Single-blade shutter structure and infrared lens

Abstract

The application discloses a single-blade shutter structure and an infrared lens. The shutter structure comprises a shell, a light hole is arranged on the outer side of the shell, a blade is rotatably arranged on the shell and used for opening and closing the light hole, a swing shaft is rotatably arranged on one end of the shell and swings within a preset angle range, and a connecting rod is rotatably arranged on the shell and is in transmission connection with the blade and the swing shaft. The swing shaft is used for generating driving force for rotating the connecting rod, the rotating connecting rod is used for driving the blade to rotate, and the action line of the driving force passes through the swing axis of the swing shaft at the position of opening and / or closing the light hole. The shutter structure can realize self-locking of the blade at the opening position and the closing position, and improves the shutter reliability under high impact.

Description

Technical Field

[0001] This application relates to the field of shutter technology, and in particular to a single-blade shutter structure and an infrared lens. Background Technology

[0002] Existing single-blade shutter structures typically use a U-shaped iron to drive a magnet to rotate, which in turn drives the blades to rotate via a pivot on the magnet, thereby opening and closing the light-transmitting aperture. However, in relatively complex operating conditions, such as when the shutter is used in a vehicle, it is susceptible to high impacts. Since existing shutters lack a self-locking mechanism, the shutter blades will vibrate significantly, causing the shutter to disengage from its original open or closed position, thus affecting the shutter's reliability.

[0003] Therefore, in view of the above-mentioned technical problems, how to make the blade self-locking in the open and closed positions is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this application is to provide a single-blade shutter structure and an infrared lens, which enables the blade to self-lock in both the open and closed positions, thereby improving shutter reliability under high-impact conditions.

[0005] To achieve the above objectives, this application provides a single-blade shutter structure, comprising:

[0006] A housing, wherein a light-transmitting hole is provided on the outer side of the housing;

[0007] The blade is rotatably mounted on the housing and is used to open and close the light-transmitting hole;

[0008] A pendulum shaft is rotatably mounted on the housing at one end, and the pendulum shaft swings within a preset angle range;

[0009] A connecting rod is rotatably mounted on the housing and drives the blades and the swing shaft;

[0010] The pendulum shaft is used to generate a force that drives the connecting rod to rotate. The rotating connecting rod is used to drive the blade to rotate. When the light-transmitting hole is opened and / or closed, the line of action of the force passes through the pendulum shaft.

[0011] Preferably, when the blade is in the position of opening and / or closing the light-transmitting hole, the line connecting the point of application of the connecting rod and the pendulum axis force to the oscillating axis is perpendicular to the connecting rod, so that the direction of the force applied by the pendulum axis to the connecting rod always points towards or away from the oscillating axis, thereby forming a static torque balance.

[0012] Preferably, the housing includes a base, the connecting rod has a second waist-shaped hole in the middle, and the end of the swing shaft away from the swing axis has a second pin. The second pin is movably disposed in the second waist-shaped hole to drive the connecting rod to rotate.

[0013] One end of the connecting rod is rotatably connected to the base, and the other end is provided with a first pin. The blade is provided with a first waist-shaped hole, and the first pin is movably disposed in the first waist-shaped hole to drive the blade to rotate.

[0014] Preferably, it further includes a driving member, which is disposed in a receiving groove of the base, the driving member comprising:

[0015] A U-shaped electromagnet, fixedly disposed in the receiving groove, includes a U-shaped iron core and a coil wound on the U-shaped arm of the U-shaped iron core, wherein the open end of the U-shaped iron core is magnetic;

[0016] A magnet is disposed inside the open end of the U-shaped iron core. The magnet has the same magnetic poles as the magnet of the U-shaped electromagnet and repels it, thereby driving the magnet to rotate. The magnet is fixedly connected to the pendulum shaft so that the pendulum shaft swings around the axis of the magnet.

[0017] Preferably, the receiving groove is provided with a first limiting part and a second limiting part, and the connecting rod or the swing shaft swings between the first limiting part and the second limiting part; when the light-transmitting hole is open, the connecting rod or the swing shaft is limited and abutted against the first limiting part; when the light-transmitting hole is closed, the connecting rod or the swing shaft is limited and abutted against the second limiting part.

[0018] Preferably, the housing further includes a cover plate, and the base has protrusions on both sides. The cover plate is fixed to the protrusions to form an accommodating space between the two protrusions, and the blade is disposed in the accommodating space.

[0019] Preferably, the cover plate is provided with an arc-shaped hole, and the first pin extends into the arc-shaped hole after passing through the first waist-shaped hole, and the first pin is slidably disposed in the arc-shaped hole.

[0020] Preferably, the blade has a columnar portion, the base has a columnar groove, the cover plate has a round hole, the two ends of the columnar portion are respectively inserted into the columnar groove and the round hole, and are rotatably arranged relative to the columnar groove and the round hole. A rotating shaft is provided in the columnar groove, the columnar portion is sleeved on the rotating shaft, and rotates about the axis of the rotating shaft.

[0021] Preferably, the accommodating space has an opening on the side near the light-transmitting hole, and the blade enters and exits the accommodating space through the opening, so that the blade can switch between a position where the light-transmitting hole is closed and a position where the light-transmitting hole is open.

[0022] Preferably, the blade, the connecting rod, and the swing shaft are arranged sequentially along the direction from the cover plate to the base.

[0023] An infrared lens, comprising:

[0024] Lens tube;

[0025] Several lenses are sequentially arranged inside the lens barrel along the axial direction of the lens barrel;

[0026] The shutter structure is the single-blade shutter structure described above, and the shutter structure is located between two adjacent lenses.

[0027] Compared to the aforementioned background technology, this application adds a connecting rod between the blade and the oscillating shaft. The connecting rod, acting as a transmission component between the blade and the oscillating shaft, converts the motion of the oscillating shaft into the motion of the blade, causing the blade to rotate on the housing to open and close the light-transmitting aperture. When the oscillating shaft rotates on the housing, its oscillating end generates a force that drives the connecting rod to rotate. The rotating connecting rod then drives the blade to rotate. It is foreseeable that while the oscillating shaft exerts a force on the connecting rod, the connecting rod also exerts a reaction force on the oscillating shaft. The action and reaction forces are equal in magnitude but opposite in direction. When the blade is driven by the connecting rod to the position of opening and / or closing the light-transmitting aperture, the line of action of the force exerted by the oscillating shaft on the connecting rod passes through the oscillating shaft of the oscillating shaft. Therefore, the line of action of the reaction force exerted by the connecting rod on the oscillating shaft also passes through the oscillating shaft of the oscillating shaft. At this point, if the blade tends to move due to impact, the vertical distance from the reaction force of the connecting rod on the oscillating shaft to the oscillating shaft is zero (i.e., the lever arm of the oscillating shaft is zero). Therefore, the connecting rod cannot drive the oscillating shaft to rotate in the reverse direction, and the blade cannot move, thus achieving self-locking of the blade. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0029] Figure 1 This is an exploded view of the single-blade shutter structure provided in the embodiments of this application;

[0030] Figure 2 This is a three-dimensional structural diagram of the single-blade shutter structure provided in the embodiments of this application;

[0031] Figure 3 This is a front view of the single-blade shutter structure provided in an embodiment of this application;

[0032] Figure 4A top view of the blade in the open position provided in an embodiment of this application;

[0033] Figure 5 A schematic diagram of the swing shaft and connecting rod when the blade is in the open position, as provided in an embodiment of this application;

[0034] Figure 6 A top view of the blade in the closed position provided in an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of the swing shaft and connecting rod when the blade is in the closed position, as provided in an embodiment of this application.

[0036] In the diagram: 1-base; 2-cover plate; 3-blade; 4-connecting rod; 5-swing shaft; 6-drive component; 7-rotating shaft;

[0037] 11-Accommodating groove; 12-First limiting part; 13-Second limiting part; 14-Columnar groove; 15-Protrusion; 16-Accommodating space;

[0038] 21-Arc-shaped hole; 22-Round hole;

[0039] 31-First oblong foramen; 32-Columnar portion;

[0040] 41-Second oblong hole; 42-First pin;

[0041] 51 - Second pin; 52 - Swing shaft;

[0042] 61-U-shaped iron core; 62-coil; 63-magnet. Detailed Implementation

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

[0044] It should be noted that in this embodiment, the orientation or positional relationship indicated by terms such as "upper," "lower," "front," and "rear" is based on the orientation or positional relationship shown in the accompanying drawings. It is used only for the convenience of describing this application and for simplifying the description, and does not 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. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] like Figure 1 As shown, in this embodiment, a single-blade shutter structure is provided. The shutter structure includes a housing, a blade 3, a pivot shaft 5, and a connecting rod 4. A light-transmitting hole is provided on the outer side of the housing. The blade 3 is rotatably mounted on the housing. By rotating the blade 3, the blade 3 blocks the light-transmitting hole, thereby closing the light-transmitting hole. Similarly, by rotating the blade 3, the blade 3 can be completely removed from the light-transmitting hole, thereby opening the light-transmitting hole.

[0047] It should be noted that since the blade 3 is rotatably mounted on the housing, while the light-transmitting hole is located outside the housing, when the light-transmitting hole is opened, the blade 3 can be kept overlapping with the housing in the axial direction of the light-transmitting hole, thereby minimizing the overall volume of the shutter structure; when the light-transmitting hole is closed, a part of the blade 3 can be rotated outside the housing and correspond to the position of the light-transmitting hole, thereby closing the light-transmitting hole.

[0048] One end of the swing shaft 5 is rotatably mounted inside the housing. The swing shaft 5 can swing within a preset angle range. It can be seen that one end of the swing shaft 5 is provided with a fixed swing shaft 52. The swing shaft 52 is parallel to the axis of the light-transmitting hole, and the swing shaft 52 can be located on the swing shaft 5 or outside the swing shaft 5. No further restrictions are imposed here. Within the swing range of the swing shaft 5, the blade 3 can be driven to rotate between the position of opening the light-transmitting hole and the position of closing the light-transmitting hole. In other words, when the swing shaft 5 swings to its limit position in the first direction, the blade 3 reaches the position of opening the light-transmitting hole; when the swing shaft 5 swings to its limit position in the opposite direction to the first direction, the blade 3 reaches the position of closing the light-transmitting hole.

[0049] Link 4 is rotatably mounted on the housing and serves to connect the blade 3 and the swing shaft 5. When the swing shaft 5 swings, it can push link 4 to rotate around a fixed axis. The rotating link 4 can then push the blade 3 to rotate around its axis, thereby causing the blade 3 to rotate in the positions of opening and closing the light-transmitting hole. It should be noted that during the rotation of the swing shaft 5, it can interfere with link 4, thereby generating a force that drives link 4 to rotate. That is, during the swing of the swing shaft 5, the movement path of its swing end will fall on a swing circle. Before the blade 3 reaches the position of opening or closing the light-transmitting hole, link 4 is located in a non-tangential position of the swing circle, thereby causing the swing shaft 5 to generate a force that drives link 4 to rotate. When the blade 3 reaches the position of opening or closing the light-transmitting hole, link 4 is located in a tangential position of the swing circle, and link 4 is perpendicular to the swing shaft 5, thereby causing the swing shaft 5 to exert a force on link 4 (such as...). Figure 5 and Figure 7 The line of action (extension) of F1 in the pendulum passes through the swing axis 52 of the pendulum axis 5.

[0050] It can be predicted that while the pendulum 5 exerts a force F1 on the connecting rod 4, the connecting rod 4 will also exert a reaction force on the pendulum 5 (such as...). Figure 5 and Figure 7 In the equation F2), the action force F1 and reaction force F2 are the same in magnitude but opposite in direction. When the blade 3 is driven by the connecting rod 4 to the position where the light-transmitting hole is open and / or closed, the line of action of the force F1 exerted by the pendulum shaft 5 on the connecting rod 4 will pass through the swing axis 52 of the pendulum shaft 5. Therefore, the line of action of the reaction force F2 exerted by the connecting rod 4 on the pendulum shaft 5 will also pass through the swing axis 52 of the pendulum shaft 5. At this time, if the blade 3 tends to move due to the impact, but since the vertical distance from the reaction force F2 exerted by the connecting rod 4 on the pendulum shaft 5 to the swing axis 52 of the pendulum shaft 5 is zero, that is, the lever arm of the pendulum shaft 5 is zero, the connecting rod 4 cannot drive the pendulum shaft 5 to rotate in the opposite direction, and the blade 3 cannot move, thus achieving the self-locking of the blade 3.

[0051] Furthermore, when the blade 3 is in the position of opening and / or closing the light-transmitting hole, the line connecting the point of application of the force of the connecting rod 4 and the pendulum shaft 5 and the swing shaft 52 is perpendicular to the connecting rod 4; therefore, when the connecting rod 4 applies a reaction force to the pendulum shaft 5, the reaction force is also perpendicular to the connecting rod 4, and the direction of the force always points to the swing shaft 52, thereby forming a static torque balance and realizing the self-locking of the blade 3 in the position of opening and / or closing the light-transmitting hole.

[0052] The housing includes a base 1, please refer to... Figure 1 The connecting rod 4 is rotatably mounted on the base 1, for example, by connecting the connecting rod 4 through a shaft hole. Considering that the single blade 3 needs to have a large rotation angle when opening and closing the light-transmitting hole, one end of the connecting rod 4 can be rotatably connected to the base 1. A first pin 42 is provided at the other end of the connecting rod 4, and a first waist-shaped hole 31 is provided on the blade 3. The first pin 42 is movably mounted in the first waist-shaped hole 31, thereby driving the blade 3 to rotate. At the same time, a second waist-shaped hole 41 is provided in the middle of the connecting rod 4, and a second pin 51 is provided at the end of the swing shaft 5 away from the swing shaft 52. The second pin 51 is movably mounted in the second waist-shaped hole 41, thereby driving the connecting rod 4 to rotate.

[0053] It should be noted that since the connection between the pendulum shaft 5 and the connecting rod 4 is located in the middle of the connecting rod 4, and the connecting rod 4 rotates around one end, the other end of the connecting rod 4 with the first pin 42 will have a large range of motion when the pendulum shaft 5 swings, so that the blade 3 can obtain a larger rotation angle to meet the requirement of opening or closing the light passage of a single blade 3.

[0054] Furthermore, the first oblong hole 31 provides a certain amount of movement space in its length direction, allowing the first pin 42 to move in the length direction of the first oblong hole 31 during the rotation of the connecting rod 4, thereby meeting the requirement of the connecting rod 4 driving the blade 3 to rotate. Similarly, the second oblong hole 41 can be configured in the same way as the first oblong hole 31, allowing the second pin 51 to move in the length direction of the second oblong hole 41, thereby meeting the requirement of the swing shaft 5 driving the connecting rod 4 to rotate. Further, to ensure the stability of the connection between the swing shaft 5 and the connecting rod 4, and between the connecting rod 4 and the blade 3, the outer wall of the second pin 51 can abut against the outer wall of the second oblong hole 41 in the width direction, and similarly, the outer wall of the first pin 42 can abut against the outer wall of the first oblong hole 31 in the width direction, thereby preventing relative movement between the pin and the oblong hole in the width direction of the oblong hole, ensuring a stable connection between the pin and the oblong hole.

[0055] The shutter structure also includes a drive component 6, please refer to... Figure 1 The driving component 6 is placed in the receiving groove 11 of the base 1, which can reduce the overall volume of the shutter structure. The driving component 6 includes a U-shaped electromagnet and a magnet 63. The U-shaped electromagnet is fixedly installed in the receiving groove. The U-shaped electromagnet includes a U-shaped iron core 61 and a coil 62 wound on the U-shaped arm of the U-shaped iron core 61. When the coil 62 is energized, it will generate magnetism at the open end of the U-shaped iron core 61. If a reverse current is applied to the coil 62, the opposite magnetism will be generated at the open end of the U-shaped iron core 61. If the coil 62 is de-energized, the open end of the U-shaped core will not be magnetic.

[0056] Magnet 63 is located inside the open end of the U-shaped iron core 61. Magnet 63 itself is magnetic, and the magnetism of magnet 63 and the magnetism of the U-shaped electromagnet are like poles and repel each other, thereby driving magnet 63 to rotate. By changing the direction of current flow in coil 62, bidirectional rotation of magnet 63 can be achieved. The principle of the U-shaped electromagnet driving the rotation of magnet 63 can also refer to existing technology, and will not be elaborated here.

[0057] Furthermore, the magnet 63 is fixedly connected to the pendulum shaft 5, thereby enabling the pendulum shaft 5 to swing around the axis of the magnet 63. Based on the bidirectional rotation of the magnet 63, the pendulum shaft 5 can swing within a preset angle range. Specifically, a first central hole can be opened in the middle of the magnet 63, the pendulum shaft 5 is located on the upper side of the magnet 63, and a column extending into the first central hole and fixedly connected to the magnet 63 is provided on the pendulum shaft 5. It can be fixed by means of adhesive, screw connection, etc. The column is provided with a second central hole, and a pin can be provided on the base 1 to cooperate with the second central hole, so that the magnet 63 and the pendulum shaft 5 have a stable axis on the base 1.

[0058] In addition, a first limiting part 12 and a second limiting part 13 are provided on the receiving groove 11. Please refer to Figure 1The connecting rod 4 or the swing shaft 5 swings between the first limiting part 12 and the second limiting part 13. The first limiting part 12 and the second limiting part 13 can be limiting grooves opened in the groove wall of the receiving groove 11. When the blade 3 reaches the position of opening the light hole, the connecting rod 4 or the swing shaft 5 abuts against the groove wall of the first limiting part 12, thereby preventing the connecting rod 4 or the swing shaft 5 from rotating too much. Similarly, when the blade 3 reaches the position of closing the light hole, the connecting rod 4 or the swing shaft 5 abuts against the groove wall of the second limiting part 13.

[0059] Please refer to Figures 1 to 3 The housing also includes a cover plate 2, and protrusions 15 are provided on both sides of the base 1. The cover plate 2 can be fixed to the protrusions 15 by bolts, thereby forming an accommodating space 16 between the two protrusions 15. The accommodating space 16 is located above the accommodating groove 11, and the blade 3 can be disposed in the accommodating space 16.

[0060] An arc-shaped hole 21 is provided on the cover plate 2. Please refer to... Figure 1 and Figure 2 The first pin 42 can pass through the first waist-shaped hole 31 and the arc-shaped hole 21 in sequence, and the first pin 42 can reciprocate within the arc range of the arc-shaped hole 21; when the connecting rod 4 rotates, the first pin 42 can drive the blade 3 to rotate under the guidance of the arc-shaped hole 21.

[0061] A columnar portion 32 is provided at one end of the blade 3. A columnar groove 14 corresponding to the columnar portion 32 is provided on the base 1. A circular hole 22 corresponding to the columnar portion 32 is provided on the cover plate 2. The axis of the columnar portion 32 is parallel to the axis of the light-transmitting hole, and the two ends of the columnar portion 32 protrude from the two end faces of the blade 3. When the blade 3 is assembled into the accommodating space 16, the two ends of the columnar portion 32 can be inserted into the columnar groove 14 and the circular hole 22 respectively, so that the columnar portion 32 can be rotated relative to the columnar groove 14 and the circular hole 22. The columnar groove 14 and the circular hole 22 play a certain limiting role for the columnar portion 32. A rotating shaft 7 is also provided in the columnar groove 14. The columnar portion 32 is sleeved on the rotating shaft 7, so that the columnar portion 32 can rotate around the fixed axis.

[0062] To ensure that the blade 3 can switch between the open and closed positions of the light-transmitting hole, an opening can be provided on the side of the accommodating space 16 near the light-transmitting hole, through which the blade 3 can enter and exit the accommodating space 16.

[0063] When it is necessary to open the light-transmitting hole, please refer to... Figure 4 and Figure 5At this time, the coil 62 is energized, the magnet 63 rotates, thereby driving the pendulum shaft 5 to rotate. The pendulum shaft 5 drives the connecting rod 4 to rotate to the first limiting part 12, and the corresponding blade 3 can rotate into the accommodating space 16, so that the light-transmitting hole is in the open state, that is, the blade 3 reaches the position of opening the light-transmitting hole. After the blade 3 reaches the position of opening the light-transmitting hole, due to the presence of the first limiting part 12, the connecting rod 4 cannot continue to rotate. At this time, the connecting rod 4 is perpendicular to the pendulum shaft 5. Specifically, the line of action of the force F1 exerted by the pendulum shaft 5 on the connecting rod 4 will pass through the swing axis 52 of the pendulum shaft 5. At this time, if the blade 3 has a tendency to move due to the impact, but because the vertical distance from the reaction force F2 of the connecting rod 4 on the pendulum shaft 5 to the swing axis 52 of the pendulum shaft 5 is zero, that is, the lever arm of the pendulum shaft 5 is zero, the connecting rod 4 cannot drive the pendulum shaft 5 to rotate in the opposite direction, and the blade 3 cannot move.

[0064] When it is necessary to close the light aperture, please refer to... Figure 6 and Figure 7 At this time, the coil 62 is energized in reverse, the magnet 63 rotates, thereby driving the pendulum shaft 5 to rotate. The pendulum shaft 5 drives the connecting rod 4 to rotate to the second limiting part 13. The corresponding blade 3 can rotate outside the accommodating space 16, so that the light-transmitting hole is closed. That is, the blade 3 reaches the position of closing the light-transmitting hole, realizing image correction. After the blade 3 reaches the position of closing the light-transmitting hole, due to the existence of the second limiting part 13, the connecting rod 4 cannot continue to rotate. At this time, the line of action of the force F1 of the pendulum shaft 5 on the connecting rod 4 will also pass through the swing axis 52 of the pendulum shaft 5. If the blade 3 has a tendency to move due to impact, but because the vertical distance from the reaction force F2 of the connecting rod 4 on the pendulum shaft 5 to the swing axis 52 of the pendulum shaft 5 is zero, that is, the lever arm of the pendulum shaft 5 is zero, the connecting rod 4 cannot drive the pendulum shaft 5 to rotate in the reverse direction, and the blade 3 cannot move.

[0065] By using the above method, the blade 3 can be self-locked at the position of opening and closing the light-transmitting hole, thereby preventing the problem of poor reliability of the shutter structure caused by impact and vibration.

[0066] Furthermore, the sequential arrangement of the blade 3, connecting rod 4, and swing shaft 5 along the direction from the cover plate 2 to the base 1, or along the axial direction of the light-transmitting aperture, avoids the connecting rod 4 and swing shaft 5 occupying space around the shutter structure. Simultaneously, the connecting rod 4 and swing shaft 5 can be located within the receiving groove 11, thus saving space in the shutter structure along the axial direction of the light-transmitting aperture and reducing the overall volume of the shutter structure. The blade 3 also provides a certain limiting effect on the connecting rod 4; that is, along the axial direction of the light-transmitting aperture, the blade 3 can constrain the position of the connecting rod 4 while avoiding affecting its rotation. Along the axial direction of the light-transmitting aperture, because the position of the connecting rod 4 is constrained, the position of the swing shaft 5 located below the connecting rod 4 is also constrained by the connecting rod 4, thereby ensuring that the connecting rod 4 and swing shaft 5 can be stably positioned along the axial direction of the light-transmitting aperture, resulting in stable rotation.

[0067] Currently, most existing shutter structures are designed separately from the infrared lens. As a moving component, the shutter is susceptible to dust falling onto the detector, forming circular spots. A common practice is to add a germanium sheet to the shutter for dust protection, but this increases the design and manufacturing complexity. This application provides an infrared lens where the shutter structure can be integrated into the center of the lens, solving the problem of dust falling onto the detector and eliminating the need for a dust-proof germanium window, thus simplifying the shutter design. Specifically, the infrared lens includes a lens barrel, lens elements, and a shutter structure. Multiple lens elements are sequentially arranged along the lens axis within the lens barrel. The shutter structure is the aforementioned shutter structure, which can be positioned between two adjacent lens elements, thereby solving the problem of dust falling onto the detector caused by the separate lens and shutter design. Furthermore, this infrared lens also possesses all the advantages of the aforementioned shutter structure.

[0068] 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.

[0069] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A single-blade shutter structure, characterized in that, include: A housing, wherein a light-transmitting hole is provided on the outer side of the housing; The blade (3) is rotatably mounted on the housing and is used to open and close the light-transmitting hole; A swing shaft (5) is rotatably mounted on the housing at one end, and the swing shaft (5) swings within a preset angle range; The connecting rod (4) is rotatably mounted on the housing and drives the blade (3) and the swing shaft (5). The pendulum shaft (5) is used to generate a force to drive the connecting rod (4) to rotate. The rotating connecting rod (4) is used to drive the blade (3) to rotate. When the light-transmitting hole is opened and / or closed, the line of action of the force passes through the swing axis (52) of the pendulum shaft (5).

2. The single-blade shutter structure according to claim 1, characterized in that, When the blade (3) is in the position of opening and / or closing the light-transmitting hole, the line connecting the point of application of the force of the connecting rod (4) and the pendulum shaft (5) and the swing shaft (52) is perpendicular to the connecting rod (4), so that the direction of the force applied by the pendulum shaft (5) to the connecting rod (4) always points to or away from the swing shaft (52) to form a static torque balance.

3. The single-blade shutter structure according to claim 1, characterized in that, The housing includes a base (1), a second oblong hole (41) in the middle of the connecting rod (4), and a second pin (51) at one end of the swing shaft (5) away from the swing shaft (52). The second pin (51) is movably disposed in the second oblong hole (41) to drive the connecting rod (4) to rotate; and / or One end of the connecting rod (4) is rotatably connected to the base (1), and the other end is provided with a first pin (42). The blade (3) is provided with a first waist-shaped hole (31). The first pin (42) is movably located in the first waist-shaped hole (31) to drive the blade (3) to rotate.

4. The single-blade shutter structure according to claim 3, characterized in that, It also includes a drive unit (6), which is placed in the receiving groove (11) of the base (1), and the drive unit (6) includes: The U-shaped electromagnet is fixedly disposed in the receiving groove (11), including a U-shaped iron core (61) and a coil (62) wound on the U-shaped arm of the U-shaped iron core (61). The open end of the U-shaped iron core (61) is magnetic. A magnet (63) is disposed inside the opening end of the U-shaped iron core (61). The magnetism of the magnet (63) is the same as that of the U-shaped electromagnet and repulses each other, so as to drive the magnet (63) to rotate. The magnet (63) is fixedly connected to the pendulum shaft (5) so that the pendulum shaft (5) swings around the axis of the magnet (63).

5. The single-blade shutter structure according to claim 4, characterized in that, The receiving groove (11) is provided with a first limiting part (12) and a second limiting part (13). The connecting rod (4) or the swing shaft (5) swings between the first limiting part (12) and the second limiting part (13). When the light-transmitting hole is open, the connecting rod (4) or the swing shaft (5) is limited and abuts against the first limiting part (12). When the light-transmitting hole is closed, the connecting rod (4) or the swing shaft (5) is limited and abuts against the second limiting part (13).

6. The single-blade shutter structure according to any one of claims 3-5, characterized in that, The housing also includes a cover plate (2), and the base (1) has protrusions (15) on both sides. The cover plate (2) is fixed to the protrusions (15) to form an accommodating space (16) between the two protrusions (15). The blade (3) is disposed in the accommodating space (16).

7. The single-blade shutter structure according to claim 6, characterized in that, The cover plate (2) is provided with an arc-shaped hole (21). The first pin (42) passes through the first waist-shaped hole (31) and extends into the arc-shaped hole (21). The first pin (42) is movably arranged in the arc-shaped hole (21).

8. The single-blade shutter structure according to claim 6, characterized in that, The blade (3) is provided with a columnar part (32), the base (1) is provided with a columnar groove (14), and the cover plate (2) is provided with a round hole (22). The two ends of the columnar part (32) are respectively inserted into the columnar groove (14) and the round hole (22), and are rotatably arranged relative to the columnar groove (14) and the round hole (22). A rotating shaft (7) is provided in the columnar groove (14), and the columnar part (32) is sleeved on the rotating shaft (7) and rotates about the axis of the rotating shaft (7).

9. The single-blade shutter structure according to claim 6, characterized in that, The accommodating space (16) has an opening on the side near the light-transmitting hole, and the blade (3) enters and exits the accommodating space (16) through the opening so that the blade (3) can switch between the position of closing the light-transmitting hole and the position of opening the light-transmitting hole.

10. The single-blade shutter structure according to claim 6, characterized in that, Along the direction from the cover plate (2) to the base (1), the blade (3), the connecting rod (4), and the swing shaft (5) are arranged in sequence.

11. An infrared lens, characterized in that, include: Lens tube; Several lenses are sequentially arranged inside the lens barrel along the axial direction of the lens barrel; The shutter structure is a single-blade shutter structure as described in any one of claims 1-10, wherein the shutter structure is disposed between two adjacent lenses.

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