A locking device and testing machine

Abstract

This application relates to a locking device and a testing machine. The locking device includes: a main plate, a first locking slider, a second locking slider, a third locking slider, and a drive cylinder. The first, second, and third locking sliders are parallel to each other on the main plate and slidably connected to it. The third locking slider is positioned between the first and second locking sliders. The first, second, and third locking sliders are connected by a transmission mechanism. Guide rails are provided on the first, second, and third locking sliders, extending along their sliding directions. One end of the guide rail is farther from the main plate than the other end. The drive cylinder is mounted on the main plate and drives the first, second, and third locking sliders to slide. Therefore, the test board can be locked to the main plate at multiple positions using the first, second, and third locking sliders, resulting in more uniform force distribution on the test board and improved stability and accuracy of the connection between the test board and the main plate.

Description

Technical Field

[0001] This invention relates to the field of integrated circuit testing technology, and in particular to a locking device and a testing machine. Background Technology

[0002] ATE (Automatic Test Equipment) is a device used to perform automated testing on devices under test, such as semiconductor integrated circuits (ICs). When testing a device under test, the device under test is generally placed on an interface test board. Then, the interface test board is connected and locked to the output interface of the resource board inside the test head. Test signals are sent to the device under test on the interface test board through the resource board inside the test head, and feedback signals are received from the device under test to complete the test.

[0003] The interface test board is usually different for different devices under test. To facilitate replacement and maintenance, the interface test board is often located on the top of the test machine.

[0004] The resource boards inside the test machine typically have corresponding probe blocks or connectors at the output interface, with a large number of probes arranged on the probe blocks. The number of resource boards configured inside the test machine varies depending on the needs of the end user, often ranging from several thousand to tens of thousands of probes. These probes ultimately need to contact the interface test board to form an effective electrical signal path to complete the testing of the device under test. During this contact process, two aspects require special attention: First, the interface test board needs to overcome the spring force of the probes during the pressing process. The pressing force depends on the number of probes and the spring force of a single probe when pressed into place, generally ranging from 1000N to 8000N. Second, the interface test board needs to be pressed smoothly, with each probe precisely contacting the corresponding metal contact (Pad) position on the interface test board to ensure the correctness of the electrical definition. This places high demands on the locking device of the interface test board, requiring the locking force generated by the device to be sufficient to overcome the spring force of the probes, while preventing deformation of the interface test board during the locking and pressing process to ensure smooth operation and accurate positioning. Therefore, there is an urgent need for a locking device and a testing machine to prevent the test board from deforming due to excessive force during the locking and pressing process, so as to ensure smooth operation and accurate connection position of the test board. Summary of the Invention

[0005] In view of the above-mentioned problems of the prior art, this application provides a locking device and a testing machine to prevent the test board from deforming due to excessive force during the locking and pressing process, so as to ensure smooth operation and accurate positioning.

[0006] This application provides a locking device, comprising: a main plate; a first locking slider, a second locking slider, and a third locking slider, wherein the first locking slider, the second locking slider, and the third locking slider are parallel to each other on the main plate and slidably connected to the main plate, the third locking slider is disposed at the middle position between the first locking slider and the second locking slider, and the first locking slider, the second locking slider, and the third locking slider are drive-connected to each other; a guide rail is provided on the first locking slider, the second locking slider, and the third locking slider, the guide rail extends along the sliding direction of the first locking slider, the second locking slider, and the third locking slider, one end of the guide rail is farther from the main plate than the other end, and an opening is formed on the first locking slider, the second locking slider, and the third locking slider; and a drive cylinder, the drive cylinder being disposed on the main plate and drive-connected to the first locking slider, the second locking slider, and the third locking slider, driving the first locking slider, the second locking slider, and the third locking slider to slide from the other end of the guide rail toward one end of the guide rail.

[0007] As described above, by positioning one end of the guide rail on the first, second, and third locking sliders further from the main body plate than the other end, the fixing pin on the test plate can enter the guide rail through the opening. Then, by sliding the first, second, and third locking sliders from one end of the guide rail towards the other, the fixing pin moves along the guide rail from one end to the other. Because the distance between one end of the guide rail and the main body plate is greater than the other end, the test plate moves towards the main body plate, thus locking the test plate. By placing the third locking slider in the middle position between the first and second locking sliders, the force on the test plate is more even when driving it towards the main body plate, avoiding excessive force differences between the two ends and the middle position, which could cause deformation of the test plate. This improves the stability and accuracy of the connection between the test plate and the main body plate.

[0008] As one possible implementation of the first aspect, multiple third locking sliders are provided, arranged symmetrically between the first locking slider and the second locking slider.

[0009] As described above, by setting multiple third locking sliders between the first and second locking sliders, the force on the test plate can be made more uniform when the test plate moves towards the main plate, avoiding excessive force differences at both ends of the test plate and preventing deformation of the test plate. This improves the stability and accuracy of the connection between the test plate and the main plate.

[0010] As one possible implementation of the first aspect, the third locking sliders are arranged in pairs and parallel to each other, and the sliding directions of adjacent pairs of the first locking slider, the second locking slider and the third locking slider are opposite, and the opening directions of the guide rail are opposite.

[0011] As described above, by making the sliding directions of adjacent locking sliders (first, second, and third) opposite, the opening directions of the guide rail are reversed. This allows the forces acting on adjacent fixing pins parallel to the main plate to be opposite in direction when they move in the guide rail, thereby improving the stability of the test plate when it moves toward the main plate.

[0012] As one possible implementation of the first aspect, it also includes: an assist rod, which is kinetically connected to the third locking slider.

[0013] As described above, by setting an assist rod, it can be operated manually to drive the third locking slider to slide, which in turn drives the first and second locking sliders to slide. Therefore, locking and separating the test plate and the main body plate can be manually completed even if the first or second drive cylinder malfunctions, thus improving the flexibility of the locking device.

[0014] As one possible implementation of the first aspect, the angle between the extension direction of the guide rail and the main body plate ranges from 5° to 20°.

[0015] Therefore, by setting the angle between the extension direction of the guide rail and the main body plate to a range of 5° to 20°, it is possible to avoid the situation where the angle between the guide rail and the main body plate is too small, resulting in an excessively long guide rail to achieve the required locking distance between the test plate and the main body plate. This would cause the first and second drive cylinders to slide the first, second, and third locking sliders over an excessively long distance, affecting the layout of the guide rail. It also avoids the situation where the angle between the guide rail and the main body plate is too large, resulting in excessive driving force required to drive the first, second, and third locking sliders, thus narrowing the selection range of drive cylinders and increasing the equipment cost of the drive cylinders.

[0016] As one possible implementation of the first aspect, it also includes: a locating pin, which is vertically disposed on the main body plate.

[0017] As described above, by setting locating pins on the main plate, they can engage with locating holes on the test plate to position the test plate, ensuring that the test plate moves perpendicular to the main plate as it approaches it. This improves the stability and accuracy of the connection between the test plate and the main plate.

[0018] As one possible implementation of the first aspect, the locating pins are provided in multiple ways.

[0019] As shown above, by setting multiple positioning pins, the stability of positioning the test board can be improved.

[0020] As one possible implementation of the first aspect, it further includes: a transmission rod, wherein the first locking slider, the second locking slider and the third locking slider are connected by the transmission rod, and the first locking slider, the second locking slider and the third locking slider are located on the same side of the transmission rod.

[0021] As described above, by setting the first locking slider, the second locking slider, and the third locking slider on the same side of the transmission rod, the transmission structure between the first locking slider, the second locking slider, and the third locking slider can be simplified, saving installation space.

[0022] The second aspect of this application provides a testing machine, comprising: a locking device, wherein the locking device is an implementation of the locking device described in any one of the first aspects of this application; a testing plate, wherein the testing plate is used to mount the device under test, and fixing pins are respectively provided on both sides and the middle position of the testing plate, wherein the fixing pins enter the guide rail through the openings on the first locking slider, the second locking slider and the third locking slider respectively.

[0023] As described above, by positioning one end of the guide rail on the first, second, and third locking sliders further from the main body plate than the other end, the fixing pin on the test plate can enter the guide rail through the opening. By sliding the first, second, and third locking sliders, the fixing pin moves along the guide rail, thereby driving the test plate towards the main body plate to achieve locking. By placing the third locking slider in the middle position between the first and second locking sliders, the force on the test plate is more evenly distributed when driving it towards the main body plate, avoiding excessive force differences between the two ends and the middle position, which could cause deformation of the test plate. This improves the stability and accuracy of the connection between the test plate and the main body plate.

[0024] As one possible implementation of the second aspect, the fixing pin is provided with a roller.

[0025] As described above, by installing rollers on the fixing pin, the frictional force when the fixing pin slides in the guide rail can be reduced. This reduces the resistance when locking the test plate, thus increasing the applicability of the testing machine.

[0026] As a possible implementation of the second aspect, the main body plate is provided with a positioning pin, and the test plate is provided with a positioning hole at the position corresponding to the positioning pin.

[0027] As described above, by setting locating pins on the main plate, they can engage with locating holes on the test plate to position the test plate, ensuring that the test plate moves perpendicular to the main plate as it approaches it. This improves the stability and accuracy of the connection between the test plate and the main plate.

[0028] These and other aspects of the invention will become more apparent from the following description of several embodiments. Attached Figure Description

[0029] The various features of the present invention and the relationships between them are further explained below with reference to the accompanying drawings. The drawings are exemplary; some features are not shown to scale, and some drawings may omit conventional features in the field of this application that are not essential to this application, or additional features that are not essential to this application may be shown. The combination of features shown in the drawings is not intended to limit the present application. Furthermore, throughout this specification, the same reference numerals refer to the same things. Specific descriptions of the drawings are as follows:

[0030] Figure 1 This is a schematic diagram of the structure of the test machine in the embodiments of this application;

[0031] Figure 2 for Figure 1 A three-dimensional structural diagram of the central locking device;

[0032] Figure 3 for Figure 1 A schematic diagram of the lower orthographic projection of the central locking device;

[0033] Figure 4 for Figure 1 A schematic diagram of the three-dimensional structure of the test board;

[0034] Figure 5 for Figure 1 A schematic diagram of the lower orthographic projection of the test board;

[0035] Figure 6 for Figure 1 A schematic diagram of the upper orthographic projection of the test board;

[0036] Figure 7 This is a schematic diagram showing the connection between the fixing pin and the guide rail.

[0037] Explanation of reference numerals in the attached figures

[0038] 10 Testing machine; 100 Locking device; 110 Main plate; 111 Slide rail; 112 Positioning pin; 120 First locking slider; 121 Connector; 122 Connecting part; 130 Second locking slider; 131 Connector; 140 Third locking slider; 141 Connector; 142 Second connecting piece; 142a Connecting part; 150 Guide rail; 151 Opening; 160 First drive cylinder; 170 Second drive cylinder; 180 Transmission rod; 190 First connecting piece; 191 Connecting hole; 200 Test plate; 210 Fixing pin; 211 Roller; 220 Positioning hole; 230 Accommodating part; 300 Assist rod. Detailed Implementation

[0039] The terms "first," "second," "third," etc., used in the specification and claims are only used to distinguish similar objects and do not represent a specific ordering of objects. It is understood that, where permissible, a specific order or sequence may be interchanged so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0040] The term "comprising" as used in the specification and claims should not be construed as limiting itself to what follows; it does not exclude other elements. Therefore, it should be interpreted as specifying the presence of the mentioned feature, integral, or component, but does not exclude the presence or addition of one or more other features, integrals, or components, or groups thereof. Thus, the statement "equipment comprising means A and B" should not be limited to an equipment consisting solely of components A and B.

[0041] The term "an embodiment" or "an embodiment" as used in this specification means that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in at least one embodiment of the invention. Therefore, the terms "in one embodiment" or "in an embodiment" appearing throughout this specification do not necessarily refer to the same embodiment, but may refer to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics can be combined in any suitable manner, as will be apparent to those skilled in the art from this disclosure.

[0042] The specific structure of the locking device and testing machine in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0043] Figure 1 This is a schematic diagram of the structure of the test machine 10 in the embodiments of this application; Figure 2 for Figure 1 A three-dimensional structural diagram of the locking device 100; Figure 3 for Figure 1 A schematic diagram of the lower orthographic projection of the locking device 100. (See attached diagram.) Figures 1-3As shown, the testing machine 10 in this embodiment includes a locking device 100 and a testing plate 200. The locking device 100 includes a main plate 110, a first locking slider 120, a second locking slider 130, a third locking slider 140, a first drive cylinder 160, and a second drive cylinder 170. The first locking slider 120, the second locking slider 130, and the third locking slider 140 are arranged parallel to each other on the main plate 110 and are slidably connected to it. The third locking slider 140 is positioned between the first locking slider 120 and the second locking slider 130, and the first locking slider 120, the second locking slider 130, and the third locking slider 140 are connected by a transmission mechanism. Guide rails 150 are provided on the first locking slider 120, the second locking slider 130, and the third locking slider 140. The guide rails 150 extend along the sliding direction of the first locking slider 120, the second locking slider 130, and the third locking slider 140. One end of the guide rail 150 is farther from the main body plate 110 than the other end, and an opening 151 is formed on the first locking slider 120, the second locking slider 130, and the third locking slider 140. Drive cylinders 160 and 170 are provided on the main body plate 110. The drive rods of the drive cylinders 160 and 170 are connected to the first locking slider 120, the second locking slider 130, and the third locking slider 140, driving the first locking slider 120, the second locking slider 130, and the third locking slider 140 to slide from the other end of the guide rail 150 toward one end of the guide rail.

[0044] Alternatively, in some possible embodiments, the drive cylinders 160 and 170 may be fixedly mounted on the first locking slider 120, the second locking slider 130, and / or the third locking slider 140, so that the drive rods of the drive cylinders 160 and 170 are connected to the main body plate 110 in a transmission manner, which is not limited.

[0045] Therefore, by making one end of the guide rail 150 on the first locking slider 120, the second locking slider 130, and the third locking slider 140 farther from the main body plate 110 than the other end, the fixing pin 210 on the test plate 200 can enter the guide rail 150 through the opening 151. Then, by sliding the first locking slider 120, the second locking slider 130, and the third locking slider 140 from the other end of the guide rail 150 toward one end of the guide rail 150, the fixing pin 210 moves along the guide rail 150, from one end of the guide rail 150 to the other end. Because one end of the guide rail 150 is farther from the main body plate 110 than the other end, the test plate 200 moves toward the main body plate 110, thereby locking the test plate 200. By positioning the third locking slider 140 at the midpoint between the first locking slider 120 and the second locking slider 130, the force on the test plate 200 is made more uniform when the test plate 200 moves towards the main body plate 110. This prevents excessive force differences between the two ends and the middle position of the test plate 200, which could cause deformation of the test plate 200. Consequently, the stability and accuracy of the connection between the test plate 200 and the main body plate 110 are improved.

[0046] like Figure 3 As shown, drive cylinders 160 and 170 include a first drive cylinder 160 and a second drive cylinder 170. The first drive cylinder 160 is positioned on the main body plate 110 at a position corresponding to the first locking slider 120. That is, when viewed from below, the first drive cylinder 160 coincides with the first locking slider 120. The drive rod of the first drive cylinder 160 extends along the sliding direction of the first locking slider 120 and is fixedly connected to the first locking slider 120. The second drive cylinder 170 is positioned on the main body plate 110 at a position corresponding to the second locking slider 130. That is, when viewed from below, the second drive cylinder 170 coincides with the second locking slider 130. The drive rod of the second drive cylinder 170 extends along the sliding direction of the second locking slider 130 and is fixedly connected to the second locking slider 130.

[0047] Furthermore, a third drive cylinder (not shown) may also be included. The drive rod of the third drive cylinder is connected to the third locking slider 140, driving the third locking slider 140 to slide on the main body plate 110. The arrangement of the third drive cylinder can be the same as that of the first drive cylinder 160 and the second drive cylinder 170, and will not be described in detail here.

[0048] like Figure 2 , Figure 3As shown, the main body plate 110 is rectangular, and multiple parallel slide rails 111 are provided on the main body plate 110. The slide rails 111 are rectangular through holes. The first locking slider 120, the second locking slider 130, and the third locking slider 140 are elongated and are respectively disposed in the slide rails 111 and slidably connected to the slide rails 111. The upper surfaces of the first locking slider 120, the second locking slider 130, and the third locking slider 140 protrude a certain height from the upper surface of the main body plate 110, and the guide rail 150 is disposed on the side of the protruding part.

[0049] like Figure 2 , Figure 3 As shown, multiple third locking sliders 140 are provided, arranged in parallel and symmetrically between the first locking slider 120 and the second locking slider 130. Therefore, by providing multiple third locking sliders 140 between the first locking slider 120 and the second locking slider 130, the force on the test plate 200 is made more uniform when the test plate 200 moves towards the main plate 110, avoiding excessive force differences at both ends of the test plate 200 and preventing deformation of the test plate 200. This improves the stability and accuracy of the connection between the test plate 200 and the main plate 110.

[0050] like Figure 2 , Figure 3 As shown, multiple third locking sliders 140 are evenly arranged between the first locking slider 120 and the second locking slider 130. This ensures that when the test plate 200 moves toward the main plate 110, the force on the test plate 200 in the area between the first locking slider 120 and the second locking slider 130 is more uniform, preventing excessive force differences between the middle and both ends of the test plate 200 and thus avoiding deformation of the test plate 200.

[0051] like Figure 2 As shown, the third locking slider 140 can be configured, for example, as follows: Figure 2 The two third locking sliders 140 shown are arranged in pairs. The sliding directions of adjacent first locking sliders 120, second locking sliders 130, and third locking sliders 140 are opposite, and the openings 151 of the guide rail 150 are opposite in direction. Therefore, by making the sliding directions of adjacent first locking sliders 120, second locking sliders 130, and third locking sliders 140 opposite, and by making the openings 151 of the guide rail 150 opposite in direction, the forces acting on adjacent fixing pins 210 parallel to the main body plate 110 when moving in the guide rail 150 are opposite in direction, thereby improving the stability of the test plate 200 when moving towards the main body plate 110.

[0052] Furthermore, the first locking slider 120, the second locking slider 130, and the third locking slider 140 may be provided with multiple connected segments in the left-right direction. In some embodiments, each segment may also be individually regarded as the first locking slider 120, the second locking slider 130, and the third locking slider 140.

[0053] like Figure 2 , Figure 3 As shown, the locking device 100 in this embodiment further includes a transmission rod 180 and a first connecting member 190. The transmission rod 180 is an elongated component, and the first locking slider 120, the second locking slider 130, and the third locking slider 140 are located on the same side of the transmission rod 180, specifically at one end of each of the three sliders. The first connecting member 190 is L-shaped, as shown... Figure 3 Four locking sliders are arranged as shown, located at one end of the first locking slider 120, the second locking slider 130, and the third locking slider 140, respectively. A first connecting member 190 is hinged to the main body plate 110 at the middle corner. One end of each of the four first connecting members 190 is hinged to a transmission rod 180, and all four first connecting members 190 are located on the same side of the transmission rod 180. Therefore, the transmission rod 180 can cause all four first connecting members 190 to rotate simultaneously in the same direction. The other ends of the four first connecting members 190 are hinged to one end of each of the first locking slider 120, the second locking slider 130, and the third locking slider 140, respectively. When the first locking slider 120 slides, the first connecting members 190 can drive the transmission rod 180 to move, thereby causing the other first connecting members 190 to rotate. This allows the second locking slider 130 and the third locking slider 140 to slide. Similarly, when the second locking slider 130 slides, it can also drive the first locking slider 120 and the third locking slider 140 to slide.

[0054] Specifically, an elongated connecting hole 191 is provided at the hinge position between the first connecting member 190 and the first locking slider 120, and between the second locking slider 130 and the third locking slider 140. Connecting heads 121, 131, and 141 are provided at one end of each of the first, second, and third locking sliders 120 and 130, respectively. These connecting heads extend into the connecting hole 191 and can slide along the connecting hole 191 while rotating within it. This allows the first connecting member 190 to absorb forward and backward displacement when rotating, resulting in smoother sliding of the first locking slider 120, second locking slider 130, and third locking slider 140. Specifically, connectors 121, 131, and 141 can also be configured as roller structures, thereby reducing the friction when connectors 121, 131, and 141 slide in the connection hole 191, making the sliding of connectors 121, 131, and 141 in the connection hole 191 smoother.

[0055] like Figure 3 As shown, the first connecting member 190, which is connected to the first locking slider 120 and the second locking slider 130, is hinged to the main body plate 110 at different sides of the first locking slider 120 and the second locking slider 130, respectively. For example, Figure 3 As shown, the first connector 190 connected to the first locking slider 120 is located on the rear side of the first locking slider 120, and the first connector 190 connected to the second locking slider 130 is located on the front side of the second locking slider 130. Therefore, the first locking slider 120 and the second locking slider 130 can slide in opposite directions.

[0056] like Figure 3 As shown, the first connecting member 190, which is connected to the pair of third locking sliders 140, is hinged to the main body plate 110 at different sides of the pair of third locking sliders 140. This allows the pair of third locking sliders 140 to slide in opposite directions.

[0057] like Figure 3 As shown, the locking device 100 in this embodiment may further include two second connecting members 142. The second connecting members 142 are disposed on the main body plate 110, located at the other end of the two third locking sliders 140 (away from the end of the first connecting member 190). The shape of the second connecting member 142 is the same as that of the first connecting member 190, and the connection method between the second connecting member 142 and the main body plate 110 and the third locking sliders 140 is the same as that of the first connecting member 190, which will not be described again here. The difference between the second connecting member 142 and the first connecting member 190 is that the second connecting member 142 is also provided with a connecting portion 142a. Specifically, the connecting portion 142a may be located at the end away from the connection between the second connecting member 142 and the third locking slider 140.

[0058] The connecting part 142a can be detachably connected to devices such as the assist rod 300, so that the assist rod 300 can be driven to the third locking slider 140. Specifically, the connecting part 142a can be a deep hole structure, so that the assist rod 300 can be inserted into the connecting part to achieve a plug-in connection. The connecting part 142a and the assist rod 300 can also be detachably connected by means of threaded connection, snap-fit ​​connection, etc., and there is no limitation in this regard. Thus, the assist rod 300 is driven to the third locking slider 140 through the connecting part 142a. The assist rod 300 can be operated manually to drive the third locking slider 140 to slide, and then drive the first locking slider 120 and the second locking slider 130 to slide. Thus, when the first drive cylinder 160 and the second drive cylinder 170 fail, the locking and separation between the test plate 200 and the main body plate 110 can be completed manually, thereby improving the flexibility of the locking device 100.

[0059] In some possible embodiments, the same connection structure as the connection portion 142a may also be provided on the first connector 190, so that the assist rod 300 can be detachably connected to the first connector 190. Specifically, it may be provided at the end position of the first connector 190 to facilitate manual operation of the assist rod 300 to drive the first connector 190 to rotate, thereby driving the first locking slider 120, the second locking slider 130 and the third locking slider 140 to slide.

[0060] In some possible embodiments, the same connection structure as the connection part 142a can also be provided on the transmission rod 180, so that the assist rod 300 can be detachably connected to the transmission rod 180, so as to facilitate manual operation of the assist rod 300 to drive the transmission rod 180 to move back and forth, thereby driving the first locking slider 120, the second locking slider 130 and the third locking slider 140 to slide.

[0061] like Figure 2 As shown, the guide rails 150 on the first locking slider 120 and the second locking slider 130 are grooved, and the guide rails 150 of the first locking slider 120 and the second locking slider 130 are disposed on opposite side surfaces, with the grooves of the guide rails 150 facing each other. The test plate 200 can be disposed between the first locking slider 120 and the second locking slider 130. The fixing pins 210 located on both sides of the test plate 200 can enter the guide rail 150 through the opening 151 and move along the upper groove wall of the guide rail 150.

[0062] like Figure 2As shown, the guide rail 150 on the third locking slider 140 is notched, so that the part connecting the test plate 200 and the fixing pin 210 can be connected to the fixing pin 210 through both sides of the guide rail 150, so that the fixing pin 210 in the middle position of the test plate 200 can pass through. Figure 2 As shown, the angle between the extension direction of the guide rail 150 and the main body plate 110 ranges from 5° to 20°. Therefore, by setting the angle between the extension direction of the guide rail 150 and the main body plate 110 to 5° to 20°, it avoids the situation where the angle between the guide rail 150 and the main body plate 110 is too small, resulting in an excessively long guide rail 150 to achieve the required locking distance between the test plate 200 and the main body plate 110. This would cause the first drive cylinder 160 and the second drive cylinder 170 to slide the first locking slider 120, the second locking slider 130, and the third locking slider 140 over an excessive distance, affecting the layout of the guide rail 150. It also avoids the situation where the angle between the guide rail 150 and the main body plate 110 is too large, resulting in excessive driving force required to drive the first locking slider 120, the second locking slider 130, and the third locking slider 140, thus avoiding narrowing the selection range of drive cylinders and preventing increased equipment costs.

[0063] like Figure 2 As shown, a positioning pin 112 is also vertically disposed on the main body plate 110. Therefore, by providing the positioning pin 112 on the main body plate 110, it can cooperate with the positioning hole 220 on the test plate 200 to position the test plate 200, allowing the test plate 200 to move perpendicular to the main body plate 110 as it approaches it. This improves the stability and accuracy of the connection between the test plate 200 and the main body plate 110.

[0064] Furthermore, there are multiple positioning pins 112; specifically, they can be configured as follows: Figure 2 The three positioning pins 112 shown can be arranged in a triangle. Therefore, by setting multiple positioning pins 112, the test board 200 can be prevented from rotating around the positioning pins 112, thus improving the stability of positioning the test board 200.

[0065] Furthermore, the first drive cylinder 160 and the second drive cylinder 170 can be pneumatic cylinders, hydraulic cylinders, or electric cylinders, and there are no restrictions on this. Preferably, the first drive cylinder 160 and the second drive cylinder 170 can be multiplied cylinders, which can increase the output force of the first drive cylinder 160 and the second drive cylinder 170 by setting multiple layers of pistons.

[0066] like Figure 3As shown, the first drive cylinder 160 is positioned on the main body plate 110 corresponding to the first locking slider 120, and the second drive cylinder 170 is positioned on the main body plate 110 corresponding to the second locking slider 130. The drive rods of the first drive cylinder 160 and the second drive cylinder 170 extend to the left and are fixedly connected to the first locking slider 120 and the second locking slider 130, respectively. Therefore, when driving the first locking slider 120, the second locking slider 130, and the third locking slider 140 to slide, only one of the first drive cylinder 160 or the second drive cylinder 170 needs to be driven. Specifically, the first drive cylinder 160 drives the first locking slider 120 to slide to the left, which in turn drives the second locking slider 130 to slide to the right and the third locking slider 140. Then, the second drive cylinder 170 can drive the second locking slider 130 to slide to the left, which in turn drives the first locking slider 120 to slide to the right and the third locking slider 140 to slide in the opposite direction to the sliding of the first locking slider 120. Therefore, the first drive cylinder 160 and the second drive cylinder 170 can be driven separately, avoiding the damage to the equipment caused by the first locking slider 120, the second locking slider 130, and the third locking slider 140 when they work simultaneously. Furthermore, when the first drive cylinder 160 and the second drive cylinder 170 are pneumatic cylinders, driving them separately reduces the number of air passages for the first drive cylinder 160 and the second drive cylinder 170, making it easier to arrange the air passages for the drive cylinders 160 and 170.

[0067] In some possible embodiments, the first drive cylinder 160 and the second drive cylinder 170 can simultaneously drive the first locking slider 120, the second locking slider 130, and the third locking slider 140 to slide. Specifically, the first drive cylinder 160 drives the first locking slider 120 to slide to the left, which in turn causes the second locking slider 130 to slide to the right, and also causes the third locking slider 140 to slide. Simultaneously, the second drive cylinder 170 can drive the second locking slider 130 to slide to the right, which in turn causes the first locking slider 120 to slide to the left, and also causes the third locking slider 140 to slide in the same direction as the first locking slider 120. Thus, the first drive cylinder 160 and the second drive cylinder 170 can be driven simultaneously, resulting in superimposed driving forces. Figure 4 for Figure 1 A schematic diagram of the three-dimensional structure of the test board 200; Figure 5 for Figure 1 A schematic diagram of the lower orthographic projection of the test board 200; Figure 6 for Figure 1 A schematic diagram of the upper orthographic projection of the test board 200; Figure 7 This is a schematic diagram showing the connection between the fixing pin 210 and the guide rail 150. (See diagram below.) Figures 4-7As shown, the test plate 200 can be, for example, a rectangular plate or an irregularly shaped component. Holes can be provided on the test plate 200, and electronic components can be fixed thereon by means such as welding. Fixing pins 210 are provided on both sides and in the middle of the test plate 200, with the pins 210 positioned corresponding to the openings 151 of the guide rails 150 on the first locking slider 120, the second locking slider 130, and the third locking slider 140. Thus, when the test plate 200 is mounted on the main body plate 110, the fixing pins 210 on the test plate 200 can enter the guide rails 150 through the openings 151. Then, the first locking slider 120, the second locking slider 130, and the third locking slider 140 can slide under the drive of the drive cylinder, causing the fixing pins 210 to move along the guide rails 150 and gradually approach the main body plate 110.

[0068] like Figures 4-6 As shown, a roller 211 can also be provided on the fixing pin 210. The size of the roller 211 is adapted to the guide rail 150 and can enter the guide rail 150 through the opening 151. By providing the roller 211 on the fixing pin 210, the frictional force when the fixing pin 210 slides in the guide rail 150 can be reduced. Therefore, the resistance when locking the test plate 200 can be reduced, and the applicability of the testing machine 10 can be improved.

[0069] like Figure 4 , Figure 5 As shown, the test plate 200 is also provided with a receiving portion 230, which corresponds to the portion of the third locking slider 140 protruding from the upper surface of the main body plate 110. The receiving portion 230 can be in the shape of a groove or a through hole, and can accommodate the portion of the third locking slider protruding from the upper surface of the main body plate 110 when the test plate 200 is locked and fixed on the main body plate 110 and gradually approaches the main body plate 110. The receiving portion 230 can be, for example... Figure 4 , Figure 5 The multiple portions of the third locking slider 140 that protrude from the upper surface of the main body plate 110 are shown in a one-to-one correspondence, each accommodating a portion of the third locking slider 140 protruding from the upper surface of the main body plate 110. Alternatively, a single accommodating portion 230 may be provided to accommodate the multiple portions of the third locking slider 140 protruding from the upper surface of the main body plate 110; this is not a limitation.

[0070] like Figure 4 , Figure 5As shown, a positioning hole 220 is provided on the test plate 200 at a position corresponding to the positioning pin 112. Therefore, by providing the positioning pin 112 on the main plate 110 and the positioning hole 220 on the test plate 200, the positioning pin 112 can engage with the positioning hole 220 on the test plate 200 to position the test plate 200, allowing the test plate 200 to move perpendicular to the main plate 110 as it approaches the main plate 110. This improves the stability and accuracy of the connection between the test plate 200 and the main plate 110.

[0071] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present application has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A locking device, characterized in that, include: Main body panel; A first locking slider, a second locking slider, and a third locking slider are arranged parallel to each other on the main body plate and are slidably connected to the main body plate. The third locking slider is located at the middle position between the first and second locking sliders and is connected by transmission. Guide rails are provided on the first, second, and third locking sliders, extending along their sliding direction. One end of the guide rail is farther from the main body plate than the other end, and an opening is formed on each of the first, second, and third locking sliders. Multiple third locking sliders are provided, and adjacent first, second, and third locking sliders slide in opposite directions, as do the openings of the guide rails. A drive cylinder is disposed on the main body plate and is pulsatorically connected to the first locking slider, the second locking slider, and the third locking slider. The drive cylinder drives the first locking slider, the second locking slider, and the third locking slider to slide from the other end of the guide rail toward one end of the guide rail. The drive cylinder includes a first drive cylinder and a second drive cylinder respectively disposed at corresponding positions of the first locking slider and the second locking slider, for simultaneous driving to provide superimposed driving force.

2. The locking device according to claim 1, characterized in that, The plurality of the third locking sliders are symmetrically arranged between the first locking slider and the second locking slider.

3. The locking device according to claim 2, characterized in that, The third locking sliders are arranged in pairs and in parallel.

4. The locking device according to claim 1, characterized in that, Also includes: An assist rod is connected to the third locking slider via a transmission mechanism.

5. The locking device according to claim 1, characterized in that, The angle between the extension direction of the guide rail and the main body plate ranges from 5° to 20°.

6. The locking device according to claim 1, characterized in that, Also includes: A positioning pin is vertically disposed on the main body plate.

7. The locking device according to claim 1, characterized in that, Also includes: The transmission rod connects the first locking slider, the second locking slider, and the third locking slider. The first locking slider, the second locking slider, and the third locking slider are located on the same side of the transmission rod.

8. A testing machine, characterized in that, include: A locking device, wherein the locking device is any one of claims 1-7; The test board is used to mount the device under test. Fixing pins are provided on both sides and the middle of the test board. The fixing pins enter the guide rail through the openings on the first locking slider, the second locking slider and the third locking slider.

9. The testing machine according to claim 8, characterized in that, The fixing pin is equipped with rollers.

10. The testing machine according to claim 8 or 9, characterized in that, The main body plate is provided with a positioning pin, and the test plate is provided with a positioning hole at the position corresponding to the positioning pin.

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