Automobile backrest buckle convenient to disassemble

Abstract

The utility model relates to the technical field of automobile parts, and discloses an automobile backrest buckle convenient to disassemble, which comprises a fixing assembly, a fixing piece, an extrusion rod, a connecting strip, an extrusion block, a fixing block and a first spring, and the limiting assembly is arranged at one end of the connecting strip and comprises a limiting piece, the limiting piece comprises two pressing rods, two fluted discs, two tooth sleeves, a rotating disc and a sliding rod, the two pressing rods are both arranged at one end of the extrusion rod, the two fluted discs are both arranged on one side of the connecting strip, and the two tooth sleeves are both arranged on one side of the fluted discs. The backrest fixing device has the advantages that the limiting mechanism is additionally arranged on the basis of the buckle, the backrest is further fixed, the backrest can be fixed from different angles and positions, and the possibility of loosening or displacement of the backrest in the using process is greatly reduced. The stable position of the backrest can be kept no matter on a bumpy road surface in the running process of a vehicle or under the pressure generated when a passenger leans against the vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive parts, in particular to an automobile backrest buckle that is convenient to disassemble. Background Art

[0002] An automobile backrest usually consists of a frame, a filler and an outer cover, which provides body support for the driver and passengers. The frame is generally made of metal or high-strength plastic to provide a support structure for the backrest. The backrest buckle ensures that the backrest of the car seat will not loosen or shift during use, providing stable support for the driver and passengers. In the prior art, when fixing the backrest to one side of the seat, the buckle method is usually used. During long-term use, the buckle may become loose due to frequent stress and vibration. For example, when the vehicle passes through a bumpy road during driving, the connection part of the buckle may produce a small displacement. Over time, this displacement may gradually increase, resulting in the backrest not being firmly fixed. Summary of the Utility Model

[0003] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Simplifications or omissions may be made in this part, as well as in the abstract and the title of the application of this application, to avoid obscuring the purpose of this part, the abstract and the title of the utility model. However, such simplifications or omissions shall not be used to limit the scope of the utility model.

[0004] In view of the above and / or existing problems in the automobile backrest buckle that is convenient to disassemble, the present utility model is proposed.

[0005] Therefore, the problem to be solved by the present utility model is that the buckle will become loose due to frequent stress and vibration during long-term use.

[0006] To solve the above technical problems, the present utility model provides the following technical solution: an automobile backrest buckle that is convenient to disassemble, which includes a fixing component, including a fixing piece, including a pressing rod, a connecting strip, a pressing block, a fixing block and a first spring. The number of the connecting strips is two, both are arranged at the bottom of the pressing rod. The number of the pressing rods is two, both are arranged at the top of the connecting strip. The number of the pressing blocks is four, all are arranged on both sides of the connecting strip. The number of the fixing blocks is four, all are fixed on the top of the pressing block. The number of the first springs is two, both are arranged at one end of the fixing block.

[0007] The limiting component is arranged at one end of the connecting bar and includes a limiting member, which includes a pressing rod, a toothed disc, a toothed sleeve, a turntable and a sliding rod. The number of the pressing rods is two, and both are arranged at one end of the extrusion rod. The number of the toothed discs is two, and both are arranged on one side of the connecting bar. The number of the toothed sleeves is two, and both are arranged on one side of the toothed disc. The toothed sleeve is meshed with the toothed disc. The number of the turntables is two, and both are arranged at one end of the toothed sleeve. Six sliding grooves are formed in the inner wall of the turntable, and the number of the sliding rods is twelve, and all are arranged to slide on the inner wall of the sliding groove.

[0008] As a preferred scheme of the detachable car backrest buckle of the present utility model, wherein: a sleeve is sleeved outside the extrusion rod, a fixed shell is sleeved outside the connecting bar, a second spring is arranged at the bottom of the extrusion rod, and the number of the second springs is two, one end of each is fixed to the bottom of the extrusion rod, and the other end is fixed to the top of the fixed shell.

[0009] As a preferred scheme of the detachable car backrest buckle of the present utility model, wherein: a clamping groove corresponding to the extrusion block is formed in the fixed shell, and the extrusion block is arranged to slide on the inner wall of the clamping groove.

[0010] As a preferred scheme of the detachable car backrest buckle of the present utility model, wherein: two extrusion strips are arranged at one end of the connecting bar, and both are arranged at one end of the connecting bar, and the extrusion strip is provided with a toothed disc.

[0011] As a preferred scheme of the detachable car backrest buckle of the present utility model, wherein: a toothed ring is sleeved outside the pressing rod, a limiting groove is formed in the inner wall of the pressing rod, a fixed shaft is inserted into the inner wall of the limiting groove, a limiting plate is sleeved outside the fixed shaft, the fixed shaft is movably connected with the limiting plate, a third spring is arranged at the bottom of the limiting plate, and the number of the third springs is two, one end of each is fixed to the inner wall of the limiting groove, and the other end is fixed to the bottom of the limiting plate.

[0012] As a preferred scheme of the detachable car backrest buckle of the present utility model, wherein: a chuck is arranged at one end of the toothed ring, the number of the chucks is two, and both are arranged at one end of the toothed ring, and an activity groove corresponding to the pressing rod is formed in the inner wall of the chuck.

[0013] As a preferred scheme of the detachable car backrest buckle of the present utility model, wherein: a fixed disc is arranged at one end of the turntable, the number of the fixed discs is two, fixed grooves corresponding to the sliding rods are formed in the inner walls of the fixed discs, the sliding rods are arranged to slide on the inner walls of the fixed grooves, a clamping block is arranged at the top of the sliding rod, and the number of the clamping blocks is six, and all are arranged at the top of the sliding rod.

[0014] As a preferred embodiment of the detachable car backrest buckle of the present utility model, the following is provided: the fixed shell is further provided with a driving groove corresponding to the clamping block, and the clamping block is located on the inner wall of the driving groove and slides thereon.

[0015] As a preferred embodiment of the detachable car backrest buckle of the present utility model, the following is provided: it further includes a main body assembly, including a car seat, a seat backrest, and seat armrests. The seat backrest is disposed on one side of the car seat, the car seat is disposed on one side of the seat backrest, and the number of seat armrests is two, both of which are disposed on one side of the car seat.

[0016] As a preferred embodiment of the detachable car backrest buckle of the present utility model, the following is provided: a sliding groove corresponding to the clamping block is provided on the inner wall of the car seat.

[0017] The beneficial effect of the present utility model is that a limiting mechanism is added on the basis of the buckle to further fix the backrest, and the backrest can be fixed from different angles and positions, greatly reducing the possibility of the backrest loosening or displacing during use. Whether on a bumpy road during vehicle driving or under the pressure generated when a passenger leans on it, the backrest can maintain a stable position. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0019] Figure 1 It is the overall structure diagram of the detachable car backrest buckle.

[0020] Figure 2 It is the structure diagram of the car seat of the detachable car backrest buckle.

[0021] Figure 3 It is the structure diagram of the first spring of the detachable car backrest buckle.

[0022] Figure 4 For the detachable car backrest buckle Figure 3 The partial enlarged structure diagram at A.

[0023] Figure 5 It is the structure diagram of the driving groove of the detachable car backrest buckle.

[0024] Figure 6 It is the structure diagram of the connecting strip of the detachable car backrest buckle.

[0025] Figure 7 Structural diagram of the turntable of a car backrest buckle for easy disassembly. Specific embodiments

[0026] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings of the specification.

[0027] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0028] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present utility model. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0029] Embodiment 1

[0030] Referring to Figures 1-7 , this is the first embodiment of the present utility model. This embodiment provides a car backrest buckle for easy disassembly. The car backrest buckle for easy disassembly includes a main body assembly 100, a fixing assembly 200, and a limiting assembly 300. The three cooperate to strengthen the fixation of the backrest.

[0031] Specifically, the fixing assembly 200 includes a fixing member 201, which includes a pressing rod 201a, a connecting strip 201b, a pressing block 201c, a fixing block 201d, and a first spring 201e. The number of connecting strips 201b is two, and both are arranged at the bottom of the pressing rod 201a. The number of pressing rods 201a is two, and both are arranged at the top of the connecting strip 201b. The number of pressing blocks 201c is four, and all are arranged on both sides of the connecting strip 201b. The number of fixing blocks 201d is four, and all are fixed on the top of the pressing block 201c. The number of first springs 201e is two, and both are arranged at one end of the fixing block 201d.

[0032] After the seat backrest 102 needs to be engaged with the vehicle seat 101, by squeezing the extrusion rod 201a, the extrusion rod 201a squeezes the connecting bar 201b, and the connecting bar 201b will squeeze the extrusion blocks 201c on both sides. The movement of the extrusion blocks 201c drives the movement of the fixing blocks 201d. The movement of the fixing blocks 201d will increase the pulling force on the first spring 201e. When the extrusion blocks 201c move to the fixed position, the fixing of the seat backrest 102 and the vehicle seat 101 can be completed, which is more intuitive and easy to operate. Users can quickly and conveniently complete the fixing of the seat backrest, improving the convenience of use and ensuring that the seat backrest will not loosen or shake easily during use.

[0033] Specifically, the limiting component 300 is arranged at one end of the connecting bar 201b and includes a limiting member 301, which includes a pressing rod 301a, a gear disk 301b, a gear sleeve 301c, a turntable 301d and a sliding rod 301e. The number of pressing rods 301a is two, and they are both arranged at one end of the extrusion rod 201a. The number of gear disks 301b is two, and they are both arranged on one side of the connecting bar 201b. The number of gear sleeves 301c is two, and they are both arranged on one side of the gear disk 301b. The gear sleeve 301c is meshed with the gear disk 301b. The number of turntables 301d is two, and they are both arranged at one end of the gear sleeve 301c. Six sliding grooves 301d-1 are formed in the inner wall of the turntable 301d, and the number of sliding rods 301e is twelve, and they are all arranged to slide on the inner wall of the sliding groove 301d-1.

[0034] When limiting is required after the fixing is completed, after squeezing the connecting bar 201b, the connecting bar 201b will squeeze the gear disk 301b, causing the gear disk 301b to engage with the gear sleeve 301c. Then, the pressing rod 301a is rotated. The rotation of the pressing rod 301a drives the rotation of the gear disk 301b. The gear disk 301b drives the rotation of the gear sleeve 301c. The gear sleeve 301c drives the rotation of the turntable 301d. The turntable 301d drives the sliding rod 301e to slide on the inner wall of the sliding groove 301d-1. After the sliding rod 301e slides to engage with the vehicle seat 101, the seat backrest 102 and the vehicle seat 101 can be further fixed and limited, without a complex operation process, saving time and effort. At the same time, it will not take too much time to disassemble, improving the use efficiency of the seat.

[0035] Embodiment 2

[0036] Refer to Figures 1-7 , which is the second embodiment of the present invention. This embodiment is based on the previous embodiment.

[0037] Specifically, a housing 202a is sleeved outside the extrusion rod 201a, and a fixing housing 202b is sleeved outside the connecting strip 201b. A second spring 202c is arranged at the bottom of the extrusion rod 201a. The number of the second springs 202c is two. One end of each second spring 202c is fixed to the bottom of the extrusion rod 201a, and the other end is fixed to the top of the fixing housing 202b.

[0038] The housing 202a is used to protect the extrusion rod 201a, and the fixing housing 202b is used to protect and support the connecting strip 201b. By extruding the extrusion rod 201a, the extrusion rod 201a will extrude the second spring 202c, increasing the resilience of the extrusion rod 201a.

[0039] Specifically, a clamping groove 202b-1 corresponding to the extrusion block 201c is formed in the fixing housing 202b, and the extrusion block 201c is located on the inner wall of the clamping groove 202b-1 and slides.

[0040] By moving the extrusion block 201c to drive the fixing block 201d to move, the movement of the fixing block 201d will increase the pulling force on the first spring 201e. When the extrusion block 201c moves outside the clamping groove 202b-1, the seat back 102 can be fixed to the vehicle seat 101.

[0041] Specifically, two extrusion strips 202d are arranged at one end of the connecting strip 201b. The extrusion strips 202d are both arranged at one end of the connecting strip 201b, and a toothed disc 301b is arranged on the extrusion strip 202d.

[0042] After the connecting strip 201b is extruded, the connecting strip 201b extrudes the extrusion strip 202d, and the extrusion strip 202d will extrude the toothed disc 301b, causing the toothed disc 301b to engage with the toothed sleeve 301c.

[0043] Specifically, a toothed ring 302a is sleeved outside the pressing rod 301a. A limiting groove 301a-1 is formed in the inner wall of the pressing rod 301a. A fixing shaft 302b is inserted into the inner wall of the limiting groove 301a-1. A limiting plate 302c is sleeved outside the fixing shaft 302b. The fixing shaft 302b is movably connected with the limiting plate 302c. A third spring 302d is arranged at the bottom of the limiting plate 302c. The number of the third springs 302d is two. One end of each third spring 302d is fixed to the inner wall of the limiting groove 301a-1, and the other end is fixed to the bottom of the limiting plate 302c.

[0044] The gear ring 302a is fixed to one end of the housing 202a. The fixed shaft 302b is used to support the limiting plate 302c. When the limit is released, by squeezing the limiting plate 302c, the limiting plate 302c squeezes the third spring 302d, so that the limiting plate 302c is separated from the gear ring 302a, thereby the limit can be released. When the limit needs to be set again, the squeezing of the limiting plate 302c is released. At this time, through the rebound of the third spring 302d, the limiting plate 302c is engaged with one end of the gear ring 302a, so that the limiting plate 302c can be limited.

[0045] Specifically, two chucks 302e are provided at one end of the gear ring 302a, both of which are arranged at one end of the gear ring 302a, and an activity groove 302e-1 corresponding to the pressing rod 301a is formed in the inner wall of the chuck 302e.

[0046] By rotating the pressing rod 301a, the rotation of the pressing rod 301a drives the gear disk 301b to rotate, the gear disk 301b drives the gear sleeve 301c to rotate, the gear sleeve 301c drives the turntable 301d to rotate, and the turntable 301d drives the sliding rod 301e to slide on the inner wall of the chute 301d-1. When the sliding rod 301e slides to be engaged with the vehicle seat 101, at this time, the rotation of the pressing rod 301a will also drive the gear disk 301b to rotate, and the rotation of the pressing rod 301a drives the limiting plate 302c to move, so that the limiting plate 302c enters the inner wall of the activity groove 302e-1, and then the squeezing of the limiting plate 302c is released. At this time, the limiting plate 302c will be engaged with the activity groove 302e-1, so that the limiting plate 302c can be limited to prevent the limiting plate 302c from reversing.

[0047] The ring gear 302a is provided with an inclined groove corresponding to the limiting plate 302c. The limiting plate 302c is arranged as an inclined surface. When the pressing rod 301a is rotated, it will drive the limiting plate 302c to move in the inclined groove. When the limiting plate 302c moves to separate from the inclined groove, the inclined groove will squeeze the limiting plate 302c. When squeezing the limiting plate 302c, an extrusion force can be applied to the third spring 302d. When the limiting plate 302c moves to engage with the inclined groove, the force of the third spring 302d rebounding will drive the limiting plate 302c to engage with the inclined groove. In this way, when the pressing rod 301a rotates the ring gear 302a, the rotation of the pressing rod 301a will not be limited. Through the setting of the ring gear 302a, the pressing rod 301a can be reversely limited to prevent the pressing rod 301a from reversing, resulting in the contraction of the latch 302g. When it is necessary to make the latch 302g contract, by moving the limiting plate 302c, the limiting plate 302c is separated from the inclined groove. When moving the limiting plate 302c, an extrusion force can be applied to the third spring 302d. By separating the limiting plate 302c from the inclined groove, the pressing rod 301a can be reversed, thereby causing the latch 302g to contract. Then, the limiting plate 302c is released, and the force of the third spring 302d rebounding will drive the limiting plate 302c to engage with the inclined groove again for the next use.

[0048] Embodiment 3

[0049] Referring to Figures 6-7 , this is the third embodiment of the present invention, and this embodiment is based on the first two embodiments.

[0050] Specifically, one end of the turntable 301d is provided with a fixed disk 302f. The number of the fixed disks 302f is two. Fixing grooves 302f-1 corresponding to the sliding rods 301e are formed in the inner walls of the fixed disks 302f. The sliding rods 301e are located and slide on the inner walls of the fixing grooves 302f-1. A latch 302g is arranged at the top of the sliding rod 301e. The number of the latches 302g is six, and all are arranged at the top of the sliding rod 301e.

[0051] Fixing holes corresponding to the sliding rods 301e are formed at the tops of the fixed disks 302f. By rotating the turntable 301d, the sliding rods 301e slide and expand and contract on the inner wall of the sliding groove 301d-1. When the sliding rods 301e move, they also slide on the inner walls of the fixing grooves 302f-1. When the sliding rods 301e move, they expand and contract on the inner walls of the fixing holes. The movement of the sliding rods 301e drives the movement of the latches 302g. When the latches 302g move to fixed positions, the seat backrest 102 and the vehicle seat 101 can be engaged.

[0052] Specifically, the fixed shell 202b is also provided with a driving groove 202b-2 corresponding to the latch 302g. The latch 302g is located and slides on the inner wall of the driving groove 202b-2.

[0053] When the sliding rod 301e contracts, it drives the clamping block 302g to move. After the clamping block 302g moves to the inner wall of the driving groove 202b-2, the clamping block 302g can be retracted.

[0054] Specifically, it further includes a main body assembly 100, which includes a vehicle seat 101, a seat backrest 102, and seat armrests 103. The seat backrest 102 is disposed on one side of the vehicle seat 101, the vehicle seat 101 is disposed on one side of the seat backrest 102, and the number of seat armrests 103 is two, both of which are disposed on one side of the vehicle seat 101.

[0055] The vehicle seat 101 is usually made of metal materials, providing a strong support structure for the seat and serving as a seat for providing body support to the driver and passengers. The seat backrest 102 ensures that it can withstand the weight of the human body and various pressures during use without deformation or damage. The seat armrests 103 are components installed on both sides of the seat for people to place their arms to obtain support and comfort.

[0056] Specifically, a sliding groove 101-1 corresponding to the clamping block 302g is formed in the inner wall of the vehicle seat 101.

[0057] By moving the clamping block 302g to the inner wall of the sliding groove 101-1, the clamping block 302g can be clamped, thereby also enabling the seat backrest 102 to be engaged with the vehicle seat 101.

[0058] During use, when it is necessary to install the seat backrest 102 on the vehicle seat 101, the fixed shell 202b is placed between the seat backrest 102 and the inner wall of the vehicle seat 101, and then the pressing rod 301a is squeezed. The pressing rod 301a squeezes the extrusion rod 201a. The extrusion rod 201a will squeeze the second spring 202c. At the same time, the extrusion rod 201a will also squeeze the connecting bar 201b. The movement of the connecting bar 201b will drive the extrusion bar 202d to move. The extrusion bar 202d will squeeze the gear disk 301b, causing the gear disk 301b to engage with the gear sleeve 301c. After the engagement, the connecting bar 201b will squeeze the extrusion blocks 201c on both sides, causing the extrusion blocks 201c to slide on the inner wall of the card slot 202b-1. The movement of the extrusion blocks 201c drives the fixed blocks 201d to move. The movement of the fixed blocks 201d will increase the pulling force on the first spring 201e. When the extrusion blocks 201c move to the outside of the card slot 202b-1, the seat backrest 102 and the vehicle seat 101 can be fixed. When further tightening and limiting are required, by squeezing the limiting plate 302c, the limiting plate 302c squeezes the third spring 302d, causing the limiting plate 302c to separate from the gear ring 302a to release the limit. Then, the pressing rod 301a is rotated. The rotation of the pressing rod 301a drives the limiting plate 302c to move, causing the limiting plate 302c to enter the inner wall of the movable slot 302e-1. The rotation of the pressing rod 301a also drives the gear disk 301b to rotate. The gear disk 301b drives the gear sleeve 301c to rotate. The gear sleeve 301c drives the turntable 301d to rotate. The turntable 301d drives the sliding rod 301e to slide on the inner wall of the sliding slot 301d-1. The movement of the sliding rod 301e will also slide on the inner wall of the fixed slot 302f-1. The movement of the sliding rod 301e will expand and contract in the inner wall of the fixed hole. The movement of the sliding rod 301e drives the clamping block 302g to move. When the clamping block 302g moves to engage with the inner wall of the sliding slot 101-1, the seat backrest 102 and the vehicle seat 101 can be clamped. After the clamping block 302g moves to the inner wall of the sliding slot 101-1, the squeezing of the limiting plate 302c is released. At this time, through the rebound of the third spring 302d, the limiting plate 302c engages with one end of the gear ring 302a, so that the limiting plate 302c can be limited. When it is necessary to release the limit and remove the seat backrest 102, by squeezing the limiting plate 302c, and then rotating the pressing rod 301a in the reverse direction, the clamping block 302g is retracted into the inner wall of the driving slot 202b-2, and then the pressing rod 301a is pulled. When the pulling reaches the separation of the connecting bar 201b and the extrusion block 201c, at this time, through the rebound of the first spring 201e, the extrusion block 201c returns to its original position. By repeating this process, the disassembly and assembly of the seat backrest 102 and the vehicle seat 101 are completed.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered by the scope of the claims of the present invention.

Claims

1. A detachable car backrest buckle, characterized in that: including, a fixing component (200), including a fixing piece (201), which includes an extrusion rod (201a), a connecting bar (201b), an extrusion block (201c), a fixing block (201d) and a first spring (201e); there are two connecting bars (201b), both of which are arranged at the bottom of the extrusion rod (201a); there are two extrusion rods (201a), both of which are arranged at the top of the connecting bar (201b); there are four extrusion blocks (201c), all of which are arranged on both sides of the connecting bar (201b); there are four fixing blocks (201d), all of which are fixed on the top of the extrusion block (201c); there are two first springs (201e), both of which are arranged at one end of the fixing block (201d); a limiting component (300), arranged at one end of the connecting bar (201b), including a limiting piece (301), which includes a pressing rod (301a), a toothed disc (301b), a toothed sleeve (301c), a turntable (301d) and a sliding rod (301e); there are two pressing rods (301a), both of which are arranged at one end of the extrusion rod (201a); there are two toothed discs (301b), both of which are arranged on one side of the connecting bar (201b); there are two toothed sleeves (301c), both of which are arranged on one side of the toothed disc (301b); the toothed sleeve (301c) is meshed with the toothed disc (301b); there are two turntables (301d), both of which are arranged at one end of the toothed sleeve (301c); six chutes (301d-1) are opened on the inner wall of the turntable (301d); there are twelve sliding rods (301e), all of which are arranged to slide on the inner wall of the chute (301d-1).

2. The detachable car backrest buckle according to claim 1, characterized in that: A sleeve (202a) is sleeved on the outer side of the extrusion rod (201a), a fixing shell (202b) is sleeved on the outer side of the connecting bar (201b), and a second spring (202c) is arranged at the bottom of the extrusion rod (201a); there are two second springs (202c), one end of each of them is fixed at the bottom of the extrusion rod (201a), and the other end is fixed at the top of the fixing shell (202b).

3. The detachable car backrest buckle according to claim 2, characterized in that: A clamping groove (202b-1) corresponding to the extrusion block (201c) is opened in the fixing shell (202b), and the extrusion block (201c) is located to slide on the inner wall of the clamping groove (202b-1).

4. The detachable car backrest buckle according to claim 3, characterized in that: An extrusion strip (202d) is arranged at one end of the connecting bar (201b); there are two extrusion strips (202d), both of which are arranged at one end of the connecting bar (201b), and the extrusion strip (202d) is provided with a toothed disc (301b).

5. The detachable car backrest buckle according to claim 4, characterized in that: A toothed ring (302a) is sleeved outside the pressing rod (301a). A limiting groove (301a-1) is formed in the inner wall of the pressing rod (301a). A fixing shaft (302b) is inserted into the inner wall of the limiting groove (301a-1). A limiting plate (302c) is sleeved outside the fixing shaft (302b). The fixing shaft (302b) is movably connected to the limiting plate (302c). A third spring (302d) is arranged at the bottom of the limiting plate (302c). The number of the third springs (302d) is two. One ends of the third springs are fixed to the inner wall of the limiting groove (301a-1), and the other ends are fixed to the bottom of the limiting plate (302c).

6. The detachable car backrest buckle according to claim 5, characterized in that: One end of the toothed ring (302a) is provided with a chuck (302e). The number of the chucks (302e) is two, and both are arranged at one end of the toothed ring (302a). An activity groove (302e-1) corresponding to the pressing rod (301a) is formed in the inner wall of the chuck (302e).

7. The detachable car backrest buckle according to claim 6, characterized in that: One end of the turntable (301d) is provided with a fixed disk (302f). The number of the fixed disks (302f) is two. Fixing grooves (302f-1) corresponding to the sliding rod (301e) are formed in the inner walls of the fixed disks (302f). The sliding rod (301e) slides in the inner wall of the fixing groove (302f-1). Six clamping blocks (302g) are arranged at the top of the sliding rod (301e).

8. The detachable car backrest buckle according to claim 7, characterized in that: The fixed housing (202b) is further provided with a driving groove (202b-2) corresponding to the clamping block (302g). The clamping block (302g) slides in the inner wall of the driving groove (202b-2).

9. The detachable car backrest buckle according to claim 8, characterized in that: It further includes a main body assembly (100), which includes a vehicle seat (101), a seat backrest (102) and seat armrests (103). The seat backrest (102) is arranged on one side of the vehicle seat (101). The vehicle seat (101) is arranged on one side of the seat backrest (102). The number of the seat armrests (103) is two, and both are arranged on one side of the vehicle seat (101).

10. The detachable car backrest buckle according to claim 9, characterized in that: A sliding groove (101-1) corresponding to the clamping block (302g) is formed in the inner wall of the vehicle seat (101).

Images