CH715985B1 - Timepiece comprising a plate such as a dial. - Google Patents

Abstract

The present invention relates to a timepiece comprising a plate (14), an installation part (18) which rotatably supports the display plate (14) around an axis in the direction of the thickness of the plate, a pin (42) which equips the installation part (18) so as to protrude and which is in the axial direction of the axis, an opening (44) which is made in the plate (14) , into which the pin (42) is inserted, and which includes a reduced-width portion (50) on a side which is rotated in one direction around the axis, and a rotation mechanism (40, 46 ) which rotates the plate (14) in the other direction around the axis to cause the clamping of the pin (42) in the reduced width portion.

Description

BACKGROUND OF THE INVENTION

Domain

The present invention relates to a timepiece having a plate.

PRIOR ART

[0002] In the patent application JP-A-2001-194470 (patent document 1) is disclosed a fixing structure of a display plate, in which a notch is made in an outer peripheral part of a plate display which constitutes an example of a plate of a timepiece, and the notch is in engagement with a cylindrical projection provided at the level of an auxiliary ring. In the timepiece disclosed in patent document 1, lateral displacement and rotation of the display plate are prevented by elastic deformation of the cylindrical projection to engage in the notch.

[0003] However, when fixing the display plate, it is necessary to push the cylindrical protrusion by elastic deformation of the cylindrical protrusion toward the notch of the display plate, and if the cylindrical protrusion is small , the elasticity is insufficient; therefore, it becomes difficult to push the cylindrical projection toward the notch, and the convenience of mounting the display plate deteriorates. On the other hand, if a length of the cylindrical projection is guaranteed to improve workability, a thickness of an entire timepiece increases and the appearance of the timepiece is impaired.

SUMMARY

[0004] In view of the foregoing, an object of the invention is to provide a timepiece capable of easily fixing a plate while maintaining precision in the positioning of the plate.

[0005] Claim 1 defines a timepiece according to the invention.

In the timepiece described in claim 1, when the plate is fixed to the installation part, the plate is fixed to a fixing part by inserting the pin into the opening of the plate. The rotation mechanism can rotate the plate so that the pin is gripped in the reduced width portion; in other words, the pin comes and is enclosed in the reduced width portion of the opening. The pin is enclosed in the reduced width portion so that the positioning and fixing of the plate in a direction of rotation is carried out. In addition, when the plate is fixed to the installation part, since it is not necessary to elastically deform the pin, the fixing of the plate becomes easy.

In the timepiece described in claim 2, the pin is a first pin and a second pin is a taper pin. Still in the timepiece described in claim 2, when the plate is fixed to the installation part after the insertion of the second pin in the opening of the plate, the wall of the plate slides along an inclined outer peripheral surface of the second pin, and therefore the plate rotates. Consequently, the first pin comes and is enclosed in the reduced width portion of the opening.

The invention described in claim 3 provides the timepiece according to claim 2, in which the second pin is detachable from the installation part.

In the timepiece described in claim 3, since the second pin is detachable from the installation part, the second pin can be changed and replaced easily.

In the timepiece described in claim 4, the pin is a first pin and a second pin is an eccentric pin. Still in the timepiece described in claim 4, after the plate is fixed to the installation part, the wall of the plate is compressed under the action of the rotation of the second pin. Consequently, the plate can be rotated, so that the first pin comes and is enclosed in the reduced width portion of the opening.

[0011] In the timepiece described in claim 5, in the state where the plate is fixed to the installation part so that the first pin is inserted into the opening, when the second pin, conical , of the member is engaged with the engagement hole of the installation part, the peripheral surface of the second pin on the other side in the circumferential direction comes to compress the wall of the plate, and the plate rotates, so so that the first pin comes and is enclosed in the reduced width portion of the opening.

In the timepiece described in claim 6, the inner edge of the other opening is compressed, so that the plate rotates.

[0013] In the timepiece described in claim 7, the edge extending in the secant direction with the circumferential direction is pressed, so that the plate rotates.

As described above, according to the timepiece of the invention, an excellent effect is provided, in which it is possible to suppress plate deformation while maintaining plate positioning accuracy.

BRIEF DESCRIPTION OF DRAWINGS

Figure 1 is a front view illustrating a timepiece according to a first embodiment of the invention. FIG. 2A is a sectional view along line 2-2 of the timepiece illustrated in FIG. 1 and FIG. 2B is a sectional view of a timepiece according to a variant. Figure 3 is an exploded perspective view illustrating a display plate and movement. FIG. 4A is a front view illustrating the display plate attached to the movement and FIG. 4B is a sectional view along line 4B-4B of the display plate illustrated in FIG. 4A. Figure 5 is an enlarged front view of part of the display plate. Fig. 6A is a front view illustrating a state where the tip of a straight pin is inserted into a pin insertion opening, and Fig. 6B is a sectional view along line 6B-6B of the pin plate. display and the right pin shown in Figure 6A. Fig. 7A is a front view illustrating a state where the tip of a taper pin is inserted into a hole, and Fig. 7B is a cross-sectional view along line 7B-7B of the display plate and the straight pin shown in Figure 7A. Fig. 8A is a front view illustrating a state where the display plate is pushed to a recess by inserting the taper pin into the hole, and Fig. 8B is a sectional view along line 8B-8B of the display plate. display and the right pin shown in Figure 8A. Fig. 9A is a front view illustrating a state where the right pin is clamped in the pin insertion opening, and Fig. 9B is a sectional view along line 9B-9B of the display plate and the right pin illustrated in Figure 9A. Figures 10A and 10B are sectional views illustrating a taper pin according to a second embodiment. FIG. 11A is a front view illustrating a display plate and a conical pin of a timepiece according to a third embodiment and a means for fixing the display plate, and FIG. 11B is a view side of the display plate and the taper pin shown in Figure 11A. Fig. 12A is a front view illustrating the display plate and the taper pin of the timepiece according to the third embodiment and a state where fixing of the display plate is performed, and Fig. 12B is a side view of display plate and taper pin shown in Figure 12A. Fig. 13A is a front view illustrating a display plate and an eccentric pin of a timepiece according to a fourth embodiment and a state before the display plate is fixed, and Fig. 13B is a side view of display plate and eccentric pin shown in Figure 13A. Fig. 14A is a front view illustrating the display plate and the eccentric pin of the timepiece according to the fourth embodiment and a state where the display plate is fixed, and Fig. 14B is a side view of the display plate and eccentric pin shown in Figure 14A. Fig. 15A is a front view illustrating a display plate and a movement of a timepiece according to a fifth embodiment and a state before the display plate is fixed, and Fig. 15B is a side view of the display plate and movement shown in Figure 15A. Fig. 16A is a front view illustrating the display plate, an element and the movement of a timepiece according to the fifth embodiment and a state where the display plate is attached, and Fig. 15B is a side view of the display plate, element and movement shown in Figure 16A.

DESCRIPTION OF EMBODIMENTS

First embodiment

A first embodiment of the invention will be described with reference to Figures 1 to 9. As illustrated in Figures 1 and 2A, a wristwatch 10 includes a case 12 forming an exterior.

A circular display plate 14, a movement 18 for controlling movement of a time indicator hand 16 (not shown in Fig. 1) indicating an hour, and the like are housed in the case 12. The movement 18 is housed inside case 12 with an intermediate frame 20. Display plate 14 is an example of a plate according to the invention, and movement 18 is an example of an installation part of the invention.

The movement 18 may be of a type in which the hour indicator hand 16 is driven by a driving force, from a motor, or may be of a type in which the indicator hand of hour 16 is driven by a driving force of a spring used as a power source.

As the material constituting the display plate 14, a metal, a synthetic resin, glass, ceramic, or the like can be used by way of example, and without the latter being particularly limited. ; conventionally known materials can be used. The display plate 14 can be provided with, for example, a solar panel to harvest energy for driving the motor, or can be equipped with a liquid crystal display plate, a transmitter plate electroluminescent light, or the like.

As shown in Figures 3 and 4, a pin 18A for fixing the hour indicator hand 16 shown in Figure 2 protrudes at a central portion of the surface of the movement 18. As shown in Figure 2A, the hour indicator hand 16 of the embodiment is formed to include an hour hand 16A, a minute hand 16B, and a second hand 16C. As shown in Fig. 4A, a pin insertion hole 14A into which the pin 18A is inserted is formed at the central portion, and time display indicators 22 are provided at a peripheral portion. in the display plate 14. The inner diameter of the rod insertion hole 14A is larger than the outer diameter of the rod 18A, so that the rod 18A is not in contact with the insertion hole of stem 14A.

As illustrated in Figures 2A and 3, a recess 24 having a circular shape in a plan view for inserting the display plate 14 is formed at the surface of the movement 18 on the side of the upper face of the timepiece. The inner diameter of recess 24 is slightly larger than the outer diameter of display plate 14 and movement of display plate 14 in a radial direction is limited within recess 24, but slight rotation is possible.

As shown in Fig. 2A, the case 12 is configured such that an annular glass rim 26 (a bezel) is sealingly installed at one surface in the thickness direction of a body 12A having an annular shape via a fixing joint 28 provided for this purpose. A circular glass 32 as a transparent cover is sealed at the inner periphery of the glass rim 26 via a filling fixing an annular glass 30. The display plate 14 and the hour indicator hand 16 can be seen through glass 32.

Further, a case bottom 34 is installed on a back surface of the body 12A in the thickness direction. The case back 34 of the embodiment is a so-called screw-down case back and an annular case back gasket 36 is disposed between the case 12 and the case back 34.

[0024] An annular projection 38 projecting inward in a radial direction is formed at a central portion in the thickness direction in the inner peripheral portion of the glass rim 26. The annular projection 38 covers the outer peripheral part of the display plate 14 from the side of the timepiece surface so that the display plate 14 does not detach from the recess 24 of the movement 18.

In addition, in Figure 2A, a spacing S (here having substantially the same dimension as the thickness of the display plate 14) is provided between the rear surface of the display plate 14 and a lower part of the recess 24, but as shown in Fig. 2B, a gap may not be formed between the rear surface of the display plate 14 and the lower part of the recess 24. As shown in Fig. 2A, in the event that the space S is provided between the rear surface of the display plate 14 and the lower part of the recess 24, for example, it is preferable that a projection 24A supporting the display plate 14 from a rear surface is provided in the recess 24.

Display plate retaining mechanism

[0026] As described below, in the wristwatch 10 of the embodiment, the display plate 14 is supported so as not to vibrate or shake in the direction of rotation relative to the movement 18.

[0027] As shown in Figure 3, a taper pin 40 is attached on one side (substantially corresponding to the "6 o'clock" direction) and a straight pin 42 is attached on the other side (substantially corresponding to "12 hours“) in the radial direction on the lower surface of the recess 24 of the movement 18 with the rod 18A interposed between them. The taper pin 40 has a circular cross-section perpendicular to the axial direction and has a truncated cone shape in which the diameter gradually decreases towards the tip. On the other hand, the straight pin 42 has a circular cross-section perpendicular to the axial direction and has a constant diameter throughout its length.

As illustrated in Figures 4 and 5, a central axis 40C of the taper pin 40, a central axis 18C of the rod 18A and a central axis 42C of the straight pin 42 are arranged (arranged on an imaginary line FL of figure 4) so as to be aligned on a straight line according to a plan view of the movement 18.

[0029] An opening 44 into which the straight pin 42 is inserted is formed on one side (substantially in the "12 o'clock" direction) and a round hole 46 into which the taper pin 40 is inserted is formed on the other side (substantially in the "6 o'clock" direction) in the radial direction of the display plate 14, with the rod insertion hole 14A being interposed therebetween. Additionally, taper pin 40 and round hole 46 are examples of a rotation mechanism according to the invention.

As shown in Figure 5, the opening 44 has a tapered shape whose width dimension gradually decreases in the counterclockwise direction (arrow in the CCW direction), and has an outer inclined surface 48A positioned outside the display plate 14 in the radial direction, an inner inclined surface 48B positioned inside the display plate 14 in the radial direction, a small circular arc portion 48C positioned in the counter-clockwise (arrow in CCW direction) of display plate 14, and a large circular arc portion 48D positioned clockwise (arrow in CW direction) of plate display 14. In addition, a portion of reduced width 50 is constituted, according to the embodiment, by the external inclined surface 48A and the internal inclined surface 48B.

In this embodiment, the radius of curvature r2 of the small circular arc portion 48C is smaller than the radius of curvature r1 (half the outer diameter) of the straight pin 42, and the radius of curvature of the large circular arc portion 48D is larger than the radius of curvature r1 of the straight pin 42. Further, the dimension of the spacing W1 between the outer sloping surface 48A and the inner sloping surface 48B counterclockwise d 'a watch (arrow in the direction CCW) is smaller than the diameter dimension of the straight pin 42 and the dimension of the spacing W2 between the outer inclined surface 48A and the inner inclined surface 48B in the clockwise direction. a watch (arrow in CW direction) is larger than the dimension of the diameter of the right pin 42.

[0032] The opening 44 has a size such that the outer peripheral surface of the straight pin 42 does not come into contact with the inner edge (the outer inclined surface 48A, the inner inclined surface 48B, the small arc portion circular 48C, and the large circular arc portion 48D) of the opening 44 upon insertion of the straight pin 42. Further, the opening 44 has a size to be adjusted such that the outer peripheral surface of the straight pin 42 comes into contact with an intermediate portion of the outer inclined surface 48A in the longitudinal direction and an intermediate portion of the inner inclined surface 48B in the longitudinal direction, and does not come into contact with the small circular arc portion 48C when the right pin 42 is rotated counterclockwise (arrow in CCW direction) in a state where the right pin 42 is inserted.

Method of fixing the display plate

[0033] Hereinafter, a method for fixing the display plate 14 to the movement 18 will be described. (1) First, after the display plate 14 is disposed in an approximate position above the movement 18, the display plate 14 is tilted so that the side of the opening 44 is slightly lowered, and as shown in Figure 6, the tip of the straight pin 42 is inserted into the opening 44 of the display plate 14. (2) Then the round hole 46 side of the display plate 14 is lowered and, as shown in Fig. 7, the tip of the taper pin 40 is inserted into the round hole 46. Since a center axis 46C of the round hole 46 and the center axis 40C of the taper pin 40 are moved in the circumferential direction, an inner end of the round hole 46 comes into contact with an inclined surface of the taper pin 40 in the clockwise direction (from the CW direction side). (3) Then, when the display plate 14 is pushed further towards the recess 24 of the movement 18, as shown in Fig. 8, the inner end of the round hole 46 causes the inclined surface of the taper pin 40 slides down and the display plate 14 rotates clockwise (arrow in CW direction). (4) As display plate 14 rotates clockwise (arrow in CW direction), as shown in Fig. 9, aperture 44 moves relatively clockwise. of a watch, with respect to the right pin 42, the right pin 42 comes and is enclosed in the reduced width portion 50, and the positioning and fixing of the display plate 14 in the direction of rotation is carried out. (5) Next, the movement 18 to which the display plate 14 is fixed is positioned in a predetermined position inside the case 12, and the glass rim 26 is fixed to the case 12. Therefore, as illustrated in the Figure 2A, the display plate 14 is in a state where it is interposed between the annular projection 38 of the glass rim 26 and the recess 24 of the movement 18, and is supported so as not to vibrate or shake in the direction of the thickness of the wristwatch 10.

[0034] In the embodiment as described above, the display plate 14 can be fixed to the movement 18 in a correct orientation with a high degree of precision simply by the action of the thrust of the plate. display 14 towards the recess 24 of the movement 18. Consequently, this makes it possible to eliminate the fact that the hour hand 16A, the minute hand 16B, and the second hand 16C can be moved relative to the hour display indicator 22 of display plate 14.

[0035] In addition, since it is not necessary to elastically deform the taper pin 40 and the straight pin 42 when the display plate 14 is fixed to the movement 18, a large force does not act on the plate of display 14 from taper pin 40 and straight pin 42 and any deformation of display plate 14 is eliminated. Therefore, it is possible to form the display plate 14 thinly and it is also possible to reduce the thickness of the wristwatch 10.

Further, since taper pin 40 and straight pin 42 need only be long enough to contact the end of display plate 14, there is no need to lengthen the pin. conical 40 and the straight pin 42 so that the latter can be easily deformed elastically. In other words, for example, as shown in Figure 2B, the taper pin 40 and the straight pin 42 should have substantially the same length as the dimension of the thickness of the display plate 14, and the dimension of the thickness of wristwatch 10 is not increased by influences from taper pin 40 and straight pin 42.

[0037] In the presently described embodiment, taper pin 40 and round hole 46 are provided substantially at "6 o'clock" on wristwatch 10, and straight pin 42 and aperture 44 are provided substantially at "6 o'clock". 12 o'clock" on the wristwatch 10, but the invention is not limited to this and the taper pin 40, the round hole 46, the straight pin 42, and the opening 44 can be arranged in a position hidden by the glass rim 26, and can be arranged in positions other than that illustrated in the embodiment.

Second embodiment

[0038] A wristwatch 10 according to a second embodiment of the invention will be described with reference to Figure 10. In addition, the same reference numerals are given to the same configurations as those of the first embodiment and their description will be omitted.

As shown in Fig. 10A, a hole 52 is formed in a movement 18 and a projection 54 capable of inserting into the hole 52 is formed at a base end of a taper pin 40 of the mode. of achievement.

[0040] The projection 54 is inserted into the hole 52, so that the taper pin 40 and the movement 18 are fixed. Additionally, as an example of a state of attachment, protrusion 54 is inserted and bonded to hole 52, so that taper pin 40 can be attached to movement 18. Since a plurality of taper pins 40 having different diameters can be used for one type of movement 18 by configuring them in this way, various types of display plates 14 can be attached to a single type of movement 18.

Additionally, as another example of a state of attachment, taper pin 40 may be interchanged or replaced with respect to movement 18 and, for example, an outer shape of protrusion 54 and an inner shape of hole 52 may be in an intermediate fit relationship or an interference fit (JIS B 0401 or the like), or the projection 54 and the hole 52 may have a thread and a female thread engaging each other, respectively.

[0042] In addition to the aforementioned effects, it is also possible to interchange the taper pin 40 with another taper pin 41 having a different diameter than that illustrated in Figure 10B by configuring it in this manner. Accordingly, this makes it possible to perform fine adjustment (adjustment of a range or amount of rotation of the display plate 14 in the circumferential direction) when attaching the display plate 14 and corresponding repair to the time of breakup.

Third embodiment

[0043] A wristwatch 10 according to a third embodiment of the invention will be described with reference to Figures 11 and 12. In addition, the same reference numerals are given to the same configurations as those of the first embodiment, and their description will be omitted.

As shown in Fig. 11, in a display plate 14 corresponding to this embodiment, a notch 56 having a substantially rectangular shape is formed at an outer peripheral portion in place of the round hole 46 ( see Figure 5) of the first embodiment. The notch 56 is provided with walls 56A and 56B extending in the radial direction of the display plate 14.

In this embodiment, as illustrated in Figure 6 of the first embodiment, when inserting the straight pin 42 so that the straight pin 42 does not come into contact with the reduced width portion 50 of the opening 44, as shown in Fig. 11, the position of the notch 56 and the position of the taper pin 40 are determined such that an inclined surface of the taper pin 40 on the tip side comes into contact with the wall 56A of the notch 56 in the direction of clockwise (direction CW).

Display plate fixing method

When the display plate 14 is pushed from a state shown in Fig. 11, as shown in Fig. 12, the wall 56A of the notch 56 urges the inclined surface of the taper pin 40 to slide toward the base. and the display plate 14 rotates clockwise (CW direction).

[0047] When display plate 14 rotates clockwise (CW direction), as described in the first embodiment, aperture 44 moves relative to the right pin. 42 in the clockwise direction, the straight pin 42 comes and is clamped in the reduced-width portion 50, and the positioning and fixing of the display plate 14 in the direction of rotation is performed.

As described above, in the wristwatch 10 of this embodiment also, similarly to the first embodiment, the display plate 14 is lowered, so that the positioning and fixing of the display plate 14 are made in the direction of rotation. Moreover, similar to the first embodiment, since it is not necessary to elastically deform the taper pin 40 and the straight pin 42, any deformation of the display plate 14 can be suppressed.

Fourth Embodiment

[0049] A wristwatch 10 according to a fourth embodiment of the invention will be described with reference to Figures 13 and 14. In addition, the embodiment is an example of a variant of the third embodiment and the same numbers references are given to the same configurations as those of the third embodiment, and their description will be omitted.

As illustrated in Figure 13, a round hole 58 is formed in the movement 18 and a first rod 62 of an eccentric pin 60 is rotatably inserted into the round hole 58. In the eccentric pin 60, a second rod 64 is integrally formed at one end of the first rod 62. A central axis 62C of the first rod 62 and a central axis 64C of the second rod 64 are moved in the radial direction. Additionally, a groove 66 into which a tip of a screwdriver is inserted is formed at a tip of the second rod 64.

In this embodiment, in the display plate 14, as shown in Figure 6 of the first embodiment, when inserting the straight pin 42 so that the straight pin 42 does not come into contact with the reduced width portion 50 of the opening 44, as illustrated in Figure 13, the second rod 64 is moved upstream relative to the first rod 62 in a counterclockwise direction (CCW direction) of the display plate 14, so that the second rod 64 of the eccentric pin 60 does not come into contact with the wall 56A of the notch 56 in the clockwise direction (direction CW).

[0052] In order to rotate the display plate 14 clockwise (CW direction), the tip of the screwdriver can be inserted into the groove 66 formed in the second rod 64 and the eccentric pin 60 can rotate, for example, clockwise (in the direction of arrow C in Fig. 14A). Consequently, the second rod 64 rotates while being in an eccentric state around the central axis 62C of the first rod 62, so that the distance between the wall 56A and the second rod 64 becomes relatively close, the wall 56A is compressed by a side surface of the second rod 64, and therefore the display plate 14 rotates clockwise (CW direction).

[0053] After the display plate 14 is inserted into a recess 24 of the movement 18, the eccentric pin 60 is rotated in one direction, and as illustrated in Figure 14, the wall 56A of the notch 56 is pushed by an outer peripheral surface of the second rod 64 clockwise (CW direction) to rotate the display plate 14 clockwise (CW direction).

[0054] When display plate 14 rotates clockwise (CW direction), as described in the first embodiment, aperture 44 moves relative to the right pin. 42 in the clockwise direction, the straight pin 42 comes and is clamped in the reduced-width portion 50, and the fixing of the display plate 14 in the direction of rotation is performed.

As described above, in the wristwatch 10 of the embodiment, positioning and fixing of the display plate 14 in the direction of rotation can be performed simply only by turning the eccentric pin 60 after the display plate 14 is inserted into the recess 24. In addition, since it is not necessary to elastically deform the eccentric pin 60, any deformation of the display plate 14 can be suppressed.

Furthermore, the range of rotation in which the second rod 64 is separated from the wall 56A during the rotation of the eccentric pin 60 constitutes a first range of rotation within the meaning of the invention, and the range of rotation in which the second rod 64 comes into contact with the wall 56A constitutes a second range of rotation within the meaning of the invention, and the display plate 14 can be driven in rotation by having the second range of rotation.

Fifth Embodiment

[0057] A wristwatch 10 according to a fifth embodiment of the invention will be described with reference to Figures 15 and 16. Furthermore, the same reference numerals are given to the same configurations as those of the embodiments described above. above, and their description will be omitted.

As shown in Figure 15, an engagement hole 68 having a conical hole shape is formed in movement 18, and as shown in Figure 6, upon insertion of straight pin 42 such that that the straight pin 42 does not come into contact with the reduced width portion 50 of the opening 44, as shown in Fig. 15, positions of the engagement hole 68 and the round hole 46 are determined, so that a center axis 68C of the engagement hole 68 of the movement 18 is moved relative to the center axis 46C of the round hole 46 of the display plate 14 clockwise (CW direction) .

[0059] A tip of a conical pin 72 of an element 70 installed on the surface of the display plate 14 can be inserted into the engagement hole 68 of the movement 18 via the round hole 46 of the plate. display 14. As element 70, for example, a window frame, time character, mark, or the like may be cited.

Display plate fixing method

As illustrated in Figure 16, when the taper pin 72 of the element 70 is pushed into the engagement hole 68 of the movement 18 from a state illustrated in Figure 15, as part of the process of pushing the taper pin 72, an outer peripheral inclined surface of the taper pin 72 clockwise (CW direction) slides over the round hole 46 of the display plate 14 to rotate the display plate 14 in clockwise (CW direction).

[0061] When the display plate 14 rotates clockwise (CW direction), as described in the first embodiment, the aperture 44 rotates relative to the straight pin 42 clockwise. clockwise, the straight pin 42 comes and is clamped in the reduced-width portion 50, and the positioning and fixing of the display plate 14 in the direction of rotation is performed.

[0062] As described above, in the wristwatch 10 of the embodiment, positioning and fixing of the display plate 14 in the direction of rotation can be simply carried out only by pushing the taper pin 72 out of the way. element 70 into the engagement hole 68 of the movement 18 after the display plate 14 is inserted into the recess 24. Moreover, since it is not necessary to elastically deform the taper pin 72 of the element 70, any deformation of the display plate 14 can be eliminated.

Other embodiments

Although the embodiments of the present invention have been described above, the present invention is not limited to the above, and it goes without saying that various modifications can be made without departing from the scope of the present invention. invention as defined in appended claim 1.

[0064] In the embodiments described above, as an example of the installation part, the movement 18 is cited, but the installation part can be other than the movement 18 as long as the plate of display 14 is fixed there.

Although the movement of the display plate 14 of the embodiments described above in the radial direction is limited by inserting the display plate 14 into the recess 24, the present invention is not limited to that, and for example, a round barrel passing through the rod 18A protrudes at the center of the movement 18, and the round barrel is inserted into the rod insertion hole 14A of the display plate 14 without any spacing, of such that the movement of the display plate 14 in the radial direction can be restricted. In such a configuration, it is not necessary to form the recess 24 in the movement 18.

In the embodiments described above, an example is given according to which the present invention is applied to the wristwatch. However, the present invention is not limited to the wristwatch, but can also be applied to a timepiece other than the wristwatch. Additionally, the timepiece may be a hand-held device or the like which is not called a timepiece, regardless of its shape, as long as it can display the time.

Claims (13)

1. Timepiece comprising: a plate (14); an installation part (18) which rotatably supports the plate (14) around an axis in the thickness direction of the plate (14); a pin (42) which equips the installation part (18) so as to protrude and which is in the axial direction of the shaft; an opening (44) which is in the plate (14), into which the pin (42) is inserted, and which includes a reduced width portion (50) having a reduced width on a side to which one turns in a direction around the axis; And a rotation mechanism (40, 46; 41, 46; 40, 56; 60, 56; 72, 46) which is able to rotate the plate (14) in the other direction around the axis to cause the clamping of the pin (42) in the reduced width portion (50). 2. Timepiece according to claim 1, wherein said pin (42) is a first pin and the rotation mechanism includes a second pin (40; 41; 72) which is tapered, which equips the installation part (18) so as to protrude, which is in the axial direction and which has a diameter decreasing towards the tip, and a wall (56A) which is provided in the plate (14) and with which, on the side towards which one goes in turning in the other direction around the axis, a peripheral surface of the second pin (40; 41; 72 ) comes into contact when the first pin (42) is inserted into the opening (44). 3. Timepiece according to claim 2, wherein the second pin (40; 41; 72) is detachable from the installation part (18). 4. Timepiece according to claim 1, wherein said pin (42) is a first pin and the rotation mechanism includes a second pin (60) which is an eccentric pin, which is rotatable in the installation part (18) and which is in the axial direction, and a wall (56A) which is provided in the plate (14) and with which an outer peripheral surface of the second pin (60) is able to come into contact, and a range of rotation of the second pin (60) including a first range of rotation spaced from the wall, and a second range of rotation in contact with the wall. 5. Timepiece according to claim 1, wherein said pin (42) is a first pin and the rotation mechanism includes a member (70) which is mounted on an upper surface of the plate (14) and comprises a second pin, this second pin being a taper pin (72) having a diameter decreasing towards the installation part (18), an engagement hole (68) which is provided in the installation part (18) and in which the second pin (72) engages, and a wall which is provided in the plate (14), and with which, on the side towards which one goes in turning in the other direction around the axis, a peripheral surface of the second pin (72) comes into contact when the first pin (42) is inserted into the opening (44) and the second pin (72) is inserted into the engagement hole (68). 6. Timepiece according to claim 2, wherein the wall is an inner edge of another opening (46) formed in the plate (14). 7. Timepiece according to claim 2, wherein the wall (56A) extends in a direction secant with the circumferential direction and is an edge of a notch (56) formed at the outer periphery of the plate (14). 8. Timepiece according to claim 3, wherein the wall is an inner edge of another opening (46) formed in the plate (14). 9. Timepiece according to claim 3, wherein the wall (56A) extends in a direction secant with the circumferential direction and is an edge of a notch (56) formed at the outer periphery of the plate (14). 10. Timepiece according to claim 4, wherein the wall is an inner edge of another opening formed in the plate (14). 11. Timepiece according to claim 4, wherein the wall (56A) extends in a direction secant with the circumferential direction and is an edge of a notch (56) formed at the outer periphery of the plate (14). 12. Timepiece according to claim 5, wherein the wall is an inner edge of another opening (46) formed in the plate (14). 13. Timepiece according to claim 5, wherein the wall (56A) extends in a direction secant with the circumferential direction and is an edge of a notch (56) formed at the outer periphery of the plate (14).