A dual-optical handheld lens device and a manual focusing device thereof

Abstract

The utility model discloses a kind of dual-optical handheld lens equipment and manual focusing device thereof, it is related to lens focusing technical field, the dual-optical handheld lens equipment includes manual focusing mechanism, and manual focusing mechanism includes: rotating mechanism, including focusing wheel, screw rod, nut and pull rod, the inside of focusing wheel is hollow, screw rod is located in the inside of focusing wheel and is connected with it, nut is sleeved in screw rod and is connected with the pull rod parallel with screw rod, the bottom of pull rod passes through the open bottom end of focusing wheel and extends out;Lever mechanism, including support and lever, support is equipped with the lever that can rotate around it, the first end of lever is connected with the bottom of pull rod, the second end of lever is used to connect the core that moves coaxially relative to lens, and the linear distance from the first end of lever to support is greater than the linear distance from the second end of lever to support. The present application can improve the resolution of adjustment, while reducing the processing, assembly difficulty of parts, and two manual focusing mechanisms of integrated design can be designed.

Description

Technical Field

[0001] This utility model relates to the field of lens focusing technology, and more specifically, to a manual focusing device. Furthermore, this utility model also relates to a dual-beam handheld lens device including the aforementioned manual focusing device. Background Technology

[0002] Lens focusing on dual-lens handheld camera devices is divided into manual and electric types. Typically, the lens contains movable elements located within the lens group of the camera movement. Focusing is achieved by adjusting the distance between the camera movement and the lens using a motor or focusing wheel. Electric focusing requires a motor, resulting in a complex structure and more space, a heavier lens, and poorer focus locking capability. Therefore, manual focusing is now more commonly used.

[0003] Existing manual focusing requires a focusing wheel and other structures (such as a threaded drive structure) to work together, which has the following main disadvantages:

[0004] 1. To achieve a high adjustment resolution, the distance between the camera mechanism and the lens needs to be precisely controlled. In other words, the user can achieve a small-pitch (e.g., 0.05mm) step accuracy by manually rotating the focusing wheel, which results in high requirements for the processing and assembly of the mechanism parts.

[0005] 2. For dual-light handheld lenses, each lens is equipped with a manual focusing mechanism. Even if the two manual focusing mechanisms are distributed independently, it will disrupt the product's appearance and is not conducive to the appearance design.

[0006] Therefore, how to solve the above-mentioned shortcomings of existing manual focusing mechanisms is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] In view of this, the purpose of this utility model is to provide a manual focusing device that can improve the adjustment resolution while reducing the difficulty of processing and assembling parts.

[0008] Another objective of this invention is to provide a dual-light handheld lens device that includes the aforementioned manual focusing device, featuring two integrated manual focusing mechanisms.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A manual focusing device includes a manual focusing mechanism, the manual focusing mechanism comprising:

[0011] The rotating mechanism includes a focusing wheel, a screw, a nut, and a pull rod. The focusing wheel is hollow inside. The screw is located inside the focusing wheel and connected to it. The nut is sleeved on the screw and connected to the pull rod, which is parallel to the screw. The bottom of the pull rod extends through the bottom of the opening of the focusing wheel.

[0012] A lever mechanism includes a support and a lever, the support having the lever rotatable therearound, a first end of the lever being connected to the bottom of the pull rod, a second end of the lever being used to connect to a movement that moves coaxially relative to the lens, and the straight-line distance from the first end of the lever to the support being greater than the straight-line distance from the second end of the lever to the support.

[0013] Preferably, the manual focusing mechanism is provided in two parts, namely a first manual focusing mechanism and a second manual focusing mechanism;

[0014] The first focusing wheel and the second focusing wheel are arranged adjacent to each other along an axis. The first screw is coaxially disposed inside the first focusing wheel and extends through the bottom opening of the first focusing wheel to form a connecting part. The second screw is coaxially disposed inside the second focusing wheel and has a central hole. The connecting part passes through a through hole at the top of the second focusing wheel, is inserted into the central hole, and extends to the bottom of the second focusing wheel. The connecting part is clearance-fitted with the central hole. The top of the second focusing wheel is provided with a deep groove ball bearing sleeved on the first screw.

[0015] A thrust ball bearing is sleeved on the connecting part and located at the bottom end of the second screw. A first nut is sleeved on the connecting part between the thrust ball bearing and the bottom end of the second focusing wheel. The first nut is connected to a first pull rod located on one side of the connecting part. The first pull rod extends out of the bottom end of the opening of the second focusing wheel in a direction parallel to the first axis.

[0016] The second nut is fitted onto the second screw, and the second nut is connected to the second pull rod located on the other side of the connecting part. The second pull rod extends out of the bottom end of the opening of the second focusing wheel in a direction parallel to the first axis.

[0017] Preferably, a thrust ball bearing is fitted onto the rod body near its top end of the second screw.

[0018] Preferably, the top of the second focusing wheel is provided with a boss having the second through hole in the middle. The boss extends into the bottom of the first focusing wheel. One end face of the boss is recessed with a groove surrounding the second through hole. The second screw is disposed in the groove and the center hole is aligned with the second through hole.

[0019] Preferably, the other end face of the boss is provided with an annular protrusion surrounding the second through hole, and the first deep groove ball bearing is disposed between the annular protrusion and the first screw.

[0020] Preferably, the top of the first screw passes through a through hole at the top of the first focusing wheel and is fastened by a locking nut, and a deep groove ball bearing is fitted on the top of the first screw.

[0021] Preferably, it also includes a base, on which are provided an opening one, an opening two and an opening three located between the two, the connecting part is inserted into the opening three and a deep groove ball bearing three is provided between the two, the bottom end of the opening of the second focusing wheel is provided in the annular groove at the top of the base through the bearing, the first pull rod passes through the opening one and is clearance-fitted with it, and the second pull rod passes through the opening two and is clearance-fitted with it.

[0022] Preferably, the outer peripheral walls of both the first focusing wheel and the second focusing wheel are provided with anti-slip textures.

[0023] A dual-light handheld lens device includes a manual focusing device as described in any one of the above claims and two lens devices. Each lens device includes a lens and a mechanism. The mechanism is located behind the lens and the two are arranged along axis two. The mechanism is movable relative to the lens along axis two, and axis two is parallel to axis one.

[0024] The movement in one of the lens devices is connected to the first lever via a lever mechanism, and the movement in another lens device is connected to the second lever via another lever mechanism.

[0025] Preferably, the lens housing is provided with a linear guide rail assembly extending in a direction parallel to the second axis, and the movement is mounted on the linear guide rail assembly via a bracket.

[0026] The manual focusing device provided by this utility model has a manual focusing mechanism in which the pull rod is set along the axis parallel to the lens during installation, and the screw is also set along the axis parallel to the lens. The following description takes the lens axis along the vertical direction as an example.

[0027] When using the manual focusing mechanism, the user rotates the focusing wheel, which drives the screw to rotate. The screw's rotational motion is converted into the linear movement of the nut, which drives the pull rod to move up and down. The pull rod's up-and-down movement causes the first end of the lever to swing up and down around the support. Since the camera movement is set to move coaxially with the lens, meaning the camera movement can move relative to the lens in the vertical direction, the second end of the pull rod swinging up and down around the support can drive the camera movement to move up and down, thereby adjusting the distance between the camera movement and the lens, i.e., achieving lens focusing.

[0028] It should be noted that the straight-line distance from the first end of the lever to the support is greater than the straight-line distance from the second end of the lever to the support. The first end of the lever is the effort end, and the second end of the lever is the resistance end. Obviously, the lever is a force-saving lever. According to the lever balance condition, the longer the effort arm, the more effort is saved, but the greater the distance that the lever on the effort end needs to move. That is, the amount of movement of the effort end is greater than the amount of movement of the resistance end. In other words, the amount of movement of the lever is greater than the amount of movement of the mechanism.

[0029] Therefore, the manual focusing mechanism of this application does not require the machining of screws and threads with precision threads. By controlling the power arm of the lever to be longer than the resistance arm, small-pitch stepping of the movement can be achieved, thereby accurately controlling the distance between the movement and the lens, improving the adjustment resolution, and reducing the difficulty of machining and assembling parts. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0031] Figure 1 A schematic diagram of a dual-light handheld lens device provided in this application;

[0032] Figure 2 for Figure 1 A cross-sectional view of the structure shown;

[0033] Figure 3 for Figure 1 A cross-sectional view of the first and second rotating mechanisms shown.

[0034] Figure 4 for Figure 1 An exploded view of the visible light lens assembly shown;

[0035] Figure 5 for Figure 1 An exploded view of the infrared camera device shown.

[0036] Figure label:

[0037] 01. Manual focusing device; 02. Visible light lens device; 03. Infrared lens device;

[0038] 1. First rotating mechanism; 1-1. First focusing wheel; 1-2. First screw; 1-3. First nut; 1-4. First pull rod;

[0039] 2. First lever mechanism; 2-1. First support; 2-2. First lever;

[0040] 3. Second rotating mechanism; 3-1. Second focusing wheel; 3-2. Second screw; 3-3. Second nut; 3-4. Second pull rod; 3-5. Boss; 3-6. Annular protrusion;

[0041] 4. Second lever mechanism; 4-1. Second support; 4-2. Second lever;

[0042] 5. Thrust ball bearing 1; 6. Thrust ball bearing 2; 7. Deep groove ball bearing 1; 8. Deep groove ball bearing 2; 9. Base; 10. Deep groove ball bearing 3; 11. Lens; 12. Camera movement; 13. Housing; 14. Linear guide rail assembly; 15. Bracket. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0044] The core of this invention is to provide a manual focusing device that can improve the adjustment resolution while reducing the difficulty of processing and assembling parts.

[0045] Another core aspect of this invention is to provide a dual-light handheld lens device that includes the aforementioned manual focusing device, featuring two integrated manual focusing mechanisms.

[0046] It should be noted that in this embodiment, the orientation or positional relationship indicated by "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the purpose of facilitating the description of this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0047] Please refer to Figure 1 and Figure 2 This application provides an embodiment of a manual focusing device, including a manual focusing mechanism, which includes a rotating mechanism and a lever mechanism.

[0048] The rotating mechanism includes a focusing wheel, a screw, a nut, and a pull rod. The focusing wheel is hollow inside. The screw is located inside the focusing wheel and connected to it. The nut is sleeved on the screw and connected to the pull rod, which is parallel to the screw. The bottom of the pull rod extends through the bottom of the opening of the focusing wheel.

[0049] The lever mechanism includes a support and a lever. The support is provided with the lever, which can rotate around it. The first end of the lever is connected to the bottom of the pull rod, and the second end of the lever is used to connect to the movement 12, which moves coaxially relative to the lens 11. The straight-line distance from the first end of the lever to the support is greater than the straight-line distance from the second end of the lever to the support.

[0050] It should be noted that the manual focusing mechanism is used in dual-beam handheld lens devices, which, in addition to the manual focusing mechanism, also include a lens assembly, such as... Figure 4 or Figure 5 As shown, the lens assembly includes a lens 11 and a movement 12. The movement 12 is located behind the lens 11, and the movement 12 and the lens 11 are arranged along axis two. The movement 12 is movable relative to the lens 11 along axis two. When the manual focusing mechanism is installed and used, the lever is arranged along the axis parallel to the lens 11, that is, the lever is arranged in the direction parallel to axis two. This ensures that the lever drives the movement 12 to move along axis two through the lever, and avoids the movement 12 deviating from the lens 11 when it moves, which would affect the image quality.

[0051] The following describes the specific process of manual focusing mechanism in achieving focusing, taking the vertical direction of axis two as an example: The user rotates the focusing wheel, which drives the screw to rotate. The rotational motion of the screw is converted into the linear movement of the nut. The nut drives the pull rod to move up and down. The up and down movement of the pull rod causes the first end of the lever to swing up and down around the support. The swinging motion of the second end of the pull rod around the support can drive the movement mechanism 12 to move up and down, thereby adjusting the distance between the movement mechanism 12 and the lens 11, that is, achieving focusing of the lens 11.

[0052] It should be noted that the straight-line distance from the first end of the lever to the support (L1) is greater than the straight-line distance from the second end of the lever to the support (L2). For example, L1 = 2L2. The first end of the lever is the effort end, and the second end of the lever is the resistance end. Obviously, the lever is a force-saving lever. According to the lever balance condition, the longer the effort arm, the more effort is saved, but the more distance the lever needs to move to drive the lever at the effort end. That is, the amount of movement of the effort end is greater than the amount of movement of the resistance end. In other words, the amount of movement of the lever is greater than the amount of movement of the mechanism 12.

[0053] Therefore, the manual focusing mechanism in the above embodiment does not require the machining of screws and threads with precision threads. By controlling the power arm of the lever to be longer than the resistance arm, the small-pitch stepping of the movement 12 can be achieved, thereby accurately controlling the distance between the movement 12 and the lens 11, improving the adjustment resolution, and reducing the difficulty of machining and assembling parts.

[0054] Dual-light handheld lens devices refer to portable observation devices that simultaneously possess visible light and infrared imaging capabilities, such as... Figure 1As shown, it has a visible light lens assembly 02 and an infrared lens assembly 03, and is mainly used in fields such as night reconnaissance and environmental monitoring. In existing manual focusing technology, the manual focusing mechanism is independently installed on each lens assembly, which disrupts the product's appearance and is detrimental to the design.

[0055] To address the aforementioned problems, as a further preferred option based on the above embodiments, please refer to... Figure 1 , Figure 2 and Figure 3 The manual focusing mechanism is configured as two separate mechanisms: a first manual focusing mechanism and a second manual focusing mechanism. Specifically, the first manual focusing mechanism includes a first rotating mechanism 1 and a first lever mechanism 2. The first rotating mechanism 1 includes a first focusing wheel 1-1, a first screw 1-2, a first nut 1-3, and a first pull rod 1-4. The first lever mechanism 2 includes a first support 2-1 and a first lever 2-2. The second manual focusing mechanism includes a second rotating mechanism 3 and a second lever mechanism 4. The second rotating mechanism 3 includes a second focusing wheel 3-1, a second screw 3-2, a second nut 3-3, and a second pull rod 3-4. The second lever mechanism 4 includes a second support 4-1 and a second lever 4-2. Both the first and second manual focusing mechanisms adopt the manual focusing mechanism technical solution described in the above embodiment. To achieve an integrated design of the first and second manual focusing mechanisms, the components of both are configured as follows:

[0056] The first focusing wheel 1-1 and the second focusing wheel 3-1 are arranged adjacent to each other along a coaxial line, which is parallel to the second axis. For example, the first focusing wheel 1-1 and the second focusing wheel 3-1 are arranged from top to bottom and are adjacent to each other.

[0057] The first screw 1-2 is coaxially disposed inside the first focusing wheel 1-1 and extends through the bottom opening of the first focusing wheel 1-1 to form a connecting part. The second screw 3-2 is coaxially disposed inside the second focusing wheel 3-1 and has a central hole. The connecting part passes through the through hole 2 at the top of the second focusing wheel 3-1, is inserted into the central hole, and extends to the bottom of the second focusing wheel 3-1. The connecting part is clearance-fitted with the central hole, and the top of the second focusing wheel 3-1 is provided with a deep groove ball bearing 7 sleeved on the first screw 1-2.

[0058] The first screw 1-2 is the reference for the entire assembly. The first screw 1-2 is connected to the first focusing wheel 1-1 and can rotate with it. The second screw 3-2 is connected to the second focusing wheel 3-1 and can rotate with it. The second screw 3-2 is sleeved on the connecting part of the first screw 1-2 with a gap between them, so that the rotation of the second screw 3-2 and the first screw 1-2 does not interfere with each other. Furthermore, the outer ring of the deep groove ball bearing 7 is connected to the top of the second focusing wheel 3-1, and the inner ring of the deep groove ball bearing 7 is sleeved on the first screw 1-2, so that the second screw 3-2 is fixedly connected to the first screw 1-2. That is, the first focusing wheel 1-1 assembly (including the first focusing wheel 1-1 and the first screw 1-2 and their components) and the second focusing wheel 3-1 assembly (including the second focusing wheel 3-1 and the second screw 3-2 and their components) are connected together. Furthermore, since the seat ring and shaft ring of the thrust ball bearing do not rotate together, the first screw 1-2 and the second screw 3-2 can rotate independently, ensuring that the first focusing wheel 1-1 assembly and the second focusing wheel 3-1 assembly do not interfere with each other, thereby enabling independent focusing of the visible light lens 11 and the infrared lens 11.

[0059] It should also be noted that the center lines of the first focusing wheel 1-1, the first screw 1-2, the second focusing wheel 3-1, and the second screw 3-2 are all set along the same axis, that is, the four are set coaxially. The coaxial design can minimize the impact of processing errors or installation deviations on the overall structure.

[0060] The first nut 1-3 is sleeved on the connecting part between the thrust ball bearing 5 and the bottom end of the second focusing wheel 3-1. The first nut 1-3 is connected to the first pull rod 1-4 located on one side of the connecting part. The first pull rod 1-4 extends out of the bottom end of the opening of the second focusing wheel 3-1 in a direction parallel to the first axis.

[0061] Therefore, taking the vertical axis as an example, the first focusing wheel 1-1 drives the first screw 1-2 to rotate, the first nut 1-3 moves up and down along the first screw 1-2, and the first nut 1-3 drives the first pull rod 1-4 to move up and down. Further, the first pull rod 1-4 extends from the bottom of the opening of the second focusing wheel 3-1 and connects to the first end of the first lever 2-2. The second end of the first lever 2-2 connects to the movement 12 in the visible light lens assembly 02. The first lever 2-2 is mounted on the first support 2-1 and rotates around it. Thus, the first pull rod 1-4, through the first lever 2-2, can drive the movement 12 in the visible light lens assembly 02 to move up and down, thereby achieving focusing of the visible light lens 11.

[0062] The second nut 3-3 is sleeved on the second screw 3-2. The second nut 3-3 is connected to the second pull rod 3-4 located on the other side of the connecting part. The second pull rod 3-4 extends out of the bottom end of the opening of the second focusing wheel 3-1 in a direction parallel to axis 1.

[0063] Similarly, the second focusing wheel 3-1 drives the second screw 3-2 to rotate, and the second nut 3-3 moves up and down along the second screw 3-2. The second nut 3-3 drives the second pull rod 3-4 to move up and down. Further, the second pull rod 3-4 extends out of the opening bottom of the second focusing wheel 3-1 and connects to the first end of the second lever 4-2. The second end of the second lever 4-2 is connected to the movement 12 in the infrared lens device 03. The second lever 4-2 is mounted on the second support 4-1 and rotates around it. In this way, the second pull rod 3-4 can drive the movement 12 in the infrared lens device 03 to move up and down through the second lever 4-2, thereby realizing the focusing of the infrared lens 11.

[0064] In summary, the manual focusing device 01 provided in the above embodiments has two integrated manual focusing mechanisms, and the placement of the manual focusing device 01 can be adjusted according to the product requirements to meet the appearance requirements of different products.

[0065] In one specific embodiment, the first pull rod 1-4 and the first nut 1-3 are fixedly locked together by screws, and the second pull rod 3-4 and the second nut 3-3 can also be fixedly locked together by screws.

[0066] Based on the above embodiments, as a further preferred option, please refer to... Figure 3 A thrust ball bearing 5 is fitted on the connecting part at the bottom end of the second screw 3-2, and a thrust ball bearing 6 is fitted on the rod body of the second screw 3-2 near its top end.

[0067] The shaft ring of thrust ball bearing 5 is sleeved with the connecting part, and the seat ring of thrust ball bearing 5 is connected to the bottom end of the second screw 3-2. Since the shaft ring and seat ring of thrust ball bearing 5 do not rotate relative to each other, thrust ball bearing 5 can prevent the rotation of the second screw 3-2 and the first screw 1-2 from interfering with each other, and it can also limit the downward movement of the second nut 3-3 to prevent the thread from seizing after reaching the limit. In addition, thrust ball bearing 6 limits the upward movement of the second nut 3-3 to prevent the thread from seizing after reaching the limit.

[0068] Therefore, the thrust ball bearing 5 and the thrust ball bearing 6 work together to limit the travel of the first nut 1-3, ensuring that the travel of the first nut 1-3 does not exceed the safe range to prevent excessive compression or deformation.

[0069] Based on the above embodiments, as a further preferred option, please refer to... Figure 3 The top of the second focusing wheel 3-1 is provided with a boss 3-5 with a second through hole in the middle. The boss 3-5 extends into the bottom of the first focusing wheel 1-1. One end face of the boss 3-5 is recessed with a groove surrounding the second through hole. The second screw 3-2 is located in the groove and the center hole is aligned with the second through hole, so that the first screw 1-2 in the first focusing wheel 1-1 can pass through the second through hole and be inserted into the center hole.

[0070] The above configuration allows the second focusing wheel 3-1 to extend part of the second screw 3-2 into the first focusing wheel 1-1 using the boss 3-5, making the overall component structure more compact, saving space, and suitable for small-volume dual-light handheld lens devices.

[0071] In one specific embodiment, please refer to Figure 3 The boss 3-5 has at least two screw holes along its radial direction. The screw holes are connected to the groove. The screw passes through the screw hole and is inserted into the groove to fix and lock the second screw 3-2.

[0072] Based on the above embodiments, as a further preferred embodiment, the other end face of the boss 3-5 is provided with an annular protrusion 3-6 surrounding the second through hole, and a deep groove ball bearing 7 is provided between the annular protrusion 3-6 and the first screw 1-2.

[0073] In other words, the inner ring of the deep groove ball bearing 7 is connected to the outer wall of the first screw 1-2, and the outer ring of the deep groove ball bearing 7 is connected to the inner wall of the annular protrusion 3-6. On the one hand, there are balls between the inner and outer rings of the deep groove ball bearing 7, and the rotation of the inner and outer rings will not interfere with each other, ensuring that the first focusing wheel 1-1 assembly and the second focusing wheel 3-1 assembly do not interfere with each other, thereby realizing independent focusing of the visible light lens device 02 and the infrared lens device 03; on the other hand, the deep groove ball bearing 7 has an automatic self-aligning capability, ensuring that the first screw 1-2 and the second screw 3-2 are coaxially set, that is, ensuring that the first focusing wheel 1-1 and the second focusing wheel 3-1 are coaxial, reducing the impact of processing errors or installation deviations on the overall structure.

[0074] Based on the above embodiments, as a further preferred option, please refer to... Figure 3 The top of the first screw 1-2 passes through a through hole at the top of the first focusing wheel 1-1 and is secured by a locking nut. A deep groove ball bearing 8 is fitted onto the top of the first screw 1-2. This arrangement secures the first screw 1-2 to the first focusing wheel 1-1. Simultaneously, the top of the first screw 1-2 extends beyond the first focusing wheel 1-1, and the deep groove ball bearing 8 ensures coaxiality during assembly with the housing 13.

[0075] Based on the above embodiments, as a further preferred option, please refer to... Figure 3 This application also includes a base 9, on which an opening 1, an opening 2 and an opening 3 located between the two are provided.

[0076] The connecting part is inserted into the opening three, and a deep groove ball bearing three 10 is provided between them. The base 9 supports the first screw 1-2 and the components connected to it, and allows the first screw 1-2 to be rotatably set relative to the base 9, thereby eliminating the rotational freedom of the base 9 over the first screw 1-2. The bottom end of the opening of the second focusing wheel 3-1 is set in the annular groove at the top of the base 9 through a bearing. The base 9 supports the second focusing wheel 3-1 and the components connected to it, and allows the second focusing wheel 3-1 to be rotatably set relative to the base 9, thereby eliminating the rotational freedom of the base 9 over the second focusing wheel 3-1. In other words, the main function of the base 9 for the first focusing wheel 1-1 assembly and the second focusing wheel 3-1 assembly is to provide support, fixation, and distribute the force, ensuring the stable operation of the first focusing wheel 1-1 assembly and the second focusing wheel 3-1 assembly.

[0077] Furthermore, the first pull rod 1-4 passes through the opening and is fitted with a clearance therebetween, allowing the first pull rod 1-4 to extend and connect to the first lever 2-2, thereby driving the movement of the mechanism 12 in the visible light lens device 02 up and down, thus enabling the visible light lens 11 to focus. The second pull rod 3-4 passes through the opening and is fitted with a clearance therebetween, allowing the second pull rod 3-4 to extend and connect to the second lever 4-2, thereby driving the movement of the mechanism 12 in the infrared lens device 03 up and down, thus enabling the infrared lens 11 to focus.

[0078] Preferably, the third opening is located at the center of the base 9, and the annular groove is arranged around the circumference of the third opening, so that the center of the annular groove and the center of the third opening are on the same axis, so that the first focusing wheel 1-1, the second focusing wheel 3-1 and the base 9 are coaxially arranged, and the base 9 can balance the axial and radial forces and avoid the deformation of the component due to the off-center load.

[0079] Based on the above embodiments, as a further preferred embodiment, both the outer peripheral walls of the first focusing wheel 1-1 and the second focusing wheel 3-1 are provided with anti-slip textures. These anti-slip textures can increase the friction between the user's fingers and the focusing wheels, making it easier for the user to precisely rotate and adjust.

[0080] In addition to the aforementioned manual focusing device 01, please refer to Figure 1 , Figure 4 and Figure 5 This utility model also provides a dual-light handheld lens device, including the manual focusing device 01 disclosed in the above embodiments and two lens devices. The two lens devices are a visible light lens device 02 and an infrared lens device 03. Each lens device includes a lens 11 and a mechanism 12. The mechanism 12 is located behind the lens 11 and both are arranged along axis 2. The mechanism 12 is movable relative to the lens 11 along axis 2, which is parallel to axis 1. Since the pull rod is parallel to the screw, and the screw is arranged along axis 1, the movement of the pull rod along axis 1 can drive the mechanism 12 to move relative to the lens 11 along axis 2 via a lever, thereby achieving focusing.

[0081] In the visible light lens device 02, the mechanism 12 is connected to the first pull rod 1-4 through the first lever mechanism 2 to achieve focusing of the visible light lens 11. In the infrared lens device 03, the mechanism 12 is connected to the second pull rod 3-4 through another lever mechanism to achieve focusing of the infrared lens 11.

[0082] Furthermore, the housing 13 of the lens 11 is provided with a linear guide rail assembly 14 extending in the direction of parallel axis 2, and the mechanism 12 is mounted on the linear guide rail assembly 14 via a bracket 15.

[0083] The housing 13 of the lens 11 is provided with a linear guide rail extending in the direction of parallel axis 2, and the bracket 15 of the mechanism 12 is provided with a slide bar that is slidably connected to the linear guide rail.

[0084] Specifically, the lens 11 is generally mounted at the front end of the housing 13, and the camera module 12 is mounted inside the housing 13 via a bracket 15 and positioned behind the lens 11. A linear guide rail assembly 14 is provided on the inner wall of the housing 13. The linear guide rail assembly 14 extends along a direction parallel to the second axis. The linear guide rail assembly 14 has a fixed part and a sliding part that slides relative to it. The sliding part connects to the bracket 15, allowing the bracket 15 to move along the linear guide rail assembly 14. Thus, when the camera module 12 is driven by the second end of the lever, the bracket 15 drives the camera module 12 to move along the linear guide rail, ensuring that the camera module 12 moves along the second axis and effectively preventing the camera module 12 from deviating from the lens 11 during movement, thereby affecting image quality.

[0085] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0086] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0087] The present invention provides a detailed description of a dual-light handheld lens device and its manual focusing mechanism. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of these embodiments are merely illustrative of the method and core concepts of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A manual focusing device (01), characterized in that, Includes a manual focusing mechanism, wherein the manual focusing mechanism includes: The rotating mechanism includes a focusing wheel, a screw, a nut, and a pull rod. The focusing wheel is hollow inside. The screw is located inside the focusing wheel and connected to it. The nut is sleeved on the screw and connected to the pull rod, which is parallel to the screw. The bottom of the pull rod extends through the bottom of the opening of the focusing wheel. The lever mechanism includes a support and a lever, the support having the lever rotatable therearound, a first end of the lever being connected to the bottom of the pull rod, a second end of the lever being used to connect to a movement (12) that moves coaxially relative to the lens (11), and the straight-line distance from the first end of the lever to the support being greater than the straight-line distance from the second end of the lever to the support.

2. The manual focusing device (01) according to claim 1, characterized in that, The manual focusing mechanism is configured as two parts, namely a first manual focusing mechanism and a second manual focusing mechanism. The first focusing wheel (1-1) and the second focusing wheel (3-1) are arranged adjacent to each other along the axis. The first screw (1-2) is coaxially disposed inside the first focusing wheel (1-1) and extends through the bottom opening of the first focusing wheel (1-1) to form a connecting part. The second screw (3-2) is coaxially disposed inside the second focusing wheel (3-1) and has a central hole. The connecting part passes through the second through hole at the top of the second focusing wheel (3-1), is inserted into the central hole, and extends to the bottom of the second focusing wheel (3-1). The connecting part is clearance-fitted with the central hole. The top of the second focusing wheel (3-1) is provided with a deep groove ball bearing (7) sleeved on the first screw (1-2). The connecting part is fitted with a thrust ball bearing (5) located at the bottom end of the second screw (3-2). A first nut (1-3) is fitted on the connecting part between the thrust ball bearing (5) and the bottom end of the second focusing wheel (3-1). The first nut (1-3) is connected to a first pull rod (1-4) located on one side of the connecting part. The first pull rod (1-4) extends out of the bottom end of the opening of the second focusing wheel (3-1) in a direction parallel to the first axis. The second nut (3-3) is sleeved on the second screw (3-2), and the second nut (3-3) is connected to the second pull rod (3-4) located on the other side of the connecting part. The second pull rod (3-4) extends out of the bottom end of the opening of the second focusing wheel (3-1) in a direction parallel to the first axis.

3. The manual focusing device (01) according to claim 2, characterized in that, The second screw (3-2) is fitted with a thrust ball bearing (6) on the rod body near its top end.

4. The manual focusing device (01) according to claim 2, characterized in that, The top of the second focusing wheel (3-1) is provided with a boss (3-5) with the second through hole in the middle. The boss (3-5) extends into the bottom of the first focusing wheel (1-1). One end face of the boss (3-5) is recessed with a groove surrounding the second through hole. The second screw (3-2) is located in the groove and the center hole is aligned with the second through hole.

5. The manual focusing device (01) according to claim 4, characterized in that, The other end face of the boss (3-5) is provided with an annular protrusion (3-6) surrounding the second through hole, and the deep groove ball bearing (7) is located between the annular protrusion (3-6) and the first screw (1-2).

6. The manual focusing device (01) according to claim 2, characterized in that, The top of the first screw (1-2) passes through the through hole at the top of the first focusing wheel (1-1) and is fastened by a locking nut, and the top of the first screw (1-2) is fitted with a deep groove ball bearing (8).

7. The manual focusing device (01) according to claim 2, characterized in that, It also includes a base (9), on which there are opening one, opening two and opening three located between the two, the connecting part is inserted into opening three and a deep groove ball bearing three (10) is provided between the two, the bottom end of the opening of the second focusing wheel (3-1) is provided in the annular groove at the top of the base (9) through the bearing, the first pull rod (1-4) passes through opening one and is clearance-fitted with it, and the second pull rod (3-4) passes through opening two and is clearance-fitted with it.

8. The manual focusing device (01) according to any one of claims 2 to 7, characterized in that, The outer peripheral walls of the first focusing wheel (1-1) and the second focusing wheel (3-1) are both provided with anti-slip textures.

9. A dual-light handheld lens device, characterized in that, The device includes a manual focusing device (01) as described in any one of claims 2 to 8 and two lens devices, each of the lens devices including a lens (11) and a mechanism (12), the mechanism (12) being disposed behind the lens (11) and both being arranged along axis two, the mechanism (12) being movable relative to the lens (11) along axis two, the axis two being parallel to axis one; The movement (12) in one of the lens devices is connected to the first lever (1-4) via a lever mechanism, and the movement (12) in another lens device is connected to the second lever (3-4) via another lever mechanism.

10. The dual-light handheld lens device according to claim 9, characterized in that, The lens (11) housing (13) is provided with a linear guide rail assembly (14) extending in a direction parallel to the second axis, and the mechanism (12) is mounted on the linear guide rail assembly (14) via a bracket (15).

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