CN201022484Y

CN201022484Y - Height adjustable lifting/lowering stand

Info

Publication number: CN201022484Y
Application number: CNU2007200485987U
Authority: CN
Inventors: 胡柱根
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-02-07
Filing date: 2007-02-07
Publication date: 2008-02-20
Anticipated expiration: 2017-02-07

Abstract

The utility model belongs to lifting frame technical field, in particular to a lifting frame which can be used in the furniture (such as tea table and chair) and can realize the height adjustment of furniture. The utility model comprises a base, an upper base and a telescopic supporter which is connected with the base and the upper base. A plurality of connection arms of the telescopic supporter is crossing articulated to form at least one movable quadrangle. The teeth which can be meshing mutually are constructed at the lower ends of the two lower connection arms of the lowest quadrangle. The lower ends of the two lower connection arms are both articulated with the base and the lower end of one lower connection arm therein is also provided with a height location groove. The pawl which cooperates with the height location groove is articulated with the base. The selector lever which is used to release the latches between the pawl and the height location groove is articulated with the lower end of the same lower connection arm. The utility model is simple in structure, convenient in use, and the furniture of adjustable height can be manufactured based on the structure to meet different using height needs, which can improve the practicality of the furniture.

Description

Adjustable for height crane

Technical field:

The utility model relates to the crane technical field, refers in particular to a kind of can be used for and can realize the crane of furniture Height Adjustment on the furniture (as tea table, chair etc.).

Background technology:

Known, the height of big portions such as the tea table of people's use at present, chair has highly been determined when promptly it dispatches from the factory, for non-adjustable for what fix.Yet when reality was used, because the difference of human body height, the different users need use the tea table of differing heights or chair could obtain comparatively comfortable sitting posture, thereby fixing tea table, the chair of present level is difficult to satisfy instructions for use.Have adjustable for height chair subsequently, it generally is to realize by hydraulic mechanism, not only the cost of manufacture height, and be not very convenient in use, especially descend timing to need bigger downforce to realize, general child or old man then be can not be completed at all, influence its serviceability.

Summary of the invention:

The purpose of this utility model is to provide a kind of mechanical ascending and descending frame, and it has multistage Height Adjustment, is incorporated into the adjustment that can realize differing heights on tea table or the chair.

For achieving the above object, adjustable for height crane described in the utility model, comprise base, the seat of honour and be connected in base and the seat of honour between expansion bracket, expansion bracket is constructed the quadrangle of an activity at least by many linking arm cross-articulation, wherein two linking arms of the top cross-articulation top of stretching out connects the seat of honour, at least be provided with the top slippage work that a sliding chute seat cooperates the one linking arm to stretch out on the seat of honour, also can be provided with the top slippage work that two sliding chute seats cooperate two linking arms to stretch out respectively; The lower end of the tetragonal two downside linking arms of below be configured with respectively can be intermeshing tooth portion, the lower end of two downside linking arms all is articulated on the base, also be provided with several height locating slots therein on the lower end of a downside linking arm, be articulated on the base with the ratchet of several height locating slot cooperatings, ratchet drives control by a torsion spring, and be used to remove the lower end that the shifting block that engages between ratchet and the height locating slot is hinged on same downside linking arm, also be provided with the confinement block of spacing shifting block up and down on the lower end of this downside linking arm.

Such scheme can further improve: convex with installation base on the base, the lower end of two downside linking arms and ratchet are installed on the same vertical plane of installation base.

Such scheme can further improve: one of at least therein the upper end of downside linking arm connects an extension spring that pulls and supports inwardly, and the other end of this extension spring is connected on the base.

Such scheme can further improve: be provided with an extension spring that laterally pulls and supports in the upper end of two downside linking arms.

Such scheme can further improve: described shifting block one end is hinged on the linking arm, the other end form an opening up collude groove, this colludes groove can collude the protruding pin of holding evagination on the ratchet just.

Such scheme can further improve: the torsion spring of described driving ratchet wherein one is turned round on the protruding pin that arm presses on ratchet, and another is turned round arm and then presses on the base.

Adopt said structure, the utlity model has following advantage: 1, utilize expansion bracket to realize the Height Adjustment at the seat of honour, satisfy the needs of differing heights, be combined with the tea table panel on the seat of honour or the chair seat can obtain adjustable for height tea table or chair, the convenient use.2, the lower end of the tetragonal two downside linking arms of below be configured with respectively can be intermeshing tooth portion, utilize the engagement of tooth portion to make the action of two linking arms synchronously, so that expansion bracket is steadily flexible, handling good.3, several height locating slots and click-fit realize multistage height location, and positioning stablity is structural good.4, simple in structure, making and easy to assembly, production cost is low.

Description of drawings:

Accompanying drawing 1 is the utility model structural representation;

Accompanying drawing 2 is the utility model partial structurtes schematic diagrames;

Accompanying drawing 3 is the utility model partial structurtes decomposing schematic representations;

Accompanying drawing 4 is the utility model contractive action schematic diagram;

Accompanying drawing 5 folds the structural representation of minimum altitude for the utility model.

The specific embodiment:

Below in conjunction with accompanying drawing the utility model is described further:

See shown in the accompanying drawing 1～5, adjustable for height crane described in the utility model, comprise base 1, the seat of honour 2 and be connected in base 1 and the seat of honour 2 between expansion bracket 3, expansion bracket 3 is constructed the quadrangle of an activity at least by many linking arms 31 cross-articulation, wherein two linking arms 31 of the top cross-articulation top of stretching out connects the seat of honour 2, is provided with the top slippage work that a sliding chute seat 21 cooperates one linking arms 31 to stretch out on the seat of honour 2 at least.The most tetragonal two downside linking arm 31a of below, the lower end of 31b is configured with respectively can the intermeshing tooth 32a of portion, 32b, two downside linking arm 31a, the lower end of 31b all is articulated on the base 1, also be provided with several height locating slots 33 therein on the lower end of a

downside linking arm

31a or 31b, cooperate the ratchet 4 of location work to be articulated on the base 1 with several height locating slots 33, ratchet 4 drives control by a torsion spring 5, and be used to remove the lower end that the shifting block 6 that engages between ratchet 4 and the height locating slot 33 is hinged on same

downside linking arm

31a or 31b, also be provided with the confinement block 7 of spacing shifting block 6 up and down on the lower end of this

downside linking arm

31a or 31b, last confinement block 7 can press down shifting block 6 when work, make shifting block 6 withdraw from effect ratchet 4, and confinement block 7 can be gone up top shifting block 6 when work down, makes shifting block 6 act on ratchet 4.

In the present embodiment, convex with installation base 11 on the base 1, the lower end of two

downside linking arm

31a, 31b and ratchet 4 are installed on the installation base 11 same vertical planes, can guarantee to install coplanarity like this, it is stable that the 32a of tooth portion, the 32b of two

downside linking arm

31a, 31b are meshing with each other, and moves smooth and easy.

At least therein one of the upper end of

downside linking arm

31a or 31b connects an extension spring that pulls and supports 8 inwardly, and the other end of this extension spring 8 is connected on the base 1.Utilize the interior to pulling force of extension spring 8, make the kinetic potential that the linking arm 31a that pulled and supported or 31b have to be changeed inwardly, promptly expansion bracket 3 stretches out, and can assist like this and raise the seat of honour 2, makes when upwards lifting the seat of honour 2 more laborsavingly, uses lighter.In practical structures, can at two

downside linking arm

31a and 31b extension spring be set simultaneously, so also can obtain preferable result of use, reach the labour-saving effect.In the present embodiment, also be provided with an extension spring that laterally pulls and supports 8, directly act on two

downside linking arm

31a and 31b, their upper ends are internally received mutually, so also can realize booster action, laborsaving by extension spring 8 in the upper end of two

downside linking arm

31a and 31b.

Described shifting block 6 one ends are hinged on linking arm 31a or the 31b, the other end form an opening up collude groove 61, this colludes groove 61 can collude the protruding pin 41 of holding evagination on the ratchet 4 just.The torsion spring 5 that drives ratchet 4 wherein one is turned round on the protruding pin 41 that arm presses on ratchet 4, and another is turned round arm and then presses on the base 1.During work, on pull on seat 2, expansion bracket 3 stretches out, linking arm 31 is hinged and links, the top slippage work that sliding chute seat on the seat of honour 2 21 cooperates corresponding linking arm 31 to stretch out obtains the space that linking arm 31 moves thus.The most tetragonal two downside linking arm 31a of below, the lower end of 31b relatively rotate, and having can the intermeshing tooth 32a of portion, the 32b mate-assist, and rotational synchronization is good, slow-roll stabilization.On expansion bracket 3, stretch a heights of roofs, be that the seat of honour 2 reach a certain height, then ratchet 4 snaps in the relevant position height locating slot 33 on the lower end of downside linking arm 31a wherein or 31b, gives expansion bracket 3 thus and highly locatees, and realizes that promptly the seat of honour 2 works on a certain height; Ratchet 4 is compressed by torsion spring 5 and realizes its screens work, carries on seat 2 on continuing, and then ratchet 4 can rotate with linking

arm

31a or 31b and snap in next height locating slot 33, to realize Height Adjustment.Shown in Fig. 4,5, when needing the height at the decline seat of honour 2, carry on seat 2 before this, make the tetragonal two downside linking arm 31a of below, the lower end of 31b continue to relatively rotate, when turning to certain position, be arranged on top shifting block 6 on the following confinement block 7 on linking arm 31a or the 31b, make the groove 61 that colludes of shifting block 6 front ends catch on protruding pin 41 on the ratchet 4, thereby act on ratchet 4, make ratchet 4 be subjected to pushing away and remove and height locating slot 33 screens, the rotating space, lower end of at this moment recovering two

downside linking arm

31a, 31b; And the lower end of two

downside linking arm

31a, 31b is when being turned back to certain position, the last confinement block 7 that is arranged on linking arm 31a or the 31b presses down shifting block 6, make the protruding pin 41 that groove 61 withdraws from ratchet 4 that colludes of shifting block 6 front ends, act on ratchet 4 thereby withdraw from, ratchet 4 recovers the function of screens under the effect of torsion spring 5.Shown in Figure 5, when the seat of honour 2 dropped to minimum altitude, ratchet 4 snapped in the corresponding height locating slot 33.

Tea table panel or chair seat can be installed on the seat of honour 2 of the present utility model, can obtain adjustable for height tea table or chair, the convenient use, and structural good.

Certainly, more than diagram is preferred embodiment of the present utility model only, is not to limit practical range of the present utility model with this, so the equivalence that all shapes according to the utility model, structure and principle are done changes, all should be covered by in the protection domain of the present utility model.

Claims

1. adjustable for height crane, comprise base (1), the seat of honour (2) and be connected in base (1) and the seat of honour (2) between expansion bracket (3), it is characterized in that: described expansion bracket (3) is constructed the quadrangle of an activity at least by many linking arms (31) cross-articulation, wherein two linking arms (31) of the top cross-articulation top of stretching out connects the seat of honour (2), is provided with the top slippage work that a sliding chute seat (21) cooperates one linking arm (31) to stretch out on the seat of honour (2) at least; The most tetragonal two downside linking arms (31a of below, lower end 31b) is configured with respectively can the intermeshing tooth (32a of portion, 32b), two downside linking arm (31a, lower end 31b) all is articulated on the base (1), also be provided with several height locating slots (33) therein on the lower end of a downside linking arm (31a or 31b), be articulated on the base (1) with the ratchet (4) of several height locating slot (33) cooperatings, ratchet (4) drives control by a torsion spring (5), and be used to remove the lower end that the shifting block (6) that engage between ratchet (4) and the height locating slot (33) is hinged on same downside linking arm (31a or 31b), the confinement block (7) of spacing shifting block (6) about also being provided with on the lower end of this downside linking arm (31a or 31b).

2. adjustable for height crane according to claim 1 is characterized in that: convex with installation base (11) on the described base (1), the lower end of two downside linking arms (31a, 31b) and ratchet (4) are installed on the same vertical plane of installation base (11).

3. adjustable for height crane according to claim 1, it is characterized in that: one of at least therein the upper end of downside linking arm (31a or 31b) connects an extension spring that pulls and supports (8) inwardly, and the other end of this extension spring (8) is connected on the base (1).

4. adjustable for height crane according to claim 1 is characterized in that: be provided with an extension spring that laterally pulls and supports (8) in the upper end of two downside linking arms (31a, 31b).

5. adjustable for height crane according to claim 1, it is characterized in that: described shifting block (6) one ends are hinged on the linking arm (31a or 31b), the other end form an opening up collude groove (61), this colludes groove (61) and can collude just and hold the protruding pin (41) that ratchet (4) is gone up evagination.

6. adjustable for height according to claim 1 or 5 crane is characterized in that: the torsion spring (5) of described driving ratchet (4) wherein one is turned round on the protruding pin (41) that arm presses on ratchet (4), and another is turned round arm and then presses on the base (1).