JPH0862348A - Pointer correcting mechanism for clock body - Google Patents

Abstract

PURPOSE: To prevent a pointer correcting handle from being rotated together with a pointer in a table clock or wall clock, prevent the point correcting handle from stopping or delaying the clock even by the contact with a wall, and make the pointer correcting handle lightly rotate, at pointer correction to facilitate the time correction. CONSTITUTION: A third wheel 17 arranged between a second hand wheel 15 and a minute hand wheel 21 is provided on a movable plate 41 capable of oscillating. The movable plate 41 has a correcting gear 3 having a slight clearance with a minute wheel 23, and an energizing force is added to the movable plate 41 so that the third wheel 17 is geared with the second hand wheel 15. When the movable plate 41 is oscillated against the energizing force, the correcting gear 35 gears with the minute wheel 23, and the gearing between the third wheel 17 and the second hand wheel 15 or minute hand wheel 21 is released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pointer correction mechanism for table clocks and wall clocks.

[0002]

2. Description of the Related Art Many of the analog timepieces currently in use use a motor having an accurate rotation speed within a unit time, such as a step motor, and usually rotate a rotor cana attached to a rotation shaft of the motor. First, it is transmitted to the 4th wheel, which is the second hand wheel, through a reduction gear called the 5th wheel, and is the small wheel of the second hand wheel that is rotated by the 5th pinion, which is the small diameter gear of the 5th wheel. The minute hand wheel that meshes with the third wheel, which is the small diameter gear of the third wheel, is rotated from the second hand wheel via the reduction wheel called the third wheel, and the hour hand wheel is rotated from the minute hand wheel via the reduction wheel called the Hino back wheel. The correction gear, which is manually rotated by the pointer correction knob, is engaged with the HINO wheel and the minute hand and the hour hand are rotated by rotating the pointer correction knob.

As a mechanism for preventing transmission of this rotation to the second hand and the motor when the pointer correction knob is rotated, a minute hand gear and a small diameter gear of the minute hand wheel are conventionally used as gears having a large diameter. Divide a certain minute hand kana and firmly attach the minute hand kana that meshes with the Hino back wheel to the minute hand shaft 3
The minute hand wheel that meshes with the third wheel of the number wheel is attached to the minute hand wheel so that it can slip, and the rotation transmitted from the motor to the minute hand wheel via the second hand wheel or the third wheel is transmitted to the minute hand wheel. Although rotating the shaft and further rotating the hour hand wheel and hour hand shaft through the Hino-back wheel, when rotating the minute hand kana from the correction knob at high speed through the Hino-back wheel, the minute hand kana and minute hand gear Slippage occurs, the minute hand pinion can be rotated by rotating the minute hand pin and the hour hand pin by rotating the minute hand pin and the hour hand pin by rotating the minute hand pin and the second hand pin by not rotating the minute hand pin with the minute hand pin. The rotation of the knob for adjusting the pointer is not transmitted to the motor or the motor.

[0004]

As described above, in the pointer correction mechanism provided with the correction gear that meshes with the Hino back wheel, when the hour hand and the minute hand are moved by the normal rotation of the motor. , The pointer adjustment knob is also rotating in accordance with the rotation of the hour hand and minute hand, and in table clocks and wall clocks, this pointer adjustment knob may come into contact with the wall, etc., and this pointer adjustment knob comes into contact with the wall etc. At this time, an undesired load is applied to the motor, which may cause adverse effects such as the clock stopping and the display time being delayed.

Further, the structure in which the minute hand gear and the minute hand pinion are separated complicates the manufacture of the minute hand wheel and the assembly of the timepiece body, and further, when the knob for adjusting the pointer is rotated to align the position of the pointer, Due to the slip resistance between the minute hand gear and the minute hand pinion, rotation of the pointer adjustment knob is heavy, and with a watch body placed in a position where it is difficult to apply force, it may not be possible to easily rotate the pointer adjustment knob. there were.

[0006]

According to the present invention, a third wheel & pinion arranged between a second hand wheel and a minute hand wheel is attached to a movable plate which can be swung, and a correction gear is also attached to the movable plate. By urging the movable plate in a certain direction, the third wheel and the third wheel can be normally engaged with the second hand wheel and the minute hand wheel, respectively.
In addition, a slight gap is created between the correction gear and the Hino-Ura-wheel, and when the movable plate is swung, the correction gear and the Hino-Ura-wheel mesh with the third wheel. The third wheel and the correction gear are provided on the movable plate so that the third wheel can be removed from the second hand wheel and the third pinion can be removed from the minute hand wheel.

[0007]

[Operation] In the present invention, since the third wheel and pinion is attached to a movable plate that can be swung, the third wheel and third pin can be meshed with the second and minute hand wheels by swinging the movable plate. It can be disengaged. Also, since the movable plate is provided with a correction gear so that a slight gap is formed between the movable plate and the Hino back wheel, the correction gear is oscillated by swinging the movable plate. Can be engaged with.

Normally, the third wheel and the third pinion are meshed with the second hand wheel and the minute hand wheel by the urging force. Therefore, the rotation of the second hand wheel is decelerated and transmitted to the minute hand wheel through the third wheel. When the movable plate is swung, the correction gear meshes with the Hino back wheel and, on the other hand, the third wheel or third pinion disengages from the second hand pinion or minute hand wheel. Even if the minute hand wheel and the minute hand wheel rotate together with the minute hand wheel and hour wheel by the correction gear,
Since the second wheel and minute hand wheel and the second wheel and pinion are out of mesh with each other, the rotation of the correction gear can be prevented from being transmitted to the second hand wheel.

[0009]

EXAMPLE A train wheel having a pointer correcting mechanism according to the present invention is
As shown in FIG. 1, the rotor pinion 12 meshes and rotates 5
It has a number wheel 13, has a second hand wheel 15 which meshes with a fifth wheel 14 which is formed integrally with the fifth wheel 13 and has a small diameter, and meshes with a second hand wheel 16 which is a small diameter gear of the second hand wheel 15. A minute hand pinion that has a third wheel 17 and has a minute hand wheel 21 that meshes with a third pinion 18, which is a small-diameter gear wheel of the third wheel 17, and that is integrated with the minute hand wheel 21 to be a small-diameter wheel of the minute hand wheel 21. It has a large gear of the Hino back wheel 23 that meshes with 22, and an hour wheel 25 that meshes with the small gear 24 of the Hino back wheel 23, and rotates the rotor pinion 12 attached to the rotation shaft of the motor 11 by 5 times. The second hand wheel 15, the minute hand wheel 21, and the hour hand wheel which are coaxially transmitted by decelerating sequentially to the number wheel 13, the second hand wheel 15, the third wheel 17, the minute hand wheel 21, the Hino back wheel 23, and the hour hand wheel 25. The timepiece body for displaying the time is formed by rotating 25 at a predetermined speed.

In the present embodiment, as shown in FIGS. 1 and 2, with respect to a swing shaft 43 fixed to an intermediate plate 39 that rotatably supports each wheel train gear such as the minute hand wheel 21. A movable plate 41 is swingably mounted, the third wheel 17 is mounted on the movable plate 41, and an elastic body such as a spring as shown in FIG.
Use 51 to turn the third wheel 17 into the second hand wheel 15 and the third wheel of the third wheel 17
A biasing force is applied to the movable plate 41 so that 18 is meshed with the minute hand wheel 21, and a correction gear 35 is provided on the movable plate 41 so that a slight gap is provided between the movable plate 41 and the Hino back wheel 23. It is a thing.

Furthermore, the movable plate 41 is provided with a drawstring 55 such as a wire, and a handle 56 attached to the end of the drawstring 55 is a wall clock positioned outside the exterior of the watch body. By pulling on the drawstring 55,
As shown in FIG. 3, it is assumed that the movable plate 41 can be swung about the swing shaft 43 so that the correction gear 35 can be meshed with the Hino rear wheel 23. When meshed with 23, the mesh between the 3rd wheel 17 and second hand pinion 16 disengaged,
The structure in which the mesh between the third pinion 18 and the minute wheel 21 is also disengaged.

Therefore, the handle exposed to the outside of the watch body
When 56 is pulled and the pulling gear 55 is fixed with the correction gear 35 meshing with the Hino-back wheel 23 and the pointer correction knob 31 is rotated, the correction gear 35 causes the Hino-back wheel 23 to rotate. , The minute hand wheel 21 and the hour hand wheel 25 can be rotated to correct the position of the hands. At this time, the third wheel 17 and the third pinion 18 are separated from the second hand pinion 16 and the minute hand wheel 21, so the minute hand wheel Since the rotation of 21 is not transmitted to the second hand wheel 15 and the motor 11 and the slip mechanism is not provided unlike the conventional case, the rotation of the pointer correction knob 31 can be lightened to correct the pointer. it can.

In this embodiment, the third wheel & pinion 17 is disengaged from the second hand pinion 16 and the third pinion 18 is disengaged from the minute hand wheel 21, but the meshes of the third wheel 17 and third pinion 18 are both disengaged. Not only in the case, the rotation of the minute hand wheel 21 is transmitted to the second hand wheel 15 even if the third wheel 17 and the second hand pinion 16 or the third pinion 18 and the minute hand wheel 21 are out of engagement. In the case where only one of the meshes is completely disengaged, the swing shaft 43 and the movable plate 41 can be easily arranged in shape, which in turn can facilitate the assembly of the timepiece.

Further, instead of the drawstring 55, a slide stopper 61 having an inclined portion 63 is used as shown in FIG.
The movable plate 41 is provided with an abutting portion 47 and a cutout portion 45 which match the inclination of the inclined portion 63, and as shown by the broken line in FIG.
Slide stopper 61 from the state where the contact portion 47 and the contact portion 47 are joined.
By moving the movable plate 41 about the swing shaft 43 so as to move the left end of the movable plate 41 downward against the biasing force of the elastic body 51 due to the inclination of the inclined portion 63, As shown by the solid line in FIG.
Is stopped with the left end pressed down, the correction gear 35 is brought into mesh with the Hino back wheel 23 in this state, and the slide stopper 61 is moved to move the movable plate 41 to the elastic body 51.
The correction gear 35 is designed to swing against the urging force of
And the engagement of the third wheel 17 and the third pinion 18 with the second hand pinion 16 and the minute hand wheel 21 may be adjusted.

Further, the pointer correction knob 31 is provided with a movable plate 41.
As shown in FIG. 5, the correction gear 35 provided on the movable plate 41 is not only coaxial with the correction gear 35 provided on the movable plate 41.
When the gear meshes with the Hino back wheel 23, the correction gear 35 may simultaneously mesh with the gear 33 provided on the rotary shaft 32 of the correction knob 31. In this case, even if the correction gear 35 moves due to the swinging of the movable plate 41, the pointer correction knob 31 does not move, and the operation of the pointer correction knob 31 becomes easier.

[0016]

According to the present invention, the third wheel is provided on the movable plate, and the third wheel is disengaged for transmitting the rotation of the second hand wheel to the minute hand wheel by swinging the movable plate. The rotation of the dial is light, and the time can be easily adjusted, and during normal operation, a gap is formed between the correction gear and the Hinoura wheel, so that the pointer adjustment knob can be rotated. Even if the pointer correction knob comes into contact with a wall, the load applied to the pointer correction knob will not be transmitted to the motor, and the pointer will not be stopped or the display time will not be delayed. You can

Further, since the rotation of the minute hand wheel is not transmitted to the second hand wheel by disengaging the third wheel and pinion, it is not necessary to separate the main body of the minute hand wheel from the minute hand pinion, and the minute hand wheel is integrally molded. To facilitate the manufacturing and assembly of the watch body,
Backlash of the minute hand can be easily prevented by reducing rattling of the minute hand wheel.

[Brief description of drawings]

FIG. 1 is a plan view of a train wheel having a correction mechanism according to the present invention.

FIG. 2 is a side view of a train wheel having a correction mechanism according to the present invention.

FIG. 3 is a view showing a pointer correction state of a train wheel having a correction mechanism according to the present invention.

FIG. 4 is a view showing an improved example of the correction mechanism according to the present invention.

FIG. 5 is a view showing another embodiment of the correction mechanism according to the present invention.

[Explanation of symbols]

11 Motor 12 Rotor Kana 13 5th Wheel 14 5th Kana 15 Seconds Hand Wheel 16 Seconds Hand Kana 17 3rd Wheel 18 3rd Kana 21 Minute Hand Wheel 22 Minutes Hand Kana 23 Day Back Wheel 25 Hour Hand Wheel 31 Pointer Adjustment Knob 32 Pointer Adjustment Knob Axis 33 gears 35 correction gears 39 middle plate 41 movable plate 43 swing shaft 45 notch 47 abutment 51 elastic body 55 pullout string 56 handle 61 slide stopper 63 slanted part

Claims (1)

[Claims] 1. A modification in which a third wheel & pinion disposed between a second hand wheel and a minute hand wheel is provided on a swingable movable plate, and the movable plate is provided with a slight gap between the movable plate and the Hino back wheel. Also has gears for
A biasing force is applied to the movable plate so that the third wheel and the third pinion of the third wheel mesh with the second hand wheel and the minute hand wheel, and when the movable plate is swung against the biasing force, the correction gear And a second hand wheel, and at least one of a third wheel and a second hand wheel and a third hand wheel and a minute hand wheel is disengaged from the other hand.