WO2019026235A1 - Instrument de musique électronique - Google Patents

Instrument de musique électronique Download PDF

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Publication number
WO2019026235A1
WO2019026235A1 PCT/JP2017/028241 JP2017028241W WO2019026235A1 WO 2019026235 A1 WO2019026235 A1 WO 2019026235A1 JP 2017028241 W JP2017028241 W JP 2017028241W WO 2019026235 A1 WO2019026235 A1 WO 2019026235A1
Authority
WO
WIPO (PCT)
Prior art keywords
case
screw
circuit board
hole
musical instrument
Prior art date
Application number
PCT/JP2017/028241
Other languages
English (en)
Japanese (ja)
Inventor
賢一 芝
和希 若山
佳之 平井
Original Assignee
ヤマハ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ヤマハ株式会社 filed Critical ヤマハ株式会社
Priority to PCT/JP2017/028241 priority Critical patent/WO2019026235A1/fr
Publication of WO2019026235A1 publication Critical patent/WO2019026235A1/fr

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/32—Constructional details

Definitions

  • the present invention relates to an electronic musical instrument having a configuration in which a screw for fastening a case penetrates a circuit board.
  • a circuit board on which various electronic components are mounted is provided in a housing of an electronic musical instrument.
  • a circuit board is disposed between the lower case and the upper case.
  • Mounting holes are provided at four corners (corners) of the circuit board, and screws are inserted into these mounting holes, and the screws are screwed into the upper surface plate, whereby the circuit board is fixed to the board base.
  • the screw In a housing having a configuration in which two cases are fastened with a screw, the screw may be inserted from the outside, and the head of the screw may be exposed to the outside.
  • the screw head may be configured to fit in a recessed position so that the screw head does not protrude.
  • static electricity may be discharged to the screw when the user's body with electrostatic contact touches or approaches the screw.
  • static electricity may be transmitted to the electronic component and may adversely affect the electronic component. Therefore, it is necessary to protect the electronic component from static electricity.
  • the space distance between the member such as a screw or the like which receives the static electricity and the electronic component needs at least about 10 mm. If there is a margin in design as a position where the screw penetrates the circuit board, it is possible to select, for example, four corner portions of the circuit board apart from the mounting position of the electronic component. However, in a small-sized musical instrument, there is not enough space, and it is not possible to select a position such as a corner of a circuit board as a screw penetration position, and it may be necessary to dispose the through hole at a position near the electronic component. Then, electronic components close to the screws are likely to be affected by static electricity.
  • An object of the present invention is to provide an electronic musical instrument capable of protecting an electronic component from static electricity discharged to a screw.
  • a conductive member (40) having a portion (41-1) closer to the screw and having a portion (42) electrically connected to the ground terminal as compared to the electronic component (31) closest to the An electronic musical instrument is provided.
  • the code in the said parenthesis is an illustration.
  • an electronic component can be protected from static electricity discharged to a screw.
  • FIG. 2 is a perspective view of the electronic musical instrument showing a cross section taken along the line AA of FIG. 1;
  • FIG. 2 is a perspective view of a circuit board showing a cross section taken along the line AA of FIG. 1;
  • FIG. 1 is a perspective view of a part of an electronic musical instrument according to an embodiment of the present invention.
  • the electronic musical instrument 100 has a main body 27 and a neck 23.
  • the main body unit 27 is provided with a keyboard unit KB composed of a plurality of keys.
  • Two hooks are provided on the bottom of the main body 27 opposite to the side on which the keyboard KB is disposed, and a strap (not shown) can be hooked on these hooks.
  • the strap can be put on the shoulder to perform performance such as the operation of the keyboard KB. Also, it is possible to play by placing the bottom of the main body 27 on a support.
  • the side on which the keyboard portion KB is disposed is the upper side, and the opposite side is the lower side.
  • the exterior of the main body portion 27 is the main body case 10, and the main body portion 27 is provided with a display cover 13 which transmits light of the display portion.
  • the exterior of the neck portion 23 is a neck case 20.
  • the main housing 10 and the neck housing 20 are fastened by screws 15 which are a plurality of fastening members described later.
  • FIG. 2 is a perspective view of the electronic musical instrument 100 showing a cross section taken along the line AA of FIG.
  • the neck case 20 is configured by the cooperation of the lower case 21 and the upper case 22.
  • the main body case 10 is configured by the cooperation of the lower first case 11 and the upper second case 12.
  • the cases 21, 22, 11, 12 are all made of resin, and are electrically nonconductive members (nonconductive members).
  • the circuit board 30 is disposed between the first case 11 and the second case 12. Below the circuit board 30, a copper foil tape 40, which is a conductive member (conductive member), is disposed.
  • the lower case 21 has a horizontal portion 24 extending below the circuit board 30 in parallel with the circuit board 30.
  • the horizontal portion 24 is an intervening member interposed between the copper foil tape 40 and the circuit board 30.
  • bosses 14 that are recessed upward (inward) are formed at a plurality of locations.
  • FIG. 3 is a perspective view of the circuit board 30 showing a cross section taken along the line AA of FIG.
  • FIG. 4 is a perspective view of the copper foil tape 40 showing a cross section taken along the line AA of FIG. Since the circuit board 30 is disposed from the neck case 20 to the main body case 10, the cross section of the circuit board 30 appears in FIGS. 2 and 3 in the direction in which the keys are arranged. Among the plurality of corner portions (four corners and the like) of the circuit board 30, the corner portions 30c and 30d appear. Electronic components can be mounted on both the front surface 30 b and the back surface 30 a of the circuit board 30. In FIG. 3, the electronic components 31, 23, 33 are shown as part of the mounted components, but other mounted components exist.
  • a plurality of through holes 38 are formed in the circuit board 30 (FIG. 3).
  • a plurality of holes 41 (41-1, 41-2, 41-3) are formed in the copper foil tape 40 corresponding to the respective through holes 38 (FIG. 4).
  • a screw 15 is inserted through each of the through hole 38 and the hole 41.
  • screws 15-1, 15-2 and 15-3 are shown.
  • the positions of the through holes 38 and the holes 41 correspond to the positions of the bosses 14 of the first case 11. Similar sets may exist besides the set of through holes 38, holes 41 and screws 15 shown in FIGS. As a representative, the configuration of the set including the screw 15-1 and the related elements will be described.
  • an insertion hole 25 is formed in the lower case 21, an insertion hole 26 is formed in the upper case 22, and a screw hole 16 is formed in the second case 12. It is formed.
  • the screw 15-1 is inserted from the bottom side (outside) of the first case 11, and the hole of the boss portion 14, the insertion hole 25 of the lower case 21, the through hole 38 of the circuit board 30, and the hole 41- of the copper foil tape 40. 1 penetrates the insertion hole 26 of the upper case 22 and is screwed into the screw hole 16 of the second case 12.
  • the first case 11 and the second case 12 are fastened, and the circuit board 30 and the copper foil tape 40 are sandwiched and held between the lower case 21 and the upper case 22.
  • the female screw groove of the screw hole 16 may be formed by self tapping along with the screwing of the screw 15-1.
  • the configuration of the screw 15 other than the screw 15-1 and the corresponding boss portion 14, the insertion hole 25, the insertion hole 26, and the screw hole 16 is the same as that described for the screw 15-1.
  • the head 15 a of the screw 15 is exposed to the outside.
  • the head 15a fits in the recessed portion of the boss portion 14, but the user's body may approach or touch the head 15a.
  • the user's body is charged with static electricity, the static electricity may be discharged to the head portion 15a, so it is necessary to take measures so as not to affect the mounted components of the circuit board 30.
  • the copper foil tape 40 is provided in order to escape to the ground 39 (FIG. 4) provided on the electronic musical instrument 100 without transmitting the electricity discharged to the screw 15 to the mounted components.
  • a ground terminal 34 is provided at a corner 30 c which is one of the plurality of corners of the circuit board 30.
  • the ground terminal 34 is provided on both the front surface 30 b and the back surface 30 a of the circuit board 30, but may be provided on one side.
  • the main portion 43 of the copper foil tape 40 is disposed substantially parallel to the back surface 30 a along the back surface 30 a which is one of the substrate surfaces of the circuit board 30.
  • the main portion 43 is formed to pass through the arrangement position of the screws 15-1, 15-2, 15-3. Since the horizontal portion 24 of the lower case 21 intervenes between the circuit board 30 and the main portion 43, the main portion 43 of the copper foil tape 40 is against the back surface 30 a of the circuit board 30 in the range where the horizontal portion 24 exists. Do not touch Thereby, the main part 43 and the circuit board 30 are electrically insulated.
  • the copper foil tape 40 has a folded portion 42 folded back in the vicinity of the corner 30 c.
  • a screw 17 passes through the folded portion 42 and the main portion 43 in a state in which the corner portion 30 c of the circuit board 30 is sandwiched between the folded portion 42 and the main portion 43.
  • the screw 17 is screwed into the first case 11.
  • a connector 36 is electrically connected to the ground terminal 34, and the connector 36 is electrically connected to the ground 39 through a conductor 37.
  • the electricity discharged to the copper foil tape 40 is guided to the ground 39 through the ground terminal 34, the connector 36 and the lead 37.
  • the screw 15 is inserted through the hole 41 of the copper foil tape 40.
  • the inner diameter of the hole 41 is equal to or slightly larger than the outer diameter of the cylindrical portion other than the head portion 15 a of the screw 15 and the male screw portion.
  • the inner diameter of the hole 41 is larger than the inner diameter of the through hole 38.
  • the hole 41 and the screw 15 may be in contact with each other, but may not be in contact with each other. Since the hole 41 is shaped so as to surround the screw 15, even if the axis of the screw 15 and the center of the hole 41 are slightly misaligned, the closest distance between the inner edge of the hole 41 and the outer shell of the screw 15 is It does not become excessive. Since the shortest distance between the inner edge of the hole 41 and the outer shell of the screw 15 is sufficiently short, the electricity discharged to the screw 15 is surely induced to the copper foil tape 40.
  • the mounted component arranged at the position closest to the screw 15-1 (the shortest distance between the closest parts) is the electronic component 31.
  • the electronic component 31 is, for example, a CPU.
  • the distance between the inner edge of the hole 41-1 and the outer periphery of the screw 15 is designed to be sufficiently short with respect to the distance between the screw 15-1 and the electronic component 31. That is, the hole 41-1 is a portion closer to the screw 15-1 compared to the electronic component 31.
  • the electricity discharged to the screw 15-1 is induced to the copper foil tape 40 without being induced to the electronic component 31, and the occurrence of an electrical adverse effect on the electronic component 31 is avoided.
  • the distance between the inner edge of the hole 41 and the outer shell of the screw 15 is sufficiently short for the electronic components 32 and 33 closest to each other.
  • the copper foil tape 40 has a hole 41 which is a portion closer than the electronic component (31 and the like) closest to the screw 15, and a portion electrically connected to the ground terminal 34 (folded portion 42 Etc.).
  • the static electricity discharged to the screw 15 is not transmitted to the electronic components 31 and the like, and is induced to the ground terminal 34 through the copper foil tape 40, so that the electronic components 31 can be prevented from being affected. . Therefore, the electronic component 31 can be protected from static electricity discharged to the screw 15.
  • the horizontal portion 24 of the lower case 21 made of a nonconductive member is interposed between the main portion 43 of the copper foil tape 40 and the circuit board 30, the substrate surface (main portion 43) and the copper foil tape 40 Contact can be avoided and both can be electrically isolated. Thereby, the static electricity discharged to the screw 15 can be prevented from being transmitted to the circuit board 30, and the electronic component 31 can be protected.
  • the horizontal part 24 is a part of the lower case 21 and an increase in the number of parts is avoided, from the viewpoint of insulation, the horizontal part 24 is a member different from the lower case 21, for example, a non-dedicated member. It may be a conducting member.
  • the holes 41 are disposed so as to surround the screws 15, the distance between the holes 41 and the screws 15 does not become excessive even if there is a positional deviation between the screws 15 and the copper foil tape 40 in the horizontal direction. Thereby, the static electricity discharged to the screw 15 can be reliably transmitted to the copper foil tape 40.
  • the hole 41 may not be completely circular, and may have a shape surrounding the screw 15. Therefore, the copper foil tape 40 may be formed in a substantially annular shape in which a portion is lost, instead of the hole 41.
  • the substantially annular shape does not have to be approximate to a circle, and may be another shape such as a rectangle.
  • the holes 41 substantially surround the through holes 38. Therefore, even if there is a positional deviation between the screw 15 and the circuit board 30 in the horizontal direction, the hole 41 can be present at a position closer to the electronic component closest to the screw 15 than the screw 15. Also in this case, the static electricity discharged to the screw 15 can be reliably transmitted to the copper foil tape 40.
  • At least one of the plurality of through holes 38 of the circuit board 30 is formed in an area other than the corner of the circuit board 30.
  • a conductive member made of another material may be employed.
  • the conducting member may be, for example, an aluminum foil tape or a metallic sheet metal.
  • the shape of the conductive member is not limited to a sheet type such as a tape, and the conductive member may be constituted by a plurality of pieces.
  • the electronic musical instrument to which the present invention can be applied includes not only a keyboard musical instrument but also an electronic musical instrument in which strings are arranged like a guitar.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mounting Of Printed Circuit Boards And The Like (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Elimination Of Static Electricity (AREA)

Abstract

L'invention concerne un instrument de musique électronique qui peut protéger un composant électronique de l'électricité statique qui a été déchargée dans une vis. Selon la présente invention, un boîtier de corps principal (10) est conçu de façon coopérative à partir d'un premier boîtier inférieur (11) et d'un second boîtier supérieur (12). Une carte de circuit imprimé (30) est disposée entre le premier boîtier (11) et le second boîtier (12). Une vis (15) est insérée à partir d'un côté de surface inférieure (l'extérieur) d'un premier boîtier (11), passe à travers un trou dans une partie bossage (14), un trou d'insertion (25) dans un boîtier inférieur (21), un trou d'insertion (38) dans la carte de circuit imprimé (30), un trou (41) dans une bande de feuille de cuivre (40) et un trou d'insertion (26) dans un boîtier supérieur (22) et vissée dans un trou de vis (16) dans le second boîtier (12). Le trou (41) dans la bande de feuille de cuivre (40) est encore plus proche de la vis (15) qu'un composant électronique (31) qui est le plus proche de la vis (15). Une partie repliée (42) de la bande de feuille de cuivre (40) et la portion d'une partie principale (43) qui fait face à la partie repliée (42) sont électriquement connectées à une borne de masse (34) pour la carte de circuit imprimé (30).
PCT/JP2017/028241 2017-08-03 2017-08-03 Instrument de musique électronique WO2019026235A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/028241 WO2019026235A1 (fr) 2017-08-03 2017-08-03 Instrument de musique électronique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/028241 WO2019026235A1 (fr) 2017-08-03 2017-08-03 Instrument de musique électronique

Publications (1)

Publication Number Publication Date
WO2019026235A1 true WO2019026235A1 (fr) 2019-02-07

Family

ID=65233651

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/028241 WO2019026235A1 (fr) 2017-08-03 2017-08-03 Instrument de musique électronique

Country Status (1)

Country Link
WO (1) WO2019026235A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH078896U (ja) * 1993-06-25 1995-02-07 株式会社河合楽器製作所 ショルダーキーボード
JPH08274486A (ja) * 1995-03-31 1996-10-18 Canon Inc 電子機器
WO2004062336A1 (fr) * 2002-12-27 2004-07-22 Sony Computer Entertainment Inc. Plaque et structure de blindage electromagnetique et dispositif electronique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH078896U (ja) * 1993-06-25 1995-02-07 株式会社河合楽器製作所 ショルダーキーボード
JPH08274486A (ja) * 1995-03-31 1996-10-18 Canon Inc 電子機器
WO2004062336A1 (fr) * 2002-12-27 2004-07-22 Sony Computer Entertainment Inc. Plaque et structure de blindage electromagnetique et dispositif electronique

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