Nut positioning structure of connector backboard

Through bonding or laser welding of the counterhead through holes of the back plate, the problem of easy breakage and complex processing of the riveted nut is solved, and high-strength and low-cost connection effect is achieved.

CN223079381UActive Publication Date: 2025-07-08KUNSHAN HONGZE ELECTRONICS
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Patent Information

Application Number
CN202421112193.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-21
Publication Date
2025-07-08
Estimated Expiration
2034-05-21

AI Technical Summary

Technical Problem

In the prior art, the riveted nuts on the back plate are prone to breakage, have low connection strength, are complex in processing, high in cost, and are prone to fall off.

Method used

The T-shaped columnar connecting nut composed of limiting columns and limiting baffles is fixed with the counterhead through holes of the back plate through bonding or laser welding, and combined with the positioning columns of interference fit, a stable connection between the connecting nut and the back plate is achieved.

Benefits of technology

Improves connection strength, avoids breakage of limit baffles, reduces production costs, and ensures that the connection nuts are not easy to fall off.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a connector backboard nut positioning structure, which comprises a backboard and a connecting nut, the backboard is provided with a countersunk head through hole, the connecting nut comprises a limiting column and a limiting baffle plate, the limiting column and the limiting baffle plate are coaxially and fixedly connected to form a T-shaped columnar structure, the inner side of the T-shaped columnar structure is provided with a threaded hole, and the limiting baffle plate is fixedly connected with the limiting column. The connecting nut is inserted into the countersunk through hole of the back plate, the limiting baffle of the connecting nut is contained in a countersunk head of the countersunk through hole, the limiting baffle of the connecting nut is stopped on the bottom face of the countersunk head of the countersunk through hole, and the limiting column of the connecting nut extends out of the outer side of the back plate by a set distance through the countersunk through hole. The limiting baffle of the connecting nut and the countersunk head of the countersunk head through hole in the back plate are fixed and positioned through bonding or laser welding, extrusion riveting of the limiting baffle and the countersunk head of the back plate is avoided, breakage of the limiting baffle is avoided, the connecting strength of the connecting nut is guaranteed, and the service life of the connecting nut is prolonged. And meanwhile, the connecting nut and the back plate are prevented from being badly fixed and positioned.
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Description

Technical Field

[0001] The utility model relates to a connector backplane, in particular to a nut positioning structure of a connector backplane. Background Art

[0002] In electronic products, two or more circuit boards can be spliced or stacked for electrical connection to expand functions. When multiple circuit boards are spliced, or when multiple circuit boards are stacked and electrically connected through a thin and light compression adapter plate connector, a backplane made of insulating material is required for splicing multiple circuit boards. For example, it is lapped on the surface of multiple spliced circuit boards, or pressed on the surface of multiple stacked circuit boards, and then screws pass through the reserved holes on the multiple circuit boards and are threadedly connected and fixed to the riveted nuts 3 on the backplane.

[0003] Currently, the riveted nut on the backplane is fixed and positioned on the backplane by riveting. One end of the riveted nut forms a riveting piece 31 with an enlarged outer diameter, and a crimping tooth 311 is formed on the outer side of the riveting piece. The riveted nut penetrates into the positioning hole 12 of the backplane, and the crimping teeth on the riveting piece are extruded into the positioning hole of the backplane, causing the joint between the positioning hole and the crimping teeth to deform, thereby restricting the axial freedom of the riveted nut. Since the thickness of the riveting piece on the riveted nut is relatively thin, during riveting, the crimping teeth on the riveting piece are forced to interfere with the positioning hole of the backplane, and the crimping teeth are easily broken during the extrusion process, resulting in functional failure.

[0004] Moreover, for the structure of fixing the riveted nut by this kind of riveting method, the positioning hole structure on the backplane is relatively complex. The diameter of one end of the riveting section is the largest, the diameter of the middle section is the smallest, and the diameter of the other end is between the middle section and the riveting section diameter. An avoidance ring with a reduced outer diameter also needs to be formed at the root of the riveted nut close to the riveting piece. The processing technology of the backplane positioning hole and the riveted nut with this kind of structure is complex, the preparation cost is high, the connection strength is low, and it is easy to fall off. Summary of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a nut positioning structure of a connector backplane, which has high connection strength and the connection nut is not easy to fall off after long-term use.

[0006] The technical solution adopted by the present utility model to solve its technical problems is as follows: A positioning structure for a connector backplane nut, comprising a backplane and a connecting nut. A countersunk through-hole is provided on the backplane. The connecting nut includes a limiting post and a limiting baffle. The limiting post and the limiting baffle are coaxially fixedly connected to form a T-shaped columnar structure. A threaded hole is formed inside the T-shaped columnar structure. The connecting nut is inserted into the countersunk through-hole of the backplane. The limiting baffle of the connecting nut is received in the countersink of the countersunk through-hole, and the limiting baffle of the connecting nut abuts against the bottom surface of the countersink of the countersunk through-hole. The limiting post of the connecting nut extends out of the backplane by a set distance through the countersunk through-hole. The limiting baffle of the connecting nut and the countersink of the countersunk through-hole on the backplane are fixedly positioned by bonding or laser welding.

[0007] As a further improvement of the present utility model, the countersink of the countersunk through-hole and the limiting baffle of the connecting nut are non-circular structures with matching outer shapes. The limiting baffle of the connecting nut is circumferentially stopped and received in the countersink of the countersunk through-hole.

[0008] As a further improvement of the present utility model, the cross-section of the countersink of the countersunk through-hole and the limiting baffle of the connecting nut is a hexagonal structure, a triangular structure, a square structure or a rhombic structure.

[0009] As a further improvement of the present utility model, a radially outwardly expanding positioning post is further provided on the circumferential outer side wall of the root where the limiting post is connected to the limiting baffle. The positioning post is inserted into the through-hole of the countersunk through-hole by interference fit.

[0010] As a further improvement of the present utility model, the height of the positioning post is less than or equal to the length of the through-hole of the countersunk through-hole, and the thickness of the limiting baffle is less than or equal to the depth of the countersink of the countersunk through-hole.

[0011] As a further improvement of the present utility model, a plurality of laser welding points are evenly spaced on the limiting baffle.

[0012] As a further improvement of the present utility model, the limiting post and the positioning post of the connecting nut are both cylindrical structures, and chamfer structures are provided on the outer sides of the ends of the limiting post and the positioning post facing away from the limiting baffle.

[0013] As a further improvement of the present utility model, at least two countersunk through-holes are evenly spaced along the length direction of the backplane, and at least two connecting nuts are correspondingly installed in each countersunk through-hole.

[0014] As a further improvement of the present utility model, the centers of the countersunk through-holes on the backplane are located on the center line in the width direction of the backplane.

[0015] The beneficial technical effects of the present utility model are as follows: The present utility model realizes the fixed positioning of the connecting nut and the counterbore through hole of the back plate by laser welding or bonding, and the non-circular circumferential outer side surface of the limiting baffle of the connecting nut is used to limit the counterbore inner wall of the counterbore through hole, thereby improving the axial force-bearing strength of the connecting nut, enabling the connecting nut to withstand greater torque. Moreover, the present application further provides axial tension and torque through the interference fit between the positioning post and the through hole of the counterbore through hole, so that the connecting nut and the counterbore through hole of the back plate are firmly positioned. The present application avoids the extrusion riveting of the limiting baffle and the counterbore of the back plate. When the connecting nut is fixedly connected to the counterbore through hole of the back plate, the limiting baffle and the counterbore of the counterbore through hole are in clearance fit, and there is no need for forced extrusion interference between the two, avoiding the fracture of the limiting baffle, ensuring the connection strength of the connecting nut, and at the same time avoiding defects during the fixed positioning of the connecting nut and the back plate, resulting in the scrapping of raw materials, and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an exploded view of the assembly structure of the back plate and the connecting nut in the prior art;

[0017] Figure 2 is the first three-dimensional view of the assembly structure of the back plate and the connecting nut in the prior art;

[0018] Figure 3 is the second three-dimensional view of the assembly structure of the back plate and the connecting nut in the prior art;

[0019] Figure 4 is the front view of the assembly structure of the back plate and the connecting nut in the prior art;

[0020] Figure 5 is Figure 4 the enlarged view of part B in

[0021] Figure 6 is Figure 4 the sectional view taken along the A-A direction before riveting of the back plate and the connecting nut in

[0022] Figure 7 is Figure 6 the enlarged view of part C in

[0023] Figure 8 is Figure 4 the sectional view taken along the A-A direction after riveting of the back plate and the connecting nut in

[0024] Figure 9 is Figure 8 the enlarged view of part D in

[0025] Figure 10 is the first three-dimensional view of the connecting nut in the prior art;

[0026] Figure 11 is the second three-dimensional view of the connecting nut in the prior art;

[0027] Figure 12 This is an exploded view of the assembly structure of the back panel and the connecting nut of the present utility model;

[0028] Figure 13 This is the first three-dimensional view of the assembly structure of the back panel and the connecting nut of the present utility model;

[0029] Figure 14 This is the second three-dimensional view of the assembly structure of the back panel and the connecting nut of the present utility model;

[0030] Figure 15 This is the three-dimensional view of the state where the connecting nut of the present utility model is inserted into the counterbore through hole of the back panel;

[0031] Figure 16 This is the front view of the state where the connecting nut of the present utility model is inserted into the counterbore through hole of the back panel;

[0032] Figure 17 It is Figure 16 The sectional view taken along the E-E direction in

[0033] Figure 18 It is Figure 17 The enlarged view of part F in

[0034] Figure 19 This is the three-dimensional view of the completed state of welding the connecting nut and the counterbore through hole of the present utility model;

[0035] Figure 20 This is the front view of the completed state of welding the connecting nut and the counterbore through hole of the present utility model;

[0036] Figure 21 It is Figure 20 The enlarged view of part G in

[0037] Figure 22 This is the first three-dimensional view of the connecting nut of the present utility model;

[0038] Figure 23 This is the second three-dimensional view of the connecting nut of the present utility model. Detailed implementation manners

[0039] Embodiment: A nut positioning structure for a connector backplane 1, comprising a backplane 1 and a connecting nut 2. A countersunk through-hole 11 is provided on the backplane 1. The connecting nut 2 includes a limiting post 21 and a limiting baffle 22. The limiting post 21 and the limiting baffle 22 are coaxially and fixedly connected to form a T-shaped columnar structure. A threaded hole 24 is formed inside the T-shaped columnar structure. The connecting nut 2 is inserted into the countersunk through-hole 11 of the backplane 1. The limiting baffle 22 of the connecting nut 2 is received in the countersink of the countersunk through-hole 11, and the limiting baffle 22 of the connecting nut 2 abuts against the bottom surface of the countersink of the countersunk through-hole 11. The limiting post 21 of the connecting nut 2 extends outside the backplane 1 through the countersunk through-hole 11 by a set distance. The limiting baffle 22 of the connecting nut 2 and the countersink of the countersunk through-hole 11 on the backplane 1 are fixedly positioned by bonding or laser welding.

[0040] During assembly, the connecting nut 2 is inserted into the countersunk through-hole 11 on the backplane 1. The limiting baffle 22 of the connecting nut 2 is blocked in the countersink of the countersunk through-hole 11. The limiting post 21 of the connecting nut 2 extends through the countersunk through-hole 11 to the outside of the backplane 1 for plugging and positioning with the hole position on the circuit board. The limiting baffle 22 of the connecting nut 2 and the countersink of the countersunk through-hole 11 on the backplane 1 are fixedly positioned by bonding or laser welding, avoiding riveting and extrusion of the thinner part of the connecting nut 2 with the countersunk through-hole 11, and avoiding fracture and damage of the thinner part of the connecting nut 2.

[0041] The countersink of the countersunk through-hole 11 and the limiting baffle 22 of the connecting nut 2 are non-circular structures with matching outer shapes. The limiting baffle 22 of the connecting nut 2 is circumferentially stopped and received in the countersink of the countersunk through-hole 11.

[0042] After the limiting baffle 22 of the connecting nut 2 is inserted into the countersink of the countersunk through-hole 11, the outer side wall of the limiting baffle 22 of the connecting nut 2 and the inner side wall of the countersink of the countersunk through-hole 11 are blocked and limited in the circumferential direction to bear the torque of the connecting nut 2 in the countersunk through-hole 11. The circumferential torsion of the connecting nut 2 will not affect the bonding or welding connection strength between the connecting nut 2 and the countersink of the countersunk through-hole 11, improving the fixing stability of the connecting nut 2 in the countersunk through-hole and preventing it from falling off during long-term use.

[0043] The cross-section of the countersink of the countersunk through-hole 11 and the limiting baffle 22 of the connecting nut 2 is a hexagonal structure, a triangular structure, a square structure or a rhombic structure. The cross-section of the countersink of the countersunk through-hole 11 and the limiting baffle 22 of the connecting nut 2 can also be other non-circular structures, which can be selected by those skilled in the art according to actual needs and all fall within the protection scope of this application.

[0044] On the circumferential outer side wall of the root where the limit post 21 is connected to the limit baffle 22, there is also a radially expanding positioning post 23, and the positioning post 23 is inserted into the through hole of the countersunk through hole 11 by interference fit. When the connecting nut 2 is inserted into the countersunk through hole 11 of the back plate 1, the circumferential outer side wall of the positioning post 23 is in interference fit with the through hole of the countersunk through hole 11 for preliminary positioning, which is convenient for bonding or laser welding the limit baffle 22 with the countersunk of the countersunk through hole 11. Moreover, the interference fit connection between the positioning post 23 and the through hole of the countersunk through hole 11 can ensure the position accuracy of the limit post 21, and can also further improve the connection stability between the connecting screw and the countersunk through hole 11, sharing part of the torque and tensile force, which is more conducive to the stable positioning of the connecting nut 2 in the countersunk through hole 11.

[0045] The height of the positioning post 23 is less than or equal to the length of the through hole of the countersunk through hole 11, and the thickness of the limit baffle 22 is less than or equal to the depth of the countersunk of the countersunk through hole 11. This structure can ensure that the limit baffle 22 and the positioning post 23 of the connecting nut 2 do not extend outside the back plate 1, avoiding interference with other parts.

[0046] On the limit baffle 22, a number of laser welding points 221 are evenly spaced. When the cross-section of the limit baffle 22 is a polygon structure, the best position for each laser welding point is preferably directly opposite to each inner vertex angle of the polygon. This position has a larger area, which can improve the welding strength of the laser welding points.

[0047] Both the limit post 21 and the positioning post 23 of the connecting nut 2 are cylindrical structures, and chamfer structures 211 are provided on the outer sides of the ends of the limit post 21 and the positioning post 23 facing away from the limit baffle 22.

[0048] Along the length direction of the back plate 1, at least two countersunk through holes 11 are evenly spaced, and at least two connecting nuts 2 are correspondingly installed in each countersunk through hole 11. It is optimal to set three countersunk through holes on the back plate 1, which are located at both ends and the middle position in the length direction of the back plate 1 to improve the connection strength.

[0049] Each countersunk through hole 11 on the back plate 1 is located on the center line in the width direction of the back plate 1.

Claims

1. A connector backplane nut positioning structure, comprising a backplane (1) and a connecting nut (2), wherein a countersunk through hole (11) is provided on the backplane, and the connecting nut comprises a limiting post (21) and a limiting baffle (22), and is characterized in that: The limiting post is fixedly connected to the limiting baffle coaxially to form a T-shaped columnar structure. A threaded hole (24) is formed inside the T-shaped columnar structure. The connecting nut is inserted into the counterbore through hole of the backboard. The limiting baffle of the connecting nut is received in the counterbore of the counterbore through hole, and the limiting baffle of the connecting nut abuts against the bottom surface of the counterbore of the counterbore through hole. The limiting post of the connecting nut extends out of the outside of the backboard by a set distance through the counterbore through hole. The limiting baffle of the connecting nut and the counterbore of the counterbore through hole on the backboard are fixedly positioned by bonding or laser welding.

2. The connector backplane nut positioning structure according to claim 1, wherein: The counterbore of the counterbore through hole and the limiting baffle of the connecting nut are non-circular structures with matching outer shapes, and the limiting baffle of the connecting nut is received in the counterbore of the counterbore through hole in a circumferentially locked manner.

3. The connector backplane nut positioning structure according to claim 2, characterized in that: The cross-section of the counterbore of the counterbore through hole and the limiting baffle of the connecting nut is a hexagonal structure, a triangular structure, a square structure or a rhombic structure.

4. The connector backplane nut positioning structure according to claim 1, characterized in that: On the outer circumferential side wall of the root where the limiting post is connected to the limiting baffle, there is also a radially expanding positioning post (23), and the positioning post is inserted into the through hole of the counterbore through hole by interference fit.

5. The connector backplane nut positioning structure according to claim 4, characterized in that: The height of the positioning post is less than or equal to the length of the through hole of the counterbore through hole, and the thickness of the limiting baffle is less than or equal to the depth of the counterbore of the counterbore through hole.

6. The connector backplane nut positioning structure according to claim 1, characterized in that: A plurality of laser welding points (221) are evenly spaced on the limiting baffle.

7. The connector backplane nut positioning structure according to claim 1, wherein: The limiting post and the positioning post of the connecting nut are both cylindrical structures, and chamfer structures (211) are provided on the outer sides of the ends of the limiting post and the positioning post facing away from the limiting baffle.

8. The connector backplane nut positioning structure according to claim 1, characterized in that: At least two counterbore through holes are evenly spaced along the length direction of the backboard, and at least two connecting nuts are respectively installed in each counterbore through hole.

9. The connector backplane nut positioning structure according to claim 8, characterized in that: Each counterbore through hole on the backboard is located on the center line in the width direction of the backboard.