JPH019995Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a bell-striking device used in alarm clocks, etc., and is characterized in that a plurality of different bell-sounding sounds can be continuously varied in stages.

Conventionally, in a bell striking device that strikes a bell with a sounding body, the collision force between the sounding body and the striking ball is varied by variably adjusting the distance between the sounding body and the striking ball in order to vary the sound quality of the striking sound. There is a device. Although this type of bell-striking device can selectively emit a bell-sounding sound using a preset bell-striking force, the striking sound does not change continuously in stages during the operation of the bell-striking device. Further, the user has to adjust the positional relationship between the sounding body of the bell striking device and the striking ball in order to vary the striking sound, which is troublesome.

An object of the present invention is to provide a bell-striking device in which the sound quality and intensity of the bell-striking sound can be varied step by step and continuously while the bell-striking device is in operation.

In order to achieve this objective, the present invention has developed a motor whose rotational speed changes under the control of a timing signal output from a clock circuit, and a motor that rotates in synchronization with the motor to generate a striking bell height corresponding to the centrifugal force generated. It is composed of a bell-striking member held so that the position of the bell-striking member is displaced, and a plurality of sounding bodies that produce different striking sounds, which are arranged within a displaceable area of the bell-striking member, and the sounding body is configured to rotate as the motor rotates. It is characterized in that the sound of the bell is continuously varied in stages by selectively striking the bell in accordance with the number of bells.

The present invention will be described below based on an embodiment of the present invention shown in the drawings.

An embodiment of the present invention is shown in FIGS. 1 to 3, in which a motor 4 is fixed to a substrate 2 with a motor shaft 6 extending downwardly in the figure from a hole 2a of the substrate 2. A holding member 8 having a U-shaped cross section is attached to the motor shaft 6.
is connected to the motor shaft 6 so that it can rotate integrally with the motor shaft 6.
A swing shaft 10 is attached to the holding parts 8a and 8b of the holding member 8.
is swingably supported, and a striking rod 12 constituting a bell striking member is extended and formed on the circumferential surface of the swing shaft 10 at a position offset from the center of rotation of the motor shaft 6. Batting stick 1
As shown in FIG. 2, a hitting ball 14 having an elongated hole 14a is engaged with the ball 2. The long hole 14a
The lower part of the is the sounding body 16, 18, 20 shown in FIG.
This is a hole through which the ball 14 itself moves in the directions of arrows B and C when it collides with the hole, and this hole may be circular. The sounding bodies 16 to 20 are each made of a different material, and are arranged and held within the swinging region of the striking rod 12 by a support member 22, which is supported by a column 26 of a base 24. The surfaces of the sounding bodies 16 to 20 that collide with the hitting ball 14 are formed into a spherical inner surface with the holding portion of the hitting rod 12 as the center.

FIG. 3 is a block diagram showing a drive circuit for the motor 4. As shown in FIG. An output line 31 of the clock circuit 30 is connected to a pulse generation circuit 32, and outputs an output signal to the pulse generation circuit 32 at a time set by the user. An output line 33 of the pulse generation circuit 32 is connected to a motor rotation speed control circuit 34. An output line 35 from the clock circuit 30 is further connected to the motor rotation speed control circuit 34 . The motor rotation speed control circuit 34 receives output signals from both the pulse generation circuit 32 and the clock circuit 30, and outputs drive signals of three types of motor rotation speeds to the motor 4, which will be described later.

The motor rotation speed control circuit 34 and the motor 4 are connected through output lines 36, 38, and 40. When a motor drive signal is applied to the motor 4 via the output line 36, the motor 4 rotates at a low speed, and when applied via the output line 38, the motor 4 rotates at a medium speed. Furthermore, output line 4
The motor 4 is set to rotate at high speed when a drive signal is applied to the motor 4 via the motor 4. More specifically, when the output signal from the clock circuit 30 is applied to the motor rotation speed control circuit 34 via the pulse generation circuit 32 at the time set by the user, the motor drive signal is transmitted through the output line 36. Thus, the motor 4 starts rotating at a low speed. Then, the clock signal from the clock circuit 30 is applied and counted to the motor rotation speed control circuit 34 via the output line 35, and when a predetermined period of time has elapsed, the motor drive signal of the motor rotation speed control circuit 34 is applied to the motor rotation speed control circuit 34 via the output line 35.
The motor 4 starts rotating at a medium speed. After a further predetermined period of time has elapsed, the motor drive signal of the motor rotation speed control circuit 34 is output to the output line 4.
0 to the motor 4, and the motor 4 can rotate at high speed.

The embodiment of the present invention has the above configuration, and the operation of the present invention will now be explained based on FIGS. 1 and 4.

When the bell striking device is not operating, the striking stick 12 hangs down and remains stationary as shown by the solid line in FIG. When the set time comes and the motor 4 starts rotating at a low speed by the drive circuit shown in FIG. Displaced to. However, when the motor 4 rotates at a low speed, the striking rod 12 is allowed to be displaced within the displacement range of the angle α shown in FIG. 4, so the striking ball 14 can strike only the sounding body 16. The strength of the striking sound at this time sounds small because the striking force of the striking ball 14 is small.

After a predetermined period of time has elapsed, when the motor 4 is switched to medium speed rotation by the drive circuit shown in FIG. Can be displaced. The displacement range of the striking rod 12 is allowed within the range of angle β shown in FIG. Therefore, the hitting ball 14 can strike only the sounding body 18, and the sound quality and intensity of the striking sound can be varied.

Further, after a predetermined period of time has elapsed, when the motor 4 is switched to high speed rotation by the drive circuit shown in FIG.
The centrifugal force exerted on the rod is further increased, and the striking rod 12 is further displaced so that its displacement range is within the range of angle γ shown in FIG. Therefore, the striking ball 14 can strike only the sounding body 20, and the sound quality and intensity of the striking sound can be further varied.

According to the illustrated embodiment, when the time set by the user arrives, the ball 14 strikes only the sounding body 16 with a small striking force, but every time a predetermined time elapses. The position of the hitting ball 14 is displaced by the increased centrifugal force, and the hitting strength is increased.
The hitting ball 14 is allowed to hit only the sounding bodies 16, 18, and 20 successively in order as the centrifugal force increases. Therefore, the sound of the bell being struck is the sounding body 16.
20 are made of different materials, the sound quality and intensity can be varied continuously and stepwise at predetermined time intervals.

Although the collision surfaces of the illustrated sounding bodies 16 to 20 with the hitting balls 14 are smooth, a plurality of protrusions may be provided to protrude therefrom. Further, the sounding bodies 16 to 20 are made of a plurality of bells made of different materials, and the tips of the bells are connected to the sounding bodies 16 to 20.
It may be arranged so as to correspond to the spherical surface of. Further, in the embodiment, the striking rod 12 may be a string or an elastic member.

As explained in detail above, according to the present invention, the motor rotational speed is varied in multiple stages at predetermined intervals after the start of generation of the striking sound, so that the centrifugal force exerted on the hitting ball is continuous, and Since the displacement is varied stepwise, the ball is switched to a plurality of displacement ranges at predetermined time intervals. Therefore, the striking ball can be struck by continuously and stepwise switching a plurality of sounding bodies arranged within the movable region of the striking stick, and the sound quality and intensity of the striking bell can be changed continuously and stepwise. is made variable.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of an embodiment of the present invention, Fig. 2 is a cross-sectional view of the combined state of the batting rod and the ball, Fig. 3 is a block diagram of the motor drive circuit, and Fig. 4 is an explanatory diagram of the operation of the present invention. . 4... Motor, 8... Holding member, 10... Swing shaft, 12... Hitting stick, 14... Hitting ball, 16, 18,
20...pronunciation body.

Claims (1)

[Scope of utility model registration request] A motor whose rotation speed is controlled by a clock signal output from a clock circuit, and a striker which is held so that its height position changes in response to the centrifugal force generated by rotating in synchronization with the motor. It is composed of a bell member and a plurality of sounding bodies that produce different striking sounds arranged within a displaceable region of the bell striking member, and the sounding body is selectively struck in accordance with the rotational speed of the motor. A bell striking device characterized in that the sound of a bell striking is continuously varied in stages.