Electric infrared lens with novel focusing mode

Abstract

The utility model discloses an electric infrared lens with a novel focusing mode, which relates to the technical field of infrared imaging and comprises a main lens cone, a movable lens cone and a focusing mechanism. The movable lens cone is slidably installed in the main lens cone along the central axis of the main lens cone, and the central axis of the movable lens cone coincides with the central axis of the main lens cone. The focusing mechanism comprises a driving motor, a driving gear and a driven gear; the driven gear is rotationally mounted at the rear end of the main lens cone and is coaxially arranged with the main lens cone; the driven gear is annular, and an internal thread structure is arranged on the wall surface of an inner hole of the driven gear; the movable lens barrel movably extends into an inner hole of the driven gear, and an external thread structure in threaded connection with the internal thread structure is arranged on the peripheral wall surface of the movable lens barrel; the driving motor is mounted on the peripheral wall surface of the main lens barrel, and an output shaft of the driving motor is connected with the driving gear and used for driving the driving gear to rotate; the driving gear is meshed with the driven gear. The technical problems that an existing infrared lens focusing mode is complex in structure and high in manufacturing cost are solved.

Description

Technical Field

[0001] This application relates to the field of infrared imaging technology, and particularly to an electric infrared lens with a new focusing method. Background Art

[0002] With the development of science and technology, infrared imaging technology has been widely used in the fields of national defense, industry, medical treatment, etc. As an important part of the infrared imaging system, the infrared focusing lens can flexibly adjust the focal length to meet the imaging needs of the detector, so it is widely used. The existing focusing method of the electric infrared focusing lens is generally that the pin moves in the spiral groove on the electric lens, thereby driving the moving lens barrel inside the electric lens to focus. For example, a dual-field electric focusing infrared lens and an imaging device disclosed in a Chinese patent with the patent number CN114236794A. However, this focusing method has a relatively complex structure and a high manufacturing cost. Utility Model Content

[0003] In view of this, the purpose of this application is to provide an electric infrared lens with a new focusing method to solve the technical problems of the existing infrared lens focusing method, such as complex structure and high manufacturing cost.

[0004] To achieve the above technical purpose, this application provides an electric infrared lens with a new focusing method, including a main lens barrel, a moving lens barrel, and a focusing mechanism;

[0005] The moving lens barrel is slidably installed in the main lens barrel along the central axis of the main lens barrel, and its central axis coincides with the central axis of the main lens barrel;

[0006] The focusing mechanism includes a driving motor, a driving gear, and a driven gear;

[0007] The driven gear is rotatably installed at the rear end of the main lens barrel and is coaxially arranged with the main lens barrel;

[0008] The driven gear is annular, and an internal thread structure is provided on the wall surface of its inner hole;

[0009] The moving lens barrel extends into the inner hole of the driven gear, and an external thread structure is provided on its outer peripheral wall surface, which is threadedly connected to the internal thread structure;

[0010] The driving motor is installed on the outer peripheral wall surface of the main lens barrel, and its output shaft is connected to the driving gear to drive the driving gear to rotate;

[0011] The driving gear meshes with the driven gear.

[0012] Further, a limiting through groove penetrating through itself is provided on the outer peripheral wall surface of the main lens barrel along its central axis;

[0013] A limit pin which extends into the limit through groove and is in sliding fit with the limit through groove is detachably mounted on the outer peripheral wall surface of the moving lens barrel.

[0014] Further, two trigger switches are further included;

[0015] The two trigger switches are mounted on the outer peripheral wall surface of the main lens barrel at both ends of the limit through groove;

[0016] One end of the limit pin away from the moving lens barrel extends out of the limit through groove;

[0017] The nail section of the limit pin extending out of the limit through groove can contact the trigger switch to trigger the trigger switch;

[0018] The trigger switch is electrically connected to the drive motor and is used to control the drive motor to cut off power when triggered by the limit pin.

[0019] Further, the trigger switch is a micro switch.

[0020] Further, the drive motor is a servo motor and is fixed on the outer peripheral wall surface of the main lens barrel through a motor bracket.

[0021] Further, a mounting plane is cut on the outer peripheral wall surface of the main lens barrel;

[0022] The drive motor is mounted on the mounting plane.

[0023] Further, the limit through groove is opened on the mounting plane.

[0024] Further, a protective cover is further included;

[0025] The protective cover is covered on the mounting plane.

[0026] Further, a rear lens mount is further included;

[0027] The rear lens mount is covered on the rear end of the main lens barrel to close the rear end of the main lens barrel.

[0028] Further, the rear lens mount is detachably connected to the rear end of the main lens barrel through screws.

[0029] As can be seen from the above technical solution, for the electric infrared lens with the novel focusing method designed in this application, a driving motor drives the driving gear to rotate, and the meshing between the driving gear and the driven gear is utilized to synchronously drive the driven gear to rotate. Since the moving lens barrel can only move along the central axis of the main lens barrel, when the driven gear rotates, the threaded engagement between the driven gear and the moving gear can convert the rotational motion into the linear motion of the moving lens barrel, thereby driving the moving lens barrel to move along the central axis of the main lens barrel to complete focusing. Compared with the traditional focusing method, the mating structure between the threads is simple and compact, and the assembly is convenient. This not only helps to reduce the overall size and make it more convenient to carry, but also helps to reduce the manufacturing cost. Moreover, during the adjustment process, the moving lens barrel can be kept coaxial with the main lens barrel to ensure the stability of the optical axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0031] Figure 1 It is the first cross-sectional view of an electric infrared lens with a novel focusing method provided in the present application;

[0032] Figure 2 It is the second cross-sectional view of an electric infrared lens with a novel focusing method provided in the present application;

[0033] Figure 3 It is the three-dimensional view of an electric infrared lens with a novel focusing method provided in the present application;

[0034] In the figure: 1, main lens barrel; 11, avoidance hole; 12, limit through groove; 13, mounting plane; 2, moving lens barrel; 21, lens; 22, retaining ring; 23, limit pin; 31, driving motor; 311, motor bracket; 32, driving gear; 321, positioning pin; 33, driven gear; 4, rear lens mount; 5, protective cover; 6, trigger switch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The following will clearly and completely describe the technical solutions of the embodiments of the present application with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the embodiments of the present application.

[0036] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a replaceable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0038] The embodiments of the present application disclose an electric infrared lens with a novel focusing method.

[0039] Please refer to Figure 1 and Figure 3 One embodiment of an electric infrared lens with a novel focusing method provided in the embodiments of the present application includes:

[0040] A main lens barrel 1, a moving lens barrel 2, and a focusing mechanism.

[0041] The moving lens barrel 2 is slidably installed in the main lens barrel 1 along the central axis of the main lens barrel 1, and its central axis coincides with the central axis of the main lens barrel 1. Among them, a lens 21 and a retaining ring 22 for fixing the lens 21 are arranged inside the moving lens barrel 2. The internal lens 21 and the retaining ring 22 are prior art and will not be elaborated.

[0042] The focusing mechanism includes a driving motor 31, a driving gear 32, and a driven gear 33.

[0043] The driven gear 33 is rotatably installed inside the rear end of the main barrel 1 and is coaxially arranged with the main barrel 1; the driven gear 33 is annular, and an internal thread structure is provided on the wall surface of its inner hole; the moving barrel 2 movably extends into the inner hole of the driven gear 33, and an external thread structure threadedly connected to the internal thread structure is provided on its outer peripheral wall surface; the driving motor 31 is installed on the outer peripheral wall surface of the main barrel 1, and its output shaft is connected to the driving gear 32 for driving the driving gear 32 to rotate; the driving gear 32 meshes with the driven gear 33, and an avoidance hole 11 for avoiding the meshing of the driving gear 32 and the driven gear 33 is provided on the outer peripheral wall surface of the main barrel 1.

[0044] The electric infrared lens with the novel focusing method designed in the present application drives the driving gear 32 to rotate through the driving motor 31, and uses the meshing between the driving gear 32 and the driven gear 33 to synchronously drive the driven gear 33 to rotate; since the moving barrel 2 can only move along the central axis of the main barrel 1, when the driven gear 33 rotates, by using the threaded fit between the driven gear 33 and the moving gear, the rotational motion can be converted into the linear motion of the moving barrel 2, thereby driving the moving barrel 2 to move along the central axis of the main barrel 1 to complete the focusing. Compared with the traditional focusing method, the matching structure between the threads is simple and compact, and the assembly is convenient. It not only helps to reduce the overall size and make the carrying more convenient, but also helps to reduce the manufacturing cost; moreover, during the adjustment process, the moving barrel 2 can be kept coaxial with the main barrel 1 to ensure the stability of the optical axis.

[0045] The above is the first embodiment of the electric infrared lens with a novel focusing method provided by the present application. The following is the second embodiment of the electric infrared lens with a novel focusing method provided by the present application. For details, please refer to Figures 1 to 3 。

[0046] Based on the solution of the first embodiment above:

[0047] Further, as Figure 2 shown, a limiting through groove 12 penetrating through itself is provided on the outer peripheral wall surface of the main barrel 1 along its central axis; a limiting pin 23 extending into the limiting through groove 12 and slidably matched with the limiting through groove 12 is detachably installed on the outer peripheral wall surface of the moving barrel 2. By using the limiting sliding fit between the limiting pin 23 and the limiting through groove 12, it can be ensured that the moving barrel 2 only moves along the central axis direction of the main barrel 1 and cannot rotate; the limiting pin 23 is designed to be detachable, which is convenient for cooperating with the limiting through groove 12 and facilitates installation, disassembly and maintenance; the limiting pin 23 can specifically be a pin with a threaded connection head, and it is detachably connected to the moving barrel 2 by means of threaded connection, and no specific limitation is made.

[0048] Further, as Figure 2As shown in the figure, it further includes two trigger switches 6; the two trigger switches 6 are installed at both ends of the limiting through groove 12 on the outer peripheral wall surface of the main lens barrel 1; one end of the limiting pin 23 away from the moving lens barrel 2 extends out of the limiting through groove 12; the pin section of the limiting pin 23 extending out of the limiting through groove 12 can contact the trigger switch 6 to trigger the trigger switch 6; the trigger switch 6 is electrically connected to the driving motor 31 and is used to control the driving motor 31 to cut off power when triggered by the limiting pin 23.

[0049] When over-adjustment occurs, it will cause the limiting pin to directly hit the end of the limiting through groove 12. Since the limiting pin 23 stops moving due to being blocked by the end of the limiting through groove 12, while the moving lens barrel 2 continues to move, at this time, the connection between the moving lens barrel 2 and the limiting pin 23 will be damaged, causing the moving lens barrel 2 to break; in order to avoid the above situation in this application, a trigger switch 6 is additionally designed. When the limiting pin 23 touches the trigger switch 6, the trigger switch 6 is triggered and controls the driving motor 31 to cut off power, which can avoid excessive movement of the moving lens barrel 2 and improve the use safety.

[0050] Further, the trigger switch 6 can be a micro switch. The structure of the micro switch is usually relatively simple, with small volume and light weight, and is suitable for small-stroke control.

[0051] Further, the driving motor 31 is a servo motor, which is fixed on the outer peripheral wall surface of the main lens barrel 1 through the motor bracket 311. The servo motor has the functions of forward and reverse rotation and has the advantage of high control accuracy, and can achieve precise focusing control; regarding the motor bracket 311, its design changes according to the specific structure of the motor and is not limited.

[0052] In addition, a first positioning hole is provided on the output shaft of the driving motor 31; a second positioning hole communicating with its central hole is provided on the outer peripheral wall surface of the driving gear 32; the output shaft of the driving motor 31 is inserted into the central hole of the driving gear 32, and its first positioning hole is connected to the second positioning hole through the positioning pin 321.

[0053] Further, as Figure 1 and Figure 3 shown, since the main lens barrel 1 is cylindrical, in order to make the installation of the driving motor 31 on the main lens barrel 1 more convenient, an installation plane 13 is cut on the outer peripheral wall surface of the main lens barrel 1; the driving motor 31 is installed on the installation plane 13.

[0054] Further, as Figure 2 shown, in this application, the limiting through groove 12 is also opened on the installation plane 13, that is, the trigger switch 6, the driving motor 31, etc. are concentrated and installed together, and the structure is more compact.

[0055] Further, as Figure 1 and Figure 3As shown, the present application also designs a protective cover 5, which is covered on the installation plane 13 and can cover and protect the drive motor 31, the trigger switch 6, and the driving gear 32, not only improving the aesthetics but also preventing dust.

[0056] Furthermore, as Figure 1 and Figure 3 shown, it also includes a rear mirror base 4, which is covered on the rear end of the main mirror barrel 1 to close the rear end of the main mirror barrel 1, playing a certain protective role for the driven gear 33, and the driven gear 33 can also be fixed by using the rear mirror base 4. The driven gear 33 of the present application can be fixed to the main mirror barrel 1 through a bearing and is axially limited by the rear mirror base 4. Specifically, a bearing is sleeved on the non-tooth structure section of the driven gear 33, a step portion is provided inside the rear end of the main mirror barrel 1, the step portion is for the bearing to be snapped into, and can contact and abut against one side surface of the outer sleeve of the bearing, and after the rear mirror base 4 is installed, it contacts and abuts against the other side surface of the outer sleeve of the bearing to axially limit the bearing.

[0057] Furthermore, as Figure 1 shown, for the convenience of installation, disassembly and maintenance, the rear mirror base 4 is detachably connected to the rear end of the main mirror barrel 1 by screws.

[0058] The above has introduced in detail an electric infrared lens with a new focusing method provided by the present application. For those of ordinary skill in the art, according to the idea of the embodiments of the present application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. An electric infrared lens with a new focusing method, characterized in that, It includes a main lens barrel (1), a moving lens barrel (2) and a focusing mechanism; The moving lens barrel (2) is slidably mounted in the main lens barrel (1) along the central axis of the main lens barrel (1), and its central axis coincides with the central axis of the main lens barrel (1); The focusing mechanism includes a driving motor (31), a driving gear (32) and a driven gear (33); The driven gear (33) is rotatably mounted at the rear end of the main lens barrel (1) and is coaxially arranged with the main lens barrel (1); The driven gear (33) is annular, and an internal thread structure is provided on the wall surface of its inner hole; The moving lens barrel (2) extends into the inner hole of the driven gear (33) movably, and an external thread structure threadedly connected to the internal thread structure is provided on its outer peripheral wall surface; The driving motor (31) is mounted on the outer peripheral wall surface of the main lens barrel (1), and its output shaft is connected to the driving gear (32) for driving the driving gear (32) to rotate; The driving gear (32) meshes with the driven gear (33).

2. The electric infrared lens with a novel focusing method according to claim 1, characterized in that, A limiting through groove (12) penetrating through itself is formed on the outer peripheral wall surface of the main lens barrel (1) along its central axis; A limiting pin (23) extending into the limiting through groove (12) and slidably matched with the limiting through groove (12) is detachably mounted on the outer peripheral wall surface of the moving lens barrel (2).

3. The electric infrared lens with a novel focusing method according to claim 2, characterized in that, It further includes two trigger switches (6); The two trigger switches (6) are mounted on the outer peripheral wall surface of the main lens barrel (1) at both ends of the limiting through groove (12); One end of the limiting pin (23) away from the moving lens barrel (2) extends out of the limiting through groove (12); The nail section of the limiting pin (23) extending out of the limiting through groove (12) can contact the trigger switch (6) to trigger the trigger switch (6); The trigger switch (6) is electrically connected to the driving motor (31) and is used to control the driving motor (31) to cut off power when triggered by the limiting pin (23).

4. The electric infrared lens with a novel focusing method according to claim 3, characterized in that, The trigger switch (6) is a microswitch.

5. The electric infrared lens with a novel focusing method according to claim 2, characterized in that, The driving motor (31) is a servo motor and is fixed on the outer peripheral wall surface of the main lens barrel (1) through a motor bracket (311).

6. The electric infrared lens with a new focusing method according to claim 4, characterized in that, An installation plane (13) is cut on the outer peripheral wall surface of the main lens barrel (1); The driving motor (31) is mounted on the installation plane (13).

7. The electric infrared lens with a novel focusing method according to claim 6, characterized in that, The limiting through groove (12) is formed on the installation plane (13).

8. The electric infrared lens with a novel focusing method according to claim 7, characterized in that, It further includes a protective cover (5); The protective cover (5) is covered on the installation plane (13).

9. The electric infrared lens with a novel focusing method according to claim 1, characterized in that It further includes a rear lens mount (4); The rear lens mount (4) is covered on the rear end of the main lens barrel (1) to close the rear end of the main lens barrel (1).

10. The electric infrared lens with a novel focusing method according to claim 9, characterized in that, The rear lens mount (4) is detachably connected to the rear end of the main lens barrel (1) by screws.

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