JP5829874B2 - Electronic keyboard instrument control panel support structure - Google Patents

Description

  The present invention is applied to an electronic keyboard instrument such as an electronic piano, and relates to a control panel support structure for an electronic keyboard instrument that supports a control panel.

  In general, the control panel of an electronic piano is provided with a large number of operation units for setting a timbre, a sound source, and the like, and is formed in a horizontally long plate shape extending in the left-right direction as a whole. It is arranged above the rear part of the keyboard device having a plurality of (for example, 88) keys. Conventionally, for example, a structure disclosed in Patent Document 1 is known as a support structure of such a control panel. In this support structure, the left and right ends of the control panel are supported by the left and right arms of the electronic piano via hooks and metal fittings.

JP 2003-15650 A

  In the above support structure, since the control panel is supported only at the left and right ends, for example, when an external force is applied to the center of the control panel by mistake, the center of the control panel is recessed. There is a fear. Of course, it is possible to prevent the above-described problems by standing a support member below the control panel and supporting the control panel from below with the support member. However, depending on the structure of the keyboard device, the support member itself may not be stably held. For example, in a keyboard device having a keyboard rail made of a metal plate that extends in the left-right direction and supports the keyboard, it is conceivable that a support member is erected on the keyboard rail. Such a keyboard rail generally employs a metal plate having a relatively small thickness from the viewpoint of reducing the weight of the entire keyboard device. For this reason, as described above, when an external force is accidentally applied to the control panel, the keyboard rail is recessed through the support member, and the keyboard device may be damaged.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a control panel support structure for an electronic keyboard instrument that can support the control panel firmly and stably. .

In order to achieve the above object, the invention according to claim 1 is a front rail that extends in the left-right direction and is spaced from each other in the front-rear direction, and supports a plurality of keys arranged in parallel in the left-right direction from below. A control panel support structure for an electronic keyboard instrument that supports a control panel that extends in the left-right direction and is disposed above a plurality of keys, and that extends in the front-rear direction and has a front rail. And a rail connecting member that connects the rear rail, and a panel support member that extends upward to the rail connecting member and supports the control panel from below , including a front rail, a rear rail, and a rail connecting member Is composed of a metal plate, and the rail connecting member is composed of a metal plate thicker than the thickness of the front rail and the rear rail. And said that you are.

  According to this configuration, the front rail and the rear rail that both extend in the left-right direction and support a plurality of keys from below are connected by the rail connecting member that extends in the front-rear direction. The control panel is supported from below by a panel support member provided so as to extend. The rail connecting member is significantly shorter than the front and rear rails, which are relatively long in the left-right direction, so that the weight of the entire keyboard device does not increase significantly even if it is made of a relatively strong material. . Therefore, the rail connection member is made of a strong material, and the panel support member is erected on the rail connection member, thereby supporting the control panel firmly and stably without increasing the overall weight of the keyboard device. can do

Moreover, according to said structure, since the plate | board thickness of the rail connection member comprised with the metal plate is thicker than the plate | board thickness of the front side rail and back rail comprised with the metal plate, a rail connection member is used as a front rail. It can be constructed more firmly than the rear rail. Therefore, according to the above configuration, the operation and effect of the pre-mentioned, can be easily realized.

According to a second aspect of the present invention, in the control panel support structure for an electronic keyboard instrument according to the first aspect , the panel support member is formed integrally with a rail connecting member.

  According to this configuration, since the panel support member is integrated with the rail connection member, it is not necessary to attach the panel support member to the rail connection member, unlike the case where the two are configured separately, and it is not necessary to assemble the electronic keyboard instrument. Can be reduced.

According to a third aspect of the present invention, in the control panel support structure for an electronic keyboard instrument according to the first or second aspect, the rail coupling member is composed of a plurality of rail coupling members that are spaced apart from each other in the left-right direction. Each of the plurality of rail connecting members is configured such that a panel support member can be arbitrarily attached thereto.

  According to this configuration, each of the plurality of rail connecting members arranged at intervals in the left-right direction can arbitrarily attach the panel supporting member, so that the panel supporting member can be attached to all the rail connecting members. Of course, if necessary, the panel support member can be attached to any rail connecting member. Thereby, the freedom degree of installation of a panel support member can be raised.

It is a side view which shows the keyboard apparatus of the electronic piano to which the control panel support structure by one Embodiment of this invention is applied, in the state which partly notched. (A) is a top view which shows the keyboard chassis in the state which notched, and (b) is a figure which expands and shows the inside of the dashed-dotted line frame C of (a). (A) is a perspective view which shows a rib and a panel support metal fitting, (b) is a side view of the keyboard apparatus which shows the state which supported the control panel with the panel support metal fitting.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a keyboard device of an electronic piano to which a control panel support structure according to an embodiment of the present invention is applied in a key release state.

  As shown in the figure, the keyboard device 1 includes a large number of keys 2 (only one white key 2a and one black key 2b are shown) arranged in the left-right direction (front and back direction in FIG. 1) of the electronic piano, A keyboard chassis 3 that supports the key 2, a hammer support 4 connected to the rear end (right end in FIG. 1) of the keyboard chassis 3, and provided for each key 2. A number of hammers 5 (only one shown), a number of let-off parts 6 (only one shown) provided for each hammer 5 to give a let-off feeling when the key 2 is depressed, and a key The key switch 7 is used to detect the key depression information 2.

  The keyboard chassis 3 includes three support rails 9 including a front rail 9a (front rail), a middle rail 9b (rear rail), and a rear rail 9c extending in the left-right direction, and five reinforcing ribs extending in the front-rear direction. 10 (rail connecting member) is assembled in a cross-beam shape, and is fixed on a shelf board (not shown). Each of these support rails 9 and ribs 10 is composed of an iron plate formed into a predetermined shape by stamping and bending with a press. The plate thickness of the support rail 9 is set to be thinner (for example, 1.0 mm) for weight reduction, and the plate thickness of the rib 10 is set to be thicker (for example, 1.6 mm) for reinforcement.

  A saddle front 11 and a saddle center 12 are fixed to the lower surface of the front rail 9a and the upper surface of the middle rail 9b, respectively. The saddle front 11 and the saddle center 12 are thick plate-shaped members made of synthetic resin, and extend in the left-right direction over the entire front rail 9a and middle rail 9b. A large number of balance pins 13 are erected in a state where the balance 12 is arranged in the left-right direction at the front and rear positions corresponding to the white key 2a and the black key 2b. A large number of front pins 14 are erected on the front 11 in front and rear positions corresponding to the white key 2a and the black key 2b in a state where the front pins 14 are arranged in the left-right direction.

  The key 2 includes a wooden key body 15 extending in the front-rear direction and having a rectangular cross section, and a key cover 16 made of synthetic resin bonded to the upper surface and the front surface of the front portion. A balance pin hole 17 is formed behind the center of the key body 15, and the key 2 is swingably supported by the balance pin 13 through the balance pin hole 17. Further, a front pin hole 18 is formed at the front end portion of the key body 15, and the front pin hole 18 engages with the front pin 14, thereby causing a lateral shake when the key 2 rotates. Is prevented.

  The hammer support 4 is made of a synthetic resin, and is formed by connecting a plurality of molded products for one octave, for example, and extends in the left-right direction so as to cover all the hammers 5, and is attached to the rear rail 9 c of the keyboard chassis 3. It is screwed. The hammer support 4 is composed of a hammer support portion 19 standing upright from the vicinity of the rail 9c and a switch mounting portion 20 extending obliquely upward from the upper end portion. A horizontal pin-shaped fulcrum shaft portion 21 for supporting each hammer 5 is formed at the upper end portion of the hammer support portion 19.

  The hammer 5 has an arm-shaped hammer body 22 extending in the front-rear direction and a weight plate 23 (only one is shown) attached to the front end portions of the left and right side surfaces thereof. The hammer body 22 is made of a synthetic resin, and the weight plate 23 is made of a metal material such as iron having a relatively large specific gravity. An arc-shaped shaft hole 24 is formed at the rear end portion of the hammer body 22, and the hammer 5 is rotatable to the hammer support 4 by engaging the shaft hole 24 with the fulcrum shaft portion 21. It is supported.

  A capstan screw 25 is screwed into the lower surface of the hammer body 22 at a position immediately in front of the shaft hole 24 so as to be able to advance and retract. The hammer 5 is placed on the rear end portion of the key 2 via the capstan screw 25. Further, a portion between the shaft hole 24 and the capstan screw 25 on the upper surface of the hammer body 22 is an actuator portion 26 for operating the key switch 7 when the key is depressed. Furthermore, a plate-like engagement protrusion 27 that engages with the let-off component 6 when a key is pressed is provided at the center of the upper surface of the hammer body 22 in the front-rear direction.

  The let-off component 6 is formed of a molded product of a predetermined elastic material (for example, a styrene-based thermoplastic elastomer) and is attached to the switch attachment portion 20 of the hammer support 4. The let-off component 6 obliquely extends rearward and downward from the switch mounting portion 20, and a head portion 28 is formed at a tip portion thereof via a constricted portion. The head portion 28 faces the engaging protrusion 27 of the hammer 5 in the key release state.

  The key switch 7 includes a switch board 29 made of a printed circuit board and a switch body 30 made of a rubber switch provided for each key 2 on the lower surface of the switch board 29. The switch board 29 has a rear end portion inserted into the switch mounting portion 20 and a front end portion and a central portion screwed to the switch mounting portion 20. In addition, the switch body 30 faces the actuator portion 26 of the hammer 5 with a slight gap in the key release state. Furthermore, a hammer stopper 31 made of foamed urethane or the like that restricts the upward rotation of the hammer 5 is provided at the front end of the lower surface of the switch mounting portion 20.

  Next, the operation of the keyboard apparatus 1 having the above configuration will be described. When the key 2 is pressed from the key release state shown in FIG. 1, the key 2 rotates about the balance pin 13 in the counterclockwise direction in FIG. 1, and accordingly, the hammer 5 moves the capstan screw 25. And pivots upward (clockwise in the figure) around the fulcrum shaft 21.

  During the rotation of the hammer 5, the engaging projection 27 engages with the head 28 of the let-off component 6 and presses the let-off component 6 while compressing the let-off component 6 through the head 28. The reaction force acting on the hammer 5 increases. As the rotation of the hammer 5 progresses, the engagement protrusion 27 is disengaged from the head 28, so that the reaction force from the let-off component 6 disappears rapidly. Due to the increase and disappearance of the reaction force of the let-off component 6, a let-off feeling similar to that of an acoustic piano can be obtained.

  Thereafter, the hammer 5 comes into contact with the hammer stopper 31 to complete the upward rotation of the hammer 5. During the upward rotation of the hammer 5, the actuator portion 26 presses the switch body 30 of the key switch 7 and turns on the key switch 7, thereby pressing the key 2 according to the rotation amount of the hammer 5. Key information is detected and output to a sound generation control device (not shown). The sound generation control device controls the sound generation of the electronic piano based on the detected key press information.

  After that, when the key 2 is released, the key 2 rotates in the opposite direction to that when the key is pressed, and returns to the key release state shown in FIG. 1, and the hammer 5 is also rotated downward and released. Return to the key state.

  Next, the control panel support structure according to the present invention will be described in detail. FIG. 2A shows a part of the keyboard chassis 3, and FIG. 3A shows the rib 10. A number of holes 40 are formed in the front rail 9 a of the keyboard chassis 3 corresponding to the front pins 14, and the front pins 14 extend upward while passing through the holes 40. Further, as shown in FIG. 2B, the front rail 9a is formed with two front and rear holes 41, 41 for screwing corresponding to each rib 10, and is positioned on the right side of each hole 41. A hole 42 is also formed. Similarly, in the middle rail 9b, two holes for screwing are formed corresponding to each rib 10, and a positioning hole is formed immediately to the right of the front hole. The rear rail 9c also has two front and rear holes for screwing corresponding to the ribs 10.

  As shown in FIG. 3 (a), the rib 10 has a predetermined length corresponding to the front rail 9a, the middle rail 9b, and the rear rail 9c, extending in the front-rear direction and having an L-shaped cross section. The upper end of the part is bent at a right angle to the right. Each of the two front and rear bent portions 43, 43 corresponding to the front rail 9a is formed with a screw hole 43a at a position corresponding to the screw fixing hole 41 of the front rail 9a, and for positioning the front rail 9a. A convex portion 43 b that slightly protrudes upward is formed by a half punch at a position corresponding to the hole 42. Similarly, screw holes 44a and 45a are formed in the front and rear two bent portions 44 and 45 corresponding to the middle rail 9b at positions corresponding to the screwing holes of the middle rail 9b, respectively. A convex portion 44b is formed at 44 at a position corresponding to the positioning hole of the middle rail 9b. Note that the front and rear screw holes 46a and 46a are also formed in the bent portion 46 corresponding to the rear rail 9c at positions corresponding to the front and rear screw fixing holes of the rear rail 9c.

  When assembling the keyboard chassis 3 so that the front rail 9a, the middle rail 9b, and the rear rail 9c configured as described above are connected by the rib 10, especially the front rail 9a and the middle rail 9b are on the rib 10 side. Are inserted into the positioning holes 42 on the front rail 9a and the middle rail 9b side, and the screw holes 43a and 44a on the rib 10 side are screwed to the front rail 9a and the middle rail 9b. And screwed in a state of matching with the hole 41 for use. By assembling the keyboard chassis 3 in this manner, the ribs 10 do not rotate with respect to the front rail 9a, the middle rail 9b, etc., when screwing, and the like. It can be connected easily and well. Further, the front rail 9a and the middle rail 9b can be easily positioned by engaging the convex portions 43b, 44b on the rib 10 side with the positioning holes 42 on the support rail 9 side, thereby making it possible to The chassis 3 can be assembled with high accuracy.

  The front bent portion 44 corresponding to the middle rail 9b of the rib 10 has a longer dimension in the front-rear direction than the other bent portions 43, 45 and 46, and is located in front of the screw hole 44a. A screw hole 44c is also formed. This screw hole 44c is for attaching to the rib 10 a panel support bracket 48 (panel support member) that supports the control panel 47 (see FIG. 3B) in the electronic piano.

  The control panel 47 is provided with a large number of operation units (not shown) for setting timbres, sound sources, and the like, and is formed in a horizontally long plate shape that extends in the left-right direction as a whole. Further, the control panel 47 has left and right ends supported by left and right arms (not shown) of an electronic piano, and a central portion in the left and right direction is provided with a connecting bracket 47a fixed to the back surface of the control panel 47. Through the panel support fitting 48.

  The panel support bracket 48 is formed by bending both ends of a long and narrow predetermined metal plate at right angles in opposite directions. As shown in FIG. 3A, the panel support bracket 48 has a screw-fastening hole 48a at the lower end and a screw hole 48b at the upper end. The panel support bracket 48 configured as described above is configured so that the lower end hole 48a is aligned with the screw hole 44c on the front side of the bent portion 44 corresponding to the middle rail 9b of the rib 10 by the screw 49. 10 is fixed. Further, when connecting the panel support bracket 48 and the control panel 47, the mounting hole (not shown) of the connection bracket 47a on the control panel 47 side is matched with the screw hole 48b at the upper end of the panel support bracket 48. In this state, the connection fitting 47a and the panel support fitting 48 are screwed.

  As described above in detail, according to the present embodiment, the panel support bracket 48 is attached to the rib 10 connecting the front rail 9a, the middle rail 9b, and the rear rail 9c. Is supported from below. The rib 10 is made of an iron plate that is significantly shorter and thicker than the front rail 9a and the middle rail 9b that are relatively long in the left-right direction, and is a panel support bracket attached to such a rib 10. Since the control panel 47 is supported via 48, the control panel 47 can be supported firmly and stably without significantly increasing the weight of the keyboard device 1 as a whole. Moreover, since the panel support bracket 48 is attached to the ribs 10 with screws 49, it can be attached to any of the five ribs 10 as well as to any ribs 10 as necessary. The degree of freedom of installation of the support bracket 48 can be increased.

  In addition, this invention can be implemented in various aspects, without being limited to the said embodiment described. For example, a portion corresponding to the panel support bracket 48 may be formed integrally with the rib 10. In this case, unlike the case where the panel support bracket 48 and the rib 10 are separately configured, it is not necessary to attach the panel support bracket 48 to the rib 10, and the labor for assembling the electronic piano can be reduced.

  In addition, the detailed configurations of the support rails 9, the ribs 10, and the panel support brackets 48 shown in the embodiments are merely examples, and can be appropriately changed within the scope of the gist of the present invention.

1 Keyboard device 2 Key 3 Keyboard chassis 9 Support rail 9a Front rail (front rail)
9b Middle rail (rear rail)
10 Rib (Rail connecting member)
47 Control panel 48 Panel support bracket (panel support member)

Claims (3)

An electronic keyboard instrument that includes a front rail and a rear rail that extend in the left-right direction and are spaced apart from each other in the front-rear direction and support a plurality of keys arranged in parallel in the left-right direction from below. A control panel support structure for an electronic keyboard instrument that supports a control panel disposed above the plurality of keys,
A rail connecting member extending in the front-rear direction and connecting the front rail and the rear rail;
A panel support member provided on the rail connecting member so as to extend upward, and supporting the control panel from below;
Equipped with a,
The front rail, the rear rail and the rail connecting member are made of a metal plate,
A control panel support structure for an electronic keyboard instrument, wherein the rail connecting member is formed of a metal plate that is thicker than the thickness of the front rail and the rear rail . The control panel support structure for an electronic keyboard instrument according to claim 1, wherein the panel support member is formed integrally with the rail connecting member. The rail connecting member is composed of a plurality of rail connecting members arranged at intervals in the left-right direction,
The control panel support structure for an electronic keyboard instrument according to claim 1, wherein each of the plurality of rail connecting members is configured to be capable of arbitrarily attaching the panel support member.

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