A modular PCB board that facilitates rapid expansion

Abstract

The present invention discloses a modular PCB board that is convenient for rapid expansion, comprising a bottom support plate, multiple PCB substrates, a pressure plate, a rotating rod, a driving rod, and a rotating rod. A movable rod is provided between the rotating rod and the rotating rod via a limiter. The top ends of the driving rod and the rotating rod are both provided with an extrusion member for extruding the movable rod. A pressure plate is provided at the middle of the movable rod via a control member, and the pressure plate is pressed and matched with the rotating rod. By continuously rotating the rotating rod, the multiple PCB substrates from bottom to top are moved downward in sequence, thereby achieving close fitting layer by layer. Not all PCB substrates are pressed at the same time, but the pressing is sequential, from bottom to top, and gradually squeezed. This method ensures close fitting between the multiple PCB substrates. This method is simple and convenient to operate, has low cost, is quick to install, and ensures a multi-layer circuit board with a compact structure and excellent electrical performance. Moreover, a certain PCB substrate can be installed and replaced, which is convenient for reuse and achieves sustainable development.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB board installation structures, and in particular to a modular PCB board that is easy to quickly expand. Background Art

[0002] PCBs serve as the connecting bridge between electronic components, and their quality and manufacturing process directly impact the performance and reliability of the entire device. During the lamination and stacking process, wrinkling often occurs. Lamination refers to the process of stacking multiple PCBs with copper foil and insulating material (usually prepreg made of epoxy resin and fiberglass cloth) on their outer surfaces. Wrinkling occurs when unevenness, wavy shapes, or wrinkles appear on or within the PCB surface during the lamination and stacking process.

[0003] The main reason for the wrinkling during press-fitting is that the existing modular assembly method for quick assembly mainly uses high temperature and high pressure to tightly bond the multi-layer PCB boards. However, this method cannot effectively avoid factors such as uneven preheating and improper temperature control, and the high-temperature bonding operation is difficult.

[0004] To this end, we propose a modular PCB board that is easy to expand quickly. Summary of the Invention

[0005] The purpose of the present invention is to provide a modular PCB board that is easy to expand quickly, so as to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides a modular PCB board that is easy to expand quickly, including a bottom support plate and multiple PCB substrates that cooperate with each other. A groove is opened in the middle of the PCB substrate, and a pressure plate is fixedly connected in the groove. The bottom support plate is plugged into and cooperates with the multiple PCB substrates.

[0007] The cam is provided with a plurality of movable rods, and a plurality of movable rods are provided on the cam, and a plurality of movable rods are provided on the cam. The movable rod is provided with a plurality of movable rods, and a plurality of movable rods are provided on the cam. The movable rod is provided with a plurality of movable rods, and a plurality of movable rods are provided on the cam. The plurality of movable rods are provided with a plurality of movable rods, and a plurality of movable rods are provided with a plurality of movable rods ...

[0008] By continuously rotating the rotating rod, the extrusion member squeezes the movable rod, so that the plurality of rotating rods move downward one by one and rotate to fit the pressing plate, so that the gaps of the plurality of PCB substrates from bottom to top are tightly fitted one by one;

[0009] The fixing part is used to prevent the rotating rods from rotating after the plurality of rotating rods press the pressing plate one by one to make the plurality of PCB substrates adhere to each other one by one.

[0010] Preferably, the pressing plate includes a sleeve fixedly connected to the PCB substrate, a circular plate is fixedly connected to the bottom of the sleeve, a through hole is opened in the middle of the circular plate, and the surface of the rotating rod is pressed and fitted with the edge of the through hole.

[0011] Preferably, the end of the rotating rod is rotatably connected to a matching plate that is distributed obliquely, the control component includes a pull rope, and one end of the matching plate is pressed against the inner wall of the sleeve.

[0012] Preferably, the limiting member includes a rotating cylinder that slides with the rotating rod, a connecting rod that is fixedly connected to the rotating cylinder and hingedly cooperates with the rotating rod, a first limiting plate that is fixedly connected to the connecting rod and movably cooperates with the rotating rod, and a second limiting plate that is fixedly connected to the rotating rod, the first limiting plate and the second limiting plate are triangular structures, and the first limiting plate and the second limiting plate are provided with sliding grooves that slide with the movable rod.

[0013] Preferably, the extrusion member includes a fixing rod, the fixing rod is connected and fixed to the top end of the rotating rod and the top end of the driving rod, and the first extrusion plate and the second extrusion plate are fixedly connected to the fixing rod.

[0014] Preferably, the length of the first extruded plate is smaller than the length of the second extruded plate, and the pull rope is located between the first extruded plate and the second extruded plate.

[0015] Preferably, an elastic column is fixedly connected to the bottom of the second limiting plate and is clamped between the first extrusion plate and the second extrusion plate.

[0016] Preferably, the fixing part includes a control rod, a rotating groove that rotates with the control rod is provided at the top of the rotating rod, and a sliding groove that is connected to the rotating groove is provided at the end of the rotating rod. The end of the control rod is fixedly connected to an insertion rod that slides with the sliding groove, and an embedded groove that cooperates with the control rod is provided on the PCB substrate located at the top, and the embedded groove is an L-shaped structure.

[0017] Preferably, movable balls that slide in cooperation with the sliding grooves are fixedly connected to both ends of the movable rod to ensure the movement of the movable rod and facilitate the rotation of the second limiting plate.

[0018] Preferably, the driving rod is an L-shaped rod, a block for limiting the rotating cylinder is fixedly connected to the rotating rod, and limiting rods penetrating the plurality of PCB substrates are fixedly connected around the bottom support plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] By continuously rotating the rotating rod, multiple PCB substrates are moved downward in sequence from bottom to top, thereby achieving a tight fit layer by layer. Not all PCB substrates are pressed together at the same time. The pressing is done in a sequential manner, from bottom to top, and gradually squeezed. This method ensures a tight fit between multiple PCB substrates. This method is simple and convenient to operate, low in cost, and allows for quick installation. It also ensures a compact structure and excellent electrical performance of the multi-layer circuit board. In addition, individual PCB substrates can be installed and replaced, facilitating reuse and achieving sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the disassembly of the multi-layer PCB substrate structure of the present invention;

[0024] Figure 4 Schematic diagram of the cooperation structure between the multi-layer PCB substrate and the rotating rod of the present invention;

[0025] Figure 5 A schematic side view of the matching structure between the multi-layer PCB substrate and the rotating rod of the present invention;

[0026] Figure 6 Schematic diagram of the cooperation structure between the pressing plate and the rotating rod of the present invention;

[0027] Figure 7 This is a schematic diagram of the matching structure between the PCB substrates located on the upper and lower layers and the rotating rod of the present invention;

[0028] Figure 8 Schematic diagram of the cooperation structure between the lower PCB substrate and the rotating rod of the present invention;

[0029] Figure 9 This is a schematic diagram of the matching structure of the rotating rod driving the rotating rod to tilt according to the present invention;

[0030] Figure 10 For the present invention Figure 9 Schematic diagram of the structure split;

[0031] Figure 11 For the present invention Figure 10 An enlarged schematic diagram of the transfer rod and its connection structure;

[0032] Figure 12 This is a schematic diagram of the structure of the driving rod pressing the rotating rod according to the present invention;

[0033] Figure 13 This is a schematic diagram of the structure of the driving rod of the present invention being away from the rotating rod and the movable rod;

[0034] Figure 14 This is a schematic diagram of the split structure of the movable rod away from the first limiting plate of the present invention.

[0035] In the figure: 1. bottom support plate; 2. PCB substrate; 3. pressure plate; 301. sleeve; 302. circular plate; 303. through hole; 304. movable slot; 4. rotating rod; 5. driving rod; 6. rotating rod; 7. movable rod; 8. matching plate; 9. pull rope; 10. rotating cylinder; 11. connecting rod; 12. first limiting plate; 13. second limiting plate; 14. sliding slot; 15. fixing rod; 16. first extrusion plate; 17. second extrusion plate; 18. elastic column; 19. control rod; 20. rotating slot; 21. sliding slot; 22. plug-in rod; 23. embedded slot; 24. movable ball; 25. limiting rod. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] See also Figures 1-14 The present invention provides a modular PCB board that is easy to expand quickly, including a bottom support plate 1 and a plurality of PCB substrates 2 that cooperate with each other. A groove is opened in the middle of the PCB substrate 2, and a pressure plate 3 is fixedly connected in the groove. The bottom support plate 1 is plugged into the plurality of PCB substrates 2;

[0038] It also includes a limiter, a control member, and a rotating rod 4 that penetrates the pressure plate 3 and is rotatably connected to the bottom support plate 1. The bottom of the rotating rod 4 is fixedly connected to a driving rod 5. A plurality of rotating rods 6 are movably matched on the rotating rod 4. A movable rod 7 is provided between the rotating rod 6 and the rotating rod 4 through a limiter. The top of the driving rod 5 and the rotating rod 6 are both provided with an extrusion member that squeezes the movable rod 7. The middle of the movable rod 7 is provided with a pressure plate 3 through a control member, and the pressure plate 3 is pressed and matched with the rotating rod 6.

[0039] By continuously rotating the rotating rod 4, the extrusion member squeezes the movable rod 7, so that the multiple rotating rods 6 move downward one by one and rotate to fit the pressing plate 3, so that the gaps of the multiple PCB substrates 2 from bottom to top are tightly fitted one by one;

[0040] The pressing plate 3 includes a sleeve 301 fixedly connected to the PCB substrate 2, and a circular plate 302 is fixedly connected to the bottom of the sleeve 301. A through hole 303 is provided in the middle of the circular plate 302. The surface of the rotating rod 6 is pressed and fitted with the edge of the through hole 303. It is worth noting that the inner wall of the sleeve 301 is provided with a movable groove 304 that cooperates with the end of the mating plate 8. The setting of the movable groove 304 ensures that the inclined mating plate 8 presses against the PCB substrate 2 on the one hand, and does not affect the rotation of the mating plate 8 along the movable groove 304 on the other hand.

[0041] The end of the rotating rod 6 is rotatably connected to a matching plate 8 that is distributed obliquely. The control member includes a pull rope 9. One end of the matching plate 8 is pressed against the inner wall of the sleeve 301.

[0042] The fixing part is used to prevent the rotating rods 6 from rotating after the multiple rotating rods 6 press the pressing plate 3 one by one to make the multiple PCB substrates 2 fit together one by one.

[0043] In this application, multiple PCB substrates 2 are first stacked on the bottom support plate 1, and the rotating rod 4 passes through the through hole 303 in the middle of the pressing plate 3. When the pressing plate 3 passes through the rotating rod 4, the through hole 303 of the pressing plate 3 contacts the inclined matching plate 8, causing the matching plate 8 to rotate, facilitating the passage of the pressing plate 3, thereby facilitating the stacking of the PCB substrates 2 on the bottom support plate 1;

[0044] To facilitate distinguishing the multiple PCB substrates 2 , the multiple PCB substrates 2 are referred to as the first substrate, the second substrate, the third substrate, ..., the nth substrate from bottom to top (in the direction gradually away from the bottom support plate 1 );

[0045] Then the rotating rod 4 is continuously rotated, and the driving rod 5 at the bottom of the rotating rod 4 rotates first. When the extrusion piece on the driving rod 5 contacts the corresponding movable rod 7 located at the bottom first substrate position and squeezes the corresponding movable rod 7 at the first substrate position, under the action of the limiter, the rotating rod 6 corresponding to the first substrate position is rotated, thereby pressing against the through hole 303 of the pressure plate 3 at the first substrate position, so that the first substrate moves downward and fits tightly on the bottom support plate 1, and the corresponding pull rope 9 at the first substrate position is tightened, thereby causing the corresponding matching plate 8 at the first substrate position to rotate, and one end of the matching plate 8 is tightly pressed against the movable groove 304 on the sleeve 301 of the pressure plate 3 on the first substrate, thereby maintaining the state that the first substrate is closely fitted on the bottom support plate 1. At this time, the second substrate, the third substrate, ..., the nth substrate remain stationary; ......

[0046] The rotating rod 4 keeps rotating, and the driving rod 5 drives the corresponding extrusion piece on the first substrate to rotate synchronously (the first substrate remains stationary and keeps in close contact with the bottom supporting plate 1, and only the corresponding matching plate 8 on the first substrate rotates along the movable groove 304 on the first substrate). When the extrusion piece on the first substrate rotates and contacts the corresponding movable rod 7 on the second substrate, the second substrate moves downward and is closely attached to the first substrate, and one end of the corresponding matching plate 8 on the second substrate is tightly pressed against the movable groove 304 of the pressing plate 3 on the second substrate, thereby maintaining the second substrate in close contact with the first substrate, while the first substrate and the bottom supporting plate 1 are still in close contact. At this time, the third substrate, ..., and the nth substrate remain stationary.

[0047] The rotating rod 4 continues to rotate so that the nth substrate is closely attached to the n-1th substrate, and then fixed by the fixing member to ensure that the first substrate, the second substrate, the third substrate, ..., the nth substrate are closely attached to each other;

[0048] In this method, by continuously rotating the rotating rod 4, multiple PCB substrates 2 from bottom to top are moved downward in sequence, thereby achieving a tight fit layer by layer. Not all PCB substrates 2 are pressed at the same time. The pressing is sequential, from bottom to top, and gradually squeezed. This method makes the multiple PCB substrates 2 fit tightly together, facilitating quick installation while ensuring a compact structure and a multi-layer circuit board with excellent electrical performance.

[0049] The limiting member includes a rotating cylinder 10 that slides with the rotating rod 4, a connecting rod 11 that is fixedly connected to the rotating cylinder 10 and hingedly cooperates with the rotating rod 6, a first limiting plate 12 that is fixedly connected to the connecting rod 11 and movably cooperates with the rotating rod 4, and a second limiting plate 13 that is fixedly connected to the rotating rod 6. The first limiting plate 12 and the second limiting plate 13 are triangular structures, and a sliding groove 14 that slides with the movable rod 7 is opened on the first limiting plate 12 and the second limiting plate 13;

[0050] By rotating the rotating rod 4 (a limit plate is fixedly inserted at the bottom of the rotating rod 4, and the limit plate is located below the bottom support plate 1 to prevent the rotating rod 4 from separating from the bottom support plate 1), under the action of the extrusion piece, the movable rod 7 is squeezed and moves downward along the inclined sliding grooves 14 on the sides of the first limit plate 12 and the second limit plate 13. Since the first limit plate 12 and the connecting rod 11 are fixed in position and the two sliding grooves 14 are inclined, the movable rod 7 that moves downward moves toward the rotating rod 6 at the same time, thereby rotating the second limit plate 13 and the rotating rod 6. The first limit plate 12 and the second limit plate 13 are arranged in a triangular structure to ensure the rotation angle of the second limit plate 13 and the rotating rod 6, so that the rotating rod 6 squeezes the PCB substrate 2 to fit tightly with the PCB substrate 2 below.

[0051] The extrusion member includes a fixed rod 15, which is connected and fixed to the top of the rotating rod 6 and the top of the driving rod 5. The fixed rod 15 is fixedly connected with a first extrusion plate 16 and a second extrusion plate 17. The rotating rod 4 is rotated to rotate the fixed rod 15, the first extrusion plate 16 and the second extrusion plate 17. The first extrusion plate 16 and the second extrusion plate 17 rotate and contact the movable rod 7. Since the first extrusion plate 16 and the second extrusion plate 17 are triangular structures, the movable rod 7 moves downward and horizontally at the same time, causing the second extrusion plate 17 and the rotating rod 6 to rotate, so that the rotating rod 6 is tilted to press against the edge of the through hole 303 on the PCB substrate 2, so that the PCB substrate 2 is tightly pressed downward to the PCB substrate 2 located below.

[0052] The length of the first extrusion plate 16 is smaller than that of the second extrusion plate 17, and the pull rope 9 is located between the first extrusion plate 16 and the second extrusion plate 17, so that when the first pressing plate 3 rotates to contact the movable rod 7, the pull rope 9 is avoided, so that the pull rope 9 is located between the first extrusion plate 16 and the second extrusion plate 17, and the pull rope 9 is further pulled (while the movable rod 7 moves downward, the pull rope 9 is pulled, so that the matching plate 8 rotates, and the matching plate 8 rotates tiltedly, and one end of the matching plate 8 presses against the inner wall of the sleeve 301, thereby further maintaining the close fit between the PCB substrates 2), by restricting the bottom of the pull rope 9 between the first extrusion plate 16 and the second extrusion plate 17, the pull rope 9 is further pulled, so that one end of the matching plate 8 is tightly pressed against the inner wall of the sleeve 301.

[0053] The bottom of the second limiting plate 13 is fixedly connected to an elastic column 18 that is clamped between the first extrusion plate 16 and the second extrusion plate 17, wherein the elastic column 18 is located on the side of the second extrusion plate 17, so that the elastic column 18 will not conflict with the position of the movable rod 7. When the rotating first extrusion plate 16 and the second extrusion plate 17 contact the movable rod 7 and squeeze the movable rod 7 to move downward, the second limiting plate 13 rotates and tilts and the rotating rod 6 tilts, and the tilted second limiting plate 13 drives the elastic column 18 to be clamped between the first extrusion plate 16 and the second extrusion plate 17 (overcoming the elasticity and causing the elastic column 18 to enter between the first pressure plate 3 and the second extrusion plate 17). When the movable rod 7 is squeezed to the bottom, the elastic column 18 located between the first pressure plate 3 and the second pressure plate 3 reacts to further ensure that the rotating rod 6 will not rotate automatically.

[0054] The fixing part includes a control rod 19, a rotating groove 20 is formed at the top of the rotating rod 4 and is rotatably engaged with the control rod 19, a sliding groove 21 is further formed at the end of the rotating rod 4 and is connected to the rotating groove 20, an insertion rod 22 is fixedly connected to the end of the control rod 19 and is slidably engaged with the sliding groove 21, and an embedding groove 23 is formed on the PCB substrate 2 at the top and is engaged with the control rod 19, and the embedding groove 23 is an L-shaped structure;

[0055] The control rod 19 is switched to a vertical state along the rotating groove 20, and the rotating rod 4 is continuously rotated so that multiple PCB substrates 2 are tightly pressed in sequence from bottom to top. Then, the control rod 19 is switched to a horizontal state along the rotating groove 20, and the rotating rod 4 is continued to be rotated so that the position of the control rod 19 corresponds to the position of the embedding groove 23. Then, the control rod 19 is controlled downward, and one end of the control rod 19 is stuck in the embedding groove 23, and the insertion rod 22 at the other end moves downward along the sliding groove 21. Finally, the control rod 19 is rotated at a small angle so that one end of the control rod 19 is rotated to the lower end of the L-shaped embedding groove 23 to prevent the control rod 19 from moving vertically upward and disengaging from the embedding groove 23.

[0056] Both ends of the movable rod 7 are fixedly connected with movable balls 24 that slide in cooperation with the sliding groove 14, so as to facilitate the movement of the movable rod 7 along the sliding groove 14, especially when the second limit plate 13 rotates with the rotating rod 6, the setting of the movable ball 24 ensures that the movable rod 7 and the second limit plate 13 slide while the second limit plate 13 rotates relative to the movable rod 7.

[0057] The driving rod 5 is an L-shaped rod, and a block for limiting the rotating cylinder 10 is fixedly connected to the rotating rod 4. The block prevents the rotating cylinder 10 from moving upward and disengaging from the rotating rod 4, and the block is detachable. The bottom support plate 1 is fixedly connected with limit rods 25 passing through multiple PCB substrates 2 at the four sides. By inserting the holes on the four sides of the PCB substrates 2 into the limit rods 25 on the bottom support plate 1, the multiple PCB substrates 2 can be quickly, accurately and flatly superimposed on one piece, which facilitates the subsequent rotation of the rotating rod 4, so that the multiple PCB substrates 2 are tightly fitted in order from bottom to top to ensure a tight fit.

[0058] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0059] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A modular PCB board that is easy to expand quickly, characterized in that: include: A bottom support plate (1) and a plurality of mutually cooperating PCB substrates (2), wherein a groove is provided in the middle of the PCB substrate (2), a pressing plate (3) is fixedly connected in the groove, and the bottom support plate (1) is plug-fitted with the plurality of PCB substrates (2); It also includes: a limiting member, a control member, and a rotating rod (4) that passes through the pressure plate (3) and is rotatably connected to the bottom support plate (1); the bottom of the rotating rod (4) is fixedly connected to a driving rod (5); the rotating rod (4) is also movably matched with a plurality of rotating rods (6); a movable rod (7) is provided between the rotating rod (6) and the rotating rod (4) through a limiting member; the top ends of the driving rod (5) and the rotating rod (6) are both provided with an extrusion member for extruding the movable rod (7); the middle part of the movable rod (7) is provided with a pressure plate (3) through the control member, and the pressure plate (3) is pressed and matched with the rotating rod (6); By continuously rotating the rotating rod (4), the extrusion member squeezes the movable rod (7), thereby causing the plurality of rotating rods (6) to move downward one by one and rotate to fit the pressing plate (3), so that the plurality of PCB substrates (2) from bottom to top are closely fitted one by one; A fixing member, wherein the fixing member is used to prevent the rotating rod (6) from rotating after the plurality of rotating rods (6) press the pressing plate (3) one by one so that the plurality of PCB substrates (2) are attached one by one; The pressing plate (3) comprises a sleeve (301) connected and fixed to the PCB substrate (2); a circular plate (302) is fixedly connected to the bottom of the sleeve (301); a through hole (303) is provided in the middle of the circular plate (302); and the surface of the rotating rod (6) is pressed against the edge of the through hole (303); The end of the rotating rod (6) is rotatably connected to a matching plate (8) that is distributed in an inclined manner. The control component includes a pull rope (9). One end of the matching plate (8) is pressed against the inner wall of the sleeve (301).

2. The modular PCB board that is easy to expand quickly according to claim 1, characterized in that: The limiting member comprises a rotating cylinder (10) that is slidably engaged with the rotating rod (4); a connecting rod (11) that is hingedly engaged with the rotating rod (6) is fixedly connected to the rotating cylinder (10); a first limiting plate (12) that is movably engaged with the rotating rod (4) is fixedly connected to the connecting rod (11); a second limiting plate (13) that is fixedly connected to the rotating rod (6); the first limiting plate (12) and the second limiting plate (13) are triangular structures; and a sliding groove (14) that is slidably engaged with the movable rod (7) is provided on the first limiting plate (12) and the second limiting plate (13).

3. The modular PCB board that is easy to expand quickly according to claim 2, characterized in that: The extrusion member comprises a fixing rod (15), the fixing rod (15) being connected and fixed to the top end of the rotating rod (6) and the top end of the driving rod (5), and a first extrusion plate (16) and a second extrusion plate (17) being fixedly connected to the fixing rod (15).

4. The modular PCB board that is easy to expand quickly according to claim 3, characterized in that: The length of the first extrusion plate (16) is smaller than the length of the second extrusion plate (17), and the pull rope (9) is located between the first extrusion plate (16) and the second extrusion plate (17).

5. The modular PCB board that is easy to expand quickly according to claim 3, characterized in that: The bottom of the second limiting plate (13) is fixedly connected to an elastic column (18) that is clamped between the first extrusion plate (16) and the second extrusion plate (17).

6. The modular PCB board that facilitates rapid expansion according to claim 1, characterized in that: The fixing member includes a control rod (19), a top end of the rotating rod (4) is provided with a rotating groove (20) that is rotatably matched with the control rod (19), an end of the rotating rod (4) is further provided with a sliding groove (21) that is connected to the rotating groove (20), an end of the control rod (19) is fixedly connected with an insertion rod (22) that is slidably matched with the sliding groove (21), and an embedding groove (23) that is matched with the control rod (19) is provided on the PCB substrate (2) located at the top, and the embedding groove (23) is L-shaped.

7. The modular PCB board that is easy to expand quickly according to claim 2, characterized in that: Both ends of the movable rod (7) are fixedly connected with movable balls (24) that slide in cooperation with the sliding groove (14).

8. The modular PCB board that facilitates rapid expansion according to claim 2, characterized in that: The driving rod (5) is an L-shaped rod, a block for limiting the rotating cylinder (10) is fixedly connected to the rotating rod (4), and limiting rods (25) that penetrate the plurality of PCB substrates (2) are fixedly connected to the periphery of the bottom support plate (1).

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