Card Edge Connectors

Abstract

The present invention discloses a card edge connector, comprising a longitudinal insulating body, wherein the top surface of the insulating body is recessed with a central slot along the longitudinal direction, and the two sides of the central slot in the width direction have receiving holes, and a conductive terminal is arranged in the receiving hole, and the receiving hole penetrates the top and bottom surfaces of the insulating body and the inner wall of the side walls on both sides in the width direction of the central slot, and the receiving hole has two opposite side walls 1 perpendicular to the central slot and a side wall 2 parallel to the central slot and away from the central slot, the upper part of the side wall 2 is expanded outward to form a clearance groove 1, and the bottoms of the two sides in the width direction of the insulating body are recessed inward to form a clearance groove 2, and the height of the receiving hole from the top surface to the bottom surface of the insulating body is defined as H, and the distance between the top wall of the clearance groove 2 and the bottom wall of the clearance groove 1 is defined as J, and J=H / 2±0.1H. The card edge connector of the present invention can improve the flatness of the connector, enhance the anti-warping ability of the connector, and reduce welding defects.

Description

Technical Field

[0001] The present invention relates to the field of connectors, and in particular to a card edge connector. Background Art

[0002] In recent years, data centers have developed rapidly, and the requirements for server performance have become increasingly higher. For DDR connectors, one of the core components of servers, the traditional wave soldering packaging method has been unable to meet the performance requirements, so future development is moving towards surface mount packaging (SMT). The SMT process has very high requirements for the flatness and warpage resistance of the connector. The general allowable deformation value is within 0.10mm, otherwise there will be defects such as floating height, cold solder joints, and empty solder joints during welding. Generally, DDR connectors are more than 140mm in length, and it is very difficult to control the flatness within 0.10mm. Therefore, a card edge connector needs to be designed to improve the aforementioned defects. Summary of the invention

[0003] The object of the present invention is to provide a card edge connector, which can improve the flatness of the connector, enhance the anti-warping ability of the connector, and reduce welding defects.

[0004] To achieve the above-mentioned purpose, the present invention provides a card edge connector, including a longitudinal insulating body, the top surface of the insulating body is recessed along the longitudinal direction to form a central slot, and there are receiving holes on both sides of the width direction of the central slot, and a conductive terminal is arranged in the receiving hole. The receiving hole passes through the top and bottom surfaces of the insulating body and the inner walls of the side walls on both sides of the width direction of the central slot. The receiving hole has two opposite side walls 1 perpendicular to the central slot and a side wall 2 parallel to the central slot and away from the central slot. The upper part of the side wall 2 expands outward to form a clearance groove 1, and the bottoms of both sides of the width direction of the insulating body are recessed inward to form clearance grooves 2. The height of the receiving hole from the top surface to the bottom surface of the insulating body is defined as H, and the distance between the top wall of the clearance groove 2 and the bottom wall of the clearance groove 1 is defined as J, J=H / 2±0.1H.

[0005] As a further improvement of the present invention, the distance between the bottom wall of the first clearance groove and the bottom of the insulating body is defined as D, and the distance between the bottom wall of the first clearance groove and the top wall of the insulating body is defined as A, and D≧2A.

[0006] As a further improvement of the present invention, the bottom wall of the first clearance groove is higher than the horizontal center line along the width direction of the insulating body, the distance from the top wall of the second clearance groove to the bottom surface of the insulating body is defined as E, and the distance from the bottom wall of the central slot to the bottom surface of the insulating body is defined as G, E≦G.

[0007] As a further improvement of the present invention, the distance between the side wall three of the first clearance groove parallel to and away from the central slot and the outer wall surface in the longitudinal direction of the insulating body is defined as B, and the distance between the inner side wall of the second clearance groove and the side wall two of the receiving hole is defined as F, and B and F are basically equal.

[0008] As a further improvement of the present invention, the width of the central slot is defined as K, the distance between the second side wall of the receiving hole and the outer wall surface of the insulating body in the longitudinal direction is defined as L, and K and L are substantially equal.

[0009] As a further improvement of the present invention, the bottom wall of the first clearance groove protrudes upward to form a boss or is recessed downward to form a groove.

[0010] As a further improvement of the present invention, the middle portion of the second side wall of the receiving hole or the third side wall of the first accommodating groove is expanded outward to form a stepped side wall.

[0011] As a further improvement of the present invention, two tower portions are respectively protruding from both ends of the insulating body, and each of the two tower portions is respectively pivotally mounted with an ear buckle; at least one anti-misplacement protrusion is provided in the central slot to prevent the card from being inserted in the wrong direction; the metal terminal is a surface mount packaging type or a dual in-line packaging type.

[0012] As a further improvement of the present invention, two tower portions are protruding from both ends of the insulating body, one of which is pivotally mounted with an ear buckle, and the other is fixed with a cap and a metal spring; at least one anti-mock protrusion for preventing incorrect insertion of the card is provided in the central slot; the metal terminal is a surface mount package type or a dual in-line package type.

[0013] As a further improvement of the present invention, two tower portions are protruding from both ends of the insulating body, and each of the two tower portions is pivotally mounted with an ear buckle, or one of the tower portions is pivotally mounted with an ear buckle and the other tower portion is fixed with a cap and a metal spring; at least one anti-mock protrusion for preventing incorrect insertion of the card is provided in the central slot; the outer side of the insulating body is covered with a metal shell, and the metal terminals are surface mount packaging type or dual in-line packaging type.

[0014] Compared with the prior art, the card edge connector of the present invention has the following beneficial effects:

[0015] (1) By designing J=H / 2±0.1H, the flatness of the card edge connector can be improved, the anti-warping ability of the card edge connector can be enhanced, and welding defects can be reduced.

[0016] (2) Through the design that D≧2A, E≦G, B and F are basically equal, and K and L are basically equal, the flatness of the card edge connector is further improved, the anti-warping ability of the card edge connector is enhanced, and welding defects are reduced, so that the main body flatness and anti-warping ability of the card edge connector reach the optimal state.

[0017] The present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, which are used to illustrate embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 1 is a three-dimensional schematic diagram of a first embodiment of a card edge connector.

[0019] Figure 2 for Figure 1 sectional view of .

[0020] Figure 3 It is a three-dimensional schematic diagram of the second embodiment of the card edge connector.

[0021] Figure 4 It is a three-dimensional schematic diagram of the third embodiment of the card edge connector.

[0022] Figure 5 It is a three-dimensional schematic diagram of a fourth embodiment of a card edge connector.

[0023] Figure 6 for Figure 5 sectional view of .

[0024] Description of the accompanying drawings: insulating body 1, central slot 11, anti-mistake protrusion 111, receiving hole 12, side wall one 121, side wall two 122, make way groove one 13, bottom wall 131, side wall three 132, make way groove two 14, tower part 15, boss 16, conductive terminal 2, ear buckle 3, cover cap 4, metal shell 5, metal spring 6. DETAILED DESCRIPTION

[0025] Embodiments of the present invention will now be described with reference to the accompanying drawings, wherein like reference numerals represent like elements throughout the several views.

[0026] Embodiment 1

[0027] Please refer to Figure 1-2The card edge connector includes a longitudinal insulating body 1, the top surface of the insulating body 1 is recessed with a central slot 11 along the longitudinal direction, and at least one anti-misplacement protrusion 111 is arranged in the central slot 11 to prevent the card from being inserted in the wrong direction. There are receiving holes 12 on both sides of the width direction of the central slot 11, and a conductive terminal 2 is installed at each receiving hole 12. The receiving holes 12 pass through the top and bottom surfaces of the insulating body 1 and the inner wall surfaces of the side walls on both sides of the width direction of the central slot 11. The receiving hole 12 has two opposite side walls 121 perpendicular to the central slot 11 and a side wall 122 parallel to the central slot 11 and away from the central slot 11. The upper part of the side wall 122 expands outward to form a clearance groove 13. The bottoms of both sides in the width direction of the insulating body 1 are inwardly recessed to form a clearance groove 2 14. The height of the receiving hole 12 from the top surface to the bottom surface of the insulating body 1 is defined as H, and the distance between the top wall of the clearance groove 2 14 and the bottom wall of the clearance groove 1 13 is defined as J, J = H / 2 ± 0.1H. The design of the clearance groove 2 14 is to facilitate the use of the automatic machine design track.

[0028] The distance between the bottom wall 131 of the first clearance groove 13 and the bottom of the insulating body 1 is defined as D, and the distance between the bottom wall 131 of the first clearance groove 13 and the top wall of the insulating body 1 is defined as A, and D≧2A.

[0029] The bottom wall 131 of the first clearance groove 13 is higher than the horizontal center line along the width direction of the insulating body 1, the distance from the top wall of the second clearance groove 14 to the bottom surface of the insulating body 1 is defined as E, and the distance from the bottom wall of the central slot 11 to the bottom surface of the insulating body 1 is defined as G, E≦G.

[0030] The distance between the side wall 3 132 of the first clearance groove 13 parallel to the central slot 11 and away from the central slot 11 and the outer wall surface of the longitudinal direction of the insulating body 1 is defined as B, and the distance between the inner side wall of the second clearance groove 14 and the side wall 2 122 of the receiving hole 12 is defined as F, B and F are substantially equal, and the difference between B and F does not exceed 0.20 mm. The outer wall surface of the longitudinal direction of the insulating body 1 is the outer wall surface of the side walls on both sides of the width direction of the central slot 11.

[0031] The width of the central slot 11 is defined as K, and the distance between the second side wall 122 of the receiving hole 12 and the outer wall surface of the insulating body 1 in the longitudinal direction is defined as L. K and L are substantially equal, and the difference between K and L does not exceed 0.20 mm.

[0032] Two towers 15 are protruded from both ends of the insulating body 1, and each of the two towers 15 is pivotally mounted with an ear button 3. The conductive terminal 2 is a surface mount package (SMT) or a dual in-line package (DIP).

[0033] Embodiment 2

[0034] Please refer to Figure 3The difference between this embodiment and the first embodiment is that two tower portions 15 are protruded from both ends of the insulating body 1, one of the tower portions 15 is pivotally mounted with an ear buckle 3, and the other tower portion 15 is fixed with a cap 4 and a metal spring 6, and the conductive terminal 2 is a surface mount package (SMT) or a dual in-line package (DIP).

[0035] Embodiment 3

[0036] Please refer to Figure 4 The difference between this embodiment and the first embodiment is that two tower portions 15 are protruded from both ends of the insulating body 1, and each of the two tower portions 15 is pivotally mounted with an ear button 3, or one of the tower portions 15 is pivotally mounted with an ear button 3, and the other tower portion 15 is fixed with a cap 4 and a metal spring 6, the outer surface of the insulating body 1 is covered with a metal shell 5, and the conductive terminal 2 is a surface mount package (SMT) or a dual in-line package (DIP).

[0037] Embodiment 4

[0038] Please refer to Figure 5-6 The difference between this embodiment and the first embodiment is that the bottom wall 131 of the first clearance groove 13 protrudes upward to form a boss 16. The middle part of the second side wall 122 of the receiving hole 12 is expanded outward to form a stepped side wall. The third side wall 132 of the first clearance groove 13 can also be expanded outward to form a stepped side wall.

[0039] The card edge connector of the present invention may also have other embodiments. In other embodiments, the bottom wall 131 of the first clearance groove 13 is depressed downward to form a groove, and the middle of the second side wall 122 of the receiving hole 12 or the third side wall 132 of the first clearance groove 13 is expanded outward to form a stepped side wall.

[0040] The present invention has been described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A card edge connector, comprising a longitudinal insulating body, wherein the top surface of the insulating body is recessed along the longitudinal direction to form a central slot, and the two sides of the central slot in the width direction are provided with receiving holes, and a conductive terminal is arranged in the receiving hole, and the receiving hole passes through the top and bottom surfaces of the insulating body and the inner walls of the side walls on both sides in the width direction of the central slot, and the receiving hole has two opposite side walls 1 perpendicular to the central slot and a side wall 2 parallel to the central slot and away from the central slot, the upper part of the side wall 2 is expanded outward to form a clearance groove 1, and the bottoms of the two sides in the width direction of the insulating body are recessed inward to form a clearance groove 2, characterized in that: The height of the receiving hole from the top surface to the bottom surface of the insulating body is defined as H, and the distance between the top wall of the second clearance groove and the bottom wall of the first clearance groove is defined as J, J=H / 2±0.1H; The distance between the bottom wall of the first clearance groove and the bottom of the insulating body is defined as D, and the distance between the bottom wall of the first clearance groove and the top wall of the insulating body is defined as A, D≧2A; The bottom wall of the first clearance groove is higher than the horizontal center line along the width direction of the insulating body. The distance from the top wall of the second clearance groove to the bottom surface of the insulating body is defined as E, and the distance from the bottom wall of the central slot to the bottom surface of the insulating body is defined as G, E≦G.

2. The card edge connector according to claim 1, wherein: The distance between the side wall 3 of the first clearance groove parallel to and away from the central slot and the outer wall surface in the longitudinal direction of the insulating body is defined as B, and the distance between the inner side wall of the second clearance groove and the side wall 2 of the receiving hole is defined as F, and B and F are basically equal.

3. The card edge connector according to claim 2, wherein: The width of the central slot is defined as K, the distance between the second side wall of the receiving hole and the outer wall surface of the insulating body in the longitudinal direction is defined as L, and K and L are substantially equal.

4. The card edge connector according to claim 3, wherein: The bottom wall of the first clearance groove protrudes upward to form a boss or is recessed downward to form a groove.

5. The card edge connector according to claim 4, wherein: The middle part of the side wall 2 of the receiving hole or the side wall 3 of the first giving way groove is expanded outward to form a stepped side wall.

6. The card edge connector according to any one of claims 1 to 5, characterized in that: Two towers are protruded from both ends of the insulating body, and each tower is pivotally mounted with an ear buckle; at least one anti-mock protrusion for preventing the card from being inserted in the wrong direction is arranged in the central slot; the metal terminal is a surface mount package type or a dual in-line package type.

7. The card edge connector according to any one of claims 1 to 5, characterized in that: Two tower parts are protruding from both ends of the insulating body, one of which is pivotally mounted with an ear buckle, and the other is fixed with a cap and a metal spring; at least one anti-mock protrusion for preventing the card from being inserted in the wrong direction is arranged in the central slot; the metal terminal is a surface mount package type or a dual in-line package type.

8. The card edge connector according to any one of claims 1 to 5, characterized in that: Two tower parts are protruding from both ends of the insulating body, and both tower parts are pivotally installed with an ear buckle, or one of the tower parts is pivotally installed with an ear buckle and the other tower part is fixed with a cap and a metal spring; at least one anti-mock protrusion for preventing the card from being inserted in the wrong direction is arranged in the central slot; the outer side of the insulating body is covered with a metal shell, and the metal terminal is a surface mount packaging type or a dual in-line packaging type.

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