Detection jig

Abstract

The application relates to the technical field of processing detection, in particular to a detection jig. The detection jig comprises a supporting assembly, a supporting plate of the supporting assembly, a plurality of material placing holes in the supporting plate, a rotating assembly, a plurality of rotating shafts, a plurality of material loading parts, a plurality of swing arms and a connecting rod, each rotating shaft is rotationally connected to the supporting plate, each rotating shaft is arranged close to the same side of the material placing hole, the plurality of material loading parts are arranged one by one at the bottom of the plurality of material placing holes and are connected to the corresponding rotating shafts, the material loading parts are used for carrying workpieces, the plurality of swing arms are connected to the end portions of the plurality of rotating shafts, the connecting rod is connected to the plurality of swing arms, the connecting rod is used for driving the plurality of swing arms to rotate, so as to drive the rotating shafts and the material loading parts to rotate, and then the position degree of the workpieces is adjusted, and a plurality of stop pieces are connected to the supporting plate, and the stop pieces are used for stopping the workpieces. The detection jig is convenient for detecting the inclined surfaces of the workpieces, is simple to operate, has low labor intensity and can guarantee detection consistency.

Description

Technical Field

[0001] This application relates to the field of processing and testing technology, specifically to a testing fixture. Background Technology

[0002] In the industrial manufacturing sector, quality inspection of processed parts is typically required, including but not limited to the detection of visual defects and structural strength testing. For visual inspection, a vision inspection system is usually used to acquire images of the workpiece surface, and image processing algorithms are used to compare the acquired images with a reference template. However, based on product functional requirements, workpiece surfaces often have non-planar features such as inclined surfaces. When inspecting such features, if the workpiece is placed horizontally, there will be a large angle between the detection optical axis and the normal of the surface being measured, resulting in a decrease in image acquisition quality and affecting inspection accuracy. If the workpiece is placed at an angle during inspection, with the inclined surface facing the inspection equipment, the workpiece needs to be frequently rotated during material handling, inspection, and unloading, which is cumbersome, labor-intensive, and makes it difficult to ensure the consistency of inspection. Utility Model Content

[0003] In view of the above, it is necessary to propose a testing fixture that facilitates the testing of the inclined surface of a workpiece, is simple to operate, has low labor intensity, and can ensure testing consistency.

[0004] This application provides a testing fixture, comprising: a support assembly including a support plate having a plurality of arrayed material feeding holes; and a rotating assembly including a plurality of rotating shafts, a plurality of material carriers, a plurality of swing arms, and connecting rods. The plurality of rotating shafts extend along a first direction and are spaced apart along a second direction perpendicular to the first direction. Each rotating shaft is rotatably connected to the support plate around the first direction, and each rotating shaft is respectively positioned close to the same side of the plurality of material feeding holes arranged along the first direction. The plurality of material carriers are correspondingly disposed at the bottom of the plurality of material feeding holes and are each connected to a corresponding... The rotating shaft, the material carrier for carrying the workpiece, the plurality of swing arms are respectively connected to the ends of the plurality of rotating shafts, the connecting rod is connected to the ends of the plurality of swing arms away from the rotating shaft, the connecting rod is used to drive the plurality of swing arms to rotate around the first direction, so as to drive the rotating shaft and the material carrier to rotate around the first direction, thereby adjusting the position of the workpiece; and a plurality of stop members, all connected to the lower side of the support plate and corresponding to the plurality of discharge holes, and each stop member is arranged near the discharge hole on the opposite side of the rotating shaft, the stop member is used to stop the workpiece.

[0005] The aforementioned inspection fixture, when carrying a workpiece, first drives multiple swing arms to rotate via a connecting rod, which in turn drives the rotating shaft and the loading component to rotate, causing the loading component to rotate to a horizontal position around a first direction. At this point, each loading component is located at the bottom of its corresponding feeding hole. After the workpiece is placed in the feeding hole of the support plate, the loading component can support the workpiece, allowing inspection of the workpiece's upper surface. When the workpiece needs to be tilted, the connecting rod drives multiple swing arms to rotate, which in turn drives the rotating shaft and the loading component to rotate. The workpiece on the loading component rotates with the loading component, thus rotating the tilted surface of the workpiece to a horizontal position, facilitating inspection of the tilted surface. When the loading component rotates to the tilted position, a stop can prevent the workpiece from slipping off the loading component.

[0006] The aforementioned inspection fixture supports the workpiece via a loading component and positions it through a discharge hole. Rotating the workpiece allows for the rotation of multiple swing arms and loading components via a connecting rod, simplifying operation and effectively reducing labor intensity. After the loading components rotate to a preset angle, the inclined surface of the workpiece can be inspected. The synchronized movement of multiple loading components ensures consistent rotation angles across the workpieces, thus effectively guaranteeing consistent inspection results.

[0007] In some embodiments, the support plate is provided with a plurality of scale grooves on the side opposite to the connecting rod. The plurality of scale grooves extend along a third direction and are spaced apart along the second direction. The connecting rod is provided with an indicator protrusion corresponding to the plurality of scale grooves. The indicator protrusion is used to cooperate with the plurality of scale grooves to display the rotation angle of the loading component. The third direction is perpendicular to both the first direction and the second direction.

[0008] In some embodiments, the connecting rod is further provided with a locking pin, which is disposed on the side of the indicator protrusion near the scale groove, and the end of the locking pin away from the indicator protrusion can be inserted into the scale groove. The locking pin is used to cooperate with the scale groove to limit the connecting rod in the second direction.

[0009] In some embodiments, the length of the scale groove along the third direction is greater than the rotation radius of the swing arm.

[0010] In some embodiments, the end of the pin away from the indicator protrusion is configured as a spherical surface.

[0011] In some embodiments, each of the rotating shafts is provided with a swing arm at both ends, and there are two connecting rods, with each connecting rod connected to a swing arm at one end of the rotating shaft.

[0012] In some embodiments, the stop member has an arc-shaped cross-section perpendicular to the first direction, and the center of the stop member is located on the axis of the rotating shaft.

[0013] In some embodiments, the stop member has a stop portion on the side away from the support plate, the stop portion extending toward the loading member, and the stop portion being used to stop the loading member.

[0014] In some embodiments, the rotating assembly further includes an anti-slip layer disposed on the side of the load member used to support the workpiece.

[0015] In some embodiments, the support assembly further includes a plurality of support legs all connected to the support plate, and the plurality of support legs are disposed on the same side of the support plate as the stop member, and the plurality of support legs are used to support the support plate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the testing fixture provided in the embodiments of this application.

[0017] Figure 2 for Figure 1 The diagram shows the structure of the material carrier of the testing fixture after rotation.

[0018] Figure 3 for Figure 2 The enlarged structural diagram of position III of the detection fixture shown.

[0019] Figure 4 for Figure 2 The diagram shown is an exploded view of the structure of the testing fixture.

[0020] Explanation of main component symbols: Inspection fixture 100, support assembly 10, support plate 11, feeding hole 111, scale groove 112, support leg 12, rotating assembly 20, rotating shaft 21, material carrier 22, swing arm 23, connecting rod 24, indicating protrusion 241, chuck pin 242, anti-slip layer 25, stop 30, stop part 31, workpiece 200, inclined surface 201. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] In the description of this application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, it should be noted that "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] The embodiments of this application will be further described below with reference to the accompanying drawings. To facilitate understanding and explanation of the embodiments of this application, a three-dimensional coordinate system is established in some of the drawings, with the X-axis direction as the first direction, the Y-axis direction as the second direction, and the Z-axis direction as the third direction. The X-axis direction, Y-axis direction, and Z-axis direction are perpendicular to each other.

[0025] Please see Figure 1 , Figure 2 and Figure 3 This application provides a testing fixture 100 for supporting a workpiece 200. The workpiece 200 can be a structural component required for assembling electronic products, such as a speaker. The electronic products can be mobile phones, tablets, smartwatches, etc. In this embodiment, the workpiece 200 has an inclined surface 201. When the workpiece 200 is placed horizontally, the plane containing the inclined surface 201 intersects the horizontal plane. In this embodiment, taking a speaker as an example, the inclined surface 201 of the workpiece 200 is the speaker opening, through which the internal condition of the workpiece 200 can be detected. However, this is not intended to limit the scope of this application. It can be understood that the testing fixture 100 provided in this application is used to support and adjust the position of the workpiece 200 so that an external testing device (not shown) can inspect the surface, inclined surface 201, etc., of the workpiece 200. The external testing device can be a camera or other equipment. The testing fixture 100 includes a support assembly 10, a rotating assembly 20, and multiple stop members 30.

[0026] Specifically, the support component 10 includes a support plate 11, which has multiple arrayed feeding holes 111. The number of feeding holes 111 can be nine, twelve, sixteen, etc., and the feeding holes 111 can be arranged in various ways such as three rows and three columns, three rows and four columns, or four rows and four columns. It can be understood that the number of feeding holes 111 can also be more or less, and their arrangement can also be other arrangements, depending on the actual needs, and is not limited here.

[0027] The rotating assembly 20 includes multiple rotating shafts 21, multiple material carriers 22, multiple swing arms 23, and a connecting rod 24. The multiple rotating shafts 21 extend along a first direction and are spaced apart along a second direction perpendicular to the first direction. Each rotating shaft 21 is rotatably connected to the support plate 11 around the first direction, and each rotating shaft 21 is respectively located close to the same side of the multiple material discharge holes 111 arranged along the first direction. The multiple material carriers 22 are correspondingly located at the bottom of the multiple material discharge holes 111 and are all connected to the corresponding rotating shafts 21. The material carriers 22 are used to carry the workpiece 200. The multiple swing arms 23 are respectively connected to the ends of the multiple rotating shafts 21. The connecting rod 24 is connected to the end of the multiple swing arms 23 away from the rotating shafts 21. The connecting rod 24 is used to drive the multiple swing arms 23 to rotate around the first direction, so as to drive the rotating shafts 21 and the material carriers 22 to rotate around the first direction, thereby adjusting the position of the workpiece 200.

[0028] The rotating shaft 21 is generally a rod-shaped structure. The number of rotating shafts 21 can be three, four, etc., and the specific number of rotating shafts 21 is consistent with the number of rows of material discharge holes 111. The number of material carriers 22 is consistent with the number of material discharge holes 111, and can be nine, twelve, sixteen, etc. The material carriers 22 can be set as plate-shaped structures to support the workpiece 200. The material carriers 22 are fixedly connected to the corresponding rotating shafts 21. The swing arms 23 can be rod-shaped structures. The number of swing arms 23 can be the same as the number of rotating shafts 21. Each swing arm 23 is connected to the same end of the corresponding rotating shaft 21 and is fixedly connected to the rotating shaft 21. The connecting rod 24 can be a strip-shaped structure, and the connecting rod 24 is rotatably connected to multiple swing arms 23. When adjusting the angle of the loading component 22, the connecting rod 24 can pull multiple swing arms 23 to rotate around the first direction. The swing arms 23 drive the rotating shaft 21 to rotate around the first direction, and the rotating shaft 21 drives the loading component 22 to rotate around the first direction, thereby driving the workpiece 200 on the loading component 22 to rotate around the first direction.

[0029] Multiple stop members 30 are connected to the lower side of the support plate 11 and are arranged one-to-one with the multiple discharge holes 111. Each stop member 30 is located on the opposite side of the discharge hole 111 and opposite to the rotating shaft 21. The stop members 30 are used to stop the workpiece 200. The stop members 30 can be plate-shaped or sheet-shaped. The number of stop members 30 is consistent with the number of discharge holes 111, such as nine, twelve, sixteen, etc. By setting the stop members 30, the workpiece 200 on the loading member 22 can be stopped, preventing the workpiece 200 from slipping off the loading member 22 after the loading member 22 rotates.

[0030] When the inspection fixture 100 provided in this embodiment carries the workpiece 200, it first drives multiple swing arms 23 to rotate via the connecting rod 24, which in turn drives the rotating shaft 21 and the loading component 22 to rotate, so that the loading component 22 rotates to a horizontal state around a first direction. At this time, each loading component 22 is located at the bottom of the corresponding discharge hole 111. After the workpiece 200 is placed in the discharge hole 111 of the support plate 11, the loading component 22 can support the workpiece 200, and the upper surface of the workpiece 200 can be inspected. When it is necessary to place the workpiece 200 at an angle, the connecting rod 24 drives multiple swing arms 23 to rotate, and the swing arms 23 drive the rotating shaft 21 and the loading component 22 to rotate. The workpiece 200 on the loading component 22 rotates with the loading component 22, thereby rotating the inclined surface 201 of the workpiece 200 to a horizontal state, which facilitates the inspection of the inclined surface 201 of the workpiece 200. When the loading component 22 rotates to an inclined state, the stop component 30 can stop the workpiece 200 and prevent the workpiece 200 from slipping off the loading component 22.

[0031] The inspection fixture 100 provided in this embodiment can support the workpiece 200 through the loading member 22 and position the workpiece 200 through the discharge hole 111. When rotating the workpiece 200, the multiple swing arms 23 and multiple loading members 22 can be rotated by operating the connecting rod 24. The operation is simple and effectively reduces labor intensity. After the loading member 22 rotates by a preset angle, the inclined surface 201 of the workpiece 200 can be inspected. Moreover, the multiple loading members 22 move synchronously, so that the rotation angle of the multiple workpieces 200 is consistent, thus effectively ensuring the consistency of the inspection.

[0032] In some embodiments, please refer to the following: Figure 2 and Figure 3The support plate 11 has multiple graduated grooves 112 on the side opposite to the connecting rod 24. These grooves extend along a third direction and are spaced apart along a second direction. The connecting rod 24 has indicator protrusions 241 corresponding to the graduated grooves 112. These protrusions 241 work in conjunction with the graduated grooves 112 to display the rotation angle of the material carrier 22. The graduated grooves 112 can have six, nine, or twelve grooves. The indicator protrusions 241 can be pointed. When an indicator protrusion 241 points to a graduated groove 112, it displays the rotation angle of the material carrier 22. The graduated grooves 112 can also be marked with corresponding angle readings for easy observation by the operator. In this embodiment, there are two ways to set the scale grooves 112. The first way is to set multiple scale grooves 112 at equal intervals along the second direction. When marking the scale, first, the indicator protrusion 241 is aligned with one of the scale grooves 112. Then, the rotation angle of the material carrier 22 is measured at this time, and the angle is marked on the corresponding scale groove 112. This process is repeated to mark all the scale grooves 112. The second way is to set multiple scale grooves 112 at non-equal intervals along the second direction. When setting the scale grooves 112, first, the material carrier 22 is rotated to a certain angle, such as 15°. Then, the position corresponding to the indicator protrusion 241 on the support plate 11 is marked. Then, the material carrier 22 is rotated again, such as to 30°. The above operation is repeated to mark the positions of the indicator protrusions 241 corresponding to multiple angles. Finally, the scale grooves 112 are machined at the corresponding marked positions.

[0033] In some embodiments, see Figure 2 and Figure 3 The connecting rod 24 is also equipped with a locking pin 242. The locking pin 242 is located on the side of the indicator protrusion 241 near the scale groove 112, and the end of the locking pin 242 away from the indicator protrusion 241 can be inserted into the scale groove 112. The locking pin 242 is used to limit the connecting rod 24 in the second direction in conjunction with the scale groove 112. The locking pin 242 can be inserted into the scale groove 112 to form a mechanical limit on the connecting rod 24 in the second direction, preventing the connecting rod 24 from shifting laterally during operation, ensuring that the rotation angles of multiple material carriers 22 are strictly synchronized, and improving the consistency of batch adjustment. The insertion design of the locking pin 242 provides a clear "gear feel". The operator can confirm the position of the connecting rod 24 through tactile feedback, avoiding overshoot or rebound during angle adjustment, and enhancing the stability and controllability of the adjustment process. The locking pin 242 and the indicator protrusion 241 are integrated into the connecting rod 24. While realizing the scale reading function, the angle position is locked by physical insertion, forming a double insurance of visual and tactile senses, reducing the risk of human error.

[0034] In some embodiments, see Figure 2 and Figure 3The length of the scale groove 112 along the third direction is greater than the rotation radius of the swing arm 23. The length of the scale groove 112 along the third direction covers the entire rotation stroke of the swing arm 23, ensuring that the material carrier 22 can correspond to the scale indication from the initial position to the maximum rotation angle, avoiding the loss of angle reading due to insufficient length of the scale groove 112, and achieving a comprehensive adjustment range. If the length of the scale groove 112 is too short, when the swing arm 23 rotates to the limit position, the connecting rod 24 may collide with the support plate 11 because it exceeds the scale range. By lengthening the scale groove 112, it is ensured that the connecting rod 24 and the indicating protrusion 241 always slide within the scale groove 112 during the full stroke of the swing arm 23, avoiding mechanical interference and ensuring smooth adjustment.

[0035] In some embodiments, see Figure 2 and Figure 3 The end of the caliper pin 242 furthest from the indicator protrusion 241 is spherical. The contact between the spherical end and the scale groove 112 is point contact or a very small area contact. Compared to a flat or sharp-cornered design, this significantly reduces the sliding friction resistance between them, minimizing wear on both the scale groove 112 and the caliper pin 242, and improving the durability and long-term accuracy stability of the inspection fixture 100. The smooth, rounded nature of the spherical structure allows the caliper pin 242 to move more smoothly within the scale groove 112, reducing the likelihood of jamming due to burrs or minor misalignments, ensuring a smooth operating feel during angle adjustment. The spherical design allows for a certain angular deviation when the caliper pin 242 is inserted into the scale groove 112, still allowing it to slide smoothly into the groove, reducing the alignment accuracy requirements during assembly or operation, and improving the usability and reliability of the inspection fixture 100. The gentle contact of the spherical surface avoids scratching the edges of the scale groove 112 with sharp corners, maintaining the clarity of the scale groove 112, especially during frequent adjustments, ensuring the accuracy of angle readings after long-term use.

[0036] In some embodiments, see Figure 1 and Figure 2 Each rotating shaft 21 has a swing arm 23 at both ends, and two connecting rods 24 are provided, each connecting to a swing arm 23 at one end of the rotating shaft 21. The two connecting rods 24 symmetrically drive the swing arms 23 at both ends of the rotating shaft 21, eliminating the torque imbalance problem of single-sided drive, ensuring that the rotation angles of multiple load-bearing components 22 are strictly synchronized, and avoiding positional deviations of the workpiece 200 due to uneven force. The two connecting rods 24 share the load, reducing stress concentration on individual swing arms 23 and connecting rods 24, preventing the rotating shaft 21 from bending or twisting during adjustment, and ensuring mechanical precision for long-term use.

[0037] In some embodiments, see Figure 2 and Figure 4The stop 30 has an arc-shaped cross-section perpendicular to the first direction, and the center of the stop 30 is located on the axis of the rotating shaft 21. The arc-shaped stop 30 always maintains a consistent contact distance with the workpiece 200, avoiding wobbling or displacement caused by sudden changes in the gap when the workpiece 200 rotates, and ensuring the stability of the limit.

[0038] In some embodiments, see Figure 2 and Figure 4 A stop portion 31 is provided on the side of the stop member 30 away from the support plate 11, extending towards the loading member 22. The stop portion 31 is used to stop the loading member 22. The extended structure of the stop portion 31 simultaneously constrains the workpiece 200 and the loading member 22, preventing the workpiece 200 from falling off and limiting the rotation overtravel of the loading member 22, forming a more reliable physical error prevention protection. Through the contact limitation between the stop portion 31 and the loading member 22, the maximum allowable rotation angle of the loading member 22 can be clearly defined, avoiding detection errors or mechanical damage caused by over-rotation.

[0039] In some embodiments, see Figure 2 and Figure 4 The rotating assembly 20 also includes an anti-slip layer 25, which is disposed on the side of the material carrier 22 used to support the workpiece 200. The anti-slip layer 25 is used for frictional contact with the workpiece 200. The material of the anti-slip layer 25 can be rubber, polyurethane, etc. By increasing the coefficient of friction, the anti-slip layer 25 effectively prevents the workpiece 200 from sliding or shifting during rotation adjustment or testing, ensuring the accuracy of position detection. The anti-slip layer 25 also prevents scratches or indentations on the surface of the workpiece 200, avoiding damage to the workpiece 200.

[0040] In some embodiments, see Figure 1 and Figure 2 The support assembly 10 also includes multiple support legs 12 connected to the support plate 11, and all the support legs 12 are disposed on the same side of the support plate 11 as the stop member 30. The multiple support legs 12 are used to support the support plate 11. There can be four, six, or other support legs 12. By setting the support legs 12, the support plate 11 can be effectively supported, and the rotation space of the loading member 22 can be provided to prevent other objects from affecting the rotation of the loading member 22.

[0041] The working process of the detection fixture 100 provided in this embodiment is roughly as follows:

[0042] First, the connecting rod 24 drives multiple swing arms 23 to rotate, which in turn drives the rotating shaft 21 and the material carrier 22 to rotate, so that the material carrier 22 rotates to a horizontal position, at which point each material carrier 22 is located at the bottom of the corresponding discharge hole 111. Then, the workpiece 200 is placed in the discharge hole 111, and the material carrier 22 can support the workpiece 200. At this time, the upper surface of the workpiece 200 can be inspected.

[0043] When the workpiece 200 needs to be placed at an angle, the connecting rod 24 drives multiple swing arms 23 to rotate. The swing arms 23 drive the rotating shaft 21 and the loading component 22 to rotate, and the workpiece 200 on the loading component 22 rotates with the loading component 22. When the loading component 22 rotates, the rotation angle of the loading component 22 can be read through the indicating protrusion 241 and the scale groove 112. When the loading component 22 rotates to the tilted state, the stop 30 can stop the workpiece 200 to prevent the workpiece 200 from slipping off the loading component 22. When the tilted surface 201 of the workpiece 200 rotates to the horizontal state, it is convenient to inspect the tilted surface 201 of the workpiece 200.

[0044] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A testing fixture, characterized in that, include: The support assembly includes a support plate, which has a plurality of material discharge holes arranged in an array; A rotating assembly includes multiple rotating shafts, multiple material carriers, multiple swing arms, and connecting rods. The multiple rotating shafts extend along a first direction and are spaced apart along a second direction perpendicular to the first direction. Each rotating shaft is rotatably connected to a support plate around the first direction, and each rotating shaft is positioned close to the same side of multiple material discharge holes arranged along the first direction. Multiple material carriers are correspondingly located at the bottom of the multiple material discharge holes and are connected to their respective rotating shafts. The material carriers are used to carry workpieces. Multiple swing arms are connected to the ends of the multiple rotating shafts. A connecting rod is connected to the end of each swing arm away from the rotating shaft. The connecting rod drives the multiple swing arms to rotate around the first direction, thereby causing the rotating shafts and material carriers to rotate around the first direction, and thus adjusting the position of the workpiece. and Multiple stop members are connected to the lower side of the support plate and are arranged in a corresponding manner to the multiple feeding holes. Each stop member is arranged near the feeding hole on the opposite side of the rotating shaft. The stop members are used to stop the workpiece.

2. The testing fixture as described in claim 1, characterized in that, The support plate has multiple graduated grooves on the side opposite to the connecting rod. These grooves extend along a third direction and are spaced apart along the second direction. The connecting rod has indicator protrusions corresponding to the graduated grooves. These indicator protrusions cooperate with the graduated grooves to display the rotation angle of the material carrier. The third direction is perpendicular to both the first direction and the second direction.

3. The testing fixture as described in claim 2, characterized in that, The connecting rod is also provided with a locking pin, which is located on the side of the indicator protrusion near the scale groove, and the end of the locking pin away from the indicator protrusion can be inserted into the scale groove. The locking pin is used to cooperate with the scale groove to limit the connecting rod in the second direction.

4. The testing fixture as described in claim 3, characterized in that, The length of the scale groove along the third direction is greater than the rotation radius of the swing arm.

5. The testing fixture as described in claim 3, characterized in that, The end of the SIM card pin furthest from the indicator protrusion is spherical.

6. The testing fixture as described in claim 1, characterized in that, Each of the rotating shafts is provided with a swing arm at both ends, and there are two connecting rods, which are respectively connected to the swing arms at both ends of the rotating shaft.

7. The testing fixture as described in claim 1, characterized in that, The stop member has an arc-shaped cross-section perpendicular to the first direction, and the center of the stop member is located on the axis of the rotating shaft.

8. The testing fixture as described in claim 1, characterized in that, The stop member has a stop portion on the side away from the support plate, the stop portion extends toward the material carrier, and the stop portion is used to stop the material carrier.

9. The testing fixture as described in claim 1, characterized in that, The rotating assembly also includes an anti-slip layer disposed on the side of the material carrier used to support the workpiece.

10. The testing fixture as described in claim 1, characterized in that, The support assembly also includes a plurality of support legs, all of which are connected to the support plate, and the plurality of support legs are disposed on the same side of the support plate as the stop member, and the plurality of support legs are used to support the support plate.

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