JP3632595B2 - Slip mechanism and watch - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a slip mechanism and a timepiece.
[0002]
[Background]
2. Description of the Related Art Conventionally, in a mainspring-driven wristwatch or the like, during normal hand movement, a cylindrical pinion to which a minute hand is attached and a second wheel inserted in the cylindrical pinion rotate together on the same axis.
On the other hand, at the time correction when the rotation of the entire train wheel including the second wheel is stopped, a large rotational torque by the crown operation is given to the cylinder pinion via the wheel train for time correction. Slip (slip) occurs between them, and only the cylindrical pinion rotates.
[0003]
In such a second wheel & pinion, the shaft portion to be inserted into the cylindrical pinion is formed in a tapered shape, and the second pinion is caulked from the outer peripheral side so as to correspond to the tapered portion. The shaft portion of the car and the cylindrical pinion are brought into contact with each other. At the time of normal hand movement, the second wheel and the hour pinion rotate together with the contact resistance at this time, and at the time adjustment, the torque at the time of crown operation exceeding the contact resistance rotates only the hour pinion.
[0004]
[Problems to be solved by the invention]
However, in the structure in which the pinion is crimped and brought into contact with the shaft portion of the center wheel, the contact state is maintained only by the side pressure of the caulking portion. It is difficult to secure the initial torque against the rotation of the center wheel at the time, and the cylindrical pinion is likely to slip. For this reason, there is a possibility that the time display cannot be performed accurately due to an impact from the outside or an external magnetic field, and there is a limit to using it for a longer period.
[0005]
In addition, as a slip mechanism used for a timepiece or the like, there is a structure that causes a slip between a gear forming a wheel and a kana.
One of them is that the gear and the kana are provided separately, and the surface portion of the gear is punched out in an amid shape to provide springiness, and slips between the gear and the kana with a torque exceeding this spring force. It is the structure which produces.
The other is a structure in which a gear and a kana are separately provided, and one of these is provided with a spring member that makes point contact with the other at a plurality of points.
[0006]
However, these structures in which the gear and the kana are separated from each other are effective when a gear with a large diameter is used because the gear is punched in an amid shape, or a spring member is attached to or contacted with the gear. For example, it is difficult to apply to a member having a gear having a small diameter, such as the above-described cylinder.
[0007]
An object of the present invention is to provide a slip mechanism that can ensure long-term reliability and is not easily restricted by the size of a member, and a timepiece including the slip mechanism.
[0008]
[Means for Solving the Problems]
The slip mechanism of the present invention includes an outer member that can rotate or rotate, and an inner member that is inserted into the outer member and is rotatable coaxially, and one of these outer member and inner member is provided. The member is provided with a cylindrical portion opposed to the peripheral surface of the other member, and the cylindrical portion is provided with a slit and a pressing piece portion sandwiched between the slits, and the pressing piece portion is provided on the other side. Press the peripheral surface of the memberA slip mechanism, wherein the tubular portion is provided on the outer member;It is characterized by that.
[0009]
In such a configuration, for example, if the cylindrical part is provided on the outer member, the pressing piece provided on the cylindrical part presses the outer peripheral surface of the inner member. Since this acts as a leaf spring, it will press the inner member over a long period of time, improving the reliability. In addition, since a conventional amid-like punching and a separate spring member are not used, it is difficult to be restricted by the size of the member.And in the slip mechanism of this invention, since the said cylindrical part is provided in the said outer member, since a cylindrical part, ie, a slit and a press piece part, is provided in the outer member thicker than an inner member, a process is easy. Thus, the yield of each member is improved.
In addition, from the slit, the degree of sliding can be visually confirmed, and if there are quality abnormalities such as torque fluctuations remaining as traces such as streaks, the streaks can be easily confirmed with the naked eye..
[0010]
In the slip mechanism of the present invention, it is desirable that a protruding portion protruding in the radial direction is provided on the pressing piece portion of the one member or the peripheral surface of the other member.
In such a configuration, since the pressing piece is reliably bent by the amount of the protrusion, the spring force is stably generated.
[0012]
On the other hand, the timepiece of the present invention is characterized by including any of the slip mechanisms described above, and even in such a timepiece, the above-described effects can be obtained and the object of the present invention can be achieved.
[0013]
In the timepiece of the present invention, the slip mechanism is preferably provided in a time adjustment mechanism that corrects the time display, and the time display during normal hand movement is accurately performed over a long period of time, and constitutes the time adjustment mechanism. Parts cost and assembly cost of parts are reduced.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view showing a main part of an electronically controlled mechanical timepiece that is timekeeping according to an embodiment of the present invention, and FIGS. 2, 3, and 4 are sectional views thereof.
[0015]
The electronically controlled mechanical timepiece has a spiral spring 1, a generator 2 that converts mechanical energy accumulated in the spring 1 into electrical energy, and mechanical energy is manually input to the spring 1. A manual winding upper part 3 and an automatic winding upper part 4 for automatically inputting mechanical energy to the mainspring 1 are provided.
Here, in the present embodiment, the mechanical energy is an elastic force generated by deformation of the mainspring 1 by bending or the like when the mainspring 1 is wound up.
[0016]
The mainspring 1 is built in a barrel complete 10 consisting of a barrel gear 10a, barrel barrel 10b, and barrel barrel lid 10c, the inner end is fixed to the barrel full 10b, and the outer end slips on the barrel gear 10a above a certain spring torque It is configured. A square hole wheel 11 is fixed to the barrel complete 10b by a square hole screw 12, and the barrel complete 10b and the square hole wheel 11 are rotated together.
The square wheel 11 is in mesh with a not-shown helix so that it rotates clockwise but not counterclockwise.
The rotation of the barrel gear 10a is accelerated through a train wheel composed of the second wheel 13, the third wheel 14, the fourth wheel 15, the fifth wheel 16, and the sixth wheel 17 and is transmitted to the rotor 21 of the generator 2. Is done. These wheel trains are pivotally supported by a train wheel bridge 7, a main plate 8, and a second ring 9.
[0017]
The generator 2 is composed of a rotor 21 and coil blocks 22 and 23. In FIG. 1, the generator 2 is located below the barrel wheel 10 and is connected to the barrel wheel 10 together with a portion of the electronically controlled mechanical timepiece in the circumferential direction. Closely arranged.
The rotor 21 includes a rotor pinion 21a, a rotor magnet 21b, and a rotor inertia disc 21c. The rotor inertia disc 21c is for reducing the rotational speed fluctuation of the rotor 21 with respect to the driving torque fluctuation from the barrel complete 10.
The coil blocks 22 and 23 are each configured by winding a coil 25 around a stator (core, magnetic core) 24. Each stator 24 is integrally formed with a core stator portion 24c disposed adjacent to the rotor 21, a core winding portion 24b around which the coil 25 is wound, and a core magnetic conduction portion 24a connected to each other. It is configured.
[0018]
The stators 24, that is, the coils 25, are arranged in parallel to each other. The rotor 21 is configured such that, on the core stator portion 24c side, the central axis is disposed on a boundary line substantially between the coils 25, and the core stator portion 24c is substantially bilaterally symmetrical with respect to the boundary line. ing.
At this time, a positioning member 26 is disposed in the stator hole 24d in which the rotor 21 of each stator 24 is disposed, as shown in FIG. And the eccentric pin 27 is arrange | positioned between the intermediate part of the longitudinal direction of each stator 24, ie, the core stator part 24c, and the core magnetic conduction | electrical_connection part 24a. When the eccentric pin 27 is turned, the core stator portion 24c of each stator 24 can be brought into contact with the positioning member 26 so that the positioning can be performed accurately and easily, and the side surfaces of the core magnetic conduction portion 24a can be reliably secured. Can be contacted.
[0019]
Further, the surface on the back cover side (the upper surface side in FIG. 3) of the core magnetic conduction part 24a is in contact with a yoke 28 disposed across each core magnetic conduction part 24a. As a result, in the core magnetic conduction part 24a, two magnetic conduction paths are formed: a magnetic conduction path that passes through the side surface portion of each core magnetic conduction part 24a, and a magnetic conduction path that passes through the lower surface of the core magnetic conduction part 24a and the yoke 28. The stator 24 forms an annular magnetic circuit.
[0020]
Each coil 25 is wound in the same direction with respect to the direction from the core magnetic conduction portion 24a of each stator 24 toward the core stator portion 24c.
The end portions of these coils 25 are connected to a coil lead substrate 29 provided on the core magnetic conducting portion 24a of the stator 24 (on the lower surface side in FIG. 3). The coil lead substrate 29, the stator 24, and the yoke 28 are clamped and fixed by a train wheel bridge 7 and a circuit pressing plate 29a screwed to the train wheel bridge 7.
[0021]
AC power from the generator 2 is rectified through a rectifier circuit including step-up rectification, full-wave rectification, half-wave rectification, transistor rectification, and the like, and is then charged and supplied to a power supply circuit including the capacitor 71 shown in FIG. The The rectifier circuit and the power supply circuit are formed on a circuit block 70 as a crescent-shaped circuit board along the outer periphery of the watch. The electronically controlled mechanical timepiece according to the present embodiment controls the current value flowing through the coil 25 of the generator 2 by driving the IC 72 and the crystal unit 73 with the power from the power supply circuit in the circuit block 70, It is configured to accurately drive a pointer (time information display device) fixed to the train wheel by applying a short brake.
[0022]
One end side of the circuit block 70 is mechanically and electrically connected to the coil lead board 29 (FIG. 3) of the generator 2 in the vicinity of the barrel 10 (spring 1). The other end side of the circuit block 70 is opposite to the one end side with respect to the barrel 10 and is fixed in the vicinity of the barrel 10. Furthermore, since the circuit block 70 has a crescent shape, the other part except for one end connected to the coil lead board 29 does not overlap the generator 2 and the barrel complete 10 in a plane, and an electronically controlled mechanical timepiece. Are provided along the circumferential direction. As a result, the generator 2, the barrel wheel 10 and the circuit block 70 are all arranged in a substantially annular shape along the circumferential direction of the electronically controlled mechanical timepiece. A train wheel made up of the number wheels 13 to 17 is arranged so that the circuit block 70 does not overlap the train wheel in a plan view.
[0023]
Further, in the crescent-shaped circuit block 70, since the width on the center side is larger than the width on both ends, the IC 72 and the crystal resonator 73 as electronic circuit components are mounted on the wide portion at the center position, and the wiring pattern in the electric circuit (Conduction line) is reliably routed.
Such a circuit block 70 is formed by FPC (Flexible Printed Circuit), and is sandwiched between a circuit seat (not shown) provided on the base plate 2 and a circuit receiver. An insulating plate is interposed between the circuit receiver and the circuit block 70.
At this time, in the circuit block 70, the arrangement position in the longitudinal sectional view is shifted up and down between the central portion sandwiched between the circuit seat and the circuit receiver and the one end side portion connected to the coil lead substrate 29. However, such a shift can be satisfactorily handled by the flexibility (flexibility) of the FPC.
[0024]
As shown in FIGS. 1 and 4, the manual winding upper portion 3 includes a winding stem 31 that is connected to a crown (not shown), a hand wheel 32, a kite wheel 33, a round hole wheel 35, and a round hole transmission wheel 36. The winding wheel train 34 is provided, and is arranged on one side (first side) which is the opposite side of the above-described generator 2 across the barrel wheel 10 in which the mainspring 1 is built.
[0025]
The pinion wheel 32 is fitted near the tip of the winding stem 31. The chisel wheel 33 is fitted in the intermediate portion of the winding stem 31 and is engaged with the edge of the pinion wheel 32.
The round hole wheel 35 is arranged so as to be orthogonal to the kite wheel 33, and includes a round hole gear 35 a meshed with the peripheral edge of the kite wheel 33 and a round hole pinion 35 b meshed with the round hole transmission wheel 36. It is prepared for.
One end edge of the round hole transmission wheel 36 is engaged with the round hole pinion 35 b, and the other end edge is engaged with the square hole wheel 11 via the transmission wheel 44.
[0026]
Accordingly, when the crown is turned, the square wheel 11 is rotated through the winding stem 31, the clutch wheel 32, the kite wheel 33, the round hole wheel 35, the round hole transmission wheel 36, and the transmission wheel 44 to wind up the mainspring 1. Is possible.
[0027]
The hand-rolled wheel train 34 is also disposed so as to be surrounded by the generator 2, the barrel wheel 10, and the circuit block 70, so that the circuit block 70 does not overlap the hand-rolled wheel train 34 in a plane.
[0028]
The automatic winding unit 4 includes a rotating weight 41, an automatic winding wheel train 43 having a transmission wheel 44, and an automatic winding lever 45. The automatic winding unit 4 is adjacent to the manual winding unit 3 and has the manual winding unit 3. In the same manner as above, it is arranged on the opposite side of the generator 2 with the barrel 1 incorporating the mainspring 1 interposed therebetween.
For this reason, as shown in FIG. 1, the manual winding upper portion 3 is arranged around the center (the axis of the pointer) of the electronically controlled mechanical timepiece from the crown not shown in the circumferential direction of the electronically controlled mechanical timepiece. The automatic winding upper part 4, the mainspring 1 (the barrel wheel 10) and the generator 2 are arranged in that order.
[0029]
The rotary weight 41 is formed in a fan shape, and this arc portion is disposed along the inner edge of the watch, and is pivotally supported by a ball bearing 47 so as to be rotatable with respect to the transmission receiver 46 (FIG. 4). .
The transmission wheel 44 includes a transmission gear 44a having a ratchet tooth shape with which the tip of the automatic winding lever 45 is engaged, and a pinion 44b with which the round hole transmission wheel 36 and the square hole wheel 11 are engaged.
The automatic winding lever 45 includes a rotating part 45 a (FIG. 1) fitted to an eccentric pin 42 provided on a ball bearing 47 that rotates together with the rotating weight 41, and two extending from the rotating part 45 a to the transmission wheel 44. Arm portion 45b, and a pulling claw portion 45c and a push claw portion 45d provided at the tip of each arm portion 45b and meshed with the transmission gear 44a. The pulling claw portion 45c and the pushing claw portion 45d are arranged so as to sandwich the transmission wheel 44.
[0030]
Therefore, when the rotary weight 41 is rotated, the arm portion 45b of the self-winding lever 45 connected thereto via the eccentric pin 42 reciprocates, and the pulling claw portion 45c and the pushing claw portion 45d are utilized using this movement. The transmission gear 44a can be rotated in a certain direction. It should be noted that the rotation direction of the transmission wheel 44 is always rotated in a fixed direction regardless of which direction the rotating weight 41 rotates.
Then, by rotating the transmission wheel 44, the square wheel 11 is rotated, and the mainspring 1 is automatically wound up.
Here, the transmission wheel 44 that is the automatic winding train 43 is also used when the mainspring 1 is wound up by the manual winding upper portion 3 as described above. In other words, the manual winding wheel train 34 of the manual winding upper portion 3 inputs mechanical energy to the mainspring 1 via the transmission wheel 44. That is, the manual winding upper part 3 is configured to wind up the mainspring 1 by sharing the automatic winding wheel train 43 of the automatic winding upper part 4.
[0031]
As shown in FIG. 5, the mainspring 1 wound up by such an automatic winding upper portion 4 is provided with a slipping attachment 61 for preventing the mainspring 1 from being excessively wound.
The slipping attachment 61 is a leaf spring that has a length dimension of about one inner circumference of the barrel 10 and is thicker than the mainspring 1, and is attached to the final end of the mainspring 1. Is pressed against the inner surface of the barrel complete 10. When the mainspring 1 is completely wound up, and when further winding is performed, that is, when a torque greater than a predetermined rotational torque is applied to the mainspring 1, the mainspring 1 is moved to the inner periphery of the barrel 10 by the slipping attachment 61. The rotational torque is greater than the pressing force against the surface and slips to prevent excessive winding of the mainspring 1.
[0032]
The automatic winding train 43 described above is also disposed so as to be surrounded by the generator 2, the barrel wheel 10, and the circuit block 70, so that the circuit block 70 does not overlap the manual winding train 34 in a plane.
[0033]
Returning to FIG. 1 to FIG. 4, the accumulated amount of mechanical energy input to the mainspring 1, in other words, the remaining amount of winding of the mainspring 1 is displayed between the barrel 10 and the generator 2 on the dial side. A remaining spring remaining amount display mechanism (power reserve mechanism, winding mark mechanism) 5 is provided.
[0034]
The mainspring remaining amount display mechanism 5 includes a first display transmission wheel 51, a display intermediate wheel 52, a second display transmission wheel 53, a third display transmission wheel 54, and a display wheel 55.
The first display transmission wheel 51 is engaged with the barrel 101 kana fixed to the barrel 10b, and the kana 51a of the first display wheel 51 is rotatably fitted to the shaft of the display wheel 55. Yes.
The display intermediate wheel 52 is meshed with the barrel 52 that is fixed to the barrel gear 10 a, and the third display transmission wheel 54 is meshed with the pinion 52 a of the display intermediate wheel 52.
A second display transmission wheel 53 is rotatably supported at an eccentric position of the third display transmission wheel 54. The second display transmission wheel 53 meshes with the kana 51 a of the first display transmission wheel 51 and the display gear 55 a of the display wheel 55.
[0035]
A display cylinder 56 is fitted to the display wheel 55. The display cylinder 56 is engaged with the dial-side tip of the display wheel 55 by friction and rotates integrally with the display wheel 55. The display cylinder 56 is provided with a display needle 57 that indicates the remaining amount of the mainspring 1 wound up. Such a spring remaining amount display mechanism 5 is constituted by a so-called planetary gear mechanism in which the display wheel 55 is a sun wheel and the second display transmission wheel 53 provided in the third display transmission wheel 54 is a planetary vehicle.
[0036]
Therefore, when the square wheel 11 is rotated by the winding operation of the mainspring 1, the torque is transmitted from the barrel complete 101 to the first display transmission wheel 51. Here, when winding the mainspring 1, the barrel wheel 10a is in a stopped state, so that the display intermediate wheel 52 and the third display transmission wheel 54 are fixed. Therefore, the second display transmission wheel 53 that meshes with the kana 51a of the first display transmission wheel 51 only rotates on the spot, the rotation is transmitted from the display gear 55a to the display wheel 55, and the display cylinder 56 and the needle 57 are moved. Rotate.
[0037]
On the other hand, since the square hole wheel 11 is stopped when the mainspring 1 is rewound, the barrel 101 and the first display transmission wheel 51 are stopped. When the barrel gear 10a is rotated, the torque is transmitted from the barrel barrel 102 to the display intermediate wheel 52 and the third display transmission wheel 54. Then, since the first display transmission wheel 51 is fixed, the second display transmission wheel 53 revolves while rotating around the kana 51a, the rotation is transmitted from the display gear 55a to the display wheel 55, and the display cylinder 56 is Rotate. At this time, since the display cylinder 56 rotates in the reverse direction to the winding time, the display hand 57 also rotates in the reverse direction.
For this reason, the remaining amount of winding of the mainspring 1 is displayed by the hands 57, and the remaining amount of time of the watch can be visually observed.
[0038]
As shown in FIGS. 1 and 2, the mainspring remaining amount display mechanism 5 is thin, so that it is overlapped with a part of the generator 2 in a plan view, that is, between the barrel complete 10 and the generator 2. It is arranged on the dial side.
[0039]
Next, the clock switching operation will be described with reference to FIG. This figure is a plan view seen from the side opposite to FIG.
In the electronically controlled mechanical timepiece, during the normal operation of the dowel 91 of the setting lever 90 at the 0th stage 92a of the click spring 92, by operating the winding stem 31 connected to the crown not shown, the above-described pinion wheel 32 is operated. The square hole wheel 11 is rotated through the kite wheel 33, the round hole wheel 35, the round hole transmission wheel 36, and the transmission wheel 44, and the mainspring 1 is wound up.
[0040]
Further, when pulling the winding stem 31 and setting the dowel 91 to the first stage 92b, the small iron lever 93 does not move, only the yoke 94 moves and the pinion wheel 32 meshes with the small iron wheel 37. The calendar can be corrected via a calendar correction transmission wheel (not shown).
[0041]
In order to align the minute hand and hour hand, the crown is further pulled out, the winding stem 31 is moved in the axial direction, the dowel 91 is set in the second stage 92c, and the operation of the setting lever 90, the hammer presser 95 and the yoke 94 is continued. The small wheel 32 is moved to the small wheel 37 side and meshed, and the small wheel 37 is moved to the minute wheel 38 side by the small iron lever 93 and meshed. As shown in an enlarged view in FIG. This is done by rotating the 7a and the hour wheel 7b. And the time correction mechanism which concerns on this invention is comprised by the components used for such a hand alignment operation.
[0042]
In FIG. 7, a cylindrical pinion 7 a serving as an outer member is fitted to a shaft portion 13 a of a second wheel 13 serving as an inner member, and rotates coaxially with the second wheel 13. As shown in FIG. 8, the cylindrical pinion 7 a includes a gear portion 81 that meshes with the minute wheel 38 and a cylindrical portion 82 that accommodates the shaft portion 13 a of the center wheel 13.
Among these, the cylindrical part 82 is provided with three slits 83 along the circumferential direction. The slit 83 is provided long along the axial direction, and three portions of the portion sandwiched between the slits 83 are pressing piece portions 84.
[0043]
Protrusions 85 projecting radially inward, that is, toward the shaft portion 13a side of the center wheel & pinion 13 are provided on the inner peripheral surfaces of these pressing piece portions 84. The pressing piece portion 84 is bent slightly outward, and the outer peripheral surface of the shaft portion 13a is pressed by the spring force of the pressing piece portion 84 generated by the bending, and the cylindrical pinion 7a is integrally held by the center wheel 13 to 7a and the center wheel & pinion 13 rotate together.
Further, when a rotational torque larger than the spring force is transmitted from the minute wheel 38 side by the crown operation at the time adjustment, it is between the shaft portion 13a of the center wheel 13 and the protrusion 85 of the cylindrical pinion 7a. A slip occurs and only the cylindrical pinion 7a rotates.
That is, this structure is the slip mechanism of the present invention.
[0044]
In the present embodiment, the shaft portion 13a of the center wheel & pinion 13 is formed in a cylindrical shape because the second pinion 15a of the fourth wheel & pinion 15 is inserted. You may provide in this cylindrical axial part 13a instead of providing in the cylindrical part 82 of the kana 7a. In such a case, by providing a protrusion that contacts the inner periphery of the cylindrical portion 82 of the cylindrical pinion 7a on the outer periphery of the pressing piece portion of the shaft portion 13a, the pressing piece portion of the shaft portion 13a can be reliably secured. It is possible to bend.
[0045]
Further, the projecting portion protruding in the radial direction may be provided on the outer periphery of the shaft portion 13a in addition to the pressing piece portion 84 of the cylindrical pinion 7a as in the present embodiment. It is preferable to provide the protrusion so as to be continuous in the circumferential direction so that the protrusion on the 13a side is not caught by the slit 83. Furthermore, as described above, when the pressing piece portion is provided on the shaft portion 13a, the pressing piece portion is not limited to providing the protrusion, but may be provided on the inner periphery of the cylindrical portion 82, and Such protrusions are also provided continuously in the circumferential direction of the cylindrical portion 82.
[0046]
Incidentally, the electronically controlled mechanical timepiece is provided with a reset lever 96 (FIG. 6). The reset lever 96 operates as the setting lever 90 moves by pulling out the crown when correcting the time, and engages with the rotor 12 to stop the rotation of the entire train wheel including the second wheel 13. Further, when returning the drawn crown, the reset lever 96 rotates the rotor 12 by directly applying a rotational force.
[0047]
According to this embodiment, there are the following effects.
(1) In the slip mechanism of the above embodiment, the cylindrical portion 82 of the cylindrical pinion 7a is provided with the slit 83, and the pressing piece portion 84 sandwiched between the slits 83 bends and acts as a leaf spring, so it is resistant to wear. The shaft portion 13a of the second wheel & pinion 13 can be effectively pressed over a long period of time, and the cylindrical pinion 7a can be reliably interlocked with the rotation of the second wheel & pinion 13 during normal hand movement. Therefore, there is no fear that the time display will be distorted due to the impact from the outside or the influence of the external magnetic field, and the reliability can be improved.
[0048]
(2) Since the gear portion 81 of the cylindrical pinion 7a is not provided with an amid-like punching, or a separate spring member is not attached to or contacted with the gear portion 81, the diameter of the gear portion 81 is small. The slip mechanism can also be reliably applied to the cylindrical pinion 7a.
[0049]
(3) Furthermore, the pressing piece 84 of the cylindrical pinion 7 a is provided with a protrusion 85, and this protrusion 85 is in contact with the outer periphery of the shaft portion 13 a of the center wheel 13. The pressing piece portion 84 can be surely bent outward by the amount, and the spring force can be stably generated in the pressing piece portion 84 by this bending, and the reliability can be further improved.
[0050]
(4) In the present embodiment, the slit 83 and the pressing piece 84 are provided in the cylindrical portion 82 of the cylindrical pinion 7a that is thicker than the shaft portion 13a of the center wheel & pinion 13, and thus are provided in the shaft portion 13a. Can be easily processed, and the yield of the cylindrical pinion 7a and the center wheel & pinion 13 can be improved.
[0051]
(5) It eliminates the need for a conventional cylindrical kana crushing process, and unlike a slip mechanism in which the gear and the kana are configured separately, sub-assembly work such as an amid-shaped gear or a point contact spring member can be performed. Since it can be eliminated, workability can be improved, and component costs and assembly costs can be reduced.
[0052]
(6) Furthermore, in the cylindrical pinion 7a, the gear portion 81 and the cylindrical portion 82 are integrated, and the shaft portion 13a of the center wheel & pinion 13 is only inserted into the cylindrical portion 82. It is easy to assemble and disassemble and assemble. For this reason, the maintainability of the timepiece can be improved.
[0053]
(7) In addition, from the slit 83 provided in the cylindrical portion 82 of the cylindrical pinion 7a, the degree of slippage with the center wheel 13 can be visually observed, and quality abnormalities such as torque fluctuation remain as traces such as streaks. Things can be easily detected with the naked eye.
[0054]
In addition, this invention is not limited to the said embodiment, Other structures etc. which can achieve the objective of this invention are included, The deformation | transformation etc. which are shown below are also contained in this invention.
Although the slip mechanism of the above embodiment is provided for the cylindrical pinion 7a and the center wheel & pinion 13, the present invention is not limited to this, and the slip mechanism of the present invention is, for example, an automatic winding shown in FIG. You may provide in the transmission wheel 44 of the upper part 4. FIG. That is, if the kana 44b of the transmission wheel 44 is formed in a cylindrical shape to provide a slit, and a pressing piece portion having a spring property is provided between the slits, the pressing piece portion is brought into contact with the inner peripheral surface of the transmission gear 44a. Good. By doing so, slip occurs between the transmission gear 44a and the kana 44b, so that the mainspring 1 can be prevented from being excessively wound by the rotary weight 41, so that the slipping attachment 61 shown in FIG. 5 can be dispensed with.
[0055]
In addition, when a 24-hour indicator is provided in the timepiece, the slip mechanism of the present invention may be provided between the pinion to which the hour hand is attached and the number wheel rotating together with the pinion.
Furthermore, the number and shape of the slits and pressing pieces provided in the cylindrical portion are arbitrary, and these may be determined as appropriate in the implementation.
[0056]
In the timepiece of the embodiment, the train wheel is driven by the mechanical energy when the mainspring 1 is opened, the mechanical energy is converted into electric energy by the generator 2, and the rotation control means is operated by the electric energy to generate electric power. Although it was an electronically controlled mechanical timepiece that controls the value of the current flowing through the coil 25 of the machine 2 and accurately moves the hands fixed to the train wheel, the timepiece equipped with the slip mechanism of the present invention has a mainspring drive. Ordinary mechanical watches, so-called electronic (quartz) watches equipped with a crystal oscillator, step motor, and battery, and the generator is driven by the rotation of the rotating weight, and the step motor is driven by the generated electrical energy. An electronic timepiece with an automatic power generator may be used, and furthermore, various types of timepieces such as a wristwatch, a pocket watch, and a clock may be used.
[0057]
【The invention's effect】
As described above, according to the slip mechanism and the timepiece of the present invention, the pressing force of the slip mechanism is reliably maintained over a long period of time, so that, for example, overwinding of the mainspring or display error at the time of hand movement can be prevented. In addition to improving the reliability, there is an effect that the structure is less likely to be restricted by the size of the member.
[Brief description of the drawings]
FIG. 1 is a plan view showing an electronically controlled mechanical timepiece according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a main part of FIG.
3 is a cross-sectional view showing a main part of FIG.
4 is a cross-sectional view showing a main part of FIG. 1. FIG.
FIG. 5 is a plan view showing the mainspring in the embodiment.
FIG. 6 is a plan view showing a main part in the embodiment.
7 is an enlarged cross-sectional view showing a main part of FIG.
FIG. 8 is an overall perspective view showing the constituent members of the embodiment in an enlarged manner.
[Explanation of symbols]
7a Kana which is an outer member
13 Second wheel which is an inner member
82 Cylindrical part
83 slit
84 Press piece
85 protrusions

Claims (4)

An outer member that is rotatable or rotatable, and an inner member that is inserted into the outer member and rotatable coaxially;
Either one of the outer member and the inner member is provided with a cylindrical portion facing the peripheral surface of the other member,
This cylindrical part is provided with a slit and a pressing piece part sandwiched between the slits, and this pressing piece part is a slip mechanism that presses the peripheral surface of the other member ,
The slip mechanism characterized in that the tubular portion is provided on the outer member . 2. The slip mechanism according to claim 1, wherein a projecting portion protruding in a radial direction is provided on a pressing piece portion of the one member or a peripheral surface of the other member. A timepiece comprising the slip mechanism according to claim 1 . 4. The timepiece according to claim 3 , wherein the slip mechanism is provided in a time adjustment mechanism that corrects a time display.

Images