Air tightness detection device

Abstract

The present invention belongs to the technical field of air tightness detection, and discloses an air tightness detection device, which is used to detect the air tightness of a sheet material covered on the inner side of an orifice of a first through hole of a panel, and comprises a carrier, a covering member and an air tightness detector, wherein the carrier carries the panel, the covering member is arranged above the carrier and can be raised and lowered, the covering member is provided with a first groove, and a second groove is recessed on the covering member and / or a third groove is recessed on the carrier, when the covering member is pressed against the carrier, part of the covering member is pressed against the panel, so that a first cavity is formed between the first groove and the panel, and the second groove and / or the third groove are formed as a chamber of the second cavity, the orifices at both ends of the first through hole are respectively connected with the first cavity and the second cavity, an inflation port connected with one of the first cavity and the second cavity is arranged on the carrier or the covering member, and the air tightness detector detects the air pressure of the other of the first cavity and the second cavity, thereby detecting the air tightness of the sheet material.

Description

Technical Field

[0001] The invention relates to the technical field of air tightness detection, and in particular to an air tightness detection device. Background Art

[0002] An earpiece hole is usually provided on the panel of the screen of an electronic product. The inner side of the opening of the earpiece hole of the panel is covered with a mesh sheet. To ensure that the electronic product can work normally, before assembling the panel with the housing and other components of the electronic product, the air tightness of the sheet covering the inner side of the opening of the earpiece hole on the panel of the electronic product needs to be tested to prevent water, air or dust from entering the electronic product during use. However, there is currently no instrument specifically used for air tightness testing on the panel of the screen of an electronic product.

[0003] Therefore, the above problems need to be solved urgently. Summary of the invention

[0004] The object of the present invention is to provide an airtightness detection device for detecting the airtightness of a sheet material covering the inner side of the opening of the earpiece hole of the panel of the screen of an electronic product.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] An air tightness detection device is used to detect the air tightness of a sheet material covering the inner side of an opening of a first through hole of a panel, the air tightness detection device comprising:

[0007] a carrier configured to carry the panel;

[0008] a covering member disposed above the carrier, the covering member being capable of rising and falling relative to the carrier and being pressed against the carrier, the covering member being provided with a first groove, and the covering member being concavely provided with a second groove and / or the carrier being concavely provided with a third groove, when the covering member is pressed against the carrier, part of the covering member being able to be pressed against the panel, so that a first cavity is formed between an inner wall of the first groove and the panel, and the second groove and / or the third groove are formed as a chamber of a second cavity, the orifices at both ends of the first through hole being respectively connected with the first cavity and the second cavity, and the carrier or the covering member being provided with an inflation port connected with one of the first cavity and the second cavity; and

[0009] The air tightness detector is configured to detect the air pressure of the other of the first cavity and the second cavity.

[0010] Preferably, the covering member includes a first sealing ring, which is arranged on the outer periphery of the first groove. When the covering member is pressed against the carrier, the first sealing ring is pressed against the panel, and the first through hole is located on the inner side of the first sealing ring.

[0011] Preferably, part of the first sealing ring is located outside the contour of the panel.

[0012] Preferably, the airtightness detection device also includes a second sealing ring and a third sealing ring, the second sealing ring is arranged on the carrier, the second sealing ring is pressed against the bottom of the panel, the third sealing ring is arranged on the carrier or the cover, when the cover is pressed against the carrier, the third sealing ring is pressed between the cover and the carrier, and the second groove and / or the third groove are located between the second sealing ring and the third sealing ring.

[0013] Preferably, the carrier is provided with a suction nozzle, and the suction nozzle is located on the inner side of the second sealing ring. When the panel is carried on the carrier, the suction nozzle can adsorb the panel.

[0014] Preferably, when the panel is carried on the carrier, a third cavity is formed between the panel, the second sealing ring and the carrier, and a second through hole is provided on the carrier, and the second through hole connects the third cavity with the outside.

[0015] Preferably, the carrier is provided with a plurality of positioning blocks, and the panel can be pressed and confined between the plurality of positioning blocks.

[0016] Preferably, when the cover is away from the carrier, the top of the positioning block is located above the upper surface of the panel carried by the carrier, and a spring is connected below the positioning block, and the spring can be elastically deformed so that the cover can push the positioning block down.

[0017] Preferably, the air tightness detection device further comprises a base, a slide rail is mounted on the base, the carrier is slidably connected to the slide rail via a slider, and the carrier can move along the slide rail to transport the panel to directly below the cover.

[0018] Preferably, the airtightness detection device further comprises a first photoelectric sensor, and the first photoelectric sensor is configured to detect whether the panel is carried on the carrier.

[0019] Beneficial effects of the present invention: In the present invention, when the cover is pressed against the carrier, the orifices at both ends of the first through hole are respectively connected to the first cavity and the second cavity, and air is inflated into the second cavity through the inflation port connected to the second cavity to increase the air pressure in the second cavity. At the same time, the air pressure in the first cavity is detected by an air tightness detector to determine the amount of gas leaked from the second cavity through the sheet into the first cavity. If the amount of leaked gas meets the requirements, the air tightness of the sheet is determined to be qualified; if the amount of leaked gas meets the requirements, the air tightness of the sheet is determined to be unqualified, thereby detecting the air tightness of the sheet covering the inner side of the orifice of the first through hole of the panel of the mobile phone screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of an airtightness detection device other than the airtightness detection instrument in an embodiment of the present invention;

[0021] Figure 2 is a top view of the airtightness detection device in an embodiment of the present invention;

[0022] Figure 3 is along Figure 2 Sectional view along line AA;

[0023] Figure 4 yes Figure 3 A partial enlarged view of point C in the middle;

[0024] Figure 5 is along Figure 2 Sectional view along the midline BB;

[0025] Figure 6 yes Figure 5 A partial enlarged view of point D in the middle;

[0026] Figure 7 is a schematic structural diagram of a carrier carrying a panel in an embodiment of the present invention;

[0027] Figure 8 is a top view of the carrier in the embodiment of the present invention.

[0028] In the figure:

[0029] 110. panel; 111. first through hole;

[0030] 210, carrier; 211, third groove; 212, nozzle; 213, second through hole; 214, positioning block; 215, spring; 216, slider;

[0031] 220, covering member; 221, first covering portion; 2211, second groove; 222, second covering portion; 2221, first groove; 2222, first sealing ring; 223, vent screw; 224, charging port; 225, detection port;

[0032] 230. Air tightness tester;

[0033] 240, second sealing ring;

[0034] 250, third sealing ring;

[0035] 260, base; 261, slide rail;

[0036] 270, first photoelectric sensor;

[0037] 280. Second photoelectric sensor; 281. Slot-type photoelectric switch; 282. Shading sheet. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0039] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0042] like Figure 7 As shown, a first through hole 111, i.e., a receiver hole, is usually provided on the panel 110 of the mobile phone screen. An opening at one end of the first through hole 111 is provided on a side of the panel 110 that can face the inside of the mobile phone shell, i.e., a side on which electronic components are installed, and an opening at the other end is provided on a side of the panel 110 or a side facing the outside of the mobile phone shell, and a mesh sheet material (not shown in the figure) is covered on the inner side of the opening of the first through hole 111. In order to prevent water, air or dust from entering the mobile phone during use, thereby affecting the service life of the mobile phone, before assembling the panel 110 with components such as the shell of the mobile phone, it is necessary to test the air tightness of the sheet material covering the inner side of the opening of the first through hole 111 of the panel 110.

[0043] To this end, this embodiment provides an airtightness detection device, which is used to detect the airtightness of the sheet material covering the inner side of the opening of the first through hole 111 of the panel 110, see Figures 1 to 8 The airtightness detection device includes a carrier 210, a cover 220 and an airtightness detector 230. The carrier 210 is configured to carry the panel 110. The cover 220 is arranged above the carrier 210. The cover 220 can be lifted and lowered relative to the carrier 210 and pressed against the carrier 210. The cover 220 is provided with a first groove 2221, and the cover 220 is concavely provided with a second groove 2211 and / or the carrier 210 is concavely provided with a third groove 211. When the cover 220 is pressed against the carrier 210, part of the cover 220 covers the airtightness detection device 230. The component 220 can be pressed against the panel 110 to form a first cavity between the inner wall of the first groove 2221 and the panel 110, and to form the second groove 2211 and / or the third groove 211 into a chamber of the second cavity. The orifices at both ends of the first through hole 111 are respectively connected to the first cavity and the second cavity. An inflation port 224 connected to one of the first cavity and the second cavity is provided on the carrier 210 or the cover 220, and the airtightness detector 230 is configured to detect the air pressure of the other of the first cavity and the second cavity.

[0044] In this embodiment, the air filling port 224 is connected to the second cavity, and the air tightness detector 230 is configured to detect the air pressure of the first cavity. When the cover 220 is pressed against the carrier 210, the orifices at both ends of the first through hole 111 are respectively connected to the first cavity and the second cavity, and the second cavity is filled with air through the air filling port 224 connected to the second cavity to increase the air pressure in the second cavity. At the same time, the air pressure of the first cavity is detected by the air tightness detector 230 to determine the amount of gas leaked from the second cavity through the sheet into the first cavity. If the amount of gas leaked meets the requirements, the air tightness of the sheet is determined to be qualified. If the amount of gas leaked does not meet the requirements, the air tightness of the sheet is determined to be unqualified, thereby detecting the air tightness of the sheet covered on the inner side of the orifice of the first through hole 111 of the panel 110 of the mobile phone screen.

[0045] Specifically, when the panel 110 is carried on the carrier 210, the panel 110 can face the side facing the inside of the mobile phone shell upwards, and when the cover 220 is pressed against the carrier 210, the first groove 2221 is located directly above the panel 110, and the opening of the first through hole 111 at one end of the side of the panel 110 facing the inside of the mobile phone shell is directly opposite to the first groove 2221, the opening of the first through hole 111 at one end of the side of the panel 110 can face the second groove 2211, and the opening of the first through hole 111 at one end of the side of the panel 110 facing the outside of the mobile phone shell can face the third groove 211, so that the other end is suitable for The opening is opened on the side of the panel 110 or the first through hole 111 facing the outside of the mobile phone shell. In this embodiment, the cover 220 is recessed with a second groove 2211 and the carrier 210 is recessed with a third groove 211. The cover 220 includes a first covering portion 221 and a second covering portion 222. The first covering portion 221 is recessed with a fourth groove. The second covering portion 222 is located in the fourth groove and is connected to the bottom of the fourth groove by a vent screw 223. The gap between the side groove wall of the fourth groove of the first covering portion 221 and the second covering portion 222 forms the second groove 2211, and the second covering portion 222 is recessed with a first groove 2221.

[0046] When the panel 110 is carried on the carrier 210, the second covering portion 222 can be pressed against the panel 110, the first covering portion 221 is pressed against the carrier 210, and the second groove 2211 is connected to the third groove 211 to form a second cavity. The first covering portion 221 is provided with an inflation port 224 and a detection port 225. The inflation port 224 is connected to the second groove 2211, and the end of the inflation port 224 away from the second groove 2211 is connected to an inflation device (not shown in the figure), and air is inflated into the second cavity through the inflation device. The detection port 225 is connected to the screw hole of the vent screw 223, and the airtightness detector 230 is connected to the end of the detection port 225 away from the screw hole of the vent screw 223 to detect the air pressure of the first cavity. The airtightness detection device in this embodiment can automatically detect the airtightness of the panel 110 of the mobile phone screen, and the detection is fast and efficient with high accuracy.

[0047] like Figure 4 and Figure 6 As shown, the second covering portion 222 of the covering member 220 in this embodiment includes a first sealing ring 2222, and the first sealing ring 2222 is arranged on the outer periphery of the first groove 2221. When the covering member 220 is pressed against the carrier 210, the first sealing ring 2222 is pressed against the panel 110, and the first through hole 111 is located on the inner side of the first sealing ring 2222. The first sealing ring 2222 can seal the first cavity to ensure the accuracy of the detection result of the airtightness detector 230.

[0048] Since the panel 110 of the mobile phone screen in this embodiment is relatively thin, in order to avoid damaging the panel 110 when the second covering part 222 is pressed against the panel 110, part of the first sealing ring 2222 in this embodiment is located outside the outline of the panel 110, that is, this embodiment can ensure that it is the first sealing ring 2222 that presses against the panel 110, so that the second covering part 222 is in flexible contact with the panel 110, thereby ensuring the safety of the airtightness detection.

[0049] Accordingly, please continue to refer to Figure 4 and Figure 6 In this embodiment, the airtightness detection device also includes a second sealing ring 240 and a third sealing ring 250. The second sealing ring 240 is arranged on the carrier 210, and the second sealing ring 240 is pressed against the bottom of the panel 110. The third sealing ring 250 is arranged on the carrier 210 or the cover 220. When the cover 220 is pressed against the carrier 210, the third sealing ring 250 is pressed between the cover 220 and the carrier 210. The second groove 2211 and the third groove 211 are located between the second sealing ring 240 and the third sealing ring 250. The second sealing ring 240 and the third sealing ring 250 can seal the second cavity to further ensure the accuracy of the detection result of the airtightness detector 230.

[0050] It is understandable that when the panel 110 is carried on the carrier 210 , the second sealing ring 240 is pressed against the bottom of the panel 110 , that is, the panel 110 and the carrier 210 are in flexible contact, so as to prevent the carrier 210 from damaging the panel 110 when the second covering portion 222 presses against the panel 110 .

[0051] The airtightness detection device in this embodiment further includes a first photoelectric sensor 270, and the first photoelectric sensor 270 is configured to detect whether the carrier 210 carries the panel 110. Figure 7 and Figure 8 As shown, the light emitter and light receiver of the first photoelectric sensor 270 are respectively located on both sides of the carrier 210. When the staff places the panel 110 on the carrier 210, the light path can be blocked, thereby triggering the light receiver, and the light receiver can output control signals to the inflation device and the air tightness detector 230.

[0052] To facilitate the staff to place the panel 110 on the carrier 210 or remove the panel 110 that has been tested from the carrier 210, please refer to Figure 1 and Figure 2 In this embodiment, the airtightness detection device also includes a base 260, on which a slide rail 261 is installed. The carrier 210 is slidably connected to the slide rail 261 through a slider 216. The carrier 210 can reciprocate along the slide rail 261 relative to the cover 220 to transport the panel 110 to the bottom of the cover 220, or to transport the panel 110 that has completed the inspection to the side away from the cover 220.

[0053] Furthermore, the airtightness detection device in this embodiment also includes a second photoelectric sensor 280, which includes a slot-type photoelectric switch 281 and a shading sheet 282 that can be placed in the detection slot of the slot-type photoelectric switch 281. The slot-type photoelectric switch 281 and the shading sheet 282 are selectively installed on the slide rail 261 and the carrier 210 to detect the position of the carrier 210, thereby ensuring that the panel 110 can be located directly below the cover 220, and further ensuring that the first through hole 111 is opened at one end of the panel 110 facing the inside of the mobile phone case and is directly opposite to the first groove 2221 to ensure the accuracy of the detection.

[0054] In order to further ensure that the opening of the first through hole 111 at one end of the surface of the panel 110 facing the inside of the mobile phone shell is opposite to the first groove 2221, and at the same time to ensure that the opening of the first through hole 111 at one end of the side surface of the panel 110 can be opposite to the second groove 2211, and the opening of the first through hole 111 at one end of the surface of the panel 110 facing the outside of the mobile phone shell can be opposite to the third groove 211, that is, to ensure that the openings at both ends of the first through hole 111 can be connected to the first cavity and the second cavity respectively, in this embodiment, when the panel 110 is placed on the carrier 210, it is necessary to position the panel 110. For this purpose, Figure 7 and Figure 8 As shown, the carrier 210 in this embodiment is provided with a plurality of positioning blocks 214 , and the plurality of positioning blocks 214 can press against the side of the panel 110 . When the panel 110 is carried on the carrier 210 , the panel 110 can be pressed and confined between the plurality of positioning blocks 214 .

[0055] Since the thickness of the mobile phone panel 110 in this embodiment is relatively thin, if the top of the positioning block 214 is flush with the upper surface of the panel 110 carried by the carrier 210, the contact area between the positioning block 214 and the panel 110 is relatively small, and the panel 110 may move relative to the carrier 210. When the panel 110 moves back and forth along the slide rail 261 with the carrier 210, it may be separated from the carrier 210, causing damage to the panel 110. Therefore, in this embodiment, when the cover 220 is away from the carrier 210, that is, when the panel 110 is When the carrier 210 reciprocates along the slide rail 261, the top end of the positioning block 214 is located above the upper surface of the panel 110 supported by the carrier 210. In order to avoid interference between the positioning block 214 and the first sealing ring 2222 during the descending process of the cover 220, a spring 215 is connected below the positioning block 214 in this embodiment. The spring 215 can be elastically deformed so that the cover 220 can push the positioning block 214 to descend, thereby ensuring that the first sealing ring 2222 can be pressed against the panel 110.

[0056] like Figure 8 As shown, in this embodiment, the carrier 210 is provided with a suction nozzle 212, which is located on the inner side of the second sealing ring 240. When the panel 110 is carried on the carrier 210, the suction nozzle 212 can absorb the panel 110 to further ensure that the position of the panel 110 will not change during the detection process.

[0057] Since the second sealing ring 240 is pressed between the panel 110 and the carrier 210, there is a gap between the panel 110 and the carrier 210, that is, when the panel 110 is carried on the carrier 210, a third cavity is formed between the panel 110, the second sealing ring 240 and the carrier 210. When the panel 110 is carried on the carrier 210, there is air in the third cavity. When the first sealing ring 2222 descends and presses against the panel 110, the air pressure in the third cavity rises, and the air pressure in the first cavity before inflating the second cavity is equal to the atmospheric pressure. Therefore, the panel 110 will be subjected to an upward force, which may cause damage to the panel 110. To avoid damage to the panel 110, a second through hole 213 is provided on the carrier 210 in this embodiment. The second through hole 213 connects the third cavity with the outside world, so that the air pressure in the third cavity is always equal to the atmospheric pressure when the first sealing ring 2222 descends and presses against the panel 110.

[0058] Of course, in other optional embodiments, the airtightness detection device can also be used to detect the airtightness of the sheet material inside the opening of the first through hole 111 of the panel 110 of the screen of electronic products such as tablet computers or smart watches.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An airtightness detection device for detecting the airtightness of a sheet material covering the inner side of the opening of a first through hole (111) of a panel (110), characterized in that: The airtightness detection device comprises: A carrier (210) configured to carry the panel (110); The cover (220) is arranged above the carrier (210). The cover (220) can be lifted and lowered relative to the carrier (210) and pressed against the carrier (210). The cover (220) is provided with a first groove (2221), and a second groove (2211) is concavely provided on the cover (220) and a third groove (211) is concavely provided on the carrier (210). When the cover (220) is pressed against the carrier (210), part of the cover (220) can The first through hole (111) is pressed against the panel (110) so that a first cavity is formed between the inner wall of the first groove (2221) and the panel (110), and the second groove (2211) and the third groove (211) form a chamber of a second cavity, the openings at both ends of the first through hole (111) are respectively connected to the first cavity and the second cavity, and the carrier (210) or the cover (220) is provided with an inflation port (224) connected to one of the first cavity and the second cavity; and An airtightness detector (230) configured to detect the air pressure of the other of the first cavity and the second cavity; The carrier (210) is provided with a plurality of positioning blocks (214), and the panel (110) can be pressed and confined between the plurality of positioning blocks (214); When the cover (220) is away from the carrier (210), the top end of the positioning block (214) is located above the upper surface of the panel (110) supported by the carrier (210), and a spring (215) is connected below the positioning block (214), and the spring (215) can undergo elastic deformation so that the cover (220) can push the positioning block (214) down.

2. The airtightness detection device according to claim 1, characterized in that: The cover (220) includes a first sealing ring (2222), which is arranged on the outer periphery of the first groove (2221). When the cover (220) is pressed against the carrier (210), the first sealing ring (2222) is pressed against the panel (110), and the first through hole (111) is located on the inner side of the first sealing ring (2222).

3. The airtightness detection device according to claim 2, characterized in that: Part of the first sealing ring (2222) is located outside the contour of the panel (110).

4. The airtightness detection device according to claim 2, characterized in that: The airtightness detection device also includes a second sealing ring (240) and a third sealing ring (250), wherein the second sealing ring (240) is arranged on the carrier (210), and the second sealing ring (240) is pressed against the bottom of the panel (110); the third sealing ring (250) is arranged on the carrier (210) or the cover (220); when the cover (220) is pressed against the carrier (210), the third sealing ring (250) is pressed between the cover (220) and the carrier (210), and the second groove (2211) and / or the third groove (211) are located between the second sealing ring (240) and the third sealing ring (250).

5. The airtightness detection device according to claim 4, characterized in that: The carrier (210) is provided with a suction nozzle (212), and the suction nozzle (212) is located on the inner side of the second sealing ring (240). When the panel (110) is carried on the carrier (210), the suction nozzle (212) can suck the panel (110).

6. The airtightness detection device according to claim 4, characterized in that: When the panel (110) is carried on the carrier (210), a third cavity is formed between the panel (110), the second sealing ring (240) and the carrier (210), and a second through hole (213) is provided on the carrier (210), and the second through hole (213) connects the third cavity with the outside.

7. The airtightness detection device according to claim 1, characterized in that: The airtightness detection device also includes a base (260), a slide rail (261) is installed on the base (260), the carrier (210) is slidably connected to the slide rail (261) via a slider (216), and the carrier (210) can move along the slide rail (261) to transport the panel (110) to directly below the cover (220).

8. The airtightness detection device according to claim 1, characterized in that: The airtightness detection device further comprises a first photoelectric sensor (270), wherein the first photoelectric sensor (270) is configured to detect whether the panel (110) is carried on the carrier (210).

Images