JPH03244012A - Rotary electric parts - Google Patents

Abstract

PURPOSE:To provide click feeling to a rotor in simple constitution by using a single magnet and a magnetic plate whose magnetic part is formed with a prescribed pitch. CONSTITUTION:At least an independent magnet 22 containing a pair of N and S poles is provided at the periphery of a rotary shaft 12 together with a magnetic plate 26 having its magnetic part formed with a prescribed pitch. Then the magnet 22 or the plate 26 is fixed to the shaft 12 with the other set rotatably. When an inner rotor 18 is revolved, the magnet 22 tries to stick to a place under the plate 26 keeping out of a through hole 29 of a spacer 26 owing to the magnetic force of the magnet 22. Thus the click feeling is provided for the revolution of the rotor 18. Then the satisfactory click feeling is obtained for a rotor in simple constitution.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention detects the rotation state of a rotating body using a rotation detection device, and detects the rotation state of an electronic device such as a video tape recorder (hereinafter referred to as VTR) according to the rotation state. This invention relates to rotating electrical components that control the operation of.

[Prior Art] Conventionally, a rotary electric component used for controlling the operation of a VTR, for example, has a rotary type that corresponds to the rotation angle of a rotary dial plate, as disclosed in Japanese Patent Laid-Open No. 61-16 and No. 624. Some devices have a cam surface formed on a rotary dial plate, a cam roller pressed against the cam surface, and a torque change that corresponds to the shape of the cam surface, giving a click feeling to the rotation operation.

Also, as a device that gives a click feeling to the rotating operation member,
As disclosed in Japanese Utility Model Application Publication No. 60-94739, there is a device in which a projection biased by a click spring is engaged with a recess formed in a rotary plate to give a click feeling.

Furthermore, as shown in Japanese Utility Model Application Laid-Open No. 60-148626 and FIG. 8, a ring magnet 1 is formed by magnetizing a donut-shaped magnetic body to NS poles at a constant pitch to give a click feeling to rotation. Coaxially with this, a magnetic comb ring 2 having comb teeth with the same pitch as the NS pole is attached to the rotating shaft 3.
There is also a device in which the ring magnet 1 is fixed and the comb-tooth ring 2 is rotated, thereby giving a click feeling to the rotation of the comb-tooth ring 2. In some cases, a rotating electric component having this structure is used as an operation dial for controlling the operation of a VTR or the like.

[Problems to be Solved by the Invention] Among the rotary electric components of the prior art, those that mechanically provide a click feeling using a spring have a large number of parts, require many man-hours to assemble, and are difficult to adjust the click feeling. It also has the disadvantage of poor durability.

Furthermore, in the case shown in Figure 8, since the north and south poles are formed in a ring shape, it is difficult to obtain a strong magnetic force, and in order to obtain a good lick feeling, the magnet must be made larger, resulting in a larger device. This goes against the recent demand for smaller and lighter electronic devices. Moreover, in this case, the ring magnet is fixed to the chassis, so the rotating parts must be placed directly above it.
There is a drawback that looseness is likely to occur when electronic components such as a contact board and a slider placed above the contact board are attached.

The present invention was made in view of the problems of the conventional technology described above, and an object of the present invention is to provide a rotating electric component that has a simple structure, provides a good lick feeling, is small in size, and has accurate rotational movement. shall be.

[Means for Solving the Problems] This invention includes at least one independent magnet having a pair of NS poles around a rotating shaft, and a magnetic plate on which magnetic parts are formed at a predetermined pitch, facing each other. This is a rotary electric component in which one of the magnet or the magnetic plate is fixed to the rotating shaft, and the other is rotatable.

Further, in the present invention, a plurality of rotating bodies are rotatably attached to one rotating shaft in an overlapping state, each bearing portion of the plurality of rotating bodies is formed independently, and the plurality of rotating bodies are mutually connected to each other. The facing portion of the bearing is a rotating electrical component that has a spacer fixed to the rotating shaft interposed therebetween.

Further, in the present invention, a plurality of rotating bodies are rotatably attached to one rotating shaft in an overlapping state, each bearing portion of the plurality of rotating bodies is formed independently, and the plurality of rotating bodies are mutually connected to each other. A spacer fixed to the rotating shaft is interposed between the bearings of the facing parts, at least one independent magnet having a pair of north and south poles is attached to one of the rotating body or the spacer, and the other magnet is fixed to the rotating body. (Both are rotary electric components that are partially formed of a magnetic plate on which magnetic parts are formed at a predetermined pitch.

[Function] The rotating electric component of the present invention is small and can provide a strong lick feeling by using an independent magnet having a pair of NS poles and a magnetic plate having magnetic parts at a predetermined pitch. be.

Further, in the rotating electric component of the present invention, a plurality of rotating bodies attached in a stacked state can rotate completely independently without rotating together with each other.

Furthermore, the rotating electric component of the present invention has a plurality of rotating bodies attached in a stacked state that rotate completely independently without rotating together, and has a small and simple structure with a good lick feel. It rotates.

[Example] An example of this invention will be described below based on the drawings.

The rotating electric component in this example is about a so-called jog shuttle used in the operating section for controlling the operation of a VTR.The inner rotating body is called a jog, and the outer rotating body is called a shuttle. It is used to control playback, fast forwarding, rewinding, etc. of the VTR by swinging it. This embodiment has a chassis 1o made of synthetic resin such as PPS, and a substrate 11 such as a paper epoxy resin laminate on which a conductive pattern is formed in concentric circles is placed on the bottom surface of the chassis 1o. The chassis 1o has a rotating shaft 12 protruding from the center thereof integrally with the chassis 10, and further includes a positioning protrusion 1.
3 and a spacer receiver 14 are integrally provided with the chassis 10 and protrude at predetermined positions. Further, through holes 15 that fit into the rotation shaft 12, the positioning protrusion 13, and the spacer receiver 14 are formed in the substrate 11 at corresponding positions, and the substrate 11 is positioned in the positioning protrusion 13 of the chassis 1o. It has been fixed. Further, a plurality of terminals 16 are caulked to one end of the board 11 and extend in a direction perpendicular to the board 11.

Above the substrate 11, there is an inner rotating body 18 made of synthetic resin that has a slider 17 and is fitted onto the rotating shaft 12, and an inner rotating body 18 that has a slider 19 and rotates by slidingly contacting the outer surface of the spacer receiver 14. An outer rotating body 20 made of synthetic resin is attached. Each slider 17.19 slides on a conductor pattern on the surface of the substrate 11, and the body pattern is partially provided with an insulating film, and each slider 17.19 can be opened or closed depending on the sliding position. The state is different, and this is what is output from the terminal 16.

The slider 17 is attached to the lower surface of the flange portion 21 of the inner rotating body 18, and a metal plate 23 to which a magnet 22 is bonded is fixed to the upper surface of the slider 17, as shown in FIGS. 6 and 7. ing. This fixation is achieved through a through hole 2 formed in the metal plate 23.
4 through the protrusion 25 formed on the flange portion 21,
It is then melted and crushed. The magnet 22 is a pair of N
It is a rare earth magnet with an S pole, and is a powerful magnet with a magnetic flux density of 2300 Gauss. As shown in FIG. 6, three magnets 22 are arranged line-symmetrically on the metal plate 23, and two of the magnets 22 at symmetrical positions are bonded at an interval of 72 degrees.

Above the magnet 22 is a spacer 26 made of a magnetic metal plate.
is placed on the tip of the spacer receiver 14. As shown in FIG. 5, the spacer 26 has a notch 27 at its peripheral edge.
is formed and engages with a convex portion 28 provided at the tip of the spacer receiver 14 to prevent the spacer 26 from rotating. Further, through holes 29 are formed in the spacer 26 at a pitch of 36 degrees, and the opening angle of the through holes 29 is 18 degrees. Moreover, the inner rotating body 1 is attached to the lower surface of the spacer 26.
The thrust receiving portions 30 of No. 8 are in contact with each other. Thrust receiving part 3
0 is located symmetrically around the rotating shaft 12, with its tip located above the surface of the magnet 220 so that the magnet 22 does not stick to and come into contact with the spacer 26.

The thrust receiving portion 31 of the outer rotating body 20 is in contact with the upper surface of the spacer 26, and furthermore, the outer rotating body 20 is
A slider 19 is attached to the lower surface of the flange portion 32 of the outer rotating body 20 in sliding contact with the outer surface of the spacer receiver 14, and a coil spring 33 is provided on the upper surface for returning to the center position when rotated. . One end of the coil spring 33 is fixed to the chassis 10, and the other end is fixed to the outer rotating body 20. A recess 34 is formed on the side surface of the flange portion 32 of the outer rotating body 20, and a click spring 35 is engaged at the center of the outer rotating body 20.

A cover 37 made of a metal plate is attached above the flange portion 32, and the cover 37 is attached to the chassis 10 by a claw 38.
Fixed. Further, a thrust receiving portion 36 is formed on the upper surface of the flange portion 32 and comes into contact with the back surface of the cover 37 to prevent the outer rotating body 20 from coming off in the axial direction.

In the rotary electric component of this embodiment, each slider 17, 19 comes into sliding contact with a conductor pattern formed on a substrate 11, and each terminal 16 is turned ON depending on the rotation angle of the slider 17, 19.

The OFF state is different, and the operation of the VTR is controlled by rotating the inner and outer rotating bodies 18°20.

In the inner rotating body 18, the bottom surface of the chassis around the center shaft 12 and the back surface of the spacer 26 serve as bearings in the thrust direction, and the rotating shaft 12 serves as a bearing in the radial direction. Further, in the outer rotating body 20, the surface of the spacer 26 and the back surface of the cover 37 serve as bearings in the thrust direction, and the outer surface of the spacer bearing 14 serves as a bearing in the radial direction.

When the inner rotating body 18 is rotated, the magnet 22 tends to avoid the through hole 29 of the spacer 26 and to be located under the magnetic body due to its magnetic force, giving a click feeling to the rotation. Therefore, in this embodiment, since there are 10 through holes 29, 10 click positions can be obtained in one rotation, and 10 operation modes can be controlled.

Further, the outer rotating body 20 automatically returns to the center position by the coil spring 33 when rotated to the left or right, and is click-stopped at the center position by the recess 34 and the click spring 35.

1 The rotating electric component of this example consists of a single magnet and a through hole 29.
Since a click feeling is given to the rotation by using a magnetic plate formed with . Moreover, since the smoother 26 is made of a magnetic plate and is used also, it is possible to further reduce the size.

In addition, two sets of sliders 17.
19 can be slid, and when rotating, each rotating body rotates independently and there is no co-rotation even though the inner and outer rotating bodies 18 and 20 are superimposed on each other. In addition, it can be made compact and costs can be kept low, and there is no backlash in the rotating body or slider, allowing stable operation for a long period of time.

In addition, in the rotating electric component of the present invention, the magnet may be fixed and the magnetic plate may be attached to the rotating body, and the number of through holes in the magnetic plate may be an odd number or may be arbitrarily determined. . Also, instead of a through hole, a comb-like shape may be used, or a structure in which a strongly magnetic part and a weakly magnetic part are repeated at a predetermined pitch instead of a through hole may be used. It is also possible to use a pitch, if necessary, and there is no need for holes to be formed.

[Effects of the Invention] The rotating electric component of the present invention uses a single magnet and a magnetic plate in which Gn parts are formed at a predetermined pitch to give a click feeling to the rotating body, so the device can be made smaller. The magnet can be arbitrarily selected, and the number of clicks can be arbitrarily set to even or odd numbers.

Furthermore, since the facing portions of the plurality of overlapping rotating bodies are independently supported by spacers, each rotating body can be operated completely independently without being rotated together.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a rotating electrical component according to an embodiment of the present invention, FIG. 2 is a partially cutaway front view of the rotating electrical component of this embodiment, and FIG. 3 is a longitudinal sectional view of a rotating electrical component of this embodiment. Fig. 4 is a bottom view of the rotary electric component of this embodiment, and Fig. 5 is a right side view of the rotating electrical component of this embodiment.
Figure 6 is a front view of the spacer of this embodiment, Figure 6 is a front view of the metal plate to which the magnet of this embodiment is attached, Figure 7 is a right side view of Figure 6, and Figure 8 shows the conventional technology. FIG.

Claims (1)

[Claims] 1. A rotating body is rotatably provided around a rotating shaft,
A rotating electrical component that has a click member that provides rotational resistance at a predetermined position when a rotating body rotates to produce a click feeling,
At least one independent magnet having a pair of NS poles and a magnetic plate having magnetic parts formed at a predetermined pitch are provided around the rotating shaft, facing each other, and one of the magnet or the magnetic plate is provided. A rotary electric component, characterized in that the other is fixed to the rotation shaft and the other is rotatable. 2. In a rotating electrical component in which a plurality of rotating bodies are rotatably mounted on one rotating shaft in a stacked state, each bearing portion of the plurality of rotating bodies is provided independently, and the plurality of rotating bodies are A rotating electric component characterized in that a spacer fixed to the rotating shaft is interposed between the bearing portions of the parts facing each other to form an axial bearing. 3. A rotating electric device in which a plurality of rotating bodies are rotatably mounted on one rotating shaft in a stacked manner, and has a click member that provides rotational resistance at a predetermined position to create a click feeling when the rotating bodies rotate. In the component, each of the bearing portions of the plurality of rotating bodies is formed independently, and a spacer fixed to the rotating shaft is provided in the bearing portion of the portion where the plurality of rotating bodies face each other to form the bearing portion. At least one independent magnet having a pair of NS poles is attached to one of the rotating body or spacer, and at least a part of the other is formed of a magnetic plate on which magnetic parts are formed at a predetermined pitch. A rotating electrical component featuring: