JP5142286B2 - Radio correction watch movement - Google Patents

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 4.
JP-A-7-198871 Japanese Patent Laid-Open No. 10-123266 Japanese Patent Laid-Open No. 2001-42060 JP 2007-132822 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 a case body provided with an antenna for receiving the standard time radio wave, and provided with a first antenna mounting portion on which the antenna can be mounted on a side portion of the case body, and the first antenna mounting portion. An auxiliary case member can be connected to the outside of the side portion, and the auxiliary case member is provided with a second antenna mounting portion on which the antenna can be mounted. The antenna is attached to the first antenna attachment portion, or the auxiliary case member is connected to the case body and attached to the second antenna attachment portion, and the antenna is attached to the second antenna attachment portion. In this case, the movement of the radio-controlled timepiece is configured such that the distance between the motor and the antenna is larger than when the antenna is mounted on the first antenna mounting 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.

  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 6 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.

  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. The movement 1 includes an antenna 800 that receives the standard time radio wave and controls the reception operation. A receiving circuit is provided on the circuit board 500.

  A side portion of the case body 600 is provided with a first antenna mounting portion 611 that allows the antenna 800 to be mounted. The antenna 800 is a rod-shaped member formed by winding a coil around an iron core. Further, an auxiliary case member 690 can be connected to the outside of the side portion of the case body 600 provided with the first antenna mounting portion 611, and the second antenna mounting portion in which the antenna 800 can be mounted on the auxiliary case member 690. 691 is provided. The antenna 800 is configured to be mounted on the first antenna mounting portion 611 or mounted on the second antenna mounting portion 691 by connecting an auxiliary case member 690 to the case body 600.

  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.

  The first case member 610 is integrally provided with a first antenna mounting portion 611 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. The first antenna mounting portion 611 has a box shape with an opening on the front side, and a snap 612 for fixing an end portion of the antenna 800 is provided therein.

  The auxiliary case member 690 is connected to the first antenna mounting portion 611 by screwing. In the case of this example, the case body 600 is connected in the flat direction. The second antenna mounting portion 691 has a box shape having an opening on the front side, and a snap 692 for fixing an end portion of the antenna 800 is provided therein.

  The auxiliary case member 690 is provided with a female screw part 693 for screwing the male screw part B, and the first antenna mounting part 611 is provided with a through hole 613 for inserting the male screw part B. The auxiliary case member 690 is screwed by screwing the male screw part B inserted through the through hole 613 into the female screw part 693. The female screw portion 693 is a convex portion (two locations in the illustrated example) that protrudes to the inside of the first antenna mounting portion 611, and the male screw component B is inserted into the through hole 613 from the back side of the first case member 610. The case body 600 is screwed in the thickness direction.

  In the movement 1 of this example, the case body 600 is assembled, the circuit board 500 and the antenna 800 are mounted, the lead wires 801 of the antenna 800 are soldered to the circuit board 500 and electrically connected to each other, and then the circuit board is mounted. The antenna 800 is tuned by operating electronic components of a receiving circuit such as a capacitor mounted on the antenna 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 first antenna mounting portion 611 and the second antenna mounting portion 691 will be described in detail. FIG. 1 shows a case where the auxiliary case member 690 is connected and the antenna 800 is mounted on the second antenna mounting portion 691. FIG. 6 shows a case where the antenna 800 is mounted on the first antenna mounting portion 611 without connecting the auxiliary case member 690.

  When the antenna 800 is mounted on the second antenna mounting portion 691, the distance between the motors 210 and 220 and the antenna 800 is configured to be larger than when the antenna 800 is mounted on the first antenna mounting portion 611. . According to such a configuration, it is possible to ensure good reception sensitivity of the standard time radio wave by changing the position of the antenna 800 according to the difference in noise of the second stepping motor 220 to be used. 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 antenna 800 is attached to the first antenna attachment portion 611 (see FIG. 6). Since the auxiliary case member 690 does not need to be connected, an unnecessary increase in size is not caused. 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 antenna 800 is attached to the first antenna attachment portion 611, reception of standard time radio waves may not be realized. Therefore, the auxiliary case member 690 is connected and the antenna 800 is mounted on the second antenna mounting portion 691 (see FIG. 1). Since the distance between the second stepping motor 220 and the antenna 800 is increased, it is possible to ensure good reception sensitivity of standard time radio waves.

  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 is equal to or greater than that of continuous hand movement, the antenna 800 is mounted on the second antenna mounting portion 691.

  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, the example which changed the auxiliary | assistant case member 690 about the Example mentioned above is demonstrated. As shown in FIGS. 7 to 10, the auxiliary case member 690 is connected in the thickness direction of the case body 600. The second antenna mounting portion 691 has a box shape with an opening on the back side, and a snap 692 for fixing the end portion of the antenna 800 is provided therein.

  The auxiliary case member 690 is provided with a female screw part 694 for screwing the male screw part B, and the first antenna mounting part 611 is provided with a through hole 613 for inserting the male screw part B. The through hole 613 is the same as that in the above-described embodiment. The auxiliary case member 690 is screwed by screwing the male screw part B inserted through the through hole 613 into the female screw part 694. The female screw part 694 is a convex part (two places in the example) projecting from the back side of the first case member 610 toward the through hole 613 of the first antenna mounting part 611. One case member 610 is inserted into the through hole 613 from the front side, and is screwed in the thickness direction of the case body 600.

  The lead wire 801 of the antenna 800 is inserted into a lead wire insertion hole 614 provided at a main point of the first antenna mounting portion 611 and brought to the front side of the first antenna mounting portion 611, and is soldered to the circuit board 500. Has been. A pipe portion 695 extending from the main point of the second antenna mounting portion 691 is provided at the main point of the auxiliary case member 690, and the tip of the pipe portion 695 is connected to the lead wire insertion hole 614. . The lead wire 801 is inserted into the lead wire insertion hole 614 through the tip of the lead wire 801 through the pipe portion 695.

  As described above, the auxiliary case member 690 may be configured to be connected in the thickness direction of the case body 600. The watch case has various shapes and sizes, and the movement 1 provided inside the case improves the degree of freedom of layout inside the case by changing the connection direction of the auxiliary case member 690. be able to. For example, connecting the auxiliary case member 690 in the flat direction of the case body 600 is advantageous for a thin wall clock, and connecting the auxiliary case member 690 in the thickness direction of the case body 600 is a box-shaped alarm. It is advantageous for watches.

  Next, molding of the auxiliary case member 690 will be described. The auxiliary case member 690 is a resin injection molding member. The position of the female thread portions 693 and 694 and the presence or absence of the pipe portion 695 differ between the case body 600 connected in the flat direction and the case body 600 connected in the thickness direction.

  Therefore, the mold used for injection molding has a molded portion of each female screw portion 693, 694 and a pipe portion 695, and a structure in which a nest is inserted into these molded portions according to the shape of the auxiliary case member 690 to be molded. To do.

  According to such a configuration, by exchanging the insert, the auxiliary case member connected in the flat direction of the case body 600 and the auxiliary case member connected in the thickness direction can be formed by one mold.

  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.

It is a front view which shows the movement (state which connected the auxiliary case member) of the electromagnetic wave correction timepiece concerning the Example of this invention. It is a back view which shows the movement (state which connected the auxiliary case member) 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 internal structure of a case body. It is a perspective view from the front upper right which shows the 1st case member and auxiliary case member concerning the example of the present invention. It is a side sectional view showing a 1st case member and an auxiliary case member concerning an example of the present invention. It is a front view which shows the movement (state which has not connected the auxiliary case member) of a radio wave correction timepiece concerning the Example of this invention. It is a front view which shows the movement (state which connected the auxiliary case member) of the electromagnetic wave correction timepiece concerning the Example of this invention. It is a back view which shows the movement (state which connected the auxiliary case member) of the radio wave correction timepiece concerning the Example of this invention. It is a perspective view from the back upper right which shows the 1st case member and auxiliary case member concerning the example of the present invention. It is a side sectional view showing a 1st case member and an auxiliary case member concerning an example of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Movement 210 1st stepping motor 220 2nd stepping motor 310 1st speed reduction mechanism 311 Sun reverse wheel 312 Kana 320 2nd speed 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 611 First antenna mounting portion 612 Snap 613 Through hole 614 Lead wire insertion hole 620 Second case member 630 Third case member 690 Auxiliary case member 691 Second antenna mounting portion 692 Snap 693 Female thread part 694 Female thread part 695 Pipe part 700 Position detection means 710 Light emitting element 720 Light receiving element 730 Translucent part 800 Antenna 801 Lead wire 900 Standard mechanism 910 Standard wheel 911 Hole 9 0 times transmission wheel 930 guide cam 931 protruding portions 940 leaf spring 950 guide contact B male thread part

Claims (1)

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,
A first antenna mounting portion that allows the antenna to be mounted is provided on a side portion of the case body, and an auxiliary case member is connected to the outside of the side portion of the case body provided with the first antenna mounting portion. Made possible
The auxiliary case member is provided with a second antenna mounting portion on which the antenna can be mounted,
The antenna is attached to the first antenna attachment portion, or attached to the second antenna attachment portion by connecting the auxiliary case member to the case body.
When the antenna is mounted on the second antenna mounting portion, the distance between the motor and the antenna is larger than when the antenna is mounted on the first antenna mounting portion. Movement of radio correction clock.

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