Folding linkage mechanism of vehicle seat and vehicle

Abstract

The invention relates to the technical field of vehicle parts, in particular to a turnover linkage mechanism of a vehicle seat and a vehicle, the turnover linkage mechanism of the vehicle seat structurally comprises a foot margin support, the foot margin support is provided with a fixing block, and a guide groove is formed in the fixing block; the backrest framework is pivotally mounted on the foot margin bracket; the movable block is movably installed on the backrest framework, the movable block rotates along with the backrest framework, the movable block is provided with a guide column, and the guide column is clamped in the guide groove; the headrest is pivotally mounted on the backrest framework, and a driving component is mounted on the headrest; and the locking assembly is installed on the headrest, the locking assembly is provided with a pull wire, the lower end of the pull wire is connected to the movable block, and after the lower end of the pull wire is pulled by a preset distance, the locking assembly is unlocked, so that the headrest can be folded forwards. The turnover linkage mechanism of the vehicle seat and the vehicle can solve the problem of how to avoid interference between the rear-row seat and the front-row seat in the turnover process.

Description

Technical Field

[0001] This application relates to the field of vehicle component technology, and in particular to a folding linkage mechanism for a vehicle seat and a vehicle. Background Technology

[0002] As one of the core components of automotive interiors, the design quality of vehicle seats directly impacts the driving and riding experience. With consumers' increasing demands for automotive comfort, functionality, and space utilization, their requirements for seat comfort are also becoming more stringent, prompting a diversification of seat interaction modes.

[0003] Currently, vehicle seat design has significant limitations. When the rear seats fold forward, the headrests interfere with the backrests of the front seats, preventing the rear seats from folding down completely and severely impacting the user experience. Therefore, there is an urgent need for a linkage mechanism that allows the headrests and backrests of vehicle seats to fold together, thus avoiding interference between the rear seats and the front seats during the folding process. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a folding linkage mechanism for vehicle seats and a vehicle, so as to solve the problem of how to avoid interference between the rear seats and the front seats during the folding process.

[0005] According to a first aspect of the present invention, a folding linkage mechanism for a vehicle seat is provided, wherein the folding linkage mechanism for the vehicle seat includes: a base bracket with a fixing block forming a guide groove; a backrest frame pivotally mounted on the base bracket; a movable block movably mounted on the backrest frame, the movable block rotating with the backrest frame, the movable block having a guide post engaged in the guide groove; a headrest pivotally mounted on the backrest frame, the headrest having a driving component and a tendency to fold forward under the action of the driving component; and a locking component mounted on the headrest, wherein when the locking component is locked, the headrest cannot fold forward, the locking component having a pull cable with the lower end of the pull cable connected to the movable block, and the locking component unlocking after the lower end of the pull cable is pulled a preset distance, allowing the headrest to fold forward; during the forward folding of the backrest frame, the guide post slides from a first end to a second end of the guide groove, and drives the movable block to pull the lower end of the pull cable a preset distance.

[0006] Preferably, the guide groove is formed in a V shape, with the first and second ends of the guide groove being higher than the inflection point in the middle of the guide groove. During the process of the guide post moving to the inflection point, the lower end of the pull line is pulled a preset distance.

[0007] Preferably, the backrest frame is provided with a plurality of stepped bolts, and the movable block is provided with a plurality of strip grooves. The stepped bolts pass through the strip grooves and can move within the strip grooves. During the process of the guide column moving from the first end of the guide groove to the inflection point, the stepped bolts move from the bottom end of the strip groove to the top end of the strip groove.

[0008] Preferably, the foot support includes a first leg and a second leg arranged opposite to each other, a pivot is provided between the first leg and the second leg, the backrest frame is pivotally mounted on the pivot, and a clearance hole is provided in the middle of the movable block, through which the pivot passes.

[0009] Preferably, the locking component includes: a fixed component installed on the backrest frame; and a movable component installed on the headrest, wherein the movable component can engage with the fixed component to prevent the headrest from folding forward, the upper end of the pull cord is connected to the movable component, and the movable component separates from the fixed component when the lower end of the pull cord is pulled a preset distance.

[0010] Preferably, the fixing component includes: two insert rods spaced apart from each other, the lower end of the insert rods fixed to the backrest frame, the upper end of the insert rods inserted into the headrest, and the pull cable passing through one of the insert rods; a crossbeam disposed within the headrest, the two ends of the crossbeam being respectively connected to the top ends of the two insert rods; and a locking tooth disposed in the middle of the crossbeam, the locking tooth being able to engage with the movable component, preventing the headrest from folding forward.

[0011] Preferably, the movable component includes: an unlocking pivot, disposed within the headrest; an unlocking tooth, pivotally mounted on the unlocking pivot, the unlocking tooth capable of engaging with the locking tooth; an unlocking pull block, movably disposed within the headrest, the unlocking pull block connected to the top end of the pull cord, the unlocking pull block pivotally connected to the locking tooth, wherein when the pull cord pulls the unlocking pull block, the unlocking pull block drives the unlocking tooth to separate from the locking tooth; a U-shaped guide, disposed within the headrest, the U-shaped guide opening downwards, the pull cord passing through a first end of the U-shaped guide to a second end of the U-shaped guide, the unlocking pull block disposed below the U-shaped guide; and a first spring, one end of the first spring abutting against the second end of the U-shaped guide, the other end of the first spring abutting against the top of the unlocking pull block, the pull cord passing through the first spring.

[0012] Preferably, the headrest includes a front cover and a rear cover that interlock with each other, the driving component and the movable component are sandwiched between the front cover and the rear cover, a rib is provided between the front cover and the rear cover, the unlocking pull block moves in the slide formed by the rib, the driving component is a torsion spring, one end of the driving component is connected to the fixed component, and the other end of the driving component is connected to the headrest. When the headrest is not folded into place, the driving component continuously applies an elastic force to the headrest to fold it forward.

[0013] Preferably, the pull cable includes an upper pull cable and a lower pull cable. The upper end of the upper pull cable is connected to the movable component, and the lower end of the lower pull cable is connected to the movable block. The folding linkage mechanism of the vehicle seat also includes a cable connector. The cable connector has a cavity inside. The lower end of the upper pull cable and the upper end of the lower pull cable are engaged in the cavity. The lower end of the upper pull cable and the upper end of the lower pull cable can move within the cavity. A second spring is also provided in the cavity. The top end of the second spring abuts against the upper end of the lower pull cable, and the bottom end of the second spring abuts against the bottom of the cavity.

[0014] According to a second aspect of the invention, a vehicle is provided, wherein the vehicle includes a folding linkage mechanism for a vehicle seat as described above.

[0015] The vehicle seat folding linkage mechanism and vehicle of this invention embodiment include a base bracket with a fixing block forming a guide groove. A backrest frame is pivotally mounted on the base bracket. A movable block is movably mounted on the backrest frame and rotates with the backrest frame. The movable block has a guide post that engages with the guide groove. A headrest is pivotally mounted on the backrest frame. The headrest has a driving component that causes it to fold forward under the action of the driving component. A locking component is mounted on the headrest; when locked, the headrest cannot fold forward. The locking component also has a pull cable, the lower end of which is connected to the movable block. After the lower end of the pull cable is pulled a preset distance, the locking component unlocks, allowing the headrest to fold forward. In use, during the forward folding of the backrest frame, the guide post slides from the first end to the second end of the guide groove, causing the movable block to pull the lower end of the pull cable a preset distance, allowing the headrest to fold forward under the drive of the driving component, thus ensuring that the headrest does not interfere with the backrest of the front seat. This effectively solves the problem of how to prevent the rear seats from interfering with the front seats during the folding process.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the folding linkage mechanism of the vehicle seat according to the present invention.

[0019] Figure 2 This is a schematic diagram of the folding process of a vehicle seat according to the present invention.

[0020] Figure 3 This is a schematic diagram of the vehicle seat folding into place according to the present invention.

[0021] Figure 4 This is a partial structural schematic diagram of the folding linkage mechanism of the vehicle seat according to the present invention.

[0022] Figure 5 This is a schematic diagram of a portion of the structure of the folding linkage mechanism of the vehicle seat according to the present invention from another angle.

[0023] Figure 6 This is an exploded view of the headrest of the folding linkage mechanism of the vehicle seat according to the present invention.

[0024] Figure 7 This is a schematic diagram of the locking component of the folding linkage mechanism of the vehicle seat according to the present invention.

[0025] Figure 8 This is a schematic diagram of the internal structure of the headrest of the folding linkage mechanism of the vehicle seat according to the present invention.

[0026] Reference numerals: 1-Foot bracket; 10-Fixing block; 100-Guide groove; 11-First support leg; 12-Second support leg; 13-Pivot; 2-Backrest frame; 21-Step bolt; 3-Moving block; 30-Guide column; 31-Strip groove; 32-Allowing hole; 4-Headrest; 41-Front cover; 42-Rear cover; 43-Rib plate; 5-Pull cable; 51-Upper pull cable; 52-Lower pull cable; 53-Cable connector; 6-Fixing component; 61-Insertion rod; 610-Insertion rod slot; 62-Crossbeam; 63-Locking tooth; 64-Seat guide sleeve; 7-Moving component; 71-Unlocking pivot; 72-Unlocking tooth; 73-Unlocking pull block; 74-U-shaped guide; 75-First spring; 8-Drive component; 91-First position; 92-Second position. Detailed Implementation

[0027] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0028] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0029] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0030] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0031] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0032] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0033] The terminology used herein is for the purpose of describing various examples only and is not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0034] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0035] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0036] like Figures 1 to 8 As shown, according to a first aspect of the present invention, a folding linkage mechanism for a vehicle seat is provided, the folding linkage mechanism for the vehicle seat includes a base bracket 1, a backrest frame 2, a movable block 3, a headrest 4, and a locking component.

[0037] In the following description, reference will be made to Figures 1 to 8 The specific structure of the aforementioned components of the vehicle seat folding linkage mechanism and the connection relationship of the aforementioned components are described in detail.

[0038] like Figures 1 to 8As shown, in this embodiment, the foot support 1 may be provided with a fixing block 10, which forms a guide groove 100. The backrest frame 2 is pivotally mounted on the foot support 1. The movable block 3 is movably mounted on the backrest frame 2. When the backrest frame 2 rotates, the movable block 3 can rotate with the backrest frame 2. The movable block 3 is provided with a guide post 30, which is engaged in the guide groove 100, so that during the seat folding process, the guide post 30 can move along the extension trajectory of the guide groove 100. The headrest 4 is pivotally mounted on the backrest frame 2, and the headrest 4 is provided with a drive component 8. Under the action of the drive component 8, the headrest 4 has a tendency to fold forward (towards the front of the vehicle). The headrest 4 is also provided with a locking component. When the locking component is locked, the headrest 4 cannot fold forward. The locking component is provided with a pull cable 5, the lower end of which is connected to the movable block 3. After the lower end of the pull cable 5 is pulled a preset distance, the locking component unlocks, allowing the headrest 4 to fold forward. In use, as the backrest frame 2 folds forward, the guide column 30 slides from the first end to the second end of the guide groove 100, and drives the movable block 3 to pull the lower end of the pull cable 5 a preset distance, so that the headrest 4 can fold forward under the drive of the drive component 8, thereby ensuring that the headrest 4 will not interfere with the backrest of the front seat.

[0039] Preferred, such as Figures 1 to 3 As shown, in this embodiment, the foot bracket 1 can be fixed to the vehicle floor with bolts. The foot bracket 1 may include a first leg 11 and a second leg 12 arranged opposite each other. A pivot 13 may be provided between the first leg 11 and the second leg 12, and the backrest frame 2 is pivotally mounted on the pivot 13, so that the backrest frame 2 can pivot relative to the foot bracket 1. A clearance hole 32 may be provided in the middle of the movable block 3, and the diameter of the clearance hole 32 is larger than the diameter of the pivot 13. The pivot 13 passes through the clearance hole 32, thereby preventing the movable block 3 from interfering with the pivot 13 during movement.

[0040] Preferred, such as Figures 1 to 5As shown, in this embodiment, the fixing block 10 can be bolted to the side of the second support leg 12 near the backrest frame 2. The guide groove 100 can be formed on the side of the fixing block 10 near the backrest frame 2, and the guide post 30 of the movable block 3 is inserted into the guide groove 100. Preferably, the guide groove 100 can be formed in a V shape (i.e., the extension trajectory of the guide groove 100 can be approximately V-shaped). The first end and the second end of the guide groove 100 are higher than the inflection point of the middle part of the guide groove 100 (i.e., the turning point of the V-shape). During the forward folding process of the backrest frame 2, the guide post 30 moves from the first end of the guide groove 100 to the inflection point, and then moves from the inflection point to the second end of the guide groove 100. During the movement of the guide post 30 to the inflection point, the lower end of the pull cable 5 is pulled down a preset distance, causing the locking component to unlock, and the headrest 4 folds forward at a preset angle under the drive of the drive component 8.

[0041] Furthermore, preferably, such as Figure 1 , Figure 4 and Figure 5 As shown, in this embodiment, a plurality of stepped bolts 21 can be provided on the side of the backrest frame 2 near the second support leg 12, and the stepped bolts 21 are threadedly connected to the backrest frame 2. The movable block 3 can be formed as a plate structure and can be provided on the side of the backrest frame 2 near the second support leg 12. The movable block 3 has a plurality of strip grooves 31, preferably three, which are spaced apart from each other. The positions of the stepped bolts 21 correspond to the positions of the strip grooves 31, and the multiple stepped bolts 21 are inserted one-to-one into the multiple strip grooves 31. The diameter of the stepped bolt 21 is smaller than the width of the strip groove 31, so that the stepped bolt 21 can move within the strip groove 31 (i.e., generate relative movement, and the actual moving part is the movable block 3). The end of the stepped bolt 21 can be formed with a stepped portion with a diameter greater than the width of the strip groove 31 to limit the movable block 3, thereby preventing the movable block 3 from separating from the backrest frame 2. Figure 2 As shown, when the backrest frame 2 folds from the first position 91 to the second position 92, the guide post 30 moves from the first end of the guide groove 100 to the inflection point position (i.e., the movable block 3 moves downward as a whole). During this process, the movable block 3 rotates synchronously with the backrest frame 2 under the drive of the step bolt 21, and the step bolt 21 moves from the bottom end of the strip groove 31 to the top end of the strip groove 31. The movable block 3 pulls the lower end of the pull cable 5 downward by a preset distance, thereby unlocking the locking component.

[0042] Preferred, such as Figure 1 and Figures 6 to 8As shown, in this embodiment, the locking component may include a fixed component 6 and a movable component 7. The fixed component 6 is connected to the backrest frame 2, and does not fold along with the headrest 4 during folding. The movable component 7 is installed on the headrest 4, and folds synchronously with the headrest 4 during folding. The movable component 7 can engage with the fixed component 6. When the movable component 7 and fixed component 6 are engaged, the headrest 4 is fixed to the backrest frame 2 and therefore cannot fold forward relative to the backrest frame 2. The upper end of the pull cord 5 is connected to the movable component 7. When the lower end of the pull cord 5 is pulled downwards a preset distance, the pull cord 5 pulls the movable component 7, causing the movable component 7 to separate from the fixed component 6, thereby allowing the headrest 4 to fold forward under the drive of the drive component 8.

[0043] Furthermore, preferably, such as Figures 6 to 8 As shown, in this embodiment, the fixing component 6 may include a plug rod 61, a crossbeam 62, and a locking tooth 63. There may be two plug rods 61, spaced apart from each other in the width direction of the seat. The lower end of each plug rod 61 is fixed to the backrest frame 2. Specifically, a plug rod slot 610 may be provided at the lower end of the plug rod 61, and a seat guide sleeve 64 may be provided at the top of the backrest frame 2, into which the plug rod 61 is inserted. A locking pin may be provided within the seat guide sleeve 64 to engage with the plug rod slot 610, thereby fixing the plug rod 61 to the backrest frame 2. The upper end of the plug rod 61 may be inserted into the headrest 4. The headrest 4 includes an outer shell, into which the top end of the plug rod 61 can be inserted. A clearance groove is provided at the bottom of the outer shell to prevent interference between the outer shell and the plug rod 61 before the headrest 4 is folded into place. The top end of the pull cord 5 passes through one of the insert rods 61 (i.e., from the bottom end of the insert rod 61 to the top end of the insert rod 61), thus extending into the interior of the headrest 4. A crossbeam 62 can be disposed inside the headrest 4, which is pivotable relative to the crossbeam 62. The two ends of the crossbeam 62 are welded to the top ends of the two insert rods 61, thereby fixing the crossbeam 62 to the backrest frame 2. A locking tooth 63 is welded and fixed to the middle of the crossbeam 62. The locking tooth 63 can engage with the movable component 7, allowing the headrest 4 and the movable component 7 to be fixed to the crossbeam 62, thereby preventing the headrest 4 from folding forward.

[0044] Further optimized, such as Figures 6 to 8As shown, in this embodiment, the movable component 7 may include an unlocking pivot 71, an unlocking tooth 72, an unlocking pull block 73, a U-shaped guide 74, and a first spring 75. The unlocking pivot 71 is disposed within the headrest 4 and is fixedly connected to the outer shell of the headrest 4. The unlocking tooth 72 is pivotally mounted on the unlocking pivot and is positioned above the locking tooth 63. The unlocking tooth 72 can engage with the locking tooth 63 (i.e., the unlocking tooth 72 and the locking tooth 63 form mutually meshing teeth, preventing the unlocking tooth 72 from rotating forward relative to the locking tooth 63 when engaged). The unlocking pull block 73 may be positioned above the unlocking tooth 72 and is movably disposed within the headrest 4. The unlocking pull block 73 can move up and down relative to the locking tooth 63, and the unlocking pull block 73 is pivotally connected to the locking tooth 63, so that when the unlocking pull block 73 moves upward, it can rotate the locking tooth 63, thereby disengaging the unlocking tooth 72 from the locking tooth 63 (i.e., separating them). The unlocking pull block 73 can be connected to the top end of the pull cable 5, so that the pull cable 5 can drive the unlocking pull block 73 to move. When the pull cable 5 pulls the unlocking pull block 73, the unlocking pull block 73 drives the unlocking tooth 72 to separate from the locking tooth 63.

[0045] Preferably, in this embodiment, the U-shaped guide 74 can be engaged within the outer shell of the headrest 4, with the opening of the U-shaped guide 74 facing downwards. The top end of the pull cord 5 passes through the first end of the U-shaped guide 74 to the second end of the U-shaped guide 74, thereby changing the direction of the pull cord 5 and guiding its movement. The unlocking pull block 73 can be positioned below the second end of the U-shaped guide 74, allowing the pull cord 5 to apply an upward pulling force to the unlocking pull block 73. The first spring 75 can be positioned between the second end of the U-shaped guide 74 and the unlocking pull block 73. The top end of the first spring 75 can abut against the second end of the U-shaped guide 74, and the bottom end of the first spring 75 can abut against the top of the unlocking pull block 73. The pull cord 5 passes through the first spring 75. This arrangement ensures that after the pull cord 5 pulls the unlocking pull block 73, causing the headrest 4 to fold, the unlocking pull block 73 can return to its original position under the elastic force of the first spring 75, thereby causing the unlocking teeth 72 to pivot. When the user straightens the headrest 4, the unlocking tooth 72 can re-engage with the locking tooth 63, allowing the locking component to function again.

[0046] In addition, preferred, such as Figure 2As shown, in this embodiment, when the backrest frame 2 is folded from the first position 91 to the second position 92, the backrest frame 2 can rotate 35° to 40° around the pivot 13 (not limited to this, the pivot angle can be adjusted according to actual needs). When the headrest 4 is pivoted into position, the headrest 4 can pivot 65° to 75° around the crossbeam 62 (not limited to this, the pivot angle can be adjusted according to actual needs). This arrangement ensures that the headrest 4 will not interfere with the front seat during the folding process.

[0047] Preferred, such as Figure 6 and Figure 8 As shown, in this embodiment, the outer shell of the headrest 4 may include a front cover 41 and a rear cover 42 that interlock. The driving component 8 and the movable component 7 are sandwiched between the front cover 41 and the rear cover 42. The front cover 41 and the rear cover 42 can be connected by screws, and a rib 43 may be provided between the front cover 41 and the rear cover 42. The unlocking pull block 73 can move in the slide formed by the rib 43 to guide the movement of the unlocking pull block 73. The unlocking pivot 71 and the U-shaped guide 74 can be locked onto the rib 43 to achieve fixation.

[0048] Further optimized, such as Figure 6 and Figure 8 As shown, in this embodiment, the driving component 8 can specifically be a torsion spring. One end of the driving component 8 can be wound around the crossbeam 62 of the fixing component 6, and the other end of the driving component 8 can be engaged with the rib plate 43 of the headrest 4. This arrangement allows the driving component 8 to continuously apply an elastic force to the headrest 4 to fold it forward when the headrest 4 is not fully folded, ensuring that the headrest 4 can immediately fold forward when the locking component is unlocked.

[0049] Preferred, such as Figures 1 to 8As shown, in this embodiment, the pull cable 5 may further include an upper pull cable 51 and a lower pull cable 52. The upper end of the upper pull cable 51 engages with the movable component 7 (i.e., is connected to the unlocking pull block 73). The lower end of the lower pull cable 52 can engage with the movable block 3. The folding linkage mechanism of the vehicle seat may further include a cable connector 53. A cavity may be formed inside the cable connector 53, and the lower end of the upper pull cable 51 and the upper end of the lower pull cable 52 can be engaged within this cavity. Specifically, end plates may be provided at the lower end of the upper pull cable 51 and the upper end of the lower pull cable 52, and the diameter of the end plates may be larger than the diameter of the cavity outlet, thereby ensuring that the lower end of the upper pull cable 51 and the upper end of the lower pull cable 52 will not detach from the cable connector 53. The lower end of the upper pull cable 51 and the upper end of the lower pull cable 52 can move within the cavity along the length of the cable connector 53. A second spring may also be provided within the cavity. The top end of the second spring can abut against the end plate located at the upper end of the lower pull cable 52, and the bottom end of the second spring can abut against the bottom of the cavity, thereby continuously providing upward tension to the lower pull cable 52. When the guide post 30 of the movable block 3 passes the inflection point of the guide groove 100, the movable block 3 will be pulled upward under the action of the second spring, causing the stepped bolt 21 to move again (also a relative movement, the actual moving part is the movable block 3) to the bottom of the strip groove 31. After the guide post 30 moves to the second end of the strip groove 31, the guide post 30 will disengage from the second end of the guide groove 100. After that, the movable block 3 rotates around the pivot 13, and the movable block 3 no longer applies tension to the unlocking component. In addition, the preset distance can be a distance that allows the upper pull cable 51 to pull the unlocking block 73 and cause the unlocking teeth 72 to separate from the locking teeth 63.

[0050] In addition, such as Figures 1 to 8 As shown, according to a second aspect of the present invention, a vehicle is provided, the vehicle including a folding linkage mechanism for a vehicle seat as described above. The folding linkage mechanism for the vehicle seat is disposed on the seat of the vehicle.

[0051] During use, when the backrest frame 2 pivots from the first position 91 to the second position 92, the guide post 30 moves from the first end of the guide groove 100 to the inflection point. At this time, the lower end of the pull cable 5 is pulled downwards a preset distance, and the upper end of the pull cable 5 pulls the unlocking block 73 upwards, causing the unlocking tooth 72 to pivot. This causes the unlocking tooth 72 to separate from the locking tooth 63, and the headrest 4 folds forward under the drive of the drive component 8, thereby preventing the headrest 4 from interfering with the front seat when the backrest frame 2 folds forward. Afterwards, the backrest frame 2 continues to fold forward until it reaches its position, and the guide post 30 of the movable block 3 moves from the inflection point of the guide groove 100 to the second end of the guide groove 100 until it disengages from the guide groove 100. When the seat needs to be straightened, the user can manually fold the backrest frame 2 backward. At this time, the guide post 30 of the movable block 3 will return from the second end of the guide groove 100 back into the guide groove 100 and move along the extension trajectory of the guide groove 100 to the first end of the guide groove 100. After the seat back is straightened, the user can fold the headrest 4 backward, so that the unlocking tooth 72 and the locking tooth 63 re-engage, after which the locking component can resume its function.

[0052] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A folding linkage mechanism for a vehicle seat, characterized in that, The folding linkage mechanism of the vehicle seat includes: The foundation support is equipped with a fixing block, and the fixing block has a guide groove. The backrest frame is pivotally mounted to the foot support; A movable block is movably installed on the backrest frame. The movable block rotates with the backrest frame. The movable block is provided with a guide post, which is engaged in the guide groove. A headrest, pivotally mounted to the backrest frame, the headrest having a drive component that causes it to fold forward under the action of the drive component; and A locking component is installed on the headrest. When the locking component is locked, the headrest cannot be folded forward. The locking component is provided with a pull line. The lower end of the pull line is connected to the movable block. After the lower end of the pull line is pulled a preset distance, the locking component is unlocked, allowing the headrest to fold forward. During the forward folding of the backrest frame, the guide post slides from the first end of the guide groove to the second end, and drives the movable block to pull the lower end of the pull line a preset distance.

2. The folding linkage mechanism for a vehicle seat according to claim 1, characterized in that, The guide groove is V-shaped, with the first and second ends of the guide groove being higher than the inflection point in the middle of the guide groove. During the process of the guide post moving to the inflection point, the lower end of the pull line is pulled a preset distance.

3. The folding linkage mechanism for a vehicle seat according to claim 2, characterized in that, The backrest frame is provided with a number of stepped bolts, and the movable block is provided with a number of strip grooves. The stepped bolts pass through the strip grooves and can move within the strip grooves. During the process of the guide column moving from the first end of the guide groove to the inflection point, the stepped bolts move from the bottom end of the strip groove to the top end of the strip groove.

4. The folding linkage mechanism for a vehicle seat according to claim 1, characterized in that, The foot support includes a first leg and a second leg arranged opposite to each other, and a pivot is provided between the first leg and the second leg. The backrest frame is pivotally mounted on the pivot, and a clearance hole is provided in the middle of the movable block, through which the pivot passes.

5. The folding linkage mechanism for a vehicle seat according to claim 1, characterized in that, The locking component includes: Fixing components, installed on the backrest frame; and A movable component is installed on the headrest. The movable component can engage with the fixed component, preventing the headrest from folding forward. The upper end of the pull cord is connected to the movable component. When the lower end of the pull cord is pulled a preset distance, the movable component separates from the fixed component.

6. The folding linkage mechanism for a vehicle seat according to claim 5, characterized in that, The fixing component includes: Insert rods, two of which are spaced apart from each other, the lower end of the insert rods is fixed to the backrest frame, the upper end of the insert rods is inserted into the headrest, and the pull cable passes through one of the insert rods; A crossbeam is disposed within the headrest, with its two ends respectively connected to the top ends of the two insert rods; and A locking tooth is provided in the middle of the crossbeam. The locking tooth can engage with the movable component, so that the headrest cannot be folded forward.

7. The folding linkage mechanism for a vehicle seat according to claim 6, characterized in that, The active components include: Unlock the hinge; it is located inside the headrest. The unlocking tooth is pivotally mounted on the unlocking shaft, and the unlocking tooth can engage with the locking tooth; An unlocking lever is movably disposed within the headrest. The unlocking lever is connected to the top end of the pull cable and is pivotally connected to the locking tooth. When the pull cable pulls the unlocking lever, the unlocking lever drives the unlocking tooth to separate from the locking tooth. A U-shaped guide is disposed within the headrest, with the opening of the U-shaped guide facing downwards. A pull cable passes from the first end of the U-shaped guide to the second end, and an unlocking pull block is disposed below the U-shaped guide. A first spring, one end of which abuts against the second end of the U-shaped guide, and the other end of which abuts against the top of the unlocking pull block, with the pull wire threaded through the first spring.

8. The folding linkage mechanism for a vehicle seat according to claim 7, characterized in that, The headrest includes a front cover and a rear cover that interlock with each other. The driving component and the movable component are sandwiched between the front cover and the rear cover. A rib is provided between the front cover and the rear cover. The unlocking pull block moves in the slide formed by the rib. The driving component is a torsion spring. One end of the driving component is connected to the fixed component, and the other end of the driving component is connected to the headrest. When the headrest is not folded into place, the driving component continuously applies an elastic force to the headrest to fold it forward.

9. The folding linkage mechanism for a vehicle seat according to claim 5, characterized in that, The pull cable includes an upper pull cable and a lower pull cable. The upper end of the upper pull cable is connected to the movable component, and the lower end of the lower pull cable is connected to the movable block. The folding linkage mechanism of the vehicle seat also includes a cable connector. The cable connector has a cavity inside. The lower end of the upper pull cable and the upper end of the lower pull cable are engaged in the cavity. The lower end of the upper pull cable and the upper end of the lower pull cable can move within the cavity. A second spring is also provided in the cavity. The top end of the second spring abuts against the upper end of the lower pull cable, and the bottom end of the second spring abuts against the bottom of the cavity.

10. A vehicle, characterized in that, The vehicle includes the folding linkage mechanism for the vehicle seat as described in any one of claims 1 to 9.

Images