JP5660682B2 - Analog watch movement - Google Patents

Description

  The present invention relates to a movement of an analog timepiece having a hand setting function.

  The movement for driving the hands of the timepiece is configured such that the pointer pipe is driven by a motor through a speed reduction mechanism. In general, the indicator pipe includes an hour hand pipe for attaching the hour hand and a minute hand pipe for attaching the minute hand, and the power of the motor transmitted to the minute hand pipe is transmitted to the hour hand pipe via the minute wheel. ing. In addition, a needle alignment hook is connected to the minute wheel, and by rotating the needle alignment hook, the display time of the pointer can be corrected from the outside of the movement case. Patent Document 1 discloses such a needle alignment mechanism. Further, as described in Patent Document 2, the hand alignment mechanism is also provided in a movement of a radio-controlled timepiece that receives a standard time radio wave and corrects its display time.

  In particular, in the case of a radio-controlled timepiece, the position of the pointer pipe is automatically corrected by position detection by a predetermined position detection means and motor control. Therefore, it is not usually necessary to operate the needle alignment mechanism. The needle alignment mechanism is exclusively used for convenience during manufacture and inspection. That is, if the user operates this by mistake, it may rather hinder accurate time display. Patent Document 3 discloses a movement devised in consideration of such circumstances.

Japanese Patent No. 3050788 Japanese Patent Laid-Open No. 2005-189084 JP 2010-38584 A

  Now, the conventional needle alignment mechanism rotates the minute wheel with the needle alignment cana as described above. By rotating the minute wheel, the position of the pointer can be finely adjusted based on the reduction ratio. However, when moving the pointer at the time of manufacturing or inspection, a rough operation different from the delicate adjustment is required, such as moving the pointer several hours at a time.

  In other words, at present, a needle alignment mechanism that rotates the minute wheel is used at the time of manufacturing and inspection, but considering the workability and labor, a configuration that can move the pointer more quickly is necessary. It is believed that there is.

  In particular, in the case of a radio-controlled timepiece, the function of hand alignment during use is unnecessary. Therefore, if a rough needle alignment operation is performed only at the time of manufacturing or inspection, it is devised so that the pointer can be moved at an appropriate reduction ratio without providing a needle alignment hook that rotates the minute wheel. It is desirable to do.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a movement of an analog timepiece having a small number of components and excellent operability of hand alignment at the time of manufacture and inspection.

The first aspect of the present invention includes a motor (100), a speed reduction mechanism (110) including a gear train connected to the motor (100), and a minute hand pipe connected to the speed reduction mechanism (110) ( 120), a movement (1) of an analog timepiece comprising an hour hand pipe (130) connected to the minute hand pipe (120) via a minute wheel (140) and a case body (300) for supporting them. )
The case body (300) includes a first case member (310) and a second case member (320), and an intermediate plate (330) between the first and second case members (310, 320). ,
One of the gears (111) of the speed reduction mechanism (110) is provided between the first case member (310) and the middle plate (330), and is provided on one end surface in the rotation axis direction thereof. , Provided with a groove (111c) for inserting the rotary tool,
The first case member (310) includes an opening (301) that exposes the groove (111c), and a cylindrical boss (302) that protrudes inward from the opening (301) .
The gear (111) provided with the groove portion (111c) is provided by loosely fitting one end portion in the rotation axis direction to the cylindrical boss portion (302), and further, the groove portion of the gear (111). (111c) on the opposite side of the gear surface portion is provided on the boss portion (330a) of the intermediate plate (330),
When the gear (111) is attached to the opening (301) of the first case member (310), the end surface of the gear (111) having the groove (111c) is located in the opening (301). And
The minute hand pipe (120) and the hour hand pipe (130) are movements (1) of an analog timepiece configured to be able to rotate by operating the groove (111c) using the rotary tool. .

  ADVANTAGE OF THE INVENTION According to this invention, the movement of the analog timepiece which has few components and was excellent in the operativity of the hand alignment at the time of manufacture or an inspection can be obtained.

FIG. 6 is a side sectional view showing a movement of an analog timepiece according to the embodiment of the present invention. It is a rear view which shows the movement (state which removed the 1st case member) of the analog timepiece concerning the Example of this invention. FIG. 4 is a side cross-sectional view showing the main part of the movement of the analog timepiece according to the embodiment of the present invention. It is a side sectional view showing a principal part of a gear provided with a groove part and a case body in an example of the present invention.

  Embodiments of the present invention will be described below with reference to the drawings. The movement 1 of the analog timepiece shown in FIGS. 1 to 4 is connected to a first stepping motor 100, a first reduction mechanism 110 including a gear train connected to the first stepping motor 100, and the first reduction mechanism 110. A second reduction mechanism 210 comprising a minute hand pipe 120, an hour hand pipe 130 connected to the minute hand pipe 120 via the minute wheel 140, a second stepping motor 200, and a gear train connected to the second stepping motor 200. And a second hand pipe 220 connected to the second speed reduction mechanism 210 and a case body 300 for supporting them.

  Specifically, a minute hand pipe 120 for attaching a minute hand, an hour hand pipe 130 for attaching an hour hand, and a second hand pipe 220 for attaching a second hand are provided concentrically. The speed reduction mechanism 110 connected to the first stepping motor 100 is connected to a gear portion 120 a provided at the proximal end portion of the minute hand pipe 120. Further, the pinion 120b provided at the proximal end portion of the minute hand pipe 120 is connected to the minute wheel 140, and the gear portion 130a provided at the proximal end portion of the hour hand pipe 130 is connected to the pinion 140b of the minute wheel 140. It is connected with. A second speed reduction mechanism 210 connected to the second stepping motor 200 is connected to a gear portion 220 a provided at the base end portion of the second hand pipe 220. The minute hand pipe 120 and the hour hand pipe 130 are driven to rotate at a predetermined speed by the first stepping motor 100, and the second hand pipe 220 is driven to rotate at a predetermined speed by the second stepping motor 200.

  The case body 300 is a flat type formed by assembling the first case member 310 on the back side and the second case member 320 on the front side in the thickness direction. An intermediate plate 330 on which the first stepping motor 100 and the second stepping motor 200 are mounted is provided between the first case member 310 and the second case member 320. The second case member 320 is provided with a circuit board 400 that controls the first stepping motor 100 and the second stepping motor 200.

  Inside the case body 300, there are a first stepping motor 100, a second stepping motor 200, a first speed reduction mechanism 110, a second speed reduction mechanism 210, a minute wheel 140, and a base of each indicator pipe 120, 130, 220. The end is stored. Concavities and convexities, bosses, support shafts, and the like for holding the respective constituent members are formed at important points of the first case member 310, the second case member 320, and the intermediate plate 330. The tip portions of the pointer pipes 120, 130, and 220 protrude from the second case member 320 toward the front. The first case member 310 and the second case member 320 are screwed together. The circuit board 400 is screwed over the front surface of the second case member 320. The circuit board 400 is provided with holes through which the pointer pipes 120, 130, and 220 are inserted.

  The movement 1 of this example constitutes a radio-controlled timepiece that receives a standard time radio wave and corrects its display time. The movement 500 is provided with an antenna 500 for receiving the standard time radio wave in the case body 300 and the receiving operation. The circuit board 400 is provided with a receiving circuit for controlling the above. The first case member 310 is integrally provided with a mounting portion 311 for the antenna 500 at a portion protruding to the side portion of the second case member 320 when viewed from the front side of the case body 300. The mounting portion 311 has a box shape with an opening on the front side, and a snap for fixing the end portion of the antenna 500 is provided therein.

  Further, position detection means (not shown) for detecting the positions of the minute hand pipe 120 and the hour hand pipe 130 and the position of the second hand pipe 220 are provided at important points of the movement 1. The positions of the pointer pipes 120, 130, and 220 are automatically corrected according to the received standard time radio wave by position detection by the position detection means and control of the stepping motors 100 and 200 by the circuit board 400. ing.

Next, the hand alignment in the movement 1 of the analog timepiece of this example will be described. The minute hand and the hour hand are aligned by directly rotating one of the gears of the first reduction mechanism 110 with a rotary tool such as a plus driver or a minus driver. In the case of this example, the gear 111 (so-called third wheel) of the first speed reduction mechanism 110 having a pinion 111b that meshes with the gear portion 120a provided on the minute hand pipe 120 is rotated on one end face in the rotation axis direction. A groove 111c for inserting a tool is provided. The gear 111 provided with the groove 111c is rotatably provided with both end portions in the rotation axis direction being attached to the first case member 310 and the intermediate plate 330, respectively. The first case member 310 includes an opening 301 that exposes the groove 111c, and a cylindrical boss 302 that protrudes from the opening 301 toward the inside thereof. The groove 111 c is located behind the opening 301 from the surface of the case body 300. The minute hand pipe 120 and the hour hand pipe 130 are configured to be rotated by operating the groove 111c using a rotating tool. As described above, the gear 111 is provided rotatably at both ends in the direction of the rotation axis attached to the first case member 310 and the intermediate plate 330. In this example, as shown in FIG. Further, a gear surface portion of the gear (111) opposite to the groove portion (111c) is provided on the boss portion (330a) of the intermediate plate (330).

  The gear 111 provided with the groove portion 111 c is provided by loosely fitting one end portion in the rotation axis direction to the cylindrical boss portion 302. According to such a configuration, the gear 111 can be stably supported even when the groove 111c is operated with the rotary tool. In addition, one end portion of the gear 111 and the cylindrical boss portion 302 are provided with ring surfaces 111R and 302R perpendicular to the rotation axis direction of the gear 111, respectively. They are facing each other. According to such a configuration, it is possible to prevent dust from entering through the opening 301 from the outside to the inside of the case body 300.

  As described above, the movement of the analog timepiece of the present example can rotate the minute hand and the hour hand without providing the hand setting pinion for rotating the minute wheel like the conventional hand setting mechanism. . In addition, the minute hand and hour hand can be moved more quickly than in the case of rotating the minute wheel. That is, the movement is extremely rationally configured as a movement with few components and excellent operability in needle alignment at the time of manufacture and inspection. In addition, it is needless to say that the configuration of each part in the present example can be appropriately changed in design within the technical scope described in the claims, and is not limited to that illustrated in the drawings. For example, in this example, the groove portion is provided in a so-called third wheel, but such a groove portion may be provided in another gear of the first reduction gear mechanism.

  The present invention can be suitably used as a movement of an analog timepiece constituting a radio-controlled timepiece.

DESCRIPTION OF SYMBOLS 1 Movement of analog timepiece 100 1st stepping motor 110 1st reduction mechanism 111 Gear provided with groove part 111b Kana 111c Groove part 111R Ring surface 120 Minute hand pipe 120a Gear part 120b Kana 130 Hour hand pipe 130a Gear part 140 Day wheel 140b Kana 200 Second stepping motor 210 Second speed reduction mechanism 220 Second hand pipe 220a Gear portion 300 Case body 301 Opening portion 302 Cylindrical boss portion 302R Ring surface 310 First case member 311 Antenna mounting portion 320 Second case member 330 Middle plate
330a boss part 400 circuit board 500 antenna

Claims (1)

A motor (100) , a speed reduction mechanism (110) comprising a gear train connected to the motor (100) , a minute hand pipe (120) connected to the speed reduction mechanism (110) , and a minute wheel (140) In the movement (1) of the analog timepiece including the hour hand pipe (130) connected to the minute hand pipe (120) through the case and the case body (300) for supporting them.
The case body (300) includes a first case member (310) and a second case member (320), and an intermediate plate (330) between the first and second case members (310, 320). ,
One of the gears (111) of the speed reduction mechanism (110) is provided between the first case member (310) and the middle plate (330), and is provided on one end surface in the rotation axis direction thereof. , Provided with a groove (111c) for inserting the rotary tool,
The first case member (310) includes an opening (301 ) that exposes the groove (111c), and a cylindrical boss (302) that protrudes inward from the opening (301) .
The gear (111) provided with the groove portion (111c) is provided by loosely fitting one end portion in the rotation axis direction to the cylindrical boss portion (302), and further, the groove portion of the gear (111). (111c) on the opposite side of the gear surface portion is provided on the boss portion (330a) of the intermediate plate (330),
When the gear (111) is attached to the opening (301) of the first case member (310), the end surface of the gear (111) having the groove (111c) is located in the opening (301). And
The movement of an analog timepiece, wherein the minute hand pipe (120) and the hour hand pipe (130) can be rotated by operating the groove (111c) using the rotary tool.

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