JP2000311736A - Surface mount connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface mounting connector having little occurrence of crosstalk of a signal between adjacent contacts and capable of speedily transmitting the signal. SOLUTION: A contact 2 ranged and held by a contact body 10 is surface- mounted to a mount pattern on a printed board by soldering in this connector. Each contact 2 is composed of a contact body 20 having a contact part 23a on one end side and a mount part 21a on the other end side, an insulating layer of an insulating material to cover the outer periphery of the insulating layer except the contact part and the mount part, and a conductive layer to cover the outer periphery of the insulating layer. The mount part 21a is soldered to the mount pattern 43 on the surface of the printed circuit board 40 and the connector 1 is surface-mounted to the printed board 40 by soldering a ground mount layer to a ground mount pattern 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector constructed by aligning and holding a plurality of contacts by a connector body made of an insulating material, and furthermore, soldering each contact to a mount pattern formed on the surface of a printed circuit board. Bonding and surface mounting on printed circuit board (surface mounting)
Related to surface mount connectors.

[0002]

2. Description of the Related Art As a connector having the above-described contacts, a receptacle connector 501 and a plug connector 505 configured as shown in FIG. 8 are conventionally known. These connectors 501 and 505 are fitted to each other to form a receptacle contact 502 provided in alignment with the receptacle connector 501 and a plug contact 506 provided in alignment with the plug connector 505.
Are brought into contact at the contact portions 503 and 507 to be electrically connected. The contacts 501, 5
Reference numeral 05 denotes a surface of the mounting portions 504 and 508 which are soldered to a mounting pattern of a printed board.

In such a contact connection between the contacts 502 and 506, it is required that the contact contact pressure be equal to or higher than a predetermined pressure in order to secure connection reliability. In this example, the receptacle contact 502 is replaced with the plug contact 506. The contact pressure is obtained by the elastic force when elastically deformed so as to be pushed outward and expanded outward. In order to stably secure such elastic contact force, it is preferable that a height of the receptacle contact 502 projecting upward is a predetermined height. In addition, it is necessary to secure a contact allowance necessary for fitting and connecting the two contacts. From this point as well, the projecting height of the receptacle contact 502 and the projecting length of the plug contact 506 are set to predetermined values. Is set to be

In addition, such a receptacle connector 5
01 and the plug connector 505, a plurality of (many) receptacles and plug contacts 502, 5
06 are aligned and held by the connector body, so that multi-pole signal transmission is possible. In recent years, the demand for such multi-polarization has been increasing, and at the same time, the demand for downsizing the connector has also increased.

[0005]

In view of the above requirements, a structure in which the contacts are thinned and arranged at a narrow pitch in the connector has been adopted. It is necessary to secure the contact height to a certain degree or more from the demand for securing the contact margin, and there is a tendency that a thin and long contact is used. However, when such thin and long contacts are arranged at a narrow pitch, there is a problem that crosstalk is likely to occur particularly at the time of high-speed signal transmission, and the high-speed signal transmission characteristics deteriorate.

In order to prevent crosstalk and improve the high-speed signal transmission characteristics, for example, some of the aligned contacts are connected to the ground, and the contact between the contacts thus grounded is connected. A configuration in which a signal transmission contact is provided in a conventional device has been used. By doing so, there is no risk of crosstalk and high-speed transmission of signals is possible, but since a contact connected to ground cannot be used for signals,
There is a problem that much more contacts are required than the required number of signals and the connector becomes large.

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and a surface mount contact capable of reducing the occurrence of signal crosstalk between adjacent contacts and enabling high-speed signal transmission is provided. The purpose is to provide.

[0008]

In order to achieve the object, according to the present invention, a plurality of contacts are aligned and held by a connector body made of an insulating material, and the contacts are mounted on a mount pattern formed on the surface of a printed circuit board. A surface mount connector is configured to be surface-mounted on a printed circuit board by soldering, and each of these contacts has a contact portion on one end side that abuts a mating contact and is soldered to a mounting pattern of the printed circuit board on the other end side. A contact body having a mount portion to be joined, an insulating layer made of an insulating material formed to cover at least the outer periphery of the contact body except the contact portion and the mount portion, and formed to cover the outer periphery of the insulating layer. And a conductive layer made of a conductive material. Further, a ground pattern is formed on the surface of the printed circuit board, and the mounting portion is solder-bonded to the mount pattern, and the conductive layer is solder-bonded to the ground pattern to be surface-mounted on the printed circuit board. .

In the case of the surface mount connector having such a configuration, the mount portion of each contact is soldered to the mount pattern and the conductive layer is grounded by using a surface mount method generally used conventionally. The connector according to the present invention can be mounted on a printed circuit board, that is, surface-mounted by soldering and joining to a pattern. In such a surface-mounted state, the conductive layer of each contact is soldered to the ground pattern and connected to the ground, so that even if a plurality of contacts are arranged at a narrow pitch in the connector body, the conductive layer Prevents signal crosstalk between adjacent contacts, thereby enabling high-speed transmission of signals through each contact. Further, since the conductive layer of each contact is directly connected to the ground, the effect of stabilizing the signal transmission characteristics of each contact is obtained.

In the surface mount, for example, cream solder is screen-printed on the surface of the mount pattern and the ground pattern of the substrate, and the mount portion of each contact and the lower surface of the conductive layer are brought into contact with the cream solder. The connector of the present invention is mounted on a substrate, and in this state, the whole is heated in the harness to melt the solder. Therefore, the joining between the mount pattern and the mounting portion and the joining between the ground pattern and the conductive layer can be performed at the same time, and the surface mounting operation is simple.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the connector according to the present invention will be described below with reference to the drawings. First, FIG. 1 shows a surface mount type receptacle connector 1 according to the present invention, and FIG. 2 shows a surface mount type plug connector 5 according to the present invention, which will be described.

The receptacle connector 1 is formed by insert molding or the like by aligning and holding a plurality of receptacle contacts 2 by a receptacle connector body 10. The plug connector 5 is configured by aligning and holding a plurality of plug contacts 6 by a plug connector body 50 made of an insulating material, and the plug contacts 6 are also held by the connector body 50 by insert molding or the like.

The receptacle contact 2 includes a contact body 20 and a shield member 30, and has a substantially L-shape when viewed from the side. Contact body 2
Reference numeral 0 denotes a connection leg 2 which is formed of a conductive material and extends left and right on the lower surface of the receptacle connector body 10.
1, a contact arm 23 which is bent at a right angle at the inner end of the connection leg 21 and extends upward, and projects into the receptacle space 13 of the receptacle connector body 10, and a contact formed at the tip of the contact arm 23. 23a.

The connection leg 21 has a distal end portion at the connector body 1.
The left and right side end surfaces 11a of the O. 0 protrude laterally and slightly downward to form a mount portion 21a, and the middle portion protrudes downward to form a protruding portion 21b. The contact arm portion 23 has a spring property that allows outward bending and elastic deformation. The contact portion 23a is formed to be curved inward, and is in contact with a plug connector 5 described later. It comes into contact and is electrically connected.

The contact body 20 thus formed
A shield member 30 is attached to the outer periphery of the intermediate portion (the portion excluding the mount portion 21a and the contact portion 23a).
As shown in detail in FIG. 4, the shield member 30 is an insulating layer 31 made of ceramic or plastic having electrical insulating properties, which is deposited or coated on the outer periphery of the contact body 20, and is plated on the outer periphery of the insulating layer 31. The conductive layer 32 is made of gold, nickel, or the like. In the contact 2, when the width W of the contact body 20 is about 0.4 mm, for example, the thickness t1 of the insulating layer 31 is 2 to 10 mm.
μm, and the thickness t2 of the conductive layer 32 is 0.1 to 2 μm.
Set to about. Since the shield member 30 is also attached to the outer peripheral portion of the projecting portion 21b formed on the connection leg portion 21 of the contact main body 20, the shield member 30 also projects downward on the lower surface side of the projecting portion 21b, and is grounded. A layer 35 is formed.

The plurality of receptacle contacts 2 configured as described above are insert-molded and aligned and held by the receptacle connector body 10, thereby forming the receptacle connector 1. The receptacle connector body 10 is made by molding a resin or the like having an insulating property.
It has a rectangular plate-shaped base 11 and an outer wall 12 formed on the base 11 and extending upward in a rectangular box shape. Therefore, a receptacle space 13 which is surrounded by the outer wall portion 12 and opened upward is formed on the upper surface side of the base portion 11.
As described above, the contact arm 23 of the receptacle contact 2 stands up and protrudes into the receptacle space 13. Receptacle contact 2 is connected to receptacle connector body 1
0, the contact portions 23a are arranged in two rows.
Are located in the receptacle space 13 in two rows.

Receptacle connector 1 having such a configuration
Is surface-mounted and attached to the printed circuit board 40. A plurality of mounting patterns 43 and ground patterns 42 arranged in pairs on the left and right
Are formed in a row. These mount patterns 4
The ground pattern 3 and the ground pattern 42 are formed corresponding to the positions of the mount portion 21 a of the receptacle connector 1 and the ground mount layer 35. In the substrate 40, the mount pattern 43 is connected to the signal wiring pattern, and the ground pattern 42 is grounded (grounded).

As shown in FIG. 3, a pair of left and right cylindrical positioning projections 15 are formed on the lower surface of the base 11 of the receptacle connector body 10 so as to protrude downward. 45 are formed. When the positioning connector 15 is inserted into the positioning hole 45 and the receptacle connector 1 is disposed on the upper surface of the substrate 40, the mounting portion 21a
3 and a ground mount layer 35 at the same time.
Are placed in contact with the ground pattern 42.

For this reason, the lower surface of the mounting portion 21a and the ground mounting layer 35 or the mounting pattern 4
After the solder connector is mounted on the substrate 40 as described above in a state where the cream solder is applied in advance on the upper surfaces of the ground pattern 42 and the ground pattern 42, after the solder connector is heated in the harness to melt the cream solder When cooled, the mount portion 21a is soldered to the mount pattern 43, and the ground mount layer 35 is soldered to the ground pattern 42.
Can be surface-mounted on the substrate 41.

Next, the plug connector 5 to be fitted with the receptacle connector 1 configured as described above will be described with reference to FIG.
This will be described with reference to FIG. The plug connector 5 is configured by holding a plurality of plug contacts 6 in two rows on a plug connector body 50 made of an insulating material. The plug connector body 50 has a bottom wall portion 51, left and right outer wall portions 52, and a central plug contact holding portion 54, and a plug space 53 that is surrounded and opened downward is formed.

The plug contact 6 comprises a contact body 6
0 and the shield member 70, and the shape in a side view is formed substantially in an L-shape. The contact body 60 is formed of a conductive material, and extends right and left on the upper surface of the plug connector body 50. The connection leg 61 is bent at a right angle at the inner end of the connection leg 61 and extends downward. The contact arm 63 includes a contact arm 63 protruding into the plug space 53 and a contact 63 a formed at the tip of the contact arm 63.

The connection leg 61 has a distal end portion at the connector body 5.
0 protrudes laterally from the left and right end surfaces and slightly upwards to form a mount portion 61a.
The intermediate portion protrudes upward to form a protruding portion 61b.
Further, the contact arm 63 is provided with the plug contact holding portion 54.
And the contact portion 23 of the receptacle contact 20 when it is fitted with the receptacle connector 1.
a and is electrically connected.

The contact body 60 thus formed
A shield member 70 is attached to the outer periphery of the intermediate portion (the portion excluding the mount portion 61a and the contact portion 63a).
The shield member 70 has the same configuration as the shield member 30 of the contact 2 of the receptacle connector 1, and has an electrically insulating insulating layer deposited or coated on the outer periphery of the contact body 60 as shown in detail in FIG. 71 and a conductive layer 72 formed on the outer periphery of the insulating layer 71
Consists of Since the shield member 70 is also attached to the outer peripheral portion of the protrusion 61 b formed on the connection leg 61 of the contact body 60, the shield member 70 also protrudes downward on the lower surface side of the protrusion 61 b and the ground mount layer 7.
5 are formed.

The plurality of plug contacts 6 thus configured are aligned and held by the plug connector body 50, and the plug connector 5 is configured. In this state, the contact arm 63 of each plug contact 6 is
The plug contacts 6 are arranged in two rows in the plug connector body 50, and the contact portions 63 a are located in the plug space 53 in two rows.

The plug connector 5 having such a configuration is surface-mounted and attached to a printed circuit board (not shown), like the receptacle connector 1. Similarly to the board 40 shown in FIG. 1, a plurality of mount patterns and ground patterns arranged in pairs on the left and right are formed in a row on this printed board, and the mount patterns are connected to the signal wiring patterns. The ground pattern is grounded (grounded). Then, the plug connector 5 is disposed on the upper surface of the substrate, and the mount portion 61a is soldered to the mount pattern, and at the same time, the ground mount layer 75 is formed.
Is soldered on the ground pattern, and the plug connector 5 is surface-mounted on the printed circuit board.

When the connectors 1 and 5 configured as described above are fitted together, the contact portions 23a and 6
The contacts 3a are in contact with each other, the two contacts 2 and 6 are connected, and a signal is transmitted. At this time, in the receptacle contact 2 and the plug contact 6, the outer periphery of the intermediate portion is covered by the shield members 30, 70, and the conductive layers 32, 72 formed on the outermost periphery of the shield members 30, 70 are ground mounts. The layers 35 and 75 are soldered to the ground pattern. For this reason, the shield members 30 and 70 prevent crosstalk between the adjacent receptacle contacts 2 and plug contacts 6, and high-speed signal transmission can be performed without the problem of crosstalk.

In the above embodiment, the insulating layers 31 and 71 and the conductive layer 3 forming the shield members 30 and 70 are used.
2,72 are coated on the contact bodies 20,60,
Although formed by plating or the like, the present invention is not limited to such a configuration, and a shield member may be provided by covering the outer periphery of the contact body with a film. For example, as shown in FIG. 5 and FIG.
30 so that the contact body 120
May be formed.

The film-shaped shield member 130 is made of an insulating film 131 having electrical insulation such as a polyimide tape.
And a conductive film 132 such as an aluminum or copper film fixed to one surface of the insulating film 131. Then, the contact main body 12 is positioned such that the surface of the insulating film 131 is located on the contact main body 120 side.
0 is adhered by bonding or the like in a state where 0 is sandwiched between the two film-shaped shield members 130.

As a result, the film-shaped shield member 130 can be firmly adhered to the outer periphery of the contact body 120.
120, the film-shaped shield member 130 located between
130 can also be firmly adhered. Therefore, the thus configured receptacle contact 10
If the receptacle connector is formed by insert-molding 2 into a receptacle connector body, the connector can be easily manufactured.

The film-like shield member 130 in which the conductive film 132 is fixed to the surface of the insulating film 131
, The insulating film and the conductive film may be separately adhered to each other. In this case, the outer periphery of the contact body is sandwiched and adhered by two insulating films, and then the outer periphery of the contact body to which the insulating film is adhered is sandwiched and adhered by two conductive films. A shield member is formed.

In the receptacle connector 1 and the like configured as described above, the thickness of the shield member 30 is at most about 12 μm, and when the film-like shield member 130 is used, the thickness is 0.1 mm. 02-0.03m
m is desirable. Therefore, compared with the conventional receptacle contact, the receptacle contacts 2, 102
Since the increase in the size is small, the receptacle connector 1 and the like can be formed with the same configuration as the conventional receptacle connector.

For this reason, the receptacle connector body 1
The shape of the receptacle contact holding hole 15 and the like at 0 and the like need only be slightly changed from the shape and size of the conventional receptacle contact holding hole, and the receptacle connector 1 and the like can be easily manufactured.

A surface mount connector according to another embodiment of the present invention will be described with reference to FIG. FIG. 2 shows a surface mount type receptacle connector 201 and a plug connector 205. The receptacle connector 201 is configured by aligning and holding a plurality of receptacle contacts 202 by a receptacle connector body 210, and the plug connector 205 is configured by aligning and holding a plurality of plug contacts 206 by a plug connector body 250 made of an insulating material.

The receptacle contact 202 comprises a contact body 220 made of a conductive material and a shield member 230. The contact body 220 is connected to the connection leg 2 extending left and right on the lower surface side of the receptacle connector body 210.
21, and bent upward at an inner end portion of the connection leg portion 221 to extend upward to form the receptacle connector body 210.
And a contact arm portion 223 projecting into the receptacle space. At the tip of the connection leg 221, a mount part 221 a to be surface-mounted on the substrate is formed, and at the tip of the contact arm part 223, a contact part 223 a is formed.

A shield member 230 is attached to the outer periphery of the contact body 220.
Reference numeral 30 has the same configuration as the aforementioned seal member 30 shown in FIG. The shield member 230 is provided so as to cover the outer periphery of the contact body 220 except for the contact part 223a and the mount part 221a. The contact body 220
Since the intermediate portion of the connection leg portion 221 projects downward,
The shield member 230 also has a ground mount portion 235 protruding from the lower surface side, and the ground mount portion 235 is surface-mounted on the ground pattern of the substrate.

The plug contact 206 comprises a contact body 260 made of a conductive material and a shield member 270, and has a substantially L-shape when viewed from the side.
The contact body 260 is a plug connector body 250
And a contact arm 263 which is bent at a right angle at the inner end of the connection leg 261 and extends downward, and protrudes into the plug space of the plug connector body 250. Become. Connection leg 26
A mount part 261a to be surface-mounted on the substrate is formed at one end, and a projection part 263a is formed at a front end of the contact arm part 263. The contact arm 263 is elastically deformable.

A shield member 270 is attached to the outer periphery of the contact main body 260. This shield member 27
Reference numeral 0 is provided so as to cover the outer periphery of the contact main body 220 except for the contact surface 263b on the middle outside of the contact arm portion 263 and the mount portion 261a. The protruding portion 263a is also covered by the shield member 270, and the shield contact portion 276
Is formed. Since the intermediate portion of the connection leg 261 of the contact main body 260 protrudes upward, the shield member 270 also protrudes to the upper surface side and the ground mount 275.
Are formed, and the ground mount portion 275 is surface-mounted on the ground pattern of the substrate.

[0038] The two connectors 201,
205 is fitted, the receptacle contact 202
Contact portion 223 a of the contact surface 2 of the plug contact 206
The contact bodies 220 and 260 of the contacts 202 and 206 are electrically connected to each other by contacting the contact 63b. Also, the shield contact portion 276 of the plug contact 206
However, the contact arm 22 of the receptacle contact 202 is not
3 is in contact with the shield member 230 covering the cover 3. Therefore, the conductive layers of the shield members 230 and 270 are in contact with each other and are electrically connected. That is, the connectors 201 and 201
05, the corresponding contact body 220,
260 are connected to each other, and
The conductive layers 30 and 270 are connected to each other.

[0039]

As described above, in the case of the surface mount contact according to the present invention, the mount portion of each contact is soldered to the mount pattern by using the surface mount method generally used conventionally. At the same time, the conductive layer can be soldered and joined to the ground pattern to be easily mounted on the printed circuit board, that is, surface mounted.

In such a surface-mounted state, the conductive layers of the respective contacts are soldered to the ground patterns and connected to the ground, so that even when a plurality of contacts are arranged at a narrow pitch in the connector body. Since the conductive layer prevents signal crosstalk between adjacent contacts, high-speed transmission of signals through each contact is possible. Further, since the conductive layer of each contact is directly connected to the ground, the effect of stabilizing the signal transmission characteristics of each contact is obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a receptacle connector as a surface mount connector according to the present invention.

FIG. 2 is a perspective view showing a plug connector as a surface mount connector according to the present invention.

FIG. 3 is a front view showing a state where the receptacle is surface-mounted on a printed circuit board.

FIG. 4 is an enlarged sectional view showing a part of a contact constituting the connector according to the present invention.

FIG. 5 is a perspective view showing a part of a different configuration of a contact constituting the connector according to the present invention.

FIG. 6 is an enlarged view of the contact as viewed from the arrow VIII.

FIG. 7 is a sectional view showing another embodiment of the surface mount connector according to the present invention.

FIG. 8 is a sectional view of a conventional receptacle and plug connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Receptacle connector 2,102 Receptacle contact 5 Plug connector 6 Plug contact 10 Receptacle connector body 20 Receptacle contact body 50 Plug connector body 60 Plug contact body 30, 70 Shielding member

Continued on the front page (72) Inventor Yasuhiro Ono 6-17-7 Nagayama, Tama-shi, Tokyo Kell Stock Company In-house F-term (reference) 5E023 BB01 CC26 EE04 FF01 GG13 HH11

Claims (1)

[Claims] A plurality of contacts are arranged and held by a connector body made of an insulating material, and the contacts are solder-bonded to a mount pattern formed on a surface of a printed circuit board to be surface-mounted on the printed circuit board. In the surface mount connector according to the above, the contact has a contact portion on one end side to be in contact with a mating contact and a mount portion on the other end side to be soldered to the mount pattern of the printed circuit board. A body, an insulating layer made of an insulating material formed over the outer periphery of the contact body except at least the contact portion and the mount portion, and a conductive layer made of a conductive material formed over the outer periphery of the insulating layer. A ground pattern is formed on the surface of the printed circuit board, A surface mount connector, wherein the mount portion is soldered to the mount pattern and the conductive layer is soldered to the ground pattern to be surface-mounted on the printed circuit board.