TWI813356B - Card edge connector - Google Patents

Abstract

The present invention disclosed a card edge connector comprising a shielding shell on the outer surface of the card edge connector, and it is in contact with the ground, which can prevent the loss of the signal and the signal interference to the product from the outside, and achieve the effect of signal shielding. The present invention disclosed a card edge connector comprising a circuit board. An insulating body on the circuit board. The insulating body is provided with a longitudinally extending card slot. The insulating body is provided with a lower row of terminals and an upper row of terminals, and the lower row of terminals and the upper row of terminals are located in the slot of the insulating body to form a contact connection part up and down. The insulating body is provided with a casing, the casing is snapped on the insulating body, and a grounding terminal is arranged in the insulating body. The iron shell of the card edge connector of the invention contains a plurality of elastic pieces, which are in contact with the tail elastic arms of the corresponding grounding terminals, so that the grounding function can be realized, the iron shell does not need to be welded to the PCB board, the cost of the PCB is reduced, and the available space of the PCB is increased.

Description

card edge connector

The invention relates to the field of electrical connectors, and relates to a card edge connector, specifically a card edge connector with a shielding function.

The existing card edge connector is disposed on the upper surface of a circuit board and is used for inserting an electronic card to achieve electrical connection between the circuit board and the electronic card. The card edge connector is generally provided on a circuit board, and can be plugged into one end of a memory card (or memory card) to achieve electrical connection between the memory card and the circuit board.

Conventional card edge connectors do not have an iron shell on the outer surface, so they have no shielding function and are easily interfered by external signals; there are also shielded iron shells that contain several iron shell solder pins that need to be welded to the PCB board to achieve the grounding function, and the PCB needs to be opened separately. Soldering pin holes or pads require additional space, which is not conducive to product standardization.

The purpose of the present invention is to overcome the shortcomings of the prior art and provide a card edge connector that contains a shielding shell (iron shell) on the outer surface and is in contact with the ground, which can prevent the loss of signals and external signal interference to the product, and achieve signal Shielding effect.

In order to achieve the above purpose, the present invention provides a card edge connector that adopts the following technical solutions:

A card edge connector includes a circuit board. The circuit board is provided with an insulating body (an insulating body with a longitudinal card slot that can accommodate a memory card). The insulating body is provided with a longitudinally extending card slot for storing a memory card (electronic card). card) is inserted and matched. The insulating body is provided with a lower row of terminals and an upper row of terminals. The lower row of terminals and the upper row of terminals are located above and below the card slot of the insulating body to form a contact connection part; the insulating body is provided with a shell, and the shell is buckled on The insulating body is provided with a grounding terminal; the housing is provided with a bending spring piece facing the insulating body, and the bending spring piece is connected to the grounding terminal in the insulating body; the housing is provided with a gap, and the gap is provided at the bottom away from the open end. There is a bending elastic piece extending towards the insulating body; the bending elastic piece is integrated with the housing by stamping and bending a metal sheet; the bending elastic piece includes a bending piece that is bent at (approximately perpendicular to) the shell surface of the case. Bend part, one end of the bent part away from the housing is provided with a reverse bending angle, and the other end of the reverse bending angle is provided with an extension part that is folded in half and extends in the opposite direction. The bending part, the extension part, and the reverse bending angle form an elastic connector. Bending shrapnel.

Further, in one embodiment, the ground terminal in the insulating body is composed of part of the upper row of terminals. The upper row of terminals is provided with a welding end at one end close to the circuit board, and the welding end is welded and fixed to the ground pad of the circuit board. On the upper row of terminals, one end away from the welding end is provided with a contact end. The contact end is suspended in the insulating body. There is a tail spring arm facing the housing between the welding end and the contact end.

Further, in one embodiment, the tail elastic arm (horseshoe ring) is an elastic socket of a C-shaped ring, and the bending elastic piece is provided in the tail elastic arm of the upper row of terminals, and the bending elastic piece is grounded through the welding end.

Further, 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 connection (fixing). ) a memory card.

Further, in one embodiment, guide grooves are provided on the sides of both ends of the housing, and guides matching the guide grooves are provided on the end sides of the insulating body, and the guide grooves are used to match the end sides of the insulating body. The guide parts on the machine are docked, and the guide parts are stuck in the guide grooves.

Further, in one embodiment, a jack is provided on the circuit board, and a plug corresponding to the jack is provided on a side of the insulating body close to the circuit board; a positioning hole is provided on the housing, and an insertion post is provided on the insulating body. The positioning holes match the corresponding positioning posts; one side of the memory card is provided with a plug end, which can be inserted into the card slot of the insulating body. There are grooves on both sides of the memory card, and the grooves are connected to the insulation through buckles. A solid connection (positioning) is formed between the bodies.

Further, in one embodiment, the sides of both ends of the housing are provided with card slots, and the end sides of the insulating body are provided with clamping blocks corresponding to the card slots, and the card slots are engaged with the clamping blocks on the end sides of the insulating body. , the card block is embedded in the card slot.

Further, in one embodiment, a limiting notch is provided at the bottom end of the housing, and a limiting protrusion matching the limiting notch is provided on a side of the insulating body close to the housing, and the limiting notch is connected to the insulation. The limit bumps on the end faces of the body are engaged, and the limit bumps are stuck in the limit notches.

The invention is applied to card edge connectors and is applied to notebooks or Pads. The iron shell of the card edge connector of the present invention contains several elastic pieces and is in contact with the tail elastic arm of the corresponding ground terminal, which can 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 arising from iron case welding PCB, and is also conducive to product standardization.

In order to further understand the characteristics, 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 of the present invention is obtained through the following detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments.

The invention includes a circuit board 11. The circuit board 11 is provided with an insulating body 21 that can be butted and matched with the card edge (an insulating body with a longitudinal card slot that can accommodate a memory card). The insulating body 21 is provided with a longitudinally extending card slot. For the memory card 12 (electronic card) to be inserted and matched, 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 part, the insulating body 21 is provided with a shell 31 , and the shell 31 is buckled on the insulating body 21 .

Further, in one embodiment, the circuit board 11 is provided with a jack 13, the side of the insulating body 21 close to the circuit board 11 is provided with plug posts 23 matching the jack 13, and the housing 31 is provided with a positioning hole 33. The insulating body 21 is provided with an insertion positioning hole 33 to match the corresponding positioning post 24. The positioning post 24 is matched with the positioning hole 33 for positioning between the insulating body 21 and the shell 31. The shell 31 is provided with an insulating The bending elastic piece 32 of the body 21 is used to connect with the ground terminal in the insulating body 21 .

One side of the memory card 12 is provided with a plug-in terminal 17, which can be inserted into the card slot of the insulating body 21. The two sides of the memory card 12 are provided with grooves 14, and the grooves 14 are used to pass the buckles 41 A stable connection (positioning) is formed with the insulating body 21 .

A slot 22 is provided at the end of the insulating body 21, and 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.

Guide grooves 34 are provided on the sides of both ends of the housing 31. Guide pieces 25 matching the guide grooves 34 are provided on the end sides of the insulating body 21. The guide grooves 34 are used to match the guide grooves 34 on the end sides of the insulating body 21. The guide 25 is butt-jointed and is clamped in the guide groove 34 for positioning the housing 31 and the insulating body 21 .

Furthermore, in one embodiment, buckle grooves 35 are provided on the sides of both ends of the housing 31 , and buckle blocks 26 matching the buckle grooves 35 are provided on the sides of the end of the insulating body 21 . The buckle grooves 35 are used to engage with the insulating body. The clamping block 26 on the side of the end of 21 is engaged, and the clamping block 26 is embedded in the clamping groove 35 for positioning the housing 31 and the insulating body 21 .

The bottom end of the housing 31 is provided with a limiting notch 36. The side of the insulating body 21 close to the housing 31 is provided with a limiting protrusion 27 matching the limiting notch 36. The limiting notch 36 is used to engage with the insulating body. The limiting protrusions 27 on the end face of 21 are engaged, and the limiting protrusions 27 are clamped in the limiting notches 36 to further limit the housing 31 and the insulating body 21 .

The housing 31 is provided with a notch 56, and the bottom of the notch 56 away from the open end is provided with a bending elastic piece 32 extending toward the insulating body 21; further, in one embodiment, the bending elastic piece 32 is connected to the housing 31 by The metal sheet is stamped and bent into one piece; the bending elastic piece 32 includes a bending portion 37 that is bent (approximately perpendicular) to the shell surface of the housing 31, and the end of the bending portion 37 away from the housing 31 is provided with a reverse bend. The other end of the bending corner 39 and the reverse bending corner 39 is provided with an extension part 38 that is folded in half and extends in a reverse direction. The bending part 37, the extension part 38 and the reverse bending angle 39 form a bending elastic piece 32 of the elastic connector.

The insulating body 21 is provided with a grounding terminal. In one embodiment, the grounding terminal in the insulating body 21 is composed of part of the upper row of terminals 16 (for execution). The upper row of terminals 16 is provided with a welding terminal at one end close to the circuit board 11 Terminal 52, the welding terminal 52 is welded and fixed on the grounding pad of the circuit board 11. The end of the upper row of terminals 16 away from the welding terminal 52 is provided with a contact terminal 53. The contact terminal 53 is suspended in the insulating body 21, and the welding terminal 52 is connected to the grounding pad of the circuit board 11. A tail spring arm 51 (horseshoe ring) is provided between the contact ends 53 toward the housing 31. In this embodiment, the tail spring arm 51 (horseshoe ring) is an elastic socket of a C-ring, and the bent spring piece 32 is disposed against In the tail elastic arm 51 of the upper row of terminals 16, the bent elastic piece 32 is connected to the ground through the welding end 52, further keeping the housing 31 grounded.

The outer surface of the card edge connector of the present invention contains a shielding iron shell and is in contact with the ground, which can prevent the loss of signals and external signal interference on the product, and achieve the signal shielding effect.

The iron shell of the card edge connector of the present invention contains several elastic pieces and is in contact with the tail elastic arm of the corresponding ground terminal, which can 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 arising from iron case welding PCB, and is also conducive to product standardization.

The above embodiments only express several preferred embodiments of the present invention, and their descriptions are 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 can be made within the scope of the inventive concept described herein, through the above teachings or technology or knowledge in related fields, and should not be construed as limiting the scope of the invention. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and the modifications and changes made by those skilled in the art do not depart from the spirit and spirit of the present invention. scope, these all belong to the protection scope of the appended claims of the present invention. Therefore, the scope of protection of the patent of the present invention shall be subject to the appended claims.

11:Circuit board 12:Memory card 13:Jack 14: Groove 15: Lower row of terminals 16: Upper row terminals 17: Connector 21: Insulating body 22:Slot 23: Insertion post 24: Positioning column 25: Guide parts 26: card block 27:Limiting bump 31: Shell 32:Bending shrapnel 33: Positioning hole 34:Guide slot 35:Buckle slot 36:Limit notch 37: Bending part 38:Extension 39:Reverse bending angle 41: buckle 51:Tail elastic arm 52:Welding end 53:Contact end 56: Gap

Figure 1 shows a schematic diagram of an embodiment of the present invention; Figure 2 shows an exploded schematic diagram of an embodiment of the present invention; Figure 3 shows a perspective view of an embodiment of the present invention; Figure 4 shows a schematic structural diagram of an embodiment of the present invention; Figure 5 shows a schematic diagram of the positioning hole part according to the embodiment of the present invention; Figure 6 shows a schematic diagram of the bending elastic piece part according to the embodiment of the present invention; Figure 7 shows a schematic diagram of the housing part of the embodiment of the present invention; Figure 8 shows a schematic diagram of the bending elastic piece part according to the embodiment of the present invention; Figure 9 shows a schematic diagram of the insulating body part of the embodiment of the present invention; Figure 10 shows a schematic diagram of the housing part of the embodiment of the present invention; and Figure 11 is a schematic cross-sectional view of an embodiment of the present invention.

16: Upper row terminals

31: Shell

32:Bending shrapnel

37: Bending part

38:Extension

39:Reverse bending angle

51:Tail elastic arm

52:Welding end

53:Contact end

Claims (7)

A card edge connector includes: a circuit board (11), the circuit board (11) is provided with an insulating body (21), the insulating body (21) is provided with a longitudinally extending card slot, the insulating body (21) 21) is provided with a lower row of terminals (15) and an upper row of terminals (16). 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. part; a shell (31) is provided on the insulating body (21), the shell (31) is buckled on the insulating body (21), and a grounding terminal is provided in the insulating body (21); the shell (31) is provided with a bending elastic piece (32) facing the insulating body (21), and the bending elastic piece (32) is connected to the ground terminal in the insulating body (21); the housing (31) A notch (56) is provided, and the bottom of the notch (56) away from the open end is provided with the bending elastic piece (32) extending toward the insulating body (21); and the bending elastic piece (32) is on the housing (31) The top and the casing (31) are integrally formed by stamping and bending metal sheets; the bending spring piece (32) includes a bending portion (37) bent on the surface of the casing (31). One end of the bent portion (37) away from the housing (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) that is folded in half and extends in the opposite direction. The bending portion (37), the extension portion (38) and the reverse bending angle (39) form the bending elastic piece (32) of the elastic connector; wherein the grounding terminal in the insulating body (21) is composed of a part thereof The upper row of terminals (16) is composed of a welding end (52) on one end close to the circuit board (11), and the welding end (52) is welded and fixed on the circuit board (11). On the grounding pad, a contact end (53) is provided on an end of the upper row terminal (16) away from the welding end (52), and the contact end (53) is set in the air. In the insulating body (21), a tail elastic arm (51) facing the housing (31) is provided between the welding end (52) and the contact end (53). A card edge connector as claimed in claim 1, wherein the tail elastic arm (51) is an elastic socket of a C-ring, and the bending elastic piece (32) resists the tail portion provided on the upper row of terminals (16) In the elastic arm (51), the bent elastic piece (32) is grounded through the welding end (52). A card edge connector as claimed in claim 1, wherein a slot (22) is provided at an end of the insulating body (21), and the card edge connector further includes a buckle (41), and the buckle (41) One end is inserted into the slot (22), and the other end of the buckle (41) is away from the insulating body (21) for connecting a memory card (12). A card edge connector as claimed in claim 1, wherein the housing (31) has a guide groove (34) on the side at both ends, and the end of the insulating body (21) is provided with a guide groove (34) on the side. ) matches a corresponding guide piece (25). The guide groove (34) is used to dock with the guide piece (25) on the end side of the insulating body (21). The guide piece (25) snaps into place. Located in the guide groove (34). A card edge connector as claimed in claim 3, wherein a jack hole (13) is provided on the circuit board (11), and a side of the insulating body (21) close to the circuit board (11) is provided with the jack hole. (13) Match a corresponding inserting post (23); the housing (31) is provided with a positioning hole (33), and the insulating body (21) is provided with a corresponding positioning post inserted into the positioning hole (33). (24); The memory card (12) is provided with a connector end (17) on one side, and the connector end (17) can be inserted into the card slot of the insulating body (21). The memory card (12) There is a groove (14) on both sides of the insulator, and the groove (14) is firmly connected to the insulating body (21) through the buckle (41). A card edge connector as claimed in claim 1, wherein a card slot (35) is provided on the sides of both ends of the housing (31), and the end side of the insulating body (21) is provided with a card slot (35). The slot (35) matches a corresponding clamping block (26). The slot (35) is clamped with the clamping block (26) on the end side of the insulating body (21). The clamping block (26) is embedded in in the card slot (35). A card edge connector as claimed in claim 1, wherein a limiting notch (36) is provided at the bottom end of the housing (31), and a side of the insulating body (21) close to the housing (31) is provided with a limiting notch (36). There is a limit bump (27) corresponding to the limit notch (36), and the limit notch (36) engages with the limit bump (27) on the end surface of the insulating body (21). , the limiting bump (27) is clamped in the limiting notch (36).