JP2756236B2 - Hammering mechanism - 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 mechanism for striking a bell or a bar bell incorporated in a timepiece.

[0002]

2. Description of the Related Art Today's timepieces produce not only an electronic sound but also a clear sounding striking sound by hitting a bell, a bell or a stick with a ball. This striking mechanism,
In many cases, as shown in FIG. 9, a hitting ball 13 is arranged near a bell 11 or a bar bell, and the hitting ball 13 is supported by a swingable wooden body 15 and an elastic ball (not shown). With the body, the hitting ball 13 is urged in the direction of the bell 11, and the stopper 16 is provided at a position where the hitting ball 13 stops close to the bell 11, etc., and further, a link bar 17 which is linked to the hitting body 15 is provided. A cam body 21 having an outer periphery in contact with the link bar 17 and a notch 23 provided on the outer periphery is arranged.

Accordingly, when this cam body 21 is rotated by transmitting the rotation of a motor (not shown) to the cam body 21 using a reduction gear train or the like, the periphery of the cam body 21 contacts the link bar 17. To swing the link bar 17 around the swing shaft 19, and the swing of the link bar 17 causes the hitting body 15 to hit the ball.
13 is separated from the bell 11 against the elastic body, and when the end of the link bar 17 is located in the notch 23 formed in the cam body 21,
The ball 13 is returned to the direction of the bell 11 by the elastic body and the link bar
The end of the ball 17 falls into the notch 23 of the cam body 21, and the ball 13 hits the bell 11 by the momentum of the ball 13 returning.

It is to be noted that the collision body 15 is formed of an elastic material,
By fixing the end portion or the vicinity of the end portion of the wooden body 15 so as to press the intermediate position of the
In some cases, the bell is biased in a direction such as bell 11.

[0005]

In a hitting mechanism using a conventional cam mechanism, the sound pressure is adjusted by adjusting the strength of an elastic body and the position of a hitting ball and a bell. There is a drawback that only a certain volume of sound is emitted and the sound is not interesting.

[0006]

According to the present invention, there is provided a first cam body connected to a motor capable of rotating forward and reverse, and a projection is provided on the first cam body. A second cam body having an engagement piece with which the tip is in contact is provided, and the second cam body is provided with two contact portions arranged close to the link bar, and one of the contact portions is turned by rotation of the second cam body. A striking mechanism that contacts the link bar and swings the link bar.

Further, the second cam body is T-shaped, the engaging piece is arranged perpendicularly to a line connecting the contact portions, and the rotation center of the first cam body is arranged on the extension of the engaging piece. There is. Furthermore,
In the T-shaped second cam body, the distance from the center of rotation of the second cam body to the contact portion in the direction of the swing center of the link bar is larger than the distance from the center of rotation to the other contact portion. Sometimes.

In some cases, the contact portions of the second cam body may be arranged linearly, and the engagement pieces may be provided in the direction in which the line connecting the contact portions extends.

[0009]

According to the present invention, since the first cam body is connected to the forward / reverse rotatable motor, the first cam body can be rotated in both the forward and reverse directions. Since the second cam body having the engaging pieces that are in contact with each other is provided, the second cam body can be rotated left and right in accordance with the rotation direction of the first cam body.

Since the second cam body has two contact portions disposed close to the link bar, one of the contact portions is brought into contact with the link bar in accordance with the rotation direction of the second cam body to link. The swing angle of the link bar can be determined by the difference between the distance from the swing center of the link bar to one contact portion of the second cam body and the distance from the swing center to the other contact portion. A difference can be provided.

Further, if the second cam body is T-shaped and the center of rotation of the first cam body is arranged on the extension of the engagement piece of the first cam body, regardless of the rotation direction of the first cam body, The amount of rotation of the second cam body can be made equal to the left and right. Further, the second cam body in which the length of the contact portion is lengthened in the direction of the swing center of the link bar can greatly change the swing amount of the link bar while keeping the amount of rotation of the cam body equal to the left and right.

The shape of the second cam body provided with the engagement piece in the extension direction of the contact portion can be simplified.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment of the hitting mechanism 10 according to the present invention, as shown in FIG. 1, a stopper 16 is provided so that a hitting ball 13 is arranged near a bell 11, and a link bar 17 is attached to a hitting body 15. A swing shaft 19 is provided so as to fixedly swing the bar body 15 and the link bar 17 together, and the hit ball 13 is urged in the direction of the bell 11 by an appropriate elastic body.

As a cam mechanism for swinging the link bar 17, a second cam body 41 rotated by rotation of a first cam body 31 rotated by a motor is used.
The second cam body 41 has a substantially semicircular main body portion 45 provided with cutouts so as to form two contact portions 49, and a rotating shaft 43 positioned at the center of the circular shape of the main body portion 45 is provided. The two contact portions 49 are arranged as the centers close to the link bar 17 and the second cam body 41 is provided rotatably. The second cam body 41 is further provided from the center of the rotation shaft 43. The engaging piece 47 is formed in a direction perpendicular to a line connecting the contact portions 49.

The engagement piece when the second cam body 41 is stationary.
A rotation shaft 33 is provided in the extension direction of 47, and a first cam body 31 having the rotation shaft 33 as a center of rotation is provided.
The bar-like projection 35 that brings the engagement piece 47 and the tip into contact with each other
The first cam body 31 is rotated about a rotation shaft 33 by a motor capable of rotating forward and reverse. When the first cam body 31 is rotated, the rotation speed of the first cam body 31 is adjusted via an appropriate reduction gear train as in the related art.

As described above, in this embodiment, since the first cam body 31 is rotated by the motor capable of rotating forward and backward, the rotation direction of the first cam body 31 can be rotated in both forward and reverse directions. Since the tip of the protruding portion 35 of the first cam body 31 and the tip of the engagement piece 47 of the second cam body 41 are brought into contact with each other, the second
The engaging piece 47 of the cam body 41 and, consequently, the second cam body 41
Can be rotated left and right around the center.

The second cam body 41 is provided with two contact portions 49 in the vicinity of the link bar 17, so that the second cam body 41 is provided.
One of the contact portions 49 is brought into contact with the link bar 17 by the rotation of the link bar 17, and against the urging force of an elastic body (not shown),
17 is depressed, and as shown in FIGS.
Can be swung about the swing shaft 19.

At this time, one of the contact portions 49 is close to the swinging shaft 19 of the collision body 15 and the link bar 17 and the other end is far from the swinging shaft 19, and as shown in FIG. One cam body
31 is rotated to the left, and the swing shaft 19 of the second cam body 41 is rotated.
Press the link bar 17 with the contact portion 49 far from
As shown in FIG. 3, when the cam body 41 is rotated rightward and the engagement piece 47 comes out of contact with the protrusion 35,
When the cam body 41 rotates to the left and presses the link bar 17 with the contact part 49 close to the swing shaft 19, the contact between the engaging piece 47 and the protruding part 35 is released. Even if the left and right rotation angles are the same, the swing angle of the link bar 17 is larger when the second cam body 41 is turned to the left, and can be largely separated from the ball 13 and the bell 11. .

When the projection 35 of the first cam body 31 and the engagement piece 47 of the second cam body 41 are disengaged, the link bar 17 is returned to its original position by the elastic body, and the ball 13 By bell 11
Can be hit, and the ball is hit according to the rotation direction of the second cam body 41.
Since the amount of movement of 13 is different, when the first cam body 31 is rotated to the left, the bell 11 can be hit strongly, and when the first cam body 31 is rotated to the right, the bell 11 can be weakly hit. By changing the sound pressure, the timbre and the loudness of the sound can be changed according to the rotation direction of the motor.

FIG. 4 shows another embodiment of the present invention.
As shown in (2), the second cam body 41 is T-shaped so that the axis of the engagement piece 47 is orthogonal to the line connecting the two contact portions 49,
A rod-shaped main body 45 having contact portions 49 formed at both ends is arranged close to the link bar 17, and the main body 45 extends from the rotation shaft 43 in the direction of the swing shaft 19 of the link bar 17. In some cases, the distance from the rotating shaft 43 to one contact portion 49 is made longer than the distance from the rotating shaft 43 to the other contact portion 49 by increasing the length.

In the second embodiment, the distance between the contact portion 49 of the second cam body 41 and the contact portion 49 in the direction of the swing shaft 19 of the link bar 17 is increased. 2 cam body
Even if the rotation amount of the right and left is equal, the swing amount of the link bar 17 is further increased when the second cam body 41 rotates leftward, and the rotation of the first cam body 31 and the second cam body 41 is increased. A greater difference in sound pressure when reversing the direction can be provided.

In order to increase the difference in sound pressure, the contact portion
Not only when there is a difference between the left and right lengths of the 49
Remove the rotating shaft 33 from the extension of the engagement piece 47, and
When a difference is made between the right rotation amount and the left rotation amount of the second cam body 41 when the contact with the engagement piece 47 is released,
The second cam body when the rotation direction of the first cam body 31 is reversed by inclining the axis of the engagement piece 47 with respect to the contact portion 49
There may be a difference in the rotation angle of 41.

However, as shown in FIG. 4, the second cam body
The shape in which the engagement piece 47 of the 41 is perpendicular to the contact portion 49 can make the design, manufacture and assembly of the second cam body 41 and the striking mechanism 10 relatively simple, and particularly, When provided on the extension of the engagement piece 47, there is an advantage that the sound pressure difference can be easily set by the distance from the position of the rotating shaft 43 to the left and right contact portions 49.

Further, the first cam body 31 is not limited to the case where the bar-shaped protrusion 35 is provided, but may be a semi-circular protrusion 36 as shown in FIG. There is also a case where a notch is provided in the rim to make a large part of the circumference a protruding part 36.
In the third embodiment of the present invention, as shown in FIG. 6, a rod-shaped second cam body 41 is used.

In the third embodiment, one end of the second cam body main part 45 is projected from the tip of the link bar 17 as an engagement piece 47, and one end of the second cam body main part 45 and the tip of the link bar 17 are protruded. The link bar is used as the contact part 49 on the side of the main body part 45
17 is brought close. Also in the third embodiment, by changing the length from the rotation shaft 43 to the rear end of the main body portion 45 and the length from the rotation shaft 43 to the front end of the link bar 17, the first cam body By changing the position of the rotation shaft 33 of the 31, the swing angle of the link bar 17, that is, the strength of hitting the bell 11 or bell with the hit ball 13 can be changed according to the rotation direction of the first cam body 31. .

It should be noted that the link bar 17 is not only fixed integrally with the wooden body 15, but also as in the conventional example shown in FIG.
The swingable link bar 17 may be connected to the swingable splicer 15 or the elastically deformable splint 15 via a connection part, and the sounding body is also limited to the case where the bell 11 is used. Instead, a barbell or the like may be used as appropriate.

[0027]

According to the present invention, a striking bell having a first cam body connected to a forward / reverse rotatable motor and having a second cam body provided with an engagement piece in contact with a projection of the first cam body. Since the mechanism is a mechanism, the rotation direction of the second cam body is changed according to the rotation direction of the motor. Since the second cam body has two contact portions close to the link bar, the link bar is moved by one of the contact portions. The swinging angle of the link bar can be changed depending on the rotation direction of the second cam body, and the strength of hitting a hit ball to a bell or a stick can be changed. By simply switching the rotation direction of the motor, the intensity of the sound can be easily changed.

A striking mechanism in which the second cam body has a T-shape and the center of rotation of the first cam body is disposed on the extension of the engagement piece, the link bar having the same amount of rotation of the second cam body in the left and right directions. Can be changed, and the setting of the amount of change in sound pressure can be facilitated. Furthermore, the striking mechanism using the second cam body having the length of the contact portion with the length is easily set to easily increase the difference in sound pressure when the rotation direction of the motor is switched. .

The striking mechanism using the second cam body having the engaging piece in the flat direction can simplify the shape of the second cam body and facilitate the assembly and manufacture of the striking mechanism. is there.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of a striking mechanism according to the present invention.

FIG. 2 is a diagram showing an operating state of the striking mechanism according to the present invention.

FIG. 3 is a diagram showing an operation state of the striking mechanism according to the present invention.

FIG. 4 is a diagram showing a second embodiment of the hammer mechanism according to the present invention.

FIG. 5 is a view showing a modified example of the second embodiment of the striking mechanism according to the present invention.

FIG. 6 is a view showing a third embodiment of a hammer mechanism according to the present invention.

FIG. 7 is a diagram showing an operation state of a third embodiment of the hammer mechanism according to the present invention.

FIG. 8 is a diagram showing an operation state of a third embodiment of the hammer mechanism according to the present invention.

FIG. 9 is a view showing an example of a conventional striking mechanism.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 striking mechanism 11 bell 13 hitting ball 15 hitting body 16 stopper 17 link bar 19 oscillating shaft 21 cam body 23 cutout portion 31 first cam body 33 rotation shaft 35, 36 projecting portion 41 second cam body 43 rotation shaft 45 Body 47 Engagement piece 49 Contact

Claims (4)

(57) [Claims] A first cam body connected to a forward / reverse rotatable motor and having a protruding portion, and a second cam rotatable having an engagement piece that is in contact with the protruding portion of the first cam body and a tip thereof. And the second cam body has two contact portions disposed close to the link bar, and one of the contact portions abuts on the link bar by the rotation of the second cam body, thereby causing the link bar to move. A striking mechanism that swings the ball to move the ball and hit the ball or the like. 2. The T-shape of the second cam body, the engaging piece is arranged vertically with respect to a line connecting both contact portions, and the rotation center of the first cam body is arranged on the extension of the engaging piece. The striking mechanism according to claim 1, wherein: 3. A T-shaped second cam body, comprising:
3. The striking mechanism according to claim 2, wherein the distance from the center of rotation of the cam body to the contact portion in the direction of the swing center of the link bar is larger than the distance from the center of rotation to the other contact portion. . 4. The striking device according to claim 1, wherein the two contact portions of the second cam body are linearly arranged, and further, an engagement piece is provided in an extension direction of a line connecting the contact portions. Bell mechanism.