JPH0453594Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a drive mechanism for a long pendulum having a long pendulum and a small swing angle.

(Prior art) Conventionally, a pendulum mechanism with a small swing angle and a long pendulum uses a large spring or weight to apply rotational force to the escape wheel, and the pallet that swings with the swing of the pendulum is connected to the escape wheel. The predetermined pendulum movement was maintained by engaging the pendulum. In recent years, a pseudo-pendulum mechanism has been known in which a drive coil and a permanent magnet are arranged to face each other and a swinging force is generated by the electromagnetic force of the drive coil.

(Problems to be solved by the invention) The structure of a pendulum mechanism having an escape wheel and pallets is complicated, and in an electromagnetic drive pendulum mechanism, due to the relationship between the angular velocity and swing angle of the permanent magnet with respect to the drive coil, the electromagnetic drive part It was not possible to arrange the drive unit near the swing axis, which made it impossible to make the drive unit more compact.

In addition, in pendulums with long pendulums such as hall clocks, if the pendulum mechanism is tilted left or right, it becomes difficult for the permanent magnet to swing evenly from side to side with respect to the drive coil, causing problems such as swinging to one side or stopping. I had a problem with putting it away.

The purpose of this invention is to make the drive part of the long pendulum mechanism more compact by arranging it closer to the swing axis, and to prevent it from swinging or stopping even when it is tilted from side to side. To provide a pendulum mechanism that is resistant to difficult tilting conditions.

(Means for Solving the Problems) In order to achieve the above object, the present invention is arranged so as to be able to overlap with the first swinging rod that swings by electromagnetic force, and also has a swing support for the first swinging rod. A second swinging rod is pivotably supported at a higher position than the shaft and has a long hole in the swinging direction, and the second swinging rod swings together with the first swinging rod.
The second swing rod has a drive pin movable within the elongated hole, and a through hole through which the drive pin passes, and is rotatably supported between the swinging shaft of the second swing rod and the elongate hole. an inclination correction lever having a hemispherical protrusion formed on a surface facing the second swinging rod; and an elastic coil provided on the support shaft of the inclination correction lever to elastically bias the inclination correction lever in the direction of the second swinging rod. , a fixed seat plate through which the support shaft of the tilt correction lever passes, and which is disposed between the elastic coil and the tilt correction lever and is engaged with an engaging portion provided on the second swing rod to prevent rotation; It is characterized by being composed of.

(Example) FIG. 1 shows a sectional view of the pendulum mechanism according to the present invention, in which a first swing rod 6 is disposed between the lower support plate 2 and the upper support plate 4.
is pivotally supported so as to be swingable, and a drive coil 8 is provided on the lower receiving plate 2. Permanent magnet 10 of the first swing rod 6
is arranged so as to overlap with the drive coil 8, and the first swing rod 6 can maintain its swinging motion by the electromagnetic force of the drive coil 8. The first swing rod 6 has a drive pin 1.
2 is provided, and the drive pin 12 passes through the elongated hole 16 of the second swing rod 14 and the through hole 20 of the inclination correction lever 18.

The second swinging rod 14 is connected to the first swinging rod 6 on the upper receiving plate 4.
It is pivotably supported at a higher position than the pivot position of. Further, the second swinging rod 14 is loosely engaged with the small diameter portion 24 of the support shaft 22, and is pressed and fixed to the stepped surface of the support shaft 22 by a coil spring 26. Normally, the second swing rod 14 and the support shaft 22 are integrated by the pressing force of the coil spring 26, but
When the pendulum mechanism itself is tilted in the front-rear direction (in the direction of the arrow shown in the figure), the second swing rod 14 is held in the vertical direction by compressing either the upper or lower side of the coil spring 26.

In the second swing rod 14, the support shaft 22 and the elongated hole 16
A column 28 is fixed between them, and a tilt correction lever 18 is rotatably supported on the column 28. The tilt correction lever 18 is connected to the second swing rod 14 via a fixed washer 32 by a coil spring 30. It is pressed and biased in the direction of . The fixed washer 32 is provided with an arm 32a whose end is bent into an L-shape, and the arm 32a engages with the engagement portion 34 of the second swing rod 14. Due to this arm 32a, as shown in FIG. 3, even if the inclination correction lever 18 slips relative to the second swing rod 14, the state of engagement between the fixed washer 32 and the coil spring 30 does not change at all. If this fixed washer 32 is not provided, the inclination correction lever 18 will rotate to the left with respect to the second swing rod 14 in FIG. A rotational force in the left direction also acts on one end. As a result, the coil spring 30 is deformed by applying a rotational force in the winding and tightening direction or the unwinding direction, thereby changing the elastic biasing force of the coil spring 30. Therefore, the slip force between the inclination correction lever 18 and the second swing rod 14 varies depending on the inclination direction of the pendulum mechanism, causing a problem that the pendulum swings to one side.

In a long pendulum with a long pendulum length, it is extremely important to manage the slip force between the inclination correction lever 18 and the second swinging rod 14, and if the slip force is too large, a lateral swing phenomenon will occur. ,Also,
If it is too small, the swinging force from the first swinging rod 6 will not be transmitted and the swinging force will stop.

In the present invention, a fixing washer 32 is provided to equalize this slip force, and as shown in FIG.
By providing the spherical protrusions 36, 38 and engaging the second swinging rod 14, the tolerance range is narrow and a small slip force can be set.

4 and 5 are plan views showing the operation of the pendulum mechanism according to the present invention. When the first swinging rod 6 swings to the right as shown in FIG. It moves integrally with the tilt correction lever 18. Since the swinging shaft of the first swinging rod 6 is located at a lower position than the swinging shaft 22 of the second swinging rod 14, the swinging angle β of the first swinging rod 6 is at the second swing angle as shown in FIG. It is larger than the swing angle γ of the swing rod 14. Further, since the second swinging rod 14 is driven by the drive pin 12, the periods of the first swinging rod 6 and the second swinging rod 14 are the same. At this time, the positional relationship between the inclination correction lever 18 and the second swing rod 14 is such that they overlap in a substantially parallel state as shown in FIG.

FIG. 3 shows a state in which the pendulum mechanism according to the present invention is tilted to the left by an angle α, and the inclination correction lever 18 and the second swing rod 14 have slipped by the angle α. As shown in FIG. 7, the second swinging rod 14 hangs vertically, and the inclination correction lever 18 is set so that the permanent magnet 10 of the first swinging rod 6 has an even left and right swinging angle with respect to the drive coil 8. It has been corrected. In this state, the second swing rod 14 swings approximately evenly left and right, and its swing angle is as shown in FIG.

(Effect of the invention) According to the invention, the first swinging rod 6 in which the long pendulum swings by the electromagnetic driving force generated by the driving coil and the permanent magnet.
Since the swinging motion follows the swinging motion of the drive pin provided in the swinging rod, the swinging drive section can be brought closer to the supporting shaft direction of the second swinging rod, and therefore the swinging drive section of the long R pendulum is smaller than the conventional one. It became more compact.

The slip force of the inclination correction lever and the second swinging rod is set by the pressing force of the coil spring via a fixed washer installed integrally with the second swinging rod, so it is not affected by the tilting of the pendulum mechanism. Therefore, the coil spring does not wind or unwind. As a result, the pressing force of the coil spring does not change depending on the state of inclination of the pendulum mechanism. Therefore, even if the pendulum mechanism is installed at an angle, the pendulum will not swing or stop at all.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the pendulum mechanism according to the present invention. FIG. 2 is a plan view showing a state in which the second swing rod and the tilt correction lever are connected when the pendulum mechanism according to the present invention is in a normal posture. FIG. 3 is a plan view showing a state in which the second pendulum and the tilt correction lever are connected when the pendulum mechanism is tilted. 4 and 5 are plan views showing the swinging states of the first and second swing rods. 6 and 7 are explanatory diagrams explaining the swing angles of the first and second swing rods. 2... Lower receiving plate, 4... Upper receiving plate, 6... First swing rod, 8... Drive coil, 10... Permanent magnet, 12
... Drive pin, 14 ... Second swing rod, 16 ... Long hole, 18 ... Inclination correction lever, 20 ... Through hole,
28...Strut, 30...Coil spring, 32
...Fixed washer.

Claims (1)

[Claims for Utility Model Registration] Oscillating drive by electromagnetic driving force generated by a drive coil and a permanent magnet that are pivotably supported between an upper receiving plate and a lower receiving plate and arranged so that they can overlap with each other. a first swinging rod arranged so as to be superimposed on the first swinging rod;
A second swinging rod is pivotably supported on an upper support plate located at a higher position than the swinging support shaft of the swinging rod, and is provided with a long hole in the swinging direction, and is integrated with the first swinging rod. It has a drive pin that is movable within the elongated hole of the second swinging rod, and a through hole through which the drive pin passes, and is rotatable between the swinging shaft of the second swinging rod and the elongated hole. an inclination correction lever that is supported by a shaft and has a hemispherical protrusion formed on a surface facing the second swinging rod; The biasing elastic coil and the support shaft of the tilt correction lever pass through,
A fixed seat plate is disposed between the elastic coil and the tilt correction lever and is prevented from rotating by engaging with the engaging part provided on the second swing rod, and when the pendulum mechanism is tilted left or right. The inclination correction lever is rotated by a predetermined rotation angle with respect to the second swinging rod to correct its position, and the swinging force from the first swinging rod can be appropriately transmitted to the second swinging rod. pendulum mechanism.