CN202338736U - Support device - Google Patents

Abstract

The utility model discloses a support device, which is arranged on a working surface and is used for supporting a screen. The support device comprises a connecting unit, a seat body, and an adjusting unit in a first or section operating state, wherein the connecting unit comprises a sliding wall on which a sliding hole is formed; the adjusting unit comprises a connecting piece and a base; the two ends of the connecting piece take a first pivot shaft and a second pivot shaft as shafts respectively, and can pivot relative to the sliding hole and the seat body respectively; the base takes a third pivot shaft as a shaft, and can pivot relative to the connecting unit; in the first operating state, the second and third pivot shafts are overlapped, an included angle between the connecting unit and the connecting piece is kept constant, and the connecting unit and the connecting piece can pivot synchronously; and in the second operating state, the second and third pivot shafts are separated, the included angle between the connecting unit and the connecting piece is reduced along with leaving of the third pivot shaft away from the second pivot shaft, and the first pivot shaft is moved from one end of the sliding hole to the other end of the sliding hole.

Description

Support device

Technical field

The utility model relates to a kind of support device, and is particularly related to a kind of support device in order to the support screen.

Background technique

Existing support device; As shown in Figure 1; The support arm 12a and one that one basal disc 11a, is installed in this basal disc 11a top is journaled into the board 13a of the tip portion 121a of this support arm 12a; This board 13a combines in order to provide to set up with a screen 14a, and makes said screen 14a support arm 12a adjustment use angle relatively.Yet such design, the screen 14a angle that can adjust is limited, and can't adjust screen 14a height, and is only applicable to use when the user views and admires screen 14a.

Yet,, also increased the function of online and touch control operation because the universalness gradually of touch control screen makes screen except as viewing and admiring the use.When using screen online or touch control operation; Existing support device only can rotate around the pivot joint position of support arm 12a and board 13a; And this height that articulates the position is fixed; That is existing support device and can't cooperate human body operation posture miscellaneous and do the adjustment on the height, and then cause the user to produce fatigue easily because of inappropriate operation posture.

Summary of the invention

The purpose of the utility model is to provide a kind of support device, and it provides the screen of institute's support to adjust down or under the state at Low angle visual angle in the state at high angle visual angle, to meet user's demand.

The utility model embodiment provides a kind of support device, and in order to be arranged at a working surface and support one screen, this support device comprises: a linkage unit, and it is in order to fixing this screen, and this linkage unit has a sliding wall, and this sliding wall is formed with a sliding eye; One pedestal, it is arranged on this working surface; An and regulation unit; It optionally is in one first serviceability and one second serviceability; This regulation unit comprises: a connection piece, the one of which end is located at the sliding eye of this linkage unit movably, and with one first pivotal axis serve as axle and can be relatively this sliding eye pivot; The other end of this link connects this pedestal, and serves as axle and this pedestal pivot relatively with one second pivotal axis; One base is arranged on this working surface, and this base connects this linkage unit, and this base serves as axle and this linkage unit pivot relatively with one the 3rd pivotal axis; Wherein, In this first serviceability, this second pivotal axis and the 3rd pivotal axis are overlapping, and the angle of this linkage unit and this link keeps definite value and the ability pivot in unison; In this second serviceability; The 3rd pivotal axis separates with this second pivotal axis, and the angle of this linkage unit and this link is along with the 3rd pivotal axis dwindles away from this second pivotal axis, and this first pivotal axis is adjusted to the other end from an end that is positioned at this sliding eye.

Preferably, this pedestal is formed with a breach, and in this first serviceability, this base is placed in this breach.

Preferably, this pedestal comprises a substrate and a folded plate, and this edge of substrate emargination is established and is formed with a breach; This folded plate forms from the position bending extension that this substrate is positioned at this breach one side; The other end of this link is connected in the folded plate of this pedestal pivotly, and this base includes a base plate and side plate, and this base plate profile is roughly corresponding to this breach; This side plate forms from the end extension of this base plate corresponding to this folded plate, and the side plate of this base is connected in this linkage unit pivotly.

Preferably; This folded plate is formed with the rotation hole of an arc, and this second pivotal axis roughly is positioned at the home position of the arc that rotation hole constituted of this folded plate, and this regulation unit includes a latch; This latch is fixed in this link, and this latch is arranged in the rotation hole of this folded plate.

Preferably, the side plate of this base is formed with an arcuate socket, and roughly corresponding to the rotation hole of this pedestal, in this first serviceability, this latch is arranged in the arcuate socket of this side plate to the arcuate socket of this base.

Preferably, this regulation unit includes a location fastener, and this location fastener is fixed on this folded plate, and in this second serviceability, this latch is positioned this location fastener.

Preferably; This location fastener is formed with a base portion, two adjutages, two stuck points, reaches a spacing space; Said two adjutages form towards homonymy and oblique away from each other extension from this base portion, and inner edge forms towards direction extension respect to one another and said two stuck points are respectively from the top of said two adjutages, and this spacing space is formed by said two adjutages and the encirclement of said two stuck points; This base portion is fixed on this folded plate; And the distance between said two stuck points is less than the distance between its pairing this rotation hole sidewall, and in this second serviceability, this latch is positioned this spacing space.

Preferably, in this load-bearing member central position of this first serviceability and the distance between this working surface greater than the distance between this load-bearing member central position that is in this second serviceability and this working surface.

Preferably, in this load-bearing member central position of this second serviceability and the distance between this working surface along with the 3rd pivotal axis dwindles away from this second pivotal axis.

Preferably, in this second serviceability, this base is located away from this pedestal movably along this working surface.

In sum; The support device that the utility model embodiment is provided optionally is in first serviceability and second serviceability through regulation unit; Make the screen of support device institute support can be in the high angle visual angle of first serviceability; Perhaps make screen be positioned at second serviceability, and can further to be positioned at the Low angle visual angle, can just change according to user's different demands thereupon to make screen towards user's direction.

Description of drawings

Fig. 1 is the schematic perspective view of existing support device;

Fig. 2 is the schematic perspective view of the utility model support device in second serviceability;

Fig. 3 is the perspective exploded view of Fig. 2;

Fig. 4 is another perspective exploded view of Fig. 2;

Fig. 5 is the another perspective exploded view of Fig. 2;

Fig. 6 is the schematic perspective view of the utility model support device in first serviceability;

Fig. 7 is the partial schematic sectional view of Fig. 6;

Fig. 8 is equiped with screen for the utility model support device and is in the schematic perspective view of first serviceability; And

Fig. 9 is equiped with screen for the utility model support device and is in the schematic perspective view of second serviceability.

Wherein, description of reference numerals is following:

The 11a basal disc

The 12a support arm

The 121a tip portion

The 13a board

The 14a screen

1 linkage unit

11 load-bearing members

111 bearing walls

112 sliding walls

1121 sliding eyes

113 articulate wall

1131 pivoted holes

114 wall extensions

115 positioning plates

12 sliders

121 slide plates

1211 perforation

122 sliding pins

123 locating columns

13 elastic components

131 extension springs

2 pedestals

21 substrates

22 folded plates

221 rotation holes

222 fixed holes

23 breach

3 regulation units

31 links

311 link arms

3111 perforation

3112 perforation

312 support arms

3121 perforation

32 latches

33 location fasteners

331 base portions

332 adjutages

333 stuck points

334 spacing spaces

34 bases

341 base plates

342 side plates

3421 containing grooves

3422 assembly holes

3423 arcuate sockets

3424 perforations

35,35 ' fixing-assembly

351,351 ' screw

352,352 ' nut

353,353 ' torsion washer sets

4 working surfaces

5 screens

R1 first pivotal axis

R2 second pivotal axis

R3 the 3rd pivotal axis

D1 first distance

The D2 second distance

θ 1 first angle

θ 2 second angles

Embodiment

For further understanding the characteristic and the technology contents of the utility model, see also following detailed description and accompanying drawing, yet accompanying drawing only provides reference and explanation about the utility model, be not to be used for the interest field of the utility model is done any restriction.

See also shown in Figure 2ly, the utility model provides a kind of support device, in order to be arranged on the working surface 4 (as: desktop).Said support device comprises: a linkage unit 1, a pedestal 2 and a regulation unit 3.Moreover Fig. 3 to Fig. 5 of present embodiment is the part decomposing schematic representation of Fig. 2, is set forth in when consulting Fig. 3 to Fig. 5 down, please with reference to shown in Figure 2.

Consult shown in Figure 3ly, above-mentioned linkage unit 1 comprises a load-bearing member 11, a slider 12, an and elastic component 13.

Said load-bearing member 11 is formed with two tabular bearing walls 111; Vertically bend two sliding walls 112 that extend to form respectively by above-mentioned two bearing walls, 111 corresponding inner edges; The two pivot joint walls 113 that extend to form from above-mentioned two sliding walls, 112 1 ends respectively; Extend to a wall extension 114 of another sliding wall 112 the other ends from one of them sliding wall 112 the other end of above-mentioned two sliding walls 112; And be fixed in the relative inner edge of above-mentioned two sliding walls 112 and be adjacent to above-mentioned two articulate walls 113 a U-shaped positioning plate 115.

Wherein, said two sliding walls 112 respectively offer a sliding eye 1121, and above-mentioned sliding eye 1121 is microscler and between wall extension 114 and positioning plate 115.That is the long axis direction of sliding eye 1121 is parallel to the long axis direction of sliding wall 112.And said two pivot joint walls 113 respectively are formed with a pivoted hole 1131.

Said slider 12 can slide with respect to the sliding wall of load-bearing member 11 112, and slider 12 has two groups of slide plates 121, four sliding pins 122 and a locating column 123, and above-mentioned slide plate 121 is the microscler and length length less than sliding eye 1121 long axis directions.Avoid accompanying drawing too complicated, Fig. 3 only presents one group of slide plate 121 and two sliding pins 122 that are positioned at the figure left side.

Wherein, Both sides and shaded portions sliding eye 1121 that each group slide plate 121 has three slide plates 121 and is arranged at each sliding wall 112 respectively; With the direction of Fig. 3, the slide plate 121 of left bottom is a metal material, and all the other two slide plates 121 are plastic material; And be that slide plate 121 with plastic material is in abutting connection with this sliding wall 112, to reduce frictional loss.The two end part of each slide plate 121 respectively are formed with a perforation 1211 corresponding to sliding eye 1121; And the two end part perforation 1211 and the pairing sliding eye 1121 thereof of each group slide plate 121 are equipped with a sliding pin 122 respectively, to be slidedly arranged on its set sliding wall 112 via sliding pin 122.Said locating column 123 wherein is arranged in the sliding pin 122 of above-mentioned two groups of slide plates, 121 contiguous wall extensions 114 between above-mentioned two sliding walls 112, be arranged in the two ends of locating column 123 further.

Said elastic component 13 is an extension spring 131, but when practical application, not as limit.The two ends of above-mentioned extension spring 131 are individually fixed in the positioning plate 115 of load-bearing member 11 and the locating column 123 of slider 12.

See also shown in Figure 4ly, said pedestal 2 comprises a substrate 21 and two relative folded plates 22.Wherein, aforesaid substrate 21 supplies to be arranged on the working surface 4 and substrate 21 ora terminalis are arranged with and are formed with a breach 23, and above-mentioned two folded plates 22 respectively from position that substrate 21 is positioned at breach 23 relative both sides vertically towards forming with the lateral buckling extension.And said two folded plates 22 respectively are formed with a rotation hole 221 and a fixed hole 222 in corresponding position.Likewise for avoiding accompanying drawing too complicated, Fig. 4 only presents a folded plate 22 that is positioned at the figure left side.

With reference to Fig. 4 and shown in Figure 5, above-mentioned regulation unit 3 comprises two links 31, two latches 32, two location fastener 33, a base 34 and four fixing- assemblys 35,35 '.Wherein, said four fixing-assemblys 35,35 ' are two fixing-assemblys 35 and two fixing-assemblys 35 ', and respectively include a screw 351,351 ', one nut 352,352 ' and one torsion washer sets 353,353 '.

Likewise for avoiding accompanying drawing too complicated, Fig. 4 and Fig. 5 only present a connection piece 31, the latch 32, that are positioned at the figure left side and locate fastener 33, reach two fixing-assemblys 35,35 '.

Said two links 31 are tabular and respectively include a link arm 311 and extend the support arm 312 from above-mentioned link arm 311.

Wherein, an end of above-mentioned two link arms 311 is formed with a perforation 3111 respectively, wears for sliding pin 122, uses an end that makes said two link arms 311 and is connected in the end outside of said two groups of slide plates 121 away from locating column 123 pivotly.And an end of said two link arms 311 serves as an axle and pivoting with respect to load-bearing member 11 with one first pivotal axis R1.

And the other end of above-mentioned two link arms 311 is formed with a perforation 3112 respectively; Wear after passing folded plate 22 fixed holes 222 from inside to outside for a screw 351, so that the other end of said two link arms 311 is connected in two folded plates, 22 outsides of pedestal 2 pivotly.And the other end of said two link arms 311 serves as an axle and pivoting with respect to pedestal 2 with one second pivotal axis R2.

The position (that is fixed hole 222) that said folded plate 22 is connected in link arm 311 roughly is positioned at the home position of the arc that the rotation hole 221 of folded plate 22 constituted.In other words, the home position of the arc that constituted of the rotation hole 221 of the said second pivotal axis R2 through folded plate 22.

Moreover; Said two torsion washer sets 353 are arranged at the outside of above-mentioned two folded plates 22 respectively; And be attached to the position that said two link arms 311 link to each other with two folded plates 22 with the nut 352 of above-mentioned screw 351 and collocation thereof respectively, and the center of above-mentioned two torsion washer sets 353 all is positioned on the second pivotal axis R2.And said support arm 312 respectively from the other end of above-mentioned link arm 311 direction towards rotation hole 221 extend form.

Said two support arms 312 respectively are formed with a perforation 3121 corresponding to the position of rotation hole 221; And said two latches 32 are arranged in support arm 312 perforation 3121 of above-mentioned two links 31 respectively and pass two rotation holes 221 of pedestal 2, and latch 32 can move along rotation hole 221.

Said two location fasteners 33 are tabular and respectively are formed with a base portion 331, two adjutages 332, two stuck points 333 and a spacing space 334.Wherein, Above-mentioned two adjutages 332 from base portion 331 towards homonymy and away from each other the oblique extension of direction form; Inner edge forms towards direction extension respect to one another and above-mentioned two stuck points 333 are respectively from the top of said two adjutages 332, and surrounds the above-mentioned spacing space 334 of formation between said two adjutages 332 and two stuck points 333.

Each location fastener 33 is located in 22 of support arm 312 and folded plates, and its base portion 331 is fixed on the folded plate 22, wherein, and stuck point 333 cover part rotation holes 221.That is the distance between two stuck points 33 of each location fastener 33 uses forming a general alleged design of crossing less than the distance between its pairing rotation hole 221 sidewalls.

The biside plate 342 that said base 34 includes a base plate 341 and extends from base plate 341 both sides respectively.

Wherein, said base plate 341 is arranged on the working surface 4, and the position of the contiguous pedestals 2 of base plate 341, and its profile is roughly corresponding to substrate 21 breach 23 of pedestal 2.And said biside plate 342 vertically forms towards the homonymy extension from base plate 341 relative two ends respectively.

And an end of above-mentioned biside plate 342 is formed with a perforation 3424 respectively; Wear from outside to inside for a screw 35 '; And above-mentioned screw 35 ' and then be arranged in the pivoted hole 1131 that articulates wall 113 articulates walls 113 so that an end of said biside plate 342 is connected in two of said load-bearing member 11 pivotly.And an end of said biside plate 342 serves as an axle and pivoting with respect to load-bearing member 11 with one the 3rd pivotal axis R3.In addition, the long axis direction of above-mentioned sliding eye 1121 is described further and defines at this, that is the long axis direction of the sliding eye 1121 of above-mentioned sliding wall 112 is to extend towards the 3rd pivotal axis R3 direction from the first pivotal axis R1.

Say in more detail; Said biside plate 342 in against each other away from outer side surface on respectively be concaved with a containing groove 3421; Said containing groove 3421 is communicated in above-mentioned perforation 3424 and extends to side plate 342 away from the edge that articulates wall 113, uses the positions that supply screw 351 to be positioned at folded plate 22 inboards and moves on the 3rd pivotal axis R3 along containing groove 3421.Said biside plate 342 respectively is arranged with the assembly hole 3422 that is formed with a level away from the edge that articulates wall 113 and is communicated in an arcuate socket 3423 of assembly hole 3422.Above-mentioned assembly hole 3422 also is communicated in containing groove 3421 with arcuate socket 3423, and the shape of arcuate socket 3423 is roughly corresponding to folded plate 22 formed rotation hole 221 shapes.

In addition, when practical application, side plate 342 also can only be concaved with arcuate socket 3423 in its edge, and does not form assembly hole 3422, to dwindle the size of base 34.

And said two torsion washer sets 353 ' are arranged at the inboard of above-mentioned biside plate 342 respectively; And be attached to the position that said biside plate 342 links to each other with two folded plates 22 with the nut 352 ' of above-mentioned screw 351 ' and collocation thereof respectively, and the center of above-mentioned two torsion washer sets 353 ' all is positioned on the 3rd pivotal axis R3.

Through above-mentioned annexation, regulation unit 3 optionally is in one first serviceability (as shown in Figure 6) and one second serviceability (as shown in Figure 2).Moreover the present embodiment support device can be in order to support one screen 5 (like Fig. 8 and shown in Figure 9) when using, that is with bearing wall 111 fixed masks 5 of load-bearing member 11.With this, support device can be via regulation unit 3 so that screen 5 is adjusted in above-mentioned first serviceability or second serviceability, and then make screen 5 be adjusted to the position that is fit to the user.

Say in more detail; See also Fig. 6 and shown in Figure 7; When first serviceability; Distance definition between load-bearing member 11 central positions and the working surface 4 is one first distance B 1 (as shown in Figure 8), and the angle between the link arm 311 of link 31 and the sliding wall 112 of load-bearing member 11 is defined as one first angle theta 1.

Moreover when first serviceability, latch 32 is to be arranged in rotation hole 221 and the arcuate socket 3423, and latch 32 can move freely in rotation hole 221 and arcuate socket 3423.The base plate 341 of base 34 is placed in substrate 21 breach 23 of pedestal 2, and the position of said two-screw 35 between biside plate 342 is placed in respectively in the containing groove 3421 of said biside plate 342.

At this moment, the second pivotal axis R2 and the 3rd pivotal axis R3 are overlapping, and first angle theta 1 keeps definite value (being roughly 180 degree).Therefore, under first serviceability, the pedestal 2 of support device can not produce with respect to working surface 4 with base 34 and move.In other words; The bottom position of support device is motionless; Said load-bearing member 11 is able to the second pivotal axis R2 with link 31 and pivots for axle and in the inter-sync of special angle scope, and said special angle scope roughly is equal to the angle of the central angle of the arc that rotation hole 221 constituted.

Wherein, when load-bearing member 11 pivoted in first serviceability, slider 12 did not move along sliding eye 1121, that is above-mentioned first angle theta 1 keeps definite value.But when load-bearing member 11 pivots around the second pivotal axis R2, load-bearing member 11 will drive link 31, make link 31 rotate and drive latch 32, move in rotation hole 221 and arcuate socket 3423 to make latch 32.And load-bearing member 11 is when rotating, said torsion washer sets 353,353 ' will along with the rotation of load-bearing member 11 to adjust the torque magnitude that it is produced, produce with stopping effect with the gravity of opposing load-bearing member 11 (or load-bearing member 11 and carrying object thereof).

Therefore; When support device support screen 5 and when being in first serviceability (as shown in Figure 8); The bottom position of screen 5 can not produce with respect to working surface 4 and move; When screen 5 served as the axle pivot with the second pivotal axis R2, screen 5 was adjusted screen 5 visual angles (high angle visual angle) under the state that keeps clear of the user.

But when regulation unit 3 desires to be adjusted to second serviceability by first serviceability (Fig. 6 is toward Fig. 2 adjustment), that is screen 5 is by the high angle visual angle state of Fig. 8 during toward the Low angle visual angle state adjustment of Fig. 9.Load-bearing member 11 makes it pivot around the second pivotal axis R2 downwards with stressed; And link 31 will receive load-bearing member to carry part 11 drivings; And then interlock latch 32, make its along rotation hole 221 to lower slider, and through the location fastener 33 stuck point 333 to be positioned in the spacing space 334.

Wherein, when latch 32 desires were passed through stuck point 333, the user had the sensation that is hindered, and must the application of force make latch 32 through stuck point 333 (crossing a design) with the prompting user, made latch 32 be positioned in the spacing space 334.

Thereafter; When latch 32 is positioned in the spacing space 334, limited because of below (and left and right-hand), cause link 31 to pivot again downwards; Make load-bearing member 11 can't be again serve as axle and pivoting downwards with the second pivotal axis R2, and then force load-bearing member 11 to produce to move with respect to link 31.At this moment; Base 34 will be driven by load-bearing member 11; Base 34 will be moved towards the direction away from pedestal 2; And then the base plate 341 that makes base 34 moves away substrate 21 breach 23 of pedestal 2, and the side plate 342 of base 34 will be separated from each other with latch 32, so that regulation unit 3 is in said second serviceability.

As shown in Figure 2; When second serviceability; Distance definition between load-bearing member 11 central positions and the working surface 4 is a second distance D2 (as shown in Figure 9), and the angle between the link arm 311 of link 31 and the sliding wall 112 of load-bearing member 11 is defined as one second angle theta 2.

Moreover when regulation unit 3 during in second serviceability, because latch 32 can't be in moving along rotation hole 221, when therefore forcing in load-bearing member 11 downwards, load-bearing member 11 produces with respect to link 31 and moves, and the second distance D2 and second angle theta 2 are dwindled.And making it separate pedestal 2 along working surface 4 through the base 34 that moves and then drive of load-bearing member 11, this moment, load-bearing member 11 was equivalent to around the 3rd pivotal axis R3 pivot moving.Wherein, the 3rd pivotal axis R3 from the distance of first and second pivotal axis R1, R2 along with base 34 increases away from pedestal 2.

Moreover, because producing with respect to link 31, moves load-bearing member 11, so that the sliding eye 1121 on the sliding wall 112 can move with respect to the first pivotal axis R1, make the first pivotal axis R1 be adjusted to the other end from an end that is positioned at sliding eye 1121 passively.That is, because moving of sliding wall 112 makes slider 12 be adjusted to the other end from an end that is positioned at sliding eye 1121 passively, and then elongate extension spring 131.And said torsion washer sets 353,353 ' will change the torque magnitude that it produces, and produce with stopping effect with the gravity of opposing load-bearing member 11 (or load-bearing member 11 and carrying object thereof).

First distance B 1 and first angle theta 1 when wherein, the second distance D2 during second serviceability and second angle theta 2 are respectively less than first serviceability.In other words, far away more when base 34 body 2 that disseats, then the second distance D2 and second angle theta 2 will be more little, that is the angle of inclination of load-bearing member 11 and central position height be interlock each other.

Therefore; When support device support screen 5 and when being in second serviceability (as shown in Figure 9); The bottom position of screen 5 can produce with respect to working surface 4 and move, that is the bottom position of screen 5 can move towards user's direction; And under the situation of second distance D2, provide the low-angle screen of user 5 visual angles less than first distance B 1.

In addition, the present embodiment support device also can be installed in the electronic product that screen needs flip angle, as: products such as notebook computer, mobile phone or e-book, contain wider use angle with the screen that this electronic product is provided.And support device be installed in the mode of electronic product can be according to the type of electronic product change thereupon, do not exceed with the assembled configuration of present embodiment support device.For example: support device is also removable to be divided into two reciprocity parts, and this two part is installed in respectively in the housing of notebook computer both sides.

Moreover base 34 mobile routes in the present embodiment are example to be positioned at link 31 inboards, but when practical application, the mobile route of base 34 also can design in link 31 outsides.

Comprehensive, the utility model embodiment's support device makes the screen 5 of support device institute support can be in the high angle visual angle through the design of regulation unit 3 with linkage unit 1, and screen 5 can be furthered to be positioned at the Low angle visual angle towards user's direction.Moreover regulation unit 3 can reach with the effect of stopping it through torsion washer sets 353,353 ', and then makes screen 5 can tune to angle of inclination arbitrarily, and user's difference is viewed and admired or the demand of work angle to meet.

The above is merely the embodiment of the utility model, and it is not the claim in order to limitation the utility model.

Claims (10)

1. support device in order to be arranged at a working surface and support one screen, is characterized in that this support device comprises:

One linkage unit, it is in order to fixing this screen, and this linkage unit has a sliding wall, and this sliding wall is formed with a sliding eye;

One pedestal, it is arranged on this working surface; And

One regulation unit, it optionally is in one first serviceability and one second serviceability, and this regulation unit comprises:

A connection piece, the one of which end is located at the sliding eye of this linkage unit movably, and with one first pivotal axis serve as axle and can be relatively this sliding eye pivot, the other end of this link connects this pedestal, and serves as axle and this pedestal pivot relatively with one second pivotal axis;

One base is arranged on this working surface, and this base connects this linkage unit, and this base serves as axle and this linkage unit pivot relatively with one the 3rd pivotal axis;

Wherein, In this first serviceability, this second pivotal axis and the 3rd pivotal axis are overlapping, and the angle of this linkage unit and this link keeps definite value and the ability pivot in unison; In this second serviceability; The 3rd pivotal axis separates with this second pivotal axis, and the angle of this linkage unit and this link is along with the 3rd pivotal axis dwindles away from this second pivotal axis, and this first pivotal axis is adjusted to the other end from an end that is positioned at this sliding eye.

2. support device as claimed in claim 1 is characterized in that this pedestal is formed with a breach, and in this first serviceability, this base is placed in this breach.

3. support device as claimed in claim 1; It is characterized in that this pedestal comprises a substrate and a folded plate, this edge of substrate emargination is established and is formed with a breach; This folded plate forms from the position bending extension that this substrate is positioned at this breach one side; The other end of this link is connected in the folded plate of this pedestal pivotly, and this base includes a base plate and side plate, and this base plate profile is roughly corresponding to this breach; This side plate forms from the end extension of this base plate corresponding to this folded plate, and the side plate of this base is connected in this linkage unit pivotly.

4. support device as claimed in claim 3; It is characterized in that; This folded plate is formed with the rotation hole of an arc, and this second pivotal axis roughly is positioned at the home position of the arc that rotation hole constituted of this folded plate, and this regulation unit includes a latch; This latch is fixed in this link, and this latch is arranged in the rotation hole of this folded plate.

5. support device as claimed in claim 4 is characterized in that the side plate of this base is formed with an arcuate socket, and roughly corresponding to the rotation hole of this pedestal, in this first serviceability, this latch is arranged in the arcuate socket of this side plate to the arcuate socket of this base.

6. like claim 4 or 5 described support devices, it is characterized in that this regulation unit includes a location fastener, this location fastener is fixed on this folded plate, and in this second serviceability, this latch is positioned this location fastener.

7. support device as claimed in claim 6; It is characterized in that this location fastener is formed with a base portion, two adjutages, two stuck points and a spacing space, said two adjutages form towards homonymy and oblique away from each other extension from this base portion; Inner edge forms towards direction extension respect to one another and said two stuck points are respectively from the top of said two adjutages; This spacing space is formed by said two adjutages and the encirclement of said two stuck points, and this base portion is fixed on this folded plate, and the distance between said two stuck points is less than the distance between its pairing this rotation hole sidewall; In this second serviceability, this latch is positioned this spacing space.

8. support device as claimed in claim 1 is characterized in that, in this load-bearing member central position of this first serviceability and the distance between this working surface greater than the distance between this load-bearing member central position that is in this second serviceability and this working surface.

9. support device as claimed in claim 8 is characterized in that, in this load-bearing member central position of this second serviceability and the distance between this working surface along with the 3rd pivotal axis dwindles away from this second pivotal axis.

10. support device as claimed in claim 1 is characterized in that, in this second serviceability, this base is located away from this pedestal movably along this working surface.

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