CN2269596Y - Separable sleeve of quartz clock hands - Google Patents

Abstract

The utility model relates to a separable sleeve of quartz clock hands, which is driven to operate by the power generated by a step mechanism, comprising a hand gear in sleeve joint with a hand tube. An inner wall cuts through the center of the hand gear. The top end of the hand tube is provided with a bearing part for being sheathed with the hand gear correspondingly. At least two elastic bunt pieces abutting and corresponding to the inner wall of the hand gear are extended on the bearing part. The top end of each elastic bunt piece is convexly provided with a hook preventing the hand gear from slipping. The elastic bunt piece is against the inner wall of the hand gear. The state of tight fit of sheathing can achieve a moderate looseness, and the hand cover has the effects of enlarging tolerance range of manufacturing accuracy, simplifying assembly program and reducing cost.

Description

The branch needle guard of crystal clock

The utility model relates to a kind of crystal clock, particularly a kind of branch needle guard of crystal clock.

As shown in Figure 1, crystal clock in the past is by the changes of magnetic field that is produced between the made electron plate of quartz oscillation crystal and IC element by a stepping mechanism 10 and one, make the rotor 100 of this stepping mechanism 10 do regular rotation, give a second hand toothholder 11 via the under drive gear group with transmission of power by this rotor 100 again, a branch needle guard 2, a hour hands toothholder 12, thereby make second hand, minute hand, hour hands rotate according to the speed of predetermined ratio, this rotor 100 is first gears 13 that are meshed with this second hand toothholder 11 by, power is passed to second hand toothholder 11 indirectly, and this second hand toothholder 11 is rotated, this second hand toothholder 11 makes transmission of power to this minute needle guard 2 by one second gear 14, and this minute needle guard 2 is rotated, again by one with different number of teeth ratios respectively with this minute needle guard 2 and the 3rd gear 15 of hour hands toothholder 12 engagement, with this minute needle guard 2 rotational power pass to hour hands toothholder 12, and this hour hands toothholder 12 is rotated, in order to reach the effect of adjusting time error, also establishing one in addition can be for the adjustment button 16 of staff rotation, these adjustment button 16 belows are coaxial to be provided with an adjustment gear 160 with 15 engagements of the 3rd gear, when needing to adjust time error, but user's turn should be adjusted button 16, make this adjustment gear 160 drive the 3rd gear 15 toward being opposite direction rotation with this adjustment gear 160, again by the 3rd gear 15 respectively and this minute needle guard 2 and hour hands toothholder 12 between drive connection, make simultaneously this minute needle guard 2 with hour hands toothholder 12 respectively toward the direction quick rotation of required adjustment, and reach the purpose that is adjusted to correct time.Above-mentioned gear train is identical with general gear train, so no longer describe in detail.

Under the state of electric power starting, this rotor 100 is to advance toward same direction with a stable rotating speed to rotate, and via reducing gear with transmission of power to the 3rd gear 15.When the user adjusted the time, the power source pressure of dialling the action button of self-adjusting in the future 16 by the 3rd gear 15 that changes this adjustment button 16 was applied to this whole transmission gear and fastens.Normal power source is concerning this rotor 100, the power that this adjustment button 16 is applied is reverse and huge, so, for fear of when adjusting, destroying normal transfer gear train, the branch needle guard of general crystal clock inside all be " Two Piece Set is box-like " member it the structure of a relatively turnable fit is provided, to avoid that this adjustment button 16 power-forced passed under drive gear system.And divide the fit between needle guard 2 members to have a suitable fit elasticity, so that divide needle guard 2 under normal running, can provide a suitable close-fitting degree, to transmit normal propelling power under drive gear system, when when stirring adjustment button 16, can be by the loose fit of appropriateness between minute needle guard 2 members, reach simultaneously and adjust time error and do not destroy drive mechanism between transfer gear train.

As Fig. 1, it shown in 2 the box-like branch needle guard 2 of Two Piece Set in the past, this minute, needle guard 2 comprised a minute hand tooth 20 and a minute hand pipe 21, minute hand tooth 20 be one by the made fluted disc of metal, central authorities are provided with a perforation 200, these minute hand pipe 21 tops are provided with a lean against part 210, below this lean against part 210, be provided with a conversion gear 211 coaxially, minute hand tooth 20 can be nested with accordingly between lean against part 210 bottom surfaces and conversion gear 211 tops, and metal clips 22 corresponding clips of mat are located between minute hand tooth 20 and the conversion gear 211, making can be by metal clips 22 axial elastic force up between minute hand tooth 20 and the lean against part 210, and flexibly be tight against and have suitable friction force, minute hand tooth 20, conversion gear 211 is meshed with the in-line gears 141 and the 3rd gear 15 of one second gear 14 respectively, by this minute needle guard 2 minute hand tooth 20 and minute hand pipe 21 can be relatively rotated, so that when adjusting time error, make branch needle guard 2 when bearing the next rotational power of the 3rd gear 15 transmission and passing to conversion gear 211, second gear 14 gives the reverse resistance of minute hand pipe 21, minute hand tooth 20 is rotated with respect to minute hand pipe 21, and make the rotational power of the 3rd gear 15 can not destroy second gear 14 and second hand toothholder 11, first gear 13, unitized constructions such as rotor 100.The branch needle guard 2 of above-mentioned prior art is to utilize the axial elastic force of this metal clips 22 to compress, and makes the enough radial frictional forces of generation between minute hand pipe 21 and the minute hand tooth 20, so that the degree of tightness effect that an appropriateness is arranged between this minute hand pipe 21 and the minute hand tooth 20 to be provided.But the cost of metal is higher, and the assembling of this metal clips 22 must be with manually-operated, can't utilize machinery to reach robotization processing fully, thereby makes branch needle guard 2 assembling complexity and cost height.

As shown in Figure 3, existing another can avoid assembling complexity and the high shortcoming of material cost by the branch needle guard 3 of plastic cement material moulding, dividing needle guard 3 is to be socket-connected by a minute hand tooth 30 and a minute hand pipe 31 to form, these minute hand tooth 30 central authorities are provided with a triangle hole 300 with predetermined caliber size, three limits of this hole 300 are to be laminar sheet limit 301, and the corner on each limit forms one can provide this sheet limit 301 flexible circular arc re-entrant angles 302, again minute hand pipe 31 apical margins form one can corresponding bearing minute hand tooth 30 top brace part 310, be convexly equipped with a projection 311 that can be nested with on the top brace part 310 for the endoporus 300 of minute hand tooth 30, forming a high degree of tightness of precision between the outside anchor ring of this projection 311 and this sheet limit 301 cooperates, below this top brace part 310, be provided with a conversion gear 312 in addition coaxially, when assembling divides needle guard 3, minute hand tooth 30 is nested with on the top brace part 310 of minute hand pipe 31, make minute hand tooth 30 pass this projection 311 by endoporus 300, right Hou is placed on the top brace part 310 of minute hand pipe 31, and engage with precision between the three sheet limits 301 by projection 311 outside anchor rings, make suitable elasticity state of formation between this minute hand tooth 30 and the minute hand pipe 31.

The branch needle guard 3 of this prior art is in the past mixed at the integral installation of crystal clock, though can reach automatic operation, but because engaging between minute hand tooth 30 and the minute hand pipe 31 is to lean on the radial frictional force that is produced between the sheet limit 301 of projection 311 and endoporus 300, the clamping elastic force direction that sheet limit 301 provided is axial (parallel with rubbing surface), therefore there are not enough elastic ranges, so must rely on the precision-fit of size between the projection 311 of endoporus 300 and top brace part 310 fully, just can make the Two Piece Set of branch needle guard 3 close the degree of tightness effect that reaches suitable, on making, the external diameter of projection 311 is little if the internal diameter of the endoporus 300 that this sheet limit 301 constitutes is big, can make the too pine that cooperates between minute hand tooth 30 and the minute hand pipe 31, if and sheet limit 301 internal diameters are little and external diameter projection 311 is big, can cause again between minute hand tooth 30 and the minute hand pipe 31 engage too tight, so this minute, needle guard 3 was higher in precision requirement, therefore cause cost of manufacture to improve.

Fundamental purpose of the present utility model provides a kind of branch needle guard that can reach the crystal clock of good degree of tightness effect, and needle guard can make the error permissible range of fit precision increase and the cost reduction in described minute.

Needle guard comprised a minute hand pipe and a minute hand tooth that is nested with accordingly on described minute hand pipe in of the present utility model minute, rotated according to certain gear ratio by a stepping mechanism transmission that is assembled in the crystal clock; Be characterized in: this minute hand tooth central authorities connect and have an inwall, the minute hand pipe top is provided with one can be for the corresponding sheathed placing part of minute hand tooth, this placing part epirelief is stretched out at least two and is had one section and protrude out length and can support sheet for the corresponding elasticity that be tight against minute hand tooth inwall, the minute hand tooth is nested with on this placing part, each elasticity has one to the sheet top and outwards is convexly equipped with the grab that prevents the slippage of minute hand tooth, support sheet by elasticity and support mutually, make the fit elasticity that can reach appropriateness between minute hand tooth and the minute hand pipe with the inwall of minute hand tooth.

Support radial elastic gripping power between sheet and the inwall minute hand is enclosed within rotate the time by elasticity, can form suitable elasticity between minute hand tooth and the minute hand pipe, and, elasticity has radially butted displacement because supporting sheet, the requirement of the fit precision of feasible processing not only has bigger error permissible range, and in the allowable error fashionable suitable fit elasticity that still has of trapping, and realize easily that in the processing assembling robotization is to reduce cost.

Also further specify the purpose of this utility model and characteristics in conjunction with the accompanying drawings below by most preferred embodiment; In these accompanying drawings:

Fig. 1 is that the minute hand cover of prior art is installed in the three-dimensional exploded view in the crystal clock.

Fig. 2 Fig. 1 divides the handstand of needle guard to amplify assembly drawing.

Fig. 3 is the amplification three-dimensional exploded view of the branch needle guard of another kind of prior art.

Fig. 4 is that the quartzy minute hand cover of the utility model one preferred embodiment is installed in the three-dimensional exploded view in the crystal clock.

Fig. 5 is the three-dimensional exploded view that the quartz of Fig. 4 preferred embodiment divides needle guard.

Fig. 6 is the assembling view that the quartz of Fig. 4 preferred embodiment divides needle guard.

As shown in Figure 4, most member of the crystal clock that cooperates with the utility model one preferred embodiment is identical with crystal clock in the past, it also is the changes of magnetic field that produces between the electron plate that utilizes a stepping mechanism 40 and to make by quartz oscillation crystal and IC element, produce a power source, and power source is sent out in the mode of rotating by the rotor 400 of this stepping mechanism 40, this rotor 400 is meshed with one first gear 43, second hand toothholder 41 is rotated, this second hand toothholder 41 is by one second gear 44, branch needle guard 5 is rotated, this minute, needle guard 5 made 42 runnings of hour hands toothholder by one the 3rd gear 45 again, the 3rd gear 45 simultaneously with adjust button 46 and adjust gears 460 and be meshed.

As Fig. 4, shown in 5, this minute, needle guard 5 was to be made by plastic cement material, comprise a minute hand tooth 50 and a minute hand pipe 51, this minute hand tooth 50 and minute hand pipe 51 mutual sockets, this minute hand tooth 50 is ring plate gears that an outer shroud has the gear teeth, central authorities are provided with a perforation 500, the peritreme of this perforation 500 extends upward a required height to form an internal ring wall 501 with predetermined altitude, this minute hand pipe 51 has the pipe portion 510 of running through an inside, in this pipe portion 510, the outside respectively with second hand toothholder 41 and the 42 corresponding nested cooperations of hour hands toothholder, be positioned at pipe portion 510 top periphery rings establish one can be for the corresponding sheathed placing part 511 of minute hand tooth 50, be close to placing part 511 belows and axially be provided with a conversion gear 512 with the 45 corresponding engagements of the 3rd gear, but stretch out four and have the elasticity that suitable height and elasticity is tight against minute hand tooth 50 inwalls 501 and support sheet 513 in that placing part 511 end faces are convex, prevent that this minute hand tooth 50 from skidding off the grab 514 outside the minute hand pipe 51 and outwards be convexly equipped with one to sheet 513 tops in each elasticity, these grab 514 apical margins form an inclination conical surface, can be sheathed smoothly for minute hand tooth 50, support sheet 513 by this elasticity and support, make between minute hand tooth 50 and the minute hand pipe 51 to reach suitable elasticity with cooperating of inwall 501.

Cooperate shown in Figure 6, this minute, needle guard 5 pawl outwardly that supports the flexible of sheet 513 by elasticity and overlapped fashionable storage pushed away the elasticity potential energy, promptly support the radical elasticity displacement that sheet 513 is had by this elasticity, the relation of supporting that makes this elasticity support between sheet 513 and the inwall 501 has a wider elastic range, when minute needle guard 5 rotates, relatively rotating between this minute hand tooth 50 and the minute hand pipe 51 can both have suitable degree of tightness, if make perforation 500 apertures of minute hand tooth 50 slightly little or big slightly, each elasticity is supported sheet 513 can both properly push against this 500 inwalls 501 of boring a hole, and can not make cooperating too tightly or pine too between minute hand tooth 50 and the minute hand pipe 51, so needle guard 5 was under the normal running of crystal clock in of the present utility model minute, utilize suitable wringing fit between minute hand tooth 50 and the minute hand pipe 51, make when second gear 44 is given minute hand tooth 50 with transmission of power, minute hand tooth 50 drives this minute hand pipe 51 one running in the lump, when stirring this adjustment button 46, by suitable loose fit between minute hand tooth 50 and the minute hand pipe 51, reach the normal operation of adjusting time error and not influencing crystal clock simultaneously, the making precision allowable error of dividing needle guard 5, not only can add on a large scale, thereby the reduction cost of manufacture, but and in the assembling of integral body full automation.

In sum, the branch needle guard of crystal clock of the present utility model can provide good degree of tightness effect, and has easy to assembly and increase the trueness error permissible range and the low effect of cost.

Claims (2)

1. a crystal clock divides needle guard, and it comprises a minute hand pipe and correspondence and is nested with minute hand tooth on this minute hand pipe, it is characterized in that:

There is a ring inwall in these minute hand tooth central authorities, this minute hand pipe top be provided with one with the corresponding sheathed placing part of this minute hand tooth, this placing part epirelief is stretched out at least two elasticity that can corresponding be tight against this minute hand tooth inwall and is supported sheet, each elasticity is supported the sheet top and is outwards convexed with a grab that prevents this minute hand tooth slippage, and this elasticity is supported sheet and supported mutually with the inwall of minute hand tooth.

2. crystal clock as claimed in claim 1 divides needle guard, it is characterized in that: this elasticity is supported sheet four.

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