JP2019197711A - Electronic apparatus - Google Patents

Abstract

To provide an electronic apparatus which has a rotary operation member capable of detecting rotation so as to prevent such situations that the rotation operation is not effective and erroneous operation and the like occur even if iron sand adheres to the vicinity of a rotary magnet.SOLUTION: An electronic apparatus includes: a magnetic field generation member (251) whose magnetic pole changes at a prescribed pitch following rotation of a rotary operation member (260); a magnetic field detection unit (121) which can detect a magnetic field (301) in a prescribed direction; calculation means which calculates a rotation amount of the rotary operation member (260) and a rotation direction of the rotary operation member (260) in accordance with a change amount of the magnetic field (301) in the prescribed direction; and a base member (210) which holds the magnetic field detection unit (121). At least one of the rotary operation member (260) and the base member (210) is provided with a protrusion part (201). The protrusion part (201) is provided between the rotary operation member (260) and the base member (210).SELECTED DRAWING: Figure 3

Description

  The present invention relates to an operation member (rotary dial, rotation ring) of an electronic device, and more particularly to a configuration of a rotation operation member that a user performs a rotation operation.

  In an imaging apparatus such as a digital camera, it is possible to set shooting conditions and select functions by rotating a rotary operation member such as a dial. As a method for detecting the rotation of the rotation operation member, a method using a magnetic sensor has been proposed.

  For example, in Patent Document 1, a configuration in which a rotation direction and an amount of rotation are detected by a GMR sensor and a ring-shaped rotary magnet that rotates integrally with a rotation operation member and is alternately magnetized with S and N poles in the circumferential direction. Is disclosed.

  When the rotary operation member is operated, a click feeling can be generated by the magnetic force between the rotary magnet and the fixed magnet.

JP 2013-073726 A

  However, in the prior art disclosed in Patent Document 1 described above, dust may enter between the rotation operation member and the camera housing.

  Further, magnetic materials such as iron sand contained in the dust may be attracted by the magnetic field generated from the rotating magnet and attached to the rotating operation member holding the rotating magnet.

  When iron sand adheres to the vicinity of the rotating magnet, the strength and direction of the magnetic field of the rotating magnet may change for each magnetic pole of the rotating magnet.

  Therefore, the GMR sensor does not correctly detect the rotation direction and amount, and there is a risk that the operation will not work or a malfunction may occur.

  Therefore, an object of the present invention is to provide a rotation operation member capable of detecting rotation so that rotation operation does not work or malfunction does not occur even when iron sand adheres to the vicinity of the rotation magnet. Is to do.

In order to achieve the above object, an electronic device of the present invention includes a rotary operation member that is rotatably held with respect to a rotary shaft, and a magnetic field generation in which a magnetic pole changes at a predetermined pitch as the rotary operation member rotates. A member, a magnetic field detection unit capable of detecting a magnetic field in a predetermined direction, and a calculation unit that calculates a rotation amount and a rotation direction of the rotation operation member according to a change amount of the magnetic field in the predetermined direction generated by the magnetic field detection unit; An electronic device having a base member for holding the magnetic field detection unit,
The region where the magnetic field detector and the rotation operation member face each other is separated by a predetermined interval,
In a region where the magnetic field detection unit and the rotation operation member face each other, at least one of the rotation operation member and the base member is formed with a tapered protrusion extending in the detection axis direction of the magnetic field detection unit. It is characterized by.

  According to the present invention, it is possible to obtain a rotation operation member capable of detecting rotation so that rotation operation does not work or malfunction does not occur even when iron sand adheres to the vicinity of the rotation magnet. I can do it.

1 is an external view of an electronic apparatus according to an embodiment of the present invention. The system block diagram of the electronic device which concerns on embodiment of this invention 1 is a configuration diagram of a rotation operation member included in the electronic apparatus of FIG. Sectional drawing of the rotation operation member with which the electronic device of FIG. Arrangement of magnet and Hall IC according to an embodiment of the present invention The figure which shows the signal of the magnetic field and Hall IC which concern on embodiment of this invention The figure which shows the signal of the magnetic field and Hall IC which concern on embodiment of this invention The figure which shows the signal of the magnetic field and Hall IC which concern on embodiment of this invention Sectional drawing of the magnet holding member and base member which concern on embodiment of this invention Sectional drawing of the magnet holding member and base member which concern on embodiment of this invention The block diagram of the magnet holding member and base member which concern on the 2nd Embodiment of this invention External view of the electronic device which concerns on the 3rd Embodiment of this invention The figure which shows the specific shape of the projection part of this invention

(First embodiment)
Hereinafter, an electronic device according to a first embodiment of the present invention will be described with reference to FIGS. Note that a case where the present invention is applied to an imaging device will be described as an example of an electronic device.

(External view of imaging device)
FIGS. 1A and 1B are external views of an imaging apparatus equipped with a rotary dial as a rotary operation member of the present invention.

  FIG. 1A is a front perspective view of the imaging apparatus 100, and FIG. 1B is a rear perspective view of the imaging apparatus 100.

  The shutter button 61 is an operation unit for issuing a shooting instruction. The mode switch 60 is an operation unit for switching various modes.

  The power switch 72 is an operation member that switches the power of the imaging apparatus 100 on and off.

  The liquid crystal screen 40 is a display device using a TFT or an organic EL, and displays various setting screens and captured images of the imaging device.

  The rotary dial 200 is a dial-like rotary operation member that can be rotated without striking clockwise or counterclockwise. By turning the rotary dial 200, various setting values such as a shutter speed and an aperture can be changed.

  The sub dial 400 is a rotation operation member, and is used for various operations such as shooting mode selection, distance measuring point selection, image reproduction, menu operation, and the like.

  The SET button 401 is a push button and is mainly used for determining a selection item.

  The communication terminal 10 (not shown) is a communication terminal for the imaging apparatus 100 to communicate with a photographic lens 13 (detachable) not shown.

  The eyepiece finder 16 is a view-type finder for observing a focusing screen (not shown) to confirm the focus and composition of an optical image of a subject obtained through a lens unit (not shown).

  FIG. 2 is a system block diagram of the imaging apparatus 100.

  The non-volatile memory 101 stores a program when the CPU 150 described later performs an operation.

  In this embodiment, the description will be made as a Flash-ROM, but this is an example, and other memories can be applied as long as they are nonvolatile memories.

  The RAM 102 is a RAM used as a work memory when the CPU 150 (to be described later) operates, and a function of a storage unit for temporarily storing an image buffer photographed by the imaging apparatus 100 and image processed image data. .

  In the present embodiment, these functions are performed by the RAM. However, other memories may be applied as long as the access speed is a level that does not cause a problem.

  The power supply unit 105 is a power supply unit of the imaging apparatus 100. The power supply unit 105 includes a battery, an AC adapter, and the like, and supplies power to each block of the imaging apparatus 100 directly or through a DC-DC converter (not illustrated).

  The power switch 72 is a power switch of the imaging apparatus 100. In this embodiment, as shown in FIG. 1, a structure having a mechanically on / off position will be described.

  However, it is not necessary to limit to this, and you may comprise a push switch, an electrical switch, etc.

  When the power switch 72 is turned off, even if the power supply unit 105 is inserted in the imaging device 100, the imaging device 100 does not function as an imaging device and maintains a low power consumption state.

  When the power supply unit 105 is inserted while the power switch 72 is on, the imaging device 100 functions as an imaging device.

  The CPU 150 is a CPU that comprehensively controls the imaging apparatus 100. An imaging function which is a basic function as an imaging apparatus is realized.

  In addition, mode switching of the imaging apparatus 100, display update of the liquid crystal screen 40, and the like are performed in accordance with the detection result of the rotation operation member 260 of the Hall IC detection method described later.

(Block diagram of imaging device)
The timer 151 is a timer function capable of measuring an arbitrary time. In FIG. 2, the configuration built in the CPU 150 will be described, but an external configuration may be used.

  It has a function of starting time measurement in response to an instruction from the CPU 150 and ending time measurement in response to an instruction from the CPU 150.

  It also has a function of continuously operating the timer and periodically generating an interrupt to the CPU 150 at predetermined time intervals.

  The counter 152 is a counter function for counting the number of operations of the rotation operation member 260 described later.

  In FIG. 2, a description is given of a configuration built in the CPU 150, but an external configuration may be used.

  In FIG. 2, the configuration is described in which the number of operations of the rotation operation member 260 is counted, but the number of operations of an arbitrary operation unit can be counted.

  The Hall IC 241 is a magnetic sensor IC including a transverse magnetic field detection unit 122 that can detect a magnetic field in a specific direction and a vertical magnetic field detection unit 121 that can detect a magnetic field in a direction perpendicular thereto.

  In FIG. 2, a description is given of a configuration externally attached to the CPU 150, but a configuration built in the CPU 150 may be used.

  The lateral magnetic field detection unit 122 and the vertical magnetic field detection unit 121 of the Hall IC 241 have arbitrary upper threshold values and lower threshold values set, and when the detected magnetic flux density exceeds or falls below the above threshold value. A predetermined signal is output.

  Further, it is possible to read the detected magnetic flux density of the transverse magnetic field detector 122 to the longitudinal magnetic field detector 121 at an arbitrary timing in accordance with an instruction from the CPU 150.

  The magnet 251 is a ring-shaped permanent magnet, and S poles and N poles are alternately magnetized at a constant pitch in the circumferential direction.

  Although details will be described with reference to FIG. 3 and subsequent figures, the magnet 251 rotates integrally with the rotation operation member 260, detects a change in magnetic flux density with the Hall IC 241, and calculates the rotation direction and the rotation amount of the rotation operation member 260.

(Description of rotation operation member 260)
Hereinafter, the configuration of the rotation operation member 260 will be described with reference to FIGS. 3 and 4.

  FIG. 3 is an exploded perspective view showing an example of the structure of the rotation operation member 260.

  FIG. 4 is a configuration diagram of the rotation operation member 260, and FIG. 4A is a front view of the rotation operation member 260. FIG. 4B is a cross-sectional view showing a cross section connecting the rotation center of the rotation operation member 260 and a Hall IC 241 described later.

  FIG. 4C is an enlarged view of FIG.

  Reference numeral 210 denotes a base member, and 204 denotes a cover member. The rotation operation member 260 is rotatably held.

  The base member 210 is fixed to the upper surface cover 110 (not shown in FIGS. 3 and 4) of the imaging apparatus 100 by two fixing portions 210a and 210b.

  Reference numeral 251 denotes a magnet in which N and S poles are alternately polarized at an equal pitch.

  The magnet 251 has a magnetized surface 251a on each of the N pole and the S pole, and a magnetic field is generated in a direction perpendicular to the magnetized surface 251a.

  Reference numeral 252 denotes a magnet positioning portion provided on the magnet 251.

  The magnet 251 has the magnet positioning portion 252 engaged with the magnet positioning groove 203 (not shown in FIGS. 3 and 4) of the rotation operation member 260, so that the rotation direction of the magnet 251 is relative to the rotation axis. Positioning in the rotational direction is possible.

  With this configuration, the magnet 251 can rotate integrally with the rotation operation of the rotation operation member 260.

  Reference numeral 211 denotes a ball member which is held by the ball holding portion 210c of the base member 210 so as to be able to advance and retreat in a direction orthogonal to the rotation axis of the rotation operation member 260.

  Reference numeral 212 denotes a spring member that urges the ball member 211 in a direction in which the ball member 211 comes into contact with the uneven shape 230 f of the click plate 230.

  The concave / convex shape 230f has concave portions 230g and convex portions 230h alternately formed at equal pitches.

  When the user rotates the rotation operation member 260, the ball member 211 advances and retreats along the concavo-convex shape f in the ball holding portion 210c, and a click feeling is generated.

  Reference numeral 241 denotes a Hall IC, which can detect the strength of magnetic fields in two directions (a longitudinal magnetic field and a transverse magnetic field described later).

  Reference numeral 240 denotes a substrate on which the Hall IC 241 is mounted.

  The substrate 240 has substrate positioning holes 240a and 240b, and is positioned by fitting with the bosses 250d and 250e of the base member 210 so that the Hall IC 241 is positioned to face the magnetized surface 251a of the magnet 251.

  With such a configuration, the magnetic field generated from the magnetized surface 251a of the magnet 251 can be detected by the Hall IC 241. This detection method will be described later.

  Reference numeral 206 denotes a magnet fixing member, which is used to fix the rotation operation member 260 and the magnet 251.

  The magnetic field generated from the magnetized surface 251a of the magnet 251 forms a magnetic field in the direction of the arrow shown in FIG.

  When the rotation operation member 260 is operated, the magnet 251 rotates integrally, and the magnetic field generated in the Hall IC 241 portion changes.

  By detecting this magnetic field change by the Hall IC 241, it is possible to detect the rotational operation of the rotation operation member 260.

  As shown in FIG. 4C, 201 is a circumferential projection provided so as to be symmetrical with respect to the rotation axis of the rotation operation member 260, and faces the Hall IC 241 of the rotation operation member 260. Provided in position.

  The protrusion 201 is provided with a vertex 201c. The protrusion 201 has an inner gradient 201b on the rotation axis side and an outer gradient 201a on the opposite side with respect to the position of the vertex 201c.

  The apex 201c of the protrusion 201 is provided so as to always coincide with the detection axis (axis E) of the Hall IC 241 regardless of the rotation phase of the rotation operation member 260.

  Reference numeral 202 denotes a circumferential groove provided so as to be symmetrical with respect to the rotation axis of the rotation operation member 260, and is provided at a position facing the Hall IC 241 of the rotation operation member 260.

  The groove part 202 is provided on the opposite side of the rotation axis with respect to the position of the protrusion part 201.

  The rotating dial 200 described above can be rotated by projecting a part of the dial outside the imaging apparatus 100. For this reason, as shown in FIG. 1 (a) and FIG. 10 (a) described later, it is necessary to provide a gap in the rotation axis direction between the rotary dial 200 and the upper surface cover 110. There is a risk that dust will enter the battery.

(Description of magnetic field detection by Hall IC 241)
Next, the detection of the magnetic field generated by the magnet 251 and the magnetic field by the Hall IC 241 will be described with reference to FIG.

  The magnet 251 is a magnetic field generating member whose magnetic poles change at a predetermined pitch with the rotation of the rotary dial 200 as a rotation operation member.

  The Hall IC 241 is a magnetic field detector that can detect a magnetic field in a predetermined direction.

  A region where the Hall IC 241 as the magnetic field detection unit and the rotary dial 200 as the rotation operation member face each other is separated by a predetermined interval.

  In a region where the Hall IC 241 as the magnetic field detection unit and the rotary dial 200 as the rotation operation member face each other, a tapered protrusion 210 extending in the detection axis direction of the Hall IC 241 is formed on the rotary dial 200 (FIG. 4). ).

  5A is a view of the magnet 251 and the Hall IC 241 viewed from the dial rotation axis direction, and FIG. 5B is a view of the magnet 251 and the Hall IC 241 viewed from the direction perpendicular to the rotation axis (the direction of arrow C in the figure). It is a figure.

  The magnet 251 is polarized at an equal pitch to 20 poles, 10 poles of N poles and 10 poles of S poles.

  A Hall IC 241 is disposed on the magnetized surface 251a side of the magnet 251 so that the center of the width of the magnet 251 coincides with the detection unit 241a of the Hall IC 241.

  The Hall IC 241 detects the magnetic flux density of the magnetic field in the central axis direction (the dial rotation axis direction (arrow A direction)) of the magnet 251 and the tangential direction of the circle of the magnet 251 (arrow B direction), and represents the state of each magnetic field. A predetermined signal is output.

  Details of the output signal of the Hall IC 241 will be described later.

  FIGS. 5C and 5D are enlarged views of the vicinity of the Hall IC 241 when the magnet 251 is viewed from a direction (arrow C direction) orthogonal to the dial rotation axis.

  FIG. 5C shows a state in which the detection unit 241a of the Hall IC 241 and the center of the S pole coincide with each other in the horizontal direction of the drawing.

  FIG. 5D shows a state in which the magnet 251 rotates around the dial rotation axis from the state of FIG. 5C and the boundary between the detection unit 241a of the Hall IC 241 and the S pole N pole coincides.

  The magnet 251 is magnetized so as to have polar anisotropic orientation.

  That is, the magnetic field inside the magnet 251 is not a straight line perpendicular to the magnetized surface 251a.

  As indicated by the magnetic field 254 in the magnet, the vertical direction rises again from the S pole of the magnetized surface 251a and then toward the N pole after the vertical rise, and the vertical direction is again at the N pole of the magnetized surface 251a.

  Outside the magnet 251, as indicated by a magnetic flux 253, the magnetic flux that rises vertically from the north pole draws an arc and travels toward the south pole.

  Similarly, FIG. 5 (e) shows a state where the detection unit 241a of the Hall IC 241 and the N pole center coincide with each other in the horizontal direction of the drawing, and FIG. 5 (f) rotates by one magnetic pole from the state of FIG. 5 (d). , S pole and N pole are shown switched.

  Here, the magnetic field in the direction of arrow A in FIG. 5A is defined as the longitudinal magnetic field 253a, and the magnetic field in the direction of arrow B in FIG. 5A is defined as the transverse magnetic field 253b.

  In this case, in the state of FIG. 5C, the longitudinal magnetic field 253a is detected by the detection unit 241a of the Hall IC 241 and the transverse magnetic field 253b is not detected.

  Conversely, in the state of FIG. 5D, the longitudinal magnetic field 253a is not detected, but only the transverse magnetic field 253b is detected.

  Further, in a state in the middle from FIG. 5C to FIG. 5D, the longitudinal magnetic field 253a and the transverse magnetic field 253b are detected with the strength according to the rotation state.

  That is, FIG. 5C shows a state where the longitudinal magnetic field 253a is maximum and the longitudinal magnetic field 253a is zero, and FIG. 5D shows a state where the longitudinal magnetic field 253a is zero and the longitudinal magnetic field 253a is maximum.

  When the magnet 251 is rotated around the dial rotation axis, the longitudinal magnetic field 253a and the transverse magnetic field 253b detected by the detection unit 241a of the Hall IC 241 take a value corresponding to the rotation state between zero and the maximum value.

(Description of change in magnetic field and output signal of Hall IC 241 during dial rotation)
The details of the change in the magnetic field and the output signal of the Hall IC 241 during dial rotation will be described below with reference to FIG.

  FIG. 6A is a graph showing the relationship between the strength of the longitudinal and transverse magnetic fields and the output of the Hall IC 241 that detects the strength. The horizontal axis represents the rotation angle of the rotary operation member 260, and the vertical axis represents the magnetic field strength and the signal output value.

  As described above, the rotation operation member 260 of this embodiment has a click mechanism using the uneven shape 230f, the ball member 211, and the spring member 212, and the rotation operation of the rotation operation member 260 is performed with one click as a basic unit. Will be.

  I to IV shown on the horizontal axis represent click positions, and the angle between them is one click. The click positions indicated by I to IV are in a state where the ball member 211 is in contact with the recess 230g.

  First, the longitudinal magnetic flux density 301 and the transverse magnetic flux density 302 are shown in the upper part of the graph. The longitudinal magnetic flux density 301 represents the magnetic flux density of the longitudinal magnetic field 253a (see FIG. 5C) of the magnetic field detected by the Hall IC 241.

  The transverse magnetic flux density 302 represents the magnetic flux density of the transverse magnetic field 253b of the magnetic field detected by the Hall IC 241.

  Here, it is assumed that the rotation operation member 260 is rotated in the clockwise direction at a constant speed. As is apparent from the figure, each magnetic flux density is between the maximum value and the minimum value centering on zero. It changes periodically.

  In the state of the rotation angle I, as indicated by 301a, the longitudinal magnetic flux density 301 takes the maximum value. In addition, the transverse magnetic flux density 302 becomes zero as indicated by 302a in the same state.

  This means that, as shown in FIG. 5C, the magnetic field detected by the Hall IC 241 has only an arrow A direction component and no arrow B direction component.

  When the rotary operation member 260 rotates from this state and reaches a state indicated by 301b, the longitudinal magnetic flux density 301 becomes zero, and the transverse magnetic flux density 302 takes the minimum value as indicated by 302b in the same state.

  This means that the magnetic field detected by the Hall IC 241 has no arrow A direction component, only the arrow B direction component, and opposite to the arrow B, as shown in FIG. .

  When the rotation operation member 260 further rotates and enters the state indicated by 301c and 302c, as shown in FIG. 5E, the magnetic field detected by the Hall IC 241 is only the component in the direction opposite to the arrow A, and the component in the arrow B direction. There will be no state.

  When this state is reached, the rotation operation member 260 is rotated by one click from the rotation angle I to the rotation angle II.

  Further, when proceeding to the points indicated by 301d and 302d, there is no component in the direction of arrow A and only the component in the direction of arrow B is detected by the Hall IC 241 as shown in FIG.

  Further, between the four states of FIGS. 5C to 5F, the longitudinal magnetic flux density 301 and the transverse magnetic flux density 302 take values corresponding to the rotation angle of the rotation operation member 260.

  As described above, when the rotation operation member 260 moves by one click, the magnet 251 rotates by one magnetic pole, and the longitudinal magnetic flux density 301 and the transverse magnetic flux density 302 change by 1/2 period.

  The longitudinal magnetic flux density 301 and the transverse magnetic flux density 302 change only by a half period, but become periodic signals that are shifted by the magnetization pitch.

  By detecting the order and the number of times that the maximum values of these two signals appear, the rotation amount and the rotation direction of the rotation operation member 260 can be obtained.

  Next, signals output from the Hall IC 241 will be described.

  The upper threshold value 307 a and the lower threshold value 307 b of the Hall IC 241 are shown so as to overlap with the graphs of the vertical magnetic flux density 301 and the horizontal magnetic flux density 302.

  The Hall IC 241 periodically samples the magnetic flux passing through the detection unit 241a.

  When the detected vertical and horizontal magnetic flux density exceeds the upper threshold value 307 a or lower than the lower threshold value 307 b, the vertical magnetic field signal 303 and the horizontal magnetic field signal 304 are changed inside the Hall IC 241.

  Details will be described below. The longitudinal magnetic field signal 303 and the transverse magnetic field signal 304 are signals corresponding to the longitudinal magnetic flux density 301 and the transverse magnetic flux density 302.

  When each magnetic flux density exceeds the upper threshold value 307a, the signal changes from H (Hi) to L (Lo), and when the magnetic flux density falls below the lower threshold value 307b, the signal changes from L to H.

  If none of the above applies, the current value is retained.

  In the state of the rotation angle I in FIG. 6A, the longitudinal magnetic flux density 301 exceeds the upper threshold value 307a.

  Therefore, the longitudinal magnetic field signal 303 is L, and the transverse magnetic flux density 302 has not progressed to a state below the lower threshold value 307b after exceeding the upper threshold value 307a.

  Therefore, this is also L.

  From this state, the rotation operation member 260 rotates, and the Hall IC 241 periodically samples the magnetic flux density and continuously updates the longitudinal magnetic field signal 303 and the transverse magnetic field signal 304. The point indicated by 302e is reached.

  In that case, the transverse magnetic flux density 302 falls below the lower threshold value 307b, and the Hall IC 241 detects the magnetic flux density by sampling the rotation angle Ia immediately after that.

  Then, it is detected that the transverse magnetic flux density 302 has fallen below the lower threshold value 307b, and the transverse magnetic field signal 304 is changed from L to H.

  At this time, since the longitudinal magnetic flux density 301 is not lower than the lower threshold value 307b, the longitudinal magnetic field signal 303 remains L.

  Further, when the rotation operation member 260 rotates and exceeds the point indicated by 301e, the longitudinal magnetic flux density 301 falls below the lower threshold value 307b.

  The Hall IC 241 detects the magnetic flux density in the state of the rotation angle Ib immediately after this, detects that the longitudinal magnetic flux density 301 is below the lower threshold value 307b, and changes the longitudinal magnetic field signal 303 from L to H.

  At this time, since the transverse magnetic flux density 302 does not exceed the upper threshold value 307a, the transverse magnetic field signal 304 remains H.

  When the rotary operation member 260 rotates and reaches the point indicated by 302f, the transverse magnetic flux density 302 exceeds the upper threshold value 307a.

  At the time of sampling of the rotation angle IIa immediately after that, the transverse magnetic field signal 304 changes from H to L, and the longitudinal magnetic field signal 303 remains H.

  When further proceeding to the point 301f, the longitudinal magnetic flux density 301 exceeds the upper threshold value 307a, the longitudinal magnetic field signal 303 changes from H to L at the time of sampling at the immediately subsequent rotation angle IIb, and the transverse magnetic field signal 304 continues to be L.

  Thus, by rotating the magnet 251 integrally with the rotation operation member 260 at a constant speed, the Hall IC 241 has a longitudinal magnetic field signal 303 and a transverse magnetic field signal 304 of the longitudinal magnetic flux density 301 and the transverse magnetic flux density 302 having the same period. A rectangular signal is output.

  By adopting such a configuration, the longitudinal magnetic flux density 301 and the transverse magnetic flux density 302 which are analog waveforms become rectangular waves, so that the CPU 150 can easily perform processing.

  Here, when taking the exclusive OR (XOR) of the longitudinal magnetic field signal 303 and the transverse magnetic field signal 304, a signal as shown by a pulse signal 305 is obtained.

  As is apparent from the figure, the pulse signal 305 is a rectangular wave that changes at half the period of the longitudinal magnetic field signal 303 and the transverse magnetic field signal 304, and the period corresponds to one click of the rotation operation member 260.

  That is, when the pulse signal 305 is monitored, it is possible to detect the rotation of the rotation operation member 260 for one click.

  As described above, in the rotation operation member of this embodiment, the pitch of the uneven shape 230f for causing the rotation operation member 260 to click is the same as the pitch of the magnetic poles of the magnet 251.

  Therefore, in a state where the rotation operation member 260 is rotated by one click, the longitudinal magnetic field signal 303 and the transverse magnetic field signal 304 change only for a half cycle, and it is possible to detect the rotation for one click with only one of the signals. Can not.

  If the magnetic pole pitch of the magnet 251 is half of the pitch of the uneven shape 230f, it is possible to change the longitudinal magnetic field signal 303 and the transverse magnetic field signal 304 by one cycle with one click.

  However, there is a lower limit on the width of the magnetic poles due to restrictions on the magnetization process, and an increase in the number of magnetic poles may lead to an increase in the size of the magnet.

  Therefore, by taking the exclusive OR of the longitudinal magnetic field signal 303 and the transverse magnetic field signal 304 as in the present embodiment, it becomes possible to generate a signal for one period even with the same magnetic pole pitch as one click. It becomes possible to prevent the enlargement.

  In addition, since the Hall IC 241 of the present embodiment can detect both the longitudinal and transverse magnetic fields with one element, it is possible to suppress the deviation of the longitudinal and transverse magnetic field signals.

  Although details will be described in the third embodiment, it is also possible to detect the magnetic field of the magnet 251 by using one Hall IC for detecting the longitudinal magnetic field and one for detecting the transverse magnetic field.

  In this case, however, the mutual positional relationship between the Hall ICs affects the detection performance, so that it is necessary to accurately arrange the two Hall ICs.

  In the configuration of the present embodiment, since the Hall IC capable of detecting a magnetic field in two directions is used, even if the relative position of the magnet and the Hall IC changes, the influence on the detection performance is small.

  For this reason, it is possible to provide a rotary operation member that is not easily affected by displacement of components due to a shift during assembly, external force, environmental temperature, or the like.

(Description of generation of rotation direction signal 306)
The rotation direction signal 306 in the lowermost part of FIG. 6A is a signal indicating the rotation direction of the rotation operation member 260, L indicates that the rotation operation member 260 rotates clockwise, and H indicates that it rotates counterclockwise. Represents.

  Hereinafter, details of generation of the rotation direction signal 306 will be described.

  FIG. 6B is a table showing possible values of the longitudinal magnetic field signal 303 and the transverse magnetic field signal 304. There are four possible states, from state 1 to state 4, depending on the combination of each signal (H, L).

  For example, the state 1 is between the rotation angle I and the rotation angle Ia.

  Since the transverse magnetic field signal 304 changes between the rotation angles Ia and Ib, the state 2 is established.

  Similarly, the state between Ib and IIa is in state 3, the state between IIa and IIb is in state 4, and the state returns to state 1 again between IIb and IIIa.

  That is, when the rotation operation member 260 is rotated clockwise, the combination of the longitudinal magnetic field signal 303 and the transverse magnetic field signal 304 changes in the order of state 1 → state 2 → state 3 → state 4 → state 1.

  Although details will be described later, when the rotation operation member 260 is rotated counterclockwise, the state changes in the order of state 1 → state 4 → state 3 → state 2 → state 1.

  Therefore, by monitoring changes in the longitudinal magnetic field signal 303 and the transverse magnetic field signal 304, it is possible to detect the rotation direction of the rotation operation member 260.

  The Hall IC 241 performs this processing internally and outputs the detected rotation direction as H (counterclockwise) and L (clockwise).

(Description of signal processing when rotating operation member 260 is rotated counterclockwise)
Next, signal processing in the case where the rotation operation member 260 is rotated counterclockwise will be described with reference to FIG.

  The same signals as those in FIG. 6A are denoted by the same reference numerals, and only portions different from those in FIG.

  FIG. 7 shows a state in which the rotation operation member 260 is rotated counterclockwise and is rotated from an arbitrary click position IV to I.

  Processing for generating the longitudinal magnetic field signal 303, the transverse magnetic field signal 304, and the pulse signal 305 from the longitudinal magnetic flux density 301 and the transverse magnetic flux density 302 is the same as that in the clockwise rotation.

  Next, consider the combined state of the longitudinal magnetic field signal 303 and the transverse magnetic field signal 304 as in FIG. Between the angles IV and IVa, the (longitudinal magnetic field signal 303, transverse magnetic field signal 304) is (L, H) and is in state 2.

  Since the interval between IVa and IVb is (L, L), state 1 is entered.

  Hereinafter, state 4 is between IVb and IIIa, state 3 is between IIIa and IIIb, and state 2 is between IIIb and IIa. That is, the state changes in the order of state 2 → state 1 → state 4 → state 3 → state 2 according to the rotation of the rotation operation member 260.

  Thus, as described above, since it can be seen that the rotation operation member 260 is rotating counterclockwise, the Hall IC 241 outputs H (counterclockwise) as the rotation direction signal 306.

(Description of signal processing method for rotation detection control)
Next, a signal processing method for performing rotation detection control of the rotation operation member 260 from the pulse signal 305 and the rotation direction signal 306 will be described with reference to FIGS.

  FIG. 8A shows the longitudinal and transverse magnetic flux density when the rotation operation member 260 is rotated clockwise from the rotation angle I to the rotation angle III by two clicks, then rotated counterclockwise by two clicks, and returned to the angle I. And various signals.

  FIG. 8B is a flowchart showing a rotation detection process performed by the CPU 150 in response to the pulse signal 305 and the rotation direction signal 306.

  In the signal processing in the present embodiment, switching between the rising edge and the falling edge of the pulse signal 305 is switched according to the output of the rotation direction signal 306.

  Specifically, when the rotation direction signal 306 is L (clockwise), the rotation operation member 260 is rotated at the timing of the rising edges (305a1, 305a2, 305a3) shown in the drawing.

  When the rotation direction signal 306 is H (counterclockwise), rotation processing is performed at the timing of the falling edges (305b1, 305b2, 305b3, 305b4).

  Hereinafter, it demonstrates along the rotation angle of Fig.8 (a).

  In the case of moving one click clockwise from the rotation angle I to the rotation angle II, the rotation direction signal 306 is L representing clockwise rotation.

  For this reason, nothing happens at the timing of the falling edge 305b1 of the pulse signal 305. When the rotation operation member 260 rotates from this state, the rotation angle Ic exceeds the protrusion 230h of the uneven shape 230f.

  When the rotation operation member 260 continues to rotate and the rising edge 305a1 of the pulse signal 305 arrives, the CPU 150 determines that the rotation operation member 260 has rotated by one click, and performs a predetermined operation such as a setting change of the imaging device 100. Do.

  Then, when the ball member 211 is rotated again to the state of the rotation angle II where it comes into contact with the recess 230g, the operation for one click is completed. The same processing is performed for the operation for one click from the rotation angle II to the rotation angle III.

  Next, the case where the rotation operation member 260 is reversed counterclockwise at the rotation angle III will be described. As described above, when a user performs a dial operation, an operation for each click is fundamental.

  Therefore, it is assumed that a reversing operation from the click position as indicated by the rotation angle III is frequently used.

  At this time, the longitudinal magnetic flux density 301 and the transverse magnetic flux density 302 are symmetrical with respect to the rotation angle III.

  In one click from the rotation angle III to II, the rising edge and the falling edge do not appear in the pulse signal 305 until the rotation angle IIIc that gets over the convex portion 230h of the uneven shape 230f.

  This is because the transverse magnetic field signal 304 does not change because the transverse magnetic flux density 302 does not fall below the lower threshold value 307b.

  After exceeding the rotation angle IIIc, the longitudinal magnetic field signal 303 changes from L to H at the sampling of the rotation angle IIIb after the longitudinal magnetic flux density 301 falls below the lower threshold value 307b, and the falling edge 305b3 is added to the pulse signal 305. appear.

  Since the combination state of the longitudinal magnetic field signal 303 and the transverse magnetic field signal 304 changes at the same timing, the rotation direction signal 306 also changes from L to H.

  When the rotation direction signal 306 is H, the rotation processing is performed at the falling edge of the pulse signal 305, so the CPU 150 recognizes the above-described falling edge 305b3 and performs the rotation processing.

  Thereafter, the rotation angle II at which the ball member 211 comes into contact with the recess 230g is reached, and the first click reversed in the counterclockwise direction is completed.

  The same process is performed for one counterclockwise rotation from the rotation angle II to the rotation angle I.

  In the process from the rotation angle III to II, when control is performed using only the rising edge of the pulse signal 305 as in the clockwise direction, there is no rising edge between the rotation angles III and II.

  The CPU 150 is a calculation unit that calculates the rotation amount and the rotation direction of the rotation operation member 260 in accordance with the change amount of the magnetic field in a predetermined direction generated by the magnetic field detection unit 241.

  Therefore, the CPU 150 cannot recognize the rotation operation. That is, the rotation of the first click during the reversing operation is not detected, and the rotation operation intended by the user is not executed.

  Further, as shown by the rising edge 305a3, the rising edge in the counterclockwise direction appears between the rotation angle II and the rotation angle IIc.

  Consider a case where the user operates the rotation operation member 260.

  A state where the rotation operation member 260 is rotated against the urging force of the spring member 212 and a state where the ball member 211 gets over the convex portion 230h and the dial is urged in the rotation direction by the urging force of the spring are repeated.

  The state in which the rotation operation member 260 is rotated against the urging force of the spring member 212 corresponds to, for example, rotation angles II to IIc.

  The state in which the ball member 211 gets over the convex portion 230h and the dial is urged in the rotation direction by the urging force of the spring corresponds to, for example, rotation angles IIc to III.

  For this reason, the edge of the signal for generating the rotation operation for one click is the state after the user rotates the rotation operation member 260 with the will and the ball member 211 has passed over the convex portion 230h, that is, the rotation angle IIc. Appears between 1 and III.

  This is because if the rotation process is performed between the rotation angles II and IIc as described above, the rotation operation may be performed at an unexpected timing by the user due to the backlash of the rotation operation member 260 or the like.

  In the configuration in which only one of the rising edge and the falling edge is always detected, the edge of the pulse signal 305 appears before the ball member 211 gets over the convex portion 230h by either clockwise or counterclockwise rotation.

  Therefore, it is not possible to realize control for detecting rotation after the ball member 211 has passed over the convex portion 230h.

  In this way, by performing control to switch the edge used by the pulse signal 305 in accordance with the value of the rotation direction signal 306, it is possible to prevent an operation failure at the first click during the reversal operation.

  Further, since it becomes possible to detect rotation after the ball member 211 has passed over the convex portion 230h regardless of the rotation direction, it is possible to provide a rotation operation member that is less likely to malfunction and responds faithfully to the user's will. It becomes possible.

  Further, even when the ball member 211 is reversed while the ball member 211 is over the convex portion 230h, the above-described control can be performed to prevent a malfunction and perform a rotating operation reflecting the user's will. Is possible.

(Description of flowchart of control of rotation operation of CPU 150)
FIG. 8B is a flowchart showing the control described above. The actual movement of the CPU 150 will be described below along the flowchart.

  When the rising edge and falling edge of the pulse signal 305 are generated, an interrupt is generated in the CPU 150. This is S100.

  Next, in S101, it is determined whether or not the pulse signal 305 is H. If the pulse signal 305 is H, the process proceeds to S102, and it is determined whether the rotation direction signal 306 is L.

  When the rotation direction signal 306 is L, the process proceeds to S103, and the rotation operation member 260 performs the process of rotating one click in the clockwise direction.

  Then, the process proceeds to S104, and the interrupt process ends. When the rotation direction signal 306 is not L in S102 (when the rotation direction signal 306 is H), the process proceeds to S104 without performing any processing.

  If the pulse signal 305 is not H in S101 (the pulse signal 305 is L), the process proceeds to S111 and it is determined whether or not the rotation direction signal 306 is H.

  If the rotation direction signal 306 is H, the process proceeds to S112, where a process of rotating one click counterclockwise is performed, and the interrupt process is terminated in S104.

  If the rotation direction signal 306 is not H in S111 (the rotation direction signal 306 is L), the process proceeds to S104 without performing any process, and the interrupt process is terminated.

  When this flowchart is compared with the signal waveform of FIG.

  The interrupt generated at the falling edge 305b1 is NO in S101 and NO in S111, and no processing is executed by passing through the route [4].

  The interrupt generated at the rising edge 305a1 is YES in S101 and S102 is also YES, and the rotation process for one click is executed in the clockwise direction by passing through the route [1].

  Similarly, in the interruption of the falling edge 305b3, NO is determined in S101, YES is determined in S111, and processing of one click is executed counterclockwise by passing through the route [3].

  In the interrupt of the rising edge 305a3, S101 is YES and S102 is NO, and no processing is performed because the route of [2] is passed.

  As described above, by performing the processing according to the flowchart of FIG. 8B, the rotation detection control that reflects the user's intention without causing any malfunction regardless of the rotation direction of the rotation operation member 260. Can be performed.

(Mixed iron magnetic material)
Hereinafter, with reference to FIG. 9, a description will be given of the change in magnetic field during dial rotation and the effect on the output signal of the Hall IC 241 when a magnetic material such as iron sand is mixed between the rotation operation member 260 and the base member 210. To do.

  Here, for comparison with the present embodiment, a case will be described in which the rotation operation member 260 is not provided with the protrusion 201 or the groove 202.

  FIG. 9A is a cross-sectional view connecting the rotation center of the rotation operation member 260 and the Hall IC 241 when the sand iron 500 mixed from the outside of the rotation operation member 260 is attracted by the magnetic field of the magnet 251.

  FIG. 9B is an enlarged view of the vicinity of the Hall IC 241 when the magnet 251 is viewed from the direction orthogonal to the dial rotation axis when the sand iron 500 is mixed inside the rotation operation member 260.

  As shown in FIG. 9B, the sand iron 500 mixed between the rotation operation member 260 and the base member 210 adheres to the rotation operation member 260 in the region of the magnetic field generated from the magnetized surface 251a of the magnet 251. .

  The rotary dial 200 provided in the imaging apparatus 100 of the present embodiment has a configuration in which only a part of the rotary dial 200 is exposed from the imaging apparatus 100.

  Therefore, it is difficult to remove dust once mixed in the gap between the imaging device 100 and the rotary dial 200.

  In particular, it is difficult to remove the iron sand 500 that is attracted by the magnet 251.

  For this reason, the iron sand 500 may be stacked on the rotary operation member 260 in the vicinity of the magnetized surface 251a of the magnet 251.

  Sand iron 500 attached to rotation operation member 260 shields the magnetic field generated from magnet 251.

  Therefore, depending on the amount of laminated iron sand 500, the longitudinal magnetic field 253a and the transverse magnetic field 253b detected by the detection unit 241a of the Hall IC 241 may be weakened.

  As a result, the magnetic flux density waveform shown in FIGS. 6, 7, and 8 changes for each rotation phase of the rotary dial 200, which may cause the rotation operation to become ineffective or malfunction.

(Method of reducing the amount of iron 500)
Hereinafter, a method for reducing the amount of iron sand 500 adhering to the detection axis of the Hall IC 241 will be described with reference to FIG.

  FIG. 10A is a cross-sectional view connecting the rotation center of the rotary operation member 260 and the mixing direction of the iron sand 500 (arrow D direction).

  10B is an enlarged view of the vicinity of the Hall IC 241 when the magnet 251 is viewed from the direction orthogonal to the dial rotation axis when the sand iron 500 is mixed in the rotation operation member 260. FIG.

  FIG. 10C is an enlarged view of FIG.

  FIG. 10D is a perspective view of the rotary operation member 260 taken along a cross section passing through the rotation axis center.

  Reference numeral 201 denotes a protrusion, which is provided integrally with the rotation operation member 260.

  By providing the apex 201 c of the protrusion 201 on the detection axis (axis E) of the Hall IC 241, the iron sand 500 attached on the outer gradient 201 b receives an attractive force 255 from the direction of the magnet 251.

  The attractive force 255 acting on the iron sand 500 can be represented by components of a component force 255a in the parallel direction of the slope and a component force 255b in the direction perpendicular to the slope on the outer gradient 201a.

  The iron sand 500 moves in a direction away from the apex 201c of the projection 201 by the component force 255a in the parallel direction of the slope.

  The protrusion 201 is a tapered protrusion that tapers from the rotation operation member 260 toward the Hall IC 251.

  That is, the protrusion 201 is a tapered protrusion that tapers in the direction of the detection axis E.

  In FIG. 4C, the protrusion 201 has a tapered shape having a vertex 201 c on the detection axis (axis E) of the Hall IC 241.

  In FIG.4 (d), as for the protrusion part 201, the cone shape which has the vertex 201c is mentioned as an example.

  In addition, the specific shape of the protrusion 201 will be described with reference to the perspective view of FIG.

  FIGS. 13A, 13C, and 13E show cross sections of the protrusions 201, and are examples of specific shapes.

  FIG. 13B is a perspective view when the rotary operation member 260 having the shape of the protrusion 201 in FIG.

  FIG. 13D is a perspective view when the rotary operation member 260 having the shape of the protrusion 201 in FIG.

  FIG. 13F is a perspective view when the rotary operation member 260 having the shape of the protruding portion 201 in FIG.

  As shown in FIG. 13, the protrusion 201 has a vertex 201 c, and a similar effect can be obtained by providing a tapered shape that tapers in the direction of the detection axis E.

  The protrusion 201 shown in FIG. 13 may be created by injection molding, cutting, or the like, and by using the shape shown in this configuration, the same effect can be obtained regardless of the manufacturing method.

  With this configuration, the iron sand 500 receives the attractive force 255 from the magnet 251 in the direction away from the detection axis (axis E) of the Hall IC 241, thereby reducing the amount of the iron sand 500 adhering to the apex 201 c.

  Further, by providing the apex 201c of the protrusion 201 on the detection axis (axis E), even when a large amount of magnetic material such as iron sand is mixed between the rotation operation member 260 and the base member 210, The layer can be thinned.

  Here, the iron sand 500 attached on the outer gradient 201a has been described.

  Further, when the sand iron 500 gets over the outer gradient 201a and adheres to the inner gradient 201b, the attractive force 255 by the magnet 251 and the component force in the parallel direction of the slope according to the shape of the inner gradient 201b act on the iron iron 500. The effect is obtained.

  A groove 202 is provided outside the rotation axis with respect to the position of the outer gradient 201a and in a magnetic field generated by the magnet 251.

  The iron sand 500 mixed in from the direction of the arrow D reaches the vicinity of the groove 202, and then receives an attractive force at a position closest to the magnetized surface 251a of the magnet 251.

  Therefore, the iron sand 500 receives a strong attractive force 255 at the groove 202, and the iron sand 500 is laminated so as to fill the groove 202.

  By providing the groove portion 202 in the rotation operation member 260, the mixed iron sand 500 is stacked on the groove portion 202.

  For this reason, it becomes difficult to see the iron sand 500 from the outside of the imaging apparatus 100, and it becomes possible to reduce the deterioration of quality.

  Further, by enlarging the groove portion, a large amount of magnetic material such as iron sand can be drawn into the groove portion 202.

  The groove portion 202 is formed in a region where the rotary dial 260 as the rotation operation member and the base member 210 face each other.

  The groove 202 is formed outside the protrusion 201 with respect to the central axis of the rotation operation member 260.

  The groove portion 202 is formed in a magnetic field region generated from the magnet 251 as a magnetic field generating member.

  The rotary dial 200 in the present invention may be configured not to generate a click feeling during a rotation operation.

  Also in this case, the same effect can be obtained by adopting the same configuration as that of the rotation operation member 260 and the base member 210 described above.

  With the above configuration, the protrusion 201 and the groove 202 are provided on the rotation operation member 260, so that the amount of sand iron 500 mixed from the outside of the rotation operation member 260 adheres to the detection axis of the Hall IC 241 can be reduced.

  Therefore, it becomes possible to reduce the occurrence of malfunctions and the ineffective rotation operation.

  Moreover, the same effect is acquired also with respect to the foreign material of magnetic bodies other than the sand iron 500. FIG.

(Second embodiment)
Next, a second form of the present embodiment will be described with reference to FIG.

  The same contents as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In this example, only the arrangement of the protrusions 201 is different from that of the first embodiment.

  FIG. 11A is a cross-sectional view connecting the rotation center of the rotation operation member 260 and the Hall IC 241 when the protrusion 201 is provided on the base member 210.

  FIG. 11B is an enlarged view of the vicinity of the Hall IC 241 when the magnet 251 is viewed from the direction orthogonal to the dial rotation axis when the sand iron 500 is mixed inside the rotation operation member 260.

  As illustrated in FIG. 11B, the protrusion 201 is provided on the base member 210 side at a position on the detection axis of the Hall IC 241.

  With this configuration, the gap between the protruding portion 201 and the rotation operation member 260 is narrowed, and the amount of iron sand 500 existing on the detection axis of the Hall IC 241 can be reduced.

  In the configuration of FIG. 11B, the protrusion 201 may be provided only near the detection axis of the Hall IC 241 fixed to the base member 210.

  In this case, due to the rotation operation of the rotation operation member 260, the iron sand 500 attached to the rotation operation member 260 moves on the rotation operation member 260 so as to follow the shape of the protrusion 201.

  Therefore, it is possible to reduce the amount of iron sand 500 located on the detection axis (axis E) of the Hall IC 241.

  With the above configuration, the amount of sand iron 500 mixed from the outside of the rotation operation member 260 adheres to the detection axis of the Hall IC 241 can be reduced.

  Therefore, even if sand iron adheres to the vicinity of the rotating magnet, the rotating operation does not work. Alternatively, rotation detection can be performed so that no malfunction occurs.

  Here, the rotation operation member 260 provided on the upper surface cover 110 of the imaging apparatus 100 has been described. However, the present invention is not limited to this, and the rotation operation member such as the dial 71 shown in FIG. It is also applicable to.

  The Hall IC 241 described in the configuration of the present embodiment is a magnetic sensor IC including a transverse magnetic field detection unit 122 that can detect a magnetic field in a specific direction and a vertical magnetic field detection unit 121 that can detect a magnetic field in a direction perpendicular thereto. It was.

  However, the same effect can be obtained even when a magnetic sensor IC capable of detecting a magnetic field in only one direction is used.

(Third embodiment)
Next, a third form of the present embodiment will be described with reference to FIG.

  The rotation operation member 260 in the present invention may be, for example, the rotation ring 402 disposed around the lens barrel 401 of the camera 400 shown in FIG.

  The user can arbitrarily assign a function to the rotation ring 402 of the camera 400, and each function can be operated according to the amount and direction of rotation of the rotation ring 402.

  The arbitrary function here indicates a zoom function, a focusing function, or the like for assisting shooting.

  Similarly to the configuration of the rotation operation member 260 described above, a magnet 251 (not shown) is held on the rotation ring 402 side inside the rotation ring 402, and the rotation ring 402 and the magnet 251 are integrated or interlocked. Rotate.

  The rotating ring 402 has a click mechanism, and the rotating operation of the rotating ring 402 is performed with one click as a basic unit.

  Further, the hall IC 241 (not shown) is fixed to the camera 400 side so as to be in a position facing the magnet 251.

  Also in this case, in the same manner as the configuration of the rotation operation member 260 described above, the configuration in which the protrusion 201 is provided between the Hall IC 241 and the magnet 251 on the detection axis of the Hall IC 241 is shown in FIG. The same effect as described can be obtained.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

260 Rotation operation member 201 Projection part 202 Groove part 241 Hall IC
251 Magnet 301 Vertical magnetic flux density 302 Transverse magnetic flux density

Claims (3)

A rotation operation member held rotatably with respect to the rotation axis; a magnetic field generation member whose magnetic poles change at a predetermined pitch as the rotation operation member rotates; and a magnetic field detection unit capable of detecting a magnetic field in a predetermined direction An electron having calculation means for calculating a rotation amount and a rotation direction of the rotation operation member in accordance with a change amount of the magnetic field in a predetermined direction generated by the magnetic field detection unit, and a base member holding the magnetic field detection unit Equipment,
The region where the magnetic field detector and the rotation operation member face each other is separated by a predetermined interval,
In a region where the magnetic field detection unit and the rotation operation member face each other, at least one of the rotation operation member and the base member is formed with a tapered protrusion extending in the detection axis direction of the magnetic field detection unit. Electronic equipment characterized by   The electronic apparatus according to claim 1, wherein a vertex of the protrusion is provided on a detection axis of the magnetic field detection unit. A groove is provided in the rotation operation member,
The groove is formed in a region where the rotation operation member and the base member face each other, and the groove is formed outside the projection with respect to a central axis of the rotation operation member, and The electronic device according to claim 1, wherein the groove portion is formed in a magnetic field region generated from the magnetic field generating member.

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