Rotation operation device and electronic keyboard instrument

Abstract

To provide a rotation operation device which is excellent in workability and productivity, and to provide an electronic keyboard instrument.SOLUTION: A rotation operation device according to one embodiment of the invention includes: a rotation detection part which detects rotation; a knob having an operation part which rotates in conjunction with the rotation detection part and an engagement part provided at the other side of the operation part and disposed at the inner diameter side relative to an outer edge of the operation part; and a housing part which includes an engaging part configured to engage with the engagement part and houses the rotation detection part.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a rotary operation device and an electronic keyboard instrument. [Background technology]

[0002] In a rotary operation device provided in various devices such as audio equipment, a configuration is known in which a detection unit having a rotary shaft and a part of a knob that fits onto the rotary shaft are housed within a case, and the operation part of the knob that is rotated by the user is located outside the case (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-59064 A Summary of the Invention [Problem to be solved by the invention]

[0004] In such a rotary operating device, in order to hold the knob in the case, in addition to the holding force provided by the engagement between the knob and the shaft, a flange is provided on the knob and holding members are arranged on the case side to clamp the flange from both sides in the axial direction, and the knob flange is clamped by the holding members on the front and back.

[0005] In such a configuration, the knob needs to be assembled before the front-side retaining member, and therefore subsequent processes such as assembly of other parts and transportation processing need to be carried out with the knob assembled and protruding outside the device, resulting in reduced workability and productivity.

[0006] An object of the present invention is to provide a rotary operation device and an electronic keyboard instrument that are excellent in workability and productivity. [Means for solving the problem]

[0007] A rotation operation device according to one embodiment of the present invention comprises a knob having a rotation detection unit that detects rotation, an operation unit that rotates in conjunction with the rotation detection unit, and a locking portion that is provided on the other side of the operation unit and positioned on the inner diameter side of the outer edge of the operation unit, and a storage unit that has an engagement portion that engages with the locking portion and houses the rotation detection unit. Effect of the Invention

[0008] According to the present invention, it is possible to provide a rotary operation device and an electronic keyboard instrument that are excellent in workability and productivity. [Brief description of the drawings]

[0009] [Figure 1] 1 is a perspective view showing the external configuration of an electronic keyboard instrument according to a first embodiment. [Diagram 2] FIG. 2 is a perspective view showing the external configuration of the rotary operation device according to the embodiment. [Diagram 3] FIG. 2 is a cross-sectional view showing the configuration of the rotation operation device. [Figure 4] FIG. 2 is a perspective view showing a configuration of a portion of the rotation operation device. [Diagram 5] FIG. 13 is an explanatory diagram showing a method of mounting the rotation operation device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] A rotary operation device 1 according to a first embodiment of the present invention will be described below with reference to Figs. 1 to 5. Fig. 1 is a perspective view of an electronic keyboard instrument 100 having the rotary operation device 1. Fig. 2 is a perspective view showing the external configuration of the rotary operation device 1. Fig. 3 is a cross-sectional view of the rotary operation device. Fig. 4 is a perspective view showing a partial configuration of the rotary operation device, with a portion of the storage section 30 omitted to show the internal structure. Fig. 5 is an explanatory diagram showing a method of mounting the rotary operation device. Note that in each figure, the configuration is shown generally by enlarging, reducing, or omitting as appropriate.

[0011] 1 to 4, the rotary operation device 1 includes a rotation detection unit 10 having a rotary shaft 12, a knob 20 that fits onto the rotary shaft 12 of the rotation detection unit 10, and a storage unit 30 that holds the rotation detection unit 10 and the knob 20. The rotary operation device 1 is a switch device that is rotated by a user, and is, for example, a volume switch provided in equipment such as an audio device. The rotary operation device 1 is provided in, for example, an electronic keyboard instrument 100, which is an example of an apparatus shown in Fig. 1. The electronic keyboard instrument 100 comprises a case 101, the rotary operation device 1, a keyboard 102, and a sound emitting unit 103. The case 101 houses the rotary operation device 1, the keyboard 102, and the sound emitting unit 103 on the rear side opposite the keyboard 102. In this embodiment, the rotary operation device 1 is disposed such that one end and the other end of the rotation shaft 12 face inward (rear side) and outward (front side) of the electronic keyboard instrument 100, respectively.

[0012] 2 to 4, the rotation detection unit 10 includes a detection module 11 and a rotation shaft 12 (shaft portion) protruding from the detection module 11. The rotation detection unit 10 detects rotation.

[0013] The detection module 11 includes various switch components such as switch elements and a substrate. The detection module 11 detects the rotation amount, rotation angle, and other rotational operations of the knob 20 via the rotating shaft 12, and performs angle control. The detection module 11 is held in the housing section 30 via a sleeve 13.

[0014] The rotating shaft 12 has a base end connected to the detection module 11 and a tip end engaged with the knob 20. The rotating shaft 12 is disposed so as to protrude from the detection module 11.

[0015] The tip of the rotating shaft 12 is formed into a D-cut shape with a cut portion 12a where a part of the outer circumferential surface is cut along the axial direction. The cut portion 12a has a flat portion intersecting the circumferential direction and regulates the relative rotational movement of the knob 20 and the rotating shaft 12 that are arranged opposite to each other. In other words, the cut portion 12a causes the rotating shaft 12 to rotate in conjunction with the rotational movement of the knob 20.

[0016] The base end side portion of the rotating shaft 12 is held by a bottom wall portion 35 of the housing portion 30, which will be described later, via a sleeve 13.

[0017] The knob 20 is provided at the end of the front side of the rotating shaft 12. A part of the knob 20 is disposed inside the housing portion 30, and a part of the knob 20 is exposed to the outside of the housing portion 30. The knob 20 integrally includes a disk-shaped operating portion 21, an outer cylinder portion 22 provided on the back side of the operating portion 21, and a cylindrical inner cylinder portion 23 provided on the radially inner side (inner diameter side) of the outer cylinder portion 22.

[0018] The operation unit 21 is configured in a disk shape provided on the tip side of the rotating shaft 12. The operation unit 21 is configured to have an outer diameter larger than the opening edge 31a of the storage unit 30, and covers the front side of the opening edge 31a. The operation unit 21 rotates in conjunction with the rotation detection unit 10. For example, at least one circular main surface and one side of the outer peripheral surface of the operation unit 21 are exposed to the outer surface of the electronic keyboard instrument 100 outside the storage unit 30, and become a so-called knob portion operated by the user. The operation unit 21 has a two-layer structure having a cover member 21a such as a decorative plate. Note that the operation unit 21 does not have to have the cover member 21a. The operation unit 21 has an outer edge portion larger than the opening edge 31a formed in the storage unit 30. Specifically, the outer diameter of the operation unit 21 is configured to be larger than the inner edge portion of the tapered opening edge 31a, and is preferably configured to be larger than the diameter of the outer edge portion of the tapered opening edge 31a. For example, the cover member 21a may have an opening where the opening edge 31a is disposed, and the outer diameter of the operation unit 21 may be configured to be larger than the boundary between the cover member 21a and the outer periphery of the opening edge 31a of the panel unit 31, and may be configured to cover the front side of the boundary. An indicator portion 21b that indicates the rotational position of the operation unit 21 is provided on the outer main surface of the operation unit 21.

[0019] The outer cylinder portion 22 is formed integrally with the operation portion 21. The outer cylinder portion 22 is inserted into the accommodation portion 30 and held therein.

[0020] The outer tube portion 22 is integrally provided with a reduced diameter portion 22e extending rearward from a portion of the rear surface of the operating portion 21, an engagement wall portion 22f extending further rearward from the reduced diameter portion 22e, and an annular locking portion 22b formed at the end of the engagement wall portion 22f.

[0021] The reduced diameter portion 22e is configured to be cylindrical, and its outer surface is configured to be tapered radially inward from the outer end edge of the operation portion 21. The tapered outer surface of the reduced diameter portion 22e is disposed opposite to the tapered opening edge 31a.

[0022] The engagement wall portion 22f is formed in a cylindrical shape extending from the reduced diameter portion 22e to the rear side. The engagement wall portion 22f is inserted into the inside of the case body 32 of the storage portion 30. The engagement wall portion 22f is formed with a thin wall by forming a circumferential groove portion 22a in which a part of the outer circumferential surface of the outer tube portion 22 is recessed radially inward. An end portion of a hook piece 33b described later is disposed in the circumferential groove portion 22a.

[0023] The locking portion 22b is configured in a flange shape that protrudes radially outward from the edge of the cylindrical engagement wall portion 22f. The outer diameter of the locking portion 22b is smaller than the outer edge of the operation portion 21, and is located radially inward from the outer edge of the operation portion 21. The ridge portion on the outer periphery of the locking portion 22b, which faces the electronic keyboard instrument 100, constitutes a guide portion 22d formed in a tapered shape that narrows in diameter on the inner side of the electronic keyboard instrument 100. The surface of the locking portion 22b on the outer side of the electronic keyboard instrument 100 forms a surface perpendicular to the axial direction, and constitutes a slip-out prevention portion 22g that restricts movement in the axial direction.

[0024] The end face on the tip side of the locking portion 22b forms a circular ring-shaped flat surface and has a protrusion 22c protruding in the axial direction. The protrusion 22c is formed, for example, in a semicircular cross section in order to reduce the contact area with the receiving surface 36 arranged opposite to it.

[0025] The inner cylinder portion 23 is formed integrally with the rear side of the operation portion 21 and extends rearward along the first direction. The inner cylinder portion 23 is configured in a cylindrical shape that is coaxial with the outer cylinder portion 22 and has a smaller diameter than the outer cylinder portion 22. The inner cylinder portion 23 is recessed outward from the electronic keyboard instrument 100 and has a fitting hole 23b (fitting portion) into which the tip end of the rotating shaft 12 is press-fitted.

[0026] The inner cylinder portion 23 has a step portion at a predetermined location in the middle of the fitting hole 23b, which faces a step surface at the end of the cut portion 12a of the rotating shaft 12 to position the rotating shaft 12 at a predetermined position.

[0027] In addition, reinforcing ribs or the like may be further formed in the space between the inner cylindrical portion 23 and the outer cylindrical portion 22.

[0028] The storage section 30 includes a flat panel section 31 and a holding member 33 configured separately from the panel section 31 and serving as an engagement section.

[0029] The panel section 31 is, for example, a part of a case 101 of an electronic keyboard instrument 100 to which it is to be attached. For example, the panel section 31 has, as a part thereof, a case body 32 having a peripheral wall section 34 and a bottom wall section 35. The panel section 31 may be configured as a single panel member, or it has a double structure having a cover member such as a decorative plate.

[0030] The peripheral wall portion 34 is configured in a cylindrical shape extending rearward from the panel portion 31. The peripheral wall portion 34 has an opening 34a in which the holding member 33 is disposed, at least in a part in the circumferential direction.

[0031] The bottom wall portion 35 is configured in a disk shape and is connected to the rear end of the peripheral wall portion 34. The bottom wall portion 35 is disposed opposite the rear end of the outer tube portion 22. The bottom wall portion 35 has a hole portion 35a in the center into which the rotating shaft 12 is inserted. The bottom wall portion 35 holds the rotation detection portion 10. The bottom wall portion 35 includes an annular receiving surface 36 that faces the convex portion 22c on the tip surface of the outer tube portion 22, and a sliding member 37 provided on the receiving surface 36. The sliding member 37 is a member that reduces friction, such as a Teflon (registered trademark) tape, and is attached to the receiving surface 36.

[0032] The case body 32 has a circular storage recess 30a with a bottom surrounded by a peripheral wall portion 34 and a bottom wall portion 35. An opening edge 31a of the storage recess 30a is configured to be equal to or smaller than the outer diameter of the knob 20. The inner peripheral surface of the opening edge 31a is configured to be tapered so that the diameter decreases on the back side.

[0033] The holding member 33 is disposed opposite at least a part of the outer periphery of the locking portion 22b of the outer cylinder portion 22, and configured to be able to engage with the locking portion 22b. The holding member 33 is disposed in an opening 34a formed in the peripheral wall portion 34, and integrally includes an arm 33a extending outward from the electronic keyboard instrument 100, and a hook piece 33b formed at the tip of the arm 33a and protruding radially inward.

[0034] The arm 33a has a spring property and is configured to be elastically deformable so that, for example, the hook piece 33b moves in the radial direction. The tip side and radially inner ridges of the hook piece 33b are configured to be tapered in the axial direction and form a second guide portion 33c that guides the insertion of the outer tube portion 22. The base end side of the hook piece 33b is configured in a flat shape perpendicular to the axial direction and forms a retaining portion 33d.

[0035] The retaining member 33 restricts the movement of the outer cylinder portion 22 in the removal direction by arranging the hook pieces 33b protruding inwardly on the front side of the locking portion 22b in the axial direction (outside the electronic keyboard instrument 100). For example, the retaining member 33 is configured as a separate member from the case body 32. As one example, the retaining member 33 is configured as a part of another member provided around the case body 32, and for example, the retaining member 33 can be formed by utilizing a peripheral member such as a power button or a member for fixing a board.

[0036] When assembling the rotary operation device 1 configured in this way, as shown in FIG. 5, the knob 20 is attached to the tip of the rotary shaft 12 from the device surface side in the accommodation recess 30a in which the rotation detection unit 10 is installed. At this time, the outer tube part 22 is inserted into the accommodation recess 30a, and the rotary shaft 12 is positioned to be inserted into the hole of the inner tube part 23, and the outer tube part 22 is pushed in the insertion direction. Then, the tapered guide part 22d and the second guide part 33c come into contact with each other and interfere with each other, so that a force in the insertion direction generates a force that causes the locking part 22b to push the hook piece 33b outward. Therefore, the locking part 22b deforms the arm 33a so that the hook piece 33b is displaced outward, and moves over the hook piece 33b toward the front of the insertion direction (inward of the electronic keyboard instrument 100). When the locking portion 22b reaches a mounting position ahead of the hook piece 33b in the insertion direction, the holding member 33 returns to its original position, and the hook piece 33b is positioned at a stop position behind the locking portion 22b in the insertion direction.

[0037] The rotary operation device 1 and electronic keyboard instrument 100 configured as described above can form a fall-off prevention mechanism that engages the locking portion 22b and the hook piece 33b at an engagement position equal to or smaller than the outer diameter of the operation portion 21. This allows the knob 20 to be inserted after the storage portion 30 and the rotation detection portion 10 are assembled, i.e., after assembly. This reduces the risk of damaging the knob 20 and improves workability, as compared to pre-assembly, for example. In addition, it is possible to ensure the appearance and stability of the prevention of fall-off.

[0038] Furthermore, a high degree of slip-off prevention effect can be obtained by fitting the locking portion 22b into the holding member 33. Therefore, it is easier to ensure the attachment property than, for example, by increasing the fitting force of the shaft.

[0039] Furthermore, according to the rotary operation device 1 of this embodiment, the diameter of the opening edge 31a of the accommodating recess 30a is set equal to or smaller than the outer diameter of the knob 20, so that the accommodating recess 30a can be covered with the knob 20. Therefore, even if the positional accuracy of the knob 20 relative to the accommodating recess 30a is somewhat deviated, the external appearance is not impaired.

[0040] Furthermore, by forming the tip surface of the outer tube portion 22 into a circular ring shape and providing a receiving surface 36 facing the position ahead of the hook piece 33b in the insertion direction, it is possible to suppress the inclination of the knob 20 during operation. Therefore, it is possible to reduce the backlash of the knob 20 and improve the anti-dislodgement performance. In addition, by forming a convex portion 22c having a curved outer surface on the end surface of the outer tube portion 22, the contact area is reduced and frictional resistance is reduced, making the rotation operation smoother.

[0041] In addition, in the rotary operation device 1 according to the above embodiment, the bottom wall portion 35 supporting the rotary shaft 12 and the peripheral wall portion 34 supporting the outer periphery of the outer tube portion 22 are integrally formed from the same member, which makes it easier to ensure the positional accuracy of the two support portions and improves the holding performance. For example, positional accuracy is easier to ensure compared to a structure in which holding members are arranged on the front and back sides of the flange portion as separate members and sandwiched between them.

[0042] Furthermore, by making the retaining member 33, which has a spring property to prevent it from falling out, a separate part from the case body 32, it is possible to achieve both the deformability of the hook piece 33 and the positional accuracy of the case body 32, thereby realizing a configuration that is easy to insert and difficult to fall out.

[0043] The above-described embodiments are merely examples and do not limit the scope of the invention.

[0044] For example, the rotary operation device 1 may be configured to be insertable and removable so that the knob 20 can be removed by following a predetermined procedure. As an example, in the rotary operation device 1, when the rotation position of the knob 20 is set to full volume or a position rotated further in the direction of increasing the volume, a gap is formed that allows the knob 20 to be tilted with respect to the rotary shaft 12. That is, by setting the rotation position of the knob 20 at a predetermined position, the cut portion 12a is set to a position facing the hook piece 33b or a predetermined position on the opposite side to the hook piece 33b, and a predetermined amount of gap is secured between the cut portion 12a and the opposing surface of the knob 20. The dimension of this gap may be set to a dimension that allows the knob 20 to be tilted with respect to the rotary shaft 12, so that the locking portion 22b can be disengaged in the removal direction.

[0045] In addition, for example, in the above embodiment, the cover member 21a is provided on the surface of the operation unit 21, but they may be integrated together. In addition, the front side of the panel unit 31 is covered with a decorative plate, but the panel unit 31 may not have a decorative plate.

[0046] Furthermore, the equipment in which the rotary operation device 1 is provided is not limited to audio equipment, but may be applicable to various types of equipment having a switch device that is rotary operated.

[0047] Although several embodiments of the present invention have been described, the present invention is encompassed within the scope of the inventions described in the claims and their equivalents. The inventions described in the original claims of this application are listed below. [Note] [1] A rotation detection unit that detects rotation; a knob including an operating portion that rotates in conjunction with the rotation detection portion and a locking portion that is provided on the other side of the operating portion and disposed radially inward relative to an outer edge of the operating portion; a housing portion including an engagement portion that engages with the locking portion and that houses the rotation detection portion; A rotation operation device comprising: [2] The rotation detector has a rotation axis, The rotary operation device according to the present invention, wherein the operation unit has a fitting portion that fits onto the rotary shaft. the housing portion includes a case body integrally including a bottom wall having a hole into which the shaft portion is inserted and a peripheral wall disposed on an outer periphery of the knob, The rotary operation device described in [2], wherein the engagement portion is formed separately from the case body. [4] The rotary operating device described in [3], wherein the engagement portion has a hook piece configured to be elastically deformable by interfering with the locking portion when the knob is inserted into the accommodating portion. [5] The rotary operating device described in [3], wherein the engaging portion has a convex portion that protrudes toward the bottom wall at a position facing the bottom wall of the case body. [6] [1] A rotation operation device as described above; The keyboard and A sound output section; a case that accommodates the rotary operation device, the keyboard, and the sound output unit; An electronic keyboard instrument comprising: [Explanation of symbols]

[0048] 1...Rotation operation device 10...Rotation detector 11…Detection module 12...Rotation axis 12a…Cut section 13...Sleeve 20…Knob 21...Operation part (engaging part) 21a...Cover member 21b…Indicator part 22…Outer cylinder part 22b...Locking part 22c…Convex part 22d…Information department 22e…Reduced diameter part 22f...Engagement wall part 23…Inner cylinder 23b…Fitting hole (fitting part) 30…Storage section 30a...accommodating recess 31…Panel section 31a…Opening edge 32…Case body 33...Holding part 33a…Arm 33b…Hook piece 33c…Information department 34...Peripheral wall part 34a…Aperture 35…Bottom wall 35a...hole 36…Receiving surface 100...Electronic keyboard instruments (equipment) 101…Case 102…Keyboard 103...Sound emitting part

Claims

1. A rotation detection unit having a rotation shaft and detecting rotation; Knob and A housing portion that houses the rotation detection portion, the knob has an operating portion that rotates in conjunction with the rotation detection portion, and a locking portion that is disposed radially inward relative to an outer edge of the operating portion, The housing portion includes an engagement portion that engages with the locking portion, the locking portion has an inclined surface facing a direction in which the knob is inserted into the rotation shaft, The engaging portion has an inclined surface corresponding to the locking portion. Rotation control device.

2. A rotary operating device as described in Claim 1, wherein the accommodating portion comprises a case body having a bottom wall having a hole into which the rotating shaft is inserted, and a peripheral wall arranged on the outer periphery of the knob.

3. A rotational operating device as described in Claim 2, wherein the engagement portion is formed separately from the case body.

4. The rotary operation device according to claim 1 , wherein the engagement portion has a hook piece configured to be elastically deformable by interfering with the locking portion when the knob is inserted into the housing portion.

5. The housing portion includes a case body having a bottom wall having a hole into which the rotating shaft is inserted and a peripheral wall disposed on an outer periphery of the knob, The rotary operation device according to claim 1 , wherein the engaging portion has a protrusion that protrudes toward the bottom wall at a position facing the bottom wall of the case body.

6. The knob has an outer tube portion provided on the back side of the operating portion and an inner tube portion provided radially inward of the outer tube portion, The outer cylinder portion includes a reduced diameter portion extending rearward from a part of a rear surface of the operation portion, and an engagement wall portion extending further rearward from the reduced diameter portion, The rotary operating device according to claim 1 , wherein the locking portion is formed at an end of the engagement wall portion.

7. The knob has an outer tube portion provided on the back side of the operating portion and an inner tube portion provided radially inward of the outer tube portion, The outer cylinder portion includes a reduced diameter portion extending rearward from a part of a rear surface of the operation portion, and an engagement wall portion extending further rearward from the reduced diameter portion, The rotary operating device according to claim 1 , wherein the reduced diameter portion is cylindrical, and an outer surface of the reduced diameter portion is tapered radially inwardly from an outer edge of the operating portion.

8. The rotary operation device according to claim 1 , The keyboard and A sound output section; a case that accommodates the rotary operation device, the keyboard, and the sound output unit; An electronic keyboard instrument comprising:

Images