TWM463919U - Locking device, card-edge connector, card-edge connector assembly - Google Patents

Abstract

The utility model discloses a locking device for card edge connectors, which is used for locking an electronic card plugged in a card edge connector. The locking device comprises a locking arm and a welding arm, wherein the locking arm comprises a first fixed end and a joint end; and the welding arm is separately arranged independent of the locking arm, the welding arm comprises a second fixed end and a free end, the welding arm is integrally provided with a welding plate, and the locking arm and the welding arm are arranged opposite to each other. Advantageously, the welding arm is a floating locking part. The utility model also relates to a card edge connector and a card edge connector assembly. By using the technical scheme, the defect rate of the welding plate welded on a PCB (printed circuit board) can be reduced.

Description

Locking device, card edge connector and card edge connector assembly

The present invention relates to a locking device for a card edge connector, a card edge connector and a card edge connector assembly, and the present invention relates in particular to an improvement in the locking manner of the locking device.

The existing card edge connector comprises a connector body and a locking device connected at two ends of the connector body. The locking device generally comprises a fixing locking arm for fixing the card and a welding locking arm provided with the welding plate, two The locking arms are formed in one piece. However, since the connector body may warp due to temperature changes, the soldering of the bonding pad may be caused during soldering of the bonding pad to the PCB to increase the defect rate of the product.

The technical problem solved by the present invention is to provide an improved locking device for a card edge connector, which separately provides a fixing locking arm and a welding locking arm to provide a welding locking arm along the connector body as much as possible. The movement function in the height direction or the thickness direction, thereby reducing the empty welding as much as possible.

According to the present invention, a locking device for a card edge connector is provided for locking an electronic card inserted into the card edge connector, the locking device comprising: a locking arm, the locking arm comprising a first fixed end And a joint end; and a welding arm separately provided independently of the lock arm, the welding arm includes a second fixed end and a free end, the welding arm is integrally provided with a welding disc, wherein the locking arm and the locking arm The welding arms are disposed to face each other.

Advantageously, the second fixed end comprises a first strip and a second strip extending from the body of the welding arm in a longitudinal direction of the welding arm, the first strip and the second strip The extended ends of the members are spaced apart to form a narrow gap between the first strip and the second strip.

Advantageously, the engaging end is provided with an upper limit member, a lower limit member and a joint member, wherein the upper limit member and the lower limit member are used for restricting movement of the electronic card inserted in the card edge connector in the up and down direction, The engaging member is adapted to engage with the slot on the electronic card to prevent the electronic card from being detached from the card edge connector in the plugging direction.

Advantageously, the width of the elongate gap gradually increases in the direction of extension from the body of the welding arm.

Advantageously, the extended end of at least one of the segments is provided with a hook extending transversely to the longitudinal direction of the other strip. In addition, only the extended end of the first strip is provided with the hook, and the extension length of the first strip is smaller than the extension length of the second strip.

Advantageously, the body of the welding arm defines a width direction; a side of the body of the welding arm adjacent to the second fixed end is provided with a limiting protrusion extending along the width direction, the limiting protrusion and the body Between the ends of the strips, a limiting receiving portion is defined; a corresponding position of the body of the locking arm adjacent to the first fixed end is disposed transversely to the body of the locking arm toward the welding arm An extending member is adapted to fit in the limiting receptacle.

Advantageously, the locking arm is disposed adjacent the engaging end with a blocking extension extending transversely to the body of the locking arm toward the welding arm, the blocking extension supporting the free end of the welding arm. In addition, the extended end of the blocking extension is also provided with a vertical block extending vertically upward.

According to the present invention, a card edge connector is also provided, comprising: a connector body extending in a first direction and having a thickness in a second direction perpendicular to the first direction; two of the above locking Means, respectively disposed on the connector body Each of the two ends of the connector body extends in a third direction perpendicular to the first direction and the second direction, wherein the corresponding positions of the two ends of the connector body are respectively disposed for positioning a first fixing portion and a second fixing portion of the fixed end and the second fixing end, wherein a gap exists between the second fixing end and the second fixing portion in the second direction.

Advantageously, the extended end of at least one of the locking members is provided with the aforementioned hook, and correspondingly the second fixing portion comprises a blocking portion that cooperates with the hook.

In addition, the second fixing portion includes one of the first fixing chambers disposed in the third direction and a second fixing chamber that is in contact with the first fixing chamber, the hook is located in the second fixing chamber, and the An interface between the fixed chamber and the second fixed chamber forms at least one step constituting the blocking portion, and the step cooperates with the hook.

Advantageously, the card edge connector is a SODIMM card edge connector.

According to the present invention, a card edge connector assembly is also provided, comprising two card edge connectors, each card edge connector comprising: a connector body extending in a first direction and in a first direction The second direction of the vertical has a thickness, a plurality of electrical connection terminals are disposed in the connector body; and two of the locking devices respectively disposed at two ends of the connector body in the first direction.

Optionally, in the card edge connector assembly, the card edge connector assembly includes two card edge connectors, and the height of one card edge connector in the second direction is smaller than the height of the other card edge connector in the second direction. And the locking device of the other card edge connector is respectively located above the locking device of the card edge connector in the second direction; the welding pad of the card edge connector is oriented in the first direction The locking device extends with a card receiving space defined by the connector body; the other card edge connector includes a connecting portion connecting the welding pad to the welding arm, the connecting portion including the welding arm in the first direction a lateral portion extending away from the card receiving space, a vertical portion extending from the lateral portion toward the lower side in the second direction, the bonding pad being coupled to the vertical portion and extending transversely to the vertical portion away from the card receiving space .

With the technical solution of the present invention, the thickness of the soldering plate along the connector body can be made Move slightly up and down to reduce the welding defect rate caused by the warpage of the connector body during welding.

Other objects and advantages of the present invention will become apparent from the following description of the present invention with reference to the accompanying drawings.

10‧‧‧Connector body

11‧‧‧Electrical connection terminal

12‧‧‧First Fixed Department

13‧‧‧Second fixed department

20‧‧‧Locking device

30‧‧‧Locking arm

31‧‧‧First fixed end

32‧‧‧ joint end

33‧‧‧The body of the locking arm

40‧‧‧ welding arm

41‧‧‧Second fixed end

42‧‧‧Free end

43‧‧‧The body of the welding arm

44‧‧‧Bends

50‧‧‧welding plate

50'‧‧‧welding plate

51‧‧‧Connecting Department

100‧‧‧ card edge connector

100'‧‧‧ card edge connector

131‧‧‧First fixed room

132‧‧‧Second fixed room

133‧‧‧ steps

300‧‧‧plug card

302‧‧‧ slotting

321‧‧‧ upper limit

322‧‧‧lower limit

323‧‧‧Connecting parts

331‧‧‧blocking parts

332‧‧‧Blocking extension

333‧‧‧ vertical block

411‧‧‧First article

412‧‧‧Second article

413‧‧‧Length gap

414‧‧‧ hook

414a‧‧‧Block surface

414b‧‧‧Bevel

431‧‧‧Limited bulges

432‧‧‧Restricted accommodation

511‧‧‧ transverse part

512‧‧‧ vertical section

The present invention will be further described in detail with reference to the accompanying drawings, wherein: FIG. 1 is a schematic view of a card edge connector according to an embodiment of the present invention, wherein a perspective view of the card edge connector and a perspective view of the welding arm are illustrated. 3 is a schematic view of a locking device according to an embodiment of the present invention, wherein the fixing arm and the locking arm are assembled together; FIG. 3 is a schematic view showing the fixing of the fixing arm; A schematic view showing the fixing of the locking arm; FIG. 5 is a schematic view of a card edge connector according to an embodiment of the present invention, wherein the card edge connector is placed on the PCB; FIG. 6 is according to the present invention. A schematic view of a card edge connector of another embodiment of the present invention, which shows a perspective view of the card edge connector, a perspective view of the welding arm, and a perspective view of the locking arm; FIG. 7 shows a card with a plug-in card. A schematic diagram of a card edge connector according to another embodiment of the present invention, wherein the card edge connector is placed on the PCB; FIG. 8 is a perspective view of the card edge connector assembly according to an embodiment of the present invention; 9 is An enlarged view of the locking device of the two card edge connectors 8; FIG. 10 is a schematic welding of the extending direction of the arm is arranged offset parallel configuration of the adjacent bonding pads of the card edge connector.

Although the present invention will be fully described with reference to the accompanying drawings in which the preferred embodiments of the present invention are described, it is understood that those skilled in the art can modify the invention described herein while obtaining the technical effect of the present invention. Therefore, the above description is to be understood as broadly disclosed by those skilled in the art, and is not intended to limit the exemplary embodiments described herein.

It should be clearly pointed out that in this creation, the "upper side", "lower side", and "top" and "bottom end" of the spatial positional relationship of the components of the card edge connector are fixed with respect to the card edge connector. In the case of the PCB above, "upper side" and "top" indicate that the components of the card edge connector are away from the PCB and do not face one side or one end of the PCB, while the "lower side" and "bottom end" indicate the card edge. The components of the connector are close to and facing one side or one end of the PCB; "inside" means the two locking devices facing the card edge connector of the components of the card edge connector and one side of the card receiving space defined by the connector body "Outside" means that the components of the card edge connector are far apart and do not face one side of the card accommodating space. A similar understanding is made regarding the "bottom surface" and "top surface" of the spatial positional relationship of the components of the card edge connector.

The general composition of the card edge connector will be described below with reference to Figs. As shown, the card edge connector 100 includes: a connector body 10 on which a plurality of electrical connection terminals 11 are disposed, the connector body 10 extending in a first direction X and in a first direction The second direction Y of the vertical direction has a thickness; the two locking devices 20 are respectively disposed at two ends of the connector body 10 in the first direction X, and the locking device 20 is perpendicular to the first direction X and the second The third direction Z of the direction Y extends. Each locking device 20 includes a locking arm 30 and a welding arm 40. The fixing arm 40 is provided with a welding disc 50 integrally formed with the fixing arm 40. Although only one side of the lock arm 30 and the welding arm 40 are shown in Fig. 1, the lock arm and the welding arm on the other side have a similar structure.

6 shows a general composition of a card edge connector 100' in accordance with another embodiment of the present disclosure, which is substantially identical to that shown in FIGS. 1-2, except that the weldment 40' has a different configuration.

The locking device 20 connected to the connector body 10 of the card edge connector 100 according to the present invention is specifically described below with reference to FIGS. 1 through 4. The locking device 20 includes: a locking arm 30, the locking arm 30 includes a first a fixed end 31 and an engaging end 32, the engaging end can be provided with an upper limit member 321, a lower limit member 322 and a joint member 323; and a welding arm 40 is separately provided independently of the lock arm 30, the welding The arm 40 includes a second fixed end 41 and a free end 42. The welding arm is integrally provided with a welding pad 50, wherein the locking arm 30 and the welding arm 40 are disposed opposite each other. It should be noted that the position of the welding disc can be located near the free end 42, as shown in Figure 1, or on the body 43 of the welding arm mentioned below, as shown in Figure 10. Incidentally, in FIG. 10, since the positions of the welding discs of the card edge connectors arranged adjacent to each other on the welding arm are shifted in the extending direction of the welding arm, the card edges of the adjacent arrangement can be reduced side by side. The spacing between the connectors helps to reduce the space occupied by the card edge connector.

Here, the upper limit member 321 moves to the outside when the plug card 300 is pressed down based on the elasticity of the lock arm 30, and when the plug card 300 is already in place (that is, mounted on the card edge connector), the upper limit The position member 321 returns to the initial position based on the elasticity of the lock arm 30 to restrict the insertion of the card 300 upward. Here, the lower limit member 322 is used to abut the bottom surface of the plug-in card when the plug-in card 300 is in place to prevent the plug-in card from moving further downward. Here, the engaging member 323 is for engaging with the slot 302 on the plug card 300 to prevent the plug card placed between the upper limit member and the lower limit member from being detached from the card edge connector.

The welding arm 40 will be described below with reference to FIG. 1. As shown in FIG. 1, the second fixed end 41 of the welding arm 40 includes a first strip 411 and a second strip 412 extending from the body 43 of the welding arm in the longitudinal direction of the welding arm. The first strip 411 and the extended end of the second strip 412 are spaced apart to form an elongated gap 413 between the first strip 411 and the second strip 412. Advantageously, the width of the elongated gap 413 gradually increases in the direction from which the body 43 of the welding arm extends.

Advantageously, as shown in FIG. 1, the body 43 of the welding arm 40 is bent by a portion 44. Connected to the free end 42, the free end extends substantially parallel to the body of the welding arm.

Although not shown, the second fixed end 41 may include a transition piece, and the first strip and the second strip are connected to the body 43 of the welding arm 40 by the transition joint; The transition joint is provided with at least one engaging member extending transversely to the longitudinal direction, for example to prevent hooking or jamming, to prevent the welding arm 40 from being pulled out of the connector body 10.

Instead of providing the first strip 411 and the second strip 412, a strip-shaped extension having a smaller width relative to the body 43 of the welding arm 40 may be provided. Optionally, the extended end of the strip extension may be provided with the above hook.

The structure for preventing the welding arm 40 from being pulled out from the connector body 10 is not limited to being disposed on the above-described transitional connection portion, but may be disposed on any portion to be placed in the connector body 10, for example, may be disposed in the first strip On the shape and / or on the second strip.

Advantageously, the extended end of the at least one piece is provided with a hook 414 extending away from the other strip transversely to the longitudinal direction (in the drawing, along the second direction Y). As shown in FIG. 3, the hook 414 can have a vertical blocking surface 414a and a ramp 414b that facilitates entry of the hook into the connector body 10.

More advantageously, only the extended end of the first strip 411 is provided with the hook 414, and the extended length of the first strip 411 is smaller than the extended length of the second strip 412. It should be noted that the "first" and "second" are not limited to the upper and lower directions in the figure. In practical applications, the second strip 412 in the figure may also be provided with a hook 414 and a short extension length. The first strip 411 in the figure is not provided with a hook and has a long extension length.

Referring to FIG. 1 and FIG. 2, a side of the body 43 of the soldering arm 40 adjacent to the second fixed end 41 is provided with a limiting protrusion 431 extending in the width direction (ie, the second direction Y). Between the protrusion 431 and the end of the body 43 where the strip is disposed, a position accommodating portion 432 is defined; a corresponding position of the body 33 of the lock arm 30 adjacent to the first fixed end 31 is disposed. There is a blocking member 331 extending transversely to the body 33 of the locking arm 30 toward the welding arm 40. As shown in FIG. 2, the blocking member 331 is adapted to fit in the limiting receiving portion 432. Thereby, the lock arm 30 can be prevented from being pulled out from the connector body 10.

Referring to FIG. 2, the locking arm 30 is disposed adjacent to the engaging end 32 with a blocking extension 332 extending transversely to the body 33 of the locking arm 30 toward the welding arm 40. The blocking extension 332 supports the welding. The free end 42 of the arm 40. Advantageously, the extended end of the blocking extension 332 is also provided with a vertical stop 333 that extends vertically (ie, along the second direction Y). The blocking extension 332 prevents the locking arm 30 from moving upward when abutting the free end 42 of the welding arm 40, while the vertical stop 333 assists in mounting the free end 42 of the welding arm 40 in place.

This creation is also about the card edge connector. In order to place the first fixed end 31 and the second fixed end 41 in the connector body 10, it is necessary to provide a first fixing portion 12 and a second portion for fixing or accommodating the two fixed ends at the end of the connector body 10. The fixing portion 13 has a gap between the second fixing end and the second fixing portion in the second direction, see FIG. 3. Here, the slit provides a possibility for the welding arm 40 to move up and down in the second direction Y. However, those skilled in the art will appreciate that the size of the gap herein is appropriate, that is, the welding arm 40 can be moved up and down without the welding arm 40 being detached from the connector body 10.

In order to cooperate with the hook 414 on the welding arm 40 of the locking device 20, the second fixing portion 41 may include a blocking portion that cooperates with the hook 414. Specifically, referring to FIG. 3, the second fixing portion 13 includes one first fixed chamber 131 and one second fixed chamber 132 connected to the first fixed chamber in the third direction Z, and An interface between the fixed chamber and the second fixed chamber forms at least one step constituting the blocking portion, and the step cooperates with the hook 414.

As shown in FIG. 3, the first fixing portion 12 and the second fixing portion 13 are arranged side by side, and even the two can communicate in the first direction X to accommodate the distance requirement between the welding arm 40 and the locking arm 30.

FIG. 4 only shows a specific example of the first fixing portion 12, and of course, the first fixed end 31 can be designed and fixed in any known manner.

In addition, other descriptions of the locking device 20 already mentioned in this application are still suitable. Used for card edge connectors.

The card edge connector can be a SODIMM card edge connector, preferably a DDR SODIMM card edge connector.

The present invention also relates to a card edge connector assembly that includes two of the above card edge connectors. The two card edge connectors can be arranged side by side or stacked.

As shown in Figures 8 and 9, the card edge connector assembly includes two stacked card edge connectors 100, 100', the height of the card edge connector 100 in the second direction being less than the card edge connector 100' a height in the second direction, and the locking device of the card edge connector 100' is respectively located above the locking device of the card edge connector 100 in the second direction; the welding pad 50 of the card edge connector 100 is at the The card receiving space defined in the direction X toward the locking device 20 and the connector body 10 extends; the card edge connector 100' includes a connecting portion 51 for connecting the bonding pad 50' to the welding arm, the connecting portion 51 comprising a welding portion 50 in the first direction X away from the card receiving space, a vertical portion 511 extending from the lateral portion in the second direction Y toward the lower side, the welding pad 50' and the vertical The straight portion 512 is coupled and extends transversely to the vertical portion away from the card receiving space.

In the card edge connector assembly shown in Figures 8 and 9, the extended end or engagement of the locking arm 30 of the card edge connector 100' is required when the card 300 is inserted into the card edge connector 100. There is always a gap between the end 32 and the upper surface of the plug-in card 300 to ensure that the locking arm 30 of the card edge connector 100' does not interfere with the insertion of the plug-in card 300 into the card edge connector 100. In the case where the gap is secured, the distance between the connector body of the card edge connector 100 and the connector body of the card edge connector 100' can be set as small as possible in the third direction Z.

It should be noted that the card edge connector assembly shown in FIG. 8 is merely illustrative, and the card edge connector can be any other height, such as a 4.0H, 5.2H, 8.0H or 9.2H card edge connector.

In the card edge connector assembly, the locking arm 30 can be versatile between different card edge connectors, thereby reducing design costs.

Having described the preferred embodiment of the present invention in detail, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the scope and spirit of the appended claims. Embodiments of the exemplary embodiments are set forth in the description. It should be noted that the word "comprising" does not exclude other elements or steps. The word "a" or "an" does not exclude a plurality. In addition, any component numbering of the scope of the patent application should not be construed as limiting the scope of the present invention.

10‧‧‧Connector body

11‧‧‧Electrical connection terminal

20‧‧‧Locking device

30‧‧‧Locking arm

31‧‧‧First fixed end

32‧‧‧ joint end

33‧‧‧The body of the locking arm

40‧‧‧ welding arm

41‧‧‧Second fixed end

42‧‧‧Free end

43‧‧‧The body of the welding arm

44‧‧‧Bends

50‧‧‧welding plate

100‧‧‧ card edge connector

321‧‧‧ upper limit

322‧‧‧lower limit

323‧‧‧Connecting parts

331‧‧‧blocking parts

411‧‧‧First article

412‧‧‧Second article

413‧‧‧Length gap

414‧‧‧ hook

431‧‧‧Limited bulges

432‧‧‧Restricted accommodation

Claims (22)

A locking device (20) for a card edge connector for locking an electronic card inserted into the card edge connector, characterized in that the locking device comprises: a locking arm (30), The locking arm includes a first fixed end (31) and an engaging end (32) for engaging with the electronic card; and a welding arm (40) separately provided independently of the locking arm, the welding arm including a first The fixed end (41) and the free end (42) are integrally provided with a welding disc (50), wherein the locking arm and the welding arm are disposed opposite to each other. The locking device of claim 1, wherein: the second fixed end comprises a first strip (411) and a second strip extending from a body of the welding arm along a longitudinal direction of the welding arm The member (412) is spaced apart between the extended ends of the first strip and the second strip to form an elongated gap (413) between the first strip and the second strip. The locking device of claim 2, wherein: the width of the elongated gap gradually increases in a direction from the extension of the body of the welding arm. The locking device of claim 2, wherein: the extended end of the at least one piece is provided with a hook (414) extending transversely to the longitudinal direction of the other strip. The locking device of claim 4, wherein: only the extended end of the first strip is provided with the hook, and the extended length of the first strip is smaller than the extended length of the second strip. The locking device of any one of claims 2 to 5, wherein: the body of the welding arm defines a width direction; One side of the body (43) of the welding arm adjacent to the second fixed end is provided with a limiting protrusion (431) extending along the width direction, and the limiting protrusion and the body of the body are provided with the strip A limiting receiving portion (432) is defined between the ends; a position of one side of the body of the locking arm adjacent to the first fixed end is disposed at a position transverse to the body (33) of the locking arm toward the welding arm An extending member (331) is adapted to fit in the limiting receptacle. The locking device of any one of claims 2 to 5, wherein the locking arm is disposed adjacent to the engaging end with a blocking extension (332) extending transversely to the body of the locking arm toward the welding arm, the blocking An extension supports the free end of the welding arm. The locking device of claim 7, wherein: the extended end of the blocking extension is also provided with a vertical stop (333) extending vertically upward. The locking device of claim 6, wherein: the locking arm is disposed adjacent to the engaging end with a blocking extension extending transversely to the body of the locking arm toward the welding arm, the blocking extension supporting the welding arm Free end. The locking device of claim 9, wherein: the extended end of the blocking extension is also provided with a vertical block extending vertically upward. The locking device of claim 1, wherein: the engaging end is provided with an upper limit member (321), a lower limit member (322) and a joint member (323), wherein the upper limit member and the lower limit member are used for limiting The electronic card inserted in the card edge connector moves in an up and down direction, and the engaging member is configured to engage with a slot (302) on the electronic card to prevent the electronic card from being connected from the card edge in a plugging direction The device is detached. A card edge connector comprising: a connector body (10) extending in a first direction (X) and having a thickness in a second direction (Y) perpendicular to the first direction; Locking devices (20) are respectively disposed at two ends of the connector body in the first direction, and each locking device extends in a third direction (Z) perpendicular to the first direction and the second direction, It is characterized in that each locking device is a locking device according to any one of claims 1 to 3, 11; corresponding positions of the two ends of the connector body are respectively provided for arranging the first fixed end and a first fixing portion (12) and a second fixing portion (13) of the second fixing end, wherein a gap exists between the second fixing end and the second fixing portion in the second direction. A card edge connector according to claim 12, wherein: each of the locking devices is a locking device as claimed in claim 4 or 5; and the second fixing portion includes a blocking portion that cooperates with the hook. The card edge connector of claim 13, wherein: the second fixing portion includes one of the first fixing chambers (131) and one of the second fixing chambers (132) disposed in the third direction. The hook is located in the second fixing chamber, and at least one step (133) constituting the blocking portion is formed at the interface between the first fixing chamber and the second fixing chamber, and the step is engaged with the hook. The card edge connector of any one of claims 12 to 14, wherein: a side of the body of the welding arm adjacent to the second fixed end is provided with a limiting protrusion extending along the second direction, Between the limiting protrusion and the end of the body on which the strip is disposed, a limiting receiving portion is defined; a corresponding position of the body of the locking arm adjacent to one side of the first fixed end is disposed transverse to the locking a blocking member extending toward the welding arm, the body of the arm The blocking member is adapted to fit in the limiting receptacle. A card edge connector according to any one of claims 12 to 14, wherein: the locking arm is disposed adjacent to the engaging end with a blocking extension extending transversely to the body of the locking arm toward the welding arm, the blocking extension The free end of the welding arm is supported. The card edge connector of claim 16, wherein: the extended end of the barrier extension is also provided with a vertical stop extending upwardly in the second direction. The card edge connector of claim 15, wherein: the locking arm is disposed adjacent to the engaging end with a blocking extension extending transversely to the body of the locking arm toward the welding arm, the blocking extension supporting the welding arm The free end. The card edge connector of claim 18, wherein: the extended end of the barrier extension is also provided with one of the vertical stops extending vertically upward. The card edge connector of claim 12, wherein: the card edge connector is a SODIMM card edge connector. A card edge connector assembly comprising two card edge connectors, each card edge connector comprising: a connector body extending in a first direction (X) and perpendicular to the first direction a second direction (Y) having a thickness, a plurality of electrical connection terminals disposed in the connector body; and two locking devices respectively disposed at opposite ends of the connector body in a first direction, wherein: A locking device is a locking device according to any one of claims 1 to 11. The card edge connector assembly of claim 21, wherein: the card edge connector assembly comprises two card edge connectors, and a card edge connector (100) is One of the heights in the second direction is smaller than the height of the other card edge connector (100') in the second direction, and the locking device of the other card edge connector is located in the card in the second direction Above the locking device of the edge connector; the soldering disk of the card edge connector extends in the first direction toward the card receiving space defined by the locking device and the connector body; the other card edge connector includes a connecting portion (51) connecting the welding pad to a welding arm, the connecting portion including a lateral portion (511) extending from the welding arm away from the card receiving space in the first direction, from the lateral portion A vertical portion (512) extending in a direction toward the lower side, the welding disc being coupled to the vertical portion and extending transversely to the vertical portion away from the card receiving space.