JP5735893B2 - Electronic keyboard instrument hammer device - Google Patents

Electronic keyboard instrument hammer device Download PDF

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Publication number
JP5735893B2
JP5735893B2 JP2011214411A JP2011214411A JP5735893B2 JP 5735893 B2 JP5735893 B2 JP 5735893B2 JP 2011214411 A JP2011214411 A JP 2011214411A JP 2011214411 A JP2011214411 A JP 2011214411A JP 5735893 B2 JP5735893 B2 JP 5735893B2
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hammer
key
width
fulcrum shaft
support
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JP2013073205A (en
Inventor
鈴木 昭裕
昭裕 鈴木
秀行 石田
秀行 石田
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株式会社河合楽器製作所
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Priority to JP2011214411A priority Critical patent/JP5735893B2/en
Priority claimed from DE102012217635A external-priority patent/DE102012217635A1/en
Publication of JP2013073205A publication Critical patent/JP2013073205A/en
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Description

  The present invention is applied to an electronic keyboard instrument such as an electronic piano, and relates to a hammer device for an electronic keyboard instrument provided with a hammer that rotates in conjunction with a pressed key.
  Conventionally, as this type of hammer device, for example, the one disclosed in Patent Document 1 already filed by the present applicant is known. This hammer device is applied to a keyboard device of an electronic piano, and is arranged in a state in which the action chassis formed by metal extrusion and the action chassis are rotatably supported and aligned in the left-right direction. With a plurality of hammers. The action chassis includes a hammer support portion having a fulcrum shaft portion extending in the left-right direction, and a switch mounting portion provided above the hammer support portion and extending obliquely upward and forward. A key switch for detecting key pressing information is attached to the switch attachment portion. The key switch is composed of a switch board made of a printed circuit board and a plurality of switch bodies each made of a rubber switch provided for each hammer on the lower surface of the switch board.
  On the other hand, the hammer is provided for each key, and has an arm-shaped hammer body extending in the front-rear direction and a weight attached to the front end of the hammer body. A shaft hole with a C-shaped side surface is formed at the rear end of the hammer body, and the hammer is detachably engaged with the fulcrum shaft of the action chassis. Is supported so as to be rotatable in the vertical direction. Further, the hammer body is provided with an actuator portion that presses the switch body of the key switch from below when the key is depressed, at an upper portion immediately in front of the shaft hole.
JP 2010-262129 A
  In the hammer device configured as described above, in general, grease or the like is applied as a lubricant to the entire fulcrum shaft portion of the action chassis in order to ensure smooth rotation of each hammer. Further, when the hammer is removed from the action chassis during maintenance or the like, it is necessary to attach the hammer to the action chassis. When the hammer is attached, the hammer actuator may come into contact with the fulcrum shaft when the hammer shaft hole is engaged with the fulcrum shaft. In this case, the grease applied to the fulcrum shaft However, there is a possibility of adhering to the actuator part. In this case, if the hammer is attached to the action chassis while the grease is attached to the actuator portion of the hammer, the following problem occurs.
  That is, when the electronic piano is played, the hammer corresponding to the pressed key is rotated upward, the actuator unit presses the switch body, and then the hammer is rotated downward with the release of the key. Return to the key state. However, when the actuator part of the hammer moves away from the pressed switch body, the rubber switch body is pulled slightly toward the actuator part side due to the adhesive force of the grease adhering to the actuator part. Noise may occur. Such noise interferes with the performance of the electronic piano. Of course, when the hammer is attached to the action chassis, it is possible to avoid adhesion of grease to the actuator portion by attaching it carefully so that the actuator portion does not contact the fulcrum shaft portion. However, in this case, when it is necessary to attach a large number of hammers, the installation work is troublesome. Therefore, there is room for improvement in the above-described hammer device.
  The present invention has been made in order to solve the above-described problems, and can prevent grease from adhering to the actuator portion when the hammer is attached, whereby the hammer can be attached quickly. An object of the present invention is to provide a hammer device for an electronic keyboard instrument that can improve the workability.
  In order to achieve the above object, the invention according to claim 1 is directed to a hammer support and a key that is pressed while being supported by the hammer support in a state of being aligned in the left-right direction and being pivotable. A hammer device for an electronic keyboard instrument comprising a plurality of hammers that rotate in conjunction with each other, wherein the hammer supports are arranged with a predetermined first width in the left-right direction, and each of the plurality of hammers partitioning the plurality of hammers. A plurality of fulcrum shaft portions that are provided so as to extend in the left-right direction between each partition wall and adjacent partition walls, and each support a plurality of hammers in a rotatable manner, and near the left and right ends of each fulcrum shaft portion Left and right stoppers arranged with a predetermined second width smaller than the first width in the left-right direction. Each hammer is formed in an arm shape extending in the front-rear direction. An engaging portion that is provided at the rear end portion and has a width dimension in the left-right direction smaller than the second width, and is rotatably and detachably engaged with the fulcrum shaft portion; Provided on the front side, the hammer rotates as the corresponding key is pressed, so that the actuator part that presses the key switch for detecting key pressing information and the actuator part on the left and right side surfaces are respectively Left and right protrusions, and the left and right protrusions are respectively attached to the left and right stoppers when the engaging portion is engaged with the fulcrum shaft when the hammer is attached to the hammer support. By contacting, the actuator unit is configured to prevent the actuator unit from contacting the fulcrum shaft unit.
  According to this structure, when attaching a hammer to a hammer support, the engaging part of the rear-end part of a hammer is engaged with the fulcrum shaft part provided between the partition walls adjacent to a hammer support. In this case, the left and right stoppers having a second width smaller than the first width between adjacent partition walls are provided in the vicinity of the left and right ends of the fulcrum shaft portion of the hammer support, while the hammer engaging portion Has a width dimension smaller than the second width, the hammer engaging portion is allowed to enter between the partition walls and between the left and right stoppers, and can engage the fulcrum shaft portion. The left and right sides of the hammer are provided with left and right protrusions in the vicinity of the actuator for pressing the key switch, and these protrusions abut against the left and right stoppers, respectively. This prevents the actuator portion from coming into contact with the fulcrum shaft portion. Thus, when the hammer is attached to the hammer support, the actuator portion can be prevented from coming into contact with the fulcrum shaft portion when the engagement portion of the hammer is engaged with the fulcrum shaft portion of the hammer support. Even when grease or the like is applied as a lubricant to the fulcrum shaft portion, it is possible to prevent the grease from adhering to the actuator portion. Thereby, compared with the case where a hammer is attached while paying attention to prevent grease from adhering to the actuator portion, the attaching operation of the hammer can be performed quickly, and the workability thereof can be improved.
  According to a second aspect of the present invention, in the hammer device for an electronic keyboard instrument according to the first aspect, the width dimension in the left-right direction between the tips of the left and right protrusions of each hammer is smaller than the first width and the second width. It is characterized by being set larger than the above.
  According to this configuration, since the width dimension in the left-right direction between the tips of the left and right protrusions of the hammer is smaller than the first width between the adjacent partition walls, the hammer actuator portion can enter between the partition walls. Permissible. Further, since the width dimension of the left and right protrusions of the hammer is larger than the second width between the left and right stoppers, the hammer actuator portion is prevented from entering between the stoppers. Thus, by setting the width dimension between the adjacent partition walls of the hammer support and between the left and right stoppers, and the width dimension of the left and right protrusions of the hammer as described above, the above-described operation of claim 1, The effect can be easily realized.
It is a side view which shows the keyboard apparatus of the electronic piano to which the hammer apparatus by one Embodiment of this invention is applied, in the state which partly notched. It is a perspective view which shows a hammer support, (a) shows the whole hammer support for 1 octave, (b) shows the state which notched one part. It is a figure which shows a hammer support, (a) is a top view, (b) is a front view. It is a figure which shows a hammer, (a) is a top view, (b) is a side view. It is explanatory drawing for demonstrating the relationship of the width dimension of the left-right direction with the partition wall and stopper wall of a hammer support, and the protrusion of a hammer. (A) And (b) is a figure which shows the state which the protrusion of the hammer contact | abutted from the front and the downward | lower direction, respectively, when attaching a hammer to a hammer support.
  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 hammer device 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 is composed of three support rails 9 including a front rail 9a, a middle rail 9b, and a rear rail 9c extending in the left-right direction, and five reinforcing ribs 10 extending in the front-rear direction, in a cross-beam shape. It 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 (engagement portion) is formed at the rear end portion of the hammer body 22, and the hammer 5 is configured such that the shaft hole 24 engages with the fulcrum shaft portion 21, whereby the hammer support 4. It is rotatably supported by.
  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 hammer device according to the present invention will be described in detail. 2 and 3 show the hammer support 4 for one octave. As described above, the hammer support 4 is formed of a synthetic resin molded product, and has a plurality of partition walls 51 that partition adjacent hammers 5 with a predetermined interval in the left-right direction. . Each partition wall 51 corresponds to the hammer support portion 19 and has a side wall shape that is formed in a substantially rectangular shape with a vertically long side surface. The partition wall 51 corresponds to the switch mounting portion 20 and is connected to the upper front end of the square wall 52. A side wall is formed of a triangular wall 53 having a substantially triangular shape. In this hammer support 4, all the rectangular walls 52 have lower front end portions and lower end portions continuous in the left-right direction, and upper rear end portions continue in the left-right direction via the back wall portion 54. Yes. On the other hand, the upper half of the upper half of each triangular wall 53 is connected in the left-right direction via the upper wall 55.
  A plurality of board locking portions 54 a projecting obliquely upward and forward are appropriately provided near the upper end of the square wall 52 at the upper front end portion of the back wall portion 54. The board is locked in a state where the rear end of the switch board 29 of the key switch 7 is inserted between the board locking parts 54 a and the respective square walls 52.
  The upper wall portion 55 is provided with a plurality of (two in this embodiment) screwing portions 56 having a screw hole 56a and protruding upward by a predetermined length at the upper surface front end portion, while the upper surface rear end portion. In addition, a plurality of (three in this embodiment) substrate support portions 57 projecting upward by a predetermined length are provided. Each substrate support portion 57 is composed of a pair of protrusions slightly spaced in the left-right direction, and a screw hole 57a is formed between both protrusions. The upper wall 55 is formed with a plurality of mounting holes 58 for mounting the let-off component 6 between the adjacent partition walls 51 and 51 (triangular walls 53 and 53). Note that the opening 59 formed at the rear of each mounting hole 58 of the upper wall portion 55 has an engagement protrusion 27 of the hammer 5 that engages with the let-off component 6 when the hammer 5 rotates upward. This is to avoid hitting the portion 55.
  Further, between the adjacent partition walls 51, 51, the fulcrum shaft portion 21 extending in the left-right direction is provided at a portion where the square wall 52 and the triangular wall 53 are connected. In addition, each partition wall 51 has a stopper wall 60 that has a predetermined shape larger than the cross section of the fulcrum shaft portion 21 and slightly protrudes toward the fulcrum shaft portion 21 between the end portions of the fulcrum shaft portion 21. (Stopper) is provided. As described above, the hammer 5 is rotatably supported on the fulcrum shaft portion 21. Each fulcrum shaft portion 21 is coated with grease or the like as a lubricant in order to ensure smooth rotation of the hammer 5.
  FIG. 4 shows the hammer 5. As shown in the figure, the hammer body 22 is basically configured symmetrically and has a predetermined side shape as shown in FIG. The front end portion of the hammer body 22 is a plate-like weight attaching portion 41, and plate-like weight plates 23 and 23 are attached to the left and right side surfaces of the weight attaching portion 41 by rivets 42. Further, three concave portions 43 including a front concave portion 43a, a middle concave portion 43b, and a rear concave portion 43c are arranged in parallel along the length direction of the hammer main body 22 in a portion on the rear side of the weight attaching portion 41 of the hammer main body 22. Has been. The front concave portion 43a, the middle concave portion 43b, and the rear concave portion 43c are formed on the left and right side surfaces of the hammer main body 22, and are provided on almost the entire side surface except for the respective peripheral edge portions.
  The shaft hole 24 provided at the rear end portion of the hammer body 22 is formed in a C shape whose side surface shape opens upward, and a guide portion 44 formed so as to spread outward in the open portion. Is provided. Further, the actuator portion 26 provided in the hammer body 22 is formed to have a predetermined length that is located immediately in front of the shaft hole 24 and above the shaft hole 24 and extends in the front-rear direction.
  Further, left and right protrusions 45 and 45 (protrusions) are provided on the left and right side surfaces of the hammer body 22 near the rear end of the actuator portion 26. These protrusions 45 are for preventing the actuator portion 26 of the hammer 5 from coming into contact with the fulcrum shaft portion 21 of the hammer support 4 when the hammer 5 is attached to the hammer support 4.
  FIG. 5 shows the relationship of the width dimension in the left-right direction between the partition wall 51 and the stopper wall 60 of the hammer support 4 and the protrusion 45 of the hammer 5. As shown in the drawing, the width H in the left-right direction of the rear end portion (shaft hole 24) of the hammer 5 is defined as a lateral width W1 (first width) between adjacent partition walls 51, 51, and left and right stopper walls 60. , 60 is set smaller than the horizontal width W2 (second width) (H <W2 <W1). Further, the width dimension T between the left and right protrusions 45, 45 of the hammer 5 is set to be smaller than the lateral width W1 between the partition walls 51, 51 and larger than the lateral width W2 between the stopper walls 60, 60. (W2 <T <W1).
  Next, the operation of attaching the hammer 5 to the hammer support 4 will be described. When the hammer 5 removed from the hammer support 4 at the time of maintenance of the keyboard device 1 is attached to the hammer support 4 again, first, the shaft hole 24 at the rear end is brought close to the hammer support 4 from the front and adjacent to it. Insert between partition walls 51, 51. Next, the open portion of the shaft hole 24 of the hammer 5 is positioned below the fulcrum shaft portion 21 between the partition walls 51 and 51. Then, the shaft hole 24 is moved upward while being guided to the fulcrum shaft portion 21 by the guide portion 44 of the open portion, and is engaged with the fulcrum shaft portion 21 (see FIG. 1).
  In this case, for example, when the hammer 5 is inserted between the adjacent partition walls 51 and 51 in a state where the actuator portion 26 of the hammer 5 is positioned at substantially the same height as the fulcrum shaft portion 21 of the hammer support 4, FIG. As shown to (a), the protrusions 45 and 45 on either side of the hammer 5 contact | abut to the stopper walls 60 and 60 from the front, respectively. As a result, further movement of the hammer 5 including the actuator portion 26 is prevented. For this reason, the actuator part 26 does not contact the fulcrum shaft part 21.
  Further, when the shaft hole 24 is moved upward in a state where the actuator portion 26 of the hammer 5 is lower than the fulcrum shaft portion 21 of the hammer support 4 and the shaft hole 24 is located behind the fulcrum shaft portion 21, As shown in FIG. 6B, the left and right protrusions 45, 45 of the hammer 5 abut against the stopper walls 60, 60 from below. Thereby, further upward movement of the rear end portion of the hammer 5 including the actuator portion 26 is prevented. For this reason, the actuator part 26 does not contact the fulcrum shaft part 21 as in the above case.
  As described above in detail, according to the present embodiment, when the hammer 5 is attached to the hammer support 4, when the shaft hole 24 of the hammer 5 is engaged with the fulcrum shaft portion 21 of the hammer support 4, The actuator portion 26 does not come into contact with the fulcrum shaft portion 21 of the hammer support 4, thereby preventing the grease of the fulcrum shaft portion 21 from adhering to the actuator portion 26. Thereby, compared with the case where the hammer 5 is attached while paying attention to prevent the grease from adhering to the actuator portion 26, the attaching operation of the hammer 5 can be performed quickly, and the workability thereof can be improved.
  In addition, this invention can be implemented in various aspects, without being limited to the said embodiment described. In the embodiment, the stopper wall 60 corresponding to the stopper of the present invention is formed in a wall shape between the partition wall 51 and the fulcrum shaft portion 21, but the stopper of the present invention is not limited to this, and the hammer 5 As long as the actuator portion 26 can be prevented from coming into contact with the fulcrum shaft portion 21 of the hammer support 4, various types can be adopted. For example, the stopper of the present invention may extend along the outer peripheral edge of the stopper wall 60 and protrude from the partition wall 51.
  In the embodiment, the left and right protrusions 45, 45 of the hammer 5 are formed in a convex shape with a circular cross section, but may be formed to extend in the front-rear direction along the actuator portion 26, for example. Further, the detailed configurations of the hammer support 4 and the hammer 5 shown in the embodiment are merely examples, and can be appropriately changed within the scope of the gist of the present invention.
1 Keyboard device 2 Key 4 Hammer support 5 Hammer 7 Key switch 22 Hammer body 24 Shaft hole (engaging part)
26 Actuator 45 Projection (projection)
51 Partition wall 60 Stopper wall (stopper)
W1 Horizontal width between partition walls (first width)
W2 Horizontal width between stopper walls (second width)
H Width of hammer rear end T Width between protrusion tips

Claims (2)

  1. An electronic keyboard instrument comprising a hammer support and a plurality of hammers that are rotatably supported in a state aligned with the hammer support in the left-right direction and that rotate in conjunction with the depressed key. Hammer device,
    The hammer support is
    A plurality of partition walls arranged with a predetermined first width in the left-right direction and partitioning each of the plurality of hammers;
    A plurality of fulcrum shaft portions that are respectively provided so as to extend in the left-right direction between the adjacent partition walls, and rotatably support the plurality of hammers;
    Left and right stoppers provided near the left and right ends of each fulcrum shaft, respectively, and arranged with a predetermined second width smaller than the first width in the left-right direction;
    Have
    Each hammer is formed in an arm shape extending in the front-rear direction,
    An engaging portion that is provided at a rear end portion and has a width dimension in the left-right direction smaller than the second width, and is rotatably and detachably engaged with the fulcrum shaft portion;
    An actuator portion that is provided on the front side of the engaging portion and that presses a key switch for detecting key pressing information of the key by rotating the hammer with the pressing of the corresponding key;
    Left and right protrusions respectively protruding in the vicinity of the actuator portions on the left and right side surfaces;
    Have
    The left and right projecting portions contact the left and right stoppers when the engaging portion is engaged with the fulcrum shaft portion when the hammer is attached to the hammer support, so that the actuator portion Is configured to prevent contact with the fulcrum shaft portion.
  2.   The width dimension of the left-right direction between the front-end | tips in the said right and left protrusion part of each said hammer is set smaller than the said 1st width | variety, and larger than the said 2nd width | variety. Electronic keyboard instrument hammer device.
JP2011214411A 2011-09-29 2011-09-29 Electronic keyboard instrument hammer device Active JP5735893B2 (en)

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Application Number Priority Date Filing Date Title
JP2011214411A JP5735893B2 (en) 2011-09-29 2011-09-29 Electronic keyboard instrument hammer device

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2011214411A JP5735893B2 (en) 2011-09-29 2011-09-29 Electronic keyboard instrument hammer device
DE102012217635A DE102012217635A1 (en) 2011-09-29 2012-09-27 Hammer device for electronic keyboard instrument
CN201210366887.7A CN103035232B (en) 2011-09-29 2012-09-28 Hammer device for electric keyboard instrument
CN201710294382.7A CN107016984B (en) 2011-09-29 2012-09-28 Hammer device for electronic keyboard instrument
CN201710296509.9A CN107068126B (en) 2011-09-29 2012-09-28 Hammer device for electronic keyboard instrument
US13/631,276 US8530732B2 (en) 2011-09-29 2012-09-28 Hammer device for electronic keyboard instrument

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JP2013073205A JP2013073205A (en) 2013-04-22
JP5735893B2 true JP5735893B2 (en) 2015-06-17

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JP6315211B2 (en) * 2014-03-20 2018-04-25 カシオ計算機株式会社 Keyboard instrument
JP6460396B2 (en) * 2014-03-20 2019-01-30 カシオ計算機株式会社 Action mechanism of keyboard instrument

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JPH03264997A (en) * 1990-03-15 1991-11-26 Casio Comput Co Ltd Keyboard device of electronic keyboard musical instrument
JP2550103Y2 (en) * 1992-03-10 1997-10-08 株式会社河合楽器製作所 Electronic musical instrument fulcrum device
JP4124344B2 (en) * 2003-05-16 2008-07-23 ローランド株式会社 hammer

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