JPS584344Y2 - Axis rotation mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a shaft rotation mechanism that is useful when applied to, for example, a channel selection device used in a radio receiver. In a mechanism configured to rotate a shaft by a predetermined angle via a rocking body integrally attached to the shaft by pressing a pair of operating members attached to the scale plate, one Even if the operating member is pressed and one of the two protrusions formed on the rocking body is rotated to a predetermined position and the shaft is rotated by a predetermined angle, the other operating member The present invention proposes a shaft rotation mechanism that is constructed so as to be completely unaffected by pressing operations.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a perspective view of a main part showing a preferred embodiment in which the shaft rotation mechanism of the present invention is applied to a channel selection device of a radio receiver, and FIG. 2 is a perspective view of one operating member associated with a swinging body. FIG. 3 is a perspective view showing the operating rod of the operating member and the stopper member, FIGS. 4 and 5 are front and rear views showing the stopper member, and FIG. 6 is an enlarged sectional view showing the installation state. 7 is a partially omitted plan view showing the tip of one operating member and the rocking body, and FIGS. 7 and 8 schematically illustrate the operating state of the pair of operating members and the shaft rotated thereby. FIG. 3 is an operating state diagram shown in FIG.

As shown in Fig. 1, on the surface of a scale plate 1 housed inside the radio receiver, there are scales 2, 3 (
In this example, the upper scale 2 is for FM, and the lower scale 3 is for AM.

), and a pair of guide rail portions 4 and 5 are formed on the rear surface to protrude vertically at a predetermined interval.

On one side of the former scales 2 and 3, that is, on one end of the scale plate 1, a U-shaped mounting plate 6 is fixed integrally or with fixing screws. As shown in FIG. 2, a pair of operating members 8.9 are attached via a fixing plate 7 made of a material such as synthetic resin so as to be reciprocally movable.

In this example, the operating member 8 attached to the upper part is for TM, and the operating member 9 attached to the lower part is for AM.

The pair of operating members 8 and 9 have the same shape.

Here, the configuration will be described using FIG. 2, which shows an enlarged view of the operating member for AM. A rod 11 (see Fig. 3), a connecting rod 12 whose diameter is larger than that of the operating rod 11, and a U-shaped operating rod 13 (see Fig. 6) provided at the tip of this connecting rod 12. , the above operating rod 1
1, and a knob portion 14 attached to one end of the handle.

In the operating member 9 shown in FIG. 2, the knob portion 14 and the operating rod 11 are connected with adhesive, and the operating rod 11 and the connecting rod 12 are integrally formed. ,
The connection between the knob portion 14 and the operating rod 11 is not limited to this,
For example, they may be connected by a screwing method, or the operating rod 11 and the connecting rod 12 may be formed separately and connected integrally.

Between one side 12a of the connecting rod 12 of the operating member 9 having such a configuration and one side 15a of the annular portion 15 formed to protrude from the fixed plate 7, there is a space between the one side 12a of the connecting rod 12 of the operating member 9 and the one side 15a of the annular portion 15 formed to protrude on the fixed plate 7. A movable cylindrical body 16 is interposed.

Further, a cross-shaped protrusion 10 of the operating rod 11 of this operating member 9
A stopper member 17 and an elastic member 1 such as a coil spring are installed between the side surface 15b of the fixed plate 7 and the protrusion 10 side.
They are interposed in the order of 8.

Since this elastic member 18 elastically biases in the left-right direction, the knob portion 14 of the operating member 9 is always elastically biased in the direction of the arrow in FIG.

Therefore, when the operating member 9 is moved forward, that is, when the knob portion 14 is pressed against the elastic member 18 in the direction of arrow B in FIG. When the pressing force is released, the knob portion 14 self-returns to its original position before being pressed due to the resilient force of the elastic member 18.

In addition, a stopper member 17 attached to the operating rod 11 in order to receive the elastic force of the elastic member 18 and operate the operating rod 13 has a stopper member 17 that penetrates through the central portion, as shown in FIGS. 3 to 5. It is mainly composed of a thick cylindrical part 20 in which a hole 19 is formed, and on the inner circumferential surface of the through hole 19 of this cylindrical part 20, there is formed a protruding part on the outer circumferential surface of the operating rod 11 of the operating member 9. There are provided four notches 21 through which the cross-shaped projections 10 can be inserted, and four grooves 22 formed between the notches 21 into which the projections 10 are inserted.

Here, an example of the order in which the operating member 9 is attached to the plate 6 will be explained based on FIG. 2.

First, the fixing plate 7 is attached to the plate 6 integrally attached to the scale plate 1.

At this time, the installation is carried out using large and small through holes 23 at appropriate positions on the plate 6.
24 are formed, so if the annular portion 15 and protrusion 25 formed on the fixing plate 7 are fitted into the through holes 23 and 24, the verification plate 7 can be easily positioned and attached to the plate 6. will be installed on the

Next, the operating rod 11 of the operating member 9 to which the cylindrical body 16 is attached
a through hole 15a' formed in the annular portion 15 of the fixing plate 7;
After that, an elastic member 18 made of a coil spring or the like is attached to the operating rod 11.

After the elastic member 18 has been attached, the stopper member 17 is attached to the operating rod 11 from the direction of arrow B in FIG.

The stopper member 1 is arranged so that the cross-shaped protrusion 10 of the operating rod 11 and the notch 21 of the stopper member 17 correspond to each other.
Correct the position of 7 as appropriate and if they are compatible with each other,
In this state, the stopper member 17 is forcibly pressed toward the fixed plate 7 against the elastic force of the elastic member 18.

Once the one side surface 17a of the stopper member 17 has been moved to a position closer to the fixed plate 7 than the one side surface 10a of the cross-shaped projection 10, the stopper member 17 is then rotated by an angle of 45 degrees.

When the rotation is completed and the pressing force on the stopper member 17 is released, the cross-shaped protrusion 10 is splined into the groove 22 of the stopper member 17, and its movement is blocked at the bottom 22a of the groove 22. be done.

Therefore, the elastic force of the elastic member 18 acts on the stopper member 17 and the cross-shaped protrusion 10 to constantly move the operating rod 11 in the direction of the arrow in FIG.

Next, an adhesive is applied to one end of the operating rod 11 to attach and fix the knob 14, thereby completing the attachment of one operating member 9 to the plate 6.

The other operating member 8 is also attached in the same order as above.

As mentioned above, the operating member 8゜9 used in the present invention includes:
By providing the cross-shaped protrusion 10 formed on the operating rod 11 and the stopper member 17 attached thereto, the operation of attaching the operating members 8 and 9 to the plate 6 becomes extremely efficient. .

On the other hand, as shown in FIG. 1, on the upper and lower surfaces of each guide rail portion 4, 5 formed on the back surface of the scale plate 1, ■-shaped grooves 4a, 5a are formed along the longitudinal direction. There is.

On each guide rail portion 4, 5, the grooves 4a, 5a are provided.
protrusion 26.2 inserted in a loosely interlocking state;
A large number of markers 27 and 28 having the number 6 are provided.

The markers 27 and 28 are set at the positions of the scales 2 and 3 for displaying the desired receiving frequency (this is called a preset), and have the function of serving as a mark indicating the desired receiving station. In this case, the marker 27 placed at the top is used for FM, and the marker 28 placed at the bottom is used for AM.

These markers 27 and 28 are each made of a material such as synthetic resin and have the same shape, and are connected to one FM.
To describe its structure using a motherboard 2, it consists of an indicator part 29 that is formed to hang down to indicate a predetermined scale 2 formed on the surface of the scale plate 1, and the upper and lower surfaces of the upper guide rail part 4. The FM mother car 2 is constituted by a U-shaped holding part 30 which is pressed against the top and bottom of the guide rail part 4 for attaching the marker 27 itself to the guide rail part 4.

The latter holding portion 30 is formed with the above-mentioned protrusion 26 .

Each marker 27, 28 having such a configuration can be freely moved in the longitudinal direction of the scale plate 1 while being guided by the grooves 4a, 5a of the scale plate 1 as necessary and placed at a predetermined position. ing.

On the back surface of the scale plate 1 and between both ends of each of the guide rail parts 4.5, a pair of bearing parts 31 that stand upright with respect to the scale plate 1 are formed to protrude. A long guide shaft 32 is rotatably attached parallel to the scale plate 1.

Note that four portions 32a (see FIG. 2) are formed on the outer peripheral surface of the guide shaft 32 along its longitudinal direction.

A recess 3 of the guide shaft 32 is provided at one end of the guide shaft 32.
A locking protrusion 33 a provided on the inner circumferential surface of the rocking body 33 at 2 a
A rocking body 33 is integrally fixed by fitting the rocking body 33, and a pair of protrusions 34 and 35 are formed to protrude in the diametrical direction on the outer peripheral surface of the rocking body 33.

These projections 34, 35 are inserted into the U-shaped working rods 13, 13 of each of the aforementioned operating members 8, 9.

The rocking body 33 having each projection 34,35 is rocked in a predetermined direction by a pressing portion 36 that constitutes the operating rod 13.13 of each operating member 8.9.

That is, when one operating member, for example, the knob 14 of the AM operating member 9 is pressed, the pressing portion 36 of the action rod 13 comes into contact with the protrusion 35 provided on the lower side of the rocking body 33 and presses the protrusion 35. .

Therefore, the protrusion 35 is pushed in the direction C in FIG. 2, and the swinging body 33 is swung in the direction of the arrow C in FIG. 2 with the guide shaft 32 as a fulcrum.

Therefore, the guide shaft 32 to which the rocking body 33 is integrally fixed is rotated in the same direction as the rocking body 33.

In addition, the amount of movement of each operating member 8, 9 required for each operating member 8, 9 to rotate the guide shaft 32 by a predetermined angle during forward movement is determined by the amount of movement of each operating member 8, 9 required for rotating the guide shaft 32 by a predetermined angle. This projection 35 is moved by the pressing portion 36 to a predetermined amount by an amount of ineffective movement of the pressing portion 36 corresponding to the play between the pressing portion 36 and the projection 35 until it comes into contact with one of the projections being pressed (for example, the projection 35). At least the amount of movement added to the effective amount of movement of the pressing part 36 until the knob 14 is activated to the desired position is required, but each operating member is adjusted so that this required amount of movement is achieved when the knob part 14 is pressed to its maximum. 8 and 9 are formed.

Returning to FIG. 1, a pointer stand 38 having a hollow interior is mounted on the guide shaft 32 so as to be freely movable in the longitudinal direction of the guide shaft 32.

An L-shaped pointer 39 is fixed to the head of the pointer stand 38 with a set screw 40, and a stopper part 41 is attached to the front part.
is formed protrudingly.

This stopper part 41 has its tip inserted into a groove 42 formed along the longitudinal direction of the scale plate 1 in the middle part of the back surface of the scale plate 1, and interacts with this groove 42 to stop the pointer base
8 itself is attached to the guide shaft 32 in the direction of arrow C or D in FIG.
It functions so that it does not move along with the rotation.

A catcher member 43 attached to the guide shaft 32 is housed inside the pointer stand 38 .

This catcher member 43 can freely move together with the pointer stand 38 in the longitudinal direction of the guide shaft 32 (in the arrow hole or direction B in FIG. 1).

However, the catcher member 4 can rotate freely in the direction in which the guide shaft 32 rotates, and the catcher member 4 can rotate in the same direction (direction C or D in FIG. 1) as the guide shaft 32 rotates.
3 is formed with a protrusion 44 that is inserted into the groove 32a formed in the guide shaft 32 (see FIG. 7).

A catch rod 45 is formed in such a catcher member 43, and its tip 45a is used for FM and AM.
The markers 27, 28 are inserted into through holes 46, 46 formed in the clamping portions 30, 30 of each of the markers 27, 28, so that the markers 27, 28 can be moved to the position of the desired reception station.

The catch rod 45 of the catcher member 43 is attached to the guide shaft 32 so as to be substantially orthogonal to each projection 34, 35 of the rocking body 33.

Next, the operation of the rotation mechanism of the present invention having the above configuration will be explained.

First, in the state of the operating member 8°9 before pressing as shown in FIG. 7, one operating member, for example, the AM operating member 9
The knob portion 14 of the elastic member 18 is pressed against the elastic force of the elastic member 18, whereby the operating rod 11. Connecting rod 12 and working rod 13
7, the pressing portion 36 forming the working rod 13 presses the protrusion 35 at the bottom of the swinging body 33, which is integrally attached to the guide shaft 32, thereby causing the swinging The moving body 33 rotates in the direction of arrow A, as shown in FIG. 8, about the guide shaft 32 as a fulcrum.

When the rocking body 33 rotates as described above, this rocking body 33
is integrally attached to the guide shaft 32, so the guide shaft 32 also rotates in the same direction as the swinging body 33.

When the guide shaft 32 rotates, since the catcher member 43 is mounted on the guide shaft 32, the catcher member 43 also rotates in the same direction as the guide shaft 32.

Therefore, the knob portion 1 of such an AM operation member 9
4, by turning a tuning knob (not shown) in advance, the pointer stand 38 is moved in the longitudinal direction of the guide shaft 32 via the tuning thread 47,
The tip 45a of the catch rod 45 of the catcher member 43 that moves along with the pointer stand 38 is aligned with, for example, one AM mother car 28, and when they are aligned, the AM As shown in FIG.
It is inserted into a through hole 46 formed in the holding part 30.

Therefore, the catcher member 43 and the AM mother car 2
8 is in the connected state, so if the catcher member 43 is moved in the longitudinal direction of the guide shaft 32 by turning the tuning knob while pressing the knob 14 of the AMM action member 9, this will cause The marker 28 is forcibly moved in the longitudinal direction of the guide rail portion 5.

When the marker 28 stops moving at the position of the scale 3 corresponding to the desired receiving station, the AM marker 28 is easily preset to the position of the desired receiving station.

On the other hand, when the pressing force of this operating member 9 is released, the operating rod 1
The return acting part 37 of No. 3 is installed with the protrusion 35 of the oscillating body 33 hooked to guide the protrusion 35 toward the plate 6. Therefore, the protrusion 35 is pulled back to its original state before rotation by the action part 37. be returned.

Since the FM operating member 8 is also the same, the description thereof will be omitted.

Therefore, when the operating members 8 and 9 are not pressed, each return action portion 37 is in an engaged state with each protrusion 34, 35 of the rocking body 33.

In this way, each of the operating members 8 and 9 has the function of rotating the guide shaft 32 in a predetermined direction, but in addition to this, the operating members of the present invention are designed to fully meet the following requirements. It is being carried out.

First, one operating member, for example, AM as shown in FIG.
Even when the operating member 9 for FM is pressed to the maximum, the protrusion 34 formed on the upper part of the rocking body 33 operates and presses the pressing portion 36 formed on the operating rod 13 of the other operating member 8 for FM. Each protrusion 34.
35 and the pressing parts 36 and 36 of the pair of operating members 8 and 9 are required to be set in a predetermined positional relationship. When one of the protrusions 35 pressed by the pressing portion 36 of the operating member 9 operates to a sufficient extent to rotate the guide shaft 32 by a predetermined angle, the corresponding position of the other protrusion 34 changes. Each protrusion 34, 35 and the pressing part 3 are arranged in a positional relationship such that they do not come into contact with the pressing part 36 of the other operating member 8.
6 is set.

Next, in normal times, the tip portion 45a of the catcher rod 45 of the catcher member 43 is connected to each guide rail portion 4,5.
It is required to be located in the fixture between each guide rail part 4, 5 so as not to contact the markers 27, 28 placed above and cause them to move unnecessarily.

For this purpose, it is required that the concave groove 32a formed on the outer peripheral surface of the guide shaft 32 faces toward the groove 42 formed on the back surface of the scale plate 1.

In order to satisfy these requirements, the present invention provides that when the knob portions 14.14 of either of the operating members 8, 9 are in a non-pressed state, the return action of both operating rods 13.13 is provided. 37.37 pulls each protrusion 34.35 of the oscillator 33 back toward the scale plate 1, and each protrusion 34.35
Position it vertically in Figure 7 as shown in the figure,
This adjusts the catch rod 45 of the catcher member 43 so that it always faces leftward in FIG.

As is clear from the above configuration, according to the shaft rotation mechanism according to the present invention, even when the knob of one operating member is pressed to the maximum in order to rotate the shaft by a predetermined angle, , the other protrusion formed on the opposite side of one protrusion of the rocking body pressed by the press part of the operating rod provided at the tip of the member does not press the press part of the other operating member.

Therefore, the knob portion of the other operating member does not unnecessarily protrude toward the operator.

Further, according to the present invention, a return action section is provided on the action rod for the tip end of the pair of operating members, and an elastic member is provided so that the action section automatically returns to the scale plate side. Although the position of the guide shaft can always be maintained at the normal position under normal conditions, for example, when the present invention is applied to a preset tuning device as described in the above embodiment, the tip of the catch rod of the catcher member can be It can always be located at an intermediate position between the upper and lower guide rail parts.

Therefore, when the pointer stand is arbitrarily moved in the longitudinal direction of the guide shaft by turning the tuning knob, there is no possibility of accidentally moving the marker that has been properly preset to the position of the receiving station.

Furthermore, according to the present invention, even if both operating members are pressed inadvertently, the pressing part of the operating rod simultaneously presses each protrusion of the rocking body, so the shaft will not rotate. It has various effects such as no

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a main part showing a preferred embodiment in which the shaft rotation mechanism of the present invention is applied to a channel selection device of a radio receiver, and FIG. 2 is a perspective view of one operating member associated with a swinging body. FIG. 3 is a perspective view showing the operating rod of the operating member and the stopper member, FIGS. 4 and 5 are front and rear views showing the stopper member, and FIG. 6 is an enlarged sectional view showing the installation state. is a partially omitted plan view showing the tip of one of the operating members and the assisting body, and FIGS. 7 and 8 are implicitly showing the operating states of the pair of operating members and the shaft rotated by them. FIG. 1... Scale plate, 2, 3... Scale, 4,
5...Guide rail part, 8, 9...Pair of operating members, 13...Working rod, 27°28.
... Marker, 32 ... Axis (guide axis)
, 33... Rocking body, 34.35... Each protrusion of rocking body, 36... Pressing part, 37...
...Return action part, 43...Catcher part.

Claims (1)

[Scope of utility model registration request] A rocking body having a rotatably held shaft, a pair of protrusions integrally attached to the shaft and protruding in the diametrical direction, and a pair of protrusions arranged to correspond to each of the pair of protrusions. Each of these operating members has a pressing part that can press the corresponding protrusion to rotate the shaft in one direction during forward movement, and pull back the corresponding protrusion during backward movement to rotate the shaft in the other direction. It has a return action part that can be rotated in the direction, and when each of these operating members is not pressed, each return action part is in a state of engagement with each of the projections,
A shaft rotation mechanism characterized in that when one operating member is pressed to press one protrusion, the space between the other operating member and the other protrusion is in a free state.