JP3450118B2 - Circuit board device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit board device for use in, for example, a portable wireless device, in which first and second boards laminated on each other are electrically connected by a conductive rubber connector. .

[0002]

2. Description of the Related Art FIG. 10 is an exploded perspective view showing an example of a conventional circuit board device. In the figure, reference numeral 1 denotes a first substrate having connection electrode portions 1a provided along two edges on the lower surface, and reference numeral 2 denotes an upper surface of the connection electrode portion 2a facing the connection electrode portion 1a of the first substrate 1. The second board 3 provided in the holder is interposed between the first and second boards 1 and 2, and the reference numeral 4 is inserted into the connector insertion hole 3a of the holder 3 to connect the connection electrode portion 1
A conductive rubber connector for connecting a and 2a, 5 is a screw penetrating the first substrate 1, the holder 3 and the second substrate 2, and 6 is a nut plate to which the tip of the screw 5 is screwed.

In the circuit board device constructed as described above, the conductive rubber connector 4 is inserted and positioned in the connector insertion hole 3a, and the holder 3 is sandwiched between the first and second boards 1 and 2 by screws. Fix with 5 and nut plate 6.
At this time, the elastic conductive rubber connector 4 is compressed and pressed against the connection electrode portions 1a and 2a by its repulsive force.

In addition, as a method of connecting substrates of this type,
For example, Japanese Utility Model Publication No. 63-77373, Japanese Utility Model Publication No. 2-27.
The techniques disclosed in Japanese Laid-Open Patent Application No. 672, Japanese Patent Laid-Open No. 2-58889 and Japanese Utility Model Laid-Open No. 62-89197 are known.

[0005]

In the conventional circuit board device constructed as described above, since the assembly is performed using the screw 5 and the nut plate 6, the number of parts is increased and the assembly / disassembly is troublesome. However, there is a problem in that it is difficult to assemble and maintain. Further, since the nut plate 6 occupies the space on the second board 2, there is a problem that the board mounting efficiency is reduced. On the other hand, if a commercially available connector is used instead of the conductive rubber connector 4, there is a problem that the gap size between the substrates becomes large.

The present invention has been made to solve the above problems, and it is possible to reduce the number of parts, improve the assemblability and maintainability, and reduce the board mounting efficiency. It is an object of the present invention to obtain a circuit board device capable of preventing the above.

[0007]

According to another aspect of the present invention, there is provided a circuit board device in which connecting electrodes are provided on surfaces facing each other, and convex portions are provided on positions facing each other on end surfaces. And the first and second substrates, which are stacked with a space between each other, and the first and second substrates.
A holder interposed between the substrates, a conductive rubber connector held by the holder and interposed between the connection electrode portions of the first and second holders to connect the two to each other, and the first and second It has a convex part insertion hole in which an inclined part is provided so that the width dimension of the board in the stacking direction changes, and each convex part is inserted into the convex part insertion hole so that the width dimension becomes smaller in the holder. The fixing metal fitting is fixed to the holder by being slid along, and the fixing metal fittings fix the first and second substrates to the holder in a state in which each connection electrode portion is pressed against the conductive rubber connector.

In the circuit board device according to the second aspect of the present invention, the holder is provided with the metal fitting locking projection for locking the metal fitting, and the fixing metal fitting is provided with the locking hole into which the metal fitting locking projection is inserted. The fixing metal fitting is locked to the holder by engaging the metal fitting locking projection with the edge of the locking hole.

In the circuit board device according to the third aspect of the present invention, the circuit board device is provided with a stopper that abuts on the abutting portion of the fixing bracket and restricts the movement of the fixing bracket in the direction of removing from the holder. And a case for accommodating the second electrode, the holder, the conductive rubber connector and the fixing metal fitting.

In the circuit board device according to a fourth aspect of the present invention, at least one edge of the fixing member in the stacking direction of the first and second boards is bent at a predetermined angle.

In the circuit board device according to the fifth aspect of the present invention, the connection electrode portion, the convex portion, the conductive rubber connector and the fixing metal fitting are arranged symmetrically.

In the circuit board device according to a sixth aspect of the present invention, a pair of left and right fixing fittings are integrated.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1. 1 is an exploded perspective view showing a circuit board device according to Embodiment 1 of the present invention, and FIG. 2 is a plan view showing an assembled state of FIG.

In the figure, reference numeral 11 denotes a first substrate on the lower surface of which the connecting electrode portions 1a are provided symmetrically along the edge portions, and the length of the connecting electrode portion 1a on the end surface of the first substrate 11 is long. The convex portions 11b are provided symmetrically on both sides in the direction. Positioning holes 11c are provided in the first substrate 11 symmetrically. Reference numeral 12 is a second substrate having a connection electrode portion 12a facing the connection electrode portion 11a of the first substrate 11 provided on the upper surface, and the end surface of the second substrate 12 faces the convex portion 11b. The convex portion 12b is provided. In addition, the second substrate 12 has a positioning hole 12c.
Are provided symmetrically.

Reference numeral 13 is a holder interposed between the first and second substrates 11 and 12, and the holder 13 is provided with a positioning protrusion 13a to be inserted into the positioning holes 11c and 12c. Further, the holder 13 is provided with L-shaped metal fitting locking projections 13b and 13c which are symmetrically provided.

Reference numeral 14 denotes a connector insertion hole 13d of the holder 13.
Are two conductive rubber connectors that are connected to the connection electrode portions 11a and 12a and are connected to each other. These conductive rubber connectors 14 include, for example, a rubber base material and a large number of filaments each having a diameter of several 0.0 mm. It is embedded and has conductivity only in the stacking direction of the first and second substrates 11 and 12 (vertical direction in FIG. 1). The material of the base material is, for example, silicon rubber, and the material of the filament is, for example, nickel plated with gold.

Reference numeral 15 denotes a fixing metal fitting which is locked to the left and right of the holder 13 and fixes the first and second substrates 11 and 12 to the holder 13. The fixing fitting 15 has convex portions 11b and 12b. Two convex insertion holes 15a to be inserted
And a locking hole 15 into which one metal fitting locking projection 13c is inserted
b and are provided. The convex insertion hole 15a is provided with a tapered inclined portion so that the width dimension in the substrate stacking direction changes. Further, an abutting portion 15c bent at an angle smaller than 90 ° is provided at one end of the fixing metal fitting 15 in the longitudinal direction.

When assembling the above-described circuit board device, first, the conductive rubber connector 14 is set in the connector insertion hole 13d, and the holder 13 is sandwiched by the first and second boards 11 and 12. At this time, each positioning hole 11
Positioning protrusions 13a and 13b are respectively inserted into c and 12c to position the substrates 11 and 12 with respect to the holder 13.

Next, the protrusions 11a and 11b are formed in the protrusion insertion hole 1
5a, and one metal fitting locking projection 13c is inserted into the locking hole 15b. From this state, the convex insertion hole 1
The fixing member 15 is slid along the holder 13 in the direction in which the width dimension of 5a becomes smaller. As a result, the fixing bracket 1
One end of 5 and the edge of the locking hole 15b are engaged with the metal fitting locking projections 13b and 13c, respectively, and the fixing metal fitting 15 is locked to the holder 13. In addition, the first and second substrates 11, 1
2 is fixed to the holder 13, and the connection electrode portion 11
a and 12a are pressed and connected to the conductive rubber connector 14, respectively.

The substrates 11, 1 integrated in this way
As shown in FIG. 2, the 2 and the holder 13 are housed in a case 16 that constitutes the device housing. The case 16 is provided with a stopper 16a with which the contact portion 15c abuts,
As a result, the fixing bracket 1 in the direction of removing from the holder 13
5 movement is regulated.

In such a circuit board device, the boards 11, 12 and the holder 13 can be easily assembled without using screws and nuts, and the disassembly can be easily carried out in the reverse order of the above. Therefore, the number of parts can be reduced, and the assembling property and the maintainability can be improved, and further, the conductive rubber connector 14 and the connecting electrode part 11 can be obtained.
The connection with a and 12a can be performed well. Also,
The fixture 15 is arranged on the side surfaces of the substrates 11 and 12, and does not hinder the mounting, so that the mounting efficiency of the substrate can be prevented from lowering. The circuit board device using such a conductive rubber connector 14 is particularly effective for a portable wireless device or the like, which requires miniaturization and thinning.

Embodiment 2. Next, FIG. 3 is a perspective view showing a fixing member according to a second embodiment of the present invention, and the other structure is the same as that of FIG. In this example, the fixing metal fitting 15 is provided with a convex portion insertion hole 15d having an inclined portion only on one side. By using the projection insertion hole 15d having such a shape, the fixing metal fitting 15 can be downsized.

Embodiment 3. 4 is a perspective view showing a fixing member according to a third embodiment of the present invention. In this example,
One end edge of the fixture 15 is bent to have an L-shaped cross section. In this way, if the size of the convex insertion hole 15a can be secured, the dimension of the first and second substrates 11 and 12 of the fixing member 15 in the stacking direction can be reduced by bending the edge portion, and the bending can be performed. Since the part functions as a strength member, the strength of the fixing member 15 can be secured. Further, the operation of the fixture 15 is the same as in FIG. Therefore,
It is possible to suppress the protrusion of the fixing member 15 in the stacking direction of the first and second substrates 11 and 12, and it is possible to reduce the overall thickness. In addition, in the third embodiment, the edge portion has a cross section L.
Although a bent shape is shown, the same effect can be obtained even if the bending angle is not 90 °.

Fourth Embodiment In the example of FIG. 5, the shape of the convex insertion hole of the fixing member 15 of FIG. 4 is the same as that of FIG.
Therefore, the fixing metal fitting 15 can be downsized, and the overall thickness can be further reduced.

Embodiment 5. Also, as shown in FIG.
The fixing metal fitting 15 can also be miniaturized by bending both end edges to make the entire fixing metal fitting 15 into a U-shaped cross section.

Sixth Embodiment In the example of FIG. 7, the shape of the convex insertion hole of the fixing member 15 of FIG. 6 is the same as that of FIG. Therefore, the fixing member 15 can be made smaller than that of FIG.

Embodiment 7. Next, FIG. 8 is a perspective view showing a fixing member according to a seventh embodiment of the present invention. In the figure, 21 is the left and right fixing brackets 15 in the first embodiment.
Is a fixing metal fitting that is integrated with the fixing metal fitting 21.
In order to insert b into the protrusion insertion hole 15a and the locking hole 15b, it is elastically deformable to some extent.

According to such a fixing member 21, it can be attached and detached in one operation, and the assembling property and the maintainability can be further improved. Further, the first fitting 11 can be protected by the fixing metal fitting 21.

Embodiment 8. FIG. 9 shows an example in which the shape of the convex insertion hole 15a of the fixing metal fitting 21 shown in FIG. 8 is changed in the same manner as in FIG. 3, whereby the fixing metal fitting 21 can be miniaturized.

Although the fixing fittings are attached symmetrically in the above example, they may be asymmetrical. It is also possible to apply the attachment by the fixing metal fitting of the present invention to only one of the left and right sides.

Further, in the above example, the fixed metal fitting is locked by the metal fitting locking projection 13b, but it can be locked by other means. Furthermore, the number and positions of the connection electrode parts are not limited to the above example.

[0032]

As described above, according to the circuit board device of the first aspect of the present invention, the board and the holder can be easily assembled and disassembled without using screws or nuts.
The number of parts can be reduced, and the assembling property and the maintainability can be improved, and moreover, the conductive rubber connector and the connection electrode part can be satisfactorily connected. Also, the fixing metal fittings are arranged on the side surface of the board,
Since it does not hinder the mounting, it is possible to prevent a reduction in the board mounting efficiency.

A circuit board device according to a second aspect of the invention is
The holder is provided with a metal fitting locking projection, and the fixing metal fitting is provided with a locking hole into which the metal fitting locking projection is inserted. Since it is locked to the holder, the fixture can be securely held in the holder with a simple structure.

Further, the circuit board device according to a third aspect of the present invention is integrated with a case provided with a stopper that abuts on an abutting portion of the fixing metal fitting and restricts movement of the fixing metal fitting in a direction of removing from the holder. Since the first and second electrodes, the holder, the conductive rubber connector, and the fixing metal fitting are accommodated, the fixing metal fitting does not move after being housed in the case, and the fixing metal fitting is accidentally removed due to vibration or the like, and the device is disassembled. There is nothing to do.

Furthermore, in the circuit board device according to a fourth aspect of the present invention, at least one of the edges of the fixing member in the stacking direction of the first and second boards is bent at a predetermined angle. The fixing bracket can be downsized, and the entire device can be thinned.

The circuit board device according to the invention of claim 5 is
Since the connection electrode portion, the convex portion, the conductive rubber connector and the fixing metal fitting are symmetrically arranged in a pair, the first and second substrates can be stably fixed to the holder, and the conductive rubber connector and the connection electrode portion can be fixed. The pressure contact state with is also stable.

In the circuit board device according to the sixth aspect of the present invention, since the pair of left and right fixing fittings are integrated, the fixing fittings can be easily attached and detached in one operation.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a circuit board device according to a first embodiment of the present invention.

FIG. 2 is a plan view showing an assembled state of FIG.

FIG. 3 is a perspective view showing a fixing member according to a second embodiment of the present invention.

FIG. 4 is a perspective view showing a fixing fitting according to Embodiment 3 of the present invention.

FIG. 5 is a perspective view showing a fixing member according to a fourth embodiment of the present invention.

FIG. 6 is a perspective view showing a fixing member according to a fifth embodiment of the present invention.

FIG. 7 is a perspective view showing a fixing member according to a sixth embodiment of the present invention.

FIG. 8 is a perspective view showing a fixing fitting according to Embodiment 7 of the present invention.

FIG. 9 is a perspective view showing a fixing member according to an eighth embodiment of the present invention.

FIG. 10 is an exploded perspective view showing an example of a conventional circuit board device.

[Explanation of symbols]

11 1st board | substrate, 11a, 12a connection electrode part, 11
b, 12b convex part, 12 second substrate, 13 holder,
13b, 13c Metal fitting locking protrusions, 14 Conductive rubber connector, 15 Fixing metal fittings, 15a, 15d Projection insertion holes,
15b Locking hole, 15c Abutment part, 16 Case, 16
a Stopper.

Claims (6)

(57) [Claims] 1. A first electrode and a second electrode, each of which is provided with a connecting electrode portion on a surface facing each other and a convex portion on a position facing each other on an end surface, and which are stacked at intervals. Substrate, a holder interposed between the first and second substrates, and a conductive member which is held by the holder and is interposed between the connection electrode portions of the first and second holders to mutually connect the two. And a convex rubber insertion hole in which a sloped portion is provided so that the width dimension of the first and second substrates in the stacking direction changes, and each convex portion is provided in the convex portion insertion hole. By inserting and sliding the holder along the holder in the direction in which the width is reduced, the holder is locked by the holder, and the connection electrode portions are pressed against the conductive rubber connector, respectively, and the first and second The substrate of the above holder A circuit board device, comprising: a fixing bracket that is fixed to the. 2. The holder is provided with a metal fitting locking projection for locking the metal fitting, and the fixing metal fitting is provided with a locking hole into which the metal fitting locking projection is inserted. The circuit board device according to claim 1, wherein the fixing metal fitting is locked to the holder by engaging with an edge portion of the locking hole. 3. A first electrode and a second electrode, which are integrated with each other, provided with a stopper that abuts on an abutting portion of the fixing bracket and restricts movement of the fixing bracket in a direction of removing from the holder.
The circuit board device according to claim 1 or 2, further comprising a case that accommodates the holder, the conductive rubber connector, and the fixing bracket. 4. The fixing metal fitting according to claim 1, wherein at least one end edge portion in the stacking direction of the first and second substrates is bent at a predetermined angle. The circuit board device according to any one of 1. 5. The circuit board device according to claim 1, wherein the connection electrode portion, the convex portion, the conductive rubber connector and the fixing metal piece are arranged symmetrically. 6. The circuit board device according to claim 5, wherein a pair of left and right fixing fittings are integrated.