WO2021152899A1

WO2021152899A1 - Electronic control device

Info

Publication number: WO2021152899A1
Application number: PCT/JP2020/034115
Authority: WO
Inventors: 敬法佐脇; 裕哉玉田; 翼今北
Original assignee: 日立Astemo株式会社
Priority date: 2020-01-27
Filing date: 2020-09-09
Publication date: 2021-08-05
Also published as: CN114467229A

Abstract

A plurality of connector patterns (71 to 78) of a circuit board (40) respectively have a plurality of connecting portions (61 to 68). The plurality of connecting portions (61 to 68) include a plurality of first connecting portions (61 to 65) and a plurality of second connecting portions (66 to 68) which are disposed to form two rows. A region between second connecting portions (66, 67) adjacent to each other constitutes a vacant region (91). At least a part of a specific connecting portion (62) is positioned between the vacant region (91) and an edge (42) of the circuit board (40). A specific pattern (72) connected to the specific connecting portion (62) is passed through the vacant region (91).

Description

Electronic control device

The present invention relates to an electronic control device on which a heat generating component is mounted.

Some electronic control devices mounted on vehicles contain a circuit board on which electronic components are mounted in a case. Regarding such an electronic control device, there is a technique disclosed in Patent Document 1.

The electronic control device is for driving a three-phase electric motor, and has a circuit board on which electronic components such as a plurality of heat generating components are mounted, two connectors arranged on the edge of the circuit board, and one surface. It has a case provided with an opening in the case for accommodating the circuit board, and a sealing member filled in the inside of the case from the opening to seal the circuit board.

One of the two connectors is a control circuit control connector that controls the switching operation of the three-phase bridge drive circuit. The other connector is a drive connector for a three-phase bridge drive circuit that drives a three-phase electric motor.

The circuit board is provided with a plurality of insertion holes into which the terminals of the drive connector are inserted. The plurality of insertion holes are arranged so as to form two rows along the edge of the circuit board. The plurality of insertion holes are conducted separately from the connector pattern provided on the circuit board.

Japanese Unexamined Patent Publication No. 2015-050274

Compared to other electronic components, a large current flows through the heat-generating components. In order to cope with this large current, the terminals of the drive connector have a flat plate shape. The insertion hole into which the flat plate-shaped terminal is inserted has an elongated hole shape and has a predetermined width (hole diameter). As a matter of course, in the circuit board, the connector pattern drawn out from the insertion hole having a predetermined width is also set to a predetermined width. Therefore, when the connector pattern is pulled out from the insertion hole of one row among the insertion holes arranged so as to form two rows, the insertion hole of the other row may be an obstacle.

An object of the present invention is to provide a technique for increasing the degree of freedom in designing a connector pattern that can be connected to a flat terminal of a connector.

According to claim 1, a circuit board on which a plurality of heat generating components are mounted and a connector arranged on the edge of the circuit board are provided, and the connector includes a plurality of flat plate-shaped terminals, and the plurality of connectors are provided. In an electronic control device, the terminals of are individually connected to a plurality of connector patterns provided on the circuit board.
The plurality of connector patterns have a plurality of connecting portions individually connected to the plurality of terminals.
The plurality of connection portions are arranged along the plurality of first connection portions arranged along the edge on which the connector is arranged and the plurality of first connection portions thereof in the circuit board. It is composed of a plurality of second connecting portions located closer to the center of the circuit board than the plurality of first connecting portions.
The area between the second connecting portions adjacent to each other is designated as an empty area.
The plurality of first connection portions include a specific connection portion in which at least a part is located between the free area and the edge of the circuit board.
An electronic control device is provided, wherein the plurality of connector patterns include a specific pattern connected to the specific connection portion, and the specific pattern passes through the free area.

As described in claim 2, preferably, an electronic component is mounted between the edge of the circuit board on which the connector is arranged and the specific connection portion.

As described in claim 3, preferably, the electronic component is a heat-generating component different from the plurality of heat-generating components.

As described in claim 4, preferably, the connector is provided on the first surface of the circuit board.
The plurality of terminals penetrate the circuit board and extend to a second surface of the circuit board opposite to the first surface.
All the plurality of heat generating parts are provided on the first surface.
A plurality of heat-generating component patterns that have conductivity and are individually connected to the plurality of heat-generating components are provided inside the circuit board or on the first surface.
A plurality of heat dissipation patterns having conductivity and heat dissipation are provided on the second surface.
The plurality of heat dissipation patterns are individually connected to the plurality of heat generating component patterns by a plurality of vias having conductivity and heat transfer properties.
The plurality of heat dissipation patterns extend to a portion where the plurality of terminals are located and are individually connected to the plurality of terminals.

As described in claim 5, preferably, the plurality of heat generating parts are covered with a single cover that diffuses heat generated from the plurality of heat generating parts.

As described in claim 6, preferably, the circuit board is housed in a case having an opening and sealed by a resin sealing member filled inside the case.

According to claim 7, the connector has a plurality of flat plate-shaped terminals and can be mounted on a circuit board.
The plurality of terminals have a plurality of connection ends that can be individually connected to a plurality of connector patterns provided on the circuit board.
The plurality of connection ends are arranged along the plurality of first connection ends arranged along the edge on which the connector is arranged and the plurality of the plurality of first connection ends in the circuit board. It is composed of a plurality of second connection ends located closer to the center of the circuit board than the plurality of first connection portions.
The area between the second connection ends adjacent to each other is defined as an empty area.
The plurality of first connection ends are provided with a connector including a specific connection end in which at least a part is located between the free area and the edge of the circuit board.

In claim 1, each connector pattern provided on the circuit board has a connecting portion connected to another flat terminal. Of the plurality of connection portions, those arranged along the edge of the circuit board on which the connectors are arranged are referred to as the plurality of first connection portions. Further, among the plurality of connection portions, those that are arranged along the plurality of first connection portions and that are located closer to the center of the circuit board than the plurality of first connection portions are those that are located on the center side of the circuit board. It is a connection part.

Assuming that the area between the second connecting portions adjacent to each other is a free area, the plurality of first connecting portions are specific connections in which at least a part is located between the free area and the edge of the circuit board. Includes parts. That is, at least a part of the specific connection portion (first connection portion) and the empty area overlap in the direction from the edge of the circuit board toward the center of the circuit board. In this case, it is possible to form a connector pattern (specific pattern) from the specific connection portion (first connection portion) toward the center side of the circuit board. Therefore, the degree of freedom in designing the connector pattern is increased.

In claim 2, the connector pattern including the specific connection portion extends from the edge of the circuit board toward the center side of the circuit board. Therefore, a space is created between the edge of the circuit board and the specific connection portion. Electronic components can be mounted in this space. The circuit board can be miniaturized by effectively utilizing the space.

In claim 3, a heat generating component is mounted between the edge of the circuit board on which the connector is arranged and the specific connection portion. Therefore, the heat of the heat-generating component is easily dissipated to the outside.

In claim 4, a plurality of heat-generating component patterns that have conductivity and individually connect a plurality of heat-generating components are provided inside the circuit board or on the first surface. A plurality of heat dissipation patterns having conductivity and heat dissipation are provided on the second surface. The plurality of heat dissipation patterns are individually connected to the plurality of heat generating component patterns by a plurality of vias having conductivity and heat transfer properties. The plurality of heat generating parts are all provided on the first surface. Since no heat generating component is provided on the second surface, a space for arranging the heat dissipation pattern is created. The area of the heat dissipation pattern can be increased, and the heat dissipation efficiency of the heat generating parts is improved.

In addition, the plurality of heat dissipation patterns extend to the part where the plurality of terminals are located and are individually connected to the plurality of terminals. Therefore, the heat of the plurality of heat generating parts can be dissipated to the outside from the plurality of terminals.

In claim 5, the plurality of heat generating parts are covered with a single cover that diffuses the heat generated from the heat generating parts. If a plurality of heat generating components are mounted on both sides of the circuit board, two covers are required. By consolidating a plurality of heat generating parts on one surface and covering them with a single cover, the number of parts of the cover can be reduced.

According to claim 6, the circuit board is housed in a case having an opening and is sealed by a resin sealing member filled inside the case. Therefore, the circuit board and the heat-generating component can be protected by the sealing member.

In claim 7, the connector is a type that can be mounted on a circuit board and has a plurality of flat plate-shaped terminals. The plurality of terminals have a plurality of connection ends that can be individually connected to the connector pattern provided on the circuit board. Of the plurality of connection ends, those arranged along the edge of the circuit board on which the connector is arranged are designated as the plurality of first connection ends. Of the plurality of connection ends, those arranged along the plurality of first connection ends and located closer to the center of the circuit board than the plurality of first connection portions are the plurality of second connection ends. And.

Assuming that the area between the second connection ends adjacent to each other is a free area, the plurality of first connection ends are specific connections in which at least a part is located between the free area and the edge of the circuit board. Includes edges. That is, at least a part of the specific connection end (first connection end) and the empty area overlap in the direction from the edge of the circuit board toward the center of the circuit board. In this case, a connector pattern (specific pattern) can be formed from the specific connection end (first connection end) toward the center side of the circuit board. Therefore, the degree of freedom in designing the connector pattern is increased.

FIG. 1A is a perspective view of an electronic control device according to an embodiment. FIG. 1B is a perspective view of a circuit board of the electronic control device of FIG. 1A. FIG. 1 (c) is a diagram illustrating a connector mounted on the circuit board of FIG. 1 (b). FIG. 2A is a diagram illustrating a first surface (surface) of the circuit board of FIG. 1B. FIG. 2B is a diagram illustrating a second surface (back surface) of the circuit board of FIG. 1 (b). FIG. 3 (a) is a view taken along the line 3 (a) of FIG. 1 (c). FIG. 3B is a diagram illustrating a connector viewed from the opening side. It is a cross-sectional view of line 4-4 of FIG. 1 (a). It is an enlarged view of a part of the 2nd surface (back surface) of the circuit board shown in FIG. 2 (b).

An embodiment of the present invention will be described below with reference to the attached figure. In the figure, Up indicates the upper part and Dn indicates the lower part.

<Example>
FIG. 1A shows an electronic control device 10 according to an embodiment. The electronic control device 10 is mounted on a vehicle such as a two-wheeled vehicle to drive a three-phase electric motor.

Refer to FIGS. 1 (a) and 1 (b). The electronic control device 10 includes a three-phase bridge drive circuit 11 that drives a three-phase electric motor, and a control circuit 12 that controls the switching operation of the three-phase bridge drive circuit 11.

The three-phase bridge drive circuit 11 has six heat-generating components 21 to 26, three capacitors 13, and a drive connector 30 (connector). The six heat generating components 21 to 26 are covered with a single cover 14 that diffuses the heat generated from the heat generating components 21 to 26.

The control circuit 12 has a control connector 15. The description of the configuration of the control circuit 12 will be omitted.

The circuit board 40 on which the capacitor 13 and the heat generating components 21 to 26 are mounted is housed in the case 16 having the opening 16a and is sealed by the resin sealing member 17.

Refer to FIGS. 1 (b) and 1 (c). The drive connector 30 is provided on the first edge 42 of the surface 41 (first surface) of the circuit board 40. The drive connector 30 includes a plurality of (for example, eight) L-shaped and flat plate-shaped first terminals 51 to eighth terminals 58, and a housing 31 that houses a part of these terminals 51 to 58. , Is equipped.

Note that the flat plate-shaped terminal refers to a terminal having a predetermined width and does not include a pin-shaped terminal. The first terminal 51 to the eighth terminal 58 may be linear flat plate terminals. That is, a connector in which the normal direction of the surface 41 is the insertion direction may be adopted.

The circuit board 40 is provided with eight insertion holes 61 to 68 (connection portions) into which the first terminal 51 to the eighth terminal 58 of the connector 30 can be individually inserted.

Refer to FIG. 2 (a). The six heat generating components 21 to 26 are arranged in a grid pattern of 2 rows and 3 columns. Of the six heat-generating components 21 to 26, those located on the second edge 43 side opposite to the first edge 42 are designated as the first heat-generating component 21 to the first heat-generating component 23 (heating component). The second heat-generating component 24 to the second heat-generating component 26 are located on the side of the first edge 42.

The surface 41 of the circuit board 40 is provided with a pattern 81 for a first heat generating component connected to the first heat generating component 21. Similarly, on the surface 41 of the circuit board 40, a pattern 82 for a second heat-generating component connected to the first heat-generating component 22 and a pattern for a third heat-generating component connected to the first heat-generating component 23. A pattern 83 is provided. The description of the pattern mounted on the second heat generating components 24 to 26 will be omitted.

Refer to FIG. 2 (b). The back surface 44 of the circuit board 40 is provided with first connector patterns 71 to eighth connector patterns 78 that are individually conductive with the insertion holes 61 to 68. The connector patterns 71 to 78 are made of copper in a layered manner. The first connector pattern 71, the second connector pattern 72, and the sixth connector pattern 76 are also three heat dissipation patterns having conductivity and heat dissipation.

Of the insertion holes 61 to 68, those arranged along the first edge 42 of the circuit board 40 are referred to as the first insertion holes 61 to 65 (first connection portion). Further, among the insertion holes 61 to 68, the insertion holes 61 to 68 are arranged along the first insertion holes 61 to 65, and the center side of the circuit board 40 is closer to the center side than the first insertion holes 61 to 5 (see arrow C). The second insertion holes 66 to 68 (second connection portion) are located at. The number of the first insertion hole and the number of the second insertion hole can be changed as appropriate.

Refer to FIGS. 3 (a) and 3 (b). The housing 31 includes a holding portion 32 that holds the first terminal 51 to the eighth terminal 58, and a bottom portion 33 that faces the surface 41 of the circuit board 40 when the drive connector 30 is mounted on the circuit board 40. , And a top plate portion 34 facing the bottom portion 33. The bottom portion 33 and the top plate portion 34 form a part of the opening 31a of the housing 31.

The first terminal 51 has a connection end 51a that can be connected to the first connector pattern 71 (see FIG. 2B) via the first insertion hole 61 (see FIG. 2A). is doing. Similarly, the second terminal 52 to the eighth terminal 58 pass through the first insertion hole 62 to the second insertion hole 68, and the second connector pattern 72 to the eighth connector pattern 78. It has a connection end 52a to a connection end 58a that can be connected to.

The connection between the terminals 51 to 58 of the drive connector 30 and the connector patterns 71 to 78 of the circuit board 40 is not limited to the plug-in structure, and any type can be used as long as it has a structure that enables conduction by contacting each other. It doesn't matter.

Of the eight connection ends 51a to 58a, those arranged along the holding portion 32 of the housing 31 are referred to as the first connection ends 51a to 55a. Of the eight connection ends 51a to 58a, those arranged along the first connection ends 51a to 55a are referred to as the second connection ends 56a to 58a. The second connection ends 56a to 58a are located farther from the holding portion 32 than the first connection ends 51a to 55a.

The first terminal 51 has an outer end 51b that can be connected to the terminal of the connector of the other party. Similarly, the second terminal 52 to the eighth terminal 58 have external ends 52b to 58b that can be connected to the terminal 5 of the connector of the other party.

Of the eight outer ends 51b to 58b, those arranged along the bottom 33 of the housing 31 are referred to as the first outer ends 51b to 55b. Of the eight outer ends 51b to 58b, those arranged along the first outer ends 51b to 55b are referred to as the second outer ends 56b to 58b. The second outer ends 56b to 58b are located closer to the top plate portion 34 of the housing 31 than the first outer ends 51b to 5b. The second outer ends 56b to 58b can be connected to a three-phase AC motor. For example, the second outer end 58b is the U phase, the second outer end 57b is the V phase, and the second outer end 56b is W. Connect with the phase.

Refer to FIG. The first connector pattern 71 (heat dissipation pattern) and the first heat generating component pattern 81 are connected by a plurality of first through-hole vias 45 (vias) having conductivity and heat transfer properties. Has been done. The pattern 81 for heat-generating components may be provided inside the circuit board 40. The via 45 may be internally filled or may be provided directly below the first heat generating component 21.

The first connection end 51a of the first terminal 51 is inserted into the first insertion hole 61 and penetrates the circuit board 40. Therefore, the first terminal 51 can be electrically connected to the pattern 81 for the first heat generating component. The first connector pattern 71 and the second heat generating component 24 overlap each other in the thickness direction of the circuit board 40.

Refer to FIGS. 2 (a) and 2 (b). Similarly, the sixth connector pattern 76 (heat dissipation pattern) and the sixth connector pattern 76 are connected by a second through-hole via 46 (via) having conductivity and heat transfer. Has been done. The sixth terminal 56 is conductive with the second heat generating component pattern 82.

The second connector pattern 72 (heat dissipation pattern) and the third heat generating component pattern 83 are connected by a third through-hole via 47 (via) having conductivity and heat transfer. There is. The second terminal 52 is conductive with the pattern 83 for the third heat generating component.

Refer to FIG. 2 (a). The first through-hole via 45 is located between the first heat generating component 21 and the second heat generating component 24. Similarly, the second through-hole via 46 is located between the first heat generating component 22 and the second heat generating component 25. The third through-hole via 47 is located between the first heat generating component 23 and the second heat generating component 26.

Refer to FIG. On the back surface 42 of the circuit board 40, the area between the second insertion holes 66 adjacent to each other and the second insertion holes 67 is designated as the first empty area 91. A part of the first insertion hole 62 (specific connection portion) is located between the first empty area 91 and the first edge 42 of the circuit board 40. The second connector pattern 72 (specific pattern) conducting with the first insertion hole 62 extends from the first edge 42 of the circuit board 40 toward the center of the circuit board 40, and is the first. It passes through the free area 91.

The lines extending from both ends of the first free area 91 in the longitudinal direction toward the first edge 42 are referred to as the first line L1 and the second line L2. The first insertion hole 62 may be located between the first line L1 and the second line L2.

As an electronic component, for example, a third heat generating component 27 is mounted between the first edge 42 of the circuit board 40 and the first insertion hole 62.

The effect of the examples will be explained.

Refer to FIG. A part of the first insertion hole 62 (specific connection portion) is located between the first empty area 91 and the first edge 42 of the circuit board 40. Therefore, the second connector pattern 72 conducting with the first insertion hole 62 may be extended toward the center side (see arrow C) of the circuit board 40 through the first empty area 91. can. Increases the degree of freedom in pattern design.

Refer to FIG. 2 (b). The area between the second insertion hole 67 adjacent to each other and the second insertion hole 568 is designated as the second empty area 92. A part of the first insertion hole 64 is located between the second free area 92 and the first edge 42 of the circuit board 40. Therefore, the fourth connector pattern 74 may pass through the second free area 92.

Refer to FIG. 2 (a). As an electronic component, for example, a third heat generating component 27 is mounted between the first edge 42 of the circuit board 40 and the first insertion hole 62. By extending the second connector pattern 72 toward the center of the circuit board 40, a space is created between the first edge 42 of the circuit board 40 and the first insertion hole 62. A third heat generating component 27 is mounted in this space. The circuit board 40 can be miniaturized by effectively utilizing the space.

In addition, since the third heat generating component 27 is arranged near the first edge 42 on the side where the drive connector 30 is provided (see FIG. 1 (c)), the heat of the third heat generating component 27 is generated. , It is easy to dissipate heat to the outside through the flat plate-shaped terminals 51 to 58 of the drive connector 30.

Refer to FIG. 3 (a). The connector 30 is viewed from the direction facing the bottom 33 of the housing 31. The area between the second connection end 56a and the second connection end 57a is designated as the third free area 93. A part of the first connection end 52a (specific connection end) is located between the third free area 93 and the holding portion 32 (the first edge 42 side of the circuit board 40) of the housing 31. It becomes. In the circuit board 40 on which the connector 30 having such a configuration is mounted, the second connector pattern 72 (specific pattern) passes through the first free area 91 (third free area 93) as described above. Can be set as. Increases the degree of freedom in pattern design.

The other effects of the examples will be explained.

Refer to FIG. The surface 41 of the circuit board 40 is provided with a first heat generating component pattern 81 connected to the first heat generating component 21. A first connector pattern 71 (heat dissipation pattern) having conductivity and heat dissipation is provided on the back surface 44 of the circuit board 40. The first pattern 71 and the first heat generating component pattern 81 are connected by a first through-hole via 45 (via). All of the first heat generating component 21 to the second heat generating component 26 are mounted on the surface 41 of the circuit board 40 (see FIG. 2A). Since the back surface 44 is not provided with the heat generating component, a space for arranging the first connector pattern 71 is created. The area of the first connector pattern 71 can be increased, and the heat dissipation efficiency of the first heat generating component 21 is increased.

In addition, the first connector pattern 71 extends to the portion where the first terminal 51 is located and is connected to the first terminal 51. The heat of the first heat generating component 21 is dissipated to the outside from the first terminal 51.

Refer to FIGS. 1 (a) and 4 (a). The first heat generating parts 21 to 23 and the second heat generating parts 24 to 26 are covered with a cover 14. If the second heat generating components 24 to 26 are mounted on the back surface 44 of the circuit board 40, two covers are required. The number of covers can be reduced by consolidating the heat generating parts 21 to 26 on the surface 41 and covering them with a single cover 14.

In addition, the circuit board 40 is housed in the case 16 provided with the opening 16a, and is sealed by the resin sealing member 17 filled inside the case 16. Therefore, the circuit board 40 can be protected by the sealing member 17.

The present invention is not limited to the examples as long as the actions and effects of the present invention are exhibited.

The electronic control device of the present invention is suitable for motorcycles.

10 ... Electronic control device 14 ... Cover 16 ... Case 17 ... Sealing members 21-23 ... First heat-generating parts (plurality of heat-generating parts)
24-26 ... Second heat-generating parts (plural heat-generating parts)
27 ... Third heat-generating component (heat-generating component separate from a plurality of heat-generating components)
30 ... Drive connector (connector)
31 ... Housing 32 ... Holding part 40 ... Circuit board 41 ... Surface (first surface)
42 ... First edge (edge)
44 ... Back side (second side)
45-47 ... 1st through-hole via to 3rd through-hole via (via)
51 to 58 ... 1st terminal to 8th terminal (terminal)
51a to 55a ... First connection end, 52a ... Specific connection end 56a to 58a ... Second connection end 61 to 65 ... First insertion hole (first connection part), 62 ... Specific connection part 66 to 68 … Second insertion hole (second connection)
71 to 78 ... 1st connector pattern to 8th connector pattern (connector pattern)
71 ... Heat dissipation pattern 72 ... Heat dissipation pattern, specific pattern 76 ... Heat dissipation pattern 81 to 83 ... First heat generation component pattern to third heat generation component pattern (heat generation component pattern)
91 to 93 ... 1st free area to 3rd free area C ... Central side of circuit board

Claims

It has a circuit board on which a plurality of heat generating components are mounted and a connector arranged on the edge of the circuit board. The connector includes a plurality of flat plate-shaped terminals, and the plurality of terminals are the circuit board. In an electronic control device that is individually connected to a plurality of conductive connector patterns provided in the
The plurality of connector patterns have a plurality of connecting portions individually connected to the plurality of terminals.
The plurality of connection portions are arranged along the plurality of first connection portions arranged along the edge on which the connector is arranged and the plurality of first connection portions thereof in the circuit board. It is composed of a plurality of second connecting portions located closer to the center of the circuit board than the plurality of first connecting portions.
The area between the second connecting portions adjacent to each other is designated as an empty area.
The plurality of first connection portions include a specific connection portion in which at least a part is located between the free area and the edge of the circuit board.
The electronic control device, wherein the plurality of patterns include a specific pattern connected to the specific connection portion, and the specific pattern passes through the free area.
The electronic control device according to claim 1, wherein an electronic component is mounted between the edge of the circuit board on which the connector is arranged and the specific connection portion.
The electronic control device according to claim 2, wherein the electronic component is a heat generating component different from the plurality of heat generating components.
The connector is provided on the first surface of the circuit board.
The plurality of terminals penetrate the circuit board and extend to a second surface of the circuit board opposite to the first surface.
All the plurality of heat generating parts are provided on the first surface.
A plurality of heat-generating component patterns that have conductivity and are individually connected to the plurality of heat-generating components are provided inside the circuit board or on the first surface.
A plurality of heat dissipation patterns having conductivity and heat dissipation are provided on the second surface.
The plurality of heat dissipation patterns are individually connected to the plurality of heat generating component patterns by a plurality of vias having conductivity and heat transfer properties.
Any one of claims 1 to 3, wherein the plurality of heat dissipation patterns extend to a portion where the plurality of terminals are located and are individually connected to the plurality of terminals. The electronic control device according to the section.
The electronic control device according to claim 4, wherein the plurality of heat generating parts are covered with a single cover that diffuses heat generated from the plurality of heat generating parts.
The fourth or fifth aspect of the present invention, wherein the circuit board is housed in a case provided with an opening and is sealed by a resin sealing member filled inside the case. The electronic control device described.
In a connector that has multiple flat terminals and can be mounted on a circuit board
The plurality of terminals have a plurality of connection ends that can be individually connected to a plurality of connector patterns provided on the circuit board.
The plurality of connection ends are arranged along the plurality of first connection ends arranged along the edge on which the connector is arranged and the plurality of the plurality of first connection ends in the circuit board. It is composed of a plurality of second connection ends located closer to the center of the circuit board than the plurality of first connection ends.
The area between the second connection ends adjacent to each other is defined as an empty area.
The plurality of first connection ends are connectors including a specific connection end in which at least a part is located between the free area and the edge of the circuit board.