JP2008187071A - Printed circuit board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printed circuit board that suppresses erroneous assembling and costs even if it is a printed circuit board which allows an electronic component to be mounted thereon even when any one of different types of electronic components is selected. <P>SOLUTION: The printed circuit board is provided with a first mark 4 provided on the printed circuit board 3 so as to show the outer shape of a first buzzer (a first electronic component), a second mark 5 provided in the first mark 4 so as to show the outer shape of a second buzzer (a second electronic component), a first land part 9 for mounting the first buzzer, and a second land part 9A for mounting the second buzzer. The first land part 9 is provided so that the second buzzer is displaced with respect to the second mark 5 when the second buzzer is erroneously mounted. The second land part 9A is provided so that the first buzzer is displaced with respect to the first mark 4 when the first buzzer is erroneously mounted. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a printed circuit board that can be mounted even if any one of a plurality of types of electronic components is selected.

For example, Japanese Patent Application Laid-Open Publication No. 2004-151826 discloses a buzzer (electronic component) mounted on a printed circuit board of a vehicle display device. In the buzzer 9 of Patent Document 1, a pair of electrodes 92 (connection portion) is soldered to a copper foil (land portion) of the printed circuit board 8 to be electrically connected. The buzzer may be required to have different timbre, sound pressure, connection, etc. depending on the vehicle grade and destination. In that case, the printed circuit boards must be individually prepared in accordance with the specifications of the buzzer (particularly the connection portion).
JP 2006-119047 A

  Therefore, a printed circuit board structure that can cope with a case where a buzzer (electronic component) of a different type (specification) is required is provided. Specific examples thereof are shown in FIGS. Although not shown, the first buzzer and the second buzzer of different types have a pair of connection leads (connection portions), and the interval (pitch) between the connection leads is the same for the first buzzer and the second buzzer. It is as. FIG. 10 is a partial plan view of the printed circuit board a on which the first buzzer or the second buzzer is mounted. The insertion hole b into which the connection lead of the first or second buzzer is inserted, and the insertion hole b. Are provided with land portions c made of copper foil. In the first or second buzzer, the connection lead is inserted into the insertion hole b from the surface opposite to the side of FIG. 10 of the printed circuit board a, and is soldered to the land portion c. In FIG. 10, hatched portions are insulating resist surfaces formed on the printed circuit board a.

  FIG. 11 is a drive circuit diagram for sounding the first or second buzzer. In FIG. 11, the circuit configuration corresponding to the first buzzer includes a common circuit portion d and a diode D1, and the circuit configuration corresponding to the second buzzer includes a common circuit portion d and a resistor R1. Accordingly, the first buzzer is mounted (soldered) on the printed circuit board a on which the common circuit portion d and the diode D1 are mounted, and the second buzzer is mounted on the printed circuit board a on which the common circuit portion d and the resistor R1 are mounted. Has been implemented. The first and second buzzers are sounded based on signals from control means (not shown). Here, although not shown, the second buzzer has a low specification specification compared to the first buzzer, but the common circuit portion d has a circuit specification corresponding to the first buzzer in order to make the circuit common. . BZ shown in FIG. 11 means the first buzzer or the second buzzer. Further, in FIG. 11, both the diode D1 and the resistor R1 are described, but either one is mounted as described above.

  In this way, by making the interval between the connection leads of the first buzzer and the second buzzer, which are the connection parts, the insertion hole b (land part c) of the printed circuit board a is shared, and the diode D1 is mounted. Whether the resistor R1 is mounted or not is divided into a first buzzer printed circuit board and a second buzzer printed circuit board. Therefore, even when the first buzzer is mounted or when the second buzzer is mounted, there is no need to separately prepare the printed boards a having different insertion holes b. Further, by providing the common circuit portion d as described above, circuit components can be shared except for some circuit components.

  However, since the interval between the connection leads of the first buzzer and the second buzzer is the same and the insertion hole b (land portion c) provided in the printed circuit board a is shared, the first buzzer (or the second buzzer) is originally used. There is a possibility that the second buzzer (or the first buzzer) is erroneously mounted where the buzzer is to be mounted. In addition, since the circuit configuration may be the circuit specification corresponding to the first buzzer or the second buzzer, the circuit components are shared as described above, so that the circuit specification corresponds to the first buzzer. In the printed circuit board on which the second buzzer is mounted, the common circuit portion d is expensive.

  The present invention has been made in view of such points, and provides a printed circuit board that can suppress misassembly and cost even if it is a printed circuit board that can be mounted by selecting any of different types of electronic components. With the goal.

  In order to achieve the above object, the present invention provides a printed circuit board that can be mounted even if one of the first and second electronic components is selected, and the outer shape of the first electronic component is provided on the printed circuit board. A first mark shown, a second mark provided in the first mark and showing an outer shape of the second electronic component, a first land part for mounting the first electronic component, A second land portion for mounting the second electronic component, and the first land portion is located on the second mark when the second electronic component is erroneously mounted. The second electronic component is provided in a misaligned state, and the second land portion is located on the first mark when the first electronic component is erroneously mounted. One electronic component is provided so as to be displaced.

  Further, the first and second electronic components have a pair of connection parts mounted on the first land part or the second land part, and the connection parts have the same interval, and the printed circuit board Is provided with an insertion hole into which the connecting portion is inserted, corresponding to the first and second electronic components.

  In addition, a drive circuit for driving the first and second electronic components is provided corresponding to the first and second electronic components.

  Even if it is a printed circuit board which can be mounted even if any one of different types of electronic components is selected, a printed circuit board capable of suppressing misassembly and cost can be obtained.

  An embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the first electronic component is described as a first buzzer, and the second electronic component is described as a second buzzer.

  FIG. 1 is a side view of a first buzzer BZ1 (first electronic component) mounted on the printed circuit board of the present invention, and FIG. 2 shows a second buzzer BZ2 (mounted on the printed circuit board of the present invention). It is a side view of a 2nd electronic component. As shown in FIGS. 1 and 2, each of the first buzzer BZ1 and the second buzzer BZ2 has a main body 1, 1A and a pair of connection leads 2, 2A (connection portions). The outer shape A1 of the main body 1 of the first buzzer BZ1 is larger in diameter than the outer shape A2 of the main body 1A of the second buzzer BZ2, but the distance between the connection leads 2 and 2A of the first and second buzzers BZ1 and BZ2 B1 and B2 have the same dimensions. Further, although not shown, the first buzzer BZ1 has a higher spec specification (the second buzzer BZ2 has a lower spec specification) than the second buzzer BZ2.

  FIG. 3 is a partial plan view of the printed circuit board. The printed circuit board 3 is a phenol resin-based or epoxy resin-based hard substrate, and has an outer shape A1 of the first buzzer BZ1 and a surface on which the first buzzer BZ1 or the second buzzer BZ2 is mounted (arranged). A circular first mark 4 and second mark 5 indicating the outer shape A2 of the second buzzer BZ2 are provided (the first mark 4 and the second mark 5 are the first and second buzzers BZ1, BZ2 and the external shape do not have to match each other completely). The second mark 5 is smaller in diameter than the first mark 4, and the second mark 5 is provided in the first mark 4.

  Further, symbols (for example, BZ1 and BZ2) indicating the first buzzer BZ1 and the second buzzer BZ2 are provided near the circles of the first mark 4 and the second mark 5, respectively. The first and second marks 4 and 5 and the symbols BZ1 and BZ2 are exposed surfaces from which the copper foil 7 is exposed by removing (not providing) the resist 6 provided on the surface of the printed circuit board 3 (see FIG. 4), for example, a white circle may be provided on the resist 6 by printing. The symbols BZ1 and BZ2 serve as marks for mounting the first or second buzzer BZ1 or BZ2, but need not be provided.

  Further, in the first mark 4 and the second mark 5, the first insertion hole 8 and the second insertion through which the connection leads 2 and 2A of the first buzzer BZ1 and the second buzzer BZ2 are inserted. A hole 8A is provided. Further, the resist 6 provided around the first and second insertion holes 8 and 8A is removed (not provided) on the opposite surface of the printed circuit board 3 (the surface opposite to that in FIG. 3). A first land portion 9 and a second land portion 9A where the foil 7 is exposed are provided (see FIG. 4). In FIG. 3, the first and second land portions 9, 9 </ b> A provided on the opposite surface of the printed circuit board 3 are inside the broken circles described around the first and second insertion holes 8, 8 </ b> A. is there. The interval (pitch) between the first and second insertion holes 8 and 8A and the first and second land portions 9 and 9A is the same as the interval B1 and B2 between the connection leads 2 and 2A.

  FIG. 4 is a partial cross-sectional view showing a state in which the first buzzer BZ1 is mounted on the printed circuit board 3. The first land portion provided on the surface opposite to the printed board 3 by inserting the connection lead 2 of the first buzzer BZ1 into the first insertion hole 8 from the front side (the upper side in FIG. 4) of the printed board 3. Solder to 9. As a result, the first buzzer BZ1 is electrically connected to a driving circuit that blows sound. Although not shown, the same operation is performed when the second buzzer BZ2 is mounted.

  Next, a drive circuit for blowing the first buzzer BZ1 or the second buzzer BZ2 will be described with reference to FIG. 5A shows a first buzzer drive circuit P that drives the first buzzer BZ1, and FIG. 5B shows a second buzzer drive circuit Q that drives the second buzzer BZ2. The printed board 3 is divided into a printed board (3A) on which the first buzzer driving circuit P is mounted and a printed board (3B) on which the second buzzer driving circuit Q is mounted. Accordingly, the first buzzer BZ1 is mounted (soldered) on the printed circuit board 3A on which the first buzzer driving circuit P is mounted, and the second buzzer BZ2 is mounted on the printed circuit board 3B on which the second buzzer driving circuit Q is mounted. Is mounted (soldered). Here, the second buzzer drive circuit Q has a low specification specification (circuit specification corresponding to the second buzzer BZ2) as compared with the first buzzer drive circuit P.

  FIG. 6 is a partial front view when the first buzzer BZ1 is mounted on the printed circuit board 3A on which the first buzzer driving circuit P is mounted, so that the first buzzer BZ1 is accommodated in the first mark 4. Become. FIG. 7 is a partial front view when the second buzzer BZ2 is mounted on the printed circuit board 3B on which the second buzzer driving circuit Q is mounted. The second buzzer BZ2 is accommodated in the second mark 5. Become. The first and second buzzers BZ1 and BZ2 are sounded based on signals from a control means (not shown) such as a microcomputer.

  Next, an erroneous assembly of the first buzzer BZ1 and the second buzzer BZ2 will be described. FIG. 8 shows that the connection lead 2 of the first buzzer BZ1 is inserted into the first insertion hole 8 of the printed circuit board 3A on which the first buzzer driving circuit P is mounted and soldered to the first land portion 9. However, a state where the connection lead 2 is inserted into the second insertion hole 8A and soldered to the second land portion 9A is shown. Then, it can be clearly recognized that the position of the first buzzer BZ1 is displaced with respect to the first mark 4 as shown in FIG. Therefore, it is noticed that the first buzzer BZ1 is erroneously mounted on the printed circuit board 3A, and misassembly is suppressed.

  FIG. 9 shows that the connection lead 2A of the second buzzer BZ2 is inserted into the second insertion hole 8A of the printed circuit board 3B on which the second buzzer driving circuit Q is mounted and soldered to the second land portion 9A. However, a state where the connection lead 2A is inserted into the first insertion hole 8 and soldered to the first land portion 9 is shown. Then, as shown in FIG. 9, it can be clearly recognized that the position of the second buzzer BZ2 is displaced with respect to the second mark 5. Therefore, it is noticed that the second buzzer BZ2 is erroneously mounted on the printed circuit board 3B, and misassembly is suppressed.

  In addition, the connection lead 2A of the second buzzer BZ2 is inserted into the second insertion hole 8A of the printed board 3B on which the second buzzer driving circuit Q is mounted, and soldered to the second land portion 9A. It is also conceivable that the connection lead 2 of the first buzzer BZ1 is inserted and soldered to the second land portion 9A. Even at that time, it can be clearly recognized that the position of the first buzzer BZ1 is displaced with respect to the first mark 4 as shown in FIG. Accordingly, it is noticed that the first buzzer BZ1 is erroneously mounted on the printed circuit board 3B on which the second buzzer driving circuit Q is mounted, and erroneous assembly is suppressed.

  Further, the connection lead 2 of the first buzzer BZ1 is inserted into the first insertion hole 8 of the printed board 3A on which the first buzzer driving circuit P is mounted, and the first land portion 9 is to be soldered. It is also conceivable that the connection lead 2A of the second buzzer BZ2 is inserted and soldered to the first land portion 9. Even in that case, it can be clearly recognized that the second buzzer BZ2 is displaced with respect to the second mark 5 as shown in FIG. Therefore, the second buzzer BZ2 is erroneously mounted on the printed board 3A on which the first buzzer driving circuit P is mounted, and erroneous assembly is suppressed.

  In this way, the first mark 4 provided on the printed circuit board 3 and showing the outer shape of the first buzzer BZ1, and the second mark 5 provided in the first mark 4 and showing the outer shape of the second buzzer BZ2. And a first land portion 9 for mounting the first buzzer BZ1, and a second land portion 9A for mounting the second buzzer BZ2, and the first land portion 9 is a second land portion 9A. When the buzzer BZ2 is erroneously mounted, the second buzzer BZ2 is provided in a position shifted with respect to the second mark 5, and the second land portion 9A is provided with the first buzzer BZ1. The first buzzer BZ1 or the second buzzer BZ2 is displaced by providing the first buzzer BZ1 in a state of being displaced with respect to the first mark 4 when mounted by mistake. Can be clearly recognized and misconfiguration is suppressed

  The first and second buzzers BZ1 and BZ2 have a pair of connection leads 2 and 2A mounted on the first land portion 9 or the second land portion 9A, and the connection leads 2 and 2A are the same. A pair of connection leads are provided by providing insertion holes 8 and 8A in the printed circuit board 3 corresponding to the first and second buzzers BZ1 and BZ2, respectively. Even in the first and second buzzers BZ1 and BZ2 (electronic parts) in which the distance between 2 and 2A is the same, misassembly can be suppressed. Moreover, it is not necessary to prepare two printed circuit boards only by the difference in the insertion holes (difference between the first insertion hole 8 and the first insertion hole 8A), and the cost increase can be suppressed.

  Further, a first buzzer driving circuit P and a second buzzer driving circuit Q for driving the first and second buzzers BZ1, BZ2 are provided corresponding to the first and second buzzers BZ1, BZ2, respectively. By setting the circuit specifications to match the second buzzers BZ1 and BZ2, the cost of the second buzzer drive circuit Q on which the second buzzer BZ2 is mounted can be reduced as compared with the prior art.

  In the present embodiment, the first electronic component is the first buzzer and the second electronic component is the second buzzer. However, the first electronic component has a pair of connection portions mounted on the land portion, If this connection part is a part (for example, capacitor etc.) which is the same interval, selection is arbitrary.

  Also, using the first and second buzzers having a pair of connection leads, an insertion hole is provided in the printed circuit board, the connection lead is inserted into the insertion hole, and solder is applied to the land portion provided on the opposite surface of the printed circuit board. However, there is no insertion hole in the printed circuit board, and a land part is provided on the front side (electronic component side) of the printed circuit board, and a pair of connection parts of electronic parts (connection as in the embodiment) is connected to this land part. The lead may be omitted).

The side view of the 1st electronic component mounted in the printed circuit board of this invention. The side view of the 2nd electronic component mounted in the printed circuit board. The partial top view of the printed circuit board. The fragmentary sectional view which shows the state by which the 1st electronic component was mounted in the printed circuit board. The drive circuit figure which sounds the said 1st or 2nd electronic component. The partial front view which shows the state by which the 1st electronic component was mounted in the printed circuit board. The partial front view which shows the state by which the 2nd electronic component was mounted in the same printed circuit board. The partial front view which shows the state which the 1st electronic component tried to be mounted in error on the printed circuit board. The partial front view which shows the state which the 2nd electronic component tried to mount in error on the printed circuit board. The partial top view of the printed circuit board in which the 1st buzzer or the 2nd buzzer which shows a prior art example is mounted. The drive circuit figure which sounds the 1st or 2nd buzzer.

Explanation of symbols

BZ1 first buzzer (first electronic component)
BZ2 second buzzer (second electronic component)
2,2A Connection lead (connection part)
3 Printed circuit board 4 1st mark 5 2nd mark 8 1st insertion hole 8A 2nd insertion hole 9 1st land part 9A 2nd land part P 1st buzzer drive circuit Q 2nd buzzer drive circuit

Claims (3)

  A printed circuit board that can be mounted even if one of the first and second electronic components is selected, and a first mark that is provided on the printed circuit board and indicates an outer shape of the first electronic component, and the first mark A second mark indicating the outer shape of the second electronic component, a first land portion for mounting the first electronic component, and for mounting the second electronic component The second land portion is in a state where the second electronic component is displaced with respect to the second mark when the second electronic component is erroneously mounted. The second land portion is in a state where the first electronic component is displaced with respect to the first mark when the first electronic component is erroneously mounted. A printed circuit board characterized by being provided.   The first and second electronic components have a pair of connection parts mounted on the first land part or the second land part, and the connection parts are at the same interval. The printed circuit board according to claim 1, wherein an insertion hole into which the connection portion is inserted is provided corresponding to the first and second electronic components.   3. The printed circuit board according to claim 1, wherein a driving circuit for driving the first and second electronic components is provided corresponding to the first and second electronic components. 4. .

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