CN215737969U

CN215737969U - Stretching device with prevent tong structure

Info

Publication number: CN215737969U
Application number: CN202120364748.5U
Authority: CN
Inventors: 李云海; 褚炳彬; 沈勤英; 王志禹
Original assignee: Kuka Home Co Ltd
Current assignee: Kuka Home Co Ltd
Priority date: 2021-02-07
Filing date: 2021-02-07
Publication date: 2022-02-08
Anticipated expiration: 2031-02-07

Abstract

The application relates to the field of functional sofas, in particular to a stretching device with a hand-clamping prevention structure, which comprises a mounting frame used for being installed in a sofa, an adjusting component connected with the mounting frame and used for adjusting the backrest of the sofa, and an extending component connected with the mounting frame and used for adjusting the leg placing part of the sofa, the extension component comprises a driving push rod hinged with the mounting rack, a driven support rod hinged with the mounting rack, a first connecting rod respectively hinged with the driving push rod and the driven support rod, a second connecting rod hinged with the driven support rod, and a main leg-rest mounting rod respectively hinged with the first connecting rod and the second connecting rod, a four-bar linkage structure is formed among the driven support rod, the first connecting bar, the second connecting bar and the main leg rest mounting rod, a gap is formed between the first connecting bar and the second connecting bar, and either one of the first link and the second link has an extension with an orthographic projection located within the gap. This application has the effect that promotes extension device security.

Description

Stretching device with prevent tong structure

Technical Field

The application relates to the field of functional sofas, in particular to a stretching device with an anti-pinch structure.

Background

Currently, multifunctional sofas are widely used, and these existing multifunctional sofas usually employ a stretching device to provide various functions such as stretching or folding of a leg rest portion, forward and backward tilting of a backrest, and the like.

And extension device leg rest position structure mostly is polygon link mechanism, has the clearance between connecting rod and the connecting rod, and at extension device operation in-process, the clearance also can grow or diminish along with it, if the careless entering of user's finger, then there is the risk of pressing from both sides the wound.

SUMMERY OF THE UTILITY MODEL

In order to improve the safety of the stretching device, the application provides a stretching device with a hand-clamping prevention structure.

The application provides a pair of stretching device with prevent tong structure adopts following technical scheme:

the utility model provides an extension device with prevent tong structure, is including being used for installing the mounting bracket in the sofa, connect the adjusting part that is used for adjusting the sofa back in the mounting bracket, connect the extension subassembly that is used for adjusting sofa leg rest position in the mounting bracket, extend the subassembly including articulate in the initiative push rod of mounting bracket, articulate in the driven branch of mounting bracket, articulate respectively in the first connecting rod of initiative push rod and driven branch, articulate respectively in the second connecting rod of driven branch, articulate respectively in the main leg rest installation pole of first connecting rod and second connecting rod, driven branch, first connecting rod, second connecting rod and main leg rest form four-bar linkage between the installation pole, the clearance has between first connecting rod and the second connecting rod, just arbitrary connecting rod in first connecting rod and the second connecting rod has orthographic projection and is located extension in the clearance.

Through adopting above-mentioned technical scheme, at the in-process that extends the subassembly operation, the initiative push rod swings, the driven branch that the drive formed four-bar linkage, first connecting rod, second connecting rod and main leg rest installation pole extend and contract, and clearance between first connecting rod and the second connecting rod grow thereupon diminishes, because four-bar linkage is located the position that is close to leg rest, when the user hand stretches into leg rest inside carelessly, through the extension on first connecting rod or the second connecting rod, shelter from the clearance, prevent that user hand from stretching into in the clearance, the reduction causes the condition of bodily injury to the user, the security that extends the device has been increased.

Preferably, the side edge of the extension part close to the gap extends in an arc shape.

Through adopting above-mentioned technical scheme, the extension that uses in sheltering from the clearance is the arcuation, make four-bar linkage structure on the one hand at the in-process that extends or shrink, play the effect of sheltering from through what curved extension can be better to the clearance, and be difficult for making four-bar linkage structure after the shrink, the extension stretches out four-bar linkage structure outside more, occupation space is little, it is whole more pleasing to the eye, when on the other hand makes user's hand touch the extension carelessly, reduce the possibility to the hand scratch through curved structure, stretching device's security has further been increased.

Preferably, the other of the first link and the second link is bent toward the gap direction.

Through adopting above-mentioned technical scheme, adopt the mode of buckling, further reduce the width of clearance, reduce the condition that user's hand stretched into in the clearance.

Preferably, the hinge point between the first connecting rod and the driven strut is located at a part of the driven strut, which is far away from the mounting frame.

Through adopting above-mentioned technical scheme, make the pin joint between first connecting rod and the driven branch keep away from the mounting bracket, on the one hand, make the clearance between first connecting rod and the second connecting rod reduce, on the other hand, when the swing of initiative push rod, drive and take place relative rotation between first connecting rod and the driven branch, because the mounting bracket is kept away from to the pin joint between first connecting rod and the driven branch, make driven branch can drive first connecting rod and stretch out longer distance.

Preferably, the hinge point between the first connecting rod and the driven strut is located at a part of the first connecting rod close to the driving push rod.

Through adopting above-mentioned technical scheme, make the pin joint between first connecting rod and the driven branch be close to initiative push rod, when initiative push rod swing, drive and take place relative rotation between first connecting rod and the driven branch, because the pin joint between first connecting rod and the driven branch is close to initiative push rod, make the one end home range that initiative push rod was kept away from to first connecting rod bigger.

Preferably, the extension assembly further comprises a first supporting rod with one end hinged to the first connecting rod, a main leg placing supporting plate with one end hinged to the second supporting rod of the second connecting rod and arranged on the first supporting rod, the other end of the first supporting rod is hinged to the other end of the second supporting rod, the main leg placing supporting plate is provided with a main leg placing mounting plate used for being connected with a main leg placing of the sofa, and when the extension assembly is in an extension state, the main leg placing supporting plate is parallel to the main leg placing mounting plate.

Through adopting above-mentioned technical scheme, under the mutually supporting of first branch and second branch, take place relative motion when the initiative push rod drives between first connecting rod and the second connecting rod, make first branch and second branch drive main leg rest backup pad and take place to rotate, be in under the extension state at the extension subassembly, make main leg rest backup pad be on a parallel with main leg rest mounting panel, support the leg of putting of sofa, increase the bearing capacity and the stability of leg rest position.

Preferably, the extension assembly further comprises an auxiliary leg placing installation rod hinged to the second connecting rod and used for installing an auxiliary leg placing, and a third connecting rod hinged to the main leg placing installation rod and the auxiliary leg placing installation rod respectively, a hinge point of the third connecting rod and the auxiliary leg placing installation rod is located in the middle of the auxiliary leg placing installation rod, a hinge point between the auxiliary leg placing installation rod and the second connecting rod is located at one end, far away from the driven supporting rod, of the second connecting rod, the third connecting rod, the main leg placing installation rod and the auxiliary leg placing installation rod are matched to form a four-bar structure.

Through adopting above-mentioned technical scheme, set up the vice leg rest installation pole of connecting in main leg rest installation pole, when extending the subassembly operation, the main leg rest installation pole and the second connecting rod between take place relative rotation, thereby it overturns to drive the vice leg rest installation pole of third connecting rod pulling, the leg rest portion of sofa can divide into main leg rest and vice leg rest, when main leg rest and vice leg rest expand, in order to carry out whole support to user's shank, when main leg rest and vice leg rest draw in, main leg rest orientation is close to the direction upset of mounting bracket, vice leg rest is around under main leg rest's drive, overturn and accomodate simultaneously.

Preferably, the auxiliary leg rest mounting rod is provided with an auxiliary leg rest mounting plate, and when the extension assembly is in an extension state, the auxiliary leg rest mounting plate is parallel to the main leg rest mounting plate.

Through adopting above-mentioned technical scheme, when extension subassembly is in the extension state, make vice put the leg mounting panel and be on a parallel with main leg rest mounting panel to make main leg rest and vice leg rest be in the parallel state after the expansion, increase the travelling comfort that the user put the leg.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the gap is shielded by the extending part arranged on the first connecting rod or the second connecting rod and the first connecting rod or the second connecting rod arranged in a bent mode, so that the hand of a user is prevented from extending into the gap, the personal injury to the user is reduced, and the safety of the stretching device is improved;

2. under the mutual cooperation of the first support rod and the second support rod, when the extension assembly is in an extension state, the main leg placing support plate is parallel to the main leg placing mounting plate to support the legs of the sofa, so that the bearing capacity and the stability of the leg placing part are improved;

3. set up the vice leg rest installation pole of connecting in main leg rest installation pole, when main leg rest and vice leg rest expand to carry out the whole support to user's shank, when main leg rest and vice leg rest draw in, main leg rest orientation is close to the direction upset of mounting bracket, and vice leg rest is around under the drive of main leg rest, overturns and accomodates simultaneously.

Drawings

Fig. 1 is a schematic view of the overall structure of the present embodiment.

Fig. 2 is a partial structural schematic diagram of the present embodiment.

Fig. 3 is a partial structural schematic diagram of the present embodiment.

Description of reference numerals: 1. a mounting frame; 2. an adjustment assembly; 3. an extension assembly; 4. an active push rod; 5. a driven strut; 6. a first link; 7. a second link; 8. a main leg rest mounting rod; 9. a first support bar; 10. a second support bar; 11. a main leg rest support plate; 12. an auxiliary leg placing mounting rod; 13. a third link; 14. a gap; 15. an extension portion; 16. a main leg rest mounting plate; 17. and an auxiliary leg placing mounting plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses stretching device with prevent tong structure. Referring to fig. 1, an extension device with prevent tong structure includes mounting bracket 1, adjusting part 2 and extension subassembly 3, mounting bracket 1 is used for fixed mounting inside the sofa and supports adjusting part 2 and extension subassembly 3, adjusting part 2 comprises a plurality of connecting rods and connects in the power supply, be connected through the back part with the sofa, make power supply drive adjusting part 2 operation and drive the back and accomplish the action of preceding pitching or pitching backward, and extension subassembly 3 is then installed on mounting bracket 1, and be connected in adjusting part 2, make adjusting part 2 drive the back when pitching backward, drive extension subassembly 3 and extend, and extension subassembly 3 drives the leg rest portion of sofa and expand, adjusting part 2 drives the back and leans on forward simultaneously, drive extension subassembly 3 and draw in, and make the leg rest portion accomodate in the sofa bottom.

Referring to fig. 1 and 2, extension assembly 3 includes a driving push rod 4, a driven strut 5, a first link 6, a second link 7, a main leg rest mounting rod 8, a first strut 9, a second strut 10, a main leg rest support plate 11, an auxiliary leg rest mounting rod 12, and a third link 13.

Referring to fig. 1 and 2, wherein the driving push rod 4 and the driven strut 5 are respectively hinged to the mounting frame 1, the adjusting assembly 2 is hinged to one end of the driving push rod 4 and used for driving the other end of the driving push rod 4 to swing, the first connecting rod 6 is respectively hinged to the driving push rod 4 and the driven strut 5, the end of the first connecting rod 6 is hinged to the end of the driving push rod 4, the part of the first connecting rod 6 close to the driving push rod 4 is hinged to the part of the driven strut 5 far away from the mounting frame 1, and therefore the mounting frame 1, the driving push rod 4, the driven strut 5 and the first connecting rod 6 are matched to form a four-bar structure.

Referring to fig. 2 and 3, since the first link 6 and the second link 7 have the gap 14 therebetween, a portion of the first link 6 near the gap 14 has an extension portion 15 whose orthographic projection is located in the gap 14, and a side of the extension portion 15 near the gap 14 extends in an arc shape. Second connecting rod 7 is buckled towards 14 directions in clearance, in the in-process of extension subassembly 3 operation, initiative push rod 4 swings, the driven branch 5 that drives formation four-bar linkage, first connecting rod 6, second connecting rod 7 and main leg rest installation pole 8 extend and shrink, and clearance 14 between first connecting rod 6 and the second connecting rod 7 diminishes along with it, because four-bar linkage is located the position that is close to the leg rest, when the user hand stretches into inside carelessly and puts the leg, through extension 15 on the first connecting rod 6, and the shape that second connecting rod 7 buckled, shelter from clearance 14, prevent that user hand from stretching into in clearance 14, reduce the condition that causes bodily injury to the user.

Referring to fig. 1 and 2, further, the end of the second connecting rod 7 is hinged to the end of the driven supporting rod 5 far away from the mounting frame 1, the main leg-rest mounting rod 8 is triangular plate-shaped, one corner is hinged to the end of the first connecting rod 6, and the adjacent corner is hinged to the part of the second connecting rod 7 far away from the driven supporting rod 5, so that a four-bar structure is formed among the driven supporting rod 5, the first connecting rod 6, the second connecting rod 7 and the main leg-rest mounting rod 8.

Referring to fig. 1 and 2, in order to install a main leg rest on the main leg rest mounting rod 8, a main leg rest mounting plate 16 is arranged on a side of the main leg rest mounting rod 8, which is far away from the driven supporting rod 5 and close to the first connecting rod 6, and a plurality of mounting holes are formed in the main leg rest mounting plate 16.

Referring to fig. 1 and 2, further, an end of a third link 13 is hinged to a corner of the main leg rest mounting rod 8 far away from the driven support rod 5, an end of an auxiliary leg rest mounting rod 12 is hinged to an end of the second link 7 far away from the driven support rod 5, and an end of the third link 13 far away from the main leg rest mounting rod 8 is hinged to a portion of the auxiliary leg rest mounting rod 12 close to the second link 7, so that the main leg rest mounting rod 8, the auxiliary leg rest mounting rod 12, the second link 7 and the third link 13 are matched with each other to form a four-link structure, and in the four-link structure, the length of the third link 13 plus the main leg rest mounting rod 8 is greater than the length of the second link 7 plus the auxiliary leg rest.

Referring to fig. 1 and 2, in order to facilitate the installation of the auxiliary leg rest on the auxiliary leg rest installation rod 12, an auxiliary leg rest installation plate 17 is disposed at one end of the auxiliary leg rest installation rod 12, which is far away from the second connecting rod 7, and a plurality of installation holes are disposed on the auxiliary leg rest installation plate 17.

Referring to fig. 1 and 2, when extension assembly 3 operates, relative rotation takes place between main leg rest installation pole 8 and the second connecting rod 7 to drive the vice leg rest installation pole 12 of third connecting rod 13 pulling and overturn, when extension assembly 3 is in the extension state, vice leg rest mounting panel 17 is on a parallel with main leg rest mounting panel 16, and the leg rest portion of sofa divide into main leg rest and vice leg rest, when main leg rest and vice leg rest expand, in order to carry out the integral support to user's shank, when main leg rest draws in with vice leg rest, main leg rest orientation is close to the direction upset of mounting bracket 1, vice leg rest is around under main leg rest's drive, overturn and accomodate simultaneously.

Referring to fig. 1 and 2, further, the end of the first rod 9 is hinged to the middle of the first rod 6, the end of the second rod 10 is hinged to the middle of the second rod 7, the other end of the second rod 10 is hinged to the middle of the first rod 9, the main leg-rest support plate 11 is arranged at one end of the first rod 9 far away from the first rod 6, and when the extension assembly 3 is in the extension state, the main leg-rest support plate 11 is parallel to the main leg-rest mounting plate 16.

The implementation principle of the stretching device with the anti-pinch structure in the embodiment of the application is as follows:

in the in-process of extending the operation of subassembly 3, initiative push rod 4 swings, the driven branch 5 that the drive formed four-bar linkage, first connecting rod 6, second connecting rod 7 and main leg rest installation pole 8 extend and contract, and clearance 14 between first connecting rod 6 and the second connecting rod 7 diminishes along with it grow, because four-bar linkage is located the position that is close to the leg rest, when the user hand stretches into inside the leg rest carelessly, through extension 15 on first connecting rod 6, and the shape that second connecting rod 7 buckled, shelter from clearance 14, prevent that user hand from stretching into in clearance 14, the reduction leads to the fact the condition of bodily injury to the user.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a stretching device with prevent tong structure, is used for installing mounting bracket (1) in the sofa, connects in mounting bracket (1) and is used for adjusting sofa back adjusting part (2), connects in mounting bracket (1) and is used for adjusting stretching subassembly (3) at sofa leg rest position, its characterized in that: the extension assembly (3) comprises a driving push rod (4) hinged to the mounting frame (1), a driven support rod (5) hinged to the mounting frame (1), a first connecting rod (6) hinged to the driving push rod (4) and the driven support rod (5) respectively, a second connecting rod (7) hinged to the driven support rod (5), and a main leg-placing mounting rod (8) hinged to the first connecting rod (6) and the second connecting rod (7) respectively, wherein a four-connecting-rod structure is formed between the driven support rod (5), the first connecting rod (6), the second connecting rod (7) and the main leg-placing mounting rod (8), a gap (14) is formed between the first connecting rod (6) and the second connecting rod (7), and any one of the first connecting rod (6) and the second connecting rod (7) has an extension portion (15) with a positive projection located in the gap (14).

2. The extension device with hand-pinching prevention structure of claim 1, wherein: the side edge of the extension part (15) close to the gap (14) extends in an arc shape.

3. The extension device with hand-pinching prevention structure of claim 1, wherein: the other of the first connecting rod (6) and the second connecting rod (7) is bent towards the gap (14).

4. The extension device with hand-pinching prevention structure of claim 1, wherein: the hinge point between the first connecting rod (6) and the driven supporting rod (5) is located at the part, away from the mounting frame (1), of the driven supporting rod (5).

5. The extension device with hand-pinching prevention structure of claim 1, wherein: the hinge point between the first connecting rod (6) and the driven support rod (5) is positioned at the part of the first connecting rod (6) close to the driving push rod (4).

6. The extension device with hand-pinching prevention structure of claim 1, wherein: extend subassembly (3) still include one end articulate in first branch (9), the one end of first connecting rod (6) articulate in second branch (10) of second connecting rod (7), locate main leg rest backup pad (11) of first branch (9), first branch (9) other end articulate in the second branch (10) other end, main leg rest installation pole (8) are equipped with main leg rest mounting panel (16) that are used for connecting the main leg rest of sofa, and when extending subassembly (3) and be in the state of extension, main leg rest backup pad (11) are on a parallel with main leg rest mounting panel (16).

7. The extension device with hand-pinching prevention structure of claim 6, wherein: the extension assembly (3) further comprises an auxiliary leg placing installation rod (12) hinged to the second connecting rod (7) and used for installing an auxiliary leg placing, and a third connecting rod (13) hinged to the main leg placing installation rod (8) and the auxiliary leg placing installation rod (12) respectively, a hinge point of the third connecting rod (13) and the auxiliary leg placing installation rod (12) is located at the middle part of the auxiliary leg placing installation rod (12), a hinge point between the auxiliary leg placing installation rod (12) and the second connecting rod (7) is located at one end, away from the driven supporting rod (5), of the second connecting rod (7), the third connecting rod (13), the main leg placing installation rod (8) and the auxiliary leg placing installation rod (12) are matched to form a four-connecting rod structure.

8. The extension device with hand-pinching prevention structure of claim 7, wherein: vice put leg mounting rod (12) and be equipped with vice put leg mounting panel (17), when extension subassembly (3) were in the state of extending, vice put leg mounting panel (17) be on a parallel with main put leg mounting panel (16).