JPH09113650A - Spring type timer and discoloring toy using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the fear of continuous current to a load even with the termination of timer work before a set time by making a switch mechanism on-state with the aid of the centrifugal force due to the rotation of a power shaft caused by stored spring force. SOLUTION: By drawing a drawing string 531, a winding part 53 is rotated to the degree corresponding to a set time and a coil spring 51 is urged. By releasing it after urging, the stored force is transmitted to a power shaft 4 as rotation work by way of a transmission gear train (a driving gear 52 to intermediate small and large gears 61, 62 to a power small gear 42) and due to the centrifugal force by the rotation work of the power shaft 4, a movable switch part 21 distorts outward. The tip end provided with a cone 23 begins to slide on the inner surface of a fixed switch part 22 and a switch mechanism 2 becomes the on-state and starts to send current to the load 8. Therefore, the mechanism 2 is on-state only when the rotary shaft 4 is rotating and it becomes the off-state when the rotation stops. Thus, even if the timer operation stops before the set time because of failure and the like, the fear of continuously sending current to the load 8 can be avoided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mainspring timer for controlling a relatively short energization time of a load.
The present invention also relates to a color-changing toy to which the mainspring timer is applied.

[0002]

2. Description of the Related Art Conventionally, a mainspring type timer for controlling an energization time has been widely used in, for example, electric ovens and electric washing machines. However, the conventional mainspring type timer is generally a mechanism for turning off a cam switch by a cam of a timed shaft after a set time has elapsed, and should the mainspring mechanism malfunction (for example, a transmission mechanism such as a gear failure). Alternatively, if the rotation due to the power storage force of the mainspring is stopped halfway due to an incorrect operation (such as the act of fixing the winding portion), the timer switch will not turn off and the load may continue to be energized. is there. In particular, if the load is a type of heater that does not have a self-temperature control function, it is necessary to consider overheating prevention, and in general, a device such as a sensor switch that shuts off the circuit at high temperatures is required, and the structure is complicated Tend to be next door.

In the field of toys, a combination of a centrifugal force switch and a toy form is known. For example, a toy form such as a yo-yo or a spinning top is provided with a switch that is actuated by centrifugal force, and the switch turns the energized state to actuate the sounding device (Japanese Utility Model Laid-Open No. 59-53097, Japanese Unexamined Utility Model Publication). 1-1384
No. 91, etc.) or a toy lamp configured to apply a centrifugal force switch that operates via an actuator frictionally engaged by a centrifugal force according to the rotation of wheels to a traveling toy to light a lamp during traveling. Flashing device (Actual Kokaku Sho 39-893)
No. 4) and the like. However, the above-mentioned conventional one is not independent as a timer, but is one that utilizes the rotational operation of a toy in combination with a toy form,
The scope of application of toys is limited. In particular, the conventional centrifugal force switch has been difficult to apply to an energization actuating device that does not have a rotary operation.

[0004]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems of the prior art. Even if an accident occurs in which the timer operation is stopped before the set time, the load is not energized. It is an object of the present invention to provide a mainspring timer having a simple structure, which is not likely to be sustained and has a wide range of applicable fields, and various forms are possible particularly in the field of toys. Another object of the present invention is to provide a color-changing toy using the mainspring timer.

[0005]

[Means for Solving the Problems] Outline A first aspect of the present invention is a mainspring type timer 1 for controlling an energization time to a load 8, in which an output shaft 4 rotating by a stored force of a mainspring is provided. It is a requirement that the switch mechanism 2 that is turned on by the centrifugal force accompanying the rotation of is provided.

A second aspect of the present invention is the mainspring timer 1 described above.
A color-changing toy that uses a heater, wherein the load 8 is a heater 81.
And a thermochromic layer 8 that discolors due to the heat generated by the heater 81
It is required to have 2 and. Switch mechanism

Further, the switch mechanism 2 includes a conductive output shaft 4, a movable contact portion 21 provided on the output shaft 4, and a fixed contact portion 22 with which the movable contact portion 21 is slidable by centrifugal force. It is preferable that a series circuit of the power source 7 and the load 8 is connected between the output shaft 4 and the fixed contact portion 22. The switch mechanism 2 is in the ON state when the output shaft 4 is rotating properly, and is in the OFF state when the rotation of the output shaft 4 is stopped.

The switch mechanism 2 is of a type in which the output shaft 4 is immovable in the axial direction (see FIGS. 1, 2, 3, and 4).
5) and a type in which the output shaft 4 is movable in the axial direction (FIGS. 6 and 7).

Specifically, as the switch mechanism 2 of the type in which the output shaft 4 is immovable in the axial direction, for example, a conductive output shaft 4 and a weight body 23 attached to the output shaft 4 and attached to an end portion thereof. And a movable contact portion 21 formed of a curved leaf spring,
The movable contact portion 21 is composed of a fixed contact portion 22 having a circumferential inner side portion capable of sliding contact (FIGS. 1, 2, and 3), a conductive output shaft 4, and the output shaft 4. And a movable contact portion 21 which is a pantograph-like actuator which is attached to the end portion and has a weight 23 at its end and which can be freely bent and extended.
1 is a fixed contact portion 2 having a circumferential inner portion capable of sliding contact
2 (FIG. 4), or a movable contact portion 21 composed of a conductive output shaft 4 and a tension coil spring attached to the output shaft 4 and having a weight body 23 at an end thereof.
And a fixed contact portion 22 having a circumferential inner side portion capable of sliding contact with the movable contact portion 21 (FIG. 5) and the like.

The output shaft 4 is of a movable type in the axial direction, for example, a movable contact portion 21 composed of a conductive output shaft 4 which is movable in the axial direction by an actuator which receives a centrifugal force and operates, The movable contact portion 21 is composed of a fixed contact portion 22 that can come into contact (FIG. 6), or an output shaft 4 that is axially movable by the operation of an actuator similar to the above, and a fixed contact when the output shaft 4 is pressed. Movable contact portion 2 that contacts the portion 22
1 and the like (FIG. 7) and the like.

Load The load 8 may be any energization actuating element that operates to generate heat, rotate, emit light, or generate sound when energized. The load 8 can be exemplified by a heater 81 (a resistance heating element having no self-temperature control function), a motor, a light emitting body (for example, a light bulb), a sounding body (for example, a buzzer), and the like in combination with the heater 81. A combination with the thermochromic layer 82 can be exemplified.

(Heater) As the heater 81,
Examples thereof include linear bodies and thin film bodies made of a metal such as nickel-chromium alloy, titanium, tungsten, copper, aluminum, iron, stainless steel, or conductive plastic.
Further, the thin film, for example, a coating of conductive ink,
Examples include a metal vapor deposition film, a metal foil, and the like, and usually an appropriate pattern according to the thermochromic layer (for example, zigzag shape,
It is arranged so as to draw a curved pattern such as a spiral.

In particular, the heater 81 is preferably a metal thin film. In that case, the metal has a volume resistivity of 1.4 × 10 ⁻⁶ Ω · cm to 2.5 × 10 ⁻⁵ Ω · cm.
Those in the range of are effective, specifically, copper, copper alloys, aluminum, nickel, zinc, tin, titanium,
Examples of good conductive metal materials such as gold and silver. Among them, a system to which a thin film made of copper having a relatively low cost and a low resistance value is applied is most effective.

More specifically, as shown in FIG. 9, the heater 81 made of a thin film of metal has a copper foil layer (thickness, formed on the surface of a base material 83 such as a plastic film).
2 μm to 50 μm, preferably 3 μm to 15 μm), and a system in which a desired heating circuit pattern is arranged by etching is preferable. The heater 81 can be easily formed by the heating circuit pattern,
Satisfies practicality in terms of conductivity, endurance, heat generation, etc. The heat generation amount per unit area of the heater 81 is 1
0 × 10 ⁻³ W / cm ^{2 to 3} W / cm ² , preferably 5
^{0 × 10 -3 W / cm 2} ~2W / cm 2, more preferably ^{200 × 10 -3 W / cm 2} ~1W / cm 2, by setting the heating value of the preferred range, promptly desired The temperature rises to the exothermic temperature and the danger due to overheating is reduced. The calorific value per unit area is 10 × 10 ⁻³ W /
If it is smaller than cm ² , heat is not generated in a short time when a low voltage is applied. On the other hand, the calorific value per unit area is
If it is larger than 3 W / cm ² , there is a danger of instantaneous heat generation to a high temperature.

(Thermochromic layer) Further, the thermochromic layer 82, which discolors due to the heat generated by the heater 81, may be provided directly on the surface of the heater 81 (see FIG. 8) or indirectly via another thermally conductive member. Alternatively, any structure may be used as long as the color can be changed by the heat generated by the heater 81, such as a structure arranged near the heater 81.

In particular, when the heater 81 is a heating circuit pattern formed by etching a copper foil layer, the load is concealed with a dispersion ink of a non-thermochromic pigment on the upper surface of the heating circuit pattern. A non-thermochromic base layer 84 is formed which obstructs the visibility of the circuit, and then a non-thermochromic layer 85 is formed on the upper surface of the non-thermochromic base layer 84 by a non-thermochromic ink, and finally, It is preferable that the non-thermochromic layer 85 is provided on the upper surface thereof with the thermochromic layer 82 that prevents the non-thermochromic layer 85 from being visible at room temperature (see FIG. 9).

Color-changing toy Thermo-color-changing layer 8 which changes color by heat generated by the heater 81
Examples of the form of the color-changing toy provided with 2 include a doll without a moving part, an animal figure toy such as a stuffed animal, or a running toy, an animal toy, a floating toy, a device toy having a moving part. It is also possible to connect the operation part of the color-changing toy to the output shaft 4 of the mainspring mechanism 3 and operate the toy by using a mainspring drive.

[0018]

[Action]

(Operation of Claim 1) The output shaft 4 is rotated by the power storage force (rewinding force) of the mainspring. The switch mechanism 2 is turned on by the centrifugal force generated by the rotation of the output shaft 4.
Further, the switch mechanism 2 is turned off when the rotation of the output shaft 4 is stopped. As a result, the mainspring timer 1 of the present invention is safe because the power supply to the load 8 is not likely to be continued even if an accident occurs in which the mainspring operation stops halfway while retaining its energy storing force. Is improved. Moreover, it has a simple structure, and is particularly suitable as a timer for an inexpensive toy. Also, because it is independent as a timer, it can be applied to various fields,
In particular, when applied to toys, the flexibility of toy form is expanded.

(Operation of Claim 2) The output shaft 4 is electrically conductive and has a function as a conductive member. Further, a separate member ( For example, the movable contact portion 21 directly receives the rotation of the output shaft 4 and slides in contact with the fixed contact portion 22 without interposing a frictional engagement element or the like as in the conventional art. Thus, a timer having a simple structure in which the number of parts of the switch mechanism 2 is minimized can be provided at a lower cost.

(Operation of Claim 3) The load 8 is the heater 8
1 and the thermochromic layer 82 that discolors due to the heat generated by the heater 81, the spring timer 1 according to claim 1 or 2 is used even if an accident occurs in which the rotation of the mainspring is stopped midway. By using the heater 8
Since there is no possibility that the energization of 1 will continue, the heater 8
It is possible to provide a color-changing toy in which the overheating of No. 1 is prevented and the thermochromic layer 82 is not damaged, and the safety is further improved.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

Embodiment 1 FIG. 1 is a perspective view of a first embodiment of a mainspring timer of the present invention, FIG. 2 is a vertical sectional view of FIG. 1, and FIG. 3 is a sectional view taken along line AA of FIG.

The mainspring type timer 1 has a mainspring mechanism 3
And a switch mechanism 2 operated by the mainspring mechanism 3.

(Spring mechanism) In the hollow box body 11,
The spiral spring 51 and a transmission gear group that transmits the driving force from the spiral spring 51 to the output shaft 4 as an increased rotational force are housed. A drive shaft 5, an intermediate shaft 6, and an output shaft 4 are attached to the box body 11. A winding portion 53 is attached to the drive shaft 5 so as to be exposed to the outside of the box body 11, and a spiral spring 51 for driving a mainspring and a drive gear 52 are attached to the inside of the box body 11. Further, an intermediate large gear 62 and an intermediate small gear 61 that meshes with the drive gear 52 are attached to the intermediate shaft 6. Furthermore, an output pinion gear 42 that meshes with the intermediate large gear 62 is attached to the output shaft 4. In the present embodiment, the winding portion 53 is configured by a winding reel provided with a pulling string 531 having a knob 532 at the end, but in addition to this, a winding knob directly rotated with a finger or a dial having a scale may be used. Good.

(Switch Mechanism) The switch mechanism 2 is
A conductive (for example, metal) output shaft 4, a movable contact portion 21 that is attached to the output shaft 4 and includes a curved conductive (for example, metal) leaf spring that includes a weight body 23 inside the end portion.
The movable contact portion 21 is composed of a fixed contact portion 22 made of a conductive (for example, metal) cylindrical body having an inner peripheral surface capable of sliding. A weight body 23 for efficiently generating a centrifugal force is disposed inside one end of the movable contact portion 21, and the other end thereof is connected to the output shaft 4 via a metal mounting body 25. It In addition, the fixed contact portion 22 is the movable contact portion 21.
Is arranged on the outer periphery of the casing so that its axis coincides with the output shaft 4, and is fixed to a box body 11 made of a non-conductor (or an insulator). Further, a fixed contactor 41, which is a metal piece that is in constant contact with the output shaft 4, is disposed in the box body 11. One end of a series circuit of a power supply 7 and a load 8 is connected to the fixed contactor 41, while the fixed contact portion 22 is connected to the power supply 7
And the other end of the series circuit of the load 8 is connected.

Next, the operation of the mainspring timer 1 of this embodiment will be described in order. The pulling string is pulled, the winding portion 53 is rotated by an amount corresponding to the set time, the spiral spring 51 is charged, and then the charging force is released. The stored force is applied to the transmission gear group (driving gear 52 → intermediate small gear 6
1 → Intermediate large gear 62 → Output small gear 42) is transmitted to the output shaft 4 as a rotary operation. The movable contact portion 21 is deformed outward by the centrifugal force generated by the rotation operation of the output shaft 4 (see FIG. 3), and the tip provided with the weight body 23 starts sliding with the inner peripheral surface of the fixed contact portion 22. . At this time, the switch mechanism 2 is turned on for the first time, and the energization of the load 8 is started. The ON state continues until the spring power is completely released. Then, after the spring power is completely released, the rotation operation of the output shaft 4 is stopped, and the movable contact portion 21 is deformed inward by the restoring force (spring force), and the fixed contact portion 22 is formed. Contact is cut off. Then, the switch mechanism 2 is turned off and the energization of the load 8 is terminated.

The mainspring timer 1 has a load 8 depending on the time from the start to the end of the discharge of the mainspring energy storage force (that is, the time during which the output shaft 4 rotates at a set speed or more). The energization time is controlled. The energization time is adjusted by the winding amount of the winding portion 53. In practice, when the heater 81 is used as the load 8, it is preferable to set it to 1 second to 60 seconds (preferably 2 seconds to 30 seconds).

Further, the mainspring type timer 1 is provided only when the timer function is normally operating (that is, only when the output shaft 4 is rotating at the set number of revolutions or more).
In the ON state (closed state) and when the rotation of the output shaft 4 is stopped due to an accident other than that, for example, before the set time,
It has a fail-safe structure in which the load 8 is always kept in the OFF state (open state) and the energization of the load 8 is not maintained. Further, the mainspring timer 1 requires time to re-operate the winding portion 53 of the mainspring mechanism 3 in order to energize the load 8 again, so that continuous energization of the load 8 becomes substantially impossible. As a result, in a system to which the heater 81 is applied, overheat prevention is more effectively performed.

In addition to the switch mechanism 2 provided on the output shaft 4, the load 8 is provided by providing an operating mechanism.
In addition to the above-mentioned operation, it is possible to add various operations by the rotation of the output shaft 4, and in the case of a toy form, variations in interest increase. Further, the operating mechanism can be provided not only on the output shaft 4 but also on the drive shaft 5 and the intermediate shaft 6.

Second Embodiment FIG. 4 shows a longitudinal sectional view and a circuit diagram of a main portion of a second embodiment of the mainspring timer according to the present invention. This is a modification of the switch mechanism 2 of the first embodiment.

The switch mechanism 2 is mainly composed of a conductive (for example, metal) output shaft 4 and a conductive (for example, metal) pantograph-like actuator that is bendable and stretchable and is attached to the output shaft 4. And the movable contact portion 21
Is a fixed contact portion 22 made of a conductive (for example, metal) cylindrical body having a circumferential inner surface capable of sliding contact. A conductive (for example, metal) weight 23 is fixed to the outside of the end of the pantograph-shaped actuator. Further, an elastic body 24 (for example, a coil spring or the like) is housed inside the movable contact portion 21 (actuator), and the elastic body 24 outwardly moves both axial end portions of the movable contact portion 21. I am biased.

The movable contact portion 21 is provided with weight bodies 23 for efficiently generating a centrifugal force at both radial end portions thereof, and the output shaft 4 is connected to both axial end portions thereof. It The movable contact portion 21 is attached to the output shaft 4 so as to be able to transmit a rotational force, and at the same time, is attached so as to be slidable in the axial direction. During rotation of the output shaft 4, the pantograph-shaped movable contact portion 21 extends outward in the radial direction, and the weight body 23 is brought into sliding contact with the inner peripheral surface of the fixed contact portion 22.
A series circuit of the power source 7 and the load 8 is connected between the fixed contact 41 and the fixed contact 41 which are always in contact with the output shaft 4. Switch mechanism 2 of this embodiment (FIG. 4)
Is connected to the spring mechanism 3 similar to that of the first embodiment (FIG. 2), and the same effect as the first embodiment can be obtained.

Embodiment 3 FIG. 5 shows a vertical sectional view and a circuit diagram of a main portion of a third embodiment of the mainspring timer of the present invention. This is a modification of the switch mechanism 2 of the first embodiment.

The switch mechanism 2 is mainly a conductive (for example, metal) output coil 4 and a conductive (for example, metal) tension coil spring which is attached to the output shaft 4 and has a weight 23 at an end thereof. And a fixed contact portion 22 made of a conductive (for example, metal) cylindrical body having a circumferential inner surface on which the movable contact portion 21 is slidably contactable. One end of the coil spring is connected to the output shaft 4 through a conductive (for example, metal) mounting body 25, and the other end thereof is a conductive (for example, metal) spherical weight body 23.
Is fixed. A series circuit of a power supply 7 and a load is connected between the fixed contact 41 and the fixed contact portion 22 which are always in contact with the output shaft 4. The switch mechanism 2 of the present embodiment (FIG. 5) is connected to the mainspring mechanism 3 similar to that of the first embodiment (FIG. 2), and the same effect as the first embodiment can be obtained.

Fourth Embodiment FIG. 6 shows a longitudinal sectional view and a circuit diagram of a main portion of a fourth embodiment of the mainspring timer of the present invention. This is a modification of the switch mechanism 2 of the first embodiment.

The switch mechanism 2 is of a type in which the output shaft 4 is movable in the axial direction, and is mainly a pantograph-like actuator 26 which is actuated by a centrifugal force and a conductive member which is movable in the axial direction by the actuator 26. Contact part 2 consisting of a flexible output shaft 4
1 and a fixed contact portion 22 with which the movable contact portion 21 can contact. The output shaft 4 (that is, the movable contact portion 21) having the actuator 26 is the box body 11 of the mainspring mechanism 3.
Rotatably attached to.

Weights 23 are arranged at both ends in the radial direction of the actuator 26 so as to efficiently generate a centrifugal force.
Further, the actuator 26 is provided with an output shaft 4 at one end in the axial direction.
Are fixed, and the output shaft 4 is loosely inserted into the other end portion in the axial direction.
Inside the actuator 26, an elastic body 241 made of a coil spring is arranged, and the elastic body 241 is connected to the actuator 26.
Both axial ends of are urged outward. Furthermore, the elastic body 242 made up of another coil spring pushes the operating element 26 against the inner wall of the box body 11 on the fixed contact 22 side so that the operating element 26 and the inner wall of the box body 11 on the fixed contact 41 side are pressed. Placed in between. In addition, the fixed contact portion 22,
A series circuit of a power source 7 and a load 8 is connected between the fixed contactor 41 which is always in contact with the output shaft 4.

When the output shaft 4 is rotating, the actuator 26
Expands in the radial direction, and the output shaft 4 (movable contact portion 21) contacts the fixed contact portion 22. At this time, the energization is turned on. On the other hand, when the rotation of the output shaft 4 is stopped, the actuator 26
Is expanded in the axial direction by the elastic body 241, the output shaft 4 (movable contact portion 21) is separated from the fixed contact portion 22, and the energization is turned off.
State. The switch mechanism 2 of the present embodiment (FIG. 6) is connected to the spring mechanism 3 similar to that of the first embodiment (FIG. 2), and the same operational effect as that of the first embodiment can be obtained.

Embodiment 5 FIG. 7 shows a longitudinal sectional view and a circuit diagram of a main portion of a fifth embodiment of the mainspring timer of the present invention. This is a modification of the switch mechanism 2 of the first and fourth embodiments.

The switch mechanism 2 mainly includes an output shaft 4 which is axially movable by the operation of a pantograph-like actuator 26 similar to that shown in FIG. 6, and a movable contact portion 21 which is pressed by the output shaft 4 and is elastically deformable. The movable contact portion 21 is in contact with the fixed contact portion 22.

The output shaft 4 functions as a push rod for pressing the movable contact portion 21, and unlike the first to fourth embodiments,
Not energized. Therefore, as in the first to fourth embodiments,
The sliding contact portion (that is, the sliding contact between the movable contact portion 21 and the fixed contact portion 22 or the sliding contact between the output shaft 4 and the fixed contact 41) is unnecessary. The switch mechanism 2 of this embodiment (FIG. 7) is connected to the mainspring mechanism 3 similar to that of the first embodiment, and the same effect as the first embodiment (FIG. 2) can be obtained.

(Application Example) FIGS. 10 to 13 show an embodiment of a color-changing toy 9 using the spiral spring timer 1 of the present invention.

Inside the hollow main body 91, the mainspring type timer 1 shown in the first to fifth embodiments and the power source 7 (battery) connected to the mainspring type timer 1 are housed. The pull string 531 attached to the winding reel of the drive shaft 5 of the mainspring timer 1 is exposed to the outside from the mouth portion 93 of the face, and a knob 532 made up of a small doll is attached to the tip thereof.

Further, the main body 91 has an appearance that imitates the face of an animal, and the eye portion 92 thereof has a heater 81 connected to the mainspring timer 1 and the power source 7, and discolors due to heat generated by the heater 81. A thermochromic layer 82 is provided. More specifically, as shown in FIG. 9, the heater 81 has a heating circuit pattern formed by etching a processed film base material 83 in which a 0.3 μm thick copper vapor-deposited thin film is formed on a polyethylene terephthalate film. is there. A printing layer (non-thermochromic base layer 84) made of a non-thermochromic white pigment ink is formed on the upper surface of the heating circuit pattern (heater 81), thereby hiding the circuit. Thereafter, a non-thermochromic red ink (non-thermochromic layer 85) is drawn on the upper surface of the printed layer to form a blood vessel pattern that expresses bloodshot eyes. Further, on the upper surface of the non-thermochromic layer 85, a reversible thermochromic ink (specifically, 3
A thermochromic layer 82 is formed by concealing printing by being colorless at 0 ° C. or higher and exhibiting black at 30 ° C.).

Next, the operation of the color-changing toy of this embodiment will be described (see FIGS. 12 and 13). When the pull string 531 is pulled to release the spring power (FIG. 12), the switch mechanism 2 of the spring timer 1 is turned on,
Energization of the heater 81 is started. Then, the pull string 531 is wound up, and the knob 532 is formed of a small doll.
When is locked by the mouth portion 93 (FIG. 13), the switch mechanism 2 is turned off, and the power supply to the heater 81 is terminated. The thermochromic layer 82 of the eye portion 92 discolors due to heat generated by energizing the heater 81. That is, the pupil of the eye portion 92 is black before energization (FIG. 12), but after energization, the black thermochromic layer 82 becomes colorless due to the heat generation of the heater 81, and the non-thermochromic layer 85 below it is hyperemic. Eyes appear (Fig. 13).

In this embodiment, the operating time of the timer when the maximum amount of the pulling string 531 is pulled out, that is,
The energization time to the heater 81 was set to 3 to 7 seconds. The energization time prevents the heater 81 from overheating, and at the same time provides a sufficient amount of heat to discolor the thermochromic layer 82.

[0047]

According to the spring timer of the present invention, due to the structure of claim 1, even if an accident occurs that the operation of the timer is stopped before the set time, there is no possibility that the load is continuously energized. Therefore, safety is improved. Moreover, it has a simple structure, and is particularly suitable as a timer for an inexpensive toy. Further, since it is independent as a timer, it can be applied to various fields, and in particular, it can be applied to various toy forms in the toy field.

According to the structure of claim 2, it is possible to provide a timer having a simple structure in which the number of parts of the switch mechanism is minimized.

In the case of the structure of claim 3 (that is, the structure in which the load is composed of the heater and the thermochromic layer which discolors due to the heat generated by the heater), an accident occurs in which the rotation operation of the mainspring is stopped midway. Also, by using the mainspring type timer according to claim 1 or 2, since there is no possibility that the heater is energized, overheating of the heater is prevented and there is no risk of damaging the thermochromic layer.
It is possible to provide a discolored toy with further improved safety.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a first embodiment of the present invention.

FIG. 3 is a sectional view taken along the line AA in FIG. 2;

FIG. 4 is a longitudinal sectional view of a main part showing a second embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a main part showing a third embodiment of the present invention.

FIG. 6 is a longitudinal sectional view of a main part showing a fourth embodiment of the present invention.

FIG. 7 is a longitudinal sectional view of a main part showing a fifth embodiment of the present invention.

FIG. 8 is a cross-sectional view showing an example of a load.

9 is a cross-sectional view showing another example of the load shown in FIG.

FIG. 10 is a vertical cross-sectional view showing an embodiment of the color-changing toy of the present invention.

11 is a circuit diagram of the color-changing toy of FIG.

12 is a perspective view showing a state of the color-changing toy of FIG. 10 before being energized.

13 is a perspective view showing a state of the color-changing toy of FIG. 10 after being energized.

[Explanation of symbols]

1 Spring timer 11 Box body 2 Switch mechanism 21 Moving contact part 22 Fixed contact part 23 Weight body 24 Resilient body 241 Resilient body 242 Resilient body 25 Mounting body 26 Actuator 3 Spring mechanism 4 Output shaft 41 Fixed contactor 42 Output pinion 5 Drive shaft 51 Spiral spring 52 Drive gear 53 Winding part 531 Pulling string 532 Knob 6 Intermediate shaft 61 Intermediate small gear 62 Intermediate large gear 7 Power supply 8 Load 81 Heater (heating circuit pattern) 82 Thermochromic layer 83 Base material 84 Non-thermochromic base layer (non-thermochromic white pigment ink) 85 Non-thermochromic layer (non-thermochromic ink) 9 Color-changing toy 91 Body 92 Eyes 93 Mouth

Claims (3)

[Claims] 1. A power-spring type timer for controlling an energization time to a load (8), comprising: an output shaft (4) which is rotated by a stored force of the mainspring; and a centrifugal force generated by the rotation of the output shaft (4). A mainspring timer, which is provided with a switch mechanism (2) that is turned on by the switch. 2. A switch mechanism (2) includes a conductive output shaft (4) and a movable contact portion (21) provided on the output shaft (4).
And a fixed contact portion (22) capable of sliding contact with the movable contact portion (21) by centrifugal force. A power source (7) is provided between the output shaft (4) and the fixed contact portion (22). The mainspring timer according to claim 1, wherein a series circuit of a load and a load (8) is connected. 3. A load (8), a heater (81), and a thermochromic layer (8) that discolors due to heat generated by the heater (81).
(2) A color-changing toy using the spring timer according to claim 1 or 2.