JP5127061B2 - Watch movement - Google Patents

Description

  The present invention relates to a movement for driving a pointer, which detects the position of the pointer with a transmissive photosensor.

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. In particular, the use of radio-controlled timepieces that receive standard time radio waves and correct their display times has become widespread, and the movement of radio-controlled timepieces requires a position sensor that detects the position of the pointer because it needs to recognize the display time. Provided. Patent Documents 1 and 2 disclose a movement that employs a transmissive photosensor as a position sensor.
Japanese Patent No. 3514644 Japanese Patent No. 3534648

  In recent years, the form of timepieces has been diversified more and more, and for the movement used in the radio-controlled timepiece, further ingenuity has been demanded in consideration of the simplification of the structure and the improvement of manufacturability.

  When providing a transmissive photosensor, conventionally, one of a light emitting element and a light receiving element is mounted on a circuit board (A) provided with a driving circuit, and the other of the light emitting element and the light receiving element is mounted on another substrate (B). And these board | substrates (A, B) are each arrange | positioned at the structural member of a case body, and it has the structure which connects a board | substrate (A) and a board | substrate (B) with a lead wire or a connector. On the other hand, if the other of the light emitting element and the light receiving element is directly connected to the substrate (A) with a lead wire, it is considered that the substrate (B) can be omitted. This is advantageous in that the number of parts is reduced.

  However, how to structure the transmission type photosensor is an important problem that affects workability in manufacturing the movement. When the substrate (B) is omitted, it is necessary to reexamine the support structure and connection structure of the elements mounted on the substrate (B) in consideration of the manufacturability of the movement.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a timepiece movement in which the structure of a transmissive photosensor is rationalized.

  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 a pointer, a circuit board provided with a drive circuit for controlling the motor, and a position of the pointer In the movement of the timepiece in which the pointer pipe is driven by the motor via the speed reduction mechanism, the case body is a first case on the back side. A flat type member in which the member and the second case member on the front side are assembled in the thickness direction, and the base end portion of the motor, the speed reduction mechanism, and the pointer pipe is provided inside the case body. The tip end portion of the pointer pipe projects from the second case member toward the front, and the circuit board is mounted on the front of the second case member, The photosensor is provided with one of the light emitting element and the light receiving element on the circuit board, and the other of the light receiving element and the light receiving element is provided on the first case member, and the speed reduction mechanism positioned between the light emitting element and the light receiving element or the A light transmitting portion that transmits light of the light emitting element is provided at a proximal end portion of the pointer pipe, and the light receiving element is connected to the circuit board by a lead wire,

  In the first case member, an element mounting portion for mounting the other of the light receiving element and the light receiving element by press-fitting from the back side of the case body, and an end of the lead wire from the inside of the case body to the back side A timepiece movement comprising: an extending through hole; a guide piece for fixing an end of the lead wire; and a frame portion surrounding the element mounting portion, the through hole, and the guide piece.

  The invention described in claim 2 of the present application includes 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 position of the pointer In the movement of the timepiece in which the pointer pipe is driven by the motor via the speed reduction mechanism, the case body is a first case on the back side. A flat type member in which the member and the second case member on the front side are assembled in the thickness direction, and the base end portion of the motor, the speed reduction mechanism, and the pointer pipe is provided inside the case body. The tip end portion of the pointer pipe projects from the second case member toward the front, and the circuit board is mounted on the front of the second case member, The photosensor includes a light emitting element provided on the circuit board, a light receiving element provided on the first case member, and the light emitting element disposed at the base end of the speed reduction mechanism or the pointer pipe positioned between the light emitting element and the light receiving element. The light-receiving element is connected to the circuit board by a lead wire, and the light receiving element is connected to the first case member on the back surface of the case body. An element mounting portion that is press-fitted from the side, a through hole that extends the end portion of the lead wire from the inside of the case body to the back side, a guide piece that fixes the end portion of the lead wire, and the element A mounting portion, a through hole, and a frame portion surrounding the guide piece are provided, and a light-shielding sealing member is attached to the element mounting portion so as to cover the light receiving element from the back side of the case body. The light receiving element is Light from stopping by and external leakage by sealing member is a configuration of a watch movement that is to be cut off.

  According to the present invention, it is possible to obtain a timepiece movement in which the structure of a transmissive photosensor is rationalized.

  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.

In the figure, reference numeral 700 denotes a transmissive photosensor including a light emitting element 710 and a light receiving element 720. Key points of the drive system located between the light emitting element 710 and the light receiving element 720,
That is, a translucent portion 730 that transmits light from the light emitting element 710 is provided at the base end portion of the speed reduction mechanism 310, 320 or the pointer pipe 410, 420, 430. The rotation position of the pointer pipes 410, 420, 430 is detected. The structure of the transmissive photosensor 700 will be described in detail later.

  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.

  An antenna mounting portion 611 that can mount the antenna 800 is provided on a side portion of the case body 600. The antenna 800 is a rod-shaped member formed by winding a coil around an iron core.

  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. Further, a translucent portion 601 a that transmits light from the light emitting element 710 is provided at a key portion of the intermediate plate, that is, a portion located between the light emitting element 710 and the light receiving element 720. 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.

  In the movement 1 of this example, the case body 600 is assembled, the circuit board 500 and the antenna 800 are attached, the wiring of the antenna 800 is soldered to the circuit board 500 and electrically connected thereto, and then the circuit board 500 is attached. The antenna 800 is tuned by operating electronic components of a receiving circuit such as a mounted capacitor.

  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 transmissive photosensor 700 of this example will be described. In the case of this example, the light emitting element 710 is an LED provided on the circuit board 500. The light receiving element 720 is a phototransistor provided in the first case member 610. As shown in FIG. 5, the light receiving element 720 is connected to the circuit board 500 by a lead wire 740. The base end portion of the lead wire 740 is soldered to the circuit board 500. Inside the case body 600, a passage 600a is provided that guides the leading end portion of the lead wire 740 from the circuit board 500 side to the first case member 610 side.

  6 to 10, the first case member 610 is provided with an element mounting portion 610a, a through hole 610b, a guide piece 610c, and a frame portion 610d.

  The element mounting part 610a is a part where the light receiving element 720 is press-fitted from the back side of the case body 600 to be mounted.

  The through hole 610b is a hole that extends the tip of the lead wire 740 from the inside of the case body 600 to the back side.

  The guide piece 610c is a portion for fixing the tip end portion of the lead wire 740, and is a cylindrical convex portion in the illustrated example. The end portion of the lead wire 740 is sandwiched between the plurality of guide pieces 610c or sandwiched between the guide pieces 610c and the inner surface of the frame portion 610d, and the covering thereof is pressed and fixed.

  The frame portion 610d is a rib-shaped portion surrounding the element mounting portion 610a, the through hole 610b, and the guide piece 610c. In the example of the figure, it is a rectangular ring.

  A light-shielding seal member 610e is attached to the element mounting portion 610a so as to cover the light-receiving element 720 from the back side of the case body 600, and the light-receiving element 720 is prevented from being detached by the seal member 610e and light from the outside. Is configured to be blocked.

  The assembly of the transmissive photosensor 700 is as follows. After assembling the first case member and the second case member, the circuit board 500 on which the light emitting element 710 and the lead wire 740 are soldered is assembled. At this time, the end portion of the lead wire 740 is passed through the passage 600a and extends from the through hole 610b to the back side of the case body 600.

  Then, the light receiving element 720 is press-fitted into the element mounting portion 610a, and the leading end portion of the lead wire 740 is fixed at a predetermined position with a guide piece, and the lead wire is soldered to the terminal 721 of the light receiving element 720 in this state. (See FIG. 8).

  Alternatively, after soldering the tip end portion of the lead wire 740 to the terminal 721 of the light receiving element 720, the base end portion of the lead wire 740 is soldered to the circuit board 500 through the through hole 610b through the passage 600a. Good.

  Further, a seal member 610e is attached to the edge of the element mounting portion 610a (see FIG. 9). If the light receiving element 720 is only press-fitted into the element mounting portion 610a, the light receiving element 720 may come off due to some impact, but is prevented from being detached by the seal member 610e, and such a situation can be prevented.

  The frame portion 610d is very advantageous in that the lead wire 740 is protected. When the movement 1 is handled at the time of manufacturing the timepiece, a finger, a tool, or a component of the timepiece may be caught on the lead wire 740. However, the frame portion 610d prevents such a situation. be able to. The light receiving element 720 can be provided in this way without being mounted on a substrate.

  The seal member 610e may be attached to the element mounting portion 610a and the frame portion 610d (see FIG. 10). In the case of this example, the height of the edge portion of the element mounting portion 610a and the edge portion of the frame portion 610d (the dimension protruding from the flat surface of the first case member 610 to the back side) is set equal, and the guide piece It is set slightly higher than the height of 610c. The cross-sectional diameter of the lead wire 740 is smaller than the height of the guide piece 610c. In terms of appearance, it is better to affix them to the element mounting portion 610a and the frame portion 610d.

  Further, since the seal member 610e has a light shielding property, it is not necessary to separately provide a means for blocking light from the outside with respect to the light receiving element 720. The positional relationship between the light emitting element 710 and the light receiving element 720 may be opposite to this example, but in that case, some means for blocking light from the outside with respect to the light receiving element 720 may be required. That is, since such a movement 1 is disposed inside the casing of the watch, it is not always necessary to provide a means for blocking light. However, depending on the structure of the casing, light enters the casing. In some cases, it can be considered. In this respect, if one element is covered with the seal member 610e, light can be blocked using the seal member 610e anyway. In this example, based on this, the light emitting element 710 and the light receiving element are received. The positional relationship of the element 720 is specified.

  As described above, the movement of this example is extremely rationally configured as a movement of a radio-controlled timepiece equipped with a transmission type photosensor. 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 timepiece of 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 of a timepiece according to the Example of this invention. It is a back view which shows the movement of the timepiece concerning the Example of this invention. It is a top view which shows the movement of the 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. FIG. 4 is a side cross-sectional view illustrating a main part of a case body and a transmission type photosensor according to an embodiment of the present invention. It is a perspective view which shows the back main part of the 1st case member concerning the Example of this invention. It is explanatory drawing which concerns on the Example of this invention and shows the back main part of a 1st case member. It is explanatory drawing which concerns on the Example of this invention and shows the back main part (state which provided the light receiving element and the lead wire) of the 1st case member. It is explanatory drawing which concerns on the Example of this invention and shows the back main part (state which affixed the sealing member on the element mounting part) of the 1st case member. It is explanatory drawing which concerns on the Example of this invention and shows the back main part (state which stuck the sealing member on the element mounting part and the frame part) of the 1st case member.

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 600a Path 601 Middle plate 601a Translucent part 610 First case member 610a Element mounting part 610b Through hole 610c Guide piece 610d Frame part 610e Seal member 611 Antenna mounting part 612 Snap 620 Second case member 630 Third case Member 700 Transmission type photosensor 710 Light emitting element 720 Light receiving element 721 Terminal 730 Light transmitting part 740 Lead wire 800 Antenna 900 Reference mechanism 910 Reference wheel 911 Hole 920 Time transmission wheel 30 Estimated cam 931 protruding portions 940 leaf spring 950 guide contact

Claims (2)

A motor, a speed reduction mechanism coupled to the motor, a pointer pipe for mounting a pointer, a circuit board provided with a drive circuit for controlling the motor, a transmission type photosensor for detecting the position of the pointer, and A movement of a timepiece comprising a case body to be supported, wherein the pointer pipe is driven by the motor via 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,
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,
In the transmissive photosensor, one of the light emitting element and the light receiving element is provided on the circuit board, and the other of the light receiving element and the light receiving element is provided on the first case member, and the light emitting element and the light receiving element are positioned between the light emitting element and the light receiving element. A light transmission part that transmits light of the light emitting element is provided at the base end of the speed reduction mechanism or the pointer pipe,
The light receiving element is connected to the circuit board by a lead wire,
In the first case member, an element mounting portion for mounting the other of the light receiving element and the light receiving element by press-fitting from the back side of the case body, and an end of the lead wire from the inside of the case body to the back side A timepiece movement comprising: an extending through hole; a guide piece for fixing an end of the lead wire; and a frame portion surrounding the element mounting portion, the through hole, and the guide piece. A motor, a speed reduction mechanism coupled to the motor, a pointer pipe for mounting a pointer, a circuit board provided with a drive circuit for controlling the motor, a transmission type photosensor for detecting the position of the pointer, and A movement of a timepiece comprising a case body to be supported, wherein the pointer pipe is driven by the motor via 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,
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 transmission type photosensor includes a light emitting element provided on the circuit board, a light receiving element provided on the first case member, and a base end portion of the speed reduction mechanism or the pointer pipe positioned between the light emitting element and the light receiving element. And a light-transmitting part that transmits light from the light-emitting element.
The light receiving element is connected to the circuit board by a lead wire,
In the first case member, an element mounting portion for press-fitting and mounting the light receiving element from the back side of the case body, and a through hole in which an end portion of the lead wire extends from the inside of the case body to the back side And a guide piece for fixing an end of the lead wire, and a frame portion surrounding the element mounting portion, the through hole, and the guide piece,
A seal member having a light shielding property is attached to the element mounting portion so as to cover the light receiving element from the back side of the case body, and the light receiving element is prevented from being detached by the seal member and light from the outside is received. Watch movement characterized by being cut off.

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