High-density plug-in structure and dismounting method of printed board in narrow space

Abstract

This application discloses a high-density interlocking structure and disassembly method for printed circuit boards in confined spaces, relating to the field of electrical interconnection technology for electrical equipment. It includes a first module and a second module interlocked with it, forming an installation space between them. Several quick-release components are provided between the first and second modules. Each quick-release component includes a positioning post and a first bolt. The positioning post is located within the installation space, with its two ends abutting against the first and second modules respectively. The end face of the positioning post facing the first module has a first internal threaded hole, and the bottom of the first internal threaded hole has a first driving groove. The first bolt passes through a first through hole on the first module and is threadedly connected to the first internal threaded hole. The end face of the positioning post facing the second module has an external threaded post, which is threadedly connected to a second internal threaded hole on the second module. This application changes the traditional disassembly method from a pull-out type to a push-out type, significantly reducing the external force required for a single operation and the operational difficulty.

Description

Technical Field

[0001] This application relates to the field of electrical interconnection technology for electrical equipment, specifically to a high-density interlocking structure for printed circuit boards in confined spaces and a disassembly method. Background Technology

[0002] As electronic devices rapidly evolve towards miniaturization, lightweight design, and high performance, connector mating is increasingly replacing traditional cable interconnections in the interconnection of printed circuit boards (PCBs) with different functional modules. This interconnection method effectively reduces the space occupied by cables, improves system integration, and meets the compact design requirements of modern electronic devices. However, with the continuous integration and enhancement of device functions and performance, the wiring density per unit area of ​​the PCB has significantly increased, and the number of layers within the board has also increased, leading to a substantial increase in the number of connector pins. Some high-density integrated devices have over 1000 pins between boards, while the single-core insertion and extraction force of a connector is typically in the range of 0.8–1N. Therefore, when disassembling and separating modules, the total extraction force can easily exceed 800N, posing a significant challenge to PCB disassembly.

[0003] Regarding the disassembly problem of the aforementioned high-density interlocking structure, existing technologies mainly offer two solutions. One is the traditional method of manually prying it apart. Operators forcibly separate the interlocking printed circuit boards (PCBs) by hand or with simple tools. However, due to excessive pulling force, this easily causes PCB warping, component damage, or solder joint cracking, severely impacting product reliability and lifespan. The other, and more commonly used, improved method involves evenly fixing several nuts to the PCB. During disassembly, screws are first installed to engage with the nuts on the PCB, and then specialized tooling such as a puller is used to lift the PCB as a whole, thus achieving separation and disassembly of the two PCBs. This method, compared to manual prying, can distribute the force to a certain extent, reducing the risk of localized damage.

[0004] However, the method of disassembling by installing nuts on the printed circuit board and using special tooling still has the following drawbacks: First, facing a huge pulling force of over 800N, the operation is still very difficult. It requires the design of complex special tooling and the application of a large external force to complete the disassembly. Not only is the operation inefficient, but the tooling is also difficult to accurately position and apply force in a confined space, still posing a risk of damaging the printed circuit board or surrounding components. This makes it difficult to meet the actual needs of convenient and safe maintenance of high-density integrated equipment. Second, the installation of nuts and matching screws requires valuable space resources on the printed circuit board. In the already limited internal space of miniaturized equipment, the additional fixing structure will further squeeze the wiring space and component layout space, contradicting the miniaturization design goal of the equipment. Summary of the Invention

[0005] The purpose of this application is to provide a high-density interlocking structure and disassembly method for printed circuit boards in confined spaces, which solves the problem that existing disassembly methods require a large external force to complete the disassembly and are prone to causing damage to the printed circuit board.

[0006] The technical solution adopted by this application to solve its technical problem is: In a first aspect, a high-density interlocking structure for printed circuit boards in a confined space is provided, comprising a first module and a second module interlocking with it, wherein an installation space is formed between the two modules around the interlocking connection position. A plurality of quick-release components are provided between the first module and the second module. Each quick-release component includes a positioning post and a first bolt. The positioning post is located in the installation space and its two ends abut against the first module and the second module, respectively. The positioning post has a first internal threaded hole on its end face facing the first module. The bottom of the first internal threaded hole has a first drive groove that mates with a first screwdriver. The first bolt passes through a first through hole on the first module and is threadedly connected to the first internal threaded hole. The positioning post has an external threaded post on its end face facing the second module. The external threaded post is threadedly connected to a second internal threaded hole on the second module.

[0007] Furthermore, the first drive slot includes a slotted slot, a cross slot, an internal hexagonal slot, a Torx slot, or a square slot.

[0008] Furthermore, the positioning post and the external threaded post are integrally formed.

[0009] Furthermore, the end face of the positioning post facing the first module is provided with a second drive groove that cooperates with the second screwdriver.

[0010] Furthermore, the second drive slot is a slot with a single line.

[0011] Furthermore, the first module includes a first printed circuit board and a connector plug connected thereto, the second module includes a second printed circuit board and a connector socket connected thereto, the connector plug and the connector socket are mated together, the first printed circuit board and the second printed circuit board form the mounting space around the mating connection position, the two ends of the positioning post abut against the first printed circuit board and the second printed circuit board respectively, the first through hole is provided on the first printed circuit board, and the second internal thread hole is provided on the second printed circuit board.

[0012] Furthermore, it also includes a first outer shell and a second outer shell connected thereto, with the two forming a closed mounting cavity; the first module and the second module are disposed in the mounting cavity, and the external threaded post is threadedly connected to the third internal threaded hole on the mounting cavity.

[0013] Furthermore, a plurality of connecting plates are evenly distributed along the circumference of the second outer shell, the connecting plates extending to the outer side of the first outer shell, and the connecting plates being connected to the first outer shell by a third bolt.

[0014] Furthermore, the outer surface of the first housing is provided with a plurality of grooves along its circumference, and the grooves correspond one-to-one with the connecting plate, with the connecting plate disposed in the corresponding groove.

[0015] Secondly, a method for disassembling a high-density interlocking structure on a printed circuit board in a confined space is provided, including: Remove all the first bolts between the first module and the positioning post; The first screwdriver is passed through the first through hole and inserted into the first drive groove at the bottom of the first internal thread hole to achieve the driving engagement between the first screwdriver and the positioning pin. Apply a reverse rotational torque to the positioning pin with the first screwdriver, causing the positioning pin and the external threaded pin connected to it to be rotated in the opposite direction synchronously. In a round-by-round operation, all positioning pins and external threaded pins are rotated in the opposite direction in several rounds. Each round rotates all positioning pins and external threaded pins a predetermined number of times in the opposite direction. During the reverse screwing process, the threaded engagement between the external threaded post and the second internal threaded hole generates an axial thrust force, which pushes the first module away from the second module through the positioning post. The reverse screwing operation is repeated round by round until the first module and the second module are completely separated.

[0016] The beneficial effects of this application are: The high-density interlocking structure and disassembly method for printed circuit boards in confined spaces provided in this application embodiment transforms the traditional disassembly method from a pull-out type to a push-out type by setting several quick-release components between the first module and the second module. It makes full use of the force-saving characteristics of threaded transmission, decomposing the hundreds of Newtons of pulling force that originally needed to be overcome in one go into a multi-round, small-torque, progressive screwing operation, which significantly reduces the external force required for a single operation and the difficulty of operation. The positioning post is integrated in the unused installation space around the interlocking connection position, without taking up valuable wiring area of ​​the printed circuit board. Moreover, the first drive slot adopts a hidden design, which allows the screwdriver to be directly inserted from the first through hole on the outside of the first module for operation. It is perfectly adapted to the maintenance operation environment in confined spaces. While ensuring the safe and non-destructive disassembly of the high-density printed circuit board, it also takes into account the needs of equipment miniaturization and maintenance convenience. Furthermore, this application only requires opening a first through hole and a second internal threaded hole on the printed circuit board, which effectively improves the utilization rate of the printed circuit board area compared with the method of fixing nuts in the prior art; and the disassembly process can be completed with a general screwdriver without relying on special tooling, which further reduces the complexity of operation and the risk of damaging the printed circuit board or surrounding devices. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a front view of the high-density interlocking structure of a printed circuit board in a confined space provided in the embodiments of this application; Figure 2 yes Figure 1 Sectional view along line AA; Figure 3 This is a three-dimensional structural diagram of the positioning post; Figure 4 This is a plan view of the positioning post; Figure 5 yes Figure 4 Sectional view along the BB line; Figure 6 This is a schematic diagram of the structure in which the high-density interlocking structure of the printed circuit board in a confined space provided in the embodiment of this application is installed in the mounting cavity between the first housing and the second housing; Figure 7 yes Figure 6 A schematic diagram of the exploded structure; Figure 8 This is a cross-sectional view of the second outer shell.

[0019] Figure label: 1-First module; 11-First printed circuit board; 111-First through hole; 12-Connector plug; 2-Second module; 21-Second printed circuit board; 211-Second internal threaded hole; 22-Connector socket; 3- Installation space; 4-Quick release assembly; 41-Positioning pin; 411-First internal threaded hole; 412-First drive groove; 413-External threaded pin; 414-Second drive groove; 42-First bolt; 5-First outer shell; 51-Groove; 6-Second outer casing; 61-Third internal threaded hole; 62-Connecting plate; 7-Installation cavity. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0021] In the description of this application, the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in actual application, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 This application provides a high-density interlocking structure for a printed circuit board in a confined space, including a first module 1 and a second module 2 interlocked with it, forming an installation space 3 around the interlocking connection position. Several quick-release components 4 are provided between the first module 1 and the second module 2. Each quick-release component 4 includes a positioning post 41 and a first bolt 42. The positioning post 41 is located within the installation space 3, with its two ends abutting against the first module 1 and the second module 2 respectively. The end face of the positioning post 41 facing the first module 1 has a first internal threaded hole 411, and the bottom of the first internal threaded hole 411 has a first drive groove 412 that mates with a first screwdriver. The first bolt 42 passes through a first through hole 111 on the first module 1 and is threadedly connected to the first internal threaded hole 411. The end face of the positioning post 41 facing the second module 2 has an external threaded post 413, which is threadedly connected to a second internal threaded hole 211 on the second module 2.

[0024] Specifically, the first module 1 and the second module 2 are high-density printed circuit board modules, meaning that the wiring density per unit area of ​​the printed circuit board is high. When the first module 1 and the second module 2 are connected by mating, a gap area is formed around the mating connection point, which is the installation space 3. Several quick-release components 4 are located between the first module 1 and the second module 2 for disassembling the first module 1 and the second module 2, and can reduce the external force required for a single operation and the difficulty of operation during disassembly. The position and number of quick-release components 4 should be set according to the total insertion and extraction force after the first module 1 and the second module 2 are mated, the planar dimensions and bending stiffness of the first module 1 and the second module 2, the wiring no-running areas on the first module 1 and the second module 2, and the device layout restrictions, and are not uniquely limited here.

[0025] The quick-release assembly 4 includes a positioning post 41 and a first bolt 42. The positioning post 41 is a cylindrical structure located within the installation space 3, with its two ends abutting against the first module 1 and the second module 2 respectively, forming axial support rather than a fixed connection. A first internal threaded hole 411 is located on the end face of the positioning post 41 facing the first module 1, with its axis coinciding with the axis of the positioning post 41. A first through hole 111 is provided on the first module 1 directly opposite the first internal threaded hole 411. The first through hole 111 is a smooth hole with an inner diameter slightly larger than the diameter of the shank of the first bolt 42, serving as a guide and clearance. The first bolt 42 passes through the first through hole 111 on the first module 1 and is threaded into the first internal threaded hole 411, achieving detachable fixation between the first module 1 and the positioning post 41. A first drive groove 412 is located at the bottom of the first internal threaded hole 411, i.e., at the center of the bottom of the first internal threaded hole 411. The opening of the first drive groove 412 faces the first module 1 and is opposite to the first through hole 111, forming a tool insertion channel. The first drive groove 412 engages with the first screwdriver and can withstand rotational torque to achieve torque transmission. By hiding the first drive groove 412 at the bottom of the first internal threaded hole 411, it does not occupy additional space and is protected by the side wall of the first internal threaded hole 411 to avoid damage. The external threaded post 413 is located on the end face of the positioning post 41 facing the second module 2 and is arranged coaxially with the positioning post 41. The length of the external threaded post 413 is greater than or equal to the insertion connection depth between the first module 1 and the second module 2. The second module 2 has a through second internal threaded hole 211 located directly opposite the external threaded post 413. The external threaded post 413 and the second internal threaded hole 211 are threadedly engaged to form a helical transmission pair, which simultaneously enables the second module 2 and the positioning post 41 to be detachably fixed. The rotation direction of this threaded engagement is designed as follows: when rotating in the forward direction, the external threaded post 413 is screwed into the second internal threaded hole 211, and the positioning post 41 is closer to the second module 2; when rotating in the reverse direction, the external threaded post 413 is screwed out of the second internal threaded hole 211, and the positioning post 41 is away from the second module 2. This helical drive converts rotational motion into axial linear motion, utilizing the mechanical advantages of the thread to amplify force.

[0026] See Figure 1 , Figure 2 The disassembly method for the high-density interlocking structure of a printed circuit board in a confined space provided in the above embodiments includes the following steps: S1. Remove all first bolts 42 between the first module 1 and the positioning post 41.

[0027] Specifically, the operator uses a screwdriver that matches the head of the first bolt 42 to loosen and completely remove all the first bolts 42, thus terminating the fixed connection between the first module 1 and the positioning post 41. During this process, the positioning post 41 remains connected to the second module 2 via the external thread post 413, and the first module 1 is only engaged with the second module 2 through the insertion force of the connector.

[0028] S2. Pass the first screwdriver through the first through hole 111 and insert it into the first drive groove 412 at the bottom of the first internal thread hole 411 to achieve the driving engagement between the first screwdriver and the positioning post 41.

[0029] Specifically, select a first screwdriver of appropriate specifications, meaning the screwdriver tip matches the first drive groove 412, and the diameter of the shank is smaller than the diameter of the first through hole 111. Pass the shank of the first screwdriver axially through the first through hole 111 on the first module 1, continuing until the screwdriver tip is fully embedded in the first drive groove 412 at the bottom of the first internal thread hole 411, ensuring a tight fit between the screwdriver tip and the groove wall of the first drive groove 412, enabling reliable transmission of rotational torque. At this point, the shank of the first screwdriver passes through the first through hole 111, with its head located outside the first module 1, forming an operating handle.

[0030] S3. Apply a reverse rotational torque to the positioning pin 41 using the first screwdriver, causing the positioning pin 41 and the external threaded pin 413 connected to it to be rotated in the opposite direction synchronously. In a round-by-round operation, all positioning pins 41 and external threaded pins 413 are rotated in the opposite direction in stages. In each round, all positioning pins 41 and external threaded pins 413 are rotated in the opposite direction a predetermined number of times.

[0031] Specifically, "reverse" is defined as the direction opposite to the tightening direction during installation, usually counterclockwise. Operators should follow these steps: S3.1 Control the first screwdriver to drive one of the positioning pins 41 to rotate in the opposite direction for a predetermined number of turns. The predetermined number of turns can be determined according to the thread lead and the required pushing stroke. In this embodiment, the predetermined number of turns can be 1 / 4 turn, 1 / 2 turn, or 1 turn.

[0032] S3.2. Move the first screwdriver to the next positioning post 41 in sequence and repeat the reverse screwing operation until all positioning posts 41 have been screwed in this round.

[0033] S3.3 Repeat steps S3.1 and S3.2 for multiple rounds of operation, with each positioning post 41 being turned the same number of times in each round.

[0034] This sequential, step-by-step operation ensures that the first module 1 is evenly stressed at each support point, avoiding tilting and jamming caused by unilateral pushing. After each round of operation, the operator can observe the separation status of the first module 1, check for any abnormalities such as jamming or tilting, and adjust the operation strategy in a timely manner to ensure process control.

[0035] S4. During the reverse screwing process, the threaded engagement between the external threaded post 413 and the second internal threaded hole 211 generates an axial thrust force and pushes the first module 1 through the positioning post 41, causing the first module 1 to gradually move away from the second module 2; repeat the reverse screwing operation round by round until the first module 1 and the second module 2 are completely separated.

[0036] Specifically, when the external threaded post 413 rotates in the opposite direction relative to the second internal threaded hole 211, according to the thread direction design, the external threaded post 413 generates axial displacement, causing the positioning post 41 to move away from the second module 2. Since the end face of the positioning post 41 abuts against the first module 1, the axial thrust is transmitted to the first module 1 through the positioning post 41, enabling it to overcome the pull-out force of the connector mating and gradually move away from the second module 2. By repeating step S3 in successive rounds, the distance between the first module 1 and the second module 2 gradually increases, and the mating depth gradually decreases until they are completely separated. After separation, the first module 1 is supported by the positioning post 41 and can be safely removed.

[0037] The high-density interlocking structure and disassembly method for printed circuit boards in confined spaces provided in this application embodiment transforms the traditional disassembly method from a pull-out type to a push-out type by setting several quick-release components 4 between the first module 1 and the second module 2. It makes full use of the force-saving characteristics of threaded transmission, decomposing the hundreds of Newtons of pulling force that originally needed to be overcome at once into a multi-round, small-torque, progressive screwing operation, which significantly reduces the external force required for a single operation and the difficulty of operation. The positioning post 41 is integrated into the unused installation space 3 around the interlocking connection position, without taking up the valuable wiring area of ​​the printed circuit board. Moreover, the first drive slot 412 adopts a hidden design, which allows the screwdriver to be directly inserted from the first through hole 111 on the outside of the first module 1 for operation. It is perfectly adapted to the maintenance operation environment in confined spaces. While ensuring the safe and non-destructive disassembly of the high-density printed circuit board, it also takes into account the requirements of equipment miniaturization design and maintenance convenience. Furthermore, this application only requires opening a first through hole 111 and a second internal threaded hole 211 on the printed circuit board, which effectively improves the utilization rate of the printed circuit board area compared with the method of fixing nuts in the prior art; and the disassembly process can be completed with a general screwdriver without relying on special tooling, which further reduces the complexity of operation and the risk of damaging the printed circuit board or surrounding devices.

[0038] In some embodiments, see Figure 4 , Figure 5 The first drive slot 412 includes a flathead slot, a Phillips head slot, a hexagonal head slot, a Torx head slot, or a square head slot. Accordingly, by setting the first drive slot 412 to a common slot type, existing conventional tools can be used directly, eliminating the need for customized special tools, thus reducing maintenance costs and tool management complexity. Furthermore, different types of first drive slots 412 can be selected according to the actual pulling force; flathead or Phillips head slots are used for low pulling force, while hexagonal or Torx head slots are used for high pulling force. In this embodiment, the first drive slot 412 is a flathead slot, suitable for flathead screwdrivers, ensuring strong tool versatility.

[0039] In some embodiments, see Figure 3 , Figure 5 The positioning post 41 and the external threaded post 413 are integrally formed. Specifically, the positioning post 41 and the external threaded post 413 can be precision machined from the same round steel. Correspondingly, integral forming eliminates the connection interface of split structures, avoiding stress concentration problems associated with threaded connections, pin connections, or welding. At the same time, integral forming can ensure the coaxiality of the positioning post 41 and the external threaded post 413 through precision machining, ensuring the precise fit between the external threaded post 413 and the second internal threaded hole 211, improving transmission efficiency and disassembly smoothness.

[0040] In some embodiments, see Figure 3 , Figure 4 , Figure 5 The positioning post 41 has a second drive groove 414 on its end face facing the first module 1, which mates with the second screwdriver. For example, the second drive groove 414 is a slotted groove. Accordingly, the second drive groove 414 provides an additional operating interface, complementing the first drive groove 412. During installation, the tip of the second screwdriver can be inserted into the second drive groove 414 and rotated clockwise to screw the external threaded post 413 into the second internal threaded hole 211. During disassembly, the tip of the first screwdriver can be inserted into the first drive groove 412 and rotated counterclockwise to unscrew the external threaded post 413 out of the second internal threaded hole 211.

[0041] In some embodiments, see Figure 1 , Figure 2 The first module 1 includes a first printed circuit board 11 and a connector plug 12 connected thereto. The second module 2 includes a second printed circuit board 21 and a connector socket 22 connected thereto. The connector plug 12 and the connector socket 22 are connected by mating. An installation space 3 is formed between the first printed circuit board 11 and the second printed circuit board 21 around the mating connection position. The two ends of the positioning post 41 abut against the first printed circuit board 11 and the second printed circuit board 21 respectively. A first through hole 111 is provided on the first printed circuit board 11, and a second internal thread hole 211 is provided on the second printed circuit board 21.

[0042] Specifically, both the first printed circuit board 11 and the second printed circuit board 21 are high-density multilayer printed circuit boards. A connector plug 12 is fixed on one surface of the first printed circuit board 11, and a connector socket 22 is fixed on one surface of the second printed circuit board 21. When the connector plug 12 and the connector socket 22 are connected, the gap between the first printed circuit board 11 and the second printed circuit board 21 forms the installation space 3.

[0043] Correspondingly, the quick-release assembly 4 is fully integrated into the mounting space 3 between the first printed circuit board 11 and the second printed circuit board 21, without occupying the component placement area and wiring channels on the surface of the printed circuit board, minimizing interference with high-density wiring. At the same time, during disassembly, the pushing force acts directly on the body of the first printed circuit board 11 and is evenly transmitted to the entire module through its rigid plane, avoiding problems such as pin bending and solder joint tearing caused by force transmission through connectors.

[0044] In some embodiments, see Figure 6 , Figure 7 , Figure 8 It also includes a first outer shell 5 and a second outer shell 6 connected thereto, and the two form a closed mounting cavity 7; the first module 1 and the second module 2 are located in the mounting cavity 7, and the external threaded post 413 is threadedly connected to the third internal threaded hole 61 on the mounting cavity 7.

[0045] Specifically, both the first outer shell 5 and the second outer shell 6 are cylindrical structures with one open end and one closed end. The open ends of the first outer shell 5 and the second outer shell 6 are joined together, forming a closed mounting cavity 7 between them. The size of the mounting cavity 7 is slightly larger than the combined size of the first module 1 and the second module 2, so that the assembled first module 1 and the second module 2 can be placed inside the mounting cavity 7, thereby providing electromagnetic shielding and physical protection. For example, the third internal threaded hole 61 is located at the bottom of the inner cavity of the second outer shell 6 and is coaxially arranged with the second internal threaded hole 211. During installation, the external threaded post 413 can be screwed into the second internal threaded hole 211 and the third internal threaded hole 61 in sequence to mechanically connect the external threaded post 413 to the second outer shell 6, thereby positioning the combined first module 1 and the second module 2 within the mounting cavity 7.

[0046] Correspondingly, by combining the first module 1 and the second module 2 and installing them in the closed mounting cavity 7 formed between the first housing 5 and the second housing 6, a Faraday cage structure is formed, which effectively protects the internal high-density signal transmission from external electromagnetic interference and prevents the leakage of internal high-frequency signals. It also serves to prevent dust and water splashes, protect the precision printed circuit board and connectors from harsh environmental corrosion, and improve product reliability and service life.

[0047] In some embodiments, see Figure 6 , Figure 7 , Figure 8 Multiple connecting plates 62 are evenly distributed along the circumference of the second outer shell 6. The connecting plates 62 extend to the outside of the first outer shell 5 and are connected to the first outer shell 5 by a third bolt.

[0048] Specifically, the connecting plates 62 comprise 4-8 plates, evenly distributed along the circumference of the second outer shell 6. Each connecting plate 62 is a rectangular flat plate, extending axially outward from the open end of the second outer shell 6 to the outer side of the first outer shell 5. The connecting plate 62 has a clear hole, and the side wall of the first outer shell 5 has an internally threaded hole. The third bolt passes through the clear hole on the connecting plate 62 and is threaded into the internally threaded hole on the first outer shell 5. During disassembly, the third bolt is removed first, then the first outer shell 5 is removed, followed by the first module 1, and then the second module 2. Correspondingly, this connection method is simple in structure and easy to operate.

[0049] In some embodiments, see Figure 6 , Figure 7 The outer surface of the first outer shell 5 has multiple grooves 51 along its circumference, each corresponding to a connecting plate 62, with the connecting plate 62 positioned within its corresponding groove 51. Correspondingly, the sidewalls of the grooves 51 engage with the sidewalls of the connecting plates 62, forming a circumferential constraint. When the third bolt loosens due to vibration or other reasons, the sidewalls of the grooves 51 prevent the connecting plate 62 from rotating relative to the first outer shell 5, preventing separation of the outer shell and improving the safety and reliability of the connection. Simultaneously, by matching the depth of the grooves 51 with the thickness of the connecting plates 62, the connecting plates 62 can be completely embedded within the grooves 51, resulting in a continuous curved surface on the outer shell without protrusions, avoiding interference, collisions, or wasted installation clearance caused by protrusions in the outer shell.

[0050] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A high-density interlocking structure for a printed circuit board in a confined space, comprising a first module (1) and a second module (2) interlocking with it, wherein an installation space (3) is formed between the two modules around the interlocking connection position. Its features are, A number of quick-release components (4) are provided between the first module (1) and the second module (2). The quick-release components (4) include a positioning post (41) and a first bolt (42). The positioning post (41) is located in the installation space (3) and its two ends abut against the first module (1) and the second module (2) respectively. The positioning post (41) has a first internal threaded hole (411) on its end face facing the first module (1). The bottom of the first internal threaded hole (411) has a first drive groove (412) that cooperates with the first screwdriver. The first bolt (42) passes through the first through hole (111) on the first module (1) and is threadedly connected to the first internal threaded hole (411). The positioning post (41) has an external threaded post (413) on its end face facing the second module (2). The external threaded post (413) is threadedly connected to the second internal threaded hole (211) on the second module (2).

2. The high-density interlocking structure for printed circuit boards in confined spaces according to claim 1, characterized in that, The first drive slot (412) includes a slotted slot, a cross slot, an internal hexagonal slot, a Torx slot, or a square slot.

3. The high-density interlocking structure for printed circuit boards in confined spaces according to claim 1, characterized in that, The positioning post (41) and the external thread post (413) are integrally formed.

4. The high-density interlocking structure for printed circuit boards in confined spaces according to claim 1, characterized in that, The positioning post (41) has a second drive groove (414) on its end face facing the first module (1) to cooperate with the second screwdriver.

5. The high-density interlocking structure for printed circuit boards in confined spaces according to claim 4, characterized in that, The second drive slot (414) is a slot.

6. The high-density interlocking structure for printed circuit boards in confined spaces according to claim 1, characterized in that, The first module (1) includes a first printed circuit board (11) and a connector plug (12) connected thereto. The second module (2) includes a second printed circuit board (21) and a connector socket (22) connected thereto. The connector plug (12) and the connector socket (22) are connected to each other. The first printed circuit board (11) and the second printed circuit board (21) form the installation space (3) located around the docking connection position. The two ends of the positioning post (41) abut against the first printed circuit board (11) and the second printed circuit board (21) respectively. The first through hole (111) is provided on the first printed circuit board (11), and the second internal thread hole (211) is provided on the second printed circuit board (21).

7. The high-density interlocking structure for printed circuit boards in confined spaces according to claim 1, characterized in that, It also includes a first outer shell (5) and a second outer shell (6) connected thereto, and the two form a closed mounting cavity (7); the first module (1) and the second module (2) are located in the mounting cavity (7), and the external threaded post (413) is threadedly connected to the third internal threaded hole (61) on the mounting cavity (7).

8. The high-density interlocking structure for printed circuit boards in confined spaces according to claim 7, characterized in that, Multiple connecting plates (62) are evenly distributed along the circumference of the second outer shell (6). The connecting plates (62) extend to the outside of the first outer shell (5) and are connected to the first outer shell (5) by a third bolt.

9. The high-density interlocking structure for printed circuit boards in confined spaces according to claim 8, characterized in that, The outer surface of the first outer shell (5) is provided with a plurality of grooves (51) along its circumference. The grooves (51) correspond one-to-one with the connecting plate (62), and the connecting plate (62) is disposed in the groove (51) corresponding to it.

10. A method for disassembling a high-density interlocking structure of a printed circuit board in a confined space as described in any one of claims 1 to 6, characterized in that, include: Remove all first bolts (42) between the first module (1) and the positioning post (41); The first screwdriver is passed through the first through hole (111) and inserted into the first drive groove (412) at the bottom of the first internal thread hole (411) to achieve the drive engagement between the first screwdriver and the positioning pin (41); Apply a reverse rotational torque to the positioning pin (41) with the first screwdriver, causing the positioning pin (41) and the external threaded pin (413) connected to it to be rotated in the opposite direction synchronously. By adopting the method of operation in round by round, all positioning pins (41) and external threaded pins (413) are rotated in the opposite direction in rounds. Each round rotates all positioning pins (41) and external threaded pins (413) a predetermined number of times in the opposite direction. During the reverse screwing process, the threaded engagement between the external threaded post (413) and the second internal threaded hole (211) generates an axial thrust force and pushes the first module (1) through the positioning post (41), causing the first module (1) to gradually move away from the second module (2); repeat the reverse screwing operation round by round until the first module (1) and the second module (2) are completely separated.

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