Lens airtightness tester

Abstract

The invention relates to the technical field of lenses, and discloses a lens airtightness tester, which comprises an airtightness tester main body and a test base, the top end of the test base close to four corners is provided with pillars, the top ends of the pillars are provided with a top plate, the top end of the top plate is provided with an air cylinder, and a piston rod of the air cylinder movably penetrates through the top plate. A connecting column is installed at the bottom end of a piston rod of the air cylinder, a testing cover is installed at the bottom end of the connecting column, and an air pipe is arranged between the testing cover and the air tightness tester body in a communicating mode. The feeding and discharging efficiency is greatly improved, the sealing performance between the testing cover and the testing base can be greatly improved by arranging the sealing mechanism, the stability of the internal air pressure of the testing cover during use is guaranteed, and therefore the accuracy of the air tightness testing of the lens is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of lenses, in particular, relates to a lens air tightness tester. BACKGROUND

[0002] As a key optical element, lenses are widely used in various optical instruments, photographic and video equipment, laser systems and medical equipment and many other fields, and the performance of lenses directly affects the optical quality and running stability of related equipment. Air tightness is one of the important indicators to measure the quality of lenses. Good air tightness can effectively prevent external moisture, dust and other impurities from entering the lens, avoid the decline of lens optical performance, mold spots, coating falling and other problems caused by internal environment changes, and thus ensure that the lens can play its optical function stably in various complex environments for a long time.

[0003] The existing lens air tightness test equipment usually needs manual operation to take out the lens from the test seat during unloading. Since the internal space of the test seat is small, and the lens may be tightly attached to the test seat due to the extrusion of the test cover during the test process, it is not convenient to manually take out the lens. Not only a lot of time and labor are consumed, but also the lens may be damaged or scratched due to improper operation, affecting the appearance quality and optical performance of the lens. Moreover, the connection between the test cover and the test base in the existing test equipment is relatively simple, and ordinary plane contact or simple buckle connection is usually adopted. This connection mode cannot guarantee the complete attachment between the test cover and the test base, and small gaps may be easily generated at the connection. When the gas is filled into the test cover for air tightness detection, the gas may easily leak out of these gaps, resulting in unstable internal pressure of the test cover. This not only affects the accuracy of the judgment of the lens air tightness, but also may misjudge some lenses with unqualified air tightness as qualified due to gas leakage, causing losses to users after entering the market. Therefore, we propose a lens air tightness tester. SUMMARY

[0004] To solve the above technical problems, the basic idea of the technical scheme adopted by the present application is as follows: A lens air tightness tester, comprising an air tightness tester main body and a test base, a support is installed near the four corners at the top end of the test base, a top plate is installed at the top end of the support, a gas cylinder is installed at the top end of the top plate, a piston rod of the gas cylinder is movably penetrated through the top plate, a connecting column is installed at the bottom end of the piston rod of the gas cylinder, a test cover is installed at the bottom end of the connecting column, a gas pipe is arranged in communication between the test cover and the air tightness tester main body, a placing seat is installed at the top end of the test base, an ejection mechanism for pushing out the lens is arranged in the placing seat, a sealing ring groove is formed at the top end of the test base, the test cover is inserted into the sealing ring groove, and a sealing mechanism for improving the sealing performance between the test cover and the sealing ring groove is arranged in the sealing ring groove.

[0005] As a preferred embodiment of the present application, the discharging mechanism comprises a push plate and a connecting frame, a contraction groove is formed in the bottom end of the inner wall of the test base, the push plate is movably embedded in the contraction groove, a top rod is installed at the bottom end of the push plate, a moving groove is formed in the test base, the connecting frame is slidably connected with the inner wall of the moving groove, a groove one is formed in the top end of the inner wall of the moving groove, the bottom end of the connecting frame is installed at the top end of the inner wall of the moving groove, the top rod is movably penetrated through the top end of the inner wall of the groove one and the bottom end of the inner wall of the contraction groove, a spring one is arranged around the outer wall of the top rod, the spring one is installed between the top end of the inner wall of the connecting frame and the top end of the inner wall of the groove, two limiting grooves are formed between the top end of the test base and the inner wall of the moving groove, the connecting frame is movably penetrated through the two limiting grooves, a connecting plate is installed on the outer wall of the test cover, and the test cover can press down the connecting frame through the connecting plate.

[0006] As a preferred embodiment of the present application, a sealing pad is installed at the bottom end of the inner wall of the contraction groove, and the sealing pad is tightly attached to the surface of the bottom end of the push plate. By arranging the sealing pad, the sealing property between the push plate and the contraction groove can be improved.

[0007] As a preferred embodiment of the present application, the sealing mechanism comprises a sealing air cushion and an extrusion plate, the sealing air cushion is installed in the sealing ring groove, a groove two is formed in the bottom end of the inner wall of the sealing ring groove, the extrusion plate is movably embedded in the groove two, a piston cavity is formed in the test base, a rod hole is formed between the bottom end of the inner wall of the groove two and the top end of the inner wall of the piston cavity, a piston plate is slidably connected with the inner wall of the piston cavity, a connecting rod one is connected between the top end of the piston plate and the bottom end of the extrusion plate, the connecting rod one is movably penetrated through the rod hole, a spring two is arranged around the outer wall of the connecting rod one, the spring two is installed between the bottom end of the extrusion plate and the bottom end of the inner wall of the groove two, an air channel is formed between the inner wall of the piston cavity and the sealing air cushion, and the piston cavity can be communicated with the sealing air cushion through the air channel.

[0008] As a preferred embodiment of the present application, the number of the sealing air cushions is two, and the two sealing air cushions are tightly attached to the inner wall and the outer wall of the test cover, respectively.

[0009] As a preferred embodiment of the present application, a groove three is formed between the top end of the test cover and the bottom end of the connecting column, a rod groove is formed in the top end of the inner wall of the groove three, a connecting rod two is inserted in the rod groove, a pressing plate is installed at the bottom end of the connecting rod two, a spring three is arranged around the outer wall of the connecting rod two, and the spring three is installed between the top end of the pressing plate and the top end of the inner wall of the groove. By arranging the pressing plate, the pressing plate can press the lens tightly.

[0010] As a preferred embodiment of the present application, a pressing pad is installed at the bottom end of the pressing plate, and the pressing pad can avoid the hard contact between the pressing plate and the lens, thereby protecting the lens.

[0011] As a preferred embodiment of the present application, the material of the pressing pad is wear-resistant rubber.

[0012] Compared with the prior art, the present application has the following beneficial effects: The present application is provided with a discharging mechanism, which can automatically push the lens out of the placing seat after the lens air tightness test is completed, thereby facilitating personnel to take it, greatly improving the feeding and discharging efficiency, and through the sealing mechanism, the sealing property between the test cover and the test base can be greatly improved, the stability of the internal air pressure of the test cover during use is ensured, and the accuracy of the lens air tightness test is ensured.

[0013] The present application is provided with a pressing plate and a spring, which can press and fix the lens when the test cover covers the placing seat, thereby improving the stability of the lens in the placing seat and further ensuring the accuracy of the lens air tightness detection data, and the structure is simple and practical.

[0014] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0015] In the drawings: Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the front cross-sectional structure of the test cover of the present application; Figure 3 It is a schematic diagram of the Figure 2 enlarged structure of part A; Figure 4 It is a schematic diagram of the Figure 2 enlarged structure of part B; Figure 5 It is a schematic diagram of the Figure 2 enlarged structure of part C; Figure 6 It is a schematic diagram of the piston plate structure of the present application.

[0016] In the drawings: 1, air tightness tester main body; 2, test base; 3, top plate; 4, support column; 5, air cylinder; 6, connecting column; 7, placing seat; 8, test cover; 9, push plate; 10, top rod; 11, groove one; 12, spring one; 13, moving groove; 14, connecting frame; 15, limiting groove; 16, connecting plate; 17, sealing gasket; 18, contraction groove; 19, sealing ring groove; 20, sealing air cushion; 21, groove two; 22, spring two; 23, connecting rod one; 24, piston cavity; 25, rod hole; 26, piston plate; 27, air duct; 28, extrusion plate; 29, pressing plate; 30, pressing pad; 31, connecting rod two; 32, groove three; 33, spring three; 34, rod groove. DETAILED DESCRIPTION

[0017] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application.

[0018] As shown in Figures 1 to 6 The present application provides a technical solution: a lens airtight tester, comprising an airtight tester main body 1 and a test base 2, a support 4 is installed near the four corners at the top end of the test base 2, a top plate 3 is installed at the top end of the support 4, an air cylinder 5 is installed at the top end of the top plate 3, the piston rod of the air cylinder 5 is movably penetrated through the top plate 3, a connecting column 6 is installed at the bottom end of the piston rod of the air cylinder 5, a test cover 8 is installed at the bottom end of the connecting column 6, an air pipe is arranged in communication between the test cover 8 and the airtight tester main body 1, a placing seat 7 is installed at the top end of the test base 2, a discharging mechanism for pushing out the lens is arranged in the placing seat 7, a sealing ring groove 19 is opened at the top end of the test base 2, the test cover 8 is inserted into the sealing ring groove 19, and a sealing mechanism for improving the sealing performance between the test cover 8 and the sealing ring groove 19 is arranged in the sealing ring groove 19.

[0019] Further, the discharging mechanism comprises a push plate 9 and a connecting frame 14, a contraction groove 18 is opened at the bottom end of the inner wall of the placing seat 7, the push plate 9 is movably embedded in the contraction groove 18, a top rod 10 is installed at the bottom end of the push plate 9, a moving groove 13 is opened in the test base 2, the connecting frame 14 is slidably connected with the inner wall of the moving groove 13, a groove one 11 is opened at the top end of the inner wall of the moving groove 13, the bottom end of the outer wall of the top rod 10 is installed at the top end of the inner wall of the connecting frame 14, the top rod 10 is movably penetrated through the top end of the inner wall of the groove one 11 and the bottom end of the inner wall of the contraction groove 18, a spring one 12 is arranged around the outer wall of the top rod 10, the spring one 12 is installed between the bottom end of the inner wall of the connecting frame 14 and the top end of the inner wall of the groove, two limiting grooves 15 are opened in communication between the top end of the test base 2 and the inner wall of the moving groove 13, the connecting frame 14 is movably penetrated through the two limiting grooves 15 respectively, and a connecting plate 16 is installed on the outer wall of the test cover 8. Among them, through the setting of the connecting plate 16, the test cover 8 can press down the connecting frame through the connecting plate 16.

[0020] Further, a sealing gasket 17 is installed at the bottom end of the inner wall of the contraction groove 18, and the sealing gasket 17 is tightly attached to the bottom end surface of the push plate 9. Among them, through the setting of the sealing gasket 17, the sealing performance between the push plate 9 and the contraction groove 18 can be increased.

[0021] Further, the sealing mechanism comprises the sealing air cushion 20 and the extrusion plate 28, the sealing air cushion 20 is installed in the inner wall of the sealing ring groove 19, the bottom end of the inner wall of the sealing ring groove 19 is provided with a groove two 21, the extrusion plate 28 is movably embedded in the groove two 21, the inside of the test base 2 is provided with a piston cavity 24, the bottom end of the inner wall of the groove two 21 and the top end of the inner wall of the piston cavity 24 are communicated and provided with a rod hole 25, the piston cavity 24 is slidably connected with a piston plate 26, the top end of the piston plate 26 and the bottom end of the extrusion plate 28 are connected with a connecting rod one 23, the connecting rod one 23 movably penetrates the rod hole 25, the outer wall of the connecting rod one 23 is surrounded by a spring two 22, the spring two 22 is installed between the bottom end of the extrusion plate 28 and the bottom end of the inner wall of the groove two 21, the inner wall of the piston cavity 24 and the sealing air cushion 20 are communicated and provided with an air channel 27; Wherein, by setting the air channel 27, the piston cavity 24 can be communicated between the air channel 27 and the sealing air cushion 20.

[0022] Further, the number of the sealing air cushion 20 is two, and the two sealing air cushions 20 are tightly attached to the inner wall and the outer wall of the test cover 8.

[0023] Further, the top end of the test cover 8 and the bottom end of the connecting column 6 are communicated and provided with a groove three 32, the top end of the inner wall of the groove three 32 is provided with a rod groove 34, the rod groove 34 is inserted with a connecting rod two 31, the bottom end of the connecting rod two 31 is installed with a pressing plate 29, the outer wall of the connecting rod two 31 is surrounded by a spring three 33, and the spring three 33 is installed between the top end of the pressing plate 29 and the top end of the inner wall of the groove; Wherein, by setting the pressing plate 29, the pressing plate 29 can press the lens.

[0024] Further, the bottom end of the pressing plate 29 is installed with a pressing pad 30; Wherein, by setting the pressing pad 30, the hard contact between the pressing plate 29 and the lens can be avoided, and the lens is protected.

[0025] Further, the material of the pressing pad 30 is wear-resistant rubber.

[0026] The implementation principle of the lens air tightness tester is as follows: in use, the lens to be tested is placed on the push plate 9, and then the air cylinder 5 is started to drive the test cover 8 to move downward through the connecting column 6, the connecting plate 16 is driven by the test cover 8 to move downward, and finally contacts the connecting frame 14 during the downward movement of the connecting plate 16, so that the connecting plate 16 drives the connecting frame 14 to move downward, the connecting frame 14 is stretched, the top rod 10 is driven by the connecting frame 14 to move downward, the push plate 9 is driven by the top rod 10 to move downward, the push plate 9 drives the lens to shrink into the placing seat 7, at this time the test cover 8 covers the placing seat 7, the test cover 8 is inserted into the sealing ring groove 19, the test cover 8 extrudes the extrusion plate 28, the extrusion plate 28 drives the connecting rod one 23 to move downward, the connecting rod one 23 drives the piston plate 26 to move downward, the piston plate 26 extrudes the air in the piston cavity 24 downward, the extruded air is transported to the sealing air cushion 20 through the air channel 27, the sealing air cushion 20 is inflated and wrapped on the surface of the test cover 8, thereby greatly improving the sealing between the test cover 8 and the test base 2, when the test cover 8 covers the placing seat 7, the test cover 8 drives the pressing plate 29 to move downward through the spring three 33, the pressing plate 29 contacts the lens, the pressing plate 29 compresses the spring three 33, and the pressing plate 29 is pressed in the placing seat 7 under the reaction force of the spring three 33, then the air tightness tester main body 1 is started, the air tightness tester main body 1 tests the air tightness of the lens in the test cover 8, the air tightness of the lens is judged by observing the change of the air pressure in the test cover 8, when the air tightness test of the lens is completed, the air cylinder 5 is started to drive the test cover 8 to move upward through the connecting column 6, the test cover 8 drives the connecting plate 16 to move upward, the connecting plate 16 no longer extrudes the connecting frame 14, at this time the connecting frame 14 drives the top rod 10 to move upward under the restoring force of the spring one 12, the top rod 10 drives the push plate 9 to move upward, the push plate 9 drives the lens to move out of the placing seat 7, thereby facilitating personnel to take, through the above structure, the discharge mechanism is arranged, the push plate 9 can automatically push the lens out of the placing seat 7 after the lens air tightness test is completed, thereby facilitating personnel to take, the feeding and discharging efficiency is greatly improved, the sealing mechanism is arranged, the sealing between the test cover 8 and the test base 2 is greatly improved, the stability of the internal air pressure of the test cover 8 during use is ensured, thereby ensuring the accuracy of the lens air tightness test, the pressing plate 29 and the spring three 33 are arranged, the pressing plate 29 can press and fix the lens when the test cover 8 covers the placing seat 7, thereby improving the stability of the lens in the placing seat 7, further ensuring the accuracy of the lens air tightness test data, the structure is simple and practical.

Claims

1. A lens airtight tester, comprising an airtight tester main body (1) and a test base (2), a support column (4) is installed on the top of the test base (2) near the four corners, a top plate (3) is installed on the top of the support column (4), an air cylinder (5) is installed on the top of the top plate (3), the piston rod of the air cylinder (5) is movably penetrated through the top plate (3), a connecting column (6) is installed on the bottom end of the piston rod of the air cylinder (5), a test cover (8) is installed on the bottom end of the connecting column (6), an air pipe is arranged in communication between the test cover (8) and the airtight tester main body (1), and a placing seat (7) is installed on the top of the test base (2). The placing seat (7) is provided with a discharging mechanism for pushing out the lens, the test base (2) is provided with a sealing ring groove (19) at the top end, the test cover (8) is inserted into the sealing ring groove (19), and the sealing ring groove (19) is provided with a sealing mechanism for improving the sealing performance between the test cover (8) and the sealing ring groove (19).

2. The lens air tight tester of claim 1, wherein, The discharging mechanism comprises a push plate (9) and a connecting frame (14), the inner wall of the placing seat (7) is provided with a contraction groove (18) at the bottom end, the push plate (9) is movably embedded in the contraction groove (18), the bottom end of the push plate (9) is provided with a top rod (10), the inside of the test base (2) is provided with a moving groove (13), the connecting frame (14) is slidably connected with the inner wall of the moving groove (13), the inner wall of the moving groove (13) is provided with a groove one (11) at the top end, the bottom end of the top rod (10) is mounted on the inner wall top end of the connecting frame (14), the top rod (10) movably penetrates through the inner wall top end of the groove one (11) and the inner wall bottom end of the contraction groove (18), the outer wall of the top rod (10) is surrounded by a spring one (12), the spring one (12) is mounted between the inner wall bottom end of the connecting frame (14) and the inner wall top end of the groove, and the top end of the test base (2) and the inner wall of the moving groove (13) are communicated and provided with two limiting grooves (15), the two ends of the connecting frame (14) movably penetrate through the two limiting grooves (15) respectively, and the outer wall of the test cover (8) is provided with a connecting plate (16).

3. The lens air tight tester of claim 2, wherein, The inner wall bottom end of the contraction groove (18) is provided with a sealing gasket (17), and the sealing gasket (17) is tightly attached to the bottom end surface of the push plate (9).

4. The lens air tight tester of claim 1, wherein, The sealing mechanism comprises a sealing air cushion (20) and an extrusion plate (28), the sealing air cushion (20) is mounted on the inner wall of the sealing ring groove (19), the inner wall of the sealing ring groove (19) is provided with a groove two (21) at the bottom end, the extrusion plate (28) is movably embedded in the groove two (21), the inside of the test base (2) is provided with a piston cavity (24), the inner wall bottom end of the groove two (21) and the inner wall top end of the piston cavity (24) are communicated and provided with a rod hole (25), the inner wall of the piston cavity (24) is slidably connected with a piston plate (26), the top end of the piston plate (26) and the bottom end of the extrusion plate (28) are connected with a connecting rod one (23), the connecting rod one (23) movably penetrates through the rod hole (25), the outer wall of the connecting rod one (23) is surrounded by a spring two (22), the spring two (22) is mounted between the bottom end of the extrusion plate (28) and the inner wall bottom end of the groove two (21), and the inner wall of the piston cavity (24) and the sealing air cushion (20) are communicated and provided with an air channel (27).

5. The lens air tight tester of claim 4, wherein, The number of the sealing air cushions (20) is two, and the two sealing air cushions (20) are tightly attached to the inner wall and the outer wall of the test cover (8) respectively.

6. The lens air tight tester of claim 1, wherein, The top end of the test cover (8) is communicated with the bottom end of the connecting column (6) and is provided with a groove three (32), the top end of the inner wall of the groove three (32) is provided with a rod groove (34), the connecting rod two (31) is inserted into the rod groove (34), the bottom end of the connecting rod two (31) is provided with a pressing plate (29), the outer wall of the connecting rod two (31) is surrounded by a spring three (33), and the spring three (33) is installed between the top end of the pressing plate (29) and the top end of the inner wall of the groove.

7. The lens air tight tester of claim 6, wherein, The bottom end of the pressing plate (29) is provided with a pressing pad (30).

8. The lens air tight tester of claim 7, wherein, The material of the pressing pad (30) is wear-resistant rubber.

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