JPS6137031Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a music box or toy driven by a mainspring and a necessary gear mechanism, which automatically turns on an electronic circuit integrated therewith in accordance with the start and stop of the mechanical operation. Relates to automatic electrical contacts designed to turn off.

Conventionally, there are many music boxes and toys on the market that use springs and gear mechanisms, but in recent years electronic circuits have developed and costs have become lower. There is also active research into making toys that are even more interesting by emitting lights and sounds. However, in this case,
Toys are required to be easier to use, so instead of installing the power switch for the electronic circuit separately from the spring winding handle, the winding handle is wound and the gear mechanism operates automatically. It is necessary for the switch to be connected to the gear and automatically disconnected at the same time as the gearing stops, but such an automatic electrical contact has not yet been developed. The present invention was devised to solve the above-mentioned unexplored technical problem.The worm shaft that meshes with the worm gear is loosely supported on a bearing to reduce friction, and the rotation of the worm gear, Focusing on the fact that the worm moves slightly in the axial direction when it stops, the tip of the worm shaft is used as a moving contact, and a fixed contact is set in a position close to the tip of the worm shaft to create an automatic electrical contact that achieves the above purpose. be.

A case in which the embodiment of the present invention is applied to a music box will be explained in detail with reference to the drawings. 1 is a mainspring wound around the mainspring shaft, and 3 is a drum driven by the mainspring shaft 2 via a bevel gear 4. , 5 is a diaphragm that is played by a protrusion installed in the drum 3. Reference numeral 6 denotes a vane-type governor provided to equalize the rotational speed of the drum 3, and the governor 6 has a worm 7 formed in its lower half, and has upper and lower ends 8a and 8b pointed in a conical shape. It is integrally fixed to the upper part of the worm shaft 8 and is driven by the mainspring shaft 2 via a worm gear 9 that meshes with the worm 7 and a required gear mechanism 10. Reference numeral 11 denotes a support made of a material with good electrical conductivity, which has a U-shape when viewed from the side, and has a bearing hole 13 at the tip of the lower horizontal piece 12, and a bearing hole 13 in the upper horizontal piece 14. A through hole is opened at a position facing the hole 13, and a ring-shaped bearing 15 is fitted into the inner wall surface of the through hole.
The upper and lower ends 8a and 8b of the worm shaft are respectively inserted into the worm shafts, and the worm shaft 8 is loosely supported so that it can move up and down slightly, and when the worm shaft 8 rises, its tip 8a protrudes upward from the bearing 15. Configure it as follows. 16 is a fixed contact, and the worm shaft 8
Fix it in a position where it will touch if it rises.
Reference numeral 17 indicates an insulator interposed between the fixed contact and the support 11. 18 is a light emitting diode, 19 is a lighting circuit for the light emitting diode, and 2
0 is a battery, with a conductor 21 connected to the battery 20,
The fixed contact 16 and the lighting circuit 19 are connected in series.

The music box configured as above has mainspring 1.
When the drum 3 is tightened, the bevel gear 4 is driven and the drum 3 is tightened.
The diaphragm 5 is rotated, and the diaphragm 5 is successively played with the projections to play a melody, and the gear mechanism 10, the worm gear 9, and the worm 7 are driven to rotate the vane type governor 6. When the worm gear 9 starts rotating in the direction of the arrow A, the worm shaft 8 is pulled upward by the worm shaft 9, and the tip 8a touches the bearing 15.
The light emitting diode 1
Turn on 8. When the mainspring 1 relaxes and the worm gear 9 is about to stop, the worm gear 9 applies a force that applies a brake to the rotation of the worm 7, pulls down the worm shaft 8, and separates the tip 8a and the fixed contact 16, causing light to emit. Turn off the diode 18. In this case, the vertical movement of the worm shaft 8 is caused by the worm 7.
This is caused by the mechanical action of the shape of the worm gear 9, and is completely unrelated to the weight of the worm shaft 8. Therefore, as shown in FIG. Even when a bridge is installed, the switch action can be performed in the same way. Although the above embodiment is applied to a music box, the present invention can be applied to any toy that has a configuration in which a gear mechanism is driven by a mainspring. Furthermore, the above is an example in which a light emitting diode lighting circuit is used as the electronic circuit.
Of course, any other electronic circuit can be used.

Since the automatic electrical contact of the present invention is configured with the tip of the worm shaft as a moving contact, it is possible to properly connect or disconnect the electronic circuit according to the start and stop of the mechanical operation of the music box or toy, and the structure is simple. It has the characteristics that it can be manufactured at low cost and is difficult to break down.

[Brief explanation of the drawing]

The attached drawings are examples of the automatic electrical contact according to the present invention, in which Fig. 1 is a plan view when applied to a music box, Fig. 2 is a front view of the same, and Fig. 3 is a front view showing the configuration of the electrical contact part. 4 are front views of electrical contacts showing other embodiments. 1...Spring, 2...Spring shaft, 3...Drum, 4...Bevel gear, 5...Diaphragm, 6...Governor, 7...Worm, 8...Worm shaft, 8
a... Upper end, 8b... Lower end, 9... Worm gear, 10... Gear mechanism, 11... Support, 12
... Lower horizontal piece, 13 ... Bearing hole, 14 ... Upper horizontal piece, 15 ... Bearing, 16 ... Fixed contact, 17
... Insulator, 18 ... Light emitting diode, 19 ...
Lighting circuit, 20...battery, 21...conductor.

Claims (1)

[Scope of utility model registration request] A worm shaft that meshes with the worm gear is supported on a support made of a material with good conductivity so that one tip of the worm shaft protrudes or is buried outside the support as the worm gear rotates or stops. An automatic electrical contact provided in a music box or toy having a spring and a gear mechanism driven by the spring, the fixed contact being set at a position where one end comes into contact with the protruding tip.