CN201387543Y - Manual return-to-zero device of precision timer - Google Patents

Abstract

The utility model relates to a manual return-to-zero device of a precision timer, which effectively solves the problems of single function, large volume, poor reliability, low accuracy and no return-to-zero of the timer. Surface glass is arranged in front of a shell; a dial plate is arranged at the lower part of the surface glass; the shell is internally and vertically provided with a zeroing wheel shaft through an upper plywood, a middle plywood and a lower plywood; a zeroing wheel installed between the upper plywood and the middle plywood is arranged on the zeroing wheel shaft; the zeroing wheel is meshed with a zeroing third wheel; a third wheel blade installed under the zeroing third wheel is installed on a third wheel shaft; the third wheel blade is meshed with a second wheel blade installed on a second shaft which is provided with a second pointer; a step motor is arranged under the middle plywood; a lower gear and an upper gear are arranged on a step motor shaft; the third wheel blade is meshed with the upper gear on the motor shaft; the lower gear is meshed with a worm wheel blade on a worm shaft; a worm installed at the upper part of the worm wheel blade and meshed with a worm wheel is arranged on the worm shaft; and the rear part of the worm wheel is provided with a counting wheel. The manual return-to-zero device of the precision timer has the advantages of small size, high reliability and high precision, and is a major innovation for the timer.

Description

The manual clearing device of timer

One, technical field

The utility model relates to timer, the manual clearing device of particularly a kind of timer.

Two, background technology

Timer is an instrument commonly used in industry and the war production, but present home products function singleness, possesses the second of counting simultaneously, score, timing, not not finding as yet of the function that " makes zero ", abroad, the timer volume ratio D-704-3HC based on stepper motor that Japan produces is big slightly, diameter 52mm, degree 50mm, but function only possess the record hour, can show 100,000 hours, not possess second functions such as showing and makes zero, volume is little and adopt the number wheel to show and the timer of band second clocking capability, home products has thickness 35mm, the timing product of the about 25mm of diameter show or liquid crystal display product but mostly be digital, and LED or LCD shows, in vibration test, be prone to short word, disconnected word phenomenon, reliability is not as counter wheel timing structure, and the home products accuracy of timekeeping mostly is greatly≤and ± 1/100, so imperative to the improvement that has timer now.

Three, utility model content

At above-mentioned situation, for overcoming the prior art defective, the purpose of the utility model just provides the manual clearing device of a kind of timer, can effectively solve the timer function singleness, volume is big, poor reliability, low and the problem that can not make zero of precision, the technical scheme of its solution is, comprise dial plate and housing, the watch crystal that is contained in the housing front through O-ring seal is arranged in the housing, dial plate in trim ring is contained in housing is arranged at the watch crystal bottom, the dial plate below has the train wheel bridge that is contained in the housing successively, middle clamp plate, lower plate, housing is interior through train wheel bridge, middle clamp plate, lower plate vertically is equipped with the zeroing wheel shaft, outside is stretched out in zeroing wheel shaft upper end, be contained in train wheel bridge on the zeroing wheel shaft, zeroing wheel between middle clamp plate, zeroing wheel and the zeroing third wheel that was contained on the wheel shaft are meshed, cross the setting pinion that is contained in zeroing third wheel below is arranged on the wheel shaft, setting pinion and the second wheel sheet that is contained on second axle are meshed, second, there was the second hand that stretches out outside the dial plate axle upper end, stepper motor is equipped with in the middle clamp plate below in housing, the arbor of stepper motor stretches out and the stepper motor lower gear is housed above the middle clamp plate and cogs, cogging on the arbor of setting pinion and stepper motor is meshed, worm screw wheel sheet on stepper motor lower gear and the worm shaft is meshed, have on the worm shaft to be contained in the worm screw that worm screw wheel sheet top and worm gear are meshed, there is counter wheel at the worm gear rear portion.The utility model volume is little, reliability is high, and the precision height is that one on the timer innovated greatly.

Four, description of drawings

Accompanying drawing is a section of structure of the present utility model.

Five, embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.

Provide by accompanying drawing, the utility model comprises dial plate 23 and housing 24, the watch crystal 3 that is contained in the housing front through O-ring seal 25 is arranged in the housing, the watch crystal bottom has through trim ring 22 and is contained in dial plate 23 in the housing, the dial plate below has the train wheel bridge 21 that is contained in the housing successively, middle clamp plate 17, lower plate 16, housing is interior through train wheel bridge 21, middle clamp plate 17, lower plate 16 vertically is equipped with zeroing wheel shaft 2, outside is stretched out in zeroing wheel shaft 2 upper ends, be contained in train wheel bridge 21 on the zeroing wheel shaft 2, the zeroing wheel 20 that middle clamp plate is 17, zeroing wheel 20 and the zeroing third wheel 6 that was contained on the wheel shaft 7 are meshed, cross the setting pinion 14 that is contained in zeroing third wheel 6 belows is arranged on the wheel shaft 7, setting pinion 14 and the second wheel sheet 19 that is contained on second axle 5 are meshed, second, there was the second hand 4 that stretches out outside the dial plate axle upper end, stepper motor 28 is equipped with in middle clamp plate 17 belows in housing, the arbor 26 of stepper motor stretches out and stepper motor lower gear 27 is housed above the middle clamp plate 17 and cogs 13, cogging on the arbor 26 of setting pinion 14 and stepper motor 13 is meshed, worm screw wheel sheet 12 on stepper motor lower gear 27 and the worm shaft 9 is meshed, have on the worm shaft 9 to be contained in the worm screw 8 that worm screw wheel sheet 12 tops and worm gear 10 are meshed, there is counter wheel 11 at the worm gear rear portion.

In order to guarantee result of use, said housing is the up big and down small right cylinder that employing has the stainless steel case of metallic luster to make; Said zeroing wheel shaft 2, second axle 5, cross wheel shaft 7, the arbor 26 of stepper motor, worm shaft 9 is parallel mutually is contained in the housing; Said zeroing wheel shaft 2 upper ends have zeroing to dial handle 1; In order to guarantee result of use, have between middle clamp plate 17 and lower plate 16 on the said zeroing wheel shaft 2 locating sleeve 18 is housed, be connected together through threaded together 15 by locating sleeve 18 top bodies between zeroing wheel shaft 2 and the middle clamp plate 17, hand is rotated counterclockwise zeroing and dials handle, drive in the threaded together of zeroing wheel shaft from locating sleeve and back-out, and axially directed by train wheel bridge and locating sleeve, to guarantee zeroing wheel shaft 2 and to cross wheel shaft 7 axially parallels; Be black matrix wrongly written or mispronounced character, white second hand on the said dial plate, the number wheel divides meter to adopt white background The Scarlet Letter, the time meter adopt the black matrix wrongly written or mispronounced character, the time score meter all adopt big number wheel to show; For ease of engagement, said zeroing wheel and zeroing third wheel all fall gear 15 degree angles; Said zeroing wheel, second wheel sheet, zeroing third wheel, setting pinion, cog, stepper motor lower gear, worm screw wheel sheet all adopt the watch gear profile of tooth, this profile of tooth great advantage is that into tooth angle is little, stable drive, flexibly, friction factor is little, the transmission efficiency height.

Principle of work of the present utility model is, be rotated counterclockwise zeroing with hand and dial handle, drive in the threaded together of zeroing wheel shaft from locating sleeve and back-out, and by train wheel bridge and positioning sleeving shaft after deriving, with the zeroing axle of handing up, can clockwise or be rotated counterclockwise zeroing after the zeroing wheel meshes with the zeroing third wheel and dial handle, zeroing is dialled handle and is driven the zeroing wheel, the zeroing wheel drives the zeroing third wheel by engagement, the zeroing third wheel drives setting pinion, setting pinion drives the rotation of second wheel sheet by engagement, and the second wheel sheet drives second hand by a second axle, reaches the manual purpose that makes zero second of transferring.In addition, setting pinion drives stepper motor by engagement and cogs, and the stepper motor lower gear drives the worm and wheel engagement with the engagement of worm screw wheel sheet by worm shaft again, and the worm gear drives counter wheel reaches the purpose of zeroing.

After tested, technical indicator of the present utility model is as follows:

1, physical dimension Φ 55mm, thickness≤61mm;

2, timing range accumulative total is 10 hours, can be recycled after the full journey of counting, has the mechanism of making zero manual second;

3, have second the clocking capability that level shows, counter wheel has ten hours, the Presentation Function of individual position hour, minute, second;

4, accumulative total timing error ≯ 2 ‰ under 25 ° ± 5 ℃ conditions of environment temperature;

5, environment temperature-40 ° ∽+55 ℃;

6, supply voltage 28.5V ± 3VDC, overload impact voltage≤50VDC;

7, time between failures 〉=1000 hour;

8, vibration resistance should be able to be born 5Hz ∽ 500Hz, acceleration 1.5g ∽ 4.2g autoscan vibration test.

In sum, the utility model volume is little, have meter second, score, timing, accumulative total, manually second to make zero multi-functional be one, and reliability height, adverse environment resistant, high voltage withstanding impact, and economic and social benefit is huge.

Claims (7)

1, the manual clearing device of a kind of timer, comprise dial plate (23) and housing (24), it is characterized in that, the watch crystal (3) that is contained in the housing front through O-ring seal (25) is arranged in the housing, the watch crystal bottom has through trim ring (22) and is contained in dial plate (23) in the housing, the dial plate below has the train wheel bridge (21) that is contained in the housing successively, middle clamp plate (17), lower plate (16), housing is interior through train wheel bridge (21), middle clamp plate (17), lower plate (16) vertically is equipped with zeroing wheel shaft (2), outside is stretched out in zeroing wheel shaft (2) upper end, be contained in train wheel bridge (21) on the zeroing wheel shaft (2), zeroing wheel (20) between middle clamp plate (17), zeroing wheel (20) and the zeroing third wheel (6) that was contained on the wheel shaft (7) are meshed, cross the setting pinion (14) that is contained in zeroing third wheel (6) below is arranged on the wheel shaft (7), setting pinion (14) and the second wheel sheet (19) that is contained on second axle (5) are meshed, second, there was the second hand (4) that stretches out outside the dial plate axle upper end, stepper motor (28) is equipped with in middle clamp plate (17) below in housing, the arbor of stepper motor (26) stretches out stepper motor lower gear (27) and cog (13) is housed above the middle clamp plate (17), cog (13) on the arbor (26) of setting pinion (14) and stepper motor are meshed, worm screw wheel sheet (12) on stepper motor lower gear (27) and the worm shaft (9) is meshed, have on the worm shaft (9) to be contained in the worm screw (8) that worm screw wheel sheet (12) top and worm gear (10) are meshed, there is counter wheel (11) at the worm gear rear portion.

2, the manual clearing device of timer according to claim 1 is characterized in that, said housing is the up big and down small right cylinder that has the stainless steel case of metallic luster to make.

3, the manual clearing device of timer according to claim 1 is characterized in that, said zeroing wheel shaft (2), second axle (5), cross wheel shaft (7), stepper motor arbor (26), worm shaft (9) is parallel mutually is contained in the housing.

4, the manual clearing device of timer according to claim 1 is characterized in that, said zeroing wheel shaft (2) upper end has zeroing to dial handle (1).

5, the manual clearing device of timer according to claim 1, it is characterized in that, have on the said zeroing wheel shaft (2) between middle clamp plate (17) and lower plate (16) locating sleeve (18) is housed, be connected together through threaded together (15) by locating sleeve (18) top body between zeroing wheel shaft (2) and the middle clamp plate (17).

6, the manual clearing device of timer according to claim 1 is characterized in that, said zeroing wheel and zeroing third wheel all are 15 degree angles of gear.

7, the manual clearing device of timer according to claim 1 is characterized in that, said zeroing wheel, second wheel sheet, zeroing third wheel, setting pinion, cog, stepper motor lower gear, worm screw wheel sheet all be watch gear profiles of tooth.

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