CN219962376U - Sofa backrest lifting frame and sofa - Google Patents
Sofa backrest lifting frame and sofa Download PDFInfo
- Publication number
- CN219962376U CN219962376U CN202321336855.2U CN202321336855U CN219962376U CN 219962376 U CN219962376 U CN 219962376U CN 202321336855 U CN202321336855 U CN 202321336855U CN 219962376 U CN219962376 U CN 219962376U
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- China
- Prior art keywords
- sofa
- support
- rail
- piece
- backrest
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C17/00—Sofas; Couches; Beds
- A47C17/04—Seating furniture, e.g. sofas, couches, settees, or the like, with movable parts changeable to beds; Chair beds
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C20/00—Head -, foot -, or like rests for beds, sofas or the like
- A47C20/08—Head -, foot -, or like rests for beds, sofas or the like with means for adjusting two or more rests simultaneously
- A47C20/10—Head -, foot -, or like rests for beds, sofas or the like with means for adjusting two or more rests simultaneously using rods
- A47C20/12—Head -, foot -, or like rests for beds, sofas or the like with means for adjusting two or more rests simultaneously using rods using telescopic rods
Abstract
The utility model discloses a sofa backrest lifting frame and a sofa, which comprise a fixed bracket, a sliding bracket, a pair of linkage mechanisms and a connecting rod, wherein the sliding bracket is provided with two support arms and a cross rod connected between the two support arms, and the two support arms are respectively arranged on two sides of the fixed bracket in a sliding manner; the linkage mechanisms are symmetrically arranged on two sides of the fixed support respectively, and one ends of the linkage mechanisms are connected to the support arms on the same side; the two ends of the connecting rod are respectively connected between the other ends of the two linkage mechanisms; when any one of the two support arms slides, the other support arm is driven by the linkage mechanism and the connecting rod to slide synchronously. The sofa backrest lifting frame can enable any side to synchronously descend when any side is manually pressed down, so that the sofa backrest lifting frame is prevented from being blocked, and is simple in structure, convenient to operate and long in service life.
Description
Technical Field
The utility model relates to household articles, in particular to a sofa backrest lifting frame and a sofa.
Background
In order to adapt to different users, the backrest of the existing sofa is generally arranged into a lifting and adjusting structure. When the backrest is required to be lifted, the stretching end of the stretching device is only required to be controlled to stretch out, so that the backrest can be pushed to lift relative to the sofa main body. When the backrest is required to be lowered, the backrest is only required to be manually pressed down to be in a low position.
However, for some sofas, the length of the lifting frame for lifting the backrest is relatively large, as shown in fig. 1, the structure of the backrest lifting frame 200 of the existing sofa is shown in the drawing, two sides of the sliding frame 201 connected with the backrest are slidably mounted on the fixed frame 202, and the telescopic device 203 is generally mounted in the middle of the sliding frame 201. When the backrest is lowered, if only one side of the backrest is pressed, since the sliding support 201 is pressed downward and the stress point is on one side and is pushed upward by the telescopic device 203, the stress point is in the middle, the unbalanced stress of the sliding support 201 can deform the two ends, which in turn can affect the telescopic end of the telescopic device 203, so that the telescopic end cannot be retracted smoothly, and thus the unstressed end of the sliding support 201 cannot move downward synchronously with the stressed end. Therefore, the backrest is easy to be blocked when being lowered, the backrest cannot be lowered smoothly, and the service life is shortened due to improper operation; the operator needs to press both ends of the sliding support 201 simultaneously by both hands to balance the stress so as to lower the backrest, which is inconvenient to operate.
Disclosure of Invention
The utility model aims to provide a sofa backrest lifting frame which can enable the other side to synchronously descend when any side is manually pressed down, so that the sofa backrest lifting frame is prevented from being blocked, is simple in structure, improves the convenience of operation and prolongs the service life.
The utility model also aims to provide a sofa which can enable the whole backrest to synchronously descend when any side of the backrest of the sofa is manually pressed down, and has the advantages of simple operation, convenient use and long service life.
In order to achieve the above purpose, the sofa backrest lifting frame provided by the utility model comprises a fixed bracket, a sliding bracket, a pair of linkage mechanisms and a connecting rod, wherein the sliding bracket is provided with two support arms and a cross rod connected between the two support arms, and the two support arms are respectively arranged on two sides of the fixed bracket in a sliding manner; the linkage mechanisms are symmetrically arranged on two sides of the fixed support respectively, and one ends of the linkage mechanisms are connected to the support arms on the same side; the two ends of the connecting rod are respectively connected between the other ends of the two linkage mechanisms; when any one of the two support arms slides, the other support arm is driven by the linkage mechanism and the connecting rod to slide synchronously.
Compared with the prior art, the utility model has the advantages that the two support arms are provided with the linkage mechanisms, and the connecting rod is connected between the two linkage mechanisms, so that when any one end of the sliding support is pressed, the support arm at the side slides downwards to drive the connecting rod through the linkage mechanism at the side, and then the linkage mechanism at the other side is driven to act through the connecting rod, so that the support arm at the other side can be driven to slide downwards synchronously through the linkage mechanism at the other side, namely, the scheme converts the power of the support arm at the side into torsion through the two linkage mechanisms and the connecting rod and transmits the torsion to the other side, and further, the support arm at the other side is driven to slide synchronously. Therefore, this scheme can be so that both ends of sliding support all receive decurrent driving force, reaches the balanced purpose of atress, prevents to take place to warp because of sliding support and appear the dead phenomenon of card, makes the operation become simpler, improves the convenience of use to can effectively increase of service life.
Preferably, the linkage mechanism comprises a first connecting piece and a second connecting piece, one end of the first connecting piece is pivoted with the support arm at the side, the other end of the first connecting piece is pivoted with one end of the second connecting piece, and the other end of the second connecting piece is pivoted with the fixed bracket; the connecting rod is fixedly connected with the second connecting piece. The first connecting piece and the second connecting piece are utilized to convert the sliding power of the support arm into torsion, so that the power is transmitted to the linkage mechanism on the other side through the connecting rod, and the aim of synchronously driving the support arm on the other side is fulfilled.
Specifically, the second connecting piece is pivoted to the pivot shaft of the fixed bracket and is coaxial with the rotation center shaft of the connecting rod. Therefore, the swinging force of the second connecting piece is utilized to drive the connecting rod to rotate, so that the connecting rod outputs torsion and drives the linkage mechanism on the other side to act, and the stability and effectiveness of force transmission are ensured.
Preferably, the sofa backrest lifting frame further comprises a driving device, wherein the driving device is arranged between the two support arms, and the output end of the driving device is connected to the middle part of the cross rod. The driving device is used for driving the sliding support to slide, so that the operation is simpler, and the convenience of use is improved.
Specifically, the driving device is an electric push rod or a pneumatic spring.
Preferably, the fixing support is provided with a guide sliding rail, and the support arm is slidably arranged on the guide sliding rail. The guide sliding rail is arranged, so that friction resistance between the support arm and the fixed support can be reduced, and smooth sliding is ensured.
Specifically, the guide slide rail comprises a first rail piece, a second rail piece and rollers rolling between the first rail piece and the second rail piece, wherein the first rail piece is fixed on the fixed support, and the second rail piece is fixed on the support arm. Through with the roller set up in between first track spare and the second track spare, can make first track spare is rolling contact with the second track spare to can greatly reduce frictional resistance, improve gliding smoothness nature, guarantee that the support arm of atress can be steadily with the power transmission to the support arm of opposite side.
Specifically, the guide slide rail further comprises a positioning bracket, the positioning bracket is arranged between the first track piece and the second track piece, and the roller is arranged on the positioning bracket. The locating support can limit the roller, prevents that the roller from breaking away from first track spare and second track spare, guarantees the job stabilization nature of direction slide rail.
Preferably, the fixing bracket comprises a pair of side frames, the two side frames are oppositely arranged, and the support arms are slidably arranged on the side frames.
The sofa comprises a sofa main body, a backrest and a sofa backrest lifting frame, wherein the sofa backrest lifting frame is arranged between the sofa main body and the backrest, so that the backrest can slide relative to the sofa main body.
Drawings
Fig. 1 is a state diagram of a conventional sofa backrest lifter when one side is pressed.
Fig. 2 is a structural view of the sofa of the present utility model.
Fig. 3 is a state diagram of the sofa backrest lifting frame when lifted according to the first embodiment of the utility model.
Fig. 4 is a structural view of one side of a sofa backrest lifting frame according to a first embodiment of the utility model.
Fig. 5 is an exploded view of a sofa back-rest lift of a first embodiment of the present utility model.
Fig. 6 is a structural view of a guide rail of a sofa backrest lifting frame according to the first embodiment of the present utility model.
Fig. 7 is a state diagram of the sofa backrest lifting frame in the first embodiment of the utility model when the sofa backrest lifting frame descends.
Fig. 8 is a state diagram of one side of the sofa backrest lifting frame after being lowered according to the first embodiment of the utility model.
Fig. 9 is a state diagram of the sofa backrest lifting frame in the second embodiment of the utility model when lifted.
Fig. 10 is a state diagram of the sofa backrest lifting frame in the second embodiment of the utility model when the sofa backrest lifting frame descends.
Detailed Description
In order to describe the technical content, the constructional features and the effects achieved by the present utility model in detail, the following description is made with reference to the embodiments in conjunction with the accompanying drawings.
As shown in fig. 2 to 8, a structure of a first embodiment of the present utility model is shown. Referring to fig. 2 and 3, the sofa 300 of the present utility model includes a sofa main body 301, a backrest 302 and a sofa backrest lifting frame 100, wherein the sofa backrest lifting frame 100 is disposed between the sofa main body 301 and the backrest 302, so that the backrest 302 can slide relative to the sofa main body 301, and the sliding direction is ascending or descending relative to the sofa main body 301. The sofa backrest lifting frame 100 comprises a fixed bracket 1, a sliding bracket 2, a pair of linkage mechanisms 3 and a connecting rod 4, wherein the fixed bracket 1 is fixed on two opposite inner sides of the sofa main body 301. The fixing bracket 1 comprises a pair of side frames 11, and the two side frames 11 are oppositely arranged. The sliding bracket 2 is provided with two support arms 21 and a cross bar 22 fixedly connected between the two support arms 21, and the two support arms 21 are respectively arranged on the side frame 11 of the fixed bracket 1 in a sliding manner; the cross bar 22 is fixedly coupled to the backrest 302. The linkage mechanisms 3 are symmetrically arranged on two sides of the fixed bracket 1 respectively, and one ends of the linkage mechanisms are connected to the support arms 21 on the same side; the two ends of the connecting rod 4 are respectively connected between the other ends of the two linkage mechanisms 3; when one of the two support arms 21 slides, the other support arm is driven to slide synchronously through the linkage mechanism 3 and the connecting rod 4.
Referring to fig. 3 to 5, the linkage mechanism 3 includes a first connecting member 31 and a second connecting member 32, and the first connecting member 31 and the second connecting member 32 have a long rod-shaped structure. One side of the support arm 21 is provided with a first connecting seat 211, one end of the first connecting piece 31 is pivoted with the first connecting seat 211 of the support arm 21 on the side, the other end of the first connecting piece 31 is pivoted with one end of the second connecting piece 32, and the other end of the second connecting piece 32 is pivoted with the second connecting seat 111 of the side frame 11. One end of the connecting rod 4 is fixedly connected with the second connecting piece 32. The other end of the connecting rod 4 is fixedly connected with the second connecting piece 32 positioned at the other side. The first connecting piece 31 and the second connecting piece 32 can convert the sliding power of the support arm 21 into torsion, so that the torsion is transmitted to the linkage mechanism 3 on the other side through the connecting rod 4, and the aim of synchronously driving the support arm 21 on the other side is fulfilled. Specifically, the second connecting piece 32 is pivotally connected to the pivot shaft of the fixing bracket 1 and is coaxial with the rotation center axis of the connecting rod 4. The swinging force of the second connecting piece 32 is used for driving the connecting rod 4 to rotate, so that the connecting rod 4 outputs torsion and drives the linkage mechanism 3 on the other side to act, and the stability and the effectiveness of force transmission are ensured.
As shown in fig. 3, the sofa backrest lifting frame 100 further includes a driving device 5, where the driving device 5 is disposed between the two support arms 21, and the output end of the driving device is connected to the middle portion of the cross bar 22. The driving device 5 is used for driving the sliding support 2 to slide, so that the operation is simpler, and the convenience of use is improved. The driving device 5 is a pneumatic spring. When the switch of the pneumatic spring is pressed, the telescopic end of the pneumatic spring can automatically extend out, so that the sliding support 2 is driven to slide and ascend on the fixed support 1, and when the height of the sliding support 2 needs to be lowered, the sliding support 2 can be pressed, so that the sliding support 2 drives the telescopic end of the pneumatic spring to retract downwards.
Referring to fig. 4 to 6, the fixing bracket 1 is provided with a guide rail 6, and the support arm 21 is slidably disposed on the guide rail 6. The guiding sliding rail 6 is arranged, so that friction resistance between the supporting arm 21 and the fixed support 1 can be reduced, and smooth sliding is ensured. Specifically, the guide rail 6 includes a first rail member 61, a second rail member 62, and a roller 63 rolling between the first rail member 61 and the second rail member 62, the first rail member 61 is fixed to the fixing bracket 1, and the second rail member 62 is fixed to the arm 21. The two sides of the first rail member 61 are bent to form a first side wall 611, the cross section of the first side wall 611 presents a downward concave arc surface 611a, the two sides of the second rail member 62 are bent to form a second side wall 621, the cross section of the second side wall 621 presents an arc structure 621a, the roller 63 is a steel ball, and the roller 63 is disposed between the arc surface 611a of the first side wall 611 and the arc structure 621a of the second side wall 621, so as to prevent accidental falling out. By arranging the rollers 63 between the first rail member 61 and the second rail member 62, the first rail member 61 and the second rail member 62 can be in rolling contact, so that friction resistance can be greatly reduced, sliding smoothness is improved, and the forced support arm 21 can stably transmit power to the support arm 21 on the other side.
As shown in fig. 5 and 6, specifically, the guide rail 6 further includes a positioning bracket 64, the positioning bracket 64 is disposed between the first rail member 61 and the second rail member 62 and is slidable relative to the first rail member 61 and the second rail member 62, and the roller 63 is disposed on the positioning bracket 64. The positioning bracket 64 can limit the roller 63, prevent the roller 63 from separating from the first rail member 61 and the second rail member 62, and ensure the working stability of the guide rail 6.
In summary, the working principle of the sofa backrest lifting frame 100 of the present utility model is described in detail below with reference to fig. 7 and 8, as follows:
as shown in fig. 3 and 4, when the sliding support 2 needs to be lifted, only the switch of the pneumatic spring needs to be pressed, so that the telescopic end of the pneumatic spring extends upwards, at this time, the telescopic end of the pneumatic spring pushes the cross bar 22 to lift, the cross bar 22 drives the two end support arms 21 to lift, and the support arms 21 move upwards relative to the fixed support 1 until the cross bar 22 lifts to the target position to stop. During this process, the cross bar 22 moves the back of the sofa upward.
As shown in fig. 7 and 8, when the sliding support 2 needs to be lowered, only one end of the cross bar 22 needs to be pressed, and then the end drives the supporting arm 21 at the same side to move downwards along the side frame 11 of the fixed support 1, the supporting arm 21 at the same side drives the first connecting piece 31 to swing, the first connecting piece 31 drives the second connecting piece 32 to swing around the pivot shaft where the second connecting piece 32 is pivoted with the fixed support 1, the second connecting piece 32 drives the connecting rod 4 to rotate around its central axis, and the second connecting piece 32 drives the connecting rod 4 to rotate around its central axis. The connecting rod 4 drives the second connecting piece 32 on the other side to swing, the second connecting piece 32 drives the first connecting piece 31 on the same side to swing, and at this time, the first connecting piece 31 on the other side drives the support arm 21 on the side to descend along the side frame 11 of the fixed bracket 1. At this time, both the arms 21 can be lowered simultaneously. The cross bar 22 can drive the backrest of the sofa to descend.
Compared with the prior art, the utility model has the advantages that the two support arms 21 are provided with the linkage mechanisms 3, and the connecting rod 4 is connected between the two linkage mechanisms 3, so that when any end of the sliding support 2 is pressed, the support arm 21 on the side slides downwards to drive the connecting rod 4 through the linkage mechanism 3 on the side, and then the linkage mechanism 3 on the other side is driven to act through the connecting rod 4, and the support arm 21 on the other side can be driven to slide downwards synchronously through the linkage mechanism 3 on the other side, namely, the scheme converts the power of the support arm 21 on the side into torsion through the two linkage mechanisms 3 and the connecting rod 4 and transmits the torsion to the other side, so that the support arm 21 on the other side is driven to slide synchronously. Therefore, this scheme can make both ends of sliding support 2 all receive decurrent driving force, reaches the balanced purpose of atress, prevents to take place to warp because of sliding support 2 and appear the dead phenomenon of card, makes the operation become simpler, improves the convenience of use to can effectively increase of service life.
Referring to fig. 9 and 10, a sofa backrest lift 100' of a second embodiment is shown. The structure of the sofa backrest lifting frame 100 'of the present embodiment is basically the same as that of the first embodiment, except for the driving device 5'. The driving device 5' in this embodiment is an electric push rod, and the electric push rod is controlled to start and stop by a remote controller. When the electric push rod is adopted to control the sliding support 2 'to ascend or descend, only the motor of the electric push rod is controlled to positively and negatively rotate through the remote controller, so that the telescopic end of the electric push rod stretches out or retracts, and the sliding support 2' can be driven to ascend or descend without manual operation, and the electric push rod is more convenient to use.
The foregoing disclosure is merely illustrative of the principles of the present utility model, and thus, it is intended that the scope of the utility model be limited thereto and not by this disclosure, but by the claims appended hereto.
Claims (10)
1. A sofa backrest lifting frame, which is characterized in that: the device comprises a fixed bracket, a sliding bracket, a pair of linkage mechanisms and a connecting rod, wherein the sliding bracket is provided with two support arms and a cross rod connected between the two support arms, and the two support arms are respectively arranged on two sides of the fixed bracket in a sliding manner; the linkage mechanisms are symmetrically arranged on two sides of the fixed support respectively, and one ends of the linkage mechanisms are connected to the support arms on the same side; the two ends of the connecting rod are respectively connected between the other ends of the two linkage mechanisms; when any one of the two support arms slides, the other support arm is driven by the linkage mechanism and the connecting rod to slide synchronously.
2. The sofa back lift rack of claim 1, wherein: the linkage mechanism comprises a first connecting piece and a second connecting piece, one end of the first connecting piece is pivoted with the support arm on the side, the other end of the first connecting piece is pivoted with one end of the second connecting piece, and the other end of the second connecting piece is pivoted with the fixed bracket; the connecting rod is fixedly connected with the second connecting piece.
3. The sofa back lift rack of claim 2, wherein: the second connecting piece is pivoted with the pivot shaft of the fixed bracket and the rotation center shaft of the connecting rod are coaxial.
4. The sofa back lift rack of claim 1, wherein: the sofa backrest lifting frame further comprises a driving device, wherein the driving device is arranged between the two support arms, and the output end of the driving device is connected to the middle part of the cross rod.
5. The sofa back lift rack of claim 4, wherein: the driving device is an electric push rod or a pneumatic spring.
6. The sofa back lift rack of claim 1, wherein: the fixed support is provided with a guide sliding rail, and the support arm is slidably arranged on the guide sliding rail.
7. The sofa back lift rack of claim 6, wherein: the guide sliding rail comprises a first rail piece, a second rail piece and rollers rolling between the first rail piece and the second rail piece, wherein the first rail piece is fixed on the fixed support, and the second rail piece is fixed on the support arm.
8. The sofa back lift rack of claim 7, wherein: the guide sliding rail further comprises a positioning support, the positioning support is arranged between the first rail piece and the second rail piece, and the rollers are arranged on the positioning support.
9. The sofa back lift rack of claim 1, wherein: the fixing bracket comprises a pair of side frames, the two side frames are oppositely arranged, and the support arms are slidably arranged on the side frames.
10. A sofa, characterized in that: the sofa comprises a sofa main body, a backrest and the sofa backrest lifting frame as claimed in any one of claims 1 to 9, wherein the sofa backrest lifting frame is arranged between the sofa main body and the backrest so that the backrest can slide relative to the sofa main body.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321336855.2U CN219962376U (en) | 2023-05-29 | 2023-05-29 | Sofa backrest lifting frame and sofa |
| DE202023107123.6U DE202023107123U1 (en) | 2023-05-29 | 2023-12-01 | Lifting mechanism for the backrest of a sofa and sofa |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321336855.2U CN219962376U (en) | 2023-05-29 | 2023-05-29 | Sofa backrest lifting frame and sofa |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219962376U true CN219962376U (en) | 2023-11-07 |
Family
ID=88593117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321336855.2U Active CN219962376U (en) | 2023-05-29 | 2023-05-29 | Sofa backrest lifting frame and sofa |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN219962376U (en) |
| DE (1) | DE202023107123U1 (en) |
-
2023
- 2023-05-29 CN CN202321336855.2U patent/CN219962376U/en active Active
- 2023-12-01 DE DE202023107123.6U patent/DE202023107123U1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE202023107123U1 (en) | 2023-12-22 |
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