JP2011007684A - Movement of radio controlled timepiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a movement of a radio controlled timepiece which is reasonably configured to properly retain a reception sensitivity of a standard time radio wave.SOLUTION: This movement of a timepiece includes motors 210, 220, speed reduction mechanisms 310, 320, pointer pipes 410, 420, 430 to which pointers are attached, a circuit board 500 having a drive circuit for controlling the motors provided thereon, and a case 600 for supporting the above components. In the movement of the timepiece, the pointer pipes are driven by the motors via the speed reduction mechanisms. The movement is used for the radio controlled timepiece that receives the standard time radio wave and corrects a display time. The movement includes an antenna 800 for receiving the standard time radio wave, an antenna case 680 to which the antenna is attached, and a support means 690 for supporting the antenna case to the case. The support means is constituted such that a support position of the antenna case to the case is changed so that the interval between the motors and the antenna can be adjusted.

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 5.

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

  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, and the movements used in radio-controlled timepieces have been further improved while taking into account simplification of the structure and improvement in manufacturability. 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.

  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. Furthermore, when different motors and speed reduction mechanisms are used depending on the hand movement method, it is desirable that a common member can be used for the case body of the movement.

  In other words, the case body has compatibility of the second stepping motor and the speed reduction mechanism to cope with step movement and continuous movement, and the antenna position is devised to cope with the noise difference of the second stepping motor. Needed.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a movement of a radio-controlled timepiece that is rationally configured to ensure good reception sensitivity of standard time radio waves.

  The invention described in claim 1 of the present application is a motor, a speed reduction mechanism connected to the motor, a pointer pipe for mounting the pointer, a circuit board provided with a drive circuit for controlling the motor, and supports them. A timepiece movement in which the pointer pipe is driven by the motor via the speed reduction mechanism, and the movement is used for a radio-controlled timepiece that receives a standard time radio wave and corrects its display time. And an antenna for receiving the standard time radio wave, an antenna case for mounting the antenna, and a support means for supporting the antenna case on the case body, wherein the support means is provided for the antenna case with respect to the case body. By changing the support position, the distance between the motor and the antenna can be adjusted. It is a movement of the timepiece.

  The invention described in claim 2 of the present application is the movement of the radio-controlled timepiece according to claim 1, wherein the support means can change a support angle of the antenna case with respect to the case body.

  In the invention described in claim 3 of the present application, in claim 1 or 2, the support means provides a boss on one of the case body and the antenna case, and a plurality of fitting portions on the other of them. The radio-controlled timepiece movement is configured to support the antenna case on the case body by press-fitting and fitting the boss into any of the plurality of fitting portions.

  The invention described in claim 4 of the present application is that, in claim 1 or 2, the support means is provided with a female screw portion in one of the case body and the antenna case, and a plurality of through holes in the other of them. The movement of the radio-controlled timepiece having a configuration in which the case body is supported by the case body by screwing a male screw part inserted into any of the plurality of through holes into the female screw portion.

  According to the present invention, it is possible to obtain a movement of a radio-controlled timepiece that is rationally configured to ensure good reception sensitivity of standard time radio waves.

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. It is a side view which shows the movement of a radio wave correction timepiece concerning the Example of this invention. It is a front view which shows the movement (state which separated the antenna case) of the electromagnetic wave correction timepiece concerning the Example of this invention. It is a side view which shows the movement (state which isolate | separated the antenna case) of the radio wave correction timepiece concerning the Example of this invention. It is explanatory drawing which concerns on the Example of this invention and shows the inside of the movement of a radio wave correction timepiece. It is explanatory drawing which shows the support means which concerns on the Example of this invention and supports an antenna case. It is explanatory drawing which shows the support means which concerns on the Example of this invention and supports an antenna case. It is a front view which concerns on the Example of this invention and shows the movement (state which separated the antenna case) of the radio wave correction timepiece concerning the Example of this invention. It is explanatory drawing which shows the support means which concerns on the Example of this invention and concerns on the Example of this invention, and supports an antenna case. It is explanatory drawing which shows the support means which concerns on the Example of this invention and concerns on the Example of this invention, and supports an antenna case.

  Embodiments of the present invention will be described below with reference to the drawings. The movement 1 of the radio-controlled timepiece of this example shown in FIGS. 1 to 8 is equipped with a plurality of motors 210 and 220, speed reduction mechanisms 310 and 320 comprising gear trains connected to the motors 210 and 220, and hands. The guide pipes 410, 420, and 430, the circuit board 500 provided with a drive circuit for controlling the motors 210 and 220, and the case body 600 that supports them are provided. The guide pipes 410, 420, and 430 are the speed reduction mechanisms 310 and 320. The motor is driven by the motors 210 and 220.

  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 421 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 431 provided at the proximal end portion of the second hand pipe 430. Further, a pinion 422 provided at the proximal end portion of the minute hand pipe 420 is connected to the minute wheel 311, and an hour hand wheel 411 provided at the proximal end portion of the hour hand pipe 410 is a pinion 312 of the minute wheel 311. It is connected with.

  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 730 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. From the detection pattern of the light receiving element 720, each pointer pipe 410, The rotation positions of 420 and 430 are detected.

  In addition, the movement 1 of this example is used for a radio-controlled timepiece that receives a standard time radio wave and corrects its display time, and includes an antenna 800 that receives the standard time radio wave and an antenna case 680 in which the antenna 800 is mounted. And a supporting means 690 for supporting the antenna case 680 on the case body 600. The antenna 800 has a rod shape in which a coil is wound around an iron core, and is configured to be attached to the antenna case 680 by snapping or using an adhesive. The circuit board 500 is provided with a receiving circuit that controls a receiving operation.

  Further, as described later, the support means 690 of the antenna case 680 can adjust the distance between the motors 210 and 220 and the antenna 800 by changing the support position of the antenna case 680 with respect to the case body 600. It has become.

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

  In the case body 600, motors 210 and 220, speed reduction mechanisms 310 and 320, and base ends of pointer pipes 410, 420, and 430 are housed. 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.

  In the movement 1 of this example, a case body 600 is assembled, a circuit board 500 and an antenna case 680 are provided thereto, an antenna 800 is attached to the antenna case 680, and a lead wire of the antenna 800 is soldered to the circuit board 500. After these are electrically connected, the antenna 800 is tuned by operating electronic components of a receiving circuit such as a capacitor mounted on the circuit board 500.

  In the case of this example, after providing the circuit board 500 and the antenna 800 in this way, a guide mechanism 900 is further provided in front of the circuit board 500. The guide mechanism 900 is provided between the third case member 630 and the circuit board 500 by screwing the third case member 630 to the front surface of the second case member 620. The distal ends of the indicator pipes 410, 420, and 430 pass through the third case member 630.

  Although the specific configuration of the guide mechanism 900 is not particularly limited, in the case of this example, a reference wheel 910 that is arbitrarily rotated by a user with an operating means (not shown) and a time signal wheel that rotates in synchronization with the hour hand pipe 410. 920, a reference cam 930 that follows the hour transmission wheel 920, a plate spring 940 having a predetermined shape that biases the reference cam 930 toward the reference wheel 910, and a reference contact 950 provided on the circuit board 500, The leaf spring 940 is separated from the reference contact 950 in conjunction with the driving of the hour hand pipe 410, and the OFF / ON of the reference contact 950 is switched.

  A hole 911 is provided at a key point of the reference wheel 910, and the reference cam 930 is inserted into the hole 911 of the reference wheel 910 once per rotation, so that the reference wheel 910 is moved toward the reference wheel 910. Move to some extent. When the reference cam 930 moves to the reference wheel 910 side, a predetermined part of the leaf spring 940 comes into contact with the reference contact 950, and the reference contact 950 turns from OFF to ON. Further, the tip of the protrusion 931 is provided with a taper of a predetermined direction. The protrusion 931 is inserted into the hole 911 of the reference wheel 910 and then the reference cam 930 is rotated to some extent. Escape from 911. When the protrusion 931 is detached from the hole 911, the leaf spring 940 is separated from the reference contact 950, and the reference contact 950 is turned from ON to OFF. The guide mechanism 900 can be attached as necessary.

  Next, the antenna case 680 and its support means 690 will be described in detail. As shown in FIG. 7, the support means 690 of this example is provided with a boss 691 on one of the case body 600 and the antenna case 680 and a plurality of fitting portions 692 on the other of them, and a plurality of fitting portions 692. The antenna case 680 is supported on the case body 600 by press-fitting and fitting the boss 691 into any of the above. That is, the distance between the motors 210 and 220 and the antenna 800 can be adjusted by selecting the fitting portion 692 into which the boss 691 is press-fitted.

  In the illustrated supporting means 690, a plurality of first wall portions 693 extending to the antenna case 680 side are provided on the first case member 610, and a second wall portion 694 extending to the first case member 610 side is provided on the antenna case 680. Are provided, and each first wall 693 is provided with a boss 691 and each second wall 694 is provided with a plurality of fitting parts 692. The second wall portion 694 is provided with a guide groove 695 that guides the boss 691 to the fitting portion 692. The first wall portion 693 and the second wall portion 694 are provided at an interval in the flat direction of the case body 600. The antenna case 680 is supported by the case body 600 by press-fitting a boss 691 into a predetermined fitting portion 692 while overlapping the first wall portion 693 and the second wall portion 694. The fitting portion 692 is provided vertically and forward and backward as viewed from the front of the case body 600, and the support position of the antenna case 680 is moved vertically and forward and backward by the fitting portion 692 into which the boss 691 is press-fitted.

  According to such a configuration, it is possible to ensure good reception sensitivity of standard time radio waves. The concept will be described below.

  As the second stepping motor 220 and the second reduction mechanism 320, different ones are used depending on the second hand moving method. For the case body 600, it is desirable that a common member can be used. The first case member 610, the second case member 620, and the unevenness, the boss, the support shaft, and the like formed on the intermediate plate 601 may be provided with a second stepping motor 220 and a second speed reduction mechanism 320, respectively, having different hand movement methods. Pre-designed to be possible.

  As a method of moving the second stepping motor 220, there are a step moving and a continuous moving. In the case of step movement, since the influence of noise is relatively small, the distance between the second stepping motor 220 and the antenna 800 may be short. Therefore, an unnecessary increase in size is avoided by adjusting the distance between the second stepping motor 220 and the antenna 800 to be short.

  On the other hand, 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 220 and the antenna 800 is short, reception of standard time radio waves may not be realized. Therefore, by adjusting the interval between the second stepping motor 220 and the antenna 800 to be long, the reception sensitivity of the standard time radio wave is ensured satisfactorily.

  As a method of moving the hand, there is also a method of intermittently supplying a pulse current 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, since the influence of noise becomes equal to or greater than that of continuous hand movement, the interval between the second stepping motor 220 and the antenna 800 is adjusted to be long.

  As described above, the influence of noise depends on the second stepping motor 220 to be used and the moving method of the second stepping motor 220. In this example, this can be appropriately dealt with by changing the support position of the antenna case.

  As shown in FIG. 8, the support means 690 can change the support angle of the antenna case 680 with respect to the case body 600 by rotating the antenna case 680 about the boss 691. . This is a device for improving the degree of freedom of layout inside the casing of the watch.

  The watch case has various shapes and sizes, and the movement 1 provided inside the case becomes more versatile by making it possible to change the support angle of the antenna case 680 in this way. . For example, the antenna case 680 supported in the flat direction of the case body 600 is advantageous for a thin wall clock, and the antenna case 680 supported in the thickness direction of the case body 600 is a box-shaped alarm clock. It is advantageous.

  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.

  Next, a second embodiment of this example will be described. As shown in FIG. 9 and FIG. 10, the support means 690 of this example is provided with a female threaded portion 696 on one of the case body 600 and the antenna case 680 and a plurality of through holes 697 on the other of them to provide a plurality of through holes. The antenna case 680 is supported by the case body 600 by screwing the male screw part 698 inserted into any of the holes 697 into the female screw part 696. That is, the distance between the motors 210 and 220 and the antenna 800 can be adjusted by selecting the through hole 697 through which the male screw component 698 is inserted.

  The illustrated supporting means 690 is provided with a female thread portion 696 in each first wall portion 693 and a plurality of through holes 697 in each second wall portion 694. The antenna case 680 is supported by the case body 600 by screwing a male screw part 698 inserted into a predetermined through hole 697 into the female screw part 696 while overlapping the first wall part 693 and the second wall part 694. The through holes 697 are provided in the vertical and front / rear directions as viewed from the front of the case body 600, and the support position of the antenna case 680 is moved in the vertical and front / back directions by the through holes 697 through which the male screw component 698 is inserted.

  Further, as shown in FIG. 11, the support means 690 can change the support angle of the antenna case 680 with respect to the case body 600 by rotating the antenna case 680 around the male screw part 698. Yes.

  As described above, the antenna case 680 may be screwed to the case body 600.

  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 wave correction watch 210 1st stepping motor 220 2nd stepping motor 310 1st reduction mechanism 311 Sun reverse wheel 312 Kana 320 2nd reduction mechanism 410 Hour hand pipe 411 Hour hand wheel 420 Minute hand pipe 421 Minute hand wheel 422 Kana 430 Second hand pipe 431 Second hand wheel 500 Circuit board 600 Case body 601 Middle plate 610 First case member 620 Second case member 630 Third case member 680 Antenna case 690 Support means 691 Boss 692 Fitting portion 693 First wall portion 694 Second wall portion 695 Guide groove 696 Female thread portion 697 Through hole 698 Male thread component 700 Position detection means 710 Light emitting element 720 Light receiving element 730 Translucent portion 800 Antenna 900 Reference mechanism 910 Reference wheel 911 Hole 920 Time transmission wheel 930 Reference cam 9 First protrusion 940 leaf spring 950 guide contact

Claims (4)

A motor, a speed reduction mechanism connected to the motor, a pointer pipe for mounting a pointer, a circuit board provided with a drive circuit for controlling the motor, and a case body for supporting them; In the movement of a watch driven by the motor via a speed reduction mechanism,
The movement is used for a radio-controlled timepiece that receives a standard time radio wave and corrects its display time, and includes an antenna that receives the standard time radio wave, an antenna case to which the antenna is attached, and the case body A support means for supporting the antenna case,
The movement of the radio-controlled timepiece according to claim 1, wherein the support means can adjust a distance between the motor and the antenna by changing a support position of the antenna case with respect to the case body.   The movement of the radio-controlled timepiece according to claim 1, wherein the supporting means can change a support angle of the antenna case with respect to the case body.   The support means includes a boss provided on one of the case body and the antenna case, and a plurality of fitting portions provided on the other of them, and the boss is press-fitted into one of the plurality of fitting portions to be fitted. The movement of the radio-controlled timepiece according to claim 1, wherein the antenna case is supported by the case body.   The support means is provided with a female screw part in one of the case body and the antenna case, and provided with a plurality of through holes in the other of the case body and a male screw part inserted through any of the plurality of through holes in the female screw part. The movement of the radio-controlled timepiece according to claim 1 or 2, wherein the antenna case is supported by the case body by being screwed together.

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