JPH0760721B2 - Card connector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card connector for making an electrical connection between a card and a printed circuit board, and more specifically for a card that can operate with a card having a capacity of 32 bits or 16 bits. Regarding the contacts of the connector.

[0002]

Card connectors are known for providing an electrical connection between a printed circuit board and a card having 32-bit or 16-bit capability.
Known card connectors include a housing having first and second side walls with a cavity therebetween for receiving a card. Each of the housing sidewalls is formed by a slot therein, each slot extending into the cavity such that when the card is inserted into the cavity, a force is applied at its point of contact that is normal to the plane of the card. A beam-type contact having a contact point that makes contact. A first contact with a higher contact point and a second contact with a lower contact point are employed to accommodate cards with either 32 bit or 16 bit capability.

More specifically, the first contact and the second contact
A plurality of contacts are employed, and each of the contacts has a base, a beam portion extending above the base, and an inverse U from the beam portion toward the cavity.
A U-shaped portion bent in a U-shape, a first straight line portion which is continuous with the U-shaped portion and extends obliquely downward on the cavity side, and a first straight line portion which is continuous with the first straight line portion and diagonally downward on the opposite side to the cavity side. At a boundary between the first straight line portion and the second straight line portion, the contact point facing the cavity and coming into contact with the card 20 inserted in the cavity, and below the base. Each has a length of the first electrical path and a length of the second electrical path combined with the respective lengths of the extending tail portions.

The beam portion of the first contact is longer than the beam portion of the second contact, and the height of the contact point of the first contact from the lower surface of the base is the same as that of the second contact. Higher than the height of the point from the bottom surface of the base. That is, the first contact has a high contact point and the second contact has a low contact point.

The contacts are then staggered along each sidewall such that the first contact with the higher contact point is adjacent to or disposed with the second contact with the lower contact point. Arranged by. For 16-bit capable cards, the card only engages the high contact points of the first contact, and for 32-bit capable cards, the card engages the high contact points of the first contact and the second contact point. Engage with low contact points.

[0006]

According to the above prior art, there are problems in the following points. That is, the length of the first electric path of the first contact and the length of the second electric path of the second contact have not been set to be particularly equal. Therefore, when the above-mentioned first contact and second contact are used at the same time, such as when using the above-mentioned 32-bit capacity card, due to the difference in the length of the electric path, the signal distortion or the signal timing deviation occurs. Etc. may occur, causing a problem in signal exchange between the card and the printed circuit board.

Therefore, it is an object of the present invention to make the length of the first electric path of the first contact equal to the length of the second electric path of the second contact to prevent signal distortion and It is to provide a technique for reducing the timing deviation.

[0008]

[Means for Solving the Problems] In order to solve the above object,
The present invention has the following technical means. That is, the present invention will be described with reference to the reference numerals in the accompanying drawings corresponding to the embodiments. According to the present invention, the cavity 16 into which the card 20 is inserted, the side walls 12 and 14 located on both sides of the cavity 16, and the both sides Wall 12,
Housing 11 having slots 30 and 32 for accommodating contacts 34 and 36 formed on the cavity 16 side of 14
A card connector 10 for mechanically / electrically connecting the card 20 and the printed circuit board 28,
The contacts 34 and 36 include the bases 50 and 70 and beam portions 54 and 74 extending upward from the bases 50 and 70.
And U-shaped portions 56 and 76 bent from the beam portions 54 and 74 into an inverted U-shape, and the U-shaped portions 56 and
76 and a first straight line portion 58, 78 extending diagonally downward from the beam portion 54, and a second straight line 58, 78 extending diagonally downward toward the beam portion 54. Straight portions 59, 79 and the first
Contact points 60 and 80 which are apexes between the straight line portions 58 and 78 and the second straight line portions 59 and 79 and which face the cavity 16 and contact the card 20 inserted in the cavity 16 and the base 50. , 70, and tails 52, 71 extending below the first contact 34 and the second contact 36.
In addition, the beam portion 54 of the first contact 34 is longer than the beam portion 74 of the second contact 36, and the contact point 60 is higher than the contact point 80 of the second contact 36. Having a higher contact point 60 in position, the second contact 36 has its beam portion 74
Is shorter than the beam portion 54 of the first contact 34,
The contact point 80 is the contact point 60 of the first contact 34.
In a card connector having a lower contact point 80 at a lower position; the contacts 34,36 are:
The upper end 130 of the housing 11 of the first contact 34
To the contact point 60 of the longer contact 34 from A
And the height H representing the distance of the tail portion 52 to the printed circuit board 28 and the length of the first straight line portion 58, the U-shaped portion 56, and the beam portion 54, and the length of the first electric path,
From the upper end 130 of the housing 11 to the second contact 36
Of the second straight line portion 78, the U-shaped portion 76, and the beam portion 74 together with the height B representing the distance of the tail portion 71 to the printed circuit board 28. The card connector is characterized in that the lengths of the electric paths are made equal.

Another feature is that each of the first contact 34 and the second contact 36 extends upward from the bases 50 and 70 branching from the beam portions 54 and 74. 62 and 82 are formed, and a recess 90 is formed in the lower portion of the slots 30 and 32 of the housing 11 so as to project from the slots 30 and 32 toward the side walls 12 and 14, and the stabilizing arms 62 and 82 fit therein. And the end portions 94 of the stabilizing arms 62 and 82 are hooked on the end portions 92 of the recesses 90 when a force is applied to the contacts 34 and 36 in the direction of pulling out from the slots 30 and 32. It is characterized by being.

[0010]

According to the above construction, by making the length of the first electric path of the first contact equal to the length of the second electric path of the second contact, signal distortion, timing deviation and the like can be prevented. Can be made smaller.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A card connector 10 of the present invention, as shown in FIG. 1, includes first and second parallel sidewalls 12 and 1.
4 and a housing 11 with a cavity 16 disposed therebetween. The cavity 16 receives the contact edge 18 of the card 20. Each of the sidewalls 12 and 14 of the housing 11 has a number of slots formed on the side of the cavity 16 for receiving contacts 34 and 36 which provide a mechanical and electrical connection between the contacts of the card 20 and the printed circuit board 28. 30 and 32.

More specifically, FIG. 1, FIG. 7 and FIG.
And side walls 12 and 14 of the housing 11 as shown in FIG.
Comprises a dividing wall 22 extending inwardly from each side wall 12 and 14 into the cavity 16 and having slots 30, 32.
Are formed between the adjacent dividing walls 22.

The upper surface 37 of each partition wall and the upper surface 3 of each end wall 40, 42 of the housing 11.
8, 39 are beveled to help the contact edge 18 of the card 20 be easily inserted into the cavity 16. The base 24 of the housing 11 is formed by a web 44 that connects the first side wall 12 and the second side wall 14 at the bottom, the web 44 forming the floor of the cavity 16. Also, the base 24 of the housing 11 contains a number of apertures 46 leading to the respective slots 30, 32 of the housing 11, wherein the first and second respective contacts 34 and 36 pass through the apertures 46 into their respective slots. It fits snugly into 30 and 32.

The first and second contacts 34 and 36 are flat contacts formed by stamping a conductive material. The first contact 34 includes a base 50,
A tail portion 52 extending downward from the base 50, a beam portion 54 extending upward from the base 50, a U-shaped portion 56 bent from the beam portion 54 in an inverted U-shape, and the U-shaped portion. 56, and a first straight line portion 58 that extends at an angle in a diagonally downward direction away from the beam portion 54, and an angle in a diagonal downward direction that is continuous with the first straight line portion 58 and approaches the beam portion 54. The apex between the attached and extended second straight line portion 59 and the first straight line portion 58 and the second straight line portion 59, and the cavity 16
And a contact point 60 that contacts the card 20 inserted in the cavity 16. The stabilizing arm 62 has a first
The contact 34 extends upward from the base 50 by a predetermined distance. A number of first contacts 34 are simultaneously formed during the sampling process, and the first contacts are
Separation part 6 separated by the tail part 52 of this first contact
4 is attached to the connector 10 and then separated.

As best seen in FIG. 7, the first
The beam portion 54 of the second contact 34 is stamped to have a wider morphology over most of its length when compared to the beam portion 74 of the second contact 36. If both the first contact 34 and the second contact 36 were stamped from a material of the same thickness and both were the same width, the contact portions 60 and 80 of their respective contacts would be on the card 20. I can't apply equal force.

It is desirable that both the first contact 34 and the second contact 36 exert equal force on the contacts of the card so that all contacts of the card 20 wear evenly and have equal resistance characteristics. It is done. The beam portion 54 is therefore made wider than the beam portion 74 of the second contact 36 so that it is stiffer per unit length. As a result, the contact points 60 and 80 of the first contact 34 and the second contact 36, respectively, exert an equally normal force on the card 20. Also, other beam shapes or materials of different thickness may alternatively be used to achieve the desired equal force characteristics.

Similarly, the second contact 36 includes a base 70 and a tail portion 71 extending downward from the base 70.
And a beam portion 74 extending upward from the base 70.
And a U-shaped portion 76 bent from this beam portion 74 in an inverted U-shape, and a first portion that is continuous with this U-shaped portion 76 and extends obliquely downwardly away from the beam portion 74. A straight line portion 78, a second straight line portion 79 which is continuous with the first straight line portion 78 and extends at an angle in an obliquely downward direction toward the beam portion 74, and the first straight line portion 78 and the second straight line portion 79. And a contact point 80 facing the cavity 16 and contacting the card 20 inserted in the cavity 16. Stabilizing arm 8
2 extends upward from the base 70 of the second contact 36 by a predetermined distance. During the stamping process, a large number of second contacts 36 are formed at the same time, and the second contacts 36 are the tails 71 of the second contacts 36.
The connector 10 is connected to the connector 10 with the separating portion 84 separated by the above, and then separated.

As seen in FIG. 8, the first contact 34 and the second contact 36 include a slot 3 in which the first contact 34 and the second contact 36 are disposed.
2 is disposed in the slot 30 adjacent to the second contact 36, and the second contact 36 is disposed in the slot 32 adjacent to the slot 30 in which the first contact 34 is disposed.
Receiving in alternating slots 30, 32 in each side wall 12, 14 of the housing 11. First contact 3
The slots 30 in the side wall 12 for receiving 4 are the slots 32 in the side wall 14 for receiving the second contact 36.
Further, they face each other in the width direction N with the cavity 16 interposed therebetween.

Similarly, the slot 32 in the side wall 12 including the second contact 36 faces the slot 30 in the side wall 14 receiving the longer contact 34 in the width direction N with the cavity 16 interposed therebetween. .

The first and second contacts 3 are arranged so that the first and second contacts 34 and 36 are alternately arranged so that they have different angles with respect to the base 24 of the housing 11.
Designing the beam portions 54,74 of 4,36 reduces crosstalk between lines.

Crosstalk occurs when the signal at one contact is superimposed on the signal at an adjacent contact. This polymerization is caused by inductance. Inductance can be minimized by keeping the metal contacts as far apart as possible. When it is not practical, as in this application, the area of the surface of the adjacent adjacent contact may be reduced. Such reduction is due to the first and second contacts 3
By alternately arranging 4, 36, also the beam portions 54, 74 of the first and second contacts 34, 36 are mutually,
And by designing to have different angles with respect to the base 24 of the housing 11.

Each contact 34, 36 is formed in the base 24 of the housing 11 such that the bases 50, 70 of the contacts 34, 36 are located between the respective side walls 12, 14 of the housing 11 and the web 44. Through the respective apertures 46,
It is pushed into 2. The bases 50, 70 of each of the contacts 34, 36 are outwardly fitted into the web 44 as they are snugly pushed into the slots 30, 32 to maintain the contacts 34, 36 fixedly in place. It contains extending protrusions 55, 75. Slot 3
Each of the side walls 12, 14 having the 0, 32 formed therein is formed with a recess 90 for receiving the respective stabilizing arm 62, 82 of the contact 34, 36. That is, the ends 94 of each recess 90 engage the ends 94 of the stabilizing arms 62, 82. And, the ends 92 of the recesses 90 resist pushing the contacts 34, 36 upward during insertion of the tails 52, 71 into their respective holes 96 formed in the printed circuit board 28. It is a thing. It can be seen that the length of the stabilizing arms 62 and 82 of the first and second contacts 34, 36 is the same as the length of the recess 90. This allows each slot 30, 32 to receive the first contact 34 or the second contact 36.

As seen in FIGS. 7 and 8, the stabilizing arms 62, 82 of each of the contacts 34, 36 are adjacent to each of the sidewalls 12, 14 forming the recess 90. The contact edge 18 of the card 20 is the housing 1
When inserted into the one cavity 16, the card 20 exerts a force at the contact points 60, 80 of the contacts 34, 36 perpendicular to the plane of the contact edge 18. Stabilizing arms 62 and 82 include bases 50 and 70 of contacts 34 and 36.
At the same time, the force applied from the card 20 is applied to the bases 50, 7
This force is counteracted via beam portions 54 and 74 so as to be distributed between zero and stabilizing arms 62 and 82. The force from the card 20 is transmitted not only through the bases 50 and 70 of the contacts 34 and 36, but also to the contacts 34 and 36.
The contacts 34, 36 are more durable and more stable within the slots 30, 32 of the housing 11 as they are distributed through the stabilizing arms 62, 82 of 36.

As shown in FIG. 2, the base 24 of the housing 11 has a first holding post 100 protruding from the base 24. The first holding post 100 fixes the housing 11 to the printed circuit board 28. Received in an aperture formed in the printed circuit board 28 to hold it in place. The housing 11 also has another aperture 102 for fixing the housing 11 to the printed circuit board 28 so as to hold the same.
The second retaining post 101 received in the base 24
It is formed so as to project from.

As shown in more detail in FIGS. 3 and 4, the second holding post 101 has a tubular shape having a cavity 107 along the longitudinal direction thereof, and a peripheral wall 124 of the second holding post 101 is formed. Along the longitudinal direction and above the cavity 1
07 has a slot 106 cut out so as to open. More specifically, the second holding post 101 is C
The mold has a cross section and the opening of the slot 106 is second.
It is opened about 40 degrees about the axis of the holding post 101. The root 128 of the second holding post 101 has an annular recess 1 formed in the base 24 of the housing 11.
08. Further, a pair of standoffs 110 and 112 are arranged in the width direction N with the second holding post 101 interposed therebetween,
Standoffs 114, 115 and 116, 118 are arranged on respective ends 120 and 122 of the housing 11 to form a mounting surface for mounting on the printed circuit board 28. The second holding post 101
The outer diameter of the aperture 102 of the printed circuit board 28 is
Larger than the diameter of. Also, the second holding post 101
Can be inserted by inserting the printed circuit board 28 into the aperture 102 by compressing the slot 106 so as to close. The second holding post 101 is inserted into the aperture 102 by being compressed so that the slot 106 is closed. Therefore, when the second holding post 101 is pulled out of the aperture 102, a frictional force is generated in a direction opposite to the pulling direction. It is configured. The peripheral wall 124 of the second holding post 101 deforms more easily at the tip portion 126 of the second holding post 101 than at the root portion 128. Standoff 11
0 and 112 indicate that when the second holding post 101 is pulled out from the aperture 102, the aperture 102 of the printed circuit board 28 ruptures the second holding post 101.
And to avoid destruction.

Further, the root portion 12 of the second holding post 101.
Due to the dents 108, the second holding post 101 is hard to come off from the aperture 102. Since the second holding post 101 needs to be extremely durable, the housing 1
In addition to the other materials that are integrally formed with 1, and may be made of robust and inexpensive polyphenylene sulfide (PPS). Further, in the tip portion 126 of the second holding post 101, the second holding post 101 has the aperture 10
2 is tapered to an outer diameter that is smaller than the diameter of the aperture 102 to aid in ease of insertion into the 2.

As shown with respect to FIG. 9, the heights of the contacts 34 and 36 suitable for use in the connector 10 are different, but from the upper end 130 of the housing 11 to the contact points 60, 80 of the respective contacts 34, 36. , And the length of the electrical path through the contacts 34, 36 to the printed circuit board is the same for both the first contact 34 and the second contact 36.
More specifically, the distance A from the upper end 130 of the housing 11 to the contact point 60 of the longer contact 34, plus,
The height H, which represents the distance of the tail portion 52 to the printed circuit board 28, and the lengths of the first straight portion 58, the U-shaped portion 56, and the beam portion 54 are determined by the contact between the upper end 130 of the housing 11 and the second contact 36. It is equal to the distance B to the point 80, plus the height H representing the distance of the tail 71 to the printed circuit board 28, and the length of the first straight portion 78, the U-shaped portion 76 and the beam portion 74. Since the electrical paths of the contacts 34 and 36 have the same length, signal distortion or signal timing deviation can be avoided.

As a result of the above description, various modifications and variations of the present invention are possible. Thus, it is understood that within the scope of the appended claims, the present invention may be practiced other than as described above.

[0029]

As described in detail above, according to the present invention, according to claim 1, the length of the first electric path of the first contact and the length of the second electric path of the second contact are made equal. As a result, it is possible to reduce the signal distortion, the timing shift, and the like, and it is easy to improve the signal exchange between the card and the printed circuit board.

According to the second aspect, when the tail portion of the contact is inserted into the hole of the printed circuit board,
It is possible to prevent the contact from being pushed upward in the direction opposite to the insertion direction by the end of the stabilizing arm of the contact being caught by the end of the dent, and preventing the contact from moving upward. it can. In addition, when inserting the card into the card connector, the force exerted by the card on the contacts is distributed not only via the base of the contacts, but also via the stabilizing arms of the contacts. This allows the contact to last longer and remain more stable in the housing slot.

[Brief description of drawings]

FIG. 1 is a perspective view of a card connector of the present invention represented with respect to a card and a printed circuit board.

2 is a partial perspective view of the bottom of the connector shown in FIG. 1. FIG.

3 is a cross-section of the connector taken along line 3-3 of FIG. 2 representing a second retention post of the present invention.

FIG. 4 is a partial bottom view of the connector showing the configuration of the second retention post shown in FIG.

FIG. 5 is a front view of a first contact formed during a stamping process.

FIG. 6 is a front view of a second contact formed during the stamping process.

FIG. 7 is a cross-sectional view depicting two slots of a housing, one slot having a first contact incorporated therein and the other slot having a second contact incorporated therein.

8 is a partial perspective view of a cross section of the connector shown in FIG. 1. FIG.

FIG. 9 is a diagram showing the length of an electrical path from the upper end of the housing through the respective first and second contacts to the printed circuit board.

[Explanation of symbols]

 11 Housing 12 First Side Wall 14 Second Side Wall 16 Cavity 20 Card 28 Printed Circuit Board 30, 32 Slot 34 First Contact 36 Second Contact 50 First Contact Base 52 First Contact Tail 54 First Beam portion of contact 56 U-shaped portion of first contact 58 First straight portion of first contact 59 Second straight portion of first contact 60 Contact point of first contact 70 Base of second contact 71 Second contact tail portion 74 Second contact beam portion 76 Second contact U-shaped portion 78 Second contact first straight portion 79 Second contact second straight portion 80 Second contact portion Contact point

Claims (2)

[Claims] 1. A cavity 16 into which a card 20 is inserted, side walls 12 and 14 located on both sides of the cavity 16, and a contact 3 formed on the side of the cavity 16 of the side walls 12 and 14.
Card connector 10 for mechanically / electrically connecting the card 20 and the printed circuit board 28 with the housing 11 having the slots 30, 32 for accommodating the cards 4, 36.
And the contacts 34, 36 are the base 50,
70, beam portions 54 and 74 extending above the bases 50 and 70, U-shaped portions 56 and 76 bent from the beam portions 54 and 74 in an inverted U-shape, and the U-shaped portions 56 and 76. And a first straight line portion 58, 78 extending obliquely downward from the beam portion 54, and the beam portion 54 continuous with the first straight line portion 58, 78.
Second straight line portion 59, 79 extending obliquely downward
And the first straight line portions 58, 78 and the second straight line portions 59,
79, which is the apex between 79 and faces the cavity 16,
A contact point 60 for contacting the card 20 inserted therein,
80 and the tail portion 5 extending below the bases 50 and 70
2 and 71, and a first contact 34 and a second contact 36.
Has its beam portion 54 longer than the beam portion 74 of the second contact 36, and the contact point 60 has a higher contact point 60 located higher than the contact point 80 of the second contact 36, The beam portion 74 of the second contact 36 has a beam portion 54 of the first contact 34.
Shorter than the first contact 34
In a card connector having a lower contact point 80 lower than the contact point 60 of FIG.
Reference numerals 4 and 36 denote housings 11 of the first contact 34.
Contact point 60 of the longer contact 34 from the upper end 130 of the
To the printed circuit board 28 and the height H, the first straight line portion 58 and the U-shaped portion 5
6 and the length of the beam portion 54, the length of the first electrical path, the distance B from the upper end 130 of the housing 11 to the contact point 80 of the second contact 36 and the printed circuit board 28 of the tail 71. A card connector, wherein a height H representing a distance and a length of a second electric path, which is a combination of the lengths of the first straight line portion 78, the U-shaped portion 76, and the beam portion 74, are made equal. 2. Each of the first contact 34 and the second contact 36 is formed with stabilizing arms 62, 82 that branch from the bases 50, 70 into beam portions 54, 74 and extend upward. Together with the housing 1
In the lower part of the slots 30 and 32,
2 is convex toward the side walls 12 and 14 and has a dent 90 into which the stabilizing arms 62 and 82 are fitted,
When a force is applied to the contacts 34, 36 in the direction of pulling out from the slots 30, 32, the stabilizing arm 6
2. The card connector according to claim 1, wherein the ends 94 of the second and second parts 82 are adapted to be hooked on the ends 92 of the recess 90.