BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention generally relates to a card edge connector and more particularly to a card edge connector with a latch.
2. Description of Related Art
U.S. Pat. No. 7,934,936, issued on May 3, 2011, discloses a related card edge connector which includes an elongated housing, a plurality of contacts retained in the housing and a pair of latches pivoted on two opposited ends of the housing. The housing includes two pairs of pivoting holes and an elongated central slot for receiving a daughter card. The central slot opens forwardly so that the daughter card inserts therein along a front-to-rear direction. Each latch has a base portion, a locking head extending downwardly from a front end of the base portion, an ejecting portion extending downwardly from a rear end of the base portion and a pair of pivots pivoting on the pivoting holes of the housing. When the daughter card inserts into the central slot of the card edge connector, the daughter card rearwardly presses the ejecting portion to make the latch rotate downwardly, in this process, the locking head passes through a notch of the daughter card. When the daughter card arrives its final position, the locking head abuts against with an inner wall of the notch along a front-to-rear direction to prevent the daughter card from escaping out of the central slot. However, as a result of the daughter card parallel to a printed circuit board, to which the card edge connector is mounted, the daughter card may swing downwardly when the daughter card is affected by its own gravity or when the card edge connector is shocked by an outside force.
Hence, an improved card edge connector is desired to overcome the above problems.
SUMMARY OF THE INVENTION
According to one aspect of the present invention, a card edge connector, adapted for receiving a daughter card is formed with an elongated insulative housing, a plurality of contacts retained in the housing and a pair of latches pivoted on the housing. The housing has an elongated central slot for receiving the daughter card. The latch has a locking head to lock with the daughter card to prevent the daughter card from escaping out of the central slot in a mating direction. An end of the locking head has a bump for passing through the daughter card to abut against with an outside surface of the daughter card.
The foregoing has outlined rather broadly the features and technical advantages of the present invention in order that the detailed description of the invention that follows may be better understood. Additional features and advantages of the invention will be described hereinafter which form the subject of the claims of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
For a more complete understanding of the present invention, and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which:
FIG. 1 is an assembled, perspective view of a card edge connector and a daughter card inserted into the card edge connector;
FIG. 2 is an explored, perspective view of the card edge connector according to a preferred embodiment of the present invention;
FIG. 3 is a partially exploded view of the card edge connector and the daughter card ejected from the card edge connector;
FIG. 4 is a partially enlarged view of a circle part in FIG. 3; and
FIG. 5 is a left side view of the card edge connector as shown in FIG. 1.
DETAILED DESCRIPTION OF THE INVENTION
Reference will be made to the drawing figures to describe the present invention in detail, wherein depicted elements are not easily shown to scale and wherein like or similar elements are designated by same or similar reference numeral through the several views and same or similar terminology.
Referring to FIG. 1 and FIG. 2, a slanted type card edge connector 100 in a preferred embodiment according to present invention is disclosed and adapted for accommodating a daughter card 200. The card edge connector 100 comprises an elongated insulative housing 1, a plurality of contacts 2 retained in the housing 1, a pair of latches 3 pivoted on the housing 1, two spacers 5 and a pair of board lockers 4 mounted on a bottom of the housing 1 to latch with a printed circuit board (not shown) and a cover 6 mounted on a rear side of the housing 1.
Referring to FIG. 2, the card edge connector 100 is mounted on the printed circuit board at a certain degree, the housing 1 has a pair of longitudinal sidewalls 11, a central slot 12 formed between the sidewalls 11, two towers 14 disposed on two longitudinal ends of the central slot 12 and a key 13 formed in the central slot 12 to divide the central slot 12 into two different parts with different lengths so as to prevent the daughter card 200 from mismating. The sidewalls 11 define a plurality of contact passageways 110 communicating with the central slot 12 to receive the contacts 2, respectively. The housing 1 further has a retaining cavity 15 located on a rear side of the housing 1 and a pair of first tubers 16 protruding rearwardly from two opposite ends of the housing 1. An opening of the central slot 12 slants upwardly so that the daughter card 200 can be inserted into the central slot 12 aslant.
Referring to FIG. 2, each tower 14 has an outside wall 141, an inner wall 142 corresponding to the outside wall 141 along a longitudinal direction of the housing 1, a connecting wall 143 connecting with the outside wall 141 and the inner wall 142, and a rear wall 147 opposited to the connecting wall 143. The inner wall 142 has a clipping slot 144 for clipping the daughter card 200. The tower 14 defines a receiving cavity 146 surrounded by the outside wall 141, the inner wall 142, the connecting wall 143 and the rear wall 147. The outside wall 141 and the inner wall 142 have two opposite channels 145 respectively, two obstruct portions 1412 located on an outside of the channel 145 respectively and two pivoting holes 1411 to assemble the latch 3. The receiving cavity 146 extends through a top surface of the rear wall 147, the clipping slot 144 communicates with the receiving cavity 146 and the central slot 12.
Referring to FIG. 2, the contact 2 has a retaining portion 22 retained in the passageway 110, a contacting portion 21 extending into the central slot 12 from one end of the retaining portion 22 to contact with the daughter card 200 and a soldering leg 23 extending downwardly beyond the housing 1 from the other end of the retaining portion 22.
Referring to FIGS. 3 to 4, the latch 3 has a base portion 30, a locking head 36 extending vertically along an up-to-down direction from a front end of the base portion 30, an operating portion 35 extending upwardly from the front end of the base portion 30 and an ejecting portion 32 extending downwardly from a rear end of the base portion 30 to lift up the daughter card 200. The base portion 30 includes a pair of elastic walls 301, a slit 302 formed between the elastic walls 301, two pivots 33 and two protrusions 34 located on two outer lateral sides thereof. The locking head 36 has a locking surface 361, a bump 360 located on a bottom end of the locking surface 361 and protruding toward the ejecting portion 32. The bump 360 has a pushing surface 3601 and a guiding surface 3602. The pushing surface 3601 Perpendicular to the locking surface 361 so that the locking head 36 can lock the daughter card 200 effectively, the guiding surface 3602 extendes downwardly and forwardly from the pushing surface 3601 to guide the locking head 36 passing through a notch 2001 of the daughter card 200 and formed an obtuse angle therebetween to make the daughter card 200 be locked in the card edge connector 100 or be ejected out of the card edge connector 100 easily. The protrusion 34 has a clined surface 341 extending toward the central slot 12 and a right angle surface 342 far away from the central slot 12. The locking head 36 is located in front of the tower 14.
Referring to FIG. 2, the board locker 4 comprise a securing portion 41 retained in the housing 1 and a pair of legs 42 extending downwardly from the securing portion 41 to lock with the printed circuit board.
The spacer 5 defines a plurality of through holes 51 for receiving corresponding soldering leg 23 of the contacts 2 and a pair of depressions 52 located on two opposite ends thereof.
Referring to FIG. 2 and FIG. 3, the cover 6 assembled to the rear side of the housing 1 has a main body 63, a locking portion 61 extending forwardly from the main body 63 and a pair of second tubers 62 extending downwardly from two opposite ends of the main body 63. The locking portion 61 is received in the retaining cavity 15 of the housing 1 and interference fit with the retaining cavity 15, the first tuber 16 and the second tuber 62 are commonly assembled in the depression 52 of the spacer 5, for this reason, the housing 1, the spacer 5 and the cover 6 are fixed together stably. The soldering leg 23 passes through the through hole 51 of the spacer 5, the cover 6 is located on the rear side of the housing 1 for covering a part of the retaining portion 22 which is exposed in the rear side of the housing 1.
Referring to FIG. 2 and FIG. 4, the latch 3 is received in the receiving cavity 146 of the tower 14. When the daughter card 200 inserts into the central slot 12 of the card edge connector 100, two opposite edges of the daughter card 200 insert in the receiving cavities 146 through the clipping slot 144, and the daughter card 200 presses the ejecting portion 32 rearwardly to make the latch 3 rotate downwardly. In this process, the guiding surface 3602 guides the locking head 36 pass through the notch 2001 of the daughter card 200 and the clined surface 341 and the obstruct portion 1412 abut against each other to push the elastic wall 301 of the latch 3 deflect inwardly, the outside wall 141 and the inner wall 142 of the tower 14 deflect outwardly so as to make the protrusion 34 enter the channel 145. Referring to FIG. 5, when the daughter card 200 arrives its final position, the locking surface 361 of the locking head 36 rearwardly abuts against a rear bottom corner of the notch 2001 to prevent the daughter card 200 from forwardly escaping out of the central slot 12 and the pushing surface 3601 also support upwardly the daughter card 200 to prevent the daughter card 200 from swing downwardly. In addition to, the right angle surface 342 of the protrusion 34 abuts against the obstruct portion 1412, so that a needed force to open the latch 3 is bigger than a force to close the latch 3, to avoid the latch 3 are opened easily. When withdrawn the daughter card 200 from the card edge connector 100, the latch 3 is rotated upwardly and the ejecting portion 32 lift up the daughter card 200, by such a way that the daughter card 200 leaves away from the central slot 12.
The locking head 36 has the bump 360 for upwardly supporting the daughter card 200 when the daughter card 200 arrives its final position to avoid the daughter card 200 to swing downwardly, even if the daughter card 200 is affected by its own gravity or the card edge connector 100 is shocked by an outside force. It is noted that in the embodiment the receiving slot defines a width dimensioned in snug compliance with a thickness of the daughter card. The locking head is directed downwardly when the latch is located at the lower locking position. Moreover, an upper face of the tower forms an opening upwardly communicating the receiving cavity with the exterior so as to allow the elongated base portion of the corresponding latch to extend therethrough upwardly when said latch is located at the upper unlocking position understandably.
It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Patent Grant
8814580
