Backrest folding and armrest folding structure

Abstract

The utility model relates to the technical field of baby carriages, in particular to a folding backrest and armrest structure, which is characterized in that iron sheets are arranged at two ends of an armrest, the iron sheets are inserted in slots of mounting parts on two sides of a seat, locking clamping plates are arranged in the mounting parts, and upper convex columns at one ends of the locking clamping plates extend outwards to the outer surfaces of the mounting parts. The rotating disc of the backrest is located on the inner sides of the installation parts on the two sides of the seat, a limiting face is arranged in the rotating disc of the backrest, the upper protruding column moves along the limiting face, a lower protruding column is arranged at the other end of the locking clamping plate, a limiting groove is formed in one side face of the iron sheet, and a clamping groove is formed below the bottom of the iron sheet. The baby sliding chair has the beneficial effects that the locking clamping plate is driven by the rotatable disc to move downwards, so that the locking clamping plate is separated from the iron sheets at the two ends of the armrest, the armrest can freely turn over, the armrest and the backrest can simultaneously turn over downwards, and the folding step of the baby sliding chair can be completed without pressing other buttons, so that the baby sliding chair is extremely convenient and quick; and the whole structure is reasonable in design and higher in flexibility.

Description

Technical Field

[0001] This utility model relates to the field of stroller technology, and more specifically, to a structure for folding backrests and armrests. Background Technology

[0002] A stroller is a tool designed to facilitate outdoor activities for infants. It is one of the most beloved modes of transportation for babies and an essential item for mothers when taking their babies shopping. However, the inventor discovered that current strollers require pressing a button on the side to unlock the handlebars. To solve this problem, the inventor designed a system where the handlebars fold down simultaneously with the backrest.

[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 purpose of this invention is to provide a structure that allows for the folding of the backrest and armrest, addressing the limitations of existing technologies. This design enables the backrest and armrest to fold simultaneously, making it more convenient and faster.

[0005] A folding backrest and armrest structure includes: a backrest, a seat, armrests, and a stroller base. The stroller base is equipped with a seat and a backrest. The armrests are connected to the backrest and seat at both ends. Each end of the armrest has a metal plate inserted into a slot in the mounting portion on both sides of the seat. The mounting portion has a locking plate inside. One end of the locking plate has an upper protrusion extending outward to the outer surface of the mounting portion. The rotating disc of the backrest is located inside the mounting portion on both sides of the seat. The rotating disc of the backrest has a limiting surface inside. The upper protrusion moves along the limiting surface. The other end of the locking plate has a lower protrusion. One side of the metal plate has a limiting groove, and the bottom of the metal plate has a slot.

[0006] Specifically, the mounting part has a sliding groove inside, the locking plate is set in the sliding groove and moves up and down along the sliding groove, the sliding groove has a straight groove hole inside, the upper protrusion passes through the straight groove hole and extends to the outside, and the upper protrusion moves up and down along the straight groove hole.

[0007] Specifically, a reset spring is provided inside the locking plate. One end of the reset spring is mounted on the cylinder of the locking plate, and the other end of the reset spring abuts against the protrusion of the mounting part.

[0008] Specifically, the upper protrusion is locked in a limiting groove on one side of the iron sheet, and the lower protrusion is locked in a slot at the bottom of the iron sheet. A central cylinder is provided in the middle of the mounting part, and the central cylinder passes through the sliding groove of the locking plate.

[0009] Specifically, the rotating disc of the backrest has an installation slot inside, a rotating shaft is provided in the installation slot, a locking plate and a rotating plate are inserted into the rotating shaft, the rotating plate is fastened in the locking plate, the contact surface between the locking plate and the rotating plate has multiple inclined threads, the locking plate is set in the installation slot, and a pressure spring is provided between the rotating disc and the installation slot.

[0010] Specifically, the locking plate has a locking post at one end and an L-shaped sliding surface at the other end. The locking post corresponds to the circular hole on the inner surface of the mounting part, and the sliding surface corresponds to the rotation path of the upper protrusion.

[0011] Specifically, a rotating arm extends outward from one side of the rotating plate, and the rotating arm swings in a slot inside the rotating disk.

[0012] The beneficial effects of this utility model are as follows: when folding the backrest, the rotating disc is used to drive the locking plate to move downward, so that the locking plate is disengaged from the iron plates at both ends of the armrest, the armrest can be flipped freely, and the armrest and backrest can be folded downward at the same time. The folding steps of the stroller can be completed without pressing other buttons, which is extremely convenient and quick. The overall structure is reasonably designed and more flexible. Attached Figure Description

[0013] Appendix Figure 1 This is a perspective view of the present utility model;

[0014] Appendix Figure 2 This is a structural schematic diagram of the seat of this utility model;

[0015] Appendix Figure 3 This is a schematic diagram of the structure of the handrail of this utility model;

[0016] Appendix Figure 4 This is a partially enlarged view of the side of the present invention;

[0017] Appendix Figure 5 This is a partial enlarged view of the backrest of this utility model.

[0018] Instructions and labeling: Backrest 1, Seat 2, Armrest 3, Stroller base 4, Locking plate 5, Rotating plate 6, Locking plate 7; Rotating disc 11, Limiting surface 12, Mounting slot 13, Rotating shaft 14; Mounting part 21, Slide groove 22, Straight groove hole 23, Central cylinder 24, Circular hole 25; Iron sheet 31, Limiting groove 32, Slot 33; Locking post 51, Sliding surface 52; Rotating locking arm 61; Upper protruding post 71, Lower protruding post 72, Return spring 73. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1 to 5 As shown, a folding backrest and armrest structure includes: a backrest, a seat, armrests, and a stroller base. The stroller base has a seat and a backrest. The armrests are connected to the backrest and seat at both ends. Each end of the armrest has a metal plate, which is inserted into the slots of the mounting parts on both sides of the seat. The mounting parts have a locking plate inside. One end of the locking plate has an upper protrusion extending outward to the outer surface of the mounting part. The rotating disc of the backrest is located inside the mounting parts on both sides of the seat. The rotating disc of the backrest has a limiting surface inside, and the upper protrusion moves along the limiting surface. The other end of the locking plate has a lower protrusion. One side of the metal plate has a limiting groove, and the bottom of the metal plate has a slot. The stroller base includes an overall bracket and wheels at the bottom. This structure is a conventional design in the field and will not be described in detail here.

[0021] In the above scheme, the mounting part has a sliding groove inside, and the locking plate is set in the sliding groove and moves up and down along the sliding groove. The sliding groove has a straight slot hole inside, and the upper protrusion passes through the straight slot hole and extends to the outside. The upper protrusion moves up and down along the straight slot hole. The locking plate has a return spring inside, one end of which is installed on the cylinder of the locking plate, and the other end of which abuts against the protrusion of the mounting part. The upper protrusion is locked in a limiting groove on one side of the iron sheet, and the lower protrusion is locked in a slot at the bottom of the iron sheet. The mounting part has a central cylinder in the middle, which passes through the sliding groove of the locking plate. The locking plate engages with the iron sheet by moving up and down.

[0022] Armrest folding principle: When the backrest begins to fold, the rotating disc rotates relative to the rotating disc. The limiting surface inside the rotating disc presses against the upper protrusion of the locking plate. The curved limiting surface pushes the upper protrusion to move, causing the entire locking plate to move downward along the slide groove. At the same time, the upper protrusion disengages from the limiting groove on one side of the iron plate, and the lower protrusion disengages from the U-shaped groove at the bottom of the iron plate, releasing the restriction of the entire iron plate. The iron plate can then rotate freely around the central cylinder, thus achieving the folding of the armrest. Conversely, when it is necessary to unfold the backrest and armrest, simply flip the backrest upward. Under the action of the return spring, the locking plate will be subjected to an upward force, causing the locking plate to move upward. The upper and lower protrusions return to their original positions and lock the armrest.

[0023] In the above scheme, the rotating disk of the backrest has an internal mounting slot. A rotating shaft is located within the mounting slot, and a locking plate and a rotating plate are inserted into the rotating shaft. The rotating plate is fastened into the locking plate. The contact surface between the locking plate and the rotating plate has multiple inclined threads, which are right-angled trapezoids or similar trapezoidal structures, and they cooperate with each other in opposite directions. When the rotating plate rotates, it pushes the locking plate to make a relative lateral displacement. The locking plate is positioned in the mounting slot, and a pressure spring is provided between the rotating disk and the mounting slot. One end of the locking plate has a locking post, and the other end has an L-shaped sliding surface. The locking post corresponds to a circular hole on the inner surface of the mounting part, and the sliding surface corresponds to the rotation path of the upper protrusion. The sliding surface is to provide space for the upper protrusion and avoid mutual interference during rotation. A rotating arm extends outward from one side of the rotating plate. The rotating arm swings within a slot inside the rotating disk. The rotating arm is connected to a button via a steel wire or other components. The button is used to drive the rotating arm to swing at a certain angle, thus rotating the rotating plate.

[0024] Backrest folding linkage: When the backrest needs to be folded, simply press the button to rotate the locking arm, which in turn moves the locking plate outward. The locking pins of the locking plate disengage from the circular holes on the inner surface of the mounting part, thus releasing the restriction on the entire backrest and allowing it to fold downward. Similarly, when the backrest needs to be unfolded, simply fold it upward. Under the action of the pressure spring, the locking pins of the locking plate are inserted into the circular holes on the inner surface of the mounting part to lock the entire backrest. If it needs to be folded backward, press the button again to link the linkage and disengage the locking pins. When folded to the next angle, the locking pins are inserted into the circular holes in another position.

[0025] 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 fold-up backrest and fold-down armrest structure comprising: The backrest, seat, armrest and stroller base are provided with a seat and a backrest, and the armrest is connected to the connecting part of the backrest and the seat, characterized in that: the armrest is provided with an iron sheet at both ends, the iron sheet is inserted into the groove of the mounting part on both sides of the seat, the locking plate is arranged inside the mounting part, the upper protruding column at one end of the locking plate extends outward to the outer surface of the mounting part, the rotating disc of the backrest is arranged inside the mounting part on both sides of the seat, the rotating disc of the backrest is provided with a limiting surface inside, the upper protruding column moves along the limiting surface, the lower protruding column is arranged at the other end of the locking plate, one side surface of the iron sheet is provided with a limiting groove, and a clamping groove is arranged below the bottom of the iron sheet.

2. A fold-up backrest and folding armrest structure according to claim 1 wherein: The mounting part is provided with a sliding groove inside, the locking plate is arranged in the sliding groove and moves up and down along the sliding groove, the sliding groove is provided with a straight slot hole inside, the upper protruding column penetrates through the straight slot hole and extends outside, and the upper protruding column moves up and down along the straight slot hole.

3. A fold-up backrest and folding armrest structure according to claim 2 wherein: The locking plate is provided with a reset spring inside, one end of the reset spring is arranged on the cylinder of the locking plate, and the other end of the reset spring abuts against the protrusion of the mounting part.

4. A folding backrest and folding armrest structure according to claim 1 or claim 3 wherein: The upper protruding column is clamped in the limiting groove on one side surface of the iron sheet, the lower protruding column is clamped in the clamping groove at the bottom of the iron sheet, the center cylinder is arranged in the middle of the mounting part, and the center cylinder penetrates through the sliding groove of the locking plate.

5. A folding backrest and folding armrest structure according to claim 4 wherein: The rotating disc of the backrest is provided with a mounting groove inside, the mounting groove is provided with a rotating shaft, the rotating shaft is arranged with a locking plate and a rotating plate, the rotating plate is buckled in the locking plate, the contact surface between the locking plate and the rotating plate is provided with a plurality of inclined threads, the locking plate is arranged in the mounting groove, and a pressure spring is arranged between the rotating disc and the mounting groove.

6. A folding backrest and folding armrest structure according to claim 5 wherein: One end of the locking plate is provided with a clamping column, the other end of the locking plate is provided with an L-shaped sliding surface, the clamping column corresponds to the circular hole on the inner surface of the mounting part, and the sliding surface corresponds to the rotating path of the upper protruding column.

7. A folding backrest and folding armrest structure according to claim 6 wherein: One side of the rotating plate extends outwardly to a rotating clamping arm, and the rotating clamping arm swings in the groove inside the rotating disc.

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