CN214548421U

CN214548421U - Sofa stretching device capable of preventing forward turning

Info

Publication number: CN214548421U
Application number: CN202021213168.8U
Authority: CN
Inventors: 李云海; 沈勤英; 王志禹; 毕大岩
Original assignee: Kuka Home Co Ltd
Current assignee: Kuka Home Co Ltd
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-11-02
Anticipated expiration: 2030-06-28

Abstract

The utility model relates to a sofa stretching device for preventing forward turning; the backrest comprises a backrest component, a linkage component and a base; the linkage assembly is arranged on the base, the backrest assembly is rotationally connected with the linkage assembly, and a supporting mechanism is arranged at the front end of the linkage assembly; the support mechanism simultaneously expands forward and downward with the extension of the linkage assembly and eventually contacts the ground to form a support structure. The utility model provides a prevent sofa extension device that turns over forward makes the action of advancing forward through supporting mechanism at the extension initial stage to can clear away the foreign matter in supporting component the place ahead through the piece that supports, avoid the foreign matter to cause the problem of hindrance to the final foothold of supporting component. Simultaneously, the utility model provides a prevent sofa stretching device of turning over forward still has the function that the cushion antedisplacement, back leaned backward.

Description

Sofa stretching device capable of preventing forward turning

Technical Field

The invention relates to the field of sofas or seats, in particular to a functional sofa or seat capable of being converted between a sitting posture, a sitting posture or a lying posture, and particularly relates to a forward-turning-preventing sofa stretching device.

Background

In recent years, functional sofas have become increasingly popular with the market. The functional sofa is a movable multifunctional sofa which can realize the conversion among sitting posture, sitting and lying posture through an iron frame which can move inside the functional sofa. The iron frame of this type of sofa is divided into two main types: handrail floor type and iron stand floor type; the two iron frames are respectively long in the aspects of occupied space and use comfort. The hidden danger of the overall forward overturning is found to exist when the sofa with the floor-standing iron stand is used, and the hidden danger is caused because the contact area between the sofa with the floor-standing iron stand and the ground is insufficient, so that the gravity center of the sofa is easy to be unstable by matching with the specific action of a user in the process of posture conversion of the sofa, particularly after the sofa is switched to a sitting posture or a lying posture, and the whole sofa is overturned forwards.

To eliminate the above-mentioned hidden trouble, the utility model publication No. CN209644426U proposes a supporting structure that rotates outward and touches the ground along with the movement of the sofa iron frame. The support structure pivots outwardly from the sofa iron frame as the sofa iron frame is extended, eventually abutting the ground, thereby providing additional support structure for the sofa iron frame. However, the utility model also has the obvious defect that the supporting structure is directly turned outwards from the sofa iron frame, and because the supporting structure is a rigid part, when the ground of the foot point of the supporting structure is provided with foreign matters, the supporting structure in the utility model can not provide extra supporting force for the sofa iron frame, and the gravity center of the sofa iron frame can be easily inclined or unstable in a reverse manner. Also, the foreign matter pressed by the support structure may be crushed by the weight of the entire sofa.

Disclosure of Invention

The present invention is directed to overcome the above-mentioned drawbacks of the prior art, and to provide a safety support structure capable of avoiding obstacles and providing support for a sofa iron frame.

In order to achieve the above object, the present invention is realized by:

a sofa stretching device for preventing forward overturn comprises a backrest component 1, a linkage component 2 and a base 3; the linkage assembly 2 is arranged on the base 3, the backrest assembly 1 is rotatably connected with the linkage assembly 2, and the front end of the linkage assembly 2 is provided with a supporting mechanism 4; the support mechanism 4 simultaneously expands forward and downward with the extension of the linkage assembly 2 and finally contacts the ground to form a support structure.

The sofa stretching device for preventing forward turning comprises a supporting mechanism 4, wherein the supporting mechanism 4 comprises a contact part 41 and a supporting component 42, the contact part 41 is rotatably connected with a linkage component 2 through a first rotating point 5, the supporting component 42 is rotatably connected with the contact part 41 through a second rotating point 6, the supporting component 42 is rotatably connected with a base 3 through a third rotating point 7, the contact part 41 simultaneously extends forwards and downwards along with the stretching of the linkage component 2 and finally contacts and supports the ground, and the first rotating point 5 and the second rotating point 6 are always positioned at the upper half part of the linkage component.

According to the sofa stretching device for preventing forward overturning, the bottom of the contact piece 41 is located at the first position when the linkage assembly 2 is in the folded state, the bottom of the contact piece 41 is located at the second position when the linkage assembly 2 is in the stretched state, and the horizontal distance between the first position and the second position is larger than 100 mm.

Prevent sofa stretching device that turns over forward, conflict 41 top is passed through first turning point 5 rotates with linkage assembly 2 and is connected, conflict 41 bottom sets up freely and is connected with gyro wheel 411, linkage assembly 2 folds back gyro wheel 411 that targets in place and is located base 3 top, linkage assembly 2 stretches and targets in place back gyro wheel 411 and is located base 3 the place ahead.

The sofa stretching device for preventing forward turning comprises a supporting component 42 and a supporting rod body, wherein one end of the supporting rod body is rotatably connected with a contact part 41 through a second rotating point 6, and the other end of the supporting rod body is rotatably connected with a base 3 through a third rotating point 7.

The first turning point 5 of the sofa stretching device for preventing forward turning is positioned above the second turning point 6 all the time.

The sofa stretching device for preventing the forward turning also comprises a leg component 8, the leg component 8 is connected with the linkage component 2 and stretches along with the stretching of the linkage component 2, and the leg component 8 is positioned above the abutting part 41 after the linkage component 2 stretches to the position.

Prevent sofa stretching device that turns over forward, be equipped with the gangbar 9 between leg subassembly 8 and the linkage subassembly 2, base 3 includes mounting 31 and sets up first follower 32, the second follower 33 at mounting 31 both ends, first follower 32, the second follower 33 rotate with the linkage subassembly 2 and be connected, the one end of gangbar 9 is passed through fourth turning point 10 and is rotated with first follower 32 and be connected, the other end and the linkage subassembly 2 of gangbar 9 rotate and be connected to leg subassembly 8 and supporting mechanism 4 all move along with the action of linkage subassembly 2 and synchronous motion, wherein, first turning point 5, second turning point 6 all are located the top of fourth turning point 10 from beginning to end.

Prevent sofa stretching device of turning over forward, supporting component 42 includes gag lever post 421, push rod 422 and connecting rod 423, and the one end and the first follower 32 of push rod 422 rotate to be connected, and the other end of push rod 422 rotates with the one end of connecting rod 423 to be connected, and the other end of connecting rod 423 passes through second turning point 6 rotates with conflict piece 41 to be connected, and the one end of gag lever post 421 is passed through third turning point 7 rotates with mounting 31 to be connected, and the other end and the push rod 422 of gag lever post 421 rotate to be connected.

In the sofa stretching device for preventing forward turning, the 422 rotation connecting point 11 of the limit rod 421 and the push rod is positioned between two ends of the push rod 422.

The invention provides a supporting structure 4 for preventing a sofa stretching device from overturning forwards and a sofa stretching device body with the safe supporting structure. Advantageously, the supporting mechanism 4 provided by the present invention moves forward from the folded state and expands gradually and further extends after moving forward for a certain distance while the sofa extension device is converted from the folded state to the extended state, the supporting mechanism 4 extends downward while moving forward, and finally, when the sofa completes the extending action, the supporting mechanism 4 also expands completely and contacts the ground through the roller 411 at the end of the contact part 41, thereby providing additional supporting force for the sofa extension device.

Further, on the basis of the above advantages, in the present invention, the first and second turning points 5, 6 between the support structure 4 and the sofa extension are always located above the fourth turning point 10, regardless of whether the sofa extension is in the retracted state or in the extended state. In this way, by arranging the turning point of the supporting structure 4 above the turning point of the linkage assembly 2, the moving distance of the contact 41 in the supporting structure 4 is greater than 100 mm; thereby the sofa stretching device obtains more reliable front auxiliary support and prevents the sofa stretching device from overturning forwards.

The support mechanism 4 of the present invention has further advantages compared to the prior art, especially the support structure of the utility model with the publication number CN 209644426U. In the prior art, the supporting structure only extends out of the sofa iron frame in a rotating way and touches the ground, so that when foreign matters exist at the foot point of the supporting structure, the supporting structure provided by the prior art cannot effectively play a supporting role, and on the contrary, the supporting structure can also become an unstable factor. The supporting mechanism 4 provided by the present invention overcomes this problem, and the supporting mechanism 4 makes a forward pushing motion at the initial stage of extension, so that the supporting mechanism 4 can remove the foreign matter in front of the supporting mechanism 4 through the contact part 41, thereby avoiding the problem that the foreign matter obstructs the final foot-landing point of the supporting mechanism 4.

Drawings

Fig. 1 is a schematic view of a contracted state according to the first embodiment.

Fig. 2 is a schematic diagram of an extended state in accordance with the first embodiment.

FIG. 3 is a schematic view of a contracted state after adding leg assemblies according to one embodiment.

FIG. 4 is a schematic view of an extended state after adding leg assemblies according to an embodiment.

Fig. 5 is a schematic view of the second embodiment in a contracted state.

Fig. 6 is a schematic diagram of an extended state in the second embodiment.

Fig. 7 is a schematic diagram of the stretching process of the first embodiment with the leg assembly.

Detailed Description

The invention is further illustrated by the following specific examples.

The first embodiment is as follows:

as shown in fig. 1, a sofa stretching device comprises a backrest component 1, a linkage component 2 and a base 3, wherein the linkage component 2 is rotatably connected with the base 3, the backrest component 1 is rotatably connected with the linkage component 2, and a support mechanism 4 is arranged at the front end of the linkage component 2. In the sofa stretching device, the linkage component 2 is used for the linkage center function of the whole sofa stretching device, meanwhile, the linkage center function is also used for installing a cushion, and the backrest component 1 is used for installing a sofa backrest, so that the sofa stretching device is particularly suitable for being used as the framework of a functional sofa.

As shown in fig. 2, the linkage assembly 2 is a link mechanism formed by a plurality of rod bodies, and when the linkage assembly 2 is pushed forwards, the linkage assembly drives the backrest assembly 1 to translate along the base 3, so that the function of moving the linkage assembly 2 forwards and driving the backrest assembly 1 to tilt backwards synchronously is realized. Thus, the sofa stretching device with the function of lying nearly flat is formed, and the comfort of the sofa stretching device is further improved.

In the above structure, since the base 3 is fixed, when the linkage assembly 2 moves forward and drives the backrest assembly 1 to tilt backward, the supporting area of the original base 3 cannot meet the requirement of stable support.

For this purpose, a support mechanism 4 linked with the linkage assembly 2 is added beside the base 3. The supporting mechanism 4 comprises a supporting part 41 and a supporting component 42, the top of the supporting part 41 is rotatably connected with the linkage component 2 through a first rotating point 5, the supporting rod 42 is rotatably connected with the supporting part 41 through a second rotating point 6, the supporting component 42 is rotatably connected with the base 3 through a third rotating point 7, and all components of the supporting mechanism 4 synchronously move along with the extension of the linkage component 2. Thus, when the linkage assembly 2 is fully extended, the support mechanism 4 is fully deployed. The supporting mechanism 4, through the forward pushing action of the first rotating point 5, the second rotating point 6 and the linkage assembly 2, causes the abutting member 41 to move forward from the first position in the folded state and gradually move downward to finally contact the ground, thereby providing support for the sofa stretching device in the stretched state to keep the sofa stretching device in the fully stretched state stable.

Since the contact member 41 may contact with the ground, in order to protect the ground and the contact member 41 itself from being damaged by pressure, the roller 411 is disposed at the bottom of the contact member 41, and the contact member 41 contacts with the ground through the roller 411, thereby preventing the contact member 41 and the ground from being damaged by pressure.

As shown in fig. 3 and 4, the sofa extension apparatus may further incorporate a leg assembly 8, the leg assembly 8 being configured to provide support to the user's legs when the linkage assembly 2 is in the extended position. The leg assembly 8 is connected with the linkage assembly 2 and is unfolded synchronously with the extension of the linkage assembly 2, when the linkage assembly 2 is extended to the position, the leg assembly 8 is also fully extended, and at the moment, the leg assembly 8 is positioned above the abutting part 41. Thus, in practice, the sofa stretching device synchronizes the stretching directions and stretching actions of the linkage assembly 2, the leg assembly 8 and the supporting mechanism 4, so that the supporting mechanism 4 is synchronously stretched along with the stretching of the linkage assembly 2 and the leg assembly 8, and the whole sofa stretching device provides auxiliary support.

In the above-described configuration, in order to provide as much as possible a more reliable auxiliary support without affecting the structural rationality of the sofa extension device, it is necessary to move the abutting piece 41 as much forward as possible in the unfolded state, for which reason the pivot point of the support mechanism 4 needs to be scientifically designed.

In order to achieve the above purpose, in the present embodiment, a common component and a rotation point are arranged between the linkage assembly 2 and the base 3, wherein the common component and the rotation point include a linkage rod 9, a first follower 32 and a second follower 33, and the first follower 32 and the second follower 33 are rotatably connected with the linkage rod 9 and the other rod members constituting the linkage assembly 2, so as to rotatably connect the base 3 and the linkage assembly 2. The leg component 8 is rotatably connected with the linkage component 2 through a linkage rod 9. The base 3 comprises a fixed part 31 rotatably connected to a first follower 32 and a second follower 33, said fixed part 31 being intended to carry the entire sofa stretching device and to rest on the ground. One end of the linkage rod 9 is rotationally connected with the first follower 32 through the fourth rotating point 10, and the other end of the linkage rod 9 is rotationally connected with the rod piece and the linkage component 2. Thus, the leg component 8 is driven by the linkage rod 9 to act along with the action of the linkage component 2. In the process, the first and second turning points 5 and 6 between the support mechanism 4 and the linkage assembly 2 are designed to be kept above the fourth turning point 10 all the time. The rotating point between the supporting mechanism 4 and the linkage assembly 2 is arranged above the rotating point between the linkage assembly 2 and the leg assembly 8, so that the lengths of the abutting piece 41 and the supporting assembly 42 are lengthened, and the forward moving distance of the abutting piece 41 after being unfolded is kept between 100mm and 150 mm. Although the above-described embodiment provides the folding function of the contact element 41 by means of the rotatable support element 4, so as to ensure that the support element 4 does not protrude when the sofa extension device is in the retracted state, it is also possible to make the support element 4 smaller in the retracted state by changing the shape of the contact element 41. In this embodiment, the contact member 41 is formed to be bent downward such that the roller 411 is located above the base 3 when the linkage assembly 2 is folded in place, and the roller 411 is located in front of the base 3 when the linkage assembly 2 is extended in place.

Example two

The second embodiment is an improvement over the first embodiment in that the support bar is modified to be the support member 42, except that the general structure is the same as in the first embodiment. The specific variants are as follows:

as shown in fig. 5 and 6, the supporting assembly 42 includes a limiting rod 421, a push rod 422 and a connecting rod 423, one end of the push rod 422 is rotatably connected to the first follower 32, the other end of the push rod 422 is rotatably connected to one end of the connecting rod 423, the other end of the connecting rod 423 is rotatably connected to the contact element 41 through the rotating point 6, one end of the limiting rod 421 is rotatably connected to the fixing element 31 through the third rotating point 7, and the other end of the limiting rod 421 is rotatably connected to the push rod 422; the rotation connection point 11 of the limiting rod 421 and the push rod 422 is located between two ends of the push rod 422.

The second embodiment also achieves the function of folding the support member 42 by changing the form of the support member 42, and ensures that the support mechanism 4 does not protrude when the sofa extension apparatus is in the retracted state. Furthermore, the supporting component 42 is modified into a form of mutual linkage of a plurality of rod pieces, so that the modified supporting mechanism 4 acts more compactly and timely, and meanwhile, the problem that the supporting mechanism 4 generates gaps after long-term use and multiple times of extension is avoided.

As can be seen from the two embodiments, the sofa stretching device provided by the present invention is a sofa stretching device with the functions of forward cushion and synchronous lying back, which provides better comfort compared to the conventional sofa stretching device. Meanwhile, the sofa stretching device provided by the invention also has expansibility, for example, when needed, the sofa stretching device can be added with leg components, so that the sofa stretching device also has the advantage of rich functions. On the basis, the sofa stretching device provided by the invention obtains better additional support and improves the safety of the sofa stretching device through the supporting mechanism with larger forward movement distance.

For the supporting mechanism, compared with the similar products, the supporting mechanism provided by the invention also has the advantages that:

as shown in fig. 7, the supporting mechanism provided by the present invention moves forward from the folded state and gradually expands and extends downward after moving forward for a certain distance as the sofa iron frame is converted from the folded state to the extended state, and finally, when the sofa iron frame completes the extending action, the supporting mechanism also completely expands and contacts the ground through the rubber roller at the end of the abutting member. Different from the supporting structure in the similar products which is a rotary extending structure, the supporting mechanism provided by the invention makes a forward pushing motion at the initial stage of extension, so that foreign matters in front of the supporting component can be removed through the contact piece, and the problem that the foreign matters block the final foot-falling point of the supporting mechanism is avoided.

Meanwhile, the structure of the supporting mechanism provided by the invention is relatively simple, and the supporting mechanism can be connected with the sofa stretching device only by the mutual rotating connection of the two rod pieces, so that the aim of preventing the sofa stretching device from overturning forwards is fulfilled. Meanwhile, the supporting mechanism can be disassembled according to the specific structure of the sofa stretching device, so that the sofa stretching device is connected with the sofa stretching device in an assembling mode through three or even multiple mutually-rotating connections, and the safe supporting structure for preventing the sofa stretching device from overturning forwards is realized.

In view of the above, the present invention essentially provides a safe and reliable and effective support structure for preventing forward toppling of a sofa extension device. Meanwhile, the invention also provides a sofa stretching device which is provided with the safe supporting structure and has the functions of forward cushion movement and backward backrest movement.

Claims

1. A sofa stretching device for preventing forward overturn comprises a backrest component (1), a linkage component (2) and a base (3); the linkage assembly (2) is arranged on the base (3), the backrest assembly (1) is rotatably connected with the linkage assembly (2), and the front end of the linkage assembly (2) is provided with a supporting mechanism (4); the method is characterized in that: the supporting mechanism (4) is unfolded forwards and downwards along with the extension of the linkage component (2) and finally contacts and abuts against the ground to form a supporting structure.

2. The apparatus of claim 1, wherein: the supporting mechanism (4) comprises a supporting part (41) and a supporting component (42), the supporting part (41) is rotatably connected with the linkage component (2) through a first rotating point (5), the supporting component (42) is rotatably connected with the supporting part (41) through a second rotating point (6), the supporting component (42) is rotatably connected with the base (3) through a third rotating point (7), and the supporting part (41) simultaneously expands forwards and downwards along with the extension of the linkage component (2) and finally contacts the ground.

3. The apparatus of claim 2, wherein: the bottom of the contact part (41) is located at a first position in a folded state of the linkage assembly (2), the bottom of the contact part (41) is located at a second position in an extended state of the linkage assembly (2), and the horizontal distance between the first position and the second position is larger than 100 mm.

4. The apparatus of claim 2, wherein: the top of the contact part (41) is rotatably connected with the linkage component (2) through the first rotating point (5), the bottom of the contact part (41) is freely arranged and connected with a roller (411), the linkage component (2) is folded in place, the roller (411) is positioned above the base (3), and the linkage component (2) is stretched in place, and the roller (411) is positioned in front of the base (3).

5. The apparatus of claim 2, wherein: the supporting component (42) comprises a supporting rod body, one end of the supporting rod body is connected with the abutting piece (41) in a rotating mode through the second rotating point (6), and the other end of the supporting rod body is connected with the base (3) in a rotating mode through the third rotating point (7).

6. The apparatus of claim 2, wherein: the first turning point (5) is located above the second turning point (6) all the time.

7. The apparatus of claim 2, wherein: the leg component (8) is connected with the linkage component (2) and extends along with the extension of the linkage component (2), and after the linkage component (2) extends to a position, the leg component (8) is positioned above the contact piece (41) of the supporting mechanism (4).

8. The apparatus of claim 7, wherein: be equipped with gangbar (9) between shank subassembly (8) and linkage subassembly (2), base (3) are including mounting (31) and set up first follower (32), second follower (33) at mounting (31) both ends, first follower (32), second follower (33) rotate with linkage subassembly (2) and are connected, the one end of gangbar (9) is passed through fourth turning point (10) and is rotated with first follower (32) and be connected, the other end and the linkage subassembly (2) of gangbar (9) rotate and be connected to shank subassembly (8) and supporting mechanism (4) all follow the action of linkage subassembly (2) and synchronous motion, wherein, first turning point (5), second turning point (6) all are located the top of fourth turning point (10) from beginning to end.

9. The apparatus of claim 8, wherein: supporting component (42) are including gag lever post (421), push rod (422) and connecting rod (423), and the one end and first follower (32) of push rod (422) rotate to be connected, and the other end of push rod (422) rotates with the one end of connecting rod (423) to be connected, and the other end of connecting rod (423) passes through second commentaries on classics point (6) rotate with conflict piece (41) to be connected, and the one end of gag lever post (421) is passed through third commentaries on classics point (7) rotates with mounting (31) to be connected, and the other end and push rod (422) of gag lever post (421) rotate to be connected.

10. The apparatus of claim 9, wherein: the rotation connecting point (11) of the limiting rod (421) and the push rod (422) is positioned between the two ends of the push rod (422).