JP5649228B2 - Radio correction clock - Google Patents

Description

  The present invention relates to an analog radio-controlled timepiece having a hand alignment 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. When the minute wheel is rotated with the needle alignment kana, it is possible to finely adjust the position of the pointer from the relationship between the reduction ratios. However, when moving the pointer at the time of manufacturing or inspection, in addition to a rough operation such as moving the pointer for several hours at a time, it is necessary to perform more precise adjustment than when moving the pointer at the time of use.

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

  In particular, in the case of a radio-controlled timepiece, the function of hand alignment during use is unnecessary. Therefore, if the needle alignment operation is performed only at the time of manufacturing or inspection, it is devised so that the pointer can be moved accurately with 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 of the present invention is to provide an analog type radio-controlled timepiece having a small number of components and excellent operability of hand alignment at the time of manufacture and inspection. .

  According to the first aspect of the present invention, a movement (M) for driving the hands (121, 131) is provided inside the housing (20), and the time display is formed by arranging the hands (121, 131). In the radio-controlled timepiece (1) in which the portion (21a) is provided on the front side of the casing (20), the casing (20) is a first casing member (where the time display section (21a) is provided) 21) and a second housing member (22) provided on the back side of the first housing member (21), and the movement (M) includes 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 the minute hand pipe via a minute wheel (140) Hour hand pipe (13) connected to (120) 0), a circuit board (400) for controlling the motor (100), and a case body (300) for supporting the circuit board (400), and the radio wave correction watch (1) is operated on the circuit board (400). A switching element (410) is provided, and one of the gears (111) of the speed reduction mechanism (110) has a groove (111c) for inserting a rotary tool into one end face in the rotation axis direction. The case body (300) includes an opening (301) that exposes the groove (111c), and the minute hand pipe (120) and the hour hand pipe (130) The radio wave correction timepiece (1) can be rotated by operating the groove (111c) using a tool, and the movement (M) is assembled to the first housing member (21). After, before When the second housing member (22) is assembled to the first housing member (21), the switch element (410) is assembled when the second housing member (22) is assembled. Protrudes from a hole (22a) provided in the second casing member (22), and the groove (111c) exposed from the opening (301) covers the second casing member (22). This is a radio-controlled timepiece (1) configured as described above.

  According to the present invention, it is possible to obtain an analog radio-controlled timepiece having a small number of components and excellent operability for hand alignment at the time of manufacture and inspection.

1 is a side sectional view showing an analog radio-controlled timepiece according to an embodiment of the present invention. FIG. 6 is a side cross-sectional view illustrating an analog radio wave correction timepiece (a state where a second housing member is separated) according to an embodiment of the present invention. It is a side sectional view showing a movement concerning an example of the present invention. It is a back view which concerns on the Example of this invention and shows a movement (state except the 1st case member). It is a side sectional view showing an important section of a movement concerning an example 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 analog radio-controlled timepiece 1 shown in FIGS. 1 and 2 is configured as an alarm clock. The radio-controlled timepiece 1 is provided with a movement M for driving hands 121, 131, and 221 inside the housing 20, and a time display unit 21 a including hands 121, 131, and 221 is arranged on the front side of the housing 20. Is provided. In addition, the movement M is provided with a guide mechanism 600 for setting an alarm time. When the wake-up time arrives, the guide mechanism 600 operates to generate a notification sound from a speaker (not shown).

  The housing 20 is formed by assembling a first housing member 21 provided with a time display unit 21 a and a second housing member 22 provided on the back side of the first housing member 21. In the time display unit 21 a, the hands 121, 131, and 221 are driven to rotate at a predetermined speed between the dial and the transparent plate provided on the front surface thereof, and the reference hand 610 is rotated with the operation of the reference mechanism 600. It has become a thing.

  As shown in FIGS. 3 to 6, the movement M of this example includes a first stepping motor 100, a first reduction mechanism 110 including a gear train connected to the first stepping motor 100, and a first reduction mechanism 110. A second hand comprising a connected 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. A reduction mechanism 210, a second hand pipe 220 connected to the second reduction mechanism 210, a circuit board 400 that controls the first stepping motor 100 and the second stepping motor 200, and a case body 300 that supports them. It is.

  Specifically, a minute hand pipe 120 to which the minute hand 121 is attached, an hour hand pipe 130 to which the hour hand 131 is attached, and a second hand pipe 220 to which the second hand 221 is attached 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.

  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 guide mechanism 600 is provided between the case member and the circuit board 400 by screwing a case member for attaching the guide mechanism 600 to the front surface of the second case member 320. The distal ends of the pointer pipes 120, 130, and 220 penetrate the case member for mounting the guide mechanism 600. The guide needle 610 rotates by operating the operation element 620. Specifically, a reference wheel to which the reference hand 610 is attached, an operation element 620 for the user to arbitrarily rotate the reference wheel, a time signal wheel that rotates synchronously with the hour hand pipe 130, and a time signal wheel. And a guide spring provided in the circuit board 400, and the leaf spring is linked to the driving of the hour hand pipe 130. And the reference contact point OFF / ON can be switched. Holes are provided at the key points of the reference car, and the reference cam moves to some extent toward the reference car side once its rotation is inserted into the hole of the reference car once per rotation. When the reference cam moves to the reference vehicle side, a predetermined part of the leaf spring comes into contact with the reference contact, and the reference contact is turned from OFF to ON. Further, the tip of the protrusion is provided with a taper in a predetermined direction, and after the protrusion is immersed in the hole of the reference wheel, the reference cam is detached from the hole when the reference cam rotates to some extent. When the protruding portion comes off the hole, the leaf spring is separated from the reference contact, and the reference contact is turned from ON to OFF. The guide mechanism 600 can be attached to the movement M as necessary.

  The movement M of this example is provided with an antenna 500 for receiving a standard time radio wave in the case body 300 and a receiving circuit for controlling the receiving operation on the circuit board 400. 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 the main points of the movement M. 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.

  The circuit board 400 is provided with a switch element 410 for operating the radio wave correction timepiece 1. The illustrated switch element 410 is a push button type switch whose contact is separated from the conductor pattern of the circuit board 400. Alternatively, it is possible to adopt a slide type switch or a rotary type switch. The function of the switch element 410 is not particularly limited. In this example, the function of the switch element 410 is to operate the generation and stop of the notification sound, or to operate the reception operation of the standard time radio wave.

  Next, the needle alignment in the movement M 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.

  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.

  The radio-controlled timepiece 1 of this example is manufactured by assembling the movement M provided with the guide mechanism 600 to the first casing member 21 and then assembling the second casing member 22 to the first casing member 21. Has become. The movement M is assembled to the first housing member 21 by screwing, and the second housing member 22 is assembled to the first housing member 21 by screwing. The switch element 410 and the operation element 620 pass through the movement M and protrude from the first case member 310 toward the back surface. When the second casing member 22 is assembled, the switch element 410 protrudes from the hole 22a provided at the main part of the second casing member 22, and the groove 111c exposed from the opening 301 is formed in the second casing. Covered by the body member 22. In addition, the operation element 620 of the guide mechanism 600 is exposed from a hole 22 b provided at a main point of the second housing member 22.

  The needle alignment operation at the time of manufacture or inspection is performed by operating the groove 111c exposed from the opening 301 in a state where the movement M is assembled to the first case member 21, that is, a state before the second case member 22 is assembled. To do. The groove 111c may interfere with accurate time display if the user operates it incorrectly. According to this example, the groove 111c is covered with the second housing member 22 when the radio-controlled timepiece 1 is used. Therefore, such inconvenience can be surely prevented. Further, the state of the switch element 410 and the operation element 620 is confirmed according to the needle alignment operation. In the case of this example, since the switch element 410, the operation element 620, and the groove 111c are all located on the same plane, there is an advantage that their operations at the time of manufacturing and inspection are relatively easy. Further, the movement M of this example is not provided with a needle alignment kana. Therefore, there is an advantage that the layout of the switch element 410 has a margin and the design layout is advantageous as compared with the case where the needle alignment kana is provided. If a plurality of switch elements 410 are dense, an operation error may be caused. In this example, such inconvenience can be avoided.

  As described above, the movement of the present example can rotate the minute hand and the hour hand without providing the needle alignment pinion for rotating the minute wheel like the conventional needle alignment mechanism. Further, the position of the minute hand can be adjusted more strictly as compared with the case where the minute wheel is rotated. According to the driving of the first stepping motor, the minute hand pipe follows the first reduction mechanism, and the minute wheel follows the minute hand pipe. In other words, since the minute hand pipe is moved from the driving side, the adjustment accuracy is surely improved as compared with the rotation of the minute wheel on the driven side. That is, this example is extremely rationally configured as an analog radio wave correction timepiece having few components and excellent operability for hand 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 analog radio-controlled timepiece of the present invention can be suitably used as various types of clocks such as an alarm clock, a wall clock, and a table clock.

DESCRIPTION OF SYMBOLS 1 Radio wave correction clock 20 Housing | casing 21 1st housing member 21a Time display part 22 2nd housing member 22a 1st hole part 22b 2nd hole part M Movement 100 1st stepping motor 110 1st deceleration mechanism 111 Groove part is provided Gear 111b Kana 111c Groove 111R Ring surface 120 Minute hand pipe 121 Minute hand 120a Gear section 120b Kana 130 Hour hand pipe 131 Hour hand 130a Gear section 140 Day wheel 140b Kana 200 Second stepping motor 210 Second reduction mechanism 220 Second hand pipe 221 Second hand 220a Gear part 300 Case body 301 Opening part 302 Cylindrical boss part 302R Ring surface 310 First case member 311 Antenna mounting part 320 Second case member 330 Middle plate 400 Circuit board 410 Switch element 500 Antenna 600 Reference machine Structure 610 Reference needle 620 Operator

Claims (1)

In the radio-controlled timepiece in which a movement for driving the hands is provided inside the housing, and a time display unit in which the hands are arranged is provided on the front side of the housing,
The case is formed by assembling a first case member provided with the time display unit and a second case member provided on the back side of the first case member,
The movement includes a motor, a speed reduction mechanism including a gear train connected to the motor, a minute hand pipe connected to the speed reduction mechanism, an hour hand pipe connected to the minute hand pipe via a minute wheel, A circuit board that controls the motor, and a case body that supports them,
The circuit board is provided with a switch element for operating the radio-controlled timepiece,
One of the gears of the speed reduction mechanism is provided with a groove portion for inserting a rotary tool on one end face in the rotation axis direction thereof,
The case body includes an opening that exposes the groove,
The minute hand pipe and the hour hand pipe can be rotated by operating the groove using the rotating tool,
The radio-controlled timepiece is manufactured by assembling the second housing member to the first housing member after the movement is assembled to the first housing member. When the body member is assembled, the switch element protrudes from the hole provided in the second casing member, and the groove exposed from the opening is covered by the second casing member. A radio-controlled watch featuring

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