CN217462864U - Double-shaft hinge device and electronic equipment - Google Patents

Abstract

The utility model discloses a two-axis hinge device and electronic equipment, wherein two-axis hinge device includes: a hinge bracket; the first shaft is provided with a first limiting part, and the second shaft is provided with a first gear part; the first limiting group comprises a first clamping wheel, a second clamping wheel and a sliding positioning piece, wherein the first clamping wheel is provided with a first concave part, and the second clamping wheel is provided with a second concave part and a third concave part; the sliding positioning piece is arranged in the second cavity and can slide between the first clamping wheel and the second clamping wheel; the second limiting group comprises an idler wheel and a driven wheel, the idler wheel and the driven wheel are both arranged in the second cavity, and the idler wheel and the driven wheel are sequentially meshed with the first gear part for transmission; the driven wheel is also provided with a second limiting part which is used for matching with the first limiting part to limit the rotation of the first shaft. The utility model provides a device has realized twice rotation of primary shaft and secondary shaft in turn, and the screens point that hovers that produces when rotatory in turn satisfies the user's needs.

Description

Double-shaft hinge device and electronic equipment

Technical Field

The utility model relates to an electronic equipment technical field, concretely relates to two-axis hinge device and electronic equipment.

Background

General folding electronic devices, for example: notebook computers, tablet computers or mobile phones, etc. are mainly connected with a first board body and a second board body of an electronic device respectively through a single-shaft hinge or a double-shaft hinge. Wherein, the first plate body can be the upper cover of installation display screen, and the second plate body can be the base of installation spare part, battery and keyboard, and the first plate body can close or overturn to 360 degrees by 0 degree for the second plate body lid. In the dual-axis hinge device in the prior art, generally, the radial movable block is disposed between the two mandrels, so that the radial movable block slides between the two mandrels and is alternately engaged with the concave portions on the mandrels, and the two mandrels are alternately engaged with the stoppers to form an alternate locking action, so that the two mandrels rotate alternately, and the rotation alternate point generally is that the mandrel rotating first rotates 180 degrees, and at this time, a user applies an external force to slide the radial movable block, that is, the middle hovering node of the dual-axis hinge device in the prior art is that the two mandrels rotate 180 degrees relatively, but the hovering point does not belong to a habitual use angle of user operation and display, and the use feeling of the user is poor.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the present invention lies in overcoming the alternating rotation of two mandrels only completed by the double-axis hinge device in the prior art, and the rotation alternating point (i.e. the middle hovering node) does not belong to the habit use angle of user operation and exhibition, and the user's use feeling is relatively poor, providing a double-axis hinge device and an electronic apparatus.

According to a first aspect, the present invention provides a biaxial hinge device, including:

the hinge bracket comprises a first bracket, a second bracket and a third bracket, wherein a first cavity is arranged between the first bracket and the second bracket, and a second cavity is arranged between the second bracket and the third bracket;

a first shaft and a second shaft disposed parallel to each other and rotatably supported by the hinge bracket; the first shaft is provided with a first limiting part, and the second shaft is provided with a first gear part;

the first limiting group comprises a first clamping wheel, a second clamping wheel and a sliding positioning piece, wherein the first clamping wheel is coaxial with the first shaft and can synchronously rotate, and the second clamping wheel is coaxial with the second shaft and can synchronously rotate; the first clamping wheel is provided with a first concave part, and the second clamping wheel is provided with a second concave part and a third concave part; the sliding positioning piece is arranged in the second cavity and can slide between the first clamping wheel and the second clamping wheel so as to be clamped with the first concave part to limit the rotation of the first shaft and be clamped with the second concave part or the third concave part to limit the rotation of the second shaft;

the second limiting group comprises an idler wheel and a driven wheel, the idler wheel and the driven wheel are arranged in the second cavity, and the driven wheel, the idler wheel and the first gear part are sequentially in meshing transmission; the driven wheel is also provided with a second limiting part which is used for matching with the first limiting part to limit the rotation of the first shaft;

when the first shaft is at a first initial angle and the second shaft is at a second initial angle, the sliding positioning piece is clamped with the second concave part to limit the rotation of the second shaft, and the first shaft can rotate to a first middle angle relative to the hinge bracket along a first rotation direction;

when the first shaft rotates to a first middle angle relative to the hinge support along a first rotating direction, the second limiting part and the first limiting part are contacted to limit the rotation of the first shaft relative to the hinge support along the first rotating direction, the sliding positioning piece can slide until the first shaft is positioned in the first concave part to be clamped, and the second shaft can rotate to a second middle angle relative to the hinge support along a second rotating direction;

when the second shaft rotates to a second middle angle relative to the hinge support along a second rotation direction, the second limiting part and the first limiting part relieve the limitation of the first shaft, the sliding positioning piece can slide to the second shaft and be clamped with the third concave part, and the first shaft can rotate to a final angle relative to the hinge support along the first rotation direction.

Furthermore, the sliding positioning piece is provided with a first convex part corresponding to the first concave part and a second convex part corresponding to the second concave part and the third concave part.

Further, when the sliding positioning piece is engaged with the first concave part, the first convex part is contacted with two top end edges of the first concave part.

Further, when the sliding positioning piece is clamped with the second concave part, the second convex part is contacted with two top end edges of the second concave part; when the sliding positioning piece is clamped with the third concave part, the second convex part is contacted with two top end edges of the third concave part.

Furthermore, the sliding positioning part comprises a sliding part and a positioning part, the first convex part and the second convex part are both arranged on the positioning part, the end face of the sliding part is smaller than the end face of the positioning part, and the end face of the sliding part abuts against the first support.

Furthermore, the driven wheel is also provided with a second gear part corresponding to the idle wheel, and the second limiting part is a concave part at one end of the driven wheel close to the second bracket.

Furthermore, the first shaft is provided with a limiting wheel which is coaxial with the first shaft and can synchronously rotate, the limiting wheel is arranged corresponding to the driven wheel, and the first limiting part is a convex part at one end of the limiting wheel close to the second support.

Furthermore, the second clamping wheel is also provided with a stopping part, and the first bracket is correspondingly provided with a stopping block; the stopper portion cooperates with the stopper block to limit the rotational direction and rotational angle of the second shaft with respect to the hinge bracket.

According to a second aspect, the present invention provides an electronic device, comprising: the hinge device comprises a first body, a second body and the double-shaft hinge device of the first aspect, wherein the first body and the second body are respectively connected with a first shaft and a second shaft in the double-shaft hinge device.

The technical scheme provided by the utility model, following advantage has:

1. the utility model provides a double-shaft hinge device, through setting up first block wheel (with the coaxial rotation of primary shaft) in the first limit group and having first concave part, and have second concave part and third concave part on the second block wheel (with the coaxial rotation of secondary shaft), thereby make and slide between locating element and first block wheel and the second block wheel have three kinds of different limit states, can realize twice alternate rotation for primary shaft and secondary shaft in this double-shaft hinge device and provide the basis; the first shaft is limited after rotating to a specified angle by arranging a second limiting part which can be matched with the first limiting part on the first shaft so as to limit the rotation of the first shaft, further the first rotation alternation (the rotation is switched from the first shaft to the second shaft) of the first shaft and the second shaft is realized, an idle wheel and a driven wheel (the second limiting part is arranged on the driven wheel) which are sequentially meshed with and driven by a first gear part on the second shaft are arranged, so that the limitation of the first shaft by the second limiting part and the first limiting part can be relieved along with the rotation of the second shaft (at the moment, the first shaft is limited by the sliding positioning piece and the first concave part and still cannot rotate, and the rotation alternation is not influenced), the second rotation alternation of the double-shaft hinge device is prepared, the second shaft rotates to the specified angle, and the third concave part is opposite to the sliding positioning piece, the restriction of the first shaft by the slide holder and the first recess is also released, and the second rotation alternation of the first shaft and the second shaft (switching from the second shaft rotation to the first shaft rotation) is realized. The hovering card positions (generally, the hovering card positions are respectively an angle smaller than 180 degrees and an angle larger than 180 degrees, such as 120 degrees and 280 degrees, and can be flexibly adjusted) generated during the first rotation alternation and the second rotation alternation can respectively meet the requirements of a user when the user uses the electronic equipment and shows the electronic equipment to other people, and the use feeling of the user is improved.

2. The utility model provides a biaxial hinge device is through setting up the first convex part corresponding with first concave part on the slide positioning spare to set up first convex part into slide positioning spare and first concave part when block mutually, the state that two top edges of first convex part and first concave part contacted mutually, also be the state of line contact when setting up first convex part into with first concave part looks block, can reduce the abnormal sound when slide positioning spare and first block wheel block contact.

3. The utility model provides a biaxial hinge device, through set up the second convex part corresponding with second concave part and third concave part on sliding positioning spare, and set up the second convex part for when sliding positioning spare and second concave part looks block, the second convex part touches the state of supporting with two top edges of second concave part, and when sliding positioning spare and third concave part looks block, the second convex part touches supporting with two top edges of third concave part, be the state of line contact when also setting up the second convex part into with second concave part or third concave part looks block, abnormal sound when can reducing sliding positioning spare and second block wheel block contact.

4. The utility model provides an electronic equipment can realize twice rotatory two-axis hinge means in turn through equipping, has two card points of hovering that can satisfy the needs when user oneself uses electronic equipment and demonstrates to other people respectively, has promoted the user and has used the sense.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a biaxial hinge device according to an embodiment of the present invention;

fig. 2 is an exploded view of a biaxial hinge device according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating a first position-limiting set of the biaxial hinge device when it is not rotated;

FIG. 4 is a view showing a state structure of a second restriction group when the biaxial hinge device is not rotated;

FIG. 5 is a view of the first shaft rotated relative to the hinge bracket in a first rotational direction to a first intermediate angle, illustrating a first set of limits;

FIG. 6 is a view of the first shaft rotated relative to the hinge bracket in a first rotational direction to a first intermediate angle, in a second set of limit positions;

FIG. 7 is a view showing the configuration of the first limit group when the second shaft is rotated to a second intermediate angle in the second rotational direction with respect to the hinge bracket;

FIG. 8 is a view showing a second limit set when the second shaft is rotated to a second intermediate angle in the second rotational direction with respect to the hinge bracket;

FIG. 9 is a view showing a state of the first limit group when the first shaft is rotated to a final angle in the first rotation direction with respect to the hinge bracket;

FIG. 10 is a view showing a state of the second limit group when the first shaft is rotated to a final angle in the first rotation direction with respect to the hinge bracket;

description of reference numerals:

1-a hinge bracket; 11-a first support; 111-a stop block; 12-a second scaffold; 13-a third scaffold; 1 a-a first cavity; 1 b-a second cavity;

2-a first axis; 21-a limiting wheel; 211-a first stop;

3-a second axis; 31-a driving wheel; 311-a first gear part;

4-a first set of limit bits; 41-a first snap wheel; 411-a first recess; 42-a second snap wheel; 421-a second recess; 422-a third recess; 423-a stop; 43-a slide locator; 43 a-first projection; 43 b-a second projection; 431-a slide; 432-a positioning section;

5-a second set of limit bits; 51-an idler wheel; 52-driven wheel; 521-a second limiting part;

6-torsion unit.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

The application discloses electronic equipment, this electron are established including first organism, second organism and two-axis hinge means, and wherein first organism and second organism are connected with 2 and 3 second axles in the two-axis hinge means respectively.

Referring to fig. 1 to 10, a dual axis hinge device disclosed in the present application includes: hinge support 1, first axle 2, second axle 3, first limit position group 4 and second limit position group 5.

Referring to fig. 1 and 2, the hinge bracket 1 includes a first bracket 11, a second bracket 12, and a third bracket 13, wherein a first cavity 1a is formed between the first bracket 11 and the second bracket 12, and a second cavity 1b is formed between the second bracket 12 and the third bracket 13. As shown in fig. 1 and 2, based on the sliding positioning element 43 accommodated in the first cavity 1a, in order to prevent the sliding positioning element 43 from falling out of the entire device and limit the sliding path of the sliding positioning element 43, a protruding limiting plate is disposed on the end surface of the first bracket 11 facing the second bracket 12, or on the end surface of the second bracket 12 facing the first bracket 11 (in fig. 1 and 2, a limiting plate is disposed on the end surface of the first bracket 11 facing the second bracket 12 as an example), and the extending direction of the limiting plate is the same as the sliding direction of the sliding positioning element 43 (at least two limiting plates are disposed on two sides of the sliding positioning element 43 in the sliding direction); the second cavity 1b is used for accommodating and mounting the idle wheel 51 and the driven wheel 52, so that the second bracket 12 and the third bracket 13 are provided with mounting holes for the idle wheel 51 and the driven wheel 52; of course, the first bracket 11, the second bracket 12 and the third bracket 13 are also provided with shaft holes for accommodating the first shaft 2 and the second shaft 3.

Referring to fig. 1 and 2, the first shaft 2 and the second shaft 3 are parallel to each other and rotatably supported by the hinge bracket 1, and the first shaft 2 is provided with a first stopper 211 and the second gear is provided with a first gear 311. Specifically, in order to facilitate the production and assembly of the whole device, as shown in fig. 2, the first limiting portion 211 may be disposed on a limiting wheel 21, and the limiting wheel 21 is disposed coaxially and synchronously with the first shaft 2, and correspondingly, the first gear portion 311 may be disposed on a driving wheel 31, and the limiting wheel 21 is disposed coaxially and synchronously with the first shaft 2.

Referring to fig. 1-3, the first limiting set 4 includes a first engaging wheel 41, a second engaging wheel 42 and a sliding positioning member 43, wherein the first engaging wheel 41 is coaxial and can rotate synchronously with the first shaft 2, the second engaging wheel 42 is coaxial and can rotate synchronously with the second shaft 3, the first engaging wheel 41 has a first concave portion 411, and the second engaging wheel 42 has a second concave portion 421 and a third concave portion 422; the sliding positioning member 43 is disposed in the second cavity 1b and can slide between the first engaging wheel 41 and the second engaging wheel 42 to engage with the first concave portion 411 to limit the rotation of the first shaft 2, and engage with the second concave portion 421 or the third concave portion 422 to limit the rotation of the second shaft 3.

In this application, in order to reduce the noise when the slide positioning member 43 is engaged with the first engaging wheel 41, the slide positioning member 43 may be provided with a first convex portion 43a corresponding to the first concave portion 411, and when the slide positioning member 43 is engaged with the first engaging wheel 41, the first convex portion 43a may be abutted against the two top edges of the first concave portion 411. Specifically, referring to fig. 3, the first concave portion 411 may be set as a first arc-shaped groove, the first convex portion 43a may be set as a first arc-shaped convex portion, and the arc radius of the first arc-shaped groove may be set to be smaller than that of the first arc-shaped convex portion.

In the present application, in order to reduce the noise when the slide positioning member 43 is engaged with the second engaging wheel 42, the slide positioning member 43 may be provided with a second convex portion 43b corresponding to the second concave portion 421 and the third concave portion 422, and when the slide positioning member 43 is engaged with the second engaging wheel 42, the second convex portion 43b may be brought into contact with both top end edges of the second concave portion 421, or the second convex portion 43b may be brought into contact with both top end edges of the third concave portion 422. Specifically, referring to fig. 3, the second concave portion 421 and the third concave portion 422 may also be set as a second arc-shaped groove, the second convex portion 43b may also be set as a second arc-shaped convex portion, and the arc radius of the second arc-shaped groove may also be set to be smaller than the arc radius of the second arc-shaped convex portion.

In the present application, as shown in fig. 2 and 3, in order to reduce the frictional resistance generated when the sliding positioning member 43 slides in the second cavity 1b (i.e. slides between the first engaging wheel 41 and the second engaging wheel 42), the sliding positioning member 43 may include a sliding portion 431 and a positioning portion 432, the first protruding portion 43a and the second protruding portion 43b are both disposed on the positioning portion 432, the end surface of the sliding portion 431 is smaller than the end surface of the positioning portion 432, and the end surface of the sliding portion 431 abuts against the first bracket 11. In the present application, as shown in fig. 2, the sliding portion 431 may be provided only at one end of the slide holder 43, or the sliding portions 431 may be provided at both ends of the slide holder 43, and in this case, the end surfaces of the sliding portions 431 both abutting against the first bracket 11 and the second bracket 12.

Referring to fig. 1-4, the second limiting set 5 includes an idle wheel 51 and a driven wheel 52, the idle wheel 51 and the driven wheel 52 are disposed in the second cavity 1b, the driven wheel 52, the idle wheel 51 and the first gear portion 311 are sequentially engaged for transmission, the driven wheel 52 further has a second limiting portion 521, and the second limiting portion 521 is used to cooperate with the first limiting portion 211 to limit the rotation of the first shaft 2. In this application, the first limiting portion 211 is a convex portion on the limiting wheel 21, and the second limiting portion 521 is a convex portion on the driven wheel 52, and in order to facilitate the production and preparation of the first limiting portion 211 and the second limiting portion 521, the first limiting portion 211 may be disposed at one end of the limiting wheel 21 close to the second bracket 12, and the second limiting portion 521 may be disposed at one end of the driven wheel 52 close to the second bracket 12.

In the present application, when the first shaft 2 is at the first initial angle and the second shaft 3 is at the second initial angle, the sliding positioning element 43 is engaged with the second recess 421 to limit the rotation of the second shaft 3, and the first shaft 2 can rotate to the first intermediate angle along the first rotation direction relative to the hinge bracket 1; when the first shaft 2 rotates to a first middle angle along the first rotation direction relative to the hinge bracket 1, the first concave portion 411 is opposite to the sliding positioning piece 43, the second limiting portion 521 and the first limiting portion 211 contact to limit the rotation of the first shaft 2 relative to the hinge bracket 1 along the first rotation direction, the sliding positioning piece 43 can slide to the first engaging wheel 41 under the driving of an external force to be engaged with the first concave portion 411 to limit the rotation of the first shaft 2 (the limitation of the first shaft 2 by the second limiting portion 521 and the first limiting portion 211 is released along with the rotation of the second shaft 3, but the sliding positioning piece 43 is engaged with the first concave portion 411 to continue to limit the rotation of the first shaft 2), the limitation of the sliding positioning piece 43 and the second concave portion 421 on the second shaft 3 is released, and the second shaft 3 can rotate to a second middle angle along the second rotation direction relative to the hinge bracket 1; when the second shaft 3 rotates to a second intermediate angle in the second rotation direction relative to the hinge bracket 1, the third concave portion 422 on the second engaging wheel 42 is opposite to the sliding positioning member 43, the driven wheel 52 rotates based on the rotation of the second shaft 3 (i.e. the driving wheel 31), the restriction of the first shaft 2 by the first limiting portion 211 and the second limiting portion 521 on the driven wheel 52 is released, the sliding positioning member 43 can slide to the second engaging wheel 42 under the driving of an external force to engage with the third concave portion 422 to restrict the rotation of the second shaft 3, and the first shaft 2 can rotate to a final angle in the first rotation direction relative to the hinge bracket 1.

In the present application, in order to allow the first shaft 2 and the second shaft 3 to be freely stopped when rotating, as shown in fig. 1 and 2, a torsion unit 6 may be further provided on the first shaft 2 and the second shaft 3.

In the present application, in order to further accurately limit the alternating rotation of the first shaft 2 and the second shaft 3, please refer to fig. 2 and fig. 3, a stopping portion 423 may be further disposed on the second engaging wheel 42, and a corresponding stopping block 111 is disposed on the first bracket 11, so that the stopping portion 423 can cooperate with the stopping block 111 to limit the rotation direction and the rotation angle of the second shaft 3 relative to the hinge bracket 1. Specifically, when the second shaft 3 is at the second initial angle, the stopper 423 and the stopper 111 limit the rotation direction of the second shaft 3, so that it can only rotate in the second rotation direction; when the second shaft 3 rotates to the second intermediate angle, the stopping portion 423 and the stopping block 111 limit the rotation angle of the second shaft 3, so that the second shaft cannot rotate any further. Similarly, the first engaging wheel 41 can be provided with a similar structure, which is not described in detail herein.

The operation of the biaxial hinge device of the present application will be described below.

Please refer to fig. 1, which is a structural diagram of the biaxial hinge device when it is not rotated, at this time, the state structures of the first limit group 4 and the second limit group 5 are respectively shown in fig. 3 and fig. 4, wherein the sliding positioning element 43 is engaged with the second recess 421 on the second engaging wheel 42 to limit the second shaft 3 from rotating, and meanwhile, the stopping portion 423 on the second engaging wheel 42 is contacted with the stopping block 111 on the first bracket 11 to also limit the second shaft 3 to rotate only toward the second rotation direction (counterclockwise direction in the state shown in the figure) during the next operation; the first shaft 2 is rotatable relative to the hinge bracket 1 in a first rotational direction (clockwise in the state shown in the figure) (based on the corresponding electronic device being in a closed state in this state, the first shaft 2 is only rotatable relative to the hinge bracket 1 in the first rotational direction based on the opening rotation and is not rotatable in a second rotational direction; of course, corresponding limiting structures may be provided on the first engaging wheel 41 and the first bracket 11 for further limitation).

Referring to fig. 5 and fig. 6, the structural diagrams of the states of the first limit set 4 and the second limit set 5 when the first shaft 2 rotates to a first middle angle (the first shaft 2 rotates 120 degrees in the figures) relative to the hinge bracket 1 along the first rotation direction are shown, at this time, the first limit portion 211 and the second limit portion 521 contact and limit the first shaft 2 so as to stop rotating, and the first concave portion 411 on the first shaft 2 is opposite to the sliding positioning member 43. In this state, the user continues to apply an external force to rotate the second shaft 3 along the second rotation direction, and when the second shaft starts to rotate, the sliding positioning member 43 is pushed to slide toward the first shaft 2 to abut against the first concave portion 411 to limit the first shaft 2 from rotating, and the second limiting portion 521 no longer abuts against the first limiting portion 211 along with the rotation of the second shaft 3 (the first gear portion 311 on the second shaft 3 sequentially drives the idle gear 51 and the driven gear 52 to rotate, so that the second limiting portion 521 on the driven gear 52 no longer abuts against the first limiting portion 211).

Referring to fig. 7 and 8, a state structure diagram of the first limit group 4 and the second limit group 5 when the second shaft 3 rotates to a second intermediate angle (the second shaft 3 rotates 160 degrees in the drawing, that is, the first shaft 2 and the second shaft 3 rotate 280 degrees relatively) relative to the hinge bracket 1 along the second rotation direction is shown, at this time, the stop portion 423 on the second engaging wheel 42 abuts against the stop block 111 to prevent the second shaft 3 from rotating continuously (of course, this stop situation is only an example in the drawing, shapes of the first limit portion 211 and the second limit portion 521 may also be set, so that the first limit portion 211 and the second limit portion 521 can generate stop limit on the second shaft 3 in this state, and other stop structures may also be set), and the third concave portion 422 on the second engaging wheel 42 corresponds to the sliding positioning member 43. In this state, the user continues to apply the external force to rotate the first shaft 2 in the first rotation direction again, and when the rotation starts, the sliding positioning member 43 is pushed to slide toward the second shaft 3 to abut against the third recess 422 to limit the rotation of the second shaft 3.

Referring to fig. 9 and 10, the structural diagrams of the states of the first limiting group 4 and the second limiting group 5 are shown when the first shaft 2 rotates to a final angle (the first shaft 2 rotates 80 degrees in the figure, that is, the first shaft 2 and the second shaft 3 rotate 360 degrees relatively) along the first rotation direction relative to the hinge bracket 1.

In the biaxial hinge device, the first engaging wheel 41 (rotating coaxially with the first shaft 2) in the first limit group 4 is provided with the first concave part 411, and the second engaging wheel 42 (rotating coaxially with the second shaft 3) is provided with the second concave part 421 and the third concave part 422, so that the sliding positioning piece 43 and the first engaging wheel 41 and the second engaging wheel 42 have three different limit states, and a basis is provided for realizing two times of alternate rotation of the first shaft 2 and the second shaft 3 in the biaxial hinge device; the restriction of the first shaft 2 by the second stopper 521 which is engaged with the first stopper 211 on the first shaft 2 to restrict the rotation of the first shaft 2 is realized by rotating the first shaft 2 to a predetermined angle (the first concave portion 411 on the first engaging wheel 41 is rotated to be opposed to the slide holder 43 to release the restriction of the second shaft 3), and the first rotation alternation of the first shaft 2 and the second shaft 3 (the rotation is switched from the rotation of the first shaft 2 to the rotation of the second shaft 3) is realized, and the idle wheel 51 and the driven wheel 52 which are sequentially engaged with and driven by the first gear portion 311 on the second shaft 3 are provided (the second stopper 521 is provided on the driven wheel 52), so that the restriction of the first shaft 2 by the second stopper 521 and the first stopper 211 can be released along with the rotation of the second shaft 3 (at this time, the first shaft 2 is restricted by the slide holder 43 and the first concave portion 411, still unable to rotate and thus does not affect the "alternation" of rotation), and after the second shaft 3 is rotated to a specified angle and the third recess 422 faces the slide retainer 43, the limitation of the slide retainer 43 and the first recess 411 to the first shaft 2 is also released, thereby realizing the second rotation alternation of the first shaft 2 and the second shaft 3 (switching from the rotation of the second shaft 3 to the rotation of the first shaft 2). The hovering card positions (generally, the hovering card positions are respectively an angle smaller than 180 degrees and an angle larger than 180 degrees, such as 120 degrees and 280 degrees, and can be flexibly adjusted) generated during the first rotation alternation and the second rotation alternation can respectively meet the requirements of a user when the user uses the electronic equipment and shows the electronic equipment to other people, and the use feeling of the user is improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (9)

1. A biaxial hinge device characterized by comprising:

the hinge bracket comprises a first bracket, a second bracket and a third bracket, wherein a first cavity is arranged between the first bracket and the second bracket, and a second cavity is arranged between the second bracket and the third bracket;

a first shaft and a second shaft disposed parallel to each other and rotatably supported by the hinge bracket; the first shaft is provided with a first limiting part, and the second shaft is provided with a first gear part;

the first limiting group comprises a first clamping wheel, a second clamping wheel and a sliding positioning piece, wherein the first clamping wheel is coaxial with the first shaft and can synchronously rotate, and the second clamping wheel is coaxial with the second shaft and can synchronously rotate; the first clamping wheel is provided with a first concave part, and the second clamping wheel is provided with a second concave part and a third concave part; the sliding positioning piece is arranged in the second cavity and can slide between the first clamping wheel and the second clamping wheel so as to be clamped with the first concave part to limit the rotation of the first shaft and be clamped with the second concave part or the third concave part to limit the rotation of the second shaft;

the second limiting group comprises an idler wheel and a driven wheel, the idler wheel and the driven wheel are arranged in the second cavity, and the driven wheel, the idler wheel and the first gear part are sequentially in meshing transmission; the driven wheel is also provided with a second limiting part which is used for being matched with the first limiting part to limit the rotation of the first shaft;

when the first shaft is at a first initial angle and the second shaft is at a second initial angle, the sliding positioning piece is clamped with the second concave part to limit the rotation of the second shaft, and the first shaft can rotate to a first middle angle relative to the hinge bracket along a first rotation direction;

when the first shaft rotates to a first middle angle relative to the hinge bracket along a first rotating direction, the second limiting part and the first limiting part are in contact with each other to limit the rotation of the first shaft relative to the hinge bracket along the first rotating direction, the sliding positioning piece can slide to the first clamping wheel to be clamped with the first concave part, and the second shaft can rotate to a second middle angle relative to the hinge bracket along a second rotating direction;

when the second shaft rotates to a second middle angle relative to the hinge support along a second rotation direction, the second limiting portion and the first limiting portion release the limitation of the first shaft, the sliding positioning piece can slide to the second clamping wheel to be clamped with the third concave portion, and the first shaft can rotate to a final angle relative to the hinge support along the first rotation direction.

2. A biaxial hinge device as defined in claim 1, wherein said slide positioning member is provided with a first convex portion corresponding to said first concave portion, and a second convex portion corresponding to said second concave portion and said third concave portion.

3. The biaxial hinge device as defined in claim 2, wherein the first convex portion abuts against both top end edges of the first concave portion when the slide positioning member is engaged with the first concave portion.

4. A biaxial hinge device as set forth in claim 2 or 3, wherein the second convex portion abuts against both top end edges of the second concave portion when the slide positioning member is engaged with the second concave portion; when the sliding positioning piece is clamped with the third concave part, the second convex part is contacted with two top end edges of the third concave part.

5. The biaxial hinge device as defined in claim 4, wherein the sliding positioning member includes a sliding portion and a positioning portion, the first protrusion and the second protrusion are both disposed on the positioning portion, an end surface of the sliding portion is smaller than an end surface of the positioning portion, and the end surface of the sliding portion abuts against the first bracket.

6. The biaxial hinge device as defined in claim 1, wherein the driven wheel further has a second gear portion corresponding to the idler wheel, and the second limiting portion is a recessed portion at an end of the driven wheel close to the second bracket.

7. The dual-axis hinge device as claimed in claim 6, wherein the first shaft is provided with a limiting wheel which is coaxial with the first shaft and can rotate synchronously, the limiting wheel is arranged corresponding to the driven wheel, and the first limiting portion is a convex portion at one end of the limiting wheel close to the second bracket.

8. The dual-axis hinge device as claimed in claim 7, wherein the second engaging wheel further has a stopping portion, and the first bracket is correspondingly provided with a stopping block; the stopper portion cooperates with the stopper block to limit a rotational direction and a rotational angle of the second shaft with respect to the hinge bracket.

9. An electronic device, comprising:

a first body, a second body, and the biaxial hinge device as set forth in any one of claims 1 to 8, the first body and the second body being connected to a first shaft and a second shaft, respectively, in the biaxial hinge device.

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