Camera protection cover and manufacturing method thereof

Abstract

The invention relates to the technical field of camera protection covers, in particular to a camera protection cover and a manufacturing method thereof.The camera protection cover comprises a protection cover body, a base and a protection shell, the base is annular, the protection cover body is fixed to the bottom of the base, the top of the base is fixedly connected with the protection shell, and a sealing ring is installed between the base and the protection shell; the camera protection cover designed by the invention can effectively prevent moisture from permeating, ensure that the interior of a camera is dry, and prolong the service life of equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of camera protection covers, and in particular relates to a camera protection cover and a manufacturing method thereof. Background Art

[0002] With the continuous development of industrial production and construction, the application of video surveillance systems in various industries is becoming more and more common. In some special environments, such as outdoors, industrial plants or in severe weather conditions, cameras need to withstand extreme climatic conditions and environmental influences. Especially in humid environments, traditional camera protective covers are often difficult to effectively waterproof in heavy rain, causing the camera to be damaged by moisture and affecting work efficiency.

[0003] The camera protective covers currently available on the market have the following problems:

[0004] 1. Insufficient waterproofness: Traditional camera covers are often difficult to effectively resist water in heavy rain, causing the inside of the camera to become damp and damaged.

[0005] 2. Poor explosion-proof performance: In explosive environments, the explosion-proof performance of traditional protective covers is limited, posing safety risks.

[0006] 3. Poor high temperature resistance: In high temperature environment, the camera protective cover is easy to deform or melt and cannot effectively protect the camera.

[0007] 4. The explosion-proof performance is not strong: In explosive environments, the explosion-proof performance of traditional protective covers is limited, posing a safety hazard.

[0008] In view of the above problems, a new camera protection cover is needed, which can ensure the normal operation of the camera in a humid environment, protect the equipment from damage, and improve the reliability and stability of the monitoring system. Summary of the invention

[0009] In order to solve the problem that existing camera protection covers are often difficult to effectively waterproof in heavy rain weather, causing the inside of the camera to become damp and damaged, thereby affecting work efficiency, the present invention provides a camera protection cover that can ensure the normal operation of the camera in a humid environment, protect the equipment from damage, and improve the reliability and stability of the monitoring system.

[0010] The technical solution of the present invention is as follows:

[0011] A camera protective cover comprises a protective cover, a base and a protective shell, wherein the base is annular, the protective cover is fixed to the bottom of the base, the top of the base is fixedly connected to the protective shell, and a sealing ring is installed between the base and the protective shell.

[0012] Preferably, the base comprises an inner ring, a middle ring and an outer ring, an annular mounting groove is provided between the middle ring and the outer ring, and a convex rib is provided in the mounting groove.

[0013] Preferably, a mounting groove for mounting a sealing ring is provided at the top of the middle ring, and the sealing ring is installed in the mounting groove.

[0014] Preferably, an annular mounting plane is provided between the inner ring and the middle ring, a positioning pin is provided in the mounting plane, and a positioning tube cooperating with the positioning pin is provided at the bottom of the protective shell.

[0015] Preferably, the protective cover is hemispherical, hollow inside and has an opening, and an annular flange is provided at the open end of the protective cover, and the flange is welded to the inner side of the inner ring.

[0016] Preferably, a connecting piece is fixed to the bottom of the protective shell, the connecting piece is annular, and has a plurality of connecting parts. The connecting parts include a positioning tube, a pair of grooves for placing substrate circuits and a fixing block, at least one connecting part has a first limit block on the side, and at least one connecting part has a second limit block on the bottom, and the positioning tube and the positioning pin cooperate for positioning.

[0017] Preferably, the protective shell is made of aluminum alloy, and the thickness of the protective shell is 2.5-3 mm.

[0018] Preferably, the protective shell and the base are fixedly connected by screws.

[0019] Preferably, the surface of the protective cover has an optical hardening coating.

[0020] Preferably, the protective cover has a thickness of 2-4 mm.

[0021] A method for manufacturing a camera protective cover, the method comprising the following steps:

[0022] Step 1: The polycarbonate plastic rice is dried at a temperature of 110-120°C, poured into the barrel after drying, and the injection molding machine is started to complete the injection molding;

[0023] Step 2: Apply a layer of optical hardening coating to the protective cover. The operator uses a pointed nozzle to suck out the excess liquid in the protective cover and put it into a pre-oven for pre-baking. After taking it out of the pre-oven, put it into the oven for baking to complete the hardening;

[0024] Step 3: Place the protective cover into the nylon tooling, turn on the vacuum device to fix the position of the protective cover, start the lathe machine, and remove the hardened liquid in the contact area between the bottom of the flange edge of the protective cover and the welding line;

[0025] Step 4: The base and the protective cover are matched, and the base and the protective cover are melted and bonded together by ultrasonic vibration friction through ultrasonic welding to complete the welding;

[0026] Step 5: Apply glue to the inside of the sealing ring, match the sealing ring with the sealing groove of the base, and let it stand for a while to complete the bonding of the sealing ring;

[0027] Step 6: Assemble the base and the protective shell and secure them with screws.

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

[0029] (1) The present invention adopts the method of welding the protective cover and the base, and uses an adhesive sealing ring at the base connection to effectively prevent moisture from penetrating, ensure the internal dryness of the camera, extend the life of the equipment, and make it meet the IP67 test requirements.

[0030] (2) In the embodiment of the present invention, the protective cover is made of high temperature resistant and impact resistant polycarbonate (PC) material to ensure excellent protection performance in high temperature environment, so that its transmittance in the 400-700nm band is above 90%, the image quality meets the ISO 12233 test standard, and the top and four sides meet the I K10 test requirements.

[0031] (3) In an embodiment of the present invention, an optical hardening coating is coated on the surface of the protective shell, so that the film layer is smooth and has excellent anti-pollution ability, thereby ensuring light transmittance while improving wear resistance (surface hardness reaches above HB), maintaining a clear monitoring screen, and making the friction resistance meet HB or above. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the protective cover of the present invention;

[0033] Figure 2 It is a schematic diagram of the overall structure of the base of the present invention;

[0034] Figure 3 It is a schematic diagram of the overall structure of the present invention after the base and the protective cover are fixed;

[0035] Figure 4 It is a schematic diagram of the overall structure of the camera protection cover of the present invention;

[0036] Figure 5 An exploded view of the protective shell of the present invention;

[0037] Figure 6 This is a schematic diagram of the overall structure of the bottom connector of the protective shell of the present invention;

[0038] Figure 7 An exploded view of the base of the present invention;

[0039] Figure 8 for Figure 7 An enlarged schematic diagram of the reference numeral A;

[0040] In the figure: 1-protective cover, 11-flange, 2-base, 21-outer ring, 22-middle ring, 23-inner ring, 24-sealing ring, 25-mounting groove, 26-locating pin, 27-screw, 28-convex rib, 210-mounting plane, 3-protective shell, 31-screw hole, 32-connecting piece, 321-positioning tube, 322-first groove, 323-second groove, 324-fixing block, 325-first limit block, 326-second limit block, 4-mounting groove. DETAILED DESCRIPTION

[0041] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] See also Figure 1-4 Embodiment 1: A camera protective cover comprises a protective cover 1, a base 2 and a protective shell 3, wherein the base 2 is annular, the protective cover 1 is fixed to the bottom of the base 2, the top of the base 2 is fixedly connected to the protective shell 3, and a sealing ring 24 is installed between the base 2 and the protective shell 3.

[0043] Embodiment 2: In this embodiment, the base 2 includes an inner ring 23, a middle ring 22 and an outer ring 21, and an annular mounting groove 25 is provided between the middle ring 22 and the outer ring 21. A convex rib 28 is arranged in the mounting groove 25, and a slot hole for avoiding the convex rib is opened at the bottom of the protective shell 3.

[0044] In order to improve the high temperature resistance and impact resistance of the protective cover, in one embodiment of the present invention, the material of the protective cover is carbon polyester, and ultraviolet stabilizers and plasticizers are added during the synthesis of the carbon polyester. The modified carbon polyester has excellent ultraviolet resistance and further impact resistance; the transmittance in the 400-700nm band reaches more than 90%, the image quality meets the ISO 12233 test standard, and the top and four sides meet the I K10 test requirements.

[0045] See also Figure 7-8 In one embodiment of the present invention, a mounting groove 4 for mounting a sealing ring is provided at the top of the middle ring. The sealing ring is installed in the mounting groove, and its shape is consistent with the position of the middle ring groove, and it is miniaturized by 0.1mm and has a thickness of 1-3mm. It is adaptively set according to the size of other components. It is used for sealing between the protective shell and the base, effectively preventing water, dust, etc. from flowing into the camera.

[0046] See also Figure 5-6In one embodiment of the present invention, a connector 32 is fixed at the bottom of the protective shell 3. The connector 32 is annular and has a plurality of connecting parts. The connecting parts include a positioning tube 321, a pair of grooves for placing substrate circuits and a fixing block 324. The pair of grooves for placing substrate circuits includes a first groove 322 and a second groove 323. At least one connecting part has a first limit block 325 on the side to prevent the overall tooling from shifting in the X-axis direction. At most, the bottom of one connecting part has a second limit block 326 for preventing the overall tooling from shifting in the Y-axis direction, which also plays a positioning role and is only protruding on one side to facilitate identification of the direction during assembly.

[0047] See also Figure 2-6 In order to facilitate the installation of the protective shell 3 and the base 2, on the basis of the previous embodiment, an annular installation plane 210 is provided between the inner ring 23 and the middle ring 22, and a positioning pin 26 is provided in the installation plane 210. A positioning tube 321 cooperating with the positioning pin 26 is provided at the bottom of the protective shell 3. Through the cooperation between the positioning tube 321 and the positioning pin 26, the positioning is quick and accurate during installation, thereby improving the installation efficiency.

[0048] See also Figure 2 , Figure 3 and Figure 5 In one embodiment of the present invention, the protective shell is provided with a screw hole 31, and the connection between the base and the protective shell is achieved by fixing with a screw 27 (note that the screw 27 in the figure is not locked at this time, but only indicates the position of the screw at the corresponding position in the figure, and the screw is locked when the protective shell and the base are assembled). The two are detachable, which provides convenience for subsequent replacement of parts or disassembly and maintenance.

[0049] See also Figure 1 and Figure 3 In one embodiment of the present invention, the protective cover 1 is hemispherical, hollow inside and has an opening, and an annular flange 11 is provided at the open end of the protective cover 1, and the flange 11 is welded to the inner side of the inner ring 23.

[0050] In one embodiment of the present invention, the protective shell 3 is made of aluminum alloy or stainless steel, and the thickness of the protective shell is 2.5-3 mm.

[0051] In one embodiment of the present invention, the surface of the protective cover 1 has an optical hardening coating, and the composition of the optical hardening coating includes modified polysiloxane, the main substance of which is polysiloxane. Polar substances and anti-ultraviolet agents are added during synthesis. Compared with conventional polysiloxane, the outdoor use time is greatly extended. Generally, the service life of the polysiloxane hardening layer is 3 years, which can reach 5 years after modification. The film layer is smooth and has excellent anti-pollution ability, which ensures light transmittance while improving wear resistance.

[0052] In one embodiment of the present invention, the thickness of the protective cover is 2-4 mm.

[0053] In one embodiment of the present invention, the thickness of the sealing ring is 1-3 mm.

[0054] In one embodiment of the present invention, a method for manufacturing the above-mentioned camera protective cover comprises the following steps:

[0055] Step 1: Injection mold the base and protective cover to give them physical properties such as shape, strength, density, and optical indicators; the top and sides of the protective cover meet the I K10 test requirements, the transmittance in the 400-700nm band is above 90%, and the image quality meets the ISO 12233 test standard;

[0056] Pour the polycarbonate plastic rice into the barrel after drying at 110-120℃ for 4 hours, the amount of polycarbonate plastic rice is 30-35kg, start the injection molding machine, and complete the injection molding;

[0057] The main parameters of the injection molding machine: barrel temperature setting: 270-300℃, hot runner temperature 280-290℃, fixed mold temperature 90-100℃, movable mold temperature 90-100℃, injection 10-20s, cooling 50-60s, pressure 240-250Mpa;

[0058] Step 2: Use spraying equipment or manual lifting to apply an optical hardening coating to the protective cover to make it have good friction resistance. The speed is 10-13mm / s, and it is left to level for 8-12s. The operator uses a pointed nozzle to suck out the excess liquid in the protective cover and put it into a pre-oven for pre-baking at 70-80℃ / 10min. After taking it out of the pre-oven, put it in an oven and bake it at 110-120℃ / 60min to complete the hardening.

[0059] The above-mentioned spraying equipment may be a spray gun, but is not limited thereto.

[0060] Step 3: Place the protective cover into the nylon tooling, turn on the vacuum device to fix the position of the protective cover, start the lathe, and remove the hardened liquid in the contact area between the bottom of the protective cover flange and the welding line to avoid affecting the melting effect of welding;

[0061] The vacuum suction device is a conventional device, and the working principle thereof will not be described here.

[0062] Step 4: In order to melt and bond the protective cover to the base to meet the waterproof and explosion-proof requirements, the top and sides of the protective cover meet the I K10 test requirements, the static pressure test is greater than 2000N without separation, and the IP67 test standard is met; the base and the protective cover are matched, and the base and the protective cover are melted and bonded together by ultrasonic vibration friction through ultrasonic welding to complete the welding;

[0063] Step 5: Apply glue to the inside of the sealing ring, fit the sealing ring with the sealing groove of the base within 60 seconds, let it stand for 30-60 minutes to complete the bonding of the sealing ring; by bonding the middle ring of the base with the sealing ring, the base and the protective shell will have excellent sealing after being matched.

[0064] Step 6: Assemble the base and the protective shell, tighten them with screws, and assemble the various components to achieve the integrity of the camera.

[0065] In one embodiment of the present invention, in step 2, after the protective cover is coated with PC material, the contact angle is greater than 90°, and the surface roughness is: Ra≤10nm.

[0066] In the embodiment of the present invention, in step 4, a domestic welding machine or a Branson welding machine is used. The lower die of the tooling is open and closed left and right. The contour of the upper die of the tooling is consistent with the flange edge contour of the protective cover. The tooling is made of aluminum alloy with an accuracy of 0.05mm. The main parameters of the welding machine are: energy 700-900J, amplitude 80-90%, and holding time 0.8-1.2s.

[0067] In one embodiment of the present invention, in step 5, an automatic glue dispensing machine or a manual squeeze glue gun is used for glue dispensing, and acrylic resin glue (different materials of glue are optional) is used, the glue thickness is about 0.6-0.8mm, and the glue has no bubbles.

[0068] In an embodiment of the present invention, in step 6, the screws are tightened using hexagon socket screws or an automatic screw locking machine.

[0069] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A camera protective cover, characterized in that: It includes a protective cover, a base and a protective shell, the base is annular, the protective cover is fixed to the bottom of the base, the top of the base is fixedly connected to the protective shell, and a sealing ring is installed between the base and the protective shell; The base comprises an inner ring, a middle ring and an outer ring. An annular mounting groove is provided between the middle ring and the outer ring. A convex rib is provided in the mounting groove.

2. A camera protective cover according to claim 1, characterized in that: A mounting groove for mounting a sealing ring is provided on the top of the middle ring, and the sealing ring is mounted in the mounting groove.

3. A camera protective cover according to claim 1, characterized in that: An annular mounting plane is provided between the inner ring and the middle ring, and a positioning pin is arranged in the mounting plane.

4. A camera protective cover according to claim 3, characterized in that: A connecting piece is fixed at the bottom of the protective shell. The connecting piece is annular and has several connecting parts. The connecting parts include a positioning tube, a pair of grooves for placing substrate circuits and a fixing block. At least one connecting part has a first limit block on the side, and at least one connecting part has a second limit block on the bottom. The positioning tube and the positioning pin cooperate for positioning.

5. A camera protective cover according to claim 1, characterized in that: The protective cover is hemispherical, hollow inside and has an opening. The open end of the protective cover is provided with an annular flange edge, and the flange edge is welded to the inner side of the inner ring.

6. A camera protective cover according to claim 1, characterized in that: The material of the protective shell is aluminum alloy, and the thickness of the protective shell is 2.5-3 mm.

7. A camera protective cover according to claim 1, characterized in that: The protective shell and the base are fixedly connected by screws.

8. The camera protective cover according to claim 1, characterized in that: The surface of the protective cover is provided with an optical hardening coating.

9. The camera protective cover according to claim 1, characterized in that: The thickness of the protective cover is 2-4 mm.

10. A method for manufacturing a camera protective cover as claimed in any one of claims 1 to 9, characterized in that: The production method comprises the following steps: Step 1: The polycarbonate plastic rice is dried at a temperature of 110-120°C, poured into the barrel after drying, and the injection molding machine is started to complete the injection molding; Step 2: Apply a layer of optical hardening coating to the protective cover. The operator uses a pointed nozzle to suck out the excess liquid in the protective cover and put it into a pre-oven for pre-baking. After taking it out of the pre-oven, put it into the oven for baking to complete the hardening; Step 3: Place the protective cover into the nylon tooling, turn on the vacuum device to fix the position of the protective cover, start the lathe machine, and remove the hardened liquid in the contact area between the bottom of the flange edge of the protective cover and the welding line; Step 4: The base and the protective cover are matched, and the base and the protective cover are melted and bonded together by ultrasonic vibration friction through ultrasonic welding to complete the welding; Step 5: Apply glue to the inside of the sealing ring, match the sealing ring with the sealing groove of the base, and let it stand for a while to complete the bonding of the sealing ring; Step 6: Assemble the base and the protective shell and secure them with screws.

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