Connecting mechanism of seat part and supporting assembly

Abstract

The utility model discloses a connecting mechanism for a seat part and a supporting component, a linkage component is positioned between the supporting component and the seat part, and the linkage component is configured to be used for linking the folding action of the seat part and the supporting component, so that the seat part and the supporting component are correspondingly drawn close and folded. The folding action or the unfolding action of the seat part and the supporting assembly can be linked through the linkage assembly, then the seat part and the supporting assembly are correspondingly closed to be folded or correspondingly rotated to be unfolded, the folding and unfolding mechanism has the advantages of being convenient and fast to fold and unfold and convenient to operate, in addition, the folded whole vehicle is more compact in structure, the size is minimized, and the structure is compact. And the requirements of a user on carrying and storage convenience are met.

Description

[Technical field]

[0001] The utility model relates to the technical field of baby carriages, in particular to a connecting mechanism between a seat part and a supporting assembly. [Background technology]

[0002] When parents take their babies out, they usually bring a stroller. Traditional strollers are large in size and have no folding function or are still very large after folding, so they are not suitable for long-distance or long-term family travel. Therefore, portable folding strollers that are easy to fold have been widely used as a means of transportation for babies and young children on the market.

[0003] With the improvement of living standards, people have higher and higher requirements for travel convenience. Therefore, the operability of the stroller when folding and the size of the stroller after folding have become the focus of consumers. More specifically, for foldable strollers, the better the linkage of the components of the stroller, the easier it is to fold and unfold. Conversely, it is more laborious to operate. As for the size of the stroller after folding, in order to facilitate getting on and off the car or even on and off the plane, of course, it is hoped that the size of the stroller after folding is as small as possible; even when it is not in use and stored at home, the smaller the size, the less space it takes up.

[0004] However, most of the existing baby strollers still have the following defects:

[0005] 1. It cannot be fully folded. After folding, the stroller still occupies a large volume, which is not conducive to carrying and transporting.

[0006] 2. Complex structure and high production cost.

[0007] 3. The user needs to fold several groups of components separately, which is time-consuming and laborious.

[0008] For this reason, the present invention is studied and proposed in view of the above-mentioned problems. [Utility Model Content]

[0009] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a connection mechanism between a seat portion and a support assembly, wherein the folding or unfolding action of the seat portion and the support assembly can be linked through a linkage assembly, thereby making the seat portion and the support assembly correspondingly close together and folded or correspondingly rotated and unfolded, and the utility model has the characteristics of convenient folding and unfolding and easy operation. In addition, the structure of the entire vehicle after folding is more compact and the volume is minimized, thereby satisfying the user's requirements for convenient carrying and storage.

[0010] In order to solve the above technical problems, the utility model provides a connection mechanism between a seat part and a support assembly, which is applied to a child bicycle frame that can be switched between an unfolded state and a folded state, and comprises:

[0011] Support component 1, the support component 1 is used for supporting and can be folded by approaching relatively close to each other;

[0012] Seat portion 2, the seat portion 2 is slidably arranged on the support component 1;

[0013] Linkage component 4, the linkage component 4 is located between the support component 1 and the seat portion 2, and the linkage component 4 is configured to be used for linking the folding actions of the seat portion 2 and the support component 1, so that the seat portion 2 and the support component 1 approach and fold correspondingly.

[0014] As described above, a connection mechanism between a seat portion and a support component, the support component 1 includes a support base 11, a front foot rod 12 and a rear foot rod 13, the upper end of the front foot rod 12 is connected to the support base 11, and the upper end of the rear foot rod 13 is connected to the support base 11; the seat portion 2 is slidably arranged on the support base 11; the linkage component 4 further includes a support linkage rod 43, a support linkage block 44, a front linkage rod 46 and a rear linkage rod 45, the front end of the front linkage rod 46 is rotatably connected to the front foot rod 12, the rear end of the front linkage rod 46 is rotatably connected to the front end of the rear linkage rod 45, the rear end of the rear linkage rod 45 is rotatably connected to the rear foot rod 13, the upper end of the support linkage rod 43 is rotatably connected to the rear part of the seat portion 2, the middle part of the support linkage rod 43 is rotatably connected to the upper part of the rear foot rod 13, the lower end of the support linkage rod 43 is rotatably connected to the upper end of the support linkage block 44, and the lower end of the support linkage block 44 is rotatably connected to the rear linkage rod 45.

[0015] As described above, a connection mechanism between a seat portion and a support component, a linkage reset elastic member for driving the front linkage rod 46 and the rear linkage rod 45 to rotate and approach and fold relative to each other is provided between the front linkage rod 46 and the rear linkage rod 45.

[0016] As described above, a connection mechanism between a seat portion and a support component, the support linkage rod 43 includes a first connection section 431 whose upper end is rotatably connected to the rear part of the seat portion 2 and a second connection section 432 connected to the first connection section 431 and extending forward, the front end of the second connection section 432 is rotatably connected to the upper end of the support linkage block 44, and the connection end of the first connection section 431 and the second connection section 432 is rotatably connected to the rear foot rod 13.

[0017] As described above, a connection mechanism between a seat portion and a support component, a support sliding sleeve 111 is provided on the support base 11, and a seat sliding rod 112 penetrating through the support sliding sleeve 111 is provided on the seat portion 2.

[0018] As described above, a connection mechanism between a seat portion and a support component, a seat locking mechanism 6 for locking the seat portion 2 and the support base 11 of the support component 1 to each other is provided between the seat portion 2 and the support base 11 of the support component 1; and a seat unlocking mechanism 7 for linking the unlocking action of the seat locking mechanism 6 is further included.

[0019] As described above, a connecting mechanism between a seat part and a support assembly, the seat locking mechanism 6 includes a seat locking rod 61 provided on the support base 11 and a seat locking buckle 62 slidably provided on the seat part 2 and used for clamping and cooperating with the seat locking rod 61. A buckle return elastic member 63 for driving the seat locking buckle 62 to elastically return is provided between the seat locking buckle 62 and the seat part 2, and the seat unlocking mechanism 7 is used to link the unlocking action of the seat locking buckle 62.

[0020] Compared with the prior art, the present utility model has the following advantages:

[0021] 1. In the present utility model, the push rod assembly can link the folding or unfolding actions of the seat part and the support assembly through the linkage assembly, so that the seat part and the support assembly approach and fold or rotate and unfold correspondingly, which has the characteristics of convenient folding and unfolding and easy operation. In addition, the overall structure of the vehicle after folding is more compact and the volume is minimized, meeting the requirements of users for carrying and storage, including meeting the size requirements for carrying and taking a plane after folding.

[0022] 2. The present utility model only needs a set of frame locking mechanism to cooperate with the linkage assembly to lock the overall frame, and at the same time only needs a set of frame unlocking mechanism to link the unlocking action of the frame locking mechanism to unlock the overall frame. Therefore, compared with the structure that requires at least two sets of frame locking mechanisms to lock the children's vehicle frame as a whole, the present utility model has the characteristics of relatively simple structure and low manufacturing cost. In addition, it can also realize the function of one-key unlocking and folding, which is convenient for users to operate and improves the market competitiveness.

[0023] 3. In order to ensure that the whole vehicle in the folded state stands stably and reliably and avoid the phenomenon of the whole vehicle standing unstably and tipping over, the end of the support assembly away from the seat part and the end of the push rod assembly away from the seat part correspondingly abut against the support surface so that the frame is in a standing state.

[0024] 4. In order to facilitate the user to lift the whole vehicle in the standing state, the armrest assembly is configured to be upwardly disposed for the user to lift when the frame is in the standing state.

[0025] 5. In order to improve the folding efficiency of the whole vehicle, a linkage return elastic member for driving the front linkage rod and the rear linkage rod to rotate and approach each other for folding is provided between the front linkage rod and the rear linkage rod.

Description of the Drawings

[0026] The following further details the specific embodiments of the present utility model with reference to the drawings, where:

[0027] Figure 1 is one of the perspective views of the present utility model when in the unfolded and in-use state.

[0028] Figure 2 This is the second perspective view of the present utility model when it is in the deployed and in-use state.

[0029] Figure 3 This is the third perspective view of the present utility model when it is in the deployed and in-use state.

[0030] Figure 4 This is the schematic side view structure diagram of the present utility model when it is in the deployed and in-use state.

[0031] Figure 5 This is the schematic side view structure diagram of the present utility model during the folding process.

[0032] Figure 6 This is the schematic side view structure diagram of the present utility model when it is in the folded and in-use state.

[0033] Figure 7 This is the exploded view of the present utility model.

[0034] Figure 8 This is the first exploded view of the push rod assembly of the present utility model.

[0035] Figure 9 This is the second exploded view of the push rod assembly of the present utility model.

Detailed implementation manner

[0036] The following will make a detailed description of the implementation manner of the present utility model in conjunction with the accompanying drawings.

[0037] Such as Figures 1-9As shown in the figure, a connecting mechanism between a seat part and a support assembly of the present utility model is applied to a baby carriage frame that can be switched between a deployed state and a folded state. The baby carriage frame includes a support assembly 1, a seat part 2, a push rod assembly 3, a linkage assembly 4, a frame locking mechanism, and a frame unlocking mechanism. The support assembly 1 is used for supporting and can be folded by approaching each other relatively; the seat part 2 is slidably arranged on the support assembly 1; the lower end of the push rod assembly 3 is movably connected to the support assembly 1 or the seat part 2; the linkage assembly 4 is located between the support assembly 1, the seat part 2, and the push rod assembly 3, and the linkage assembly 4 is configured to link the folding actions of the seat part 2 and the support assembly 1 when the push rod assembly 3 is switched from the deployed use state to the folded use state, so that the seat part 2 and the support assembly 1 approach and fold correspondingly; the frame locking mechanism is located on the frame and is used to lock the frame in the deployed use state; the frame unlocking mechanism is located on the frame and is used to link the unlocking action of the frame locking mechanism. In the present utility model, the push rod assembly can link the folding actions or unfolding actions of the seat part and the support assembly through the linkage assembly, so that the seat part and the support assembly approach and fold correspondingly or rotate and unfold correspondingly, which has the characteristics of convenient folding and unfolding and easy operation. In addition, the overall structure of the folded baby carriage is more compact and the volume is minimized, meeting the requirements of users for carrying and storing, including meeting the size requirements for carrying and taking a plane after folding.

[0038] The present utility model only needs a set of frame locking mechanism to cooperate with the linkage assembly to lock the overall frame. At the same time, only a set of frame unlocking mechanism is needed to link the unlocking action of the frame locking mechanism to unlock the overall frame. Therefore, compared with the structure that requires at least two sets of frame locking mechanisms to lock the baby carriage frame as a whole, the present utility model has the characteristics of relatively simple structure and lower manufacturing cost. In addition, the function of unlocking and folding with one key can also be realized, which is convenient for users to operate and improves the market competitiveness.

[0039] As Figure 6 shown, in order to ensure that the whole baby carriage stands stably and reliably in the folded state and avoid the phenomenon that the whole baby carriage stands unsteadily and topples over, when the frame is in the folded use state, one end of the support assembly 1 away from the seat part 2 and one end of the push rod assembly 3 away from the seat part 2 correspondingly abut against the support surface so that the frame is in a standing state.

[0040] As Figure 6 shown, in order to facilitate the user to lift the whole baby carriage in the standing state, an armrest assembly 5 is further included, and the armrest assembly 5 is configured to be arranged upward for the user to lift when the frame is in the standing state. As Figures 1-7 shown, in order to facilitate the linkage of the armrest assembly to unfold or fold correspondingly and improve the folding and unfolding efficiency, the lower part of the armrest assembly 5 is slidably and rotatably connected to the rear part of the seat part 2, and the middle part of the armrest assembly 5 is rotatably connected to the seat linkage rod 41.Figure 4 , 5 As shown, a handrail strip hole / handrail sliding groove is formed in the lower part of the handrail assembly 5, and a handrail connecting protrusion passing through the handrail strip hole / handrail sliding groove is provided at the rear of the seat part 2. When the handrail assembly is in the unfolded state, the handrail connecting protrusion and the lower end part of the handrail strip hole / handrail sliding groove are in blocking cooperation to limit the handrail assembly from moving upward continuously, thereby restricting the seat linkage rod 41 from moving upward continuously and keeping the seat linkage rod 41 in the unfolded state, which is convenient for unfolding. In addition, in order to facilitate the user to hold the infant into or out of the seat part and avoid the handrail assembly interfering with the user, the handrail assembly is detachably connected to the seat part 2 and the seat linkage rod 41, such as snap connection, plug connection, etc.

[0041] As Figures 1-7 shown, in order to better link the corresponding actions of the seat part, the lower end of the push rod assembly 3 is rotatably connected to the rear of the seat part 2; the linkage assembly 4 includes a seat linkage rod 41 and a push rod sliding member 42. The lower end of the seat linkage rod 41 is rotatably connected to the front of the seat part 2, the upper end of the seat linkage rod 41 is rotatably connected to the push rod sliding member 42, and the push rod sliding member 42 is slidably arranged on the push rod assembly 3; the vehicle frame locking mechanism is located between the push rod sliding member 42 and the push rod assembly 3 for locking the push rod sliding member 42 relative to the push rod assembly 3. As Figure 4 shown, when the whole vehicle is in the unfolded and used state, a triangular connection mechanism is formed among the seat linkage rod 41, the seat part 2 and the lower push rod 31 of the push rod assembly 3, which is beneficial to improving the structural stability of the whole vehicle and ensuring that the infant rides more safely and reliably.

[0042] As Figures 1-7 shown, in order to make the unfolding and folding of the whole vehicle smooth, the push rod sliding member 42 is a push rod sliding sleeve sleeved on the lower push rod 31.

[0043] As Figures 1-7As shown in the figure, in order to better link and support the corresponding actions of the components, the support component 1 includes a support base 11, a front foot rod 12 and a rear foot rod 13. The upper end of the front foot rod 12 is connected to the support base 11, and the upper end of the rear foot rod 13 is rotatably connected to the support base 11. The seat part 2 is slidably arranged on the support base 11. The linkage component 4 further includes a support linkage rod 43, a support linkage block 44, a front linkage rod 46 and a rear linkage rod 45. The front end of the front linkage rod 46 is rotatably connected to the front foot rod 12, the rear end of the front linkage rod 46 is rotatably connected to the front end of the rear linkage rod 45, the rear end of the rear linkage rod 45 is rotatably connected to the rear foot rod 13, the upper end of the support linkage rod 43 is connected to the push rod component 3 or rotatably connected to the rear part of the seat part 2, the middle part of the support linkage rod 43 is rotatably connected to the upper part of the rear foot rod 13, the lower end of the support linkage rod 43 is rotatably connected to the upper end of the support linkage block 44, and the lower end of the support linkage block 44 is rotatably connected to the rear linkage rod 45. As Figure 4 shown, when the vehicle is in the unfolded and in-use state, a triangular connection mechanism is formed among the front foot rod 12, the rear foot rod 13, the front linkage rod 46 and the rear linkage rod 45, which is beneficial to improving the structural stability of the whole vehicle and ensuring that the baby can sit more safely and reliably. As Figure 1 、 2 shown in Figures 4, 5 and 7, the support linkage rod 43 includes a first connection section 431 whose upper end is connected to the lower end of the lower push rod 31 or rotatably connected to the rear part of the seat part 2, and a second connection section 432 connected to the first connection section 431 and extending forward. The front end of the second connection section 432 is rotatably connected to the upper end of the support linkage block 44, and the connecting end of the first connection section 431 and the second connection section 432 is rotatably connected to the rear foot rod, which is beneficial to making the structure of the folded whole vehicle more compact and also more convenient for the action of the linkage support component.

[0044] As Figure 3 、 7 shown, in order to make the sliding between the support base 11 and the seat part 2 smooth, a support sliding sleeve 111 is arranged on the support base 11, and a seat sliding rod 112 is arranged on the seat part 2 and passes through the support sliding sleeve 111.

[0045] As Figure 1 、 2 shown, a linkage reset elastic member 47 for driving the front linkage rod 46 and the rear linkage rod 45 to rotate and approach each other for folding is arranged between the front linkage rod 46 and the rear linkage rod 45, and the linkage reset elastic member can be a linkage reset torsion spring placed between the front linkage rod 46 and the rear linkage rod 45.

[0046] As Figures 1-9As shown, in order to make the overall vehicle structure more compact after folding, the push rod assembly 3 includes a lower push rod 31 and an upper push rod 32. The lower end of the lower push rod 31 is rotatably connected to the rear part of the seat portion 2. The lower end of the upper push rod 32 is rotatably connected to the upper end of the lower push rod 31. An upper push rod locking mechanism 33 for locking the upper push rod 32 relative to the lower push rod 31 is provided between the lower end of the upper push rod 32 and the upper end of the lower push rod 31. An upper push rod unlocking mechanism 34 for linking the unlocking action of the upper push rod locking mechanism 33 is provided on the upper push rod 32. Among them, the upper push rod unlocking mechanism 34 includes, but is not limited to, an upper push rod unlocking button slidably provided on the upper push rod 32 and a button return spring for resetting the upper push rod unlocking button. The upper push rod locking mechanism 33 includes, but is not limited to, an upper push rod locking notch 331 provided at the upper end of the lower push rod 31 and an upper push rod locking block 332 slidably provided on the upper push rod 32 and capable of inserting into the upper push rod locking notch 331 to lock the upper push rod 32 relative to the lower push rod 31 in the unfolded state. A locking block return elastic member is provided between the upper push rod locking block 332 and the upper push rod. The upper push rod unlocking button is connected to the upper push rod locking block 332 through an unlocking pull rope. In some embodiments, the upper push rod locking mechanism 33 can also lock the upper push rod 32 relative to the lower push rod 31 in the folded and in-use state, ensuring that the various rods of the whole vehicle are locked to each other after folding, and avoiding the situation where the various rods collide and wear with each other, which affects handling, storage, etc.

[0047] As Figure 8 , 9 shown, in order to improve the folding efficiency and achieve automatic folding, a torsion spring / pull spring, etc. for making the upper push rod 32 flip forward relative to the lower push rod 31 is provided between the upper push rod 32 and the lower push rod 31.

[0048] As Figures 1-9 shown, in order to better link, the linkage assembly 4 includes a seat linkage rod 41 and a push rod slider 42. The lower end of the seat linkage rod 41 is rotatably connected to the front part of the seat portion 2. The upper end of the seat linkage rod 41 is rotatably connected to the push rod slider 42. The push rod slider 42 is slidably provided on the lower push rod 31. A sliding linkage member 421 for linking the corresponding sliding of the push rod slider 42 when the upper push rod 32 rotates and folds relative to the lower push rod 31 is provided between the push rod slider 42 and the upper push rod 32. The lower end of the sliding linkage member 421 is rotatably connected to the push rod slider 42. The upper end of the sliding linkage member 421 is rotatably connected to the upper push rod 32. In this embodiment, the frame locking mechanism and the frame unlocking mechanism can be realized by the sliding linkage member 421.

[0049] As Figure 3As shown in the figure, in order to better lock the seat part and the support seat to ensure safe and reliable use, a seat locking mechanism 6 for locking the two to each other is provided between the seat part 2 and the support seat 11 of the support assembly 1. A seat unlocking mechanism 7 for linking the unlocking action of the seat locking mechanism 6 is provided on the vehicle frame. The seat unlocking mechanism 7 is configured to be correspondingly linked by the upper push rod 32 during the process of the upper push rod 32 rotating and folding relative to the lower push rod 31, so that the seat unlocking mechanism 7 correspondingly links the unlocking action of the seat locking mechanism 6.

[0050] As Figure 3 , 8 , 9 shown, in order to ensure reliable locking and convenient unlocking, the seat locking mechanism 6 includes a seat locking rod 61 provided on the support seat 11 and a seat locking buckle 62 slidably provided on the seat part 2 and configured to be snap-fitted with the seat locking rod 61. A buckle return elastic member 63 for driving the seat locking buckle 62 to elastically return is provided between the seat locking buckle 62 and the seat part 2; the seat unlocking mechanism 7 includes a seat unlocking slider 71 slidably provided on the lower push rod 31 and a seat unlocking turntable 72 connected to move with the upper push rod 32 and capable of driving the seat unlocking slider 71 to slide correspondingly. The seat unlocking slider 71 is connected to the seat locking buckle 62 through a seat unlocking cable.

[0051] Folding principle:

[0052] The user presses the upper push rod unlocking button, and the upper push rod unlocking button pulls the upper push rod lock block 332 to slide upward relative to the upper push rod 32 through the unlocking cable, so that the locking end of the upper push rod lock block 332 is separated from the upper push rod locking notch 331, thereby releasing the locked state of the upper push rod 32 relative to the lower push rod 31. At this moment, the upper push rod 32 rotates forward and folds relative to the lower push rod 31 under the action of the flipping torsion spring / pulling spring, as Figure 5 shown;

[0053] During the process of the upper push rod 32 flipping and folding, the upper push rod 32 drives the seat unlocking slider 71 to slide upward relative to the upper push rod 31 through the seat unlocking turntable 72. The seat unlocking slider 71 pulls the seat locking buckle 62 to slide correspondingly relative to the seat part 2 through the seat unlocking cable, so that the seat locking buckle 62 is separated from the seat locking rod 61, thereby releasing the locked state between the seat part 2 and the support seat 11;

[0054] Meanwhile, during the folding process of the above-mentioned upper push rod 32 by flipping, the upper push rod 32 drives the push rod sliding member 42 to slide downward along the lower push rod 31 through the sliding linkage member 421. The lower push rod 31 rotates downward around the rotation axis between the lower end of the lower push rod 31 and the rear part of the seat portion 2 and moves closer to the rear foot rod 13 for folding. The lower push rod 31 drives the first connection section 431 of the support linkage rod 43 to rotate downward, then the second connection section 432 drives the front part of the rear linkage rod 45 to move upward through the support linkage block 44, so that the rear linkage rod 45 and the front linkage rod 46 move closer to each other for folding, and further the front foot rod 12 and the rear foot rod 13 move closer to each other for folding; in addition, during the above folding process, the support seat 11 slides from the rear part of the seat portion 2 to the front part of the seat portion 2, as Figure 6 shown, thus completing the folding operation of the whole vehicle, with the characteristics of one-key folding and convenient operation.

Claims

1. A connecting mechanism between a seat part and a support component, which is applied to a baby carriage frame that can be switched between a deployed state and a folded state, and is characterized in that include: A support assembly (1), the support assembly (1) is used for supporting and can be relatively folded together; A seat portion (2), wherein the seat portion (2) is slidably arranged on the support assembly (1); A linkage assembly (4), wherein the linkage assembly (4) is located between the support assembly (1) and the seat portion (2), and the linkage assembly (4) is configured to link the folding action of the seat portion (2) and the support assembly (1), thereby causing the seat portion (2) and the support assembly (1) to be folded together accordingly.

2. The connecting mechanism between the seat part and the support assembly according to claim 1, wherein The support assembly (1) comprises a support seat (11), a front foot rod (12) and a rear foot rod (13); the upper end of the front foot rod (12) is connected to the support seat (11), and the upper end of the rear foot rod (13) is connected to the support seat (11); The seat portion (2) is slidably arranged on the support seat (11); The linkage assembly (4) further comprises a supporting linkage rod (43), a supporting linkage block (44), a front linkage rod (46) and a rear linkage rod (45); the front end of the front linkage rod (46) is rotatably connected to the front foot rod (12); the rear end of the front linkage rod (46) is rotatably connected to the front end of the rear linkage rod (45); the rear end of the rear linkage rod (45) is rotatably connected to the rear foot rod (13); the upper end of the supporting linkage rod (43) is rotatably connected to the rear part of the seat part (2); the middle part of the supporting linkage rod (43) is rotatably connected to the upper part of the rear foot rod (13); the lower end of the supporting linkage rod (43) is rotatably connected to the upper end of the supporting linkage block (44); and the lower end of the supporting linkage block (44) is rotatably connected to the rear linkage rod (45).

3. The connecting mechanism between the seat part and the support assembly according to claim 2, characterized in that A linkage reset elastic member is provided between the front linkage rod (46) and the rear linkage rod (45) for driving the two to rotate relative to each other, close together and fold.

4. The connecting mechanism between the seat part and the support assembly according to claim 2, characterized in that The supporting linkage rod (43) comprises a first connecting section (431) whose upper end is rotatably connected to the rear of the seat portion (2) and a second connecting section (432) connected to the first connecting section (431) and extending forward, the front end of the second connecting section (432) is rotatably connected to the upper end of the supporting linkage block (44), and the connecting ends of the first connecting section (431) and the second connecting section (432) are rotatably connected to the rear foot rod (13).

5. The connecting mechanism between the seat part and the support assembly according to claim 2, characterized in that The support seat (11) is provided with a support sliding sleeve (111), and the seat portion (2) is provided with a seat sliding rod (112) which passes through the support sliding sleeve (111).

6. The connecting mechanism between a seat part and a support assembly according to any one of claims 1-5, characterized in that A seat locking mechanism (6) is provided between the seat portion (2) and the support base (11) of the support assembly (1) for locking the two together; and a seat unlocking mechanism (7) is also provided for linking the unlocking action of the seat locking mechanism (6).

7. The connecting mechanism between the seat part and the support assembly according to claim 6, characterized in that The seat locking mechanism (6) comprises a seat locking rod (61) arranged on the support seat (11) and a seat locking buckle (62) slidably arranged on the seat portion (2) and used for engaging with the seat locking rod (61); a buckle reset elastic member (63) for driving the seat locking buckle (62) to elastically reset is provided between the seat locking buckle (62) and the seat portion (2); and the seat unlocking mechanism (7) is used for linking the unlocking action of the seat locking buckle (62).

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