JP2012104572A - Mount substrate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mount substrate having a new structure which facilitates checking insertion of terminal parts of electrical parts into through holes of the mount substrate and reduces false recognition in the checking.SOLUTION: Multiple through holes are provided on a printed substrate 12, and terminal parts 20, 22 of multiple electrical parts 14, 18 disposed on one surface of the printed substrate 12 are protruded on the other surface of the printed substrate 12 penetrating the multiple through holes and are soldered thereto. Further, a specific through hole identification display 48, which identifies through holes in which the terminal parts 20, 22 are not inserted, is provided on the other surface of the printed substrate 12.

Description

  The present invention relates to a mounting board in which a plurality of electrical components are mounted on a printed board.

  2. Description of the Related Art Conventionally, a mounting board in which a plurality of electrical components such as a relay and a connector are mounted on a printed board is known, and is widely used as an internal circuit of an electric junction box for automobiles. For example, those described in Japanese Patent Application Laid-Open No. 2009-38890 (Patent Document 1).

  By the way, in such a mounting board, terminal portions of a plurality of electrical components placed on one surface (front surface) of the printed board are inserted into through holes penetrating the printed board, and the other side of the printed board is placed. It protrudes to the surface (back surface) side. And these terminal parts are soldered with respect to a through hole, and the terminal part of each electric component is connected to the printed wiring and is made conductive. Therefore, it is important to confirm the soldering state of each of these electrical components to ensure connection stability.

  Then, the soldering state of the terminal part of each electrical component to the through hole is determined based on whether the terminal part is inserted into each through hole from the back side that is the surface to be soldered. It is performed by confirming matters such as whether or not filling is sufficiently performed visually.

  However, due to differences in specifications of electrical components, some terminal portions of the electrical components are not provided, and the terminal portions may not be inserted even though through holes are provided in the printed circuit board. On the other hand, as described in FIG. 7 and the like of Patent Document 1, in the rear surface side plan view of the printed circuit board, a large number of through-holes having the same or similar shapes provided in close proximity and projecting to substantially the center thereof. Only the tip of the terminal part of each electrical component can be confirmed, and the presence of the electrical component cannot be grasped. Therefore, even when there is a through hole in which the terminal part of the electrical component is not normally inserted, it may be in a normal state, or the terminal part may not be inserted into the through hole due to a defect in the terminal part, etc. There was a problem that it was difficult to determine whether it was in a certain state.

  In addition, there is a problem in that misidentification is likely to occur in the method of identifying the electrical component in which the terminal portion is not provided and the corresponding through hole and checking the presence or absence of the terminal portion while turning the printed circuit board upside down.

JP 2009-38890 A

  The present invention has been made in the background of the above-mentioned circumstances, and the solution is to facilitate the confirmation work of the insertion state of the terminal part of the electrical component into the through hole of the mounting board, and the confirmation work. It is an object of the present invention to provide a mounting substrate having a novel structure that can reduce erroneous recognition.

  A first aspect of the present invention is a mounting board in which a plurality of electrical components are mounted on a printed circuit board, wherein the printed circuit board has a plurality of through holes, and is disposed on one surface of the printed circuit board. The terminal portions of the plurality of electrical components are inserted into the plurality of through holes, protruded to the other surface of the printed circuit board and soldered, and the terminals on the other surface of the printed circuit board A specific through-hole identification display for identifying the through-hole through which no part is inserted is provided.

  According to this aspect, on the other surface (back surface) side of the printed circuit board, it is possible to easily identify a through hole through which a terminal portion of an electrical component is not inserted among a plurality of through holes. As a result, when confirming the soldering state from the back side of the printed circuit board, it is a through hole where the terminal portion is not inserted in the first place, or the terminal portion is inserted due to a defect such as a loss or bending of the terminal portion. It is possible to immediately determine whether there is any, and the work efficiency of the visual inspection of the terminal portion is greatly improved. The specific through-hole identification display is preferably one that can be easily identified, such as a frame display that surrounds the peripheral area of the through-hole through which the terminal portion is not inserted, or a display that fills the peripheral area with color. Moreover, the aspect which makes a specific through hole identifiable easily by attaching | subjecting a symbol, a character, etc. to the peripheral region of the through hole into which a terminal part is not penetrated is also included.

  According to a second aspect of the present invention, in the mounting substrate according to the first aspect, a component unit identification display for identifying the plurality of through holes for each of the electrical components is provided on the other surface of the printed circuit board. It is what has been.

  According to this aspect, the combination of the specific through-hole identification display and the component unit identification display makes it easy to determine whether or not the terminal portion is defective and to identify the corresponding component when there is a terminal portion failure. Further, the efficiency of the visual confirmation work of the solder failure is further improved.

  According to the mounting board according to the present invention, by providing the specific through-hole identification display in the through-hole in which the terminal part of the electrical component is not inserted in a normal state, the through-hole in which the terminal is not inserted is connected to the terminal part or the component. Easily determine from the other surface (back surface) side of the printed circuit board whether the terminal portion is not inserted due to a defect or the like, or whether it is a through hole where the terminal portion is not inserted in a normal state be able to. Accordingly, it is possible to advantageously improve the workability of the visual inspection of the terminal portion performed after soldering or the like.

The perspective view which shows the principal part by the side of the back surface of the mounting board | substrate as 1st embodiment of this invention. The top view of the back surface side of the printed circuit board shown in FIG. The top view of the back surface side of the mounting board | substrate shown in FIG. The top view of the back surface side of the printed circuit board which comprises the mounting substrate as 2nd embodiment of this invention. The top view of the back surface side of the printed circuit board which comprises the mounting substrate as another embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, FIG. 1 shows a main part on the back surface side of the mounting substrate 10 as the first embodiment of the present invention. The mounting substrate 10 is configured by mounting a plurality of relays 14 as electrical components and a connector 18 as an electrical component including a plurality of terminal fittings 16 on a printed circuit board 12. These connectors 18 and relays 14 are arranged on the surface as one surface of the printed circuit board 12, and the terminal portions 20 of the relays 14 and the connectors 18 are connected to the back surface as the other surface of the printed circuit board 12. The terminal portions 22 are protruded and soldered.

  The relay 14 is conventionally known and has a structure in which a plurality of (in the present embodiment, five) terminal portions 20 protrude from a component body 24 having a rectangular block shape.

  The plurality of terminal fittings 16 constituting the connector 18 are formed of a copper alloy or the like, or are rectangular rod-shaped fittings plated with a copper alloy or the like. One end of the terminal fitting 16 is a connection portion 26 connected to a separate female connector (not shown), and the other end is a terminal portion 22 soldered to the printed circuit board 12. . And these terminal metal fittings 16 are structured to be supported by being penetrated and fixed to a base plate 28 made of synthetic resin.

  In FIG. 2, the principal part of the back surface side of the printed circuit board 12 is shown. The printed board 12 has a structure in which a printed wiring made of a conductive material such as a copper foil (not shown) is provided on an insulating board such as paper phenol or glass epoxy. The printed board 12 has a plurality of through holes 34, 36a to 36l penetrating in the thickness direction. In the present embodiment, the two relay mounting portions 38 to which each relay 14 is mounted are each configured to include five through holes 34, and the connector mounting portion 40 to which the connector 18 is mounted is 12 The through holes 36a to 36l are included. The five through holes 34 constituting each relay mounting portion 38 are slightly different in size according to the size of each terminal portion 20 of the relay 14, but the through holes 36 a to 36 b constituting the connector mounting portion 40. Both 36l are formed in the same shape. A land portion 42 made of copper foil is provided around each of the through holes 34, 36a to 36l.

  In the vicinity of each through-hole 34 of the relay mounting portion 38, a circuit name 44 made up of numerals for enabling identification of the terminal portion 20 of the relay 14 inserted through each through-hole 34 is provided. Each circuit name 44 is displayed using a white silk printing paint, for example, by silk printing as is conventionally known.

  Also in the vicinity of the through holes 36a to 36l of the connector mounting portion 40, circuit names 46 made up of numerals or alphabets are provided. Each of these circuit names 46 is also displayed by silk printing using a white silk printing paint, like the circuit name 44 of the through hole 34 of the relay mounting portion 38. Here, as the circuit names 46 corresponding to the through holes 36a to 36j and 36l of the connector mounting portion 40, the connectors inserted into the through holes 36a to 36j and 36l of the connector mounting portion 40 as in the relay mounting portion 38. Numbers for identifying the 18 terminal portions 22 are displayed. On the other hand, “NC” is displayed as the circuit name 46 corresponding to the through hole 36k. Unlike the circuit names 46 of the other through holes 36a to 36j, 36l, the circuit name 46 of the through hole 36k made of the characters “NC” is surrounded by the same silk printing as the circuit name 46. A rectangular frame surrounding the name 46 is provided.

  Further, on the back surface of the printed circuit board 12, as shown in FIG. 1, a specific through hole identification display 48 for identifying that the through hole 36k is a through hole into which the terminal portion 22 of the connector 18 is not inserted is provided. It has been. In the present embodiment, the specific through-hole identification display 48 is a frame-shaped display that surrounds the through-hole 36k and the circuit name 46 consisting of the characters “NC” in a substantially rectangular shape with a constant line width. . Thus, among the plurality of through holes 34, 36a to 36l formed in the printed circuit board 12, only the through hole 36k is surrounded by the specific through hole identification display 48, and the other through holes 34, 36a to 36j, 36l It is possible to distinguish. The specific through-hole identification display 48 is preferably formed using silk printing in the same manner as the circuit names 44 and 46. Although any color can be adopted as the color of the specific through-hole identification display 48 in the present embodiment, the circuit names 44 and 46 and the specific through-hole identification display 48 are formed in the same color such as white, for example. The names 44 and 46 and the specific through hole identification display 48 can be efficiently formed in the same silk printing process.

  The mounting board 10 is configured by mounting the relays 14, the connectors 18, and other well-known electric components (not shown) on the printed board 12. Specifically, each relay 14 and connector 18 are mounted as follows, for example. First, the five terminal portions 20 of each relay 14 are inserted into the through holes 34 of the respective relay mounting portions 38 from the surface side of the printed circuit board 12. In the connector 18, first, each terminal fitting 16 is inserted into the base plate 28 and supported, and then each terminal portion 22 is connected to the through hole 36 a of the connector mounting portion 40 from the surface side of the printed circuit board 12. 36j and 36l are respectively inserted. Note that the terminal portion 22 of the connector 18 is not inserted into the through hole 36k, and the inside of the through hole 36k is left empty. In this state, the terminal portions 20 and 22 of the relays 14 and the connectors 18 are inserted into the through holes 34, 36a to 36j and 36l, and the through holes 34, 36a to 36l and the terminal portions 20 and 22 are connected. Then, soldering using the solder 50 is performed.

  As a result, as shown in FIGS. 1 and 3, the solder 50 is filled in the through holes 34, 36a to 36l, and the printed wiring of the printed circuit board 12 and the terminal portions 20, 22 are electrically connected to each other. Is done. As a result, each relay 14 is soldered in a state in which the component main body 24 is disposed on the front surface side and the terminal portion 20 is inserted into the through hole 34 and protrudes to the back surface side of the printed circuit board 12. It is attached to the attachment part 38. The connector 18 is soldered in a state where the base plate 28 and the connecting portion 26 are disposed on the front surface side, and the terminal portion 22 is inserted through the through holes 36a to 36j and 36l and protrudes to the back surface side of the printed circuit board 12. Attached to the connector mounting portion 40. At this time, the terminal portion 22 of the connector 18 is not inserted into the through hole 36k, and only the solder 50 is filled.

  When the soldering is completed, a confirmation operation such as a solder failure is performed from the back side of the mounting substrate 10. That is, the operator confirms whether or not the soldering is performed satisfactorily in each of the through holes 34, 36a to 36j, 36l, and does not cause defects such as a breakage or bending of the terminal portions 20, 22. It is confirmed whether or not the terminal portions 20 and 22 protrude correctly from the through holes 34, 36a to 36j and 36l, respectively. Further, regarding the through hole 36k provided with the specific through hole identification display 48, as shown in FIGS. 1 and 3, the terminal portion 22 is not inserted and only the solder 50 is filled. Is confirmed.

  Here, according to the mounting substrate 10 according to the present embodiment, since the specific through-hole identification display 48 is provided in the through-hole 36k from which the terminal portion 22 does not protrude, the operator can confirm that the through-hole 36k It can be easily recognized that the terminal portion 22 is not inserted according to regular specifications, rather than being in a state in which the terminal portion 22 does not exist due to a defect or a bend. That is, according to the present embodiment, due to the difference in specifications of the connector 18, some of the electrical components are in a state where the terminal portion 22 or the like does not exist. As a result, the terminal portion 22 is originally inserted on the printed circuit board 12. Even when there is a through hole 36k that is not connected, the operator may be in a normal state, or the terminal portion 22 may not be inserted into the through hole 36k due to a defect in the terminal portion 22 or the like, and there is a risk of poor connection. Can be easily identified. In particular, since the specific through-hole identification display 48 is a frame display that surrounds the peripheral area of the through-hole 36k, it is easier for the operator to visually confirm and the work efficiency at the time of confirmation is improved. .

  In addition, according to the present embodiment, since the specific through hole identification display 48 is provided on the back surface of the printed circuit board 12, the through hole 36k is a terminal according to a regular specification only by visual inspection from the back surface side of the printed circuit board 12. It can be confirmed that the portion 22 is a through hole that is not inserted. That is, according to the present embodiment, in order to determine which through hole is the through hole 36k through which the terminal portion 22 is not inserted among the plurality of through holes 34, 36a to 36l as in the conventional confirmation work. In addition, the work of reversing the front and back of the printed circuit board 12 and confirming the interrelationship between the relays 14 and connectors 18 on the front surface side and the terminal portions 20 and 22 on the back surface side can be eliminated. As a result, not only can the work efficiency be improved, but the operator may erroneously recognize which of the plurality of through holes 34, 36a to 36l is the specific through hole 36k due to the reversal. Can be resolved. Moreover, according to this embodiment, since the confirmation work of the defect of the terminal parts 20 and 22 can be performed simultaneously with the confirmation work such as the soldering failure performed by visual observation from the back side of the printed circuit board 12, the confirmation work Efficiency.

  In addition, in the present embodiment, the circuit names 44 and 46 of the through holes 34, 36a to 36j and 36l through which the terminal portions 20 and 22 are inserted are all configured by numbers, while the terminal portions 20 and 22 Only the circuit name 46 of the through-hole 36k that is not inserted is composed of the letters “NC” in alphabetical notation and is surrounded by a rectangular frame. In the present embodiment, through such differences, the through holes 34, 36a to 36j, 36l through which the terminal portions 20, 22 are inserted and the through holes 36k through which the terminal portions 20, 22 are not inserted are more easily distinguished. ing. In the present embodiment, the specific through-hole identification display 48 is configured by a frame line that collectively surrounds the through-hole 36k and its circuit name 46. The circuit line 46 that surrounds only the circuit name 46 and the circuit name 46 of the through hole 36k may be different from the circuit names 46 of the other through holes 34, 36a to 36j, 36l.

  Furthermore, according to the present embodiment, a plurality of types of mounting boards 10 on which electrical components such as a plurality of types of relays 14 and connectors 18 having different numbers and positions of the terminal portions 20 and 22 are mounted due to differences in specifications are provided. Even in the case of manufacturing, it is possible to meet all specifications without preparing a plurality of types of printed circuit boards 12 in which the numbers and positions of the through holes 34, 36a to 36l formed in the printed circuit board 12 are changed. A single type common printed circuit board 12 having holes 34, 36a to 36l is prepared, and the specific through hole identification display 48 is printed at a different position for each specification, thereby complicating the confirmation work. In addition, a plurality of types of mounting boards 10 can be manufactured at low cost.

  Next, the principal part of the printed circuit board 52 which comprises the mounting board | substrate as 2nd embodiment of this invention is shown in FIG. In the following description, members and parts having the same structure as in the first embodiment are denoted by the same reference numerals as those in the first embodiment in the drawing, and the description thereof is omitted as appropriate. To do.

  On the back surface of the printed circuit board 52, the through holes 34, 36a to 36l of each relay mounting part 38 and the connector mounting part 40 are identified for each electrical part such as the relay 14 and the connector 18 mounted on the printed circuit board 52. Identification indications 54 and 56 are provided. The component unit identification display 54 of the relay mounting portion 38 has a rectangular frame shape substantially equal to the planar view shape of the component main body 24 of each relay 14 disposed on the surface side of the printed circuit board 52, and each relay mounting portion 38. It is made into the line surrounding the outer periphery. In addition, the component unit identification display 56 of the connector mounting portion 40 has a rectangular frame shape substantially equal to the planar view shape of the base plate 28 of the connector 18 disposed on the front surface side of the printed circuit board 52. It is made into the line surrounding the outer periphery.

  That is, each of the five through holes 34 provided in each relay mounting portion 38 is surrounded by the component unit identification display 54 and positioned within the frame of the component unit identification display 54. Further, twelve through holes 36 a to 36 l provided in the connector mounting portion 40 are surrounded by the component unit identification display 56 and positioned within the frame of the component unit identification display 56. Thus, the plurality of through holes 34, 36a to 36l formed in the printed circuit board 52 are surrounded by the component unit identification displays 54, 56 in units corresponding to the relays 14 and the connectors 18, and the through holes 34, 36a to 36l can be distinguished in units of electric parts. The component unit identification displays 54 and 56 are preferably formed using silk printing, like the circuit names 44 and 46 and the specific through-hole identification display 48. Although any color can be adopted as the color of the component unit identification displays 54 and 56, the component unit identification displays 54 and 56 and the circuit names 44 and 46 and the specific through hole identification display 48 are the same color such as white. These can be efficiently formed by the same silk printing process.

  In the present embodiment, a component unit identification display that displays a plurality of through holes 34, 36a to 36l on the back surface of the printed circuit board 52 in units corresponding to the electrical components such as the relay 14 and the connector 18. By forming 54 and 56, even when the printed circuit board 52 is viewed from the back side, a large number of through holes 34 and 36a to 36l can be easily distinguished and distinguished for each electric component. As a result, for example, when the soldering failure of the terminal portions 20 and 22 and the presence or absence of the terminal portions 20 and 22 are confirmed from the back side, each terminal portion 20 and 22 corresponds to which relay 14 or connector 18. Can be easily identified. Furthermore, it is possible to easily specify to which electrical part the through hole 36k through which the terminal portions 20 and 22 provided with the specific through hole identification display 48 are not inserted belongs.

  As mentioned above, although several embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, the electrical components are not limited to connectors and relays, and various electrical components conventionally mounted on a printed circuit board can be arbitrarily employed.

  In the first and second embodiments, the specific through-hole identification display 48 is a frame-shaped line. However, the specific through-hole identification display displays a through hole through which a terminal portion is not inserted as a terminal. Various modes can be adopted as long as they can be identified from a plurality of other through holes through which the portion is inserted. For example, as shown in FIG. 5, a specific through-hole identification display 58 is obtained by coloring the area around the through-hole 36 k through which the terminal portion 22 is not inserted so as to be filled with white or other colors by silk printing or the like. May be configured. Such a specific through hole identification display 58 can also clearly distinguish the through hole 36k through which the terminal portion 22 is not inserted from the other through holes 36a to 36j and 36l. In the embodiment shown in FIG. 5, the configuration other than the specific through-hole identification display 58 is the same as that in the first embodiment, and therefore the same reference numerals as those in the first embodiment are given in the drawing. Therefore, detailed description of each part is omitted.

  Furthermore, in the second embodiment, the component unit identification displays 54 and 56 are each configured by a frame-shaped line, but the specific mode of the component unit identification display is not particularly limited. For example, the part unit identification display may be configured by coloring the entire region corresponding to the mounting position of the connector or relay so as to be painted by silk printing or the like. In particular, when a component unit identification display that colors the entire mounting area of such an electrical component is adopted, it is specified by not coloring only the periphery of the through hole where the terminal portion is not inserted. A through-hole identification display may be configured. Further, the component unit identification display may be color-coded by a plurality of colors, for example, the color of the component unit identification display may be different for each type of electrical component. Moreover, you may make it provide a component unit identification display only with respect to the electrical component provided with the through hole in which a terminal part is not penetrated among several electrical components.

  In each of the above embodiments, only one through hole 36k among the plurality of through holes 34, 36a to 36l is a through hole through which the terminal portions 20 and 22 provided with the specific through hole identification indicators 48 and 58 are not inserted. However, the number, position, etc. of the through holes through which the terminal portion provided with the specific through hole identification display is not inserted are not particularly limited. For example, when there are a plurality of through-holes through which the terminal portion is not inserted, a specific through-hole identification display may be provided for each through-hole, or the specific through-holes may be enclosed by a frame line or the like. A hole identification display may be configured. In the case where any of the plurality of electrical components is not mounted on the printed circuit board due to a difference in specifications, etc., for all the through holes corresponding to the terminal portions of the electrical components, A specific through-hole identification display may be provided.

  Furthermore, in each of the above embodiments, the specific through hole identification displays 48 and 58 are provided only on the back surfaces of the printed circuit boards 12 and 52. However, the specific through hole identification displays are also formed on the front surface side. Also good. As a result, even when the terminal part is inserted from the surface side of the through hole, the terminal part of the electrical component is in a state where the terminal part does not exist due to damage of the terminal part or the terminal due to the difference in specifications. It becomes possible for the operator to perform the insertion work while easily confirming whether or not the part is not present.

10: mounting substrate, 12, 52: printed circuit board, 14: relay (electrical component), 18: connector (electrical component), 20, 22: terminal portion, 34, 36a to 36l: through hole, 48, 58: specific through Hall identification display, 50: Solder, 54, 56: Component unit identification display

Claims (2)

In a mounting board where multiple electrical components are mounted on a printed circuit board,
While the printed circuit board has a plurality of through holes,
The terminal portions of the plurality of electrical components arranged on one surface of the printed circuit board are inserted into the plurality of through holes and protruded to the other surface of the printed circuit board, and are soldered.
The mounting board, wherein the other surface of the printed board is provided with a specific through hole identification display for identifying the through hole through which the terminal portion is not inserted.   The mounting board according to claim 1, wherein a component unit identification display for identifying the plurality of through holes for each of the electrical components is provided on the other surface of the printed circuit board.

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