Wide-opening U-iron type thin infrared shutter device

Abstract

The utility model discloses a wide-opening U-iron type thin infrared shutter device, which comprises a fixed seat, a switching blade group and a driving mechanism, a light through hole is formed in the fixed seat; the number of the driving mechanisms is at least two, each driving mechanism comprises wide-opening U-shaped iron, a winding group, a magnet, a driving gear and a rocking handle, the middle of each wide-opening U-shaped iron is installed on the two opposite sides of the reverse side of the fixing base respectively, the two ends of each wide-opening U-shaped iron extend to the other side edge of the fixing base respectively, and an arc-shaped limiting groove is formed in the tail end of each wide-opening U-shaped iron; the two magnets are installed in magnet limiting grooves in the tail ends of the two adjacent wide-opening U-shaped irons respectively, the magnets are connected with the driving gear, the rocking handle is provided with a driven gear and a swing arm, the driven gear is meshed with the driving gear, and the swing arm extends out of the front face of the fixing base to be in transmission connection with the switching blade set. The driving mode that gear transmission is combined with pendulum shaking is adopted, the static force of a system is improved, the impact resistance is enhanced, the system can still work stably when being impacted and vibrated, and the service life is longer.

Description

Technical Field

[0001] The utility model relates to the field of infrared thermal imaging equipment, in particular to a wide-mouth U-iron type thin infrared shutter device. Background Art

[0002] In infrared thermal imaging equipment, the exposure of the imaging device directly affects image quality. Among the mechanical devices influencing exposure, the aperture and shutter play a particularly prominent role. The shutter switch controls the amount of light reaching the film or photosensitive element and is a crucial component of all imaging equipment. The stability of the shutter speed and the accuracy of the aperture switching directly affect image quality. Therefore, the design of the shutter and aperture is a highly demanding aspect of imaging equipment.

[0003] The existing shutter switch, also known as the shutter device, includes a light hole for thermal imaging, a blade, and a driving member. The driving member drives the blade to move on the light hole, thereby opening or closing the light hole to achieve the imaging effect. The existing driving member basically uses electromagnetic induction to achieve the driving action. However, the iron bars on the existing driving members are mostly narrow U-shaped. For example, Chinese patent CN219533577U specifically discloses a shock and vibration resistant infrared thermal imaging camera shutter, wherein the driving member includes an iron bar, a magnet, a winding shaft, and a driving coil. As shown in Figure 11 of the specification, the iron bar is narrow U-shaped, and the winding shaft is sleeved on one of the legs of the U-shaped iron core. The wire for winding the driving coil is tightly attached to the winding shaft. Such a setting can be used to guide the magnetic force generated by the driving coil to the two ends of the U-shaped iron core through the U-shaped iron core, providing a strong magnetic force. However, the above-mentioned iron bar is in a narrow U-shape, and the winding bobbin is sleeved on one of the legs. The winding length of the coil is limited and the magnetic field strength is insufficient. In addition, the magnet is set at the opening of the U-shaped iron core, the assembly stability is low, the overall thickness of the magnetic valve is large, and it does not meet the requirements of miniaturization. The magnetic field strength is poorly symmetrical, the static force is relatively low, and the impact resistance effect is insufficient. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a wide-mouth U-iron type thin infrared shutter device.

[0005] The purpose of the utility model is achieved by the following technical solution: a wide-mouth U-iron thin infrared shutter device, comprising a fixing base, a switching blade group, and a driving mechanism; the fixing base is provided with a light-through hole, and the switching blade group and the driving mechanism are respectively mounted on the front and back sides of the fixing base;

[0006] There are at least two driving mechanisms, each of which includes a wide-mouth U-iron, a winding group, a magnet, a driving gear and a crank. The winding group is wound around the middle of the wide-mouth U-iron, and the middle of each wide-mouth U-iron equipped with a winding group is respectively installed on two opposite sides of the back side of the fixed seat, and the two ends of the wide-mouth U-iron extend to the other side of the fixed seat respectively. The end of each wide-mouth U-iron is provided with an arc-shaped limiting groove; two magnets are respectively installed in the magnet limiting groove enclosed by the arc-shaped limiting grooves at the ends of two adjacent wide-mouth U-irons, and the magnet is connected to the driving gear. A passive gear and a swing arm are provided on the crank, and the passive gear and the driving gear are meshed with each other. The swing arm extends from the front of the fixed seat and is transmission-connected to the switching blade group.

[0007] The driving gear drives the lower driven gear to rotate, and synchronously drives the swing arm to swing, thereby driving the switching blade group to move on the light-through hole to open or close the light-through hole.

[0008] Optionally, the two sides of the reverse side of the fixing seat are respectively provided with a first limiting groove for installing the wide-mouth U iron, a second limiting groove for installing the crank handle, and a third limiting groove for installing the driving gear. The first limiting groove extends from the two sides of the reverse side of the fixing seat to the other two sides, the second limiting groove is located at both ends of the first limiting groove, and the third limiting groove is located at one end of each second limiting groove away from the first limiting groove; the slot depth of the second limiting groove and the third limiting groove is greater than the slot depth of the first limiting groove.

[0009] Optionally, the first limiting groove is provided with a first rotating shaft for fixing the wide-mouth U-iron, the wide-mouth U-iron is provided with a limiting opening, and the limiting opening is sleeved on the first rotating shaft; the first rotating shaft and the fixing seat are integrally formed.

[0010] Optionally, the inner wall of the fixing seat is provided with a plurality of convex ribs for preventing the wide-mouth U-iron from shifting.

[0011] Optionally, the second limiting groove is provided with a second rotating shaft for mounting the crank handle and an arc-shaped hole for the swing arm to pass through, the passive gear is sleeved on the second rotating shaft, the swing arm extends out of the arc-shaped hole and is transmission-connected to the switching blade group; the second rotating shaft and the fixing seat are integrally formed.

[0012] Optionally, the third limiting groove is provided with a third rotating shaft for mounting the driving gear and the magnet, the driving gear is sleeved on the third rotating shaft, and the magnet is sleeved on the driving gear; the third rotating shaft is integrally formed with the fixing seat.

[0013] Optionally, the driving gears and cranks in the two driving mechanisms are centrally symmetrically arranged on both sides of the fixing base.

[0014] Optionally, the switching blade group includes a first switching blade group and a second switching blade group respectively arranged on the front side of the fixed seat, the first switching blade group includes at least an upper main blade and an upper auxiliary blade, the second switching blade group includes at least a lower main blade and a lower auxiliary blade, the upper main blade and the upper auxiliary blade are both connected to one of the cranks for transmission, and the lower main blade and the lower auxiliary blade are both connected to the other crank for transmission, and the upper main blade, the upper auxiliary blade, the lower main blade and the lower auxiliary blade are driven by the crank and can simultaneously move along the fixed seat toward or away from the light-through hole.

[0015] Optionally, a fourth rotating shaft and a fifth rotating shaft for mounting the first switching blade group and the second switching blade group are provided on the front side of the fixing seat.

[0016] Optionally, a fixing cover is further provided on the front side of the fixing seat, and a magnetic valve cover plate and a flexible circuit board are further provided on the back side of the fixing seat.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This application adopts a driving method that combines gear transmission with pendulum shaking, which is independently transmitted through two sets of wires to provide two independent driving forces, thereby improving the stability and sensitivity of the driving handle movement. The improved driving mechanism design increases the static force, thereby enhancing the impact resistance of the shutter switch, so that it can still maintain stable operation when subjected to impact and vibration, and has a longer service life.

[0019] 2. Compared with the existing narrow-mouth U-iron, the wide-mouth U-iron extends the iron bar structure to one side across the entire fixed seat and extends to the adjacent side, thereby increasing the winding length of the winding shaft and enhancing the magnetic field strength.

[0020] 3. Improve the installation position of the magnet and install it between the ends of two adjacent wide-mouth U irons. This setting improves the assembly stability of the magnet. At the same time, the improved wide-mouth U iron and magnet layout helps to provide a more symmetrical magnetic field distribution, more balanced magnetic field strength symmetry, higher static force, better impact resistance, and improved imaging quality.

[0021] 4. By improving the structure and installation method of the iron bar and magnet, the overall thickness of the magnetic valve is reduced, making it more in line with the requirements of miniaturization.

[0022] 5. Improve system transmission stability: Design the drive gear and crank handle to the side of the fixed base instead of the diagonal position. This layout helps to improve the stability of the system transmission and reduce imaging quality problems caused by unstable transmission.

[0023] 6. Optimize the drive component structure: Through the above improvements, the overall structure of the drive component has been optimized, making it more compact and efficient, while also improving its reliability and durability in various working environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of a wide-mouth U-iron thin infrared shutter device according to a preferred embodiment of the present invention;

[0025] Figure 2 This is an exploded view of a wide-mouth U-iron thin infrared shutter device according to a preferred embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the reverse structure of the fixing seat of a preferred embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the front structure of the fixing seat of a preferred embodiment of the utility model;

[0028] Figure 5 This is a schematic structural diagram of the driving mechanism of a preferred embodiment of the utility model;

[0029] Figure 6 This is a schematic diagram of the partial structure of the driving mechanism of a preferred embodiment of the utility model;

[0030] Figure 7 This is a schematic structural diagram of a crank handle in a preferred embodiment of the present utility model;

[0031] In the picture:

[0032] 100. Wide-mouth U-iron thin infrared shutter device;

[0033] 1. Fixing seat; 11. Light hole; 12. First limiting groove; 13. Second limiting groove; 14. Third limiting groove; 15. First rotating shaft; 16. Raised rib; 17. Second rotating shaft; 18. Arc hole; 19. Third rotating shaft; 110. Fourth rotating shaft; 111. Fifth rotating shaft;

[0034] 2. Switch blade group; 21. First switch blade group; 211. Upper main blade; 212. Upper auxiliary blade; 22. Second switch blade group; 221. Lower main blade; 222. Lower auxiliary blade;

[0035] 3. Driving mechanism; 31. Wide-mouth U-iron; 311. Arc-shaped limit slot; 312. Limit opening; 32. Winding group; 33. Magnet; 34. Driving gear; 35. Crank handle; 351. Driven gear; 352. Swing arm; 36. Magnet limit slot;

[0036] 4. Fixed cover;

[0037] 5. Magnetic valve cover;

[0038] 6. Flexible circuit board. DETAILED DESCRIPTION

[0039] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0040] like Figure 1-7 As shown, a wide-mouth U-iron thin infrared shutter device 100 includes a fixing base 1, a switching blade group 2, and a driving mechanism 3; the fixing base 1 is provided with a light-through hole 11, and the switching blade group 2 and the driving mechanism 3 are respectively mounted on the front and back sides of the fixing base 1;

[0041] There are at least two driving mechanisms 3, each of which includes a wide-mouth U iron 31, a winding group 32, a magnet 33, a driving gear 34 and a crank 35. The winding group 32 is wound around the middle of the wide-mouth U iron 31, and the middle of each wide-mouth U iron 31 equipped with the winding group 32 is respectively installed on the two opposite sides of the back side of the fixed seat 1. The two ends of the wide-mouth U iron 31 extend to the other side of the fixed seat 1, and the end of each wide-mouth U iron 31 is provided with an arc-shaped limiting groove 311; two magnets 33 are respectively installed at the ends of two adjacent wide-mouth U irons 31. The magnet 33 is connected to the driving gear 34 in the magnet limiting groove 36 enclosed by the arc-shaped limiting groove 311 at the end, and the rocker 35 is provided with a passive gear 351 and a swing arm 352. The passive gear 351 and the driving gear 34 are engaged with each other, and the swing arm extends from the front of the fixed seat 1 and is connected to the switching blade group 2 in a transmission manner; the driving gear 34 drives the lower passive gear 351 to rotate, and synchronously drives the swing arm 352 to swing, thereby driving the switching blade group 2 to move on the light-through hole 11 to open or close the light-through hole 11.

[0042] This application adopts a driving method that combines gear transmission with pendulum shaking, and independently transmits through two sets of wires to provide two sets of independent driving forces, thereby improving the stability and sensitivity of the movement of the driving handle 35. The improved driving mechanism 3 design increases the static force, thereby enhancing the impact resistance of the shutter switch, so that it can still maintain stable operation when subjected to impact and vibration, and has a longer service life.

[0043] In addition, the wide-mouth U-iron 31 design of the present application has certain uniqueness. Compared with the existing narrow-mouth U-iron, the iron bar structure is extended to one side across the entire fixed seat 1 and extended to the adjacent side, thereby increasing the winding length of the winding shaft and enhancing the magnetic field strength.

[0044] As a further preferred embodiment, the two sides of the reverse side of the fixing seat 1 are respectively provided with a first limiting groove 12 for installing the wide-mouth U iron 31, a second limiting groove 13 for installing the crank handle 35, and a third limiting groove 14 for installing the driving gear 34. The first limiting groove 12 extends from the two sides of the reverse side of the fixing seat 1 to the other two sides, the second limiting groove 13 is located at both ends of the first limiting groove, and the third limiting groove 14 is located at one end of each second limiting groove 13 away from the first limiting groove 12; the slot depth of the second limiting groove 13 and the third limiting groove 14 is greater than the slot depth of the first limiting groove 12.

[0045] This application reasonably designs the positions and recessed structures of the first limiting groove 12, the second limiting groove 13, and the third limiting groove 14, and installs the wide-mouth U iron 31, the crank 35, and the driving gear 34 in an orderly manner in the fixed seat 1, thereby extending the length of the wide-mouth U iron 31 and satisfying the meshing transmission space between the crank 35 and the driving gear 34. The combination is compact and reasonable, and the transmission effect is excellent.

[0046] As a further preferred solution, the first limiting groove 12 is provided with a first rotating shaft 15 for fixing the wide-mouth U iron 31, and the wide-mouth U iron 31 is provided with a limiting opening 312, and the limiting opening 312 is sleeved on the first rotating shaft 15; the first rotating shaft 15 and the fixing seat 1 are integrally formed.

[0047] As a further preferred solution, the inner wall of the fixing seat 1 is provided with a plurality of convex ribs 16 for preventing the wide-mouth U iron 31 from shifting.

[0048] This application designs the first rotating shaft 15 and the convex rib 16, which can be used independently or in combination to effectively improve the assembly stability of the wide-mouth U iron 31, and also meet the impact resistance required by the vehicle-mounted infrared imaging equipment when the car is driving in remote areas, bumpy roads, and complex road conditions, and continue to maintain stable operation.

[0049] As a further preferred solution, the second limiting groove 13 is provided with a second rotating shaft 17 for installing the rocker 35 and an arc-shaped hole 18 for the swing arm 352 to pass through, the passive gear 351 is sleeved on the second rotating shaft 17, and the swing arm 352 extends out of the arc-shaped hole 18 and is transmission-connected to the switching blade group 2; the second rotating shaft 17 and the fixed seat 1 are integrally formed.

[0050] As a further preferred solution, the third limiting groove 14 is provided with a third rotating shaft 19 for installing the driving gear 34 and the magnet 33. The driving gear 34 is sleeved on the third rotating shaft 19, and the magnet 33 is sleeved on the driving gear 34. The third rotating shaft 19 is integrally formed with the fixing seat 1.

[0051] As a further preferred solution, the driving gears 34 and the crank handles 35 in the two driving mechanisms 3 are centrally symmetrically arranged on both sides of the fixing base 1 .

[0052] In this application, the driving gear 34 and the crank 35 are designed to be located on the side of the fixing base 1 rather than at a diagonal position. This layout helps to improve the stability of the system transmission and reduce imaging quality problems caused by unstable transmission.

[0053] As a further preferred embodiment, the switching blade group 2 includes a first switching blade group 21 and a second switching blade group 22 which are respectively arranged on the front side of the fixed seat 1, the first switching blade group 21 includes at least an upper main blade 211 and an upper auxiliary blade 212, and the second switching blade group 22 includes at least a lower main blade 221 and a lower auxiliary blade 222, the upper main blade 211 and the upper auxiliary blade 212 are both transmission connected to one of the cranks 35, and the lower main blade and the lower auxiliary blade 222 are both transmission connected to the other crank 35, and the upper main blade 211, the upper auxiliary blade 212, the lower main blade and the lower auxiliary blade 222 are driven by the crank 35 and can simultaneously move along the fixed seat 1 toward or away from the light hole 11.

[0054] As a further preferred solution, a fourth rotating shaft 110 and a fifth rotating shaft 111 for mounting the first switching blade group 21 and the second switching blade group 22 are provided on the front side of the fixing seat 1 .

[0055] As a further preferred solution, a fixing cover 4 is further provided on the front side of the fixing base 1 , and a magnetic valve cover plate 5 and a flexible circuit board 6 are further provided on the back side of the fixing base 1 .

[0056] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A wide-mouth U-iron thin infrared shutter device, characterized in that: It includes a fixing base, a switching blade group, and a driving mechanism; the fixing base is provided with a light-through hole, and the switching blade group and the driving mechanism are respectively installed on the front and back sides of the fixing base; There are at least two driving mechanisms, each of which includes a wide-mouth U-iron, a winding group, a magnet, a driving gear and a crank. The winding group is wound around the middle of the wide-mouth U-iron, and the middle of each wide-mouth U-iron equipped with a winding group is respectively installed on two opposite sides of the back side of the fixed seat, and the two ends of the wide-mouth U-iron extend to the other side of the fixed seat respectively. The end of each wide-mouth U-iron is provided with an arc-shaped limiting groove; two magnets are respectively installed in the magnet limiting groove enclosed by the arc-shaped limiting grooves at the ends of two adjacent wide-mouth U-irons, and the magnet is connected to the driving gear. A passive gear and a swing arm are provided on the crank, and the passive gear and the driving gear are meshed with each other. The swing arm extends from the front of the fixed seat and is transmission-connected to the switching blade group. The driving gear drives the lower driven gear to rotate, and synchronously drives the swing arm to swing, thereby driving the switching blade group to move on the light-through hole to open or close the light-through hole.

2. The wide-mouth U-iron thin infrared shutter device according to claim 1, characterized in that: The two sides of the reverse side of the fixing seat are respectively provided with a first limiting groove for installing the wide-mouth U iron, a second limiting groove for installing the crank handle, and a third limiting groove for installing the driving gear. The first limiting groove extends from the two sides of the reverse side of the fixing seat to the other two sides, the second limiting groove is located at both ends of the first limiting groove, and the third limiting groove is located at one end of each second limiting groove away from the first limiting groove; the slot depth of the second limiting groove and the third limiting groove is greater than the slot depth of the first limiting groove.

3. The wide-mouth U-iron thin infrared shutter device according to claim 2, characterized in that: The first limiting groove is provided with a first rotating shaft for fixing the wide-mouth U iron, the wide-mouth U iron is provided with a limiting opening, and the limiting opening is sleeved on the first rotating shaft; the first rotating shaft and the fixing seat are integrally formed.

4. The wide-mouth U-iron thin infrared shutter device according to claim 3, characterized in that: The inner wall of the fixing seat is provided with a plurality of convex ribs for preventing the wide-mouth U iron from shifting.

5. The wide-mouth U-iron thin infrared shutter device according to claim 2, characterized in that: The second limiting groove is provided with a second rotating shaft for mounting the crank handle and an arc-shaped hole for the swing arm to pass through; the passive gear is sleeved on the second rotating shaft; the swing arm extends out of the arc-shaped hole and is transmission-connected to the switching blade group; the second rotating shaft and the fixing seat are integrally formed.

6. The wide-mouth U-iron thin infrared shutter device according to claim 2, characterized in that: The third limiting groove is provided with a third rotating shaft for mounting the driving gear and the magnet. The driving gear is sleeved on the third rotating shaft, and the magnet is sleeved on the driving gear. The third rotating shaft is integrally formed with the fixing seat.

7. The wide-mouth U-iron thin infrared shutter device according to any one of claims 1 to 6, characterized in that: The driving gears and the crank handles in the two driving mechanisms are centrally symmetrically arranged on both sides of the fixing base.

8. The wide-mouth U-iron thin infrared shutter device according to any one of claims 1 to 6, characterized in that: The switching blade group includes a first switching blade group and a second switching blade group respectively arranged on the front side of the fixed seat, the first switching blade group includes at least an upper main blade and an upper auxiliary blade, the second switching blade group includes at least a lower main blade and a lower auxiliary blade, the upper main blade and the upper auxiliary blade are both connected to one of the cranks for transmission, and the lower main blade and the lower auxiliary blade are both connected to the other crank for transmission, and the upper main blade, the upper auxiliary blade, the lower main blade and the lower auxiliary blade are driven by the crank and can simultaneously move along the fixed seat toward or away from the light hole.

9. The wide-mouth U-iron thin infrared shutter device according to claim 1, characterized in that: The front side of the fixing seat is provided with a fourth rotating shaft and a fifth rotating shaft for mounting the first switching blade group and the second switching blade group.

10. The wide-mouth U-iron thin infrared shutter device according to any one of claims 1 to 6, characterized in that: A fixing cover is further provided on the front side of the fixing seat, and a magnetic valve cover plate and a flexible circuit board are further provided on the back side of the fixing seat.

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