JP3321133B2 - Conductive material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductive member for electrically connecting a conductive pattern of a printed wiring board to a ground conductor while the surface is mounted on the printed wiring board.

[0002]

2. Description of the Related Art Conventionally, when a conductive member is surface-mounted on a printed wiring board and the printed wiring board is fixed in that state, the conductive member is brought into pressure contact with a ground conductor, and the conductive member of the printed wiring board is electrically connected via the conductive member. There is known a technique of electrically connecting (grounding) a pattern to a ground conductor. Particularly, in recent years, with the development of computer technology, many devices incorporating a microcomputer have been commercialized, and this technology is indispensable for grounding a printed wiring board inside such a device. With the miniaturization of such devices, there is a current situation where the above-mentioned conductive members are miniaturized as much as possible.

FIG. 10 shows an example of a conventional conductive member.
10A is a front view, FIG. 10B is a plan view, and FIG.
(C) is a side view seen in the direction indicated by the symbol K shown in (a) of FIG. This conductive member is formed by bending a thin plate-shaped metal material, and is formed by bending side portions 141 from the long top plate portion 142 on both sides in the short direction thereof substantially vertically. The side part of the side part 141 far from the top plate part 142 is a joint part 110 having a joint surface 110a to be soldered to the conductor pattern of the printed wiring board.

[0004] A spring portion 121 is folded back from the longitudinal direction of the top plate portion 142 to the joint portion 110 side, a support portion 122 connected to the spring portion 121 and disposed between the side portions 141, and And a real contact portion 123 which is bent from the tip of the support portion 122 and is located above the top plate portion 142 and is in contact with the above-described ground conductor.

[0005] The conductive member is soldered to the conductor pattern of the printed wiring board at the bonding surface 110a of the bonding portion 110, and is surface-mounted on the printed wiring board. And
When the printed wiring board is fixed at a predetermined position in that state,
The actual contact portion 123 is pressed against the ground conductor. That is, when the ground conductor contacts the actual contact portion 123 from above, the support portion 122
Move to the printed wiring board side.
The actual contact portion 123 is brought into pressure contact with the ground conductor by elastic deformation centered at 1.

Incidentally, the work of surface mounting such a conductive member on a printed wiring board is performed in order to improve work efficiency.
Automatically performed by an automatic mounting machine. The automatic mounting machine (not shown) includes a vacuum suction device having a suction nozzle and a reflow soldering device.

The automatic mounting machine first lifts the conductive member by vacuum-suctioning the suction surface of the conductive member using a vacuum suction device. Next, by moving the conductive member sucked by the vacuum suction device, the conductive member is moved onto the conductor pattern of the printed wiring board, and the conductive member is detached from the vacuum suction device at that position, and the conductive member is transferred to the soldering position. Place the member. Finally, the conductive member is soldered to the conductor pattern of the printed wiring board using a reflow soldering device.

[0010] In the conductive member shown in FIG.
The upper surface of No. 2 corresponds to the suction surface. That is, FIG.
As shown in FIG. 7, the suction port 410, which is the tip of the cylindrical suction nozzle 400, is brought close to the suction surface 142a of the top plate 142, and the pressure inside the suction nozzle 400 is reduced. A movement of air in the direction indicated by S is generated to attract the conductive member.

On the other hand, as described above, the conductive member is miniaturized as much as possible. Therefore, the positional relationship between the top plate 142 and the side portion 141 of the conductive member and the suction port 410 is shown in FIG. FIG. 11B shows a substantially circular suction port 41 at the position shown by the broken line when the conductive member is suctioned by the suction nozzle 400.
0 indicates contact. That is, the width D of the top plate portion 142 is designed to be slightly larger than the diameter d of the suction port 410 of the substantially circular suction nozzle 400 in order to realize downsizing.

[0010]

(1) However, FIG.
Since the metal member shown in the development view in FIG. 1B is bent at the two-dot chain line portion in the figure to form the top plate 142, the following problems occur when the conductive member is attracted as described above. Occurs.

It is physically impossible to make the bent portion between the top plate 142 and the side portion 141 at a right angle, and this bent portion is bent at a certain radius. FIG. 12 highlights a state where the connecting portion between the side portion 141 and the top plate portion 142 is bent at a certain radius.

As can be seen from FIG. 12, since the connecting portion between the top plate 142 and the side portion 141 cannot be made a right angle, a gap (symbol α) is provided between the suction port 410 of the suction nozzle 400 and the top plate 142. (Shown). Even if there is such a gap, the conductive member can be vacuum-sucked by the vacuum suction device, but the suction efficiency is reduced. For example, the time required to lift one conductive member is longer than that when there is no gap. Then, it becomes longer by about 0.1 second. Therefore, considering the current situation in which, for example, thousands to tens of thousands of conductive members are continuously mounted on a printed wiring board,
Automatic mounting efficiency will be greatly reduced.

Further, when the vicinity of the bent portion of the top plate 142 is sucked, there is a possibility that the conductive member is not tilted up and sucked in a tilted manner. Also in that case, the automatic mounting efficiency is greatly reduced. In addition, the width D of the top plate 142 shown in FIG. 11B may be increased, but in this case, the entire conductive member becomes large, which is not desirable from the viewpoint of miniaturization as much as possible.

(2) Further, when the conductive member as described above is mounted on the printed wiring board, the following problem occurs. The problem is caused by the tolerance of the position of the printed wiring board flowing on the line, the height of the top plate of each conductive member, and the movable range when moving the vacuum suction device. Since the height of the conductive member shown in the above-described example from the bonding surface 110 to the top plate 142 is as small as 1 mm, for example, the placement of the suction nozzle 400 on the printed wiring board is 0.2 mm. If you move to the side of the printed wiring board extra by such a distance,
A load is applied to the top plate portion 142 and the side portions 141. At this time, since the plate thickness of the conductive member is as thin as 0.12 mm, for example, the top plate portion 142 and the side portion 141 exceed their elastic limits and are permanently deformed. When the conductive member is continuously placed on the printed wiring board, such a member cannot be made into a product, and as a result, the efficiency of automatic mounting is reduced.

[0015] The present invention relates to a structure of a suction portion comprising a side portion and a top plate bent from the side portion,
The first object is to increase the suction efficiency of the vacuum suction device when the conductive member is suctioned, and the second purpose is to reduce the possibility of permanent deformation of the suction portion when the conductive member is mounted. In addition, automatic mounting efficiency is improved.

[0016]

Means for Solving the Problems and Effects of the Invention In the conductive member according to the first aspect of the present invention, which has been made to achieve the first object, a suction portion, a joint portion, and a contact portion are predetermined. It is formed by bending a thin plate-shaped member having a bent shape.

The suction section has a suction surface to be sucked by a suction nozzle of the vacuum suction device. When the suction surface is suctioned by the vacuum suction device, a predetermined position of the printed wiring board is determined using the vacuum suction device. Placed at the specified position. Also,
The bonding part has a bonding surface that is soldered to the conductor pattern of the printed wiring board, and by fixing the printed wiring board in a state of being surface-mounted on the printed wiring board, a part of the contact part becomes a ground conductor. Crimp.

In the present invention, in particular, in the present invention, the above-mentioned suction portion is formed by bending a side portion erected on both sides of the main body and at least one of the side portions in parallel with the joining surface,
One surface is provided with a top plate portion serving as a suction surface. Then, the top plate portion is connected to the side portion at both ends in a direction perpendicular to the bending direction of the top plate portion from the side portion, and a cutout in the direction of the top plate portion is provided inside the connected portion. Thereby, a tongue portion is formed on the top plate portion, and when bent at the connecting portion, the tongue portion is projected in parallel as a part of the top plate portion, and a part of the suction surface is formed by the tongue portion I did it.

This will be specifically described with reference to FIG.
FIG. 8A is a developed view of a suction portion formed by the side portions 81a and 81b and the top plate portion 82, and FIG. 8B is a perspective view of the suction portion after being bent. Side portions 81a, 81
The side portions 81a, 81b and the top plate portion 82 are connected at both ends in a direction (direction indicated by symbol N) perpendicular to the bending direction from b (direction indicated by symbol M in FIG. 8A). . Therefore, the connecting portion 83 is a portion indicated by a broken line in FIG.

The top plate 8 is provided inside the connecting portion 83.
By providing the notch 84 on the second side, the top plate 8
2, a tongue 85 is formed. As a result, when the top plate portion 82 is bent at the connecting portion 83 in the developed view shown in FIG. 8A, the tongue portion 85 projects in parallel as a part of the top plate portion 82, and is attracted by the tongue portion 85. A part of the surface 82a is formed. This is as shown in FIG.

(A) In this manner, the suction surfaces 82a are flat at both ends in the width direction of the top plate portion 82 (the direction indicated by the symbol M in FIG. 8A). The gap indicated by α disappears, and the adsorption efficiency does not deteriorate. Therefore, when several thousand to tens of thousands of conductive members are successively mounted on the printed wiring board, the automatic mounting efficiency can be improved as compared with the conventional case.

(A) Since the suction surface 82a is flat at both ends, even when the conductive member is sucked at a portion near the end of the top plate 142, the conductive member does not tilt,
The conductive member is always lifted in parallel. Therefore, also in this respect, the automatic mounting efficiency can be improved.

(C) Further, when the width of the flat suction surface of the top plate 142 in the conventional conductive member shown in FIG. 10 is to be ensured, in the present invention, compared with the conventional conductive member,
The space between the side portions 81a and 81b is reduced. That is, when the suction surface having the same width as the conventional suction surface is formed, the conductive member can be made compact, and the weight of the conductive member can be reduced. Thereby, the energy for adsorbing the conductive member can be suppressed, and the efficiency of automatic mounting can be improved.

The reason that the top plate portion is formed by bending at least one of the side portions is that a conductive member of a type in which side portions are erected on both sides of a joint having a joint surface is also considered. Because it can be done. FIG. 3A is a development view of such a suction portion of the conductive member. That is, the two side portions 41a and 41b are connected to the joint portion 10, and the top plate portion 42 is connected to one side portion 41a. Therefore, the perspective view after bending at the broken line portion shown in FIG. 3A is as shown in FIG. 3B. That is, when the top plate portion 42 is bent at the connection portion 83 with the one side portion 41a, the tongue portion 45 becomes a part of the top plate portion 42 by the notch 44 formed inside the connection portion 43. Project in parallel. Therefore, in this case as well,
The same effects as described in (A) to (C) above can be obtained, and the automatic mounting efficiency can be improved.

A contact portion is connected to the longitudinal end of the joint portion 10 shown in FIG. 3 (a). Here, only the suction portion is shown to avoid complication, and the structure of the contact portion and the like will be described. Was omitted. Further, in FIG. 3 (b), the bent portions of the side portions 41a and 41b from the joint portion 10 are shown at right angles as shown by the symbol B, but actually these bent portions also have a certain radius. . However, since it is irrelevant to the invention, it is shown at right angles. The same applies to FIGS. 6 and 7 described later.

By the way, as described above, the width of the top plate is
When slightly larger than the diameter of the suction port of the suction nozzle,
There is a possibility that the suction nozzle is shifted in the width direction of the top plate part during suction, in which case, even if the above configuration is adopted,
Adsorption efficiency may decrease. Therefore, as shown in claim 2, when the tongue-shaped portion is formed longer on the side portion side than the connecting portion, and when the top plate portion is bent at the connecting portion,
It is conceivable to increase the area of the suction surface formed by the tongue.

For example, as shown in FIG.
5 is formed longer in the side portion 51a direction than the connection portion 53. In this way, as shown in FIG. 6B, when the top plate portion 52 is bent at the connecting portion 53, the suction surface formed by the tongue-shaped portion 55 becomes large. Thus, it is possible to prevent the suction nozzle from lowering in suction efficiency due to the displacement of the top plate 52 in the width direction.

In the structure in which the top plate is connected to both side portions, tongue portions are formed on both sides of the top plate (see FIG. 8). Therefore, if the two tongue portions are made longer than the connecting portion, the suction surface can be enlarged in both side directions of the top plate portion. However, in a structure in which the top plate is connected to one side, the tongue is formed on only one side. Therefore, by making the tongue long,
The suction surface is enlarged only in the direction in which the tongue is formed. Therefore, if the suction nozzle is displaced in a direction in which the tongue-shaped portion is not formed, the suction efficiency is deteriorated.

Therefore, when the top plate is formed by being bent from one of the side portions, the end of the top plate that is not connected to the side portion is higher than the side portion. The area of the suction surface may be increased so as to be located outside. For example, as shown in FIGS. 7A and 7B. That is, the end portions 65b, 75b of the top plate portions 62, 72 that are not connected to the side portions 61b, 71b are connected to the side portions 61b,
It should be located outside of 71b.

In this way, even if the top plate is formed by being bent from one of the side portions, the suction surface can be enlarged on both sides in the width direction of the top plate. In addition,
In FIG. 7A, the end 65 has a shape similar to that of the tongue 65a.
b is formed. In this case, compared to the case where the end is simply lengthened, there is no corner portion of the end, which is advantageous in that the conductive member becomes more compact.

According to a fifth aspect of the present invention, there is provided a conductive member according to a fifth aspect of the present invention, wherein the attraction portion, the joining portion, and the contact portion have a predetermined shape. It is formed by bending a member. In the present invention, in particular, the top plate portion of the suction unit is formed by bending one of the side portions erected on both sides of the main body in parallel with the joining surface, and further, one side connected to the top plate portion. The other side portion not connected to the top plate portion with respect to the side portion is formed slightly shorter, so that a gap is provided between the tip portion of the other side portion and the top plate portion.

As described above, since there are tolerances in the arrangement position of the printed wiring board to be mounted, the height of the top plate of the conductive member, and the movable range of the vacuum suction device, the printed wiring board is mounted on the printed wiring board. At this time, the suction nozzle may push down the suction portion, and in that case, the top plate and the side portions exceed their elastic limits and are permanently deformed.

On the other hand, in the present invention, the side portions not connected to the top plate are formed slightly shorter to provide a gap. Thus, even if a situation occurs where the suction nozzle pushes down the suction portion, the top plate portion moves toward the joint portion by the gap, so that the suction portion can be prevented from being permanently deformed.
In addition, the `` gap '' here refers to the movable range of the vacuum suction device, the arrangement position of the printed wiring board, the height of the top plate portion of the conductive member, and the like, taking into consideration the tolerance of the portion related to the placement of the conductive member, What is necessary is just to be able to relatively reduce the possibility that the suction portion is permanently deformed.

The first object is achieved by the conductive member according to any one of the first to third aspects, and the second object is achieved by the conductive member according to the fifth aspect. . Of course, it goes without saying that a conductive member that can achieve both purposes can be configured.

That is, as shown in claim 4, claim 1
In the case where the top plate is formed by being bent from one of the side portions on the premise of the configuration described in any one of (1) to (3), one side portion connected to the top plate portion is connected to the top plate portion. By forming the other side portion not to be formed slightly shorter, it is possible to provide a gap between the tip portion of the other side portion and the top plate portion. By doing so, both the first and second objects can be achieved, and the efficiency of automatic mounting by the automatic mounting machine can be greatly improved.

As a specific configuration of the conductive member as described above, for example, it is conceivable to adopt a configuration as set forth in claim 6. That is, the joining portion is formed in a long shape, and the joining portion is bent to the opposite side of the joining surface to form side portions on both sides in the short direction of the joining portion, and further, the tip side of one side portion Is bent to form a top plate. And the contact part is
A spring portion folded from the longitudinal end of the joint portion to the opposite side of the joint surface, a support portion connected to the spring portion, and an elastic deformation centered on the spring portion connected to the distal end side of the support portion And an actual contact portion that presses against the ground conductor. At this time, the support part is disposed so as to pass between the top plate part and the joint part.

On the premise of such a conductive member, it is preferable that the contact portion further includes an arm connected to the distal end side of the actual contact portion. When the arm portion is bent toward the joint portion, elastic deformation occurs around the spring portion, and elastic force occurs around the bent portion due to a drag force from the joint portion applied to the tip portion of the arm portion. To do.

The conductive member mentioned here is, for example, the one shown in FIG. FIG. 1A is a front view, and FIG.
(B) is a rear view. That is, the long joint 10
The side portions 41a and 41b are formed on both sides in the short direction of the joint portion 10 by folding back from the side opposite to the joint surface 10a. Then, the top plate portion 42 is formed by bending the distal end side of one side portion 41a.

At this time, the contact portion 20 is connected to the spring portion 21 folded from the longitudinal end of the joint portion 10 to the opposite side of the joint surface 10a, the support portion 22 connected to the spring portion 21, and the support portion 22. And an arm portion 24 connected to the distal end of the actual contact portion 23.

The arm 24 is bent toward the joint 10. When elastic deformation occurs around the spring 21, the tip of the arm 24 comes into contact with the joint 10, causing elastic deformation. While moving to the spring portion 21 side. In this way, in addition to the reaction force due to the elastic deformation of the spring portion 21, the arm portion 2
Since a reaction force is generated due to the elastic deformation of the support member 4, a sufficient reaction force can be obtained even if the conductive member itself is reduced in size and the width of the support portion 22 is reduced. As a result, a sufficient ground pressure can be secured, and even if the contact portion 20 receives an external action during automatic mounting, the number of so-called failures is reduced, so that the automatic mounting efficiency is reduced. Further improvement can be achieved.

Further, as a specific configuration of the conductive member described in claim 1 or 2, for example, it is conceivable to adopt the configuration described in claim 8. That is, a side portion is connected to both sides of the top plate portion, a joint portion is formed at a portion of the side portion far from the top plate portion, and a spring portion folded from the top plate portion to the joint portion side, A contact portion configured to include a support portion connected to the spring portion, and an actual contact portion connected to the distal end side of the support portion and pressed against a ground conductor by elastic deformation centered on the spring portion; It is conceivable to dispose the support part so as to pass between the part and the joint part.

Since the suction surface of the top plate is sucked by the suction nozzle to lift the conductive member, the center of gravity should be located between the top plate and the joint. Is desirable. With this configuration, when the conductive member is lifted by being sucked by the vacuum suction device, the conductive member can be prevented from tilting as much as possible, which further contributes to improvement in the automatic mounting efficiency of the conductive member.

[0043]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show the configuration of the conductive member of the embodiment. 1A is a front view, FIG. 1B is a rear view, and FIG. 2 is a plan view.

The conductive member 1 of the present embodiment is formed by bending a metal material such as beryllium copper having a thin plate shape (for example, a plate thickness: 0.12 mm).
0, a protection unit 30, and a suction unit 40. The joint 10 is, for example, 4.5 mm long in the longitudinal direction and 0.1 mm short in the transverse direction.
One surface (lower surface) of the bonding portion 10 is a bonding surface 10a to be soldered to a conductor pattern of a printed wiring board.

Both ends in the longitudinal direction of the joint 10 are joined to the joint surface 1.
Oa is bent substantially perpendicularly to the opposite side, and the portion turned back at one end of the joint portion 10 constitutes the above-mentioned contact portion 20, while the portion turned back at the other end is, for example, 1.0
The protection unit 30 has a height of mm.
That is, the protection part 30 is provided upright on the other end side of the joint part 10.

The contact part 20 is formed with a spring part 21 which is bent to a height of, for example, 0.9 mm from a part turned at one end of the joint part 10. The other side of the spring portion 21 from the joint 10 is connected to a support 22 extending substantially parallel to the joint 10. Support part 22
The opposite side (tip side) of the spring portion 21 is
, And is connected to the actual contact portion 23 folded back toward the joint portion 10 side. Here, the opposite side (tip side) of the support portion 22 in the actual contact portion 23 is substantially perpendicular to the joint portion 10. This portion is further bent downward in the direction of the spring portion 21, and the arm portion 24 forming an acute angle with the joint portion is connected.

On the other hand, side portions 41a and 41b are provided upright on both sides in the lateral direction of the joint portion 10. The two side portions 41a and 41b are formed by being bent from the joint portion 10 to the side opposite to the joint surface 10a, and are substantially perpendicular to the joint surface 10a. The top plate portion 42 is bent from one side portion 41a in parallel with the joint surface 10a. Thus, a box-shaped suction section 40 is formed.

The conductive member 1 of this embodiment is provided with
Because of the characteristic of the structure of FIG.
The structure of the suction unit 40 will be described. FIG. 3 shows two side portions 41a and 41b, a top plate portion 42 connected to one side portion 41a, and a joint portion 10 connected to the two side portions 41a and 41b. FIG. 3A is a development view,
FIG. 3B is a perspective view.

The two side portions 41a and 41b are connected at both ends (for example, 0.4 mm in width) of the joint portion 10. Further, from both ends, a column (for example, width: 0.2 mm) having a width smaller than both ends is extended. And in one side part 41a to which the top plate part 42 is connected,
On the opposite side (tip side) of both ends of the support portion, a top plate portion 42 is connected. On the other hand, in the other side portion 41b to which the top plate portion 42 is not connected, the distal end side of the support portion is connected. A notch 44 toward the top plate 42 is formed inside the connection portion 43 between the side portion 41a and the top plate 42, and a tongue 45 is formed on the top plate 42 by the notch 44. It is formed. Accordingly, as shown in FIG. 3B, the tongue-shaped portion 45 projects in parallel as a part of the top plate portion 42, that is, when viewed from the direction indicated by the symbol L in FIG. As described above, even if the connecting portion 43 is bent at a certain radius, the tongue portion 45 is parallel to the top plate portion 42 and forms a part of the suction surface 42a.

The side portion 41 to which the top plate portion 42 is connected is connected.
4A, the side portion 41b not connected to the top plate portion 42 is formed slightly shorter, and as shown in FIG. .1m
m or less). Furthermore, each part including the contact part 20 and the protection part 30 is configured between the top plate part 42 of the suction part 40 and the joint part 10 so that the center of gravity of the conductive member 1 exists.

As shown in FIG. 5, the conductive member 1 of the present embodiment having the above-described structure is soldered to the conductor pattern 210 of the printed wiring board 200 with solder 220. When fixed, the actual contact portion 2
3 presses against the ground conductor 300 to electrically connect the conductor pattern 210 of the printed wiring board 200 and the ground conductor 300. At this time, when the actual contact portion 23 is pushed down from above, the distal end portion of the arm portion 24 moves toward the spring portion 21 while abutting on the joint portion 10, and moves to the folded portion (indicated by the symbol γ) of the spring portion 21. Not limited to this, elastic deformation occurs from the actual contact portion 23 to the bent portion (indicated by the symbol ε) of the arm portion 24 and the connection portion (indicated by the symbol δ) between the support portion 22 and the actual contact portion 23. This ensures that the actual contact portion 23 is pressed against the ground conductor 300.

When such a conductive member 1 is used, the automatic mounting efficiency is improved as compared with a conventional conductive member. Less than,
This will be described. That is, as shown in FIG.
A tongue-like portion 45 protrudes from the top plate portion 42 in parallel with the suction surface 42.
Since a part of “a” is formed, there is no gap between the top plate portion 42 and the suction port 410 unlike the conventional conductive member illustrated in FIG. Therefore, according to the conductive member 1 of the present embodiment, the adsorption efficiency does not deteriorate, and the automatic mounting efficiency can be improved. In particular, when thousands or tens of thousands of conductive members 1 are successively mounted on a printed wiring board, the effect is remarkable. Further, even when the conductive member is sucked at a portion near the end of the top plate portion 42, the conductive member does not tilt and the conductive member is always lifted in parallel. Therefore, also in this respect, the automatic mounting efficiency can be improved.

Conventionally, when a conductive member is placed on a conductive pattern on a printed wiring board, the movable range of the vacuum suction device, the arrangement position of the printed wiring board, the height of the top plate portion of the conductive member, and the like have been known. The suction nozzle may push down the suction part due to the tolerance of the part related to the placement of
The suction part may be permanently deformed. This means that a predetermined percentage of the components are defective, and as a result, the automatic mounting efficiency is reduced.

On the other hand, in the present embodiment, as shown in FIG. 4, a gap β (for example, 0.1 mm or less) is provided between the tip of the side portion 41b and the top plate 42. Even if the suction nozzle 400 pushes down the top plate portion 42,
Move to the joint portion 10 side, the possibility that the suction portion 40 is permanently deformed is reduced. As a result, the automatic mounting efficiency is further improved.

Further, in this embodiment, the actual contact portion 23
Is provided with an arm 24 at the tip side. Thereby, as shown in FIG. 5, when the actual contact portion 23 is pushed down from above,
The arm portion 24 moves toward the spring portion 21 while abutting on the joint portion 10, and the bent portion (indicated by the symbol ε) of the arm portion 24 from the actual contact portion 23 and the connection between the support portion 22 and the actual contact portion 23. It is elastically deformed around the part (indicated by the symbol δ). That is,
Since a reaction force due to the elastic deformation of the arm portion 24 is generated in addition to the reaction force due to the elastic deformation of the spring portion 21, a sufficient contact pressure is ensured even when the width of the support portion 22 is small. Further, even if an external action during automatic mounting is applied to the contact portion 20, so-called defective ones are reduced, so that the automatic mounting efficiency can be further improved.

Further, as described above, each part including the contact part 20 and the protection part 30 is constituted between the top plate part 42 of the suction part 40 and the joint part 10 so that the center of gravity of the conductive member 1 exists. Have been. Thereby, when the conductive member 1 is lifted by being sucked by the suction nozzle 400, the conductive member 1 can be prevented from tilting from the horizontal direction, and this contributes to an improvement in the automatic mounting efficiency of the conductive member 1.

As described above, the present invention is not limited to the above embodiments, and can be implemented in various modes without departing from the gist of the present invention. (A) For example, in consideration of the possibility that the suction nozzle 400 is shifted in the width direction of the top plate portion during suction, it is conceivable to form a suction portion as shown in FIG. That is, as shown in FIG.
It is formed long in the 1a direction. By doing so, FIG.
As shown in (b), when the top plate portion 52 is bent at the connecting portion 53, the suction surface formed by the tongue portion 55 becomes large. Thereby, even if the suction nozzle is displaced in the width direction of the top plate portion 52, it is possible to prevent the suction efficiency from lowering.

(B) Further, it is conceivable to construct an adsorption section exemplified in FIGS. 7 (a) and 7 (b). That is, the ends 65b and 75b of the top plate portions 62 and 72 that are not connected to the side portions 61b and 71b may be located outside the side portions 61b and 71b. In this way, the suction surfaces can be enlarged on both sides in the width direction of the top plate portions 62, 72. In FIG. 7A, the end 65b is formed in the same shape as the tongue 65a. In this case, as compared with the configuration of FIG. 7B in which the end is simply lengthened, there is no corner at the end, which is advantageous in that the conductive member becomes more compact.

(C) Further, the present invention can be applied to a conductive member in which a contact portion is connected to a top plate portion and side portions are connected to both sides of the top plate portion as illustrated in FIG. It is. In this case, as shown in FIG. 8, the two side portions 81a,
A tongue 85 may be formed inside each of the connection portions 83 with 81b. At this time, the tongue-shaped portion 85 can be formed long to enlarge the suction surface. In addition, as shown in FIG. 9, the lower part of the side parts 91a and 91b may be bent to form the joint 96. In this case, the joining surface 96a becomes large, and it can be securely soldered to the printed wiring board.

(D) In this embodiment, the conductive member is made of beryllium copper, but a metal having high elasticity may be used. For example, phosphor bronze can be considered. Further, plating treatment may be performed to enhance contact conductivity and rust resistance. For example, gold plating or rhodium plating with nickel plating as a base may be applied.

[Brief description of the drawings]

FIG. 1A is a front view of a conductive member according to an embodiment,
(B) is a rear view of the conductive member of the example.

FIG. 2 is a plan view of the conductive member of the embodiment.

FIGS. 3A and 3B show a structure of a suction portion of the conductive member of the embodiment, in which FIG. 3A is a developed view and FIG. 3B is a perspective view.

FIG. 4 is an explanatory view of a structure of a suction portion of a conductive member and a relationship with a suction nozzle of the embodiment viewed from a side.

FIG. 5 is an explanatory diagram showing a use state of the conductive member of the example.

FIGS. 6A and 6B show a structure of a suction portion of a conductive member according to another embodiment, wherein FIG. 6A is a developed view and FIG. 6B is a perspective view.

FIG. 7 is a perspective view illustrating a structure of a suction portion of a conductive member according to another embodiment.

8A and 8B show a structure of a suction portion of a conductive member according to another embodiment, where FIG. 8A is a developed view and FIG. 8B is a perspective view.

FIG. 9 is a perspective view showing a structure of a suction portion of a conductive member according to another embodiment.

FIG. 10 illustrates a conventional conductive member, in which (a)
Is a front view, (b) is a plan view, and (c) is a side view.

FIG. 11 is an explanatory diagram showing a relationship between a conventional conductive member and a suction nozzle.

FIG. 12 is an explanatory diagram showing a problem related to vacuum suction of a conventional conductive member.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Conductive member 10 ... Joint part 10a ... Joint surface 20 ... Contact part 21 ... Spring part 22 ... Support part 23 ... Actual contact part 24 ... Arm part 30 ... Protective part 40 ... Suction part 41a, 51a, 61a, 71a, 81a. , 91a ...
(One) side portions 41b, 51b, 61b, 71b, 81b, 91b ...
(The other) side portions 42, 52, 62, 72, 82, 92 ... top plate portions 42a, 82a ... suction surfaces 43, 53, 83 ... connecting portions 44, 54, 84 ... notches 45, 55, 65a, 75a, 85, 95 ... tongue 65b, 75b ... end 96 ... joining part 96a ... joining surface 200 ... printed wiring board 210 ... conductor pattern 220 ... solder 300 ... grounding conductor 400 ... suction nozzle 410 ... suction port

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H05K 3/34 H01R 11/01 H01R 13/24

Claims (9)

(57) [Claims] 1. A suction section having a suction surface to be sucked by a suction nozzle of a vacuum suction apparatus so that the suction section can be disposed at a predetermined position on a printed wiring board using a vacuum suction apparatus; A bonding portion having a bonding surface to be soldered to a conductor pattern of the board, and a contact portion of which a part is pressed against a ground conductor by fixing the printed wiring board in a state of being surface-mounted on the printed wiring board, Formed by bending a sheet-like member of a predetermined shape,
In a conductive member for electrically connecting a conductor pattern of the printed wiring board to the ground conductor, the adsorbing portion includes a side surface erected on both sides of a main body and the joining surface from at least one of the side portions. And a top plate portion having one surface forming the suction surface. The top plate portion is provided at both ends in a direction perpendicular to a bending direction of the top plate portion from the side portion. Is connected to the side portion, and by providing a cutout in the direction of the top plate portion inside the connection portion, a tongue portion is formed on the top plate portion,
A conductive portion, wherein the tongue-shaped portion is projected in parallel as a part of the top plate portion when bent at the connecting portion, and the tongue-shaped portion forms a part of the suction surface. Element. 2. The conductive member according to claim 1, wherein said tongue-shaped portion is formed longer on said side portion side than said connection portion, and said top plate portion is bent at said connection portion. A conductive member, wherein the area of the suction surface formed by the tongue-shaped portion is increased. 3. The conductive member according to claim 1, wherein, when the top plate is formed by being bent from one of the side portions, an end of the top plate not connected to the side portion. A conductive member, characterized in that the portion is located outside the side portion and the area of the suction surface is increased. 4. The conductive member according to claim 1, wherein the top plate is formed by being bent from one of the side portions. By forming the other side portion that is not connected to the top plate portion slightly shorter than the side portion, a gap is provided between the tip portion of the other side portion and the top plate portion. Characteristic conductive member. 5. A suction section having a suction surface to be sucked by a suction nozzle of the vacuum suction apparatus so that the suction section can be disposed at a predetermined position on the printed wiring board using a vacuum suction apparatus; A bonding portion having a bonding surface to be soldered to a conductor pattern of the board, and a contact portion of which a part is pressed against a ground conductor by fixing the printed wiring board in a state of being surface-mounted on the printed wiring board, Formed by bending a sheet-like member of a predetermined shape,
In a conductive member for electrically connecting a conductor pattern of the printed wiring board to the ground conductor, the attraction portion includes a side portion erected on both sides of a main body, and one of the side portions to the joining surface. A top plate portion formed so as to be bent in parallel and having one surface forming the suction surface, and the other side not connected to the top plate portion with respect to one side portion connected to the top plate portion A conductive member, characterized in that a gap is provided between the top portion and the tip of the other side by slightly shortening the side. 6. The conductive member according to claim 1, wherein said joining portion is formed in a long shape, and said joining portion is bent to a side opposite to said joining surface to be shorter than said joining portion. The side portions are erected on both sides in the direction, and the top side portion is further formed by bending the tip side of one side portion, and the contact portion is formed from the longitudinal end of the joining portion to the joining surface. A spring portion folded back to the opposite side, a support portion connected to the spring portion, and an actual contact portion connected to the distal end side of the support portion and pressed against the ground conductor by elastic deformation around the spring portion A conductive member, wherein the support portion is disposed so as to pass between the top plate portion and the joint portion. 7. The conductive member according to claim 6, wherein the contact portion further includes an arm connected to a tip side of the actual contact portion, and the arm is bent toward the joint. A conductive member that, when elastic deformation occurs around the spring portion, elastic deformation occurs around the bent portion by a reaction force from the joint portion applied to the tip portion of the arm portion. . 8. The conductive member according to claim 1, wherein the side portion is connected to both sides of the top plate portion, and the joining portion is connected to a portion of the side portion far from the top plate portion. Forming a spring portion folded back from the top plate portion to the joint portion side, a support portion connected to the spring portion, and a tip end side of the support portion, wherein the spring portion And a contact portion that is pressed against the ground conductor by elastic deformation with the center as the center, wherein the support portion is disposed so as to pass between the top plate portion and the joint portion. Element. 9. The conductive member according to claim 6, wherein a center of gravity is located between said top plate and said joint.