CN110296142A

CN110296142A - Alternately switching overturns structure to twin shaft

Info

Publication number: CN110296142A
Application number: CN201810243215.4A
Authority: CN
Inventors: 张凯岚
Original assignee: Jarllytec Co Ltd
Current assignee: Jarllytec Co Ltd
Priority date: 2018-03-23
Filing date: 2018-03-23
Publication date: 2019-10-01
Anticipated expiration: 2038-03-23
Also published as: CN110296142B

Abstract

A kind of twin shaft alternating switching overturning structure, with the first mandrel, second mandrel is respectively pivoted in a positioning board group, first mandrel, second mandrel is respectively provided with the first plane, second plane, and first mandrel, axis connects the first cam to second mandrel respectively, second cam, each mandrel is allowed to rotate synchronously respectively with respective cam, and the long elements of a sliding shoe are contained in the long groove of positioning board group, and it is located at the first mandrel, to be pushed by each mandrel between second mandrel, and first cam, second cam is located at the top and bottom end of the short shape part of sliding shoe, short shape part is pushed with synchronous respectively, so as in the first mandrel, two groups of alternating switching constructions are formed during second mandrel alternate rotation, make to compensate one another gap caused by respectively alternating switching action, until long, short shape part synchronizes that compress a spindle surface and cam therein recessed respectively Portion and form clamping lock.

Description

Alternately switching overturns structure to twin shaft

Technical field

The present invention relates to a kind of twin shaft, alternately the folding of conjunction can be raised and be covered to switching overturning structure more particularly to a kind of be installed on Person on stacked electronic device.

Background technique

General folding-type electronic device, such as: notebook computer, tablet computer or mobile phone etc., mainly thoroughly It crosses single axle hinge or Double-pin hinge distinguishes the first plate body and the second plate body of electronic device in succession.Wherein, the first plate body can To be the upper cover for installing display screen, the second plate body can be the pedestal of installation spare part, battery and keyboard, and the first plate body can It is closed relative to the second plate body lid or by 0 degree of overturning to 360 degree.

As People's Republic of China's utility model announces No. CN203962677U " the twin axle hinge that can be alternately rotated It shown in chain " Patent Case, that is, shows a kind of foldable structure of twin axle, mainly includes connector, two mandrels, axial activity Part and radially movable part.Connector includes the framework and frame body for having upper and lower two axis holes, is distinguished for each mandrel parallel to each other It wears.Axial movable part one end imports an at least spiral goove set by another mandrel, can axially be slided with synchronizing actuation Remove framework perforation set between two axis holes up and down.Each mandrel has at least one stopper section, mandrel stopper section and axial direction The mutual backstop in stopper section set by the mutual backstop in movable part the other end, another mandrel stopper section and framework side.Each mandrel is equal There is engaging cam part, an engaging cam part periphery is equipped with a recess portion, and another engaging cam part periphery is equipped with multiple recess portions.It is radial Movable part can radial slippage be between each engaging cam part and alternating engages and be locked in one of recess portion, alternately to arrange in pairs or groups respectively Each backstop action and formed at least twice replace clamping lock movement, allow each mandrel to be alternately rotated.

It is alternately rotated structure by above-mentioned, can allow the opposite overturning of two shafts to 360 degree really.And times of above structure One group of stopper section and cam part are the different component in same mandrel, and such arrangement equally shows that the People's Republic of China (PRC) is practical In model publication the CN203130774Uth " pin-type card lock type double-shaft pivot device " Patent Case.Wherein, when stopper section and cam Axis connects when in same mandrel respectively in portion, that is, indicates to need to provide longer mandrel length to accommodate two different elements, such as This one, it will increases the quantity of spare part, and then increases the axial length of mandrel and the volume of entirety, and increase processing operation Process and time.

Summary of the invention

In consideration of it, in order to provide a kind of structure for being different from the prior art, and improving above-mentioned disadvantage, inventor's product is for many years Experience and continuous research and development improve, then have generation of the invention.

A purpose of the invention is providing a kind of twin shaft alternating switching overturning structure, and can improve the existing structure that is alternately rotated must It need be equipped with simultaneously stopper section and two elements of cam part in same mandrel, will increase quantity, the overall volume of spare part, into And the problem of increasing processing flow chart and time, by the long and short shape part that two groups of alternating switching constructions are penetrated to a sliding shoe The effect of being connected together, forming synchronous floating clamping lock, and mutually compensate each other during alternately switching action because is produced from gap Raw influence, and further stopper section can be allowed to be combined together with cam part, in conjunction with rear easy to manufacture and processing, to shorten Axial length, and then reduce overall volume, reduce process and spare part to reduce production cost.

In order to achieve the above object, alternately switching overturning structure includes a positioning board group, a sliding to the twin shaft set by the present invention Block, a first rotating shaft group and one second shaft group.Wherein, there is a long groove in the side of the positioning board group；The sliding shoe Including a long elements and a short shape part, long elements be contained in long groove in a manner of it opposite can slide, and in the long elements Top, bottom both ends are respectively provided with end plane；The first rotating shaft group includes coaxial and one first cam that can be rotated synchronously and one the One mandrel, the first cam are located at the top of short shape part and have one first recess portion；First mandrel is pivotally connected the upper half of the positioning board group The segment section periphery top on portion and the top for being located at long elements, the first mandrel has one first plane；The second shaft group includes Coaxial and one second cam that can be rotated synchronously and one second mandrel, the second cam are located at the bottom end of short shape part and have one second Recess portion；Second mandrel is pivotally connected the lower half of the positioning board group and is located at the bottom end of long elements, the segment section periphery top of the second mandrel End has one second plane.

When implementation, the side upper half of the positioning board group is also further provided with one first limiting section, and the first rotating shaft Group also further the bottom end of first cam be radially recessed with one first arc lack portion, corresponding to short shape part top and keep this short The periphery of shape part and first cam is mutually from the top of first cam has one first arc protrusion of radially protruding, this first The side of arc protrusion has one first stopper section, and for compressing the side of first limiting section, the other side of the first arc protrusion has Have one second stopper section, for compressing the other side of first limiting section, rotated to the backstop first rotating shaft group, and make this One recess portion is formed in the periphery top of the first arc protrusion.

When implementation, the side lower half of the positioning board group is also further provided with one second limiting section, and second shaft Group also further the bottom end of second cam be radially recessed with one second arc lack portion, corresponding to short shape part bottom end and keep this short The periphery of shape part and second cam is mutually from the top of second cam has one second arc protrusion of radially protruding, this second The side of arc protrusion has a third stopper section, and for compressing the side of second limiting section, the other side of the second arc protrusion has Have one the 4th stopper section, for compressing the other side of second limiting section, rotated to backstop the second shaft group, and make this Two recess portions are formed in the periphery top of the second arc protrusion.

When implementation, the side lower half of the positioning board group or the upper half are also further provided with one second limiting section or one first Limiting section, the long groove are located between first limiting section and second limiting section；Respective arc is further lacked portion by each cam With arc protrusion position on the path of same circular motion, distinguish respective limiting section during the rotation of each shaft group It is lacked positioned at respective arc and forms Relative angular displacement in portion and respectively with respective arc protrusion.In other words, first cam is into one First arc is lacked portion and the first arc protrusion position on the path of same circular motion by step, with what is rotated in the first rotating shaft group In the process, make first limiting section be located at first arc to lack in portion and form Relative angular displacement with the first arc protrusion；It is another Second arc is further lacked portion and the second arc protrusion position on the path of same circular motion by aspect, second cam, with During the second shaft group rotation, make second limiting section be located in the scarce portion of second arc and with the second arc protrusion shape At Relative angular displacement.

When implementation, which includes one first side plate and one second side plate being parallel to each other, the first mandrel while pivot The upper half of the first side plate and the upper half of the second side plate are connect, the second mandrel is pivotally connected lower half and second side of the first side plate simultaneously The lower half of plate, the first limiting section and the second limiting section are two convex blocks set on the first side plate side, and long groove is formed in the In the side of side plate.

When implementation, the segment section periphery bottom end of first mandrel also has a third rank portion and a third plane, makes third The length of plane and is connected to first camshaft at the third rank portion of first mandrel, and less than the length of the first plane When one central axis, third plane is in the state that will not be in contact with the top of long elements.

When implementation, the segment section periphery bottom end of second mandrel also has a fourth order portion and a fourth plane, makes the 4th The length of plane and is connected to second camshaft at the fourth order portion of second mandrel, and less than the length of the second plane When two central axis, fourth plane is in the state that will not be in contact with the bottom end of long elements.

When implementation, the top of the short shape part has one first protrusion, which has complementary shape with the first protrusion Shape size.

When implementation, the bottom end of the short shape part has one second protrusion, which has complementary shape with the second protrusion Shape size.

When implementation, the upper half and lower half of the positioning board group have axially penetrated through a circular hole respectively, supply the first mandrel respectively Run through and be pivotally connected with the second mandrel, and each circular hole of upper and lower half and top, the bottom both ends of long groove are respectively communicated with.

Detailed description of the invention

Fig. 1 is the element exploded view of the preferred embodiment of the present invention.

Fig. 2 is the stereo appearance figure of the preferred embodiment of the present invention.

Fig. 3 is the A-A ' sectional view of Fig. 2.

Fig. 4 is the B-B ' sectional view of Fig. 2.

Fig. 5 is the use state diagram when first rotating shaft group of Fig. 3 is persistently overturn to 180 degree.

Fig. 6 is the use state diagram when first rotating shaft group of Fig. 4 is persistently overturn to 180 degree.

The first rotating shaft group that Fig. 7 is Fig. 5 is by clamping lock, and the second shaft group connects use state signal when overturning 180 degree Figure.

The first rotating shaft group that Fig. 8 is Fig. 6 is by clamping lock, and the second shaft group connects use state signal when overturning 180 degree Figure.

Fig. 9 is the element exploded view of another preferred embodiment of the invention.

Figure 10 is the stereo appearance figure of the subelement of another preferred embodiment of the invention.

Figure 11 is the stereo appearance figure of another preferred embodiment of the invention.

Figure 12 is the A-A ' sectional view of Figure 11.

Figure 13,14 are the use state diagram of another preferred embodiment of the invention when overturning 180 degree.

Figure 15,16 are the use state diagram of another preferred embodiment of the invention in turn over 360 deg.

Description of symbols:

Alternately switching overturning structure 1 positions board group 2 to twin shaft

First side plate, 21 second side plate 22

Long 23 first limiting section 24 of groove

Second limiting section, 25 sliding shoe 3

31 top facial planes 311 of long elements

The short shape part 32 of bottom end facial planes 312

First protrusion, 321 second protrusion 322

First interval, 33 second interval 34

4 first cam 41 of first rotating shaft group

First arc protrusion, 411 first recess portion 412

First stopper section, 413 second stopper section 414

First arc lacks 415 first mandrel 42 of portion

First plane, 421 third plane 422

First rank portion, 423 third rank portion 424

First friction element, 43 first torsion unit 44

First plate body, 45 nut 46

Second shaft group, 5 second cam 51

Second arc protrusion, 511 second recess portion 512

The 4th stopper section 514 of third stopper section 513

Second arc lacks 515 second mandrel 52 of portion

Second plane, 521 fourth plane 522

523 fourth order portion 524, second-order portion

Second friction element, 53 second torsion unit 54

Second plate body, 55 nut 56.

Specific embodiment

It please refers to shown in Fig. 1 ~ 8, alternately switches a preferred embodiment of overturning structure 1, including one for twin shaft of the present invention Position board group 2, a sliding shoe 3, the first rotating shaft group 4 and one second shaft group 5 being parallel to each other.

The positioning board group 2 includes being parallel to each other and identical one first side plate 21 of outer peripheral edge shape size and one second side plate 22, the upper half of the upper half of the first side plate 21 and the second side plate 22 is respectively equipped with a circular hole on the same axis, so as to allowing After one first mandrel 42 is perforative simultaneously, it is pivotally connected the upper half of the first side plate 21 and the upper half of the second side plate 22 respectively；And the The lower half of side plate 21 and the second side plate 22 is respectively equipped with another circular hole on the same axis, so as to allowing one second mandrel 52 After perforative simultaneously, it is pivotally connected the lower half of the first side plate 21 and the lower half of the second side plate 22 respectively.First side plate 21 and second Have on the central location of one side between side plate 22 and be recessed inwardly and be in a longitudinal long groove 23, such as shown in the figure, And be respectively communicated with each circular hole of the upper and lower half of the first side plate 21 and top, the bottom both ends of long groove 23, so as to being formed for work Dynamic space.

The sliding shoe 3 is that section is T-shaped blocky combination, including a long elements 31 and a short shape part 32.Wherein, elongated Part 31 is rectangular body, and top, the bottom both ends of long elements 31 are respectively provided with end plane 311,312, the transverse width of long elements 31 Less than the transverse width of long groove 23, so as to allowing the receiving of long elements 31 to be positioned in long groove 23.The longitudinal length of long elements 31 It can just be touched with its opposite end surface and be touched in the periphery of the first mandrel 42 with the plane of the second mandrel 52 or respectively respectively It is preferred in the periphery of the plane and the second mandrel 52 of the first mandrel 42, so as to allowing one end of long elements 31 by mandrel pressure therein It is dynamic and can be slided above and below in long groove 23, and it is therein another in long groove 23 to resist the other end of long elements 31 One mandrel forms clamping lock.And short shape part 32 is with the outwardly extending another rectangle in direction far from 31 one side of long elements Body replaces switching effect between long elements 31 and each mandrel to assist, and the longitudinal length of short shape part 32 is less than long elements 31 longitudinal length, the top of short shape part 32 have one first protrusion 321 of upward arc protrusion, and the bottom end of short shape part 32 has One second protrusion 322 protruded to arc lower, makes the top of short shape part 32, bottom both ends of the surface be different from the top of long elements 31, bottom both ends Face.

The first rotating shaft group 4 includes one first cam 41, one first mandrel 42, one first friction element 43 and one first torsion Power unit 44.Wherein, the first cam 41 is plate-like, and the first cam 41 is located at the top of short shape part 32, the top of the first cam 41 With one first recess portion 412, the first protrusion 321 of the first recess portion 412 and short shape part 32 has complementary shape size.First heart Axis 42 has cricoid one first rank portion 423, and when assembling, as benchmark, for Qi, his Zu Cheng Agencies part connects installation, such as makes One end of first mandrel 42 connects one first plate body 45, and the first plate body 45 is that connecting plate is upper where display screen to be installed on Lid, and the other end of the first mandrel 42 is made to be located at the tops of long elements 31, the segment section periphery top of 42 other end of the first mandrel (mean to eliminate the segment section of the first mandrel other end coaxial with first plane 421 coaxial with the axle center of the first mandrel 42 A virtual arch cylinder after, form first plane, it is subsequent second, third, fourth plane also with signified, repeat no more), supply The first cam 41 of positioning is connect through simultaneously axis, the first mandrel 42 and the first cam 41 is allowed to rotate synchronously；The segment section of first mandrel 42 Periphery bottom end is with coaxial and summation is isometric or slightly different from a third rank portion of the first plane 421 with the axle center of the first mandrel 42 424 and a third plane 422, third plane 422 is parallel to each other with the first plane 421, and the length of third plane 422 is less than The length of one plane 421, and make first heart of the axis hole profile of the first cam 41 and the adjacent third rank portion 424 of the first plane 421 42 cross section profile of axis reciprocal correspondence is arched, is different from the axis hole profile of the first friction element 43 and the first torsion unit 44, energy It allows 41 axis of the first cam to be connected at the third rank portion 424 of the first mandrel 42, forms engaging, when the rotation of the first mandrel 42, third Plane 422 is in the state that will not be in contact with the top of long elements 31.

When the first mandrel 42 pass through the first cam 41, the first friction element 43 and the first torsion unit 44 after, with a spiral shell Cap 46 screws togather, and the first friction element 43 is made to form corresponding male and fomale(M&F) with the upper half contact surface for positioning board group 2, so as to allowing First cam 41, the first mandrel 42, the first friction element 43 and the first torsion unit 44 rotate synchronously.Pass through the first friction element 43 pivoting friction simultaneously pushes generated torsion in pivoting friction and mutually with the first torsion unit 44, and the first plate body 45 is made to exist It can freely be stagnated when rotation, or when the first friction element 43 is closed to the upper half of positioning board group 2, in preset angular positions shape At positioning.

And the second shaft group 5 includes one second cam 51, one second mandrel 52, one second friction element 53 and one second Torsion unit 54.Wherein, the second cam 51 is plate-like, and the second cam 51 is located at the bottom end of short shape part 32, the top of the second cam 51 End has one second recess portion 512, and the second protrusion 322 of the second recess portion 512 and short shape part 32 has complementary shape size.Second Mandrel 52 has cricoid second-order portion 523, and in assembling, as benchmark, for Qi, his Zu Cheng Agencies part connects installation, such as One end of the second mandrel 52 is set to connect one second plate body 55, the second plate body 55 is connecting plate to be installed on spare part, battery With the pedestal of keyboard.The other end of second mandrel 52 is located at the bottom end of long elements 31, the segment section week of 52 other end of the second mandrel Edge top has second plane 521 coaxial with the axle center of the second mandrel 52, for through and axis connect and position the second cam 51, allow the Two mandrels 52 and the second cam 51 rotate synchronously；The segment section periphery bottom end of second mandrel 52 has the axle center with the second mandrel 52 Coaxial and summation is isometric or slightly different from a fourth order portion 524 of the second plane 521 and a fourth plane 522, fourth plane 522 with Second plane 521 is parallel to each other, and the length of fourth plane 522 makes the axis of the second cam 51 less than the length of the second plane 521 Second mandrel, 52 cross section profile in the adjacent fourth order portion 524 of hole profile and the second plane 521 corresponds to each other arched, is different from the Two friction elements 53 and the second torsion unit 54 etc. form the axis hole profile of component, and 51 axis of the second cam can be allowed to be connected to second heart At the fourth order portion 524 of axis 52, engaging is formed, when the rotation of the second mandrel 52, fourth plane 522 and the bottom end of long elements 31 are in The state that will not be in contact.

After the second mandrel 52 passes through the second cam 51, the second friction element 53 and the second torsion unit 54, with a spiral shell Cap 56 screws togather.Second friction element 53 forms corresponding male and fomale(M&F) with the lower half contact surface of positioning board group 2, so as to allowing second Cam 51, the second mandrel 52, the second friction element 53 and the second torsion unit 54 rotate synchronously.Pass through the second friction element 53 Pivoting friction simultaneously pushes generated torsion in pivoting friction and mutually with the second torsion unit 54, is rotating the second plate body 55 When can freely stagnate, or when the second friction element 53 is closed to the lower half of the positioning board group 2, formed in preset angular positions Positioning.

Whereby, in the present embodiment, traditional stopper section/stop configurations (stop tab collocation backstop can be not used in the present invention The mutual backstop of block) in the case where, allow a shaft group to rotate and make another shaft group stop, one is two plate bodys turn from lid conjunction state Before opposite overturning to 180 degree, pass between the sliding shoe, two mandrels and two cams is referred to shown in Fig. 3 ~ 6, the length Shape part 31 pushes up, the end plane 311,312 at bottom both ends touches the segment section periphery and the second mandrel 52 for supporting the first mandrel 42 respectively Second plane 521, and the bottom end of short shape part 32 is made to touch the state for supporting the second recess portion 512 of the second cam 51, at second turn Dual clamping lock effect is formed at the two of axis group 5；For example, when the first plate body 45 relative to the second plate body 55 in lid conjunction state When, the bottom end facial planes 312 of long elements 31 touches and is pressed on 521 shape of the second plane of the second mandrel 52 of the second shaft group 5 It is compressed at face contact, the top facial planes 311 of long elements 31 touches and be pressed on the part of the first mandrel 42 of first rotating shaft group 4 Duan Zhouyuan (third rank portion 424) forms line contact and compresses, and the week of first protrusion 321 on short 32 top of shape part and the first cam 41 Edge offsets, and the second protrusion 322 of short 32 bottom end of shape part is promoted to touch and press in second recess portion 511 on 51 top of the second cam It forming multiple spot or face contact compresses, the second mandrel 52 and the second cam 51 at this time can not be rotated by direct clamping lock, so that Second plate body 55 can not also rotate synchronously, and as in first rotating shaft group 4, only the first mandrel 42 is formed with 31 top of long elements at this time Line contact, thus rotated.

Also, the second is above-mentioned two plate body is more than the lid conjunction state of 180 degree to 360 degree with respect to overturning again, refer to Fig. 5 ~ 8 Shown, long elements 31 push up, the end plane 311,312 at bottom both ends touches the first plane 421 and second to the first mandrel 42 respectively The segment section periphery of mandrel 52, and make short shape part 32 top touch support the first cam 41 the first recess portion 412 state, with Dual clamping lock effect is formed at the two of first rotating shaft group 4；For example, when turn over 360 deg, the first mandrel of first rotating shaft group 4 42 and first cam 41 and the second shaft group 5 the second mandrel 52 and the second cam 51 rotated relative to positioning board group 2 The bottom end facial planes 312 of 180 degree, long elements 31 touches and compresses segment section periphery (fourth order portion 524) shape of the second mandrel 52 It is compressed at line contact, the top facial planes 311 of long elements 31 touches and compresses the first plane 421 of the first mandrel 42 with forming face Contact compresses, and the second protrusion 322 of short 32 bottom end of shape part and the periphery of the second cam 51 offset, and promote short 32 top of shape part First protrusion 321, which is touched and pressed in first recess portion 412 on postrotational first cam, 41 top, forms multiple spot or face contact It compresses, the first mandrel 42 and the first cam 41 at this time can not be rotated by direct clamping lock, so that the first plate body 45 also can not It rotates synchronously, as in the second shaft group 5, only the second mandrel 52 is contacted with 31 bottom end of long elements formation line at this time, thus is able to Rotation.

In addition, alternately there are also another preferred embodiments for switching overturning structure 1 for twin shaft of the present invention, refer to the institute of Fig. 9 ~ 16 Show, be with the difference characteristic of above-described embodiment: first rotating shaft group 4 is also further radially recessed in the bottom end of the first cam 41 There is one first arc to lack portion 415, the top of the first cam 41 has one first arc protrusion 411 of radially protruding, 412 shape of the first recess portion At in the periphery top of the first arc protrusion 411, so as to by the top of short shape part 32 correspond to the first arc lack portion 415 and from first The periphery of cam 41.In addition to further, being also arranged in two shaft groups, as this second turn other than the setting of one shaft group Axis group 5 is also further radially recessed with one second arc in the bottom end of the second cam 51 and lacks portion 515, and the top of the second cam 51 has One second arc protrusion 511 of radially protruding, the second recess portion 512 are formed in the periphery top of the second arc protrusion 511, so as to by short shape The bottom end of part 32 is corresponding to the scarce portion 515 of the second arc and from the periphery of the second cam 51.It is anti-, it can also first allow the second cam 51 Top, bottom both ends be respectively provided with the second arc protrusion 511 and the second arc and lack portion 515, rear top, the bottom in need for allowing the first cam 41 again Both ends are respectively provided with the first arc protrusion 411 and the first arc lacks portion 415.

So during a mandrel wherein is rotated together with the cam that its axis connects, the top of short shape part 32 or bottom end meeting The arc for corresponding to cam lacks portion and will not temporarily touch the periphery of cam, is generated with reducing friction, until working as the top of long elements 31 End or bottom end leave the segment section periphery (third rank portion 424 or fourth order portion 524) of mandrel and do not touch the plane (the of mandrel One plane 421 or the second plane 521) during, the periphery of the cam is touched (i.e. in top or bottom end connecting through short shape part 32 The arc protrusion periphery of cam), reducing mandrel (such as reduces when rotation affecting between long elements 31 because gap generates The probability for causing positioning board group 2 that skew occurs after overturning due to the first interval 33 generates influences), to continue to long and short shape part Until 31,32 touch and press on respectively in the plane of mandrel and the recess portion of cam.

Among the above, after the scarce portion of the first arc has been respectively adopted in each cam, the second arc lacks portion's implementation, in order in effective space The effect and also further limit because gap generation is affected that middle reinforcement limits, the side of positioning board group 2 is additionally provided with one First limiting section 24 and one second limiting section 25, long groove 23 between the first limiting section 24 and the second limiting section 25, such as Shown in Fig. 9, with two respectively with the outwardly extending arc in direction far from the side on the same side of the first side plate 21 Shape convex block, two convex blocks are respectively as the first limiting section 24 and the second limiting section 25, and the first limit position 24 is in long groove 23 A upper side, the second limiting section 25 is located at below the other side of long groove 23.

And it is the first arc protrusion 411 is fan-shaped and radially protruding is in the periphery of the first cam 41, and make the first arc protrusion 411 one side is as the first stopper section 413, and the another side of the first arc protrusion 411 is as the second stopper section 414, then by One recess portion 412 is set to the periphery top of the first arc protrusion 411, and the scarce portion 415 of the first arc is fan-shaped and radial recessed convex in first The periphery of wheel 41；Further, it the thickness through reduction cam itself and reclines and positions the upper half of the side of board group 2, make the First arc is further lacked portion 415 and the first arc protrusion 411 on the path of same circular motion by one cam 41, first During shaft group 4 rotates, so that the first limiting section 24 is located at the first arc and lack in portion 415 and form phase with the first arc protrusion 411 To angle displacement.

It is again that the second arc protrusion 511 is fan-shaped and radially protruding is in the periphery of the second cam 51, and make the second arc protrusion 511 One side as third stopper section 513, the another side of the second arc protrusion 511 is as the 4th stopper section 514；Second recess portion 512 are set to the periphery top of the second arc protrusion 511, and to lack portion 515 fan-shaped and radial recessed in the second cam 51 for the second arc Periphery；Further, the lower half of the side of the thickness through reduction cam itself and the positioning board group 2 that reclines, makes second convex Second arc is further lacked portion 515 and the second arc protrusion 511 on the path of same circular motion by wheel 51, in the second shaft During 5 rotation of group, so that the second limiting section 25 is located at the second arc and lack in portion 515, and form relative angle with the second arc protrusion 511 Degree displacement.

For example, as shown in Figure 13,14, in above-mentioned lid conjunction state, the first mandrel 42 and the first cam 41 can be certainly Turn, while allowing the first plate body 45 to overturn 180 degree relative to the second plate body 55, and support in the second stopper section 414 of the first cam 41 When pressing the side of the first limiting section 24, reach limit effect and can not continue to rotate, at this point, the top surface of long elements 31 and first turn One first interval 33, first protrusion 321 on short 32 top of shape part are formed between first plane 421 of the first mandrel 42 of axis group 4 One second interval 34, the first interval 33 phase at a distance from the second interval 34 are formed between the first recess portion 412 of the first cam 41 Deng the space moved up so as to providing sliding shoe 3.And it is as shown in Figure 15,16, due to moving up for sliding shoe 3, Ji Kerang Second mandrel 52 and the rotation restriction cancellation of the second cam 51 and can be with rotation, user rotates the second plate body 55, and is overturning 180 degree, that is, make the second plate body 55 relative to 45 turn over 360 deg of the first plate body after, pass through the second arc of the second cam 51 4th stopper section 514 of protrusion 511 compresses the side of the second limiting section 25, achievees the effect that limit.And rotating backward second Plate body 55, it is sequentially another by the second stop surface 513 of the second cam 51 and the second limiting section 25 when being rotated further by the first plate body 45 The blocking of side, the blocking of 24 other side of the first stop surface 413 and the first limiting section of the first cam 41 can then allow the first plate body 45 The state closed in lid is replied relative to the second plate body 55.

Therefore, the present invention has the advantage that

1, the present invention mainly has two groups of alternating switching constructions, and one preferred embodiment is by two groups of alternating switching constructions through one The long and short shape part of sliding shoe is connected together, and long and short shape part is made to form different contact to the mandrel and cam of each shaft group respectively Mode, to form the synchronous card that floats in the case where traditional stop configurations (the stop tab collocation mutual backstop of stop block) is not used The effect of lock, and mutually compensate each other during alternately switching action because of influence caused by gap, it helps reduce zero group Part.

2, the present invention mainly has two groups of alternating switching constructions, and another preferred embodiment is with wherein the 1st group will be traditional Stop configurations are combined together with cam structure, the not only processing easy to manufacture in conjunction with after, effectively shorten axial length, and then are reduced Overall volume, the effect of also remaining backstop and clamping lock；And the 2nd group of alternating switching action is then that direct center roller carries out clamping lock, Clamping lock effect is not only helped, it also can be in two groups of alternating switching constructions wherein one group of clamping lock less effective, through another group Clamping lock effect with maintain alternately inverting action.

3, the present invention has two groups of alternating switching constructions, exists wherein the long elements of one group of alternating switching construction are concealed protection In the long groove for positioning the first side plate of board group, therefore, it is possible to prevente effectively from foreign matter or External force interference with maintain to act it is smooth and Prolong the service life.

In conclusion the present invention really can reach expected purpose according to content disclosed above, providing a kind of can effectively contract Subtract overall volume, the twin shaft for reducing production cost, and product quality capable of being improved to prolong the service life alternately switching overturning structure.

Claims

1. alternately switching overturns structure to a kind of twin shaft characterized by comprising

One positions board group, has a long groove in one side；

One sliding shoe, including a long elements and a short shape part, the long elements are can be contained in the long groove in a manner of opposite sliding It is interior, and end plane is respectively provided at the top of the long elements, bottom both ends；

One first rotating shaft group is located at including coaxial and one first cam that can be rotated synchronously and one first mandrel, first cam The top of the short shape part and have one first recess portion；First mandrel is pivotally connected the upper half of the positioning board group and is located at the long elements Top, the segment section periphery top of first mandrel has one first plane；And

One second shaft group is located at including coaxial and one second cam that can be rotated synchronously and one second mandrel, second cam The bottom end of the short shape part and have one second recess portion；Second mandrel is pivotally connected the lower half of the positioning board group and is located at the long elements Bottom end, the segment section periphery top of second mandrel has one second plane；Whereby on the long elements top, the end at bottom both ends Plane touches part segment section periphery and the second plane of second mandrel and the bottom of the short shape part to first mandrel respectively The state of the second recess portion of second cam is supported in end touching；Or the end plane on the long elements top, bottom both ends touch respectively support this The of first cam is supported in the touching of the top of first plane of one mandrel and the segment section periphery of second mandrel and the short shape part The state of one recess portion；Each state can allow a shaft group to rotate and make another shaft group stop.

2. alternately switching overturns structure to twin shaft as described in claim 1, which is characterized in that the side upper half of the positioning board group It is also further provided with one first limiting section, and the first rotating shaft group is also further radially recessed in the bottom end of first cam One first arc lacks portion, corresponding to short shape part top and make the periphery of the short shape part and first cam mutually from first cam Top there is one first arc protrusion of radially protruding, the side of the first arc protrusion has one first stopper section, for compressing this The other side of the side of first limiting section, the first arc protrusion has one second stopper section, for compressing the another of first limiting section Side is rotated to the backstop first rotating shaft group, and first recess portion is made to be formed in the periphery top of the first arc protrusion.

3. alternately switching overturns structure to twin shaft as described in claim 1, which is characterized in that the side lower half of the positioning board group It is also further provided with one second limiting section, and the second shaft group is also further radially recessed in the bottom end of second cam One second arc lacks portion, corresponding to short shape part bottom end and make the periphery of the short shape part and second cam mutually from second cam Top there is one second arc protrusion of radially protruding, the side of the second arc protrusion has a third stopper section, for compressing this The other side of the side of second limiting section, the second arc protrusion has one the 4th stopper section, for compressing the another of second limiting section Side is rotated to backstop the second shaft group, and second recess portion is made to be formed in the periphery top of the second arc protrusion.

4. alternately switching overturns structure to twin shaft as claimed in claim 2 or claim 3, which is characterized in that under the side of the positioning board group Half portion or the upper half are also further provided with one second limiting section or one first limiting section, and the long groove is made to be located at first limiting section And between second limiting section.

5. alternately switching overturns structure to twin shaft as claimed in claim 4, which is characterized in that the positioning board group includes being parallel to each other One first side plate and one second side plate, first mandrel simultaneously be pivotally connected first side plate the upper half and second side plate it is upper Half portion, second mandrel are pivotally connected the lower half of first side plate and the lower half of second side plate simultaneously, first limiting section and Second limiting section is two convex blocks set on the first side plate side, which is formed in the side of first side plate.

6. alternately switching overturns structure to twin shaft as described in claim 1, which is characterized in that the segment section periphery of first mandrel Bottom end also has a third rank portion and a third plane, so that the length of the third plane is less than the length of first plane, and make First camshaft is connected at the third rank portion of first mandrel, and when first central axis, and the third plane is elongated with this The top of part is in the state that will not be in contact.

7. alternately switching overturns structure to twin shaft as described in claim 1, which is characterized in that the segment section periphery of second mandrel Bottom end also has a fourth order portion and a fourth plane, so that the length of the fourth plane is less than the length of second plane, and make Second camshaft is connected at the fourth order portion of second mandrel, and when second central axis, the fourth plane is elongated with this The bottom end of part is in the state that will not be in contact.

8. alternately switching overturns structure to twin shaft as claimed in claim 1 or 2, which is characterized in that the top of the short shape part has One first protrusion, first recess portion and first protrusion have complementary shape size.

9. alternately switching overturns structure to twin shaft as claimed in claim 1 or 3, which is characterized in that the bottom end of the short shape part has One second protrusion, second recess portion and second protrusion have complementary shape size.

10. twin shaft as described in claim 1 alternately switching overturning structure, which is characterized in that the upper half of the positioning board group and Lower half has axially penetrated through a circular hole respectively, runs through and is pivotally connected for the first mandrel and the second mandrel respectively, and by upper and lower half Top, the bottom both ends of each circular hole and long groove are respectively communicated with.