Automobile seat with height adjusting function

Abstract

The utility model relates to an automobile seat with a height adjusting function, which comprises a cushion wall plate and a slide rail assembly, and further comprises a rear connecting rod, a first end of the rear connecting rod is hinged to the rear part of the cushion wall plate, and a second end of the rear connecting rod is hinged to the slide rail assembly; the first end of each first rack is hinged to the corresponding rear connecting rod; the height adjusting motor is arranged on the sliding rail assembly and can drive the first rack to move so as to drive the rear connecting rod to rotate to adjust the height of the seat cushion wall plate; the first end of the front connecting rod assembly is hinged to the front portion of the seat cushion wall plate, and the second end of the front connecting rod assembly is hinged to the sliding rail assembly; and the collision lock mechanism can lock the relative position between the seat cushion wall plate and the sliding rail assembly under the action of collision load. The height adjusting motor and the first rack are arranged to achieve driving, the arranged collision lock mechanism can help the arranged rear connecting rod and the arranged front connecting rod to share a certain load, therefore, the strength and the number of mechanism parts can be reduced, and the weight and the cost of a seat framework are further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle seats, in particular to a vehicle seat with a height adjustment function. Background Art

[0002] The full name of zero-gravity seat is Zero-Gravity-Seats, which is a technology used in car seats. It refers to ergonomic theory and improves passenger comfort by reducing gravity concentration.

[0003] The seat cushion assembly of a zero-gravity car seat features height adjustment, typically achieved through a linkage structure and motors. To ensure occupant safety and comfort, the upper seatbelt anchor point is integrated into the backrest, while the lower anchor point is integrated into the seat cushion panel. This layout increases the load on the seat cushion linkage system, increases the strength and number of mechanical components, and increases the weight and cost of the seat frame. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art and provide a car seat with a height adjustment function, so as to solve the problems that the safety belt layout of the existing zero-gravity car seat leads to an increase in the load of the seat cushion connecting rod system, and the increase in the strength and number of mechanical components leads to an increase in the weight and cost of the seat frame.

[0005] The technical solution to achieve the above purpose is:

[0006] The utility model provides a car seat with a height adjustment function, comprising a seat cushion wall plate and a slide rail assembly, and the car seat further comprises:

[0007] a rear connecting rod, wherein a first end of the rear connecting rod is hingedly connected to a rear portion of the seat cushion wall panel, and a second end of the rear connecting rod is hingedly connected to the slide rail assembly;

[0008] a first rack, wherein a first end of the first rack is hingedly connected to a corresponding rear link;

[0009] A high-adjustment motor is provided on the slide rail assembly and is drivingly connected to the first rack, and can drive the first rack to move and thereby drive the rear connecting rod to rotate to adjust the height of the seat cushion wall panel;

[0010] a front link assembly, wherein a first end of the front link assembly is hingedly connected to the front portion of the seat cushion wall panel, and a second end of the front link assembly is hingedly connected to the slide rail assembly;

[0011] A collision lock mechanism is provided on the corresponding seat cushion wall panel and slide rail assembly. Under the action of a collision load, the collision lock mechanism can lock the relative position between the seat cushion wall panel and the slide rail assembly.

[0012] A further improvement of the car seat with height adjustment function of the present utility model is that the collision lock mechanism includes a second rack and a locking claw arranged opposite to each other;

[0013] One of the second rack and the locking pawl is provided on the slide rail assembly; the other of the second rack and the locking pawl is provided on the seat cushion wall panel or the rear connecting rod; or the second rack is provided on the rear connecting rod and the locking pawl is provided on the seat cushion wall panel;

[0014] Under the action of a collision load, the locking pawl can be clamped with the second rack to achieve locking.

[0015] A further improvement of the automobile seat with height adjustment function of the present utility model is that the second rack is fixedly connected to the slide rail assembly;

[0016] The locking claw is connected to the rear connecting rod;

[0017] The locking pawl can move toward the second rack under the action of a collision load and then be clamped with the second rack.

[0018] A further improvement of the car seat with height adjustment function of the present invention is that the second rack is rotatably connected to the slide rail assembly;

[0019] The locking claw is provided on the rear connecting rod;

[0020] The locking pawl can rotate along with the rear connecting rod. Under the action of a collision load, the second rack and the locking pawl can rotate toward each other and then be clamped.

[0021] A further improvement of the car seat with height adjustment function of the present invention is that the second rack is rotatably connected to the slide rail assembly or the second rack is provided on the rear connecting rod;

[0022] The locking claw is rotatably arranged on the seat cushion wall plate;

[0023] The locking pawl is connected to the safety belt, and the collision load acts on the locking pawl through the safety belt, so that the locking pawl rotates toward the second rack and is clamped with the second rack.

[0024] A further improvement of the car seat with height adjustment function of the utility model is that the middle part of the locking claw is rotatably connected to the seat cushion wall plate;

[0025] The seat cushion wall plate is provided with a first limiting portion supporting the second rack, a second limiting portion located above the second end of the locking claw, and an elastic member in contact with the first end of the locking claw;

[0026] The elastic member applies elastic force to the first end portion of the locking claw, so that the second end portion of the locking claw abuts against the second limiting portion and moves away from the second rack.

[0027] A further improvement of the car seat with height adjustment function of the present invention is that when the second rack is clamped with the locking claw, the reaction force applied by the second rack to the locking claw can cause the second end of the locking claw to rotate around its rotation center toward the direction of the second rack, thereby maintaining the locked state.

[0028] A further improvement of the car seat with height adjustment function of the present utility model is that a plurality of protruding teeth are provided on the second rack;

[0029] The second end of the locking pawl is provided with a matching tooth groove corresponding to the convex tooth, and the tooth groove can be engaged with the corresponding convex tooth.

[0030] A further improvement of the car seat with height adjustment function of the utility model is that the convex teeth have a first tooth surface and a second tooth surface connected to each other;

[0031] The tooth groove has a first groove wall and a second groove wall connected to each other;

[0032] When the second rack is clamped with the locking pawl, the first groove wall contacts the corresponding first tooth surface, and the force along the normal direction of the first tooth surface can cause the second end of the locking pawl to rotate around its rotation center toward the direction of the second rack, thereby maintaining the locked state.

[0033] A further improvement of the car seat with height adjustment function of the present invention is that the height adjustment motor is provided with a driving gear meshing with the first rack and a limiting member in contact with the other side of the first rack, and the limiting member limits the first rack so that the first rack remains in meshing state with the driving gear.

[0034] The beneficial effects of the car seat with height adjustment function of the utility model are:

[0035] The car seat with a height adjustment function of the present invention drives the rear connecting rod to rotate through the height adjustment motor and the first rack, thereby realizing the height adjustment function of the car seat, that is, raising the height of the seat cushion assembly. In the event of a collision, the relative position or relative height of the seat cushion wall panel and the slide rail assembly can be locked through the collision lock mechanism. The locking function of the collision lock mechanism can help the rear connecting rod and the front connecting rod to share a certain load, thereby reducing the strength and number of the mechanism components, and further reducing the weight and cost of the seat frame.

[0036] The car seat with height adjustment function of the present invention is provided with a collision lock mechanism including a second rack and a locking claw. When locking, the reaction force exerted by the second rack on the locking claw can enable the second end of the locking claw to rotate around its rotation center toward the second rack, thereby maintaining the locked state, making the locking function of the collision lock mechanism safe and reliable.

[0037] The car seat with a height adjustment function of the present invention is provided with a first rack and a height adjustment motor to achieve height adjustment of the seat cushion assembly, and the first rack, the height adjustment motor and the collision lock mechanism are arranged on both sides of the seat cushion assembly, which can achieve the effect of reducing costs and reducing seat weight while meeting the requirements of the adjustment function. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The utility model is a schematic diagram of the three-dimensional structure of the seat cushion assembly and the slide rail assembly of the automobile seat with height adjustment function.

[0039] Figure 2 This is a schematic diagram of the exploded structure of the rear structure of the seat cushion assembly of the automobile seat with height adjustment function of the present invention.

[0040] Figure 3 for Figure 2 A partial enlarged schematic diagram of the first rack and the high-adjustment motor.

[0041] Figure 4 This is a structural diagram of the location of the collision lock mechanism in the car seat with height adjustment function of the present invention.

[0042] Figure 5 for Figure 4 The schematic diagram of the structure shown is a structural diagram after the reinforcement plate is omitted.

[0043] Figure 6 The utility model is a structural schematic diagram of the collision lock mechanism in an unlocked state when the seat cushion assembly of the automobile seat with a height adjustment function is in a low position.

[0044] Figure 7 The utility model is a structural schematic diagram of the collision lock mechanism in a locked state when the seat cushion assembly of the automobile seat with a height adjustment function is in a low position.

[0045] Figure 8 The utility model is a structural schematic diagram of the collision lock mechanism in an unlocked state when the seat cushion assembly of the automobile seat with a height adjustment function is in a high position.

[0046] Figure 9 The utility model is a structural schematic diagram of the collision lock mechanism in a locked state when the seat cushion assembly of the automobile seat with a height adjustment function is in a high position.

[0047] Figure 10 This is a structural schematic diagram of the car seat with height adjustment function of the utility model in the designed position.

[0048] Figure 11 for Figure 10 The structure shown is a side view without the reinforcement plate.

[0049] Figure 12 This is a structural schematic diagram of the car seat with a height adjustment function of the utility model in the height adjustment position.

[0050] Figure 13 for Figure 12 The structure shown is a side view without the reinforcement plate.

[0051] Description of reference numerals:

[0052] 101 - rear tube; 102 - rear connecting rod; 103 - reinforcement plate; 104 - front connecting rod; 105 - first rack; 106 - high-adjustment motor; 107 - slide rail assembly; 109 - seat cushion wall panel; 110 - seat cushion assembly; 111 - drive gear; 112 - limiter;

[0053] 201—zero gravity connecting rod; 202—driving screw; 203—driving slider; 204—strengthening rod; 206—driving motor;

[0054] 301—second rack; 302—locking claw; 303—elastic member; 304—torsion spring; 305—second pivot; 306—first pivot; 307—first limiting portion; 308—second limiting portion; 309—mounting bolt; 310—safety belt; 311—convex tooth; 312—tooth groove; 313—second tooth surface; 314—first tooth surface; 315—tightening surface. DETAILED DESCRIPTION

[0055] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0056] See Figure 1The present invention provides a car seat with a height adjustment function. The seat cushion assembly of the car seat is height-adjustable. Specifically, the height adjustment of the seat cushion assembly is achieved by providing a height-adjustable motor and a first rack, which has the advantages of reducing costs and the weight of the seat frame. Furthermore, a collision lock mechanism is provided at the seat cushion assembly. In the event of a collision, regardless of whether the seat cushion assembly is in a high position or a low position, the collision lock mechanism can lock the relative position between the seat cushion wall panel and the slide rail assembly. On the one hand, it ensures collision safety. On the other hand, it also shares the load of the rear connecting rod and the front connecting rod, which can reduce the strength and number of the mechanism components, thereby reducing the weight and cost of the seat frame. The following is an explanation of the car seat with a height adjustment function of the present invention in conjunction with the accompanying drawings.

[0057] See Figure 1 , shows a three-dimensional structural diagram of the seat cushion assembly and the slide rail assembly of the automobile seat with height adjustment function of the present invention. Figure 2 , shows the exploded structural diagram of the rear structure of the seat cushion assembly of the utility model with the height adjustment function. Figure 1 and Figure 2 , the car seat with height adjustment function of the present invention is described.

[0058] like Figure 1 and Figure 2 As shown, the height-adjustable car seat of the present invention includes a seat cushion assembly 110 and a slide rail assembly 107. The seat cushion assembly 110 is mounted on the vehicle floor via the slide rail assembly 107. The slide rail assembly 107 provides a sliding adjustment function for the seat cushion assembly 110, thereby achieving fore-aft position adjustment of the seat. The car seat of the present invention also includes a backrest assembly (not shown), which is hinged to the rear end of the seat cushion assembly 110 and provides a support function for the occupant.

[0059] The seat cushion assembly 110 of the present invention includes a seat cushion wall panel 109, and the car seat also includes a rear connecting rod 102, a first rack 105, a high-adjustment motor 106, a front connecting rod assembly and a collision lock mechanism, wherein the first end of the rear connecting rod 102 is hingedly connected to the rear of the seat cushion wall panel 109, and the second end of the rear connecting rod 102 is hingedly connected to the slide rail assembly 107. The first end of the rear connecting rod 102 can be rotated and adjusted around the hinge of the second end, thereby achieving the purpose of raising the rear of the seat cushion wall panel 109 to a high position, or resetting the rear of the seat cushion wall panel 109 from a high position to a low position to a low position. The first end of the first rack 105 is hinged to the corresponding rear link 102, and the high-adjustment motor 106 is provided on the slide rail assembly 107. The high-adjustment motor 106 is connected to the first rack 105 and can drive the first rack 105 to move and then drive the rear link 102 to rotate to adjust the height of the rear part of the seat cushion wall panel 109. The first end of the front link assembly is hinged to the front part of the seat cushion wall panel 109, and the second end of the front link assembly is hinged to the slide rail assembly 107. Figures 10 to 13 As shown, when the height adjustment motor 106 and the first rack 105 drive the rear link 102 to rotate and adjust, the front link assembly will also adaptively rotate and adjust, achieving height adjustment of the seat cushion assembly. A collision lock mechanism is provided on the corresponding seat cushion wall panel 109 and the slide rail assembly 108. Under the action of a collision load, this collision lock mechanism can lock the relative position between the seat cushion wall panel 109 and the slide rail assembly 107, preventing the seat cushion wall panel 109 from moving closer to the slide rail assembly 108 under the action of the collision load.

[0060] In a specific embodiment of the present invention, Figure 2 and Figure 3 As shown, one first rack 105 and one high-profile motor 106 are provided, and the first rack 105 and the high-profile motor 106 are provided on one side of the car seat; one collision lock mechanism is also provided, and the collision lock mechanism is provided on the other side of the car seat.

[0061] Providing a single high-profile motor 106 and a first rack 105 to drive the rotation of the rear connecting rod 102 can reduce the number of drive mechanisms on the car seat, thereby reducing the weight of the car seat and reducing costs.

[0062] Furthermore, if Figure 2 、 Figure 3 、 Figure 11 and Figure 13 As shown, the high-adjustment motor 106 is provided with a driving gear 111 meshing with the first rack 105 and a limiting member 112 contacting the other side of the first rack 105. The limiting member 112 limits the first rack 105 so that the first rack 105 remains in meshing state with the driving gear 111.

[0063] The first rack 105 is clamped between the limit member 112 and the driving gear 111. When the high-adjustment motor 106 drives the driving gear 111 to rotate, the rotation of the driving gear 111 can drive the first rack 105 to move laterally. The first rack 105 can pull the rear connecting rod 102 to rotate and lift it up or push the rear connecting rod 102 to rotate and fall back through the lateral movement. Accordingly, the height of the rear part of the seat cushion wall panel 109 can be adjusted up or down.

[0064] Preferably, the first end of the first rack 105 is hingedly connected to the middle portion of the rear link 102. The second end of the first rack 105 is a free end.

[0065] Furthermore, the limiting member 112 may be a limiting pin or a freely rotatable limiting wheel.

[0066] In a specific embodiment of the present invention, Figure 2 As shown, there are two rear connecting rods 102 , and a rear tube 101 is fixedly connected between the two rear connecting rods 102 . The rear connecting rod 102 is hinged to the rear of the corresponding seat cushion wall panel 109 through the rear tube 101 .

[0067] There are also two seat cushion wall panels 109 , and hinge holes are provided on the two seat cushion wall panels 109 corresponding to the ends of the rear tube 101 , and the ends of the rear tube 102 are rotatably installed in the corresponding hinge holes.

[0068] In a specific embodiment of the present invention, Figure 1 and Figure 2 As shown, the front link assembly includes a front link 104 and a zero-gravity link 201. One end of the zero-gravity link 201 is hinged to the front of the seat cushion wall 109, and the other end is hinged to the drive mechanism. One end of the front link 104 is hinged to the zero-gravity link 201, and the front link 104 is hinged to the seat cushion wall 109 through the zero-gravity link 201. The zero-gravity link 201 and the drive mechanism can realize the front lift adjustment of the seat cushion assembly 110 and achieve the zero-gravity position adjustment of the car seat.

[0069] Specifically, the driving mechanism can drive the zero-gravity link 201 to rotate, and then the zero-gravity link 201 lifts the front part of the seat cushion wall panel 109 upward. When the front part of the seat cushion wall panel 109 is lifted to a high position, the car seat is in a zero-gravity position. Combined with the position of the rear link 102, the car seat has a high zero-gravity position and a low zero-gravity position.

[0070] Furthermore, the drive mechanism includes a drive screw 202, a drive motor 206, and a drive slider 203. One end of the drive screw 202 is hinged to the seat cushion wall panel 109. The drive motor 206 drives the drive screw 202, driving it to rotate. The drive slider 203 is threaded onto the drive screw 202 and hingedly connected to the corresponding end of the zero-gravity link 201. Furthermore, a reinforcement rod 204 is connected between the two drive sliders 203.

[0071] In another embodiment, the front connecting rod assembly is a connecting rod, such as the front connecting rod 104. One end of the connecting rod is hingedly connected to the front portion of the seat cushion wall plate 109, and the other end is hingedly connected to the slide rail assembly 107.

[0072] In a specific embodiment of the present invention, Figures 2 to 5 As shown, the collision lock mechanism includes a second rack 301 and a locking claw 302 arranged opposite to each other, one of the second rack 301 and the locking claw 302 is arranged on the slide rail assembly 107, and the other of the second rack 301 and the locking claw 302 is arranged on the seat cushion wall panel 109 or the rear connecting rod 102; or the second rack is arranged on the rear connecting rod 102, and the locking claw is arranged on the seat cushion wall panel 109; under the action of the collision load, the locking claw 302 can be clamped with the second rack 301 to achieve locking.

[0073] In a preferred embodiment, the second rack is fixedly connected to the slide rail assembly 107, and the locking claw is connected to the rear link 102. The locking claw can move toward the second rack under the action of the collision load and then be clamped with the second rack.

[0074] In a specific embodiment, there is initially a gap between the second rack and the locking pawl. When a collision occurs, the rear link 102 deforms and drives the locking pawl connected thereto to move toward the second rack, so that the locking pawl engages with the second rack to achieve locking.

[0075] In another specific embodiment, a gap is initially left between the second rack and the locking pawl. When a collision occurs, the collision triggers a driving device, such as a device propelled by an explosion, or an elastically retractable device, which uses the driving device to push the locking pawl toward the second rack, so that the locking pawl engages with the second rack to achieve locking.

[0076] In another preferred embodiment, the second rack is rotatably connected to the slide rail assembly 107, and a locking pawl is provided on the rear link 102. The locking pawl rotates with the rear link 102. Initially, there is a gap between the second rack and the locking pawl. Under the action of a collision load, the second rack and the locking pawl rotate toward each other and engage. Preferably, the locking pawl is integrally formed with the rear link.

[0077] In another preferred embodiment, the second rack is mounted on the rear link 102, and the locking pawl is rotatably mounted on the seat cushion wall 109. The locking pawl is connected to the seat belt. Initially, there is a gap between the second rack and the locking pawl. A collision load acts on the locking pawl through the seat belt, causing the locking pawl to rotate toward the second rack and engage the second rack. Preferably, the second rack and the rear link 102 are integrally formed.

[0078] In another preferred embodiment, the second rack 301 is rotatably connected to the slide rail assembly 107; the locking claw 302 is rotatably provided on the seat cushion wall panel 109, and the locking claw 302 is connected to the safety belt 310. The collision load acts on the locking claw 302 through the safety belt 310, causing the locking claw 302 to rotate toward the second rack 301 and then clamped with the second rack.

[0079] Furthermore, the middle portion of the locking claw 302 is rotatably connected to the seat cushion wall plate 109; the seat cushion wall plate 109 is provided with a first limiting portion 307 supporting the corresponding portion of the second rack 301, a second limiting portion 308 located above the second end of the locking claw 302, and an elastic member 303 in contact with the first end of the locking claw 302; the elastic member 303 applies an elastic force to the first end of the locking claw 302, so that the second end of the locking claw 302 abuts against the second limiting portion 308 and moves away from the second rack 301; combined with Figure 6 and Figure 7 As shown, the first end of the locking claw 302 is connected to the safety belt 310, and the collision load acts on the first end of the locking claw 302 through the safety belt 310, so that the second end of the locking claw 302 can be away from the second limiting pin 308 and then clamped with the second rack 301 to achieve locking.

[0080] The collision lock mechanism allows the locking claw 302 to be away from the second rack 301 under normal conditions through the setting of the elastic member 303, so that the height adjustment function of the seat cushion wall panel 109 is not restricted. When a collision occurs, the collision load acts on the locking claw 302, causing the 302 to rotate to engage with the second rack 301, locking the relative position between the seat cushion wall panel 109 and the slide rail assembly 107, thereby limiting the height adjustment function of the seat cushion wall panel 109.

[0081] Furthermore, if Figure 2 and Figure 5 As shown, one end of the second rack 301 is hinged to the slide rail assembly 107 through the first pivot 306, and the other end of the second rack 301 is a free end. In order to adapt to the height adjustment function of the car seat, the corresponding part of the second rack 301 is placed on the first limit part 307 connected to the seat wall plate 109, combined with Figure 8As shown, when the seat cushion wall panel 109 is adjusted to a high position, the first limiting portion 307 still supports the corresponding portion of the second rack 301. During the process of raising the seat cushion wall panel 109, the free end of the second rack 301 is rotated and adjusted relative to the first pivot 306 due to the support of the first limiting portion 308, thereby maintaining the distance between the second rack 301 and the locking claw 302, ensuring that the locking function of the collision lock mechanism is effective.

[0082] Furthermore, a torsion spring 304 is provided on the first pivot 306 , one end of the torsion spring 304 is connected to the slide rail assembly 107 , and the other end is connected to the second rack 301 . The torsion spring 304 applies elastic force to the second rack 301 so that the second rack 301 is always in contact with the first limiting portion 307 .

[0083] Furthermore, the middle portion of the locking claw 302 is rotatably mounted on the seat cushion wall plate 109 via a second pivot 305 , and a first end of the locking claw 302 is connected to a mounting bolt 309 , which is used to connect to the buckle of the safety belt.

[0084] The elastic member 303 is preferably a coil spring, the free end of which can press the first end of the locking claw 302 , and the fixed end of which is mounted on the seat cushion wall panel 109 .

[0085] Furthermore, the first limiting portion 308 and the second limiting portion 309 are preferably limiting structures such as limiting pins, limiting rods or limiting plates.

[0086] like Figure 7 As shown, when the second rack 301 and the locking pawl 302 are clamped together, the reaction force exerted by the second rack 301 on the locking pawl 302 can cause the second end of the locking pawl 302 to rotate around its rotation center toward the second rack 301, thereby maintaining the locked state.

[0087] The load force applied by the collision load to the locking pawl 302 can cause the second end portion of the locking pawl 302 to rotate around its rotation center toward the second rack 301 , thereby maintaining the locked state.

[0088] from Figure 7 From the perspective of FIG, the rotation center of the locking pawl 302 is the center of the second pivot in the middle. The direction of the reaction force of the second rack 301 on the locking pawl 302 is the direction of the arrow perpendicular to the corresponding convex tooth on the second rack 301 in the figure. Under the action of this reaction force, the second end of the locking pawl 302 tends to rotate clockwise around the second pivot. Under this rotation trend, the locking pawl 302 can bite the second rack 301, thereby achieving a self-locking effect.

[0089] The direction of the arrow on the safety belt 310 is the direction of action of the collision load. Under the action of this collision load, the second end of the locking claw 302 tends to rotate clockwise around the second pivot. Under this rotation trend, the locking claw 302 can bite the second rack 301, thereby achieving a self-locking effect.

[0090] The rotation center of the locking pawl 302, the normal direction of the protruding teeth on the second rack 301 and the arrangement of the seat belt fixing points ensure that the locking pawl 302 and the second rack 301 are automatically locked during a collision.

[0091] Furthermore, if Figure 6 As shown, the second rack 301 is provided with a plurality of protruding teeth 311 ; the second end of the locking pawl 302 is provided with a matching tooth groove 312 corresponding to the protruding teeth 311 , and the tooth groove 312 can mesh with the corresponding protruding teeth 311 .

[0092] Furthermore, the convex tooth 311 has a first tooth surface 314 and a second tooth surface 313 connected to each other; the tooth groove 312 has a first groove wall and a second groove wall connected to each other; when the second rack 301 and the locking claw 302 are clamped, the first groove wall contacts the corresponding first tooth surface 313, and the force along the normal direction of the first tooth surface 313 can cause the second end of the locking claw 302 to rotate around its rotation center toward the second rack 301, thereby maintaining the locked state.

[0093] The first tooth surface 314 of each convex tooth 311 on the second rack 301 is arranged in different directions. The design rule of the first tooth surface 314 is that the normal direction of the first tooth surface 314 can provide a self-locking effect for the locking pawl 302. The second tooth surface 314 of each convex tooth 311 is an inclined surface.

[0094] A pressing surface 315 is formed at the second end portion of the locking pawl 302 . When the first groove wall contacts the corresponding first tooth surface 314 , the pressing surface 315 also contacts the corresponding first tooth surface 314 .

[0095] like Figure 7 As shown, when the locking claw 302 is clamped with the second rack 301, the collision load pulls the first end of the locking claw 302 through the safety belt 310, so that the first groove wall of the locking claw 302 abuts against the corresponding first tooth surface 314, and the pressing surface 315 abuts against another adjacent first tooth surface 314, so that the two first tooth surfaces 314 can exert pressure on the locking claw 302. Figure 7 The reaction force is in the direction indicated by the arrow.

[0096] like Figure 6 and Figure 7As shown, the seat cushion wall panel 109 is in a low position. After the safety belt 310 is subjected to a collision load, it pulls the locking claw 302 to rotate so that the locking claw 302 engages with the second rack 301 to achieve locking.

[0097] like Figure 8 and Figure 9 As shown, the seat cushion wall panel 109 is in a high position. After the safety belt 310 is subjected to a collision load, it pulls the locking claw 302 to rotate so that the locking claw 302 engages with the second rack 301 to achieve locking.

[0098] like Figure 4 and Figure 5 As shown, the locking claw 302, elastic member 303, and second limiting pin 308 are disposed on the outside of the seat cushion wall panel 109. A reinforcing plate 103 is connected to the outside of the seat cushion wall panel 109. The reinforcing plate 103 covers the locking claw 302, elastic member 303, and second limiting pin 308, concealing them and effectively protecting them. An opening is provided on the reinforcing plate 103 corresponding to the mounting bolt 309, through which the mounting bolt 309 extends to facilitate connection to the seat belt buckle.

[0099] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. A person skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. A car seat with a height adjustment function, comprising a seat cushion wall panel (109) and a slide rail assembly (107), characterized in that: The car seat further comprises: a rear connecting rod (102), wherein a first end of the rear connecting rod (102) is hingedly connected to the rear portion of the seat cushion wall panel (109), and a second end of the rear connecting rod (102) is hingedly connected to the slide rail assembly (107); a first rack (105), wherein a first end of the first rack (105) is hingedly connected to a corresponding rear link (102); A high-adjustment motor (106), the high-adjustment motor (106) is arranged on the slide rail assembly (107), the high-adjustment motor (106) is drivingly connected to the first rack (105), and can drive the first rack (105) to move and thereby drive the rear connecting rod (102) to rotate to adjust the height of the seat cushion wall panel (109); A front connecting rod assembly, wherein a first end of the front connecting rod assembly is hingedly connected to the front portion of the seat cushion wall panel (109), and a second end of the front connecting rod assembly is hingedly connected to the slide rail assembly (107); A collision lock mechanism is provided on the corresponding seat cushion wall panel (109) and the slide rail assembly (107). Under the action of a collision load, the collision lock mechanism can lock the relative position between the seat cushion wall panel (109) and the slide rail assembly (107).

2. The car seat with height adjustment function according to claim 1, characterized in that: The collision lock mechanism includes a second rack and a locking claw arranged opposite to each other; One of the second rack and the locking pawl is provided on the slide rail assembly; the other of the second rack and the locking pawl is provided on the seat cushion wall panel or the rear connecting rod; or the second rack is provided on the rear connecting rod and the locking pawl is provided on the seat cushion wall panel; Under the action of a collision load, the locking pawl can be clamped with the second rack to achieve locking.

3. The car seat with height adjustment function according to claim 2, characterized in that: The second rack is fixedly connected to the slide rail assembly; The locking claw is connected to the rear connecting rod; The locking pawl can move toward the second rack under the action of a collision load and then be clamped with the second rack.

4. The car seat with height adjustment function according to claim 2, wherein: The second rack is rotatably connected to the slide rail assembly; The locking claw is provided on the rear connecting rod; The locking pawl can rotate along with the rear connecting rod. Under the action of a collision load, the second rack and the locking pawl can rotate toward each other and then be clamped.

5. The car seat with height adjustment function according to claim 2, characterized in that: The second rack (301) is rotatably connected to the slide rail assembly (107) or the second rack is provided on the rear connecting rod; The locking claw (302) is rotatably arranged on the seat cushion wall plate (109); The locking claw (302) is connected to the safety belt (310), and the collision load acts on the locking claw (302) through the safety belt (310), so that the locking claw (302) rotates toward the second rack (301) and is then clamped with the second rack (301).

6. The car seat with height adjustment function according to claim 5, characterized in that: The middle portion of the locking claw (302) is rotatably connected to the seat cushion wall plate (109); The cushion wall plate (109) is provided with a first limiting portion (307) supporting the second rack (301), a second limiting portion (309) located above the second end of the locking claw (302), and an elastic member (303) in contact with the first end of the locking claw (302); The elastic member (303) applies elastic force to the first end of the locking claw (302), so that the second end of the locking claw (302) abuts against the second limiting portion (308) and moves away from the second rack (301).

7. The car seat with height adjustment function according to claim 5, characterized in that: When the second rack (301) is clamped with the locking claw (302), the reaction force exerted by the second rack (301) on the locking claw (302) can cause the second end of the locking claw (302) to rotate around its rotation center toward the second rack (301), thereby maintaining the locked state.

8. The car seat with height adjustment function according to claim 5, characterized in that: The second rack (301) is provided with a plurality of protruding teeth (311); The second end of the locking claw (301) is provided with a matching tooth groove (312) corresponding to the convex tooth (311), and the tooth groove (312) can be engaged with the corresponding convex tooth (311).

9. The car seat with height adjustment function according to claim 8, characterized in that: The convex tooth (311) has a first tooth surface (314) and a second tooth surface (313) connected to each other; The tooth groove (312) has a first groove wall and a second groove wall connected to each other; When the second rack (301) is clamped with the locking claw (302), the first groove wall contacts the corresponding first tooth surface (314), and the force along the normal direction of the first tooth surface (314) can cause the second end of the locking claw (302) to rotate around its rotation center toward the direction of the second rack (301), thereby maintaining the locked state.

10. The car seat with height adjustment function according to claim 1, wherein: The high-adjustment motor (106) is provided with a driving gear (111) meshed with the first rack (105) and a limiting member (112) in contact with the other side of the first rack (105); the limiting member (112) limits the first rack (105) so that the first rack (105) and the driving gear (111) remain in a meshing state.

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