Electronic device

Abstract

This electronic device includes: a first circuit board on which a plurality of locking parts are formed; a second circuit board erected on the first circuit board; and a slot member that includes a plurality of engaging clasps, which lock onto respective locking parts, and a guide rail that guides a third circuit board to the second circuit board.

Description

Electronic device

[0001] The present disclosure relates to an electronic device.

[0002] Japanese Unexamined Patent Application Publication No. 2011-60484 discloses a fixing structure of a connector. According to Japanese Unexamined Patent Application Publication No. 2011-60484, a locking projection provided on the connector is inserted into a through hole provided on the substrate, whereby the connector is fixed to the substrate.

[0003] A better electronic device is desired.

[0004] One aspect of the present disclosure is an electronic device including a first circuit board formed with a plurality of locking portions, a second circuit board erected on the first circuit board, and a plurality of engaging claws respectively engaged with the plurality of locking portions, and a slot member including a guide rail for guiding a third circuit board on the second circuit board.

[0005] FIG. 1 is a perspective view of an electronic device according to an embodiment. FIG. 2 is an exploded perspective view of a control unit provided in the electronic device of FIG. 1. FIG. 3 is an exploded perspective view of the control unit of FIG. 2. FIG. 4 is a perspective view showing a slot member, a second circuit board, and a circuit board inserted and removed from the slot member provided in the control unit of FIG. 3. FIG. 5 is a perspective view showing a notch-shaped locking portion and an engaging claw. FIG. 6 is a plan view showing the notch-shaped locking portion and the engaging claw of FIG. 5. FIG. 7 is a plan view showing a hole-shaped locking portion according to Modification 1.

[0006] An electronic device may include a bridge board. The bridge board is erected on one circuit board provided in the electronic device. Another circuit board is connected to the erected bridge board. Thereby, one circuit board and another circuit board are electrically connected via the bridge board.

[0007] Incidentally, it is preferable that a member capable of guiding a circuit board connected to the bridge board well to the bridge board is disposed in the electronic device. Such a member is preferably good from the viewpoints of the assemblability, disassemblability, etc. of the electronic device.

[0008] Based on the above preliminary explanation, an embodiment will be described below.

[0009] (One Embodiment) Figure 1 is a perspective view of an electronic device 10 according to one embodiment. An upper perspective view of the electronic device 10 is shown in Figure 1.

[0010] The electronic device 10 is, for example, a control device for controlling industrial machinery. The industrial machinery is, for example, a robot, but is not limited to that. The electronic device 10 comprises a housing 12 and a plurality of electronic units 14 (control unit 54, power supply unit 56).

[0011] The housing 12 is a structure having a housing space 16. The housing space 16 is a space formed inside the housing 12. The housing 12 can accommodate a plurality of electronic units 14 in the housing space 16. Although not shown in the figures, the housing 12 has an opening (open portion). The plurality of electronic units 14 may be housed in the housing space 16 through this opening. A housing cover portion, which is a cover portion that covers the opening, may be detachably provided on the housing 12.

[0012] Within the enclosure space 16, multiple electronic units 14 may be adjacent to each other. For example, as shown in Figure 1, a control unit 54 and a power supply unit 56 may be adjacent to each other within the enclosure space 16. The control unit 54 is an electronic unit 14 (module) that controls industrial machinery. A more detailed explanation of the control unit 54 will be given later.

[0013] The power supply unit 56 is an electronic unit 14 (module) that supplies power to the control unit 54. The power supply unit 56 and the control unit 54 may be connected cablelessly via a connector (not shown). The power supply unit 56 comprises a plurality of power supply circuit boards 36P.

[0014] The multiple power supply circuit boards 36P are a group of boards on which power supply circuits are mounted. These power supply circuits may include current noise filters, transformer circuits, and the like. The multiple power supply circuit boards 36P may be connected cablelessly, for example, by connectors (not shown). The power supply unit 56 may further include connecting members 58 for appropriately connecting the multiple power supply circuit boards 36P to each other.

[0015] Figure 2 is an exploded perspective view of the control unit 54 provided in the electronic device 10 of Figure 1. A downward perspective view of the control unit 54 is shown in Figure 2. The connecting member 58 (described later) is not shown in Figure 2. Figure 3 is an exploded perspective view of the control unit 54 of Figure 2. The amplifier board 36A (described later) is not shown in Figure 3.

[0016] The control unit 54 comprises a plurality of circuit boards 36 and slot members 70. As shown in Figure 2, a pair of slot members 70 may be provided in the control unit 54. The plurality of circuit boards 36 include a main board (first circuit board 361) and a bridge board (second circuit board 362), which are described below. The plurality of circuit boards 36 may further include an amplifier board 36A. Similar to the power supply unit 56, the control unit 54 may include connecting members 58 for appropriately connecting the plurality of circuit boards 36 (see also Figure 1).

[0017] An electronic circuit (not shown) is mounted on the first circuit board 361. This electronic circuit may form a control circuit for controlling industrial machinery. This control circuit may include, for example, a processor, memory, etc. A board connector 72 is also provided on the first circuit board 361. The board connector 72 is disposed on the main surface 361Sa of the first circuit board 361.

[0018] The second circuit board 362 includes a plurality of relay connectors 74. The plurality of relay connectors 74 include a first relay connector 741, a second relay connector 742, and a third relay connector 743, which are described below. The plurality of relay connectors 74 may further include a fourth relay connector 744.

[0019] The first relay connector 741 is a relay connector 74 connected to the board connector 72 described above. The first relay connector 741 is connected to the board connector 72 without cables. By connecting the first relay connector 741 and the board connector 72, the second circuit board 362 is erected on the first circuit board 361.

[0020] As shown in Figure 3, the second relay connector 742 is located on the main surface 362Sa of the second circuit board 362. In contrast, the third relay connector 743 is located on the main surface 362Sb, which is the back surface of the main surface 362Sa.

[0021] The fourth relay connector 744 is a relay connector 74 connected to the amplifier board 36A. In relation to the fourth relay connector 744, the amplifier board 36A is provided with an amplifier board connector 76 that can be connected to the fourth relay connector 744 (see also Figure 2). The fourth relay connector 744 can be connected to an amplifier circuit via the amplifier board connector 76. The amplifier circuit is a circuit (not shown) mounted on the amplifier board 36A. The amplifier circuit supplies drive current to the drive system of an industrial machine. The drive system of an industrial machine includes, for example, a motor provided in the industrial machine. A control circuit (processor) mounted on the first circuit board 361 can control the amplifier circuit via the fourth relay connector 744 and the amplifier board connector 76.

[0022] In the following description, one of the pair of slot members 70 will also be referred to as the first slot member 701. In the following description, the other of the pair of slot members 70 will also be referred to as the second slot member 702. The first slot member 701 and the second slot member 702 are arranged to sandwich the second circuit board 362. More specifically, the first slot member 701 is arranged to face the main surface 362Sa of the second circuit board 362. In contrast, the second slot member 702 is arranged to face the main surface 362Sb of the second circuit board 362.

[0023] Figure 4 is a perspective view showing the slot member 70 (701) provided in the control unit 54 of Figure 3, the second circuit board 362, and the circuit board 36 (363) that is inserted into and removed from the slot member 70.

[0024] Each of the pair of slot members 70 (the first slot member 701 and the second slot member 702) is provided with a guide member 78. The guide member 78 is an insulating member that forms a slot through which the circuit board 36 can be inserted and removed. For example, a roughly rectangular tubular member made of resin is used as the guide member 78, but is not limited to this. The guide member 78 is provided with a guide rail 80 that guides the circuit board 36 toward the second circuit board 362.

[0025] In the following description, the circuit board 36 inserted into and removed from the first slot member 701 is also referred to as the third circuit board 363. The guide member 78 of the first slot member 701 guides the third circuit board 363 to the second relay connector 742 disposed on the main surface 362Sa. An electronic circuit (not shown) is mounted on the third circuit board 363. This electronic circuit forms, for example, part of the control circuit described above, but is not limited to that. The electronic circuit mounted on the third circuit board 363 may be an additional circuit for implementing additional functions in the electronic device 10 as needed to provide convenience to the user.

[0026] The third circuit board 363 is equipped with a board connector 363C. The board connector 363C is connected cablelessly to a second relay connector 742 provided on the second circuit board 362. This connects the electronic circuit mounted on the third circuit board 363 to the electronic circuit mounted on the first circuit board 361. The third circuit board 363 may also be equipped with a faceplate 38.

[0027] In the following description, the circuit board 36 inserted into and removed from the second slot member 702 is also referred to as the fourth circuit board 364 (see also Figures 2 and 3). The guide member 78 of the second slot member 702 guides the fourth circuit board 364 to the third relay connector 743 disposed on the main surface 362Sb. An electronic circuit (not shown) is mounted on the fourth circuit board 364. This electronic circuit may, but is not limited to, forming part of the control circuit described above.

[0028] The fourth circuit board 364 is equipped with a board connector 364C. The board connector 364C is connected cablelessly to the fourth relay connector 744 provided on the second circuit board 362 (see also Figure 3). This connects the electronic circuit mounted on the fourth circuit board 364 with the control circuit mounted on the first circuit board 361. Similar to the third circuit board 363, the fourth circuit board 364 may also be equipped with a faceplate 38.

[0029] Each of the pair of slot members 70 (a first slot member 701 and a second slot member 702) is further provided with engaging claws (a plurality of engaging claws) 82. The plurality of engaging claws 82 can be appropriately arranged on the slot member 70 as needed. Each of the plurality of engaging claws 82 is provided with an arm portion 84 and a hook portion 86. The arm portion 84 extends from the guide member 78 toward the first circuit board 361. The arm portion 84 is preferably flexible. The hook portion 86 protrudes from the arm portion 84 along a direction intersecting the longitudinal direction of the arm portion 84. The plurality of engaging claws 82 are engaged with each of the plurality of locking portions 88 that are pre-formed on the first circuit board 361. This installs the slot member 70 on the first circuit board 361. A more detailed description of the plurality of locking portions 88 will be given later.

[0030] One of the pair of slot members 70 is provided with a projection 90 that protrudes toward the second circuit board 362. In contrast, the other slot member 70 of the pair of slot members 70 has a pre-formed fitting hole 92 that can be fitted into the projection 90. For illustrative purposes, Figure 3 shows a case in which the guide member 78 of the first slot member 701 is provided with a projection 90, and the guide member 78 of the second slot member 702 has a fitting hole 92 formed therein. The projection 90 can be fitted into the fitting hole 92 via the second circuit board 362 by being inserted through a pre-drilled insertion hole 94 in the second circuit board 362. Alternatively, as shown in Figure 3, multiple projections 90 may be provided on the first slot member 701. In that case, multiple fitting holes 92 that can be fitted into each of the multiple projections 90 are pre-formed on the second slot member 702.

[0031] As described above, the first circuit board 361 has a plurality of locking portions 88 pre-formed on it. These plurality of locking portions 88 may include at least one of notched locking portions 88N and perforated locking portions 88H. The notched locking portion 88N is a locking portion 88 that has a shape in which the outer edge (edge ​​361E) of the first circuit board 361 is cut out. A plurality of notched locking portions 88N may be formed on the first circuit board 361. In contrast, the perforated locking portion 88H is a locking portion 88 that is perforated in the first circuit board 361. A plurality of perforated locking portions 88H may be formed on the first circuit board 361.

[0032] Figure 5 is a perspective view showing the notched locking portion 88N (88Na) and the engaging claw 82. Figure 6 is a plan view showing the notched locking portion 88Na and the engaging claw 82 of Figure 5.

[0033] At least one notched locking portion 88N (notched locking portion 88Na) may have a first partial notch 96, a second partial notch 98, a third partial notch 100, and a locking claw 102 (102A).

[0034] The first partial notch 96 is a notch that extends from the edge 361E of the first circuit board 361 in a direction intersecting the extending direction of the edge 361E. The extending direction of the edge 361E in which the first partial notch 96 shown in Figures 5 and 6 is formed coincides with the first direction D1 shown in Figures 5 and 6. The first direction D1 also coincides with the direction from the notched locking portion 88Na toward the second circuit board 362 (board connector 72). Furthermore, the direction intersecting the extending direction of the edge 361E in which the first partial notch 96 shown in Figures 5 and 6 coincides with the second direction D2 shown in Figures 5 and 6. The second direction D2 may be perpendicular to the first direction D1.

[0035] The second partial notch 98 is a notch that extends from the first partial notch 96 along the aforementioned extension direction (first direction D1). More specifically, the second partial notch 98 is a notch that extends from the first partial notch 96 in the direction opposite to the first direction D1.

[0036] The third partial notch 100 is a notch that extends from the second partial notch 98 toward the edge 361E described above. In other words, the third partial notch 100 is a notch that extends from the second partial notch 98 along the second direction D2. In further other words, the third partial notch 100 is a notch that extends from the second partial notch 98 toward the opposite direction of the second direction D2. The engaging claw 82 provided in the slot member 70 can reach the third partial notch 100 via the first partial notch 96 and the second partial notch 98.

[0037] The locking claw 102A is a part (piece) of the first circuit board 361 that is cut out by the first partial notch 96, the second partial notch 98, and the third partial notch 100. The shape of the locking claw 102A is defined by the first partial notch 96, the second partial notch 98, and the third partial notch 100. The locking claw 102A locks the engaging claw 82 that has reached the third partial notch 100. More specifically, the locking claw 102A prevents the engaging claw 82 that has reached the third partial notch 100 from returning to the second partial notch 98 or the first partial notch 96. In this way, the locking claw 102A prevents the locking state between the engaging claw 82 and the notched locking portion 88Na from being unintentionally released. More specifically, the locking claw 102A maintains a good state in which the hook portion 86 of the engaging claw 82 is hooked onto the main surface 361Sb, which is the back surface of the main surface 361Sa of the first circuit board 361.

[0038] It is preferable that a chamfered portion 104 (first chamfered portion 1041) is formed on the locking claw 102A. The first chamfered portion 1041 is a chamfered portion that forms a surface that guides the engaging claw 82 provided on the slot member 70 from the first partial notch 96 to the second partial notch 98. The user can easily move the engaging claw 82 from the first partial notch 96 to the second partial notch 98 by sliding the engaging claw 82 along the first chamfered portion 1041.

[0039] In relation to the first chamfered portion 1041, it is preferable that a chamfered portion 104 (the second chamfered portion 1042) is also formed on the arm portion 84 of the engaging claw 82 provided in the slot member 70. When the engaging claw 82 is guided along the first chamfered portion 1041, the second chamfered portion 1042 faces the first chamfered portion 1041.

[0040] At least one notch-shaped locking portion 88N (notch-shaped locking portion 88Nb) may be a simple substantially rectangular notch. A chamfered portion 104 may be formed at a portion of the edge 361E of the first circuit board 361 that is located in the direction from the second circuit board 362 toward the notch-shaped locking portion 88Nb with respect to the notch-shaped locking portion 88Nb (see also FIGS. 1 to 3).

[0041] The above-described electronic device 10 exhibits, for example, the operational effects described below.

[0042] According to the present embodiment, the guide rail 80 provided in the slot member 70 guides another circuit board 36 (the third circuit board 363) to the second circuit board 362. As a result, the user can easily connect or disconnect the third circuit board 363 to / from the second circuit board 362. Further, the slot member 70 is attached to the first circuit board 361 by a plurality of engaging claws 82. In this case, the user can easily attach and detach the slot member 70 with respect to the first circuit board 361. Therefore, the electronic device 10 is excellent in terms of assembly and disassembly.

[0043] Moreover, since the slot member 70 is attached to the first circuit board 361 by a plurality of engaging claws 82, the fixing of the slot member 70 to the first circuit board 361 can be realized without using a fastening member such as a screw. Therefore, an increase in the number of fastening members (number of parts) provided in the electronic device 10 can be suppressed.

[0044] At least one of the plurality of locking portions 88 may be a notch-shaped locking portion 88N. Thereby, the engaging claw 82 of the slot member 70 disposed in the vicinity of the edge 361E of the first circuit board 361 is satisfactorily locked to the first circuit board 361 by the notch-shaped locking portion 88N.

[0045] The notch-shaped locking portion 88N may include a first partial notch 96, a second partial notch 98, a third partial notch 100, and a locking claw 102A. Thereby, the engaging claw 82 provided on the slot member 70 is satisfactorily locked to the notch-shaped locking portion 88N.

[0046] A first chamfered portion 1041 may be formed on the locking claw 102A. Thereby, the user can easily move the engaging claw 82 from the first partial notch 96 to the second partial notch 98 along the first chamfered portion 1041.

[0047] A second chamfered portion 1042 may be formed on the arm portion 84 of the engaging claw 82. Thereby, the user can slide the second chamfered portion 1042 along the first chamfered portion 1041. As a result, the user can move the engaging claw 82 from the first partial notch 96 to the second partial notch 98 more easily. Moreover, according to the present embodiment, the arm portion 84 may have flexibility. Thereby, the arm portion 84 can move from the first partial notch 96 to the second partial notch 98 while flexing along the first chamfered portion 1041.

[0048] At least one of the first circuit board 361, the second circuit board 362, and the third circuit board 363 constitutes a part of a control unit 54 that controls industrial machines such as robots. Thereby, the electronic device 10 can function as a control device that controls industrial machines.

[0049] Furthermore, according to this embodiment, the first slot member 701 and the second slot member 702 sandwich the second circuit board 362. In this case, the second slot member 702 can function as a support member that supports the second circuit board 362 from the rear when the third circuit board 363 is connected to the second circuit board 362 through the first slot member 701. In other words, when the third circuit board 363 is connected to the second circuit board 362, the third circuit board 363 is pressed against the second circuit board 362, which can apply stress to the second circuit board 362. In that case, the second slot member 702 supports the second circuit board 362, thereby preventing deformation or damage to the second circuit board 362 due to the stress applied to it. Furthermore, the first slot member 701 can function as a support member that supports the second circuit board 362 from the rear when the fourth circuit board 364 is connected to the second circuit board 362. Therefore, the first slot member 701 can prevent deformation or damage to the second circuit board 362 when the fourth circuit board 364 is connected to the second circuit board 362 through the second slot member 702.

[0050] Furthermore, according to this embodiment, the first slot member 701, which is one of the pair of slot members 70, is provided with a projection 90. The relative position of the first slot member 701 and the second circuit board 362 is determined by inserting the projection 90 through the insertion hole 94 of the second circuit board 362. In other words, the first slot member 701 is easily and effectively positioned by inserting the projection 90 through the insertion hole 94. Also, the second slot member 702, which is the other slot member 70 of the pair of slot members 70, has a fitting hole 92 pre-formed therein. The fitting hole 92 engages with the projection 90 through which the second circuit board 362 is inserted. This determines the relative position of the second slot member 702, the first slot member 701, and the second circuit board 362. In other words, the second slot member 702 is easily and effectively positioned when the projection 90 through which the second circuit board 362 is inserted engages with the fitting hole 92. Furthermore, when the projection 90 through which the second circuit board 362 is inserted engages with the fitting hole 92, the second circuit board 362 is securely held between the pair of slot members 70.

[0051] The projection 90 is inserted into a pre-formed insertion hole 94 in the second circuit board 362 by moving the slot member 70, which is provided with the projection 90, toward the second circuit board 362. In this respect, according to this embodiment, the direction from the first partial notch 96 toward the third partial notch 100 coincides with the first direction D1. The first direction D1 is the direction from the slot member 70 toward the second circuit board 362. The process by which the slot member 70 is locked into the notched locking portion 88Na includes the step of moving the slot member 70 toward the third partial notch 100. That is, the process by which the slot member 70 is locked into the notched locking portion 88Na includes the step of moving the slot member 70 toward the second circuit board 362. In this case, the user can achieve both locking the slot member 70 into the notched locking portion 88Na and inserting the projection 90 provided on the slot member 70 into the insertion hole 94 with a single simple operation of moving the slot member 70 along the first direction D1.

[0052] One embodiment may be modified as described below. In the following description, explanations that overlap with the first embodiment will be omitted as appropriate.

[0053] (Modification 1) Figure 7 is a plan view showing the perforated locking portion 88H (perforated locking portion 88Ha) according to Modification 1.

[0054] The perforated locking portion 88Ha has a first partial hole 106, a second partial hole 108, a third partial hole 110, and a locking claw 102 (locking claw 102B).

[0055] The first partial hole 106 is a hole that extends in a direction (second direction D2) that intersects with the direction (first direction D1) toward the second circuit board 362 (board connector 72) from the hole-shaped locking portion 88Ha (see also one embodiment). The first direction D1 can be specified according to each of the plurality of locking portions 88. For example, when the first circuit board 361 is provided with a plurality of slot members 70, the slot members 70 locked by the notched locking portion 88Na in Figures 5 and 6 may be different from the slot members 70 locked by the hole-shaped locking portion 88Ha in Figure 7. In that case, the first direction D1 in Figures 5 and 6, specified according to the notched locking portion 88Na, and the first direction D1 in Figure 7, specified according to the hole-shaped locking portion 88Ha, may be different.

[0056] The second partial hole 108 is a hole that extends from the first partial hole 106 in a direction intersecting the extending direction of the first partial hole 106. In other words, the second partial hole 108 is a hole that extends from the first partial hole 106 along the first direction D1. More specifically, the second partial hole 108 extends from the first partial hole 106 in the direction opposite to the first direction D1.

[0057] The third partial hole 110 is a hole that extends from the second partial hole 108 along the extending direction of the first partial hole 106. In other words, the third partial hole 110 is a hole that extends from the second partial hole 108 along the second direction D2. More specifically, the third partial hole 110 extends from the second partial hole 108 in the opposite direction to the second direction D2. Therefore, the engaging claw 82 provided in the slot member 70 can reach the third partial hole 110 through the first partial hole 106 and the second partial hole 108.

[0058] The locking claw 102B is a part (a portion) of the first circuit board 361 defined by the first partial hole 106, the second partial hole 108, and the third partial hole 110. The locking claw 102B locks the engaging claw 82 that has reached the third partial hole 110. More specifically, the locking claw 102B prevents the engaging claw 82 that has reached the third partial hole 110 from returning to the second partial hole 108 or the first partial hole 106. In this way, the locking claw 102B prevents the locking state between the engaging claw 82 and the hole-shaped locking portion 88H from being unintentionally released.

[0059] Preferably, a chamfered portion 104 (third chamfered portion 1043) is formed on the locking claw 102B. The third chamfered portion 1043 guides the engaging claw 82 provided in the slot member 70 from the first partial hole 106 to the second partial hole 108. The user can easily move the engaging claw 82 from the first partial hole 106 to the second partial hole 108 by sliding the engaging claw 82 along the third chamfered portion 1043.

[0060] When the engaging claw 82 is guided along the third chamfered portion 1043, the third chamfered portion 1043 may face the second chamfered portion 1042 formed on the arm portion 84 of the engaging claw 82. The user can more easily move the engaging claw 82 from the first partial hole 106 to the second partial hole 108 by sliding the second chamfered portion 1042 along the third chamfered portion 1043.

[0061] (Modification 2) The shape of the locking portion 88 formed on the first circuit board 361 is not limited to one embodiment. For example, the shape of the notched locking portion 88N may be modified as appropriate. Similarly, the shape of the hole-shaped locking portion 88H may be modified as appropriate.

[0062] Furthermore, the shape of the engaging claw 82 provided on the slot member 70 is not limited to one embodiment.

[0063] (Modification 3) Each of the pair of slot members 70 (first slot member 701, second slot member 702) may have both a projection 90 and a fitting hole 92. In this case, the projection 90 provided on the first slot member 701 fits into the fitting hole 92 formed in the second slot member 702 via the second circuit board 362. Also, the projection 90 provided on the second slot member 702 fits into the fitting hole 92 formed in the first slot member 701 via the second circuit board 362.

[0064] (Combinations of multiple variations) The above-mentioned variations may be combined as appropriate, as long as they do not contradict each other.

[0065] According to the embodiments and modifications described above, the electronic device 10 is excellent in terms of ease of assembly, ease of disassembly, and so on.

[0066] The following additional information is disclosed regarding the embodiments and modifications described above.

[0067] (Note 1) The electronic device according to the present disclosure is an electronic device (10) comprising: a first circuit board (361) having a plurality of locking portions (88) formed thereon; a second circuit board (362) erected on the first circuit board; and a slot member (70) having a plurality of engaging claws (82) that engage with each of the plurality of locking portions, and a guide rail (80) that guides a third circuit board (363) onto the second circuit board.

[0068] (Note 2) The electronic device described in Note 1 may also be an electronic device in which at least one of the plurality of locking portions is a notched locking portion (88N) having a shape in which the edge (361E) of the first circuit board is cut out.

[0069] (Note 3) The electronic device described in Note 2 may also be an electronic device having: a first partial notch (96) extending in a second direction (D2) intersecting a first direction (D1) which is the extending direction of the edge of the first circuit board; a second partial notch (98) extending from the first partial notch along the first direction; a third partial notch (100) extending from the second partial notch toward the edge; and a locking claw (102) defined by the first partial notch, the second partial notch, and the third partial notch, and which locks the engaging claw.

[0070] (Note 4) The electronic device described in Note 3 may also be an electronic device in which the locking claw has a first chamfered portion (1041) formed thereon that guides the engaging claw from the first partial notch to the second partial notch.

[0071] (Note 5) The electronic device described in Note 4 may also be an electronic device in which the engaging claw comprises a flexible arm portion (84) and a hook portion (86) protruding from the arm portion in a direction intersecting the longitudinal direction of the arm portion, and the arm portion has a second chamfered portion (1042) that faces the first chamfered portion when the engaging claw is guided along the first chamfered portion.

[0072] (Note 6) An electronic device described in any one of Notes 1 to 5, wherein at least one of the plurality of locking parts is a hole-shaped locking part (88H) drilled in the first circuit board.

[0073] (Note 7) An electronic device described in any one of Notes 1 to 6, wherein at least one of the first circuit board, the second circuit board, and the third circuit board constitutes part of a control unit (54) that controls an industrial machine.

[0074] (Note 8) The electronic device described in Note 7 may be an electronic device in which the industrial machine is a robot.

[0075] (Note 9) The electronic device described in any one of Notes 1 to 8 may further include a support member that sandwiches the second circuit board together with the slot member.

[0076] (Note 10) The electronic device described in Note 9 may also be an electronic device in which a through hole (94) is formed in the second circuit board, which is a hole that penetrates the second circuit board in the direction from the slot member toward the support member, a projection (90) that protrudes toward the through hole is provided on one of the slot member and the support member, and a fitting hole (92) that fits into the projection through which the through hole is inserted is formed on the other of the slot member and the support member.

[0077] (Note 11) The electronic device described in Note 9 or 10 may be an electronic device in which the support member is another slot member (70) that guides the fourth circuit board (364) into the second circuit board.

[0078] While this disclosure has been described in detail, it is not limited to the individual embodiments described above. These embodiments can be added, replaced, modified, partially deleted, etc., in any way that does not depart from the gist of this disclosure or from the intent of this disclosure derived from the claims and their equivalents. These embodiments can also be implemented in combination. For example, the order of operations and processes in the embodiments described above are given as examples only and are not limited thereto. The same applies when numerical values ​​or mathematical formulas are used in the description of the embodiments described above.

[0079] 10...Electronic device 54...Control unit 70...Slot member 80...Guide rail 82...Engaging claw 84...Arm part 86...Hook part 88...Locking part 88H, 88Ha...Perforated locking part 88N, 88Na, 88Nb...Notched locking part 90...Projection 92...Matching hole 94...Through hole 96...First partial notch 98...Second partial notch 100...Third partial notch 102, 102A, 102B...Locking claw 361...First circuit board 361E...Edge 362...Second circuit board 363...Third circuit board 364...Fourth circuit board 1041...First chamfered part 1042...Second chamfered part

Claims

1. An electronic device comprising: a first circuit board having a plurality of locking portions formed thereon; a second circuit board erected on the first circuit board; and a slot member having a plurality of engaging claws that lock onto each of the plurality of locking portions, and a guide rail that guides a third circuit board onto the second circuit board.

2. An electronic device according to claim 1, wherein at least one of the plurality of locking portions is a notched locking portion having a shape that cuts out the edge of the first circuit board.

3. An electronic device according to claim 2, wherein the notched locking portion comprises: a first partial notch extending in a second direction intersecting a first direction which is the extending direction of the edge of the first circuit board; a second partial notch extending from the first partial notch along the first direction; a third partial notch extending from the second partial notch toward the edge; and a locking claw defined by the first partial notch, the second partial notch, and the third partial notch, and locking the engaging claw.

4. An electronic device according to claim 3, wherein the locking claw has a first chamfered portion formed thereon that guides the engaging claw from the first partial notch to the second partial notch.

5. An electronic device according to claim 4, wherein the engaging claw comprises a flexible arm portion and a hook portion protruding from the arm portion in a direction intersecting the longitudinal direction of the arm portion, and the arm portion has a second chamfered portion that faces the first chamfered portion when the engaging claw is guided along the first chamfered portion.

6. An electronic device according to any one of claims 1 to 5, wherein at least one of the plurality of locking portions is a hole-shaped locking portion drilled in the first circuit board.

7. An electronic device according to any one of claims 1 to 6, wherein at least one of the first circuit board, the second circuit board, and the third circuit board constitutes part of a control unit for controlling an industrial machine.

8. An electronic device according to claim 7, wherein the industrial machine is a robot.

9. An electronic device according to any one of claims 1 to 8, further comprising a support member that clamps the second circuit board together with the slot member.

10. An electronic device according to claim 9, wherein the second circuit board has a through hole formed therein, which is a hole penetrating the second circuit board in a direction toward the support member from the slot member, and a projection is provided on one of the slot member and the support member that protrudes toward the through hole, and a fitting hole is formed on the other of the slot member and the support member that fits into the projection through which the through hole is inserted.

11. An electronic device according to claim 9 or 10, wherein the support member is another slot member that guides a fourth circuit board into the second circuit board.

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