WO2014002277A1

WO2014002277A1 - Circuit board for trial manufacture

Info

Publication number: WO2014002277A1
Application number: PCT/JP2012/066802
Authority: WO
Inventors: 摩梨花新山
Original assignee: 株式会社キビテク
Priority date: 2012-06-29
Filing date: 2012-06-29
Publication date: 2014-01-03
Also published as: JPWO2014002277A1

Abstract

[Problem] To configure a circuit board which is such a flexible circuit board as can be transformed by a human hand, enables the insertion and removal of a circuit component thereinto and therefrom by the human hand, and prevents the circuit component from easily detached from the circuit board. [Solution] A circuit board is configured by a plurality of members having electric conductivity, and a member which is produced from an elastomer and holds the members having electric conductivity in a positional relationship in which the members are not in contact with each other.

Description

Prototype circuit board

The present invention relates to a prototype circuit board in which circuit parts can be easily inserted and removed.

Previously, there was a prototype circuit board called a solderless breadboard. This is because the metal parts are lined up inside the resin molded product, and the circuit is configured by inserting the external lead of the circuit component into the hole opened in the resin molded product and making it conductive with the internal metal part To do. Parts can be inserted and removed with the help of human hands, and the circuit can be easily changed.

The resin molded product, which is the main component constituting this solderless breadboard, has conventionally used a hard resin, and it has been difficult to deform the shape of the solderless breadboard by human hands. As described above, with a hard solderless breadboard, in the process of prototyping a circuit board, the circuit board is made to conform to the curved shape of the surface of the housing, etc., is pushed into a narrow gap, and is easily adhered to the movable part. It is impossible to make it happen. For this reason, the prototype circuit configured with the solderless breadboard may have poor mechanical consistency with other components.

On the other hand, a circuit board has been proposed in which the main parts are made of an insulating fabric, conductive fibers, and the like, so that the whole is flexible (see Patent Document 1). However, because the circuit board made of this fabric has a structure in which the external lead of the circuit component is inserted when the external lead of the circuit component is inserted, the component is easily detached from the circuit board. There is a problem that the circuit changes unintentionally. In the case of the circuit board composed of the cloth, as a method of fixing the circuit component, the circuit component is soldered to the conductive fiber, or the circuit component is inserted into another circuit component pre-soldered. Has been proposed. However, these methods are complicated methods unlike the case where the circuit components are fixed only by inserting them manually like the solderless breadboard, and it is not easy to change the circuit.

JP-A-11-168268

The problem to be solved is to construct a circuit board in which the entire circuit board is flexible, circuit parts can be inserted and removed by human hands, and the circuit parts do not easily come off the circuit board. is there.

The main feature of the present invention is that a prototype circuit board is composed of a plurality of conductive (electrically conductive) members and an elastomer that holds the members.

Since the circuit board of the present invention holds a plurality of conductive members with an elastomer, it is flexible as a whole, and the circuit board conforms to the curved surface shape of the surface of the housing or the like, or is pushed into a narrow gap. It is possible to make it closely contact with each other. For this reason, it is possible to configure a prototype device having good mechanical consistency between the circuit board and other components.

In addition, since the circuit component can be held by the conductive member or the elastomer described above, the circuit component can be fixed simply by inserting the circuit component with a human hand, and the circuit board can be deformed. Even in such a case, it is possible to adopt a structure in which the circuit components are not easily detached from the circuit board. Thereby, it is possible to configure a circuit board in which the circuit does not change unintentionally.

A perspective view of the present invention (Example 1) A perspective view of the present invention (Example 3) Sectional view of the present invention (Example 1) Sectional view of the present invention (Example 2) Sectional view of sheet metal processed product 1005 (Example 2) Perspective view of sheet metal processed product 1005 (Example 2) Modified example of cross-sectional view of sheet metal processed product 1005 (Example 2) Modified example of cross-sectional view of sheet metal processed product 1005 (Example 2) Modified example of cross-sectional view of sheet metal processed product 1005 (Example 2)

(1001) a member made of elastomer, (1002) a conductive member, (1003) a circuit component, (1004) an external lead of the circuit component, (1005) a sheet metal processed product, (1006) a plate spring-shaped structure of the sheet metal processed product, (1007) Plate spring-like structure of processed sheet metal

FIG. 1 shows a first embodiment of the present invention. A plurality of conductive members 1002 are arranged and held by a member 1001 made of an elastomer which is a rubber-like elastic material. The member 1001 made of the elastomer has a shape covering the entire periphery of the conductive member 1002. In other words, the conductive member 1002 is completely embedded inside the member 1001 made of elastomer. Each of the plurality of conductive members 1002 is held without being in contact with each other. The whole including the conductive member 1002 and the member 1001 made of elastomer has a flat plate shape and constitutes a circuit board.

The state of the cross section of the circuit board is shown in FIG. The external lead 1004 can be brought into contact with the conductive member 1002 by inserting the external lead 1004 of the circuit component 1003 into the circuit board from the upper surface of the circuit board. The external lead 1004 may come into contact with the conductive member 1002 or may come into contact with the side surface.

The elastomer is, for example, silicone rubber, natural rubber, EPDM, urethane rubber, isoprene rubber, butyl rubber, etc., and has such flexibility that it can be easily bent by the power of human hands. Moreover, the foam of these elastomer materials may be sufficient. Further, the member made of 1001 elastomer may include a material other than the elastomer in a part thereof.

The conductive member 1002 is, for example, a conductive material such as conductive fiber, conductive foamed resin, conductive rubber, conductive liquid, gel, colloid, etc. that has a flexibility that can be easily bent by the power of a human hand. Alternatively, among conductive materials having fluidity, it is desirable that when a plurality of lead wires 1004 are brought into contact with the conductive material, the resistance value between the lead wires 1004 is 100Ω or less.

3 is embedded in a member 1001 made of an elastomer. The external lead 1004 is brought into contact with the conductive member 1002 by penetrating the member 1001 made of elastomer. A hole is not provided in the member 1001 made of an elastomer in advance, but a hole is made in the member 1001 made of an elastomer by pressing the external lead 1004. By adopting this structure, the member 1001 made of elastomer is pressed against the surface of the external lead 1004 of the circuit component in an attempt to restore the original shape, so that the external lead 1004 of the circuit component is pulled out upward in FIG. Friction force is generated in the direction to prevent. As a result, a circuit board in which the circuit component 1003 is not easily detached from the circuit board can be realized.

The member 1001 made of the elastomer may have a structure in which holes for allowing the external leads 1004 to pass therethrough are provided in advance. Further, the structure may be such that the external lead 1004 can be easily inserted by providing a recess in the member 1001 made of the elastomer instead of the through hole.

FIG. 4 shows a second embodiment of the present invention. The conductive member 1002 is a sheet metal processed product 1005 having a cross-sectional shape shown in FIG. A perspective view of the sheet metal processed product 1005 is shown in FIG. This sheet metal processed product 1005 has a U-shaped cross section. The sheet metal processed product 1005 includes a bottom plate 1008 (vertical bar portion of “U” shape) and two leaf spring-

like structures

1006 and 1007. The bottom plate 1008 is a rectangular thin plate. The

leaf spring structures

1006 and 1007 are also rectangular thin plates, and their upper ends are folded outward. The material of each member is a conductive elastic body such as an iron alloy. The lower end of the leaf spring-like structure 1006 is joined to the left end of the bottom plate 1008 so as to form an angle slightly smaller than a right angle. The lower end of the leaf spring-like structure 1007 is joined to the right end of the bottom plate 1008 so as to form an angle slightly smaller than a right angle. The distance between the upper ends of the two

leaf spring structures

1006 and 1007 is narrower than the thickness of the external lead 1004. When the external lead 1004 is inserted into the gap between the upper ends of the two

leaf spring structures

1006 and 1007, the distance between the two leaf spring structures increases, but the two leaf spring structures are elastic, The lower end is connected to the bottom plate, so it tries to return to the original interval. Thereby, a frictional force acts between the external lead 1004 and the leaf spring-like structure. In addition, since the upper ends of the two leaf spring-like structures are folded back, even if the position of the external lead is slightly shifted, it is guided to the gap. By adopting the above-described structure, it is possible to prevent the external lead from being pulled out upward in FIGS. 6 and 5 due to frictional force, and it is possible to prevent a failure or an unexpected operation due to the circuit component falling unintentionally. Moreover, even if some deformation occurs in the circuit board, the external leads 1004 and the sheet metal processed product 1005 are in contact with each other without being separated, so that an electrically conductive state is maintained, and an unexpected disconnection can be prevented.

The sheet metal processed product 1005 is housed in a gap provided in advance in a member 1001 made of an elastomer. By embedding the sheet metal processed product 1005 in the gap provided in advance, it is possible to prevent the elastomer from entering between the sheet metal processed product 1005 and the external lead 1004 and disconnecting electrically compared to the case where it is not. Can do. In addition, this space | gap may be a space | gap narrow so that the sheet-metal processed product 1005 and an elastomer contact | adhere. Further, the sheet metal processed product 1005 may be bonded so that the bottom plate 1008 touches the member 1001 made of an elastomer, or is not bonded and is installed so that the left and right are sandwiched by the elastomer as shown in FIG. It may be only.

The position of the circuit component 1003 is changed between the leaf spring-like structure 1006 of the sheet metal workpiece 1005 and the external lead 1004 and the frictional force acting between the leaf spring-like structure 1007 of the sheet metal workpiece 1005 and the external lead 1004. A force is applied in a direction that prevents the substrate from changing. As a result, a circuit board in which the circuit component 1003 is not easily detached from the circuit board can be realized.

Note that the cross-sectional shape of the sheet metal processed product 1005 is not a “U” shape, and may be a shape in which a part of the “concave” character is missing as shown in FIG. 7. In this case, the upper ends of the leaf spring-

like structures

1006 and 1007 of the processed sheet metal product 1005 are folded in the opposite direction to the case of FIG. As a result, even when the position pointing to the external lead 1004 is shifted in the left-right direction in FIG. 7, the outer end is placed in the gap between the leaf spring-

like structures

1006 and 1007 at the center upper end in FIG. Since the lead 1004 is easy to enter, if the external lead 1004 enters other than the gap between the

external structures

1006 and 1007, the force to hold the external lead 1004 does not work, and the components may fall off or the circuit may be disconnected. prevent.

Also, as shown in FIG. 8 and FIG. 9, the top and bottom of FIG. 5 and FIG. 7 may be reversed so that the free end of the leaf spring-like structure exists on the lower side. In this case, there is no portion corresponding to the bottom plate 1008, and the leaf spring-

like structures

1006 and 1007 are folded in the vicinity of the center in the vertical direction and are directly coupled on the upper side. The external lead 1004 of the circuit component is inserted along the right side or the left side of the processed sheet metal product 1005 until reaching the lower side of the leaf spring-

like structures

1006 and 1007. Due to the elasticity of the leaf spring-like structure, the external lead 1004 is sandwiched between the leaf spring-

like structure

1006 or 1007 and the member 1001 made of elastomer, and a frictional force acts in a direction to prevent the position of the external lead 1004 from changing. . As a result, it is possible to prevent malfunctions and unexpected operations caused by unintentional dropout of circuit components.

In the case of FIGS. 8 and 9, unlike the cases of FIGS. 5 and 7, the external lead 1004 does not hit the bottom surface 1008. Therefore, the external lead 1004 penetrates the upper and lower surfaces of the member made of elastomer, and the external lead 1004 can be exposed on the lower surface of the entire circuit board. This makes it easy to pierce all circuit components 1003 having external leads 1004 of various lengths until they hit the elastomer member 1001, so that the user can make a circuit with less wobbling of the circuit components 1003. . As a result, it is possible to prevent malfunctions and unexpected operations caused by unintentional dropout of circuit components.

It should be noted that the external lead 1004 may have a structure in which a force is applied in a direction to prevent the position of the circuit component 1003 relative to the circuit board from the member 1001 made of elastomer, in addition to the sheet metal processed product 1005.

FIG. 2 shows a third embodiment of the present invention. This embodiment shows a case where the member 1001 made of elastomer does not cover the entire periphery of the conductive member 1002 in the first embodiment. This embodiment shows a case where no force is applied to the external lead 1003 from the member 1001 made of elastomer as described in claim 2 among the circuit boards described in claim 1. As shown in FIG. 2, the member 1001 made of an elastomer has a structure in which the conductive member 1001 is exposed to the outside on the upper surface and the lower surface when the entire circuit board is regarded as a flat plate. In the case of a shape in which the conductive member 1002 is embedded in the elastomer, there are cases where it is necessary to use molding means with relatively high manufacturing difficulty such as integral molding. On the other hand, in the case of the present embodiment, there is an advantage that the manufacturing is relatively easy, such as a form in which the conductive member 1002 is assembled to the member 1001 made of separately molded elastomer.

In addition, the surface from which the conductive member 1001 is exposed to the outside may be any one of a top surface, a bottom surface, and a side surface of a flat plate, or a combination thereof.

Claims

A plurality of electrically conductive members;
A member made of an elastomer having a structure that fills part or the whole of the gap between the electrically conductive members so that the electrically conductive members are held in a positional relationship where they do not contact each other. Feature circuit board.
2. The circuit board according to claim 1, wherein when an external lead of a circuit component is brought into contact with the electrically conductive member, the member made of the elastomer has a shape in contact with the external lead.
The circuit board according to claim 1, wherein the circuit board is a member made of a material other than an electrical conductor, and the electrically conductive member is covered around the entire periphery.
The circuit board according to claim 1, wherein the electrically conductive member has a gap whose interval is variable by an elastic force.