JP4023466B2 - Electronic keyboard instrument - Google Patents

Description

  The present invention relates to a housing structure for an electronic keyboard instrument.

In an electronic keyboard instrument having a flat board-like casing as a whole, the casing structure includes a bottom plate portion on which the keyboard portion is placed, a mouth bar portion located in front of the keyboard portion, and left and right sides of the keyboard portion. It is composed of left and right side plate parts located on the side, a roof plate part constituting the rear upper surface, and a back plate part. Generally, these plate parts are connected to each other via screws or the like to form a case. Is formed. However, in such a case configuration, the disassembly and reassembly work of the case when performing maintenance and inspection inside the case is troublesome.
On the other hand, in the following Patent Document 1, a casing of an electronic keyboard instrument is configured by a rear cover and a main body unit in which an upper surface part and a rear surface part are integrated, and the rear cover is provided with respect to a bottom plate part provided in the main body part. A combination of hinges to allow the rear cover to be opened and closed is shown. However, in this case, when assembling the casing, the final screw tightening for fixing the rear cover to the main body is always performed on the upper surface side of the casing. It was not preferable. Further, since the rear cover is not detachable from the housing main body, it is troublesome to assemble, and maintenance and inspection of the circuit board and the like inside the housing are difficult.
Japanese Utility Model Publication No. 62-103382

  In the electronic keyboard instrument of the above-described type, the main circuit board is disposed on the bottom plate in consideration of ease of maintenance and inspection. However, when the main circuit board is provided on the bottom plate portion behind the keyboard portion, the size of the bottom plate portion in the front-rear direction must be increased, and the size of the musical instrument in the front-rear direction is increased. Further, when the main circuit board is provided on the bottom plate part below the keyboard part, the thickness of the instrument in the vertical direction increases.

  The present invention has been made in view of the above points, and provides an electronic keyboard instrument having a casing structure that can be easily and easily assembled and can be easily maintained and inspected for circuit boards and the like inside the casing. It is something to try.

The present invention relates to an electronic keyboard instrument comprising a keyboard portion and a housing in which the keyboard portion is disposed, wherein the housing includes a bottom plate portion, a side plate portion, a back plate portion, and a roof plate portion, and the bottom plate The keyboard part is placed on the part, and the second casing part including at least the roof panel part and the back panel part is completely separated from the first casing part including at least the bottom plate part. The side plate part belongs to either the first or second casing part, and the circuit board of the panel part and the main circuit board of the electronic keyboard instrument are further connected to the second casing. The second housing part is detachable together with each circuit board so as to be completely separated from the first housing part, and The second housing portion has a shape that extends forward from the back plate portion. The coupling holding plate has a structure in which an upper side thereof is in contact with the roof plate part and a lower side thereof is in contact with the bottom plate part, and the main circuit board is positioned on the left and right sides of the coupling holding plate. It is divided into parts and arranged on the back plate part side. According to this, the housing is divided into two parts, a first housing part and a second housing part, and the side plate part is assigned to either the first or second housing part, and The circuit board of the panel unit and the main circuit board of the electronic keyboard instrument are arranged so as to belong to the second housing part side, and the second housing part together with each circuit board is separated from the first housing part. Since it is detachable so as to be completely separated, the case can be easily assembled and / or disassembled, and the circuit board inside the case can be easily maintained and inspected. There is an excellent effect that workability is improved. Further, it is possible to obtain the effect of reinforcing the casing by the coupling holding plate provided in the second casing portion, and the main circuit board is separated into two parts so as to be positioned on the left and right of the coupling holding plate. Thus, the configuration arranged on the back plate portion side has an excellent effect that the size of each circuit board is reduced, and maintenance and inspection such as replacement of the circuit board can be easily performed. In addition, such a reduction in the size of the circuit board reduces problems of bending and warping due to the weight of the circuit board .

Further, the present invention provides an electronic keyboard instrument comprising a keyboard section and a casing in which the keyboard section is disposed, wherein the casing is disposed in front of the keyboard section and a bottom plate section on which the keyboard section is placed. It is composed of a mouth stick portion that rises from the bottom plate portion, side plate portions that are located on the left and right sides of the keyboard portion, a roof plate portion that constitutes an upper surface, and a back plate portion that is provided at the rear of the roof plate portion, The casing can be divided into a first casing portion including the bottom plate portion and the mouth bar portion, and a second casing portion including at least the back plate portion, and the first casing portion. It is detachable so as to completely separate the second casing part from the casing part, the side plate part belongs to either the first or second casing part, and the circuit of the panel part A board and a main circuit board of the electronic keyboard instrument are arranged to belong to the side of the second casing portion; Thus, the second casing portion can be attached and detached together with the circuit boards so as to be completely separated from the first casing portion. Further, the second casing portion can be attached to the back plate portion. A joint holding plate having a shape extending forward from the top, the joint holding plate having a structure in which an upper side thereof is in contact with the roof plate part and a lower side thereof is in contact with the bottom plate part, and the main circuit board is It is separated into two parts so as to be located on the left and right of the coupling holding plate, and is arranged on the side of the back plate part. Also in this case, the housing is divided into two parts, a first housing part and a second housing part, and the side plate part is attributed to either the first or second housing part, The circuit board of the panel portion and the main circuit board of the electronic keyboard instrument are assigned to the second casing portion side and are arranged on the second casing portion side, and the second casing portion is arranged on each circuit board. In addition, since it is detachable so as to be completely separated from the first casing portion, the casing can be easily assembled and / or disassembled, and the maintenance and inspection of the circuit board inside the casing is also extremely performed. This makes it easy to maintain and improve workability during maintenance and inspection. Similarly to the above, it is possible to obtain the effect of reinforcing the housing by the coupling holding plate provided in the second housing portion, and to make the main circuit board 2 located on the left and right of the coupling holding plate. The configuration in which the circuit board is separated into two parts and disposed on the back plate portion side reduces the size of each circuit board, and facilitates maintenance and inspection such as replacement of the circuit board .

An embodiment of the present invention will be described below with reference to the accompanying drawings.
FIG. 1A is a plan view showing an example of an electronic keyboard instrument according to the present invention. FIG. 1B is a rear view thereof, and FIG. 1C is a bottom view thereof. The casing 1 of the electronic keyboard instrument according to the present embodiment is roughly divided into a casing main body 2 (first casing portion) and a casing rear portion 3 (second casing portion). As shown schematically, the housing rear portion 3 is detachably attached to the housing body 2. The main body 2 includes a bottom plate portion 5 on which the keyboard portion 9 is placed, a mouth bar portion 8 that rises from the bottom plate portion 5 in front of the keyboard portion 9, and left and right portions that rise from the bottom plate portion 5 on the left and right sides of the keyboard portion 9. The bottom plate portion 5, the side plate portions 6a, 6b, and the mouth bar portion 8 are fixed to each other via appropriate connecting means such as screws. The housing rear portion 3 includes a roof plate portion 4 constituting the rear upper surface of the housing 1 and a back plate portion 7 falling from the rear edge of the roof plate portion 4. The roof plate portion 4 and the back plate portion 7 are screwed. These are fixedly bonded to each other through appropriate bonding means. As shown in FIG. 1B, the back plate portion 7 is provided with main tone holes 10a, 10b, which are sound output ports for sound output from both left and right speakers (not shown). As shown in FIG. 1A, an operation including subtone holes 11a and 11b, which are openings for emitting acoustic vibration from the back surface of the speaker, various operation switches, a display, and the like are provided at predetermined locations on the roof plate portion 4. A panel 12 is provided.

  Attachment of the housing rear portion 3 to the housing main body portion 2 is performed via a slide fixing means for slidingly fixing the housing rear portion 3 to the housing main body portion 2. In the embodiment described first, the mechanism constituting the slide fixing means is provided on the lower surface of the roof plate portion 4 in the housing rear portion 3, and the upper end portions of the left and right side plate portions 6 a and 6 b in the housing body portion 2. Accordingly, the slide fixing means is configured to slide and fix the housing rear portion 3 to the left and right side plate portions 6 a and 6 b of the housing main body portion 2.

  First, a specific example of the housing rear portion 3 will be described with reference to FIGS. (A) is an elevational view of the housing rear part 3 when the back surface of the back plate part 7 is viewed from the inside of the housing 1, and (b) is an arrow from the arrow a in FIG. It is the figure seen, (c) is the right view which looked at the side surface of the housing | casing rear part 3 from the arrow b of Fig.3 (a). The roof plate portion 4 and the back plate portion 7 constituting the housing rear portion 3 are coupled at a substantially right angle, and the coupling between the two is reinforced through the coupling holding plates 21a to 21c at the three positions of the left and right and the center. Yes. Referring to FIG. 3 (c), the right side of the holding plate 21a is connected to the back plate 7 at the rear end, and is connected to the roof plate 4 at the upper end, and the lower end 53a is perpendicular to the holding plate 21a. This is a bent portion continuously provided from the portion, and can be coupled to the bottom plate portion 5 via a screw or the like as will be described later. The other coupling holding plates 21b and 21c are similarly configured. As shown in FIG. 3A, speakers 20a and 2b are provided at predetermined positions near the left and right ends of the back plate portion 7, respectively. The central coupling holding plate 21c also plays a role of acoustic separation between the left and right speakers 20a, 20b. Further, the lower edge portion 51 of the back plate portion 7 is bent in a substantially horizontal direction toward the inside, and is joined to one edge of the bottom plate portion 5 via a screw or the like as will be described later.

  As shown in FIG. 3 (b), slide fixing means for slidingly fixing the housing rear portion 3 to the left and right side plate portions 6a and 6b is provided at predetermined positions near the left and right ends of the back surface of the roof plate portion 4. As one component, projections 31a to 31d are provided, respectively. The slide fixing projections 31a and 31b provided at the right end of the back surface of the roof plate 4 will be described with reference to FIG. 3C. These are provided at predetermined positions near the front and rear, respectively. Screw heads 33a and 33b are formed at the tip portions of the protrusions 31a and 31b, and flange portions 34a and 34b are provided at predetermined intervals from the screw heads 33a and 33b. Sliding gaps 32a and 32b are formed between 33a and 33b and the flanges 34a and 34b. The slide fixing projections 31c and 31d provided at the left end of the back surface of the roof plate 4 have the same configuration.

  Next, an example of the constituent elements of the slide fixing means provided on the left and right side plate portions 6a and 6b of the housing body 2 will be described with reference to FIGS. FIG. 4 is a top view of the housing body 2, and FIG. 5A is an enlarged view of the top surface of the right side plate 6 a. Slide portions 35 a to 35 d are respectively provided on the rear upper surfaces of the left and right side plate portions 6 a and 6 b of the housing main body 2 in an arrangement corresponding to the slide fixing protrusions 31 a to 31 d of the housing rear portion 3. As shown in FIG. 5 (a), each slide portion 35a, 35b includes a large hole portion 36a, 36b, and a long hole portion 37a, 37b extending to the front of the housing that is connected to the large hole portion 36a, 36b. The recesses 38a and 38b are formed around the periphery. The large hole portions 36a, 36b have a diameter that allows the screw heads 33a, 33b of the corresponding slide fixing projections 31a, 31b to be inserted, and the widths of the long hole portions 37a, 37b are the screw heads 33a, 33b. And smaller than the diameter of the flange portions 34a, 34b. The concave portions 38a and 38b are concave portions into which the flange portions 34a and 34b of the corresponding slide fixing projection portions 31a and 31b are fitted when the housing rear portion 3 and the housing main body portion 2 are coupled to each other. , 34b with a width and depth that fit. As will be described later, a tapered surface (39a in FIG. 5B) is formed in a predetermined range on the back surface of the recesses 38a and 38b. The other slide portions 35c and 35d have the same structure.

  In order to attach the housing rear portion 3 to the housing main body portion 2, as shown in FIG. 2, the housing rear portion 3 is installed from behind the housing main portion 2, and the slide fixing protrusion on the lower surface of the roof plate portion 4. The screw heads 33a, 33b, ... of 31a to 31d are dropped into the corresponding large holes 36a, 36b, ... of the slide parts 35a to 35d of the left and right side plate parts 6a, 6b, and then the entire rear part 3 of the casing is moved forward (arrow X Slide in the direction). FIG. 5B is a cross-sectional view taken along the line GG in FIG. 5A, and shows a state in which the protrusion 31a corresponding to the slide part 35a is dropped. In this state, the flange portions 34a, 34b,... Of the projections 31a to 31d are located in the corresponding recesses 38a, 38b,... In the slide portions 35a to 35d, and the gap portions 32a, 32b,. Is located at the height of the corresponding large hole portions 36a, 36b,... In the slide portions 35a to 35d, and the screw heads 33a, 33b,... Of the projection portions 31a to 31d are the corresponding large hole portions 36a, 36b,. Protrude below. When the casing rear portion 3 (the roof plate portion 4 in FIG. 5B) is slid forward, that is, in the direction of the arrow X from this state, the gap portions 32a, 32b,... Of the projections 31a to 31d are slid portions 35a to 35d. Can be moved forward by being guided by the corresponding long hole portions 37 a, 37 b,..., Whereby the housing rear portion 3 slides forward and is attached to the housing main body portion 2.

  .. Are formed in predetermined ranges on the back surfaces of the recesses 38a, 38b,... In the slide portions 35a to 35d. The taper surface 39a... Is inclined downward toward the front of the instrument, and the slide portions 35a to 35d gradually increase in thickness as the taper surface 39a. In the tapered surfaces 39a,..., The plate thickness of each of the slide portions 35a to 35d is gradually thicker than the width of the gap portions 32a, 32b,. For this reason, at the slide completion position of the housing rear portion 3 (that is, the mounting position of the housing rear portion 3), at the gap portions 32a, 32b,..., That is, the screw heads 33a, 33b,. Between, the slide parts 35a-35d corresponding to each are tightly pinched. That is, the screw heads 33a, 33b,... That have fully climbed the tapered surfaces 39a,... Are pushed down by the thickness of the slide portions 35a to 35d, so that the roof plate 4 is strongly pressed and fixed to the left and right side plates 6a, 6b. The In this way, the housing rear portion 3 is slid forward and fixed to the side plate portions 6 a and 6 b, and is attached to the housing main body portion 2.

  As shown in FIG. 5B, adjuster protrusions 40a,... Are provided at the rear ends of the back surfaces of the slide portions 35a to 35d, respectively. The adjuster protrusions 40a,... Are provided immediately after the large holes 36a, 36b,... Of the slide portions 35a-35d, and when the rear case 3 is slid rearward to be removed from the main body 2. The screw heads 33a, 33b,... Of the slide fixing projections 31a to 31d are stopped by the corresponding adjuster projections 40a,. The adjuster protrusions 40a,... Allow the screw heads 33a, 33b,... Of the slide fixing protrusions 31a to 31d to be positioned below the corresponding large holes 36a, 36b,. Therefore, the operation of removing the housing rear portion 3 from the housing body portion 2 can be performed smoothly.

  In addition to the coupling by the above-mentioned slide fixing means, the casing main body 2 and the casing rear part 3 are further combined at the bottom plate part 5 and the rear lower end of the casing rear part 3 as described below. The bond is made stronger and more secure.

  As shown in FIG. 3C, the lower edge portion 51 of the back plate portion 7 is bent inward in a substantially horizontal direction, and the lower edge portion 51 is provided with screw holes 52a to 52f. . The lower end portions 53a to 53c (see FIG. 3A) of the coupling holding plates 21a to 21c are also bent portions, and screw holes 54a to 54c are provided in the respective lower end portions 53a to 53c. The lower edge portion 51 of the back plate portion 7 is located at the height position of the lower surface of the bottom plate portion 5, and the lower end portions 53 a to 53 c of the coupling holding plates 21 a to 21 c are located at the height position of the upper surface of the bottom plate portion 5. The bottom plate portion 5 is sandwiched between the lower edge portion 51 and the lower end portions 53a to 53c. When the rear housing part 3 is slidably mounted on the main body part 2, the rear edge part of the bottom plate part 5 is inserted between the lower edge part 51 and the lower end parts 53a to 53c. The lower edge portion 51 of the back plate portion 7 is in contact with the lower surface side of the bottom plate portion 5 and is screwed to the bottom plate portion 5 through the screw holes 52a to 52f. The lower end portions 53a to 53c of the coupling holding plates 21a to 21c are in contact with the upper surface side of the bottom plate portion 5, and are screwed to the bottom plate portion 5 through screw holes 54a to 54c, respectively. This screwing is all done from the bottom surface of the bottom plate portion 5 as shown in FIG. A plurality of screws are fixed at the lower edge portion 51 of the back plate portion 7 and the lower end portions 53a to 53c of the coupling holding plates 21a to 21c, and the screwing positions of the lower edge portion 51 and the lower end portions 53a to 53c are Since it is displaced in the front-rear direction, the housing rear portion 3 fixed to the housing body 2 is less likely to rattle in the front-rear direction.

  In order to remove the housing rear portion 3 from the housing main body portion 2, screws attached to the lower surface of the bottom plate portion 5 are removed, and the housing rear portion 3 is slid rearward (in the direction opposite to the arrow X). As a result, the engagement / fixation between the projecting portions 31a to 31d of the housing rear portion 3 and the tapered surfaces 39a of the slide portions 35a to 35d is released. The screw heads 33a, 33b,... Of the protrusions 31a to 31d are stopped by adjuster protrusions 40a provided on the slide portions 35a to 35d, and positions below the corresponding large hole portions 36a, 36b,. Then, it can move upward through the large holes 36a, 36b,. Therefore, the housing rear portion 3 can be easily detached from the housing main body portion 2 by lifting the housing rear portion 3 at the rear slide stop position.

Returning to FIG. 3, main circuit boards 22 a and 22 b including a sound source and the like are disposed on the back plate portion 7 (see FIG. 3A), and a portion of the back surface of the roof plate portion 4 that is below the operation panel 12. In addition, a panel circuit board 60 is disposed (see FIG. 3B). Thus, by arranging the circuit board on the side of the housing rear portion 3, the circuit board can be attached to and detached from the housing body portion 2 together with the housing rear portion 3. Therefore, when performing maintenance work on the circuit board or the like in the housing 1, the housing rear portion 3 is slid rearward from the housing main body portion 2 to be removed, and the housing rear portion 3 is placed in an easy-to-work state. Thus, maintenance work for the main circuit boards 22a, 22b, etc. may be performed, so that maintenance inspection work is easy to perform. Further, since it is not necessary to provide a space for disposing the main circuit boards 22a, 22b and the like in the bottom plate portion 5, the size of the bottom plate portion 5 in the front-rear direction can be reduced, thereby reducing the instrument size and the instrument weight. it can.
In the above-described embodiment, the left and right side plate portions 6a and 6b belong to the housing body portion 2 and are provided integrally therewith. However, the left and right side plate portions 6a and 6b belong to the case rear portion 3 and are integrated therewith. You may make it provide. Even in this case, it is possible to reflect the technical idea of the present invention in which the housing rear portion 3 is attached to and detached from the housing main body portion 2 from behind. In this case, of course, the roof plate portion 4 and the side plate portions 6a and 6b are integrally formed from the back surface (inner side) via the L-shaped metal fittings. The fitting is simply a butting structure. That is, it is only necessary to finish the both ends of the mouth bar portion 8 so that the front inner edges of the left and right side plate portions 6a and 6b slide forward to overlap and touch lightly. The mouth bar portion 8 and the bottom plate portion 5 are joined by a simplified fitting or L-shaped fitting with the above-described coupling holding plates 21a to 21c being made smaller.

In the above example, the rear lower end portion of the housing rear portion 3 and the housing main body portion 2 are fixed by screwing. However, as another embodiment, screwing is used as shown in FIG. Instead, it may be performed by elastic deformation fitting means (Patchon fitting means). FIG. 6A is a schematic perspective view of a part of the bottom plate part 5 and the back plate part 7 as seen from the lower surface. For convenience of explanation, only a part of each left end part is shown and the others are represented. In the figure, a fitting projection 61 is provided on the lower edge portion 51 of the back plate portion 7 so as to protrude upward through a kerf 51a. The fitting protrusion 61 is provided with a hole 64 for engagement. An elastic deformation-type fitting locking portion 62 is provided at a predetermined position on the lower surface of the bottom plate portion 5 corresponding to the fitting protrusion 61. FIG. 6B is a view showing only the fitting and locking portion 62 taken out, and is shown upside down with respect to FIG. The fitting locking portion 62 includes a recess 65 that allows the fitting protrusion 61 to enter, an operation portion 63b for fitting / removing at the tip, and an engagement projection 63a provided so as to face the recess 65 immediately inside. It is comprised with the elastic fitting body 63 which has. The engaging protrusion 63a has a one-side tapered tip, and acts so as to be able to advance and retract in the recess 65.
When the rear plate portion 7 and the bottom plate portion 5 are coupled, when the fitting protrusion 61 is inserted into the recess 65, the one-side tapered portion of the engaging protrusion 63 a is pushed by the fitting protrusion 61, and the engaging protrusion 63 a is moved from the recess 65. The engagement protrusion 63a is released from the engagement protrusion 63a at a position corresponding to the hole 64 of the engagement protrusion 61, and the engagement protrusion 63a returns to the recess 65 due to the repulsive force of the elastic fitting body 63. The mating protrusion 63 a is fitted into the hole 64 of the fitting protrusion 61. FIG. 6 (c) shows a state where the engagement protrusion 63a is fitted in the hole 64 of the fitting protrusion 61 and is shown in a sectional view. Thus, the back plate portion 7 and the bottom plate portion 5 are fixed. In the middle of fitting the projection 61 into the recess 65, the cut groove 51a is provided, so that the base 51b becomes elastic and the back plate 7 generates flexibility with respect to the bottom plate 5 so that smooth fitting is possible. I have to.
In the elastic fitting body 63, an operation portion 63b for fitting / removing is formed at a substantially right angle to the engaging protrusion 63a. When removing the back plate portion 7 and the bottom plate portion 5, the operating portion 63 b is pulled to retract the engaging projection 63 a from the recess 65, and the engaging projection 63 a is fitted into the hole 64 of the fitting projection 61. Unscrew and remove the fitting protrusion 61 from the recess 65.
When such two elastic deformation fitting means (the elastic fitting body 63 and the base 51b) are used, no screwing is required for the connection between the housing main body 2 and the rear housing 3, so that the housing main body 2 And disassembly and attachment work of the housing rear part 3 are facilitated.

Note that the slide fixing means is not limited to the above-described type, and any mechanism may be used as long as the casing rear section 3 is slid with respect to the casing main body 2 and then fixed. Further, in the present embodiment, the back surface of the roof plate portion 4 and the corresponding upper surfaces of the side plate portions 6a and 6b are engaged and slid in the front-rear direction. A configuration in which the back surface 75 of the back plate portion 7 and the rear surfaces of the side plate portions 6a and 6b are engaged and slid in the vertical direction may be employed.
Moreover, in the above-mentioned Example, although the backplate part 7 and the roof board part 4 which comprise the housing | casing rear part 3 were made | formed substantially at right angles, it is not restricted to this, For example, 60 degree | times, 120 degree | times,・ As long as they are joined at an appropriate angle.
When only the configuration in which the main circuit portion or the like is provided in the housing rear portion 3, the housing rear portion 3 and the housing main body portion 2 may be detachably attached by appropriate means instead of the above-described slide fixing means. Good.

  Finally, another embodiment of the slide fixing means for slidingly fixing the rear case 3 to the main body 2 will be described with reference to FIG. In this embodiment, slide portions 351a to 351d are provided on the bottom plate portion 5 of the housing body 2, and slide fixing projections 311a to 311d that are slidably engaged with the slide portions 351a to 351d are provided in the housing. It is provided at the lower edge of the left and right leg portions 41 a and 41 b extending downward from the roof plate portion 4 of the rear body portion 3. For example, as shown in FIG. 7A, the slide member 351 formed with two slide portions 351c and 351d is attached to one end of the bottom plate portion 5 (location near one side plate portion 6b) by screwing or the like. It is done. Similarly, another slide member in which two slide portions 351a and 351b are formed is attached to the other end of the bottom plate portion 5 (location near the other side plate portion 6a) by screwing or the like. In a), it cannot be seen because it is behind the side plate portion 6a, and only the numbers 351a and 351b are added for reference. Each of the slide portions 351a to 351d has a large hole portion (36a), a long hole portion (37a), a tapered surface (39a), etc., similar to the slide portion 35a shown in FIGS. 5 (a) and 5 (b). It is comprised including the element of. Therefore, detailed illustration and description of these elements shall be referred to FIG. 5 and the description thereof, and detailed illustration and description of these elements are omitted in FIG.

  The lower edges of the leg portions 41a and 41b extending downward on the lower surface of the roof plate portion 4 are bent inward at a substantially right angle to form an elongated horizontal portion. Slide fixing projections 311a to 311d are provided downward in the horizontal portion of the lower edge of the legs 41a and 41b. FIG. 7B shows an enlarged view of one slide fixing projection 311c provided on the leg portion 41b, which is similar to the slide fixing projection 31a shown in FIG. 5B. , Including a screw head 331c, a gap portion 321c, a flange portion 341c, and the like. The slide fixing projection 311c is screwed to the nut 312 and fixed to the horizontal portion of the lower edge of the leg 41b. Four slide fixing projections 311a to 311d are provided on the leg portions 41a and 41b of the roof plate portion 4 so as to correspond to the arrangement of the four slide portions 351a to 351d provided on the bottom plate portion 5, respectively. Other slide fixing projections 311a, 311b, 311d are shaded in FIG. 7A and are not clearly shown, but have the same configuration as the projection 311c.

  In the embodiment shown in FIG. 7, the slide fixing operation of the slide fixing projections 311a to 311d with respect to the slide portions 351a to 351d when the rear case 3 is attached to the main body 2 is the implementation shown in FIG. Since this is the same as the slide fixing operation of the slide fixing projections 31a to 31d in the example with respect to the slide portions 35a to 35d, the description thereof is omitted. That is, due to the presence of the tapered surface, the housing rear portion 3 is more strongly coupled in the direction of the arrow X as it is pushed into the housing body 2. The distance D1 from the upper surface of the slide portions 351a to 351d to the upper edges of the side plate portions 6a and 6b, and the distance D2 from the collar portion (341c) of the slide fixing projection portions 311a to 311d to the lower surface of the roof plate portion 4 As for the relationship, D1 is longer by an appropriate clearance C. That is, D1 = D2 + C. As a result, the roof plate portion 4 is pressed against the housing body portion 2 to obtain a hard connection.

  The arrangement (see FIG. 7) of the slide portions 351a to 351d having the hole and the tapered surface and the slide fixing projections 311a to 311d in the slide fixing means may be opposite to the above embodiment. That is, slide portions 351a to 351d (see FIG. 7) including elements (see FIG. 5) such as a large hole portion (36a), a long hole portion (37a), and a tapered surface (39a) are arranged on the roof plate portion 4 side. May be provided on the lower edge horizontal portion of the leg portions 41a and 41b, and provided on the slide member 351 on the bottom plate portion 5 side with the slide fixing projections 311a to 311d facing upward. Similarly, when the slide portions 35a to 35d are provided on the side plate portions 6a and 6b as in the example of FIG. 5, the slide portions 35a to 35d having holes and tapered surfaces in the slide fixing means and the slide fixing protrusions are provided. The arrangement of the portions 31a to 31d may be reversed from the above embodiment. That is, slide portions 35a to 35d including elements such as a large hole portion (36a), a long hole portion (37a), and a tapered surface (39a) are provided on the lower side of the roof plate portion 4 side, and a slide fixing protrusion The portions 31a to 31d may be provided on the upper surfaces of the side plate portions 6a and 6b with the portions 31a to 31d facing upward.

  As described above, according to the present invention, it is possible to provide an electronic keyboard instrument having a casing structure that can be easily and easily assembled and can be easily maintained and inspected for circuit boards inside the casing. Play.

(A) is a plan view showing an embodiment of an electronic keyboard instrument according to the present invention, (b) is a rear view of the electronic keyboard instrument according to the embodiment, and (c) is a bottom view of the electronic keyboard instrument according to the embodiment. Figure. The schematic perspective view which divided the housing | casing of the electronic keyboard musical instrument which concerns on the Example into the housing main body and the housing | casing rear part. It is a figure for demonstrating the housing | casing rear part of the electronic keyboard musical instrument which concerns on the same Example, (a) is an elevation view of a housing | casing rear part, (b) is a bottom view of a housing | casing rear part, (c) is a housing | casing. The side view of a body rear part. The top view of the housing body of the electronic keyboard musical instrument which concerns on the Example. It is a figure for demonstrating the slide adhering means of the housing | casing of the electronic keyboard instrument which concerns on the Example, Comprising: (a) is the top view which expanded the right side board part upper surface of the housing | casing main body shown in FIG. b) GG sectional view taken on the line of (a). It is a figure for demonstrating the other Example of the downward fixing means of a housing | casing rear part and a housing body, Comprising: (a) is a schematic perspective view which shows other Examples of a downward fixing means, (b) is (a) ) Is a schematic perspective view showing an example of a patch-on fitting locking portion, and FIG. 8C is a cross-sectional view showing an extracted state in which the engaging projection 63a is fitted in the hole 64 of the fitting projection 61. It is a figure for demonstrating another Example of the slide adhering means for carrying out the slide adhering of the housing | casing rear part to a housing | casing main-body part, Comprising: (a) is the outline schematically divided into a housing | casing main body and a housing | casing rear part. An exploded perspective view, (b) is a side view of a slide fixing protrusion provided at the rear of the housing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 2 Case main-body part (1st case part)
3 Rear of the housing (second housing part)
4 Roof plate portion 5 Bottom plate portion 6a, 6b Side plate portion 7 Back plate portion 8 Opening bar portion 9 Keyboard portions 21a, 21b, 21c Bonding holding plates 31a-31d, 311a-311d Slide fixing protrusions 35a-35d, 351a-351d Slide part

Claims (3)

In an electronic keyboard instrument comprising a keyboard part and a housing in which the keyboard part is arranged,
The housing includes a bottom plate portion, a side plate portion, a back plate portion, and a roof plate portion, the keyboard portion is placed on the bottom plate portion, and at least a first case portion including the bottom plate portion. The second casing part including at least the roof plate part and the back panel part is detachable so as to be completely separated, and the side plate part belongs to either the first casing part or the second casing part. And
Further, the circuit board of the panel portion and the main circuit board of the electronic keyboard instrument are disposed to belong to the second casing portion side, whereby the second casing portion is arranged on each circuit board. removably der to completely separate from the first housing portion with is,
Further, the second housing portion includes a coupling holding plate having a shape extending forward from the back plate portion, and the coupling holding plate has an upper side in contact with the roof plate portion and a lower side thereof. It consists of a structure in contact with the bottom plate part,
Said main circuit electronic keyboard instrument board is characterized Rukoto arranged on the side of the back plate portion is separated into two parts so as to be located to the right and left of the coupling holding plate. In an electronic keyboard instrument comprising a keyboard part and a housing in which the keyboard part is arranged,
The housing is
A bottom plate portion on which the keyboard portion is placed;
A mouth stick part rising from the bottom plate part in front of the keyboard part;
Side plate portions located on the left and right of the keyboard portion;
A roof plate part constituting the upper surface;
It is composed of a back plate portion provided at the rear portion of the roof plate portion,
The housing can be divided into a first housing portion including the bottom plate portion and the mouth bar portion, and a second housing portion including at least the back plate portion, and the first Detachable so as to completely separate the second casing part from the casing part, and the side plate part belongs to either the first or second casing part,
Further, the circuit board of the panel portion and the main circuit board of the electronic keyboard instrument are disposed to belong to the second casing portion side, whereby the second casing portion is arranged on each circuit board. removably der to completely separate from the first housing portion with is,
Further, the second casing portion includes a coupling holding plate having a shape extending forward from the back plate portion, and the coupling holding plate has an upper side in contact with the roof plate portion and a lower side thereof. It consists of a structure in contact with the bottom plate part,
Said main circuit electronic keyboard instrument board is characterized Rukoto arranged on the side of the back plate portion is separated into two parts so as to be located to the right and left of the coupling holding plate. The roof plate is included in the second housing portion, the circuit board of the panel portion, an electronic keyboard musical instrument according to claim 1 or 2 is arranged in the roof plate unit.

Images