Test fixture

Abstract

The invention discloses a test fixture, and belongs to the technical field of testing. The test fixture comprises a pressing mechanism, a base and a plugging mechanism. And the plugging mechanism and the pressing mechanism are mounted on the base. The blocking mechanism is provided with a bearing face, a plurality of first channels and at least one second channel are arranged in the blocking mechanism, the first end of each first channel is exposed out of the bearing face, and the second ends of the first channels are mutually converged and communicated at the communication position. The first end of the second passage is communicated with the communication part, and the second end is exposed out of the plugging mechanism. At least one part of the abutting mechanism can move towards and away from the bearing face. By adopting the technical scheme provided by the embodiment of the invention, the detection efficiency of the to-be-detected workpiece can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of testing, in particular to a test fixture. BACKGROUND

[0002] With the increasingly complex and diversified environment of user application of electronic equipment products, the waterproof performance of electronic equipment is also required to be higher. In order to meet the needs of users, the product generally needs to be tested by real water during the production process. Real water test is a kind of air tightness detection method for detecting the water resistance and air permeability of the product, which is generally used for detecting the air tightness of through holes such as microphone holes and balance holes on watches, bracelets, mobile phones and other products. The test process generally needs to cooperate with air tightness detector and test fixture, that is, the test fixture is used to limit the workpiece to be tested at a fixed position and block the corresponding through hole, and then the air tightness detector is used to detect the water resistance and air permeability of the workpiece to be tested.

[0003] In the related art, the test fixture can only position and block a single through hole. That is to say, when there are multiple through holes on the workpiece to be tested, each through hole needs to be detected one by one, rather than simultaneously. If the above test fixture is used to detect the water resistance and air permeability of the multi-hole product, the operation process will be more complicated, which will reduce the detection efficiency. SUMMARY

[0004] Therefore, the embodiments of the present application provide a test fixture, which can improve the detection efficiency of the workpiece to be tested.

[0005] In one aspect, the embodiments of the present application provide a test fixture, which comprises a pressing mechanism, a base and a blocking mechanism.

[0006] The blocking mechanism and the pressing mechanism are installed on the base.

[0007] The blocking mechanism has a bearing surface, and a plurality of first passages and at least one second passage are arranged in the blocking mechanism. The first end of each first passage is exposed to the bearing surface, and the second end of each first passage is connected to the communication part. The first end of the second passage is connected to the communication part, and the second end of the second passage is exposed to the blocking mechanism.

[0008] At least a part of the pressing mechanism can move towards and away from the bearing surface.

[0009] Optionally, the base is provided with a through slot.

[0010] The blocking mechanism is located in the through slot, and the blocking mechanism comprises a bearing assembly and a sealing assembly. The bearing assembly and the sealing assembly are relatively combined in the through direction of the through slot.

[0011] The bearing assembly has the bearing surface, and is provided with a plurality of air release channels, the first channel and the second channel, first ends of the air release channels penetrating through a surface of the bearing assembly, second ends of the air release channels being opposite to the corresponding first channels, wherein the first ends of the air release channels are covered with a waterproof and air-permeable film;

[0012] The sealing assembly is located on a side of the bearing assembly away from the bearing surface, wherein the sealing assembly is capable of moving close to and away from the bearing assembly to seal and open the second ends of the air release channels.

[0013] Optionally, the sealing assembly comprises a fixed plate, a connecting plate, a first driving member and a plurality of first elastic members.

[0014] The fixed plate is connected to the base and is arranged opposite to the through groove.

[0015] Two ends of the first driving member are connected to the fixed plate and the connecting plate respectively, and the first driving member is capable of driving the connecting plate to move in a direction perpendicular to the fixed plate.

[0016] One end of the first elastic member is connected to the connecting plate, and the other end extends towards the first end of the air release channel, and the first elastic member moves synchronously with the connecting plate.

[0017] Optionally, the first elastic member comprises a support rod, a first baffle, a second baffle and a spring.

[0018] The first end of the support rod penetrates through the first baffle and the second baffle in sequence, and the second end of the support rod extends towards the first end of the air release channel.

[0019] Two ends of the spring are respectively abutted against the first baffle and a side of the connecting plate away from the fixed plate.

[0020] The second baffle is abutted against a side of the connecting plate facing the fixed plate.

[0021] Optionally, the bearing assembly is further provided with a third channel, a first end of the third channel being exposed on the bearing surface, and a second end of the third channel being in communication with the communication part.

[0022] The sealing mechanism further comprises a second driving member, the second driving member being installed in the bearing assembly, and an output end of the second driving member being used for conducting or blocking the first end and the second end of the third channel.

[0023] Optionally, the bearing assembly has a mounting cavity, the mounting cavity comprising a first side wall, a second side wall and a third side wall connected in sequence, the first side wall and the third side wall being arranged opposite to each other.

[0024] The second side wall is provided with a first through hole, which is in communication with the first end of the third passage;

[0025] The first side wall and the third side wall are respectively provided with a second through hole and a third through hole, the third through hole is in communication with the second end of the third passage, and the output end of the second driving member penetrates into the mounting cavity through the second through hole and is movable along the axial direction of the second through hole;

[0026] When the output end of the second driving member moves to the first position, the third through hole is blocked; when the output end of the second driving member moves to the second position, the third through hole is opened, so that the first through hole and the third through hole are in communication.

[0027] Optionally, the distance from the first end of each first passage to the communication position is equal.

[0028] Optionally, the distance from the first end of the third passage to the communication position is equal to the distance from the first end of each first passage to the communication position.

[0029] Optionally, the bearing assembly comprises a bearing member and a plurality of positioning members;

[0030] The bearing member has the bearing surface;

[0031] The plurality of positioning members are installed on the bearing surface, and at least two of the plurality of positioning members are arranged diagonally.

[0032] Optionally, the surface of the bearing member away from the bearing surface is provided with a plurality of first grooves, each of the first grooves converges and communicates at the communication position, and the bearing member is further provided with a plurality of first through holes, a first end of each first through hole is in communication with the bottom of a corresponding first groove, and a second end of each first through hole is exposed on the bearing surface, wherein the first groove and the corresponding first through hole constitute the first passage.

[0033] The bearing assembly further comprises a through member, and the through member is provided with the second passage, and the through member covers the opening of the first groove.

[0034] Optionally, the bearing assembly further comprises a first sealing member, one side of the first sealing member is connected to the side of the through member facing the bearing member, and the other side of the first sealing member covers the opening of the first groove.

[0035] Optionally, the bearing assembly further comprises a plurality of second sealing members, and the second sealing members are located on the bearing surface, and the second sealing members have fourth through holes in communication with corresponding first passages.

[0036] Optionally, the pressing mechanism comprises a bracket, a third driving member, a fourth driving member and a pressing block.

[0037] The bracket comprises a first side edge and a second side edge adjacent to each other;

[0038] The third driving member is connected to the first side edge and the base respectively, and is used to drive the bracket to move in a first direction;

[0039] The fourth driving member is connected to the second side edge and the pressing block respectively, and is used to drive the pressing block to move in a second direction, wherein the first direction is perpendicular to the second direction.

[0040] Optionally, the pressing block comprises a body part and a pressing part;

[0041] Two ends of the body part are connected to the output end of the fourth driving member and the pressing part respectively;

[0042] The pressing part is opposite to the bearing surface and can move close to or away from the bearing surface.

[0043] Optionally, the pressing part comprises a plurality of first sub-pressing parts and a plurality of second sub-pressing parts;

[0044] At least two of the plurality of first sub-pressing parts are oppositely arranged;

[0045] The second sub-pressing part is located between the oppositely arranged two first sub-pressing parts.

[0046] The test fixture provided by the embodiment of the present application comprises a pressing mechanism, a base and a blocking mechanism. The blocking mechanism and the pressing mechanism are installed on the base. The blocking mechanism has a bearing surface. Since at least a part of the pressing mechanism can move towards and away from the bearing surface, the workpiece to be tested can be pressed onto the bearing surface by using the pressing mechanism, so as to position the workpiece to be tested. The blocking mechanism is provided with a plurality of first passages and at least one second passage. The first end of each first passage is exposed to the bearing surface, and the second end is converged and communicated at a communication position. When the first end of the first passage is communicated with the test hole on the workpiece to be tested, the fluid can flow in the first passage and the test hole corresponding to the first passage. The first end of the second passage is communicated with the communication position, and the second end is exposed to the blocking mechanism. When the second end of the second passage is communicated with the vacuumizing device, the first passage and the second passage can be vacuumized. When the second end of the second passage is communicated with the water injection device, the water flow can flow into the second passage, the first passage and the test hole corresponding to the first passage in sequence. Since the test fixture provided by the embodiment of the present application comprises a plurality of first passages, if the first passage is communicated with the test hole one by one, the plurality of test holes on the workpiece to be tested can be simultaneously tested by using real water, without testing the test holes one by one, so as to improve the efficiency and accuracy of the real water test on the workpiece to be tested, that is, the detection efficiency of the workpiece to be tested is improved. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0048] Figure 1 is a structural schematic diagram of a test fixture provided by the embodiment of the present application;

[0049] Figure 2 is an exploded view of a test fixture provided by the embodiment of the present application;

[0050] Figure 3 is a structural schematic diagram of a test assembly in the embodiment of the present application;

[0051] Figure 4 is an exploded view of a blocking mechanism in a test fixture provided by the embodiment of the present application;

[0052] Figure 5 is a structural schematic diagram of a bearing and a sealing assembly in a test fixture provided by the embodiment of the present application;

[0053] Figure 6is a sectional view of a bearing member in a test fixture and a structure view of a second driving member provided by an embodiment of the present application;

[0054] Figure 7 is a sectional view of a test fixture when a second driving member is located at a first position provided by an embodiment of the present application;

[0055] Figure 8 is a sectional view of a test fixture when a second driving member is located at a second position provided by an embodiment of the present application;

[0056] Figure 9 is a sectional view of a bearing member in a test fixture provided by an embodiment of the present application;

[0057] Figure 10 is a top view of a plugging mechanism in a test fixture provided by an embodiment of the present application;

[0058] Figure 11 is a structure view of a pressing block in a test fixture provided by an embodiment of the present application;

[0059] Figure 12 is a structure view of a second driving member in a test fixture provided by an embodiment of the present application.

[0060] The various marks in the drawings are as follows:

[0061] 100, a pressing mechanism; 101, a support; 102, a third driving member; 103, a fourth driving member; 104, a pressing block; 105, a first side edge; 106, a second side edge; 107, a body portion; 108, a pressing portion; 109, a first sub-pressing portion; 110, a second sub-pressing portion;

[0062] 200, a base; 201, a through slot; 202, a seat body; 203, a support column;

[0063] 300, blocking mechanism; 301, bearing surface; 302, first passage; 303, second passage; 304, communication; 305, bearing assembly; 306, sealing assembly; 307, air release passage; 308, waterproof and breathable membrane; 309, fixing plate; 310, connecting plate; 311, first driving member; 312, first elastic member; 313, support rod; 314, first baffle; 315, second baffle; 316, spring; 317, third passage; 318, second driving member; 319, mounting cavity; 320, first side wall; 321, second side wall; 322, third side wall; 323, first through hole; 324, second through hole; 325, third through hole; 326, bearing member; 327, positioning member; 328, first groove; 329, first through hole; 330, through hole; 331, first sealing member; 332, second sealing member; 333, fourth through hole; 334, elastic block; 335, air release passage; 336, second groove; 337, third sealing member; 338, fourth sealing member; 339, first recess; 340, second recess; 342, fourth recess; 343, second through hole; 344, fifth through hole; 345, cavity; 346, driving part; 347, fixing part; 348, spring part; 349, elastic rod; 350, connecting part; 351, first sub-fixing part; 352, second sub-fixing part; 353, third sub-fixing part; 354, sliding groove;

[0064] 400, workpiece to be measured; 401, microphone hole; 402, balance hole.

[0065] The specific embodiments of the present application have been shown and described in the above drawings, and will be described in more detail hereinafter. These drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0066] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present application.

[0067] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as commonly understood by those skilled in the art.

[0068] In order to make the technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in further detail in combination with the drawings.

[0069] In combination withFigure 1 、 Figure 3 and Figure 4 As shown in FIGS. 1-3, the test fixture provided by the embodiments of the present application includes a pressing mechanism 100, a base 200, and a plugging mechanism 300. It should be noted that the test fixture provided by the embodiments of the present application is generally used for water test on a to-be-tested hole on a to-be-tested workpiece 400, such as a watch, a bracelet, a mobile phone, or the like. The to-be-tested workpiece 400 can be a housing component, for example. The to-be-tested hole can be a microphone hole 401 and / or a balance hole 402, for example.

[0070] The plugging mechanism 300 and the pressing mechanism 100 are installed on the base 200. At least a portion of the pressing mechanism 100 is movable towards and away from the bearing surface 301. In this way, before the to-be-tested workpiece 400 needs to be subjected to water test, the to-be-tested workpiece 400 can be pressed onto the bearing surface 301 by using the pressing mechanism 100, so as to position the to-be-tested workpiece 400.

[0071] The plugging mechanism 300 has a bearing surface 301. The plugging mechanism 300 is provided with a plurality of first passages 302 and at least one second passage 303. The first end of each first passage 302 is exposed to the bearing surface 301, and the second ends of the first passages 302 are merged and communicated with each other at a communication portion 304. When the first end of the first passage 302 is communicated with the to-be-tested hole on the to-be-tested workpiece 400, fluid can flow through the first passage 302 and the to-be-tested hole corresponding to the first passage 302.

[0072] The first end of the second passage 303 is communicated with the communication portion 304, and the second end of the second passage 303 is exposed to the plugging mechanism 300. When the second end of the second passage 303 is communicated with a water injection device, the first passage 302 and the second passage 303 can be evacuated. During the evacuation process, gas is sequentially evacuated through the first passage 302, the communication portion 304, and the second passage 303. After the evacuation process is completed, the second passage 303 can be communicated with the water injection device, so that water flow can sequentially pass through the second passage 303 and the communication portion 304, and then flow into each first passage 302 and the corresponding to-be-tested hole. It should be noted that generally during water test, the water flow does not fill the entire first passage 302, that is, the first passage 302 has a gas space. The pressure drop in the gas space can be tested by using a water test instrument, and the waterproof and air permeability of the to-be-tested workpiece 400 can be determined by the pressure drop value. For example, if the pressure drop value is greater than a preset value within a preset time, it indicates that the air tightness of the to-be-tested workpiece 400 is poor, and the to-be-tested workpiece 400 is a defective product. Otherwise, it indicates that the air tightness of the to-be-tested workpiece 400 meets the requirements.

[0073] It should be noted that the vacuumizing device, the water injecting device and the real water testing instrument can be in communication with the second ends of one-to-one second passages 303 respectively, or can be in communication with the second ends of the same second passage 303. In some embodiments, the second ends of the second passages 303 are connected with control valves, and the second passages 303 are in a conductive or disconnected state between the vacuumizing device, the water injecting device and the real water testing instrument by controlling the open and closed states of the control valves.

[0074] Since the test fixture provided by the embodiments of the present application includes a plurality of first passages 302, if the first passages 302 are in one-to-one communication with the to-be-tested holes, the real water test can be simultaneously performed on the plurality of to-be-tested holes on the to-be-tested workpiece 400, without the need to test the to-be-tested holes one by one, thereby improving the efficiency and accuracy of the real water test on the to-be-tested workpiece 400, that is, improving the detection efficiency of the to-be-tested workpiece 400.

[0075] The following will be described in detail with reference to the accompanying drawings. Figures 1 to 12 The various component structures and functions of the test fixture provided by the embodiments of the present application will be described in more detail.

[0076] Combined with the accompanying drawings, the following will be described in detail. Figure 2 And Figure 4 As shown in FIG. 1, in some embodiments, the base 200 is provided with a through slot 201. The plugging mechanism 300 is located in the through slot 201, and the plugging mechanism 300 includes a bearing assembly 305 and a sealing assembly 306, and the bearing assembly 305 and the sealing assembly 306 are relatively combined in the through direction of the through slot 201.

[0077] The bearing assembly 305 has a bearing surface 301, and the bearing assembly 305 is provided with a plurality of air release passages 307, first passages 302 and second passages 303. The first ends of the air release passages 307 penetrate the surface of the bearing assembly 305, and the second ends are opposite to the corresponding first passages 302. It should be noted that the first ends of the air release passages 307 are covered with a waterproof and breathable film 308. It should be noted that the waterproof and breathable film 308 can be connected with the surface of the bearing assembly 305 by bonding or the like and cover the first ends of the air release passages 307. It should be understood that due to the waterproof and breathable film 308, the first ends of the air release passages 307 only allow gas to pass through but not water flow.

[0078] The sealing assembly 306 is located on the side of the bearing assembly 305 away from the bearing surface 301, and the sealing assembly 306 can move close to and away from the bearing assembly 305 to seal and open the second ends of the air release passages 307. Combined with Figure 3As shown, the first passage 302 is generally connected to the corresponding microphone hole 401 on the workpiece 400 under test. The end of the microphone hole 401 facing away from the bearing surface 301 is usually covered by the microphone device housing and is in a blocked state. That is, only the end of the microphone hole 401 facing the bearing surface 301 is open. Before vacuuming, the second end of the vent passage 307 needs to be sealed with the sealing component 306 to prevent external gas from continuously entering the first passage 302 and the second passage 303 during vacuuming, so as to ensure that the gas in the first passage 302 and the second passage 303 can be extracted to reach the preset gas pressure value. After vacuuming, the sealing component 306 needs to be moved away from the bearing component 305 to open the second end of the vent passage 307, so as to connect the first passage 302 with the outside air of the test fixture. Thus, when the second passage 303 is connected to the water injection device, water can flow smoothly into the first passage 302 and the corresponding microphone hole 401 to ensure that the real water test can be completed.

[0079] like Figure 4 As shown, in some embodiments, the sealing assembly 306 includes a fixing plate 309, a connecting plate 310, a first driving member 311, and a plurality of first elastic members 312. The fixing plate 309 is connected to the base 200 and is disposed opposite to the through groove 201. It should be noted that the fixing plate 309 can be fixed to the base 200 by bolts or other fasteners.

[0080] The first driving member 311 has two ends connected to the fixed plate 309 and the connecting plate 310, respectively. The first driving member 311 can drive the connecting plate 310 to move in a direction perpendicular to the fixed plate 309. It should be noted that the first driving member 311 can be a cylinder. The fixed end of the first driving member 311 is fixed to the fixed plate 309, and the retractable output end of the first driving member 311 is fixedly connected to the connecting plate 310. In this way, when the output end of the first driving member 311 moves, it can drive the connecting plate 310 to move synchronously.

[0081] One end of the first elastic member 312 is connected to the connecting plate 310, and the other end extends toward the first end of the vent passage 307. The first elastic member 312 moves synchronously with the connecting plate 310. Thus, the first elastic member 312 can move with the output end of the first driving member 311 under the drive of the connecting plate 310, and the end of the first elastic member 312 can seal or open the second end of the vent passage 307.

[0082] like Figure 5As shown, in some embodiments, one end of the first elastic member 312 close to the bearing assembly 305 is connected with an elastic block 334. The diameter of the elastic block 334 can be greater than the port diameter of the second end of the air leakage passage 307. The elastic block 334 can be made of a material with elasticity, such as rubber. In this way, when the elastic block 334 is in contact with the surface of the bearing assembly 305, a good seal can be ensured for the second end of the air leakage passage 307 to prevent gas from flowing through.

[0083] As shown, Figure 5 in some embodiments, the first elastic member 312 includes a support rod 313, a first baffle 314, a second baffle 315, and a spring 316. The first end of the support rod 313 passes through the first baffle 314 and the second baffle 315 in turn, and the second end extends towards the first end of the air leakage passage 307. The two ends of the spring 316 are respectively in contact with the first baffle 314 and the side of the connecting plate 310 away from the fixed plate 309. The second baffle 315 is in contact with the side of the connecting plate 310 facing the fixed plate 309. It should be noted that when the connecting plate 310 moves, the first elastic member 312 moves synchronously with the connecting plate 310, and the first baffle 314 and the spring 316 cooperate to position the support rod 313 to prevent the support rod 313 from being separated from the connecting plate 310 due to gravity.

[0084] In combination with Figure 3 , Figure 4 and Figure 6In some embodiments, the bearing assembly 305 is further provided with a third passage 317, the first end of the third passage 317 is exposed on the bearing surface 301, and the second end is communicated with the communication port 304. The sealing mechanism 300 further comprises a second driving member 318, which is installed in the bearing assembly 305, and the output end of the second driving member 318 is used to open or block the first end and the second end of the third passage 317. It should be noted that the third passage 317 is generally communicated with the balance hole 402 on the workpiece 400 to be tested, and both ends of the balance hole 402 are generally in an open state. It should be understood that the balance hole 402 provided on the workpiece 400 to be tested is used to communicate the inside and outside of the electronic device, and plays a role in timely pressure relief. Before vacuumizing the workpiece 400 to be tested, the second end of the gas exhaust passage 307 is sealed by using the first elastic member 312. Then, the output end of the second driving member 318 is used to block the first end and the second end of the third passage 317, at this time, the gas cannot flow from the first end to the second end of the third passage 317. In this way, it can be ensured that the space formed by the first passage 302 and the second passage 303 is a sealed space, and external gas cannot enter the first passage 302 and the second passage 303 from the microphone hole 401 or the balance hole 402, so as to ensure that the subsequent vacuumizing process can be realized. When the water injection device starts to inject water into the second passage 303, the first driving member 311 drives the first elastic member 312 to move away from the second end of the gas exhaust passage 307, so as to make the gas exhaust passage 307 communicated with the external atmosphere. At the same time, the output end of the second driving member 318 can open the first end and the second end of the third passage 317, so that the balance hole 402 is also communicated with the external atmosphere. With the inflow of water flow, the gas remaining in the first passage 302 and the third passage 317 can be discharged from the gas exhaust passage 307 or the balance hole 402 in time, so that the water flow can flow smoothly to the microphone hole 401 and the balance hole 402. When the amount of water injection reaches a certain value, the second passage 303 can be connected with the true water tester, and after the true water tester is started, the leakage value of all test holes of the workpiece 400 to be tested can be obtained by measuring the pressure drop in the first passage 302 and the third passage 317, so as to reflect whether the air tightness of the workpiece 400 to be tested is good. Since the balance hole 402 and the plurality of microphone holes 401 can be integrated for true water testing, the testing efficiency of the air tightness of the workpiece 400 to be tested can be improved, the unqualified workpiece 400 to be tested can be intercepted in time and effectively, the testing accuracy can be improved, and thus the labor and detection equipment can be reduced, the production cost can be reduced, and the production efficiency can be improved.

[0085] In combination Figure 6 , Figure 7 and Figure 8As shown, in some embodiments, the bearing assembly 305 has a mounting cavity 319, which includes a first side wall 320, a second side wall 321 and a third side wall 322 connected in sequence, and the first side wall 320 and the third side wall 322 are oppositely arranged. The second side wall 321 is provided with a first through hole 323, which is in communication with the first end of the third passage 317. The first side wall 320 and the third side wall 322 are respectively provided with a second through hole 324 and a third through hole 325, and the third through hole 325 is in communication with the second end of the third passage 317. The output end of the second driving member 318 penetrates into the mounting cavity 319 through the second through hole 324 and can move along the axial direction of the second through hole 324.

[0086] Wherein, when the output end of the second driving member 318 moves to the first position, the third through hole 325 is blocked, at this time, the first end and the second end of the third passage 317 are blocked, so as to ensure the realization of the vacuumizing process. When the output end of the second driving member 318 moves to the second position, the third through hole 325 is opened, so that the first through hole 323 and the third through hole 325 are in communication. At this time, when water injection is carried out, the water flow can smoothly flow from the second end of the third passage 317 to the first end of the third passage 317, so as to ensure that the water test experiment can be completed.

[0087] In combination Figure 6 and Figure 12As shown, in some embodiments, the second driving member is disposed within a cavity 345 within the carrier member. The second driving member includes a driving part 346, a fixing part 347, a spring part 348, an elastic rod 349, and a connecting part 350. The fixing part 347 includes a first sub-fixing part 351, a second sub-fixing part 352, and a third sub-fixing part 353 connected together. The first sub-fixing part 351 and the third sub-fixing part 353 are disposed opposite to each other, and the output end of the driving part 346 is slidably connected to the second sub-fixing part 352. For example, a groove 354 can be formed on the second sub-fixing part 352, and the driving part 346 can be, for example, a cylinder. The output end of the driving part 346 can move within the groove 354. The first sub-fixing part 351 and the second sub-fixing part 352 are provided with opposing first mounting holes (not shown in the figure) and second mounting holes (not shown in the figure). The two ends of the elastic rod 349 are located in the first mounting hole and the second mounting hole, respectively. A spring portion 348 is sleeved on an elastic rod 349. One end of the spring portion 348 abuts against the side of the first sub-fixed portion 351 facing the second sub-fixed portion 352, and the other end abuts against the side of the second sub-fixed portion 352 facing the first sub-fixed portion 351. The two ends of the connecting portion 350 are respectively connected to the output end of the driving portion 346 and the end of the elastic portion near the first mounting hole. It should be noted that the shape of the first mounting hole matches the shape of the elastic portion and the connecting portion 350, allowing the elastic portion and the connecting portion 350 to move within the first mounting hole. It can be understood that the output end of the driving portion 346 can sequentially drive the connecting portion 350 and the elastic rod 349 to move. When the output end of the driving portion 346 moves along the direction from the second through hole to the third through hole, the spring portion 348 is compressed, and the end of the elastic rod 349 blocks the third through hole. When the output end of the drive unit 346 moves along the direction from the third through hole to the second through hole, the spring unit 348 gradually returns from the compressed state to its original state, and the end of the elastic rod 349 blocks the second through hole. Because the elastic part has elastic restoring force, it can push the elastic rod 349 to move quickly to the position of blocking the second through hole, thus improving the flexibility of the movement of the elastic rod 349.

[0088] like Figure 9 As shown, in some embodiments, the distance from the first end of each first passage 302 to the connection point 304 is equal. This ensures the smooth flow of the vacuum gas and also ensures that when water is injected, the water flow can be uniform and smooth into each first passage 302.

[0089] Combination Figure 6 and Figure 9As shown, in some embodiments, the distance from the first end of the third passage 317 to the connection point 304 is equal to the distance from the first end of each first passage 302 to the connection point 304. This ensures the smoothness of the vacuum gas flow and also ensures that when water is injected, the water flow can be uniform and smooth to each first passage 302 and the third passage 317, thereby improving the accuracy of the test results.

[0090] like Figure 10 As shown, in some embodiments, the support assembly 305 includes a support member 326 and a plurality of positioning members 327. The support member 326 has a support surface 301. The plurality of positioning members 327 are mounted on the support surface 301, and at least two of the positioning members 327 are arranged diagonally. It should be noted that by setting the positioning members 327, the workpiece 400 to be measured can be accurately and efficiently positioned. The inner side of the positioning member 327 is used to hold the corresponding side of the workpiece 400 to be measured.

[0091] like Figure 10 As shown, in some embodiments, the support member 326 is provided with an exhaust passage 335, one end of which is exposed at the center of the support surface 301, and the other end is exposed on the side wall of the support member 326. With this configuration, when the pressing mechanism 100 presses the workpiece 400 to be tested against the support surface 301, the gas between the support surface 301 and the workpiece 400 can be discharged from the exhaust passage 335 in a timely manner, preventing gas residue between the support surface 301 and the workpiece 400, thus preventing deformation of the workpiece 400. This ensures that the workpiece 400 is not damaged and also ensures the accuracy of the true water test.

[0092] like Figure 10 As shown, in some embodiments, the positioning element 327 is L-shaped. It should be noted that the workpiece 400 under test generally has multiple corners, for example, four corners as shown in the attached figure. The L-shaped positioning element 327 corresponds to each corner on the workpiece 400 under test, thereby enabling the positioning element 327 to position the workpiece 400 under test more stably, and also making it easier for the workpiece 400 under test to be placed in a preset position on the bearing surface 301.

[0093] like Figure 9As shown in some embodiments, the surface of the carrier 326 away from the carrier surface 301 is provided with a plurality of first grooves 328, each of which converges and communicates at the communication portion 304, and the carrier 326 is further provided with a plurality of first through holes 329, the first end of each of which communicates with the bottom of the corresponding first groove 328, and the second end is exposed to the carrier surface 301, and generally the second end of each of the first through holes 329 communicates with the corresponding microphone hole 401, wherein the first groove 328 and the corresponding first through hole 329 constitute the first passage 302. The carrier assembly 305 further comprises a through member 330, the through member 330 is provided with a second passage 303, and the through member 330 covers the opening of the first groove 328. Thus, the through member 330 can seal the opening of the first groove 328, and ensure that the first passage 302 can be in a sealed state.

[0094] As shown in some embodiments, Figure 6 the surface of the carrier 326 away from the carrier surface 301 is provided with a second groove 336, which converges and communicates with each first groove 328 at the communication portion 304. The carrier 326 is further provided with a second through hole 343, the first end of which communicates with the mounting cavity 319 and the second groove 336 in turn, and the second end communicates with the corresponding balance hole 402. When the second groove 336 communicates with the second through hole 343, it constitutes the third passage 317.

[0095] As shown in some embodiments, Figure 4 and Figure 9 in some embodiments, the carrier assembly 305 further comprises a first sealing member 331, one side of which is connected to the side of the through member 330 facing the carrier 326, and the other side covers the opening of the first groove 328. It should be noted that the first sealing member 331 can be made of elastic materials such as rubber, so as to ensure that the opening of the first groove 328 can be sealed.

[0096] As shown in some embodiments, Figure 4 , Figure 6 and Figure 9 in some embodiments, one side of the first sealing member 331 is connected to the side of the through member 330 facing the carrier 326, and the other side covers the opening of the first groove 328 and the opening of the second groove 336. Thus, it is ensured that the first passage 302 and the third passage 317 can be in a sealed state.

[0097] As shown in some embodiments, Figure 10As shown, in some embodiments, the carrier assembly 305 further includes a plurality of second seals 332 located on the carrier surface 301. Each second seal 332 has a fourth through hole 333 communicating with the first passage 302. Generally, the two ends of the fourth through hole 333 are respectively opposite to and communicate with the corresponding microphone hole 401 and the corresponding first passage 302. It should be understood that the second seals 332 can prevent fluid from flowing out from the gap between the carrier surface 301 and the workpiece 400 under test, thereby improving the accuracy of the true water test results.

[0098] like Figure 10 As shown, in some embodiments, the carrier assembly 305 further includes at least one third seal 337, which has the same structure as the second seal 332. The third seal 337 is located on the carrier surface 301, and its two sides abut against the carrier surface 301 and the surfaces of the workpiece 400 facing the carrier surface 301, respectively. It should be noted that the third seal 337 is used to ensure that the workpiece 400 is in a horizontal position. (Combined with...) Figure 3 As shown, when each of the three corner positions of the workpiece 400 under test is provided with a microphone hole 401, the third seal 337 can correspond to a corner of the workpiece 400 under test that does not have a microphone hole 401. This ensures that each corner of the workpiece 400 under test is on the same horizontal plane, thus ensuring that the workpiece 400 under test can be smoothly prevented from moving.

[0099] like Figure 10 As shown, in some embodiments, the carrier assembly 305 further includes at least one fourth seal 338 located on the carrier surface 301. The fourth seal 338 has a fifth through hole 344, which communicates with the third through hole 317. Generally, the two ends of the fifth through hole 344 are respectively opposite to and communicate with the corresponding balance hole 402 and the third through hole 317. It should be understood that the fourth seal 338 can prevent fluid from flowing out from the gap between the carrier surface 301 and the workpiece 400 under test, thereby improving the accuracy of the true water test results.

[0100] Combination Figure 9 and Figure 10 As shown, in some embodiments, the bearing surface 301 is provided with a plurality of first recesses 339, at least a portion of the second seal 332 is located within the first recesses 339, and the first end of the first passage 302 is exposed in the first recesses 339. It should be noted that the first recesses 339 can serve to position the first seal 331.

[0101] Combination Figure 6 and Figure 10As shown in the drawings, in some embodiments, the bearing surface 301 is provided with at least one second recess 340, at least a portion of the fourth seal 338 is located in the second recess 340, and the first end of the third passage 317 is exposed from the second recess 340. It should be noted that the second recess 340 can serve to position the fourth seal 338.

[0102] In some embodiments, the bearing surface 301 is provided with at least one third recess, and at least a portion of the third seal 337 is located in the third recess (not shown in the drawings). It can be understood that the third recess can serve to position the third seal 337.

[0103] In combination with Figure 9 and Figure 10 As shown in the drawings, in some embodiments, the bearing surface 301 is provided with a plurality of fourth recesses 342, the fourth recesses 342 are used to accommodate corresponding positioning members 327, thereby serving to position the positioning members 327 and facilitating assembly of the positioning members 327. It should be noted that the positioning members 327 can be fixed together with the fourth recesses 342 by means of bolts or other fixing members.

[0104] In combination with Figure 1 and Figure 2 As shown in the drawings, in some embodiments, the pressing mechanism 100 includes a bracket 101, a third driving member 102, a fourth driving member 103, and a pressing block 104. The bracket 101 includes adjacent first and second side edges 105 and 106. The third driving member 102 is connected to the first side edge 105 and the base 200, respectively, and is used to drive the bracket 101 to move in a first direction. The fourth driving member 103 is connected to the second side edge 106 and the pressing block 104, respectively, and is used to drive the pressing block 104 to move in a second direction, wherein the first direction is perpendicular to the second direction. It should be noted that the third and fourth driving members 102 and 103 can be air cylinders, respectively. The pressing block 104 is used to provide pressure to the workpiece 400 to be measured, so that the workpiece 400 to be measured can be more stably pressed onto the bearing surface 301.

[0105] As shown in the drawings, in some embodiments, the bearing surface 301 is provided with at least one second recess 340, at least a portion of the fourth seal 338 is located in the second recess 340, and the first end of the third passage 317 is exposed from the second recess 340. It should be noted that the second recess 340 can serve to position the fourth seal 338. Figure 2As shown in the drawings, in some embodiments, the base 200 comprises a seat body 202 and a plurality of support columns 203. One end of the support columns 203 is connected with the seat body 202, and the other end extends away from the seat body 202. The base 200 is provided with a through slot 201. The fixed end of the third driving member 102 is connected with the side of the seat body 202 away from the support columns 203, and the output end is connected with the first side edge 105. The output end of the third driving member 102 drives the first side edge 105 to move in the first direction, thereby driving the bracket 101 to move in the first direction. The moving bracket 101 can drive the fourth driving member 103 connected with the second side edge 106 of the bracket 101 to move in the first direction, and the pressing block 104 can move in the first direction along with the fourth driving member 103. Since the fixed end of the fourth driving member 103 is connected with the second side edge 106, and the output end is connected with the pressing block 104, when the output end of the fourth driving member 103 moves, the pressing block 104 can be driven to move in the second direction. The first direction is parallel to the seat body 202, and the second direction is perpendicular to the seat body 202. In this way, the position of the pressing block 104 can be adjusted more flexibly, so that the pressing block 104 can be aligned with the workpiece 400 to be tested on the bearing surface 301 and press the workpiece 400 to be tested.

[0106] As shown in the drawings, Figure 2 In some embodiments, the pressing block 104 comprises a body part 107 and a pressing part 108. The two ends of the body part 107 are respectively connected with the output end of the fourth driving member 103 and the pressing part 108. The pressing part 108 is opposite to the bearing surface 301 and can move close to or away from the bearing surface 301. It should be noted that the body part 107 is fixedly connected with the output end of the fourth driving member 103, so that when the output shafts of the third driving member 102 and the fourth driving member 103 move respectively, the body part 107 can also move in the first direction and the second direction to the specified position, so that the pressing part 108 connected with the body part 107 can press the workpiece 400 to be tested.

[0107] As shown in the drawings, Figure 11 In some embodiments, the pressing part 108 comprises a plurality of first sub-pressing parts 109 and a plurality of second sub-pressing parts 110. At least two of the plurality of first sub-pressing parts 109 are oppositely arranged. The second sub-pressing part 110 is located between the oppositely arranged two first sub-pressing parts 109. It should be noted that the first sub-pressing part 109 is generally opposite to the side edge of the workpiece 400 to be tested. The second sub-pressing part 110 is generally opposite to the surface inside the side edge of the workpiece 400 to be tested. Therefore, when the first sub-pressing part 109 presses the side edge of the workpiece 400 to be tested and the second sub-pressing part 110 presses the surface of the workpiece 400 to be tested, the side of the workpiece 400 to be tested can be prevented from being raised, and the workpiece 400 to be tested can be stably pressed on the bearing surface 301.

[0108] In summary, the test jig provided by the embodiments of the present application can realize integrated true water test on the multiple microphone holes 401 and / or balance holes 402 on the workpiece 400 to be tested, without testing each microphone hole or balance hole one by one, thereby improving the efficiency and accuracy of the true water test on the workpiece 400 to be tested, that is, improving the detection efficiency of the workpiece 400 to be tested.

[0109] In the present application, the terms "first" and "second" are only for descriptive purposes and cannot be understood or implied to indicate or suggest relative importance. The term "multiple" refers to two or more, unless otherwise explicitly limited.

[0110] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The present application is intended to cover any variations, uses or adaptive changes of this application following the general principles thereof and including those expressly stated or implied in this specification. The specification and examples are to be regarded as illustrative only.

[0111] It should be understood that the present application is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the application is limited only by the claims that follow.

Claims

1. A test fixture, comprising: The test fixture comprises a pressing mechanism (100), a base (200) and a sealing mechanism (300); The sealing mechanism (300) and the pressing mechanism (100) are mounted on the base (200); The sealing mechanism (300) has a bearing surface (301), and a plurality of first passages (302) and at least one second passage (303) are arranged in the sealing mechanism (300); the first end of each first passage (302) is exposed to the bearing surface (301), and the second ends of the first passages (302) are converged and communicated at a communication portion (304); the first end of the second passage (303) is communicated with the communication portion (304), and the second end of the second passage (303) is exposed to the sealing mechanism (300); At least a part of the pressing mechanism (100) is movable towards and away from the bearing surface (301).

2. The test fixture of claim 1, wherein, The base (200) is provided with a through slot (201); The sealing mechanism (300) is located in the through slot (201), and the sealing mechanism (300) comprises a bearing assembly (305) and a sealing assembly (306); the bearing assembly (305) and the sealing assembly (306) are relatively combined in the through direction of the through slot (201); The bearing assembly (305) has the bearing surface (301), and is provided with a plurality of air release passages (307), the first passages (302) and the second passage (303); the first end of the air release passage (307) penetrates the surface of the bearing assembly (305), and the second end of the air release passage (307) is opposite to the corresponding first passage (302); wherein the first end of the air release passage (307) is covered with a waterproof and breathable film (308); The sealing assembly (306) is located on the side of the bearing assembly (305) away from the bearing surface (301); wherein the sealing assembly (306) is movable relative to the bearing assembly (305) to seal and open the second end of the air release passage (307).

3. The test fixture of claim 2, wherein, The sealing assembly (306) comprises a fixed plate (309), a connecting plate (310), a first driving member (311) and a plurality of first elastic members (312); The fixed plate (309) is connected with the base (200) and is arranged opposite to the through slot (201); The two ends of the first driving member (311) are connected with the fixed plate (309) and the connecting plate (310) respectively, and the first driving member (311) can drive the connecting plate (310) to move in the direction perpendicular to the fixed plate (309); One end of the first elastic member (312) is connected with the connecting plate (310), and the other end extends towards the first end of the air release passage (307); the first elastic member (312) moves synchronously with the connecting plate (310).

4. The test fixture of claim 3, wherein, The first elastic member (312) comprises a support rod (313), a first baffle (314), a second baffle (315) and a spring (316); The first end of the support rod (313) passes through the first baffle (314) and the second baffle (315) in sequence, and the second end extends towards the first end of the air release passage (307); The two ends of the spring (316) are respectively in abutment with the first baffle (314) and the side of the connecting plate (310) away from the fixed plate (309); The second baffle (315) is in abutment with the side of the connecting plate (310) facing the fixed plate (309).

5. The test fixture of claim 2, wherein, The bearing assembly (305) is further provided with a third passage (317), the first end of the third passage (317) being exposed on the bearing surface (301), and the second end being in communication with the communication port (304); The sealing mechanism (300) further comprises a second driving member (318), the second driving member (318) being installed in the bearing assembly (305), and the output end of the second driving member (318) being used for opening or blocking the first end and the second end of the third passage (317).

6. The test fixture of claim 5, wherein, The bearing assembly (305) has a mounting cavity (319), the mounting cavity (319) comprising a first side wall (320), a second side wall (321) and a third side wall (322) connected in sequence, and the first side wall (320) and the third side wall (322) being oppositely arranged; The second side wall (321) is provided with a first through hole (323), the first through hole (323) being in communication with the first end of the third passage (317); The first side wall (320) and the third side wall (322) are respectively provided with a second through hole (324) and a third through hole (325), the third through hole (325) being in communication with the second end of the third passage (317), and the output end of the second driving member (318) penetrating into the mounting cavity (319) through the second through hole (324) and being movable along the axial direction of the second through hole (324); Wherein, when the output end of the second driving member (318) moves to a first position, the third through hole (325) is sealed; when the output end of the second driving member (318) moves to a second position, the third through hole (325) is opened, so that the first through hole (323) and the third through hole (325) are in communication.

7. The test fixture of claim 1, wherein, The distance from the first end of each first passage (302) to the communication port (304) is equal.

8. The test fixture of claim 6, wherein, The distance from the first end of the third passage (317) to the communication port (304) is equal to the distance from the first end of each first passage (302) to the communication port (304).

9. The test fixture of claim 2, wherein, The bearing assembly (305) comprises a bearing member (326) and a plurality of positioning members (327); The bearing member (326) has the bearing surface (301); The plurality of positioning members (327) are installed on the bearing surface (301), and at least two of the plurality of positioning members (327) are oppositely arranged.

10. The test fixture of claim 9, wherein, The surface of the carrier (326) away from the bearing surface (301) is provided with a plurality of first grooves (328), each of the first grooves (328) converges and communicates at the communication (304), and the carrier (326) is further provided with a plurality of first through holes (329), the first end of the first through hole (329) communicates with the groove bottom of the corresponding first groove (328), and the second end is exposed on the bearing surface (301), wherein the first groove (328) and the corresponding first through hole (329) constitute the first passage (302); The bearing assembly (305) further comprises a through member (330), and the through member (330) is provided with the second passage (303).

11. The test fixture of claim 10, wherein, The bearing assembly (305) further comprises a first sealing member (331), one side of the first sealing member (331) is connected with the side of the through member (330) facing the carrier (326), and the other side covers the opening of the first groove (328).

12. The test fixture of claim 9, wherein, The bearing assembly (305) further comprises a plurality of second sealing members (332), which are located on the bearing surface (301), and the second sealing member (332) has a fourth through hole (333) which communicates with the corresponding first passage (302).

13. The test fixture of claim 1, wherein, The pressing mechanism (100) comprises a support (101), a third driving member (102), a fourth driving member (103) and a pressing block (104); The support (101) comprises adjacent first and second side edges (105) and (106); The third driving member (102) is connected with the first side edge (105) and the base (200) respectively, and the third driving member (102) is used for driving the support (101) to move in a first direction; The fourth driving member (103) is connected with the second side edge (106) and the pressing block (104) respectively, and the fourth driving member (103) is used for driving the pressing block (104) to move in a second direction, wherein the first direction is perpendicular to the second direction.

14. The test fixture of claim 13, wherein, The pressing block (104) comprises a body portion (107) and a pressing portion (108); Both ends of the body portion (107) are connected with the output end of the fourth driving member (103) and the pressing portion (108) respectively; The pressing portion (108) is opposite to the bearing surface (301) and can move close to or away from the bearing surface (301).

15. The test fixture of claim 14, wherein, The pressing portion (108) comprises a plurality of first sub-pressing portions (109) and a plurality of second sub-pressing portions (110); At least two of the plurality of first sub-pressing portions (109) are oppositely arranged; The second sub-pressing portion (110) is located between the oppositely arranged two first sub-pressing portions (109).

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