Joint seat assembly for linkage folding baby carriage

Abstract

The utility model discloses a joint seat assembly for linkage folding of a baby carriage, which adopts the technical scheme that the joint seat assembly is arranged on the baby carriage, is connected with a front foot tube group, a rear foot tube group, a handle tube group and a seat group, and comprises an outer joint seat, a middle joint seat and an inner joint seat which are mutually pivoted and connected; wherein the outer joint seat is connected with the handle pipe set, the middle joint seat is connected with the front foot pipe set and the rear foot pipe set, and the inner joint seat is connected with the seat set. The folding mechanism has the advantages of being high in folding process linkage and clear in sequential logic.

Description

Technical Field

[0001] This utility model relates to the field of infant and child product technology, and in particular to a joint seat assembly for a stroller that is used for linkage folding and closing. Background Technology

[0002] Modern stroller folding designs must balance operational efficiency and structural stability, with the core being the coordinated folding of stroller components through mechanical linkages. Traditional folding solutions often employ separate unlocking mechanisms, requiring users to manually operate the locking devices of components such as the seat, handlebars, and support legs one by one, resulting in cumbersome folding steps and insufficient continuity of movement. Although some improved designs attempt to introduce linkages to synchronously drive specific components, these structures are often limited to rigid transmission in a single direction and cannot construct a multi-level linkage timing logic.

[0003] In existing technologies, the lack of coordination in the movement of folding strollers is particularly prominent. The seat and handlebars are often designed as independent folding units, lacking a triggering connection between them. This means that after the seat is folded, the user still needs to operate the handlebar lock separately, severely disrupting the overall folding process. Furthermore, the folding action of the support legs largely relies on a mechanical hard connection with the handlebars. Without intermediate transition components, structural interference is easily caused by conflicting movement trajectories. More importantly, such designs generally lack a causal triggering mechanism between components. The folding action of preceding components cannot automatically guide the directional deformation of subsequent components, requiring manual intervention in the movement sequence of components during folding. This reduces operational efficiency and can easily lead to loosening or jamming of the stroller structure due to timing errors. In summary, existing folding strollers suffer from technical defects such as a fragmented folding process and a lack of timing logic. Utility Model Content

[0004] The main purpose of this invention is to propose a joint seat assembly for a linked folding stroller, which aims to solve the technical defects of existing folding strollers, such as the fragmented folding process and lack of timing logic.

[0005] To achieve the above objectives, this utility model proposes a joint seat assembly for a linked folding stroller, comprising:

[0006] The external joint seat, the middle joint seat, and the internal joint seat are pivotally connected to each other.

[0007] The outer joint seat is used for docking and installation at the lower end of the handle tube assembly.

[0008] The middle joint seat is used to swing and connect to the upper end of the forefoot tube assembly.

[0009] The rear leg tube assembly is used for docking and installation at the rear of the middle joint seat.

[0010] Its features are:

[0011] The middle joint seat is equipped with a movable mechanism for retracting the foreleg tube assembly;

[0012] The movable mechanism includes an arc-shaped guide groove disposed in the middle joint seat, a connecting rod disposed in the arc-shaped guide groove, and a connecting seat pivotally connected to the connecting rod.

[0013] The connecting seat and the upper end of the front foot tube are fixedly connected. The connecting rod is limited to the range of the arc-shaped guide groove for movement. One end of the connecting rod is pivotally connected to the outer joint seat, and the other end is pivotally connected to the connecting seat. The upper end of the connecting seat is pivotally connected to the front of the middle joint seat.

[0014] Furthermore, the middle joint seat is provided with a limiting part for limiting the position of the connecting seat.

[0015] When in the unfolded state, the connecting seat abuts against the limiting part;

[0016] When in the folded state, the connecting seat gradually moves away from the contact position of the limiting part during the folding process.

[0017] Furthermore, the outer joint seat is provided with a guide shaft for traction connecting rod, and the guide shaft is pivotally connected to the upper end of the connecting rod.

[0018] Furthermore, it also includes a locking assembly for locking the outer joint seat, the middle joint seat, and the inner joint seat to rotate relative to each other.

[0019] Furthermore, the locking assembly includes a first locking member for locking the rotation of the outer joint seat, a first receiving chamber is defined between the outer joint seat and the middle joint seat, and the first locking member is disposed in the first receiving chamber.

[0020] Furthermore, a first reset component for resetting the first locking component is also provided in the first accommodating cavity.

[0021] Furthermore, the locking assembly includes a second locking member for locking the rotation of the inner joint seat, a second receiving chamber is defined between the inner joint seat and the middle joint seat, and the second locking member is disposed in the second receiving chamber.

[0022] Furthermore, a second reset component for resetting the second locking component is also provided in the second accommodating cavity.

[0023] Furthermore, the joint seat assembly is fitted with a seat assembly, which is connected to the inner joint seat. At the same time, a release component for releasing the locking component is provided between the inner joint seat and the seat assembly.

[0024] Furthermore, the seat assembly includes a backrest and a seat cushion, and the backrest and seat cushion are connected by a backrest joint seat and a seat cushion joint seat that are pivotally connected to each other. The unlocking assembly includes a drive member, an intermediate member, and an unlocking member. The drive member is located in the backrest joint seat, the intermediate member is located in the seat cushion joint seat, and the unlocking member is located in the inner joint seat. When the seat assembly is folded, the drive member rotates with the backrest and abuts against the intermediate member, and the horizontal movement of the intermediate member drives the unlocking member to push the locking assembly to release the lock.

[0025] This utility model discloses a joint seat assembly for a stroller that allows for coordinated folding and closing. The technical solution of this utility model involves setting a joint seat assembly on the stroller, which is connected to the front leg tube assembly, rear leg tube assembly, handle tube assembly, and seat assembly. The joint seat assembly includes an outer joint seat, a middle joint seat, and an inner joint seat that are pivotally connected to each other. The outer joint seat connects to the handle tube assembly, the middle joint seat connects to the front and rear leg tube assemblies, and the inner joint seat connects to the seat assembly. When the stroller needs to be folded and closed, coordinated folding and closing are achieved through the internally interconnected joint seat assembly and the movable mechanism. This utility model has the beneficial effects of strong coordination in the folding process and clear timing logic. Attached Figure Description

[0026] Figure 1 A 3D structural diagram of a folding stroller;

[0027] Figure 2 3D structural breakdown of the joint assembly, locking assembly, and release assembly. Figure 1 ;

[0028] Figure 3 3D structural breakdown of the joint assembly, locking assembly, and release assembly. Figure 2 ;

[0029] Figure 4 A three-dimensional structural diagram of the central joint seat and the movable mechanism in the direction of the first accommodating chamber;

[0030] Figure 5 A three-dimensional structural diagram of the central joint seat and the movable mechanism in the direction of the second accommodating chamber;

[0031] Figure 6 This is a schematic diagram of the planar structure of the connector;

[0032] Figure 7 A three-dimensional structural diagram of the backrest, backrest joint seat, and drive components;

[0033] Figure 8 A three-dimensional structural diagram of the seat cushion, seat cushion joint seat, and intermediate components. Figure 1 ;

[0034] Figure 9 A three-dimensional structural diagram of the seat cushion, seat cushion joint seat, and intermediate components. Figure 2 ;

[0035] Figure 10 A diagram showing the unfolded state of a folding stroller;

[0036] Figure 11 This is a schematic diagram showing the seat assembly of a folding stroller after it has been folded down.

[0037] Figure 12 This is a diagram showing a folded stroller in a partially folded state.

[0038] Figure 13 This is a diagram showing the folded state of a stroller.

[0039] The above figures include the following reference numerals:

[0040] 1. Front leg tube assembly; 11. Front leg tube; 12. Front roller;

[0041] 2. Rear leg tube assembly; 21. Rear leg tube; 22. Rear roller;

[0042] 3. Hand-held pipe assembly;

[0043] 4. Seat assembly; 41. Backrest; 42. Seat cushion; 43. Backrest joint seat; 44. Seat cushion joint seat; 45. Backrest board; 46. Armrest; 47. Footrest;

[0044] 5. Joint seat assembly; 51. External joint seat; 511. Guide shaft; 52. Middle joint seat; 521. Limiting part; 53. Internal joint seat; 54. First receiving chamber; 55. Second receiving chamber;

[0045] 6. Movable mechanism; 61. Arc-shaped guide groove; 62. Connecting rod; 63. Connecting seat; 631. Rivet groove; 632. Rope end groove;

[0046] 7. Locking assembly; 71. First locking component; 72. First reset component; 73. Second locking component; 74. Second reset component;

[0047] 8. Lock release component; 81. Drive component; 82. Middleware; 83. Unlocking component. Detailed Implementation

[0048] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0049] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0050] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0051] This invention proposes a joint seat assembly for a stroller that can be folded and closed in a coordinated manner.

[0052] In this embodiment of the utility model, such as Figures 1 to 13 As shown, since the articulated seat assembly 5 for the folding stroller is located on the stroller, the following description uses a folding stroller as an example to illustrate the articulated seat assembly 5. The folding stroller includes a front leg tube assembly 1, a rear leg tube assembly 2, a handle tube assembly 3, a seat assembly 4, and the articulated seat assembly 5. The front leg tube assembly 1 includes a front leg tube 11 and a front roller 12, with the front roller 12 located below the front leg tube 11. The rear leg tube assembly 2 includes a rear leg tube 21 and a rear roller 22, with the rear roller 22 located below the rear leg tube 21. The articulated seat assembly 5 includes an outer articulated seat 51, a middle articulated seat 52, and an inner articulated seat 53 that are pivotally connected to each other. The lower end of the handle tube assembly 3 is mounted on the outer articulated seat 51. The upper end of the front leg tube assembly 1 is pivotally connected to the front part of the middle joint seat 52, and the rear leg tube assembly 2 is fixedly installed at the rear part of the middle joint seat 52. The middle joint seat 52 is provided with a movable mechanism 6 for retracting the front leg tube assembly 1. The movable mechanism 6 includes an arc-shaped guide groove 61 provided in the middle joint seat 52, a connecting rod 62 provided in the arc-shaped guide groove 61, and a connecting seat 63 pivotally connected to the connecting rod 62. The connecting seat 63 is fixedly connected to the upper end of the front leg tube 1. The connecting rod 62 is limited to the range of the arc-shaped guide groove 61 for movement. One end of the connecting rod 62 is pivotally connected to the outer joint seat 51, and the other end is pivotally connected to the connecting seat 63. The upper end of the connecting seat 63 is pivotally connected to the front of the middle joint seat 52.

[0053] Specifically, the middle joint seat 52 is provided with a limiting part 521 for limiting the connecting seat 63. When the front leg tube assembly 1 is in the unfolded initial position, the connecting seat 63 abuts against the limiting part 521. When the front leg tube assembly 1 is in the folded state, the connecting seat 63 gradually moves away from the abutting position of the limiting part 521 during the folding process.

[0054] Specifically, the outer joint seat 51 is provided with a guide shaft 511 for traction of the connecting rod 62. The guide shaft 511 is pivotally connected to the upper end of the connecting rod 62. When the outer joint seat 51 rotates, the connecting rod 62 is pulled by the guide shaft 511 and moves within the range of the arc-shaped guide groove 61.

[0055] Understandably, when the handle tube assembly 3 rotates, the outer joint seat 51 rotates, causing the connecting rod 62 to move. The connecting rod 62 moves within the arc-shaped guide groove 61, simultaneously causing the connecting seat 63 to move. The connecting seat 63 disengages from the contact position of the limiting part 521. At this time, the connecting seat 63 has enough space to rotate, so that the connecting seat 63 can rotate to cause the front leg tube assembly 1 to retract toward the rear leg tube assembly 2, thus achieving the purpose of retraction.

[0056] In an embodiment of this utility model, in order to restrict arbitrary rotation inside the joint seat assembly 5, the joint seat assembly 5 is provided with a locking component 7 for locking the outer joint seat 51, the middle joint seat 52 and the inner joint seat 53 to rotate relative to each other.

[0057] Specifically, the locking assembly 7 includes a first locking component 71 for locking the rotation of the outer joint seat 51. A first receiving chamber 54 is defined between the outer joint seat 51 and the middle joint seat 52. The first locking component 71 is disposed in the first receiving chamber 54. The first locking component 71 has a tooth structure and locks itself by abutting against the middle joint seat 52 and the outer joint seat 51 through the tooth-like structure on its surface.

[0058] Furthermore, the first accommodating chamber 54 is also provided with a first reset component 72 for resetting the first locking component 71. The first reset component 72 can push the first locking component 71 back to the locking position. The first locking component 71 is preferably a spring, which abuts between the outer joint seat 51 and the first locking component 71. When the first locking component 71 unlocks the outer joint seat 51, it compresses the spring. The spring releases its elastic potential energy to push the first locking component 71 back, causing the outer joint seat 51 to enter the locked state. In some other embodiments, the first locking component 71 can also be made of rubber, sponge, elastic fiber, etc. This is the prior art and will not be described in detail.

[0059] Specifically, the locking assembly 7 includes a second locking member 73 for locking the rotation of the inner joint seat 53. A second receiving chamber 55 is defined between the inner joint seat 53 and the middle joint seat 52. The second locking member 73 is disposed in the second receiving chamber 55. The second locking member 73 has a tooth structure and locks itself by abutting against the middle joint seat 52 and the inner joint seat 53 through the tooth structure on its surface.

[0060] Furthermore, the second accommodating chamber 55 is also provided with a second reset component 74 for resetting the second locking component 73. The second reset component 74 can push the second locking component 73 back to the locking position. The second locking component 73 is preferably a spring. When the second locking component 73 unlocks the inner joint seat 53, it compresses the spring. The spring releases elastic potential energy to push the second locking component 73 back, causing the inner joint seat 53 to enter the locked state. In some other embodiments, referring to the first locking component 71, the second locking component 73 can also be limited to other components that can store elastic potential energy. This is the prior art and will not be described in detail.

[0061] In an embodiment of this utility model, a release component 8 for releasing the locking component 7 is provided between the seat assembly 4 and the inner joint seat 53. In the prior art, the release component 8 generally uses the handle tube to link the traction rope to unlock the locking part, but this is not conducive to integrating the folding process of the stroller.

[0062] Specifically, to further coordinate the folding process of the stroller and enhance the timing logic, the seat assembly 4 includes a backrest 41 and a seat cushion 42, which are connected by a backrest joint seat 43 and a seat cushion joint seat 44 that are pivotally connected to each other. The unlocking assembly 8 includes a drive member 81, an intermediate member 82, and an unlocking member 83. The drive member 81 is located at the backrest joint seat 43, the intermediate member 82 is located at the seat cushion joint seat 44, and the unlocking member 83 is located at the inner joint seat 53. When the seat assembly 4 is folded, the drive member 81 follows the backrest 41. 1. When the seat 41 is rotated, its inclined surface impacts and abuts against the intermediate member 82, while simultaneously driving the intermediate member 82 to form a horizontal movement to push the unlocking member 83. The unlocking member 83 ultimately acts on the locking component 7 to release the lock. It can be understood that when the backrest 41 is folded, the backrest joint seat 43 rotates, causing the driving member 81 to abut against the intermediate member 82. After being abutted, the intermediate member 82 moves horizontally, and the horizontally moving intermediate member 82 then abuts against the unlocking member 83. Subsequently, the unlocking member 83 pushes the locking component 7 to realize the unlocking function. By rotating the seat assembly 4, the joint seat assembly 5 can be unlocked, thereby enabling the folding of other structures.

[0063] In this embodiment of the utility model, the backrest 41 is further provided with a backrest 45 for increasing comfort in the direction of use, and the seat cushion 42 is further provided with an armrest 46 for mounting a plate and preventing the baby from falling, and a footrest 47 for supporting and placing the legs. In addition, the backrest 41 is also provided with a canopy 48 for mounting a sunshade component. The backrest 45, armrest 46 and footrest 47 are all fixedly connected, and the canopy 48 is hinged to the backrest 41. In fact, in order to further improve the folding property, the armrest 46 and footrest 47 can be set to be movably connected. However, in order to prevent the armrest 46 and footrest 47 from cutting and causing injury to the infant when folding, it is preferred to be fixedly connected. It can be understood that the backrest 45, armrest 46, footrest 47 and canopy 48 move with the backrest 41 or seat cushion 42 during the rotation of the backrest 41 or seat cushion 42 to complete the folding step.

[0064] In an embodiment of this utility model, in order to prevent the folding stroller from moving abnormally after being folded, a directional component (not shown) is provided in the front leg tube assembly 1 to prevent the folding stroller from sliding abnormally after being folded. Existing strollers usually install a directional component in the front leg tube assembly 1 to restrict the movement of the caster wheels, which is the prior art and will not be described in detail.

[0065] Specifically, the connecting seat 63 includes a rivet groove 631 and a rope end groove 632. The rivet groove 631 and the rope end groove 632 are used to install rivets and traction ropes, respectively. One end of the traction rope extends into the rope end groove 632, and the other end is connected to the directional component. When the stroller is unfolded, the rivet presses down on the traction rope, thereby changing the stroke of the traction rope and unlocking the directional component.

[0066] The following content serves as an explanation of the working principle of this utility model:

[0067] Please refer to Figures 10 to 13 The content shown, Figure 10 This is the normal operating state when the present invention is unfolded. Then, during the folding process, the seat assembly 4 is first folded down, as follows: Figure 11 The image shows the seat assembly 4 in its folded state. After the seat assembly 4 is folded, the joint seat assembly 5 is unlocked by the release component 8. At this time, the front leg tube assembly 1 can be retracted towards the rear leg tube assembly 2 by the action of the moving mechanism 6, while the handlebar assembly 3 retracts towards the rear leg tube assembly 2 by gravity or user pushing. Please refer to the image for details on how the retraction occurs. Figure 12 The half-folded state shown is followed by the final folded state as follows. Figure 13 As shown.

[0068] It is also worth noting that the handlebar assembly 3 itself can be set to a telescopic state according to existing technology. Since this part is a retraction step independent of the aforementioned timing logic, it is explained separately. In actual retraction, the handlebar assembly 3 can be retracted first and then the seat assembly 4 can be retracted. As for how the handlebar assembly 3 extends and retracts, this part is existing technology and will not be elaborated.

[0069] Finally, as a preferred embodiment of this utility model, the timing logic of the folding stroller is summarized as follows: first, the handle tube assembly 3 is extended and retracted, then the seat assembly 4 is rotated. After the seat assembly 4 is rotated, the joint seat assembly 5 is released. At this time, due to the release of the joint seat assembly 5, the movable handle tube assembly 3 and the front leg tube assembly 1 move towards the rear leg tube assembly 2 and retract until the predetermined folding position is reached, and the stroller is folded up.

[0070] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A joint base assembly for a linkage folding stroller, installed on a stroller having a handle tube set, a front leg tube set and a rear leg tube set, comprising: an outer joint base, a middle joint base and an inner joint base pivotally connected to each other, wherein, the outer joint base is used for abuttingly mounting on a lower end of the handle tube set, the middle joint base is used for swingably connecting an upper end of the front leg tube set, the rear leg tube set is used for abuttingly mounting on a rear portion of the middle joint base, characterized in that: the middle joint base is provided with a moving mechanism for folding the front leg tube set; the moving mechanism comprises an arc-shaped guide slot provided on the middle joint base, a connecting rod provided in the arc-shaped guide slot and a coupling base pivotally connected to the connecting rod, the coupling base is fixedly connected to the upper end of the front leg tube set, the connecting rod moves within the range of the arc-shaped guide slot, one end of the connecting rod is pivotally connected to the outer joint base and the other end is pivotally connected to the coupling base, and the upper end of the coupling base is pivotally connected to the front portion of the middle joint base.

2. The trunnion assembly of claim 1, wherein: the middle joint base is provided with a limiting portion for limiting the coupling base, when in an unfolded state, the coupling base abuts against the limiting portion; when in a folded state, the coupling base gradually moves away from the abutting position of the limiting portion during folding.

3. The trunnion assembly of claim 1 wherein: the outer joint base is provided with a guide shaft for pulling the connecting rod, and the guide shaft is pivotally connected to the upper end of the connecting rod.

4. The trunnion assembly of claim 1 wherein: a locking assembly for locking the rotation of the outer joint base, the middle joint base and the inner joint base relative to each other is further included.

5. The joint socket assembly of claim 4, wherein: the locking assembly comprises a first locking component for locking the rotation of the outer joint base, a first accommodating chamber is defined between the outer joint base and the middle joint base, and the first locking component is arranged in the first accommodating chamber.

6. The joint block assembly of claim 5, wherein: a first reset component for resetting the first locking component is further arranged in the first accommodating chamber.

7. The trunnion assembly of claim 4 wherein: the locking assembly comprises a second locking component for locking the rotation of the inner joint base, a second accommodating chamber is defined between the inner joint base and the middle joint base, and the second locking component is arranged in the second accommodating chamber.

8. The trunnion assembly of claim 7, wherein: a second reset component for resetting the second locking component is further arranged in the second accommodating chamber.

9. A trunnion assembly as claimed in any one of claims 4 to 8, wherein: a seat set is further arranged in cooperation with the joint base assembly, the seat set is connected to the inner joint base, and a release assembly for releasing the locking assembly is arranged between the inner joint base and the seat set.

10. The trunnion assembly of claim 9, wherein: the seat set comprises a backrest and a seat cushion, and the backrest and the seat cushion are connected through a backrest joint base and a seat cushion joint base which are pivotally connected to each other, the release assembly comprises a driving member, an intermediate member and an unlocking member, wherein the driving member is arranged on the backrest joint base, the intermediate member is arranged on the seat cushion joint base, and the unlocking member is arranged on the inner joint base, when the seat set is folded, the driving member rotates to abut against the intermediate member, and the horizontal movement of the intermediate member drives the unlocking member to push the locking assembly to be released.

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