JP2007263716A - Timepiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems wherein, in a timepiece movement wherein at least a part of a receiving member is constituted of an injection-molded article by a polymer resin, when especially a different timepiece component is arranged on a hand wheel, a load with hand is difficult to be received stably, and a receiving member is deformed by the load with hand, or the timepiece component placed thereon is damaged. <P>SOLUTION: A reinforcing plate 119, a metal plate member, is interposed between a second pinion 108 and the second receiving member 117, a polymer resin molded article. This timepiece has a structure wherein the reinforcing plate 119 is not treated as a bearing member, but a hole part is loosely fit to a tenon part of the second pinion 108, and a bearing function itself is provided on the second receiving member 117. A structure is realized, wherein, by elongating flatly the reinforcing plate 119 to a range receivable by a tool 121 with hand, the hand wheel is not influenced by position accuracy of an added component, and the load at a pointer insertion time can be received stably. <P>COPYRIGHT: (C)2008,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.

  Further, in an analog display type timepiece, it is common that an hour / minute hand for displaying time, or three hands obtained by adding a second hand to the two hands are arranged at the center of the timepiece. Other examples of pointer placement include small second hand type in which the hour and minute hands are placed at the center of the watch and the second hand with a short length other than the center is placed in a decorative manner. In particular, the watch has a chronograph function as an additional function. However, many examples are known in which a plurality of auxiliary hands indicating the measurement time of the chronograph are arranged in addition to the center of the clock.

  In addition, the structure of a watch movement is generally a structure in which the components of the movement, such as a train wheel or a step motor, are assembled to the base plate that is the base material, but the base plate that is the base material is a metal plate material The structure is roughly divided into a structure in which a necessary shape is formed by cutting or plastic working and a structure in which a necessary shape is formed by injection molding of a polymer resin. Because the metal base plate is difficult to form in three dimensions due to its processing method, it is necessary to add a spacer part made of polymer resin separately, but because it is highly rigid, it has a characteristic that it is resistant to impact etc. is there. In addition, a base plate made of a polymer resin can easily form a three-dimensional shape and can reduce the number of parts, but since rigidity is low, attention should be paid to impact and the like.

  In designing these types of multi-needle movements having sub-needles, it is necessary to pay attention to whether or not the structure with which the load with needles of the sub-needles is stably received is as follows. That is, these sub-needles usually do not receive any force in the cross-sectional direction, but when attaching the pointer, the load with the needle is applied to the holding member that regulates the position in the cross-sectional direction of the vehicle to which the pointer is attached. Take it. Thereby, when a holding member is a polymer resin, an indentation etc. may be attached.

In addition, when designing these multi-needle movements with completely new design, it is possible to design in consideration of how to receive these load with needles. For example, the existing three-hand clock movement is used as much as possible. When designing a multi-needle movement with minor modifications, if the placement position of the components of the existing three-hand watch movement that is the base overlaps with the placement position of the sub-needle, It becomes very difficult to receive the load reliably. In particular, in the case of a movement in which the base plate that is the base material is formed by injection molding of a polymer resin, because the absolute rigidity of the base plate is low, the base plate bends due to the load at the time of attaching the needle. There is a possibility that problems such as disengagement may occur, such as the engaging part of the adjacent gear train and gear disengaging, or the upper parts that are overlapping in plan are pushed up due to the bending of the main plate. is there.

  In addition, the train wheel to which the pointer is attached is generally formed by metal cutting because a large load is applied. In this case, if the base plate that is the holding member is a polymer resin, there is too much difference in material hardness between the base plate and the train wheel, so the base plate receives a compressive load due to the load at the time of attaching the needle, and the portion is dented. Due to this, holding of the train wheel becomes unstable, current consumption is not stable, and there is a possibility that the movement unevenness increases.

  Various ideas have been made for this problem, that is, how to establish a structure for stably receiving the load with the needle of the sub-needle. For example, in Patent Document 1, in the analog multi-needle movement of the structure in which the position of the auxiliary needle wheel that rotates in one and a half hours in conjunction with the hour wheel overlaps with the battery in a plane, and the base plate is molded from a polymer resin. A structure for receiving a load with a needle is disclosed.

  In the present invention, as shown in FIG. 1 of Patent Document 1, the main plate 6 which is a molded product of a polymer resin is used, and the auxiliary needle wheel 1 is arranged at a position overlapping the battery 1 in a plane. Here, the part which accommodates the sub needle wheel 1 is made into a separate part as a frame 11. In addition, after assembling the secondary needle wheel 2 to the frame 11, the receiving plate 12 is assembled to form a separate unit as an auxiliary needle wheel block, and finally the secondary needle wheel block has a predetermined tightening allowance on the receiver 13. It is press-fitted and fixed.

In this conventional example, the load F when the sub-needle 3 is pushed and fixed to the sub-needle wheel 2 is transmitted to the frame 11 via the body portion 2c of the sub-needle wheel shaft. Since the frame 11 is in wide contact with the base plate 6 in a plane and the load with needles is widely dispersed and transmitted to the base plate 6, it is possible to prevent defects such as deformation at the time of needle attachment. Similarly, the load at the time of needle removal is received by the receiving plate 12 to prevent deformation of the receiving part.
Japanese Utility Model Publication No. 1-171394 (first figure, pages 5-10)

  In this conventional example, it is considered that a predetermined effect can be obtained with respect to defects such as deformation due to a load at the time of attaching a needle and disengagement, but it has the following problems.

  First of all, depending on the material of the frame 11, a predetermined effect may not be obtained. That is, since the frame 11 has a considerably deep shape and is difficult to be plastically processed, it is considered that the frame 11 is formed by an injection molding process using a polymer resin or by cutting a metal. When the material of the frame 11 is a polymer resin, there is an excessive difference in hardness between the material of the auxiliary needle wheel 2 formed of metal and the material, and therefore, when the auxiliary needle 3 is pressed and fixed, the load F is applied to the auxiliary needle wheel barrel portion 2c. In order to push the frame 11 through, there is a possibility that a dent will be formed in the frame 11 with substantially the same shape as the body portion 2c. In order to prevent this, it is necessary to make the body portion 2c as large as possible to disperse the surface pressure applied to the frame 11 due to the load F with the needle. Since the moving area becomes large, there is a problem that the frictional resistance increases and the current consumption during hand movement increases. That is, there is no problem in the case of a 24-hour vehicle or the like in which a relatively large driving force is easily obtained, but the structure is difficult to divert to a small second hand timepiece or a second chronograph with a small driving force.

When the frame 11 is made of metal, it is expected that there will be no functional problem, but the component unit price will be high. Moreover, when both the receiving plate 12 and the frame 11 are formed of metal, it is expected that the workability for assembling the receiving plate 12 is extremely deteriorated.

  Secondly, there is a problem that the position accuracy of the sub-hand wheel 2 is likely to be incorrect. The sub-hand wheel 2 has a structure in which the rotation of the hour wheel 15 is transmitted to the transmission wheel 4 and the transmission wheel 4 drives the sub-hand wheel 2. Here, the transmission wheel 4 is pivotally supported by a tenon hole provided in the main plate 6 and the receiver 13, but the auxiliary needle wheel 2 meshing with the transmission wheel 4 is supported by the frame 11 and the receiving plate 12. Has been. That is, since the parts supporting the sub-needle wheel 2 and the transmission wheel 4 are different, it can be said that the position accuracy of the parts is likely to be distorted due to variations in processing accuracy of each part. Specifically, considering the base plate 6 that pivotally holds the transmission wheel 4 as a reference, the sub-hand wheel 2 has a positional accuracy variation of the receiver 13 with respect to the base plate 6 and the positioning portion of the frame 11 in the receiver 13. The structure is affected by the variation of 13a and the variation of the positional accuracy of the bearing hole with respect to the positioning portion in the frame 11. As in this example, if the train wheel is decelerated so that it rotates once in 24 hours, the influence is small. There is a possibility that the current consumption of the hand movement is not stable, or that quality trouble such as uneven hand movement may be caused.

  Third, it can be said that the sub-needle 2 has a structure that is easy to lift. That is, since the receiving plate 12 is fixed to the frame 11, if the bearing hole position of the receiving plate 12 is shifted due to poor mounting of the receiving plate 12, the auxiliary needle wheel 2 is tilted and the auxiliary needle 3 is raised. It becomes easy. Moreover, if the frame 11 is pushed and fixed to the receiver 13 and the frame 11 is inclined and pushed to the receiver 13, it similarly causes the inclination of the auxiliary needle wheel 2.

  Fourthly, it is a structure that makes it difficult to make the watch movement thin. That is, in order to receive the load with needle F by the base plate 6 that is in wide contact with the frame 11, the base plate 6 must be disposed on the frame 11 without fail. As long as the base plate 6 is molded from a polymer resin, a certain amount of thickness is necessary to increase the rigidity. As a result, it can be said that the timepiece movement becomes thicker by the thickness of the base plate 6.

  In addition, there is a problem that shavings of the receiver 13 generated when the frame 11 is pushed around the transmission wheel 4 and easily cause a stop of the hand movement. In this structure, a small second hand wheel train with particularly weak driving force is included. There seems to be a problem to apply to.

  The present invention solves these problems, and can stably receive a load with a hand while maintaining high positional accuracy, and can be produced at a low cost. The structure is proposed.

  In order to achieve the above object, the gist of the present invention is to provide a pointer wheel having a pointer mounting shaft portion, a gear portion, a shaft portion supported by a receiving member and a tenon portion, and the shaft portion of the pointer wheel. A first receiving member having a bearing portion for supporting; and a second receiving member having a horn receiving portion for supporting the horn portion of the pointer wheel. In a timepiece that is disposed between the first receiving member and the second receiving member and at least one of the two receiving members is made of a polymer resin, the surface of the second receiving member facing the gear portion is made of metal. A reinforcing plate is provided. As a result, it is possible to realize a structure that can stably receive a load with a needle without causing deformation of the polymer resin receiving member due to a load at the time of attaching a needle or generating an indentation by a pointer wheel. Become.

  In addition, the reinforcing plate has an opening for passing the horn part, and the opening part is loosely coupled with the horn part. As a result, it is possible to realize a structure that can stably receive a load with a needle while minimizing the influence on the distance between the centers of the ridge portions of each train wheel.

Further, the second receiving member is a ground plate. As a result, it is possible to realize a structure that can stably receive a load with a needle by using a polymer resin base plate having a higher degree of freedom in shape.

  The second receiving member is mounted on a metal base plate having an opening on a surface opposite to the surface on which the reinforcing plate is disposed, and the side receiving portion faces the opening of the base plate. The reinforcing plate is disposed so as to cross the opening of the ground plate and partially overlap the ground plate when viewed in plan. As a result, even when the first and second receiving members are formed of a polymer resin having an excellent degree of freedom in shape, the load at the time of attaching the needle can be stably obtained by using a metal base plate as a backup member. It is possible to realize a structure that can be received.

  The pointer wheel is a small second hand wheel. As a result, compared to a train wheel having a relatively large driving force, such as a 24-hour secondary wheel that rotates once in 24 hours, an increase in current consumption is also obtained for a secondary wheel train having a shorter driving cycle and a weak driving force. In addition, it is possible to provide a structure that can stably receive the load at the time of needle attachment without increasing the needle movement load.

  In the present invention, in the timepiece movement in which at least one of the two receiving members for pivotally holding the pointer is formed of a polymer resin, other parts are damaged by a load at the time of attaching a needle with a simple structure. We presented a structure that does not have to worry about being deformed or deformed, and that has minimal performance on the watch. Specifically, in an analog timepiece movement having a small second hand which is a sub-hand in addition to the center of the timepiece, a metal reinforcing plate formed by pressing is provided between the receiving member formed of a polymer resin and the second wheel. Arranged. In addition, the reinforcing plate and the shaft portion of the small second wheel are loosely engaged, and the shaft support of the small second wheel itself is held by the receiving member, so that the position of the reinforcing plate relative to the watch movement is affected by variations in processing accuracy. There was no pivot support structure. As a result, in an analog multi-hand timepiece movement, the polymer resin receiving member is deformed by the load at the time of attaching the needle while the construction cost is kept to a minimum while suppressing the increase in the processing cost of the parts, or by the pointer wheel. It has become possible to realize a structure that can stably receive a load with a needle without causing damage or indentation to other parts.

  As an embodiment, the present invention has been described by exemplifying an analog multi-hand timepiece movement having a small second hand as a secondary hand, but the scope of application thereof is not limited to this. For example, the secondary hand may be a secondary hand that rotates once every 24 hours, or a secondary hand that indicates the chronograph measurement time, instead of the small second hand. For analog watches with hour, minute, and second hands in the center, for example, long-life type analog watches in which large-sized batteries are arranged in a flat manner in the center. It can also be applied to a watch movement that cannot be received, and its application range can be said to be extremely wide, and it can be said that the effect of the present invention is extremely great.

  Hereinafter, details of the present invention will be described based on the drawings.

  FIG. 1 is a cross-sectional view of a main part schematically showing a cross-sectional arrangement relationship of each component around a sub hand of an analog multi-hand timepiece movement showing an embodiment of the present invention. FIG. 2 is a plan view of the main part showing the arrangement relationship around the secondary needle wheel train with respect to the main plate around the secondary needle. In FIG. 2, for the sake of simplicity, the train wheel group other than the train wheel around the auxiliary needle, the first receiving member, and the second receiving member are not shown. In the following description, the dial side shown in FIG. 1 is referred to as the downward direction, and the train wheel receiving side is referred to as the upward direction.

3 is a partially enlarged cross-sectional view of the peripheral portion of the small second hand wheel train of the analog multi-hand watch movement shown in FIGS. 1 and 2, and FIG. 4 is a diagram showing repair of the analog multi-hand movement shown in FIGS. It is a partial expanded sectional view which shows the state in the case of pulling out the small second hand at the time.

  1 and 2, 101 is a base plate that is a base material for holding a watch part, 102 is a coil that is a component part of a step motor, 103 is a minute hand, 104 is an hour hand, 105 is an hour hand 104, and is fixed. Hour wheel which is a train wheel for driving the hour hand 104, 106 is a center wheel which is a train wheel for driving the minute hand 104, 107 is pushed and fixed, 107 is a small second hand, 108 is a push-fixed small second hand 107, and a small second hand A second wheel 109 is a wheel train for driving 107, and a fifth wheel train 109 is used to decelerate the rotation of a rotor, which is a component of a step motor (not shown), and transmit a driving force to the hour hand 104, the minute hand 103, and the small second hand 107. No. 110, 110 is engaged with the shaft of the fifth wheel 109, the lower fifth kana is an intermediate wheel that rotates in synchronization with the fifth wheel 109, and 111 is the second fifth kana 110 rotation to the second wheel 108. The second intermediate wheel (1), 112 that is the train wheel that reaches the second intermediate wheel (2) 113 that transmits the rotation of the second intermediate wheel (1) 111 to the second wheel 108, 113 is the rotation of the fifth wheel 109 The fourth wheel 114, which is a wheel train that decelerates and transmits the driving force to the central wheel 106 via the third wheel (not shown), 114 is the fifth wheel 109, the fourth wheel 113, the rotor and the third wheel (not shown), etc. A train wheel bridge 115, which is a plate-like component that holds the train wheel in a pivotal support, is disposed between the train wheel bridge 114 and the main plate 101, and holds a back cover, a battery, and the like as a time correction mechanism using a crown (not shown). The winding stem spacer, which is an injection molded part made of a polymer resin, includes a dial 116, a dial 117, and a polymer resin that is disposed between the main plate 101 and the dial 116 and supports a calendar drive wheel train (not shown). The second receiving member 118 is a second receiving member which is an injection molded part of The first receiving member is an injection-molded part made of a polymer resin that is disposed between the dial 17 and the dial 116 and supports the second driving wheel 108, the second intermediate wheel (2) 112, and other calendar driving wheel trains (not shown). It is.

  1 to 3, the second wheel 108 has a structure in which a gear 108a is pushed and fixed to a shaft portion 108b. The shaft portion 108b is a bearing portion 118a of the first receiving member 118, and the lever portion 108c is a second receiving portion. It is positioned in a planar manner by being held by a bearing portion 117a formed on the member 117. Further, by being held between the second receiving member 117 and the first receiving member 118, positioning in the cross-sectional direction is performed.

  In addition, the portion above the main plate 101, that is, the portion of the train wheel bridge 114 that holds the main plate 101 and the coil 102, the fifth wheel 109, the fourth wheel 113, and both wheel trains has the same structure as the existing analog three-hand watch movement. is there. In other words, this analog multi-hand timepiece movement has a structure in which parts below the base plate 101 are added to the basic movement 100, and by using the existing parts to the maximum, the production cost of new parts is reduced. The assembly line is designed to be shared. However, because the multi-hand watch movement is designed by using the basic movement 100 in common, the coil 102 which is a component of the basic movement 100 is arranged directly above the second wheel 108 to which the small second hand 107 is attached. In order to reduce the thickness, an opening 101 a is formed in the base plate 101 to accommodate the coil 102. That is, because the opening 101a of the main plate 101 overlaps with the plane directly above the second wheel 108, it is difficult to directly receive the pushing force F when the small second hand 107 is attached with a jig or the like. It was.

  The second receiving member 117 is formed by injection molding made of a polymer resin having a high degree of freedom in terms of holding a cross section of a calendar component (not shown). When the small second hand 107 is attached to the second wheel 108, the second receiving member 117 is bent by the pushing force F of the small second hand 107, and the side portion 108 c of the second wheel 108 comes into contact with the coil 102 to The structure is likely to cause problems such as damaging 102.

Therefore, as shown in FIG. 1, the second receiving member 117 is characterized in that a reinforcing plate 119 is disposed in the vicinity of the region facing the gear portion 108 a of the second wheel 108. The reinforcing plate 119 is positioned by two bosses formed in the second receiving member 117 at positions corresponding to the positioning holes 119b and 119c, and its planar shape is kept to a minimum necessary size. Thereby, reduction of the processing cost and material cost of components is aimed at.

  This reinforcing plate 119 is formed by pressing a stainless steel plate, which is a flat metal plate, so that the influence on the timepiece movement can be minimized. The reinforcing plate 119 of the present embodiment is made of a highly rigid stainless material with an emphasis on rigidity, but may be made of a highly workable metal plate material such as free-cutting brass. However, from the viewpoint of being a reinforcing material, it is desirable to use a metal material having as high rigidity as possible.

  Further, since the reinforcing plate 119 is a part formed by pressing a metal plate material, there is a problem that warpage is likely to occur during processing. In contrast, the present invention is characterized in that a plurality of convex shapes 118b are formed on the first receiving member 118, and the convex shapes 118b are in contact with the reinforcing plate 119. As a result, the cross section of the reinforcing plate 119 is positioned and floating due to the warping of the reinforcing plate 119 is prevented, and the current consumption of the timepiece movement is prevented from increasing due to the reinforcing plate rubbing against the second gear 108a, thereby stably reinforcing. It is possible to fix the plate 119 to the movement.

  In this timepiece movement, the second wheel 108 is used for removing the small second hand 107 by the second wheel hand seat 122 which is a metal thin leaf spring part interposed between the second wheel 108 and the first receiving member 118. Other than the above, the needle is always moved while being pressed against the reinforcing plate 119. Here, by minimizing the diameter of the barrel portion 108d of the second wheel shaft pressed against the reinforcing plate 119, the sliding area between the second wheel 108 and the reinforcing plate 119 during normal hand movement is minimized, An increase in current consumption due to sliding resistance is suppressed.

  As described above, the rigidity of the second receiving member 117 is improved by the rigidity of the reinforcing plate 119 by arranging the reinforcing plate 119 so as to overlap the bridge-shaped portion of the second receiving member 117 overlapping the opening 101a of the base plate 101. It is possible to make it. However, this is not sufficient as the effect because the reinforcing plate 119 and the second receiving member 117 bend together with respect to the load F.

  On the other hand, the present invention is characterized in that the reinforcing plate 119 and the ground plate 101 are overlapped in a plurality of predetermined regions 120a and 120b as shown in FIG. That is, by having such overlapping regions 120a and 120b, the load F at the time of attaching a needle is transmitted to the reinforcing plate 119 via the upper body portion 108d of the second wheel 108, and the ground plane is transmitted via the overlapping regions 120a and 120b. 101. The load transmitted to the main plate 101 is transmitted to the train wheel bridge 114 via the winding stem spacer 115 that is substantially in close contact with the main plate 101.

  That is, when the train wheel bridge 114 is reliably received by the needle-attached jig 121, the load F at the time of needle attachment can be received by the needle-attached jig 121, and the second receiving member 117 of the second attachment member 117 due to the load at the time of needle attachment is obtained. It can be said that it is possible to prevent quality defects due to deformation. Further, by arranging the overlapping regions 120a and 120b at a substantially diagonal position with respect to the arrangement position of the second wheel 108 that is the point of action of the load F, the overlapping of the reinforcing plate 119 is inclined when the small second hand 107 is fixed. Therefore, it is possible to perform the needle attaching operation stably.

  Next, in this structure, a state when the small second hand 107 is pulled out for repair or the like is shown in FIG. In this case, since the small second hand 107 is pulled in the direction of the dial plate 116 by the needle pulling load F2, the second wheel 108 is pressed against the first receiving member 118 side by the area of the lower body attaching portion 108e. Considering the direction of the needle pulling load F2, it is possible to interpose a plate-like reinforcing plate having a shape similar to the reinforcing plate 119 between the lower body-attached portion 108e and the first receiving member 118. In this case, This increases the number of parts and increases costs.

  On the other hand, the present invention is characterized in that the area of the lower body part 108e is sufficiently large as compared with the upper body part 108d. That is, since the load F2 applied when the small second hand 107 is pulled out is distributed over a larger area and is applied to the first receiving member 118, it can be said that there is little concern that the first receiving member 118 is deformed when the needle is pulled out. As shown in FIG. 3, the second wheel 108 is always pressed against the reinforcing plate 119 by the second wheel hand seat 122 during normal hand movement, and a predetermined cross-sectional clearance is always provided between the lower body attaching portion 108e and the first receiving member 118. Therefore, even if the diameter of the lower body portion 108e is made sufficiently large, there is no influence on the sliding resistance during normal hand movement. Therefore, it can be said that the current consumption at the time of hand movement is not affected.

  In other words, the reinforcing plate 119 is added only to the side on which the second wheel 108 always slides during normal hand movement, and the side having the cross-sectional clearance is not added, thereby avoiding the complexity of the structure and minimizing the number of additional parts. It is possible to ensure stable assembly and disassembly.

  Further, the second wheel hole 119a of the reinforcing plate 119 has a tenon portion 108c of the second wheel 108 and a predetermined plane gap 123, and does not have a bearing function of the second wheel 108. That is, the reinforcing plate 119 is a plate-like component for reinforcement only, and the second receiving member 117 has a feature that the bearing function itself is provided.

  The reason for this will be described below. As described above, the reinforcing plate 119 is positioned by two bosses (not shown) formed integrally with the second receiving member 117. That is, the position of the reinforcing plate 119 is determined by the second receiving member 117. The second receiving member 117 has a structure in which the position with respect to the base plate 101 is determined by two bosses (not shown). That is, it is possible to provide the reinforcing plate 119 with the bearing function of the second wheel 108. In this case, the positional accuracy error of the second wheel 108 with respect to the main plate 101 is the position of the second receiving member 117 with respect to the main plate 101. The accuracy error and the position accuracy error of the reinforcing plate 119 relative to the second receiving member 117 are affected. On the other hand, as in the present invention, if the reinforcing plate 119 and the second wheel 108 are set as idle, and the second wheel 108 is positioned by the bearing portion 117a of the second receiving member 117, the position of the second wheel 108 is determined. This is because the accuracy error depends only on the positional accuracy error of the second receiving member 117 with respect to the main plate 101, and the positional accuracy of the second wheel 108 can be further improved.

  Furthermore, unlike the case of using as a bearing, the positioning portion accuracy of the reinforcing plate 119 and the hole diameter accuracy of the second wheel hole 119a can be made relatively rough, and the processing cost of the reinforcing plate 119 can be reduced. It becomes.

  By adopting the structure as described above, this analog multi-hand timepiece movement can be added to a simple structure, thereby reducing the position accuracy of the pointer wheel train and minimizing the increase in the thickness of the timepiece movement. Thus, it is possible to realize a structure that can stably receive the load when the pointer is attached.

  Next, a second embodiment of the present invention will be described. FIG. 5 is a cross-sectional view of an essential part showing a second embodiment of the present invention. In FIG. 5, reference numeral 200 denotes a ground plane, and 201 denotes a battery. In addition, about the component of the same function as 1st embodiment, the same name and the same number are attached | subjected and the detailed description is abbreviate | omitted.

  The timepiece of the second embodiment shown in FIG. 5 differs from the first embodiment in that the base plate 200 is formed by injection molding using a polymer resin. That is, by forming the bearing portion of the second wheel 108 directly on the main plate 200 and integrally forming the positioning boss of the reinforcing plate 119, it is possible to configure an analog multi-hand timepiece movement with a structure having a smaller number of parts.

  In this example, a load with a needle can be received by the battery 201, but the battery 201 has a large variation in height as compared with other components of the watch movement, and depending on the variation in the height of the battery 201, There is a gap in cross section between the needle-attached jig and the battery 201, and as a result, the second wheel 108 and the second intermediate wheel (2) 112 may be disengaged. Even in such a case, if the train wheel bridge 114 is received by adding the reinforcing plate 119, the load at the time of attaching the needle can be directly received via the reinforcing plate 119 and the main plate 200. It is possible to provide a movement structure that can stably perform a needle attaching operation without increasing variation in positional accuracy.

It is principal part sectional drawing which shows the 1st Example of this invention. It is a principal part top view which shows the train wheel arrangement | positioning around a small second hand which shows the 1st Example of this invention. It is a principal part cross-sectional enlarged view which shows the structure of the small second hand which shows the 1st Example of this invention. It is a principal part expanded sectional view which shows the state at the time of the needle extraction of the small second hand which shows the 1st Example of this invention. It is principal part sectional drawing of the surroundings of a small second hand of the analog multi-hand timepiece movement which shows the 2nd Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Base movement 101 Ground plate 101a Ground plate opening 102 Coil 103 Minute hand 104 Hour hand 105 Central wheel 106 Hour wheel 107 Small second hand 108 Second wheel 108a Second gear 108b Shaft portion 108c Hose portion 108d Upper body portion 108e Lower body portion 109 Fifth wheel 110 Lower 5th Kana 111 second intermediate car (1)
112 second intermediate car (2)
113 No. 4 wheel 114 Wheelset holder 115 Winding stem spacer 116 Dial plate 117 Second receiving member 117a Bearing portion 118 First receiving member 118a Bearing portion 118b Convex shape 119 Reinforcement plate 119a Loose hole 119b Positioning hole 119c Positioning hole 120a Overlapping region 120b Overlapping area 121 Jig with needle 122 Second wheel seat 123 Plane gap 200 Ground plate 201 Battery

Claims (5)

A pointer wheel having a pointer mounting shaft portion, a gear portion, a shaft portion supported by the receiving member, and a relief portion;
A first receiving member having a bearing portion for supporting the shaft portion of the pointer wheel; and a second receiving member having a horn receiving portion for supporting the horn portion of the pointer wheel; In the timepiece in which the gear is disposed between the first receiving member and the second receiving member, and at least one of the two receiving members is made of a polymer resin.
A timepiece having a metal reinforcing plate disposed on a surface of at least one of the two receiving members opposed to the gear portion. 2. The timepiece according to claim 1, wherein the reinforcing plate has an opening through which the horn part is passed, and the opening is loosely coupled with the horn part. The second receiving member is mounted on a metal ground plate having an opening on the surface opposite to the surface on which the reinforcing plate is disposed, and the side receiving portion is opposed to the opening of the ground plate. Located
The said reinforcing plate is arrange | positioned so that a part may overlap the said ground plate across the opening part of the said ground plate when planarly viewed. clock. The timepiece according to claim 1, wherein the second receiving member is a main plate. The timepiece according to claim 1, wherein the pointer wheel is a small second hand wheel.

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