Use method of waist rest movement module in seat

Abstract

The invention provides a use method of a waist rest movement module in a seat, which comprises the following steps: pre-assembling a waist support piece and two support arms into a module, and rotationally connecting the two support arms with the waist support piece respectively; two connecting positions are respectively preset on the back bracket and the chassis; the module can be independently transported and packaged, the two supporting arms can be directly connected to the two connecting positions respectively during installation, so that waist-back linkage is achieved, and when the back supporting piece tilts backwards, the waist supporting piece abuts forwards relative to the back supporting piece; the modules can be detached independently, the space utilization rate is increased, the packaging and transporting cost is lower, meanwhile, after the modules, the back support and the base plate are installed, more effective supporting can be provided for the waist of the human body when the back supporting piece tilts backwards, and comfort is improved.

Description

Technical Field

[0001] The invention relates to the field of furniture, and in particular to a method for using a lumbar support motion module in a seat. Background Art

[0002] There are many categories of existing traditional seats. Many manufacturers focus on the field of office chairs. Focusing on ergonomics and improving comfort, the functions of office chairs are becoming more and more complete, such as seat adjustment, armrest adjustment, headrest adjustment and backrest adjustment, etc., all to allow users to have a sitting posture that suits them and get a comfortable sitting experience.

[0003] There is a kind of chair with a lumbar support protruding forward from the chair back, which can provide additional lumbar support for the human body to improve comfort, but this chair has two obvious disadvantages: first, if the lumbar support is installed together with the chair back during shipment, since the lumbar support protrudes from the chair back, this will increase the cost of packaging and transportation; if the lumbar support and the chair back are not installed together during shipment, the installation steps left for consumers will be more cumbersome; second, although the lumbar support can provide additional lumbar support for the human body when sitting normally, when lying down to rest, the lumbar support tilts backwards with the chair back, so that the lumbar support can no longer fit the human waist, and there is a gap between the waist and the lumbar support. Therefore, when lying down to rest, this chair has poor support for the waist. Summary of the invention

[0004] In order to solve the above-mentioned technical problems, the present invention provides a method for using a lumbar support motion module in a seat, wherein a lumbar support member and two support arms are pre-assembled into a module, and the two support arms are rotatably connected to the lumbar support member respectively; two connection positions are preset on the back bracket and the chassis respectively; the module can be transported and packaged separately, and during installation, the two support arms can be directly connected to the two connection positions respectively, thereby realizing lumbar and back linkage, and when the back support member tilts backward, the lumbar support member is pushed forward relative to the back support member; the module can be removed separately, which improves space utilization and reduces packaging and transportation costs. At the same time, after the module is installed with the back bracket and the chassis, it can provide more effective support for the human waist when the back support member tilts backward, thereby improving comfort.

[0005] The technical solution of the present invention is achieved in this way: A method for using a lumbar support motion module in a seat: The waist support member and the two support arms are preassembled into a module, and the two support arms are respectively rotatably connected to the waist support member; two connection positions are respectively preset on the back support and the chassis; During packaging and transportation, the module, back support and chassis are in a relatively independent and separated state, and the module is packaged and transported independently of the back support and chassis; When assembling and using, the consumer installs the module with the back bracket and chassis; When the module is installed with the back support and the chassis, the two support arms are connected to the two connection positions respectively; at this time, one of the support arms is rotatably connected with the back support and the lumbar support is linked with the back support on the back support, and the other support arm is connected with the chassis and a transverse axis extending in the left-right direction is formed at the rotational connection position between the support arm and the lumbar support; when the back support tilts and rotates backward relative to the chassis, the transverse axis remains stationary relative to the chassis, and the lumbar support rotates around the transverse axis and pushes forward relative to the back support.

[0006] The lumbar support member and the two support arms are integrated into one module, so that the space utilization rate becomes higher during packaging and transportation. Since the lumbar support module has been assembled and does not need to be assembled by the consumer, it can be packaged and transported separately from the back support member to reduce the packaging and transportation costs, and it can also be easy for the consumer to assemble. Moreover, after installation, the back support member has a position that moves backward relative to the chassis when it tilts backward, and since the lumbar support member has a stationary transverse axis relative to the chassis, the lumbar support member as a whole will not move backward relative to the chassis when it rotates around the transverse axis. Therefore, the lumbar support member is located in front of the back support member, and the lumbar support member at the front can effectively support the waist in a more ergonomic manner, thereby achieving a better support effect.

[0007] Preferably, a first connection position is formed on the chassis, and the support arm connected to the chassis is the first support arm; when the module is installed on the chassis, the first support arm is plugged into the chassis and locked by an elastic buckle, and the waist support member is rotatably installed on the chassis. After the chassis and the first support arm are plugged into each other, the elastic buckle is automatically locked, and the assembly is convenient and easy for consumers to assemble.

[0008] Preferably, the first support arm is provided with a plug-in portion protruding forward, and an interface is provided on the plug-in portion; the chassis is provided with a plug-in piece extending backward at the first connection position, and when the module is installed with the chassis, the plug-in piece is inserted into the plug-in portion from the interface.

[0009] Preferably, the plug-in portion comprises an elastic buckle, and the plug-in piece is provided with a buckle hole. When the plug-in piece is inserted into the plug-in portion, the elastic buckle is snapped into the buckle hole.

[0010] Preferably, a second connection position is formed on the back support, and the support arm connected to the back support is the second support arm; when the module is installed on the back support, the second support arm is rotatably connected to the back support at the second connection position, and the waist support member is linked to the back support member. The second support arm is rotatably connected to the waist support member and the back support member, and when the back support member and the back support member tilt backward together, the back support member drives the second support arm to move, and the second support arm drives the waist support member to move, thereby realizing waist-back linkage.

[0011] Preferably, the second support arm has an open receiving groove, in which a rotation groove is also formed; the back bracket is provided with a rotation boss at the second connection position, and the rotation boss enters the rotation groove and is rotationally connected to the second support arm via a rotating shaft.

[0012] Preferably, after the rotating boss enters the rotating groove, the limiting block is installed in the open receiving groove, and the limiting block and the second support arm are locked by a fastener. The limiting block can seal the receiving groove and limit the rotating boss in the rotating groove, maintaining the connection stability between the second support arm and the bracket.

[0013] Preferably, the two support arms are a rotating support frame and a linkage member respectively; when the module is installed with the back support and the chassis, the rotating support frame is connected to the chassis, and the two remain relatively still after being connected; the linkage member is rotationally connected to the back support; when the waist support member and the two support arms are preassembled into a module, the rotating support frame is rotationally connected to the lower end of the waist support member, and the linkage member is rotationally connected to the upper end of the waist support member. The advantage of preassembling into a single module is that the module can be packaged and transported separately to increase space utilization during packaging and transportation, thereby reducing the cost of packaging and transportation and improving the benefits of the manufacturer; and consumers do not need to install the waist support member, the rotating support frame and the linkage member, which is convenient for users.

[0014] Preferably, the transverse axis is located at the rotation connection point between the rotating support frame and the lumbar support member. The lumbar support member only rotates on the rotating support frame, and will not produce relative displacement with the lumbar support member. Since the rotating support frame and the chassis are relatively statically installed, the lumbar support member will not produce displacement relative to the chassis; therefore, when the back support member tilts backward and rotates and moves backward relative to the chassis, the lumbar support member will not produce displacement relative to the chassis, so the back support member has a backward displacement relative to the lumbar support member, that is, the lumbar support member is relative to the front of the back support member, and the front lumbar support member more reasonably and effectively supports the waist of the person lying on it, and the comfort is higher.

[0015] Preferably, the rotating support frame has two left and right arms, the upper end of each arm is rotatably connected to the waist support member, each arm has a rotation connection point with the waist support member, and the transverse axis passes through the two rotation connection points. The rotating support frame has two arms, both arms are rotatably connected to the waist support member, and the connection stability between the waist support member and the rotating support frame is improved, and the rotation of the waist support member is also more stable. The waist support member rotates strictly around the transverse axis, and the waist support member will not produce forward and backward deflection.

[0016] Preferably, when the back support rotates backward relative to the chassis, the transverse axis remains stationary relative to the chassis, and the waist support rotates around the transverse axis and moves forward relative to the back support, comprising: A first rotation point is formed between the lumbar support and the support arm rotatably connected to the back bracket; the back support has an initial state and a reclining state, and when the back support rotates backward relative to the chassis to the reclining state, the lumbar support is synchronously linked, and while the lumbar support rotates backward, relative rotation and relative movement occur between the lumbar support and the back support, and the angle between the lumbar support and the back support decreases; at this time, the position of the transverse axis relative to the chassis remains unchanged, but the transverse axis and the first rotation point are away from the back support relative to the initial state so that the lumbar support is positioned closer to the front relative to the back support.

[0017] Since the back support and the lumbar support are independently rotatably connected to the chassis, that is, the rotation connection point of the back support and the chassis does not coincide with the transverse axis, when the back support and the lumbar support move, the two rotate around different rotation points, thereby causing the lumbar support and the back support to produce relative movement, which is the basis for changing the lumbar and back support curves of the seat in different states, and also the basis for improving the lumbar support; further, when the back support and the lumbar support move, although the back bracket only rotates relative to the chassis, according to the prior art and actual objects, we can also know that for the area on the back support that supports the back, when the back support rotates, this area moves backward and downward. The lumbar support is movable, while the transverse axis of the lumbar support remains relatively stationary, and the movement of the lumbar support can only be rotation around the transverse axis; and a first rotation point that can move relative to the back support is provided between the lumbar support and the back support, for one thing to realize the linkage between the back support and the lumbar support, and for another to cooperate with the transverse axis to prevent the lumbar support from being moved by the back support and forming a large relative displacement with the chassis, thereby maintaining a roughly unchanged support height of the lumbar support. Due to the relative displacement between the back support and the chassis, its support height will change, while the support height of the lumbar support remains roughly unchanged, which will cause a change in the lumbar-back support curve formed by the back support and the lumbar support.

[0018] Specifically, from the perspective of the supporting positions of the back support and the lumbar support in the front-to-back direction, in the initial state, that is, when the human body is sitting normally, the supporting position of the lumbar support is closer to the front and the position of the back support is closer to the back, thereby generating a supporting curve that fits the S-shaped waist and back curve of the human body when sitting; from the perspective of the supporting heights of the back support and the lumbar support, in the initial state, the supporting height of the lumbar support is lower than the supporting height of the back support. After both the back support and the lumbar support are rotated, the supporting height of the back support is significantly reduced, while the supporting height of the lumbar support is only slightly reduced due to the unchanged transverse axis. It is precisely because of the change in the relative heights of the two that the supporting curve in the reclining state is more in line with the roughly linear waist and back curve of the human body when lying down. Therefore, this method can ergonomically improve the chair's support for the waist, so that the waist can be reasonably and effectively supported, without a feeling of empty waist, greatly improving the comfort of use, and avoiding health risks to the human waist.

[0019] The design starting point, concept and beneficial effects of the present invention using the above technical solution are: The lumbar support member and the two support arms are integrated into one module, so that the space utilization rate becomes higher during packaging and transportation. Since the lumbar support module has been assembled and does not need to be assembled by the consumer, it can be packaged and transported separately from the back support member to reduce the packaging and transportation costs, and it can also be easy for the consumer to assemble. Moreover, after installation, the back support member has a position that moves backward relative to the chassis when it tilts backward, and since the lumbar support member has a stationary transverse axis relative to the chassis, the lumbar support member as a whole will not move backward relative to the chassis when it rotates around the transverse axis. Therefore, the lumbar support member is located in front of the back support member, and the lumbar support member at the front can effectively support the waist in a more ergonomic manner, thereby achieving a better support effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure after the module, the back support and the chassis are installed in the embodiment of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure after the module, the back support and the chassis are separated in the embodiment of the present invention; Figure 3 Schematic diagram of the three-dimensional structure of the module in the embodiment of the present invention Figure 1 ; Figure 4 Schematic diagram of the three-dimensional structure of the module in the embodiment of the present invention Figure 2 ; Figure 5 An exploded view of a lumbar support member and a linkage member in an embodiment of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the rotating support frame in the embodiment of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the chassis in the embodiment of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the linkage member in the embodiment of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the back support in an embodiment of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the limit block in the embodiment of the present invention; Fig.11 It is a side view of the module, the back support and the chassis after being installed in the embodiment of the present invention; Fig.12 It is a side view of the embodiment of the present invention when the module, back support and chassis are all disassembled for packaging and transportation; Fig.13It is a schematic diagram of the linkage between the lumbar support and the back support when the module, the back support and the chassis are installed and used in an embodiment of the present invention.

[0021] The figures are marked as follows: lumbar support member 1; back support 2; chassis 3; rotating support frame 4; linkage member 5; base 6; socket 7; waist-shaped hole 8; moving axis 9; accommodating groove 10; rotating groove 11; rotating convex seat 12; limit block 13; positioning bar 14; positioning groove 15; support arm 16; plug-in part 17; interface 18; plug-in sheet 19; elastic buckle 20; buckle hole 21; back support member 22. DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] The specific implementation methods of the present invention are as follows: like Figure 1 , 2 As shown in Figure 13, the present invention provides a method for using a lumbar support motion module in a seat: The waist support 1 and the two support arms are preassembled into a module, and the two support arms are rotatably connected to the waist support 1; two connection positions are preset on the back support 2 and the chassis 3 respectively; During packaging and transportation, the module, the back support 2 and the chassis 3 are in a relatively independent and separated state, and the module is packaged and transported independently of the back support 2 and the chassis 3; When assembling and using, the consumer installs the module with the back bracket 2 and the chassis 3; When the module is installed with the back support 2 and the chassis 3, the two support arms are connected to the two connection positions respectively; at this time, one of the support arms is rotatably connected with the back support 2 and enables the lumbar support 1 to be linked with the back support 22 on the back support 2, and the other support arm is connected with the chassis 3 and forms a transverse axis A extending in the left-right direction at the rotational connection position between the support arm and the lumbar support 1; when the back support 22 tilts and rotates backward relative to the chassis 3, the transverse axis A remains stationary relative to the chassis 3, and the lumbar support 1 rotates around the transverse axis A and pushes forward relative to the back support 22.

[0026] like Figure 2 , 11 As shown in Figures 1 and 12, the lumbar support member 1 and the two support arms are integrated into one module, and the space utilization rate becomes higher during packaging and transportation. Since the lumbar support module has been assembled and does not need to be assembled by the consumer, it can be packaged and transported separately from the back support member 22 to reduce the packaging and transportation costs, and it can also be easy for the consumer to assemble. Moreover, after installation, the back support member 22 has a position that moves backward relative to the chassis 3 when it tilts backward, and the lumbar support member 1 is stationary relative to the chassis 3 because the transverse axis A of the lumbar support member 1 is stationary relative to the chassis 3. When the lumbar support member 1 rotates around the transverse axis A, the lumbar support member 1 will not move backward relative to the chassis 3 as a whole. Therefore, the lumbar support member 1 is pushed forward relative to the back support member 22, and the forward-pushed lumbar support member 1 can more ergonomically support the waist effectively and achieve a better support effect.

[0027] When the back support member 22 tilts and rotates backward relative to the chassis 3, the transverse axis A remains stationary relative to the chassis 3, and the waist support member 1 rotates around the transverse axis A and moves forward relative to the back support member 22, including: A first rotation point B is formed between the lumbar support 1 and the support arm rotatably connected to the back bracket 2; the back support 22 has an initial state and a reclining state. When the back support 22 rotates backward relative to the chassis 3 to the reclining state, the lumbar support 1 is synchronously linked. While the lumbar support 1 rotates backward, the lumbar support 1 also generates relative rotation and relative movement with the back support 22, and the angle between the lumbar support 1 and the back support 22 is reduced; at this time, the position of the transverse axis A relative to the chassis 3 remains unchanged, but the transverse axis A and the first rotation point B are away from the back support 22 relative to the initial state so that the lumbar support 1 is located closer to the front relative to the back support 22.

[0028] Since the back support 22 and the lumbar support 1 are independently rotatably connected to the chassis 3, that is, the rotation connection point of the back support 22 and the chassis 3 does not coincide with the transverse axis A, when the back support 22 and the lumbar support 1 move, the two rotate around different rotation points, so that the lumbar support 1 and the back support 22 produce relative movement, which is the basis for changing the lumbar and back support curves of the seat in different states, and is also the basis for improving the lumbar support. Furthermore, when the back support 22 and the lumbar support 1 move, although the back bracket 2 only rotates relative to the chassis 3, according to the prior art and actual objects, we can also know that for the area on the back support 22 that supports the back, when the back support 22 rotates, this area moves backward and downward. , while the transverse axis A of the lumbar support 1 remains relatively still, and the movement of the lumbar support 1 can only be rotation around the transverse axis A; and a first rotation point B that can move relative to the back support 22 is provided between the lumbar support 1 and the back support 22, for one thing to realize the linkage between the back support 22 and the lumbar support 1, and for another thing to cooperate with the transverse axis A to prevent the lumbar support 1 from being moved by the back support 22 and forming a large relative displacement with the chassis 3, thereby maintaining a substantially unchanged support height of the lumbar support 1. Due to the relative displacement between the back support 22 and the chassis 3, its support height will change, while the support height of the lumbar support 1 remains substantially unchanged, which will cause the lumbar-back support curve formed by the back support 22 and the lumbar support 1 to change.

[0029] Specifically, if Fig.13 As shown, from the support position of the back support 22 and the lumbar support 1 in the front-to-back direction, in the initial state, that is, when the human body is sitting normally, the support position of the lumbar support 1 is closer to the front and the position of the back support 22 is closer to the back, so a support curve that fits the S-shaped waist and back curve of the human body when sitting is generated; from the supporting height of the back support 22 and the lumbar support 1, in the initial state, the support height of the lumbar support 1 is lower than the support height of the back support 22. After the back support 22 and the lumbar support 1 are rotated, the support height of the back support 22 is significantly reduced, while the support height of the lumbar support 1 is only slightly reduced due to the unchanged transverse axis A. It is precisely because of the change in the relative heights of the two that the support curve in the reclining state is more in line with the roughly linear waist and back curve of the human body when lying down. Therefore, this method can ergonomically improve the support of the chair to the waist, so that the waist can be reasonably and effectively supported, and there will be no feeling of empty waist, which greatly improves the comfort of use and avoids health risks to the human waist.

[0030] In the above method, the two support arms are respectively a first support arm and a second support arm, a first connection position is formed on the chassis 3, and a second connection position is formed on the back bracket 2, the first support arm is connected to the chassis 3 at the first connection position, and the second support arm is connected to the back bracket 2 at the second connection position; when the module is installed with the back bracket 2 and the chassis 3, the first support arm is locked by the elastic buckle 20 after being plugged into the chassis 3, and the lumbar support 1 is rotatably installed on the chassis 3 relative to the first support arm; the second support arm is rotatably connected to the back bracket 2 at the second connection position, and the lumbar support 1 is linked with the back support 22; after the chassis 3 is plugged into the first support arm, the elastic buckle 20 is automatically locked, and the assembly is convenient and easy for consumers to assemble; the second support arm is rotatably connected to the lumbar support 1 and the back bracket 2, and when the back support 22 and the back bracket 2 tilt backward together, the back bracket 2 drives the second support arm to move, and the second support arm drives the lumbar support 1 to move, thereby realizing the waist-back linkage.

[0031] Specifically, if Figure 2-4 As shown, the first support arm is a rotating support frame 4, and the second support arm is a linkage member 5. When the module is installed with the back support 2 and the chassis 3, the rotating support frame 4 is connected to the chassis 3, and the two remain relatively still after being connected; the linkage member 5 is rotationally connected to the back support 2; when the lumbar support 1 and the two support arms are pre-assembled into a module, the rotating support frame 4 is rotationally connected to the lower end of the lumbar support 1, and the linkage member 5 is rotationally connected to the upper end of the lumbar support 1; the advantage of preassembling into a single module is that the module can be packaged and transported separately to increase space utilization during packaging and transportation, thereby reducing the cost of packaging and transportation and improving the manufacturer's benefits; and consumers do not need to install the lumbar support 1, the rotating support frame 4 and the linkage member 5, which is convenient for users.

[0032] like Figure 3-5As shown, the linkage member 5 is a connecting rod, the upper end of the linkage member 5 is rotatably connected to the upper end of the waist support member 1, and the lower end of the linkage member 5 is rotatably connected to the back support 2; further, a buffer assembly is installed on the upper end of the waist support member 1, and the buffer assembly is rotatably connected to the linkage rod, so that when the back support member 22 leans back, the waist support member 1 changes its posture relative to the back support member 22, and also has the ability of floating buffering, which makes the user's waist lean on it more comfortable, and secondly, it can reduce the possibility of movement restriction or interference when the waist and back are linked, and increase the adaptive ability of the waist support member 1 when the waist is linked; the buffer assembly includes a base 6 and a socket 7 The socket 7 is fixedly connected to the upper end of the lumbar support member 1, the socket 7 is inserted in the base 6, the socket 7 and the base 6 are slidably matched, and the base 6 is rotatably connected to the linkage member 5; a waist-shaped hole 8 is provided on the socket 7, the linkage member 5 and the base 6 are rotatably connected through a motion shaft 9, and the motion shaft 9 is inserted in the waist-shaped hole 8; the buffer component also includes a spring, the socket 7 is hollow, the spring is arranged in the socket 7, the spring acts on the motion shaft 9 and the socket 7 and gives the lumbar support member 1 a forward elastic force; the cooperation of the waist-shaped hole 8 and the motion shaft 9 realizes the possibility of movement of the socket 7 and the base 6, stipulates the trajectory of movement of the two, and also prevents the socket 7 from being detached from the base 6.

[0033] like Figure 8-10 As shown, the lower end of the linkage member 5 is provided with a receiving groove 10 which is open forward and downward, and a rotation groove 11 is formed at the positions of the left and right ends of the receiving groove 10; the back bracket 2 is provided with two rotating convex seats 12 at the second connection position, and the two rotating convex seats 12 respectively enter the two rotating grooves 11 and are rotationally connected with the linkage member 5 through the rotating shaft; after the rotating convex seats 12 enter the rotating grooves 11, a stop block 13 is used to install them into the open receiving groove 10, and the stop block 13 is locked with the second support arm by a fastener, and the fastener The limiting block 13 is a screw; a notch is formed at the lower end thereof, and the notch can avoid the rotating protrusion 12 when the linkage 5 and the back bracket 2 rotate; the limiting block 13 can seal the accommodating groove 10 and limit the rotating protrusion 12 in the rotating groove 11, so as to maintain the connection stability between the second support arm and the bracket; a positioning strip 14 protruding backward is provided on the limiting block 13, and a positioning slot 15 is correspondingly provided in the accommodating groove 10. When the limiting block 13 is installed in the accommodating groove 10, the positioning strip 14 enters the positioning slot 15 to quickly position the limiting block 13.

[0034] The rotating support frame 4 is a U-shaped frame, and the transverse axis A is located at the rotating connection point between the rotating support frame 4 and the lumbar support member 1; the lumbar support member 1 only rotates on the rotating support frame 4, and will not produce relative displacement with the lumbar support member 1, and because the rotating support frame 4 and the chassis 3 are relatively statically installed, the lumbar support member 1 will not be displaced relative to the chassis 3; therefore, when the back support member 22 tilts backward and rotates and moves backward relative to the chassis 3, the lumbar support member 1 will not be displaced relative to the chassis 3, so the back support member 22 has a backward displacement relative to the lumbar support member 1, that is, the lumbar support member 1 is pushed forward relative to the back support member 22, and the forward-pushing lumbar support member 1 more reasonably and effectively supports the waist of the human body lying thereon, and is more comfortable.

[0035] Specifically, if Figure 3 , 4 As shown in , 6 and 7, the rotating support frame 4 has two left and right support arms 16, and the upper end of each support arm 16 is rotatably connected to the lumbar support member 1, and each support arm 16 has a rotation connection point with the lumbar support member 1, and the transverse axis A passes through these two rotation connection points; the rotating support frame 4 has two support arms 16, and the two support arms 16 are rotatably connected to the lumbar support member 1, and the connection stability between the lumbar support member 1 and the rotating support frame 4 is improved, and the rotation of the lumbar support member 1 is also more stable, and the lumbar support member 1 strictly rotates around the transverse axis A, and the lumbar support member 1 will not produce forward and backward deflection.

[0036] In the connection between the rotating support frame 4 and the chassis 3, the rotating support frame 4 is provided with a plug-in portion 17 protruding forward, and an interface 18 is provided on the plug-in portion 17; the chassis 3 is provided with a plug-in piece 19 extending backward at the first connection position, and when the module is installed with the chassis 3, the plug-in piece 19 is inserted into the plug-in portion 17 from the interface 18; the plug-in portion 17 includes an elastic buckle 20, and the plug-in piece 19 has a buckle hole 21. When the plug-in piece 19 is inserted into the plug-in portion 17, the elastic buckle 20 is snapped into the buckle hole 21.

Claims

1. A method for using a lumbar support motion module in a seat, characterized in that: The waist support member and the two support arms are preassembled into a module, and the two support arms are respectively rotatably connected to the waist support member; two connection positions are respectively preset on the back support and the chassis; During packaging and transportation, the module, back support and chassis are in a relatively independent and separated state, and the module is packaged and transported independently of the back support and chassis; When assembling and using, the consumer installs the module with the back bracket and chassis; When the module is installed with the back support and the chassis, the two support arms are connected to the two connection positions respectively; at this time, one of the support arms is rotatably connected with the back support and the lumbar support is linked with the back support on the back support, and the other support arm is connected with the chassis and a transverse axis extending in the left-right direction is formed at the rotational connection position between the support arm and the lumbar support; when the back support tilts and rotates backward relative to the chassis, the transverse axis remains stationary relative to the chassis, and the lumbar support rotates around the transverse axis and pushes forward relative to the back support.

2. The method for using the lumbar support motion module in a seat according to claim 1, characterized in that: A first connection position is formed on the chassis, and the support arm connected to the chassis is the first support arm; when the module is installed on the chassis, the first support arm is plugged into the chassis and locked by an elastic buckle, and the waist support member is rotatably installed on the chassis.

3. The method for using the lumbar support motion module in a seat according to claim 2, characterized in that: The first support arm is provided with a plug-in portion protruding forward, and an interface is provided on the plug-in portion; the chassis is provided with a plug-in piece extending backward at the first connection position, and when the module is installed with the chassis, the plug-in piece is inserted into the plug-in portion from the interface.

4. The method for using the lumbar support motion module in a seat according to claim 3, characterized in that: The plug-in part comprises an elastic buckle, and the plug-in piece is provided with a buckle hole. When the plug-in piece is inserted into the plug-in part, the elastic buckle is snapped into the buckle hole.

5. The method for using the lumbar support motion module in a seat according to claim 1, characterized in that: A second connection position is formed on the back support, and the support arm connected to the back support is the second support arm; when the module is installed with the back support, the second support arm is rotationally connected with the back support at the second connection position, and the waist support member is linked with the back support member.

6. The method for using the lumbar support motion module in a seat according to claim 5, characterized in that: The second support arm has an open receiving groove, and a rotation groove is also formed in the receiving groove; the back bracket is convexly provided with a rotation boss at the second connection position, and the rotation boss enters the rotation groove and is rotationally connected with the second support arm through a rotating shaft.

7. The method for using the lumbar support motion module in a seat according to claim 6, characterized in that: After the rotating protrusion enters the rotating groove, the limiting block is installed in the open receiving groove, and the limiting block and the second supporting arm are locked by a fastener.

8. The method for using the lumbar support motion module in a seat according to claim 1, characterized in that: The two support arms are a rotating support frame and a linkage member respectively; when the module is installed with the back support and the chassis, the rotating support frame is connected to the chassis, and the two remain relatively stationary after being connected; the linkage member is rotationally connected to the back support; when the lumbar support member and the two support arms are pre-assembled into a module, the rotating support frame is rotationally connected to the lower end of the lumbar support member, and the linkage member is rotationally connected to the upper end of the lumbar support member.

9. The method for using the lumbar support motion module in a seat according to claim 8, characterized in that: The transverse axis is located at the rotation connection point between the rotation support frame and the waist support member.

10. The method for using the lumbar support motion module in a seat according to claim 9, characterized in that: The rotating support frame has two left and right arms, the upper end of each arm is rotatably connected to the waist support member, each arm and the waist support member have a rotating connection point, and the transverse axis passes through the two rotating connection points.

11. The method for using the lumbar support motion module in a seat according to claim 1, characterized in that: When the back support member tilts and rotates backward relative to the chassis, the transverse axis remains stationary relative to the chassis, and the waist support member rotates around the transverse axis and moves forward relative to the back support member, comprising: A first rotation point is formed between the lumbar support and the support arm rotatably connected to the back bracket; the back support has an initial state and a reclining state, and when the back support rotates backward relative to the chassis to the reclining state, the lumbar support is synchronously linked, and while the lumbar support rotates backward, relative rotation and relative movement occur between the lumbar support and the back support, and the angle between the lumbar support and the back support decreases; at this time, the position of the transverse axis relative to the chassis remains unchanged, but the transverse axis and the first rotation point are away from the back support relative to the initial state so that the lumbar support is positioned closer to the front relative to the back support.

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