim 9, wherein: The moving member (410) is a driving gear (411); the rotating member (510) is a rotating gear (511); The driving gear (411) has teeth on both sides along the axial direction, which are used to engage with the first rotating gear (511A) or the second rotating gear (511B) to drive the first rotating gear (511A) or the second rotating gear (511B) to rotate.

11. The focusing mechanism according to claim 4, wherein: Each of the transmission mechanisms (500) further includes: a threaded bracket (530) and a spring (540); The rotating member (510), the spring (540) and the threaded bracket (530) are sequentially arranged in a direction away from the moving member (410); The threaded bracket (530) is rotatably sleeved on the focusing shaft (100), and the axial position of the threaded bracket (530) is fixed; one end of the threaded bracket (530) is engaged with the rotating member (510), so that the threaded bracket (530) can rotate along with the rotating member (510); The adjusting member (520) is threadedly sleeved on the other end of the threaded bracket (530); The spring (540) abuts against the rotating member (510) and the threaded bracket (530), so that the rotating member (510) can float in the axial direction relative to the threaded bracket (530).

12. The focusing mechanism according to claim 4, wherein: The adjusting member (520) comprises: a sliding nut (521) and a connecting rod (522); The sliding nut (521) is threadedly sleeved on the rotating member (510); One end of the connecting rod (522) is fixedly connected to the sliding nut (521), and the other end is fixedly connected to a lens (2011) of the lens assembly (20) or the movement (2012); When the rotating member (510) rotates, the sliding nut (521) can drive the connecting rod (522) to move axially, thereby driving the lens (2011) or the movement (2012) to move axially.

13. The focusing mechanism according to claim 4, wherein: The focusing mechanism (10) further includes: a limiting member (600); The limiting member (600) is located between the focusing shaft (100) and the lens assembly (20), and is fixedly connected to the housing (203) of the lens assembly (20); The first adjusting member (520A) and the second adjusting member (520B) are respectively provided with a first connecting plate (523A) and a second connecting plate (523B) extending toward the limiting member (600); The first connecting plate (523A) and the second connecting plate (523B) are slidably connected to the limiting member (600).

14. A handheld device, characterized in that: The invention comprises the focusing mechanism (10) according to any one of claims 1 to 13 and two lens assemblies (20); the lens types of the two lens assemblies (20) are different.

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