An automotive electric seat backrest support structure and a method of mounting the same

Abstract

The application belongs to the technical field of automobile seats, and particularly relates to an automobile electric seat backrest supporting structure and a mounting method thereof, which comprises a backrest frame, the backrest frame adopts an inverted U-shaped structure frame; two support frames are fixedly installed at the bottom of the two ends of the backrest frame; two bottom support frames are symmetrically rotationally connected to the bottom outer side of the backrest frame; and two back-pushing frames are assembled at the bottom of the two bottom support frames. The application can timely limit the relative rotation of the motor output end and the rotating rod after the rotating rod is broken, timely stop the relative rotation between the back frame and the bottom support frame, avoid the reverse injury of the passenger when the seat backrest is damaged, and simultaneously make the whole seat quickly move away from the steering wheel when the impact occurs, so that the passenger quickly moves away from the impact area and the injury degree of the passenger in the car accident is reduced.

Description

Technical Field

[0001] This invention belongs to the field of automotive seat technology, specifically relating to an automotive electric seat back support structure and its installation method. Background Technology

[0002] Electric seat adjustment allows you to adjust the seat's fore-and-aft position, height, and backrest angle using a motor. More luxurious models can also adjust thigh support and lumbar support. The seat back and seat base are equipped with a motor and other components to enable the adjustment of the backrest rotation.

[0003] Problems with existing technology:

[0004] When a vehicle is involved in a collision, if the impact force is too great, the backrest structure and the base structure of the seat may break. When the two break, the backrest structure will continue to rotate forward and squeeze the passenger under the action of inertia, making it impossible for the passenger to move away from the collision area quickly. In more serious cases, it may cause secondary injuries to the passenger and aggravate the degree of the passenger's injury. Summary of the Invention

[0005] The purpose of this invention is to provide a support structure for the backrest of an electric car seat and its installation method, which can promptly limit the relative rotation between the motor output end and the rotating rod after breakage, and promptly stop the relative rotation between the backrest frame and the base support structure, so as to avoid the passenger being injured in the opposite direction when the seat back is damaged. At the same time, in the event of an impact, the entire seat can be quickly moved away from the steering wheel, so that the passenger can be quickly moved away from the impact area, reducing the degree of injury to the passenger in a car accident.

[0006] The specific technical solution adopted by this invention is as follows:

[0007] An electric car seat back support structure includes a backrest frame, the backrest frame adopts an inverted "U" shaped structure frame, and the bottom of both ends of the backrest frame are provided with rotating holes, and the two ends of the backrest frame and above the rotating holes are provided with slotted rod holes.

[0008] A drive frame rod is fixedly installed on the bottom inner side of the backrest frame, and motor housings are fixedly installed at both ends of the drive frame rod, with a motor fixedly installed inside the motor housings;

[0009] The support structure comprises two support structures respectively fixedly installed at the bottom of both ends of the backrest frame. A straight groove frame is fixedly installed through the inner wall of the support structure and the straight groove frame passes through the groove rod hole. A rotating rod is fixedly connected through the inside of the support structure and the rotating rod passes through the rotating hole and is fixedly connected to the backrest frame. The output end of the motor is fixedly connected to one end of the rotating rod.

[0010] The straight slot frame has an internally inserted through rod that is movably connected to its interior. A movable joint rod and an end frame are fixedly connected to both ends of the internally inserted through rod, respectively. An insert rod is movably inserted into the bottom of the movable joint rod, and a rotating rod sleeve is fixedly connected to the bottom end of the insert rod. The rotating rod sleeve is fixedly installed on the outer surface of the rotating rod near the motor end. An arc-shaped guide hole and a straight guide hole are formed on the surface of the movable joint rod, with the straight guide hole located on one side of the arc-shaped guide hole and communicating with it. An output sleeve is fixedly installed on the outer surface of the motor output end. A side rod is fixedly connected to one side of the outer wall of the output sleeve, and a guide pin is fixedly connected to the end side wall of the side rod. The guide pin is movably inserted into the arc-shaped guide hole.

[0011] The bottom support structure consists of two symmetrically rotatably connected to the bottom outer side of the backrest frame. One end of each bottom support structure has a through hole at its top, and a connecting block is fixedly installed inside the through hole. One end of the connecting block is located on the outer wall of the bottom support structure and is fixedly connected to a saw gear. The other end of the connecting block is rotatably connected to the rotating rod. A toothed block is fixedly provided at the bottom of the end frame, and the toothed block is movably engaged with the saw gear.

[0012] The built-in through rod also passes through the groove rod hole, and a spring is fixedly connected between the built-in through rod and the inner wall of the groove rod hole, and the spring is in a compressed state.

[0013] The two support structures are connected by a back-mounted bracket welded to the back. Both ends of the back-mounted bracket are welded with support plates. Horizontal structures are fixedly welded to the back of the backrest frame at equal intervals. Mesh structures are fixedly connected to the inner side of the backrest frame at equal intervals.

[0014] The through hole and the rotating hole are located on the same axis. An arc-shaped guide groove is provided at one end of the bottom support structure and at the bottom of the through hole. The arc-shaped guide groove is used to limit the rotation range of the backrest frame. A guide post is fixedly connected to the bottom outer wall of the support structure, and the guide post is movably inserted into the arc-shaped guide groove.

[0015] The inner sides of the two bottom support structures are fixedly connected with crossbeams and end crossbeams, and the crossbeams are fixedly connected to the bottom support structures by bolts screwed at both ends. The upper surface of the crossbeams is set as a laying plane, and the surface of the crossbeams is provided with nail holes that penetrate the crossbeams at equal intervals.

[0016] A bottom frame plate is provided on the inner wall of the bottom support structure and on the upper surface of the laying plane. An extension plate is fixedly provided at equal intervals on the inner wall of the bottom frame plate, and a nail hole one corresponding to the nail hole two is opened at the end of the extension plate. The bottom frame plate and the cross beam are fixedly connected by screws that pass through the nail hole one and the nail hole two.

[0017] The inner bottom of the two base support structures is fixedly connected with a folded plate, and the end of the folded plate near the arc-shaped guide groove is provided with an insert groove. A limit block and a stop block are fixedly provided on the outer wall of one end of the base support structure, and the stop block is located above the limit block.

[0018] It also includes a back thrust frame, two of which are respectively assembled at the bottom of the two base support structures. One end of the back thrust frame is provided with a stop for abutting one end of the folding plate. A guide rod is fixedly connected to the upper surface of the back thrust frame and to one side of the stop. An insert block is embedded inside the insert groove, and the two ends of the insert block are provided with slots for locking the folding plate. Guide sleeves are fixedly connected to both ends of the lower surface of the insert block, and the guide sleeves are movably sleeved on the outer surface of the guide rod. One end of one of the guide sleeves is fixedly connected with a retaining ring. A second spring is connected between the retaining ring and the side wall of the stop, and the second spring is sleeved on the outer surface of the guide rod and is in a compressed state.

[0019] An outer tube is embedded and movably sleeved on the outer surface of the middle part of the guide rod, and the outer diameter of the outer tube is the same as the diameter of the guide rod. A screw groove is opened on the outer surface of the outer tube. A push rod is rotatably connected to the lower surface of the insert block, and the end of the push rod is movably inserted into the screw groove.

[0020] The top of the recoil frame away from the abutment is rotatably connected to a spring tube, and a spring is provided inside the spring tube. A support rod and a limiting rod are fixedly connected to the outer wall of the spring tube respectively. The end of the support rod is movably inserted into the inner side of the limiting block and the abutment block, and the spring is in a compressed state. The limiting rod is used to limit the rotation angle of the spring tube.

[0021] An installation method for an electric car seat backrest support structure, the specific steps of which are as follows;

[0022] S1: After the backrest frame and the support structure are completed, assemble the backrest frame and the support structure. First, insert the bottom of the backrest frame into the inside of the support structure and align the straight groove frame with the groove rod hole. Then, insert the rotating rod into the groove rod hole and the support structure, and weld the rotating rod to the backrest frame and the support structure respectively.

[0023] S2: Next, fix the output sleeve on the outer surface of the motor output end, fix the rotating rod sleeve on the outer surface of the rotating rod, then pass the built-in through rod through the straight slot frame and weld the live joint frame rod to the other end of the built-in through rod. Then install the drive frame rod and fix the output ends of the motor at both ends of the drive frame rod to the rotating rod. Finally, insert the plug rod into the live joint frame rod and then insert the guide pin into the arc-shaped guide hole.

[0024] S3: Assemble the base support frame and the backrest frame. First, connect the adapter block to the end of the rotating rod. Then, fix and weld the adapter block inside the through hole. Finally, fix and install the saw gear at the end of the adapter block and on the outer wall of the base support frame. After the assembly is completed, there is a certain distance between the tooth block and the saw gear, and the spring is in a compressed state. Finally, assemble another base support frame in the same way.

[0025] S4: After the bottom support frame and the backrest frame are assembled, the two bottom support frames are fixedly connected by the cross beam. Then, the bottom frame plate is laid on the surface of the cross beam and fixed with screws.

[0026] S5: Finally, assemble the bottom frame plate at the bottom of the base support structure. First, move the insert block along the guide rod and squeeze the second spring. Under the elastic force of the second spring, the abutment rod will press against the inside of one end of the screw groove, as shown in the figure. Then, press the abutment rod against the insert block to insert it into the insert groove and press the abutment against one end of the folding plate. At this time, the support rod can be rotated so that its end presses against the limit block and the abutment block. At this time, the coil spring inside the coil tube is in a compressed state. After the bottom frame plate and the base support structure are assembled, assemble the bottom frame plate with the electric slide for seat sliding.

[0027] The technical effects achieved by this invention are as follows:

[0028] (1) In this invention, when the front of the vehicle violently impacts other objects, the back frame will tend to rotate forward under the action of inertia. When the motor output end and the rotating rod break and relative rotation occurs, the guide pin will disengage from the inside of the arc-shaped guide hole. At this time, the live joint rod will not be blocked by the guide pin, and the built-in through rod will be pushed by the spring. At this time, the abutment block will quickly mesh with the saw gear, thereby timely limiting the relative rotation after the motor output end and the rotating rod break, and timely stopping the relative rotation between the back frame and the bottom support structure. This avoids the passenger from being injured in the opposite direction when the seat back is damaged, avoids the serious deformation of the seat as a whole when a car accident occurs, and further avoids the passenger from suffering secondary injury to the seat back in a car accident.

[0029] (2) In the present invention, when a vehicle is involved in a collision, the bottom support structure will move relative to the anti-collision frame under the action of inertia. At this time, the end of the abutment will slide inside the screw groove, and the outer tube will rotate relative to the guide rod. When the abutment moves out along the inclined surface at the end of the screw groove, the position of the insert block will no longer be restricted by the abutment. Finally, the bottom support structure will quickly rebound under the action of the second compression spring. In addition, the end of the support rod will also disengage from the inner side of the limit block and the abutment, releasing the fixed state between the bottom support structure and the anti-collision frame. Finally, the bottom support structure, together with the back frame and the entire seat, will quickly move away from the steering wheel under the action of the second spring, thereby allowing the passenger to quickly move away from the impact point at the front of the vehicle, further reducing the impact force on the passenger in the car accident and minimizing the degree of injury to the passenger in the car accident.

[0030] (3) In this invention, the combination of the bottom support structure, the cross beam and the bottom frame plate replaces the traditional one-piece fixed base structure, which changes the traditional assembly method of the back frame and the base frame. This not only enables the combination to cooperate with the assembly of components such as the support structure, but also eliminates the traditional hoisting base structure assembly process for the seat base assembled from the bottom support structure, the cross beam and the bottom frame plate, making the installation of the back frame simpler and eliminating the need for other hoisting equipment. Attached Figure Description

[0031] Figure 1 This is a front perspective view provided in an embodiment of the present invention;

[0032] Figure 2 This is a rear-view, upward-looking perspective view provided in an embodiment of the present invention;

[0033] Figure 3 This is an exploded view provided in an embodiment of the present invention;

[0034] Figure 4 This is an assembly diagram of the support structure and the base support structure provided in the embodiments of the present invention;

[0035] Figure 5 This is an exploded assembly diagram of the support architecture provided in an embodiment of the present invention;

[0036] Figure 6 This is a diagram of the drive structure of the live joint rod provided in an embodiment of the present invention;

[0037] Figure 7 This is an exploded view of the assembly of the bottom support structure and the bottom frame plate provided in an embodiment of the present invention;

[0038] Figure 8 This is an exploded assembly diagram of the base support structure and the shock absorber provided in an embodiment of the present invention;

[0039] Figure 9 yes Figure 8 A magnified view of a section at point A in the middle;

[0040] Figure 10 yes Figure 8 A magnified view of a section at point B in the middle.

[0041] The attached diagram lists the components represented by each number as follows:

[0042] 1. Backrest frame; 101. Horizontal frame; 102. Mesh frame; 103. Groove hole; 104. Rotary hole;

[0043] 2. Support structure; 201. Back-connecting frame; 202. Support plate; 203. Guide column; 204. Straight groove frame; 205. Rotating rod; 206. Adapter block; 207. Saw gear; 208. Output sleeve; 209. Side rod; 210. Guide pin; 211. Rotating rod sleeve; 212. Insert rod; 213. Connecting frame rod; 214. Internal through rod; 215. Spring 1; 216. End frame; 217. Abutment block; 218. Arc-shaped guide hole; 219. Straight guide hole;

[0044] 3. Drive frame pole; 301. Motor housing; 302. Motor;

[0045] 4. Base support structure; 401. Through hole; 402. Arc-shaped guide groove; 403. Embedding groove; 404. Folded plate; 405. Limiting block; 406. Abutment block;

[0046] 5. Base frame plate; 501. Extension plate; 502. Nail hole one;

[0047] 6. Crossbeam; 601. Laying surface; 602. Nail hole two; 603. Bolt;

[0048] 7. End crossbeam;

[0049] 8. Backing frame; 801. Abutment frame; 802. Guide rod; 803. Insert block; 804. Slot; 805. Guide sleeve; 806. Retaining ring; 807. Spring II; 808. Outer tube; 809. Screw groove; 810. Abutment rod; 811. Spring tube; 812. Support rod; 813. Limiting rod. Detailed Implementation

[0050] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0051] like Figure 1-3As shown, an electric car seat back support structure includes a backrest frame 1. The backrest frame 1 adopts an inverted "U" shaped frame structure, and the bottom of both ends of the backrest frame 1 are provided with rotating holes 104. The two ends of the backrest frame 1 and above the rotating holes 104 are provided with slotted rod holes 103. The back of the backrest frame 1 is fixedly welded with a horizontal frame 101 at equal intervals, and the inner side of the backrest frame 1 is fixedly connected with a mesh frame 102 at equal intervals.

[0052] According to the above structure, the horizontal frame 101 is used to increase the overall strength of the backrest frame 1, and the mesh frame 102 is used to replace the all-steel backrest, saving the material used for the backrest frame.

[0053] See attached document Figure 3 The drive frame rod 3 is fixedly installed on the bottom inner side of the backrest frame 1, and motor housings 301 are fixedly installed at both ends of the drive frame rod 3. A motor 302 is fixedly installed inside the motor housings 301.

[0054] See attached document Figure 3 and Figure 4 The support structure 2 is fixedly installed at the bottom of both ends of the backrest frame 1. The two support structures 2 are connected by a back joint 201 welded on the back. Support plates 202 are welded to both ends of the surface of the back joint 201. A straight groove frame 204 is fixedly installed through the inner wall of the support structure 2 and passes through the groove rod hole 103. A rotating rod 205 is fixedly connected through the inside of the support structure 2 and passes through the rotating hole 104 and forms a fixed connection with the backrest frame 1. The output end of the motor 302 is fixedly connected to one end of the rotating rod 205.

[0055] According to the above structure, when the motor 302 is started, its output end will drive the rotating rod 205 to rotate. Since the rotating rod 205 is fixedly connected to the backrest frame 1 and the support structure 2, the rotating rod 205 will drive the backrest frame 1 and the support structure 2 to rotate together, thereby achieving the effect of changing the angle of the backrest frame 1.

[0056] See attached document Figure 5 and Figure 6An internal through rod 214 is movably inserted into the straight groove frame 204. The internal through rod 214 also passes through the groove rod hole 103, and a spring 215 is fixedly connected between the internal through rod 214 and the inner wall of the groove rod hole 103. The spring 215 is under compression. A movable joint frame rod 213 and an end frame 216 are fixedly connected to both ends of the internal through rod 214, respectively. An insert rod 212 is movably inserted into the bottom of the movable joint frame rod 213. A rotating rod sleeve 211 is fixedly connected to the bottom end of the insert rod 212, and the rotating rod sleeve 211 is fixedly installed on the rotating rod 212. 05. On the outer surface of one end of the motor 302, the surface of the live joint bracket 213 is provided with an arc-shaped guide hole 218 and a straight guide hole 219 that penetrate the live joint bracket 213. The straight guide hole 219 is located on one side of the arc-shaped guide hole 218 and communicates with the arc-shaped guide hole 218. An output sleeve 208 is fixedly installed on the outer surface of the output end of the motor 302. A side rod 209 is fixedly connected to one side of the outer wall of the output sleeve 208. A guide pin 210 is fixedly connected to the end side wall of the side rod 209. The guide pin 210 is movably inserted into the interior of the arc-shaped guide hole 218.

[0057] See attached document Figure 3 , Figure 4 and Figure 6 The bottom support structure 4 consists of two symmetrically rotatably connected to the bottom outer side of the backrest frame 1. One end of the bottom support structure 4 has a through hole 401 at the top, which is located on the same axis as the rotating hole 104. A transition block 206 is fixedly installed inside the through hole 401. One end of the transition block 206 is fixedly connected to a saw gear 207 on the outer wall of the bottom support structure 4. The other end of the transition block 206 is rotatably connected to a rotating rod 205. A toothed block 217 is fixedly installed at the bottom of the end frame 216, and the toothed block 217 is movably meshed with the saw gear 207. An arc-shaped guide groove 402 is opened at one end of the bottom support structure 4 and at the bottom of the through hole 401. The arc-shaped guide groove 402 is used to limit the rotation range of the backrest frame 1. A guide post 203 is fixedly connected to the bottom outer wall of the support structure 2, and the guide post 203 is movably inserted into the arc-shaped guide groove 402.

[0058] According to the above structure, when the output end of the motor 302 and the rotating rod 205 rotate relative to each other, the backrest frame 1 and the bottom support structure 4 will also rotate relative to each other. At this time, the output sleeve 208 and the side rod 209 will rotate relative to each other with the connecting rod 213. During this process, the guide pin 210 will disengage from the inside of the arc-shaped guide hole 218. At this time, the built-in through rod 214 and the connecting rod 213 will not be blocked by the guide pin 210 and will be pushed by the compression spring 215. Then, the insert rod 212 will quickly retract into the inside of the connecting rod 213, and the abutment block 217 will quickly mesh with the saw gear 207. The guide pin 210 will also move quickly inside the straight guide hole 219. Finally, it can timely limit the relative rotation between the output end of the motor 302 and the rotating rod 205 after the breakage, and stop the relative rotation between the backrest frame 1 and the bottom support structure 4 in time, thereby avoiding the passenger from being injured in the opposite direction when the seat back is damaged.

[0059] See attached document Figure 7 Two bottom support structures 4 are fixedly connected to the inner sides of a crossbeam 6 and an end crossbeam 7. The crossbeam 6 is fixedly connected to the bottom support structure 4 by bolts 603 screwed at both ends. The upper surface of the crossbeam 6 is set as a laying plane 601. The surface of the crossbeam 6 is provided with nail holes 602 that penetrate the crossbeam 6 at equal intervals. The inner wall of the bottom support structure 4 and the upper surface of the laying plane 601 are provided with a bottom frame plate 5. The inner wall of the bottom frame plate 5 is fixedly provided with extension plates 501 at equal intervals. The end of the extension plate 501 is provided with a nail hole 502 that corresponds to the nail hole 602. The bottom frame plate 5 and the crossbeam 6 are fixedly connected by screws that penetrate the nail hole 502 and the nail hole 602.

[0060] According to the above structure, after the bottom support frame 4 and the backrest frame 1 are assembled, the two bottom support frames 4 are fixedly connected by the cross beam 6. Then, the bottom frame plate 5 is laid on the surface of the cross beam 6 and fixed with screws.

[0061] See attached document Figure 8 and Figure 10 Two bottom support structures 4 are fixedly connected to the inner bottom of the two bottom support structures 4, and the bottom of the bottom support structure 4 is provided with a folding plate 404. The end of the folding plate 404 near the arc-shaped guide groove 402 is provided with an inserting groove 403. A limit block 405 and a stop block 406 are fixedly provided on the outer wall of one end of the bottom support structure 4, and the stop block 406 is located above the limit block 405.

[0062] See attached document Figure 8It also includes a back thrust frame 8, two back thrust frames 8 are respectively assembled at the bottom of two bottom support structures 4. One end of the back thrust frame 8 is provided with a support frame 801 for abutting one end of the folding plate 404. A guide rod 802 is fixedly connected to the upper surface of the back thrust frame 8 and to one side of the support frame 801. An insert block 803 is embedded inside the insert groove 403, and the two ends of the insert block 803 are provided with slots 804 for locking the folding plate 404. The two ends of the lower surface of the insert block 803 are fixedly connected with guide sleeves 805, and the guide sleeves 805 are movably sleeved on the outer surface of the guide rod 802. One end of one of the guide sleeves 805 is fixedly connected with a retaining ring 806. A second spring 807 is connected between the retaining ring 806 and the side wall of the support frame 801, and the second spring 807 is sleeved on the outer surface of the guide rod 802 and is in a compressed state.

[0063] See attached document Figure 9 An outer tube 808 is embedded and movably sleeved on the outer surface of the middle part of the guide rod 802, and the outer diameter of the outer tube 808 is the same as the diameter of the guide rod 802. A screw groove 809 is opened on the outer surface of the outer tube 808. A push rod 810 is rotatably connected to the lower surface of the insert block 803, and the end of the push rod 810 is movably inserted into the inside of the screw groove 809.

[0064] According to the above structure, when the bottom support frame 4 and the recoil frame 8 move relative to each other, under the action of inertia, the bottom support frame 4 together with the mounting block 803 will slide forward a short distance along the direction of the guide rod 802. During this process, the end of the abutment rod 810 will slide inside the screw groove 809. At the same time, the outer tube 808 will rotate relative to the guide rod 802. When the abutment rod 810 moves to the end of the screw groove 809, it will move out of the screw groove 809 along the inclined surface at the end of the screw groove 809. At this time, the position of the mounting block 803 on the surface of the guide rod 802 is no longer restricted by the abutment rod 810. Under the action of the compression spring 807, the mounting block 803 and the bottom support frame 4 will quickly rebound. Finally, the bottom support frame 4 together with the backrest frame 1 and the entire seat will quickly move away from the steering wheel.

[0065] See attached document Figure 8 The top of the recoil frame 8 away from the abutment frame 801 is rotatably connected to a spring tube 811, and a spring is provided inside the spring tube 811. A support rod 812 and a limiting rod 813 are fixedly connected to the outer wall of the spring tube 811. The end of the support rod 812 is movably inserted into the inner side of the limiting block 405 and the abutment block 406, and the spring is in a compressed state. The limiting rod 813 is used to limit the rotation angle of the spring tube 811.

[0066] According to the above structure, during the forward sliding of the bottom support frame 4, the end of the support rod 812 will disengage from the inner side of the limiting block 405 and the stop block 406. Then, under the action of the inner coil spring of the coil tube 811, the support rod 812 will rotate, and the limiting rod 813 just restricts the rotation angle of the coil tube 811, thereby releasing the fixed state between the bottom support frame 4 and the recoil frame 8.

[0067] The working principle of this invention is as follows: After the seat frame is assembled, the motor 302 is started, and its output end will drive the rotating rod 205 to rotate. Since the rotating rod 205 is fixedly connected to the backrest frame 1 and the support structure 2, the rotating rod 205 will drive the backrest frame 1 and the support structure 2 to rotate together, thereby changing the angle of the backrest frame 1 and realizing the work of electric adjustment of the backrest angle. During the adjustment process, the guide post 203 will move inside the arc-shaped guide groove 402. The arc-shaped guide groove 402 is set to limit the rotation range of the backrest frame 1.

[0068] When the vehicle is in motion and, due to insufficient braking time, violently impacts another object with its front end, the occupants and backrest frame 1 will continue to move forward due to inertia. At this time, the backrest frame 1 will tend to rotate forward, resulting in relative rotation between the backrest frame 1 and the base support frame 4. During this process, due to excessive impact force, relative rotation will occur between the output end of the motor 302 and the rotating rod 205. Simultaneously, the output sleeve 208, along with the side rod 209, will rotate relative to the connecting rod 213. During this process, the guide pin 210 will disengage from the arc-shaped guide hole 218. At this point, the built-in through rod 214, along with the connecting rod 213, will be unaffected by the guide pin 210. The obstruction is blocked and pushed by the compression spring 215. At this time, the insertion rod 212 will quickly retract into the inside of the live joint rod 213, and the abutment block 217 will quickly mesh with the saw gear 207. The guide pin 210 will also move quickly inside the straight guide hole 219. At this time, it can timely limit the relative rotation between the output end of the motor 302 and the rotating rod 205 after the breakage, and timely stop the relative rotation between the backrest frame 1 and the bottom support frame 4. This will prevent the seat back from injuring the passenger in the opposite direction when it is damaged, further prevent the seat back from deflecting under the action of inertia when a car accident occurs, further prevent the overall deformation of the seat, and prevent the passenger from suffering secondary injury from the seat back in a car accident.

[0069] Similarly, during the violent impact of the vehicle's front end with other objects, under the influence of inertia, the underbody support structure 4 will move relative to the recoil frame 8. At this time, under the influence of inertia, the underbody support structure 4, together with the insert block 803, will slide forward a short distance along the direction of the guide rod 802. During this process, the end of the abutment rod 810 will slide inside the threaded groove 809. At the same time, the outer tube 808 will rotate relative to the guide rod 802. When the abutment rod 810 moves to the end of the threaded groove 809, it will move out of the threaded groove 809 along the inclined surface at the end of the threaded groove 809. At this time, the position of the insert block 803 on the surface of the guide rod 802 is no longer restricted by the abutment rod 810, and is under the compression of the spring. Under the action of spring 807, the bottom support frame 4 will quickly rebound. In addition, during the forward sliding of the bottom support frame 4, the end of the support rod 812 will disengage from the inner side of the limit stop 405 and the stop block 406. Then, under the action of the inner coil spring of the reed tube 811, the support rod 812 will rotate, and the limit rod 813 just limits the rotation angle of the reed tube 811, thereby releasing the fixed state between the bottom support frame 4 and the recoil frame 8. Finally, the bottom support frame 4, together with the backrest frame 1 and the entire seat, will quickly move away from the steering wheel under the action of spring 807, thereby allowing the passenger to quickly move away from the impact point at the front of the vehicle, further reducing the impact force on the passenger in the car accident and minimizing the degree of injury to the passenger in the car accident.

[0070] An installation method for an electric car seat backrest support structure, the specific steps of which are as follows;

[0071] S1: After the backrest frame 1 and the support structure 2 are completed, the backrest frame 1 and the support structure 2 are assembled. First, the bottom end of the backrest frame 1 is inserted into the interior of the support structure 2, and the straight groove frame 204 is aligned with the groove rod hole 103. Then, the rotating rod 205 is inserted into the groove rod hole 103 and the support structure 2, and the rotating rod 205 is welded and fixed to the backrest frame 1 and the support structure 2 respectively.

[0072] S2: Next, the output sleeve 208 is fixedly sleeved on the outer surface of the output end of the motor 302, the rotating rod sleeve 211 is fixedly sleeved on the outer surface of the rotating rod 205, the built-in through rod 214 is passed through the straight slot frame 204 and the live joint frame rod 213 is welded to the other end of the built-in through rod 214. Then, the drive frame rod 3 is installed and the output ends of the motor 302 at both ends of the drive frame rod 3 are fixedly welded to the rotating rod 205. Finally, the insertion rod 212 is inserted into the live joint frame rod 213 and the guide pin 210 is inserted into the arc-shaped guide hole 218.

[0073] S3: Assemble the base support frame 4 and the backrest frame 1. First, connect the adapter block 206 to the end of the rotating rod 205. Then, fix and weld the adapter block 206 inside the through hole 401. Finally, fix and install the saw gear 207 on the end of the adapter block 206 and on the outer wall of the base support frame 4. After the assembly is completed, there is a certain distance between the tooth block 217 and the saw gear 207, and the spring 215 is in a compressed state. Finally, assemble another base support frame 4 according to the same installation method.

[0074] S4: After the bottom support frame 4 and the backrest frame 1 are assembled, the two bottom support frames 4 are fixedly connected by the cross beam 6. Then, the bottom frame plate 5 is laid on the surface of the cross beam 6 and fixed with screws.

[0075] S5: Finally, assemble the bottom frame plate 5 at the bottom of the bottom support structure 4. First, move the insert block 803 along the guide rod 802 and press the second spring 807. Under the elastic force of the second spring 807, the abutment rod 810 will abut against the inside of one end of the screw groove 809, as shown. Figure 9 As shown, the abutment rod 810 is then pressed against the insert block 803 to insert into the insert groove 403, and the abutment frame 801 is pressed against one end of the folding plate 404. At this time, the support rod 812 can be rotated so that its end is pressed between the limit stop block 405 and the abutment block 406. At this time, the coil spring inside the coil tube 811 is in a compressed state. After the bottom frame plate 5 and the bottom support frame 4 are assembled, the bottom frame plate 5 is then assembled with the electric slide for seat sliding.

[0076] The above installation method changes the traditional assembly method of backrest frame 1 and base frame. The combination of bottom support structure 4, cross beam 6 and bottom frame plate 5 replaces the traditional one-piece fixed base structure. This combination can cooperate with the assembly of components such as support structure 2. The seat base assembled by bottom support structure 4, cross beam 6 and bottom frame plate 5 can save the assembly process of traditional hoisting base structure, making the installation of backrest frame 1 simpler and eliminating the need for other hoisting equipment.

[0077] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A support structure for the backrest of an electric car seat, characterized in that: Includes a backrest frame (1), the backrest frame (1) adopts an inverted "U" shaped structure frame, and the bottom of both ends of the backrest frame (1) are provided with rotating holes (104), and the two ends of the backrest frame (1) and above the rotating holes (104) are provided with grooved rod holes (103). A drive frame rod (3) is fixedly installed on the bottom inner side of the backrest frame (1), and motor housings (301) are fixedly installed at both ends of the drive frame rod (3), and a motor (302) is fixedly installed inside the motor housing (301). Support structure (2), two support structures (2) are respectively fixedly installed at the bottom of both ends of the backrest frame (1), the inner wall of the support structure (2) is through and fixedly installed with a straight groove frame (204), and the straight groove frame (204) passes through the groove rod hole (103). The inside of the support structure (2) is through and fixedly connected with a rotating rod (205), and the rotating rod (205) passes through the rotating hole (104) and is fixedly connected with the backrest frame (1). The output end of the motor (302) is fixedly connected to one end of the rotating rod (205). The straight slot frame (204) has an internally inserted through rod (214). Both ends of the internal through rod (214) are fixedly connected to a movable joint rod (213) and an end frame (216), respectively. A plug rod (212) is movably inserted into the bottom of the movable joint rod (213). A rotating rod sleeve (211) is fixedly connected to the bottom end of the plug rod (212), and the rotating rod sleeve (211) is fixedly installed on the outer surface of the rotating rod (205) near the motor (302). A through-hole is formed on the surface of the movable joint rod (213). The connecting rod (213) has an arc-shaped guide hole (218) and a straight guide hole (219), and the straight guide hole (219) is located on one side of the arc-shaped guide hole (218) and communicates with the arc-shaped guide hole (218). An output sleeve (208) is fixedly installed on the outer surface of the output end of the motor (302). A side rod (209) is fixedly connected to one side of the outer wall of the output sleeve (208), and a guide pin (210) is fixedly connected to the end side wall of the side rod (209). The guide pin (210) is movably inserted into the interior of the arc-shaped guide hole (218). The bottom support structure (4) is symmetrically and rotatably connected to the bottom outer side of the backrest frame (1). A through hole (401) is opened at the top of one end of the bottom support structure (4). A transition block (206) is fixedly installed inside the through hole (401). A saw gear (207) is fixedly connected to one end of the transition block (206) on the outer wall of the bottom support structure (4). The other end of the transition block (206) is rotatably connected to the rotating rod (205). A tooth block (217) is fixedly provided at the bottom end of the end frame (216), and the tooth block (217) is movably engaged with the saw gear (207).

2. The automotive electric seat back support structure according to claim 1, characterized in that: The built-in through rod (214) also passes through the groove rod hole (103), and a spring (215) is fixedly connected between the built-in through rod (214) and the inner wall of the groove rod hole (103), and the spring (215) is in a compressed state.

3. The automotive electric seat back support structure according to claim 2, characterized in that: The two support structures (2) are connected by a back-joint frame (201) welded on the back. Both ends of the back-joint frame (201) are welded with support plates (202). The back of the backrest frame (1) is fixedly welded with a horizontal frame (101) at equal intervals. The inner side of the backrest frame (1) is fixedly connected with a mesh frame (102) at equal intervals.

4. The automotive electric seat back support structure according to claim 3, characterized in that: The through hole (401) and the rotating hole (104) are located on the same axis. An arc-shaped guide groove (402) is provided at one end of the bottom support structure (4) and at the bottom of the through hole (401). The arc-shaped guide groove (402) is used to limit the rotation range of the backrest frame (1). A guide post (203) is fixedly connected to the bottom outer wall of the support structure (2), and the guide post (203) is movably inserted into the arc-shaped guide groove (402).

5. The automotive electric seat back support structure according to claim 4, characterized in that: The inner sides of the two bottom support structures (4) are fixedly connected with cross beams (6) and end beams (7), and the cross beams (6) are fixedly connected to the bottom support structures (4) by bolts (603) screwed at both ends. The upper surface of the cross beams (6) is set as a laying plane (601), and the surface of the cross beams (6) is provided with nail holes (602) that penetrate the cross beams (6) at equal intervals.

6. The automotive electric seat back support structure according to claim 5, characterized in that: A bottom frame plate (5) is provided on the inner wall of the bottom support structure (4) and on the upper surface of the laying plane (601). An extension plate (501) is fixedly provided at equal intervals on the inner wall of the bottom frame plate (5). A nail hole (502) corresponding to the nail hole (602) is opened at the end of the extension plate (501). The bottom frame plate (5) and the cross beam (6) are fixedly connected by screws that pass through the nail hole (502) and the nail hole (602).

7. The automotive electric seat back support structure according to claim 6, characterized in that: The inner bottom of the two bottom support structures (4) is fixedly connected with a folding plate (404), and the folding plate (404) is provided with an insert groove (403) at one end near the arc-shaped guide groove (402). A limit block (405) and a stop block (406) are fixedly provided on the outer wall of one end of the bottom support structure (4), and the stop block (406) is located above the limit block (405).

8. The automotive electric seat back support structure according to claim 7, characterized in that: It also includes a back thrust frame (8), two of which are respectively assembled at the bottom of the two bottom support structures (4). One end of the back thrust frame (8) is provided with a stop (801) for abutting against one end of the folding plate (404). A guide rod (802) is fixedly connected to the upper surface of the back thrust frame (8) and to one side of the stop (801). An insert block (803) is embedded inside the insert groove (403), and both ends of the insert block (803) are provided for locking the folding plate (404). 4) The slot (804) of the insert block (803) has guide sleeves (805) fixedly connected to both ends of the lower surface, and the guide sleeves (805) are all movably sleeved on the outer surface of the guide rod (802). One end of one of the guide sleeves (805) is fixedly connected to a retaining ring (806). A second spring (807) is connected between the retaining ring (806) and the side wall of the abutment (801), and the second spring (807) is sleeved on the outer surface of the guide rod (802) and is in a compressed state.

9. The automotive electric seat back support structure according to claim 8, characterized in that: The outer tube (808) is embedded and movably sleeved on the outer surface of the middle part of the guide rod (802), and the outer diameter of the outer tube (808) is the same as the diameter of the guide rod (802). The outer surface of the outer tube (808) is provided with a threaded groove (809). The lower surface of the insert block (803) is rotatably connected with a stop rod (810), and the end of the stop rod (810) is movably inserted into the inside of the threaded groove (809). The top of the recoil frame (8) away from the abutment frame (801) is rotatably connected to a spring tube (811), and a spring is provided inside the spring tube (811). A support rod (812) and a limiting rod (813) are fixedly connected to the outer wall of the spring tube (811). The end of the support rod (812) is movably inserted into the inner side of the limiting block (405) and the abutment block (406), and the spring tube (811) is in a compressed state. The limiting rod (813) is used to limit the rotation angle of the spring tube (811).

10. A method for installing an electric car seat backrest support structure, used to install the electric car seat backrest support structure as described in claim 9, characterized in that, The specific steps are as follows: S1: After the backrest frame (1) and the support structure (2) are completed, the backrest frame (1) and the support structure (2) are assembled. First, the bottom end of the backrest frame (1) is inserted into the inside of the support structure (2), and the straight groove frame (204) is aligned with the groove rod hole (103). Then, the rotating rod (205) is inserted into the groove rod hole (103) and the support structure (2), and the rotating rod (205) is welded and fixed to the backrest frame (1) and the support structure (2) respectively. S2: Next, the output sleeve (208) is fixedly sleeved on the outer surface of the output end of the motor (302), the rotating rod sleeve (211) is fixedly sleeved on the outer surface of the rotating rod (205), the built-in through rod (214) is passed through the straight slot frame (204), and the live joint frame rod (213) is welded to the other end of the built-in through rod (214). Then, the drive frame rod (3) is installed and the output ends of the motor (302) at both ends of the drive frame rod (3) are fixedly welded to the rotating rod (205). Finally, the insert rod (212) is inserted into the live joint frame rod (213), and the guide pin (210) is inserted into the arc-shaped guide hole (218). S3: Assemble the bottom support frame (4) and the backrest frame (1). First, connect the adapter block (206) to the end of the rotating rod (205). Then, fix the adapter block (206) inside the through hole (401). Finally, fix the saw gear (207) to the end of the adapter block (206) and the outer wall of the bottom support frame (4). After the assembly is completed, there is a certain distance between the tooth block (217) and the saw gear (207), and the spring (215) is in a compressed state. Finally, assemble another bottom support frame (4) according to the same installation method. S4: After the bottom support structure (4) and the backrest frame (1) are assembled, the two bottom support structures (4) are fixedly connected by the cross beam (6). Then, the bottom frame plate (5) is laid on the surface of the cross beam (6) and fixed with screws. S5: Finally, assemble the bottom frame plate (5) at the bottom of the bottom support structure (4). First, move the insert block (803) along the guide rod (802) and squeeze the second spring (807). Under the elastic force of the second spring (807), the abutment rod (810) will abut against the inside of one end of the screw groove (809). Then, the abutment rod (810) will abut against the insert block (803) and insert the insert groove (403) into the insert groove (403) and abut the abutment frame (801) will abut against one end of the folding plate (404). At this time, rotate the support rod (812) so that its end abuts against the limit block (405) and the abutment block (406). At this time, the coil spring inside the coil tube (811) is in a compressed state. After the bottom frame plate (5) and the bottom support structure (4) are assembled, the bottom frame plate (5) can be assembled with the electric slide for seat sliding.

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