JP4593339B2 - Clock pointer mounting structure - Google Patents

Description

  The present invention relates to a watch pointer mounting structure.

As a technique for improving the accuracy of attaching the pointer, there is a technique described in Patent Document 1, for example. In the pointer mounting structure of Patent Document 1, the cross-sectional shape of the pointer shaft and the hole portion of the pointer into which the pointer shaft is inserted have a concave portion and a convex portion, respectively. To be positioned.
Japanese Patent Laid-Open No. 9-113641

  However, there is a case where the positional deviation between the pointer and the dial cannot be reduced only by reducing the positional deviation between the pointer and the mechanism for rotating the pointer. For example, this is a case where an attachment error occurs between the mechanism for rotating the pointer and the exterior on which the dial is mounted. In addition, misalignment between the pointer and the dial may occur due to backlash, gear train mounting accuracy, shaft forming accuracy, and the like.

  An object of the present invention is to provide a watch pointer mounting structure that can reduce the amount of deviation between the pointer and the dial.

A watch pointer mounting structure according to a first aspect of the present invention includes a pointer shaft having a pointer mounting portion having a point-symmetrical non-circular cross section with a center of rotation as a symmetric point, and the pointer mounting portion inserted therethrough. A seat having a seat-side mounting hole having a shape capable of suppressing rotation with respect to the portion, and a seat-side fixing hole provided at a position eccentric from the seat-side mounting hole; and the pointer mounting portion is inserted, and the pointer mounting portion A guide-side mounting hole having a shape capable of rotating, a recess for fitting the seat on the back side, and a pointer-side fixing hole provided at a position facing the seat-side fixing hole of the fitted seat And a fixing means that is inserted into the seat side fixing hole and the pointer side fixing hole to fix the pointer to the seat, and includes the seat side fixing hole and the pointer side fixing hole. At least one of the fixing means in the direction of rotation of the pointer Ri Ah in the clearance hole having a gap, said seat and said recess is also turned over the seat having a shape to be fitted in the recess.

A watch pointer mounting structure according to a second aspect of the present invention includes a pointer shaft having a pointer mounting portion having a point-symmetrical non-circular cross section with a rotation center as a symmetric point, and the pointer mounting portion being inserted therethrough. A seat-side mounting hole having a shape capable of suppressing rotation with respect to the portion, a first seat-side fixing hole provided at a position on one symmetrical axis of the cross section of the pointer mounting portion, and the first seat-side fixing It is opposed to the hole and the rotation center, and is located at a position deviated from the one symmetry axis by a predetermined amount, and the distance from the rotation center is the same as the first seat side fixing hole, a seat and a second seat side fixing hole of the same diameter as said first seat side fixing hole, the pointer attachment portion is inserted, and guidance-side mounting hole of the pointer attachment portion is rotatable shape, rear parts in the recess to be fitted provided with the seat, said first seat of the seat a distance from the rotation center is fitted above A fixing hole and a coincident position, the first first hands side fixing hole of the same diameter and the seat-side fixing hole, in a position the same with the second seat side fixing hole, the one axis of symmetry A second pointer-side fixing hole having a long hole extending with the same diameter as the second seat-side fixing hole over a position shifted from the first side by the predetermined amount and a position shifted to the other side by the predetermined amount. And the first seat-side fixing hole and the first pointer-side fixing hole, or the second seat-side fixing hole and the second pointer-side fixing hole to be inserted into the seat of the pointer. First fixing means for fixing the position of the pointer in the direction of rotation of the pointer, and the second pointer side fixing hole is a clearance hole having a gap with respect to the first fixing means in the direction of rotation of the pointer, The seat and the recess fit into the recess even if the seat is turned 180 degrees or upside down. Capable of shape.

Preferably, the seat further includes second fixing means for rotating or turning over 180 degrees so as to be fitted into the recess, and fixing the position of the pointer in the direction of pointer rotation relative to the seat, the second fixing means. When the first fixing means is inserted through the first seat side fixing hole and the first pointer side fixing hole, the second seat side fixing hole and the second pointer side fixing hole are fixed. When the first fixing means is inserted through the second seat side fixing hole and the first pointer side fixing hole, the first seat side fixing hole and the second seat side fixing hole are inserted through the hole. It is inserted through the pointer side fixing hole.

Preferably, further comprising third fixing means for fixing a position of the pointer in the direction of rotation of the pointer with respect to the seat, the seat being provided on another symmetry axis orthogonal to the one symmetry axis, A third seat-side fixing hole having the same diameter as the first and second seat-side fixing holes, and the pointer is located on a second straight line orthogonal to the first straight line from the rotation center. The distance is provided at the same position as the third seat side fixing hole, and the position deviated from the second straight line to the one side by the predetermined amount and the other side by the predetermined amount in the pointer rotation direction. And a third pointer-side fixing hole having a long hole shape extending in the same diameter as the first and second seat-side fixing holes over the position, and the third fixing means includes the third seat A side fixing hole and the third pointer side fixing hole are inserted.

  Preferably, the predetermined amount is ½ of the maximum deviation amount of the pointer shaft.

  Preferably, the seat is provided with a marking portion indicating the position of the one symmetry axis.

  In the timepiece device mounting structure according to the third aspect of the present invention, a pointer shaft having a pointer mounting portion having a non-circular cross section with a line symmetric with respect to a straight line passing through the rotation center, and the pointer mounting portion are inserted, A seat having a seat side mounting hole having a shape capable of suppressing rotation with respect to the pointer mounting portion and a seat side fixing hole provided at a position shifted from the axis of symmetry, and the pointer mounting portion is inserted, and the pointer mounting A pointer side mounting hole having a rotatable shape, and a pointer side fixing hole having a distance from the rotation center at the same position as the seat side fixing hole and having the same diameter as the seat side fixing hole And a fixing means that is inserted into the seat side fixing hole and the pointer side fixing hole and fixes the position of the pointer in the pointer rotating direction with respect to the seat.

According to the timepiece pointer mounting structure of the present invention, the amount of displacement between the hands and the dial can be reduced.

Moreover, even when the timepiece pointer mounting structure of the present invention is used, the timepiece does not become thick, and it is not necessary to make a major design change from the conventional product.

First Embodiment FIG. 1 is a front view showing an appearance of a timepiece device 1 according to a first embodiment of the present invention. The timepiece device 1 includes a housing 2, a dial plate 3, a minute hand 4M and an hour hand 4H as pointers.

  In the following, M is assigned to the configuration relating to the minute hand, H is assigned to the configuration relating to the hour hand, and when there is no need to distinguish between both, M or H is omitted, for example, simply referred to as the pointer 4 Sometimes.

  The timepiece device 1 is configured as a relatively large timepiece device installed outdoors or the like. For example, the length of the pointer 4 is 50 cm to 1 m. On the dial 3, indicators for reading the time indicated by the hands 4 are arranged along the rotation direction of the hands, and for example, a time scale 5a and a minute scale 5b are provided.

  FIG. 2 is a cross-sectional view of the timepiece device 1. The timepiece device 1 includes a minute hand movement 11M for driving the minute hand 4M and an hour hand movement 11H for driving the hour hand 4H. Therefore, even a relatively large pointer can be driven by a general-purpose movement. Note that the minute hand movement 11M and the hour hand movement 11H include means normally provided by a general-purpose movement such as a driving source (not shown), a transmission means, a minute hand wheel, and an hour hand wheel.

  Both the minute hand movement 11M and the hour hand movement 11H are movements for radio wave correction watches. That is, the minute hand movement 11M and the hour hand movement 11H are not shown, but receive means for receiving a radio signal including a time code, position detection means for detecting the rotational position of the gear train in the movement, Control means for correcting the rotational position of the pointer based on the radio signal received by the receiving means and the rotational position detected by the position detecting means. Thereby, the timepiece device 1 functions as a radio wave correction timepiece, and the minute hand 4M and the hour hand 4H maintain an appropriate relative position to each other without synchronizing the minute hand movement 11M and the hour hand movement 11H.

The driving force of the minute hand movement 11M is transmitted to the minute hand 4M by the minute hand wheel train 12M. The minute hand wheel train 12M, minute hand movement 11 M center wheel fixedly provided with respect to (not shown), a drive transmission wheel 13M to rotate the center wheel and integral with the drive convey geared into the gear 13M A transmission gear 14M, a minute transmission pinion 15M that rotates integrally with the transmission gear 14M, and a minute hand wheel 16M that meshes with the minute transmission pinion 15M.

  The driving force of the hour hand movement 11H is transmitted to the hour hand 4H by the hour hand wheel train 12H. The hour hand wheel train 12H is fixedly provided to a minute hand wheel (not shown) of the hour hand movement 11H, and a transmission gear 13H rotating integrally with the minute hand wheel and a transmission meshing with the driving transmission gear 13H. A gear 14H, a transmission pin 15H that rotates integrally with the transmission gear 14H, and an hour hand wheel 16H that meshes with the transmission pin 15H are provided.

  The same gear is used for the minute hand train wheel 12M and the hour hand train wheel 12H. That is, the drive transmission gear 13M, the transmission gear 14M, the minute transmission pinion 15M, and the minute hand wheel 16M are the same gears as the drive transmission gear 13H and the transmission gear wheel 14H, and the hour transmission pinion 15H and the hour hand wheel 16H, respectively. Then, the minute hand movement 11M is driven at 12 times the speed of the hour hand movement 11H.

  The rotation of the minute hand wheel 16M is transmitted to the minute hand 4M by a minute hand shaft 18M as a pointer shaft fixed to the rotation center of the minute hand wheel 16M and the rotation center of the minute hand 4M. The rotation of the hour hand wheel 16H is transmitted to the hour hand 4H by the hour hand shaft 18H as a pointer shaft fixed to the rotation center of the hour hand wheel 16H and the rotation center of the hour hand 4H. The hour hand shaft 18H is formed in a pipe shape, and the minute hand shaft 18M is press-fitted into the rotation center of the hour hand shaft 18H.

  FIG. 3 is a cross-sectional view showing a mounting structure of the minute hand 4M and the hour hand 4H. An hour hand 4H is attached to the hour hand shaft 18H via a seat 31H, a bolt 32H, a nut 33H, and a retaining member 34H. A minute hand 4M is attached to the minute hand shaft 18M via a seat 31M, a bolt 32M, a nut 33M, and a retaining member 34M. Specifically, it is as follows.

  FIG. 4 is an exploded perspective view of the attachment structure of the pointer 4. Note that the attachment structure of the minute hand 4M and the attachment structure of the hour hand 4H are the same except that the minute hand shaft 18M is inserted into the hour hand shaft 18H and the retaining member 34H. Without explaining.

The pointer shaft 18 has a pointer mounting portion 18a to which the seat 31 and the pointer 4 are mounted. The cross-sectional shape of the pointer mounting portion 18a is formed in a point-symmetric non-circular shape with the rotation center of the pointer shaft 18 as a symmetric point. For example, a part of the circle and a part facing the part are cut off. It is formed in an oval shape. Further, the pointer shaft 18 has a male screw portion 18b to which the retaining member 34 is fixed on the tip side of the pointer mounting portion 18a.

The seat 31 is formed in a disk shape. However, the planar shape and cross-sectional shape of the seat 31 may be appropriate shapes. The seat 31 has a mounting hole 31a through which the pointer mounting portion 18a is inserted . The mounting hole 31a is formed in a shape that fits with the pointer mounting portion 18a, that is, an oval shape, and the seat 31 cannot rotate with respect to the pointer mounting portion 18a inserted through the mounting hole 31a. Further, the seat 31 has a through hole (fixed hole) 31b through which the bolt 32 is inserted at a position eccentric from the mounting hole 31a. The number of through holes 31b may be appropriately set within a range of 1 or more. For example, two through holes 31b are provided with the attachment hole 31a interposed therebetween.

  The pointer 4 has a mounting hole 4a into which the pointer mounting portion 18a is inserted. The mounting hole 4a is formed in a circular shape, and the circular portion of the pointer mounting portion 18a is fitted therein. Therefore, the pointer 4 is rotatable with respect to the pointer mounting portion 18a inserted into the mounting hole 4a. The pointer 4 has a through hole 4b through which the bolt 32 is inserted. The through hole 4b is provided to face the through hole 31b. That is, when the pointer shaft 18 is inserted into the mounting hole 4 a of the pointer 4 and the mounting hole 31 a of the seat 31, the same circumference (equal distance) as the through-hole 31 b of the seat 31 is centered on the rotation center of the pointer shaft 18. It is provided at the position. The through hole 4b has a larger diameter than the through hole 31b. A concave portion 4c (see FIG. 3) into which the seat 31 is fitted is provided on the back side of the pointer 4 (in the depth direction in the drawing of FIG. 4). For example, the recess 4 c has a circular planar shape (a shape viewed from the seat 31), and the depth of the recess 4 c is the same as the thickness of the seat 31.

The bolt 32 is a fixing means, and has a bolt head diameter larger than the through hole 4 b of the pointer 4 and a shaft diameter smaller than the through hole 4 b of the pointer 4. And a clearance gap arises between the volt | bolt 32 penetrated by the through-hole 4b, and the through-hole 4b. That is, the through hole 4b is a so-called clearance hole (fool hole). The bolt 32 is inserted into the through hole 4 b of the pointer 4 and the through hole 31 b of the seat 31, and is screwed with the nut 33 to fix the pointer 4 and the seat 31.

The retaining member 34 has a female threaded portion 34a, and is screwed into the male threaded portion 18b of the pointer shaft 18 inserted through the mounting hole 31a of the seat 31 and the mounting hole 4a of the pointer 4, so that the seat 31 and The needle 4 is prevented from coming off from the needle shaft 18. Note that the retaining member 34 H of the mounting structure of the hour hand 4H, holes minute hand shaft 18M is inserted is provided.

  Note that the position of the pointer mounting portion 18a, the shape of the mounting hole 31a of the seat 31, the through hole 31b of the seat 31, and the through hole 4b of the pointer 4 is, for example, the pointer shaft 18 at the null position (for example, 12 o'clock position). Sometimes, the pointer 4 is also set to point to the zero return position. The pointer shaft 18 is set when the pointer shaft 18 and the train wheel 12 are assembled so that the pointer shaft 18 is positioned at the zero return position when the position detection means of the movement 11 detects the zero return position, for example.

  A procedure for attaching the hands 4 in the timepiece device 1 having the above configuration will be described. First, in the configuration shown in FIG. 2, the train wheel 12, the pointer shaft 18, the dial plate 3, and the like are attached to the upper plate 7, the middle plate 8, the lower plate 9 and the like, and the pointer 4 and the seat 31 are attached to the pointer shaft 18. (See FIG. 4) is attached, and the hands 4 and the seat 31 are temporarily tightened by the bolts 32 and the nuts 33.

In this state, the position of the pointer 4 with respect to the dial 3 is confirmed. That is, it is confirmed whether or not the pointer 4 points to the null position with respect to the dial. If there is a deviation, the pointer 4 is moved in the rotational direction by the amount of deviation. At this time, the seat 31 cannot rotate with respect to the pointer shaft 18, while the pointer 4 can rotate with respect to the pointer shaft 18, and the seat 31 is also temporarily tightened. Further, the rotation is adjusted by a deviation amount within a gap with respect to the pointer shaft 18. After the adjustment, the bolt 32 and the nut 33 are finally tightened.

  In addition, you may set the clearance gap between the axis | shaft of the volt | bolt 32, and the through-hole 4b suitably. For example, when the assumed amount of deviation of the pointer shaft 18 is in the range of −θ to θ centered on the null position, the length from the rotation center of the pointer shaft 18 to the center position of the through hole 4b is x. The gap may be about 2 × x tan θ. In this case, for example, if θ = 4 ° and x = 3 cm, the gap is about 4 mm.

Whether or not the hole is a clearance hole can be determined from various viewpoints. For example, whether it is larger than the dimensional accuracy error of the bolt 32 or the through-hole 4b, whether it is larger than the size of a general through-hole with respect to the shaft diameter of the bolt, or whether the gap is large enough to adjust the pointer. It can be determined by such as. For example, since the dimensional accuracy error of the bolt is generally 0.05 mm or less, it can be determined that it is not a clearance hole if the gap is 0.05 mm or less. Further, for example, if it is assumed that the length x from the rotation center of the pointer shaft 18 to the center position of the through hole 4b is 3 cm, if there is a gap of about 0.6 mm, approximately -0.6 ° to 0. Since the shift of 6 ° (0.6 ° is 1/10 of the interval of the minute scale) can be adjusted (2 × 3 cm × tan (0.6 °) = 0.6 mm), it can be said that it is a clearance hole. If one of the through hole of the seat and the through hole of the pointer is larger than the other, it can be specified that the one is a clearance hole. If the through hole is a long hole in the rotation direction, it can be identified as a clearance hole.

  According to the first embodiment described above, the pointer 4 is fixed to the seat 31 that cannot rotate with respect to the pointer shaft 18 by the bolt 32 and the nut 33, and the through hole 4b of the pointer 4 is used as a clearance hole. Therefore, the amount of deviation can be reduced by adjusting the position of the pointer 4 with respect to the dial 3. Conventionally, when a deviation between the pointer and the dial occurs, the drive unit to which the pointer is attached is rotated with respect to the dial, and in this method, the minute hand and the hour hand rotate at the same time. Although only accuracy could be improved, according to the first embodiment, there is an effect that the minute hand and the hour hand can be adjusted separately. Furthermore, since the pointer 4 and the seat 31 are fixed by the bolt 32 and the nut 33, if the needle 4 is removed from the pointer shaft 18 when it is removed from the pointer shaft 18, the pointer is adjusted again when reassembled. There is no need.

  Since the needle 4 and the seat 31 are stacked while the seat 31 is housed in the concave portion 4c of the needle 4, it is not necessary to make the needle shaft longer than the conventional product in order to attach the seat to the needle shaft. Since the position of the pointer 4 from the dial plate 3 (see FIGS. 1 and 2) or the like is not higher than that of the conventional product, it is not necessary to make a large design change to the conventional product. In addition, the attachment of the pointer 4 and the seat 31 can be facilitated.

In the first embodiment, the through hole 4b is a clearance hole, but the through hole 31b may be a clearance hole, or both the through holes 4b and 31b may be clearance holes.

Second Embodiment The overall configuration of the timepiece device according to the second embodiment is the same as that of the first embodiment shown in FIGS. In the following description, components similar to those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and description thereof is omitted.

  The cross-sectional view of the pointer mounting structure in the timepiece device of the second embodiment is also the same as that shown in FIG. That is, the seat and the pointer are inserted into the pointer shaft, the seat and the pointer are fixed by the bolt and the nut, and the retaining member 34 prevents the pointer and the seat from coming off. The configurations of the pointer shaft and the retaining member are the same as those in the first embodiment.

  However, in the first embodiment, when the pointer 4 is attached, the pointer 4 is rotated and adjusted by an appropriate amount with respect to the seat 31, whereas in the second embodiment, the amount of deviation estimated in advance is set. The position is reduced, and the position at which the through holes of the seat and the pointer are provided is different from the first embodiment. Specifically, it is as follows.

5 (b) is a front view showing the guide 104 of the second embodiment, FIGS. 5 (a) is a front view showing a seat 131 of the second embodiment.

  The seat 131 includes a mounting hole 131a, through holes 131b, 131c, 131d, and 131e, and a marking portion 131f. The mounting hole 131a is the same as the mounting hole 31a of the seat 31 of the first embodiment, and has a point-symmetric shape with the rotation center o1 as a symmetric point. In addition, if it is point-symmetrical, it is clear that it is also line-symmetrical, and the attachment hole 131a is a line-symmetrical shape with respect to the symmetry axes L1 and L2 orthogonal to each other. The symmetry axes L1 and L2 are examples of one symmetry axis and another symmetry axis of the present invention, respectively. Since the pointer attachment portion 18a (see FIG. 4) and the attachment hole 131a have the same shape, in the following, the rotation center o1 is the rotation center of the pointer attachment portion 18a, and the symmetry axes L1 and L2 are the symmetry axes of the pointer attachment portion 18a. May be handled.

  The through holes 131b to 131e are provided on the same circumference around the rotation center o1, and have the same diameter. The through holes 131c to 131e are provided on the symmetry axes L1 and L2 of the mounting hole 131a, while the through hole 131b is provided at a position shifted from the symmetry axis L1 by a predetermined deviation amount ε1. The displacement amount ε1 of the through hole 131b from the symmetry axis L1 is set to ½ of the maximum displacement amount of the pointer 104 with respect to the dial plate 3 (maximum displacement amount to one side with respect to the null position), for example. For example, if the maximum shift amount is 4 ° (a shift amount is generated in the range of −4 ° to 4 ° with the return zero position as the center), it is set to 2 °. The through hole 131d is an example of a first seat side fixing hole of the present invention, the through hole 131b is an example of a second seat side fixing hole, and the through holes 131c and 131e are third seat side fixing holes. It is an example.

  The marking portion 131f indicates the position of the symmetry axis L1 on the through hole 131b side shifted from the symmetry axis L1. The marking part 131f is formed by cutting out the edge part of the seat 131, for example. The marking portion 131f may be marked with, for example, ink or laser light.

  The pointer 104 has a mounting hole 104a and through holes 104b, 104c, 104d, and 104e. The mounting hole 104a is the same as the mounting hole 104a of the pointer 4 of the first embodiment.

The through holes 104b to 104e are provided on the same circumference around the rotation center o1. The through holes 104b to 104e are provided on straight lines L3 and L4 that pass through the rotation center o1 and are orthogonal to each other. The straight lines L3 and L4 are, for example, straight lines extending in the longitudinal direction of the pointer 104 and the direction orthogonal to the longitudinal direction. The straight lines L3 and L4 are examples of the first straight line and the second straight line of the present invention, respectively. The through hole 104 b provided on the tip side of the pointer 104 has the same diameter as the through holes 131 b to 131 e of the seat 131. On the other hand, the through holes 104 c to 104 e are formed in a long hole shape that is long in the rotation direction of the pointer 104. The diameter of the long hole in the short axis direction is equal to the diameter of the through hole 104b. The diameter of the long hole in the major axis direction is set so that the long hole extends over a position shifted from the straight line L3 or L4 by one shift amount ε1 and a position shifted by the shift amount ε1 to the other side. Yes. That is, the length corresponding to 2 × ε1 is longer than the diameter of the through hole 104b. The through hole 104b is an example of a first pointer side fixing hole of the present invention, the through hole 104d is an example of a second pointer side fixing hole, and the through holes 104c and 104e are third pointer side fixing holes. It is an example.

6A to 6C show attachment patterns of the seat 131 and the pointer 104. FIG. The seat 131 is fixed with respect to the pointer 104 by rotating 180 ° with respect to the pointer 104 or turning it over according to the amount of displacement of the pointer shaft 18. In these drawings, as can be seen by focusing on the relative positions of the through hole 131b and the marking portion 131f, with reference to FIG. 6A, in FIG. 6B, the seat 131 is turned upside down on the straight line L6. In FIG. 6C, the seat 131 is turned upside down around the straight line L5. Note that the straight line L5 is a straight line passing through the rotation center and the null position, and the straight line L6 is a straight line passing through the rotation center and orthogonal to the straight line L5. In FIG. 6 (a) ~ FIG 6 (c), since that indicates the state in which the pointer 104 coincides with the zero-restoring position, with respect to the straight line L5 and L6, perpendicular to the longitudinal direction and longitudinal guidance The signs of the direction straight lines L3 and L4 are also given in parentheses.

  FIG. 7 is an enlarged view of the seat 131 of FIG. In FIG. 7, the pointer shaft 18 is shifted by ε1 in the delay direction with respect to the straight line L5 indicating the null position of the dial 3 (see FIG. 1). Therefore, when the seat 131 and the pointer 104 are attached to the pointer shaft 18, the seat 131 is arranged so that the pointer 104 is displaced in the advance direction by ε 1 with respect to the pointer shaft 18.

  In other words, the through-hole 131b provided by being shifted from the symmetry axis L1 (see FIG. 5) is positioned on the circular through-hole 104b side (the tip end side of the pointer 104) of the pointer 104 and indicates the position of the symmetry axis L1. The seat 131 is disposed so as to be positioned in the advancing direction with respect to the portion 131f, and the through hole 131b and the through hole 104b are aligned. As a result, the pointer 104 is positioned in the advance direction with respect to the pointer shaft 18, and the straight line L3 indicating the longitudinal direction of the pointer 104 coincides with the straight line L5 indicating the zero return position. At this time, the through holes 131c, 131d, and 131e of the seat 131 coincide with the end portions on the delay direction side of the through holes 104e, 104d, and 104c, respectively. Then, by inserting a bolt having a shaft diameter equivalent to the diameter of the circular through hole of the seat 131 into each through hole and screwing it into the nut, the pointer 104 is fixed in a state of being aligned with the zero return position.

  FIG. 7 shows a case where the amount of deviation of the pointer shaft 18 in the delay direction with respect to the null position is equal to the amount of displacement ε1 of the through hole 131b with respect to the symmetry axis L1, but in the direction of delay of the pointer shaft 18. If the displacement amount of the pointer is equal to or more than ½ of ε1, the displacement amount of the pointer 104 can be reduced by arranging the seat 131 with respect to the pointer 104 as shown in FIG.

  FIG. 8 is an enlarged view of the seat 131 of FIG. In FIG. 8, the pointer shaft 18 coincides with a straight line L5 indicating the null position of the dial 3 (see FIG. 1). Therefore, when the seat 131 and the pointer 104 are attached to the pointer shaft 18, the seat 131 is arranged so that the pointer 104 does not shift in the delay direction or the advance direction with respect to the pointer shaft 18, and the seat 131 and the pointer 104 are fixed. .

  That is, the seat 131 is arranged so that the through hole 131d provided on the symmetry axis L1 (see FIG. 5) is located on the circular through hole 104b side (the tip side of the pointer 104) of the pointer 104, and the through hole 131b. And the through hole 104b are aligned. Thereby, the pointer 104 coincides with the symmetry axis L1 of the pointer shaft 18. At this time, the through hole 131 b of the seat 131 coincides with the end of the through hole 104 d of the pointer 104. Further, the through holes 131c and 131e of the seat 131 are located at the centers of the through holes 104e and 104c, respectively. Then, by inserting a bolt having a shaft diameter equivalent to the diameter of the circular through-hole of the seat 131 into each through-hole and screwing it into the nut, the pointer 104 is fixed in a state of being aligned with the zero return position.

  8 illustrates the case where the seat 131 is arranged so that the through-hole 131b is positioned on the delay side with respect to the marking portion 131f. However, the seat 131 is turned over from the state of FIG. 8 with the straight line L5 as an axis. In addition, the seat 131 may be arranged so that the through hole 131b is located on the more advanced direction side than the marking portion 131f.

  FIG. 9 is an enlarged view of the seat 131 of FIG. In FIG. 9, the pointer shaft 18 is displaced in the advance direction by ε1 with respect to the straight line L5 indicating the null position of the dial 3 (see FIG. 1). Therefore, when the seat 131 and the pointer 104 are attached to the pointer shaft 18, the seat 131 is disposed so that the pointer 104 is shifted in the delay direction by ε1 with respect to the pointer shaft 18, and the seat 131 and the pointer 104 are fixed.

  In other words, the through-hole 131b provided by being shifted from the symmetry axis L1 (see FIG. 5) is positioned on the circular through-hole 104b side (the tip end side of the pointer 104) of the pointer 104 and indicates the position of the symmetry axis L1. The seat 131 is disposed so as to be positioned in the delay direction with respect to the portion 131f, and the through hole 131b and the through hole 104b are aligned. As a result, the pointer 104 is positioned in a direction behind the pointer shaft 18, and the straight line L3 indicating the longitudinal direction of the pointer 104 coincides with the straight line L5 indicating the zero return position. At this time, the through holes 131c, 131d, and 131e of the seat 131 coincide with the end portions on the advance direction side of the through holes 104c, 104d, and 104e, respectively. Then, by inserting a bolt having a shaft diameter equivalent to the diameter of the circular through-hole of the seat 131 into each through-hole and screwing it into the nut, the pointer 104 is fixed in a state of being aligned with the zero return position.

  Although FIG. 9 shows a case where the amount of deviation of the pointer shaft 18 in the advance direction with respect to the null position is equal to the amount of displacement ε1 of the through hole 131b with respect to the symmetry axis L1, the direction of advance of the pointer shaft 18 is shown. 9 is not less than ½ of ε1, by disposing the seat 131 with respect to the pointer 104 as shown in FIG.

  According to the second embodiment described above, the seat 131 is provided with the through hole 131d on the symmetry axis L1 and the through hole 131b at a position shifted from the symmetry axis L1 by ε1. Since the through-hole 104b is provided at a position that is on the same circumference as the through-hole 131b, the seat 131 is placed at the position of the seat 131 and the seat 131 is rotated 180 ° from the one placement position. The amount of displacement of the pointer 104 with respect to the dial plate 3 can be reduced by selecting from the arranged position or the reversed arranged position.

  Further, in the seat 131, through holes 131c and 131e are provided on a symmetry axis L2 orthogonal to the symmetry axis L1, and in the pointer 104, a through hole facing the through holes 131c and 131e is provided. The fixing with 104 can be performed more firmly.

  Further, since the through holes 104c, 104d, and 104e of the pointer 104 are made longer than the through hole of the seat 131 by a length corresponding to 2 × ε, the through hole of the seat 131 may be formed depending on the position of the seat 131. The seat 131 and the pointer 104 can be positioned by matching with the end of the through hole of the long hole 104.

  Since the displacement amount ε1 of the through hole 131b from the symmetry axis L1 is ½ of the maximum displacement amount of the pointer shaft 18, it is confirmed that the displacement amount of the pointer 104 of the timepiece device 1 with respect to the dial plate 3 is ε1 or less. Can be guaranteed. Note that the maximum deviation amount can be obtained statistically by, for example, investigating deviation amounts in a plurality of timepiece devices of the same model. Alternatively, the deviation amount based on the backlash, the deviation amount based on the shaft forming accuracy, the deviation amount based on the gear forming accuracy, and the like can be calculated or statistically specified, and can be obtained by adding the respective deviation amounts.

  Since the marking portion indicating the position of the symmetry axis L1 is provided, it is easy to confirm the orientation of the seat 131.

Third Embodiment FIG. 10 shows a seat 231 and a pointer 204 of a timepiece device according to a third embodiment. The timepiece device of the third embodiment has the same configuration as that of the first and second embodiments, and the arrangement position of the seat 231 according to the amount of displacement of the pointer 204 with respect to the dial as in the second embodiment. Is to change.

  However, the mounting hole 231a into which the pointer shaft of the seat 231 is inserted is formed in a D shape. That is, the mounting hole 231a has a line-symmetric shape with respect to the symmetry axis L9, but is not a point-symmetric shape. In addition, the cross-sectional shape of the pointer attachment portion of the pointer shaft (not shown) is a D shape that fits into the attachment hole 231a. The seat 231 has a through hole 231b at a position shifted from the symmetry axis L9 by ε1.

  The pointer 204 has a mounting hole 204a through which the pointer shaft is inserted, and a through hole 204b that passes through the rotation center o2 and is arranged on a straight line that indicates the longitudinal direction of the pointer 204. The through hole 204b is provided at a position on the same circumference as the through hole 231b with the rotation center o2 as the center.

  The seat 231 is attached to the pointer shaft and the pointer 204 in either the state shown in FIG. 10A or the state shown in FIG. 10A inverted from the state shown in FIG. Thereby, the deviation | shift amount of the needle | hook 204 can be reduced similarly to FIG. 6 (a) and FIG.6 (c) of 2nd Embodiment.

  The present invention is not limited to the above embodiment, and may be implemented in various aspects.

  The cross-sectional shape of the pointer shaft is not limited to an oval shape or a D-shape. For example, in the first embodiment, it is sufficient that the rotation of the seat with respect to the pointer shaft is suppressed, and in the second and third embodiments, the rotation of the seat with respect to the pointer shaft is suppressed, and the seat can be turned over and attached. As long as the shape is point-symmetric or line-symmetric, it may be, for example, a rectangle or a hexagon. However, a shape having a circumferential surface that is in close contact with the attachment hole of the pointer, such as an oval shape or a D shape, is desirable so that the pointer is more securely fixed to the pointer shaft. If there are a plurality of symmetry axes such as a hexagon, the arrangement pattern with respect to the pointer axis of the seat increases.

  The mounting hole of the seat into which the pointer mounting portion of the pointer shaft is inserted may not be the same as the cross-sectional shape of the pointer mounting portion. It suffices if the rotation of the seat relative to the pointer shaft can be suppressed. For example, the attachment portion of the seat may be rectangular while the attachment portion of the pointer is oval. However, it is preferable that the mounting hole of the seat has the same shape as the pointer mounting portion so that the seat is more securely fixed to the pointer shaft.

  It is sufficient that at least one fixing hole (through hole) for the seat and the pointer is provided. The seat and the pointer are positioned in positions other than the rotation direction by inserting the pointer shaft into the mounting hole, and if the seat and the pointer are positioned at a position eccentric from the mounting hole, the seat and the pointer are positioned. is there. However, for example, as shown in FIG. 6B of the second embodiment, in order to be able to be used even in a state in which the seat is turned upside down with the straight line L6 as an axis (a state in which the seat is rotated by 180 °), at least 2 One fixing hole is required for the seat, and it is preferable that a plurality of fixing holes are provided in order to more securely fix the seat and the pointer.

  The fixing holes for the seat and the pointer are not limited to the through holes, and the fixing means are not limited to the bolts and nuts. The fixing means need only be inserted through the fixing hole and fixed in the rotational direction of the seat and the pointer. Note that the axial direction of the pointer shaft may be fixed by a retaining member, for example, as in the above-described embodiment, and need not be performed by a fixing means. However, if it is fixed by screw means such as a bolt and a nut, for example, as in the first embodiment, both the pointer and the seat can be removed from the pointer shaft and reassembled as they are. .

The front view which shows the external appearance of the timepiece apparatus of the 1st Embodiment of this invention. Sectional drawing which shows the internal structure of the timepiece device of FIG. FIG. 3 is a partially enlarged view of FIG. 2. The disassembled perspective view of the pointer attachment structure of the timepiece device of FIG. The figure which shows the pointer | guide and seat of the timepiece apparatus of the 2nd Embodiment of this invention. The figure which shows the attachment pattern of the pointer | guide and seat of FIG. FIG. 7 is a partially enlarged view of FIG. 6. FIG. 7 is a partially enlarged view of FIG. 6. FIG. 7 is a partially enlarged view of FIG. 6. The figure which shows the pointer | guide and seat of the timepiece apparatus of the 3rd Embodiment of this invention.

  DESCRIPTION OF SYMBOLS 18 ... Pointer shaft, 18a ... Pointer mounting part, 31 ... Seat, 31a ... Seat side mounting hole, 31b ... Seat side through hole, 4 ... Pointer, 4a ... Pointer side mounting hole, 4b ... Pointer side through hole, 32, 33 ... fixing means.

Claims (2)

A pointer shaft having a pointer mounting portion with a point-symmetrical non-circular cross section with the rotation center as a symmetric point;
A seat having a seat side mounting hole in a shape through which the pointer mounting portion is inserted and capable of suppressing rotation with respect to the pointer mounting portion, and a seat side fixing hole provided at a position eccentric from the seat side mounting hole;
The pointer side mounting hole in which the pointer mounting portion is inserted and the pointer mounting portion is rotatable, and the concave portion for fitting the seat is provided on the back side, and the seat side fixing hole of the seat is fitted. A pointer having a pointer side fixing hole provided at an opposing position;
A fixing means that is inserted through the seat side fixing hole and the pointer side fixing hole and fixes the pointer to the seat;
With
At least one of the seat side fixing hole and the pointer side fixing hole is a clearance hole having a gap with respect to the fixing means in the direction of pointer rotation, and the seat and the recess turn the seat upside down. And a timepiece pointer mounting structure having a shape that can be fitted into the recess. A pointer shaft having a pointer mounting portion with a point-symmetrical non-circular cross section with the rotation center as a symmetric point;
A seat side mounting hole having a shape through which the pointer mounting portion is inserted and capable of suppressing rotation with respect to the pointer mounting portion, and a first seat side provided at a position on one symmetrical axis of the cross section of the pointer mounting portion The fixed hole and the first seat side fixed hole are opposed to each other with the rotation center interposed therebetween, and are displaced by a predetermined amount from the one axis of symmetry, and the distance from the rotation center is the first seat side A seat provided at the same position as the fixing hole, and having a second seating side fixing hole having the same diameter as the first seating side fixing hole;
The pointer mounting portion is inserted and provided with a pointer side mounting hole in a shape that allows the pointer mounting portion to rotate, and a concave portion that fits the seat on the back surface, and the distance from the rotation center is the fitted seat The first pointer side fixing hole having the same diameter as the first seat side fixing hole is located at the same position as the first seat side fixing hole, and the same position as the second seat side fixing hole. In addition, an elongated hole-shaped second extending with the same diameter as the second seat-side fixing hole over a position shifted from the one axis of symmetry to the one side by the predetermined amount and a position shifted to the other side by the predetermined amount. A pointer having two pointer side fixing holes;
The pointer rotation direction of the pointer relative to the seat through the first seat side fixing hole and the first pointer side fixing hole, or the second seat side fixing hole and the second pointer side fixing hole. First fixing means for fixing the position of
With
The second pointer side fixing hole is a clearance hole having a gap with respect to the first fixing means in the direction of rotation of the pointer, and the seat and the recess are rotated by 180 degrees or even if the seat is turned over. A watch pointer mounting structure having a shape that can be fitted into the recess.

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