JP5811506B2 - Display device and electronic device - Google Patents

Description

  The present invention relates to a display device and an electronic device used for devices such as a clock, a calendar device, or a meter of a meter.

  For example, in a display device used in a wristwatch, as described in Patent Document 1, the rotation of a step motor is transmitted to an indicator wheel by an intermediate wheel, and the rotation of the pointer wheel is generated by another intermediate wheel. It is transmitted to the transmission wheel which is a car, the claw wheel is rotated with the rotation of this transmission wheel, the feed wheel is intermittently rotated by this claw wheel, the display vehicle is rotated by this feed wheel, and the display There has been known one configured to switch dates constituting a date display portion of a display vehicle with respect to a window portion.

JP 2009-198437 A

  However, in such a wristwatch display device, the claw wheel is rotated once in 24 hours by the transmission wheel, and the feed wheel is rotated by a predetermined angle each time the claw wheel is rotated, and the feed wheel is rotated at a predetermined angle. Is configured to rotate the display wheel by a predetermined angle to switch the date, so that the backlash generated by the gearing at the meshing part of the display car and the claw wheel and the meshing part of the claw wheel and the feed car Due to factors such as clearance between parts, there is a problem that the date of the display vehicle with respect to the display window is likely to be misaligned.

  A problem to be solved by the present invention is that a display device and an electronic device capable of preventing date misalignment in a display vehicle with respect to a display window portion and displaying the date on the display portion so as to be clearly and clearly visible. Is to provide equipment.

This invention includes a display wheel having a display portion in which a plurality of dates is kicked set, a drive mechanism for switching the date corresponding to the display window by rotating the display wheel, wherein the display wheel rotates date A display position correcting unit that corrects the position of the display vehicle so that each date corresponds to the display window when the date is switched, and the display position correcting unit is provided in the display vehicle, and A plurality of position correction recesses corresponding to each date of the display unit, and a plurality of position corrections provided on the display wheel and detachably engaged with the plurality of position correction recesses to correct the position of the display wheel A first guide surface that is inclined along the rotation direction of the display wheel is provided at each end portion of the plurality of position correction recesses positioned in the rotation direction of the display wheel. The plurality of position correcting protrusions The display is characterized in that a second guide surface that is inclined along the rotation direction of the display wheel and is guided by the first guide surface is provided at both ends positioned in the rotation direction of the display wheel. Device.

  According to the present invention, when the display wheel is rotated by the drive mechanism and any date on the display unit is made to correspond to the display window unit, even if the date on the display unit is slightly displaced with respect to the display window unit. The display position can be regulated by correcting the position of the display vehicle at a position where the date of the display section corresponds to the display window section by the display position correcting section. Thereby, the position shift of the date of the display vehicle with respect to the display window portion can be prevented, and the date on the display portion can be displayed with good visibility.

1 is an enlarged front view showing a first embodiment in which the present invention is applied to a pointer-type electronic wristwatch. FIG. FIG. 2 is an enlarged cross-sectional view of a main part showing a first drive system in the timepiece module of the electronic wristwatch shown in FIG. 1. FIG. 3 is an enlarged cross-sectional view of a main part showing a second drive system and a display device in the timepiece module of the electronic wristwatch shown in FIG. 1. FIG. 4 is an enlarged plan view of a main part showing the display device of the timepiece module shown in FIG. 3. 4 shows a display position correction unit in the display device shown in FIG. 4, (a) is an enlarged back view of a display vehicle provided with position correction projections of the display position correction unit, and (b) is the position of the display vehicle. It is the enlarged plan view which showed the principal part of the ground plate provided with the position correction recessed part which a correction protrusion part respond | corresponds. 4 shows a cross-section of the main part of the display device shown in FIG. 4, (a) is an enlarged cross-sectional view of the main part in the direction of arrows AA in FIG. 4, and (b) is the main part in the direction of arrows BB in FIG. It is an expanded sectional view of a part. 6 shows a cross-section of the main part in the operating state of the display device shown in FIG. 6, (a) is a main part showing a state in which the position correction projection part is detached from the position correction concave part as seen in the direction of arrows AA in FIG. 4. FIG. 5B is an enlarged cross-sectional view of an essential part showing a state in which the position correction protrusion is detached from the position correction recess in the direction of arrow BB in FIG. 4. 1 shows a display window of the electronic wristwatch shown in FIG. 1, (a) is a diagram showing a date display state at 0:00 when the date is changed, and (b) is at 23:59 immediately before the date is changed. The figure which showed the date display state at the time of a date shift, (c) is the figure which showed the date display state at the time of a date shift at 00:01 immediately after a date switch. In 2nd Embodiment which applied this invention to the pointer type | formula electronic wristwatch, it is an enlarged plan view of the principal part which showed the display apparatus. The leaf | plate spring member of the display apparatus shown by FIG. 9 is shown, (a) is the enlarged plan view, (b) is the enlarged side view. 9 shows a cross-section of the main part of the display device shown in FIG. 9, (a) is an enlarged cross-sectional view of the main part in the CC arrow of FIG. 9, and (b) is the main part in the DD arrow of FIG. 9. It is an expanded sectional view of a part. 11 shows a cross-section of the main part in the operating state of the display device shown in FIG. 11, (a) is a main part showing a state in which the position correction projection part is detached from the position correction concave part as seen from the CC arrow in FIG. 9. FIG. 10B is an enlarged cross-sectional view of an essential part showing a state in which the position correction protrusion is detached from the position correction recess in the direction of arrow DD in FIG. 9. The modification of the leaf | plate spring member in 2nd Embodiment shown by FIG. 9 is shown, (a) is the enlarged plan view, (b) is the enlarged side view. In 3rd Embodiment which applied this invention to the pointer type | formula electronic wristwatch, it is an enlarged plan view of the principal part which showed the display apparatus. FIG. 15 is an enlarged plan view showing a display wheel of the display device shown in FIG. 14. 14 shows a display pressing member of the display device shown in FIG. 14, in which (a) is an enlarged plan view and (b) is an enlarged side surface thereof. 14 shows a cross-section of the main part of the display device shown in FIG. 14, (a) is an enlarged cross-sectional view of the main part in the direction of arrows EE in FIG. 14, and (b) is the main part in the direction of arrows FF in FIG. 14. It is an expanded sectional view of a part. FIG. 17 shows a cross section of the main part in the operating state of the display device shown in FIG. 17, and (a) is a main part showing a state in which the position correction protrusion part is detached from the position correction concave part as seen in the direction of arrows EE in FIG. FIG. 14B is an enlarged cross-sectional view, FIG. 14B is an enlarged cross-sectional view of the main part showing a state in which the position correction protrusion is detached from the position correction recess in the direction of arrow FF in FIG. 14, and FIG. FIG. 5 is an enlarged side view showing a state in which both sides of the display pressing member are bent upward in a state where the part is detached. In 4th Embodiment which applied this invention to the pointer-type electronic wristwatch, it is the enlarged plan view of the principal part which showed the display apparatus. FIG. 20 is an enlarged plan view showing a display pressing member of the display device shown in FIG. 19. The leaf | plate spring member of the display apparatus shown by FIG. 19 is shown, (a) is the enlarged plan view, (b) is the enlarged side view. 19 shows a cross-section of the main part of the display device shown in FIG. 19, (a) is an enlarged cross-sectional view of the main part as viewed in the direction of arrows G-G in FIG. 19, and (b) is the main part in the direction of arrows H-H in FIG. It is an expanded sectional view of a part. 22 shows a cross-section of the main part in the operating state of the display device shown in FIG. 22, (a) is a main part showing a state in which the position correction projection part is detached from the position correction concave part as seen in the direction of arrows GG in FIG. 19. FIG. 20B is an enlarged cross-sectional view of an essential part showing a state in which the position correction protrusion is detached from the position correction recess in the direction of arrows HH in FIG. 19.

(First embodiment)
A first embodiment in which the present invention is applied to a pointer-type electronic wristwatch will be described below with reference to FIGS.
This electronic wristwatch includes a wristwatch case K as shown in FIG. A watch module M is accommodated in the watch case K. As shown in FIGS. 1 to 4, the timepiece module M includes a first drive system 5 that drives the second hand 1 and the minute hand 2, and a second drive system 6 that drives the hour hand 3 and the display wheel 4. .

  As shown in FIG. 2, the first drive system 5 includes a first step motor 7, a fifth wheel 8 that is rotated by the first step motor 7, and a second hand that is a fourth wheel that is rotated by the fifth wheel 8. A wheel 9, a third wheel 10 that is rotated by the second hand wheel 9, and a minute hand wheel 11 that is a second wheel that is rotated by the third wheel 10, and these are disposed between the main plate 12 and the train wheel bridge 13. It is configured to be arranged through the inner support 29.

  In this case, as shown in FIG. 2, the first step motor 7 includes a stator 7a having a coil portion and a rotor 7b that is rotatably disposed between the stator 7a, and is generated in the stator 7a by the coil portion. The rotor 7b is configured to perform step rotation by the magnetic field that is generated. The fifth wheel & pinion 8 is configured to mesh with the rotor kana 7c of the rotor 7b and rotate.

  As shown in FIG. 2, the second hand wheel 9 that is the fourth wheel is configured to mesh with the pinion 8 a of the fifth wheel 8 and rotate to move the second hand 1. The second hand wheel 9 includes a second hand shaft 9a. The second hand shaft 9a protrudes above the base plate 12, a presser plate 22 and a dial plate 25, which will be described later, and the second hand 1 is attached to the protruding upper end portion. The third wheel & pinion 10 is configured to mesh with the pinion 9b of the second hand wheel 9 and rotate.

  As shown in FIG. 2, the minute hand wheel 11 that is the second wheel is configured to mesh with the pinion 10 a of the third wheel 10 and rotate to move the minute hand 2. The minute hand wheel 11 includes a cylindrical minute hand shaft 11a. The second hand shaft 9a is rotatably inserted into the minute hand shaft 11a. The minute hand shaft 11a protrudes together with the second hand shaft 9a above the base plate 12, the presser plate 22, and the dial plate 25, and the minute hand 2 is attached to the protruding upper end portion.

  On the other hand, as shown in FIG. 3, the second drive system 6 includes a second step motor 14, first to third intermediate wheels 15 to 17 to which rotation of the second step motor 14 is sequentially transmitted, The hour hand wheel 18 that is an hour wheel that is rotated by the third intermediate wheel 17 and the rotation of the hour hand wheel 18 are transmitted by the transmission wheel 19, the feed wheel 20, and the date indicator driving wheel 23 to operate, thereby switching the date. And a display device 21.

  In this case, the second step motor 14 and the first to third intermediate wheels 15 to 17 of the second drive system 6 are interposed between the main plate 12 and the train wheel bridge 13 like the first drive system 5. 29. Further, the hour hand wheel 18, the transmission wheel 19, the feed wheel 20, the date indicator driving wheel 23, and the display device 21 in the second drive system 6 are disposed between the main plate 12 and the presser plate 22, as shown in FIG. Has been.

  As shown in FIG. 3, the second step motor 14 includes a stator 14a having a coil portion and a rotor 14b rotatably disposed between the stators 14a, and a magnetic field generated in the stator 14a by the coil portion. The rotor 14b is configured to rotate stepwise. The first intermediate wheel 15 is configured to mesh with the rotor kana 14c of the rotor 14b and rotate.

  As shown in FIG. 3, the second intermediate wheel 16 is configured to mesh with the pinion 15 a of the first intermediate wheel 15 and rotate. The third intermediate wheel 17 is configured to mesh with the pinion 16a of the second intermediate wheel 16 and rotate. As shown in FIG. 3, the hour hand wheel 18 that is an hour wheel is configured to mesh with the pinion 17 a of the third intermediate wheel 17 and rotate to move the hour hand 3.

  As shown in FIGS. 2 and 3, the hour hand wheel 18 includes a cylindrical hour hand shaft 18a. At this time, the hour hand wheel 18 is configured to be rotatably held by a presser plate 22 disposed on the main plate 12 with the minute hand shaft 11a being rotatably inserted into the hour hand shaft 18a. The hour hand shaft 18a protrudes above the presser plate 22 and the dial plate 25, and the hour hand 3 is attached to the protruding upper end portion. The hour hand 3 rotates once in 12 hours and displays the time for 12 hours, and is configured to rotate twice in one day (24 hours).

  In this case, a dial plate 25 is disposed on the upper surface of the presser plate 22 as shown in FIGS. The dial plate 25 is provided with a through hole 25b into which the needle shafts 9a, 11a, and 18a of the second hand 1, the minute hand 2, and the hour hand 3 are inserted from the lower side and project upward from the dial plate 25. Thereby, the second hand 1, the minute hand 2, and the hour hand 3 are attached to the upper ends of the needle shafts 9a, 11a, and 18a protruding above the dial plate 25 through the through holes 25b of the dial plate 25, and in this state, the respective hands. The upper part of the dial 25 is moved as the shafts 9a, 11a and 18a rotate.

  As shown in FIGS. 3 and 4, the display device 21 includes a transmission wheel 19 that meshes with the hour hand wheel 18 and rotates, a feed wheel 20 that meshes with the pinion 19a of the transmission wheel 19, and rotates. The date indicator driving wheel 23 rotated by 20 and the display wheel 4 rotated by a predetermined angle, that is, the angle at which the date is switched by the date indicator driving wheel 23, are arranged between the main plate 12 and the presser plate 22. It has become.

  In this case, the transmission wheel 19 and the feed wheel 20 are set to have a gear ratio so that the hour wheel 23 is slightly rotated when the hour hand wheel 18 rotates twice a day. Further, as shown in FIGS. 3 and 4, the date driving wheel 23 is configured such that the feed wheel 20 meshes with the pinion 23 a and rotates. The display wheel 4 is configured to rotate by a predetermined angle, that is, an angle at which the date is switched when the date driving wheel 23 is engaged with an inner tooth 4b described later.

  As shown in FIG. 4, the display wheel 4 is formed in a ring shape having a circular hole 4a at the center of the disk. Inner teeth 4 b with which the date indicator driving wheel 23 is engaged are provided on the inner peripheral portion of the circular hole 4 a of the display wheel 4. Further, as shown in FIG. 4, a date display unit 24 is provided on the upper surface of the display wheel 4. The date display unit 24 displays the dates 24 a from 1st to 31st in an annular manner at regular intervals. As shown in FIG. 3, the display wheel 4 is arranged on the main plate 12 in a rotatable state, and the upper surface on the inner peripheral side thereof is pressed by the holding plate 22 in a rotatable state.

  Accordingly, the display wheel 4 is configured to rotate by a predetermined angle by the rotation of the date driving wheel 23 meshed with the inner teeth 4b of the inner peripheral portion, and the date 24a of the date display portion 24 is switched. In this case, when the hour hand wheel 18 rotates twice a day, the date indicator driving wheel 23 slightly rotates when the hour hand wheel 18 rotates twice a day. The date 24a hardly moves and is configured not to change in appearance.

  Therefore, the second step motor 14 rotates at a high speed (40 seconds at 90 PPS) at the time when the date changes, for example, just before 0:00:00, that is, 23:59:00, and the hour hand wheel 18 Is rotated about 10 rotations at a high speed so that the display wheel 4 is rotated at a high speed and the date 24a of the date display unit 24 is quickly switched.

  In this case, as shown in FIG. 1 and FIG. 4, any one date on the date display unit 24 of the display wheel 4 is located at a position located on the 3 o'clock side of the dial 25 arranged on the upper part of the presser plate 22. A display window portion 25a corresponding to 24a is provided. Thereby, when the display wheel 4 is rotated by a predetermined angle by the rotation of the date indicator driving wheel 23, the date 24 a of the date display unit 24 moves by one day and corresponds to the display window unit 25 a of the dial 25. The date 24a is configured to be switched.

  On the other hand, as shown in FIGS. 3 and 4, the display device 21 corrects the position of the display wheel 4 at a position where any date 24 a of the date display portion 24 corresponds to the display window portion 25 a of the dial 25. The display position correction unit 26 is provided. As shown in FIG. 5 and FIG. 6, the display position correcting unit 26 has a plurality of position correcting recesses 27 provided on the upper surface of the main plate 12 facing the display wheel 4, and the plurality of position correcting recesses 27 face each other. And a plurality of position correcting protrusions 28 provided on the lower surface of the display wheel 4.

  As shown in FIG. 5B, the plurality of position correcting recesses 27 are provided on the main plate 12 in a state corresponding to each date 24 a of the date display unit 24 of the display wheel 4. As shown in FIGS. 6 (b) and 7 (b), the plurality of position correcting recesses 27 are gently inclined along the rotation direction of the display wheel 4 at both ends positioned in the rotation direction of the display wheel 4. A first guide surface 27a is formed. That is, each of the position correction recesses 27 is formed in a hemispherically depressed state, and is configured to guide the position correction protrusion 28 toward the center of the hemisphere.

  As shown in FIGS. 6 (a) and 6 (b), the plurality of position correction protrusions 28 are removably engaged with the plurality of position correction recesses 27 to correct the position of the display wheel 4 to be regulated. Is to do. As shown in FIGS. 6 (b) and 7 (b), the plurality of position correcting projections 28 are gently positioned along the rotation direction of the display wheel 4 at both ends positioned in the rotation direction of the display wheel 4. A second guide surface 28a that is inclined and guided by the first guide surface 27a is formed.

  That is, as shown in FIGS. 6 (a) and 6 (b), the position correction projection 28 is formed in a state of gently protruding into a hemisphere having substantially the same shape as the hemisphere of the position correction recess 27, respectively. The gently projecting hemispherical portion is configured to be guided toward the center by the hemispherical depression of the position correcting recess 27.

  In this case, as shown in FIGS. 4 and 5, the plurality of position correction recesses 27 are respectively provided at locations corresponding to all the dates 24 a in the date display unit 24 of the display unit 6. The plurality of position correction protrusions 28 are provided corresponding to all of the plurality of position correction recesses 27, but are not necessarily provided corresponding to all of the plurality of position correction recesses 27. It may be provided corresponding to any of the position correcting recesses 27.

  Thereby, as shown in FIGS. 6 and 7, the display position correcting unit 26 has a plurality of times when the display wheel 4 is rotated by a predetermined angle, that is, one date 24 a of the date display unit 24 by the date indicator driving wheel 23. The position correcting projections 28 are separated from the plurality of position correcting recesses 27 and moved on the upper surface of the main plate 12, and the moved position correcting projections 28 are respectively engaged with the plurality of position correcting recesses 27 positioned next. By doing so, the date 24a of the date display unit 24 of the display wheel 4 is configured to correspond to the display window unit 25a of the dial 25.

  That is, as shown in FIGS. 6 and 7, the display position correction unit 26 corrects the position when the position correction protrusion 28 that has moved on the upper surface of the main plate 12 engages with the position correction recess 27 positioned next. When the second guide surface 28a of the protrusion 28 moves along the first guide surface 27a of the position correction recess 27, the position correction recess 27 guides the position correction protrusion 28 and corrects the position of the display wheel 4. Thus, the date 24 a of the date display unit 24 is configured to accurately correspond to the display window unit 25 a of the dial 25.

  In this case, when the display wheel 4 is rotated by the date indicator driving wheel 23 and the plurality of position correction protrusions 28 are separated from the plurality of position correction recesses 27 and pushed up to the upper surface of the main plate 12, 7 (a), when the outer peripheral side of the display wheel 4 is elastically deformed so as to bend upward, and the plurality of position correction protrusions 28 are respectively engaged with the plurality of position correction recesses 27 positioned next. As shown in FIG. 6 (a), the outer peripheral side of the display wheel 4 is elastically restored so as to return to the original flat shape, and the position correction projection 28 is securely engaged with the position correction recess 27 by this elastic return force. It is configured to match.

Next, the operation of this electronic wristwatch will be described.
Normally, the first step motor 7 of the first drive system 5 rotates to rotate the second hand wheel 9 and the minute hand wheel 11 to move the second hand 1 and the minute hand 2, and the second step motor of the second drive system 6 14 rotates to rotate the hour hand wheel 18 to move the hour hand 3. Thereby, the second hand 1, the minute hand 2, and the hour hand 3 move the dial 25 to indicate the time.

  At this time, the display wheel 4 of the display device 21 hardly rotates. That is, when the hour hand wheel 18 rotates twice a day, the date indicator wheel 23 slightly rotates when the hour hand wheel 18 rotates twice a day. Therefore, even if the hour hand wheel 18 rotates for one day, the display wheel 4 almost rotates. The date 24a of the date display unit 24 hardly moves, so that it does not change in appearance.

  When the hour hand 3 moves and the date changes, for example, 23:59:00, the second step motor 14 rotates at a high speed (40 seconds at 90 PPS), and the hour hand wheel 18 rotates at a high speed of about 10 rotations. Accordingly, the display wheel 4 is rotated at a high speed by a predetermined angle, and the date 24a of the date display unit 24 is quickly switched.

  At this time, the date driving wheel 23 is rotated by the feed wheel 20 and the display wheel 4 meshed with the date driving wheel 23 is rotated by a predetermined angle. As a result, as shown in FIG. 4, the internal teeth 4 b provided on the inner peripheral portion of the display wheel 4 are rotated by a predetermined angle by the date indicator driving wheel 23, and the display wheel corresponding to the display window portion 25 a of the dial 25. The date 24a of the 4 date display unit 24 is quickly switched.

  Thus, when the display wheel 4 rotates, as shown in FIGS. 7A and 7B, a plurality of position correction protrusions of the display position correction unit 26 provided on the lower surface of the display wheel 4 are provided. The part 28 is detached from the plurality of position correcting recesses 27 provided on the upper surface of the main plate 12 of the timepiece module 2. At this time, the outer peripheral portion of the display wheel 4 is elastically deformed so as to bend upward. That is, when the position correction protrusion 28 is detached from the position correction recess 27, the second guide surface 28a of the position correction protrusion 28 is guided along the first guide surface 27a of the position correction recess 27. The correction projection 28 is smoothly detached from the position correction recess 27 and pushed up to the upper surface of the main plate 12.

  Then, the plurality of position correction protrusions 28 separated from the plurality of position correction recesses 27 and pushed up on the upper surface of the ground plate 12 move on the upper surface of the ground plate 12 with the rotation of the display wheel 4, The position correction projection 28 engages with the plurality of position correction recesses 27 positioned next. At this time, the outer peripheral side of the display wheel 4 is elastically restored so that it returns to the original flat shape, and the outer peripheral side of the display wheel 4 is pushed down by this elastic restoring force, so the second guide surface 28a of the position correcting projection 28 is obtained. Is guided along the first guide surface 27 a of the position correcting recess 27.

  As a result, the position correction projection 28 is guided by the position correction recess 27 to correct the position of the display wheel 4 while the next in the date display section 24 of the display wheel 4 as shown in FIG. The date 24a is accurately associated with the display window 25a of the dial 25. In this case, the gear ratio of the transmission wheel 19, the feed wheel 20, and the date indicator driving wheel 23 is decelerated so that the display wheel 4 hardly rotates when the hour hand wheel 18 rotates twice in one day. Along with this, a position shift of the date 24a of the date display unit 24 with respect to the display window unit 25a of the dial plate 25 can be considered due to backlash due to the accumulation of the front of each gear.

  For this reason, the date 24a of the date display section 24 is slightly (for example, -1...) With respect to the display window section 25a as shown in FIG. 8B, for example, at 23:59 immediately before the date is switched. It is conceivable that the position of the display wheel 4 is corrected by the engagement of the position correction protrusion 28 with the position correction recess 27, and therefore, as shown in FIG. This date 24a maintains a state that accurately corresponds to the center of the display window 25a.

  Further, the date 24a of the date display section 24 is slightly (for example, with respect to the display window section 25a as shown in FIG. 8C), for example, at 24:01 immediately after the date is switched. However, even at this time, the position of the display wheel 4 is corrected by the engagement of the position correcting protrusion 28 with the position correcting recess 27, and therefore, as shown in FIG. As described above, the date 24a of the date display unit 24 maintains a state that accurately corresponds to the center of the display window unit 25a.

  Thus, when the date 24a of the date display portion 24 of the display wheel 4 corresponding to the display window portion 25a of the dial 25 is switched, the meshing portion of the display wheel 4 and the date indicator driving wheel 23 and the date indicator driving wheel 23 are displayed. The date of the date display unit 24 of the display wheel 4 with respect to the display window portion 25a of the dial 25, even if there is a factor such as backlash caused by gearing at the meshing portion of the wheel 20 and the clearance between parts. 24a is not displaced, and the date 24a of the date display unit 24 accurately corresponds to the center of the display window 25a by the engagement of the position correction projection 28 with the position correction recess 27.

  Even when the wristwatch case K receives an impact from the outside in a state where the date 24a of the date display portion 24 corresponds to the center of the display window portion 25a of the dial 25 as described above, the position correction projection portion with respect to the position correction recess portion 27 is provided. 28, the date 24a of the date display unit 24 is not displaced with respect to the display window unit 25a, and the date 24a of the date display unit 24 corresponds to the center of the display window unit 25a accurately. maintain.

  As described above, according to the display device 21 of the electronic wristwatch, the display wheel 4 having the date display section 24 in which a plurality of dates 24a are annularly provided at predetermined intervals, and the dial 25 by rotating the display wheel 4. Either the second drive system 6 that is a drive mechanism that switches the date 24a of the date display unit 24 corresponding to the display window unit 25a, or the date display unit 24 when the display wheel 4 rotates and switches the date 24a. The position shift of the date display portion 24 of the display wheel 4 with respect to the display window portion 25a is provided by providing the display position correction portion 26 for correcting the position of the display wheel 4 so that the date 24a corresponds to the display window portion 25a. The date 24a of the date display unit 24 can be displayed so as to be clearly and clearly visible.

  That is, according to this display device 21, when the display wheel 4 is rotated by the second drive system 6 that is a drive mechanism, any date 24a of the date display unit 24 corresponds to the display window unit 25a of the dial 25. In addition, even if the date 24a of the date display unit 24 is slightly displaced from the display window unit 25a, the display position correction unit 26 displays the date 24a of the date display unit 24 at a position corresponding to the display window unit 25a. The position of the car 4 can be corrected.

  As a result, backlash caused by gearing at the meshing portion between the display wheel 4 and the date driving wheel 23 and the meshing portion between the date driving wheel 23 and the feed wheel 20, the clearance between parts, or the watch case K Even if there is a factor such as an impact from the outside, the date display portion 24 of the display wheel 4 can be prevented from being displaced with respect to the display window portion 25a of the dial 25, and the date 24a of the date display portion 24 can be clearly and clearly seen. Can be displayed.

  In this case, the display device 21 includes a base plate 12 that is a base member on which the display wheel 4 is rotatably arranged, and a presser plate 22 that elastically presses the display wheel 4 against the base plate 12. The display wheel 4 can be pressed and placed on the main plate 12 in a state where the display wheel 4 can be rotated by the presser plate 22, so that when the date wheel is changed by rotating the display wheel 4 by a predetermined angle, the display wheel 4 is made smooth. In addition, the position of the display wheel 4 by the display position correction unit 26 can be corrected well.

  In the display device 21, the display position correction unit 26 is provided on the base plate 12 as a base member, and a plurality of position correction recesses 27 respectively corresponding to the dates 24 a of the date display unit 24 of the display wheel 4. Since there are provided with a plurality of position correction projections 28 provided on the opposing display wheel 4 for releasably engaging with the plurality of position correction recesses 27 to correct the rotational position of the display wheel 4. When the date is changed by rotating the car 4 by a predetermined angle, the position of the display wheel 4 can be corrected to a precise position and the position can be regulated.

  Thereby, the date 24a of the date display part 24 of the display wheel 4 can be made to correspond to the display window part 25a accurately and satisfactorily, and a plurality of position correction recesses 27 are provided in the main plate 12, and a plurality of position correction protrusions are provided. 28 is provided in the display wheel 4, the installation space for the display position correction unit 26 can be saved, and thus the display position correction unit 26 can be installed compactly. Compactness can be achieved.

  In this case, first guide surfaces 27a that are gently inclined along the rotation direction of the display wheel 4 are provided at both ends of the position correction recesses 27 positioned in the rotation direction of the display wheel 4, respectively. The second guide surfaces 28a, which are gently inclined along the rotation direction of the display wheel 4 and are guided by the first guide surfaces 27a, at both ends of the position correction projection 28 positioned in the rotation direction of the display wheel 4. By being provided respectively, the display wheel 4 can be smoothly rotated to correct the position to an accurate position and be regulated.

  That is, when the display wheel 4 rotates and the plurality of position correction protrusions 28 are separated from the plurality of position correction protrusions 27, the position correction protrusions 28 are smoothly moved by the first and second guide surfaces 27a and 28a. And can be detached from the position correcting recess 27. When the plurality of position correction projections 28 are respectively engaged with the next plurality of position correction recesses 27, the second guide surface 28 a of the position correction projection 28 is the first guide surface of the position correction recess 27. 27a, the position correction projection 28 can be well guided by the position correction recess 27, and thus the position of the display wheel 4 can be corrected to the correct position and the position can be regulated. The date 24a of the display unit 24 can be accurately associated with the display window unit 25a of the dial plate 25.

  Further, in the display device 21, a plurality of position correction recesses 27 are provided at locations corresponding to all dates 24 a of the date display unit 24 of the display unit 4, and a plurality of position correction protrusions 28 are provided at a plurality of positions. By being provided corresponding to all of the correction recesses 27, the position of the display wheel 4 can be reliably and satisfactorily corrected and regulated in position. In this case, the plurality of position correction protrusions 28 need not be provided corresponding to all of the position correction recesses 27, and may be provided corresponding to any of the plurality of position correction recesses 27. Also in this case, the position of the display wheel 4 can be regulated by accurately and satisfactorily correcting the position of the display wheel 4.

(Second Embodiment)
Next, a second embodiment of the pointer-type electronic wrist watch to which the present invention is applied will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as 1st Embodiment shown by FIGS.
As shown in FIGS. 9 to 12, the display device 30 of the electronic wrist watch has a configuration in which a leaf spring member 31 is disposed on the upper side of the display wheel 4, and the other configuration is substantially the same as that of the first embodiment. Yes.

  As shown in FIGS. 11 and 12, the leaf spring member 31 is arranged on the upper surface of the display wheel 4 and is configured to elastically press the display wheel 4 onto the main plate 12. That is, as shown in FIGS. 9 and 10, the leaf spring member 31 has a ring shape that is substantially the same size as the display wheel 4, and has a substantially bowl shape in which constricted portions 31 a are provided on both sides of the outer periphery thereof. Is formed.

  Further, the leaf spring member 31 is configured to be disposed on the display wheel 4 in a state where the portion located on the outer peripheral side of the constricted portion 31 a corresponds to the display window portion 25 a of the dial 25. In this case, as shown in FIGS. 10 (a) and 10 (b), the leaf spring member 31 has the spring portions 32 facing downward on both sides thereof except for the opposing portions where the constricted portions 31a are respectively located. It is formed by being bent in a gently inclined state.

  As a result, as shown in FIG. 11A, the leaf spring member 31 has a portion located on the inner peripheral side thereof disposed between the display wheel 4 and the presser plate 22, and the display wheel 4 is moved in this state. It is elastically pressed onto the main plate 12. Further, as shown in FIG. 9, the leaf spring member 31 is provided with a mounting hole 31b at a location located in the vicinity of the constricted portion 31a and positioned in the circular hole 4a of the display wheel 4, and the mounting hole 31b A screw (not shown) to be inserted from above is screwed to the base plate 12 and attached to the base plate 12.

  Also in this case, the display device 30 corrects the position of the display wheel 4 at a position where any date 24a of the date display portion 24 corresponds to the display window portion 25a of the dial 25, as in the first embodiment. The display position correcting unit 26 is provided. As in the first embodiment, the display position correcting unit 26 includes a plurality of position correcting recesses 27 provided on the upper surface of the main plate 12 facing the display wheel 4 and the display wheels 4 facing the plurality of position correcting recesses 27. And a plurality of position correction protrusions 28 provided on the lower surface of the head.

  According to such a display device 30 for an electronic wristwatch, as in the first embodiment, the display wheel 4 is rotated by the second drive system 6 which is a drive mechanism, and any date 24a of the date display unit 24 is displayed on the dial. Even when the date 24a is slightly displaced with respect to the display window 25a when it is made to correspond to the 25 display windows 25a, the date 24a of the date display unit 24 corresponds to the display window 25a by the display position correction unit 26. Thus, the position of the display wheel 4 can be corrected. Thereby, the position shift of the date display unit 24 of the display wheel 4 with respect to the display window unit 25a can be prevented, and the date 24a of the date display unit 24 can be displayed so as to be clearly and clearly visible.

  In this case, the display device 30 includes a substantially ring-shaped leaf spring member 31 that elastically presses the display wheel 4 on the base plate 12 that is a base member on which the display wheel 4 is rotatably arranged. With the spring force of the leaf spring member 31, the display wheel 4 can be pressed and placed on the main plate 12 in a state where it can be rotated, thereby rotating the display wheel 4 by a predetermined angle as in the first embodiment. When the date is changed, the display wheel 4 can be smoothly rotated, and the position of the display wheel 4 by the display position correction unit 26 can be corrected well.

  That is, the leaf spring member 31 is formed by bending the spring portions 32 on both sides of the leaf spring member 31 so as to be gently inclined toward the lower side except for the opposing portions where the constricted portions 31a are respectively located. Since the portion located on the side is arranged between the display wheel 4 and the presser plate 22, the display wheel 4 can be elastically pressed onto the main plate 12 by the spring portion 32 that is gently inclined and bent. Thereby, the display wheel 4 can be smoothly and satisfactorily rotated, and the position of the display wheel 4 by the display position correcting unit 26 can be corrected well.

  Further, the leaf spring member 31 has a ring shape substantially the same size as the display wheel 4 and is formed in a substantially bowl shape in which a constricted portion 31a is provided on both sides of the outer periphery thereof, and the constricted portion 31a is a dial plate. Since it is arranged on the display wheel 4 in a state corresponding to the 25 display window portions 25a, even if the leaf spring member 31 is arranged on the display wheel 4, the constricted portion 31a of the leaf spring member 31 is arranged. The date 24a of the date display part 24 of the display wheel 4 can be visually recognized through the display window part 25a of the dial 25 located.

  Also in this case, the display position correcting unit 26 is provided on the base plate 12 as the base member, and a plurality of position correcting recesses 27 respectively corresponding to the date 24a of the date display unit 24 of the display wheel 4 and the display opposed thereto. The plate spring member 31 is provided with a plurality of position correction protrusions 28 provided on the vehicle 4 and detachably engaged with the plurality of position correction recesses 27 to correct the rotational position of the display wheel 4. The plurality of position correcting projections 28 can be reliably and satisfactorily engaged with the plurality of position correcting recesses 27 by the spring force of the display, and thus the date is changed when the display wheel 4 is rotated by a predetermined angle to change the date. The position of the vehicle 4 can be regulated by correcting the position to an accurate position.

  In the second embodiment described above, the leaf spring member 31 has a ring shape that is substantially the same size as the display wheel 4, and is formed in a substantially bowl shape in which constricted portions 31a are provided on both sides of the outer periphery thereof. Although the case has been described, the present invention is not limited thereto, and for example, the leaf spring member 35 may be formed as in the modification shown in FIG. That is, the leaf spring member 35 of this modified example has a ring shape that is substantially the same size as the display wheel 4, and is formed in a substantially heart shape in which a constricted portion 35a is provided at a part of the outer periphery thereof.

  The heart-shaped leaf spring member 35 is also configured to be disposed on the display wheel 4 with the constricted portion 35a corresponding to the display window portion 25a of the dial 25. In this case, the spring portions 36 are formed on the outer peripheral portions of the leaf spring member 35 located on both sides of the constricted portion 35a by being gently bent toward the lower side.

  Thereby, the part located in the inner peripheral part side of the leaf spring member 35 is disposed between the display wheel 4 and the presser plate 22, and in this state, the display wheel 4 is elastically pressed onto the main plate 12. It is configured. Further, the leaf spring member 35 is also provided with a mounting hole 35b at a location located in the vicinity of the constricted portion 35a and positioned in the circular hole 4a of the display wheel 4, and is inserted into the mounting hole 35b from above (see FIG. It is attached to the main plate 12 by not shown).

  Also in the modification of the display device 30 including such a leaf spring member 35, the leaf spring member 35 is formed by bending the spring portions 36 on both sides of the constricted portion 35a in a state where the spring portions 36 are gently inclined downward. Since the portion located on the inner peripheral side is arranged between the display wheel 4 and the presser plate 22, the display wheel 4 is placed on the main plate 12 by the spring portion 36 as in the second embodiment. Thus, the display wheel 4 can be smoothly and satisfactorily rotated, and the position of the display wheel 4 can be corrected satisfactorily.

  In this modified example, as in the second embodiment, even if the leaf spring member 35 is disposed on the display wheel 4, the display window portion 25a of the dial 25 located at the constricted portion 35a of the leaf spring member 35. The date 24a of the date display part 24 of the display wheel 4 can be visually recognized through the display.

(Third embodiment)
Next, a third embodiment of the pointer-type electronic wrist watch to which the present invention is applied will be described with reference to FIGS. Also in this case, the same parts as those in the first embodiment shown in FIGS.
As shown in FIG. 14, the display device 40 of the electronic wrist watch includes a display presser member 41 arranged on the outer peripheral portion of the display wheel 4, and displays the display presser member 41 and the display wheel 4 on a portion facing each other vertically. The position correction unit 42 is provided, and the other configuration is substantially the same as that of the first embodiment.

  That is, the display presser member 41 is formed in a ring shape corresponding to the outer peripheral portion of the date display portion 24 of the display wheel 4 as shown in FIGS. 14 and 16. A hook portion 41 a that is locked to the side surface of the main plate 12 is provided on the side portion of the display presser member 41 that is located at two locations of 12:00 and 6 o'clock. Further, on the lower surface of the display presser member 41 located at two locations at 3 o'clock and 9 o'clock, thick projections 41b for increasing the thickness of the portions are provided.

  Thereby, as shown in FIGS. 14 and 17, the display pressing member 41 locks the hook portion 41 a to the side surface of the main plate 12 in a state where the thick protrusion portion 41 b is disposed on the outer peripheral portion of the display wheel 4. Then, the display pressing member 41 is lifted with respect to the display wheel 4 by the thick protrusion 41b, and is disposed on the outer periphery of the display wheel 4, so that the thick protrusion 41b can rotate the display wheel 4. It is configured to hold down elastically in a stable state.

  14 to 16, the display position correction unit 42 includes a plurality of position correction protrusions 43 provided on the upper surface of the outer peripheral portion of the date display unit 24 of the display wheel 4 and the display pressing member 41. And a plurality of position correcting recesses 44 provided on the lower surface of the thick protrusion 41b. As shown in FIGS. 14 and 16 (a), the plurality of position correcting recesses 44 are provided on the display pressing member 41 so as to correspond to any of the plurality of dates 24a of the date display portion 24 of the display wheel 4. It is provided on the lower surface of the thick protrusion 41b located on the hour side and the 9 o'clock side, respectively.

  Further, as shown in FIG. 18B, first guides that are gently inclined along the rotation direction of the display wheel 4 at both ends of the plurality of position correction recesses 44 positioned in the rotation direction of the display wheel 4. A surface 44a is formed. That is, each of the position correction recesses 44 is formed in a state of being gradually depressed in a semicircular arc shape, and is configured to guide the position correction protrusion 28 toward the center portion of the semicircular arc shape.

  On the other hand, as shown in FIG. 15, the plurality of position correction projections 43 are for engaging and disengaging with the plurality of position correction recesses 44 to correct and restrict the position of the display wheel 4. As shown in FIG. 18B, the first guide is inclined gently along the rotation direction of the display wheel 4 at both ends of the plurality of position correction projections 43 positioned in the rotation direction of the display wheel 4. A second guide surface 43a guided by the surface 44a is formed.

  That is, as shown in FIGS. 18 (a) and 18 (b), the position correcting projection 43 is formed so as to gently protrude into a semicircular arc having the same shape as the semicircular arc of the position correcting recess 44. This gently projecting semi-arc-shaped portion is configured to be guided toward the center by the semi-arc-shaped depression of the position correcting recess 44.

  Thereby, as shown in FIG. 14, when the display wheel 4 is rotated by a predetermined angle, that is, one date 24a of the date display unit 24, the display position correcting unit 42 corrects a plurality of positions. The protrusion 43 is separated from the plurality of position correction recesses 44 and moves on the lower surface of the display pressing member 41, and the plurality of moved position correction protrusions 43 engage with the next plurality of position correction recesses 44, respectively. Thus, the date 24a of the date display unit 24 of the display wheel 4 is configured to correspond exactly to the display window unit 25a of the dial 25.

  That is, as shown in FIGS. 17 and 18, the display position correction unit 41 is engaged when the position correction protrusion 43 moved on the lower surface of the display pressing member 41 engages with the position correction recess 44 positioned next. When the second guide surface 43a of the position correction projection 43 moves along the first guide surface 44a of the position correction recess 44, the position correction recess 44 guides the position correction projection 43, and the position of the display wheel 4 is determined. The date 24a of the date display unit 24 is modified so that the position of the date 24a is accurately matched with the display window unit 25a of the dial plate 25 to be regulated.

  In this case, when the display wheel 4 is rotated by the date indicator driving wheel 23 and the plurality of position correction protrusions 43 are separated from the plurality of position correction recesses 44 and the lower surface of the display presser member 41 is pushed up. Further, as shown in FIG. 18C, the display pressing member 41 is configured to be elastically deformed so that both side portions of the 3 o'clock side and the 9 o'clock side are bent upward.

  In addition, when the plurality of position correction protrusions 43 are respectively engaged with the plurality of position correction recesses 44 positioned next, the display presser member 41 has the display presser member 41 as shown in FIG. It is configured to elastically return so that both side portions of the 3 o'clock side and the 9 o'clock side return to the original flat shape, and the position correction projection 43 is securely engaged with the position correction recess 44 by this elastic return force. ing.

  Also in the display device 40 of such an electronic wristwatch, as in the first embodiment, the display wheel 4 is rotated by the second drive system 6 which is a drive mechanism, and any date 24a of the date display unit 24 is displayed on the dial 25. Even when the date 24a is slightly displaced with respect to the display window 25a when the display window 25a is associated with the display window 25a, the display position correction unit 42 causes the date 24a of the date display 24 to correspond to the display window 25a. Thus, the position of the display wheel 4 can be corrected. Thereby, the position shift of the date display unit 24 of the display wheel 4 with respect to the display window unit 25a can be prevented, and the date 24a of the date display unit 24 can be displayed so as to be clearly and clearly visible.

  In this case, the display device 40 includes a substantially ring-shaped display pressing member 41 that is disposed on the outer peripheral portion of the date display portion 24 of the display wheel 4 and elastically presses the display wheel 4. The display wheel 4 can be pressed and placed on the main plate 12 in a state where the display wheel 4 can be rotated by the presser member 41, whereby the display wheel 4 can be smoothly moved when the display wheel 4 is rotated by a predetermined angle to change the date. In addition, the position of the display wheel 4 by the display position correction unit 42 can be corrected satisfactorily.

  That is, the display pressing member 41 is provided with hook portions 41a at the two sides at 12 o'clock and 6 o'clock and on the lower surface at two locations at 3 o'clock and 9 o'clock. By providing the thick protrusion 41b, when the hook 41a is locked to the side surface of the main plate 12 in a state where the thick protrusion 41b is disposed on the outer peripheral portion of the display wheel 4, the thickness is increased. The display pressing member 41 can be lifted with respect to the display wheel 4 by the protrusion 41b, whereby the thick protrusion 41b can elastically press the display wheel 4 in a rotatable state.

  Further, in the display device 40, the display position correction unit 42 is provided on the lower surface of the thick protrusion 41 b of the display pressing member 41 and corresponds to any of the plurality of dates 24 a of the date display unit 24 of the display wheel 4. A plurality of position correction recesses 44 and a plurality of position corrections for correcting the rotational position of the display wheel 4 by being detachably engaged with the plurality of position correction recesses 44 provided on the display wheel 4 opposed thereto. Since the projection 43 is provided, the plurality of position correction projections 43 can be elastically engaged with the plurality of position correction recesses 44 by the display pressing member 41, thereby rotating the display wheel 4 by a predetermined angle. Thus, when the date is changed, the position of the display wheel 4 can be regulated by correcting the position of the display wheel 4 to an accurate position.

  Also in this case, the first guide surfaces 44 a that are gently inclined along the rotation direction of the display wheel 4 are provided at both ends of the plurality of position correction recesses 44 positioned in the rotation direction of the display wheel 4. The second guide surfaces that are gently inclined along the rotation direction of the display wheel 4 and are guided by the first guide surface 44a at both ends of the plurality of position correction protrusions 43 positioned in the rotation direction of the display wheel 4. By providing 43a, similarly to the first embodiment, the display wheel 4 can be smoothly rotated, the position can be corrected to an accurate position, and the position can be regulated.

  That is, when the display wheel 4 rotates and the plurality of position correction protrusions 43 are detached from the plurality of position correction recesses 44, the position correction protrusions 43 are smoothly moved by the first and second guide surfaces 44a and 43a. And can be detached from the position correcting recess 44. Further, when the plurality of position correction protrusions 43 are respectively engaged with the next plurality of position correction recesses 44, the second guide surface 43a of the position correction protrusion 43 is the first guide surface of the position correction recess 44. 44a, the position correction projection 43 can be well guided by the position correction recess 44, whereby the position of the display wheel 4 can be corrected to the correct position and the position can be regulated. The date 24a of the display unit 24 can be accurately associated with the display window unit 25a of the dial plate 25.

(Fourth embodiment)
Next, a fourth embodiment of a pointer-type electronic wristwatch to which the present invention is applied will be described with reference to FIGS. In this case, the same parts as those in the third embodiment shown in FIGS.
As shown in FIGS. 22 and 23, in the display device 50 of the electronic wristwatch, a leaf spring member 51 is disposed between the display wheel 4 and the main plate 12, and a display pressing member 52 is provided on the outer peripheral portion of the display wheel 4. This is a configuration in which the display wheel 4 is pressed against the leaf spring member 51 by the display pressing member 52, and the other configuration is substantially the same as in the third embodiment.

  That is, as shown in FIGS. 22 and 23, the leaf spring member 51 is arranged between the display wheel 4 and the main plate 12 and is configured to push up the display wheel 4 elastically. As shown in FIGS. 21A and 21B, the leaf spring member 51 is formed in a ring shape having substantially the same size as the display wheel 4, and the spring portions 51a are obliquely formed on both sides of the outer peripheral portion. It is configured to be gently inclined and bent downward.

  The display pressing member 52 is formed in a ring shape corresponding to the outer peripheral portion of the date display portion 24 of the display wheel 4 as in the third embodiment. As shown in FIG. 20, hook portions 52 a that are locked to the side surfaces of the base plate 12 are respectively provided on the side portions of the display presser member 52 that are located at four locations at 12:00, 3 o'clock, 6 o'clock, and 9 o'clock. It protrudes to the side (in FIG. 20, the back side of the paper).

  Thereby, as shown in FIGS. 22 and 23, the display pressing member 52 is configured to press the display wheel 4 by the hook portion 52a without bending from the upper side. In this case, as shown in FIGS. 22 and 23, the display wheel 4 can be rotated by being elastically pushed up by the spring force of the leaf spring member 51 disposed on the lower side thereof. In this state, it is elastically pressed against the lower surface of the display pressing member 52.

  Also in the display device 50, as in the third embodiment, the display wheel 4 is positioned at a position where any date 24a of the date display portion 24 of the display wheel 4 corresponds to the display window portion 25a of the dial 25. A display position correction unit 42 for correction is provided. As shown in FIGS. 22 and 23, the display position correction unit 42 includes a plurality of position correction protrusions 43 provided on the upper surface of the outer periphery of the date display unit 24 of the display wheel 4, and the lower surface of the display pressing member 52. And a plurality of position correcting recesses 44 provided in the housing.

  In this case, as shown in FIGS. 20 and 22B, the plurality of position correcting recesses 44 are provided on the lower surface of the display pressing member 52 so as to correspond to all the dates 24 a of the date display unit 24. In addition, the plurality of position correction protrusions 43 are provided on the upper surface located on the outer peripheral side of the date display portion 24 of the display wheel 4 corresponding to all of the position correction recesses 44 as in the third embodiment. However, it is not necessarily provided corresponding to all of the plurality of position correcting recesses 44, and may be provided corresponding to any of the plurality of position correcting recesses 44.

  According to the display device 50 of such an electronic wristwatch, as in the third embodiment, the display wheel 4 is rotated by the second drive system 6 which is a drive mechanism, and any date 24a of the date display unit 24 is displayed on the dial. Even when the date 24a is slightly displaced with respect to the display window 25a when the display window 25a is made to correspond to the display window 25a, the display position correction unit 42 causes the date 24a of the date display 24 to correspond to the display window 25a. Thus, the position of the display wheel 4 can be corrected. Thereby, the position shift of the date display unit 24 of the display wheel 4 with respect to the display window unit 25a can be prevented, and the date 24a of the date display unit 24 can be displayed so as to be clearly and clearly visible.

  In this case, in the display device 50, the leaf spring member 51 is disposed between the display wheel 4 and the main plate 12 and elastically pushes up the display wheel 4, and is disposed on the outer peripheral portion of the date display unit 24 of the display wheel 4. Since the display pressing member 52 having a substantially ring shape for pressing the display wheel 4 from above is provided, the display wheel 4 is elastically pressed against the display pressing member 52 in a rotatable state by the spring force of the leaf spring member 51. Thus, when the date is changed by rotating the display wheel 4 by a predetermined angle, the display wheel 4 can be rotated smoothly and satisfactorily, and the position of the display wheel 4 by the display position correction unit 42 can be changed. Can be corrected well.

  Further, in the display device 50, the display position correcting unit 42 is provided on the lower surface of the display pressing member 52 and has a plurality of position correcting recesses 44 respectively corresponding to the date 24a of the date display unit 24 of the display wheel 4. Since it includes a plurality of position correction protrusions 43 provided on the opposing display wheel 4 and detachably engaged with the plurality of position correction recesses 44 to correct the rotational position of the display wheel 4, The plurality of position correction protrusions 43 can be elastically engaged with the plurality of position correction recesses 44 by the spring force of the leaf spring member 51, thereby rotating the display wheel 4 by a predetermined angle to change the date. The position of the display wheel 4 can be regulated by correcting the position of the display wheel 4 to an accurate position.

  Also in this case, the first guide surfaces 44 a that are gently inclined along the rotation direction of the display wheel 4 are provided at both ends of the plurality of position correction recesses 44 positioned in the rotation direction of the display wheel 4. The second guide surfaces that are gently inclined along the rotation direction of the display wheel 4 and are guided by the first guide surface 44a at both ends of the plurality of position correction protrusions 43 positioned in the rotation direction of the display wheel 4. By providing 43a, similarly to the third embodiment, the display wheel 4 can be smoothly rotated, the position can be corrected to an accurate position, and the position can be regulated.

  In each of the first to fourth embodiments and the modifications thereof described above, the plurality of position correction recesses 27 and 44 of the display position correction units 26 and 42 are formed to be recessed in a hemispherical shape or a semicircular arc shape. Although the case where the position correction protrusions 28 and 43 are formed to project in a hemispherical shape or a semicircular arc shape has been described, the present invention is not limited to this. It may be formed in a valley shape such as an inverted trapezoidal shape, and may be formed in a mountain shape such as an inverted V shape or a trapezoidal shape in which a plurality of position correcting projections protrudes with a gentle inclination.

  Further, in each of the first to fourth embodiments and the modifications thereof described above, the display position correction units 26 and 42 that correct the position of the display wheel 4 can be engaged with and disengaged from the plurality of position correction recesses 27 and 44. In the above description, the position of the display wheel 4 is adjusted by the magnetic force of the magnet. You may be comprised so that it may correct.

  In this case, magnets are provided on the display wheel 4 so as to correspond to the dates 24 a of the date display unit 24, and any of the base plate 12 and the display pressing members 41 and 52 facing the display wheel 4 is provided with the What is necessary is just to provide the magnet which adsorb | sucks with a magnet facing each other. Even with this configuration, the display wheel 4 can be used even if the date 24a of the date display unit 24 is slightly displaced with respect to the display window unit 25a of the dial 25, as in the first to fourth embodiments. Can be reliably and smoothly rotated to correct the position to an accurate position and to regulate the position.

  Further, in each of the first to fourth embodiments and the modifications thereof described above, the case where the display wheel 4 is provided with the date display unit 24 including a plurality of dates has been described, but the date display unit 24 is not necessarily required. For example, it may be a day of the week display unit that displays the day of the week from Monday to Sunday as a date, or may be a month display unit that displays the month from January to December as the date.

  Further, in each of the first to fourth embodiments and the modifications thereof described above, the case where the present invention is applied to a pointer-type electronic wristwatch has been described, but it is not necessarily an electronic wristwatch. For example, a travel watch, an alarm clock, a table clock It can be applied to various pointer-type watches such as wall clocks. Further, the present invention is not necessarily limited to a watch, and can be widely applied to various devices such as a calendar device and a meter of a meter.

As mentioned above, although several embodiment of this invention was described, this invention is not restricted to these, The invention described in the claim and its equal range are included.
The invention described in the claims of the present application will be appended below.

(Appendix)
The invention according to claim 1 includes a display wheel having a display unit in which a plurality of dates are annularly provided at predetermined intervals, and a drive mechanism that rotates the display wheel and switches the date corresponding to the display window unit; A display position correction unit that corrects the position of the display wheel so that each date corresponds to the display window when the display wheel rotates and switches the date. It is a display device.

  According to a second aspect of the present invention, in the display device according to the first aspect, a base member on which the display wheel is rotatably arranged, and a pressing member that elastically presses the display wheel against the base member. It is a display device characterized by comprising.

  According to a third aspect of the present invention, in the display device according to the first or second aspect, the display position correcting unit is provided on one of the display wheel and the base member, and each date of the display unit is provided. And a plurality of position correction recesses that are provided on the other of the display wheel and the base member and detachably engage with the position correction recesses to correct the position of the display wheel. A display device comprising a protrusion.

  According to a fourth aspect of the present invention, in the display device according to the first or second aspect, the display position correcting unit is provided on one of the display wheel and the pressing member, and each date of the display unit is provided. And a plurality of position correction recesses that are provided on the other of the display wheel and the pressing member and are detachably engaged with the position correction recesses to correct the position of the display wheel. A display device comprising a protrusion.

  According to a fifth aspect of the present invention, in the display device according to the third or fourth aspect of the present invention, the rotation direction of the display wheel is provided at both ends of the plurality of position correction recesses positioned in the rotation direction of the display wheel. The first guide surfaces that are inclined along the rotation direction of the display wheel are provided at both ends of the plurality of position correction protrusions that are positioned in the rotation direction of the display wheel. The display device is characterized in that a second guide surface guided by the first guide surface is provided.

  According to a sixth aspect of the present invention, in the display device according to any of the third to fifth aspects, one of the plurality of position correction recesses and the plurality of position correction protrusions is all of the date of the display unit. The other of the plurality of position correction recesses and the plurality of position correction protrusions is provided corresponding to at least one of the dates of the display unit. This is a characteristic display device.

  According to a seventh aspect of the present invention, there is provided an electronic apparatus comprising a device case that houses the display device according to the first aspect.

1 second hand 2 minute hand 3 hour hand 4 display wheel 5 first drive system 6 second drive system 12 ground plate 14 second step motor 18 hour hand wheel 19 transmission wheel 20 feed wheel 21, 30, 40, 50 display device 23 date turning wheel 24 date Display part 24a Date 25 Dial 25a Display window part 26, 42 Display position correction part 27, 44 Position correction concave part 27a, 44a First guide surface 28, 43 Position correction projection part 28a, 43a Second guide surface 31, 35, 51 Leaf spring member 41, 52 Display presser member

Claims (7)

And the display wheel having a display portion in which a plurality of date has been kicked set,
A drive mechanism for rotating the display wheel to switch the date corresponding to the display window,
A display position correction unit that corrects the position of the display vehicle so that each date corresponds to the display window when the display wheel rotates and switches the date ;
The display position correction unit is provided in the display wheel and is detachably associated with the position correction recesses corresponding to the dates of the display unit, and the display wheel is detachably engaged with the position correction recesses. And a plurality of position correction protrusions for correcting the position of the display vehicle,
First guide surfaces that are inclined along the rotation direction of the display wheel are provided at both ends of the plurality of position correction recesses that are positioned in the rotation direction of the display wheel, and the plurality of position correction protrusions. The second guide surfaces that are inclined along the rotation direction of the display wheel and are guided by the first guide surface are respectively provided at both ends of the display wheel that are positioned in the rotation direction of the display wheel. Display device. A display vehicle having a display unit provided with a plurality of dates;
A drive mechanism for rotating the display wheel to switch the date corresponding to the display window,
A display position correcting unit that corrects the position of the display vehicle such that each date corresponds to the display window when the display wheel rotates and switches the date;
With
The display position correction unit is provided in the display wheel and is detachably associated with the position correction recesses corresponding to the dates of the display unit, and the display wheel is detachably engaged with the position correction recesses. And a plurality of position correction protrusions for correcting the position of the display vehicle,
First guide surfaces that are inclined along the rotation direction of the display wheel are provided at both ends of the plurality of position correction recesses that are positioned in the rotation direction of the display wheel, and the plurality of position correction protrusions. The second guide surfaces that are inclined along the rotation direction of the display wheel and are guided by the first guide surface are respectively provided at both ends of the display wheel that are positioned in the rotation direction of the display wheel. Display device. A base member is pre-Symbol display wheel is disposed rotatably, display according to the display wheel in claim 1 or 2, characterized in that it comprises a resiliently pressed against the pressing member to the base member . The position correcting recess is provided on one of the display wheel and the base member,
The display device according to claim 3, wherein the position correction protrusion is provided on the other of the display wheel and the base member. The position correcting recess is provided on one of the display wheel and the pressing member,
The display device according to claim 3, wherein the position correction protrusion is provided on the other of the display wheel and the pressing member . One of the the previous SL plurality of position correction recess plurality of position correcting projections, each provided with said plurality of positions and the plurality of position correction recess at a location corresponding to all of the date of the display unit The display device according to claim 1 , wherein the other of the correction protrusions is provided corresponding to at least one of the dates of the display unit. An electronic apparatus comprising an apparatus case that houses the display device according to any one of claims 1 to 5 .

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