JP4682939B2 - Electronics - Google Patents

Description

  The present invention has built-in conversion means for converting sound and electricity, such as a mobile phone, PHS, fixed phone, portable music player, video camera, digital camera, IC recorder, and pager, such as a speaker, buzzer, receiver or microphone. In particular, the present invention relates to an electronic device in which a sheet-like member having a large number of openings such as a mesh is arranged on the front surface of a diaphragm used for conversion by a conversion means.

  Many electronic devices such as mobile phones, PHS (Personal Handy-phone System), portable music playback devices, video cameras, digital cameras, IC recorders, pagers, etc., that can play sound using electrical signals, Speakers are arranged on the front and back of the device. In many cases, a mesh-like mesh is attached to a place where a speaker is disposed for dustproofing or waterproofing (for example, see Patent Document 1 and Patent Document 2).

  FIG. 10 shows the back of a general folding mobile phone in a folded state. An antenna 101 for transmission / reception and a first LED (Light Emitting Diode) lamp 102 are disposed on the upper back of the cellular phone 100. In addition, a rear display unit 103 is disposed slightly above the center, and a second LED 104 is disposed adjacent to the rear display unit 103. A speaker 105 is built under the second LED 104. The speaker 105 is provided with a total of five speaker sound holes 106. The rear housing cover 107 on the back side of the mobile phone 100 is provided with housing sound holes 108 to 110 for outputting sound waves. A mesh 111 is affixed to the housing sound holes 108 to 110.

  FIG. 11 shows the state of the end face of the cellular phone cut in the direction AA in FIG. However, this figure shows that only the casing on the side where the rear display unit 103 in FIG. 10 is arranged is cut off in a state in which the cellular phone 100 is opened. A screen sheet 123 that protects the liquid crystal plate 122 constituting the front display unit is attached to the opening of the front housing cover 121 connected to the rear housing cover 107. A reinforcing metal plate 124 is fixed to the back portion (upper side in the figure) of the liquid crystal plate 122. A circuit board 125 is attached to the surface of the sheet metal plate 124 opposite to the liquid crystal plate 122. The yoke 127 side of the speaker 126 is fixed to the circuit board 125.

In the speaker 126, a voice coil 131 wound around a cylindrical magnet 129 attached to a yoke 127 generates a sound by vibrating a diaphragm 132 such as cone paper by an audio signal. It has become. A protector 133 for protecting the inside of the speaker 126 is attached above the diaphragm 132, and a speaker sound hole 106 is opened in the protector 133. A cushion 134 is attached around the protector 133 in a ring shape, and a single mesh 111 is stretched thereon. A rear housing cover 107 covers the mesh 111 further. A housing sound hole 109 is opened at a location of the rear housing cover 107 cut in FIG.
Japanese Patent Laid-Open No. 05-308693 (paragraph 0005, FIG. 1) Japanese Utility Model Publication 59-003680 (4th page, 7th line to 5th page, 9th line, Fig. 1)

  In the conventional mobile phone 100 having such a structure, various colors are used for the mesh 111. The mesh 111 has a dustproof and waterproof role with respect to the speaker 126, but also has a role of concealing the inside of the housing. If the mesh constituting the mesh 111 is reduced, the effect of hiding the inside of the housing is improved, but the acoustic characteristics deteriorate. For this reason, conventionally, it has been impossible to reduce the mesh of the mesh 111 to such an extent that the inside of the housing can be sufficiently shielded.

  In view of this, by arranging the housing sound holes 108 to 110 so as to be shifted to the portion directly above the place where the speaker sound hole 106 shown in FIG. 10 is not disposed, the opening of the speaker sound hole 106 is not visible from the outside. Attempts have been made to do this. However, such a device is difficult to efficiently output sound to the outside. Therefore, in reality, as shown in FIG. 10, the speaker sound hole 106 is often clearly seen from at least a part of the housing sound holes 108 to 110, which is a negative design in terms of appearance. It was.

  The speaker that outputs sound to the outside has been described above, but the buzzer, the microphone, and the receiver have the same problem as means for converting between sound and electricity using the diaphragm.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic device in which it is difficult to see the inside of a device casing through which sound passes without impairing sound quality.

  In the first aspect of the present invention, (a) electricity / sound conversion means provided with a diaphragm that vibrates by input of an electric signal to generate sound, and (b) the electricity / sound conversion means is accommodated inside, A housing having a housing sound hole as an opening for outputting the radiated sound generated by the vibration of the diaphragm to the outside; and (c) a large number of each disposed with a space between the opening and the diaphragm. The sheet-like member closest to the housing sound hole is composed of a plurality of sheet-like members having a plurality of openings, and at least the reflectance of the surface of the member facing the opening is the reflectance of the other sheet-like member surfaces The electronic device is provided with an electric / sound conversion means shielding portion that is larger than the visual distinction between light and dark.

  That is, in the present invention, a large number of openings are provided between the housing sound hole and the diaphragm as an opening of the housing containing the electrical / sound conversion means such as a speaker having a diaphragm that generates sound by vibration. A plurality of sheet-like members are arranged at intervals, and the reflectance of the surface of the sheet-like member closest to the housing sound hole is the reflection of the surface of the other sheet-like members. Compared to the rate, it is increased at a ratio that is visually distinguished as light and dark. Thereby, when the inside of the housing is viewed from the outside of the housing, the brightness of the member surface of the sheet-like member closest to the housing sound hole is clearly higher than other places seen from the housing sound hole. Therefore, it becomes difficult to visually recognize the inside of the housing. In addition, since a plurality of sheet-like members are arranged at intervals, the sound wave passes through these sheet-like members one after another, and the sound quality is not impaired.

  In the invention described in claim 2, (a) a sound / electrical conversion means comprising a diaphragm that vibrates by external sound input and a signal conversion means for converting the vibration of the diaphragm into an electrical signal; ) A housing having a housing sound hole as an opening for accommodating the sound / electrical conversion means inside and for taking in sound for vibrating the diaphragm from the outside, and (c) between the opening and the diaphragm. The sheet-like member closest to the housing sound hole has a reflectivity of at least the member surface on the side facing the opening. The electronic device is provided with a sound / electrical conversion means shielding portion that is larger than the reflectance of the other sheet-like member surface at a ratio visually distinguishable as light and dark.

  That is, in the present invention, there are a large number of gaps between a housing sound hole and a diaphragm as an opening of a housing containing sound / light converting means such as a microphone having a diaphragm that vibrates by external sound input. A plurality of sheet-like members having a plurality of openings are arranged at intervals, and the sheet surface member closest to the housing sound hole among these sheet-like members has a reflectivity on the other member. Compared to the reflectance of the surface, it is increased at a ratio that is visually distinguished as light and dark. Thereby, when the inside of the housing is viewed from the outside of the housing, the brightness of the member surface of the sheet-like member closest to the housing sound hole is clearly higher than other places seen from the housing sound hole. Therefore, it becomes difficult to visually recognize the inside of the housing. In addition, since a plurality of sheet-like members are arranged at intervals, the sound wave passes through these sheet-like members one after another, and the sound quality is not impaired.

  As described above, when a sound wave is propagated through the housing sound hole between the diaphragm arranged inside the housing and the outside of the housing, a plurality of sheets are interposed between the housing sound hole and the diaphragm. Since the sheet-like member is arranged, the sound wave propagates satisfactorily without enlarging a large number of openings arranged in each sheet-like member. Therefore, the dustproof or waterproof function by these sheet-like members can be enhanced.

  Further, according to the present invention, the reflectance of the surface of the member facing the opening of the sheet-shaped member closest to the housing sound hole is visually compared with the reflectance of the surface of the other sheet-shaped member. As a result, it is difficult to see the inside of the housing, and as a result, it is necessary to reduce the area of the housing sound hole or change the position of the housing sound hole from the ideal position. Absent. Therefore, it is possible to ensure good sound pressure characteristics without impairing the design of electronic devices such as mobile phones.

  Hereinafter, the present invention will be described in detail with reference to examples.

  FIG. 1 shows the appearance of a mobile phone as an electronic apparatus equipped with a speaker in one embodiment of the present invention. The cellular phone 200 of this embodiment is a foldable phone, and has a structure in which a first casing 201 and a second casing 202 are connected by a hinge mechanism 203. The first housing 201 is attached with an antenna 204 for communicating with a fixed telephone (not shown) or another mobile phone or a PHS via a base station (not shown). A front display unit 205 made up of a liquid crystal display for displaying necessary visual information made up of figures and the like is arranged. On the upper side of the front display unit 205, a receiver 206 for listening to the sound by placing the user's ears during a call, a camera unit 207, and a first LED lamp 208 are arranged. The camera unit 207 connects an image of an object to be imaged to an image sensor (not shown) using an optical lens, and shoots a still image or a moving image. The camera unit 207 is one of important functions of the mobile phone. The first LED lamp 208 emits light across the front side surface and the back side surface so that the lighting can be confirmed even when the first casing 201 is closed, and is not illustrated in the present embodiment. When the built-in battery is charging, it lights up in red, and when it is completed, it turns off. In addition, it emits light in any color when receiving an incoming call or mail or during a call.

  The second casing 202 has a key operation unit 211 on the front side and a microphone 212 in the vicinity of the lower end. The key operation unit 211 is used for performing various input operations such as an input operation when dialing the other party, an operation for performing various settings provided in the mobile phone 200, or a character input operation for creating an e-mail. It consists of multiple key switches. The microphone 212 is used to convert a user's voice into an electrical signal during a call. The side of the second housing 202 does not use an earphone cover 214 that covers the earphone jack 214 to prevent entry of dust or water droplets when an earphone jack (not shown) is not used, and an external connection terminal (not shown). In some cases, an external connection terminal cover 215 is provided that covers to prevent entry of dust and water droplets.

  2 shows the back side of the first housing with the cellular phone shown in FIG. 1 closed. On the back side of the first housing 201, a rear display unit 221 is disposed at a position slightly closer to the first LED lamp 208 than the center position, and the second LED 222 is adjacent to the first LED lamp 208. Has been placed. The rear display unit 221 includes a liquid crystal display that displays necessary visual information including characters, symbols, figures, and the like. The rear display unit 221 can display simple information even when the front display unit 205 shown in FIG. 1 cannot be used with the cellular phone 200 folded. The second LED 222 is sometimes referred to as an illumination unit, and an LED capable of emitting light of two or more different colors is disposed therein. For example, the second LED 222 emits light of an arbitrary color when an incoming call or mail is received or during a call. It is like that.

  Case sound holes 223 to 225 are arranged on the back surface portion of the first case 201 between the second LED 222 and the hinge mechanism 203. The case sound holes 223 to 225 are for outputting the vibration of the sound output from the speaker 226 built in the first case 201 to the outside. The speaker 226 generates a sound (melody) when an incoming call is received or when a melody is downloaded, and informs the user of the incoming call or notifies information by sound. Also, when using the hands-free function, a received sound is output as the voice of the other party. The earphone jack cover 214 is a cover attached to prevent intrusion of dust and water droplets from the earphone terminal when the earphone is not used.

  FIG. 3 shows an end face obtained by cutting the first casing in the BB direction of FIG. 2, and corresponds to FIG. 11 of a conventional mobile phone. A transparent screen sheet that protects the surface of the liquid crystal plate 233 constituting the front display unit 205 (FIG. 1) at the opening of the front casing cover 232 connected to the rear casing cover 231 of the first casing 201. 234 is attached. The rear housing cover 231 and the front housing cover 232 form a body as an outer portion of the mobile phone 200. The rear housing cover 231 and the front housing cover 232 are in close contact with each other by screwing and fitting claws (not shown). A reinforcing metal plate 235 is fixed to the back portion (upper side in the drawing) of the liquid crystal plate 233. A circuit board 236 is attached to the surface of the sheet metal plate 235 opposite to the liquid crystal plate 233. The circuit board 236 includes DSP (Digital Signal Processor), CSP (Chip Size Package), amplifiers, resistors, capacitors, etc. as parts for realizing various functions such as melody output, incoming / outgoing calls, and mail transmission / reception in the mobile phone 200. The circuit parts are soldered. The circuit board 236 also has a yoke 237 of the speaker 226 fixed thereto.

  Positive and negative currents flow through the voice coil 241 wound around a cylindrical magnet 239 attached to the yoke 237 in accordance with the sound. As a result, a magnetic field is generated between the yoke 237 and the magnet 239 attached thereto, and the voice coil 241 vibrates up and down. The diaphragm 242 made of cone paper or the like connected to the voice coil 241 vibrates accordingly, thereby generating sound.

  A protector 243 is attached above the diaphragm 242 to protect it. The protector 243 is provided with a speaker sound hole 247 for emitting sound generated by vibration of the diaphragm 242. In this embodiment, a total of five speaker sound holes 247 are opened. In addition, a back sound hole 249 is formed in the back direction of the speaker 226 which is a position (four locations) facing the diaphragm 242 in the case 248 connecting the yoke 237 and the protector 243. The back sound hole 249 prevents vibration suppression on the diaphragm 242 by providing an air passage on the back side. The number, size, and position of the holes of the speaker sound hole 247 and the back sound hole 249 can be arbitrarily determined.

  A cushion 251 having a first thickness is attached in a ring shape around the protector 243, and a black lower mesh 252 is stretched thereon. A double-sided tape 253 having a second thickness is affixed on the cushion 251 and a white upper mesh 254 is affixed to the top.

  The lower mesh 252 and the upper mesh 254 are for preventing the generation of noise due to the entry of foreign matter such as sand, dust, and water droplets into the speaker 226. The cushion 251 is disposed between the lower mesh 252 and the protector 243. The cushion 251 serves to prevent the sound leakage of the sound emitted from the speaker sound holes 247 provided corresponding to the five speaker sound holes 106 shown in FIG. 10 by pressing the double-sided tape 253 to the rear housing cover 231. I am doing.

  Both the lower mesh 252 and the upper mesh 254 are woven so that polyester yarns are crossed at right angles in a net shape. In this embodiment, about 330 yarns are used. These openings (opening) are about 42 μm, and the opening ratio as a ratio of the opening portion per unit area is about 30%. Further, the thickness of the double-sided tape 253 is about 0.1 mm, and therefore the distance between the lower mesh 252 and the upper mesh 254 is about 0.1 mm.

  A rear housing cover 231 covers the upper mesh 254. The upper adhesive surface of the double-sided tape 253 is bonded to the lower surface of the rear housing cover 231 together with the upper mesh 254. A housing sound hole 224 is opened at a location of the rear housing cover 231 cut in FIG.

  FIG. 4 shows the main part of the rear housing cover of the mobile phone of this embodiment. A white upper mesh 254 is disposed on the front surface of the speaker 226, and a lower mesh 252 (see FIG. 3) that is not visible in appearance is disposed at a predetermined interval below the white upper mesh 254. In addition, housing sound holes 223 to 225 are disposed in a portion of the rear housing cover 231 above the region where the speaker 226 is disposed.

  In such an arrangement, when the rear housing cover 231 is viewed from the front, a part of the housing sound holes 223 to 225 (the housing sound holes 223 and 224 in the drawing) overlaps with the speaker sound holes 247 in position. However, in this embodiment, it is difficult to identify the speaker sound hole 247 below the upper mesh 254. The reason for this will be described next.

  FIG. 5 shows the appearance and reflection of external light at the location of the housing sound hole in this embodiment. In the present embodiment, the upper mesh 254 is white with high light reflectance, and the lower mesh 252 disposed under the upper mesh 254 is black with high light absorption. Therefore, for example, among the light 261 incident on the housing sound hole 224 shown in FIG. 2, the intensity of the light 261H reflected by the upper mesh 254 is strong, whereas the light reaching the lower mesh 252 is large. Part is absorbed and hardly reflected towards the outside. Further, the light transmitted through the upper mesh 254 and the lower mesh 252 reaches the protector 243 of the speaker 226 and further to the internal diaphragm 242. If these are also colored in black or dark, most of them are colored. Absorbed. Thus, the reflectance of the surface of the upper mesh 254 is larger than the reflectance of the surface of the lower mesh 252 at a ratio that is visually distinguished from light and dark.

  Further, most of the light 261P and 261S reflected from the protector 243 and the diaphragm 242 reaches the lower mesh 252 and is absorbed there, or reaches the upper mesh 254 and enters the speaker 226 again. Reflected towards. The reflected light toward the inside of the speaker 226 is often absorbed again by the lower mesh 252 or by other members such as the diaphragm 242. For this reason, the amount of light that passes through the upper mesh 254 and travels into the speaker 226 is reflected outside the speaker 226 is greatly reduced.

  On the other hand, the light 261H reflected by the upper mesh 254 enters the user's eyes 262 staring at the housing sound hole much more strongly than the other reflected light. The user adjusts the iris of the eye 262 to automatically adjust the amount of incident light. As a result, relatively weak light reaching the eyes 262 by reflecting from the inside of the speaker 226 to the outside is hardly recognized. Therefore, it is difficult for the user to identify the protector 243, the diaphragm 242 or the appearance of these while viewing the bright upper mesh 254.

  On the other hand, the radiated sound due to the vibration of the diaphragm 242 first passes through the speaker sound hole 247. Since the mesh of the lower mesh 252 is not particularly small, it passes through the mesh without any deterioration in acoustic characteristics. Next, since the mesh of the upper mesh 254 is not particularly small, this also passes through without any deterioration in acoustic characteristics. In this way, the passage of sound through the speaker 226 is not limited, and light can be effectively shielded from the inside. Accordingly, even if the arrangement and diameter of the three housing sound holes 223 to 225 and the five speaker sound holes 247 are not uniform, the diameters of the three housing sound holes 223 to 225 are reduced. In addition, a structure in which the five back sound holes 249 are difficult to see from the housing sound holes 223 to 225 is realized without changing the sound hole position. For this reason, the design of the mobile phone 200 is not affected.

  As described above, according to the embodiment, since the upper mesh 254 is white, the reflected light is strong and bright. Therefore, the light that enters the speaker 226 and returns as reflected light becomes relatively dark, and as a result, there is an effect of making it difficult to see through the interior. In addition, since the two meshes are stretched at a slight interval and the lower mesh 252 disposed on the lower side is black, the presence of the upper mesh 254 is emphasized by absorbing incident light, increasing the above-described effect. I will let you. That is, when the lower mesh 252 is also white, the upper mesh 254 is the brightest, and the lower mesh 252 is somewhat light gray due to some restriction of incident light, so that the user's eyes 262 change the brightness. The speaker sound hole 247 provided in the protector 243 is easily noticeable. In this embodiment, such a situation does not occur.

  For this reason, it is not necessary to reduce the diameter of the casing sound holes 223 to 225 or to change the sound hole positions as in the conventional case. In addition, the radiated sound due to the vibration of the diaphragm 242 does not need to be particularly small due to the presence of the lower mesh 252 and the upper mesh 254. Therefore, it is possible to ensure good sound pressure characteristics without restricting the design of the mobile phone 200.

  <First Modification of Invention>

  FIG. 6 shows the upper mesh in the first modification of the present invention, and FIG. 7 shows the lower mesh. The white upper mesh 254A shown in FIG. 6 and the black lower mesh 252A shown in FIG. 7 are both circular with the same diameter as the ring-shaped cushion 251 shown in FIG. Positioning portions 301 and 302 are provided at specific positions on the circumference. When the directions of the positioning portions 301 and 302 are made to coincide, the mesh pattern of the upper mesh 254A is a pattern obtained by rotating the lower mesh 252A by 45 degrees around the center of the circle. For this reason, it is possible to easily realize a state in which the patterns of the upper mesh 254A and the lower mesh 252A are rotated by 45 degrees.

  FIG. 8 shows a state in which the upper mesh and the lower mesh are positioned and spaced apart from each other when viewed from the direction perpendicular to these surfaces. The upper mesh 254A and the lower mesh 252A have patterns that differ by 45 degrees. For this reason, the probability that the light ray that has passed through the upper mesh 254A is blocked by the lower mesh 252A is higher than in the previous embodiment. Therefore, the light shielding property inside the speaker 226 (see FIG. 3) is improved as compared with the embodiment.

  <Second Modification of Invention>

  FIG. 9 shows the upper mesh in the second modification of the present invention. Unlike the first modified example, the white upper mesh 254B of the second modified example only changes the black lower mesh 252A shown in FIG. 7 to white, and the pattern is the same as the lower mesh 252A. Are the same. In the second modification, the lower mesh 252A is arranged on the side close to the speaker 226 (see FIG. 3). Then, when the upper mesh 254B is arranged on the upper side with a space therebetween, the positioning directions of the positioning portions 301B and 302A are made to coincide with each other, but the upper mesh 254B is shifted and fixed in the positioning direction by a half pitch of the mesh.

  Thereby, when the distance between the upper mesh 254B and the lower mesh 252A is relatively narrow, even if the user's eyes are inclined at a slight angle from the front of the speaker 226 (see FIG. 3), the meshes do not overlap, The probability that the light beam that has passed through the upper mesh 254B is shielded by the lower mesh 252A is higher than in the previous embodiment. Therefore, the obliqueness inside the speaker 226 is improved as compared with the embodiment.

  <Other deformation possibilities of the invention>

  In the embodiments and modifications described above, the upper meshes 254, 254A, and 254B are white and the lower meshes 252 and 252A are black. However, the present invention is not limited to this. For example, the upper surface of the upper meshes 254, 254A, 254B may be applied in white and the lower surface may be applied in black. Further, at least the upper surface of the upper meshes 254, 254A, 254B may be metal-plated to increase the reflectance. Furthermore, even if it is not white, the color and density | concentration with high reflectance may be sufficient. For example, whitish gray or bright yellow or orange as a fluorescent color can be given as an example. The lower meshes 252 and 252A need not be black, and may have a color and density with low reflectance. For example, amber and indigo can be cited as examples.

  Furthermore, in this embodiment and the modified example, two layers of 254, 254A and 254B and a lower mesh 252 and 252A are used. However, in an electronic device in which further thickness is allowed, for example, three layers are formed by using a thinner thread. The above mesh structure is also possible. In addition, the application target of the present invention is not limited to a mobile phone, and it is a matter of course that all electronic devices including an electrical / sound conversion unit such as a speaker or a sound / electrical conversion unit such as a microphone are targeted.

  Further, in the examples, the lower mesh 252 and the upper mesh 254 were created by crossing polyester yarns in a net shape, but the material and the mesh forming method, the mesh opening ratio, and the spacing between the meshes may be changed as appropriate. Of course. For example, the mesh may be obtained by punching a large number of holes in a sheet-like material.

1 is a perspective view illustrating an appearance of a mobile phone in an opened state according to an embodiment of the present invention. It is the perspective view seen from the back direction of the 1st case in the state where the cellular phone of this example was closed. FIG. 3 is an end view showing an end surface when the first casing is cut in the BB direction of FIG. 2. It is a top view showing the principal part of the rear housing | casing cover of the mobile telephone of a present Example. It is explanatory drawing showing the mode of incident of external light and the reflection in the location of a housing | casing sound hole in a present Example. It is a top view showing the upper side mesh in the 1st modification of the present invention. It is a top view showing the lower mesh in the 1st modification. It is the top view which looked at the state which positioned the upper side mesh and the lower side mesh in the 1st modification, and has arrange | positioned at intervals up and down from the perpendicular direction. It is a top view showing the upper side mesh in the 2nd modification of the present invention. It is the top view which showed the back surface of the folded state of a common folding type mobile phone. FIG. 11 is an end view showing an end surface when the mobile phone is cut in the AA direction in FIG. 10.

Explanation of symbols

200 Mobile phone (electronic equipment)
223 to 225 Housing sound hole 226 Speaker 242 Diaphragm (electricity / sound conversion means, sound / electricity conversion means)
243 Protector 247 Speaker sound hole 252, 252A Lower mesh 254, 254A, 254B Upper mesh 261 Light 262 User's eyes 301, 302 Positioning unit

Claims (7)

An electrical / sound conversion means comprising a diaphragm that vibrates by the input of an electrical signal to generate sound;
A housing provided with a housing sound hole as an opening for accommodating the electricity / sound conversion means inside and outputting the radiated sound generated by the vibration of the diaphragm to the outside;
The sheet-like member that is disposed between the opening and the diaphragm and is spaced apart from each other and has a plurality of openings, each of which is closest to the housing sound hole, faces at least the opening. And an electrical / sound conversion means shielding portion in which the reflectance of the surface of the member on the side to be increased is larger than the reflectance of the surface of the other sheet-like member in a ratio visually distinguishable as light and dark. Electronic equipment. A sound / electrical conversion means comprising a diaphragm that vibrates in response to external sound input and a signal conversion means that converts the vibration of the diaphragm into an electrical signal;
A housing provided with a housing sound hole as an opening for accommodating this sound / electrical conversion means inside and taking in sound for vibrating the diaphragm from outside,
The sheet-like member that is disposed between the opening and the diaphragm and is spaced apart from each other and has a plurality of openings, each of which is closest to the housing sound hole, faces at least the opening. And a sound / electrical conversion means shielding portion in which the reflectance of the surface of the member on the side to be increased is larger than the reflectance of the surface of the other sheet-like member in a ratio visually distinguishable as light and dark. Electronic equipment.   The plurality of sheet-like members are two sheet-like members, the sheet-like member closest to the housing is white on both sides, and the other sheet-like members are black on both sides. The electronic device according to claim 1, wherein the electronic device is characterized.   A protector as a plate-like member that protects the diaphragm is disposed outside the diaphragm, and the protector serves as an opening for allowing sound to pass between the outside and the inside of the housing. 3. The electronic device according to claim 1, wherein a sound hole for the conversion means is opened.   3. The electronic apparatus according to claim 1, wherein the sheet-like member is formed in a mesh pattern.   Each of the sheet-like members is composed of meshes of the same pattern, and includes a rotation angle positioning unit for positioning the meshes in the casing with different rotation positions of the meshes by a desired angle. 6. The electronic apparatus according to claim 5, wherein   Each of the sheet-like members is composed of meshes of the same pattern, and is provided with a displacement positioning part for positioning these mesh patterns in the casing by relatively shifting them in a certain direction by a desired distance. 6. The electronic apparatus according to claim 5, wherein

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