Baby carriage backrest structure

Abstract

According to the technical scheme, an adjusting belt and an unlocking belt are arranged in the same direction of an adjusting seat, the adjusting seat is provided with a limiting mechanism, the limiting mechanism is released by pulling the unlocking belt, and then the adjusting belt is operated to control the angle of a backrest relative to a base. An operator can rapidly adjust the angle of the backrest by pulling the adjusting belt and the unlocking belt, the positions of the adjusting belt and the unlocking belt can be arranged at the positions where the angle of the backrest can be conveniently adjusted, such as the top of the backrest but not limited to the positions, the backrest angle adjusting process is achieved only through one-hand operation, operation is easy and rapid, and practicability is high. The method has the beneficial effect of being efficient in operation.

Description

Technical Field

[0001] The present invention relates to the technical field of baby products, and particularly to a backrest structure of a baby stroller. Background Art

[0002] As an important tool for infants' daily travel, the functionality and comfort of baby strollers have always been the core directions of industry research and development. With the upgrade of modern parenting concepts, parents' demands for baby strollers have shifted from basic transportation functions to a greater emphasis on ergonomic design, operational convenience, and safety. Among them, the adjustable function of the backrest angle of baby strollers is particularly crucial, directly affecting the sitting and lying comfort of infants, spinal development, and the convenience of parents' operation. According to statistics, the global market size of baby strollers has been increasing year by year, and intelligentization, lightweight, and rapid adjustment functions have become the main trends in industry technology iteration.

[0003] Currently, the mainstream backrest angle adjustment technology in the market is the cord traction adjustment technology. Specifically, cords are arranged behind the backrest, and the cords are individually tightened or the cord lengths are released to change the backrest angle. However, the cord traction adjustment technology has defects in the limitation of the cords, including control complexity and operational redundancy. When operating the tightening and release of the cords, users need to first release the limiting mechanism (such as pressing a button or toggling a buckle, etc.) and then adjust the cords. The steps are disjointed, especially when holding the baby with one hand, it is difficult to coordinate the operation. In summary, the existing technology has the technical defect of low operation efficiency. Summary of the Invention

[0004] The main purpose of the present invention is to propose a backrest structure of a baby stroller, aiming to solve the technical problem of low operation efficiency in the existing technology.

[0005] To achieve the above object, the present invention proposes a backrest structure of a baby stroller, including:

[0006] A seat body, which includes a base and a backrest, and the backrest is rotatably arranged relative to the base;

[0007] An adjustment mechanism, which includes an adjustment seat and an adjustment belt. The adjustment seat is installed on the back of the backrest. The adjustment seat is provided with a limiting mechanism for restricting the movement of the adjustment belt and a passage chamber for passing the adjustment belt. The limiting mechanism includes a locking chamber, and the adjustment belt extends into the locking chamber and then extends out from the side of the passage chamber; and

[0008] An unlocking belt, which is arranged towards the adjustment seat together with the adjustment belt. At the same time, when the unlocking belt is pulled in its extension direction, the locking of the limiting mechanism is released.

[0009] Further, the limiting mechanism further includes a locking member, which is movably arranged in the locking cavity and fixedly connected to the unlocking belt. When the locking member is in the lowest position in the locking cavity, the adjusting belt is fixed by the locking member. When the unlocking belt is pulled in the extending direction, the locking member disengages from the lowest position, and the fixation of the adjusting belt is released.

[0010] Further, the locking member is liftably arranged in the locking cavity. When the locking member is located at the bottom of the locking cavity, the adjusting belt is locked by the locking member. When the unlocking belt is pulled in the extending direction, the locking member lifts upward and disengages from the bottom of the locking cavity, and the fixation of the adjusting belt is released.

[0011] Further, the limiting mechanism further includes a reset component, which resets the locking member when the movement of the adjusting belt ends after unlocking.

[0012] Further, the reset component is a spring. The locking member is provided with a mounting portion for docking the spring. One end of the spring is arranged in the mounting portion, and the other end abuts against the locking cavity.

[0013] Further, an intermediate member as a connection medium is arranged between the locking member and the unlocking belt.

[0014] Further, the intermediate member is a connecting ring, which is fixed to both sides of the locking member, extends out from both sides of the locking cavity, and is simultaneously arranged around the upper part of the adjusting seat. The end of the unlocking belt is fixedly connected to the joint of the connecting ring.

[0015] Further, the adjusting belt includes a first cord and a second cord that are parallel after being folded in half. At the same time, the first cord and the second cord are folded back in opposite directions after entering the extending passage chamber and respectively extend out from both sides of the passage chamber. At least one of the first cord and the second cord is locked by the limiting mechanism on the adjusting seat.

[0016] Further, a one-way stopping structure is arranged on the contact surface between the limiting mechanism and the first cord and the second cord. The one-way stopping structure is used to form an interlocking interference with the adjusting belt when the adjusting belt moves in the extending direction before unlocking.

[0017] Further, the one-way stopping structure is a ratchet tooth, which is arranged towards the extending direction of the adjusting belt.

[0018] In the technical solution of the present invention, an adjusting belt and an unlocking belt are arranged on the adjusting seat, and a limiting mechanism is arranged on the adjusting seat. By pulling the unlocking belt to release the limiting mechanism, and then operating the adjusting belt to control the angle of the backrest relative to the base. In the actual use process, the operator quickly adjusts the angle of the backrest by pulling the adjusting belt and the unlocking belt. The positions of the adjusting belt and the unlocking belt can be set at positions convenient for adjusting the backrest angle, such as the top of the backrest but not limited to this. The adjustment process of the backrest angle is realized only by one-handed operation, which is simple and fast. The present invention has the beneficial effect of high operation efficiency. Description of the Drawings

[0019] Figure 1 Schematic three - dimensional structure diagram of the present invention;

[0020] Figure 2 Schematic three - dimensional structure of the adjusting mechanism and the unlocking belt Figure 1 ;

[0021] Figure 3 Schematic three - dimensional structure of the adjusting mechanism and the unlocking belt Figure 2 ;

[0022] Figure 4 Schematic three - dimensional structure diagram of the adjusting seat;

[0023] Figure 5 Schematic three - dimensional structure diagram of the locking member and the intermediate member;

[0024] Figure 6 Schematic three - dimensional structure diagram of the present invention located on the stroller;

[0025] Figure 7 Schematic plan structure diagram of the present invention located on the stroller.

[0026] Among them, the above - mentioned drawings include the following reference numerals:

[0027] 1, seat body; 11, base; 12, backrest; 2, adjusting mechanism; 21, adjusting seat; 211, limiting mechanism; 2111, locking cavity; 2112, locking member; 21121, mounting portion; 21122, one - way stop structure; 212, passage chamber; 2121, sheet column; 21211, sheet portion; 21212, folding portion; 22, adjusting belt; 221, first cord; 222, second cord; 223, adjusting pull ring; 3, unlocking belt; 4, unlocking pull ring; 5, intermediate member; 6, frame. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0029] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...) involved in the embodiments of the present invention, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0030] In addition, if there is a description involving "first" or "second" in the embodiments of the present invention, such descriptions of "first" or "second" are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The present invention provides a backrest structure for a baby stroller.

[0032] In the embodiments of the present invention, as Figures 1 to 7 shown, the backrest structure of the baby stroller includes a seat body 1, an adjustment mechanism 2, and an unlocking belt 3. Among them, the seat body 1 includes a base 11 and a backrest 12, and the backrest 12 is rotatably arranged relative to the base 11. The adjustment mechanism 2 includes an adjustment seat 21 and an adjustment belt 22. The adjustment seat 21 is installed on the back of the backrest 12. The adjustment seat 21 is provided with a passage chamber 212 for passing through the adjustment belt 22 and a limiting mechanism 211 for restricting the movement of the adjustment belt 22. The limiting mechanism 211 includes a locking chamber 2111. After the adjustment belt 22 extends into the locking chamber 2111, it extends out from the side of the passage chamber 212. The unlocking belt 3 and the adjustment belt 22 are arranged towards the adjustment seat 21. At the same time, when the unlocking belt 3 is pulled in its extension direction, the locking of the limiting mechanism 211 is released.

[0033] In some embodiments of the present invention, the limiting mechanism 211 further includes a locking member 2112. The locking member 2112 is movably arranged in the locking chamber 2111 and is fixedly connected to the unlocking belt 3. When the locking member 2112 is in the lowest position in the locking chamber 2111, the adjustment belt 22 is fixed by the locking member 2112. When the unlocking belt 3 is pulled in the extending direction, the locking member 2112 disengages from the lowest position, and the fixing of the adjustment belt 22 is released.

[0034] It should be noted that the connection relationship between the aforementioned unlocking belt 3 and the adjustment seat 21 is specifically divided into two cases. When the unlocking belt 3 is directly connected to the locking member 2112, the unlocking belt 3 needs to partially extend into the adjustment seat 21 for connection with the locking member 2112. When the unlocking belt 3 is indirectly connected to the locking member 2112 through an intermediate member 5, the unlocking belt 3 does not form a connection relationship with the adjustment seat 21 itself, but is connected to the locking member 2112 in the locking chamber 2111 through the intermediate member 5. Generally speaking, the connection between the locking member 2112 and the unlocking belt 3 through the intermediate member 5 will form a more stable connection relationship. This case is described in detail as a preferred embodiment later.

[0035] It is also worth noting that, in order to conform to the operating feel and facilitate specific implementation, the present invention preferably arranges the adjustment belt 22 and the unlocking belt 3 in the same direction. When in use, pulling the adjustment belt 22 and the unlocking belt 3 can complete the adjustment action of the angle of the backrest 12. In addition, in order to be more intuitive and habitual in use, the specific direction of the adjustment belt 22 and the unlocking belt 3 is the extending direction of the backrest 12 upwards. As shown in the content of Figure 1 , the adjustment belt 22 and the unlocking belt 3 are arranged obliquely above the seat body 1, that is, at the top of the backrest 12. Of course, it can be understood that the setting direction of the adjustment belt 22 and the unlocking belt 3 is not limited to the top of the backrest 12. In some other embodiments of the present invention, the adjustment belt 22 and the unlocking belt 3 can be arranged in the vertical direction of the backrest 12 or on the side of the backrest 12. Since the structures are similar, they will not be elaborated here. Refer to the preferred setting example at the top of the backrest 12 mentioned above.

[0036] Specifically, in order to facilitate the understanding of the interaction relationship between the lock cavity 2111 and the locking member 2112, the following specific description is made for the lowest position of the locking member 2112 in the lock cavity 2111: The activities of the locking member 2112 in the lock cavity 2111 can be summarized into two categories. One is the lifting activity of the locking member 2112 in the lock cavity 2111, and the other is the rotational activity of the locking member 2112 in the lock cavity 2111. In the case of the first type of lifting activity, the lowest position of the locking member 2112 in the lock cavity 2111 is the bottom of the lock cavity 2111. The locking member 2112 performs cyclic lifting and falling actions in the vertical direction. When the locking member 2112 falls to the bottom of the lock cavity 2111, the locking member 2112 and the bottom of the lock cavity 2111 clamp the adjustment belt 22 together, making the adjustment belt 22 enter the locked state. When it is necessary to unlock the adjustment belt 22, the locking member 2112 is lifted upwards to disengage from the adjustment belt 22 and move away from the bottom of the lock cavity 2111 to make the adjustment belt 22 enter the free sliding state, so as to manipulate the adjustment belt 22 to switch the angle of the backrest 12. In the case of the second type of rotational activity, the lowest position of the locking member 2112 in the lock cavity 2111 is the lowest point of the rotational position of the locking member 2112. The locking member 2112 can perform axial rotation in the lock cavity 2111. The locking member 2112 specifically locks the adjustment belt 22 by setting a friction or deformable contact surface with the adjustment belt 22, and unlocking is achieved by the rotational movement of the locking member 2112 to separate the friction or deformable contact surface from the adjustment belt 22 to make the adjustment belt 22 enter the free sliding state, so as to manipulate the adjustment belt 22 to switch the angle of the backrest 12.

[0037] More specifically, the above-mentioned cases of the first type of lifting movement and the second type of rotational movement can both achieve the limiting function of the adjusting belt 22. However, the first type of lifting movement can, on the basis of being pressed by the locking member 2112, further utilize the friction contact surface to form a stopping effect on the adjusting belt 22. Compared with the second type of rotational movement, the limiting and stopping function of the first type of lifting movement is more excellent. Therefore, the case of the first type of lifting movement is shown as a preferred embodiment and further described in detail. In this embodiment, the locking member 2112 mainly clamps the adjusting belt 22 through interaction with the locking cavity 2111, making the adjusting belt 22 enter the locked state. Of course, the locking member 2112 can also be provided with a one-way stopping structure 21122 on the side to further restrict the adjusting belt 22. This structure will be described in detail later and will not be elaborated here. The description of the first type of lifting movement embodiment is as follows. The locking member 2112 is liftably arranged in the locking cavity 2111. When the locking member 2112 is located at the bottom of the locking cavity 2111, the adjusting belt 22 is locked by the locking member 2112. When the unlocking belt 3 is pulled in the extending direction, the locking member 2112 is lifted upward and disengaged from the bottom of the locking cavity 2111, and the fixation of the adjusting belt 22 is released.

[0038] Specifically, to solve the problem of the reset of the locking member 2112 after lifting or rotating, the limiting mechanism 211 further includes a reset component (not shown). When the movement of the adjusting belt 22 ends after unlocking, the reset component resets the locking member 2112.

[0039] More specifically, from the perspective of economy and installation cost, the reset component is a spring. The following content is described with reference to the embodiment of the lifting movement. The locking member 2112 is provided with an installation portion 21121 for docking the spring. One end of the spring is arranged in the installation portion 21121, and the other end abuts against the locking cavity 2111. When the locking member 2112 is lifted upward, the spring is compressed to store elastic potential energy. After the unlocking belt 3 stops being pulled, the locking member 2112 is pushed back to the bottom of the locking cavity 2111 by the spring. It can be understood that in the case of the aforementioned lifting movement, the installation portion 21121 of the locking member 2112 is arranged above, while in the case of the rotational movement, the installation portion 21121 can be arranged on the side of the locking member 2112. Since the structures are similar, they will not be elaborated here. In some other embodiments of the present invention, the reset component can also be a commonly used industrial reset component with elastic properties such as sponge, rubber, elastic fiber, etc. This is prior art and will not be elaborated.

[0040] In some preferred embodiments of the present invention, an intermediate member 5 serving as a connection medium is provided between the locking member 2112 and the unlocking belt 3. In the working principle process of the present invention, the user pulls the unlocking belt 3 to cause the locking member 2112 to move, thereby releasing the adjustment belt 22. Compared with the direct connection between the locking member 2112 and the unlocking belt 3, setting the intermediate member 5 between the locking member 2112 and the unlocking belt 3 can form a stable connection relationship, which is beneficial to forming a stable traction effect during the movement of the locking member 2112.

[0041] Specifically, the intermediate member 5 is a connecting ring, which is fixed to both sides of the locking member 2112, extends out from both sides of the lock cavity 2111, and is simultaneously disposed above the adjustment seat 21. The end of the unlocking belt 3 is fixedly connected to the joint of the connecting ring. More specifically, to meet the safety use standards of the stroller and simplify industrial production and installation, the fixed connection is understood as folding the end of the unlocking belt 3 on the connecting ring to form a fixation, which is prior art and will not be elaborated here.

[0042] In some embodiments of the present invention, the adjustment belt 22 includes a first cord 221 and a second cord 222 that are parallel after being folded in half. At the same time, the first cord 221 and the second cord 222 are folded back in opposite directions after entering the passage chamber 212 and extend out from both sides of the passage chamber 212 respectively. At least one of the first cord 221 and the second cord 222 is locked by the limiting mechanism 211 on the adjustment seat 21.

[0043] Specifically, the foregoing first cord 221 and second cord 222 extend out of the passage chamber 212 in a manner of being folded back in opposite directions. In order to cooperate with the specific folding method of the first cord 221 and the second cord 222, a sheet column 2121 for guiding the first cord 221 and the second cord 222 to be folded back in opposite directions is provided in the passage chamber 212. After the first cord 221 and the second cord 222 enter the passage chamber 212, they can be folded back in opposite directions by winding around the sheet column 2121. The sheet column 2121 includes a sheet portion 21211 and a folding portion 21212. The first cord 221 and the second cord 222 are wound around the folding portion 21212 to form a reverse fold, and are guided to extend out of the passage chamber 212 through the sheet portion 21211. In some preferred embodiments of the present invention, the folding portion 21212 is provided as a cylinder to cope with the wear of the first cord 221 and the second cord 222 and enhance the service life of the product.

[0044] Specifically, in order to enhance the locking and stopping effect of the limiting mechanism 211 on the adjusting belt 22, a one-way stopping structure 21122 is provided on the contact surface of the limiting mechanism 211 with the first cord 221 and the second cord 222. The one-way stopping structure 21122 is used to form a biting interference with the adjusting belt 22 when the adjusting belt 22 moves in the inserting direction before unlocking. The biting interference can be specifically realized by mechanical blocking, elastic deformation, magnetic attraction, etc. For the convenience of understanding, the following will show the embodiments in the form of mechanical blocking.

[0045] More specifically, the one-way stopping structure 21122 is a ratchet tooth, and the ratchet tooth is arranged in the inserting direction of the adjusting belt 22. When the adjusting belt 22 moves, the locking member 2112 increases the frictional force in contact with the adjusting belt 22 through the ratchet tooth to enhance the locking and stopping effect. In some other embodiments of the present invention, the one-way stopping structure 21122 can also be a contact type component such as an elastic wedge block or a ceramic friction plate to limit the movement of the adjusting belt 22. Since the structures are similar, they will not be elaborated here.

[0046] Furthermore, in cooperation with the locking function of the locking member 2112 itself and the one-way stopping structure 21122, the outer shape of the locking member 2112 is constructed to be narrower at the bottom and wider at the top. The structure of being narrower at the bottom and wider at the top is beneficial to the locking effect between the locking member 2112 and the bottom of the locking cavity 2111 and the contact between the one-way stopping structure 21122 and the first cord 221 and the second cord 222, enhancing the locking and stopping effect.

[0047] The following content is the working principle description of the present invention:

[0048] It should be noted in advance that the adjusting belt 22 and the unlocking belt 3 are default to use woven belts. At the same time, adjusting pull rings 223 and unlocking pull rings 4 are respectively provided at the pulling ends of the adjusting belt 22 and the unlocking belt 3 to facilitate the operation of the user. For the specific use of the present invention, please refer to Figures 6 to 7 the content shown. While installing the two ends of the adjusting belt 22 on the vehicle frame 6, the adjusting seat 21 is installed at the rear of the backrest 12 for use. The installation of the adjusting seat 21 can be achieved by mechanical clamping. For example, a slot is provided at the rear of the backrest 12, and a clamping structure is provided at the corresponding part of the adjusting seat 21 to extend into the slot for fixation. It can be adaptively set according to the objective situation here.

[0049] When it is necessary to adjust the angle of the backrest 12, pull the adjusting pull ring 223 and the unlocking pull ring 4 to adjust the angle of the backrest 12. After the unlocking belt 3 is pulled, it forms a traction on the locking member 2112. After the locking member 2112 is pulled, the contact with the adjusting belt 22 is released. After the adjusting belt 22 is released, the distance between the adjusting belt 22 and the vehicle frame 6 can be adjusted, thereby switching the angle of the backrest 12, as Figure 7The content shown is what the backrest 12 looks like when in the lower position. At this time, the backrest 12 can be lifted and the angle can be switched in the direction marked in the figure by controlling the adjustment strap 22.

[0050] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A backrest structure of a baby carriage, characterized in that, include: A seat body, the seat body comprising a base and a backrest, the backrest being rotatably arranged relative to the base; The adjustment mechanism includes an adjustment seat and an adjustment belt. The adjustment seat is installed on the back of the backrest. The adjustment seat is provided with a limit mechanism for limiting the movement of the adjustment belt and a passage chamber for passing the adjustment belt. The limit mechanism includes a lock chamber. After the adjustment belt is inserted into the lock chamber, it extends out from the side of the passage chamber; and The unlocking belt and the adjusting belt are arranged toward the adjusting seat. At the same time, when the unlocking belt is pulled in the extension direction thereof, the locking of the limiting mechanism is released.

2. The baby carriage backrest structure according to claim 1, wherein: The limiting mechanism also includes a locking piece, which is movably arranged in the lock cavity and is fixedly connected to the unlocking belt. When the locking piece is in the lowest position in the lock cavity, the adjusting belt is fixed by the locking piece. When the unlocking belt is pulled in the extending direction, the locking piece is disengaged from the lowest position, and the fixation of the adjusting belt is released.

3. The stroller backrest structure according to claim 2, wherein: The locking piece is lifted and arranged in the lock cavity. When the locking piece is located at the bottom of the lock cavity, the adjusting belt is locked by the locking piece. When the unlocking belt is pulled in the extending direction, the locking piece is lifted upward and separated from the bottom of the lock cavity, thereby releasing the fixation of the adjusting belt.

4. The stroller backrest structure according to claim 2 or 3, characterized in that: The limiting mechanism also includes a reset component, which resets the locking member when the adjustment belt finishes moving after being unlocked.

5. The baby stroller backrest structure according to claim 4, wherein: The reset component is a spring, and the locking piece is provided with a mounting portion for docking the spring. One end of the spring is arranged on the mounting portion, and the other end abuts against the lock cavity.

6. The stroller backrest structure according to claim 2 or 3, characterized in that: An intermediate piece as a connecting medium is provided between the locking piece and the unlocking strip.

7. The baby stroller backrest structure according to claim 6, characterized in that: The middle piece is a connecting ring, which is fixed on both sides of the locking piece, extends from both sides of the lock cavity, and is arranged around the top of the adjustment seat. The end of the unlocking belt is fixedly connected to the joint of the connecting ring.

8. The baby stroller backrest structure according to claim 1, characterized in that: The adjustment belt includes a first rope and a second rope that are folded in parallel. At the same time, the first rope and the second rope are folded in reverse after extending into the passage chamber and extend from both sides of the passage chamber respectively. At least one of the first rope and the second rope is locked by a limiting mechanism on the adjustment seat.

9. The stroller backrest structure according to claim 8, characterized in that: A one-way stop structure is provided on the contact surface between the limiting mechanism and the first and second rope straps. The one-way stop structure is used to form a bite interference with the adjustment strap when the adjustment strap moves toward the extending direction before being unlocked.

10. The baby stroller backrest structure according to claim 9, wherein: The one-way stopping structure is a ratchet, and the ratchet is arranged toward the extending direction of the adjusting belt.

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