JPS59680A - Timepiece - Google Patents

Abstract

PURPOSE:To make hour-by-hour time difference corrections through simple structure without the need to readjust a minute hand by driving an hour hand in engagement with a fixed gear provided to the front cover of a timepiece. CONSTITUTION:The transparent discoid front cover 3 is fitted rotatably to the front surface of a main body case 1 with a frame 2 between. The fixed gear 4 having 11 teeth is made in the internal surface of the cover 13 concentrically with a center of rotation. The minute hand 10 is fitted to a minute hand shaft 6 and has an eccentric cam 9 around it. The hour hand 10 is fitted rotatable around the eccentric cam 9 through a cam hole 11 and has an internal gear 12 which engages the fixed gear 4. In an area with some time difference, only the cover 3 is rotated without operating a crown to adjust only the hour hand 10 without moving the minute hand 8. Consequently, hour-by-hour time-difference corrections are made through the simple structure without the need to readjust the minute hand.

Description

[Detailed description of the invention] This invention relates to a timepiece with time difference adjustment.

With conventional regular watches, when you move between regions with different time zones, the minute hand moves along with the minute hand, even though it would have been easier to adjust the time in units of time, so it was necessary to set the minute hand to the correct position again. There are also models that allow you to adjust only the hour hand, but these require levers and clutches, as well as a clock adjustment button, making the structure complicated and causing problems in terms of cost and reliability. there were.

Accordingly, an object of the present invention is to provide a timepiece that can adjust the time difference on an hourly basis, eliminates the need to readjust the minute hand, and has a simple structure.

One embodiment in which this invention is applied to a wristwatch is shown in FIGS. 1 to 4. In the figure, reference numeral 1 denotes a main body case, and a transparent disc-shaped front cover 3 is rotatably attached to the front surface of the main body via a frame 2. Front cover 3 has 11 bacteria on the inside.
Two fixed gears 4 are provided protrudingly concentrically with the rotation center. 5
is the clock movement housed in main case 1,
A minute hand shaft 6 is provided concentrically and protrudingly opposite to the fixed gear 4. The timepiece movement 5 houses a motor, a circuit block for driving the motor, and a battery, and is attached with a crown 7 that projects outward from the main case 1. 8 is a minute hand attached to the minute hand shaft 6, and has an eccentric cam 9 around the minute hand shaft 6. Reference numeral 10 has an internal gear 12 which is open at times, is rotatably attached to the rotation of the eccentric cam 9 through a cam hole 11, and meshes with the fixed gear 4. The internal gear 12 has 12 teeth. 13 is a dial. Marks 14 and 15 are provided on the main body case 1 and the m1 surface cover 3 to match their rotation angles.

Next, the operation of this watch will be explained. Since the minute hand 8 is attached to the clock movement 50 minute hand shaft 6, it rotates once every 60 minutes. The hour hand lO is fitted into an eccentric cam 9 fixed to the minute hand shaft 6 through a cam hole 11, and an internal gear 12 is meshed with the fixed gear 4, so that it is rotated by the drive of the minute hand shaft 6.

Since the fixed gear 4 has 11 teeth and the internal gear 12 has 12 teeth, the hour hand 10 changes by 1/1 when the minute hand 8 turns 1.
Rotate 12 times.

When setting the time, pull out and turn crown 7 to rotate minute hand shaft 6 and bring hour hand 10 and minute hand 8 to the correct positions. If you move to an area with a time difference, leave the crown 7 in place and close the front cover 3.
By rotating the hour hand 10, the minute hand 8 remains the same.
can only be moved. That is, since slippage occurs between the cam 9 and the cam hole 110, the minute hand 8 does not move. In this case, since the fixed gear 4 of the front cover 3 has 11 teeth and the internal gear 12 of the hour hand 10 has 12 teeth, one rotation of the front cover 3 can correct the time difference by one hour. . In this way, the time difference can be corrected on an hourly basis. Moreover,
Only by making the front force l<-3 rotatable, no special time difference correction parts are required, and the structure is simple.

In addition, in the @Kikyo example, the number of teeth of the fixed gear 4 was 11 and the number of teeth of the internal gear 12 was 12, but the number of teeth of the fixed gear 4 was set to 1.
1xn (n is an integer), the number of teeth of the internal gear 12 is 12xr
It may be one piece. Further, in the above embodiments, the eccentric cam 9 is provided integrally with the minute hand 8, but it may be provided separately.

As described above, in the watch of this invention, the transparent front cover is rotatably attached to the main body case, and the hour hand is driven by meshing with the fixed gear provided on the front cover, so that the time difference can be corrected in units of hours. There is no need to readjust the minute hand, there is no need to add any special parts, and the structure is simple.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the instant embodiment of this invention, Fig. 2 is a sectional view thereof, Fig. 3 is an exploded perspective view showing the minute hand and hour hand, and Fig. 4 is the relationship between the hour hand and the fixed gear. FIG. 1... Main body case, 3... Front cover, 4... Fixed gear, 5... Clock movement, 6... Minute hand shaft,
8...Minute hand, 9...Eccentric cam, 10...Hour hand, 1
1...Cam hole, 12...Internal gear Figure 2 So Figure 4 Procedural amendments imported) 1982 Patent No. 110502 2, Title of invention Clock 3, Amendment person case and Relationships Applicant Address 1048 Kadoma, Kadoma City, Osaka Name Name (
583) Matsushita Dengo Co., Ltd. Representative Iku Kobayashi 4, Agent 6, Specification subject to amendment 7, Contents of amendment (1) Features before the specification! f-Extract the description of the scope of the bribe as shown in the attached sheet. (2) In the second line of the Ming M11 Jin No. 3 shell, ``[An eccentric cam 9 is attached around the minute hand shaft 6''] is corrected to ``An eccentric cam 9 is attached to the minute hand 8''. (3) In the 11th and 12th lines of the third member of the detailed VTR, correct the phrase "minute hand 1+tl 6" to "minute hand 8". 1 1 2. Claims A main body case, and a transparent curved cover that is rotatably attached to the curved surface of the main case and has a fixed gear on the inner surface having a number of teeth of 11Xn (n is an integer) concentrically with the center of rotation. , a timepiece movement housed in the main body case and having a minute hand shaft protruding concentrically with the fixed number of teeth; a minute hand attached to the minute hand shaft; an eccentric cam attached to the minute hand or the minute hand shaft; A timepiece comprising: a cam hole that rotatably fits into the eccentric cam; and an hour hand having an internal gear having 12Xn teeth that meshes with the fixed gear and is concentric with the cam hole.

Claims (1)

[Claims] A main body case, a transparent front cover that is rotatably attached to the front of the main case and has two fixed wheels having a number of teeth of 1xn (n is an integer) on the inner surface concentrically with the center of rotation, and is stored in the main case. a clock movement having a minute hand shaft protruding concentrically with the fixed number of teeth, a minute hand attached to the minute hand shaft, an eccentric cam attached to the HK6 minute hand shaft, and rotatably fitted to the eccentric cam. A timepiece comprising an hour hand having a cam hole and an internal gear having 12×n teeth meshing with a fixed gear described in 1ItI, concentrically with the cam hole.