Electronic device

Abstract

Provided is an electronic device capable of arranging connectors on both side walls of a housing simply and at low cost. 【Solution means】A first notch 26a is formed in the first side wall 12c of the main body housing 12, and a second notch 26b is formed in the second side wall 12d. The substrate 46 is arranged to extend between the first side wall 12c and the second side wall 12d. First connectors 32 and 34 are mounted on a first substrate edge 46c adjacent to the first notch 26a, and second connectors 36 and 38 are mounted on a second substrate edge 46d adjacent to the second notch 26b. A first complementary wall 28 that surrounds connection openings 32a and 34a, fits into the first notch 26a, and forms a surface continuous with the first side wall 12c is attached to the first substrate edge 46c. A second complementary wall 30 that surrounds connection openings 36a and 38a, fits into the second notch 26b, and forms a surface continuous with the second side wall 12d is attached to the second substrate edge 46d.

Description

Technical Field

[0001] The present invention relates to an electronic device including a substrate in a rectangular and flat housing.

Background Art

[0002] Recently, personal computers are multifunctional and are equipped with many connectors according to their functions. Since there are space constraints in notebook or tablet personal computers, many types of connectors are often distributed and arranged on both the left and right side surfaces in order to mount them.

[0003] The connectors are arranged such that their connection openings enter connector holes provided on the side surface of the housing, and consideration is given to facilitate connection of the mating plug connector.

[0004] Inside the housing of a notebook personal computer, several connectors are mounted on one side of the largest main board. At the time of assembly, the main board is inserted obliquely from the lateral direction so that the tips of these connectors are inserted into the connector holes on one side surface of the housing. Therefore, the connectors provided on the other side surface of the housing cannot be mounted on the main board because they interfere with the frame portion of the connector hole on the other side of the housing.

[0005] For this reason, in the electronic device described in Patent Document 1, a connector slidable with respect to the substrate is adopted, and at the time of assembly, it is used as a preparation position and is slid to a predetermined mounting position after assembly.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] The slidable connector described in Patent Document 1 has a special structure and is costly. In addition, the main board and the small board are arranged side by side, and connectors are mounted on each of them. However, the number of boards increases, and a relay cable or the like is required between the main board and the small board, resulting in high costs.

[0008] The present invention has been made in view of the above problems, and an object thereof is to provide an electronic device capable of arranging connectors on both side walls of a housing simply and at low cost.

Means for Solving the Problems

[0009] In order to solve the above-described problems and achieve the object, an electronic device according to an embodiment of the present invention is an electronic device including a board in a rectangular and flat housing, wherein the housing includes a first face member forming one face, a second face member forming the other face, a first side wall and a second side wall closing between the first face member and the second face member at opposing positions, a first notch is formed in the first side wall, a second notch is formed in the second side wall, the board is arranged to extend between the first side wall and the second side wall, one or more first connectors are mounted on a first board edge adjacent to the first notch, one or more second connectors are mounted on a second board edge adjacent to the second notch, a first complementary wall surrounding a connection opening of the first connector, fitting into the first notch, and forming a face continuous with the first side wall is attached to the first board edge, and a second complementary wall surrounding a connection opening of the second connector, fitting into the second notch, and forming a face continuous with the second side wall is attached to the second board edge.

Effects of the Invention

[0010] According to the above aspect of the present invention, connectors can be arranged on both side walls of the housing simply and at low cost.

Brief Description of the Drawings

[0011]

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Embodiments for Carrying Out the Invention

[0012] Hereinafter, embodiments of the electronic device according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited by this embodiment.

[0013] FIG. 1 is a perspective view of an electronic device 10 according to an embodiment of the present invention. FIG. 2 is a perspective view of the electronic device 10 with the display housing closed, seen obliquely from the right. FIG. 3 is a perspective view of the electronic device 10 with the display housing closed, seen obliquely from the left.

[0014] The electronic device 10 is a clamshell-type notebook PC in which a main body housing 12 and a display housing 14 are relatively rotatably connected by a hinge 16. The electronic device according to the present invention may also be a mobile tablet terminal or the like.

[0015] In the description of the main body housing 12, for left and right, FIG. 1 is used as a reference, and for front and rear, the side closer to the display housing 14 is the rear, and the opposite side is the front. The main body housing 12 is a rectangular and flat box. The main body housing 12 has an upper cover member 18 that forms a face material (first face material) 12a forming an upper surface (one surface), and a lower cover member 20 that includes a face material (second face material) 12b forming a lower surface (the other surface). The lower cover member 20 has a left first side wall 12c, a right second side wall 12d, a front side wall 12e, and a rear side wall 12f integrated together, and has a substantially bathtub shape with an open upper surface. The first side wall 12c and the second side wall 12d close the space between the face materials 12a and 12b at left and right opposing positions. The first side wall 12c and the second side wall 12d are inclined so as to approach each other downward (toward the side away from the upper face material 12b). Thereby, the main body housing 12 is preferably recognized as thin in terms of design.

[0016] A first notch 26a that opens upward is formed at a rearward position on the first side wall 12c, and a second notch 26b that opens upward is formed at a rearward position on the second side wall 12d. The first notch 26a and the second notch 26b are generally the same flat U shape and are notched up to a location close to the face material 12b.

[0017] A first complementary wall 28 that forms a surface continuous with the first side wall 12c is fitted into the first notch 26a. A second complementary wall 30 that forms a surface continuous with the second side wall 12d is fitted into the second notch 26b. The first complementary wall 28 is shaped to fit exactly into the first notch 26a without a gap. The second complementary wall 30 is shaped to fit exactly into the second notch 26b without a gap. The first complementary wall 28 and the second complementary wall 30 are the same color as the first side wall 12c and the second side wall 12d, and complement the first side wall 12c and the second side wall 12d in terms of design.

[0018] Connector holes 28a and 28b arranged in the front - rear direction are formed in the first complementary wall 28. Let the connector hole 28a be on the rear side and the connector hole 28b be on the front side. A connection opening 32a of a connector (first connector) 32 is exposed from the connector hole 28a. A connection opening 34a of a connector (first connector) 34 is exposed from the connector hole 28a. That is, the first complementary wall 28 surrounds the connection openings 32a and 34a.

[0019] Connector holes 30a and 30b arranged in the front - rear direction are formed in the second complementary wall 30. Let the connector hole 30a be on the rear side and the connector hole 30b be on the front side. A connection opening 36a of a connector (second connector) 36 is exposed from the connector hole 30a. A connection opening 38a of a connector (second connector) 38 is exposed from the connector hole 30a. That is, the second complementary wall 30 surrounds the connection openings 36a and 38a. The connectors 32 and 34 are mounted on a first substrate edge 46c which is the left end of a substrate 46 described later, and the connectors 36 and 38 are mounted on a second substrate edge 46d which is the right end. Plug connectors (not shown) are connected to the respective connection openings 32a, 34a, 36a, and 38a. The connectors 32 and 34 mounted on the first substrate edge 46c are also called first connectors, and the connectors 36 and 38 mounted on the second substrate edge 46d are also called second connectors.

[0020] The connector 32 is an HDMI (registered trademark) connector. The connectors 34 and 38 are USB Type-C connectors. The connector 36 is a power terminal. The connectors mounted on the first substrate edge 46c and the second substrate edge 46d are not limited to these, and may be a LAN connector, an optical connector, an audio terminal, etc. Among these, the area of the connection opening 32a of the first connector 32 is the largest, and the area of the connection opening 36a of the second connector 36 is the smallest. In other words, among the connectors 32, 34, 36, and 38, the one with the largest connection opening is assigned to the first connector, and the one with the smallest connection opening is assigned to the second connector.

[0021] The upper upper cover member 18 has a substantially flat plate shape and serves as a lid for closing the upper surface opening of the lower cover member 20. A keyboard 40 and a touch pad 41 are provided on the face material 12a of the main body housing 12. The keyboard 40 is located towards the rear, and the touch pad 41 is located towards the front. The hinge 16 connects the connecting edge of the main body housing 12 and the connecting edge of the adjacent display housing 14 so as to be relatively rotatable therebetween.

[0022] The display housing 14 is a flat box body thinner than the main body housing 12, and has a display 42 and a cover member 44 covering the back surface of the display 42. The display 42 is composed of, for example, an organic EL (OLED: Organic Light Emitting Diode) or liquid crystal.

[0023] FIG. 4 is a view of the inside of the main body housing 12 as seen from below. In FIG. 4, the lower cover member 20 is removed. Inside the main body housing 12, a substrate 46, a cooling device 48, etc. are provided. The substrate 46 is a motherboard, and the mounted CPU 47 controls the electronic device 10. The CPU 47 is mounted on the lower surface 46a of the substrate 46. The lower surface 46a is the surface facing the lower cover member 20. Most of the mounted components of the substrate 46 are mounted on the lower surface 46a, and there are few or no mounted components on the upper surface 46b on the opposite side. The cooling device 48 cools the CPU 47 and has a heat pipe 48a, two fans 48b, etc. Although not shown, the main body housing 12 is provided with a battery, a speaker, etc.

[0024] The substrate 46 extends almost across the left - right width of the main body housing 12 at a position towards the rear in the main body housing 12. That is, in the state where the lower cover member 20 is attached, the substrate 46 is arranged to extend between the first side wall 12c and the second side wall 12d. The left - hand first substrate edge 46c is adjacent to the first notch 26a, and the right - hand second substrate edge 46d is adjacent to the second notch 26b. The left - right width of the substrate 46 is slightly longer than that of the keyboard 40. The front - rear width of the substrate 46 is shorter than that of the keyboard 40. The rear edges of the substrate 46 and the keyboard 40 almost coincide. In order to thin the main body housing 12, the gap between the keyboard 40 and the substrate 46 is set to be sufficiently narrow.

[0025] The first connectors 32 and 34 are mounted on the first substrate edge 46c, and the second connectors 36 and 38 are mounted on the second substrate edge 46d. The connectors 32, 34, 36, and 38 mounted on the first substrate edge 46c and the second substrate edge 46d are in positions that do not substantially overlap the keyboard 40 in plan view. Assume that one or more connectors are mounted on each of the first substrate edge 46c and the second substrate edge 46d.

[0026] FIG. 5 is a perspective view of the first substrate edge 46c, the first side wall component 50 and its peripheral part. FIG. 6 is a perspective view of the second substrate edge 46d, the second side wall component 52 and its peripheral part. FIG. 7 is a plan view of the first substrate edge 46c, the first side wall component 50 and its peripheral part. FIG. 8 is a plan view of the second substrate edge 46d, the second side wall component 52 and its peripheral part. FIG. 9 is a perspective view of the first side wall component 50. FIG. 10 is a perspective view of the second side wall component 52. FIG. 11 is a cross-sectional view of the first substrate edge 46c and the first side wall component 50. FIG. 12 is a cross-sectional view of the second substrate edge 46d and the second side wall component 52. The first side wall component 50 and the second side wall component 52 are resin molded products and can be manufactured at low cost.

[0027] The first side wall component 50 is substantially L-shaped in a front view (see FIG. 11) and has a first complementary wall 28 and a first fixing piece 54. That is, the above-mentioned first complementary wall 28 is a part of the first side wall component 50. A chamfered portion 50a is formed between the first complementary wall 28 and the first fixing piece 54. The first complementary wall 28 becomes thicker upward.

[0028] The second side wall component 52 is substantially L-shaped in a front view (see FIG. 12) and has a second complementary wall 30 and a second fixing piece 56. That is, the above-mentioned second complementary wall 30 is a part of the second side wall component 52. A chamfered portion 52a is formed between the second complementary wall 30 and the second fixing piece 56. The second complementary wall 30 becomes thicker upward. The facing sides of the first complementary wall 28 and the second complementary wall 30 are substantially vertical planes. The first fixing piece 54 and the second fixing piece 56 each have a thickness of about 2 mm.

[0029] The first fixing piece 54 is slightly longer in the front-rear direction than the first complementary wall 28, and pin holes 58a, 58b, two fixing screw holes 60, and a substrate fixing hole 62 are formed. The pin hole 58a is near the front end, and the pin hole 58b is near the rear end. The pin hole 58a is circular, and the pin hole 58b is an oblong hole slightly longer in the front-rear direction. The two fixing screw holes 60 are near both the front and rear ends. The substrate fixing hole 62 is substantially in the center. A cylindrical portion 62a (see FIG. 11) is formed around the substrate fixing hole 62. The cylindrical portion 62a is lower than the thickness of the substrate 46.

[0030] The second fixing piece 56 is slightly longer in the front-rear direction than the second complementary wall 30, and has pin holes 58a, 58b and two fixing screw holes 60 similar to those of the first fixing piece 54. The pin hole 58a is near the rear end, and the pin hole 58b is near the front end. The two fixing screw holes 60 are near both the front and rear ends. A board fixing hole 64 is formed at approximately the center of the second fixing piece 56. A cylindrical portion 64a (see FIG. 12) is formed around the board fixing hole 64. The cylindrical portion 64a is slightly higher than the thickness of the board 46.

[0031] As shown in FIG. 7, the first board edge 46c has an irregular shape and the pin holes 58a, 58b are exposed. A fixing screw hole 46e is formed at a position corresponding to the fixing screw hole 60 on the first board edge 46c. Also, a first wall component mounting hole 46f is formed at a position corresponding to the board fixing hole 62. A cylindrical portion 62a (see FIG. 11) fits into the first wall component mounting hole 46f without a gap. The first wall component mounting hole 46f is smaller than the head of a screw 68a described later.

[0032] As shown in FIG. 8, the second board edge 46d has a shape that exposes the pin holes 58a, 58b similar to the first board edge 46c, and a fixing screw hole 46e is formed at a position corresponding to the fixing screw hole 60. Also, a second wall component mounting hole 46g is formed at a position corresponding to the board fixing hole 64. The cylindrical portion 64a (see FIG. 12) fits into the second wall component mounting hole 46g, but it is slightly larger than the cylindrical portion 64a in both the front-rear and left-right directions. The second wall component mounting hole 46g is slightly longer in the left-right direction than in the front-rear direction. The second wall component mounting hole 46g is smaller than the head of a screw 68a described later.

[0033] The first fixing piece 54 and the second fixing piece 56 are adapted to contact the upper surface 46b (the side facing the first facing material), and there is no hindrance to mounting the connectors 32, 34, 36, 38 on the lower surface 46a.

[0034] As shown in FIG. 5, the connector 34 is covered with a metal bracket 66. As shown in FIG. 6, the connector 38 is covered with the bracket 66. The bracket 66 mechanically protects the connectors 34, 38 and also serves as a shielding function.

[0035] 5 and 11, the first sidewall component 50 is attached to the first board edge 46c by the first fixing piece 54 with the screw 68a. In other words, the first complementary wall 28 is attached to the first board edge 46c via the first fixing piece 54. The screw 68a is screwed into the board fastening hole 62 from below, so that the head of the screw 68a abuts against the underside 46a of the board 46 via the fin piece of the bracket 66. This fixes the first sidewall component 50 and the first complementary wall 28 to the board 46 without any movement. However, some rotation around the board fastening hole 62 is permitted.

[0036] As shown in Figs. 6 and 12, the second sidewall part 52 has the second fixing piece 56 attached to the second board edge 46d by the screw 68a. In other words, the second complementary wall 30 is attached to the second board edge 46d via the second fixing piece 56. The screw 68a is screwed into the board fastening hole 64 from below, so that the head of the screw 68a abuts against the top surface of the tube part 64a via the fin of the bracket 66. In other words, since the head of the screw 68a does not abut directly against the board 46, the first sidewall part 50 and the first complementary wall 28 are allowed to move up and down slightly relative to the board 46. In addition, since the second wall part mounting hole 46g is slightly larger than the tube part 64a in both the front-rear and left-right directions as described above, the first sidewall part 50 and the first complementary wall 28 are allowed to move forward-rear and left-right relative to the board 46. In this manner, the second side wall component 52 and the second complementary wall 30 have a so-called floating structure, and are fixed to the base plate 46 with some movement in the length, width and height directions.

[0037] FIG. 13 is an exploded perspective view of the second substrate edge 46d of the substrate 46 in the main body housing 12, the second side wall component 52, and its peripheral portion. As shown in FIG. 13, a recess 70 into which the second fixing piece 56 of the second side wall component 52 fits is formed at the rear right end of the upper cover member 18. Pins 72 and bosses 74 are formed near the front end and the rear end of the recess 70, respectively. The pins 72 and the bosses 74 protrude downward from the bottom surface of the recess 70. The boss 74 is continuous at the same height as the portions other than the recess 70. The second fixing piece 56 fits into the recess 70 for general positioning, and is further accurately positioned by fitting the two pins 72 into the pin holes 58a and 58b.

[0038] The first side wall component 50 is fixed to the upper cover member 18 by screwing a screw 68b passing through the two fixing screw holes 60 of the first fixing piece 54 and the fixing screw hole 46e of the substrate 46 into the boss 74. That is, the substrate 46 and the first side wall component 50 are fastened together. The screw 68b may be the same as the screw 68a. Although not shown, there are similar recesses 70, pins 72, and bosses 74 at the right end of the upper cover member 18 so that the first side wall component 50 can be fixed.

[0039] FIG. 14 is a schematic cross-sectional view showing how the main body housing 12 is assembled. Before attaching the substrate 46 to the upper cover member 18, the keyboard 40, the touch pad 41, etc. are attached. Then, the first side wall component 50 is fixed to the first substrate edge 46c of the substrate 46 with the screw 68a without play, and the second side wall component 52 is fixed to the second substrate edge 46d of the substrate 46 with the screw 68a with play. At this point, the connection openings 32a, 34a, 36a, 38a of the connectors 32, 34, 36, 38 will enter the connector holes 28a, 28b, 30a, 30b and be surrounded by the first complementary wall 28 and the second complementary wall 30.

[0040] Next, the substrate 46 to which the first side wall component 50 and the second side wall component 52 are attached is positioned with respect to the upper cover member 18. Basically, it suffices to simply lower the substrate 46 directly below. The positioning is performed by inserting the pins 72 into the pin holes 58a and 58b at the four corners. At this time, although the first side wall component 50 is attached to the substrate without a moving allowance, the second side wall component 52 is attached with a moving allowance. Therefore, both the first side wall component 50 and the second side wall component 52 are accurately positioned without being affected by dimensional errors of the substrate 46 or the like.

[0041] Furthermore, the screw 68b is inserted through the fixing screw hole 60 and the fixing screw hole 46e and screwed into the boss 74 to fix the substrate 46, the first side wall component 50, and the second side wall component 52. Note that the substrate 46 is similarly fixed to the upper cover member 18 or the keyboard 40 by the screw 68b at a plurality of locations other than the locations of the first side wall component 50 and the second side wall component 52 (see FIG. 4).

[0042] It suffices to simply combine the upper cover member 18 and the lower cover member 20 in the vertical direction. As can be understood from FIG. 14, the fixing pieces 54 and 56 are in a position that overlaps with respect to the keyboard 40 in a side view, but are in a position that does not overlap in a plan view as shown in FIG. 4. That is, the spaces on both the left and right sides of the keyboard 40 are effectively utilized, and the main body housing 12 does not become thick. The fixing pieces 54 and 56 are on the upper surface 46b side of the substrate 46, on the side close to the pins 72 and the bosses 74 of the upper cover member 18, which is reasonable and improves the positioning accuracy and the fixing strength. The lower surface 46a of the substrate 46 is the main mounting surface, and there are few components on the upper surface 46b. The fixing pieces 54 and 56 do not affect the component mounting space.

[0043] Next, as shown in FIG. 14, the lower cover member 20 is placed over the upper cover member 18 to which the substrate 46 is fixed. As a result, the first complementary wall 28 fits into the first notch 26a, and the second complementary wall 30 fits into the second notch 26b. The upper cover member 18 and the lower cover member 20 are fixed by a predetermined method.

[0044] In such an electronic device 10, a first complementary wall 28 attached to the first substrate edge 46c surrounds the connection openings 32a, 34a of the first connectors 32, 34, and the first complementary wall 28 fits into the first notch 26a. Then, a second complementary wall 30 attached to the second substrate edge 46d surrounds the connection openings 36a, 38a of the second connectors 36, 38, and the second complementary wall 30 fits into the second notch 26b. That is, when the lower cover member 20 is combined with the upper cover member 18, the connection openings 32a, 34a, 36a, 38a have already entered the connector holes 28a, 28b, 30a, 30b and are properly arranged on both sides of the main body housing 12. Therefore, there is no need for a configuration such as making it slidable to avoid interference or separating the first connectors 32, 34 and the second connectors 36, 38 onto different substrates and relaying them with cables, which is simple and low-cost.

[0045] Among the connectors mounted on the first substrate edge 46c and the second substrate edge 46d as described above, the connector 32 with the largest connection opening is assigned to the first connector and mounted on the first substrate edge 46c, and the connector 36 with the smallest connection opening is assigned to the second connector and mounted on the second substrate edge 46d.

[0046] Since the connection opening 32a of the connector 32 has a large area, the corresponding connector hole 28a also becomes large, and the thickness of the surrounding first complementary wall 28 tends to be thin. In contrast, in this embodiment, since the first complementary wall 28 is fixed to the substrate 46 without a moving margin, there is almost no need to provide a gap between the connection opening 32a and the connector hole 28a, and the thickness around the connector hole 28a in the first complementary wall 28 is ensured.

[0047] Since the connection opening 36a of the connector 36 has a small area, the corresponding connector hole 30a is relatively small, and the thickness of the surrounding second complementary wall 30 tends to be thick. Therefore, the second complementary wall 30 is fixed to the substrate 46 with a moving margin in the vertical, horizontal, and height directions. However, even if the gap between the connection opening 36a and the connector hole 30a is made relatively large, there is no problem with the strength.

[0048] Since the first complementary wall 28 is not completely constrained with respect to the substrate 46 and some rotation is allowed around the substrate retaining hole 62, it can be positioned so as to form a continuous surface in the front - rear direction with respect to the first side wall 12c. The same applies to the second complementary wall 30.

[0049] In the electronic device 10, from a design perspective, the first side wall 12c and the second side wall 12d are inclined so that the upper surface side is slightly wider and the lower surface side is slightly narrower. For such inclined side surfaces, it is necessary to arrange the connectors so that the housing of the plug connector does not interfere with the frame portion of the connector hole, with the connectors protruding slightly. In this embodiment, since no assembly interference occurs, the insertion amount of each connector into the connector hole can be increased. Also, it is conceivable to reduce the insertion amount of each connector into the connector hole and make the left - right thickness of the first complementary wall 28 and the second complementary wall 30 sufficiently thin to avoid interference, but there is a concern about insufficient strength. In this embodiment, since no interference occurs between the connection opening of each connector and the connector hole, the left - right thickness of the first complementary wall 28 and the second complementary wall 30 can be increased to ensure strength.

[0050] FIG. 15 is a schematic cross - sectional view showing how the main body housing 12A according to the modified example is assembled. The main body housing 12A has the same rectangular and flat shape as the above - mentioned main body housing 12, and the lower cover member 20A is attached to the upper cover member 18A. In the main body housing 12, the first side wall 12c and the second side wall 12d were provided on the lower cover member 20, while in the main body housing 12A, they are provided on the upper cover member 18A, and the rest is the same as the main body housing 12. In such a main body housing 12A, interference between the connector and the connector hole can be avoided in the same way as in the main body housing 12. That is, the first side wall 12c and the second side wall 12d may be provided on either the upper cover member 18A or the lower cover member 20A, as long as they are in a manner that closes the space between the two face members 12a, 12b.

[0051] The present invention is not limited to the above - described embodiments, and it goes without saying that it can be freely changed without departing from the gist of the present invention.

Description of Symbols

[0052] 10 Electronic device 12, 12A Main body housing 12a Face material (first face material) 12b Face material (second face material) 12c First side wall 12d Second side wall 18, 18A Upper cover member 20, 20A Lower cover member 26a First notch 26b Second notch 28 First complementary wall 28a, 28b, 30a, 30b Connector holes 30 Second complementary wall 32, 34 Connector (first connector) 32a, 34a, 36a, 38a Connection openings 36, 38 Connector (second connector) 40 Keyboard 46 Substrate 46c First substrate edge 46d Second substrate edge 46e, 60, 4646e Fixing screw holes 46f First wall component mounting hole 46g Second wall component mounting hole 50 First side wall component 52 Second side wall component 54 First fixing piece 56 Second fixing piece

Claims

1. An electronic device having a substrate in a rectangular, flat housing, the housing includes a first surface member forming one surface, a second surface member forming the other surface, and a first side wall and a second side wall that close a gap between the first surface member and the second surface member at opposing positions; a first notch formed in the first side wall and a second notch formed in the second side wall; the substrate is disposed to extend between the first side wall and the second side wall, one or more first connectors are mounted on a first substrate edge adjacent to the first notch, and one or more second connectors are mounted on a second substrate edge adjacent to the second notch; a first complementary wall that surrounds a connection opening of the first connector, fits into the first notch, and forms a surface continuous with the first side wall, the first complementary wall being attached to the edge of the first board; A second complementary wall is attached to the second board edge, surrounding the connection opening of the second connector, fitting into the second notch, and forming a surface continuous with the second side wall.

1. An electronic device comprising:

2. 2. The electronic device according to claim 1, the first complementary wall is fixed to the substrate without any movement; The second complementary wall is fixed to the substrate with a movable margin in the length, width and height directions.

1. An electronic device comprising:

3. 3. The electronic device according to claim 2, Among the connectors mounted on the first board edge and the second board edge, the one having the largest connection opening is assigned to the first connector, and the one having the smallest connection opening is assigned to the second connector.

1. An electronic device comprising:

4. 2. The electronic device according to claim 1, The first complementary wall and the second complementary wall each have a fixing piece; The fixing piece is in contact with the side of the substrate facing the first surface member, and is fixed to a boss of the first surface member.

1. An electronic device comprising:

5. 5. The electronic device according to claim 4, The first surface member is provided with a keyboard, The fixing piece is positioned so as not to overlap the keyboard in a plan view but to overlap the keyboard in a side view.

1. An electronic device comprising:

6. 2. The electronic device according to claim 1, The first side wall and the second side wall are inclined so as to approach each other toward a side away from the first panel.

1. An electronic device comprising:

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