Test fixture, test device, and test method

Abstract

The application provides a test fixture, a test device and a test method, and relates to the technical field of terminal equipment testing. The application is used to solve the problem that the uneven quality distribution of a terminal equipment prototype makes the posture uncontrollable in a falling process, and causes poor reliability of falling test results. The test fixture comprises a main plate, a back cover and a plurality of first counterweights. The main plate has a first surface and a second surface distributed along the thickness direction. The first surface is provided with a first groove. The first groove is covered by the back cover which is stacked on the first surface, so as to form a battery compartment together with the back cover for accommodating a battery to be tested. The back cover is detachably connected with the main plate. The second surface is provided with a plurality of spaced-apart counterweight holes. The plurality of first counterweights can be installed in at least part of the counterweight holes, and the first counterweights are detachably connected with the counterweight holes.

Description

Technical Field

[0001] This application relates to the field of terminal equipment testing technology, and in particular to a test fixture, test apparatus and test method. Background Technology

[0002] Mobile devices such as smartphones inevitably experience drops during daily use. These drops can easily collide with sharp objects (such as pebbles on the ground, or the edges of buildings and furniture), potentially causing battery deformation and leading to safety issues such as short circuits, overheating, bulging, or even fire and explosion. Therefore, drop tests are necessary using actual mobile device samples (hereinafter referred to as prototypes) to evaluate the battery safety in drop scenarios. However, due to the uneven mass distribution of prototypes and the uncontrollable attitude during drops, the impact point often deviates from the test location on the prototype, resulting in unreliable test results. Summary of the Invention

[0003] This application provides a test fixture, a test device, and a test method to address the problem that uneven mass distribution of the prototype of the terminal device leads to uncontrollable posture during the drop process, resulting in poor reliability of drop test results.

[0004] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0005] In a first aspect, a test fixture is provided for performing safety tests on the batteries of mobile terminals. The test fixture includes a main body plate, a back cover, and a plurality of first counterweights. The main body plate has a first surface and a second surface distributed along its thickness direction. A first groove is provided on the first surface, and the first groove is covered by the back cover stacked on the first surface, thereby forming a battery compartment for accommodating the battery under test together with the back cover. The back cover is detachably connected to the main body plate. A plurality of counterweight holes are provided on the second surface, and the plurality of first counterweights can be installed in at least some of the counterweight holes. The first counterweights are detachably connected to the counterweight holes.

[0006] The test jig provided by the first aspect of the application uses the test jig to simulate a mobile terminal to replace a sample machine to perform drop testing, wherein the main plate and the back cover of the test jig simulate the main body and the battery cover of the mobile terminal respectively, and the cavity surrounded by the first recess on the main plate and the back cover simulates the battery compartment of the mobile terminal. When performing drop testing, the weight and the gravity center position of the overall structure composed of the test jig and the battery can be changed by adjusting the number and the distribution position of the first counterweight members on the test jig. On the one hand, the total weight of the test jig and the battery is the same as the weight of the mobile terminal, the kinetic energy in the drop process of the mobile terminal can be restored, and then the impact force acting on the battery during drop impact can be restored. On the other hand, the gravity center position of the overall structure is as close as possible to the geometric center of the test jig, that is, the distance between the gravity center and the geometric center is reduced, the force arm of the moment generated by gravity is reduced, and thus the gravity moment is reduced or even eliminated, the possibility of turning and tilting of the test jig during drop is reduced, the controllability of the posture of the test jig during drop is improved, and thus the risk of deviation of the drop impact position from the to-be-tested position is reduced, and the reliability of the test result is improved.

[0007] In addition, the test jig is used to replace the sample machine of the mobile terminal to perform drop testing, which can effectively reduce the test cost. When using the sample machine to perform drop testing, the reuse times of the sample machine are very limited, and even the sample machine is scrapped after being used once in some drop testing, and the test cost is high. The test jig can be repeatedly used in multiple testing processes, and the scrap period is long, which greatly reduces the use cost.

[0008] In a possible implementation manner of the first aspect of the application, the plurality of counterweight holes include a plurality of first counterweight holes and a plurality of second counterweight holes, the first counterweight holes are located within the coverage range of the vertical projection of the groove bottom surface of the first recess on the second surface, and the second counterweight holes are located outside the coverage range of the vertical projection of the groove bottom surface of the first recess on the second surface.

[0009] In a possible implementation manner of the first aspect of the application, the first counterweight hole is a blind hole. In this way, the first counterweight hole does not penetrate the main plate, so that the first counterweight hole does not form a hole on the groove bottom surface of the first recess, and the first counterweight hole and the first counterweight member matched with the first counterweight hole can avoid adversely affecting the battery in the first recess.

[0010] In a possible implementation of the first aspect of the present application, the second counterweight hole penetrates the main body plate in the thickness direction of the main body plate, the plurality of first connecting holes on the back cover penetrate the back cover in the first direction, and the plurality of first connecting holes and the plurality of second counterweight holes are one-to-one correspondence and in communication; wherein at least part of the first counterweight members are arranged in the second counterweight hole and the first connecting hole in communication with each other, and the first counterweight member connects the back cover and the main body plate. In this way, part of the first counterweight member can play a counterweight role at the same time, and also play a connecting role between the back cover and the main body plate, so that the same structure can realize different functions, and the overall structure of the test fixture can be simplified.

[0011] In a possible implementation of the first aspect of the present application, the plurality of second connecting holes on the back cover penetrate the back cover in the first direction, the plurality of third connecting holes on the first surface are distributed in the first recess, and the plurality of third connecting holes and the plurality of second connecting holes are one-to-one correspondence and in communication; wherein the test fixture further comprises a plurality of connecting members, the plurality of connecting members are arranged in the second connecting hole and the third connecting hole in communication with each other, and the back cover and the main body plate are fixedly connected through the connecting member. In this way, the second connecting hole and the third connecting hole can cooperate with the connecting member to form a connecting structure, providing another connecting method for the connection between the back cover and the main body plate. This connecting method can meet the connection requirements of the back cover and the main body plate in some cases.

[0012] In a possible implementation of the first aspect of the present application, the third connecting hole penetrates the main body plate in the first direction, and for the first end of the connecting member fitted in the third connecting hole, in the first direction, the distance between the first end and the first surface is less than or equal to the distance between the first surface and the second surface. In this way, the first end is completely accommodated in the third connecting hole without protruding from the second surface, which can avoid affecting the first counterweight member and other components on the second surface.

[0013] In a possible implementation of the first aspect of the present application, the counterweight hole and the first counterweight member are threadedly connected, that is, the counterweight hole is a threaded hole, and the first counterweight member is provided with external threads. In this way, through simple thread connection, the detachable connection of the counterweight hole and the first counterweight member can be realized, and the disassembly is convenient.

[0014] In a possible implementation of the first aspect of the present application, the plurality of first counterweight members have different masses. In this way, by selecting first counterweight members with different masses and adjusting the distribution position of the first counterweight members, the weight and mass distribution of the test fixture can be more accurately adjusted.

[0015] In one possible implementation of the first aspect of this application, the test fixture further includes at least one second counterweight. The second counterweight is stacked on the second surface along a first direction, and the second counterweight has a plurality of fourth connecting holes that penetrate through it along the first direction. The plurality of fourth connecting holes and the plurality of counterweight holes are correspondingly arranged and connected. A first counterweight is disposed in the interconnected fourth connecting holes and counterweight holes, and the first counterweight connects the second counterweight to the main body plate. In this way, the second counterweight increases the overall weight of the test fixture and, together with the first counterweight, achieves the counterweight function of the test fixture.

[0016] In one possible implementation of the first aspect of this application, the projection of the second counterweight onto the plane containing the main body plate coincides with that onto the first surface. In this way, after the second counterweight is fixed to the main body plate, it will not affect the mass distribution of the main body plate or even the test fixture, thus not affecting the adjustment of the center of gravity of the test fixture by the first counterweight.

[0017] In one possible implementation of the first aspect of this application, a second groove is further provided on the first surface. The second groove and the first groove are distributed at intervals along the length of the main body plate, and some of the counterweight holes are located within the coverage area of ​​the vertical projection of the bottom surface of the second groove on the second surface. In this way, the second groove can reduce the weight of the main body, making the weight of the main body plate significantly less than the weight of the mobile terminal, providing adjustment space for subsequent counterweight adjustments.

[0018] In one possible implementation of the first aspect of this application, a stop block and an adjusting member are provided in the first groove. One end of the adjusting member is connected to the stop block, and the other end is connected to the groove wall of the first groove. The adjusting member is used to move the stop block in a direction parallel to the first surface, so that the battery abuts against the stop block and the groove wall of the first groove. In this way, batteries of different sizes can be positioned after being placed in the first groove, ensuring the stability of the battery in the first groove, thereby ensuring the effectiveness of the drop test.

[0019] In one possible implementation of the first aspect of this application, the adjusting element is a spring. This utilizes the spring's ability to extend and retract to meet the movement requirements of the stop block, and the spring can also apply pressure to the stop block, causing it to press firmly against the battery and enhancing its positioning effect.

[0020] In one possible implementation of the first aspect of this application, the adjusting member is a threaded fastener, and an adjusting screw hole is provided on the groove wall, with the adjusting member threadedly engaging with the adjusting screw hole. In this way, while meeting the movement requirements of the stop block, the rigid structure of the threaded fastener enhances the stability of the stop block against the battery.

[0021] In a possible implementation of the first aspect of the present application, the adjusting member is rotationally connected with the stopper. In this way, for a stopper with a large size, the stopper does not rotate with the adjusting member, and interference between the stopper and the first groove can be avoided.

[0022] In a possible implementation of the first aspect of the present application, the adjusting member is fixedly connected with the stopper. In this way, for a stopper with a small size, the stopper can rotate with the adjusting member and does not interfere with the first groove, and the connection structure of the stopper and the adjusting member is simpler.

[0023] In a possible implementation of the first aspect of the present application, the main body plate has a side surface, the side surface is spaced apart from the groove wall in a direction parallel to the first surface, and the adjusting screw hole penetrates to the side surface in a direction parallel to the first surface and away from the first groove. In this way, the adjusting screw hole penetrates to the side surface of the main body plate from the side wall where the adjusting screw hole is located, so that the end of the adjusting member can be exposed to the main body plate, and a tester can rotate the adjusting member through the exposed end of the adjusting member.

[0024] In a possible implementation of the first aspect of the present application, the first surface further has a second groove, and the second groove is spaced apart from the first groove in a length direction of the main body plate; the groove wall on a side of the first groove close to the second groove is provided with an adjusting screw hole, and the adjusting screw hole extends in a second direction and is connected with the first groove and the second groove. In this way, the end of the adjusting member away from the stopper can enter the second groove through the adjusting screw hole, and the space of the second groove can be used for the tester to rotate the adjusting member.

[0025] In a possible implementation of the first aspect of the present application, the first groove has two first groove walls distributed in a second direction and two second groove walls distributed in a third direction, the second direction is a length direction of the main body plate, and the third direction is a width direction of the main body plate; the stopper includes a first stopper and a second stopper, and the adjusting member includes a first adjusting member and a second adjusting member; the first stopper is connected with the first groove wall through the first adjusting member, and the second stopper is connected with the second groove wall through the second adjusting member; the first adjusting member is used to move the first stopper in the second direction, and the second adjusting member is used to move the second stopper in the third direction. In this way, the first stopper and the second stopper can abut against the battery from different directions respectively, and the battery is positioned in different directions, thereby enhancing the stability of the battery in the first groove.

[0026] In a possible implementation of the first aspect of the present application, the test fixture further includes a temperature measurement assembly, which includes a temperature measurement module and a temperature display that are electrically connected to each other, the temperature measurement module is arranged on the bottom surface of the first groove and is configured to contact the battery to measure the temperature, and the temperature display is arranged on the second surface. In this way, the temperature of the battery before and after the drop test is also an important indicator of safety, and the temperature measurement assembly can measure the temperature of the battery in real time, providing a reliable basis for battery safety evaluation.

[0027] In a possible implementation of the first aspect of the present application, at least one second counterweight is arranged on the second surface in a stacked manner, the second counterweight is provided with a hollow opening, and the projection of the temperature display on the surface of the second counterweight is located in the hollow opening in the first direction. In this way, the hollow opening allows the second counterweight to not block the temperature display, and the test personnel can observe the display data of the temperature display through the hollow opening.

[0028] In a second aspect, a test device is provided, which includes the test fixture of the first aspect and a support, a lifting mechanism, and a collision member. The lifting mechanism is installed on the support and is configured to carry the test fixture. The collision member is arranged below the lifting mechanism and includes a cone portion configured to impact the test fixture.

[0029] The test device provided in the second aspect of the present application can ensure that the impact position after the drop test is located at the test point, thereby ensuring the accuracy of the test results and the safety evaluation results, based on the adjustable weight and gravity center position of the test fixture.

[0030] In a possible implementation of the second aspect of the present application, the test device further includes a positioning assembly configured to position the test fixture on the lifting mechanism, so that the projection of the cone portion on the surface of the test fixture is located at the test point of the test fixture. In this way, the positioning assembly can accurately position the test fixture on the lifting mechanism, so that the test point on the test fixture corresponds to the cone portion of the collision member in the vertical direction, thereby ensuring the accuracy of the drop test.

[0031] Thirdly, a testing method is provided, applied to the testing apparatus of the second aspect described above. The testing method includes: installing a battery into a first groove of a testing fixture; adjusting the number and distribution of counterweights on the testing fixture so that the total weight of the testing fixture and the battery is the same as the weight of the mobile terminal, and the distance between the center of gravity of the testing fixture and its geometric center is less than a preset distance; mounting the testing fixture on a lifting mechanism such that the rear cover of the testing fixture faces the impact component, and the test points on the rear cover and the conical portion of the impact component are distributed vertically; controlling the lifting mechanism to raise the testing fixture to a predetermined height, and then releasing the testing fixture to allow it to fall freely, so that the test points impact the conical portion.

[0032] In one possible implementation of the third aspect of this application, the preset distance is less than or equal to 5mm. Attached Figure Description

[0033] Figure 1 A structural diagram of a mobile terminal provided in an embodiment of this application;

[0034] Figure 2 for Figure 1 An exploded view of the mobile terminal shown.

[0035] Figure 3 This is a schematic diagram of the structure of a test fixture provided in an embodiment of this application;

[0036] Figure 4 for Figure 3 The exploded view of the test fixture shown is shown.

[0037] Figure 5 for Figure 4 A schematic diagram of the structure of one side of the main body plate of the test fixture shown;

[0038] Figure 6 This is a schematic diagram of another test fixture provided in an embodiment of this application;

[0039] Figure 7 An exploded view of the structure of a test fixture provided in an embodiment of this application;

[0040] Figure 8 for Figure 7 The diagram shows the structure of the side where the back cover is located in the assembled state of the test fixture.

[0041] Figure 9 for Figure 8 A magnified view of a portion of point a.

[0042] Figure 10 An exploded view of another test fixture provided in an embodiment of this application;

[0043] Figure 11 An exploded view of a test fixture with a second counterweight according to an embodiment of the present application;

[0044] Figure 12 An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; Figure 11 An exploded view of a test fixture with a second counterweight according to an embodiment of the present application;

[0045] Figure 13 An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; Figure 12 An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; An exploded view of a test fixture with a second counterweight according to an embodiment of the present application;

[0046] An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; Figure 14 An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; An exploded view of a test fixture with a second counterweight according to an embodiment of the present application;

[0047] An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; Figure 15 An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; An exploded view of a test fixture with a second counterweight according to an embodiment of the present application;

[0048] An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; Figure 16 An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; An exploded view of a test fixture with a second counterweight according to an embodiment of the present application;

[0049] An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; Figure 17 An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; An exploded view of a test fixture with a second counterweight according to an embodiment of the present application;

[0050] An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; Figure 18 An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; An exploded view of a test fixture with a second counterweight according to an embodiment of the present application;

[0051] An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; Figure 19 An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; An exploded view of a test fixture with a second counterweight according to an embodiment of the present application;

[0052] An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; Figure 20 An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; An exploded view of a test fixture with a second counterweight according to an embodiment of the present application;

[0053] An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; Figure 21 An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; An exploded view of a test fixture with a second counterweight according to an embodiment of the present application;

[0054] An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; Figure 22 An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; An exploded view of a test fixture with a second counterweight according to an embodiment of the present application;

[0055] An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; Figure 23 An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; Figure 22 An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; An exploded view of a test fixture with a second counterweight according to an embodiment of the present application;

[0056] An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; Figure 24 An exploded view of a test fixture with a second counterweight according to an embodiment of the present application; An exploded view of a test fixture with a second counterweight according to an embodiment of the present application;

[0057] Reference signs:

[0058] 100 - mobile terminal;

[0059] 110 - display module, 120 - shell, 121 - middle frame, 122 - battery cover, 130 - mainboard, 140 - battery;

[0060] 200 - test fixture;

[0061] 210 - main plate, 210a - first surface, 210b - second surface, 210c - side surface, 211 - first groove, 211a - first groove wall, 211b - second groove wall, 212 - counterweight hole, 2121 - first counterweight hole, 2122 - second counterweight hole, 213 - third connecting hole, 214 - second groove, 215 - adjusting screw hole, 216 - guide hole;

[0062] 220 - rear cover, 221 - first connecting hole, 222 - second connecting hole;

[0063] 230 - first counterweight;

[0064] 240 - connecting piece, 241 - first end;

[0065] 250 - second counterweight, 251 - fourth connecting hole, 252 - hollowed-out opening;

[0066] 260 - stop block, 261 - first stop block, 262 - second stop block, 263 - guide piece;

[0067] 270 - adjusting piece, 271 - first adjusting piece, 272 - second adjusting piece;

[0068] 280 - temperature measuring assembly, 281 - temperature measuring module, 282 - temperature display;

[0069] 300 - test device;

[0070] 310 - support, 311 - base, 312 - support column, 320 - lifting mechanism, 330 - collision piece, 331 - cone part, 340 - positioning assembly. DETAILED DESCRIPTION

[0071] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0072] Hereinafter, the terms "first", "second", and the like are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features.

[0073] In addition, in the present application, the orientation terms such as "upper", "lower" and the like are defined relative to the orientation in which the components are shown in the drawings, and it should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and can be changed accordingly according to the change of the orientation in which the components are placed in the drawings.

[0074] In the present application, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, the "connection" can be a fixed connection, or a detachable connection, or an integral; can be directly connected, or indirectly connected through an intermediate medium.

[0075] The embodiment of the present application provides a mobile terminal 100. Specifically, the mobile terminal 100 can be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a camera, a notebook computer, a wearable device, etc. For the convenience of description, the mobile terminal 100 is taken as a mobile phone for example in the following.

[0076] Please refer to Figure 1 and Figure 2 , Figure 1 The structural diagram of the mobile terminal 100 provided by the embodiment of the present application is shown in Figure 2 The exploded view of the mobile terminal 100 is shown in Figure 1 It can be known from the above that in the embodiment, the mobile terminal 100 is a mobile phone, and can be in an approximately rectangular plate structure. The mobile terminal 100 can include a display module 110, a housing 120, a mainboard 130 and a battery 140, and of course can also include Figure 1 and Figure 2 other electronic devices not shown in the drawings.

[0077] The display module 110 is used to display images, videos and the like. The display module 110 can adopt a flexible display screen, or can adopt a rigid display screen.

[0078] The above-mentioned shell 120 is used to protect the electronic devices inside the mobile terminal 100, and the shell 120 can include a middle frame 121 and a battery cover 122. Among them, the middle frame 121 mainly serves as the physical frame of the mobile terminal 100, and plays a role in mounting and supporting corresponding electronic devices or structural members, for example, the middle frame 121 is used to fix and support the display module 110; the battery cover 122 is located on the side of the middle frame 121 away from the display module 110, and the edge of the battery cover 122 is fixedly connected with the middle frame 121. Exemplarily, the battery cover 122 can be fixed on the middle frame 121 by bonding, screw connection, welding, clamping and the like. The battery cover 122 and the middle frame 121 enclose a receiving cavity inside the mobile terminal 100, and the receiving cavity is used to accommodate corresponding electronic devices inside the mobile terminal 100.

[0079] The above-mentioned mainboard 130 is arranged in the receiving cavity enclosed by the battery cover 122 and the middle frame 121, and is used to mount corresponding electronic devices inside the mobile terminal 100, such as a system on chip (SoC), a universal flash storage (UFS), a camera module, and a capacitor, a resistor, an inductor and the like, and to realize electrical connection between the corresponding electronic devices.

[0080] The above-mentioned battery 140 is also arranged in the receiving cavity enclosed by the battery cover 122 and the middle frame 121, and is used to supply power to the electronic devices of the mobile terminal 100. The battery 140 includes various types, exemplarily, the battery 140 can be a nickel-hydrogen battery, a lithium battery and the like. Among them, the battery 140 is mainly protected by the battery cover 122 and the middle frame 121 to cope with the impact situation (such as impact generated by the mobile terminal 100 falling) that may occur during use of the mobile terminal 100, and to reduce the degree of influence on the safety of the battery 140.

[0081] When the mobile terminal 100 is impacted, the structure of the mobile terminal 100 itself determines that impacts in different directions have different degrees of influence on the safety of the battery 140. For example, when the front side (i.e., the side on which the display module 110 is located) of the mobile terminal 100 is impacted, the impact force generated by the impact directly acts on the display module 110, and then is transmitted to the battery 140 through the middle frame 121. The structure of the display module 110 and the middle frame 121 offsets most of the energy of the impact force, so that the impact on the front side of the mobile terminal 100 has less influence on the safety of the battery 140. When the side of the mobile terminal 100 is impacted, the impact force generated by the impact directly acts on the middle frame 121. Since the middle frame 121 has high structural strength, it can offset most of the energy of the impact force, so that the impact on the side of the mobile terminal 100 also has less influence on the safety of the battery 140. However, when the back side (i.e., the side on which the battery cover 122 is located) of the mobile terminal 100 is impacted, the impact force generated by the impact directly acts on the battery cover 122. Since the battery cover 122 is usually thin in order to meet the performance requirements of the mobile terminal 100 such as heat dissipation, thinness, etc., the structural strength is limited, and the ability to offset the energy of the impact force is also limited. Therefore, the impact on the back side of the mobile terminal 100 has a greater influence on the safety of the battery 140.

[0082] Therefore, it is usually necessary to perform safety tests on the battery 140 of the mobile terminal 100 under impact scenarios to evaluate the influence of the impact on the safety of the battery 140. Among them, the main test is the drop test, which is used to simulate the scenario in which the mobile terminal 100 is impacted when it falls from the user's hand or other positions during actual use. As known from the above, the impact on the back side of the mobile terminal 100 has a greater influence on the safety of the battery 140. Therefore, in the drop test, the battery cover 122 on the back side of the mobile terminal 100 is impacted, which can more accurately evaluate the influence of the impact on the safety of the battery 140. On this basis, the predetermined test point on the battery cover 122 within the projection coverage area of the battery 140 is impacted, which can further ensure the reliability of the test and evaluation results.

[0083] At present, when the prototype of the mobile terminal 100 is subjected to the drop test, due to the uneven distribution of the mass of the prototype, the prototype will be affected by the gravitational torque during the drop process, causing the prototype to roll over and skew, resulting in uncontrollable posture of the prototype during the drop process and the position of the impact after the drop. This can easily cause problems such as the impact position not being on the battery cover 122, or the impact position being on the battery cover 122 but deviating from the predetermined test point, etc., ultimately resulting in poor reliability of the safety test results and evaluation results of the battery 140.

[0084] To address the aforementioned issues, this application provides a test fixture 200 for replacing the prototype and performing safety tests (specifically drop tests) on the battery 140 of the mobile terminal 100. Please refer to [link to relevant documentation]. Figure 3 , Figure 4 and Figure 5 , Figure 3 This is a schematic diagram of the structure of a test fixture 200 provided in an embodiment of this application. Figure 4 for Figure 3 The exploded view of the test fixture 200 shown is shown. Figure 5 for Figure 4 This is a schematic diagram of the structure of one side of the main body plate 210 of the test fixture 200, where the first surface 210a is located. Figure 3 and Figure 4 The dotted line in the figure represents the first recess 211 that is obscured. The test fixture 200 includes a main body plate 210, a back cover 220, and a plurality of first counterweights 230. The main body plate 210 is used to simulate the main body of the mobile terminal 100, the back cover 220 is used to simulate the battery cover 122 of the mobile terminal 100, and the first counterweights 230 are used to adjust the weight and mass distribution of the test fixture 200 (i.e., adjust the center of gravity).

[0085] For ease of description below, an XYZ coordinate system is established, defining the width direction of the main body plate 210 as the X-axis, the length direction of the main body plate 210 as the Y-axis, and the thickness direction of the main body plate 210 as the Z-axis. It is understood that the above coordinate system can be flexibly set according to actual needs; this application only provides an example and should not be considered a specific limitation of this application.

[0086] Specifically, the main body plate 210 has a first surface 210a and a second surface 210b distributed along a first direction, which is the thickness direction of the main body plate 210 (i.e., the Z-axis direction). A first groove 211 for placing a battery (not shown) is provided on the first surface 210a. After the battery is placed in the first groove 211, a rear cover 220 stacked on the first surface 210a can cover the first groove 211, thereby accommodating the battery within the test fixture 200. For example, the rear cover 220 can be detachably connected to the main body plate 210 by means such as snap-fit ​​or threaded fastener connection, facilitating battery placement and removal. A plurality of spaced counterweight holes 212 are provided on the second surface 210b. The counterweight holes 212 are used to connect first counterweights 230. Multiple first counterweights 230 can be detachably connected to the corresponding counterweight holes 212 as needed, thereby fixing them to the main body plate 210 as part of the test fixture 200. For example, the connection between the first counterweight 230 and the counterweight hole 212 can be a threaded connection, that is, the counterweight hole 212 is set as a threaded hole, and the first counterweight 230 is provided with external threads.

[0087] Wherein, because the impact force generated by the falling of the mobile terminal 100 is related to its weight, in order to restore the impact force received by the mobile terminal 100 when falling, the weight of the test fixture 200 as a whole can be adjusted by adjusting the number of the first weight members 230 on the second surface 210b, so that the total weight of the test fixture 200 and the battery and the weight of the mobile terminal 100 are the same, providing a reliable prerequisite for improving the reliability of the test results.

[0088] In addition, for the falling test, the position of the falling impact needs to be located at a predetermined test point (for example, a point corresponding to the geometric center of the battery) on the back cover 220, so the mass distribution of the test fixture 200 can be adjusted by adjusting the distribution position of the plurality of first weight members 230 on the second surface 210b, so that the center of gravity of the test fixture 200 is as close as possible to the geometric center of the test fixture 200 in the plane perpendicular to the thickness direction of the main plate 210, for example, the distance between the above-mentioned center of gravity and the above-mentioned geometric center is not more than 5mm. In this way, the arm of the moment generated by the gravity of the test fixture 200 can be reduced, thereby reducing the gravity moment, and even eliminating the gravity moment, reducing the possibility of turning and skewing of the test fixture 200 during falling, improving the controllability of the posture of the test fixture 200 during falling, so that the test fixture 200 falls in a horizontal posture with the back cover 220 downward, and maintains this horizontal posture during the falling process and at the moment of impact, thereby ensuring that the impact position is located at the predetermined test point (which can be a local area with a certain area) on the back cover 220, to improve the reliability of the test results of the falling test, and improve the reliability of the evaluation results based on the evaluation of the safety of the battery based on the test results.

[0089] Further, the plurality of first weight members 230 can have different masses, for example, the plurality of first weight members 230 can have masses of 1g, 2g, 3g, 5g, 10g, 20g, 30g and 50g, etc. By selecting first weight members 230 with different masses and adjusting the distribution position of the first weight members 230, the weight and mass distribution of the test fixture 200 can be more accurately adjusted.

[0090] In some embodiments, the main plate 210 and the back cover 220 can be made of metal materials, such as stainless steel, aluminum and its alloys, titanium and its alloys, etc. The metal materials can ensure the structural strength of the test fixture 200, and can ensure the reliability of the structure during multiple drop impacts, thereby realizing multiple reuse of the test fixture 200, prolonging the scrap cycle, and reducing the test cost. It should be noted that the back cover 220 is a component directly subjected to impact, and the impact force generated by the impact has a greater impact on the structure of the back cover 220 than the main plate 210, so the scrap cycle of the back cover 220 can be shorter than that of the main plate 210. However, in the entire test fixture 200, whether in terms of structural proportion or cost proportion, the back cover 220 is smaller than the main plate 210, so even if the scrap cycle of the back cover 220 is shorter than that of the main plate 210 and the replacement frequency is higher, it does not affect the advantage of the test fixture 200 having lower test cost relative to the sample machine.

[0091] In some embodiments, please refer to Figure 3 , Figure 4 and Figure 5 , the plurality of counterweight holes 212 are distributed at different positions on the second surface 210b, and the plurality of counterweight holes 212 are divided into a plurality of first counterweight holes 2121 and a plurality of second counterweight holes 2122 according to the different distribution positions. Among them, the first counterweight hole 2121 is distributed within the coverage range of the vertical projection of the groove bottom surface of the first groove 211 on the second surface 210b, and the second counterweight hole 2122 is distributed outside the coverage range of the vertical projection of the groove bottom surface of the first groove 211 on the second surface 210b. The above-mentioned vertical projection refers to the projection in the direction perpendicular to the second surface 210b (i.e. the thickness direction of the main plate 210). In this way, the first counterweight 230 can be selectively connected to the first counterweight hole 2121 or the second counterweight hole 2122, so that in the plane perpendicular to the thickness direction of the main plate 210, the first counterweight 230 can be located within or outside the area where the first groove 211 (i.e. the battery) is located, meeting the different counterweight needs of the test fixture 200 for batteries of different weights.

[0092] In some examples, please refer to Figure 3 , Figure 4 and Figure 5, of the plurality of first counterweights 230 on the second surface 210b are distributed outside the area where the first recess 211 is located, mainly for the case that the battery has a large weight. Specifically, since the test fixture 200 is designed to simulate the structure of the mobile terminal 100 to the greatest extent possible, the first recess 211 is located on one side edge of the main plate 210 in the length direction (i.e., the Y-axis direction) of the main plate 210, so that the first recess 211 is offset from the geometric center of the main plate 210. When the battery has a large weight, for example, when the physical density of the battery is greater than that of the main plate 210, the mass distribution of the overall structure formed by the battery and the test fixture 200 is more concentrated at the location of the first recess 211, i.e., the center of gravity of the overall structure is offset from the geometric center of the test fixture 200 and is closer to the first recess 211. Therefore, by arranging most of the first counterweights 230 outside the area where the first recess 211 is located, the mass proportion of the area outside the first recess 211 is increased, the problem of uneven mass distribution of the overall structure is improved, the center of gravity of the overall structure is returned to the location of the geometric center of the test fixture 200, the possibility of the test fixture 200 turning over and tilting during the falling process is reduced, and the controllability of the posture of the test fixture 200 during the falling process is improved.

[0093] In some embodiments, please refer to Figure 6 , Figure 6 Another structural schematic diagram of a test fixture 200 provided by an embodiment of the present application is shown. Of the plurality of first counterweights 230 on the second surface 210b, most of the first counterweights 230 are distributed within the area where the first recess 211 is located, mainly for the case that the battery has a small weight. Specifically, based on the above-mentioned location of the first recess 211 being offset from the geometric center of the main plate 210, when the battery has a small weight, for example, when the physical density of the battery is less than that of the main plate 210, the mass distribution of the overall structure formed by the battery and the test fixture 200 is more concentrated at a location other than the first recess 211, i.e., the center of gravity of the overall structure is offset from the geometric center of the test fixture 200 and is far away from the location of the first recess 211. Therefore, by arranging most of the first counterweights 230 within the area where the first recess 211 is located, the mass proportion of the area where the battery is located is increased, the problem of uneven mass distribution of the overall structure is improved, the center of gravity of the overall structure is returned to the location of the geometric center of the test fixture 200, the possibility of the test fixture 200 turning over and tilting during the falling process is reduced, and the controllability of the posture of the test fixture 200 during the falling process is improved.

[0094] In some embodiments, please refer to continue Figure 6A plurality of weight holes 212 are uniformly distributed on the second surface 210b to facilitate cooperation with the first weight member 230 to adjust the mass distribution of the test fixture 200. For example, the plurality of weight holes 212 are distributed in a rectangular array on the second surface 210b, and the row spacing of each row of the rectangular array is the same, and the column spacing of each column is the same. In addition, the row spacing and the column spacing of the rectangular array can also be the same.

[0095] In some embodiments, please refer to the continuation Figure 6 The first weight hole 2121 is provided as a blind hole, i.e., the first weight hole 2121 does not penetrate the main body plate 210 in the first direction, so that the first weight hole 2121 does not form an aperture on the groove bottom surface of the first groove 211. In this way, for the battery installed in the first groove 211, the adverse effects of the first weight hole 2121 and the first weight member 230 cooperating with the first weight hole 2121 on the battery can be avoided.

[0096] In addition, since the second weight hole 2122 is located outside the coverage range of the vertical projection of the groove bottom surface of the first groove 211 on the second surface 210b, its structure does not affect the first groove 211 and the battery in the first groove 211, so the second weight hole 2122 can be provided as a blind hole or a through hole penetrating the main body plate 210 in the first direction according to specific needs. For example, the second weight hole 2122 of the present application is provided as a through hole.

[0097] In some embodiments, please refer to Figure 7 , Figure 7 A structural explosion diagram of a test fixture 200 provided by an embodiment of the present application. According to Figure 7 and Figure 4 It can be seen that Figure 7 The rear cover 220 is provided with a plurality of first connecting holes 221, the first connecting holes 221 are provided as through holes penetrating the rear cover 220 in the first direction, in addition, the second weight hole 2122 is also provided as a through hole penetrating the main body plate 210 in the first direction, and the plurality of first connecting holes 221 and the plurality of second weight holes 2122 are one-to-one corresponding and in communication. In this way, the first connecting holes 221 and the second weight holes 2122 in communication with each other can be used to cooperate with the corresponding connecting members to fixedly connect the rear cover 220 and the main body plate 210, avoiding the problem of separation of the rear cover 220 and the main body plate 210 during the test, resulting in test failure.

[0098] Exemplarily, among the plurality of first counterweight members 230 arranged on the main plate 210, at least part of the first counterweight members 230 are simultaneously fitted in the first connecting hole 221 and the second counterweight hole 2122 which are in communication with each other, i.e. one end of the first counterweight member 230 is inserted into the first connecting hole 221 and the other end of the first counterweight member 230 is inserted into the second counterweight hole 2122, so that the part of the first counterweight member 230 plays a role of counterweight and also plays a role of connecting the back cover 220 and the main plate 210, thus realizing different functions by using the same structural member, which can simplify the overall structure of the test fixture 200.

[0099] Further, for the plurality of first counterweight members 230 arranged on the second surface 210b, it can be determined according to the distribution position of the first counterweight members 230 which first counterweight members 230 are used to connect the back cover 220 and the main plate 210. Specifically, please continue to refer to Figure 7 As can be seen from the figure, the second counterweight hole 2122 at the four corners of the main plate 210 is connected with the first counterweight member 230, and because the reliability of connecting the back cover 220 and the main plate 210 at the four corners is higher. Therefore, the first counterweight member 230 at the four corners of the main plate 210 can be selected to simultaneously cooperate with the second counterweight hole 2122 and the first connecting hole 221 to connect the back cover 220 and the main plate 210. In addition, according to the connection needs, the first counterweight member 230 at any position of the main plate 210 can also be selected to simultaneously cooperate with the second counterweight hole 2122 and the first connecting hole 221 to play a role of connecting the back cover 220 and the main plate 210.

[0100] In some examples, please refer to Figure 8 and Figure 9 , Figure 8 for Figure 7 the structure diagram of the side where the back cover 220 is located in the assembled state of the test fixture 200, Figure 9 for Figure 8 the enlarged view of a in FIG. 8. Among them, the first counterweight member 230 for connecting the back cover 220 and the main plate 210 is further fitted into the first connecting hole 221 from the second counterweight hole 2122; the first counterweight member 230 which is not connected with the back cover 220 and the main plate 210 is only fitted in the second counterweight hole 2122. The first counterweight member 230, the second counterweight hole 2122 and the first connecting hole 221 can all be threadedly fitted, i.e. the second counterweight hole 2122 and the first connecting hole 221 are both provided as threaded holes, and the first counterweight member 230 can adopt a threaded fastener such as a screw.

[0101] For example, in order to achieve the purpose of the first counterweight 230 fitting only in the second counterweight hole 2122, and to achieve the purpose of the first counterweight 230 fitting further in the first connecting hole 221, this can be achieved by controlling the degree of fitting of the first counterweight 230, or by controlling the size of the first counterweight 230 itself. For example, when the first counterweight 230 is a screw, this can be achieved by controlling the screw's screw-in depth, or by controlling the screw's length.

[0102] In some embodiments, please refer to Figure 10 , Figure 10 This is an exploded view of another test fixture 200 provided in an embodiment of this application. The rear cover 220 has multiple second connecting holes 222, and the first surface 210a has multiple third connecting holes 213. The second connecting holes 222 are through holes, and the third connecting holes 213 can be through holes or blind holes. The multiple second connecting holes 222 and the multiple third connecting holes 213 are arranged in a one-to-one correspondence and are interconnected. The second connecting holes 222 and the third connecting holes 213 are used to cooperate with the connector 240 to form a connection structure, providing another connection method for the connection between the rear cover 220 and the main body plate 210. This connection method can meet the connection requirements of the rear cover 220 and the main body plate 210 in certain situations.

[0103] Specifically, taking the connection between the rear cover 220 and the main body plate 210 using a portion of the first counterweight 230 as an example, since the first counterweight 230 must first meet the counterweight requirements, it is possible that the first counterweight 230 is only set in the first counterweight hole 2121 and not in the second counterweight hole 2122. In this case, the rear cover 220 and the main body plate 210 cannot be connected through the first counterweight 230; or there may be only a very small number of first counterweight 230s (e.g., only one or two) set in the second counterweight hole 2122. In this case, the rear cover 220 and the main body plate 210 are connected through the first counterweight 230, but the connection points are few, which may affect the reliability of the connection. Therefore, to deal with these situations, the connection between the rear cover 220 and the main body plate 210 is achieved by using the second connecting hole 222 and the third connecting hole 213 in conjunction with the connector 240, which is not restricted by the counterweight factor.

[0104] Exemplarily, the first surface 210a is provided with at least four third connecting holes 213, respectively located at four corners of the main plate 210, and the second connecting holes 222 on the back cover 220 correspond to the third connecting holes 213, also provided with at least four, respectively located at four corners of the back cover 220, and the connecting piece 240 forms a connecting point at each of the four corners, and the connection reliability is higher. At the same time, the connecting points formed at the four corners are centrally symmetric about the geometric center of the main plate 210, and do not affect the adjustment of the first counterweight 230 to the center of gravity of the test fixture 200.

[0105] In addition, from the perspective of counterweight, the second connecting hole 222 and the third connecting hole 213 correspond to the weight reduction of the back cover 220 and the main plate 210 respectively, and the connecting piece 240 corresponds to the weight increase of the test fixture 200. Therefore, in order to reduce the influence of the second connecting hole 222, the third connecting hole 213 and the connecting piece 240 on the counterweight, the size of the second connecting hole 222, the third connecting hole 213 and the connecting piece 240 is as small as possible. For example, the hole diameter of the counterweight hole 212 (for example, 1mm-2.5mm) can be referred to, and the hole diameter of the second connecting hole 222 and the third connecting hole 213 is set to be smaller (for example, the hole diameter of the second connecting hole 222 and the third connecting hole 213 can be less than 1mm), and the diameter of the connecting piece 240 matches the hole diameter of the second connecting hole 222 and the third connecting hole 213.

[0106] Further, the second connecting hole 222 and the third connecting hole 213 and the connecting piece 240 can be threadedly connected, for example, the connecting piece 240 can adopt a threaded fastener such as a screw, and the second connecting hole 222 and the third connecting hole 213 are provided as threaded holes.

[0107] In some embodiments, please refer to Figure 11 , Figure 11 Another structure explosion diagram of the test fixture 200 provided by the embodiment of the application. The first connecting hole 221 and the second connecting hole 222 are provided on the back cover 220, the third connecting hole 213 is provided on the first surface 210a, the first connecting hole 221 corresponds to the second counterweight hole 2122, and the second connecting hole 222 corresponds to the third connecting hole 213. Based on this, the connection mode of the back cover 220 and the main plate 210 has two ways, which can be connected by the first counterweight 230 at the same time through the first connecting hole 221 and the second counterweight hole 2122, or connected by the connecting piece 240 at the same time through the second connecting hole 222 and the third connecting hole 213, or connected by the above two ways at the same time.

[0108] Exemplarily, please continue to refer to Figure 11 , from the perspective of counterweight, Figure 11Most of the first counterweights 230 are arranged in the corresponding area of the first groove 211, that is, most of the first counterweights 230 are arranged in the first counterweight hole 2121, and the remaining small number of first counterweights 230 are arranged in the second counterweight hole 2122. Among them, one side edge position of the main plate 210 in the length direction (that is, the Y-axis direction) is connected with the first counterweight 230 through a second counterweight hole 2122. At the same time, the four corners of the main plate 210 are respectively provided with a third connecting hole 213, that is, the main plate 210 has two third connecting holes 213 on both sides in the Y-axis direction.

[0109] Based on this, the connection between the back cover 220 and the main plate 210 can be realized through the above-mentioned second counterweight hole 2122 and the above-mentioned two third connecting holes 213, that is, the second counterweight hole 2122 is connected with the corresponding first connecting hole 221 through the first counterweight 230, and the two third connecting holes 213 are respectively connected with the corresponding second connecting hole 222 through the connecting piece 240, so as to form three connecting points and realize the stable connection between the back cover 220 and the main plate 210.

[0110] In some embodiments, please refer to Figure 12 and Figure 13 , Figure 12 for Figure 11 the structure schematic diagram of the test fixture 200 in the assembled state, Figure 13 for Figure 12 the schematic diagram of the A-A section. Among them, the third connecting hole 213 is arranged as a through hole, so that the length of the third connecting hole 213 is the same as the thickness of the main plate 210, which maximizes the matching area between the connecting piece 240 and the third connecting hole 213, so as to ensure the reliability of the connection between the back cover 220 and the main plate 210 through the connecting piece 240.

[0111] At the same time, please continue to refer to Figure 13 , in order to avoid the influence of the connecting piece 240 on the first counterweight 230 and other components on the second surface 210b, the part of the connecting piece 240 matched with the third connecting hole 213 is completely accommodated in the third connecting hole 213, that is, in the thickness direction of the main plate 210, the distance L between the first end 241 of the connecting piece 240 matched in the third connecting hole 213 and the first surface 210a is less than or equal to the distance between the first surface 210a and the second surface 210b (that is, the thickness of the main plate 210), so that the first end 241 of the connecting piece 240 is completely accommodated in the third connecting hole 213 without protruding from the second surface 210b.

[0112] In some embodiments, please refer to Figure 14 , Figure 14An exploded view of a test fixture 200 with a second weight member 250 is provided in an embodiment of the present application. The test fixture 200 further includes the second weight member 250, which is arranged in a stack on the second surface 210b. The number of the second weight member 250 can be one or more. The second weight member 250 is used to increase the overall weight of the test fixture 200, and together with the first weight member 230, to achieve the weight balancing function of the test fixture 200. The second weight member 250 is provided with a plurality of fourth connecting holes 251. The number and distribution of the fourth connecting holes 251 are the same as those of the plurality of weight holes 212. In this way, the first weight member 230 can pass through the fourth connecting holes 251 and be connected to the weight holes 212, so that the second weight member 250 can be fixedly connected to the main plate 210 by using the first weight member 230, without the need for additional connecting members, thereby simplifying the structure of the test fixture 200.

[0113] Further, please continue to refer to Figure 14 The rear cover 220 is provided with a first connecting hole 221, which can be connected to the second weight hole 2122 by the first weight member 230, to achieve the connection between the rear cover 220 and the main plate 210. Based on this, the first weight member 230 connected to the second weight hole 2122 can also be connected to the first connecting hole 221 and the fourth connecting hole 251 at the same time, thereby achieving the connection between the rear cover 220 and the main plate 210, and the connection between the main plate 210 and the second weight member 250 at the same time. Therefore, the rear cover 220, the main plate 210, and the second weight member 250 can be connected as a whole by using only the first weight member 230, which can further simplify the connection structure of the test fixture 200.

[0114] In one example, please continue to refer to Figure 14 The second weight member 250 is a plate-shaped structure with the same size as the main plate 210, i.e., the projection of the second weight member 250 and the main plate 210 on the plane of the first surface 210a (i.e., the plane perpendicular to the Z-axis direction) coincide. In this way, after the second weight member 250 is fixed on the main plate 210, it will not affect the mass distribution of the main plate 210 or even the test fixture 200, thereby not affecting the adjustment of the first weight member 230 to the center of gravity of the test fixture 200. For example, the length of the second weight member 250 and the main plate 210 can be 161-163 mm, and the width can be 73-77 mm.

[0115] In some embodiments, please refer to Figure 15 , Figure 15 Another exploded view of a test fixture 200 with a second weight member 250 is provided in an embodiment of the present application. Figure 15 The test fixture 200 shown in Figure 14Compared to the test fixture 200 shown, the difference lies in that the rear cover 220 does not have a first connecting hole 221, but instead has a second connecting hole 222, and the main body plate 210 has a third connecting hole 213. Thus, the connection between the rear cover 220 and the main body plate 210 is achieved through a connection structure formed by the second connecting hole 222, the third connecting hole 213, and the connector 240; the connection between the main body plate 210 and the second counterweight 250 is achieved through a connection structure formed by the counterweight hole 212, the fourth connecting hole 251, and the first counterweight 230. Compared to the previous method of using one connection structure to simultaneously meet two connection requirements, this method uses two connection structures to meet two connection requirements separately, reducing the load on a single connection structure and lowering the strength requirements for the corresponding connecting components in the connection structure.

[0116] In some embodiments, please refer to Figure 16 , Figure 16 This is a schematic diagram of the structure of a main body plate 210 of the test fixture 200 provided in this application embodiment. A second groove 214 is provided on the first surface 210a. The second groove 214 and the first groove 211 are distributed at intervals. For example, the second groove 214 and the first groove 211 can be distributed along a second direction, which is the length direction (i.e., the Y-axis direction) of the main body plate 210. The purpose of providing the second groove 214 is to reduce the weight of the main body plate 210 and provide more adjustment space for the counterweight adjustment of the test fixture 200.

[0117] Specifically, as mentioned earlier, the main board 210 can be made of metal. Taking metal as an example, metal has a high physical density, so using metal for the main board 210 would result in a significant weight. This could lead to the main board 210 weighing more than the mobile terminal 100, leaving the test fixture 200 without room for adjusting the counterweight. That is, no matter how the counterweight is adjusted using the first counterweight 230 and the second counterweight 250, the total weight of the test fixture 200 and the battery will always exceed the weight of the mobile terminal 100. Therefore, by providing the second groove 214 on the main board 210, the weight of the main board 210 is reduced, making its weight significantly less than that of the mobile terminal 100, thus providing adjustment space for subsequent counterweight adjustments.

[0118] In addition, some of the counterweight holes 212 (specifically some of the second counterweight holes 2122) are located in the area where the second groove 214 is located. That is, some of the counterweight holes 212 are located within the coverage area of ​​the vertical projection of the bottom surface of the second groove 214 onto the second surface 210b (projection along the direction perpendicular to the second surface 210b). This is used to cooperate with the first counterweight 230 to make local counterweight adjustments in the area where the second groove 214 is located as needed.

[0119] Exemplarily, in the thickness direction of the main plate 210, the depth of the second groove 214 can be the same as that of the first groove 211, for example, the depth can be 4mm-5mm. Correspondingly, the thickness of the main plate 210 needs to be greater than the depth of the second groove 214 and the first groove 211, and also needs to reserve space for arranging the weight hole 212 in the thickness direction, based on which, the thickness of the main plate 210 can be 7mm-8.5mm.

[0120] In some embodiments, referring to Figure 17 , Figure 17 FIG. 1 is a schematic diagram of a structure inside the first groove 211 of the test fixture 200 provided by an embodiment of the present application. In order to make the test fixture 200 compatible with batteries of different length-width sizes, the length and width of the first groove 211 are set to be relatively large, for example, the length is 89mm-91mm and the width is 63mm-65mm. In this case, a battery of a small length-width size cannot be effectively positioned after being placed into the first groove 211.

[0121] Therefore, the stopper 260 and the adjusting member 270 are arranged inside the first groove 211, one end of the adjusting member 270 is connected to the stopper 260, the other end is connected to the groove wall of the first groove 211, and the adjusting member 270 itself is arranged as a movable structure, so that the adjusting member 270 can drive the stopper 260 to move in a direction perpendicular to the Z axis, so that the battery inside the first groove 211 is abutted between the stopper 260 and the groove wall of the first groove 211, thereby the battery can be positioned by the stopper 260. After a battery of different sizes is placed into the first groove 211, it can be positioned, the stability of the battery in the first groove 211 is ensured, and thus the effect of drop test is ensured.

[0122] In some examples, referring to Figure 17 In order to drive the stopper 260 to move, the adjusting member 270 itself can be arranged as a movable structure, for example, the adjusting member 270 adopts a spring. By using the telescopic characteristic of the spring, the movement requirement of the stopper 260 can be met, and the spring can also exert pressure on the stopper 260 to tightly abut the battery, thereby strengthening the positioning effect on the battery.

[0123] In other examples, referring to Figure 18 , Figure 18 FIG. 2 is a schematic diagram of another structure inside the first groove 211 of the test fixture 200 provided by an embodiment of the present application. In order to drive the stopper 260 to move, the adjusting member 270 can also be arranged as a structure capable of moving relative to the above-mentioned groove wall, for example, the adjusting member 270 adopts a threaded fastener such as a screw, and the above-mentioned groove wall is provided with an adjusting screw hole 215 (not shown in the figure) corresponding to the threaded fastener. Figure 18The aperture can be 0.4mm-0.6mm as shown by the dotted line. The adjusting screw hole 215 is threadedly connected with the adjusting member 270. The adjusting member 270 can drive the stopper 260 to move by rotating the adjusting member 270. Meanwhile, in order to facilitate the rotation of the adjusting member 270, the adjusting screw hole 215 extends from the side wall where it is located in a direction perpendicular to the Z axis, thereby penetrating to the side surface 210c of the main body plate 210, so that the end of the adjusting member 270 can be exposed to the main body plate 210, and the tester can rotate the adjusting member 270 through the exposed end of the adjusting member 270.

[0124] It should be noted that, Figure 17 With Figure 18 Only one stopper 260 is shown in the figure, which is mainly to show the connection relationship between the stopper 260 and the adjusting member 270 in the first groove 211, and is not used to limit the number of stoppers 260 in the first groove 211 and the orientation of the stoppers 260. In fact, the number of stoppers 260 in the first groove 211 and the corresponding groove wall of the first groove 211 to which the stopper 260 is connected can be determined according to the actual situation.

[0125] In some embodiments, please continue to refer to Figure 18 When the adjusting member 270 is a threaded fastener, it needs to be driven to move by rotating the stopper 260. For a small stopper 260, the stopper 260 will not interfere with the first groove 211 when rotating, so the adjusting member 270 and the stopper 260 can be fixedly connected at this time, that is, the stopper 260 rotates with the adjusting member 270.

[0126] In some embodiments, please refer to Figure 19 , Figure 19 The figure is a schematic view of another structure inside the first groove 211 of the test fixture 200 provided by the embodiments of the present application. At this time, the stopper 260 has a large volume, and the stopper 260 has a large length in the direction perpendicular to the thickness direction of the main body plate 210 (for example, in the Y axis direction). At this time, the stopper 260 will interfere with the first groove 211 if it rotates, so the adjusting member 270 and the stopper 260 can be rotatably connected in this case, that is, the stopper 260 does not rotate with the adjusting member 270, avoiding interference with the first groove 211.

[0127] In some embodiments, please continue to refer to Figure 19For the stop block 260, which has a large length dimension in the direction perpendicular to the thickness direction of the main body plate 210, in order to ensure the stability and consistency of the movement of various parts of the stop block 260 along its length direction during the movement of the stop block 260 with the adjusting member 270, the adjusting member 270 is connected at the midpoint of the length of the stop block 260, and guide members 263 are respectively provided at both ends of the adjusting member 270. The groove wall is provided with guide holes 216 that cooperate with the guide members 263. Figure 19 As shown by the dashed line, the guide 263 and the guide hole 216 are used to guide the stop 260 as the adjusting member 270 moves, thereby improving the smoothness of the movement.

[0128] In some embodiments, please refer to Figure 20 , Figure 20 This is a schematic diagram of another main body plate 210 of the test fixture 200 provided in this application embodiment. The first surface 210a of the main body plate 210 has a first groove 211 and a second groove 214, which are distributed along the Y-axis. With the second groove 214 present, a stop 260 and an adjusting member 270 are provided on the side wall of the first groove 211 near the second groove 214. When the adjusting member 270 uses a threaded fastener, an adjusting screw hole 215 is provided on the groove wall (…). Figure 20 (As shown by the dashed line) Extends along the Y-axis and connects the first groove 211 and the second groove 214. In this way, the end of the adjusting member 270 away from the stop 260 can enter the second groove 214 through the adjusting screw hole 215, and the space in the second groove 214 can be used by the tester to rotate the adjusting member 270.

[0129] It should be noted that there may be some counterweight holes 212 between the first groove 211 and the second groove 214, so the adjusting screw hole 215 connecting the first groove 211 and the second groove 214 needs to avoid these counterweight holes 212. Therefore, in the X-axis direction, the position of the adjusting screw hole 215 is completely offset from the position of the corresponding counterweight hole 212.

[0130] In addition, please continue to refer to Figure 20 To ensure that the position of the adjusting screw hole 215 is completely offset from the position of the corresponding counterweight hole 212, the position of the adjusting member 270, which fits within the adjusting screw hole 215, may deviate from the midpoint of the stop block 260 in the X-axis direction. In this case, the movement of the stop block 260 by the adjusting member 270 may present stability issues. Therefore, for example, a guide member 263 can be provided on the stop block 260, with the guide member 263 and the adjusting member 270 located on opposite sides of the midpoint of the stop block 260 in the X-axis direction. The guide member 263 and the guide hole 216 on the groove wall (…) Figure 20 (As shown by the dashed line in the middle) to guide and improve the stability of the movement of the stop 260.

[0131] In some embodiments, please refer to Figure 21 , Figure 21 This is a schematic diagram of the structure of another main body plate 210 of the test fixture 200 provided in this application embodiment. The first groove 211 has two first groove walls 211a distributed along a second direction and two second groove walls 211b distributed along a third direction. The second direction and the third direction are the length and width directions of the main body plate 210, respectively, i.e., the Y-axis direction and the X-axis direction. The stop block 260 within the first groove 211 includes a first stop block 261 and a second stop block 262. The first stop block 261 is connected to the first groove wall 211a via a first adjusting member 271, and the second stop block 262 is connected to the second groove wall 211b via a second adjusting member 272. Both the first stop block 261 and the second stop block 262 can be guided by guide members 263 for movement.

[0132] In this way, the first stop 261 can abut against the battery along the Y-axis direction, and the second stop 262 can abut against the battery along the X-axis direction. That is, the first stop 261 and the second stop 262 can abut against the battery from different directions respectively, positioning the battery in different directions and enhancing the stability of the battery in the first groove 211.

[0133] For example, please continue reading Figure 21 The first groove 211 includes a first stop 261 and two second stops 262. The first stop 261 is disposed on the first groove wall 211a of the first groove 211 near the second groove 214, and the two second stops 262 are disposed on the two second groove walls 211b respectively. In this way, the first stop 261 can clamp the battery with the first groove wall 211a on the other side in the Y-axis direction, and the two second stops 262 can clamp the battery in the X-axis direction, ensuring the reliability of battery positioning.

[0134] It should be noted that only one first stop 261 is provided in the first groove 211, and the first stop 261 is provided on the first groove wall 211a of the first groove 211 on the side of the first groove 211 closer to the second groove 214. The first stop 261 and the corresponding first adjusting member 271 are not provided at the location of the first groove wall 211a on the side of the first groove 211 away from the second groove 214. The reason for this arrangement is that space can be reserved on the first groove wall 211a on the side of the first groove 211 away from the second groove 214 for other components. For example, charging lines and charging interfaces can be arranged here, allowing the battery to be charged after being placed in the first groove 211, and enabling drop tests in a charged state.

[0135] In some embodiments, please refer to Figure 22 , Figure 22This is a schematic diagram of the main body plate 210 equipped with a temperature measuring component 280, provided in an embodiment of this application. The temperature measuring component 280 includes a temperature measuring module 281 and a temperature display 282. The temperature measuring module 281 (… Figure 22 (As shown in the dashed box) The temperature measuring module 281 is disposed on the bottom surface of the first groove 211. For example, it can be embedded in the bottom surface of the first groove 211 to contact the battery and measure its temperature, as the battery temperature before and after a drop test is an important indicator of safety. The type of temperature measuring module 281 can be selected as needed; for example, it can be a type K thermocouple. The temperature display 282 is disposed on the second surface 210b, for example, it can be embedded in the second surface 210b. The temperature display 282 can be displayed via wiring arranged within the main body plate 210. Figure 22 (As shown by the dashed line) It is electrically connected to the temperature measurement module 281 to display the measured temperature of the battery, so that testers can understand the temperature changes of the battery and assess the safety of the battery.

[0136] Further, please refer to Figure 23 , Figure 23 The adoption of the embodiments provided in this application Figure 22 The diagram shows the structure of the test fixture 200 on the main body plate 210. Since the second counterweight 250 of the test fixture 200 is stacked on the second surface 210b, and the temperature display 282 of the temperature measuring component 280 is also disposed on the second surface 210b, a cutout 252 is provided on the second counterweight 250 to avoid obstructing the temperature display 282. The projection of the temperature display 282 onto the surface of the second counterweight 250 is located within the cutout 252, allowing the tester to observe the displayed data of the temperature display 282 through the cutout 252.

[0137] This application also provides a testing apparatus 300, please refer to... Figure 24 , Figure 24A structural schematic diagram of a test device 300 provided by an embodiment of the present application is shown. The test device 300 comprises the aforementioned test fixture 200, and other components for performing drop tests on the test fixture 200, which specifically include a support 310, a lifting mechanism 320, and an impact member 330. The support 310 comprises a base 311 and a support column 312 fixed to the base 311. The lifting mechanism 320 is arranged on the support column 312 and can vertically lift along the support column 312, and is used to carry the test fixture 200 to lift the test fixture 200 to a predetermined test height. The impact member 330 is fixed on the base 311 and below the lifting mechanism 320, and has a sharp conical portion 331 facing the upward lifting mechanism 320, which is used to impact the dropped test fixture 200, wherein the conical portion 331 is to simulate sharp objects (such as gravel on the ground, edges and corners of buildings and furniture, etc.) in the actual use scenario of the mobile terminal 100.

[0138] Exemplarily, the lifting mechanism 320 can carry the test fixture 200 through a horizontal platform composed of two movable plates (not shown in the figure). When the lifting mechanism 320 lifts the test fixture 200 to the predetermined test height, the two movable plates can be translated in a direction away from each other, or the two movable plates can be released from supporting the test fixture 200 by rotating downward, so as to release the test fixture 200 and make the test fixture 200 freely drop. Of course, the lifting mechanism 320 can also directly use a clamping structure such as a clamp or a gripper to clamp the test fixture 200, and by controlling the action of the clamping structure to release the test fixture 200, the test fixture 200 can be made to freely drop. Figure 24

[0139] In some embodiments, please continue to refer to Figure 24 The test device 300 further comprises a positioning assembly 340, which can be fixed on the support column 312 and above the lifting mechanism 320, or can be fixed on the lifting mechanism 320 and above the test fixture 200. The positioning assembly 340 is used to position the test fixture 200 on the lifting mechanism 320, so that the projection of a predetermined test point on the test fixture 200 in the vertical direction falls on the conical portion 331.

[0140] Exemplarily, the positioning principle of the positioning assembly 340 is that the positioning assembly 340 can emit a beam of laser light to the direction of the impact member 330, and the irradiation point of the laser light on the impact member 330 is located on the conical portion 331. After the test fixture 200 is placed on the lifting mechanism 320, the same beam of laser light of the positioning assembly 340 irradiates on the test fixture 200, and the position of the test fixture 200 is adjusted so that the irradiation point of the laser light coincides with the test point of the test fixture 200, that is, the positioning of the test fixture 200 is completed. ​

[0141] Further, for the case that the predetermined test point is located on the back cover 220 of the test fixture 200, a reference point is marked on the surface of the side of the test fixture 200 away from the back cover 220 (i.e. the second surface 210b, or the surface of the second counterweight 250 arranged on the main plate 210), which coincides with the projection of the test point in the thickness direction of the test fixture 200. The test fixture 200 is placed in the lifting mechanism 320 with the back cover 220 facing down, and the position of the test fixture 200 is adjusted so that the irradiation point of the laser of the positioning assembly 340 on the test fixture 200 coincides with the reference point, i.e. the positioning of the test fixture 200 is completed.

[0142] The embodiments of the present application also provide a test method applied to the test device 300, which comprises the following steps:

[0143] S301: mounting the battery in the first recess 211 of the test fixture 200.

[0144] Specifically, the first recess 211 is first pasted with an adhesive, then the battery is mounted in the first recess 211, and then auxiliary materials (such as graphite sheets) are mounted to simulate the mounting state of the battery in the mobile terminal. In addition, the auxiliary materials can also include a wireless coil, so that the battery in the first recess 211 can be wirelessly charged. Of course, the battery in the first recess 211 can also be charged in a wired charging manner through the charging interface arranged at the first recess 211. According to needs, the battery can also be charged in advance before being placed in the first recess 211.

[0145] It should be noted that according to the test needs, the battery can be tested in a no-power state (the power is equal to zero) or a power-on state (the power is greater than zero) to simulate different use cases of the mobile terminal 100.

[0146] S302: adjusting the number and distribution position of the counterweights on the test fixture 200 so that the total weight of the test fixture 200 and the battery is the same as the weight of the mobile terminal, and the distance between the center of gravity of the test fixture 200 and the geometric center of the test fixture 200 is less than or equal to 5mm.

[0147] It can be understood that the adjustment of the center of gravity of the test fixture 200 is mainly achieved by adjusting the distribution of the first weight 230 among the weights. The adjustment of the total weight of the test fixture 200 and the battery is mainly achieved by adjusting the number of the first weight 230 and the second weight 250 among the weights. In addition, the test fixture 200 is in a rectangular structure as a whole, and the position of the geometric center, i.e., the intersection of two diagonal lines, is fixed. The distance between the position of the center of gravity and the position of the geometric center is determined, and the position of the center of gravity is determined. The method for determining the position of the center of gravity can be determined by the known suspension method or the support method, which will not be described here.

[0148] S303: Install the test fixture 200 on the lifting mechanism 320, so that the rear cover 220 of the test fixture 200 faces the collision member 330, and the test point on the rear cover 220 and the conical part 331 of the collision member 330 are distributed along the vertical direction.

[0149] Specifically, after the test fixture 200 is installed on the lifting mechanism 320, the rear cover 220 of the test fixture 200 faces the collision member 330 below, and then the position of the test fixture 200 is adjusted. According to the positioning principle of the positioning assembly 340, the test fixture 200 is positioned by the positioning assembly 340, so that the test point on the rear cover 220 is aligned with the conical part 331 of the collision member 330.

[0150] S304: After the test fixture 200 is lifted to a predetermined height by the lifting mechanism 320, the test fixture 200 is released, so that the test point hits the conical part 331.

[0151] Specifically, the lifting mechanism 320 releases the support of the test fixture 200, and the test fixture 200 is released. The specific manner can refer to the content of the lifting mechanism 320 part in the foregoing test device 300 embodiment. Since the test fixture 200 is adjusted by the weight, the center of gravity of the test fixture 200 is basically coincided with the geometric center, so that the test fixture 200 is released and falls in the posture of the rear cover 220 facing the collision member 330, and falls stably to the collision member 330, so as to reach the purpose of controllable falling posture, and the test point can be guaranteed to hit the conical part 331 accurately.

[0152] Through steps S301 to S304, the drop test on the test fixture 200 can be completed. The tested battery needs to be rested for a period of time (for example, 5 minutes), and the temperature needs to be reduced to a safe temperature (for example, 30 DEG C). For the battery in the electric state, after being rested, the battery needs to be put into the explosion-proof box for discharging. Subsequently, the safety of the battery in the drop scene can be evaluated according to the drop test result. For example, the safety of the battery can be evaluated according to the temperature and deformation of the battery after the drop test. At the same time, according to the safety evaluation of the battery, in combination with the deformation of the back cover 220 after the back cover 220 hits the collision piece 330, the effectiveness of the back cover 220 in protecting the battery can be evaluated.

[0153] In the description of the present specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0154] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A test fixture for performing safety tests on the batteries of mobile terminals, characterized in that, The test fixture comprises: a main plate having a first surface and a second surface distributed along a first direction, the first direction being a thickness direction of the main plate, the first surface being provided with a first recess for placing the battery, the second surface being provided with a plurality of spaced-apart counterweight holes; a back cover stacked on the first surface and covering the first recess, the back cover being detachably connected with the main plate; a plurality of first counterweight members detachably connected with at least part of the plurality of counterweight holes; the plurality of counterweight holes include a plurality of first counterweight holes and a plurality of second counterweight holes, the first counterweight holes being located within a coverage range of a vertical projection of a groove bottom surface of the first recess on the second surface, the second counterweight holes being located outside the coverage range of the vertical projection of the groove bottom surface of the first recess on the second surface; the second counterweight holes penetrate the main plate along the thickness direction of the main plate, the back cover being provided with a plurality of first connecting holes penetrating the back cover along the first direction, the plurality of first connecting holes and the plurality of second counterweight holes being one-to-one correspondingly arranged and communicated; wherein at least part of the first counterweight members are arranged in the second counterweight holes and the first connecting holes that are communicated with each other, and the first counterweight members connect the back cover and the main plate.

2. The test fixture of claim 1, wherein, The first counterweight holes are blind holes.

3. The test fixture of claim 1 or 2, wherein, The back cover is provided with a plurality of second connecting holes penetrating the back cover along the first direction, the first surface is provided with a plurality of third connecting holes spaced apart from the first recess, the plurality of third connecting holes and the plurality of second connecting holes are one-to-one correspondingly arranged and communicated; wherein the test fixture further comprises a plurality of connecting members, the plurality of connecting members are respectively arranged in the second connecting holes and the third connecting holes that are communicated with each other, and the back cover and the main plate are fixedly connected through the connecting members.

4. The test fixture of claim 3, wherein, The third connecting holes penetrate the main plate along the first direction, and the connecting members include first ends fitted in the third connecting holes; wherein in the first direction, a distance between the first ends and the first surface is less than or equal to a distance between the first surface and the second surface.

5. The test fixture of claim 1 or 2, wherein, The counterweight holes are threaded holes, the first counterweight members are provided with external threads, and the first counterweight members are threadedly connected with the counterweight holes.

6. The test fixture of claim 1 or 2, wherein, The plurality of first counterweight members have different masses.

7. The test fixture of claim 1 or 2, wherein, Further comprising: at least one second counterweight member stacked on the second surface along the first direction, the second counterweight member being provided with a plurality of fourth connecting holes penetrating the second counterweight member along the first direction, the plurality of fourth connecting holes and the plurality of counterweight holes being one-to-one correspondingly arranged and communicated; wherein the first counterweight members are arranged in the fourth connecting holes and the counterweight holes that are communicated with each other, and the first counterweight members connect the second counterweight member and the main plate.

8. The test fixture of claim 7, wherein, The second counterweight member and the main plate are coincident in projection on a plane where the first surface is located.

9. The test fixture of claim 1 or 2, wherein, The first surface is further provided with a second groove, the second groove is spaced apart from the first groove along a second direction, the second direction is a length direction of the main plate, and part of the counterweight holes are located in a coverage range of a vertical projection of a groove bottom surface of the second groove on the second surface.

10. The test fixture of claim 1 or 2, wherein, The first groove is provided with a stop block and an adjusting member, one end of the adjusting member is connected to the stop block, the other end is connected to a groove wall of the first groove, and the adjusting member is used to move the stop block in a direction parallel to the first surface, so that the battery is abutted between the stop block and the groove wall of the first groove.

11. The test fixture of claim 10, wherein, The adjusting member is a spring.

12. The test fixture of claim 10, wherein, The adjusting member is a threaded fastener, the groove wall is provided with an adjusting screw hole, and the adjusting member is screwed with the adjusting screw hole.

13. The test fixture of claim 12, wherein, The adjusting member is rotationally connected with the stop block.

14. The test fixture of claim 12, wherein, The adjusting member is fixedly connected with the stop block.

15. The test fixture of claim 12, wherein, The main plate has a side surface, the side surface is spaced apart from the groove wall in a direction parallel to the first surface, and the adjusting screw hole penetrates to the side surface in a direction parallel to the first surface and away from the first groove.

16. The test fixture of claim 12, wherein, The first surface is further provided with a second groove, the second groove is spaced apart from the first groove along a second direction, the second direction is a length direction of the main plate, and part of the counterweight holes are located in a coverage range of a vertical projection of a groove bottom surface of the second groove on the second surface. The first groove is provided with a stop block and an adjusting member, one end of the adjusting member is connected to the stop block, the other end is connected to a groove wall of the first groove, and the adjusting member is used to move the stop block in a direction parallel to the first surface, so that the battery is abutted between the stop block and the groove wall of the first groove.

17. The test fixture of claim 10, wherein, The first groove has two first groove walls distributed along a second direction and two second groove walls distributed along a third direction, the second direction is a length direction of the main plate, and the third direction is a width direction of the main plate. The stop block includes a first stop block and a second stop block, and the adjusting member includes a first adjusting member and a second adjusting member, the first stop block is connected to the first groove wall through the first adjusting member, and the second stop block is connected to the second groove wall through the second adjusting member. The first adjusting member is used to move the first stop block along the second direction, and the second adjusting member is used to move the second stop block along the third direction.

18. The test fixture of claim 1 or 2, wherein, Further comprising: A temperature measurement assembly includes a temperature measurement module and a temperature display that are electrically connected to each other, the temperature measurement module is arranged on the groove bottom surface of the first groove and is used to contact the battery to measure the temperature, and the temperature display is arranged on the second surface.

19. The test fixture of claim 18, wherein, The second surface is stacked with at least one second counterweight member, the second counterweight member is provided with a hollow opening, and along the first direction, a projection of the temperature display on a surface of the second counterweight member is located in the hollow opening.

20. A test device, characterized by Comprising: The test fixture of any one of claims 1 to 19; A support; A lifting mechanism mounted on the support, the lifting mechanism is used to carry the test fixture; A collision member arranged below the lifting mechanism, the collision member includes a cone portion used to impact the test fixture.

21. The test device of claim 20, wherein, Further comprising: A positioning component is arranged to position the test fixture on the lifting mechanism so that the projection of the cone portion on the surface of the test fixture is located at the test point of the test fixture.

22. A test method characterized by, The test method is applied to the test device as claimed in claim 20 or 21, and comprises: mounting the battery in the first recess of the test fixture; adjusting the number and distribution of the counterweights on the test fixture so that the total weight of the test fixture and the battery is the same as the weight of the mobile terminal, and the distance between the center of gravity of the test fixture and the geometric center of the test fixture is less than a preset distance; mounting the test fixture on the lifting mechanism so that the back cover of the test fixture faces the impact component, and the test point on the back cover and the cone portion of the impact component are distributed along the vertical direction; controlling the lifting mechanism to lift the test fixture to a predetermined height, and then releasing the test fixture so that the test fixture freely falls to make the test point impact the cone portion.

23. The test method of claim 22, wherein, The preset distance is less than or equal to 5 mm.

Images