Sports sofa and use method

Abstract

The invention provides a sports sofa and a use method. The sports sofa comprises a mechanical stretching device and a linear brake for driving the stretching device to move, the mechanical stretching device comprises a base, a displacement mechanism and a backrest connecting piece, the displacement mechanism comprises a longitudinal rod, a first double-swing-arm set, a second double-swing-arm set, a third double-swing-arm set and a double-rocker set, the first double-swing-arm set is arranged on the base, the third double-swing-arm set is arranged on the longitudinal rod, and the second double-swing-arm set is arranged on the second double-swing-arm set. The second double-swing-arm group is arranged between the first double-swing-arm group and the third double-swing-arm group; the double-rocker set is arranged at the rear end of the longitudinal rod, and the backrest connecting piece is arranged on the double-rocker set. In the using process, the linear brake drives the three double-swing-arm sets to swing forwards and drives the longitudinal rod, the double-rocker set and the backrest connecting piece to move forwards together; in the TV posture state, when the linear brake continues to drive the three double-swing-arm sets to swing forwards, the double-rocker sets swing forwards on the longitudinal rods, and the backrest connecting pieces move forwards relative to the longitudinal rods and rotate backwards under the action of the double-rocker sets.

Description

Technical Field

[0001] The invention relates to the field of furniture, and in particular to a sports sofa and a use method thereof. Background Art

[0002] With the continuous improvement of living standards, people have higher and higher requirements for comfortable life. In the fast-paced and high-pressure life, having a comfortable sofa or leisure chair for resting can play a very good role in improving people's living standards. The electric sofas or electric leisure chairs currently available on the market can be driven by motors to achieve the extension and folding of the footrest of the sofa or leisure chair and the adjustment of the backrest angle.

[0003] For products such as electric sofas, the backrest moves during the state switching process, especially when switching to the lying state, the backrest will rotate backwards and fall down. During this process, the sofa is required to be placed a certain distance from the wall to prevent the backrest from hitting the wall when falling backwards and being unable to continue moving.

[0004] In order to allow the backrest to fall down smoothly and without obstacles, the space occupied by the backrest after falling down needs to be taken into consideration when placing the sofa. However, since there is always a gap between the electric sofa and the wall, the indoor space utilization rate is poor, and the sofa occupies a large space and is wasted. Therefore, a displacement mechanism is provided in the electric sofa, which can drive the backrest to move forward together with the seat before the backrest falls down, so as to form a space between the backrest and the wall to avoid the backrest from falling down. However, in existing products, the backrest is only rotatably arranged on the above mechanism, that is, during the process of the backrest falling down, the backrest only rotates backward. If the overall movement of the mechanism is further improved, the forward movement distance of the backrest can be increased in this process, so that the electric sofa can be brought closer to the wall. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a motion sofa, comprising a mechanical extension device and a linear actuator driving the extension device to move; the mechanical extension device comprises a base, a displacement mechanism and a backrest connecting member, the displacement mechanism comprises a longitudinal rod, a first double swing arm group, a second double swing arm group, a third double swing arm group and a double rocker group, the first double swing arm group is arranged on the base, the third double swing arm group is arranged on the longitudinal rod, and the second double swing arm group is arranged between the first double swing arm group and the third double swing arm group; the double rocker group is arranged at the rear end of the longitudinal rod and the backrest connecting member is arranged on the double rocker group; when switching from a sitting position to a TV position and from a TV position to a lying position, the first, second and third double swing arm groups all swing forward and drive the longitudinal rod, the double rocker group and the backrest connecting member to move forward; when switching from the TV position to the lying position, the double rocker group swings forward on the longitudinal rod and drives the backrest connecting member to move forward relative to the longitudinal rod.

[0006] A method for using a motion sofa is further provided, comprising a preset linked displacement mechanism, a preset driver, switching from a sitting position to a TV position and from a TV position to a lying position; after completing the setting of the displacement mechanism and the driver, driving the linear actuator to switch the position; in the sitting position, the linear actuator drives the first, second and third double swing arm groups to swing forward and drives the longitudinal rod to move forward, the longitudinal rod drives the double rocker group and the backrest connecting member to move forward together and the double rocker group and the backrest connecting member remain stationary relative to the longitudinal rod; in the TV position, the linear actuator continues to drive the first, second and third double swing arm groups to swing forward, the longitudinal rod continues to move forward accordingly, the longitudinal rod drives the double rocker group and the backrest connecting member to move forward together, the double rocker group swings forward on the longitudinal rod, and the backrest connecting member moves forward and rotates backward relative to the longitudinal rod under the action of the double rocker group.

[0007] The technical solution of the present invention is achieved in this way: A motion sofa comprises a mechanical extension device and a linear actuator arranged on the mechanical extension device, wherein the linear actuator is configured to drive the mechanical extension device to move and switch the mechanical extension device between a sitting position, a TV position and a lying position; the mechanical extension device comprises a base, a displacement mechanism and a backrest connecting piece, wherein the displacement mechanism is arranged on the base, the backrest connecting piece is arranged on the displacement mechanism and configured to connect to a sofa backrest, one end of the linear actuator is arranged on the base, and the other end of the linear actuator is connected to the displacement mechanism to drive the displacement mechanism to move; the displacement mechanism comprises a longitudinal rod, a first double swing arm group, a second double swing arm group, a third double swing arm group and a double rocker The first double swing arm group is arranged on the base, the third double swing arm group is arranged on the longitudinal rod, and the second double swing arm group is arranged between the first double swing arm group and the third double swing arm group; the double rocker group is arranged on the rear end of the longitudinal rod and the backrest connecting piece is arranged on the double rocker group; when the first, second and third double swing arm groups are configured to switch from the sitting position to the TV position and from the TV position to the lying position, the first, second and third double swing arm groups all swing forward and drive the longitudinal rod, the double rocker group and the backrest connecting piece to move forward; when the double rocker group is configured to switch from the TV position to the lying position, the double rocker group swings forward on the longitudinal rod and drives the backrest connecting piece to move forward relative to the longitudinal rod.

[0008] In the mechanical extension device, the base is configured to remain stationary with the ground, the displacement mechanism can perform a preset movement on the base, and the linear actuator is used to drive the displacement mechanism to move so as to achieve switching between a sitting position, a TV position and a lying position; the first double swing arm group, the second double swing arm group, the third double swing arm group and the double rocker group in the displacement mechanism all have the ability to swing relative to the base, and when the four swing forward, they can give the backrest connecting member a forward displacement so that the backrest connecting member moves forward away from the wall and provides the space required for the backrest to fall back; and, since the displacement mechanism can swing more components forward, compared with the prior art, in terms of the number of swingable components, the number is greater, the distance is greater, and it has more advantages, that is, it can increase the distance of the backrest moving forward, thereby further reducing the distance from the wall when the sofa is placed.

[0009] In terms of the linkage of the swingable components, the longitudinal rod links the double rocker group with the three double swing arm groups, and when switching from a sitting position to a TV position, the backrest connector and the double rocker group move forward along with the swing of the three double swing arm groups; when switching from a TV position to a lying position, the double rocker group moves forward along with the swing of the three double swing arm groups and further swings forward relative to the longitudinal rod to further increase the forward movement distance of the backrest connector.

[0010] A method for using a sports sofa, using the sports sofa as described above: Preset linkage displacement mechanism: the first double swing arm group is rotated and set on the base, the second double swing arm group is rotated and set on the first double swing arm group, and the third double swing arm group is rotated and set on the second double swing arm group, so that the first, second and third double swing arm groups are linked; the longitudinal rod is rotated and set on the third double swing arm group, and the double rocker group is rotated and set on the longitudinal rod, so that the first, second and third double swing arm groups are linked with the double rocker group; the backrest connector is rotated and set on the double rocker group; Preset drive: Set the linear actuator on the base and make the linear actuator act on the displacement mechanism; Switching from the sitting posture to the TV posture: in the sitting posture, the linear actuator drives the first, second and third double swing arm groups to swing forward and drive the longitudinal rod to move forward, and the longitudinal rod drives the double rocker group and the backrest connecting member to move forward together, and the double rocker group and the backrest connecting member remain stationary relative to the longitudinal rod; Switching from TV posture to lying posture: in TV posture, the linear actuator continues to drive the first, second and third double swing arm groups to swing forward, and the longitudinal rod continues to move forward. While the longitudinal rod drives the double rocker group and the backrest connecting part to move forward together, the double rocker group swings forward on the longitudinal rod, and the backrest connecting part moves forward and rotates backward relative to the longitudinal rod under the action of the double rocker group.

[0011] The solution of only relying on the swing assembly to drive the backrest to move forward has limitations, especially in the process of switching from the TV posture to the lying posture, it is difficult to provide the backrest with more forward movement distance due to the limitation of the swing angle of the swing link, and the backrest is also falling backward synchronously during this process; and the present solution further adds a double rocker group, and on the premise of linking the three double swing arm groups with the double rocker group through the longitudinal bar, during the process of the backrest falling down, that is, during the process of switching from the TV posture to the lying posture, the double rocker group swings forward relative to the longitudinal bar, and while the three double swing arm groups provide forward movement, the double rocker group also independently provides an additional forward movement distance to the backrest connecting part, so that the vacant space behind the backrest is more sufficient to prevent the backrest from hitting the wall and causing damage when it falls, and it is also more reasonable in the timing of the double rocker assembly moving and providing additional forward movement distance.

[0012] Preferably, the preset linkage displacement mechanism includes a preset double rocker group: the lower end of the first rocker is rotatably connected to the longitudinal rod, the lower end of the second rocker is rotatably connected to the rear end of the longitudinal rod, the front end of the connecting rod is rotatably connected to the first rocker, and the rear end of the connecting rod is rotatably connected to the second rocker; the front end of the backrest connecting piece is rotatably connected to the upper end of the first rocker. The first rocker, the second rocker and the connecting rod form a double rocker after being set on the longitudinal rod, that is, the movement of the first rocker and the second rocker on the longitudinal rod will be linked by the connecting rod. When the second rocker rotates forward on the longitudinal rod, it will drive the connecting rod to move, and the connecting rod will push the second rocker to rotate forward on the longitudinal rod.

[0013] As a preferred embodiment, the preset double rocker group also includes a motion track of the preset double rocker group: the lower end of the second auxiliary rod is rotated and set on the base, and the upper end of the second auxiliary rod is rotatably connected to the second rocker; when switching from the sitting position to the TV position, the upper end of the second auxiliary rod rotates forward, so that the second swing rod moves forward with the longitudinal rod; when switching from the TV position to the lying position, the upper end of the second auxiliary rod moves downward, driving the second swing rod to rotate on the longitudinal rod. The second auxiliary rod rotates forward and downward on the base, and the rotation of the second auxiliary rod is divided into two stages. In the first stage, the second auxiliary rod mainly rotates forward, so that the second rocker basically does not rotate on the longitudinal rod, but moves forward with the longitudinal rod. The first stage is that the sofa switches from the sitting position to the TV position, so that the backrest connector and the backrest only move with the longitudinal rod; in the second stage, the second auxiliary rod mainly rotates downward, so that the second swing rod rotates forward on the longitudinal rod. The second stage is that the sofa switches from the TV position to the lying position, so that the backrest tilts backward.

[0014] Preferably, the second rocker comprises a linkage part and a driving part, the linkage part is connected to the driving part at one end, the other end of the linkage part is rotationally connected to the second auxiliary rod, and the other end of the driving part is rotationally connected to the backrest connecting member. The second rocker serves as the power input for the movement of the double rocker group and the backrest connecting member, and the linkage part is configured so that when the backrest connecting member tilts backward, the linkage part moves with the longitudinal rod relative to the base, the linkage part drives the second auxiliary rod to rotate on the base, and the second auxiliary rod in turn makes the linkage part rotate downward on the longitudinal rod and drives the driving part to rotate forward and downward together; the driving part is configured so that when the linkage part drives the driving part to rotate together, the driving part drives the backrest connecting member to rotate.

[0015] Preferably, the second rocker is V-shaped, and an angle is formed between the linkage part and the driving part, and a corner is formed at the connection between the two. The second rocker is rotatably connected to the longitudinal rod at the corner. The reason why the second rocker is V-shaped is that an angle is formed between the linkage part and the driving part, so that when the linkage part and the driving part rotate together, although the rotation direction is the same, the displacement trajectories of the ends of the two parts due to the rotation are different. The end of the linkage part mainly cooperates with the second auxiliary rod to move downward, and the driving part needs to drive the backrest and the first rocker to move forward and downward, thereby presetting the movement trajectory of the backrest connecting frame.

[0016] Preferably, a first auxiliary rod is provided between the backrest connector and the second rocker, and both ends of the first auxiliary rod are rotatably connected to the driving parts of the backrest connector and the second rocker, respectively. The first auxiliary rod can make the movement of the backrest connector and the double rocker group smoother, and can also be used to preset the movement trajectory of the backrest connector.

[0017] Preferably, a connecting plate extending backward is fixedly connected to the rear end of the backrest connecting member, and the connecting plate is rotatably connected to the first auxiliary rod. The connecting plate exists to cooperate with the first auxiliary rod to limit the movement track of the backrest connecting member.

[0018] Preferably, the connecting rod is rotatably connected to the middle part of the first rocking arm and the second rocking arm.

[0019] Preferably, the displacement mechanism with preset linkage also includes a preset double swing arm group: the first swing link and the second swing link are arranged at intervals in front and back and the lower ends of both are rotatably connected to the base; the upper ends of the third swing link and the upper ends of the fourth swing link are rotatably connected to the longitudinal rod; the fifth swing link is rotatably connected to the first swing link and the third swing link respectively, so that the first swing link, the third swing link and the fifth swing link are linked; the sixth swing link is rotatably connected to the second swing link and the fourth swing link respectively, so that the second swing link, the fourth swing link and the sixth swing link are linked. The linkage of the three is achieved by nesting the three double swing arm groups.

[0020] Preferably, a first longitudinal link and a second longitudinal link are further provided between the fifth swing link and the sixth swing link, so that the fifth swing link and the sixth swing link are linked; the two ends of the first longitudinal link are respectively rotatably connected to the lower end of the first swing link and the lower end of the sixth swing link; the two ends of the second longitudinal link are respectively rotatably connected to the upper end of the first swing link and the upper end of the sixth swing link. The linkage of the two swing arms in the double swing arm group is achieved by arranging the first longitudinal link and the second longitudinal link on the second double swing arm group.

[0021] Preferably, the lower ends of the third swing link and the fourth swing link are both rotatably connected to the first longitudinal link. This preferred solution can also reduce the overall height of the three double swing arm groups to achieve the requirement of a low seat height for the sofa and improve the sitting comfort.

[0022] Preferably, a linkage rod is rotatably connected between the first swing link or the second swing link and the second longitudinal link. The second longitudinal link, the linkage rod, the fifth swing link or the sixth swing link and the corresponding first swing link or the second swing link can form a four-bar linkage, and is used for the linkage of the first swing link group and the second swing link group, limiting the movement trajectory of the two swing link groups, so that the movement is stably carried out according to the preset trajectory.

[0023] Preferably, the upper end of the first swing link is rotatably connected to the upper part of the fifth swing link, and the upper end of the second swing link is rotatably connected to the upper part of the sixth swing link. The second double swing arm group is suspended downwardly on the first double swing arm group, thereby further reducing the overall height of the three double swing arm groups.

[0024] Preferably, the first swing link is substantially parallel to the second swing link, the third swing link is substantially parallel to the fourth swing link, and the fifth swing link is substantially parallel to the sixth swing link. Each set of double swing arm groups swings synchronously, thereby achieving overall stable forward and backward movement.

[0025] The design starting point, concept and beneficial effects of the present invention using the above technical solution are: In the mechanical extension device, the base is configured to remain stationary with the ground, the displacement mechanism can perform a preset movement on the base, and the linear actuator is used to drive the displacement mechanism to move so as to achieve switching between a sitting position, a TV position and a lying position; the first double swing arm group, the second double swing arm group, the third double swing arm group and the double rocker group in the displacement mechanism all have the ability to swing relative to the base, and when the four swing forward, they can give the backrest connecting member a forward displacement so that the backrest connecting member moves forward away from the wall and provides the space required for the backrest to fall back; and, since the displacement mechanism can swing more components forward, compared with the prior art, in terms of the number of swingable components, the number is greater, the distance is greater, and it has more advantages, that is, it can increase the distance of the backrest moving forward, thereby further reducing the distance from the wall when the sofa is placed.

[0026] In terms of the linkage of the swingable components, the longitudinal rod links the double rocker group with the three double swing arm groups, and when switching from a sitting position to a TV position, the backrest connector and the double rocker group move forward along with the swing of the three double swing arm groups; when switching from a TV position to a lying position, the double rocker group moves forward along with the swing of the three double swing arm groups and further swings forward relative to the longitudinal rod to further increase the forward movement distance of the backrest connector.

[0027] The solution of only relying on the swing assembly to drive the backrest to move forward has limitations, especially in the process of switching from the TV posture to the lying posture, it is difficult to provide the backrest with more forward movement distance due to the limitation of the swing angle of the swing link, and the backrest is also falling backward synchronously during this process; and the present solution further adds a double rocker group, and on the premise of linking the three double swing arm groups with the double rocker group through the longitudinal bar, during the process of the backrest falling down, that is, during the process of switching from the TV posture to the lying posture, the double rocker group swings forward relative to the longitudinal bar, and while the three double swing arm groups provide forward movement, the double rocker group also independently provides an additional forward movement distance to the backrest connecting part, so that the vacant space behind the backrest is more sufficient to prevent the backrest from hitting the wall and causing damage when it falls, and it is also more reasonable in the timing of the double rocker assembly moving and providing additional forward movement distance.

[0028] In addition, through the movement of the backrest connector when switching from the TV posture state to the lying position, that is, rotating backward and moving forward at the same time, and the rotation point of the backrest connector also moves forward and downward, it can also prevent back rubbing and waist distension, thereby providing comfort for the use of the sofa. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the three-dimensional structure of the mechanical extension device in a sitting state in an embodiment of the present invention; Figure 2 The side view of the mechanical extension device in the embodiment of the present invention in the sitting position Figure 1 ; Figure 3 The side view of the mechanical extension device in the embodiment of the present invention in the sitting position Figure 2 ; Figure 4 is a schematic diagram of the three-dimensional structure of the mechanical stretching device in the embodiment of the present invention in the TV posture state; Figure 5 The side view of the mechanical extension device in the embodiment of the present invention in the TV posture state Figure 1 ; Figure 6 The side view of the mechanical extension device in the embodiment of the present invention in the TV posture state Figure 2 ; Figure 7 is a schematic diagram of the three-dimensional structure of the mechanical stretching device in a lying state in an embodiment of the present invention; Figure 8 The side view of the mechanical extension device in the embodiment of the present invention in the lying state Figure 1 ; Fig. 9 The side view of the mechanical extension device in the embodiment of the present invention in the lying state Figure 2 ; Fig.10 It is a schematic diagram of a three-dimensional structure in which a linear actuator is arranged on a mechanical stretching device in an embodiment of the present invention; Fig.11 It is a schematic diagram of the movement of the double rocker group and the three double swing arm groups when the state is switched in the embodiment of the present invention.

[0030] The figures are marked as follows: base 1; backrest connector 2; longitudinal rod 3; first rocker arm 4; second rocker arm 5; linkage portion 51; drive portion 52; corner 53; connecting rod 6; first auxiliary rod 7; second auxiliary rod 8; connecting plate 9; footrest connector 10; footrest connecting rod assembly 11; seat connector 12; first swing link 13; second swing link 14; third swing link 15; fourth swing link 16; fifth swing link 17; sixth swing link 18; first longitudinal link 19; second longitudinal link 20; linkage rod 21; linear actuator 22. DETAILED DESCRIPTION

[0031] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0033] In the description of the present invention, the terms “first”, “second”, “third”, etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0034] The specific implementation of the present invention is as follows: like Figure 1-11As shown, the present invention provides a motion sofa, comprising a mechanical extension device and a linear actuator 22 arranged on the mechanical extension device, the linear actuator 22 is configured to drive the mechanical extension device to move, and switch the mechanical extension device between a sitting state, a TV state and a lying state; the mechanical extension device comprises a base 1, a displacement mechanism and a backrest connector 2, the displacement mechanism is arranged on the base 1, the backrest connector 2 is arranged on the displacement mechanism and configured to connect the sofa backrest, one end of the linear actuator 22 is arranged on the base 1, and the other end of the linear actuator 22 is connected to the displacement mechanism to drive the displacement mechanism to move; the displacement mechanism comprises a longitudinal rod 3, a first double swing arm group, a second double swing arm group, a third double swing arm group The first double swing arm group is arranged on the base 1, the third double swing arm group is arranged on the longitudinal rod 3, and the second double swing arm group is arranged between the first double swing arm group and the third double swing arm group; the double swing arm group is arranged on the rear end of the longitudinal rod 3 and the backrest connecting member 2 is arranged on the double swing arm group; when the first, second and third double swing arm groups are configured to switch from the sitting position to the TV position and from the TV position to the lying position, the first, second and third double swing arm groups all swing forward and drive the longitudinal rod 3, the double rocker group and the backrest connecting member 2 to move forward; when the double rocker group is configured to switch from the TV position to the lying position, the double rocker group swings forward on the longitudinal rod 3 and drives the backrest connecting member 2 to move forward relative to the longitudinal rod 3.

[0035] Furthermore, a method for using a sports sofa is provided, such as Fig.11 As shown, using the motion sofa as described above, including: Preset linkage displacement mechanism: the first double swing arm group is rotated and set on the base 1, the second double swing arm group is rotated and set on the first double swing arm group, and the third double swing arm group is rotated and set on the second double swing arm group, so that the first, second and third double swing arm groups are linked; the longitudinal rod 3 is rotated and set on the third double swing arm group, and the double rocker group is rotated and set on the longitudinal rod 3, so that the first, second and third double swing arm groups are linked with the double rocker group; the backrest connector 2 is rotated and set on the double rocker group; Preset drive: set the linear actuator 22 on the base 1 and make the linear actuator 22 act on the displacement mechanism; Switching from the sitting posture to the TV posture: in the sitting posture, the linear actuator 22 extends to drive the first, second and third double swing arm groups to swing forward and drive the longitudinal rod 3 to move forward, and the longitudinal rod 3 drives the double rocker group and the backrest connecting member 2 to move forward together, and the double rocker group and the backrest connecting member 2 remain stationary relative to the longitudinal rod 3; Switch from TV posture to lying posture: in TV posture, the linear actuator 22 continues to extend to drive the first, second and third double swing arm groups to swing forward, and the longitudinal rod 3 continues to move forward. The longitudinal rod 3 drives the double rocker group and the backrest connecting member 2 to move forward together, while the double rocker group swings forward on the longitudinal rod 3, and the backrest connecting member 2 moves forward and rotates backward relative to the longitudinal rod 3 under the action of the double rocker group.

[0036] In the mechanical extension device, the base 1 is configured to remain stationary with the ground, the displacement mechanism can perform a preset movement on the base 1, and the linear actuator 22 is used to drive the displacement mechanism to move so as to achieve switching between a sitting position, a TV position and a lying position; the first double swing arm group, the second double swing arm group, the third double swing arm group and the double rocker group in the displacement mechanism all have the ability to swing relative to the base 1. When the four swing forward, they can give the backrest connector 2 a forward displacement so that the backrest connector 2 moves forward away from the wall and provides the space required for the backrest to fall back; and, since the displacement mechanism can swing forward more components, compared with the prior art, in terms of the number of swingable components, the number is greater, the distance is greater, and it has more advantages, that is, it can increase the distance of the backrest moving forward, thereby further reducing the distance from the wall when the sofa is placed.

[0037] In terms of the linkage of the swingable components, the longitudinal rod 3 links the double rocker group with the three double swing arm groups, and when switching from the sitting position to the TV position, the backrest connector 2 and the double rocker group move forward with the swing of the three double swing arm groups. When switching from the TV position to the lying position, the double rocker group moves forward with the swing of the three double swing arm groups and further swings forward relative to the longitudinal rod 3 to further increase the forward movement distance of the backrest connector 2.

[0038] The solution of only relying on the swing assembly to drive the backrest to move forward has limitations, especially in the process of switching from the TV posture to the lying posture, it is difficult to provide the backrest with more forward movement distance due to the limitation of the swing angle of the swing link, and the backrest is also falling backward synchronously during this process; and the present solution further adds a double rocker group, and on the premise of linking the three double swing arm groups with the double rocker group through the longitudinal rod 3, during the process of the backrest falling down, that is, during the process of switching from the TV posture to the lying posture, the double rocker group swings forward relative to the longitudinal rod 3, and while the three double swing arm groups provide forward movement, the double rocker group also independently provides an additional forward movement distance to the backrest connector 2, so that the vacant space behind the backrest is more sufficient to prevent the backrest from hitting the wall and causing damage when it falls, and it is also more reasonable in the timing of the double rocker assembly moving and providing additional forward movement distance.

[0039] In addition, through the movement of the backrest connector 2 when switching from the TV posture state to the lying position, that is, rotating backward and moving forward at the same time, and the rotation point of the backrest connector 2 also moves forward and downward, it can also prevent back rubbing and waist distension, thereby providing comfort for the use of the sofa.

[0040] Furthermore, the preset linkage displacement mechanism includes a preset double rocker group: Figure 3 , 5 As shown in , 8, the lower end of the first rocker arm 4 is rotationally connected to the longitudinal rod 3, the lower end of the second rocker arm 5 is rotationally connected to the rear end of the longitudinal rod 3, the front end of the connecting rod 6 is rotationally connected to the first rocker arm 4, and the rear end of the connecting rod 6 is rotationally connected to the second rocker arm 5; the front end of the backrest connecting member 2 is rotationally connected to the upper end of the first rocker arm 4; the first rocker arm 4, the second rocker arm 5 and the connecting rod 6 form a double rocker after being set on the longitudinal rod 3, that is, the movement of the first rocker arm 4 and the second rocker arm 5 on the longitudinal rod 3 will be linked by the connecting rod 6, when the second rocker arm 5 rotates forward on the longitudinal rod 3, it will drive the connecting rod 6 to move, and the connecting rod 6 will push the second rocker arm 5 to rotate forward on the longitudinal rod 3.

[0041] The preset double rocker group also includes a motion trajectory of the preset double rocker group: the lower end of the second auxiliary rod is rotatably set on the base 1, and the upper end of the second auxiliary rod is rotatably connected to the second rocker 5; when switching from the sitting position to the TV position, the upper end of the second auxiliary rod rotates forward, so that the second swing arm moves forward with the longitudinal rod 3; when switching from the TV position to the lying position, the upper end of the second auxiliary rod moves downward, driving the second swing arm to rotate on the longitudinal rod 3; the second auxiliary rod rotates forward and downward on the base 1, and the rotation of the second auxiliary rod is divided into two stages. In the first stage, the second auxiliary rod mainly rotates forward, so that the second rocker 5 basically does not rotate on the longitudinal rod 3, but moves forward with the longitudinal rod 3. The first stage is that the sofa switches from the sitting position to the TV position, so that the backrest connector 2 and the backrest only move with the longitudinal rod 3; in the second stage, the second auxiliary rod mainly rotates downward, so that the second swing arm rotates forward on the longitudinal rod 3. The second stage is that the sofa switches from the TV position to the lying position, so that the backrest tilts backward.

[0042] The preset linkage displacement mechanism also includes a preset double swing arm group: Figure 1 , 4As shown in , 7, the first swing link 13 and the second swing link 14 are arranged at intervals in front and back and the lower ends of both are rotatably connected to the base 1; the upper ends of the third swing link 15 and the upper ends of the fourth swing link 16 are rotatably connected to the longitudinal rod 3; the fifth swing link 17 is rotatably connected to the first swing link 13 and the third swing link 15 respectively, so that the first swing link 13, the third swing link 15 and the fifth swing link 17 are linked; the sixth swing link 18 is rotatably connected to the second swing link 14 and the fourth swing link 16 respectively, so that the second swing link 14, the fourth swing link 16 and the sixth swing link 18 are linked; the linkage of the three is achieved by nesting the three double swing arm groups.

[0043] Specifically, in the sports sofa, the base 1 is configured as the main support of the mechanical extension device, and the backrest connector 2 is configured to be used for connecting the backrest; the longitudinal rod 3 is longitudinally arranged in the front-to-back direction, the first rocker arm 4 is located in front of the second rocker arm 5, the connecting rod 6 is longitudinally arranged in the front-to-back direction, and the front end of the connecting rod 6 is rotatably connected to the first rocker arm 4, and the rear end of the connecting rod 6 is rotatably connected to the second rocker arm 5; the lower end of the first rocker arm 4 is rotatably connected to the longitudinal rod 3, the upper end of the first rocker arm 4 is rotatably connected to the backrest connector 2, the second rocker arm 5 is rotatably connected to the longitudinal rod 3 and is linked to the backrest connector 2; a first auxiliary rod 7 is provided between the backrest connector 2 and the second rocker arm 5, one end of the first auxiliary rod 7 is rotatably connected to the backrest connector 2, and the other end of the first auxiliary rod 7 is rotatably connected to the second rocker arm 5, and the first auxiliary rod 7 is configured to link the second rocker arm 5 with the backrest connector 2.

[0044] Furthermore, if Figure 1 , 4 As shown in Figures 7, the sitting state, TV state and lying state of the mechanical extension device respectively correspond to the state of the sofa for a normal sitting state, the state of the sofa footrest being extended for a sitting state with a raised foot, and the state of the sofa footrest being extended and the backrest being fallen down for a lying state.

[0045] like Figure 3 , 5As shown in Figures 1 and 8, the second rocker 5 is V-shaped, and includes a linkage portion 51 and a driving portion 52. The linkage portion 51 is connected to the driving portion 52 at one end, and the other end of the linkage portion 51 is rotatably connected to the second auxiliary rod 8, and the other end of the driving portion 52 is rotatably connected to the first auxiliary rod 7; there is an angle between the linkage portion 51 and the driving portion 52, and a corner 53 is formed at the connection between the two, and the second rocker 5 is rotatably connected to the longitudinal rod 3 at the corner 53; the second rocker 5 serves as a power input for the movement of the double rocker group and the backrest connecting member 2, and the linkage portion 51 is configured so that when the backrest connecting member 2 tilts backward, the linkage portion 51 moves with the longitudinal rod 3 relative to the base 1, and the linkage portion 51 drives the second auxiliary rod 8 to rotate on the base 1, and the second rocker 5 is connected to the longitudinal rod 3 at the corner 53. The second auxiliary rod 8 in turn causes the linkage part 51 to rotate downward on the longitudinal rod 3, and drives the driving part 52 to rotate forward and downward together; the driving part 52 is configured so that when the linkage part 51 drives the driving part 52 to rotate together, the driving part 52 drives the backrest connecting member 2 to rotate via the first auxiliary rod 7; the reason why the second rocker 5 is V-shaped is that an angle is formed between the linkage part 51 and the driving part 52, so that when the linkage part 51 and the driving part 52 rotate together, although the rotation directions are the same, the displacement trajectories of the ends of the two are different due to the rotation. The end of the linkage part 51 mainly cooperates with the second auxiliary rod 8 to move downward, and the driving part 52 needs to drive the backrest and the first rocker 4 and therefore moves forward and downward, thereby limiting the movement trajectory of the backrest.

[0046] In addition, the connecting rod 6 is rotatably connected to the middle part of the first rocker arm 4 and the second rocker arm 5; the rear end of the backrest connecting member 2 is fixedly connected with a connecting plate 9 extending backward, and the connecting plate 9 is rotatably connected to the first auxiliary rod 7; the connecting plate 9 exists to cooperate with the first auxiliary rod 7 to limit the movement trajectory of the backrest connecting member 2.

[0047] The mechanical extension device also includes a footrest connector 10 and a footrest connecting rod assembly 11. The footrest connector 10 is configured to install a footrest. The footrest connector 10 is arranged on the footrest connecting rod assembly 11. The footrest connecting rod assembly 11 is rotatably arranged on the displacement mechanism and linked with the displacement mechanism. The extension of the footrest is achieved through the movement of the footrest connecting rod assembly 11. The movement of the footrest is not the focus of this embodiment, so the structure of the footrest connecting rod assembly 11 is not described in detail in this embodiment. In this embodiment, the mechanical extension device also includes a seat connector 12. The seat connector 12 is used to install the seat, and the seat connector 12 is installed on the longitudinal rod 3. Therefore, when the sofa switches state, the seat will also move together.

[0048] Specifically, if Figure 1 , 4As shown in Figures 7 and 8, the first double swing arm group, the second double swing arm group and the third double swing arm group are superimposed on each other, the first double swing arm group is rotatably connected to the base 1 and swings forward and backward relative to the base 1, the second double swing arm group is rotatably connected to the first double swing arm group and swings forward and backward relative to the first double swing arm group, the third double swing arm group is rotatably connected to the second double swing arm group and swings forward and backward relative to the second double swing arm group, the third double swing arm group is rotatably connected to the longitudinal rod 3 and drives the longitudinal rod 3 to swing relative to the base 1, and the longitudinal rod 3 moves forward and drives the backrest connecting rod assembly to move; through this scheme, both the seat-back linkage and the zero-wall placement of the sofa can be realized; in the process of switching from a sitting position to a lying position, the three double swing arm groups all swing forward, so that the longitudinal rod 3 continuously drives the backrest connecting member 2 to move forward, so that the backrest connecting member 2 and the rear end of the mechanical extension device are farther and farther away, that is, the distance from the wall is getting larger and larger, so that the backrest connecting member 2 and the backrest will not touch the wall when lying back, and the zero-wall placement is realized.

[0049] Furthermore, the first double swing arm group includes a first swing link 13 and a second swing link 14, the third double swing arm group includes a third swing link 15 and a fourth swing link 16, and the second double swing arm group includes a fifth swing link 17 and a sixth swing link 18; a first longitudinal link 19 and a second longitudinal link 20 are also provided between the fifth swing link 17 and the sixth swing link 18, so that the fifth swing link 17 and the sixth swing link 18 are linked; the lower end of the first swing link 13 and the lower end of the second swing link 14 are rotatably connected to the base 1, the upper end of the first swing link 13 is rotatably connected to the upper part of the fifth swing link 17, the upper end of the second swing link 14 is rotatably connected to the upper part of the sixth swing link 18, the lower end of the fifth swing link 17 and the lower end of the sixth swing link 18 are rotatably connected to the first longitudinal link 19, and the third swing link 1 5 and the lower end of the fourth swing link 16 are also rotatably connected to the first longitudinal link 19; the upper ends of the third swing link 15 and the fourth swing link 16 are rotatably connected to the longitudinal rod 3; each set of swing links swings synchronously, so as to achieve overall stable forward and backward movement, and the longitudinal rod 3 and the backrest connecting member 2 can move accordingly; in conjunction with the second auxiliary rod 8 and the second rocker 5, the backrest moves with the seat when the sitting posture is switched to the TV posture state, and the backrest can be tilted backward when the TV posture is switched to the lying posture state; the swinging of the three sets of swing links is independent of each other and superimposed on each other, that is, the movements of the three sets of swing links will not interfere with each other, and they can swing stably, and after each set swings forward, their respective forward movement distances can be superimposed to maximize the gap between the backrest and the wall for the backrest to fall backward.

[0050] The second longitudinal link 20 is rotatably connected to the upper ends of the fifth swing link 17 and the sixth swing link 18; the second transverse link is used to stabilize the movement of the sixth swing link 18 and the fifth swing link 17, and synchronize the movement of the fifth swing link 17 and the sixth swing link 18. Furthermore, a rotatably connected linkage rod 21 is provided between the first swing link 13 or the second swing link 14 and the second longitudinal link 20; the second transverse link, the linkage rod 21, the fifth swing link 17 or the sixth swing link 18 and the corresponding first swing link 13 or the second swing link 14 can constitute a four-bar linkage, and is used for the linkage of the first double swing arm group and the second double swing arm group, limiting the movement trajectory of the two double swing arm groups, so that the movement is carried out stably according to the preset trajectory; in this embodiment, the linkage rod 21 is arranged between the first swing link 13 and the second longitudinal link 20, and the two ends of the linkage rod 21 are rotatably connected to the first swing link 13 and the second longitudinal link 20 respectively; the first swing link 13 and the second swing link 14 remain roughly parallel, the third swing link 15 and the fourth swing link 16 are roughly parallel, the fifth swing link 17 and the sixth swing link 18 are roughly parallel, and each group of double swing arm groups swings synchronously, thereby achieving overall stable forward and backward movement.

Claims

1. A sports sofa, characterized in that: The invention comprises a mechanical extension device and a linear actuator arranged on the mechanical extension device, wherein the linear actuator is configured to drive the mechanical extension device to move and switch the mechanical extension device between a sitting position, a TV position and a lying position; the mechanical extension device comprises a base, a displacement mechanism and a backrest connecting piece, wherein the displacement mechanism is arranged on the base, the backrest connecting piece is arranged on the displacement mechanism and configured to connect to a sofa backrest, one end of the linear actuator is arranged on the base, and the other end of the linear actuator is connected to the displacement mechanism to drive the displacement mechanism to move; the displacement mechanism comprises a longitudinal rod, a first double swing arm group, a second double swing arm group, a third double swing arm group and a double rocker group, wherein the first double swing arm group is provided with a first double swing arm group, a second double swing arm group, a third double swing arm group and a double rocker group, wherein the first double swing arm group is provided with a first double swing arm group, a second double swing arm group, a third double swing arm group and a double rocker group, wherein the first double swing arm group is provided with a first double swing arm group, a second double swing arm group and a third double swing arm ... The double swing arm group is arranged on the base, the third double swing arm group is arranged on the longitudinal rod, and the second double swing arm group is arranged between the first double swing arm group and the third double swing arm group; the double rocker group is arranged at the rear end of the longitudinal rod and the backrest connecting piece is arranged on the double rocker group; when the first, second and third double swing arm groups are configured to switch from a sitting position to a TV position and from a TV position to a lying position, the first, second and third double swing arm groups all swing forward and drive the longitudinal rod, the double rocker group and the backrest connecting piece to move forward; when the double rocker group is configured to switch from a TV position to a lying position, the double rocker group swings forward on the longitudinal rod and drives the backrest connecting piece to move forward relative to the longitudinal rod.

2. A method for using a sports sofa, characterized in that: Using the sports sofa as claimed in claim 1: Preset linkage displacement mechanism: the first double swing arm group is rotated and set on the base, the second double swing arm group is rotated and set on the first double swing arm group, and the third double swing arm group is rotated and set on the second double swing arm group, so that the first, second and third double swing arm groups are linked; the longitudinal rod is rotated and set on the third double swing arm group, and the double rocker group is rotated and set on the longitudinal rod, so that the first, second and third double swing arm groups are linked with the double rocker group; the backrest connector is rotated and set on the double rocker group; Preset drive: Set the linear actuator on the base and make the linear actuator act on the displacement mechanism; Switching from the sitting posture to the TV posture: in the sitting posture, the linear actuator drives the first, second and third double swing arm groups to swing forward and drive the longitudinal rod to move forward, and the longitudinal rod drives the double rocker group and the backrest connecting member to move forward together, and the double rocker group and the backrest connecting member remain stationary relative to the longitudinal rod; Switching from TV posture to lying posture: in TV posture, the linear actuator continues to drive the first, second and third double swing arm groups to swing forward, and the longitudinal rod continues to move forward. While the longitudinal rod drives the double rocker group and the backrest connecting part to move forward together, the double rocker group swings forward on the longitudinal rod, and the backrest connecting part moves forward and rotates backward relative to the longitudinal rod under the action of the double rocker group.

3. The method for using the sports sofa according to claim 2, characterized in that: The preset linkage displacement mechanism includes a preset double rocker group: the lower end of the first rocker is rotatably connected to the longitudinal rod, the lower end of the second rocker is rotatably connected to the rear end of the longitudinal rod, the front end of the connecting rod is rotatably connected to the first rocker, and the rear end of the connecting rod is rotatably connected to the second rocker; the front end of the backrest connecting piece is rotatably connected to the upper end of the first rocker.

4. The method for using the sports sofa according to claim 3, characterized in that: The preset double rocker group also includes a motion trajectory of the preset double rocker group: the lower end of the second auxiliary rod is rotatably set on the base, and the upper end of the second auxiliary rod is rotatably connected to the second rocker; when switching from a sitting position to a TV position, the upper end of the second auxiliary rod rotates forward, so that the second swing rod moves forward with the longitudinal rod; when switching from the TV position to a lying position, the upper end of the second auxiliary rod moves downward, driving the second swing rod to rotate on the longitudinal rod.

5. The method for using the sports sofa according to claim 4, characterized in that: The second rocker includes a linkage part and a driving part, wherein the linkage part is connected to the driving part at one end, the other end of the linkage part is rotationally connected to the second auxiliary rod, and the other end of the driving part is rotationally connected to the backrest connecting piece.

6. The method for using the sports sofa according to claim 5, characterized in that: The second rocker is V-shaped, with an included angle between the linkage part and the driving part and a corner formed at the connection between the two. The second rocker is rotatably connected to the longitudinal rod at the corner.

7. The method for using the sports sofa according to claim 5, characterized in that: A first auxiliary rod is arranged between the backrest connecting member and the second rocker, and two ends of the first auxiliary rod are rotatably connected to the driving parts of the backrest connecting member and the second rocker respectively.

8. The method for using the sports sofa according to claim 7, characterized in that: A connecting plate extending backwards is fixedly connected to the rear end of the backrest connecting piece, and the connecting plate is rotatably connected to the first auxiliary rod.

9. The method for using the sports sofa according to claim 3, characterized in that: The connecting rod is rotatably connected to the middle parts of the first rocking arm and the second rocking arm.

10. The method for using the sports sofa according to claim 2, characterized in that: The preset linkage displacement mechanism also includes a preset double swing arm group: the first swing link and the second swing link are arranged at a front-to-rear interval and the lower ends of both are rotatably connected to the base; the upper end of the third swing link and the upper end of the fourth swing link are rotatably connected to the longitudinal rod; the fifth swing link is rotatably connected to the first swing link and the third swing link respectively, so that the first swing link, the third swing link and the fifth swing link are linked; the sixth swing link is rotatably connected to the second swing link and the fourth swing link respectively, so that the second swing link, the fourth swing link and the sixth swing link are linked.

11. The method for using the sports sofa according to claim 10, characterized in that: A first longitudinal link and a second longitudinal link are also provided between the fifth swing link and the sixth swing link to link the fifth swing link with the sixth swing link; the two ends of the first longitudinal link are respectively rotatably connected to the lower end of the first swing link and the lower end of the sixth swing link; the two ends of the second longitudinal link are respectively rotatably connected to the upper end of the first swing link and the upper end of the sixth swing link.

12. The method for using the sports sofa according to claim 11, characterized in that: The lower ends of the third swing link and the fourth swing link are both rotatably connected to the first longitudinal link.

13. The method for using the sports sofa according to claim 11, characterized in that: A linkage rod is also provided between the first swing link or the second swing link and the second longitudinal link for rotational connection.

14. The method for using the sports sofa according to claim 10, characterized in that: The upper end of the first swing link is rotatably connected to the upper part of the fifth swing link, and the upper end of the second swing link is rotatably connected to the upper part of the sixth swing link.

15. The method for using the sports sofa according to claim 10, characterized in that: The first swing link is substantially parallel to the second swing link, the third swing link is substantially parallel to the fourth swing link, and the fifth swing link is substantially parallel to the sixth swing link.

Images