JP2503704Y2 - Analog clock - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION This invention relates to an analog timepiece suitable for miniaturization.

[0002]

2. Description of the Related Art Generally, an analog timepiece is constructed by including a synchronous motor section and a timepiece train wheel section in a movement. The synchronous motor section drives a motor by receiving a drive signal from a time reference source such as a crystal. The gear train of the timepiece wheel train transmits the driving force to the pointer shaft, so that the pointer rotates.

As analog type timepieces of this type, there are known ones that are intended to be miniaturized, such as one having a smaller thickness and one having a smaller vertical and horizontal dimensions.

In order to make the thickness as thin as possible, three or more overlapping gears with a pinion are not provided, for example, as disclosed in Japanese Utility Model Laid-Open No. 63-52586, a rotor is used. A gear train of the gear train leading to the gear of the pointer shaft and the pinion are alternately provided, and a device for reducing the vertical and horizontal dimensions as much as possible is, for example, a device described in Japanese Utility Model Laid-Open No. 59-8388. In addition, there is a gear train in which the gear train is bent so as not to spread outward.

[0005]

In this type of analog timepiece, it is indispensable to include the synchronous motor section and the timepiece train wheel section as described above, and therefore, the existence of each constituent member that controls these indispensable configurations. Based on the above, it is decided whether or not the analog timepiece is downsized depending on how each component is arranged.

The present invention makes it possible to make the dimensions of the analog timepiece as small as possible in the vertical and horizontal directions and to make the analog timepiece thin even if it becomes smaller, and therefore to make the analog timepiece smaller in its entirety. The purpose is to obtain a different structure.

[0007]

In order to achieve the above object, the present invention will be described with reference to the reference numerals used in the embodiments, in that, between the upper plate 7 and the lower plate 9 of the watch case 1, Synchronous motor unit 3
In the analog timepiece in which the watch and the train wheel unit 5 are mounted, the synchronous motor unit 3 includes a horizontally long stator 11 arranged at an end of the timepiece case 1 and a coil 13 arranged along the stator 11. And a rotor 15 arranged at one end of the stator 11, and the timepiece train wheel unit 5 includes
A gear train extending from the rotor 15 to the gear of the pointer shaft and a handwheel 29 that meshes with the date wheel 23 of the gear train are provided, and the gear of the pointer shaft is arranged in the center of the timepiece case 1. At the same time, the diameter of the hour hand wheel 27 of the gear is made larger than that of the minute hand wheel 25 so as to be positioned below the stator 11, and the hand setting 29 is located at the end portion of the timepiece case 1 and the stator 11. And the dial back wheel 23 and the needle alignment 29
The analog timepiece meshed with the pinion 29a of the watch is the invention of claim 1, and the rotor 15 of the synchronous motor unit 3 has the pinion 15a formed on the lower plate 9 side of the timepiece case 1 and the upper plate 7 side. The magnets 15b are mounted, and the gears of the gear train extending from the rotor 15 to the gears of the pointer shaft and the pinion are sequentially provided alternately. Further, the gears of the date driving wheel 23 are set to the minute hand wheel 25 and the date driving wheel 23 of the date driving wheel 23. An analog timepiece in which the pinion 23a is meshed with the hour wheel 27 is the invention of claim 2, and in addition,
Cylindrical portion 9a protruding in the upper plate direction on the lower plate 9 of the watch case 1
The needle matching 29 is rotatably mounted on the outer side of the tubular portion 9a, and the needle matching receiver 31 having the flange 31a at the end portion in the upper plate direction is provided inside the tubular portion 9a. Insert it, and use the collar 31a of the needle setting receiver 31 to set the needle setting 2
The invention of claim 3 is an analog timepiece configured to prevent the 9 from coming off from the tubular portion 9a.

[0008]

In order to make the vertical and horizontal dimensions of the analog timepiece as small as possible, the structure as described in claim 1, that is, first, the gear of the pointer shaft is arranged in the center of the timepiece case. Is required. In other words, the pointer is attached to the pointer shaft, and the pointer is generally long and rotates, and the pointer indicating the rotational position (that is, time) of the rotating pointer and the dial provided with the pointer are usually This is because, if they exist, if the gear wheel of the pointer shaft is arranged at a position away from the center of the timepiece case, the timepiece becomes larger by the distance.

Further, by making the diameter of the hour hand wheel of the gear of the pointer shaft larger than that of the minute hand wheel and positioning it below the stator, it is possible to reduce the dimension in the vertical (horizontal) direction. Become.

The upper limit of the vertical (horizontal) dimension of the timepiece case is determined by locating the hand setting on the end of the timepiece case and on the side opposite to the stator. In other words, when attempting to reduce the thickness, it is not advisable to superimpose the needle-matching on the back wheel of the day, and therefore the needle-matching is located outside of the back-wheel of the day. Determines the upper limit of the vertical (horizontal) dimension of the watch case. Then, based on this, the back wheel of the day is engaged with the gear of the pointer shaft and the pinion of the needle alignment.

As described above, assuming that the gear of the pointer shaft, that is, the pointer is arranged in the center of the watch case, the stator of the synchronous motor section is arranged at the end of the watch case, and the coil is stator. The arrangement of the rotor along one side and the rotor at one end of the stator will be understood in the present invention as a configuration in which the dimension in the longitudinal (lateral) direction is made as small as possible.

In the second aspect, the gears and the pinions of the gear train extending from the rotor to the gear of the pointer shaft are alternately provided in sequence.
As a result, the number of overlapping gears with a pinion does not exceed 3, so that a reduction in thickness can be realized. And conventionally, in general,
The drive is transmitted from the third wheel to the minute hand wheel, and the drive is transmitted from the minute hand wheel to the back wheel of the day and from the back wheel of the day to the hour hand wheel. Drive gear is transmitted to the minute hand wheel and the back wheel of the day meshes with the hour hand wheel.
This reduces the number of drive transmissions by one,
It is possible to meet the tendency of the above-described thinning of the component member due to the thinning, and thus the labor-saving tendency of the operating portion accordingly.

Since the components of the timepiece are made thinner and thinner, the components made of metal are often used from the viewpoint of maintaining rigidity. In particular, when a metal such as aluminum is used for the pointer and the dial, the magnetic flux of the magnet is disturbed between the magnet and the magnet mounted on the rotor, which may lead to a time lag. In the rotor of the synchronous motor unit of the present invention, if a kana is attached to the lower plate side of the watch case and a magnet is attached to the opposite upper plate side, the magnet and the pointer / dial plate are separated from each other by a considerable amount. It is possible to avoid the disturbance of, and it is possible to ensure the accuracy of the operation.

Further, in order to make the timepiece thinner, it is required to reduce the number of members in addition to thinning and downsizing the constituent members. According to a third aspect of the present invention, a cylindrical portion protruding in the upper plate direction is formed on the lower plate of the watch case, and the needle matching is rotatably mounted on the outer side of the cylindrical portion, so that a separate member for supporting the needle matching is provided. It can be carried out without providing, and further, by inserting a needle matching receiver having a flange at the end portion in the upper plate direction inside the tubular portion, the needle matching can be performed with the flange of the needle matching receiver. Preventing separation from the tubular portion.

As described above, according to the present invention, it is possible to reduce the size of the entire structure of this type of analog timepiece.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, an analog timepiece of the present invention is constructed by mounting a synchronous motor section 3 and a timepiece train wheel section 5 in a slightly laterally long timepiece case 1 whose upper end is formed in a smooth curved shape. To be done.

The synchronous motor section 3 is a section for driving a motor by obtaining a drive signal from a time reference source such as a crystal, and the timepiece train wheel section 5 is composed of a plurality of gear trains as described later.
This is a part that transmits the driving force from the synchronous motor unit 3 to a pointer (not shown). Although these basic configurations are common to the conventional analog timepiece, as shown in FIGS. 2 to 4, in the present invention, the synchronous motor unit 3 and the timepiece train wheel unit 5 are provided in the movement. Instead of being provided, it is mounted between the upper plate 7 and the lower plate 9. Further, in this embodiment, the support shafts 7a, 7a are provided so as to project from the upper plate 7 to the lower plate 9, and the clock train wheel portion 5 is pivotally supported by these support shafts.

However, as will be described later, the minute hand wheel 25 and the hour hand wheel 27 which are the gears of the pointer shaft are pivotally supported by the upper plate 7.

The synchronous motor unit 3 has a horizontally long stator 11 arranged at an end of the timepiece case 1 (a lower portion of the timepiece case 1 in the embodiment), a coil 13 arranged along the stator 11, and the stator. 11, a rotor 15 arranged at one end (in the embodiment of FIG. 1, on the left side of the stator 11 and above the coil).

As shown in FIG. 2, the stator 11 is located on the upper plate 7 side, and an iron core (not shown) is mounted on the lower plate 9 side of the stator 11. The fact that the stator 11 is located on the upper plate 7 side has meaning in relation to the hour hand wheel 27 described later.

The timepiece train wheel portion 5 includes a fifth wheel 17 that meshes with the rotor pinion 15a of the rotor 15, a fourth wheel 19 that meshes with the fifth pinion 17a, and a third wheel 21 that meshes with the fourth pinion 19a.
It is composed of a back wheel 23 of the day that meshes with the third pinion 21a, a minute hand wheel 25 that meshes with the back wheel 23 of this day, and an hour hand wheel 27 that meshes with the back pinion 23a of the day. To the minute hand wheel 25 and the hour hand wheel 27, which are the gears of the pointer shaft, and have a semi-circular shape, and the minute hand wheel 25 is arranged so that the pointer shaft is located at the center of the timepiece case 1.
An hour hand wheel 27 is provided at a predetermined position.

Incidentally, conventionally, drive is generally transmitted from the third wheel to the minute hand wheel, and is transmitted from the minute hand wheel to the back wheel of the day and from the back wheel of the day to the hour hand wheel. However, in the present embodiment, Drive is transmitted from the third wheel 21 to the day driving wheel 23, the gears of the day driving wheel 23 are transferred to the minute hand wheel 25, and the day driving wheel 23.
Since the pinion 23a of each of the hooks 23a meshes with the hour hand wheel 27, thereby reducing the number of times of drive transmission by one, the above-mentioned thinning tends to reduce the thickness of the constituent members, and thus the operating portion associated therewith. It is possible to match with the tendency of labor saving.

The minute hand wheel 25 and the hour hand wheel 27 are pivotally supported on the upper plate 7. That is, the cylindrical support shaft 7b is provided from the upper plate 7 to the lower plate 9, and the support shaft 7b is provided with the pointer shaft 2 of the minute hand wheel 25.
5a is rotatably mounted, and on the outside of the pointer shaft 25a,
The pointer shaft 27a of the hour hand wheel 27 is mounted, and these pointer shafts 2
A minute hand and an hour hand (not shown) are attached to 5a and 27a. The hour wheel 27 is provided with a notch at an appropriate position to form an elastic piece 27b, and the elastic piece 27b is brought into sliding contact with the lower plate 9 to elastically bias the hour wheel 27 toward the upper plate 7, This prevents rattling of the minute hand wheel 25 and the hour hand wheel 27.

A part of the gear wheel of the pointer shaft arranged in the center of the watch case 1 is located below the stator 11 (see FIG. 1). The gear of the pointer shaft here is an hour wheel 27 having a diameter larger than that of the minute wheel 25, as shown in FIG. More specifically, the minute hand wheel 25 is located at the same height as the stator 11 and, as described above, the stator 11 is located on the upper plate 7 side, so that the stator 11 is located on the lower plate 9 side. A part of the hour hand wheel 27 can be inserted into the provided space. In this way, by locating a part of the hour hand wheel 27 below the stator, it becomes possible to reduce the dimension in the vertical direction as compared with the case where it is not positioned.

As described above, the hour wheel 27 is replaced by the minute wheel 2
Since the diameter is larger than 5, the meshing of each of the large diameter back wheel 23 and the small minute hand wheel 25, and the small diameter back wheel 23a and the large hour wheel 27 is made logically. It will be. In other words, the gear of the date driving wheel 23 meshes with the minute hand wheel 25, and the pinion 23a of the date driving wheel 23 meshes with the hour hand wheel 27, whereby the number of times of drive transmission is 1
Since the number of times is reduced, it is possible to meet the tendency of thinning of the constituent members due to the thinning of the timepiece, and accordingly the tendency of labor saving of the operating portion.

In the above-mentioned gear train, the rotor 15 of the synchronous motor unit 3 has the pinion 15 on the lower plate 9 side of the watch case 1.
While forming a, the magnet 15b is attached to the opposite side (upper plate 7 side). In this case, the magnet 15b and the pointer / dial plate (not shown) are separated from each other, so that even if a metal pointer or / and a dial is used, the magnetic flux in the synchronous motor unit 3 will be increased. It is possible to avoid the disturbance of, and it is possible to ensure the accuracy of the operation.

Further, the gear and the pinion of the gear train extending from the rotor 15 to the gear of the pointer shaft (the minute hand wheel 25 and the hour hand wheel 27) are
They are provided alternately in sequence. In this case, the number of overlapping gears with a pinion does not exceed 3, so that it is possible to reduce the thickness.

In FIGS. 1 and 5, reference numeral 29 indicates a needle fitting which meshes with the date back wheel 23. This needle fitting 29 is the end portion (in the embodiment, the center of the end portion) of the timepiece case 1 and is described above. It is located on the opposite side of the stator 11. The needle alignment 29
, The kana 29a meshes with the back wheel 23 of the day.

This hand setting 29 is the lower plate 9 of the watch case 1.
It is attached to the cylindrical portion 9a formed in the above and is held by the needle matching receiver 31. More specifically, a tubular portion 9a protruding toward the upper plate 7 is formed on the lower plate 9 of the watch case 1, and the needle fitting 29 is rotatably mounted on the outer side of the tubular portion 9a, and the tubular shape is provided. A needle matching receiver 31 having a flange 31a at the end in the upper plate direction is inserted inside the portion 9a, and the needle matching 29 is formed by the flange 31a of the needle matching receiver 31.
It prevents you from leaving a.

Needless to say, when the hand setting 29 is turned, the minute wheel 23 and the hour hand wheel 27 rotate to bring the pointer to an arbitrary corrected position. However, the third wheel and pinion 21a also rotates at the same time. However, 3rd car 2 against 3rd car kana 21a
Since a so-called slip mechanism for slipping 1 is provided,
The rotational driving force due to the above-mentioned needle alignment does not go back to the train wheel.

[Brief description of drawings]

FIG. 1 is a plan view showing a train wheel configuration of the present invention.

FIG. 2 is a sectional view showing a train wheel structure of the present invention, showing a rotor,
The car number 4, the number 3 and the number 3 part.

FIG. 3 is a cross-sectional view showing a train wheel structure of the present invention, which is a fourth wheel, 3
The watch wheel, the part of the back car of the day.

FIG. 4 is a cross-sectional view showing a train wheel configuration of the present invention, showing
The part of the minute hand wheel and hour hand wheel.

FIG. 5 is a cross-sectional view showing a train wheel configuration of the present invention, showing a portion where the date wheel and needle are aligned.

[Explanation of symbols]

 1 Watch case 3 Synchronous motor part 5 Clock train part 7 Upper plate 9 Lower plate 11 Stator 15 Rotor 23 Day back wheel 25 Minute hand wheel 27 Hour hand wheel 29 Needle alignment

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G04B 33/06 G04B 33/06

Claims (3)

(57) [Scope of utility model registration request] 1. An analog timepiece in which a synchronous motor section and a timepiece train wheel section are mounted between an upper plate and a lower plate of a watch case, wherein the synchronous motor section is arranged at an end of the watch case. A horizontally elongated stator, a coil arranged along the stator, and a rotor arranged at one end of the stator, wherein the timepiece train wheel unit includes a gear train extending from the rotor to a gear of a pointer shaft; In this gear train, there is provided a hand wheel that meshes with a day wheel, and the gear wheel of the pointer shaft is arranged in the center of the timepiece case, and the diameter of the hour hand wheel of the gear wheel is larger than that of the minute hand wheel. It is made larger and is located below the stator, and the hands are located at the end of the timepiece case and on the side opposite to the stator. Characterized by mating with a matching kana Analog clock that. 2. The rotor of the synchronous motor unit has a pin on the lower plate side of the watch case and a magnet on the upper plate side, and the gear and the pinion of the gear train from this rotor to the gear of the pointer shaft are sequentially arranged. 2. The analog timepiece according to claim 1, wherein the wheel of the day wheel is meshed with the minute hand wheel and the pinion of the day wheel is meshed with the hour wheel, which are alternately provided. 3. A lower part of the watch case is formed with a tubular part projecting in an upper plate direction, a needle fitting is rotatably mounted on the outside of the tubular part, and the inside of the tubular part is A needle matching receiver having a flange at an end in the upper plate direction is inserted, and the flange of the needle matching receiver prevents the needle matching from coming off from the tubular portion. An analog watch according to item 1.