Seat assembly and stroller

Abstract

The application discloses a seat assembly and a baby carriage, and relates to the technical field of children's products. The seat assembly comprises a fixed seat, a seat plate, a backrest frame and a linkage mechanism. The seat plate is slidingly matched with the fixed seat. The backrest frame is rotatably connected with the fixed seat. The linkage mechanism is connected with the backrest frame and the seat plate. When the backrest frame in the unfolded state is rotated to be folded to the fixed seat, the linkage mechanism drives the seat plate to slide and retract to the fixed seat under the drive of the backrest frame. According to the scheme, the rotary motion of the backrest frame is converted into the sliding motion of the seat plate through the linkage mechanism. Thus, when the backrest frame is rotated to be folded to the fixed seat in the process of folding and storing the seat assembly, the seat plate can be synchronously driven to slide and retract to the fixed seat. That is, the whole folding and storing process only needs to operate the backrest frame and does not need to separately push and pull the seat plate. Therefore, the folding operation steps are simplified, and the folding efficiency of the seat assembly is improved.

Description

Technical Field

[0001] This application relates to the field of children's products technology, and in particular to a seat assembly and a stroller. Background Technology

[0002] The seat in a stroller is usually removable to allow for the replacement of different seat accessories. The seat itself also needs to be foldable for easy storage and transport.

[0003] However, in the existing chairs, the folding actions of each movable part are independent during the folding process, and the user needs to operate each part step by step, which makes the folding process relatively cumbersome and the overall folding efficiency relatively low. Summary of the Invention

[0004] The main objective of this application is to propose a seat assembly that addresses the technical problems of cumbersome and inefficient folding operations in existing seats.

[0005] To achieve the above objectives, the seat assembly proposed in this application includes: Fixed base; The base plate is slidably fitted onto the fixed base; The backrest frame is rotatably connected to the fixed base; A linkage mechanism, which is connected to the backrest frame and the seat plate; When the backrest frame rotates and retracts towards the fixed seat in the unfolded state, the linkage mechanism drives the seat plate to slide and retract towards the fixed seat under the drive of the backrest frame.

[0006] In one embodiment, the backrest frame has a transmission part; when the backrest frame rotates and retracts toward the fixed seat, the transmission part generates a displacement in a preset direction, the preset direction being the direction in which the seat plate slides back toward the fixed seat; The linkage mechanism includes a first link; the first end of the first link is rotatably connected to the transmission part, and the second end of the first link is rotatably connected to the seat plate; the first link pulls the seat plate towards the fixed seat and retracts under the drive of the backrest frame.

[0007] In one embodiment, the fixed base is provided with a guide structure, and the base plate is provided with a mating structure; the guide structure and the mating structure are slidably engaged. One of the guiding structure and the mating structure is a guide slider, and the other of the guiding structure and the mating structure is a guide groove.

[0008] In one embodiment, the guide structure is provided with a roller, which rolls and engages with the engagement structure.

[0009] In one embodiment, the seat assembly further includes a first locking mechanism movably connected to the backrest frame; The first locking mechanism is connected to the fixed seat in the locked state to prevent the backrest frame from rotating relative to the fixed seat; and the first locking mechanism is separated from the fixed seat in the unlocked state.

[0010] In one embodiment, the fixed base is provided with a first limiting groove; the first locking mechanism includes a first locking pin and a first elastic member, the first elastic member being connected to the backrest frame and the first locking pin; the first locking pin is engaged in the first limiting groove under the elastic action of the first elastic member.

[0011] In one embodiment, the first locking mechanism further includes a first operating member and a traction cable; the first operating member is rotatably connected to the backrest frame; the traction cable is embedded inside the backrest frame, a first end of the traction cable is connected to the first operating member, and a second end of the traction cable is connected to the first locking pin. During the process of rotating the first operating member to the unlocked state, the first operating member pulls the first locking pin and the first limiting groove through the traction cable.

[0012] In one embodiment, the seat assembly further includes an armrest frame and a second locking mechanism; the armrest frame is rotatably connected to the fixed seat; the second locking mechanism is connected to the backrest frame; in the locked state, the second locking mechanism blocks the rotation path of the armrest frame to prevent the armrest frame from rotating and retracting toward the fixed seat; When the backrest frame in the unfolded state rotates and retracts towards the fixed seat, the second locking mechanism leaves the rotation path of the armrest frame under the drive of the backrest frame.

[0013] In one embodiment, the second locking mechanism includes a second locking pin and a second elastic member, the second elastic member being connected to the fixed base and the second locking pin; the second locking pin abuts against the handrail frame under the elastic action of the second elastic member to prevent the handrail frame from rotating and retracting toward the fixed base; The backrest frame has a disc-shaped cam structure, with the rotation axis of the backrest frame as the rotation center; the working contour surface of the disc-shaped cam structure retracts with the rotation of the backrest frame and slides relative to the second locking pin, thereby causing the second locking pin to separate from the armrest frame.

[0014] In one embodiment, the handrail has a second limiting groove; the first end of the second locking pin has a fastening part, which is fastened into the second limiting groove under the elastic action of the second elastic member; During the rotation and retraction of the backrest frame, the working contour surface of the disc cam structure abuts against the second end of the second locking pin, thereby driving the fastening part to be pulled out of the second limiting groove.

[0015] In one embodiment, the second locking pin is provided with a guide groove; the handrail is rotatably connected to the fixed base via a pivot, and the pivot is slidably engaged in the guide groove.

[0016] In one embodiment, the seat assembly further includes a connector and a third locking mechanism; the connector is rotatably connected to the fixed seat, and the third locking mechanism is connected to the backrest frame; the third locking mechanism, in a locked state, engages with the connector and the fixed seat to prevent the connector from rotating relative to the fixed seat; When the backrest frame in the unfolded state rotates and retracts towards the fixed seat, the third locking mechanism separates from the fixed seat under the drive of the backrest frame.

[0017] In one embodiment, the backrest frame and the connector are rotatably connected to both sides of the fixed base around a third axis; the connector is provided with a first limiting cavity, and the fixed base is provided with a second limiting cavity, the first limiting cavity and the second limiting cavity being disposed opposite to each other; the third locking mechanism includes a locking disc, the two sides of the locking disc being respectively engaged in the first limiting cavity and the second limiting cavity; The backrest frame has an end face cam structure on the side facing the fixed seat. The end face cam structure takes the rotation axis of the backrest frame as its rotation center. The working contour surface of the end face cam structure retracts as the backrest frame rotates, pushing the locking disc to move axially in the direction close to the first limiting cavity, so that the locking disc disengages from the second limiting cavity.

[0018] In one embodiment, the first limiting cavity has at least two first sub-cavities arranged at intervals around the third axis, and the second limiting cavity has at least two second sub-cavities arranged at intervals around the third axis. The locking disc has locking teeth for engaging in at least one first sub-cavity and for engaging in at least one second sub-cavity.

[0019] In one embodiment, the third locking mechanism further includes a third elastic element, which is connected to the plug and the locking disc; the locking disc moves axially in the direction close to the second limiting cavity under the elastic action of the third elastic element.

[0020] This application also proposes a stroller including a frame and a seat assembly as described above; the seat assembly is detachably connected to the frame.

[0021] In one embodiment, the vehicle frame is provided with a plug slot; the seat assembly includes a plug member connected to the mounting base, and the plug member is detachably plugged into the plug slot.

[0022] In one embodiment, a first latching portion protrudes from the insertion slot; the insertion member includes a base, a second operating member, and a fourth elastic member; the base is connected to the fixed base; the second operating member is movably connected to the base, and the second operating member has a second latching portion, which is detachably inserted into the insertion slot; the fourth elastic member is connected to the base and the second operating member. When the second operating member is in the locked position relative to the base, the second latching part is engaged with the first latching part, and the first latching part is used to prevent the second latching part from being pulled out of the insertion slot; when the second operating member is in the unlocked position relative to the base, the second latching part is separated from the first latching part; the elastic force provided by the fourth elastic member is used to keep the second operating member in the locked position.

[0023] In one embodiment, the second operating member is provided with a third limiting groove; the stroller also includes a fifth elastic member and a stop buckle, the fifth elastic member being connected to the frame and the stop buckle; When the second operating member is in the locked position, the stop buckle abuts against the surface of the second operating member under the elastic action of the fifth elastic member; when the second operating member is in the unlocked position, the third limiting groove is opposite to the stop buckle, and the stop buckle is inserted into the third limiting groove under the elastic action of the fifth elastic member to prevent the second operating member from resetting to the locked position.

[0024] The seat assembly proposed in this application converts the rotational motion of the backrest frame into the sliding motion of the seat board through a linkage mechanism. Thus, during the folding and storage of the seat assembly, when the backrest frame rotates and retracts towards the fixed seat, the seat board can be simultaneously slid and retracted towards the fixed seat. In other words, the entire folding and storage process only requires operating the backrest frame without pushing or pulling the seat board separately, thereby simplifying the folding operation steps and improving the folding efficiency of the seat assembly. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 A first-view structural schematic diagram of the seat assembly provided in this application in its fully deployed state; Figure 2 A second-view structural diagram of the seat assembly provided in this application in its fully extended state; Figure 3 A third-view structural diagram of the seat assembly provided in this application in its fully deployed state; Figure 4 A first-view structural schematic diagram of the seat assembly provided in this application during the folding process in one embodiment; Figure 5 A second-view structural schematic diagram of the seat assembly provided in this application during the folding process in one embodiment; Figure 6 A third-view structural diagram of the seat assembly provided in this application during the folding process in one embodiment; Figure 7 A first-view structural diagram of the seat assembly provided in this application in a fully retracted state; Figure 8 A second-view structural diagram of the seat assembly provided in this application in a fully retracted state; Figure 9 A third-view structural diagram of the seat assembly provided in this application in a fully retracted state; Figure 10 A schematic diagram of the overall structure of the seat assembly provided in this application after the connector is folded up; Figure 11 A schematic diagram of the connection structure of the linkage mechanism in one embodiment of the seat assembly provided in this application; Figure 12 An exploded view of the fixed seat and seat plate in one embodiment of the seat assembly provided in this application; Figure 13 A schematic diagram of the connection structure of the first locking mechanism in one embodiment of the seat assembly provided in this application; Figure 14A schematic diagram of the connection structure when the second locking mechanism is in the locked state in one embodiment of the seat assembly provided in this application; Figure 15 A schematic diagram of the connection structure when the second locking mechanism is in the unlocked state in one embodiment of the seat assembly provided in this application; Figure 16 An exploded view of the fixing seat and the connector in one embodiment of the seat assembly provided in this application; Figure 17 A cross-sectional structural schematic diagram of the third locking mechanism in the locked state in one embodiment of the seat assembly provided in this application; Figure 18 A cross-sectional structural schematic diagram of the third locking mechanism in the unlocked state in one embodiment of the seat assembly provided in this application; Figure 19 This is an exploded view of an embodiment of the children's stroller provided in this application; Figure 20 A cross-sectional structural schematic diagram of the connector and the frame in a locked state in one embodiment of the children's vehicle provided in this application; Figure 21 A first cross-sectional structural diagram of the connector and the frame in an embodiment of the children's stroller provided in this application when the connector and the frame are in an unlocked state; Figure 22 This is a second cross-sectional structural diagram of a children's stroller provided in this application when the connector and the frame are in an unlocked state.

[0027] Explanation of icon numbers: X1, First axis; X2, Second axis; X3, Third axis; 1000, Seat components; 1. Fixed base; 101. Guide structure; 102. First limiting groove; 103. Second limiting cavity; 1011, Roller; 1031, Second Sub-cavity; 2. Seat plate; 201. Fitting structure; 3. Backrest frame; 301. Transmission unit; 302. Disc cam structure; 303. End face cam structure; 4. Linkage mechanism; 401. First link; 5. First locking mechanism; 501. First locking pin; 502. First elastic element; 503. First operating element; 504. Traction cable; 6. Handrails; 601. Second limiting groove; 7. Second locking mechanism; 701. Second locking pin; 702. Second elastic element; 7011. Fastening part; 7012. Guide groove; 8. Pivot; 9. Connectors; 901. Seat; 902. Second operating element; 903. Fourth elastic element; 9011, First limiting cavity; 9021, Second latching part; 9022, Third limiting groove; 10. Third locking mechanism; 1001. Locking disc; 1002. Third elastic element; 10011, Locking teeth; 11. Frame; 1101. Plug-in slot; 11011, First buckle part; 12. Fifth elastic element; 13. Stop buckle.

[0028] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the embodiments of this application 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 application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these 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, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, 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, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0032] The seats in the vehicle are usually removable to allow for the replacement of different seat accessories. The seats themselves also need to be foldable for easy storage and transport.

[0033] However, in the existing chairs, the folding actions of each movable part are independent during the folding process, and the user needs to operate each part step by step, which makes the folding process relatively cumbersome and the overall folding efficiency relatively low.

[0034] To address the aforementioned issues, this application provides a corresponding seat assembly. Please refer to [link / reference]. Figure 11 and supplementary reference Figures 1 to 9 The seat assembly 1000 includes: Fixed base 1; Seat plate 2 is slidably fitted onto fixed seat 1; The backrest frame 3 is rotatably connected to the fixed base 1; Linkage mechanism 4 is connected to backrest frame 3 and seat plate 2; When the backrest frame 3 in the unfolded state rotates and retracts towards the fixed seat 1, the linkage mechanism 4, driven by the backrest frame 3, causes the seat plate 2 to slide and retract towards the fixed seat 1.

[0035] In this embodiment, the fixed base 1 serves as a support base for connecting to an external structure, such as the frame of a stroller. The seat plate 2 is slidably fitted onto the fixed base 1, meaning the seat plate 2 can reciprocate linearly relative to the fixed base 1 in the front-to-back direction. The seat plate 2 has an extended position and a retracted position relative to the fixed base 1. The backrest frame 3 is rotatably connected to the rear side of the fixed base 1, and the backrest frame 3 can rotate relative to the fixed base 1 between an extended state and a retracted state under the action of an external force.

[0036] The linkage mechanism 4 is used to convert the rotational motion of the backrest frame 3 into the sliding motion of the seat plate 2. Specifically, the linkage mechanism 4 may include mechanical transmission structures and combinations thereof that can convert one form of motion into another, such as linkage mechanisms, crank-rocker mechanisms, crank-slider mechanisms, and cam mechanisms. The linkage mechanism 4 may be directly connected to the backrest frame 3 and the seat plate 2, or it may be indirectly connected to the backrest frame 3 and the seat plate 2 through other connecting components or transmission components, which is not limited here.

[0037] Based on the above structural configuration, when the seat assembly 1000 is in the unfolded state, as follows: Figures 1 to 3 As shown, the backrest frame 3 and the fixed seat 1 form a certain angle, and the seat plate 2 is in an extended position relative to the fixed seat 1 for seating. When the seat assembly 1000 needs to be folded and stored, the user can rotate the backrest frame 3 downwards, causing the backrest frame 3 to fold towards the fixed seat 1; during this rotation, as... Figures 4 to 6 As shown, the angle change of the backrest frame 3 relative to the fixed seat 1 will generate a driving force on the seat plate 2 pointing towards the fixed seat 1 through the linkage mechanism 4, thereby causing the seat plate 2 to slide and retract towards the fixed seat 1. Figures 7 to 9 As shown, when the backrest frame 3 rotates to the fully folded state relative to the fixed seat 1, the seat plate 2 also slides to the retracted position synchronously relative to the fixed seat 1. This reduces the overall size of the seat assembly 1000 in the folded state, making it easier to store the seat assembly 1000.

[0038] Therefore, the seat assembly 1000 provided in this embodiment converts the rotational motion of the backrest frame 3 into the sliding motion of the seat plate 2 through the linkage mechanism 4. Thus, during the folding and storage of the seat assembly 1000, when the backrest frame 3 rotates and retracts toward the fixed seat 1, the seat plate 2 can be simultaneously driven to slide and retract toward the fixed seat 1. That is, the entire folding and storage process only requires operating the backrest frame 3 without pushing or pulling the seat plate 2 separately, thereby simplifying the folding operation steps and improving the folding efficiency of the seat assembly 1000.

[0039] In one embodiment, refer to Figure 11 The backrest frame 3 has a transmission part 301; when the backrest frame 3 rotates and retracts toward the fixed seat 1, the transmission part 301 generates a displacement in a preset direction, which is the direction in which the seat plate 2 slides and retracts toward the fixed seat 1. The linkage mechanism 4 includes a first link 401; the first end of the first link 401 is rotatably connected to the transmission part 301, and the second end of the first link 401 is rotatably connected to the seat plate 2; the first link 401 pulls the seat plate 2 towards the fixed seat 1 and retracts under the drive of the backrest frame 3.

[0040] In this embodiment, the transmission part 301 can refer to an integrally formed protrusion, lug, or arm structure on the backrest frame 3, or it can refer to a pin, bracket, etc., additionally fixed to the backrest frame 3. When the backrest frame 3 rotates and retracts towards the fixed seat 1, the transmission part 301 rotates together with the backrest frame 3, and the rotation path of the transmission part 301 has a component in the sliding retraction direction of the seat plate 2; thus, the movement of the transmission part 301 along the sliding retraction direction can be transmitted to the seat plate 2 through the first connecting rod 401, thereby driving the seat plate 2 to slide and retract towards the fixed seat 1.

[0041] In a specific example, such as Figure 11 As shown, the transmission part 301 is a connecting ear that protrudes radially; when the seat assembly 1000 is in the unfolded state, the transmission part 301 is located below the rotation axis of the backrest frame 3. The rear end of the first connecting rod 401 is hinged to the transmission part 301 around the first axis X1, and the front end of the first connecting rod 401 is hinged to the seat plate 2 around the second axis X2, and the first axis X1 is parallel to the second axis X2. Based on the above configuration, when the backrest frame 3 rotates and retracts towards the fixed seat 1, as... Figures 4 to 6 As shown, the backrest frame 3 rotates counterclockwise downwards around its axis of rotation. This causes the transmission part 301 to rotate counterclockwise backwards, moving it away from the fixed seat 1. During this backward rotation, the transmission part 301 drives the first connecting rod 401 to move backwards synchronously. This allows the first connecting rod 401 to pull the seat plate 2 backwards relative to the fixed seat 1, causing the seat plate 2 to slide and retract backwards. Figures 7 to 9 As shown, when the backrest frame 3 is fully retracted, the seat plate 2 also slides backward and retracts into the fixed seat 1 under the action of the first connecting rod 401.

[0042] This embodiment utilizes the rotatability between the two ends of the first connecting rod 401 and the backrest frame 3 and the seat plate 2 to adaptively convert the rotational motion of the backrest frame 3 into the sliding motion of the seat plate 2 without causing motion jamming. This achieves the linkage between the backrest frame 3 and the seat plate 2 with fewer parts, simplifying the overall structure of the seat assembly 1000.

[0043] In one embodiment, refer to Figure 12 The fixed base 1 is provided with a guide structure 101, and the base plate 2 is provided with a mating structure 201; the guide structure 101 and the mating structure 201 are in sliding fit. One of the guide structure 101 and the mating structure 201 is a guide slider, and the other of the guide structure 101 and the mating structure 201 is a guide groove.

[0044] In this embodiment, a sliding fit is formed between the guide structure 101 and the mating structure 201, allowing the seat plate 2 to move stably in a linear direction relative to the fixed seat 1. One of the guide structure 101 and the mating structure 201 is a guide slider, and the other is a guide groove; the guide slider and the guide groove are shaped to match each other, and the guide slider can be embedded in the guide groove and slide along the extending direction of the guide groove. Specifically, a guide groove extending in the front-rear direction can be provided on the fixed seat 1, and a guide slider that slides in fit with the guide groove can be provided on the seat plate 2; alternatively, as shown... Figure 12 As shown, a guide groove extending in the front-to-back direction is provided on the base plate 2, and a guide slider that slides in cooperation with the guide groove is provided on the fixed base 1. This is not limited here.

[0045] The guide groove can be configured as a rectangular groove, dovetail groove, T-shaped groove, or other structural forms, and the guide slider has a profile that matches the cross-sectional shape of the guide groove. By limiting the guide slider through the guide groove, problems such as left-right swaying or up-down tilting of the seat plate 2 during sliding can be prevented, thereby improving the stability of the movement of the seat plate 2 relative to the fixed seat 1. At the same time, it can ensure that the motion transmitted by the linkage mechanism 4 can be accurately converted into the sliding retraction of the seat plate 2 along the linear direction.

[0046] In one embodiment, refer to Figure 12 The guide structure 101 is provided with a roller 1011, which is rolled and engaged with the mating structure 201.

[0047] by Figure 12 As shown in the example, when the guide structure 101 is a guide slider, the roller 1011 can be installed on the upper side wall of the guide slider, and a certain space is reserved for the roller 1011 at the top of the guide groove of the seat plate 2. When the guide slider slides in the guide groove, the roller 1011 can roll relative to the top wall of the guide groove. In this way, the sliding friction can be converted into rolling friction through the roller 1011, thereby reducing the sliding resistance of the seat plate 2, improving the relative smoothness of movement between the seat plate 2 and the fixed seat 1, and reducing the wear of the sliding mating surface.

[0048] When the guide structure 101 is a guide groove and the mating structure 201 is a guide slider, the roller 1011 can also be set based on the above principle, which will not be elaborated here.

[0049] In one embodiment, refer to Figure 13 The seat assembly 1000 also includes a first locking mechanism 5, which is movably connected to the backrest frame 3; The first locking mechanism 5 is connected to the fixed seat 1 in the locked state to prevent the backrest frame 3 from rotating relative to the fixed seat 1; and the first locking mechanism 5 is separated from the fixed seat 1 in the unlocked state.

[0050] In this embodiment, when the seat assembly 1000 is in the unfolded state, the first locking mechanism 5 can be set to the locked state, such as... Figure 13 As shown, at this time, the first locking mechanism 5 is simultaneously connected to the backrest frame 3 and the fixed seat 1. This connection prevents the backrest frame 3 from rotating relative to the fixed seat 1, thereby keeping the backrest frame 3 stably in the unfolded state and improving safety. When the seat assembly 1000 needs to be folded and stored, the first locking mechanism 5 can be manually switched to the unlocked state to disconnect the connection between the first locking mechanism 5 and the fixed seat 1, allowing the backrest frame 3 to rotate freely relative to the fixed seat 1 and thus fold up.

[0051] The first locking mechanism 5 can be in the form of pin hole fit, snap fit, thread fit, ratchet mechanism fit, etc., as long as it can be connected and disconnected between the first locking mechanism 5 and the fixed seat 1 according to actual needs, and there is no limitation here.

[0052] In one embodiment, refer to Figure 13 The fixed base 1 is provided with a first limiting groove 102; the first locking mechanism 5 includes a first locking pin 501 and a first elastic element 502. The first elastic element 502 is connected to the backrest frame 3 and the first locking pin 501; the first locking pin 501 is engaged in the first limiting groove 102 under the elastic action of the first elastic element 502.

[0053] Specifically, the first elastic element 502 can be a compression spring, tension spring, torsion spring, elastic colloid, etc.; the elastic force of the first elastic element 502 acting on the first locking pin 501 can drive one end of the first locking pin 501 to move toward the first limiting groove 102. In the locked state, such as Figure 13 As shown, the first locking pin 501 is inserted into the first limiting groove 102 under the elastic action of the first elastic member 502. At this time, the outer wall of the first locking pin 501 and the groove wall of the first limiting groove 102 form a snap-fit, which can prevent the backrest frame 3 from rotating relative to the fixed seat 1. When it is necessary to unlock, an external force can be applied to overcome the elastic force of the first elastic member 502 and pull the first locking pin 501 out of the first limiting groove 102, thereby releasing the lock and allowing the backrest frame 3 to rotate freely relative to the fixed seat 1 to achieve folding.

[0054] This embodiment utilizes the elasticity of the first elastic element 502 to automatically keep the locking pin in the latching position when no external force is applied, thereby improving the locking reliability and stability between the backrest frame 3 and the fixed base 1.

[0055] In one embodiment, refer to Figure 13The first locking mechanism 5 also includes a first operating member 503 and a traction cable 504; the first operating member 503 is rotatably connected to the backrest frame 3; the traction cable 504 is embedded in the backrest frame 3, the first end of the traction cable 504 is connected to the first operating member 503, and the second end of the traction cable 504 is connected to the first locking pin 501. During the process of rotating the first operating member 503 to the unlocked state, the first operating member 503 pulls the first locking pin 501 and the first limiting groove 102 through the traction cable 504.

[0056] Specifically, the first operating component 503 can be set on the crossbeam part at the upper end of the backrest frame 3 for the user to hold, and the first operating component 503 can be set as a throttle, brake lever, finger lever or other device that is easy to rotate and control by hand.

[0057] The backrest frame 3 can be made of hollow rods, and the traction cable 504 is set in the inner cavity of the backrest frame 3. The traction cable 504 is flexible and can be laid along the curved channel inside the backrest frame 3. The upper end of the traction cable 504 is connected to the first operating member 503, and the lower end of the traction cable 504 is connected to the first locking pin 501.

[0058] Based on the above settings, when the user rotates the first operating member 503 to the unlocked state, the first operating member 503 pulls the first locking pin 501 through the traction cable 504, causing the first locking pin 501 to overcome the elastic force of the first elastic member 502 and disengage from the first limiting groove 102, thereby releasing the lock between the first locking pin 501 and the fixed base 1; when the user releases the first operating member 503, the first elastic member 502 can drive the first locking pin 501 to reset.

[0059] This embodiment, by incorporating a flexible traction cable 504 within the backrest frame 3, can adapt to the complex layout of the internal channels of the backrest frame 3, fully utilizing the internal space of the backrest frame 3 while maintaining the simplicity of its external structure. Through the transmission action of the traction cable 504, the user can remotely control the first locking pin 501 by rotating the first operating component 503, thus enabling convenient unlocking without directly touching the first locking pin 501, improving operational convenience.

[0060] In one embodiment, refer to Figure 14 and Figure 15 The seat assembly 1000 also includes an armrest frame 6 and a second locking mechanism 7; the armrest frame 6 is rotatably connected to the fixed seat 1; the second locking mechanism 7 is connected to the backrest frame 3; in the locked state, the second locking mechanism 7 blocks the rotation path of the armrest frame 6 to prevent the armrest frame 6 from rotating and retracting toward the fixed seat 1. When the backrest frame 3 in the unfolded state rotates and retracts towards the fixed seat 1, the second locking mechanism 7 leaves the rotation path of the armrest frame 6 under the drive of the backrest frame 3.

[0061] Specifically, the armrest frame 6 can be configured as a U-shaped frame structure, with both ends of the armrest frame 6 rotatably connected to the left and right sides of the fixed base 1, respectively. The armrest frame 6 is used to provide support for the passenger on the seat 2 to maintain the passenger's balance. The armrest frame 6 has an unfolded position and a folded position relative to the fixed base 1; when the armrest frame 6 is in the unfolded position, such as... Figures 1 to 3 As shown, the handrail frame 6 has a certain angle of inclination relative to the fixed base 1; when the handrail frame 6 is in the folded position, as... Figures 7 to 9 As shown, the handrail 6 rotates downwards and retracts to a position basically flush with the fixed base 1.

[0062] The second locking mechanism 7 can be connected to the backrest frame 3 by direct or indirect connection; the second locking mechanism 7 can move continuously with the rotation and retraction action of the backrest frame 3, and the second locking mechanism 7 can also be driven by contacting the preset part of the backrest frame 3 when the backrest frame 3 rotates to the preset position.

[0063] The second locking mechanism 7 has a locked state and an unlocked state. In the locked state, such as... Figure 14 As shown, a portion of the second locking mechanism 7 is located on the movement path of the handrail 6 as it rotates from the unfolded position to the folded position. If an attempt is made to directly drive the handrail 6 to rotate and retract towards the fixed base 1, the second locking mechanism 7 will contact the handrail 6 and prevent it from continuing to rotate and retract, thus keeping the handrail 6 in its current unfolded position. In the unlocked state, as... Figure 15 As shown, the corresponding part of the second locking mechanism 7 will be removed from the above-mentioned movement path of the handrail 6. At this time, the handrail 6 will no longer be obstructed and can rotate freely relative to the fixed seat 1 to retract.

[0064] The second locking mechanism 7 can take the form of a pin, locking block, buckle, pawl, stop, etc. The second locking mechanism 7 can cooperate with the handrail frame 6 through abutment, insertion, or snap-fit. It only needs to ensure that the second locking mechanism 7 can prevent the handrail frame 6 from rotating in the folding direction when locked, and can release its obstruction of the handrail frame 6 under the drive of the backrest frame 3. This embodiment does not limit the specific structural form of the second locking mechanism 7.

[0065] Based on the above settings, during the process of the backrest frame 3 rotating and retracting towards the fixed base 1 in the unfolded state, as follows: Figure 11 As shown, the backrest frame 3 first drives the seat plate 2 to slide and retract towards the fixed seat 1 through the linkage mechanism 4, realizing the synchronous storage of the seat plate 2; when the backrest frame 3 rotates to the preset position, as... Figure 14 and Figure 15As shown, the second locking mechanism 7 can move relative to the fixed seat 1 under the drive of the backrest frame 3, causing the corresponding part of the second locking mechanism 7 to leave the rotation path of the armrest frame 6, so that the armrest frame 6 is no longer blocked by the second locking mechanism 7, and then can proceed as follows. Figures 7 to 9 The drive armrest 6 is rotated and retracted towards the fixed base 1, thereby realizing the folding and storage of the armrest 6.

[0066] Therefore, this embodiment, by setting the second locking mechanism 7, allows the backrest frame 3 to automatically release the lock on the armrest frame 6 during the rotation and folding process, without the need for separate operation of the armrest frame 6 to unlock it. Thus, when folding the seat assembly 1000, the user only needs to rotate the backrest frame 3 to sequentially complete the sliding and retracting operation of the seat board 2, the unlocking operation of the armrest frame 6, and the folding operation of the backrest frame 3 itself, thereby further simplifying the folding steps and improving the convenience of use.

[0067] In one embodiment, refer to Figure 14 and Figure 15 The second locking mechanism 7 includes a second locking pin 701 and a second elastic element 702. The second elastic element 702 is connected to the fixed base 1 and the second locking pin 701. The second locking pin 701 abuts against the handrail frame 6 under the elastic action of the second elastic element 702 to prevent the handrail frame 6 from rotating and retracting toward the fixed base 1. The backrest frame 3 has a disc cam structure 302, with the rotation axis of the backrest frame 3 as the rotation center; the working profile surface of the disc cam structure 302 retracts with the rotation of the backrest frame 3 and slides relative to the second locking pin 701, so as to drive the second locking pin 701 to separate from the armrest frame 6.

[0068] Specifically, the second elastic element 702 can be a compression spring, a tension spring, a torsion spring, an elastic colloid, etc.; the elastic force provided by the second elastic element 702 can push the second locking pin 701 toward the handrail frame 6, so that the second locking pin 701 contacts or engages with the handrail frame 6, thereby preventing the handrail frame 6 from rotating and retracting toward the fixed seat 1.

[0069] The backrest frame 3 is provided with a disc-shaped cam structure 302 at its rotation axis. The disc-shaped cam structure 302 rotates around the rotation axis of the backrest frame 3, that is, the disc-shaped cam structure 302 rotates coaxially with the backrest frame 3. The radial dimensions of different areas on the disc-shaped cam structure 302 are different. The outer periphery of the disc-shaped cam structure 302 constitutes its working profile surface. The relative position of the working profile surface and the second locking pin 701 is configured such that when the backrest frame 3 rotates, the working profile surface slides relative to the second locking pin 701.

[0070] Specifically, when the backrest frame 3 is in the unfolded state, such as Figure 14As shown, the near end of the working contour surface (i.e., the part with the smaller radial dimension) contacts the second locking pin 701. At this time, the second elastic element 702 is allowed to push the second locking pin 701 towards the armrest frame 6, so that the second locking pin 701 blocks the rotational retraction action of the armrest frame 6; when the backrest frame 3 rotates and retracts towards the fixed seat 1, as... Figure 15 As shown, the far end of the working contour surface (i.e. the part with a larger radial dimension) gradually contacts the second locking pin 701, which can push the second locking pin 701 to overcome the elastic force of the second elastic element 702 and move away from the handrail frame 6 until the second locking pin 701 separates from the handrail frame 6, thereby removing the obstruction to the handrail frame 6, so that the handrail frame 6 can rotate and retract towards the fixed seat 1.

[0071] In this embodiment, the rotational motion of the backrest frame 3 is converted into the linear motion of the second locking pin 701 by the disc cam structure 302, thereby realizing the function of automatically unlocking the armrest frame 6 when the backrest frame 3 rotates and retracts, which can improve the compactness of the overall linkage structure.

[0072] In one embodiment, refer to Figure 14 and Figure 15 The handrail 6 has a second limiting groove 601; the first end of the second locking pin 701 has a fastening part 7011, which is fastened in the second limiting groove 601 under the elastic action of the second elastic member 702. During the rotation and retraction of the backrest frame 3, the working contour surface of the disc cam structure 302 abuts against the second end of the second locking pin 701, thereby driving the fastening part 7011 to be pulled out from the second limiting groove 601.

[0073] Specifically, a disc-shaped structure can be provided at the rotation axis of the handrail 6, and the disc-shaped structure rotates together with the handrail 6 around its rotation axis; the second limiting groove 601 can be provided on the side of the disc-shaped structure facing away from the disc-shaped cam structure 302, and the second limiting groove 601 can be specifically set as a fan-shaped groove, the center of which is located on the rotation axis of the handrail 6, and the opening of which faces the fastening part 7011 of the second locking pin 701.

[0074] The engaging part 7011 is disposed at the first end of the second locking pin 701, and the shape of the engaging part 7011 matches the second limiting groove 601. Under the elastic force provided by the second elastic member 702, the engaging part 7011 will move in the direction close to the disc cam structure 302 and radially embed into the second limiting groove 601. Thus, the handrail frame 6 can be fixed at the current angle position through the snap-fit ​​between the engaging part 7011 and the second limiting groove 601, preventing the handrail frame 6 from rotating and retracting towards the fixed seat 1. At this time, the second end of the second locking pin 701 can maintain contact with or maintain a preset distance from the working contour surface of the disc cam structure 302.

[0075] Based on the above configuration, when the backrest frame 3 rotates and retracts towards the fixed base 1, as follows: Figure 14 As shown, the working profile of the disc cam structure 302 transitions from the proximal end to the distal end, and can gradually push the second end of the second locking pin 701 radially outward; under the action of this thrust, the second locking pin 701 will overcome the elastic force of the second elastic element 702 and move in a direction away from the handrail frame 6; as the second locking pin 701 moves, the latching part 7011 located at the first end of the second locking pin 701 will gradually be pulled out radially from the second limiting groove 601; as Figure 15 As shown, when the fastening part 7011 is completely disengaged from the second limiting groove 601, the blocking effect of the second locking pin 701 on the handrail frame 6 will be released, and the handrail frame 6 can be rotated in the counterclockwise direction to achieve folding.

[0076] In this embodiment, the snap-fit ​​between the fastening part 7011 and the second limiting groove 601 enables the second locking pin 701 to better withstand the force of the armrest frame 6 along the rotation and retraction direction when locked, thereby improving the overall structural stability of the seat assembly 1000 in the unfolded state, and without affecting the smooth completion of the subsequent unlocking operation of the second locking pin 701.

[0077] In one embodiment, refer to Figure 15 The second locking pin 701 is provided with a guide groove 7012; the handrail 6 is rotatably connected to the fixed seat 1 via a pivot 8, and the pivot 8 is slidably engaged in the guide groove 7012.

[0078] Specifically, the guide groove 7012 extends along the preset movement direction of the second locking pin 701 (i.e., the movement direction of the second locking pin 701 driven by the disc cam structure 302). The handrail 6 is rotatably connected to the fixed base 1 via a pivot 8, which passes through the guide groove 7012 and slides in engagement with it. Specifically, one end of the pivot 8 is disposed on the fixed base 1, the other end of the pivot 8 is connected to the handrail 6, and the middle part of the pivot 8 slides in engagement with the guide groove 7012.

[0079] When the second locking pin 701 moves away from the armrest frame 6 under the push of the disc cam structure 302, relative sliding will occur between the guide slide 7012 and the pivot 8. Through the sliding cooperation between the pivot 8 and the guide slide 7012, the movement trajectory of the second locking pin 701 will be restricted to the extension direction of the guide slide 7012. This can avoid the problem of angular deviation of the second locking pin 701 during movement. That is, by reusing the original pivot 8 on the seat assembly 1000, the guiding effect of the second locking pin 701 is achieved, which improves the stability of movement and cooperation between the components.

[0080] In one embodiment, refer to Figures 16 to 18 The seat assembly 1000 also includes a connector 9 and a third locking mechanism 10; the connector 9 is rotatably connected to the fixed seat 1, and the third locking mechanism 10 is connected to the backrest frame 3; the third locking mechanism 10 engages with the connector 9 and the fixed seat 1 in the locked state to prevent the connector 9 from rotating relative to the fixed seat 1. When the backrest frame 3 in the unfolded state rotates and retracts towards the fixed seat 1, the third locking mechanism 10 separates from the fixed seat 1 under the drive of the backrest frame 3.

[0081] In this embodiment, the connector 9 is used to dock with a frame with a walking function, thereby fixing the seat assembly 1000 to the frame to form a stroller, walker or other children's vehicle.

[0082] The third locking mechanism 10 can be connected to the backrest frame 3 by direct or indirect connection; the third locking mechanism 10 can move continuously with the rotation and retraction action of the backrest frame 3, and the third locking mechanism 10 can also be driven by contacting the preset part of the backrest frame 3 when the backrest frame 3 rotates to the preset position.

[0083] The third locking mechanism 10 has a locked state and an unlocked state. In the locked state, such as... Figure 17 As shown, the third locking mechanism 10 is connected to both the connector 9 and the fixed base 1. Specifically, a portion of the third locking mechanism 10 is rigidly engaged with the connector 9, and another portion is rigidly engaged with the fixed base 1. This achieves relative fixation between the connector 9 and the fixed base 1, preventing the connector 9 from rotating relative to the fixed base 1 around its rotation axis. In the unlocked state, as... Figure 18 As shown, the third locking mechanism 10 is separated from the fixed base 1, that is, at this time the third locking mechanism 10 is only connected to the plug-in 9, and the plug-in 9 can rotate freely relative to the fixed base 1.

[0084] The third locking mechanism 10 can adopt a structure such as a pin, locking block, or buckle. The third locking mechanism 10 can be connected and cooperated with the plug-in part 9 and the fixed seat 1 by means of abutment, insertion, or fastening. It is only necessary to ensure that the third locking mechanism 10 can be rigidly connected with the plug-in part 9 and the fixed seat 1 at the same time, and to ensure that the third locking mechanism 10 can be released from the connection with the fixed seat 1 under the action of the backrest frame 3. This embodiment does not limit the specific structural form of the third locking mechanism 10.

[0085] Based on the above settings, during the process of the backrest frame 3 rotating and retracting towards the fixed base 1 in the unfolded state, as follows: Figure 11 As shown, the backrest frame 3 first drives the seat plate 2 to slide and retract towards the fixed seat 1 through the linkage mechanism 4, realizing the synchronous storage of the seat plate 2; when the backrest frame 3 rotates to the first preset position, as shown... Figure 14 and Figure 15As shown, the second locking mechanism 7 can move relative to the fixed seat 1 under the drive of the backrest frame 3, causing the corresponding part of the second locking mechanism 7 to leave the rotation path of the armrest frame 6, so that the armrest frame 6 is no longer blocked by the second locking mechanism 7. Then, the armrest frame 6 can be driven to rotate and retract towards the fixed seat 1, thereby realizing the folding and storage of the armrest frame 6; when the backrest frame 3 continues to rotate to the second preset position, as Figure 17 and Figure 18 As shown, the backrest frame 3 will drive the third locking mechanism 10 to move, causing the third locking mechanism 10 to separate from the fixed base 1. This means that the third locking mechanism 10 is no longer simultaneously connected to the connector 9 and the fixed base 1, thereby releasing the rotation restriction on the connector 9. Then, it can be used as follows: Figure 10 The drive connector 9 shown rotates relative to the fixed base 1 to a preset storage position, thereby achieving the complete folding of the seat assembly 1000.

[0086] Therefore, by setting a third locking mechanism 10, the backrest frame 3 can automatically release the lock on the connector 9 during the rotation and folding process, without the need to operate the connector 9 separately to unlock it. Thus, when folding the seat assembly 1000, the user only needs to rotate the backrest frame 3 to complete the sliding and retracting operation of the seat plate 2, the unlocking operation of the armrest frame 6, the unlocking operation of the connector 9, and the folding operation of the backrest frame 3 itself in sequence, thereby further simplifying the folding steps and improving the convenience of use.

[0087] In one embodiment, refer to Figures 16 to 18 The backrest frame 3 and the connector 9 are rotatably connected to both sides of the fixed base 1 around the third axis X3; the connector 9 is provided with a first limiting cavity 9011, and the fixed base 1 is provided with a second limiting cavity 103, with the first limiting cavity 9011 and the second limiting cavity 103 being arranged opposite to each other; the third locking mechanism 10 includes a locking disc 1001, with both sides of the locking disc 1001 respectively engaging in the first limiting cavity 9011 and the second limiting cavity 103; The backrest frame 3 has an end face cam structure 303 on the side facing the fixed seat 1. The end face cam structure 303 takes the rotation axis of the backrest frame 3 as the rotation center. The working contour surface of the end face cam structure 303 pushes the locking plate 1001 to move axially in the direction close to the first limiting cavity 9011 as the backrest frame 3 rotates and retracts, so that the locking plate 1001 disengages from the second limiting cavity 103.

[0088] In this embodiment, the fixed base 1 has two oppositely arranged sides. The backrest frame 3 is rotatably connected to one side of the fixed base 1 around the third axis X3, and the connector 9 is also rotatably connected to the other side of the fixed base 1 around the third axis X3. Both the backrest frame 3 and the connector 9 can rotate independently relative to the fixed base 1. A first limiting cavity 9011 is provided on the side of the connector 9 facing the fixed base 1, and a second limiting cavity 103 is provided on the side of the fixed base 1 facing the connector 9. The openings of the first limiting cavity 9011 and the second limiting cavity 103 are opposite to each other.

[0089] The locking disc 1001 can be configured as a disc-shaped structure with a non-circular cross-section. The locking disc 1001 is located between the fixed base 1 and the connector 9. The end of the locking disc 1001 facing the connector 9 is engaged in the first limiting cavity 9011, and the end of the locking disc 1001 facing the fixed base 1 is engaged in the second limiting cavity 103. When the locking disc 1001 is engaged in both the first limiting cavity 9011 and the second limiting cavity 103, a rigid connection is formed between the connector 9 and the fixed base 1 through the locking disc 1001. At this time, the connector 9 cannot rotate relative to the fixed base 1 around the third axis X3.

[0090] A face cam structure 303 is provided on the side of the backrest frame 3 facing the fixed base 1. The face cam structure 303 rotates around the rotation axis of the backrest frame 3 (i.e., the third axis X3) as its center of rotation, and rotates synchronously with the backrest frame 3. The working profile surface of the face cam structure 303 is closed-loop, and there is a height difference in the axial direction of the backrest frame 3 (i.e., along the direction of the third axis X3). Specifically, the working profile surface has low point areas and high point areas distributed circumferentially, and the axial height of the profile surface gradually increases from the low point area to the high point area. Figure 16 In a specific example shown, a clearance channel can be provided on the side of the fixed seat 1 facing the backrest frame 3. The clearance channel is connected to the second limiting cavity 103. The end face cam structure 303 can pass through the clearance channel and extend into the second limiting cavity 103, so that the working profile surface of the end face cam structure 303 is in contact with the end of the locking disc 1001 located in the second limiting cavity 103.

[0091] Based on the above structural settings, such as Figure 17As shown, when the backrest frame 3 is in the unfolded state, the lower part of the working contour surface contacts the locking disc 1001. At this time, the locking disc 1001 is simultaneously engaged in the first limiting cavity 9011 and the second limiting cavity 103. When the backrest frame 3 rotates and retracts towards the fixed seat 1, the end face cam structure 303 rotates together with the backrest frame 3. The contact point between the working contour surface and the locking disc 1001 gradually transitions from the lower part to the higher part. In this way, the working contour surface can gradually push the locking disc 1001 outward along the axial direction during the rotation, that is, push the locking disc 1001 to move in the direction close to the first limiting cavity 9011, while causing the locking disc 1001 to gradually disengage from the second limiting cavity 103. Figure 18 As shown, when the backrest frame 3 rotates to the high point area of ​​the working contour surface and contacts the locking plate 1001, the locking plate 1001 completely disengages from the second limiting cavity 103. At this time, the locking plate 1001 only maintains a snap-fit ​​engagement with the first limiting cavity 9011, and the plug-in 9 can rotate freely relative to the fixed base 1. In turn, the plug-in 9 can be driven to rotate relative to the fixed base 1 to the preset storage position to complete the folding of the plug-in 9.

[0092] This embodiment increases the contact area by using a larger locking disc 1001, enabling the connector 9 and the fixed base 1 to withstand larger torsional loads, thereby improving the structural stability of the seat assembly 1000 in its unfolded state. Furthermore, this embodiment uses an end-face cam structure 303 to convert the rotational motion of the backrest frame 3 into axial movement of the locking disc 1001, achieving synchronous unlocking of the connector 9 during the rotation and retraction of the backrest frame 3. This ensures the normal operation of the unlocking function while maintaining a compact structural layout.

[0093] In one embodiment, refer to Figure 16 The first limiting cavity 9011 has at least two first sub-cavities (not shown in the figure) arranged at intervals around the third axis X3, and the second limiting cavity 103 has at least two second sub-cavities 1031 arranged at intervals around the third axis X3. The locking disc 1001 has a locking tooth portion 10011 for engaging in at least one first sub-cavity and for engaging in at least one second sub-cavity 1031.

[0094] Specifically, the locking disc 1001 may include a central disc body and a locking tooth portion 10011 disposed on the outer periphery of the central disc body, the locking tooth portion 10011 protruding radially outward.

[0095] Corresponding to the locking disc 1001, the first limiting cavity 9011 may include a first central cavity and at least two first sub-cavities. The first central cavity is used to accommodate the central disc, and the at least two first sub-cavities are arranged at intervals around a third axis X3 on the outer periphery of the first central cavity. The shape of each first sub-cavity is adapted to the locking teeth 10011. Similarly, the second limiting cavity 103 may include a second central cavity and at least two second sub-cavities 1031. The second central cavity is used to accommodate the central disc, and the at least two second sub-cavities 1031 are arranged at intervals around a third axis X3 on the outer periphery of the second central cavity. The shape of each second sub-cavity 1031 is adapted to the locking teeth 10011.

[0096] Based on the above structural configuration, when the locking disc 1001 is in the locked state, it simultaneously engages with the first limiting cavity 9011 and the second limiting cavity 103; at the same time, the locking teeth 10011 engage with one set of first sub-cavities and one set of second sub-cavities 1031. After the locking disc 1001 completes the unlocking operation under the drive of the end face cam structure 303, the connector 9 can rotate relative to the fixed seat 1 to another angular position, and then drive the locking disc 1001 to re-enter the locked state, so that the locking teeth 10011 engage with the other set of second sub-cavities 1031, thereby fixing the connector 9 at the current angular position.

[0097] This embodiment provides multiple circumferential locking positions through the engagement of the locking teeth 10011 with multiple first sub-cavities and multiple second sub-cavities 1031, thereby enabling relative locking between the connector 9 and the fixed base 1 at different angles. This allows the connector 9 to be locked at different angles as needed, thus improving ease of use.

[0098] In one embodiment, refer to Figure 16 The third locking mechanism 10 also includes a third elastic element 1002, which is connected to the plug-in 9 and the locking disc 1001. Under the elastic action of the third elastic element 1002, the locking disc 1001 moves axially in the direction close to the second limiting cavity 103.

[0099] Specifically, the third elastic element 1002 can be a compression spring, a tension spring, a torsion spring, an elastic colloid, etc. The elastic force provided by the third elastic element 1002 can push the locking disc 1001 axially, causing the locking disc 1001 to move towards the second limiting cavity 103; thus, after the pushing action of the end face cam structure 303 on the locking disc 1001 is released, the third elastic element 1002 can push the locking disc 1001 back into the second limiting cavity 103, thereby allowing the locking disc 1001 to automatically reset to the locked state without manual intervention.

[0100] This application also provides a stroller; please refer to [link / reference]. Figure 19 The stroller includes a frame 11 and a seat assembly 1000 as described in any of the above embodiments; the seat assembly 1000 is detachably connected to the frame 11.

[0101] In this embodiment, "children's vehicle" can refer to a stroller, walker, or other tool that has the function of carrying people and walking; "frame 11" can refer to the main body of the children's vehicle, such as the frame of a stroller or a walker, etc., and is not limited here.

[0102] The detachable connection between the seat assembly 1000 and the frame 11 can be achieved using any quick-release structure. Specifically, a pin can be provided on the seat assembly 1000, which slides into a corresponding slot on the frame 11. Once the pin is inserted into the slot, it can be automatically locked by a spring-loaded latch. Alternatively, a buckle can be provided on the seat assembly 1000 to engage with and fix it to structures such as crossbeams, rods, and connecting slots on the frame 11. A magnetic-mechanical composite interface can also be used between the seat assembly 1000 and the frame 11. First, the magnetic attraction of the device achieves pre-positioning between the seat assembly 1000 and the frame 11, and then the mechanical buckle secures them together. All of these methods enable quick installation and removal of the seat assembly 1000 from the frame 11. The specific configuration can be flexibly chosen as needed in practical applications and is not limited here.

[0103] For the specific structure of the seat assembly 1000, please refer to the above embodiments. Since this stroller adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be repeated here.

[0104] In one embodiment, refer to Figure 19 The frame 11 is provided with a plug slot 1101; the seat assembly 1000 includes a plug 9, which is connected to the fixed seat 1 and is detachably plugged into the plug slot 1101.

[0105] Specifically, the insertion slot 1101 can be a recessed cavity or a sleeve structure with an opening. The insertion member 9 has at least one insertion portion whose shape is adapted to the insertion slot 1101 so that the insertion portion can be inserted into the insertion slot 1101 in a preset direction, thereby realizing the insertion engagement between the insertion member 9 and the insertion slot 1101, which can conveniently fix the seat assembly 1000 to the frame 11; subsequently, the insertion portion of the insertion member 9 can be pulled out from the insertion slot 1101, thereby conveniently completing the disassembly and separation of the seat assembly 1000 from the frame 11.

[0106] In one embodiment, refer to Figure 20 and Figure 21 The insertion groove 1101 has a first latching part 11011 protruding therein; the insertion member 9 includes a base 901, a second operating member 902 and a fourth elastic member 903; the base 901 is connected to the fixed base 1; the second operating member 902 is movably connected to the base 901, and the second operating member 902 has a second latching part 9021, which is detachably inserted into the insertion groove 1101; the fourth elastic member 903 is connected to the base 901 and the second operating member 902. When the second operating member 902 is in the locked position relative to the seat 901, the second latching part 9021 is engaged with the first latching part 11011, and the first latching part 11011 is used to prevent the second latching part 9021 from being pulled out of the insertion slot 1101; when the second operating member 902 is in the unlocked position relative to the seat 901, the second latching part 9021 is separated from the first latching part 11011; the elastic force provided by the fourth elastic member 903 is used to keep the second operating member 902 in the locked position.

[0107] Specifically, such as Figure 20 and Figure 21 As shown, taking the insertion direction of the connector 9 as vertical as an example, the insertion groove 1101 extends vertically, with its opening facing upwards. The first latching part 11011 protrudes from the vertical side wall of the insertion groove 1101. The second operating member 902 slides horizontally within the seat 901. The upper part of the second operating member 902 has a pressing part exposed on the side of the seat 901, and the lower part of the second operating member 902 has a second latching part 9021 exposed below the seat 901. The second latching part 9021 extends vertically... Extending in a straight direction, the bottom end of the second latching part 9021 has a hook-shaped structure protruding in a horizontal direction; the fourth elastic member 903 can be a compression spring, tension spring, torsion spring, elastic colloid, etc. The left end of the fourth elastic member 903 is connected to the second operating member 902, and the right end of the fourth elastic member 903 is connected to the seat 901. The elastic force provided by the fourth elastic member 903 can drive the second operating member 902 to move to the left relative to the seat 901, so that the second latching part 9021 is close to the first latching part 11011 in the horizontal direction.

[0108] Based on the above configuration, in actual operation, the second latching part 9021 can be vertically inserted downwards into the area of ​​the insertion slot 1101 that is not blocked by the first latching part 11011. Then, with the elastic action of the fourth elastic member 903, the second operating member 902 is moved horizontally to the left, causing the hook-shaped structure at the bottom of the second latching part 9021 to move below the first latching part 11011. At this time, as... Figure 20As shown, the second latching part 9021 will be latched onto the first latching part 11011 under the continuous elastic force provided by the fourth elastic member 903. The first latching part 11011 can prevent the second latching part 9021 from moving upward, thus preventing the second latching part 9021 from disengaging from the insertion slot 1101 when subjected to an upward force, thereby realizing the insertion and fixation of the seat assembly 1000 on the frame 11.

[0109] If it is necessary to remove the seat assembly 1000 from the frame 11 in the future, such as Figure 21 As shown, by pressing the pressing part on the upper side of the second operating member 902, the second operating member 902 overcomes the elastic force of the fourth elastic member 903 and moves horizontally to the right until the second latching part 9021 moves to the right into the area of ​​the insertion groove 1101 that is not blocked by the first latching part 11011; at this time, the seat assembly 1000 can be taken out vertically upward, so that the second latching part 9021 is disengaged from the insertion groove 1101, thereby realizing the unlocking operation of the connector 9 and the convenient removal of the seat assembly 1000.

[0110] In one embodiment, refer to Figures 20 to 22 The second operating member 902 is provided with a third limiting groove 9022; the stroller also includes a fifth elastic member 12 and a stop buckle 13, the fifth elastic member 12 being connected to the frame 11 and the stop buckle 13; When the second operating member 902 is in the locked position, the stop buckle 13 abuts against the surface of the second operating member 902 under the elastic action of the fifth elastic member 12; when the second operating member 902 is in the unlocked position, the third limiting groove 9022 is opposite to the stop buckle 13, and the stop buckle 13 is inserted into the third limiting groove 9022 under the elastic action of the fifth elastic member 12 to prevent the second operating member 902 from resetting to the locked position.

[0111] Specifically, the fifth elastic element 12 can be a compression spring, tension spring, torsion spring, elastic colloid, etc.; the lower end of the fifth elastic element 12 is connected to the frame 11, and the upper end of the fifth elastic element 12 is connected to the stop buckle 13. The elastic force provided by the fifth elastic element 12 can drive the stop buckle 13 to move upward, so that the upper end of the stop buckle 13 abuts against the target bottom surface of the second operating member 902; correspondingly, the third limiting groove 9022 is also provided on the target bottom surface of the second operating member 902.

[0112] like Figure 20As shown, when the second latching part 9021 is engaged with the first latching part 11011, causing the connector 9 to be locked on the frame 11, the third limiting groove 9022 and the stop buckle 13 are spaced apart on the horizontal projection plane. That is, at this time, the third limiting groove 9022 is not opposite to the stop buckle 13, and the stop buckle 13 will abut against the target bottom surface where the third limiting groove 9022 is located under the elastic force of the fifth elastic member 12. When it is necessary to remove the seat assembly 1000 from the frame 11, the user drives the second operating member 902 to move horizontally to the right by pressing to overcome the elastic force of the fourth elastic member 903; during the process of the second operating member 902 moving to the right, the third limiting groove 9022 will gradually approach the stop buckle on the horizontal projection plane; as Figure 21 and Figure 22 As shown, when the second latching part 9021 moves to the right to the area in the insertion groove 1101 that is not blocked by the first latching part 11011, the third limiting groove 9022 also moves synchronously to the position opposite to the stop lock. At this time, the stop lock will be inserted upward into the third limiting groove 9022 under the elastic force of the fifth elastic member 12. Through the latching engagement between the stop lock and the third limiting groove 9022, the second operating member 902 can be prevented from moving horizontally to the left. At this time, even if the user removes the pressing force applied to the second operating member 902, the second operating member 902 cannot be reset to the left under the elastic force of the fourth elastic member 903. That is, at this time, the second latching part 9021 can continue to maintain the separated state from the first latching part 11011. The user can remove the seat assembly 1000 vertically upward when the second operating member 902 is stopped, so as to complete the removal operation of the seat assembly 1000 from the frame 11.

[0113] As can be seen, this embodiment achieves automatic maintenance of the unlocked state of the connector 9 through the cooperation between the stop buckle 13 and the third limiting groove 9022. The user does not need to continuously press the second operating member 902 when pulling out the connector 9, thereby improving the convenience of disassembling the seat assembly 1000.

[0114] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A seat assembly (1000), characterized in that, The seat assembly (1000) includes: Fixed base (1); The seat plate (2) is slidably fitted onto the fixed seat (1); The backrest frame (3) is rotatably connected to the fixed base (1); Linkage mechanism (4), which is connected to the backrest frame (3) and the seat plate (2); When the backrest frame (3) in the unfolded state rotates and retracts toward the fixed seat (1), the linkage mechanism (4) drives the seat plate (2) to slide and retract toward the fixed seat (1) under the drive of the backrest frame (3).

2. The seat assembly (1000) according to claim 1, characterized in that, The backrest frame (3) has a transmission part (301); when the backrest frame (3) rotates and retracts toward the fixed seat (1), the transmission part (301) generates a displacement in a preset direction, which is the direction in which the seat plate (2) slides and retracts toward the fixed seat (1); The linkage mechanism (4) includes a first link (401); the first end of the first link (401) is rotatably connected to the transmission part (301), and the second end of the first link (401) is rotatably connected to the seat plate (2); the first link (401) pulls the seat plate (2) towards the fixed seat (1) under the drive of the backrest frame (3).

3. The seat assembly (1000) according to claim 1, characterized in that, The fixed base (1) is provided with a guide structure (101), and the base plate (2) is provided with a mating structure (201); the guide structure (101) and the mating structure (201) are in sliding fit. One of the guide structure (101) and the mating structure (201) is a guide slider, and the other of the guide structure (101) and the mating structure (201) is a guide groove.

4. The seat assembly (1000) according to claim 3, characterized in that, The guide structure (101) is provided with a roller (1011), which is rolled and engaged with the mating structure (201).

5. The seat assembly (1000) according to claim 1, characterized in that, The seat assembly (1000) further includes a first locking mechanism (5) which is movably connected to the backrest frame (3); The first locking mechanism (5) is connected to the fixed seat (1) in the locked state to prevent the backrest frame (3) from rotating relative to the fixed seat (1); and the first locking mechanism (5) is separated from the fixed seat (1) in the unlocked state.

6. The seat assembly (1000) according to claim 5, characterized in that, The fixed base (1) is provided with a first limiting groove (102); the first locking mechanism (5) includes a first locking pin (501) and a first elastic element (502), the first elastic element (502) is connected to the backrest frame (3) and the first locking pin (501); the first locking pin (501) is engaged in the first limiting groove (102) under the elastic action of the first elastic element (502).

7. The seat assembly (1000) according to claim 6, characterized in that, The first locking mechanism (5) further includes a first operating member (503) and a traction cable (504); the first operating member (503) is rotatably connected to the backrest frame (3); the traction cable (504) is embedded in the backrest frame (3), the first end of the traction cable (504) is connected to the first operating member (503), and the second end of the traction cable (504) is connected to the first locking pin (501); During the process of the first operating member (503) rotating to the unlocked state, the first operating member (503) pulls the first locking pin (501) and the first limiting groove (102) apart through the traction cable (504).

8. The seat assembly (1000) according to claim 1, characterized in that, The seat assembly (1000) further includes an armrest frame (6) and a second locking mechanism (7); the armrest frame (6) is rotatably connected to the fixed seat (1); the second locking mechanism (7) is connected to the backrest frame (3); the second locking mechanism (7) blocks the rotation path of the armrest frame (6) in the locked state to prevent the armrest frame (6) from rotating and retracting toward the fixed seat (1); When the backrest frame (3) in the unfolded state rotates and retracts toward the fixed seat (1), the second locking mechanism (7) leaves the rotation path of the armrest frame (6) under the drive of the backrest frame (3).

9. The seat assembly (1000) according to claim 8, characterized in that, The second locking mechanism (7) includes a second locking pin (701) and a second elastic member (702). The second elastic member (702) is connected to the fixed seat (1) and the second locking pin (701). The second locking pin (701) abuts against the handrail frame (6) under the elastic action of the second elastic member (702) to prevent the handrail frame (6) from rotating and retracting toward the fixed seat (1). The backrest frame (3) has a disc cam structure (302), which takes the rotation axis of the backrest frame (3) as the rotation center; the working contour surface of the disc cam structure (302) retracts with the rotation of the backrest frame (3) and slides relative to the second locking pin (701) to drive the second locking pin (701) to separate from the armrest frame (6).

10. The seat assembly (1000) according to claim 9, characterized in that, The handrail (6) has a second limiting groove (601); the first end of the second locking pin (701) has a fastening part (7011), which is fastened in the second limiting groove (601) under the elastic action of the second elastic member (702); During the rotation and retraction of the backrest frame (3), the working contour surface of the disc cam structure (302) abuts against the second end of the second locking pin (701) to drive the fastening part (7011) to be pulled out from the second limiting groove (601).

11. The seat assembly (1000) according to claim 9, characterized in that, The second locking pin (701) is provided with a guide groove (7012); the handrail (6) is rotatably connected to the fixed base (1) via a pivot (8), and the pivot (8) is slidably engaged in the guide groove (7012).

12. The seat assembly (1000) according to claim 1, characterized in that, The seat assembly (1000) further includes a connector (9) and a third locking mechanism (10); the connector (9) is rotatably connected to the fixed seat (1), and the third locking mechanism (10) is connected to the backrest frame (3); the third locking mechanism (10) engages with the connector (9) and the fixed seat (1) in the locked state to prevent the connector (9) from rotating relative to the fixed seat (1); When the backrest frame (3) in the unfolded state rotates and retracts toward the fixed seat (1), the third locking mechanism (10) separates from the fixed seat (1) under the drive of the backrest frame (3).

13. The seat assembly (1000) according to claim 12, characterized in that, The backrest frame (3) and the connector (9) are rotatably connected to both sides of the fixed base (1) around the third axis (X3); the connector (9) is provided with a first limiting cavity (9011), and the fixed base (1) is provided with a second limiting cavity (103), the first limiting cavity (9011) and the second limiting cavity (103) are arranged opposite to each other; the third locking mechanism (10) includes a locking disc (1001), and both sides of the locking disc (1001) are respectively engaged in the first limiting cavity (9011) and the second limiting cavity (103); The backrest frame (3) has an end face cam structure (303) on the side facing the fixed seat (1). The end face cam structure (303) takes the rotation axis of the backrest frame (3) as the rotation center. The working contour surface of the end face cam structure (303) retracts as the backrest frame (3) rotates, pushing the locking disc (1001) to move axially in the direction close to the first limiting cavity (9011), so that the locking disc (1001) disengages from the second limiting cavity (103).

14. The seat assembly (1000) according to claim 13, characterized in that, The first limiting cavity (9011) has at least two first sub-cavities arranged at intervals around the third axis (X3), and the second limiting cavity (103) has at least two second sub-cavities (1031) arranged at intervals around the third axis (X3). The locking disc (1001) has locking teeth (10011) for engaging in at least one first sub-cavity and for engaging in at least one second sub-cavity (1031).

15. The seat assembly (1000) according to claim 13, characterized in that, The third locking mechanism (10) further includes a third elastic element (1002), which is connected to the plug (9) and the locking disc (1001); the locking disc (1001) moves axially in the direction close to the second limiting cavity (103) under the elastic action of the third elastic element (1002).

16. A children's stroller, characterized in that, The stroller includes a frame (11) and a seat assembly (1000) as claimed in any one of claims 1 to 15; the seat assembly (1000) is detachably connected to the frame (11).

17. The stroller according to claim 16, characterized in that, The frame (11) is provided with a plug slot (1101); the seat assembly (1000) includes a plug (9), the plug (9) is connected to the fixed seat (1), and the plug (9) is detachably plugged into the plug slot (1101).

18. The stroller according to claim 17, characterized in that, The insertion slot (1101) has a first latching part (11011) protruding therein; the insertion member (9) includes a base (901), a second operating member (902) and a fourth elastic member (903); the base (901) is connected to the fixed base (1); the second operating member (902) is movably connected to the base (901), and the second operating member (902) has a second latching part (9021), which is detachably inserted into the insertion slot (1101); the fourth elastic member (903) is connected to the base (901) and the second operating member (902); When the second operating member (902) is in the locked position relative to the seat (901), the second latching part (9021) is engaged with the first latching part (11011), and the first latching part (11011) is used to prevent the second latching part (9021) from being pulled out of the insertion slot (1101); when the second operating member (902) is in the unlocked position relative to the seat (901), the second latching part (9021) is separated from the first latching part (11011); the elastic force provided by the fourth elastic member (903) is used to keep the second operating member (902) in the locked position.

19. The stroller according to claim 18, characterized in that, The second operating member (902) is provided with a third limiting groove (9022); the stroller also includes a fifth elastic member (12) and a stop buckle (13), the fifth elastic member (12) being connected to the frame (11) and the stop buckle (13); When the second operating member (902) is in the locked position, the stop buckle (13) abuts against the surface of the second operating member (902) under the elastic action of the fifth elastic member (12); when the second operating member (902) is in the unlocked position, the third limiting groove (9022) is opposite to the stop buckle (13), and the stop buckle (13) is inserted into the third limiting groove (9022) under the elastic action of the fifth elastic member (12) to prevent the second operating member (902) from resetting to the locked position.

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