JPH06347566A - Electromagnetic pendulum clock - Google Patents

Abstract

PURPOSE:To always oscillate a pendulum in a best state even if a clock is set being inclined laterally or longitudinally or in both the lateral and longitudinal directions. CONSTITUTION:A first rotary shaft 6 is supported between opposed lower and upper base plates 1, and a second rotary shaft 11 is mounted in a lower part of a coupling plate 7 oscillatorily supported on the shaft 11. Each upper end of a coil support plate 13 and a swinging rod 20 is supported on the shaft 11, and a drive coil 25 provided in the vicinity of a lower end of the plate 13 and a permanent magnet 22 provided on a back surface of the rod 20 are disposed at a predetermined interval.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetically driven pendulum timepiece.

[0002]

2. Description of the Related Art Many watches, such as a quartz watch that do not require a pendulum, have a pseudo pendulum from the viewpoint of decorativeness.

The pseudo pendulum is generally driven by the electromagnetic action of the drive coil and the permanent magnet regardless of the operation of the timepiece mechanical body. As a timepiece adopting such an electromagnetically driven pseudo pendulum, the upper end of a swing rod body with a permanent magnet fixed to the back is swingably supported by a knife edge or a rolling bearing, and the swing rod body is stationary. There is one in which a drive coil is fixed at a position where it can face a permanent magnet fixed to a swing rod body. The drive coil is controlled by a drive circuit mounted on the circuit board, and the pendulum can reciprocate with a constant amplitude by the electromagnetic action of the drive coil and the permanent magnet.

[0004]

However, in the above structure, since the drive coil is fixed to the main plate fixed to the outer frame, when the outer frame tilts back and forth, the drive coil also tilts together with the outer frame. become. On the other hand, the swing rod body supporting the heavy swing ball inclines relative to the main plate in order to maintain the vertical state by the action of gravity. Therefore, the gap between the permanent magnet and the drive coil changes. As a result, the amplitude of the pendulum fluctuates, and the load of the pendulum becomes large because the pendulum is tilted forcibly, resulting in increased power consumption and wear of the knife edge.

Therefore, an object of the present invention is to stabilize the operation of the pendulum by automatically maintaining a constant relationship between the permanent magnet and the drive coil even when the timepiece is suspended in an inclined state. Especially.

[0006]

In order to achieve the above object, a pendulum timepiece according to the present invention is provided with a first rotary shaft attached to a main plate and a connection swingably supported by the first rotary shaft. Plate, a second rotary shaft attached to the connecting plate, a swing rod body swingably supported by the second rotary shaft, and a second rotation that can always maintain a predetermined distance from the swing rod body. A coil support plate suspended on a shaft, a drive coil attached to the coil support plate, and a permanent magnet attached to the swing rod body so as to face the drive coil when the swing rod body is in a stationary state. It has and.

[0007]

When the timepiece is tilted in either the left or right direction, the coil support plate and the swing rod body maintain the vertical state by the gravitational action of the connecting plate swingably supported by the first rotating shaft. As it moves, it swings. Therefore, the permanent magnet always maintains the relationship of swinging with respect to the drive coil within a predetermined movement range.

When the timepiece is tilted forward and backward,
Since the coil support plate and the swing rod body swingably supported by the second rotation shaft maintain the vertical state due to their respective gravity actions, the permanent magnet and the drive coil always maintain a constant distance.

When the timepiece is tilted in either the left-right direction or in the front-back direction, the connecting plate swings around the first rotating shaft, and the coil support plate and the swing rod body are Swing about the second axis of rotation to keep the drive coil in a constant relationship with the permanent magnet.

[0010]

EXAMPLE As shown in FIGS. 1 and 2, a base plate 1 and an upper base plate 2
Are provided so as to face each other at a predetermined interval via the support plate retaining columns 3 fixed to the base plate 1 and the swing retaining columns 4 and 4. Mounting holes 1a are formed in the base plate 1, and the base plate 1 is fixed to the outer frame of a timepiece (not shown) through the mounting holes. The support plate stop column 3 is horizontally arranged in the front-rear direction at the center of the upper part of the base plates 1 and 2. A through hole 5a is provided in the first rotating shaft support plate 5, and the first rotating shaft support plate 5 is penetrated through the through hole 5a at a position near the front surface (left side in FIG. 1) of the support plate stop column 3. It is supported by the support plate stop column 3. First
The rotary shaft support plate 5 is a plate-shaped member having rounded ends, and the first rotary shaft support plate 5 is provided with a small through hole 5b (see FIG. 3) at a predetermined distance from the through hole 5a. is there.

As shown in FIGS. 3 and 4, the first rotary shaft 6 is formed in a stepped rod shape having a large diameter portion 6a, a medium diameter portion 6b and a small diameter portion 6c, and the medium diameter portion 6b will be described later. A screw portion 6b1 with which the first rotating shaft nut 9 is screwed is provided. The large-diameter portion 6a is vertically attached to the base plate 1 and is parallel to the support plate stop column 3, and the end of the small-diameter portion 6c is in contact with the inner surface of the upper base plate 2. The connecting plate 7 is formed by extending each thin plate-shaped rectangular piece to form a wide cross-shaped body, and bending the base portions of the extended portions so as to be alternately at right angles.
The large-diameter portion 6a and the medium-diameter portion 6b of the first rotating shaft 6 respectively have through holes 7a1 and 7b1 provided in the upper support pieces 7a and 7b bent above the connecting plate 7, respectively. It is fitted and is swingably supported.

The upper support piece 7b is the large diameter portion 6 of the first rotary shaft 6.
The small through hole 5b located in the lower part of the first rotating shaft support plate 5 is in contact with the step at the boundary between a and the middle diameter portion 6b, and is located outside (left side in FIG. 3) of the middle diameter portion 6b. Has been done. A washer 8 is interposed on the outer side of the first rotating shaft support plate 5, and a first rotating shaft nut 9 is screwed onto the screw portion 6b1 on the outer side thereof. The first rotary shaft nut 9 is screwed in a state where the connecting plate 7 is vertical due to the action of gravity while the timepiece is supported horizontally.

A second rotary shaft 11 having a bolt shape is loosely fitted and attached to the through holes provided in the lower support plates 7c and 7d of the connecting plate 7. The first rotary shaft 6 and the second rotary shaft 11 are in a relationship that they are always positioned in the perpendicular direction via the connecting plate 7. A peller support plate 12 is swingably supported at the center of the second rotary shaft 11 sandwiched between the lower support plates 7c and 7d, and a coil support plate 13 is provided with spacers 14 on both sides thereof. It is swingably supported and suspended. Each member supported by the second rotating shaft 11 is a spacer 1
The intervals between the members are made constant by the interposition of 4 ... A washer 15 is interposed in a screw portion 11a formed on the tip of the second rotating shaft 11 on the outer side of the lower support piece 7d, and a second rotating shaft nut 16 is screwed on the outside thereof. The second rotary shaft nut 16 is mounted on the coil support plate 1 while the clock is supported horizontally.
3 and a swing rod body 20 described later are screwed in a state in which they are made vertical by the action of gravity.

As shown in FIGS. 1 and 2, the coil support plate 13
In the central portion 13a, both sides are bent at right angles to form a groove shape, and in the upper end portion 13b, both sides are extended obliquely upward to form a mounting portion to the second rotating shaft 11. At the lower end, both sides are removed to form a flat plate, which constitutes a coil mounting portion 13c described later.

As shown in FIGS. 2 and 4, the swing rod propeller support plate 12 has an upper end portion of the swing rod propeller 17 fixed thereto, and the lower end portion of the swing rod propeller has a propeller support plate 18 and an auxiliary member. A swing rod body 20 is attached through the plates 19 and 19. That is, the swing rod body 20 includes the auxiliary plate 19, the propeller support plate 18,
The second rotary shaft 1 via the swing rod propeller 17 and the propeller support plate 12.
1 is swingably supported. The swing rod peller 17 is made of a strong band-shaped body and is deformable following the swing of the swing rod while the swing rod body 20 is suspended.

As shown in FIGS. 1 and 2, the swing rod body 20 is
The width is approximately equal to the front width of the coil support plate 13 and is made of a strip having a length slightly longer than that of the front side. It is bent at a right angle in the position of, and the wide surface is directed to the front.

A yoke 21 and a permanent magnet 22 are attached to the rear surface (right side in FIG. 1) near the lower end of the swing rod body 20. The permanent magnet 22 is provided so as to face a drive coil 25, which will be described later, when the swing rod body 20 is in a stationary state.

The coil mounting portion 13c provided in the vicinity of the lower end portion of the coil support plate 13 is formed in a horizontally long rectangular shape, and the front surface of the coil mounting portion 13c is provided with board mounting columns 23 standing upright at four corners.
The circuit board 24 is fixed via. Circuit board 2
A drive coil 25 is provided on the front surface of the circuit board 4, and a circuit element (not shown) provided on the circuit board 24 for the drive coil.
A voltage controlled by can be applied. Four balancer mounting columns 26 are erected from the front surface of the coil support plate 13 to the outside of the circuit board 24, and a balancer 27 made of a metal plate is mounted on the tip end of the pillars. The connecting plate 7 is swingably supported by the first rotary shaft 6, and the coil support plate 13 and the swing rod body 20 are supported by the second rotary shaft 1.
Since it is swingably supported by 1, the coil attachment portion 13c of the coil support plate 13 and the swing rod body 20 to which the swing ball 28 described later is locked by the gravity action maintain the vertical state. Then, the permanent magnet 2 of the swing rod body 20
2 and the drive coil 25 of the coil support plate can always maintain a predetermined distance.

A swing ball 28 is hooked in a hooking hole 20a provided at the lower end of the swing rod body 20 via a hooking piece 29a of a ball rod 29. The swing rod body 20 has its swing angle regulated by two swing stop columns 4 and 4 attached to the lower ends of the base plates 1 and 2 at a predetermined interval.

Next, the operation will be described. As shown in FIGS. 1 and 2, when the timepiece is installed in a vertical state without inclination, the permanent magnet 22 and the drive coil 25 face each other at a constant interval, and if the drive coil is energized, electromagnetic action is caused. The swing rod body 20 reciprocates.

Next, as shown in FIGS. 5 and 6, when the timepiece is installed in a state of being inclined in the left-right direction or the front-back direction,
Before installing at the designated place, first the rotating shaft nut 9
And, the second rotary shaft nut 16 is loosened.

For example, when the timepiece is installed in a designated place and the timepiece is tilted in the left-right direction as shown in FIG. 5 (upward to the right in FIG. 5), the first rotary shaft nut 9 is Since it is loosened, the connecting plate 7 slides around the first rotating shaft 6 in an attempt to maintain the vertical state by the gravity action of the coil supporting plate 13 and the swing rod body 20. Therefore, when the drive coil 25 and the permanent magnet 22 are stationary, the opposing positions of the drive coil 25 and the permanent magnet 22 are the same as when both base plates 1 and 2 are horizontal, and the drive coil 25 and the permanent magnet 22 are in a horizontal position. The magnet 22 can always face the magnet 22 at a constant interval regardless of the inclination of the timepiece. Next, the first rotating shaft nut 9 is screwed again with the drive coil 25 and the permanent magnet 22 thus stationary. After that, when the drive coil 25 is energized, the swing rod body 20 is electromagnetically operated.
Makes a reciprocating motion.

However, when the timepiece is installed in a state of being extremely inclined in the left-right direction, the coil support plate 13 or the swing rod body 20 comes into contact with the steady rest column 4, and normal swinging movement is hindered. , It is necessary to re-install the clock so that it is close to the vertical state.

Next, as shown in FIG. 6, when the timepiece is tilted in the front-rear direction, the connecting plate 7 is tilted, but the coil support plate 13 and the swing rod prop 17 swing. Since they are freely attached to the second rotary shaft,
Each of them moves so as to be in a vertical state by the action of gravity. Therefore, the coil support plate 13 and the swing rod body 20 are always opposed to each other while maintaining a predetermined interval. Therefore, when the swing rod body 20 is in a stationary state, the permanent magnet 22 and the drive coil 25 can always face each other at a constant interval. Next, in this way, the drive coil 25 and the permanent magnet 2 are
The second rotary shaft nut 16 is screwed again in the state where 2 and 6 are stationary. After that, when the drive coil 25 is energized, the swing rod body 20 reciprocates due to electromagnetic action.

Similarly, when the timepiece is installed so as to be tilted in both the left-right direction and the front-rear direction, it shifts to both of the above-mentioned states at the same time, and normal swing motion of the pendulum can be continued. To do. As a result, it is possible to prevent the swing width of the pendulum from being varied and an excessive force from being applied to the contact portion even when the timepiece is installed in a state of being inclined in the left-right and front-rear directions. In the present invention, the swing rod body is supported on the second rotating shaft via the swing rod propeller, but this may be replaced with a knife edge or a rolling bearing.

[0026]

According to the present invention, since the connecting plate supporting the swing rod body and the coil supporting plate is swingably supported on the first rotating shaft, when the timepiece is installed in a state of being tilted left and right. In addition, the swing rod body and the coil support plate are always kept in the vertical state, the drive coil for driving the pendulum and the permanent magnet are maintained in the best relationship, and the amplitude of the pendulum can be kept constant. Along with this, the swing rod body is swingably supported by the second rotating shaft, and the coil support plate is hung so as to be able to maintain a predetermined distance from the swing rod body at all times. Even in such a case, the swing rod body and the coil support plate swing around the second rotation axis to maintain a state in which they can face each other at a predetermined interval, and the operation of the pendulum is stabilized. Therefore, there is an effect that the waste of electric power can be reduced.

[Brief description of drawings]

FIG. 1 is a side view showing a main part of an embodiment of the present invention and showing a state in which a timepiece is installed in a vertical state.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged cross-sectional view showing a supported state of a first rotating shaft and a connecting plate.

FIG. 4 is an enlarged cross-sectional view showing a state in which a swing rod body and a coil support plate are supported by a second rotating shaft.

FIG. 5 is a front view of an essential part showing a state in which the timepiece is installed so as to be inclined in the left-right direction.

FIG. 6 is a side view of an essential part showing a state in which the timepiece is installed while being inclined in the front-rear direction.

[Explanation of symbols]

 1, 2 Main plate 6 1st rotating shaft 7 Connecting plate 11 2nd rotating shaft 13 Coil support plate 20 Swing rod body 22 Permanent magnet 25 Drive coil

Claims (1)

[Claims] 1. A first rotating shaft attached to a main plate, a connecting plate swingably supported by the first rotating shaft, a second rotating shaft attached to the connecting plate, and the second rotating shaft. A swing rod body swingably supported by a shaft, a coil support plate suspended from the second rotary shaft so as to be able to maintain a predetermined distance from the swing rod body, and attached to the coil support plate. An electromagnetically driven pendulum timepiece comprising a drive coil and a permanent magnet attached to the swing rod body so as to face the drive coil when the swing rod body is in a stationary state.