Folding seat structure with foldable backrest

Abstract

The utility model relates to the technical field of doll cars, in particular to a folding seat structure with a foldable backrest, which is characterized in that a pressing block is arranged on the backrest, the pressing block is positioned at the joint of the backrest and the seat, a steel wire connector is arranged in the seat, the pressing block pulls one end of a steel wire through the steel wire connector, and the other end of the steel wire is connected to a transmission part. A downward pressing piece is arranged below the transmission piece, the bottom of the downward pressing piece abuts against the sliding block, a limiting clamping block is arranged in the connecting position between the seat and the vehicle base, and the sliding block abuts against one end of the limiting clamping block. The folding chair has the advantages that when the backrest is folded, the pressing block is used for pulling the steel wire to drive the transmission piece to move downwards, and the pressing piece, the sliding block and the limiting clamping block are sequentially driven to move downwards, so that limitation of the seat and the vehicle base is released, the folding action is completed, and the folding step of the baby sliding chair can be completed without pressing other buttons additionally; and the overall structural design is reasonable, and the flexibility is higher.

Description

Technical Field

[0001] This utility model relates to the field of stroller technology, and more specifically, to a folding seat structure with a backrest. Background Technology

[0002] A stroller is a convenient vehicle designed for infants' outdoor activities. It's one of babies' favorite modes of transportation and an essential item for mothers when taking their babies shopping. However, the inventors have discovered that currently, stroller seats fold down only after the handle is closed, which can easily lead to accidental folding by consumers.

[0003] In view of the aforementioned deficiencies in the folding structure of strollers, and adhering to the spirit of research, innovation, and continuous improvement, the applicant, combining production practice and utilizing professional and scientific methods, proposes a practical solution and therefore submits this application. Utility Model Content

[0004] The backrest-folding folding seat structure aims to solve the problem of accidental seat folding due to consumer misoperation. In existing technology, stroller seats only fold after the handlebars are folded, which can easily lead to accidental folding and pose a safety hazard. To solve this problem, the inventors designed a structure where the seat can only fold after the backrest is folded, thereby preventing the risk of children falling due to accidental folding.

[0005] A folding backrest seat structure includes: a backrest, a seat, armrests, and a base. The backrest is mounted on the seat, and the seat is mounted on the base. Both ends of the armrests are connected to the connection points of the backrest and the seat. The backrest is provided with a pressing block located at the connection point between the backrest and the seat. A steel wire connector is provided inside the seat. The pressing block pulls one end of the steel wire through the steel wire connector. The other end of the steel wire is connected to a transmission component. A pressing component is provided below the transmission component. The bottom of the pressing component abuts against a sliding block. A limiting block is provided inside the connection point between the seat and the base. The sliding block abuts against one end of the limiting block. A return spring is provided at the other end of the limiting block. Pressure springs are provided at the bottom of both the pressing component and the transmission component.

[0006] Specifically, the seat consists of an upper sliding seat, a lower fixed seat, and a mounting base. The upper sliding seat is mounted on the mounting base and moves back and forth along the slide rail. The mounting base is mounted on the lower fixed seat, which is hinged to the mounting rod of the vehicle base.

[0007] Specifically, the transmission component is disposed between the mounting base and the upper sliding seat. The transmission component moves back and forth along the sliding groove inside the mounting base. The transmission component has an upwardly extending protrusion in the middle, which abuts against the inclined surface on one side of the lower pressure component. The lower sides of the transmission component have protrusions for installing pressure springs.

[0008] Specifically, the pressing component is mounted on the mounting base, with its bottom penetrating the mounting base. The pressing component has an inclined surface at both its top and bottom, and the pressing component presses against the transmission component and the sliding block through the two inclined surfaces respectively.

[0009] Specifically, the sliding block is set in the hole of the lower fixed seat and moves up and down along the hole. The sliding block has side limit hooks that are locked at the edge of the hole of the lower fixed seat.

[0010] Specifically, the mounting rod is provided with mounting holes, and the limiting block is inserted into the mounting holes. The front end of the limiting block can extend into the hole of the lower fixing seat.

[0011] Specifically, the transmission component is installed in the fixed slot of the upper sliding seat and moves up and down within the fixed slot.

[0012] Specifically, the pressing component has barbs on both sides, and the pressing component is engaged in the groove of the mounting base by means of the barbs.

[0013] Specifically, the front end of the limiting block is a transition slope, and the top of the transition slope has a rounded corner.

[0014] The beneficial effects of this utility model are as follows: When folding the backrest, the pressing block is used to pull the steel wire to drive the transmission component to move downward, which in turn drives the pressing component, sliding block and limiting block to move downward, thereby releasing the restriction of both the seat and the car base and completing the folding action. The folding steps of the stroller can be completed without pressing other buttons, which is extremely convenient and quick. The overall structure design is reasonable and more flexible. The seat and car base can only be folded when the backrest can be folded, avoiding accidental folding of the seat and injury to children. Attached Figure Description

[0015] Appendix Figure 1 This is a perspective view of the present utility model;

[0016] Appendix Figure 2 This is a structural schematic diagram of the seat of this utility model;

[0017] Appendix Figure 3 This is a schematic diagram of the structure of the vehicle base of this utility model;

[0018] Appendix Figure 4 This is a cross-sectional view of the vehicle base of this utility model;

[0019] Appendix Figure 5 This is a partial enlarged view of the seat and backrest of this utility model;

[0020] Appendix Figure 6 This is a schematic diagram of the internal structure of the connection between the seat and the vehicle base of this utility model.

[0021] Instructions and markings: 1. Backrest; 2. Seat; 3. Armrest; 4. Car base; 5. Pressing block; 6. Steel wire connector; 7. Transmission component; 8. Lower pressing component; 9. Limiting block; 10. Sliding block; 21. Upper sliding seat; 22. Lower fixed seat and 23. Mounting base; 41. Mounting rod; 71. Protrusion; 81. Barb; 101. Side limiting hook. Detailed Implementation

[0022] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0023] Please see Figures 1 to 6 As shown, a folding seat structure with a backrest includes: a backrest, a seat, armrests, and a base. The backrest is mounted on the seat, and the seat is mounted on the base. Both ends of the armrests are connected to the connection points of the backrest and the seat. The backrest has a pressing block located at the connection point between the backrest and the seat. The seat has a steel wire connector inside, through which the pressing block pulls one end of the steel wire. The other end of the steel wire is connected to a transmission component. A pressing component is located below the transmission component, with its bottom pressing against a sliding block. A limiting block is located inside the connection point between the seat and the base, with the sliding block pressing against one end of the limiting block. A return spring is located at the other end of the limiting block. Both the pressing component and the transmission component have pressure springs at their bottoms. The pressure springs can drive the pressing component and the transmission component to return to their upward position, and the return springs also cause the limiting block to return to its upward position.

[0024] In the above solution, the seat consists of an upper sliding seat, a lower fixed seat, and a mounting base. The upper sliding seat is mounted on the mounting base and moves back and forth along a slide rail. The mounting base is mounted on the lower fixed seat, which is hinged to a mounting rod on the vehicle base. The upper sliding seat allows for back and forth movement of the seat position. The mounting base is used to mount the various internal components and enable their interlocking. Finally, the lower fixed seat is mounted on a main rod on the vehicle base and connected to each other using a hinge. The lower fixed seat can rotate a certain angle around a pivot point at the connection point to achieve seat folding.

[0025] In the above-described scheme, the transmission component is positioned between the mounting base and the upper sliding seat. The transmission component moves back and forth along a groove inside the mounting base. A protrusion extending upwards is located in the middle of the transmission component, pressing against the inclined surface of one side of the lower pressure component. Protrusions for mounting pressure springs are located on the lower sides of the transmission component. The transmission component is positioned within a fixed slot of the upper sliding seat and moves up and down within this slot. Under the action of the pressure springs on both sides, the transmission component can move within the fixed slot of the sliding seat. Simultaneously, with the linkage of other components, the upper sliding seat moves back and forth, causing its transmission component to move back and forth along the groove inside the mounting base. During this movement, the lower pressure component is pushed downwards.

[0026] In the above scheme, the pressing component is set on the mounting base, and the bottom of the pressing component penetrates through the mounting base. The top and bottom of the pressing component are both provided with an inclined surface. The pressing component presses against the transmission component and the sliding block through the two inclined surfaces respectively. The pressing component is provided with barbs on both sides. The pressing component is locked in the groove of the mounting base by the barbs. A pressure spring is provided at the bottom of the pressing component. Applying an upward force can reset it, while the barbs are locked on the step of the groove, limiting the upward displacement distance of the pressing component.

[0027] In the above solution, the sliding block is set in the hole of the lower fixed seat and moves up and down along the hole. The sliding block has limit hooks on both sides, with the side limit hooks locking into the edge of the hole of the lower fixed seat. The lower pressure member presses against the upper part of the side limit hooks, while the lower part is pressed against by the limit block. The sliding block plays a pushing role. The gap between the sliding block and the limit block is ensured at the rotational connection between the seat and the car base, thereby releasing the restriction relationship between the seat and the car base.

[0028] In the above solution, the mounting rod is provided with mounting holes, and the limiting block is inserted into the mounting holes. The front end of the limiting block can extend into the hole of the lower fixing seat. The front end of the limiting block is a transition slope with a rounded corner at the top. When the limiting block is locked at the rotating connection between the seat and the car base, it is in a restrictive relationship, and the two cannot move relative to each other. The infant seat is guaranteed to be in the unfolded state, and the child can sit safely.

[0029] Seat folding procedure: The user simply presses the folding button on the backrest. As the backrest folds down, the pressing block rotates, pulling the steel cable through the steel cable connector. The other end of the steel cable pulls the transmission component downward. During the downward movement, the upper sliding seat continues to move forward along the track of the mounting base and presses against the inclined surface at the top of the lower pressing component. It then presses down on the lower pressing component, pushing the sliding block down along the hole in the lower fixing seat. This pushes the limiting block downward, causing it to disengage from the connection between the seat and the base, releasing the restriction between the two. Then, the seat and backrest fold down together, completing the seat folding.

[0030] To unfold the seat: Simply fold the seat and backrest upwards. The return spring at the bottom of the limiting block pushes it upwards, and the sliding block moves upwards accordingly. The limiting block then locks into the connection between the seat and the base. The pressing and transmission components move upwards and reset under the action of the pressure spring. When the backrest is folded upwards, the pressing block also releases the tension of the steel wire connector, thus unfolding the seat.

[0031] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A folding backrest seat structure, comprising: The device comprises a backrest, a seat, armrests, and a base. The backrest is mounted on the seat, and the seat is mounted on the base. The armrests are connected at both ends to the connection points of the backrest and the seat. The backrest has a pressing block located at the connection point between the backrest and the seat. The seat has a steel wire connector inside. The pressing block pulls one end of the steel wire through the connector. The other end of the steel wire is connected to a transmission component. A pressing component is located below the transmission component, with its bottom pressing against a sliding block. A limiting block is located inside the connection point between the seat and the base, with the sliding block pressing against one end of the limiting block. A return spring is located at the other end of the limiting block. Pressure springs are located at the bottom of both the pressing component and the transmission component.

2. The folding backrest seat structure according to claim 1, characterized in that: The seat consists of an upper sliding seat, a lower fixed seat, and a mounting base. The upper sliding seat is mounted on the mounting base and moves back and forth along the slide rail. The mounting base is mounted on the lower fixed seat, which is hinged to the mounting rod of the vehicle base.

3. The folding backrest seat structure according to claim 1, characterized in that: The transmission component is disposed between the mounting base and the upper sliding seat. The transmission component moves back and forth along the sliding groove inside the mounting base. A protrusion extending upward is provided in the middle of the transmission component. The protrusion abuts against the inclined surface on one side of the lower pressure component. Protrusions for installing pressure springs are provided on the lower sides of the transmission component.

4. The folding backrest seat structure according to claim 3, characterized in that: The pressing component is mounted on the mounting base, with its bottom penetrating the mounting base. The pressing component has an inclined surface at both its top and bottom, and the pressing component presses against the transmission component and the sliding block through the two inclined surfaces respectively.

5. The folding backrest seat structure according to claim 4, characterized in that: The sliding block is set in the hole of the lower fixed seat and moves up and down along the hole. The sliding block has side limit hooks that are locked at the edge of the hole of the lower fixed seat.

6. The folding backrest seat structure according to claim 5, characterized in that: The mounting rod has mounting holes, and the limiting block is inserted into the mounting holes. The front end of the limiting block can extend into the hole of the lower fixing seat.

7. A folding backrest seat structure according to claim 3 or 6, characterized in that: The transmission component is installed in the fixed slot of the upper sliding seat and moves up and down within the fixed slot.

8. A folding backrest seat structure according to claim 4 or 6, characterized in that: The pressing component has barbs on both sides, and the pressing component is engaged in the groove of the mounting base by the barbs.

9. A folding backrest seat structure according to claim 5 or 6, characterized in that: The front end of the limiting block is a transition slope, and the top of the transition slope has a rounded corner.

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