JP5652102B2 - Electronic musical instrument key - Google Patents

Description

  The present invention relates to a key for an electronic musical instrument having a concavo-convex pattern formed on the surface thereof.

  2. Description of the Related Art Conventionally, among keys provided in an electronic musical instrument, there are those in which concave and convex patterns such as an ivory pattern and a wood grain pattern can be visually recognized in order to improve aesthetic appearance (see, for example, Patent Document 1). This key is constructed by adhering and fixing a key top member made of a semitransparent synthetic resin member with an adhesive layer on a key body made of a synthetic resin in the shape of a white key. A plurality of concave grooves and protrusions are integrally formed. In contrast, a plurality of protrusions and troughs are integrally formed on the upper surface of the adhesive layer. For this reason, a part of the light irradiated on the upper surface of the key passes through the inside of the key top member, is reflected by the contact surface between the key top member and the adhesive layer, and passes through the inside of the key top member again. Released outside. At this time, the user can see a striped pattern, a wavy pattern, or a wood grain pattern according to the shape of the unevenness formed on the key top member and the adhesive layer.

JP 2009-237453 A

  However, with the conventional key described above, the uneven pattern can be visually recognized, but since the surface of the key is a smooth surface, the unevenness cannot be sensed by touch, and there is a difference between visual and touch. I get out and feel uncomfortable. In addition, the wood grain pattern used in the above-described conventional key represents an annual ring composed of a plurality of rings, and is not suitable as an uneven pattern used in a long and narrow key.

  The present invention has been made in order to cope with the above-described problems, and an object of the present invention is to provide an electronic musical instrument having a grain pattern suitable for a key that can sense irregularities and changes thereof both visually and tactilely. Is to provide the key. In the description of each constituent element of the present invention below, the reference numerals of corresponding portions of the embodiment are shown in parentheses in order to facilitate understanding of the present invention. The present invention should not be construed as being limited to the configurations of the corresponding portions indicated by the reference numerals of the forms.

To achieve the above object, features of configuration Naruue key of an electronic musical instrument according to the present invention, the uneven pattern (62) Electronic musical instrument keys are formed (60) on the upper surface (61) also rather small The concavo-convex pattern is composed of a plurality of linear portions including at least one of a linear portion (62a) made of a concave portion extending in the longitudinal direction of the key and a linear portion made of a convex portion extending in the longitudinal direction of the key , Jo Tokoro of the line portion to each other is in that so as to exchange differences. In the present invention, the predetermined linear portions preferably intersect at an intersection angle of 10 degrees or less. Furthermore, it is more preferable that the plurality of linear portions include portions having different line widths and uneven heights.

  In the key of the electronic musical instrument according to the present invention, each of the plurality of linear portions is not a linearly extending linear shape, but is formed in a complicated shape including portions having different line widths and uneven heights. The predetermined linear portions of the linear portions having different shapes intersect with each other at an intersection angle of 10 degrees or less. In general, wood does not intersect with each other in wood or fibers, but in the present invention, a plurality of linear portions are intentionally crossed in order to change the uneven pattern. Furthermore, since each linear part was formed in the complicated shape containing the part from which line | wire width and uneven | corrugated height differ, an uneven | corrugated pattern becomes rich in change.

  Even when the linear portions intersect with each other in this way, an uneven pattern that can be recognized as an actual wood grain can be obtained by setting the intersection angle of the linear portions to a small angle of 10 degrees or less. In addition, since the uneven pattern in this case can be easily formed by sanding or the like, there is an advantage that the production efficiency can be improved. In this case, the crossing angle of each linear part is preferably set to 5 degrees or less, more preferably 1 degree or less.

It is the perspective view which showed the white key which concerns on 1st Embodiment of this invention. It is the perspective view which showed the uneven | corrugated pattern formed in the upper surface part of the white key shown in FIG. It is the perspective view which showed the black key which concerns on 2nd Embodiment of this invention. It is the elements on larger scale which showed the uneven | corrugated pattern formed in the upper surface part of the white key which concerns on 3rd Embodiment of this invention. It is the elements on larger scale which showed the uneven | corrugated pattern formed in the upper surface part of the white key which concerns on 4th Embodiment of this invention. It is the elements on larger scale which showed the uneven | corrugated pattern formed in the upper surface part of the white key which concerns on 5th Embodiment of this invention. It is the elements on larger scale which showed the uneven | corrugated pattern formed in the upper surface part of the white key which concerns on 6th Embodiment of this invention. It is the perspective view which showed a part of white key which concerns on 7th Embodiment of this invention.

(First embodiment)
Hereinafter, a key of an electronic musical instrument according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a white key 10 according to the embodiment. A plurality of white keys 10 are arranged together with a black key on the front side (performer side) on the upper surface of an electronic musical instrument (not shown), and each of the white keys 10 is installed with its longitudinal direction facing forward and backward. The white key 10 is formed by integrally molding a hard synthetic resin, and includes an upper surface portion 11, a pair of left and right side surface portions 12 (only one is shown), and a front surface portion 13. . A notch recess 11a for arranging a black key is formed on the rear side of the left side of the upper surface portion 11, and a step portion 11b that is lower than the front side is formed on the rear surface of the upper surface of the upper surface portion 11. ing. The step portion 11b is used when the white key 10 is swingably supported by the main body of the electronic musical instrument. The position of the notch recess 11a varies depending on the position where the white key is assigned on the keyboard, and the notch recess is not provided in the white key not adjacent to the black key.

  The front surface portion 13 is configured by a substantially square plate-like portion that extends downward slightly from the rear portion of the front end edge portion of the upper surface portion 11. One of the pair of left and right side surface portions 12 (the side surface portion 12 located on the near side in FIG. 1) is composed of an L-shaped plate-shaped portion, and the outer edge portion on the long side of the L shape is the right side of the upper surface portion 11. The upper surface portion 11 and the front surface portion 13 are integrally assembled with the outer edge portion on the short side of the L shape along the right side portion of the front surface portion 13. Further, the other side surface portion 12 is formed in the same L shape as the side surface portion 12 in a side view, and the upper edge portion is formed on the front side of the left side portion of the upper surface portion 11 and the edge portion of the notch recess portion 11a. It is composed of a stepped plate-like portion having a front edge portion along the left side portion of the front surface portion 13.

  Concave and convex patterns 14 are respectively formed on the surfaces of the upper surface portion 11 and the pair of side surface portions 12 of the white key 10. The concavo-convex pattern 14 is formed in a wood grain pattern by arranging a plurality of linear protrusions 14 a extending in the front-rear direction of the white key 10 with a spacing left and right or up and down. Each linear convex part 14a is comprised by what extended substantially linearly, or what extended curvedly. The concavo-convex pattern 14 formed on the upper surface portion 11 is configured as shown in FIG. 2, and the length between the linear convex portions 14 a indicated by arrows a and b is the front side portion of the upper surface portion 11. It is formed so as to have a length that is less than half of the width of. Further, the length between the linear convex portions 14a in the concavo-convex pattern 14 formed on each of the pair of side surface portions 12 is also set to be not more than half the width of the front side portion of the upper surface portion 11, and each linear convex portion The part 14a is formed.

  The width of the front side portion of the upper surface portion 11 of the white key 10 is 22.7 mm, and the width of the rear side portion of the upper surface portion 11 is 12.5 mm. On the other hand, the protrusion length from the surface flat part of the upper surface part 11 and the side part 12 in each linear convex part 14a is 0.01 mm-1 mm, respectively, Preferably it is 0.02 mm-0.5 mm, More preferably, it is 0. .05 mm to 0.3 mm, and the spacing in the width direction or height direction of the white key 10 in each linear protrusion 14 a is 0.03 mm to 22 mm, preferably 0.05 mm to 12 mm, and more preferably 0. It is set to 08 mm to 8 mm.

  Since the concavo-convex pattern 14 is composed of a plurality of linear convex portions 14a that are spaced in this way, when the white key 10 is viewed from the front, about 1 to 756 linear convex portions 14a are formed. The concavo-convex pattern 14 of the white key 10 looks like a grain pattern that appears on the actual cut surface of the wood. Note that the injection molding machine that integrally molds the white key 10 is provided with a mold composed of a fixed mold and a movable mold, and a concave / convex pattern corresponding to the concave / convex pattern 14 is formed on the molding surface of the mold. A concavo-convex pattern in which the concavo-convex pattern is opposite to the pattern 14 is formed. For this reason, the white key 10 can be easily formed.

  When playing an electronic musical instrument equipped with the white key 10, first, the concave and convex pattern 14 formed on the upper surface portion 11 is seen, and when the key pressing operation is performed, the side surface portion 12 of the adjacent white key 10 is displayed. The formed concavo-convex pattern 14 can be seen. For this reason, the aesthetics of the electronic musical instrument is improved, and the concave / convex pattern 14 appears to change during the key pressing operation, which makes the performance fun. Further, when the key is pressed, a touch with the concavo-convex pattern 14 on the upper surface portion 11 also changes the tactile sensation, which is interesting.

  As described above, in the white key 10 according to the present embodiment, the concavo-convex pattern 14 including the plurality of linear convex portions 14a is formed on the surfaces of the upper surface portion 11 and the side surface portion 12, and the lines constituting the concavo-convex pattern 14 are formed. The interval between the convex portions 14 a is set to a length of 50% or less of the width of the front side portion of the upper surface portion 11 of the white key 10. For this reason, when the white key 10 is viewed from the front, at least two linear protrusions 14a can be seen, and it is possible to obtain a visual sense and a tactile sensation as if the key was composed of real timber. it can.

  In this embodiment, the concavo-convex pattern 14 is provided on all of the upper surface portion 11 and the pair of side surface portions 12, but this may be provided on any part of the upper surface portion 11 and the pair of side surface portions 12. . For example, when the concave / convex pattern 14 is provided only on the side surface portion 12, it has the same appearance as an electronic musical instrument with a white key on which the concave / convex pattern 14 is not formed when the performance is not performed. The pattern 14 becomes visible, and the interestingness is further increased. In addition, when emphasizing the sense of touch, the uneven pattern 14 may be provided only on the upper surface portion 11.

  Moreover, in this embodiment, although the uneven | corrugated pattern 14 is comprised with the some linear convex part 14a, it may replace with the linear convex part 14a and may comprise an uneven | corrugated pattern with a groove-shaped linear recessed part. . Furthermore, you may comprise an uneven | corrugated pattern by both the linear convex part 14a and a linear recessed part. Further, the plurality of linear convex portions 14a may be all curved lines or all straight lines. Moreover, the direction in which each linear convex part 14a inclines with respect to the longitudinal direction of the white key 10 may be opposite to the illustrated direction. Furthermore, when the white key 10 is molded, the color of the white key 10 may be partially different using two color resin materials. For example, when a light brown resin material and a slightly dark brown resin material are used, the concavo-convex pattern 14 becomes closer to a wood pattern. Further, the key forming the uneven pattern 14 may be a black key instead of the white key 10, or both the white key 10 and the black key.

(Second Embodiment)
FIG. 3 shows a black key 20 according to the second embodiment of the present invention. The black key 20 includes a key body portion 21 and a key top portion 22. The key main body 21 is formed in an elongated square frame shape with an open bottom surface, and a main body upper surface portion 21a is formed at the upper portion on the rear side. The key top portion 22 is formed at the upper portion of the front side portion where the upper portion of the key body portion 21 is opened, and includes an upper surface portion 23, a pair of left and right side portions 24 (only one is shown), and an inclined surface. And a rear surface portion (not shown).

  Concave and convex patterns 26 are respectively formed on the surfaces of the upper surface portion 23 and the pair of side surface portions 24 of the key top portion 22, and the front surface portion 25 is constituted by a smooth surface. The concavo-convex pattern 26 is formed in a wood grain pattern by arranging a plurality of linear convex portions 26 a extending in the front-rear direction of the key top portion 22 with a space left and right or up and down. Each linear convex portion 26a is configured to extend substantially linearly or extend slightly curved. Each linear convex portion 26 a is formed in a linear shape whose length is 20% or more of the length of the key top portion 22 in the front-rear direction. That is, in this embodiment, the key top part 22 comprises the key which concerns on this invention.

  The length of the key top portion 22 in the front-rear direction is 95 mm. On the other hand, the length of each linear convex part 26a is set to 19 mm to 95 mm, preferably 47 mm to 95 mm, and more preferably 66 mm to 95 mm. Since the concavo-convex pattern 26 is composed of a plurality of linear protrusions 26a having such a length, the concavo-convex pattern 26 is easily recognized as a wood grain, and has a visual and tactile sensation as if a key was formed of real timber. Can be obtained. Other functions and effects of the black key 20 including the key top portion 22 are the same as those of the white key 10 according to the first embodiment described above.

  In this embodiment as well, the concave-convex pattern can be constituted by groove-like linear concave portions instead of the linear convex portions 26a. Moreover, you may comprise an uneven | corrugated pattern by both the linear convex part 26a and a linear recessed part. Further, the plurality of linear convex portions 26a may be all curved or may be all straight. Further, the direction in which each linear convex portion 26a is inclined with respect to the key top portion 22 may be any direction. Further, the black key 20 may be formed of two color resin materials. Furthermore, the key for forming the uneven pattern 26 may be a white key instead of the black key 20, or both the black key 20 and the white key.

(Third embodiment)
FIG. 4 shows a concavo-convex pattern 32 formed on the upper surface portion 31 of the white key according to the third embodiment of the present invention. In this white key, the concavo-convex pattern 32 is formed on the surface of the upper surface portion 31 and the pair of side surface portions (not shown), respectively, and the surface of the front surface portion is constituted by a smooth surface. The concavo-convex pattern 32 includes a plurality of linear protrusions 33 extending in substantially the same direction. Each linear convex portion 33 is formed in a gently curved curved shape, and the end portions other than the end portions located at the front and rear edges of the side surface portions of the both end portions are mutually in the front-rear direction. Are located in different positions. Further, the uneven pattern 32 includes a perforated pattern 34 made of small convex portions and a cracked pattern 35 made of radial linear convex portions. The configuration of the other parts of the white key is the same as that of the white key 10 described above.

  As described above, in the white key according to the present embodiment, the end points of the linear protrusions 33 are different from each other in the same manner as the positions of the start point and the end point of the plurality of lines of the grain pattern that are visible on the surface of the natural wood. Are located at different positions in the front-rear direction. For this reason, the uneven | corrugated pattern 32 nearer to a grain can be formed in the upper surface part 31 and both side part of a white key. In addition, since the concavo-convex pattern 32 includes the perforated pattern 34 and the cracked pattern 35, not only the grain, but also other patterns included in normal wood can be represented, which is closer to actual wood. Since the skin and cracks are disadvantageous for wood, it is preferable that they do not exist in wood, but they are likely to occur during lumbering. By providing the key, the white key becomes closer to the actual wood. Other functions and effects of the white key are the same as those of the white key 10 according to the first embodiment described above.

  In the present embodiment, a groove-like linear concave portion may be used instead of the linear convex portion 33, or both the linear convex portion and the linear concave portion may be used. Similarly, the perforated pattern 34 may be constituted by small concave portions, may be constituted by both small convex portions and small concave portions, or the crack pattern 35 may be constituted by radial linear concave portions. Alternatively, it may be constituted by both linear convex portions and linear concave portions. Further, the white key may be formed of two color resin materials. Furthermore, the key forming the uneven pattern 32 may be a black key instead of a white key, or both a white key and a black key.

(Fourth embodiment)
FIG. 5 shows a concavo-convex pattern 42 formed on the upper surface portion 41 of the white key according to the fourth embodiment of the present invention. In this white key, an uneven pattern 42 is formed on the surface of the upper surface portion 41 and a pair of side surface portions (not shown), respectively, and the surface of the front surface portion is constituted by a smooth surface. The concavo-convex pattern 42 includes a plurality of long linear protrusions 43a and a plurality of short linear protrusions 43b extending in substantially the same direction. Each of the long line-shaped convex portion 43a and the short line-shaped convex portion 43b is formed in a curved shape that is gently curved. And the long line-shaped convex part 43a is formed more than the preset length mentioned later, and the short line-shaped convex part 43b is formed in 20% or less of the preset length.

  The preset length is 50 mm, the length of each long linear protrusion 43 a is set to 50 mm to 160 mm, and the length of the short linear protrusion 43 b is set to 0.1 mm to 32 mm, respectively. ing. Further, the length in the width direction of the upper surface portion 41 between the long line-shaped convex portions 43a indicated by the arrow c is set to be not more than half of the width of the front side portion of the upper surface portion 41. Although not shown in the drawings, the vertical spacing between the long line-shaped convex portions 43a formed on the pair of side surface portions is also set to a length that is half or less the width of the front side portion of the upper surface portion 41. Yes. And 1-756 short line-shaped convex parts 43b are arrange | positioned between each long line-shaped convex part 43a, respectively. Further, the uneven pattern 42 includes a perforated pattern 44 made of small convex portions and a cracked pattern 45 made of radial linear convex portions. The configuration of the other parts of the white key is the same as that of the white key 10 described above.

  Thus, in the white key according to the present embodiment, the long linear protrusion 43a has a length of 50 mm or more set in advance, and the short linear protrusion 43b has a length of 20% of the set length of 160 mm. The length is 32 mm or less. For this reason, in the concavo-convex pattern 42, there is no linear portion having a length between the long linear convex portion 43a and the short linear convex portion 43b, and there is a distinction between the long linear convex portion 43a and the short linear convex portion 43b. Become clear. As a result, the long linear protrusion 43a is recognized as a grain and the short linear protrusion 43b is recognized as a fiber, and a combination of the grain and the fiber can be expressed. Further, since the interval between the long linear protrusions 43a is set to 50% or less of the width of the front end portion of the white key upper surface portion 41, a plurality of short linear protrusions 43b are arranged therebetween, A pattern closer to the grain can be formed. Other functions and effects of the white key are the same as those of the white key 10 according to the first embodiment described above.

  Also in this embodiment, instead of the long linear convex portion 43a and the short linear convex portion 43b, a long linear concave portion and a short linear concave portion may be used, or the long linear convex portion, the long linear concave portion, and the short linear convex portion may be used. You may use both with a short line-shaped recessed part. Similarly, the perforated skin pattern 44 may be constituted by small concave portions, may be constituted by both small convex portions and small concave portions, or the crack pattern 45 may be constituted by radial linear concave portions. Alternatively, it may be constituted by both linear convex portions and linear concave portions. Further, the white key may be formed of two color resin materials. Further, the key forming the uneven pattern 42 may be a black key instead of a white key, or both a white key and a black key.

(Fifth embodiment)
FIG. 6 shows a concavo-convex pattern 52 formed on the upper surface portion 51 of the white key according to the fifth embodiment of the present invention. In this white key, an uneven pattern 52 is formed on the surface of the upper surface portion 51 and a pair of side surface portions (not shown), and the surface of the front surface portion is a smooth surface. The concavo-convex pattern 52 includes a plurality of linear convex portions 53a and a plurality of linear convex portions 53b extending in the front-rear direction while being curved to the left and right, and the plurality of linear convex portions 53a and the plurality of linear shapes. The protrusions 53b extend without intersecting each other. The linear convex portion 53a has a larger line width and a longer length than the linear convex portion 53b.

  The length of the linear convex portion 53a is set to 100 mm to 160 mm, respectively, and the length of the linear convex portion 53b is set to 0.1 mm to 100 mm, respectively. Moreover, the line width of the linear convex part 53a is set to 0.03 mm to 0.5 mm, respectively, and the line width of the linear convex part 53 b is set to 0.03 mm to 0.5 mm, respectively. The configuration of the other parts of the white key is the same as that of the white key 10 described above.

  As described above, in the white key according to the present embodiment, the concavo-convex pattern 52 is composed of a plurality of linear convex portions 53a and a plurality of linear convex portions 53b having different lengths and line widths. The portion 53a and the linear convex portion 53b extend without intersecting each other. In general, in wood, wood and fibers do not intersect with each other. Therefore, by preventing the plurality of linear projections 53a and the plurality of linear projections 53b from intersecting, a tree that is faithful to the actual grain. An uneven pattern 52 that can express the texture can be obtained.

  In the present embodiment, the concavo-convex pattern may be constituted by two types of linear concave portions instead of the linear convex portions 53a and 53b, or the concavo-convex pattern may be formed by both the linear convex portions and the linear concave portions. It may be configured. Moreover, you may comprise an uneven | corrugated pattern not in the linear convex part 53a and the linear convex part 53b but in the linear convex part and linear concave part provided with comparable length and line width. Furthermore, the concavo-convex pattern 52 may be provided on only one of the upper surface 51 and the side surface. Further, the white key may be formed of two color resin materials. Further, the key forming the uneven pattern 52 may be a black key instead of a white key, or both a white key and a black key.

(Sixth embodiment)
FIG. 7 shows a concavo-convex pattern 62 formed on the upper surface portion 61 of the white key 60 according to the sixth embodiment of the present invention. In the white key 60, a concavo-convex pattern 62 is formed on the surface of the upper surface portion 61, and the surfaces of both side surface portions and the front surface portion are constituted by smooth surfaces. The concavo-convex pattern 62 includes a plurality of linear recesses 62a extending in the front-rear direction while intersecting each other. Each of the linear recesses 62a is formed in a curved shape that gently curves and extends while changing the line width e and the depth f. And the angle d of the front part and rear part of the part where the linear recessed parts 62a cross is set to be within 10 degrees. The line width e of each linear recess 62a is set to 0.03 mm to 0.5 mm, respectively, and the depth f from the flat surface of the upper surface portion 51 in each linear recess 62a is set to 0.01 mm to 1 mm, respectively. Yes. The configuration of the other parts of the white key is the same as that of the white key 10 described above.

  As described above, in the white key 60 according to the present embodiment, each of the linear recesses 62a is not formed in a monotonically extending line, but is formed in a complicated shape with different line width e or depth f depending on each part. The complicated-shaped linear recesses 62a intersect each other at an angle of 10 degrees or less. For this reason, the concavo-convex pattern 62 is more varied. In addition, by setting the crossing angle d between the linear recesses 62a to a small angle of 10 degrees or less, it is possible to obtain an uneven pattern 62 that can be recognized as an actual grain. Moreover, since the uneven pattern 62 in this case can be formed at random by a simple process such as file application, there is an advantage that it can be easily formed and the production efficiency can be improved.

  In the present embodiment, the concavo-convex pattern may be constituted by a linear convex portion instead of the linear concave portion 62a, or the concavo-convex pattern may be constituted by both the linear concave portion and the linear convex portion. . Further, the uneven pattern 62 may be provided on the side surface instead of the upper surface portion 61, or may be provided on both the upper surface portion 61 and the side surface portion. Further, the white key 60 may be formed of two color resin materials. Further, the key forming the uneven pattern 62 may be a black key instead of a white key, or may be both a white key and a black key.

(Seventh embodiment)
FIG. 8 shows a concavo-convex pattern 74 formed on the upper surface portion 71 and both side surface portions 72 (only one is shown) of the white key 70 according to the seventh embodiment of the present invention. In this white key 70, the front surface 73 has a smooth surface. The concavo-convex pattern 74 is composed of a plurality of linear convex portions 74a extending in the front-rear direction. Each linear convex portion 74a is formed in a curved shape having a short length and a small line width, whereby the surfaces of the upper surface portion 71 and the side surface portion 72 are formed into rough surfaces. And as for the uneven | corrugated pattern 74 of the upper surface part 71 and the side part 72, the surface roughness along the longitudinal direction of the white key 70 each shown by the arrow g is the transversal direction of the white key 70 shown by the arrow h. Is formed so as to be smaller than the surface roughness along.

  The surface roughness in this case is not a measured value actually measured, but is compared by hand feeling. Since the plurality of linear protrusions 74a extend in the front-rear direction of the white key 70, the unevenness along the longitudinal direction of the white key 70 changes smoothly, whereas the unevenness along the short direction of the white key 70 Changes rapidly. For this reason, the surface roughness along the longitudinal direction of the white key 70 is smaller than the surface roughness along the lateral direction. That is, the surface roughness along the longitudinal direction of the white key 70 is smaller than the surface roughness along the lateral direction within a certain length range of the length of the white key 70 in the width direction. The configuration of the other parts of the white key is the same as that of the white key 10 described above.

  As described above, in the white key 70 according to the present embodiment, the surface roughness along the longitudinal direction of the white key 70 in the concavo-convex pattern 74 is made smaller than the surface roughness along the lateral direction, whereby the white key 70. The touch when touching is closer to the touch when touching actual wood. This tactile sensation makes the wooden image darker. In the present embodiment, the concavo-convex pattern may be constituted by a linear concave portion instead of the linear convex portion 74a, or the concavo-convex pattern may be constituted by both the linear convex portion and the linear concave portion. . Further, the uneven pattern 74 may be provided only on the upper surface portion 71 without being provided on the side surface portion 72. Further, the white key 70 may be formed of two color resin materials. Further, the key forming the uneven pattern 74 may be a black key instead of a white key, or both a white key and a black key.

  In the embodiment described above, the step portion 11b is formed at the rear end of the top surface of the white key 10. However, without providing the step portion 11b, the top surface of the white key 10 is continuous from the front end to the rear end. You may form in a plane. Further, the front surface portion 13 of the white key 10 extends downward from the rear edge portion of the top edge portion of the upper surface portion 11 and the front edge portion of the upper surface portion 11 projects forward from the front surface portion 13. The portion may be removed. Furthermore, each embodiment mentioned above can be implemented in combination as appropriate. Also, if there are multiple areas with different inclination angles or shapes in one surface of the upper surface part or side surface part, and the boundary part appears linearly between these areas, the boundary part also It shall be included in the line pattern.

  10, 60, 70 ... white key, 11, 23, 31, 41, 51, 61, 71 ... upper surface portion, 12, 24, 72 ... side surface portion, 14, 26, 32, 42, 52, 62, 74 ... unevenness Pattern, 14a, 26a, 33, 53a, 53b, 74a ... linear convex part, 22 ... key top part, 43a ... long linear convex part, 43b ... short linear convex part, 62a ... linear concave part.

Claims (3)

In the key of an electronic musical instrument with at least an uneven pattern formed on the upper surface ,
The concavo-convex pattern is composed of a plurality of linear parts including at least one of a linear part consisting of a concave part extending in the longitudinal direction of the key and a linear part consisting of a convex part extending in the longitudinal direction of the key , the key of an electronic musical instrument linear portions to each other constant is characterized by being adapted to exchange differences. The key of the electronic musical instrument according to claim 1, wherein the predetermined linear portion intersects at an intersection angle of 10 degrees or less. The key of the electronic musical instrument according to claim 1, wherein the plurality of linear portions include portions having different line widths and uneven heights.

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