JP2016118591A - Keyboard device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a keyboard device that can reduce fluctuations of the positions of key units relative to an electronic circuit board.SOLUTION: In a keyboard device 1 comprising a four-tone white key unit 7 being a key unit formed by integrating four white keys 7c, which are keys, and a four-tone white key stem 7a, which is a stem supporting the four white keys 7c, with resin, arranged on an electronic circuit board 3, an end part positioning member 8 and a central part positioning member 9, which are positioning members for aligning the four-tone white key unit 7 relative to the electronic circuit board 3, are disposed on the four-tone white key stem 7a, and the end part positioning member 8 and the central part positioning member 9 are deformed by the electronic circuit board 3 when the four-tone white key unit 7 is arranged on the electronic circuit board 3.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a keyboard device. Specifically, the present invention relates to a keyboard device in which a key unit is disposed on an electronic circuit board.

  Conventionally, a plurality of key units in which a black key unit in which a plurality of black keys are integrally formed of resin and a white key unit in which a plurality of white keys are integrally formed of resin are overlapped are fixed to the key frame. A keyboard device is known. In the keyboard device, a black key unit is formed with a rod-shaped protrusion as a positioning means, a white key unit is formed with a protrusion and a hole as positioning means, and an insertion hole as a positioning means is formed in the key frame. For example, as described in Patent Document 1.

  In the keyboard device described in Patent Document 1, the position of the black key unit is aligned with the white key unit by inserting the protrusion of the black key unit into the hole of the white key unit, and the white key unit protrudes into the insertion hole of the key frame. By inserting the part, the position of the white key unit with respect to the key frame is adjusted. In such a keyboard apparatus, there is an apparatus in which a fitting hole as a positioning unit is formed in an electronic circuit board to align the position of a white key unit (key unit) with respect to the electronic circuit board. However, the electronic circuit board is not composed of a material or a structure suitable for ensuring high shape accuracy. Therefore, it is necessary to make the diameter of the fitting hole formed in the electronic circuit board sufficiently larger than the diameter of the protruding portion of the white key unit in consideration of processing errors and processing conditions. For this reason, in the keyboard device, the variation of the position of the key unit with respect to the electronic circuit board increases, and the gap between the adjacent key units may become uneven.

JP 11-272261 A

  The present invention has been made in view of the above situation, and an object of the present invention is to provide a keyboard device that can reduce variations in the position of the key unit with respect to the electronic circuit board.

  That is, in the present invention, in a keyboard device in which a key unit in which a key and a base portion that supports the key are integrally formed of a resin is disposed on the electronic circuit board, positioning for aligning the position of the key unit with respect to the electronic circuit board A member is provided on the base, and the positioning member is formed to be deformed by the electronic circuit board when the key unit is disposed on the electronic circuit board.

  In the present invention, the electronic circuit board is formed with a fitting portion to which the positioning member is fitted, the deformable protrusion is formed on the positioning member, and the protrusion is formed on the fitting portion by the positioning member. When fitted, the electronic circuit board is deformed.

  In the present invention, a plurality of the protrusions are formed.

  In the present invention, a plurality of the positioning members are provided, and the position in one direction with respect to the electronic circuit board is aligned by at least one positioning member, and is orthogonal to the one direction with respect to the electronic circuit board by at least one positioning member. It is comprised so that the position of a direction may be match | combined.

  In the present invention, the protrusion is formed in a rib shape.

  In the present invention, the protrusion is formed such that the cross-sectional secondary moment on the proximal end side is larger than the cross-sectional secondary moment on the distal end side.

  According to the present invention, since the positioning member of the key unit and the electronic circuit board are reliably in contact with each other, no play occurs between the positioning member and the electronic circuit board. Thereby, the dispersion | variation in the position of the key unit with respect to an electronic circuit board can be reduced. In addition, friction occurs between the electronic circuit board and the positioning member. Thereby, the key unit can be temporarily fixed to the electronic circuit board.

  According to the present invention, the positioning member of the key unit is easily deformed according to the shape of the fitting portion of the electronic circuit board, and an appropriate frictional force is generated. Thereby, the dispersion | variation in the position of the key unit with respect to an electronic circuit board can be reduced. In addition, the key unit can be temporarily fixed to the electronic circuit board.

  According to the present invention, the positioning member is held substantially at the center of the fitting portion or arranged in contact with the edge of the fitting portion. Thereby, the dispersion | variation in the position of the key unit with respect to an electronic circuit board can be reduced.

  According to the present invention, the plurality of positioning members are brought into contact with the fitting portion of the electronic circuit board in a state where movement in different directions is restricted. Thereby, the dispersion | variation in the position of the key unit with respect to an electronic circuit board can be reduced.

  According to the present invention, the friction generated between the electronic circuit board and the positioning member increases as the contact range between the protrusion and the electronic circuit board increases. Thereby, the dispersion | variation in the position of the key unit with respect to an electronic circuit board can be reduced. In addition, the key unit can be temporarily fixed to the electronic circuit board.

  According to the present invention, when the protrusion is fitted into the fitting portion, deformation such as bending of the protrusion itself is suppressed, and an appropriate frictional force is generated. Thereby, the dispersion | variation in the position of the key unit with respect to an electronic circuit board can be reduced. In addition, the key unit can be temporarily fixed to the electronic circuit board.

(A) The perspective view which shows the whole structure of the keyboard apparatus based on this invention (b) The side view which similarly shows the operation | movement aspect of a keyboard apparatus. The disassembled perspective view which shows the structure in 1st embodiment of the keyboard apparatus which concerns on this invention. (A) Partial sectional side view on the fixed side in the first embodiment of the keyboard device according to the present invention (b) The same plan view. (A) The expansion perspective view which shows the edge part positioning member and the horizontally long fitting hole in 1st embodiment of the keyboard apparatus which concerns on this invention (b) The expansion perspective view which similarly shows a center part positioning member and a vertically long fitting hole. (A-1) Enlarged sectional view showing the end positioning member and the horizontally long fitting hole in the first embodiment of the keyboard device according to the present invention (a-2) Similarly, the sectional view taken along the arrow A in FIG. (B-1) Similarly expanded sectional view which shows the state by which the edge part positioning member is inserted in the horizontally long fitting hole (b-2) Similarly B arrow sectional drawing in a figure (b-1). The partial enlarged plan view which shows the movable direction of the edge part positioning member in the horizontally long fitting hole in 1st embodiment of the keyboard apparatus which concerns on this invention, and the movable direction of the center part positioning member in a vertically long fitting hole. (A-1) Enlarged sectional view (a-2) showing a positioning member and a fitting hole in the second embodiment of the keyboard device according to the present invention (a-2) Similarly, a sectional view taken along the arrow C in FIG. 1) Similarly expanded sectional view (b-2) which shows the state by which the positioning member is inserted in the fitting hole. Similarly D sectional view taken on the line in FIG. (A) Partial enlarged plan view showing a state in which the positioning member in the third embodiment of the keyboard device according to the present invention is inserted into the fitting hole (b) Positioning member in the fourth embodiment of the keyboard device according to the present invention (C) The elements on larger scale which show the state by which the positioning member in 5th embodiment of the keyboard apparatus which concerns on this invention is inserted in the fitting hole is shown. (A) Partial enlarged plan view showing a state where a rhombus-shaped positioning member is inserted into the fitting hole as another embodiment of the keyboard device according to the present invention (b) Positioning member also formed in a star shape (C) The partial enlarged plan view which shows the state by which the positioning member in which many small protrusions were similarly formed in the surface was inserted in the fitting hole.

<First embodiment>
Below, the keyboard apparatus 1 which concerns on 1st embodiment of this invention is demonstrated using FIGS. 1-3. The keyboard device 1 is a keyboard device 1 of an electronic keyboard instrument in the present embodiment.
As shown in FIG. 1A, the keyboard device 1 includes a frame 2, an electronic circuit board 3, a key switch 4, a key unit 10 (a black key unit 5 including five black keys 5c, and three white keys 6c. A four-tone white key unit 7) comprising a three-tone white key unit 6 and four white keys 7c is provided. In the keyboard device 1, a plurality of key units 10 are arranged on the electronic circuit board 3. The key unit 10 is configured by superposing the four-tone white key unit 7, the three-tone white key unit 6, and the black key unit 5 in this order from the electronic circuit board 3 side. As shown in FIG. 1 (b), when the black key 5c or white key 6c or 7c is pressed by the operator, the keyboard device 1 has a key switch corresponding to the operated black key 5c or white key 6c or 7c. 4 is compressed and deformed, and a signal for the operation of the black key 5c or the white keys 6c and 7c is transmitted.

  As shown in FIG. 2, the electronic circuit board 3 includes a circuit (not shown) that transmits a signal for detecting the operation of the black key 5c or the white keys 6c and 7c. The electronic circuit board 3 is fixed to the frame 2 via a spacer 2a. The circuit of the electronic circuit board 3 is provided with a fixed contact (not shown). The circuit of the electronic circuit board 3 is switched to a state in which a signal is transmitted (entered state) when a movable side contact (not shown) of the key switch 4 contacts the fixed side contact. The electronic circuit board 3 is formed with a horizontally long fitting hole 3a and a vertically long fitting hole 3b which are fitting portions. The horizontally long fitting hole 3a is formed in a long hole along the arrangement direction of the black key 5c and the white keys 6c and 7c. The vertically long fitting hole 3b is formed as a long hole along the direction perpendicular to the horizontally long fitting hole 3a. Two horizontally long fitting holes 3a are arranged at a predetermined interval with respect to one white key unit for four sounds. One vertically long fitting hole 3b is arranged between the horizontally long fitting holes 3a with respect to one white key unit for four sounds. In the present embodiment, the positions and the number of the horizontally long fitting holes 3a and the vertically long fitting holes 3b are not limited to this embodiment. Moreover, although the vertically long fitting hole 3b is formed along the direction orthogonal to the horizontally long fitting hole 3a, it is not limited to this, and if it is formed along the direction different from the horizontally long fitting hole 3a. Good. Furthermore, although the vertically long fitting hole 3b is formed as a long hole, it is not limited to this and may be formed in a simple round hole.

  The key switch 4 enables transmission of a signal for detecting the operation of the black key 5c or the white keys 6c and 7c. The key switch 4 is formed of an elastic member such as silicon rubber in a dome shape, and is provided with a movable contact (not shown). The key switch 4 is provided for each of the black key 5c and the white keys 6c and 7c, and is fixed to the electronic circuit board 3 so as to be pressed by the corresponding black key 5c or the white keys 6c and 7c. The key switch 4 is configured such that the movable contact contacts the fixed contact of the electronic circuit board 3 by pressing the corresponding black key 5c or white key 6c or 7c.

  The black key unit 5 includes a black key base portion 5a, a hinge portion 5b, and five black keys 5c (black keys 5c corresponding to sounds of C #, D #, F #, G #, and A #). Are integrally formed. The black key base 5a is formed in a substantially rectangular plate shape. On the plane of the black key base 5a on the three-tone white key unit 6 side, a groove 5f is formed along the longitudinal direction of the black key base 5a, and a bar-like protrusion 5g is formed. A temporary fixing member 5j is formed at one long side end of the black key base 5a. The temporary fixing member 5j is engaged with the edge of the electronic circuit board 3 when the black key unit 5 is arranged on the electronic circuit board 3. Five thin-plate hinges 5b are formed at the other long side end of the black key base 5a. The hinge part 5b makes the black key 5c pressable by elastic deformation. Each hinge portion 5b is formed with a black key 5c. That is, in the black key unit 5, five black keys 5c are supported on the black key base portion 5a via the hinge portion 5b. Each of the five black keys 5c is formed with a key stopper 5h for restricting the rotation range of the black key 5c. The key stopper 5h comes into contact with the upper limit stopper 3c provided on the electronic circuit board 3 when the black key 5c is not pressed, and contacts the lower limit stopper 2b of the frame 2 when the black key 5c is pressed. It is comprised so that it may contact.

  The three-tone white key unit 6 includes a three-tone white key base portion 6a, a hinge portion 6b, and three white keys 6c (white keys corresponding to the sounds of D, F, and A), which are integrally formed of resin. It has been done. The three-tone white key unit 6 and the four-tone white key unit 7 to be described later have substantially the same configuration as the black key unit 5, and thus the detailed description of the same points as those in the embodiment already described is omitted. The description will focus on the differences. A rectangular protrusion 6d having a shape that can be fitted into the groove 5f of the black key unit 5 is formed on the plane of the three-tone white key base 6a on the black key unit 5 side, and a bar-like protrusion of the black key unit 5 is formed. A fitting hole 6e having a shape capable of fitting 5g is formed. On the plane of the three-tone white key base 6a on the four-tone white key unit 7 side, a groove 6f is formed along the longitudinal direction of the three-tone white key base 6a, and a rod-like protruding portion 6g is formed. Yes. The three-tone white key unit 6 is not formed with a temporary fixing member.

  The four-tone white key unit 7 includes a four-tone white key base portion 7a, a hinge portion 7b, and four white keys 7c (white keys corresponding to the sounds of C, E, G, and B) made of resin. It is formed. On the plane of the four-tone white key base 7a on the three-tone white key unit 6 side, a rectangular protrusion 7d having a shape that can be fitted in the groove 6f of the three-tone white key unit 6 is formed. A fitting hole 7e having a shape into which the bar-like protrusion 6g of the white key unit 6 can be fitted is formed. A substantially rod-shaped end portion positioning member 8 and a central portion positioning member 9 which are positioning members are formed on a plane of the four-tone white key base portion 7a on the electronic circuit board 3 side. One end positioning member 8 is formed at each of both ends in the longitudinal direction of the four-tone white key base 7a. One central portion positioning member 9 is formed at a substantially central portion in the longitudinal direction of the four-tone white key base portion 7a. In the present embodiment, the four-tone white key unit 7 has a configuration in which two end positioning members 8 and one central positioning member 9 are formed. However, the present invention is not limited to this. .

  The black key unit 5 is superimposed on the three-tone white key unit 6. At this time, the rectangular protrusion 6d of the three-tone white key unit 6 is fitted into the groove 5f of the black key unit 5. Further, the bar-shaped protruding portion 5 g of the black key unit 5 is fitted in the fitting hole 6 e of the three-tone white key unit 6. Similarly, the three-tone white key unit 6 is superimposed on the four-tone white key unit 7. In this way, the black key unit 5, the three-tone white key unit 6, and the four-tone white key unit 7 are overlapped in a state where the positions thereof are aligned with each other to form a one-octave key unit 10. .

  As shown in FIGS. 3 (a) and 3 (b), the plurality of key units 10 are connected to the black key 5c or the white key 6c, via the four-tone white key unit 7 constituting a part thereof. 7c is arranged on the electronic circuit board 3 so as to be adjacent to each other in the arrangement direction. At this time, the end positioning members 8 provided in the four-tone white key unit 7 are respectively fitted in the horizontally long fitting holes 3 a of the electronic circuit board 3. Further, the central positioning member 9 provided in the four-tone white key unit 7 is fitted in the vertically long fitting hole 3 b of the electronic circuit board 3. The key unit 10 is fixed to the electronic circuit board 3 by screws or the like (not shown).

Next, using FIG. 4 to FIG. 6, in the keyboard device 1, the attachment mode of the four-tone white key unit 7 to the electronic circuit board 3 by the end positioning member 8 and the center positioning member 9 is specifically described. explain.
As shown in FIG. 4A, a rib-like protrusion 8b faces the surface of the rod-like portion 8a of the end positioning member 8 provided in the four-tone white key unit 7 along the axial direction thereof. In this way, two are formed. The two protrusions 8b are formed such that the end portions of the end positioning member 8 are tapered. In addition, the two protrusions 8b are formed in a substantially trapezoidal shape when the end positioning member 8 is viewed in the axial cross-section (see FIG. 5A-2). That is, the two protrusions 8b are formed so that the sectional secondary moment on the base end side is larger than the sectional secondary moment on the distal end side. The two protrusions 8b are formed at positions facing the edges in the width direction of the horizontally long fitting holes 3a of the electronic circuit board 3, respectively.

  As shown in FIGS. 5 (a-1) and 5 (a-2), the diameter D1 of the rod-shaped portion 8a of the end positioning member 8 is within the range of variation in the width D0 of the horizontally long fitting hole 3a. It is formed to be equal to or smaller than the width D0 of the smallest horizontally long fitting hole 3a. Further, the distance D2 between the tips of the two protrusions 8b having the maximum diameter of the end positioning member 8 is larger than the width D0 of the largest horizontally long fitting hole 3a in the range of variation of the width D0 of the horizontally long fitting hole 3a. It is formed to be large. That is, when the end positioning member 8 is inserted into the horizontally long fitting hole 3a within the range of variation in the width D0 of the horizontally long fitting hole 3a, the two protrusions 8b always come into contact with the edge of the horizontally long fitting hole 3a. It is formed as follows.

The bar-shaped central portion positioning member 9 provided in the four-tone white key unit 7 has substantially the same configuration as that of the end portion positioning member 8, so that the same points as those of the above-described embodiment will be specifically described. The description will be centered on the differences. As shown in FIG. 4B, the two protrusions 9b of the central positioning member 9 are formed at positions facing the edges in the width direction of the vertically long fitting holes 3b. When the central positioning member 9 is inserted into the vertically long fitting hole 3b within the range of variation in the width D0 of the vertically long fitting hole 3b, the two protrusions 9b always come into contact with the edges of the vertically long fitting hole 3b. Is formed.

  As shown in FIGS. 5 (b-1) and 5 (b-2), when the end positioning member is inserted into the horizontally long fitting hole 3a of the electronic circuit board 3, the two protrusions 8b Regardless of variations in the processing of the joint hole 3a, they contact with the edges of the horizontally long fitting holes 3a facing each other. The two protrusions 8b are compressed and deformed by the edge of the horizontally long fitting hole 3a until the distance between the tips thereof becomes the same as the width D0 of the horizontally long fitting hole 3a. As a result, the end portion positioning member 8 is fitted to the approximate center in the width direction of the horizontally long fitting hole 3a by the balance of the reaction force from the horizontally long fitting hole 3a against the compression of the two protrusions 8b. Similarly, the center positioning member 9 is fitted to the approximate center in the width direction of the vertically long fitting hole 3b by the balance of the reaction force from the vertically long fitting hole 3b against the compression of the two protrusions 9b (FIG. 4 ( b)). As shown in FIG. 6, the end positioning member 8 is allowed to move in the longitudinal direction of the horizontally long fitting hole 3a, and the center portion positioning member 9 is vertically long fitted in a direction orthogonal to the horizontally long fitting hole 3a. Movement in the longitudinal direction of the joint hole 3b is allowed (see black arrow). That is, the end portion positioning member 8 and the center portion positioning member 9 are configured not to restrict movement in the positioning direction of each other.

  The four-tone white key unit 7 configured as described above determines the position in the width direction of the horizontally long fitting hole 3a with respect to the electronic circuit board 3 by contact between the protrusion 8b of the end positioning member 8 and the horizontally long fitting hole 3a. The position of the longitudinal fitting hole 3b in the width direction with respect to the electronic circuit board 3 is determined by the contact between the projection 9b of the central positioning member 9 and the longitudinal fitting hole 3b. That is, the end portion positioning member 8 and the center portion positioning member 9 are configured such that no play occurs between the horizontally long fitting hole 3a and the vertically long fitting hole 3b. Further, since the two protrusions 8b and 9b are formed so that the cross-sectional secondary moment on the base end side is larger than the cross-sectional secondary moment on the front end side, the two protrusions 8b and 9b are not bent from the base end side when compressed. Hard to occur. Thereby, in the keyboard apparatus 1, the dispersion | variation in the position of the white key unit 7 for four sounds with respect to the electronic circuit board 3 can be reduced. Therefore, the keyboard device 1 can make the gaps between the adjacent key units 10 uniform. Further, the end positioning member 8 and the center positioning member 9 are formed with two protrusions 8b and 9b in a rib shape, so that the contact area between the horizontally long fitting hole 3a and the vertically long fitting hole 3b is increased. Proportional friction force is generated. As a result, the four-tone white key unit 7 is temporarily fixed to the electronic circuit board 3 by a frictional force. Therefore, in the keyboard device 1, the temporary fixing member 5 j may not be formed on the black key unit 5.

<Second embodiment>
Next, a keyboard device 11 which is a second embodiment of the keyboard device according to the present invention will be described with reference to FIG. The keyboard device 11 according to the second embodiment, the keyboard device 13 according to the third embodiment, the keyboard device 15 according to the fourth embodiment, the keyboard device 17 according to the fifth embodiment, and other embodiments. The keyboard device is assumed to be applied in place of the keyboard device 1 in the keyboard device 1 shown in FIGS. 1 to 6, and the same name is used by using the names, figure numbers, and symbols used in the description. In the following embodiments, specific description of the same points as those of the above-described embodiments will be omitted, and differences will be mainly described.

  As shown in FIGS. 7A-1 and 7A-2, the electronic circuit board 3 is formed with a substantially circular fitting hole 3d as a fitting portion. Two fitting holes 3d are arranged at predetermined intervals with respect to one white key unit for four sounds along the arrangement direction of black keys 5c or white keys 6c and 7c (see FIG. 3). . Further, two substantially rod-like positioning members 12 are formed on the plane of the four-tone white key base 7a on the electronic circuit board 3 side at a position facing the fitting hole 3d.

  One rib-shaped protrusion 12b is formed on the surface of the rod-shaped portion 12a of the positioning member 12 along the axial direction thereof. The distance D2 between the portion facing the protrusion 12b and the tip of the protrusion 12b in the rod-shaped portion 12a having the maximum diameter of the positioning member 12 is the most within the range of the diameter variation of the fitting hole 3d processed in the electronic circuit board 3. It is formed to be larger than the diameter D0 of the large fitting hole 3d. That is, the positioning member 12 is formed so that the rod-shaped portion 12a and the protrusion 12b always come into contact with the fitting hole 3d when inserted into the fitting hole 3d within the range of variation in the diameter D0 of the fitting hole 3d. ing.

  As shown in FIGS. 7B-1 and 7B-2, when the positioning member 12 is inserted into the fitting hole 3d of the electronic circuit board 3, the rod-shaped portion 12a and the protrusion 12b of the positioning member Are in contact with the edges of the fitting holes 3d facing each other regardless of variations in the processing of the fitting holes 3d. The protrusion 12b is compressed and deformed by the edge of the fitting hole 3d until the maximum diameter D2 of the positioning member 12 becomes equal to the diameter D0 of the fitting hole 3d. As a result, the positioning member 12 is fitted into the fitting hole by balancing the reaction force from the fitting hole 3d with respect to the contact of the rod-shaped portion 12a with the fitting hole 3d and the reaction force from the fitting hole 3d with respect to the compression of the protrusion 12b. The fitting is performed with reference to the edge on one side of 3d (the side on which the rod-like portion 12a is in contact).

  The position of the four-tone white key unit 7 configured as described above is determined in a state where the rod-shaped portion 12a and the protrusion 12b of the positioning member 12 are in contact with the edge of the fitting hole 3d of the electronic circuit board 3. It is configured. That is, the positioning member 12 is configured such that no play occurs between the positioning member 12 and the fitting hole 3d. Thereby, in the keyboard apparatus 11, the dispersion | variation in the position of the white key unit 7 for four sounds with respect to the electronic circuit board 3 can be reduced. In the keyboard device 11, the key unit 10 can be temporarily fixed to the electronic circuit board 3.

<Third embodiment>
Next, a keyboard device 13 that is a third embodiment of the keyboard device according to the present invention will be described with reference to FIG. The electronic circuit board 3 is formed with a substantially circular fitting hole 3d as a fitting portion. Two fitting holes 3d are arranged at predetermined intervals with respect to one white key unit for four sounds along the arrangement direction of black keys 5c or white keys 6c and 7c (see FIG. 3). . Further, two substantially rod-like positioning members 14 are formed on the plane of the four-tone white key base portion 7a on the electronic circuit board 3 side at a position facing the fitting hole 3d.

  Two rib-like protrusions 14b are formed on the surface of the rod-like portion 14a of the positioning member 14 along the axial direction thereof. The two protrusions 14b are all arranged on an arc whose center angle θ is less than 180 degrees with the axis of the positioning member 14 as the center in a sectional view of the positioning member 14 in the axial direction. In the present embodiment, the two protrusions 14b are formed on the surface of the positioning member 14. However, the present invention is not limited to this, and any structure may be used as long as a plurality of protrusions 14b are formed.

  When the positioning member 14 is inserted into the fitting hole 3d of the electronic circuit board 3, the rod-like portion 14a and the two protrusions 14b are formed in the fitting hole 3d facing each other regardless of variations in the processing of the fitting hole 3d. Touch the edge. The two protrusions 14b are compressed and deformed by the edge of the fitting hole 3d until the maximum diameter of the positioning member 14 becomes the same as the diameter of the fitting hole 3d. As a result, the positioning member 14 is fitted into the fitting hole 3d by balancing the reaction force from the fitting hole 3d with respect to the contact of the rod-like portion 14a with the fitting hole 3d and the reaction force from the fitting hole 3d with respect to the compression of the protrusion 14b. Are fitted with reference to one side (the side with which the rod-like portion 14a is in contact).

  The position of the four-tone white key unit 7 configured as described above is determined in a state where the rod-like portion 14a of the positioning member 14 and the two protrusions 14b are in contact with the fitting hole 3d of the electronic circuit board 3. It is configured. That is, the positioning member 14 is configured such that the position in the fitting hole 3d is stably maintained by contacting the fitting hole 3d at three positions. Thereby, in the keyboard apparatus 13, the dispersion | variation in the position of the white key unit 7 for four sounds with respect to the electronic circuit board 3 can be reduced. In the keyboard device 13, the key unit 10 can be temporarily fixed to the electronic circuit board 3.

<Fourth embodiment>
Next, a keyboard device 15 that is a fourth embodiment of the keyboard device according to the present invention will be described with reference to FIG. The electronic circuit board 3 is formed with a substantially circular fitting hole 3d as a fitting portion. Two fitting holes 3d are arranged at predetermined intervals with respect to one white key unit for four sounds along the arrangement direction of black keys 5c or white keys 6c and 7c (see FIG. 3). . Further, two substantially rod-like positioning members 16 are formed on the plane of the four-tone white key base 7a on the electronic circuit board 3 side at a position facing the fitting hole 3d.

  Four rib-shaped protrusions 16b are formed on the surface of the rod-shaped portion 16a of the positioning member 16 along the axial direction thereof. The four protrusions 16b are arranged at equal intervals in the axial direction sectional view of the positioning member 16. In the present embodiment, the four protrusions 16b are formed on the surface of the rod-shaped portion 16a. However, the present invention is not limited to this, and any structure may be used as long as the plurality of protrusions 16b are formed at equal intervals. .

  When the positioning member 16 is inserted into the fitting hole 3d of the electronic circuit board 3, the four protrusions 16b come into contact with the edges of the fitting holes 3d facing each other regardless of variations in processing of the fitting hole 3d. The four protrusions 16b are compressed and deformed by the edge of the fitting hole 3d until the maximum diameter of the positioning member 16 becomes the same as the diameter of the fitting hole 3d. As a result, the positioning member 16 is fitted to the approximate center of the fitting hole 3d by the balance of the reaction force from the fitting hole 3d against the compression of the protrusion 16b.

  The four-tone white key unit 7 configured in this way is configured such that the position is determined in a state where the four protrusions 16b are in contact with the fitting holes 3d. That is, the positioning member 16 is configured such that the position in the fitting hole 3d is stably maintained. Thereby, in the keyboard apparatus 15, the dispersion | variation in the position of the white key unit 7 for four sounds with respect to the electronic circuit board 3 can be reduced. In the keyboard device 15, the key unit 10 can be temporarily fixed to the electronic circuit board 3.

<Fifth embodiment>
Next, with reference to FIG. 8C, a keyboard device 17 which is a fifth embodiment of the keyboard device according to the present invention will be described. The electronic circuit board 3 is formed with a substantially rectangular fitting hole 3e which is a fitting portion. Two fitting holes 3e are arranged at a predetermined interval with respect to one white key unit for four sounds along the arrangement direction of black keys 5c or white keys 6c and 7c (see FIG. 3). . In addition, a substantially rod-shaped positioning member 18 is formed at a position facing the fitting hole 3e on the flat surface of the four-tone white key base 7a on the electronic circuit board 3 side. In the present embodiment, the two fitting holes 3e are formed in a substantially square shape, but are not limited to the same shape, and the horizontally long fitting hole 3a and the vertically long fitting hole 3b in the first embodiment. You may comprise in a different shape like. In the present embodiment, two fitting holes are formed in one four-tone white key unit 7. However, the present invention is not limited to this.

  The positioning member 18 is formed to have a diameter larger than the width of the largest fitting hole 3e in the range of variations in processing of the fitting hole 3e of the electronic circuit board 3. That is, the positioning member 18 is formed so as to always come into contact with the fitting hole 3e within the range of variation in the width of the fitting hole 3e. When the positioning member 18 is inserted into the fitting hole 3e of the electronic circuit board 3, the surface of the positioning member 18 comes into contact with the edge of the opposing fitting hole 3e regardless of variations in processing of the fitting hole 3e. The positioning member 18 is compressed and deformed by the edge of the fitting hole 3e until the maximum diameter becomes the same as the width of the fitting hole 3e. As a result, the positioning member 18 is fitted to the approximate center of the fitting hole 3e by balance of the reaction force from the fitting hole 3e.

  The four-tone white key unit 7 configured in this way is configured such that the position is determined in a state where the surface of the positioning member 18 is in contact with the fitting hole 3e. That is, the positioning member 18 is configured such that the position in the fitting hole 3e is stably maintained. Thereby, in the keyboard apparatus 17, the dispersion | variation in the position of the white key unit 7 for four sounds with respect to the electronic circuit board 3 can be reduced. In the keyboard device 17, the key unit 10 can be temporarily fixed to the electronic circuit board 3.

<Other embodiments>
As another embodiment of the keyboard device 1, 11, 13, 15 according to the first embodiment to the fourth embodiment, the four-tone white key unit 7 may be provided with a rod-like positioning member having a polygonal cross section in the axial direction. Good.
For example, as shown in FIGS. 9A and 9B, the positioning member may be a positioning member 19 having a substantially square shape in cross section in the axial direction or a positioning member 20 having a star shape. That is, the positioning members 19 and 20 are formed such that the apexes 19a and 20a in the cross-sectional shape of the shaft correspond to the protrusions 8b, 9b, 12b, 14b, and 16b in the first to fourth embodiments. . When the positioning members 19 and 20 are inserted into the fitting holes 3d of the electronic circuit board 3, the apexes 19a and 20a are located at the edges of the fitting holes 3d that face each other regardless of variations in the processing of the fitting holes 3d. Contact. Each vertex 19a, 20a is compressed and deformed by the edge of the fitting hole 3d until the width between the paired vertices which is the maximum width of the positioning members 19, 20 is equal to the diameter of the fitting hole 3d. As a result, the positioning members 19 and 20 are fitted in substantially the center of the fitting hole 3d by the balance of the reaction force from the fitting hole 3d against the compression of the apexes 19a and 20a. Further, as shown in FIG. 9C, the positioning member may be a positioning member 21 having a large number of small protrusions 21a and wrinkles formed on the surface. The positioning member 21 is fitted into the approximate center of the fitting hole 3d by compressing and deforming 1a and the texture.

In the keyboard apparatus 1, 11, 13, 15, 17 according to the present invention, the key unit 10 is configured by stacking the black key unit 5, the three-tone white key unit 6, and the four-tone white key unit 7 in this order from the top. However, it is not limited to this. The black key unit 5, the three-tone white key unit 6, and the four-tone white key unit 7 are fixed to the electronic circuit board 3 in a state of being fitted to each other. The structure fixed to the electronic circuit board 3 in the state fastened to fastening members, such as a screw, may be sufficient. The number of the fitting holes 3a, 3b, 3d, 3e formed in the electronic circuit board 3 and the positioning members 8, 9, 12, 19, 20, 21 formed in the white key unit for four sounds It is not limited to the number in the embodiment.
The shape of the protrusions 8b, 9b, 12b, 14b, 16b, 19a, 20a, and 21a is not limited to the shape of each embodiment, and the sectional secondary moment on the base end side rather than the sectional secondary moment on the distal end side. What is necessary is just to be formed in the substantially triangular shape and substantially semicircle shape which become large. Further, the protrusions 8b, 9b, 12b, 14b, 16b, 19a, and 20a are formed in a rib shape, but the present invention is not limited to this, and may be formed in a grain shape.

  Although the keyboard apparatus 1, 11, 13, 15, 17 according to the present invention has been described as an embodiment applied to an electronic keyboard instrument, the present invention is not limited to this, and an operator such as a key unit 10 and an electronic circuit Any device including the substrate 3 may be used. In addition, the above-described embodiments are merely representative examples of the present invention, and various modifications can be made without departing from the scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 Keyboard apparatus, 3 Electronic circuit board, 7 White key unit for 4 sounds, 7a White key base for 4 sounds, 7c White key, 8 End positioning member, 9 Center positioning member

Claims (6)

In a keyboard apparatus in which a key unit in which a key and a base portion supporting the key are integrally formed of resin is disposed on an electronic circuit board,
A positioning member for aligning the position of the key unit with respect to the electronic circuit board is provided on the base,
The keyboard device, wherein the positioning member is formed to be deformed by the electronic circuit board when the key unit is disposed on the electronic circuit board. A fitting portion into which the positioning member is fitted to the electronic circuit board is formed,
A deformable protrusion is formed on the positioning member,
The keyboard device according to claim 1, wherein the protrusion is deformed by the electronic circuit board when the positioning member is fitted into the fitting portion.   The keyboard device according to claim 2, wherein a plurality of the protrusions are formed. A plurality of the positioning members are provided,
The at least one positioning member is configured to align a position in one direction with respect to the electronic circuit board, and the at least one positioning member is configured to align a position in a direction orthogonal to the one direction relative to the electronic circuit board. Alternatively, the keyboard device according to claim 3.   The keyboard apparatus according to claim 2, wherein the protrusion is formed in a rib shape.   6. The keyboard device according to claim 2, wherein the protrusion is formed so that a cross-sectional secondary moment on the base end side is larger than a cross-sectional secondary moment on the distal end side.

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