Rotation operation device and electronic device

Abstract

To provide a magnetic rotary operation device that excels in dust-proof and drip-proof performance.SOLUTION: A rotary operation device (20) comprises: a rotary operation member (200); a base member (240); a magnet (210), a plurality of magnetic poles of which are alternately magnetized, with the direction of magnetization being parallel to a prescribed shaft, and which rotates around the prescribed shaft together with the rotation of the rotary operation member; a housing (10) for holding a first magnetic substance (220) and a second magnetic substance (230) respectively arranged so as to sandwich the magnet, facing the magnetized surfaces of the magnet, and the base member; and a detection part (140) for detecting a change of a magnetic field due to the rotation of the magnet. It is possible to generate an operation force in accordance with the positional change of magnetic polarity, a first tooth part (221) of the first magnetic substance and a second tooth part (231) of the second magnetic substance due to the rotation of the magnet. The magnet and the first and second magnetic substances are accommodated in the inside of the housing, with the detection part located at a position that does not overlap the magnet as seen from the thrust direction of the magnet.SELECTED DRAWING: Figure 3

Description

[Technical field]

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

[0002] In general, imaging devices such as digital cameras, which are one type of electronic device, are provided with a rotary operation device such as a dial for setting shooting conditions and selecting various functions. Patent Document 1 discloses a rotary operation device that includes a disk-shaped permanent magnet that is magnetized with alternating S and N poles, and a magnetic body that has multiple comb teeth formed radially, and that generates an operating force using a magnetic force during a rotary operation. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-87672 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the rotary operation device disclosed in Patent Document 1 has insufficient dustproof and drip-proof performance because the magnet and magnetic body are exposed to the outside. In particular, when the magnet is exposed to the outside, it is easy for iron sand and the like to collect, and if a large amount of iron sand and the like adheres, it may impair operability.

[0005] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide a magnetic rotary operation device and electronic device that are excellent in dust-proof and drip-proof performance. [Means for solving the problem]

[0006] a ring-shaped magnet having a plurality of alternately magnetized magnetic poles, the direction of the magnetization being parallel to the predetermined axis, and rotating about the predetermined axis as the rotation of the rotation operating member rotates; a first magnetic body and a second magnetic body arranged to face the magnetized surface of the magnet and sandwich the magnet; a housing for holding the base member; and a detection unit for detecting a change in a magnetic field due to the rotation of the magnet, wherein the first magnetic body has a first tooth portion and the second magnetic body has a second tooth portion, and an operating force can be generated in response to a change in the position of the magnetic pole and the first tooth portion and the second tooth portion due to the rotation of the magnet, the magnet, the first magnetic body, and the second magnetic body are stored inside the housing, and the detection unit is arranged in a position that does not overlap with the magnet when viewed from the thrust direction of the magnet.

[0007] Other objects and features of the present invention are illustrated in the following examples. Effect of the Invention

[0008] According to the present invention, it is possible to provide a magnetic rotary operation device and electronic device that are excellent in dust-proof and drip-proof performance. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of an imaging device according to a first embodiment. [Diagram 2] 1 is a block diagram of an imaging device according to a first embodiment. [Diagram 3] 2A and 2B are a perspective view and a cross-sectional view of a dial unit according to the first embodiment. [Figure 4] FIG. 2 is a perspective view of a main part of a dial unit according to the first embodiment. [Diagram 5] 4 is a diagram showing the positional relationship between a magnet and a detection unit in the first embodiment. FIG. [Figure 6] 4 is a diagram showing the arrangement relationship between a magnetic body, a magnet, and a detection unit in the first embodiment. FIG. [Figure 7] 5A to 5C are explanatory diagrams of clockwise rotation detection in the first embodiment. [Figure 8] 6A to 6C are explanatory diagrams of counterclockwise rotation detection in the first embodiment. [Figure 9] FIG. 4 is a diagram showing an arrangement of a detection unit in the first embodiment. [Figure 10] 13 is a diagram showing the arrangement relationship between a magnetic body, a magnet, and a detection unit in a second embodiment. FIG. [Figure 11] 13 is a diagram showing the positional relationship between a magnet and a detection unit in a second embodiment. FIG. [Figure 12] 13A and 13B are explanatory diagrams of clockwise rotation detection in the second embodiment. [Figure 13] 13A and 13B are explanatory diagrams of counterclockwise rotation detection in the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Note that in the following description, an imaging device, which is one type of electronic device, will be taken as an example, but the electronic device is not limited to an imaging device, and the present invention can be applied to various electronic devices equipped with a rotation operation device.

[0011] [First embodiment] First, an imaging device (electronic device) 100 according to a first embodiment of the present invention will be described with reference to Fig. 1(a), (b) and Fig. 2. Fig. 1(a) is a perspective view of the imaging device 100 as viewed from the front side, and Fig. 1(b) is a perspective view of the imaging device 100 as viewed from the rear side. Figs. 1(a) and (b) show a state in which a lens device (interchangeable lens) that can be attached to the imaging device 100 has been removed.

[0012] The imaging device 100 is, for example, a digital camera (camera) that captures an image of a subject to obtain an image. A shutter button 30, a main dial (rotary operation member) 200, and a mode switching dial 40 are arranged on the top surface of the imaging device 100. The shutter button 30 is an operation unit for issuing shooting instructions, and the mode switching dial 40 is an operation unit for switching between various shooting modes. In addition, a power switch 50 is arranged on the top surface of the imaging device 100. The power switch 50 is used to turn the power of the imaging device 100 on or off.

[0013] The main dial 200 can be operated on a plane substantially parallel to a rotation axis (a predetermined axis). A part of the main dial 200 is exposed so that the main dial 200 protrudes in the direction of the rotation radius from the housing 10 around the main dial 200, so that the plane substantially parallel to the rotation axis can be easily operated. The main dial 200 is a rotary operation member that can be rotated clockwise and counterclockwise. By rotating the main dial 200, various setting values ​​such as the shutter speed and the aperture can be changed as described later.

[0014] An image display unit 70 and a SET button 60 are arranged on the back of the imaging device 100. The image display unit 70 uses a TFT liquid crystal or an organic EL, and displays various setting screens and images obtained by shooting. The SET button 60 is a push button, and is mainly used when deciding a selection item, etc.

[0015] FIG. 2 is a block diagram of the imaging device 100. In FIG. 2, the same components as those shown in FIG. 1 are denoted by the same reference numerals. The imaging device 100 is provided with a ROM 101, which is a non-volatile memory, and a program that runs on the CPU 130 is stored in the ROM 101. In this embodiment, the ROM 101 is a Flash-ROM, but is not limited to this, and may be another non-volatile memory. The RAM 102, which is a volatile memory, is used as an image buffer that temporarily records an image obtained by shooting. The RAM 102 is also used when temporarily storing image data obtained as a result of image processing. The RAM 102 is also used as a work memory for the CPU 130. Note that, if the access speed is sufficient, a memory other than the RAM may be used.

[0016] The power supply unit 105 includes a primary or secondary battery, an AC adapter, or the like, and supplies power to each unit of the imaging device 100 directly or via a DC-DC converter (not shown), or the like. The power switch 50 has, for example, mechanically on and off positions. The power switch 50 may be, for example, a push switch or an electrical switch. When the power switch 50 is in an off state, the imaging device 100 does not function and is maintained in a low power consumption state even if various power sources such as batteries are inserted in the power supply unit 105. When the power switch 50 is on with various power sources inserted in the power supply unit 105, the imaging device 100 functions as a camera.

[0017] The CPU (control unit) 130 comprehensively controls the imaging device 100. The CPU 130 also performs a predetermined process in response to the rotation of a magnet 210, which will be described later. For example, the CPU 130 changes various settings such as the shutter speed and the aperture in response to the operation of the main dial 200 detected by the detection unit 140, which will be described later, and further changes the display of the image display unit 70. The CPU 130 has a timer 131 and a counter 132. At least one of the timer 131 and the counter 132 may be externally attached to the CPU 130. The timer 131 starts and ends the time measurement in response to an instruction from the CPU 130. The timer 131 may be operated continuously to periodically generate an interrupt to the CPU 130 at a predetermined time interval. The counter 132 counts the number of times the main dial 200 is operated. In addition to counting the number of times the main dial 200 is operated, the counter 132 may also count the number of times other operating units are operated.

[0018] The detection unit 140 has a first magnetic field detection unit 141 and a second magnetic field detection unit 142, and detects a change in the magnetic field (magnetic flux density) caused by the rotation of the magnet 210. The detection unit 140 has, for example, a Hall IC sensor or an MR sensor. An upper threshold and a lower threshold are set for each of the first magnetic field detection unit 141 and the second magnetic field detection unit 142. When the magnetic flux density (magnetic field) exceeds the upper threshold or falls below the lower threshold, the first magnetic field detection unit 141 and the second magnetic field detection unit 142 output a detection signal. The CPU 130 can read out the detection signal detected by the first magnetic field detection unit 141 or the second magnetic field detection unit 142 at a predetermined timing.

[0019] The magnet 210 is a ring-shaped permanent magnet, and is magnetized in the axial direction of the central axis with S poles and N poles alternately arranged at a predetermined pitch along its circumference (outer periphery). The magnet 210 is attached rotatably integrally with the main dial 200, and rotates in conjunction with the rotation of the main dial 200. When the magnet 210 rotates, the detection unit 140 detects a change in the magnetic flux density (magnetic field) of the magnet 210, and the CPU 130 determines the direction and amount of rotation of the main dial 200 according to the detection result. The main dial 200, the magnet 210, and the detection unit 140 constitute the dial unit (rotation operation device) 20.

[0020] Next, the configuration of the dial unit 20 in this embodiment will be described with reference to Figures 3(a), (b) and 4. Figure 3(a) is a perspective view of the dial unit 20 as viewed from the upper rear surface, and Figure 3(b) is a cross-sectional view of the dial unit 20. Figure 4 is a perspective view of the main parts of the dial unit 20, showing an enlarged perspective view of the dial unit 20 in a state in which the magnet 210, the magnet holding member 250 and the second magnetic body 230 are not displayed.

[0021] 3(a) and (b), the dial unit 20 is mainly composed of a main dial 200, a magnet 210 that rotates integrally with the main dial 200, and a first magnetic body 220 and a second magnetic body 230 for generating a rotational operating force. The main dial 200 is composed of an operation section 201 operated by a user and a rotating shaft section 202 that serves as a rotation shaft when rotating. The rotating shaft section 202 of the main dial 200 is rotatably supported by a bearing section 241 of a base member 240.

[0022] The magnet 210 is attached to the main dial 200 at a position facing the base member 240 via a magnet holding member 250 fixed to the tip of the rotating shaft portion 202 with an adhesive or the like. In this embodiment, the rotating shaft portion 202 is formed on the main dial 200 side, but this is not limiting and the rotating shaft portion 202 may be formed on the magnet holding member 250 side. In addition, the method of fixing the magnet 210 to the magnet holding member 250 can be appropriately selected from methods such as fixing with an adhesive, insert molding, etc.

[0023] In addition, the first magnetic body 220 and the second magnetic body 230, which are magnetic bodies, are arranged on both sides of the magnet 210 in the rotation axis direction so as to sandwich the magnet 210. That is, the first magnetic body 220 and the second magnetic body 230 are arranged facing the magnetized surface of the magnet 210 so as to sandwich the magnet 210. Since the magnet 210 and the first magnetic body 220 and the second magnetic body 230 are likely to wear out if they come into direct contact with each other when the magnet 210 rotates, a gap is provided by a spacer (the configuration details will be described later) to actively prevent contact. Although not shown in FIGS. 3(a) and (b), the shape of the first magnetic body 220 is the same as that of the second magnetic body 230. In this embodiment, the magnet 210, the first magnetic body 220, and the second magnetic body 230 are stored inside the housing 10. In this embodiment, the magnet 210, the first magnetic body 220, and the second magnetic body 230 are arranged on the opposite side of the main dial 200 with respect to the base member 240.

[0024] As described above, the magnet 210 is a ring-shaped permanent magnet, and S and N poles are alternately magnetized along its circumference (outer periphery) in a direction parallel to the axial direction of the rotating shaft at a predetermined pitch. The first magnetic body 220 and the second magnetic body 230 are respectively formed with a first comb tooth portion (first tooth portion) 221 (not shown, same shape as 231) and a second comb tooth portion (second tooth portion) 231 that extend radially (outer periphery) from the center at the same number and pitch as the number of poles of the magnet 210. An operating force (magnetic operating force) is generated in the main dial 200 according to the change in the positional relationship between the multiple magnetic poles and the first comb tooth portion 221 and the second comb tooth portion 231 that face each magnetic pole.

[0025] Further, a pair of arms 222 (232) (partially not shown) extending outward are provided at a part of the outer circumferential tip of the first comb tooth portion 221 and the second comb tooth portion 231 at a substantially opposing position with the shaft center sandwiched therebetween. A screw fastening part is provided at the end of each arm 222 (232), and the arm 222 (232) is fastened together with the base member 240 to the cover member 280 by a screw with a spacer member 260 (270) interposed between the magnetic bodies. In this embodiment, as described above, the first magnetic body 220 and the second magnetic body 230 are common parts, but commonization is preferable because it reduces deviation due to part tolerance, making it easier to stabilize the operating force and reducing manufacturing costs. Moreover, the shape and fixing method of each magnetic body are not limited to the above-mentioned configuration, and other methods may be used. Modified examples will be described later.

[0026] The detection unit 140 is mounted on a substrate and disposed at a desired position. As described above, the detection unit 140 detects changes in the magnetic flux density (magnetic field) of the magnet 210, and the CPU 130 determines the direction and amount of rotation of the main dial 200 based on the detection result.

[0027] 3(b), the dial unit 20 is attached to the housing 10 from the inside so that a portion of the main dial 200 is exposed to the outside from an opening 11 provided in the housing 10. The housing 10, the base member 240, and the cover member 280 are close to each other in a square shape near the opening 11 with a gap A all around. Gap A is set as narrow as possible to make it difficult for water or dust to get into the main body of the imaging device 100 through this gap.

[0028] Further, at the back of gap A, a square-shaped gap is provided all around gap B in order to install sealing member 290 to prevent water and dust from entering the interior through gap A. It is preferable to use a material for sealing member 290 that is slightly thicker than gap B and less permeable to moisture.

[0029] In this embodiment, the larger the diameter and the thicker the thickness of the magnet 210, the first magnetic body 220, and the second magnetic body 230, the more the operating force of the main dial 200 can be increased. In order to increase the diameter, this can be achieved to some extent by providing a bulge portion 12 in the housing 10, but the outer diameter of the bulge portion needs to be smaller than the outer diameter of the operating unit 201 so as not to impair the operability of the main dial 200, and so there is a limit to the size. On the other hand, in order to increase the thickness, there is also a limit to the thickness because the installation space is limited along with the recent miniaturization of the main body of the imaging device 100.

[0030] In this embodiment, in order to prevent an increase in the thickness of the dial unit 20, the magnet 210, the first magnetic body 220, and the second magnetic body 230 are arranged close to the main dial 200. At this time, in order for the seal member 290 to exhibit sufficient dust-proof and drip-proof performance, it is preferable that the width is at least about 1.0 mm. However, if the attachment surface of the seal member 290 is to be formed only by the base member 240, the first magnetic body 220 must be moved slightly away from the main dial 200.

[0031] 4, part of the attachment surface of the seal member 290 is formed by the base member 240, and the rest is formed by a plurality of extensions 242 extending from the base member 240 toward the first magnetic body 220 between the outer circumferential surface of the first comb teeth portion 221 and the first comb teeth portion 221. With this configuration, it is possible to position the first magnetic body 220 closer to the main dial 200, and it is possible to provide dustproof and drip-proof performance while preventing the size from becoming large.

[0032] In addition, in this embodiment, since the first magnetic body 220 and the second magnetic body 230 are arranged to sandwich the magnet 210 as described above, most of the magnetic flux generated from the magnet 210 flows into each magnetic body, and there is almost no leakage of the magnetic flux outside the outer shape of the magnet 210. As a result, even though the magnet 210 is installed near the exterior part of the casing 10, there is almost no magnetic field effect on the exterior of the main body of the imaging device 100, and iron sand and the like are not attracted.

[0033] According to this embodiment, it is possible to provide a magnetic rotary operation device and electronic device that are excellent in dust-proof and drip-proof performance while suppressing the thickness of the dial unit 20.

[0034] Next, the configuration of rotation detection in this embodiment will be described with reference to Fig. 5(a) to (d). The imaging device 100 can detect the direction and amount of rotation by detecting a plurality of magnetic fields whose magnetic flux density changes with the rotation of the operating member. Fig. 5(a) to (d) are diagrams showing the positional relationship between the magnet 210 and the detection unit 140. Here, only the magnet 210 and the detection unit 140 are shown and described as representative.

[0035] FIG. 5(a) shows the positional relationship between the magnet 210 and the detection unit 140. The magnet 210 rotates around a rotation axis 650. The axial direction of the rotation axis 650 is called the thrust direction, the direction spreading radially around the rotation axis 650 is called the radial direction, and the direction rotating clockwise or counterclockwise around the rotation axis 650 is called the circumferential direction. In FIG. 5(a), the detection unit 140 is in a rotation phase facing the N pole of the magnet 210 on the thrust direction projection plane. An arrow 601 represents a magnetic field from the magnet 210 toward the detection unit 140. Here, for ease of explanation, only the magnetic field related to the detection unit 140 is illustrated.

[0036] Fig. 5(b) is a cross-sectional view taken along line 602-602 in Fig. 5(a). Since magnet 210 is magnetized in the thrust direction, the magnetic field emitted from the N pole passes through detection unit 140 as indicated by arrow 603 and travels toward the S pole. Therefore, detection unit 140 detects the magnetic flux density of arrow 603.

[0037] Fig. 5(c) shows a state in which magnet 210 has rotated from Fig. 5(a) by 30 degrees, the equivalent of one pole, around rotation axis 650. On the thrust direction projection plane, detection unit 140 is in a rotational phase facing the S pole of magnet 210. Arrow 604 represents the magnetic field from detection unit 140 toward magnet 210. For ease of explanation, only the magnetic field related to detection unit 140 is illustrated here.

[0038] Fig. 5(d) is a cross-sectional view taken along line 605-605 in Fig. 5(c). Since magnet 210 is magnetized in the thrust direction, the magnetic field emitted from the N pole passes through detection unit 140 as indicated by arrow 606 and travels toward the S pole. Therefore, detection unit 140 detects the magnetic flux density of arrow 606.

[0039] 5(a) and (c), on the thrust direction projection plane (when viewed from the thrust direction of magnet 210), detection unit 140 is disposed at a position that does not overlap with magnet 210. Detection unit 140 detects the magnetic flux density that changes with the rotation of magnet 210, and detects the direction and amount of rotation of magnet 210. Details of the detection method will be described later with reference to FIG. 7.

[0040] Next, the positional relationship between the magnetic body, the magnet, and the detection unit will be described with reference to Figs. 6(a) and (b). Figs. 6(a) and (b) are diagrams showing the positional relationship between the magnetic body, the magnet, and the detection unit. Here, only the magnetic body, the magnet, and the detection unit will be shown and described as a representative example. In Figs. 6(a) and (b), the first magnetic field detection unit 141 described with reference to Fig. 2 corresponds to the first magnetic field detection unit 641, and the second magnetic field detection unit 142 corresponds to the second magnetic field detection unit 642, respectively.

[0041] FIG. 6(a) is a diagram showing the relationship between the magnetic body, the magnet, and the detection unit in the case of the thrust direction. FIG. 6(b) is a diagram showing the case of the case of the FIG. 6(a) seen from the direction of the arrow 610. The first magnetic body 220 and the second magnetic body 230 each have comb teeth portions for the number of polarizations. The first comb teeth portion 221 of the first magnetic body 220 and the second comb teeth portion 231 of the second magnetic body 230 are collectively referred to as the magnetic body comb teeth portion 663. In addition, the valley between the magnetic body comb teeth portion 663 is referred to as the magnetic body valley portion (valley portion) 664. When no force is applied to the main dial 200 (not shown) and the magnet 210 is stationary, as shown in FIG. 6(a), the magnetic body comb teeth portion 663 faces each pole of the magnet 210 in the thrust direction. This is due to the balance of the magnetic forces between the magnet 210 and the first magnetic body 220 and the second magnetic body 230. The main dial 200 is operated by a user, and the magnet 210 rotates around the rotation axis 650. At this time, as described above, an operating force is generated according to the change in the positions of the magnet 210, the first magnetic body 220, and the second magnetic body 230, and the user feels a sense of operation.

[0042] The detection unit 140 has a first magnetic field detection unit 641 and a second magnetic field detection unit 642. The first magnetic field detection unit 641 is disposed on an extension of the radial direction of the magnetic comb tooth portion 663 when viewed from the thrust direction (on a thrust direction projection surface). The second magnetic field detection unit 642 is disposed on an extension of the radial direction of the magnetic valley portion 664 when viewed from the thrust direction (on a thrust direction projection surface). For this reason, the first magnetic field detection unit 641 and the second magnetic field detection unit 642 can detect a change in magnetic flux density at different phases. By detecting a change in magnetic flux density due to the rotation of the magnet 210 at different phases, it becomes possible to detect the direction of rotation and the amount of rotation. Details of the detection method will be described later with reference to FIG. 7.

[0043] As shown in FIG. 6(b), the first magnetic field detection unit 641 and the second magnetic field detection unit 642 are disposed in the magnetic gap 611 between the second magnetic body 230 and the first magnetic body 220. Since the magnetic field is drawn into the first magnetic body 220 and the second magnetic body 230, if the first magnetic field detection unit 641 and the second magnetic field detection unit 642 are disposed outside the magnetic gap 611 in the thrust direction, the change in magnetic flux density required for rotation detection cannot be captured. By disposing the first magnetic field detection unit 641 and the second magnetic field detection unit 642 in the magnetic gap 611, the change in magnetic flux density required for rotation detection can be captured. In addition, since the magnetic flux density in the thrust direction is highest at the center between the magnetic bodies, it is preferable that the first magnetic field detection unit 641 and the second magnetic field detection unit 642 are disposed on the center line 612 between the magnetic bodies.

[0044] Also, when viewed from the thrust direction, the magnetic comb teeth 663 facing the first magnetic field detection unit 641 has a length equal to or less than the outer diameter 613 of the magnet 210. That is, when viewed from the thrust direction, the tips of the first comb teeth and the second comb teeth are disposed at a position closer to the rotation axis 650 than the outer diameter 613 of the magnet 210 (or at the same position). When the magnetic comb teeth 663 facing the first magnetic field detection unit 641 protrudes beyond the outer diameter 613 of the magnet 210, the magnetic field emitted from the magnet 210 is drawn into the first magnetic body 220 and the second magnetic body 230. As a result, the first magnetic field detection unit 641 cannot detect a change in magnetic flux density required for rotation detection. By making the magnetic comb teeth 663 equal to or less than the outer diameter 613 of the magnet 210, it is possible to detect a change in magnetic flux density required for rotation detection.

[0045] In this embodiment, the first magnetic field detection unit 641 and the second magnetic field detection unit 642 each have a Hall element. However, this embodiment is not limited to the Hall element, and other detection elements such as MR elements may be used. In addition, the first magnetic field detection unit 641 and the second magnetic field detection unit 642 may each use a different type of detection element.

[0046] Next, the change in the magnetic field during the rotation of the dial and the output signals of the first magnetic field detection unit 641 and the second magnetic field detection unit 642 will be described in detail with reference to Fig. 7 and Fig. 8. Fig. 7 is an explanatory diagram of clockwise rotation detection, and shows a graph showing the relationship between the magnetic flux density and the outputs of the first magnetic field detection unit 641 and the second magnetic field detection unit 642 that detected it. In Fig. 7, the horizontal axis indicates the rotation angle of the main dial 200. The vertical axis indicates, from the top, the magnetic flux density 620 in the thrust direction at the position of the first magnetic field detection unit 641, the first detection signal 621 of the first magnetic field detection unit 641, the magnetic flux density 622 in the thrust direction at the position of the second magnetic field detection unit 642, and the second detection signal 623 of the second magnetic field detection unit 642.

[0047] T1 indicates the absolute value of the maximum / minimum value of the magnetic flux density 620, and t1 indicates the absolute value of the detection threshold of the first magnetic field detection unit 641. T2 indicates the absolute value of the maximum / minimum value of the magnetic flux density 622, and t2 indicates the absolute value of the detection threshold of the second magnetic field detection unit 642. Here, the magnetic flux density 620 represents the magnetic flux density in the thrust direction of the magnetic field detected by the first magnetic field detection unit 641. Also, the magnetic flux density 622 represents the magnetic flux density in the thrust direction of the magnetic field detected by the second magnetic field detection unit 642.

[0048] As described above, the main dial 200 of this embodiment generates an operational feeling by the magnetic attraction force between the magnet 210 and the first magnetic body 220 and the second magnetic body 230, and the main dial 200 is rotated in units of one click. In this embodiment, a 12-click rotary operation member using a 12-polarized magnet is assumed, and Fig. 7 shows the change in magnetic flux density over 120 degrees (4 clicks).

[0049] This graph assumes that the main dial 200 is rotated clockwise at a constant speed from the left end to the right end, and as is clear from Fig. 7, each magnetic flux density changes periodically between maximum and minimum values ​​with zero as the center. In the state at the left end of the graph, the magnetic flux density 620 is at its maximum value "T1". In the same state, the magnetic flux density 622 is zero.

[0050] When the main dial 200 is rotated from this state to a 1 / 2 click, the magnetic flux density 620 becomes zero and the magnetic flux density 622 becomes the minimum value "-T2." When the main dial 200 is rotated further to a 1 click, the magnetic flux density 620 becomes the minimum value "-T1" and the magnetic flux density 622 becomes zero.

[0051] As described above, when main dial 200 moves by one click, magnet 210 rotates by one magnetic pole, and thrust direction magnetic flux density 620 and thrust direction magnetic flux density 622 each change by 1 / 2 period. Furthermore, thrust direction magnetic flux density 620 and thrust direction magnetic flux density 622 become signals that are shifted by 1 / 4 period. By detecting the order and number of times that two signals exceed the threshold value using detection unit 140, it becomes possible to determine the amount and direction of rotation of main dial 200.

[0052] Here, the detection unit 140 employs a method generally known as alternating current detection, which changes the output value from H to L when the upper threshold is exceeded. Once the upper threshold is exceeded, the output value is maintained until it falls below the lower threshold. Furthermore, once it falls below the lower threshold, the output value is maintained until it exceeds the upper threshold.

[0053] 7 assumes that the main dial 200 is rotated clockwise at a constant speed from the left end to the right end, and the left end is the output value in a state where the main dial 200 has been rotating clockwise from before. Specifically, at the left end, the first magnetic field detection unit 641 detects a state where the magnetic flux density has exceeded the upper threshold "t1", so the first detection signal 621 becomes L. Then, in the first magnetic field detection unit 641, the first detection signal 621 becomes L from the left end of the graph until it falls below the lower threshold "-t1" (point 624).

[0054] Next, in the first magnetic field detection unit 641, the first detection signal 621 is H from when it falls below the lower threshold "-t1" (at point 624) until it exceeds the upper threshold "t1" (at point 625). Also, the first detection signal 621 is L from when it exceeds the upper threshold "t1" (at point 625) until it falls below the lower threshold "-t1" again (at point 626).

[0055] On the other hand, at the left end, the second magnetic field detection unit 642 detects a state in which the magnetic flux density exceeds the upper threshold "t2", and the second detection signal 623 becomes L. Then, in the second magnetic field detection unit 642, the second detection signal 623 becomes L from the left end of the graph until it falls below the lower threshold "-t2" (point 627).

[0056] Next, in the second magnetic field detection unit 642, the second detection signal 623 is H from when it falls below the lower threshold "-t2" (at point 627) until it exceeds the upper threshold "t2" (at point 628). Also, the second detection signal 623 is L from when it exceeds the upper threshold "t2" (at point 628) until it falls below the lower threshold "-t2" again (at point 629).

[0057] 7, state 1, state 2, state 3, and state 4 are defined by combinations of the first detection signal 621 and the second detection signal 623. State 1 is when the first detection signal 621 is L and the second detection signal 623 is L. State 2 is when the first detection signal 621 is L and the second detection signal 623 is H. State 3 is when the first detection signal 621 is H and the second detection signal 623 is H. State 4 is when the first detection signal 621 is H and the second detection signal 623 is L.

[0058] When the main dial 200 rotates clockwise, from the left end of the graph, the detected states transition in the order of state 1, state 2, state 3, and state 4. In addition, when the main dial 200 rotates clockwise, the amount of rotation of one click is detected at the timing of the transition from state 2 to state 3 and at the timing of the transition from state 4 to state 1. If there is a transition from state 2 to state 3 or a transition from state 4 to state 1 within one click, the clockwise rotation direction is detected.

[0059] Fig. 8 is an explanatory diagram of counterclockwise rotation detection. The graph shown in Fig. 8 assumes that the main dial 200 is rotated counterclockwise at a constant speed from the left end to the right end, and the left end is the output value in a state in which the main dial 200 has been rotating counterclockwise from before. Specifically, at the left end, the first magnetic field detection unit 641 detects a state in which the magnetic flux density has exceeded the upper threshold value "t1", so the first detection signal 621 becomes L. Then, in the first magnetic field detection unit 641, the first detection signal 621 becomes L from the left end of the graph until it falls below the lower threshold value "-t1" (point 624).

[0060] Next, in the first magnetic field detection unit 641, the first detection signal 621 is H from when it falls below the lower threshold "-t1" (at point 624) until it exceeds the upper threshold "t1" (at point 625). Also, the first detection signal 621 is L from when it exceeds the upper threshold "t1" (at point 625) until it falls below the lower threshold "-t1" again (at point 626). Meanwhile, at the left end, the second magnetic field detection unit 642 detects a state in which the magnetic flux density falls below the lower threshold "-t2", so the second detection signal 623 is H. Then, in the second magnetic field detection unit 642, the second detection signal 623 is H from the left end of the graph until it exceeds the upper threshold "t2" (point 630).

[0061] Next, in the second magnetic field detection unit 642, the second detection signal 623 is L from when it exceeds the upper threshold "t2" (at point 630) until it falls below the lower threshold "-t2" (at point 631). Also, the second detection signal 623 is H from when it falls below the lower threshold "-t2" (at point 631) until it exceeds the upper threshold "t2" again (at point 632).

[0062] As described with reference to Fig. 7, state 1, state 2, state 3, and state 4 are defined by the combination of the first detection signal and the second detection signal. Therefore, when the main dial 200 rotates counterclockwise, the detection states transition from the left end in the order of state 2, state 1, state 4, and state 3. In addition, when the main dial 200 rotates counterclockwise, the amount of rotation of one click is detected at the timing of transition from state 1 to state 4 and at the timing of transition from state 3 to state 2. If there is a transition from state 1 to state 4 or a transition from state 3 to state 2 within one click, the counterclockwise rotation direction is detected.

[0063] As described above, state 1, state 2, state 3, and state 4 can be defined by the combination of the first detection signal 621 and the second detection signal 623. The amount and direction of rotation can be detected by the transition of these states.

[0064] Next, the arrangement of the detection units for optimizing the magnetic field detection timing will be described with reference to Figures 9(a) and (b). Figures 9(a) and (b) are diagrams showing the arrangement of the detection units.

[0065] The change in the magnetic flux density (magnetic field) detected by the first magnetic field detection unit 641 and the second magnetic field detection unit 642 is as shown in FIG. 7. The first magnetic field detection unit 641 is disposed on the radial extension of the magnetic comb tooth portion 663 on the thrust direction projection plane, and the second magnetic field detection unit 642 is disposed on the radial extension of the magnetic valley portion 664 on the thrust direction projection plane. Around the magnetic comb tooth portion 663, the magnetic field is drawn into the first magnetic body 220 and the second magnetic body 230, so the magnetic field leaking out is less than around the magnetic valley portion 664. Therefore, when the thrust direction positions and radial distances of the first magnetic field detection unit 641 and the second magnetic field detection unit 642 are the same, the magnetic flux density detected by the first magnetic field detection unit 641 is smaller than the magnetic flux density detected by the second magnetic field detection unit 642. That is, in FIG. 7 and FIG. 8, the relationship T1>T2 is established. The larger T1 is than the threshold value t1, the earlier the timing at which the threshold value t1 is exceeded. Therefore, if T1 is too large compared to the threshold value t1, there is a possibility that the threshold value t1 will be exceeded within the range of rotational play of the rotary operation member when external factors such as the temperature environment are also added. In addition, the closer T1 is to the threshold value t1, the later the timing at which it exceeds the threshold value t1 will become. Therefore, if T1 is too close to the threshold value t1, there is a possibility that T1 will not exceed the threshold value t1 when external factors such as the temperature environment are also added. For this reason, it is necessary to set the relationship between the threshold value t1 and T1 appropriately (optimally). Similarly, it is necessary to set the relationship between the threshold value t2 and T2 appropriately (optimally).

[0066] Consider a case where the threshold value t1 of the first magnetic field detection unit 641 is equal to the threshold value t2 of the second magnetic field detection unit 642, and T1>T2. In this case, when the relationship between the threshold value t1 of the first magnetic field detection unit 641 and the magnetic field detected by the first magnetic field detection unit 641 is optimal, the relationship between the threshold value t2 and the magnetic field detected by the second magnetic field detection unit 642 is not optimal.

[0067] Next, consider the case where the threshold t1 is equal to the threshold t2 and T1>T2. In this case, as shown in Fig. 9(a), by making the distance 615 in the second radial direction greater than the distance 614 in the first radial direction, it is possible to equalize the strength of the magnetic field detected by each of the first magnetic field detection unit and the second magnetic field detection unit. Also, when the threshold t1 is equal to the threshold t2 and T1>T2, the relationship between the threshold t1 / t2 and the detected magnetic field can be optimized by the method shown in Fig. 9(b).

[0068] Fig. 9(b) shows the positional relationship between the magnetic body and the detector when viewed on a radial projection plane, similar to Fig. 6(b). As shown in Fig. 9(b), the thrust direction positions of the first magnetic field detector 641 and the second magnetic field detector 642 are different. By moving the thrust direction position of the second magnetic field detector 642 farther from the center line 612 between the magnetic bodies than the first magnetic field detector 641, it is possible to make the strength of the magnetic field detected by each of the first magnetic field detector 641 and the second magnetic field detector 642 equal.

[0069] On the other hand, when T1>T2, the relationship between the threshold t1 / t2 and the magnetic field detected by the magnetic field detection units can also be optimized by making the threshold t1 of the first magnetic field detection unit 641 and the threshold t2 of the second magnetic field detection unit 642 different.

[0070] According to this embodiment, by arranging the detection portion at a position that does not overlap with the magnet in the thrust direction, it becomes possible to detect the change in magnetic flux density due to the rotation of the magnet, and thus rotation detection can be performed.

[0071] [Second embodiment] Next, an imaging device according to a second embodiment of the present invention will be described. The imaging device 100 according to the first embodiment has a large radial area occupied by the detection unit, and may not be able to be installed in the device, or the size of the device may have to be increased. In this embodiment, in consideration of the installation in the device with such placement constraints, a rotation detection configuration that can reduce the area occupied by the detection unit will be described.

[0072] The positional relationship between the magnetic body, magnet, and detection unit in this embodiment will be described with reference to Figs. 10(a) to (c). Figs. 10(a) to (c) are diagrams showing the positional relationship between the magnetic body, magnet, and detection unit. Here, only the magnetic body, magnet, and detection unit are shown as a representative example. Fig. 10(a) is a diagram showing the magnetic body, magnet, and detection unit as viewed from the thrust direction. Fig. 10(b) is a diagram showing Fig. 10(a) as viewed from the direction of arrow 710. Fig. 10(c) is a diagram showing the detection unit (magnetic field detection component 740) and the board 730 on which the detection unit is mounted as viewed from the component mounting surface (direction of arrow 780).

[0073] 10(a) and 10(b), the first magnetic body 760 and the second magnetic body 770 each have comb teeth portions equal to the number of polarizations. The comb teeth portions (first teeth portions) of the first magnetic body 760 and the comb teeth portions (second teeth portions) of the second magnetic body 770 are collectively referred to as magnetic body comb teeth portions 763. In addition, the valley portions between the magnetic body comb teeth portions 763 are referred to as magnetic body valley portions 764.

[0074] When no force is applied to the main dial 200 and the magnet 210 is stationary, as shown in FIG. 10(a), the magnetic comb teeth 763 face each pole of the magnet 210 in the thrust direction. This is due to the balance of magnetic forces between the magnet 210, the first magnetic body 760, and the second magnetic body 770. The main dial 200 is operated by the user, and the magnet 210 rotates around the rotation axis 750. At this time, an operating force is generated according to the change in the positions of the magnet 210, the first magnetic body 760, and the second magnetic body 770, and the user feels an operating sensation. Here, from the viewpoint of magnetic field detection, it is preferable that the magnetic comb teeth 763 has a length equal to or less than the outer diameter 713 of the magnet.

[0075] In this embodiment, the first magnetic field detection unit 141 described with reference to Fig. 2 corresponds to the first magnetic field detection unit 741, and the second magnetic field detection unit 142 corresponds to the second magnetic field detection unit 742. The detection unit has the first magnetic field detection unit 741 and the second magnetic field detection unit 742, and in this embodiment is configured as a magnetic field detection component 740 capable of detecting magnetic fields in two directions that intersect perpendicularly in one package, and is mounted on the substrate 730. The magnetic field detection component 740 is configured, for example, from two MR (Magneto Resistive) elements.

[0076] As shown in Fig. 10(a), the magnetic field detection component 740 is disposed on a radial extension of the magnetic body valley portion 764 on a thrust direction projection plane. As shown in Fig. 10(a) and (b), the magnetic field detection component 740 is mounted on a substrate 730 disposed approximately parallel to the circumferential direction of the magnet 210, and is disposed by fixing the substrate 730 to the first magnetic body 760 and the second magnetic body 770. At this time, the substrate 730 is a hard substrate (rigid substrate) or a flexible printed circuit board to which a reinforcing plate is attached, and the magnetic field detection component 740, which is a mounting component, is disposed at a desired position by extending from the fixing portion while maintaining flatness.

[0077] The substrate 730 is sandwiched between the first magnetic body 760 and the second magnetic body 770, and the position is determined by, for example, bonding the substrate 730 in a state where the substrate 730 is abutted against the precision surfaces of the first magnetic body 760 and the second magnetic body 770. In this manner, a portion of the substrate 730 overlaps with each of the first magnetic body 760 and the second magnetic body 770 in the thrust direction. Also, as shown in FIG. 10(c), a width direction dimension (width portion) 731 of a portion of the substrate 730 is approximately equal to a clearance (spacing) 761 between the first magnetic body 760 and the second magnetic body 770, and the substrate 730 functions as a spacer between the first magnetic body 760 and the second magnetic body 770.

[0078] From the viewpoint of magnetic field detection, the magnetic field detection component 740 is preferably disposed near the magnet 210. In this embodiment, the magnetic field detection component 740 is mounted on the radially outer surface (the surface opposite to the surface of the substrate 730 facing the magnet 210) on the thrust direction projection surface. With this configuration, contact between the magnet 210, which is a rotating body, and the magnetic field detection component 740 is unlikely to occur during a drop impact, etc., even though the magnetic field detection component 740 is disposed near the magnet 210.

[0079] As described above, the magnetic field detection component 740 can detect magnetic fields in two directions that intersect perpendicularly. Specifically, as shown in Fig. 10(c), it can detect a magnetic field 701 in the circumferential direction of the magnet 210 and a magnetic field 702 in the thrust direction. At this time, the relationship between the magnet and the detection unit when detecting the magnetic field 702 in the thrust direction is consistent with that of the first embodiment, and by replacing the magnetic field 702 in the thrust direction with the magnetic fields in the directions of the arrows 603 and 606, the relationship becomes as described with reference to Figs. 5(a) to (d).

[0080] Next, with reference to Figs. 11(a) and (b), the relationship between the magnet and the detection unit when detecting the circumferential magnetic field 701 will be described. Figs. 11(a) and (b) are diagrams showing the positional relationship between the magnet 210 and the detection unit. Here, for ease of explanation, only the magnetic field related to the detection unit is illustrated. Figs. 11(a) and (b) are diagrams showing the positional relationship between the magnet and the detection unit, and according to the third angle projection, a side view seen from the radial direction and a front view seen from the thrust direction are shown together. At this time, the circumferential magnetic field is reversed to the opposite direction at the center of the thickness direction of the magnet 210. For this reason, as shown in Figs. 10(b) and (c), the magnetic field detection component 740 is arranged with its center shifted in the thrust direction from the center of the thickness direction of the magnet 210.

[0081] Fig. 11(a) is a diagram showing the positional relationship between the magnet and the detection unit. The magnet rotates around a rotation axis 750. In Fig. 11(a), on a thrust direction projection plane, the magnetic field detection component 740 is in a rotation phase facing the boundary between the north pole and south pole of the magnet. Arrow 711 represents the magnetic field from the magnet toward the detection unit. The magnetic field emitted from the north pole passes through magnetic field detection component 740 as shown by arrow 711 and heads toward the south pole. Therefore, the detection unit detects the magnetic flux density of arrow 701a.

[0082] Fig. 11(b) is a diagram showing a state in which the magnet has rotated 30 degrees, the equivalent of one pole, around the rotation axis 750 from Fig. 11(a). Even on the thrust direction projection plane, the magnetic field detection component 740 is in a rotation phase facing the boundary between the N pole and S pole of the magnet, and the positional relationship between the N pole and S pole is reversed compared to Fig. 11(a).

[0083] Arrow 712 represents the magnetic field from the magnet toward the detection unit. The magnetic field emitted from the N pole passes through the detection unit as shown by arrow 712 and heads toward the S pole. Therefore, the detection unit detects the magnetic flux density of arrow 701c. Arrows 701a and 701c are in opposite directions, and the magnetic flux density repeatedly changes direction as shown by arrows 701a and 701c with each rotation of the magnet by one pole.

[0084] 11(a) and (b), the detection unit is positioned so as not to overlap with the magnet on the thrust direction projection plane. The detection unit detects the magnetic flux density that changes with the rotation of the magnet, and is capable of detecting the direction and amount of rotation of the magnet.

[0085] Next, the change in the magnetic field during the rotation of the dial and the output signals of the first magnetic field detection unit 741 and the second magnetic field detection unit 742 will be described in detail with reference to Fig. 12 and Fig. 13. Fig. 12 is an explanatory diagram of clockwise rotation detection, and is a graph showing the relationship between the magnetic flux density and the outputs of the first magnetic field detection unit 741 and the second magnetic field detection unit 742 that detected it. The horizontal axis indicates the rotation angle of the main dial 200. From the top, the vertical axis indicates the magnetic flux density 701 in the circumferential direction at the position of the first magnetic field detection unit 741, the first detection signal 721 of the first magnetic field detection unit 741, the magnetic flux density 702 in the thrust direction at the position of the second magnetic field detection unit 742, and the second detection signal 722 of the second magnetic field detection unit 742.

[0086] Magnetic flux density 701 is the magnetic flux density in the circumferential direction detected by the first magnetic field detection unit 741 shown in Fig. 10(a). Magnetic flux density 702 is the magnetic flux density in the thrust direction detected by the second magnetic field detection unit 742 shown in Fig. 10(a).

[0087] The main dial 200 of this embodiment generates an operational feeling by the magnetic attraction force between the magnet 210 and the first magnetic body 760 and the second magnetic body 770, and the main dial 200 is rotated in units of one click. In this embodiment, a 12-click rotary operation member using a 12-polarized magnet is assumed, and Fig. 12 shows the change in magnetic flux density over 120 degrees (4 clicks).

[0088] The graph in Fig. 12 assumes that the main dial 200 is rotated clockwise at a constant speed from the left end to the right end, and as is clear from the figure, each magnetic flux density changes periodically between maximum and minimum values ​​with zero as the center. In the state at the left end of the graph, magnetic flux density 701 has a maximum value "T3". In the same state, magnetic flux density 702 is zero.

[0089] When the main dial 200 is rotated from this state to 1 / 2 click, the magnetic flux density 701 becomes zero and the magnetic flux density 702 becomes the minimum value "-T4". When the main dial 200 is rotated further to 1 click, the magnetic flux density 701 becomes the minimum value "-T1" and the magnetic flux density 622 becomes zero.

[0090] As described above, when the main dial 200 moves by one click, the magnet 210 rotates by one magnetic pole, and the magnetic flux density 701 in the circumferential direction and the magnetic flux density 702 in the thrust direction each change by 1 / 2 period. In addition, the magnetic flux density 701 in the circumferential direction and the magnetic flux density 702 in the thrust direction become signals that are shifted by 1 / 4 period. By detecting the order and number of times that these two signals exceed the threshold value using the magnetic field detection component 740, it is possible to determine the amount and direction of rotation of the main dial 200.

[0091] Here, the magnetic field detection component 740 employs a method generally known as an alternating detection type, which changes the output value from H to L when the upper threshold is exceeded. Once the upper threshold is exceeded, the output value is maintained until the lower threshold is exceeded. Furthermore, once the lower threshold is exceeded, the output value is maintained until the upper threshold is exceeded.

[0092] 12 assumes that the main dial 200 is rotated clockwise at a constant speed from the left end to the right end, and the left end is the output value in a state where the main dial 200 has been rotating clockwise from before. Specifically, at the left end, the first magnetic field detection unit 741 detects a state where the magnetic flux density has exceeded the upper threshold "t3", so the first detection signal 721 becomes L. Then, in the first magnetic field detection unit 741, the first detection signal 721 becomes L from the left end of the graph until it falls below the lower threshold "-t3" (point 724).

[0093] Next, in the first magnetic field detection unit 741, the first detection signal 721 becomes H from when it falls below the lower threshold "-t3" (at point 724) until it exceeds the upper threshold "t3" (at point 725). Furthermore, the first detection signal 721 becomes L from when it exceeds the upper threshold "t3" (at point 725) until it falls below the lower threshold "-t3" again (at point 726).

[0094] On the other hand, at the left end, the second magnetic field detection unit 742 detects a state in which the magnetic flux density exceeds the upper threshold "t4", and the second detection signal 722 becomes L. Then, in the second magnetic field detection unit 742, the second detection signal 722 becomes L from the left end of the graph until it falls below the lower threshold "-t4" (point 727).

[0095] Next, in the second magnetic field detection unit 742, the second detection signal 722 becomes H from when it falls below the lower threshold "-t4" (at point 727) until it exceeds the upper threshold "t4" (at point 728). Furthermore, the second detection signal 722 becomes L from when it exceeds the upper threshold "t4" (at point 728) until it falls below the lower threshold "-t4" again (at point 729).

[0096] As shown in the table of FIG. 12, state 1, state 2, state 3, and state 4 are defined by the combination of the first detection signal 721 and the second detection signal 722. State 1 is when the first detection signal 721 is L and the second detection signal 722 is L. State 2 is when the first detection signal 721 is L and the second detection signal 722 is H. State 3 is when the first detection signal 721 is H and the second detection signal 722 is H. State 4 is when the first detection signal 721 is H and the second detection signal 722 is L. When the main dial 200 rotates clockwise, the detection state transitions from the left end of the graph in the order of state 1, state 2, state 3, and state 4. In addition, when the main dial 200 rotates clockwise, a rotation amount of one click is detected at the timing of transition from state 2 to state 3 and at the timing of transition from state 4 to state 1. If there is a transition from state 2 to state 3 or from state 4 to state 1 within one click, a clockwise rotation direction is detected.

[0097] Fig. 13 is an explanatory diagram of counterclockwise rotation detection. The graph in Fig. 13 assumes that the main dial 200 is rotated counterclockwise at a constant speed from the left end to the right end, and the left end is the output value in a state where the main dial 200 has been rotating counterclockwise from before. Specifically, at the left end, the first magnetic field detection unit 741 detects a state where the magnetic flux density has exceeded the upper threshold "t3", so the first detection signal 721 becomes L. Then, in the first magnetic field detection unit 741, the first detection signal 721 becomes L from the left end of the graph until it exceeds the lower threshold "-t3" (point 724).

[0098] Next, in the first magnetic field detection unit 741, the first detection signal 721 becomes H from when it falls below the lower threshold "-t3" (at point 724) until it exceeds the upper threshold "t3" (at point 725). Furthermore, the first detection signal 721 becomes L from when it exceeds the upper threshold "t3" (at point 725) until it falls below the lower threshold "-t3" again (at point 726).

[0099] On the other hand, at the left end, the second magnetic field detection unit 742 detects a state in which the magnetic flux density falls below the lower threshold "-t4", and so the second detection signal 722 becomes H. Then, in the second magnetic field detection unit 742, the second detection signal 722 becomes H from the left end of the graph until it exceeds the upper threshold "t4" (point 751).

[0100] Next, in the second magnetic field detection unit 742, the second detection signal 722 is L from when it exceeds the upper threshold "t4" (at point 751) until it falls below the lower threshold "-t4" (at point 752). Also, the second detection signal 722 is H from when it falls below the lower threshold "-t4" (at point 752) until it again exceeds the upper threshold "t4" (at point 753).

[0101] As described with reference to FIG. 12, state 1, state 2, state 3, and state 4 are defined by the combination of the first detection signal and the second detection signal. Therefore, when the main dial 200 rotates counterclockwise, the detection state transitions from the left end in the order of state 2, state 1, state 4, and state 3. In addition, when the main dial 200 rotates counterclockwise, the rotation amount of one click is detected at the timing of transition from state 1 to state 4 and at the timing of transition from state 3 to state 2. If there is a transition from state 1 to state 4 or a transition from state 3 to state 2 during one click, the counterclockwise rotation direction is detected. As described above, state 1, state 2, state 3, and state 4 can be defined by the combination of the first detection signal 721 and the second detection signal 722. Then, the rotation amount and rotation direction can be detected by these state transitions. According to this embodiment, the expansion of the area occupied by the detection part can be suppressed, and the rotation amount and rotation direction of the main dial 200 can be detected.

[0102] According to each embodiment, it is possible to provide a magnetic rotary operation device and electronic device that are excellent in dust-proof and drip-proof performance.

[0103] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist of the present invention.

[0104] For example, in each embodiment, a rotation operation device provided in an imaging device has been described, but this is not limited to this, and the rotation operation device in each embodiment can also be applied to a game console controller, an in-vehicle operation device, etc. [Explanation of symbols]

[0105] 10. Chassis 20 Dial unit (rotary operation device) 200 Main dial (rotating operation part) 210 Magnet 220 First magnetic material 221 First comb tooth part (first tooth part) 230 Second magnetic material 231 Second comb tooth part (second tooth part) 240 Base material

Claims

1. A rotation operation member that is rotatable around a predetermined axis; a base member that rotatably supports the rotary operation member; a ring-shaped magnet having a plurality of alternately magnetized magnetic poles, the direction of the magnetization being parallel to the predetermined axis, and rotating about the predetermined axis together with the rotation of the rotation operation member; a first magnetic body and a second magnetic body respectively arranged to face the magnetized surface of the magnet and sandwich the magnet; A housing for holding the base member; A detection unit that detects a change in a magnetic field caused by rotation of the magnet, The first magnetic body has a first tooth portion, and the second magnetic body has a second tooth portion, an operating force can be generated in response to a change in position of the magnetic pole, the first teeth portion, and the second teeth portion due to rotation of the magnet; the magnet, the first magnetic body, and the second magnetic body are housed inside the housing, A rotary operation device, characterized in that, when viewed from a thrust direction of the magnet, the detection unit is arranged in a position that does not overlap with the magnet.

2. The detection unit includes a first magnetic field detection unit and a second magnetic field detection unit, The rotary manipulation device according to claim 1 , wherein the first magnetic field detection unit and the second magnetic field detection unit detect the magnetic field in the thrust direction of the magnet.

3. When viewed from the thrust direction, the first magnetic field detection unit is disposed on a radial extension of the first tooth portion of the first magnetic body and the second tooth portion of the second magnetic body, The rotary operation device according to claim 2 , wherein the second magnetic field detection unit is disposed on an extension in the radial direction of each of the valleys of the first magnetic body and the second magnetic body.

4. The rotary operating device according to claim 2 or 3, characterized in that the first magnetic field detection unit and the second magnetic field detection unit are arranged between the first magnetic body and the second magnetic body in the thrust direction.

5. A rotary operating device as described in any one of claims 2 to 4, characterized in that when viewed from the thrust direction, the tips of the first tooth portion and the second tooth portion are positioned at a position closer to the specified axis than the outer diameter of the magnet.

6. 6. A rotary manipulation device according to claim 2, wherein at least one of a radial arrangement, a thrust arrangement, or a detection threshold of the first magnetic field detection unit and the second magnetic field detection unit is different.

7. The detection unit includes a first magnetic field detection unit and a second magnetic field detection unit, 2. The rotary manipulation device according to claim 1, wherein the first magnetic field detection unit and the second magnetic field detection unit detect the magnetic field in a circumferential direction and a thrust direction of the magnet.

8. When viewed from the thrust direction, The rotary operating device described in claim 7, characterized in that the first magnetic field detection unit and the second magnetic field detection unit are arranged on radial extensions of the magnet of the respective valley portions of the first magnetic body and the second magnetic body.

9. 9. The rotary manipulation device according to claim 7, further comprising a substrate on which the first magnetic field detection unit and the second magnetic field detection unit are mounted, the substrate being arranged parallel to the circumferential direction of the magnet.

10. The rotary manipulation device according to claim 9 , wherein the first magnetic field detection unit and the second magnetic field detection unit are mounted on a surface of the substrate opposite to a surface facing the magnet.

11. 11. The rotary operation device according to claim 9, wherein a portion of the substrate overlaps with each of the first magnetic body and the second magnetic body in the thrust direction.

12. A rotary manipulation device described in any one of claims 9 to 11, characterized in that the substrate is a rigid substrate provided between the first magnetic body and the second magnetic body, and functions as a spacer between the first magnetic body and the second magnetic body.

13. 13. The rotary operation device according to claim 9, wherein the first magnetic field detection unit and the second magnetic field detection unit are mounted on the substrate as a single package.

14. 14. The rotary manipulation device according to claim 7, wherein the first magnetic field detection unit and the second magnetic field detection unit are disposed offset from the center of the magnet in the thrust direction.

15. The rotary operation device according to any one of claims 1 to 14, characterized in that the first tooth portion and the second tooth portion are comb teeth portions extending radially from a center toward an outer periphery so as to face the multiple magnetic poles.

16. 16. The rotary operation device according to claim 1, wherein the magnet, the first magnetic body, and the second magnetic body are arranged on an opposite side of the base member from the rotary operation member.

17. 17. The rotary operation device according to claim 1, wherein the rotary operation member is operable in a plane parallel to the predetermined axis.

18. 18. The rotary operation device according to claim 1, wherein a part of the rotary operation member is exposed from the housing.

19. A rotary operation device according to any one of claims 1 to 18, and a control unit that performs a predetermined process in response to rotation of the magnet.

20. 20. The electronic device according to claim 19, wherein the electronic device is an imaging device that captures an image of a subject to obtain an image.

Images