Test box convenient for taking and placing mobile phone

Abstract

The utility model provides a test box convenient for taking and placing a mobile phone, and aims to solve the technical problem that the existing test box is low in test efficiency. A clamping device is arranged on the outer wall of a support; the support slides into or out of the test box, and the clamping device faces the rear side of the test box. A limiting protruding block is arranged in a shell of the locking assembly. The moving part is matched with the clamping device and installed in the shell, the moving distance of a moving block of the moving part in the shell is limited by a limiting protruding block, one end of a spring extends into the moving block, and the other end of the spring is installed at the bottom end of the shell. One end of the rotating rod is connected to the end face of the spring and is not coaxial with the spring, and the other end extends out of the moving block; the guide block is mounted in the shell; the guide block is provided with a guide channel; the support is pushed to abut against the moving part to the innermost part of the shell for the first time and then loosened, and the other end of the rotating rod rotating in cooperation with the spring is clamped in the guide channel; and the other end of the rotating rod passes through the guide channel, so that the bracket can be conveniently taken and placed at the test box.

Description

Technical Field

[0001] This application relates to the field of mobile phone testing equipment, and more particularly to a testing box that facilitates the handling of mobile phones. Background Technology

[0002] With the continuous expansion of mobile phone functions and the constant improvement of performance, ensuring the stability, reliability, and high performance of mobile phones in various complex scenarios has become a crucial link in the mobile phone research and development and production process. Mobile phone testing, as a key process to ensure mobile phone quality, places extremely high demands on testing equipment and auxiliary tools. Traditional mobile phone test boxes typically have a mobile phone fixing platform inside. For example, the utility model patent application number CN202221382656.0 discloses a fixing platform structure integrated with the test box for whole-device shielding testing of mobile phones. The phone is fixed by sliding the fixing platform structure outwards, and then the fixing platform structure is slid inwards into the box for testing. However, the installation of the fixing platform in this type of test box occupies space, resulting in only one phone being tested at a time. Furthermore, technicians need to remove the phone from the fixing platform and place another phone back on the fixing platform before the next test can be performed, reducing testing efficiency. Utility Model Content

[0003] To address the aforementioned issues, this application provides a test box that facilitates the handling of mobile phones, comprising:

[0004] A bracket for placing a mobile phone is provided on its outer wall; the bracket slides into or out of the test box, and the bracket faces the rear side of the test box.

[0005] A locking component, which is fitted into the test chamber by matching the locking device, includes a housing, a moving part, and a guide block;

[0006] The housing is provided with a limiting protrusion inside;

[0007] The moving component includes a moving block and a rotating rod;

[0008] The moving block's movement distance within the housing is limited by the limiting protrusion, which has one end of a spring extending inside it, and the other end of the spring is mounted on the bottom of the housing.

[0009] The rotating rod has one end connected to the end face of the spring and is not coaxial with the spring, and the other end extends outside the moving block;

[0010] The guide block is installed inside the housing and has a guide channel. When the bracket is pushed to move into the housing for the first time, it is released and the other end of the rotating rod that rotates with the spring is locked in the guide channel. When the above pushing is repeated for the second time, it is released and the other end of the rotating rod passes through the guide channel.

[0011] Furthermore, the bracket is formed by the first side plate assembly, the second side plate assembly, and the base plate into a cuboid structure with one open side;

[0012] The first side panel assembly has two side panels that are arranged opposite each other to match the width of the mobile phone;

[0013] The second side panel assembly has two side panels that are arranged opposite each other to match the length of the mobile phone, and a locking device is provided on the outer wall of one side panel;

[0014] The base plate is connected to the same side of the first side plate group and the second side plate group.

[0015] Furthermore, the test box, which facilitates the handling of mobile phones, has an upper guide plate and a lower guide plate on its upper and lower inner walls, respectively; a sliding groove group is opened on the opposite surface of the two guide plates; a corner groove matching the sliding groove is opened on each of the two side plates of the first side plate group, so that the groove edge of the bracket corner groove is slidably connected to the groove edge.

[0016] Furthermore, the outer wall of the second side panel assembly, which has a locking device, is also provided with a positioning block.

[0017] Furthermore, the two protective plates are fixed to the guide plates adjacent to them respectively; the distance between the two protective plates is set to match the positioning block, and the distance from each protective plate to the entrance of the test box is set to match the length of the first side plate, so that when the bracket slides along the slide groove into the test box until the positioning block at one end of the bracket is engaged between the two protective plates, the other end of the bracket is exposed outside the test box; each protective plate is provided with a group of positioning holes to match the locking device.

[0018] Furthermore, the housing includes a fixed cylinder and a connecting plate;

[0019] The fixing cylinder is a cuboid structure with one open end facing the entrance of the test chamber; the fixing cylinder has a first hole and a second hole coaxially and sequentially opened from the inside to the outside, the diameter of the first hole is smaller than the diameter of the second hole, and a limiting protrusion is provided at the bottom of the second hole;

[0020] The connecting plate is fixed to the outer wall of the fixed cylinder.

[0021] Furthermore, a spring is inserted into the movable block; a rotating hole is provided on one side of the movable block, and a limiting groove is provided on the inner wall of the rotating hole; the movable block is matched and placed in the first hole, so that the movable block is suspended in the fixed cylinder.

[0022] Furthermore, the rotating rod includes a limiting part and a rotating part;

[0023] The limiting part has one end extending into the moving block and connected to the end of the spring. The spring and the limiting part are not coaxial. A limiting space is left between the wall surface of the limiting part facing the second hole and the rotating hole to limit the circumferential rotation of the limiting part. The outer wall of the limiting part is provided with a protruding edge that matches the limiting groove to limit the axial movement of the limiting part at the rotating hole.

[0024] The rotating part is fixed at one end to the other end of the limiting part, and its other end extends outward from the fixed cylinder.

[0025] Furthermore, the locking assembly also includes an elastic block, which comprises a pressure block and an elastic arm;

[0026] The pressure block is fixed to the outer wall of the movable block facing outward from the fixed cylinder, and the size of the pressure block gradually decreases from the inside to the outside of the fixed cylinder;

[0027] The elastic arms are obliquely positioned on both sides of the pressure block to match the second hole; each elastic arm has an arc-shaped structure on the outer edge facing the wall of the second hole.

[0028] Furthermore, the guide block has an intersecting first inclined surface and a second inclined surface facing outward from the fixed cylinder; the guide channel is composed of a first inclined channel, a second inclined channel and a third inclined channel from left to right, the first inclined channel extends obliquely outward from the fixed cylinder, the second inclined channel extends obliquely inward to the bottom end of the fixed cylinder, and the third inclined channel extends obliquely outward from the fixed cylinder; the guide block is mounted on the wall of the fixed cylinder away from the spring through a support plate.

[0029] Compared with the prior art, the beneficial effects of this utility model are:

[0030] The bracket's corner groove and the test chamber's sliding groove work together to stably insert the bracket into the test chamber. Furthermore, the locking mechanism and locking components work together, allowing the operator to simply push the locking mechanism into the test chamber until it engages with the locking component, thus locking or releasing the bracket. This enables quick placement and removal of the bracket containing the phone within the 3U chassis, significantly improving the efficiency of phone testing. In addition, the test chamber has a simple structure and can test multiple phones simultaneously. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a front view schematic diagram of a test box containing a bracket that facilitates the placement and removal of a mobile phone, according to an embodiment of this application.

[0033] Figure 2 This is a rear view schematic diagram of a test box that facilitates the handling of mobile phones, according to an embodiment of this application.

[0034] Figure 3 This is a schematic diagram of a support structure for a test box that facilitates the placement and removal of mobile phones, according to an embodiment of this application.

[0035] Figure 4 This is a schematic diagram of the internal structure of the fixing cylinder of a test box that facilitates the handling of mobile phones, according to an embodiment of this application.

[0036] Figure 5 This is a side view of the rotating rod of a test box that facilitates the handling of mobile phones, according to an embodiment of this application.

[0037] Figure 6 This is a rear view schematic diagram of the rotating rod of a test box that facilitates the handling of mobile phones, according to an embodiment of this application.

[0038] Figure label:

[0039] 1. Bracket; 10a. Second side plate assembly; 10b. First side plate assembly; 100. Corner groove; 101. Groove edge of corner groove; 11. Base plate; 110. Positioning block; 120. Mounting block; 1210. Contact part; 1211. Extension part;

[0040] 20. Box body; 21. Guide plate; 210. Slide groove; 22. Protective plate; 220. Positioning hole;

[0041] 3. Mounting unit; 300. Fixing cylinder; 3000. Rotating hole; 301a. Second hole; 301b. First hole; 302. Limiting protrusion; 303. Connecting plate;

[0042] 31. Rotating rod; 310. Limiting part; 3100. Protruding edge; 311. Rotating part;

[0043] 320. Moving block; 321. Spring; 330. Pressure block; 331. Elastic arm; 34. Guide block; 340. Support plate; 341a. First inclined channel; 341c. Third inclined channel; 342a. First inclined surface; 342b. Second inclined surface; 35. Mounting rod; 36. Stabilizing plate; 360. Stabilizing hole. Detailed Implementation

[0044] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0045] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "circumferential", "axial", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] The following disclosure provides many different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0050] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0051] This utility model embodiment provides a test box that facilitates the handling of mobile phones. Please refer to [reference needed]. Figures 1-6 The test box, which facilitates the handling of mobile phones, includes a bracket 1, a box unit, and a mounting unit 3.

[0052] Specifically,

[0053] The bracket 1 includes a frame and a locking device. Preferably, the locking device is located on the same outer side wall of the frame.

[0054] The frame is a cuboid structure formed by a first side panel assembly 10b, a second side panel assembly 10a, and a perforated bottom plate, with a placement opening on one side. The two side panels of the first side panel assembly 10b are oriented opposite each other to match the width of the phone, and the two side panels of the second side panel assembly 10a are oriented opposite each other to match the length of the phone, allowing the phone to be placed into the frame through the placement opening and securely held by the frame. A corner groove 100 is provided on each of the two side panels of the first side panel assembly 10b. A positioning block 110 is provided on the outer wall of one of the side panels of the second side panel assembly 10a.

[0055] A positioning device is provided opposite to the outer wall of one of the side panels of the second side panel assembly 10a. A positioning block 110 is located between the two positioning devices. The positioning device is fixed to the outer wall of the frame by bolts to the mounting block 120 and the second side panel. The positioning device extends along the length of the mobile phone and includes an extension portion 1211 and a contact portion 1210. The extension portion 1211 is fixed to the mounting block 120; the contact portion 1210 is fixed to the extension portion 1211.

[0056] The housing unit, used for testing mobile phones, includes a housing body 20, a guide plate 21, and a protective plate 22.

[0057] The housing body 20 has an opening on at least one side, allowing the support 1 to enter the housing body 20 from the opening side.

[0058] The housing unit is placed on the workbench, with two guide plates 21 positioned vertically opposite each other on the inner wall of the housing body. Slide grooves are respectively provided on the opposing surfaces of the two guide plates, meaning each of the upper and lower slide groove groups corresponds one-to-one. Simultaneously, each slide groove group is slidably connected to the groove edge 101 of a bracket's corner groove. That is, each bracket 1 can slide smoothly into or out of the housing body 20 via the groove edges 101 of its two corner grooves at the slide groove 210, allowing it to smoothly enter or exit the housing body 20. Furthermore, multiple brackets can be placed inside the housing body 20 for testing.

[0059] Protective plates 22 are installed inside the housing body, and two protective plates 22 are fixed to their adjacent guide plates 21. The protective plates 22 are connected to the housing body. The distance between the two protective plates is matched with the positioning block 110, and the distance from each protective plate 22 to the entrance end of the housing body is matched with the length of the first side plate, so that when the bracket 1 slides along the slide groove 210 into the housing body until the positioning block 110 at one end is engaged between the two protective plates 22, the other end of the bracket protrudes outside the housing body. Each protective plate 22 is provided with a positioning hole group matched with a locking device, so that each locking device of the bracket 1 that slides into the housing body along the slide groove 210 can pass through the corresponding positioning hole 220.

[0060] Move bracket 1 along slide groove 210 into the housing body until positioning block 110 is engaged between two protective plates 22. At this time, the positioning device passes through positioning hole 220.

[0061] Mounting unit 3 includes a locking assembly, a mounting rod 35, and a stabilizing plate 36. The locking assembly is fixed to the housing body in conjunction with the mounting rod 35 and the stabilizing plate 36. The locking assembly is located within the housing body and matches the positioning holes 220; that is, the number of locking assemblies is the same as the number of positioning holes 220. Each locking assembly includes a housing, a moving part, and a guide block 34.

[0062] The housing includes a connecting plate 303 and a fixing cylinder 300. The connecting plate 303 is fixed to the outer wall of the fixing cylinder. The fixing cylinder 300 is a cuboid structure with one open end facing the positioning hole. A first hole 301b and a second hole 301a are coaxially and sequentially opened from the inside to the outside of the fixing cylinder 300. The diameter of the first hole 301b is smaller than the diameter of the second hole 301a. A limiting protrusion 302 is provided at the bottom of the second hole 301a.

[0063] The movable component includes a movable block 320, a rotating rod 31, and an elastic block. The movement distance of the movable block 320 within the fixed cylinder is limited by a limiting protrusion 302. One end of a spring 321 extends into the movable block, and the other end of the spring is mounted at the bottom of the first hole. A rotating hole 3000 is provided on one side of the movable block 320, and a limiting groove is provided on the inner wall of the rotating hole. The movable block 320 is fitted into the first hole 301b, so that the movable block 320 is suspended within the fixed cylinder. The rotating rod 31 includes a limiting part 310 and a rotating part 311. One end of the limiting part extends into the movable block and is in contact with the end face of the spring. The spring 321 and the limiting part 310 are not coaxial. The rotating part 311 is located on the outside of the movable block, with one end fixed to the limiting part 310 and the other end extending outward from the fixed cylinder. A limiting space is provided between the wall surface of the limiting part 310 facing the second hole 301a and the rotating hole to limit the circumferential rotation range of the limiting part 310; the outer wall of the limiting part 310 is provided with a protruding edge 3100 that matches the limiting groove to limit the axial movement of the limiting part 310 at the rotating hole. Preferably, the rotating hole 3000 and the limiting part 310 have a semi-cylindrical structure.

[0064] The elastic block includes a pressure block 330 and elastic arms 331. The pressure block 330 is fixed to the movable block 320 facing outward from the fixed cylinder. The size of the pressure block 330 gradually decreases from the inside to the outside of the fixed cylinder 300. The pressure block 330 is matched with a locking device so that the contact portion 1210 through the positioning hole 220 can abut against the pressure block 330, thereby driving the movable block 320 to move into the fixed cylinder. The elastic arms 331 are matched with the second hole 301a and are obliquely opposite to both sides of the pressure block 330, so that when the movable block 320 moves into the fixed cylinder, the elastic arms 331 can enter the second hole and be squeezed by the inner wall of the second hole. Each elastic arm 331 has an arc-shaped structure on its outer edge facing the wall of the second hole.

[0065] When the bracket 1 is moved into the housing body, the locking device passing through the positioning hole 220 abuts against the pressure block 330, thereby driving the moving block 320 to move into the fixed cylinder, while the limiting part 310 compresses the spring 321.

[0066] The guide block 34 has a first inclined surface 342a and a second inclined surface 342b on its outer wall facing the fixed cylinder, and the two inclined surfaces intersect. When the locking device moves into the fixed cylinder body by abutting against the pressing block 330, the limiting part 310 rotates and adjusts within the rotating hole, while its other end moves into the fixed cylinder along the first inclined surface 342a. The guide block 34 has a guide channel. This guide channel consists of a first inclined channel 341a, a second inclined channel, and a third inclined channel 341c from left to right. The first inclined channel 341a extends obliquely outward from the fixed cylinder, the second inclined channel extends obliquely into the bottom end of the fixed cylinder, and the third inclined channel 341c extends obliquely outward from the fixed cylinder. The guide block 34 is mounted to the fixed cylinder 300 via a support plate 340 on its wall facing away from the spring 321.

[0067] When the locking device abuts against the pressure block 330 and moves into the fixed cylinder until the spring 321 is compressed, the other end of the rotating part moves into the first inclined channel 341a. At this time, when the locking device no longer abuts against the pressure block 330, the length of the spring 321 recovers, causing the other end of the rotating part to move out of the fixed cylinder and lock into the junction of the first inclined channel 341a and the second inclined channel. Then, the locking device abuts against the pressure block 330 and compresses the spring 321. The other end of the rotating part moves along the second inclined channel to the junction of the second inclined channel and the third inclined channel 341c. At this time, when the locking device no longer abuts against the pressure block 330, the elastic force of the spring 321 recovers, causing the other end of the rotating part to move along the third inclined channel 341c back to the initial position.

[0068] Mounting rod 35 is connected to one side of the connecting plate and fixed to the fixing cylinder 300. Both ends of the mounting rod 35 are fixed to the box body 20.

[0069] The stabilizing plate 36 is fixed to the housing body 20, connected to the other side of the connecting plate, and bolted to the connecting plate 303. The stabilizing plate 36 has a stabilizing hole 360 ​​that matches the fixing cylinder 300, so that the open end of the fixing cylinder is located in the stabilizing hole 360.

[0070] Based on the above embodiments, the working principle of this application is as follows:

[0071] Place the phone inside the bracket 1, and push the bracket 1 along the slide groove 210 into the housing body until the positioning block 110 is engaged between the two protective plates 22. At this time, the locking device passes through the positioning hole 220 and abuts against the pressure block 330 in the direction of the fixed cylinder. The spring is compressed until the other end of the rotating part slides along the first inclined surface 342a into the first inclined channel 341a. After releasing, the spring 321 returns to its original length, causing the other end of the rotating part to engage at the junction of the first inclined channel 341a and the second inclined channel. At this time, the locking installation of the bracket 1 in the test box is completed.

[0072] After the test is completed, press the bracket 1 towards the inside of the housing body, so that the locking device abuts against the pressure block 330 again. The spring is compressed until the other end of the rotating part moves along the second inclined channel to the junction of the second inclined channel and the third inclined channel 341c. Release the spring 321 to restore its original length, causing the other end of the rotating part to move along the third inclined channel 341c back to the initial position, so that the bracket 1 is popped out.

[0073] Based on the above embodiments, the advantages of this application are:

[0074] The bracket 1 can be stably inserted into the test chamber through the cooperation of the bracket corner groove 100 and the test chamber slide groove 210. Furthermore, the locking mechanism and locking component allow the operator to lock or release the bracket 1 simply by pushing the locking mechanism into the test chamber until it engages with the locking component. This enables quick placement and removal of the bracket containing the mobile phone within the 3U chassis, significantly improving the efficiency of mobile phone testing. In addition, the test chamber has a simple structure and can test multiple mobile phones simultaneously.

Claims

1. A test box for facilitating the taking and placing of a mobile phone, characterized in that, It includes: Support for mobile phone placement, its outer wall is provided with a detent; the support slides into or out of the test box, and the detent is towards the rear side of the test box; Locking assembly, matching the detent, is installed in the test box, including a housing, a moving piece and a guide block; The housing is provided with a limiting protrusion inside; The moving piece includes a moving block and a rotating rod; The moving distance of the moving block in the housing is limited by the limiting protrusion, one end of the spring is inserted into the moving block, and the other end of the spring is installed at the bottom end of the housing; The rotating rod is provided at one end of the spring end face and coaxially with the spring, and the other end extends out of the moving block; The guide block is installed in the housing and is provided with a guide channel; after the support is pushed against the moving piece and moves into the housing for the first time, the other end of the rotating rod is clamped in the guide channel; after the above-mentioned pushing and loosening is repeated for the second time, the other end of the rotating rod passes through the guide channel.

2. The test box for facilitating the pick and place of a handset of claim 1, wherein: The support is surrounded by a first side plate group, a second side plate group and a bottom plate to form a long rectangular structure with one side open; The first side plate group is provided with two side plates which are matched with the width of the mobile phone and are arranged opposite to each other; The second side plate group is provided with two side plates which are matched with the length of the mobile phone and are arranged opposite to each other, and one side plate is provided with a detent on the outer wall; The bottom plate is connected to the same side of the first side plate group and the second side plate group.

3. The test box for facilitating the pick and place of a handset of claim 2, wherein, The upper and lower inner walls are respectively provided with an upper guide plate and a lower guide plate; the opposite surfaces of the two guide plates are respectively provided with a slide groove group; the two side plates of the first side plate group are respectively provided with a corner groove matched with the slide groove, so that the groove of the corner groove of the support is connected to the groove along the slide.

4. The test box for facilitating the pick and place of a handset of claim 3, wherein: The outer wall of the second side plate group provided with the detent is also provided with a positioning block.

5. The test case of claim 4, wherein, It also includes two protection plates which are respectively fixed to the guide plates adjacent thereto; the distance between the two protection plates is matched with the positioning block; the distance from each protection plate to the inlet end of the test box is matched with the length of the first side plate, so that when the support slides along the slide groove into the test box and the positioning block provided at one end of the support is clamped between the two protection plates, the other end of the support is exposed outside the test box; each protection plate is provided with a positioning hole group matched with the detent.

6. The test case of any one of claims 4 or 5, wherein: The housing includes a fixed cylinder and a connecting plate; The fixed cylinder is a long rectangular structure with one side open, and the open end is towards the inlet end of the test box; the first hole and the second hole are coaxially and sequentially provided in the fixed cylinder from inside to outside, and the first hole is smaller in diameter than the second hole; the second hole is provided with a limiting protrusion at the bottom; The connecting plate is fixed to the outer wall of the fixed cylinder.

7. The test case of claim 6, wherein: One end of the spring is inserted into the moving block; one side of the moving block is provided with a rotating hole, and the inner wall of the rotating hole is provided with a limiting groove; the moving block is matched with the first hole, so that the moving block is suspended in the fixed cylinder.

8. The test case of claim 7, wherein: The rotating rod includes a limiting portion and a rotating portion; One end of the limiting portion is inserted into the moving block and connected to the end of the spring, and the spring is coaxially arranged with the limiting portion; the limiting space is left between the wall surface of the limiting portion towards the second hole and the rotating hole, so as to limit the circumferential rotation amplitude of the limiting portion; the limiting portion is provided with a convex edge matched with the limiting groove, so as to limit the axial movement of the limiting portion at the rotating hole; The other end of the rotating portion is fixed to the limiting portion, and the other end thereof extends towards the outside of the fixed cylinder.

9. The test case of claim 8, wherein: The locking assembly further comprises an elastic block, which comprises a pressing block and elastic arms; The pressing block is fixed to the outer wall of the moving block and gradually decreases in size from the inside to the outside of the fixed cylinder; The elastic arms are obliquely arranged on both sides of the pressing block and match the second holes; each elastic arm is provided with an arc structure towards the outer edge of the hole wall of the second hole.

10. The test case of claim 9, wherein: The guide block is provided with intersecting first and second inclined surfaces towards the outside of the fixed cylinder; the guide channel is composed of a first inclined channel, a second inclined channel and a third inclined channel from left to right; the first inclined channel extends obliquely towards the outside of the fixed cylinder; the second inclined channel extends obliquely towards the bottom end of the fixed cylinder; the third inclined channel extends obliquely towards the outside of the fixed cylinder; the wall surface of the guide block away from the spring is installed on the fixed cylinder through a support plate.

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