JPH0211115B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cuckoo body driving device for a cuckoo clock.

In the case of conventional cuckoo clocks, a cochlear-shaped counting cam,
The pigeon body moves forward and backward in conjunction with a rack-type counting mechanism consisting of a rack with a fan-shaped gear, a rack feed cam, and a striking lock. However, according to this method, the structure is complicated and assembly is troublesome, and furthermore, there are drawbacks such as the inability to increase the forward and backward movement stroke of the pigeon body.

The present invention provides a completely new pigeon body drive device that does not rely on a rack-type counting mechanism, and aims to eliminate the above-mentioned drawbacks of the conventional pigeon body driving device.

To explain an example, in FIG.
A window frame 2 is attached to a hole in a timepiece frame body 1, and a pair of doors 3, 3 are supported on the front surface of the window frame 2 so as to be openable and closable. A guide rail 4 integrally extends rearward from the rear lower part of the window frame 2.
A slider 5 is slidably fitted in the. Projections 6, 6 integrally protruding from the upper front surface of the slider 5
One end of the door links 7, 7 is rotatably engaged with the door links 7, 7, and the other ends are rotatably connected to the back surfaces of the doors 3, 3. An arm 8 is integrally formed to extend rearward from the back side of one (left side) of the doors 3, 3, and one end of a connecting lever 9 is rotatably attached to the end of this arm 8 as shown in the second figure. is connected to. One end of the connecting lever 9 is formed in a bifurcated portion 9a, and a hole portion 9b formed in the bifurcated portion 9a.
A hemispherical protrusion 8a protruding from both sides of the end of the arm 8 is rotatably fitted therein. The connecting lever 9 has a shaft portion 10 on a part thereof (in this example, the upper surface of the bifurcated portion 9a), and this shaft portion 10 penetrates inside from the abdomen of the pigeon body 11, and the pigeon body is attached to the end thereof. 11 is rotatably attached. When the pigeon body 11 rotates around the end of the shaft portion 10, its wing portions and beak portion open and close, which is substantially the same as in the prior art. One end of the link 13 is rotatably connected to the fixed member 12 (in the illustrated example, it is formed integrally with the frame 1), and the other end is rotatably connected to the other end of the connecting lever 9. has been done.

Next, the drive device for the pigeon body 11 will be explained. This device is formed into a unit and is attached to the back side of the frame body 1. A shaft of a swing lever 16 is rotatably supported by an upper case 14 and a lower case 15 of the drive device. The turning lever 16 extends diagonally to the left in FIG. 1, and is inserted into the openings 5a on both sides of the slider 5 (see FIG. 4). From the bottom surface of the swing lever 16, an L-shaped arm 1 can be seen as shown in the fifth and seventh figures.
7 is formed to hang down, and its end faces the cam surface of a pigeon body advance/retreat cam 19 formed on the lower surface of the gear 18. The pigeon body advancing/retracting cam 19 has peaks and valleys extending approximately 180 degrees each. In addition, as shown in FIG.
One end of the return spring 21 is hooked to the spring 0, and the other end is hooked to a protrusion 22 (FIG. 1) protruding from the bottom surface of the lower case 15. The return spring 21 applies a counterclockwise return force to the pivot lever 16 in FIG.
When the pivot lever 16 is in FIG. 1, the arm 17 is in the valley of the cam 19 (FIG. 7), and the pigeon body 11
is retracted diagonally to the rear of the frame 1. A pinion 24 meshes with the gear 18, and an output pinion 26 of the motor _M1 meshes with a gear 25 integrated therewith.

Further, a pigeon-shaped rocking cam 27 having a cylindrical body having valleys and peaks is integrally formed on the upper surface of the gear 18, and one end 28a of the intermediate lever 28 extends to the upper surface of the cam 27. There is. As shown in the fifth figure, the intermediate lever 28 is rotatably supported by a shaft 30 between legs 29, which hang down integrally from the inner surface of the upper case 14. One end of the swing lever 31 passes through a long groove 28a formed at the other end of the intermediate lever 28. The swing lever 31 is rotatably attached to a shaft portion 33 formed on one side of the protrusion 32 on the upper surface of the swing lever 16 .

Further, a lock arm 34 extending to the right of the shaft portion of the pivot lever 16 is integrally formed, and a fourth
As shown in the figure, an end of an arm 34 enters the lower surface of a rotating body 35, which is an example of a movable body rotatably supported between cases 14 and 15. A permanent magnet 36 is fixed to the upper surface of the rotating body 35 and is located between the magnetic poles of a U-shaped stator 37. A coil 38 is wound around the stator 37, and the case 1
It is held between pillars 39 which are integrally formed from pillars 4 and 15. This stator 37 is the same as the stator of a step motor for a watch.
The magnetic poles of the permanent magnet 36 are positioned relative to the stator 37 as shown in FIG. 1 when no current is applied, but when the coil 38 is energized, the permanent magnet 36 is rotated approximately 45 degrees clockwise. Also, a pin 40 is provided on the lower surface of the rotating body 35.
A lock pawl 41, which is an example of an engaging member, is formed to hang down. The pin 40 is inserted into a groove of a guide 42 protruding from the lower case 15 to regulate the rotation angle of the rotating body 35 (permanent magnet 36). The action of the lock pawl 41 will be made clear by the explanation of its operation below.

Furthermore, a switch cam 43 is provided on the upper surface of the gear 18 protruding from the outer periphery of the pigeon body rocking cam 27 so that it can engage with a switch 45 provided on the lower surface of the circuit board 44 as shown in FIG. 5 during rotation. It's getting old.
This switch cam 43 has a number of engagements between the peak of the pigeon body swing cam 27 and one end 28a of the intermediate lever 28;
In other words, it is for detecting the number of swings of the swing lever 31 and its timing.

Next, the operation will be explained. When the clock strikes the hour in the state shown in FIG. 1, the motor _M1 is started and the locking coil 38 is energized. By energizing the coil 38, the left and right legs of the stator 37 are magnetized to S and N poles, and the permanent magnet 36 applies clockwise attraction torque to the pin 4 on the lower surface of the rotating body 35.
0 and the lock pawl 41 are rotated to the position shown by the chain line in FIG. That is, the lock pawl 41 is connected to the lock arm 34.
enters into the rotation trajectory of. On the other hand, the pigeon body advancement/retraction cam 19 is rotated counterclockwise in _FIG . It pivots to the chain line position in FIG. 7 against the spring force of the spring 21 (FIG. 1). During this rotation, the tip of the lock arm 34 comes into contact with the lock pawl 41, but the lock arm 34 pushes the lock pawl 41 counterclockwise against the suction torque. The moment the tip of the lock arm 34 passes the lock pawl 41, the lock pawl 41 again enters the position indicated by the chain line in FIG. 7 due to the suction torque. Thereafter, the locking pawl 41 will maintain this position until the current to the coil 38 in FIG. 1 is cut off. Therefore, once the swing lever 16 swings to the position indicated by the chain line in FIG.
Even if the lock arm 34 is opposed to the trough 9, the lock arm 34 comes into contact with the lock pawl 41 and is prevented from returning to its original position.
It should be noted that when the arm 17 is at the peak of the pigeon body advancement/retraction cam 19, the lock arm 34 is slightly separated from the lock pawl 41.

By turning the turning lever 16, the slider 5 moves forward along the guide rail 4 as shown in the third figure.
As a result, the doors 3, 3 are pushed open via the door links 7, 7, the pigeon body 11 is pulled forward by the arm 8, and the pigeon body 11, which had been housed diagonally, is moved between the connecting lever 9 and the link 13. It flies out from doors 3 and 3, facing straight ahead. At this time, the tail end 1 of the pigeon body 11
A swing lever 31 is located opposite 1a (see FIG. 2). In FIG. 5, the rotation of the pigeon body rocking cam 27 causes the intermediate lever 28 to move once per rotation.
One end 28a thereof engages with the crest of the pigeon body swing cam 27 and repeats swinging around the shaft portion 30. As the intermediate lever 28 swings, the swing lever 31 on the swing lever 16 in FIG.
It swings, and its wings and beak also open and close. The pigeon body rocking cam 27 is rotated the same number of times as the number of strokes.
In other words, if the time on the clock is 8 o'clock, the pigeon body rocking cam 2
7 is rotated 8 times. The rotation speed of the pigeon body rocking cam 27 is detected by the switch cam 43 on the top surface of the gear 18 pressing the switch 45 (see FIG. 5). When the switch 45 opens and closes the same number of times as the number of strokes, the energization to the coil 38 in FIG. 1 is stopped. At this time, in FIG. 7, the arm 17 is at the peak of the pigeon body advancing/retracting cam 19, and the lock arm 34 is slightly separated from the lock pawl 41. That is, the lock pawl 41 is in an unloaded state, and the coil 3
When the power to the stator 3 is cut off, the permanent magnet 36
The lock pawl 41 returns to the position shown in FIG. 1 only by the static magnetic coupling force with 7, and thereby the lock pawl 41 also returns to the position shown by the solid line in FIG. However, the swing lever 16 is still in the swing position because the arm 17 is located at the peak of the pigeon body advancement/retraction cam 19. When the arm 17 falls from the peak to the trough of the pigeon body advancing/retreating cam 19, the swing lever 16 returns to the position shown in solid line in FIG. 7 by the spring force of the return spring 21 in FIG. After the slider 5, doors 3, 3 and pigeon body 11 return from the position shown in FIG. 3 to the position shown in FIG. 1, the motor _M1 stops.

Note that, in the present invention, a mechanism for swinging the pigeon body 11 and opening and closing its wing portions and beak portion is not an essential requirement. That is, this mechanism can be modified as appropriate, and if there is no need to impart such movement to the pigeon body 11, the pigeon body swing cam 27, intermediate lever 28, swing lever 31, etc. can be omitted.
Further, the switch cam 43 and the switch 43 can also be omitted if a motor with good rotation accuracy is used for the motor _M1 . Furthermore, the electromagnetic locking device can also be changed, for example, an armature (lever) that swings due to the action of an electromagnet.
It is also easy to lock and release the lock arm 34 by means of the lock arm 34.

The pigeon body drive device of the present invention is different from conventional devices that are linked to a rack-type counting mechanism, and can be separated from the watch mechanical body that drives the hands, and has a simple configuration, making assembly easy. Easy and inexpensive to manufacture. Furthermore, a large stroke can be easily obtained with respect to the back and forth movement of the pigeon body. Further, according to the electromagnetic lock device of this embodiment, the stator of a step motor for a watch can be used as is, and is suitable for reducing current consumption and cost.

[Brief explanation of drawings]

The drawings relate to an embodiment of the present invention, in which Fig. 1 is a partially sectional plan view when the pigeon body is in the retreated position, and Fig. 2 is a diagram showing the connection between the connecting lever equipped with the pigeon body and the arm of the door. 3 is a partially sectional plan view when the pigeon body is in the forward position; FIG. 4 is a sectional view taken along the line 3--FIG.
The figure is Fig. 3 - Line sectional view, Fig. 6 is Fig. 4 -
A line sectional view, and FIG. 7 is a relationship diagram showing the relationship between the pivot lever, the pigeon body advancing/retreating cam, and the lock pawl. 1...Frame body, 4...Guide rail, 5...Slider,
11... Pigeon body, 16... Swivel lever, 18... Gear, 1
9... Pigeon body advancement/retraction cam, 34... Lock arm, 35...
Rotating body, 36... Permanent magnet, 37... Stator, 38
...Coil, 41...Lock claw.

Claims (1)

[Scope of Claims] 1. A cuckoo clock in which a cuckoo body protrudes from a part of a frame body when making a time signal, comprising: a cuckoo body advancing/retracting cam that is rotationally driven by a motor that operates when making a time signal; a rotating lever that engages with a body advancement/retraction cam to move the pigeon body forward and backward; a movable body that is electromagnetically displaced; and an electromagnetic holding device that holds the pivot lever rotated by the pigeon body advance/retreat cam in a pivot position during a time signal operation. A cuckoo body drive device for a cuckoo clock. 2. In a cuckoo clock in which the cuckoo body protrudes from a part of the frame when making a time signal, the pigeon body advancing/retracting cam that is rotationally driven by the motor that operates when making the time signal engages with the above-mentioned pigeon body advancing/retracting cam. and an electromagnetic holding device that holds the pivot lever rotated by the pigeon body advance/retreat cam in a pivot position during a time signal operation, The electromagnetic holding device includes a rotating body having a permanent magnet that is rotatably supported in a positional relationship that overlaps a part of the rotating lever when it is in its original position; It consists of a locking pawl that can engage and disengage with the permanent magnet, and a stator that faces the permanent magnet and has a coil wound around it. When the coil is not energized, the locking pawl engages and disengages the permanent magnet. The lock arm is stably positioned outside the rotation locus due to static magnetic attraction to the stator, and when the coil is energized, the permanent magnet is rotationally displaced by the magnetic flux from the stator, so that the lock claw is attached to the lock arm. A cuckoo body drive device for a cuckoo clock, characterized in that the cuckoo body moves into the rotation locus of the cuckoo clock.