Electronic circuit board

Abstract

To provide an electronic circuit board that comprises an operating component arranged at an easily accessible position.SOLUTION: A changeover switch 9 is arranged at a position not overlapping sub substrates 4 in a top view in a thickness direction of a main substrate 1.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to electronic circuit boards. [Background technology]

[0002] Patent Document 1 discloses a method in which wiring members are folded back, circuit boards are arranged to face each other, and an electronic circuit assembly is inserted into a case. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-103630 A Summary of the Invention [Problem to be solved by the invention]

[0004] A circuit board may be provided with operation parts that can be accessed and operated by a user, a serviceman, etc., depending on the maintenance or operating status of a device on which the circuit board is mounted. However, in a configuration in which two circuit boards face each other as in Patent Document 1, it can be difficult to access the operation parts.

[0005] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to improve the operability of operating components in a configuration in which a plurality of circuit boards face each other. [Means for solving the problem]

[0006] Therefore, the electronic circuit board of the present invention is an electronic circuit board comprising a main board, a sub-board arranged opposite the main board across a space and electrically connected to the main board, and an operating component provided on the main board and capable of receiving operations, wherein the operating component is arranged in a position that does not overlap with the sub-board when viewed from a direction perpendicular to the board surface of the main board. Effect of the Invention

[0007] According to the present invention, it is possible to provide an electronic circuit board in which operating components are arranged in positions that allow easy access. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a diagram showing a substrate and a sub-substrate mounted on the substrate. [Diagram 2] FIG. 2 is a diagram showing a board on which a sub-board is mounted. [Diagram 3] FIG. 2 is a plan view illustrating some of the power supply and signal lines in the substrate. [Figure 4] FIG. 13 is a diagram showing a board connected to a sub-board. [Diagram 5] FIG. 13 is a diagram showing a board connected to a sub-board. [Figure 6] FIG. 13 is a diagram showing a board connected to a sub-board. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0010] 1 is a diagram showing an electronic circuit board to which this embodiment can be applied. The electronic circuit board has a main board 1 and a sub-board 4 mounted on the main board 1. The main board 1 of this embodiment includes a board mounting connector (board connector) 5, a driving IC 2, sheet metal mounting screw holes 3, board mounting screw holes 6, a power connector 7, a FAN motor connector 8, and a changeover switch 9. The driving IC 2 operates devices such as motors and sensors provided in the device on which the electronic circuit board is mounted. The sheet metal mounting screw holes 3 are arranged in a total of six, two on each short side and three on each long side, in order to connect the main board 1 to the sheet metal of the device. The sub-boards 4 are smaller than the main board 1, and up to four of them can be mounted on the main board 1. The sub-boards 4 are arranged facing the main board 1 with a space between them. There are multiple types of sub-boards 4 with different circuit configurations to accommodate a variety of devices. Details of the sub-boards 4 will be described later.

[0011] The board mounting connectors 5 (5a, 5b, 5c, 5d) are board-to-board connectors that connect between the main board 1 and the sub-board 4. The board mounting connectors 5 are assigned with a signal line for controlling the device, and a power supply and ground (not shown) for operation. The board mounting connector 5 is provided on the front surface of the main board 1. The sub-board 4 also has a similar board mounting connector 5 provided on the back surface of the sub-board 4, and the pin layout is the same so that the sub-board 4 can be mounted in any of the four locations. The board mounting connector 5a is connected to the sub-board 4a, which will be described later, the board mounting connector 5b is connected to the sub-board 4b, which will be described later, and the board mounting connector 5c is connected to the sub-board 4c, which will be described later. The connection between the board mounting connectors 5 and the sub-board 4 will be described later in detail.

[0012] The board mounting screw holes 6 are screw holes for fixing the main board 1 and the sub-board 4 using a spacer other than a connector. The power connector 7 is a connector for supplying power and ground used in the configuration of the main board 1, and is placed on the opposite side of the main board 1 in the longitudinal direction. In other words, the power connector 7 is placed at one end of the main board 1 in the longitudinal direction, and the driver IC 2 is placed at the other end of the main board 1 in the longitudinal direction.

[0013] The main board 1 of this embodiment employs a 24V power supply capable of driving a motor. The FAN motor connector (motor connector) 8 is connected to a FAN motor provided in the device. The changeover switch 9 switches between a signal for driving the FAN motor and a signal going to the sub-board 4 side. In other words, the changeover switch 9 can switch between a motor driving state in which the driving IC 2 and the FAN motor connector 8 are connected, and a motor non-driving state in which the driving IC 2 and the board mounting connector 5a are connected. The changeover switch 9 can be accessed and operated by a user, a serviceman, or the like when the above switching is required.

[0014] It should be noted that the signal switched by the changeover switch 9 is not limited to this, and may be a signal other than a signal for driving a fan motor.

[0015] In addition, in this embodiment, a configuration in which four sub-boards 4 are attached to the main board 1 will be described, but the present invention is not limited to this. It is sufficient that the main board 1 is equipped with one or more sub-boards 4 that are smaller in size than the main board 1.

[0016] Fig. 2 is a diagram showing a main board 1 on which sub-boards 4 (4a, 4b, 4c) are mounted. Fig. 2(a) is a plan view, and Fig. 2(b) is a cross-sectional view taken along line IIb-IIb in Fig. 2(a).

[0017] In this embodiment, the power connector 7 and the FAN motor connector 8 are disposed at positions that do not overlap with the sub-board 4 in a plan view (see FIG. 2(a)) in a direction perpendicular to the board surface of the main board 1. The power connector 7 and the FAN motor connector 8 are required to be disposed at positions that do not overlap with the sub-board 4 because wiring will be connected to them in a later process.

[0018] In addition, operation components that need to be accessed and operated by a user or a serviceman, etc., depending on the maintenance or operating conditions may be used on the circuit board. In a configuration in which a sub-board is mounted on a board as in this embodiment, if an operation component (e.g., a changeover switch, etc.) is placed between the board and the sub-board, it may be difficult to access the operation component, which may reduce operability.

[0019] Therefore, in this embodiment, in order to allow a user, a serviceman, or the like to easily access the changeover switch 9 that needs to be accessed and operated, the changeover switch 9 is arranged at a position that does not overlap with the sub-board 4 when viewed in a plan view in the thickness direction of the main board 1. In this embodiment, the changeover switch 9 is arranged between the sub-boards 4 as shown in FIGS. 2(a) and 2(b). By arranging the changeover switch 9 at a position that does not overlap with the sub-board 4 in this manner, it becomes easy for a user to access and operate the changeover switch 9 depending on the maintenance or operating conditions. In this embodiment, a slide switch is used as the changeover switch 9.

[0020] In this embodiment, the driving IC 2 is also arranged at a position that does not overlap with the sub-substrate 4, but the driving IC 2 may be arranged at a position on the main substrate 1 away from the power connector 7, and may be arranged at a position that overlaps with the sub-substrate 4. This is because the driving IC 2 will not be connected to wiring or manipulated in a later process.

[0021] In addition, in the present embodiment, a changeover switch is used as an example of an operation component, but the present invention is not limited to this, and may be an electronic component (such as a potentiometer) that can be accessed and operated by a user or the like.

[0022] In this embodiment, the sheet metal mounting screw holes (fixing holes) 3 are arranged at positions that do not overlap with the sub-board 4. This allows easy connection between the main board 1 and the sheet metal of the device. In addition, in Fig. 2, the board mounting connector 5a is connected to the sub-board 4a, the board mounting connector 5b is connected to the sub-board 4b, the board mounting connector 5c is connected to the sub-board 4c, and the board mounting connector 5d is connected to the sub-board 4c. However, this is not limited to this, and the details of the connection between the board mounting connector 5 and the sub-board 4 will be described later.

[0023] 3 is a plan view showing some of the power and signal lines in the main board 1. The signal line 10 coming out of the driving IC 2 is uniquely connected to the board mounting connector 5 (5a, 5b, 5c, 5d). The illustrated signal line 10 is connected to both the board mounting connector 5a and the FAN motor connector 8. The signal line 10 is a signal line for the driving IC 2 to control the device and to receive signals from external devices. The power line 11 is a power line that supplies power supplied from the power connector 7 to the sub-board 4 via the board mounting connector 5, and also supplies power to the FAN motor via the FAN motor connector 8.

[0024] The main board 1 is provided with four board mounting connectors 5 (5a, 5b, 5c, 5d), but the board mounting connector 5a is connected to the changeover switch 9, and the board mounting connectors 5b, 5c, 5d are not connected to the changeover switch 9. Note that the connector connected to the changeover switch 9 is not limited to the board mounting connector 5a, and any one of the board mounting connectors 5b, 5c, 5d may be connected. The connection of the board mounting connector 5a will be described in detail later.

[0025] The IC (conversion IC) 12 converts the voltage of the encoder signal from the FAN motor (not shown) to match the voltage of the drive IC 2, and converts the drive signal from the drive IC 2 to a voltage for PWM control of the FAN motor. Normally, the IC 12 is mounted on the sub-board 4, but in this embodiment, the signal line from the FAN motor connector 8 to the drive IC 2 is mounted on the main board 1 because it does not pass through the sub-board 4. Since the IC 12 is a logic circuit, it is desirable to place it close to the change-over switch 9.

[0026] Noise may be induced in the power supply and ground of the circuit as the circuit operates, causing the power supply voltage to change, and the circuit may not operate stably. In particular, if the IC is placed near the power supply or ground of the circuit, the circuit may not operate stably. For this reason, it is desirable to place IC12 away from the power connector that supplies power and ground. In other words, it is required to place IC12 close to the changeover switch 9 and away from the power connector 7.

[0027] In this embodiment, the changeover switch 9 is disposed at approximately the center of the long side of the main board 1, where it does not overlap with the sub-board 4, and the IC 12 is disposed close to the changeover switch 9 and away from the power connector 7, taking into consideration wiring layout, etc. This makes it possible to suppress the effects of signal noise.

[0028] For the same reason, the driver IC 2 is also placed at a position away from the power connector 7 as described above.

[0029] Note that, even if the selector switch 9 is arranged on the opposite end of the main board 1 from the power connector 7 like the driving IC 2, the IC 12 can be arranged close to the selector switch 9 and away from the power connector 7. However, in consideration of efficient wiring, the arrangement of the selector switch 9 in this embodiment is preferable.

[0030] FIG. 4 is a diagram showing the control configuration in the main board 1 connected to the sub-board 4a. The main board 1 includes a control unit 101, a power supply unit 102, a voltage conversion unit 103, and a connection unit 109. The control unit 101 has a driving IC 2 and a memory (not shown), and is connected to one sub-board 4a by 20 signal lines. The power supply unit 102 corresponds to the power connector 7, and the voltage conversion unit 103 is a DC / DC converter that converts the voltage supplied from the power supply unit 102 from 24V to 5V or 3.3V. The connection unit 109 corresponds to the board connection connector 5 mounted on the main board 1. The ground notation 114 on the main board 1 represents the ground of the logic system, and the ground notation 115 represents the ground of the power system.

[0031] The sub-board 4a includes a motor connector 201, a buffer IC 202, a buffer IC 203, a FET 204, and a connection section 209. The sub-board 4a is a board that operates the motor. The motor connector 201 is a connector that connects to an external motor. The buffer IC 202 converts a signal from the control section 101 to 5V and outputs it to the motor, and the buffer IC 203 converts a signal from the motor to a voltage of 3.3V and outputs it to the control section 101. The FET 204 controls the ON / OFF of the motor power supply. The connection section 209 corresponds to the board connection connector 5a mounted on the sub-board 4-a. The ground notation 214 represents the ground of the logic system, and the ground notation 215 represents the ground of the power system.

[0032] When the sub-board 4a, which is the board that operates the motor, is connected to the board mounting connector 5a connected to the change-over switch 9, a FAN motor connected to the FAN motor connector 8 shown in Figure 3 can be used.

[0033] FIG. 5 is a diagram showing the control configuration in the main board 1 connected to the sub-board 4b. The main board 1 is the same as the main board 1 shown in FIG. 4. The sub-board 4b includes a solenoid connector 301, a FET 302, and a connection portion 309. The sub-board 4b is a board that operates the solenoid. The solenoid connector 301 is connected to an external solenoid. The FET 302 is a FET (field effect transistor) for switching the solenoid ON / OFF. The connection portion 309 corresponds to the board connection connector 5b mounted on the sub-board 4b. The ground notation 314 represents the ground of the logic system, and the ground notation 315 represents the ground of the power system.

[0034] Fig. 6 is a diagram showing a control configuration in main board 1 connected to sub-board 4c. Main board 1 is the same as main board 1 shown in Fig. 4. Sub-board 4c includes sensor connector 401, sensor connector 402, sensor connector 403, sensor connector 404, buffer IC 405, buffer IC 406, resistor 407, resistor 408, and connection portion 409. Sub-board 4c is a board that operates multiple types of sensors.

[0035] The connector 401 for the sensor is powered by 5V and has one input, one output, and a ground. The connector 402 for the sensor is powered by 5V and has one input and a ground. The connector 403 for the sensor has one input and a ground. The connector 404 for the sensor is powered by 3V and has one input and a ground. The resistor 407 is a resistor for pulling up the signal line, and the resistor 408 is a limiting resistor for controlling the current of the input signal. The connection part 409 corresponds to the board connection connector 5c mounted on the sub-board 4c. The ground notation 414 represents the ground of the logic system, and the ground notation 415 represents the ground of the power system.

[0036] Sub-board 4a, sub-board 4b, and sub-board 4c can be connected to any of board-mounted connectors 5a, 5b, 5c, and 5d. Sub-board 4b may be connected to all of board-mounted connectors 5a, 5b, 5c, and 5d, and sub-board 4a and sub-board 4c may be connected two each to any of board-mounted connectors 5a, 5b, 5c, and 5d. Also, it is not necessary for all of board-mounted connectors 5a, 5b, 5c, and 5d to be connected to sub-board 4 during use.

[0037] However, as mentioned above, the FAN motor connected to FAN motor connector 8 can only be used when sub-board 4a is connected to board-mounting connector 5a. Also, on main board 1, the side where driver IC 2 is located is the logic system circuits, and the side where power connector 7 is located is the power system circuits (see FIG. 1). For this reason, it is desirable to connect sub-board 4a and sub-board 4b, which use a relatively high voltage (24V), to board-mounting connectors 5a and 5b, and to connect sub-board 4c, which uses a relatively low voltage (5V, 3V), to board-mounting connectors 5c or 5d.

[0038] In the present embodiment, the configuration in which one changeover switch 9 is provided on the main board 1 has been described as an example, but the present invention is not limited to this. The main board 1 may be provided with a plurality of changeover switches 9. Also, to reiterate, any electronic component that can be accessed and operated by a user or the like may be used other than a changeover switch.

[0039] In the present embodiment, the sub-substrate 4 is described by taking the sub-substrate 4a for operating a motor, the sub-substrate 4b for operating a solenoid, and the sub-substrate 4c for operating a sensor as an example, but is not limited thereto. Substrates for operating components other than motors, solenoids, and sensors (e.g., pneumatic cylinders, etc.) may also be used.

[0040] In this way, the changeover switch 9 is disposed at a position that does not overlap with the sub-board 4 when viewed from above in the thickness direction of the main board 1. This makes it possible to provide an electronic circuit board that can suppress deterioration in the operability of the operating components.

[0041] The disclosure of this embodiment includes the following configuration.

[0042] (Configuration 1) The main board, a sub-board disposed opposite to the main board with a space therebetween and electrically connected to the main board; An operation component that is provided on the main board and can receive an operation; An electronic circuit board comprising: The electronic circuit board according to claim 1, wherein the operation component is disposed at a position that does not overlap with the sub-board when viewed from a direction perpendicular to a board surface of the main board.

[0043] (Configuration 2) 2. The electronic circuit board according to claim 1, wherein the operation components and the sub-board are arranged on the same side of the main board.

[0044] (Configuration 3) The electronic circuit board according to configuration 1 or 2, characterized in that the main board includes a power connector that supplies power and ground, a drive IC that operates the device, and a board connector that connects the main board and the sub-board.

[0045] (Configuration 4) 4. The electronic circuit board according to configuration 3, wherein the main board includes a plurality of the board connectors and is connectable to a plurality of the sub-boards.

[0046] (Configuration 5) The electronic circuit board according to configuration 4, wherein the operating component is disposed between the sub-boards when viewed from a direction perpendicular to the board surface of the main board.

[0047] (Configuration 6) The electronic circuit board according to any one of configurations 3 to 5, wherein the power connector is arranged at one end of the main board in the longitudinal direction, and the driving IC is arranged at the other end of the main board in the longitudinal direction.

[0048] (Configuration 7) a conversion IC mounted on the main board and capable of converting voltage between the motor and the driving IC; a motor connector that is arranged at the one end in the longitudinal direction of the main board and is connectable to a motor; 7. The electronic circuit board according to claim 6, wherein the conversion IC is disposed between the power connector and the operation components in the longitudinal direction of the main board.

[0049] (Configuration 8) 8. The electronic circuit board according to claim 7, wherein the conversion IC is disposed closer to the operation components than the power connector.

[0050] (Configuration 9) The electronic circuit board according to configuration 7 or 8, wherein the operating component is a switch for switching the destination of a signal transmitted by the driving IC between the motor connector and the sub-board.

[0051] (Configuration 10) 10. The electronic circuit board according to configuration 9, wherein the changeover switch is a slide switch that switches signals when a user slides it.

[0052] (Configuration 11) 11. The electronic circuit board according to any one of configurations 1 to 10, wherein the main board has a plurality of fixing holes for fixing the main board to an apparatus.

[0053] (Configuration 12) 12. The electronic circuit board according to any one of configurations 1 to 11, wherein the main board has a board mounting hole for fixing the sub-board via a spacer.

[0054] (Configuration 13) The electronic circuit board according to configuration 11, wherein the fixing holes are arranged at positions that do not overlap with the sub-board when viewed in a direction perpendicular to the board surface of the main board.

[0055] (Configuration 14) 14. The electronic circuit board according to any one of configurations 1 to 13, wherein the main board includes a plurality of the operating components. [Explanation of symbols]

[0056] 1 Board 2 Driver IC 4 Sub-board 5 PCB Mounting Connectors 7 Power Connector 8 FAN motor connector 9. Changeover Switch 10 Signal Line 12 IC

Claims

1. The main board, a sub-board disposed opposite to the main board with a space therebetween and electrically connected to the main board; An operation component that is provided on the main board and can receive an operation; An electronic circuit board comprising: The electronic circuit board according to claim 1, wherein the operation component is disposed at a position that does not overlap with the sub-board when viewed from a direction perpendicular to a board surface of the main board.

2. 2. The electronic circuit board according to claim 1, wherein the operation components and the sub-board are arranged on the same surface side of the main board.

3. 2. The electronic circuit board according to claim 1, wherein the main board comprises a power connector that supplies power and ground, a driver IC that operates the device, and a board connector that connects the main board and the sub-board.

4. 4. The electronic circuit board according to claim 3, wherein the main board includes a plurality of the board connectors and is connectable to a plurality of the sub-boards.

5. 5. The electronic circuit board according to claim 4, wherein the operation component is disposed between the sub-boards when viewed from a direction perpendicular to a surface of the main board.

6. 4. The electronic circuit board according to claim 3, wherein the power connector is disposed at one end of the main board in the longitudinal direction, and the driving IC is disposed at the other end of the main board in the longitudinal direction.

7. A conversion IC mounted on the main board and capable of converting voltage between the motor and the driving IC; a motor connector that is arranged at the one end in the longitudinal direction of the main board and is connectable to a motor; 7. The electronic circuit board according to claim 6, wherein the conversion IC is disposed between the power connector and the operation components in the longitudinal direction of the main board.

8. 8. The electronic circuit board according to claim 7, wherein the conversion IC is disposed closer to the operation components than the power connector.

9. 8. The electronic circuit board according to claim 7, wherein the operation part is a changeover switch for changing over a destination of a signal transmitted by the driving IC between the motor connector and the sub-board.

10. The electronic circuit board according to claim 9 , wherein the changeover switch is a slide switch that switches signals when slid by a user.

11. 2. The electronic circuit board according to claim 1, wherein the main board is provided with a plurality of fixing holes for fixing the main board to an apparatus.

12. 2. The electronic circuit board according to claim 1, wherein the main board has a board mounting hole for fixing the sub-board via a spacer.

13. 12. The electronic circuit board according to claim 11, wherein the fixing holes are arranged at positions that do not overlap with the sub-board when viewed in a direction perpendicular to a board surface of the main board.

14. 2. The electronic circuit board according to claim 1, wherein the main board includes a plurality of the operating components.

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