CN211765103U - Automobile chair back with soft safety function - Google Patents

Abstract

The utility model provides a car back of chair with soft safety function, includes that skeleton body, headrest supporting beam, angle modulation ware connect crossbeam, back of the chair upper wing board, back of the chair back support, the middle part that back of the chair back supported is encircleed and is formed the shape of hemispherical body towards one side of person of taking, characteristics: still include backbone curvature adjustment mechanism and last backbone joint mechanism, the skeleton body includes backbone and lower backbone, the skeleton body is S-shaped structure, headrest supporting beam establishes at the top of last backbone, the angle modulation ware is connected the crossbeam and is established the bottom at backbone down, the middle part at last backbone is established to the wing plate on the back of the chair, the middle part at backbone is established to the wing plate under the back of the chair, back of the chair back of the body holds in the palm and connects between last backbone and lower backbone, go up backbone curvature adjustment mechanism and connect between the top of backbone and last backbone joint mechanism down, it is connected with the lower extreme of last backbone to go up backbone joint mechanism. The comfortableness of the upper limbs of the driver is improved when the driver sits; the degree of coincidence of the chair back and the physiological radian of the back of the driver is increased; the flexibility and the safety guarantee effect are good.

Description

Automobile chair back with soft safety function

Technical Field

The utility model belongs to the technical field of automobile parts, concretely relates to car back of chair with soft safety function.

Background

The aforementioned automobile seat back mainly refers to a seat back framework of an automobile aviation seat, and typical but not limited examples of the automobile aviation seat are seats on commercial automobiles, cars, various touring vehicles, visitors reception special vehicles, and the like. As is known in the art, in the automotive industry, there are many design factors for automotive seats, particularly for aviation seats, wherein comfort and safety are two crucial factors, the former being aimed at the comfort level of the driver, and the latter being aimed at minimizing the life threat to the driver in extreme situations, such as in the event of an impact. Wherein, whether the chair back structure is reasonable or not determines the comfort and the safety to a great extent. For example, in static and/or dynamic states, if the backrest does not satisfy the requirement of different occupants for adjustment according to needs, the comfort level will be affected accordingly, because the backrest itself cannot be adjusted independently, and the adjustment of the backrest according to needs can only be achieved by the angle adjuster (conventionally called "automobile seat angle adjuster" in the industry, the same applies hereinafter) at the connection point of the backrest and the seat, as for example, in the case of the aforementioned commercial automobile and the touring bus, so that the requirement of different occupants for adaptive adjustment of the backrest according to their own physiological curvature of the back cannot be satisfied. For example, since the frame of the seat back is a rigid frame, specifically, the seat back frame is generally formed in an Jiong-shaped frame structure, a back support (also referred to as a "waist support") is provided at a middle portion in the height direction of the Jiong-shaped frame, and a soft bag is provided outside the frame, when an automobile encounters an unexpected collision accident, the seat back formed in this way does not have a flexible and reasonable deformation amount under a large impact force, and therefore, it is easy to clamp a rider in a small space formed by deformation displacement of the seat back which is immovable and bounced, and there is a fear that the life safety of the rider on the automobile in the accident state is compromised. Traffic accidents that people usually feel in the ears or even witnessed by their passengers being clamped by their abdomen and back (i.e. cramps) and thus are difficult to rescue or even suffocate result substantially from the aforementioned rigid frame of the chair back.

The above technical problems have long been troubled in the industry, and there is no suggestion in the prior art patent and non-patent documents that are disclosed so far that the technical problems are solved, and the technical solutions to be described below are made on this background.

SUMMERY OF THE UTILITY MODEL

The task of the utility model is to provide a help become rigidity skeleton for flexible skeleton body and can promote the travelling comfort of the upper limbs when taking by the passenger, be favorable to different passengers to carry out reasonable regulation alone according to self needs and can promote the degree that the back of the chair is identical with passenger's back physiology radian, be of value to avoid the vehicle to meet under the extreme situation of accident and so on the passenger is pressed from both sides the card and can embody the car back of the chair that has soft safety function of the security that should have.

The task of the utility model is accomplished in this way, a car back of chair with soft safety function, including a skeleton body, a headrest supporting beam which is arranged at the top of the skeleton body and forms a trapezoidal hollow cavity in the middle of the length direction, an angle adjuster connecting beam which is arranged at the bottom of the skeleton body and has two high ends and a low middle part of one side facing upwards, a back upper wing plate which is arranged at the upper part of one side of the skeleton body facing away from a rider in the using state, a back lower wing plate which is arranged at the lower part of one side of the skeleton body facing away from the rider in the using state, and a back support which is arranged at the middle part of one side of the skeleton body facing toward the rider in the using state, wherein the middle part of the back support of the back of the chair is arched towards one side of the rider to form the shape of a semispherical body, and is characterized by further comprising an upper spine curvature adjusting mechanism and an upper spine, the utility model discloses a chair back, including skeleton body, headrest supporting beam, angle modulation ware, back of the chair, the skeleton body include backbone and lower backbone, make by backbone and lower backbone the skeleton body forms the structure of an S font, headrest supporting beam sets up at the top of backbone, the angle modulation ware is connected the crossbeam and is set up the bottom at the backbone down, the back of the chair go up the pterygoid lamina and set up the middle part at the backbone, the back of the chair down the pterygoid lamina sets up the middle part at the backbone down, the back of the chair back holds in the palm and connects between backbone and the backbone down, last backbone curvature adjustment mechanism connect the top of backbone down with go up between the backbone joint mechanism.

In a specific embodiment of the present invention, a spline shaft fixing seat is formed at the lower end of the upper spine, and a lower spine hinge seat is formed at the upper end of the lower spine; the upper spine curvature adjusting mechanism is hinged with the lower spine hinging seat, and the upper spine joint mechanism is connected with the spline shaft fixing seat.

In another specific embodiment of the present invention, the upper spine curvature adjustment mechanism comprises a motor base, a motor shaft guide block, a motor shaft actuating nut block, a guide block shaft limiting plate, a hinge plate and a nut block actuating base, the motor base is fixed to the upper end of one side of the lower spine facing away from the back rest of the chair back, the motor is fixed to the motor base in a longitudinal cantilever state with the motor shaft of the motor facing upward, a motor shaft nut block mating thread is formed on the upper end of the motor shaft, a guide block sliding sleeve is provided on the motor shaft guide block and at a position corresponding to the motor shaft, the motor shaft passes through the guide block sliding sleeve and is in up-and-down sliding fit with the guide block sliding sleeve, a motor shaft guide block left pin shaft extends on the left side of the motor shaft guide block, and a motor shaft guide block right pin shaft extends on the right side of the motor shaft guide block, a left pin shaft of a motor shaft guide block is fixedly inserted into a left pin shaft hole of the motor shaft guide block arranged on the front side of the left end of a guide block shaft limiting plate, a right pin shaft of the motor shaft guide block is matched with a right pin shaft hole of the motor shaft guide block arranged on the front side of the right end of a hinge plate in a pivoting way, an actuating seat bottom plate is formed at the bottom of a nut block actuating seat, a nut block abdicating cavity is formed at the middle position of the front side of the actuating seat bottom plate, a hinge plate hinge seat is formed at the middle position of the rear side of the actuating seat bottom plate and is hinged with the rear side of the hinge plate, a pair of joint outer limiting ring matching seats is formed at the upper part of the nut block actuating seat, a motor shaft actuating nut block is sleeved at the upper end of the motor shaft at the position corresponding to the nut block abdicating cavity and is matched with the motor shaft nut block through threads, and a nut block shaft is respectively fixed on the left side and the right side of the motor shaft actuating nut block, the left nut block shaft is matched with a nut block shaft hole arranged at the front side of the left end of the bottom plate of the actuating seat, the right nut block shaft is matched with a nut block shaft hole arranged at the front side of the right end of the bottom plate of the actuating seat, a guide block shaft limiting plate seat extends from the middle part of the rear side of the guide block shaft limiting plate, the left side and the right side of the guide block shaft limiting plate seat are respectively inserted and matched with a lower spine hinging seat shaft hole arranged at the rear side of the lower spine hinging seat through a guide block shaft limiting plate seat connecting shaft, a hinge plate is positioned between the guide block shaft limiting plate and the actuating seat bottom plate, a hinge plate hinge seat shaft hole is arranged at the rear side of the hinge plate and at the position corresponding to the hinge plate hinge seat, a hinge plate hinge seat pin shaft is respectively fixed on the left side and the right side of the hinge plate hinge seat and is in pivot fit with a hinge plate hinge seat shaft hole; the spline shaft fixing seat formed at the lower end of the lower spine corresponds to the space between the pair of joint outer limiting ring matching seats, and the upper spine joint mechanism is matched with the pair of joint outer limiting ring matching seats.

In another specific embodiment of the present invention, the motor is a forward/reverse motor.

In a further specific embodiment of the present invention, an upper spine arc arch is formed in the middle of the upper spine and at a position corresponding to the upper wing plate of the back of the chair, the middle of the upper wing plate of the back of the chair in the length direction is fixedly connected to the upper spine at a position corresponding to the upper spine arc arch, the left and right ends of the upper wing plate of the back of the chair protrude out of the left and right sides of the upper spine, respectively, a lower spine arc cavity is formed in the middle of the lower spine and at a position corresponding to the lower wing plate of the back of the chair, the middle of the lower wing plate of the back of the chair in the length direction is fixedly connected to the lower spine at a position corresponding to the lower spine arc cavity, and the left and right ends of the lower wing plate of the back of the chair protrude into the left and right sides; the middle position of the bottom of the headrest supporting beam in the length direction is fixed with the top of the upper spine, and the left end and the right end of the headrest supporting beam extend out of the left side and the right side of the upper spine respectively; the central position of the upper part of the angle adjuster connecting beam in the length direction is fixed with the bottom of the lower spine, and the left end and the right end of the angle adjuster connecting beam extend out of the left side and the right side of the lower spine respectively; the chair back support is hinged and connected between the upper spine and the lower spine through a chair back support hinge.

In yet another specific embodiment of the present invention, the upper spine and the lower spine are flat and made of metal lath-like structures; the chair back upper wing plate and the chair back lower wing plate are hollow plastic plates, metal punched plates or metal plates welded into a grid shape.

In a more specific embodiment of the present invention, a recliner connecting flange is formed at each of the left and right ends of the recliner connecting beam.

The utility model discloses a and then a concrete embodiment, last spinal column joint mechanism include a spline shaft and a pair of spline shaft locking release, the spline shaft the middle part with the spline shaft fixing base is inserted admittedly, the spline shaft both ends are respectively stretched out the spline shaft fixing base and are extended respectively a pair of joint outer limit circle cooperation seat in, a pair of spline shaft locking release sets up respectively outside a pair of joint in the limit circle cooperation seat and cooperate with the both ends of spline shaft respectively.

In a still more specific embodiment of the present invention, a plurality of spline grooves are formed on outer walls of both ends of the spline shaft at equal intervals, the pair of spline shaft locking and releasing devices each include an outer retainer, an inner retainer, a plurality of retractable pins equal in number to the plurality of spline grooves, and a plurality of springs equal in number to the plurality of retractable pins, the outer retainer is inserted and fixed in the joint outer retainer fitting seat, an outer retainer spring receiving seat cavity equal in number to the plurality of springs is formed on a side of the outer retainer facing the inner retainer and at a position corresponding to the plurality of springs, the inner retainer is located in the outer retainer, a space between the inner retainer and the outer retainer is formed as a retractable pin displacement space, retractable pin sliding holes equal in number to the plurality of retractable pins are formed on the inner retainer and at a position corresponding to the plurality of retractable pins, and a group of telescopic pins are in sliding fit with the inner limit ring at the positions corresponding to the telescopic pin sliding holes and are in fit with the group of spline grooves, a telescopic pin spring supporting cavity is formed on one side of the group of telescopic pins, which faces the outer limit ring spring supporting cavity, a group of springs are distributed along with the group of telescopic pins, one end of each group of springs is supported in the outer limit ring spring supporting cavity, and the other end of each group of springs is supported in the telescopic pin spring supporting cavity.

In yet another specific embodiment of the present invention, a limiting flange is extended outwardly from one side of the set of retractable pins facing the cavity of the outer retainer ring spring support; the number of the spline grooves in the group is three or four.

One of the technical effects of the technical proposal provided by the utility model is that the rigid framework with Jiong-shaped shape in the prior art is creatively changed into a structural form consisting of an upper spine and a lower spine, and an upper spine curvature adjusting mechanism for adjusting the curvature of the upper spine is arranged between the upper spine and the lower spine, thereby being helpful to improve the comfort of the upper limbs when a driver takes the vehicle; secondly, passengers with different heights can independently and reasonably adjust the upper spine through the upper spine curvature adjusting mechanism according to self needs, so that the degree of coincidence between the chair back and the physiological radian of the back of the driver can be increased; thirdly, under the extreme conditions of vehicle accidents such as collision, vehicle turnover and the like, the spine joint mechanism can enable the upper spine to tilt forwards or backwards, so that the degree that a driver cannot be flicked due to the fact that the driver is not clamped by the chair back clamp is guaranteed, and due flexibility and safety guarantee effects are reflected.

Drawings

Fig. 1 is a structural diagram of an embodiment of the present invention.

Fig. 2 is an enlarged view of a portion a of fig. 1.

Fig. 3 is a rear side schematic view of the upper spine curvature adjustment mechanism shown in fig. 1 and 2.

Fig. 4 is a detailed structural view of the upper spinal joint mechanism shown in fig. 1 to 3.

Detailed Description

In order to make the technical essence and advantages of the present invention more clear, the applicant below describes in detail the embodiments, but the description of the embodiments is not a limitation of the present invention, and any equivalent changes made according to the inventive concept, which are only formal and not essential, should be considered as the technical scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the position state of fig. 1, and thus, should not be interpreted as a specific limitation to the technical solution provided by the present invention.

Referring to the drawings, there are shown a frame body 1, a headrest supporting cross member 2 provided at the top of the frame body 1 and having a trapezoidal hollow in the middle in the longitudinal direction, a recliner connecting cross member 3 provided at the bottom of the frame body 1 and having both ends higher and a middle lower in the upward direction, a seat back upper wing 4 provided at the upper portion of the frame body 1 on the side facing away from a rider in a use state, a seat back lower wing 5 provided at the lower portion of the frame body 1 on the side facing away from the rider in the use state, and a seat back 6 provided at the middle of the frame body 1 on the side facing the rider in the use state, the middle of the seat back 6 being arched toward the rider to form a hemispherical shape, the aforementioned side facing away from the rider in the use state being substantially the front side of the position state shown in fig. 1, as an example, the occupant facing side is substantially the rear side of the position shown in fig. 1 (the same applies hereinafter).

As the technical scheme provided by the utility model: the framework structure system of the back of the aviation seat of the automobile further comprises an upper spine curvature adjusting mechanism 7 (also called as an "upper spine curvature adjusting mechanism" or an "upper spine deflection radian adjusting mechanism", the same shall apply hereinafter) and an upper spine joint mechanism 8, the framework body 1 comprises an upper spine 11 and a lower spine 12, the headrest supporting beam 2 is arranged at the top of the upper spine 11, the recliner connecting beam 3 is arranged at the bottom of the lower spine 12, the upper back wing plate 4 is arranged at the middle of the upper spine 11, the lower back wing plate 5 is arranged at the middle of the lower spine 12, the back support 6 is connected between the upper spine 11 and the lower spine 12, the upper spine curvature adjusting mechanism 7 is connected between the top of the lower spine 12 and the upper spine joint mechanism 8, and the upper spine joint mechanism 8 is connected with the lower end of the upper spine 11.

A spline shaft fixing seat 111 is formed at the lower end of the upper spine 11, and a lower spine hinge seat 121 is formed at the upper end of the lower spine 12; the upper spine curvature adjusting mechanism 7 is hinged to the lower spine hinge base 121, and the upper spine joint mechanism 8 is connected to the spline shaft fixing base 111.

Referring to fig. 2 to 3 in combination with fig. 1, the upper spine curvature adjustment mechanism 7 includes a motor base 71, a motor 72, a motor shaft guide block 73, a motor shaft actuating nut block 74, a guide block shaft limiting plate 75, a hinge plate 76 and a nut block actuating base 77, the motor base 71 is fixed to the upper end of the lower spine 12 on the side opposite to the backrest back 6, the motor 72 is fixed to the motor base 71 in a longitudinally cantilevered state by a set of motor fixing screws 722 with a motor shaft 721 of the motor 72 facing upward, a motor shaft nut block mating screw 7211 is formed on the upper end of the motor shaft 721, a guide block sliding sleeve 731 is disposed on the motor shaft guide block 73 at a position corresponding to the motor shaft 721, the motor shaft 721 passes through the guide block sliding sleeve 731 from bottom to top and is in sliding fit with the guide block sliding sleeve 731 up and down, a motor shaft guide block left pin 732 extends on the left side of the motor shaft guide block 73, a motor shaft guide block right pin shaft 733 extends from the right side surface of the motor shaft guide block 73, the motor shaft guide block left pin shaft 732 is fixedly inserted into a motor shaft guide block left pin shaft hole 751 which is arranged on the front side of the left end of the guide block shaft limiting plate 75, the motor shaft guide block right pin shaft 733 is in pivot fit with a motor shaft guide block right pin shaft hole 761 which is arranged on the front side of the right end of the hinge plate 76, a moving seat bottom plate 771 is formed at the bottom of the nut block actuating seat 77, a nut block abdicating cavity 7711 is formed at the center position of the front side of the moving seat bottom plate 771, a hinge plate articulated seat 7712 (shown in fig. 3) is formed at the center position of the rear side of the moving seat bottom plate 771, the hinge plate articulated seat 7712 is articulated with the rear side of the hinge plate 76, a pair of outer joint limiting ring fitting seats 772 is formed at the upper part of the nut block actuating seat 77, the motor shaft actuating nut block 74 is sleeved at the upper end of the nut block abdicating cavity 7711 and is fitted with the motor shaft block 721 A nut block shaft 741 is threadedly engaged with the engaging thread 7211, a nut block shaft 741 is fixed to each of left and right sides of the motor shaft actuator nut block 74, the left nut block shaft 741 is engaged with a nut block shaft hole 7713 opened at a front side of a left end of the actuator base plate 771, the right nut block shaft 741 is engaged with a nut block shaft hole 7713 opened at a front side of a right end of the actuator base plate 771, a guide block shaft restricting plate holder 752 (shown in fig. 3) extends in a middle portion of a rear side of the guide block shaft restricting plate 75, each of left and right sides of the guide block shaft restricting plate holder 752 is inserted and fitted with a lower spine hinge holder shaft hole 1211 opened at a rear side of the lower spine hinge holder 121 through a guide block shaft restricting plate holder coupling shaft 7521, a hinge plate 76 is interposed between the guide block shaft restricting plate 75 and the actuator base plate 771, a hinge holder shaft hole 762 is opened at a rear side of the hinge plate 76 and at a position corresponding to the hinge holder 7712, a hinge plate hinge seat pin 77121 (shown in fig. 3) is fixed on each of the left side and the right side of the hinge plate hinge seat 7712, and the hinge plate hinge seat pin 77121 is pivotally matched with the hinge plate hinge seat shaft hole 762; the spline shaft fixing seat 111 formed at the lower end of the lower spine 12 corresponds to the space between the pair of outer joint limiting ring fitting seats 772, and the upper spine joint mechanism 8 is fitted to the pair of outer joint limiting ring fitting seats 772.

The motor 72 is a forward and reverse rotation motor, in an actual use state, the motor 72 is supported by a vehicle-mounted power supply to work, and the motor 72 is electrically connected with a control switch at the armrest position or other reasonable positions of the seat through a conductive circuit and is controlled by the control switch to work.

When an occupant (also referred to as a "rider") pushes and pulls the aforementioned control switch, the motor 72 is operated to drive the motor shaft actuator nut block 74 by the motor shaft nut block fitting thread 7211 on the motor shaft 721, for example, to displace the motor shaft actuator nut block 74 upward, so that the motor shaft actuator nut block 74 displaces the front side of the actuator base plate 771 of the nut block actuator base 77 upward, in the process, the aforementioned hinge plate hinge base 7712 pivots around the hinge plate hinge shaft hole 762 of the hinge plate 76 by the hinge plate hinge base pin 77121 thereof, the aforementioned spline shaft fixing base 111 is driven by the pair of outer joint defining ring fitting bases 772 through the upper spine joint mechanism 8 to be described later, and since the spline shaft fixing base 111 is formed at the lower end of the upper spine 11, the deflection of the lower end of the upper spine 11 is changed by the spline shaft fixing base 111 to change the degree of curvature of the upper spine 11, to accommodate the physiological curvature of the occupant. When the hinge plate hinge seat 7712 of the aforementioned actuator seat bottom plate 771 downwardly displaces the rear side of the hinge plate 76 by the hinge plate hinge seat pin 77121, the motor shaft guide block right pin hole 761 of the front side of the hinge plate 76 is rotated by a corresponding angle around the motor shaft guide block right pin 733. When the upper spine 11 is adjusted in the opposite direction, the operation process is reversed by simply turning the control switch in the opposite direction, and thus the above-mentioned operation process is not repeated.

As shown in fig. 1, an upper spine arc is formed in the middle of the upper spine 11 and at a position corresponding to the upper wing plate 4 of the backrest, the middle of the upper wing plate 4 of the backrest in the length direction is fixedly connected to the upper spine 11 at a position corresponding to the upper spine arc, the left and right ends of the upper wing plate 4 of the backrest respectively protrude out of the left and right sides of the upper spine 11, a lower spine arc concave cavity opposite to the upper spine arc direction is formed in the middle of the lower spine 12 and at a position corresponding to the lower wing plate 5 of the backrest, the middle of the lower wing plate 5 of the backrest in the length direction is fixedly connected to the lower spine 12 at a position corresponding to the lower spine arc concave cavity, and the left and right ends of the lower wing plate 5 of the backrest respectively protrude into the left and right sides of the lower spine 12; the middle position of the bottom of the headrest supporting beam 2 in the length direction is welded and fixed with the top of the upper spine 11, and the left end and the right end of the headrest supporting beam 2 respectively extend out of the left side and the right side of the upper spine 11; the angle adjuster is connected with the upper middle position of the beam 3 in the length direction and is welded and fixed with the bottom of the lower spine 12, and the left end and the right end of the beam 3 extend out of the left side and the right side of the lower spine 12 respectively; the backrest support 6 is hinged between the upper spine 11 and the lower spine 12 by a backrest support hinge 61.

As schematically shown in fig. 1, the upper spine 11 and the lower spine 12 form the framework body 1 into an S-shaped structure. In addition, the upper spine 11 and the lower spine 12 may be referred to as an "upper backup plate" and a "lower backup plate", respectively, in accordance with common general knowledge.

In the present embodiment, the upper spine 11 and the lower spine 12 are flat and made of metal and have a strip-shaped (i.e., "lath-shaped") structure; the chair back upper wing plate 4 and the chair back lower wing plate 5 are hollow plastic plates, metal punched plates or metal plates welded into a grid shape.

When the backrest upper wing plate 4 and the backrest lower wing plate 5 are plastic plates molded, for example, by injection molding, the backrest upper wing plate fastener 41 and the backrest lower wing plate fastener 51 are preferably fixed to the upper spine 11 and the lower spine 12, respectively. The seatback upper panel fasteners 41 and the seatback lower panel fasteners 51 are rivets, screws, or the like. When the seatback upper wing plate 4 and the seatback lower wing plate 5 are made of a metal plate or a welded grid-like metal plate, the seatback upper wing plate 4 and the seatback lower wing plate 5 are welded to the upper spine 11 and the lower spine 12, respectively, or are fixed by riveting with rivets or screws.

As shown in figure 1, the left end and the right end of the angle adjuster connecting beam 3 are respectively provided with an angle adjuster connecting flange 31, and the framework of the whole automobile aviation seat back is connected with the framework of the automobile seat along with the connection of the angle adjuster connecting flange 31 and an adjuster. Since the connection method is common knowledge, the description is not repeated.

Referring to fig. 4 in combination with fig. 1 to 3, the aforementioned upper spine joint mechanism 8 includes a spline shaft 81 and a pair of spline shaft locking and releasing devices 82, the middle of the spline shaft 81 is inserted into the aforementioned spline shaft fixing base 111, two ends of the spline shaft 81 respectively protrude out of the spline shaft fixing base 111 and respectively extend into the aforementioned pair of outer joint defining ring fitting bases 772, and the pair of spline shaft locking and releasing devices 82 are respectively disposed in the pair of outer joint defining ring fitting bases 772 and respectively fit with two ends of the spline shaft 81.

A plurality of spline grooves 811 are formed on outer walls of both ends of the spline shaft 81 at equal intervals, the pair of spline shaft lock releasing devices 82 each include an outer retainer 821, an inner retainer 822, a plurality of telescopic pins 823 equal in number to the plurality of spline grooves 811, and a plurality of springs 824 equal in number to the plurality of telescopic pins 823, the outer retainer 821 is inserted and fixed in the outer joint retainer fitting 772, outer retainer spring support pockets 8211 equal in number to the plurality of springs 824 are formed on a side of the outer retainer 821 facing the inner retainer 822 and at positions corresponding to the plurality of springs 824, the inner retainer 822 is located in the outer retainer 821, a space between the inner retainer 822 and the outer retainer 821 is formed as a telescopic pin displacement space 825, a plurality of telescopic pin sliding holes 8221 equal in number to the plurality of telescopic pins 823 are formed in the inner retainer 822 and at positions corresponding to the plurality of telescopic pins 823, a set of retractable pins 823 is slidably fitted into the inner retainer 822 at positions corresponding to the retractable pin sliding holes 8221 and is fitted into the aforementioned set of spline grooves 811, a retractable pin spring receiving chamber 8231 is opened in the set of retractable pins 823 on a side facing the aforementioned outer retainer spring receiving chamber 8211, a set of springs 824 is distributed along the aforementioned set of retractable pins 823, one end of the set of springs 824 is supported in the aforementioned outer retainer spring receiving chamber 8211, and the other end is supported in the retractable pin spring receiving chamber 8231.

Preferably, a limiting flange 8232 is formed on the side of the set of retractable pins 823 facing the outer retainer ring spring bearing cavity 8211; since the number of the set of spline grooves 811 is four in this embodiment, the number of the outer retainer spring support cavity 8211, the set of telescopic pins 823 and the set of springs 824 is also four, but the number of the set of spline grooves 811 may also be three.

When the vehicle encounters extreme conditions, such as a crash, during travel, since the aforementioned upper spine 11 and lower spine 12 are flexible, i.e. having a deformability in case of sudden accident, for example under the action of inertia, when the upper vertebral column 11 is elastically displaced in the direction opposite to the head, the spline shaft fixing seat 111 below the upper spine 11 drives the spline shaft 81 of the structural system of the upper spine joint mechanism 8 to rotate for an angle, the group of spline pins 823 retreats from the group of spline grooves under the action of the group of springs 824, and after the spline shaft 81 finishes the rotation for an angle, the set of telescopic pins 823 is returned to the state of being engaged with the set of spline grooves 811 of the spline shaft 81 rotated by the actual angle by the restoring force of the set of springs 824, therefore, the chair back can be prevented from clamping the seat occupant in an accident state in the space where the seat occupant cannot move, and the safety guarantee effect is effectively achieved.

To sum up, the technical solution provided by the present invention remedies the defects in the prior art, successfully completes the invention task, and faithfully embodies the technical effects mentioned in the above technical effect column by the applicant.

Claims (10)

1. An automobile backrest with soft safety function comprises a framework body (1), a headrest supporting beam (2) arranged at the top of the framework body (1) and forming a trapezoidal hollow cavity in the middle of the length direction, an angle adjuster connecting beam (3) which is arranged at the bottom of the framework body (1), is high at two ends of one side facing upwards and is low in the middle, a backrest upper wing plate (4) arranged at the upper part of the framework body (1) facing away from a rider in a use state, a backrest lower wing plate (5) arranged at the lower part of the framework body (1) facing away from the rider in a use state and a backrest back support (6) arranged at the middle part of the framework body (1) facing towards the rider in a use state, wherein the middle part of the backrest back support (6) is arched towards one side of the rider to form the shape of a semispherical body, and is characterized by further comprising an upper spine curvature adjusting mechanism (7) and an upper spine joint mechanism (8) The angle adjuster comprises a framework body (1) and a backrest, wherein the framework body comprises an upper spine (11) and a lower spine (12), the upper spine (11) and the lower spine (12) form an S-shaped structure, a headrest supporting beam (2) is arranged at the top of the upper spine (11), an angle adjuster connecting beam (3) is arranged at the bottom of the lower spine (12), a chair back upper wing plate (4) is arranged in the middle of the upper spine (11), a chair back lower wing plate (5) is arranged in the middle of the lower spine (12), a chair back support (6) is connected between the upper spine (11) and the lower spine (12), an upper spine curvature adjusting mechanism (7) is connected between the top of the lower spine (12) and an upper spine joint mechanism (8), and the upper spine joint mechanism (8) is connected with the lower end of the upper spine (11).

2. The seatback for vehicle having soft safety function as claimed in claim 1, wherein a spline shaft holder (111) is formed at a lower end of said upper spine (11), and a lower spine hinge holder (121) is formed at an upper end of said lower spine (12); the upper spine curvature adjusting mechanism (7) is hinged with the lower spine hinging seat (121), and the upper spine joint mechanism (8) is connected with the spline shaft fixing seat (111).

3. The seatback with soft safety function according to claim 2, wherein said upper spine curvature adjusting mechanism (7) comprises a motor base (71), a motor (72), a motor shaft guide block (73), a motor shaft actuating nut block (74), a guide block shaft defining plate (75), a hinge plate (76) and a nut block actuating seat (77), the motor base (71) is fixed to an upper end of a side of said lower spine (12) facing away from said seatback back rest (6), the motor (72) is fixed to the motor base (71) in a longitudinally cantilevered state with a motor shaft (721) of the motor (72) facing upward, a motor shaft nut block fitting screw (7211) is formed at an upper end of the motor shaft (721), a guide block sliding sleeve (731) is provided on the motor shaft guide block (73) and at a position corresponding to the motor shaft (721), and the motor shaft (721) passes through the guide block sliding sleeve (731) and slides up and down with the guide block sliding sleeve (731) A motor shaft guide block left pin shaft (732) extends on the left side surface of the motor shaft guide block (73), a motor shaft guide block right pin shaft (733) extends on the right side surface of the motor shaft guide block (73), the motor shaft guide block left pin shaft (732) is inserted and embedded and fixed with a motor shaft guide block left pin shaft hole (751) arranged on the front side of the left end of the guide block shaft limiting plate (75), the motor shaft guide block right pin shaft (733) is in pivot fit with a motor shaft guide block right pin shaft hole (761) arranged on the front side of the right end of the hinge plate (76), an actuating seat bottom plate (771) is formed at the bottom of the nut block actuating seat (77), a nut block abdicating cavity (7711) is arranged at the central position of the front side of the actuating seat bottom plate (771), a hinge plate hinging seat (7712) is formed at the central position of the rear side of the actuating seat bottom plate (771), the hinge plate seat (7712) is hinged with the rear side of the hinge plate (76), a pair of outer joint limiting ring matching seats (772) are formed at the upper part of the nut block actuator seat (77), a motor shaft actuator nut block (74) is sleeved at the upper end of the motor shaft (721) at a position corresponding to the nut block abdicating cavity (7711) and is in threaded matching with the motor shaft nut block matching threads (7211), a nut block shaft (741) is respectively fixed at the left side and the right side of the motor shaft actuator nut block (74), the nut block shaft (741) at the left side is matched with a nut block shaft hole (7713) formed at the front side of the left end of the actuator seat bottom plate (771), the nut block shaft (741) at the right side is hinged with a nut block shaft hole (7713) formed at the front side of the right end of the actuator seat bottom plate (771), a guide block shaft limiting plate seat (752) extends from the middle part of the rear side of the guide block shaft limiting plate (75), and connecting shafts at the left side and the right side of the guide block shaft limiting plate seat (752) are limited by guide block shafts and are arranged below the spinal column seat (7521) (121) The lower spine hinge seat shaft hole (1211) on the rear side of the lower spine hinge seat is inserted and embedded and matched, the hinge plate (76) is positioned between the guide block shaft limiting plate (75) and the actuator seat bottom plate (771), a hinge plate hinge seat shaft hole (762) is formed in the rear side of the hinge plate (76) and at the position corresponding to the hinge plate hinge seat (7712), hinge plate hinge seat pin shafts (77121) are respectively fixed on the left side and the right side of the hinge plate hinge seat (7712), and the hinge plate hinge seat pin shaft (77121) is in pivot matching with the hinge plate hinge seat shaft hole (762); the spline shaft fixing seat (111) formed at the lower end of the lower spine (11) corresponds to the space between the pair of joint outer limiting ring matching seats (772), and the upper spine joint mechanism (8) is matched with the pair of joint outer limiting ring matching seats (772).

4. The automotive seat back with soft safety function as claimed in claim 3, characterized in that the motor (72) is a forward and reverse motor.

5. The vehicle seat back with soft safety function as claimed in claim 1, wherein an upper spine arc is formed at a middle portion of the upper spine (11) and at a position corresponding to the upper wing plate (4) of the seat back, the middle portion of the upper wing plate (4) of the seat back in the length direction is fixedly connected to the upper spine (11) at a position corresponding to the upper spine arc, the left end and the right end of the upper wing plate (4) of the chair back respectively extend out of the left side and the right side of the upper spine (11), a lower spine arc concave cavity is formed in the middle of the lower spine (12) and at the position corresponding to the lower wing plate (5) of the chair back, the middle of the lower wing plate (5) of the chair back in the length direction is fixedly connected with the lower spine (12) at the position corresponding to the lower spine arc concave cavity, the left end and the right end of the lower wing plate (5) of the chair back respectively extend into the left side and the right side of the lower spine (12); the middle position of the bottom of the headrest supporting beam (2) in the length direction is fixed with the top of the upper spine (11), and the left end and the right end of the headrest supporting beam (2) extend out of the left side and the right side of the upper spine (11) respectively; the central position of the upper part of the angle adjuster connecting beam (3) in the length direction is fixed with the bottom of the lower spine (12), and the left end and the right end of the angle adjuster connecting beam (3) extend out of the left side and the right side of the lower spine (12); the chair back support (6) is hinged and connected between the upper spine (11) and the lower spine (12) through a chair back support hinge (61).

6. The automotive seat back with soft safety function as claimed in claim 1 or 5, characterized in that the upper spine (11) and the lower spine (12) are flat and made of metal strip-like configuration; the chair back upper wing plate (4) and the chair back lower wing plate (5) are hollow plastic plates, metal punched plates or metal plates welded into a grid shape.

7. The vehicle seat back with soft safety function as claimed in claim 1 or 5, wherein a recliner connecting flange (31) is formed at each of left and right ends of the recliner connecting cross member (3).

8. The seatback with soft safety function according to claim 3, wherein said upper spine joint mechanism (8) comprises a spline shaft (81) and a pair of spline shaft locking and releasing devices (82), the middle of the spline shaft (81) is inserted into said spline shaft holder (111), the two ends of the spline shaft (81) respectively protrude out of the spline shaft holder (111) and respectively extend into said pair of outer joint limiting ring fitting seats (772), and the pair of spline shaft locking and releasing devices (82) respectively are disposed in the pair of outer joint limiting ring fitting seats (772) and respectively fit with the two ends of the spline shaft (81).

9. The automobile seat back with a soft safety function according to claim 8, wherein a set of spline grooves (811) are formed on outer walls of both ends of the spline shaft (81) in a state of being spaced at equal intervals, each of the pair of spline shaft lock releasing means (82) includes an outer retainer (821), an inner retainer (822), a set of telescopic pins (823) equal in number to the set of spline grooves (811), and a set of springs (824) equal in number to the set of telescopic pins (823), the outer retainer (821) is inserted and fixed in the knuckle outer retainer fitting seat (772), an outer retainer spring receiving seat cavity (8211) equal in number to the set of springs (824) is formed on a side of the outer retainer (821) facing the inner retainer (822) and at a position corresponding to the set of springs (824), the inner retainer (822) is located in the outer retainer (821), the space between the inner limit ring (822) and the outer limit ring (821) is formed as a telescopic pin displacement space (825), telescopic pin sliding holes (8221) with the same number as the telescopic pins (823) are formed in the inner limit ring (822) at the position corresponding to the telescopic pins (823), the telescopic pins (823) are in sliding fit with the inner limit ring (822) at the position corresponding to the telescopic pin sliding holes (8221) and are matched with the spline grooves (811), a telescopic pin spring supporting cavity (8231) is arranged on the group of telescopic pins (823) and faces to one side of the outer limiting ring spring supporting seat cavity (8211), a group of springs (824) are distributed along the group of telescopic pins (823), one end of the set of springs (824) is supported in the outer retainer ring spring bearing pocket (8211) and the other end is supported in the telescoping pin spring bearing pocket (8231).

10. The vehicle seat back with soft safety as claimed in claim 9, wherein a limiting flange (8232) is expanded outward from one side of the set of retractable pins (823) facing the outer retainer spring receiving cavity (8211); the number of the group of spline grooves (811) is three or four.

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