JP2016151698A - Keyboard device and electronic keyboard musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a key compact in a longitudinal direction, while maintaining an appropriate parallel movement of the key.SOLUTION: A white key WK1 includes: an actuator 31; and two front/rear guided parts 32f, 32r. The guided parts 32f, 32r and the actuator 31 correspond to the positions of guide parts 22f, 22r of a key frame 20 and a switch hole 21. The white key WK1 depressed to a pressed key end position is restored to a non-pressed key position by reaction force from an elastic swollen part 46. A parallel maintenance member 34 has an extension part 35 extended in a longitudinal direction of the key, and movable parts 38f, 38r are connected to the extension part 35 by connection parts 36f, 36r. A part equivalent to at least the connection parts 36f, 36r of the parallel maintenance member 34 exists between the guided parts 32f, 32r in the longitudinal direction of the key.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a keyboard device having a plurality of keys that move substantially in parallel with the pressing direction from a non-operating position to a key pressing end position when pressed. The present invention also relates to an electronic keyboard instrument to which a key unit can be connected.

  Conventionally, as shown in the following Patent Documents 1, 2, and 3, a so-called parallel keyboard in which a key moves in parallel in a pressing direction is known. In this type of keyboard device, for example, a key is disposed on the frame via a link mechanism or an arm mechanism. Then, a mechanism that exerts an urging force is provided on the link mechanism or the arm mechanism, and the depressed key is returned to the non-depressed position.

  On the other hand, although not a keyboard device, a switch device is known in which movement is guided by a cylindrical guide portion so that the operation element is appropriately displaced in the pressing direction (Patent Document 4 below). ). When the actuator of the push button type switch operator depresses the contact rubber, the operator is returned to the non-operation position by the reaction force exerted by the elastic bulging portion of the contact rubber.

Japanese Patent Laid-Open No. 4-66995 Japanese Patent No. 2668427 Japanese Patent No. 3332174 Japanese Utility Model Publication No. 4-99322 JP 2003-302975 A

  Since the key is long in the front-rear direction, generally in a parallel keyboard, when the key tilts in the front-rear direction during parallel movement, the movement becomes unsmooth. Therefore, in order to stably move the entire key in parallel, it is preferable to provide two or more guide portions for guiding the operation and two or more urging portions for applying a restoring force to the key in the longitudinal direction of the key. However, if a large number of these guide portions and urging portions are provided, the arrangement area is eroded in the longitudinal direction of the key, and the keyboard device is particularly downsized in the longitudinal direction of the key. Further, in the structure in which the arm mechanism protrudes outside in the width direction of the key as in Patent Document 3, the degree of freedom of arrangement of a switch or the like disposed below the key is reduced, which may be an obstacle to downsizing. .

  By the way, conventionally, when inputting performance information or the like to a personal computer, a keyboard having a small number of keys is used. In order to make it easier to input a performance in a wider range in real time, an electronic keyboard instrument has been proposed in which the key range can be expanded by connecting and adding key units in series (Patent Document 5). Regarding the transmission of the key operation detection signal in the additional key unit, communication by a communication interface is disclosed.

  However, Patent Document 5 does not describe details of the wiring structure and connection mode for signal transfer. In particular, no viewpoint is disclosed regarding reducing the thickness (size in the vertical direction) of the keyboard instrument in the structure in which the key units can be connected.

  The present invention has been made to solve the above-described problems of the prior art, and a first object thereof is to provide a keyboard device that can be made compact in the longitudinal direction while maintaining appropriate parallel movement of the key. There is to do.

  A second object of the present invention is to provide an electronic keyboard instrument that can be configured to increase the key range while making the instrument compact in the vertical direction.

  In order to achieve the first object, a keyboard device according to claim 1 of the present invention has a plurality of keys that move substantially in parallel to the pressing direction from a non-operation position to a key pressing end position when pressed. A device (20) in which each key is disposed, an actuator (31) projecting downward from the key, and provided on the key on both sides of the actuator in the longitudinal direction of the key. The first guided portion (32f) and the second guided portion (32r) are disposed on the frame in correspondence with the actuator, and are driven by the actuator to move the pressed key to the non-operation position. Urging means (46) for urging in the direction of, and being arranged on the frame corresponding to the first guided portion and the second guided portion, the first guided portion and the first guided portion 2 A first guide portion (22f) and a second guide portion (22r) that respectively engage the guide portions to guide the operation of the key, and a parallel maintaining means for maintaining a parallel state when the keys are operated. (34), and the parallel maintaining means extends in the longitudinal direction of the key and is provided so as to be rotatable with respect to the key. It consists of a movable part (38f, 38r) that can be displaced in the width direction of the key, and a connection part (36f, 36r) that connects the extending part and the movable part. The key is present between the first guided portion and the second guided portion in the longitudinal direction of the key.

  Preferably, the entire parallel maintaining means is present between the first guided portion and the second guided portion in the longitudinal direction of the key in a plan view (Claim 2). Preferably, the connection portion includes a first connection portion (36f) and a second connection portion (36r), and the movable portion includes a first movable portion (38f) and a second movable portion (38r). The first movable part is connected to the extension part by the first connection part, and the second movable part is connected to the extension part by the second connection part. In a plan view, the first connecting portion exists between the first guided portion (32f) and the biasing means in the longitudinal direction of the key, and the second connecting portion is the key. It exists between the said 2nd to-be-guided part (32r) and the said urging | biasing means in a longitudinal direction (Claim 3).

  Preferably, the movable range of the movable part of the parallel maintaining means corresponding to the movement range from the non-operation position of the key to the key pressing end position is within the range of the corresponding key width (B). 4). Preferably, the length of the first guide portion and the second guide portion in the width direction of the key is longer than the length of the key in the longitudinal direction (Claim 5).

  In order to achieve the first object, an electronic keyboard instrument according to claim 6 of the present invention includes a keyboard part (KB) having a plurality of keys, and one end side (100a) of the keyboard part in the key arrangement direction. A musical tone generator (12) that generates a musical tone signal based on a detection signal, a laminated sheet (S3) having a laminated structure that has a function of detecting each operation of the key and outputting a detection signal, A connector part (15) for connecting a key unit (200) having a plurality of keys, arranged on the other end side (100b) of the keyboard part in the key arrangement direction, and a key connected to the connector part A transfer sheet (45) having a signal line (54) for transferring a detection signal output from the unit to the musical sound generating unit, and the transfer sheet is laminated on the laminated sheet Installed in a state. The features.

  Preferably, the laminated sheet has an upper sheet (42) and a lower sheet (44) each having a contact (42a, 44a) corresponding to each key, and a hole (43a) corresponding to the contact. A spacer sheet (43) that is disposed between the sheet and the lower sheet and that separates the contact points of the upper sheet and the lower sheet when the key is not operated, and the transfer sheet is the lower sheet A substrate (11), which is disposed under the sheet and on which the tone generator is mounted, is sandwiched between the end of the upper sheet and the end of the transfer sheet in the thickness direction (Claim 7).

  Preferably, the transfer sheet is provided with an earth line (53) and the signal line (54) is provided corresponding to each key of the key unit connected to the connector portion. (Claim 8). Preferably, an elastic sheet (41) provided corresponding to each key of the keyboard portion and having an elastic bulge portion (46) driven by the corresponding key to apply a restoring force to the key is provided in the laminated layer. Laminated on the sheet (claim 9).

  In addition, the code | symbol in the said parenthesis is an illustration.

  According to claim 1 of the present invention, the key can be made compact in the longitudinal direction while maintaining an appropriate parallel movement of the key.

  According to claim 2, it can be made more compact in the longitudinal direction. According to the third aspect, the parallel movement of the key can be stabilized. According to the fourth aspect, the parallel maintaining means for each key can be arranged compactly in the key width direction. According to the fifth aspect, it is possible to suppress the tilt of the key to the left and right during the performance operation.

  According to the sixth aspect of the present invention, it is possible to provide a structure in which the key range can be increased while the instrument is made compact in the vertical direction.

  According to the seventh aspect, the electrical connection portion between the sheet and the substrate can be prevented from being bulky in the vertical direction. According to the eighth aspect of the present invention, the transfer sheet is composed of one sheet, and an increase in thickness can be avoided. According to the ninth aspect of the present invention, the key returning mechanism is constituted by a single sheet, and an increase in thickness can be avoided.

1 is a perspective view of an electronic keyboard instrument as a keyboard device according to an embodiment of the present invention and a key unit connected to the electronic keyboard instrument (FIG. 1A), and a plan view of the left half of the electronic keyboard instrument (FIG. 2B). is there. It is a perspective view which shows the inside of the right side from the upper cover of an electronic keyboard instrument. It is a perspective view (figure (a)) which shows the inside of the latter half part of an electronic keyboard musical instrument, a front view (figure (b)) of a locking part, and a front view (figure (c)) of a shaft support part. FIG. 1B is a cross-sectional view taken along line AA in FIG. 1B (FIG. 1A), and a cross-sectional view of the switch sheet focusing on one switch structure (FIG. 2B). It is the top view which showed the switch sheet except a rubber sheet in order of lamination. It is a schematic diagram which shows the electrical connection relationship in the state in which the key unit was connected to the electronic keyboard instrument. It is typical sectional drawing which shows the connection part of a switch sheet | seat and a board | substrate. It is a right view of an electronic keyboard instrument. It is sectional drawing (a figure (a), (b)) which shows the white key of a modification, and the composition corresponding to it. It is typical sectional drawing which shows the connection part of a switch sheet | seat and a board | substrate at the time of employ | adopting the fixing | fixed part of a modification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1A is a perspective view of an electronic keyboard instrument as a keyboard device according to an embodiment of the present invention and a key unit connected thereto. This keyboard device is configured as an electronic keyboard instrument 100.

  The electronic keyboard instrument 100 is provided with a keyboard unit KB including a plurality of keys (white key WK and black key BK). The names of the white key and the black key in the electronic keyboard instrument 100 are imitations of the white key and the black key in a general keyboard instrument, and it is not essential that the colors are white and black. The white key WK and the black key BK are distinguished only by their relative arrangement positions. When the white key WK is particularly specified and called, the white key WK1 is referred to. Hereinafter, the longitudinal direction of the keys is defined as the front-rear direction, and the arrangement direction of the keys is defined as the left-right direction.

  The area on the left side (one end side) of the keyboard KB (the left end 100a of the electronic keyboard instrument 100) is covered by the upper cover 13. On the right side (the other end side) of the keyboard part KB (the right end part 100b of the electronic keyboard instrument 100), a connector part 15 for connecting the additional musical instrument adjacently is provided. The keyboard part KB is configured such that each of the white key WK and the black key BK moves substantially parallel to the pressing direction (the vertical direction and the direction perpendicular to the key pressing surface) while keeping the upper surface horizontal. It is configured as a so-called parallel keyboard. A side portion of the black key BK is a recessed portion 14. In FIG. 1A, the white key WK and the black key BK are in the non-operation position. When the white key WK and the black key BK are at the key press end position, the upper surfaces of the white key WK and the black key BK are substantially flush with the recessed portion 14. Therefore, the glissando performance is easy.

  FIG. 1B is a plan view of the left half of the electronic keyboard instrument 100. FIG. 1B shows a state in which a part of the key is removed in addition to the upper cover 13 and a key frame 20 (see FIG. 2) described later. By connecting and connecting the key unit 200 to the connector unit 15, the key area can be increased. If the electronic keyboard instrument 100 is considered as a master unit, the key unit 200 connected to the electronic keyboard instrument 100 corresponds to an extension slave unit.

  FIG. 2 is a perspective view showing the inside on the right side of the upper cover 13 of the electronic keyboard instrument 100. FIG. 3A is a perspective view showing the inside of the second half of the electronic keyboard instrument 100. FIG. 4A is a cross-sectional view taken along the line AA in FIG.

  The electronic keyboard instrument 100 includes a base 10 that forms the bottom and a key frame 20. A key frame 20 is disposed on the base 10. A five-layer switch sheet S <b> 5 is disposed between the base 10 and the key frame 20. In the left part of the electronic keyboard instrument 100, the upper cover 13 is disposed above the base 10, but the key frame 20 does not extend below the upper cover 13. A stepped portion 24 protruding upward is formed in a region where the white key WK and the black key BK are not arranged at the rear portion of the key frame 20, and the upper surface of the stepped portion 24 is below the uppermost surface of the electronic keyboard instrument 100. It becomes the hollow part 14 dented in (FIG. 2). A substrate 11 is disposed on the base 10 below the upper cover 13, and a control unit 12 including a sound source is mounted on the substrate 11 (FIG. 1B).

  Since each key and each partial configuration such as the key frame 20 corresponding to each key are substantially common between the keys, the white key WK1 and the corresponding configuration will be described in detail as a representative. A switch hole 21 is formed in the base surface 20a which is the upper surface of the main region of the key frame 20, and cylindrical guide portions 22f and 22r are formed to project upward from the front and rear of the switch hole 21 (FIG. 2). FIG. 4 (a)). The guide portions 22f and 22r have guide holes 22fa and 22ra, respectively (FIGS. 2 and 4A).

  As shown in FIG. 2, locking portions 23 f and 23 r are provided on the key frame 20 so as to protrude from the front and rear of the switch hole 21 and slightly on the right side. The locking portions 23f and 23r are located between the guide portion 22f and the guide portion 22r in the front-rear direction. The locking portions 23f and 23r are located between the elastic bulging portion 46 and the guide portion 22f that apply a restoring force to the key, and between the elastic bulging portion 46 and the guide portion 22r, respectively. Further, the locking portions 23f and 23r are located within the width of the corresponding white key WK1 (see also FIG. 1B).

  As shown in FIG. 4A, the white key WK1 includes an actuator 31 and two front and rear guided portions 32f and 32r, both of which project downward from the key body. The guided portions 32f and 32r are disposed on both sides of the actuator 31 in the longitudinal direction of the white key WK1, and the guided portion 32f is positioned on the front side (see also FIG. 1B). The guided portions 32f and 32r are provided corresponding to the guide portions 22f and 22r, and are guided by the inner surfaces of the guide holes 22fa and 22ra. The actuator 31 corresponds to the position of the switch hole 21.

  Shaft support portions 33f and 33r are formed in the front and rear at the lower left portion of the white key WK1. In the front-rear direction, the shaft support portion 33 f is located between the guided portion 32 f and the actuator 31, and the shaft support portion 33 r is located between the guided portion 32 r and the actuator 31.

  The details of the five-layer switch sheet S5 will be described later with reference to FIGS. 5 and 6, etc., but the uppermost sheet is a rubber sheet 41 (FIG. 1B, FIG. a)). The switch sheet S5 is provided with a switch part SW (movable contact 42a and fixed contact 44a) corresponding to each key. The rubber sheet 41 is formed with an elastic bulge 46 having an actuator 47 for turning on and off each switch SW. The elastic bulge portion 46 corresponds to the position of the actuator 31 so that the elastic bulge portion 46 is pushed down by the actuator 31. In plan view, the maximum outer shape of the bottom of the elastic bulging portion 46 is larger than the maximum outer shape of the actuator 31.

  In the black key BK, as shown in FIG. 2, a relief portion 48 is cut out on the lower surface of the side wall of the key. The configuration of the elastic bulging portion 46 is the same as that of the white key WK. This prevents the side wall of the black key BK from coming into contact with the corresponding elastic bulge portion 46 during a pressing operation, and the large-sized elastic bulge portion 46 is disposed while maintaining a compact size in the vertical direction. It is possible. Alternatively, depending on the design, it is advantageous to reduce the width of the black key BK.

  The elastic bulging portion 46 is driven by a corresponding key to give a restoring force to the key. In the non-operating state, the elastic bulging portion 46 is slightly crushed and urges the key in the direction of the non-key pressing position. The guided portions 32f and 32r are inserted into the guide holes 22fa and 22ra of the guide portions 22f and 22r, respectively. A flange is fixed to the lower ends of the guided portions 32f and 32r via a washer or the like to prevent it from coming off. The non-key-pressing position of the white key WK1 is restricted by the reaction force (biasing force) from the elastic bulging portion 46. Further, the white key WK1 pressed to the key pressing end position returns to the non-key pressing position by the reaction force from the elastic bulging portion 46.

  As shown in FIG. 2, a parallel maintaining member 34 is interposed between the base surface 20a of the key frame 20 and the white key WK1 as a parallel maintaining means for maintaining the parallel state of the vertically moving key. . The parallel maintaining member 34 is made of a bar member and has a shape obtained by removing a part of a rectangle in plan view. The parallel maintaining member 34 is integrally formed of, for example, a metal having a circular cross section, and includes an extending portion 35, connecting portions 36f and 36r, and movable portions 38f and 38r. The extending portion 35 is extended in the longitudinal direction of the key. The connecting portions 36f and 36r are connected to the front end portion and the rear end portion of the extending portion 35, respectively, and the movable portions 38f and 38r are connected to the connecting portions 36f and 36r. That is, the movable portions 38f and 38r are connected to the extending portion 35 by the connecting portions 36f and 36r.

  FIG. 3B is a front view of the locking portion 23r. FIG. 3C is a front view of the shaft support portion 33r. Since the configuration of the locking portion 23f is the same as that of the locking portion 23r and the configuration of the shaft support portion 33f is the same as that of the shaft support portion 33r, the lock portion 23r and the shaft support portion 33r will be mainly described.

  As shown in FIG.3 (b), the latching | locking part 23r has the recessed part 23ra opened in a U shape on the right side. The movable portion 38r engages with the recess 23ra so as to be slidable in the left-right direction (key width direction) within the recess 23ra. The locking portion 23r does not protrude from the right side end position of the white key WK1, and is disposed within the key width B. The movable range in the left-right direction of the movable part 38r corresponding to the movement of the white key WK1 from the non-key-pressed position to the key-pressed end position is a range that is within the recess 23ra and does not contact the bottom 23ra1 of the recess 23ra. The relationship between the locking portion 23f and the movable portion 38f is the same as this.

  As shown in FIG. 3C, a bearing portion 33ra that opens downward is formed in the shaft support portion 33r. The bearing portion 33ra is substantially semicircular when viewed from the front, but the angle range of the curved surface having a predetermined radius of curvature is 180 degrees or more. A narrow portion 33rb having a width slightly smaller than twice the radius of curvature of the bearing portion 33ra is formed to be connected to the lower portion of the bearing portion 33ra. The radius of curvature of the bearing portion 33ra is slightly larger than the diameter of the extending portion 35. The extending portion 35 engages with the bearing portion 33ra so as to be rotatable within the bearing portion 33ra. The relationship between the shaft support portion 33f and the extending portion 35 is the same as this.

  The parallel maintaining member 34 is arranged as follows. First, the extending portion 35 is engaged with the bearing portion 33ra through the narrow portion 33rb of the white key WK1. The narrow portion 33rb is slightly smaller than the diameter of the extending portion 35. Accordingly, the extended portion 35 is fitted to the bearing portion 33ra in a simple retaining state by the narrow portion 33rb. Moreover, the fitting operation is easy. Similarly, the extending portion 35 is engaged with the shaft support portion 33f. Thus, when the white key WK1 to which the parallel maintaining member 34 is attached is disposed on the base surface 20a, the movable portion 38r is engaged with the concave portion 23ra of the locking portion 23r from the right side. At the same time, the movable portion 38f is also engaged with the locking portion 23f. In addition, since the movable parts 38f and 38r are short in the front-rear direction, the connecting parts 36f and 36r may be once bent to be engaged with the locking parts 23f and 23r from the front-rear direction.

  In this way, the extending portion 35 is rotatable with respect to the white key WK1 about the axial direction of the extending portion 35, and the movable portions 38f and 38r are locked with respect to the locking portions 23f and 23r. Displaceable in the width direction. The connecting portions 36f and 36r are inclined so that the right side is lowered when viewed from the front. The configuration corresponding to the other white key WK regarding the arrangement of the parallel maintaining member 34 is the same as that of the white key WK1.

  When the white key WK1 is pressed from the non-pressed position, the guided portions 32f and 32r are guided to the guide holes 22fa and 22ra of the guide portions 22f and 22r. The key is displaced in parallel to the key pressing end position while keeping However, the white key WK1 is long in the front-rear direction, and the key pressing position is not always the center in the front-rear direction, but is often the front. Therefore, the white key WK1 has a force that tilts in the front-rear direction, and there is a possibility that the guidance by the guide portions 22f and 22r may not be smooth. Therefore, the parallel state is maintained by interposing the parallel maintaining member 34. As long as the extending portion 35 does not twist when the key is depressed, the white key WK1 appropriately translates.

  When the white key WK1 is displaced in the vertical direction, the extending portion 35 is rotated by the shaft support portions 33f and 33r. Accordingly, the movable portions 38f and 38r are displaced in the key width direction with respect to the locking portions 23f and 23r, so that the inclination angles of the connection portions 36f and 36r are changed. Since the extending portion 35 is long in the front-rear direction, it functions to keep the white key WK1 parallel in the front-rear direction in the process of the white key WK1 being displaced in the up-down direction. Thereby, the parallel movement of the key can be stabilized.

  Note that the black key BK has a short length in the front-rear direction and is not easily tilted in the front-rear direction. Therefore, although it is a structure which does not require the parallel maintenance member 34, you may provide similarly to the white key WK.

  FIG. 4B is a cross-sectional view of the switch sheet S5 focusing on one switch structure. Since the thickness of each sheet is very thin, in FIG. 4B, the thickness direction of the sheet portion is exaggerated and drawn to facilitate understanding of the structure. The switch sheet S5 is formed by laminating a rubber sheet 41, an upper sheet 42, a spacer sheet 43, a lower sheet 44, and a transfer sheet 45 in order from the top. Of these, the upper sheet 42, the spacer sheet 43, and the lower sheet 44 constitute a three-layer sheet S3 having a laminated structure having a function of detecting each key operation and outputting a detection signal. The rubber sheet 41 is formed with an elastic bulging portion 46 protruding upward corresponding to each key. An actuator 47 is suspended from the ceiling 461 of the elastic bulge 46.

  FIG. 5 is a plan view showing the switch sheets S5 excluding the rubber sheet 41 in the stacking order. FIG. 6 is a schematic diagram showing an electrical connection relationship in a state where the key unit 200 is connected to the electronic keyboard instrument 100. Since FIG. 5 is shown in a plan view, the line printed on the upper surface of the sheet is indicated by a solid line, and the line printed on the lower surface of the sheet is indicated by a dotted line. The left end portions (left side in FIG. 5) of the sheets 42, 44, 45 are electrically connected to the control unit 12 via the substrate 11.

  As shown in FIG. 5, a movable contact 42a is provided on the back surface (lower surface) of the upper sheet 42 corresponding to the actuator 47 of each key (see also FIG. 4B). A signal line 52 (a black key line 52B and a white key line 52W) extends from each of the movable contacts 42a to the left end of the upper sheet 42. Further, an earth line 51 is laid on the left end portion of the upper sheet 42 adjacent to the back side (rear side) of the signal line 52.

  The spacer sheet 43 has a hole 43a corresponding to the movable contact 42a. A fixed contact 44a is provided on the surface (upper surface) of the lower sheet 44 in correspondence with the movable contact 42a (see also FIG. 4B). The switch part SW is comprised by the movable contact 42a and the fixed contact 44a. Regarding the fixed contact 44a, the rear black key BK is connected in series with the earth line 55, and the front white key WK is connected in series with the earth line 55. Connected on the left side, the end 55a of the connected portion reaches the left end of the protruding piece 44c of the lower sheet 44.

  In the transfer sheet 45, signal lines 54 (black key line 54 </ b> B and white key line 54 </ b> W) are extended to the left end of the transfer sheet 45. Further, an earth line 53 is laid on the left end portion of the transfer sheet 45 adjacent to the back side (rear side) of the signal line 54.

  Since the spacer sheet 43 exists between the upper sheet 42 and the lower sheet 44, as shown in FIG. 4B, in the non-key-pressed state, the movable contact 42a and the fixed contact 44a pass through the hole 43a. It is in a separated state. When the key is pressed and the elastic bulge 46 is driven to be pressed by the actuator 31, the upper sheet 42 is pressed by the actuator 47, and the movable contact 42a and the fixed contact 44a come into contact (make). As a result, the key depression is detected.

  For example, in FIG. 6, the white key WK (pitch C1) is exemplified, and the signal line 52 connected to the movable contact 42a of the white key WK (pitch C1) and the fixed contact of the white key WK (pitch C1). The contact with the earth line 55 connected to 44a is conducted. Thereby, the ON detection signal of the white key WK (pitch C1) is sent to the control unit 12, and it is detected that the key is pressed. As an actual pitch, C1 is a so-called center C.

  On the other hand, in the key unit 200 serving as a slave unit, four layers of sheets 41 to 44 excluding the transfer sheet 45 are disposed in the same manner as the electronic keyboard instrument 100 serving as a master unit (see FIG. 6). The signal line 52 of the upper sheet 42 and the ground line 55 of the lower sheet 44 in the key unit 200 are electrically connected to the signal line 54 and the ground line 53 of the transfer sheet 45 in the electronic keyboard instrument 100 via the connector unit 15, respectively. (FIGS. 5 and 6). The ground line 51 of the upper sheet 42 in the key unit 200 is not used.

  The signal line 54 of the transfer sheet 45 is a signal line for transferring a detection signal output from the key unit 200 connected to the connector unit 15 to the control unit 12. When a key is depressed in the key unit 200 in the same manner as the electronic keyboard instrument 100, the ON detection signal is transmitted from the key unit 200 to the signal line 52 and the lower sheet of the upper sheet 42 corresponding to the depressed key. The signal is transferred from the ground line 55 of 44 to the signal line 54 and the ground line 53 of the transfer sheet 45 of the electronic keyboard instrument 100 via the connector unit 15. Then, a detection signal is supplied to the control unit 12 through the signal line 54 and the earth line 53.

  Although not shown in detail, the control unit 12 includes a sound source circuit, an effect circuit, and the like in addition to the CPU, ROM, and RAM. The control unit 12 can generate a musical tone signal based on the detection signal and output a musical tone having a pitch corresponding to the pressed key. With respect to the key range, the control unit 12 controls the key unit 200 so as to be in charge of a pitch higher than that of the electronic keyboard instrument 100. Therefore, connecting the key unit 200 substantially expands the sound range. Although a headphone terminal (not shown) is provided as an output interface for musical sounds, a speaker may be incorporated in the upper cover 13 or the like.

  An example of a connection mode of the earth lines 51, 53, 55 and the signal lines 52, 54 to the substrate 11 will be described with reference to FIG. FIG. 7 is a schematic cross-sectional view showing a connection portion between the switch sheet S5 and the substrate 11, and the thickness direction is exaggerated. The switch sheet S5 is fixed to the substrate 11 at the fixing portion T at the left end. Fastening holes (not shown) are formed in the sheets 42 and 45. A resin upper pressing portion 64 and a rubber material 63 are placed on the upper side of the substrate 11, and a resin lower pressing portion 65 and a rubber material 66 are disposed on the lower side of the substrate 11, and the sheets 42 and 45 hold the substrate 11. The screw 61 and the nut 62 are tightened together so as to be sandwiched from above and below. For the lower sheet 44, only the protruding piece 44 c that extends to a position slightly to the right of the left end of the upper sheet 42 is sandwiched between the upper sheet 42 and the substrate 11. Accordingly, the substrate 11 is sandwiched in the thickness direction by the left end portion of the upper sheet 42 and the protruding piece 44 c of the lower sheet 44 and the left end portion of the transfer sheet 45.

  Terminals corresponding to the signal line 52 and the earth line 51 are provided on the upper surface of the substrate 11 and facing the upper sheet 42. On the other hand, terminals corresponding to the signal line 54 and the earth line 53 are provided on the lower surface of the substrate 11 and facing the transfer sheet 45. The end 55a of the ground line 55 provided on the protruding piece 44c of the lower sheet 44 is electrically connected to the terminal of the substrate 11 via the ground line 51 of the upper sheet 42.

  FIG. 8 is a right side view of the electronic keyboard instrument 100. The connector unit 15 is provided at the right end of the electronic keyboard instrument 100. The connector unit 15 includes a signal terminal group 16, one ground terminal 17, and a plurality of magnets 18. The signal terminal group 16 includes a plurality of signal terminals 16 a, and each of the signal terminals 16 a is electrically connected to the right end portion of the signal line 54 of the transfer sheet 45. The ground terminal 17 is electrically connected to the right end portion of the ground line 53 of the transfer sheet 45.

  A connector portion corresponding to the connector portion 15 is also formed at the left end portion of the key unit 200 to be connected. When the key unit 200 is connected to the connector unit 15, the terminal group connected to the signal line 52 of the upper sheet 42 and the terminal connected to the ground line 55 of the lower sheet 44 in the key unit 200 are respectively signal terminals of the connector unit 15. The group 16 and the ground terminal 17 are electrically connected. The key unit 200 is provided with a magnetic part facing the magnet 18, and the physical connection between the connector part 15 and the key unit 200 is stably maintained.

  According to the present embodiment, the entire parallel maintaining member 34 exists between the guided portion 32f and the guided portion 32r in the longitudinal direction of the key in a plan view, so that the appropriate parallel movement of the key is maintained. However, it can be made compact in the longitudinal direction. In particular, since the connecting portions 36f and 36r are present inside the guided portion 32f and the guided portion 32r in the front-rear direction, the guided portion 32f and the guided portion 32r are disposed as far as possible in the front-rear direction. Becomes easy. As a result, there is an advantage that guideability by the guided portion 32 is improved.

  Further, since the movable ranges of the movable portions 38f and 38r of the parallel maintaining member 34 corresponding to the operation range from the non-operation position of the key to the key pressing end position are within the range of the key width B of the corresponding key, the parallel maintenance is performed. The member 34 can be compactly arranged in the key width direction without protruding to the side of the key.

  Also according to the present embodiment, the transfer sheet 45 having the signal line 54 for transferring the detection signal output from the key unit 200 connected to the connector unit 15 to the control unit 12 is the three-layer sheet S3. Since it is disposed in a laminated state under the lower sheet 44, it is possible to make a structure that can increase the key range while making the instrument compact in the vertical direction.

  Further, since the substrate 11 is sandwiched in the thickness direction by the end portion of the upper sheet 42 and the end portion of the transfer sheet 45, the electrical connection portion between each sheet and the substrate 11 should not be bulky in the vertical direction. Can do. Moreover, since the bending of the connection portion of the switch sheet S5 with the substrate 11 is not so much caused by the screw tightening, the possibility of poor connection is reduced.

  Since the transfer sheet 45 is provided with a ground line 53 and a signal line 54 corresponding to each key of the key unit 200, the sheet for transferring the signal is composed of one sheet and the thickness is increased. Can be avoided. In addition, since the rubber sheet 41 having the elastic bulging portion 46 that applies a restoring force to the key is laminated on the three-layer sheet S3, the key returning mechanism is constituted by a single sheet, An increase can be avoided.

  From the viewpoint of making the musical instrument compact in the longitudinal direction, at least portions corresponding to the connecting portions 36f and 36r of the parallel maintaining member 34 are between the guided portion 32f and the guided portion 32r in the longitudinal direction of the key. What is necessary is just to comprise so that it may exist.

  FIGS. 9A and 9B are cross-sectional views showing a white key of a modified example and a configuration corresponding thereto. These figures correspond to a cross section taken along line BB in FIG. For example, as illustrated in FIG. 9A, if the connecting portions 36f and 36r are arranged between the guided portions 32f and 32r, the extending portion 35 exceeds the positions of the guided portions 32f and 32r. It may be long before and after. In the example of FIG. 9A, the positional relationship between the locking portions 23f and 23r and the shaft support portions 33f and 33r, and the extending portion 35 and the movable portion 38f, The positional relationship with 38r is opposite in the left-right direction.

  Further, as shown in FIG. 9B, the guided portions 32f and 32r and the guide portions 22f and 22r may be formed long in the left-right direction (key width direction). In this way, the tilt of the operated key in the left-right direction can be suppressed, and the performance of glissando and the like becomes smooth. Further, if the width of the guided portion 32 in the front-rear direction can be reduced thereby, the distance between the connection portions 36f and 36r can be set longer, and the function of maintaining parallelism is more appropriately performed.

  In addition, the structure of the fixing | fixed part which fixes the left end part of switch sheet S5 to the board | substrate 11 is not restricted to the structure shown in FIG. FIG. 10 is a schematic cross-sectional view showing a connecting portion between the switch sheet S5 and the substrate 11 when the modified fixing portion is employed, and the thickness direction is exaggerated. The fixing portion T2 is a connector type and includes an upper fixing portion 71 and a lower fixing portion 72. A terminal pin 75 is suspended from the upper fixing portion 71 in correspondence with the signal line 52 and the ground line 51 of the upper sheet 42. The terminal pin 75 penetrates the substrate 11 downward. From the lower fixing portion 72, terminal pins 76 project upward corresponding to the signal line 54 and the earth line 53 of the transfer sheet 45. The terminal pins 76 penetrate the substrate 11 upward. In the front-rear direction, the terminal pin 75 and the terminal pin 76 are arranged so as to be shifted in position so as not to interfere with each other. The terminal pins 75 and 76 are electrically connected to the control unit 12.

  The left end portion of the upper sheet 42 is inserted into the insertion port 73 formed in the upper fixing portion 71, and the signal line 52 and the earth line 51 are electrically connected to the terminal pin 75. The left end portion of the transfer sheet 45 is inserted into the insertion opening 74 formed in the lower fixing portion 72, and the signal line 54 and the earth line 53 are electrically connected to the terminal pins 76.

  In the same way as described with reference to FIG. 7, the lower sheet 44 may have a configuration in which only the protruding piece 44 c is overlapped under the upper sheet 42 to be the insertion port 73. Alternatively, the end 55a of the earth line 55 provided on the protruding piece 44c may be separately connected to the terminal portion of the substrate 11 via a jumper wire and a through hole. Alternatively, the protruding piece 44 c is formed so as to be positioned behind the upper sheet 42, a terminal pin corresponding to the end 55 a is provided adjacent to the terminal pin 75, and the protruding piece 44 c is inserted into the insertion port 73. The end 55a may be electrically connected to the terminal pin.

  Although the present invention has been described in detail based on preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms within the scope of the present invention are also included in the present invention. included.

KB keyboard part, WK white key, BK black key, SW switch part, S3 3 layer sheet (laminated sheet), 11 substrate, 12 control part (musical sound generating part), 15 connector part, 20 key frame (frame), 22f guide Part (first guide part), 22r guide part (second guide part), 31 actuator, 32f guided part (first guided part), 32r guided part (second guided part), 34 Parallel maintaining member (parallel maintaining means), 35 extending portion, 36f connecting portion (first connecting portion), 36r connecting portion (second connecting portion), 38f movable portion (first movable portion), 38r movable portion (Second movable part), 41 rubber sheet (elastic sheet), 42 upper sheet, 42a movable contact, 43 spacer sheet, 43a hole, 44 lower sheet, 44a fixed contact, 45 transfer sheet, 6 resilient bulging portion (biasing means), 53 ground line, 54 signal line, 100 electronic keyboard musical instrument, 100a left end, 100b right end, 200 key unit

Claims (9)

A keyboard device having a plurality of keys that move substantially parallel to the pressing direction from a non-operating position to a key pressing end position when pressed,
A frame on which each key is disposed;
An actuator projecting downward from the key;
A first guided portion and a second guided portion provided on the key on both sides of the actuator in the longitudinal direction of the key;
An urging means disposed on the frame corresponding to the actuator and driven by the actuator to urge the depressed key toward the non-operation position;
The key is disposed on the frame corresponding to the first guided portion and the second guided portion, and is engaged with the first guided portion and the second guided portion, respectively. A first guide part and a second guide part for guiding the operation;
Parallel maintaining means for maintaining a parallel state when each key is operated,
The parallel maintaining means includes an extending portion that extends in the longitudinal direction of the key and is rotatable with respect to the key, and a movable portion that is displaceable in the width direction of the key with respect to the frame. And a connecting portion that connects the extending portion and the movable portion,
The keyboard device according to claim 1, wherein the connecting portion is present between the first guided portion and the second guided portion in a longitudinal direction of the key in a plan view.   2. The keyboard according to claim 1, wherein the parallel maintaining means is present between the first guided portion and the second guided portion in the longitudinal direction of the key in a plan view. apparatus.   The connection portion includes a first connection portion and a second connection portion, the movable portion includes a first movable portion and a second movable portion, and the first movable portion is the first movable portion. And the second movable part is connected to the extension part by the second connection part. In plan view, the first connection part is connected to the extension part. It exists between the first guided portion and the biasing means in the longitudinal direction, and the second connecting portion is between the second guided portion and the biasing means in the longitudinal direction of the key. The keyboard device according to claim 1, wherein the keyboard device is present in the keyboard.   The movable range of the movable part of the parallel maintaining means corresponding to the operation range from the non-operation position of the key to the key pressing end position is within the range of the width of the corresponding key. 4. The keyboard device according to any one of items 3.   The length of the width direction of the key of the said 1st guide part and the said 2nd guide part is longer than the length of the longitudinal direction of the said key, The any one of Claims 1-4 characterized by the above-mentioned. The keyboard device according to item. A keyboard portion having a plurality of keys;
A musical sound generator that is arranged on one end side of the keyboard part in the key arrangement direction and generates a musical sound signal based on a detection signal;
A laminated sheet having a laminated structure having a function of detecting each operation of the key and outputting a detection signal;
A connector part for connecting a key unit having a plurality of keys, arranged on the other end side of the keyboard part in the key arrangement direction;
A transfer sheet having a signal line for transferring a detection signal output from the key unit connected to the connector unit to the musical sound generation unit;
The electronic keyboard instrument, wherein the transfer sheet is arranged in a laminated state with respect to the laminated sheet. The laminated sheet is disposed between the upper sheet and the lower sheet having an upper sheet and a lower sheet each having a contact corresponding to each key, and a hole corresponding to the contact, and the key is not operated. A spacer sheet that separates the contact points of the upper sheet and the lower sheet in a state,
The transfer sheet is disposed under the lower sheet;
The electronic keyboard instrument according to claim 6, wherein a board on which the musical sound generating unit is mounted is sandwiched between an end portion of the upper sheet and an end portion of the transfer sheet.   The grounding line is disposed on the transfer sheet, and the signal line is disposed corresponding to each key of a key unit connected to the connector portion. 7. The electronic keyboard instrument according to 7. An elastic sheet provided corresponding to each key of the keyboard part and having an elastic bulge that is driven by the corresponding key and applies a restoring force to the key is laminated on the laminated sheet. The electronic keyboard instrument according to any one of claims 6 to 8.

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