Multi-stage antifogging cold cavity device
The invention relates to the field of antifogging cold cavities, in particular to a multistage antifogging cold cavity device.
The camera and other equipment need use anti-fog equipment to carry out anti-fog treatment in the use to prevent to produce fog and reduce the working effect of equipment or lead to equipment to be unable work. Most of the water mist is generated because the equipment enters a high-temperature environment from a low-temperature environment, so that water vapor is liquefied and attached to the lens, and the water mist is generated.
It is known from the product provided in patent document CN203433257U that the product is manufactured by providing a heating element, such as a camera or a light, the second cavity is a vacuum cavity or is filled with low-heat-conductivity gas to block the dissipation of heat emitted by the heating element, therefore, heat is hard to be transferred to the first transparent layer, the temperature on the first transparent layer is changed mainly by the change of the external environment, when the product enters a high-temperature environment from a low-temperature environment, the temperature of the first transparent layer is difficult to rise rapidly through the heating element, water vapor is still liquefied and attached to the lens, thereby generating water mist, and the first transparent layer is completely heated depending on the external temperature, the atomization time is longer, this technical scheme can only guarantee that the lens on the camera can not produce water smoke, and still can produce water smoke on first stratum lucidum.
According to the product that patent document CN208063315U provided, through set up the resistance wire in the department that is close to the protecgulum glass and heat, and what radiator fan blew off passes through dust cover, wind-collecting cover, air duct, camera lens cone, air outlet in proper order, arrives the dust cover again at last, realizes the circulation flow, can not carry out better sparse to the heat that produces on the resistance wire, causes the long-time too high near protecgulum glass department, and long-term use can lead to the life reduction of protecgulum glass.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a multi-stage anti-fog cold chamber device, which has the advantage of quickly removing the water mist of the front cover lens on the cold chamber.
The invention adopts the following technical scheme for realizing the technical purpose:
the utility model provides a multistage antifog cold chamber device, includes the casing, the one end threaded connection of casing has the end cover, the casing inlays on being close to the terminal surface of end cover and is equipped with the protecgulum lens.
The end cover is of a hollow structure, a groove is formed in the end face, close to the shell, of the end cover, an electric slide rail is arranged on the inner side of the groove, micro motors are symmetrically arranged on the electric slide rail, the electric slide rail is fixedly connected with a slide block at one end of each micro motor, a movable plate of a circular arc-shaped structure is sleeved on a transmission shaft at the other end of each micro motor, a heating piece is arranged on one side, close to a front cover lens, of the movable plate, and the side face of the heating piece is in clearance fit with the end face of the front.
Preferably, the side wall of the end cover is provided with a plurality of through holes, and the through holes are communicated with the grooves and correspond to the positions of the heating sheets.
Preferably, the ends, far away from the transmission shaft, of the movable plates are matched with each other, and the matching position of the two movable plates passes through the circle center of the circle where the electric sliding rail is located.
Preferably, a switch is arranged at one end of the movable plate away from the transmission shaft.
Preferably, the heating value of the heating sheet is gradually reduced from one end close to the transmission shaft to the other end of the heating sheet.
Preferably, the diameter of the cavity on the inner side of the end cover is larger than that of the front cover lens.
The invention has the following beneficial effects:
1. this antifog cold chamber device of multistage through being split type structure with end cover and casing design, when the camera uses in the environment that the difference in temperature changes greatly, can directly pass through the screw thread with the end cover and be connected the fixed back with the casing and use, in the environment that the temperature is stable, directly take off the end cover can, the defogging device of protecgulum lens does not constitute wholly with the camera, has reduced the complexity of camera lens subassembly.
2. This antifog cold chamber device of multistage, the piece that generates heat on driving fly leaf and the fly leaf through the inside electronic slide rail of end cover rotates, the piece that generates heat sweeps the protecgulum lens fast, thereby detach water smoke, and generate heat piece and protecgulum lens indirect contact not, high temperature on the piece that generates heat is not directly transmitted to on the protecgulum lens, but the water smoke on the prior protecgulum lens of being preferred is absorbed, compare in traditional preceding heating protecgulum lens and detach water smoke, the defogging efficiency of this scheme is higher, heat energy consumption still less, be provided with a plurality of through-hole simultaneously on the lateral wall of end cover, a heat dissipation for the piece that generates heat to accomplishing the defogging operation, improve the outside cold and hot gaseous exchange inside the recess of end.
3. This antifog cold chamber device of multistage, shift out recess or income recess through micro motor drive fly leaf and the piece that generates heat, realize hiding of fly leaf or the piece that generates heat for when the end cover is installed on the casing, can not influence the whole outward appearance of casing, also can protect the fly leaf simultaneously, generate heat the piece etc. and receive destruction.
FIG. 1 is a side view of the movable panel of the present invention when fully extended;
FIG. 2 is a side view of the movable panel of the present invention not fully extended;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 1;
fig. 4 is a cross-sectional view at B-B in fig. 3.
In the figure: 1. a housing; 2. an end cap; 3. a front cover lens; 4. a groove; 5. an electric slide rail; 6. a micro motor; 7. a slider; 8. a drive shaft; 9. a movable plate; 10. a heat generating sheet; 11. a through hole; 12. and (4) switching.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the multistage anti-fog cold chamber device provided according to the embodiment of the present invention includes a housing 1, an end cap 2 is connected to one end of the housing 1 through a screw thread, and a front cover lens 3 is embedded on an end surface of the housing 1 close to the end cap 2.
The end cover 2 is of a hollow structure, a groove 4 is formed in the end face, close to the shell 1, of the end cover 2, an electric sliding rail 5 is arranged on the inner side of the groove 4, micro motors 6 are symmetrically arranged on the electric sliding rail 5, the electric sliding rail 5 is fixedly connected with sliding blocks 7 at one ends of the micro motors 6, a movable plate 9 of a circular arc-shaped structure is sleeved on a transmission shaft 8 at the other end of each micro motor 6, a heating piece 10 is arranged on one side, close to the front cover lens 3, of the movable plate 9, and the side face of the heating piece 10 is in clearance fit with the end face of the front cover lens.
Wherein, be provided with a plurality of through-hole 11 on the lateral wall of end cover 2, through-hole 11 and recess 4 intercommunication, and with the position that generates heat piece 10 is located corresponds, and generate heat piece 10 and after the completion is to the defogging of protecgulum lens 3, withdraw in recess 4, because generate heat piece 10 still is in higher temperature, in order to accelerate the heat dissipation that generates heat piece 10, realize the exchange of the cold and hot gas of end cover 2 outside and recess 4 inside through-hole 11.
The ends of the movable plates 9 far away from the transmission shaft 8 are matched with each other, the matching positions of the two movable plates 9 pass through the center of the circle where the electric slide rail 5 is located, and the length and the shape of the movable plates 9 are consistent, so that the matching positions of the two movable plates 9 are located at the center of the circle where the electric slide rail 5 is located, and the movable plates 9 perform defogging around the center of the front cover lens 3 during circular motion.
Wherein, the one end department that transmission shaft 8 was kept away from to movable plate 9 is provided with switch 12, in order to make the defogging go on in order high-efficiently, must cooperate after movable plate 9 expandes, extrudees switch 12 through the junction to make heating sheet 10 circular telegram carry out defogging work, accomplish the defogging after, withdraw movable plate 9 and make switch 12 separate and accomplish auto-power-off promptly.
The heating value of the heating sheet 10 is gradually reduced from one end close to the transmission shaft 8 to the other end of the heating sheet 10, and the corresponding heating value is set according to the area of a sector area formed by each area on the heating sheet 10 in unit time, so that the water mist in the area can be removed, the heating value of the position where the area of the formed sector area is large, and otherwise, the heating value is small.
The diameter of the cavity channel on the inner side of the end cover 2 is larger than that of the front cover lens 3, so that the view finding and the imaging of the front cover lens 3 are not influenced by the installation of the end cover 2.
The working principle is as follows: when the camera is used in an environment with large temperature difference change, the end cover 2 is fixedly connected with the shell 1 through threads, the electric slide rail 5, the micro motor 6 and the heating sheet 10 are connected with a control system of the camera, when a temperature sensing device on the camera senses that the external temperature suddenly rises, the control system starts the micro motor 6 to work, the movable plate 9 positioned at the inner side of the groove 4 is gradually moved out of the groove 4 under the driving of the transmission shaft 8 until the end parts of the two movable plates 9 are attached, the switch 12 positioned at the end part is opened under the gradual squeezing pressure of the movable plate 9 at the moment, the heating sheet 10 is electrified, after the system receives an electrifying signal of the heating sheet 10, the electric slide rail 5 is ordered to work, the slide block 7 slides along the electric slide rail 5 and drives the micro motor 6, the movable plate 9 and the heating sheet 10 to do circular motion, the heating sheet 10 quickly sweeps along with, the heating of the front cover lens 3 is completed, when the rotation paths of the two movable plates 9 form a closed circle, the micro motor 6 rotates reversely to drive the movable plates 9 to gradually retract into the grooves 4, and when the movable plates 9 are separated, the switch 12 resets, the heating sheet 10 is powered off until the movable plates 9 completely retract into the grooves 4, and the demisting of the front cover lens 3 is completed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.