JPH0731470Y2 - Pulse switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a contact-type pulse switch for generating a rotation direction signal and a rotation amount signal.

[Conventional technology]

For example, a contact-type pulse switch used in a digital type tuner device or the like has heretofore fixed a first slider and a second slider to a rotary shaft and formed a radiating strip on an insulating code plate. By sliding these first and second sliders along the formed position information display pattern, a pulse signal is taken out each time each slider comes into contact with the position information display pattern. . That is, in the position information display pattern, an A-phase pattern radially arranged with a constant pitch from a common pattern concentrically arranged with respect to the rotation axis and a quarter-pitch phase with respect to the A-phase pattern. The B-phase pattern is shifted, and the first slider is slid on the common pattern and the A-phase pattern.
By sliding the second slider on the common pattern and the B-phase pattern, two pulse signals with a phase difference of 90 degrees are extracted. Therefore, by counting the number of this pulse signal, the rotation amount signal of the rotating shaft at the time of forward rotation and reverse rotation can be generated, and the rotation of the rotating shaft can be determined from the difference signal between the two pulse signals. Direction can be generated.

[Problems to be solved by the device]

However, the above-described conventional pulse switch requires the A-phase pattern and the B-phase pattern as the position information display pattern, and thus has a problem that the code plate and hence the switch main body become large. Further, since two sliders have to be set with respect to both of these patterns by shifting the phase by one-quarter pitch, it is difficult to adjust the setting positions of the sliders and there is a problem that mass productivity is poor. Furthermore, since the slider strictly comes into surface contact with the position information display pattern, the pitch of the pattern cannot be narrowed so much that high precision cannot be achieved.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a pulse switch which is compact and highly accurate and is excellent in mass productivity.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a conductive pattern in which position information display patterns are radially arranged on the periphery of a ring-shaped common pattern, and a rotatable shaft that is concentrically incorporated with the common pattern. And a common terminal that is in constant conduction with the common pattern, and in the pulse switch configured to generate a signal of a rotation direction and a rotation amount of the rotary shaft, a pattern holder that holds the conductive pattern is A switching plate, which is fixed to the rotary shaft and is formed by combining the first semi-circular conductive plate and the second semi-circular conductive plate in a ring shape with a minute gap, is arranged at a position facing the conductive pattern. Between the switching plate and the position information display pattern, a conductor that rolls according to the rotation direction of the rotating shaft and contacts one of the first and second semi-circular conductive plates. A first rolling direction signal and a first rotation amount signal are generated by the first terminal extending from the first semicircular conductive plate and the common terminal with a flexible rolling member interposed. The second terminal extending from the second semicircular conductive plate and the common terminal are configured to generate a second rotation direction signal and a second rotation amount signal.

[Action]

According to the above means, the rolling member comes into point contact with the position information display pattern, so that the pitch of the pattern can be made narrower and life characteristics are improved as compared with the case where the slider is in surface contact. Also, since the semi-circular conductive plate that is in conduction with the rolling member is switched according to the rotation direction of the rotating shaft, the rotating direction signal and the rotating amount signal are generated separately when the rotating shaft rotates forward and when it rotates in reverse. As a result, it is sufficient to form one position information display pattern on the pattern holder.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a sectional view showing the overall configuration of the pulse switch according to this embodiment. As shown in the figure, the pulse switch includes a rotating shaft 2 rotatably held by a bearing 1, a pattern holder 4 fixed to the tip of the rotating shaft 2 and holding a conductive pattern 3, Intermediate case 5, switching plate receiver 7 for holding switching plate 6, conductive balls 8, and lid case 9
It is mainly composed of and.

The tip of the bearing 1 is formed in a valve shape, and a ring-shaped click groove 10 in which fine irregularities are alternately arranged is formed on the inner bottom surface thereof. A ring-shaped click spring 11 is fitted on the rotary shaft 2 rotatably supported by the bearing 1.
The click spring 11 having elasticity in the axial direction is engaged with and disengaged from the click groove 10 as the rotary shaft 2 rotates. A chamfer 12 having a parallel plane shape is formed at the tip of the rotary shaft 2, and the pattern holder 4 to be described later is formed.
On the other hand, at the base end portion of the rotary shaft 2, a serration or a split groove (not shown) is formed so that, for example, a knob of a tuner device can be attached.

The pattern holder 4 is a resin molded product including a tubular portion 13 and a collar portion 14, and the conductive pattern 3 made of a thin metal plate is integrated on one surface of the collar portion 14. This conductive pattern 3 is a common pattern formed in a ring shape as shown in the plan view of FIG.
15 and a position information display pattern 16 radially arranged and formed on the periphery of the common pattern 15.
Are in contact with the position information display pattern 16.

As shown in the plan views of FIGS. 1 and 3, the intermediate case 5 has a distal end portion of the rotary shaft 2 inserted through a through hole 17 in a central portion thereof, and a distal end portion of the bearing 1 and a switching plate support 7 described later. Will be installed between

As shown in the plan view of FIG. 4, the switching plate receiver 7 is a resin molded product having a through hole 18 in the central portion, and the switching plate 6 and the slider 19 inserted during molding are placed in the through hole 18. The two terminals 20 and 21 extending from the switching plate 6 and the common terminal 22 extending from the slider 19 are projected outside the switching plate receiver 7. This switching plate 6 is a combination of a first semi-circular conductive plate 23 integrated with the terminal 20 and a second semi-circular conductive plate 24 integrated with the terminal 21 via a minute gear 25 in a ring shape. Around the gear 25, there is formed a resin frame 26 for fixing the semicircular conductive plates 23, 24 and for restricting the moving range of the ball 8. That is, the ball 8 is interposed between the vicinity of the gear 25 of the switching plate 6 and the position information display pattern 16 described above, and when the pattern holder 4 rotates, the ball 8 is moved according to the rotation direction thereof. Rolling inside the frame 26, the first and second
Either one of the semicircular conductive plates 23, 24 of
The position information display pattern 16 is electrically conductive via the. The movement range of the ball 8 regulated by the frame 26 is set smaller than one pitch of the position information display pattern 16. The slider 19 is always in contact with the common pattern 15 described above.

The lid case 9 rotatably holds the tip of the tubular portion 13 of the pattern holder 4 described above, and the lid case 9 and the switching plate receiver 7, the intermediate case 5, the bearing 1 and the like are provided at the four corners. These members are integrated by piercing and crimping a connecting pin (not shown).

Next, the operation of the pulse switch configured as described above will be described.

When the bearing 1 is fixed and the rotary shaft 2 is rotated, the pattern holder 4 rotates integrally, and the balls 8 roll in the rotational direction of the rotary shaft 2 due to frictional force, that is, the ball 8 moves to the first position. 1
After contacting with either one of the second semi-circular conductive plates 23 and 24, the position of the ball 8 regulated by the frame 26 is changed in accordance with the rotation of the collar portion 14 of the pattern holder 4 and the positional information of the balls. It contacts the display pattern 16.

Therefore, when the rotating shaft 2 is rotated in the direction in which the ball 8 comes into contact with the first semicircular conductive plate 23, the common pattern
Common terminal extended from slider 19 that is in constant contact with 15.
The first rotation direction signal and the first rotation amount signal can be generated by 22 and the terminal 20 extended from the first semicircular conductive plate 23.

When the rotation direction of the rotary shaft 2 is reversed from this state, the balls 8 roll in the frame 26 and come into contact with the second semi-circular conductive plate 24, so that the common terminal 22 and the second semi-circular conductive plate 24 are brought into contact. A second rotation direction signal and a second rotation amount signal can be generated by the terminal 21 extended from the plate 24.

Since the moving range of the ball 8 is set smaller than one pitch of the position information display pattern 16 as described above, when the rotating shaft 2 is reversed, the semi-circular conductive plate that is in conduction with the ball 8 outputs a pulse signal. The signal can be switched before it occurs, and the signal in the reverse rotation direction can be reliably taken out.

Further, since the click spring 11 engages with and disengages from the click groove 10 as the rotary shaft 2 rotates, it is possible to feel the number of clicks according to the amount of rotation.

As described above, in the above-described embodiment, since the ball 8 is point-contacted with the position information display pattern 16 to extract the rotation amount signal, compared to the conventional product in which the slider slides on the position information display pattern. The pattern pitch can be narrowed to achieve high precision and the life characteristics are also improved. Further, since the semi-circular conductive plate 23 or 24 that is electrically connected to the ball 8 is switched according to the rotation direction of the rotation shaft 2, the rotation direction signal and the rotation amount signal are separately provided when the rotation shaft 2 is rotating normally and when rotating reversely. As a result, it is only necessary to form one position information display pattern 16 on the pattern holder 4, and the pattern holder 4 and thus the switch body can be downsized and two sliding movements can be achieved. Mass productivity can be improved compared to the conventional product, in which the child has to be mounted out of phase. Furthermore, since the click groove 10 is formed in the bearing 1 and the click spring 11 is attached to the rotary shaft 2, it is not necessary to separately install the click groove substrate and the click spring receiver, and the number of parts is eliminated.

Although balls are used as the rolling members in the above embodiment, other rolling members such as rollers can be used.

[Effect of device]

As described above, according to the present invention, since the rolling member is brought into point contact with the position information display pattern and the rotation amount signal is taken out, the pitch of the pattern can be narrowed and the accuracy can be improved, and the life can be shortened. Since the characteristics are improved and it is sufficient to form one position information display pattern, the switch main body can be downsized and mass productivity can be improved, and an excellent pulse switch can be provided.

[Brief description of drawings]

The drawings are all related to one embodiment of the present invention. FIG. 1 is a sectional view showing the overall structure of a pulse switch, FIG. 2 is a plan view of a pattern holder of the pulse switch, and FIG. 3 is an intermediate part of the pulse switch. FIG. 4 is a plan view of the case, and FIG. 4 is a plan view of the switching plate receiver of the pulse switch. 1 ... Bearing, 2 ... Rotating shaft, 3 ... Conductive pattern, 4 ...
... Pattern holder, 6 ... Switching plate, 7 ... Switching plate receiver, 8
…… Ball, 15 …… Common pattern, 16 …… Position information display pattern, 20,21 …… Terminal, 22 …… Common terminal, 23 …… First semi-circular conductive plate, 24 …… Second semi-circle Conductive plate, 25 ……
Gear up, 26 ... frame.

Claims (1)

[Scope of utility model registration request] 1. A conductive pattern formed by radially arranging position information display patterns around the periphery of a ring-shaped common pattern, a rotatable shaft that is concentrically incorporated with the common pattern, and is rotatable, and the common pattern is always present. In a pulse switch that is provided with a common terminal that is in conduction, and that generates a signal of a rotation direction and a rotation amount of the rotating shaft, a pattern holder that holds the conductive pattern is fixed to the rotating shaft,
A switching plate formed by combining the first semi-circular conductive plate and the second semi-circular conductive plate in a ring shape through a minute gap is arranged at a position facing the conductive pattern, and the switching plate and the position information are also provided. A conductive rolling member that rolls in accordance with the rotation direction of the rotary shaft and contacts one of the first and second semicircular conductive plates is interposed between the display pattern and the display pattern. The first terminal extending from the first semi-circular conductive plate and the common terminal generate a first rotation direction signal and a first rotation amount signal, and the second terminal extends from the second semi-circular conductive plate. A pulse switch characterized in that a second rotation direction signal and a second rotation amount signal are generated by a second terminal and the common terminal.