Movement and time piece

Abstract

To provide a movement and a time piece that can be used for both manual winding and automatic winding.SOLUTION: A movement 13 includes a first gear 46 that constitutes an automatic winding train wheel 40 and receives rotational force from an oscillating weight 41 by a pawl lever 50, a second gear 47 that rotates coaxially and integrally with the first gear 46 and meshes with a ratchet wheel 48, a third gear 70 that constitutes a manual winding train wheel 60 connected to a crown 7 and meshes with the second gear 47, and a shaft-like member 71 for rotatably fixing the third gear 70 to a receiving component 80, where the shaft-like member 71 has a restricting part 72 for restricting the swing of arms 52 and 54 of the claw lever 50 in the thickness direction.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a movement and a watch.

Background Art

[0002] Conventionally, mechanical watches that use the mechanical energy of a spring to drive the hands are known. As such mechanical watches, there are manual winding types in which the mainspring is wound by turning the crown by hand, automatic winding types in which the mainspring is wound by rotating a rotor, and some that can use both of these methods in combination. Patent Document 1 discloses a watch that can use both manual winding and automatic winding, and in order to achieve miniaturization, a transmission gear of the manual winding wheel train is made common with the transmission gear of the automatic winding wheel train using a pawl lever.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the watch described in Patent Document 1, a pawl lever that transmits the rotational force from the rotor to the transmission gear is attached eccentrically in a cantilever shape above the first transmission gear of the automatic winding wheel train. Therefore, when an impact or the like is applied, the pawl lever may sway in the thickness direction, causing the transmission gear to disengage from the transmission gear.

Means for Solving the Problems

[0005] The movement comprises an automatic winding wheel train, a first gear that receives the rotational force from the rotating weight by means of a pawl lever, a second gear that rotates coaxially and integrally with the first gear and meshes with a square hole wheel, a manual winding wheel train that leads to a fusee, a third gear that meshes with the second gear, and a shaft member for rotatably fixing the third gear to a receiving part. The shaft member has a regulating part for regulating the sway in the thickness direction of the arm of the pawl lever.

[0006] The timepiece includes the movement described above and a case.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0008] First, as an example of the timepiece 1 according to the present embodiment, a wristwatch that can be used in combination with manual winding and automatic winding will be described with reference to FIGS. 1 and 2. For the sake of convenience of explanation, FIGS. 1 and 2 illustrate the X-axis, Y-axis, and Z-axis as three mutually orthogonal axes. Also, the direction along the X-axis is referred to as the "X direction", the direction along the Y-axis is referred to as the "Y direction", and the direction along the Z-axis is referred to as the "Z direction". Further, the tip side of the arrow in each axial direction is also referred to as the "plus side", and the base end side is also referred to as the "minus side".

[0009] As shown in FIGS. 1 and 2, the clock 1 includes an outer case 2, a back cover 9, a cover glass 5, and a dial 3. The outer case 2 is configured by fitting a bezel 22 formed of ceramic or metal onto a cylindrical case body 21 formed of metal. A disk-shaped dial 3 is disposed on the inner peripheral side of the bezel 22 via an annular dial ring 6 formed of plastic. A crown 7 is provided at the 3 o'clock position on the side surface of the outer case 2 for time display.

[0010] Of the two openings of the metal case body 21 of the clock 1, the opening on the front surface side, which is the plus side in the Z direction, is closed by the cover glass 5 via the bezel 22, and the opening on the back surface side, which is the minus side in the Z direction, is closed by the back cover 9 formed of metal. Metal materials such as brass, stainless steel, and titanium are used for the case body 21 and the back cover 9. Note that a material other than metal, such as resin, may be used for the case body 21.

[0011] Next, the internal structure incorporated in the outer case 2 of the clock 1 will be described. As shown in FIG. 2, a dial ring 6, a time display unit 10 including a dial 3, and a movement 13 are housed in a space surrounded by the outer case 2, the back cover 9, and the cover glass 5.

[0012] The outer peripheral end of the dial ring 6 is in contact with the inner peripheral surface of the bezel 22, and the dial ring 6 includes a flat plate portion whose one surface is parallel to the cover glass 5 and an inclined portion inclined toward the dial 3 side. The dial ring 6 has an annular shape in plan view and a mortar shape in cross-sectional view.

[0013] The time display unit 10 is driven by power such as a battery to display time, and includes an hour hand 4A, a minute hand 4B, and a second hand 4C, which are hands, between the dial 3 and the cover glass 5, and is disposed inside the dial ring 6.

[0014] Between the dial plate 3 and the back cover 9, a movement 13 attached to the base plate 12 is arranged. The movement 13 can be used in combination with manual winding and automatic winding, and drives the hour hand 4A, minute hand 4B, and second hand 4C shown in FIG. 1 via a spring and a wheel train (not shown). The hour hand 4A, minute hand 4B, and second hand 4C are attached to a pointer shaft 11 provided at the center of the plane of the dial plate 3. A winding reel 8 is attached to the movement 13, and a fuse 7 is attached to the end of the winding reel 8.

[0015] Next, the configuration of the manual winding and automatic winding of the movement 13 will be described with reference to FIGS. 3, 4, and 5. Note that FIGS. 3, 4, and 5 are views of the main part of the movement 13 as seen from the side of the back cover 9. FIG. 4 is a view with the eccentric shaft portion restraining part 76 provided on the first transmission wheel 43 removed, and FIG. 5 is a view with the first gear 46 of the second transmission wheel 45 removed.

[0016] As shown in FIGS. 3, 4, and 5, the movement 13 includes a second transmission wheel 45 that transmits rotation to a ratchet wheel 48 via a spring (not shown), an automatic winding wheel train 40 that transmits the rotation of the rotating weight 41 to the second transmission wheel 45, and a manual winding wheel train 60 that transmits the rotation of the winding reel 8 connected to the fuse 7 to the second transmission wheel 45.

[0017] The second transmission wheel 45 includes a first gear 46 and a second gear 47. The first gear 46 and the second gear 47 rotate coaxially and integrally. The first gear 46 is a ratchet gear, and the pulling claw 53 and the pushing claw 55 of the claw lever 50 are engaged on both sides across the rotation axis. The second gear 47 meshes with the ratchet wheel 48 and the third gear 70 of the third ratchet transmission wheel 69.

[0018] The automatic winding wheel series 40 of the automatic winding mechanism transmits the rotation of the rotating weight 41 to the second transmission wheel 45 via the rotating weight gear 42 that rotates integrally with the rotating weight 41, the first transmission wheel 43, and the claw lever 50. As shown in FIG. 4, the first transmission wheel 43 includes an offset gear 44 and an eccentric shaft portion 77 eccentric to a part of the shaft portion 75. The offset gear 44 is interposed between the first gear 46 of the second transmission wheel 45 and the rotating weight gear 42 attached to the shaft of the rotating weight 41, and meshes with the rotating weight gear 42. The claw lever 50 is attached eccentrically in a cantilever shape above the offset gear 44.

[0019] As shown in FIG. 5, the claw lever 50 includes a lever body 51 and two arms 52, 54 extending from the lever body 51. A pulling claw 53 is provided at the tip of the arm 52, and a pushing claw 55 is provided at the tip of the arm 54. The claw lever 50 transmits the rotation of the first transmission wheel 43 to the second transmission wheel 45 as a one-way rotation. The claw lever 50 has a guide hole 78 in which the eccentric shaft portion 77 of the first transmission wheel 43 is guided, and is made to be able to advance and retreat with respect to the second transmission wheel 45 in conjunction with the rotation of the first transmission wheel 43. The pulling claw 53 and the pushing claw 55 are engaged with the first gear 46 of the second transmission wheel 45.

[0020] When the first transmission wheel 43 rotates, the claw lever 50 repeats a reciprocating motion. That is, when the claw lever 50 retreats with respect to the second transmission wheel 45, it pulls one end of the second transmission wheel 45 with the pulling claw 53, and when it advances with respect to the second transmission wheel 45, it pushes the other end of the second transmission wheel 45 with the pushing claw 55. Thereby, the second transmission wheel 45 is intermittently rotated in the winding-up direction of the spring.

[0021] According to the above-described automatic winding wheel train 40, when the rotating weight 41 rotates, the first transmission wheel 43 rotates, and this rotation is transmitted as a one-way rotation to the second transmission wheel 45 by the claw lever 50. Due to the rotation of the second transmission wheel 45, the square hole wheel 48 rotates to wind up the spring in the incense box carriage. That is, the first gear 46 of the second transmission wheel 45 that receives the rotational force from the rotating weight 41 by the claw lever 50 rotates, and the square hole wheel 48 rotates via the second gear 47 that rotates integrally with the first gear 46 coaxially, thereby winding up the spring in the incense box carriage.

[0022] As shown in FIG. 3, the manual winding wheel train 60 of the manual winding mechanism includes a winding spool 8 to which a fuse 7 is attached, a ratchet wheel (not shown), a click wheel 61, a round hole wheel 62, a square hole first transmission wheel 63, a square hole second transmission wheel 67, and a square hole third transmission wheel 69. The square hole first transmission wheel 63 includes a fifth gear 64, the square hole second transmission wheel 67 includes a fourth gear 68, and the square hole third transmission wheel 69 includes a third gear 70. The fifth gear 64 meshes with the gear of the round hole wheel 62 and the fourth gear 68. The fourth gear 68 meshes with the fifth gear 64 and the third gear 70. The third gear 70 meshes with the fourth gear 68 and the second gear 47 of the second transmission wheel 45.

[0023] When the user rotates the fuse 7, the winding spool 8 and the ratchet wheel rotate. The ratchet wheel meshes with the click wheel 61, and the rotation of the ratchet wheel is sequentially transmitted from the click wheel 61 to the round hole wheel 62, the square hole first transmission wheel 63, the square hole second transmission wheel 67, and the square hole third transmission wheel 69. The rotation transmitted to the square hole third transmission wheel 69 rotates the square hole wheel 48 via the second gear 47 of the second transmission wheel 45, so that the spring in the incense box carriage is wound up.

[0024] A clutch mechanism for preventing the power of the automatic winding wheel train 40 from being transmitted to the fuse 7 when rotating the square hole wheel 48 with the automatic winding wheel train 40 to wind up the spring is provided on the fifth gear 64 of the square hole first transmission wheel 63 in the middle of the manual winding wheel train 60.

[0025] On the shaft portion 65 of the angular hole first transmission gear 63 having the fifth gear 64, a shaft called cat's eye having two different planes of the central axis is provided. When manual winding for rotating the fuse 7 is performed, the fifth gear 64 rotates on the surface where the central axis approaches the manual winding wheel train 60, thereby transmitting the rotation of the round hole wheel 62 to the fourth gear 68. On the other hand, in the case of automatic winding, the fifth gear 64 rotates on the surface where the central axis moves away from the manual winding wheel train 60, thereby disengaging from the engagement with the round hole wheel 62 and preventing the power transmitted through the second gear 47 of the second transmission gear 45 from being transmitted to the fuse 7. At that time, the fifth gear 64 rotated by the spring 66 is pulled closer to the side approaching the manual winding wheel train 60 so that it can mesh immediately during manual winding again.

[0026] Next, a method for preventing the disengaging of the pulling claw 53 and the pushing claw 55 of the claw lever 50 from the first gear 46 of the second transmission gear 45, which occurs when an impact or the like is applied, will be described.

[0027] As shown in FIG. 5, the arm 52 provided with the pulling claw 53 of the claw lever 50 can be restricted from swinging in the direction of the receiving component 80 in the thickness direction of the arm 52 by a rod-shaped axial restricting portion 74 that vertically rises from the receiving component 80.

[0028] As shown in FIG. 5, the arm 54 provided with the pushing claw 55 of the claw lever 50 can be restricted from swinging in the direction of the receiving component 80 in the thickness direction of the arm 54 by a restricting portion 72 of a shaft-like member 71 for rotatably fixing the third gear 70 of the angular hole third transmission gear 69 to the receiving component 80.

[0029] The shaft-like member 71 is a rod-shaped member that vertically rises from the receiving component 80 while being fixed to the receiving component 80, and a flat portion 73 disposed at the upper end of the shaft-like member 71 functions as a restricting portion 72 that restricts swinging.

[0030] In addition, the swinging of the arms 52 and 54 of the claw lever 50 in the direction of the back cover 9 in the thickness direction can be restricted by the flat portions of the arms 52 and 54 abutting against a wheel train receiver (not shown).

[0031] As described above, according to the clock 1 including the movement 13 according to the embodiment, the following effects can be obtained.

[0032] Since the movement 13 has a regulating portion 72 on a shaft-like member 71 for rotatably fixing the third gear 70 of the square-hole third transmission gear 69 to a receiving component 80, when an impact or the like is applied, the arm 54 of the pawl lever 50 abuts against the regulating portion 72, so that the sway in the thickness direction of the arm 54 of the pawl lever 50 can be regulated, and the push pawl 55 of the pawl lever 50 can be prevented from disengaging from the first gear 46 of the second transmission gear 45.

[0033] In addition, since the manual winding wheel train 60 is provided with a clutch mechanism on the fifth gear 64 of the square-hole first transmission gear 63 in the middle of the manual winding wheel train 60, when the automatic winding wheel train 40 winds the square-hole wheel 48, the power of the automatic winding wheel train 40 can be prevented from being transmitted to the fuse 7.

Explanation of Reference Numerals

[0034] 1... clock, 2... outer case, 3... dial, 4A... hour hand, 4B... minute hand, 4C... second hand, 5... cover glass, 6... dial ring, 7... fuse, 8... winding stem, 9... back cover, 10... time display portion, 11... pointer shaft, 12... floor plate, 13... movement, 21... case body, 22... bezel, 40... automatic winding wheel train, 41... rotor, 42... rotor gear, 43... first transmission gear, 44... offset gear, 45... second transmission gear, 46... first gear, 47... second gear, 48... square-hole wheel, 50... pawl lever, 51... lever body, 52... arm, 53... pull pawl, 54... arm, 55... push pawl, 60... manual winding wheel train, 61... ratchet wheel, 62... round-hole wheel, 63... square-hole first transmission gear, 64... fifth gear, 65... shaft portion, 66... spring, 67... square-hole second transmission gear, 68... fourth gear, 69... square-hole third transmission gear, 70... third gear, 71... shaft-like member, 72... regulating portion, 73... flat portion, 74... shaft-like regulating portion, 75... shaft portion, 76... eccentric shaft portion suppressing component, 77... eccentric shaft portion, 78... guide hole, 80... receiving component, 81, 82... bent portion.

Claims

1. A first gear that forms an automatic winding wheel train and receives the rotational force from the rotating weight by means of a pawl lever, A second gear that rotates integrally with the first gear coaxially and meshes with a square hole wheel, A manual winding wheel train that leads to a fusee, and a third gear that meshes with the second gear, A shaft member for rotatably fixing the third gear to a receiving component, and having, The shaft member has a regulating portion for regulating the sway in the thickness direction of the arm of the pawl lever. Movement.

2. The shaft member is a rod-shaped member that stands vertically from the receiving component while being fixed to the receiving component, A flat portion disposed at the upper end of the shaft member functions as the regulating portion for regulating the sway. The movement according to claim 1.

3. A clutch mechanism for preventing the power of the automatic winding wheel train from being transmitted to the fusee when winding the square hole wheel with the automatic winding wheel train is provided in the middle of the manual winding wheel train. The movement according to claim 1.

4. The manual winding wheel train has a fourth gear and a fifth gear in order from the side closer to the third gear, The clutch mechanism is provided on the fifth gear. The movement according to claim 3.

5. An offset gear is interposed between the first gear and a rotating weight gear attached to the shaft of the rotating weight, The pawl lever is eccentrically attached in a cantilever shape above the offset gear. The movement according to claim 1.

6. Any one of the movements according to claims 1 to 5, and An outer case, and A watch.

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