JPS6029715Y2 - Mainspring durability test device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mainspring durability testing device, and more particularly to a mainspring durability testing device capable of testing the durability of a mainspring in a spring-driven traveling toy.

Traveling toys that use a so-called pull-back spring as a driving source use the unwinding force of the wound spring to run, and once wound, it takes a certain amount of time for the toy to unwind completely.

In order to conduct this durability test, a structure that takes into account the unlocking time and winds up the mainspring is required.

In order to perform such periodic operation, a structure may be considered in which the motor is turned on and off intermittently, but this may result in a complicated structure.

The object of the present invention is to provide an unprecedented mainspring durability testing device that is capable of winding and unwinding a so-called pullback type mainspring with an extremely simple structure.

The details of the present invention will be described above based on the embodiments shown in the drawings.

Figure 1 and the following diagrams show one embodiment of the present invention, and the mainspring durability testing device indicated by reference numeral 1 in the figure has a case 2 which has an approximately L-shape and is placed in a lower position of the case 2. A plurality of free arms 4 each having one end rotatably supported via a shaft 3 are arranged.

The free arm 4 is formed into an elongated plate shape, and has a notch or opening 6 in which four wheels 5a of the traveling toy 5 are rotatably fitted at its free end.

The number of these notches or openings 6 may be limited to a number in which only the drive wheel is rotatably fitted.

The traveling toy 5 has at least its drive wheel fitted into the opening 6 and is fixed to the free arm 4 by a presser lever 7 so as not to move.

The presser lever 7 is formed into a substantially L-shape, and its lower end is rotatably supported on the side edge of the free arm 4.
The traveling toy 5 can be fixed to the free arm 4 by using the elasticity of the synthetic leather resin or metal.

On the other hand, a continuous drum 8 made of rubber or the like is disposed below each free arm 4, and this drum 8 is always in contact with the drive wheels of the traveling toy 5.

A shaft 9 is horizontally suspended at the lower end of the free arm 4 in parallel with the drum 8.

A plurality of cams 10 are fixed to this shaft 9.

The mounting position of the shaft 9 is closer to the shaft bearing end of the free arm 4 than the drum 8 is.

The cam 10 attached to this shaft 9 corresponds one-to-one to the free arm 4, and as shown in FIG. It consists of a set of two cam pieces 10a and 10a, and each cam piece 10a and 10a is force-fitted to the shaft 9, and the phases are shifted from each other as shown in FIG. It is structured so that it can be changed to any state.

The drum 8 and shaft 9 are rotated at a predetermined speed by a motor (not shown) housed in the case 2 via a reduction gear mechanism.

Further, a digital counter 11 for setting the number of tests is provided in a part of the case 2, and a digital subtraction counter 12 is provided corresponding to each free arm 4.
The motor is configured to stop when the number is subtracted to J.

Next, a method of using the durability testing apparatus configured as above will be explained.

First, set the number of tests, for example '5001, on the counter 11, and open the opening 6 of each free arm.
Fit the wheels of the traveling toy 5 using the presser lever 7.
Secure the moving toy.

Then, when the motor is turned on, the drum 8 and shaft 9 begin to rotate.

When the drum 8 rotates, the wheels 5a of the traveling toy 5 that are in contact with the drum 8 rotate, and winding of the mainspring is started.

When the mainspring is wound in properly, the cam 10
rotates, and the cam surface on the long diameter side is the free arm 4.
In order to contact and push up the lower surface of the free arm 4, the free arm 4 is rotated about the shaft 3 in a direction in which its free end side rises.

As a result, the wheels 5a of the traveling toy 5 separate from the drum, and the mainspring is unlocked.

Eventually, when the cam 10 passes, the free arm 10 returns to its original state, and the wheels 5a of the traveling toy 5 are moved to the drum 8.
It begins to come into contact with the mainspring, and the mainspring is wound up.

After that, repeat the same operation until '0. When it is subtracted to , the motor stops and the waist test ends.

By the way, if the unwinding time and the unwinding time of the mainspring are long, this cannot be done because the time during which the free arm 4 is pushed up by the cam 10 is short when the cam pieces 10a, 10a are completely overlapped.

In such a case, as shown in FIG. 4, the cam piece 10a,
When 10a is shifted, the contact distance l becomes longer, so the free arm 4 is pushed up for a longer time, and the unraveling time can be longer.

As is clear from the above explanation, the present invention has a relatively simple structure consisting of a combination of a drum, a cam, and a free arm, and a durability test in which winding and unwinding of the mainspring can be performed continuously and reliably for a predetermined number of times. machine can be provided.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view, Fig. 2 is an exploded perspective view, Fig. 3 is a perspective view of the cam, and Fig. 4 is a perspective view with the cam piece shifted.
FIG. 5 is a perspective view showing the rotating state of the free arm. 1... Durability testing machine, 2... Case, 3
...Axis, 4...Free arm, 5...
... Traveling toy, 6 ... Free arm, 7.
...Presser lever, 9...Shaft, 10...
...Cam, 10a...Cam piece.

Claims (2)

[Scope of utility model registration request] (1) A free arm which is rotatably supported at one end and fixedly supports a traveling toy using a mainspring as a drive source on the upper side, and a free arm which is arranged under the free arm and rotates with the driving wheel of the traveling toy. A mainspring durability test characterized by comprising: a rotating drum that contacts and applies a power to wind up the mainspring; and a cam that appropriately pushes up the free arm while rotating to release rotational contact between the drive wheel and the rotating drum. Machine. (2) The cam is fixed to a drive shaft arranged parallel to the drum and is composed of a plurality of cam pieces having the same shape, and each cam piece is configured to be able to change the phase of each other. A mainspring durability testing device according to claim 1 of the utility model registration claim, characterized in that: