Car tailgate-mounted ball joint bike rack

Abstract

The present invention discloses a ball-jointed tailgate bicycle carrier for cars, in which: a drive element (3) is disposed on a support mechanism (1); a clamping assembly comprises a clamping seat (4), a first locking mechanism, a second locking mechanism, and a first and second mounting mechanism opposed to each other; and a movable lock is disposed between the clamping seat (4) and the drive element (3) of the support mechanism (1). The use of a handling element (2) allows the rear tow ball to be locked or unlocked by the clamping seat (4) through the pivoting action of the drive element (3) and the clamping seat (4), and enables quick and easy removal and assembly of the tailgate bicycle carrier and the car tailgate. Figure to be published with the abstract: Figure 1

Description

Title of the invention: Ball joint tailgate bicycle rack for cars technical field

[0001] The present invention belongs to the technical field of automotive products, in particular relates to a ball joint tailgate bicycle carrier for cars. Technical context

[0002] A tailgate-mounted bicycle rack is a device for mounting on the tailgate of a car. To transport bicycles, and to solve the inconvenient problems of transporting them in a car due to their bulkiness, a feature highly valued by cycling enthusiasts, tailgate bike racks were originally designed to prevent the trunk lid from obstructing the opening. This design typically involved a folding mechanism with a ball joint clamp, which attaches to the tow ball on the car's tailgate. When the folding mechanism is unfolded, the rack forms a platform for the bicycles. However, in practice, tailgate bike racks require constant mounting and dismounting, and the ball joint clamp needs to be manually locked and unlocked, making the process cumbersome and inconvenient. Description of the invention

[0003] The objective of the present invention is to resolve the shortcomings of said technology and to design a ball-joint tailgate bicycle carrier for cars, by holding the mobile handling element for connection activities in a pivoting manner using the drive element and the clamping seat to achieve the locking or unlocking of the clamping seat to the tow ball, allowing for quick completion of the dismantling and assembly of the rear and tailgate bicycle carrier, easy to operate and more convenient to use.

[0004] In order to resolve these technical problems, the technical solution of the present invention is as follows: a ball-jointed tailgate bicycle carrier for cars, comprising:

[0005] a support mechanism, said support mechanism being intended to support and position bicycles, said support mechanism being equipped with a drive element;

[0006] a clamping assembly, the clamping assembly comprising a clamping seat, a first locking mechanism, a second locking mechanism, and a first mounting and a second mounting opposed to each other, said clamping seat being pivotally connected to said drive element, said first mounting and said second mounting being pivotally connected to said clamping seat, the second locking mechanism being disposed on said clamping seat, and said first mounting and said second mounting being configured to clamp a tow ball of a car tailgate, in order to fix said clamping seat to the tow ball of the car tailgate;

[0007] a movable lock, said movable lock being disposed between said clamping seat and said drive element of said support mechanism;

[0008] when said support mechanism is tilted into the folded state, said movable lock and the first locker fit into each other; when said support mechanism is tilted into the unfolded state, said movable lock and the second locker fit into each other.

[0009] Preferably, the clamping assembly also includes a switching structure pivotally connected to said clamping seat, said switching structure being provided with a first rail groove and a second rail groove interconnected and intersected, said first locking device being disposed in said switching structure;

[0010] when said switching structure rotates and moves to a first position state, a position pin of said first assembly is in said second rail groove, so that said first assembly is in an unlocked state;

[0011] when said switching structure rotates and moves to a second position state, the position pin of said first assembly is moved from said second rail groove to said first rail groove, so that said first assembly is in a locked state.

[0012] Preferably, said support mechanism comprises a connecting frame and a support frame, and two support arms respectively pivotally connected to the two sides of said support frame, said connecting frame and said support frame being pivotally connected to each other, said drive element being fixedly disposed on said connecting frame, said drive element and said second mounting pivoting respectively about the same axis and being disposed in said clamping seat, a handling element being movablely disposed on said support frame, said support frame being equipped with a self-locking mechanism, so that said connecting frame and said support frame lock each other when said support frame is in the unfolded state, said self-locking mechanism being connected to said handling element.

[0013] Preferably, said movable lock comprises a sliding element and an engagement pin which is disposed on said sliding element, the first locking and the second locking being both grooves intended to couple with said engagement pin, said sliding element being disposed in a retractable and movable manner on said drive element, a first elastic element being disposed between said sliding element and said connecting frame in order to automatically restore said sliding element.

[0014] Preferably, the traction body of said handling element is connected to the sliding element, or the traction body of said handling element passes through said connecting frame to be connected to the sliding element, said connecting frame being provided with a locking device for locking the sliding element.

[0015] Preferably, said self-locking mechanism comprises a first hooking component pivotally connected to said support frame, one end of a third torsion spring on said support frame being abutted against an opposite side of a carabiner portion on said first hooking component, and when said support frame is in the unfolded state, the carabiner portion of said first hooking component hooks onto a first connecting pin on said connecting frame.

[0016] Preferably, said self-locking mechanism also includes a second hooking component pivotally connected to said support frame, a post element being pivotally connected to the part of said self-locking mechanism on the support frame, the other end of said third torsion spring on said support frame being abutted against a side opposite the carabiner part on said second hooking component, the carabiner part on said second hooking component hooking to a second connecting pin pivotally connected to said post element.

[0017] Preferably, said self-locking mechanism also includes a limiting structure, said limiting structure being movably arranged on said support frame, a second elastic element being disposed between a first end of said limiting structure and a fixing component of said support frame, a second end of said limiting structure being connected to the end of said support frame through which the handling element passes;

[0018] said first attachment component and said second attachment component both rotate in a limited manner and are arranged within the movable space of said limiting structure, and said limiting structure is provided with a first contact element which is abutted against said first attachment component, and a second contact element abutted against said second attachment component, respectively;

[0019] said self-locking mechanism is disposed on both sides of said support frame.

[0020] Preferably, in said clamping seat, the bicycle carrier has a first shaft rotating and a second rotating shaft; said first assembly rotates about said first rotating shaft and is disposed in said clamping seat, said first rotating shaft is fitted with a first torsion spring, the ends of said first torsion spring are respectively abutted against said clamping seat and said first assembly; said second assembly rotates around the second rotating shaft and is disposed in said clamping seat, said second rotating shaft is fitted with a second torsion spring, the ends of said second torsion spring are abutted respectively against said drive element and said second assembly; an arched support is fitted between said first rotating shaft and said second rotating shaft.

[0021] Preferably, a third elastic element is disposed between said switching structure and said clamping seat, such that said switching structure tends to return to the second position state.

[0022] Compared to the prior art, the beneficial effects of the present invention are as follows:

[0023] The support mechanism of the present invention is pivotally connected to a clamping seat which can be mounted on the tailgate tow ball by means of a drive element, by holding the movable handling element for connection activities pivotally with the drive element and the clamping seat to achieve the locking or unlocking of the clamping seat to the tow ball, allowing to quickly complete the dismantling and mounting of bike racks on tailgate and car tailgate, easy to operate and more convenient to use. Brief description of the drawings

[0024] [Fig. 1] is a diagram of the structure of said tailgate bicycle carrier in embodiment I;

[0025] [Fig.2] is a diagram of the structure of said tailgate bicycle carrier in embodiment II;

[0026] [Fig.3] is a cross-sectional view of said tailgate bicycle carrier in the embodiment;

[0027] [Fig.4] is a diagram of the structure of said connecting frame and said seat of tightening in the embodiment;

[0028] [Fig.5] is a diagram of the structure of said connecting frame and said clamping seat when said switching structure is in the second position in the embodiment;

[0029] [Fig.6] is a cross-sectional view of said connecting frame and said clamping seat when said switching structure is in the second position in the embodiment;

[0030] [Fig.7] is a diagram of the structure of said connecting frame and said clamping seat when said switching structure is in the first position state in the embodiment;

[0031] [Fig.8] is a cross-sectional view of said connecting frame and said clamping seat when said switching structure is in the first position in the embodiment;

[0032] [Fig.9] is a diagram of the structure of said tailgate bicycle carrier in the case where said connecting frame and said support frame are folded in the embodiment;

[0033] [Fig. 10] is a diagram of the structure of said tailgate bicycle carrier in the case where the upright element and said support frame are folded in the embodiment.

[0034] In the figures: 1. support mechanism; 11. connecting frame; 12. support frame; 13. support arm; 1101. first connecting pin; 2. Handling element; 201. Traction body; 3. Drive element; 301. Moving edge; 302. Positioning edge; 303. Displacement groove; 4. Clamping seat; 401. Interlocking groove; 402. Arched support; 403. Guide edge; 5. First assembly; 501. Positioning pin; 502. First rotating shaft; 503. First torsion spring; 6. Second assembly; 601. Second rotating shaft; 602. Second torsion spring; 7. Switching structure; 701. First rail groove; 702. Second rail groove; 703. Drive component; 8. Movable lock; 81. Sliding element; 82. Interlocking pin; 801. First elastic element; 802. Guide column; 9. Self-locking mechanism; 91. first attachment component; 92. second attachment component; 93. limiting structure; 901. third torsion spring; 902. fixing component; 903. second elastic element; 904. first contact element; 905.second contact element; 10. locking device; 14. upright element; 1401. second connecting pin; 15. third elastic element; 16. folding lamp body; 17. connecting sleeve; 18. rear light; 19. protective cover.

[0035] Detailed description of particular embodiments

[0036] The present invention is described in more detail below with reference to the figures and specific embodiments that accompany it.

[0037] With reference to [Fig.1] to [Fig.8], a ball-joint tailgate bicycle carrier for cars includes a support mechanism 1, a handling element 2, a folding lamp body 16, and a clamping assembly, a support mechanism 1 comprising a connecting frame 11, a support frame 12, and two support arms 13, the connecting frame 11 and the support frame 12 being pivotally movable, the two support arms 13 being pivotally arranged on both sides of the support frame 12 to support two wheels of a bicycle respectively, the support arms 13 being coupled by snap-fitting with the corresponding side of the support frame 12 when fully unfolded outwards away from the support frame 12, and the support arm 13 being snapped with the corresponding side of the support frame 12.

[0038] The connecting frame 11 has a U-shaped frame structure, the support frame 12 comprises two hollow rod structures, the folding lamp body 16 has two symmetrically arranged connecting sleeves 17, the two connecting sleeves 17 are respectively fitted together to fit the two rod structures, so as to allow the folding lamp body 16 to be removably connected to the support mechanism 1, and the movable rear lights 18 which can be folded inwards are pivotally connected to the two sides of the folding lamp body 16.

[0039] With reference to [Fig.2] and [Fig.3], the handling element 2 is arranged in a retractable and movable manner on the support frame 12, the two sides of the support frame 12 are arranged in a hollow manner and a self-locking mechanism 9 is disposed in its hollow cavity, the self-locking mechanism 9 comprises a second hooking component 92 and a first hooking component 91 pivotally connected to the support frame 12, and a limiting structure 93 movablely disposed on the inner wall of the support frame 12, and a carabiner portion is formed in an opposite lower portion of the second hooking component 92 and the first hooking component 91, a third torsion spring 901 is disposed in a position on the inner wall of the support frame 12,and the two ends of the third torsion spring 901 hook respectively onto the opposite sides of the second hooking component 92 and the first hooking component 91, so that the second hooking component 92 tends to rotate away from the first hooking component 91, and the second hooking component 92 and the first hooking component 91 both rotate in a limited manner and are arranged in a movable space of the limiting structure 93, and the limiting structure 93 is respectively provided with a first contact element 904 that hooks onto the first hooking component 91 and a second contact element 905 that hooks onto the second hooking component 92, and a second elastic element 903 is arranged between the first end of the limiting structure 93 and the fixing component 902 of the inner wall of the support frame 12, and the second elastic element 903 is a structure with spring,and the second end of the limiting structure 93 is connected to the end of the support frame 12 through which the handling element 2 passes, to allow the self-locking mechanism 9 to connect to the handling element 2; the support frame 12 has the two sides of the self-locking mechanism 9 which are pivotally connected to the two sides of the upright element 14; when the upright element 14 and the support frame 12 are fully unfolded, the second hooking component 92 passes through the end of the support frame 12 and engages with the second connecting pin 1401 of the upright element 14 to lock the position of the upright element 14, and the support frame 12 in order to maintain the unfolded state between them; When the connecting frame 11 and the support frame 12 are fully unfolded, the first hooking component 91 passes through the end of the support frame 12 and snaps into place with the first connecting pin 1101 of the connecting frame 11 to lock the position of the connecting frame 11 and the support frame 12 in order to maintain the unfolded state between the two;When the manipulator element 2 is actuated, it allows the limiting structure 93 to move into action, so that the second latching component 92 is driven by the second contact element 905 to overcome the rotation of the third torsion spring 901 in order to unlock the second connecting pin 1401 so that the user can fold the upright element 14 and the support frame 12, or that the first latching component 91 is driven by the first contact element 904 to overcome the rotation of the third torsion spring 901 and unlock the first connecting pin 1101 so that the user can fold the connecting frame 11 and the support frame 12, as shown in [Fig. 9] and [Fig. 10].

[0040] With reference to [Fig.4], the clamping assembly comprises a clamping seat 4, a first locking lug, a second locking lug, a first mounting 5 and a second mounting 6 opposed to each other. The connecting frame 11 is permanently fitted with a drive element 3, and a protective shell 19 is arranged on the outer side of the clamping seat 4. The rear tow ball of the car tailgate passes through the protective shell 19 and is removably connected to the clamping seat 4, the first assembly 5 and the second assembly 6 being both pivotally connected inside the clamping seat 4. The clamping seat 4 is fitted with a first rotating shaft 502 and a second rotating shaft 601, and the first assembly 5 rotates around the first rotating shaft 502 and is fitted inside the clamping seat 4. The first rotating shaft 502 is sheathed with a first torsion spring 503.the two ends of the first torsion spring 503 hook respectively to the clamping seat 4 and the first assembly 5, so that the first assembly 5 tends to move outwards; the second assembly 6 rotates around the second rotating shaft 601 and is disposed inside the clamping seat 4, the drive element 3 rotates around the second rotating shaft 601 and is disposed inside the clamping seat 4, the second rotating shaft 601 is sheathed by a second torsion spring 602, and the two ends of the second torsion spring 602 are respectively butted against the drive element 3 and the second assembly 6, so that the second assembly 6 tends to move outwards in a limited way; An arched support 402 is placed between the first rotating shaft 502 and the second rotating shaft 601, the arched support 402 serving to support and position the first rotating shaft 502 and the second rotating shaft 601, . ensuring stable rotation of the first rotating shaft 502 and the second rotating shaft 601, and preventing their radial or axial movement.

[0041] With reference to [Fig.5], [Fig.6], [Fig.7] and [Fig.8], the clamping seat 4 is pivotally connected to a switching structure 7, the switching structure 7 consists of two parallel switching plates, the switching plate is provided with a first rail groove 701 and a second rail groove 702 interconnected and interlaced, and the drive element 3 moves the switching structure 7 from the second position to the first position by means of a movable lock 8 connected to the handling element 2, said first rail groove 701 forming a clamping angle with said second rail groove 702, the clamping angle being an acute or right angle;

[0042] The movable lock 8 comprises a sliding element 81 and a locking pin 82 fitted on the sliding element 81, the first locking pin and the second locking pin are both grooves for coupling with said locking pin 82, the two ends of the locking pin 82 pass through the clamping seat 4 and are actuated with the two switching plates respectively, and the sliding element 81 is provided with a guide column 802 which is fitted to fit the connecting frame 11, so as to allow the sliding element 81 to be arranged in a retractable and movable manner along the axial direction of the guide column 802 inside the drive element 3,The drive element 3 is provided with a displacement groove 303 passing through it and slidably connected to the end of the locking pin 82 in order to restrict the sliding activity of the position pin 501 along the axial direction of the guide column 802.

[0043] A first elastic element 801 is provided between the sliding element 81 and the connecting frame 11, the first elastic element 801 is a spring structure and hooked on the guide column 802, in order to allow the sliding element 81 to tend to approach the clamping seat 4, and to achieve an automatic recovery of the sliding element 81, the traction body 201 of the handling element 2 passes through the connecting frame 11 and is connected to the sliding element 81, preferably selectively, the traction body 201 can be a traction rope structure, the clamping seat 4 corresponding to the side of the movable lock 8 is formed with a guide edge 403 to guide the position pin 501 to be mobilized between the first position and the second position.

[0044] When the support mechanism 1 is tilted into the folded state, the movable lock 8 and the first lock engage and cooperate with each other, and the switching structure 7 rotates and moves to the first position, so that the pin of position 501 of the first assembly 5 is in the second rail groove 702, and that the first assembly 5 is in the unlocked state;

[0045] When the support mechanism 1 is tilted to the unfolded state, the movable lock 8 and the second lock engage and cooperate with each other, and the switching structure 7 rotates and moves to the second position, so that the position pin 501 of the first assembly 5 is transferred from the second rail groove 702 to the first rail groove 701, and the first assembly 5 is in the locked state; the first assembly 5 and the second assembly 6 tightly clamp the rear hitch ball of the car tailgate, in order to fix the clamping seat 4 to the rear hitch ball of the car tailgate.

[0046] The first lock and the second lock exist in yet another embodiment, the first lock is a drive component 703 of the switching structure 7 extending out of the guide edge 403, a drive component 703 has a groove which cooperates with the snap pin 82, and the second lock is a snap groove 401 which opens onto the clamping seat 4.

[0047] A third elastic element 15 is disposed between the switching structure 7 and the clamping seat 4. This third elastic element 15 is a tension spring, and the switching structure 7 tends to return to the second position under the action of the third elastic element 15. The manual operating element 2 is held by hand so that the sliding element 81 of the seat moves away from the clamping seat 4. Under the action of the traction body 201, the end of the locking pin 82 is detached from the locking groove 401 of the clamping seat 4. The connecting frame 11 can be tilted upwards to be folded relative to the clamping seat 4, and then the manual operating element 2 can be released. Under the action of the first elastic element 801, the end of the locking pin 82 catches on the guide edge. 403,The end of the locking pin 82 is butted against the drive component 703 and moves along the guide edge 403. The locking pin 82 engages in a slot in the drive component 703. As the connecting frame 11 continues to tilt upwards, the movable lock 8 is actuated by the switching structure 7 to overcome the third elastic element 15 and tilt into the first position. At this moment, the support mechanism 1 is tilted into the folded position. The positioning pin 501 of the first assembly 5 engages the inner wall of the second rail groove 702. The first assembly 5 moves outwards along the second rail groove 702. The second assembly 6 engages the movable edge 301 of the drive element 3 and can be rotated for locking. space, and a passageway for the rear tow ball is formed between, the first assembly 5 and the second assembly 6, so that the clamping seat 4 can be removed and mounted on the rear tow ball; in the process of holding the movable handling element 2, the handling element 2 can also connect the limiting structure 93 to unlock the connecting frame 11 and the support frame 12, so that the support frame 12 can be folded by tilting downwards relative to the connecting frame 11, so that the bicycle on the tailgate bike rack can be adjusted at an angle, and so that the opening of a car boot lid can be avoided being blocked.

[0048] When it is necessary to fix the clamping seat 4 and the rear coupling ball, the connecting frame 11 can be subjected to a downward unfolding activity relative to the clamping seat 4, so that the snap pin 82 moves along the guide edge 403 to the position corresponding to the snap groove 401, and the first elastic element 801 resumes its deformation to cause the recovery of the sliding element 81, the end of the snap pin 82 is snapped into the corresponding snap groove 401 to lock the clamping seat 4 and the drive element 3, at the same time, the third elastic element 15 resumes its deformation to cause the recovery of the switching structure 7 to the second position state;The position pin 501 hooks onto the inner wall of the first rail groove 701, preferably selectively. The position pin 501 has a limiting plane, and the limiting plane resists and cooperates with the inner wall of the first rail groove 701 to prevent the first assembly 5 from separating outwards. The second assembly 6 hooks onto the positioning edge 302 of the drive element 3 and is positioned so that the first assembly 5 and the second assembly 6 remain in the folded state and form a clamping cavity for tightening the rear coupling ball.

[0049] When using a tailgate-mounted bicycle carrier, the user can lock or unlock the clamping seat 4 onto the rear tow ball by holding the movable handling element 2. This is achieved by pivoting the drive element 3 and the clamping seat 4, thus enabling quick removal and installation of the rear bicycle carrier and the car tailgate. This is convenient and easy to use. The user can also operate the pedal to unlock the lock between the upright element 14 and the support frame 12, and the lock between the connecting frame 11 and the support frame 12, providing operational flexibility and improving the user experience.

[0050] Preferably selective, the connecting frame 11 is equipped with a locking device 10 for locking the sliding element 81, and the locking device 10 is a mechanical lock, and the mechanical seat comprises a lock core, a lock body, and a lock tongue, which is of the art previous and will not be discussed in detail in this document. The position of the sliding element 81 can be fixed by the locking tab of the locking device 10, thus preventing the user from unlocking the clamping seat 4 and the drive element 3 by detaching the engagement pin 82 from the engagement groove 401 through improper handling.

Claims

1.

2. Demands Tailgate-mounted ball-joint bicycle rack for cars, characterized by the fact that it includes: a support mechanism (1), said support mechanism (1) being intended to support and position bicycles, said support mechanism (1) being provided with a drive element (3); a clamping assembly, the clamping assembly comprising a clamping seat (4), a first locking member, a second locking member, and a first mounting (5) and a second mounting (6) opposed to each other, said clamping seat (4) being pivotally connected to said drive element (3), said first mounting (5) and said second mounting (6) being pivotally connected to the clamping seat (4), the second locking member being disposed on said clamping seat (4), said first mounting (5) and said second mounting (6) being configured to clamp a tow ball of a car tailgate in order to fix said clamping seat (4) to the tow ball of the car tailgate; a movable lock (8), said movable lock (8) being disposed between said clamping seat (4) and said drive element (3) of said support mechanism (1); when said support mechanism (1) is tilted into the folded state, said movable lock (8) and the first locker fit into each other; when said support mechanism (1) is tilted into the unfolded state, said movable lock (8) and the second locker fit into each other. Car tailgate bicycle carrier with ball joint according to claim 1, characterized in that the clamping assembly also includes a switching structure (7) pivotally connected to said clamping seat (4), said switching structure (7) being provided with a first rail groove (701) and a second rail groove (702) intersecting and interconnected, said first locker being disposed in said switching structure (7); when said switching structure (7) rotates and moves to a first position state, a position pin (501) of said first assembly (5) is in said second rail groove (702), so that said first assembly (5) is in an unlocked state; when said switching structure (7) rotates and moves to a second position state, the position pin (501) of said first assembly (5) is moved from said second rail groove (702) to said first rail groove (701), so that said first assembly (5) is in a locked state.

3. A ball-joint tailgate bicycle carrier for cars according to claim 2, characterized in that said support mechanism (1) comprises a connecting frame (11) and a support frame (12), as well as two support arms (13) respectively pivotally connected to the two sides of said support frame (12), said connecting frame (11) and said support frame (12) being pivotally connected to each other, said drive element (3) being fixedly disposed on said connecting frame (11), said drive element (3) and said second mounting (6) pivoting respectively about the same axis and being disposed in said clamping seat (4), a handling element (2) being movablely disposed on said support frame (12),said support frame (12) being equipped with a self-locking mechanism (9) such that said connecting frame (11) and said support frame (12) lock each other when said support frame (12) is in the unfolded state, said self-locking mechanism (9) being connected to the handling element (2).

4. A car tailgate bicycle carrier with ball joint according to claim 3, characterized in that said movable lock (8) comprises a sliding element (81) and an engagement pin (82) which is disposed on said sliding element (81), the first lock and the second lock being both grooves intended to couple with said engagement pin (82), said sliding element (81) being disposed in a movable and retractable manner on said drive element (3), a first elastic element (801) being disposed between said sliding element (81) and said connecting frame (11) to automatically restore said sliding element (81).

5. A ball-jointed tailgate bicycle carrier for cars according to claim 4, characterized in that the traction body (201) of said handling element (2) is connected to said sliding element (81), or in that the traction body (201) of said handling element (2) passes through said connecting frame (11) to be connected to said sliding element (81), said connecting frame (11) being provided with a locking device (10) for locking said sliding element (81).

6. A car tailgate bicycle carrier with ball joint according to claim 3, characterized in that said self-locking mechanism (9) comprises a first attachment component (91) pivotally connected to said support frame (12), one end of a third torsion spring (901) on said support frame (12) being abutted against an opposite side of a snap hook portion on said first attachment component (91), and when said support frame (12) is in the unfolded state, the snap hook portion of said first attachment component (91) hooks onto a first connecting pin (1101) on said connecting frame (11).

7. A car tailgate-mounted ball joint bicycle carrier according to claim 6, characterized in that said self-locking mechanism (9) also comprises a second attachment component (92) pivotally connected to said support frame (12), a post element (14) being pivotally connected to the part of said self-locking mechanism (9) on the support frame (12), the other end of the third torsion spring (901) on said support frame (12) being abutted against a side opposite the snap hook part on said second attachment component (92), the snap hook part on the second attachment component (92) hooking to a second connecting pin (1401) pivotally connected to the post element (14).

8. A ball-jointed tailgate bicycle carrier for cars according to claim 7, characterized in that said self-locking mechanism (9) also comprises a limiting structure (93), said limiting structure (93) being movably arranged on said support frame (12), a second elastic element (903) being disposed between a first end of said limiting structure (93) and a fastening component (902) of said support frame (12), a second end of said limiting structure (93) being connected to the end of said support frame (12) through which the handling element (2) passes; said first attachment component (91) and said second attachment component (92) are both movably restricted and are disposed within the movable space of said limiting structure (93), and said limiting structure (93) is provided with a first contact element (904) abutting said first hooking component (91), and a second contact element (905) abutting said second hooking component (92), respectively; said self-locking mechanism (9) is disposed on both sides of said support frame (12).

9. A car tailgate bicycle carrier with ball joint according to claim 1, characterized in that in said clamping seat (4), the bicycle carrier has a first rotating shaft (502) and a second rotating shaft (601); said first assembly (5) rotates around said first rotating shaft (502) and is disposed in said clamping seat (4), said first rotating shaft (502) is fitted with a first torsion spring (503), the ends of said first torsion spring (503) are respectively abutted against said clamping seat (4) and said first assembly (5); said second assembly (6) rotates around the second rotating shaft (601) and is disposed in said clamping seat (4), said second rotating shaft (601) is fitted with a second torsion spring (602), the ends of said second torsion spring (602) are respectively abutted against said drive element (3) and said second assembly (6);an arched support (402) is fitted between said first rotating shaft (502) and said second rotating shaft (601).

10. Car tailgate bicycle carrier with ball joint according to claim 2, characterized in that a third elastic element (15) is disposed between said switching structure (7) and said clamping seat (4), such that said switching structure (7) tends to return to the second position state.

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