JP2904474B2 - Clock indication mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm clock which emits an alarm sound at a set time, and more particularly, to an alarm mechanism for generating an alarm signal for generating an alarm sound, wherein an indicator hand is moved in both forward and reverse directions. The present invention relates to a guide mechanism capable of rotating.

[0002]

2. Description of the Related Art Conventionally, a guide mechanism for setting the sounding time of an alarm sound has used a guide cam which rotates once in 12 hours in accordance with the rotation of an hour hand wheel, and a guide contact piece is provided in a notch of the guide cam. When falling, the reference contact is closed and a reference signal is output. In the conventional general guide mechanism, the direction of rotation of the guide is limited to one direction due to the notch shape of the guide cam, and when the guide hand is adjusted and set at the alarm time, the rotation direction of the guide needle is limited to one direction. There were many things that could be done.

However, if the reference hand rotates in one direction as described above, it may be necessary to rotate the reference hand nearly one turn when setting the alarm time.
A guide mechanism is used in which the guide hand can be rotated forward and reverse and the alarm time can be set by setting the amount of rotation of the guide hand to 180 degrees or less when setting the alarm time.

In order to enable the guide needle to rotate in both the forward and reverse directions and to set the position where the guide contact falls into the notch of the guide cam to be exactly a fixed position, a structure generally having a complicated structure is used. Many, but with a relatively simple structure that allows the standard needle to rotate forward and backward, and closes the standard contact at the correct set time, as shown in Fig. 9, and is integrated with the standard shaft 11 that attaches the standard needle to the tip. Guide wheel 21 and hour hand wheel 23
(See, for example, Japanese Utility Model Publication No. 61-42145).

[0005] In this guide mechanism, as shown in FIG.
When the cam pawl 41 of the hour hand wheel 23 is positioned in the cam groove 51 of the reference wheel 21, the reference wheel 21 is moved in the direction of the hour wheel 23 by the elastic body 63 shown in FIG. The movable contact 61 contacts the fixed contact 65, and if the hour wheel 23 rotates in the forward direction, the indicator wheel 21 is turned by the inclined portion 45 of the cam claw 41 and the forward inclined portion 53 of the cam groove 51. The movable contact 61 and the fixed contact 65 are separated from each other.

FIG. 9 shows a four-axis movement having a minute hand shaft 15 and a second hand shaft 17 which are coaxial with the hour hand shaft 13. A movement between the second hand wheel 27 and the minute hand wheel 25 is shown in FIG. A third wheel (not shown) is arranged, and a minute wheel is arranged between the minute hand wheel 25 and the hour hand wheel 23. In this guide mechanism, when setting the reference hand by rotating the reference wheel 21 in the reverse direction of the hour hand wheel 23 by the reference wheel 29 attached to the reference knob shaft 19, the cam groove 51 provided in the reference wheel 21 is provided. The cam pawl 41 of the hour wheel 23 moves relatively in the forward direction with respect to the cam wheel 41. The cam pawl 41 is displaced from the cam groove 51 by the front inclined portion 53 of the cam groove 51 and the inclined portion 45 of the cam pawl 41. The reference wheel 21 is rotated so as to be pushed out, and the reference hand is rotatable so that the rotation is not restricted by the influence of the cam mechanism.

When the reference hand is rotated in the same direction as the normal rotation of the hour hand, the cam groove is formed in the vertical wall 43 of the cam pawl 41.
The rear inclined portion 55 of 51 is in contact with the reference vehicle 21 by the rear inclined portion 55.
Rotates in the normal rotation direction of the hour wheel 23 so as to be separated from the hour wheel 23 against the force of the elastic body 63. At this time, the guide set plate 31 inserted between the hour hand wheel 23 and the reference wheel 21 positions the cam pawl 41 in the through hole 33 of the guide set plate 31, and the hour hand wheel
It is stopped integrally with 23 (rotating at a very low speed).

[0008] In this manner, the cam pawl 41 is moved to the rear inclined portion 55.
When it comes off from the cam groove 51, as shown in FIG.
The positioning pin 35 of the guide set plate 31
In contact with the rear end, the reference set plate 31 rotates integrally with the reference wheel 21 to position the cam pawl 41 of the hour hand wheel 23 on the surface of the reference set plate 31, while rotating the reference set plate 31 together with the reference wheel 21. The alarm time can be set to a predetermined time by a guide hand.

When the hour wheel 23 sequentially rotates and approaches the alarm set time, as shown in FIG.
When the concave portion 47 of 41 engages with the convex portion 37 of the reference set plate 31, rotates the reference set plate 31 together with the hour wheel 23, and when the positioning pin 35 contacts the front end of the play hole 59, the reference set plate 31 Guide car
When the hour wheel 23 is further stopped integrally with the hour wheel 21 and the hour wheel 23 further rotates, the cam pawl 41 is inserted into the through hole of the guide set plate 31 as shown in FIG.
The guide wheel 21 approaches the hour hand wheel 23 by dropping into the cam groove 51 through 33, and when the vertical wall portion 43 of the cam pawl 41 reaches the position of the through hole 33 of the guide set plate 31, The setting plate 31 and the reference wheel 21 are rapidly approached in the direction of the hour hand wheel 23 by the elastic body 63, and the movable contact 61 formed at the end of the elastic body 63 is brought into contact with the fixed contact 65 to close the reference contact. is there.

[0010]

As described above, the guide mechanism provided with inclined portions on both the front and rear sides of the cam groove using the guide set plate which rotates in a predetermined range while being integrated with the guide wheel is a guide needle. Can be rotated forward and reverse, and the reference contact can be accurately closed at a predetermined relative position between the reference wheel and the hour wheel.

However, the guide wheel and the guide set plate are formed with high precision by adjusting the distance between the through hole provided in the guide set plate and the positioning pin to the distance to the front wall and the rear wall of the cam groove and the play hole. In addition, if the protrusion provided on the guide set plate is small, the guide set plate may not be able to be moved so that the through hole of the guide set plate is aligned with the cam groove of the guide wheel. When it is large, when the cam hook of the hour wheel contacts the convex part, it gives a large resistance to the rotation of the hour wheel, and the rotation of the hour wheel is hindered. There was a drawback that the guide mechanism including the adjustment of the force could not be simply and easily manufactured.

[0012]

According to the present invention, an indicator wheel and an hour wheel are arranged coaxially, and the indicator wheel is pressed in the direction of the hour wheel by an elastic body, and a projection provided on the indicator wheel has an hour hand. When the guide wheel moves to the hour hand wheel side when fitted into the cam hole that moves in accordance with the rotation of the car, the guide mechanism moves to the hour hand wheel side and closes the reference contact. The guide cam plate is rotatable coaxially with the hour wheel,
In addition, a cam hole having a vertical wall at the end of the hour wheel in the normal rotation direction is provided as a cam hole capable of accommodating the guide projection provided on the side surface of the reference wheel, and a vertical wall is formed on the reference projection in a direction normal to the hour wheel rotation. In addition, an inclined portion is provided in the hour wheel reverse rotation direction, and further, the guide cam plate is provided with a guide storage hole which is continuous with the cam hole in the hour wheel forward rotation direction of the cam hole and is narrower than the cam hole. On the side surface of the hour wheel, there is provided a guide projection housed in the guide storage hole, and the guide projection has a vertical wall having a height equal to or greater than the thickness of the reference cam plate in the hour wheel normal rotation direction, and An inclined portion is provided in the reverse direction of the hour wheel and a rising portion perpendicular to the end portion is provided, and the rising portion has a structure in which the rising portion does not contact the reference projection.

[0013]

According to the present invention, since the reference cam plate is provided between the hour hand wheel and the reference wheel, and the guide cam plate is provided with a guide storage hole for receiving a guide projection provided on a side surface of the hour hand wheel, the reference cam is provided. The plate can be rotated integrally with the hour wheel in the forward direction of the hour wheel. Since the guide cam plate is provided with a cam hole for accommodating the guide projection provided on the side of the reference wheel, the reference cam plate which rotates integrally with the hour hand wheel is located at a predetermined position with respect to the reference wheel. At this time, the reference projection can be fitted into the cam hole to close the reference contact.

When the reference cam plate and the hour wheel continue to rotate in the forward direction, the guide projection is pushed out of the cam hole by the inclined portion because the guide projection has an inclined portion in the hour wheel reverse direction. Similarly, when the reference wheel is rotated in the direction opposite to the rotation direction of the hour wheel, the guide protrusion can be removed from the cam hole and can be freely rotated in the opposite direction.

Further, when the reference wheel is rotated in the normal direction of rotation of the hour wheel, when the vertical wall of the reference protrusion comes into contact with the vertical wall of the cam hole provided in the reference cam plate, it is continuously connected to the cam hole. A guide storage hole is provided in the forward rotation direction, a guide protrusion is stored in this guide storage hole, and an inclined portion is also provided in the guide protrusion, so that the guide protrusion is rotated by pressing the guide cam plate to guide the guide protrusion. The guide hole is exposed from the storage hole to the cam hole, and the guide protrusion can be retracted and removed from the cam hole by the inclined portion of the guide protrusion.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, an embodiment of a guide mechanism according to the present invention has a guide shaft 11, an hour hand shaft 13 and a minute hand shaft 15 arranged coaxially, and the minute hand shaft 15 is controlled by a minute hand wheel 25 for 60 minutes. The hour hand shaft 13 is rotated once in 12 hours by the hour wheel 23, and the indicator wheel 21 is urged in the direction of the hour wheel 23 by the elastic body 63, so that the hour hand wheel 23 and the indicator wheel 21 move relative to each other. When the position reaches a predetermined position, the reference wheel 21 is moved in the direction of the hour wheel 23 by the elastic body 63 to close the reference contact so that the movable contact 61 comes into contact with the fixed contact 65. A guide cam plate 71 is provided between the reference wheel 23 and the reference wheel 21.

FIG. 1 shows a four-hand coaxial structure in which a second hand shaft 17 is provided coaxially with the hour hand shaft 13 and the minute hand shaft 15 and the second hand shaft 27 is rotated once by the second hand wheel 27 in 60 seconds. Numeral 21 designates a rotation adjustment by a reference wheel 29 attached to a reference knob shaft 19. As shown in FIG. 2, the reference cam plate 71 is formed in a disk shape and has an appropriate thickness, and is rotated with respect to the hour hand wheel 23 and the reference wheel 21 while being coaxial with the hour hand wheel 23 and the reference wheel 21. As shown in FIGS. 2 and 3, it has a circular arc-shaped cam hole 73 which is a vertical wall whose periphery is perpendicular to the surface of the reference cam plate 71. On one side in the circumferential direction of 73, there is provided a guide storage hole 75 continuous with the cam hole 73 and having a smaller width than the cam hole 73.

The guide storage hole 75 is provided on the forward rotation direction side of the hour wheel 23 with respect to the cam hole 73, and the length of the guide storage hole 75 and the length of the cam hole 73 are substantially the same. .
As shown in FIGS. 4 and 5, reference projections which can be housed in the cam holes 73 of the reference cam plate 71 are provided on the side surface of the reference wheel 21.
The reference projection 81 has a height lower than the thickness of the reference cam plate 71.
A vertical wall 83 substantially perpendicular to the side surface of the hour wheel 21 is provided at the forward rotation direction end of the hour wheel 23, and has a flat portion 87 at the tip,
This is a shape having an inclined portion 85 on the reverse rotation side of the hour wheel 23.

Further, on the side surface of the hour hand wheel 23, a guide storage hole 75 is provided.
The guide projection 91 is set at a height equal to the thickness of the reference cam plate 71, and a vertical wall 93 perpendicular to the side surface of the hour wheel 23 is fixed to the center of the hour wheel 23. At the end on the turning direction side, on the reverse direction side of the hour wheel 23, there is an inclined portion 95, and the forward direction end is a vertical rising portion 97, and the height of the rising portion 97 is As shown in FIG.
Height that does not touch the surface.

The height of the vertical wall 93 of the guide projection 91 may be higher than the thickness of the reference cam plate 71 and the tip may be slightly protruded. Things. Thus, the reference wheel 21 and the hour hand wheel 23
The guide cam plate 71 is provided between
The guide projection 81 that can be stored in the guide wheel 21 is provided on the side surface of the reference wheel 21, and the guide projection 91 that is stored in the guide storage hole 75 continuous with the cam hole 73 is provided on the side surface of the hour hand wheel 23, and the guide projection 81 and the guide are provided. Since the vertical walls 83, 93 and the inclined portions 85, 95 are formed on the projection 91, as shown in FIG. 6, when the hour wheel 23 is rotating in the forward direction, the vertical wall of the guide projection 91 is formed. The guide cam plate 71 can be rotated together with the hour hand wheel 23 by pressing the wall surface of the guide storage hole 75 by 93, and the cam hole 73 of the guide cam plate 71 is
When the guide projection 81 is rotated to the position of the guide projection 81, the guide projection 81 is fitted into the cam hole 73 so that the guide projection 81 is housed in the cam hole 73, as shown in FIG. The elastic body 63 is moved toward the hour wheel 23, and the movable contact 61 is fixed to the fixed contact 65.
To close the standard contact.

At this time, the periphery of the cam hole 73 is a vertical wall, and the reference projection 81 is also a vertical wall end of the hour wheel 23.
Since 83 is used, when the relative position between the hour hand wheel 23 and the reference wheel 21 always becomes exactly a fixed positional relationship, the reference wheel 21 suddenly moves in the direction of the hour hand wheel 23 and the reference contact is closed. is there. And if the rotation of the hour wheel 23 continues further, since the inclined portion 85 is provided in the hour wheel reverse direction of the reference projection 81,
The guide projection 81 is pushed out of the cam hole 73 by the inclined portion 85 provided on the guide projection 81, and the guide projection 81 is positioned on the surface of the guide cam plate 71 as shown in FIG. Without any hindrance, the hour wheel 23 can continue to rotate.

The end of the cam wheel 73 in the reverse direction of the hour wheel is not provided with a vertical wall but is provided with an appropriate inclination. The guide projection 81 is formed from the cam hole 73 together with the inclined portion 85 of the guide projection 81. Sometimes it is easy to come off. Also, when adjusting the alarm time by rotating the reference hand in the direction opposite to the rotation direction of the hour hand, similarly, the reference wheel 21 is fitted into the cam hole 73 without affecting the rotation of the hour hand wheel 23, And, it will come off from the cam hole 73 by the inclined portion 85 of the reference projection 81,
The indicator wheel 21 can be freely rotated in the reverse rotation direction of the hour hand wheel 23.

When the reference projection 21 is fitted into the cam hole 73 when the reference wheel 21 is rotated in the forward direction of the hour hand wheel 23 to set the alarm time, as shown in FIG. Although the vertical wall 83 of the guide projection 81 contacts the end of the cam hole 73 in the forward rotation direction of the hour wheel 73, since the guide cam plate 71 is rotatable with respect to the hour wheel 23, the guide wheel 21 is further When rotated in the normal rotation direction, as shown in FIG.
The reference cam plate 71 is rotated integrally with the reference wheel 21 by 83, and the guide projection 91 stored in the guide storage hole 75 is changed to the cam hole 73.
Rushing into.

In this state, when the reference wheel 21 is further rotated in the forward direction of the hour hand wheel 23, the flat portion 87 of the reference projection 81 is continued.
Is in contact with the inclined portion 95 of the guide projection 91, and the guide projection 81 is rotated by the inclination of the guide projection 91 in accordance with the rotation of the reference wheel 21.
, And the guide projection 81 comes off the cam hole 73 as shown in FIG. As described above, in the present embodiment, when the reference wheel 21 is rotated in the reverse direction of the hour wheel 23, the reference projection portion 81 is formed by the inclined portion 85 formed on the reference projection portion 81.
81 is disengaged from the cam hole 73, and when the reference wheel 21 is rotated in the forward direction of the hour hand wheel 23, the cam hole is
It is pushed out from 73, it is possible to set the alarm time by rotating the reference wheel 21, and eventually the reference hand in both forward and reverse directions, and the guide projection 91 provided on the hour hand wheel 23 to the reference cam plate 71. When the guide cam plate 71 and the hour wheel 23 are integrally rotated by being located in the provided guide storage hole 75 and the guide projection 81 falls into the cam hole 73, the reference contact is closed, and the guide contact is continuous with the cam hole 73. A guide storage hole 75 is formed in the guide cam plate 71,
A guide projection having an inclined portion 95, a vertical wall 93, and a rising portion 97.
91 is provided on the hour hand wheel 23, and a vertical wall is
Since it forms the 83 and the inclined portion 85, it is a guide mechanism that is easy to form and assemble.

[0025]

According to the present invention, a reference cam plate is provided between an hour hand wheel and a reference wheel, and a reference contact is closed by fitting a reference projection into a cam hole provided in the reference cam plate. When the indicator wheel is rotated in the reverse direction of the hour wheel, the indicator protrusion is removed from the cam hole by the inclined portion formed on the indicator wheel, and when the indicator wheel is rotated in the forward direction of the hour wheel, the hour wheel is rotated. The guide projection is pushed out of the cam hole by the inclined part of the guide projection provided in the guide mechanism.It is a guide mechanism that can set the alarm time by rotating the reference wheel and eventually the reference hand in both forward and reverse directions. The guide wheel can be rotated in both forward and reverse directions only by positioning the guide protrusion in the guide storage hole that is continuous with the cam hole.The guide signal is determined by the position where the guide protrusion fits into the cam hole. A guide when the relative position with the guide car is always constant No. can be output, and is capable of assembly to facilitate guideline mechanism.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing an outline of a guide mechanism according to the present invention.

FIG. 2 is a perspective view showing a guide cam plate used in the guide mechanism according to the present invention.

FIG. 3 is a perspective view showing an outline of a main part of a guide mechanism according to the present invention.

FIG. 4 is a view showing a state in which a guide protrusion showing a main part of the guide mechanism according to the present invention is detached.

FIG. 5 is a view showing a state in which a guide projection showing a main part of the guide mechanism according to the present invention is inserted into a cam hole;

FIG. 6 is a diagram showing a main portion of a guide mechanism according to the present invention immediately before a guide projection is fitted into a cam hole;

FIG. 7 is a view showing a state immediately after a guide projection showing a main part of the guide mechanism according to the present invention comes off the cam hole;

FIG. 8 is a view showing a state in which a guide projection showing a main part of the guide mechanism according to the present invention is pushed out from a cam hole.

FIG. 9 is a vertical sectional view showing an example of a conventional guide mechanism.

FIG. 10 is a view showing a state in which a cam claw in a conventional guide mechanism is fitted into a cam groove.

FIG. 11 is a diagram showing a state in which a cam claw in a conventional guide mechanism is disengaged from a cam groove.

FIG. 12 is a view showing a state immediately before a cam pawl in a conventional guide mechanism is fitted into a cam groove.

[Explanation of symbols]

 11 Guide axis 13 Hour hand axis 15 Minute hand axis 17 Second hand axis 19 Guide knob axis 21 Guide wheel 23 Hour hand wheel 25 Minute hand wheel 27 Second hand wheel 29 Guide wheel 31 Guide set plate 33 Through hole 35 Positioning pin 37 Convex portion 41 Cam pawl 43 Vertical Wall portion 45 Inclined portion 47 Concave portion 51 Cam groove 53 Front inclined portion 55 Rear inclined portion 59 Playing hole 61 Movable contact 63 Elastic body 65 Fixed contact 71 Guide cam plate 73 Cam hole 75 Guide storage hole 81 Guide projection 83 Vertical wall 85 Inclined portion 87 Flat portion 91 Guide protrusion 93 Vertical wall 95 Inclined portion 97 Rising portion

Claims (1)

(57) [Claims] An indicator wheel and an hour wheel are arranged coaxially, and the indicator wheel is pressed in the direction of the hour wheel by an elastic body, and a projection provided on the indicator wheel moves in accordance with rotation of the hour wheel. When the guide wheel is moved to the hour hand wheel side when fitted in the cam hole, the guide mechanism closes the reference contact by having a disk-shaped guide cam plate between the hour hand wheel and the guide wheel. A cam hole which is rotatable coaxially with the vehicle and which can accommodate a guide projection provided on a side surface of the reference wheel and has a vertical wall at an end portion of the cam hole in the forward rotation direction of the hour wheel. The guide protrusion provided on the side surface of the reference wheel has a vertical wall at the end in the forward direction of the hour wheel, and has an inclined portion in the reverse direction of the hour wheel. It has a guide storage hole that is continuous with the cam hole in the rolling direction and is narrower than the cam hole. A guide projection housed in the guide accommodation hole, the guide projection has a vertical wall at the end in the forward rotation direction of the hour wheel and a height not less than the thickness of the reference cam plate, and The timepiece guide mechanism has a structure that has a slope in the reverse direction and a vertical rising part at the end, and the rising part has a height that does not contact the reference projection.