JP2014067784A - Electrical equipment including substrate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent wear of a protective member that protects an electrical component detecting the fitting state of a connector, in a connector unit including the protective member.SOLUTION: Electrical equipment 1 includes: a substrate 10 on which a conductive pattern 11 is formed; a case 20 including a first case body 21 positioned on the surface side, where the conductive pattern 11 is formed, of the substrate 10 and a second case body 22 positioned on the rear surface side of the substrate 10 and engaged to the first case body 21; an electric wire 30 having a core wire 31 in contact with the conductive pattern 11; and a pressing member 40 sandwiched between the substrate 10 and the first case body 21 to be elastically deformed and pressing the core wire 31 to the conductive pattern 11 by the elastic force.

Description

  The present invention relates to a substrate and an electric device including an electric wire electrically connected to a conductive pattern formed on the substrate.

  As such a connection structure between a substrate and an electric wire, one described in Patent Document 1 below is known. This patent document 1 discloses a configuration in which a core wire is brought into contact with a conductive pattern formed on a substrate by sandwiching the core wire of an electric wire between upper and lower cases. Furthermore, a configuration in which a rib for pressing the core wire against the conductive pattern is formed on the upper case or the lower case as a modified example thereof is also disclosed. Moreover, the structure which connects a core wire and a conductive pattern with solder | pewter is disclosed.

JP 2012-135092 A

  However, if it is set as the structure which pinches | interposes the core wire of an electric wire etc. with a hard upper case and a lower case like patent document 1, there exists a possibility that a core wire may spread. If such a core wire breaks off, there arises a problem that a part of the core wire comes into contact with another circuit and short-circuits, or the pressure for pressing the core wire against the conductive pattern becomes insufficient and the contact resistance increases. Further, when the core wire and the conductive pattern are connected by solder, a solder connection step is required, and there is a problem that labor and cost of testing and quality control of the connection portion are required.

  The present invention is an electric device including a board and an electric wire electrically connected to the conductive pattern formed on the board, and the reliability of the electrical connection between the core wire of the electric wire and the connection portion of the conductive pattern of the board is high. An object of the present invention is to provide a device that is expensive and can easily perform the connection.

  In order to solve the above-described problems, an electric device including a substrate according to the present invention includes a substrate on which a conductive pattern is formed, a first case body positioned on the surface side on which the conductive pattern of the substrate is formed, and the substrate A case that has a second case body that is located on the back surface side and that engages with the first case body, an electric wire that has a core wire that contacts the conductive pattern, and is elastically sandwiched between the substrate and the first case body And a pressing member that is deformed and presses the core wire against the conductive pattern by its elastic force.

  The guide member further includes a guide member that is positioned with respect to the second case body or the substrate and is positioned on the surface side of the substrate, and the pressing member is open to a penetrating portion formed in the guide member or the substrate side. What is necessary is just to be inserted inside the recessed part.

  The guide member only needs to have a guide groove through which the electric wire passes.

  Further, the second case body is formed with an insertion portion for inserting an electric wire inside the case, and the insertion portion is formed at a height position different from the guide groove, so that both portions It is sufficient that the electric wire passing through is bent.

  According to the present invention, the pressing member that is elastically deformed by being sandwiched between the substrate and the first case body causes the core wire of the electric wire to be pressed against the conductive pattern of the substrate, so that the core wire and the conductive pattern are electrically connected. Connected. Since the core wire of the electric wire is pressed against the conductive pattern against the member that is elastically deformed in this way, the core wire is not scattered, and the connection reliability is excellent. Further, the core is brought into contact with the conductive pattern by being pressed by the pressing member that is elastically deformed by housing the substrate between the first case body and the second case body (fixing the first case body to the second case body). Therefore, the conductive pattern and the core wire can be connected together with the assembly of the case (accommodation of the substrate and the electric wire).

  In addition, if a guide member that is positioned with respect to the second case body or the substrate is provided, and the guide member is formed with a through-hole into which the pressing member is inserted or a recess that is open on the substrate side, It becomes easy to position the pressing member at a position in contact with.

  Further, if the guide member is formed with a guide groove through which the electric wire is passed, positioning of the electric wire is facilitated. That is, the guide member facilitates positioning of both the pressing member and the electric wire.

  Further, if the insertion portion formed in the second case body and the guide groove formed in the guide member are set at different heights and the wire passing through both parts is configured to bend, the position of the wire Deviation can be prevented and the device is suitable for installation in a vibration environment. That is, the guide member is a member that exhibits a function of preventing positional displacement in the length direction of the electric wire in addition to the positioning function of the pressing member and the electric wire.

It is an external view of an electric equipment provided with the board | substrate concerning one Embodiment of this invention. It is an exploded view of an electric equipment provided with the board concerning one embodiment of the present invention. It is a figure for demonstrating the procedure of assembling an electric equipment provided with the board | substrate concerning one Embodiment of this invention. It is sectional drawing which showed typically the part which the core wire of an electric wire and a conductive pattern contact in an electric equipment provided with the board | substrate concerning one Embodiment of this invention, (a) is a 1st case body in a 2nd case body. The state before being fixed, (b) shows the state after the first case body is fixed to the second case body. It is sectional drawing which showed typically the part which the core wire of an electric wire and a conductive pattern contact in an electric equipment provided with the board | substrate concerning a 1st modification, (a) is a 1st case body being fixed to a 2nd case body. (B) shows a state after the first case body is fixed to the second case body. It is sectional drawing which showed typically the part which the core wire of an electric wire and a conductive pattern contact in an electric equipment provided with the board | substrate concerning a 2nd modification, (a) is a 1st case body being fixed to a 2nd case body. (B) shows a state after the first case body is fixed to the second case body.

  Hereinafter, embodiments of the present invention will be described. In the following description, the vertical direction simply means the Y-axis direction (the first case body 21 side is the upper side and the second case body 22 side is the lower side), and the width direction is the X-axis direction shown. The direction is the direction, and the front-rear direction is the Z-axis direction shown in the figure.

  An electrical apparatus 1 including a substrate according to the present embodiment whose entire configuration is shown in FIGS. 1 and 2 includes a substrate 10, a case 20, an electric wire 30, and a pressing member 40. A conductive pattern 11 is formed on the surface (upper surface) of the substrate 10. The electric wire 30 (core wire 31) is electrically connected to a predetermined position of the conductive pattern 11 (hereinafter, a portion where the electric wire 30 (core wire 31) in the conductive pattern 11 is to be connected is referred to as a connection portion. (Only the connection part in the conductive pattern 11 is displayed in FIG. 5 and other parts are omitted). The configuration of the conductive pattern 11 (the purpose and function of the circuit configured by the conductive pattern 11) is not limited to a specific one. In the present embodiment, a connector 12 electrically connected to the conductive pattern 11 is mounted on the substrate 10.

  The case 20 has a first case body 21 and a second case body 22. The first case body 21 is located on the front side (upper side) of the substrate 10, and the second case body 22 is located on the back side (lower side) of the substrate 10. The second case body 22 is a box-shaped member in which the accommodation space S is formed on the inner side and the upper side is opened. The first case body 21 is a lid that covers the opening of the second case body 22. The substrate 10 is accommodated in the accommodation space S formed inside the second case body 22 (the substrate 10 is placed on the bottom of the second case body 22). The substrate 10 is positioned with respect to the second case body 22. The positioning method is not limited to a specific method. For example, the substrate 10 may be positioned with respect to the second case body 22 by forming a positioning protrusion on the bottom of the second case body 22 and forming a positioning hole through which the positioning protrusion is passed. An engaging claw 211 extending downward is provided on the outer edge of the first case body 21, and the engaging claw 211 is passed through an engaging hole 221 provided outside the second case body 22, When the claw is hooked, the two case bodies are engaged (the first case body 21 is fixed to the second case body 22).

  An insertion portion 222 that is recessed downward from the upper edge is formed in one of the side walls (portion that is substantially orthogonal to the bottom) of the second case body 22. As will be described later, the end of the electric wire 30 on the side where the core wire 31 is formed is located in the accommodation space S through the insertion portion 222. In the present embodiment, the connector engaging portion 223 into which the connector 12 mounted on the substrate 10 is fitted is formed on one side wall other than the side wall on which the insertion portion 222 is formed. The connector 12 is exposed to the outside of the case 20 through the connector engaging portion 223, and a mating connector (not shown) can be fitted.

  In the electric wire 30, the core wire 31 is covered with a sheath 32 (covering member), and the core wire 31 is exposed at the end thereof. When the exposed core wire 31 contacts the conductive pattern 11, the electric wire 30 (core wire 31) and the conductive pattern 11 (circuit) are electrically connected. The electric wire 30 is passed through the insertion portion 222 formed in the second case body 22, and the exposed core wire 31 enters the accommodation space S.

  The pressing member 40 is an elastic member (for example, rubber) formed of an insulating material. In this embodiment, the pressing member 40 is installed in the accommodation space S in a state where the pressing member 40 is positioned on the guide member 50 as follows. The guide member 50 is a member formed of a hard insulating material that is positioned with respect to the second case body 22 or the substrate 10. In the present embodiment, the positioning recesses 51 are formed on both sides in the width direction of the guide member 50, and the positioning protrusions 224 are formed on the inner side of the side wall along the width direction of the second case body 22. Is engaged, the guide member 50 is positioned in the accommodation space S in a state of being positioned on the second case body 22 (see FIG. 3D). Although not shown, the guide member 50 may be positioned with respect to the substrate 10 by forming positioning protrusions and positioning holes in the substrate 10 and forming elements that engage with the guide member 50 in advance. Since the guide member 50 is accommodated after the substrate 10 is accommodated in the accommodation space S, the guide member 50 is located on the surface side of the substrate 10 (the side on which the conductive pattern 11 is formed).

  The guide member 50 is formed with a pressing member insertion hole 52 which is a penetrating portion penetrating in the vertical direction. The pressing member insertion hole 52 only needs to penetrate in the vertical direction (for example, it may open in the front-rear direction or the width direction). As described above, when the guide member 50 is positioned with respect to the second case body 22 or the substrate 10, the pressing member insertion hole 52 overlaps the connection portion of the conductive pattern 11 in the vertical direction (from above the pressing member insertion hole 52. At least a part of the connection part of the conductive pattern 11 is visible). The pressing member 40 is inserted into the pressing member insertion hole 52. The length in the vertical direction of the pressing member 40 in the undeformed state (natural state) is the state in which the first case body 21 and the second case body 22 are integrated (the engagement claw 211 is hooked on the engagement hole 221). The distance from the surface (connection part) of the substrate 10 accommodated in the second case body 22 to the lower surface (surface on the substrate 10 side) of the first case body 21 is set to be smaller.

  A guide groove 53 extending in the front-rear direction is formed on the lower side of the guide member 50. The electric wire 30 is passed inside the guide groove 53. Accordingly, the portion passing through the guide groove 53 is sandwiched between the guide member 50 and the substrate 10. In a state where the guide member 50 is accommodated at a predetermined position in the accommodation space S of the second case body 22 (a state where the lower surface is in contact with the surface of the substrate 10), the guide groove 53 is formed by the insertion portion 222 of the second case body 22. Is also located below. The electric wire 30 enters the accommodation space S (in the case 20) through the insertion portion 222 formed in the second case body 22, and is guided through the guide groove 53 to a position where the core wire 31 overlaps the connection portion of the conductive pattern 11. The Therefore, the part from the part located in the outer side of the case 20 in the electric wire 30 to the core wire 31 is bent by the difference in height between the insertion portion 222 and the guide groove 53. Specifically, a portion along the vertical direction sandwiched between the guide member 50 and the side wall of the second case body 22 exists between a portion passing through the insertion portion 222 along the front-rear direction and a portion passing through the guide groove 53. (See FIG. 4B).

  The electric device 1 including the substrate having such a configuration is assembled as follows, for example. First, the board | substrate 10 is accommodated in the predetermined position in the accommodation space S inside the 2nd case body 22 (Fig.3 (a)-> FIG.3 (b)). Next, the end of the electric wire 30 on the side where the core wire 31 is exposed is positioned in the accommodation space S through the insertion portion 222 of the second case body 22 (FIG. 3B → FIG. 3C). Then, the guide member 50 is positioned with respect to the second case body 22 or the substrate 10. When the guide member 50 is moved toward the substrate 10, the electric wire 30 is positioned inside the guide groove 53 and the electric wire 30 is bent. When the guide member 50 is positioned at a predetermined position, the core wire 31 of the electric wire 30 is overlapped with the connection portion of the conductive pattern 11 in the vertical direction. Thereafter, the pressing member 40 is inserted into the pressing member insertion hole 52 of the guide member 50 (FIG. 3C → FIG. 3D). The pressing member insertion hole 52 is set so as to overlap with at least a part of the connection portion of the conductive pattern 11. Under the pressing member 40 inserted into the pressing member insertion hole 52, at least a part of the core wire 31 of the electric wire 30. Is located. That is, at least a part of each of the three members of the pressing member 40 (the pressing member insertion hole 52), the core wire 31 of the electric wire 30, and the connection portion of the conductive pattern 11 is overlapped in the vertical direction.

  As described above, the length of the pressing member 40 not deformed in the vertical direction is such that the first case body 21 and the second case body 22 are integrated (the engaging claw 211 is hooked on the engaging hole 221). The distance from the surface of the substrate 10 accommodated in the second case body 22 to the lower surface of the first case body 21 is set to be smaller. Therefore, in the state where the first case body 21 is not fixed to the second case body 22, the upper end portion of the pressing member 40 inserted into the pressing member insertion hole 52 is the upper end of the second case body 22 ( It protrudes above the upper end of the side wall (see FIGS. 3D and 4A). Therefore, when the first case body 21 is fixed to the second case body 22 (the engaging claw 211 is hooked in the engaging hole 221), the upper end of the pressing member 40 comes into contact with the lower surface of the first case body 21. The pressing member 40 is crushed in the vertical direction (see FIG. 4B). When the pressing member 40 is crushed by the first case body 21 fixed to the second case body 22 in this way, the elastic force of returning to the original shape of the pressing member 40 causes the lower part of the pressing member 40 to move downward. The core wire 31 of the electric wire 30 positioned at is pressed against the connection site of the conductive pattern 11. That is, the connection part of the core wire 31 of the electric wire 30 and the conductive pattern 11 contacts, and both are electrically connected. The elastic force of the pressing member 40 that affects the connection reliability between the two is changed by appropriately changing the type of the pressing member 40 and the amount by which the pressing member 40 is crushed (that is, the length of the pressing member 40 in the vertical direction). be able to. That is, by adjusting the elastic force of the pressing member 40, sufficient contact pressure between the contacted core wire 31 and the connection portion (terminals necessary for obtaining a sufficiently reliable electrical connection is pressed against the conductive pattern 11. Pressure).

  In the above embodiment, in the state where the first case body 21 is not fixed to the second case body 22, the upper end portion of the pressing member 40 inserted into the pressing member insertion hole 52 is the second case. Although it has been described that the body 22 protrudes above the upper end (the upper end of the side wall), the protrusion of the pressing member 40 is not formed on the lower surface of the first case body 21 in this way. It may be provided. That is, when a protrusion protruding downward is formed on the lower surface of the first case body 21 and the first case body 21 is fixed to the second case body 22, the pressing member 40 is pressed downward by the protrusion. It is good also as a structure (a protrusion penetrates into the pressing member insertion hole 52).

  According to the electric device 1 including the substrate according to the present embodiment described above, the following operational effects are exhibited.

  In the said embodiment, when the said press member 40 is pinched | interposed between the board | substrate 10 and the 1st case body 21, and the elastic wire deform | transforms, the core wire 31 of the electric wire 30 becomes the conductive pattern 11 (connection site | part of the conductive pattern 11) of the board | substrate 10. The core wire 31 and the conductive pattern 11 are electrically connected to each other. Since the core wire 31 of the electric wire 30 is pressed against the conductive pattern 11 against the elastically deforming member in this way, the core wire 31 is not scattered as in the case where the core wire 31 is pressed with a hard member, and connection reliability is improved. Excellent. Further, when the substrate 10 is accommodated between the first case body 21 and the second case body 22 (the first case body 21 is fixed to the second case body 22), it is pushed by the pressing member 40 that is elastically deformed. Since the core wire 31 comes into contact with the conductive pattern 11, the conductive pattern 11 and the core wire 31 can be connected together with the assembly of the case 20 (accommodation of the substrate 10 and the electric wire 30).

  Further, a guide member 50 that is positioned with respect to the second case body 22 or the substrate 10 is provided, and a pressing member insertion hole 52 that is a through portion into which the pressing member 40 is inserted is formed in the guide member 50. Therefore, it is easy to position the pressing member 40 at a position in contact with the core wire 31 of the electric wire 30.

  Moreover, since the guide groove 53 through which the electric wire 30 is passed is formed in the guide member 50, the electric wire 30 can be easily positioned. That is, the guide member 50 facilitates positioning of both the pressing member 40 and the electric wire 30.

  Further, the insertion portion 222 formed in the second case body 22 and the guide groove 53 formed in the guide member 50 are set at different heights, and the electric wire 30 passing through both portions is bent. Therefore, it is possible to prevent the displacement of the electric wire 30 in the length direction, and the device is suitable for installation in a vibration environment. That is, the guide member 50 is a member that exhibits a function of preventing the positional deviation of the electric wire 30 in the length direction in addition to the positioning function of the pressing member 40 and the electric wire 30.

  As a modification of the electric apparatus 1 including the substrate according to the present embodiment, the following configuration is conceivable.

  As in the electric device 1a including the substrate according to the first modification shown in FIG. 5, the portion of the guide member 50a into which the pressing member 40a is inserted may not be a penetration portion but may be a recess. The recess 52a formed in the guide member 50a (hereinafter, the guide member is referred to as the guide member 50a in the first modification) is a recess that opens downward (on the substrate 10 side). A pressing member 40a (hereinafter, the pressing member is referred to as a pressing member 40a in the first modification) is inserted into the portion. The guide member 50a in the first modification is formed of an elastic material, and protrudes upward on the upper side of the concave portion 52a, the core wire 31 of the electric wire 30, and the connection portion of the conductive pattern 11 in the vertical direction. It has a protrusion 54a. The protrusion 54 a protrudes above the upper end of the second case body 22. Therefore, when the first case body 21 is fixed to the second case body 22, the protrusion 54a of the guide member 50a in the first modification contacts the lower surface of the first case body 21, and the protrusion 54a is It is crushed. Therefore, the upper surface (surface opposite to the opening) of the recess 52a of the guide member 50a in the first modification protrudes downward, and the pressing member 40a in the first modification accommodated in the recess 52a is also crushed. That is, the pressed member 40 a in the first modified example presses the core wire 31 of the electric wire 30 against the connection portion of the conductive pattern 11 by the elastic force to return to the original state. Thereby, the core wire 31 of the electric wire 30 and the conductive pattern 11 are electrically connected. As described above, the portion of the guide member 50a into which the pressing member 40a is inserted may be the recess 52a that opens downward instead of the penetrating portion.

  In the first modification, the guide member 50a is provided with the protrusion 54a. However, the upper surface of the guide member 50a is flattened, the guide member 50a is pressed against the first case body 21, and the upper surface of the recess 52a is It is good also as a structure which provided the protrusion (protrusion which protrudes below from the lower surface of the 1st case body 21) made to protrude below.

  Like the electric device 1b including the substrate according to the second modification shown in FIG. 6, a member corresponding to the pressing member and the guide member in the above embodiment is a single member (hereinafter, the pressing member is pressed in the second modification). It may be constructed with a member 50b). The pressing member 50b in the second modified example is integrally formed of an elastic material, and protrudes upward on the upper portion of the pressing member 50b that overlaps the connecting portion of the core wire 31 and the conductive pattern 11 of the electric wire 30 in the vertical direction. It has a protrusion 54b. The projecting portion 54 b projects upward from the upper end of the second case body 22. Therefore, when the first case body 21 is fixed with respect to the second case body 22, the protrusion 54b of the pressing member 50b in the second modification contacts the lower surface of the first case body 21, and the protrusion 54b is It is crushed. Therefore, a portion of the lower surface of the pressing member 50b according to the second modification that overlaps with the protrusion 54b in the vertical direction protrudes downward, and presses the core wire 31 of the electric wire 30 against the connection portion of the conductive pattern 11. Thereby, the core wire 31 of the electric wire 30 and the conductive pattern 11 are electrically connected. Thus, it is also possible to adopt a configuration in which the core wire 31 of the electric wire 30 is pressed against the connection site by the single pressing member 50b.

  In the second modification, the protrusion 54b is provided on the guide member 50b. However, the upper surface of the guide member 50b is flattened, the guide member 50b is pressed against the first case body 21, and the lower surface of the guide member 50b. It is good also as a structure which provided the protrusion (protrusion which protrudes below from the lower surface of the 1st case body 21) which protrudes below.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

  For example, the configuration of the case 20 (the configuration of the first case body 21 and the second case body 22) can be changed as appropriate. Any structure may be used as long as the first case body 21 is fixed to the second case body 22 and the pressing member 40 is deformed by being pushed by the first case body 21.

  Moreover, although the core wire 31 connected to the connection site | part of the conductive pattern 11 demonstrated what was exposed at the edge part of the electric wire 30, it is the structure which connects the core wire 31 exposed in the intermediate part to the conductive pattern 11 Is also applicable.

DESCRIPTION OF SYMBOLS 1 Electric equipment provided with board | substrate 10 Board | substrate 11 Conductive pattern (connection part)
20 Case 21 First case body 22 Second case body 222 Insertion section 30 Electric wire 31 Core wire 32 Sheath 40 Pressing member 50 Guide member 52 Pressing member insertion hole 53 Guide groove

Claims (4)

A substrate on which a conductive pattern is formed;
A case having a first case body positioned on the front surface side where the conductive pattern of the substrate is formed, and a second case body positioned on the back surface side of the substrate and engaged with the first case body;
An electric wire having a core wire in contact with the conductive pattern;
A pressing member which is sandwiched between the substrate and the first case body and elastically deforms, and presses the core wire against the conductive pattern by the elastic force;
An electrical apparatus comprising a substrate, comprising: A guide member positioned with respect to the second case body or the substrate and positioned on the surface side of the substrate;
2. The electric device comprising the substrate according to claim 1, wherein the pressing member is inserted into a through portion formed in the guide member or a recess opened to the substrate side.   The electrical apparatus provided with the board according to claim 2, wherein a guide groove through which the electric wire is passed is formed in the guide member. The second case body has an insertion portion for inserting an electric wire inside the case,
The electric device provided with the substrate according to claim 3, wherein the insertion portion is formed at a height position different from the guide groove, whereby the electric wire passing through both portions is bent.

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