JP2024041044A - Switch devices and electronic equipment - Google Patents

Abstract

[Problem] To provide a switch device capable of improving the quality of operation, and an electronic device equipped with such a switch device. [Solution] A volume knob 30 includes a case 36, a pressing portion 31 provided on the case 36 and operable to be pressed from above, and a first shaft portion 33 provided in a moving space S2 within the case 36, which moves together with the pressing portion 31 in the vertical direction when the pressing portion 31 is pressed. In the moving space S2, a permanent magnet M1 is fixed to either the case 36 side or the first shaft portion 33 side, and a magnetic body M2 is fixed to the other side, and the permanent magnet M1 and the magnetic body M2 are attracted to each other by a magnetic force along the vertical direction in an on state in which the pressing portion 31 protrudes upward from the case 36 more than in an off state. [Selected Figure] Figure 5

Description

The present invention relates to a switch device and an electronic device.

2. Description of the Related Art Conventionally, electronic devices such as electronic musical instruments have been proposed that include a switch device that can be turned on and off by pressing a pressing member. In this type of switch device, the pressing member protrudes and is held in either the on state or the off state, and the pressing member is retracted and held in the other state, either the on state or the off state. Those that perform the action are known. For example, Patent Document 1 discloses a power state confirmation device that includes a confirmation button, a stationary spring, an electromagnet, and a permanent magnet. In this power status confirmation device, when in the on state, the electromagnet and permanent magnet repel each other due to magnetic force, and the confirmation button is held in a state protruding from the surface of the device, and when in the off state, the confirmation button is biased by a stationary spring. It is held recessed from the surface of the equipment. Therefore, you can confirm whether the power is turned on or off just by touching the confirmation button.

Japanese Patent Application Publication No. 2000-243172

However, in the switch device as disclosed in Patent Document 1, due to the pressing operation of the pressing member, the shaft member connected to the pressing member may rattle or the backlash of the gear member provided in the mechanism for performing the alternate operation may occur. Shakiness may occur due to On the other hand, if the shaft member or gear member is pressurized from a predetermined direction in order to suppress such rattling, the frictional force caused by the pressurization makes it difficult for the pressing member to move smoothly, making it difficult for the pressing member to protrude or retract. It is difficult to suitably achieve this. This makes it difficult to improve the operational quality of the switch device.

An object of the present invention is to provide a switch device that can improve operational quality and an electronic device equipped with such a switch device.

The switch device of the present invention includes a case member, a button provided in the case member and operable by pressing from a first direction side, and a button provided in a space inside the case member, the button being provided in a space in the case member, and configured to move in an axial direction by pressing the button. a shaft that moves together with the button along the space, a magnet is fixed to one of the case member side and the shaft side, a magnetic body is fixed to the other, and The magnet and the magnetic body are attracted to each other by magnetic force along the axial direction in a first state in which the button protrudes from the case member in the first direction more than in the second state.

The electronic musical instrument of the present invention includes the above-mentioned switch device.

According to the present invention, it is possible to provide a switch device that can improve operational quality and an electronic device that includes such a switch device.

FIG. 1 is an overall perspective view of an electronic keyboard instrument according to an embodiment. FIG. 2 is a perspective view of the volume knob according to the embodiment, viewed diagonally from above. FIG. 2 is a perspective view of the volume knob according to the embodiment, viewed diagonally from the side. FIG. 3 is a vertical cross-sectional view of the volume knob in an off state according to the embodiment. FIG. 3 is a vertical cross-sectional view of the volume knob in an on state according to the embodiment. FIG. 3 is a view from above of the volume knob according to the embodiment. FIG. 2 is a perspective view showing only the pressing part, first shaft part, and case part of the volume knob according to the embodiment, in which (a) is a perspective view in an off state, and (b) is a perspective view in an on state. be.

Embodiments of the present invention will be described with reference to the drawings. An electronic keyboard instrument (electronic device such as an electronic musical instrument) 1 shown in FIG. 1 includes a keyboard section 10 having a plurality of keys such as white keys and black keys, and a case 20. A control board (not shown) and the like are housed inside the case 20. Note that in the following, the arrangement direction of the plurality of keys of the electronic keyboard instrument 1 is the left-right direction (the left case 26 side in FIG. 1 is the left direction), and the front-rear direction of each key is the front-rear direction (the operation panel section in FIG. 1 is the left direction). 6, the side where the keyboard section 10 is provided is defined as the front direction), and the vertical direction of the electronic keyboard instrument 1 is defined as the vertical direction (axial direction) (the upper surface side of the upper case 22 in FIG. (one direction)).

The case 20 has a generally rectangular shape that is oblong when viewed from above, with the left-right direction being the longitudinal direction of the entire keyboard, and includes an upper case 22, a lower case 24, a left case 26, and a right case 28. At least the upper case 22 is, for example, white or yellow and made of synthetic resin. For example, white colors include ivory color, beige color, bird's child color, chalk color, milky white, ecru color, snow white color (blue-white), etc., and the color of the case 20 is selected according to the design. The upper surface of the upper case 22 is an upper surface panel 20a containing an acrylic resin that is transparent to visible light.

The upper surface of the upper case 22 is provided with a power button 2 for turning on and off the power of the electronic keyboard instrument 1, a liquid crystal display section 4, and an operation panel section 6 in which a lighting area, touch switches, etc. are arranged. Further, a volume knob (switch device) 30 is provided between the power button 2 and the operation panel section 6 for controlling the volume of musical tones. On the top surface of the left case 26, there are provided a pitch bender 26a for applying and controlling pitch bends to musical tones, setting buttons 26b for various settings, and the like. An earphone jack 26c is provided on the front surface of the left case 26. The electronic keyboard instrument 1 includes a processor, and when the power is turned on and started, the processor controls the operation panel section 6 to light up.

The volume knob 30 is a press switch that performs a so-called alternate operation, and has a press part (button) 31 (see FIGS. 2 and 3). The volume knob 30 is capable of moving the pressing section 31 in either the up or down direction determined according to the positional state of the pressing section 31 in response to a user's pressing operation on the pressing section 31 . Specifically, in the initial state, the volume knob 30 is in a state in which the top surface of the pressing portion 31 (hereinafter referred to as the "pressing surface 31a") is located slightly below the top panel 20a (the state shown in FIG. 4). Hereinafter referred to as the "off state (second state)"), by pressing the pressing surface 31a downward, the pressing surface 31a is pushed back and protrudes upward from the top panel 20a (the state shown in FIG. 5). (hereinafter referred to as the "on state (first state)"). In the electronic keyboard instrument 1, the volume of musical tones can be controlled by pinching and rotating the pressing section 31 when the volume knob 30 is in the on state. Note that the pressing here is not necessarily limited to pressing downward, but may be a direction in which the pressing portion 31 can be pressed, such as a horizontal direction depending on the installation orientation of the volume knob 30. .

As shown in FIGS. 2 to 5, the volume knob 30 includes, in addition to the pressing part 31, a storage part (storage member) 32 in which the pressing part 31 is stored, and a shaft-shaped shaft connected to the lower side of the pressing part 31. A first shaft portion (shaft) 33, a shaft-shaped second shaft portion 34 connected to the lower side of the first shaft portion 33, a connecting portion 35 connecting the first shaft portion 33 and the second shaft portion 34, a connection A case part (case member) 36 that accommodates the part 35 in a vertically movable manner, a support plate 37 that supports the case part 36, and gears that constitute a mechanism for performing an alternate operation (hereinafter referred to as "alternate mechanism"). It has a mechanism section (holding mechanism) 38 in which a cam, a spring member, etc. are built-in. The volume knob 30 is attached inside the upper case 22 and connected to a control board inside the case 20 via wiring (not shown).

The pressing portion 31 has a substantially cylindrical shape and is sized so that its outer peripheral surface can be pinched by hand. The pressing portion 31 is rotatable in its circumferential direction. In other words, the pressing part 31 is rotatable around the axis of the first shaft part 33. The storage section 32 has a substantially cylindrical shape with an open top and a bottom, and is provided so as to surround the outer periphery of the pressing section 31 . Inside the storage section 32, a storage space S1 is provided in which the pressing section 31 is stored. The upper opening of the storage section 32 is a storage opening 32a. The opening surface of the storage opening 32a is provided so as to be located substantially on the same plane as the top panel 20a (see FIG. 4). A first through hole 32b penetrating in the vertical direction is provided in the lower part of the storage portion 32, and a part of the first shaft portion 33 is accommodated in the first through hole 32b. The storage section 32 is connected to the upper part of the case section 36 by screws.

The case portion 36 has a substantially cylindrical shape, and has a movement space (space) S2 provided therein. The left side of the movement space S2 is open and serves as a first opening 36a. Further, an opening is provided in a part of the right side portion of the movement space S2, and is defined as a second opening 36b. The first shaft portion 33 extends so that its axial direction coincides with the vertical direction, and its upper end portion is connected to the pressing portion 31 with a screw. The first shaft portion 33 extends downward from the center position of the pressing portion 31 and passes through the first through hole 32b, and a lower portion thereof is exposed in the movement space S2. Between the first shaft portion 33 and the first through hole 32b, there is a substantially cylindrical first bearing member 39a that is attached to the first through hole 32b and slidably supports the first shaft portion 33 in the vertical direction. It is provided. The first shaft portion 33 is provided with a cutout extending upward on its lower end side, and has a second lower surface 33b formed by the cutout and flat in the front-rear direction and the left-right direction.

The support plate 37 is a plate-shaped member that extends in the front-rear direction and the left-right direction, and supports the case portion 36 by being screwed and connected to the lower portion of the case portion 36 . The support plate 37 is provided with a circular through hole that penetrates in the vertical direction, and is also provided with a cylindrical protrusion 37b that protrudes upward at the periphery of the through hole. A second through hole 37a is provided in the inner wall of the protrusion 37b, and the second shaft portion 34 extending in the vertical direction is inserted into the second through hole 37a. The second shaft portion 34 extends so that its axial direction coincides with the vertical direction, and its lower end portion is connected to the alternate mechanism. The second shaft portion 34 passes through the second through hole 37a, and an upper portion thereof is exposed in the movement space S2. Between the second shaft portion 34 and the second through hole 37a, a substantially cylindrical second bearing member 39b is attached to the second through hole 37a and slidably supports the second shaft portion 34 in the vertical direction. It is provided. The second bearing member 39b is provided with a thread groove on its outer peripheral surface, and is fastened to the support plate 37 by a nut member N screwed into the thread groove.

The connecting portion 35 has a substantially prismatic shape, is provided within the movement space S2, and connects the first shaft portion 33 and the second shaft portion 34. Specifically, the lower end portion of the first shaft portion 33 is connected to the connecting portion 35 by a first screw 41 screwed into the upper portion of the connecting portion 35, and the upper end portion of the second shaft portion 34 is connected to the connecting portion 35. It is connected to the connecting portion 35 by a second screw 42 screwed into the lower portion of the connecting portion 35 . Thereby, the first shaft part 33 and the second shaft part 34 are vertically connected via the connecting part 35 so as to be located on the same axis. The first shaft portion 33, the second shaft portion 34, and the connecting portion 35, which are connected to each other, are movable in the vertical direction within the movement space S2 in response to a pressing operation on the pressing portion 31.

The mechanism section 38 has a vertically elongated substantially box-like shape, and the second shaft section 34 is connected to an alternate mechanism provided therein, thereby imparting an alternate movement in the vertical direction to the second shaft section 34. do. Therefore, the second shaft portion 34 is attached to the connecting portion 35, the first shaft portion 33 connected to the second shaft portion 34 via the connecting portion 35, and the pressing portion 31 connected to the first shaft portion 33. Alternate motion in the vertical direction is imparted through the shaft. That is, the pressing part 31, the first shaft part 33, the second shaft part 34, and the connecting part 35 move together on the same axis in the vertical direction in the alternate operation. A terminal board 38a is provided on the left side of the mechanism section 38. The terminal board 38a is connected to the mechanism section 38 via a plurality of terminal groups 38b protruding from the left side of the mechanism section 38.

Here, as shown in FIGS. 3 to 5, a position on the left side of the upper part of the case part 36 (in other words, an eccentric position of the upper part of the case part 36) and a position spaced apart from the first shaft part 33 One substantially cylindrical permanent magnet (magnet) M1 is fixed to. The permanent magnet M1 is arranged vertically so that its column axis direction coincides with the left-right direction. The lower part of the permanent magnet M1 is exposed in the moving space S2, and faces the plate surface of a plate-shaped magnetic body M2 made of iron or containing iron, which will be described below. Note that the magnetic strength of the permanent magnet M1 is not limited, and can be adjusted as appropriate depending on the attractive force to the magnetic body M2 brought about by the magnetic field generated by the permanent magnet M1. In this embodiment, the magnetic strength of the permanent magnet M1 is adjusted according to the rotational torque of the pressing part 31 which is rotatable around the axis of the first shaft part 33. Further, as a modification, a plurality of permanent magnets M1 may be provided in the case portion 36.

On the other hand, a substantially disc-shaped magnetic body M2 as a ferromagnetic body is fixed around the axis of a portion of the first shaft portion 33 located within the movement space S2. A first lower surface 33a as the lowest surface of the first shaft portion 33 and a second lower surface 33b located slightly higher than the first lower surface 33a are provided. If you look at it, it has the same circular shape as the circumference of the first shaft portion 33. The magnetic body M2 is provided with a hole penetrating in the vertical direction at a position substantially in the center thereof and corresponding to the first lower surface 33a of the first shaft portion 33. The magnetic body M2 is inserted from below the first lower surface 33a of the first shaft portion 33 through the hole, and a part of the upper surface of the magnetic body M2 comes into contact with the second lower surface 33b and defines the hole. The inner wall of the magnetic body M2 is in contact with the inner wall 33c of the first shaft portion 33 between the first lower surface 33a and the second lower surface 33b. In this state, the magnetic body M2 is fixed by being sandwiched between the second lower surface 33b of the first shaft portion 33 and the upper end portion 35a of the connecting portion 35 in the vertical direction.

The magnetic body M2 moves in the vertical direction together with the connecting part 35 within the movement space S2 in accordance with the alternate operation of the pressing part 31. An annular buffer sheet (buffer member) 50 is attached to the upper surface of the magnetic body M2 so that the permanent magnet M1 and the magnetic body M2 will not be damaged even if the permanent magnet M1 and the magnetic body M2 collide with each other with strong force. There is. Examples of the buffer sheet 50 include foamed sheets made of urethane or polyethylene. In the OFF state, the permanent magnet M1 and the magnetic body M2 are spaced apart from each other with a sufficient clearance CL1 so that no magnetic attraction is exerted between them (see FIG. 4).

As described above, in the volume knob 30, the permanent magnet M1 and the magnetic body M2 are attracted to each other by the magnetic force along the vertical direction in the on state in which the pressing part 31 protrudes upward from the case part 36 compared to the off state. . That is, the distance H1 (see FIG. 7(b)) between the case part 36 (the hatched part in FIG. 7) and the pressing part 31 in the on state is the same as the distance H1 between the case part 36 and the pressing part 31 in the off state. The pressing portion 31 protrudes upward from the case portion 36 by the difference between the two distances (H1−H2) than in the off state.

Further, FIG. 6 is a transparent view of the volume knob 30 viewed from above the electronic keyboard instrument 1 along the axial direction of the first shaft portion 33. As shown in FIG. 6, the first shaft part 33 is arranged so that the upper surface overlaps the circular center of the pressing part 31. The magnetic body M2 is provided so as to be located concentrically with respect to the pressing part 31 and the first shaft part 33, and the outer edge of the magnetic body M2 is inside the outer edge of the pressing part 31 and the first shaft part 33. It is located outside the outer edge of the portion 33 around its axis. The permanent magnet M1 is not provided all the way around the axis of the first shaft portion 33, but has a substantially rectangular shape when viewed from above.

No matter how the magnetic body M2 rotates relative to the permanent magnet M1, which is fixed without moving within the electronic keyboard instrument 1, the magnetic body M2 is rotated in the front-rear direction and in such a way that it always overlaps the permanent magnet M1 when viewed from above. It has a larger area than the permanent magnet M1 in the plane direction along the left-right direction. Since the permanent magnet M1 and the magnetic body M2 are provided inside the outer edge of the pressing section 31 when viewed from above, it is necessary to provide an attraction mechanism between the permanent magnet M1 and the magnetic body M2 outside the pressing section 31 when viewed from above. This allows the volume knob 30 to have a compact structure.

Next, the operation of the volume knob 30 will be explained with reference to FIGS. 4 and 5. In the volume knob 30, in the off state, the pressing part 31 is pushed below the opening surface of the storage opening 32a by the alternate mechanism, and a slight clearance CL2 is created between the pressing part 31 and the bottom surface of the storage opening 32a. The pressing portion 31 is held in a state in which it is provided (see FIG. 4). In the OFF state, the connecting portion 35 is located at the lower portion within the movement space S2. When the pressing portion 31 is pressed by the clearance CL2 in the OFF state, the connecting portion 35 moves upward in the movement space S2 and the pressing portion 31 is pushed back upward by the alternate mechanism, thereby turning on the ON state.

In the volume knob 30, when the pressing part 31 is pushed back upward in this way (transferring from the OFF state to the ON state), as the connecting part 35 moves upward in the moving space S2, the permanent magnet M1 and the magnetic As the bodies M2 approach each other, an attractive force acts between the permanent magnet M1 and the magnetic body M2 due to the magnetic force that causes the direction of the magnetic field along the axial direction of the first shaft portion 33 or the moving direction of the first shaft portion 33. . As a result, upward movement of the magnetic body M2, the connecting portion 35, the first shaft portion 33, and the second shaft portion 34 connected to the magnetic body M2 is accelerated. When the connecting portion 35 reaches the upper part of the moving space S2, the magnetic body M2 is attracted to the permanent magnet M1 and is turned on. At this time, since the magnetic body M2 is placed through the buffer sheet 50, the impact when the magnetic body M2 comes into contact with the permanent magnet M1 through the buffer sheet 50 is reduced.

In the on state, the pressing surface 31a is held in a state protruding upward from the top panel 20a by the alternate mechanism (see FIG. 5), and the magnetic body M2 and the permanent magnet M1 attract each other and become difficult to separate. There is. The magnetic body M2 is annularly provided around the axis of the first shaft portion 33, and in the state shown in FIG. 5, the magnetic body M2 rotates as the user rotates the protruding pressing portion 31. In this case, since the permanent magnet M1 is located on the upper surface side of the magnetic body M2, the permanent magnet M1 is always trying to attract the magnetic body M2, so that the magnetic body M2 is attracted to the permanent magnet M1. While the permanent magnet M1 slides on the magnetic body M2 (on the buffer sheet 50), the magnetic body M2, the first shaft portion 33, and the pressing portion 31 rotate.

Furthermore, since the permanent magnet M1 is not large enough to overlap the entire circumference of the magnetic body M2, the magnetic body M2 and the pressing portion 31 to which the magnetic body M2 is fixed are exposed to excessive attraction by the permanent magnet M1. It's not that I'm doing it. Therefore, in the ON state, the protruding pressing portion 31 can be pinched and rotated smoothly while suppressing rattling, and the volume of musical tones can be controlled. In the on state, the connecting portion 35 is located in the upper portion within the moving space S2. When the pressing portion 31 is pressed by the amount of protrusion from the top panel 20a in the ON state, the connecting portion 35 moves downward in the moving space S2, and the pressing portion 31 interferes with the bottom surface of the storage opening 32a. Then, the pressing portion 31 is pushed back upward slightly by the alternate mechanism to be in the OFF state.

In the volume knob 30, when the pressing portion 31 protruding upward in this way is pressed (transferred from the on state to the off state), the magnetic body M2 attracted to the permanent magnet M1 separates from the permanent magnet M1, The magnetic body M2 moves downward in the moving space S2 together with the connecting portion 35. Therefore, when performing a pressing operation from the on state, a force is required to resist the magnetic force and separate the magnetic body M2 from the permanent magnet M1, and resistance occurs at the moment of separation. When the magnetic body M2 is separated from the permanent magnet M1 and the connecting portion 35 reaches the lower part in the moving space S2 and is pushed back slightly, a sufficient clearance CL1 is provided between the permanent magnet M1 and the magnetic body M2. It is set to off state.

As explained above, the volume knob 30 according to the present embodiment includes the case part 36, the pressing part 31 provided in the case part 36 and operable by pressing, and the pressing part 31 provided in the moving space S2 in the case part 36, and The first shaft portion 33 moves along the vertical direction together with the pressing portion 31 when the pressing portion 31 is pressed. In the moving space S2, the permanent magnet M1 is fixed to either the case part 36 side or the first shaft part 33 side, and the magnetic body M2 is fixed to the other side, and the permanent magnet M1 and the magnetic body The bodies M2 are attracted to each other by magnetic force along the vertical direction in the on state in which the pressing portion 31 protrudes upward from the case portion 36 compared to the off state. Specifically, by moving the first shaft portion 33, they become separated in the off state, and become difficult to separate from each other by attracting the magnetic body M2 by magnetic force when switching from the off state to the on state and in the on state. or it becomes difficult to leave.

In the volume knob 30 configured as described above, in the on state, the magnetic body M2 provided on the first shaft portion 33 and the permanent magnet M1 provided on the case portion 36 are attracted so that they are difficult to separate from each other. As a result, displacement of the first shaft portion 33 with respect to the case portion 36 is suppressed, and rattling of the first shaft portion 33 and the pressing portion 31 connected to the first shaft portion 33 is suppressed. In this way, since the permanent magnet M1 and the magnetic body M2 are attracted to each other only in the ON state, the permanent magnet M1 and the magnetic body M2 do not affect the alternate operation of the volume knob 30. Furthermore, when transitioning from the OFF state to the ON state, even if there is a vertical positional shift with respect to the first shaft portion 33, the magnetic body M2 and the permanent magnet M1 are attracted to each other, so that the first shaft portion 33 is moved upwardly. It is possible to prevent the pressing portion 31 from protruding poorly due to insufficient movement. Therefore, it is possible to suitably realize protrusion and retraction (pushing) of the pressing portion 31, and the quality of operation of the volume knob 30 can be improved.

Furthermore, in the volume knob 30 described above, when the pressing part is pressed from the on state, the pressing part 31 and the first shaft part 33 move downward, and the magnetic body M2 is separated from the permanent magnet M1, so that the pressing part 31 is pressed. Resistance arises. Therefore, compared to a normal switch device that performs an alternate operation, the click feeling when pressing the pressing portion 31 from the on state can be enhanced.

Further, in the volume knob 30, a magnetic body M2 is provided in an annular shape around the axis of the first shaft portion 33. According to this configuration, when the pressing part 31 connected to the first shaft part 33 is rotated in the on state, the permanent magnet M1 slides on the magnetic body M2 while the magnetic body M2 is attracted to the permanent magnet M1. . Therefore, in the on state, the attraction between the permanent magnet M1 and the magnetic body M2 is maintained, so that the pressing part 31 can be rotated while suppressing rattling of the pressing part 31, and the volume knob 30 can be operated. Quality can be further improved.

Further, in the volume knob 30, the permanent magnet M1 is provided at an eccentric position around the axis of the first shaft portion 33. Therefore, in the ON state, when pressing the pressing surface 31a, it is easy to feel resistance at a position of the pressing surface 31a of the pressing section 31 that overlaps the permanent magnet M1 in the vertical direction, and At a position where the pressing surface 31a does not overlap, it is difficult to feel resistance when pressing the pressing surface 31a. In this way, the degree of resistance felt when pressing the pressing surface 31a can be changed depending on the position of the pressing surface 31a.

Further, in the volume knob 30, a plurality of permanent magnets M1 may be provided around the axis of the first shaft portion 33 as a modification. For example, a plurality of permanent magnets M1 may be provided in the upper portion of the case portion 36 around the axis of the first shaft portion 33 at predetermined intervals. In this case, since the plurality of permanent magnets M1 are attracted to substantially the entire surface of the plate surface of the magnetic body M2, the attractive force between the permanent magnets M1 and the magnetic body M2 can be increased. Further, the resistance felt when pressing the pressing surface 31a from the on state can be made uniform without depending on the position of the pressing surface 31a.

Further, in the volume knob 30, the permanent magnet M1 is provided at a position spaced apart from the circumference of the first shaft portion 33. If the volume knob 30 is not provided with the above-mentioned permanent magnet M1 and magnetic body M2, the longer the first shaft portion 33 protrudes upward in the on state, the more the pressing portion 31 becomes loose due to backlash. Tsuki becomes larger. As described above, by providing the permanent magnet M1 at a position separated from the circumference of the first shaft portion 33 by a certain distance or more, the permanent magnet M1 (case portion 36) and the magnetic body M2 (first shaft portion 33) are attracted to each other. By doing so, the effect of suppressing rattling can be enhanced.

Further, in the volume knob 30, a buffer sheet 50 is provided between the permanent magnet M1 and the magnetic body M2 (on the upper surface of the magnetic body M2), and the permanent magnet M1 and the magnetic body M2 are connected to each other via the buffer sheet 50 in the on state. Suction. This can reduce the impact when the magnetic body M2 is attracted to the permanent magnet M1 when transitioning from the off state to the on state, and when the magnetic body M2 is attracted to the permanent magnet M1 when transitioning from the on state to the off state. The resistance that occurs when separating from M1 can be reduced.

Further, in the volume knob 30, the pressing part 31 is rotatable around the axis of the first shaft part 33, and the magnet strength of the permanent magnet M1 is adjusted according to the rotational torque of the pressing part 31. Thereby, it is possible to provide an appropriate feeling when pinching and rotating the pressing portion 31 in the on state, and it is possible to further improve the quality of operation of the volume knob 30.

Furthermore, the electronic keyboard instrument 1 according to this embodiment includes a volume knob 30. Therefore, it is possible to realize the electronic keyboard instrument 1 in which the volume knob 30 can be pressed and rotated in such a manner that rattling and the like are suppressed and the operation quality is improved.

Note that the embodiments described above are presented as examples, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents. For example, in the above embodiment, the case part is provided with a permanent magnet and the first shaft part is provided with a magnetic body. However, the case part is provided with a magnetic body and the first shaft part is provided with a permanent magnet. A configuration may be provided. Further, a mechanism may be provided to detect the switching from the OFF state to the ON state and the ON state, and an electromagnet that generates magnetic force during the switching and the ON state may be provided instead of the permanent magnet. In this case, the magnetic body and the electromagnet attract each other during the switching and in the on state, but in the off state, since no magnetic force is generated, the magnetic body and the electromagnet do not attract each other. Further, in the embodiments described above, an electronic keyboard instrument is exemplified as an electronic device, but the present invention is not limited to this and can be applied to any electronic device as long as it is equipped with a hardware switch.

1 Electronic keyboard instrument 2 Power button 4 Liquid crystal display section 6 Operation panel section 10 Keyboard section 20 Case 20a Top panel 22 Upper case 24 Lower case 26 Left case 26a Pitch bender 26b Setting button 26c Earphone jack 28 Right case 30 Volume knob 31 Press section 31a Pressing surface 32 Storage section 32a Storage opening 32b First through hole 33 First shaft section 33a First lower surface 33b Second lower surface 33c Inner wall 34 Second shaft section 35 Connection section 35a Upper end section 36 Case section 37 Support plate 37a Second Through hole 37b Projection part 38 Mechanism part 38a Terminal board 38b Terminal group 39a First bearing member 39b Second bearing member 41 First screw 42 Second screw 50 Buffer sheets CL1, CL2 Clearance M1 Permanent magnet M2 Magnetic body N Nut member S1 Storage Space S2 Moving space

Claims (10)

a case member;
a button provided on the case member and operable by pressing from the first direction side;
a shaft that is provided in a space within the case member and moves together with the button along the axial direction when the button is pressed;
In the space, a magnet is fixed to either the case member side or the shaft side, and a magnetic body is fixed to the other one,
The magnet and the magnetic body are attracted to each other by magnetic force along the axial direction in a first state in which the button protrudes from the case member in the first direction more than in the second state.
Switch device. By repeatedly pressing the button, the first state and the second state in which the button is pressed from the first state and the magnet and the magnetic body are separated from each other are alternately switched. The switch device according to claim 1, comprising a holding mechanism. The switch device according to claim 1, wherein either the magnet or the magnetic body is provided in an annular shape around the axis of the shaft. The switch device according to claim 1, wherein the other of the magnet and the magnetic body is provided at an eccentric position around the shaft. The switch device according to claim 1, wherein a plurality of the other of the magnet and the magnetic body are provided around the axis of the shaft. The switch device according to claim 1, wherein the other of the magnet and the magnetic body is provided at a position spaced apart from around the shaft. The switch device according to claim 1, wherein the magnet and the magnetic body are both arranged at positions overlapping the button when viewed from above. A buffer member is provided between the magnet and the magnetic body,
the magnet and the magnetic body try to attract each other via the buffer member in the first state;
The switch device according to claim 1. The button is rotatable around the axis,
The magnetic strength of the magnet is adjusted according to the rotational torque of the button.
The switch device according to claim 1. A switch device according to any one of claims 1 to 8,
an electric circuit that is electrically controlled by the operation of the switch;
Electronic equipment equipped with

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