CN201698159U

CN201698159U - Constant-force device of watch

Info

Publication number: CN201698159U
Application number: CN201020216831XU
Authority: CN
Inventors: 徐雅冬; 张芳
Original assignee: Tianjin Seagull Watch Group Co Ltd
Current assignee: Tianjin Seagull Watch Group Co Ltd
Priority date: 2010-06-07
Filing date: 2010-06-07
Publication date: 2011-01-05
Anticipated expiration: 2020-06-07

Abstract

The utility model discloses a constant-force device of a watch, which comprises a constant dynamic force part and a swinging stopping part. The constant dynamic force part is meshed and connected with a swinging stopping medium gear shaft of the swinging stopping part through a driving wheel plate of the constant dynamic force part; and when the moment of a main spring of the swinging stopping part is smaller than that of a middle spring, the rotation of a positioning wheel plate of the constant dynamic force part is stopped to ensure that the watch is also stopped. The constant-force device has the benefits that as a swinging stopping device is added on the constant-force device, when a brake wheel is not controlled by a pallet jewel, , that is, the middle spring can not reach the upper limit of pretightening force, the watch can be stopped as early as possible, therefore, the number of pretightening turns of the middle spring is not changed when the watch is wound again, and a torque which is relatively constant and corresponds to the spring force of the middle spring can be transmitted to an escape wheel all the time. The constant-force device has the advantages of simple structure, reliable running, good manufacturability and more stable and reliable operation.

Description

The constant force device of wrist-watch

Technical field

The utility model relates to a kind of constant force device, and the power that particularly relates to a kind of wrist-watch driving wheel on barrel output evenly is delivered to the constant force device of the escapement speed adjusting gear of wrist-watch by this device.

Background technology

The constant force device of wrist-watch for send to one of escape wheel constant relatively, with the corresponding moment of torsion of elastic force of middle clockwork spring.Existing wrist-watch constant force device majority is an assembly that inserts in the transmission, the middle clockwork spring that it connects mainspring barrel and escape wheel and comprises a permanent load, the pretightning force of its medi-spring remain at a setting among a small circle in, its mean value remained unchanged in the whole working time.Therefore the variation of mainspring barrel state can not make the power that is applied on the escapement speed regulator change, so the vibration frequency of escapement speed regulator can be more stable; Constant force device can be temporary transient the gear of pinning upstream, clockwork spring can independently provide power for escape wheel in the middle of making, when the later pretightning force owing to middle clockwork spring of rotation certain hour is released to certain lower limit, constant force device will promote a rocking bar sustained release upstream gear by cam and rotate corresponding angle, with the clockwork spring pretightning force upper limit in the middle of reaching.

Patent publication No. is a plurality of examples that CH120028, CN100356279 and US2004156273 disclose the wrist-watch constant force device, the NE BY ENERGY TRANSFER of mainspring barrel arrives the tooth axle with a ratchet gearing, because the inner of middle clockwork spring is connected with this tooth axle and the prong of rocking bar is subjected to cam control to make the rocking bar periodic wobble, clockwork spring makeup energy in the middle of ratchet periodically is released to by rocking bar.The constant force device of said structure must guarantee that the fork of ratchet and rocking bar watt remains state of contact, when mainspring barrel moment can not reach the corresponding moment of the middle clockwork spring pretightning force upper limit, ratchet will no longer be waved the control of pike pole watt, but at this moment because middle clockwork spring can also provide energy for speed adjusting gear, so cam also is in the state when normally walking, ratchet and cam occurring can not periodic synchronous, when ratchet fall behind certain angle make ratchet that dedentition be arranged after to the rocking bar of jumping over after certain pitches watt, the pretension number of turns of clockwork spring reduces in the middle of will causing when wrist-watch is gone up bar again, the clockwork spring pretightning force can not reach the upper limit of setting promptly, and it is constant relatively to send one of escape wheel to when work, with the corresponding moment of torsion of the elastic force of middle clockwork spring.

Summary of the invention

Technical problem to be solved in the utility model is, overcomes the shortcoming of prior art, provide a kind of for escape wheel transmit constant relatively, with the wrist-watch constant force device of the corresponding moment of torsion of elastic force of middle clockwork spring.

The technical scheme that the utility model adopted is: a kind of constant force device of wrist-watch comprises perpetual motion power part and only puts part; Described perpetual motion power part is connected with a joggle with the described Jie's tooth axle of only putting that ends the pendulum part by driving wheel sheet wherein, and the described pendulum part of ending during less than the required moment of middle clockwork spring, stops the locating wheel sheet rotation of described perpetual motion power part at mainspring barrel, wrist-watch is ended put.

Described perpetual motion power partly comprises driving tooth axle, driving wheel sheet, the little tooth axle of constant force, interior stake, middle clockwork spring, stud, locating wheel sheet, cam, constant force tooth axle, lever, lever shaft, braked wheel and brake tooth axle; The described pendulum part of ending comprises, only put Jie's tooth axle, only put idle wheel, only put the tooth axle, end escapement; Described driving wheel sheet is coaxial fastening with the driving tooth axle, the little tooth axle engagement of described driving wheel sheet and constant force; The little tooth axle of described constant force sky is enclosed within on the constant force tooth axle; Stake is coaxial fastening with the little tooth axle of constant force in described; On the stake, its outer end was fixed on the described stud in clockwork spring the inner was fixed in the middle of described; Described stud is fixed on the locating wheel sheet; Described locating wheel sheet and cam, constant force tooth axle are coaxial fastening; Described lever is coaxial fastening with lever shaft, and described lever is respectively arranged with fork watt and lever bores, and described lever bores and cooperates with cam, and described fork watt cooperates with braked wheel; Described braked wheel is coaxial fastening with the brake tooth axle; Described brake tooth axle and the engagement of driving wheel sheet; Described driving wheel sheet with only put the engagement of Jie's tooth axle; Describedly only put the idle wheel sheet and only to put Jie's tooth axle coaxial fastening, describedly only put the idle wheel sheet and only put the engagement of tooth axle; Describedly end escapement and only to put the tooth axle coaxial fastening.

Described locating wheel sheet is d with the centre distance of ending escapement, and the external diameter of locating wheel sheet is R1, and the maximum outside diameter that ends escapement is R2, and minimum outer diameter is R3, wherein R1+R3＜d＜R1+R2.

The ratio of gear of described brake tooth axle and the little tooth axle of constant force is 1: 1, so middle clockwork spring screws and the angle that discharges is 60 °, described brake tooth axle is 1: 6 with the ratio of gear of only putting the tooth axle.

The beneficial effects of the utility model are: owing to increased a stop motion mechanism on constant force device, when braked wheel is not subjected to fork watt control, clockwork spring can not reach on the pretightning force and prescribe a time limit promptly, wrist-watch can stop as early as possible, the pretension number of turns of clockwork spring can not reduce in the middle of guaranteeing when wrist-watch is gone up bar again, thus guarantee to send to all the time one of escape wheel constant relatively, and the wrist-watch constant force device of the corresponding moment of torsion of elastic force of middle clockwork spring.This simple in structure, reliable, good manufacturability make the constant force device more stable work, and be reliable.

Description of drawings

Fig. 1 constant force device is the working position synoptic diagram in wrist-watch;

Fig. 2 perpetual motion power section axial launches synoptic diagram;

Fig. 3 only puts section axial and launches synoptic diagram;

Fig. 4 to Fig. 6 is a constant force device plane of movement synoptic diagram;

Constant force device floor map when Fig. 7 only puts;

Fig. 8 a to Fig. 8 k is that the not enough lever of mainspring barrel moment gets out the substep synoptic diagram that showed the tooth situation.

Among the figure

1: driving tooth axle 2: driving wheel sheet 3: the little tooth axle of constant force

4: interior stake 5: middle clockwork spring 6: stud

7: locating wheel sheet 8: cam 9: constant force tooth axle

10: lever 10a: fork watt 10b: lever bores

11: lever shaft 12: braked wheel 13: the brake tooth axle

14: only put Jie's tooth axle 15: only put idle wheel 16: only put the tooth axle

17: end escapement

Embodiment

Below, with embodiment the utility model is described in further detail in conjunction with the accompanying drawings:

As shown in Figure 1 to Figure 3, driving mechanism passes torque to the escapement speed adjusting gear by constant force device in the constant force device of the utility model wrist-watch, and guarantees that the moment of transmitting is constant, and the escapement speed adjusting gear can be operated steadily.Constant force device comprises that perpetual motion power partly and is only put part; The described perpetual motion power partly driving wheel sheet by wherein is connected with the described Jie's tooth axle of only putting that ends the pendulum part, and the described pendulum part of ending during less than the required moment of middle clockwork spring, stops the locating wheel sheet rotation of described perpetual motion power part at mainspring barrel, wrist-watch is ended put.Described perpetual motion power partly comprises driving tooth axle 1, driving wheel sheet 2, the little tooth axle 3 of constant force, interior stake 4, middle clockwork spring 5, stud 6, locating wheel sheet 7, cam 8, constant force tooth axle 9, lever 10, lever shaft 11, braked wheel 12 and brake tooth axle 13; The described pendulum part of ending comprises, only put Jie's tooth axle 14, only put idle wheel 15, only put tooth axle 16, end escapement 17; Described driving wheel sheet 2 is coaxial fastening with driving tooth axle 1, described driving wheel sheet 2 and little tooth axle 3 engagements of constant force; Little tooth axle 3 skies of described constant force are enclosed within on the constant force tooth axle 9; Stake 4 is coaxial fastening with the little tooth axle of constant force 3 in described; On the stake 4, its outer end was fixed on the described stud 6 in clockwork spring 5 the inners were fixed in the middle of described; Described stud 6 is fixed on the locating wheel sheet 7; Described locating wheel sheet 7 and cam 8, constant force tooth axle 9 are coaxial fastening; Described lever 10 is coaxial fastening with lever shaft 11, and described lever 10 is respectively arranged with fork watt 10a and lever bores 10b, and described lever bores 10b and cooperates with cam 8, and described fork watt 10a cooperates with braked wheel 12; Described braked wheel 12 is coaxial fastening with brake tooth axle 13; Described brake tooth axle 13 and 2 engagements of driving wheel sheet; Described driving wheel sheet 2 with only put 14 engagements of Jie's tooth axle; Describedly only put idle wheel sheet 15 and only to put Jie's tooth axle 14 coaxial fastening, describedly only put idle wheel sheet 15 and only put 16 engagements of tooth axle; Describedly end escapement 17 and only to put tooth axle 16 coaxial fastening.Described locating wheel sheet 7 is d with the centre distance of ending escapement 17, and the external diameter of locating wheel sheet 7 is R1, and the maximum outside diameter that ends escapement 17 is R2, and minimum outer diameter is R3, wherein R1+R3＜d＜R1+R2.

Below by embodiment operational process of the present utility model is illustrated: pretension one fixing turn when the middle clockwork spring 5 in the constant force device is started working, as shown in Figure 4, because fork watt 10a cooperates with braked wheel 12, make the moment of mainspring barrel can not be delivered to middle clockwork spring 5 again.Because clockwork spring 5 outer ends are fixed on the stud 6 in the middle of described, described stud 6 is fixed on the locating wheel sheet 7, and middle clockwork spring 5 drives 7 rotations of locating wheel sheet by stud 6.Lever on the locating wheel sheet 7 and cam 8, the 9 coaxial interlocks of constant force tooth axle, cam 8 and lever 10 bores 10b and cooperates, and cam 8 rotations promote levers 10 and rotate around lever shaft 11.Shown in Figure 5, braked wheel 12 is discharged (it is 60 ° that middle in the present embodiment clockwork spring 5 is released certain pretension angle) by fork watt 10a when rotating to this position.Driving wheel sheet 2 also just is released like this, the moment of mainspring barrel is delivered to the little tooth axle 3 of constant force through a series of transmission and by driving wheel sheet 2, little tooth axle 3 of constant force and interior stake 4 coaxial interlocks, clockwork spring 5 arrived position shown in Figure 6 in the middle of interior stake 4 was rotated rapidly and screwed, braked wheel 12 is by watt 10a stop of next fork, this moment, braked wheel 12 also rotated 60 °, the ratio of gear that ratio of gear through between gear calculates brake tooth axle 13 and the little tooth axle 3 of constant force is 1: 1, so the angle that screws of middle clockwork spring 5 also is 60 ° and equates the middle clockwork spring moment that discharges when just replenishing away with its d/d pretension angle.Because brake tooth axle 13 is 1: 6 with the ratio of gear of only putting tooth axle 16, end pendulum tooth axle 16 and rotate a circle so screw process at middle clockwork spring 5, so end escapement 17 with only put the 16 coaxial interlocks of tooth axle only escapement 17 also rotate a circle and get back to initial position.Middle clockwork spring 5 comes to provide comparatively constant moment for the escapement speed adjusting gear of wrist-watch through the process that discharges, screws like this.

In the middle of the not enough so that middle clockwork spring of the moment of mainspring barrel is tightened onto the initial pretightning force of clockwork spring promptly in the middle of clockwork spring 5 can not screw default 60 ° the time, at this moment braked wheel 12 also just can not rotate 60 ° cause braked wheel can not with the fork a watt 10a cooperate, shown in Fig. 8 a to 8k, suppose at this moment 60 ° of cam rotations and braked wheel 12 can only rotate 56 °, when middle clockwork spring 5 passed through the release in several cycles and is tightened onto Fig. 8 k, braked wheel had fallen behind one 60 ° on cam.At this time lever bores the tooth that 10b will let slip braked wheel 12, default pretightning force distance when clockwork spring can not reach wrist-watch dress table in the middle of when winding up to mainspring barrel again again, for fear of the generation of this situation, the utility model has added one and has ended swinging mechanism in traditional constant force device.In the middle of the not enough so that middle clockwork spring of the moment of mainspring barrel is tightened onto the initial pretightning force of clockwork spring promptly in the middle of clockwork spring end escapement can not screw default 60 ° the time and can not rotate a circle, but this moment is because middle clockwork spring can also provide moment for the escapement speed adjusting gear, so locating wheel also is in rotation status, when locating wheel rotate to shown in Figure 7 when only putting state because d＜R1+R2, locating wheel can not continue rotation owing to end escapement to stop, realize ending pendulum, make wrist-watch in mainspring barrel stopwatch in time during, in order to avoid the clockwork spring pretightning force does not reach default value in the middle of when winding up once more less than the required moment of middle clockwork spring.

It is worthy of note; protection domain of the present utility model is not limited to above-mentioned embodiment; according to basic fundamental design of the present utility model; also can be with essentially identical structure transmission; as being the middle clockwork spring angle that braked wheel is rotated when replenishing moment by changing mainspring barrel; perhaps change the little tooth axle of braking; the little tooth axle of constant force; the ratio of gear of only putting between tooth axle and other associated gear is realized the purpose of this utility model; as long as in addition by changing the shape of ending escapement and locating wheel sheet and satisfying the utility model and end the escapement maximum radius; least radius; locating wheel sheet radius reaches the relation of ending between escapement and the locating wheel sheet centre distance, also can realize the purpose of this utility model.As long as those of ordinary skills need not through creative work, the embodiment that can associate all belongs to protection domain of the present utility model.

Claims

1. the constant force device of a wrist-watch is characterized in that, comprises perpetual motion power part and only puts part; Described perpetual motion power part is connected with a joggle with the described Jie's tooth axle of only putting that ends the pendulum part by driving wheel sheet wherein, and the described pendulum part of ending during less than the required moment of middle clockwork spring, stops the locating wheel sheet rotation of described perpetual motion power part at mainspring barrel, wrist-watch is ended put.

2. the constant force device of wrist-watch according to claim 1, it is characterized in that described perpetual motion power partly comprises driving tooth axle (1), driving wheel sheet (2), the little tooth axle of constant force (3), interior stake (4), middle clockwork spring (5), stud (6), locating wheel sheet (7), cam (8), constant force tooth axle (9), lever (10), lever shaft (11), braked wheel (12) and brake tooth axle (13); The described pendulum part of ending comprises, only put Jie's tooth axle (14), only put idle wheel (15), only put tooth axle (16), end escapement (17); Described driving wheel sheet (2) is coaxial fastening with driving tooth axle (1), described driving wheel sheet (2) and the little tooth axle of constant force (3) engagement; The little tooth axle of described constant force (3) sky is enclosed within on the constant force tooth axle (9); Stake (4) is coaxial fastening with the little tooth axle of constant force (3) in described; Clockwork spring (5) the inner is fixed on the interior stake (4) in the middle of described, and its outer end is fixed on the described stud (6); Described stud (6) is fixed on the locating wheel sheet (7); Described locating wheel sheet (7) and cam (8), constant force tooth axle (9) are coaxial fastening; Described lever (10) is coaxial fastening with lever shaft (11), and described lever (10) is respectively arranged with fork watt (10a) and lever bores (10b), and described lever bores (10b) and cooperates with cam (8), and described fork watt (10a) cooperates with braked wheel (12); Described braked wheel (12) is coaxial fastening with brake tooth axle (13); Described brake tooth axle (13) and driving wheel sheet (2) engagement; Described driving wheel sheet (2) with only put Jie's tooth axle (14) engagement; Describedly only put idle wheel sheet (15) and only to put Jie's tooth axle (14) coaxial fastening, describedly only put idle wheel sheet (15) and only put tooth axle (16) engagement; Describedly end escapement (17) and only to put tooth axle (16) coaxial fastening.

3. the constant force device of wrist-watch according to claim 2 is characterized in that, described locating wheel sheet (7) is d with the centre distance of ending escapement (17), the external diameter of locating wheel sheet (7) is R1, the maximum outside diameter that ends escapement (17) is R2, and minimum outer diameter is R3, wherein R1+R3＜d＜R1+R2.

4. the constant force device of wrist-watch according to claim 2, it is characterized in that, described brake tooth axle (13) is 1: 1 with the ratio of gear of the little tooth axle of constant force (3), so middle clockwork spring (5) screws and the angle that discharges is 60 °, described brake tooth axle (13) is 1: 6 with the ratio of gear of only putting tooth axle (16).