Baby stroller damper device, seat and baby stroller

Abstract

The present disclosure provides a damper device, a stroller seat, and a stroller. The damper device is disposed on a first pipe and a second pipe that are parallel to each other of a seat pipe of the stroller, and supports a seat part of the stroller. The damper device includes a bracket structure rotatably connected to the first pipe and the second pipe. The bracket structure is disposed such that a damper elastic element elastically prevents the bracket structure from rotating relative to the first pipe and the second pipe, thereby retarding the downward movement of the seat part. The damper device of the stroller of the present disclosure allows the stroller to obtain a better damping effect.

Description

Cross-reference to Related Inventions

[0001] This application is the national phase application of PCT / EP 2023 / 050776 entitled "Vibration Damping Device, Seat and Stroller for Stroller", filed on January 13, 2023, and claims the benefit of Chinese Application No. 202210046772.3 filed on January 14, 2022, both of which are incorporated herein by reference in their entirety.

Technical Field

[0002] The present disclosure relates to a damper device for a stroller, a seat, and a stroller.

Background Art

[0003] Generally, strollers are used to take children outdoors. With the development of technology, the requirements for strollers are also increasing. Existing strollers generally do not have a damper structure on the seat. Therefore, when the stroller travels on an uneven road, the child sitting in the stroller may feel uncomfortable and it may affect the riding comfort. For this reason, a seat with elastic wires has been proposed, but although this seat can obtain a certain damping effect, it cannot obtain a sufficient damping effect. In addition, since only one wire is provided on the seat plate, the strength of the seat plate is insufficient and the endurance is weak.

[0004] Therefore, it is necessary to develop a damper device for a stroller that can avoid the above problems in the prior art.

Summary of the Invention

Problems to be Solved by the Invention

[0005] In view of the above drawbacks of the prior art, an object of the present disclosure is to provide a damper device for a stroller that enables the stroller to achieve a better damping effect.

[0006] As embodied and generally described herein, to achieve these advantages and other advantages, and in accordance with the purpose of the present disclosure, a damper device for a baby stroller is provided. The damper device is disposed on a first pipe and a second pipe that are parallel to each other in a seat pipe of the baby stroller and carries a seat portion of the baby stroller. The damper device includes a bracket structure rotatably connected to the first pipe and the second pipe, and the bracket structure is arranged such that the damper elastic element elastically prevents the bracket structure from rotating with respect to the first pipe and the second pipe to slow down the downward movement of the seat portion.

Means for Solving the Problems

[0007] In one embodiment, the bracket structure includes a damper pipe and a damper sleeve. The damper pipe has a fixed end that abuts against the lower surface of the seat portion and is rotatably connected to the first pipe, and a free end that is higher than the second pipe. The damper sleeve has a first end rotatably connected to the second pipe and a second end slidably and rotatably connected to the damper pipe. The damper sleeve is arranged to be driven to rotate downward with respect to the second pipe when the damper pipe is pushed downward and rotates downward with respect to the first pipe. Here, the damper elastic element is a separate member from the damper pipe and the damper sleeve, and the damper elastic element is arranged to apply a damping force to the damper pipe and / or the damper sleeve when the damper pipe and the damper sleeve rotate downward.

[0008] In one embodiment, a connection sleeve slidable along the damper pipe is provided on the damper pipe, and the second end of the damper sleeve is rotatably connected to the connection sleeve such that the second end of the damper sleeve is indirectly rotatably connected to the damper pipe.

[0009] In one embodiment, the connection sleeve is provided with a lateral pin hole in the damper pipe, the second end of the damper sleeve is provided with a pin connection hole, a part of the damper pipe surrounded by the connection sleeve is provided with an elongated slot-shaped slide hole, and the pin sequentially penetrates through the pin connection hole, the pin hole and the slide hole.

[0010] In one embodiment, the connection sleeve is provided with a damper sleeve hole through which the damper pipe slides, a lateral connection column is provided on the damper pipe at a position where the pin hole of the connection sleeve is provided, the pin hole penetrates through the connection column, a second sleeve hole through which the second pipe penetrates is provided at the first end of the damper sleeve, two limit bosses are provided at the second end of the damper sleeve, the pin connection hole is formed by penetrating through the two limit bosses, a limit groove is defined between the two limit bosses, and a part of the connection sleeve where the connection column is provided is accommodated in the limit groove.

[0011] In one embodiment, the damper elastic element is a torsion spring, the first end of the torsion spring is a pressing portion acting on the damper pipe, the second end of the torsion spring is a hook portion engaging with an engaging hole of the damper sleeve, a ring-shaped collar wound by a spring wire of the torsion spring is provided between the pressing portion and the hook portion, and the collar is provided on the connection column of the connection sleeve.

[0012] In one embodiment, a boss is provided at the lower part of the connection sleeve, a rotation hole is provided in the boss, the pin connection hole is provided at the second end of the damper sleeve, and the pin sequentially penetrates through the pin connection hole and the rotation hole of the boss.

[0013] In one embodiment, an elongated slot-shaped slide hole is provided in a portion of the damper pipe rotatably connected to the damper sleeve. The pin connection hole is provided at the second end of the damper sleeve. The pin passes through the pin connection hole and the slide hole, so that the second end of the damper sleeve is directly rotatably connected to the damper pipe.

[0014] In one embodiment, the damper elastic element is a tension spring, a compression spring, a hydraulic rod or a pneumatic rod acting on the damper pipe and / or the damper sleeve to generate a damping force in response to downward rotation of the damper pipe and the damper sleeve.

[0015] In one embodiment, the bracket structure of the damper device includes a damper pipe and a damper sleeve. The damper pipe abuts against the lower surface of the seat portion and has a fixed end rotatably connected to the first pipe and a free end higher than the second pipe. The damper sleeve has a first end rotatably connected to the second pipe and a second end rotatably connected to the damper pipe. Here, the damper elastic element is a hydraulic rod or a pneumatic rod forming a part of the damper sleeve. When the damper sleeve is pressed downward and rotated downward around the first pipe, the damper sleeve is driven to rotate downward around the second pipe, and the hydraulic rod or the pneumatic rod forming a part of the damper sleeve applies a damping force to the damper pipe.

[0016] In another aspect, the present disclosure also provides a baby stroller seat, the seat comprising the damper device described above.

[0017] In yet another aspect, the present disclosure also provides a baby stroller, the baby stroller comprising a frame and a seat disposed on the frame, the seat comprising the damper device described above. As a beneficial effect of the present disclosure, the damper device of the stroller can achieve a better damper effect by preventing the rotation of the bracket structure and delaying the downward movement of the seat part.

Brief Description of the Drawings

[0018] The above and other objects, features, aspects, and advantages of the present disclosure will become more apparent by the following detailed description with reference to the accompanying drawings.

Figure 1

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Modes for Carrying Out the Invention

[0019] Hereinafter, embodiments will be described in detail with reference to the drawings. Terms such as "first" and "second" may be used to describe various elements, but it will be understood that these elements are not limited to these terms. These terms are usually only used to distinguish one component from another. Furthermore, terms specifically defined in consideration of the configuration and operation of the embodiments are used only for describing the embodiments and do not limit the scope of the embodiments.

[0020] FIG. 1 and FIG. 2 show a frame of a stroller using a damper device according to an embodiment of the present disclosure. The frame of the stroller includes a seat pipe 100 for a seat portion and a backrest pipe for a backrest portion. The seat pipe 100 has a frame structure composed of a first pipe 101, a second pipe 102, and two connecting pipes connected therebetween.

[0021] The damper device in the present disclosure is provided on the first pipe 101 and the second pipe 102 and is used for placing the seat portion of the stroller. In this specification, the direction in which the stroller faces is defined as the front direction, and the direction in which the stroller backs is defined as the rear direction. As shown in FIGS. 1 and 2, the first pipe 101 is a front pipe, and the second pipe 102 is a rear pipe. However, the present disclosure is not limited thereto. The first pipe 101 may be a rear pipe, and the second pipe 102 may be a front pipe. Also, the first pipe 101 and the second pipe 102 may be two side pipes connecting the front pipe and the rear pipe.

[0022] The damper device includes a bracket structure rotatably connected to a first pipe 101 and a second pipe 102, and a damper elastic element 30. The bracket structure is arranged to slow down the downward movement of the seat part by elastically preventing the bracket structure from rotating relative to the first pipe 101 or the second pipe 101 by the damper elastic element 30. The present disclosure enables the baby stroller to achieve a more stable and gentle damper effect compared to a method of directly preventing the downward movement of the seat by slowing down the downward movement of the seat part by preventing the rotation of the bracket structure and applying resistance in the vertical direction.

[0023] The bracket structure includes a damper pipe 10 and a damper sleeve 20. The damper pipe 10 and the damper sleeve 20 are connected to each other and form a bracket structure (shown in FIGS. 3 and 4) that can move up and down. The damper elastic element 30 applies a damping force to the bracket structure in response to the downward movement of the bracket structure. Before the child sits on the seat part of the baby stroller, the damper elastic element 30 pushes up the bracket structure formed by the damper pipe 10 and the damper sleeve 20. After the child sits on the seat part of the baby stroller, the damper pipe 10 in contact with the lower surface of the seat part of the baby stroller is pressed downward and rotates downward, driving the damper sleeve 20 to rotate downward. At this time, the damper elastic element 30 applies a damping force to the damper pipe 10 and / or the damper sleeve 20 to reduce the vibration of the seat part of the baby stroller. In particular, when the baby stroller is driving on a bumpy road, the child's buttocks may bounce up and down. During the falling process, the damper elastic element 30 can provide a good damper effect to the seat part of the baby stroller, avoid the buttocks from receiving excessive impact and affecting the riding comfort. Also, the support strength of the seat pipe of the baby stroller using the damper device is sufficient. Moreover, after the seat fabric is covered, not only can the riding comfort be further improved, but the normal service life of the seat fabric can be guaranteed without increasing the stress of the seat fabric.

[0024] Next, the components of the damper device will be described in detail. The damper pipe 10 has a fixed end 10a and a free end 10b. The fixed end 10a is rotatably connected to the first pipe 101, and the free end 10b is higher than the second pipe 102. As a result, the plane defined by the damper pipe 10 and the first pipe 101 forms a certain angle with respect to the plane defined by the second pipe 102 and the first pipe 101. In the embodiment shown in FIG. 1, the fixed end 10a is rotatably connected to the first pipe 101 via a pipe joint 103. Of course, the fixed end 10a may be directly rotatably connected to the first pipe 101.

[0025] Also, the damper pipe 10 shown in FIGS. 1, 2, and 5 is a U-shaped pipe. The open ends of the U-shaped pipe are two fixed ends 10a, which are rotatably connected near both ends of the first pipe 101, and the connection end of the other end is the free end 10b that is higher than the second pipe 102. The U-shaped damper pipe 10 and the first pipe 101 form a substantially square shape so as to uniformly support the sheet portion. Of course, the damper pipe 10 may have other shapes such as a V-shaped pipe or a straight pipe shape, and the effect of the damper pipe 10 can also be obtained. When the damper pipe 10 has a straight pipe shape, its fixed end 10a is preferably rotatably connected to the central portion of the first pipe 101.

[0026] In order to keep the plane defined by the damper pipe 10 and the first pipe 101 at a certain angle with respect to the plane defined by the second pipe 102 and the first pipe 101, the damper device 100 further includes a damper sleeve 20 that forms a bracket structure together with the damper pipe 10.

[0027] Referring to FIG. 1, the first end 20a of the damper sleeve 20 is rotatably connected to the second pipe 102, and the second end 20b is slidably and rotatably connected to the damper pipe 10. Thus, when the damper pipe 10 is pushed downward and rotates downward around the first pipe 101, the damper sleeve 20 is also driven to rotate downward around the second pipe 102. In this specification, "(the second end 20b of the damper sleeve 20) is slidably and rotatably connected to the damper pipe 10" means that the second end 20b of the damper sleeve 20 is slidable along the damper pipe 10 and at the same time the damper sleeve 20 is rotatable around the second end 20 with respect to the damper pipe 10.

[0028] The reason why the second end 20b of the damper sleeve 20 is slidably and rotatably connected to the damper pipe 10 will be described below with reference to FIGS. 3 and 4.

[0029] As shown in FIG. 3, the damper sleeve 20 is rotatably connected to the damper pipe 10 via a pin 40 passing through its second end 20b, and the pin 40 forms a pivot point between the damper sleeve 20 and the damper pipe 10. Since the distance between the first pipe 101 and the second pipe 102 and the interval between the pivot point 40 and the second pipe 102 (i.e., the length of the damper sleeve 20) are constant, if the interval between the pivot point and the first pipe 101 is also constant, the triangle formed by the first pipe 101, the second pipe 102, and the pivot point is constant. In this case, the damper pipe 10 and the damper sleeve 20 cannot rotate, and the bracket structure formed by the damper pipe 10 and the damper sleeve 20 cannot move up and down.

[0030] Therefore, the pivot point 40 needs to be slidable relative to the damper pipe 10 such that the distance between the pivot point 40 and the first pipe 101 is variable. As shown in FIG. 4, when the pivot point 40 is slidable between the first position P1 and the second position P2, the triangle formed by the first pipe 101, the second pipe 102, and the pivot point 40 is variable. In this case, the damper pipe 10 and the damper sleeve 20 can rotate, and the bracket structure formed by the damper pipe 10 and the damper sleeve 20 can move up and down to provide a damping and buffering effect.

[0031] In order to make the second end 20b of the damper sleeve 20 and the pin 40 (i.e., the pivot point 40) passing through it slidable relative to the damper pipe 10, the present disclosure can adopt various embodiments.

[0032] As shown in FIG. 1, the damper pipe 10 is provided with a connection sleeve 50 that is slidable along the damper pipe 10, and the second end 20b of the damper pipe 20 is rotatably connected to the connection sleeve 50. In this case, the second end 20b of the damper pipe 20 is indirectly rotatably connected to the damper pipe 10 via the connection sleeve 50.

[0033] In the first embodiment of the damper device of the present disclosure, the connection sleeve 50 is provided with a lateral pin hole 51 (see FIG. 6) in the damper pipe 10, the second end 20b of the damper pipe 20 is provided with a pin connection hole 21 (see FIG. 7), and an elongated groove-shaped slide hole 11 (see FIG. 5) is provided in a part of the damper pipe 10 surrounded by the connection sleeve 50. The pin 40 sequentially passes through the pin connection hole 21 of the damper sleeve 20, the pin hole 51 of the connection sleeve 50, and the slide hole 11 of the damper pipe 10, and functions as a pivot point between the damper sleeve 20 and the damper pipe 10. On the other hand, the pin 40 is slidable within the elongated groove-shaped slide hole 11 such that the pivot point 40, that is, the second end 20b of the damper sleeve 20 is slidable with respect to the damper pipe 10.

[0034] FIG. 6 shows a connection sleeve in the first embodiment of the damper device according to the present disclosure. The connection sleeve 50 has a damper sleeve hole 52 through which the damper pipe 10 slides. At the position where the pin hole 51 of the connection sleeve 50 is provided, a lateral connection column 53 is provided on the damper pipe 10. The pin hole 51 passes through the connection column 53 so as to support the pin 40 after the pin 40 passes through the pin hole 51.

[0035] FIG. 7 shows the damper sleeve 20 in the first embodiment of the damper device according to the present disclosure, which is adapted to the connection sleeve 50 shown in FIG. 6. A second sleeve hole 22 is provided at the first end 20a of the damper sleeve 20, the second pipe 102 passes through the second sleeve hole 22, two limit bosses 23 are provided at the second end 20b of the damper sleeve 20, and the pin connection hole 21 is formed by passing through the two limit bosses 23. A limit groove 24 is defined between the two limit bosses 23, and the portion where the connection column 53 of the connection sleeve 50 is provided is received in the limit groove 24.

[0036] In this embodiment, the pin 40 is supported by the connection column 53 of the connection sleeve 50 so as to slide within the slide hole 11 on the damper pipe 10, avoiding affecting the lifespan due to the contact friction between the pin 40 and the slide hole 11.

[0037] Of course, the present disclosure is not limited thereto. The damper device in the present disclosure can simplify the structure in addition to the first embodiment, and can adopt a second embodiment in which the connection sleeve 50 is not provided on the damper pipe 10. In the second embodiment with a simplified structure, an elongated groove-shaped slide hole 11 is provided at a portion of the damper sleeve 20 of the damper pipe 10 that is rotatably connected, and a pin connection hole 21 is provided at the second end 20b of the damper sleeve 20. The pin 40 sequentially penetrates the pin connection hole 21 and the slide hole 11 and functions as a pivot point between the damper sleeve 20 and the damper pipe 10. In this case, the second end 20b of the damper sleeve 20 is directly rotatably connected to the damper pipe 10.

[0038] Since the pin 40 can also slide within the elongated groove-shaped slide hole 11, in the second embodiment having a simplified structure, it is also possible to realize the sliding of the second end 20b of the damper sleeve 20, that is, the pivot point 40, with respect to the damper pipe 10. However, since the contact friction between the pin 40 and the slide hole 11 affects the lifespan, the slide hole 11 may be provided with a wear-resistant coating, or a slide block (not shown) having a slide groove may be provided according to the shape of the slide hole 11, and the slide block is preferably made of a wear-resistant material.

[0039] FIG. 10 and FIG. 11 show a third embodiment of the damper device in the present disclosure. The damper pipe 10 is not provided with an elongated groove-shaped slide hole 11. However, in the third embodiment, the second end 20b of the damper sleeve 20 can be slidably and rotatably connected to the damper pipe 10.

[0040] Specifically, as shown in FIGS. 10 and 11, a connection sleeve 50 slidable along the damper pipe 10 is provided on the damper pipe 10. A boss 54 is provided at the lower part of the connection sleeve 50, and a rotation hole is provided in the boss 54. A pin connection hole 21 is provided at the second end 20b of the damper pipe 20. The pin 40 passes through the pin connection hole 21 and the rotation hole of the boss 54 in sequence, and functions as a pivot point between the damper sleeve 20 and the damper pipe 10. On the other hand, since the connection sleeve 50 and the boss 54 thereon can slide along the damper pipe 10, the pivot point 40, that is, the second end 20b of the damper sleeve 20 can slide relative to the damper pipe 10.

[0041] Furthermore, in order to limit the sliding range of the connection sleeve 50 along the damper pipe 10, a stop projection or a stopper (not shown) may be provided on the damper pipe 10.

[0042] Next, the damper elastic element 30 in the damper device 100 will be described in detail. In order to achieve the damping effect of the damper device 100, the damper elastic element 30 applies a damping force to the damper pipe 10 and / or the damper sleeve 20, and can slow down the downward movement of the bracket structure formed by the damper pipe 10 and the damper sleeve 20.

[0043] In the first, second, and third embodiments of the damper device according to the present disclosure, the damper elastic element 30 is a separate member other than the damper pipe 10 and the damper sleeve 20.

[0044] For example, in the first embodiment of the damper device of the present invention, the damper elastic element 30 may be a torsion spring. As shown in FIG. 8, the first end of the torsion spring 30 is a pressing portion 31 that acts on the damper pipe 10, and the second end is a hook portion 32. The hook portion 32 can be engaged with the engaging hole 25 of the damper sleeve 20. An annular collar 33 wound by the spring wire of the torsion spring 30 is provided between the pressing portion 31 and the hook portion 32 of the torsion spring 30, and the collar 33 may be provided on the connection column 53 of the connection sleeve 50.

[0045] Next, the operation of the damper device according to the present disclosure will be described in detail with reference to the first embodiment.

[0046] When the damper device does not receive the pressure of the seat portion of the stroller, as shown in FIG. 1, the bracket structure formed by the damper pipe 10 and the damper sleeve 20 is held at a high position by the torsion spring 30.

[0047] When the damper device receives the pressure of the seat portion of the stroller, the damper pipe 10 rotates downward around the first pipe 101, rotates the damper sleeve 20 downward around the second pipe 102, and the connection sleeve 50 slides from the position P1 to the position P2 along the damper pipe 10 (see FIG. 4). Therefore, the bracket structure formed by the damper pipe 10 and the damper sleeve 20 moves to a lower position. In this process, the torsion spring 30 applies a damping force to the damper pipe 10 and the damper sleeve 20, thereby significantly relaxing the moving speed and strength of the bracket structure to the lower position and weakening the vibration of the seat portion of the stroller.

[0048] When the pressure received by the damper device decreases or disappears, the bracket structure returns from the lower position to the higher position by the torsion spring 30.

[0049] FIG. 9 shows in detail the state when the damper pipe 10, the damper sleeve 20, the torsion spring 30, and the connection sleeve 50 are assembled in the first embodiment of the damper device according to the present disclosure. The torsion spring 30 imparts a damping force to the connection portion between the damper pipe 10 and the damper sleeve 20.

[0050] The operation of the second embodiment of the damper device according to the present disclosure may be substantially the same as that of the first embodiment, except that the specific arrangement of some components is changed. For example, since the connection sleeve 50 is not provided on the damper pipe 10, the torsion spring 30 can be provided in another way as long as a damping force can be applied to the connection between the damper pipe and the damper sleeve 20.

[0051] Further, the damper elastic element 30 is not limited to a torsion spring, and may be various elastic bodies that can generate a damping force, such as a tension spring, a compression spring, a hydraulic rod, and a pneumatic rod. Also, as shown in FIGS. 10 and 11, the damper elastic element 30 may be a single item that acts only on the damper pipe 10 or the damper sleeve 20, or may be a single item or a plurality of items that act on the damper pipe 10 and the damper sleeve 20 simultaneously, and can generate a damping force in response to the downward rotation of the damper pipe 10 and the damper sleeve 20.

[0052] In the fourth embodiment of the damper device according to the present disclosure, the damper elastic element is not a separate member excluding the damper pipe 10 and the damper sleeve 20. For example, the damper elastic element is a hydraulic rod or a pneumatic rod forming a part of the damper sleeve 20. One end of the hydraulic rod or the pneumatic rod is rotatably connected to the second pipe 102, and the other end is rotatably connected to the damper pipe 10. When the damper pipe 10 is pressed downward and rotates downward around the first pipe 101, the damper sleeve 20 is driven to rotate downward around the second pipe 102, and a damping force is applied to the damper pipe 10 through the hydraulic or pneumatic rod forming a part of the damper sleeve 20. In this case, the damper sleeve 20 has the functions of both a damper sleeve and a damper elastic element, and thus the individual damper elastic element 30 can be omitted. In this embodiment, the cost is reduced by reducing the number of parts of the damper device.

[0053] The baby stroller using the damper device of the present invention can obtain a better damper effect and improve the comfort of the child during travel.

[0054] Without departing from the features of the present disclosure, the features of the present disclosure can be embodied in various forms, and unless otherwise specified, the above embodiments are not limited to the above details and should be broadly construed within the scope defined by the appended claims. Therefore, all modifications and changes included within the scope and limitations of the claims, or equivalents of these scope and limitations, should be covered by the appended claims.

Description of Reference Numerals

[0055] 10 Damper pipe 10a Fixed end 10b Free end 11 Slide hole 20 Damper sleeve 20a First end 20b Second end 21 Pin connection hole 22 Second sleeve hole 23 Limit boss 24 Limit groove 30 Damper elastic element 31 Pressing part 40 Pin, pivot point 50 Connecting sleeve 51 Pin hole 52 Damper sleeve hole 53 Connecting column 54 Boss 100 Sheet pipe 101 First pipe 102 Second pipe 103 Pipe joint

Claims

1. A damper device for a baby stroller, disposed on a first pipe and a second pipe that are parallel to each other in a seat pipe of the baby stroller and carrying a seat portion of the baby stroller, The damper device includes a bracket structure rotatably connected to the first pipe and the second pipe, and the bracket structure is elastically prevented by a damper elastic element from rotating with respect to the first pipe and the second pipe to delay downward movement of the seat portion, The bracket structure includes a damper pipe and a damper sleeve, The damper pipe has a fixed end rotatably connected to the first pipe, The damper sleeve has a first end rotatably connected to the second pipe and a second end slidably connected to the damper pipe A damper device characterized by the above.

2. The damper pipe abuts against the lower surface of the seat portion and has a free end higher than the second pipe, The damper sleeve is arranged to be driven to rotate downward around the second pipe when the damper pipe is pushed downward and rotates downward around the first pipe, The damper elastic element is a separate member from the damper pipe and the damper sleeve, and the damper elastic element is arranged to apply a damping force to the damper pipe and / or the damper sleeve when the damper pipe and the damper sleeve rotate downward The damper device according to claim 1, characterized by the above.

3. A connecting sleeve slidable along the damper pipe is provided on the damper pipe, and the second end of the damper sleeve is rotatably connected to the connecting sleeve so that the second end of the damper sleeve is indirectly rotatably connected to the damper pipe The damper device according to claim 2, characterized by the above.

4. A lateral pin hole is provided in the damper pipe in the damper pipe, a pin connection hole is provided at the second end of the damper sleeve, and an elongated slot-shaped slide hole is provided in a part of the damper pipe surrounded by the connecting sleeve. The pin passes through the pin connection hole, the pin hole and the slide hole in sequence The damper device according to claim 3, characterized in that...

5. The connection sleeve is provided with a damper sleeve hole through which the damper pipe slides, and a lateral connection column is provided on the damper pipe at a position where the pin hole of the connection sleeve is provided. The pin hole penetrates the connection column. A second sleeve hole penetrating the second pipe is provided at the first end of the damper sleeve. Two limit bosses are provided at the second end of the damper sleeve. The pin connection hole is formed by penetrating the two limit bosses. A limit groove is defined between the two limit bosses. The portion of the connection sleeve where the connection column is provided is accommodated in the limit groove. The damper device according to claim 4, characterized in that...

6. The damper elastic element is a torsion spring. The first end of the torsion spring is a pressing portion acting on the damper pipe. The second end of the torsion spring is a hook portion engaging with the engaging hole of the damper sleeve. A ring-shaped collar wound by the spring wire of the torsion spring is provided between the pressing portion and the hook portion. The collar is provided on the connection column of the connection sleeve. The damper device according to claim 5, characterized in that...

7. A boss is provided at the lower part of the connection sleeve, and a rotation hole is provided in the boss. The pin connection hole is provided at the second end of the damper sleeve. The pin sequentially penetrates the pin connection hole and the rotation hole of the boss. The damper device according to claim 3, characterized in that...

8. An elongated slot-shaped slide hole is provided at a portion of the damper pipe rotatably connected to the damper sleeve. The pin connection hole is provided at the second end of the damper sleeve. The pin penetrates the pin connection hole and the slide hole, so that the second end of the damper sleeve is directly rotatably connected to the damper pipe. The damper device according to claim 1, characterized in that...

9. The damper elastic element is a tension spring, a compression spring, a hydraulic rod or a pneumatic rod acting on the damper pipe and / or the damper sleeve to generate a damping force in response to downward rotation of the damper pipe and the damper sleeve. The damper device according to claim 1, characterized in that...

10. The damper pipe abuts against the lower surface of the seat portion and has a free end higher than that of the second pipe. The damper elastic element is a hydraulic rod or a pneumatic rod forming part of the damper sleeve. When the damper pipe is pressed downward and rotated downward around the first pipe, the damper sleeve is driven to rotate downward around the second pipe, and the hydraulic rod or the pneumatic rod forming part of the damper sleeve applies a damping force to the damper pipe. The damper device according to claim 1, characterized in that...

11. Including the damper device according to claim 1 A seat of a baby stroller, characterized in that...

12. A baby stroller including a frame and a seat provided on the frame, The seat includes the damper device according to claim 1 A baby stroller, characterized in that...

13. The sliding hole is provided with an abrasion-resistant coating, Or A sliding block having a sliding groove is provided according to the shape of the sliding hole, and the sliding block is made of an abrasion-resistant material. The damper device according to claim 8, characterized in that...

14. In order to limit the sliding range of the connection sleeve along the damper pipe, a stop projection or a stopper is provided on the damper pipe. The damper device according to claim 3, characterized in that...

15. When the damper device is not under pressure, the bracket structure is held at a high position by the damper elastic member. When the damper device is under pressure, the damper pipe rotates downward around the first pipe and drives the damper sleeve to rotate downward to a lower position around the second pipe. When the pressure on the damper device is attenuated or disappears, the bracket structure moves from a low position to a high position later by the damper elastic member. The damper device according to claim 1, characterized in that...

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