JP2005140543A - Fake pendulum driving device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To raise the degree of freedom for setting the period of the fake pendulum, in a pendulum driving device of a clock having a fake pendulum. <P>SOLUTION: The pendulum driving circuit and the pendulum fixing part are separated discretely into an upper part and a lower part, a frame capable of inversely setting is provided, and a pair of upper/lower swing fulcrums are provided at the pendulum fixing part. On the pendulum rod for fixing the fake pendulum supported by the pendulum fixing part a pair of upper/lower bearing parts are provided corresponding to a pair of upper/lower swing fulcrum part, and the lower bearing part of upper/lower bearings is made to support the lower swinging fulcrum freely and swingingly, corresponding to the upper/lower inversion positions of the frame and the upper/lower inversion positions of the pendulum rod. Further more, a permanent magnet for giving the swinging motion to the pendulum rod is provided in corporation with the pendulum driving circuit, regardless of upper/lower inversion positions of the pendulum rod and the frame. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a decorative pendulum driving device used for a timepiece.

  Conventionally, decorative pendulums have been used in decorative watches to further enhance the decorative effect. 6 and 7 show a conventional example. The frame (pendulum drive block) 1 is provided with a lower bearing (swinging fulcrum) 2 and a pendulum drive circuit 3 that are spaced apart from each other in the vertical direction. In general, the center axis of the timepiece is positioned on a line segment connecting the lower bearing 2 and the pendulum drive circuit 3. The lower bearing 2 supports a bearing portion 4a of the tremor body 4 so as to be swingable. The tremor body 4 swings on the tremor body 4 in cooperation with a coil of the pendulum drive circuit 3. A permanent magnet 4b that gives motion is fixed. That is, the vibration member 4 is swung left and right around the lower bearing 2 (bearing portion 4a) by the electromagnetic action of the drive circuit 3 and the drive magnet 4b.

  An upper pendulum 5 and a decorative pendulum 6 can be attached to the top and bottom of the swinging body 4 of the decorative pendulum driving device. Various decoration pendulums 6 are prepared, and are used for many products by exchanging them to meet various user needs.

Further, when the acceleration of gravity is g, the period T of the pendulum is a so-called simple pendulum without the upper pendulum 5, and the distance between the ornamental pendulum fulcrum and the center of gravity of the lower pendulum (the pendulum 4 and the ornamental pendulum 6) is L _2. given that,
T [sec] = 2π (L ₂ / g) ^1/2
Given in. That is, if you want to lengthen the period it is sufficient to increase the L _2. However, the design constraints, if it can not longer L ₂ is a method to prolong the period in the vertical pendulum on the pendulum 5 provided is taken. The period T in the case of the vertical pendulum is as follows. The weight of the upper pendulum 5 is m ₁ , the distance between the fulcrum of the decorative pendulum and the center of gravity of the upper pendulum is L ₁ , and the weight of the lower pendulum is m ₂ .
T [sec] = 2π {(m ₁ L ₁ ² + m ₂ l ₂ ² ) / (m ₂ L ₂ −m ₁ L ₁ ) g} ^1/2
It becomes. In the case of the vertical pendulum, the period becomes longer as the weight m _{1 of the} upper pendulum is heavier and the center of gravity is farther from the fulcrum. In recent years, there has been an increasing demand for decorative pendulums with a long cycle in the market.

Japanese Utility Model Publication No. 58-19280 Japanese Utility Model Publication No. 58-46183

However, the conventional ones, because it contains the length of Fusao body a distance L ₂ to the lower pendulum center of gravity position and the fulcrum, the distance to the lower pendulum center of gravity position and the fulcrum was longer. Therefore the cycle long, that is if you try to swing slowly, it is necessary to increase the center-of-gravity position and the fulcrum of the distance L ₂ above the pendulum. However, there are many cases where it is difficult to lengthen the length due to design restrictions. In addition, it is possible to lengthen the cycle by increasing the weight of the upper pendulum, but since the weight of the entire decorative pendulum increases, the swing angle of the decorative pendulum decreases, and the appearance and decorativeness of the product deteriorates. A problem occurs. Thus, the conventional product has a problem that it is difficult to lengthen the period of the decorative pendulum.

  An object of the present invention is to increase the degree of freedom of setting a decoration pendulum period in a decoration pendulum driving device for a watch having a decoration pendulum.

  The ornament pendulum drive device of the present invention has a pendulum drive circuit and a pendulum mounting portion that are spaced apart vertically and can be set upside down; a pair of upper and lower swing fulcrums formed on the pendulum mounting portion A pair of upper and lower bearing portions corresponding to the pair of upper and lower swing fulcrum portions, and depending on the vertical reversal position of the frame, the upper and lower portions are reversed so that one of the upper and lower pair of bearing portions is A swinging body that is swingably supported on one of the swinging fulcrum parts; fixed to the swinging body, and in cooperation with the pendulum drive circuit regardless of the upside down position of the swinging body and the frame And a decorative pendulum coupled to the lower end of the shaking body.

  The pair of upper and lower swing fulcrum portions of the pendulum mounting portion can be fixedly provided, but either one of the pair of bearing portions can be swung freely from below according to the upside down position of the shaker body. It is possible to provide a lower bearing to be supported, and the pendulum mounting portion may be provided with a pair of upper and lower lower bearing holding portions that selectively support the lower bearing according to the upside down position of the frame.

  It is preferable that the frame can be fixed upside down on the support plate of the watch. For this purpose, it is preferable to arrange the mounting holes for the support plate of the frame at positions that are point-symmetric with respect to the needle central axis of the timepiece mechanical body.

  The position of each element is arranged so that the distance between the end face of the magnet supported by the tremor and the end face of the coil included in the ornament pendulum drive circuit does not change even if the vertical position of the frame is reversed. Is preferred.

  According to the present invention, the period of the decoration pendulum can be easily adjusted (changed) by inverting the vertical positions of the tremor body and the frame, and the degree of freedom for setting the decoration pendulum period can be increased. In addition, when the frame can be fixed to the timepiece support plate by turning it upside down, the mounting hole for the frame support plate is arranged at a point-symmetrical position with respect to the needle center of the timepiece mechanical body. The vertical position of the frame can be reversed without changing the shape of the frame. Further, the distance between the end surface of the magnet included in the tremor and the ornamental pendulum drive circuit (the end surface of the coil included in the tremor) does not change even when the vertical position of the frame and the tremor is reversed. By determining the position, it is possible to prevent a significant influence on the swing angle of the decorative pendulum and the life of the battery driving the drive circuit.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. In the following description, “upper and lower (vertical)” and “left and right (horizontal)” refer to the state in which the watch is used. 1, 2, 3, and 4 show a state in which the vertical positions of the frame (pendulum drive block) 10 and the shaking body 20 having the same configuration are reversed and the pendulum periods are different. FIG. 1 shows a state in which a decoration pendulum 31 is coupled to the lower part of the shaking body 20, FIG. 3 shows a state in which the upper pendulum 32 and the decoration pendulum 31 are joined to the top and bottom of the shaking body 20, and FIGS. The decorative pendulum 31 and the upper pendulum 32 are not drawn.

  The frame 10 includes a pendulum mounting portion 11 and a pendulum driving circuit 12 that are spaced apart in the vertical (vertical) direction. On the line segment connecting the pendulum mounting portion 11 and the pendulum drive circuit 12, a clock center axis 13 (not shown) of the watch body is located. The frame 10 is formed with mounting holes 10a, 10b, 10c, and 10d for supporting plates (not shown). These mounting holes (and corresponding support plate support holes) are arranged at point-symmetrical positions with respect to the needle center axis 13 and are fixed by the same mounting holes even when the frame 10 is turned upside down. (Set) is possible.

  The pendulum mounting portion 11 is formed with a pair of upper and lower swing fulcrum portions (lower bearing holding portions) 11X and 11Y. The swing fulcrum portions 11X and 11Y have symmetrical shapes with respect to the horizontal line at the center of both, and have insertion grooves 11a into which the lower bearing (lower bearing block) 15 can be selected and inserted. The insertion groove 11a extends in a direction parallel to the needle center axis 13 (perpendicular to the paper surface of FIGS. 1 and 3) and includes a retaining edge 11b. The shapes of the swing fulcrum portions 11X and 11Y also appear in FIG.

  The lower bearing 15 that is selectively inserted into one of the insertion grooves 11a of the swing fulcrum portions 11X and 11Y has a pair of knife edges 15a (see FIG. 5) at the front and rear ends in the insertion direction. In addition, a locking recess 15b that is engaged with the retaining edge 11b in the inserted state is formed. The upper ends of the pair of knife edges 15 a constitute a swing fulcrum located on the same line parallel to the needle center axis 13.

  The pendulum drive circuit 12 has a drive coil attached to a circuit board, and the end face of the coil faces a horizontal plane and faces the outer surface of the frame 10.

  As shown in FIG. 5, the shaking body 20 includes an surrounding portion 21 that surrounds the swing fulcrum portions 11X and 11Y, and a long arm 22 and a short arm 23 that extend in the opposite direction (vertical direction) from the surrounding portion 21. Additional pendulum support portions 22a and 23a are formed at the distal ends of the long arm 22 and the short arm 23, respectively. The additional pendulum support portions 22a and 23a have substantially the same structure, and the decoration pendulum 31 and the upper pendulum 32 can be selected and attached.

  The surrounding part 21 of the vibration body 20 is provided with a horizontal bridging edge 21a at the center in the vertical direction, and extends in a direction parallel to the insertion groove 11a at the central part of the bridging edge 21a. A bearing column 24 is provided integrally. A pair of upper and lower V-shaped groove portions 24 a corresponding to the knife edge 15 a of the lower bearing 15 are formed at the front and rear end portions of the bearing column 24. The pair of upper and lower V-shaped groove portions 24 a are a pair of upper and lower bearing portions of the vibration member 20 that are selectively swingably supported by the swing fulcrum portion 11X or 11Y of the pendulum mounting portion 11.

  Further, a permanent magnet 25 for giving a swinging motion to the shaking body 20 in cooperation with the pendulum driving circuit 12 is fixed to the long arm 22 of the shaking body 20. In the permanent magnet 25, the distance d between the end face of the permanent magnet 25 and the coil end face included in the pendulum drive circuit 12 does not change regardless of the upside down position of the frame 10 and the shaker 20. That is, the positions of the pendulum drive circuit 12 of the frame 10, the swinging fulcrum portions 11X and 11Y of the pendulum mounting portion 11, the pair of upper and lower V-shaped groove portions 24a of the swinging body 20, and the permanent magnet 25 are as follows. Regardless of the upside down position of the shaking body 20, the distance d is set to be the same.

  That is, the distance between the end face of the magnet 25 included in the trellis body 20 and the end face of the coil included in the ornament pendulum drive circuit 12 greatly affects the characteristics of the ornament pendulum, and the drive circuit that drives the ornament pendulum as the distance increases. It is known that the value of the current flowing in the battery increases and the life of the battery driving this drive circuit is shortened. On the other hand, as in the present embodiment, the distance d between the end face of the magnet 25 and the end face of the coil included in the ornament pendulum drive circuit 12 changes even when the vertical position of the frame 10 and the shaking body 20 is reversed. By not doing so, it is possible to prevent the battery life from changing even if the vertical positions of the frame 10 and the shaking body 20 are reversed.

  As shown in FIGS. 1 and 2, the present ornamental pendulum driving device having the above-described configuration is a state in which the pendulum mounting portion 11 is positioned upward and the pendulum driving circuit 12 is positioned downward to fix the frame 10 to the support plate (short cycle). 3), and conversely, as shown in FIGS. 3 and 4, the pendulum drive circuit 12 is positioned upward and the pendulum mounting portion 11 is positioned downward and the frame 10 is fixed to the support plate (long cycle state). You can choose. Since the support plate mounting holes 10a and 10b and 10c and 10d of the frame 10 are arranged in a point-symmetrical position with respect to the needle center axis 13 of the timepiece machine body, the vertical position of the frame 10 is reversed in this way. However, the position of the mounting hole does not change. For this reason, it is not necessary to change the shape of the support plate by turning the frame 10 upside down.

  1 and 2, when the short period state of FIG. 1 and FIG. 2 is selected, the vibration body 20 has a V-shaped groove portion 24 a (facing the bearing column 24 with the long arm 22 facing downward) ( The knife edge 15a of the lower bearing 15 is abutted against the bearing portion 24a) located below the pair of upper and lower bearing portions 24a. On the other hand, when the long-period state of FIGS. 3 and 4 is selected, the V-shaped groove portion 24a that similarly faces the lower side of the bearing column 24 with the short arm 23 of the vibration member 20 facing downward. The knife edge 15a of the lower bearing 15 is abutted against the bearing portion 24a positioned below the pair of upper and lower bearing portions 24a.

  The swing fulcrum portion 11X (or 11Y) located below among the swing fulcrum portions 11X and 11Y in either the short cycle state of FIG. 1 or FIG. 2 or the long cycle state of FIG. 3 or FIG. The lower bearing 15 in which the shaking body 20 is combined as described above is inserted and supported in the insertion groove 11a. In any state, the long arm 22 of the pendulum body 20 is located between the pendulum mounting portion 11 and the pendulum drive circuit 12, and the coil end face included in the pendulum drive circuit 12 of the frame 10 and the permanent magnet 25 of the pendulum body 20. The distance from the end face of is maintained at d.

  On the other hand, in the short period state of FIGS. 1 and 2, a decoration pendulum 31 is coupled to the additional pendulum support portion 22 a at the lower end of the long arm 22 of the shaking body 20, and in the state of FIGS. The decorative pendulum 31 is coupled to the additional pendulum support portion 23a at the lower end. 3 and 4, the upper pendulum 32 is further coupled to the additional pendulum support portion 22a at the upper end of the long arm 22 in order to increase the period.

  As shown in FIGS. 3 and 4, when the vertical positions of the frame 10 and the shaking body 20 are reversed, the distance between the center of gravity of the upper pendulum 32 and the swing fulcrum of the shaking body 20 becomes long. Compared with the case of FIG. 2, it is possible to lengthen the period of the decorative pendulum.

As an attachment mode of the pendulum to the swinging body 20, in addition to the modes of FIGS. 1 and 2 and the modes of FIGS. 3 and 4, the mode of attaching the upper pendulum to the mode of FIGS. 1 and 2, FIG. A mode in which the upper pendulum is removed from the mode of FIG. 4 is also conceivable. 1 and 2, in the case where the upper pendulum is attached to the upper part of the timepiece, the distance between the decorative pendulum fulcrum and the center of the upper pendulum cannot be increased. Compared to the second aspect, the period is only slightly longer. 3 and 4, the upper long arm remains, but the weight of the long arm is significantly lighter than that of the upper pendulum, so the fulcrum of the decorative pendulum and the center of gravity of the long arm The distance is short, and the cycle is short as in the case of only the short arm. Therefore, the period of the pendulum is the mode in which the upper pendulum is removed from the modes in FIGS. 3 and 4, the mode in FIGS. 1 and 2, the mode in which the top pendulum is attached to the mode in FIGS. It becomes longer in the order of the modes.

It is a front view which shows one Embodiment of the decoration pendulum drive device by this invention. It is sectional drawing which follows the II-II line | wire of FIG. It is a front view of the state which has arranged the decoration pendulum drive block of the present invention upside down. It is sectional drawing which follows the IV-IV line of FIG. It is a disassembled perspective view of the rocking | fluctuation fulcrum part of a flame | frame, and the bearing part of a shaking body. It is a front view which shows an example of the conventional ornament pendulum drive device. It is sectional drawing which follows the VII-VII line of FIG.

Explanation of symbols

10 Frame 10a 10b 10c 10d Mounting hole 11 Pendulum mounting part 11a Inserting groove 11b Retaining prevention edge 11X 11Y Oscillating fulcrum part (lower bearing holding part)
DESCRIPTION OF SYMBOLS 12 Pendulum drive circuit 13 Needle center axis | shaft 15 Lower bearing 15a Knife edge 15b Locking recessed part 20 Shaking body 21 Enclosure 21a Bridge edge 22 Long arm 23 Short arm 24 Bearing pillar 24a V-shaped groove part (bearing part)
25 Permanent magnet 31 Decorative pendulum 32 Upper pendulum d Distance between the end face of the magnet and the end face of the coil

Claims (5)

A frame having a pendulum drive circuit and a pendulum mounting portion that are spaced apart vertically and can be set upside down;
A pair of upper and lower swing fulcrum portions formed on the pendulum mounting portion;
A pair of upper and lower bearing portions corresponding to the pair of upper and lower swing fulcrum portions are provided, and the upper and lower portions are inverted according to the vertical reversal position of the frame, and either one of the pair of upper and lower bearing portions is A swinging body that is swingably supported by any one of the swing fulcrum parts of
A magnet that is fixed to the shaking body and that oscillates the shaking body in cooperation with the pendulum driving circuit regardless of the upside down position of the shaking body and the frame; and the lower end of the shaking body Decorative pendulum coupled to the section;
A decorative pendulum drive device comprising: 2. The ornamental pendulum driving device according to claim 1, wherein the pair of upper and lower swing fulcrum portions of the pendulum mounting portion can swing any one of the pair of bearing portions from below according to the upside down position of the swinging body. And a pair of upper and lower lower bearing holders that selectively supports the lower bearing according to the upside down position of the frame. 3. A decorative pendulum driving device according to claim 1, wherein the frame can be fixed upside down on a support plate of a timepiece. 4. The ornamental pendulum driving device according to claim 3, wherein the mounting hole for the support plate of the frame is disposed at a point-symmetrical position with respect to the needle central axis of the timepiece mechanical body. 5. The ornament pendulum drive device according to claim 1, wherein a distance between an end face of the magnet supported by the trellis body and an end face of a coil included in the ornament pendulum drive circuit is equal to that of the frame. A decorative pendulum drive that does not change when the vertical position is reversed.

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