JPS6224901Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Use The present invention relates to a rotary switch, which can be applied to, for example, a transceiver tuning device for 40 channels.

Problems to be solved by conventional techniques and inventions Conventional rotary switches have been proposed, for example, by
It has a structure as described in Publication No. 20514, and the rotary disk that is fitted with the rotating shaft and rotates integrally with the rotating shaft has a movable contact only on the frame side surface of the rotary switch, The fixed terminal is provided so as to contact only one side of the rotary disk. For this reason, the rotating disk rotates while being biased in the axial direction by the fixed terminal, which tends to cause unstable rotation.Also, the rotating disk comes into contact with the inner wall of the case and rotates while rubbing against the inner wall. The problem was that the torque required for the switch increased, making it difficult to operate the switch.

Furthermore, Japanese Utility Model Publication No. 47-12472 shows a configuration in which a plurality of fixed contacts contact both sides of a rotating disk, but the fixed contacts are not arranged to face each other, but rather The fixed contacts on one side and the fixed contacts on the other side are in contact with different positions on the rotating disk when viewed from the rotation axis direction of the rotating disk. For this reason, the rotating disk has
A force is applied in the direction of rotation about the axis perpendicular to the rotation axis, and the rotating disk may deform over many years. Another problem was that it was prone to instability.

Further, the rotary shaft detent mechanism is not generally completed by assembling the rotary shaft to the frame, and there is also the problem that assembly of the rotary switch is troublesome.

The object of the present invention is to provide a rotary switch that solves the above problems.

Means for Solving the Problems The present invention has a structure in which a case containing a rotary disk having movable contacts on both sides is fixed to a frame, and the rotary disk is rotated integrally by a rotating shaft supported by the frame. In addition to being equipped with a day tent mechanism that is integrally provided with the rotating shaft,
A plurality of fixed terminals are arranged along the inner surface of the case and are in contact with both sides of the rotary disk, and extend in the direction of both sides of the rotary disk and are located at substantially the same location on the rotary disk when viewed from the direction of the rotation axis. The configuration is such that they are placed opposite each other so as to be in contact with each other.

Operation The fixed terminal arranged as described above is brought into a state in which the force on the rotary disk in the direction of the rotation axis and the force in the direction of bending the rotary disk are canceled. In particular, the structure in which the fixed terminal is extended in the direction of the rotating surface of the rotary disk contributes to making the rotary switch thinner. Furthermore, the detent mechanism having the above structure improves assembly efficiency.

Embodiment Next, an embodiment of the present invention will be described. 1st
2 and 2 are an exploded perspective view and a partially longitudinal side view of an assembled state of a channel selection device to which an embodiment of the rotary switch according to the present invention is applied, respectively. 2 is a frame of the channel selection device 1, as shown in FIG. 3A and B,
The frame portion 3, detent portion 4, boss portion 5, etc. of a rectangular plate are integrally die-cast.
The detent section 4 is formed by, for example, 40 radial detent positioning grooves 4a arranged circumferentially at the outermost periphery of a circular recess 3a on the back surface of the frame section 3. The boss portion 5 on the front surface of the frame portion 3 has a shaft hole 5a formed therein, and a threaded portion 5b for attaching the device 1 to the outer periphery thereof. Therefore, according to this frame 2, the conventional frame part 3, daytent part 4, boss part 5
Compared to the case where the parts are manufactured separately and assembled, the accuracy can be improved without causing errors in the assembly. Further, the frame portion 3 is provided with a convex portion 3b, a pair of notched concave portions 3c, and a through hole 3d.

6 is a tuning shaft having an end 6a, outer circumferential grooves 6b, 6c,
It has a stepped portion 6d, and is rotatably fitted and inserted into the shaft hole 5a of the frame portion 3 from the front of the frame, and projects rearward.

Reference numeral 7 designates a ball holding disc, which has a pair of protrusions 7a on its back surface and a pair of U-shaped notches 7b into which steel balls 8 are respectively fitted on its outer periphery, as shown in FIG. The channel selection shaft 6 is fitted into the channel selection shaft 6 from the rear so as to rotate integrally with the channel selection shaft 6, and is housed in the recess 3a of the frame 2. Reference numeral 9 denotes a leaf spring, which is loosely fitted from the rear to the tuning shaft 6 and housed in the recess 3a, as shown in FIG. The ball 8 is elastically deformed by the C-rings 10 and 11 that are engaged with the outer circumferential grooves 6b and 6c of the detent positioning groove 4a, and the ball 8 is pressed into engagement with the detent positioning groove 4a. In this case, as shown in FIG.
It is engaged between the pair of protrusions 7a. Therefore, the assembly positioning itself becomes easy and each part 7, 9, 1
1 rotates smoothly and integrally with the tuning shaft 6 without play, and the contact force of the ball 8 is always constant.
The torque during rotation is also stable, allowing for smoother rotation.

When assembling each of the above parts 2, 6 to 11,
In Figure 2, first select the channel selection axis 6 from the front side of the frame 2.
When inserted and slid in the direction of arrow A until the outer periphery flange 6a abuts against the boss 5, the groove 6b,
6c reaches the position shown by the dashed line in the figure. Therefore, after attaching the holding disk 7, ball 8, and leaf spring 9, the C-ring 11 is engaged in the groove 6c. At this time, the C-ring 11 can be easily engaged in the groove 6c without the need to elastically deform the leaf spring 9. After that,
While elastically deforming the plate spring 9, move the tuning shaft 6 in the direction of arrow B.
The C-ring 10 is engaged with the groove 6b seen in the vicinity of the boss portion 5 by pulling each component in the direction shown in FIG. By providing the stepped portion 6d on the tuning shaft 6 and making it slidable in this way, the difficult work of assembling the parts while elastically deforming the leaf spring 9 is not necessary, and the assembly work becomes extremely easy.

According to this, the stacked structure of the holding disc 8 and the leaf spring 9 is extremely thin, so that the axial dimension of the channel selection device 1 can be made small. The score will also be small. Moreover, since each of the above parts 2, 6 to 11 is integrated as a unit,
Handling and subsequent assembly work become easier.

12 is a disk case, a pair of case halves 1
A disk 13 is housed between 2a and 12b.
As shown in FIGS. 6A and 6B, the case half 12b consists of a case 14 and terminals 15 (15 ₁ to 15 ₄ ). The case 14 is provided with a shaft hole 14a in the center,
In addition, there is a recess 14b, a pin 14c on the inner surface (front in the figure),
A pin hole 14d and a through hole 14c are provided,
Ring-shaped recess 14j and recess 1 on the outer surface (back side in the figure)
4k is provided.

As shown in FIGS. 6A and 7, the terminals 15 (15 ₁ to 15 ₄ ) are formed by pressing a single conductive thin plate, and each has a contact portion 15 b having a contact point 15 a on the upper portion, which is bent. Further, a terminal portion 15c bent into a U-shaped cross section is formed at the lower part.
Each terminal 15 (15 ₁ to 15 ₄ ) is held in the recess 14 b of the case 14 by a holder plate 16 and arranged along the inner surface of the case 14 , and extends substantially parallel to the opposing surface of the disk 13 . ing. Since the terminal portion 15c of the terminal 15 is formed to have a U-shaped cross section, it is strong against unnecessary bending force and is not easily deformed or damaged.

The other case half 12a is also the case half 12b.
However, as shown in FIG. 1, a ring-shaped convex portion 14f and a convex portion 1 are provided on the outer surface (front in the figure).
The difference is that 4g is provided. case half 1
When assembling 2a and 12b, the disk 13 is housed in the recess 14b so as to face each inner surface, and the pin portion 14c is fitted into the pin hole 14d to bring them into close contact and integrate, thereby forming the disk case 12. do.

The disc case 12 has the tuning shaft 6 relatively fitted into the shaft hole 14a, and the ring-shaped protrusions 14f and 14g of the case half 12a are connected to the frame 2, respectively.
It can be easily positioned and assembled to the frame 2 by fitting into the recess 3a and the notch recess 3c. 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 disc 20. It becomes. Both sides of the disk 13 are connected to the terminals 1 of the case halves 12a and 12b.
5 (15 ₁ to 15 ₄ ), and as the disc 13 is rotated by the tuning shaft 6, the manner in which each terminal contacts the pattern changes, thereby switching channel signals.

Terminals 15 (15 ₁ to 15
₄ ) and the terminals 15 (15 ₁ to 1
5 ₄ ) are arranged opposite to each other so as to contact substantially the same location on both surfaces of the disk 13 when viewed from the axial direction of the channel selection shaft 6.

In manufacturing the disk 13, first, a raw material of a predetermined thickness is formed on both sides of a baking base material, and then a thin steel plate of, for example, about 35 μm in thickness is provided on both sides, and this thin plate is photo-etched into a predetermined pattern. Leave a conductive part. Thereafter, the conductive portion is buried in the green material by heating and applying a pressure roller, so that the conductive portion and the insulating portion are on the same surface, and this is appropriately punched out to obtain the disk 13. According to this, when each contact 15a of the terminal 15 slides on the insulating part 20a and the conductive part 21, it moves smoothly under the above-mentioned condition of the same surface. Compared to the case where the contact point 15a remains protruding from the surface by that thickness, the switching contact position may shift, noise may occur in the switching shock, or the contact 15a,
The conductive part 21 will not be worn out.

22 is a metal rectangular plate-shaped case holder.
The rear end of the tuning shaft 6 is relatively fitted into the shaft hole 22a to support it. Also case holder 22
The locking claw portions 22b bent at the four corners of the disk case 12 and the through holes 14e, 3 of the frame 2
The disk case 12 is attached to the frame 2 and held by caulking the tip which is inserted through the hole d and protrudes from the front surface of the frame 2. This case holder 2
According to holder 2, the mounting method is simple and
2 itself also serves as a bearing, and the mold cost is low and it can be manufactured at low cost.

To attach this channel selection device 1 to a transceiver case, insert the boss portion 5 of the device 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 is fitted, and the convex portion 3b of the frame 2 is engaged with the hole 23b for positioning and mounting to prevent rotation, and the nut 25 is tightened to the mounting threaded portion 5b via the washer 24.

In the channel selection device 1 assembled as described above,
When the tuning shaft 6 is rotated to select a desired channel, the tuning shaft 6, the holding disc 7 that holds the ball 8, the leaf spring 9, and the disc 13 rotate together, and the ball 8 engages with the detent recess 4a of the detent portion 4 corresponding to the desired channel. As a result, each terminal 15 (15 ₁ to 15 ₄ ) of the disk 13 is brought into contact with the channel pattern, and each terminal 15 (15 ₁ to 15 _{4 ) is contacted via a circuit (not shown) connected to the terminal 15 (15 1 to 15 4} ). The desired channel is selected.

In the above embodiment, the disk case 12
is one piece, but two or more pieces may be stacked in the axial direction. In this case, by mutually engaging the side protrusions 14f, 14g and the recesses 14k, 14j of each case 12, They are positioned, stacked and assembled in sequence.

Effects of the Invention As described above, according to the rotary switch of the present invention, the rotary disk has movable contacts on the first surface on the frame side and the second surface on the opposite side to the frame, and the fixed terminal rotates. Since the fixed terminals are arranged to face each other so as to abut on the first and second surfaces of the disk, the fixed terminals come into contact with the rotating disk so as to sandwich it between them, and the fixed terminal comes into contact with the rotating disk. In this state, the force in the axial direction of the rotating shaft is canceled out, and the bending force is also canceled out, and the rotating disk rotates stably with a light force without being pressed against the inner wall of the case, but away from the inner wall of the case. The fixed terminals are arranged along the inner surface of the case, and are connected to both the first and second directions of the rotating disk. Because it is extended, the fixed terminal can be installed in a narrow space in the direction of the rotation axis, and the use of a rotating disk with movable contacts on both sides makes the switch thinner in the direction of the rotation axis. Furthermore, since the detent mechanism is integrated with the frame and rotating shaft, the frame and rotating shaft including the detent mechanism are integrated into a unit, making it easy to assemble the case and rotating disk. , it has features such as facilitating rotary switch assembly work and assembly process management.

[Brief explanation of the drawing]

1 and 2 are an exploded perspective view of a channel selection device to which an embodiment of the rotary switch of the present invention is applied, a partially vertical side view of the assembled state, and FIG.
Figures A and B are rear and partially cutaway side views of the frame constituting the above device, Figure 4 is a rear view of the holding disk,
5 is a view taken along the line A--A in FIG. 2, FIGS. 6A and 6B are front and rear views of the disk case half, respectively, and FIG. 7 is a side view of the terminal. DESCRIPTION OF SYMBOLS 1... Tuning device, 2... Frame, 3... Frame part, 3a, 14b, 14j... Recessed part, 3b, 7a,
14f, 14g...Convex portion, 3c, 14k...Notch recess, 3d, 14e...Through hole, 4...Daytent portion,
4a...Daytent positioning groove, 5...Boss part, 5
a, 14a, 22a...Shaft hole, 5b...Mounting screw part, 6...Tuning shaft, 6b, 6c...Groove, 7...Ball holding disc, 7a...Protrusion, 7b...Notch, 8...Ball, 9 ...Plate spring, 9a...Bridge part, 10, 11
...C ring, 11a...handle, 12...disc case, 12a, 12b,...case half, 13...disk, 14...case, 15 (15 ₁ to 15 ₄ )...
Terminal, 15a... Contact, 15c... Terminal part, 16... Holder plate, 20a... Insulating part, 21... Conductive part, 22
...Case holder, 22b...Latching claw portion, 23...Case board, 25...Nut.

Claims (1)

[Scope of utility model registration request] a frame, a rotating shaft inserted through a hole in the frame with its axial position regulated, a detent mechanism provided integrally with the frame and the rotating shaft, and fixed to one side of the frame. a case having movable contacts on a first surface on the frame side and a second surface on the opposite side from the frame, and is rotatably housed in the case and rotated integrally with the rotating shaft. a rotating disk; a plurality of first fixed terminals that contact the first surface of the rotating disk and the movable contacts switch; and a plurality of first fixed terminals that contact the second surface of the rotating disk and switch the movable contacts; a plurality of second fixed terminals in contact with each other, the plurality of first and second fixed terminals are arranged along the inner surface of the case, respectively, and in the direction of the first and second surfaces of the rotary disk; A rotary switch configured to extend and be disposed facing the first surface and the second surface so as to abut on the first surface and the second surface.