Timepiece

Abstract

The present application provides a timepiece capable of suppressing a decrease in appearance quality while maintaining magnetic resistance. The timepiece includes a cylindrical case, a back cover covering one opening of the case and having a transparent region, and a movement (10) housed in the case and having a coil assembly (24), a first magnetic resistance member (31) covering at least a portion of the coil assembly (24) on the back cover side, and a second magnetic resistance member (32) covering at least a portion of a side surface of the coil assembly (24). The first magnetic resistance member (31) has an overlapping region overlapping the second magnetic resistance member (32) when viewed from above in a direction perpendicular to the back cover. The first magnetic resistance member (31) and the second magnetic resistance member (32) are in contact with each other in the overlapping region.

Description

Technical Field

[0001] This invention relates to clocks and watches. Background Technology

[0002] Patent Document 1 discloses a clock with a structure in which a magnetic-resistant plate covers all or part of multiple motors, capable of shielding against external magnetic fields. The magnetic-resistant plate is integrally formed from a single plate-like component by punching a sheet material into a predetermined shape and then performing bending or other processes. This allows for the use of a large, seamless magnetic-resistant plate to cover the upper and sides of the motors.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2018-141639 Summary of the Invention

[0004] In the technology described in Patent Document 1, a plate-shaped component is bent to form a non-magnetic plate, which sometimes results in wrinkles and cracks in the processed parts. On the other hand, clocks with a transparent structure are known, in which the user can see the internal movement by using a back cover made of a transparent component such as glass, thereby improving the appearance. When the technology described in Patent Document 1 is applied to a clock with a transparent structure, the non-magnetic plate may be visible from the outside, and wrinkles and cracks may be obvious; in other words, there is a problem of reduced appearance quality.

[0005] The watch comprises: a cylindrical case; a back cover that covers an opening on one side of the case and has a transparent area; and a movement housed in the case, having watch components, a first non-magnetic component covering at least a portion of the watch components on the side of the back cover, and a second non-magnetic component covering at least a portion of the side of the watch components. When viewed from a top view perpendicular to the back cover, the first non-magnetic component has an overlapping area that overlaps with the second non-magnetic component, and the first non-magnetic component and the second non-magnetic component are disposed in contact in the overlapping area. Attached Figure Description

[0006] Figure 1 This is a top view showing the structure of the dial side of a clock.

[0007] Figure 2 This is a top view showing the structure of the back cover side of the clock.

[0008] Figure 3 This is a top view showing the dial side of the movement.

[0009] Figure 4 This is a top view showing the date wheel with the movement removed.

[0010] Figure 5 yes Figure 2 and Figure 7The movement shown is a cross-sectional view along the DD line.

[0011] Figure 6 This is a top view showing the back cover side of the movement.

[0012] Figure 7 It is a top view showing the movement with the gear train bridges removed.

[0013] Figure 8A This is a top view showing the structure of the first magnetically resistant component.

[0014] Figure 8B It is along Figure 8A The cross-sectional view of the first magnetically resistant component along line AA is shown.

[0015] Figure 8C It is along Figure 8A The cross-sectional view of the first magnetically resistant component along the BB line is shown.

[0016] Figure 9A This is a top view showing the structure of the second magnetically resistant component.

[0017] Figure 9B It is along Figure 9A A cross-sectional view of the second magnetically resistant component along the CC line.

[0018] Figure 10 It is shown in magnification Figure 7 A three-dimensional view of part E of the movement shown.

[0019] Figure 11 It is shown in magnification Figure 7 A three-dimensional view of part F of the movement shown.

[0020] Figure 12 It is a graph showing the relationship between the strength of the external magnetic field and the magnetic flux density flowing in the stator.

[0021] Figure 13A This is a cross-sectional view showing the fixing method of a modified example.

[0022] Figure 13B This is a cross-sectional view showing the fixing method of a modified example.

[0023] Figure 13C This is a cross-sectional view showing the fixing method of a modified example.

[0024] Label Explanation

[0025] 1: Clock; 2: Case; 3: Dial; 3A: Date window; 3B: Time markers; 4A: Hour hand; 4B: Minute hand; 4C: Second hand; 5: Power reserve scale; 6: Date wheel; 8: Glass cover; 9: Case back; 9A: Frame; 9B: Case back glass; 10: Movement; 11: Baseplate; 12: Crown; 13a: First fixing screw; 13b: Second fixing screw; 14: Clamping component; 15: Pendulum; 15A: Pendulum body; 15B: Opening; 15C: Weight; 21: Hour wheel; 22: Date changing wheel; 24: Coil assembly as a clock component; 24a: Coil; 24b: Stator; 25: Gear train bridge as a support component; 26: Barrel wheel; 27: Second bridge; 28: Generator; 30: Antimagnetic part on the dial side Components; 31: First magnetic-resistant component; 31a1: Stepped portion; 31a2: Side portion; 31a: First main body portion; 31b: Second main body portion; 31c: First contact portion; 31d: Second contact portion; 32: Second magnetic-resistant component; 32a1: Stepped portion; 32a2: Stepped portion; 32a: First main body portion; 32b1: Stepped portion; 32b2: Stepped portion; 32b: Second main body portion; 32c: First contact portion; 32d: Second contact portion; 32e: Fixing portion; 40: Rotor; 41: Rotor magnet; 42: Rotor wheel; 43: Rotor inertia plate; 50: Display wheel system; 53: Wheel No. 3; 54: Wheel No. 4; 55: Wheel No. 5; 56: Wheel No. 6; 57: Eccentric wheel; 58: Transmission wheel. Detailed Implementation

[0026] In the following figures, the three mutually orthogonal axes are referred to as the X-axis, Y-axis, and Z-axis. The direction along the X-axis is designated as the "X-direction," the direction along the Y-axis as the "Y-direction," and the direction along the Z-axis as the "Z-direction." The direction of the arrow is the "+" direction, and the direction opposite to the "+" direction is designated as the "-" direction. Additionally, the +Z direction is sometimes referred to as "up" or "above," and the -Z direction as "down" or "below." Views from the +Z and -Z directions are also referred to as top views or plane views. Furthermore, the surface on the +Z side is designated as the upper surface, and the surface on the -Z side (opposite to it) is designated as the lower surface.

[0027] First, refer to Figure 1 and Figure 2 The structure of clock 1 will be explained.

[0028] like Figure 1 As shown, watch 1 is a wristwatch worn on a user's wrist, having a cylindrical case 2, with a dial 3 arranged on the inner circumference of the case 2. The opening on the face side of the two openings of the case 2 is blocked by a glass cover 8, and the opening on the back side is blocked by a back cover 9. Furthermore, the case 2 and the back cover 9 may not be separate pieces, but rather a single piece formed as a single unit.

[0029] like Figure 2 As shown, the back cover 9 is composed of an annular frame 9A and a back cover glass 9B mounted on the frame 9A. The back cover glass 9B functions as a transmission area. The clock 1 of this embodiment is a frame-type clock with a transmission area that allows the pendulum 15 and the energy storage hand to be viewed from the back cover 9 side of the clock 1.

[0030] Clock 1 has: a movement 10 housed within the case 2 (see reference) Figure 2 The dial 3 includes an hour hand 4A, a minute hand 4B, and a second hand 4C for displaying time information, as well as a power reserve hand for indicating duration. A calendar window 3A is provided on the dial 3, through which the date wheel 6 is visible. Additionally, a time marker 3B is provided on the dial 3 for indicating the time. A fan-shaped power reserve scale 5 is provided on the back cover side of the gear train bridge 25 (described later). By indicating this power reserve scale 5 with the power reserve hand, the remaining winding amount of the mainspring can be displayed. Although not shown, the power reserve hand is mounted to rotate about the center of the fan-shaped power reserve scale 5.

[0031] A mounting bracket for the handle 12 is provided on the side of the housing 2 (see reference). Figure 3 The crown 7 is located in the movement 10. The crown 7 can be pulled out from the 0th position, which is pressed towards the center of the watch 1, and moved to the 1st and 2nd positions. When the crown 7 is rotated in the 0th position, the mainspring, which serves as a mechanical energy source, is wound in the movement 10. The energy storage hand moves in conjunction with the winding of the mainspring.

[0032] When the crown 7 is pulled to position 1 and rotated, the date wheel 6 moves to calibrate the date. When the crown 7 is pulled to position 2, the second hand 4C stops. When the crown 7 is rotated to position 2, the hour hand 4A and minute hand 4B move to calibrate the time.

[0033] like Figure 2 As shown, an opening 15B is formed in the hammer body 15A of the pendulum 15, thereby reducing the situation where the energy storage needle and energy storage scale 5, which display the remaining winding amount of the mainspring, cannot be visually seen due to the position of the pendulum 15.

[0034] Next, refer to Figures 3 to 5 The structure of the movement 10 as seen from the dial 3 side will be explained. Here, movement 10 refers to a structure assembled from the watch 1, excluding external components such as the case 2, dial 3, and hands 4A-4C, and including drive components such as the gear train for driving the hands 4A-4C. Furthermore, Figure 4 It shows from Figure 3 The movement 10 shown is in its state after the date wheel 6 has been removed. Figure 5 The movement 10 shown is configured with the side of the dial 3 (hereinafter referred to as the dial 3 side) facing downwards.

[0035] like Figure 3 and Figure 4 As shown, the movement 10 has an hour wheel 21 mounted on the base plate 11. An hour hand 4A is fixed on the hour wheel 21. A date-changing intermediate wheel is mounted on the hour wheel 21, and a date-changing claw that rotates the date wheel 6 is mounted on the date-changing wheel 22 that rotates through the date-changing intermediate wheel.

[0036] like Figure 4 As shown, when the date wheel 6 is removed from the movement 10, a ring-shaped antimagnetic component 30 on the dial side is arranged overlapping the date wheel 6. The dial-side antimagnetic component 30 is used to shield against magnetic fields from outside the watch 1. Furthermore, a coil assembly 24, which is a watch component, is arranged below and inside the ring-shaped dial-side antimagnetic component 30. As a result, the influence of magnetic fields from the dial 3 side on the coil assembly 24 can be suppressed.

[0037] The non-magnetic component 30 on the dial side is made of, for example, pure iron, permalloy, etc.

[0038] Next, refer to Figures 5 to 11 The structure of the movement 10 as seen from the side of the back cover 9 will be explained. Furthermore, Figure 7 It shows from Figure 6 The shown image shows the movement 10 after the gear train bridge 25, which serves as a support component, has been removed. As described above, Figure 5 The movement 10 shown is configured with the dial 3 side facing down, that is, with the back cover 9 side facing up.

[0039] like Figure 6 and Figure 7 As shown, the movement 10 viewed from the back cover 9 has a barrel wheel 26 for storing the mainspring. The hour hand 4A, minute hand 4B, and second hand 4C are respectively mounted on the hour wheel 21, minute wheel, and fourth wheel 54 of the movement 10, and are driven by the mainspring of the movement 10.

[0040] Movement 10 includes base plate 11 and second bridge plate 27 (see reference). Figure 5 The gear train clamp 25 holds the gear train in place. The base plate 11, the second clamp 27, and the gear train clamp 25 are flat, plate-shaped components with surfaces. For example... Figure 5 As shown, between the base plate 11 and the second clamping plate 27 and the gear train clamping plate 25 are arranged: a barrel for storing the mainspring; an energy storage and display mechanism; a manual winding mechanism and part of an automatic winding mechanism for winding the mainspring; a display gear train 50 that transmits the torque of the mainspring; and a generator 28 (see reference). Figure 5 The display gear train 50 is driven by torque transmitted via the display gear train 50; and a circuit board equipped with an IC (not shown) is driven by electricity from the generator 28 to control the rotation cycle of the display gear train 50.

[0041] like Figure 7As shown, the generator 28 is configured to include a rotor 40 and a coil assembly 24. The rotor 40 includes a rotor magnet 41, a rotor wheel 42, and a rotor inertia disc 43. Furthermore, as described later, torque from the mainspring is transmitted to the rotor 40 via a display gear train 50. The coil assembly 24 consists of a coil 24a and a stator 24b.

[0042] When the rotor 40 rotates due to the torque of the spring, the generator 28 can generate induced electricity through the coil assembly 24, output electrical energy and supply it to the IC, etc. In addition, by short-circuiting the coil 24a, braking can be applied to the rotor 40, and the braking force can be controlled by the IC, thereby making the rotation period of the rotor 40, that is, the rotation period of the display gear train 50, constant.

[0043] As described above, the clock 1 in this embodiment is configured as an electronically controlled mechanical clock. This electronically controlled mechanical clock uses the rotation of the rotor 40 of the generator 28, which generates induced electricity and outputs electrical energy, and is also used as a speed regulating mechanism.

[0044] The barrel stores the mainspring and includes a barrel wheel 26 and a barrel shaft. A large steel wheel 29, which rotates integrally with the barrel shaft, is mounted on the barrel shaft.

[0045] The automatic winding mechanism has the following features: Figure 5 The pendulum 15 shown; the bearing shown is omitted, which supports the axis of the pendulum 15 for free rotation and has a gear that rotates integrally with the pendulum 51. Figure 7 The eccentric wheel 57 shown meshes with the gear of the bearing; the pawl bar; and the drive wheel 58. When the pendulum 51 rotates, the large steel wheel 29, coaxially mounted on the barrel wheel 26, rotates via the eccentric wheel 57, the pawl bar, and the drive wheel 58, thereby winding the mainspring housed in the barrel wheel 26. Furthermore, in this embodiment, the description of the manual winding mechanism is omitted.

[0046] Next, the display gear train 50, which uses mechanical energy from the mainspring to drive the hour hand 4A, minute hand 4B, and second hand 4C, will be described. For example... Figure 7 As shown, the display wheel system 50 includes wheel 2, wheel 3, wheel 4, wheel 55, and wheel 6, and is mounted on the base plate 11. The rotation of the cartridge wheel 26 is transmitted to wheel 2, then sequentially increased in speed by wheel 3, wheel 4, wheel 55, and wheel 6, before being transmitted to the rotor 40. A minute hand 4B is fixed to wheel 2 via a minute wheel. A second hand 4C is fixed to wheel 4. Additionally, the hour wheel 21 is connected to the minute wheel via a cross wheel. An hour hand 4A is fixed to the hour wheel 21.

[0047] In addition, the eccentric wheel 57, ratchet bar, drive wheel 58, and display wheel system 50 in the bar box, automatic winding mechanism are sometimes collectively referred to as the wheel system.

[0048] like Figure 7 As shown, a first magnetically resistant component 31 is disposed on the inner side of the outer periphery of the base plate 11. That is, the first magnetically resistant component 31 is disposed in such a way that it covers at least a portion of the rear cover 9 side of the coil assembly 24.

[0049] Furthermore, the first magnetic-resistant component 31 is formed in a ring shape when viewed from the rear cover 9 side. When viewed from above, at least a portion of the gear train is disposed inside the first magnetic-resistant component 31. Specifically, at least a fourth wheel 54, an eccentric wheel 57, and a transmission wheel 58 are disposed inside the first magnetic-resistant component 31. In other words, the ring-shaped first magnetic-resistant component 31 is disposed in a manner that avoids a portion of the gear train at the center of the movement 10.

[0050] In addition, such as Figure 5 As shown, when viewed from the side in a direction parallel to the surface of the rear cover 9, the first magnetic-resistant component 31 is disposed between the base plate 11 and the wheel train clamping plate 25. Specifically, the first magnetic-resistant component 31 is at the same height as a portion of the wheel train and is disposed within the area where the wheel train is disposed in the Z direction perpendicular to the surface of the base plate 11.

[0051] Furthermore, the same height in this embodiment is not limited to a state where the height of a portion of the components constituting the gear train, such as the second wheel 52, the third wheel 53, the fourth wheel 54, the transmission wheel 58, the pawl, and the eccentric wheel 57, is aligned with the height of the first magnetically resistant component 31. For example, when viewed from the side, this includes a state where the first magnetically resistant component 31 overlaps with a portion of the component, and a state where the first magnetically resistant component 31 is positioned closer to the base plate than the component positioned on the rear cover side of the gear train. In this embodiment, the first magnetically resistant component 31 is positioned closer to the base plate side than the eccentric wheel 57. That is, since the first magnetically resistant component 31 is positioned at a height within the Z-direction range of the components constituting the gear train when viewed from the side, the thickness of the watch 1 can be reduced compared to the case where the magnetically resistant component is positioned on the rear cover 9 side of the movement 10, as in the prior art.

[0052] like Figure 7 As shown, in a top view, a second magnetically resistant member 32 is disposed outside the first magnetically resistant member 31 and inside the outer periphery of the base plate 11. Specifically, the second magnetically resistant member 32 is disposed such that it covers at least a portion of the side surface of the coil assembly 24 (see reference). Figure 10 Furthermore, the second magnetic-resistant component 32 is in contact with a portion of the first magnetic-resistant component 31 (see reference). Figure 10 ).

[0053] Furthermore, the first magnetic-resistant component 31 and the second magnetic-resistant component 32 are formed of pure iron, permalloy, etc., similar to the magnetic-resistant component 30 on the dial side.

[0054] like Figure 8A , Figure 8B , Figure 8C As shown, the annular first magnetically resistant member 31 includes a first main body portion 31a, a second main body portion 31b, a first contact portion 31c, and a second contact portion 31d. Specifically, the first magnetically resistant member 31 has: a side portion 31a2 extending from the first main body portion 31a toward the side of the coil assembly 24; and a first contact portion 31c and a second contact portion 31d continuously disposed with the side portion 31a2 and serving as overlapping portions constituting overlapping areas.

[0055] The second main body portion 31b is positioned higher than the first main body portion 31a, separated by a step difference portion 31a1. The first contact portion 31c and the second contact portion 31d are positioned lower than the first main body portion 31a, separated by a side portion 31a2.

[0056] like Figure 9A as well as Figure 9B As shown, the second magnetically resistant member 32 is bent to surround half of the outer periphery of the first magnetically resistant member 31. The second magnetically resistant member 32 includes a first main body portion 32a, a second main body portion 32b, a first contact portion 32c, a second contact portion 32d, and a fixing portion 32e.

[0057] Specifically, the first main body portion 32a and the second main body portion 32b are disposed at the same height. The first contact portion 32c is disposed at a lower position than the first main body portion 32a, separated by a step difference portion 32a1. The second contact portion 32d is disposed at a lower position than the second main body portion 32b, separated by a step difference portion 32b1. The fixing portion 32e is disposed at a lower position than the first main body portion 32a and the second main body portion 32b, separated by step differences portions 32a2 and 32b2.

[0058] That is, the first magnetically resistant component 31 has a stepped difference in the axial direction (Z direction) of the housing 2, and in this embodiment, it has a stepped difference portion 31a1. A large steel wheel 29, as part of the gear train, is arranged within the stepped difference formed by the stepped difference portion 31a1. Thus, since part of the gear train is arranged within the stepped difference of the first magnetically resistant component 31, in other words, since the first magnetically resistant component 31 is housed within the height range of the gear train, it is possible to arrange the first magnetically resistant component 31 within the movement 10 while making the watch 1 thinner. Furthermore, by providing a stepped difference, it is not necessary to provide a cut on the first magnetically resistant component 31 to avoid the large steel wheel 29, and the first magnetically resistant component 31 can be made into a continuous ring shape. As a result, as will be described later, the influence of external magnetic fields on the stator 24b can be reduced.

[0059] like Figure 7As shown, at part E, the first magnetically resistant component 31 and the second magnetically resistant component 32 make contact in the overlapping area where the first contact portion 31c and the first contact portion 32c overlap. Furthermore, the first magnetically resistant component 31 and the second magnetically resistant component 32 are fixed to, for example, the base plate 11 by a first fixing screw 13a (see reference). Figure 10 On the other hand, at part F, the second contact portion 31d of the first magnetically resistant component 31 contacts the second contact portion 32d of the second magnetically resistant component 32. Furthermore, the first magnetically resistant component 31 and the second magnetically resistant component 32 are fixed to, for example, the base plate 11 by the second fixing screw 13b (see reference). Figure 11 ).

[0060] When viewed from the rear cover 9 side, the continuous portion of the first main body 31a and the side portion 31a2 of the first magnetic-resistant component 31 is covered by the wheel train clamp 25. When viewed from the rear cover 9 side, the contact portions 31c and 31d are covered by the second magnetic-resistant component 32. Therefore, even if wrinkles or cracks occur between the first main body 31a and the contact portions 31c and 31d of the first magnetic-resistant component 31, the wheel train clamp 25 or the second magnetic-resistant component 32 can hide the wrinkles or cracks in the first magnetic-resistant component 31 in a way that is difficult for the user to see, thereby suppressing the degradation of appearance quality.

[0061] Furthermore, the fixing portion 32e of the second magnetically resistant component 32 is fixed to the base plate 11 without passing through the first magnetically resistant component 31. Moreover, the contact between the first magnetically resistant component 31 and the second magnetically resistant component 32 is not limited to two locations; contact can occur at three or more locations. Furthermore, contact is not limited to the first contact portions 31c, 32c, and the second contact portions 31d, 32d; contact can also occur using other portions.

[0062] In this way, by arranging the first magnetically resistant component 31 and the second magnetically resistant component 32 in contact with each other, a magnetic conduction path that does not pass through an air layer can be formed between the second magnetically resistant component 32 and the first magnetically resistant component 31, thereby improving the magnetic resistance performance. In addition, by assembling the first magnetically resistant component 31 and the second magnetically resistant component 32 within the movement 10, the watch 1 can be miniaturized compared to placing the magnetically resistant component between the movement 10 and the case 2.

[0063] In addition, such as Figure 5As shown, the pendulum 15 has a weight 15C and a hammer body 15A supporting the weight 15C. To facilitate smooth rotation of the pendulum 15, the thickness L1 of the weight 15C is thicker than the thickness L2 of the hammer body 15A. However, a portion of the weight 15C is positioned at the step difference corresponding to the step difference of the first magnetically resistant member 31 (i.e., the step difference between the first main body portion 31a and the contact portions 31c, 31d), thereby enabling the clock 1 to be thinner compared to the case where the thickness of the clock 1 increases due to the weight 15C thickening in the +Z direction, as is the case in the prior art.

[0064] Next, refer to Figure 12 The following explains how the configuration of the first magnetically resistant component 31 affects, for example, how much magnetic flux density affects the stator 24b constituting the coil assembly 24.

[0065] Figure 12 This is a graph showing the results of magnetic field analysis obtained by analyzing the relationship between the strength (G) of the externally received magnetic field and the magnetic flux density (T) generated in the stator 24b for different shapes of the first magnetically resistant component 31. The horizontal axis represents the strength (G) of the externally received magnetic field, which increases as it moves to the right. The vertical axis represents the magnetic flux density (T) generated in the stator 24b, which increases as it moves upward.

[0066] The magnetically resistant components used in magnetic field analysis come in five shapes: ring-shaped (i.e., annular), C-ring with a partial ring defect, narrow rectangle, wide rectangle 1, and wide rectangle 2. Furthermore, as an analytical condition, since the magnetic resistance performance depends on the volume of the magnetically resistant component, all shapes are designed as plates with a uniform thickness. Moreover, all shapes except wide rectangle 2 have the same volume; only wide rectangle 2 is shorter in length than wide rectangle 1 and has a smaller volume than the other shapes. Additionally, each magnetically resistant component is arranged to overlap with the stator in the coil assembly.

[0067] like Figure 12 As shown, the most effective shape is a ring shape, where the magnetic flux density affecting the stator 24b is small even when the external magnetic field strength is high. As in this embodiment, since the first magnetically resistant member 31 is ring-shaped, the influence of the external magnetic field can be minimized.

[0068] As described above, the clock 1 of this embodiment includes: a cylindrical housing 2; a back cover 9 disposed on one side of the housing 2 and having a transparent area; and a movement 10 housed in the housing 2 and having a coil assembly 24, a first magnetically resistant member 31 covering at least a portion of the coil assembly 24 on the side of the back cover 9, and a second magnetically resistant member 32 covering at least a portion of the side of the coil assembly 24. When viewed from above in a direction perpendicular to the back cover 9, the first magnetically resistant member 31 has an overlapping area that overlaps with the second magnetically resistant member 32, and the first magnetically resistant member 31 and the second magnetically resistant member 32 are disposed in contact in the overlapping area.

[0069] According to this structure, since the first magnetically resistant component 31 and the second magnetically resistant component 32 overlap and contact each other in the overlapping area, a magnetic conduction path that does not pass through the air layer can be formed. Moreover, wrinkles or cracks generated on the first magnetically resistant component 31 can be hidden by the second magnetically resistant component 32 which is disposed on the side of the coil assembly 24, thereby suppressing the degradation of appearance quality.

[0070] Furthermore, in the clock 1 of this embodiment, it is preferable that multiple overlapping regions are provided. According to this structure, since multiple overlapping regions are provided, multiple magnetic conduction paths can be formed, thereby improving magnetic resistance.

[0071] In addition, in the watch 1 of this embodiment, the movement 10 preferably includes a gear train and a gear train clamp 25 for holding the gear train. The first magnetically resistant component 31 includes: a first main body portion 31a that covers at least a portion of the coil assembly 24 on the side of the rear cover 9; a side portion 31a2 that extends from the first main body portion 31a toward the side of the coil assembly 24; and contact portions 31c and 31d that are continuously disposed with the side portion 31a2 and form an overlapping area. When viewed from the rear cover 9 side, the continuous portion of the first main body portion 31a and the side portion 31a2 is covered by the gear train clamp 25. When viewed from the rear cover 9 side, the contact portions 31c and 31d are covered by the second magnetically resistant component 32.

[0072] According to this structure, since the wheel clamp 25 is arranged on the rear cover 9 side of the first magnetically resistant component 31, and the second magnetically resistant component 32 is arranged on the side 31a2, contact portion 31c, and 31d of the first magnetically resistant component 31, the first magnetically resistant component 31 can be hidden so that it is not easily visible from the outside through the transparent area. That is, wrinkles and cracks generated when bending or other processing is performed on the first magnetically resistant component 31 can be hidden, thereby suppressing the degradation of appearance quality.

[0073] Furthermore, in the watch 1 of this embodiment, it is preferable that the movement 10 has a pendulum 15, which has a weight 15C and a hammer body 15A supporting the weight 15C. When viewed from the side in a direction parallel to the surface of the back cover 9, a stepped difference is provided between the first main body portion 31a and the contact portions 31c, 31d, and a portion of the weight 15C is disposed in the stepped difference. According to this structure, since a portion of the weight 15C is disposed in the stepped difference, even if, for example, the weight 15C is formed to be thicker than the hammer body 15A in order to make the pendulum 15 easier to rotate, the protrusion of the weight 15C toward the back cover 9 side can be suppressed, and the watch 1 can be made thinner.

[0074] Furthermore, in the clock 1 of this embodiment, the clock component preferably includes a coil 24a, a stator 24b, a rotor 40, and a coil assembly 24. According to this structure, the clock component is the coil assembly 24, and a first antimagnetic component 31 and a second antimagnetic component 32 are arranged on the rear cover 9 side or side of the coil assembly 24, thus suppressing the influence of external magnetic fields on the coil assembly 24.

[0075] Furthermore, in the clock 1 of this embodiment, the movement 10 preferably has a mechanical energy source, and the coil assembly 24 is a generator 28 that converts energy from the mechanical energy source into electricity. According to this structure, in the clock 1 having both a mechanical energy source and a generator 28, it is possible to suppress the influence of external magnetic fields on the generator 28.

[0076] Furthermore, in the watch 1 of this embodiment, it is preferable that the first magnetically resistant component 31 and the second magnetically resistant component 32 are in contact in the overlapping area by being fixed in the axial direction of the housing 2 by screws 13a and 13b. According to this structure, by fixing with screws 13a and 13b, the first magnetically resistant component 31 and the second magnetically resistant component 32 can be reliably contacted, thereby forming a magnetic conduction path that does not pass through an air layer. In addition, since threaded fixing is possible in the axial direction, the movement 10 can be easily assembled.

[0077] Hereinafter, variations of the above-described embodiments will be described.

[0078] In the above-described embodiment, as a structure for forming a magnetic path that does not pass through an air layer, a structure is described in which the first magnetically resistant member 31 and the second magnetically resistant member 32 are contacted and fixed by the first fixing screw 13a and the second fixing screw 13b, but it is not limited to this. For example, it may be as follows: Figures 13A-13C As shown.

[0079] Figure 13A The diagram shows a structure in which the first magnetically resistant component 31 is pressed by a spring force to make it contact the second magnetically resistant component 32. Figure 13BThe diagram illustrates a configuration in which a protrusion formed on the first magnetically resistant member 31 is inserted into a hole formed on the second magnetically resistant member 32 for contact fixation. Alternatively, the first magnetically resistant member 31 and the second magnetically resistant member 32 may be configured in opposite ways. Figure 13C The first magnetically resistant component 31 and the second magnetically resistant component 32 are contacted and fixed using the clamping member 14. According to these methods, a magnetic path that does not pass through an air layer can be formed between the second magnetically resistant component 32 and the first magnetically resistant component 31, thereby improving the magnetic resistance performance.

[0080] In the above-described embodiment, a clock 1 is described as an electronically controlled mechanical clock. This clock 1 has a mainspring, a generator 28 that generates electrical energy driven by the mainspring, and an IC that controls the rotational speed of the display gear train 50, but is not limited thereto. For example, it can be applied to mechanical clocks that do not have a generator 28 but have a mechanical energy source with a mainspring, a pendulum 15, an automatic winding gear train that winds the mainspring based on the rotation of the pendulum 15, a balance wheel, and other speed regulators. It can also be applied to quartz clocks that have a battery, a quartz oscillator, and a motor that drives the hands.

[0081] Based on this structure, it is possible to balance the maintenance of magnetic resistance and the miniaturization of clocks in both mechanical and quartz models.

Claims

1. A type of clock, The clock features: A cylindrical shell; The rear cover covers an opening on one side of the housing and has a transparent area that allows the interior of the housing to be seen from the outside; as well as The movement, housed within the case, includes a watch component, a first antimagnetic component covering at least a portion of the watch component on the back cover side, and a second antimagnetic component covering at least a portion of the side of the watch component; a gear train; and a support member for holding the gear train. The first magnetically resistant component has: When viewed from a top view perpendicular to the rear cover, the overlapping area that overlaps with the second magnetic-resistant component; The main body covers at least a portion of the watch component on the side near the back cover; The side portion extends from the main body portion toward the side of the watch component; and An overlapping portion, which is continuously disposed with the side portion and constitutes the overlapping area, When viewed from above the rear cover side, the continuous portion of the main body and the side is covered by the support member. When viewed from above the rear cover side, the overlapping portion is covered by the second magnetic-resistant component. The first magnetically resistant component and the second magnetically resistant component are configured to contact each other in the overlapping region.

2. The clock according to claim 1, wherein, Multiple overlapping regions are provided.

3. The clock according to claim 1, wherein, The movement includes a pendulum, which has a weight and a hammer body supporting the weight. When viewed from the side in a direction parallel to the surface of the rear cover, a stepped difference is provided between the main body and the overlapping portion. A portion of the weight is positioned at the step difference.

4. The clock according to claim 1, wherein, The clock component is a coil assembly with a coil and a stator.

5. The clock according to claim 4, wherein, The mechanism has a mechanical energy source. The coil assembly constitutes a generator that converts energy from the mechanical energy source into electricity.

6. The clock according to claim 1, characterized in that, The first and second magnetic components are in contact in the overlapping area by being fixed with screws in the axial direction of the housing.

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