A bistable lens shutter device and an infrared thermal imager

Abstract

The utility model provides a kind of bistable lens shielding device and infrared thermal imager.Bistable lens shielding device, including fixed plate, the baffle piece of rotation connection on fixed plate and the drive assembly for driving baffle piece rotates between shielding position and staggered position, the lens window is opened in the fixed plate, the rotation axis of the baffle piece is parallel with the axis of the lens window, the baffle piece respectively shields and avoids the lens window in the shielding position and the staggered position, the fixed plate is also equipped with for the baffle piece in shielding position and staggered position can position locking limiting component.It is rotated to shield or stagger lens window in the plane parallel to the lens window by the utility model design baffle piece, solve the problem that existing everted lens protection device occupies equipment external space;While design limiting component makes baffle piece can keep stable state in shielding position and staggered position, without designing special fixed structure, convenient to use.

Description

Technical Field

[0001] This utility model belongs to the field of infrared detection equipment technology, specifically relating to a bistable lens blocking device and an infrared thermal imager. Background Technology

[0002] An infrared thermal imager is a device that uses infrared thermal imaging technology to detect the infrared radiation of a target object and then uses signal processing, photoelectric conversion, and other methods to convert the temperature distribution of the target object into a visual image.

[0003] Currently, lens protection devices for infrared thermal imagers are generally outward-folding structures, which occupy external space of the equipment, require special fixing, and are inconvenient to use. Utility Model Content

[0004] The purpose of this invention is to provide a bistable lens blocking device, which can at least solve some of the defects existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A bistable lens blocking device includes a fixed plate, a baffle plate rotatably connected to the fixed plate, and a driving assembly for driving the baffle plate to rotate between a blocking position and a misaligned position. The fixed plate has a lens window, and the rotation axis of the baffle plate is parallel to the axis of the lens window. The baffle plate blocks and avoids the lens window in the blocking position and the misaligned position, respectively. The fixed plate is also provided with a limiting assembly for locking the baffle plate in both the blocking position and the misaligned position.

[0007] Furthermore, the limiting component includes a connecting plate, a torsion spring, and a torsion spring shaft. The torsion spring shaft is fixedly connected to the fixing plate. One end of the connecting plate is connected to the baffle. The connecting plate is provided with a shaft clearance groove corresponding to the position of the torsion spring shaft. One end of the torsion spring is connected to the torsion spring shaft, and the other end is connected to the end of the connecting plate away from the shaft clearance groove. When the torsion spring shaft is located at both ends of the shaft clearance groove, the baffle is located at the blocking position and the offset position respectively.

[0008] Furthermore, the shaft clearance groove is an arc-shaped oval groove.

[0009] Furthermore, the drive assembly includes a rocker arm, a rocker arm bushing, and a rocker arm shaft. The rocker arm shaft is fixed to the fixed plate, the rocker arm bushing is rotatably connected to the rocker arm shaft, the rocker arm is fixed to the rocker arm bushing, and the rocker arm bushing is drivenly connected to the baffle plate.

[0010] Furthermore, the rocker arm bushing and the baffle are connected by a meshing transmission.

[0011] Furthermore, the swing direction of the rocker arm is consistent with the movement direction of the baffle.

[0012] Furthermore, the fixing plate is provided with limiting blocks on both sides of the rocker arm to limit the rotation angle of the rocker arm.

[0013] Furthermore, a baffle shaft is vertically connected to the fixed plate, a baffle bushing is rotatably sleeved on the baffle shaft, and the baffle is fixed on the baffle bushing; the driving assembly is connected to the baffle bushing and drives the baffle bushing to rotate around the baffle shaft.

[0014] In addition, this utility model also provides an infrared thermal imager, including a housing, a lens disposed inside the housing, and the aforementioned bistable lens blocking device; the housing has a panel, and the panel has an image acquisition hole corresponding to the position of the lens, the fixing plate is disposed between the lens and the panel, and the lens window and the image acquisition hole are arranged facing each other.

[0015] Furthermore, the housing has a handheld portion, and the control end of the drive assembly is arranged close to the handheld portion.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] The bistable lens blocking device provided by this utility model is designed so that the baffle rotates in a plane parallel to the lens window to block or offset the lens window, which effectively solves the problem of existing outward-folding lens protection devices occupying external space of the equipment; at the same time, the design of the limiting component allows the baffle to maintain a stable state in the blocking and offset positions during rotation, without the need for additional special fixing structure design, making it convenient to use.

[0018] The present invention will be further described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the infrared thermal imager in this embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the bistable lens blocking device in this embodiment of the present invention;

[0021] Figure 3 This is an exploded view of the bistable lens blocking device in an embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram showing the state of the bistable lens blocking device blocking the lens window in an embodiment of this utility model;

[0023] Figure 5This is a schematic diagram showing the state of the bistable lens blocking device in an embodiment of this utility model, where the baffle is offset from the lens window.

[0024] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Image acquisition hole; 3. Fixing plate; 4. Baffle; 5. Baffle bushing; 6. Torsion spring shaft; 7. Connecting plate; 8. Torsion spring slot; 9. Torsion spring; 10. Shaft clearance groove; 11. Rocker arm shaft; 12. Rocker arm bushing; 13. Rocker arm; 14. Limiting block; 15. Clearance notch; 16. Lens window; 17. Baffle shaft. Detailed Implementation

[0025] 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 scope of protection of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do 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, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, abutting connections, or integral connections. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, this embodiment provides a bistable lens blocking device, including a fixed plate 3, a baffle 4 rotatably connected to the fixed plate 3, and a driving assembly for driving the baffle 4 to rotate between a blocking position and a misaligned position. The fixed plate 3 has a lens window 16, and the rotation axis of the baffle 4 is parallel to the axis of the lens window 16. The baffle 4 blocks and avoids the lens window 16 in the blocking position and the misaligned position, respectively. The fixed plate 3 is also provided with a limiting assembly for locking the position of the baffle 4 in both the blocking position and the misaligned position. In application, the lens window 16 on the fixing plate 3 is positioned directly opposite the lens. When the drive assembly drives the baffle to rotate, since the rotation axis of the baffle is parallel to the axis of the lens window 16, the baffle rotates in a plane parallel to the lens window 16. When the baffle rotates to the blocking position, the limiting component can stabilize the baffle in this position, at which point the baffle can completely block the lens window 16, thereby protecting the lens. When the baffle rotates to the offset position, the limiting component can stabilize the baffle in this position, at which point the baffle is completely offset from the lens window 16, thus opening the lens window 16 and allowing the lens to work normally. In this embodiment, the baffle is designed to rotate in a plane parallel to the lens window 16 to block or offset the lens window 16, effectively solving the problem of existing outward-folding lens protection devices occupying external space. At the same time, the limiting component is designed so that the baffle can remain stable in the blocking and offset positions during rotation, eliminating the need for an additional special fixing structure and making it convenient to use.

[0030] Regarding the connection method between the baffle 4 and the fixing plate 3, in some embodiments, such as Figure 2 and Figure 3 As shown, a baffle shaft 17 is vertically connected to the fixed plate 3, and a baffle sleeve 5 is rotatably sleeved on the baffle shaft 17. The baffle 4 is fixed to the baffle sleeve 5. The driving assembly is connected to the baffle sleeve 5 and drives the baffle sleeve 5 to rotate around the baffle shaft 17. This causes the baffle 4 to rotate around the baffle shaft 17. When the baffle 4 rotates to the lens window 16 (i.e., the blocking position), it blocks the lens window 16. Figure 4 As shown; rotating the baffle 4 in the opposite direction opens the obstruction of the lens window 16. When rotated to the offset position, the baffle 4 fully opens, obstructing the lens window 16, as shown. Figure 5 As shown.

[0031] Regarding the implementation of rotating the drive baffle 4, in some embodiments, manual drive can be used. Specifically, for example... Figure 2 and Figure 3As shown, the driving assembly includes a rocker arm 13, a rocker arm sleeve 12, and a rocker arm shaft 11. The rocker arm shaft 11 is fixed to the fixed plate 3, the rocker arm sleeve 12 is sleeved on the rocker arm shaft 11, and the rocker arm 13 is fixed to the rocker arm sleeve 12. The rocker arm sleeve 12 is connected to the baffle 4 via a transmission connection. Optionally, the rocker arm sleeve 12 is transmitted to the baffle 4 via the baffle sleeve 5. When the rocker arm 13 is manually driven to swing, it causes the rocker arm sleeve 12 to rotate around the rocker arm shaft 11. The rotation of the rocker arm sleeve 12 causes the baffle sleeve 5 to rotate around the baffle shaft 17, which in turn causes the baffle 4 to rotate. Therefore, by swinging the rocker arm 13 in different directions, the baffle 4 can be rotated in different directions. At the same time, by controlling the swing angle of the rocker arm 13, the rotation angle of the baffle 4 can be controlled, thereby achieving the blocking and offset of the baffle 4 from the lens window 16.

[0032] Regarding the transmission method between the rocker arm bushing 12 and the baffle bushing 5, in some embodiments, the rocker arm bushing 12 and the baffle bushing 5 are designed to be connected by meshing transmission. By designing different transmission ratios of the gears of the rocker arm bushing 12 and the baffle bushing 5, the rotation angle of the baffle 4 is different from the rotation angle of the rocker arm 13, thereby improving the manual feel.

[0033] Preferably, when designing the meshing transmission between the rocker arm bushing 12 and the baffle bushing 5, the swing direction of the rocker arm 13 is made consistent with the movement direction of the baffle 4, which facilitates control of the movement of the baffle 4 and extends the manual adjustment space. Furthermore, it can also be designed so that when the rocker arm 13 swings to its two extreme positions, the baffle 4 is respectively located in the blocking position and the offset position, which allows the baffle 4 to be positioned more quickly in the position of completely blocking / completely offset from the lens window 16.

[0034] Furthermore, the center of the rocker arm pivot 11, the rotation center of the baffle (i.e., the center of the baffle pivot 17), and the center of the lens window 16 are designed to be on the same straight line, so as to better control the rotation direction and angle of the baffle 4.

[0035] Preferably, the fixed plate 3 is provided with limiting blocks 14 on both sides of the rocker arm 13. The limiting blocks 14 on both sides limit the extreme position of the rocker arm 13 swing. At the same time, when the rocker arm 13 swings to the extreme positions at both ends, the baffle 4 is respectively located in the blocking position and the offset position. By using the blocking effect of the limiting blocks 14 on the rocker arm 13, the baffle 4 can maintain a stable state in the blocking position and the offset position.

[0036] As one specific implementation method, such as Figure 2 and Figure 3As shown, the limiting assembly includes a connecting plate 7, a torsion spring 9, and a torsion spring shaft 6. The torsion spring shaft 6 is fixedly connected to the fixing plate 3. One end of the connecting plate 7 is fixedly connected to the baffle bushing 5. The connecting plate 7 has a shaft clearance groove 10 corresponding to the position of the torsion spring shaft 6. One end of the torsion spring 9 is connected to the torsion spring shaft 6 and can rotate, while the other end is connected to the end of the connecting plate 7 away from the shaft clearance groove 10. When the torsion spring 9 is working, it is in a compressed state. When the torsion spring shaft 6 is located at both ends of the shaft clearance groove 10, the baffle 4 is located in the blocking position and the offset position, respectively. During operation, manually moving the rocker arm 13 rotates the baffle bushing 5, which in turn rotates the connecting plate 7. At this time, the shaft clearance groove 10 on the connecting plate 7 moves relative to the torsion spring shaft 6. Figure 4 As shown, when the upper end of the rotating shaft clearance groove 10 abuts against the torsion spring rotating shaft 6, the baffle 4 completely blocks the lens window 16. The torsion spring rotating shaft 6 restricts the connecting plate 7 on the baffle bushing 5 from continuing to rotate, while the torsion spring 9 remains in a compressed state. The reaction force of the compressed torsion spring 9 causes the connecting plate 7 on the baffle bushing 5 to stick to the torsion spring rotating shaft 6, maintaining a stable state, thereby stabilizing the baffle 4 in this state of completely blocking the lens window 16; similarly, as Figure 5 As shown, when the lower end of the rotating shaft clearance groove 10 abuts against the torsion spring shaft 6, the baffle 4 is in the fully open lens window 16 state, and the compression force of the torsion spring 9 keeps the baffle 4 stable in this state. However, when the torsion spring shaft 6 is between the two ends of the rotating shaft clearance groove 10, since there is no obstruction on the connecting plate 7 on the baffle bushing 5, and the torsion spring 9 has a large compression force, the connecting plate 7 on the baffle bushing 5 cannot maintain a stable state and continues to rotate until one end of the rotating shaft clearance groove 10 abuts against the torsion spring shaft 6. Therefore, the limiting component structure designed in this embodiment allows the baffle 4 to maintain a stable state in the obstructed position and the staggered position during rotation, without the need for an additional specially designed fixing structure, making it convenient to use.

[0037] Optionally, the connecting plate 7 is provided with a torsion spring slot 8, one end of the torsion spring 9 is connected to the torsion spring shaft 6, and the other end is engaged in the torsion spring slot 8.

[0038] The optimized design of the shaft clearance groove 10 is an arc-shaped oval groove structure, and its groove width is in clearance fit with the torsion spring shaft 6.

[0039] In addition, this utility model embodiment also provides an infrared thermal imager, such as Figure 1As shown, the device includes a housing 1, a lens (not shown) disposed inside the housing 1, and the aforementioned bistable lens blocking device. The housing 1 has a panel with an image acquisition hole 2 corresponding to the lens position. A fixing plate 3 is disposed between the lens and the panel, and the lens window 16 is directly opposite the image acquisition hole 2. When lens blocking is required, the blocking plate 4 is rotated by the drive assembly until it completely blocks the lens window 16. When the lens needs to acquire images, the blocking plate 4 is rotated in the opposite direction by the drive assembly, completely opening the lens window 16. During this rotation, the blocking plate 4 moves inside the housing 1, without occupying external space, making it convenient to use.

[0040] Specifically, when the drive assembly adopts the manual drive method described above, the housing 1 is also provided with a clearance notch 15 for the rocker arm 13 to extend out of the housing 1 and swing. Furthermore, the control end of the drive assembly (i.e., the rocker arm 13) is designed to be close to the hand-held part on the housing 1, so that it can be operated with one hand, making operation more convenient.

[0041] The above examples are merely illustrative of the present invention and do not constitute a limitation on the scope of protection of the present invention. All designs that are the same as or similar to the present invention are within the scope of protection of the present invention.

Claims

1. A bistable lens blocking device, characterized in that: The device includes a fixed plate, a baffle plate rotatably connected to the fixed plate, and a drive assembly for driving the baffle plate to rotate between a blocking position and a staggered position. The fixed plate has a lens window, and the rotation axis of the baffle plate is parallel to the axis of the lens window. The baffle plate blocks and avoids the lens window in the blocking position and the staggered position, respectively. The fixed plate is also provided with a limiting assembly for locking the baffle plate in both the blocking position and the staggered position.

2. The bistable lens blocking device as described in claim 1, characterized in that: The limiting assembly includes a connecting plate, a torsion spring, and a torsion spring shaft. The torsion spring shaft is fixedly connected to the fixing plate. One end of the connecting plate is connected to the baffle. The connecting plate is provided with a shaft clearance groove corresponding to the position of the torsion spring shaft. One end of the torsion spring is connected to the torsion spring shaft, and the other end is connected to the end of the connecting plate away from the shaft clearance groove. When the torsion spring shaft is located at both ends of the shaft clearance groove, the baffle is located at the blocking position and the offset position respectively.

3. The bistable lens blocking device as described in claim 2, characterized in that: The shaft clearance groove is an arc-shaped oval groove.

4. The bistable lens blocking device as described in claim 1, characterized in that: The drive assembly includes a rocker arm, a rocker arm bushing, and a rocker arm shaft. The rocker arm shaft is fixed to the fixed plate, the rocker arm bushing is rotatably connected to the rocker arm shaft, the rocker arm is fixed to the rocker arm bushing, and the rocker arm bushing is drivenly connected to the baffle plate.

5. The bistable lens blocking device as described in claim 4, characterized in that: The rocker arm bushing and the baffle are connected by a meshing transmission.

6. The bistable lens blocking device as described in claim 4, characterized in that: The swing direction of the rocker arm is consistent with the movement direction of the baffle.

7. The bistable lens blocking device as described in claim 4, characterized in that: The fixed plate is provided with limiting blocks on both sides of the rocker arm to limit the rotation angle of the rocker arm.

8. The bistable lens blocking device as described in claim 1, characterized in that: A baffle shaft is vertically connected to the fixed plate, and a baffle bushing is rotatably sleeved on the baffle shaft. The baffle is fixed on the baffle bushing. The driving assembly is connected to the baffle bushing and drives the baffle bushing to rotate around the baffle shaft.

9. An infrared thermal imager, characterized in that: The device includes a housing, a lens disposed inside the housing, and a bistable lens blocking device as described in any one of claims 1-8; the housing has a panel, the panel has an image acquisition hole corresponding to the position of the lens, the fixing plate is disposed between the lens and the panel, and the lens window is arranged opposite to the image acquisition hole.

10. The infrared thermal imager as described in claim 9, characterized in that: The housing has a handheld part, and the control end of the drive assembly is arranged close to the handheld part.

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