JP2007294112A - Electronic unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic unit of a plug-in type capable of protecting a junction part from repulsive force in assembling without molding a circuit substrate. <P>SOLUTION: Respective bus bar terminals 33-38 are held by providing lock plates 51 in front of a substrate main body part 20 which structures the circuit substrate P. Thereby, the repulsive force in assembling applied on the respective bus bar terminals 33-38 can be relieved to a side of a casing 60 before the repulsive force is transmitted to the substrate main body part 20. Furthermore, with this structure, only spaces for arranging the lock plates 51 are secured in front of the substrate main body part 20, reinforcement, for example, by molding the entire substrate main body part 20 is not required as conventional one, and a suitable structure for reducing a size of the unit can be obtained. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electronic unit.

2. Description of the Related Art Conventionally, a plug-in type electronic unit in which terminals (bus bars) protrude from one side surface of a casing in which a circuit board is accommodated is known (for example, Patent Document 1). Since this type of electronic unit is assembled by inserting the protruding terminal into the other electronic unit, the terminal and the circuit board are pushed into the casing by receiving a repulsive force. When such a repulsive force is applied, an excessive force may be applied to the circuit board. Therefore, in the thing of patent document 1, strength is aimed at by forming a circuit board and a terminal integrally and molding the whole circuit board with resin.
JP 2000-164098 A

In the above structure, the entire circuit board is molded with resin. However, molding the circuit board also requires a dedicated process, which increases the cost and hinders downsizing of electronic components. There was a request to abolish.
The present invention has been completed based on the above circumstances, and provides a plug-in type electronic unit capable of protecting a joint from a repulsive force during assembly without molding a circuit board. The purpose is to do.

  As means for achieving the above object, the invention of claim 1 is an electronic unit in which a conductive bus bar protrudes from one side surface of a housing for housing a circuit board, and the bus bar is connected to an electronic device on the other side. The bus bar is held at a position that is the front side in the insertion direction from the main body portion of the circuit board in the housing body, which is designed to be electrically connected to the other side by being inserted into a component. It is characterized in that a holding member is provided.

As an embodiment of the invention of claim 1, the following configuration is preferable.
-A holding member is fixed with respect to a container in the state in which the movement to the back was regulated at least. Thereby, the repulsive force added to a bus-bar terminal in the case of an assembly | attachment can be received reliably, and it can escape to a container.

  The invention of claim 2 is characterized in that the holding of the bus bar is performed by concave and convex fitting by a holding concave portion provided in one of the holding member or the bus bar and a holding convex portion provided in the other.

As an embodiment of the invention of claim 2, the following configuration is preferable.
-The fitting direction of the holding convex part with respect to the holding concave part is set so as to be orthogonal to the plate surface of the bus bar.

  The invention of claim 3 is the one described in claim 2, wherein a plurality of the bus bars are projected from the side surface of the container, and the holding recesses are provided in each bus bar. The holding member is made of a plate-like lock plate extending in the direction in which the bus bars are arranged, and the holding convex portions are provided on the plate surfaces of the lock plates at positions facing the holding concave portions of the bus bars. It is characterized by

As an embodiment of the invention of claim 3, the following configuration is preferable.
-When fitting, make sure that each bus bar is bridged by the holding projection. Thereby, since a connection relation arises between bus bars spaced apart from each other, a strong holding structure can be realized.

  The invention of claim 4 is characterized in that, in the invention of claim 3, a sub plate is provided together with the lock plate to hold the bus bar between opposing surfaces.

  According to a fifth aspect of the present invention, in the invention according to the second to fourth aspects, on both side edges in the width direction of the bus bar, a part of the side edge is notched and the holding recesses are opposed to each other. The bus bar is held in a double-supported state by fitting the holding convex portion there.

  According to a sixth aspect of the present invention, in the first aspect of the present invention, the container is composed of a main body whose one surface opens as a substrate accommodating port, and a lid member that closes the substrate accommodating port. It is characterized in that the holding projection is formed integrally and also serves as the holding member.

  According to a seventh aspect of the present invention, in the apparatus according to any one of the second to sixth aspects, the holding convex portion is fitted into the holding concave portion, and the tip of the holding convex portion is crushed from that state to expand the diameter. Thus, the holding member is fixed to the bus bar.

  According to an eighth aspect of the present invention, in the first aspect of the present invention, the container is composed of a main body whose one surface opens as a substrate accommodating port, and a lid member that closes the substrate accommodating port. Is characterized in that a holding piece capable of receiving the bus bar is provided between the opposing surfaces, and the bus bar is held by press-fitting between the holding pieces.

<Invention of Claim 1>
According to the first aspect of the present invention, the holding member is installed on the front side of the main body of the circuit board, and the repulsive force applied to the bus bar when the bus bar is inserted into the electronic component on the other side is transmitted to the main body of the circuit board. I received it at the previous stage and let it escape to the container side. With such a configuration, it is possible to avoid applying an excessive force to the main body of the circuit board.
In addition, according to the configuration of the present invention, as long as the space for disposing the holding member on the front side of the main body of the circuit board is secured, no other space is required, and the entire circuit board can be seen as is conventionally seen. Since it is not necessary to reinforce by molding or the like, the configuration is suitable for downsizing the unit.

<Invention of Claim 2>
According to the invention of claim 2, the bus bar is held by using the concave-convex fitting. If it is uneven fitting, it can be easily realized without a significant change in the shape of the conventional part, and the assembly of the bus bar and the holding member can also be facilitated.

<Invention of Claim 3>
According to the invention of claim 3, since a plurality of bus bars can be collectively held by a single lock plate, the assembly can be simplified as compared with the case where each bus bar is provided with a dedicated holding member and held individually.

<Invention of Claim 4>
According to invention of Claim 4, a subplate was provided and the bus bar was inserted | pinched with the lock plate. With such a configuration, the movement can be restricted also in the direction orthogonal to the plate surface (the plate surface of the bus bar), so that the reliability of the holding structure is increased.

<Invention of Claim 5>
In order to fit the concave and convex portions, it is necessary to provide at least a support for the holding convex portion on the bus bar side. According to the invention of claim 5, this receiving portion (that is, the holding concave portion) is cut out at the side edge of the bus bar. Formed. Thus, if the edge is notched, it is possible to suppress a reduction in the strength of the bus bar as compared with the case where the receptacle is configured by a through hole. In addition, since the holding concave portion is provided opposite to both edges of the bus bar and is held in the both-end supported state by the holding convex portion, the holding of the bus bar is stable.

<Invention of Claim 6>
According to the invention of claim 6, the holding member is also used as the lid member. With such a configuration, the number of parts can be reduced, which contributes to cost reduction.

<Invention of Claim 7>
In the structure in which the holding convex portion is fitted to the holding concave portion, it is necessary to provide a gap necessary for fitting between the two, and this becomes play after fitting. In this regard, according to the seventh aspect of the present invention, the tip of the holding convex portion is crushed to expand the diameter to fill the play, so that the bus bar hardly moves when receiving a repulsive force.

<Invention of Claim 8>
According to the invention of claim 8, the bus bar is held by press-fitting between the holding pieces. With such a configuration, the bus bar can be held by using the lid member assembling operation by matching the press-fitting direction and the operation direction for attaching the lid member to the substrate accommodation opening in advance.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS.
In the present embodiment, the electronic unit according to the present invention is applied to a switch unit 10 that is detachably connected to an electrical junction box (corresponding to the counterpart electronic component of the present invention) W installed in an automobile. .

  FIG. 1 is an exploded perspective view of the switch unit 10. The switch unit 10 includes a circuit board P, a casing 60 as a container, a lid member 70, and the like. In the following description, the side where the lid member 70 is provided will be described as the front side, and the opposite side as the back side.

  The circuit board P is composed of two boards, that is, a bus bar board 31 made of a metal flat plate and an insulating board 21 arranged on the upper surface thereof.

  The bus bar substrate 31 and the insulating substrate 21 both have a rectangular shape that is long in the left and right directions in FIG. 1, but the bus bar substrate 31 is slightly larger than the insulating substrate 21. The insulating substrate 21 is arranged on the upper surface of the bus bar substrate 31 with the rear ends of the substrates aligned. As a result, the front portion of the bus bar substrate 31 protrudes in front of the insulating substrate 21 by a predetermined width, and the substrate body portion 20 (corresponding to the body portion of the circuit board of the present invention) 20 formed by overlapping both the substrates 21 and 31 is formed. An exposed portion 32 is formed on the front side (see FIG. 1).

  FIG. 2 shows a cross-sectional view of the substrate body 20. As shown in the figure, a through hole 23 is formed in the insulating substrate 21, and a metal electrically connected to the conductive path 22 constituting the circuit pattern is formed around the inner wall and the opening of the through hole 23. Plating 24 is applied. When the solder H is filled up to the bottom of the through hole 23, the bus bar substrate 31 exposed to the bottom and the metal plating 24 are electrically connected via the solder H. The bus bar substrate 31 and the conductive furnace 22 of the insulating substrate 21 are electrically connected. Note that reference numeral 39 in FIG. 2 denotes an insulating adhesive layer for fixing both the substrates 21 and 31 in close contact.

  Further, as shown in FIG. 1, two switching elements 25A and 25B are mounted side by side at a slightly deeper position on the upper surface of the substrate body 20. Some terminals 26 of the switching elements 25 </ b> A and 25 </ b> B are soldered onto the conductive path 22 on the upper surface of the insulating substrate 21, and the remaining terminals 27 are soldered to the bus bar substrate 31. The switching elements 25A and 25B have a function of intermittently turning on and generating a PWM signal.

  Next, the exposed portion 32 of the circuit board P is formed with a holding hole 43 to be described later, and six bus bar terminals 33 to 38 protruding forward, which are provided in the longitudinal direction of the board. Yes.

The shape of the bus bar terminals 33 to 38 will be described in detail with reference to FIG.
Among the bus bar terminals, the third terminal 33 from the top is formed integrally with the main body portion of the bus bar substrate 31, while the other bus bar terminals 34 to 38 are separated from the main body portion and adjacent to each other. The bus bar terminals are also arranged with a gap d so as not to contact each other. The bus bar terminals 34 to 38 in the separated state are kept in position by being bonded to the insulating substrate 21 via the adhesive layer 39 described above.

  For the bus bar terminals 33 to 38, the other bus bar terminals 34 to 38 except for the bus bar terminal 33 are on the front side of the front edge 32A of the bus bar substrate 31 in order to make the entire terminal width (A dimension portion shown in FIG. The portions 34B to 38B protruding to the side are formed narrower than the portions 34A to 38A arranged on the inner side. The bus bar terminal 33 is formed with the same width over the entire range from the base end to the tip end, and the width dimension itself is wider than the width dimension of the other terminals. This is because the terminal 33 is a power system terminal.

  Now, as shown in FIG. 3, holding portions 41 and 42 are provided in the exposed portion 32. The holding recesses 41 and 42 are formed by cutting out part of the side edges of the bus bar terminals 33 to 38 in a U-shape. The holding recesses 41 and 42 have the same shape on each side edge (upper and lower side edges in FIG. 3) of the bus bar terminals 33 to 38, and the installation positions are also between the bus bar terminals 33 to 38. It is unified at the same position. In addition, it is set so that each holding recessed part 41, 42 of bus-bar terminals 33-38 is located in a line in the up-down direction shown in the figure, as shown in FIG. It means that it has been.

  By arranging the holding recesses 41 and 42 in a row in this way, the holding recesses 41 and 42 of the bus bar terminals 33 to 38 arranged adjacent to each other are paired toward each other to form one holding hole 43. And the holding convex part 53 provided in the lock plate 51 mentioned below is each fitted by each holding hole 43. As shown in FIG. The holding recess 41 outside the bus bar terminal 35 located at the end and the holding recess 42 outside the bus bar terminal 38 are paired with the holding recess 44 formed in the exposed portion 32 to form the holding hole 43. It has become.

  Next, the lock plate 51 will be described. The lock plate 51 is made of synthetic resin and has a flat plate shape extending in the direction in which the bus bar terminals 33 to 38 are arranged as shown in FIG. On the upper surface of the lock plate 51, holding convex portions 53 are provided at positions opposed to the respective holding holes 43. The holding protrusions 53 have a prismatic shape that can be fitted into the corresponding holding holes 43 without a gap, and the protruding height is set higher than the thickness of the bus bar substrate 31.

  From the above, when the lock plate 51 is assembled so as to be in close contact with the lower surface of the bus bar substrate 31 in the manner shown in FIG. (See FIG. 4). Thereby, each bus-bar terminal 33-38 will be in the state by which both edges were supported by the holding convex part 53 at both ends. In addition, as shown also in FIG. 1, in this embodiment, the fitting direction of the holding convex part 53 with respect to the bus-bar terminals 33-38 is orthogonal to the plate surface of the bus-bar terminals 33-38.

  The casing 60 is made of synthetic resin and has a box shape in which the front surface in FIG. 1 is opened as the substrate housing port 60A. Guide grooves 61 </ b> A and 62 </ b> A are provided facing the lower portions of the left and right inner walls 61 and 62 of the casing 60, and a plate accommodating portion 64 is recessed in the center of the front end of the bottom wall 63. The plate accommodating portion 64 is for receiving and accommodating the lock plate 51 described above from the front.

  Both the guide grooves 61A, 62A extend straight and horizontally along the depth direction of the casing 60, and the front ends thereof open to the substrate accommodation opening 60A. Therefore, when the left and right side edges of the circuit board P are fitted into the guide grooves 61A and 62A, respectively, and pushed into the casing, the circuit board P including the lock plate 51 is placed in a horizontal posture by the guide action of the guide grooves 61A and 62A. It can be accommodated in the casing 60 while maintaining the above.

  The depth dimension of the casing 60 is set in advance according to the depth dimension of the circuit board P, and as shown in FIG. 5, the entire board body 20 including the exposed part 32 is just inside the casing 60 when housed. Only the bus bar terminals 33 to 38 protrude forward from the board housing port 60A. The lock plate 51 of the exposed portion 32 is entirely accommodated in the plate accommodating portion 64 in the process of accommodating the circuit board P in the casing 60. The lock plate 51 is restricted from moving in the front-rear direction and the height direction when the substrate housing port 60A is closed by the lid member 70 described below.

  The lid member 70 is made of a synthetic resin material like the casing 60. As shown in FIG. 1, the lid member 70 has a flat plate shape capable of closing the substrate accommodation opening 60 </ b> A of the casing 60, and the bus bar insertion holes 73 to 78 are formed at positions facing the bus bar terminals 33 to 38. It is formed through the surface.

  Further, an engagement receiving portion 81 having an engagement hole 82 is formed on the periphery of the lid member 70. More specifically, there are six latch receiving portions 81, one pair on each of the left and right side edges and two on each of the upper and lower side edges (only four of them are shown in FIG. 1). Provided). On the other hand, a locking projection 68 is provided at a position near the front end of the outer peripheral wall of the casing 60 and at a position facing each locking receiving portion 81. The locking projection 68 has a shape in which the front side is cut off in an inclined manner, and the end surface on the back side is a vertical locking surface.

  From the above, when the lid member 70 is assembled to face the casing 60 and assembled, the bus bar terminals 33 to 38 are inserted into the bus bar insertion holes 73 to 78 and protrude forward. Then, as shown in FIG. 6, each latch receiving portion 81 of the lid member 70 is resiliently latched to each latching protrusion 68 of the casing 60, and the entire substrate housing port 60 </ b> A is closed by the lid member 70. It will be.

  Now, FIG. 7 shows a cross-sectional view of the switch unit 10 in a completed state (assembled state) as a part. As shown in the figure, when the lid member 70 is attached and the substrate accommodation opening 60A is closed, the lock plate 51 is sandwiched between the back surface 71 of the lid member 70 and the back wall of the plate accommodation portion 64. The position of the lock plate 51 is restricted in the front-rear direction (left-right direction in FIG. 7).

  Further, a reinforcing wall 79 is provided on the back surface 71 of the lid member 70 at a position slightly above the upper portion so as to protrude inward of the casing 60. The reinforcing wall 79 is used to increase the rigidity of the lid member 70, but also has a function of sandwiching the lock plate 51 between the bottom wall of the plate housing portion 64 and restricting the vertical movement of the lock plate 51. .

Next, the function and effect of the present invention will be described.
As shown in FIG. 7, the above-described switch unit 10 pushes the bus bar terminals 33 to 38 into the connection box from the receiving port Wa provided on one side surface of the electric connection box W, and is provided in the electronic connection box W. In this case, the bus bar terminals 33 to 38 receive a repulsive force corresponding to the pushing force.

  In this case, if the entire circuit board P is pushed backward (in the direction of arrow C in FIG. 7), the rear end of the circuit board P eventually comes into contact with the rear wall 60 </ b> B of the casing 60. From this state, when pushed further inward, an excessive force is applied to the board body 20 constituting the circuit board P.

  As already described, the circuit board P is composed of a plurality of components such as the insulating substrate 21, the bus bar substrate 31, and the switching elements 25 </ b> A and 25 </ b> B. These components are mechanically and electrically connected to each other in the substrate body 20. Joined / connected. For example, the bus bar substrate 31 and the insulating substrate 21 are joined by the adhesive layer 39, and the terminals of the switching elements 25 </ b> A and 25 </ b> B are connected to the conductive path 22 of the insulating substrate 21 by the solder H. In addition, the conductive path 22 of the insulating substrate 21 and the bus bar substrate 31 are electrically connected by the through hole 23, and the bus bar substrate 31 and the switching elements 25A and 25B are also electrically connected (not shown). Has been. For this reason, when an excessive force is applied to the substrate body 20 to cause a curved deformation or the like, an excessive force is also applied to the joining / connecting portion between the components due to the deformation.

In this regard, in the present embodiment, as shown in FIG. 7, a lock plate 51 is provided in front of the substrate body 20 (more specifically, on the front side in the insertion direction of the bus bar with respect to the electrical junction box W). Each bus bar terminal 33-38 was held. Thereby, the repulsive force at the time of the assembly | attachment added to each bus-bar terminal 33-38 can be escaped to the casing 60 side in the step before transmitting to the board | substrate main-body part 20. FIG. Thereby, it is possible to effectively protect the board main body portion 20, and consequently the joint / connection portion between the components, from the repulsive force of the assembly portion.
Further, in the configuration of the present embodiment, as long as the space for disposing the holding member (here, the lock plate 51) is secured on the front side of the substrate main body portion 20, the substrate main body portion 20 of the substrate main body portion 20 can be seen. Since it is not necessary to reinforce the whole by molding or the like, the configuration is suitable for downsizing the unit.

  Moreover, the thing of this embodiment uses uneven | corrugated fitting as a holding structure of the bus-bar terminals 33-38. If it is uneven fitting, it can be easily realized without a significant shape change compared to the conventional part shape, and can be easily assembled.

  In addition, in this embodiment, as shown in FIG. 7, the holding convex portion 53 is fitted to the bus bar substrate 31 so as to penetrate the plate surface vertically. As described above, at the time of assembly, the bus bar terminals 33 to 38 receive a repulsive force and are pushed toward the back of the casing. However, with the above configuration, the fitting direction is orthogonal to the fitting direction. Therefore, it is possible to effectively receive the force applied to the bus bar terminals 33 to 38, which is optimal as a holding structure.

  Further, the holding hole 43 which is the counterpart side of the holding convex portion 53 is formed by cutting out the side edge portions of the bus bar terminals 33 to 38. Thus, if it cuts out a part of terminal side edge, compared with the case where a through-hole is formed in the center of a terminal, for example, it becomes possible to suppress the strength reduction of the bus-bar terminals 33-38.

  Further, in the present embodiment, holding recesses 41 and 42 are provided on both edges of the bus bar terminals 33 to 38 as shown in FIG. 38 was supported on both sides. With such a configuration, it is possible to receive a rotational force as indicated by an arrow B in FIG.

  Moreover, in this embodiment, the holding hole 43 is formed ranging over the adjacent bus bar terminals 33 to 38, and when the holding projection 53 is fitted therein, the adjacent bus bar terminals 33 to 38 are held holding projections. It will be in the state bridged by 53. Specifically, in FIG. 4, the hatched holding convex portion 53 serves to hold the bus bar terminal 33 and the bus bar terminal 36, and bridges both bus bar terminals 33 and 36. With such a configuration, the entire bus bar terminal is bridged via the holding projections 53, and a connection relationship occurs between them, so that a strong holding structure can be realized.

  In addition, in the present embodiment, a plurality of holding convex portions 53 are provided on one lock plate 51 so that the bus bar terminals 33 to 38 are held together. With such a configuration, the assembly can be simplified as compared with the case where a dedicated holding member is provided for each of the bus bar terminals 33 to 38.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS.
In the second embodiment, a sub plate 90 is newly added to the configuration of the first embodiment.

  As shown in FIG. 8, the sub plate 90 has a flat plate shape along the arrangement direction of the bus bar terminals 33 to 38, similarly to the lock plate 51. Relief holes 91 are formed in the opposing positions of the holding projections 53 of the lock plate 51 on the sub plate 90. The sub plate 90 is paired with the lock plate 51 and is assembled so as to overlap the upper surfaces of the bus bar terminals 33 to 38 as shown in FIG. 8 and sandwich the bus bar terminals 33 to 38 together with the lock plate 51.

  Further, the horizontal width of the sub-plate 90 is longer than that of the lock plate 51 and is set to be approximately the same as the horizontal width of the bus bar substrate 31. On the other hand, as shown in FIG. 9, the guide grooves 61B and 62B provided in the casing 60 are stepped, and the entrance side is wide.

  When the plates 51 and 90 are housed in the casing 60 together with the circuit board P, the sub-plate 90 is fitted to the entrance portions of the guide grooves 61B and 62B without any gaps and fixed to the casing 60 as shown in FIG. It is like that.

  As a result, the sub-plate 90 is positioned to face the upper surfaces of the bus bar terminals 33 to 38 and prevents the bus bar terminals 33 to 38 from floating, so that the bus bar terminals 33 to 38 are more firmly held.

  In the embodiment, the height is set such that the end surface 53A of the holding projection 53 protrudes from the upper surface of the sub-plate 90 when assembled. Since the other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals and description thereof is omitted.

<Embodiment 3>
Next, Embodiment 3 of the present invention will be described with reference to FIGS.
In the first embodiment, the lock plate 51 is exclusively provided as a member for holding the bus bar terminals 33 to 38. However, in the third embodiment, the lock plate 51 is abolished and the holding convex portion 53 is provided on the lid member 70. It is provided integrally to reduce the number of parts.

  FIG. 11 is a perspective view of the lid member 70 as viewed from below. A reinforcing wall 79 is provided at the center of the back surface of the lid member 70 as in the case of the first embodiment. The reinforcing wall 79 forms a horizontally long ring extending in the width direction of the lid member 70, and in the third embodiment, the lower edge is extended in the arrangement direction of the bus bar terminals 33 to 38 to form the installation portion 101. .

  At each position facing the holding holes 43 on the lower surface wall of the installation portion 101, holding convex portions 103 are formed so as to protrude downward in the figure. When the lid member 70 is assembled to the exposed portion 32 at the front end of the circuit board, each holding convex portion 103 is fitted into the holding hole 43 as shown in FIG.

  Even with such a configuration, each of the bus bar terminals 33 to 38 can be held, and as in the case of the first embodiment, the repulsive force applied to the bus bar terminals 33 to 38 is released to the casing 60 side. I can do it. FIG. 13 shows a sectional view in the assembled state.

<Embodiment 4>
Next, a fourth embodiment of the present invention will be described with reference to FIG.
The component structure of the fourth embodiment is the same as that of the third embodiment. After the cover member 70 is assembled to the circuit board P and the holding projections 103 are fitted into the holding holes 43, the holding projections 103 are formed. The difference is that it is heated and pressurized to be caulked. As shown in FIG. 14, the holding convex portion 103 is crushed and expanded in diameter by caulking, and as a result, the gap between the holding hole 43 is filled. Therefore, after the crimping, the bus bar terminals 33 to 38 are fixed to the lid member 70 without rattling, so that the bus bar terminals 33 to 38 can be firmly held.

<Embodiment 5>
Next, a fifth embodiment of the present invention will be described with reference to FIGS.
In any of the first to fourth embodiments, the bus bar terminals 33 to 38 are held by fitting the holding convex portion 53 into the holding hole 43 so that the bus bar terminals 33 to 38 are held, but in this embodiment, the holding structure is used. By changing itself, the assembly workability is improved.

  FIG. 15 is a perspective view of the lid member 70 as viewed from below. A reinforcing wall 79 is provided at the center of the back surface of the lid member 70 as in the case of the first embodiment. The reinforcing wall 79 forms a horizontally long ring extending in the width direction of the lid member 70, and in the fifth embodiment, the lower edge is extended in the arrangement direction of the bus bar terminals 33 to 38 to form the installation portion 101. .

  A holding piece 110 is provided on the lower wall of the installation portion 101 so as to protrude downward in the figure. A plurality of holding pieces 110 are provided with a predetermined width. Each holding piece 110 faces the longitudinal direction of the bus bar terminals 33 to 38, and can receive the bus bar terminals 33 to 38 between the holding pieces 110 arranged adjacent to each other.

  Each holding piece 110 has ribs 115 projecting from both sides of the plate surface. These ribs 115 have a protruding height from the plate surface so that the distance between the opposing ribs 115 is narrower than the width dimension of the bus bar terminals 33 to 38.

  When the lid member 70 is assembled to the casing 60 with the above-described configuration, the bus bar terminals 33 to 38 are naturally held between the holding pieces 110 and held. Specifically, in FIG. 16, the casing 60 is omitted, but when the lid member 70 is moved closer to the casing 60, the bus bar terminals 33 to 38 are respectively between the corresponding holding pieces 110. I will enter.

  Then, when the bus bar terminals 33 to 38 are inserted between the holding pieces 110, the leading ends of the ribs 115 abut on the side edges of the bus bar terminals 33 to 38. After that, the bus bar terminals 33 to 38 are pushed between the holding pieces 110 facing each other in a contact state (so-called press-fitting). Therefore, in the state where the assembly is completed, as shown in FIG. It will be clamped by the holding piece 110.

  As described above, in the fifth embodiment, if the lid member 70 is assembled to the casing 60, the holding of the bus bar terminals 33 to 38 is completed at the same time, so that the number of assembling steps can be reduced and the cost can be reduced. To do.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.

  (1) In the first embodiment, while the holding convex portion 53 is provided on the lock plate 51, the holding concave portions 41 and 42 are provided on the bus bar terminals 33 to 38, the holding concave portion 41, It is good also as a structure which provides 42 and the holding convex part 53 in the bus-bar terminals 33-38.

  (2) In the first embodiment, the lock plate 51 is mounted on the back surface side of the exposed portion 32. However, the holding hole 43 and the holding convex portion 53 are unevenly fitted at the front position of the substrate body portion 20. As shown in FIG. 18, the lock plate 51 may be mounted on the upper surface side of the exposed portion 32 in the assembling direction.

  (3) In the first embodiment, the second embodiment, and the third embodiment, none of the holding convex portions 53 is caulked, but as in the fourth embodiment, caulking may be performed.

  (4) In the first embodiment, the electrical junction box is exemplified as the counterpart electronic component. However, the electrical junction box is applicable as long as electrical connection is achieved by inserting a bus bar into the counterpart side. The electronic component may be a connector or the like.

The exploded perspective view of the switch unit in Embodiment 1. Cross section of board body Enlarged view of exposed area The figure which shows the state which the holding convex part was made to fit in a holding hole The figure which shows the state which accommodated the circuit board in the casing Perspective view of switch unit Cross section of switch unit The exploded perspective view of the switch unit in Embodiment 2. Cross section of switch unit The figure which shows the state which pinched the bus bar terminal up and down with the lock plate and the sub plate The perspective view which shows a mode that the holding convex part was integrally formed in the cover member in Embodiment 3. FIG. The figure which shows the state by which the holding | maintenance convex part of the cover member was unevenly fitted by the holding hole of the bus-bar terminal Cross section of switch unit Sectional drawing of the switch unit in Embodiment 4. In Embodiment 5, the perspective view which shows a mode that the holding piece was integrally formed by the cover member. The figure (perspective view) which shows the state where the bus-bar terminal was press-fitted between the holding pieces of the lid member Enlarged view of the press-fitted part Figure with the lock plate mounted on the top side of the exposed part

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Switch unit 20 ... Board | substrate main-body part 21 ... Insulating board 31 ... Bus-bar board 33-38 ... Bus-bar terminal 43 ... Holding hole 51 ... Lock plate 53 ... Holding convex part

Claims (8)

An electronic unit formed by projecting a conductive bus bar from one side surface of a housing that houses a circuit board,
In what is intended to achieve electrical connection with the counterpart by inserting the bus bar into the electronic component of the counterpart,
An electronic unit, wherein the holding body is a holding member that holds the bus bar at a position in front of the main body of the circuit board in the insertion direction. 2. The electronic unit according to claim 1, wherein the holding of the bus bar is performed by concave and convex fitting by a holding concave portion provided on one of the holding member or the bus bar and a holding convex portion provided on the other. . In the case where a plurality of the bus bars are juxtaposed from the side surface of the container, and the holding recesses are provided in each bus bar,
The holding member is made of a plate-like lock plate extending in the direction in which the bus bars are arranged, and the holding convex portions are provided on the plate surfaces of the lock plates at positions facing the holding concave portions of the bus bars. The electronic unit according to claim 2, wherein the electronic unit is provided. 4. The electronic unit according to claim 3, further comprising a sub plate that holds the bus bar between the opposing surfaces together with the lock plate. 5. On both side edges in the width direction of the bus bar, a part of the side edge is cut out to form the holding concave part, and the bus bar is held in both ends by fitting the holding convex part there. The electronic unit according to claim 2, wherein the electronic unit is held. The container is composed of a main body whose one surface is opened as a substrate container opening, and a lid member that closes the substrate container opening, and the holding convex portion is integrally formed on the lid member so that the holding member is also used. The electronic unit according to claim 2, wherein the electronic unit is provided. 3. The holding member is fixed to the bus bar by fitting the holding convex portion into the holding concave portion and crushing the tip of the holding convex portion to expand the diameter from the state. The electronic unit according to claim 6. The container is composed of a main body having one surface opened as a substrate container opening, and a lid member for closing the substrate container opening,
The lid member is provided with a holding piece capable of receiving a bus bar between opposing surfaces, and is configured to hold the bus bar by press-fitting between the holding pieces. Electronic unit.

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