Multifunctional automobile seat

Abstract

The invention relates to the field of automobile seats, in particular to a multifunctional automobile seat. The seat comprises a seat cushion, a forward backrest and a reverse backrest, the forward backrest is connected with the seat cushion through a first connecting arm and an adjuster, the reverse backrest is connected with the seat cushion through a second connecting arm and an angle adjuster, the angle between the first connecting arm and the seat cushion can be adjusted, the angle between the forward backrest and the first connecting arm can be adjusted, and the angle between the second connecting arm and the seat cushion can be adjusted. And the angle between the reverse backrest and the second connecting arm can be adjusted. According to the invention, a use mode suitable for a corresponding scene can be converted under various different use scenes, so that the use performance is greatly improved; meanwhile, by improving the structure of the worm gear and the worm and additionally arranging the auxiliary bearing assembly, the impact load resistance is improved, the meshing part of the worm gear and the worm can be adjusted and replaced, the service life of the angle adjuster is prolonged, the use experience of the seat is improved, and the service life of the seat is prolonged.

Description

Technical Field

[0001] The invention relates to the field of automobile seats, and in particular to a multifunctional automobile seat. Background Art

[0002] With the rapid development of the automobile industry, the driving and riding requirements of drivers and passengers have gradually increased and diversified. In order to meet the needs of drivers and passengers, the functions of car seats have gradually expanded, and multifunctional seats have emerged. Most of the multifunctional seats in the related art use a recliner to adjust the backrest angle, so that the seat can meet the needs of different scenarios. However, the backrest adjustment angle is limited, which makes the deformation ability of the car seat insufficient, the use is not flexible enough, and the applicable scenarios are still relatively few. At the same time, based on the recliner to maintain the shape of the seat, when the seat is subjected to an impact load, it is easy to cause the transmission locking part inside the recliner to be damaged. Moreover, during the long-term use of the seat, under the influence of static load, the transmission locking part inside the recliner will be locally worn, affecting the service life of the recliner, and then affecting the user experience and service life of the seat.

[0003] The information disclosed in the background technology section of the present invention is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0004] In view of the deficiencies of the prior art, one object of the present invention is to provide a multifunctional car seat to solve the problem that the existing car seats have insufficient deformation capabilities and limited applicable scenarios.

[0005] Another object of the present invention is to increase the service life of the recliner on the seat, thereby improving the user experience and service life of the seat.

[0006] A multifunctional automobile seat of the present invention adopts the following technical scheme: comprising a seat cushion, a forward backrest and a reverse backrest, wherein the seat cushion is horizontally arranged on the bottom plate of the trunk of the automobile; the forward backrest is independent from the seat cushion and both sides thereof are connected to the seat cushion through a first connecting arm, one end of the first connecting arm is hinged to the rear end of the seat cushion and the other end is hinged to the upper end of the forward backrest; the reverse backrest is independent from the seat cushion and both sides thereof are connected to the seat cushion through a second connecting arm, one end of the second connecting arm is hinged to the front end of the seat cushion and the other end is hinged to the upper end of the reverse backrest;

[0007] The connection between the first connecting arm and the seat cushion and the forward backrest is provided with an angle adjuster, the angle adjuster between the first connecting arm and the seat cushion is used to adjust the angle between the first connecting arm and the seat cushion, and the angle adjuster between the first connecting arm and the forward backrest is used to adjust the angle between the first connecting arm and the forward backrest;

[0008] The connection between the second connecting arm and the seat cushion and the reverse backrest is provided with an angle adjuster. The angle adjuster at the second connecting arm and the seat cushion is used to adjust the angle between the second connecting arm and the seat cushion, and the angle adjuster at the second connecting arm and the reverse backrest is used to adjust the angle between the second connecting arm and the reverse backrest.

[0009] Optionally, the multifunctional car seat includes at least: a normal sitting mode, a rear desk mode and a front desk mode.

[0010] Optionally, the multifunctional car seat also includes at least: a bed mode, a camping mode, a sea-viewing mode, and a zero-gravity bed mode.

[0011] Optionally, the multifunctional car seat further includes at least: a folding storage mode, a luggage retrieval mode and a U-shaped mode.

[0012] Optionally, the angle adjuster comprises:

[0013] A housing, arranged on the first connecting arm or the second connecting arm;

[0014] A driving shaft, which is arranged inside the housing and can rotate around its own axis;

[0015] A worm gear is coaxially sleeved on the outside of the driving shaft and is helically connected to the driving shaft;

[0016] The worm gear comprises an outer gear, an inner gear and a meshing wheel arranged inside a housing, the inner gear and the meshing wheel are coaxially fixedly connected, the outer gear is sleeved outside the inner gear, the outer gear has a first position and a second position in the axial direction thereof, when the outer gear is in the first position, it meshes with the screw sleeve and can drive the inner gear to rotate synchronously; when the outer gear is in the second position, it is disengaged from the screw sleeve and rotates relative to the inner gear;

[0017] A transmission wheel meshed with the meshing wheel, an articulated shaft is arranged between the first connecting arm and the seat cushion and the forward backrest, and between the second connecting arm and the seat cushion and the reverse backrest, and the transmission wheel is connected with the corresponding articulated shaft;

[0018] A main motor is configured to drive the driving shaft to rotate;

[0019] Motor 1, configured to drive the screw sleeve to rotate and capable of moving synchronously with the screw sleeve;

[0020] Motor 2 is configured to drive the external gear to rotate when the external gear is in the second position and can move synchronously with the external gear;

[0021] The telescopic cylinder 1 is configured to switch the external gear between a first position and a second position.

[0022] Optionally, the rotation of the external gear and the rotation of the worm have the following proportional relationship:

[0023] Setting: The number of teeth of the external gear is A;

[0024] The number of turns of the thread on the worm that matches the external gear is B;

[0025] When the external gear is in the second position, the external gear rotates one tooth and the worm rotates The pitch of the worm and the external gear is the same as the pitch of the worm and the driving shaft.

[0026] Optionally, the worm includes an intermediate sleeve and a screw sleeve, the intermediate sleeve is sleeved on the driving shaft and spirally connected to the driving shaft, the screw sleeve is coaxially sleeved on the outside of the intermediate sleeve, the screw sleeve and the intermediate sleeve are circumferentially fixed and can slide axially along the intermediate sleeve, both ends of the intermediate sleeve can form a stop fit with the screw sleeve, and an elastic part is arranged between the screw sleeve and the intermediate sleeve, and the elastic part makes the screw sleeve and the intermediate sleeve tend to move away from each other.

[0027] Optionally, the multifunctional car seat further comprises an auxiliary bearing assembly, the auxiliary bearing assembly comprises a control plate, a bayonet and a sliding block, the sliding block is arranged on the housing and can slide along the circumferential direction of the external gear, both ends of the sliding block are provided with elastic sheets, and one end of the elastic sheet away from the sliding block abuts against the housing;

[0028] The bayonet pin is inserted into the sliding block by sliding along the axial direction of the external gear, the bayonet pin corresponds to the tooth groove of the external gear, a return spring is arranged between the bayonet pin and the sliding block, and the return spring makes the bayonet pin disengage from the external gear in the initial state;

[0029] A control panel is arranged on the shell, and the control panel is configured to enable the bayonet to move toward the direction close to the external gear and insert into the tooth groove of the external gear when the forward backrest and the reverse backrest are subjected to impact load; sensors are arranged in the forward backrest and the reverse backrest, and the sensors are configured to sense the impact loads applied to the forward backrest and the reverse backrest.

[0030] Optionally, there are multiple bayonet pins, and the multiple bayonet pins correspond to the tooth grooves of the external gear one by one, and the control disk can be rotatably arranged on the shell; the end face of the control disk close to the bayonet pin includes a top pressure surface, a reset surface and two transition inclined surfaces, the top pressure surface is closer to the bayonet pin in the axial direction of the external gear than the reset surface, the transition inclined surface connects the top pressure surface and the reset surface, when the top pressure surface contacts the bayonet pin, the bayonet pin extends into the slot of the external gear, and the rotation angle of the control disk is positively correlated with the magnitude of the impact load; an auxiliary motor is also provided on the shell, and the auxiliary motor is configured to drive the control disk to rotate; a telescopic cylinder 2 is provided on the sliding block, and the telescopic cylinder 2 is configured to press the control disk tightly, so that the control disk and the sliding block rotate synchronously.

[0031] Optionally, a guide rail extending forward and backward is arranged on the bottom plate of the automobile, and the seat cushion is slidably arranged on the guide rail and can be locked relative to the guide rail.

[0032] The beneficial effects of the present invention are as follows: the forward backrest and the reverse backrest in a multifunctional automobile seat of the present invention are independent of the seat cushion, and the top end of the forward backrest is hingedly connected to the rear end of the seat cushion by a first connecting arm, and the top end of the reverse backrest is connected to the front end of the seat cushion by a second connecting arm, and angle adjusters are arranged at the connections, so that the angle between the first connecting arm and the seat cushion can be adjusted, the angle between the forward backrest and the first connecting arm can be adjusted, the angle between the second connecting arm and the seat cushion can be adjusted, and the angle between the reverse backrest and the second connecting arm can be adjusted. In this way, the automobile seat of the present invention has at least a normal sitting mode, a folding storage mode, a bed mode, a zero-gravity bed mode, a sea-viewing mode, a camping mode, a rear desk mode, a luggage retrieval mode, a U-shaped mode and a front desk mode, with more deformation modes and a wider range of applicable scenarios, especially the rear desk mode and the front desk mode. The transformation of the seat shape is used to meet the office work needs that cannot be met by existing cars, and the usage performance is greatly improved.

[0033] Furthermore, the angle adjuster used in the present invention improves the worm to be spirally connected to the driving shaft, and changes the worm wheel to include an external gear, an internal gear and a meshing wheel. The meshing and disengagement of the external gear and the worm, as well as the connection and disengagement of the external gear and the internal gear are achieved by switching the position of the external gear, so that the meshing parts of the worm wheel and the worm can be adjusted and replaced, so that the wear of the worm wheel and the worm is relatively uniform, reducing the local wear of the worm wheel and the worm under long-term static load, and extending the service life of the angle adjuster.

[0034] Furthermore, the recliner used in the present invention improves the worm to include an intermediate sleeve and a screw sleeve that are socketed with each other, and the intermediate sleeve and the screw sleeve can slide axially with an elastic member connected therebetween. When the seat is subjected to an impact load, the elastic member can provide a buffer to improve the impact resistance of the recliner, thereby further extending the service life of the recliner.

[0035] Furthermore, through the provision of an auxiliary load-bearing component, when the seat is subjected to an impact load, the impact load can be borne and buffered, further improving the impact resistance of the angle adjuster in the present invention. At the same time, the auxiliary load-bearing component can adaptively adjust the load-bearing and buffering capacity according to the size of the impact load, making it more flexible to use and more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1A state diagram of a multifunctional automobile seat in a normal sitting posture mode of the present invention;

[0038] Figure 2 A state diagram of a multifunctional automobile seat in a folding storage mode according to the present invention;

[0039] Figure 3 A state diagram of a multifunctional automobile seat in bed mode according to the present invention;

[0040] Figure 4 A state diagram of a multifunctional automobile seat in a zero-gravity bed mode according to the present invention;

[0041] Figure 5 This is a state diagram of a multifunctional car seat in the sea-viewing mode of the present invention;

[0042] Figure 6 A state diagram of a multifunctional car seat in a camping mode according to the present invention;

[0043] Figure 7 A state diagram of a multifunctional automobile seat in a rear desk mode of the present invention;

[0044] Figure 8 A state diagram of a multifunctional automobile seat in a luggage picking mode according to the present invention;

[0045] Fig. 9 A state diagram of a multifunctional automobile seat in a U-shaped mode according to the present invention;

[0046] Fig.10 A state diagram of a multifunctional automobile seat in a front desk mode of the present invention;

[0047] Fig.11 It is a structural schematic diagram of the angle adjuster in the present invention;

[0048] Fig.12 is a side view of the angle adjuster of the present invention;

[0049] Fig.13 for Fig.12 Middle AA section view;

[0050] Fig.14 for Fig.13 Enlarged view of point D in the middle;

[0051] Fig.15 It is a front view of the angle adjuster of the present invention;

[0052] Fig.16 for Fig.15 Middle BB section view;

[0053] Fig.17 for Fig.16Enlarged view of point E in the middle;

[0054] Fig.18 for Fig.15 Enlarged image of the middle CC;

[0055] Fig.19 for Fig.18 Enlarged view of point F in the middle;

[0056] Fig. 20 It is a three-dimensional diagram of the angle adjuster in the present invention from another angle.

[0057] In the figure:

[0058] 110, seat cushion; 120, forward backrest; 130, reverse backrest; 140, guide rail;

[0059] 210, first connecting arm; 220, second connecting arm;

[0060] 300, angle adjuster;

[0061] 301, driving shaft; 302, external gear; 303, internal gear; 304, meshing wheel; 305, transmission wheel; 306, motor 1; 307, housing; 308, screw sleeve; 309, intermediate sleeve; 310, elastic member; 311, motor 2; 312, telescopic cylinder 1; 313, telescopic cylinder 2; 314, control panel; 315, bayonet; 316, sliding block; 317, elastic sheet; 318, return spring; 319, main motor. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0063] like Figures 1 to 20 As shown, a multifunctional car seat provided by an embodiment of the present invention can be folded and deformed into various shapes, and is mainly used as the last row seat of a hatchback or a hatchback. It specifically includes a seat cushion 110, a forward backrest 120 and a reverse backrest 130; the seat cushion 110 is horizontally arranged on the bottom plate of the car trunk, and in order to facilitate the adjustment of the front and rear position of the seat cushion 110, a guide rail 140 extending forward and backward is arranged on the bottom plate of the car, and the seat cushion 110 is slidably arranged on the guide rail 140 and can be locked relative to the guide rail 140.

[0064] The forward backrest 120 is independent of the seat cushion 110 and both sides thereof are connected to the seat cushion 110 via a first connecting arm 210, one end of the first connecting arm 210 is hinged to the rear end of the seat cushion 110, and the other end is hinged to the upper end of the forward backrest 120; the reverse backrest 130 is independent of the seat cushion 110 and both sides thereof are connected to the seat cushion 110 via a second connecting arm 220, one end of the second connecting arm 220 is hinged to the front end of the seat cushion 110, and the other end is hinged to the upper end of the reverse backrest 130.

[0065] Recliners 300 are provided at the connections between the first connecting arm 210 and the seat cushion 110 and the forward backrest 120. The recliners 300 at the first connecting arm 210 and the seat cushion 110 are used to adjust the angle between the first connecting arm 210 and the seat cushion 110, and the recliners 300 at the first connecting arm 210 and the forward backrest 120 are used to adjust the angle between the first connecting arm 210 and the forward backrest 120; recliners 300 are provided at the connections between the second connecting arm 220 and the seat cushion 110 and the reverse backrest 130. The recliners 300 at the second connecting arm 220 and the seat cushion 110 are used to adjust the angle between the second connecting arm 220 and the seat cushion 110, and the recliners 300 at the second connecting arm 220 and the reverse backrest 130 are used to adjust the angle between the second connecting arm 220 and the reverse backrest 130.

[0066] Based on the solution of this embodiment, a multifunctional vehicle seat of the present invention at least includes:

[0067] Normal sitting mode, in which the forward backrest 120 is located behind the seat cushion 110 and the top end is tilted backwards to facilitate leaning during normal sitting;

[0068] A folding storage mode, in which the forward backrest 120 is folded above the seat cushion 110 and arranged parallel to the seat cushion 110 to expand the trunk space for storage;

[0069] Bed mode, in which the positive backrest 120 is flattened behind the seat cushion 110 and its bottom end is close to the seat cushion 110, which is convenient for lying down and resting;

[0070] Zero-gravity bed mode, in which the forward backrest 120 and the reverse backrest 130 are both arranged at an angle to the seat cushion 110;

[0071] In the sea-viewing mode, the forward backrest 120 is flattened backwards, and the reverse backrest 130 is arranged at an angle with the seat cushion 110, so as to facilitate leaning when lying down;

[0072] Camping mode, in which the forward backrest 120 is flattened behind the seat cushion 110 and its bottom end is away from the seat cushion 110 (that is, the bottom end of the forward backrest 120 is flipped backward and overhangs outside the vehicle), so as to facilitate outdoor camping;

[0073] Rear desk mode, in which the forward backrest 120 is horizontally suspended to the rear upper part of the seat cushion 110 to form a rear desk, and the reverse backrest 130 is arranged at an angle with the seat cushion 110 to facilitate leaning, and because there is usually a sinking space for storing spare tires and other items under the bottom plate of the trunk, the bottom plate at this position can be opened to place the legs in the sinking space to form a comfortable office station;

[0074] Luggage taking mode, in which the bottom of the forward backrest 120 is flipped backward to form an angle with the first connecting arm 210, so as to facilitate taking items from the trunk through the space between the two first connecting arms 210 in the vehicle;

[0075] U-shaped mode, in which the forward backrest 120 and the reverse backrest 130 are arranged at an angle with the seat cushion 110 to form a U-shaped space. When storing items in the U-shaped space, the items can be blocked to prevent them from sliding down during emergency braking;

[0076] Front desk mode, in which the reverse backrest 130 is horizontally suspended above the front of the seat cushion 110 to form a front desk, and the forward backrest 120 is arranged at an angle with the seat cushion 110 to facilitate leaning.

[0077] The present invention can be transformed into a usage mode suitable for a variety of different usage scenarios through the arrangement of the seat cushion 110, the forward backrest 120, the reverse backrest 130, the first connecting arm 210, the second connecting arm 220 and the angle adjuster 300, especially the rear desk mode and the front desk mode. The change of the seat shape meets the office work needs that cannot be met by existing cars, and greatly improves the usage performance.

[0078] In a further embodiment, referring to Figures 11 to 20 , the angle adjuster 300 comprises:

[0079] The housing 307 is disposed on the first connecting arm 210 or the second connecting arm 220;

[0080] A driving shaft 301, which is disposed inside the housing 307 and can rotate around its own axis;

[0081] A worm gear is coaxially sleeved on the outside of the driving shaft 301 and is spirally connected to the driving shaft 301;

[0082] The worm gear includes an outer gear 302, an inner gear 303 and a meshing wheel 304 arranged inside a housing 307. The inner gear 303 and the meshing wheel 304 are coaxially fixedly connected. The outer gear 302 is sleeved outside the inner gear 303. The outer gear 302 has a first position and a second position in the axial direction. When the outer gear 302 is in the first position, it meshes with the screw sleeve 308 and can drive the inner gear 303 to rotate synchronously. When the outer gear 302 is in the second position, it is disengaged from the screw sleeve 308 and rotates relative to the inner gear 303.

[0083] A transmission wheel 305, the transmission wheel 305 meshes with the meshing wheel 304, and hinge shafts are provided between the first connecting arm 210 and the seat cushion 110 and the forward backrest 120, and between the second connecting arm 220 and the seat cushion 110 and the reverse backrest 130, and the transmission wheel 305 is connected to the corresponding hinge shafts;

[0084] A main motor 319 is configured to drive the driving shaft 301 to rotate;

[0085] A motor 1 306 is configured to drive the screw sleeve 308 to rotate and can move synchronously with the screw sleeve 308;

[0086] The second motor 311 is configured to drive the external gear 302 to rotate and move synchronously with the external gear 302 when the external gear 302 is in the second position;

[0087] The telescopic cylinder 1 312 is configured to switch the outer gear 302 between the first position and the second position.

[0088] In one of the embodiments, specifically, the seat cushion 110, the forward backrest 120 and the reverse backrest 130 have support frames inside, the hinge shaft can be fixedly set on the support frames of the seat cushion 110, the forward backrest 120 and the reverse backrest 130, the first connecting arm 210 and the second connecting arm 220 are hinged to the hinge shaft, the shell 307 of the angle adjuster 300 is set to be fixedly connected to the first connecting arm 210 and the second connecting arm 220, and the transmission wheel 305 is detachably fixedly connected to the hinge shaft.

[0089] In the initial state, the outer gear 302 is in the first position. When the state of the multifunctional seat of the present invention needs to be adjusted, the main motor 319 drives the driving shaft 301 to rotate, and the motor 1 306 drives the worm to rotate. The speed of the worm is consistent with the speed of the driving shaft 301. The rotation of the worm drives the outer gear 302 to rotate, the outer gear 302 drives the inner gear 303 to rotate, the inner gear 303 drives the meshing wheel 304 to rotate, the meshing wheel 304 drives the transmission wheel 305 to rotate, and the transmission wheel 305 drives the corresponding hinge shaft to rotate. Specifically, the transmission wheel 305 installed on the angle adjuster 300 of the first connecting arm 210 and the seat cushion 110 drives the first connecting arm 210 to rotate to adjust the angle between the first connecting arm 210 and the seat cushion 110. The transmission wheel 305 on the recliner 300 between the seat 10 and the forward backrest 120 drives the forward backrest 120 to rotate relative to the first connecting arm 210 to adjust the angle of the forward backrest 120 relative to the first connecting arm 210; the transmission wheel 305 on the recliner 300 installed between the second connecting arm 220 and the seat cushion 110 drives the second connecting arm 220 to rotate to adjust the angle between the second connecting arm 220 and the seat cushion 110; the transmission wheel 305 on the recliner 300 installed between the second connecting arm 220 and the reverse backrest 130 drives the reverse backrest 130 to rotate relative to the second connecting arm 220 to adjust the angle of the reverse backrest 130 relative to the second connecting arm 220, thereby achieving the purpose of angle adjustment and changing the use mode of the multifunctional car seat of the present invention.

[0090] It can be understood that in the related art, the car seat whose shape is adjusted based on the recliner 300 is maintained by the recliner 300 regardless of the shape of the car seat, that is, the force from the seat and the load thereon is mostly borne by the worm wheel and the worm, and under a long-term static load state, it will cause local wear of the worm wheel and the worm, affecting the service life of the recliner 300. In the scheme of this embodiment, by improving the structure of the worm wheel and the worm, the meshing parts of the worm wheel and the worm can be adjusted and replaced, so that the wear of the worm wheel and the worm is relatively uniform, and the service life of the recliner 300 is extended. Specifically, after a period of use, the telescopic cylinder 1 312 is used to control the outer gear 302 to switch from the first position to the second position. At this time, the outer gear 302 is disengaged from the worm, and at the same time, the outer gear 302 and the inner gear 303 switch from synchronous rotation to relative rotation; then, the motor 2 311 is started, and the motor 2 311 drives the outer gear 302 to rotate relative to the inner gear 303, changing the position of the outer gear 302 participating in the meshing. At the same time, the motor 1 306 is started, and the motor 1 306 drives the worm to rotate relative to the driving shaft 301. When the worm rotates, it is spirally connected to the driving shaft 301, and then moves relative to the driving shaft 301, changing the position of the worm participating in the meshing, thereby changing the parts of the worm wheel and the worm participating in the meshing; after adjustment, the outer gear 302 is switched from the second state to the first state.

[0091] In a further embodiment, in order to make the wear of the worm wheel and the worm more uniform, when the outer gear 302 is in the second position, the rotation of the outer gear 302 and the rotation of the worm have the following proportional relationship:

[0092] Setting: The number of teeth of the external gear 302 is A;

[0093] The number of turns of the thread on the worm that matches the external gear 302 is B;

[0094] When the outer gear 302 rotates one tooth, the worm will rotate The pitch of the worm gear and the external gear 302 is the same as the pitch of the worm gear and the driving shaft 301.

[0095] In the scheme of this embodiment, the meshing phase of the worm wheel and the worm is adjusted at fixed time intervals to form a cycle, and under the above-mentioned rotation relationship, when the external gear 302 rotates one circle, the worm just moves from one end to the other end, and the worm rotates and moves synchronously, and each section of the thread line on the worm is involved in the meshing, so that the wear of the worm wheel and the worm is as uniform as possible in each phase, further improving the service life.

[0096] In a further embodiment, the worm includes an intermediate sleeve 309 and a screw sleeve 308. The intermediate sleeve 309 is sleeved on the driving shaft 301 and is spirally connected to the driving shaft 301. The screw sleeve 308 is coaxially sleeved on the outside of the intermediate sleeve 309. The screw sleeve 308 and the intermediate sleeve 309 are circumferentially fixed and can slide axially along the intermediate sleeve 309. Specifically, the screw sleeve 308 and the intermediate sleeve 309 can be connected by a spline to achieve synchronous rotation and axial sliding; both ends of the intermediate sleeve 309 can form a stop fit with the screw sleeve 308, and an elastic member 310 is arranged between the screw sleeve 308 and the intermediate sleeve 309. The elastic member 310 makes the screw sleeve 308 and the intermediate sleeve 309 tend to move away from each other; the preferred elastic member 310 of the present invention is a compression spring.

[0097] In the solution of this embodiment, the main motor 319 drives the driving shaft 301 to rotate, and at the same time, the motor 306 drives the screw sleeve 308 to rotate. The rotation speed of the screw sleeve 308 is consistent with the rotation speed of the driving shaft 301. The screw sleeve 308 rotates and drives the outer gear 302 to rotate, the outer gear 302 drives the inner gear 303 to rotate, the inner gear 303 drives the meshing wheel 304 to rotate, the meshing wheel 304 drives the transmission wheel 305 to rotate, and the transmission wheel 305 drives the corresponding hinge shaft to rotate, thereby achieving the purpose of angle adjustment and changing the use mode of the multifunctional car seat of the present invention.

[0098] It can be understood that in the related art, the car seat that adjusts its shape based on the recliner 300 is maintained by the recliner 300 regardless of the shape of the car seat, that is, the force from the seat and the load on it is mostly borne by the worm wheel and the worm. When the car seat is subjected to an impact load, the meshing part of the worm wheel and the worm is affected by the impact load, which can easily cause damage to the meshing locking part. The solution of this embodiment improves the structure of the worm so that the worm wheel and the worm can buffer the impact load, improve the impact resistance of the worm wheel and the worm, and extend the service life of the recliner 300. Specifically, when the seat is subjected to an impact load in a certain state (for example, the person on the seat suddenly exerts force or changes posture due to acceleration or deceleration of the vehicle, or the moment when the person leans against the forward backrest 120 or the reverse backrest 130, etc.), the impact load will be transmitted to the outer gear 302 through the forward backrest 120 or the reverse backrest 130, and the outer gear 302 pushes the screw sleeve 308 to move relative to the middle sleeve 309, and the elastic member 310 is compressed to buffer the impact load, reduce the damage caused by the impact load to the meshing and locking part of the worm wheel and the worm, and extend the service life of the recliner 300. It can be understood that the elastic coefficient of the elastic member 310 is set relatively large and can withstand a certain static load. Therefore, in the normal transformation mode, the elastic member 310 has almost no effect on the transmission of the worm wheel and the worm.

[0099] In a further embodiment, a multifunctional car seat of the present invention further includes an auxiliary load-bearing component, which is configured to bear and buffer impact loads, further improving the impact resistance of the recliner 300 of the present invention and extending the service life of the recliner 300.

[0100] Furthermore, the auxiliary bearing assembly includes a control disk 314, a bayonet 315 and a sliding block 316. The sliding block 316 is disposed on the housing 307 and can slide along the circumferential direction of the outer gear 302. Both ends of the sliding block 316 are provided with elastic sheets 317. One end of the elastic sheet 317 away from the sliding block 316 abuts against the housing 307. The elastic sheet 317 preferably has a broken line shape or a wave shape along the circumferential direction of the outer gear 302.

[0101] The bayonet 315 is inserted into the sliding block 316 by sliding along the axial direction of the outer gear 302. The bayonet 315 corresponds to the tooth groove of the outer gear 302. A return spring 318 is arranged between the bayonet 315 and the sliding block 316. The return spring 318 makes the bayonet 315 tend to move away from the outer gear 302, so that the bayonet 315 is separated from the outer gear 302 in the initial state.

[0102] The control disk 314 is disposed in the housing 307, and the control disk 314 is configured to enable the pin 315 to move toward the direction close to the outer gear 302 and insert into the tooth groove of the outer gear 302 when the forward backrest 120 and the reverse backrest 130 are subjected to impact loads; sensors are disposed in the forward backrest 120 and the reverse backrest 130, and the sensors are configured to sense the impact loads applied to the forward backrest 120 and the reverse backrest 130.

[0103] In the scheme of this embodiment, when the forward backrest 120 and the reverse backrest 130 are subjected to impact loads, the sensors arranged thereon sense the impact loads and send out signals, and the control panel 314 operates to press the bayonet pin 315 into the tooth groove inserted into the outer gear 302. When the load is transmitted to the outer gear 302 through the forward backrest 120 and the reverse backrest 130, the outer gear 302 rotates and drives the sliding block 316 to rotate through the bayonet pin 315. Most of the impact load is first buffered by the elastic sheet 317 at the end of the sliding block 316, and the remaining small part of the load is overcome by the elastic member 310 between the screw sleeve 308 and the intermediate sleeve 309, thereby further improving the impact resistance of the recliner 300.

[0104] In a further embodiment, there are multiple bayonet pins 315, and the multiple bayonet pins 315 correspond to the tooth grooves of the outer gear 302 one by one. When the forward backrest 120 and the reverse backrest 130 are subjected to impact loads, the number of bayonet pins 315 inserted into the slots of the outer gear 302 is positively correlated with the magnitude of the impact load, that is, the greater the impact load, the more bayonet pins 315 inserted into the outer gear 302, the more bayonet pins 315 and the teeth of the outer gear 302 participate in sharing the impact load, and the greater the impact load that the device can withstand. Conversely, the fewer bayonet pins 315 inserted into the outer gear 302, the fewer bayonet pins 315 and the teeth of the outer gear 302 participate in sharing the impact load, and the smaller the impact load that the device can withstand. In this way, according to the magnitude of the impact load, the ability of the device to withstand the impact load is adaptively adjusted, thereby improving the practicality of the device.

[0105] To achieve this function, the control disk 314 is rotatably arranged on the housing 307; the end surface of the control disk 314 close to the pin 315 includes a top pressure surface, a reset surface and two transition inclined surfaces. The top pressure surface is closer to the pin 315 in the axial direction of the external gear 302 than the reset surface. The transition inclined surface connects the top pressure surface and the reset surface. When the top pressure surface contacts the pin 315, the pin 315 extends into the slot of the external gear 302, and the rotation angle of the control disk 314 is positively correlated with the magnitude of the impact load; an auxiliary motor (not shown in the figure) is also provided on the housing 307, and the auxiliary motor is configured to drive the control disk 314 to rotate; a telescopic cylinder 2 313 is provided on the sliding block 316, and the telescopic cylinder 2 313 is configured to press the control disk 314 tightly, so that the control disk 314 and the sliding block 316 rotate synchronously.

[0106] During use, when the forward backrest 120 and the reverse backrest 130 are subjected to impact loads, the sensors arranged thereon sense the impact loads and send out signals, and the auxiliary motor drives the control disk 314 to rotate a corresponding angle according to the magnitude of the impact load. After the control disk 314 rotates, the bayonet pins 315 are pressed into the tooth grooves of the outer gear 302. The greater the load sensed by the sensor, the greater the angle of rotation of the control disk 314, and the more bayonet pins 315 are engaged in the outer gear 302. After the control disk 314 rotates into place, the telescopic cylinder 313 extends upward and It abuts against the control disk 314, so that the sliding block 316 and the control disk 314 can rotate synchronously; when the load is transmitted to the outer gear 302 through the positive backrest 120 and the reverse backrest 130, the outer gear 302 rotates and drives the sliding block 316 and the control disk 314 to rotate through the pin 315, and most of the impact load is first buffered by the elastic sheet 317 at the end of the sliding block 316, and the remaining small part of the load is overcome by the elastic member 310 between the screw sleeve 308 and the middle sleeve 309, thereby further improving the impact resistance of the recliner 300.

[0107] The present invention can change into various modes according to the needs of the use scene through the arrangement of the seat cushion 110, the forward backrest 120, the reverse backrest 130, the first connecting arm 210, the second connecting arm 220 and the recliner 300, and has flexible deformation, diverse functions and strong practicality. At the same time, the recliner 300 used in the present invention can not only resist impact loads, but also change the meshing part of the internal worm gear to avoid wear under long-term static load, greatly improving the service life of the recliner 300, and thus improving the service life of the seat.

[0108] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional car seat, characterized in that: The utility model comprises a seat cushion, a forward backrest and a reverse backrest, wherein the seat cushion is horizontally arranged on the bottom plate of the trunk of the automobile; the forward backrest is independent from the seat cushion and both sides thereof are connected to the seat cushion through a first connecting arm, one end of the first connecting arm is hinged to the rear end of the seat cushion and the other end is hinged to the upper end of the forward backrest; the reverse backrest is independent from the seat cushion and both sides thereof are connected to the seat cushion through a second connecting arm, one end of the second connecting arm is hinged to the front end of the seat cushion and the other end is hinged to the upper end of the reverse backrest; The connection between the first connecting arm and the seat cushion and the forward backrest is provided with an angle adjuster, the angle adjuster between the first connecting arm and the seat cushion is used to adjust the angle between the first connecting arm and the seat cushion, and the angle adjuster between the first connecting arm and the forward backrest is used to adjust the angle between the first connecting arm and the forward backrest; The connection between the second connecting arm and the seat cushion and the reverse backrest is provided with an angle adjuster. The angle adjuster at the second connecting arm and the seat cushion is used to adjust the angle between the second connecting arm and the seat cushion, and the angle adjuster at the second connecting arm and the reverse backrest is used to adjust the angle between the second connecting arm and the reverse backrest.

2. A multifunctional vehicle seat according to claim 1, characterized in that: The multifunctional automobile seat at least includes: a normal sitting mode, a rear desk mode and a front desk mode.

3. A multifunctional vehicle seat according to claim 1, characterized in that: The multifunctional car seat at least includes: a bed mode, a camping mode, a sea-viewing mode, and a zero-gravity bed mode.

4. A multifunctional vehicle seat according to claim 1, characterized in that: The multifunctional car seat at least includes: a folding storage mode, a luggage retrieval mode and a U-shaped mode.

5. The multifunctional vehicle seat according to claim 1, characterized in that: The angle adjuster includes: A housing, arranged on the first connecting arm or the second connecting arm; A driving shaft, which is arranged inside the housing and can rotate around its own axis; A worm gear is coaxially sleeved on the outside of the driving shaft and is helically connected to the driving shaft; The worm gear comprises an outer gear, an inner gear and a meshing wheel arranged inside a housing, the inner gear and the meshing wheel are coaxially fixedly connected, the outer gear is sleeved outside the inner gear, the outer gear has a first position and a second position in the axial direction thereof, when the outer gear is in the first position, it meshes with the screw sleeve and can drive the inner gear to rotate synchronously; when the outer gear is in the second position, it is disengaged from the screw sleeve and rotates relative to the inner gear; A transmission wheel meshed with the meshing wheel, an articulated shaft is arranged between the first connecting arm and the seat cushion and the forward backrest, and between the second connecting arm and the seat cushion and the reverse backrest, and the transmission wheel is connected with the corresponding articulated shaft; A main motor is configured to drive the driving shaft to rotate; Motor 1, configured to drive the screw sleeve to rotate and capable of moving synchronously with the screw sleeve; Motor 2 is configured to drive the external gear to rotate when the external gear is in the second position and can move synchronously with the external gear; The telescopic cylinder 1 is configured to switch the external gear between a first position and a second position.

6. A multifunctional vehicle seat according to claim 5, characterized in that: The rotation of the external gear and the rotation of the worm have the following proportional relationship: Setting: The number of teeth of the external gear is A; The number of turns of the thread on the worm that matches the external gear is B; When the outer gear is in the second position, the outer gear rotates one tooth and the worm rotates The pitch of the worm and the external gear is the same as the pitch of the worm and the driving shaft.

7. The multifunctional vehicle seat according to claim 5, characterized in that: The worm includes an intermediate sleeve and a screw sleeve. The intermediate sleeve is sleeved on the driving shaft and spirally connected to the driving shaft. The screw sleeve is coaxially sleeved on the outside of the intermediate sleeve. The screw sleeve and the intermediate sleeve are circumferentially fixed and can slide axially along the intermediate sleeve. Both ends of the intermediate sleeve can form a stop fit with the screw sleeve. An elastic part is arranged between the screw sleeve and the intermediate sleeve. The elastic part makes the screw sleeve and the intermediate sleeve tend to move away from each other.

8. A multifunctional vehicle seat according to claim 7, characterized in that: The multifunctional car seat further comprises an auxiliary bearing assembly, which comprises a control panel, a latch and a sliding block, wherein the sliding block is arranged on the housing and can slide along the circumferential direction of the outer gear, and elastic sheets are arranged at both ends of the sliding block, and an end of the elastic sheet away from the sliding block abuts against the housing; The bayonet pin is inserted into the sliding block by sliding along the axial direction of the external gear, the bayonet pin corresponds to the tooth groove of the external gear, a return spring is arranged between the bayonet pin and the sliding block, and the return spring makes the bayonet pin disengage from the external gear in the initial state; A control panel is arranged on the shell, and the control panel is configured to enable the bayonet to move toward the direction close to the external gear and insert into the tooth groove of the external gear when the forward backrest and the reverse backrest are subjected to impact load; sensors are arranged in the forward backrest and the reverse backrest, and the sensors are configured to sense the impact loads applied to the forward backrest and the reverse backrest.

9. A multifunctional vehicle seat according to claim 8, characterized in that: There are multiple bayonet pins, and the multiple bayonet pins correspond to the tooth grooves of the external gear one by one. The control disk can be rotatably arranged on the shell; the end face of the control disk close to the bayonet pin includes a top pressure surface, a reset surface and two transition inclined surfaces, the top pressure surface is closer to the bayonet pin in the axial direction of the external gear than the reset surface, the transition inclined surface connects the top pressure surface and the reset surface, when the top pressure surface contacts the bayonet pin, the bayonet pin extends into the slot of the external gear, and the rotation angle of the control disk is positively correlated with the size of the impact load; an auxiliary motor is also arranged on the shell, and the auxiliary motor is configured to drive the control disk to rotate; a telescopic cylinder 2 is arranged on the sliding block, and the telescopic cylinder 2 is configured to press the control disk tightly, so that the control disk and the sliding block rotate synchronously.

10. The multifunctional vehicle seat according to claim 1, characterized in that: A guide rail extending forward and backward is arranged on the bottom plate of the automobile, and the seat cushion is slidably arranged on the guide rail and can be locked relative to the guide rail.

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