Multi-blade infrared shutter device with small appearance and narrow frame

Abstract

The utility model discloses a multi-blade infrared shutter device with a small appearance and a narrow frame. The multi-blade infrared shutter device comprises a fixed seat, a multi-blade switching blade group and a driving mechanism, a light through hole is formed in the fixed seat, the multi-blade switching blade group comprises a first switching blade group and a second switching blade group, the first switching blade group at least comprises a first main blade and a first auxiliary blade, and the second switching blade group at least comprises a second main blade and a second auxiliary blade; an annular anti-collision spacer is arranged between the first main blade and the second main blade, the outer ring edge of the annular anti-collision spacer is limited in an inner cavity of the fixing base, and the inner ring edge of the annular anti-collision spacer is matched with the light through hole in shape. The first switching blade set and the second switching blade set are driven by respective driving mechanisms to move close to or away from the light through hole along the fixing base. The multi-blade type infrared shutter device is small in appearance and narrow in frame, the annular full-surrounding type anti-collision spacer is adopted to replace a traditional single-piece type anti-collision spacer, more comprehensive anti-collision protection is provided, the maintenance cost is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of infrared thermal imaging equipment, in particular to a multi-leaf infrared shutter device with a small appearance and a narrow frame. 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] Existing shutter devices are generally composed of multiple groups of blades, each group of blades consisting of multiple blades. The opening and closing of the blades are controlled by a blade rotation structure. When the shutter is closed, the upper shutter blade and the lower shutter blade often collide, rendering the shutter unusable or even causing irreversible damage, thereby increasing many unnecessary maintenance steps and repair costs. To this end, existing shutter devices are provided with anti-collision spacers between the blades. For example, Chinese patent CN215416210U discloses an aperture shutter device provided with an anti-collision spacer. However, the anti-collision spacer is in the shape of an arc and is only installed at the moving end of the blade. The segmentation effect of the anti-collision spacer is not ideal. In particular, after the shutter device has been used for a period of time, the rapid switching of the blades is likely to collide with the anti-collision spacer having a certain thickness, rendering the shutter unusable. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a multi-leaf infrared shutter device with a small appearance and a narrow frame.

[0005] The object of the utility model is achieved by the following technical solution: a multi-leaf infrared shutter device with a small appearance and a narrow frame, comprising a fixing base, a multi-leaf switching blade group, and a driving mechanism; the fixing base is provided with a light-through hole, the multi-leaf switching blade group and the driving mechanism are respectively mounted on the front and back sides of the fixing base; the multi-leaf switching blade group comprises a first switching blade group and a second switching blade group respectively arranged on the front side of the fixing base, the first switching blade group comprises at least a first main blade and a first auxiliary blade, the second switching blade group comprises at least a second main blade and a second auxiliary blade, the first main blade and the first auxiliary blade are both transmission-connected to one of the driving mechanisms, and the second main blade and the second auxiliary blade are both transmission-connected to the other driving mechanism, an annular anti-collision spacer is provided between the first main blade and the second main blade, the outer ring edge of the annular anti-collision spacer is located in the inner cavity of the fixing base, and the inner ring edge of the annular anti-collision spacer is adapted to the shape of the light-through hole; the first switching blade group and the second switching blade group can simultaneously move along the fixing base toward or away from the light-through hole under the drive of their respective driving mechanisms.

[0006] Optionally, a limiting notch and / or a limiting protrusion is provided along the outer ring of the annular anti-collision spacer, and a limiting protrusion or / and a limiting groove that is adapted to the shape of the limiting notch is provided on the inner cavity wall of the fixing seat.

[0007] Optionally, the first switching blade group and the second switching blade group are respectively installed on both sides of the front of the fixed seat, and the bottom wall of the fixed seat is protruding with multiple supporting parts, which are evenly distributed on the side away from the first switching blade group and are used to support the annular anti-collision spacer. The height of the supporting part is greater than the total thickness of the three blades: the first main blade, the first upper blade, and the first lower blade.

[0008] Optionally, there are two driving mechanisms, each of which includes an L-shaped iron sheet, a winding group, a magnet, and a crank. One section of the L-shaped iron sheet is a winding section, and the other section is a limiting section. The winding group is wound around the winding section of the L-shaped iron sheet. The limiting section of the L-shaped iron sheet is limited to the opposite side of the fixed seat. The ends of the L-shaped iron sheets are provided with arc-shaped limiting grooves; two magnets are respectively installed in the magnet limiting grooves formed by the arc-shaped limiting grooves at the ends of two adjacent L-shaped iron sheets, and the magnet is connected to the crank. The crank extends out of the front of the fixed seat and is transmission-connected to the multi-leaf switching blade group.

[0009] Optionally, the fixing seat is provided with a first rotating shaft for mounting the crank and an arc-shaped hole for the crank to pass through, the crank is sleeved on the first rotating shaft, and the swing arm on the crank extends out of the arc-shaped hole and is transmission-connected to the multi-leaf switching blade group; the first rotating shaft and the fixing seat are integrally formed.

[0010] Optionally, the fixing seat is provided with a second rotating shaft for fixing the L-shaped iron sheet, the L-shaped iron sheet is provided with a limiting opening, and the limiting opening is sleeved on the second rotating shaft; the second rotating shaft and the fixing seat are integrally formed.

[0011] Optionally, the fixing seat is provided with a third rotating shaft for mounting the first switching blade group and a fourth rotating shaft for mounting the second switching blade group; each blade on the first switching blade group and the second switching blade group is provided with a rotating shaft hole and an arc-shaped hole; there are two third rotating shafts, the first main blade is mounted on one of the third rotating shafts through the rotating shaft hole, and the first auxiliary blade is mounted on the other third rotating shaft through the rotating shaft hole; there are two fourth rotating shafts, the second main blade is mounted on one of the fourth rotating shafts through the rotating shaft hole, and the second auxiliary blade is mounted on the other fourth rotating shaft through the rotating shaft hole.

[0012] Optionally, the magnets and cranks in the two driving mechanisms are arranged at diagonal positions of the fixing seat.

[0013] Optionally, a fixing cover is further provided on the front side of the fixing seat.

[0014] Optionally, a magnetic valve cover plate and a flexible circuit board are further provided on the reverse side of the fixing seat.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. Enhanced anti-collision effect and reduced maintenance costs: This application uses an annular, fully enclosed anti-collision spacer instead of a traditional single-piece anti-collision spacer to provide more comprehensive anti-collision protection, reduce direct collisions between blades, thereby reducing damage to the blades, reducing the probability of damage to the shutter device, reducing maintenance costs and repair steps, improving the reliability of the shutter device during rapid switching, ensuring its stable operation under various usage conditions, and helping to extend the service life of the shutter device. 2. Improved assembly stability: The anti-collision spacer is designed with mounting structures such as limiting notches or limiting protrusions to enable it to adapt to the inner cavity wall of the fixing seat, thereby improving assembly stability.

[0017] 3. Optimize the opening and closing control of the blades: The support part is designed to support the anti-collision spacer, which helps to more accurately control the opening and closing of the blades and improve the overall performance of the shutter device.

[0018] 4. Improve manufacturing precision: By improving the structure and assembly method of the anti-collision spacer, the movement of the blades can be controlled more accurately, thereby improving the manufacturing precision of the shutter device.

[0019] 5. Compared to existing U-shaped iron bars, the long L-shaped iron sheet extends the iron bar structure and narrows the width of the entire frame of the fixing base. This makes the shutter structure smaller and the frame extremely narrow, increasing the aperture diameter, saving space, improving the space utilization of the shutter switch, and enhancing product performance. In addition, the winding section of the long L-shaped iron sheet increases the winding length of the winding shaft, thereby enhancing magnetic field strength, making machine winding more convenient, and improving production efficiency.

[0020] 6. This application adopts a dual pendulum drive structure, 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 drive 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a multi-leaf infrared shutter device with a small appearance and narrow frame in a preferred embodiment of the present invention;

[0022] Figure 2 This is an exploded view of a multi-leaf infrared shutter device with a small appearance and narrow frame in a preferred embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the front structure of the fixing seat of a preferred embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram of the reverse structure of the fixing seat of a preferred embodiment of the utility model;

[0025] Figure 5 This is a partial disassembly diagram of a multi-leaf infrared shutter device with a small appearance and narrow frame according to a preferred embodiment of the present invention;

[0026] Figure 6 Another partial disassembled schematic diagram of the multi-leaf infrared shutter device with a small appearance and narrow frame according to the preferred embodiment of the present invention;

[0027] Figure 7 This is a structural diagram of a ring-shaped anti-collision spacer in a preferred embodiment of the present utility model;

[0028] Figure 8 This is a schematic diagram of the partial structure of the driving mechanism of a preferred embodiment of the utility model;

[0029] In the picture:

[0030] 100. Multi-leaf infrared shutter device with small size and narrow frame;

[0031] 1. Fixing seat; 11. Light hole; 12. Limiting protrusion; 13. Limiting groove; 14. Support part; 15. First rotating shaft; 16. Arc hole; 17. Second rotating shaft; 18. Third rotating shaft; 19. Fourth rotating shaft;

[0032] 2. Multi-leaf switching blade group; 21. First switching blade group; 211. First main blade; 212. First upper blade; 213. First lower blade; 22. Second switching blade group; 221. Second main blade; 222. Second upper blade; 223. Second lower blade;

[0033] 3. Driving mechanism; 31. L-shaped iron sheet; 311. Arc-shaped limit groove; 312. Limit opening; 32. Winding group; 33. Magnet; 34. Crank handle;

[0034] 4. Annular anti-collision spacer; 41. Positioning notch; 42. Positioning protrusion; 43. Rotating shaft hole; 44. Arc hole;

[0035] 5. Fixed cover;

[0036] 6. Magnetic valve cover;

[0037] 7. Flexible circuit board. DETAILED DESCRIPTION

[0038] 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.

[0039] like Figure 1-8As shown, a multi-leaf infrared shutter device 100 with a small shape and narrow frame includes a fixing base 1, a multi-leaf switching blade group 2, and a driving mechanism 3; the fixing base 1 is provided with a light-through hole 11, and the multi-leaf switching blade group 2 and the driving mechanism 3 are respectively installed on the front and back sides of the fixing base 1; the multi-leaf switching blade group 2 includes a first switching blade group 21 and a second switching blade group 22 respectively arranged on the front side of the fixing base 1, the first switching blade group 21 includes a first main blade 211, a first upper blade 212, and a first lower blade 213, the second switching blade group 22 includes a second main blade 221, a second upper blade 222, and a second lower blade 223, the first main blade 211, The first upper blade 212 and the first lower blade 213 are both connected to one of the driving mechanisms 3 for transmission, and the second main blade 221, the second upper blade 222, and the second lower blade 223 are all connected to the other driving mechanism 3 for transmission. An annular anti-collision spacer 4 is arranged between the first main blade 211 and the second main blade 221, and the outer ring edge of the annular anti-collision spacer 4 is located in the inner cavity of the fixed seat 1, and the inner ring edge of the annular anti-collision spacer 4 is adapted to the shape of the light-through hole 11; the upper main blade, the upper auxiliary blade, the lower main blade and the lower auxiliary blade are driven by the driving mechanism 3, and can simultaneously move along the fixed seat 1 toward or away from the light-through hole 11.

[0040] This application provides more comprehensive anti-collision protection by adopting an annular full-surround anti-collision spacer instead of the traditional single-piece anti-collision spacer, reducing direct collisions between blades, thereby reducing damage to the blades, reducing the probability of damage to the shutter device, reducing maintenance costs and maintenance steps, improving the reliability of the shutter device during rapid switching, ensuring its stable operation under various usage conditions, and helping to extend the service life of the shutter device.

[0041] In addition, the present application adopts a dual pendulum drive structure, which is independently transmitted through two sets of wires to provide two sets of independent driving forces, thereby improving the stability and sensitivity of the driving movement. 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.

[0042] As a further preferred embodiment, the outer ring of the annular anti-collision spacer 4 is provided with a limiting notch 41 and / or a limiting protrusion 42. The inner wall of the fixing seat 1 is provided with a convex limiting protrusion 12 that matches the shape of the limiting notch 41 and / or a concave limiting groove 13 that matches the shape of the limiting protrusion 42. In addition, the annular anti-collision spacer 4 is also provided with a rotating shaft hole 43 and an arc-shaped hole 44.

[0043] The present application designs mounting structures such as limiting notches 41 or limiting protrusions 42 on the anti-collision spacer, so that it can adapt to the inner cavity wall of the fixing seat 1, thereby improving the stability of assembly.

[0044] As a further preferred solution, the first switching blade group 21 and the second switching blade group 22 are respectively installed on both sides of the front of the fixed seat 1, and the bottom wall of the fixed seat 1 is protruding with multiple supporting parts 14, which are evenly distributed on the side away from the first switching blade group 21 and are used to support the annular anti-collision spacer 4. The height of the supporting part 14 is greater than the total thickness of the first main blade 211 and the first auxiliary blade.

[0045] The support portion 14 designed in the present application is used to support the anti-collision spacer, which helps to more accurately control the opening and closing of the blades and improve the overall performance of the shutter device.

[0046] As a further preferred embodiment, there are two driving mechanisms 3, each of which includes an L-shaped iron sheet 31, a winding group 32, a magnet 33, and a crank 34. One section of the L-shaped iron sheet 31 is a winding section, and the other section is a limiting section. The winding group 32 is wound around the winding section of the L-shaped iron sheet 31, and the limiting section of the L-shaped iron sheet 31 is limited to the opposite side of the fixed seat 1. The ends of the L-shaped iron sheet 31 are each provided with an arc-shaped limiting groove 311; two magnets 33 are respectively installed in the magnet limiting groove enclosed by the arc-shaped limiting grooves 311 at the ends of two adjacent L-shaped iron sheets 31, and the magnet 33 is connected to the crank 34. The crank 34 extends out from the front of the fixed seat 1 and is transmission-connected to the multi-leaf switching blade group 2.

[0047] Compared to the existing U-shaped iron strip, the long L-shaped iron strip 31 of the present application extends the iron strip structure and narrows the width of the entire frame of the fixing base 1, making the shutter structure smaller in size and extremely narrow in frame, increasing the aperture of the light hole 11, saving space, improving the space utilization of the shutter switch, and enhancing product performance. In addition, the winding section of the long L-shaped iron strip 31 increases the winding length of the winding shaft, thereby enhancing the magnetic field strength, making it more convenient for machine winding, and improving production efficiency.

[0048] As a further preferred embodiment, the fixing seat 1 is provided with a first rotating shaft 15 for mounting the crank 34 and an arc-shaped hole 16 for the crank 34 to pass through. The crank 34 is sleeved on the first rotating shaft 15, and the swing arm on the crank 34 extends out of the arc-shaped hole 16 and is transmission-connected to the multi-leaf switching blade group; the first rotating shaft 15 and the fixing seat 1 are integrally formed.

[0049] As a further preferred embodiment, the fixing seat 1 is provided with a second rotating shaft 17 for fixing the L-shaped iron sheet 31, and the L-shaped iron sheet 31 is provided with a limiting opening 312, and the limiting opening 312 is sleeved on the second rotating shaft 17; the second rotating shaft 17 and the fixing seat 1 are integrally formed.

[0050] As a further preferred embodiment, the fixed seat is provided with a third rotating shaft 18 for installing the first switching blade group 21 and a fourth rotating shaft 19 for installing the second switching blade group 22; each blade on the first switching blade group 21 and the second switching blade group 22 is provided with a rotating shaft hole and an arc hole; there are two third rotating shafts 18, the first main blade 211 is installed on one of the third rotating shafts 18 through the rotating shaft hole, and the first upper blade 212 and the first lower blade 213 are both installed on the other third rotating shaft 18 through the rotating shaft hole, and there are two fourth rotating shafts 19, the second main blade 221 is installed on one of the fourth rotating shafts 19 through the rotating shaft hole, and the second upper blade 222 and the second lower blade 223 are both installed on the other fourth rotating shaft 19 through the rotating shaft hole.

[0051] As a further preferred solution, the magnets 33 and the cranks 34 in the two driving mechanisms 3 are arranged at diagonal positions of the fixing base 1 .

[0052] As a further preferred solution, a fixing cover 5 is further provided on the front side of the fixing base 1 .

[0053] As a further preferred solution, a magnetic valve cover plate 6 and a flexible circuit board 7 are further provided on the reverse side of the fixing seat 1 .

[0054] 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 multi-leaf infrared shutter device with a small size and narrow frame, characterized in that: The multi-leaf switching blade group includes a fixed seat, a multi-leaf switching blade group, and a driving mechanism; the fixed seat is provided with a light-through hole, and the multi-leaf switching blade group and the driving mechanism are respectively installed on the front and back sides of the fixed seat; the multi-leaf 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 a first main blade and a first auxiliary blade, the second switching blade group includes at least a second main blade and a second auxiliary blade, the first main blade and the first auxiliary blade are both transmission-connected to one of the driving mechanisms, and the second main blade and the second auxiliary blade are both transmission-connected to the other driving mechanism, an annular anti-collision spacer is provided between the first main blade and the second main blade, the outer ring edge of the annular anti-collision spacer is located in the inner cavity of the fixed seat, and the inner ring edge of the annular anti-collision spacer is adapted to the shape of the light-through hole; the first switching blade group and the second switching blade group can simultaneously move along the fixed seat toward or away from the light-through hole under the drive of their respective driving mechanisms.

2. The multi-leaf infrared shutter device with a small size and narrow frame as claimed in claim 1, characterized in that: The outer ring of the annular anti-collision spacer is provided with a limiting notch and / or a limiting protrusion along the edge, and the inner cavity wall of the fixing seat is provided with a limiting protrusion that is adapted to the shape of the limiting notch and / or a limiting groove that is adapted to the shape of the limiting protrusion.

3. The multi-leaf infrared shutter device with a small size and narrow frame as claimed in claim 1, characterized in that: The first switching blade group and the second switching blade group are respectively installed on both sides of the front of the fixed seat. The bottom wall of the fixed seat is protruding with multiple supporting parts, which are evenly distributed on the side away from the first switching blade group and are used to support the annular anti-collision spacer. The height of the supporting part is greater than the total thickness of the first main blade and the first auxiliary blade.

4. The multi-leaf infrared shutter device with a small size and narrow frame as claimed in claim 1, characterized in that: There are two driving mechanisms, each of which includes an L-shaped iron sheet, a winding group, a magnet, and a crank. One section of the L-shaped iron sheet is a winding section, and the other section is a limiting section. The winding group is wound around the winding section of the L-shaped iron sheet, and the limiting section of the L-shaped iron sheet is limited to the opposite side of the fixed seat. The ends of the L-shaped iron sheets are provided with arc-shaped limiting grooves; two magnets are respectively installed in the magnet limiting grooves enclosed by the arc-shaped limiting grooves at the ends of two adjacent L-shaped iron sheets, and the magnet is connected to the crank, which extends out of the front of the fixed seat and is transmission-connected to the multi-leaf switching blade group.

5. The multi-leaf infrared shutter device with a small size and narrow frame as claimed in claim 4, characterized in that: The fixing seat is provided with a first rotating shaft for mounting the crank and an arc-shaped hole for the crank to pass through. The crank is sleeved on the first rotating shaft, and the swing arm on the crank extends out of the arc-shaped hole and is transmission-connected to the multi-leaf switching blade group; the first rotating shaft and the fixing seat are integrally formed.

6. The multi-leaf infrared shutter device with a small size and narrow frame as claimed in claim 4, characterized in that: The fixing seat is provided with a second rotating shaft for fixing the L-shaped iron sheet. The L-shaped iron sheet is provided with a limiting opening, and the limiting opening is sleeved on the second rotating shaft; the second rotating shaft and the fixing seat are integrally formed.

7. The multi-leaf infrared shutter device with a small size and narrow frame as claimed in claim 4, characterized in that: The fixing seat is provided with a third rotating shaft for installing the first switching blade group and a fourth rotating shaft for installing the second switching blade group; each blade on the first switching blade group and the second switching blade group is provided with a rotating shaft hole and an arc-shaped hole; there are two third rotating shafts, the first main blade is installed on one of the third rotating shafts through the rotating shaft hole, and the first auxiliary blade is installed on the other third rotating shaft through the rotating shaft hole; there are two fourth rotating shafts, the second main blade is installed on one of the fourth rotating shafts through the rotating shaft hole, and the second auxiliary blade is installed on the other fourth rotating shaft through the rotating shaft hole.

8. The multi-leaf infrared shutter device with a small size and narrow frame as claimed in claim 4, characterized in that: The magnets and cranks in the two driving mechanisms are arranged at diagonal positions of the fixing seat.

9. The multi-leaf infrared shutter device with a small appearance and narrow frame according to any one of claims 1 to 8, characterized in that: A fixing cover is also provided on the front of the fixing seat.

10. The multi-leaf infrared shutter device with a small appearance and narrow frame according to any one of claims 1 to 8, characterized in that: A magnetic valve cover plate and a flexible circuit board are also provided on the reverse side of the fixing seat.

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