JPH0518831Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a spring-type timer that uses a spring as a driving source.

(Prior Art) A conventional example of a spring-type timer using a spring as a driving source is shown in FIG. 3. In FIG. 3, a stopper pin 43 that restricts the rotation range of the main shaft 48 by coming into contact with a regulating pin (not shown) is press-fitted into the main shaft 48, and a first wheel 51 is fixed thereto. The main shaft 48 is biased in one direction by a friction plate 49. A gear 52 is fitted into the first wheel 51 so as to be relatively rotatable. A spring washer 50 is also fitted to the first wheel 51, and the biasing force of the friction plate 49 causes the first wheel 51 and the washer 50 to move together.
By being brought into pressure contact with each other, the rotational force of the first wheel 51 is transmitted to the gear 52 by frictional force. Stopper pin 43, main shaft 48, friction plate 49,
The washer 50, the first wheel 51, and the gear 52 constitute a main shaft assembly, and this main shaft assembly is rotatably supported by the upper base plate 41 and the base plate 66. One end of the mainspring 42 is hooked to any of the parts constituting the main shaft assembly, for example, the first wheel 51, outside the frame made up of the upper base plate 41 and the lower base plate 66, and the mainspring 42 is attached to the first wheel 51. It is wound around the number wheel 51, and the other end of the mainspring 42 is hung on a suitable hook portion of the upper base plate 41.

Between the upper base plate 41 and the base plate 66, there is a speed increasing gear train 5.
3, 54, 55, 56, 57, 58, 59, 6
0 and 61 are arranged, and the gear 53 of the first stage of this speed increasing gear train meshes with the gear 52. A goose wheel 62 is integrally provided with the gear 61 at the final stage of the speed increasing gear train, and a pendulum plate 64 is provided on this goose wheel 62.
A pendulum 63 having an integral part is engaged with the pendulum 63. This pendulum 63 is rotated back and forth by the rotation of the goose wheel 62 in one direction to control the rotational speed of the speed increasing gear train and main shaft assembly at a constant level, and has the same structure as the speed governor mechanism of a mechanical watch. It's getting old.

As is well known, the spindle assembly is provided with a timer cam (not shown), and the rotation of this cam operates a switch to perform a timer operation.

Practically the same technology as the above conventional example was put into practice in 1983.
It is described in Publication No. 31045.

(Problems to be Solved by the Invention) According to the above-mentioned conventional spring-loaded timer, the spring is hooked to the main shaft assembly. That is, the mainspring is placed at the position of the wheel train that requires the most force to move the speed-governing mechanism in terms of the ratio of the speed-increasing wheel train and the wheel train efficiency. Therefore, especially for timers that can be set for long periods of time, it was necessary to increase the torque of the mainspring, and the strength of the main shaft assembly, the first gear of the gear train that meshed with it, and the mainspring barrel had to be made stronger. However, there is a limit to increasing the torque of the mainspring due to the strength limits of each part, and since it is not possible to provide a margin for the rotational torque of the gangi, there is a problem that it is easy to stop. It is necessary to increase the size of the mainspring, which increases the space it occupies, making it difficult to downsize, especially in the case of long-time timers.

The present invention was developed to solve these conventional problems, and makes it possible to reduce the mainspring torque while ensuring the torque necessary for reversing the main shaft assembly and operating the speed regulating mechanism. hand,
In addition to reducing the space occupied by the mainspring, we also reduced the strength required for each part to make it more compact.
Another object of the present invention is to provide a spring type timer that solves the problem of the timer stopping midway by increasing the conversion efficiency from the spring torque to the rotational torque of each part.

(Means for solving the problem) The present invention includes a cam that can rotate integrally with the main shaft,
A switch that is controlled on and off by this cam, a main gear that is rotated in the time setting direction together with the main shaft, a speed increasing gear train that meshes with this main gear and is rotationally driven, and The present invention is characterized by comprising a speed regulating mechanism that engages with a rotating body to perform speed regulating operation, and a mainspring serving as a drive source connected to one of the gears in the speed increasing gear train.

(Operation) When the main shaft is rotated and a time limit is set, a mainspring installed in the middle of the speed increasing gear train is energized, and the biasing force of this mainspring operates the speed governor mechanism via the speed increasing gear train, and the main shaft remains constant. reversed at speed. When this cam reverses to its original position, a switch is activated to perform a timed operation. The power stored in the mainspring is distributed between the gear train and the main shaft assembly.

(Example) In FIGS. 1 and 2, reference numeral 11 indicates a middle plate;
12 is a base plate, 13 is an upper base plate, and 14 is a horizontal base plate, and the case is formed by the middle plate 11, the base plate 12, the upper base plate 13, and the horizontal base plate 14. A first wheel 20, a pinion 21, a second gear 22, and these pinions 21 are connected by the middle plate 11 and the base plate 12.
and a second wheel assembly consisting of a shaft 23 common to the gear 22,
A third wheel 24, a fourth wheel 25, and a fifth wheel 26 are held. Further, a flying goose wheel 27 and a pendulum 28 are held by the upper base plate 13 and the middle plate 11. The pendulum 28 integrally has a pendulum plate 29. moreover,
A main shaft 15 and a lever 32 (see FIG. 2) are held by the middle plate 11 and the horizontal base plate 14. Main shaft 15
is held horizontally, while the first wheel 2
The axes of the gear train after 0 are held vertically.

A stopper pin 33 that restricts the rotation range of the main shaft 15 by hitting a regulating pin (not shown) on the outside of the horizontal base plate 14 is press-fitted into the main shaft 15. A main gear 18 is rotatably fitted within the space. A horizontal base plate 1 is provided on the side of the main gear 18.
4, a cam 31 for time limit setting is rotatably fitted. A friction washer 19 is further fitted onto the main shaft 15, and a spring washer 17 is fitted at a stepped portion between the main gear 18 and the cam 31. The washer 17 is rotationally integrated with the main shaft 15 by fitting its D-shaped hole into the D-shaped cross section of the main shaft 15. Spring washer 17 biases gear 18 to the right in FIG. 1 against washer 19. Washiya 1
7, the main gear 18, and the washer 19 constitute a friction clutch mechanism that transmits rotational force through friction torque. A protrusion 17a is provided on the periphery of the washer 17.
is formed, and the gear 18 also has the protrusion 17a.
A protrusion 18a is formed on the rotation path. When the main shaft 15 is rotated by external operation, the output gear 18
The friction clutch mechanism receives the load from the wheel train after the first wheel 20, so the friction clutch mechanism slips and only the main shaft 15 side rotates. However, when both of the protrusions 17a and 18a come into contact with each other due to the rotation of the main shaft 15, the main gear 18 is pushed by the protrusions 17a and 18a and tries to rotate together with the main shaft 15. Another pin 16 is press-fitted into the main shaft 15. Pin 16 is cam 3
1 and transmits the rotational force of the main shaft 15 to the cam 31. These main shaft 15, pin 16, washer 1
7, a gear 18, and a washer 19 constitute a main shaft assembly.

One end of a mainspring 30 as a driving source is hooked to the boss portion of the first wheel 20 and is wound around the mainspring 30, and the other end of the mainspring 30 is pulled to the side surface of the barrel portion of the base plate 12. It is hung. A square hole is formed in the shaft of the first wheel 20, and by inserting a tool into the square hole from outside the barrel and rotating the first wheel 20 with this tool, the mainspring 20 is attached to the first wheel 20. It can be wrapped around. A small diameter bevel gear is formed on the first wheel 20, and this bevel gear meshes with a large diameter bevel gear formed on the main gear 18.

A shaft 23 is press-fitted into the gear 22, and the pinion 21 can rotate around the shaft 23. The pinion 21 meshes with a large diameter gear of the first wheel 20. The pinion 21 is provided with a ratchet pawl, and the gear 22 is provided with ratchet teeth that are pressed against the ratchet pawl. These ratchet pawls and ratchet teeth constitute a one-way rotation mechanism, and the mainspring 3
When the pinion 21 rotates using 0 as the driving source,
This rotational force is transmitted to the gear 22.

A second wheel assembly including a pinion 21 and a gear 22, a third wheel 24, a fourth wheel 25, a fifth wheel 26, and a flywheel 27 constitute a speed-increasing gear train, and a pendulum 28 having a pendulum plate 29 It constitutes a speed regulating mechanism that engages with the goose wheel 27 as a rotating body in the speed increasing gear train to perform speed regulating operation. 1st wheel 2 due to the stored power of mainspring 30
The rotational force of 0 is transmitted to the speed increasing wheel train. on the other hand,
The rotational force of the first wheel 20 due to the stored force of the mainspring 30 is transmitted to the main gear 18 after changing its direction by 90 degrees through the engagement of the bevel gear, and then to the main shaft 15 via the friction clutch mechanism, and then via the pin 16. and is transmitted to the cam 31. As is well-known, the pendulum 28 is a gangi-guruma 27.
It rotates reciprocatingly at a constant speed by receiving a rotational force in one direction from Regulate the speed to a constant speed.

In FIG. 2, the lever 32 is rotatably arranged around its support shaft in the same plane as the rotation plane of the cam 31. As shown in FIG. An operating piece of a switch (not shown) is in pressure contact with the outer side of the lever 32, and the pressure contact force causes the protrusion of the lever 32 to engage the cam 3.
It is pressed against the cam surface on the outer periphery of 1.

Although the main shaft assembly and the pendulum 28 are shown separated in FIG. The second
As shown in the figure, when the protrusion of the lever 32 falls into the recess of the cam 31, the switch (not shown) is off, and the tip of the lever 32 enters the rotation range of the pendulum plate 29, causing the pendulum plate to rotate back and forth. It is designed to prevent movement.

Next, the operation of the above embodiment will be explained.

When the main shaft 15 is rotated clockwise, which is the time setting direction in FIG. 2, from the switch-off state shown in FIG. The main gear 18 also rotates together with the main shaft 15 in contact with the protrusion 18a. When the main gear 18 rotates, the first wheel 20 meshing with it also rotates, and the mainspring 30
is stored. As the first wheel 20 rotates, the pinion 21 also rotates, but due to the one-way clutch mechanism between it and the second gear 22, only the pinion 21 rotates and the second gear 22 does not rotate. On the other hand, when the main shaft 15 is rotated, the cam 31 is rotated by its pin 16, and the lever 32, which is in pressure contact with the cam surface of the cam 31, is pushed by the cam slope, and the chain line 32A in FIG.
The switch is rotated counterclockwise as shown, and the operating piece of the switch (not shown) is pressed to turn on the switch. Further, the tip of the lever 32 escapes from the rotation range of the pendulum plate 29, and the pendulum 28
make it operational. When the main shaft 15 is further rotated, the stopper pin 33 eventually comes into contact with a protrusion of the case (not shown), making it impossible to wind up the winding, and the maximum time limit setting state is reached.

After that, when the main shaft 15 is rotated counterclockwise in FIG. 2 to set a desired time period, a friction clutch mechanism comprising a washer 17, a main gear 18, and a washer 19 is used to engage the gear train after the main gear 18. does not rotate, and only the cam 31 and the main shaft assembly rotate and return.

After setting the time limit, the torque of the mainspring 20 is transmitted from the first wheel 20 to the Gangi wheel 27 via the speed increasing gear train.
The goose car 27 is driven to rotate at high speed. Gangi car 27
constitutes a speed regulating mechanism together with the pendulum 28, and the pendulum 28 reciprocates at a constant speed due to the rotation of the flywheel 27, causing the wheel train from the first wheel 20 to the flywheel 27 to rotate at a constant speed. On the other hand, the main shaft 15 rotates while being decelerated by the engagement between the first wheel 20 and the main gear 18, and the cam 31 is also reversed by the pin 16. When the predetermined set time has elapsed, the cam 31 returns to its original position, and the protrusion of the lever 32 moves toward the cam 3.
1 and the lever 32 rotates clockwise in FIG. 2 to turn off a switch (not shown). At the same time, the tip of the lever 32 enters the rotation range of the pendulum plate 29 to prevent the pendulum plate 29 from rotating, thereby stopping the operation of the timer.

When the main shaft 15 is rotated counterclockwise from the original position shown in FIG.
The pendulum 28 and the pendulum plate 29 become free and begin to operate by being pushed by the slope on the opposite side and rotated counterclockwise as shown by the chain line 32A to turn on the switch. However, the stopper pin 33 of the main shaft 15 hits the protrusion of the case, and the main shaft 15
rotation is prevented. Thereafter, the gear train after the main gear 18 operates while the switch remains on. However, the protrusion 18a of the main gear 18 eventually comes into contact with the protrusion 17a of the washer 17 and the operation is stopped, and the switch (not shown) continues to be in the on state. That is, if the main shaft 15 is rotated counterclockwise from the state shown in FIG. 2, the continuous ON mode is established.

According to the above embodiment, the mainspring 30 is connected to the first wheel 20, which is one of the gears in the speed-increasing gear train, and the stored force of the mainspring 30 is distributed between the speed-increasing gear train side and the main shaft assembly side. Therefore, the position of the mainspring 30 is closer to the speed regulating mechanism consisting of the ganki wheel 27, etc.
The torque for driving the speed regulating mechanism is increased, and the problem of the timer stopping can be solved, and the mainspring can also be made smaller.

In addition, by arranging the main shaft 15 perpendicularly to the axis of the gear train from the No. 1 gear 20 to the pendulum 28, the speed regulating mechanism consisting of the pendulum 28, etc. can be operated in a horizontal state with respect to the mounting orientation of the timer. operation is stable.

Note that the mainspring may be wound around the second wheel or later. In order to make the main shaft and the axis of the subsequent gear train orthogonal, any suitable means other than bevel gears, such as spur gears, crown gears, etc., may be used. Also, 1
A friction clutch mechanism may be provided on the number wheel, the timer may be set using the first axle, and the time may be displayed using the main shaft.

(Effects of the invention) According to the invention, the mainspring is connected to a gear in the middle of the speed-increasing gear train, and the stored force of the mainspring is distributed between the speed-increasing gear train side and the main shaft assembly side. is closer to the governor mechanism than before, and the torque to drive the governor mechanism increases.
It is possible to solve the problem of the timer stopping, and it is also possible to downsize the mainspring.

[Brief explanation of the drawing]

Fig. 1 is an exploded cross-sectional view showing an embodiment of the wind-up timer according to the present invention, Fig. 2 is a partially sectional side view of the same embodiment as seen from the left side, and Fig. 3 is a cross-sectional view of the conventional wind-up timer. It is a sectional view showing an example. 15...Main shaft, 18...Main gear, 20, 21,
22, 24, 25, 26...speed-increasing gear train, 27...
Gangi wheel configuring the speed regulating mechanism, 28... pendulum composing the speed regulating mechanism, 30... mainspring, 31... cam.

Claims (1)

[Scope of utility model registration request] A timer setting cam is provided on the main shaft so as to be rotatable integrally with the main shaft, a switch is controlled on and off by the cam, and a switch is provided on the main shaft and is rotated together with the main shaft in the timer setting direction. a main gear; a speed-increasing gear train that meshes with the main gear and is rotationally driven; a speed-governing mechanism that engages with a rotating body in the speed-increasing gear train to perform a speed-regulating operation; and the speed-increasing wheel train. A spring-type timer that is equipped with a mainspring as a driving source connected to one gear in the middle.