JP2503347B2 - Date display device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a date display device for a timepiece, particularly a wristwatch. It is fed and switched in one step every 10 days, and on the surface of the number one disc,
0 to 9 single digits or multiples of this number, which are oriented substantially radially and are evenly distributed in concentric circles,
Moreover, on the surface of the tens digit disc, the tens digits of 1 to 3 and the blank place or the tens digit of a multiple of this number are arranged in a concentric circle and oriented substantially in the radial direction. , In this case, one consistent notch corresponding to the number size is formed in the tens digit disc between the tens digit and between the tens digit and the blank space. The numeral discs are arranged parallel to each other so that the 1st digit disc and the 10th digit disc overlap in the range of the display position, in which case the 10th digit and one of the notches are read at the display position. The possible single digits and the possible numbers form a two-part number, which number is readable through the date window of the clock face.

[0002]

2. Description of the Related Art In the case of such a known date table device, the circumferential ranges of the first-order numeral disc and the tenth-order numeral disc which are configured as solid disks intersect at the display position. The disadvantage of this is that the display position cannot be located in the edge region of the dial and thus the display region is often covered by the pointers of the other display members of the timepiece.

Further, the free selectivity of the arrangement of display positions is also extremely limited.

Another drawback is that the range of disk placement is relatively large and thus requires a large construction space. Further, even in this range, the arrangement of another display member is hindered by the penetrating guide of the drive shaft with respect to the drive mechanism.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to provide a display device of the type mentioned at the outset in which a relatively large number can be displayed, and at the same time the arrangement of the display positions can be selected very freely and the construction space is small. It is to provide a date display device.

[0006]

SUMMARY OF THE INVENTION According to the present invention, the above object is achieved by providing an outer peripheral contour of a small-diameter disc of a one-digit numeral disc or a ten-digit numeral disc and an outer circumferential contour of a disc having a rotation axis of at least approximately a large diameter. It is arranged inside the circumferential contour, and the large-diameter disc is configured as an annular disc, and the one-digit numeral disc and the ten-digit numeral disc are the circumferential contours of the one-digit numeral disc and the ten-digit numeral disc. Have been solved eccentrically with respect to each other so that they are almost in contact in place.

[0007]

With this construction, the disc can have a relatively large number and thus the date can be read easily. Furthermore, the display range can be provided in the circumferential edge region of the annular disc.

Since the components of the date display device do not project from the outer circumferential contour of the date display device, the display range can be arranged very freely and in the edge region of the dial.

It is also possible without difficulty to guide the drive shaft of a small-diameter disc and, if necessary, the drive shaft of another display member of the timepiece via the annular disc hole of the annular disc.

Furthermore, if the date drive is arranged radially inward of the circumferential contour of the annular disc bore, the construction space required is particularly small.

Furthermore, an annular disc configured as a one-digit numeral disc is provided with an inner tooth ring on the circumferential contour of the annular disc hole, in which case the drive pinion of the date drive is engaged. Allows the date drive to be configured flat.

If the drive pinion is feed-switched by the one-digit number program wheel via the intermediate wheel in one step every day, in which case a one-step feed switching interruption is performed after 30 step feed switching, the one-digit number is changed. The disc is switched 30 times and the number 1 of the number one disc is displayed at the display position on the 31st day of the month.

Next, one-step feed switching interruption is performed. This is because on the next day the number 1 for the first day of the next month must be displayed again.

With this configuration, it is not necessary to arrange two numeral 1 on the first digit numeral disk, and it is sufficient to arrange only one numeral 1. This reduces the size of the annular disc or allows larger numbers to be displayed.

A small-diameter disc configured as a tens digit disc is switched in one step per day by the tens digit program wheel via a pinion non-rotatably connected to the disc, in this case the first feed changeover. When the feed switching interruption of the next 8 steps, the feed switching interruption of 9 steps after the second feed switching, the feed switching interruption of 9 steps after the third feed switching and the one step switching interruption after the fourth feed switching are performed After displaying the number 3, the blank part of the tens digit disc is moved to the display position, while the number 1 is simultaneously displayed by the tens digit disc.

After another eight times of feed switching interruptions, the feed switching of the tens digit disc is performed to display 10. A tens digit disk feed switch is made to display 20 after another 9 feed switch breaks and to display 30 after the next 9 feed switch breaks.

Then only one feed-switch interruption is required, during which the first-digit number disc is feed-switched from the 30th to the 31st day and the cycle is restarted anew.

In order to accurately position the tens digit at a predetermined rest position after the feed change, the pinion is spring-elastically engaged in the tooth by means of a tens digit locking body, between which the pinion position is rested. Locked in.

The small structural space requirement is that the one-digit numeral program wheel and the ten-digit numeral program wheel are non-rotatably connected to the program driving wheel, which is switched by the intermediate wheel in one step per day. It is obtained by being done.

In order to position the program drive wheel exactly in the predetermined rest position after the feed change, the program drive wheel is engaged in the rest position between the two steps by means of a spring-elastically engaging engagement in the tooth. Be stopped.

Driving the date drive by means of a clockwork is simply carried out by driving the intermediate wheel by a clockwork transmission wheel of the watch.

In order to obtain the required large reduction ratio and the engagement of the intermediate wheel into the program drive wheel for feed switching at a low cost, the intermediate wheel can be driven to rotate one revolution per day and is programmed. It has a protruding feed switching pin that engages the drive wheel.

This allows the date drive to be decoupled from the clockwork outside the range of the feed switching process.

If the program-driven wheel is step-by-step switched by a manually operable switching pawl, in the case of months of 30 days or less it can be manually switched and adjusted to the actual date. it can.

In order to position the digit in the predetermined rest position exactly after the feed change, the intermediate wheel is rested between the two steps by means of a one-digit stop which is spring-elastically engaged in the tooth. Locked in.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The illustrated date display device has a one-digit numeral disc 1 which is constructed as an annular disc, the surface of this one-digit numeral disc being approximately radially inward and concentric in the circumferential range. The numbers 0 to 9 are evenly distributed over the print.

Inside the outer circumferential contour 2, a tens digit disc 3 is rotatably supported about a rotation axis 4 in a parallel plane above a rotatably mounted first digit disc 1. Has been done.

In this case, the tens digit disc 3 is eccentric to the tens digit disc so that the circumferential contours 2 and 5 of the tens digit disc 1 and the tens digit disc 3 come into contact with each other at a predetermined position. It is arranged.

The tenth digit disc 3 is the first digit disc 1
On the side opposite to, there are provided numbers 1 to 3 and blanks 6 which are distributed radially inwardly and concentrically in the circumferential range.

At the display position occupied by the ten's digit 3 and the one's digit 0 in FIG. 1, the illustrated numbers on both disks 1, 3 are such that a two-part number is displayed or a blank space 6 Are positioned in parallel with each other so that the first digit is displayed with the right side being displayed.

In order to allow the user to directly read the ones digit in cooperation with the respective tens digit in parallel with each other, the tens digit disk 3 is provided between or adjacent to each other. Between the space and the empty space 6, a notch 7 having a larger area than the area occupied by the first digit disk 1 is provided. As a result, the tens digit disk 3 has a substantially cruciform shape.

A date driving device 9 is arranged on the inner side in the radial direction of the circumferential contour of the annular disc hole 8. The date drive is driven by a drive wheel 10 of a clockwork (not shown) of a timepiece, in which case a pointer tube 11 in which the drive wheel is arranged is guided through an annular disc hole 8.

Drive wheel 10 allows intermediate wheel 1
2 is driven with one rotation every 24 hours. Intermediate wheel 12
Has a feed changeover pin 13 projecting axially from the plane of the intermediate wheel, which feed changeover pin is 24
Once in time, it engages one tooth of the program drive wheel 14 with 31 teeth and feed switches the program drive wheel one tooth. As a result, the program-driven wheel rotates stepwise in one revolution in 31 days.

A one-digit numeral program wheel 15 and a ten-digit numeral program wheel 16 are non-rotatably connected to the program drive wheel 14 coaxially and in a sandwich form. The first digit program wheel 15 and the tenth digit program wheel 16 are provided with a tooth pitch of 62 teeth.

An intermediate wheel 17 having six teeth can be rotatably driven by a one-digit numeral program wheel 15, which is coaxially pivoted to a large-diameter drive pinion 18 configured as a connecting link wheel. Impossiblely combined.

Similarly, a drive pinion 18 with six teeth
Engages in an inner annulus 19 with 20 teeth,
This inner tooth ring is configured on the circumferential contour of the annular disc hole 8. As a result, the first-place numeral disc 1 is driven stepwise at three revolutions per month.

When the feed is switched from the 31st day of the month to the 1st day of the next month, the blank portion 6 of the tens digit disk 3 is moved to the display position, whereas the blank digit disk 1 of the first digit disk 1 which already occupies the display position. To keep the number 1 in this position,
The first digit program wheel 15 is provided with a groove 20 of two teeth at appropriate points. This results in a one-step feed switching interruption.

The pinion 21 with eight teeth is switched by the tens digit program wheel 16 once a month, and this pinion is non-rotatably connected to the tens digit disk 3 via a shaft 22. There is. In this case, the shaft 22 is guided via the annular disc bore 8.

Although the tens digit program wheel 16 has a tooth pitch of 62 teeth, it actually has only 4 teeth as shown in FIG. A first tooth groove 25 of 16 teeth is provided between the first tooth 23 and the second tooth 24, and this tooth groove causes a first feed switching interruption of 8 steps. To be

Between the second tooth 24 and the third tooth 26, and between the third tooth 26 and the fourth tooth 27, there are 18 toothed second tooth spaces 28 and third toothed teeth, respectively. A groove 29 is provided, which causes a second and a third feed changeover interruption of 9 steps each.

A fourth tooth groove 30 is formed between the fourth tooth 27 and the first tooth 23, and this tooth groove causes a one-step fourth feed switching interruption.

This allows the teeth 23, 24, 26, 27 to feed the tens digit disk 3 from the 9th to the 10th, the 19th to the 20th, the 29th to the 30th and the 31st to the 1st of the next month. Switching is performed.

In order to hold the 1-digit numeral disc 1 and the 10-digit numeral disc 3 in the rest position accurately after one-step feed switching, there is a 1-digit numeral locking body 31 in the intermediate wheel 17 and in the pinion 21. The tenth digit locking body 32 is elastically engaged with the spring.

In the same manner, the program drive wheel 14 is held in the rest position by the locking body 45.

As shown in FIG. 5, the program drive wheel 14 is movable in the feed switching direction by the switching pawl 33. For this purpose, the switching claw 33
Has a two-armed lever that can be swiveled about a swivel axis 34, one lever arm of which has a switching tooth 35 and the other lever arm is manually actuated by a spring 36. Can be loaded against.

Switching teeth 3 held disengaged from the program drive wheel 14 by a spring in the rest position
5 is engaged with the teeth of the program drive wheel 14 by manually loading and swiveling the switching pawl 33 and switches the program drive wheel by one tooth spacing per operating stroke.

This allows the date display to be set to the actual date after months shorter than 31 days.

The dial 37 shown in FIG. 2 is provided with a date window 38 in the edge area, and the numbers of the first digit disc and the tenth digit disc 3 occupying the display positions are enlarged by the date window. You can see.

In the embodiment shown in FIG. 6, not only the ones digit disc 1 but also the tens digit disc 3'is constructed as an annular disc. In this case, the number one disc 1
And the tens digit disks 3'have approximately the same diameter and are arranged coaxially to each other.

Similar to the case of the 1-digit numeral disc 1, the circular contour of the annular disk hole 39 of the 10-digit numeral disc 3'is also provided with teeth for driving the 10-digit numeral disc 3 '.
This embodiment is also a structure for implementing the idea of the present invention.

FIGS. 7 and 8 illustrate that the date display device, as shown in FIG. 1, can be incorporated in a watch with various display dials in a small space requirement. ing.

In addition to the date window 41, the dial 40 shown in FIG. 7 has a rate display member 42, a time display member 43 for hours and minutes, and a separate second display member 44.

[Brief description of drawings]

FIG. 1 is a plan view of a date display device.

FIG. 2 is a diagram showing a dial of a timepiece having the date display device of FIG.

FIG. 3 is an exploded perspective view of a one-digit numeral program wheel, a ten-digit numeral program wheel and a program driving wheel of the date display device of FIG.

FIG. 4 is a plan view of the date display device shown in FIG.

FIG. 5 is a plan view of a unit including a program drive wheel, a locking body, and a switching claw of the date display device.

FIG. 6 is an exploded perspective view of a first-place numeral disc and a ten-place numeral disc according to a second embodiment.

7 is a second embodiment of a dial of a timepiece having the date display device of FIG.

FIG. 8 is a plan view of the date display device of the timepiece shown in FIG.

[Explanation of symbols]

 1 1st digit disc 2, 5 Circumferential contour 3, 3'10th digit disc 4 Rotation axis 6 Blank part 7 Notch 8, 39 Annular disc hole 9 Date drive device 10 Drive wheel 11 Pointer tube 12, 17 Intermediate wheel 13 Feed switching pin 14 Program drive wheel 15 1st digit program wheel 16 10th digit program wheel 18 Drive pinion 19 Inner tooth ring 20, 25, 28, 29, 30 Tooth groove 21 Pinion 22 Shaft 23, 24, 26, 27 Tooth 31 1st place number locking body 32 10th place number locking body 33 Switching claw 34 Swivel axis 35 Switching teeth 36 Spring 37,40 Dial 38,41 Date window 42 Rate preliminary display member 43 Time display member 44 Second display member 45 Locking body

Claims (12)

(57) [Claims] 1. A date display device for a timepiece, especially a wristwatch, wherein a one-digit numeral disc is fed in one step every day and a tenth digit disc is fed in one step every ten days by a date driving device which can be driven by a clockwork. It is switched and driven, on the surface of the 1st digit disk, is directed substantially in the radial direction and is uniformly distributed in concentric circles, and the 1st digit of 0 to 9 or the 1st digit of this number and the 10th digit. On the surface of the numeral disc, there are arranged tens digits of 1 to 3 and blank portions or a tens digit of a multiple of this number, which are oriented substantially radially and uniformly distributed in concentric circles. One consistent notch corresponding to the number size is formed between the ten-digit numbers and between the ten-digit numbers and the blank space in the ten-digit number disc. Discs are arranged side by side in parallel so that the 1st digit disc and the 10th digit disc overlap in the range of the display position, in which case it is readable through the 10th digit and one of the notches at the display position In a format in which a two-part number is formed by the first digit and the number can be read through the date window of the clock face, the small diameter of the first digit disc or the tenth digit disc The outer circumferential contour (5) of the disc and the axis of rotation (4) are arranged at least inside the outer circumferential contour (2) of the disc of large diameter, and the large disc is annular disc. Is configured as a number one digit
Discs and tens digit discs
And the circular contour (2, 5) of the 10th digit disc is in a predetermined position
A date display device, characterized in that they are arranged eccentrically with respect to each other so that they are almost in contact with each other . 2. The date drive (9) is arranged radially inward of the circumferential contour of the annular disc hole (8),
The date display device according to claim 1. 3. An annular disc configured as a one-digit disc (1) is provided with an inner toothed ring (19) in the circumferential contour of the annular disc hole (8), in which the date drive device is arranged. The drive pinion (18) of (9) is engaged,
The date display device according to claim 1. 4. The drive pinion (18) has a first digit program wheel (15) via an intermediate wheel (17).
4. The date display device according to claim 3, wherein the feeding is switched by one step every day by the step, and in this case, the feeding switching is interrupted by one step after the feeding switching by 30 steps. 5. A small-diameter disc configured as a tens digit disc (3, 3 ') is daily by a tens digit program wheel (16) via a pinion (21) non-rotatably connected to the disc. The feed is switched in one step. In this case, the feed switching is interrupted 8 steps after the first feed switching, the feed switching is interrupted 9 steps after the second feed switching, the feed switching is interrupted 9 steps after the third feed switching, and the fourth feed switching is interrupted. 5. The date display device according to claim 4, wherein one-step switching interruption is performed after switching the feeding. 6. Date according to claim 5, characterized in that the pinion (21) is locked in the rest position between the two steps by means of a ten-digit lock (32) which spring-elastically engages in the tooth. Display device. 7. A ones digit program wheel (15) and a tens digit program wheel (16) are non-rotatably connected to a program drive wheel (14), said program drive wheel being provided by an intermediate wheel (12). 2. The feeding is switched in one step every day.
7. The date display device according to any one of 1 to 6. 8. Date display according to claim 7, characterized in that the program drive wheel (14) is locked in the rest position between the two steps by a locking body (45) which spring-elastically engages in the tooth. apparatus. 9. The date display device according to claim 7, wherein the intermediate wheel (12) is drivable by a clockwork transmission wheel (10) of the timepiece. 10. The intermediate wheel (12) can be rotationally driven once per day and has a program driven wheel (1).
8. Date display device according to claim 7, characterized in that it has a protruding feed switching pin (13) which engages with 4). 11. The date display device according to claim 7, wherein the program-driven wheel (14) can be stepwise fed and switched by a manually operable switching pawl (34). 12. The intermediate wheel (17) is lockable in a rest position between two steps by means of a one-digit lock (31) which spring-elastically engages in the tooth. Date display device.