A self-locking shutter and infrared imaging system

Abstract

This utility model discloses a self-locking shutter and an infrared imaging system, relating to the field of infrared imaging technology. The self-locking shutter includes: a housing and a driving component; a rotating component including a rotating shaft rotatably connected to a swinging part; and blades rotatably connected to the rotating shaft to achieve opening and closing. Both the blades and the swinging part are provided with a first position A and a second position B. When the blades switch between open and closed states, the rotating shaft moves from the first position A to the second position B and then back to the first position A. When the driving component is in standby mode, the first positions A corresponding to the blades and the swinging part can limit the blade deflection. When the driving component is in the start-up mode, the swinging part drives the rotating shaft to rotate in a preset direction to unlock from the first position A. The rotation of the rotating shaft can drive the blades to rotate in the opposite direction to the preset direction until the rotating shaft moves back to the first position A. By setting the first position A, the blades can be reliably maintained in the open and closed states, avoiding displacement caused by vibration and impact.

Description

Technical Field

[0001] This invention relates to the field of infrared imaging technology, and more specifically, to a self-locking shutter. Furthermore, this invention also relates to an infrared imaging system including the aforementioned self-locking shutter. Background Technology

[0002] Infrared imaging shutters are an essential component of infrared imaging systems, used to correct and eliminate the effects of non-uniformity in the infrared focal plane array. In practical applications, the shutter blades rotate to switch between open and closed states. However, under conditions such as impact or vibration, insufficient blade holding force can alter the opening and closing state, thus limiting the shutter's application scenarios.

[0003] In summary, how to avoid changes in the opening and closing state of blades under impact vibration is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a self-locking shutter that can avoid changes in the opening and closing state of the shutter blades under impact and vibration, thereby broadening the application scenarios and improving its applicability. Another purpose of this utility model is to provide an infrared imaging system including the above-mentioned self-locking shutter.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A self-locking shutter includes:

[0007] shell;

[0008] The driving component is rotatably connected to the housing and has a swinging part;

[0009] The rotating component is provided with a rotating shaft that is rotatably connected to the swinging part;

[0010] The blade is rotatably connected to the rotating shaft to achieve opening and closing. Both the blade and the swing part are provided with a first position A and a second position B. When the blade switches between the opening and closing states, the rotating shaft moves from the first position A to the second position B and then moves back to the first position A.

[0011] When the drive unit is in standby mode, the first position A corresponding to the blade and the swing part can cooperate with the rotating shaft to limit the deflection of the blade;

[0012] When the drive unit is in the start state, the swing part drives the rotating shaft to rotate in a preset direction to unlock from the first position A. The rotation of the rotating shaft can drive the blade to rotate in the opposite direction to the preset direction until the rotating shaft moves back to the first position A.

[0013] Preferably, the outer casing is provided with an arc-shaped groove, the opening of the arc-shaped groove is arranged facing the rotation center of the drive member, and the two ends of the arc-shaped groove are respectively provided with a first limiting part and a second limiting part for limiting the deflection of the blade. When the rotating shaft is in the first position A, it is located in the first limiting part or the second limiting part of the arc-shaped groove.

[0014] Preferably, the outer casing is provided with a fixed shaft for the rotation of the blade, and the included angle formed by the line connecting the center of the rotating shaft and the center of the rotating part rotatably connected to the outer casing, and the line connecting the center of the rotating shaft and the center of the fixed shaft is an acute angle;

[0015] The included angle formed by the line connecting the center of the rotating shaft and the center of the rotating part rotatably connected to the outer shell, and the line connecting the center of the rotating shaft and the center of the main body rotatably connected to the outer shell, is an acute angle.

[0016] Preferably, the blade has a first elongated groove on the side near the swinging part, and the first position A and the second position B are respectively provided at both ends of the first elongated groove;

[0017] The swinging part is provided with a second long groove close to the first long groove, and the two ends of the second long groove are respectively provided with the first position A and the second position B.

[0018] Preferably, one end of the swinging part is connected to the main body, and the other end of the swinging part is connected to the rotating shaft;

[0019] The length of the line connecting the center of the swing part and the connection part of the main body and the center of the rotating shaft is the first length, and the length of the line connecting the center of the rotating shaft and the center of the rotating part is the second length. The first length is greater than the second length.

[0020] Preferably, at least one blade is provided on each of the opposite sides of the outer casing, and the blades on the opposite sides of the outer casing can move closer or further apart under the action of the driving member on the corresponding side to achieve switching between open and closed states.

[0021] Preferably, the outer shell has at least two blades distributed along its height direction on the same side, and each of the two adjacent blades has a rotating groove that is rotatably connected to the fixed shaft corresponding to the other. Along the height direction of the outer shell, the length of the first elongated grooves provided on the at least two blades increases or decreases.

[0022] Preferably, the opening direction of the rotating groove is away from the swing part, and the two ends of the rotating groove correspond to the third limiting part and the fourth limiting part. When the rotating shaft is in the first position A, the fixed shaft provided in the rotating groove is located in the third limiting part or the fourth limiting part.

[0023] Preferably, the centers of the fixed shafts corresponding to at least two blades located on the same side of the outer casing, the center of the connecting part between the swinging part and the main body, and the center of the rotating part are located on the same straight line.

[0024] This invention also provides an infrared imaging system, including the self-locking shutter described in any of the above claims.

[0025] The self-locking shutter provided by this utility model includes a housing, a drive component, a rotating component, and blades. The drive component is rotatably connected to the housing and has a swinging part. The drive component has a locked state and an unlocked state. The rotating component has a rotating shaft rotatably connected to the swinging part, and the blades are rotatably connected to the rotating shaft to achieve opening and closing. Both the swinging part and the blades have a first position and a second position. When the drive component is in a standby state, the swinging part, the rotating shaft, and the blades cannot rotate. The rotating shaft is in the first position of the swinging part and the blades. The rotation of the blades is restricted by the rotating shaft being in the first position to prevent the blades from moving under impact or vibration. When the drive component is in the start state, the swinging part can drive the rotating shaft to rotate in a preset direction, so that the rotating shaft is unlocked from the first position, and can drive the blades to rotate in the opposite direction to the preset direction until the rotating shaft rotates back to the first position, completing the switching of the blades' opening and closing states. After the blades' states are switched, the rotating shaft is still in the first position, which can prevent the blades from shifting under impact or vibration and ensure the reliable holding of the blades in the opening and closing states.

[0026] The beneficial effects of this invention are as follows: By setting both a first position and a second position on the swing part and the blade, and by locking the open or closed state of the blade through the cooperation of the rotating shaft of the rotating part with the first position, bidirectional locking of the blade can be achieved. This prevents the blade from deflecting due to its own weight or external forces such as vibration and impact, ensuring sufficient holding force to prevent blade deflection. This allows the shutter to be applied to more application scenarios, such as vehicle-mounted scenarios or other applications involving bumpy conditions. Attached Figure Description

[0027] 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.

[0028] Figure 1 A schematic diagram of the structure of the self-locking shutter provided by this utility model;

[0029] Figure 2 for Figure 1 Exploded view;

[0030] Figure 3 for Figure 1 Internal structure diagram;

[0031] Figure 4 for Figure 3 The front view;

[0032] Figure 5 This is a schematic diagram showing the position of the arc-shaped groove provided by this utility model;

[0033] Figure 6 This is a schematic diagram of the blade in closed and open states provided by this utility model;

[0034] Figure 7 for Figure 6 Another perspective illustration;

[0035] Figure 8 for Figure 7 Top view;

[0036] Figure 9 This is a schematic diagram of the structure of the driving component provided by this utility model;

[0037] Figure 10 A schematic diagram of the blade provided by this utility model;

[0038] Figure 11 This is a schematic diagram of another structure of the blade provided by this utility model.

[0039] Figures 1-11 In the accompanying drawings, the reference numerals include:

[0040] 1-Cover plate; 2-Outer shell; 3-First partition; 4-Second partition; 5-Driver; 6-Germanium window; 7-Fixed shaft; 8-Blade; 9-Rotating component; 10-Magnetic component; 11-Coil;

[0041] 21-Arc-shaped groove; 51-Swinging part; 52-Main body; 53-Second elongated groove; 81-Rotating groove; 82-First elongated groove; 91-Rotating shaft; 92-Rotating part;

[0042] 211-First limiting part; 212-Second limiting part; 811-Third limiting part; 812-Fourth limiting part;

[0043] A - First position; B - Second position. Detailed Implementation

[0044] 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.

[0045] The core of this invention is to provide a self-locking shutter that can reliably retain force when the blades are open or closed, preventing changes in the blade opening and closing state under impact and vibration, and improving applicability. Another core aspect of this invention is to provide an infrared imaging system including the aforementioned self-locking shutter.

[0046] The self-locking shutter provided by this utility model includes a housing 2, a driving component 5, a rotating component 9, and a blade 8. Please refer to [reference needed]. Figure 1 , Figure 2 .

[0047] The drive component 5 is rotatably connected to the housing 2. Specifically, the drive component 5 is a component that can provide rotational driving force, such as a manual or automatic turntable. The automatic drive can be achieved by electric or magnetic drive.

[0048] In one specific embodiment, the driving component 5 is a magnetic pendulum shaft. The power for the rotation of the driving component 5 comes from the magnetic component 10 that is paired with it. A coil 11 mounted on the magnetic component 10 generates a magnetic field when energized, which is conducted through the magnetic component 10 to drive the corresponding driving component 5 to rotate, thereby providing the power for switching the opening and closing states of the blades 8. The driving component 5 has a swinging part 51, which rotates along with the driving component 5.

[0049] Please refer to Figure 3 The rotating component 9 is provided with a rotating shaft 91 that is offset from its center. The center of the rotating component 9 is the center of the rotating part 92. The rotating part 92 of the rotating component 9 is rotatably connected to the outer shell 2. The rotating shaft 91 is rotatably connected to the swing part 51. By rotating the swing part 51, the rotating shaft 91 can be driven to rotate around the center of the rotating part 92, thereby driving the blade 8 to rotate to achieve the switching of the opening and closing state.

[0050] The closure of blade 8 aids in calibration and correction. Specifically, blade 8 needs to be closed periodically, corresponding to the calibration and correction of the infrared focal plane array. After correction, blade 8 is reopened to allow light to enter for imaging. Please refer to [link / reference needed]. Figure 6 , Figure 7 Both the swing part 51 and the blade 8 are provided with a first position A and a second position B. In the first position A state, the blade 8 is in a locked state, and in the second position B state, the blade 8 is in a free state.

[0051] The rotating shaft 91 passes through the swing part 51 and the blade 8. When the shutter is fully open or fully closed, the rotating shaft 91 is located at the first position A corresponding to the swing part 51 and the blade 8 respectively, and the blade 8 is locked. During the switching between the shutter opening and closing states, the blade 8 is unlocked, and the rotating shaft 91 passes through the second position B corresponding to the swing part 51 and the blade 8 respectively.

[0052] Specifically, when the drive unit 5 is in standby mode, the first position A corresponding to the blade 8 and the swing part 51 can limit the deflection of the blade 8; the standby mode here means that the drive unit 5 is not working and cannot provide driving force.

[0053] When the drive unit 5 is in the activated state, the swing part 51 drives the rotating shaft 91 to rotate in a preset direction to unlock from the first position A. The rotation of the rotating shaft 91 can drive the blade 8 to rotate in the opposite direction to the preset direction until the rotating shaft 91 moves back to the first position A. The activated state here is the state in which the drive unit 5 can provide driving force.

[0054] Furthermore, the drive unit 5 is in the start-up state, which corresponds to the ability to provide two driving forces in opposite directions, such as the drive unit 5 rotating forward and in reverse, so as to reliably switch the blade 8 from open to closed state according to the actual situation.

[0055] like Figure 7 As shown, in this state, the lower left blade 8 is in the open state, and the drive unit 5 is in the standby state. Under the action of the blade 8's own weight and the force of impact vibration, the blade 8 tends to rotate clockwise. However, in this state, the rotating shaft 91 is in the first position A of the swing part 51 and the blade 8. Under the action of the first position A, the blade 8 cannot rotate clockwise, thus achieving self-locking of the open state of the blade 8. If it is necessary to unlock from this state, the drive unit 5 needs to be activated to provide driving force, that is, the coil 11 is energized, so that the drive unit 5 can rotate counterclockwise to drive the rotating shaft 91 to rotate counterclockwise. The counterclockwise rotation of the rotating shaft 91 can drive the blade 8 to rotate clockwise. Specifically, the rotating shaft 91 first unlocks through the first position A, then moves to the second position B, and then moves back to the first position A, so that the blade 8 rotates clockwise to the closed state and is still locked by the first position A. The preset direction can be clockwise or counterclockwise, and the opposite of the preset direction is counterclockwise or clockwise, respectively.

[0056] like Figure 6As shown, in this state, the lower left blade 8 is closed, and the drive unit 5 is in standby mode. Under the weight of the blade 8 and the force of impact and vibration, the blade 8 tends to rotate counterclockwise. However, in this state, the shaft 91 is at the first position A of the swing part 51 and the blade 8. Under the action of the first position A, the blade 8 cannot rotate clockwise, thus achieving self-locking of the closed state. If it is necessary to unlock from this state, the drive unit 5 needs to be activated to provide driving force, that is, the coil 11 is energized, enabling the drive unit 5 to rotate clockwise. Specifically, the rotation of the shaft 91 allows it to first unlock at the first position A, then move to the second position B, and then move back to the first position A, causing the blade 8 to rotate counterclockwise to the open state, but still be locked at the first position A.

[0057] In this embodiment, by limiting the distance between the first position A and the second position B, the movement of the rotating shaft 91 when the blade 8 switches between open and closed states is via the first position A - the second position B - the first position A, so that the blade 8 can be reliably locked in the first position A, avoiding the situation of displacement.

[0058] In this embodiment, the first position A can limit the deflection of the blade 8 because after the blade 8 rotates to this position, due to the position limitation of the first position A, the rotating shaft 91 cannot move from the first position A in a direction relatively far away from the second position B, so as to provide a reliable holding force to keep the blade 8 in the open or closed state.

[0059] In this embodiment, the first position A is used to lock the position of the blade 8, while the second position B is the position where the blade 8 can rotate in a preset direction as needed, and is the transition section for switching the opening and closing state of the blade 8.

[0060] In this embodiment, both the swing part 51 and the blade 8 are provided with a first position A and a second position B. The first position A locks the open or closed state of the blade 8, enabling bidirectional locking of the blade 8. This prevents the blade 8 from deflecting due to its own weight or external forces such as vibration and impact, ensuring sufficient holding force to prevent deflection and allowing the shutter to be applied to more scenarios, such as vehicle-mounted scenarios or other applications with bumpy conditions.

[0061] Based on the above embodiments, please refer to Figure 5 The outer casing 2 is provided with an arc-shaped groove 21. The opening of the arc-shaped groove 21 is set towards the swing part 51. The two ends of the arc-shaped groove 21 are respectively provided with a first limiting part 211 and a second limiting part 212 for limiting the deflection of the blade 8. When the rotating shaft 91 is in the first position A, it is located at the first limiting part 211 or the second limiting part 212 of the arc-shaped groove 21.

[0062] The range of the arc groove 21 corresponds to the rotation range of the blade 8 when switching from the open state to the closed state. For example, when the open state is when the rotating shaft 91 is in the second limit part 212, the closed state is when the rotating shaft 91 is in the first limit part 211.

[0063] When the rotating shaft 91 is in the first position A, it is also located in the first limiting part 211 or the second limiting part 212; when the rotating shaft 91 is in the second position B, the rotating shaft 91 is located at a certain position between the first limiting part 211 and the second limiting part 212. Specifically, the certain position may be the middle position of the arc groove 21, corresponding to the position where the rotating shaft 91 is located in the arc groove 21 when it moves from the first position A to the second position B.

[0064] In this embodiment, the opening of the arc-shaped groove 21 is arranged facing the rotation center of the drive member 5, as shown in the figure. Under the action of the first position A and the second limiting part 212, the deflection of the blade 8 in the open state can be restricted; under the action of the first position A and the first limiting part 211, the deflection of the blade 8 in the closed state can be restricted.

[0065] Specifically, such as Figure 8 As shown, when the blade 8 is in the open state, the blade 8 tends to rotate clockwise. Since the rotating shaft 91 is located inside the second limiting part 212 at this time, the blade 8 cannot continue to rotate clockwise. When the driving member 5 has driving force, the blade 8 can only rotate counterclockwise. The rotating shaft 91 moves towards the first limiting part 211 to gradually switch from the open state to the closed state.

[0066] like Figure 8 As shown, when the blade 8 is closed, the blade 8 tends to rotate counterclockwise. Since the rotating shaft 91 is located inside the first limiting part 211 at this time, the blade 8 cannot rotate counterclockwise. It can only rotate clockwise based on the driving force of the driving member 5. The rotating shaft 91 moves towards the second limiting part 212 to gradually switch from the closed state to the open state.

[0067] In this embodiment, the arc groove 21 can be further combined with the first position A to ensure that the blade 8 is reliably held in the open or closed state, ensuring a reliable holding force and avoiding the deflection of the blade 8 under the action of external force or its own weight.

[0068] Furthermore, the arc groove 21 can also ensure the service life of the blade 8. This is because the friction between the rotating shaft 91 and the second position B and the first position A is large during use, which can easily damage the blade 8 and the drive component 5. The arc groove 21 can provide a guide for the rotation of the rotating shaft 91, so as to facilitate the movement of the rotating shaft 91 between the second position B and the first position A, reduce the friction on the blade 8 and the swing part 51, and ensure the service life of the blade 8 and the swing part 51.

[0069] In this embodiment, the arc of the arc groove 21 can be set to 180 degrees.

[0070] Based on any of the above embodiments, please refer to Figure 5 The outer casing 2 is provided with a fixed shaft 7 for the rotation of the blade 8. The fixed shaft 7 is fixedly set here, and the blade 8 can rotate around this fixed shaft 7 when it rotates.

[0071] The included angle formed by the line connecting the center of the rotating shaft 91 and the center of the rotating part 92 rotatably connected to the outer casing 2, and the line connecting the center of the rotating shaft 91 and the center of the fixed shaft 7, is an acute angle;

[0072] The included angle formed by the line connecting the center of the rotating shaft 91 and the center of the rotating part 92 rotatably connected to the outer casing 2, and the line connecting the center of the rotating shaft 91 and the center of the main body 52 rotatably connected to the outer casing 2, is an acute angle.

[0073] like Figure 8 As shown, the upper blade 8 is in the closed state, and the lower blade 8 is in the open state.

[0074] Corresponding to Figure 8 In the configuration, there are two fixed shafts 7 on the same side, and the centers of the two fixed shafts 7 are E and F, respectively. The center of the rotating shaft 91 is C, the rotation center of the rotating part 92 of the rotating component 9 is D, and the center of the main body 52 of the driving component 5 is G.

[0075] When blade 8 is in the closed state, the angle formed by CE and CD is an acute angle, the angle formed by CF and CD is an acute angle, and blade 8 has a tendency to rotate counterclockwise. Due to the restriction of the first position A and the second limiting part 212, blade 8 is locked in the closed state. After the coil 11 is energized, after the driving member 5 obtains the driving force, the angle formed by CG and CD is an acute angle. The driving member 5 will drive the rotating shaft 91 to rotate clockwise through the swing part 51, and at the same time, blade 8 can rotate counterclockwise to realize the switching of blade 8 from closed to open state.

[0076] When the blade 8 is in the open state, the angle formed by CE and CD is an acute angle, the angle formed by CF and CD is an acute angle, and the blade 8 has a tendency to rotate clockwise. Due to the restriction of the first position A and the first limiting part 211, the blade 8 is locked in the open state. After the coil 11 is energized, the driving member 5 obtains driving force, the angle formed by CG and CD is an acute angle, and the driving member 5 drives the rotating shaft 91 to rotate counterclockwise through the swing part 51. At the same time, the blade 8 can rotate clockwise to realize the switching of the open-closed state of the blade 8.

[0077] In the above process, it should be noted that the current supplied to the coil 11 during the opening-closing and closing-opening of the blade 8 is in opposite directions, so as to realize the bidirectional rotation of the drive component 5.

[0078] Based on any of the above embodiments, please refer to Figure 8 , Figure 10 , Figure 11 The blade 8 has a first elongated groove 82 on the side near the swing part 51, and the two ends of the first elongated groove 82 are respectively provided with a first position A and a second position B; the swing part 51 has a second elongated groove 53 near the first elongated groove 82, and the two ends of the second elongated groove 53 are respectively provided with a first position A and a second position B.

[0079] In this embodiment, the structure on the blade 8 and the swing part 51 that can form the first position A and the second position B is in the form of a long groove.

[0080] In this embodiment, the lengths of the first elongated groove 82 and the second elongated groove 53 can be the same or different. Specifically, when the lengths of the first elongated groove 82 and the second elongated groove 53 are the same, the rotation range of the swing part 51 and the rotation range of the blade 8 are the same; if the lengths of the first elongated groove 82 and the second elongated groove 53 are different, the rotation range of the swing part 51 can be less than or greater than the rotation range of the blade 8. In any case, when the rotating shaft 91 moves to the first position A of the first elongated groove 82, it must also be located at the first position A of the second elongated groove 53; when the rotating shaft 91 moves to the second position B of the first elongated groove 82, it must also be located at the second position B of the second elongated groove 53.

[0081] In this embodiment, both ends of the first elongated groove 82 and the second elongated groove 53 are arc-shaped structures that cooperate with the rotating shaft 91. When the rotating shaft 91 rotates to the arc-shaped structure corresponding to the first position A, the blade 8 can be reliably locked in the closed / open state.

[0082] Based on any of the above embodiments, please refer to Figure 9 The driving component 5 includes a main body 52, one end of a swing part 51 is connected to the main body 52, and the other end of the swing part 51 is connected to a rotating shaft 91. The length of the line connecting the center of the connection between the swing part 51 and the main body 52 and the center of the rotating shaft 91 is a first length, and the length of the line connecting the center of the rotating shaft 91 and the center of the rotating part 92 is a second length. The first length is greater than the second length.

[0083] The swing part 51 is a long arm extending relative to the main body 52. ​​When the coil 11 is energized, it can cause the main body 52 to rotate through the magnetic component 10, thereby causing the swing part 51 to rotate, which in turn drives the rotation of the rotating shaft 91.

[0084] Please refer to Figure 8The center of the connection between the swing part 51 and the main body 52 is the center G of the main body 52, the center of the rotating shaft 91 is the center C, and the center of the rotating part 92 is the center D. The length of GC is the first length L1, and the length of CD is the second length L2, where L1 > L2. With this arrangement, the small angle of rotation of the swing part 51 can be enlarged to form a larger angle for bidirectional self-locking of the blade 8, without affecting the drive of the drive member 5 on the rotating shaft 91.

[0085] The small rotation angle of the swing part 51 is mainly limited by the relatively small driving force generated by electromagnetic induction, which is insufficient to meet the bidirectional locking requirements of the blade 8. Therefore, based on the setting of L1>L2, the rotation angle of the swing part 51 can be amplified by the rotating member 9, so that the swing part 51 can rotate at a small angle and the blade 8 can rotate at a large angle.

[0086] Based on any of the above embodiments, please refer to Figure 8 At least one blade 8 is provided on each of the two opposite sides of the outer casing 2. The blades 8 on the opposite sides of the outer casing 2 can move closer or further apart under the action of the driving member 5 on the corresponding side to achieve the switching of the open and closed state.

[0087] like Figure 7 As shown, the outer shell 2 has a driving member 5 and a rotating member 9 respectively on its two opposite sides, and a rotating groove 81 is provided at the corresponding position of the outer shell 2. The blade 8 on each side can be self-locked in the closed state by the corresponding first position A and the first limiting part 211 of the rotating groove 81; the blade 8 on each side can be self-locked in the open state by the corresponding first position A and the second limiting part 212 of the rotating groove 81.

[0088] Specifically, at least one blade 8 is provided on each of the opposite sides of the outer casing 2. When the blades 8 on both sides are brought closer together, the shutter is closed; when the blades 8 on both sides are moved further apart, the shutter is opened.

[0089] If a blade 8 is provided on each of the two opposite sides of the outer casing 2, then... Figure 10 The blades shown are acceptable; for example, if two blades 8 are respectively arranged on opposite sides of the outer casing 2, then the blades used are... Figure 10 and Figure 11 The two blades shown can be considered as a set of blades.

[0090] Based on any of the above embodiments, please refer to Figure 7 The outer casing 2 has at least two blades 8 distributed along its height direction on the same side, and at least two fixed shafts 7 are provided on the outer casing 2 for the rotation of at least two blades 8. The rotation angles of the at least two blades 8 are different, and they can work together to cut off light transmission or work together to allow light to pass through.

[0091] Each of two adjacent blades 8 has a rotating groove 81 that is rotatably connected to a fixed shaft 7 corresponding to the other. This rotating groove 81 represents the range of relative rotation between the two adjacent blades 8. Along the height of the outer casing 2, the lengths of the first elongated grooves 82 provided on at least two blades 8 increase or decrease, corresponding to different rotation angles of the at least two blades 8. When the rotating shaft 91 is driven by the driving member 5 to drive the rotation of at least two blades 8 located on the same side, the blade 8 with the longer first elongated groove 82 can rotate at a larger relative angle.

[0092] In one specific embodiment, the length of the first elongated groove 82 of the upper blade 8 is greater than the length of the first elongated groove 82 of the lower blade 8, and a rotation groove 81 is provided on the lower blade 8; conversely, the length of the first elongated groove 82 of the upper blade 8 is less than the length of the first elongated groove 82 of the lower blade 8, and a rotation groove 81 is provided on the upper blade 8. The four blades 8 are arranged along the height direction of the outer shell 2, and their rotations do not interfere with each other.

[0093] Based on any of the above embodiments, please refer to Figure 6 , Figure 7 The opening of the rotating groove 81 is positioned away from the swing part 51. The two ends of the rotating groove 81 correspond to the third limiting part 811 and the fourth limiting part 812. When the rotating shaft 91 is in the first position A, the fixed shaft 7 located in the rotating groove 81 is positioned at either the third limiting part 811 or the fourth limiting part 812. It should be noted that the fixed shaft 7 located in the rotating groove 81 here is different from the fixed shaft 7 that only serves as the rotating shaft for a single blade 8. Specifically, as shown... Figure 6 , Figure 7 Two fixed shafts 7 are located on the same side. One is a rotating shaft used only for the rotation of a single blade 8, and the other, located in the rotating groove 81, can provide a rotating shaft 91 for the rotation of one blade 8 and positioning for the relative rotation of the other blade 8.

[0094] like Figure 7 As shown, the blade 8 located on the lower left side is in the open state. At this time, the rotating shaft 91 is in the first position A, and the fixed shaft 7 located in the rotating groove 81 is in the third limiting part 811. The setting of the third limiting part 811 can work together with the first position A and the second limiting part 212 to restrict the displacement of the blade 8 in the open state; Figure 8 As shown, the blade 8 located on the lower left side is in a closed state. At this time, the rotating shaft 91 is in the first position A, and the fixed shaft 7 located in the rotating groove 81 is in the fourth limiting part 812. The setting of the fourth limiting part 812 can work together with the first position A and the first limiting part 211 to restrict the offset of the blade 8 in the closed state.

[0095] Based on any of the above embodiments, the centers of the fixed shafts 7, the connecting part of the swing part 51 and the main body 52, and the center of the rotating part 92 corresponding to at least two blades 8 on the same side of the outer shell 2 are located on the same straight line.

[0096] like Figure 8 As shown, the centers of the fixed shafts 7 corresponding to the two blades 8 on the same side are D and F, respectively. The center of the connection between the swing part 51 and the main body 52 is G, and the center of the rotating part 92 is D. That is, D, F, G, and D are located on the same straight line, and the line structure formed on both sides of this straight line is symmetrical. Figure 8 The solid lines in the diagram correspond to the positions of the centers of each component when the blade 8 is in the open state, while the dashed lines correspond to the positions of the centers of each component when the blade 8 is in the closed state.

[0097] In addition, the self-locking shutter also includes a circuit board located on the housing 2, which controls the opening and closing of the blades 8 by controlling the direction of the energized current in the control coil 11. The circuit board can be located in any area outside or inside the housing 2, as long as it facilitates the electrical connection between the circuit board and the coil 11 without interfering with the components.

[0098] In addition, the self-locking shutter also includes a first partition 3, a second partition 4, and a cover plate 1 for protection. The first partition 3 separates the blades 8 on both sides of the housing 2 to prevent collisions and friction during rotation, thus ensuring the lifespan of the blades 8. The second partition 4 prevents interference between the blades 8 and components inside the housing 2, such as the germanium window 6 and the drive unit 5. The cover plate 1 is fixed inside the housing 2 to prevent the blades 8 from being exposed, thus protecting the blades 8. Figure 2 The cover plate 1, the first set of blades 8, the first partition plate 3, the second set of blades 8, the partition plate, and the germanium window 6 are arranged in sequence.

[0099] In addition to the aforementioned self-locking shutter, this utility model also provides an infrared imaging system that includes the self-locking shutter disclosed in the above embodiments. Because the infrared imaging system has the aforementioned self-locking shutter, it can achieve bidirectional self-locking and ensure reliable holding force in the shutter opening and closing states, so as to be applicable to bumpy application scenarios such as vehicle-mounted applications and improve applicability.

[0100] 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.

[0101] The foregoing has provided a detailed description of the self-locking shutter and infrared imaging system provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A self-locking shutter, characterized by, include: Outer shell (2); The driving component (5) is rotatably connected to the outer casing (2) and is provided with a swinging part (51); The rotating component (9) is provided with a rotating shaft (91) that is rotatably connected to the swing part (51). The blade (8) is rotatably connected to the rotating shaft (91) to achieve opening and closing. Both the blade (8) and the swing part (51) are provided with a first position A and a second position B. When the blade (8) switches between open and closed states, the rotating shaft (91) moves from the first position A to the second position B and then moves back to the first position A. When the drive unit (5) is in standby mode, the first position A corresponding to the blade (8) and the swing part (51) can cooperate with the rotating shaft (91) to limit the deflection of the blade (8); When the drive unit (5) is in the start state, the swing part (51) drives the rotating shaft (91) to rotate in a preset direction to unlock from the first position A. The rotation of the rotating shaft (91) can drive the blade (8) to rotate in the opposite direction to the preset direction until the rotating shaft (91) moves to the first position A again.

2. The self-locking shutter according to claim 1, characterized in that The outer casing (2) is provided with an arc-shaped groove (21), the opening of which is directed toward the rotation center of the drive member (5). The two ends of the arc-shaped groove (21) are respectively provided with a first limiting part (211) and a second limiting part (212) for limiting the deflection of the blade (8). When the rotating shaft (91) is in the first position A, it is located at the first limiting part (211) or the second limiting part (212) of the arc-shaped groove (21).

3. The self-locking shutter according to claim 1, wherein The outer casing (2) is provided with a fixed shaft (7) for the rotation of the blade (8). The included angle formed by the line connecting the center of the rotating shaft (91) and the center of the rotating part (92) rotatably connected to the outer casing (2), and the line connecting the center of the rotating shaft (91) and the center of the fixed shaft (7) is an acute angle. The angle formed by the line connecting the center of the rotating shaft (91) and the center of the rotating part (92) rotatably connected to the outer shell (2), and the line connecting the center of the rotating shaft (91) and the center of the main body (52) rotatably connected to the outer shell (2) is an acute angle.

4. The self-locking shutter according to claim 3, characterized in that The blade (8) has a first elongated groove (82) on the side near the swing part (51), and the first position A and the second position B are respectively provided at both ends of the first elongated groove (82); The swing part (51) is provided with a second long groove (53) close to the first long groove (82), and the two ends of the second long groove (53) are respectively provided with the first position A and the second position B.

5. The self-locking shutter according to claim 4, characterized in that One end of the swing part (51) is connected to the main body (52), and the other end of the swing part (51) is connected to the rotating shaft (91). The length of the line connecting the center of the connecting part of the swing part (51) and the main body (52) and the center of the rotating shaft (91) is the first length, and the length of the line connecting the center of the rotating shaft (91) and the center of the rotating part (92) is the second length. The first length is greater than the second length.

6. The self-locking shutter according to claim 5, characterized in that At least one blade (8) is provided on each of the two opposite sides of the outer shell (2). The blades (8) on the opposite sides of the outer shell (2) can move closer or further away from each other under the action of the driving member (5) on the corresponding side, so as to realize the switching of the open and closed state.

7. The self-locking shutter according to claim 6, characterized in that The outer shell (2) has at least two blades (8) distributed along its height direction on the same side. Each of the two adjacent blades (8) has a rotating groove (81) that is rotatably connected to the fixed shaft (7) corresponding to the other. Along the height direction of the outer shell (2), the length of the first elongated groove (82) provided by the at least two blades (8) increases or decreases.

8. The self-locking shutter according to claim 7, characterized in that The opening direction of the rotating groove (81) is away from the swing part (51). The two ends of the rotating groove (81) correspond to the third limiting part (811) and the fourth limiting part (812). When the rotating shaft (91) is in the first position A, the fixed shaft (7) provided in the rotating groove (81) is located in the third limiting part (811) or the fourth limiting part (812).

9. The self-locking shutter according to any one of claims 3 to 8, characterized in that, The centers of the fixed shafts (7) corresponding to at least two blades (8) located on the same side of the outer shell (2), the center of the connecting part of the swing part (51) and the main body (52), and the center of the rotating part (92) are located on the same straight line.

10. An infrared imaging system, characterized in that, Includes the self-locking shutter as described in any one of claims 1 to 9.

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