JP2008537156A - Compensation device for the synergistic effect of watches called mysteries - Google Patents

Abstract

So-called mysterious watch (1) comprising a seconds arbor (2), a minute pipe (3) and an hour pipe (4) driven respectively by a seconds (5), minute (6) and hour (7) toothed disc. These discs (5, 6, 7) which are at least partially transparent are mounted coaxially between the dial (8) and the back (9) of the watch (1). The movement of these toothed discs (5, 6, 7) is transmitted by drive members confined invisibly within the ring (11) of the watch (1) case. Said case possesses a device comprising a "false seconds" disc (10), a double setting wheel (12) and at least one intermediate gear train (14). The "false seconds" disc (10), identical in mass and diameter to the seconds disc (5), is fitted freely on the perimeter of the hour pipe (4). The double setting wheel (12) transmits the speed of rotation of the seconds disc (5) to the "false seconds" disc (10). The intermediate gear train (14) gives the "false seconds" disc (10) the opposite direction of rotation to that of the seconds disc (5). This device thus compensates for rate errors if the wrist is moved suddenly.

Description

  The present invention refers to the watchmaking field, and more particularly to a mystery comprising a plurality of transparent wheels that are mounted coaxially and rotated via a drive mechanism that is mounted in an invisible manner within the annulus of the case. The present invention relates to a compensation device for synergism of a wristwatch.

  A transparent wristwatch, generally called a mysterious wristwatch, in which the movement of the pointer is transmitted via a transparent gear, is already part of the prior art. Patent CH639812 and document EP0673519 describe such a device.

  EP 0673519 discloses a transparent watch equipped with second, minute and hour hands whose movement is distributed through a transparent train of wheels driven by one or more motors housed in a watch case ring. .

  This type of wristwatch can suffer from operational deviations that can be caused by sudden wrist movements. In fact, such movement can accelerate or decelerate various cars and can result in a loss of watch accuracy.

  It is an object of the present invention to provide a watch, referred to as a mystery, comprising a device intended to compensate for synergies that can be caused by wrist movements.

  According to the present invention, this object includes a second wheel, a minute wheel shaft and a hour wheel shaft which are respectively driven by a second wheel, a minute wheel and an hour wheel arranged between the dial and the bottom of the wristwatch case. This is achieved by the mysterious wristwatch according to claim 1. The dial and the bottom of the watch case and the car are at least translucent. Since these wheels have teeth on the outer periphery, they can be driven by a transmission mechanism that is housed in an invisible manner in the ring of a watch case called a mystery. The wristwatch includes a device called a “virtual seconds”, a device that includes a two-stage pinion and at least one intermediate cog wheel. A car called “virtual second” is movably mounted around the hollow shaft and is driven by a two-stage pinion that transmits the rotation speed of the second wheel to the virtual second. The intermediate cog wheel ensures that the rotation direction of the “virtual second” wheel is reversed from that of the second wheel.

  The features of the present invention will become more clearly apparent from the teachings of the description of the embodiments given by way of example only and without limitation with reference to the following schematic drawings.

  According to the main embodiment of the present invention, a wristwatch (1) referred to as “Mystery” has a second wheel (5) interlocked with the shaft (2) and a minute wheel (5) interlocked with the minute hollow shaft (3). 6) and a bracelet type wristwatch including an hour wheel (7) interlocked with an hour hollow shaft (4) (FIG. 4).

  A stepping motor (not shown) located within the periphery of the ring (11) of the case of the watch (1) applied by a plurality of batteries (not shown) moves in a first manner as shown in FIG. This is transmitted to the second wheel (5) via the cogwheel gear train (16). On the one hand, the transmission of movement from the second wheel (5) to the minute wheel (6) and on the other hand from the minute wheel (6) to the hour wheel (7) is respectively the ring (11) of the case of the watch (1). Realized by a second (17) and third gear train (not shown) disposed within.

  In order to compensate in particular the effect of wrist movement on the second wheel (5), the device comprises a wheel (10), a two-stage pinion (12) and at least one intermediate cog wheel (called “virtual second”) ( 14) and incorporated into the watch (1). A “virtual second” wheel (10) is movably mounted around the hour hollow shaft (4) and placed on the large diameter of the hour hollow shaft (4) (FIG. 4), while the two-stage pinion (12) And the intermediate cog wheel (14) is received in the 1 o'clock position in an invisible manner in the ring (11) of the case of the watch (1) (FIG. 1).

  According to FIG. 3, the car is driven by a two-stage pinion (12). This is arranged in such a way that the intermediate cog wheel (14) can transmit the movement of the second wheel (5) to the lower pinion (18) of the two-stage pinion (12). The upper gear (19) transmits the rotation speed of the second wheel (5) to the “virtual second” wheel. The rotation of the “virtual second” wheel is opposite to that of the second wheel (5).

  Since the fixed intermediate wheel (13) (FIG. 4) is arranged between the second wheel (5) and the minute wheel (6), the minute wheel (6), the hour wheel (7), and the virtual second wheel (10) and the shaft (2) and the hollow shafts (3, 4) are supported.

  The spacing washer (20) is placed on the hollow shaft (4) between the dial (8) and the “virtual second” wheel (10), while in the case of the watch (1) The displacement of the movement in the vertical direction is prevented, while the horizontal rotation of the “virtual second” wheel (10) is ensured.

  The bottom (9) of the case of the various cars (5, 6, 7, 10 and 13) and the dial (8) and the watch (1) are transparent and made of sapphire.

  Since the second wheel (5) and the "virtual second" wheel (10) have the same mass and diameter, the moments of inertia of the two wheels (5, 10) are the same.

  As the moment of inertia characterizes the ability of an object to move, the resulting device as described above prevents misalignment during a sudden movement of the wrist. Actually, when the wristwatch (1) undergoes a sudden movement, the rotational speed of the second wheel (5) has a tendency to either accelerate or decelerate. In such a case, the wheel (5) exerts a force on the lower pinion (18) of the two-stage pinion (12) through the intermediate cog wheel (14). This force is overridden by a “virtual second” wheel (10) that exerts an opposite direction force of the same strength on the upper pinion (19) of the two-stage pinion (12). As a result, synergies are compensated and thus a shift in the operation of the watch (1) is avoided.

  In a second embodiment of the present invention, the at least one rotating transparent part and / or the at least one non-rotating transparent part includes a drawing to create an image, which is preferably a moving image. As a non-limiting example, a mysterious wristwatch (1) according to the present invention has a first drawing engraved on the dial (8), a second image engraved on the second wheel (5) and “virtual” It may include a third image engraved on the "second" wheel (10).

  The main purpose of the virtual second wheel (10) is to compensate for the synergistic action of the wristwatch (1), but due to its rotation in the opposite direction to the second wheel (5), it is an ingenious that cannot be reproduced by a conventional mysterious wristwatch. Realization of moving images is possible as well.

  Of course, the present invention is not limited to the embodiment described above by way of example, and conversely covers all modifications.

1 represents a dial side view of a wristwatch called Mysteries according to the present invention, including partial views at 2 o'clock and 5 o'clock, respectively. Fig. 2 represents a detailed view of the compensator located at 2 o'clock in the ring of the watch case of Fig. 1; FIG. 3 represents a cross-sectional view along the line BB in FIG. An axial partial cross section of a mysterious wristwatch is shown.

Claims (10)

  A second shaft (2), a minute hollow shaft (3) and a hour hollow shaft (4) driven by a second gear (5), a minute gear (6) and an hour gear (7), respectively, 7) is at least translucent and is arranged coaxially between the dial (8) and the bottom (9) of the case of the watch (1), the movement of the gears (5, 6, 7) being A wristwatch (1) called mystery transmitted by a drive mechanism housed in an invisible manner in a ring (11) of the case of the wristwatch (1), wherein the wristwatch (1) is "virtual second" And a device comprising a two-stage pinion (12) and at least one intermediate cog wheel (14), said "virtual second" wheel (10) being said hollow shaft ( 4) is movably mounted around and transmits the rotation speed of the second wheel (5) to the virtual second wheel. Driven by the two-stage pinion (12), the intermediate cog wheel (14) surely reverses the direction of rotation of the "virtual second" wheel (10) with respect to the second wheel (5), and then suddenly by the device. A wristwatch (1) called a mystery, characterized in that it is possible to compensate for deviations in operation during various operations.   A wristwatch (1), referred to as a mystery, according to claim 1, characterized in that the "virtual second" wheel (10) has the same mass and diameter as the second wheel (5).   Wristwatch (1), referred to as a mystery, according to claim 2, characterized in that the "virtual second" wheel (10) is at least translucent.   Wristwatch (1) referred to as a mystery according to claim 3, characterized in that the minute hand and the hour hand are respectively mounted on the minute hollow shaft (3) and the hour hollow shaft (4).   Wristwatch (1), called mystery, according to claim 4, characterized in that the second hand is mounted on the second axis (2).   A fixed intermediate wheel (13) that is at least translucent is disposed between the second wheel (5) and the minute wheel (6), and the wheel (13) is the minute wheel (6) and the hour wheel. The wristwatch (1) referred to as a mystery according to any one of claims 1 to 5, characterized in that it supports (7) and the virtual second wheel (10).   A spacing washer (14) is arranged on said hour hollow shaft (4) between said dial (8) and said "virtual second" wheel (10). Wristwatch (1) referred to as any one of the following.   The second gear (5), the "virtual second" gear (10), the minute gear (6), the hour gear (7), and the dial (8) and the bottom (9) of the wristwatch (1) Wristwatch (1) referred to as a mystery according to any one of claims 1 to 7, characterized in that is made of sapphire.   9. A drawing according to any one of claims 1 to 8, characterized in that it comprises a drawing for producing an image, preferably at least one transparent part that rotates and / or at least one transparent part that does not rotate, preferably a moving image. Wristwatch (1) referred to as the mystery described.   A bracelet-type wristwatch called a mystery according to any one of claims 1 to 9.

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