JP4811137B2 - Keyboard device - Google Patents

Description

  The present invention relates to a keyboard device used for a keyboard instrument such as an electronic organ or an electronic piano.

  Conventionally, for example, as shown in Patent Document 1 below, a plurality of keys are supported on a key frame at their rear ends so as to be swingable in the vertical direction, and have different inertia for each key or key range. A keyboard apparatus is known in which a plurality of swing levers having moments are supported by a key frame below a key so as to swing up and down by driving the key. In the keyboard device, when the key is pressed and released, the swing lever is brought into contact with the upper limit stopper member and the lower limit stopper member assembled with a predetermined interval in the vertical direction on the key frame, thereby In addition, the swing range of the swing lever is regulated.

Further, as shown in Patent Document 2 below, a plurality of keys are supported by a key frame so as to be swingable in the vertical direction at the intermediate portion thereof, and a plurality of moments of inertia that are different for each key or key range. There is also known a keyboard device in which a rocking lever is supported on a key frame at a position above and behind the key so as to rock up and down by driving the key. In this keyboard device, when the key is depressed, the lower surface of the rear end of the swing lever is brought into contact with a stopper member fixed to the key frame behind the key to restrict the lower limit of the front end of the key, and when the key is released The upper end of the front end of the key is regulated by bringing the lower surface of the rear end into contact with a stopper member fixed to the key frame below the key. Further, in this keyboard device, the lower limit stopper material of the stopper member provided behind the key has at least one of the material, hardness, thickness, size, arrangement, and shape elements to be different for each key range. The lever stop mode and return speed can be adjusted.
Japanese Patent Laid-Open No. 9-198037 Japanese Patent No. 3624777

  In the conventional keyboard device as described above, the rocking lever is configured to have a larger moment of inertia in the lower sound range, and the impact force applied to the upper limit stopper member and the lower limit stopper member at the time of key depression and key release is larger in the lower sound range. . The upper limit stopper member and the lower limit stopper member regulate key swinging at the time of key depression and key release, and give the player a key stop feeling at the time of key depression and key release. Is. Therefore, as in the former prior art, in the keyboard device in which the swing lever is supported by the key frame below the key, the upper limit stopper member and the lower limit stopper member are configured uniformly over the entire key range. If the upper limit stopper member and the lower limit stopper member are configured to be suitable for any one of the key ranges, the performer feels uncomfortable with the key stop feeling in the other key ranges. In the keyboard device in which the swing lever is supported on the key frame at a position above and behind the key as in the latter prior art, the material of the lower limit stopper member that restricts the swing of the key when the key is pressed, Although at least one of the elements of hardness, thickness, size, arrangement, and shape is different for each key range, the upper limit stopper member is configured uniformly over the entire key range, so the key at the time of key release In the stop feeling, the user feels uncomfortable as described above.

The present invention has been made to solve such a conventional disadvantages, and its object is to provide a keyboard apparatus was also good at any of the key range of the key stop feeling during the release key.

To achieve the above object, the present invention is characterized in that a plurality of keys and a plurality of keys are arranged below the plurality of keys, and the front portions of the plurality of keys swing vertically. A plurality of oscillating levers supported by the key frame so as to oscillate up and down by driving the key, respectively, with a key frame for supporting the rear end portion and a longitudinal direction arranged in the front-rear direction; a plurality of rocking levers having different moments of inertia for each or each key range key, provided apart in the vertical direction by a predetermined distance by contact with a plurality of rocking levers, key release of the front end of the plurality of keys In a keyboard device having a pair of stopper members that respectively regulate upward displacement at the time and downward displacement at the time of key depression , the front ends of the plurality of keys of the plurality of swing levers and the pair of stopper members When releasing the key That lies in the differently configured for each key or each key range the contact area between the stopper member for restricting the upward displacement of.

In this case, by changing the lengths of the plurality of swing levers in the front-rear direction, a stopper that restricts the upward displacement of the rear end portions of the plurality of swing levers and the front end portions of the plurality of keys when the keys are released. Different contact lengths in the front-rear direction with the member, the contact area between the plurality of swing levers and the stopper member that restricts the upward displacement of the front end portions of the plurality of keys at the time of key release for each key or It is better to make it different for each key range. Further, by changing the width in the front-rear direction of the stopper member that restricts upward displacement at the time of key release of the front end portions of the plurality of keys , the contact area is changed for each key or key range. You may make it differ for every. In addition to the front-rear direction of the length of said plurality of swing levers, each key or per key range in the longitudinal direction of the width of the stopper member for restricting the upward displacement of at key release of the front end of the plurality of keys The contact area may be made different for each key or key range. More specifically, the abutting area may be increased in the lower sound range.

In the present invention configured as described above, the contact area between the swing lever and the stopper member that restricts the upward displacement at the time of key release of the front end portions of the plurality of keys is made different for each key or key range. It was so so, it is possible to properly alleviate the different impact force per each key or key range, can give Oite upon key release, a good key stop feeling over the entire key range to the player. Further, in order to make the contact area between the swing lever and the stopper member that restricts the upward displacement at the time of key release of the front ends of the plurality of keys different for each key or key range, the front ends of the plurality of keys Since the front-rear width of the stopper member that restricts the upward displacement when the key is released is changed, or the front-rear length of the swing lever is changed, the above-mentioned good key can be obtained with a simple configuration. A sense of stop can be realized.

Further, in place of the above- described configuration in which the contact area between the swing lever and the stopper member that restricts upward displacement at the time of key release of the front end portions of the plurality of keys is different for each key or key range, a plurality of At least one of the structure and material of the stopper member that restricts the upward displacement of the front end of the key when the key is released may be different for each key or key range. This also can be properly mitigating the different impact force per each key or key range, the player can give Oite upon key release, a good key stop feeling performer over the entire key range.

  An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of the keyboard device according to the embodiment. 2A is a vertical side view of the keyboard device, and FIG. 2B is a vertical side view of the keyboard device showing a state where one white key is pressed. The keyboard device includes a plurality of keys 10 composed of white keys and black keys arranged in the horizontal direction. The plurality of keys 10 are assembled to a key frame 20 that is integrally formed of synthetic resin. The key frame 20 is fixed on a support base 30, and a plurality of swing levers 40 corresponding to the plurality of keys 10 are assembled to the key frame 20 below the plurality of keys 10.

  The key 10 is integrally formed of synthetic resin in a U-shaped cross-section with the lower part opened, and the rear end 11 is fitted into a recess provided at the rear end 21 of the key frame 20 and opened forward, and the rear end The front end portion 12 is supported by the key frame 20 so as to be swingable in the vertical direction with the side surface of the portion 11 as a fulcrum. A key guide 22 erected on the front end horizontal portion of the key frame 20 enters the front end portion 12 of the key 10 from below, and the front end portion 12 of the key 10 is vertically guided by the key guide 22 when the key is depressed. It is displaced to. Further, a long key stopper 23 with felt or the like superimposed on the front end horizontal portion is also extended and fixed in the lateral direction of the keyboard, and the stopper 23 restricts the downward displacement of the front end portion 12 of the key 10. However, the key stopper 23 does not restrict the downward displacement of the key 10 when the key is pressed normally during performance, and the front end lower end surface of the key 10 is separated from the upper surface of the key stopper 23 when the key is pressed normally. It is in. On the other hand, when a very large downward force is applied to the key 10, such as when a heavy object is placed on the key 10, the key stopper 23 regulates the downward displacement of the key 10. Thus, destruction due to abnormal deformation of the key 10 is prevented.

  On the lower surface of the front portion in the vicinity of the front end portion 12 of the key 10, a drive portion 13 is integrally formed so as to extend substantially vertically downward from the lower surface. The drive unit 13 is formed in a horizontal U-shape with the rear open, and the lower end is closed by a lower end 13a. An elastic member (not shown) is assembled on the lower surface of the lower end portion 13a.

  The swing lever 40 includes a lever base 41 made of synthetic resin and a mass body 42 made of metal. The lever base 41 is formed in a long and flat plate shape, and is arranged below the front portion of the key 10 with the longitudinal direction in the front-rear direction and the plate surface perpendicularly. The lever base 41 has a recess 41a whose axis is the lateral direction of the keyboard cut out at the center of the lower surface, and the recess 41a is formed thick in the axial direction. The recessed portion 41a is opened obliquely downward at the front and is assembled to the rotation support portion 25 provided at the upper end of the inclined plate 24 extending obliquely upward from the front lower end position of the key frame 20. The rotation support part 25 is extended in the keyboard lateral direction. Thereby, the swing lever 40 is supported by the key frame 20 so as to be swingable up and down.

  The swing lever 40 is biased forward (leftward in the figure) by a leaf spring 51. The leaf spring 51 engages with the concave portion 41 b of the lever base 41 at the front end, and enters the key 10 from the lower surface of the key 10 through the opening 26 provided in the intermediate portion of the key frame 20. The rear end portion of the leaf spring 51 is in contact with the inner surface of the rear end portion 11 of the key 10. At the front end of the lever base 41, a pair of legs 41c and 41d are formed that are divided into two forks in a vertical direction with a predetermined gap therebetween, and the upper leg 41c is shorter than the lower leg 41d. Is set. The lower end portion 13a of the drive unit 13 of the key 10 enters between the both leg portions 41c and 41d and engages with both leg portions 41c and 41d. Thus, when the key 10 is released, the front end of the key 10 is displaced upward due to the displacement of the front end of the swing lever 40 due to its own weight. On the other hand, when the key 10 is depressed, the lower end surface of the lower end portion 13a of the drive unit 13 presses the upper surface of the leg portion 41c, and the front end portion of the swing lever 40 is displaced downward.

  On the lower surface of the lever base 41, a switch driving portion 41e protruding downward is formed between the concave portion 41a and the leg portion 41d. The switch drive unit 41 e faces the switch 61 assembled on the printed circuit board 60 through the through window 24 a provided on the inclined plate 24. The printed circuit board 60 is assembled to the lower surface of the inclined plate 24 substantially in parallel with the same plate 24, and the switch 61 is provided for each key 10 and arranged in the lateral direction of the keyboard.

  The mass body 42 is formed in a rod shape, and is integrally assembled to the lever base 41 by outsert-molding the lever base 41 on the front outer periphery thereof. The rear part of the mass body 42 is folded and overlapped, and the weight of the mass body 42 is varied by changing the lengths of the bent portions 42a. Specifically, between the adjacent white key 10 and black key 10, the rotational moments above the pressed positions of the keys 10, 10 are set to be substantially equal. Further, in both the white key 10 and the black key 10, the mass body 42 that is heavier than the bass key is used, and the mass body 42 is set lighter toward the high-pitched sound side so that the rotational moment is low. It becomes smaller as it goes to the higher sound side.

  Further, a lower limit stopper member 70 extends in the lateral direction of the keyboard and is fixed to the upper surface of the support base 30 located at the rear end portion of the key frame 20. The lower limit stopper member 70 restricts the upward displacement of the front end portion of the key 10 when the key 10 is released by restricting the downward displacement of the rear end portion of the swing lever 40. In addition, on the lower surface of the upper surface plate 27 located at the rear end portion of the key frame 20, a long upper limit stopper member 80 extends downward in the horizontal direction of the keyboard with a predetermined distance from the lower limit stopper member 70 in the vertical direction. Is fixed. The upper limit stopper member 80 restricts the downward displacement of the key 10 when the key 10 is depressed by restricting the upward displacement of the rear end portion of the swing lever 40.

  Next, the configurations of the lower limit stopper member 70 and the upper limit stopper member 80 will be described in detail. Both the lower limit stopper member 70 and the upper limit stopper member 80 are configured by stacking a plurality of elastic shock absorbers such as felt one above the other, and as shown in FIG. Every one is different. In the present embodiment, the plurality of keys 10 are divided into four key ranges, and the widths in the front-rear direction of the lower limit stopper member 70 and the upper limit stopper member 80 are set to be the widest in the lowest range and narrower toward the high range. is doing. Note that this key range may be divided into a plurality of less than four key ranges, or may be divided into a plurality of more than four key ranges. In short, in the plurality of key ranges, the width in the front-rear direction of the lower limit stopper member 70 and the upper limit stopper member 80 may be wider as the low sound range and narrower as the high sound range. Further, for each key 10, the width in the front-rear direction of the lower limit stopper member 70 and the upper limit stopper member 80 may be set so that the bass is wider and the treble is narrower. Thereby, the contact area when the mass body 42 of the swing lever 40 contacts the lower limit stopper member 70 and the upper limit stopper member 80 is larger in the low sound range (low sound) and smaller in the high sound range (high sound).

  Next, the operation of the keyboard device configured as described above will be described. When the key 10 is not depressed, the rear end portion of the mass body 42 of the swing lever 40 is in contact with the lower limit stopper member 70 by its own weight, and the swing lever 40 and the key 10 are in the state shown in FIG. 2A. It is in. When the key 10 is pressed in this state, the key 10 starts to swing counterclockwise in FIG. 2A with the rear end 11 as a fulcrum against the weight of the mass body 42 of the swing lever 40. When the key 10 is depressed to a predetermined depth, the rear end portion of the mass body 42 abuts on the upper limit stopper member 80 as shown in FIG. 2B and the downward displacement of the front end portion of the key 10 is restricted. The When the key 10 is released, the rocking lever 40 is rotated by the weight of the mass body 42 until the rear end of the mass body 42 comes into contact with the lower limit stopper member 70. Swings in the direction and returns to the home position.

  According to the embodiment configured as described above, the contact area between the mass body 42 and the lower limit stopper member 70 and the upper limit stopper member 80 when the key 10 is released and pressed is determined for each key or key range. Different impact force for each key or key range can be moderated properly, and a good key stop feeling can be played over the entire key range both when pressing and releasing keys. Can be given to a person. In order to make the contact area between the mass body 42 and both the lower limit stopper member 70 and the upper limit stopper member 80 different for each key or key range, the length of the lower limit stopper member 70 and the upper limit stopper member 80 in the front-rear direction is different. Since the height varies depending on the key range, the above-described good key stop feeling can be realized with a simple configuration.

  Furthermore, in carrying out the present invention, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention.

  For example, in the above embodiment, the width in the front-rear direction of the lower limit stopper member 70 and the upper limit stopper member 80 is made different for each key or key range. However, instead of or in addition to this, the structures or materials of the lower limit stopper member 70 and the upper limit stopper member 80 may be different for each key or key range.

  For example, as shown in FIG. 3B, an elastic member layer 74 is interposed between one or more shock absorbing member layers 71, 72, 73 provided on the upper and lower sides of the lower limit stopper member 70 and the upper limit stopper member 80. Let The elastic member layer 74 is configured such that the lower the sound range, the larger the elastic coefficient, and the smaller the elastic coefficient as the sound range becomes higher. In the example of FIG. 3B, the elastic coefficient is made smaller in the order of the elastic member layers 74a, 74b, 74c, and 74d from the low sound range to the high sound range. As the material of the elastic member layer 74, felt may be used, but materials such as rubber and resin may be used. In this case as well, as in the case of the above-described embodiment, if the elastic coefficient is larger as the sound is low, the number of key ranges to be divided may be other than 4, or the elastic coefficient may be different for each key 10. . This also makes it possible to appropriately mitigate the impact force that varies from key to key or key range, and to give the player a good key stop feeling over the entire key range at both key pressing and key release. it can.

  As shown in FIG. 3C, as shown in FIG. 3B, the elastic member layers 74a, 74b, 74c, and 74d are made to have smaller elastic coefficients in the higher sound range, and the elastic member layers 74a, 74b, 74c, You may make it make 74d thickness (length of an up-down direction) small as a high sound region. Also in this case, as in the case of the above-described embodiment, if the elastic coefficient is larger and the thickness is larger as the sound is low, the number of key ranges to be divided may be other than 4, and the elastic coefficient and thickness may be different for each key 10. It may be. According to this, the impact force that varies from key to key or key range can be further appropriately mitigated, and a good key stop feeling is given to the performer over the entire key range both at the time of key depression and key release. be able to.

  Further, in the above embodiment, the lengths of the lower limit stopper member 70 and the upper limit stopper member 80 in the front-rear direction are made different for each key range or each key, so that the mass body 42 when the key 10 is released and pressed The contact area between the lower limit stopper member 70 and the upper limit stopper member 80 is made different for each key range or key. However, instead of this, as shown in FIGS. 4A to 4D, by adjusting the length of the bent portion 42a of the mass body 42, the length of the mass body 42 in the front-rear direction is changed for each key range. Therefore, the contact area between the mass body 42 and the lower limit stopper member 70 and the upper limit stopper member 80 when the key 10 is released or pressed may be changed for each key range or for each key. That is, by shortening the length of the mass body 42 (swing lever 40) in the front-rear direction from the low sound range to the high sound range, the mass body 42 and the lower limit stopper member 70 when the key 10 is released and pressed. The contact area with the upper limit stopper member 80 is reduced.

  Also in this case, the number of key ranges to be divided may be other than four, and the length of the mass body 42 (swing lever 40) may be different for each key 10. According to this, as in the above embodiment, the impact force that differs for each key or key range can be more appropriately mitigated with a simple configuration, and all keys can be pressed both at the time of key depression and at the time of key release. A good key stop feeling can be given to the performer over a wide range. Furthermore, in addition to making the lengths in the front-rear direction of the lower limit stopper member 70 and the upper limit stopper member 80 different for each key range or for each key as in the above embodiment, the length of the mass body 42 (swing lever 40). So that the contact area between the mass body 42 and the lower limit stopper member 70 and the upper limit stopper member 80 when the key 10 is released and pressed is different for each key range or for each key. In other words, the contact area may be decreased as the contact area becomes a high sound range (high sound).

  Moreover, in the said embodiment, the rocking | fluctuation lever 40 was comprised so that it might rock | fluctuate by engaging with the drive part 13 of the key 10 in the front-end part. However, instead of this, the swing lever 40 may be configured to swing by engaging with a drive portion provided in the key 10 at the rear end portion. Further, with respect to the contact between the lower limit stopper member 70 and the upper limit stopper member 80 and the swing lever 40 (mass body 42), the front end portion replaces the rear end portion of the swing lever 40 and the key 10 is released. You may make it contact | abut to the lower limit stopper member 70 and the upper limit stopper member 80 at the time of key pressing.

  Furthermore, in the above embodiment, the key stop feeling when the key 10 is pressed and released is improved, but only the key stop feeling when pressing the key is reduced for cost reduction. In this case, the contact area between the swing lever 40 (mass body 42) and the upper limit stopper member 80 when the key 10 is depressed is made different for each key range or for each key so that the higher sound range (high sound) becomes smaller. It is also possible. Specifically, the swing lever 40 (mass body 42) is changed by making the width in the front-rear direction of the upper limit stopper member 80, the length in the front-rear direction of the mass body 42, or both different for each key or key range. ) And the upper limit stopper member 80 are made smaller in the higher sound range (higher sound), the structure can be simplified and a minimum good key stop feeling can be obtained.

It is a top view of the keyboard apparatus which concerns on one Embodiment of this invention. It is a vertical side view of the keyboard device. It is a vertical side view of the keyboard device showing a state where one white key is pressed. It is a top view of a lower limit stopper member and an upper limit stopper member. It is a longitudinal cross-sectional view of the lower limit stopper member and upper limit stopper member which concern on a modification. It is a longitudinal cross-sectional view of the upper-lower stopper member and lower limit stopper member which concern on another modification. (A)-(D) are longitudinal cross-sectional views which show the rear part of the keyboard apparatus which concerns on a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Key, 20 ... Key frame, 30 ... Support stand, 40 ... Swing lever, 42 ... Mass body, 70 ... Lower limit stopper member, 80 ... Upper limit stopper member

Claims (4)

Multiple keys,
A key frame that is disposed below the plurality of keys and supports the rear ends of the plurality of keys such that the front portions of the plurality of keys swing vertically.
A plurality of oscillating levers arranged in the longitudinal direction and supported by the key frame so as to oscillate up and down when the key is driven, and each moment of inertia is different for each key or key range. A plurality of swing levers,
It is provided at a predetermined interval in the vertical direction, and by the contact with the plurality of swing levers, the front end portions of the plurality of keys are displaced upward when the key is released and downward when the key is pressed , respectively In a keyboard device having a pair of stopper members to be regulated ,
The contact area between the plurality of swing levers and the stopper member that restricts upward displacement of the pair of stopper members when the front end portions of the plurality of keys are released is for each key or key area. A keyboard device characterized by being configured differently. A stopper that regulates upward displacement of the rear end portions of the plurality of swing levers and the front end portions of the plurality of keys when the keys are released by making the lengths of the plurality of swing levers different in the front-rear direction. The contact length between the plurality of swing levers and the stopper member that restricts the upward displacement of the front end portions of the plurality of keys when the keys are released is changed by changing the length of contact with the member in the front-rear direction. The keyboard device according to claim 1, wherein the keyboard device is different for each key range or key range. By making each key or each key range in the longitudinal direction of the width of the stopper member for restricting the upward displacement of at key release of the front end portion of said plurality of keys, said plurality of rocking levers, wherein a plurality of The keyboard device according to claim 1 or 2, wherein a contact area with a stopper member that restricts upward displacement at the time of key release of the front end portion of the key is different for each key or key range. Multiple keys,
A key frame that is disposed below the plurality of keys and supports the rear ends of the plurality of keys such that the front portions of the plurality of keys swing vertically.
A plurality of oscillating levers arranged in the longitudinal direction and supported by the key frame so as to oscillate up and down when the key is driven, and each moment of inertia is different for each key or key range. A plurality of swing levers,
It is provided at a predetermined interval in the vertical direction, and by the contact with the plurality of swing levers, the front end portions of the plurality of keys are displaced upward when the key is released and downward when the key is pressed , respectively In a keyboard device having a pair of stopper members to be regulated ,
Of the pair of stopper members, at least one of the structure and material of the stopper member that restricts upward displacement at the time of key release of the front end portions of the plurality of keys is made different for each key or key range. A keyboard device characterized by comprising.

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