Adjusting assembly and seat comprising same

Abstract

The utility model provides an adjusting assembly and a seat comprising the same. The adjusting assembly comprises a base frame used for being fixed to the outside; the rear part of the cushion frame in the length direction is rotatably connected to the base frame, and the front part of the cushion frame in the length direction is connected to the base frame through an inclination adjusting connecting rod assembly; the inclination adjusting connecting rod assembly comprises a front upper connecting rod and a rear upper connecting rod, wherein the front upper connecting rod is rotatably and directly connected to the seat cushion frame; the front lower connecting rod is rotatably and directly connected to the base frame and the front upper connecting rod respectively; the motor driving assembly comprises a lead screw motor, a lead screw connecting piece, a releasable connecting piece and a rear connecting fulcrum; the screw rod connecting piece is pivotally connected with the front lower connecting rod; the front portion of the lead screw motor is connected with the lead screw connecting piece, and the rear portion of the lead screw motor is connected with the rear connecting fulcrum.

Description

Technical Field

[0001] This application relates to adjustment components and seats including the same. Background Technology

[0002] Car seats generally include a backrest and a seat cushion. With the development of car user needs, in order to provide passengers with a comfortable riding experience, the seat cushion can be designed to be adjustable in tilt angle, so that passengers can adjust it according to their needs, such as realizing the function of a zero-gravity seat.

[0003] However, when occupants use the zero-gravity mode of a zero-gravity seat to rest or lie down, the tilted posture poses a safety risk in the event of a collision. For example, the impact force could cause the occupant to slide under the seatbelt, making it difficult for the airbags to provide adequate protection. Therefore, zero-gravity seats need to be able to quickly adjust and return to a non-zero-gravity position during a collision to provide better safety protection for occupants.

[0004] The inventors discovered that existing adjustment components that achieve rapid adjustment need further improvements in response speed and structural strength. Utility Model Content

[0005] The purpose of this application is to provide an adjustment component.

[0006] Another objective of this application is to provide a seat.

[0007] An adjustment assembly according to a first aspect of this application includes: a base frame for fixing to an external surface; a seat frame rotatably connected to the base frame at its rear in the longitudinal direction and connected to the base frame at its front in the longitudinal direction via a tilt adjustment linkage assembly; the tilt adjustment linkage assembly includes: a front upper linkage rotatably directly connected to the seat frame; a front lower linkage rotatably directly connected to the base frame and the front upper linkage, respectively; a motor drive assembly including a lead screw motor, a lead screw connector, a releasable connector, and a rear connecting fulcrum; the lead screw connector is pivotally connected to the front lower linkage; the lead screw motor is connected to the lead screw connector at the front and to the rear connecting fulcrum at the rear; the adjustment assembly has a first state and a second state: in the first state, the lead screw motor maintains its output to the lead screw connector through the fixing action of the releasable connector; in the second state, the releasable connector is released, and the lead screw motor cuts off its output to the lead screw connector.

[0008] In one or more embodiments of the adjustment assembly, the lead screw motor is fixedly connected to the lead screw connector at the front and is relatively fixed to the rear connection fulcrum via a releasable connector at the rear.

[0009] In one or more embodiments of the adjustment assembly, the rear connection fulcrum is provided with a sliding groove, which slides in conjunction with the protrusion of the lead screw motor. In the second state, the releasable connector is released, the lead screw motor cuts off the output to the lead screw connector, and the lead screw motor moves along the direction of the sliding groove.

[0010] In one or more embodiments of the adjustment assembly, the lead screw motor is fixed relative to the lead screw connector at the front via a releasable connector, and is fixedly connected to the rear connecting fulcrum at the rear.

[0011] In one or more embodiments of the adjustment assembly, the lead screw motor and the lead screw connector are pivotally connected via a releasable connector. In the second state, the releasable connector is released, and the lead screw motor is directly disengaged from the lead screw connector.

[0012] In one or more embodiments of the adjustment assembly, an unlocking bracket is further included. The lead screw motor and the lead screw connector are connected through the unlocking bracket, and the unlocking bracket and the lead screw motor are directly fixed relative to each other through the releasable connector. The unlocking bracket and the lead screw connector are rotatably connected. In the second state, the releasable connector is released, and the rotation of the lead screw connector causes the unlocking bracket to rotate or translate relative to the lead screw motor.

[0013] In one or more embodiments of the adjusting assembly, the releasable connector includes an explosive bolt, which explodes and releases in the second state; or the releasable connector includes an elastic component, including an actuator and an elastic element, wherein in the first state, the elastic element is constrained such that the lead screw motor maintains its output to the lead screw connector through the fixing action of the releasable connector; in the second state, the actuator actuates to release the constraint of the elastic element, the releasable connector is released, and the lead screw motor cuts off its output to the lead screw connector; preferably, the releasable connector further includes a sensing element capable of sensing the change from the first state to the second state and outputting a sensing signal, and a release signal obtained based on the sensing signal can be transmitted to the explosive bolt for explosive release, or transmitted to the actuator to release the driving force.

[0014] In one or more embodiments of the adjustment assembly, it further includes: a cable connected at one end to the base frame and at the other end to the seat frame; the length of the cable between the two ends is variable; preferably, it further includes a pretensioner connected to one end of the cable, wherein in a first state, the seat frame is lifted relative to the base frame on the other side in the longitudinal direction by a tilt adjustment linkage assembly, and the length of the cable housed in the pretensioner is pulled out from inside the pretensioner; in a second state, the length of the cable is retracted into the pretensioner.

[0015] A seat according to a second aspect of this application includes: a seat cushion including an adjustment assembly as described in the first aspect; and a backrest rotatably connected to the seat cushion.

[0016] In one or more embodiments of the seat, the seat is a zero-gravity seat; in the first state, the seat is in a zero-gravity mode; and in the second state, the seat is in a collision accident mode.

[0017] The beneficial effects of this application include, but are not limited to, fast response speed achieved by fixing or releasing the lead screw motor and the releasable connector, enabling rapid return to its original position during a collision. This allows the zero-gravity seat to adjust quickly during a collision to position the occupant in a better position for protection by safety components (such as seat belts and / or airbags). Furthermore, the embodiment does not require damaging or weakening the linkages that enable the zero-gravity function (e.g., no need to drill holes in the upper or lower front linkages to create a corresponding releasable structure), thus ensuring the strength and safety of the adjustment assembly and the seat. Additionally, the lead screw motor can be fixed to either the front or rear via the releasable connector, allowing the adjustment assembly to adapt to various installation space requirements. Attached Figure Description

[0018] The above and other features, properties, and advantages of this application will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always denote the same features. It should be noted that these drawings are merely illustrative and are not drawn to scale, and should not be construed as limiting the scope of protection actually claimed by this application, wherein:

[0019] Figure 1 This is a structural schematic diagram of a seat according to one or more embodiments.

[0020] Figures 2 to 3 This is a structural schematic diagram of the adjustment component at different angles in the first embodiment.

[0021] Figures 4 to 6This is a schematic diagram of the releasable connector of the adjustment component in the first embodiment.

[0022] Figures 7 to 8 This is a schematic diagram of the adjustment component at different angles in the second embodiment.

[0023] Figures 9 to 11 These are schematic diagrams of the adjustment component of the second embodiment, corresponding to the initial position in the first state, the zero-gravity position in the first state, and the recovery position in the second state.

[0024] Figures 12 to 14 This is a structural schematic diagram of the adjustment component at different angles in the third embodiment.

[0025] Figures 15 to 17 These are schematic diagrams of the adjustment component of the third embodiment, corresponding to the initial position in the first state, the zero-gravity position in the first state, and the recovery position in the second state.

[0026] Figures 18 to 20 This is a structural schematic diagram of the adjustment component at different angles in the fourth embodiment.

[0027] Figures 21 to 23 These are schematic diagrams of the adjustment component of the fourth embodiment, corresponding to the initial position in the first state, the zero-gravity position in the first state, and the recovery position in the second state.

[0028] Figures 24 to 27 The following are simplified diagrams illustrating the motion principles of the first, second, third, and fourth embodiments, respectively.

[0029] Figure label:

[0030] 1000-seat

[0031] 1001-Seat Cushion

[0032] 1002-Backrest

[0033] 10-Adjustment Components

[0034] 101 - First State

[0035] 102 - Second State

[0036] 1-Base Frame

[0037] 2-Seat Cushion Frame

[0038] 31-Front Upper Linkage

[0039] 32-Front Lower Link

[0040] 33-Motor drive assembly

[0041] 331-Screw Motor

[0042] 332-Screw Connector

[0043] 333 - Releasable Connector

[0044] 3331-Explosion Bolt

[0045] 3332-Elastic Component

[0046] 33321-Actuator

[0047] 33322-Elastic Component

[0048] 33323-Pin Parts

[0049] 3333 - Sensing Element

[0050] 334-Back Connecting Pivot

[0051] 3341-Slide

[0052] 33411-First Slide

[0053] 33412 - Second Slide

[0054] 33413-Third Slide

[0055] 335-Unlocking Stand

[0056] 3351 - Releasable Connection Hole

[0057] 3352-Spindle Hole

[0058] 3353-Fixing Hole

[0059] 3311-Protrusion

[0060] 5-Cable component

[0061] 6-Pretensioner. Detailed Implementation

[0062] Reference will now be made in detail to various embodiments of this application, examples of which are shown in the accompanying drawings and described below. Although this application will be described in conjunction with exemplary embodiments, it should be understood that this application is not intended to be limited to those exemplary embodiments. Rather, this application is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents, and other embodiments that may be included within the spirit and scope of this application as defined by the appended claims.

[0063] This application uses specific terms to describe embodiments of the application. For example, "an embodiment" and / or "one embodiment" refers to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment" or "one embodiment" mentioned twice or more in different locations in this application does not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0064] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0065] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. This application uses flowcharts to illustrate the operations performed according to the embodiments of this application. It can be understood that, depending on the actual situation, the steps in the drawings are not necessarily performed sequentially. Other operations can be added to these processes, or one or more steps can be removed from these processes.

[0066] Although the adjustment components disclosed in this application are applicable to car seats to improve the safety of zero-gravity seats used in automobiles, they are not limited thereto. For example, they can be applied to other transportation applications, such as heavy vehicles, railway trains, and ships, as well as fixed locations, such as meeting rooms, auditoriums, cinemas, and massage chairs. As long as the seat has the function of a zero-gravity seat, the adjustment components and adjustment methods described in this application can be applied.

[0067] refer to Figure 1 As shown, in some embodiments, the seat 1000 may include a seat cushion 1001 and a backrest 1002, which are rotatably connected, for example, by means of a recliner. The seat cushion 1001 may include the adjustment assembly 10, which will be described in detail in the following embodiments, to adjust the occupant's reclining posture to achieve the function of a zero-gravity seat.

[0068] refer to Figures 2 to 27 As shown, in some embodiments, the adjustment assembly 10 includes a base frame 1, a seat cushion frame 2, and a tilt adjustment linkage assembly.

[0069] The base frame 1 is used for fixing to the outside, such as fixing to an external slide rail or bottom surface, and adjusting the base of the component 10.

[0070] The seat cushion frame 2 can house the seat cushion foam and covering material in the actual seat, thus providing the frame structure for the seat cushion. The seat cushion frame 2 is rotatably connected to the base frame 1 at its rear along the length direction, and connected to the base frame 1 at its front along the length direction via a tilt adjustment linkage assembly. The rotatable connection between the seat cushion frame 2 and the base frame 1 can be a direct rotatable connection as shown in the figure, or an indirect rotatable connection via a linkage assembly or other structure, such as an indirect connection through a height adjustment mechanism; neither is limited to this method.

[0071] The tilt adjustment linkage assembly includes: a front upper linkage 31, a front lower linkage 32, and a motor drive assembly 33.

[0072] The upper front link 31 is rotatably and directly connected to the seat frame 2, and the lower front link 32 is rotatably and directly connected to the base frame 1 and the upper front link 31, respectively.

[0073] The motor drive assembly 33 includes a lead screw motor 331, a lead screw connector 332, a releasable connector 333, and a rear connecting fulcrum 334; the lead screw connector 332 is pivotally connected to the front lower connecting rod 32; the lead screw motor 331 is connected to the lead screw connector 332 at the front and to the rear connecting fulcrum 334 at the rear.

[0074] refer to Figures 2 to 27 As shown, the adjustment component 10 has a first state 101 and a second state 102.

[0075] In the first state 101, the lead screw motor 331 maintains its output to the lead screw connector 332 through the fixing action of the releasable connector 333.

[0076] In the second state 102, the releasable connector 333 is released, and the lead screw motor 331 cuts off the output to the lead screw connector 332.

[0077] The structures of the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment will be described in detail below to illustrate the first state and the second state described above.

[0078] refer to Figures 2 to 6 ,as well as Figure 24 As shown, in the first embodiment, the lead screw motor 331 is fixedly connected to the lead screw connector 332 at the front, and relatively fixed to the rear connecting fulcrum 334 via a releasable connector 333 at the rear. (Reference) Figures 3 to 6 As shown, the structure for connecting the lead screw motor 331 to the rear connecting fulcrum 334 can be a sliding groove structure. Specifically, the rear connecting fulcrum 334 has a sliding groove 3341, which slides in cooperation with the protrusion 3311 of the lead screw motor 331. In the second state 102, the releaseable connector 333 is released, the lead screw motor 331 cuts off the output to the lead screw connector 332, and the lead screw motor 331 moves along the direction of the sliding groove 3341. For the specific structure of the sliding groove 3341, please refer to... Figures 4 to 6 What is shown can be Figure 4 The parallel guide groove 33411 and the fracture-type energy-absorbing guide groove shown are, for example, Figure 5 As shown, based on the parallel guide groove 33411, a fracture energy absorption structure 33412 can be added to increase the energy absorption effect. Alternatively, it can also be... Figure 6 The structure of the inward-retracting guide groove 33413 shown is as follows: Figure 6 As shown, the width at both ends narrows from the outside to the inside. The width at one end is D1, and the width at the other end is D2. D1 is greater than D2, but it can be understood that the range of D1 being greater than D2 should not be too large, generally around 10%, and the width gradually narrows, which can also play a role in energy absorption. This is not a limitation.

[0079] And for Figures 7 to 23 In the second, third, and fourth embodiments shown, the lead screw motor 331 is fixed relative to the lead screw connector 332 at the front via a releasable connector 333, and is fixedly connected to the rear connecting fulcrum 334 at the rear.

[0080] In the second embodiment, reference Figures 7 to 11 ,as well as Figure 25 As shown, the lead screw motor 331 and the lead screw connector 332 are pivotally connected by a releasable connector 333. In the second state 102, the releasable connector 333 is released, and the lead screw motor 331 is directly disengaged from the lead screw connector 332.

[0081] like Figure 9 As shown, in the first state 101, the lead screw motor 331 and the lead screw connector 332 are pivotally connected via the releasable connector 333. This is the normal state of the seat, i.e., the non-collision state. Since the lead screw motor 331 and the lead screw connector 332 are pivotally connected via the releasable connector 333, the motor drive assembly 33 can drive the lower front link 32, which in turn drives the upper front link 31 to achieve tilt adjustment, fixing the rear end of the seat cushion frame 2 in the length direction while relatively raising the front end. Figure 9 The initial position shown is raised to Figure 10The zero-gravity position is used to provide zero-gravity seating functionality.

[0082] In the second state 102, the releasable connector 333 is released, and the lead screw motor 331 cuts off its output to the lead screw connector 332. For details, please refer to... Figure 11 For example, if the seat is in collision mode, such as when a collision occurs or when the system predicts that the probability of a collision exceeds a threshold, the release connector 333 is released, and the lead screw motor 331 disengages directly from the lead screw connector 332, causing the front end of the seat cushion frame 2 to lower and return to its original position. Figure 10 The relatively elevated zero-gravity position shown quickly returns to its original position. Figure 11 The safe position shown can coincide with or not coincide with the initial position, and can be adjusted according to the safety requirements of different seat models. The specific motion transmission path can be as follows: In a collision accident mode, because the lead screw motor 331 is directly disengaged from the lead screw connector 332, the seat cushion frame 2 is subjected to the occupant's gravity and its front end moves downward, driving the upper front connecting rod 31, which in turn drives the lower front connecting rod 32, which is rotatably connected to it. Since the lead screw motor 331 is directly disengaged from the lead screw connector 332, the rotation of the lower front connecting rod 32 completes the motion path. The advantage of using the second embodiment is its simple structure.

[0083] In the third embodiment, reference is made to... Figures 12 to 17 ,as well as Figure 26 As shown, an unlocking bracket 335 is used. The lead screw motor 331 and the lead screw connector 332 are connected through the unlocking bracket 335, and the unlocking bracket 335 and the lead screw motor 331 are directly fixed relative to each other through a releasable connector 333. The unlocking bracket 335 and the lead screw connector 332 are rotatably connected. In the second state, the releasable connector 333 is released, and the rotation of the lead screw connector 332 causes the unlocking bracket 335 to rotate relative to the lead screw motor 331. Figure 13 as well as Figure 14 As shown, the structure that enables relative rotation can be such that the unlocking bracket 335 has a releasable connection hole 3351 and a rotating shaft hole 3352. After release, the releasable connector 333 is disconnected from the unlocking bracket 335 in the releasable connection hole 3351, so that the rotation of the lead screw connector 332 drives the unlocking bracket 335 to rotate relative to the lead screw motor 331 around the rotating shaft hole 3352.

[0084] Specifically, such as Figure 15As shown, in the first state 101, the lead screw motor 331 and the lead screw connector 332 are connected via the unlocking bracket 335, and the unlocking bracket 335 and the lead screw motor 331 are directly fixed relative to each other via the releasable connector 333. The unlocking bracket 335 and the lead screw connector 332 are rotatably connected. This is the normal state of the seat, i.e., the non-collision state. Since the lead screw motor 331 and the lead screw connector 332 are connected via the unlocking bracket 335, and the unlocking bracket 335 and the lead screw motor 331 are directly fixed relative to each other via the releasable connector 333, and the unlocking bracket 335 and the lead screw connector 332 are rotatably connected, the motor drive assembly 33 can drive the lower front link 32, which in turn drives the upper front link 31 to achieve tilt adjustment, so that the rear end of the seat cushion frame 2 is fixed in the length direction, while the front end is relatively raised. Figure 15 The initial position shown is raised to Figure 16 The zero-gravity position is used to provide zero-gravity seating functionality.

[0085] In the second state 102, the releasable connector 333 is released, and the lead screw motor 331 cuts off its output to the lead screw connector 332. For details, please refer to... Figure 17 For example, if the seat is in collision mode, such as when a collision occurs or when the system predicts that the probability of a collision exceeds a threshold, the release connector 333 is released. The rotation of the lead screw connector 332 causes the unlocking bracket 335 to rotate relative to the lead screw motor 331, causing the front end of the seat cushion frame 2 to lower and return to its original position. Figure 16 The relatively elevated zero-gravity position shown quickly returns to its original position. Figure 17 The safe position shown can coincide with or not coincide with the initial position, and can be adjusted according to the safety requirements of different seat models. The specific motion transmission path can be as follows: In the collision accident mode, the seat cushion frame 2 is subjected to the occupant's gravity and the front end moves downward, driving the upper front link 31, which in turn drives the lower front link 32 connected to it. Due to the rotation of the lead screw connector 332, the unlocking bracket 335 rotates relative to the lead screw motor 331 without driving the lead screw motor 331, thus achieving a rapid recovery from the zero-gravity position to the safe position.

[0086] In the fourth embodiment, reference Figures 18 to 23 ,as well as Figure 27As shown, the fourth embodiment is similar to the third embodiment, employing an unlocking bracket 335 structure. The lead screw motor 331 and the lead screw connector 332 are connected via the unlocking bracket 335, and the unlocking bracket 335 and the lead screw motor 331 are directly fixed relative to each other via a releasable connector 333. The unlocking bracket 335 and the lead screw connector 332 are rotatably connected; in the second state, the releasable connector 333 is released. However, unlike the third embodiment, the rotation of the lead screw connector 332 causes the unlocking bracket 335 to translate relative to the lead screw motor 331.

[0087] like Figure 19 as well as Figure 20 As shown, the structure that enables relative rotation can be such that the unlocking bracket 335 has a fixing hole 3353 and is sleeved on the outside of the lead screw of the lead screw motor 331. The pin 33323 of the releaseable connector 333 fixes the lead screw motor 331 and the unlocking bracket 335 through the fixing hole 3353. After the releaseable connector 333 is released, the connection between the releaseable connector 333 and the unlocking bracket 335 is disengaged. The rotation of the lead screw connector 332 causes the unlocking bracket 335 to translate relative to the lead screw of the lead screw motor 331 sleeved inside the unlocking bracket 335 along the moving direction defined by the unlocking bracket 335.

[0088] Specifically, such as Figure 21 As shown, in the first state 101, the lead screw motor 331 and the lead screw connector 332 are connected via the unlocking bracket 335, and the unlocking bracket 335 and the lead screw motor 331 are directly fixed relative to each other via the releasable connector 333. The unlocking bracket 335 and the lead screw connector 332 are rotatably connected. This is the normal state of the seat, i.e., the non-collision state. Since the lead screw motor 331 and the lead screw connector 332 are connected via the unlocking bracket 335, and the unlocking bracket 335 and the lead screw motor 331 are directly fixed relative to each other via the releasable connector 333, and the unlocking bracket 335 and the lead screw connector 332 are rotatably connected, the motor drive assembly 33 can drive the lower front link 32, which in turn drives the upper front link 31 to achieve tilt adjustment, so that the rear end of the seat cushion frame 2 is fixed in the length direction, while the front end is relatively raised. Figure 21 The initial position shown is raised to Figure 22 The zero-gravity position is used to provide zero-gravity seating functionality.

[0089] In the second state 102, the releasable connector 333 is released, and the lead screw motor 331 cuts off its output to the lead screw connector 332. For details, please refer to... Figure 23For example, if the seat is in collision mode, such as when a collision occurs or when the system predicts that the probability of a collision exceeds a threshold, the pin 33323 of the release connector 333 fixes the screw motor 331 and the unlocking bracket 335 through the fixing hole 3353. After the release connector 333 is released, the connection between the release connector 333 and the unlocking bracket 335 is disengaged. The rotation of the screw connector 332 causes the unlocking bracket 335 to translate relative to the screw motor 331 fitted inside the unlocking bracket 335 along the movement direction defined by the unlocking bracket 335, causing the front end of the seat cushion frame 2 to lower and return to its original position. Figure 22 The relatively elevated zero-gravity position shown quickly returns to its original position. Figure 23 The safe position shown can coincide with or not coincide with the initial position, and can be adjusted according to the safety requirements of different seat models. The specific motion transmission path can be as follows: In the collision accident mode, the seat cushion frame 2 is subjected to the occupant's gravity and the front end moves downward, driving the upper front link 31, which in turn drives the lower front link 32 connected to it. The rotation of the lead screw connector 332 causes the unlocking bracket 335 to translate relative to the lead screw motor 331 sleeved inside the unlocking bracket 335 along the movement direction defined by the unlocking bracket 335, without driving the lead screw motor 331, thus achieving rapid recovery from the zero-gravity position to the safe position.

[0090] The rotation scheme of the third embodiment and the translation scheme of the fourth embodiment can be selected according to the specific installation space requirements.

[0091] Additionally, in some embodiments, the adjustment assembly 10 may further include: a cable 5, one end of which is connected to the base frame 1 and the other end to the seat frame 2; the length of the cable 5 between one end and the other end is variable; preferably, it further includes a pretensioner 6, which is connected to one end of the cable 5. In a first state 101, the seat frame 2 is raised relative to the base frame 1 on the other side in the length direction via a height adjustment linkage assembly, and the length of the cable 5 housed in the pretensioner 6 is pulled out from inside the pretensioner 6; in a second state 102, the length of the cable 5 is retracted into the pretensioner 6. It is understood that the structure employing cable 5 and pretensioner 6 provides a downward force to drive the front end of the seat cushion frame 2 during a collision, allowing for faster return to its original position. This is especially important in scenarios with stricter safety requirements. The inventors discovered that in some zero-gravity seat modes, the occupant's center of gravity is near the connection between the seat cushion and backrest. Relying solely on gravity for the downward restoring force during a collision results in a slower return. Therefore, the structure using cable 5 and pretensioner 6 further accelerates the return to its original position. However, it is understood that the return speed of a solution without cable 5 and pretensioner 6 generally meets safety requirements. Using cable 5 and pretensioner 6 is merely a further optimization of the aforementioned structure for enhanced safety. It is understood that cable 5 can pull down the front part of the seat cushion frame 2 precisely when a collision is triggered, thereby facilitating the return to its original position. It should be clarified that during the zero-gravity adjustment of the seat cushion, i.e., the raising and lowering of the front part of the seat cushion frame 2, the cable 5 is generally not under stress. The inventors discovered that applying stress would affect the adjustment of the seat cushion frame 2; that is, the cable 5 can be considered a rigid component, and its elastic force can be ignored. When a collision is triggered, regardless of whether the front part of the seat cushion frame 2 is raised to the middle or highest position, the pretensioner 6 will shorten the rope to a fixed minimum length, while simultaneously promoting the front part of the seat cushion frame 2 to be pulled to the lowest position.

[0092] The specific structure of the releasable connector 333 can be as shown in the first embodiment. The releasable connector 333 includes an elastic component 3332, including an actuator 33321 and an elastic component 33322. In the first state 101, the elastic component 33322 is constrained so that the lead screw motor 331 maintains its output to the lead screw connector 332 through the fixing action of the releasable connector 333. In the second state 102, the actuator 33321 is actuated so that the constraint of the elastic component 33322 is released, the releasable connector 333 is released, and the lead screw motor 331 cuts off its output to the lead screw connector 332.

[0093] Specifically, for example, actuator 33321 provides a driving force to compress elastic element 33323, providing an elastic force to clamp and provide a fixing force; in the second state 102, actuator 33321 releases the driving force, causing the elastic force of elastic element 33322 to be released to release the clamping force; preferably, elastic component 3332 further includes pin 33323, which is connected to actuator 33321 at one end and elastic element 33322 at the other end. The specific structure of actuator 33321 can be a conventional actuator, such as hydraulic drive, electromagnetic drive, and other common actuators, which will not be described in detail here. In some embodiments, elastic component 3332 further includes pin 33323, which is connected to actuator 33321 at one end and elastic element 33322 at the other end. Furthermore, the release direction of the pin 33323 can be from the outside to the inside in the width direction as shown in the figure, or vice versa, from the inside to the outside. This can be adjusted according to specific spatial arrangement requirements. It can be understood that the constraint and release structure between the actuator 33321 and the elastic element 33322 are not limited to the above description and can employ various different schemes. For example, one scheme could be that the actuator 33321 pulls the elastic element 33322; when the actuator 33321 is triggered, it pulls out the elastic element 33322 to release the constraint. For example, one solution is that the actuator 33321 can act as a lock and unlocker for the elastic element 33322. That is, in the normal state, the elastic element 33322 is in a compressed or extended state and has a tendency to move. However, due to the locking effect of the actuator 33321, the elastic element 33322 remains stationary. When triggered, the actuator 33321 releases the lock on the elastic element, and the compressed or extended state of the elastic element 33322 is released and it moves, thereby releasing the fixing effect.

[0094] Alternatively, as shown in the second embodiment, the releasable connector 333 includes an explosive bolt 3331, which explodes and releases in the second state 102.

[0095] The first embodiment using an actuator can be used multiple times and is easy to control, while the second embodiment using an explosion bolt has a simpler structure and can select different forms of releasable connectors according to actual needs.

[0096] Preferably, the releasable connector 333 may further include a sensing element 3333, which can sense the change from the first state 101 to the second state 102 and output a sensing signal. The release signal obtained from the sensing signal can be transmitted to the explosive bolt 3331 for explosive release, or transmitted to the actuator 33321 to release the driving force.

[0097] To identify accidents, the location of sensing element 3333 here is for illustrative purposes only. Sensing element 3333 can be a collision sensor, for example, configured as a pre-collision sensor. In the event of a collision, the collision sensor provides an output sensing signal. The vehicle's body control module (BCM), domain controller, or cloud controller of the vehicle network can calculate a release signal based on this sensing signal. The release signal obtained from this sensing signal can be transmitted to the burst bolt 3331 for explosive release, or transmitted to the actuator 33321 to release the driving force. Therefore, at the moment of an accident or when an accident is judged to be likely to occur, the front height of the seat cushion frame 2 quickly lowers back to its original position, thereby allowing the vehicle seat user, i.e., the occupant, to quickly return to their original position, ensuring vehicle safety.

[0098] In summary, the beneficial effects of the adjustment components and seats described in the above embodiments include, but are not limited to, fast response speed achieved by fixing or releasing the lead screw motor and the releasable connector, enabling rapid return to its original position during a collision. This allows the zero-gravity seat to quickly adjust to a better position for the occupant to receive protection from safety components (such as seat belts and / or airbags) during a collision. Furthermore, the embodiments do not require damaging or weakening the linkages that enable the zero-gravity function (e.g., no need to drill holes in the upper or lower front linkages to install corresponding releasable structures), thus ensuring the strength and safety of the adjustment components and seats. Additionally, the lead screw motor can be fixed to either the front or rear via the releasable connector, allowing the adjustment components to adapt to various installation space requirements.

[0099] While this application discloses preferred embodiments as described above, it is not intended to limit the scope of this application. Any changes and modifications can be made by those skilled in the art without departing from the spirit and scope of this application. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall fall within the protection scope defined by the claims of this application.

Claims

1. An adjustment component (10), characterized in that, include: The base frame (1) is used for fixing to the outside; The seat frame (2) is rotatably connected to the base frame (1) at the rear in the longitudinal direction and is connected to the base frame (1) at the front in the longitudinal direction via a tilt adjustment linkage assembly. The tilt adjustment linkage assembly includes: The front upper link (31) is rotatably and directly connected to the seat frame (2); The lower front link (32) is rotatably and directly connected to the base frame (1) and the upper front link (31). The motor drive assembly (33) includes a lead screw motor (331), a lead screw connector (332), a releasable connector (333), and a rear connection fulcrum (334); the lead screw connector (332) is pivotally connected to the front lower connecting rod (32); the lead screw motor (331) is connected to the lead screw connector (332) at the front and to the rear connection fulcrum (334) at the rear. The adjustment component (10) has a first state (101) and a second state (102): In the first state (101), the lead screw motor (331) maintains its output to the lead screw connector (332) through the fixing action of the releasable connector (333); In the second state (102), the releasable connector (333) is released, and the lead screw motor (331) cuts off the output to the lead screw connector (332).

2. The adjustment component (10) as described in claim 1, characterized in that, The lead screw motor (331) is fixedly connected to the lead screw connector (332) at the front and is relatively fixed to the rear connection fulcrum (334) via a releasable connector (333) at the rear.

3. The adjustment component (10) as described in claim 2, characterized in that, The rear connecting fulcrum (334) is provided with a sliding groove (3341), which slides in cooperation with the protrusion (3311) of the lead screw motor (331). In the second state (102), the releasable connector (333) is released, the lead screw motor (331) cuts off the output to the lead screw connector (332), and the lead screw motor (331) moves along the direction of the sliding groove (3341).

4. The adjustment component (10) as described in claim 1, characterized in that, The lead screw motor (331) is fixed relative to the lead screw connector (332) at the front via a releasable connector (333), and is fixedly connected to the rear connecting fulcrum (334) at the rear.

5. The adjustment component (10) as described in claim 4, characterized in that, The lead screw motor (331) and the lead screw connector (332) are pivotally connected by a releasable connector (333). In the second state (102), the releasable connector (333) is released, and the lead screw motor (331) is directly disengaged from the lead screw connector (332).

6. The adjustment component (10) as claimed in claim 4, characterized in that, It also includes an unlocking bracket (335), the lead screw motor (331) and the lead screw connector (332) are connected through the unlocking bracket (335), and the unlocking bracket (335) and the lead screw motor (331) are directly fixed relative to each other through the releasable connector (333). The unlocking bracket (335) and the lead screw connector (332) are rotatably connected. In the second state, the releasable connector (333) is released, and the rotation of the lead screw connector (332) causes the unlocking bracket (335) to rotate or translate relative to the lead screw motor (331).

7. The adjusting component (10) as described in any one of claims 1-6, characterized in that, The releasable connector (333) includes an explosive bolt (3331), which explodes and releases in the second state (102); or The releasable connector (333) includes an elastic component (3332), including an actuator (33321) and an elastic element (33322). In the first state (101), the elastic element (33322) is constrained such that the lead screw motor (331) maintains its output to the lead screw connector (332) through the fixing action of the releasable connector (333). In the second state (102), the actuator (33321) actuates to release the constraint of the elastic element (33322), the releasable connector (333) is released, and the lead screw motor (331) cuts off the output to the lead screw connector (332).

8. The adjustment component (10) as claimed in claim 7, characterized in that, The releasable connector (333) also includes a sensing element (3333) that can sense the change from the first state (101) to the second state (102) and output a sensing signal. The release signal obtained from the sensing signal can be transmitted to the explosive bolt (3331) for explosive release, or transmitted to the actuator (33321) for release of driving force.

9. The adjusting component (10) as described in any one of claims 1-6, characterized in that, Also includes: A cable (5) is connected at one end to the base frame (1) and at the other end to the cushion frame (2); the length of the cable (5) between one end and the other end is variable.

10. The adjustment component (10) as claimed in claim 9, characterized in that, It also includes a pretensioner (6) connected to one end of the cable (5). In the first state (101), the seat frame (2) is lifted relative to the base frame (1) on the other side of the length direction by a tilt adjustment linkage assembly, and the length of the cable (5) contained in the pretensioner (6) is pulled out from the inside of the pretensioner (6). In the second state (102), the length of the cable (5) is retracted into the pretensioner (6).

11. A seat (1000), characterized in that, include: The seat cushion (1001) includes the adjustment component (10) as described in any one of claims 1-10. as well as The backrest (1002) is rotatably connected to the seat cushion (1001).

12. The seat (1000) as claimed in claim 11, characterized in that, The seat (1000) is a zero-gravity seat. In the first state (101), the seat (1000) is in zero-gravity mode, and in the second state (102), the seat is in collision accident mode.

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