Reliable card edge connector with narrow latch

1 . A card edge connector, comprising:

a housing comprising a body, a tower narrower than the body in a transverse direction, and a slot extending from the body to the tower, the tower comprising:

a tower body protruding from an end of the body of the housing, and

an extension protruding from the tower body away from the slot; and

a latch comprising:

a lower portion pivotably connected to the body of the housing such that the latch can move between a locked position and an unlocked position, and

an upper portion extending from the lower portion, the upper portion comprising a recess configured to receive the extension of the tower when the latch is in the locked position.

2 . The card edge connector of claim 1 , wherein:

the extension of the tower comprises concave surfaces on opposite sides;

the upper portion of the latch comprises convex surfaces disposed in the recess; and

the convex surfaces of the upper portion of the latch are configured to snap into respective concave surfaces of the extension of the tower when the latch is in the locked position.

3 . The card edge connector of claim 1 , wherein:

the upper portion of the latch comprises a pair of beams disposed on opposite sides of the recess; and

the pair of beams comprises convex surfaces.

4 . The card edge connector of claim 1 , wherein:

the extension of the tower comprises a pair of protrusions spaced apart;

the upper portion of the latch comprises a pair of bulges; and

each of the pair of protrusions of the tower is configured to engage a respective one of the pair of bulges when the latch is in the locked position.

5 . The card edge connector of claim 4 , wherein:

the extension of the tower comprises a pair of reinforcing walls; and

each of the pair of reinforcing walls is connected to the tower body and a respective one of the pair of protrusions.

6 . The card edge connector of claim 5 , wherein:

the pair of reinforcing walls of the extension of the tower comprise surfaces facing the latch and inclined toward the slot of the housing;

the latch comprises slanted surfaces disposed in the recess; and

each of the surfaces of the pair of reinforcing walls of the extension of the tower is configured to abut against a respective one of the slanted surfaces of the latch when the latch is in the locked position.

7 . The card edge connector of claim 1 , wherein:

the upper portion of the latch comprises a pair of bulges;

the extension of the tower comprises a pair of grooves on opposite sides; and

the pair of grooves are configured to receive respective ones of the pair of bulges.

8 . The card edge connector of claim 1 , wherein:

the tower body is integrally formed with the body of the housing.

9 . The card edge connector of claim 1 , wherein:

the extension is a separate component, and/or comprises different material than the tower body.

10 . A latch for a card edge connector, the latch comprising:

a lower portion comprising a pair of pivot portions configured to engage matching recesses of a housing for the card edge connector such that the latch is pivotably connected to the housing;

an upper portion extending from the lower portion, the upper portion comprising a recess and a pair of bulges disposed in the recess; and

a heat dissipation hole extending through at least a portion of the lower portion and a portion of the upper portion.

11 . The latch of claim 10 , wherein:

each bulge of the pair of bulges comprises a first bulge sidewall and a second bulge sidewall; and

the first bulge sidewall and the second bulge sidewall extend at an angle to each other.

12 . The latch of claim 11 , wherein:

each bulge of the pair of bulges comprises a first surface joining the first bulge sidewall and the second bulge sidewall, and a second surface opposite to the first surface and joining the first bulge sidewall and the second bulge sidewall; and

the second surface inclines toward the first surface.

13 . A card edge connector comprising:

a housing comprising a body, a tower, and a slot extending from the body to the tower, the tower comprising a tower body protruding from an end of the body of the housing and an extension protruding from the tower body away from the slot;

a reinforcing member between the tower body and the extension of the tower; and

a latch pivotably connected to the body of the housing, the latch comprising a recess configured to receive the extension of the tower, wherein:

the tower body comprises a lower portion and an upper portion extending from the lower portion, the lower portion extending toward the latch beyond the upper portion; and

the extension is connected to both the upper portion and the lower portion of the tower body.

14 . The card edge connector of claim 13 , wherein, for the housing:

the tower is narrower than the body in a transverse direction.

15 . The card edge connector of claim 13 , wherein:

the reinforcing member comprises a reinforcing body;

a section of the reinforcing member is in a U shape; and

an end of the slot extends into an opening of the U shape.

16 . The card edge connector of claim 15 , wherein:

the reinforcing member is inserted between the upper portion of the tower body and the extension.

17 . The card edge connector of claim 16 , wherein:

the upper portion of the tower body comprises:

a first pillar and a second pillar disposed on opposite sides of the slot, and

an end wall separated from the first pillar and the second pillar by a gap;

the extension of the tower extends from the end wall of the upper portion of the tower body; and

a bottom of the U shape is inserted into the gap, and two sides of the U shape respectively surround and abut against the first pillar and the second pillar.

18 . The card edge connector of claim 17 , wherein:

the first pillar and the second pillar are offset from outer side surfaces of the lower portion of the tower body such that the two sides of the U shape are flush with the outer side surfaces of the lower portion of the tower body.

19 . The card edge connector of claim 18 , wherein:

the reinforcing member further comprises a pair of front walls; and

the pair of front walls extend from two ends of the U shape toward each other.

20 . The card edge connector of claim 19 , wherein:

the reinforcing member further comprises:

a first hook and a second hook protruding from the front walls, and

a third hook protruding from a bottom of the U shape; and

the tower comprises a first recess, a second recess, and a third recess configured to receive the first hook, the second hook, and the third hook, respectively.