Fool-proof structure for preventing cable from being pulled and test fixture

Abstract

A fool-proof structure for preventing cable pulling and a test fixture, the test fixture comprises a box cover and a mainboard carrier plate, a to-be-tested plate is clamped between the box cover and the mainboard carrier plate, a connector is installed on the to-be-tested plate, a cable head of a high-speed cable is detachably connected to the to-be-tested plate through the connector, the fool-proof structure comprises: a sliding plate; a barrier plate; the first buckle is mounted on the sliding plate; the second buckle is mounted on the box cover; when the cable head is in an installation state of being inserted into the connector, the cable head is located on a sliding path of the blocking plate, when the blocking plate abuts against the cable head, the blocking plate is prevented from continuously sliding in the direction facing the connector, the first buckle is located at the position where the first buckle and the second buckle are clamped and buckled, and movement of the mainboard carrier plate is limited. According to the fool-proof structure provided by the embodiment of the invention, the tester can be guided to release the connection of the cable and then open the mainboard carrier plate from the structural design, so that the cable pulling phenomenon is avoided, and the possibility of damaging the board and the cable is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of server mainboard testing equipment, and particularly relates to a fool-proof structure for preventing cable pulling and a testing fixture. BACKGROUND

[0002] With the development of electronic technology, more and more electronic devices have been widely used. The server is an important part of electronic devices and is a device for providing computing services. According to the hardware configuration, the server includes: tower server, rack server, blade server and super large scale server. Similar to the hardware architecture of general-purpose computers, each server is composed of various hardware boards, such as computing modules, storage modules, cases, fan modules, etc. The multiple boards in the server are generally interconnected by cables or connectors, so in order to avoid connection failure, the mainboard, hard disk backboard, fan backboard or power backboard need to be tested before connection before the server is assembled.

[0003] In the related art, when the testing fixture is used to test the mainboard or hard disk backboard, the mainboard carrier board is used to fix the mainboard or hard disk backboard (also referred to as the measured board) on the box cover of the testing fixture, and then the measured board and the test board are connected through the high-speed cable to complete the test. However, with the popularization of PCIE (Peripheral Component Interconnect Express, Peripheral Component Interconnect Express) 5.0 high-speed link technology in servers, it is required that the length of the high-speed cable of the testing fixture is as short as possible, so the high-speed cable of the testing fixture is getting shorter and shorter. In order to adapt to the requirement of shortening the length of the high-speed cable, the testing fixture is improved from the vertical docking direction progressive pressing structure (the measured board and the test board are located at different heights) to the horizontal docking direction progressive pressing structure (the measured board and the test board are basically located at the same height, or at least the height difference is very small). In this way, under the condition that the physical distance between the measured board and the test board is close, the signal transmission delay and loss can be minimized, and the high-speed cable can maintain the shortest length. For example, the length of the high-speed cable of the vertical docking testing fixture is generally required to be 800mm, and the length of the high-speed cable of the horizontal docking testing fixture can be as low as 200mm.

[0004] Because the mainboard carrier plate and the box cover of the test fixture are fastened together, when the box cover is turned over, the mainboard carrier plate will be turned over; when maintenance or replacement of the board under test is performed, the fastening screws of the mainboard carrier plate need to be loosened, at this time, the mainboard carrier plate will move downward, if the cable is not unplugged and the cable is not long enough, the cable or the mainboard connector connected with the cable will be pulled, resulting in that the fastening structure or the cable structure of the connector is pulled off, or the PIN pin of the connector is damaged, causing the board under test to be scrapped. At present, there is no related structure to prevent the above-mentioned situation, only relying on the institutional means to require the test personnel to unplug the cable before opening the mainboard carrier plate to avoid the cable pulling problem, but it cannot completely avoid the occurrence of the cable pulling problem, which needs to be solved urgently. Utility model content

[0005] In order to solve the above-mentioned problems, in the embodiments of the present application, a cable pulling prevention foolproof structure and a test fixture are provided, which can guide the test personnel to first release the connection of the cable and then open the mainboard carrier plate from the structural design, thereby avoiding the occurrence of the cable pulling phenomenon and reducing the possibility of the occurrence of the board damage and cable damage phenomenon.

[0006] In the embodiments of the present application, the following technical solutions are adopted:

[0007] In the first aspect, the embodiments of the present application provide a cable pulling prevention foolproof structure applied to a test fixture, the test fixture comprising a box cover and a mainboard carrier plate, a board under test being clamped between the box cover and the mainboard carrier plate, a connector being installed on the board under test, a cable head of a high-speed cable being detachably connected to the board under test through the connector, the cable pulling prevention foolproof structure comprising: a sliding plate, the sliding plate being installed on the mainboard carrier plate and being slidable on the mainboard carrier plate in a first direction, the first direction being a direction away from or towards the connector; a blocking plate, the blocking plate being installed on a side of the sliding plate facing the connector and being linked with the sliding of the sliding plate; a first buckle, the first buckle being installed on the sliding plate and being linked with the sliding of the sliding plate; a second buckle, the second buckle being installed on the box cover; wherein when the first buckle slides away from the connector along with the sliding plate, the first buckle can slide to a position where the first buckle is buckled and engaged with the second buckle, the buckling and engagement of the first buckle and the second buckle fixing the mainboard carrier plate on the box cover; when the cable head is in an installed state of being plugged into the connector, the cable head is located on a sliding path of the blocking plate, and when the blocking plate abuts against the cable head, the continuous sliding of the blocking plate in the direction towards the connector is blocked, at this time, the first buckle is in the position where the first buckle is buckled and engaged with the second buckle, and the movement of the mainboard carrier plate is limited.

[0008] Therefore, the foolproof structure provided by the embodiment of the application determines whether the mainboard carrier plate can be opened by using the spatial position relationship of whether the cable head of the high-speed cable is plugged into the connector, so as to guide the tester to pull out the cable head when maintaining or replacing the tested board, that is, to guide the tester to first release the connection of the cable and then open the mainboard carrier plate from the structural design, so as to avoid the cable pulling phenomenon and reduce the possibility of the board damage and wire damage.

[0009] As an implementable embodiment, the foolproof structure further comprises a guide mechanism mounted on the mainboard carrier plate and used for limiting the sliding direction of the sliding plate to be the first direction; the guide mechanism comprises two sliding rails arranged in parallel with each other, and the sliding plate is slidingly mounted on the sliding rails, so that the sliding of the sliding plate is more stable, so that the blocking plate can be precisely docked with the cable head.

[0010] As an implementable embodiment, the sliding rails are provided with limiting blocks used for limiting the sliding interval of the sliding plate.

[0011] As an implementable embodiment, the first buckle is any one of a through hole, a groove, a quick connector, an elastic buckle and a protrusion.

[0012] In this embodiment, any one of a through hole, a groove, a quick connector, an elastic buckle and a protrusion can be used as the connection mode of the first buckle and the second buckle, which can be selected according to actual needs.

[0013] As an implementable embodiment, the second buckle is a quick connector, and the quick connector is plugged into the first buckle to complete the buckling.

[0014] As an implementable embodiment, the first buckle is a protrusion in the shape of an inverted U, and the protrusion has lugs extending outward from both ends of the opening of the protrusion, and the protrusion is detachably mounted on the sliding plate through the lugs.

[0015] As an implementable embodiment, the second buckle is arranged in the shape of Z, and the end of the second buckle is plugged into the socket formed by the protrusion and the sliding plate to realize quick fixing or detaching of the first buckle and the second buckle.

[0016] As an implementable embodiment, a plurality of blocking plates are arranged, and the shape of the blocking plate comprises any one of a Z shape and an L shape. Different shapes and positions of the blocking plates are arranged for different specifications and positions of the cable head, so that the sliding of the sliding plate is limited by a plurality of cable heads, thereby improving the applicability of the foolproof structure and applying the foolproof operation to different specifications and positions of the cable head.

[0017] As an implementable embodiment, the first buckles and the second buckles are provided in plurality; and the plurality of first buckles are uniformly arranged on the sliding plate in the second direction; and the plurality of second buckles are arranged on the box cover in one-to-one correspondence with the first buckles.

[0018] In this embodiment, through the provision of the plurality of first buckles and the plurality of second buckles, when the two buckles are buckled, the fixation of the mainboard carrier plate and the box cover is more stable, the possibility of damage of a single first buckle and a single second buckle due to excessive pressure is reduced, and the service life of the foolproof structure is prolonged.

[0019] In a second aspect, the application further provides a test fixture, characterized in that the test fixture comprises a box cover, a mainboard carrier plate, and a foolproof structure as described in the first aspect, a to-be-tested board is clamped between the box cover and the mainboard carrier plate, a connector is mounted on the to-be-tested board, and a cable head of a high-speed cable is detachably connected to the to-be-tested board through the connector.

[0020] It can be understood that the beneficial effects of the test fixture described in the second aspect can be referred to the related description of the first aspect, which will not be described herein again.

[0021] In summary, the foolproof structure in the embodiments of the application has at least one of the following advantages:

[0022] 1. Foolproofness can be achieved: the structure uses the orientation limitation of the cable head to guide the tester to pull out the cable when opening the mainboard carrier plate, thereby preventing the phenomenon of damaging the board and damaging the cable caused by cable pulling;

[0023] 2. Strong reusability: the foolproof structure has a wide coverage, and the same structure can be applied to different types of high-speed cable heads, and can simultaneously achieve the foolproofness of multiple interfaces;

[0024] 3. High coverage: the scheme has a simple structure, the structural parts have no complex features, the standard parts are low in price, the processing and procurement costs are low, and the adaptability and expandability are strong, and the scheme can cope with the foolproofness of multiple interfaces. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings used in the following description of the embodiments are briefly described.

[0026] In each of the drawings, similar elements are denoted by like reference numerals. For the purpose of clarity, not every component is drawn to scale in the drawings, and some features can be exaggerated or omitted in order to illustrate and explain the application more clearly.

[0027] Figure 1 A conventional vertical direction docking test fixture is shown;

[0028] Figure 2A test fixture provided by an embodiment of the application is shown in a horizontal direction;

[0029] Figure 3 A structure diagram after the mainboard carrier plate is placed down in the test fixture in Figure 2

[0030] Figure 4 A principle diagram of a fool-proof structure for preventing cable pulling provided by an embodiment of the application is shown;

[0031] Figure 5 A principle diagram of the fool-proof structure in another state in Figure 4

[0032] Figure 6 An implementation structure diagram of the fool-proof structure for preventing cable pulling provided by an embodiment of the application is shown;

[0033] Figure 7 A structure diagram of the fool-proof structure in another view in Figure 6

[0034] In the figure, 1, a board under test; 11, 11L, 11Z, a connector; 2, a high-speed cable; 21, a cable head; 3, a box cover; 4, a box body; 5, a mainboard carrier plate; 6, a test board; 7, a sliding plate; 71, 71L, 71Z, a blocking plate; 72, a first buckle; 721, a lug; 73, a second buckle; 74, a spherical buckle; 8, a sliding rail; 9, a limiting block.

[0035] The technical solutions in the embodiments of the application will be described below with reference to the drawings in the embodiments of the application.

[0036] In the description of the application, it should be understood that the orientations or positional relationships indicated by the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0037] ​​​In addition, the terms "first", "second", etc. are used herein only to describe different instances, and do not imply or suggest relative importance or a number of the technical features indicated. Thus, the features defined as "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0038] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0040] Figure 1 A conventional vertical direction docking test fixture is shown. Referring to Figure 1 In the conventional test fixture, the test fixture structure for testing the mainboard and the hard disk backplane (also referred to as the test board 1' in the present embodiment) is generally designed to use the vertical docking method. The structure scheme designs the positions of the test board 1' and the test board (not shown in the figure) to be far apart, for example, the test board 1' is installed outside the box cover 3', and the test board is installed inside the box body 4' of the test fixture. The test board 1' and the test board need to use high-speed cables 2' for signal communication, which makes the high-speed cable 2' to be wired in the direction and path Figure 1The length of the high-speed cable 2' between the box cover 3' and the box body 4' (the part of the black arrow) is usually required to reach 600mm-800mm. It should be noted that the role of the test board is to connect, protect, condition and interface conversion with the test board, to ensure that the test board can be connected and interacted with the test fixture normally and accurately during the test process.

[0041] With the popularization of PCIE5.0 high-speed link technology in servers, the length of the high-speed cable of the test fixture is required to be as short as possible, and the structure scheme is improved to a horizontal direction docking structure to adapt to the layout of the short length cable. Figure 2 A test fixture provided by an embodiment of the present application is shown. As shown in Figure 2 , the test fixture includes a hollow box body 4 and a box cover 3 buckled at the opening of the box body 4, one side of the box cover 3 is hinged to the box body 4, so that the box cover 3 can be flipped to open the box body 4 relative to the hinged side of the box body 4. A mainboard carrier plate 5 is installed on the side of the box cover 3 facing the box body 4 to support the test of the test board 1, and a test board 6 is installed on the side of the box cover 3 away from the box body 4.

[0042] Figure 3 The structure diagram of the mainboard carrier plate 5 in the test fixture in Figure 2 after being lowered is shown. Referring to Figure 2 and Figure 3 , in order to make the distance between the test board 1 and the test board 6 closer, after the test board 1 is installed on the mainboard carrier plate 5, the mainboard carrier plate 5 is installed and attached to the side of the box cover 3 facing the box body 4. In this way, the test board 1 and the test board 6 are respectively installed on the upper and lower sides of the box cover 3, the distance between them is shortened, and the length of the high-speed cable 2 connecting them is shortened to about 200mm.

[0043] In order to test the stability, in the embodiment, the mainboard carrier plate 5 and the box cover 3 of the test fixture are fastened together, for example, after one side of the mainboard carrier plate 5 is hinged to the side of the box cover 3 facing the box body 4, the remaining positions are fixedly connected by fastening screws. Since the mainboard carrier plate 5 and the box cover 3 are fastened together, when the box cover 3 is opened, the mainboard carrier plate 5 will also be opened together with the box cover 3. However, the structural scheme of the test fixture needs to open the mainboard carrier plate 5 when daily maintenance or replacement of the vulnerable parts is needed. Since one side of the mainboard carrier plate 5 is hinged to the box cover 3, when the fastening screws at the other positions on the mainboard carrier plate 5 are loosened, the mainboard carrier plate 5 will be flipped at the hinge with the box cover 3 to make the mainboard carrier plate 5 fall down. However, if the high-speed cable 2 is not unplugged when the mainboard carrier plate 5 is disassembled, the cable will be pulled due to insufficient length. The cable itself may be pulled off or damaged, especially the high-frequency high-speed signal line, which will affect the transmission quality of the test signal and even cause test failure. In the embodiment, the cable head 21 at one end of the high-speed cable 2 is usually connected to the connector 11 of the board under test 1. If the pulling is too large, the fastening structure of the connector 11 will be damaged or the connector 11 itself will fall off. If the pulling force is too large, the PIN pin of the connector 11 may be directly damaged, causing poor contact and signal transmission interruption, and in serious cases, the board under test 1 (such as the mainboard) may be scrapped.

[0044] Therefore, in the embodiment of the present application, a cable-pulling-preventing foolproof structure is provided between the box cover 3 and the mainboard carrier plate 5 of the test fixture. By utilizing the spatial position of the cable head 21 of the high-speed cable 2 when connected to the board under test 1, the linkage with the foolproof structure is realized, for example, when the high-speed cable 2 is not unplugged, the foolproof structure fixes the mainboard carrier plate 5 on the box cover 3 and cannot be opened, thereby achieving the purpose of guiding the tester to first remove the high-speed cable 2 from the structure before opening the mainboard carrier plate 5, thereby avoiding the occurrence of cable pulling and reducing the possibility of board damage and line damage. It should be noted that the first direction (indicated as the X-axis direction in the figure) in the embodiment of the present application is the length direction of the test fixture, the second direction (indicated as the Y-axis direction in the figure) is the width direction of the test fixture, and the third direction (indicated as the Z-axis direction in the figure) is the height direction of the test fixture.

[0045] It can be understood that foolproof is a preventive and corrective behavior constraint method that uses a limitation method to avoid errors, so that the operator can directly and correctly complete the correct operation without paying attention and without experience and professional knowledge. In order to facilitate understanding of the technical scheme of the present application, the principle of the foolproof structure of the embodiment of the present application will be described in detail.

[0046] Figure 4 A principle schematic diagram of a cable-pulling-preventing foolproof structure provided by the embodiment of the present application is shown. Figure 5 AFigure 4 Principle diagram of the fool-proof structure in another state. As shown in Figure 4 and Figure 5 shown, the fool-proof structure mainly includes a buckle mechanism, a guide mechanism, a linkage mechanism and a blocking mechanism. The split structure of the buckle mechanism is respectively installed on the box cover 3 and the linkage mechanism, to follow the sliding of the linkage mechanism, to open or fix the connection of the mainboard carrier plate 5 and the box cover 3. The guide mechanism is installed on the mainboard carrier plate 5, to provide the sliding guide of the linkage mechanism in the first direction. The blocking mechanism is used to link with the cable head 21 of the high-speed cable 2, and when the cable head 21 is plugged into the connector 11 of the measured board 1, the position is in the sliding path of the blocking mechanism in the first direction, which can limit the sliding distance of the blocking mechanism in the first direction, so that the sliding distance of the blocking mechanism cannot meet the unlocking distance of the buckle mechanism, and the buckle mechanism is in the closed position, that is, the buckle mechanisms on the box cover 3 and the mainboard carrier plate 5 are buckled and connected with each other, so that the mainboard carrier plate 5 cannot be opened. Continue to refer to Figure 5 , only after the tester pulls out the cable head 21 of the high-speed cable 2, the blocking mechanism without limitation can continue to slide to the right, that is, towards the connector 11, until the buckle mechanism is unlocked and in the open position, the buckle mechanisms on the box cover 3 and the mainboard carrier plate 5 are separated from each other, at this time the mainboard carrier plate 5 can be taken off from the box cover 3, and the mainboard carrier plate 5 can be opened. Thus, the purpose of guiding the tester to pull out the cable head 21 when opening the mainboard carrier plate 5 is achieved.

[0047] The above is the introduction of the principle and process of the fool-proof structure provided by the embodiment of the present application. Based on the above content, the technical scheme of the present application will be described in detail in the following specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.

[0048] Figure 6 An implementation structure diagram of a fool-proof structure for preventing cable pulling provided by an embodiment of the present application is shown. As shown in Figure 6 , the fool-proof structure is applied in a test fixture, including a sliding plate 7, a blocking plate 71, a first buckle 72 installed on the sliding plate 7 and a second buckle 73 installed on the box cover 3. The first buckle 72 can link with the sliding of the sliding plate 7, so that the second buckle 73 is buckled on the first buckle 72, to fix the mainboard carrier plate 5 on the box cover 3.

[0049] Specifically, the sliding plate 7 is a main structure of the fool-proof structure, and is used to bear installation and linkage of other components of the fool-proof structure. For example, the sliding plate 7 is slidingly connected to the main board carrier plate 5 and is located on the upper side of the connector 11 of the measured board 1. The sliding plate 7 can linearly reciprocate on the main board carrier plate 5 in a first direction. It can be understood that the first direction is a direction away from or towards the connector 11. Alternatively, in the embodiment, the sliding plate 7 is a long strip-shaped plate, and a slide rail 8 used to support the sliding of the sliding plate 7 is installed on both sides of the sliding plate 7 in a second direction of the main board carrier plate 5. For example, the sliding plate 7 is clamped to the slide rail 8 through a spherical buckle 74, and the core structure of the spherical buckle 74 is a spherical component, which is usually a metal or plastic ball. The spherical buckle 74 can freely slide in the slide rail 8 through the spherical structure, so that the sliding plate 7 moves smoothly on the track. At the same time, the spherical buckle 74 can also support the weight of the sliding plate 7, so as to avoid the plate body from being separated from the track. For example, the spherical buckle 74 can be embedded in the corresponding guide groove or hole (not shown in the figure) of the slide rail 8, and the sliding plate 7 and the guide rail are connected together through clamping, so as to provide stable and reliable connection, thereby enhancing the stability and safety of the overall structure.

[0050] In some embodiments, a special-shaped sliding groove (not shown in the figure), such as a dovetail-shaped or T-shaped sliding groove, can be formed on the slide rail 8, and a sliding block is installed on the side wall of the sliding plate 7 facing the slide rail 8. The sliding block and the sliding groove are dovetail-shaped or T-shaped, so that the sliding block can stably slide in the sliding groove of the slide rail 8, which is not strictly limited in the present application.

[0051] In one embodiment, a limiting block 9 used to limit the sliding distance of the sliding plate 7 can be installed on any one or both of the slide rails 8. For example, the limiting block 9 is arranged on the movement path of the sliding plate 7, and when the sliding plate 7 slides to abut against the side wall of the limiting block 9, the maximum sliding stroke of the sliding plate 7 is reached, so as to limit the sliding distance of the sliding plate 7 and reduce the possibility of the sliding plate 7 sliding off the slide rail 8, so that the sliding is more stable. Alternatively, two limiting blocks 9 are arranged, and the two limiting blocks 9 are located on both sides of the sliding plate 7 in the first direction. The distance between the two limiting blocks 9 is the maximum stroke of the sliding plate 7. For example, the limiting block 9 can be bonded, clamped or screwed on the slide rail 8, which is not limited in the present application.

[0052] The blocking plate 71 is installed on the side of the sliding plate 7 facing the connector 11 and can be linked with the sliding of the sliding plate 7. The blocking plate 71 is located above the connector 11 of the measured board 1 and is mainly used to abut the side wall of the cable head 21 connected to the upper side of the connector 11, so as to limit the continuous sliding of the sliding plate 7 towards the connector 11. After the cable head 21 is pulled out from the connector 11 on the measured board 1, the blocking plate 71 can be separated from the abutment with the side wall of the cable head 21, so that the sliding plate 7 can continuously move towards the connector 11 after the blocking plate 71 loses the limitation of the cable head 21.

[0053] In one embodiment, the cable head 21 of the high-speed cable 2 includes multiple types such as MCIO (Micro Connector Input Output), UBC (Universal Backplane Connector), QSFP (Quad Small Form-factor Pluggable), HDMI (High-Definition Multimedia Interface) in addition to PCIe. In addition, the positions of the connectors 11 corresponding to the above-mentioned different types of cable heads 21 on the measured board 1 are also different, so in order to improve the applicability of the foolproof structure, the number and shape of the blocking plates 71 are also provided in multiple ways in the present embodiment. For example, the connectors 11 on the measured board 1 are provided with two and are located at different positions of the measured board 1. Correspondingly, the blocking plates 71 are also provided with two.

[0054] Figure 7 A perspective view of the foolproof structure from another angle is shown in Figure 6 A perspective view of the foolproof structure from another angle is shown in Figure 7As shown, in order to enable the blocking plate 71 to abut against the side wall of the cable head 21 on different connectors 11, in this embodiment, the shape of the blocking plate 71 includes any one of Z shape and L shape. For example, for the connector 11L on the measured board 1 closer to the sliding plate 7, the blocking plate 71L is provided in L shape. One side of the L-shaped blocking plate 71L is lap-jointed and fixed on the sliding plate 7, and the other side extends towards the measured board 1. According to the length of the one side of the L-shaped blocking plate 71L lap-jointed on the sliding plate 7 extending out of the sliding plate 7, the distance between the L-shaped blocking plate 71L and the closer connector 11L is adjusted, so that when the other side of the L-shaped blocking plate 71L abuts against the side wall of the cable head 21, the first buckle 72 and the second buckle 73 on the sliding plate 7 remain in the closed position. Alternatively, for another connector 11Z on the measured board 1 farther away from the sliding plate 7, a Z-shaped blocking plate 71Z can be used, which includes three vertically connected sides. One side of the Z-shaped blocking plate 71Z is used to lap-joint and fix on the sliding plate 7, one vertical side extends towards the measured board 1 to compensate for the distance between the sliding plate 7 and the cable head 21 in the third direction, and the last side extends in the first direction and can abut against the side wall of the cable head 21 farther away from the sliding plate 7 when following the sliding plate 7, and when abutting, the first buckle 72 and the second buckle 73 remain in the closed position. The developer can design according to different positions and types of cable heads 21, and the number and shape of the blocking plate 71 are not strictly limited in this application as long as the cable head 21 can limit the sliding of the blocking plate 71. For example, one side of the blocking plate 71 can be bonded or welded to the side wall of the sliding plate 7; or one side of the blocking plate 71 can be fixed to the side wall of the sliding plate 7 by screws; or the sliding plate 7 can be provided with a clamping groove, and one side of the blocking plate 71 can be clamped in the clamping groove, and the fixing methods of the two are not limited in this application.

[0055] In this embodiment, when the first buckle 72 follows the sliding plate 7 to slide away from the connector 11, it can slide to the position where it is buckled and engaged with the second buckle 73, and the buckling and engagement of the first buckle 72 and the second buckle 73 fix the mainboard carrier plate 5 on the box cover 3. When the cable head 21 is in the installed state of being plugged into the connector 11, the cable head 21 is located in the sliding path of the blocking plate 71, and when the blocking plate 71 abuts against the cable head 21, the blocking plate 71 is blocked from continuously sliding in the direction towards the connector 11, and at this time the first buckle 72 is in the position of being buckled and engaged with the second buckle 73, limiting the movement of the mainboard carrier plate 5. In this way, the spatial positional relationship of whether the cable head 21 of the high-speed cable 2 is plugged into the connector 11 is used to determine whether the mainboard carrier plate 5 can be opened, so as to guide the tester to pull out the cable head 21 when maintaining or replacing the measured board 1.

[0056] For example, in the process of dismounting the mainboard carrier plate 5, if the user misoperates and first dismounts the fastening screws of the mainboard carrier plate 5 and then moves the mainboard carrier plate 5 downward, the first buckle 72 and the second buckle 73 are in the buckling and clamping position, at this time, the mainboard carrier plate 5 has lost the fixation of the fastening screws, but is still fixed on the box cover 3, if the mainboard carrier plate 5 is to be dismounted, the tester needs to release the buckling and clamping of the first buckle 72 and the second buckle 73, and needs to move the sliding plate 7 to move the sliding plate 7 toward the connector 11 to release the buckling and clamping restriction of the first buckle 72 away from the second buckle 73; when moving toward the connector 11, the sliding plate 7 will drive one end of the blocking plate 71 to abut against the proximal end surface of the cable head 21, the sliding plate 7 cannot continue to slide, the first buckle 72 cannot move away from the second buckle 73, that is, it is ensured that the mainboard carrier plate 5 cannot continue to be dismounted from the box cover 3; only when the cable head 21 is pulled out, the restriction of the cable head 21 on the blocking plate 71 can be released, and then the sliding plate 7 can continue to move toward the connector 11 until the second buckle 73 releases the buckling and clamping with the first buckle 72, at this time, the mainboard carrier plate 5 can be dismounted from the box cover 3 to complete the subsequent maintenance or replacement operation. That is, in the embodiment, the tester can be guided from the structural design to release the connection of the cable and then open the mainboard carrier plate 5, so as to avoid the occurrence of cable pulling phenomenon and reduce the possibility of damage to the board and the cable.

[0057] Further, in order to make the buckling part more stable in fixing between the mainboard carrier plate 5 and the box cover 3, the first buckle 72 and the second buckle 73 are provided in plurality, for example, two or three. For example, two first buckles 72 are uniformly arranged on the sliding plate 7 along the second direction; two second buckles 73 are arranged on the box cover 3 corresponding to the first buckles 72.

[0058] In order to ensure the smoothness of the sliding plate 7 when moving toward the first direction, in some embodiments related to the first buckle 72, the first buckle 72 can be in any one of the forms of a through hole, a groove, a quick connector, an elastic buckle and a protrusion. For example, the first buckle 72 can be selected as a through hole or a groove, and the second buckle 73 corresponds to a hook block that can be buckled through or hooked in the groove. The first buckle 72 can also be connected with the second buckle 73 in the modes of insertion, buckling, elastic connection and the like to realize quick buckling and clamping.

[0059] Alternatively, the second buckle 73 can be a quick connector, and the first buckle 72 is also provided as a quick connector matching the quick connector, that is, the second buckle 73 and the first buckle 72 are respectively a male head and a female head, the second buckle 73 can be directly inserted into or pulled out of the first buckle 72 to realize quick buckling or dismounting.

[0060] Alternatively, the second buckle 73 can be an elastic piece, and the first buckle 72 is correspondingly set as an elastic buckle matched with the elastic piece, the second buckle 73 is elastically connected with the elastic buckle through the elastic piece and the elastic buckle, so as to realize the quick buckling or dismounting of the first buckle 72 and the second buckle 73. Optionally, the elastic piece and the elastic buckle are made of metal material.

[0061] Alternatively, the second buckle 73 can be a rod-shaped part, and the first buckle 72 is correspondingly set as a convex with a socket matched with the rod-shaped part, the second buckle 73 is connected with the convex through the socket, and the rod-shaped part of the second buckle 73 is pulled out of the socket of the convex to realize the unlocking of the two. Specifically, refer to Figure 6 and Figure 7 , the first buckle 72 is a reverse U-shaped convex, and the convex has lugs 721 extending outward at both ends of the opening of the convex, the convex is detachably mounted on the sliding plate 7 through the lugs 721, for example, the convex is fixed on the sliding plate 7 through bolts, the first buckle 72 mounted on the sliding plate 7 and the sliding block form a socket for the rod-shaped part of the second buckle 73 to be inserted into. The second buckle 73 is a Z-shaped rod-shaped part, and the second buckle 73 is optionally attached, clamped or screwed on the box cover 3, the end of the second buckle 73 is inserted into the socket formed by the convex and the sliding plate 7, so as to realize the quick fixing or unlocking of the first buckle 72 and the second buckle 73.

[0062] Optionally, the first buckle 72 and the second buckle 73 can be made of high-strength and wear-resistant materials and be formed by one-step molding such as injection molding or stamping. For example, the first buckle 72 and the second buckle 73 can be made of plastic or metal, which is not limited in the present application. When the first buckle 72 and the second buckle 73 are made of metal, the metal can be aluminum or copper, or can be galvanized steel plate, aluminum alloy plate, stainless steel plate or titanium alloy plate, etc. The above-mentioned metal materials have certain strength and wear resistance. When the first buckle 72 and the second buckle 73 are made of plastic, the plastic can be general-purpose plastic, engineering plastic or special plastic, etc. For example, the plastic can be polycarbonate (PC), polypropylene (PP), polyethylene (PE), polyurethane (PU), polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), acrylonitrile butadiene styrene (ABS), polyethylene terephthalate (PET), or a reinforced composite material obtained by adding glass fiber to PC, PPS, PP, PE, PU, PBT, PPS or ABS. That is, the first buckle 72 and the second buckle 73 are made of the above-mentioned plastic materials with certain strength and wear resistance, which facilitates the one-step molding of the first buckle 72 and the second buckle 73, and further improves the supporting and fixing capabilities of the first buckle 72 and the second buckle 73 on the main board carrier plate 5, so as to improve the protection effect on the high-speed cable 2 and the connector 11.

[0063] Thus, the foolproof structure of the embodiment of the application is composed of the first buckle 72, the first buckle 72, the spherical buckle 74, the sliding plate 7, the sliding rail 8 and the blocking plate 71. The idea of the foolproof scheme is that the connector 11 of the mainboard is inserted with the cable head 21, which limits the movement of the blocking plate 71, thereby limiting the movement of the sliding plate 7, so that the first buckle 72 on the sliding plate 7 and the second buckle 73 on the box cover 3 remain in the hooked state. If the connector 11 on the mainboard is not pulled out the cable head 21 according to the maintenance requirements, when the mainboard carrier plate 5 is opened, the second buckle 73 of the box cover 3 restricts the movement of the first buckle 72 of the mainboard carrier plate 5, so that the mainboard carrier plate 5 cannot be opened, thereby playing a role in protecting the cable head 21. If the connector 11 on the mainboard is pulled out the cable head 21 according to the maintenance requirements, the movement of the blocking plate 71 is not limited by the cable head 21, and the sliding plate 7 can move to the right side, so that the first buckle 72 and the second buckle 73 are in the unhooked state, and the mainboard carrier plate 5 can be freely opened. That is, by using the orientation limitation of the cable head 21, the phenomenon of damaging the board and damaging the cable caused by pulling the cable is prevented, the foolproof coverage of the structure is wide, the pull-out cable misoperation of multiple interfaces can be realized at the same time, and the structure is simple, and the processing and procurement costs are low.

[0064] The position relationship, quantity, structure shape and the like of each component of the foolproof structure and the test fixture provided by the embodiment of the application are not limited to the above-described embodiments, and any technical solution realized under the principle of the application is within the protection scope of the present application. Any one or more embodiments or drawings in the specification are within the protection scope of the present application in a suitable manner.

[0065] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the application. Those skilled in the art should understand that although the application is described in detail with reference to the foregoing embodiments, the technical solutions described in the foregoing embodiments can be modified or some technical features can be replaced by equivalents. The modification or replacement does not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions in the embodiments of the application.

Claims

1. A cable-pulling-resistant foolproof structure applied to a test fixture, the test fixture comprising a box cover and a main board carrier, a to-be-tested board being clamped between the box cover and the main board carrier, a connector being installed on the to-be-tested board, and a cable head of a high-speed cable being detachably connected to the to-be-tested board through the connector, characterized in that, The foolproof structure comprises: a sliding plate, which is installed on the mainboard carrier plate and can slide on the mainboard carrier plate in a first direction, the first direction being a direction away from or towards the connector; a blocking plate, which is installed on a side of the sliding plate facing the connector and can be linked with the sliding of the sliding plate; a first buckle, which is installed on the sliding plate and can be linked with the sliding of the sliding plate; a second buckle, which is installed on the box cover; wherein the first buckle can slide to a position where it is buckled with the second buckle when the first buckle slides with the sliding plate in a direction away from the connector, and the buckling of the first buckle with the second buckle fixes the mainboard carrier plate on the box cover; when the cable head is in a state of being plugged on the connector, the cable head is located on the sliding path of the blocking plate, and the continuous sliding of the blocking plate in a direction towards the connector is blocked when the blocking plate abuts against the cable head, at this time, the first buckle is in the position where it is buckled with the second buckle, and the movement of the mainboard carrier plate is limited.

2. The fool-proof structure according to claim 1, wherein a guide mechanism is further included, which is installed on the mainboard carrier plate and is used to limit the sliding direction of the sliding plate to the first direction; the guide mechanism comprises two sliding rails arranged in parallel with each other, and the sliding plate is slidingly installed on the sliding rails.

3. The prevention of stupidity structure according to claim 2, characterized in that, A limiting block is installed on the sliding rail to limit the sliding interval of the sliding plate.

4. The fool-proof structure according to any one of claims 1 to 3, wherein The first buckle is any one of a through hole, a groove, a quick plug, an elastic buckle and a protrusion.

5. The prevention of stupidity structure according to claim 4, characterized in that, The second buckle is a quick plug, and the buckling is completed by plugging the quick plug into the first buckle.

6. The prevention of stupidity structure according to claim 4, characterized in that, The first buckle is a protrusion in the shape of an inverted U, and the protrusion has lugs extending outward from both ends of the opening of the protrusion, and the protrusion is detachably installed on the sliding plate through the lugs.

7. The prevention of stupidity structure according to claim 6, characterized in that, The second buckle is arranged in the shape of Z, and the end of the second buckle can be plugged into the socket formed by the protrusion and the sliding plate.

8. The fool-proof structure according to any one of claims 1 to 7, wherein The blocking plate is arranged in multiple, and the shape of the blocking plate comprises any one of Z and L.

9. The fool-proof structure according to any one of claims 1 to 8, wherein Both the first buckle and the second buckle are arranged in multiple, and multiple first buckles are uniformly arranged on the sliding plate in a second direction; multiple second buckles are arranged on the box cover in one-to-one correspondence with the first buckles.

10. A test fixture, comprising: The box cover and the mainboard carrier plate are arranged with a to-be-tested board therebetween, the to-be-tested board is installed with a connector, and the cable head of a high-speed cable is detachably connected to the to-be-tested board through the connector.

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