JPS5918594Y2 - Selective pulse rotary switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a selective pulse switch that has different groups of contacts that connect and separate depending on the direction of operation.

Conventionally, technologies have been developed that electronically distinguish pulse signals corresponding to mechanical operations and perform addition or subtraction digitally, for example, controlling a frequency divider circuit to obtain a desired oscillation frequency. A method has been used in which pulses are electronically generated using the order of engagement and separation of a plurality of switches arranged in an interface, and the pulses are detected.

However, this method has the disadvantage that the memory and electronic circuits become complicated and it is difficult to miniaturize.

For example, as this type of switch, rotary switches such as those shown in Fig. 8, A, 9, and C have been developed.
26626, etc.).

However, this switch is generally large in size, and although the switch characteristics are good at normal switching speeds, there are problems in following the switching operation at high speeds.

Furthermore, improvements in high-speed performance tended to increase switch torque.

Recently, the number of channels has been increasing, and accordingly, high-speed switching is desired, and a switch that has a good feel and good high-speed followability is required.

As an example of use, it is desired that the device is equipped with a detent mechanism and rotates back and forth once per second, with each ±20 pulses, for a total of about 40 pulses, and in this case, the pulse interval will be 25 m5eC or less.

Due to circuit considerations, there is a requirement for a pulse width, that is, a switch characteristic of 5 m5 ec or more when the switch is turned on.

As an improvement to this type of switch, the structure is relatively simple,
A selective pulse rotary switch which can be made small and inexpensive is disclosed in Japanese Patent Laid-Open No. 14385/1983.

Here, the clip-shaped movable contact piece 11 serves both as a contact spring for maintaining a constant electrical contact pressure with a fixed contact and as a mechanical torque spring for returning the switch to neutral.

This has the advantage of reducing the number of parts, but it also makes the switch larger.Also, even if the contact spring is set optimally, the neutral return torque and switch operation are often not optimal, so the function, operation, and operation feel of the switch are improved. This is generally difficult.

In addition, since the length of the spring piece of the clip-shaped movable contact piece is extremely long, the self-resonance frequency of the spring piece 13 becomes very low, causing a problem in the followability of the switch at high speeds. switching is difficult.

As a countermeasure for the above, the present inventor has (A)
No. 137026, (B) Utility Application No. 51-154478,
(C) Inventions and ideas such as Japanese Patent Application No. 52-98260 have also been developed, but the two cases (A) and (B) are still slow to operate and are somewhat large, while (C) is superior in operation. However, the mechanism was somewhat complicated.

This invention solves these shortcomings and is suitable for counters, TVs,
The object of the present invention is to obtain a small, reliable, and low-cost rotary switch that generates different arbitrary pulses in the same room in the clockwise and counterclockwise directions as a tuner selection and remote control mechanism for a transceiver or the like.

In other words, when operating the operating axis in one direction, the contact group S1
The operating direction is mechanically divided by configuring a switch in which the contact group S2 approaches and separates, but the contact group S2 does not approach and separate, and when operating in the opposite direction, the contact group S1 does not approach and separate, but the contact group S2 approaches and separates. Converting a directional mechanical operation (for example, an addition or subtraction operation) into an electronic signal can be performed reliably, inexpensively, and easily, and can also be used immediately even if the installed switch is replaced with another type. Another object of the present invention is to provide a selection pulse rotary switch that can be miniaturized.

Hereinafter, the present invention will be explained with reference to drawings showing embodiments.

Figure 1 is a front view, Figure 2 is a side view, Figure 3 is a sectional view taken along line II in Figure 2, Figure 4 is a sectional view taken along line II-II in Figure 2, and Figure 5 is a sectional view taken along line 1 in Figure 2. FIG. 6 is a front view of the switch case, actuation type member, slider and fixed contact terminal, and FIG. 7 is a perspective view and other detailed views of the cam member.

In Figures 1 to 3, 1 is a U-shaped box-shaped metal case that opens downward, and an insulating board 2 is fixed to cover this opening, and an operating shaft 3 is rotatably locked in the center of the upper surface. The bearing 4 is fixed upwardly.

The operating shaft 3 passes through the inside of the case, and is supported in a hole 5 in the center of the insulating substrate 2 to prevent play, as shown in FIG.

Reference numeral 6 denotes a rotary plate made of plastic or the like, which is fixed perpendicularly to the operating shaft 3 within the case, and around which a suitable number of tooth-shaped, approximately isosceles triangular protrusions 7 are provided (18 in the embodiment). Individual).

The trough 8 receives and engages a cam 11 of a cam member 10 rotatably connected to a pin 9 fixed to the upper surface of the case 1 through a pivot hole or the like of the insulating substrate 2.

A well-known articulated uneven portion 26 is formed on the upper surface of the rotary plate 6.
Further convenience in use can be obtained by providing a known moderation mechanism for the operating shaft.

The seventh cam member 10 is made of plastic mold.
As shown in FIG. A notched recess (or retaining portion such as a groove) 13 is provided, and receives and engages an actuator (knob) 15 of a switch portion 14 disposed on the insulating substrate 2.

As shown in FIGS. 4 and 5, the switch section 14 is positioned so that the rotation axis 9 of the cam member 10 is on the outer side of approximately the center of the length of the switch along the sliding direction of the switch section 14. Also, as shown in FIG. 6, there is a sliding member 19 that accommodates a slider 18' that connects and separates the upper contact portion of the fixed contact terminal 16, 17, and 18 implanted in the insulating substrate 2. is formed integrally with this, and is structured to perform a slide switch operation in which the switch is moved left and right by an actuator (knob) 15 having a cylindrical shape or the like that protrudes upward from the upper opening of the switch case 20. .

Here, as shown in FIGS. 2 and 5, reference numeral 21 is a return spring made of metal elastic wire and has a deformed U-shape, and its central base 21B is bent downward to connect to a spring provided on the insulating substrate 2. 4 A pair of grooves 2 that engage with this as shown on the right side of Figure 4.
After inserting it into B from the bottom side and fitting it into the groove, it is held down by the hem of the side wall of the case 1 and attached to the insulating board 2.

The free ends of the left arm 22 and right arm 23 of the return spring 21 are fitted into grooves 24 and 25 provided in the left and right end surfaces of the side walls of the switch case 20, respectively, as shown in FIG.

As shown in FIG. 6, the distance a between the groove bottoms of the grooves 24 and 25 is approximately equal to the left-right length b in the sliding direction of the sliding member 19 of the slide switch, and when the operating shaft 3 is open, Sliding type 1
9 is inwardly pressed by the left and right arms 22 and 23 of the return spring 21 and is kept at the center of the switch section.

As shown in FIG.
When the sliding part 19 is in the center, it contacts only the center terminal 17 and does not contact the other fixed contact terminals 16 and 17, but when the operating part 19 is moved to the left, the fixed contact terminal 16.17 (contact group S,) is short-circuited, and when moved to the right, fixed contact terminals 17.18 (contact group S2) are short-circuited.This is a known slide switch structure.

In the above-mentioned slide switch, etc., there are restrictions on the spacing between the terminals and terminal electrodes, such as insulation distance and soldering, so it is difficult to downsize below a certain level, and the distance the actuator 15 moves is also limited. millimeters are required.

However, in the present invention, as shown in FIGS. 3 and 4, the distance from the rotation center of the cam member 10 to the tip of the cam 11 is r, and the distance to the center of the actuator 15 of the sliding member 19 of the switch section 14 is If the distance is d, by appropriately selecting d such that d>r, it is possible to secure the moving distance of the actuator 15 necessary for operating the switch 14, and it is possible to achieve miniaturization as a whole. .

Here, it is desirable for the slide switch to be a small switch that is easy to operate and has low friction.

Here, the moving distance of the actuator 15 can be freely selected by forming the drive engaging portion 13 of the cam member 10 into a substantially parallel groove and making the actuator 15 into a cylinder.

Alternatively, a structure may be adopted in which the rotation support of the cam member 10 is provided on the cam member itself and the pin 9 is not used.

Furthermore, the switch 14 may be a switch with center return instead of the one using the return spring 21, and various switches can be used by changing only the actuator 15 integrated with the sliding member 19.

Next, the operation will be explained with reference to FIGS. 1, 3, and 5.

When the central operating shaft 3 is rotated clockwise when viewed from the shaft end, the rotary plate 6 fixed to it also rotates clockwise, and the cam member, which is received in the trough 8 provided on the periphery, rotates clockwise. 1
The slope of the cam 11 of 0 and the slope of the protrusion 7 of the rotary plate engage, and the cam member 10 rotates counterclockwise around the pin 9. The actuator 15 of the switch part 14 fitted into the notch top is the fifth
As shown in the figure, it is pressed to the left to move the sliding member 19 to the left against the pressure of the left arm 22 of the return spring 21 to short-circuit the fixed contact terminals 16 and 17 (contact group S1).

When the operating shaft 3 is further rotated, the cam 11 is released from the protrusion of the rotary plate 6, and the actuation mold 19 returns to the center of the switch due to the elastic pressure of the return spring 21, and the fixed contact terminal 16.1
7 is released.

At the same time, the cam 11 is received in the next valley 8 of the rotary plate 6.

When the operating shaft 3 is further rotated, the same operation as described above is repeated, and the fixed contact terminals 16, 17 (contact group S,) repeat contact and separation.

On the other hand, when the operating shaft 3 is rotated counterclockwise when viewed from the shaft end, the fixed contact terminals 17 and 18 (contact group S2) of the switch section 14 are Repeat contact and separation.

Compared to the conventional selection pulse rotary switch, the present invention is easy to manufacture and low in cost, has a strong mechanism, has less friction, has improved operation, and is smaller in size.

In addition, the switch can be used for various types of switches by changing only the actuator 15 of the sliding type 19 of the slide switch.
The practical advantages are significant.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with Figure 1 being a front view and Figure 2 being a front view.
The figure is a side view, FIG. 3 is a sectional view taken along line II in FIG. 2, FIG. 4 is a sectional view taken along line II-II in FIG. 2, and FIG. FIG. 6 is a front view of the switch case, actuating member, slider, and fixed contact terminal, and FIG. 7 is a perspective view and other detailed views of the cam member. Figure 8 A9 and C show the switching mechanism of a conventional similar switch.

Claims (1)

[Claims for Utility Model Registration] An insulating substrate 2 is attached to the lower opening, an operating shaft 3 is rotatably mounted at the center of the upper surface, and a disc-shaped cam integrated into the extension of the operating shaft inside the case. A slide switch 14 and a cam member 10 are housed in a case 1 made of metal and equipped with a rotary plate 6, and a ring-shaped articulation protrusion 26 is provided on the upper surface of the cam rotation shaft 6 of the operation shaft 3, and a ring-shaped articulation protrusion 26 is provided on the side surface of the periphery. The switch case 20 is provided with continuous gear-shaped valleys 8, and the actuator 15 is integrally protruded above the sliding member 19 that slides within the case 20 of the slide switch 14 fixed on the insulating substrate 2. Grooves 24 and 25 are provided on the left and right side walls in the sliding direction of the sliding part 19 so that the distance a between the groove bottoms is approximately equal to the length b of the sliding part 19 in the sliding direction, and the left and right @ The arm 22.2 of the U-shaped return spring 21 is made of a metal elastic wire with a distance between the free ends of 22 and 23 shorter than the length b of the sliding member and a central base bent downward.
Both free ends of the switch case 20 are fitted into the grooves 24 and 25 of the switch case 20, and both bent bases of the arms are inserted into a pair of grooves provided on the insulating substrate to attach it to the insulating substrate 2, By engaging a cam member 10 rotatably attached to a pin 9 fixed between the top surface of the case and an insulating board, a cam 11 that engages with a valley 8 on the periphery of the cam rotary plate 6, and an actuator 15 of a switch 14. A selection pulse rotary switch that is integrally provided with a driving arm 12 having a retaining portion 13 that slides a sliding member 19 to operate the switch.