TWI411174B - Card edge connector - Google Patents

Abstract

The invention relates to an edge connector, comprising an insulation shell, a top buckle type component and a pushing piece. The insulation shell comprises opposite end parts and a card slot. The top buckle type component can pivot in the end and comprise a front end surface, a latching part, an ejecting part and an arm part. The front end surface faces the card slot; the latching part is formed on the front end surface and configured to be a latching printing circuit card; the ejecting part is formed on the front end surface and configured to pivot together with the ejecting component to bunt the front edge of the insertion edge part of the printing circuit card at the top, so as make the printing circuit card exit from the card slot; the arm part extends apart from the front end surface. The pushing piece comprises a pushing part and the pushing part moves in the end and configured to bunt with arm part of the ejecting part to pivot the top buckle type component. The edge connector is easily and safely operated and suitable for standard or not-standard memory module.

Description

Card edge connector

The present disclosure relates to a card edge connector, and more particularly to a card edge connector having a card ejecting and latching card mechanism, which can be used for retracting and latching heights greater than a standard electronic card module.

A plurality of card edge connectors can be provided on a printed circuit board that provides only limited functionality to receive printed circuit cards having different functions, thereby expanding the functions of the printed circuit boards. Typically, the printed circuit cards that are inserted into the card edge connectors are removable, and to smoothly exit the printed circuit cards, card ejecting mechanisms are often used to exit the printed circuit cards.

By way of example, in a computing system, a memory module is a printed circuit card that is well known to the public. In order to exit a memory module, many card withdrawal mechanisms have been developed. Traditionally, lever arms have often been used to perform card withdrawal operations. However, the lever arm is usually close to the motherboard and therefore is not easy to operate. Moreover, the lever arm requires a large space to facilitate its rotation. Therefore, the lever arm is not compatible with today's compact design.

In order to solve the above-mentioned deficiencies, a number of card-removing institutions are proposed, for example, U.S. Patent No. 5,571,025 to Arai et al., U.S. Patent No. 5,577,922 to Enomoto et al., and U.S. Patent No. 5,660,552 to Suzuki et al. The foregoing patent discloses a similar ejecting mechanism comprising a push rod and a rotating member, wherein the rotating member can contact the push rod and one of the insertion ends of a circuit card. The push rod transmits a force to one end of the rotating member such that the rotating member rotates. After the other end of the rotating rotating member contacts the insertion end of the printed circuit card, it is pushed until the printed circuit card is ejected. Typically, the inserted printed circuit card is clamped to avoid accidental removal. Moreover, the inserted printed circuit card usually needs to be moved a certain distance before it can be completely exited. Therefore, in order for the inserted printed circuit card to be completely withdrawn, the rotating member must be large enough to generate sufficient leverage to make the card ejection operation smooth, and the rotating member must be rotated to a certain degree to move the printed circuit card. Beyond one of the aforementioned distances. Therefore, the card edge connector needs to have a large space to accommodate the rotating member, which will cause the card edge connector to be thickened and the electrical path of the terminal to be lengthened.

Further, in the card edge connector disclosed in the aforementioned patent, the inserted printed circuit card is mainly latched by a latch mechanism, wherein the latch mechanism operates independently of the aforementioned push rod and the aforementioned rotating member. When the inserted printed circuit card is ejected, additional force is required to remove the latch mechanism from the recess or slit of the inserted printed circuit card during or before the card ejection operation. Therefore, the fact that the latch mechanism operates independently of the push rod may cause accidental damage and requires a large operating force, which is extremely inconvenient for use.

In addition, U.S. Patent No. 5,571,025 to Arai et al. discloses a pusher that includes a card retaining arm that engages the port to retain the circuit card in the connector. The card retaining arm is tilted to disengage from the corresponding slit, the action of which is accomplished by a combination of a plurality of projections disposed on the push rod and a recess on the guide post that receives the pusher. This mechanism is too complicated and difficult to assemble.

In addition, the card ejecting mechanism of the aforementioned patent is designed for a standard full-sized form of memory module. However, these organizations are not compatible with memory modules that are higher than standard memory modules.

In summary, the conventional card edge connector card release mechanism still has some defects, so that a new card edge connector that can be easily and safely operated and adapted to a standard or non-standard memory module is still expected.

It is an object of the present invention to provide a new and improved card edge connector that can easily and safely eject an insertion card and is suitable for both standard and non-standard printed circuit cards.

To achieve the above object, an embodiment of the present invention provides a card edge connector. The card edge connector can be configured to receive a printed circuit card having a plurality of notches and a plurality of electrical contact pads, the notches being respectively disposed on opposite side edges, and the electrical contact pads are along the printing One of the circuit cards is inserted into the edge setting. The card edge connector comprises an insulative housing, a plurality of conductive terminals, a top fastening member and a pushing member. The insulative housing includes opposing ends and a card slot, wherein the card slot is disposed between the opposite ends. A plurality of conductive terminals are provided in the insulative housing. Each of the conductive terminals has a contact portion, wherein the contacts of the conductive terminals are configured to contact the electrical contact pads on the printed circuit card. The top button member is configured to pivot within the end portion and includes a front end face, a latch portion, an ejector portion and an arm portion. The front end surface faces the card slot; the latch portion is formed on the front end surface adjacent to an upper edge of the front end surface, and is configured to latch the printed circuit card inserted in the card slot; the ejector portion is formed Adjacent to a lower edge of the front end face, and configured to pivot against the leading edge of the insertion edge of the printed circuit card with the pivoting member to pivot the printed circuit card from the card The slot exits; the arm extends away from the front end face. The pushing member has a pushing portion movable within each of the ends and configured to contact the arm portion of the top button member to pivot the top button member.

The technical features and advantages of the present disclosure are summarized above, and the detailed description of the present disclosure will be better understood. Other technical features and advantages of the subject matter of the claims of the present disclosure will be described below. It is to be understood by those of ordinary skill in the art that the present invention disclosed herein may be It is also to be understood by those of ordinary skill in the art that this invention is not limited to the spirit and scope of the disclosure disclosed in the appended claims.

Since the beginning of the present invention, the embodiment of the card edge connector with the card ejecting mechanism will be described later in the drawings. As shown in FIGS. 1 and 2, the card edge connector 1 provided on the printed circuit board 2 is constructed to accept the printed circuit card 3 disposed in the upright direction. The printed circuit card 3 is interposed between the two pushers 11 for the card ejection operation. The printed circuit card 3 can include an insertion edge portion 31 and a plurality of electrical contact pads 32 along which the electrical contact pads 32 are spaced apart. 31 settings. The printed circuit card 3 can further comprise a plurality of notches 33, which are respectively disposed on opposite side edges 34 of the printed circuit card 3. In this embodiment, the printed circuit card 3 may include, for example, a memory card module, such as a double data rate synchronous DRAM (for example, DDR SDRAM, DDR2 SDRAM, or DDR3 SDRAM). The printed circuit card 3 can conform to a standard full-sized circuit card or can be higher than the standard height of the circuit card. In order to allow the card edge connector 1 of the present invention to smoothly eject the printed circuit card 3 above the standard height, the two pushers 11 approximately equal in height to the printed circuit card 3 are erected and supported on the respective sides. The side portion 34 is such that the user can conveniently use the pushers 11 to withdraw the inserted printed circuit card 3.

Referring to FIG. 2, the card edge connector 1 includes a long-shaped insulating housing 12 having two opposite end portions 121 and a card slot 122. The card slot 122 is attached to the two ends 121. Between and extending upwardly, the card slot 122 is constructed to receive the insertion edge 31 of the printed circuit card 3. Each end portion 121 has a hollow interior in which a top button member 13 is disposed. On the top fastening member 13, a pusher 11 is supported on the corresponding end portion 121.

Referring to FIGS. 1, 3 and 4, in the insulative housing 12, a plurality of recesses are arranged on opposite sides of the card slot 122 and are configured to receive the conductive terminals 14. Each of the conductive terminals 14 includes a contact portion 141 and a tail end portion 142. The contact portion 141 can protrude into the card slot 122 to contact the electrical contact pads on the printed circuit card 3, and the tail end portion 142 is downward. The insulative housing 12 is extended and protruded, and as shown in FIG. 4, a surface-adhered configuration is formed to be placed on the electrical pads on the printed circuit board 2 to connect the circuits on the printed circuit board 2. In addition, each of the conductive terminals 14 can include a tail end portion that can extend downwardly and projecting from the insulative housing 12 and form a perforated pin configuration that can be threaded through a corresponding aperture in the printed circuit board 2. Each end portion 121 is defined by a circumference surrounded by two side walls 1211, two inner walls 1212 and one end wall 1213. The two inner walls 1212 are separated by a groove 123. The groove 123 communicates with the card slot 122 and has a width sufficient to accommodate the corresponding side portion 34 of the inserted printed circuit board 2 (as shown in FIG. 1). ).

Referring to Fig. 3, the card edge connector 1 is constructed as shown in Fig. 1 and is fixed to the printed circuit board 2. To this end, a plurality of positioning members 15 and holding members 16 are provided. Referring to FIG. 4, a positioning member 15 and a holding member 16 are fixed to the corresponding end portions 121. Each of the positioning members 15 has a head end portion and a leg portion. The head end portion is received in a recess 1214 of the end portion 121, and the leg portion is constructed to protrude from the bottom portion of the end portion 121 for insertion. A hole is commensurate on the printed circuit board 2 for positioning.

Referring to FIG. 4, each of the retaining members 16 has a hook portion 161 and a flat portion 162, and the bottom surface of the flat portion 162 can be welded to the printed circuit board 2. Corresponding to the holder 16, a concave surface 1215 is formed on the bottom surface of the end portion 121 and a horizontal hook strip 1216 is adjacent to the bottom surface of the end portion 121. When the retaining member 16 is installed, the hook portion 161 hooks the horizontal hook strip 1216, and the flat portion 162 is disposed on the concave surface 1215.

Figures 5 and 6 show a detail of one of the top fastening members 13. The top button member 13 pivots at the respective end portion 121. The top button member 13 is constructed to latch or latch an inserted printed circuit card 3 to prevent the printed circuit card 3 from being accidentally removed, and is configured to smoothly exit an inserted printed circuit card 3 in a pivotal manner. To this end, the top button member 13 includes a front end surface 131, a latch portion 132, an ejector portion 133, and an arm portion 134. The front end surface 131 faces the card slot 122 or a corresponding one of the side edges of the printed circuit card 3 as shown in FIG. 3. The front end surface 131 includes two opposite side edges, a lower edge 1311 and an upper edge 1312. The ejector portion 133 protrudes from the front end surface 131 and is adjacent to the lower edge 1311 of the front end surface 131. The ejector portion 133 is configured to be inserted into the insertion edge portion 31 of the printed circuit card 3 when a force is applied to the top fastening member 13. The leading edge, near the corner of the corner, exits the printed circuit card 3 from the card slot 122. The latch portion 132 is configured to hold the printed circuit card 3 inserted into the card slot 122, and the latch portion 132 is adjacent to the upper edge 1312 of the front end face 131. The arm portion 134 extends against the reverse front end face 131 and is configured to rotate the top button member 13 to exit the insertion printed circuit card 3.

In particular, the top button member 13 includes a slot 135. The slot 135 is formed on the front end surface 131 and is surrounded by the latching portion 132, the ejector portion 133, and the two side walls 136. The width of the slot 135 is greater than the thickness of the printed circuit card 3, so that the ejector portion 133 can be moved along the leading edge of the printed circuit card 3 when the card is inserted or retracted, instead of being inserted by the edge portion 31 and the side portion 34. The portion formed near the corresponding corner is obstructed. The ejector portion 133 protrudes from the front end surface 131 and forms a corner angle 1331 between the side surface of the ejector portion 133 and the side surface of the front end surface 131, wherein the corner angle 1331 can be subjected to a chamfering treatment to strengthen the strength of the ejector portion 133. Referring to FIG. 6, the back surface 1332 of the ejector portion 133 may be recessed, and the two rounded corners 1333 are correspondingly formed at the boundary between the inner surface of the side walls 136 and the back surface 1332 to similarly strengthen the strength of the ejector portion 133.

Referring to FIGS. 5 and 6, the two pivoting portions 137 are formed on the outer sides of the respective side walls 136. A bump portion 138 is formed on each of the side walls 136, and the bump portion 138 is formed to restrict the movement of the top button member 13. Each of the bump portions 138 has two opposite inclined faces 1381, and one of the inclined faces 1381 faces the card slot 122 of the card edge connector 1. The arms 134 can have substantially uniform widths that can be less than the upper edge 1312 or the lower edge 1311. The arm portion 134 may also include an enlarged portion and tapers from the enlarged portion toward the thinner end portion 1342, and the upper surface 1341 defining the arm portion 134 may connect the peripheral side surface of the latch portion 132. As best seen in Figure 17, the end portion 1342 of the arm portion 134 can be perpendicular to the front end face 131 such that when the top button member 13 is moved to a latched position, the tip portion 1342 can be substantially horizontal. The end portion 1342 is constructed to provide a relatively high leverage efficiency for the shorter length of the top button member 13.

Referring to FIGS. 5 to 8, the periphery of each end portion 121 is two inner walls 1212 and one end wall 1213 which are disposed side by side with respect to the two side walls 1211. A plurality of grooves are formed in each end portion 121. As shown in FIG. 8, a pivot hole 12111 is formed in each side wall 1211 to receive a corresponding pivoting portion 137, so that the top button member 13 can rotate around the pivot portion 137 in the end portion 121. Referring to FIG. 5 and FIG. 8, a recessed area 12114 is formed on the inner side surface of each side wall 1211, and a recessed area 12114 extends from the top surface of the side wall 1211 to the pivot hole 12111, and is configured to temporarily retain the corresponding bump. Department 138. As such, when the bump portion 138 is located within the corresponding lower recess 12114, the front and rear movements of the top button member 13 will be limited.

Referring to Figures 8 through 11, the pusher 11 is adapted to rotate the respective top button member 13 within the end portion 121 to withdraw the inserted printed circuit card 3. Each of the pushers 11 includes a support portion 111 that is configured to lean against the top surface of the corresponding end portion 121 when the printed circuit card 3 is not inserted, so that the pusher 11 is supported. The support portion 111 can have a pair of front bottom surfaces 1111, and each of the front bottom surfaces 1111 and the top edge surfaces of the corresponding side walls 1211 of the end portions 121 are disposed correspondingly and can abut each other. The support portion 111 may further have a pair of rear bottom surfaces 1112, and each of the rear bottom surfaces 1112 and the top end surface of the corresponding end wall 1213 of the end portion 121 are disposed correspondingly and can abut each other. With the front bottom surface 1111 and the rear bottom surface 1112, each of the pushing members 11 can avoid exceeding the lowest position when moving downward, and can avoid falling inward or outward when the top fastening member 13 is in the open position.

Referring to FIG. 8 , FIG. 9 and FIG. 10 , the two positioning rods 113 extend from one side of the front bottom surface 1111 of the support portion 111 , and a pushing portion 114 is disposed between the two positioning rods 113 . The portion 114 has an end surface 1141 that is configured to abut the end portion 1342 of the arm portion 134. Correspondingly, as shown in FIG. 8, a rod receiving groove 12112 is formed on the inner side surface of each side wall 1211 of the end portion 121 to guide the corresponding positioning rod 113. On the bottom surface of the rod receiving groove 12112, a concave section 12113 is formed. Each of the positioning rods 113 includes a side protrusion 1131, and the side protrusions 1131 protrude laterally and are disposed corresponding to the concave sections 12113. Referring to FIG. 11, when the pusher 11 is mounted on the end portion 121, the side bumps 1131 enter the corresponding concave sections 12113, and the pusher 11 is restricted to extend only vertically from the concave section 12113. Move within the range.

Referring to Figs. 8 and 10, on the inner side surface of the end wall 1213 of each end portion 121, three parallel elongated grooves 12131 are formed in the moving direction of the pusher member 11. Accordingly, an elongate projecting member 112 and two side lug members 1132 are formed on the pusher member 11. The projecting member 112 is movable within an intermediate elongated slot 12131 formed on the side of the push portion 114 that faces the end wall 1213. The two side protrusions 1132 are respectively protruded from the corresponding positioning rods 113, and the two side protrusions 1132 are disposed corresponding to the two side elongated slots 12131, and are respectively movable in the two side elongated slots 12131. The combination of the projecting member 112 and the intermediate elongate slot 12131, and the combination of the lug members 1132 on both sides and the elongate slots 12131 on both sides guide the movement of the pusher 11. Moreover, the engagement of the projecting member 112 with the intermediate elongated slot 12131 prevents the pushers 11 from being mounted in an incorrect combination orientation.

Referring to FIG. 12 and FIG. 13 , each pushing member 11 further includes a body portion 115 and a head end portion 116. The head end portion 116 is supported by the body portion 115 and is configured to be used by a user's finger. Or touch the thumb. The body portion 115 can have an elongated shape to thereby encourage airflow through the body portion 115 to enhance heat dissipation into the printed circuit card 3. A long slit 117 is provided along the inner side of the body portion 115. The slits 117 are configured to allow the corresponding side portions 34 of the printed circuit card 3 to slide therein to provide guidance when the printed circuit card 3 is installed. The head end portion 116 can have a beveled surface 1161 that faces and slightly faces away from the card edge connector 1, whereby the pusher member 11 can still be pushed toward the card edge connector 1 when the printed circuit card 3 is being ejected. In an embodiment, each of the pushers 11 can be plastic molded. In another embodiment, the metal ribs can be embedded in each of the pushers 11, such that a heavier pusher 11 can be obtained to provide different applications.

Referring to FIGS. 1, 14, and 15, when a printed circuit card 3 is to be inserted into the card edge connector 1, the side portions 34 of the printed circuit card 3 are first inserted into the slits 117 of the corresponding pushers 11, and then The printed circuit card 3 is moved toward the card edge connector 1 until the insertion edge portion 31 is close to the card slot 122. Next, the printed circuit card 3 is pushed into the card edge connector 1. Prior to insertion of the printed circuit card 3, each of the top fastening members 13 is in the open position. In particular, each of the top fastening members 13 is inclined, and the ejector portion 133 is located in the card slot 122, and is intended to abut against the leading edge of the insertion side portion 31. In the insertion of the printed circuit card 3, once the leading edge of the insertion edge portion 31 abuts against the ejector portion 133, the insertion edge portion 31 of the printed circuit card 3 starts to push the ejector portion 133 and is oriented in the direction indicated by the arrow A in FIG. Upper, the top button member 13 is rotated. When the top fastening member 13 is rotated, the arm portion 134 of the top fastening member 13 abuts against the pushing portion 114 and moves the pushing member 11 upward until the latch portion 132 is latched into the recess 33 of the corresponding printed circuit card 3 or as The latching position of the top button member 13 shown in Figs. 16 and 17 is shown. As is clear from Fig. 14, at the time of card insertion, a corner of the insertion side portion 31 is freely movable in the slit 135 of the top button member 13.

As shown in FIG. 17, when an inserted printed circuit card 3 is to be withdrawn, a force is applied to the head end portion 116 of the pusher member 11, at which time the push portion 114 abuts against the arm portion 134 of the top button member 13. The pushing portion 114 pushes the arm portion 134 of the top button member 13 to rotate the top button member 13 in a direction opposite to the direction indicated by the arrow A. When the top button member 13 begins to rotate, the latch portion 132 is removed from the corresponding recess 33, such that the latch portion 132 will no longer latch the printed circuit card 3, so that the removal of the printed circuit card 3 does not require additional force . When the top button member 13 rotates, the ejector portion 133 of the top button member 13 abuts against the leading edge of the insertion edge portion 31 of the printed circuit card 3, and moves the printed circuit card 3 away from the card slot 122 until the printed circuit card 3 As shown in Fig. 15, in general, the card edge connector 1 is completely withdrawn. Finally, the printed circuit card 3 can be taken out along the long slit 117 of the pusher 11.

In summary, the card edge connector of the present invention includes a pusher member having a height sufficient for the user to easily withdraw the high printed circuit card without difficulty in the card withdrawal operation. The card edge connector further includes a top button member that pivotally latches and ejects the printed circuit card, wherein the top button member is rotated by the pusher member. The top button member may include a front end surface, a latch portion, an ejector portion and an arm portion. The latch portion projects from the front end face and is configured to withdraw a printed circuit card. The latch portion is configured to latch a printed circuit card inserted into the card slot, which is formed on the front end face. The arm extends opposite the front end face and is configured to rotate the top button member to withdraw the printed circuit card.

The technical content and technical features of the present disclosure have been disclosed as above, and those skilled in the art can still make various substitutions and modifications without departing from the spirit and scope of the disclosure. Therefore, the scope of the present disclosure is not to be construed as being limited by the scope of

1. . . Card edge connector

2. . . A printed circuit board

3. . . Printed circuit card

11. . . Pusher

12. . . Insulating housing

13. . . Top button member

14. . . Conductive terminal

15. . . Positioning member

16. . . Holder

31. . . Inserting the edge

32. . . Electrical contact pad

33. . . Notch

34. . . Side section

111. . . Support department

112. . . Protruding part

113. . . Positioning rod

114. . . Promotion department

115. . . Body part

116. . . Head end

117. . . Long seam

121. . . Ends

122. . . Card slot

123. . . Trench

131. . . Front end face

132. . . Latch

133. . . Ejection

134. . . Arm

135. . . Slotting

136. . . Side wall

137. . . Pivot

138. . . Bump

141. . . Contact

142. . . Tail end

161. . . Hook

162. . . Flat part

1111. . . Front bottom

1112. . . Rear bottom

1131. . . Side bump

1132. . . Side bump piece

1141. . . End face

1161. . . Bevel

1211. . . Side wall

1212. . . Inner wall

1213. . . End wall

1214. . . Groove

1215. . . Concave surface

1216. . . Horizontal hook

1311. . . Lower edge

1312. . . Upper edge

1331. . . Corner

1332. . . back

1333. . . Fillet

1341. . . Upper surface

1342. . . End

1381. . . Inclined surface

1111. . . Front bottom

12111. . . Pivot hole

12112. . . Rod receiving slot

12113. . . Concave section

12114. . . Lower recess

12131. . . Long slot

1 is a schematic view showing a card edge connector and a circuit board according to an embodiment of the present invention;

2 is a perspective view showing a card edge connector according to an embodiment of the present invention;

Figure 3 is an exploded perspective view of Figure 2;

4 is a partial enlarged view of an end portion of an insulating case according to an embodiment of the present invention;

FIG. 5 is a perspective view showing a top button member according to an embodiment of the present invention; FIG.

Figure 6 is another perspective view of the top button member of Figure 5;

7 is a top plan view showing an end portion of an insulating case according to an embodiment of the present invention;

Figure 8 is a partial enlarged cross-sectional view showing an end portion of an insulating case according to an embodiment of the present invention;

9 is a perspective view showing a pusher and a pushing portion thereof and a positioning rod member according to an embodiment of the present invention;

Figure 10 is a perspective view showing another embodiment of the pusher and its pushing portion and the positioning rod according to an embodiment of the present invention;

Figure 11 is a partially enlarged cross-sectional view showing the alignment between the positioning rod and the rod receiving groove according to an embodiment of the present invention;

Figure 12 is a perspective view showing a pusher according to an embodiment of the present invention;

Figure 13 is a front elevational view showing a pusher according to an embodiment of the present invention;

Figure 14 is a partially enlarged cross-sectional view showing a pusher member, a top button member and a printed circuit card according to an embodiment of the present invention;

Figure 15 is a partially enlarged cross-sectional view showing a pusher member, a top button member in an open position, and a printed circuit card, in accordance with an embodiment of the present invention;

Figure 16 is a view showing a card edge connector and an inserted printed circuit card 3 according to an embodiment of the present invention; and

Figure 17 is a partial perspective enlarged cross-sectional view showing a pusher, a top button member in a latched position, and a printed circuit card, in accordance with an embodiment of the present invention.

11. . . Pusher

12. . . Insulating housing

13. . . Top button member

14. . . Conductive terminal

15. . . Positioning member

16. . . Holder

121. . . Ends

122. . . Card slot

123. . . Trench

141. . . Contact

142. . . Tail end

1211. . . Side wall

1212. . . Inner wall

1213. . . End wall

Claims (11)

A card edge connector for receiving a printed circuit card, the printed circuit card having a plurality of notches and a plurality of electrical contact pads, the notches being respectively disposed on opposite side portions, and the electrical contact pads Inserted along one edge of the printed circuit card, the card edge connector comprises: an insulative housing comprising opposite ends and a card slot, the card slot being disposed between the opposite ends; the plurality of conductive Terminals are provided in the insulative housing and each have a contact portion, the contacts are configured to contact the electrical contact pads on the printed circuit card; and a top button member is configured to pivot within the end portion The top button member includes: a front end surface facing the card slot; a latch portion formed on the front end surface adjacent to an upper edge of the front end surface, the latch portion being configured to be inserted into the latch a printed circuit card in the card slot; an ejector portion formed on the front end surface adjacent to a lower edge of the front end surface, the ejector portion being configured to abut against the pivoting member of the top buckle member The leading edge of the insertion edge of the printed circuit card to mark the print The circuit card is withdrawn from the card slot; and an arm portion extends away from the front end surface; a pushing member has a pushing portion movable in each end portion and constructed to be opposite to the top portion The arm portion of the buckle member contacts to pivot the top button member. The card edge connector of claim 1, wherein each of the pushing members further comprises a supporting portion that can abut against a top edge surface of the corresponding end portion to prevent the pushing member from moving downward. The card edge connector of claim 2, wherein the pushing member comprises a body portion and an end portion, the body portion having an elongated shape, and the head end portion is supported by the body portion and constructed to be A user's finger or thumb is pressed. According to the card edge connector of claim 3, each of the pushing members further includes two positioning rods, and the two positioning rods are disposed on opposite sides of the pushing portion; each end portion includes two opposite side walls and two rods a receiving groove, the two side walls define the end portion, and the rod receiving grooves are respectively disposed on the two side walls, wherein each of the rod receiving grooves is configured to guide the corresponding positioning rod when the pushing member moves . The card edge connector of claim 4, wherein each of the positioning rod members further comprises a side protrusion; each of the rod receiving grooves comprises a concave portion, wherein the pushing member is mounted to the corresponding end portion Thereafter, each of the side bumps is restricted from moving in the corresponding concave section. The card edge connector of claim 5, wherein each of the end portions includes an end wall having an elongated slot, and each of the pushing members further includes an elongated protruding member, the protruding member and the protruding member The elongated slot is correspondingly disposed, wherein the cooperation between the protruding member and the elongated slot guides the movement of the pusher and prevents the pusher from being incorrectly installed. A card edge connector according to any one of claims 1 to 5, wherein the end portion of the arm portion extends substantially perpendicular to the front end face. The card edge connector of claim 7, wherein the top button member further comprises a slot formed on the front end surface, wherein the slot is allowed to be inserted when the printed circuit card is inserted or withdrawn One of the printed circuit cards is free to move in a corresponding corner. The card edge connector of claim 8, wherein the top button member further comprises two side walls and two pivoting portions, the slot is located between the two side walls, and the two pivoting portions are respectively disposed on the two side walls. To pivot the top button member. The card edge connector of claim 9, wherein the top button member further comprises a plurality of bump portions, the bump portions being correspondingly formed on the two side walls, the bump portions for limiting the top button member The movement. The card edge connector of claim 3, wherein the head end portion includes an inclined surface that faces upward and is slightly disposed away from the insulating housing.