Baby carriage
By designing the relative rotation of the seat assembly and the wheel assembly and the linkage structure of the handle assembly in the baby stroller, the problem of low folding efficiency caused by interference between the seat and the handle is solved, and more efficient baby stroller folding and space utilization are achieved.
Patent Information
- Application Number
- CN202423099172.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-12-16
AI Technical Summary
The seat of the stroller may be at different angles after use, resulting in it taking up a large space when folded, and the seat may interfere with the handle, affecting folding efficiency.
A baby stroller is designed, including a seat assembly, a wheel assembly, a connecting piece, a handle assembly and a linkage piece. The seat assembly and the wheel assembly can rotate relative to each other through the connecting piece. The linkage piece enables the handle assembly to be transmission-connected to the rear wheel bracket, so that the seat assembly does not interfere with the handle assembly when in different directions. The handle assembly can be linked to the rear wheel bracket to rotate to achieve folding.
The folding efficiency of the baby stroller is improved, the occupied space is reduced, and the seat component is ensured not to interfere with the handle component when in different directions, thereby improving the use flexibility and stability of the baby stroller.
Smart Images
Figure CN223467189U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of baby carriage, especially to a baby carriage. BACKGROUND
[0002] Baby carriage is a vehicle designed for children, and baby carriage is often used to carry babies outside.
[0003] The baby carriage comprises a seat, a push handle and wheels, and the seat is connected with the push handle and the wheels, so that a guardian can hold the push handle and push the baby carriage to move, achieving the purpose of carrying the baby to go out.
[0004] In order to enable the baby sitting in the baby carriage to have different viewing angles when riding, the seat is usually designed as a horizontally rotatable structure. However, the rotatable seat may be at different angles after use, which occupies a large space when the baby carriage is idle, and the seat may interfere with the push handle when folding the baby carriage, so the baby carriage needs to be reset before folding, which reduces the folding efficiency. SUMMARY
[0005] The utility model aims at providing a baby carriage to solve the problem of low folding efficiency of the baby carriage.
[0006] To achieve this purpose, the utility model adopts the following technical scheme:
[0007] A baby carriage comprises a seat assembly, a wheel assembly, a connecting piece, a push handle assembly and a linkage. The wheel assembly comprises a front wheel support, a rear wheel support and a plurality of wheels, the plurality of wheels are respectively connected with the front wheel support and the rear wheel support, the wheel assembly has a folded state and an unfolded state, and the included angle between the front wheel support and the rear wheel support when the wheel assembly is in the folded state is smaller than the included angle between the front wheel support and the rear wheel support when the wheel assembly is in the unfolded state. The connecting piece is connected with the seat assembly and the front wheel support, so that the seat assembly can rotate relative to the wheel assembly. The push handle assembly is connected with the front wheel support. The linkage is connected with the push handle assembly and the rear wheel support, so that the push handle assembly and the rear wheel support are drivingly connected.
[0008] Preferably, the push handle assembly comprises an upper push handle and a lower push handle, one side of the upper push handle is selectively rotatably connected with the lower push handle, and the other side of the lower push handle is rotatably connected with the front wheel support.
[0009] Preferably, the length of the upper push handle is smaller than the length of the lower push handle.
[0010] Preferably, the width of the lower push handle is greater than the maximum width of the seat assembly.
[0011] As preferred, the linkage is a linkage rod, one end of which is rotatably connected with the lower push handle, and the other end of which is rotatably connected with the rear wheel support.
[0012] As preferred, the upper push handle is connected with an unlocking member for selectively rotating the upper push handle with the lower push handle.
[0013] As preferred, the connecting member comprises a rotating part and a mounting part, the seat assembly is connected with the rotating part, the rotating part is rotatably connected with the mounting part, and the mounting part is connected with the front wheel support.
[0014] As preferred, the seat assembly is detachably connected with the rotating part.
[0015] As preferred, the seat assembly comprises a seat plate and a footrest, the seat plate is connected with the connecting member, and the footrest is rotatably connected with the seat plate.
[0016] As preferred, the seat assembly further comprises a handle, both ends of the handle are selectively rotatably connected with the seat plate.
[0017] The utility model discloses beneficial effects:
[0018] A baby carriage comprises a seat assembly, a wheel assembly, a connecting member, a push handle assembly and a linkage, the wheel assembly comprises a front wheel support, a rear wheel support and a plurality of wheels, the plurality of wheels are connected with the front wheel support and the rear wheel support respectively, the wheel assembly has a folded state and an unfolded state, an included angle between the front wheel support and the rear wheel support when the wheel assembly is in the folded state is smaller than an included angle between the front wheel support and the rear wheel support when the wheel assembly is in the unfolded state; the connecting member is connected with the seat assembly and the front wheel support, so that the seat assembly can rotate relative to the wheel assembly; the push handle assembly is connected with the front wheel support; the linkage is connected with the push handle assembly and the rear wheel support, so that the push handle assembly and the rear wheel support are in transmission connection.
[0019] Therefore, under the action of the connecting member, the seat assembly can rotate around the vertical rotating shaft, the riding visual angle of the baby can be switched conveniently, when folding, the push handle assembly can drive the rear wheel support to rotate through the linkage, so that the folding of the push handle assembly and the wheel assembly can be realized, the baby carriage can be folded without interfering with the seat assembly in different directions, the occupied space of the baby carriage is reduced, and the folding efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 is the structure schematic diagram of the baby carriage in an embodiment of the utility model;
[0021] Figure 2 is the exploded view of the baby carriage in an embodiment of the utility model;
[0022] Figure 3 is a side view of the baby carriage in an embodiment of the present utility model;
[0023] Figure 4 is a first folding state view of the baby carriage in an embodiment of the present utility model;
[0024] Figure 5 is a second folding state view of the baby carriage in an embodiment of the present utility model
[0025] Figure 6 is a third folding state view of the baby carriage in an embodiment of the present utility model;
[0026] Figure 7 is a first steering state view of the seat assembly in an embodiment of the present utility model;
[0027] Figure 8 is a second steering state view of the seat assembly in an embodiment of the present utility model;
[0028] Figure 9 is a third steering state view of the seat assembly in an embodiment of the present utility model;
[0029] Figure 10 is a fourth folding state view of the baby carriage in an embodiment of the present utility model;
[0030] Figure 11 is a fifth folding state view of the baby carriage in an embodiment of the present utility model;
[0031] Figure 12 is a sixth folding state view of the baby carriage in an embodiment of the present utility model.
[0032] In the drawings:
[0033] 1, seat assembly; 11, seat plate; 12, footrest; 13, handle; 14, backrest; 2, wheel assembly; 21, front wheel support; 22, rear wheel support; 23, wheel; 3, connecting piece; 31, rotating part; 32, mounting part; 4, push handle assembly; 41, upper push handle; 42, lower push handle; 43, unlocking piece; 5, linkage. DETAILED DESCRIPTION
[0034] The present utility model will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, and not to limit the present utility model. In addition, it should be noted that, in order to facilitate the description, only the parts related to the present utility model are shown in the drawings, not all the structures.
[0035] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two element's mutual action relation. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0036] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features is not direct contact but is through the contact between other features between them.And, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the first feature horizontal height is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the first feature horizontal height is less than the second feature.
[0037] In the description of the embodiment, the terms "on", "under", "right", etc. Orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of description and simplification operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.
[0038] Referring to Figure 1 And Figure 2 , the utility model provides a baby carriage, including seat subassembly 1, wheel assembly 2, connecting piece 3, push handle subassembly 4 and linkage 5, wheel assembly 2 includes front wheel support 21, rear wheel support 22 and multiple wheels 23, multiple wheels 23 are connected with front wheel support 21, rear wheel support 22 respectively, wheel assembly 2 has folding state and unfolded state, the included angle of front wheel support 21 and rear wheel support 22 when wheel assembly 2 is located in folding state is less than the included angle of front wheel support 21 and rear wheel support 22 when wheel assembly 2 is located in unfolded state;Connecting piece 3 is connected with seat subassembly 1, front wheel support 21, to make seat subassembly 1 can be relatively rotated with wheel assembly 2;Push handle subassembly 4 is connected with front wheel support 21;Linkage 5 is connected with push handle subassembly 4, rear wheel support 22, to make push handle subassembly 4 and rear wheel support 22 transmission connection.
[0039] In the embodiment, the front wheel support 21 and the rear wheel support 22 are respectively rotatably connected with two wheels 23, and the diameter of the wheel 23 connected with the front wheel support 21 is smaller than that of the wheel 23 connected with the rear wheel support 22. The front wheel support 21 and the rear wheel support 22 are rotatably connected, and rotate in directions away from each other when the wheel assembly 2 is switched from the folded state to the unfolded state. The connecting member 3 is arranged below the seat assembly 1, and the push handle assembly 4 is rotatably connected with the front wheel support 21.
[0040] In this way, the seat assembly 1 can rotate horizontally around the vertical rotation shaft under the action of the connecting member 3, so as to switch the sitting angle of the baby. When the push handle assembly 4 is rotated, the push handle assembly 4 drives the rear wheel support 22 to rotate, and the front wheel support 21 is also rotated, so that the front wheel support 21, the rear wheel support 22 and the push handle assembly 4 are close to each other. When the seat assembly 1 is located in different directions, the stroller can be folded without interfering with the seat assembly 1, the occupied space of the stroller is reduced, and the folding efficiency is improved.
[0041] It can be understood that the wheels 23 can be provided with brakes, the maximum rotation angle of the seat assembly 1 can be 180° or 360°, and the front wheel support 21 and the rear wheel support 22 can be connected with a locking tooth structure to limit the angle of the front wheel support 21 and the rear wheel support 22. The embodiment does not limit this.
[0042] It should be noted that the rotation limiting of the wheels 23 and the rotation limiting between the front wheel support 21 and the rear wheel support 22 are both prior art, and the specific limiting structure can be flexibly adjusted according to actual design needs, which will not be enumerated here.
[0043] Referring to Figure 1 , in some embodiments, the push handle assembly 4 includes an upper push handle 41 and a lower push handle 42. One side of the upper push handle 41 is selectively rotatably connected with the lower push handle 42, and the other side of the lower push handle 42 is rotatably connected with the front wheel support 21.
[0044] In the embodiment, the push handle assembly 4 has a folded state and an unfolded state. When the push handle assembly 4 is switched from the unfolded state to the folded state, the upper push handle 41 rotates in a direction close to the seat assembly 1, and the lower push handle 42 rotates in a direction close to the rear wheel support 22. Under the action of the linkage 5, the lower push handle 42 and the rear wheel support 22 gradually rotate until they are close to each other.
[0045] In this way, the upper push handle 41 and the lower push handle 42 are rotatably connected, which can shorten the length of the push handle assembly 4 after the stroller is folded, make the structure more compact, further reduce the occupied space, and improve the folding effect. Since the lower push handle 42 is rotatably connected with the front wheel support 21, the seat assembly 1 is less likely to interfere with the lower push handle 42 and the upper push handle 41 during folding, thereby improving the folding efficiency and folding effect.
[0046] It can be understood that the upper push handle 41 and the lower push handle 42 can also be fixedly connected, that is, the upper push handle 41 and the lower push handle 42 cannot be folded; when the push handle assembly 4 is in the folded state, the upper push handle 41 and the lower push handle 42 can be arranged in parallel or at an angle, and a locking tooth structure can be arranged at the connection between the upper push handle 41 and the lower push handle 42 to limit the rotation between the upper push handle 41 and the lower push handle 42 when the push handle assembly 4 is in the folded state or the unfolded state, thereby improving the stability and safety of the stroller, which will not be described here.
[0047] Referring to Figure 1 , in some embodiments, the length of the upper push handle 41 is less than the length of the lower push handle 42.
[0048] In this way, when a guardian of different body shape and height uses the stroller, the position of the upper push handle 41 can be changed by rotating the upper push handle 41, so as to improve the pushing effect of the stroller and further make the movement of the stroller more stable and flexible.
[0049] It can be understood that the length of the upper push handle 41 can also be equal to or greater than the length of the lower push handle 42, which can achieve stable pushing of the stroller and no interference with other structures after folding, which will not be described here.
[0050] Referring to Figure 1 , in some embodiments, the width of the lower push handle 42 is greater than the maximum width of the seat assembly 1, that is, the seat assembly 1 is arranged in the middle of the lower push handle 42. In this embodiment, the width of the lower push handle 42 is greater than the width of the front wheel support 21.
[0051] In this way, the seat assembly 1 is less likely to interfere with the lower push handle 42 when rotating relative to the front wheel support 21, and is less likely to affect the folding of the push handle assembly 4 and the wheel assembly 2, thereby improving the folding efficiency; and the seat assembly 1 is arranged in the middle of the lower push handle 42, which can also improve the structural strength of the seat assembly 1 and improve the safety of the stroller.
[0052] Referring to Figure 2 , in some embodiments, the linkage 5 is a linkage rod, one end of the linkage rod is rotatably connected with the lower push handle 42, and the other end is rotatably connected with the rear wheel support 22. In this embodiment, the linkage rod is a straight rod structure.
[0053] In this way, referring to Figures 3-6 , when the lower push handle 42 rotates in the direction towards the rear wheel support 22, the lower push handle 42 and the rear wheel support 22 gradually converge under the linkage action of the linkage rod, thereby saving the step of manually rotating the rear wheel support 22 and further improving the folding efficiency.
[0054] It can be understood that the connection between the lower push handle 42 and the front wheel support 21 can also be provided with a locking structure to limit the relative position of the lower push handle 42 and the front wheel support 21, and further limit the position of the rear wheel support 22 and the front wheel support 21. The locking structure can be a locking tooth structure, or other structures with locking function, such as bolts, pins, etc. The specific structure of the locking structure can be flexibly adjusted, as long as it can achieve limiting, which is not limited in the embodiment.
[0055] Referring to Figure 1 In some embodiments, the upper push handle 41 is connected with an unlocking member 43 for selectively rotating the upper push handle 41 and the lower push handle 42.
[0056] In the embodiment, the unlocking member 43 is a spring button, which is connected with a traction line (not shown in the figure), and the end of the traction line away from the spring button is connected with a locking pin (not shown in the figure). The traction line can control the connection state of the upper push handle 41 and the lower push handle 42 by pulling the locking pin, so that the upper push handle 41 and the lower push handle 42 can be selectively rotated.
[0057] In this way, the upper push handle 41 and the lower push handle 42 can be locked or unlocked according to actual needs through the unlocking member 43, avoiding the upper push handle 41 and the lower push handle 42 from continuing to rotate after being folded, and improving the stability of the stroller in the folded state or the unfolded state.
[0058] It can be understood that the relative position of the upper push handle 41 and the lower push handle 42 is limited by the locking member, which is prior art. The specific structure of the locking member can be adjusted according to actual needs, and is not limited to the spring button, which will not be enumerated here.
[0059] Referring to Figure 2 In some embodiments, the connecting member 3 includes a rotating part 31 and a mounting part 32, the seat assembly 1 is connected with the rotating part 31, the rotating part 31 is rotationally connected with the mounting part 32, and the mounting part 32 is connected with the front wheel support 21.
[0060] In the embodiment, the rotating part 31 is a disc structure, and the mounting part 32 is a straight rod structure. The rotating part 31 is arranged on the side of the mounting part 32 facing the seat assembly 1 and is rotationally connected with the mounting part 32 through a rotating shaft (not shown in the figure). The mounting part 32 is rotationally connected with the side of the front wheel support 21 on which the two ends of the mounting part 32 are close to each other. The seat assembly 1 is arranged on the side of the rotating part 31 away from the mounting part 32.
[0061] Therefore, the mounting portion 32 and the rotating portion 31 can stably support the seat assembly 1, and the force of the seat assembly 1 can be uniformly transmitted to the front wheel support 21 and the rear wheel support 22, thereby improving the stability of the stroller. The rotating portion 31 can drive the seat assembly 1 to rotate, so that the relative position of the seat assembly 1 and the front wheel support 21 changes, and the seat assembly 1 is not easy to interfere with the front wheel support 21, the rear wheel support 22 and the handle assembly 4, thereby facilitating folding and unfolding of the stroller and improving the folding effect.
[0062] It can be understood that the two ends of the mounting portion 32 can also be fixedly connected or detachably connected to the side surface of the front wheel support 21, and the connection mode of the mounting portion 32 and the front wheel support 21 can be flexibly adjusted according to actual design needs, which will not be described herein.
[0063] Referring to Figure 2 , in some embodiments, the seat assembly 1 is detachably connected to the rotating portion 31.
[0064] Therefore, the seat assembly 1 can be detached when the stroller is folded, thereby facilitating separate storage and further reducing the occupied space. In addition, different specifications of the seat assembly 1 can be replaced according to the size of the baby, thereby improving the flexibility of the stroller.
[0065] It can be understood that the seat assembly 1 and the rotating portion 31 can be detachably connected through bolts, pins, buckles and the like. Alternatively, the seat assembly 1 can be fixedly connected to the rotating portion 31, and the specific connection mode of the seat assembly 1 and the rotating portion 31 can be flexibly adjusted, so that the stroller can be quickly folded and stably placed on the ground, which will not be described herein.
[0066] Referring to Figure 2 , in some embodiments, the seat assembly 1 includes a seat plate 11 and a footrest 12. The seat plate 11 is connected to the connecting piece 3, and the footrest 12 is rotationally connected to the seat plate 11. In this embodiment, the seat plate 11 is detachably connected to the rotating portion 31. The seat assembly 1 further includes a backrest 14, which is rotationally connected to one end of the seat plate 11 away from the footrest 12. The backrest 14 and the footrest 12 are arranged on the two sides of the rotating portion 31, respectively.
[0067] Therefore, by arranging the footrest 12 and the backrest 14, the riding comfort of the stroller can be improved. When the stroller needs to be folded, the footrest 12 and the backrest 14 are rotated towards the seat plate 11, so that the footrest 12, the backrest 14 and the seat plate 11 are close to each other, thereby facilitating further folding and storage, improving the folding efficiency, reducing the occupied space of the stroller, and avoiding interference with the folding of the wheel assembly 2 and the handle assembly 4.
[0068] It can be understood that the connection between the backrest 14 and the seat plate 11, and the connection between the footrest 12 and the seat plate 11 can be provided with a locking member to limit the relative position of the backrest 14 and the seat plate 11, which is not limited in the embodiment.
[0069] Referring to Figure 1 , in some embodiments, the seat assembly 1 further comprises a handle 13, both ends of which are selectively rotatably connected with the seat plate 11. In the embodiment, the handle 13 is arranged upwardly inclined relative to the seat plate 11 and can be rotated in the direction close to or away from the seat plate 11.
[0070] It should be noted that, referring to Figures 7-9 , the seat assembly 1 has an unfolded state, a folded state and a steering state. When the seat assembly 1 is in the unfolded state, the footrest 12 is located below the seat plate 11, and the footrest 12, the handle 13 and the backrest 14 are all arranged at an angle with the seat plate 11. When the seat assembly 1 is in the folded state, the handle 13, the seat plate 11 and the backrest 14 are arranged close together, and the footrest 12 is arranged parallel to the seat plate 11. When the seat assembly 1 is in the steering state, the footrest 12 is rotated above the seat plate 11, which facilitates the rotation of the seat assembly 1 to the forward direction (i.e., the footrest 12 and the front wheel support 21 are located on the same side) or the backward direction (i.e., the footrest 12 and the rear wheel support 22 are located on the same side).
[0071] Thus, referring to Figures 10-12 , the seat assembly 1 is independently folded and reversed, which can reduce the interference with the wheel assembly 2 and the handle assembly 4, and enable the folding of the wheel assembly 2 and the handle assembly 4 when the seat assembly 1 is located in different directions, thereby improving the flexibility and folding efficiency of the stroller.
[0072] It can be understood that the connection between the handle 13 and the seat plate 11 can also be provided with a locking member, which is not described herein.
[0073] The folding process of the stroller is as follows:
[0074] First, the seat assembly 1 is folded, i.e., the backrest 14, the handle 13 and the seat plate 11 are arranged close together, the footrest 12 is rotated parallel to the seat plate 11, and the folded seat assembly 1 is rotated downward so as to be arranged close to the front wheel support 21. The upper handle 41 is rotated toward the lower handle 42, and the lower handle 42 is rotated toward the rear wheel support 22. Under the action of the linkage 5, the rear wheel support 22 and the lower handle 42 are arranged close together, and the front wheel support 21 is rotated to be close to the rear wheel support 22, so as to realize the folding of the stroller as a whole.
[0075] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.
Claims
1. A stroller, characterized in that, The utility model relates to a folding stroller, comprising: a seat assembly (1); a wheel assembly (2) comprising a front wheel support (21), a rear wheel support (22) and a plurality of wheels (23) connected to the front wheel support (21) and the rear wheel support (22) respectively, the wheel assembly (2) having a folded state and an unfolded state, the angle between the front wheel support (21) and the rear wheel support (22) in the folded state being smaller than the angle between the front wheel support (21) and the rear wheel support (22) in the unfolded state; a connecting member (3) connected to the seat assembly (1) and the front wheel support (21) to allow the seat assembly (1) to rotate relative to the wheel assembly (2); a handlebar assembly (4) connected to the front wheel support (21); a linkage member (5) connected to the handlebar assembly (4) and the rear wheel support (22) to allow the handlebar assembly (4) and the rear wheel support (22) to be drivingly connected.
2. The stroller of claim 1, wherein, The handlebar assembly (4) comprises an upper handlebar (41) and a lower handlebar (42), one side of the upper handlebar (41) being selectively rotatably connected to one side of the lower handlebar (42), and the other side of the lower handlebar (42) being rotatably connected to the front wheel support (21).
3. The stroller of claim 2, wherein, The length of the upper handlebar (41) is smaller than the length of the lower handlebar (42).
4. The stroller of claim 2, wherein, The width of the lower handlebar (42) is greater than the maximum width of the seat assembly (1).
5. The stroller of claim 2, wherein, The linkage member (5) is a linkage rod, one end of the linkage rod being rotatably connected to the lower handlebar (42) and the other end of the linkage rod being rotatably connected to the rear wheel support (22).
6. The stroller of claim 2, wherein, The upper handlebar (41) is provided with an unlocking member (43) for selectively rotating the upper handlebar (41) relative to the lower handlebar (42).
7. The stroller of any of claims 1-6, wherein, The connecting member (3) comprises a rotating portion (31) and a mounting portion (32), the seat assembly (1) being connected to the rotating portion (31), the rotating portion (31) being rotatably connected to the mounting portion (32), and the mounting portion (32) being connected to the front wheel support (21).
8. The stroller of claim 7, wherein, The seat assembly (1) is detachably connected to the rotating portion (31).
9. The stroller of any of claims 1-6, wherein, The seat assembly (1) comprises a seat plate (11) and a footrest (12), the seat plate (11) being connected to the connecting member (3), and the footrest (12) being rotatably connected to the seat plate (11).
10. The stroller of claim 9, wherein, The seat assembly (1) further comprises a handle (13), both ends of the handle (13) being selectively rotatably connected to the seat plate (11).