JP2023030531A - Electronic apparatus and mounting method for electronic apparatus - Google Patents

Abstract

To provide an electronic apparatus capable of electrically connecting circuit boards with each other in a state where a flat cable is held in any shape.SOLUTION: An electronic apparatus according to an embodiment comprises: a first board including a first principal surface, a second principal surface positioned oppositely to the first principal surface and a first connector provided on the first principal surface; a second board including a third principal surface opposed to the second principal surface while providing a gap therebetween and a second connector; a flexible cable including a first end connected to the first connector, a second end connected to the second connector and a bent part bent from the second end through the outside of the first board and extending to the first end; and a holding film formed from a flexible film of which the elastic force is smaller than that of the cable, including a first fixed part fixed at the side of the first principal surface of the first board, a second fixed part fixed to the second board, and a pressing part extending from the second fixed part through the outside of the bent part to the first fixed part and pressing the bent part toward a first side edge.SELECTED DRAWING: Figure 4

Description

TECHNICAL FIELD Embodiments of the present invention relate to an electronic device and an electronic device mounting method.

Generally, an electronic device has a housing, a plurality of circuit boards arranged in the housing, and a large number of electronic components mounted on each circuit board. Of the plurality of circuit boards, two circuit boards that face each other are electrically connected via a flexible flat cable installed in a curved state.

Due to the elastic force or restoring force of the flat cable, the joint between the flat cable and the circuit board may peel off. Therefore, for example, a technique has been proposed in which a holder formed of a metal plate is attached to the flat cable, and the holder holds the flat cable in a curved state.

Japanese Utility Model Publication No. 62-123688 Japanese Patent Publication No. 61-111595 JP-A-2001-331122

An object of the present embodiment is to provide an electronic device and a mounting method of the electronic device that can electrically connect circuit boards while holding a flat cable in an arbitrary shape.

An electronic device according to one embodiment includes a first main surface, a second main surface opposite to the first main surface, a first side edge, and the first main surface near the first side edge. a first connector provided on a first substrate; a third main surface facing the second main surface with a gap therebetween; a fourth main surface located opposite to the third main surface; a second substrate having a second side edge facing the first side edge and a second connector provided near the second side edge; and a first end connected to the first connector. a second end connected to the second connector; a curved portion extending from the second end through the outside of the first side edge of the first substrate to the first end; a first fixing portion formed of a flexible cable having an elastic force smaller than that of the cable and fixed to the first main surface side of the first substrate; and fixed to the second substrate and a pressing portion extending from the second fixing portion to the first fixing portion through the outside of the curved portion and pressing the curved portion toward the first side edge. and a retaining film having a.
In addition, the method for mounting an electronic device according to one embodiment includes a first main surface, a second main surface opposite to the first main surface, a first side edge, and near the first side edge. a first connector provided on the first main surface; a third main surface facing the second main surface with a gap therebetween; and a third main surface opposite to the third main surface. a second substrate having four main surfaces, a second side edge facing the first side edge, and a second connector provided near the second side edge; and connected to the first connector. A flexible flexible having a first end and a second end connected to the second connector and capable of bending from the second end past the outside of the first side edge of the first substrate. A flexible film having an elastic force smaller than that of the cable is fixed to the second substrate, and the cable is pressed from the outside toward the first side edge. The cable is curved by deforming the film, and the film is fixed to the first main surface side of the first substrate.

FIG. 1 is a perspective view showing an example of the appearance of an electronic device according to a first embodiment. FIG. 2 is a perspective view of the mobile PC showing the internal structure inside the housing. 3 is a cross-sectional view of the mobile PC along line III-III of FIG. 2. FIG. FIG. 4 is a perspective view showing the system circuit board, the antenna control circuit board, and the connecting portion. FIG. 5 is a side view of the system circuit board, the antenna control circuit board, and the connecting portion viewed from the direction of arrow V in FIG. 6 is a cross-sectional view of the connection along line VI-VI of FIG. 4; FIG. 7 is a cross-sectional view showing an enlarged area A of FIG. 6. FIG. FIG. 8 is a perspective view showing an antenna control circuit board and a holding film. FIG. 9 is a perspective view showing a state after the second flat cable is connected to the second connector; FIG. 10 is a side view of the system circuit board, the antenna control circuit board, and the connection section viewed from the direction of arrow X in FIG. 11 is a perspective view showing an example when the holding film is moved from the state of FIG. 9. FIG. FIG. 12 is a side view of the system circuit board, the antenna control circuit board, and the connecting portion viewed from the direction of arrow XII in FIG. FIG. 13 is a cross-sectional view showing the electronic device with the holding film fixed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
It should be noted that the disclosure is merely an example, and those that a person skilled in the art can easily conceive of appropriate modifications while maintaining the spirit of the invention are, of course, included in the scope of the present invention. In addition, in order to clarify the drawings and explanations, the width, thickness, shape, etc. of each part may be schematically represented compared to the actual mode, but this is only an example, and the interpretation of the present invention is not intended. It is not limited. In addition, in this specification and each figure, the same reference numerals may be given to the same elements as those described above with respect to the existing figures, and detailed description thereof may be omitted as appropriate.

(First embodiment)
A first embodiment will be described. FIG. 1 is a perspective view showing an example of the appearance of the electronic device according to the first embodiment.
In this embodiment, a mobile edge computing device (hereinafter referred to as a mobile PC) 10 is shown as an example of electronic equipment.

The mobile PC 10 has, for example, a flat rectangular housing 12 . The housing 12 includes a rectangular first main wall 12a, a rectangular second main wall 12b (not shown) opposed to the first main wall 12a with a space therebetween, and peripheral edges of the first main wall 12a and the second main wall 12b. It has four side walls (a pair of long side walls 12c and a pair of short side walls 12d) erected along the . The size of the housing 12 is, for example, 10 cm or less in width, 20 cm or less in height, and 2 cm in thickness.

A plurality of operation buttons 14 and a fingerprint sensor 16 are provided on one end portion of the first main wall 12a. The operation buttons 14 include, for example, an up button 14a, a right button 14b, a down button 14c, and a left button 14d arranged in a circle, and an enter button (also referred to as a center button or an enter button) 14e provided at the center of these buttons. , contains The fingerprint sensor 16 is used for user authentication when logging into the mobile PC 10 .

A USB 3.0 standard connector 18, a USB type-C standard connector 20, a main switch 22, and a pin jack 24 are provided on one short side wall 12d. An intake hole 26a and an exhaust hole 26b for cooling, which will be described later, are provided in the central portion in the longitudinal direction of the long side wall 12c.

FIG. 2 is a perspective view of the mobile PC 10 showing the internal structure inside the housing 12. As shown in FIG.
The internal configuration of the housing 12 will be schematically described with reference to FIG.
The mobile PC 10 includes a plurality of circuit boards installed inside the housing 12, a plurality of electronic components mounted on each circuit board, an LTE antenna 50 provided on the inner surface of the side wall of the housing 12, and a and a battery accommodating portion 52 in which a battery is mounted.

In one example, the plurality of circuit boards includes a key control circuit board (not shown) arranged on the inner surface of the first main wall 12a and connected to the operation buttons 14, and an LTE antenna arranged on the inner surface of the first main wall 12a. An antenna control circuit board 46, which will be described later, is connected to 50, and a system circuit board 40 is arranged so as to overlap and face the key control circuit board and the antenna control circuit board 46 with a space therebetween. The system circuit board 40 has a second main surface opposite to the first main surface 40a and four side edges including a first side edge 40c. The system circuit board 40 has a second main surface 40b facing the key control circuit board and the antenna control circuit board 46, and three side edges facing the pair of long side walls 12c and one of the short side walls 12d. , are arranged in the housing 12 . The first side edge 40c faces one of the long side walls 12c substantially parallel with a predetermined gap.

A plurality of electronic components are mounted on each of the plurality of circuit boards. For example, a plurality of electronic components 41, a connector 43 for battery connection, a cooling fan 44, a cooling unit 45, and the like are mounted on the upper surface (first main surface 40a) of the system circuit board 40. FIG. The cooling unit 45 has radiation fins 45a arranged between the outlet of the cooling fan 44 and the exhaust holes 26b of the housing 12, and heat pipes 45b connected to the radiation fins.

A plurality of circuit boards are electrically connected to each other by a flexible flat cable, which is an example of a cable. For example, the key control circuit board and system circuit board 40 are electrically connected via a flexible first flat cable 54 . The first flat cable 54 has one end connected to a connector installed on the key control circuit board and the other end connected to a connector installed on the system circuit board 40. It extends outside the side edges of the circuit board 40 and over the system circuit board 40 to the other end. The first flat cable 54 has a bent portion 54a bent above the system circuit board 40 and parallel to the surface of the board. The width of the first flat cable 54 is, for example, about 8 mm.

The antenna control circuit board 46 and the system circuit board 40 are electrically connected via a flexible second flat cable 56 . A connection structure between the antenna control circuit board 46 and the system circuit board 40 will be described later.

A plurality of intake holes 26a are formed in the other long side wall 12c of the housing 12. As shown in FIG. A plurality of air intake holes 26a are provided side by side from substantially the central portion in the longitudinal direction of the long side wall 12c to the vicinity of one of the short side walls 12d. In addition, these air intake holes 26a are positioned to face the system circuit board 40 and an antenna control circuit board 46, which will be described later.
By operating the cooling fan 44 described above, outside air is drawn into the housing 12 through the air intake hole 26a, flows around the circuit board, is drawn into the cooling fan 44, and is discharged from the outlet port of the cooling fan 44 to the radiating fins. The air is exhausted to the outside through 45a and exhaust hole 26b. In this manner, the outside air cools the inside of the housing 12 and the circuit board. Also, an electronic component such as a CPU (not shown) is cooled via the radiation fins 45a and the heat pipes 45b.

The mobile PC 10 further includes a cushioning member 58 provided in a region between the second flat cable 56 and the LTE antenna 50 provided on the inner surface of the long side wall 12c. The cushioning member 58 is arranged between the intake hole 26 a and the battery housing portion 52 . The material of the cushioning member 58 is, for example, an elastic material such as rubber or sponge. By providing the buffer member 58, the distance between the LTE antenna 50 and the second flat cable 56 can be maintained, and the effect of preventing noise from entering the LTE antenna 50 from the second flat cable can be obtained. . In addition, the buffer member 58 has a function of shielding the outside air from the air intake hole 26 a toward the battery housing portion 52 . This makes it possible to efficiently use the taken outside air for cooling the electronic components.

Next, the connection structure between the system circuit board 40 and the antenna control circuit board 46 will be described in detail. FIG. 3 is a cross-sectional view of mobile PC 10 along line III-III of FIG. FIG. 4 is a perspective view showing the system circuit board 40, the antenna control circuit board 46, and the connection section. FIG. 5 is a side view of the system circuit board 40, the antenna control circuit board 46, and the connecting portion viewed from the direction of arrow V in FIG.
As shown in FIGS. 3 and 4, the system circuit board 40 has a substantially rectangular first main surface 40a, a second main surface 40b opposite to the first main surface 40a, and first side edges 40c. and four side edges. The system circuit board 40 is arranged in the housing 12 in a state in which the first side edge 40c faces the long side wall 12c of the housing 12 in a substantially parallel manner with a gap therebetween.

A plurality of electronic components are mounted on the first main surface 40 a and the second main surface 40 b of the system circuit board 40 . In one example, a first connector 42 is mounted on the first major surface 40a near the first side edge 40c. Furthermore, a cooling fan 44 is mounted on the first main surface 40a. The cooling fan 44 is connected to the first main surface 40a by tightening screws. The system circuit board 40 has a rectangular notch 62 formed in the first side edge 40 c near the first connector 42 . The notch 62 has a width and depth that can accommodate the second flat cable 56 .

The antenna control circuit board 46 has a third main surface 46a facing the second main surface 40b of the system circuit board 40 with a gap therebetween, a fourth main surface 46b opposite to the third main surface 46a, and a first main surface 46b. It has a second side edge 46c facing the side edge 40c and a second connector 48 provided on the third main surface 46a near the second side edge 46c. The antenna control circuit board 46 is arranged such that the fourth main surface 46b faces the first main wall 12a of the housing 12, and the second side edge 46c faces the long side wall 12c with a gap therebetween substantially in parallel. It is

The system circuit board 40 and the antenna control circuit board 46 are substantially parallel to each other. A direction perpendicular to the X direction is defined as the Y direction. However, the system circuit board 40 and the antenna control circuit board 46 do not necessarily have to be parallel.

For the second flat cable 56, for example, a flexible strip-shaped flat cable (FFC) having a width W1 of approximately 17 mm is used. As shown in FIGS. 3-5, the second flat cable 56 has a first end 56a connected to the first connector 42, a second end 56b connected to the second connector 48, and a second end 56b connected to the second connector 48. and a curved portion 56c that curves from the portion 56b through the outside of the first side edge 40c of the system circuit board 40 and extends to the first end portion 56a.
The second flat cable 56 is formed by laminating an insulating layer, a conductive layer, and an insulating cover layer, for example. An elastic force (restoring force) is generated in the second flat cable 56 to restore the curved portion 56c to a flat state.

The mobile PC 10 has a holding film 64 that holds the second flat cable 56 formed into a desired shape. The holding film 64 is made of a flexible film having a smaller elastic force than the second flat cable 56, such as a resin film. The film referred to here means a thin film having a thickness of 0.1 mm or less. In other words, the thickness of the holding film 64 is 0.1 mm or less.

The holding film 64 includes a first fixing portion 64a fixed to the first main surface 40a side of the system circuit board 40, a second fixing portion 64b fixed to the fourth main surface 46b of the antenna control circuit board 46, A strip-shaped pressing portion 64c extending from the first fixing portion 64a to the second fixing portion 64b through the outside of the curved portion 56c of the second flat cable 56 is integrally provided. The pressing portion 64c contacts the outer surface side of the curved portion 56c of the second flat cable 56 and presses the curved portion 56c toward the first side edge 40c to form a desired curved shape.
In this embodiment, the curved portion 56c of the second flat cable 56 is formed such that the curved portion 56c and the pressing portion 64c are positioned within the notch 62 beyond the first side edge 40c of the system circuit board 40. there is

The holding film 64 can be made of an electrically insulating material. In one example, the holding film 64 is made of an insulating synthetic resin.
The holding film 64 bends the holding film 64 itself while bending the second flat cable 56 , so that the second flat cable 56 can be deformed to fit in a desired space. In addition, since the elastic force of the holding film 64 is smaller than that of the second flat cable 56, even if the second flat cable 56 is deformed by the holding film 64, the second flat cable 56 will not be damaged. Careless breakage of the second flat cable 56 can be avoided. In addition, the holding film 64 prevents the first fixing portion 64a or the second fixing portion 64b from peeling off due to the elastic force of the holding film 64 and the second flat cable 56. It is made of a material that generates an elastic force smaller than the force).

The width W2 of the pressing portion 64c of the holding film 64 is preferably 60% or more of the width W1 of the curved portion 56c of the second flat cable 56. As shown in FIG. By setting the ratio to 60% or more, the pressing portion 64c can stably press the curved portion 56c, and the pressing portion 64c can be given strength to the extent that it does not break due to the reaction force received from the curved portion 56c. When the curved portion 56c and the pressing portion 64c are arranged in the notch 62 of the system circuit board 40, the width W2 of the pressing portion 64c is set to a width W2 smaller than the width of the notch 62. FIG.
In this embodiment, the width is W2≈W1, and the pressing portion 64c is in contact with the entire surface of the curved portion 56c in the width direction.

In one example, the first fixing portion 64a is fixed to the case of the cooling fan 44 on the side of the first main surface 40a. However, the fixing position of the first fixing portion 64a is not limited to the cooling fan 44, and can be fixed to the first main surface 40a, for example. The first fixing portion 64a and the second fixing portion 64b are fixed by, for example, double-sided tape, adhesive, or the like.

Details of the second flat cable 56 and the holding film 64 will be described.
6 is a cross-sectional view of the connection along line VI-VI of FIG. 4; FIG. 7 is a cross-sectional view showing an enlarged area A of FIG. 6. FIG.
As illustrated, the second flat cable 56 includes a first insulating layer 56d, a conductive layer 56f laminated on the first insulating layer 56d, and a second insulating layer laminated on the first insulating layer 56d and the conductive layer 56f. 56e and . The conductive layer 56f forms a plurality of patterned wirings (cables). The first insulating layer 56d and the second insulating layer 56e are made of an electrically insulating material such as a resin such as polyimide. The conductive layer 56f is made of copper foil, for example. Note that the first insulating layer 56d, the second insulating layer 56e, and the conductive layer 56f may each be made of another material.

The second flat cable 56 further has a shield layer 68a laminated on the first insulating layer 56d and a shield layer 68b laminated on the second insulating layer 56e. The shield layers 68a and 68b are provided in regions of the second flat cable 56 excluding the first end 56a and the second end 56b. The shield layers 68a and 68b are electromagnetic interference prevention shields that block electromagnetic waves.

The pressing portion 64c of the holding film 64 is in contact with the shield layer 68b.
A reinforcing plate 66 is provided on each of the upper surface of the first end portion 56 a and the upper surface of the second end portion 56 b of the second flat cable 56 . The reinforcing plate 66 extends over the upper surface of the first end portion 56a and the upper surface of the second end portion 56b. The reinforcing plate 66 is made of an electrically insulating material such as a resin material. By providing the reinforcing plate 66, it is possible to suppress the bending of the first end portion 56a and the second end portion 56b, and to insert them into the first connector 42 and the second connector 48, respectively.

FIG. 8 is a perspective view showing the antenna control circuit board 46 and the holding film 64. As shown in FIG.
As shown in FIG. 8, the second fixing portion 64b of the holding film 64 is fixed to the fourth main surface 46b of the antenna control circuit board 46 and covers substantially the entire fourth main surface 46b. The holding film 64 has a belt-like extension 64d extending from the second fixing portion 64b in the direction opposite to the pressing portion 64c.

As shown in FIG. 3 , the antenna control circuit board 46 is installed overlapping the inner surface of the first main wall 12 a of the housing 12 . The second fixing portion 64b of the holding film 64 is located between the antenna control circuit board 46 and the first main wall 12a. Since the holding film 64 is made of an electrically insulating material, it electrically insulates the antenna control circuit board 46 and the housing 12 from each other. The extending portion 64d is located between the LTE module 60 and the first main wall 12a and electrically insulates the LTE module 60 and the housing 12 from each other. However, the extending direction of the extending portion 64d is not limited to the illustrated direction. For example, it may be the X direction and a direction orthogonal to the illustrated direction.

As shown in FIG. 3, the curved portion 56c of the second flat cable 56 formed and held in a desired shape by the holding film 64 faces the long side wall 12c of the housing 12 and the LTE antenna 50 with a gap therebetween. are doing. In this embodiment, the curved portion 56c and the pressing portion 64c are pushed into the notch 62 of the system circuit board 40 and arranged. Thereby, the distance between the second flat cable 56 and the LTE antenna 50 can be increased. As described above, the cushioning member 58 is arranged between the curved portion 56c and the long side wall 12c and the LTE antenna 50, and is in contact with 54c via the holding film 64. As shown in FIG. The cushioning member 58 suppresses deformation of the curved portion 56 c and the pressing portion 64 c and holds the curved portion 56 c and the pressing portion 64 c at desired positions away from the LTE antenna 50 .

(Flat cable mounting method)
Next, the process of connecting the system circuit board 40 and the antenna control circuit board 46 and the process of forming and holding the second flat cable 56 will be described.

9 to 13 are perspective views and side views showing each step.
As shown in FIGS. 9 and 10, first, the system circuit board 40 and the antenna control circuit board 46 are arranged facing each other, and the second end 56b of the second flat cable 56 is attached to the antenna control circuit board 46. It connects to the second connector 48 and connects the first end 56 a to the first connector 42 of the system circuit board 40 . The second flat cable 56 bends and extends outside the first side edge 40 c of the system circuit board 40 . The holding film 64 is fixed to the fourth main surface 46b of the antenna control circuit board 46 only at the second fixing portion 64b, and the pressing portion 64c and the first fixing portion 64a are movable in the X direction or the Y direction.
Note that the system circuit board 40 and the antenna control circuit board 46 may be arranged to face each other after the second flat cable 56 is connected to the first connector 42 and the second connector 48 in advance.

Next, as shown in FIGS. 11 and 12, the pressing portion 64c and the first fixing portion 64a of the holding film 64 are pulled up along the curved portion 56c of the second flat cable 56 toward the system circuit board 40, and the pressing portion 64c is lifted. is pressed against the outer surface of the curved portion 56c, and the portion corresponding to the curved portion 56c of the second flat cable 56 is pressed toward the first side edge 40c. As a result, a portion of the curved portion 56c that is deformed and formed in a direction approaching the first side edge 40c is formed. In this embodiment, the bending portion 56c is pressed until the bending portion 56c and the pressing portion 64c move into the notch 62 . If the notch 62 is not provided, the curved portion 56c may be pressed against the first side edge 40c.
Subsequently, while pressing the curved portion 56c, the first fixing portion 64a is pulled down toward the first main surface 40a of the system circuit board 40, and fixed to the case of the cooling fan 44 as shown in FIG. As a result, the curved portion 56c of the second flat cable 56 is formed, and is pushed into the same height as the first fixing portion 64a by the pressing portion 64c of the holding film 64, forming the curved portion 56c into a desired shape. It is formed. The second flat cable 56 is held in a desired shape by the holding film 64 .

According to the first embodiment configured as described above, it is possible to obtain an electronic device in which the circuit boards can be electrically connected while the second flat cable 56 is held in an arbitrary shape.
In this embodiment, by holding the second flat cable 56 in a desired shape, a sufficient distance can be secured between the second flat cable 56 and the LTE antenna 50, and the distance from the second flat cable 56 to the LTE antenna 50 can be sufficiently secured. It is possible to prevent noise from entering the By providing a notch 63 in the first side edge 40c of the system circuit board 40 and arranging the second flat cable 56 in this notch 62, the distance between the second flat cable 56 and the LTE antenna 50 is further widened. can do. Furthermore, according to the present embodiment, since the shield layers 68a and 68b are provided on the surface of the second flat cable 56, it is possible to more reliably prevent noise transmission. According to the embodiment, a buffer member 58 is arranged between the second flat cable 56 and the holding film 64 and the long side wall 12c (LTE antenna 50), and the buffer member 58 displaces and deforms the second flat cable 56. is regulated. Thereby, the space between the second flat cable 56 and the LTE antenna 50 can be secured even more reliably.

While embodiments of the invention have been described, the embodiments have been presented by way of example and are not intended to limit the scope of the invention. The novel embodiments can be embodied in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. Embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof. It is also possible to combine multiple embodiments as needed.
For example, a connection structure having a flat cable and a holding film can be provided not only for connection between a system circuit board and an antenna control circuit board, but also for connection between two circuit boards arranged opposite to each other. The materials for forming the flat cable and the holding film are not limited to the above-described embodiments, and various modifications are possible. The shape and dimensions of the flat cable and holding film are not limited to the above-described embodiments, and can be changed as appropriate. The cushioning member 58 may be omitted.

DESCRIPTION OF SYMBOLS 10... Mobile PC, 12... Case, 12a... 1st main wall, 12b... 2nd main wall, 12c... Long side wall, 12d... Short side wall, 26a... Inlet, 26b... Exhaust hole, 40... System circuit Substrate 40a First main surface 40b Second main surface 40c First side edge 42 First connector 44 Cooling fan 46 Antenna control circuit board 46a Third main surface 46b Fourth main surface 46c Second side edge 48 Second connector 56 Second flat cable 56a First end 56b Second end 56c First insulating layer 56d Second Insulating layer 56e Conductive layer 58 Cushioning member 60 LTE module 62 Notch 64 Holding film 64a First fixing part 64b Second fixing part 64c Pressing part 64d Extension Outer portion 66 Reinforcement plate 68a, 68b Shield layer W1, W2 Width

Claims (8)

a first major surface, a second major surface opposite the first major surface, a first side edge, and a first connector provided on the first major surface near the first side edge; a first substrate having
a third main surface facing the second main surface with a gap therebetween; a fourth main surface opposite to the third main surface; a second side edge facing the first side edge; a second substrate having a second connector provided near two side edges;
a first end connected to the first connector; a second end connected to the second connector; a flexible cable having a bend extending to the first end;
A first fixing portion formed of a flexible film having an elastic force smaller than that of the cable and fixed to the first main surface side of the first substrate, and a second fixing portion fixed to the second substrate. a pressing portion extending from the second fixing portion to the first fixing portion through the outside of the curved portion and pressing the curved portion toward the first side edge; comprising
Electronics. The material of the holding film is made of resin,
The electronic device according to claim 1. A housing having a first main wall provided with the first substrate and a side wall facing the first side edge with a gap therebetween, an antenna provided on an inner surface of the side wall, the antenna and the holding film. and a buffer member disposed between
The electronic device according to claim 1 or 2. The cable has an insulating layer, a conductive layer, and a shield layer,
The electronic device according to any one of claims 1 to 3. The first substrate has a notch formed in the first side edge,
The cable is housed inside the notch,
The electronic device according to any one of claims 1 to 4. The holding film has an extension portion extending outward from the second fixing portion,
The electronic device according to any one of claims 1 to 5. The first fixing portion of the holding film is fixed to a component mounted on the first main surface of the first substrate,
The electronic device according to any one of claims 1 to 6. a first major surface, a second major surface opposite the first major surface, a first side edge, and a first connector provided on the first major surface near the first side edge; a first substrate having
a third main surface facing the second main surface with a gap therebetween; a fourth main surface opposite to the third main surface; a second side edge facing the first side edge; a second substrate having a second connector provided near two side edges;
a first end connected to the first connector and a second end connected to the second connector, and extending from the second end outside the first side edge of the first substrate; In an electronic device comprising a flexible cable that can be bent by
fixing a flexible film having an elastic force smaller than that of the cable to the second substrate;
bending the cable by deforming the film so as to press the cable from the outside toward the first side edge;
A mounting method for an electronic device, wherein the cable is mounted by fixing the film to the first main surface side of the first substrate.

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