CN209149084U - A kind of non-return pawl - Google Patents

Abstract

The utility model discloses a kind of non-return pawls, are related to wrist-watch systems technology field, and the non-return pawl includes ontology, and the ontology is equipped with mounting hole；First claw is set to the side of the ontology；Second claw is set to the side of the ontology, and is located at the side of first claw far from the mounting hole；First claw is engaged with non-return ratchet, and when the first claw engages failure with non-return ratchet, second claw is engaged with non-return ratchet, forms non-return effect.In the utility model, devise two claws, one of holding is engaged with non-return ratchet, prevent the counter-rotating of non-return ratchet, the effect of another its candidate, when the first claw and non-return ratchet are after engaging failure, the design of the second claw can substitute engaging for the realization of the first claw and non-return ratchet, the reverse of non-return ratchet is prevented, so as to guarantee non-return effect.

Description

A kind of non-return pawl

Technical field

The utility model relates to wrist-watch systems technology field more particularly to a kind of non-return pawls.

Background technique

When wrist-watch will be winded up work automatically, because wristwatch automatic winding bearing is to move in a circle, meeting Two kinds of possible movements are generated, one is rotating clockwise, another kind is to rotate counterclockwise, and for the semi-automatic wrist-watch that winds up It says, a fixed direction is needed to carry out the engagement between gear, be transmitted in former dynamic component one by one and store energy, this When just need a limitation movement direction mechanism (wind up non-return mechanism) come ensure to wind up automatically be all follow it is same Rule.

In the prior art, the non-return mechanism that winds up of wrist-watch system mainly includes wind up non-return pawl and non-return pawl spring, is winded up The cylindrical protrusions of the feature of non-return pawl as shown in figure 5, the position a is the centre bore of non-return pawl of winding up, on it and bottom plate It is combined together, can be freely rotatable；The position b and the position c are two wheel detent projections, their effect be with wind up it is non-return The gear teeth meshing of ratchet together, makes pawl enter working condition when winding up with the non-return ratchet gearing that winds up；The shape of the position d It is different with the above two, relative to generouser, its effect be it is non-return, stop non-return ratchet revolution of winding up；The position e is The place being snuggly mated to together with non-return detent spring.

It, can not but inventors have found that non-return pawl in the prior art often has can be beyond working trajectory the case where Guarantee non-return effect, and this kind of situation once occur, then needs to carry out on wrist-watch detachable maintaining, be not easy to the use of user.

Chinese utility model patent, notification number: CN2727814Y, authorize publication number: on September 21st, 2005 discloses one The Bidirectional winding-up mechanism of kind automatic watch, wherein the stopping device includes a supporting leg pawl being connected on the axle of carrier pulley It is fastenedly connected the reverse wheel in a tooth shaft with one, the two engagement is connected.The patent is only able to achieve non-return effect, when non-return Easily exceed working trajectory, does not still solve the problem.

Summary of the invention

According to the above-mentioned deficiencies of the prior art, the utility model proposes a kind of non-return pawl, it can guarantee non-return effect.

The utility model solves its technical problem using following technical scheme to realize:

A kind of non-return pawl, the non-return pawl includes ontology, and the ontology is equipped with mounting hole；First claw, setting In the side of the ontology；Second claw is set to the side of the ontology, and is located at first claw far from the installation The side in hole；First claw is engaged with non-return ratchet, when the first claw engages failure with non-return ratchet, second pawl Portion is engaged with non-return ratchet, forms non-return effect.

As the further improvement of the utility model, the ontology, first claw and second claw one Molding.

As the further improvement of the utility model, the non-return pawl further includes forced section, the forced section setting In the side of the ontology, and it is located at the side opposite with first claw and second claw, the forced section is born Towards the thrust of first claw, so that first claw is engaged with the holding of non-return ratchet.

As the further improvement of the utility model, the ontology is in flat.

As the further improvement of the utility model, auxiliary mounting hole is additionally provided on the ontology.

As the further improvement of the utility model, the auxiliary mounting hole is located at the mounting hole far from described first The side of claw and second claw.

The beneficial effects of the utility model are: devise two claws in the utility model, it is one of keep with it is non-return The engagement of ratchet prevents the counter-rotating of non-return ratchet, another its candidate effect, when engaging for the first claw and non-return ratchet After failure, the design of the second claw, which can substitute the first claw, to be realized and engages with non-return ratchet, prevents the reverse of non-return ratchet, So as to guarantee non-return effect.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is a kind of main view of specific embodiment of the utility model；

Fig. 2 is a kind of three-dimensional structure diagram of specific embodiment of the utility model；

Fig. 3 is a kind of three-dimensional structure diagram of the non-return pawl spring to match with the utility model；

Fig. 4 is that the non-return pawl of present embodiment is mounted on the structural schematic diagram on bottom plate；

Fig. 5 is the structural schematic diagram of non-return pawl in the prior art.

In figure: the non-return pawl spring of 1-, 11- pushing portion, the non-return pawl of 2-, 21- mounting hole, 22- ontology, the first claw of 23-, The second claw of 24-, 25- auxiliary mounting hole, 26- forced section, the non-return ratchet of 3-, 4- bottom plate.

Specific embodiment

Below by the description to embodiment, the shape of for example related each component of specific embodiment of the present utility model Shape, construction, the mutual alignment between each section and connection relationship, the effect of each section and working principle, manufacturing process and operation Application method etc., is described in further detail, to help inventive concept of the those skilled in the art to the utility model, technology Scheme has more complete, accurate and deep understanding.

As an embodiment of the present invention, a kind of non-return pawl is provided, the non-return pawl includes ontology, institute Ontology is stated equipped with mounting hole；First claw is set to the side of the ontology；Second claw is set to the side of the ontology Portion, and it is located at the side of first claw far from the mounting hole；First claw is engaged with non-return ratchet, when the first pawl When failure is engaged in portion with non-return ratchet, second claw is engaged with non-return ratchet, forms non-return effect.

Under normal operating conditions, the first claw is engaged with the holding of non-return ratchet, and the second claw is not contacted with non-return ratchet, this When the first claw be supplied to power of one, the non-return ratchet against rotation direction, prevent its counter-rotating, when the first claw with it is non-return When engagement between ratchet is failed, non-return ratchet generates the counter-rotating of certain angle, under the action of frictional force, the first claw Can be deflected centered on mounting hole with ontology and the second claw, deflection direction and non-return ratchet direction of rotation on the contrary, with The progress of rotation, the second claw are gradually engaged with non-return ratchet, and non-return ratchet is prevented to continue to rotate, and realize secondary non-return effect Fruit., can be in the case where the first claw fail by the design of the second claw in the utility model, the first claw of substitution is real It is now engaged with non-return ratchet, prevents the reverse of non-return ratchet, so as to guarantee non-return effect.

As a kind of specific embodiment of the utility model, as shown in Figs. 1-2, a kind of non-return pawl 2 is provided, it is described Non-return pawl 2 includes

Ontology 22；

Specifically, the ontology 22 is in flat, the ontology 22 is equipped with mounting hole 21, when installation, is worn using screw It crosses mounting hole 21 to be rotatablely connected ontology 22 and the bottom plate 4 of wrist-watch, the ontology 22 of non-return pawl 2 can be with the mounting hole 21 Axle center rotation.

First claw 23；

Specifically, first claw 23 is set to the side of the ontology 22, the first claw 23 and 22 one of ontology at Type.First claw 23, ontology 22 and mounting hole 21 form a traditional pawl structures, ontology 22 drive the first claw 23 around Mounting hole 21 rotate, the first claw 23 engages with non-return ratchet 3, and when non-return ratchet 3 rotates in the forward direction, the first claw 23 is not done The rotation for relating to non-return ratchet 3, when non-return 3 counter-rotating of ratchet, the first claw 23 pushes the teeth portion of non-return ratchet 3, prevents it Counter-rotating.

Second claw 24；

Specifically, second claw 24 is set to the side of the ontology 22, and it is separate to be located at first claw 23 The side of the mounting hole 21.Second claw 24 is integrally formed with the ontology 22.Second claw 24, ontology 22 and peace It fills hole 21 and forms a spare pawl structures, when the first claw 23 works normally, the second claw 24 does not contact non-return ratchet 3, when the first claw 23 engages failure with non-return ratchet 3, second claw 24 is engaged with non-return ratchet 3, the second claw 24 The teeth portion for pushing non-return ratchet 3 prevents its counter-rotating, forms non-return effect.

In a kind of optional embodiment of the utility model, the non-return pawl 2 further includes

Forced section 26；

Specifically, the forced section 26 is set to the side of the ontology 22, and it is located at and first claw 23 and institute The opposite side of the second claw 24 is stated, the forced section 26 bears the thrust towards first claw 23, so that described first Claw 23 is engaged with the holding of non-return ratchet 3.

In fact, the non-return pawl spring 1 to match with the non-return pawl 2 has also been devised in inventor, it as shown in figures 3 and 4, should Non-return pawl spring 1 has a pushing portion 11, and under working condition, for the non-return pawl spring 1 because self-deformation generates an elastic force, the elastic force is logical The forced section 26 that the pushing portion 11 pushes the non-return pawl 2 is crossed, under the action of this thrust, makes the first pawl of non-return pawl 2 Portion 23 and the second claw 24 keep the trend rotated towards non-return 3 place side of ratchet, to make under normal condition, the first pawl The holding of portion 23 and non-return ratchet 3, which engage, to be formed non-return effect and the first claw 23 and is engaged when failing with non-return ratchet 3, and second The timely cover of claw 24, engages to form non-return effect with non-return ratchet 3, guarantees non-return effect.

In a kind of optional embodiment of the utility model, it is additionally provided with auxiliary mounting hole 25 on the ontology 22, is being pacified When filling the non-return pawl 2, it is each passed through mounting hole 21 and auxiliary mounting hole 25 using the both ends of tweezers, and then can easily press from both sides Firmly non-return pawl 2, convenient for the non-return pawl 2 to be installed on the bottom plate 4 of wrist-watch.

Further, the auxiliary mounting hole 25 is located at the mounting hole 21 far from first claw 23 and described second The side of claw 24, to guarantee non-return 2 working end of pawl (i.e. one where the first claw 23, the second claw 24 and forced section 26 End) intensity.

The utility model is exemplarily described above, it is clear that the utility model implements not by aforesaid way Limitation, as long as not using the method concept of the utility model and the improvement of various unsubstantialities that technical solution carries out, or not It is improved that the conception and technical scheme of the utility model are directly applied into other occasions, in the protection model of the utility model Within enclosing.The protection scope of the utility model should be determined by the scope of protection defined in the claims.

Claims (6)

1. a kind of non-return pawl, it is characterised in that: the non-return pawl includes

Ontology, the ontology are equipped with mounting hole；

First claw is set to the side of the ontology；

Second claw is set to the side of the ontology, and is located at the side of first claw far from the mounting hole；

First claw is engaged with non-return ratchet, when the first claw engages with non-return ratchet failure, second claw with Non-return ratchet engagement, forms non-return effect.

2. non-return pawl according to claim 1, it is characterised in that: the ontology, first claw and described second Claw is integrally formed.

3. non-return pawl according to claim 1, it is characterised in that: the non-return pawl further includes forced section, it is described by Power portion is set to the side of the ontology, and is located at the side opposite with first claw and second claw, it is described by The thrust towards first claw is born in power portion, so that first claw is engaged with the holding of non-return ratchet.

4. non-return pawl according to claim 1, it is characterised in that: the ontology is in flat.

5. non-return pawl according to any one of claims 1-4, it is characterised in that: be additionally provided with auxiliary peace on the ontology Fill hole.

6. non-return pawl according to claim 5, it is characterised in that: it is separate that the auxiliary mounting hole is located at the mounting hole The side of first claw and second claw.