Card edge connector

Abstract

The application discloses a card edge connector, which contains a shielding shell on the outer surface of the card edge connector and is in contact with the ground, so that signal loss and external signal interference on the product are prevented, and the effect of signal shielding is achieved. The card edge connector comprises a circuit board, an insulating body arranged on the circuit board, a card slot extending longitudinally arranged on the insulating body, a lower row of terminals and an upper row of terminals arranged on the insulating body, and a contact connection part formed by the lower row of terminals and the upper row of terminals arranged on the card slot of the insulating body. A shell is arranged on the insulating body, the shell is buckled on the insulating body, and a grounding terminal is arranged in the insulating body. The iron shell of the card edge connector contains a plurality of elastic sheets and is in contact with the tail elastic arms of corresponding grounding terminals, so that the grounding function is achieved. The iron shell does not need to be welded to the PCB, the cost of the PCB is reduced, and the available space of the PCB is increased.

Description

Technical Field

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

[0002] Conventional card edge connectors are used on the top surface of a circuit board to accommodate an electronic card, thereby electrically connecting the circuit board and the electronic card. Card edge connectors are typically located on a circuit board and accept one end of a memory card for electrical connection.

[0003] Conventional card edge connectors do not have an iron shell on the outer surface, so they have no shielding function and are easily interfered with by external signals. Some shielded iron shells contain several iron shell solder pins, which need to be soldered to the PCB board to achieve grounding function. At the same time, the PCB needs to have additional solder pin holes or pads, which requires additional reserved space and is not conducive to product standardization. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a card edge connector having a shielding shell (iron shell) on the outer surface thereof and in contact with the ground, which can prevent signal loss and external interference with the signal of the product, thereby achieving the effect of signal shielding.

[0005] To achieve the above objectives, the present invention provides a card edge connector that adopts the following technical solutions:

[0006] A card edge connector includes a circuit board, an insulating body (an insulating body having a longitudinal card slot for receiving a memory card) provided on the circuit board, a longitudinally extending card slot provided on the insulating body for receiving a memory card (electronic card), a lower row of terminals and an upper row of terminals provided on the insulating body, the lower and upper rows of terminals being located above and below the card slot of the insulating body to form a contact connection portion; a housing provided on the insulating body, the housing being snapped onto the insulating body, and a ground terminal provided in the insulating body;

[0007] The shell is provided with a bent spring piece facing the insulating body, and the bent spring piece is connected to the ground terminal in the insulating body;

[0008] A notch is provided on the shell, and a bent spring sheet extending toward the insulating body is provided at the bottom of the notch away from the open end;

[0009] The bent spring piece is stamped and bent into one piece with the shell by metal sheet; the bent spring piece includes a bent portion bent at (approximately perpendicular to) the shell surface of the shell, and a reverse bending angle is provided at one end of the bent portion away from the shell, and an extension portion folded in half and extended in the opposite direction is provided at the other end of the reverse bending angle. The bent portion, the extension portion and the reverse bending angle constitute the bent spring piece of the elastic connector.

[0010] Furthermore, in one embodiment, the grounding terminal in the insulating body is composed of part of the upper row of terminals, a welding end is provided on the end of the upper row of terminals close to the circuit board, and the welding end is welded and fixed on the grounding pad of the circuit board, and a contact end is provided on the end of the upper row of terminals away from the welding end, and the contact end is suspended in the insulating body, and a tail spring arm facing the shell is provided between the welding end and the contact end.

[0011] Furthermore, in one embodiment, the tail spring arm (horseshoe ring) is an elastic connector of a C-shaped ring, and the bent spring piece is disposed in contact with the tail spring arm of the upper row of terminals, and the bent spring piece is grounded through a welding end.

[0012] Furthermore, in one embodiment, a slot is provided at the end of the insulating body, and the card edge connector further includes a buckle, one end of the buckle is inserted into the slot, and the other end of the buckle is away from the insulating body for connecting (fixing) a memory card.

[0013] Furthermore, in one embodiment, guide grooves are provided on the sides of both ends of the shell, and guide pieces corresponding to the guide grooves are provided on the sides of the end portions of the insulating body. The guide grooves are used to dock with the guide pieces on the sides of the end portions of the insulating body, and the guide pieces are clamped in the guide grooves.

[0014] Furthermore, in one embodiment, a socket is provided on the circuit board, and a plug pin is provided on a side of the insulating body close to the circuit board to match the socket;

[0015] The shell is provided with a positioning hole, and the insulating body is provided with a positioning post inserted into the positioning hole and matched with the corresponding positioning post;

[0016] One side of the memory card is provided with a connector, which can be inserted into the card slot of the insulating body. Both sides of the memory card are provided with grooves, which form a stable connection (positioning) between the grooves and the insulating body through the buckle.

[0017] Furthermore, in one embodiment, a card slot is provided on the side surfaces at both ends of the shell, and a card block corresponding to the card slot is provided on the side surface of the end portion of the insulating body. The card slot is engaged with the card block on the side surface of the end portion of the insulating body, and the card block is embedded in the card slot.

[0018] Furthermore, in one embodiment, a limiting slot is provided at the bottom end of the shell, and a limiting protrusion corresponding to the limiting slot is provided on one side of the insulating body close to the shell. The limiting slot is engaged with the limiting protrusion on the end face of the insulating body, and the limiting protrusion is locked in the limiting slot.

[0019] The present invention is applied to a card edge connector, suitable for use on notebooks or tablets. The metal shell of the card edge connector contains several springs that contact the tail spring arms of corresponding grounding terminals, achieving a grounding function. The metal shell does not need to be soldered to the PCB, reducing PCB costs and increasing available PCB space. It also reduces various risks associated with soldering the metal shell to the PCB and facilitates product standardization. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Shown is a schematic diagram of an embodiment of the present invention;

[0021] Figure 2 Shown is an exploded schematic diagram of an embodiment of the present invention;

[0022] Figure 3 Shown is a perspective view of an embodiment of the present invention;

[0023] Figure 4 Shown is a schematic structural diagram of an embodiment of the present invention;

[0024] Figure 5 Shown is a schematic diagram of a positioning hole portion of an embodiment of the present invention;

[0025] Figure 6 FIG2 is a schematic diagram of a bent spring sheet according to an embodiment of the present invention;

[0026] Figure 7 Shown is a schematic diagram of a housing portion of an embodiment of the present invention;

[0027] Figure 8 FIG2 is a schematic diagram of the bent spring portion of an embodiment of the present invention;

[0028] Figure 9 FIG2 is a schematic diagram of an insulating body portion according to an embodiment of the present invention;

[0029] Figure 10 Shown is a schematic diagram of a housing portion of an embodiment of the present invention;

[0030] Figure 11 Shown is a schematic cross-sectional view of an embodiment of the present invention.

[0031] Explanation of the main parts symbols in the figure:

[0032] Circuit board 11, memory card 12, jack 13, groove 14, lower row of terminals 15, upper row of terminals 16, plug end 17, insulating body 21, slot 22, plug post 23, positioning post 24, guide 25, block 26, limiting protrusion 27, shell 31, bent spring piece 32, positioning hole 33, guide groove 34, snap groove 35, limiting notch 36, bent portion 37, extension portion 38, reverse bending angle 39, snap 41, tail spring arm 51, welding end 52, contact end 53, notch 56. DETAILED DESCRIPTION

[0033] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, and to analyze the advantages and spirit of the present invention, a further understanding is obtained through the following detailed description of the present invention in combination with the accompanying drawings and specific embodiments.

[0034] The present invention includes a circuit board 11, which is provided with an insulating body 21 (an insulating body having a longitudinal card slot for accommodating a memory card) that can be docked with a card edge. The insulating body 21 is provided with a longitudinally extending card slot for inserting and mating with a memory card 12 (electronic card). The insulating body 21 is provided with a lower row of terminals 15 and an upper row of terminals 16 (grounding terminals). The lower row of terminals 15 and the upper row of terminals 16 are located above and below the card slot of the insulating body 21 to form a contact connection portion. The insulating body 21 is provided with a shell 31, which is snapped onto the insulating body 21.

[0035] Furthermore, in one embodiment, a socket 13 is provided on the circuit board 11, and a plug post 23 corresponding to the socket 13 is provided on a side of the insulating body 21 close to the circuit board 11. A positioning hole 33 is provided on the shell 31, and a positioning post 24 corresponding to the insertion positioning hole 33 is provided on the insulating body 21. The positioning post 24 is matched with the positioning hole 33 and plugged into the positioning hole 33 to position the insulating body 21 and the shell 31. The shell 31 is provided with a bent spring piece 32 facing the insulating body 21, and the bent spring piece 32 is used to connect to the ground terminal in the insulating body 21.

[0036] One side of the memory card 12 is provided with a connector 17 which can be inserted into the card slot of the insulating body 21 . Both sides of the memory card 12 are provided with grooves 14 which are used to form a stable connection (positioning) between the memory card 12 and the insulating body 21 through the buckle 41 .

[0037] A slot 22 is defined at the end of the insulating body 21 . The card edge connector further includes a buckle 41 . One end of the buckle 41 is inserted into the slot 22 , and the other end of the buckle 41 is away from the insulating body 21 for connecting (fixing) the memory card 12 .

[0038] Guide grooves 34 are provided on the side surfaces at both ends of the shell 31, and guide members 25 corresponding to the guide grooves 34 are provided on the side surfaces of the end portions of the insulating body 21. The guide grooves 34 are used to dock with the guide members 25 on the side surfaces of the end portions of the insulating body 21, and the guide members 25 are clamped in the guide grooves 34 for positioning the shell 31 and the insulating body 21.

[0039] Furthermore, in one embodiment, snap grooves 35 are provided on the sides at both ends of the shell 31, and a clamping block 26 corresponding to the snap groove 35 is provided on the side of the end of the insulating body 21. The snap groove 35 is used to clamp with the clamping block 26 on the side of the end of the insulating body 21, and the clamping block 26 is embedded in the snap groove 35 to position the shell 31 and the insulating body 21.

[0040] A limiting slot 36 is provided at the bottom end of the shell 31, and a limiting protrusion 27 corresponding to the limiting slot 36 is provided on one side of the insulating body 21 close to the shell 31. The limiting slot 36 is used to engage with the limiting protrusion 27 on the end face of the insulating body 21. The limiting protrusion 27 is clamped in the limiting slot 36 to further limit the shell 31 and the insulating body 21.

[0041] A notch 56 is provided on the shell 31, and a bent spring piece 32 extending toward the insulating body 21 is provided at the bottom of the notch 56 away from the open end; further, in one embodiment, the bent spring piece 32 is stamped and bent integrally with the shell 31 by a metal sheet; the bent spring piece 32 includes a bent portion 37 bent to (approximately perpendicular to) the shell surface of the shell 31, and the end of the bent portion 37 away from the shell 31 is provided with a reverse bending angle 39, and the other end of the reverse bending angle 39 is provided with an extension portion 38 folded in half and extending in the opposite direction, and the bent portion 37, the extension portion 38, and the reverse bending angle 39 constitute the bent spring piece 32 of the elastic connector.

[0042] A grounding terminal is provided in the insulating body 21. In one embodiment, the grounding terminal in the insulating body 21 is composed of (implemented by) a portion of the upper row of terminals 16 therein. A welding end 52 is provided on the end of the upper row of terminals 16 close to the circuit board 11. The welding end 52 is welded and fixed on the grounding pad of the circuit board 11. A contact end 53 is provided on the end of the upper row of terminals 16 away from the welding end 52. The contact end 53 is suspended in the insulating body 21. A tail elastic arm 51 (horseshoe ring) facing the shell 31 is provided between the welding end 52 and the contact end 53. In this embodiment, the tail elastic arm 51 (horseshoe ring) is an elastic connector of a C-shaped ring. The bent spring piece 32 is abutted in the tail elastic arm 51 of the upper row of terminals 16. The bent spring piece 32 is grounded through the welding end 52, further keeping the shell 31 grounded.

[0043] The outer surface of the card edge connector of the present invention comprises a shielding iron shell which is in contact with the ground, thereby preventing signal loss and external interference with the product signal, thereby achieving a signal shielding effect.

[0044] The iron shell of the card edge connector of the present invention contains a plurality of spring pieces, which contact with the tail spring arms of the corresponding grounding terminals to realize the grounding function. The iron shell does not need to be welded to the PCB board, which reduces the cost of the PCB and increases the available space of the PCB. At the same time, it can also reduce various risks that may occur when welding the iron shell to the PCB, and is also conducive to product standardization.

[0045] The above embodiments only express several preferred embodiments of the present invention, and the description thereof is relatively specific and detailed. It should be understood that the present invention is not limited to the forms disclosed herein and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge in the relevant fields, and cannot be understood as limiting the scope of the invention. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention. The changes and modifications made by those in this field do not depart from the spirit and scope of the present invention, and all of these belong to the scope of protection of the claims attached to the present invention. Therefore, the scope of protection of the patent of the present invention should be based on the attached claims.

Claims

1. A card edge connector, comprising: A circuit board (11), wherein an insulating body (21) is provided on the circuit board (11), a longitudinally extending slot is provided on the insulating body (21), a lower row of terminals (15) and an upper row of terminals (16) are provided on the insulating body (21), and the lower row of terminals (15) and the upper row of terminals (16) are located above and below the slot of the insulating body (21) to form a contact connection portion; characterized in that a shell (31) is provided on the insulating body (21), the shell (31) is snap-fitted onto the insulating body (21), and a grounding terminal is provided in the insulating body (21); The shell (31) is provided with a bent spring piece (32) facing the insulating body (21), and the bent spring piece (32) is connected to the ground terminal in the insulating body (21); A notch (56) is provided on the shell (31), and a bottom portion of the notch (56) away from the open end is provided with the bent spring piece (32) extending toward the insulating body (21); The bent spring piece (32) is formed integrally with the shell (31) by stamping and bending a metal sheet; the bent spring piece (32) includes a bent portion (37) bent on the shell surface of the shell (31); an end of the bent portion (37) away from the shell (31) is provided with a reverse bending angle (39); the other end of the reverse bending angle (39) is provided with an extension portion (38) folded in half and extending in the reverse direction; the bent portion (37), the extension portion (38), and the reverse bending angle (39) constitute the bent spring piece (32) of the elastic connector; The grounding terminal in the insulating body (21) is composed of a portion of the upper row of terminals (16), and the upper row of terminals (16) is provided with a tail elastic arm (51) facing the housing (31); The tail elastic arm (51) is an elastic connector of a C-shaped ring, and the bent elastic sheet (32) is disposed in contact with the tail elastic arm (51) of the upper row terminal (16).

2. The card edge connector according to claim 1, wherein: A welding end (52) is provided on one end of the upper row of terminals (16) close to the circuit board (11), and the welding end (52) is welded and fixed on the ground pad of the circuit board (11). A contact end (53) is provided on one end of the upper row of terminals (16) away from the welding end (52), and the contact end (53) is suspended in the insulating body (21). A tail spring arm (51) facing the shell (31) is provided between the welding end (52) and the contact end (53), and the bent spring piece (32) is grounded through the welding end (52).

3. The card edge connector according to claim 1, wherein: A slot (22) is provided at the end of the insulating body (21), and the card edge connector further comprises a buckle (41), one end of the buckle (41) is inserted into the slot (22), and the other end of the buckle (41) is away from the insulating body (21) and is used for connecting a memory card (12).

4. The card edge connector according to claim 1, wherein: Guide grooves (34) are provided on the side surfaces of both ends of the shell (31), and guide pieces (25) matching the guide grooves (34) are provided on the side surfaces of the end portions of the insulating body (21). The guide grooves (34) are used to dock with the guide pieces (25) on the side surfaces of the end portions of the insulating body (21), and the guide pieces (25) are clamped in the guide grooves (34).

5. The card edge connector according to claim 3, wherein: The circuit board (11) is provided with a socket (13), and a side of the insulating body (21) close to the circuit board (11) is provided with a plug post (23) that matches the socket (13); The housing (31) is provided with a positioning hole (33), and the insulating body (21) is provided with a positioning column (24) inserted into the positioning hole (33) and matched with the corresponding positioning column; One side of the memory card (12) is provided with a connector end (17), and the connector end (17) can be inserted into the card slot of the insulating body (21). Both sides of the memory card (12) are provided with grooves (14), and the grooves (14) form a stable connection with the insulating body (21) through the buckle (41).

6. The card edge connector according to claim 1, wherein: The side surfaces of both ends of the shell (31) are provided with card slots (35), and the side surfaces of the end portions of the insulating body (21) are provided with card blocks (26) that match the card slots (35). The card slots (35) are engaged with the card blocks (26) on the side surfaces of the end portions of the insulating body (21), and the card blocks (26) are embedded in the card slots (35).

7. The card edge connector according to claim 1, wherein: A limiting notch (36) is provided at the bottom end of the shell (31), and a limiting protrusion (27) matching the limiting notch (36) is provided on one side of the insulating body (21) close to the shell (31). The limiting notch (36) is engaged with the limiting protrusion (27) on the end face of the insulating body (21), and the limiting protrusion (27) is clamped in the limiting notch (36).

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