Electronic device, electronic musical instrument, and method for assembling electronic device

Abstract

To provide a keyboard instrument as an electronic device that can have a long product life by making it easy to replace parts of a case.SOLUTION: A keyboard instrument 10 as an electronic device comprises: an upper case 20 as a first layer member in which a keyboard 5 as an input device is provided; a lower case 30 as a second layer member; a plurality of intermediate cases 100 provided as intermediate layer members overlapping between the first layer members and the second layer members and each having, inside the keyboard instrument 10, apertures including apertures 114-144, a left aperture 154 L, and a right aperture 154R; and internal components disposed inside space S1 formed by the aperture provided in each of the plurality of intermediate cases 100.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an electronic device, an electronic musical instrument, and a method for assembling an electronic device. [Background technology]

[0002] Conventionally, electronic musical instruments have been disclosed as electronic devices having an upper case and a lower case, which are multiple members. For example, a keyboard musical instrument as an electronic musical instrument disclosed in Patent Document 1 has an upper case covering the upper and rear surfaces, a lower case having a bottom plate, and a pair of side cases. A reinforcing member is provided between the upper case and the lower case. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-27919 A DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0004] In the case of the conventional keyboard instruments described above, if some of the components constituting the case of the keyboard instrument become contaminated or damaged, for example in the case of the upper case, it is necessary to replace the entire large upper case, which is not easy to replace and results in a short product lifespan.

[0005] An object of the present invention is to provide an electronic device, an electronic musical instrument, and a method of assembling an electronic device that allows easy part replacement and extends the product life. [Means for solving the problem]

[0006] The electronic device of the present invention comprises a first layer member on which an input device is provided, a second layer member, a plurality of intermediate layer members overlapping the first layer member and the second layer member, each having an opening hole therein, and internal components positioned inside the space formed by the opening holes provided in each of the plurality of intermediate layer members.

[0007] The electronic musical instrument of the present invention comprises a first layer member on which a keyboard is provided, a second layer member, and a number of intermediate layer members overlapping the first layer member and the second layer member, each of which has an opening hole therein.

[0008] The method for assembling an electronic device of the present invention is a method for assembling an electronic device comprising a first layer member, a second layer member, and a plurality of intermediate layer members having an outer size larger than the first layer member and the second layer members, the method comprising: a first step of inserting a fixing member into a second layer member having a second fixing hole; a second step of stacking the plurality of intermediate layer members on top of the second layer member by inserting the fixing member into intermediate fixing holes provided outside the opening holes in a plurality of intermediate layer members each having an opening hole; and a third step of placing a first layer member having a first fixing hole including an input device on top of the plurality of intermediate layer members, and fixing the second layer member, the plurality of intermediate layer members and the first layer member at the position of the first fixing holes. Effect of the Invention

[0009] According to the present invention, it is possible to provide an electronic device, an electronic musical instrument, and a method of assembling an electronic device that allow easy part replacement and a long product life. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view of a keyboard instrument (electronic instrument) according to an embodiment of the present invention, as viewed from above. [Diagram 2]1 is a perspective view of a keyboard instrument (electronic instrument) according to an embodiment of the present invention, as viewed from below. [Diagram 3] 1 is an exploded perspective view of a keyboard instrument (electronic instrument) according to an embodiment of the present invention; [Figure 4] 1 is a perspective view of an upper case of a keyboard instrument (electronic instrument) according to an embodiment of the present invention, seen from below. [Diagram 5] 1 is a perspective view of a lower case of a keyboard instrument (electronic musical instrument) according to an embodiment of the present invention, as viewed from above. [Figure 6] 6 is a cross-sectional view of the keyboard instrument (electronic instrument) according to the embodiment of the present invention taken along line VI-VI in FIG. [Figure 7] 7 is a cross-sectional view taken along line VII-VII of FIG. 1 of the keyboard instrument (electronic instrument) according to the embodiment of the present invention. [Figure 8] 8 is a cross-sectional view of the keyboard instrument (electronic musical instrument) according to the embodiment of the present invention taken along line VIII-VIII in FIG. [Figure 9] 1 is a rear perspective view of a keyboard instrument (electronic musical instrument) according to an embodiment of the present invention, with functional units omitted. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A keyboard instrument 10 (electronic device, electronic musical instrument) shown in Figs. 1 to 3 includes an upper case 20 (first layer member) having a keyboard 5 (input device), a lower case 30 (second layer member), and a plurality of intermediate cases 100 (intermediate layer members) provided between the upper case 20 and the lower case 30 in a layered manner. The upper case 20, the lower case 30, and the plurality of intermediate cases 100 are arranged in layers. The keyboard 5 includes a plurality of white keys 3 and a plurality of black keys 4, and in this embodiment, the keyboard 5 has 36 keys.

[0012] The keyboard instrument 10 is provided with a functional unit 80 on the top surface of the uppermost intermediate case 100 (first intermediate case 110) on the rear side B of the upper case 20. As will be described later, the functional unit 80 is detachable from the keyboard instrument 10. The functional unit 80 may be a functional unit that performs a percussion function as shown in FIG. 1, or a function such as playing rhythmic music. The functional unit 80 has a USB (Universal Serial Bus) terminal 81 that can be inserted into and connected to the upper case 20.

[0013] In the following description, the front of the keys in the front-to-back direction FB of the keyboard 5 is referred to as the front side F, the back of the keys in the front-to-back direction FB is referred to as the back side B, the left as you face the keyboard 5 is referred to as the left side L, and the right as you face the keyboard 5 is referred to as the right side R. The keys on the keyboard 5 are arranged in the left-to-right direction LR. Also, in the up-down direction UL of the keyboard instrument 10, the top is referred to as the up side Up, and the bottom is referred to as the down side Lo.

[0014] The upper case 20 has an outer shape of a substantially long rectangular plate that is longer in the left-right direction LR than in the front-rear direction FB, and is provided in a substantially U-shape with the open side facing the front side F when viewed from the up-down direction UL. The substantially U-shaped open part of the upper case 20 is a keyboard arrangement section 21, and the keyboard 5 is arranged in the keyboard arrangement section 21. A plurality of grooves and a plurality of ridges that slope from the front left to the rear right are alternately provided on the upper surface of the upper case 20 as a decorative pattern. On the upper surface of the rear side B of the keyboard 5 of the upper case 20, a plurality of (seven) grooves are provided with operation buttons 23. The upper surface of each operation button 23 that is provided at an angle following the grooves is provided at substantially the same height as the upper surface of the ridge adjacent to the groove in which the operation button 23 is provided. The operation buttons 23 provided in each groove are assigned functions such as a power button and a tone selection button.

[0015] The left sleeve 22L on the left side L of the keyboard 5 in the upper case 20 is provided with a larger width in the left-right direction LR than the right sleeve 22R on the right side R of the keyboard 5, and is provided with a speaker hole 24 for emitting sound from a speaker 60 (see FIG. 3). The speaker 60 is attached to the inner surface of the upper case 20 corresponding to the speaker hole 24 using a screw (not shown). Through holes 25 (see also FIG. 7) are provided as fixing holes in the four corners of the upper case 20, and nuts 51 of a fixing member 50 described later are arranged therein.

[0016] As shown in Fig. 4, the upper case 20 is provided with a beam 26 having a substantially U-shaped cross section with its open side facing the lower side Lo, extending in the left-right direction LR of the keyboard arrangement section 21 below the keyboard 5. The beam 26 is provided with three substantially cylindrical supports 26a (see also Fig. 6) at predetermined intervals in the left-right direction LR from the bottom of the substantially U-shaped cross section toward the lower side Lo.

[0017] 6, a substrate 71 is provided on the upper surface of the beam 26. Although not shown, the substrate 71 is provided with a plurality of sound-producing switches corresponding to the switch press parts 3a of the white keys 3 and the switch press parts 4a of the black keys 4. When the corresponding sound-producing switches are pressed by the switch press parts 3a, 4a, a predetermined sound is produced.

[0018] Furthermore, a board 72 is provided on the underside of rear side B of keyboard arrangement section 21 of upper case 20. Although not shown, switches are arranged on board 72 in correspondence with the above-mentioned operation buttons 23. Furthermore, as shown in Fig. 4, a USB terminal insertion hole 73 into which a USB terminal 81 of functional unit 80 is inserted is provided on the rear surface of upper case 20, and USB terminal 81 of functional unit 80 is connected to a USB connection terminal provided on board 72 (see also Figs. 8 and 9).

[0019] As shown in Fig. 2, the lower case 30 has an outer shape like a generally long rectangular plate that is longer in the left-right direction LR than in the front-rear direction FB. The lower surface of the lower case 30 has a plurality of inclined grooves and a plurality of ridges alternately provided thereon, similar to the upper surface of the upper case 20. If the keyboard instrument 10 is turned over as shown in Fig. 2, these inclined grooves and ridges can be seen to be inclined in the same direction as the inclined grooves and ridges of the upper case 20.

[0020] A recess 31 is provided in the center of the lower case 30, recessed in the shape of a long rectangle in the left-right direction LR from the bottom surface of the lower case 30. The recess 31 protrudes from the inner surface of the lower case 30 shown in Fig. 5. A strip-shaped band 32 is inserted into the recess 31 that protrudes from the inner surface. In the recess 31 on the outer surface, the band 32 is exposed to the outer surface. The band 32 is made of a flexible resin material or the like.

[0021] The band 32 has long holes 32a at both ends in the left-right direction LR. On the other hand, two pins 30a are provided on the inner surface of the lower case 30, facing each other with the recess 31 in between. The long holes 32a of the band 32 engage with the pins 30a. The band 32 is held down by a non-opening area 155 between the left opening hole 154L and the right opening hole 154R of the intermediate case 100 (fifth intermediate case 150) that is placed on the lower case 30 so as not to fall off. The band 32 allows the user to hold the keyboard instrument 10 by bending the portion of the band 32 exposed in the recess 31 of the lower case 30 shown in FIG. 2 and inserting his / her hand into the band 32.

[0022] As shown in Fig. 2, through holes 35 are provided at the four corners of the lower case 30 as fixing holes. The screw members 52 of the fixing member 50 are inserted into the through holes 35. Also, as shown in Figs. 3 and 5, a main circuit board 74 is provided on the left side L of the band 32 on the inner surface of the lower case 30. Also, a battery box 33 that stores dry batteries that are the power source for the keyboard instrument 10 is provided on the right side R of the band 32 on the inner surface of the lower case 30. The keyboard instrument 10 operates by supplying power to the main circuit board 74 from the battery box 33.

[0023] As shown in Fig. 1 and Fig. 2, the keyboard instrument 10 includes five intermediate cases 100 arranged one on top of the other. As shown in Fig. 3, the intermediate cases 100 include, in order from the upper side Up, a first intermediate case 110, a second intermediate case 120, a third intermediate case 130, a fourth intermediate case 140, and a fifth intermediate case 150. The upper case 20 is disposed on the upper side Up of the first intermediate case 110, and the lower case 30 is disposed on the lower side Lo of the fifth intermediate case 150. Each intermediate case 100 is in the shape of a substantially rectangular plate that is long in the left-right direction LR. The outer dimensions of each intermediate case 100 are all the same.

[0024] Each intermediate case 100 is made of a wooden member. Specifically, the first intermediate case 110 and the fifth intermediate case 150 are made of medium density fiberboard (MDF), and the second intermediate case 120, the third intermediate case 130, and the fourth intermediate case 140 are made of cork. The first intermediate case 110 and the fifth intermediate case 150 made of MDF are provided with the same thickness, and the second intermediate case 120, the third intermediate case 130, and the fourth intermediate case 140 made of cork are provided with the same thickness. The first intermediate case 110 and the fifth intermediate case 150 are thicker than the second intermediate case 120, the third intermediate case 130, and the fourth intermediate case 140.

[0025] Further, gripping holes 111, 121, 131, 141, 151 for gripping are provided in the approximate center of the rear side B of each intermediate case 100 at a position not overlapping with the upper case 20 and the lower case 30 in a top view, and extend in the left-right direction LR in the shape of a long rectangle. Each intermediate case 100 is provided with a plurality of small holes 112, 122, 132, 142, 152, which are circular holes of the same diameter and extend through the left side L and right side R of the gripping holes 111-151. The plurality of small holes 112-152 are arranged in two rows and eight columns at a predetermined equal pitch on the left side L and right side R of each intermediate case 100.

[0026] Each intermediate case 100 is provided with fixing holes 113, 123, 133, 143, 153, which are four penetrating round holes of the same diameter, on the front side F of the gripping holes 111-151 and the small holes 112-152. In the first intermediate case 110-fourth intermediate case 140, large rectangular opening holes 114, 124, 134, 144 that are long in the left-right direction LR are provided on the front side F of the gripping holes 111-141 and the small holes 112-142, and the fixing holes 113-143 are disposed at the four corners on the outside of the opening holes 114-144. In the fifth intermediate case 150, a left opening hole 154L is provided on the left side L of the front side F of the gripping holes 151 and the small holes 152, and a right opening hole 154R is provided on the right side R. Two fixing holes 153 are disposed on the left side L outside the left opening hole 154L, and two fixing holes 153 are disposed on the right side R outside the right opening hole 154R.

[0027] The first intermediate case 110 to the fourth intermediate case 140 can be assembled without distinguishing between the front and back.

[0028] The openings 114-144 of the first intermediate case 110-fourth intermediate case 140 are provided with the same dimensions to correspond to the arrangement of the keyboard 5 and the speaker 60. The left opening 154L is provided with a size corresponding to exposing the main circuit board 74 provided in the lower case 30, and the right opening 154R is provided with a size corresponding to allowing the battery box 33 to be inserted therethrough.

[0029] In the keyboard instrument 10, the intermediate case 100 is provided with openings 114-144, thereby reducing the weight of each intermediate case 100. In other words, if the intermediate case 100 were made from a single plate, it would not only be time-consuming to machine the material but would also result in a thick component if complex recesses and holes had to be cut to form the internal structure. However, by stacking multiple intermediate cases 100 with large openings 114-144, it is possible to create a lightweight and thin intermediate case 100.

[0030] Moreover, the upper case 20 and the lower case 30 have substantially the same external dimensions. Specifically, as shown in Fig. 1 and Fig. 2, the dimension L20 of the upper case 20 in the front-to-rear direction FB is the same as the dimension L30 of the lower case 30 in the front-to-rear direction FB. Furthermore, the dimension W20 of the upper case 20 in the left-to-right direction LR is the same as the dimension W30 of the lower case 30 in the left-to-right direction LR. In the upper case 20, the tip of the front side F of the white key 3 is located at substantially the same position as or slightly behind B the tip of the front side F of the left sleeve portion 22L (right sleeve portion 22R) when viewed from the left-to-right direction LR (see Fig. 7).

[0031] On the other hand, as described above, each of the intermediate cases 100 (first intermediate case 110 to fifth intermediate case 150) is provided with the same outer shape (same outer dimensions) in a plate shape. The dimensions W20, W30 of the upper case 20 and the lower case 30 in the left-right direction LR are slightly smaller than the dimension W100 of each intermediate case 100 in the left-right direction LR, but the dimensions L20, L30 of the upper case 20 and the lower case 30 in the front-back direction FB are sufficiently smaller than the dimension L100 of each intermediate case 100 in the front-back direction FB. Therefore, the upper case 20 and the lower case 30 are provided with outer shapes smaller than each intermediate case 100. In other words, the outline of the outer shape of the upper case 20 and the lower case 30 is contained within the outline of the outer shapes of the multiple intermediate cases 100.

[0032] When the keyboard instrument 10 is assembled, the upper case 20 and the lower case 30 are located near the end of the front side F of each intermediate case 100. On the other hand, when the keyboard instrument 10 is assembled (i.e., when the intermediate cases 100 are stacked), the gripping holes 111-151 and the small holes 112-115 of each intermediate case 100 communicate with each other to form a gripping portion 101 (grip area) in the form of a rectangular through hole that is long in the left-right direction LR, and a small hole 102 (through hole, see FIG. 8) that is a circular through hole. The rear sides B of the first intermediate case 110 and the fifth intermediate case 150, where the gripping portion 101 and the small hole 102 are provided, are exposed to the outer surface of the keyboard instrument 10 and serve as an engagement area A1 where the functional unit 80 and the fixing device 83 are arranged.

[0033] When the keyboard instrument 10 is assembled, internal components (such as the main circuit board 74, the battery box 33, and wiring electrically connecting these) are arranged inside a space S1 (see Figures 6 to 8) formed by the openings 113-144, the left opening 154L, and the right opening 154R provided in each of the intermediate cases 100.

[0034] Here, as shown in Fig. 6, the gripping portion 101 is provided so that the cross section in the front-rear direction FB gradually expands from the center toward the outside (upper side Up and lower side Lo). That is, the gripping holes 111-151 of each intermediate case 100 are arranged concentrically, but the dimension in the front-rear direction FB of the gripping hole 131 of the third intermediate case 130 arranged in the center in the up-down direction UL is smaller than the dimensions in the front-rear direction FB of the gripping holes 121, 141 of the second intermediate case 120 and the fourth intermediate case 140 adjacent to each other in the up-down direction UL. The gripping hole 121 of the second intermediate case 120 is smaller than the gripping hole 111 of the first intermediate case 110 adjacent to the second intermediate case 120 on the upper side Up. Similarly, the gripping hole 141 of the fourth intermediate case 140 is smaller than the gripping hole 151 of the fifth intermediate case 150.

[0035] Focusing on the upper case 20 (first layer member), the first intermediate case 110 (first intermediate layer member), and the second intermediate case 120 (second intermediate layer member), the multiple intermediate cases 100 (intermediate layer members) include a first intermediate case 110 arranged one level below the upper case 20, and a second intermediate case 120 arranged one level below the first intermediate case 110, and the size of the gripping hole 111 (first gripping hole) provided in the first intermediate case 110 is larger than the size of the gripping hole 121 (second gripping hole) provided in the second intermediate case 120.

[0036] In addition, the dimensions in the front-to-back direction FB of the gripping hole 121 of the second intermediate case 120 and the gripping hole 141 of the fourth intermediate case 140 are the same, and the dimensions in the front-to-back direction FB of the gripping hole 111 of the first intermediate case 110 and the gripping hole 151 of the fifth intermediate case 151 are the same.

[0037] Thus, the grip portion 101 is provided in a stepped shape so as to expand from the center (third intermediate case 130) to the outside (upper side Up, lower side Lo), so that when a hand (four fingers other than the thumb) is inserted into the grip portion 101 and gripped, the expanding stepped grip portion 101 fits the bending of the finger joints, making it easy to grip, particularly at the rear side B of the grip portion 101. And the third intermediate case 130, second intermediate case 120, and fourth intermediate case 140, which place a load on the hand when the keyboard instrument 10 is gripped by the grip portion 101, are made of cork material, so they are easy to handle.

[0038] Therefore, it is sufficient that at least the rear side B of the gripping portion 101, which is shaped like a through hole, is arranged in a stepped manner, but by also arranging the front side F in a stepped manner, the risk of the hand directly hitting the first intermediate case 110 or the fifth intermediate case 150, which are made of hard MDF, when inserting the hand into the gripping portion 101 is reduced.

[0039] In this embodiment, although not shown, grip portion 101 is also formed in a stepped shape so as to expand outward from the center (grip hole 131 of third intermediate case 130) in a cross section in the left-right direction LR. As a result, grip portion 101 is formed in a stepped shape so as to expand outward from the center around the entire circumference, resulting in grip portion 101 that has a well-balanced appearance. Here, grip hole 111 of first intermediate case 110 and grip hole 151 of fifth intermediate case 150 are the same size, and grip hole 121 of second intermediate case 120 and grip hole 141 of fourth intermediate case 140 are formed to be the same size.

[0040] 2, a fixture 83 for fixing the functional unit (function expansion device) 80 is inserted into the small holes 102. The fixture 83 has four pins (through shafts 80a, see FIGS. 8 and 9) arranged in a square, and is inserted into the functional unit 80 through the four small holes 102 to fix the functional unit 80.

[0041] 8 and 9, the functional unit 80 is provided with four recesses 80a corresponding to the four small holes 102 in two rows and two columns. Meanwhile, the fixture 83 is provided with four through shafts 83a corresponding to the four small holes 102 in two rows and two columns. The four through shafts 83a are inserted into the four small holes 102 in two rows and two columns, respectively. The tip of each through shaft 83a fits into a washer member 80W provided in the recess 80a.

[0042] A magnet 83M is embedded in the tip of the through shaft 83a of the fixing device 83, and is attracted to the magnetic body 80M provided inside the functional unit 80, thereby fixing the functional unit 80 and the fixing device 83 to the engagement area A1 by sandwiching multiple intermediate cases 100.

[0043] In this way, by providing a plurality of small holes 102 in the engagement area A1, one or more functional units 80 can be arranged and fixed at any position in the engagement area A1. Furthermore, fixing the functional unit 80 can be easily performed by simply inserting the through shaft 83a of the fixture 83 into the small holes 102.

[0044] The keyboard instrument 10 is fixed by four fixing members 50 which are provided in common to the upper case 20, the lower case 30 and the multiple intermediate cases 100 and fix them to each other. The intermediate case 100 is fixed to the upper case 20 and the lower case 30 by the fixing members 50. As shown in FIG. 7, the fixing members 50 include a nut member 51, a screw member 52 and a spacer member 53. The nut member 51 has a large-diameter head 51a and a nut shaft 51b which protrudes cylindrically from the head 51a and has a female thread on the inner peripheral surface of the tip. A concave hexagonal hole 51c is provided on the side of the head 51a opposite to the nut shaft 51b.

[0045] The screw member 52 has a large-diameter head 52a and a shaft 52b with a male screw at the tip. The head 52a on the opposite side to the shaft 52b is provided with an installation member 52c made of a soft material such as rubber and adapted to come into contact with an installation surface. The spacer member 53 is provided in a cylindrical shape.

[0046] When the intermediate cases 100 are stacked, the four fixing holes 113 to 153 are concentrically arranged to form fixing holes 103. Spacer members 53 are inserted into these fixing holes 103. Here, the outer diameter of the spacer member 53 is set to be slightly larger than the hole diameter of the fixing holes 103, and therefore, by inserting the spacer member 53, each intermediate case 100 is fixed in the horizontal direction (a direction parallel to the plate surface of the intermediate case 100).

[0047] The through hole 25 as a fixing hole of the upper case 20 and the through hole 35 as a fixing hole of the lower case 30 are arranged so as to be concentric with the spacer member 53 (i.e., the fixing hole 103). Here, the through holes 25 and 35 are provided with countersunk portions 25a and 35a, respectively. The nut shaft 51b of the nut member 51 is inserted into the through hole 25 so that the head 51a is disposed in the countersunk portion 25a. Similarly, the shaft 52b of the screw member 52 is inserted into the through hole 35 so that the head 52a is disposed in the countersunk portion 35a. Then, the nut shaft 51b and the shaft 52b are inserted into the spacer member 53. Then, by screwing the female threaded portion of the nut shaft 51b into the male threaded portion of the shaft 52b and inserting a hexagonal wrench into the hexagonal hole 51c of the nut member 51 and tightening it, the spacer member 53 is clamped between the upper case 20 and the lower case 30, and the upper case 20 and the lower case 30 press and fix the stacked intermediate case 100 from the vertical direction UL.

[0048] More specifically, a step 27 on the underside of the front side F of the upper case 20 corresponding to the keyboard arrangement section 21 and a bottom edge 28 provided on the outer periphery excluding the keyboard arrangement section 21 abut against the top surface of the first intermediate case 110 (see FIGS. 4 and 6). Note that a bottom edge 27a of the step 27 abuts against the top surface of the second intermediate case 120 (the top surface of the front side F of the opening 124) through the opening 114 of the first intermediate case 110.

[0049] Meanwhile, the upper edge 38 of the outer periphery of the lower case 30 abuts against the lower surface of the fifth intermediate case 150. In this manner, the multiple intermediate cases 100 are sandwiched and fixed by the lower edge 28 of the upper case 20, the step portion 27, and the upper edge 38 of the lower case 30.

[0050] In this embodiment, the shaft 52b of the screw member 52 and the nut shaft 51b of the nut member 51 are inserted into the spacer member 53, but if the nut member 51 is a hexagonal nut or the like, the spacer member 53 only needs to be cylindrical enough to allow at least the shaft 52b of the screw member 52 to be inserted therethrough.

[0051] In this embodiment, the space between the upper case 20 and the lower case 30 in the up-down direction UL is determined by a spacer member 53 made of a hard resin material or the like. On the other hand, since each intermediate case 100 is made of a wooden member, it is prone to dimensional changes due to temperature and humidity. The dimensional changes of each intermediate case 100 due to environmental changes are greater than those of the spacer member 53. Therefore, if the space between the upper case 20 and the lower case 30 in the up-down direction UL (i.e., the length of the spacer member 53) is set in consideration of the dimensional changes of each intermediate case 100, it is possible to reduce the occurrence of cracks or large gaps even if each intermediate case 100 expands and contracts due to environmental changes.

[0052] In addition, when each intermediate case 100 is sandwiched between the upper case 20 and the lower case 30, the tip of the support pillar 26a of the beam 26 of the upper case 20 abuts against the upper surface of the fifth intermediate case 150, as shown in Fig. 6. This allows the beam 26 to be supported by the support pillar 26a even if a force on the lower side Lo is applied to the beam 26 by pressing the key 5 (switch pressing parts 3a, 4a).

[0053] The method of assembling the keyboard instrument 10 is as follows. First step: The screw member 52 of the fixing member 50 is inserted into the through hole 35 (second fixing hole) of the lower case 30 (second layer member), and the spacer member 53 is attached to the shaft 52b of the screw member 52, and the device is placed on a desk or the like.

[0054] Second step: Starting from the fifth intermediate case 150 which is located one above the lower case 30, multiple intermediate cases 100 are stacked on top of the lower case 30 by inserting spacer members 53 through the fixing holes 103 (fixing holes 113 to 153, intermediate fixing holes) of each intermediate case 100.

[0055] Third step: The upper case 20 is placed on the upper side of the first intermediate case 110, and the nut member 51 of the fixing member 50 is placed in the through hole 25 (first fixing hole) and screwed into the screw member 52, i.e., the lower case 30, the multiple intermediate cases 100 and the upper case 20 are fixed at the position of the through hole 25.

[0056] Here, the keyboard 5 and the speaker 60 can be set in advance in the upper case 20. In the third step, wiring can be performed between the boards 71 ​​and 72 of the upper case 20 and the main circuit board 74 and the battery box 33 before placing the upper case 20 above the first intermediate case 110. In this manner, the keyboard instrument 10 can be easily assembled.

[0057] As described above, according to an embodiment of the present invention, a keyboard instrument 10 as an electronic device comprises an upper case 20 as a first layer member in which a keyboard 5 as an input device is provided, a lower case 30 as a second layer member, a plurality of intermediate cases 100 as a plurality of intermediate layer members which are overlapped between the upper case 20 and the lower case 30 and have opening holes including opening holes 114-144, a left opening hole 154L and a right opening hole 154R inside the keyboard instrument 10, and internal components which are disposed inside a space S1 formed by the opening holes provided in each of the plurality of intermediate cases 100.

[0058] As a result, even if any of the multiple intermediate cases 100 becomes dirty or damaged, the dirty or damaged intermediate case 100 can be replaced, making it possible to provide a keyboard instrument 10 as an electronic device that can be used for a long period of time. In this embodiment, the keyboard instrument 10 is exemplified as the electronic device (electronic musical instrument) and the keyboard 5 is used as the input device, but other electronic devices (electronic musical instruments) may also be used, or an input device (such as a keyboard or touch panel) used in other electronic devices (electronic musical instruments). In this embodiment, the internal components are the main circuit board 74, the battery box 33, and wiring that electrically connects these, but may also include boards and power sources in the electronic device.

[0059] Further, the multiple intermediate cases 100 each have a fixing hole 103 (fixing holes 113-153) on the outside of the openings 114, etc., and have fixing members 50 that are inserted into the fixing holes 103 to fix the upper case 20, the lower case 30, and the multiple intermediate cases 100 to one another on the outside of the openings 114, etc. This allows the keyboard instrument 10 to be easily disassembled and assembled.

[0060] Moreover, the fixing member 50 includes a spacer member 53 that is inserted through the multiple intermediate cases 100. This allows the intermediate case 100 to be prevented from being too tightly sandwiched between the upper case 20 and the lower case 30 even if the intermediate case 100 is made of a wooden member, and also allows the keyboard instrument 10 to be easily positioned in the horizontal direction.

[0061] Additionally, the outer size of the upper case 20 and the lower case 30 in top view is smaller than that of the multiple intermediate cases 100, and the multiple intermediate cases 100 each have gripping holes 111-151 for gripping at positions that do not overlap with the upper case 20 and the lower case 30 in top view. This makes it possible to provide a keyboard instrument 10 that is easy to carry.

[0062] Furthermore, the multiple intermediate cases 100 include a first intermediate case 110 as a first intermediate layer member arranged one layer below the upper case 20, and a second intermediate case 120 as a second intermediate layer member arranged one layer below the first intermediate case, and the size of gripping hole 111 as a first gripping hole provided in the first intermediate case is larger than the size of gripping hole 121 as a second gripping hole provided in the second intermediate case 120. This allows gripping portion 101 to be stepped so as to widen outward, and a shape that fits comfortably in the hand holding it.

[0063] In addition, the size of the outer shape of the upper case 20 and the lower case 30 in a top view is smaller than that of the intermediate cases 100, and the contours of the outer shapes of the upper case 20 and the lower case 30 are contained within the contours of the outer shapes of the intermediate cases 100. As a result, the outer circumferences of the upper case 20 and the lower case 30, which are the first and second layer members made of resin, are smaller than the outer circumference of the intermediate case 100, which is the intermediate layer member. In other words, the outer circumferences of the upper case 20 and the lower case 30 can be provided so as not to protrude from the outer circumference of the intermediate case 100. Therefore, for example, even if a child swings the keyboard instrument 10 around when carrying it and the outer circumference of the keyboard instrument 10 hits a wall or the like, the intermediate case 100 is likely to hit, but the upper case 20 and the lower case 30 are unlikely to hit. Therefore, the risk of damage to the upper case 20 and the lower case 30 is reduced. Even if the intermediate case 100 is damaged, the intermediate case 100 can be easily replaced, so the keyboard instrument 10 can be used for a long period of time.

[0064] Moreover, the keyboard instrument 10 as an electronic musical instrument includes an upper case 20 as a first layer member on which the keyboard 5 is provided, a lower case 30 as a second layer member, and intermediate cases 100 as a plurality of intermediate layer members provided between the upper case 20 and the lower case 30 and each having an opening 114 etc. therein. By replacing the intermediate case 100, it is possible to provide the keyboard instrument 10 as an electronic musical instrument that can be used for a long period of time.

[0065] In addition, a method for assembling a keyboard instrument 10 as an electronic device includes an upper case 20 as a first layer member, a lower case 30 as a second layer member, and multiple intermediate cases 100 as intermediate layer members having an outer size larger than the upper case 20 and the lower case 30, the method includes a first step of inserting a fixing member 50 into the lower case 30 having a through hole 35 as a second fixing hole, a second step of stacking the multiple intermediate cases 100 on top of the lower case 30 by inserting the fixing member 50 into fixing holes 113-153 (fixing hole 103), which are intermediate fixing holes provided outside the opening holes 114, etc. in the multiple intermediate cases 100 each having an opening hole 114, etc., and a third step of placing an upper case 20 having a through hole 25 as a first fixing hole including an input device on top of the multiple intermediate cases 100, and fixing the lower case 30, the multiple intermediate cases 100 and the upper case 20 at the position of the through hole 25. This makes it possible to provide a method for assembling the keyboard instrument 10 as an electronic device that can be used for a long period of time by simply replacing the intermediate case 100.

[0066] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims.

[0067] The invention described in the first claim of this application is set forth below. [1] A first layer member on which an input device is provided; A second layer member; a plurality of intermediate layer members provided between the first layer member and the second layer member and each having an opening therein; an internal component disposed within a space formed by the opening holes provided in each of the intermediate layer members; An electronic device comprising: [2] The intermediate layer members each have a fixing hole on the outer side of the opening hole, a fixing member that is inserted into the fixing hole to fix the first layer member, the second layer member, and the plurality of intermediate layer members to each other outside the opening hole; 2. The electronic device described in [1] above. [3] The fixing member includes a spacer member inserted through the plurality of intermediate layer members. The electronic device described in [2] above. [4] The outer size of the first layer member and the second layer member in a top view is smaller than that of the plurality of intermediate layer members; The plurality of intermediate layer members each include a gripping hole for gripping at a position not overlapping with the first layer member and the second layer member in a top view. 2. The electronic device described in [1] above. [5] The plurality of intermediate layer members include a first intermediate layer member disposed one layer below the first layer member, and a second intermediate layer member disposed one layer below the first intermediate layer member, and a size of a first gripping hole provided in the first intermediate layer member is larger than a size of a second gripping hole provided in the second intermediate layer member. 2. The electronic device according to claim 1 , [6] The outer size of the first layer member and the second layer member in a top view is smaller than that of the plurality of intermediate layer members; The outlines of the first layer member and the second layer member are contained within the outlines of the intermediate layer members. 2. The electronic device described in [1] above. [7] A first layer member on which a keyboard is provided; A second layer member; a plurality of intermediate layer members provided between the first layer member and the second layer member and each having an opening therein; An electronic musical instrument comprising: [8] A method for assembling an electronic device comprising a first layer member, a second layer member, and a plurality of intermediate layer members each having an outer size larger than the first layer member and the second layer member, comprising the steps of: a first step of inserting a fixing member through the second layer member having a second fixing hole; a second step of stacking the plurality of intermediate layer members on the second layer member by inserting the fixing members through intermediate fixing holes provided outside the openings of the plurality of intermediate layer members, each of which has an opening; a third step of arranging the first layer member having a first fixing hole including an input device on the upper side of the plurality of intermediate layer members, and fixing the second layer member, the plurality of intermediate layer members, and the first layer member at the position of the first fixing hole; A method for assembling an electronic device having the above structure. [Explanation of symbols]

[0068] 3 White key 3a Switch press part 4 Black keys 4a Switch press section 5 keys 10 keys 20 Upper case 21 Keyboard arrangement section 22L Left sleeve 22R Right sleeve 23 Operation button 24 Speaker hole 25 Through hole 25a Countersunk part 26 Beam 26a Post 30 Lower case 30a pin 31 recess 32 band 32a Long hole 33 Battery box 35 Through hole 35a Countersunk part 50 Fixing member 51 Nut member 51a Head 51b Nut shaft 51c Hexagonal hole 52 Screw member 52a Head 52b Axis 52c Installation member 53 Spacer member 60 Speaker 71 Circuit board 72 Board 73 USB terminal insertion hole 74 main circuit board 80 functional unit 80a recess 80M magnetic material 80W washer parts 81 USB terminal 83 Fixture 83a Through shaft 83M Magnet 100 Intermediate case 101 Grip portion 102 Small hole 103 Fixed hole 110 1st intermediate case 120 2nd intermediate case 130 3rd intermediate case 140 4th intermediate case 150 5th intermediate case 111,121,131,141,151 Gripping hole 112,122,132,142,152 small hole 113,123,133,143,153 Fixed hole 114,124,134,144 Opening hole 154L Left opening hole 154R Right opening hole

Claims

1. a first layer member on which an input device is provided; A second layer member; a plurality of intermediate layer members provided between the first layer member and the second layer member and each having an opening therein; an internal component disposed within a space formed by the opening holes provided in each of the intermediate layer members; An electronic device comprising:

2. The intermediate layer members each have a fixing hole on the outer side of the opening hole, a fixing member that is inserted into the fixing hole to fix the first layer member, the second layer member, and the plurality of intermediate layer members to each other outside the opening hole; 2. The electronic device according to claim 1.

3. The fixing member includes a spacer member inserted through the plurality of intermediate layer members.

3. The electronic device according to claim 2.

4. an outer size of the first layer member and the second layer member in a top view is smaller than an outer size of the plurality of intermediate layer members; The plurality of intermediate layer members each include a gripping hole for gripping at a position not overlapping with the first layer member and the second layer member in a top view.

2. The electronic device according to claim 1.

5. The plurality of intermediate layer members include a first intermediate layer member disposed one layer below the first layer member, and a second intermediate layer member disposed one layer below the first intermediate layer member, and a size of a first gripping hole provided in the first intermediate layer member is larger than a size of a second gripping hole provided in the second intermediate layer member.

5. The electronic device according to claim 4.

6. an outer size of the first layer member and the second layer member in a top view is smaller than an outer size of the plurality of intermediate layer members; The outlines of the first layer member and the second layer member are contained within the outlines of the intermediate layer members.

2. The electronic device according to claim 1.

7. a first layer member on which a keyboard is provided; A second layer member; a plurality of intermediate layer members provided between the first layer member and the second layer member and each having an opening therein; An electronic musical instrument comprising:

8. 1. A method for assembling an electronic device comprising: a first layer member; a second layer member; and a plurality of intermediate layer members each having an outer size larger than the first layer member and the second layer member, the method comprising the steps of: a first step of inserting a fixing member through the second layer member having a second fixing hole; a second step of stacking the plurality of intermediate layer members on the second layer member by inserting the fixing members through intermediate fixing holes provided outside the openings of the plurality of intermediate layer members, each of the intermediate layer members having an opening; a third step of arranging the first layer member having a first fixing hole including an input device on the upper side of the plurality of intermediate layer members, and fixing the second layer member, the plurality of intermediate layer members, and the first layer member at the position of the first fixing hole; A method for assembling an electronic device having the above structure.

Images