An easily detachable car seat back fixing buckle

Abstract

The application discloses a detachable automobile seat backrest fixing buckle, and relates to the automobile field. The detachable automobile seat backrest fixing buckle comprises a first lock shell, a second lock shell is arranged on one side of the first lock shell, a hollow shaft is arranged in the first lock shell and matched with the second lock shell, a first lock leaf and a second lock leaf are sequentially arranged on the outside of the hollow shaft, a rhombic block matched with the first lock leaf and the second lock leaf is arranged at the middle position of the strip-shaped through hole, the middle part of the rhombic block is connected with the first lock shell and the second lock shell through a first connecting shaft, an adjusting assembly matched with the first lock shell and the second lock shell is arranged on one side of the top of the rhombic block, a cable is arranged on one side of the top end of the adjusting assembly, and an operation part matched with the first lock shell is arranged on the top end of the cable. Under the action of the adjusting assembly, the detachable automobile seat backrest fixing buckle adopts a more simplified and intuitive design, the number of parts and mechanical connections are reduced, the production cost is lowered, and the maintenance and maintenance process is simplified.

Description

Technical Field

[0001] This invention relates to the automotive field, and more specifically, to an easily detachable car seat backrest fixing clip. Background Technology

[0002] With the increasing popularity of automobiles, people are placing higher demands on the comfort of car use, while ensuring safety. This demand is particularly evident in the rear seats, which are typically designed as two or more seats with backrests connected to the vehicle body and secured by a mechanism called a backrest lock. When it's necessary to expand the car's interior space to accommodate more items, the backrest lock can be activated to fold the seat backs forward, significantly increasing usable interior space. However, existing rear seat backrest lock designs have some shortcomings.

[0003] First, in existing technologies, the design of backrest locks is often overly complex, involving numerous parts and mechanical connections. This not only increases manufacturing costs but also makes repair and maintenance more difficult. In practical use, this means that if a part malfunctions or is damaged, replacement will be very difficult and time-consuming, increasing maintenance costs and difficulties for both car manufacturers and owners.

[0004] Secondly, due to the possible small gaps or looseness between the backrest locking components, noise can easily be generated due to vibration during vehicle operation, especially on bumpy or uneven roads. This noise not only affects the passenger's comfort experience but may also cause discomfort or fatigue during long-distance driving, which will reduce the willingness of consumers who pursue a high-quality driving experience to purchase.

[0005] Furthermore, once the internal parts of the backrest lock are damaged, they are quite troublesome to replace due to their complexity. This is not only time-consuming and labor-intensive, but may also lead to additional repair costs, which is an additional financial burden for car owners and may also affect the normal use of the vehicle.

[0006] No effective solutions have yet been proposed to address the problems in the relevant technologies. Summary of the Invention

[0007] In view of the problems in the related technologies, the present invention proposes an easily detachable car seat back fixing buckle to overcome the above-mentioned technical problems existing in the existing related technologies.

[0008] Therefore, the specific technical solution adopted by the present invention is as follows:

[0009] A removable car seat backrest fastener includes a first locking housing, with a cooperating second locking housing on one side. The first locking housing contains a hollow shaft that mates with the second locking housing. A first locking leaf and a second locking leaf are sequentially fitted onto the outer side of the hollow shaft, forming a strip-shaped through hole between them. A rhomboid block, cooperating with the first and second locking leaves, is positioned in the middle of the strip-shaped through hole. The center of the rhomboid block is connected to the first and second locking housings via a first connecting shaft. An adjusting component, cooperating with the first and second locking housings, is located on the top side of the rhomboid block. A pull cable is located on the top side of the adjusting component, and the top of the pull cable is connected to the first locking housing. An operating part is provided to cooperate with a lock housing, and one side of the bottom end of the operating part cooperates with the first lock housing and the second lock housing; a torsion spring is sleeved at the middle position of the outer side of the hollow shaft to cooperate with the first lock leaf and the second lock leaf, and both ends of the torsion spring cooperate with the first lock leaf and the second lock leaf through torsion spring hooks; a shell locking block is provided at the middle position of the top of the first lock housing, and a shell locking groove is provided on the outer side of the shell locking block, and the shell locking groove is located at the middle position of the top of the second lock housing; a buffer groove is provided on one side of the surface of the first lock housing, and a buffer pad is provided on one side of the buffer groove; a buffer pad locking groove is opened on the surface of the buffer groove, and a buffer pad locking block that cooperates with the buffer pad is provided inside the buffer pad locking groove.

[0010] Furthermore, in order to ensure the stable movement of the adjustment component under the action of the lever groove, and to ensure the stable movement of the cable under the action of the cable slot, a lever groove that cooperates with the adjustment component is provided on one side of the top of the first lock housing, and a cable slot that cooperates with the top of the first lock housing is provided on one side of the lever groove, and the inside of the cable slot cooperates with the cable.

[0011] Furthermore, in order to ensure the stability of the hollow shaft under the action of the hollow shaft end cap and to facilitate the disassembly of the hollow shaft, the connecting shaft end cap is provided at both ends of the hollow shaft to cooperate with the first lock shell and the second lock shell; and a connecting shaft end cap that cooperates with the first lock shell is provided at one end of the first connecting shaft.

[0012] Furthermore, in order to ensure the stability of the connection between the adjustment component and the diamond block under the action of the cable core slot, thereby ensuring that the adjustment component can operate stably, a cable core slot that cooperates with the adjustment component is provided on one side of the diamond block.

[0013] Furthermore, to achieve the desired effect with the adjustment component, this invention employs a more simplified and intuitive design, reducing the number of parts and mechanical connections. This not only lowers production costs but also significantly simplifies the repair and maintenance process, making component replacement quicker and more convenient even in the event of damage. The adjustment component includes a connecting cable disposed inside the cable core slot. A first gear rod is positioned at the top of the connecting cable, and a meshing second gear rod is positioned on one side of the first gear rod, with the top side of the second gear rod engaging with the cable. The second gear rod is positioned away from the first gear rod. A lever is provided on the side, and the top of the lever engages with the lever groove. The lever, the first gear rod, and the second gear rod are all connected to the first lock housing and the second lock housing via the second connecting shaft. A return spring is provided at the end of the second gear rod away from the first gear rod. A return spring catch block is provided at one end of the return spring to engage with the inner wall of the first lock housing. A limiting groove is provided on one side of the lever to engage with the second gear rod. Several gear teeth are provided on the meshing side of the second gear rod and the first gear rod, and the transmission ratio of the gear teeth of the second gear rod to the gear teeth of the first gear rod is 2:1.

[0014] Furthermore, in order to enable the adjustment assembly to be driven by the cable under the action of the operating unit, and to drive the diamond block to open and close the first and second locking leaves, thereby realizing the locking and unlocking of the car seat back fixing buckle, which is labor-saving and easy to control, and reduces production costs, the operating unit includes an unlocking handle base set on one side of the top of the first and second lock housings, an unlocking handle is set on the top of the unlocking handle base, and a connecting seat that cooperates with the cable is set at the bottom of the unlocking handle.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. Under the action of the operating part, the present invention drives the adjustment component through the cable, and drives the diamond block to open and close the first locking leaf and the second locking leaf, thereby realizing the locking and unlocking of the car seat back fixing buckle. It is labor-saving and easy to control, and reduces the production cost.

[0017] 2. Compared with existing complex backrest locks, this invention adopts a more simplified and intuitive design with the help of the adjustment components, reducing the number of parts and mechanical connections. This not only reduces production costs but also greatly simplifies the repair and maintenance process, making it faster and more convenient to replace parts even when damage occurs. Due to the compact structure, the gaps and looseness between parts are greatly reduced.

[0018] 3. During vehicle operation, especially on uneven roads, this invention can significantly reduce noise caused by vibration, improve passenger comfort, and reduce interference during driving. The lever slot ensures stable movement of the adjustment component, while the cable slot ensures stable movement of the cable.

[0019] 4. The present invention ensures the stability of the connection between the adjustment component and the diamond block under the action of the cable core slot, thereby ensuring that the adjustment component can operate stably; under the action of the hollow shaft end cover, the stability of the hollow shaft is ensured, and the disassembly of the hollow shaft is also facilitated; under the action of the connecting shaft end cover, the stability of the first connecting shaft is ensured, and the disassembly of the first connecting shaft is also facilitated. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of an easily detachable car seat back fixing buckle according to an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0023] Figure 3 This is a schematic diagram of the locking structure of an easily detachable car seat back fixing buckle according to an embodiment of the present invention;

[0024] Figure 4 yes Figure 3 A magnified view of a section at point B in the middle;

[0025] Figure 5 yes Figure 3 A magnified view of a section at point C;

[0026] Figure 6 This is a schematic diagram of the buckle unlocking structure of an easily detachable car seat back fixing buckle according to an embodiment of the present invention;

[0027] Figure 7 yes Figure 6 A magnified view of a section at point D;

[0028] Figure 8 This is a schematic diagram of the internal structure of the first and second lock housings in an easily detachable car seat back fixing buckle according to an embodiment of the present invention.

[0029] Figure 9 This is a schematic diagram of the structure of the first locking shell in an easily detachable car seat back fixing buckle according to an embodiment of the present invention.

[0030] In the diagram: 1. First lock housing; 2. Second lock housing; 3. Hollow shaft; 4. First lock leaf; 5. Second lock leaf; 6. Strip-shaped through hole; 7. Diamond block; 701. Cable core slot; 8. First connecting shaft; 9. Adjustment assembly; 901. Connecting cable; 902. First gear rod; 903. Second gear rod; 904. Toggle block; 905. Second connecting shaft; 906. Return spring; 907. Return spring retainer; 908. 10. Limiting slot; 11. Cable; 12. Operating unit; 13. Unlocking handle base; 14. Unlocking handle; 15. Connecting seat; 16. Torsion spring; 17. Torsion spring hook; 18. Outer shell locking block; 19. Outer shell locking slot; 20. Buffer slot pad; 21. Buffer pad locking slot; 22. Buffer pad locking block; 23. Lever slot; 24. Cable locking slot; 25. Hollow shaft end cover; 26. Connecting shaft end cover. Detailed Implementation

[0031] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0032] According to an embodiment of the present invention, an easily detachable car seat backrest fixing clip is provided.

[0033] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-9As shown, the easily detachable car seat back fixing buckle according to an embodiment of the present invention includes a first locking shell 1, a cooperating second locking shell 2 provided on one side of the first locking shell 1, a hollow shaft 3 provided inside the first locking shell 1 that cooperates with the second locking shell 2, a first locking leaf 4 and a second locking leaf 5 sequentially sleeved on the outer side of the hollow shaft 3, and a strip-shaped through hole 6 formed between the first locking leaf 4 and the second locking leaf 5, a rhomboid block 7 provided in the middle of the strip-shaped through hole 6 that cooperates with the first locking leaf 4 and the second locking leaf 5, the middle part of the rhomboid block 7 being connected to the first locking shell 1 and the second locking shell 2 via a first connecting shaft 8; an adjustment component 9 cooperating with the first locking shell 1 and the second locking shell 2 is provided on the top side of the rhomboid block 7, a pull cable 10 is provided on the top side of the adjustment component 9, an operating part 11 cooperating with the first locking shell 1 is provided on the top of the pull cable 10, and the bottom side of the operating part 11 is connected to the first locking shell 1 and the second locking shell 2. 2. A torsion spring 12 is fitted on the outer middle position of the hollow shaft 3 to cooperate with the first locking leaf 4 and the second locking leaf 5. Both ends of the torsion spring 12 are connected to the first locking leaf 4 and the second locking leaf 5 through torsion spring hooks 13. A shell locking block 14 is provided at the middle position of the top of the first lock shell 1. A shell locking groove 15 is provided on the outer side of the shell locking block 14, and the shell locking groove 15 is located at the middle position of the top of the second lock shell 2. A buffer groove 16 is provided on one side of the surface of the first lock shell 1, and a buffer pad 17 is provided on one side of the buffer groove 16 (in addition, in specific applications, the end of the buffer pad 17 that contacts the latch is made into a buffer pad arc groove, which is slightly longer than the arc groove at one end of the first lock shell 1 and the second lock shell 2 to realize the buffer function when the latch is locked). A buffer pad slot 18 is opened on the surface of the buffer groove 16, and a buffer pad block 19 that cooperates with the buffer pad 17 is provided inside the buffer pad slot 18.

[0034] By means of the above technical solution, under the action of the operating part 11, the present invention drives the adjusting component 9 through the cable 10, and drives the diamond block 7 to open and close the first locking leaf 4 and the second locking leaf 5, thereby realizing the locking and unlocking of the car seat back fixing buckle. This is labor-saving and easy to control, reducing production costs. Compared with the existing complex backrest locks, under the action of the adjusting component 9, the present invention adopts a more simplified and intuitive design, reducing the number of parts and mechanical connections. This not only reduces production costs but also greatly simplifies the maintenance process, making it faster and more convenient to replace parts even when damage occurs. Due to the compact structure, the gaps and looseness between parts are greatly reduced. During vehicle operation, especially on uneven roads, the present invention can significantly reduce noise caused by vibration, improve passenger comfort, and reduce interference during driving.

[0035] In one embodiment, for the first lock housing 1, a lever groove 20 that cooperates with the adjusting component 9 is provided on one side of the top of the first lock housing 1. A cable slot 21 that cooperates with the top of the first lock housing 1 is provided on one side of the lever groove 20 (the opening diameter of the cable slot 21 is larger than the diameter of the cable 10, and ensures that the cable 10 can operate stably). The inside of the cable slot 21 cooperates with the cable 10, thereby ensuring that the adjusting component can move stably under the action of the lever groove 20, and ensuring the stable movement of the cable under the action of the cable slot 21.

[0036] In one embodiment, for the hollow shaft 3, both ends of the hollow shaft 3 are provided with hollow shaft end caps 22 that cooperate with the first lock shell 1 and the second lock shell 2 (in addition, the other end of the hollow shaft 3 is threaded, and the hollow shaft end cap 22 that cooperates with it is threaded internally; the two cooperate with each other to achieve the engagement of the first lock shell 1 and the second lock shell 2, and at the same time facilitate disassembly); one end of the first connecting shaft 8 is provided with a connecting shaft end cap 23 that cooperates with the first lock shell 1, thereby ensuring the stability of the hollow shaft 3 under the action of the hollow shaft end cap 22, and facilitating the disassembly of the hollow shaft 3; and ensuring the stability of the first connecting shaft 8 under the action of the connecting shaft end cap 23, and facilitating the disassembly of the first connecting shaft 8.

[0037] In one embodiment, for the aforementioned rhombus block 7, a cable core slot 701 is provided on one side of the rhombus block 7 to cooperate with the adjustment component 9. Under the action of the cable core slot 701, the connection between the adjustment component 9 and the rhombus block 7 is ensured to be stable, thereby ensuring that the adjustment component 9 can operate stably.

[0038] In one embodiment, the adjustment component 9 includes a connecting cable 901 disposed inside the cable core slot 701. A first gear rod 902 is disposed at the top of the connecting cable 901, and a second gear rod 903 meshing with it is disposed on one side of the first gear rod 902. The top of the second gear rod 903 engages with the cable 10. A lever 904 is disposed on the side of the second gear rod 903 away from the first gear rod 902, and the top of the lever 904 engages with the lever slot 20. The lever 904, the first gear rod 902, and the second gear rod 903 are all connected to the first lock housing 1 and the second lock housing 2 via a second connecting shaft 905. The second gear rod 903 is located away from the first gear rod 902. One end of the 02 is provided with a return spring 906, and one end of the return spring 906 is provided with a return spring block 907 that cooperates with the inner wall of the first lock housing 1. A limiting groove 908 that cooperates with the second gear rod 903 is opened on one side of the lever block 904. The side of the second gear rod 903 that meshes with the first gear rod 902 is provided with several gear teeth, and the transmission ratio of the gear teeth of the second gear rod 903 to the gear teeth of the first gear rod 902 is 2:1. Thus, under the action of the adjusting component 9, the present invention adopts a more simplified and intuitive design, reduces the number of parts and mechanical connections, not only reduces production costs, but also greatly simplifies the repair and maintenance process, making it faster and more convenient to replace parts even when damage occurs.

[0039] The working principle of the adjustment component 9 is as follows: When the car seat back fixing buckle is unlocked, the cable 10 moves upward under the control of the operating part 11, which drives one end of the second gear rod 903 to rotate clockwise under the action of the second connecting shaft 905. Through several gear teeth on one side, the first gear rod 902, which is meshed with it, rotates counterclockwise under the action of the second connecting shaft 905. During the rotation of the first gear rod 902, the connecting cable 901 moves upward, and under the action of the cable core slot 701, the diamond block 7 rotates counterclockwise.

[0040] To restore the locked state, simply turn the lever 904 of the adjustment component 9 counterclockwise. With the cooperation of the lever groove 20, the lever 904 compresses the reset spring 906 during the counterclockwise rotation, causing the limit slot 908 to separate from one end of the second gear lever 903, thus releasing the lock of the car seat back fixing buckle.

[0041] In one embodiment, the operating unit 11 includes an unlocking handle base 1101 disposed on one side of the top of the first lock housing 1 and the second lock housing 2, an unlocking handle 1102 disposed on the top of the unlocking handle base 1101, and a connecting seat 1103 (made of...) cooperating with the cable 10 disposed at the bottom end of the unlocking handle 1102. Figure 5 and Figure 7 It is known that the bottom of the connecting seat 1103 is provided with a movable shaft that cooperates with the cable 10, thereby ensuring that the cable 10 can slide stably (existing technology, which will not be described in detail here). Under the action of the operating part 11, the cable 10 drives the adjusting component 9, which in turn drives the diamond block 7 to rotate around the first connecting shaft 8, and drives the opening and closing of the first locking leaf 4 and the second locking leaf 5, thereby realizing the locking and unlocking of the car seat back fixing buckle. It is labor-saving and easy to control, reducing production costs.

[0042] The working principle of the operating unit 11 is as follows: By pressing the unlocking handle 1102 of the operating unit 11, the unlocking handle 1102 will rotate clockwise in the unlocking handle base 1101, thereby driving the bottom cable 10 to move upward through the connecting seat 1103 during the clockwise rotation.

[0043] To facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process will be described in detail below.

[0044] In practical applications, when the car seat back fixing buckle needs to be locked, the first locking leaf 4 and the second locking leaf 5 close and lock under the force of the torsion spring 12. At the same time, they are kept in a horizontal position under the restriction of the position of the diamond block 7. The locking hook ends of the first locking leaf 4 and the second locking leaf 5 cooperate with the arc groove at one end of the first lock housing 1 and the second lock housing 2 to form a latch slot. The rear seat back of the car is then locked to the car body by the latch rigidly connected to the car seat back fixing buckle, thus fixing the rear seat.

[0045] When the car seat backrest fixing buckle is unlocked, pressing the operating part 11 causes the bottom-connected cable 10 to move upward inside the cable slot 21, thereby causing the adjusting component 9 to move upward and causing the diamond block 7 to rotate counterclockwise under the action of the first connecting shaft 8. The two ends of the diamond block 7 respectively squeeze the first locking leaf 4 and the second locking leaf 5. At this time, the first locking leaf 4 and the second locking leaf 5 overcome the tension of the torsion spring 12 and are in an open state. When the first locking leaf 4 and the second locking leaf 5 reach the unlocking limit position, they will be locked by the action of the adjusting component 9, so that the first locking leaf 4 and the second locking leaf 5 are in an unlocked state, which makes it easy for the rear seat of the car to be released from the latch, realizing the function of the rear seat backrest folding forward, thereby increasing the interior space of the car. To restore the locked state, simply move the adjusting component 9. With the cooperation of the lever slot 20, the adjusting component 9 is used to release the locking of the car seat backrest fixing buckle.

[0046] The working principle of adjustment component 9 and operation unit 11 is as described above.

[0047] In summary, by means of the above-mentioned technical solution of the present invention, under the action of the operating part 11, the present invention drives the adjusting component 9 through the cable 10, and drives the diamond block 7 to open and close the first locking leaf 4 and the second locking leaf 5, thereby realizing the locking and unlocking of the car seat back fixing buckle. This is labor-saving, easy to control, and reduces production costs. Compared with the existing complex backrest locks, under the action of the adjusting component 9, the present invention adopts a more simplified and intuitive design, reducing the number of parts and mechanical connections. This not only reduces production costs but also greatly simplifies the repair and maintenance process, making it faster and more convenient to replace parts even when damage occurs. Due to the compact structure, the gaps and looseness between parts are greatly reduced. During vehicle operation, especially on uneven roads, it can significantly reduce noise caused by vibration, improve passenger comfort, and reduce interference during driving. The lever slot 20 ensures stable movement of the adjustment component, while the cable slot 21 ensures stable movement of the cable. The cable core slot 701 ensures stable connection between the adjustment component 9 and the rhombus block 7, thus ensuring stable operation of the adjustment component 9. The hollow shaft end cover 22 ensures the stability of the hollow shaft 3 and facilitates its disassembly. The connecting shaft end cover 23 ensures the stability of the first connecting shaft 8 and facilitates its disassembly.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An easily detachable car seat backrest fixing buckle, comprising a first locking housing (1), wherein a cooperating second locking housing (2) is provided on one side of the first locking housing (1), characterized in that, The first lock housing (1) is provided with a hollow shaft (3) that cooperates with the second lock housing (2). The outer side of the hollow shaft (3) is provided with a first lock leaf (4) and a second lock leaf (5) in sequence, and a strip-shaped through hole (6) is formed between the first lock leaf (4) and the second lock leaf (5). A rhomboid block (7) that cooperates with the first lock leaf (4) and the second lock leaf (5) is provided in the middle of the strip-shaped through hole (6). The middle part of the rhomboid block (7) is connected to the first lock housing (1) and the second lock housing (2) through a first connecting shaft (8). The top side of the rhombus block (7) is provided with an adjustment component (9) that cooperates with the first lock shell (1) and the second lock shell (2), and a cable core slot (701) that cooperates with the adjustment component (9) is opened on one side of the rhombus block (7). A cable (10) is provided on one side of the top of the adjustment component (9). An operating part (11) that cooperates with the first lock shell (1) is provided on the top of the cable (10), and one side of the bottom of the operating part (11) cooperates with the first lock shell (1) and the second lock shell (2). A torsion spring (12) is sleeved on the outer middle position of the hollow shaft (3) to cooperate with the first locking leaf (4) and the second locking leaf (5). Both ends of the torsion spring (12) are connected to the first locking leaf (4) and the second locking leaf (5) through torsion spring hooks (13). The adjustment component (9) includes a connecting cable (901) disposed inside the cable core slot (701), a first gear rod (902) is provided at the top of the connecting cable (901), a second gear rod (903) is provided on one side of the first gear rod (902) and the top side of the second gear rod (903) cooperates with the cable (10); A lever (904) is provided on the side of the second gear lever (903) away from the first gear lever (902), and the top of the lever (904) cooperates with the lever groove (20). The lever (904), the first gear lever (902) and the second gear lever (903) are all connected to the first lock housing (1) and the second lock housing (2) through the second connecting shaft (905). The second gear lever (903) is provided with a return spring (906) at the end away from the first gear lever (902), and a return spring block (907) is provided at one end of the return spring (906) to cooperate with the inner wall of the first lock shell (1).

2. The easily detachable car seat backrest fixing buckle according to claim 1, characterized in that, The first lock shell (1) has a shell locking block (14) at the top center position, and a matching shell locking groove (15) is provided on the outer side of the shell locking block (14), and the shell locking groove (15) is located at the top center position of the second lock shell (2).

3. The easily detachable car seat backrest fixing buckle according to claim 2, characterized in that, A buffer groove (16) is provided on one side of the surface of the first lock shell (1), and a buffer pad (17) is provided on one side of the buffer groove (16). The surface of the buffer pad (16) is provided with a buffer pad slot (18), and the inside of the buffer pad slot (18) is provided with a buffer pad block (19) that cooperates with the buffer pad (17).

4. The easily detachable car seat backrest fixing buckle according to claim 1, characterized in that, The top side of the first lock housing (1) is provided with a lever groove (20) that cooperates with the adjustment component (9). The side of the lever groove (20) is provided with a cable slot (21) that cooperates with the top of the first lock housing (1), and the inside of the cable slot (21) cooperates with the cable (10).

5. The easily detachable car seat backrest fixing buckle according to claim 1, characterized in that, Both ends of the hollow shaft (3) are provided with hollow shaft end caps (22) that cooperate with the first lock shell (1) and the second lock shell (2). One end of the first connecting shaft (8) is provided with a connecting shaft end cap (23) that cooperates with the first lock shell (1).

6. The easily detachable car seat backrest fixing buckle according to claim 1, characterized in that, The push block (904) has a limiting groove (908) on one side that cooperates with the second gear rod (903).

7. A car seat backrest fixing buckle that is easy to disassemble according to claim 6, characterized in that, The second gear rod (903) and the first gear rod (902) are provided with a number of gear teeth on the meshing side, and the transmission ratio of the gear teeth of the second gear rod (903) to the gear teeth of the first gear rod (902) is 2:

1.

8. The easily detachable car seat backrest fixing buckle according to claim 1, characterized in that, The operating part (11) includes an unlocking handle base (1101) disposed on one side of the top of the first lock shell (1) and the second lock shell (2), an unlocking handle (1102) is disposed on the top of the unlocking handle base (1101), and a connecting seat (1103) that cooperates with the cable (10) is disposed at the bottom of the unlocking handle (1102).

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