Airtightness test mold and airtightness test device

Abstract

The present application discloses an airtightness test mold and an airtightness test device. The mold is used to test the airtightness of a semi-annular device. The mold includes a first template and a second template. The first template is provided with a semi-annular groove for accommodating the device. The inner side of the semi-annular groove is provided with an inner sealing ring, and the outer side of the semi-annular groove is provided with an outer sealing ring. The second template is pressed onto the first template in a detachable manner so that the semi-annular groove constitutes a closed cavity. An air inlet is formed on the groove wall of the semi-annular groove. The first template is provided with an exhaust hole within the area enclosed by the inner sealing ring, or the second template is provided with an exhaust hole at a position corresponding to the area enclosed by the inner sealing ring. The present application can optimize the structure of the airtightness test mold and ensure the accuracy of the airtightness test results.

Description

Technical Field

[0001] The present application relates to the technical field of air tightness testing, and in particular to an air tightness testing mold and an air tightness testing device. Background Art

[0002] After manufacturing, some devices often need to be tested for airtightness, among other things. Existing airtightness testing methods primarily involve placing the device in an airtightness test mold, increasing the pressure within the mold cavity, and determining the device's airtightness test results based on the actual pressure change within the mold cavity. However, due to suboptimal structures in existing airtightness test molds, airtightness test results are inaccurate. Summary of the Invention

[0003] This application proposes an airtightness test mold and an airtightness test device to optimize the airtightness test mold structure and ensure the accuracy of the airtightness test results.

[0004] In order to solve the above technical problems, the present application proposes an airtightness testing mold, which is used to test the airtightness of a semi-annular device; the mold includes a first template and a second template.

[0005] The first template is provided with a semi-annular groove for accommodating the component, an inner sealing ring is provided on the inner side of the semi-annular groove, and an outer sealing ring is provided on the outer side of the semi-annular groove;

[0006] The second template is detachably pressed onto the first template so that the semi-annular groove forms a closed cavity;

[0007] An air inlet is formed on the groove wall of the semi-annular groove; an exhaust hole is provided in the area enclosed by the inner sealing ring of the first template, or at a position of the second template corresponding to the area enclosed by the inner sealing ring.

[0008] Wherein, a protrusion of the adapter member is provided on the first template, and the semi-annular groove includes a receiving groove formed on the protrusion.

[0009] The protrusion is connected to the first template through a fixing piece, the fixing piece is inserted into a fixing hole on the first template, and a through hole communicating with the fixing hole is provided on the fixing piece.

[0010] The fixing member is a bolt, and the through hole passes through the bolt in the axial direction of the bolt.

[0011] The device is an earphone, which includes a semi-circular connecting portion, two ear-wearing portions respectively connected to both ends of the connecting portion, and two sound-producing portions respectively connected to the two ear-wearing portions;

[0012] The semi-annular groove further comprises a connecting groove and a pronunciation groove, wherein the connecting groove, the accommodating groove and the pronunciation groove are separately arranged;

[0013] The second template is provided with a connecting groove corresponding to the protrusion and the pronunciation part groove. When the second template is pressed on the first template, the connecting groove enables the connecting part groove, the accommodating groove and the pronunciation part groove to form a connected closed cavity.

[0014] The air inlet hole is located on the groove wall of the connecting portion groove.

[0015] The semi-annular groove is arranged conformally with the device.

[0016] A first positioning structure is formed on the outer side of the outer sealing ring of the first template, which cooperates with the second positioning structure on the second template, so that the second template is accurately pressed on the first template.

[0017] Wherein, the airtightness testing device comprises the airtightness testing mold according to any one of claims 1-8.

[0018] Among them, the number of airtightness test molds is 2.

[0019] The first template of the present application is provided with a semi-annular groove for accommodating the device, and an outer sealing ring is provided on the outer side of the semi-annular groove. The second template is pressed on the first template in a detachable manner, so that the outer sealing ring can cooperate with the first template and the second template to form a cavity, and an inner sealing ring is provided on the inner side of the semi-annular groove. The inner sealing ring provided on the inner side of the semi-annular groove can divide the cavity into a closed cavity for accommodating earphones and a sub-cavity, which can reduce the volume of the closed cavity for accommodating earphones, so that when the pressure in the closed cavity changes slightly, the pressure change can be accurately tested, thereby improving the sensitivity of the air tightness test; the first template is provided with an exhaust hole in the area enclosed by the inner sealing ring, or the position of the second template corresponding to the area enclosed by the inner sealing ring, which can connect the sub-cavity formed by the inner sealing ring, the first template and the second template with the outside world, thereby preventing gas fluctuations in the closed cavity due to the existence of the sub-cavity that is not connected to the outside world, ensuring the accuracy of the air tightness test, and optimizing the structure of the air tightness test mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 This is an exploded schematic diagram of an embodiment of an airtightness test mold of the present application;

[0022] Figure 2 This is a schematic structural diagram of an embodiment of the earphone of the present application;

[0023] Figure 3 This is a structural diagram of an embodiment of the first template in the airtightness test mold of the present application;

[0024] Figure 4 yes Figure 3 A partial schematic diagram of area A in the first template shown;

[0025] Figure 5 It is a structural schematic diagram of an embodiment of the second template in the airtightness test mold of the present application. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] After some devices are manufactured, it is necessary to test the airtightness performance of the device. The device can be a semi-ring device.

[0028] The airtightness of a device can be tested using an airtightness testing device. Specifically, the airtightness testing device can include an airtightness testing mold. When testing the airtightness of a device, the device can be placed in the airtightness testing mold. The sealed cavity in the airtightness testing mold, which is used to accommodate the device, is first inflated. The airtightness performance of the device is then checked by measuring the pressure change in the sealed cavity.

[0029] In this embodiment, the number of airtightness test molds may be two. The two airtightness test molds may be used to place the standard component and the device under test, respectively. Whether the airtightness of the device under test meets the requirements can be determined by detecting the difference in gas inside the two molds used to place the standard component and the device under test.

[0030] Specifically, the following content describes the structure of the airtightness test mold in detail.

[0031] See also Figure 1 , Figure 1 1 is a schematic diagram of the three-dimensional structure of an embodiment of the airtightness test mold 100 of the present application. The airtightness test mold of this embodiment is used to test the airtightness of a semi-annular device. Figure 1As shown, the airtightness test mold 100 may include a first template 110 and a second template 120. The second template 120 is detachably pressed onto the first template 110, thereby forming a closed cavity for accommodating the semi-annular device. Specifically, during testing, the second template 120 is pressed onto the first template 110. When not in testing mode, the second template 120 may or may not be pressed onto the first template 110.

[0032] In this embodiment, the first template 110 is provided with a semi-annular groove 111 for accommodating a device. An inner sealing ring is provided inside the semi-annular groove 111, and an outer sealing ring is provided outside the semi-annular groove 111. Specifically, the second template 120 is pressed against the first template 110, so that the semi-annular groove 111 forms a closed cavity for accommodating the device. The semi-annular shape is not strictly semi-circular; it can be a non-enclosed ring. Furthermore, the semi-annular groove 111 can have a generally regular shape, such as an arc, or an irregular shape. It is understood that the outer sealing ring can cooperate with the first and second templates 110, 120 to form a cavity. The inner sealing ring provided inside the semi-annular groove 111 divides the cavity into a closed cavity for accommodating the semi-annular device and a sub-cavity, thereby reducing the volume of the closed cavity for accommodating the semi-annular device. This allows accurate detection of pressure changes even when the pressure within the closed cavity undergoes slight changes, thereby improving the sensitivity of the airtightness test.

[0033] In one implementation, a sealing ring groove 118 for accommodating the inner sealing ring and the outer sealing ring may be provided on the first template 110, which can facilitate the setting of the inner sealing ring and the outer sealing ring and prevent the inner sealing ring and the outer sealing ring from being displaced to avoid affecting the air tightness test results.

[0034] In another implementation, the inner sealing ring and the outer sealing ring may be fixed to the first template 110 by bonding.

[0035] Optionally, the first template 110 may be provided with vent holes 113 within the area enclosed by the inner sealing ring. The vent holes 113 allow the sub-cavity to be connected to the surrounding environment, preventing gas fluctuations in the closed cavity caused by the presence of the sub-cavity not connected to the surrounding environment, thereby avoiding affecting the air tightness test results and ensuring the accuracy of the air tightness test results.

[0036] It is understandable that the second template 120 is provided with an exhaust hole 113 at a position corresponding to the area enclosed by the inner sealing ring.

[0037] In this embodiment, the semi-annular groove 111 can be configured conformally with the device, so that the specific shape of the groove is adapted to the device, which can reduce the volume used to accommodate the semi-annular device, thereby improving the sensitivity of detection and ensuring the accuracy of the airtightness test.

[0038] Furthermore, if Figure 2 As shown, the semi-circular device can be an earphone 200. The earphone 200 can include a semi-circular connecting portion 210, two ear-worn portions 220 respectively connected to both ends of the semi-circular connecting portion 210, and two sound-producing portions 230 respectively connected to the two ear-worn portions 220. The earphone 200 can be a bone conduction earphone or other earphone.

[0039] Accordingly, if Figure 3 As shown, the semi-annular groove 111 includes a connecting groove 1111, a protrusion 112 and a pronunciation groove 1113. The protrusion 112 may be formed with a receiving groove 1112. The connecting groove 1111, the receiving groove 1112 and the pronunciation groove 1113 are separated.

[0040] like Figure 5 As shown, a connecting groove 122 is provided on the second template 120 corresponding to the protrusion 112 and the sound-producing groove 1113. When the second template 120 is pressed against the first template 110, the connecting groove 122 connects the connecting groove 1111, the receiving groove 1112, and the sound-producing groove 1113 to form a connected, enclosed cavity. The closed cavity formed by the connecting groove 122 on the second template 120 and the connecting groove 1111, the receiving groove 1112, and the sound-producing groove 1113 on the first template 110 can be matched with the earphone 200, thereby improving the accuracy of the airtightness test results.

[0041] In this embodiment, a protrusion 112 of the adapter component is provided on the first template 110. The semi-annular groove 111 may include a receiving groove 1112 formed on the protrusion 112 to facilitate supporting and fixing the component.

[0042] In one implementation, the two protrusions 112 may be integrally formed with the first template 110 .

[0043] like Figure 3 and Figure 4 As shown, in another implementation, the protrusion 112 is connected to the first template 110 via a fixing member 114, so as to avoid the protrusion 112 and the first template 110 being integrally formed, which would increase the manufacturing difficulty. The fixing member 114 can be a bolt, stud, screw or rivet.

[0044] In addition, the fixing member 114 can be inserted into the fixing hole 115 on the first template 110. The fixing member 114 is provided with a through hole 1141 communicating with the fixing hole 115.

[0045] The inventors of the present application discovered that when the bump 112 is fixed to the first template 110 by the fixing member 114, the gas in the fixing hole 115 and the gas in the receiving groove 1112 both exert a certain force on the fixing member 114. When the fixing hole 115 and the receiving groove 1112 are not connected, when the airtightness performance of the device is tested, the pressure in the receiving groove 1112 changes, and the pressure in the fixing hole 115 does not change or only changes slightly, resulting in only the force exerted on the fixing member 114 by the gas in the receiving groove 1112 changing. As a result, the fixing member 114 is subjected to an unbalanced force, which may cause the fixing member 114 to move, thereby affecting the airtightness test results. Therefore, the present application connects the fixing hole 115 and the receiving groove 1112 through the through hole 1141, which can prevent the fixing member 114 from being subjected to an unbalanced force and prevent the fixing member 114 from moving due to the pressure change in the receiving groove 1112.

[0046] In addition, due to workmanship accuracy issues, the volumes of the fixing hole 115 in the mold where the standard part is located and the mold where the test part is located are not guaranteed to be consistent, and the fixing part 114 may not be completely matched with the fixing hole 115 and cannot block the fixing hole 115. During the air tightness test, the amount of gas leaked from the groove 1112 to the fixing hole 115 in the same amount of time may be different. As a result, the different amount of leaked gas will cause a difference in the air pressure in the test cavity of the mold where the standard part is located and the air pressure in the test cavity of the mold where the test part is located, which will lead to errors in the gas pressure difference measured during the air tightness test. The inventors of the present application discovered that compared with the case where the fixing hole 115 and the receiving groove 1112 are not connected, by adding the through hole 1141 to connect the fixing hole 115 and the receiving groove 1112, after the test cavity in the mold where the standard part is located and the test part are located is filled with a certain pressure of gas during the air tightness test, the air pressure in the fixing hole 115 is the same as the air pressure in the receiving groove 1112, and the problem of gas leakage caused by the difference in air pressure between the fixing hole 115 and the receiving groove 1112 may not occur, thereby avoiding the error caused by the different amount of gas entering.

[0047] The through hole 1141 only needs to connect the fixing hole 115 and the receiving groove 1112, and the specific location is not limited. Preferably, the through hole 1141 passes through the fixing member 114 in the axial direction of the fixing member 114, which can reduce the difficulty of forming the through hole 1141 on the fixing member 114.

[0048] In order to facilitate the inflation of air into the closed cavity, an air inlet 116 may be formed on the groove wall of the semi-annular groove 111. Specifically, when the semi-annular device is an earphone 200, an air inlet 116 may be formed on the groove wall of the connecting portion groove 1111.

[0049] The air inlet 116 can communicate with the enclosed cavity. It is understood that when testing the airtightness of the earphone 200, air can be inflated into the enclosed cavity through the air inlet 116. When the air is inflated to a certain level, the inflation can be stopped, and the pressure change in the enclosed cavity can be tested. Furthermore, the air inlet 116 can also be used to exhaust air after the test is completed.

[0050] In one implementation, the air inlet 116 may be two interconnected blind holes provided on the first template 110. The openings of the two blind holes are respectively connected to the closed cavity and the inflation tube in the air tightness test device, so that the inflation tube can inflate air into the closed cavity through the two blind holes.

[0051] In another implementation, the air inlet 116 may also be a through hole 1141 provided on the groove wall of the semi-annular groove 111 , so that air can be inflated into the closed cavity through the through hole 1141 on the groove wall, thereby reducing the required processing accuracy.

[0052] like Figure 5 As shown, further, a first positioning structure 117 is formed on the outer side of the outer sealing ring, which cooperates with the second positioning structure 121 on the second template 120 to accurately press the second template 120 onto the first template 110. The first positioning structure 117 and the second positioning structure 121 can be mutually cooperating positioning columns and positioning holes.

[0053] In summary, the first template 110 is provided with a semi-annular groove 111 for accommodating the device, an outer sealing ring is provided on the outer side of the semi-annular groove 111, and the second template 120 is pressed on the first template 110 in a detachable manner, so that the outer sealing ring can cooperate with the first template 110 and the second template 120 to form a cavity, and an inner sealing ring is provided on the inner side of the semi-annular groove 111. The inner sealing ring provided on the inner side of the semi-annular groove 111 can divide the cavity into a closed cavity for accommodating the earphone 200 and a sub-cavity, which can reduce the volume of the closed cavity for accommodating the earphone 200, thereby When there is a slight change in the pressure in the closed cavity, the pressure change can also be accurately tested, thereby improving the sensitivity of the air tightness test; the first template 110 is provided with an exhaust hole 113 in the area enclosed by the inner sealing ring, or the second template 120 is provided with an exhaust hole 113 at a position corresponding to the area enclosed by the inner sealing ring, which can connect the sub-cavity formed by the inner sealing ring, the first template 110 and the second template 120 with the outside world, thereby preventing gas fluctuations in the closed cavity due to the existence of the sub-cavity that is not connected to the outside world, ensuring the accuracy of the air tightness test, and optimizing the structure of the air tightness test mold 100.

[0054] The above is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An airtightness test mold, characterized in that: The mold is used to test the air tightness of a semi-annular device; the mold comprises: A first template is provided with a semi-annular groove for accommodating the device, an inner sealing ring is provided on the inner side of the semi-annular groove, and an outer sealing ring is provided on the outer side of the semi-annular groove; a second template, pressed onto the first template in a detachable manner so that the semi-annular groove forms a closed cavity; An air inlet is formed on the groove wall of the semi-annular groove; an exhaust hole communicating with the outside is provided in the area enclosed by the inner sealing ring on the first template or in a position corresponding to the area enclosed by the inner sealing ring on the second template; The first template is provided with a bump adapted to the device, and the semi-annular groove includes a receiving groove formed on the bump; The protrusion is connected to the first template through a fixing piece. The fixing piece is inserted into a fixing hole on the first template. The fixing piece is provided with a through hole communicating with the fixing hole and the accommodating groove.

2. The mold according to claim 1, characterized in that The fixing member is a bolt, and the through hole penetrates the bolt in the axial direction of the bolt.

3. The mold according to claim 1, characterized in that The device is an earphone, comprising a semi-circular connecting portion, two ear-worn portions respectively connected to both ends of the connecting portion, and two sound-producing portions respectively connected to the two ear-worn portions; The semi-annular groove further comprises a connecting groove and a pronunciation groove, wherein the connecting groove, the accommodating groove and the pronunciation groove are arranged separately; The second template is provided with a connecting groove corresponding to the protrusion and the pronunciation part groove. When the second template is pressed onto the first template, the connecting groove enables the connecting part groove, the accommodating groove and the pronunciation part groove to form a connected closed cavity.

4. The mold according to claim 3, characterized in that The air inlet hole is located on the groove wall of the connecting portion groove.

5. The mold according to claim 1, characterized in that The semi-annular groove is arranged conformally with the device.

6. The mold according to claim 1, characterized in that A first positioning structure is formed on the outer side of the outer sealing ring of the first template, which cooperates with the second positioning structure on the second template, so that the second template is accurately pressed onto the first template.

7. An airtightness testing device, characterized in that: The airtightness testing device comprises the airtightness testing mold according to any one of claims 1 to 6.

8. The airtightness testing device according to claim 7, characterized in that: The number of the airtightness test molds is 2.

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