JP2523293Y2 - Switching mechanism of hammering device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a striking device used for a timepiece or the like, and more particularly to a device capable of selecting a striking pattern.

[0002]

2. Description of the Related Art As a conventional switching mechanism of this type of striking device, there has been one disclosed in Japanese Utility Model Publication No. Sho 62-17840. In this switching mechanism, the cam driving the hammer is moved in the axial direction and the cams having different steps are engaged with the hammer, thereby changing the driving timing of the hammer and changing the striking pattern. . In particular, cams should be installed in phase to
A tongue piece is attached to the striking stick to prevent displacement
I'm trying.

[0003]

In the above-mentioned prior art, an operation of pushing and pulling a knob was required to move the cam in the axial direction. For this reason, there is a problem that it is slightly difficult to operate as compared with the operation of simply pressing a button or turning a knob. In particular, in order to automatically perform the switching operation, a driving means for moving the cam is required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a switching mechanism of a hitting device in which a switching operation is easier and which can be automated without adding a special driving means. It is in.

[0005]

The switching mechanism of the hitting device according to the present invention has an interlocking claw, and the first and second smokes are cammed.
Driving mechanism that can be driven simultaneously by the mechanism
The cam mechanism includes a rotating shaft capable of normal and reverse rotation,
A rotating body rotatably provided with the rotation of the rotating shaft,
An elongated hole which is loosely fitted to the rotating shaft and is concentric with the rotating shaft.
Having an end opposite to the hit ball of the first and second hammer;
The first, which shifts to the position to be hit by engaging,
The second cam and the rotating body are provided with different phases,
Engage with the long holes of the first and second cams and lock at the ends of the long holes
And the first and second smoks.
And the position for releasing the engagement of the first and second cams is different.
And engage at least in the direction of rotation to strike simultaneously
Positions are located at positions with overlapping phases on each other
And a projection .

[0006]

In accordance with the switching mechanism of the striking bell apparatus of the present invention, when the normal rotation of the rotary shaft, beginning first event, which is driven by the first cam is striking in, driven by subsequent second cams the 2 Sumok strikes. Therefore, the striking method at this time is an additional striking in which two striking sounds are generated successively. On the other hand, when the rotation axis is reversed, the first and second hammer hits almost simultaneously, and the hitting method at this time is simultaneous hitting in which two hitting sounds are generated almost simultaneously.

[0007]

1 is a plan view showing a switching mechanism of a striking device according to an embodiment of the present invention. FIGS. 2 and 3 are views of the switching mechanism shown in FIG. It is CC sectional view taken on the line of FIG. In order to make the shape of each part easy to understand, FIG.
Also, the cam is not shown in FIG.

The first and second smokes 2 and 4 in this embodiment have substantially the same L-shaped planar shape and are rotatably supported by a shaft 8 erected on a substrate 6. This first
And a ball 10 at one end of each of the second smokes 2 and 4,
At the other end side, first and second engaging levers 14 and 16 and a cam which will be described later are engaged.
Hammer levers 18 and 20 are provided. Also,
Return springs 24 and 26, one ends of which are engaged with the columns 22, are attached to the first and second smoks 2 and 4, respectively. The first and second smoks 2 and 4 are rotated counterclockwise in FIG. You are urging you to. Normally, the first and second smoks 2 and 4 are stationary in the state shown in FIG. 1 and the like when the holding bars 14 and 16 are engaged with the positioning pins 28. The first hammer 2 is also provided with an interlocking claw 29 with which a portion of the second hammer 4 facing the striking direction is engaged.

The first and second cams and the rotating body 3 are provided on a rotating shaft 30 driven by a driving means such as a motor and capable of rotating forward and backward.
2, 34, 36 are attached. The rotating body 36 is fixed to the rotating shaft 30, and the first and second cams 3
2, 34 are loosely fitted to the rotating shaft 30. In the first and second cams 32 and 34, first and second engagement pins 38 and 40 projecting from the side surface of the rotating body 36 are inserted into oblong holes 32a and 34a formed substantially at the centers thereof, respectively. The first and second engagement pins 38 and 40 rotate with the rotation. The engagement between the elongated holes 32a, 34a and the first and second engagement pins 38, 40 is based on the positional relationship between the first and second cams 32, 34 and the rotating body 36 during forward rotation and reverse rotation. It is for shifting the slightly, Shumokureba 1
When the first and second cams 32 and 34 are disengaged from each other,
When it comes to the outer shape R, the second through the long holes 32a and 34a
Since the first and second cams 32 and 34 are moved, the fall is smooth.
That can be done easily . Each of the first and second cams 32 and 34 has a fan shape obtained by dividing a circular plate into approximately 1/4, and the rotating body 36 has the first and second cams 32 and 34 arranged side by side. It has a substantially semicircular shape or a slightly smaller fan shape. The first cam 32 is arranged at a position where it can be engaged with the first smoke lever 18, and the second cam and the rotating bodies 34, 36 have a second smoke length longer than the first smoke lever 18 in the axial direction. 20, one or both of them are arranged at positions where they can be engaged simultaneously.

In this embodiment, a counter 42 is provided which counts the number of strokes and applies a signal for stopping or switching the rotation of the rotary shaft 30 to a control circuit or the like. Is engaged.

Next, the operation of the switching mechanism having the above configuration will be described with reference to FIGS. 4 to 8 and FIGS. 9 to 12.
First, the operation when the rotating shaft 30 is rotated forward (in this embodiment, clockwise in the drawing) will be described. In the state shown in FIG. 5, when the rotation shaft 30 is rotated forward, the first and second rotations are performed.
To rotate the engagement pin 38, 40 long hole 32a, the first and second cam 32 engages with the inner peripheral surface of the rotating direction end of the 34a, the rotating body and the rotation direction end of the first cam 32 The rotation in the rotation direction 36 is substantially aligned.

Therefore, as shown in FIG.
The hammer levers 18, 20 abut on the first cam and the outer peripheral surface of the rotating body almost simultaneously, and are pushed and moved in the direction of arrow D in the figure. For this reason, the first and second smokes 2 and 4 rotate around the shaft 8 to the position indicated by the two-dot chain line 44 in FIG.

Thereafter, as shown in FIG. 7, when the first hammer lever 18 reaches the end of the first cam 32 and is disengaged from the outer peripheral surface thereof, the return spring 24 shown in FIG. By the action, the first smoke 2 rotates to the position indicated by the solid line in the figure, and at this time, the hit ball 10 hits a hitting bar or the like, and a hitting sound is generated. At this time, the second smoke lever 20 is still kept engaged with the outer peripheral surface of the rotating body 36.

Thereafter, when further rotated, as shown in FIG. 8, the second smoke lever 20 is engaged with the outer peripheral surface of the second cam 34 together with the rotating body 36. Then, the second hammer lever 20 maintains the engaged state with the second cam 34 even when the engagement with the rotating body 36 is released.

The second smoke lever 20 is connected to the second cam 3
When the engagement state is released as shown in FIG. 4 after reaching the end of the second spring 4, the second hammer lever 4 also rotates to the solid line shown in FIG. Become. As described above, the hitting pattern when the rotating shaft 30 is rotated forward is a follow-up hit in which two hitting sounds successively occur.

Next, when the rotating shaft 30 is rotated in the reverse direction (counterclockwise rotation in the figure), as shown in FIG. 9, the first and second engaging pins 38, 40 are at the ends of the slots 32a, 34a in the rotating direction. The second cam 34 and the end of the rotating body 36 in the rotation direction are aligned at this time.

As shown in FIG. 10, the second cam and times
The ends of the rolling members 34 and 36 in the rotation direction are the second smoke lever 20.
And engages with it, the second smoke lever 20 is pushed and moved in the direction of arrow D in the figure, and the second smoke 4 rotates in the same manner as the operation described above.

Thereafter, as shown in FIG.
2 is engaged with the first smoke lever 18,
The smoke lever 18 also moves in the direction of arrow D in the figure,
The smoke 2 also rotates in the same manner as the second smoke 4. At this time, the second smoke lever 20 is engaged only with the rotating body 36.

Thereafter, as shown in FIG. 12, when the first and second hammer levers 18 and 20 are disengaged from the first cams and rotating bodies 32 and 36, as shown in FIG. The first and second smoks 2 and 4 rotate and strike at the same time. In this embodiment, the engagement between the second smoky lever 20 and the rotating body 36 is released before the engagement between the first smoky lever 18 and the first cam 32 is released. Further, at this time, since the second hammer 4 is configured to be prevented from rotating by the interlocking claws 29 of the first hammer 2, the engagement between the first hammer lever 18 and the first cam 32 is released. And the first and second smokes 2, 4 rotate simultaneously and strike. Thus, the hitting pattern when the rotating shaft 30 is reversed is a simultaneous hitting in which two hitting sounds are generated simultaneously.

[0020]

[Effect of the Invention] As described above, according to the present invention,
For example, the traditional smoke
While the rotation direction of the lever is one direction, the first and second
The cams 32 and 34 press and move the smoke levers 18 and 20
The phases to be overlapped are the positions to engage and disengage.
In the other direction, following
In the other direction of rotation, with simultaneous interlocking claws
Only by switching the rotation direction of the rotating shaft.
Can easily switch between follow-up and simultaneous strike
Things. In addition, due to the provision of escape by a long hole
Minimizes the effects of motor speed,
You can beat it. In addition, since the hitting pattern can be changed only by changing the rotation direction of the rotating shaft for rotating the cam, it is extremely simple and easy to operate a switch for reversing the rotating direction of a motor or the like for driving the rotating shaft. can do. Also, in the case of automatically switching the hitting pattern, the switching direction of the motor or the like for driving the rotating shaft can be simply switched without adding any special driving means, so that it is extremely simple and inexpensive. Can be automated.

[Brief description of the drawings]

FIG. 1 is a plan view showing a switching mechanism of a hitting device according to an embodiment of the present invention.

FIG. 2 is a view of the switching mechanism shown in FIG.

FIG. 3 is a view of the switching mechanism shown in FIG.

FIG. 4 is a sectional view taken along line CC of FIG. 1;

FIG. 5 is a cross-sectional view showing a state of first to third cams during normal rotation.

FIG. 6 is a cross-sectional view showing an engaged state between the first cam and the rotating body and the first and second hammer levers during forward rotation .

FIG. 7 is a cross-sectional view showing an engaged state of the rotating body and the second smoke lever during normal rotation and a state of the first smoke lever released from engagement with the first cam.

FIG. 8 is a cross-sectional view showing an engagement state between the rotating body and a second smoke lever during normal rotation.

FIG. 9 is a cross-sectional view showing a state of the first and second cams and the rotating body at the time of reverse rotation .

FIG. 10 is a cross-sectional view showing an engagement state between a second cam and a rotating body and a second smoke lever during reverse rotation .

FIG. 11 is a cross-sectional view showing an engagement state between the first cam and the rotating body and the first and second smoky levers during reverse rotation .

FIG. 12 is a cross-sectional view showing a state in which the engagement between the first cam and the rotating body and the first and second hammer levers is released at the time of reverse rotation .

[Explanation of symbols]

2 First smoke 4 Second smoke 18 First smoke lever 20 Second smoke lever 30 Rotating shaft 32 First cam 34 Second cam 36 Rotating body

Claims (1)

(57) [Scope of request for utility model registration] 1. A first and a second hammer having an interlocking claw.
Driving machine that can be driven simultaneously and additionally by driving the cam mechanism
In structure, the cam mechanism, forward and reverse rotatable rotating shaft, the rotating body provided rotatably with the rotation of the rotary shaft
And a long hole loosely fitted to the rotating shaft and concentric with the rotating shaft.
Having an end opposite to the hit ball of the first and second hammer;
The first, which shifts to the position to be hit by engaging,
The second cam and the rotating body are provided with different phases, and the first and the second
2 engages with the long hole of the cam, and is locked at the end of the long hole.
And the first and second smoks and the first and second
The position where the engagement of the second cam is released is changed, and at least
At the same time, the engaging positions overlap each other.
A switching mechanism for a hitting device, comprising: a projection disposed at a position having a matching phase .