Operation display device and electronic musical instrument

Abstract

To provide an operation display device that can effectively utilize space and improve the operability of touch operation, and an electronic musical instrument comprising such an operation display device.SOLUTION: An operation display part comprises: a circuit board 42; a sheet metal member 46 which has a plate-like part 46a, a sheet metal opening part 46b provided at the plate-like part 46a, and a first leg part and a second leg part supporting the plate-like part 46a on the circuit board 42; and an LED 43 which is provided on the circuit board 42 corresponding to the sheet metal opening part 46b, and changes in light emission mode according to change in electrostatic capacity accompanying touch operation on the sheet metal member 46; wherein the first leg part and second leg part are bent from an opening end of the sheet metal opening part 46b toward the circuit board 42.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an operation display device and an electronic musical instrument. [Background technology]

[0002] Conventionally, electronic musical instruments such as electronic pianos have been known to have an operation display device on a panel of a case, the operation display device including switches for performing various operations such as demo performances, changing tone colors and brightness, and a light source that changes the light emission mode in response to various operations. For example, Patent Document 1 discloses an electronic keyboard instrument in which switches for changing tone colors, etc., switch buttons for operating the switches, and indicator lamps are mounted on a circuit board. In this electronic keyboard instrument, the switch buttons and indicator lamps are provided on the operation panel. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 7-16993 Summary of the Invention [Problem to be solved by the invention]

[0004] Recently, operation display devices have been proposed that use touch panel-type touch switches instead of push switches to perform the various operations described above. For example, a capacitance-type touch switch requires the placement of an electrode to detect changes in capacitance. However, if a light source or other device is to be placed in the limited space on the panel, the space available for the switch is limited due to the constraints imposed by the routing of connecting wires on the board. This results in the various switches being spaced far apart, potentially reducing the operability of touch operations.

[0005] An object of the present invention is to provide an operation display device that can effectively utilize space and improve the operability of touch operations, and an electronic musical instrument equipped with such an operation display device. [Means for solving the problem]

[0006] The operation display unit according to one aspect of the present invention is a metal member including a substrate, a plate-shaped portion having an opening, and a plurality of legs that support the plate-shaped portion on the substrate. A metal member serving as an electrode whose capacitance changes in response to a touch operation. and a light source provided on the substrate corresponding to the opening, wherein the plurality of legs are bent from an opening end of the opening toward the substrate. and transmitting a signal relating to the change in capacitance to the substrate side. do. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide an operation display device that can effectively utilize space and improve the operability of touch operations, and an electronic musical instrument equipped with such an operation display device. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is an overall perspective view of an electronic keyboard instrument according to an embodiment; [Figure 2] FIG. 2 is a plan view showing a part of an operation display unit of the electronic keyboard instrument according to the embodiment. [Figure 3] 1 is a plan view of a touch switch in an electronic keyboard instrument according to an embodiment, with a metal plate member removed; [Figure 4] 4 is a cross-sectional view of the touch switch in the electronic keyboard instrument according to the embodiment, taken along the line IV-IV in FIG. 2. FIG. [Figure 5] FIG. 2 is a perspective view of a sheet metal member in the electronic keyboard instrument according to the embodiment. [Figure 6] FIG. 2 is a rear view showing a part of the operation display unit of the electronic keyboard instrument according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the present invention will be described with reference to the drawings. The electronic keyboard instrument (electronic musical instrument) 10 shown in Fig. 1 includes a keyboard section 20 having a plurality of white keys and a plurality of black keys, and a case 30. A control board and other components (not shown) are housed inside the case 30. Coordinate axes are shown in each figure, and in the following description, the X-axis direction in each figure is the left-right direction of the electronic keyboard instrument 10 (the positive X-axis direction is the leftward direction), the Y-axis direction in each figure is the front-rear direction of the electronic keyboard instrument 10 (the positive Y-axis direction is the forward direction), and the Z-axis direction in each figure is the up-down direction of the electronic keyboard instrument 10 (the positive Z-axis direction is the upward direction).

[0010] The case 30 is a horizontally elongated rectangle with its longitudinal direction extending left-to-right. Made of synthetic resin, it is divided into an upper case 32, a lower case 34, a left case 36, and a right case 38. The upper surfaces of the upper case 32, left case 36, and right case 38 are each provided with an acrylic upper panel 30a. The upper surface of the upper case 32 is provided with a power button 11 for turning the electronic keyboard instrument 10 on and off, a dial 12 for controlling the volume of musical tones, an LCD display 14, and an operation display unit (operation display device) 40 equipped with touch-panel touch switches. The upper surface of the left case 36 is provided with a pitch bender 36a for applying and controlling pitch bend to musical tones, setting buttons 36b for various settings, and the like. An earphone jack 36c is provided on the front surface of the left case 36.

[0011] The operation display unit 40 has seven touch switches TS on the left side of the LCD display unit 14, two touch switches TS on the right side of the LCD display unit 14, and three more touch switches TS spaced apart to the right of those. Each touch switch TS has a horizontally elongated, approximately rectangular shape with rounded corners in a plan view. Each touch switch TS is a switch for executing various functions related to the electronic keyboard instrument 10, and is assigned various operations such as demo performance, tone color, and brightness adjustment. Each touch switch TS also has an LED (light source) 43 with its light-emitting side facing upward, as described below. Characters and the like are printed in white in the area corresponding to each touch switch TS on the top panel 30a. When a touch switch TS is touched to execute various functions, the LED 43 of the corresponding touch switch TS lights up, causing the character and the like printed in the corresponding area on the top panel 30a to light up.

[0012] As shown in Fig. 4, the operation display unit 40 includes, in order from the bottom, a circuit board (substrate) 42, a reflective member 44, and a sheet metal member (metal member) 46. Furthermore, an upper panel 30a is disposed on the top surface of the operation display unit 40 (not shown in Fig. 4). In the portion of the operation display unit 40 shown in Fig. 2, touch switches TS are arranged in two rows, front and back, along the left-right direction. The operation display unit 40 is a capacitive touch panel, and the sheet metal member 46 functions as an electrode. That is, in the operation display unit 40, each touch switch TS detects a change in capacitance caused by a person's finger approaching the sheet metal member 46 in response to a touch operation via the upper panel 30a.

[0013] The circuit board 42 has a horizontally elongated, generally rectangular shape that extends across substantially the entire area of the operation display unit 40. One to five LEDs 43 are provided on the upper surface of the circuit board 42 in areas corresponding to each touch switch TS. In the area where the five LEDs 43 are provided, for example, three LEDs 43 that emit white light and two LEDs 43 that emit red light are combined. The multiple LEDs 43 provided in each touch switch TS are arranged at equal intervals in the left-right direction with their light-emitting sides facing upward. In each touch switch TS, the light emission mode of the LEDs 43 changes in response to changes in capacitance.

[0014] Furthermore, one first mounting hole 42a and two second mounting holes 42b are provided on the upper surface of the circuit board 42 in areas corresponding to each touch switch TS, to which a sheet metal member 46 is attached (see FIG. 3). The first mounting hole 42a and the second mounting hole 42b are provided opposite each other with the LED 43 sandwiched therebetween. The first mounting hole 42a and the second mounting hole 42b are also arranged so that the line segments connecting the mounting holes 42a and 42b form a substantially equilateral triangle in plan view. Various wiring is routed on the lower surface of the circuit board 42. The configuration of the lower surface of the circuit board 42 will be described in detail later.

[0015] The reflective member 44 is made of a white synthetic resin and has light reflectivity. As shown in FIGS. 2 to 4 , the reflective member 44 has a horizontally elongated plate shape and is disposed between the circuit board 42 and the sheet metal member 46 in the vertical direction. The reflective member 44 is disposed within a sheet metal opening 46b of the sheet metal member 46 (described later) so as to surround the light-emitting side of the LEDs 43. The reflective member 44 includes a stepped portion 44a that protrudes upward in a stepped manner and is slightly smaller than the outline of the touch switch TS in a plan view. A light source opening 44b having a horizontally elongated, approximately rectangular shape is provided on the upper surface of the stepped portion 44a above the LEDs 43, allowing light from the LEDs 43 to be emitted. Furthermore, the upper surface of the stepped portion 44a includes a horizontally elongated, rectangular first mounting opening 44c above the first mounting hole 42a, and a horizontally elongated, rectangular second mounting opening 44d above the second mounting holes 42b.

[0016] As shown in FIGS. 3 and 4 , the light source opening 44b has an inner surface that bends inward from the opening edge of the light source opening 44b and extends onto the circuit board 42. This inner surface is provided in a shape that surrounds the light-emitting side of the LED 43. The light source opening 44b has an opening width that gradually increases from the lower side (circuit board 42 side) to the upper side (sheet metal member 46 side). In other words, the inner surface of the light source opening 44b has an inclined surface 44b1 that slopes outward from the circuit board 42 side to the sheet metal member 46 side. Light emitted from the LED 43 and reaching the inclined surface 44b1 is reflected by the inclined surface 44b1 to the outside of the light source opening 44b. At least the portion of the reflecting member 44 that corresponds to the inclined surface 44b1 is polished to enhance light reflectivity.

[0017] As shown in FIGS. 2 and 5, the sheet metal member 46 has a plate-shaped portion 46a with a substantially rectangular plate surface. The plate-shaped portion 46a is disposed above the step portion 44a of the reflecting member 44 and slightly spaced from the step portion 44a (see FIG. 4). The outline of the plate-shaped portion 46a substantially matches the outline of the touch switch TS in a plan view. That is, the area on the surface of the plate-shaped portion 46a is the area where the touch switch TS can be touched. A sheet metal opening (opening) 46b is provided in the center of the plate-shaped portion 46a, extending along the edge of the light source opening 44b and slightly larger than the light source opening 44b. The LEDs 43 in each touch switch TS are provided corresponding to both the light source opening 44b and the sheet metal opening 46b so that their light-emitting sides (upper sides) face the light source opening 44b and the sheet metal opening 46b.

[0018] The sheet metal member 46 also has a first leg portion 46c and a second leg portion 46d, which are multiple legs that bend at approximately right angles from the opening edge of the sheet metal opening 46b toward the circuit board 42. The first leg portion 46c bends from one of the four sides that make up the opening edge of the sheet metal opening 46b. The first leg portion 46c has an upper portion that is generally plate-shaped with its plate surface facing the front-rear direction and is inserted into the first mounting opening 44c of the reflecting member 44, and a lower portion that is generally prism-shaped and protrudes from the center of the upper portion in the left-right direction. The second leg portion 46d bends from one of the four sides that make up the opening edge of the sheet metal opening 46b, opposite the side from which the first leg portion 46c extends. The second leg portion 46d has an upper portion that is generally plate-shaped with its plate surface facing the front-rear direction and is inserted into the second mounting opening 44d of the reflecting member 44, and a lower portion that is generally prism-shaped and protrudes from both left-right ends of the upper portion.

[0019] The first leg 46c has a generally prismatic column-shaped portion, the tip of which serves as a first mounting portion 46c1, and is attached to the first mounting hole 42a of the circuit board 42. The second leg 46d has a generally prismatic column-shaped portion, the tip of which serves as a second mounting portion 46d1, and is attached to the second mounting hole 42b of the circuit board 42. The first mounting portion 46c1 and the second mounting portion 46d1 are inserted into the first mounting hole 42a and the second mounting hole 42b, respectively, and are attached to the circuit board 42 by being soldered (not shown) to the underside of the circuit board 42. As a result, the plate-shaped portion 46a is supported on the circuit board 42 with the reflective member 44 sandwiched therebetween. The plate-shaped portion 46a is stably supported on the circuit board 42 by support at three points, namely, the first mounting portion 46c1 and the two second mounting portions 46d1, which sandwich the LED 43. In addition, when the sheet metal member 46 is supported on the circuit board 42, the depth dimension S1 (see FIG. 4) from the opening of the sheet metal opening 46b to the circuit board 42 is, for example, 5 mm.

[0020] 4, the first and second mounting openings 44c, 44d provided in the reflecting member 44 have upper portions that open into the light source opening 44b. Therefore, when the first leg 46c is inserted into the first mounting opening 44c and the second leg 46d is inserted into the second mounting opening 44d, a portion of the first leg 46c and a portion of the second leg 46d are exposed in the light source opening 44b and the sheet metal opening 46b. Light emitted from the LED 43 that reaches the first and second legs 46c, 46d exposed in the openings is reflected by the first and second legs 46c, 46d to the outside of the light source opening 44b and the sheet metal opening 46b.

[0021] The configuration of the underside of the circuit board 42 will be described in detail. As shown in Figures 4 and 6, in each of the touch switches TS (areas surrounded by dashed lines in Figure 6) arranged in two front-to-rear rows along the left-to-right direction, the first mounting holes 42a are provided in the inner part of the circuit board 42, and the second mounting holes 42b are provided in the outer part of the circuit board 42. In other words, the first mounting holes 42a are provided in a position closer to the center of the circuit board 42 in the front-to-rear direction, and the second mounting holes 42b are provided in a position closer to the edge side of the circuit board 42 in the front-to-rear direction. The dimension S2 between adjacent first mounting holes 42a in the front-to-rear direction is, for example, 28 mm.

[0022] On the underside of the circuit board 42, a plurality of first wirings (connection wirings) 47a extending from each of the first mounting holes 42a and a plurality of second wirings 47b extending from each of the LEDs 43 are printed. One end of each of the first wirings 47a is electrically connected via solder to a first leg 46c of the sheet metal member 46 inserted through the first mounting hole 42a, and the other end extends to an IC (not shown) provided on the underside of the circuit board 42. As shown in FIG. 6, in a portion where the touch switches TS are provided in two rows, one in front and one in back, along the left-right direction, the first wirings 47a extending from each of the first mounting holes 42a are routed between adjacent touch switches TS in the front-to-back direction (between the first mounting holes 42a) and extend to the IC along the left-to-right direction. Therefore, the first wirings 47a are provided in positions that do not overlap with the areas of the touch switches TS in the up-down direction.

[0023] One end of the second wiring 47b is electrically connected to the LED 43 via solder, and the other end extends to the IC. The second wiring 47b is routed between the first mounting hole 42a and each second mounting hole 42b, i.e., from the position where the LED 43 is provided, to the outer portion of the circuit board 42, and the second wiring 47d extending from each touch switch TS is gathered together and extends to the IC. On the circuit board 42, a signal related to a change in capacitance caused by a touch operation of the touch switch TS is input to the IC via the first leg 46c, and a signal controlling the light emission mode of the LED 43 in accordance with the change in capacitance is output to the LED 43 of that touch switch TS.

[0024] As described above, the operation display unit 40 according to this embodiment includes the circuit board 42, the sheet metal member 46 having the plate-shaped portion 46a, the sheet metal opening 46b provided in the plate-shaped portion 46a, and the first leg 46c and second leg 46d that support the plate-shaped portion 46a on the circuit board 42, and the LED 43 that is provided on the circuit board 42 corresponding to the sheet metal opening 46b and changes its light emission mode in response to a change in capacitance accompanying a touch operation of the sheet metal member 46. The first leg 46c and the second leg 46d are bent from the opening end of the sheet metal opening 46b toward the circuit board 42.

[0025] Here, assuming that the operation display unit 40 has a configuration in which the first leg 46c and the second leg 46d of the sheet metal member 46 are bent from the outer edge of the sheet metal member 46, the first mounting hole 42a and the second mounting hole 42b are provided at positions on the circuit board 42 that overlap the outer edge of the sheet metal member 46 in the up-down direction. For this reason, if the width of the circuit board 42 in the front-to-back direction is limited, and touch switches TS are arranged in two rows, front and back, along the left-to-right direction on the circuit board 42, the distance between adjacent touch switches TS in the front-to-back direction will be narrow, making it impossible to ensure sufficient space for routing the first wiring 47a and the like between adjacent touch switches TS in the front-to-back direction.

[0026] In contrast, the operation display unit 40 according to this embodiment is configured as described above, and therefore the first mounting holes 42a and the second mounting holes 42b are provided on the circuit board 42 at positions that overlap in the up-down direction with the opening edges of the sheet metal openings 46b of the sheet metal member 46. This allows the first wiring 47a and the like to be routed from positions on the underside of the circuit board 42 that overlap in the up-down direction with the area of the touch switches TS. Therefore, even if the width of the circuit board 42 in the front-to-back direction is limited, by providing the first mounting holes 42a in the inner portion of the circuit board 42, it is possible to provide the touch switches TS in two front-to-back rows along the left-to-right direction, and still ensure space for routing the first wiring 47a and the like between adjacent touch switches TS in the front-to-back direction.

[0027] In this way, in the operation display unit 40, even if the front-to-rear width of the circuit board 42 is limited in the limited space on the top panel 30a, the touch switches TS can be arranged in two rows, front and rear, along the left-to-right direction, thereby making effective use of the space on the circuit board 42. As a result, the touch switches TS can be arranged close to each other in the limited space on the top panel 30a, improving the operability of touch operations.

[0028] Furthermore, of the first leg 46c and the second leg 46d of the operation display unit 40, the first leg 46c is connected to the first wiring 47a. This allows the first wiring 47a to be routed from the first mounting hole 42a to which the first leg 46c is attached, and allows the space on the circuit board 42 to be used more effectively.

[0029] The operation display unit 40 also includes a reflective member 44 that is light-reflective and is provided within the opening of the sheet metal opening 46b, surrounding the light-emitting side of the LED 43. This allows light emitted from the LED 43 toward the reflective member 44 to be reflected toward the opening side of the sheet metal opening 46b by the reflective member 44, thereby improving the brightness of the light emitted toward the opening side of the sheet metal opening 46b. As a result, the visibility of the operation display unit 40 can be improved, and the operability of touch operations can be further improved.

[0030] Furthermore, in the operation display unit 40, the reflecting member 44 has an inclined surface 44b1 that slopes outward from the circuit board 42 side toward the sheet metal opening 46b side. This allows light emitted from the LEDs 43 toward the reflecting member 44 to be efficiently reflected toward the opening side of the sheet metal opening 46b by the inclined surface 44b1 of the reflecting member 44. This further improves the brightness of the light emitted toward the opening side of the sheet metal opening 46b.

[0031] Furthermore, in the operation display unit 40, the plate surface of the plate-shaped portion 46a of the sheet metal member 46 is generally rectangular. Here, if the size of the touch switches TS provided on the upper panel 30a is the same, the surface area of the plate-shaped portion 46a having a generally rectangular shape is larger than that of the plate-shaped portion 46a having a generally circular shape. Therefore, if the size of the touch switches TS to be provided is limited, the generally rectangular shape of the plate-shaped portion 46a can expand the range of touch operation possible in a limited space. As a result, the touch sensitivity of the touch switches TS can be increased, improving the operability of touch operations.

[0032] Furthermore, in the operation display unit 40, the first leg 46c and the second leg 46d of the sheet metal member 46 are partially exposed within the opening of the sheet metal opening 46b. This allows light emitted from the LED 43 that is directed toward the first leg 46c and the second leg 46d to be reflected by the first leg 46c and the second leg 46d toward the opening side of the sheet metal opening 46b. Therefore, light emitted from the LED 43 that is directed toward a direction other than the opening side of the sheet metal opening 46b can be reflected toward the opening side of the sheet metal opening 46b by either the reflecting member 44, the first leg 46c, or the second leg 46d, further improving the brightness of the light emitted toward the opening side of the sheet metal opening 46b.

[0033] Furthermore, in the operation display unit 40, the first mounting portion 46c1 of the first leg 46c of the sheet metal member 46 and the two second mounting portions 46d1 of the second leg 46d support the plate-shaped portion 46a on the circuit board 42 at three points sandwiching the LED 43. This allows the plate-shaped portion 46a to be stably supported on the circuit board 42, thereby increasing the stability of touch operations and further improving the operability of touch operations.

[0034] Furthermore, the electronic keyboard instrument 10 according to this embodiment is equipped with an operation display unit 40. This allows the touch switches TS to be arranged close to each other, even when the space on the top panel 30a is limited, thereby improving the operability of touch operations. Therefore, it is possible to realize an electronic keyboard instrument 10 in which the touch operability of the operation display unit 40 is improved while the electronic keyboard instrument 10 is made smaller.

[0035] The above-described embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments may be embodied in various other forms, and various omissions, substitutions, and modifications may be made without departing from the spirit of the invention. These embodiments and their modifications are within the scope and spirit of the invention, and are also encompassed by the claims and their equivalents. For example, while the above embodiments illustrate examples of a pitch bender as a controller, other controllers such as a modulation wheel may also be used. Furthermore, while the above embodiments illustrate examples of an electronic keyboard instrument as an electronic musical instrument, other electronic musical instruments without a keyboard may also be used.

[0036] The invention described in the first claim of the present application is as follows: [1] A substrate; a metal member having a plate-shaped portion, an opening provided in the plate-shaped portion, and a plurality of legs for supporting the plate-shaped portion on the substrate; a light source that is provided on the substrate in correspondence with the opening, and that changes its light emission mode in response to a change in capacitance caused by a touch operation of the metal member; the plurality of legs are bent from an opening end of the opening toward the substrate; Operation display device. [2] The operation display device according to [1], wherein at least one of the plurality of legs is connected to a connection wiring provided on the substrate. [3] The operation display device according to [2], further comprising a reflective member having light reflectivity and arranged within the opening of the opening to surround the light emission side of the light source. [4] The operation display device according to [3], wherein the reflective member has an inclined surface that slopes outward from the substrate side to the opening side. [5] The operation display device according to any one of [1] to [4], wherein the plate surface of the plate-shaped portion is substantially rectangular. [6] The operation display device according to any one of [1] to [5], wherein a portion of the plurality of legs is exposed within the opening of the opening. [7] The operation display device according to any one of [1] to [6], wherein the plurality of legs support the plate-shaped portion on the substrate at least at three or more points sandwiching the light source. [8] An electronic musical instrument equipped with the operation display device according to any one of [1] to [7]. [Explanation of symbols]

[0037] 10 Electronic keyboard instrument 11 Power button 12 Dial 14 LCD display 20 Keyboard 30 Case 30a Top panel 32 Top case 34 Lower case 36 Left case 36a Pitch bender 36b Setting button 36c Earphone jack 38 Right case 40 Operation display section 42 Circuit board 42a First mounting hole 42b Second mounting hole 43 LED 44 Reflective material 44a Step portion 44b Light source opening 44b1 Inclined surface 44c First mounting opening 44d Second mounting opening 46 Sheet metal member 46a Plate-shaped portion 46b Sheet metal opening 46c First leg part 46c1 First mounting part 46d Second leg part 46d1 Second mounting part 47a First wiring 47b Second wiring S1 dimension S2 dimension TS Touch Switch

Claims

1. A substrate; a metal member having a plate-shaped portion with an opening and a plurality of legs supporting the plate-shaped portion on the substrate, the metal member serving as an electrode whose capacitance changes in response to a touch operation; a light source provided on the substrate corresponding to the opening; the plurality of legs are bent from an opening end of the opening toward the substrate and transmit a signal related to the change in capacitance to the substrate. Operation display device.

2. The operation display device according to claim 1 , wherein at least one of the plurality of legs is connected to a connection wiring provided on the substrate.

3. The operation display device according to claim 1 , further comprising a reflective member having light reflectivity and provided in the opening so as to surround the light emitting side of the light source.

4. The operation display device according to claim 3 , wherein the reflecting member has an inclined surface that is inclined from the substrate side to the opening side.

5. The operation display device according to any one of claims 1 to 4, wherein the plate surface of the plate-shaped portion is substantially rectangular.

6. The operation display device according to any one of claims 1 to 5, wherein the plurality of legs are partly exposed within the opening.

7. 7. The operation display device according to claim 1, wherein the plurality of legs support the plate-shaped portion on the substrate at least at three or more points sandwiching the light source.

8. An electronic musical instrument having the operation display device according to any one of claims 1 to 7.

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