JP5331064B2 - Radio correction watch movement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a movement of a radio-controlled timepiece that ensures excellent receiver sensitivity to a standard time radio wave, and that achieves a rationalized layout of components. <P>SOLUTION: A case body 600 of a movement 1 is an assembly of a first case component 610 on its rear side and a second case component 620 on its front side. The first case component includes an antenna mounting part 611 on a portion, which projects from a side of the second case component when the case body is seen from the front side. A circuit substrate 500 is mounted on a front face of the second case component, and includes an extension part 510 which extends from the front face of the second case component toward the antenna mounting part. Between the second case component and the antenna mounting part is a hollow portion 600a which is sandwiched and formed between the first case component and the extension part in a thickness direction of the case body. In the hollow portion, electronic elements 503 and 504 mounted on the extension part are positioned. Further, in the hollow portion, a magnetic shield 900 is provided. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a movement for driving a pointer, and in particular, is used for an analog type radio-controlled timepiece.

  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. A drive circuit for controlling the motor is provided in the case body of the movement. The motor is controlled based on a program set in the drive circuit. This type of movement is also disclosed in Patent Documents 1 to 6.

JP-A-7-198871 Japanese Patent Laid-Open No. 10-123266 Japanese Patent Laid-Open No. 2001-42060 JP 2007-132822 A JP 2008-241538 A JP 2010-38582 A

  In recent years, the forms of timepieces have been increasingly diversified, and the movement of the timepiece is also required to be improved in versatility so as to be compatible with various types of timepieces. In particular, the use of radio-controlled timepieces that receive standard-time radio waves and correct their display times has become widespread. Ingenuity is required.

  When the antenna is provided in the movement, attention should be paid to the influence of motor noise on the antenna. Since the magnetic field generated by the motor becomes noise and decreases the reception sensitivity of the antenna, it is desirable that the distance between the motor and the antenna is large. However, as a movement provided in the timepiece, there is a demand for miniaturization as much as possible, and the arrangement of antennas is an important problem.

  The movement of the radio-controlled timepiece is provided with switches for operating the reception operation, a light emitting element for displaying the reception state, and the like. When such an electronic element is mounted on a circuit board, it is considered that design ingenuity is required to effectively use the internal space in order to reduce the size of the movement.

  The present invention has been made in view of such circumstances, and an object of the present invention is to obtain a movement of a radio-controlled timepiece that ensures good reception sensitivity of standard time radio waves and rationalizes the layout of components. .

  The invention described in claim 1 of the present application is a movement of a radio-controlled timepiece that receives a standard time radio wave and corrects a display time. The movement is equipped with a motor, a speed reduction mechanism connected to the motor, and a pointer. A guide pipe, an antenna for receiving the standard time radio wave, a drive circuit for controlling the motor, a circuit board provided with a reception circuit for controlling the reception operation, and a case body for supporting them, The pointer pipe is driven by the motor via the speed reduction mechanism, and the case body is a flat type formed by assembling a first case member on the back side and a second case member on the front side in the thickness direction. The case body is provided with a base end portion of the motor, the speed reduction mechanism, and the pointer pipe, and the first case member is provided on the front side of the case body. The antenna mounting portion for mounting the antenna is provided at a portion protruding to the side portion of the second case member as viewed from the front, and the tip end portion of the pointer pipe is located on the front side from the second case member. The circuit board is mounted on the front surface of the second case member and has an extending portion extending from the front surface of the second case member toward the antenna mounting portion. And a hollow portion sandwiched in the thickness direction of the case body by the first case member and the extending portion is formed between the second case member and the antenna mounting portion. The movement of the radio-controlled timepiece having a configuration in which the electronic element mounted on the extension portion is positioned in the hollow portion.

  The invention described in claim 2 of the present application is the movement of the radio-controlled timepiece according to claim 1, wherein the electronic element is a push button switch.

  The invention described in claim 3 of the present application is the movement of the radio-controlled timepiece according to claim 1, wherein the electronic element is a light emitting element.

  The invention described in claim 4 of the present application is the movement of the radio-controlled timepiece according to claim 1, wherein the hollow portion is provided with a magnetic shield.

  The invention described in claim 5 of the present application is a movement of a radio-controlled timepiece that receives a standard time radio wave and corrects a display time. The movement is equipped with a motor, a speed reduction mechanism connected to the motor, and a pointer. A guide pipe, an antenna for receiving the standard time radio wave, a drive circuit for controlling the motor, a circuit board provided with a reception circuit for controlling the reception operation, and a case body for supporting them, The pointer pipe is driven by the motor via the speed reduction mechanism, and the case body is a flat type formed by assembling a first case member on the back side and a second case member on the front side in the thickness direction. The case body is provided with a base end portion of the motor, the speed reduction mechanism, and the pointer pipe, and the first case member is provided on the front side of the case body. The antenna mounting portion for mounting the antenna is provided at a portion protruding to the side portion of the second case member as viewed from the front, and the tip end portion of the pointer pipe is located on the front side from the second case member. The circuit board is mounted on the front surface of the second case member and has an extending portion extending from the front surface of the second case member toward the antenna mounting portion. And a hollow portion sandwiched in the thickness direction of the case body by the first case member and the extending portion is formed between the second case member and the antenna mounting portion. The movement of a radio-controlled timepiece having a structure in which a magnetic shield is provided in the hollow portion.

  According to the present invention, it is possible to obtain a movement of a radio-controlled timepiece that ensures good reception sensitivity of standard time radio waves and rationalizes the layout of components.

FIG. 4 is a front view showing a movement of the radio-controlled timepiece according to the embodiment of the present invention. FIG. 6 is a rear view showing the movement of the radio-controlled timepiece according to the embodiment of the present invention. FIG. 6 is a side sectional view (XX sectional view of FIG. 2) showing the movement of the radio-controlled timepiece according to the embodiment of the present invention. FIG. 4 is a side cross-sectional view (enlarged view of main parts in FIG. 3) showing the main parts of the movement of the radio-controlled timepiece according to the embodiment of the present invention. FIG. 4 is a side cross-sectional view (a YY cross-sectional view of FIG. 2) showing a movement of the radio-controlled timepiece according to the embodiment of the present invention. FIG. 6 is a side cross-sectional view (enlarged view of main parts in FIG. 5) showing the main part of the movement of the radio-controlled timepiece according to the embodiment of the present invention. It is a rear view which concerns on the Example of this invention and shows a 2nd case member and a circuit board. It is a side view which concerns on the Example of this invention and shows a 2nd case member and a circuit board. FIG. 6 is a side sectional view (XX sectional view of FIG. 2) showing a movement of a radio-controlled timepiece in which a magnetic shield is provided in a hollow portion according to the embodiment of the present invention.

  Embodiments of the present invention will be described below with reference to the drawings. The movement 1 of this example shown in FIGS. 1 to 8 is used for an analog radio wave correction watch that receives a standard time radio wave and corrects a display time.

  The movement 1 includes a plurality of motors 210 and 220, speed reduction mechanisms 310 and 320 including gear trains connected to the motors 210 and 220, needle pipes 410, 420, and 430 for attaching the hands, and standard time radio waves. An antenna 800 for receiving, a circuit board 500 provided with a driving circuit for controlling each of the motors 210 and 220 and a receiving circuit for controlling the receiving operation, and a case body 600 for supporting them are provided, and the indicator pipes 410 and 420 are provided. , 430 are driven by the motors 210, 220 via the speed reduction mechanisms 310, 320.

  Specifically, an hour hand pipe 410 for attaching an hour hand, a minute hand pipe 420 for attaching a minute hand, and a second hand pipe 430 for attaching a second hand are provided concentrically. The second hand pipe 430 positioned at the center may not be a pipe-shaped member. The illustrated second hand pipe 430 is a shaft-shaped member.

  A first speed reduction mechanism 310 connected to the first stepping motor 210 is connected to a minute hand wheel provided at a proximal end portion of the minute hand pipe 420. A second speed reduction mechanism 320 connected to the second stepping motor 220 is connected to a second hand wheel provided at the proximal end portion of the second hand pipe 430. Further, the pinion provided at the base end portion of the minute hand pipe 420 is connected to the minute wheel, and the hour hand wheel provided at the base end portion of the hour hand pipe 410 is connected to the pinion of the minute wheel. .

  The hour hand pipe 410 and the minute hand pipe 420 are driven to rotate at a predetermined speed by the first stepping motor 210, and the second hand pipe 430 is driven to rotate at a predetermined speed by the second stepping motor.

  Incidentally, reference numeral 700 in the figure denotes a position detecting means comprising a light emitting element 710 and a light receiving element 720. A light transmitting portion that transmits the light of the light emitting element 710 is provided at the main part of the driving member located between the light emitting element 710 and the light receiving element 720, and the indicator pipes 410 and 420 are detected from the detection pattern of the light receiving element 720. , 430 is detected.

  The case body 600 of this example is a flat type in which a first case member 610 on the back side and a second case member 620 on the front side are assembled in the thickness direction. Between the first case member 610 and the second case member 620, an intermediate plate 601 on which the stators of the motors 210 and 220 are mounted is provided.

  Inside the case body 600, that is, between the first case member 610 and the second case member 620, motors 210 and 220, speed reduction mechanisms 310 and 320, and base end portions of pointer pipes 410, 420, and 430 are provided. ing. 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 610, the second case member 620, and the intermediate plate 601. The distal ends of the pointer pipes 410, 420, and 430 protrude from the second case member 620 toward the front. The first case member 610 and the second case member 620 are screwed together. The circuit board 500 is mounted on the front surface of the second case member 620 by screwing. The circuit board 500 is provided with holes through which the guide pipes 410, 420, and 430 are inserted.

  The first case member 610 is integrally provided with an antenna mounting portion 611 that mounts the antenna 800 at a portion protruding to the side portion of the second case member 620 when viewed from the front side of the case body 600. Moreover, the second case member 620 is integrally provided with a battery box 621 that houses a power battery. The battery box 621 is located on the opposite side of the antenna mounting portion 611 when viewed from the front side of the case body 600.

  The antenna mounting portion 611 has a box shape with an opening on the front side, and a snap 611a for fixing an end portion of the antenna 800 is provided therein. The antenna 800 is a rod-shaped member formed by winding a coil around an iron core, and is configured to be snapped to the antenna mounting portion 611. Or you may comprise so that it may fix and attach with an adhesive agent. The circuit board 500 is provided with a receiving circuit for controlling the receiving operation by the antenna 800.

  In this movement 1, the circuit board 500 is mounted on the second case member 620, the first case member 610 is mounted on the second case member 620, the antenna 800 is mounted on the antenna mounting portion 611, and the lead wire of the antenna 800 is connected. The circuit board 500 is manufactured by soldering.

  Further, the circuit board 500 of the present example is mounted on the front surface of the second case member 620 and includes an extending portion 510 that extends from the front surface of the second case member 620 to the antenna mounting portion 611 side. It has become.

  Between the second case member 620 and the antenna mounting portion 611, a hollow portion 600a sandwiched between the first case member 610 and the extending portion 510 in the thickness direction of the case body is formed, and a circuit board is formed. The electronic elements 503 and 504 mounted on the extending portion 510 of the 500 are configured to be positioned in the hollow portion 600a.

  In the case of this example, a first push button switch 501, a second push button switch 502, and a third push button switch 503 are provided as electronic operating means of the movement 1. These push button switches 501, 502, and 503 are electronic elements mounted on the circuit board 500, and flexible portions 501a, 502a, and 503a that support moving contacts with respect to the circuit board 500 at a predetermined interval; Rod-like operation portions 501b, 502b, and 503b for operating the flexible portion, and when the operation portions 501b, 502b, and 503b are pushed toward the circuit board 500, the moving contact and the contact provided on the circuit board 500 are It is in contact.

  The function of each switch is not particularly limited, but when the first push button switch 501 is pressed, the display time is reset by the pointer, and when the second push button switch 502 is pressed, the standard time radio wave is forcibly received. When the third push button switch 503 is pressed, the reception state of the standard time radio wave is confirmed.

  In addition, a light emitting element 504 is provided as display means for displaying the reception state of the standard time radio wave. An LED is used as the light emitting element 504. The light emitting element 504 is an electronic element mounted on the circuit board 500, and lights up when a standard time radio wave can be received when the third push button switch 503 is pressed. That is, the movement 1 of this example can confirm the reception sensitivity at the place where the watch is installed.

  The first push button switch 501, the second push button switch 502, the third push button switch 503, and the light emitting element 504 are exposed on the back side of the case body 600.

  The first push button type switch 501 and the second push button type switch 502 are located between the first case member 610 and the second case member 620. At the main points of the first case member 610 and the second case member 620, through-type cylindrical bosses 610a and 620a for guiding the operation portions 501b and 502b of the push button switches 501 and 502 are provided, respectively. The operation portions 501b and 502b of the first push button type switch 501 and the second push button type switch 502 are retained by a cylindrical boss 620a provided on the second case member 620.

  Among the electronic elements mounted on the circuit board 500, the third push button switch 503 and the light emitting element 504 are located in the hollow portion 600a. A penetrating cylindrical boss 610 b that guides the operation portion 503 b of the third push button switch 503 is provided at a key point of the first case member 610. The operation portion 503 b of the third push button switch 503 is prevented from being detached by a cylindrical boss 610 b provided on the first case member 610. In addition, a penetrating cylindrical boss 610 c that holds the light emitting element 504 is provided at a point of the first case member 610.

  The first push button switch 501 and the second push button switch 502 are supported with respect to the circuit board 500 by attaching the circuit board 500 to the second case member 620. The third push button switch 503 is supported with respect to the circuit board 500 by assembling the first case member 610 to the second case member 620 with the circuit board 500 mounted thereon. In the case where a plurality of push button switches 501, 502, 503 are mounted on a substrate, the assembling work becomes relatively easy if the steps are distributed in this way.

  According to the configuration of this example, the movement of the radio-controlled timepiece can be configured extremely rationally. The concept will be described below.

  In general, this type of movement includes a first stepping motor that drives the hour and minute hands and a second stepping motor that drives the second hand, and the noise of the second stepping motor is far greater than the noise of the first stepping motor. large. Therefore, it is necessary to consider the distance between the second stepping motor and the antenna. Further, the noise of the second stepping motor depends on the hand movement method. As a method of moving the second stepping motor, there are known a step moving method, that is, a method of supplying one pulse current per second, and a continuous moving method, that is, a method of continuously supplying a pulse current at an interval shorter than 1 second. The noise is larger in the case of continuous movement than in step movement. Further, as a method of moving the hand, there is also a method of supplying a pulse current intermittently at intervals of 1 second. For example, the current supply time per second is 0.5 seconds, and the number of pulses in that 0.5 second is 16. According to such a driving method, the second hand stops every second like the step hand movement, but the movement of the second hand becomes smoother and more beautiful than the step hand movement. However, the influence of noise is equal to or greater than that of continuous hand movement.

  Now, different motors and speed reduction mechanisms are used depending on the hand movement method, and the case body of the movement is designed in advance so that a second stepping motor and a second speed reduction mechanism with different hand movement methods can be provided. Thus, it is desirable to be able to use a common member.

  Here, in the case of continuous hand movement, the influence of noise is far greater than that of step hand movement. Therefore, if the distance between the second stepping motor and the antenna is short, reception of standard time radio waves may not be realized. Therefore, when the antenna mounting portion is provided in the case body, it is necessary to secure a sufficient distance between the second stepping motor and the antenna in consideration of the influence of noise in the case of continuous hand movement. If the interval is set wide, it is possible to cope with any of the hand movement methods. However, an increase in the size of the case body is inevitable, and there is a space in the interior.

  Therefore, the inventor of the present application intensively studied to effectively use the internal space of the case body, and achieved the present invention. That is, a hollow portion sandwiched between the first case member and the extension portion in the thickness direction of the case body is formed between the second case member and the antenna mounting portion, and is mounted on the extension portion. The electronic element was positioned in the hollow part.

  The movement of radio-controlled timepieces is accompanied by the addition or change of electronic elements to be mounted on the substrate in accordance with the increase in functionality and change in function. In this regard, the movement of this example can easily add or change an electronic element using the hollow portion by securing the hollow portion between the second case member and the antenna mounting portion. It has become a thing. In particular, at the design site of the movement, when a new function is added, the arrangement position of the electronic element mounted on the substrate may be a problem. The configuration of this example is very advantageous in terms of versatility when designing a movement.

  As described above, the movement of this example is extremely rationally configured as a movement of a radio-controlled timepiece. 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.

  In particular, as shown in FIG. 9, a magnetic shield 900 may be provided in the hollow portion 600a. As the magnetic shield 900, a sheet provided with metal ink is adopted, and this may be attached to the wall surface of the hollow portion. Alternatively, a sheet metal, a metal mesh, a foam metal, or the like may be disposed. According to such a configuration, it is possible to more reliably avoid magnetic field noise generated by the motors 210 and 220 when receiving standard time radio waves. This is effective when the motors 210 and 220 having a strong magnetic field are used.

  The movement of the radio-controlled timepiece according to the present invention can be used very suitably as a unit constituting a time display unit of an analog wall clock or an alarm clock.

DESCRIPTION OF SYMBOLS 1 Movement of radio correction timepiece 210 First stepping motor 220 Second stepping motor 310 First reduction mechanism 320 Second reduction mechanism 410 Hour hand pipe 420 Minute hand pipe 430 Second hand pipe 500 Circuit board 501 First push button type switch 501a Flexible portion 501b Operation part 502 2nd push button type switch 502a Flexible part 502b Operation part 503 3rd push button type switch 503a Flexible part 503b Operation part 504 Light emitting element 510 Extension part 600 Case body 600a Hollow part 601 Middle plate 610 First case member 610a Cylindrical boss 610b Cylindrical boss 610c Cylindrical boss 611 Antenna mounting portion 611a Snap 620 Second case member 620a Cylindrical boss 621 Battery box 700 Position detection means 710 Light emitting element 72 The light-receiving element 800 antenna 900 magnetic shield

Claims (5)

In the movement of the radio correction clock that receives the standard time radio wave and corrects the display time,
The movement controls a motor, a speed reduction mechanism connected to the motor, a pointer pipe for mounting a pointer, an antenna for receiving the standard time radio wave, a driving circuit for controlling the motor, and the receiving operation. A circuit board provided with a receiving circuit, and a case body that supports them, the pointer pipe is driven by the motor through the speed reduction mechanism,
The case body is a flat type formed by assembling the first case member on the back side and the second case member on the front side in the thickness direction,
In the case body, the motor, the speed reduction mechanism, and the base end of the pointer pipe are provided,
The first case member includes an antenna mounting portion that mounts the antenna on a portion that protrudes from a side portion of the second case member when viewed from the front side of the case body.
The tip of the pointer pipe protrudes from the second case member toward the front,
The circuit board is mounted on the front surface of the second case member, and includes an extending portion that extends from the front surface of the second case member toward the antenna mounting portion.
Between the second case member and the antenna mounting portion, a hollow portion sandwiched in the thickness direction of the case body at the first case member and the extending portion is formed,
A movement of a radio-controlled timepiece, wherein an electronic element mounted on the extension portion is positioned in the hollow portion.   The movement of a radio-controlled timepiece according to claim 1, wherein the electronic element is a push button type switch.   The movement of the radio-controlled timepiece according to claim 1, wherein the electronic element is a light emitting element.   The movement of the radio-controlled timepiece according to claim 1, wherein a magnetic shield is provided in the hollow portion. In the movement of the radio correction clock that receives the standard time radio wave and corrects the display time,
The movement controls a motor, a speed reduction mechanism connected to the motor, a pointer pipe for mounting a pointer, an antenna for receiving the standard time radio wave, a driving circuit for controlling the motor, and the receiving operation. A circuit board provided with a receiving circuit, and a case body that supports them, the pointer pipe is driven by the motor through the speed reduction mechanism,
The case body is a flat type formed by assembling the first case member on the back side and the second case member on the front side in the thickness direction,
In the case body, the motor, the speed reduction mechanism, and the base end of the pointer pipe are provided,
The first case member includes an antenna mounting portion that mounts the antenna on a portion that protrudes from a side portion of the second case member when viewed from the front side of the case body.
The tip of the pointer pipe protrudes from the second case member toward the front,
The circuit board is mounted on the front surface of the second case member, and includes an extending portion that extends from the front surface of the second case member toward the antenna mounting portion.
Between the second case member and the antenna mounting portion, a hollow portion sandwiched in the thickness direction of the case body at the first case member and the extending portion is formed,
A movement of a radio-controlled timepiece, wherein a magnetic shield is provided in the hollow portion.

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