JPH09243399A - Magnetic angle detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely detect the touch of the finger of a person by a touch sensor by providing an opened groove in a position opposed to a magnetic code extended in the axial direction on the side plate inside of an equipment body and provided on an operating shaft, and fitting and fixing a magnetic detecting means to this groove. SOLUTION: A magnetic encoder part 20 is formed of a synthetic resin-made equipment body 23, a magnetic body 24, and a Hall IC 25 formed of a magnetic detecting device. A touch sensor part 21 is formed in a hollow part 26b enclosed by an annular protruding part 26a on the upper surface of a synthetic resin-made equipment body 26. A push switch part 22 is integrated with a recessed part 26c formed on the lower surface of the equipment body 26 by a metal fitting, and mounted on the equipment body 26. When the handle 10 of an operating shaft 8 is pressed down, the operating shaft 8 is lowered to push down a movable contact 13, and the movable contact 13 makes contact with a fixed contact 14 to lay the switch into ON state. These encoder part 20, touch sensor part 21 and switch part 22 are laminated and integrated together by a check plate 30.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic angle detection device for detecting a change in vertical magnetic field by a Hall IC to generate a pulse signal and detecting the rotation angle of an operating shaft from the number of generated signals.

[0001]

2. Description of the Related Art As a conventional magnetic angle detection device, for example, a touch for operating a magnetic encoder section and a push switch section on a common operation axis and detecting that the operator's finger or the like touches the operation axis. The present applicant has proposed a magnetic angle detection device with a sensor unit. Such a conventional magnetic angle detection device will be described with reference to FIGS. FIG. 7 mainly includes a magnetic encoder unit 1, a touch sensor unit 2 for detecting that the operator's finger or the like has touched, and a push switch unit 3.

The magnetic encoder unit 1 has a housing 4 made of synthetic resin, and a bearing 4a is formed in a protruding manner at the center of the upper surface of the housing 4. Inside the housing 4, a magnetic body 5 is formed with a spring member 6 attached to the upper surface thereof, and is rotatably supported by an operation shaft 8 to be described later. The spring member 6 is in contact with the upper surface of the inside of the housing 4 so that a click feeling and a rotational torque are exerted on the operation shaft 8. Also,
The magnetic body 5 is formed into a disc shape by molding using a plastic magnet (plamag), and has an N-shaped outer peripheral surface.
A plurality of vertical magnetic fields of poles and S poles are alternately magnetized with a predetermined number of poles. The Hall element 7 that faces the outer peripheral surface of the magnetic body 5 with a predetermined gap A is attached to the inner peripheral wall of the housing 1 with an adhesive or the like to form the magnetic encoder unit 1. In addition, in the central portion of the upper surface of the magnetic body 5,
The bearing 5a is formed to project. The bearing 5a of the magnetic body 5 is rotatably supported inside the bearing 4a of the housing 4.

An operating shaft 8 is rotatably inserted into and rotatably supported by the bearing 4a of the housing 4, and is also rotatably supported in the axial direction thereof. Further, since the bearing 5a of the magnetic body 5 and the fitting portion of the operating shaft 8 are formed in an oval shape, the operating shaft 8 can freely reciprocate, and the magnetic body 5 follows the rotation of the operating shaft 8. Then it is designed to rotate. The operating shaft 8 is made of a conductive metal such as aluminum, and the rear end portion 8b of the operating shaft 8 is pushed upward by the elastic force of a rubber spring 12 of the push switch portion 3 described later. Further, the elastic force of the rubber spring 12 prevents the operating shaft 8 from coming off from the housing 4 by the wire spring 9 and the bearing 4a. Also, the housing 4
A conductive metal knob 10 made of aluminum or the like is fixedly attached to the tip 8a of the operation shaft 8 on the outside with a set screw (not shown) or the like. Then, the hollow portion 11b of the housing 11
The contact piece 2a of the touch sensor unit 2 comes into contact with the rear end 8b of the operation shaft 8 located at the position to establish electrical conduction. As shown in FIG. 8, the contact piece 2a is electrically connected by sandwiching the outer periphery of the rear end 8b of the operating shaft 8 with the two contact pieces 2a.
The contact piece 2a is made of a material such as phosphor bronze which is curved and has a spring property, and is integrally formed with the touch sensor terminal 2b. The rear end 8b of the operating shaft 8 is in contact with the contact portion 2c of the contact piece 2a so as to be rotatable and reciprocally movable in the axial direction, and the operator's finger or the like touches the operating shaft 8. Can be detected.

Next, in the push switch section 3, a housing 11 made of synthetic resin is formed, and an annular projecting portion 11a is provided on the upper surface of the housing 11 to form a hollow portion 11b. Then, the push switch portion 3 is housed in the concave portion provided on the lower side of the hollow portion 11b. The push switch unit 3 includes a rubber spring 12, a movable contact 13, a fixed contact 14, and the like.
When the operating shaft 8 is pushed down with a finger or the like, the rear end 8b of the operating shaft 8 pushes the top of the rubber spring 12 to deform the rubber spring 12. The deformation of the rubber spring 12 causes the top of the rubber spring 12 to move to the movable contact 1.
Push 3 down. In this way, when the movable contact 13 is pushed down by the rear end 8b of the operating shaft 8, the movable contact 13
Comes into contact with the fixed contact 14 and is switched on. Next, when the pressing force of the finger or the like applied to the operation shaft 8 is released, the elastic force of the rubber spring 12 exerts a restoring force to operate the operation shaft 8.
Is pushed upward, and the movable contact 13 moves to the fixed contact 14
It is configured to be switched off apart from.
In the magnetic angle detection device having such a configuration, the magnetic encoder unit 1, the touch sensor unit 2, and the push switch unit 3 are laminated and integrated by the stop plate 15. The stopper plate 15 is formed of a metal plate or the like, and a leg portion (not shown) extends to the upper surface of the housing 4, and is formed to project from the upper surface.
11, the magnetic encoder unit 1, the touch sensor unit 2, and the push switch unit 3 are integrated.

The magnetic encoder unit 1 of the conventional magnetic type angle detecting device configured as described above changes the vertical components of a plurality of magnetic fields generated on the outer circumference of the disk-shaped magnetic body 5 by the rotation of the operating shaft 8. Hall IC7 detects the
The pulse signal is output from C7 to the outside. The output of this pulse signal is output from the Hall IC 7 in conjunction with the click feeling generated by the spring member 6, and the rotation angle of the operating shaft 8 is detected by the number of this pulse signal.
In order for the Hall IC 7 to reliably generate the pulse signal, the position at which the Hall IC 7 is fixed to the housing 4 should be set to a predetermined position without variation, and the change in the magnetic field of the magnetic body 5 should be accurately detected. I won't. However, in the conventional magnetic angle detection device, the Hall IC 7 is fixed to the housing 4 by slightly moving the Hall IC 7 while searching for the peak position of the vertical magnetic field of the magnetic body 5 and arranging the Hall I at that position.
C7 was fixed while being finely adjusted with an adhesive or the like. Therefore, it takes time to determine the position in the circumferential direction or the vertical direction, and it is difficult to fix the position accurately. Further, the size of the gap A could not be determined because an adhesive material or the like entered between the inner surface of the housing 4 and the Hall IC 7.

Therefore, in the conventional magnetic angle detecting device, the magnetic substance 5 is moved from the magnetic substance 5 due to the positional deviation of the Hall IC 7 in the circumferential direction and the dimensional variation of the gap A between the outer peripheral surface of the magnetic substance 5 and the Hall IC 7. The detection accuracy of the change in the vertical component of the generated magnetic field is lowered, and even if the operating shaft 8 is rotated, it is not possible to generate an accurate pulse signal from the Hall IC 7 in conjunction with the click feeling, and thus the operating shaft 2 There was a problem that the proper rotation angle of could not be detected.

Further, in the touch sensor section 2, the contact piece 2a of the sensor terminal 2b is rotatably and reciprocally held between the contact piece 2a and the outer periphery of the tip 8b of the operation shaft 8 as described above. Since it is processed by a press or the like, the pressure contact force to the operating shaft 8 varies due to the dimensional variation between the two contact pieces 2a, and the electrical connection with the operating shaft 8 becomes unstable. Further, since the two contact pieces 2a press and hold the rear end 8b of the operating shaft 8, the knob 10 of the operating shaft 8 is pressed to reciprocally move the operating shaft 8 up and down to push the switch. When the portion 3 is operated, the contact piece 2a also has a force to move following the up and down reciprocating movement of the operation shaft 8, the contact state of the contact portion 2c becomes unstable, and the operator's finger or the like touches it. There is a problem that the function of the touch sensor unit 2 that detects the fact becomes unstable.

[0008]

According to the conventional magnetic angle detection device, the Hall IC 7 must be positioned at the peak of the vertical magnetic field generated from the magnetic body 5, so that the Hall IC 7 can be made minute. The position of the peak of the vertical magnetic field was searched for while moving, and the Hall IC 7 was fixed at that position with an adhesive or the like. Therefore, it took time to fix the Hall IC 7. In addition, since the Hall IC 7 is manually positioned, the positioning accuracy varies, and the pulse signal generated from the Hall IC 7 and the operation shaft 8
Due to the click feeling transmitted to the magnetic body 5, and the dimensional variation of the gap A between the magnetic body 5 and the Hall IC 7, the accuracy of detecting the change in the vertical component of the magnetic field generated from the magnetic body 5 decreases. In conjunction with the click feeling of the operation axis 8,
There is a problem that an appropriate pulse signal cannot be generated from the Hall IC 7 and an appropriate rotation angle of the operation shaft 7 cannot be detected. Further, in the touch sensor unit 2, since the rear end 8b of the operation shaft 8 is sandwiched by the two contact pieces 2a in pressure contact, the operation shaft 8 is reciprocally moved up and down,
When the push switch section 3 is operated, the contact piece 2a also has a force to move following the up and down reciprocating movement of the operation shaft 8, and the contact state of the contact point section 2c becomes unstable. There is a problem in that the operation of the touch sensor unit 2 that detects that the user touches becomes unstable. Therefore, in the magnetic angle detection device of the present invention, the Hall IC 7 can be fixed at a fixed position at all times, and the touch sensor can reliably detect the touch of a human finger or the like. An object is to provide a highly accurate magnetic angle detection device.

[0009]

As a first means for solving the above-mentioned problems, the magnetic angle detecting device of the present invention is
A casing, a manipulation shaft rotatably supported on the casing, a magnetic cord provided on the manipulation shaft, and a magnetic detection unit attached to the casing, and a shaft inside a side plate of the casing. A groove extending in the direction and opened at a position facing the magnetic cord is provided, and the magnetic detection means is fitted and fixed in the groove. Further, as a second means for solving the above-mentioned problems, a magnetic body forming the magnetic cord and a regulating portion for regulating the horizontal movement of the magnetic body are provided, and the magnetic cord is provided on the peripheral surface of the magnetic body. In addition to the above, the restriction portion is provided on the housing and the magnetic body. In addition, as a third means for solving the above-mentioned problems, the magnetic field strength of the magnetic cord is set to be the same in the axial direction. In addition, as a fourth means for solving the above-mentioned problems, the groove of the casing has a wedge-shaped horizontal cross-sectional shape, and the width of the wedge-shaped opening side is narrower than the internal width. Further, as a fifth means for solving the above problems, a casing, an operation shaft rotatably and reciprocally supported by the casing, and a coil spring arranged on the rear end side of the operation shaft are provided. The coil spring is used to detect the continuity of the touch sensor unit and to reciprocate the operation shaft in the axial direction. Further, as a sixth means for solving the above-mentioned problems, the coil spring has a truncated cone shape.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the magnetic angle detecting device of the present invention will be described below with reference to FIGS. Further, the same members as the conventional ones are indicated by the same reference numerals. FIG. 1 mainly includes a magnetic encoder unit 20, a touch sensor unit 21 for detecting that the operator's finger or the like has touched, and a push switch unit 22.

The magnetic encoder section 20 comprises a housing 23 made of synthetic resin, a magnetic body 24, and a Hall IC 25 composed of a magnetic detection device. The housing 23 is shown in FIG.
As shown in FIG. 2, a side plate 23a for closing the upper part and a cylindrical side plate 23e are formed on the outer peripheral side of the side plate 23a, and a bearing 23b is projectingly formed at the outer central portion of the side plate 23a. 8 is fitted to be rotatable and reciprocally movable. An uneven surface 23c and a flat surface 23d are formed on the inner surface of the side plate 23a. In addition, a wedge-shaped Hall IC fitting groove 23f is provided at a predetermined depth inside the cylindrical side plate 23e that covers the outer periphery of the housing 23 at a predetermined depth in the axial direction. And this Hall IC fitting groove 23
The f is formed in a wedge shape in which an opening 23j is provided in the axial direction of the surface facing the outer peripheral surface of the magnetic body 24 and the width of the opening 23j is narrower than the inner width. Further, the Hall IC fitting groove 23f is chamfered at the corners around the entrance into which the Hall IC is inserted.
In order to reduce the resistance when inserting 25, a recess 23g is provided in the flat wall.

The magnetic material 24 is made of plastic.
A magnet (plamag) is formed into a disc shape by molding, and a magnetic code is attached to the outer peripheral side surface in a range in which a plurality of magnetic poles of N pole and S pole alternately reach a predetermined number of poles from the upper surface to the lower surface. It is magnetized. Further, the magnetic cords on the outer peripheral side surface of the magnetic body 24 are magnetized so as to have the same magnetic field strength on the line in the axial direction. Further, a restricting portion that restricts the horizontal movement of the magnetic body 24 is formed in the housing 23 and the magnetic body 24. In this restricting portion, a bearing 24b is formed so as to project from the center of the upper surface of the magnetic body 24, and the bearing 24b is rotatably supported in the hollow interior of the bearing 23b of the housing 23 without backlash. Thus, the horizontal movement of the magnetic body 24 is restricted. Further, the spring member 6 is attached to the upper surface of the magnetic body 24 so as to form spring portions 6a and 6b. The spring portion 6a is formed on the uneven surface 23 of the housing.
The spring portion 6b contacts the flat surface 23d of the housing to generate a rotational torque when it contacts with c to generate a click feeling. A predetermined gap B is formed on the outer peripheral surface of the magnetic body 24.
The Hall IC 25 is inserted into the wedge-shaped Hall IC fitting groove 23f of the housing 23 and positioned therein. The Hall IC 25 is fixed to the housing by press-fitting it in the Hall IC fitting groove 23f or by pressing it by a housing 26 constituting the push switch section 22 described later. Also, in the magnetic body 24, the two spring portions 6a and 6b of the spring member 6 are pressed against the concave-convex surface 23c and the flat surface 23d of the housing 23 by the housing 26 described later,
By the action of the spring member 6, the magnetic encoder unit 20 of the present invention is configured to generate a click feeling and a rotation torque.

The operation shaft 8 is inserted and supported by the bearing 23b of the housing 23 and the bearing 24a of the magnetic body 24. The bearing 23b and the operating shaft 8 are rotatably inserted and are axially supported so as to be reciprocally movable in the axial direction. Further, the fitting portion between the bearing 24a of the magnetic body 24 and the operating shaft 8 is formed in an oval shape, so that the operating shaft 8 can freely reciprocate, and the magnetic body 24 can be operated by the operating shaft 8
It is designed to follow the rotation of. The operating shaft 8 is made of non-magnetic and conductive metal such as aluminum, and is constantly pushed upward by the elastic force of the touch sensor spring 27 and the rubber spring 12 of the push switch portion 22, which will be described later. . Further, the operation shaft 8 is the housing 2
The wire spring 9 and the bearing 23a prevent the wire 3 from slipping out and are axially supported by the bearing 23b. Further, a conductive metal knob 10 such as aluminum is fixedly attached to a tip 8a of the operation shaft 8 protruding from the housing by a set screw (not shown) or the like. Further, the rear end 8b of the operation shaft 8 has a hollow portion 2 formed in a housing 26 that constitutes a touch sensor portion 21 and a push switch portion 22, which will be described later.
It penetrates 6b and is in contact with the top of the rubber spring 12.

The touch sensor portion 21 is formed inside a hollow portion 26b surrounded by an annular protruding portion 26a on the upper surface of a housing 26 made of synthetic resin or the like. A metal washer 28 is inserted into the rear end 8b of the operating shaft 8 in the hollow portion 26b, and the outer diameter of the touch sensor spring 27 made of a truncated cone coil spring shown in FIG. 5 is small. The upper spring 27a on one side contacts the washer 28 and is electrically conducted. Further, the lower spring 27b of the touch sensor spring 27 is placed on the flat surface of the metal conduction terminal 29, and the outer diameter of the lower surface 27b thereof is guided by the hollow portion 26b of the housing 26 so that the lower spring 27b is not exposed to the outside. The touch sensor spring 27 and the conduction terminal 29 are prevented from becoming unstable in contact with each other even if vibrations of the above are applied.

Next, in the push switch section 22, a recess 26c is formed on the lower surface of the housing 26, and the recess 26c is formed.
It is integrally attached to the housing 26 by a metal fitting (not shown). This push switch section 22
Is a rubber spring 12, a movable contact 13, a fixed contact 14
Etc. are built in. When the knob 10 of the operating shaft 8 is pushed downward, the operating shaft 8 is lowered, and the rear end 8b of the operating shaft 8 deforms the rubber spring 12 and pushes down the movable contact 13. Then, the movable contact 13 comes into contact with the fixed contact 14 to be switched on. Next, when the pressing force of the operating shaft 8 is released, the movable contact 1
3 is configured to be separated from the fixed contact 14 and switch off. The magnetic encoder unit 20, the touch sensor unit 21, and the push switch unit 22 having such a configuration are stacked and integrated by the stopper plate 30,
The magnetic angle detection device of the present invention is configured.

Next, the assembly of the magnetic angle detecting device of the present invention will be described. First, in FIG. 1, the tip 8a of the operating shaft 8 is fixed to a jig (not shown) in an inverted state of FIG. The hole of the bearing 23b of the housing 23 is passed through the operation shaft 8. After that, the wire spring 9 is inserted into the groove portion of the operation shaft 8 by a jig (not shown), and the operation shaft 8 is inserted into the bearing 23 of the housing 23.
It is retained from b. Next, the rear end 8b of the operating shaft 8 is inserted into the oval hole of the bearing 24a of the magnetic body 24 to which the spring member 6 is attached, and the bearing portion 24a is inserted into the double-sided drop portion 8c of the operating shaft 8. When the oval-shaped hole is fitted, the magnetic body 24 rotates integrally with the operating shaft 8 and is axially supported so that the operating shaft 8 reciprocates in the axial direction.

Next, the Hall IC 25 of FIG. 4 is mounted on the head 25b of the Hall IC 25 at the entrance of the wedge-shaped Hall IC fitting groove 23d of the housing 23 shown in FIG. In this state, the bottom surface 25c of the Hall IC 25 is pressed by a jig or the like (not shown) so that the Hall IC 25 is fitted into the Hall IC fitting groove 23f.
The head 25b of the Hall IC 25 is pushed into the positioning surface 23h until the head 25b abuts. Then, the Hall IC 25 is fixed at a predetermined position with the outer peripheral surface of the magnetic body 24 being formed with an appropriate gap B.

Next, a washer 28 is attached to the rear end 8b of the operating shaft 8.
And then the truncated cone spring 2 for touch sensor
The upper surface 27a of the smaller outer diameter of 7 is attached to the rear end 8
The spring 27 for the touch sensor is attached to the washer 28 by inserting from the position b. Then, in this state, the housing 26 in which the push switch portion 22 is housed in the recess 26c
Is positioned on the housing 23 by a not-shown positioning portion or a positioning jig. At this time, the touch sensor spring 27 has a lower surface 27b having a large outer diameter.
Is guided inside the hollow portion 26b of the housing 26 without a gap and pressed against the flat portion of the conduction terminal 29 to form the touch sensor portion 22. Also, the bottom surface 2 of the Hall IC 25
The upper surface of the housing 26 is placed in pressure contact with the housing 5c so that the Hall IC 25 hardly moves up and down. Then, the leg portion (not shown) of the stopper plate 30, which is temporarily fixed to the front surface of the housing 23, projects from the rear side surface of the housing 26, and the projecting portion (not shown) is bent to form the magnetic encoder 20, the touch sensor portion 21, and the push member. The magnetic angle detection device of the present invention is assembled by stacking the switches 22.

An example of use of the magnetic angle detecting device of the present invention thus assembled will be described. The magnetic angle detecting device is mounted on a circuit board (not shown) and used, for example, for volume adjustment and balance adjustment of an audio mixer. Operator is knob 1
When 0 is not touched, the control unit sets the automatic operation state, and the volume adjustment and the balance adjustment are automatically performed based on the contents stored in the memory circuit in advance. On the other hand, when the operator's finger or the like touches the knob 10, a conductive path is formed between the knob 10 and the conduction terminal 29 via the operation shaft 8 and the touch sensor spring 27, and the operator touches the knob 10. The control unit (not shown) sets the manual operation state based on the detection, and the volume adjustment and the balance adjustment are switched to the manual operation state. When the operator rotates the knob 10 in this state, the magnetic body 24 rotates in conjunction with the rotation of the knob 10, and the Hall IC 25 detects the rotation of the magnetic body 24 and corresponds to the rotation angle of the knob 10. A pulse signal to output is output, the volume is adjusted based on this pulse signal,
When the knob 10 is rotated while being pressed, the push switch 22 is switched from off to on, and the hall IC
The balance is adjusted based on the pulse signal output from 25.

In such an embodiment, the housing 2
Hall IC fitting groove 2 formed inside the side plate 23e of No. 3
By fitting the Hall IC 25 to 3f, the housing 2 is always
The Hall IC 25 can be fixed at a fixed position on the water surface of No. 3. Further, since the bearing 24a of the magnetic body 24, which is composed of a regulating portion for regulating the horizontal movement, is reliably guided inside the bearing 23b of the housing 23, there is no horizontal movement, and the magnetic body 24 and the hole IC 25 do not move. The gap B is always kept constant without any special adjustment, and a stable predetermined output can be obtained. Even if the magnetic body 24 is vertically displaced, the magnetic poles of the magnetic cords on the outer peripheral side surface of the magnetic body 24 are magnetized in the range from the upper surface to the lower surface of the magnetic body 24 and have the same magnetic field in the axial direction. Since the intensity of the pulse signal is increased, the output of the pulse signal does not change. Moreover, since the positioning of the magnetic body 24 is performed only at one place of the regulating portion that regulates the horizontal movement of the magnetic body 24, the gap B can be secured with higher accuracy. Further, in the mold structure for processing the casing 23, the hollow inside portion of the bearing 23b of the casing 23 constituting the regulation portion and the hole IC fitting groove 23f portion are formed on the same surface side of the mold. Since it can be provided on a certain movable side, there is no influence of misalignment between the fixed side and the movable side during molding processing, so that the dimensional accuracy of the portion forming the gap B of the housing 23 can be improved.
Further, when the magnetic body 24 to which the spring member 6 is attached is incorporated in the operation shaft 8, the hole I is inserted from the same direction on the same jig.
Since C25 can also be press-fitted or inserted into the Hall IC fitting groove 23f of the housing 23, the assembly work time can be shortened and the cost of the magnetic angle detection device of the present invention can be reduced. In addition, the touch sensor spring 27 is used for the contact portion of the touch sensor unit 21 that detects whether or not a person touches the operation shaft 8, and the operation shaft 8 is always operated from the operation shaft tip 8b.
Since a constant pressure is applied to the
Whether or not 0 is touched can always be detected accurately. Further, since the touch sensor spring 27 has a truncated cone shape, as shown in FIG. 5, when a compressive force is applied from the direction of the arrow in the state of (A), the outer diameter of the lower spring 27b having a larger outer diameter is When the spring portion of the small portion a digs into the inner diameter of the lower spring 27b and compresses the touch sensor spring 27 to the maximum extent, it becomes flat as shown in FIG. 5B. Therefore, according to the spring 27 for a touch sensor of the present invention, the coil diameter of the lower spring 27b can be compressed, so that the stroke, which is the reciprocating distance of the operating shaft 8, can be made large even in a small space. Therefore, a stroke equal to or longer than the stroke of the rubber spring 12 built in the push switch portion 22 can be taken, so that the push switch portion 22 can be reliably turned on / off. Further, by increasing the outer diameter of the lower spring 27b, it is possible to form a large hole 29a through which the operation shaft 8 penetrates in the flat portion of the conduction terminal 29 of the touch sensor portion 22, so that the rear end 8b of the operation shaft 8 and the conduction terminal 8b. Even if dust or the like enters into the space 29, it is possible to eliminate a problem such as generation of noise. In this embodiment, the operating shaft 8 and the magnetic body 2
Although 4 is formed separately, it may be formed integrally.

[0021]

As described above, according to the magnetic angle detecting apparatus of the present invention, a groove is provided in the axial direction inside the side plate of the housing, and the Hall IC is fitted in this groove, so that Since the Hall IC can be fixed at a fixed position in the horizontal direction of the housing, it is possible to output an accurate pulse signal without variation. Further, since the groove is opened at a position facing the magnetic body, it is large. You can get the output. Therefore, it is possible to provide a magnetic angle detection device that can accurately detect the rotation angle of the operation shaft 8.

Further, since a groove is provided in the axial direction inside the side plate of the housing and the Hall IC is fitted in this groove, when the magnetic encoder section is assembled, a work of incorporating a magnetic body into the operation shaft is performed. Since the work of press-fitting or inserting the Hall IC into the groove inside the side plate of the housing can be performed on the same jig and from the same direction, the assembling time can be shortened, and the magnetic angle detecting device can be obtained. The cost can be reduced.

Further, since the regulating portion for regulating the horizontal movement of the magnetic body is provided, the gap between the magnetic body and the Hall IC can be always kept constant, so that a stable predetermined pulse signal can be output.

Further, since the magnetic field strength of the magnetic code is set to be the same in the axial direction, even if the magnetic body is vertically displaced, the output of the pulse signal does not change. Further, since the cross-sectional shape of the groove is wedge-shaped and the width of the wedge-shaped opening is narrower than the internal width, the hole I is formed in the groove.
By fitting C, the Hall IC can be pressed and fixed to the inside of the groove, so that the gap between the magnetic body and the Hall IC can be made to have a constant size without variation, so that an accurate pulse signal can be obtained. A magnetic angle detection device for outputting can be provided.

Further, since the touch sensor spring is arranged at the rear end of the operation shaft so that one spring serves both to detect the continuity of the touch sensor unit and to reciprocate the operation shaft, the operation shaft is the shaft. Even if it reciprocates in the direction, the touch sensor spring bends following the operation axis, so stable contact is always obtained.
Moreover, it is possible to provide a magnetic angle detection device having a small number of parts.

Further, since the touch sensor spring has a truncated cone shape, the coil size of the lower panel having a large outer diameter can be compressed on a plane, so that the stroke of the operation shaft can be made large and the push switch portion can be reliably turned on. / Can be turned off. In addition, since the touch sensor spring has a truncated cone shape and the outer diameter of the lower spring is larger than the outer diameter of the upper spring, the operation shaft of the flat portion of the conduction terminal with which the lower spring of the touch sensor spring contacts A large hole can be formed. Therefore, even if dust or the like enters between the rear end of the operating shaft and the conduction terminal, the problem of noise generation can be eliminated.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of a magnetic angle detection device of the present invention.

FIG. 2 is a plan view of a housing on the magnetic encoder side of the magnetic angle detection device of the present invention.

FIG. 3 is a plan view of a magnetic angle detection device of the present invention in which a magnetic body and a Hall IC are incorporated.

FIG. 4 is a perspective view of a Hall IC of the magnetic angle detection device of the invention.

FIG. 5 is a side view of a touch sensor spring of the magnetic angle detection device of the present invention.

FIG. 6 is a cross-sectional view of an essential part of the magnetic angle detection device of the present invention when an operation shaft is pushed.

FIG. 7 is a sectional view of a main part of a conventional magnetic angle detection device.

FIG. 8 is a schematic view of a touch sensor unit of a conventional magnetic angle detection device.

[Explanation of symbols]

 1 Conventional Magnetic Encoder 2 Conventional Touch Sensor 2a Contact Piece 3 Push Switch 4 Conventional Housing 5 Conventional Magnetic Material 5a Bearing 6 Spring Member 7 Conventional Hall IC 8 Operation Axis 9 Wire Spring 10 Knob 11 Housing 12 Rubber Spring 13 Movable Contact 14 Fixed Contact 15 Stop Plate 20 Magnetic Encoder Part of the Present Invention 22 Push Switch Part of the Present Invention 23 Housing 23f Hall IC Fitting Groove 24 Magnetic Material 25 Hall IC 26 Housing 27 Touch Sensor Spring 28 Washer 29 Conductive terminal 30 Stop plate

Claims (6)

[Claims] 1. A casing comprising: a casing; an operating shaft rotatably supported by the casing; a magnetic cord provided on the operating shaft; and a magnetic detecting means attached to the casing. A magnetic angle detection device, characterized in that a groove is provided which extends in the axial direction inside the side plate of the device and opens at a position facing the magnetic code, and the magnetic detection means is fitted and fixed in the groove. apparatus. 2. A magnetic body that forms the magnetic cord, and a regulating portion that regulates the horizontal movement of the magnetic body. The magnetic cord is provided on the peripheral surface of the magnetic body, and the regulating portion is provided. The magnetic angle detection device according to claim 1, wherein the magnetic angle detection device is provided on the housing and a magnetic body. 3. The magnetic angle detection device according to claim 1, wherein the magnetic field strengths of the magnetic cords are the same in the axial direction. 4. The horizontal cross-sectional shape of the groove of the housing is
2. The magnetic angle detecting device according to claim 1, wherein the magnetic angle detecting device has a wedge shape and a width of the wedge-shaped opening side is narrower than an inner width thereof. 5. A touch sensor unit comprising: a housing; an operation shaft rotatably and reciprocally supported by the housing; and a coil spring arranged on a rear end side of the operation shaft. The magnetic angle detection device is characterized in that the continuity detection and the reciprocating movement of the operating shaft in the axial direction are performed. 6. The magnetic angle detection device according to claim 3, wherein the coil spring has a truncated cone shape. [0001]