JPH0547889U - Analog clock - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the vertical and horizontal dimensions and thickness of an analog timepiece as much as possible, and to downsize the overall structure of the analog timepiece. In an analog timepiece in which a synchronous motor unit and a timepiece train wheel unit are mounted between an upper plate and a lower plate of a watch case, the synchronous motor unit has a horizontally long shape arranged at an end of the watch case. Of the stator, a coil arranged along the stator, and a rotor arranged at one end of the stator, the timepiece train wheel unit includes a gear train extending from the rotor to a gear of the pointer shaft, and the gear train. The wheel of the pointer shaft is arranged in the center of the watch case, and the diameter of the hour wheel is larger than that of the minute wheel. Position the lower hand of the stator, and position the hands at the end of the watch case on the opposite side of the stator. I meshed with Kana.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an analog timepiece suitable for miniaturization.

[0002]

[Prior Art]

 Generally, analog timepieces are configured with a synchronous motor unit and a timepiece train wheel unit in the movement.The synchronous motor unit receives a drive signal from a time reference source such as a crystal to drive the motor, and The part is configured such that the gear train transmits the driving force to the pointer shaft, whereby the pointer rotates.

In this type of analog timepiece, there are known ones that are intended to be miniaturized, one that is thin and one that is small in vertical and horizontal directions.

In order to make the thickness as thin as possible, the number of gears with a pinion should not be three or more. For example, as disclosed in Japanese Utility Model Laid-Open No. 63-52586, A gear train of the gear train leading to the gear of the pointer shaft and the pinion are alternately provided in order, and as a technique for reducing the size in the vertical and horizontal directions as much as possible, for example, a device disclosed in Japanese Utility Model Laid-Open No. 59-8388 is disclosed. As described above, there is one in which the gear train is bent so as not to spread outward.

[0005]

[Problems to be solved by the device]

 In this type of analog timepiece, it is indispensable to include the synchronous motor section and the timepiece train wheel section as described above. Therefore, assuming that the respective constituent members that control these essential components exist, Depending on how they are arranged, it is decided whether or not the analog timepiece will be downsized.

The present invention makes it possible to reduce the vertical and horizontal dimensions of an analog timepiece as much as possible, and to make the analog timepiece thinner even if the size is reduced, and thus to reduce the size of the entire analog timepiece. The purpose is to obtain a unique structure.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention will be described with reference to the reference numerals used in the embodiments. Between the upper plate 7 and the lower plate 9 of the watch case 1, the synchronous motor unit 3 and the timepiece train wheel unit are provided. 5, the synchronous motor unit 3 includes a horizontally elongated stator 11 arranged at an end of the timepiece case 1, a coil 13 arranged along the stator 11, and The timepiece train wheel unit 5 includes a rotor 15 arranged at one end of the stator 11, and the timepiece train wheel unit 5 meshes with a gear train extending from the rotor 15 to a gear of a pointer shaft and a back wheel 23 on the other side of the gear train. The handwheel 29 is provided, the gear of the pointer shaft is arranged at the center of the timepiece case 1, and the diameter of the hour hand wheel 27 of the gear is made larger than that of the minute hand wheel 25 so that the stator 11 Position it downwards and set the needle adjustment 29 to the watch case. An analog timepiece in which the end wheel of the wheel 1 is located on the opposite side to the stator 11 and the date wheel 23 is meshed with the gear of the pointer shaft and the pinion 29a of the needle matching 29. In addition, the rotor 15 of the synchronous motor unit 3 has a pin 15a formed on the lower plate 9 side of the watch case 1 and a magnet 15b mounted on the upper plate 7 side. The gears of the gear train leading to the gears and the pinions are alternately provided in sequence, and further, the gears of the day back wheel 23 mesh with the minute hand wheel 25 and the pinions 23a of the day back wheel 23 mesh with the hour hand wheel 27, respectively. An analog timepiece is defined as the invention of claim 2, and in addition, a cylindrical portion 9a protruding in the upper plate direction is formed on the lower plate 9 of the timepiece case 1, and the needle fitting 29 is rotatable on the outside of this cylindrical portion 9a. While mounting, the inside of the tubular portion 9a is An analog timepiece in which a needle matching receiver 31 having a flange 31a at the end in the direction is inserted, and the needle matching 29 prevents the needle matching 29 from coming off from the tubular portion 9a. Is the invention of claim 3.

[0008]

[Action / effect]

 In order to reduce the vertical and horizontal dimensions of the analog timepiece as much as possible, it is required that the structure as described in claim 1, that is, first, the gear wheel of the pointer shaft is arranged at the center of the timepiece case. Is done. In other words, a pointer is attached to the pointer shaft, and the needle is generally elongated and rotates, and the indicator indicating the rotational position (that is, time) of the rotating pointer and the character provided with it. Since the plate is usually present, if the gear wheel of the pointer shaft is placed away from the center of the watch case, the watch becomes larger by the distance.

Furthermore, 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 vertical (horizontal) dimension. Become.

By positioning the hand setting on the end of the timepiece case and on the side opposite to the stator, the upper limit of the vertical (horizontal) dimension of the timepiece case is determined. In other words, when attempting to reduce the thickness, it is not advisable to superimpose the needle alignment with the day back wheel, and therefore the needle alignment is located outside the day back wheel. Depending on the position, the upper limit of the vertical (horizontal) dimension of the watch case is determined. 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 unit 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 that minimizes the dimension in the longitudinal (transverse) direction.

[0012] In claim 2, the gears and the pinions of the gear train extending from the rotor to the gears 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 thin structure can be realized. Further, conventionally, drive is generally transmitted from the third hand 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. The drive is transmitted from the car to the back wheel of the day, the gears of the back wheel of the day mesh with the minute hand wheel, and the kana of the back wheel of the day meshes with the hour hand wheel. Since the number is reduced once, it is possible to meet the tendency of the above-described thinning of the constituent members due to the thinning, and thus the labor saving tendency of the operating part.

As the timepiece is made thinner, the constituent members are also made thinner and smaller, so that metal members are often used for these constituent members from the viewpoint of maintaining rigidity. In particular, when a metal such as aluminum is used for the hands and dial, the magnetic flux of the magnet may be disturbed between the magnet and the magnet mounted on the rotor, which may lead to time lag. In the rotor of the synchronous motor unit of the present invention, if a kana is installed on the lower plate side of the watch case and a magnet is installed on 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 reduce the thickness of the timepiece, in addition to thinning and downsizing the constituent members, labor saving of the number of members is required. According to a third aspect of the present invention, a member for supporting the needle matching is separately provided by forming a cylindrical portion protruding in the upper plate direction on the lower plate of the watch case, and rotatably mounting the needle matching on the outer side of the cylindrical portion. Can be carried out without the need to provide a needle-matching receiver having a collar at the end in the direction of the upper plate inside the tubular portion. Are prevented from coming off 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]

【Example】

 In FIG. 1, the 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.

The synchronous motor unit 3 is a unit that drives a motor by obtaining a drive signal from a time reference source such as a crystal, and the timepiece train wheel unit 5 is composed of a plurality of gear trains as will be described later. This is a part that transmits the driving force from the motor unit 3 to a pointer (not shown). Although these basic configurations are common to those of 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 the movement members. Instead of being provided inside, 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 watch wheel train 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 includes a horizontally long stator 11 arranged at an end of the watch case 1 (a lower part of the watch case 1 in the embodiment), a coil 13 arranged along the stator 11, and the stator. 11 and 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 a meaning in relation to the hour wheel 27 described later.

The clock train wheel portion 5 includes a fifth wheel 17 that meshes with the rotor pinion 15 a of the rotor 15 and a fourth wheel 19 that meshes with the fifth pinion 17 a and a third wheel 21 and third pinion that meshes with the fourth pinion 19 a. 21a, a back wheel 23 that meshes with the day, a minute hand wheel 25 that meshes with the back wheel 23 of the day, and an hour wheel 27 that meshes with the back pinion 23a of the day. The minute hand wheel 25 and the hour hand wheel 27 are predetermined so that the minute hand wheel 25 and the hour hand wheel 27, which are the gears of the pointer axis, reach a semi-circular shape, and the pointer axis is located at the center of the watch case 1. It is provided at the location.

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. While the drive is transmitted from the third wheel 21 to the day wheel 23, the gear of the day wheel 23 meshes with the minute hand wheel 25, and the pinion 23a of the day wheel 23 engages with the hour wheel 27. Since the number of times of drive transmission is reduced by one by adopting the configuration, it is possible to meet the tendency of thinning of the constituent members due to the above-mentioned thinning and therefore the tendency of labor saving of the operating part accordingly. .

The minute hand wheel 25 and the hour hand wheel 27 are pivotally supported by the upper plate 7. That is, a cylindrical support shaft 7b is provided from the upper plate 7 to the lower plate 9, the pointer shaft 25a of the minute hand wheel 25 is rotatably mounted on the support shaft 7b, and the hour hand wheel is provided outside the pointer shaft 25a. A pointer shaft 27a of 27 is attached, and a minute hand and an hour hand (not shown) are attached to these pointer shafts 25a and 27a. The hour hand wheel 27 is provided with a notch at an appropriate position to form an elastic piece 27b, and the elastic piece 27b is slidably contacted with the lower plate 9 to elastically bias the hour hand 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. A part of the hour 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 size in the vertical direction as compared with the case where it is not positioned.

Further, since the hour hand wheel 27 has a larger diameter than the minute hand wheel 25 as described above, the large diameter day back wheel 23 and the small diameter minute hand wheel 25, and the small diameter day back pinion 23a and the large diameter day wheel 23a. The respective meshes of the hour hand wheels 27 are logically made. In other words, the gears of the hour wheel 23 are meshed with the minute hand wheel 25, and the pinion 23a of the date wheel 23 is meshed with the hour wheel 27, respectively, thereby reducing the number of times of drive transmission by one. Therefore, 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 parts.

In the above-described gear train, the rotor 15 of the synchronous motor unit 3 has the pinion 15a formed on the lower plate 9 side of the watch case 1 and the magnet 15b mounted on the opposite side (upper plate 7 side) thereof. is doing. With this arrangement, 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 gears and the pinions of the gear train extending from the rotor 15 to the gears of the pointer shaft (the minute hand wheel 25 and the hour hand wheel 27) are provided alternately in sequence. By doing so, the number of overlapping gears with a pinion does not exceed 3, so that a reduction in thickness can be realized.

In FIGS. 1 and 5, reference numeral 29 indicates a needle fitting that meshes with the date back wheel 23. The needle fitting 29 is the end portion (in the embodiment, the center of the end portion) of the timepiece case 1 and is the aforementioned It is located on the opposite side of the status 11. In addition, the pinion 29a of the pinion 29a meshes with the back wheel 23 of the day.

The hand setting 29 is attached to the tubular portion 9 a formed on the lower plate 9 of the watch case 1, and is held by the hand setting receiver 31. To describe this in detail, a tubular portion 9a protruding toward the upper plate 7 is formed on the lower plate 9 of the watch case 1, and a needle fitting 29 is rotatably mounted on the outer side of the tubular portion 9a, and Inside the portion 9a, a needle matching receiver 31 having a flange 31a at the end in the upper plate direction is inserted, and the needle matching 29 is detached from the tubular portion 9a by the flange 31a of the needle matching receiver 31. It is blocking.

Needless to say, when the hand setting 29 is turned, the minute wheel 23 and the hour wheel 27 are rotated to bring the pointer to an arbitrary corrected position. However, at the same time, the third wheel & pinion 21a also rotates. However, since a so-called slip mechanism for allowing the third wheel & pinion 21a to slip with respect to the third wheel & pinion 21a is provided, the rotational driving force due to the above-mentioned hand setting does not go back in 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 configuration of the present invention, which is a fourth wheel, 3
The watch car, the part of the back car of the day.

FIG. 4 is a sectional view showing a train wheel configuration of the present invention,
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

Claims (3)

[Scope of utility model registration request] 1. An analog timepiece in which a synchronous motor unit and a timepiece train wheel unit are mounted between an upper plate and a lower plate of a watch case, wherein the synchronous motor unit 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 handwheel that meshes with a day wheel, and the gear wheel of the pointer shaft is arranged at the center of the timepiece case. 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 synchronous motor rotor has a rotor formed with a pin on the lower plate side of the watch case and a magnet mounted on the upper plate, and the gear and the pinion of the gear train from the rotor to the gear of the pointer shaft are sequentially arranged. 2. An analog timepiece according to claim 1, wherein the gears of the back wheel of the day mesh with the minute hand wheel and the pinions of the back wheel of the day mesh with the hour hand wheel, respectively. 3. A cylindrical portion projecting in the direction of the upper plate is formed on the lower plate of the watch case, the needle fitting is rotatably mounted on the outer side of the cylindrical part, and the inner side of the cylindrical 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 being separated from the tubular portion. An analog watch according to item 1.