JP5487767B2 - Keyboard support structure for keyboard instruments - Google Patents

Description

  The present invention relates to a keyboard support structure for supporting a unitized keyboard on a case in various keyboard instruments including an electronic keyboard instrument such as an electronic organ, an electronic piano, and a synthesizer.

  Various keyboard instruments including electronic keyboard instruments such as an electronic organ, an electronic piano, and a synthesizer are integrally connected to each other in a swingable state as shown in Patent Document 1, for example. Some have keyboard units. The keyboard unit includes a long bar-shaped mounting rail portion (key common base end portion) that extends in the key arrangement direction by connecting the rear ends of the keys via hinges. And this attachment rail part is attached in the state pinched | interposed between the upper case which covers the back upper part of a keyboard, and the lower case which covers the lower surface side of a keyboard.

  Conventionally, in order to assemble a keyboard instrument as described above, the mounting rail portion of the keyboard unit is fixed in advance with a screw or the like to either the upper case or the lower case, or a keyboard frame installed on the lower surface side of the keyboard. . In addition, a mounting rail portion is disposed between the upper case and the lower case, and screws (joint screws) for fixing the upper case and the lower case together are fastened. As a result, the keyboard frame is sandwiched between the upper case and the lower case and fixed together.

Japanese Examined Patent Publication No. 6-77195

  However, since the mounting rail portion of the keyboard unit is a long bar extending in the key arrangement direction, when the keyboard instrument is assembled by the above method, the mounting rail portion is fixed to the upper and lower cases or the keyboard frame. In addition, a large number of screws are required, and a screw for fixing the upper case and the lower case together is also required. For this reason, there has been a problem that the number of screws required for assembling the keyboard instrument is increased. This may hinder the efficiency of the keyboard instrument assembly process and the cost reduction and weight reduction of the keyboard instrument.

  In addition, in a structure in which multiple locations in the longitudinal direction of the mounting rail are fixed with screws, the fixed location in the mounting rail is determined by the load applied to the mounting rail from each key through the hinge when a key is pressed during performance. There is a risk of bending in the portion between. To give a specific example, the lower end of the protruding key stopper provided on the lower surface slightly behind the tip of the key is brought into contact with the case etc. The key drop is restricted. However, when a force that further pushes down the front end of the key is applied from there, a force in the direction of lifting the rear end side of the key with the key stopper as a fulcrum (upward) acts. As a result, a strong force acts to deflect the longitudinal direction of the mounting rail portion via the hinge portion. When such a force causes the mounting rail portion to bend, there is a problem that the key touch feeling deteriorates due to the rear end side of the key being lifted, or mechanical noise such as a squeak noise is generated.

  The present invention has been made in view of the above-mentioned points, and its purpose is to allow the keyboard unit to be securely fixed while reducing the cost and weight of the keyboard instrument with a simple structure with a reduced number of parts. It is to provide a keyboard support structure.

  In order to solve the above problems, the present invention provides a keyboard instrument for supporting a keyboard unit (10) formed by connecting a plurality of keys (11) in an array between an upper case (20) and a lower case (40). In the keyboard support structure, the keyboard unit (10) includes a plurality of keys (11) and a plurality of keys (11) extending in an arrangement direction so that each of the plurality of keys (11) is hinged (10a). ) And a long mounting rail portion (15) coupled so as to be able to swing, and the mounting rail portion (15) may be directly or other between the upper case (20) and the lower case (40). And is positioned and fixed only by a fixing tool (3) for fixing the upper case (20) and the lower case (40) together. Rail part (15) is upper case (20) or lower case (40) Is positioned only by a positioning tool (16, 17) for positioning with respect to the other member (50) and a fixing tool (3) for fixing the upper case (20) and the lower case (40) together. It is characterized by being positioned and fixed.

  In a keyboard instrument in which a keyboard unit formed by connecting a plurality of keys in an array state is supported between the upper case and the lower case, as in the present invention, it is directly between the upper case and the lower case, or other such as a keyboard frame. Positioning and fixing of the mounting rail part sandwiched through the members of the upper case and the lower case are performed only by a fixing tool for fixing the upper case and the lower case together, or the mounting rail part is used for the upper case, the lower case or other members. The number of fixtures such as screws necessary for assembling the keyboard instrument can be reduced by using only a positioning tool for positioning the upper case and the lower case together. It becomes possible to suppress less. As a result, the number of parts of the keyboard instrument can be reduced, the weight can be reduced, and the efficiency of the assembly process can be improved, and the cost of the keyboard instrument can be reduced.

  A keyboard unit in which a plurality of keys to which the keyboard support structure of the present invention is applied is connected in an array state may be adopted for a small keyboard instrument suitable for portability or a relatively inexpensive keyboard instrument. There are many. In such a keyboard instrument, if the number of fasteners such as screws for fixing the keyboard unit to the upper and lower cases can be reduced by one with the keyboard support structure of the present invention, the material efficiency and the assembly efficiency can be improved. As a result, the unit price of the product can be kept low, and a great effect can be obtained in reducing the manufacturing cost of the entire model. In addition, a small keyboard instrument can be expected to have a great effect on reducing the weight of the product.

  Here, the positioning by the positioning tool means that the mounting rail part is fixed to the upper and lower cases or other members before the upper and lower cases and the keyboard unit are permanently fixed so that the fixing position of the keyboard unit does not shift. This means that positioning is performed in advance. In addition, this positioning may be performed as temporary fixing with a screw or the like, but even in that case, the mounting rail portion is fixed to the upper and lower cases with a fixing tool. This means that the keyboard unit cannot be supported with the required strength.

  Further, in the above keyboard instrument, a protruding rib (25) extending along the longitudinal direction of the mounting rail portion (15) is formed on the surface of the upper case (20) facing the mounting rail portion (15). And it is good to clamp with the fixing tool (3) between the upper case (20) and the lower case (40) in the state which pressed down the attachment rail part (15) with the said rib (25).

  According to this configuration, since the mounting rail portion of the keyboard unit is pressed by the ribs extending in the key arrangement direction provided on the upper case, a plurality of screws or the like that are fixed along the longitudinal direction of the mounting rail portion. It becomes possible to reduce the number of fixtures. Further, since the longitudinal direction of the mounting rail portion is pressed by the rib, the rigidity of the mounting rail portion sandwiched between the upper and lower cases can be increased. Thereby, it can prevent that bending arises in the longitudinal direction of an attachment rail part. Therefore, it is possible to effectively suppress the feeling of touching the key due to the rear end of the key floating during performance or the occurrence of mechanical noise such as a squeak.

  In this case, a plurality of projecting boss portions (24) for fixing the fixture (3) are provided on the surface of the upper case (20) facing the mounting rail portion (15), and ribs are provided. (25) may be extended so as to connect the adjacent boss portions (24). According to this configuration, the mounting rail portion between the fixtures can be reliably pressed by the rib, so that it is possible to more effectively prevent the bending in the longitudinal direction of the mounting rail portion.

  Further, in this case, at least a part (26, 27) of the tip (25a) of the rib (25) may protrude from the tip (24a) of the boss part (24) toward the mounting rail part (15). . (See FIG. 6 in the embodiment described later.) In the keyboard support structure described above, the boss portion and the upper case in the vicinity thereof are firmly in contact with the mounting rail portion by the fixture, but are positioned between the adjacent boss portions. There is a possibility that the abutting force with respect to the mounting rail portion is weaker than the boss portion and the vicinity thereof. Therefore, if the tip of the rib is protruded to the mounting rail part side from the tip of the boss part as in the above configuration, the tip of the rib is in contact with the mounting rail part at a pressure equal to or higher than the tip of the boss part. Therefore, the mounting rail portion can be more reliably fixed by applying pressure with the rib between the adjacent boss portions.

  Further, in the keyboard instrument described above, the contact position of the rib (25) with respect to the mounting rail portion (15) is regulated at a position where the tip (25a) of the rib (25) in the mounting rail portion (15) contacts. For this purpose, a rib position restricting portion (30) is preferably provided. As a specific example of such a rib position restricting portion, a step or a ridge provided on the surface of the mounting rail portion on which the tip of the rib abuts can be cited.

  For various keyboard instruments, including electronic keyboard instruments such as electronic organs, electronic pianos, and synthesizers, the upper surface of the upper case installed on the rear side of the keyboard must be a panel operation surface that tilts toward the performer. There is. In this case, as the upper case is inclined, the ribs and bosses formed on the lower surface of the upper case may also be inclined with respect to the surface of the mounting rail portion. Then, when fixing fixtures, such as a screw, to a boss | hub part, the fixing position of the upper case with respect to an attachment rail part becomes easy to shift | deviate to the front-back direction of a keyboard instrument. In order to prevent this, if the rib position restricting portion is provided at a position where the rib in the mounting rail portion abuts as in the present invention, the fixing position of the upper case relative to the mounting rail portion in the front-rear direction can be prevented from shifting. It becomes like this.

In the above keyboard instrument, the cushioning material (28) may be interposed between the tip (25a) of the rib (25) and the mounting rail (15). When the upper case or the keyboard unit is a synthetic resin molded product, the contact surface between the rib of the upper case and the mounting rail portion may have slight unevenness. In that case, mechanical noise such as a squeak noise may occur from the contact surface between the upper case and the mounting rail portion. In order to prevent this, if a cushioning material is interposed between the rib and the mounting rail portion as in the present invention, noise such as fine vibrations and squeak noises of the rib and the mounting rail portion can be prevented. Further, the mounting rail portion can be more firmly fixed by the rib. Specific examples of such a buffer material include non-woven fabric, felt, sponge and the like.
In addition, the code | symbol in said parenthesis has shown the code | symbol of the corresponding component of embodiment mentioned later as an example of this invention.

  According to the keyboard support structure for a keyboard instrument according to the present invention, the keyboard unit can be securely fixed while reducing the cost and weight of the keyboard instrument with a simple structure with a reduced number of parts.

1 is a side sectional view schematically showing the configuration of a keyboard instrument according to a first embodiment of the present invention. (A) is the disassembled perspective view which shows a keyboard unit, (b) is the perspective view which looked at a part of upper case from the lower surface side. It is a sectional side view which shows roughly the structure of the keyboard musical instrument concerning 2nd Embodiment of this invention. It is a figure which shows schematically the structure of the keyboard musical instrument concerning 3rd Embodiment of this invention, (a) is a top view which shows the state which positioned the keyboard unit, (b) is a side view of (a). . It is a figure which shows the keyboard musical instrument concerning 4th Embodiment of this invention, (a) is a sectional side view which shows schematically the structure of a keyboard musical instrument, (b) saw a part of upper case from the lower surface side. A perspective view and (c) are partial sectional views showing a rib and its vicinity as seen from the front side of the upper case. It is a figure which shows the other structural example of the rib provided in the upper case. It is a sectional side view which shows roughly the structure of the keyboard musical instrument concerning 5th Embodiment of this invention. It is a sectional side view which shows roughly the structure of the keyboard musical instrument concerning 6th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[First Embodiment]
FIG. 1 is a side sectional view schematically showing a configuration of a keyboard instrument according to a first embodiment of the present invention. In the following description, the horizontal direction indicates the arrangement direction of keys 11 to be described later, and the front-rear direction indicates the longitudinal direction of each key 11. A keyboard instrument 1 shown in FIG. 1 includes a keyboard unit 10 in which a plurality of keys 11 (white keys 11a and black keys 11b) are connected in an array state, an upper case 20 and a lower case 40 that constitute the exterior of the keyboard instrument 1. And has a keyboard support structure in which the keyboard unit 10 is supported while being sandwiched between the upper case 20 and the lower case 40.

  The keyboard unit 10 includes a plurality of keys 11 and a long mounting rail portion (key common base end portion) in which rear ends of the plurality of keys 11 are connected via a hinge portion 10a and extend in the arrangement direction of the keys 11. 15). In the present embodiment, the mounting rail portion 15 is directly sandwiched between the upper case 20 and the lower case 40, and only the co-tightening screw 3 that is a fixing tool for fixing the upper case 20 and the lower case 40 together. The positioning and fixing are performed by. Although not shown, a key switch for detecting a key pressing operation on each key is provided on the lower surface side of the keyboard unit 10.

  FIG. 2A is an exploded perspective view showing the keyboard unit 10. The keyboard unit 10 includes a first white key linked body 10-1 in which every other four white keys 11a among seven white keys 11a for one octave are connected, and the remaining three white keys 11a. Are connected to each other, and a black key connector 10-3 in which black keys 11b for one octave are integrally connected. In FIG. 2A, only two white keys 11a of the first and second white key linked bodies 10-1 and 10-2 and two black keys 11b of the black key linked body 10-3 are shown. The others are not shown in the figure. Reference numeral 12 denotes a key stopper that protrudes on the lower surface side of the white key 11a and restricts the lowering of the white key 11a at a predetermined position.

  Each of the first and second white key linked bodies 10-1 and 10-2 and the black key linked body 10-3 is made of a synthetic resin molded product, and is a white key 11a or black key 11b arranged at a predetermined interval. The rear ends are connected to the common mounting pieces 15-1, 15-2, 15-3 via flexible thin plate hinges 10-1a, 10-2a, 10-3a. Each of the common attachment pieces 15-1, 15-2, and 15-3 is a thin plate-like piece whose longitudinal direction extends in the arrangement direction of the keys 11. Reference numerals 10-1b, 10-2b, and 10-3b are protrusions provided on the lower surface side of the hinge portions 10-1a, 10-2a, and 10-3a. These protrusions 10-1b, 10-2b, and 10-3b are formed when the intermediate portion in the longitudinal direction of the white key 11a or the black key 11b is pushed down with a very strong force while the key stopper 12 is acting. In this case, it comes into contact with a mounting portion 43 of the lower case 40 described later. The very strong force here refers to a force that is strong enough to cause bending in the longitudinal direction of the white key 11a or the black key 11b.

  The common attachment piece 15-2 of the first white key connector 10-1 and the common attachment piece 15-3 of the black key connector 10-3 are connected to the common attachment piece 15-2 of the second white key connector 10-2. Are combined to form a keyboard unit 10 for one octave in which seven white keys 11a and five black keys 11b are arranged. At this time, the common attachment pieces 15-1 to 15-3 are overlapped to form an integral attachment rail portion 15. Although detailed description is omitted, positioning protrusions and grooves are formed on the upper and lower surfaces of the common mounting pieces 15-1 to 15-3, and the positions do not shift when they are overlapped with each other. It is like that.

  In the keyboard instrument 1, a plurality of keyboard units 10 having the above configuration are arranged in parallel along the arrangement direction of the keys 11. At this time, the end portions of the attachment rail portions 15 of the adjacent keyboard units 10 may be connected (fixed) as necessary. In that case, the attached mounting rail part 15 becomes a long bar shape extended | stretched in a straight line along the arrangement | sequence of the key 11 for several octaves.

  On the other hand, each of the upper case 20 and the lower case 40 is a component that forms an exterior on the upper surface side and the lower surface side of the keyboard instrument 1. The upper case 20 and the lower case 40 may be molded articles made of synthetic resin, for example. The lower case 40 is formed in a substantially saucer shape that covers the lower surface side of the keyboard unit 10, and the lower wall 41 at a position corresponding to the vicinity of the rear end from the front end of the key 11 is a position spaced below the key 11. A step 42 that is one step higher than the lower wall 41 is formed on the rear side of the lower wall 41. The upper surface of the stepped portion 42 is a planar mounting portion (key support portion) 43 for mounting and fixing the mounting rail portion 15 of the keyboard unit 10. The mounting portion 43 extends along the arrangement direction (lateral direction) of the keys 11.

  FIG. 2B is a perspective view of a part of the upper case 20 as viewed from the lower surface side. The upper case 20 is a member that is placed over the rear side of the visible hanging part that is a part of a predetermined length from the front end of the key 11, and a panel surface such as a control panel is provided on the upper surface side. There is also. The upper case 20 includes a front wall 21 erected facing the rear end surface of the black key 11b, and a flat plate-like upper wall 22 extending in a substantially horizontal direction from the upper end of the front wall 21 toward the rear side. I have. On the lower surface side (rear surface side) 22 a of the upper wall 22, a boss 24 made of a substantially cylindrical small protrusion is formed to protrude. A plurality of bosses 24 are arranged at predetermined intervals along the longitudinal direction of the mounting rail portion 15. A screw hole 24 b is formed at the center of the lower end surface 24 a of each boss 24. The screw hole 24b is used to fasten the co-tightening screw 3 (see FIG. 1) that is a fixing tool for fixing the upper case 20 and the lower case 40 together. Further, an insertion hole 15 a and an insertion hole 43 a for inserting the co-fastening screw 3 are formed at positions facing the bosses 24 in the mounting rail portion 15 and the mounting portion 43 of the lower case 40, respectively.

  In order to assemble the keyboard instrument 1 having the above configuration, the keyboard unit 10 is assembled in advance by integrating the first and second white key linked bodies 10-1 and 10-2 and the black key linked body 10-3. Then, the mounting rail portion 15 of the keyboard unit 10 is placed on the placement portion 43 of the lower case 40, and the upper case 20 is placed on the upper surface side of the lower case 40 and attached. Thereby, the mounting rail portion 15 is sandwiched between the boss 24 of the upper case 20 and the placement portion 43 of the lower case 40. In this state, the co-tightening screw 3 is inserted into the insertion hole 43 a of the mounting portion 43 and the insertion hole 15 a of the mounting rail portion 15 from the lower surface side of the lower case 40, and is fastened and fixed to the screw hole 24 b of the boss 24. Thereby, the upper and lower cases 20 and 40 and the mounting rail portion 15 sandwiched therebetween are integrally fixed.

  As described above, the mounting rail portion 15 of the keyboard unit 10 is fixed between the upper and lower cases 20 and 40, and the keys 11 of the keyboard unit 10 are arranged in a substantially horizontal plane on the front side of the mounting rail portion 15. And since each key 11 is connected via the hinge part 10a which has flexibility with respect to the attachment rail part 15, each key 11 is because the hinge part 10a bends according to key pressing operation. The front end side swings up and down. Note that the key 11 (white key 11a) to be pressed is restricted at a position where the lower end of the key stopper 12 contacts the lower wall 41, and further lowering is restricted.

  In the keyboard mounting structure of the present embodiment, the mounting rail portion 15 of the keyboard unit 10 is fixed only by the co-tightening screws 3 for fixing the upper case 20 and the lower case 40 together. Therefore, as compared with the conventional case where both a screw for fixing the mounting rail portion to another member in advance and a screw for fastening the upper and lower cases together are used, it is necessary for the assembly of the keyboard instrument 1. It is possible to reduce the number of screws. As a result, the number of parts of the keyboard instrument can be reduced, the weight can be reduced, and the efficiency of the assembly process can be improved, and the cost of the keyboard instrument can be reduced.

  The co-tightening screws 3 for fixing the upper and lower cases 20, 40 and the keyboard unit 10 are desirably installed corresponding to at least both ends of the mounting rail portion 15, but the specific number of installation is not limited. In the above description, the keyboard unit 10 includes the keys 11 for one octave. However, the keyboard unit of the present invention may have a configuration in which more keys than one octave are integrally connected. Good. Furthermore, in the case of a small keyboard instrument, all keys provided for the keyboard instrument may be integrally connected. In such a case, since the length of the mounting rail portion 15 becomes longer, the co-tightening screw 3 is fixed not only at both ends of the mounting rail portion 15 but also at one or more appropriate positions in the middle. You can do it.

  Note that a keyboard unit 10 formed by connecting a plurality of keys 11 in an array is often used for a small keyboard instrument suitable for carrying or a relatively inexpensive keyboard instrument. In such a keyboard instrument, if the number of fixtures such as screws for fixing the keyboard unit 10 to the upper and lower cases 20 and 40 can be reduced by one by applying the keyboard support structure of the present embodiment, that amount can be reduced accordingly. By keeping the unit price of the product low, a significant effect can be obtained in reducing the manufacturing cost of the entire model. In addition, a small keyboard instrument can be expected to have a great effect on reducing the weight of the product.

[Second Embodiment]
Next, a keyboard instrument according to a second embodiment of the present invention will be described. In the description of the second embodiment and the corresponding drawings, the same or corresponding components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted below. Further, matters other than those described below and matters other than those illustrated are the same as those in the first embodiment.

  FIG. 3 is a side sectional view schematically showing the configuration of the keyboard instrument 1-2 of the second embodiment. The keyboard instrument 1-2 shown in the figure includes a keyboard frame 50 for supporting the keyboard unit 10 in addition to the configuration of the keyboard instrument 1 of the first embodiment. The keyboard frame 50 is a substantially plate-like member installed between the keyboard unit 10 and the lower case 40, and the surface thereof is the front-rear direction and the arrangement direction of the keys 11 along the lower surface of the keyboard unit 10 (the lower surface of the key 11). A rear end side 50b that is one step higher than the intermediate portion in the front-rear direction and a front end side 50c that is one step lower than the intermediate portion, and the rear end side 50b is a keyboard unit. 10 mounting rails 15 and the mounting portion 43 of the lower case 40. That is, in the keyboard instrument 1-2 of the present embodiment, the mounting rail portion 15 of the keyboard unit 10 is sandwiched between the boss 24 of the upper case 20 and the mounting portion 43 of the lower case 40 together with the keyboard frame 50. . The front end side 50c of the keyboard frame 50 is a portion for restricting further lowering of the key 11 by bringing the lower end of the key stopper 12 into contact when the key 11 is pushed down to the full.

  The keyboard instrument 1-2 according to the present embodiment has the same configuration as the keyboard instrument 1 according to the first embodiment except that a keyboard frame 50 is interposed between the upper and lower cases 20 and 40. Accordingly, also in this case, the mounting rail portion 15 of the keyboard unit 10 is fixed only by the co-tightening screw 3 for fixing the upper case 20 and the lower case 40 together. Therefore, the number of fixing tools such as screws necessary for assembling the keyboard instrument 1-2 can be reduced as compared with the conventional case.

[Third Embodiment]
4A and 4B are diagrams showing a keyboard instrument 1-3 according to the third embodiment of the present invention. FIG. 4A is a plan view showing a state in which the keyboard unit 10 is positioned on the keyboard frame 50, and FIG. It is a schematic sectional side view of (a). The keyboard instrument 1-3 of the present embodiment is further provided with a positioning mechanism 18 shown in FIG. 4 in the keyboard instrument 1-2 of the second embodiment shown in FIG. The positioning mechanism 18 is a mechanism for positioning the mounting rail portion 15 of the keyboard unit 10 with respect to the keyboard frame 50 before being fixed to the upper and lower cases 20, 40. A positioning hook 17 formed integrally with the rail portion 15 is provided. Note that the keyboard unit 10 included in the keyboard instrument 1-3 of the present embodiment is one in which keys 11 for one octave are connected, as in the first and second embodiments.

  The positioning screw 16 passes through the vicinity of the one end 15c of the mounting rail portion 15 from the upper surface side and is fastened to the keyboard frame 50 on the lower surface side. In the state where the positioning screw 16 is attached, the mounting rail portion 15 is configured such that the other end 15d can be rotated back and forth within the horizontal plane with the positioning screw 16 as a fulcrum. On the other hand, the positioning hook 17 is formed of a strip having a substantially U-shaped cross section that is formed to protrude from the rear side surface of the other end 15d of the mounting rail portion 15. When the mounting rail portion 15 is in a normal position, the keyboard frame 50 Is engaged with the rear end side 50b. The other end 15d of the mounting rail portion 15 rotatably supported by the positioning screw 16 is engaged with the rear end side 50b of the keyboard frame 50, so that the mounting rail portion 15 is accurately positioned with respect to the keyboard frame 50. It has become so.

  In assembling the keyboard instrument 1-3 of the present embodiment, the mounting rail portion 15 of the keyboard unit 10 is positioned (temporarily fixed) with respect to the keyboard frame 50 in advance as shown in FIG. In this state, the mounting rail portion 15 and the keyboard frame 50 are sandwiched between the upper case 20 and the lower case 40, and these are integrally fixed with the co-tightening screws 3. Thereby, the keyboard unit 10 can be fixed in a state where it is accurately positioned with respect to the upper case 20 and the lower case 40.

  That is, if there is no means for positioning the mounting rail portion 15, the mounting rail portion 15 is dropped from between the upper and lower cases 20, 40 when the mounting rail portion 15 is sandwiched between the upper and lower cases 20, 40 and fixed integrally. There is a risk that a malfunction such as a deviation from a regular position may occur. On the other hand, in the keyboard instrument 1-3 of the present embodiment, since the positioning mechanism 18 is provided, the keyboard unit 10 can be permanently fixed to the upper and lower cases 20 and 40 with the mounting rail portion 15 positioned. Can be prevented from falling off or being displaced.

  As the positioning mechanism according to the present invention, in addition to the configuration including the positioning screw 16 and the positioning hook 17 as described above, although not shown, the mounting rail portion 15 is attached to the keyboard frame 50 using an appropriate jig. The structure temporarily fixed to may be sufficient. Further, the counterpart member for positioning the mounting rail portion 15 may be the upper case 20 or the lower case 40 as well as the keyboard frame 50, or may be another member. For example, when a hard circuit board is installed on the lower surface side of the keyboard unit 10, the mounting rail portion 15 can be positioned with respect to the circuit board.

  In the keyboard instrument 1-3 of the present embodiment, the mounting rail portion 15 of the keyboard unit 10 is positioned and fixed only by the positioning mechanism 18 including the positioning screw 16 and the positioning hook 17 and the co-tightening screw 3. Therefore, similarly to the keyboard instruments 1 and 1-2 of the first and second embodiments, the number of fasteners such as screws necessary for assembling the keyboard instrument 1-3 can be reduced as compared with the conventional ones.

[Fourth Embodiment]
FIG. 5: is a figure which shows the keyboard instrument 1-4 concerning 4th Embodiment of this invention, (a) is a sectional side view which shows the structure of the keyboard instrument 1-4 schematically, (b) is The perspective view which looked at the upper case 20 from the lower surface side, (c) is a partial sectional side view showing a part of the upper case 20. In addition to the configuration of the keyboard instrument 1-2 of the second embodiment, the keyboard instrument 1-4 of the present embodiment has a protruding rib formed on the lower surface side (mounting rail portion 15 side) 22a of the upper case 20. 25. The rib 25 has a thin plate shape that protrudes along the mounting rail portion 15, and extends so as to connect the bosses 24 provided on the lower surface side 22 a of the upper case 20. 5A and 5C, the mounting rail portion 15 of the keyboard unit 10 sandwiched between the upper and lower cases 20 and 40 and the keyboard frame 50 has an upper surface 15b whose lower end side is the rib 25. It is fixed in a state of being pressed by 25a.

  In the keyboard instrument 1-4 according to the present embodiment, ribs 25 extending in the arrangement direction of the keys 11 are provided on the upper case 20, and the mounting rail portion 15 of the keyboard unit 10 is pressed and fixed by the ribs 25. . Thereby, the number of the co-tightening screws 3 which are fixing tools can be reduced, enabling the attachment rail part 15 to be fixed reliably. In addition, since the mounting rail portion 15 fixed between the upper and lower cases 20 and 40 is pressed by the rib 25 extending along the longitudinal direction, the rigidity of the mounting rail portion 15 can be increased. 15 can be prevented from bending in the longitudinal direction.

  That is, when the front end side of the key 11 (white key 11a) is depressed by a key depression operation, the lower end of the key stopper 12 comes into contact with the keyboard frame 50, and the lowering of the key is restricted at that position. However, when a force that further pushes down the front end side of the key 11 is applied from there, as a reaction, a force in the direction in which the rear end side of the key 11 is lifted up with the key stopper 12 as a fulcrum acts. Thereby, a strong upward force is applied to the mounting rail portion 15 via the hinge portion 10a. This force acts as a force for bending the longitudinal direction of the mounting rail portion 15. However, in the keyboard instrument 1-4 of the present embodiment, the mounting rail portion 15 is pressed by the ribs 25 along the longitudinal direction thereof, so that the mounting rail portion 15 can be prevented from being bent.

  Further, in the keyboard instrument 1-4 of the present embodiment, the key stopper 11 is prevented from being lowered by the key stopper 12, and further the intermediate portion in the longitudinal direction of the key 11 (the portion between the key stopper 12 and the hinge portion 10a). Is pushed down with a very strong force, the portion between the key stopper 12 and the mounting rail portion 15 may be bent so as to protrude downward along its longitudinal direction. Then, the protrusion 10b provided on the lower surface side of the hinge 10a comes into contact with the key frame 50 installed on the lower side of the keyboard 10. At this time, the key 11 at the front side of the protruding portion 10b is bent so as to protrude downward, so that the protruding portion 10b is provided on the hinge portion 10a and the mounting rail portion 15 at the rear side of the protruding portion 10b. An upward force acting on the fulcrum acts. Also by this, the force which tries to bend the longitudinal direction of the attachment rail part 15 is applied. However, also in this case, since the mounting rail portion 15 is pressed by the rib 25, it is possible to prevent the mounting rail portion 15 from being bent in the longitudinal direction. As described above, since the mounting rail portion 15 can be prevented from being bent, the rear end side of the key 11 is lifted during performance, and the key touch feeling is deteriorated, or a squeak noise is generated from the fixing portion of the mounting rail portion 15. Mechanical noise can be prevented from being generated.

  FIG. 6 is a diagram illustrating another configuration example of the rib 25 provided in the upper case 20. In FIG. 5, the lower end side 25 a of the rib 25 provided on the lower surface side 22 a of the upper case 20 is formed in a straight line that is continuous with the lower end surfaces 24 a of the bosses 24 on both sides. ), A protruding portion 26 protruding in a curved surface shape with respect to the lower end surfaces 24a of the bosses 24 on both sides may be formed on a part of the lower end side 25a of the rib 25. Further, as shown in FIG. 6B, a protruding portion 27 protruding in a rectangular step shape may be formed on a part of the lower end side 25 a of the rib 25.

  As shown in FIGS. 6A and 6B, at least part of the lower end side 25a of the rib 25 is slightly protruded downward (on the mounting rail portion 15 side) with respect to the lower end surface 24a of the bosses 24 on both sides. The lower end side 25a of the rib 25 comes into contact with the mounting rail portion 15 with a pressure equal to or higher than the lower end surface 24a of the boss 24 and the vicinity thereof. Thereby, the attachment rail part 15 comes to be fixed more reliably by the rib 25 between the adjacent bosses 24.

[Fifth Embodiment]
FIG. 7 is a side sectional view schematically showing a configuration of a keyboard instrument 1-5 according to the fifth embodiment of the present invention. In the keyboard instrument 1-5 of the present embodiment, the rib position restricting portion 30 for restricting the front and rear positions of the rib 25 with respect to the mounting rail portion 15 is provided at a position where the lower end side 25a of the rib 25 in the mounting rail portion 15 contacts. ing.

  In various keyboard instruments such as an electronic organ, an electronic piano, and a synthesizer to which the keyboard support structure of this embodiment is applied, the upper wall 22 of the upper case 20 installed on the rear side of the keyboard unit 10 faces the player side. The panel operation surface may be inclined. That is, although detailed illustration is omitted, the upper wall (panel portion) 22 covering the upper part behind the visible hanging portion of the key 11 is a key pressing instruction LED on the side close to the visible hanging portion of the key 11. May be built in, or a key split switch may be provided. Further, a timbre selection switch, a mode change switch, and the like are provided at a position away from the visible hanging portion of the key 11.

  In this case, the upper wall 22 is inclined so as to gradually rise obliquely rearward from the position of the rear end of the key 11, so that the boss 24 and the rib 25 provided on the upper case 20 are formed on the upper surface 15 b of the mounting rail portion 15. It may be inclined with respect to it. If it does so, when fixing the co-fastening screw 3 to the boss | hub 24, the fixing position of the upper case 20 with respect to the attachment rail part 15 will shift | deviate easily back and forth. In order to prevent this, in the keyboard instrument 1-5 of the present embodiment, the rib position restricting portion 30 is provided at a location where the rib 25 in the mounting rail portion 15 contacts.

  Specific examples of the configuration of the rib position restricting unit 30 include those shown in FIGS. In the keyboard instrument 1-5 shown in FIG. 7A, a step 31 is provided at a position where the lower end side 25a of the rib 25 on the upper surface 15b of the mounting rail portion 15 abuts. The step 31 is formed in a straight line along the longitudinal direction of the rib 25, and is a step such that the rear side is slightly higher than the front side of the rib 25. Since the step 31 restricts the rearward movement of the lower end side 25a of the rib 25, the upper case 20 can be prevented from shifting to the rear side. In the fifth embodiment, in order to prevent a slight backward movement of the keyboard unit 10 due to the fastening of the co-tightening screw 3, a protrusion 50d extending in the arrangement direction of the keys 11 at the upper rear end of the keyboard frame 50 is provided. It has been.

  Further, in the keyboard instrument 1-5 shown in FIG. 7B, a protrusion 32 for restricting the back and forth movement of the rib 25 is provided on the upper surface 15b of the mounting rail portion 15. The protrusions 32 are formed in a straight line along the longitudinal direction of the rib 25, and one line is formed at each of the positions facing the front side and the rear side of the lower end side 25 a of the rib 25. Since the protrusions 32 restrict the longitudinal movement of the ribs 25 provided on the upper case 20, it is possible to prevent the upper case 20 from shifting to the front side or the rear side with respect to the regular fixed position. In addition, when it is only necessary to restrict the upper case 20 from shifting to the rear side, the protrusion may be only one rear line.

[Sixth Embodiment]
FIG. 8 shows a keyboard instrument 1-6 according to the sixth embodiment of the present invention. The keyboard instrument 1-6 of the present embodiment includes a cushioning material 28 interposed between the lower end side 25a of the rib 25 of the upper case 20 and the upper surface 15b of the mounting rail portion 15.

  In the keyboard musical instruments 1-3 to 1-5 of the third to fifth embodiments, the lower end side 25 a of the rib 25 is fixed in a state of being in contact with the upper surface 15 b of the mounting rail portion 15. In this case, if the upper case 20 or the keyboard unit 10 is a synthetic resin molded product, there are many cases where the upper case 20 and the keyboard unit 10 are slightly uneven. If it does so, there exists a possibility that mechanical noises, such as a squeak noise, may generate | occur | produce from the contact location of the rib 25 and the attachment rail part 15. FIG. In order to prevent this, in the keyboard instrument 1-6 of the present embodiment, the cushioning material 28 is interposed between the lower end side 25a of the rib 25 and the upper surface 15b of the mounting rail portion 15. Thereby, noises, such as the slight vibration of the rib 25 and the attachment rail part 15, and a squeak noise, can be prevented. Further, the fixing of the mounting rail portion 15 by the rib 25 can be made stronger. As a specific example of the buffer material 28 here, a soft member that easily deforms when compressed is desirable, and examples thereof include nonwoven fabric, felt, and sponge.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. It should be noted that any shape, structure, and material not directly described in the specification and drawings are within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited.

  For example, the specific shape, arrangement, number of installations, and the like of the ribs 25 and the bosses 24 provided on the upper case 20 shown in the above embodiments are examples. Therefore, the rib provided on the upper case in the keyboard mounting structure of the present invention is not limited to a straight line along the mounting rail portion 15 as shown in the above embodiment, but may have other shapes such as a curved line or a bent line. You can also. The number of ribs is not limited to one, and two or more ribs may be provided.

  In the above-described embodiment, the case where the fixing tool for fixing the upper and lower cases 20 and 40 integrally is the screw (co-tightening screw) 3 is described. However, the fixing tool for the keyboard mounting structure according to the present invention is a fixing tool other than the screw. It may be a tool. For example, a fixing tool that is fixed by caulking the mating portion of the upper case and the lower case or a fixing tool that is fixed by pinching may be used. When the upper and lower cases are molded products of synthetic resin, a protruding engagement claw is provided on one of the upper and lower cases, and the engagement claw is snap-in engaged with either one of the upper and lower cases. For example, a structure for fixing both together may be used.

1-1-6 Keyboard instrument 3 Tightening screw (fixture)
10 Keyboard unit 10a Hinge part 11 Key 15 Mounting rail part (key common base end part)
15b upper surface 16 positioning screw 17 positioning hook 18 positioning mechanism 20 upper case 21 front wall 22 upper wall 22a lower surface side 24 boss 24a lower end surface 25 rib 25a lower end side 28 cushioning material 30 rib position regulating portion 40 lower case 41 lower wall 42 step portion 43 Placement part 50 Keyboard frame (other members)

Claims (5)

A keyboard support structure for a keyboard instrument that supports a keyboard unit in which a plurality of keys are assembled between an upper case and a lower case,
The keyboard unit includes the plurality of keys and a long mounting rail portion that extends in the arrangement direction of the plurality of keys and that each of the plurality of keys is connected to be swingable via a hinge portion. Prepared,
On the surface facing the mounting rail portion in the upper case, a protruding rib extending along the longitudinal direction of the mounting rail portion is formed,
A rib position restricting portion for restricting a contact position of the rib with respect to the mounting rail portion is provided at a position where the tip of the rib contacts the mounting rail portion.
The mounting rail portion is sandwiched between the upper case and the lower case directly or via another member while being pressed by the ribs, so as to fix the upper case and the lower case together. A keyboard support structure for a keyboard instrument, characterized in that the positioning and fixing are performed only by the fixing tool. A keyboard support structure for a keyboard instrument that supports a keyboard unit in which a plurality of keys are assembled between an upper case and a lower case,
The keyboard unit includes the plurality of keys and a long mounting rail portion that extends in the arrangement direction of the plurality of keys and that each of the plurality of keys is connected to be swingable via a hinge portion. Prepared,
On the surface facing the mounting rail portion in the upper case, a protruding rib extending along the longitudinal direction of the mounting rail portion is formed,
A rib position restricting portion for restricting a contact position of the rib with respect to the mounting rail portion is provided at a position where the tip of the rib contacts the mounting rail portion.
The mounting rail portion is sandwiched between the upper case and the lower case while being pressed by the rib, directly or via another member, and the mounting rail portion is connected to the upper case or the lower case, A keyboard instrument characterized by being positioned and fixed only by a positioning tool for positioning with respect to the other member and a fixing tool for fixing the upper case and the lower case together. Keyboard support structure. A plurality of projecting boss portions for fixing the fixing tool are provided on the surface of the upper case facing the mounting rail portion,
The ribs, keyboard support structure of a keyboard instrument according to claim 1 or 2, characterized in that it is stretched so as to connect between the boss portion adjacent. 4. The keyboard support structure for a keyboard instrument according to claim 3 , wherein at least a part of the tip of the rib protrudes toward the mounting rail part from the tip of the boss part. The keyboard support structure for a keyboard instrument according to any one of claims 1 to 4 , wherein a cushioning material is interposed between a tip of the rib and the mounting rail portion.

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