Circuit board loading access device of circuit board burning test equipment

Abstract

The utility model relates to the technical field of circuit board testing, in particular to a circuit board loading and accessing device of circuit board burning and testing equipment, a loading and accessing jig is provided with an upper positioning plate and a lower positioning plate, and a probe assembly is arranged on the upper positioning plate; the circuit board loading access device comprises a lower positioning carrier plate and an upper positioning carrier plate, the upper positioning carrier plate is arranged above the lower positioning carrier plate, the lower positioning plate is installed on the lower positioning carrier plate, the upper positioning plate is installed on the upper positioning carrier plate, a first rotating shaft is arranged between the upper positioning carrier plate and the lower positioning carrier plate, and a second rotating shaft is arranged between the upper positioning carrier plate and the lower positioning carrier plate. And a carrier plate locking mechanism is arranged between the upper positioning carrier plate and the lower positioning carrier plate. The upper positioning plate and the lower positioning plate are accurately aligned and matched through the carrier plate locking mechanism, all the probes on the probe assembly are ensured to be synchronously butted with a detected circuit board through the arrangement of the linear driving mechanism, and poor contact of part of the probes is effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit board test technical field, concretely relates to a kind of circuit board loading access device of circuit board burning test equipment. BACKGROUND

[0002] Circuit board burning test is an important process, to ensure that microcontroller or integrated circuit (IC) on the circuit board has been programmed correctly, and its function is normal. The following are the basic steps of circuit board burning test.

[0003] 1. Select the appropriate programmer / burner: select the appropriate programmer / burner according to the type of microcontroller or integrated circuit.

[0004] 2. Connect hardware: connect the programmer / burner with the circuit board correctly. This usually involves connecting the programmer's interface (such as USB, SPI, JTAG, etc.) with the corresponding interface on the circuit board.

[0005] 3. Load program: load the program to be burned into the microcontroller or integrated circuit into the programmer. This can be done by copying the program directly into the programmer's memory, or by online transmission.

[0006] 4. Start burning: start the programmer / burner to start burning the program into the microcontroller or integrated circuit on the circuit board.

[0007] 5. Test program: after burning is completed, test whether the function of the microcontroller or integrated circuit is normal by various methods. This may include observing the output of the circuit board, checking the signal using a logic analyzer or oscilloscope, and manually inputting test commands, etc.

[0008] 6. Debugging: if any problems are found during testing, debugging is needed to find the root cause of the problem and fix errors in the program.

[0009] 7. Repeat testing and debugging: after fixing the problem, repeat the testing and debugging process to ensure that the problem has been solved and the function of the microcontroller or integrated circuit is normal.

[0010] 8. Record and report: after completing the burning and testing, record all the results and generate a report to facilitate other personnel to understand the testing process and results.

[0011] Among them, in the process of connecting hardware, it is necessary to ensure that the programmer / burner is connected with the circuit board correctly, that is, to ensure the stability of the connection between the probe assembly and the circuit board.

[0012] The probe assembly is used to communicate with the microcontroller or integrated circuit on the circuit board during the burning process. The following are the main functions of the probe assembly in the circuit board burning equipment:

[0013] 1. Communication interface: The probe assembly serves as the communication interface between the programmer / burner and the circuit board, enabling high-speed and stable signal transmission. It establishes a reliable physical connection by closely contacting the target chip on the circuit board, ensuring accurate data transmission during the burning process.

[0014] 2. Signal transmission: During the burning process, the probe assembly transmits data from the programmer to the microcontroller or integrated circuit on the circuit board. At the same time, it is responsible for reading data from the target chip and returning it to the programmer for verification or further processing.

[0015] 3. Precise alignment: The probes in the probe assembly need to be precisely aligned with the pins of the target chip during the burning process to ensure accurate data transmission. The probe assembly usually has a high-precision positioning system that can quickly and accurately find the location of the target chip and make close contact with it.

[0016] 4. Adapt to different packaging: Different microcontrollers or integrated circuits may have different packaging forms (such as QFN, BGA, etc.), and the probe assembly needs to be able to adapt to these different packaging to ensure reliable contact with the target chip.

[0017] 5. Withstand repeated use: During multiple burning processes, the probe needs to withstand repeated insertion and friction, maintaining the stability of its structure and signal transmission performance.

[0018] In summary, the probe assembly in the circuit board burning equipment plays a crucial role in ensuring the accuracy and reliability of the burning process, and it is necessary to ensure that the probe assembly is in good connection with the circuit board before performing the burning test.

[0019] Therefore, the utility model patent aims to provide a circuit board loading access device that can accurately position the detected circuit board and ensure stable docking of the probe assembly with the circuit board. Utility model content

[0020] To solve the prior art problems, the utility model provides a kind of circuit board loading access device of circuit board burning test equipment, including loading access fixture, loading access fixture has upper locating plate and lower locating plate, probe assembly is installed on upper locating plate;Lower locating plate is provided with at least a group of photoelectric sensors, when upper locating plate and lower locating plate cooperate to position, upper locating plate disconnects the signal connection between this group of photoelectric;Circuit board loading access device includes lower locating plate and upper locating plate, upper locating plate is arranged above lower locating plate, lower locating plate is installed on lower locating plate, upper locating plate is installed on upper locating plate, and first rotating shaft is arranged between upper locating plate and lower locating plate, load plate locking mechanism is arranged between upper locating plate and lower locating plate;Circuit board loading access device further includes electrical cabinet, loading access fixture is installed on the top of electrical cabinet, control assembly and power supply assembly are provided in electrical cabinet, controller is provided on the top of electrical cabinet, power supply assembly is connected with control assembly and is powered for it, controller and loading access fixture are electrically connected with control assembly.

[0021] As a further improvement of the utility model, a linear drive mechanism is installed on the upper locating plate, which drives the upper locating plate to move along a straight line perpendicular to the upper locating plate and towards the lower locating plate.

[0022] As a further improvement of the utility model, the linear drive mechanism includes a linear drive installed on the upper locating plate, the driving direction of the linear drive is perpendicular to the upper locating plate, and the output end of the linear drive is installed with a mounting plate placed between the upper locating plate and the lower locating plate. The mounting plate is parallel to the upper locating plate, and the upper locating plate is installed on the mounting plate.

[0023] As a further improvement of the utility model, an identification device is also installed on the mounting plate. Windows are provided on the mounting plate and the upper locating plate. When the upper locating plate and the lower locating plate are properly positioned, the identification device identifies the specified area on the circuit board under test to determine whether the loaded circuit board is correct.

[0024] As a further improvement of the utility model, the load plate locking mechanism includes a support fixedly installed on the lower locating plate. The support has a support end extending towards the upper locating plate.

[0025] As a further improvement of the utility model, the load plate locking mechanism further includes a locking piece. The locking piece is rotatably connected with the upper locating plate. The end of the locking piece is provided with a hook. The support is provided with a hook groove matched with the hook.

[0026] As a further improvement of the utility model, two supports are provided on the lower locating plate, and two locking pieces are provided on the upper locating plate. The two locking pieces are connected with a rear pull rod.

[0027] As further improvement of the present application, the carrier plate locking mechanism further comprises a safety lock device, the safety lock device comprises lock rods installed on both sides of the mounting plate or both sides of the lower positioning plate, a lock shaft is installed on the locking member, the front end of the lock rod is provided with a lock hole with the downward hooking direction, when the upper positioning plate and the lower positioning plate are cooperated in place, the lock hole hooks the lock shaft from top to bottom.

[0028] The present application has the beneficial effects compared with the prior art: the accurate cooperation of the upper positioning plate and the lower positioning plate is realized through the carrier plate locking mechanism, and the cooperation of all the probes on the probe assembly with the circuit board to be detected is realized through the setting of the linear driving mechanism, so that the poor contact of part of the probes is effectively avoided.

[0029] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a circuit board burning test equipment.

[0031] Figure 2 It is a three-dimensional structural schematic diagram of a circuit board loading access device in a circuit board burning test equipment.

[0032] Figure 3 It is a three-dimensional structural schematic diagram of a circuit board loading access device in a circuit board burning test equipment.

[0033] Figure 4 It is a three-dimensional structural schematic diagram of a circuit board loading access device in a circuit board burning test equipment.

[0034] Figure 5 It is a three-dimensional structural schematic diagram of a circuit board loading access device in a circuit board burning test equipment.

[0035] Figure 6 It is a three-dimensional structural schematic diagram of a circuit board loading access device in a circuit board burning test equipment. Figure 1 .

[0036] Figure 7 It is a three-dimensional structural schematic diagram of a circuit board loading access device in a circuit board burning test equipment. Figure 2 .

[0037] The figure marks are: 1, burning test cabinet; 2, circuit board loading access device; 3, electrical cabinet; 3a, controller; 4, lower positioning plate; 4a, photoelectric sensor; 5, upper positioning plate; 6, upper positioning carrier plate; 6a, locking piece; 6a1, hook; 6a2, lock shaft; 6b, shaft seat; 7, lower positioning carrier plate; 7a, support; 7a1, support end; 7a2, hook groove; 7c, bracket; 8, linear driver; 9, mounting plate; 10, identification device; 11, lock rod; 12, first gas spring; 13, pull rod; 14, heat dissipation assembly; 15, circuit board. DETAILED DESCRIPTION

[0038] Reference Figures 1 to 3 As shown in the figure, a circuit board burning test equipment includes a burning test cabinet 1 and a circuit board loading access device 2, wherein the circuit board loading access device 2 is used to fix the detected circuit board 15 and realize the communication connection between the circuit board 15 and the burning test cabinet 1. Specifically, the circuit board loading access device 2 has a probe assembly in communication connection with the detected circuit board 15, and the probe assembly is in communication connection with the burning test cabinet 1 through a cable. The burning test cabinet 1 is used for program burning, program testing, program debugging, test process recording and test report generation of the detected circuit board 15.

[0039] The circuit board loading access device 2 includes a loading access jig, which has a lower positioning plate 4 for bearing the tested circuit board 15 and an upper positioning plate 5 for pressing the tested circuit board 15 from top to bottom. When the upper positioning plate 5 and the lower positioning plate 4 cooperate to accurately position the tested circuit board 15, the probes on the probe assembly are connected with the communication interface and chip pins on the tested circuit board 15.

[0040] In order to ensure that the burning test is carried out after the tested circuit board 15 is accurately positioned (the accurate positioning can ensure that the probes are in good contact), the lower positioning plate 4 is provided with at least one group of photoelectric sensors 4a. When the upper positioning plate 5 and the lower positioning plate 4 cooperate to the right position, the upper positioning plate 5 disconnects the signal connection between the group of photoelectric sensors 4a. The group of photoelectric sensors 4a includes a transmitting end and a receiving end. More specifically, when the upper positioning plate 5 is not moved to the accurate position cooperating with the lower positioning plate 4, the light beam emitted by the transmitting end is received by the receiving end, the group of photoelectric sensors 4a is in a signal conduction state, and the tested circuit board 15 is in a state of not being allowed to be powered on. When the upper positioning plate 5 moves to the accurate position cooperating with the lower positioning plate 4, the upper positioning plate 5 blocks the signal between the transmitting end and the receiving end, the group of photoelectric sensors 4a is in a signal disconnection state, and the tested circuit board 15 is in a running power-on state.

[0041] In order to facilitate the cooperation of the upper positioning plate 5 and the lower positioning plate 4, the prior art mostly adopts the scheme that the lower positioning plate 4 is fixedly arranged and the upper positioning plate 5 is rotatably arranged, such as the universal circuit board 15 program burning and testing device disclosed in Chinese Patent Publication No. CN213938454U and the virus detector circuit board 15 burning and testing machine disclosed in Chinese Patent Publication No. CN215866974U, both of which adopt the scheme that the lower positioning plate 4 is installed on the lower loading plate, the upper positioning plate 5 is installed on the upper loading plate, a rotating shaft is arranged between the upper loading plate and the lower loading plate, the cooperation of the upper positioning plate 5 and the lower positioning plate 4 is realized by rotating the upper loading plate relative to the lower loading plate around the rotating shaft, the positioning of the tested circuit board 15 is realized, and a locking mechanism is arranged between the upper loading plate and the lower loading plate to realize the locking between the upper positioning plate 5 and the lower positioning plate 4. The scheme of rotatably arranging the upper positioning plate 5 in the prior art has the disadvantage that all the probes in the probe assembly are not in contact with the tested circuit board 15 at the same time, which is easy to cause poor contact of individual probes.

[0042] As shown in Figure 3 The circuit board loading access device 2 comprises a lower positioning plate 7 and an upper positioning plate 6. The upper positioning plate 6 is arranged above the lower positioning plate 7. The lower positioning plate 4 is installed on the lower positioning plate 7. The upper positioning plate 5 is installed on the upper positioning plate 6. A first rotating shaft is arranged between the upper positioning plate 6 and the lower positioning plate 7. A plate locking mechanism is arranged between the upper positioning plate 6 and the lower positioning plate 7. The plate locking mechanism is used to ensure that the upper positioning plate 6 rotates to the limit position of the first rotating shaft relative to the lower positioning plate 7. The limit position is that the upper positioning plate 6 is parallel to the lower positioning plate 7.

[0043] As shown in Figure 4 The upper positioning plate 6 is provided with a linear driving mechanism for driving the upper positioning plate 5 to move along a straight line perpendicular to the upper positioning plate 6 and towards the lower positioning plate 4. When the upper positioning plate 6 moves to be parallel to the lower positioning plate 7 and is locked by the plate locking mechanism, the linear driving mechanism drives the upper positioning plate 5 to cooperate with the lower positioning plate 4. In the cooperation process, the upper positioning plate 5 moves linearly relative to the lower positioning plate 4, ensuring that all the probes in the probe assembly are in synchronous contact with the circuit board 15, and avoiding the occurrence of poor contact of individual probes.

[0044] As shown in Figure 5 The linear driving mechanism comprises a linear driver 8 installed on the upper loading plate. The driving direction of the linear driver 8 is perpendicular to the upper positioning plate 6. The output end of the linear driver 8 is provided with a mounting plate 9 arranged between the upper positioning plate 6 and the lower positioning plate 7. The mounting plate 9 is arranged parallel to the upper positioning plate 6. The upper positioning plate 5 is installed on the mounting plate 9. More specifically, the linear driver 8 can be a pneumatic cylinder, an electric cylinder or other driving elements capable of driving.

[0045] In addition, a rotatable protective cover is installed above the upper positioning plate 6.

[0046] Further, in order to avoid that the operator loads the wrong circuit board 15 on the lower positioning plate 4 during the programming test operation of the circuit board 15, referring to Figure 4 and Figure 5 , an identification device 10 is installed on the mounting plate 9, and the mounting plate 9 and the upper positioning plate 5 are both provided with a window, when the upper positioning plate 5 and the lower positioning plate 4 are matched in place, the identification device 10 identifies the designated area on the circuit board 15 under test, to determine whether the loaded circuit board 15 is correct, that is, whether the loaded circuit board 15 is compatible with the probe assembly, to avoid that the probes on the probe assembly are damaged or the circuit board 15 is damaged due to the loading of the wrong circuit board 15. When the identification device 10 identifies that the result is "compatible", the linear drive mechanism is driven to move the mounting plate 9. The identification device 10 is a code scanning gun, which is used to identify the bar code or two-dimensional code on the circuit board 15. It should be noted that, under normal circumstances, the lower positioning plate 4 has positioning columns matched with the positioning holes on the circuit board 15 under test, and the purpose of the cooperation between the positioning holes and the positioning columns is to prevent the misplacement of the circuit board 15. However, in actual situations, there are some series of circuit boards 15 that have different circuit structures but the same appearance shape and the same positioning hole position, in which case, the identification device 10 is needed for identification.

[0047] In combination with Figures 4 to 7 , the carrier plate locking mechanism includes a support member 7a fixedly installed on the lower positioning plate 7, the support member 7a has a support end 7a1 extending upward to the upper positioning plate 6, when the lower positioning plate 7 is rotated to be parallel to the lower positioning plate 7, the lower surface of the upper positioning plate 6 is in contact with the support end 7a1, to achieve the accurate positioning of the absolute position of the upper positioning plate 6 relative to the lower positioning plate 7 after the upper positioning plate 6 is rotated into place.

[0048] In combination with Figures 4 to 7 , the carrier plate locking mechanism further includes a locking member 6a, the locking member 6a is rotatably connected with the upper positioning plate 6, the locking member 6a has a hook 6a1 at the end thereof, the support member 7a is provided with a hook groove 7a2 matched with the hook 6a1, when the lower positioning plate 7 is rotated to be parallel to the lower positioning plate 7, the hook 6a1 at the end of the locking member 6a is matched with the hook groove 7a2 on the support member 7a, to achieve the locking of the position between the upper positioning plate 6 and the lower positioning plate 7.

[0049] More specifically, referring to Figure 4As shown, two support members 7a are arranged on the lower positioning carrier plate 7, and two locking members 6a are arranged on the upper positioning carrier plate 6, and a rear pull rod 13 is connected between the two locking members 6a, and a torsion spring is arranged at the rotating connection between the locking member 6a and the upper positioning carrier plate 6, and the two locking members 6a are rotated relative to the upper positioning carrier plate 6 by pulling the pull rod 13, so as to separate the hook 6a1 from the hook groove 7a2, and to realize the unlocking between the upper positioning carrier plate 6 and the lower positioning carrier plate 7, and when the pull rod 13 is released, the locking member 6a can be restored to the state perpendicular to the upper positioning carrier plate 6 under the action of the torsion spring.

[0050] Further referring to Figure 4 and Figure 7 As shown, the upper positioning carrier plate 6 and the lower positioning carrier plate 7 are both rectangular plates, and for the convenience of description, two mutually parallel edges of the lower positioning carrier plate 7 are defined as a first edge and a second edge, and similarly, two mutually parallel edges of the upper positioning carrier plate 6 are defined as a third edge and a fourth edge, and two supports 7c are arranged at the edge of the lower positioning carrier plate 7 close to the first edge, and an axle seat 6b is arranged at the edge of the upper positioning carrier plate 6 close to the third edge, and the axle seat 6b is rotatably connected with the support 7c, and the rotating shaft of the axle seat 6b constitutes the first rotating shaft.

[0051] The two support members 7a are arranged on the lower positioning carrier plate 7 close to the second edge, and the two locking members 6a are arranged on the upper positioning carrier plate 6 close to the fourth edge.

[0052] In the prior art described above, the cooperation of the upper carrier plate and the lower carrier plate is synchronous with the cooperation of the probe assembly and the circuit board 15, that is, when the upper carrier plate and the lower carrier plate are cooperated in place, the probe assembly is also cooperated with the circuit board 15 in place. Such synchronous cooperation makes the connection between the circuit board 15 in the burning test state and the probe assembly disconnected when the misoperation is performed, which can cause the circuit board 15 to be burned, and even the burner to be damaged.

[0053] In order to prevent the above situation from occurring, referring to Figures 5 to 7 As shown, the carrier plate locking mechanism further comprises a safety lock device, the safety lock device comprises a lock rod 11 arranged on both sides of the mounting plate 9 or both sides of the lower positioning plate 4, and a lock shaft 6a2 is arranged on the locking member 6a, and the front end of the lock rod 11 is provided with a lock hole facing downward, and when the upper positioning plate 5 and the lower positioning plate 4 are cooperated in place, the lock hole hooks the lock shaft 6a2 from top to bottom.

[0054] Only when the linear driver 8 drives the upper positioning plate 5 and the lower positioning plate 4 to separate so that the lock hole and the lock shaft 6a2 are in a separated state, pulling the pull rod 13 drives the locking member 6a to rotate and further releases the separation of the locking member 6a and the support member 7a. Finally, the front and rear actions of the separation of the probe assembly and the separation of the upper positioning plate 5 are realized.

[0055] To facilitate the rotation and opening of the upper positioning plate 6, a first gas spring 12 is installed between the upper positioning plate 6 and the lower positioning plate 7. One end of the first gas spring 12 is connected to the lower positioning plate 7, and the other end of the first gas spring 12 is connected to the upper positioning plate 6. Two first gas springs 12 can be provided.

[0056] Overheating of circuit board 15 during programming tests is a common problem and can be caused by a variety of factors.

[0057] Excessive power consumption: As the tasks performed by circuit board 15 become more complex, the required current and voltage increase, causing circuit board 15 to generate more heat. Without appropriate heat dissipation measures, circuit board 15 can easily fail due to overheating.

[0058] Inadequate heat dissipation design: The heat dissipation design of circuit board 15 may be inadequate, failing to effectively dissipate heat from circuit board 15. This may be due to an unreasonable size or design of the heat sink, or insufficient thermal conductivity of the heat dissipation material.

[0059] High ambient temperature: If the ambient temperature of the circuit board 15 is too high, the circuit board 15 will also heat up. In this case, additional heat dissipation measures are required, such as using a fan or heat sink, to reduce the operating temperature of the circuit board 15.

[0060] Based on the aforementioned heat generation issue during the programming test of circuit board 15, this utility model proposes a technical improvement by focusing on reducing the ambient temperature. Specifically, refer to... Figure 2 As shown, the upper positioning carrier plate 6 has two side panels, which are perpendicular to the locking first rotation axis. When the upper positioning carrier plate 6 rotates relative to the lower positioning carrier plate 7 to a parallel state, the area defined by the upper positioning carrier plate 6, the lower positioning carrier plate 7, and the two side panels constitutes a working area. This working area has a first open side facing the pull rod 13 and a second open side facing the first rotation axis. Heat dissipation components 14 are installed at the lower end of the upper positioning assembly corresponding to the first and second open sides, respectively. This working area is the environment for the circuit board 15 programming test. The heat dissipation components 14 on the first and second open sides effectively improve the heat dissipation effect within the working area, ensuring the smooth progress of the programming test.

[0061] Reference Figure 1 and Figure 2 As shown, the circuit board loading and access device 2 also includes an electrical cabinet 3. The loading and access fixture is installed on the top of the electrical cabinet 3. The electrical cabinet 3 is equipped with a control component and a power supply component. The top of the electrical cabinet 3 is equipped with a controller 3a. The power supply component is connected to the control component and supplies power to it. The controller 3a and the loading and access fixture are electrically connected to the control component.

[0062] The electrical cabinet 3 provides independent power supply and control for the loading access tool. The controller 3a is provided with a start button, an emergency stop button and an indicator light. When the upper positioning plate 6 and the lower positioning plate 7 are matched in place, the start button is operated to control the linear driver 8 to drive the upper positioning plate 5 to move downward to the position, the signal of the photoelectric sensor 4a is blocked, the indicator light is green, indicating that the probe assembly is connected to the circuit board 15, at this time, the burning test cabinet 1 can be operated to perform burning test. If a fault occurs during the burning test, the indicator light is red, and the emergency stop button is operated to control the linear driver 8 to drive the upper positioning plate 5 to move upward, so that the probe assembly is disconnected from the circuit board 15. The probe assembly is first connected to the control assembly through a cable, and the control assembly is connected to the burning test cabinet 1 through the cable.

[0063] The above embodiments only express one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A circuit board loading access device of a circuit board burning test equipment, comprising a loading access jig, the loading access jig having an upper positioning plate (5) and a lower positioning plate (4), a probe assembly being installed on the upper positioning plate (5); characterized in that, The lower positioning plate (4) is provided with at least one group of photoelectric sensors (4a), and when the upper positioning plate (5) is matched with the lower positioning plate (4) to the position, the upper positioning plate (5) disconnects the signal connection between the group of photoelectric sensors (4a); The circuit board loading access device (2) comprises a lower positioning plate (7) and an upper positioning plate (6), the upper positioning plate is arranged above the lower positioning plate (7), the lower positioning plate (4) is mounted on the lower positioning plate (7), the upper positioning plate (5) is mounted on the upper positioning plate (6), and a first rotating shaft is arranged between the upper positioning plate (6) and the lower positioning plate (7).

2. The circuit board loading access device for a circuit board burning test apparatus according to claim 1, wherein The upper positioning plate (6) is provided with a linear driving mechanism for driving the upper positioning plate (5) to move along a straight line perpendicular to the upper positioning plate (6) and towards the lower positioning plate (4).

3. The circuit board loading access device for a circuit board burning test apparatus according to claim 2, wherein The linear driving mechanism comprises a linear driver (8) mounted on the upper positioning plate (6), the driving direction of the linear driver (8) is perpendicular to the upper positioning plate (6), and the output end of the linear driver (8) is provided with a mounting plate (9) arranged between the upper positioning plate (6) and the lower positioning plate (7), the mounting plate (9) is arranged parallel to the upper positioning plate (6), and the upper positioning plate (5) is mounted on the mounting plate (9).

4. The circuit board loading access device for a circuit board burning test apparatus according to claim 3, wherein The mounting plate (9) is further provided with an identification device (10), and the mounting plate (9) and the upper positioning plate (5) are both provided with windows, when the upper positioning plate (5) and the lower positioning plate (4) are matched to the position, the identification device (10) identifies a specified area on the circuit board (15) to be tested, and whether the loaded circuit board (15) is correct is judged.

5. The circuit board loading access device for a circuit board burning test apparatus according to claim 1, wherein The board locking mechanism comprises a support (7a) fixedly mounted on the lower positioning plate (7), and the support (7a) has a support end (7a1) extending towards the upper positioning plate (6).

6. A circuit board loading access device for a circuit board burning test apparatus according to claim 5, wherein The board locking mechanism further comprises a locking member (6a) rotationally connected with the upper positioning plate (6), and the locking member (6a) is provided with a hook (6a1) at the end thereof, and the support (7a) is provided with a hook groove (7a2) matched with the hook (6a1).

7. A circuit board loading access device for a circuit board burning test apparatus according to claim 6, wherein The lower positioning plate (7) is provided with two supports (7a), the upper positioning plate (6) is provided with two locking members (6a), and the two locking members (6a) are connected with a rear pull rod (13).

8. The circuit board loading access device for a circuit board burning test apparatus according to claim 6, wherein The board locking mechanism further comprises a safety lock device, the safety lock device comprises a lock rod (11) mounted on both sides of the mounting plate (9) or both sides of the lower positioning plate (4), the locking member (6a) is provided with a lock shaft (6a2), and the front end of the lock rod (11) is provided with a lock hole with the mouth downward, when the upper positioning plate (5) is matched with the lower positioning plate (4) to the position, the lock hole hooks the lock shaft (6a2) from top to bottom.

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