CN117707282A - Switching device and electronic apparatus - Google Patents

Abstract

The application provides a switching device and an electronic device. The switching device is provided with: a housing having a first face; a button provided on the first surface side and capable of being pressed; and a shaft provided in a space in the housing, the shaft being moved together with the button in an axial direction by a pressing operation of the button, a magnet being fixed to one of the housing side and the shaft side in the space, and a magnetic body being fixed to the other of the housing side and the shaft side, the magnet and the magnetic body being attracted to each other by a magnetic force in the axial direction in a first state in which the button protrudes from the first surface.

Description

Switching device and electronic apparatus

Technical Field

The present invention relates to a switching device and an electronic apparatus.

Background

Conventionally, electronic devices such as electronic musical instruments have been proposed which include a switching device that is switched on and off by a pressing operation of a pressing member. Among such switching devices, there is known a switching device that performs a so-called alternate operation, in which a pressing member protrudes and is held in one of an on state and an off state, and in which the pressing member is retracted and is held in the other of the on state and the off state. For example, japanese patent application laid-open No. 2000-243172 discloses a power supply state confirmation device having a confirmation button, a stationary spring, an electromagnet, and a permanent magnet. In this power state confirmation device, in the on state, the electromagnet and the permanent magnet rebound by the magnetic force, and the confirmation button is held in a state protruding from the surface of the device, whereas in the off state, the confirmation button is biased by the stationary spring, and is held in a state retracted from the surface of the device. Therefore, the on/off of the power supply can be confirmed by merely touching the confirmation button.

Disclosure of Invention

Problems to be solved by the invention

However, in the switch device disclosed in the above-mentioned japanese patent application laid-open No. 2000-243172, with the pressing operation of the pressing member, a backlash may occur due to backlash of a gear member provided in a mechanism for performing the backlash or the alternate motion of a shaft member connected to the pressing member. On the other hand, if the shaft member or the gear member is pressurized from a predetermined direction in order to suppress such rattling, it is difficult for the pressing member to smoothly move due to friction caused by the pressurization, and it is difficult to appropriately achieve the protrusion or retraction of the pressing member. Therefore, it is difficult to improve the operation quality of the switching device.

One of the advantages of the present disclosure is to provide a switching device capable of improving operation quality, and an electronic apparatus including the switching device.

Means for solving the problems

The switching device of the present disclosure includes: a housing having a first face; a button provided on the first surface side and capable of being pressed; and a shaft provided in a space in the housing, the shaft being moved together with the button in an axial direction by a pressing operation of the button, a magnet being fixed to one of the housing side and the shaft side in the space, and a magnetic body being fixed to the other of the housing side and the shaft side, the magnet and the magnetic body being attracted to each other by a magnetic force in the axial direction in a first state in which the button protrudes from the first surface.

The electronic musical instrument of the present disclosure is provided with the above-described switching device.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, a switching device capable of improving operation quality and an electronic apparatus including the switching device can be provided.

Drawings

Fig. 1 is an overall perspective view of an electronic keyboard instrument of the embodiment.

Fig. 2 is a perspective view of the volume knob according to the embodiment as viewed from obliquely above.

Fig. 3 is a perspective view of the volume knob of the embodiment viewed from the oblique side.

Fig. 4 is a longitudinal sectional view of the volume knob according to the embodiment in a closed state.

Fig. 5 is a longitudinal sectional view of the volume knob according to the embodiment in an open state.

Fig. 6 is a view of the volume knob according to the embodiment as viewed from above.

Fig. 7A and 7B are perspective views showing only a pressing portion of a volume knob, a first shaft portion, and a housing according to an embodiment, wherein fig. 7A is a perspective view of a closed state, and fig. 7B is a perspective view of an open state.

Detailed Description

Embodiments of the present invention will be described with reference to the accompanying drawings. An electronic keyboard instrument (electronic equipment 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 casing 20. A control board or the like, not shown, is housed in the case 20. Hereinafter, the arrangement direction of the plurality of keys of the electronic keyboard instrument 1 will be described as the left-right direction (the left case 26 side in fig. 1 will be referred to as the left direction), the front-rear direction of each key will be referred to as the front direction (the side where the keyboard section 10 is provided with respect to the operation panel section 6 in fig. 1 will be referred to as the front direction), and the up-down direction of the electronic keyboard instrument 1 will be referred to as the up-down direction (the upper surface side of the upper case 22 in fig. 1 will be referred to as the up-down direction).

The housing 20 has a substantially rectangular shape in a lateral direction with respect to a longitudinal direction of the entire keyboard as viewed from above, and includes an upper housing 22, a lower housing 24, a left housing 26, and a right housing 28. At least the upper case 22 is made of synthetic resin, for example, white or yellow. For example, white is ivory, beige, egg-white (Japanese: , white), hu Fense, white (Japanese) white, snow white (blue-white), etc., and the case 20 is selected according to the design. The upper surface (first surface) of the upper case 22 is an upper surface panel 20a including an acrylic resin having a transmissivity to visible light.

A power button 2 for turning on and off the power of the electronic keyboard instrument 1, a liquid crystal display portion 4, and an operation panel portion 6 provided with a lighting area, a touch switch, and the like are provided on the upper surface of the upper case 22. Further, a volume knob (switching device) 30 is provided between the power button 2 and the operation panel section 6, and the volume knob 30 is used for electrically controlling the volume of musical tones to an electric circuit such as an amplifier for generating musical tones. A bending machine 26a for controlling bending of musical sound, setting buttons 26b for various settings, and the like are provided on the upper surface of the left casing 26. An earphone hole 26c is provided at the front surface of the left housing 26. The electronic keyboard instrument 1 includes a processor, and when the power is turned on and the electronic keyboard instrument is started, the processor controls the operation panel section 6 to be turned on.

The volume knob 30 is a push switch that performs so-called alternate operation, and has a push portion (button) 31 (see fig. 2 and 3). The volume knob 30 can move the pressing portion 31 in either one of the up-down directions determined in accordance with the position state of the pressing portion 31 in accordance with the pressing operation of the pressing portion 31 by the user. Specifically, in the initial state, the volume knob 30 is held in a state in which the upper surface of the pressing portion 31 (hereinafter referred to as "pressing surface 31 a") is located slightly below the upper surface panel 20a (a state shown in fig. 4, hereinafter referred to as "closed state (second state)") and is held in a state in which the pressing surface 31a is pressed downward and the pressing surface 31a is pushed back to protrude upward from the upper surface panel 20a (a state shown in fig. 5, hereinafter referred to as "open state (first state)"). In the electronic keyboard instrument 1, the volume of musical sound can be controlled electrically by pinching the pressing portion 31 to rotate when the volume knob 30 is in the on state. The pressing is not necessarily limited to the downward pressing, and may be a direction in which the pressing portion 31 can be pressed, a lateral direction corresponding to the installation direction of the volume knob 30, or the like.

As shown in fig. 2 to 5, the volume knob 30 includes, in addition to the pressing portion 31: the housing portion (housing member) 32 housing the pressing portion 31, a shaft-shaped first shaft portion (shaft) 33 connected to the lower side of the pressing portion 31, 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 housing portion 36 capable of housing the connecting portion 35 so as to be movable up and down, a support plate 37 supporting the housing portion 36, and a mechanism portion (holding mechanism) 38, the mechanism portion 38 incorporating gears, cams, spring members, and the like constituting a mechanism for performing an alternate operation (hereinafter referred to as an "alternate mechanism"). The volume knob 30 is mounted in the upper case 22 and connected to a control board in the case 20 through wiring not shown.

The pressing portion 31 has a substantially cylindrical shape and is sized to be pinched by a hand. The pressing portion 31 is rotatable in the circumferential direction thereof. In other words, the pressing portion 31 is rotatable about the axis of the first shaft portion 33. The storage portion 32 is formed in a substantially cylindrical shape with a bottom and opened upward, and is provided so as to surround the outer periphery of the pressing portion 31. A storage space S1 for storing the pressing portion 31 is provided inside the storage portion 32. The upper opening of the housing portion 32 is a housing opening portion 32a. The opening surface of the storage opening 32a is provided on substantially the same surface as the upper surface panel 20a (see fig. 4). A first through hole 32b penetrating in the vertical direction is provided at a lower portion of the housing portion 32, and a part of the first shaft portion 33 is housed in the first through hole 32 b. The housing portion 32 is connected to an upper portion of the case portion 36 by screw fastening.

The housing 36 has a substantially cylindrical shape, and a movement space (space) S2 is provided therein. The left side of the movement space S2 is opened to become a first opening 36a. In addition, an opening is provided in a part of the right side portion of the movement space S2, and becomes a second opening 36b. The first shaft 33 extends so that the axial direction coincides with the vertical direction, and the upper end portion thereof is connected to the pressing portion 31 by screw fastening. The first shaft 33 extends downward from the center of the pressing portion 31 and penetrates the first through hole 32b, and the lower portion thereof is exposed to the movement space S2. A substantially cylindrical first bearing member 39a is provided between the first shaft portion 33 and the first through hole 32b, and the first bearing member 39a is attached to the first through hole 32b to pivotally support the first shaft portion 33 so as to be slidable in the up-down direction. The first shaft portion 33 has a defect portion extending upward at a lower end portion side thereof, and has a second lower surface 33b formed by the defect portion and flat in the front-rear direction and the left-right direction.

The support plate 37 is a plate-like member that expands in the front-rear direction and the left-right direction, and is screw-fastened to the lower portion of the housing 36 to support the housing 36. The support plate 37 is provided with a circular through hole penetrating in the vertical direction, and a cylindrical projection 37b projecting upward is provided at the periphery of the through hole. The second through hole 37a is provided in the inner wall of the protruding portion 37b, and the second shaft portion 34 extending in the vertical direction is inserted into the second through hole 37 a. The second shaft portion 34 extends so that the axial direction coincides with the up-down direction, and the lower end portion thereof is connected to the alternating mechanism. The second shaft portion 34 penetrates the second through hole 37a, and an upper portion thereof is exposed in the movement space S2. A substantially cylindrical second bearing member 39b is provided between the second shaft portion 34 and the second through hole 37a, and the second bearing member 39b is attached to the second through hole 37a so as to pivotally support the second shaft portion 34 in the up-down direction. The second bearing member 39b is provided with a screw groove on its outer peripheral surface, and is fastened to the support plate 37 by a nut member N screwed into the screw groove.

The connection portion 35 is substantially prismatic, is provided in 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 to 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 by a second screw 42 screwed to the lower portion of the connecting portion 35. Thus, the first shaft portion 33 and the second shaft portion 34 are vertically connected via the connection portion 35 so as to be positioned on the same shaft. The first shaft 33, the second shaft 34, and the connecting portion 35 connected to each other are movable in the vertical direction in the movement space S2 in response to the pressing operation of the pressing portion 31.

The mechanism portion 38 has a substantially box shape in a longitudinal direction, and by connecting the second shaft portion 34 to an alternate mechanism provided therein, an alternate action in the up-down direction is imparted to the second shaft portion 34. Accordingly, the second shaft portion 34 applies an alternating motion in the up-down direction to the connection portion 35, the first shaft portion 33 connected to the second shaft portion 34 via the connection portion 35, and the pressing portion 31 connected to the first shaft portion 33. That is, the pressing portion 31, the first shaft portion 33, the second shaft portion 34, and the connecting portion 35 move together in the vertical direction on the same axis in an alternating operation. A terminal board 38a is provided on the left side of the mechanism 38. The terminal substrate 38a is connected to the mechanism portion 38 via a plurality of terminal groups 38b protruding from the left side of the mechanism portion 38.

As shown in fig. 3 to 5, one permanent magnet (magnet) M1 having a substantially cylindrical shape is fixed to a position on the left side of the upper portion of the housing 36 (in other words, to an eccentric position of the upper portion of the housing 36) and is separated from the first shaft portion 33. The permanent magnets M1 are arranged longitudinally such that the column axis direction thereof coincides with the left-right direction. The lower portion of the permanent magnet M1 is exposed in the moving space S2, and faces a plate surface of an iron or iron-containing plate-like magnetic body M2 described later. The magnet strength of the permanent magnet M1 is not limited, and the attraction force of the magnetic body M2 can be appropriately adjusted according to the magnetic field generated by the permanent magnet M1. In the present embodiment, the magnet strength of the permanent magnet M1 is adjusted according to the rotational torque of the pressing portion 31 rotatable about the axis of the first shaft portion 33. As a modification, a plurality of permanent magnets M1 may be provided in the case 36.

On the other hand, a substantially disk-shaped magnetic body M2 as a ferromagnetic body is fixed around the axis of the portion of the first shaft portion 33 located in the movement space S2. A first lower surface 33a as the lowermost surface of the first shaft portion 33 and a second lower surface 33b located at a position slightly higher than the first lower surface 33a are provided, and when the outer edge of the first lower surface 33a and the outer edge of the second lower surface 33b are viewed from below, a circular shape equivalent to an axis around the first shaft portion 33 is formed. A hole penetrating in the vertical direction is provided in the magnetic body M2 at a substantially central position thereof and at a position corresponding to the first lower surface 33a of the first shaft portion 33. The magnetic body M2 is inserted from the lower side of the first lower surface 33a of the first shaft portion 33 through the hole, a portion of the upper surface of the magnetic body M2 is in contact with the second lower surface 33b, and the inner wall of the magnetic body M2 defining the hole is in contact with the inner wall 33c between the first lower surface 33a and the second lower surface 33b of the first shaft portion 33. 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 up-down direction. The magnetic body M2 moves in the vertical direction together with the connection portion 35 in the movement space S2 in accordance with the alternate operation of the pressing portion 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 are not damaged even if the permanent magnet M1 and the magnetic body M2 collide with each other with a strong force. The cushion sheet 50 is a foam sheet made of polyurethane or polyethylene. In the closed state, the permanent magnet M1 and the magnetic body M2 are separated from each other with a gap CL1 (see fig. 4), and the gap CL1 is a gap sufficient to prevent the attractive force of the magnetic force from acting therebetween.

As described above, in the volume knob 30, the permanent magnet M1 and the magnetic body M2 are attracted to each other in the vertical direction by the magnetic force in the open state, in which the pressing portion 31 protrudes upward from the housing portion 36 than in the closed state. That is, the distance H1 between the housing portion 36 (hatched portion in fig. 7A, 7B) and the pressing portion 31 in the open state (see fig. 7B) is larger than the distance H2 between the housing portion 36 and the pressing portion 31 in the closed state (see fig. 7A). Therefore, in the open state, the distances (H1-H2) by which the pressing portions 31 protrude upward from the housing portion 36 differ more than in the closed state.

Further, fig. 6 is a perspective view of the volume knob 30 as viewed from above the electronic keyboard instrument 1 along the axial direction of the first shaft portion 33. The first shaft portion 33 is arranged such that the upper surface overlaps the position of the center of the circle with respect to the circular pressing portion 31. The magnetic body M2 is disposed concentrically with respect to the pressing portion 31 and the first shaft portion 33, and the outer edge of the magnetic body M2 is located inside the outer edge of the pressing portion 31 and outside the outer edge around the axis of the first shaft portion 33. The outer edge of the buffer sheet 50 is located inside the outer edge of the magnetic body M2. The permanent magnet M1 is not provided over the entire circumference around the axis of the first shaft 33, but has a substantially rectangular shape in plan view. The magnetic body M2 always has a larger area than the permanent magnet M1 in the surface direction along the front-rear direction and the left-right direction so as to overlap the permanent magnet M1 when viewed from above, regardless of the rotation of the permanent magnet M1 fixed in the electronic keyboard instrument 1. Since the permanent magnet M1 and the magnetic body M2 are provided inside the outer edge of the pressing portion 31 in a plan view, the suction mechanism does not need to be provided outside the pressing portion 31 in a plan view, and thus a compact structure can be formed.

Next, the operation of the volume knob 30 will be described with reference to fig. 4 and 5. In the volume knob 30, in the closed state, the pressing portion 31 is pressed by the alternate mechanism to a position below the opening surface of the housing opening 32a, and the pressing portion 31 is held in a state where the minute gap CL2 is provided between the pressing portion 31 and the opening bottom surface of the housing opening 32a (see fig. 4). In the closed state, the connection portion 35 is located at a lower portion within the movement space S2. In the closed state, when the pressing portion 31 is pressed by the amount corresponding to the clearance CL2, the connecting portion 35 is moved upward in the movement space S2 by the alternate mechanism, and the pressing portion 31 is pushed back upward, thereby turning into the open state.

In the volume knob 30, when the pressing portion 31 is pushed back upward in this way (when the state is changed from the closed state to the open state), the permanent magnet M1 and the magnetic body M2 approach each other as the connecting portion 35 moves upward in the movement space S2, and an attractive force between the permanent magnet M1 and the magnetic body M2 due to a magnetic force generated in the axial direction of the first shaft portion 33 or the direction of the magnetic field in the movement direction of the first shaft portion 33 acts. Thereby, the upward movement of the magnetic body M2 and the connection portion 35, the first shaft portion 33, and the second shaft portion 34 connected to the magnetic body M2 is accelerated. When the connection portion 35 reaches the upper portion in the movement 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 held by the buffer sheet 50, the impact when the magnetic body M2 is brought into contact with the permanent magnet M1 by the buffer sheet 50 is reduced.

In the open state, the pressing surface 31a is held in a state protruding upward from the upper surface panel 20a by the alternate mechanism (see fig. 5), and the magnetic body M2 and the permanent magnet M1 are attracted to each other, so that they are hardly separated. The magnetic body M2 is provided in a ring shape around the axis of the first shaft 33, and in the state of fig. 5, the magnetic body M2 rotates in response to a user's rotation operation of 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 magnetic body M2 is always attracted, and therefore, in a state where the magnetic body M2 is attracted to the permanent magnet M1, the magnetic body M2, the first shaft portion 33, and the pressing portion 31 rotate while the permanent magnet M1 slides on the magnetic body M2 (on the buffer sheet 50). Further, since the permanent magnet M1 is not overlapped so much over the entire circumferential area of the magnetic body M2, the magnetic body M2 and the pressing portion 31 to which the magnetic body M2 is fixed are not excessively attracted by the permanent magnet M1. Therefore, the protruding pressing portion 31 can be pinched in the open state to suppress rattling, and simultaneously can be smoothly rotated, so that the volume of musical sound can be controlled. In the open state, the connection portion 35 is located at an upper portion within the movement space S2. When the pressing portion 31 is pressed by an amount corresponding to the protruding amount from the upper surface panel 20a in the opened state, the connecting portion 35 moves downward in the movement space S2, and the pressing portion 31 interferes with the opening bottom surface of the accommodating opening portion 32a. Then, the pressing portion 31 is slightly pushed back upward by the alternate mechanism, and the closed state is achieved.

In the volume knob 30, when the pressing portion 31 protruding upward is pressed in this manner (when the state is changed from the on state to the off state), the magnetic body M2 attracted by the permanent magnet M1 is separated from the permanent magnet M1, and the magnetic body M2 moves downward in the movement space S2 together with the connecting portion 35. Therefore, when the pressing operation is performed from the open state, a force for separating the magnetic body M2 from the permanent magnet M1 against the magnetic force is required, and a resistance force is generated at the moment of separation. When the magnetic body M2 is separated from the permanent magnet M1, the connection portion 35 reaches the lower portion in the movement space S2 and is pushed back slightly, the closed state is set in which a sufficient gap CL1 is provided between the permanent magnet M1 and the magnetic body M2.

As described above, the volume knob 30 of the present embodiment includes: a pressing portion 31 capable of pressing operation; a first shaft portion 33 connected to the pressing portion 31 and moved in the up-down direction together with the pressing portion 31 by a pressing operation of the pressing portion 31; a housing portion 36 provided with a movement space S2 in which the first shaft portion 33 moves in the up-down direction; and a mechanism 38 that alternately switches between a closed state in which the pressing portion 31 is pressed downward and held, and an open state in which the pressing portion 31 protrudes upward and is held, in accordance with a pressing operation of the pressing portion 31. In the movement space S2, the permanent magnet M1 is provided in the housing portion 36, and the magnetic body M2 is provided in the first shaft portion 33, and the permanent magnet M1 and the magnetic body M2 are separated in the closed state by the movement of the first shaft portion 33, and the magnetic body M2 is attracted by a magnetic force when switching from the closed state to the open state and in the open state, whereby the separation from each other becomes difficult or difficult.

In the volume knob 30 configured as described above, in the open state, the magnetic body M2 provided on the first shaft portion 33 and the permanent magnet M1 provided on the housing portion 36 are attracted to each other so as to be hardly separated from each other, thereby suppressing positional displacement of the first shaft portion 33 with respect to the housing portion 36, and suppressing rattling of the first shaft portion 33 and the pressing portion 31 connected to the first shaft portion 33. In this way, since the permanent magnet M1 and the magnetic body M2 are attracted only in the on state, the alternating operation of the volume knob 30 is not affected by the permanent magnet M1 and the magnetic body M2. Even when the first shaft portion 33 is displaced in the vertical direction at the time of transition from the closed state to the open state, the magnetic body M2 and the permanent magnet M1 can attract each other, and the first shaft portion 33 cannot be moved sufficiently upward, so that the pressing portion 31 is prevented from protruding. Therefore, the pressing portion 31 can be appropriately protruded or retracted (pushed in), and the operation quality of the volume knob 30 can be improved.

In the volume knob 30 described above, when the pressing portion is pressed from the open state, the pressing portion 31 and the first shaft portion 33 move downward, and the magnetic body M2 separates from the permanent magnet M1, thereby generating resistance in the pressing portion 31. Therefore, the click feeling when the pressing portion 31 is pressed from the on state can be improved as compared with a normal switching device that performs the alternate operation.

In the volume knob 30, the magnetic body M2 is provided in a ring shape around the axis of the first shaft 33. According to this configuration, when the pressing portion 31 connected to the first shaft portion 33 is rotated in the open state, the permanent magnet M1 slides on the magnetic body M2 in a state where the magnetic body M2 is attracted to the permanent magnet M1. Therefore, in the open state, by maintaining the attraction between the permanent magnet M1 and the magnetic body M2, the pressing portion 31 can be rotated while suppressing the rattling of the pressing portion 31, and the operation quality of the volume knob 30 can be further improved.

In the volume knob 30, the permanent magnet M1 is disposed at an eccentric position around the axis of the first shaft 33. Therefore, in the open state, resistance is easily perceived when pressing the pressing surface 31a at a position overlapping the permanent magnet M1 in the up-down direction in the pressing surface 31a of the pressing portion 31, and resistance is hardly perceived when pressing the pressing surface 31a at a position not overlapping the permanent magnet M1 in the up-down direction in the pressing surface 31 a. In this way, the degree of resistance felt when pressing the pressing surface 31a can be changed according to the position of the pressing surface 31 a.

In the volume knob 30, as a modification, a plurality of permanent magnets M1 may be provided around the axis of the first shaft 33. For example, the plurality of permanent magnets M1 may be provided at predetermined intervals around the axis of the first shaft 33 in the upper portion of the housing 36. 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 attraction force between the permanent magnets M1 and the magnetic body M2 can be improved. In addition, the resistance felt when the pressing surface 31a is pressed from the open state can be made uniform without being different depending on the position of the pressing surface 31 a.

In the volume knob 30, the permanent magnet M1 is provided at a position separated from the axis of the first shaft 33. If the volume knob 30 is not provided with the permanent magnet M1 and the magnetic body M2, the larger the length of the first shaft portion 33 protruding upward in the closed state, the larger the rattling of the pressing portion 31 due to backlash. As described above, by providing the permanent magnet M1 at a position separated from the axis of the first shaft portion 33 by a distance equal to or greater than a certain extent, the effect of suppressing the vibration caused by the attraction between the permanent magnet M1 (the housing portion 36) and the magnetic body M2 (the first shaft portion 33) can be improved.

In the volume knob 30, a buffer sheet 50 is provided between the permanent magnet M1 and the magnetic body M2 (the upper surface of the magnetic body M2), and the permanent magnet M1 and the magnetic body M2 are attracted to each other through the buffer sheet 50 in the on state. In this way, the impact when the magnetic body M2 is attracted to the permanent magnet M1 can be reduced when the state is changed from the off state to the on state, and the resistance generated when the magnetic body M2 is separated from the permanent magnet M1 can be reduced when the state is changed from the on state to the off state.

In the volume knob 30, the pressing portion 31 is rotatable about the axis of the first shaft portion 33, and the permanent magnet M1 adjusts the magnet strength according to the rotational torque of the pressing portion 31. In this way, in the open state, the tactile sensation felt when the pressing portion 31 is pinched and rotated can be made appropriate, and the operation quality of the volume knob 30 can be further improved.

The electronic keyboard instrument 1 of the present embodiment includes a volume knob 30. Accordingly, the electronic keyboard instrument 1 can be realized in which the volume knob 30 having improved operation quality by suppressing rattling or the like is pressed and rotated.

The embodiments described above are presented by way of example, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other modes, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the scope of the claims and their equivalents. For example, in the above-described embodiment, the case portion is provided with the permanent magnet and the first shaft portion is provided with the magnetic material, but the case portion may be provided with the magnetic material and the first shaft portion may be provided with the permanent magnet. In addition, a mechanism may be provided to detect the switching to the off state or the on state and the on state, and an electromagnet may be provided in place of the permanent magnet to generate a magnetic force in the switching and the on state. In this case, the magnetic body and the electromagnet attract each other in the switching and on states, but in the off state, since no magnetic force is generated, the magnetic body and the electromagnet do not attract each other. In the above embodiment, the electronic keyboard instrument is exemplified as the electronic device, but the present invention is not limited to this, and the present invention can be applied to any electronic device as long as the electronic device is provided with a hardware switch.

Claims (10)

1. A switching device is provided with:

a housing having a first face;

a button provided on the first surface side and capable of being pressed; and

a shaft provided in a space in the housing and moved together with the button in an axial direction by a pressing operation of the button,

in the space, a magnet is fixed to one of the housing side and the shaft side, and a magnetic body is fixed to the other of the housing side and the shaft side,

in a first state in which the button protrudes from the first surface, the magnet and the magnetic body are attracted to each other by a magnetic force in the axial direction.

2. The switching device according to claim 1, wherein,

the magnetic device is provided with a holding mechanism which alternately switches the first state and the second state by repeating the pressing operation of the button, wherein the second state is a state in which the button is pressed from the first state and the magnet and the magnetic body are separated from each other.

3. The switching device according to claim 1, wherein,

one of the magnet and the magnetic body is provided in a ring shape around the axis of the shaft.

4. The switching device according to claim 1, wherein,

the other of the magnet and the magnetic body is disposed at an eccentric position around the axis of the shaft.

5. The switching device according to claim 1, wherein,

the other of the magnet and the magnetic body is provided in plurality around the axis of the shaft.

6. The switching device according to claim 1, wherein,

the other of the magnet and the magnetic body is provided at a position separated from the axis of the shaft.

7. The switching device according to claim 1, wherein,

the magnet and the magnetic body are disposed at positions overlapping the push button in a plan view.

8. The switching device according to claim 1, wherein,

a buffer member is provided between the magnet and the magnetic body,

the magnet and the magnetic body are attracted to each other through the buffer member in the first state.

9. The switching device according to claim 1, wherein,

the button is rotatable about the axis of the shaft,

the magnet adjusts the strength of the magnet according to the rotational torque of the button.

10. An electronic device, comprising:

the switching device of any one of claims 1 to 8; and

an electrical circuit electrically controlled by operation of the switching device.