CN2439081Y - Position limiting mechanism for birds tuning device - Google Patents

Abstract

The utility model relates to a position-limit mechanism for bird tuning devices. The utility model is designed according to 'staggered tooth' principles, and limits the force range of a wind spring in order to control force magnitude. A wind-spring shaft of a bird tuning device is provided with a position-limit gear Z1. A base is connected with a position-limit gear Z2 which is wedged with the position-limit gear Z1. The two gears must conform to Z2=Z1+n (n=1, 2, 3, etc., and n< Z1). The gear Z1 must be provided with one long tooth, and the tooth-top radius of the long tooth is larger than the tooth-top radiuses of other teeth. The tooth-root radius of at least one tooth of the gear Z2 is smaller than the root radiuses of other teeth. The utility model controls the force range of the wind spring. The bird tuning device has the advantages that the bird tuning device has uniform and pure sound, and is free from the noise interference of transmission components. The utility model can be used for bird tuning devices, music boxes, mechanical timepieces, etc.

Description

The birds singing buzzer position-limit mechanism

The utility model relates to the position-limit mechanism of mechanical type birds singing buzzer.

As the birds singing buzzer of toy, handicraft, the mechanical type chirping of birds device of a kind of mockingbird song sound that to be a kind of clockwork spring that utilizes mechanical principle design for power and gas shock sounding principle, because its imitation sound image and true to nature, so favored by people." the mechanical type chirping of birds device " of the patent No. 96245695.0 is exactly a kind of fairly perfect appreciation product that liked by people that design.However, also there is some defective in mechanical type chirping of birds device, for example in operational process, when on the clockwork spring when the tightest because clockwork spring moment is too big, and the resistance of anti-coagulating action structure is limited, then the speed of birds singing buzzer can be too fast.And when its clockwork spring moment has discharged soon when forwarding last lap to (generally be winder), because spring force is too little, can make birds singing buzzer speed too slow again, and make the drive disk assembly intermitten service, can send the collision noise of drive disk assembly, disturbing the homogeneity and the purity of the sounding of birds singing buzzer, is the blemish in an otherwise perfect thing of birds singing buzzer complete machine in fact.

The purpose of this utility model all provides a kind of suitable centre position that having an effect of clockwork spring can be limited in the defective that overcomes prior art, not making to get on the clockwork spring too tightly has an effect too big, be unlikely again and have an effect too for a short time at last, birds singing buzzer sounding speed is even, the birds singing buzzer position-limit mechanism of noiseless noise thereby make.

According to above-mentioned purpose, embodiment of the present utility model is: the birds singing buzzer position-limit mechanism, in the chamber of birds singing buzzer going barrel and base composition, be provided with clockwork spring and the non-return mechanism that is wound on the winder, it is characterized in that described winder overhanging end is provided with the position limited gear Z that is in transmission connection with it ₁, with position limited gear Z ₁That agrees with is connected position limited gear Z on the base ₂, Z ₁And Z ₂Being construed as limiting the have an effect condition of scope of clockwork spring is: Z ₂=Z ₁+ n (n=1,2,3 ..., and n＜Z ₁); Gear Z ₁A long tooth must be arranged, and the tooth top radius of long tooth is greater than the tooth top radius of other tooth; Gear Z ₂Have the root radius of the root radius of a tooth at least less than other tooth.

Design of the present utility model is to adopt " side set principle " to design a pair of position limited gear, be stuck when making the rotation of winder be subjected to a pair of position limited gear to forward a certain circle to and stop operating, can reach the have an effect purpose of scope of restriction clockwork spring, so it is even and pure to have the sounding that makes birds singing buzzer, be not subjected to the advantage of the noise interference of drive disk assembly, the quality scale of birds singing buzzer is improved, and can be widely used in birds singing buzzer, musical box, mechanical clock etc. has even sounding requirement, needs in the product of control moment.

Description of drawings.

Fig. 1 is the utility model base profile structural representation.

Fig. 2 is the A-A cut-open view of Fig. 1.

Fig. 3 is a pair of position limited gear plane structure chart.

Embodiment to the utility model is described in detail again below with reference to above-mentioned accompanying drawing.

Birds singing buzzer position-limit mechanism (referring to Fig. 1-3), be provided with clockwork spring (6) and the non-return mechanism (7) that is wound on the winder (2) in the chamber that going barrel (5) that birds singing buzzer fixes and base (4) are formed, the winder overhanging end is provided with the position limited gear Z that department flat with it is in transmission connection ₁(1), with position limited gear Z ₁The collar (8) that passes through that agrees with is connected position limited gear Z on the base ₂(3), Z ₁And Z ₂Being construed as limiting the have an effect condition of scope of clockwork spring is: Z ₂=Z ₁+ n (n=1,2,3 ..., and n＜Z ₁); Gear Z ₁A long tooth must be arranged, and the tooth top radius of long tooth is greater than the tooth top radius of other tooth; Gear Z ₂Have the root radius of the root radius of a tooth at least less than other tooth.

Gear mesh of the present utility model adopts " side set principle " design, i.e. gear Z ₁The number of teeth be n tooth, then gear Z ₂The number of teeth be n+1 tooth.Like this as gear Z ₁When rotating a circle, gear Z ₂Just forward the position that a circle differs from a tooth to.

Figure 3 shows that example, establish gear Z ₁=9, tooth number is respectively a ₁, a ₂, a ₃A ₉, according to gear Z ₁It is long tooth that a tooth must be arranged, and the tooth top radius of long tooth is greater than the principle of the tooth top radius of other tooth: a wherein ₁Tooth is long tooth, a ₁The tooth top radius of tooth is r ₁, all the other tooth a ₂, a ₃A ₉The tooth top radius be r ₀, r ₁＞r ₀When getting n=1, gear Z then ₂=Z ₁+ 1=10, tooth root portion position is respectively b ₁, b ₂, b ₃B ₁₀, according to the principle of the root radius that has a tooth at least less than the root radius of other tooth, present embodiment adopts the root radius of the root radius of 4 teeth less than other tooth, i.e. b ₁, b ₂, b ₃, b ₄Root radius be R ₁, all the other b ₅, b ₆B ₁₀Root radius be R ₀, R ₁＜R ₀So design satisfies condition.If gear Z ₁With gear Z ₂Centre distance be L ₀, so:

r ₁＞r ₀

R ₁＜R ₀

r ₁+R ₁≤L ₀

r ₁+R ₀＞L ₀

R ₀＋r ₀≤L ₀

As gear Z ₁When rotating counterclockwise, first lap a ₁With gear Z ₂B ₁Agree with the second circle a ₁With b ₂Agree with ..., when going to the 5th circle, because r ₁+ R ₀＞L ₀, two gears will be stuck, can not transmission.Otherwise, as gear z ₁When clockwise rotating, situation too.It is can only be in five circles clockwise or rotate counterclockwise so just to limit winder.

In the practical operation, the last lap that will discharge with clockwork spring can reach spacing effect as the reference position of winding up.For different clockwork springs, can design different z ₁And z ₂, and different R ₁, R ₀, r ₁, r ₀And L ₀Cooperation, can both reach the have an effect purpose of scope of needed restriction clockwork spring.

Claims (1)

1. birds singing buzzer position-limit mechanism, in the chamber of birds singing buzzer going barrel (5) and base (4) composition, be provided with clockwork spring (6) and the non-return mechanism (7) that is wound on the winder (2), it is characterized in that described winder (2) overhanging end is provided with the position limited gear Z that is in transmission connection with it ₁(1), with position limited gear Z ₁That agrees with is connected position limited gear Z on the base (4) ₂(3), Z ₁And Z ₂Being construed as limiting the have an effect condition of scope of clockwork spring is:

Z ₂=Z ₁+ n (n=1,2,3 ..., and n＜Z ₁);

Gear Z ₁A long tooth must be arranged, and the tooth top radius of long tooth is greater than the tooth top radius of other tooth;

Gear Z ₂Have the root radius of the root radius of a tooth at least less than other tooth.

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