JP2006337127A - Analog watch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide watch movement for an analog watch which uses a gear train support and a center bracket made of metal and can stably hold the center bracket using a simple structure, without having to increase the number of components. <P>SOLUTION: In the analog watch movement, having the gear train support 7 and the center bracket 8 comprising metallic tabular members, the center bracket 8 and a switch lever retainer 16 that are other watch functional member are integrally formed with a protrusion 8d and a spacer part 16a, respectively, and these both parts overlap with a predetermined margin to press in a predetermined overlap area 30. As a result, it becomes possible to press and fix the protrusion 8d to the insular shape 1b of a plate indirectly via a circuit board 15 and the gear support 7 by screwing up a circuit board retainer 20, and prevent the held state of each gear train from changing due to the warpage of the center bracket 8 etc., accompanying press working. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to the structure of an analog timepiece.

  Conventionally, a timepiece has a display format of time, an analog display system that displays time by two or three hands, a digital display system that displays time by an electro-optical display device typified by liquid crystal or LED, It is known that the method can be roughly divided into a combination method in which the analog display method and the digital display method are combined. In addition, among analog timepieces, for example, the user has the presence or absence of a second hand or calendar, and the presence or absence of a subordinate timekeeping function represented by a timer function, a chronograph function, an alarm function, a moon age display function, etc. It is also known that you can choose according to your preference.

  In addition, these timepieces can be broadly divided into a mechanical type that obtains driving force by winding the mainspring and a quartz type that drives the motor by electrical energy such as a primary battery or a secondary battery. Are known.

  Among these various types of timepieces, the analog display type timepieces decelerate the movement of the drive source represented by the above-described mainspring and step motor through a plurality of reduction gear trains, and a train wheel engaged with hands. A general method is to display the time by driving the hands by driving.

  The quality and functions of the speed reduction gear trains built in these analog watches or the gear trains that engage the hands may be affected by the holding structure, and the design of the watch must be very careful. is there.

  For example, in Patent Document 1, FIGS. 1 to 4 disclose a structure in which a plurality of wheel trains are held by two wheel train holding members, which are a metal train wheel receiver and a metal core support. In this conventional example, a second wheel 29 that is a train wheel that drives a second hand located at the center of the clock, a second rotor 27 that drives the second wheel 29, and a speed reduction wheel that decelerates the rotation of the second rotor 27 and transmits it to the second wheel 29. The second intermediate wheel 28 is sandwiched between the main plate 10 and the train wheel bridge 13, and the vertical axis thereof is pivotally supported. Further, for the rotor 16, which is a train wheel that drives the hour and minute hands, the reduction wheels 17, 18, 19 and the second wheel 20 that is the train wheel that drives the minute hand located at the center of the clock, the main plate 10 and the train wheel bridge 13 The upper and lower shafts are pivotally supported and held by the inner support 12 disposed between the base plate 10 and the base plate 10. In this way, by sandwiching the train wheel between the main plate 10 and the train wheel bridge 13 or the inner ring holder 12, the component wheel train of this timepiece movement is held in a state of being rotatable about its axis. In this specification, the dial side of the movement component is referred to as “lower”, and the back cover side is referred to as “upper”.

  In this conventional example, the main plate 10, the train wheel bridge 13 and the inner ring 12 are all formed of a substantially flat metal member. In addition, bearings made of precious stones represented by ruby are pressed and fixed to the upper and lower bearings of each train wheel of the main plate 10, the train wheel bridge 13 and the inner ring holder 12, and each train wheel and the train wheel bridge are received. By reducing the sliding friction load of the motor, the current consumption of each motor is reduced and stable operation is achieved.

Patent Document 2 discloses a structure in which a main plate, a train wheel bridge and a core ring are formed of a molded product made of a polymer resin. In this conventional example, with respect to the intermediate wheel 31 that is a speed reduction wheel that decelerates the rotation of the second rotor 23 and transmits it to the fourth wheel & pinion 41 that drives the second hand 47, the lower shaft is not the main plate 1 but the core 3 However, it is different from Patent Document 1 in that the shaft is supported.

Japanese Utility Model Publication No.59-116880 (FIGS. 1 to 4) Japanese Utility Model Publication No. 4-21183 (FIGS. 1 to 4)

  In this way, for the train wheel holding structure of the analog timepiece, the material and shape of the train wheel bridge and the core holder, the structure of the shaft hole, and which wheel train is held by the wheel bridge holder or the inner ring receiving member Various structures have been devised and put to practical use.

  For example, in Patent Document 2, the bearing portions of the train wheels of the train wheel receiver and the center receiver are directly drilled in the shaft hole of the train wheel in the material, but as described in Patent Document 1, ruby, etc. There is also a method of pressing and fixing a bearing made of a precious stone. It is generally known that the bearing pushing method has less sliding friction between the train wheel shaft and the hole than the method of drilling holes directly in the material. The bearing pushing method is widely used mainly for high-end products. This is the method used.

  Both the train wheel bridge and the center ring are often formed by pressing a plate-shaped metal material. However, as in Patent Document 2, they may be formed of a polymer resin injection-molded product. When these receiving members are formed of an injection molded product of a polymer resin, it is advantageous from the viewpoint of manufacturing cost and the degree of freedom in shape. However, when the bearing push-in method is adopted with a receiver made of polymer resin, the hardness difference between the receiver material and the precious stone material is large. There is a problem that it is. Moreover, since the material lacks rigidity, it is necessary to set the wall thickness to be large overall, and there is a drawback that the watch movement becomes thick.

  However, the wheel train of an analog timepiece usually has the hands concentrated at the center of the timepiece because the hands are usually arranged at the center of the timepiece. That is, it is common for the watch center portion to have at least two hands, that is, a minute hand and an hour hand, and a train wheel for driving the second hand all overlapped in a plane. It is a place that tends to be thickened by stacking component parts such as the inner shell and the core. Therefore, in the case of a structure using both the train wheel bridge and the center ring, the center wall is often formed by pressing a metal plate material in order to reduce the movement thickness as much as possible.

  Further, both Patent Document 1 and Patent Document 2 have a structure in which the upper shaft side of each component train wheel is supported by two receiving members of the inner support and the train wheel receiver. Some watches with only one wheel train and low-priced watches, etc., have a type in which the central support is abolished and all the train wheels are held by the main plate and the train wheel receiver.

  However, considering the quality, it is desirable to hold the train wheel with two parts, the train wheel bridge and the center ring. The reason for this will be described below.

  In the timepiece movement disclosed in Patent Document 1, the second wheel 20 for engaging and fixing the minute hand is sandwiched between the core 12 and the base plate 10 to perform positioning in the cross-sectional direction, and the second wheel for engaging and fixing the second hand. 29 is sandwiched between the main plate 10 and the core support 29 to perform positioning in the cross-sectional direction. By adopting such a structure, it is possible to prevent the second wheel 29 and the second wheel & pinion 20 moving at different speeds from contacting each other in cross section. This makes it possible to prevent a so-called revolving phenomenon in which other hands move slightly due to the sliding of the contact surfaces of the second wheel 29 and the second wheel 20 during fast-forwarding of the hands, for example, at time correction.

Further, in the structure in which the inclination of the center wheel 20 with respect to the axial direction is regulated by the inner ring 12 and the main plate 10 and the inclination of the second wheel 29 is regulated by the train wheel bridge 13, the amount of inclination of the second wheel 20 is the second wheel. Since it is not affected by 29 component tolerances, the amount of inclination of the center wheel & pinion 20 can be reduced. That is, since the inclination of the minute hand with respect to the pointer axis direction can be reduced, the interval between the cross-sections of the hands can be set small, and the finished timepiece can be thinned.

  For the reasons described above, the train wheel holding structure using the two types of receiving members, the train wheel receiver and the core receiver, increases the cost by increasing the number of parts by one, but saves space and stabilizes the quality. Therefore, it is a structure that is widely used especially for high-end watches and thin watches.

  In addition, not only from the viewpoint of quality, but also from the viewpoint of downsizing the watch movement, the center axis position of the train wheel that pivotally supports the lower end side with the core can be overlapped with other parts in a plane. Therefore, the space between the train wheel and the main plate can be effectively used, and the timepiece movement can be downsized.

  What is important here is that the core formed by pressing a generally flat plate-shaped metal member is held stably, and the effect of part processing accuracy on the watch quality is minimized. It is a thing.

  For example, in the case of Patent Document 1, when the core 12 is formed by press working, warping occurs during press working. Here, if the intermediate receiver 12 is not sufficiently fixed, there is a problem in that the holding state of each wheel train such as the rotor 16 and the intermediate wheels 17, 18, 19 held by the intermediate receiver 12 is affected. For example, if the inner support 12 is warped upward, the cross-sectional clearance between the train wheel bridge 13 and the intermediate receiver 12 is reduced, so that the minimum vertical play of the second wheel 29 is narrow against the design intention. In the worst case, it may become a cause of squeaking. Further, since the cross-sectional clearance between the core 12 and the main plate 10 is widened, the minimum vertical play of the second wheel 20 is widened against the design intention, and the second wheel 20 needs to move up and down. There is a possibility of becoming larger than that. In this case, the tilt of the minute hand engaged with the center wheel & pinion 20 is increased, and there is a risk that the second hand or the hour hand arranged on the top and bottom may come into contact with the second hand and cause time delay. Further, the vertical axis of each wheel train of the rotor 16 and the intermediate wheels 17, 18, 19 may be disengaged from the shaft hole of the main plate 10 or the inner support 12, which may cause a stop.

  In this way, the holding and fixing structure of the inner support 13 is directly connected to the quality of the timepiece movement, so it can be said that special care is required. In Patent Document 1, the core holder 12 is secured to the timepiece movement with a total of five screws to achieve stable holding.

  However, five screws are used for fixing the inner support, and it is necessary to secure a screw space in the movement. Explaining with specific numbers, even if the diameter of the screw head is 1 mm, it is necessary to secure a space on the main plate 10 with a diameter of 1 mm + the number of screws in consideration of the clearance of peripheral parts, which hinders the miniaturization of the movement. It was a factor. In addition, the cost of the screw itself is a factor in increasing the cost of the movement.

  As a method of fixing by other than screws, for example, a boss used for positioning the inner support is set to be fitted to the base plate, and a method of preventing floating by a fitting force, or fixing by caulking or the like is also conceivable. However, in this case, there is a drawback that the variation of the fitting force increases due to variation in the boss diameter tolerance, which tends to be unstable. Further, if the fitting allowance is too large, there is a possibility that the push-in becomes hard during actual assembly or the boss is shaved during fitting. Since the inner support 12 has a role of supporting each train wheel in a pivotal manner, a train wheel part is often arranged in the vicinity, and a part of the boss is scraped off at the time of fitting. If you run around, it can still cause a stop. In addition, since fixing by caulking cannot be disassembled, there is a problem when considering after-sales service of the product.

  Further, as in Patent Document 2, if the train wheel bridge is a molded part made of a polymer resin, the degree of freedom of the shape is generated in comparison with the press-molded product of the metal plate part, so that the centering can be efficiently performed. It is also possible to hold it down. However, in this case, as described above, when a precious stone is used for the bearing portion, there is a problem that the fixing force of the precious stone is not stable. Also, considering the quality of the interior of the movement, the train wheel bridge is often located on the top surface of the movement, and is often seen in the finished movement state, so it is not suitable for the movement used in luxury watches. There is also.

  For these reasons, for example, an antenna, a receiving IC, a filter crystal, etc. When applying the column holding structure, it is difficult to reduce the size of the movement.

  The object of the present invention is to use a metal train wheel bridge and a core support that can stably hold the core support without increasing the number of parts with a simple structure in order to eliminate the above-mentioned drawbacks. It is to provide a watch movement for an analog watch.

  In order to achieve the above object, the gist of the present invention is that an analog wheel train, a ground plate serving as a base material for a timepiece movement, a train wheel bridge comprising a substantially flat metal member, and a substantially flat metal member. And a timepiece functional member, and a part of the analog wheel train is rotatably supported by the base plate and the train wheel bridge, and the other analog wheel train is connected to the core support and the base plate, Alternatively, in an analog timepiece that is rotatably supported by at least one of the inner ring and the train wheel bridge, a spacer portion that extends from the timepiece function member and is interposed between the train wheel bridge and the intermediate ring is provided, and the spacer It is characterized in that the position of the inner support in the cross-sectional direction is regulated by pressing the inner support toward the main plate by the portion. Thereby, a stable intermediate holding structure can be provided without using a fixing member such as a screw.

  Further, the spacer portion is provided with a convex portion protruding vertically, and the convex portion presses and fixes the inner support to the base plate with a predetermined pressing margin. Thereby, the dispersion | variation in the processing precision of each component is absorbed and the stable receiving support structure can be provided.

  In addition, the spacer portion overlaps with a gear portion of at least one wheel train in a plane and escapes in a cross-section. Thereby, the dead space in the timepiece movement can be effectively used, and a small and stable inner support holding structure can be provided.

  The watch functional member having a power source and a conductive part electrically connected to a cathode and an anode of the power source, and having the spacer portion, the main portion other than the spacer portion is connected to the cathode conducting member and the anode conducting portion. It is characterized by being arranged between members. As a result, it is possible to provide a stable intermediate holding structure without a significant increase in cost by integrally forming it as a partial shape of another timepiece function member without adding the spacer portion as an independent component.

  The timepiece functional member is a molded product made of a polymer resin. This makes it possible to form a spacer portion having a relatively high degree of freedom.

  Further, the number of fixing portions for fixing the train wheel bridge to the main plate is two or less, and a plate-like second timepiece function member is disposed on the train wheel bridge, and the second timepiece function member The position in the cross-sectional direction of the train wheel bridge is regulated by the above. As a result, the train wheel bridge can be held at three points that are relatively stable, and a stable train wheel bridge holding structure and a middle receiving structure can be provided.

  The second timepiece function member is a circuit block including at least a circuit board and an IC mounted on the circuit board. As a result, it is possible to provide a structure for holding the train wheel bridge indirectly by holding the circuit block without providing a separate holding member for fixing the train wheel bridge, and as a result, stably holding the core bridge. Is possible.

  Further, the crown has a back which is a pointer correcting mechanism using the crown, and the timepiece function member is disposed between the circuit board and the back. As a result, it is possible to provide a stable intermediate holding structure without a significant increase in cost by integrally forming it as a partial shape of another timepiece function member without adding the spacer portion as an independent component.

  Further, the main body of the timepiece movement has a base plate, a train wheel bridge made of a substantially flat metal member, and a core ring made of a substantially flat metal member. A shape is provided, and the longitudinally bent shape tip is brought into contact with a lower part in cross section. As a result, it is possible to dispose the restricting portion in the cross-sectional direction of the train wheel bridge only in a necessary and sufficient location substantially radially with respect to the center of the watch, suppressing the inclination of the train wheel bridge, If it is strong, the holding of the inner support can be stabilized.

  Further, the timepiece movement is an analog radio timepiece having an antenna. Accordingly, in an analog radio timepiece movement having a large number of special components such as an antenna and a receiving IC, the movement size can be reduced as much as possible, and a stable holding structure for receiving the core can be provided.

  In the present invention, in an analog timepiece movement using a train wheel bridge and a middle bridge formed by press molding of a metal plate material, the float of the middle bridge is restrained by another timepiece function member different from the train wheel bridge and the middle bridge. For this reason, a structure has been proposed in which a spacer portion is interposed, and the spacer portion is sandwiched between the train wheel bridge and the inner ring to suppress the floating of the inner ring. Thereby, without increasing the number of parts, it is possible to suppress the floating of the core by a simple method, to stabilize the function and quality, and to reduce the cost.

  In addition, by arranging this spacer part using a place that was a dead space in the conventional movement, for example, between the train wheel and the train wheel bridge, a higher-density movement structure can be realized, and the movement can be made compact. Can be realized.

  The present invention will be described by exemplifying a small radio timepiece and a standard type analog timepiece as an embodiment, but two or more train wheel holding members, a train wheel bridge and a middle ring, and another clock function in the vicinity thereof. Any analog timepiece having members can be applied, and its application range is extremely wide, and the effect is great.

  Hereinafter, the details of the present invention will be described in detail with reference to the drawings.

  FIGS. 1 to 7 show a first embodiment of an analog timepiece movement to which the present invention is applied. FIG. 1 is a plan view of a main part on the upper surface side of the analog timepiece movement, and FIG. 2 shows one of the analog timepiece movements shown in FIG. FIG. 3 is a cross-sectional view of the main part of the analog watch movement shown in FIG. 1 near the center of the watch showing the wheel train holding structure. 4 and 4 are cross-sectional views showing the main part of the analog watch movement intermediate holding structure shown in FIG.

  1 to 4, reference numeral 1 is a base plate for a base material for incorporating each component such as a train wheel, and 2 is one component of a step motor. The rotating rotor 3, 3 meshes with the rotor 2, and the fifth wheel, which is a train wheel that decelerates the rotation of the rotor 2, 4 meshes with the fifth wheel 3, and the second hand (not shown) is attached to drive the second hand. Car 5 is engaged with the fourth wheel 4 and the third wheel is a wheel train for reducing the rotation of the fourth wheel 4, 6 is engaged with the third wheel 5, and the second wheel is attached with a minute hand (not shown), 23 A cylindrical wheel to which an hour hand (not shown) is attached, 7 is a train wheel bridge which is a plate-like component for supporting the rotor 2, fifth wheel 3 and fourth wheel 4, and 8 is a wheel support for fifth wheel 3 and second wheel 6. A core plate which is a plate-like component to be held, 9 is a dial, 10 is a battery as a drive source, 11 is a winding stem, 12 is a winding 11 is a component part of a reverse mechanism that is a manual time correction mechanism by 11, and is a part that engages with the winding stem 11 to restrict its position, and 13 is also a component part of the reverse part. By restricting the plane position of the center wheel, the back presser 14 for regulating the plane position of the winding stem 11 engaged with the setting lever 12 is engaged with the second wheel 6 and the hour wheel 23, and the rotation of the second wheel 6 is decelerated. A day wheel which is a speed reducing vehicle transmitted to the hour wheel 23, 15 is a circuit board on which a microcomputer IC 15a, a crystal resonator 15b and the like are mounted, and 16 is disposed between the circuit board 15 and the back turning mechanism. A switch lever press that is a clock function member that positions the cross section of the setting lever 12 and the back presser 13 that are components of the turning mechanism, 17 is a stator that is a component of the step motor, and 18 is a step motor. A coil block is formed parts.

  FIG. 5 is an external view schematically showing the shape of the train wheel bridge 7. The train wheel bridge 7 has a rotor bearing 7b, a fifth wheel bearing 7c, and a fourth wheel on the upper shaft portions of the rotor 2, the fifth wheel 3 and the fourth wheel 4 of the train wheel bridge 7a as a base. Three bearings of the bearing 7d are pressed and fixed. The train wheel receiver 7a is a substantially flat part formed by pressing a metal member. As a result, variations in the fixing force of the bearings 7b to 7d are minimized.

  FIG. 6 is an external view schematically showing the shape of the core receiver 8. The inner ring 8 has a fifth wheel bearing 8b pushed in and fixed to the lower shaft portion of the fifth wheel 3 of the intermediate body 8a serving as a mother body. The intermediate receiver 8a is a substantially flat part formed by pressing a metal member. As a result, the fixing force of the fifth wheel & pinion bearing 8b is stabilized, and the timepiece movement is made thinner. Further, as shown in FIGS. 1 and 3, the stator 17 is provided to the vicinity of the center of the fifth wheel 3 by adopting a structure in which the lower shaft of the fifth wheel 3 is pivotally supported by the fifth wheel bearing 8 b of the inner support 8. And the stator 17 is enlarged. This makes it possible to improve motor performance. That is, when the dead space under the fifth wheel 3 is effectively utilized by the stator 17, it is possible to overcome the conflicting problems of downsizing the movement and improving the motor performance.

  Further, the train wheel bridge 7 is formed with a screw hole 7e, and the intermediate receiver 8 is formed with a screw hole 8c. As a result, the train wheel bridge 7 and the middle ring 8 are structured to be fixed to the timepiece movement by a single wheel train receiving screw 19. The circuit board 15 covers almost the entire area of the timepiece movement and is assembled on the train wheel bridge 7. A circuit holder 20 is disposed on the circuit board 15. The circuit presser 20 is a plate-like component formed by pressing a metal plate material, and is fixed to the timepiece movement by a circuit presser screw 21. That is, the circuit board 15 has a structure that is fixed to the timepiece movement by the circuit pressing screw 21 via the circuit pressing 20.

Here, since the circuit board 15 is disposed on the train wheel bridge 7, when the metal wheel train holder 7 a comes into contact with a pattern (not shown) formed on the lower surface of the circuit board 15, the circuit board 15 is electrically short-circuited. Resulting in. On the other hand, a half-cut shape 7f is formed by pressing on the circuit board 15 side of the train wheel bridge 7, and the half-cut shape 7f is in contact with the circuit board 15. Since the half-cut 7f is formed in a place where there is no pattern on the circuit board 15, the circuit board 1 is actually formed.
The portion where the pattern 5 is formed and the train wheel bridge 7 have a cross-sectional clearance for the height of the half-cut 7f, and can prevent a short circuit.

  FIG. 7 is an external view showing the shape of the switch lever presser 16. The switch lever presser 16 is disposed between the back presser 13 and the setting lever 12 and the circuit board 15, and is a component formed by injection molding using a polymer resin. The back, which is a mechanism for correcting the time by the user via the winding stem 11, is made up of an operating part having a spring shape and is a mechanism that is directly operated by the user. It is. In particular, the setting lever 12 rotates around the setting shaft 1a disposed on the main plate 1 in conjunction with the winding stem 11 when the winding stem 11 is pulled, but is often pulled by the winding stem 11 with a large force. It is a part that requires attention in operation. That is, if an unstable operation such as floating of the setting lever 12 occurs, there is a possibility that the operation of the underside becomes unstable or a failure such as the worst winding stem 11 comes off.

  On the other hand, by disposing the switch lever holder 16 between these parts and the circuit board 15, the gap between the setting lever 12, the back holder 13 and the circuit board 15 is filled, and the floating of each part is minimized. Suppress. That is, the switch lever presser 16 serves as a spacer that stabilizes the operation of the reverse side.

  The watch movement shown in FIGS. 1 to 4 is an analog radio timepiece having an antenna 22 inside the movement. The current signal induced by the standard time radio wave received by the antenna is processed by the receiving IC 15c, and the extracted time signal is processed by the microcomputer. It has a function of automatically correcting the time by sending it to the IC 15a.

  These radio timepieces require a large number of components such as the antenna 22 and the receiving IC 15c that do not exist in a normal analog timepiece movement in the timepiece movement. Further, since a large number and types of elements such as capacitors mounted on the circuit board 15 are required, the movement is difficult to reduce in size.

  For example, in FIG. 1, when trying to fix the inner support 8 to the watch movement with a total of two screws, the train wheel receiving screw 19 and another screw, It interferes with the stator 17 in a planar manner. In order to avoid this, it is necessary to secure a space for inserting a screw by forming a notch in the stator 17 or by moving the stator 17 to the outer peripheral side of the movement. However, if a notch is formed in a part of the stator 17, a part of the planar area of the stator 17 is locally small, and the motor performance is adversely affected, such as an increase in current consumption due to an increase in magnetic resistance. . Further, when the stator 17 is moved in the outer peripheral direction of the movement, the movement size is increased as a result.

  On the other hand, the present invention has a structure that can stably hold the inner support 8 that is a flat plate part made of metal with a single screw. The structure will be described below.

  In the present invention, in the inner support 8 shown in FIG. 6, the convex portion 8 d is formed on the outer peripheral side of the portion that holds the fifth wheel 3, and the tip portion thereof is an island formed integrally with the main plate 1. It is characterized by a shape riding on the shape 1b.

Further, as shown in FIG. 7, the switch lever presser 16 is characterized in that a spacer portion 16a is formed. As shown in FIG. 4, the spacer portion 16 a has a shape that extends between the train wheel bridge 7 and the minute wheel 14 to the vicinity of the convex portion 8 d of the intermediate receiver 8, and the tip portion thereof is the above-mentioned. The projected portion 8d overlaps with the overlapping region 30 in a planar manner. FIG.
As shown in FIG. 3, the train wheel bridge 7, the circuit board 15, and the circuit holder 20 are disposed on the overlapping region 30. Accordingly, when the overlapping region 30 is viewed in a cross section, the island shape 1b, the convex portion 8d, the spacer portion 16a, the train wheel bridge 7, the circuit board 15, and the circuit retainer 20 of the ground plane are arranged in order from the bottom. The circuit board 15 is overlapped with no gaps other than the necessary minimum cross-sectional gap. Further, as described above, the train wheel bridge 7 and the circuit board 15 are in contact with each other via the half-cut 7f of the train wheel bridge 7, so that the train wheel bridge 7 is substantially pressed by the circuit board 15. Yes. As shown in FIG. 1, the circuit retainer 20 is securely fixed to the timepiece movement by the circuit retainer screw 21, so that the floating of the inner support 8 can be depressed via the circuit retainer screw 21. In other words, when the inner support 8 is warped upward due to the press working, the circuit holder 20 presses the circuit board 15 by tightening the circuit holding screw 21 within the range of the overlapping region 30, and the circuit board 15 is lowered on the lower surface. The train wheel bridge 7 abutting on the side is pressed down, and the train wheel bridge 7 further presses the spacer portion 16a, so that the spacer portion 16a presses the convex portion 8d against the island shape 1b of the main plate, and the inner sleeve 8 is lifted. It can be prevented. Accordingly, the intermediate retainer 8 is lifted indirectly by the circuit holding screw 21 by intentionally forming the overlapping region 30 where the respective parts overlap in a plane without newly adding a screw for fixing the retainer. Can be prevented. In other words, it is possible to prevent the center support 8 from being lifted in a minimum necessary space compared to the screw, and to stabilize the holding state of the fifth wheel 3 and second wheel 6 held by the center support 8. Become.

  Here, a feature is that convex shapes 16b and 16c are formed in the vertical direction at the tip of the spacer portion 16a. Of the upper and lower convex shapes 16b and 16c, the convex shape 16c formed on the lower side presses the convex portion 8d of the core receiver 8 with a predetermined pressing margin. Further, the convex shape 16b formed on the upper surface side is in contact with the train wheel bridge 7 with a predetermined pressing margin. Thus, by intentionally setting the cross-section pressing allowance at the time of designing, it becomes possible to prevent the pressing state of the overlapping region 30 from becoming insufficient due to the error of each part. In addition, it is difficult to assemble by using a switch lever presser 16 which is a molded product of a polymer resin, which is a soft material compared to metal, by using a switch lever presser 16 which is relatively soft in shape. In addition, it is possible to easily obtain a predetermined effect without a large cost increase.

  Further, the protruding portion 8d and the spacer portion 16a are characterized by extending to the overlapping region 30 through a dead space in the timepiece movement. That is, as shown in FIGS. 1 and 4, the spacer portion 16 a extends to the overlap region 30 through a space formed between the gear portion of the minute wheel 14 and the train wheel bridge 7. Further, the convex portion 8d has a certain flat clearance with the tip of the minute wheel 14 and a certain flat clearance with the chip capacitor 15d mounted on the lower surface of the circuit board 15 and positioned on the stator 17. The shape is kept. Therefore, the convex portion 8d and the spacer portion 16a do not impose any design restrictions on the chip capacitor 15d and the minute wheel 14 mounted on the circuit board 15.

  These regions are so-called dead spaces that are not particularly used when the convex portions 8d and the spacer portions 16a are not provided. In the present invention, the convex portions 8d and the spacer portions 16a are formed using these dead spaces. As a result, it is possible to effectively use the space in the movement, and to realize a stable inner support holding structure without increasing the movement size.

As shown in FIGS. 4 and 5, a lower bending shape 7 g is formed by bending in the vicinity of the rotor bearing 7 b of the train wheel bridge 7. The lower bent shape 7g is characterized in that its tip end portion is brought into contact with the upper surface of the stator 17 disposed below, thereby functioning as a tilt preventing shape of the train wheel bridge 7. Further, as shown in FIG. 4, the vicinity of the positioning hole 7 j of the train wheel bridge 7 is on the switch lever presser 16. Although not shown, the island shape of the main plate is formed in the vicinity of the positioning hole 7 h of the train wheel bridge 7, and the train wheel bridge 7 is configured to ride on the ground plate 1 even in this vicinity.

  In addition to these receiving surfaces, the lower bending shape 7g is provided, so that the train wheel bridge 7 is held in the cross-sectional direction in the vicinity of the wheel train receiving screw 19, the lower bending shape 7g, the overlapping region 30, and the positioning hole. 7h and the vicinity of the positioning hole 7j serve as a receiving surface. That is, these receiving surfaces are arranged as evenly as possible around the wheel train parts such as the fourth wheel 4, the fifth wheel 3, the third wheel 5, and the rotor 2 that are particularly susceptible to the inclination of the wheel train receiver 7. By arranging, the train wheel bridge 7 becomes more difficult to tilt, and a stable holding structure of the train wheel bridge 7 can be realized by a simple method without providing another part such as a spacer.

  In this embodiment, only one overlapping region 30 is arranged, but the structure is not limited to one, and a more stable holding structure can be obtained by arranging a plurality of similar structures. Is also possible. In an extreme case, it is possible to realize a holding structure for the train wheel bridge 7 and the intermediate ring 8 in which the train wheel bearing screw 19 is eliminated. In this case, however, a decrease in assemblability becomes a problem. In other words, this fixing structure is a structure in which the circuit holder 20 and the intermediate receiver 8 are indirectly pressed by screwing and fixing the circuit holder 20 to the timepiece movement with the circuit holding screw 21 to prevent the parts from floating. However, this is only a structure in the completed movement state. If the train wheel receiving screw 19 is abolished, there is no restriction in the cross-sectional direction of the train wheel receiver 7 and the inner support 8 until the circuit holding screw 21 is tightened in the assembly process. When a light impact or the like is applied before the circuit holding screw 21 is tightened, there is a possibility that an assembly failure such as the wheel train receiver 7 and the inner receiver 8 coming off occurs. In particular, in the case of automatic assembly, there is a possibility that the problem of disengagement will be noticeable due to vibration of the parts feeder or the like, and it is necessary to avoid the state where the train wheel bridge 7 is on without fixing with screws or the like. Therefore, it can be said that it is desirable from the viewpoint of assembling to keep at least one train wheel receiving screw 19 from the viewpoint of temporarily fixing.

  Next, a second embodiment of the present invention will be described with reference to the drawings. The same components as those in the first embodiment are given the same names, and detailed description thereof is omitted.

  8 and 9 show a standard type analog timepiece movement according to a second embodiment of the present invention. FIG. 8 is a plan view of the main part thereof, and FIG. 9 is a sectional view of the main part thereof. For convenience of explanation, FIG. 8 is an exploded plan view of the circuit retainer.

  8 and 9, 51 is electrically connected to the cathode of the battery 110 and the circuit board 115 by contacting one end of the cathode of the battery 110 and the other end of the circuit board 115 with a predetermined deflection. A battery receiving spring 52, which is a spring component, is an insulating spacer.

The insulating spacer 52 is disposed between the battery receiving spring 51 and the train wheel bridge 107, and is a component for insulating the train wheel receiving 107 and the battery receiving spring 51 connected to the battery cathode. Yes, for the purpose of insulation, it is molded by injection molding with a polymer resin.

As shown in FIG. 8, the insulating spacer 52 is an elongated part similar to the battery receiving spring 51, and the main part thereof overlaps with the battery receiving spring 51 in a plane, but a spacer portion 52a is formed in a part thereof. It is a feature. The spacer portion 52 a extends under the third wheel 105 and extends to a substantially triangular overlapping region 130 surrounded by the third wheel 105, the minute wheel 114, and the circuit board 115. In addition, the intermediate receiver 108 has a convex portion 108 d that passes under the third wheel 105 and extends to the overlapping region 130. That is, as in the first embodiment, in the overlapping region 130, the convex portion 108d is placed on the island shape 101b of the base plate 101, and the train wheel bridge 107 is overlapped thereon via the spacer portion 52a. Ultimately, the circuit holder 120 is pressed against the train wheel bridge 107 to prevent the inner bridge 108 from floating.

Accordingly, only one train wheel receiving screw 119 is fixed to the inner support 108, and the other is indirectly pressed and held by the circuit holder 120 in the overlapping region 130, so that the screw can be reduced to the minimum necessary and the component cost can be reduced. Reduction and assembly man-hours have been achieved.

In this embodiment, unlike the first embodiment, two train wheel receiving screws 119 for fixing the wheel train receiver 107 are used. Therefore, finally, the train wheel bridge 107 is held in the cross-sectional direction by a total of three receiving surfaces of the two wheel train receiving screws 119 and the overlapping region 130, and the three wheel train positions are set for each wheel train position. The receiving surfaces at the locations are arranged substantially evenly. As a result, the train wheel bridge 107 can be stably held.

As described above, when the present invention is applied, the train wheel bridge 107 and the inner ring 108 made of a plate-shaped metal member can be reliably stabilized with a simple structure without particularly adding a fixing part such as a screw or another spacer. Can be held.

It is a principal part top view of the analog radio timepiece movement which shows the 1st Example of this invention. It is a principal part top view which shows the state which decomposed | disassembled the circuit holder and the circuit block of the analog radio-controlled timepiece movement which shows the 1st Example of this invention. It is principal part sectional drawing of the center vicinity of the analog radio-controlled timepiece movement which shows the 1st Example of this invention. FIG. 3 is a cross-sectional view of the main part of the analog radio timepiece movement showing the first embodiment of the present invention in the vicinity of the overlapping shape of the inner ring, the train wheel bridge and the switch lever presser. It is an external view which shows the train wheel ring shape of the analog radio timepiece movement which is the 1st Example of this invention. It is an external view which shows the receiving shape of the analog radio timepiece movement which is the 1st Example of this invention. It is an external view which shows the shape of the switch lever holding | maintenance of the analog radio timepiece movement which is the 1st Example of this invention. It is a principal part top view of the analog radio timepiece movement which shows the 2nd Example of this invention. It is principal part sectional drawing of the analog radio timepiece movement which shows the 2nd Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,101 Ground plate 1a Ironing shaft 1b, 101b Island shape 2,102 Rotor 3,103 Fifth wheel 4,104 Fourth wheel 5,105 Third wheel 6,106 Second wheel 7,107 Wheel train receiver 7a Body 7b Rotor bearing 7c Fifth wheel bearing 7d Fourth wheel bearing 7e Train wheel receiving screw hole 7f Half-drawn shape 7g Lower bending shape 7h Positioning hole 7j Positioning hole 8, 108 Center receiving 8a Center receiving body 8b Tightening holes 8d, 108d Protruding part 9, 109 Dial 10, 110 Battery 11, 111 Winding stem 12, 112 Settle 13, 113 Back presser 14, 114 Back wheel 15, 115 Circuit board 15a, 115a Microcomputer IC
15b, 115b Crystal 15c Receiver IC
15 d Chip capacitor 16 Switch lever holder 16 a Spacer portion 16 b Upward convex shape 16 c Downward convex shape 17, Stator 18, 118 Coil block 19, 119 Train wheel receiving screw 20, 120 Circuit retainer 21 Circuit retainer screw 22 Antenna 23, 123 hour wheel 30, 130 overlapping region 51 battery receiving spring 52 insulating spacer 52a spacer portion

Claims (10)

An analog train wheel, a ground plate as a base material for the watch movement, a train wheel bridge made of a substantially flat metal member, a core holder made of a substantially flat metal member, and other timepiece function members, A part of the analog wheel train is rotatably supported by the base plate and the train wheel bridge, and the other analog wheel train is supported by at least one of the core support and the base plate, or the core support and the train wheel bridge. In an analog watch that is rotatably supported,
A spacer portion is provided extending from the timepiece function member and interposed between the train wheel bridge and the inner ring, and the position of the inner ring in the cross-section direction is regulated by pressing the inner ring toward the main plate by the spacer. An analog clock characterized by 2. The analog timepiece according to claim 1, wherein a convex shape protruding vertically is disposed on the spacer portion, and the convex shape has a predetermined pressing margin to press and fix the inner support to the base plate. . 3. The analog timepiece according to claim 1, wherein the spacer portion is planarly overlapped with a gear portion of at least one train wheel and escapes in cross section. The timepiece functional member having a power source and conductive parts electrically connected to the cathode and anode of the power source and having the spacer portion is disposed between the cathode conducting member and the anode conducting member. The analog timepiece according to any one of claims 1 to 3, wherein: The analog timepiece according to claim 4, wherein the timepiece functional member is a molded article made of a polymer resin. There are two or less fixing portions for fixing the train wheel bridge to the main plate, and a plate-shaped second timepiece function member is disposed on the train wheel bridge, and the second timepiece function member 6. The analog timepiece according to claim 1, wherein a position in a cross-sectional direction of the train wheel bridge is regulated. The analog timepiece according to any one of claims 1 to 6, wherein the second timepiece function member is a circuit block including at least a circuit board and an IC mounted on the circuit board. 8. The analog timepiece according to claim 7, further comprising: a crown and a back that is a pointer correcting mechanism using the crown, wherein the timepiece functional member is disposed between the circuit board and the back. . It has a main plate as a base material for the timepiece movement, a train wheel bridge made of a substantially flat metal member, and a core bridge made of a substantially flat metal member, and the train wheel bridge has a vertically bent shape by pressing. An analog timepiece characterized in that it is arranged and a longitudinally bent shape tip is brought into contact with a lower part in cross section. The analog timepiece according to claim 1, wherein the movement is an analog radio timepiece having an antenna.

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