JP2008113217A - Electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide electronic equipment capable of suppressing the influence of static electricity to a circuit board without changing designs in a development stage and a mass production stage. <P>SOLUTION: The electronic equipment is provided with a rear case 61, the circuit board 101 housed inside the rear case 61, and a testing terminal 102 disposed on a substrate, wherein the rear case 61 has an opening forming part 106 for forming an opening 109 at a part in the rear case 61, facing the testing terminal 102. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electronic device having a test terminal.

On a substrate of an electronic device such as a mobile phone, for example, a test terminal for testing an electrical characteristic of a control circuit in the electronic device is installed. In addition, since the test may be performed from outside the electronic device even after the electronic device is assembled, the test terminal is preferably installed in a place where the test is easily performed.
However, since the test terminal is generally connected to a CPU or the like, static electricity that enters the substrate via the test terminal adversely affects electronic devices such as the CPU when installed in a place where it can be easily touched by human hands. There is a risk of giving.

  As shown in FIG. 9, when the large opening 2 is formed in the housing 1 and the test terminal 4 mounted on the substrate 3 is exposed from the opening 2, the user uses it. Sometimes, a user's finger or the like touches the test terminal 4, and an electronic component such as a CPU (not shown) mounted on the substrate 3 may be affected by static electricity.

  As another method for preventing the influence of static electricity as shown in FIG. 10, a covering member 6 such as a seal is used to close the opening 2 so that the user does not touch the test terminal 4 directly. There is a method to put on.

In addition, as shown in FIG. 11, the substrate 3 with the protruding portion 7 with the test terminal 4 protruding from the substrate 3 is produced in the development stage, and the substrate 3 from which the protruding portion 7 is removed in the mass production stage. There is a method of changing the configuration.
Japanese Patent Laid-Open No. 08-19033

  However, if a seal is applied to the large opening 2 as in the configuration shown in FIG. 10, the seal may bend at the opening 2 and the appearance may be impaired. Further, there is a drawback that the opening 2 cannot be properly covered by the deflection of the seal.

  Further, although there is no possibility that the electronic component mounted on the board 3 is affected by static electricity, it takes time and cost to change the design of the circuit wiring on the board 3. As for the housing 1, an opening formed in the housing 1 is formed by notching a portion where the protruding portion 7 protrudes outside the housing 1 and notching the protruding portion 7 protruding outside the housing 1 during mass production. It takes time and money to fix it. Thus, in the case of the configuration shown in FIG. 11, time and expense are required for design modification in the process of shifting from the development stage to the mass production stage.

  Further, a connecting portion between the protruding portion 7 formed on the substrate 3 and the substrate 3 is formed by a perforation or the like, and the protruding portion 7 can be easily cut off from the substrate 3 by applying a force to the protruding portion 7. There is also a method of mass production as a substrate 3 having the same shape as in the development stage, but in this method, the substrate 3 of the protruding portion 7 is wasted, and the number of substrates 3 taken by the protruding portion 7 may be sacrificed, resulting in an increase in cost. There is.

  Therefore, an object of the present invention is to provide an electronic device that can suppress the influence of static electricity on a circuit board without changing the design between a development stage and a mass production stage.

  The electronic apparatus according to the present invention includes a housing, a circuit board housed in the housing, and a test terminal disposed on the circuit board, and the housing faces the test terminal. An opening forming portion that is located at a site and capable of forming an opening, the opening forming portion is located at a site facing the test terminal of the housing, and the facing portion that defines the opening; A connecting portion that connects the facing portion and the housing, is cut or bent by application of force to the facing portion, and is provided on an outer peripheral portion of the facing portion except for the connecting portion; And a separation part separating the casing.

  ADVANTAGE OF THE INVENTION According to this invention, the electronic device which can suppress the influence of the static electricity with respect to a circuit board can be provided, without changing a design in a development stage and a mass production stage.

  Hereinafter, a mobile phone will be described as an example of the electronic apparatus according to the present embodiment with reference to the drawings.

FIG. 1 is a perspective view showing an external appearance of a mobile phone 50 incorporating an electronic apparatus according to this embodiment of the present invention.
The cellular phone 50 is configured as a so-called foldable cellular phone, and includes a first casing 51 and a second casing 52 that are rotatably connected to each other between an open state and a closed state.

  The first casing 51 and the second casing 52 are configured to form a casing of the entire mobile phone 50 by connecting the end portions of the first casing 51 and the second casing 52 by a connecting portion 53 that is the center of rotation. The first casing 51 and the second casing 52 are each formed in a generally thin rectangular parallelepiped shape, and are overlapped with each other in the closed state so that their outlines substantially coincide with each other.

  The first casing 51 is provided with, for example, a speaker for call 56 and a display unit 54 for displaying images and characters. The second housing 52 is provided with, for example, a microphone 57 for calling, a built-in antenna 63 for transmission / reception for performing wireless communication using radio waves (see FIG. 2), and an operation unit 55 for receiving user operations. Yes.

  The speaker 56 is housed in the end of the first housing 51 opposite to the connecting portion 53, in other words, the end of the housing of the entire mobile phone 50. The microphone 57 and the built-in antenna 63 are housed in the end of the second housing 52 opposite to the connecting portion 53, in other words, the end of the housing of the entire mobile phone 50.

  FIG. 2 is an exploded perspective view of the second housing 52 illustrated in FIG. However, in FIG. 2, some members such as a key sheet, a flexible printed wiring board, a battery, a covering member, a shield case, and a memory slot are omitted.

  The second casing 52 includes a front case 60 on the side facing the first casing 51 in the closed state, a rear case 61 on the rear side, and a lid 62 covering the rear side of the rear case 61. ing. The front case 60, the rear case 61, and the lid 62 are each formed of, for example, a nonconductive synthetic resin. For example, the front case 60 and the rear case 61 are coupled by screwing a screw inserted through the rear case 61 into a screw boss 64 provided in the front case 60.

  Between the front case 60 and the rear case 61, the first mounting surface S1 on the front case 60 side and the second mounting surface S2 on the rear case 61 side (hereinafter simply referred to as “mounting surface S”) The circuit board 101 having the same may be arranged. The circuit board 101 is composed of, for example, a printed wiring board based on synthetic resin.

The circuit board 101 is positioned in the second housing 52 in the direction along the mounting surface S by contacting the screw boss 64 of the front case 60, for example. The circuit board 101 is sandwiched between the front case 60 and the rear case 61 directly or indirectly with a shield case or the like interposed therebetween, for example, in a direction orthogonal to the mounting surface S. The positioning is performed in the second casing 52.
The circuit board 101 includes test terminals 102 on the mounting surfaces S1 and S2, a ground (not shown) directly disposed on the circuit board 101 (hereinafter also referred to as a solid ground), a shield case, a memory slot, and various electronic components. It is mounted and arranged.

  The rear case 61 is configured by forming a battery storage portion 110 in which a battery 112 (to be described later) is stored on the back side (upper side shown in FIG. 2).

  The built-in antenna 63 includes, for example, a synthetic resin base 63a, a conductive pattern 63b stretched around the synthetic resin base, and a connection terminal (not shown) that connects the conductive pattern 63b and the circuit board 101. Yes. The built-in antenna 63 is constituted by a grounded antenna, for example, and is connected to a transmitter and a receiver (not shown) and is also connected to a reference potential layer (not shown) of the circuit board 101.

  A component holding portion 65 for positioning the microphone 57 is formed inside the housing of the front case 60. The component holding part 65 includes, for example, a rib that forms a recess into which the microphone 57 is inserted. The microphone 57 is fixed by being sandwiched between the front case 60 and the first mounting surface S <b> 1 of the circuit board 101 with a sound collecting surface (not shown) facing the inner surface of the front case 60.

  FIG. 3 is a view showing the electronic device 100 in the mobile phone 50 as an embodiment of the present invention. FIG. 3 (a) is a plan view at a position facing the battery storage portion 110, and FIG. The AA sectional view in Drawing 3 (a) is shown.

As shown in FIGS. 3A and 3B, the mobile phone 50 as the electronic apparatus 100 includes a rear case 61 and a circuit board 101 disposed so as to be covered with the rear case 61.
The rear case 61 has a battery housing portion 110 that is recessed inward with respect to a flat surface portion (upper surface portion shown in FIG. 2) and a lid body 62 that covers the battery housing portion 110.
The rear case 61 is configured such that the battery housing part 110 is exposed when the lid 62 is removed. A battery 112 is stored in the battery storage unit 110.
The battery housing part 110 is made of the same material as that of the rear case 61, and is made of, for example, a plastic resin and is integrally formed with the rear case 61. The rear case 61 includes an opening forming portion 106 on the bottom surface of the battery housing portion 110.

The circuit board 101 includes a test terminal 102, a solid ground 103, a shield (not shown), and a removable memory slot. The circuit board 101 is formed using, for example, paper phenol which is an organic material, glass cloth epoxy, paper epoxy, composite, polyimide film, metal materials such as aluminum, iron, copper, inorganic materials such as aluminum oxide and ceramics. .
The circuit board 101 incorporates a circuit element or a printed wiring to form an integrated circuit or the like.
The test terminal 102 is a terminal for testing the electrical characteristics of the control circuit from the outside of the electronic device 100. The test terminal 102 is mounted on a portion of the circuit board 101 that faces the opening forming portion 106.
The solid ground 103 is formed in a predetermined pattern on the peripheral edge of the surface of the circuit board 101.

Hereinafter, the configuration of the mobile phone 50 as an example of the electronic device 100 in FIG. 3 with the lid 62 and the battery 112 removed will be described with reference to the drawings.
FIG. 4 is a diagram showing a configuration in a state in which the lid 62 and the battery 112 are removed. FIG. 4 (a) is a plan view of the battery storage unit 110, and FIG. BB sectional drawing is shown.

As shown in FIGS. 2 to 4, the rear case 61 has a battery housing portion 110 that is recessed inward, and an opening forming portion 106 is formed on the bottom surface of the battery housing portion 110.
The opening forming part 106 includes a facing part 106a, a separating part 106b, and a connecting part 106c.
The facing portion 106a has, for example, a rectangular shape, and when the circuit board 101 is assembled in the second housing 52, the facing portion 106a faces the test terminal 102 disposed on the second mounting surface S2 of the circuit board 101. It is formed at the part of case 61. The facing portion 106a is configured integrally with a rear case 61 that constitutes the second housing.
Further, a separation portion 106b is formed on the outer peripheral portion other than one end side (the right side shown in FIG. 4) of the facing portion 106a so that the facing portion 106a can be easily separated from the rear case 61. Moreover, the opposing part 106a is comprised integrally with the rear case 61 via the connection part 106c formed in one end side, and is supported by the rear case 61 by the said connection part 106c.
That is, the facing portion 106 a and the connecting portion 106 c are integrally formed with the rear case 61 at the bottom surface portion of the battery storage portion 110.

For example, the separation part 106b is configured by a rectangular-shaped slit (hereinafter also referred to as a plane U-shape or a U-shape) in which a part of one side is closed on the outer peripheral part of the facing part 106a. Due to the separation part 106b, a gap is formed between the facing part 106a and the rear case 61 in the three directions of the outer periphery.
The connecting portion 106c is formed on the side of the outer peripheral portion of the facing portion 106a where the separating portion 106b is not formed, and connects the facing portion 106a and the rear case 61. For example, the connecting portion 106c is formed on one end side in the outer peripheral portion of the facing portion 106a.

  As shown in FIGS. 4A and 4B, the test terminal 102 faces the facing portion 106 a in the opening forming portion 106 of the rear case 61 when the circuit board 101 is assembled in the second housing 52. It is mounted on the circuit board 101 of the part to be. In other words, the test terminal 102 is mounted on the second mounting surface S2 of the circuit board 101 at a portion facing an opening 109 described later formed by separating the facing portion 106a from the rear case 61. Further, the second mounting surface S2 is configured so as not to be mounted on the part facing the separation part 106b, and the test terminal 102 is not visible from the separation part 106b in a plan view shown in FIG. Implemented.

  A portion of the second mounting surface S2 of the circuit board 101 facing the separation portion 106b has a solid ground 103, a shield 104 to be described later mounted on the circuit board 101, or a ground in a top plate 105a of a removable memory slot 105 to be described later. Parts are arranged.

  As described above, the ground portion of the circuit board 101 (the solid ground 103, the shield 104, and the ground portion of the top plate 105a of the removable memory slot 105) is disposed at a position facing the separation portion 106b. For this reason, even if an electrostatic discharge occurs due to the user touching the separation unit 106b, the discharge current does not flow to the electronic component mounted on the circuit board 101 inside the housing, but the current flows to the ground portion. The influence which the electronic component mounted in the board | substrate 101 receives by static electricity can be suppressed.

  In addition, the test terminal 102 is connected to an electronic component such as a CPU mounted on the circuit board 101, and static electricity applied to the test terminal 102 may adversely affect other electronic components. For this reason, normally, anti-static components are mounted on the wiring of the test terminal 102. However, in the case of the embodiment of the present invention, the application of static electricity countermeasure components to the circuit board 101 is reduced because static electricity is suppressed from being applied to the test terminals 102. Therefore, the circuit board 101 can be downsized.

  In addition, although it is a structure including a slit as the separating portion 106b, the present invention is not limited to this, and for example, in order to separate the facing portion from the casing by applying a force to the facing portion 106a, It may be constituted by a groove so that the wall thickness becomes thin, or may be constituted by a perforation like a row of fine holes.

5A and 5B are diagrams showing the circuit board 101 and the rear case 61 of the mobile phone 50 according to this embodiment of the present invention. FIG. 5A is a single plan view of the circuit board 101, and FIG. 5B is a rear case. FIG.
As shown in FIG. 5A, the circuit board 101 includes a test terminal 102, a solid ground 103, a shield 104, and a removable memory slot 105 mounted on the second embodiment surface S2.

The test terminal 102 is mounted on the circuit board 101 and is disposed so as to be surrounded by a solid ground 103 or a ground component such as the shield 104 and the top plate 105a of the removable memory slot 105 described below. The ground components such as the shield 104 and the top plate 105 a of the removable memory slot 105 are electrically connected to a reference portion (ground portion) in the circuit board 101 such as the solid ground 103.
The test terminal 102 is disposed at a portion of the circuit board 101 that faces the facing portion 106 a of the opening forming portion 106 that is disposed on the bottom surface portion of the battery housing portion 110.

The shield 104 is disposed on the circuit board 101 so as to cover an electronic component (not shown) mounted on the second mounting surface S2 of the circuit board 101, and protects the electronic component from external noise or the like. Suppresses the radiation of electromagnetic waves from parts to the outside.
The removable memory slot 105 is a connector part into which a removable storage medium can be inserted, and includes a ground portion on the top plate 105a.

As shown in FIG. 5B, the facing portion 106a in the opening forming portion 106 is connected to the rear case 61 by a connecting portion 106c, and a separation portion 106b is formed on the outer peripheral portion of the facing portion 106a. .
The shape of the facing portion 106a is a square shape, and the facing portion 106a causes the rear case 61 to form an opening 109 described later by disconnecting the connecting portion 106c from the rear case 61 or bending the connecting portion 106c.

The separation part 106b formed so as to have a U-shape or U-shape on the outer periphery of the facing part 106a includes, for example, a slit so that the facing part 106a can be easily separated from the rear case 61. It has a structure. Then, since the connecting portion 106c is formed on one side of the outer peripheral portion of the facing portion 106a, the facing portion 106a can be easily separated from the rear case 61, or the connecting portion 106c can be easily bent, and the opening 109 can be formed. Can be formed.
The facing portion 106a and the connecting portion 106c are formed so as to be flush with the surface of the bottom surface portion of the battery housing portion 110 in the rear case 61.

  The connection portion 106c is formed so as to be flush with the surface of the bottom surface portion of the battery housing portion 110 of the rear case 61. However, the present invention is not limited to this. For example, a groove (thin wall portion) is formed in the connection portion 106c. ) May be formed.

  FIG. 6 is a view showing the mobile phone 50 in a state where the facing portion 106a is removed from the rear case 61 and the opening 109 is formed in the rear case 61 in the present embodiment of the present invention. The top view in the battery accommodating part 110 is shown, FIG.6 (b) shows CC sectional drawing of Fig.6 (a).

  As shown in FIGS. 6A and 6B, the facing portion 106a is cut off from the rear case 61, or the connecting portion 106c is bent, so that an opening 109 is formed in the rear case 61. Then, the test terminal 102 is mounted and disposed on a portion of the circuit board 101 facing the opening 109 formed in the rear case 61, so that the test of the electrical characteristics of the circuit of the mobile phone 50 can be performed. it can.

  FIG. 7 is a view showing the mobile phone 50 when the opening forming portion 106 is covered with a covering member in the present embodiment of the present invention. FIG. 7 (a) is a plan view of the battery storage portion, and FIG. FIG. 7B is a sectional view taken along the line DD in FIG.

  As shown in FIGS. 7A and 7B, the covering member 113 is attached and disposed so as to cover the opening forming portion 106 in the bottom surface portion of the battery housing portion 110. The covering member 113 is, for example, a product label, and the covering member 113 includes, for example, a product name, a model code, a serial number, and a manufacturing date.

  The covering member 113 is preferably formed of, for example, a highly antistatic material or a synthetic resin material. For example, PET (polyethylene terephthalate: polyethylene terephthalate) is preferable. Further, it is preferably configured to be non-conductive (insulating).

As described above, when the covering member 113 is attached so as to cover the opening forming portion 106 in the bottom surface portion of the battery storage portion 110, the possibility that the facing portion 106a is removed by the user is reduced. In addition, since the separation part 106b is covered with the covering member 113, even when electrostatic discharge occurs, the discharge current can be suppressed from flowing to the circuit board 101 via the separation part 106b, and the separation part 106b is mounted on the circuit board 101. It is possible to suppress the influence of static electricity on the electronic components.
Further, since the facing portion 106a is integrally disposed on the bottom surface portion of the battery storage portion 110 so as to close the opening 109, the deflection of the covering member 113 can be suppressed, and there is no possibility of damaging the appearance.

FIG. 8 is a diagram illustrating a method of performing a test using the test terminal 102 of the mobile phone 50 in the present embodiment of the present invention.
As shown in FIG. 8, when testing the electrical characteristics of the control circuit from the outside using the test terminal 102, as shown in FIGS. 8 (a) and 8 (b), the rear case 61 is used. The test terminal 102 is exposed with the opening 109 formed in the rear case 61 by removing the facing portion 106a or bending the connecting portion 106c. Then, as shown in FIG. 8C, a fixture 114 having a shape simulating the battery 112 is fitted into the battery housing 110 and attached to the rear case 61.

  The fixture 114 includes a test pin 115, a buffer circuit 116, and a cable 117. Then, by fitting the fixture 114 into the battery housing part 110, the test pin 115 attached to the fixture 114 is connected to the test terminal 102 via the opening 109. The test pin 115 is connected to a cable 117 for communicating with a personal computer (not shown) via a buffer circuit 116 on the fixture 114. Then, tests such as the electrical characteristics of the circuit of the mobile phone 50 are performed.

  As described above, since the design of the electronic device, particularly the configuration of the rear case 61 of the second housing 52 is not changed in the development stage and the mass production stage, the test terminal 102 is connected via the opening 109 even in the mass production stage. It can be used to test the electrical characteristics of the circuit of the mobile phone 50 and the design of the circuit board 101 is not changed (case configuration) in the development stage and mass production stage, so that the cost can be reduced.

Although the embodiments have been described based on the illustrated examples, the present invention is not limited to the above-described embodiments, and can be appropriately changed within the content of the claims.
Although the present invention has been described by applying the present invention to the mobile phone 50 in the above-described embodiment, the present invention can be applied to various electronic devices, in particular, portable electronic devices such as mobile phones, electronic notebooks, and notebook mobile phones. Suitable for portable devices such as personal computers, small audio players or video playback / recording devices, portable television players, etc. that require miniaturization and thinning, and other electronic devices can do. Further, the present invention is not limited to the foldable mobile phone 50, and can be applied to a mobile phone such as a horizontal rotation type, a biaxial hinge type, a slide type, or a straight type mobile phone.
Further, in the above-described embodiment, the configuration in which the present invention is applied to the battery storage unit of the electronic device has been described. However, the present invention is not limited to this configuration, and the present invention can be applied to various parts of the electronic device. The present invention can be applied to a circuit board on which a test terminal is disposed and a portion covering the circuit board. In particular, it can be suitably implemented in the battery storage unit.

Moreover, although the shape of the opposing part 106a is a square shape, it is not limited to this, For example, polygons, such as a pentagon, and a circle may be sufficient.
In addition, the structure includes a slit as the separating portion 106b, but is not limited thereto. For example, in order to separate the facing portion from the housing by applying a force to the facing portion 106a, the rear case 61 It may be constituted by a groove so that the wall thickness becomes thin, or may be constituted by a perforation like a row of fine holes.
Further, the connecting portion 106c that connects the facing portion 106a and the rear case 61 is formed on one side of the outer periphery of the facing portion 106a, but is not limited to this. It may be formed.

  The solid ground 103, the shield 104, and the top plate 105a of the removable memory slot 105 in the present embodiment correspond to the ground portion of the present invention. Further, the covering member 113 of this embodiment corresponds to the first covering portion of the present invention. Further, the lid body 62 of the present embodiment corresponds to a second covering portion of the present invention.

FIG. 1 is a perspective view showing an external appearance of a mobile phone incorporating an electronic apparatus according to this embodiment of the present invention. FIG. 2 is an exploded perspective view of the second housing illustrated in FIG. 1. FIG. 3 is a diagram showing an electronic device in a mobile phone as an embodiment of the present invention. FIG. 3 (a) is a plan view at a position facing the battery storage portion, and FIG. AA sectional drawing in a) is shown. FIG. 4 is a drawing showing a configuration in a state in which the lid and the battery are removed, FIG. 4 (a) shows a plan view of the battery housing portion, and FIG. 4 (b) shows BB in FIG. 4 (a). A cross-sectional view is shown. 5A and 5B are diagrams showing a circuit board and a rear case of the mobile phone according to the embodiment of the present invention, in which FIG. 5A is a single plan view of the circuit board, and FIG. 5B is a single plan view of the rear case. It is. FIG. 6 is a view showing a mobile phone in a state in which the facing portion is removed from the rear case and an opening is formed in the rear case in this embodiment of the present invention, and FIG. FIG. 6B is a cross-sectional view taken along the line C-C in FIG. FIG. 7 is a view showing a mobile phone when the opening forming portion is covered with a covering member in the present embodiment of the present invention, FIG. 7A is a plan view of the battery storage portion, and FIG. FIG. 7 shows a DD cross-sectional view in FIG. FIG. 8 is a diagram illustrating a method for performing a test using a test terminal of a mobile phone according to the present embodiment of the present invention. FIG. 9 is a diagram illustrating a conventional electronic device. FIG. 10 is a diagram illustrating a conventional electronic device. FIG. 11 is a diagram illustrating a conventional electronic device.

Explanation of symbols

50: Cellular phone 51: First housing 52: Second housing 53: Connection portion 54: Display portion 55: Operation portion 56: Speaker 57: Microphone 60: Front case 61: Rear case 62: Cover body 63: Antenna 63a : Base 63b: Conductive pattern 64: Screw boss 65: Component holding part 100: Electronic device 101: Circuit board 102: Test terminal 103: Solid ground 104: Shield 105: Removable memory slot 105a: Top plate 106: Opening forming part 106a: Opposing part 106b: Separating part 106c: Connection part 109: Opening part 110: Battery storage part 112: Battery 113: Cover member 114: Fixture 115: Test pin 116: Buffer circuit 117: Cable Le S1: first mounting surface S2: second mounting surface

Claims (8)

A housing,
A circuit board housed inside the housing;
A test terminal disposed on the circuit board,
The housing is located at a portion facing the test terminal and has an opening forming portion capable of forming an opening,
The opening forming part is
Located in a portion facing the test terminal of the housing, a facing portion that defines the opening,
A connecting portion that connects the facing portion and the housing, and is cut or bent by application of force to the facing portion;
An electronic apparatus comprising: a separation portion that is provided on an outer peripheral portion of the facing portion except for the connection portion and separates the facing portion and the housing. The electronic device according to claim 1, wherein the test terminal is surrounded by a ground portion disposed on the circuit board. 2. The separation part is configured to have at least one of a slit or a groove or a perforation that separates the opposing part from the casing by applying a force to the opposing part. Or the electronic device of 2. The electronic device according to any one of claims 1 to 3, wherein the separation portion is formed at a portion facing a ground portion disposed on the circuit board. The electronic device according to any one of claims 1 to 4, wherein the opening forming portion is configured such that the facing portion can be separated from the housing at the connection portion. The electronic apparatus according to claim 1, further comprising a first covering portion that covers the opening forming portion. The housing has a recessed portion that is recessed toward the inner side with respect to the plane portion,
The electronic device according to claim 1, wherein the opening forming portion is disposed on a bottom surface of the concave portion. The electronic apparatus according to claim 7, wherein the housing includes a second covering portion that covers the concave portion.

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