CN218157991U - Locking device and test system - Google Patents

Abstract

The embodiment of the application provides a locking device and a test system. Locking device includes at least a set of locking mechanical system, and every locking mechanical system includes: the first locking piece comprises a supporting frame and two groups of guide pieces, and each group of guide pieces comprises one or more than two guide pieces; the second locking part comprises two guide rail assemblies, each guide rail assembly comprises a track, a sliding block and a group of limiting channels arranged on the sliding block, the track is used for being fixedly connected with a first part below the track, and each group of limiting channels comprises one or more than two limiting channels correspondingly matched with the guide part; and when the driving assembly drives the sliding block to move on the track and the guide piece passes through the limiting channel, the limiting channel can apply force for enabling the first locking piece to move towards or away from the first part through the guide piece, so that the connector of the circuit board to be tested on the first locking piece is connected or disconnected with the connector on the first part in a plugging mode. The embodiment of the application is easy to control the plugging angle, and accurate plugging can be realized.

Description

Locking device and test system

Technical Field

The application relates to the technical field of circuit testing, in particular to a locking device and a testing system.

Background

The integrated circuit test is one of the key means for ensuring the performance and quality of the integrated circuit. In testing, an integrated circuit such as an Insulated Gate Bipolar Transistor (IGBT) may be disposed on a Printed Circuit Board (PCB), and then an electrical connector of the PCB and a test head connector of a testing device may be precisely assembled by plugging to achieve electrical connection. In order to ensure reliable connection, the total insertion and extraction force of the PCB and the testing equipment is large, and the PCB and the testing equipment are difficult to operate only by manpower, so that a special locking device is generally adopted for mounting and dismounting.

In the prior art, the locking device which can reliably connect the PCB and the test equipment is prone to force unevenly in the operation process, so that the plugging angle has deviation, accurate plug can not be realized, the connector is prone to damage, and the test efficiency is affected.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a locking device and a test system, when locking and fixing a circuit board to be tested such as a PCB and a first component such as test equipment so that the circuit board to be tested and the first component are connected in a plugging mode, the angle can be easily and accurately controlled, accurate plugging can be realized, accordingly, the connector is prevented from being damaged, and the test efficiency is improved.

Therefore, the embodiment of the application adopts the following technical scheme:

in a first aspect, an embodiment of the present application provides a locking device, where the locking device includes at least one set of locking mechanisms, and each set of locking mechanisms includes: the first locking piece comprises a supporting frame for placing a circuit board to be tested and two groups of guide pieces respectively arranged on two opposite first outer side walls of the supporting frame, wherein each group of guide pieces comprises one or more than two guide pieces arranged at intervals along the length direction of the first outer side wall; the second locking piece comprises two guide rail assemblies respectively positioned on the outer sides of the two first outer side walls, each guide rail assembly comprises a track extending along the length direction of the first outer side wall, a sliding block arranged on the track and a group of limiting channels arranged on the inner side wall, facing the support frame, of the sliding block, the track is used for being fixedly connected with a first part arranged below the support frame, each group of limiting channels comprises one or more than two limiting channels arranged at intervals along the extending direction of the track, and the limiting channels can be correspondingly matched with the guide pieces; when the driving assembly drives the sliding block to move on the track along a first direction to enable the guide piece to pass through the limiting channel, the limiting channel can apply force for enabling the first locking piece to move towards the first part through the guide piece, so that the connector of the circuit board to be tested on the first locking piece is connected with the connector on the first part in a plugging mode, and the locking mechanism is in a locking state; when the driving assembly drives the sliding block to move on the track along the direction opposite to the first direction so that the guide piece passes through the limiting channel, the limiting channel can apply force for enabling the first locking piece to move away from the first part through the guide piece, so that the connector of the circuit board to be tested mounted on the first locking piece is disconnected with the connector on the first part, and the locking mechanism is in an unlocking state.

The locking device of the embodiment of the application, two guide rail assembly of second retaining member are located the outside of two first lateral walls of the support frame of first retaining member, two sets of guide parts set up respectively on two relative first lateral walls of support frame, every guide rail assembly includes the track, slider and a set of spacing passageway of setting on the slider, drive assembly drive slider moves on the track and when making the guide part pass through spacing passageway, spacing passageway can apply the power that makes first retaining member move towards or keep away from first part removal through the guide part, and make the connector of the circuit board that awaits measuring on the first retaining member be connected or break away from the connection through the grafting mode with the connector on the first part, because track and slider can accurate direction, can not appear exerting oneself uneven and influence the problem of direction of motion, thereby when fixing like the test equipment with the first part like PCB to the circuit board that awaits measuring to lock so that both are connected through the grafting mode, easily accurate control plug angle, can be realized, the connector is damaged, and efficiency of software testing is improved.

In a possible implementation manner, the guide member extends along a length direction of the first outer side wall and includes a first flat section, a second flat section, and an inclined section, a first end of the inclined section is close to the bottom surface of the support frame relative to a second end of the inclined section, the first flat section is connected with the first end of the inclined section, and the second flat section is connected with the second end of the inclined section; the first direction is a direction from a first end of the angled section to a second end of the angled section; wherein: the first flat section is positioned in the limiting channel, and the locking mechanism is in an unlocking state; the second flat section is located in the limiting channel, and the locking mechanism is in a locking state. That is to say, in this implementation, because the first flat section and the second flat section of the guide are different in height, the two are connected through the inclined section, so that when the guide passes through the limiting channel, the limiting channel can apply force to the inclined section to move the guide towards or away from the first component, thereby realizing that the connector of the circuit board to be tested on the first locking member is connected or disconnected with the connector on the first component in a plugging manner. The first flat section and the second flat section have a self-locking function, namely when the first flat section is positioned in the limiting channel, the limiting channel does not apply force to the guide piece, and the locking mechanism can be stably positioned in an unlocking state; when the second flat section is positioned in the limiting channel, the limiting channel cannot apply force to the guide piece, and the locking mechanism can be stably in a locking state.

In a possible implementation manner, the limiting channel extends along the length direction of the first outer side wall, and includes a first portion and a second portion that are arranged at intervals along the height direction of the first outer side wall, and the first portion is far away from the track relative to the second portion, where: in the unlocked state, a first end of the guide member adjacent to the bottom surface of the support frame is supportably placed on the second portion; in the locked state, a second end of the guide member, which is away from the bottom surface of the support frame, can be placed in support on the second part; said first portion being capable of urging said guide toward said first member to move said first locking member toward said first member when said slider is moved in said first direction; when the sliding block moves along the direction opposite to the first direction, the second part can push the guide piece along the direction far away from the first part to drive the first locking piece to move far away from the first part. That is, in this implementation, the first portion of the position limiting channel may apply a force to the guide member that moves toward the first component, thereby enabling the connector of the circuit board to be tested on the first locking member to be connected with the connector on the first component in a plugging manner, and the second portion of the position limiting channel may apply a force to the guide member that moves away from the first component, thereby enabling the connector of the circuit board to be tested on the first locking member to be disconnected from the connector on the first component.

In a possible implementation manner, the first portion includes a first roller, the second portion includes a second roller and at least one third roller that are sequentially arranged along the first direction, and the second roller and the first roller are opposite to each other and are arranged at intervals along the height direction of the supporting frame. That is to say, in this implementation, be rolling friction between the spacing passageway that guide and gyro wheel are constituteed, the resistance when guide relative spacing passageway removes is less like this, can improve the stability and the smoothness nature of locking process or unblock process.

In one possible implementation, the drive assembly includes: the two lead screw assemblies are respectively positioned on the outer sides of the two guide rail assemblies, each lead screw assembly comprises a lead screw and a nut which is rotatably sleeved on the lead screw, and the nut is connected with the sliding block; and the driving piece is used for driving the lead screws of the two lead screw assemblies to rotate so that the nut drives the sliding block to move along the track. That is to say, in this implementation, adopt lead screw assembly drive slider to remove, because lead screw assembly itself has self-locking function, can further improve the stability and the smoothness nature of locking process or unblock process.

In one possible implementation, the two lead screw assemblies include a first lead screw assembly and a second lead screw assembly, and the driving member includes: the first belt pulley is connected with one end of a lead screw of the first lead screw assembly; the second belt wheel is connected with one end of a lead screw of the second lead screw assembly; the first belt is sleeved outside the first belt wheel and the second belt wheel; and the hand wheel is connected with one of the first belt wheel and the second belt wheel and is used for driving one of the first belt wheel and the second belt wheel to rotate, so that the first belt drives the other one of the first belt wheel and the second belt wheel to rotate, and the lead screw of the first lead screw assembly and the lead screw of the second lead screw assembly are driven to rotate simultaneously. That is, in this implementation, in order to ensure that the nuts of the two screw assemblies move synchronously, the screws of the two screw assemblies can be driven to rotate simultaneously by the combination of the belt and the belt wheel.

In one possible implementation, the first pulley and the second pulley are located below the support frame, the first belt is located at a first end of each of the first pulley and the second pulley in the axial direction, and the driving member further includes: the second belt is sleeved outside one end of a screw rod of the first screw rod assembly and a second end of the first belt wheel along the axis direction; and the third belt is sleeved at one end of a screw rod of the second screw rod assembly and the outside of a second end of the second belt wheel along the axis direction. That is to say, in this implementation, the driving member may be located below the supporting frame, and is not located above the supporting frame or is flush with the supporting frame, so that interference with the driving member when the supporting frame is taken and placed can be avoided.

In one possible implementation, the first locking member further includes: two groups of positioning pins are respectively arranged at two opposite second outer side walls of the support frame, each group of positioning pins comprises one or more than two positioning pins arranged at intervals along the length direction of the second outer side walls, each positioning pin extends along the height direction of the support frame, and the positioning pins are used for positioning and matching with positioning holes arranged on the circuit board to be tested; and/or, two sets of linear bearings are respectively arranged at the bottom of the support frame and are positioned at two opposite second outer side walls of the support frame, each set of linear bearing comprises more than two linear bearings which are arranged at one or intervals, and the linear bearings are used for being matched with the positioning pins arranged on the first component in a positioning manner. That is to say, in this implementation, in order to facilitate the positioning and installation of the circuit board to be tested, the support frame may be provided with a positioning pin, and the circuit board to be tested is provided with a positioning hole, and the positioning pin and the positioning hole can be in positioning fit. In addition, in order to place the support frame at a proper position of the first component conveniently, a linear bearing can be arranged at the bottom of the support frame, and the linear bearing can be matched with the positioning pin on the first component in a positioning mode.

In a possible implementation manner, each set of the locking mechanisms further includes a first stop block and a second stop block sequentially arranged along the first direction, the first stop block and the second stop block are disposed on the track or the first component and located at two ends of the track, and the slider is capable of moving between the first stop block and the second stop block, where: when the sliding block is in contact with the first stop block, the locking mechanism is in the unlocking state; when the sliding block is in contact with the second stop block, the locking mechanism is in the locking state. That is to say, in this implementation manner, the first stop block and the second stop block may be disposed on the rail or the first component to limit the moving range of the slider, so as to further ensure that the connector of the circuit board to be tested and the first component can be accurately butted.

In a possible implementation manner, the locking device includes a first group of locking mechanisms, the circuit board to be tested includes a first circuit board to be tested disposed on the support frame of the first locking member of the first group of locking mechanisms, the first component corresponding to the first group of locking mechanisms is the test equipment, in the first group of locking mechanisms, the nut is connected to the slider fixedly, the driving component drives the slider along the rail slides, so that the connector of the first circuit board to be tested is connected to or disconnected from the connector of the test equipment through the plugging mode. That is, in this implementation, the locking device may include only the first group of locking mechanisms, and the first group of locking mechanisms may connect or disconnect the connector of the first circuit board to be tested on the supporting frame of the first locking member with or from the connector of the test equipment as the first component by means of plugging.

In a possible implementation manner, the locking device includes a second group of locking mechanisms stacked on the first group of locking mechanisms, the circuit board to be tested includes a second circuit board to be tested disposed on a support frame of a first locking member of the second group of locking mechanisms, a first component corresponding to the second group of locking mechanisms is the support frame of the first group of locking mechanisms, in the second group of locking mechanisms, the nut is detachably connected to the slider, wherein: when the nut is connected with the sliding block, the driving assembly drives the sliding block to slide along the track, so that the connector of the second circuit board to be tested can be connected with or disconnected from the connector of the first circuit board to be tested in a plugging mode; when the nut is not connected with the sliding block, the driving assembly of the first group of locking mechanisms drives the sliding block to move, and the first locking piece of the second group of locking mechanisms and the guide rail assembly can be moved towards the testing equipment or away from the testing equipment together with the first locking piece of the first group of locking mechanisms. That is, in this implementation, the locking device may include a first group of locking mechanisms that may connect or disconnect the connector of the first circuit board to be tested on the support frame of the first locking member with or from the connector of the test equipment as the first component in a plugging manner, and a second group of locking mechanisms that may connect or disconnect the connectors of the adjacent circuit boards to be tested in a plugging manner.

In a possible implementation manner, the second group of locking mechanisms further includes a connecting piece, one end of the connecting piece is rotatably connected to the nut, a limiting groove is provided on a sliding block of the second group of locking mechanisms, and the other end of the connecting piece can rotate between a first position and a second position relative to one end of the connecting piece, wherein: when the sliding block is in the first position, the other end of the connecting piece is positioned in the limiting groove, so that the other end of the connecting piece can be in limiting connection with the sliding block; and when the second position is reached, the other end of the connecting piece is positioned outside the limiting groove, so that the other end of the connecting piece is disconnected with the sliding block. That is, in this implementation, in order to facilitate the driving assembly of the first set of locking mechanisms being able to simultaneously move the first locking member of the first set of locking mechanisms and the locking member of the second set of locking mechanisms without moving the driving assembly of the second set of locking mechanisms, the driving assembly of the second set of locking mechanisms may be detachably connected to the rail assembly via the connecting member.

In a second aspect, an embodiment of the present application provides a test system, where the test system includes: the test equipment is a first component corresponding to a first group of locking mechanisms of the locking device, and a track of the first group of locking mechanisms of the locking device is fixedly connected with the test equipment; at least one circuit board to be tested, wherein each circuit board to be tested is arranged on the first locking piece of each group of locking mechanisms of the locking device; the first group of locking mechanisms are used for enabling the connector of a first circuit board to be tested in the at least one circuit board to be tested to be connected and disconnected with the connector of the testing equipment in a plugging mode; and the second group of locking mechanisms of the locking device is used for connecting and disconnecting the connector of the second circuit board to be tested in the at least one circuit board to be tested with the connector of the first circuit board to be tested in a plugging mode.

Other features and advantages of the present invention will be described in detail in the detailed description of the preferred embodiments that follows.

Drawings

The drawings that accompany the detailed description can be briefly described as follows.

Fig. 1 is a schematic structural diagram of a locking device according to a first embodiment of the present application;

FIG. 2 is a schematic view of a first securing member of the securing apparatus shown in FIG. 1;

FIG. 3 is a schematic bottom view of the first fastening member shown in FIG. 2 after being mounted on a circuit board to be tested;

FIG. 4 is a schematic structural view of a locking device according to a second embodiment of the present application;

FIG. 5 is a schematic top view of the locking device shown in FIG. 4;

FIG. 6 is a schematic view of a partial structure of the locking device shown in FIG. 4;

FIG. 7 is a schematic view of another partial structure of the locking device shown in FIG. 4;

fig. 8 is a schematic structural view of still another partial structure of the locking device shown in fig. 4.

Detailed Description

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

In the description of the present application, the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have particular orientations, be constructed in particular orientations, and be operated, and thus, are not to be construed as limiting the present application.

In the description of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected" and "connected" should be interpreted broadly, such as may be a fixed connection, a removable connection, an interference connection or an integral connection; the specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

An Integrated Circuit (IC) is a circuit with a specific function that integrates a certain number of commonly used electronic components, such as resistors, capacitors, transistors, etc., and the wiring between these components through a semiconductor process. The integrated circuit test is one of the key means for ensuring the performance and quality of the integrated circuit. By comparing the measured output response of the integrated circuit to the expected output, the functionality and performance of the integrated circuit components may be determined or evaluated.

In recent years, the field of integrated circuit testing is continuously developed, and particularly, the quantity of IGBT testing is increasingly demanded. To facilitate testing of the integrated Circuit, the integrated Circuit or module, such as an IGBT, may be disposed on a plug-in communication device, such as a Printed Circuit Board (PCB). The PCB is a planar structure, and is provided with a plug-in type electric connection interface, such as a pin or a straight connector. During testing, the plug-in electrical connection interface/connector on the PCB needs to be precisely assembled with the test head interface/connector of the test equipment to achieve electrical connection.

Specifically, the connector on the horizontally disposed PCB may be electrically connected to the connector on the vertically disposed board card of the testing device in an insertion manner. In one example, the PCB contains a total of 14 slots, with two connectors on each slot, for a total of 28 connectors. The circuit board of the test equipment is also provided with 28 connectors. In addition, the 28 connectors on the PCB may be divided into two groups spaced apart, one group of 16 connectors and the other group of 12 connectors, each group of connectors being connectable to a group of circuit boards of the test equipment. Assuming a clamping force between the receptacle and the pins of about 10 grams, there are 22 x 5=110 pins per connector, so there are 110 x 16=1760pins. From this, it is not difficult to calculate that the total force required for inserting and extracting the circuit board of the test device and the board of the device to be tested, i.e., the PCB, is 17.6kg.

Considering that the PCB is usually provided with a plurality of electrical connection interfaces, the number of pins used for plugging the PCB and the circuit board of the testing device is large, the force is large, and the operation is difficult only by manpower, so that a special locking device is required to be adopted for locking the PCB and each testing head interface of the testing device to achieve high precision. However, the locking device in the prior art is prone to force exerting unevenly in the manual operation process, so that the plugging angle has deviation, accurate plug alignment cannot be achieved, the connector is prone to being damaged, and the testing efficiency is affected.

In view of this, the present application provides a locking device and a test system. The test system comprises test equipment, at least one circuit board to be tested and a locking device. The locking device can lock and fix the circuit board to be tested such as a PCB and a first component such as a test device so as to connect the circuit board to be tested and the first component in a plugging mode, the stress is uniform in the plugging process of the PCB, the plugging angle is convenient to control, accurate plugging can be realized, the connector is prevented from being damaged, and the test efficiency is improved.

Fig. 1 is a schematic structural diagram of a locking device according to a first embodiment of the present application. As shown in fig. 1, the locking device comprises at least one set of locking mechanisms 1, each set of locking mechanisms 1 comprising a first locking member 11, a second locking member 12 and an actuating assembly 13. The first locking member 11 includes a support frame 111 for placing the circuit board B to be tested, and two sets of guide members respectively disposed on two first outer sidewalls W1 opposite to the support frame 111, where each set of guide members includes one or more than two guide members 112 disposed at intervals along a length direction of the first outer sidewalls W1. The circuit board to be tested can be a PCB, and components needing to be detected, such as IGBTs and the like, can be arranged on the circuit board to be tested.

The second locking member 12 includes two guide rail assemblies 121 respectively located outside the two first outer side walls W1, each guide rail assembly 121 includes a track G extending along the length direction of the first outer side wall W1, a slider H disposed on the track G, and a set of limiting channels disposed on the inner side wall of the slider H toward the support frame 111, the track G is used for being fixedly connected with a first component disposed below the support frame 111, such as a testing device, each set of limiting channels includes one or more than two limiting channels T disposed at intervals along the extending direction of the track G, and the limiting channels T can be correspondingly matched with the guide member 112.

When the driving assembly 13 drives the sliding block H to move on the track G in a first direction, such as the direction shown by the dashed arrow in fig. 1, so that the guide member 112 passes through the limiting channel T, the limiting channel T can apply a force to move the first locking member 11 toward the first part through the guide member 112, so that the connector of the circuit board to be tested on the first locking member 11 is connected with the connector on the first part in a plugging manner, and the locking mechanism 1 is in a locked state; when the driving assembly 13 drives the sliding block H to move on the track G in the direction opposite to the first direction to make the guide member 112 pass through the limiting channel T, the limiting channel T can apply a force to make the first locking member 11 move away from the first part through the guide member 112, so that the connector of the circuit board to be tested mounted on the first locking member 11 is disconnected from the connector on the first part, and the locking mechanism 1 is in an unlocked state.

In addition, it should be noted that, in fig. 1, only one set of the lock mechanism 1 is shown. In other embodiments of the present application, the locking device may comprise two or three or more sets of locking mechanisms 1.

The locking device of the embodiment of the application, two guide rail assemblies 121 of the second locking member 12 are located outside two first outer side walls W1 of the support frame 111 of the first locking member 11, two sets of guide members are respectively arranged on two opposite first outer side walls W of the support frame 111, each guide rail assembly 121 comprises a track G, a slider H and a set of limiting channels T arranged on the slider H, the driving assembly 13 drives the slider H to move on the track G and enables the guide member 112 to pass through the limiting channels T, the limiting channels T can apply force enabling the first locking member 11 to move towards or away from the first part through the guide member 112, and enable a connector of a circuit board B to be tested on the first locking member 11 to be connected or disconnected with a connector on the first part through a plugging mode, because the track G and the slider H can accurately guide, the problem that the moving direction is influenced by uneven force can not occur, thereby when the circuit board to be tested, such as a PCB, is locked and fixed with the first part, such as a testing device, so that the plugging angle can be accurately controlled, precise plugging and accurate plugging and unplugging can be realized, and the testing efficiency is improved.

Fig. 2 is a schematic view of a first locking member of the locking device of fig. 1. As shown in fig. 2, the guide member 112 extends along the length direction of the first outer sidewall W1 and includes a first flat section D1, a second flat section D2 and an inclined section D3, a first end of the inclined section D3 is close to the bottom surface of the supporting frame 111 relative to a second end of the inclined section D3, the first flat section D1 is connected to the first end of the inclined section D3, and the second flat section D2 is connected to the second end of the inclined section D3; the first direction is a direction from the first end of the inclined section D3 to the second end of the inclined section D3; wherein: the first flat section D1 is positioned in the limiting channel T, and the locking mechanism 1 is in an unlocking state; the second flat section D2 is positioned in the limiting channel T, and the locking mechanism 1 is in a locking state.

Since the first and second flat sections D1 and D2 of the guide member 112 have different heights, they are connected by the inclined section D3 to form a wedge-like structure. Thus, when the guide member 112 passes through the limiting passage T, the limiting passage T can apply a force to the inclined section D3, so that the guide member 112 moves towards or away from the first component, thereby realizing the connection or disconnection of the connector of the circuit board B to be tested on the first locking member 11 and the connector on the first component in a plugging manner. Moreover, the guide part 112 with the wedge-shaped structure has assistance and self-locking, that is, when the first flat section D1 is located in the limiting channel T, the limiting channel T does not apply force to the guide part 112, and the locking mechanism 1 can be stably in an unlocked state; when the second flat section D2 is located in the limit passage T, the limit passage T does not apply a force to the guide 112, and the locking mechanism 1 can be stably locked.

For convenience of manufacturing, the guide member 112 and the support frame 111 may be separately manufactured, and the guide member 112 may be detachably mounted on the support frame 111 by, for example, screws. Moreover, the dimension of the guide 112 in the height direction/thickness direction of the supporting frame 111 may be greater than the dimension of the channel space in the limiting channel T in the thickness direction, so as to ensure that the limiting channel T can apply a force to the guide 112 towards or away from the first component when the driving assembly 13 drives the slider H to move on the track G to make the guide 112 pass through the limiting channel T. In addition, an exemplary specific structure of the limiting channel T can be seen in the related content of fig. 6, which will be described below.

With continued reference to fig. 1, the drive assembly 13 may include two lead screw assemblies 131 and a drive member 132. The two lead screw assemblies 131 are respectively located at the outer sides of the two guide rail assemblies 121, each lead screw assembly 131 comprises a lead screw 1311 and a nut 1312 which is rotatably sleeved on the lead screw 1311, and the nut 1312 is connected with the sliding block H. The driving member 132 is used for driving the lead screws 1311 of the two lead screw assemblies 131 to rotate, so that the nuts 1312 drive the sliding blocks H to move along the rails G. The lead screw assembly 131 is adopted to drive the sliding block H to move, and the lead screw assembly 131 has a self-locking function, so that the stability and the fluency of the locking process or the unlocking process can be further improved.

In addition, in order to ensure that the nuts 1312 of the two screw assemblies 131 move synchronously, the screws 1311 of the two screw assemblies 131 can be driven to rotate simultaneously by a belt and pulley combination. Specifically, the two lead screw assemblies 131 include a first lead screw assembly 131a and a second lead screw assembly 131b, and the drive 132 may include a first pulley 1321, a second pulley 1322, a first belt 1323, and a handwheel 1324. The first pulley 1321 is connected to one end of the lead screw 1311 of the first lead screw assembly 131 a. The second pulley 1322 is connected to one end of the screw 1311 of the second screw assembly 131 b. The first belt 1323 is provided around the first pulley 1321 and the second pulley 1322. The handwheel 1324 is connected to one of the first pulley 1321 and the second pulley 1322 (e.g., the first pulley 1321) and is configured to drive one of the first pulley 1321 and the second pulley 1322 (e.g., the driving pulley such as the first pulley 1321) to rotate, so that the first belt 1323, i.e., the timing belt, drives the other of the first pulley 1321 and the second pulley 1322 (e.g., the driven pulley such as the second pulley 1322) to rotate, thereby simultaneously driving the screw 1311 of the first screw assembly 131a and the screw 1311 of the second screw assembly 131b to rotate.

Further, the first pulley 1321 and the second pulley 1322 may be located below the support bracket 111, the first belt 1323 may be located at a first end of each of the first pulley 1321 and the second pulley 1322 in the axial direction, and the driving member 132 may further include a second belt 1325 and a third belt 1326. The second belt 1325 is provided around one end of the screw 1311 of the first screw assembly 131a and a second end of the first pulley 1321 in the axial direction. The third belt 1326 is fitted around one end of the screw 1311 of the second screw assembly 131b and a second end of the second pulley 1322 in the axial direction. Therefore, the driving member 132 is not located above the supporting frame 111 or flush with the supporting frame 111, and interference with the driving member 132 when the supporting frame 111 is taken or placed can be avoided.

Also, a distance between the first and second pulleys 1321 and 1322 may be smaller than a distance between the lead screw 1311 of the first lead screw assembly 131a and the lead screw 1311 of the second lead screw assembly 131b, and a distance between the second and third belts 1325 and 1326 decreases in a direction toward the first belt 1323. This reduces the volume of the driving member 132 and avoids interference with other external mechanisms.

As shown in fig. 1 and 2, in order to conveniently place the circuit board B to be tested on the proper position of the supporting frame 111, the first locking member 11 may further include two sets of positioning pins. Two sets of locating pins are respectively arranged at two opposite second outer side walls W2 of the support frame 111, each set of locating pins 113 comprises one or more than two locating pins 113 arranged at intervals along the length direction of the second outer side walls W2, each locating pin 113 extends along the height direction of the support frame 111, and the locating pins 113 can be in locating fit with locating holes arranged on the circuit board B to be tested. In addition, for the convenience of taking and placing the supporting frame 111, two opposite second outer sidewalls W2 of the supporting frame 111 may be provided with handles S.

Fig. 3 is a schematic bottom view of the first locking member shown in fig. 2 after the circuit board to be tested is mounted thereon. As shown in fig. 3, the circuit board B to be tested has a total of 14 slots, and each slot has two connectors, for a total of 28 connectors. The 28 connectors on the circuit board B to be tested can be divided into two groups, one group of 16 connectors and the other group of 12 connectors, which are arranged at intervals, and each group of connectors can be connected with a group of circuit boards of a testing device (not shown in the figure).

In fig. 3, the first locking member 11 may also comprise two sets of linear bearings. Two sets of linear bearings set up respectively in the bottom of support frame 111, and can be located two relative second outside wall W2 departments of support frame 111, and every linear bearing of group includes the more than two linear bearings 114 that one or interval set up, and linear bearing 114 is used for the locating pin 113 location fit who sets up with on the first part, adopts linear bearing can reduce the frictional resistance when moving. It is understood that the linear bearing 114 may be provided at the bottom of the support bracket 111 near the first outer sidewall W1, if desired. As shown in fig. 3, each set of linear bearings at the second outer sidewall W2 includes two linear bearings 114, and a linear bearing 114 is also provided at the bottom of the support bracket 111 near the first outer sidewall W1, which is located at the middle of the length direction of the first outer sidewall W1, i.e., six linear bearings 114 are provided in total. In this case, 6 positioning pins can also be provided on the first component, for example, a test device.

When the locking device includes two sets of locking mechanisms 1, the two sets of locking mechanisms 1 are stacked, and the positioning pin 113 of the lower locking mechanism 1 can be positioned and engaged with the linear bearing 114 of the upper locking mechanism 1. As shown in fig. 2, the supporting frame 111 of the locking mechanism 1 is provided with four positioning pins 113, and four linear bearings 111 may be disposed at corresponding positions on the bottom of the supporting frame 111 of another locking mechanism 1 above the supporting frame 111 so as to be mutually positioned and matched with the four positioning pins 113 on the supporting frame of the locking mechanism 1 below.

In the locking device shown in fig. 1-3, the locking device includes a set of locking mechanisms 1, a first component corresponding to the locking mechanism 1 may be a testing device, a nut 1312 may be fixedly connected to a slider H, and a driving assembly 13 drives the slider H to slide along a rail G, so that a connector of a circuit board B to be tested placed on a supporting frame 111 of the locking mechanism 1 can be connected or disconnected with a connector of the testing device in a plugging manner.

Fig. 4 is a schematic structural diagram of a locking device according to a second embodiment of the present application. Fig. 5 is a schematic top view of the locking device shown in fig. 4. Fig. 6 is a structural view of a partial structure of the locking device shown in fig. 4. The locking device shown in fig. 4-6 is different from the locking device shown in fig. 1 in that the locking device shown in fig. 4-6 includes two sets of locking mechanisms 1, a circuit board to be tested can be placed on the support frame 111 of the first locking member 11 of each set of locking mechanisms 1, the first set of locking mechanisms 1a can enable the connector of the first circuit board B1 to be tested to be connected or disconnected with the connector of the test equipment in a plugging manner, and the second set of locking mechanisms 1B can enable the connector of the second circuit board B2 to be tested to be connected or disconnected with the connector of the first circuit board B1 to be tested in a plugging manner, so that the locking of the first circuit board B1 to be tested and the second circuit board B2 to be tested are respectively realized. In addition, in fig. 4, for the first set of locking mechanisms 1a, the first direction is the direction indicated by the dashed arrow; for the second set of locking mechanisms 1b, the first direction is the direction indicated by the dotted arrow.

Specifically, as shown in fig. 4 to fig. 6, the locking device includes a first group of locking mechanisms 1a, the circuit board B to be tested includes a first circuit board B1 to be tested, which is disposed on the supporting frame 111 of the first locking member 11 of the first group of locking mechanisms 1a, the first component corresponding to the first group of locking mechanisms 1a is a testing device, in the first group of locking mechanisms 1a, the nut 1312 may be fixedly connected with the slider H, and the driving component 13 drives the slider H to slide along the rail G, so that the connector of the first circuit board B1 to be tested, which is disposed on the supporting frame 111 of the first group of locking mechanisms 1a, can be connected with or disconnected from the connector of the testing device in a plugging manner.

And, the locking device also includes a second group of locking mechanisms 1B stacked on the first group of locking mechanisms 1a, the circuit board B to be tested includes a second circuit board B2 to be tested disposed on the support frame 111 of the first locking member 11 of the second group of locking mechanisms 1B, the first component corresponding to the second group of locking mechanisms 1B is the support frame 111 of the first group of locking mechanisms 1a, and at this time, the track G of the second group of locking mechanisms 1B is fixedly disposed on the support frame 111 of the first group of locking mechanisms 1a, as shown in fig. 8 which will be described below.

In the second set of locking mechanisms 1b, the nut 1312 is removably connected to the slider H, wherein: when the nut 1312 is connected to the slider H, the driving assembly 13 drives the slider H to slide along the rail G, so that the connector of the second circuit board B2 to be tested placed on the supporting frame 111 of the second group of locking mechanisms 1B can be connected or disconnected with the connector of the first circuit board B1 to be tested placed on the supporting frame 111 of the first group of locking mechanisms 1a in a plugging manner. When the driving assembly 13 of the first set of locking mechanisms 1a drives the slider H to move when the nut 1312 is not coupled with the slider H, the first locking member 11 and the rail assembly 121 of the second set of locking mechanisms 1b can be simultaneously moved together with the first locking member 11 of the first set of locking mechanisms 1a toward or away from the testing apparatus.

In one example, in order to detachably connect the nut 1312 and the slider H, as shown in fig. 4 and 5, the second set of locking mechanisms 1b further includes a connecting member 16, one end of the connecting member 16 is rotatably connected to the nut 1312, a limiting groove is provided on the slider H of the second set of locking mechanisms 1b, and the other end of the connecting member 16 can rotate between a first position and a second position relative to one end of the connecting member 16, wherein: when the first position is reached, the other end of the connecting piece 16 is positioned in the limiting groove, so that the other end of the connecting piece 16 can be in limiting connection with the sliding block H, and thus when the driving assembly 13 drives the sliding block H to slide along the track G, the supporting frame 111 of the second group of locking mechanisms 1B can descend, i.e. move towards the first circuit board B1 to be tested, or ascend, i.e. move away from the first circuit board B1 to be tested, so that the connector of the second circuit board B2 to be tested is connected or disconnected with the connector of the first circuit board B1 to be tested, which is placed on the supporting frame 111 of the first group of locking mechanisms 1a, in a plugging manner; in the second position, the other end of the connecting member 16 is located outside the position-limiting groove, so that the other end of the connecting member 16 is disconnected from the slider H, and thus the first locking member 11 and the rail assembly 121 of the second group of locking mechanisms 1b can be simultaneously moved toward or away from the testing equipment together with the first locking member 11 of the first group of locking mechanisms 1a when the driving assembly 13 of the first group of locking mechanisms 1a drives the slider H to move.

And, in order to restrict the moving range of the slider H, to further ensure that accurate docking can be achieved. As shown in fig. 4 to 6, each set of locking mechanism 1 further includes a first stop block 14 and a second stop block 15 arranged in sequence along the first direction, the first stop block 14 and the second stop block 15 are disposed on the track G or the first component and located at two ends of the track G, and the slider H can move between the first stop block 14 and the second stop block 15, wherein: when the sliding block H is contacted with the first stop block 14, the first flat section D1 is positioned in the limiting channel T, and the locking mechanism 1 is in an unlocking state; when the sliding block H contacts the second stop block 15, the second flat section D2 is located in the limit channel T, and the locking mechanism 1 is in a locked state.

Fig. 7 is a structural view showing another partial structure of the locking device shown in fig. 4. As shown in fig. 7, four guiding members 112 are disposed on the first outer side wall W1 of the supporting frame 111 of each set of locking mechanisms 1. In fig. 6, the sliding block H of the rail assembly 121 of the second locking mechanism 1b comprises four segments, each segment is provided with a limiting channel T formed by a set of rollers, and the four segments are fixed together through a connecting plate. The four guide members 112 can be respectively and correspondingly matched with the four limit channels T on the sliding block H.

The specific structure of the limiting channel T will be described below by taking the second set of locking mechanisms 1b as an example. As shown in fig. 6, the limiting channel T extends along the length direction of the first outer side wall W1, and includes a first portion T1 and a second portion T2 spaced apart from each other in the height direction of the first outer side wall W1, and the first portion T1 is far from the track G relative to the second portion T2. In the unlocked state, the first end of the guide 112 on the support bracket 111 located above in fig. 7 near the bottom surface of the support bracket 111, i.e., the first flat section D1, can be placed on the second portion T2; in the locked state, a second end of the guide 112 on the support bracket 111 located above in fig. 7, which is away from the bottom surface of the support bracket 111, i.e., the second flat section D2, can be placed on the second portion T2 in a supporting manner. When the slider H moves in the first direction, i.e. the direction from the first stop block 14 to the second stop block 15, the first portion T1 can push the inclined section D3 of the guide 112 toward the first part to drive the first locking member 11 to move toward the first part; when the slider H moves in the direction opposite to the first direction, i.e. the direction of the second stop block 15 to the direction of the first stop block 14, the second portion T2 can push the inclined section D3 of the guide 112 in the direction away from the first part to move the first locking member 11 away from the first part.

In fig. 6, the first portion T1 may include a first roller L1, the second portion T2 may include a second roller L2 and at least one third roller L3 sequentially arranged along the first direction, and the second roller L2 and the first roller L1 are disposed opposite to each other and spaced apart from each other along the height direction of the supporting frame 111. Therefore, rolling friction is formed between the guide piece 112 and the limiting channel T, resistance in moving is small, and stability and smoothness in the locking process are improved. Also, initially, the first flat section D1 of the guide 112 may be placed on the third roller L3.

Because the guide piece 112 is of a wedge-shaped structure, the guide piece has the functions of assisting power and self-locking. Fix guide 112 with the wedge structure on placing two relative first lateral walls W1 of PCB board's carriage 111, first gyro wheel L1, second gyro wheel L2 and third gyro wheel L3 are fixed on the gliding slider H of straight line track G, the spacing passageway T that adopts the gyro wheel to constitute cooperates with this wedge structure, driving piece 132 drives lead screw 1311's helical motion, can turn into the vertical motion of wedge structure with the horizontal motion of gyro wheel along track G, thereby realize making the PCB board rise with the disconnect-from connection and make the PCB board descend in order to connect through the grafting mode, the mesh of helping hand and auto-lock has been reached, further do benefit to and realize accurate plug.

And, in order to realize the horizontal motion of gyro wheel, select belt pulley drive mechanism for use to drive the slider H of lead screw motion to make fixed gyro wheel can carry out the horizontal motion along sharp track G, because track G and slider H can accurate direction, uneven problem that influences the direction of motion can not appear exerting oneself, thereby when fixing so that both connect through the grafting mode like test equipment locking to the circuit board that awaits measuring like PCB and first part, easily accurate control plug angle, can realize accurate plug, it is impaired to have avoided the connector, and the testing efficiency is improved.

Further, as shown in fig. 7, in the first group of locking mechanisms 1a, the first flat section D1 and the second flat section D2 of the guide member 112 of the first locking member 11 are arranged in the first direction indicated by the broken line arrows; in the second group of locking mechanisms 1b, the first flat section D1 and the second flat section D2 of the guide member 112 of the first locking member 11 are arranged in the first direction indicated by the dotted arrow; this ensures that the handwheel 1324 of the first set of locking mechanisms 1a and the handwheel 1324 of the second set of locking mechanisms 1b drive the slider H to move so that the locking mechanisms 1 are in the same rotational direction when in the locked state or the unlocked state. For example, the handwheel 1324 of the first group of locking mechanisms 1a rotates clockwise, the first group of locking mechanisms 1a is switched from the unlocking state to the locking state, and in the locking state, the connector of the first circuit board B1 to be tested is butted with the connector of the testing equipment; the hand wheel 1324 of the first group of locking mechanisms 1a rotates counterclockwise, the first group of locking mechanisms 1a is switched from the locking state to the unlocking state, and in the unlocking state, the connector of the first circuit board B1 to be tested is separated from the connector of the testing equipment. The hand wheel 1324 of the second group of locking mechanisms 1B rotates clockwise, the second group of locking mechanisms 1B is switched from the unlocking state to the locking state, and in the locking state, the connector of the second circuit board B2 to be tested is butted with the connector of the first circuit board B1 to be tested; the hand wheel 1324 of the second group of locking mechanisms 1B rotates counterclockwise, the second group of locking mechanisms 1B is switched from the locking state to the unlocking state, and in the unlocking state, the connector of the second circuit board B2 to be tested is separated from the connector of the first circuit board B1 to be tested.

Fig. 8 is a schematic structural view of still another partial structure of the locking device shown in fig. 4. As shown in fig. 8, the difference from the partial structure shown in fig. 7 is that in fig. 8, the rail G of the rail assembly 121 of the second set of locking mechanism 1b is shown to be disposed on the support bracket 111 of the first set of locking mechanism 1 a.

To sum up, in this application embodiment, because track and slider mutually support, can accurate direction, uneven and influence the problem of direction of motion can not appear exerting oneself to when fixing so that both are connected through the grafting mode like PCB and first part to the circuit board that awaits measuring locks like test equipment, easily accurate control plug angle can realize accurate plug, has avoided the connector impaired, has improved efficiency of software testing. The guide piece of the wedge-shaped structure can convert vertical movement of opposite insertion into horizontal movement, and the wedge-shaped structure has the assistance and self-locking functions, so that accurate plugging and unplugging of the connector are further guaranteed, and the purposes of quick detachment and locking are achieved. The limiting channel can be composed of rollers, so that rolling friction is formed between the guide piece and the limiting channel, the movement resistance is reduced, and the stability and the fluency of the locking process or the unlocking process can be improved. And the lead screw component is adopted to drive the sliding block to move, and the lead screw component has a self-locking function, so that the reliability of the locking process or the unlocking process can be further improved, and the transmission mode is labor-saving.

In addition, the locking device can realize the assembly and disassembly of the multilayer circuit boards to be tested which are stacked, and can respectively and independently control the connectors of the adjacent two layers of circuit boards to be tested to carry out accurate plugging, namely, the circuit boards are connected or disconnected in a plugging mode. Furthermore, the locking device can also be provided with a stop structure, namely a first stop block and a second stop block, so that the accurate butt joint of the horizontally placed circuit board to be tested and the vertically arranged connector on the circuit board of the test equipment or the connectors of the adjacent two layers of circuit boards to be tested can be better ensured.

Finally, the description is as follows: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.

Claims (13)

1. A locking device, characterized in that it comprises at least one set of locking mechanisms (1), each set of locking mechanisms (1) comprising:

the first locking piece (11) comprises a supporting frame (111) for placing a circuit board to be tested and two groups of guide pieces respectively arranged on two first outer side walls (W1) opposite to the supporting frame (111), wherein each group of guide pieces comprises one or more than two guide pieces (112) arranged at intervals along the length direction of the first outer side walls (W1);

the second locking piece (12) comprises two guide rail assemblies (121) respectively positioned on the outer sides of the two first outer side walls (W1), each guide rail assembly (121) comprises a track (G) extending along the length direction of the first outer side wall (W1), a sliding block (H) arranged on the track (G) and a group of limiting channels arranged on the inner side wall, facing the support frame (111), of the sliding block (H), the track (G) is used for being fixedly connected with a first part arranged below the support frame (111), each group of limiting channels comprises one limiting channel or more than two limiting channels (T) arranged at intervals along the extending direction of the track (G), and the limiting channels (T) can be correspondingly matched with the guide pieces (112);

when the driving assembly (13) drives the sliding block (H) to move on the track (G) along a first direction to enable the guide piece (112) to pass through the limit passage (T), the limit passage (T) can enable the guide piece (112) to apply force for enabling the first locking piece (11) to move towards the first part, so that the connector of the circuit board (B) to be tested on the first locking piece (11) is connected with the connector on the first part in a plugging mode, and the locking mechanism (1) is in a locking state; when the driving assembly (13) drives the sliding block (H) to move on the track (G) along the direction opposite to the first direction so that the guide piece (112) passes through the limiting channel (T), the limiting channel (T) can enable the first locking piece (11) to be disconnected from the connector of the circuit board (B) to be tested installed on the first locking piece (11) and the connector on the first part by applying force for enabling the first locking piece (11) to move away from the first part through the guide piece (112), and the locking mechanism (1) is in an unlocking state.

2. The locking device according to claim 1, wherein the guiding member (112) extends along a length direction of the first outer side wall (W1) and comprises a first flat section (D1), a second flat section (D2) and an inclined section (D3), a first end of the inclined section (D3) is close to a bottom surface of the supporting frame (111) relative to a second end of the inclined section (D3), the first flat section (D1) is connected with the first end of the inclined section (D3), and the second flat section (D2) is connected with the second end of the inclined section (D3); the first direction is a direction from a first end of the slanted section (D3) to a second end of the slanted section (D3); wherein: the first flat section (D1) is positioned in the limiting channel (T), and the locking mechanism (1) is in an unlocking state; the second flat section (D2) is located in the limiting channel (T), and the locking mechanism (1) is in a locking state.

3. Locking device according to claim 1, wherein the retaining channel (T) extends along the length of the first outer side wall (W1) and comprises a first portion (T1) and a second portion (T2) spaced apart along the height of the first outer side wall (W1), the first portion (T1) being distanced from the track (G) with respect to the second portion (T2), wherein: in the unlocked state, a first end of the guide (112) close to the bottom surface of the support frame (111) can rest supported on the second portion (T2); in the locked state, a second end of the guide (112) remote from the bottom surface of the support (111) can rest supported on the second portion (T2);

-said first portion (T1) being able to push said guide (112) towards said first part to bring said first locking member (11) towards said first part when said slider (H) is moved in said first direction; when the slider (H) moves in a direction opposite to the first direction, the second portion (T2) can push the guide (112) in a direction away from the first part to move the first locking member (11) away from the first part.

4. Locking device according to claim 3, characterized in that said first portion (T1) comprises a first roller (L1), said second portion (T2) comprises a second roller (L2) and at least a third roller (L3) arranged in sequence along said first direction, said second roller (L2) being opposite and spaced from said first roller (L1) along the height direction of said support frame (111).

5. Locking device according to any one of claims 1 to 4, characterized in that said actuation assembly (13) comprises:

the two lead screw assemblies (131) are respectively positioned on the outer sides of the two guide rail assemblies (121), each lead screw assembly (131) comprises a lead screw (1311) and a nut (1312) which is rotatably sleeved on the lead screw (1311), and the nut (1312) is connected with the sliding block (H);

and the driving piece (132) is used for driving the lead screws (1311) of the two lead screw assemblies (131) to rotate so that the nut (1312) drives the sliding block (H) to move along the track (G).

6. Locking device according to claim 5, characterized in that said two lead screw assemblies (131) comprise a first lead screw assembly (131 a) and a second lead screw assembly (131 b), said drive member (132) comprising:

a first pulley (1321) connected to one end of a screw (1311) of the first screw assembly (131 a);

a second pulley (1322) connected to one end of a screw (1311) of the second screw assembly (131 b);

a first belt (1323) provided around the first pulley (1321) and the second pulley (1322);

a hand wheel (1324) connected to one of the first pulley (1321) and the second pulley (1322) and configured to drive one of the first pulley (1321) and the second pulley (1322) to rotate, so that the first belt (1323) drives the other of the first pulley (1321) and the second pulley (1322) to rotate, thereby simultaneously driving the screw (1311) of the first screw assembly (131 a) and the screw (1311) of the second screw assembly (131 b) to rotate.

7. The locking device according to claim 6, wherein the first pulley (1321) and the second pulley (1322) are located below the support frame (111), the first belt (1323) is located at a first end of each of the first pulley (1321) and the second pulley (1322) in the axial direction, and the driving member (132) further comprises:

a second belt (1325) sleeved outside one end of the screw (1311) of the first screw assembly (131 a) and a second end of the first pulley (1321) in the axis direction;

and a third belt (1326) sleeved outside one end of the screw (1311) of the second screw assembly (131 b) and a second end of the second pulley (1322) along the axis direction.

8. Locking device according to claim 1, characterized in that the first locking member (11) further comprises:

two groups of positioning pins are respectively arranged at two opposite second outer side walls (W2) of the support frame (111), each group of positioning pins (113) comprises one or more than two positioning pins (113) which are arranged at intervals along the length direction of the second outer side walls (W2), each positioning pin (113) extends along the height direction of the support frame (111), and the positioning pins (113) are used for positioning and matching with positioning holes arranged on the circuit board to be tested; and/or the presence of a gas in the atmosphere,

two sets of linear bearing, set up respectively in the bottom of support frame (111), and be located two relative second outside wall (W2) departments of support frame (111), every linear bearing of group includes linear bearing (114) more than two that one or interval set up, linear bearing (114) be used for with locating pin (113) location fit that sets up on the first part.

9. Locking device according to claim 1, characterized in that each set of said locking mechanisms (1) further comprises a first stop block (14) and a second stop block (15) arranged in sequence along said first direction, said first stop block (14) and said second stop block (15) being arranged on said rail (G) or on said first component and at both ends of said rail (G), said slider (H) being movable between said first stop block (14) and said second stop block (15), wherein:

when the sliding block (H) is in contact with the first stop block (14), the locking mechanism (1) is in the unlocking state;

when the sliding block (H) is in contact with the second stop block (15), the locking mechanism (1) is in the locking state.

10. The locking device according to claim 5, characterized in that the locking device comprises a first set of locking mechanisms (1 a), the circuit board (B) to be tested comprises a first circuit board (B1) to be tested arranged on the supporting frame (111) of the first locking member (11) of the first set of locking mechanisms (1 a), the first component corresponding to the first set of locking mechanisms (1 a) is a testing device, in the first set of locking mechanisms (1 a), the nut (1312) is fixedly connected with the slider (H), and the driving component (13) drives the slider (H) to slide along the rail (G), so that the connector of the first circuit board (B1) to be tested can be connected or disconnected with the connector of the testing device in a plugging manner.

11. The locking device according to claim 10, characterized in that the locking device comprises a second set of locking mechanisms (1B) stacked on the first set of locking mechanisms (1 a), the circuit board (B) to be tested comprises a second circuit board (B2) to be tested arranged on the supporting frame (111) of the first locking member (11) of the second set of locking mechanisms (1B), the corresponding first component of the second set of locking mechanisms (1B) is the supporting frame (111) of the first set of locking mechanisms (1 a), in the second set of locking mechanisms (1B), the nut (1312) is detachably connected with the slider (H), wherein:

when the nut (1312) is connected with the sliding block (H), the driving component (13) drives the sliding block (H) to slide along the track (G), so that the connector of the second circuit board to be tested (B2) can be connected with or disconnected from the connector of the first circuit board to be tested (B1) in a plugging mode;

when the nut (1312) is not connected with the sliding block (H), and the driving assembly (13) of the first group of locking mechanisms (1 a) drives the sliding block (H) to move, the first locking piece (11) of the second group of locking mechanisms (1 b) and the guide rail assembly (121) can be simultaneously moved towards the test equipment or away from the test equipment together with the first locking piece (11) of the first group of locking mechanisms (1 a).

12. Locking device according to claim 11, characterized in that the second set of locking mechanism (1 b) further comprises a connecting member (16), one end of the connecting member (16) is rotatably connected with the nut (1312), a slide (H) of the second set of locking mechanism (1 b) is provided with a limiting groove, the other end of the connecting member (16) can rotate between a first position and a second position relative to one end of the connecting member (16), wherein:

when the sliding block is in the first position, the other end of the connecting piece (16) is positioned in the limiting groove, so that the other end of the connecting piece (16) can be in limiting connection with the sliding block (H);

and when the sliding block is at the second position, the other end of the connecting piece (16) is positioned outside the limiting groove, so that the other end of the connecting piece (16) is disconnected with the sliding block (H).

13. A test system, comprising:

a testing device and a locking device according to any one of claims 1-12, the testing device being a first part of the locking device corresponding to a first set of locking means (1 a), the track (G) of the locking device of the first set of locking means (1 a) being fixedly connected to the testing device;

at least one circuit board to be tested, each circuit board to be tested being mounted on a first locking member (11) of each set of locking mechanisms (1) of the locking device;

wherein: the first group of locking mechanisms (1 a) are used for enabling a connector of a first circuit board (B1) to be tested in the at least one circuit board to be tested to be connected with and disconnected from a connector of the testing equipment in a plugging mode; the second group of locking mechanisms (1B) of the locking device is used for enabling the connector of a second circuit board (B2) to be tested in the at least one circuit board to be tested to be connected with and disconnected from the connector of the first circuit board (B1) to be tested in a plugging mode.

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