Vehicle seat

Abstract

One or more embodiments of the present application provide a vehicle seat. The vehicle seat can include a seat cushion frame, and a seat back frame movable between a folded position and a use position. The seat back frame can include first and second longitudinal supports, and first and second ribs transversely supported on the first and second longitudinal supports. The first and second ribs can be movable along the first and second longitudinal supports to vary a distance between the first and second ribs.

Description

[Technical Field]

[0001] This application relates to a foldable vehicle seat. [Background Technology]

[0002] Modern vehicles may include rear seats or even a third row of seats that can accommodate multiple passengers. These rear and third-row seats can often be folded down to provide more space when cargo needs to be loaded. However, the seat backs and cushions are quite thick, and even when folded down, the seat backs sit directly on top of the seat cushions, still taking up considerable space.

[0003] For example, US6,199,951 discloses a foldable seat including a deformable component located in at least one of the seat cushion or backrest, the deformable component being able to change the shape and / or height of the seat back / seat cushion to achieve a minimum folding height when the seat back and seat cushion overlap.

[0004] The inventors realized that existing seats still cannot achieve the smallest possible space occupation, and therefore needed to provide a seat and adjustment mechanism to solve at least one of the space occupation problems of existing seats.

[0005] [Application Content]

[0006] According to one aspect of this application, a vehicle seat is provided. The vehicle seat may include a seat cushion frame and a seat back frame movable between a folded position and a used position (open position). The seat back frame may include first and second longitudinal supports, and first and second ribs laterally supported on the first and second longitudinal supports. The first and second ribs are movable along the first and second longitudinal supports to change the distance between them.

[0007] In one embodiment, the vehicle seat may further include a covering that covers the first and second ribs. The first and second ribs may be substantially perpendicular to the first and second longitudinal supports, and the sides of the first and second ribs closest to the user may have different shapes.

[0008] In another embodiment, in the folded position, the first and second ribs are movable to the top of the seat back frame. When the seat back frame is folded onto the seat cushion frame, the first and second ribs are generally located outside the projection of the seat cushion frame onto the seat back frame to reduce the space occupied by the vehicle seat in the folded position.

[0009] In yet another embodiment, the vehicle seat includes a backrest pivoting mechanism and a first transmission mechanism connected to and drivably connected to the backrest pivoting mechanism, which is connected to the first rib and the second rib. The first transmission mechanism is disposed adjacent to the first longitudinal support, and during seat back folding or unfolding, the pivoting mechanism drives the first transmission mechanism and moves the first and second ribs along the first and second longitudinal supports.

[0010] In yet another embodiment, the vehicle seat may further include a fixed gear fixedly connected to a seat back pivoting mechanism. The first transmission mechanism includes a drive gear drivably engaged with the fixed gear, a first pulley coaxially connected to the drive gear, a second pulley pivotally connected to the top of the seat back frame away from the first pulley, and a transmission belt tensioned between the first and second pulleys.

[0011] In another embodiment, the first rib is closer to the top of the seat back frame than the second rib. The first rib may include a first rib-end gear located at a first end and a first synchronizer connected to the first rib. The first longitudinal support may include a first rack surface capable of meshing with the first rib-end gear. In a synchronized state, the first synchronizer can hold the drive belt therebetween, and the first synchronizer can drive the first rib-end gear to move along the first rack surface of the first longitudinal support as the drive belt moves.

[0012] In another embodiment, the first rib may include a first protruding shaft supporting a gear at the end of the first rib, and a first synchronizer may be sleeved on the first protruding shaft. The first synchronizer may include a first base fixedly connected to the first rib, a first synchronization component connected to the first base, and a second synchronization component movable relative to the first base under the action of force. In a synchronized state, the first synchronization component, close to the second synchronization component, clamps the drive belt between them.

[0013] In another embodiment, the first synchronization component may be a first synchronization rack, and the second synchronization component may be a second toothed component. The second synchronization component may include a first handle extending laterally away from the first rib and along the first rib; pushing the first handle in a direction away from the first synchronization rack can separate the first and second synchronization components.

[0014] In yet another embodiment, the second synchronization component may include a first slider that is slidable relative to the first base on the main plane of the first base, and a second toothed component may be formed on the first slider. The first base includes a biasing device that is always relatively biased such that the first slider is directed toward the first synchronization component to press the drive belt.

[0015] In another embodiment, the first rib may include a first protruding shaft supporting a gear at the end of the first rib, and a first synchronizer may be sleeved on the first protruding shaft. The first synchronizer may include a first base fixedly connected to the first rib, a first slider located on the main plane of the first base and slidable relative to the first base, a first synchronization component connected to the first base, and a second synchronization component disposed on the first slider. The first synchronization component includes a first synchronization gear connected to the first base, and the second synchronization component includes a ratchet and a pawl supported on the first slider. In a synchronized state, the ratchet and the first synchronization gear clamp a drive belt.

[0016] In yet another embodiment, the second synchronization component may include a pair of longitudinally aligned first synchronization gears.

[0017] In yet another embodiment, the second rib may have the same construction as the end structure of the first rib.

[0018] In another embodiment, the vehicle seat may further include a second transmission mechanism connected to the first and second ribs and drivably connected to the seat back pivot mechanism. The second transmission mechanism is adjacent to the second longitudinal support and includes a second drive belt. The first rib may further include a second rib end gear located at a second end and a second synchronizer connected to the second end. The second longitudinal support may include a second rack surface capable of meshing with the second rib end gear. In a synchronized state, the second synchronizer engages the second drive belt therebetween, and the second synchronizer, as the second drive belt moves, drives the second rib end gear to move along the second rack surface of the second longitudinal support.

[0019] In another embodiment, the second rib may include a third rib end gear located at the first end and a third synchronizer connected to the second rib. The third rib end gear may mesh with the first rack surface of the first longitudinal support, and in a synchronized state, the third synchronizer holds the first drive belt therebetween. As the first drive belt moves, the third synchronizer drives the third rib end gear to move along the first rack surface of the first longitudinal support.

[0020] In another embodiment, the first longitudinal support member may include a first stop protrusion and a second stop protrusion protruding from its first surface. A first rib may be engaged with the first stop protrusion, and a second rib may include a groove corresponding to the first stop protrusion, allowing the second rib to be engaged with the second stop protrusion through the first stop protrusion. When the seat is switched from a folded position to an open position, the seat pivoting mechanism can rotate the seat back frame, thereby driving the drive wheel to rotate around a fixed gear, further driving the first pulley to rotate. This causes the drive belt to move with the first pulley and further drives the first and second ribs to move, with the second rib passing through the first stop protrusion and stopping at the second stop protrusion.

[0021] In yet another embodiment, the first and second stop protrusions have inclined stop surfaces that contact the first or second rib.

[0022] In yet another embodiment, the first longitudinal support may include a first separation protrusion and a second separation protrusion arising from a second surface opposite to the first surface. When the first rib and the second rib move to the top of the first longitudinal support, the first and second separation protrusions can separate the first synchronizer, allowing the first and second ribs to move relative to the belt.

[0023] In yet another embodiment, the first rib and the second rib may include a laterally extending rigid inner support and a covering.

[0024] In another embodiment, the number of teeth on the fixed gear can limit the distance the drive belt moves as the seat back frame rotates. When the first and second ribs have moved to the top of the seat back frame with the first drive belt, the drive wheel rotates to the smooth surface of the fixed gear, causing the drive wheel to idle while the first and second ribs remain at the top of the seat back frame. When the first and second ribs have moved to a preset position on the seat back frame with the first drive belt, the drive wheel rotates to the smooth surface of the fixed gear, causing the drive wheel to idle while the first and second ribs remain at the preset position on the seat back frame.

[0025] According to another aspect of this application, a vehicle seat is provided. The vehicle seat may include a seat cushion frame and a seat back frame that moves relative to the seat cushion frame between a folded position and a used position (open position) via a seat back pivoting mechanism. The seat back frame includes first and second longitudinal supports, and first and second ribs laterally supported on the first and second longitudinal supports; and a drive belt connected to the first and second ribs and drivably connected to the seat back pivoting mechanism. The pivoting mechanism drives the drive belt and causes the first and second ribs to move along the first and second longitudinal supports.

[0026] In one embodiment, the vehicle seat may further include a pair of fixed gears located on both sides of the seat and fixedly connected to a seat back pivoting mechanism; a pair of driving gears drivably engaged with the pair of fixed gears; a pair of first pulleys coaxially connected to the pair of driving gears; and a pair of second pulleys located at the top of the seat back frame away from the pair of first pulleys. The drive belt may include a first drive belt and a second drive belt tensioned between the first pulleys and the second pulleys. The first rib may include a first rib-end gear and a second rib-end gear located at its ends, and corresponding first and second synchronizers that engage the first drive belt therebetween. The second rib may include a third rib-end gear and a fourth rib-end gear located at its ends, and corresponding third and fourth synchronizers that engage the second drive belt therebetween. The first longitudinal support includes a first longitudinal rack surface capable of meshing with the corresponding first and third rib-end gears, and the second longitudinal support includes a second longitudinal rack surface capable of meshing with the corresponding second and fourth rib-end gears. As the first transmission belt moves, the first synchronizer and the third synchronizer drive the first rib end gear of the first rib and the third rib end gear of the second rib to move along the first longitudinal rack surface of the first longitudinal support member, respectively; while as the second transmission belt moves, the second synchronizer and the fourth synchronizer drive the second rib end gear of the first rib and the fourth rib end gear of the second rib to move along the second longitudinal rack surface of the second longitudinal support member.

[0027] In another embodiment, the first rib may include a first protruding shaft supporting a gear at the end of the first rib, and a first synchronizer may be sleeved on the first protruding shaft. The first synchronizer may include a first base fixedly connected to the first rib, a first synchronization component located on the first base, and a second synchronization component connected to the first base. The second rib may include a second protruding shaft supporting a gear at the end of the second rib, and a second synchronizer sleeved on the second protruding shaft. The second synchronizer includes a second base fixedly connected to the second rib, a third synchronization component located on the second base, and a fourth synchronization component retractably connected to the second base. In a synchronized state, the first synchronization component cooperates with the second synchronization component, and the third synchronization component cooperates with the fourth synchronization component to clamp the first drive belt therebetween, allowing the first and second ribs to move with the first drive belt.

[0028] In another embodiment, the first base may include a first slider slidably connected to it, and a biasing device that is always relatively biased such that the first slider presses against the first synchronization assembly to engage the first drive belt. The first synchronization assembly may be a first synchronization gear, the second synchronization assembly may include a ratchet and pawl supported on the second slider, the third synchronization assembly may be a third synchronization rack, and the fourth synchronization assembly may be a fourth toothed component. The first and second synchronization assemblies may include first and second handles extending laterally away from and along the first and second ribs, respectively. Compression of the first and second handles can disengage the engagement between the first and second synchronization assemblies, and the engagement between the third and fourth synchronization assemblies, respectively.

[0029] According to another aspect of the present invention, a vehicle seat is provided. The vehicle seat may include a seat cushion frame and a seat back frame that moves relative to the seat cushion frame between a folded position and an open position via a seat back pivoting mechanism. The seat back frame may include first and second longitudinal supports, and a first rib, a second rib, and a third rib that are laterally supported on the first and second longitudinal supports. The first rib is closer to the top of the seat back than the second rib, while the third rib is further away from the top of the seat back than the second rib. The first, second, and third ribs are linearly movable along the first and second longitudinal supports between a use position and a folded position. In the folded position, the first, second, and third ribs are substantially in contact with and close to the top of the seat back; in the use position, the first, second, and third ribs are spaced at predetermined intervals to collectively form a rigid support for the seat back.

[0030] The above-mentioned advantages and other advantages and features of this application will become apparent from reading the following detailed description alone or in conjunction with the accompanying drawings. [Attached Image Description]

[0031] To gain a more complete understanding of the embodiments of this application, reference should be made to the embodiments described in more detail in the accompanying drawings and by way of example below, wherein:

[0032] Figure 1 The illustration schematically shows a seat in one or more embodiments of this application, wherein the seat is in a use position;

[0033] Figure 2 The image schematically illustrates a seat in one or more embodiments of this application, wherein the seat is in a folded position;

[0034] Figure 3 A partial enlarged view of a seat back frame in one or more embodiments of this application is schematically shown, wherein the lateral support ribs of the seat back frame are in a retracted state.

[0035] Figure 4The rear structure of the seat back frame in one or more embodiments of this application is schematically shown;

[0036] Figure 5 A partial enlarged view of the transmission mechanism in one or more embodiments of this application is schematically shown;

[0037] Figure 6 This illustration shows a partially enlarged schematic of the end structure of the transverse support rib and its cooperation with the transmission mechanism in one or more embodiments of this application.

[0038] Figure 7 This illustration shows a partially enlarged schematic of the end structure of the transverse support rib and its cooperation with the transmission mechanism in another embodiment of this application;

[0039] Figure 8 This illustration shows a partially enlarged schematic diagram of the longitudinal support member in another embodiment of this application.

Detailed Implementation Methods

[0040] In the accompanying drawings, the same or similar reference numerals are used to indicate the same or similar parts. In the following description, various operating parameters and parts are described in several embodiments. These specific parameters and parts are included herein by way of example only and are not intended to be limiting.

[0041] Specific embodiments of this application are disclosed herein as needed; however, it should be understood that the disclosed embodiments are merely examples of this application and may be implemented in various alternative forms. The drawings are not necessarily drawn to scale; some features may be enlarged or reduced to show details of specific components. Therefore, the specific structural and functional details disclosed herein should not be construed as limiting, but are merely representative bases for teaching those skilled in the art to implement this application in various forms.

[0042] As mentioned in the background section, although existing vehicles offer rear or third-row seats that can be folded down to provide more space when needed, the seat backs and cushions themselves have a certain thickness. Even after folding, the seat backs are directly stacked on top of the seat cushions, still occupying a considerable amount of space. Therefore, the inventors of this application provide a seat with an adjustable frame and a corresponding adjustment mechanism to solve at least one problem existing in the prior art.

[0043] Figure 1 A seat 10 according to one or more embodiments of this application is schematically shown, wherein the seat 10 is in a use position. The seat cushion, headrest, etc., are omitted in this embodiment to more clearly show the internal structure of the seat 10. It will be understood that the seat 10 can have any suitable seat cushion and headrest configuration. Figure 1As shown, the vehicle seat 10 may include a seat cushion frame 100 and a seat back frame 200 connected to the seat cushion frame 100.

[0044] In such Figure 1 In the illustrated usage configuration, the backrest frame 200 may include a first longitudinal support member 210a and an opposing second longitudinal support member 210b that generally extend along the longitudinal direction T, and a lateral support rib that generally extends along the transverse direction W and is laterally supported on the first and second longitudinal support members 210a and 210b. Figure 1 The displayed lateral support ribs include a first rib 220, a second rib 230, and a third rib 240. It is understood that the first longitudinal support member 210a and the opposing second longitudinal support member 210b can have suitable spacing, and even in some examples, the first and second longitudinal support members 210a and 210b can be partially connected to each other, as long as they can provide support or load-bearing for the lateral support ribs. It is understood that the aforementioned first and second longitudinal support members 210a and 210b generally extend along the longitudinal direction T, i.e., the longitudinal direction T is the length direction of the backrest frame 200. However, this does not mean that the aforementioned first and second longitudinal support members 210a and 210b extend perpendicular to the horizontal plane; they can have a suitable angle of inclination relative to the horizontal plane in the use state. The lateral direction W is the width direction of the backrest frame 200. Furthermore, it is understood that the number of lateral support ribs can be designed as needed, for example, two or more than three. In this embodiment, the seat 10 further includes a flexible covering layer 250 covering the first rib 220, the second rib 230, and the third rib 240. The cover layer 250 can cover the entire seat back frame 200 and can be compressed. Its material can be any suitable design, such as the fabric layer on the surface of a vehicle seat or home chair in the prior art. In one example, the cover layer 250 can be tensioned in the position of use to provide comfortable back support.

[0045] Figure 2 A seat 10 according to one or more embodiments of this application is schematically shown, wherein the seat 10 is in a folded position, and the seat cushion and the cover 250 of the seat back frame 200 are omitted to show the internal structure more clearly. As shown, the seat back frame 200 is detachable from... Figure 1 Fold and stow to the indicated position. Figure 2The folding position is shown. Any suitable folding method and mechanism can be used. In this example, the first rib 220, the second rib 230, and the third rib 240 can be seen moving along the first and second longitudinal supports 210a and 210b to a position 202 near the top of the seat back frame 200. As shown, in the folding position, when the seat back frame 200 is folded onto the seat cushion frame 100, the first rib 220, the second rib 230, and the third rib 240 are generally located outside the projection of the seat cushion frame 100 onto the seat back frame 200, and partially overlap with the seat cushion frame 100 in the illustrated height direction H. That is, the first rib 220, the second rib 230, and the third rib 240 do not increase the height of the seat 10 in the folding position. The back frame 200 in the height direction H can be set to a smaller size, and the flexible covering layer 250 can have a thinner thickness. Therefore, the space occupied by the vehicle seat 10 in the illustrated folding position can be reduced. In other words, in the illustrated height direction H, the folded seat 10 can have the smallest possible height. Furthermore, the weight of the seat 10 can be reduced by using the first rib 220, the second rib 230, the third rib 240 and the flexible cover layer 250 as the backrest.

[0046] Figure 3 A partial enlarged view of a seat back frame 200 according to one or more embodiments of this application is schematically shown, wherein the first rib 220, second rib 230, and third rib 240 of the seat back frame 200 are in a retracted state and located at the top position 202 adjacent to the seat back frame 200. In the embodiment shown, the first rib 220, second rib 230, and third rib 240 are substantially parallel to each other and substantially perpendicular to the first and second longitudinal supports 210A and 210B. In another embodiment, the sides of the first rib 220, second rib 230, and third rib 240 near the user may have different surface shapes, such as different curvatures and / or the first rib 220, second rib 230, and third rib 240 may have different thicknesses to adapt to the structure of the human back, providing better support and comfort. It is understood that the shape and size of the first rib 220, second rib 230, and third rib 240 can be designed as needed.

[0047] Figure 4 The rear structure of the seat back frame 200 in one or more embodiments of this application is schematically shown. For example... Figure 4As shown, in one embodiment, the vehicle seat 10 includes a backrest pivot mechanism 260 and transmission mechanisms 300a and 300b. The first rib 220, second rib 230, and third rib 240, as well as the first and second longitudinal supports 210a and 210b, are omitted here to more clearly show the construction of the transmission mechanisms 300a and 300b. It is understood that the backrest pivot mechanism 260 can have any suitable construction. As shown, in one embodiment, the seat 10 may include a first transmission mechanism 300a and a second transmission mechanism 300b located on both sides of the backrest frame 200, respectively. The first transmission mechanism 300a and the second transmission mechanism 300b on both sides can have similar constructions. Furthermore, taking the first rib 220 as an example, it includes a laterally penetrating rigid support 228 (its external flexible support is omitted here to more clearly show the internal construction), and a pair of synchronizers 400a and 400b located at both ends of the first rib. In one embodiment, the first transmission mechanism 300a may be disposed adjacent to the first longitudinal support 210a, and during the folding or unfolding of the seat back frame 200, the pivot mechanism 260 may drive the first transmission mechanism 300a and, through a pair of synchronizers 400a and 400b, move the first rib 220, the second rib 230 and the third rib 240 along the first and second longitudinal supports 210a and 210b.

[0048] refer to Figures 1 to 4 In one embodiment, the vehicle seat 10 may include a seat cushion frame 100 and a seat back frame 200 movable relative to the seat cushion frame 100 between a folded position and a used position via a seat back pivoting mechanism 260. The seat back frame 200 may include first and second longitudinal supports 210a and 210b. In one example, the first and second longitudinal supports 210a and 210b are generally parallel; in other examples, the first and second longitudinal supports 210a and 210b may have a relative angle. The seat 10 further includes a first rib 220, a second rib 230, and a third rib 240 laterally supported on the first and second longitudinal supports 210a and 210b. The first rib 220 is closer to the top edge 202 of the seat back 200 than the second rib 230; while the third rib 240 is further away from the top edge 202 of the seat back 200 than the second rib 230. The first rib 220, the second rib 230, and the third rib 240 are linearly movable between a used position and a stowed position along the first and second longitudinal supports 210a and 210b. In one example, the linear movement may be a straight line movement along the longitudinal supports, rather than a pivoting curve movement, and the rate of movement may depend on the setting of the chair back pivot rate. In one embodiment, the first rib 220, the second rib 230, and the third rib 240 may all include laterally extending rigid inner supports, such as, but not limited to, those provided. Figure 4The rigid shaft 228 extending through the first rib is shown, along with the covering material, such as any suitable seat support material, like polyurethane foam. The second rib 230 and the third rib 240 can have a similar structure, namely an internal rigid support and an external covering material layer.

[0049] The following is for reference. Figure 5 and combined Figures 1-4 This will allow for a clearer understanding of the construction of the transmission mechanism in one embodiment of this application. Figure 5 A partially enlarged view schematically showing a transmission mechanism 300a in one or more embodiments of this application is shown. (Reference) Figures 4 to 5 In one embodiment, the vehicle seat 10 may further include a fixed gear 280 fixedly connected to the seat back pivoting mechanism 260. In one embodiment, the fixed gear 280 may be fixedly fitted onto the pivot 204 of the seat back frame 200 and does not rotate with the pivoting of the seat back frame 200. In other examples, for instance, the fixed gear 280 may be fitted onto the pivot 204 of the seat back frame 200 and may rotate with the pivoting of the seat back frame 200. In one embodiment, the first transmission mechanism 300a includes a drive gear 310a drivably engaged with the fixed gear 280, a first pulley 320a coaxially connected to the drive gear 310a, a second pulley 330a pivotally connected to the top end 202 of the seat back frame 200 away from the first pulley 320, and a transmission belt 340a tensioned between the first pulley 320 and the second pulley 330. In one example, the drive gear 310a can be relatively small in size relative to the fixed gear 280, such that rotation of the seat back frame 200 can drive the drive gear 310a to rotate a sufficient number of revolutions around the fixed gear 280, while the first pulley 320a can drive the drive belt 340a to move a sufficient distance. It is understood that there can be fewer or more intermediate gears between the fixed gear 280 and the first pulley 320a, and those skilled in the art can design according to their needs, taking into account spatial arrangement. In one or more embodiments, the drive belt 340a can be designed as, for example, a belt or chain.

[0050] Continue to refer to Figures 4 to 5In one embodiment, the number of teeth 282 of the fixed gear 280 limits the distance the drive belt 340a moves as the seat back frame 200 rotates. In another embodiment, the number of teeth 282 of the fixed gear 280 is designed such that when the first, second, and third ribs 220, 230, and 240 have moved to a preset position on the seat back frame 200 with the first drive belt 340a, as the seat 10 is further adjusted backward, the drive wheel 310a can rotate to the smooth surface 284 of the fixed gear 280, causing the drive wheel 310a to idle and keeping the first, second, and third ribs 220, 230, and 240 at the preset position on the seat back frame 200, without further excessive movement as the seat 10 is further adjusted backward. Furthermore, the number of teeth 282 of the fixed gear 280 can be designed such that when the first, second, and third ribs 220, 230, and 240 have moved to the top 202 of the seat back frame 200 along with the first drive belt 340a, as the seat 10 is further folded, the drive wheel 310a can rotate to the smooth surface 284 of the fixed gear 280, allowing the drive wheel 310a to idle and causing the first, second, and third ribs 220, 230, and 240 to remain at the top 202 of the seat back frame 200 without further excessive movement as the seat 10 is folded. In one or more examples, the preset positions of the first, second, and third ribs 220, 230, and 240 in the seat back frame 200 can be ergonomically designed based on the average or majority of passenger dimensions.

[0051] Figure 6This diagram shows a partially enlarged view of the transverse support rib end structure and its cooperation with the transmission mechanism in one or more embodiments of this application. One embodiment of its rib end structure is explained here using the first rib 220 as an example. In one embodiment, the first rib 220 includes a first protruding shaft 222 and a first rib end gear 224a supported on the first protruding shaft 222, and a first synchronizer 400a sleeved on the first protruding shaft 222. The first synchronizer 400a selectively engages the transmission belt 340a in the above example, allowing the first rib 220 to move synchronously with the movement of the transmission belt 340a. In one embodiment, as shown, the first synchronizer 400a includes a first base 410a fixedly connected to the first rib 220, a first synchronization component 412a connected to the first base 410a, and a second synchronization component 420a movable relative to the first base 410a in direction F under the action of force. In one example, the first base 410a and the second synchronization component 420a can be connected by a biasing mechanism 450 (e.g., any suitable biasing spring, leaf spring, etc.), such that the second synchronization component 420a is always loaded (or biased) towards the first synchronization component 412a. This ensures that, under normal synchronization conditions, the first synchronization component 412a, close to the second synchronization component 420a, clamps the drive belt 340a between them, thereby moving the first rib 220. In this example, the first synchronization component 412a is a toothed first synchronization rack 412a, while the second synchronization component 420a is a gear or sector gear that can clamp the drive belt 340a with the first synchronization component 412a. It is understood that the first synchronization component 412a and the second synchronization component 420a can also be implemented in other forms, such as components with rough surfaces, or engaging structures with protrusions and recesses, etc., as long as they can clamp the drive belt 340a and move the first rib 220.

[0052] Continue to refer to Figure 6 In one embodiment, the second synchronization component 420a may include a first handle 430 extending away from the first rib 220 and along the lateral direction W of the first rib 220. In one example, under the action of an external force, the first handle 430 can move in the direction F. In other words, pushing the first handle 430 in the direction away from the first synchronization rack 412a can separate the first synchronization component 412a and the second synchronization component 420 from each other, so that the first rib 220 can move independently of the drive belt 340a.

[0053] refer to Figures 4 to 6In one embodiment, the drive belt 340a can move a lateral support rib, such as a first rib 220, along a first longitudinal support 210a. The first longitudinal support 210a may include a first rack surface 350a that meshes with a first rib end gear 224. In the example described above, in a synchronized state, a first synchronizer 400 can engage the drive belt 340a therebetween, and the first synchronizer 400a moves the first rib end gear 224a along the first rack surface 350a of the first longitudinal support 210a as the drive belt 340a moves. Although described here using an end configuration of the first rib 220 as an example, in yet another embodiment, the vehicle seat 10 may further include a second drive mechanism 300b, similar to the first drive mechanism 300a, connected to the first rib 220 and drivably connected to the seat back pivot mechanism 260. The second drive mechanism 300b is adjacent to the second longitudinal support 210b and includes the second drive belt 340b. The first rib 220 may further include a second rib-end gear 224b located at the second end and a second synchronizer 400b connected to the second end. The second longitudinal support 210b may include a second rack surface 350b that meshes with the second rib-end gear 224b. In the synchronized state, the second synchronizer 400b holds the second drive belt 340b therebetween, and as the second drive belt 340b moves, the second synchronizer 400b drives the second rib-end gear 224b to move along the second rack surface 350b of the second longitudinal support 210b. Figure 4 As shown, the lateral support ribs, such as the first rib, can have a rigid, laterally extending shaft 228. First synchronizers 400a and second synchronizers 400b are connected to both ends of the rigid shaft 228 to synchronize movement. Furthermore, the first and second rack surfaces 350a and 350b can be continuous rack surfaces, extending a suitable length along the first and second longitudinal supports 210a and 210b. In one or more embodiments, the second rib 230 and the third rib 240 can each have the same structure as the synchronizer at the end of the first rib 220. In one or more embodiments, the second rib 230 and the third rib 240 can have a different structure than the synchronizer at the end of the first rib 220.

[0054] Figure 7 This illustration shows a partially enlarged schematic of the end structure of the transverse support rib and its cooperation with the transmission mechanism in another embodiment of this application. Figure 8 This diagram shows a partially enlarged view of the longitudinal support member in another embodiment of this application. The rib end structure in another embodiment of this application is illustrated here using one end of the second rib 230 as an example. It can be understood that the other end of the second rib 230 may have a corresponding symmetrical structure, while the first rib 220 and the third rib 240 may have similar structures. Figure 7 and Figure 8As shown, in one embodiment, the second rib 230 may include a first protruding shaft 232, a first rib end gear 234a supported on the first protruding shaft 232, and a first synchronizer 500a sleeved on the first protruding shaft 232. Similarly, the first synchronizer 500a can clamp the transmission belt 340a therebetween, so that the movement of the transmission belt 340a can drive the synchronous movement of the second rib 230. In one embodiment, the first synchronizer 500a may include a first base 510a fixedly connected to the second rib 230, a first slider 520a located on the main plane of the first base 510a and slidable relative to the first base 510a, a first synchronization component 512 connected to the first base 510a, and a second synchronization component 522 disposed on the first slider 520a. It can be understood that the first base 510a and 520a can be connected via a similar... Figure 6 The biasing mechanism shown is connected such that the first slider 520a always presses the drive belt 340a against the first synchronization assembly 512. In one embodiment, the first synchronization assembly 512 includes a first synchronization gear 512a connected to the first base 510a, and the second synchronization assembly 522 includes a ratchet 522a and a pawl 524a supported on the first slider 520a. In the synchronized state, the ratchet 522a and the first synchronization gear 512a clamp the drive belt 340a. Figure 8 In another embodiment shown, the second synchronization component 522 may include a pair of longitudinally aligned ratchet wheels 522a and 522b, while correspondingly, the first synchronization component 512 may include a pair of synchronization gears 512a that engage with the pair of longitudinally aligned first synchronization gears 522a and 522b.

[0055] Continue to refer to Figure 7 and combined Figure 6 In one embodiment, Figure 7 In the illustrated embodiment, the synchronization mechanism 500 includes a synchronization mechanism with... Figure 6 The first handle 530 is similar to the one shown in 430. In one example, the first handle 530 can move along the direction F under the action of an external force. In other words, when the first handle 530 is pushed in a direction away from the first synchronization component 512, the first synchronization component 512 and the second synchronization component 522 can be separated from each other, so that the second rib 230 can move independently of the drive belt 340a.

[0056] Continue to refer to Figures 7 to 8 In one or more examples, the pawl 524a also includes a separation shaft 525a extending away from the pawl 524a and the second rib 230. In normal synchronization, the pawl 524a abuts against a tooth of the ratchet 522a, preventing the ratchet 522a from moving along... Figure 7 The counterclockwise direction shown or Figure 8The direction R indicated is the movement, that is, in the synchronized state, where the ratchet 522a and the first synchronizing gear 512a clamp the drive belt 340a and move accordingly. In another embodiment, the first longitudinal support 210a may include a plurality of protrusions connected thereto or directly protruding from its surface to separate the ribs from the drive belt. Figure 7 A first separation protrusion 710 corresponding to the first rib 220 and a second separation protrusion 720 corresponding to the second rib 230 are shown. For example, when the second rib 230 moves to the top 202 of the first longitudinal support 210a, the second separation protrusion 720 can contact the separation shaft 525a along the direction of the protrusion, thereby separating the pawl 524a and the ratchet 522a, allowing the ratchet 522a to rotate in the direction R. That is, as the second rib 230 moves to the top 202, the second separation protrusion 720 can push open the separation shaft 525a to allow the ratchet 522a to rotate. In other words, the second rib 230 will not move further to the top 202, nor will it experience excessive friction due to engaging the drive belt 340a, because once it reaches the top position, the synchronizer 500 is disengaged by the action of the second separation protrusion 720. The distances of the separation shafts of the first rib 220 and the second rib 230 relative to the first longitudinal support 210a may be different. The protruding lengths of the first separation protrusion 710 and the second separation protrusion 720 may be different. Thus, the separation axis of the first rib 220 can be pushed away from the ratchet only when passing the second protrusion 720. It is understood that although first and second separation protrusions 710, 720 are shown in this example, there can be more than two separation protrusions to correspond to different numbers of lateral support ribs. In one embodiment, the first and second separation protrusions 710, 720 are appropriately spaced, and the first rib 220, second rib 230, and third rib 240 can have at least one pair of second synchronizing gears 522a, one of which is located within the appropriate spacing between the first and second separation protrusions 710, 720 when the first rib 220, second rib 230, and third rib 240 are retracted to the top position 202. In another embodiment, the first and second separation protrusions 710, 720 can have handles (e.g., similar to) that are opposite to the backrest frame 200 and extend outward along the lateral direction W of the support rib. Figure 6 , Figure 7 (Extending direction of the middle handles 430 and 530), so that when the user opens the seat from the folding position, pushing the handle in a direction away from the first and second separation protrusions 710 and 720 can disengage the first and second separation protrusions 710 and 720 from the separation shaft 525a of the pawl 524a of the synchronizer of the first rib 220 and the second rib 230, thereby restoring the connection between the pawl 524a and the ratchet 522a, and the ratchet 522a and the first synchronizer gear 512a can engage the drive belt 340a and move with it, so that the second rib 230 can be moved to the appropriate position by the drive belt 340a.

[0057] Continue to refer to Figures 7 to 8 In one embodiment, the first longitudinal support 210A may include a first stop protrusion 810 and a second stop protrusion 820 projecting from its surface. The first stop protrusion 810 and the second stop protrusion 820 may be located on the side of the first longitudinal support 210A opposite to the separating protrusion. The first stop protrusion 810 and the second stop protrusion 820 may be made of a flexible material such as plastic. In one embodiment, wherein the first and second stop protrusions 810, 820 may have an inclined surface 812 that contacts the first rib 220 or the second rib 230 such that the first rib 220, the second rib 230 (and the third rib 240 or more / fewer support ribs) can easily pass along the inclined surface 812 as it moves toward the top 202 of the seat back frame, the first and second stop protrusions 810, 820 also have a stop surface 814 that is substantially parallel to the bottom surface of the first rib 220, the second rib 230 to engage and / or support the first and second ribs in the use position. The second rib 230 may include a groove 830 corresponding to the first stop protrusion 810 such that, during downward movement from the top 202 (or movement away from the top 202), the second rib 230 can be engaged with the second stop protrusion 820 via the first stop protrusion 810. The length of the stop surface 824 of the second stop protrusion 820 in the protrusion direction may be greater than the length of the groove 830 in the protrusion direction to engage and / or support the second rib 230. The first rib 220 may be directly engaged with the first stop protrusion 810. Although first and second stop protrusions 810 and 820 are shown in this example, there may be more than two stop protrusions to provide a correspondingly different number of lateral support ribs.

[0058] In one or more embodiments, the seat back frame 200 includes the first rib 220, the second rib 230, and the third rib 240 described above, wherein the first rib 220 and the second rib 230 include as follows: Figures 7 to 8 The end configuration shown, while the third rib 240, which is relatively closer to the seat frame 100, includes... Figure 6 The end structure is shown. In the retracted position, the first rib 220, the second rib 230, and the third rib 240 are substantially in contact with and close to the top end 202 of the seat back; in the use position, the first rib 220, the second rib 230, and the third rib 240 are spaced at a predetermined distance to form a rigid support for the seat back 200.

[0059] refer to Figures 1 to 8When the seat 10 is switched from the use position to the folding position, the seat pivot mechanism 260 can drive the seat back frame 200 and the drive wheel 310a to rotate around the fixed gear 280. The drive wheel 310a further drives the first pulley 320a to rotate, so that the transmission belt 340a moves with the first pulley 310a and further drives the first rib 220, the second rib 230 and the third rib 240 to move towards the top 202 of the seat back frame 200 of the seat 10. Once it reaches the top position, the first rib 220, the second rib 230 and the third rib 240 can be separated from the transmission belt 340a as described above. The first rib 220, the second rib 230 and the third rib 240 are arranged sequentially at the top position, and the third rib 240 can be locked on the first stop protrusion 810, thereby maintaining it at the top position 202. When the seat 10 is switched from the folded position to the use position (open position), the seat pivot mechanism 260 can drive the backrest frame 200 to rotate, which can further drive the drive wheel 310a to rotate around the fixed gear 280. The drive wheel 310a further drives the first pulley 320a to rotate, so the transmission belt 340a moves with the first pulley 310a and further drives the first rib 220, the second rib 230 and the third rib 240 to move downward from the top 202 of the seat backrest frame 200 of the seat 10 (or move in the direction away from the top 202 of the seat). The second rib 230 and the third rib 240 can pass through the first stop protrusion 810, and the second rib 230 can stop at the second stop protrusion 820, and the first rib 220 can stop at the first stop protrusion 810. When the first rib 220, the second rib 230, and the third rib 240 move to their predetermined positions (e.g., the positions of the corresponding stop protrusions 810 / 820), if the user wishes to adjust the support ribs of the seat 10, they can do so by adjusting the protruding handle (e.g., Figures 6 to 8 The synchronizer is separated to enable manual adjustment of the support ribs. In other embodiments, the stop surface, such as 814 / 824, may have an inclined surface opposite to the inclined surface 812 and in the opposite direction of inclination, so that the first rib 220, the second rib 230, and the third rib 240 can pass more easily through the stop surface 814 / 824 during the opening of the seat 10. In other words, the inclined stop surface can provide support / stop but with suitable, surmountable resistance. It is understood that the inclination angles of the inclined surface 812 and the stop surface 814 can be designed according to requirements.

[0060] One or more embodiments of this application provide a seat and an adjustment mechanism. The design of multiple slidable lateral support ribs in the backrest frame allows the lateral support ribs to be relatively concentrated after the seat is folded, resulting in a smaller footprint when folded. In one or more embodiments of this application, the support ribs of the frame can be automatically retracted as the seat is folded and unfolded as the seat is opened, making operation more convenient. Furthermore, the lateral support ribs allow for independent adjustment by the user, thereby meeting the different back support needs of various users. Those skilled in the art can make various changes, modifications, and variations to these specific embodiments without departing from the spirit and scope defined by the claims of this application.

[0061] The claims specifically point to particular combinations and sub-combinations that are considered novel and non-obvious. These claims may relate to a "one" element or a "first" element or a similar feature. Such claims should be understood to include one or more such elements, neither requiring nor excluding two or more such elements. Other combinations and sub-combinations of the described features, functions, elements, and / or characteristics may be claimed by amendment to the present claims or by filing in this application or related applications. Such claims, whether broader, narrower, equivalent, or different from the original claims, should be considered to be included in the subject matter of this application.

Claims

1. A vehicle seat, comprising a seat cushion frame and a seat back frame movable between a folded position and a used position, the seat back frame including first and second longitudinal supports, and a first rib and a second rib laterally supported on the first and second longitudinal supports, wherein the first rib and the second rib are movable along the first and second longitudinal supports to change the distance between the first rib and the second rib, wherein the vehicle seat includes a seat back pivot mechanism and a first transmission mechanism connected to and drivably connected to the seat back pivot mechanism and the first transmission mechanism is disposed adjacent to the first longitudinal support, and during seat back folding or unfolding, the seat back pivot mechanism drives the first transmission mechanism and causes the first rib and the second rib to move along the first and second longitudinal supports.

2. The vehicle seat of claim 1, further comprising a covering over the first and second ribs, wherein the first and second ribs are substantially perpendicular to the first and second longitudinal supports, and the sides of the first and second ribs closest to the user have different shapes.

3. The vehicle seat as claimed in claim 1, wherein in the folded position, the first rib and the second rib are movable to the top position of the seat back frame, and when the seat back frame is folded onto the seat cushion frame, the first rib and the second rib are generally located outside the projection of the seat cushion frame onto the seat back frame to reduce the space occupied by the vehicle seat in the folded position.

4. The vehicle seat as claimed in claim 3, further comprising a fixed gear fixedly connected to the seat back pivoting mechanism, the first transmission mechanism comprising a drive gear drivably engaged with the fixed gear, a first pulley coaxially connected to the drive gear, a second pulley pivotally connected to the top of the frame of the seat back away from the first pulley, and a first transmission belt tensioned between the first pulley and the second pulley.

5. The vehicle seat of claim 4, wherein the first rib is closer to the top of the seat back frame than the second rib, wherein the first rib includes a first rib end gear located at a first end and a first synchronizer connected to the first rib, wherein the first longitudinal support includes a first rack surface that meshes with the first rib end gear, wherein in a synchronized state the first synchronizer engages the first drive belt therebetween, and the first synchronizer can drive the first rib end gear to move along the first rack surface of the first longitudinal support as the first drive belt moves.

6. The vehicle seat of claim 5, wherein the first rib includes a first protruding shaft supporting the gear at the end of the first rib, the first synchronizer is sleeved on the first protruding shaft, wherein the first synchronizer includes a first base fixedly connected to the first rib, a first synchronization component connected to the first base, and a second synchronization component movable relative to the first base under the action of force, wherein in a synchronized state, the first synchronization component approaches the second synchronization component to clamp the first transmission belt therebetween.

7. The vehicle seat of claim 6, wherein the first synchronization component is a first synchronization rack, the second synchronization component is a second toothed component, and the second synchronization component includes a first handle extending away from the first rib and along the lateral direction of the first rib, and pushing the first handle in the direction away from the first synchronization rack can separate the first synchronization component and the second synchronization component.

8. The vehicle seat of claim 7, wherein the second synchronization assembly includes a first slider slidable relative to the first base on the main plane of the first base, the second toothed member being formed on the first slider, and the first base including a biasing device that is always relatively biased such that the first slider is directed toward the first synchronization assembly to press the first drive belt.

9. The vehicle seat of claim 5, wherein the first rib includes a first protruding shaft supporting a gear at the end of the first rib, the first synchronizer is sleeved on the first protruding shaft, wherein the first synchronizer includes a first base fixedly connected to the first rib, a first slider located on the main plane of the first base and slidable relative to the first base, a first synchronization component connected to the first base, and a second synchronization component disposed on the first slider, wherein the first synchronization component includes a first synchronization gear connected to the first base, wherein the second synchronization component includes a ratchet and a pawl supported on the first slider, wherein in the synchronized state the ratchet and the first synchronization gear clamp the first drive belt.

10. The vehicle seat as claimed in any one of claims 5-9, wherein the second rib has the same construction as the end structure of the first rib.

11. The vehicle seat of claim 5, further comprising a second transmission mechanism connected to the first rib and the second rib and drivably connected to the seat back pivot mechanism, the second transmission mechanism being adjacent to the second longitudinal support and including a second transmission belt, wherein the first rib further includes a second rib end gear located at a second end and a second synchronizer connected to the second end, wherein the second longitudinal support includes a second rack surface capable of meshing with the second rib end gear, wherein in a synchronized state the second synchronizer engages the second transmission belt therebetween, and the second synchronizer drives the second rib end gear to move along the second rack surface of the second longitudinal support as the second transmission belt moves.

12. The vehicle seat of claim 11, wherein the second rib includes a third rib end gear located at a first end and a third synchronizer connected to the second rib, wherein the third rib end gear can mesh with the first rack surface of the first longitudinal support, and in a synchronized state the third synchronizer holds the first drive belt therebetween, the third synchronizer driving the third rib end gear to move along the first rack surface of the first longitudinal support as the first drive belt moves.

13. The vehicle seat of claim 5, wherein the first longitudinal support member includes a first stop protrusion and a second stop protrusion protruding from a first surface, the first rib being lockable to the first stop protrusion, the second rib including a groove corresponding to the first stop protrusion such that the second rib can be locked to the second stop protrusion through the first stop protrusion, wherein when the seat is switched from the folded position to the used position, the backrest pivoting mechanism drives the seat back frame to rotate, thereby driving the drive gear to rotate around the fixed gear and driving the first pulley to rotate, the first transmission belt moving with the first pulley and further driving the first rib and the second rib to move, the second rib passing through the first stop protrusion and stopping at the second stop protrusion.

14. The vehicle seat of claim 13, wherein the first and second stop protrusions have a stop surface and an inclined surface that contact the first rib or the second rib.

15. The vehicle seat of claim 9, wherein the first longitudinal support includes a first separation protrusion and a second separation protrusion protruding from a second surface opposite to a first surface, wherein when the first rib and the second rib move to the top of the first longitudinal support, the first and second separation protrusions can separate the first synchronizer such that the first rib and the second rib are movable relative to the first drive belt.

16. The vehicle seat of claim 1, wherein the first rib and the second rib include laterally extending rigid inner supports and coverings.

17. The vehicle seat of claim 4, wherein the number of teeth of the fixed gear limits the distance the first transmission belt moves as the seat back frame rotates; when the first and second ribs have moved to the top of the seat back frame with the first transmission belt, the drive gear rotates to the smooth surface of the fixed gear, causing the drive gear to idle while the first and second ribs remain at the top of the seat back frame; when the first and second ribs have moved to a preset position of the seat back frame with the first transmission belt, the drive gear rotates to the smooth surface of the fixed gear, causing the drive gear to idle while the first and second ribs remain at the preset position of the seat back frame.

18. A vehicle seat, comprising Seat cushion frame, and The seat back frame moves relative to the seat cushion frame between a folded position and a used position via a seat back pivot mechanism. The seat back frame includes first and second longitudinal supports, and first and second ribs that are laterally supported on the first and second longitudinal supports; and A drive belt is connected to the first rib and the second rib and is drivably connected to the backrest pivoting mechanism, which drives the drive belt and causes the first rib and the second rib to move along the first and second longitudinal supports.

19. The vehicle seat of claim 18, wherein the vehicle seat further comprises A pair of fixed gears located on both sides of the seat are fixedly connected to the backrest pivoting mechanism. A pair of driving gears that are drivably engaged with the pair of fixed gears. A pair of first pulleys coaxially connected to the pair of driving gears, A pair of second pulleys located at the top of the seat back frame, away from the pair of first pulleys, the drive belt comprising a first drive belt and a second drive belt tensioned between the first pulleys and the second pulleys, wherein, The first transmission belt is adjacent to the first longitudinal support member, and the second transmission belt is adjacent to the second longitudinal support member. The first rib includes a first rib end gear and a second rib end gear located at its ends, as well as a corresponding first synchronizer that engages the first transmission belt therebetween and a corresponding second synchronizer that engages the second transmission belt therebetween. The second rib includes a third rib end gear, a fourth rib end gear located at its end, a corresponding third synchronizer that engages the first drive belt therebetween, and a corresponding fourth synchronizer that engages the second drive belt therebetween. The first longitudinal support member includes a first longitudinal rack surface that can mesh with the corresponding first and third rib end gears, and the second longitudinal support member includes a second longitudinal rack surface that can mesh with the corresponding second and fourth rib end gears. As the first transmission belt moves, the first synchronizer and the third synchronizer drive the first rib end gear of the first rib and the third rib end gear of the second rib to move along the first longitudinal rack surface of the first longitudinal support member, respectively; as the second transmission belt moves, the second synchronizer and the fourth synchronizer drive the second rib end gear of the first rib and the fourth rib end gear of the second rib to move along the second longitudinal rack surface of the second longitudinal support member.

20. The vehicle seat of claim 19, wherein the first rib includes a first protruding shaft supporting a gear at the end of the first rib, wherein a first synchronizer is sleeved on the first protruding shaft, the first synchronizer including a first base fixedly connected to the first rib, a first synchronizer assembly located on the first base, and a second synchronizer assembly connected to the first base; wherein the second rib includes a second protruding shaft supporting a gear at the end of the third rib, the third synchronizer being sleeved on the second protruding shaft, wherein the third synchronizer includes a second base fixedly connected to the second rib, a third synchronizer assembly located on the second base, and a fourth synchronizer assembly retractably connected to the second base, wherein in a synchronized state, the first synchronizer assembly cooperates with the third synchronizer assembly, and the second synchronizer assembly cooperates with the fourth synchronizer assembly to clamp the first drive belt therebetween such that the first rib and the second rib can move with the first drive belt.

21. The vehicle seat of claim 20, wherein the first base includes a first slider slidably connected thereto, and a biasing device always offset such that the first slider presses against the first synchronizing assembly, wherein the first synchronizing assembly is a first synchronizing gear, the second synchronizing assembly includes a ratchet and a pawl supported on the second slider, the third synchronizing assembly is a third synchronizing rack, and the fourth synchronizing assembly is a fourth toothed component, and the first and second synchronizing assemblies include a first handle extending laterally away from the first rib and along the lateral direction of the first rib, the third and fourth synchronizing assemblies include a second handle extending laterally away from the second rib and along the lateral direction of the second rib, compressing the first handle disengages the first synchronizing assembly from the second synchronizing assembly, and compressing the second handle disengages the third synchronizing assembly from the fourth synchronizing assembly.

22. A vehicle seat, comprising Seat cushion frame, and The seat back frame moves relative to the seat cushion frame between a folded position and a used position via a seat back pivot mechanism. The backrest frame includes first and second longitudinal supports, and first, second and third ribs that are laterally supported on the first and second longitudinal supports, wherein the first rib is closer to the top of the seat back than the second rib; and the third rib is further away from the top of the seat back than the second rib. The first rib, the second rib, and the third rib can move linearly along the first and second longitudinal supports between the use position and the folded position. In the folded position, the first rib, the second rib, and the third rib are in substantially contact with and close to the top of the seat back. In the use position, the first rib, the second rib, and the third rib are spaced at a predetermined distance and together form a rigid support for the seat back.

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