A fast focusing device for underwater high-speed photography

Abstract

The invention belongs to the technical field of focusing devices, and discloses a fast focusing device for underwater high-speed photography, comprising a focusing protection seat, a focusing device connecting seat being arranged directly below the focusing protection seat, a connecting card seat being arranged directly below the focusing device connecting seat, an annular outer convex ring being arranged around the bottom of the connecting card seat, and further comprising: a focusing device outer shell being arranged at the bottom of the annular outer convex ring, and the two being sealed and connected; a focus double adjustment component being arranged in the focusing device outer shell, and the focus double adjustment component and the focusing device outer shell being rotatably connected; the invention greatly improves the functionality of the focusing device, the focus double adjustment component can realize manual and electric relay coordinated use, the two share the same set of adjustment components, and when manually adjusting, the focus inner cylinder and the focusing device outer shell are rotated, thereby realizing the movement of the focus inner cylinder and the focus adjustment convex lens.

Description

Technical Field

[0001] The invention belongs to the technical field of focusing devices, and in particular relates to a fast focusing device for underwater high-speed photography. Background Art

[0002] In accordance with the requirements for high image quality of digital cameras, with the large-scale image pickup elements and the popularization of mirrorless cameras with short flange back, there is a strong demand for high optical performance and miniaturization of photographic lenses. After the above requirements are met, there is still the problem of preferably using an inner focus type lens. That is, the inner focus type lens is suitable for reducing the diameter and weight of the focus lens, so it can improve the focusing speed and focusing accuracy.

[0003] The Chinese patent publication number is CN100578278C, which discloses an optical focusing device, including a seat, a sleeve axially connected to the seat, a lens threadedly connected to the sleeve, and a piezoelectric actuator fixed in the seat to contact and drive the sleeve to rotate. The seat and the lens are respectively provided with a first guide part and a second guide part for corresponding positioning and sliding, so that the sleeve can be driven to rotate to drive the lens to focus. The optical focusing device with simple components improves the driving force and overcomes the disadvantages of complex components in the prior art.

[0004] The Chinese patent publication number cited is: CN209746243U, which discloses a zoom or focus device installed on a lens barrel, including an adjustment shaft and a guide sleeve sleeved on the adjustment shaft, one end of the adjustment shaft is provided with a driving gear for driving the lens to zoom or focus, and the other end of the adjustment shaft is provided with a knob, and the guide sleeve is provided with a sealing installation structure, which includes an external thread, a first sealing installation groove and a first sealing ring, and the adjustment shaft is provided with a second sealing installation groove, and the second sealing installation groove is sleeved with a second sealing ring. The zoom or focus device, because the first sealing ring is provided on the outside of the guide sleeve, can avoid water leakage accidents caused by the guide sleeve being not tightened or accidentally loosened due to human negligence, and is therefore safer and more reliable: at the same time, a second sealing ring and a retaining spring are provided on the outside of the adjustment shaft, and the driving gear can be pulled out to install the lens, which is more convenient to use.

[0005] However, the above-mentioned existing focusing devices often rely too much on automatic focus when in use. In fact, when taking underwater photos, due to the different densities of water and air, light will be refracted and reflected in water, and will be absorbed by certain substances in water. Therefore, the focusing light in water is obviously different from that in air, and the time taken is also different. There may be situations where the user needs to manually adjust the focus, and it is difficult to match the same focusing structure manually and electrically at the same time, and it is difficult to achieve the relay use of the two, and the connectivity is poor, resulting in a long adaptation process for users to take underwater photos, which is not conducive to the progress of work;

[0006] At the same time, the existing equipment does not have a cooling structure. When the photographic equipment is used for a long time, due to the repeated reciprocating movement of the focusing structure and the entire equipment being completely immersed in water, the large temperature difference will cause fog to appear inside the equipment, thereby further prolonging the focusing time and affecting normal shooting. For this reason, we propose a fast focusing device for underwater high-speed photography. Summary of the invention

[0007] The object of the present invention is to provide a fast focusing device for underwater high-speed photography to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: a fast focusing device for underwater high-speed photography, comprising a focus protection seat, a focus device connecting seat is provided directly below the focus protection seat, a connecting card seat is provided directly below the focus device connecting seat, and an annular outer convex ring is provided around the bottom of the connecting card seat, and further comprising:

[0009] The outer shell of the focusing device is arranged at the bottom of the annular outer convex ring, and the two are sealed and connected;

[0010] The dual-focus adjustment component is disposed in the outer shell of the focusing device, and the dual-focus adjustment component is rotatably connected to the outer shell of the focusing device;

[0011] The dual-adjustment focus assembly includes a focus inner cylinder, a dual-adjustment rotating assembly, and an exhaust anti-fog assembly. The focus inner cylinder is a hollow cylindrical structure, and the focus inner cylinder and the focus device outer shell are arranged with the same center.

[0012] Preferably, the outer wall of the focusing inner cylinder is provided with a second limited external thread, the inner wall of the focusing device outer shell is provided with a first limited internal thread, and the second limited external thread is used in conjunction with the first limited internal thread.

[0013] Preferably, a focus adjustment convex lens is connected to the focus inner cylinder via a plurality of linkage pillars, and the focus adjustment convex lens and the focus inner cylinder are arranged at the same center. When the focus inner cylinder moves, the focus adjustment convex lens moves together with the focus inner cylinder.

[0014] The dual-adjustment rotating assembly is arranged at the top of the inner wall of the focusing inner cylinder, a recessed inner cavity is provided on the inner wall of the focusing inner cylinder near the position of the dual-adjustment rotating assembly, and a driving tooth set is provided on the inner wall of the recessed inner cavity.

[0015] Preferably, the dual-adjustment rotating assembly comprises a driving motor, a driving gear is provided in the output shaft direction of the driving motor, a rotating bottom shaft is rotatably connected to the bottom of the driving gear, a bottom shaft connecting plate is provided on the outer side wall of the rotating bottom shaft, and the rotating bottom shaft is connected to the inner wall of the focusing inner cylinder through the bottom shaft connecting plate;

[0016] The driving gear is meshingly connected with the driving tooth set;

[0017] An L-shaped positioning plate is provided on the top of the driving motor, and a rectangular inner slide groove is provided on the inner wall of the focusing device outer shell for use with the L-shaped positioning plate, and the height of the rectangular inner slide groove is smaller than the height of the focusing device outer shell, one end of the L-shaped positioning plate exceeds the outer wall of the focusing inner cylinder and is located in the rectangular inner slide groove, and a gap is provided between the end of the L-shaped positioning plate and the curved inner wall of the rectangular inner slide groove.

[0018] Preferably, a sealing rubber convex ring is provided on the outer wall of the focusing inner cylinder, and the sealing rubber convex ring is located at the top of the second limiting external thread;

[0019] A protective adjustment lens is provided in the focusing inner cylinder, and the protective adjustment lens is connected to the inner wall of the annular outer convex ring through an extended built-in lens. When the focusing inner cylinder moves, the protective adjustment lens is in a stationary state through the extended built-in lens, and the distance between the protective adjustment lens and the focusing adjustment convex lens changes accordingly;

[0020] A gap is provided between the lengthened built-in lens and the linkage support;

[0021] The focus adjustment convex lens, the protective adjustment lens, the focus inner cylinder and the focus device outer shell are all arranged with the same center, and a device inner cavity is formed in the focus inner cylinder near the focus adjustment convex lens and the protective adjustment lens.

[0022] Preferably, the air-evacuation anti-fog component is arranged at the bottom of the outer ring of the focusing inner cylinder, and the air-evacuation anti-fog component is a hollow circular ring structure. At least one built-in shell is provided in the air-evacuation anti-fog component, and one side of each built-in shell is connected to the second air supply port, and the other side of the built-in shell is connected to the anti-backflow air supply channel.

[0023] Preferably, an air suction fan is provided in the built-in shell;

[0024] A recessed arc-shaped ring seat is provided in the anti-backflow air supply duct at a position close to the air intake fan, and an anti-backflow gasket parallel to the recessed arc-shaped ring seat is provided in the anti-backflow air supply duct, a sealing arc gasket is provided between the anti-backflow gasket and the recessed arc-shaped ring seat, and the sealing arc gasket is used in conjunction with the recessed arc-shaped ring seat, and a sealing spring is provided on the outer ring sleeve of the sealing arc gasket, wherein the anti-backflow gasket is formed with a first air supply port near the middle of the sealing arc gasket.

[0025] Preferably, the end of the sealing arc gasket is a hemispherical structure, a through hole is formed in the middle of the recessed arc ring seat, and the cross-section of the recessed arc ring seat through hole is a hemispherical recess. When the sealing arc gasket is connected to the recessed arc ring seat, the two fit tightly.

[0026] Preferably, the sealing arc gasket is made of rubber. When the flat side wall of the sealing arc gasket is subjected to force, the force will be transmitted to the curved side wall of the sealing arc gasket, so that the sealing arc gasket fits tightly with the recessed arc ring seat, thereby closing the through hole in the middle of the recessed arc ring seat.

[0027] Preferably, a focus adjustment lens is provided in the connecting card seat, and the focus protection seat, the focus device connecting seat and the connecting card seat are all sealed structures after being connected.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention greatly improves the functionality of the focusing device. The dual-adjustment component for focusing can be used in a manual and electric relay. The two use the same set of adjustment components. When adjusting manually, the focus inner cylinder and the outer shell of the focus device rotate to realize the movement of the focus inner cylinder and the focus adjustment convex lens. When adjusting electrically, the focus inner cylinder and the outer shell of the focus device also rotate to realize the movement of the focus inner cylinder and the focus adjustment convex lens. It is also possible to manually move one-third of the distance and then use the electric relay to move the remaining two-thirds of the distance. The two are convenient to connect and use, so that the user can quickly adapt and use them underwater, which indirectly improves the focusing speed and saves time.

[0030] The dual adjustment rotating assembly can realize relative movement between the focus inner cylinder and the focus device outer shell, thereby changing the position of the focus adjustment convex lens, and focusing operation can be performed. Multiple driving motors are running, and the driving motor drives the driving gear to rotate together, and the driving gear is meshed with the driving gear group, so that the driving gear group and the focus inner cylinder are rotated. Since the focus inner cylinder and the focus device outer shell are threadedly connected, when the focus inner cylinder and the focus device outer shell rotate, the focus inner cylinder can change its displacement, and then drive the focus adjustment convex lens to change its displacement, and then achieve the effect of adjusting the focus, and it can be used manually. When used manually: only need to rotate the focus inner cylinder to realize the change of displacement of the focus inner cylinder and the focus device outer shell, and similarly drive the focus adjustment convex lens to change its displacement, that is, to achieve the effect of adjusting the focus.

[0031] The rotating bottom shaft is rotatably connected to the driving gear, and the rotating bottom shaft can offset the number of rotations of the driving gear, so that during the operation of the driving gear, the driving gear and the driving motor are always fixed at the top position of the inner wall of the focusing inner cylinder, so that the driving gear is always in a meshing state with the driving tooth group, and manual rotation of the focusing inner cylinder will not cause damage to the structure of the double-adjusting rotating assembly, and the two rotation methods can be used in relay.

[0032] The functionality of the focusing device can be further improved by using an air extraction and anti-fog component. The air extraction and anti-fog component is a hollow ring structure. At least one built-in shell is provided in the air extraction and anti-fog component, and one end of the built-in shell is connected to the inner cavity of the device through a second air supply port. When performing underwater operations, the suction fan can be operated, and the suction fan continuously sucks air from the inner cavity of the device and outputs it through the anti-backflow air supply duct. In this process, the focusing device can be cooled, the temperature in the inner cavity of the device can be reduced, and the fog in the inner cavity of the device can be discharged. At the same time, the anti-backflow air supply duct is provided with an anti-backflow setting, so that when the gas is discharged from the focusing device, the external water source will not enter the device from the exhaust port. The use is very convenient and the degree of automation is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention;

[0034] Figure 2 It is a schematic diagram of the bottom view of the present invention;

[0035] Figure 3 An exploded view of the present invention;

[0036] Figure 4 It is an exploded view of the dual-adjustment focus assembly of the present invention;

[0037] Figure 5 A three-dimensional diagram of a focus adjustment convex lens of the present invention;

[0038] Figure 6It is a third perspective view of the second limiting external thread of the present invention;

[0039] Figure 7 A top view of the focusing inner cylinder of the present invention;

[0040] Figure 8 A cutaway perspective view of a driving tooth assembly of the present invention;

[0041] Fig. 9 It is a sectional stereoscopic view of a first limiting internal thread of the present invention;

[0042] Fig.10 A three-dimensional diagram of a dual-adjustable rotating assembly of the present invention;

[0043] Fig.11 It is a cross-sectional view from the main perspective of the present invention;

[0044] Fig.12 For the present invention Fig.12 Enlarged view of point A in the middle;

[0045] Fig.13 It is a schematic diagram of aperture adjustment displacement of the present invention;

[0046] In the figure:

[0047] 100. Focus protection seat;

[0048] 200, focusing device connection seat;

[0049] 300, focus adjustment lens;

[0050] 400, connecting seat; 401, annular outer convex ring;

[0051] 500, outer shell of focusing device; 501, rectangular inner slide groove; 502, first limiting inner thread;

[0052] 600, focus dual adjustment assembly; 601, focus adjustment convex lens; 602, recessed inner cavity; 603, focus inner cylinder; 604, second limited external thread; 605, protection adjustment lens; 606, extended built-in lens; 607, drive gear set; 608, sealing rubber convex ring; 609, device inner cavity; 610, linkage support;

[0053] 620, double adjustment rotating assembly; 621, rotating bottom shaft; 622, bottom shaft connecting plate; 623, driving gear; 624, driving motor; 625, L-shaped positioning plate;

[0054] 630, exhaust anti-fog assembly; 631, anti-backflow air supply duct; 632, anti-backflow gasket; 633, first air supply port; 634, sealing spring; 635, sealing arc gasket; 636, built-in shell; 637, suction fan; 638, second air supply port; 639, recessed arc ring seat. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] See also Figures 1 to 13 The present invention provides a technical solution: a fast focusing device for underwater high-speed photography, comprising a focus protection seat 100, a focus device connecting seat 200 is provided directly below the focus protection seat 100, a connecting card seat 400 is provided directly below the focus device connecting seat 200, and an annular outer convex ring 401 is provided around the bottom of the connecting card seat 400, and further comprising:

[0057] The focusing device outer shell 500 is arranged at the bottom of the annular outer convex ring 401, and the two are sealed and connected;

[0058] The dual focus adjustment component 600 is disposed in the outer shell 500 of the focus device, and the dual focus adjustment component 600 is rotatably connected to the outer shell 500 of the focus device;

[0059] The dual-adjustment focus assembly 600 includes a focus inner cylinder 603, a dual-adjustment rotating assembly 620, and an air extraction anti-fog assembly 630. The focus inner cylinder 603 is a hollow cylindrical structure, and the focus inner cylinder 603 and the focus device outer shell 500 are arranged with the same center.

[0060] The present invention greatly improves the functionality of the focusing device. The dual-adjustment focusing component 600 can be used in a manual and electric relay. The two use the same set of adjustment components. When manually adjusting, the focusing inner cylinder 603 and the focusing device outer shell 500 rotate to achieve the movement of the focusing inner cylinder 603 and the focusing adjustment convex lens 601; when electrically adjusting, the focusing inner cylinder 603 and the focusing device outer shell 500 also rotate to achieve the movement of the focusing inner cylinder 603 and the focusing adjustment convex lens 601; it is also possible to manually move one-third of the distance, and then the electric relay will move the remaining two-thirds of the distance. The two are convenient to connect and use, so that the user can quickly adapt and use them underwater, which indirectly improves the focusing speed and saves time.

[0061] In this embodiment, preferably, Figure 4 , Figure 5 , Figure 6 , Fig. 9 The outer wall of the focusing inner cylinder 603 is provided with a second limited external thread 604 , the inner wall of the focusing device outer shell 500 is provided with a first limited internal thread 502 , and the second limited external thread 604 is used in conjunction with the first limited internal thread 502 .

[0062] The focusing inner cylinder 603 and the focusing device outer shell 500 are rotated to adjust the displacement through the second limited external thread 604 and the first limited internal thread 502. At the same time, the focusing inner cylinder 603 can be rotated manually or automatically by the device, and the two can be used in relay cooperation.

[0063] In this embodiment, preferably, Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.11 The focus inner cylinder 603 is connected with a focus adjustment convex lens 601 through a plurality of linkage pillars 610, and the focus adjustment convex lens 601 and the focus inner cylinder 603 are arranged at the same center. When the focus inner cylinder 603 moves, the focus adjustment convex lens 601 moves together with the focus inner cylinder 603;

[0064] The dual adjustment rotating assembly 620 is disposed at the top of the inner wall of the focusing inner cylinder 603 . A recessed inner cavity 602 is provided on the inner wall of the focusing inner cylinder 603 near the dual adjustment rotating assembly 620 . A driving tooth set 607 is provided on the inner wall of the recessed inner cavity 602 .

[0065] The focus adjustment convex lens 601 is fixed in the focus inner cylinder 603 through the linkage support 610 , and the focus adjustment convex lens 601 moves with the focus inner cylinder 603 .

[0066] The position of the dual adjustment rotating assembly 620 can be found in Figure 6 , Figure 8 , Fig. 9 The specific structure and shape of the dual adjustment rotating assembly 620 can be found in Fig.10 .

[0067] By using the dual adjustment rotating assembly 620, the relative movement between the focus inner cylinder 603 and the focus device outer shell 500 can be achieved, thereby changing the position of the focus adjustment convex lens 601, and focusing operation can be performed. Multiple driving motors 624 are in operation, and the driving motor 624 drives the driving gear 623 to rotate together, and the driving gear 623 is meshed and connected with the driving gear group 607, so that the driving gear group 607 and the focus inner cylinder 603 are rotated. Since the focus inner cylinder 603 and the focus device outer shell 500 are threadedly connected, when the focus inner cylinder 603 and the focus device outer shell 500 rotate, the focus inner cylinder 603 can change its displacement, and then drive the focus adjustment convex lens 601 to change its displacement, and then achieve the effect of adjusting the focus, and it can be used manually. When used manually: only need to rotate the focus inner cylinder 603 to achieve the focus inner cylinder 603 and the focus device outer shell 500 change displacement, similarly drive the focus adjustment convex lens 601 to change displacement, that is, achieve the effect of adjusting the focus.

[0068] In this embodiment, preferably, Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 The dual adjustment rotating assembly 620 includes a driving motor 624, a driving gear 623 is provided in the output shaft direction of the driving motor 624, a rotating bottom shaft 621 is rotatably connected to the bottom of the driving gear 623, a bottom shaft connecting plate 622 is provided on the outer wall of the rotating bottom shaft 621, and the rotating bottom shaft 621 is connected to the inner wall of the focusing inner cylinder 603 through the bottom shaft connecting plate 622;

[0069] The driving gear 623 is meshingly connected with the driving tooth set 607;

[0070] An L-shaped positioning plate 625 is provided on the top of the driving motor 624, and a rectangular inner groove 501 is provided on the inner wall of the focusing device outer shell 500 for use with the L-shaped positioning plate 625, and the height of the rectangular inner groove 501 is less than the height of the focusing device outer shell 500, one end of the L-shaped positioning plate 625 exceeds the outer wall of the focusing inner cylinder 603 and is located in the rectangular inner groove 501, and a gap is provided between the end of the L-shaped positioning plate 625 and the curved inner wall of the rectangular inner groove 501.

[0071] When the focus inner cylinder 603 needs to be driven electrically to rotate, the drive motor 624 can be operated, and the output shaft of the drive motor 624 drives the drive gear 623 to rotate together. The drive gear 623 is meshed and connected with the drive tooth group 607, so the second limited external thread 604 can be driven to rotate, and the rotating bottom shaft 621 is rotatably connected with the drive gear 623, which can offset the number of rotations of the drive gear 623, and the bottom shaft 621 and the bottom shaft connecting plate 622 are always connected to the inner wall position of the focus inner cylinder 603, and the top of the drive motor 624 is connected to an L-shaped positioning plate 625, and the end of the L-shaped positioning plate 625 Beyond the driving gear 623 being located in the rectangular inner groove 501, the top of the driving motor 624 can further limit the effect through the L-shaped positioning plate 625 and the rectangular inner groove 501, so that while the driving motor 624 and the driving gear 623 drive the focusing inner cylinder 603 to rotate, they themselves will not be affected by external changes, thereby reducing the occurrence of offset, so that the driving motor 624 and the driving gear 623 can be located on the inner wall of the focusing inner cylinder 603 without affecting the rotation of the focusing inner cylinder 603; and manual rotation of the focusing inner cylinder 603 will not cause damage to the structure of the dual adjustment rotating assembly 620, and the two rotation methods can be used in relay.

[0072] In this embodiment, preferably, Figure 4 , Figure 5 , Figure 6 , Fig.11 , a sealing rubber convex ring 608 is provided on the outer wall of the focusing inner cylinder 603, and the sealing rubber convex ring 608 is located at the top of the second limiting external thread 604;

[0073] A protective adjustment lens 605 is provided in the focusing inner cylinder 603, and the protective adjustment lens 605 is connected to the inner wall of the annular outer convex ring 401 through an extended inner lens 606. When the focusing inner cylinder 603 moves, the protective adjustment lens 605 is in a stationary state through the extended inner lens 606, and the distance between the protective adjustment lens 605 and the focusing adjustment convex lens 601 changes accordingly;

[0074] A gap is provided between the lengthened built-in lens 606 and the linkage support 610;

[0075] The focus adjustment convex lens 601 , the protection adjustment lens 605 , the focus inner cylinder 603 , and the focus device outer shell 500 are all arranged with the same center. An inner cavity 609 of the device is formed in the focus inner cylinder 603 near the focus adjustment convex lens 601 and the protection adjustment lens 605 .

[0076] The sealing rubber convex ring 608 can have a sealing effect, so that when the focusing inner cylinder 603 and the focusing device outer shell 500 are adjusted for displacement, the end of the focusing inner cylinder 603 and the focusing device outer shell 500 can also reduce the gap through the sealing rubber convex ring 608, so that the connection sealing effect of the focusing inner cylinder 603 and the focusing device outer shell 500 is better.

[0077] The protective adjustment lens 605 is located inside the focusing inner cylinder 603 and at the bottom of the focusing adjustment convex lens 601, and the protective adjustment lens 605 itself cannot move and is stationary. Therefore, when the focusing inner cylinder 603 and the focusing convex lens 601 are displaced and adjusted, the distance between the focusing adjustment convex lens 601 and the protective adjustment lens 605 can be changed, thereby realizing zooming and performing a focusing operation.

[0078] In this embodiment, preferably, Figure 5 , Figure 6 , Fig.11 , Fig.12 , Fig.13 The air extraction and anti-fog component 630 is arranged at the bottom of the outer ring of the focusing inner cylinder 603, and the air extraction and anti-fog component 630 is a hollow circular ring structure. At least one built-in shell 636 is arranged in the air extraction and anti-fog component 630, and one side of each built-in shell 636 is connected to the second air supply port 638, and the other side of the built-in shell 636 is connected to the anti-backflow air supply channel 631.

[0079] The functionality of the focusing device can be further improved by using the air extraction and anti-fog component 630. The air extraction and anti-fog component 630 is a hollow ring structure. At least one built-in shell 636 is provided in the air extraction and anti-fog component 630, and one end of the built-in shell 636 is connected to the inner cavity 609 of the device through the second air supply port 638. When performing underwater operations, the air suction fan 637 can be operated. The air suction fan 637 continuously sucks in the air in the inner cavity 609 of the device and outputs it through the anti-backflow air supply channel 631. In this process, the focusing device can be cooled, the temperature in the inner cavity 609 of the device can be reduced, and the fog in the inner cavity 609 of the device can be discharged.

[0080] In this embodiment, preferably, Figure 5 , Figure 6 , Fig.11 , Fig.12 , Fig.13 , an air suction fan 637 is provided in the built-in shell 636;

[0081] A recessed arc-shaped ring seat 639 is provided at a position near the air intake fan 637 in the anti-backflow air supply duct 631, and an anti-backflow gasket 632 parallel to the recessed arc-shaped ring seat 639 is provided in the anti-backflow air supply duct 631. A sealing arc gasket 635 is provided between the anti-backflow gasket 632 and the recessed arc-shaped ring seat 639, and the sealing arc gasket 635 is used in conjunction with the recessed arc-shaped ring seat 639. A sealing spring 634 is provided on the outer ring sleeve of the sealing arc gasket 635, wherein a first air supply port 633 is formed near the middle of the sealing arc gasket 635 of the anti-backflow gasket 632.

[0082] The concave arc ring seat 639, the sealing arc gasket 635, the sealing spring 634, and the anti-backflow gasket 632 in the anti-backflow gas supply channel 631 are anti-backflow settings, so that when the gas is discharged from the focusing device, the external water source will not enter the device from the exhaust port, and the mist in the cavity 609 of the device can be sucked in by the suction fan 637, and enter the anti-backflow gas supply channel 631 through the concave arc ring seat 639. The force generated by the mist continuously absorbed by the suction fan 637 will be transmitted to the sealing arc gasket 635, so that the sealing spring 634 can be used to prevent the backflow of the gas. After receiving the force, 634 contracts, and the sealing arc gasket 635 is separated from the recessed arc ring seat 639. At this time, the mist can be discharged. Once the mist stops being discharged, the sealing spring 634 loses its force and the plane side wall of the sealing arc gasket 635 is squeezed by the water source, the sealing arc gasket 635 can be quickly pushed to the position of the recessed arc ring seat 639, so that the two fit tightly, thereby achieving a sealing effect, so that the air can flow out normally and the water source will not flow back. It is very convenient to use and has a high degree of automation.

[0083] In this embodiment, preferably, Fig.11 , Fig.12 , Fig.13 The end of the sealing arc gasket 635 is a hemispherical structure, a through hole is formed in the middle of the recessed arc ring seat 639, and the cross-section of the through hole of the recessed arc ring seat 639 is a hemispherical depression. When the sealing arc gasket 635 is connected to the recessed arc ring seat 639, the two fit tightly.

[0084] This allows for better sealing effect between the sealing arc gasket 635 and the recessed arc ring seat 639 .

[0085] In this embodiment, preferably, Fig.11 , Fig.12 , Fig.13 The sealing arc gasket 635 is made of rubber. When the plane side wall of the sealing arc gasket 635 is subjected to force, the force will be transmitted to the curved side wall of the sealing arc gasket 635, so that the sealing arc gasket 635 fits tightly with the recessed arc ring seat 639, thereby closing the middle through hole of the recessed arc ring seat 639.

[0086] The rubber material is easily deformable. When the sealing arc gasket 635 is continuously squeezed by the force, the gap between the sealing arc gasket 635 and the recessed arc ring seat 639 will be greatly reduced, thereby enhancing the sealing performance after the two are connected.

[0087] In this embodiment, preferably, Figure 1 , Figure 2 , Figure 3 , Figure 4 A focus adjustment lens 300 is disposed in the connecting card seat 400, and after the focus protection seat 100, the focus device connecting seat 200, and the connecting card seat 400 are connected, they are all sealed structures.

[0088] Fig.13 This is a schematic diagram of the aperture adjustment displacement of the present invention. It can be clearly seen that after the focus inner cylinder 603 moves, the distance between the focus adjustment convex lens 601 and the protection adjustment lens 605 is changed, thereby achieving a zooming effect, so that the focusing operation can be performed.

[0089] Working principle and use process: When the focus inner cylinder 603 needs to be driven to rotate electrically, the drive motor 624 can be operated, and the output shaft of the drive motor 624 drives the drive gear 623 to rotate together. The drive gear 623 is meshed and connected with the drive tooth group 607, so the second limited external thread 604 can be driven to rotate, and the rotating bottom shaft 621 is rotatably connected with the drive gear 623, which can offset the number of rotations of the drive gear 623, and the bottom shaft 621 and the bottom shaft connecting plate 622 are always connected to the inner wall position of the focus inner cylinder 603, and the drive motor 62 4 is connected with an L-shaped positioning plate 625, and the end of the L-shaped positioning plate 625 exceeds the driving gear 623 and is located in the rectangular inner slide groove 501. The top of the driving motor 624 can further limit the effect through the L-shaped positioning plate 625 and the rectangular inner slide groove 501, so that the driving motor 624 and the driving gear 623 can drive the focus inner cylinder 603 to rotate while the driving motor 624 and the driving gear 623 are not affected by external changes, reducing the occurrence of deviation, so that the driving motor 624 and the driving gear 623 can be located on the inner wall of the focus inner cylinder 603 without affecting the rotation of the focus inner cylinder 603;

[0090] At the same time, the focus inner cylinder 603 and the zoom operation can be manually adjusted according to the usage scenario. Just hold the outer wall of the air extraction and anti-fog assembly 630 and rotate the air extraction and anti-fog assembly 630 so that the air extraction and anti-fog assembly 630 drives the focus inner cylinder 603 to rotate together, so that the focus inner cylinder 603 and the focus device outer shell 500 can rotate, and the focus inner cylinder 603 and the focus adjustment convex lens 601 can be moved;

[0091] Furthermore, manual rotation of the focus inner cylinder 603 will not cause damage to the structure of the dual adjustment rotating assembly 620. The two rotation modes can be used in relay, and both can change the distance between the focus adjustment convex lens 601 and the protection adjustment lens 605, achieving a zooming effect, so that the focus operation can be performed;

[0092] At the same time, when performing underwater operations, the suction fan 637 can be operated, and the suction fan 637 continuously sucks the air in the cavity 609 of the device and outputs it through the anti-backflow air supply channel 631. In this process, the focusing device can be cooled, the temperature in the cavity 609 of the device can be reduced, and the mist in the cavity 609 of the device can be discharged. In addition, the concave arc ring seat 639, the sealing arc gasket 635, the sealing spring 634, and the anti-backflow gasket 632 in the anti-backflow air supply channel 631 are anti-backflow settings, so that when the gas is discharged from the focusing device, the external water source will not enter the device from the exhaust port, and the mist in the cavity 609 of the device can be sucked in by the suction fan 637, and enter into the In the anti-backflow air supply duct 631, the force generated by the mist continuously absorbed by the suction fan 637 will be transmitted to the sealing arc gasket 635, so that the sealing spring 634 will shrink after being subjected to the force, and the sealing arc gasket 635 will be separated from the recessed arc ring seat 639, and the mist can be discharged at this time. Once the mist stops being discharged, the sealing spring 634 loses its force and the plane side wall of the sealing arc gasket 635 is squeezed by the water source, the sealing arc gasket 635 can be quickly pushed to the position of the recessed arc ring seat 639, so that the two fit closely, thereby achieving a sealing effect, so that the air can flow out normally and the water source will not flow back. It is very convenient to use and has a high degree of automation.

[0093] The above is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A fast focusing device for underwater high-speed photography, comprising a focusing protection seat (100), a focusing device connecting seat (200) being provided directly below the focusing protection seat (100), a connecting card seat (400) being provided directly below the focusing device connecting seat (200), and an annular outer convex ring (401) being provided around the bottom of the connecting card seat (400), characterized in that: Also includes: The focusing device outer shell (500) is arranged at the bottom of the annular outer convex ring (401), and the two are sealed and connected; A dual-focus adjustment component (600) is disposed in the outer shell (500) of the focusing device, and the dual-focus adjustment component (600) is rotatably connected to the outer shell (500) of the focusing device; The dual-adjustment focus assembly (600) comprises a focus inner cylinder (603), a dual-adjustment rotation assembly (620), and an air extraction anti-fog assembly (630); the focus inner cylinder (603) is a hollow cylindrical structure; the focus inner cylinder (603) and the focus device outer shell (500) are arranged with the same center; The outer wall of the focusing inner cylinder (603) is provided with a second limiting external thread (604), the inner wall of the focusing device outer shell (500) is provided with a first limiting internal thread (502), and the second limiting external thread (604) is used in conjunction with the first limiting internal thread (502); The focus inner cylinder (603) is internally connected to a focus adjustment convex lens (601) via a plurality of linkage pillars (610), and the focus adjustment convex lens (601) and the focus inner cylinder (603) are arranged at the same center of a circle, and when the focus inner cylinder (603) moves, the focus adjustment convex lens (601) moves together with the focus inner cylinder (603); The dual-adjustment rotating assembly (620) is arranged at the top end of the inner wall of the focusing inner cylinder (603); a recessed inner cavity (602) is provided on the inner wall of the focusing inner cylinder (603) near the dual-adjustment rotating assembly (620); and a driving tooth set (607) is provided on the inner wall of the recessed inner cavity (602); The dual-adjustment rotating assembly (620) comprises a driving motor (624), a driving gear (623) is provided in the direction of the output shaft of the driving motor (624), the bottom of the driving gear (623) is rotatably connected to a rotating bottom shaft (621), an outer side wall of the rotating bottom shaft (621) is provided with a bottom shaft connecting plate (622), and the rotating bottom shaft (621) is connected to the inner wall of the focusing inner cylinder (603) via the bottom shaft connecting plate (622); The driving gear (623) is meshingly connected with the driving tooth set (607); An L-shaped positioning plate (625) is provided on the top of the driving motor (624); a rectangular inner slide groove (501) used in conjunction with the L-shaped positioning plate (625) is provided on the inner wall of the outer shell (500) of the focusing device; the height of the rectangular inner slide groove (501) is less than the height of the outer shell (500) of the focusing device; one end of the L-shaped positioning plate (625) exceeds the outer wall of the focusing inner cylinder (603) and is located in the rectangular inner slide groove (501); and a gap is provided between the end of the L-shaped positioning plate (625) and the curved inner wall of the rectangular inner slide groove (501); A sealing rubber convex ring (608) is provided on the outer wall of the focusing inner cylinder (603), and the sealing rubber convex ring (608) is located at the top of the second limiting external thread (604); The focus inner cylinder (603) is provided with a protective adjustment lens (605), and the protective adjustment lens (605) is connected to the inner wall of the annular outer convex ring (401) via an extended built-in lens (606); when the focus inner cylinder (603) is displaced, the protective adjustment lens (605) is in a stationary state via the extended built-in lens (606), and the distance between the protective adjustment lens (605) and the focus adjustment convex lens (601) changes accordingly; A gap is provided between the elongated built-in lens (606) and the linkage support (610); The focus adjustment convex lens (601), the protective adjustment lens (605), the focus inner cylinder (603), and the focus device outer shell (500) are all arranged at the same center of a circle, and a device inner cavity (609) is formed in the focus inner cylinder (603) at positions close to the focus adjustment convex lens (601) and the protective adjustment lens (605); The air extraction anti-fog component (630) is arranged at the bottom of the outer ring of the focusing inner cylinder (603), and the air extraction anti-fog component (630) is a hollow circular ring structure. At least one built-in shell (636) is arranged in the air extraction anti-fog component (630), one side of each built-in shell (636) is connected to the second gas delivery port (638), and the other side of each built-in shell (636) is connected to the anti-backflow gas delivery channel (631); When it is necessary to electrically drive the focus inner cylinder (603) to rotate, the drive motor (624) can be operated, and the output shaft of the drive motor (624) drives the drive gear (623) to rotate together. The drive gear (623) is meshed and connected with the drive gear set (607), so that the second limited external thread (604) can be driven to rotate, and the rotating bottom shaft (621) is rotatably connected to the drive gear (623), which can offset the number of rotations of the drive gear (623), and the bottom shaft connecting plate (622) is always connected to the inner wall of the focus inner cylinder (603), and the top of the drive motor (624) is connected to the bottom shaft (621). An L-shaped positioning plate (625) is connected, and the end of the L-shaped positioning plate (625) exceeds the driving gear (623) and is located in the rectangular inner slide groove (501). The top of the driving motor (624) can further limit the effect through the L-shaped positioning plate (625) and the rectangular inner slide groove (501), so that when the driving motor (624) and the driving gear (623) drive the focusing inner cylinder (603) to rotate, they themselves will not be changed by the outside world, reducing the occurrence of deviation, so that the driving motor (624) and the driving gear (623) can be located on the inner wall of the focusing inner cylinder (603) without affecting the rotation of the focusing inner cylinder (603); At the same time, the focus inner cylinder (603) and the zoom operation can be manually adjusted according to the usage scenario. It is only necessary to hold the outer wall of the air extraction anti-fog component (630) and rotate the air extraction anti-fog component (630) so that the air extraction anti-fog component (630) drives the focus inner cylinder (603) to rotate together, thereby realizing the rotation of the focus inner cylinder (603) and the focus device outer shell (500), and realizing the movement of the focus inner cylinder (603) and the focus adjustment convex lens (601); Furthermore, manual rotation of the focus inner cylinder (603) will not cause damage to the structure on the double adjustment rotating assembly (620), and the two rotation modes can be used in relay, and both can change the distance between the focus adjustment convex lens (601) and the protection adjustment lens (605), thereby achieving a zooming effect, thereby enabling focusing operations.

2. A fast focusing device for underwater high-speed photography according to claim 1, characterized in that: An air suction fan (637) is provided in the built-in shell (636); A recessed arc-shaped ring seat (639) is provided in the anti-backflow gas supply passage (631) at a position close to the air suction fan (637), and an anti-backflow gasket (632) is provided in the anti-backflow gas supply passage (631) and is parallel to the recessed arc-shaped ring seat (639). A sealing arc gasket (635) is provided between the anti-backflow gasket (632) and the recessed arc-shaped ring seat (639), and the sealing arc gasket (635) and the recessed arc-shaped ring seat (639) are used in conjunction with each other. A sealing spring (634) is provided on the outer ring sleeve of the sealing arc gasket (635), wherein a first gas supply port (633) is formed in the middle of the anti-backflow gasket (632) close to the sealing arc gasket (635).

3. A fast focusing device for underwater high-speed photography according to claim 2, characterized in that: The end of the sealing arc gasket (635) is a hemispherical structure, a through hole is formed in the middle of the recessed arc ring seat (639), and the cross-section of the through hole of the recessed arc ring seat (639) is a hemispherical depression. When the sealing arc gasket (635) and the recessed arc ring seat (639) are connected, the two fit tightly.

4. A fast focusing device for underwater high-speed photography according to claim 3, characterized in that: The sealing arc gasket (635) is made of rubber. When a force is applied to the plane side wall of the sealing arc gasket (635), the force is transmitted to the curved side wall of the sealing arc gasket (635), so that the sealing arc gasket (635) and the recessed arc ring seat (639) fit tightly together, thereby closing the through hole in the middle of the recessed arc ring seat (639).

5. A fast focusing device for underwater high-speed photography according to claim 4, characterized in that: The connection card seat (400) is provided with a focus adjustment lens (300), and after the focus protection seat (100), the focus device connection seat (200), and the connection card seat (400) are connected, they are all sealed structures.

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