JP2010038582A - Movement of radio controlled watch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a movement of an radio controlled watch which is constituted rationally. <P>SOLUTION: A case body 600 of this movement includes a flat shape 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, and motors 210, 220, speed reducing mechanisms 310, 320, and base end parts of pointer pipes 410, 420, 430 are stored inside the case body. Each tip part of the pointer pipes is projected from the second case member toward the front, and a circuit board 500 is mounted on the front of the second case member. The first case member includes a mounting part 611 of an antenna 800 on a portion projected to the side part of the second case member as a view from the front side of the case body, and the circuit board and the antenna are mounted and connected electrically together, and then the antenna is tuned by operating an electronic component on a receiving circuit loaded on the circuit board. <P>COPYRIGHT: (C)2010,JPO&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 3.
JP-A-7-198871 Japanese Patent Laid-Open No. 10-123266 Japanese Patent Laid-Open No. 2001-42060

  Nowadays, the use of radio-controlled timepieces that receive standard time radio waves and correct their display times has become widespread, and movements used in radio-controlled timepieces also have a reduced number of parts, simplified structure, and manufacturability. Further improvements are required, taking into account improvements and other factors.

  The radio-controlled timepiece includes an antenna that receives a standard time radio wave and a receiving circuit that controls the reception operation. As a manufacturing process, generally, a circuit board A provided with a receiving circuit is connected to an antenna, and the circuit board A is further connected to a circuit board B provided with a driving circuit. However, in terms of reducing the number of parts and man-hours, it is desirable to integrate the circuit board A and the circuit board B and provide the receiving circuit and the driving circuit on one circuit board. However, since it is necessary to perform sensitivity adjustment, that is, tuning, after the antenna and the receiving circuit are connected, if one circuit board is provided in the case body of the movement, a configuration for facilitating tuning is important for manufacturing. It becomes a problem.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a rationally configured movement for a radio-controlled timepiece.

  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. An antenna for receiving the standard time radio wave is provided on the case body, and a receiving circuit for controlling the reception operation is provided on the circuit board. The case body includes a first case member on the back side and It is a flat type formed by assembling a front-side second case member in the thickness direction. Inside the case body, the motor, the speed reduction mechanism, and the front While storing the base end portion of the pointer pipe, the distal end portion of the pointer pipe protrudes from the second case member toward the front, and the circuit board is attached to the front of the second case member, The first case member includes a mounting portion for the antenna at a portion protruding to a side portion of the second case member as viewed from the front side of the case body, and the circuit board and the antenna are mounted, Is a movement of a radio-controlled timepiece having a configuration in which the antenna is tuned by operating electronic components of the receiving circuit mounted on the circuit board after being electrically connected.

  According to the present invention, it is possible to obtain a movement of a radio wave correction timepiece that is rationally configured.

  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 4 is equipped with a plurality of motors 210, 220, speed reduction mechanisms 310, 320 comprising gear trains connected to the motors 210, 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. 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. A circuit board 500 is provided with a receiving circuit for controlling the operation.

  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 constituent members are formed at the main points of the first case member 610, the second case member 620, and the intermediate plate 601. The distal ends of the indicator 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 indicator pipes 410, 420, and 430 are inserted.

  The first case member 610 is integrally provided with a mounting portion 611 of 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. The mounting portion 611 has a box shape with an opening on the front side, and a snap 612 for fixing the end of the antenna 800 is provided therein. That is, in the movement 1 of this example, the case body 600 is assembled, the circuit board 500 and the antenna 800 are attached, the lead wires of the antenna 800 are soldered to the circuit board 500, and they are electrically connected to each other. The antenna 800 can be tuned by operating electronic components of a receiving circuit such as a capacitor mounted on the substrate 500.

  Such a configuration has the following advantages. (1) Since the unit is equipped with the circuit board 500 and the antenna 800, it is excellent in versatility as a movement of a radio-controlled timepiece. (2) Since the driving circuit and the receiving circuit are provided on one circuit board 500, the number of components is small and a step of connecting the driving circuit and the receiving circuit is not necessary. (3) Since the circuit board 500 and the antenna 800 are attached to the case body 600 after the case body 600 is assembled, the antenna 800 can be easily tuned. (4) Since the circuit board 500 is positioned in front of the second case member 620 and the mounting portion 611 of the antenna 800 protrudes from the side of the second case member 620 when viewed from the front side of the case body 600. The manufacturing process from the mounting of the circuit board 500 to the mounting of the antenna 800 can be continuously performed without changing the direction (with the front face up). (5) Since the antenna 800 is mounted on the first member 610 of the case body 600, the number of parts and the time required for manufacturing the timepiece can be reduced as compared with a case where a member for mounting the antenna 800 is provided separately.

  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 in 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.

  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.

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

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 top view showing a movement of the radio-controlled timepiece according to the embodiment of the present invention. It is explanatory drawing which concerns on the Example of this invention and shows the internal structure of a case body.

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 Antenna mounting portion 612 Snap 620 Second case member 630 Third case member 700 Position detection means 710 Light emitting element 720 Light receiving element 730 Light transmitting portion 800 Antenna 900 Reference mechanism 910 Reference wheel 911 Hole 920 Time transmission wheel 930 Reference cam 931 Protrusion 940 Leaf spring 950 Reference contact

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. The movement is provided with an antenna for receiving the standard time radio wave and controls the reception operation. A receiving circuit is provided on the circuit board,
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,
The case body accommodates the motor, the speed reduction mechanism, and the proximal end portion of the pointer pipe, and the distal end portion of the pointer pipe projects from the second case member toward the front. ,
The circuit board is mounted on the front surface of the second case member,
The first case member includes a mounting portion of the antenna at a portion protruding from a side portion of the second case member as viewed from the front side of the case body.
After mounting the circuit board and the antenna and electrically connecting them, the antenna is tuned by operating electronic components of the receiving circuit mounted on the circuit board. Movement of radio correction clock.

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