JPS5831103Y2 - Buffer structure of hitting mechanism - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement in the hitting structure, in which a shmoku holding piece is integrally formed on the shmoku, and a buffer cam that engages with the swing of the shmoku holding piece and the buffer cam are used to prevent the shmoku from being pressed. The present invention provides a shock absorbing structure for a striking mechanism, which is composed of a suppressing spring pressed in a direction to reduce impact, and uses the shock absorbing cam to absorb unnecessary repetitive vibrations when striking a bell.

In the conventional striking structure, each time a schmoku feed cam interlocked with a shimok drive mechanism makes one rotation, the shimoku bell striking piece is lifted against a return spring, and the bell or the like is struck by the elastic force of the return spring.

When striking a bell, the shmoku generates rocking vibrations due to the vibration of the shmoku striking piece itself and the return spring centered on the support shaft.

Therefore, the vibration of the shmoku bell piece caused the bell to be struck twice when it should have been struck once.

As a result, a problem arises in that the ringing sound becomes unclear and a noise is generated that is unpleasant to the user's ears.

The present invention solves the above problem, and its purpose is to eliminate the noise generated when the bell is struck.

In order to achieve the above object, the hammering mechanism of the present invention has a shmoku holding piece integrally formed with the shumoku, and a rotatable buffer cam that engages with the swing of the shmoku holding piece. The surface that engages with the shumoku presser piece is formed as a continuous surface consisting of a surface whose center of curvature is eccentric from the center of rotation, and a surface whose center of curvature coincides with the center of rotation. The buffer cam is configured to rotate in one direction, and the buffer cam is characterized in that a suppressing spring is configured to return the buffer cam to its original position after the rotation.

As a result, in the hitting mechanism of the present invention, by providing the shumoku holding piece and the buffer cam, the swinging movement of the shmoku in the striking direction can be absorbed by sliding with the buffer cam engagement surface. When Shumoku returns in the opposite direction from the striking position, unnecessary vibrations of Shumoku itself are absorbed and the Shumoku returns quickly after striking the bell by receiving elastic force assistance from the pressing spring of the buffer cam. This makes it possible to solve problems such as double hitting.

That is, when the Shumoku swings in the direction of striking the bell, the Shumoku holding piece slides to forcibly rotate the buffer cam against the pressing spring, so it acts to absorb the vibrations of the Shumoku itself. After the Shumoku strikes the bell, the Shumoku holding piece receives elastic force assistance in the direction of return due to the return rotation by the pressure spring of the buffer cam, which allows the Shumoku to return quickly after striking the bell. This can solve problems such as double hitting.

Since the present invention has the above-mentioned structure, when the Shumoku striking bell piece strikes a bell, etc., unnecessary vibrations of the entire Shumoku are not generated, thereby providing a clear intermittent striking sound. This eliminates mechanical noise, which was a problem in the past.

Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings.

Figure 1 is a plan view of the main parts of the batting structure in this proposal,
FIGS. 2 and 3 are explanatory diagrams of the batting motion.

The shmoku 1 is integrally formed with a shmoku feeding piece 2 having rigidity, a shmoku pressing piece 3, and a shmoku striking piece 4 having elasticity.

The shimoku 1 is slidably supported by a support I on the base plate via a return spring 5.

One end of the return spring 50 is engaged with the shmoku holding piece 3, and the other end is engaged with a pin 6 protruding from the base plate.
is biased in the X direction.

Although not shown, the feed cam 8 is fixed to a shaft that transmits rotation from a drive mechanism of the striking structure, and is disposed so as to be able to engage with the shmoku feed piece 2.

The buffer cam 9 has a curved surface 9a, is pivotally supported by a column 10 so that the curved surface 9a and the shamoku presser piece 3 slide, and is biased in the Y direction by a pressure spring 11.

The pressing spring 11 has one end secured to the buffer cam 9 and the other end secured to a pin 12 protruding from the base plate.

The shape of the curvature surface 9a is such that when the shank 1 is displaced in the X direction as shown in FIG. Due to the resilient force of the return spring 5, a force F acts on the circumference around the support 7, causing the buffer cam 9 to move to Y.
’ direction.

After that, the shimoku presser piece 3 and the curvature surface 9a slide, and the third
When the state of the illustrated opening is reached, that is, the position where the curvature surface 9a whose center of curvature coincides with the center of rotation and the Shumoku presser piece 3 is in contact, the contact point P slides to the contact point P', and the force F' is directed to the center of the support shaft 10. It is set so that it can act in the opposite direction and lock the Shumoku presser piece.

A striking ball (not shown) is attached to the tip of the Shumoku bell striking piece 4, and is set to strike a bell or the like (not shown) arranged on the main plate.

Next, the operation of the present invention will be explained.

As shown in FIG. 2, each time the feed cam 8 rotates once in the direction of the arrow A in conjunction with the drive mechanism, the shmoku feed piece 2 is pressed by the feed cam 8 and resists the return spring 5 in the direction of the arrow X' force. and moves to position 1 shown by the broken line.

When the engagement between the feed cam 8 and the shmoku feed piece 2 is released,
The shmoku 1 is repelled in the X direction by the elastic force of the return spring 50.

Thereafter, the shmoku presser piece 3 engages the curved surface 9a of the buffer cam 9, resists the elastic force of the suppression spring 11, slides on the curved surface 9a in the direction of the support shaft, and absorbs the elastic force of the return spring 5. The pressure is gradually absorbed, and when it comes into contact with the shaft of the buffer cam 9, it is completely absorbed and the pressure spring 11 returns to its original position (the position shown in the first figure) by its elastic force. to be restored.

On the other hand, the shmoku striking piece 4 has a shmoku pressing piece 3 and a buffer cam 9.
Although it is not shown in the figure, when it comes into contact with the shaft of the ball, the ball attached to its tip strikes a bell or other object just once to signal the time.

Immediately after striking the bell, the shmoku 1 returns to the position shown in the first diagram, with the return spring 5 and the pressing spring 11 controlling the swinging vibration around the pillar I and the vibration caused by the elastic force of the shmoku bell striking piece 4 itself. It turns out.

As a result, the striking ball attached to the tip of the Shumoku striking piece 4 will strike the bell only once every time the feed cam 8 rotates once.
It is possible to eliminate the harsh mechanical noise that has been a problem in the past, and to clearly notify the user of the time.

As another embodiment, the buffer cam 9 and the pressing spring 11 may be integrally molded from a synthetic resin having elasticity, and in this case as well, the same effects as described above can be thermally provided.

In addition, because the number of parts can be reduced, assembly man-hours are reduced.
A buffer structure can be provided at low cost.

As described in detail above, the buffer structure of the present invention has a simple structure and can absorb the unnecessary vibration of the schmoke after the bell is struck, so it can always give a clear time signal and has extremely practical value. It is highly effective.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of the main parts of the hitting mechanism, and FIGS. 2 and 3 are explanatory diagrams of the operation of the hitting mechanism. 1...Shmoku, 2...Feed piece, 3.
...Shumoku presser piece, 4...Shumoku hammering piece, 5...Return spring, 9...Buffer cam, 9a...Curvature surface , 11... Pressing spring.

Claims (1)

[Scope of utility model registration request] In a time signal clock having a structure in which a bell or the like is struck by the swinging motion of the shumoku, a shmoku pressing piece is integrally formed on the shmoku, and a rotatable buffer cam is formed that engages by the swinging of the shmoku pressing piece. The contact surface of the buffer cam with the shumoku presser piece is formed as a continuous surface by a surface whose center of curvature is offset from the center of rotation and a surface whose center of curvature coincides with the center of rotation. The buffer cam is configured so that it rotates in one direction when the
A shock absorbing structure for a hitting mechanism, characterized in that the shock absorbing cam is provided with a suppressing spring for returning when the rotation is performed.