JPS584412B2 - rotary switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary switch, and an object of the present invention is to provide a rotary switch having a structure that allows easy assembly of a detent mechanism.

1 and 2 are an exploded perspective view and a partially cutaway side view of an assembled state of a switch for a channel selection device to which an embodiment of the rotary switch according to the present invention is applied, respectively.

In the figure, a switch 1 for a channel selection device has a frame 2, and the frame 2 is formed by integrally die-casting a rectangular plate-shaped frame portion 3, a detent portion 4, a boss portion 5, etc.

As shown in FIGS. 3A and 3B, the frame portion 3 has a circular recess 3a and a pair of notches 3b on its back surface, and through holes 3c at its four corners.

The detent section 4 has, for example, 40 radial positioning grooves 4a for 40 channels on the outermost periphery of the bottom surface of the recess 3a.
are arranged in a circumferential manner.

Further, the boss portion 5 has a shaft hole 5a, and a threaded portion 5b is formed on the outer periphery.

Reference numeral 6 denotes a tuning shaft, which is provided with a pair of outer circumferential grooves 6a and 6b at the front and rear, and further in front of the front outer circumferential groove 6a is formed a shaft portion 6c and a flange portion 6d of a predetermined length.In particular, the shaft portion 6c has a diameter that can be fitted into the shaft hole 5a of the boss portion 5.

As will be described later, the channel selection shaft 6 is fitted into the shaft hole 5a of the frame 2 from the front of the frame and projects rearward.

Reference numeral I designates a ball holding disc, as shown in FIG. 4, which has a pair of protrusions 7a on its back surface and a pair of U-shaped notches 7b on its outer periphery into which steel balls 8 are respectively fitted. It is fitted into the rear protrusion of the channel selection shaft 6 so as to rotate integrally therewith, and is housed in the recess 3a of the frame 2.

Reference numeral 9 denotes a leaf spring, which is similarly loosely fitted to the rear protrusion of the tuning shaft 6 and housed in the recess 3a, as shown in FIG. Channel selection axis 6
The ball 8 is engaged with the outer circumferential grooves 6a, 6b of the detent positioning groove 4a, and is elastically deformed by being regulated by the C-rings 10, 11, thereby bringing the ball 8 into pressure contact engagement with the detent positioning groove 4a.

In this case, the bridge portion 9 of the leaf spring 9 as shown in FIG.
Both the a and handle portions 11a of the C-rings 11 are engaged between the protrusions Ia of the pair of retaining discs 701.

This makes assembly positioning work easier and each part 7
, 9.11 rotate smoothly and integrally with the tuning shaft 6 without play, and the pressure contact force of the ball 8 is always constant, so the torque is stable during the number of times, and the rotation can be made even more smoothly.

When assembling the above-mentioned parts 2, 6 to 11, first insert the tuning shaft 6 from the front side of the frame 2 into the shaft hole 5a of the boss portion 5 and slide it in the direction of arrow A. 6
After the bolt c fits into the shaft hole 5a, the flange 6d comes into contact with the front surface of the boss 5, and the outer circumferential groove 6at6b reaches the position shown by the dashed line in the figure.

That is, the tuning shaft 6 is displaced further to the left by fitting into the shaft hole 5a.

Therefore, after the holding disk 7, ball 8, and leaf spring 9 are assembled in sequence, the C-ring 11 is engaged with the outer circumferential groove 6b.

At this time, since the outer circumferential groove 6b is displaced further to the left with respect to the frame 2 as described above, the <CJ ring 11 necessary for elastically deforming the leaf spring 9 can be easily engaged with the groove 6b.

After that, the tuning shaft 6 is pulled in the direction of arrow B while elastically deforming the leaf spring 9, and each part is slid until it reaches the position shown by the solid line in the figure, and the outer circumferential groove 6a and the shaft part 6c are aligned with the boss part 5. The C-ring 10 is engaged with the groove 6a.

By providing the shaft portion 6c on the tuning shaft 6 and making it slidable in this manner, the difficult work of assembling the parts while elastically deforming the leaf spring 10 is no longer necessary, and the assembly work is extremely easy. .

12 is a disk case, a pair of case halves 12a, 1
A disk 13 is housed between 2b.

The case half 12b is the case 1 as shown in FIG. 6A and B.
Terminals 15 (151 to 154) are attached and fixed to 4 using a holder plate 16.

The case 14 has a shaft hole 14a in the center, a recess 14b1, a pin 14c, a pin hole 14d1, and a through hole 14e on the inner surface, and a ring-shaped recess 14j and a recess 14 on the outer surface.
k is provided.

The other case half 12a has the same structure as the case half 12b, except that, as shown in FIG. different.

When assembling the case halves 12a and 12b, the disc 13 is housed in the recess 14b with the inner surfaces facing each other, and the pins 14c are fitted into the pin holes 14d to bring them into close contact and integrate the disc case 12. Form.

The tuning shaft 6 is relatively fitted into the shaft hole 14a of the disc case 12, and the ring-shaped protrusion 14 of the case half 12a
f. By fitting the protrusions 14g into the four parts 3a of the frame 2, it can be easily positioned and assembled to the frame 2.

At this time, the disk 13 in the disk case 12 is inserted through its shaft hole 13a into the tuning shaft 6 so as to rotate integrally therewith.

As shown in FIG. 1, the disk 13 has an insulating portion 20a on the resin surface and a conductive portion 21 embedded with a thin copper plate shown in a matte pattern in the figure, each formed in a predetermined pattern on both sides of a resin circular plate 20. It becomes.

Both sides of the disc 13 are brought into contact with the contacts of the terminals 15 (151 to 154) of the case halves 12a and 12b, and as the disc 130 is rotated by the tuning shaft 6, the manner in which each terminal contacts the pattern changes, thereby changing the channel. Signal switching is performed.

Reference numeral 22 denotes a metal rectangular plate-shaped case holder, into which the rear end of the tuning shaft 6 is relatively fitted into its shaft hole 22a to support it.

In addition, the locking claws 22b bent at the four corners of the case holder 22 engage the through holes 1 of the disc case 12 and the frame 2.
4e and 3c, and the disk case 12 is attached to the frame 2 by tightening the tip that protrudes in front of the frame 2.
It is integrally attached and held.

To attach this channel selection device switch 1 to a transceiver case, insert the boss portion 5 of the device switch 1 into the hole 23 from the back side of the case board 23, as shown by the two-dot chain line in FIG.
a and fit the protrusion 3d of the frame 2 into the hole 23.
b to be engaged with the nut 25 to prevent rotation, and then tighten the nut 25 to the mounting screw portion 5b via the washer 24.

In the switch 1 for a tuning device assembled as described above, when the tuning shaft 6 is rotated in order to switch and tune a desired channel, the tuning shaft 6, the holding disk 7 holding the ball 8, and the plate spring 9. The disks 13 rotate together, and the ball 8 engages with the four portions 4a of the detent portion 4 corresponding to the desired writing channel.

As a result, the disk 13 has each terminal 15 (151-154) in contact with the channel pattern, and a circuit (not shown) connected to the terminal 15 (151-154).
The desired channel is selected via.

When disassembling the channel selection device switch 1, remove it from the case board 23 and disassemble the case 12.
If the J-ring 10 is removed and the tuning shaft 6 is pressed and slid toward the rear of the frame 2 to bring the flange 6d into contact with the boss 5,
The leaf spring 9 elastically returns to the free state.

Therefore, the C-ring 11, leaf spring 9, and retaining plate 7 can be easily removed in sequence.

In the above embodiment, the front part of the shaft part 6c of the channel selection shaft 6 has a flange part 6d.
In addition, in front thereof, a shaft portion having approximately the same diameter as the shaft portion 6c is provided.In short, the channel selection shaft 6 is provided with a shaft portion 6c that can be fitted into the shaft hole 5a of the boss portion 5. For example, as shown in FIG. 7, the flange portion 6d may be extended to the shaft end as a large diameter portion 6e, or as shown in FIG. Part 6
c may be extended as it is to the shaft end, or the ninth
As shown in the figure, the axial length of the shaft portion 6c may be made relatively small, and the portion of the shaft end from the shaft portion 6c may be formed into a small diameter portion 6f having a smaller diameter than the shaft portion 6c.

Any of these cases has the same advantages as the above embodiments.

In each of the above-mentioned embodiments, the tuning shaft 6 may be a hollow tuning shaft, and a central shaft may be further inserted into the hollow tuning shaft to form a double shaft structure.

In this case, the center shaft is axially positioned with respect to the hollow tuning shaft by a C ring or the like, and rotates separately from the hollow tuning shaft to perform functions such as volume adjustment.

As mentioned above, according to the rotary switch of the present invention,
When the rotating shaft is at any position relative to the frame, the holding plate, ball,
After assembling the leaf spring and first retaining ring (C-ring), insert the rotating shaft through the frame and pull it out to the fixed position, and then assemble the second retaining ring (C-ring) to the rotating shaft on the front side of the frame. Because of this, the leaf spring is elastically deformed when the rotating shaft is pulled out, so there is no need for the troublesome work of assembling it while elastically deforming it, making assembly and disassembly work extremely easy and accurate. Since the leaf spring is plate-shaped and has a small thickness, the axial dimension of the day tent mechanism can be reduced, which allows the switch to be made smaller, and only one retaining plate and one leaf spring are required. It has the advantage of reducing the number of points and simplifying the configuration.

[Brief explanation of drawings]

1 and 2 are an exploded perspective view and a partially cutaway side view of the assembled state of a switch for a channel selection device to which an embodiment of the rotary switch according to the present invention is applied, respectively, and FIGS. 3A and 3B are 4 is a rear view of the holding disc, FIG. 5 is a view taken along line A-A in FIG. 2, and FIG. , B are front and rear views of the disk case halves, respectively, and FIGS. 7 to 9 are partial side views showing essential parts of other embodiments of the channel selection shaft used in the above switch, respectively. 1... Switch for channel selection device, 2... Frame, 3...
... Frame portion, 3a... Concave portion, 7a... Convex portion, 4
... Daytent part, 4a... Daytent positioning groove, 5... Boss part, 5a, 1 4a, 22a - shaft hole,
5b EEE mounting screw part, 6... Tuning axis, 6a, 6b
... Outer circumferential groove, 6c... Shaft part, 6d... Flange part, 6e
...Large diameter part, 6f...Small diameter part, 7...Ball holding disc, Ta...Protrusion part, 8...Ball, 9...Plate spring, 9a...Bridge part, 10, 11... C ring, 11a... Handle, 12... Disc case, 1
2a, 12b...Case half-closed, 13...Disc,
DESCRIPTION OF SYMBOLS 14... Case, 15 (151-154)... Terminal, 16... Holder plate, 20a... Insulating part, 21...
...Conductive part, 22...Case holder, 23...Case board, 25...Nut.

Claims (1)

[Claims] 1. In a rotary switch that switches contacts in a detent manner by appropriately rotating a rotary shaft inserted through a frame having a detent positioning mechanism and a contact switching mechanism, the detent positioning mechanism has a detent positioning mechanism that has a concentric circle with the rotary shaft on the inner surface of the frame. a plurality of detent positioning grooves formed on the circumference, and a retainer plate and a leaf spring that are fitted in a stacked manner inside the frame with their circumferential and axial positions restricted, respectively, with respect to the rotating shaft; It consists of a rotating member held by the holding plate and pressed by the leaf spring to be press-fitted into the positioning groove, and the rotation axis is provided with first and second rotational axes at positions corresponding to the inside and outside of the frame, respectively. The rotary shaft has a second outer circumferential groove, and the first retaining ring is engaged with the first outer circumferential groove in advance, and the leaf spring is attached to the second outer circumferential groove side of the first retaining ring. , when the holding plate having the transfer member is fitted and the rotating shaft is inserted into the frame from the inside of the frame, the rotating shaft is elastically deformed by the regulation of the first retaining ring by the plate spring. and the second retaining ring is engaged with the second outer circumferential groove protruding to an outside position of the frame. Features rotary switch.