JP2010171195A - Case with circuit board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a case with a circuit board that prevents an incorrect insertion of a circuit board, and also immediately finds out the incorrect insertion when inserting a circuit board into the case by fitting both side edges of the circuit board in opposite guide grooves formed in a case body. <P>SOLUTION: On one surface 14 of a circuit board 11, protrusions 10 projecting from the board surface 14 are formed at sites closer to the side edges 15 on both sides near the leading end 13 of insertion. Meanwhile, in a case body 21, stoppers 35 causing the protrusions 10 to abut against are formed near an entrance 29 of each guide groove 27, so that, when the board 11 is positioned correctly, with both sides positioned correctly, the board can be inserted into the case body 21 with the side edges 15 on both sides of the board 11 fitted with the guide grooves 27, but when the board 11 is positioned upside down, the insertion of the board 11 is stopped. When the circuit board 11 is positioned upside down, it is immediately found out and thereby an incorrect insertion can be prevented. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a case with a circuit board (circuit board housing case) in which a circuit board (wiring board) on which electronic components are mounted (mounted) is housed in a case body.

  For example, a circuit board (hereinafter, also simply referred to as a board) on which a large number of electronic components that are components of various electronic control units mounted on an automobile are mounted is usually made of resin (hard resin) for protection. The case body is housed in a case body and is installed at a suitable location in the vehicle as a case with a circuit board. As such a case with a circuit board (hereinafter, also simply referred to as a case), for example, side guides on both sides of the board are provided with board guide grooves (hereinafter referred to as guide grooves or hereafter) provided in parallel with opposing inner surfaces in the case body. A structure having a structure that is simply inserted into a case body and is inserted into a case body is known. Thus, when a circuit board (hereinafter also simply referred to as a board) is inserted and assembled as a case with a circuit board, the assembly work is made more efficient and, of course, no assembly failure (miss) is caused. There is a need. Here, as a typical example of the assembly failure, there is an erroneous insertion (hereinafter, also simply referred to as “erroneous insertion”) in which the substrate is inserted with the front and back surfaces (upper surface and lower surface) reversed (opposite). As a technique for preventing such erroneous insertion, various proposals have been made (for example, Patent Document 1).

  In Patent Document 1, as a means for preventing erroneous insertion of a substrate, the guide groove itself is asymmetrical in the vertical direction of the case body (in the thickness direction of the substrate) in the thickness direction of the substrate, that is, in the case body. It has been proposed to provide a bias in one of the vertical directions. In the erroneous insertion state, the electronic component mounted on the board surface is configured to be an obstacle, thereby preventing erroneous insertion. However, with such a board arrangement, the degree of freedom in designing the board arrangement in the case body is lost. The problem is particularly great when a plurality of substrates are arranged in parallel and accommodated. In Patent Document 1, various proposals that solve such problems are also proposed.

  One of the proposals is as follows. In the case body, the opposite inner surface (formation surface of the guide groove) intersects the guide groove, and the front and rear (front and rear) of the case body in the board insertion direction are different (with a left-right asymmetrical arrangement) ), An elastic protrusion is provided. On the other hand, when the substrate is inserted in the normal state, that is, when the substrate is inserted in the correct front and back as designed (hereinafter referred to as the normal state) with respect to the left and right side edges of the substrate, the elastic protrusions are A recess to be engaged is provided.

  In other words, with such a configuration, when the board is inserted in a regular state, the board is correctly inserted along the left and right guide grooves to the back of the case body (to the regular position). . The left and right elastic protrusions engage with the recesses provided at the left and right side edges of the substrate, respectively, with different front and rear. On the other hand, when the board is inserted with its front and back sides being non-regular (reverse), the inlet of one guide groove is inserted into one of the recesses located on the relatively tip side of one side of the board. An elastic protrusion located closer (an elastic protrusion located relatively rearward) is fitted and engaged. As a result, the substrate is inserted in a halfway state, and further insertion is stopped, so that the operator notices that the substrate is erroneously inserted upside down. Even if the user does not notice the erroneous insertion, the substrate is sent to the next process without being inserted to the proper position, so that it is detected as an erroneous insertion by an appearance check in the subsequent process.

Japanese Patent No. 2980591

  Among the prior arts described above, the technology for preventing erroneous insertion by fitting the elastic protrusion provided so as to intersect the guide groove into the concave portion at the side edge of the substrate should be solved as follows. There are serious challenges. The first problem is as follows. If the board is inserted in the wrong direction with both ends fitted into the guide groove, the elastic protrusion on the side of the case body engages with the recess provided on the side edge, and it is determined that the board is erroneously inserted. After inserting a considerable amount of the substrate from the tip. That is, it is determined that the insertion is erroneous after the insertion process has progressed considerably. Moreover, in that case, the substrate is once pulled out and then inserted again. Therefore, in such a conventional technique, when a substrate is erroneously inserted, a wasteful process is required in which a considerable amount of insertion is required. As a result, there is a problem that the assembly efficiency of the case is poor, and this problem is extremely large for unskilled workers.

  The second problem is as follows. In the prior art, since it is necessary to provide a recess at the side edge of the substrate, a step of cutting (notching) a portion of the substrate corresponding to the recess by a predetermined process is required. However, such a cutting process causes a significant reduction in the production efficiency of the circuit board. In addition, the structure of the substrate itself is complicated. In addition, such processing on the substrate is not preferable because it leads to a reduction in the routing area of the internal wiring of the substrate.

  The third problem is that the provision of the elastic protrusion on the case body itself has a difficulty. This is because providing such an elastic protrusion in the main body increases the number of parts of the case itself or complicates the structure. Therefore, the cost as a case complete product is also increased.

  The present invention is not only able to prevent erroneous insertion when the side edges on both sides of the circuit board are inserted into the opposing guide grooves in the case body, but the erroneous insertion is quickly found. In addition, there is provided a case with a circuit board provided with a means for preventing erroneous insertion, which does not require the provision of a recess that reduces the wiring area of the internal wiring of the board or the elastic protrusion on the case body. Objective.

In order to achieve the above object, according to the first aspect of the present invention, the circuit board is formed by fitting the side edges on both sides of the circuit board on which the electronic component is mounted to the board guide grooves on the inner surface of the case body facing each other. In the case with a circuit board that is assembled by inserting the inside of the case body,
The circuit board is provided with a convex portion that protrudes from the surface of the substrate at least at one of the substrate surfaces and at least one side end portion of the tip at the time of insertion or a portion near the tip.
In the case body, when the front and back of the circuit board are in a regular state, the side edges on both sides of the circuit board can be fitted into the board guide groove and inserted into the case body. When the front and back sides of the circuit board are in an irregular state, a stopper that the convex part hits is formed in the vicinity of the entrance of the board guide groove so that the insertion of the circuit board into the case body is stopped. Features.

  In the present invention, “one substrate surface” refers to one of the front and back surfaces of a circuit board. However, in the present application, the front and back of the circuit board is simply used to distinguish both sides of the board. In addition, the “part near the front end” of the circuit board refers to an end of the board where insertion is started, that is, a part near the front end and spaced apart by a predetermined amount (predetermined dimension) from the front end to the rear end. . The “side end portion” refers to a portion in the vicinity of the side end of the same substrate that fits into the substrate guide groove and spaced from the side end toward the other side end by a predetermined amount. Hereinafter, the substrate guide groove is also referred to as a guide groove or simply a groove.

According to a second aspect of the present invention, in the case with the circuit board according to the first aspect, at least one of the substrate surfaces protrudes from the substrate surface to a tip end or a portion near the tip end at the time of insertion. Instead of being provided with convex parts
With a circuit board, characterized in that a convex portion that protrudes from the surface of the substrate is provided on one of the substrate surfaces and on each side end portion on both sides of the distal end or the distal end portion at the time of insertion. It is a case.

According to a third aspect of the present invention, in the case with the circuit board according to the first aspect, the surface of at least one of the substrates is located on at least one side end portion of the front end or the front end portion at the time of insertion. Instead of being provided with protruding protrusions,
A case with a circuit board, characterized in that a convex portion that protrudes from the substrate surface is provided on one substrate surface and at one side end portion of the tip at the time of insertion or a portion near the tip. It is.

  The invention according to claim 4 is characterized in that the convex portion is provided between the mounting area of the electronic component and the tip at the time of insertion in the substrate surface. It is a case with a circuit board given in any 1 paragraph.

  In the case with a circuit board according to the first to third aspects of the present invention, based on the configuration, when assembling the case, the circuit board is inserted in an irregular state or is about to be inserted, that is, In the erroneous insertion state, the convex portion provided at the tip or near the tip of the substrate hits a stopper formed in the vicinity of the entrance of the substrate guide groove, and the erroneous insertion is stopped. In other words, in the present invention, the erroneous insertion is immediately found at the time of starting the insertion of the substrate or after the start of the insertion, so that the normal state can be immediately obtained without performing a wasteful process such as a conventional extraction after the erroneous insertion. Can be switched and reinserted. Accordingly, a remarkable and remarkable effect that the efficiency of assembling the case can be increased correspondingly.

  Further, in the present invention, unlike the prior art described above, it is not necessary to provide a recess at the side edge of the substrate or an elastic protrusion on the case body, so that the internal wiring routing area is not reduced. On the other hand, in the present invention, it is necessary to provide (form) a convex portion on the substrate, but such a convex portion is provided by soldering a dedicated component or an appropriate chip (component), In the process of mounting (mounting) other electronic components on the surface of the circuit board by soldering, they can be processed simultaneously in the same solder reflow process. Therefore, since the formation (installation) step of this convex part is not required separately, it can also be formed, so that the cost of forming means for preventing erroneous insertion is also expected.

  Furthermore, in the invention according to claim 4, since the convex portion is provided on the front end side of the substrate surface from the mounting area of the plurality of electronic components, it is forcibly pushed in an erroneous insertion state, Even if the tip of the substrate collides with the wall, it is effective for preventing damage to the electronic component.

FIG. 3 is a cross-sectional view of the case with a circuit board that embodies the present invention, in which the inserted circuit board is cut along the front-rear direction. The AA sectional view taken on the line of FIG. 1, and its principal part enlarged view. The disassembled perspective view for description of the case with a circuit board of FIG. The figure which removed the cover with a connector in FIG. 1, and the case where the circuit board was inserted looked at the case main body from the entrance side of a groove | channel, and its principal part enlarged view. Sectional drawing explaining the state which a convex part contacts a stopper when a circuit board is inserted in a case main body in an irregular state, and the principal part enlarged view. The partial enlarged view which looked at the case main body from the entrance side of the groove | channel explaining the positional relationship of a convex part and a stopper in FIG. The perspective view explaining the process of inserting the circuit board attached to the cover with a connector in a case main body. The partially broken top view explaining the process of inserting a circuit board in a case main body. Sectional drawing explaining the process of inserting the circuit board attached to the cover with a connector in a case main body.

  The best mode for carrying out the present invention (first embodiment) will be described in detail with reference to FIGS. FIG. 1 is a longitudinal sectional view of a case with a circuit board (hereinafter also simply referred to as a case) 1 according to the present embodiment, in which an inserted circuit board (hereinafter also simply referred to as a board) 11 is cut along the front-rear direction. FIG. 2 is a cross-sectional view taken along the line AA in FIG. The case 1 includes a resin case main body (hereinafter also simply referred to as a main body) 21 and a circuit board 11 mounted (mounted) with a large number of electronic components (not shown) inserted therein. Has been. However, the circuit board 11 has a constant thickness and is formed in a substantially rectangular (rectangular) shape (see FIG. 3). One end side (left side in FIG. 1) is attached to the cover 41 with the connector, and the case body 21.

  The cover with connector (hereinafter also simply referred to as a cover) 41 is made of resin. The cover body 42, the connector 43 provided on one end side (left side in FIGS. 1 and 3), and further on the circuit board A plurality of lead wires (not shown) to be connected are integrally formed with a lead wire insertion portion 44 with an insertion hole for inserting the end portions thereof (see FIG. 8). The cover main body 42 will be further described later. On the other hand, as shown in the exploded perspective view for explanation in FIG. 3, the circuit board 11 is attached to the cover 41 with a connector on one end side (left side in FIG. 3). However, the attachment is made by penetrating the tip end portions of the plurality of L-shaped terminal fittings 45 provided so as to protrude toward the case main body side through the substrate 11 and a plurality of electrode terminals (not shown) provided on the substrate 11. )) By soldering. In this example, the upper surface (upper surface in FIGS. 1 to 4, etc., the substrate surface) 14 in the vicinity of the tip 13 of the substrate 11 (upper surface: substrate surface), the vicinity (side end) of the left and right sides, respectively. The convex part 10 is formed in the side part) (see FIG. 3). The protrusion 10 is formed when the side end 15 of the substrate 11 is inserted along a substrate guide groove (hereinafter also referred to as a guide groove or simply a groove) 27 formed on the inner surface 28 facing the inside of the case body 21. It is comprised so that an incorrect insertion prevention means may be made. Hereinafter, the case main body 21, the circuit board 11, and the like constituting the case 1 of this example will be described in more detail.

  The case main body 21 forming the case 1 of the present embodiment is made of resin, the peripheral wall 22 has a predetermined thickness (thickness), and is formed so that the substrate 11 can be accommodated from the left side of FIGS. (See FIGS. 7 to 9). In this example, the right back of FIGS. 1 and 3 is closed to form a substantially rectangular shape in plan view, and the AA cross section of FIG. 1 is formed in a flat shape as shown in FIG. The main body 21 has one end side (left side in FIG. 1) formed with a small thickness as an insertion port 23 of the circuit board 11 (see FIGS. 4 to 9). However, the inner surface 25 of the portion closer to the insertion opening 23 of the main body 21 is formed to be slightly larger than the back side (see FIGS. 8 and 9). Moreover, when this is seen from the insertion side of the board | substrate 11, the insertion port 23 of the main body 21 is exhibiting the shape close | similar to an ellipse long horizontally as shown in FIG. However, the outer surface of the central portion on the back side of the upper peripheral wall 22 in FIG. 1 of the main body 21 of this example is recessed. The inner surface (inner peripheral surface) 25 of the main body 21 forming the insertion port 23 has a ring-shaped rubber packing for sealing attached to a cover 41 attached to the main body 21 when the substrate 11 is inserted. 51 is configured to be fitted. That is, the inner surface 25 forms a seal surface that holds the seal at the attachment portion of the cover 41 when assembled as the case 1 via the rubber packing 51. The rubber packing 51 is fitted into the packing mounting portion 47 provided on the surface of the cover 41 with connector facing the case body 21 before being assembled by being pushed in the direction of arrow G in FIG. It is configured.

  Next, the substrate guide groove 27 formed in the case main body 21 of this example will be described. In this example, the guide groove 27 is laterally extended from the back end P1 of the inner surface 25 forming the sealing surface located on the insertion port 23 side of the case main body 21 toward the back of the main body 21 (right side in FIG. 1). The grooves are formed in parallel to each other along the left and right inner surfaces 28 facing inward in the direction, with the same groove depth. The substrate guide groove 27 has a groove width W slightly larger than the thickness T of the substrate 11 so that the side end 15 of the substrate 11 to be inserted can be inserted (see FIG. 2). However, the groove width W is formed so that the portion near the insertion opening 23 of the substrate 11 is formed slightly wider and serves as a guide during insertion to facilitate insertion. Each of the left and right grooves 27 is provided so as to be located slightly below the intermediate portion in the height direction of the case 1 (vertical direction in FIG. 1) as shown in FIGS. Each groove 27 is opened on the side of the insertion port 23 of the case main body 21, and an opening end of the groove 27 forms an inlet 29 of the groove 27 and a wall (back wall) 30 that makes a back end in the main body 21. It is formed in a shape extending straight toward. In this example, since the main body 21 is symmetric when viewed from the opening side that is the insertion port 23 (see FIGS. 2 and 4), one of the main bodies 21 will be described later (see FIGS. 2 and 4). One side) will be described.

  Further, when viewed from the side of the insertion port 23 for inserting the substrate 11, the case body 21 is formed to be wide on the left and right as shown in FIGS. The width between 31 is the front-rear direction of the main body 21, and the inner side (also referred to as a seal surface) 25 region near the insertion port 23 is relatively narrower on the back side than the seal surface 25 region. ing. That is, the guide groove 27 is located behind the seal surface 25 region from the insertion port 23 side of the main body 21 to the back, but at the front and rear boundary portions of the main body 21 between the guide groove 27 region and the seal surface 25 region. In each of the left and right lateral walls 31, an insertion port-facing wall 33 facing the insertion port 23 in the main body 21 is formed (see FIG. 4).

  In this embodiment, the insertion-port-facing wall 33 projects to the inner side in the width direction of the main body 21 (center C side in FIG. 2) with the substrate guide groove 27 sandwiched vertically between the left and right lateral walls 31. Thus, it faces the insertion port 23 side. However, the insertion-port-facing wall 33 has an overhang (groove side wall) size (a dimension in the depth direction of the groove) on the inner side (center side) in the width direction of the main body 21 at the upper and lower sides sandwiching the guide groove 27. 4, L2 of the lower groove side wall 27b in the lower part is made larger than L1 of the upper groove side wall 27a in the upper part in FIG. In this embodiment, of the portion of the insertion-port-facing wall 33 located below the substrate guide groove 27 in FIG. 4, the portion closer to the center C in the width direction of the main body 21 indicated by the two-dot chain line is the substrate 11. Is formed so as to form a stopper 35 against which the convex portion 10 provided on the upper surface (front surface) 14 of the substrate 11 comes into contact.

  In this example, the inner side (center side) end of the lower groove side wall 27b in the width direction of the case main body 21 is connected to form a lower horizontal wall 37 extending in a substantially right angle toward the lower side in the main body 21. Further, the inner side (center side) end in the width direction of the main body 21 of the upper groove side wall 27a is connected to the upper side wall 38 so as to extend upward in the main body 21 in a slightly inclined manner toward the center side in the same width direction. It is composed. In the case body 21 of this embodiment, the opposing inner surface 28 in which the groove 27 is formed and the cross section of the groove 27 are formed in the form shown in FIG. 2 from the inlet 29 of the groove 27 to the back end (back wall 30). Has been.

  With the above configuration, in this example, when the board 11 is inserted into the case main body 21 with the front and back of the board 11 in the normal state (as designed), the side edges 15 on both sides are fitted in the left and right grooves 27, The portion near the side edge 15 on each side of the lower surface (back surface) 17 of the substrate 11 is configured to be supported by a shelf formed by the lower groove side wall 27b. As described above, in this embodiment, the shelf forming the lower groove side wall 27b has the same width up to the back of the main body 21, but the stopper 35 is formed on the wall 33 facing the insertion opening. Just do it. Therefore, the depth L2 of the protrusion of the lower groove side wall 27b toward the center C of the main body 21 at the back of the stopper 35 may be the same as or smaller than L1 of the upper groove side wall 27a. In other words, the board guide groove 27 itself has only to be fitted with the side ends 15 on both sides of the circuit board 11 in a normal state and the board 11 can be inserted into the case body 21. , It does not have to be continuous from the entrance 29 to the back.

  Next, the circuit board 11 and the convex portion 10 formed on the circuit board 11 so as to hit the stopper 35 of the main body 21 when erroneously inserted will be described in detail. As described above, the substrate 11 is formed in a substantially square shape with a constant thickness, and is attached to the cover 41 with a connector. The convex portion 10 in the substrate 11 is located near the tip 13 in the insertion of one substrate surface (upper surface in FIG. 1 and the like) 14 and is disposed in a symmetrical manner at a position near the side end 15 on each side of the substrate 11. Thus, it is provided so as to protrude from the substrate surface 14. In addition, this convex part 10 consists of chip | tip parts which exhibit a rectangular parallelepiped shape, and may adhere | attach, However, In this example, when mounting other electronic parts which are not illustrated by soldering, it is simultaneously joined by soldering and provided. Yes.

  When the convex portion 10 is positioned on the substrate 11, the side ends 15 on both sides of the circuit board 11 are placed in opposing substrate guide grooves 27 in the main body 21, and the board guide on the insertion port 23 side of the main body 21. It is provided so as to be inserted into the main body 21 without any trouble when the board 11 is inserted into the groove 27 and pushed into the case main body 21 (see FIG. 4). As shown in FIGS. 5 and 6, when the front and back surfaces 14 and 17 of the circuit board 11 are in an irregular state, that is, when the convex portion 10 is positioned below, the side edges 15 on both sides of the board 11. Is inserted into the groove 27 from the inlet 29, and the convex portion 10 hits the stopper 35 so that the substrate 11 cannot be inserted into the main body 21. In this embodiment, as shown in FIGS. 1 and 3, etc., the convex portion 10 is provided at a position close to the tip end 13 of the substrate 11 in the portion near the side end 15 on both sides of the circuit substrate 11, but at the same time, In FIG. 3, it is provided on the tip side from a region surrounded by a two-dot chain line E (electronic component mounting region).

  As is clear from the above description, since the case 1 of this embodiment has such a configuration, the assembly includes a cover 41 with a connector to which the board 11 is attached as shown in FIG. By gripping, the normal state where the convex portion 10 becomes the upper surface 14 of the substrate 11 is obtained. In this state, as shown in FIGS. 4, 8 (upper), and FIG. 9, the side ends 15 on both sides of the tip 13 of the substrate 11 are connected to the inlets 29 of the left and right grooves 27 in the main body 21. As shown in FIG. 8 (bottom) and FIG. 9, the substrate 11 is inserted into the back of the main body 21. By doing so, the desired case 1 with circuit board in the form shown in FIG. 1 is assembled.

  On the other hand, when the front and back surfaces 14 and 17 of the circuit board 11 are in an irregular state, that is, in this example, when the convex portion 10 is positioned below, the side edges 15 on both sides of the circuit board 11 are formed in the guide grooves 27. Even if it is inserted from the entrance 29 side, it cannot be done. That is, as is apparent from the above description, in this case, as shown in FIGS. 5 and 6, the convex portion 10 provided at the side end portion of the substrate 11 closer to the tip end portion 13 is formed by the substrate guide. Since it hits the stopper 35 positioned at the edge of the inlet 29 of the groove 27, it is not erroneously inserted and its insertion is prevented.

  As described above, in this embodiment, since the front and back of the circuit board 11 are in an irregular state and an operator tries to fit the side edges 15 in the left and right grooves 27, the front and back of the board 11 are not It can be recognized that the state is normal. Therefore, the operator can immediately insert in the normal state without going through a wasteful process such as pulling out after erroneous insertion as in the prior art. In this way, even in the case of erroneous insertion in this example, since it is known at an early stage, the useless process in assembling the case is greatly improved compared to the above-described conventional technology, so that the case manufacturing efficiency Can be improved. As can be understood from this effect, the position where the convex portion 10 is provided is preferably closer to the tip 13 of the substrate 11, and therefore, it is preferably provided at the tip 13 if there is no problem in formation.

  Further, in this embodiment, since the convex portion 10 is provided on the tip 13 side from the mounting area (two-dot chain line region E in FIG. 3) of a plurality of electronic components, the substrate 11 is forcibly pushed in with the wrong insertion state. Even if the tip 13 collides with the back wall 30 of the case main body 21, the convex portion 10 hits the back wall 30 first, which is effective in preventing damage to the electronic component.

  Furthermore, in this embodiment, unlike the prior art described above, there is no need to provide a recess at the side end 15 of the substrate 11 or an elastic protrusion on the case body, so that the internal wiring routing area is not reduced. . On the other hand, in this embodiment, it is necessary to provide the convex portion 10 on the substrate 11. Such a convex portion is formed by soldering a chip component therefor and other electronic components on the surface of the substrate as described above. In the mounting (mounting) step, the cost for forming the erroneous insertion preventing means can be reduced.

  In this example, the rubber packing 51 for sealing is loaded into the packing mounting portion 47 of the cover 41 with the connector as described above before the board 11 is inserted, and then the board 11 is inserted, whereby the rubber packing is inserted. The outer peripheral surface of 51 is pressed against the inner surface (seal surface) 25 on the inlet side of the main body 21 to be embodied as a case 1 having a structure to be assembled. However, the case with a circuit board according to the present invention is not limited to such a structure. Apart from the insertion of the board 11, the case is covered with a separate and independent cover, and the inside is sealed. Of course, it can be applied even in cases where it is stopped. In the case 1 of the above form, when the substrate 11 is inserted and the cover 41 is attached to the main body 21, the cover 41 is attached to the raised claw 55 provided on the outer peripheral surface of the main body 21 on the insertion port 23 side. The cover 41 is configured to be attached to the case body 21 in a toothed shape by fitting the fitting holes 49 in the protruding pieces 48 provided on the outer periphery of the tip end side of the case. Incidentally, two case attachment legs 57 are provided on the left and right outer sides of the case main body 21 in this example at two locations.

  The present invention is not limited to the above-described embodiment, and can be embodied with appropriate modifications without departing from the scope of the invention. For example, in the above-described embodiment, the convex portions 10 are provided near the left and right side edges 15 of the surface 14 of the substrate 11. However, like the main body 21 in the above-described configuration, the stopper 35 is formed on the left and right grooves 27 on the main body 21. When the convex portion 10 is provided in the vicinity of the entrance 29 at a left-right symmetrical position, it is obvious that the convex portion 10 may be provided only at a portion near the side end of one of the left and right sides (one side) of the substrate 11. Moreover, although the said form demonstrated the case where a part of the insertion port direction wall 33 which faces the insertion port 23 side in the main body 21 was used as the stopper 35, a stopper is not limited to the thing of such a structure. Absent.

  That is, in the present invention, the circuit board is provided with a convex portion that protrudes from the substrate surface on at least one of the substrate surfaces and at least one side end portion of the tip end portion or the tip end portion at the time of insertion. The case body has a configuration in which the side edges on both sides of the circuit board can be inserted into the board guide groove and inserted into the case body when the front and back sides of the circuit board are in a normal state. Yes. On the other hand, when the front and back sides of the circuit board are in an irregular state, a stopper that hits the convex portion is formed near the entrance of the board guide groove so that the insertion of the circuit board into the case body is stopped. Good.

  In this way, when the circuit board is in an irregular state, the stopper and the convex part are formed so that the convex part provided on the board hits the stopper provided on the main body. It only has to be done. Therefore, both the stopper and the convex portion can be provided asymmetrically with respect to both opposing grooves, and can be embodied with appropriate modifications. In addition, the convex part should just be provided so that it may protrude from the board | substrate surface in the at least one side edge part in the front-end | tip at the time of insertion or a front-end | tip vicinity at the time of insertion. Therefore, in the case of FIG. 1, it is possible to form one convex portion in which the left and right convex portions are continuous on the substrate surface. Moreover, although the case where it embodied in the case where one circuit board was inserted was demonstrated in the said form, it cannot be overemphasized that this can be actualized also in the case where several sheets were inserted.

DESCRIPTION OF SYMBOLS 1 Case with a circuit board 10 Convex part 11 Circuit board 13 The tip 14 of a circuit board The surface 15 of a circuit board The side edge 17 of a circuit board The surface of a board (back surface)
21 Case body 27 Substrate guide groove 28 Opposing inner surface 29 Substrate guide groove inlet 35 Stopper E Mounting surface of a plurality of electronic components on the substrate surface

Claims (4)

With the circuit board assembled by fitting the side edges on both sides of the circuit board on which the electronic components are mounted to the board guide grooves on the inner surface facing the case body and inserting the circuit board into the case body In case
The circuit board is provided with a convex portion that protrudes from the substrate surface at least at one of the substrate surfaces, and at least one side end portion of the tip or a portion near the tip at the time of insertion,
In the case body, when the front and back of the circuit board are in a regular state, the side edges on both sides of the circuit board can be fitted into the board guide groove and inserted into the case body. When the front and back sides of the circuit board are in an irregular state, a stopper that the convex part hits is formed in the vicinity of the entrance of the board guide groove so that the insertion of the circuit board into the case body is stopped. Case with circuit board. The case with a circuit board according to claim 1, wherein at least one of the substrate surfaces is provided with a convex portion that protrudes from the substrate surface at at least one side end portion of the tip or a portion near the tip at the time of insertion. Instead of
With a circuit board, characterized in that a convex portion that protrudes from the surface of the substrate is provided on one of the substrate surfaces and on each side end portion on both sides of the distal end or the distal end portion at the time of insertion. Case. The case with a circuit board according to claim 1, wherein at least one of the substrate surfaces is provided with a convex portion that protrudes from the substrate surface at at least one side end portion of the tip or a portion near the tip at the time of insertion. Instead of
A case with a circuit board, characterized in that a convex portion that protrudes from the substrate surface is provided on one substrate surface and at one side end portion of the tip at the time of insertion or a portion near the tip. .   The circuit board according to any one of claims 1 to 3, wherein the convex portion is provided between a mounting area of the electronic component and a tip at the time of insertion in the substrate surface. With case.

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