Buckling and separating mechanism for high-density board-to-board connector

Abstract

The utility model relates to the technical field of electrical element connecting devices, in particular to a buckling and separating mechanism for a high-density board-to-board connector. Comprising a first printed circuit board, a first board-to-board connector matched with the first printed circuit board, a second printed circuit board, a second board-to-board connector matched with the second printed circuit board and a bottom board, the second printed circuit board is placed on the bottom board, a hole is formed in the second printed circuit board, and a stud is placed in the hole; a groove is formed in the middle of the step screw, the groove is used for arranging the check ring, a step structure is arranged below the groove, the bottom of the step structure is a threaded section, an inner hole is formed in the supporting piece, a chamfer is arranged on the peripheral side of the bottom of the inner hole, the supporting piece is arranged below the first printed circuit board, and the inner hole is aligned with the opening in the first printed circuit board; after the check ring is installed on the step screw, the outer diameter of the check ring is smaller than the outer diameter of a chamfer at the lower end of the inner hole of the supporting piece and larger than the diameter of the inner hole of the supporting piece.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical component connection devices, in particular to a high-density board-to-board connector buckling and disengagement mechanism. Background Art

[0002] High-density board-to-board connectors typically require significant force to engage and disengage, often relying on auxiliary tools such as pullers. However, these tools are often complex, space-consuming, and relatively expensive, resulting in low efficiency and effectiveness in existing technologies for engaging and disengaging connectors.

[0003] In addition, in board-to-board connectors, height restrictions and supports are usually fixed by independent structural parts and printed circuit boards with threaded structures. The realization of this function involves multiple parts, making the installation process complicated and multi-step.

[0004] Therefore, there is an urgent need to design a high-density board-to-board connector engagement and disengagement mechanism that can integrate the connector engagement and separation, height limitation and support on a smaller number of components to improve work efficiency. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a high-density board-to-board connector engagement and disengagement mechanism, which is used to integrate the engagement and separation, height limitation and support of the connector into a few simple components, simplify the installation steps of the connector, and improve the working efficiency of the connector engagement and disengagement.

[0006] In order to achieve the above-mentioned purpose, a high-density board-to-board connector engaging and disengaging mechanism is designed, including a first printed circuit board and a first board-to-board connector mating with the first printed circuit board, a second printed circuit board and a second board-to-board connector mating with the second printed circuit board, and a base plate, the second printed circuit board is placed on the base plate, a hole is opened on the second printed circuit board, and a stud is placed in the hole; it also includes a step screw and a support member, the middle part of the step screw is provided with a groove, the groove is used to set a retaining ring, a step structure is provided below the groove, the bottom of the step structure is a threaded section, the support member is provided with an inner hole, the bottom of the inner hole is provided with a chamfer on the circumferential side, the support member is arranged below the first printed circuit board and the inner hole is aligned with the opening on the first printed circuit board, the step screw is inserted into the inner hole of the support member, after the retaining ring is installed on the step screw, the outer diameter of the retaining ring is smaller than the outer diameter of the chamfer at the lower end of the inner hole of the support member, and larger than the diameter of the inner hole of the support member, so as to ensure that the step screw will not slip into the inner hole of the support member when moving upward.

[0007] Preferably, the present invention also includes other technical features, wherein the upper portion of the stud is a step structure, the step structure of the stud and the second printed circuit board are clearance-fitted, and the stud and the base plate are fixed together by riveting or welding.

[0008] Preferably, the present invention also includes other technical features, wherein the support member and the inner hole of the step screw adopt a clearance fit to ensure that the step screw can move up and down in the inner hole of the support member.

[0009] Preferably, the present invention also includes other technical features, wherein a flange cover is provided at one end of the nut of the step screw, and the flange cover is used to increase the contact area between the nut and the first printed circuit board.

[0010] Preferably, the present invention also includes other technical features, wherein the retaining ring is made of elastic material.

[0011] Preferably, the utility model also includes other technical features, wherein the lower end of the inner hole of the support member is chamfered, and when the step screw drives the retaining ring to move upward, the retaining ring is tangent to the chamfered surface. Since the chamfered surface has an inclination, the retaining ring will be subjected to an annular inward force to prevent the retaining ring from falling off the step screw.

[0012] Preferably, the present invention also includes other technical features, wherein the upper portion of the support member is a step structure for matching the opening of the first printed circuit board.

[0013] Preferably, the present invention also includes other technical features, wherein before the first board-to-board connector and the second board-to-board connector are fastened together, the threaded section of the step screw can engage with the stud.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. This solution has a simple design and does not require additional structural parts, such as extraction aids. It also achieves the function of fixing the printed circuit board, thereby saving the space of the printed circuit board and the cost of structural parts.

[0016] 2. The board-to-board connector is fastened together using the locking force generated by threaded fastening. This allows the connector to be fastened more securely and is more reliable than manual pressing.

[0017] 3. The board-to-board connector is disengaged by loosening the threads. During this process, the connector is evenly stressed, the operation is simple, and the reliability is good.

[0018] 4. The stepped screw and the printed circuit board 1 are locked into one piece through the retaining ring and the support member, which reduces the number of parts required for assembly and improves the efficiency of assembly and disassembly.

[0019] 5. This solution has high reliability. Even if the retaining ring accidentally slips off, it will fall into the opening of the printed circuit board 2 and will not cause any impact on the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 , is a front cross-sectional view of the first printed circuit board and the support member;

[0021] Figure 2 , is a three-dimensional diagram of a step screw;

[0022] Figure 3 , is the front view of the step screw;

[0023] Figure 4 , is a front cross-sectional view of the step screw, the support member and the first printed circuit board;

[0024] Figure 5 , is a front sectional view of the support member;

[0025] Figure 6 , is a partial enlarged cross-sectional view of the step screw, the support member, the retaining ring and the first printed circuit board;

[0026] Figure 7 , is an exploded view of the utility model;

[0027] Figure 8 , is a front cross-sectional view of the base, studs and the second printed circuit board;

[0028] Figure 9 , is a schematic diagram of the downward movement of the step screw of the utility model;

[0029] Figure 10 , is a schematic diagram of the upward movement of the step screw of the utility model;

[0030] Figure 11 , is a cross-sectional view of the utility model;

[0031] In the figure: 1 first printed circuit board, 1-1 first board-to-board connector, 2 second printed circuit board, 2-1 second board-to-board connector, 3 bottom plate, 4 stud, 5 step screw, 5-1 groove, 5-2 retaining ring, 5-3 step structure, 5-4 threaded segment, 5-5 flange cover, 6 support member, 6-1 chamfer, 6-2 support member step structure. DETAILED DESCRIPTION

[0032] In order to make the purpose, principle and structure of the present invention more clear, it is further described below with reference to the accompanying drawings and specific embodiments.

[0033] See also Figures 1-11 The utility model provides a high-density board-to-board connector engaging and disengaging mechanism, comprising:

[0034] A first printed circuit board 1 and a first board-to-board connector 1 - 1 provided at a lower end of the first printed circuit board 1 .

[0035] A second printed circuit board 2 and a second board-to-board connector 2 - 1 provided on an upper end of the second printed circuit board 2 .

[0036] The interfaces of the first board-to-board connector 1 - 1 and the second board-to-board connector 2 - 1 are aligned, openings are provided at corresponding positions on the first printed circuit board 1 and the second printed circuit board 2 , and a gap exists between the two circuit boards.

[0037] The bottom plate 3 is provided with an opening, in which a stud 4 is provided. The stud 4 is fixed to the bottom plate 3 by riveting or welding.

[0038] The upper end of the stud 4 is provided with a step structure, the upper step structure of the step structure is clamped in the opening of the second printed circuit board 2, and the lower step of the step structure supports the second printed circuit board 2.

[0039] A support member 6 is provided at the lower end of the opening of the first printed circuit board 1. The support member 6 is a hollow cylindrical structure. A support step structure 6-2 is provided at the upper end of the support member 6, and an inner chamfer 6-1 is provided at the inner hole of the lower end of the support member 6. The upper step of the support step structure 6-2 is fixed within the opening of the first printed circuit board 1, while the lower step surface provides support for the first printed circuit board 1. The chamfer 6-1 is an inner chamfer that is concave from the outside to the inside. It is worth noting that the outer diameter of the lower end surface of the support member 6 is larger than the inner diameter of the opening of the second printed circuit board 2. The distance from the lower step surface of the support step structure 6-2 to the lower end surface of the support member 6 represents the minimum gap between the first printed circuit board 1 and the second printed circuit board 2. When the two circuit boards move to the minimum gap, the first board-to-board connector 1-1 and the second board-to-board connector 2-1 are connected without excessive collision or extrusion, thus preventing extrusion damage between the connector interfaces.

[0040] A stepped screw 5 is positioned within the support member 6. The stepped screw 5 sequentially passes through the opening of the first printed circuit board 1, the inner hole of the support member 6, the opening of the second printed circuit board 2, and the inner hole of the stud 4. A flange cover 5-5 is provided at the upper end of the stepped screw 5. The outer diameter of the flange cover 5-5 is larger than the inner diameter of the opening of the first printed circuit board 1, thereby securing the extended upper end of the stepped screw 5 with the opening of the first printed circuit board 1. A groove 5-1 is provided in the middle section of the stepped screw 5. A retaining ring 5-2 is positioned within the groove 5-1. The retaining ring 5-2 is partially retained within the groove 5-1 and partially protrudes from the stepped screw 5. The outer diameter of the protruding portion of the retaining ring 5-2 is larger than the upper diameter of the stepped screw 5 and the inner hole of the support member 6. The retaining ring 5-2 can be made of an elastic material. A threaded section 5-4 is provided at the lower end of the stepped screw 5, which engages with the stud 4.

[0041] The specific working principle is as follows:

[0042] During installation, see Figure 6 First, insert the step screw 5 into the opening of the first printed circuit board 1, pass the step screw 5 through the support 6, and then clamp the retaining ring 5-2 into the groove 5-1. At this time, since the outer diameter of the flange cover 5-5 of the step screw 5 is larger than the opening diameter of the first printed circuit board 1, and the outer diameter of the retaining ring 5-2 is larger than the inner hole diameter of the support 6, the step screw 5 can be movably mounted on the first printed circuit board 1 and form a limit with a certain movable space.

[0043] Then, see Figure 7 Align the openings of the first printed circuit board 1 and the second printed circuit board 2 and stack them. The lower portion of the step screw 5 passes through the opening of the second printed circuit board 2, and its threaded section 5-4 is threadedly engaged with the stud 4.

[0044] When engaging the connector: See Figure 9 The dotted arrow indicates the direction of movement of the step screw 5 (this is a schematic diagram of the direction of movement and does not represent a specific static state at a specific moment). When the step screw 5 is tightened, the step screw 5 gradually moves toward the stud 4 under the action of thread engagement. The support member 6, due to the limit stop of the retaining ring 5-2, can move downward along with the movement of the step screw 5. The first printed circuit board 1 supported on the support member 6 also moves downward until the first board-to-board connector 1-1 and the second board-to-board connector 2-1 come into slight contact. Subsequently, the rated torque or rated thread feed of the step screw 5 is applied to ensure that the connectors with greater resistance during fastening can fully fasten and achieve a conductive connection. This force or thread feed can be transmitted through the pressure of the flange cover 5-5 on the first printed circuit board 1 and the tensile reaction force of the stud 4 and the threaded section 5-4, thereby acting on the first board-to-board connector 1-1 and the second board-to-board connector 2-1, bringing them close together and fastening them tightly.

[0045] When disconnecting the connector: See Figure 10The dotted arrow indicates the direction of movement of the step screw 5. When the step screw 5 is loosened, the step screw 5 gradually moves away from the stud 4 under the action of the thread. At this time, the step screw 5 continues to rise in the support member 6, and the retaining ring 5-5 on the step screw 5 also continues to rise. After rising to a certain position, the retaining ring 5-5 will get stuck in the inner hole of the chamfer 6-1 of the support member. Because the outer diameter of the retaining ring 5-5 is larger than the inner hole diameter of the support member 6, and the retaining ring 5-5 is tangent to the inclined surface of the chamfer 6-1, the retaining ring 5-5 will be subjected to a circular inward force under the action of the inclined surface of the chamfer 6-1, preventing the retaining ring 5-5 from falling out of the groove 5-1 of the step screw 5. The upward lifting force of the step screw 5 is transmitted to the support member 6 through the retaining ring 5-5, and then to the first printed circuit board 1. In addition, there is a downward reaction force between the bottom stud 4, the threaded section 5-4 and the second printed circuit board 2. Under the action of the upward lifting force and the downward reaction force, the large static friction force generated by the fastening between the first printed circuit board 1 and the second printed circuit board 2 can be broken, thereby releasing the fastening force between the two circuit boards and realizing the separation of the first printed circuit board 1 and the second printed circuit board 2.

[0046] It is worth noting that the threaded segment 5-4 and the stud 4 are matched through threads, and the threaded matching can change the amount of wire feed to provide a stable, precise, and large force, which can provide force while achieving displacement, which is something that technical personnel in this field should know.

[0047] The above description is only a specific implementation method of this utility model, but the protection scope of this utility model is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by this utility model, can make equivalent substitutions or changes based on the technical solutions and new concepts of this utility model, which should be covered by the protection scope of this utility model.

Claims

1. A high-density board-to-board connector engaging and disengaging mechanism, comprising a first printed circuit board and a first board-to-board connector mating with the first printed circuit board, a second printed circuit board and a second board-to-board connector mating with the second printed circuit board, and a base plate, characterized in that: The second printed circuit board is placed on the bottom plate, a hole is opened on the second printed circuit board, and a stud is placed in the hole; Also includes step screws and supports, The middle of the step screw is provided with a groove for arranging a retaining ring, and a step structure is provided below the groove, and the bottom of the step structure is a threaded section. The support member is provided with an inner hole, and the bottom periphery of the inner hole is provided with a chamfer. The support member is arranged below the first printed circuit board and the inner hole is aligned with the opening on the first printed circuit board. The step screw is inserted into the inner hole of the support. After the retaining ring is installed on the step screw, the outer diameter of the retaining ring is smaller than the outer diameter of the chamfer at the lower end of the inner hole of the support and larger than the diameter of the inner hole of the support, which is used to ensure that the step screw will not slip into the inner hole of the support when moving upward.

2. A high-density board-to-board connector engaging and disengaging mechanism as claimed in claim 1, characterized in that: The upper portion of the stud is a step structure, the step structure of the stud and the second printed circuit board are clearance-fitted, and the stud and the base plate are fixed together by riveting or welding.

3. The high-density board-to-board connector engaging and disengaging mechanism according to claim 1, wherein: The support member and the inner hole of the step screw are clearance-matched to ensure that the step screw can move up and down in the inner hole of the support member.

4. A high-density board-to-board connector engaging and disengaging mechanism as claimed in claim 1, characterized in that: A flange cover is provided at one end of the nut of the step screw, and the flange cover is used to increase the contact area between the nut and the first printed circuit board.

5. The high-density board-to-board connector engaging and disengaging mechanism according to claim 1, wherein: The retaining ring is made of elastic material.

6. A high-density board-to-board connector engaging and disengaging mechanism as claimed in claim 1, characterized in that: The lower end of the inner hole of the support member is chamfered. When the step screw drives the retaining ring to move upward, the retaining ring is tangent to the chamfered surface. Since the chamfered surface has an inclination, the retaining ring will be subjected to an annular inward force to prevent the retaining ring from falling off the step screw.

7. A high-density board-to-board connector engaging and disengaging mechanism as claimed in claim 1, characterized in that: The upper portion of the support member is a step structure, which is used to match the opening of the first printed circuit board.

8. The high-density board-to-board connector engaging and disengaging mechanism according to claim 1, wherein: Before the first board-to-board connector and the second board-to-board connector are fastened together, the threaded section of the step screw can be engaged with the stud.

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