JP3472437B2 - Pendulum support structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pendulum support structure for swingably supporting a pendulum used in wall clocks, wall clocks and the like.

[0002]

2. Description of the Related Art A conventional pendulum supporting structure has a structure shown in FIGS. That is, the swing ball 5 is attached to the lower end of the swing rod 3 of the pendulum 1, and the support shaft 7 penetrating the swing rod 3 in the front-rear direction is attached to the upper end of the swing rod 3. Then, by inserting the cylindrical end portions 7a and 7b of the support shaft 7 into the support holes 9a and 9b provided in the support tool 9, respectively, the pendulum 1 is swingably supported.

The pendulum 1 supported as described above is supported by the inner peripheral surfaces of the support holes 9a, 9b having a diameter considerably larger than the shaft diameters of the end portions 7a, 7b so that the support shaft 7 can roll. The end portions 7a and 7b roll on the inner peripheral surface to swing.

[0004]

In the above-mentioned conventional pendulum support structure, when the support 9 is tilted in the front-rear direction due to the inclination of the timepiece or the like, the pendulum 1 tends to fall in the vertical direction as it tries to face the vertical direction. Therefore, the end 7 of the support shaft 7
The support shaft 7 is inclined with respect to the front-rear direction, with one of the contact points between the a and 7b and the support holes 9a and 9b as a base point, and the end portions 7a and 7b.
Either of them floats up or tries to float up from the inner peripheral surface of the support holes 9a, 9b. In this state, if the pendulum 1 is swung left and right in FIG. 7, the pendulum 1 normally supported by two front and rear fulcrums is supported by only one fulcrum, so the pendulum 1 swings left and right. There is a problem that not only the pendulum 1 moves but also the pendulum 1 rotates irregularly in the direction in which the pendulum 3 is twisted.

When the swing rod 3 of the pendulum 1 is long, the pendulum 1 may come into contact with the exterior and stop due to the tilt or tilt of the pendulum 1 as described above. The thickness was decided. Therefore, there is also a problem that the exterior becomes thick.

Further, the end portion 7a of the support shaft 7 as described above,
In order to prevent the 7b from floating, the swing rod 3 is provided above the support shaft 7.
Is extended, and a balancer is attached thereto, and the center of gravity of the pendulum 1 is moved by adjusting the balancer so that the end portions 7a and 7b of the support shaft 7 are hard to lift, but due to its structure, There was a problem that the design was restricted in the height direction.

The present invention has been made in view of the above problems of the conventional example, and prevents the pendulum from tilting in the front-rear direction, stabilizes the swing of the pendulum, and makes it possible to reduce the thickness of the exterior. Is provided.

[0008]

Means for Solving the Problems] pendulum support structure of the present invention, the pendulum support structure for supporting the pendulum swingably by receiving both end portions of the support shaft in the inner circumferential surface of the support hole, the first support A first support plate having holes and a second support
The second support plate having holes is overlapped, and the first and second
The inner peripheral surface of one of the two support holes receives the end of the support shaft.
A receiving surface is formed, and the inner circumference of the other of the first and second support holes
Surface to limit the lifting of the end of the support shaft.
It is formed .

Further, the receiving member in the pendulum supporting structure is
Both the surface and the regulation surface consist of curved or flat surfaces, or
One of them has a curved surface or a flat surface.

Further, the pendulum support structure of the present invention comprises a support shaft.
Can be swung freely by receiving both ends of the
In a pendulum support structure for supporting a pendulum, the support hole
A space is provided inside which both ends of the support shaft can roll.
And restrict the lifting of the end of the support shaft.
Fulcrum float regulation means is provided, and the fulcrum float regulation means
Between the both ends of the support shaft due to rolling of the support shaft
Be sure to provide a clearance that allows the pendulum to swing.
The fulcrum floating restriction means covers the upper part of the support hole.
When the support shaft rises, it receives this support shaft and
From a regulation surface that enables the swinging of the pendulum due to rolling.
The support surface of the support hole is a curved surface, and the regulating surface is a curved surface having a smaller radius of curvature than the support surface of the support hole.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The pendulum in the pendulum support structure of the present invention is swingably supported by the end portion of its support shaft being received by the receiving surface of the support hole. A space in which both ends of the support shaft can roll is provided in the support hole, and a fulcrum floating regulation means is provided. The fulcrum floating restriction means is composed of a restriction surface that covers the upper part of the support hole, and by receiving the end of the support shaft lifted by this restriction surface, the support shaft is restricted from floating and the support shaft can roll. Support in. Therefore, even if one end of the support shaft floats, the end of the support shaft is kept to a minimum and is supported in a rollable state by the restricting surface, so that the pendulum is always supported in front and rear of the end. It is supported by the points and swings in a stable state.

[0012]

FIG. 1 is a sectional view showing a pendulum including a pendulum support structure and its peripheral mechanism according to an embodiment of the present invention.
FIG. 2 is an enlarged view of the main part, and FIG. 3 is a view on arrow A of FIG.
In FIG. 1, reference numeral 2 is an exterior of a timepiece, and a support portion 6 of a pendulum 4 and a driving coil 8 are attached to the inner surface of the exterior.

The pendulum 4 is composed of a swing rod 10, a swing ball 12 mounted near the lower end of the swing rod 10, and a support shaft 14 mounted at the upper end so as to penetrate in the front-rear direction. A magnet 16 is arranged near the center of the swing rod 10 so as to face the coil 8.
Further, the support shaft 14 is, as shown in FIG.
A shaft body 14a press-fitted into a hole 10a provided in the base, and end portions 14b having a small diameter cylindrical shape provided at both ends thereof,
4c.

Further, in the present embodiment, the support portion 6 is
It is composed of a pair of support plates 18 and 20 facing each other. The support plates 18 and 20 are the first and second support plates 18a and 18b or the first and second support plates 20a and 20a, respectively.
It is formed by overlapping 20b. As shown in FIG. 3, the first support plates 18a and 20a are provided with circular first support holes 18c and 20c, and the second support plates 18b and 20b have the same circular shape. Second support holes 18d and 20d are provided. The first and second support plates 18a, 18b, 20a, 20b
Is the first and second support holes 18c, 18d, 20c, 2
The centers of 0d are positioned so that they are vertically displaced, and are overlapped. Therefore, the end portion 14 of the support shaft 14
b and 14c are inserted into a rugby ball-shaped space S surrounded by the arcs of the first support holes 18c and 20c and the second support holes 18d and 20d, respectively.
Receiving surfaces 18e, 20 composed of inner peripheral surfaces below 8c, 20c
supported by e.

Space S in the support plates 18 and 20
The ends 14b and 14c of the support shaft 14 are the first support holes 1
It is set to have an area capable of rolling on the receiving surfaces 18e, 20e of the 8c, 20c.

On the other hand, the second support plates 18b, 20b
The support holes 18d, 20d of the first support plates 18a, 20a are formed so that the restriction surfaces 18f, 20f formed of the inner peripheral surface above the first support holes 18d, 20d act as fulcrum floating restriction means. It is arranged so as to cover the upper part.
Then, the regulation surfaces 18f and 20f and the first support hole 1
A minimum clearance C by which the end portions 14b, 14c can roll is provided between the end portions 14b, 14c of the support shaft 14 supported by the receiving surfaces 18e, 20e of the 8c, 20c. ing.

First and second support plates 1 in this embodiment
Support plate 1 in which 8a, 18b, 20a, 20b are polymerized
8 and 20 are integrated by a plurality of columns 22 provided therebetween with a constant interval, and the fixed portion 2 of the exterior 2 is further integrated.
It is fixed at 4.

In the pendulum support structure having the above structure, the magnet 16 is oscillated by the magnetic force of the coil 8 being applied thereto. Normally, the support shaft 14 has the end portion 1 thereof.
4b and 14c are receiving surfaces 18 of the first support holes 18c and 20c.
By rolling left and right on e and 20e in FIG. 3, the swing rod 10 swings left and right.

Here, for example, when the upper portion of the outer casing 2 is installed in a state of being tilted rearward (rightward in the drawing) in FIG. 1, the support plates 18 and 20 fixed to the outer casing 2 are also installed in FIG.
Also, in FIG. 2, the upper part of the structure is inclined so as to be tilted to the right. At this time, the pendulum 4 tries to face the vertical direction,
The left end 14c of the support shaft 14 in the drawing and the first support hole 20
Since an attempt is made to rotate counterclockwise in FIG. 2 with the contact point of c with the receiving surface 20e as a fulcrum, the end portion 14b on the right side in FIG.
Rises from the receiving surface 18e of the first support hole 18c. The end portion 14b of the support shaft 14 that has been lifted is provided with the second support hole 1
It abuts against the regulation surface 18f of 8d and is prevented from rising without rising above the clearance C. In this way, the one end 14 c of the support shaft 14 is connected to the first support hole 20.
The support shaft 14 is supported at two points in a state where the support shaft 14 is in contact with the receiving surface 20e of c and the other end 14b is in contact with the restricting surface 18f of the second support hole 18d. Moreover, the regulation surface 18f with which the end portion 14b is in contact with is the first support hole 18
Since it has the same curved surface as the receiving surface 18e of c, the support shaft 14 can roll. Therefore, even if the pendulum 4 tilts, the tilt is minimized, and further, the support shaft 14 is supported at two points and in a rollable state as in the normal support state. . As a result, the swing of the pendulum 4 is performed in the same manner as usual.

FIG. 4 shows the radius of curvature of the restriction surfaces 18f and 20f of the second support holes 18d and 20d as the first support holes 18c and 2f.
An example of a change when the size is made smaller than the receiving surfaces 18e and 20e of 0c is shown. The second support holes 18d and 20 shown in FIG.
The radius of d is smaller than that of the first support holes 18c and 20c, and as a result, the end 14b of the support shaft 14,
Than the radius of curvature of the receiving surfaces 18e and 20e that receive 14c,
Control surfaces 18f and 20f that prevent the end portions 14b and 14c from floating
The radius of curvature of becomes smaller. In this way, the regulation surface 18
If the curvature radii of f and 20f are set small, the support shaft 14
It is possible to narrow the moving distance of the end portions 14b and 14c of FIG. Therefore, the ends 14b, 14
It is possible to minimize the rooster that moves left and right in the figure when one of the c floats. Even in this case, a sufficient space is secured for the end portions 14b and 14c to roll, and the end portions 14b and 14c that roll to the left and right are also secured.
Even if the contact surfaces 18f, 20f contact
Since f and 20f are formed by curved surfaces, the contacted end portions 14b and 14c do not slide and do not hinder the swing of the pendulum 4.

In the above embodiment, the first and second
The support plate 18a, 18b, 20a, 20b is provided with the first and second support holes 18c, 18d, 20c, 20d, respectively, and the space S for inserting the end portions 14b, 14c of the support shaft 14 by stacking these holes. However, it is not always necessary to form the space S by stacking two support plates. For example, the space S may be formed by molding. However, by overlapping the two support plates, it is possible to easily and accurately form the receiving surface and the restricting surface.
One of the support plates is replaced with the other, and only one of the first and second support holes is changed so that the clearance C between the end portions 14b and 14c of the support shaft 14 and the restriction surfaces 18f and 20f is reduced. It is possible to adjust.

In the above embodiment, the receiving surfaces 18e, 20e of the first supporting holes 18c, 20c and the restricting surfaces 18f, 20f of the second supporting holes 18d, 20d are both curved surfaces. As shown in FIG. 6, even if one or both of them is flat, it is possible to prevent the end portions 14b and 14c from floating.

[0023]

According to the present invention, due to the inclination of the timepiece and the like,
Even when the pendulum is tilted back and forth with respect to its support portion, the lifting of the pendulum support shaft is restricted by a restriction surface as a fulcrum floating restriction means provided in the support hole and is always supported at two points. Therefore, it is possible to prevent the pendulum from falling in the vertical direction and stabilize the swing.

Further, since it is possible to prevent the pendulum from inclining with respect to its supporting portion, it is not necessary to determine the exterior thickness in consideration of the inclination of the pendulum, and the exterior thickness can be made thinner.

Furthermore, by suppressing the inclination of the pendulum,
The magnet provided on the pendulum and the coil provided on the exterior side do not come into contact with each other or are not too far apart from each other, and the operation can be stabilized by always maintaining a constant interval.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a pendulum including a pendulum support structure according to an embodiment of the present invention and a peripheral mechanism thereof.

FIG. 2 is an enlarged view of a main part of FIG.

3 is a view on arrow A in FIG. 2. FIG.

FIG. 4 is an explanatory diagram showing a modification example in which the radius of curvature of the restriction surface of the second support hole shown in FIG. 3 and the like is smaller than that of the receiving surface of the first support hole.

FIG. 5 is an explanatory diagram showing an example of changing the shapes of the receiving surface and the regulation surface shown in FIG. 3 and the like.

FIG. 6 is an explanatory diagram showing another modification of the shapes of the receiving surface and the restriction surface shown in FIG. 3 and the like.

FIG. 7 is a front view showing a conventional pendulum support structure.

8 is a side view of the pendulum support structure shown in FIG. 7. FIG.

[Explanation of symbols]

2 exterior 4 pendulum 10 swing rod 14 Support shaft 14b, 14c ends 18, 20 Support plate 18a, 20a First support plate 18b, 20b Second support plate 18c, 20c First support hole 18d, 20d Second support hole 18e, 20e Receiving surface 18f, 20f Regulation side

Claims (3)

(57) [Claims] 1. A pendulum support structure for swingably supporting a pendulum by receiving both ends of a support shaft by an inner peripheral surface of the support hole, a first support plate having a first support hole, and a second support plate. Support holes for
The second support plate having the first and second support plates are overlapped with each other, and
A receiving surface that receives the end of the support shaft at one inner peripheral surface of the support hole
On the other inner peripheral surface of the first and second support holes.
Forming a regulation surface that regulates the lifting of the end of the support shaft
A pendulum support structure characterized by: 2. The receiving surface and the regulating surface are both curved or
Consists of planes, or one of them consists of curved surfaces or planes.
Pendulum indication structure according to claim 1, wherein the that. 3. The receiving surface of the support hole receives both ends of the support shaft.
Pendulum support structure that swings freely to support the pendulum
In the support hole, both ends of the support shaft are rollable in the support hole.
And the floating of the end of the support shaft is
A fulcrum floating regulation means for regulating the fulcrum
The support shaft rolls between the regulation means and both ends of the support shaft.
Clearance that allows the swinging of the pendulum
And the fulcrum floating restriction means covers the upper portion of the support hole,
When the support shaft rises, it receives the support shaft and rolls.
The support surface of the support hole is a curved surface, and the restriction surface is a curved surface having a smaller radius of curvature than the support surface of the support hole. that vibration Riko support structure.