JPH0765916A - Connector and printed circuit board connecting structure using connector - Google Patents

Abstract

PURPOSE:To provide a connector assuring stable connections and a printed circuit board connecting structure using the connector. CONSTITUTION:A connector includes a clip member 3 in a box 2 and having resilience and electroconductivity, and the clip member 3 is equipped with a base end 4 provided alongside the inner surface of the box and a pinching part 5 which is so structured that the two ends of the base end 4 are bent inward to the box bottom and the tips of the bends are extended straight and parallel with each other. The wiring pattern 25 is extended to the end of the base board 22, and a connection aid member positioned alongside the base board and put in electric continuity to the wiring pattern 25 is installed on the other surface of the end part of base board 22, and upon contacting a lead frame 21 with the extension part of the pattern 25, the two are pinched and secured by the connector 30 so that the connection is generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for sandwiching and connecting the tips of a plurality of members to be connected, and a printed wiring board for connecting a terminal-shaped member to be connected to a wiring pattern of the printed wiring board using the connector. Regarding connection structure.

[0002]

2. Description of the Related Art Generally, a three-dimensional circuit component 100 shown in FIG.
Like the lead frame 10 mounted on the base 101.
2 is connected to the lead terminal 104 of the electronic component 103, the electronic component 10 is made to protrude from the back surface of the base 101 together.
The tip ends of the lead terminals 104 and the lead frame 102 of No. 3 are connected via the connector 105.

Conventionally, as a connector 105 for making such a connection, there is one shown in FIG. This connector 1
Reference numeral 05 includes a clip member 106 and a box body 107 made of an insulating resin for housing the clip member 106. The clip member 106 is formed by bending a conductive flat plate into a substantially triangular shape, and is provided with curved portions 108 formed by curving both end portions thereof in an arc shape toward the outside. , 108, the lead terminal 104 and the lead frame 102 are inserted and sandwiched to connect the two.

On the other hand, conventionally, as in the circuit unit 120 shown in FIG. 8, the lead frame 122 disposed on the base 121 is connected to the wiring pattern 12 on the printed circuit board 123.
4 is connected to the lead frame 1 after inserting the tip of the lead frame 122 into the insertion hole 125 formed on the wiring pattern 124 of the printed wiring board 123.
The tip of 22 is soldered to the wiring pattern 124 to connect them.

[0005]

However, each of the above-mentioned conventional examples has a problem that the connection is unstable. That is, the lead frame 102 is connected to the electronic component 103.
In the first conventional example in which the lead terminal 104 and the lead frame 102 are connected to each other,
The lead terminal 104 and the lead frame 102 do not come into line contact with the clip member 106 in order to sandwich the
The contact area between the two was small. Therefore, there is no particular problem when a small current is applied as in the case of transmitting a signal, but when a large current of 10 A or more is applied as when connecting a power transistor, the contact resistance becomes large and the connection becomes unstable. In addition, the contact resistance caused excessive heat generation.

Further, in the second conventional example in which the lead frame 122 is connected to the printed circuit board 123, the soldered portion has low strength against external stress, and when external stress is applied, solder cracks and pattern peeling occur. The connection was unstable due to problems such as. Further, since the connection is made by soldering, there is a problem that the printed wiring board 123 and the lead frame 122 cannot be easily separated even if they are separated for repair or the like.

Therefore, an object of the present invention is to provide a connector capable of stable connection and a printed wiring board connecting structure using the connector.

[0008]

In order to achieve such an object, according to the first aspect of the present invention, a box body having an open side has a connector for sandwiching a plurality of members to be connected and connecting them to each other. And a clip member having elasticity and conductivity housed in the box, the clip member having a base end portion arranged in a U shape along the inner surface of the box, and a base member. Both ends of the end portion are bent inward toward the bottom of the box body, and a holding portion for holding the connected member is formed by extending both bent tip portions linearly and in parallel with each other.

In the second aspect of the invention, there is provided a printed wiring board connection structure for connecting a terminal-shaped member to be connected to a wiring pattern formed on one surface side of the printed wiring board by the connector, wherein the wiring pattern is printed. In addition to extending to the end of the wiring board, a connection auxiliary member is provided on the other side of the end of the board along the printed wiring board and in continuity with the wiring pattern, and the terminal-like connected member extends the wiring pattern. The two parts were brought into contact with each other and sandwiched and fixed by the above connector to be connected to each other.

[0010]

According to the first aspect of the invention, since the clip member of the connector comes into contact with the connected member through the sandwiching portions which are linearly arranged in parallel with each other, the clip member and the connected member are in face contact with each other. However, a sufficient contact area can be obtained between the two in order to obtain conduction.

According to the second aspect of the invention, since the connection is made by sandwiching the connector, even if an external stress is applied to the connection site, a connection failure such as a crack or a pattern separation does not occur.

Since the terminal-shaped member to be connected is usually made of a hard metal plate such as a copper plate, it is hardly deformed even if it is clamped by the connector, and it is directly connected to the wiring pattern. There is no continuity.
However, since the clip member of the connector is elastically pressed and connected to the connection assisting member and the terminal-shaped connected member connected to the wiring pattern, the wiring pattern is securely connected via the connection assisting member and the connector. The terminal-like connected member is connected to.

Further, since the end portion of the printed wiring board and the terminal-like connected member are sandwiched and fixed by the clip member having the spring property and the conductivity, the connection between them can be easily released only by removing the clip member.

[0014]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a sectional view showing the structure of a connector according to the first embodiment of the present invention, which is shown in FIGS.
In the three-dimensional circuit component 100, as in the first conventional example shown in FIG. 1, it is used as a connecting member that connects the lead terminal 104 of the electronic component 103 and the lead frame 102.

The connector 1 has a box body 2 made of an insulating resin, one surface of which is open, and a clip member 3 housed in the box body 2.
It has and. The clip member 3 is formed by bending and molding a flat plate having elasticity and conductivity, such as a phosphor bronze flat plate, and a base end portion 4 arranged in a U shape along the inner surface of the box body 2. The box body 2 is provided with sandwiching portions 5 and 5 formed by bending both ends of the base end portion 4 located near the open surface 2a inwardly toward the box body bottom surface 2b. The tip portions 5a, 5a of the holding portions 5, 5 are linear, that is, flat, and parallel to each other, and the box bottom 2
It is arranged in a direction orthogonal to b. In addition, a gap is formed between the tip portions 5a, 5a to such an extent that the member to be clamped (in this embodiment, the lead terminal 104 and the lead frame 102) can be elastically clamped. Further, a curved portion 6 that elastically receives the tip portion 5a is provided at the tip of the tip portion 5a. The clip member 3 configured as described above is housed in the box body 2, and a protrusion 7 for preventing the clip member 3 from coming out is formed on the open surface 2a side of the inner surface of the box body 2.

Next, the electronic component 103 using this connector 1
The connection between the lead frame 102 and the lead frame 102 will be described. Although not shown in FIG. 1, the electronic component 10 and the lead frame 102 are preliminarily attached to the three-dimensional circuit component 100 shown in FIG.

As shown in FIG. 1, the connector 1 is inserted into the ends of the lead terminal 104 and the lead frame 102 which are in a state of being superposed on each other. The connector 1 is inserted from the open surface 2a side of the box body 2. Then, the lead terminal 104 and the lead frame 102 enter into the gap of the holding portion 5, and are sandwiched between the holding portions 5 and 5 by the elastic restoring force of the clip member 3 to be fixed in the connector 1 and electrically connected to each other. Will be connected. At this time, the flat plate-shaped tip portion 5a is connected to the lead terminal 104 or the lead frame 1.
Since 02 is sandwiched, the clip member 3 comes into surface contact with the lead terminals 104 and the lead frame 102, and a contact area sufficient to establish conduction between them is obtained. Therefore, even if a large current of 10 A is applied to the electronic component 103, there is no inconvenience that a large amount of heat is generated by the contact resistance at the connection portion of the connector 1.

A bending portion 6 is formed at the tip of the nipping portion tip portion 5a for connecting and fixing the lead terminal 104 and the lead frame 102, while a bending portion is also formed between the nipping portion 5 and the base end portion 4. 8 is formed, the holding portion 5 is elastically received by the curved portion 6 and the bent portion 8, so that the holding portion 5 is in a stable state.
04 and the lead frame 102 are brought into surface contact.

Next, a second embodiment of the present invention will be described. This embodiment is an embodiment of a structure in which a terminal-shaped member to be connected is connected to a printed wiring board, and in this embodiment, as shown in FIG. 2, the connecting portions of the three-dimensional circuit component 20 are connected.

This three-dimensional circuit component 20 comprises a printed wiring board 22 on which an electronic component 23 such as a small current transistor, a small electrolytic capacitor, and a small resistor is mounted, and a lead frame 21 to which an electronic component 24 such as a large electrolytic capacitor is fixedly connected. ing. The printed wiring board 22 has the electronic components 23, ... Mounted on the front surface 22a thereof, while the wiring pattern 25 electrically connected to the electronic components 23 is formed on the back surface 22b of the substrate. The wiring pattern 25 extends to the end of the printed wiring board 22 and extends to a portion 25a.
Is equipped with. A connection auxiliary member 26 made of a U-shaped jumper wire is connected to the extending portion 25a. The connection auxiliary member 26 faces the extending portion 25a of the wiring pattern 25, and is a contact portion 26a provided on the surface 22a side of the substrate end portion.
And a connecting portion 26b formed by bending both ends of the contact portion 26a. The tip of the connecting portion 26b penetrating the printed wiring board 22 and protruding toward the back surface 22b of the board is soldered to the wiring pattern 25. By attaching, the connection auxiliary member 26 is connected to the wiring pattern 25.

The lead frame 21 is made of a hard metal plate such as a copper plate and is provided in a base 27 made of an insulating resin. The base 27 has an L-shape including a base 27a and a bent end 27b that is bent 90 degrees from the base, and one end of the lead frame 21 projects outward from the bent end 27b. The protruding tip portion 21a of the lead frame 21 is bent 90 degrees outward so as to be parallel to the base portion 27a. An electronic component 24 is provided at the center of the base 27a. The electronic component 24 is attached with its lead terminal 24a penetrating the base 27a.
On the other hand, the other end of the lead frame 21 also protrudes from the center of the base portion 27a to the outside of the base portion 27a along the lead terminal 24a, and the lead terminal 24a and the lead frame 21 are connected by the connector 28 on the outside of the base portion 27a. ing. The connector 28 has the same shape as the connector 1 described in the first embodiment, and the description of its internal structure is omitted.

The lead frame 21 configured as described above
And the wiring pattern 25 of the printed wiring board 22 are connected by a connector 30 having a clip member 31. That is, the protruding tip portion 21 a of the lead frame 21
Is in contact with the extended portion 25a of the wiring pattern 25. The protruding tip portion 21a and the extending portion 25a are connected to each other by the connector 3
The lead frame 21 is connected to the wiring pattern 25 by being sandwiched by 0s. This connector 30 is configured as follows.

The connector 30 basically has the same structure as the connector 1 of the above-described embodiment. That is, the connector 30 includes a box body 32 made of an insulating resin, one surface of which is open, and the box member 33 houses the clip member 31. The clip member 31 is formed by bending a flat plate having elasticity and conductivity such as a flat plate of phosphor bronze, and has a base end portion 33 arranged in a U shape along the inner surface of the box body 32. , The open surface 32a of the box 32
Clamping portions 34, 34 formed by bending both ends of the proximal end portion 33 located close to each other inward toward the box bottom surface 32b.
It has and. Then, the tip portion 3 of the sandwiching portions 34, 34
4a and 34a are linear and parallel to each other,
It is arranged in a direction orthogonal to the box bottom surface 32b. A gap is formed between the tip portions 34a, 34a to such an extent that the connected member to be clamped (in this embodiment, the connection assisting member 26, the printed wiring board 22, and the lead frame 25) can be elastically clamped. There is. Further, a curved portion 35 that elastically receives the holding portion 34 is provided at the tip of the tip portion 34a.

The connector 30 thus constructed connects the lead frame 21 and the printed wiring board 22 by elastically sandwiching the end portions of the lead frame 21 and the printed wiring board 22 in the gap of the sandwiching portion 34.
At this time, since the lead frame 21 is made of a hard metal plate such as a copper plate, the extension portion 21a of the lead frame 21 that is in direct contact with the wiring pattern 25 is almost no matter how much it is sandwiched by the connector 30. It is not deformed and is not sufficiently connected to the wiring pattern 25. Further, there is a soldering portion for connecting the connection assisting member 26 to the wiring pattern 25 on the wiring pattern 25, and it is hard to say that the soldering portion interferes with and a sufficient connection can be obtained. . However, the wiring pattern 2
The contact portion 26a of the connection assisting member 26 connected to 5 is pressed against one of the sandwiching portions 34 of the clip member 31 on the front surface 22a side of the printed wiring board 22 to be connected thereto. This connection provides sufficient conduction for the clip member 31 to elastically deform. In the clip member 31 connected to the wiring pattern 25 in this manner, the other holding portion 34 has the protruding tip portion 21 a of the lead frame 21.
It is connected to the lead frame 21 by being pressed into contact with. Also in this connection, sufficient conduction can be obtained because the clip member 31 is elastically deformed. Furthermore, for repair or the like, the lead frame 21 and the printed wiring board 22 are
Even in the case of disconnecting the connection with, the connection between both can be released by simply removing the connector 30.

In this embodiment as well, a curved portion 35 is formed at the tip of the holding portion tip portion 34a for holding and fixing the printed wiring board 22 and the lead frame 21, while the holding portion 34 and the base end portion 33 are formed. Since the bent portion 36 is also formed between the clip member 31 and the connection assisting member, the holding portion 34 is elastically received by the curved portion 35 and the bent portion 36. Three
6 and the clip member 31 and the lead frame 21 can be connected.

Further, in FIG. 2, reference numeral 37 is an auxiliary base which is interposed between the printed wiring board 22 and the base 27 at the end of the printed wiring board 22 to support them.

By the way, in the second embodiment described above, a jumper wire formed in a U-shape is used as the connection assisting member 26, but as another example, as shown in FIG. The auxiliary connecting member 40 may be an eyelet arranged on the front and back of the printed wiring board 22 with the extending portion 25a interposed therebetween. Further, as shown in FIG. The auxiliary connection member 41 may be formed of a metal terminal plate disposed on the surface 22a of the printed wiring board 22 so as to face the portion 25a. The auxiliary connecting member 41 is a metal terminal plate body 41a and a connecting foot portion projecting downward from the metal terminal plate body 41a, penetrating the printed wiring board 22 and connected to the wiring pattern 25 on the back surface 22b side of the printed wiring board 22. It consists of 41b.

Further, as shown in FIG. 5, a connector 50 may be constructed by disposing a plurality of clip members 52, ... In one box 51. By configuring the connector 50 in this way, it becomes possible to connect the plurality of wiring patterns 25 to the lead frame 21 (not shown in FIG. 5) at one time. In addition, such a connector 50
When using, the extended portions 25a of the wiring patterns 25 need to be projected outward from the board end together with the printed wiring board 22. Further, in FIG. 5, the connection auxiliary member 53 uses the jumper wire, but it goes without saying that other connection auxiliary members such as eyelets and metal terminal plates may be used.

[0030]

As described above, according to the first aspect of the present invention, since the connector contacts the member to be connected through the sandwiching portions which are linearly arranged in parallel with each other, the connector and the connector are connected to each other. It has come to be possible to obtain a contact area sufficient for making surface contact with the connecting member and obtaining conduction. Therefore, the contact resistance at the connection portion between the connector and the member to be connected is reduced, a stable connection state can be obtained, and heat generation at the connection portion can be reduced.

Further, according to the second aspect of the present invention, since the connection by the connector is a mechanical connection, even if external stress is applied to the connection site, it does not cause defects such as cracks and pattern peeling and is stable. You can now get the connection status.

Since the terminal-shaped member to be connected is usually made of a hard metal plate such as a copper plate, it is not easy to directly connect it to the wiring pattern even with a connector. However, since the connection assisting member connected to the wiring pattern is interposed between the connector and the wiring pattern to connect the two, the connection assisting member reliably connects the terminal-shaped connected member and the wiring pattern. Become.

Further, since the end portion of the printed wiring board and the terminal-like member to be connected are sandwiched and fixed by the connector, the connection between them can be easily released only by removing the connector, and the connection can be released without any problem. It was

[Brief description of drawings]

FIG. 1 is a sectional view showing a structure of a connector according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a connection structure between a printed wiring board and a three-dimensional circuit component according to a second embodiment of the present invention.

FIG. 3 is a sectional view showing a first modification of the second embodiment.

FIG. 4 is a sectional view showing a second modification of the second embodiment.

FIG. 5 is a partially cutaway plan view showing a third modification of the second embodiment.

FIG. 6 is a side view showing a structure of a three-dimensional circuit component using the connectors of the first conventional example and the first example.

FIG. 7 is a sectional view showing a structure of a connector of a first conventional example.

FIG. 8 is a perspective view showing a connection structure of a printed wiring board of a second conventional example.

[Explanation of symbols]

 2 Box Body 3 Clip Member 4 Base End 5 Clamping Part 21 Lead Frame 22 Printed Wiring Board 25 Wiring Pattern

Claims (2)

[Claims] 1. A connector for holding a plurality of members to be connected together and connecting them to each other, and a box body having one open surface, and a clip member having spring properties and conductivity contained in the box body. The clip member is provided with a base end portion arranged in a U shape along the inner surface of the box, and both ends of the base end portion are bent inward toward the bottom of the box body and both bending tips are provided. A holding part for holding the connected member, which is formed by extending the parts linearly and in parallel with each other. 2. A printed wiring board connection structure for connecting a terminal-shaped connected member to a wiring pattern formed on one surface side of a printed wiring board using the connector according to claim 1, wherein the wiring pattern is a printed wiring board. In addition to extending to the end portion, a connection auxiliary member is provided on the other surface side of the board end portion along the printed wiring board and in conduction with the wiring pattern, and the terminal-like connected member is connected to the wiring pattern extending portion. A connection structure for a printed wiring board, characterized in that the two are abutted against each other and clamped and fixed by a connector to be connected to each other.