A pushchair backrest structure

Abstract

The utility model discloses a baby carriage backrest structure, the utility model technical scheme is equipped with the adjustment band and the unlocking band in the same direction of adjusting seat, and adjusting seat is equipped with the limiting mechanism, and the limiting mechanism is removed through pulling the unlocking band, and then the angle of backrest relative to the base is controlled to operating adjustment band, in the actual use process, the operator carries out the quick adjustment to the angle of backrest through pulling the adjustment band and the unlocking band, and the position of adjustment band and the unlocking band can be set in the position of the backrest angle convenient for adjusting, for example the top of backrest but is not limited to this place, and the backrest angle adjustment process is realized only through one -hand operation, and the operation is simple and quick, and the utility model has the beneficial effect of operating efficient.

Description

Technical Field

[0001] This utility model relates to the field of infant and child product technology, and in particular to a stroller backrest structure. Background Technology

[0002] As an essential tool for infants and toddlers' daily travel, the functionality and comfort of strollers have always been the core focus of industry research and development. With the upgrading of modern parenting concepts, parents' demands for strollers have shifted from basic transportation functions to a greater emphasis on ergonomic design, ease of operation, and safety. Among these, the adjustable backrest angle is particularly crucial, directly affecting the infant's sitting and lying comfort, spinal development, and the ease of operation for parents. Statistics show that the global stroller market has been growing year by year, with intelligent features, lightweight construction, and quick adjustment functions becoming the main trends in industry technological iteration.

[0003] Currently, the mainstream stroller backrest angle adjustment technology on the market is the cord-driven adjustment technology. Specifically, a cord is set behind the backrest, and the backrest angle is changed by tightening or releasing the cord. However, the cord-driven adjustment technology has the drawbacks of control complexity and operational redundancy in limiting the cord. When tightening or releasing the cord, the user must first release the limiting mechanism (such as pressing a button or flipping a buckle) before adjusting the cord. The steps are disjointed, which is difficult to coordinate, especially when holding the baby with one hand. In summary, the existing technology has the technical drawback of inefficient operation. Utility Model Content

[0004] The main purpose of this invention is to propose a stroller backrest structure that aims to solve the technical problem of inefficient operation in the existing technology.

[0005] To achieve the above objectives, this utility model proposes a stroller backrest structure, comprising:

[0006] The seat body includes a base and a backrest, the backrest being rotatable relative to the base;

[0007] The adjustment mechanism includes an adjustment seat and an adjustment belt. The adjustment seat is mounted on the back of the backrest and has a limiting mechanism for restricting the movement of the adjustment belt. The adjustment belt extends into the adjustment seat and extends out from the side of the adjustment seat.

[0008] The unlocking belt and the adjusting belt are positioned toward the adjusting seat. When the unlocking belt is pulled in its extension direction, it releases the lock of the limiting mechanism.

[0009] Furthermore, the limiting mechanism includes a locking cavity and a locking member. The locking member is movably disposed in the locking cavity and is fixedly connected to the unlocking band. When the locking member is in the lowest position in the locking cavity, the adjusting band is fixed by the locking member. When the unlocking band is pulled in the extension direction, the locking member disengages from the lowest position, and the fixing of the adjusting band is released.

[0010] Furthermore, the locking element is elliptical and disposed within the lock cavity. When the locking element is located at the bottom of the lock cavity, the adjusting band is locked by the locking element. When the unlocking band is pulled in the insertion direction, the locking element is lifted upward and disengaged from the bottom of the lock cavity, thereby releasing the fixing of the adjusting band.

[0011] Furthermore, the limiting mechanism also includes a reset component, which resets the locking element when the adjustment belt movement ends after unlocking.

[0012] Furthermore, the reset component is a spring, and the locking component has a mounting part for the spring, with one end of the spring located in the mounting part and the other end abutting against the locking cavity.

[0013] Furthermore, an intermediate component serving as a connecting medium is provided between the locking element and the unlocking band.

[0014] Furthermore, the intermediate component is a connecting ring, which is fixed to both sides of the locking component, extends from both sides of the lock cavity, and is arranged around the top of the adjusting seat. The end of the unlocking band is fixedly connected to the joint of the connecting ring.

[0015] Furthermore, the adjusting seat is provided with a passage chamber for the adjustment belt to pass through. The adjustment belt includes a first rope and a second rope that are folded in half and run parallel to each other. At the same time, after the first rope and the second rope are inserted into the passage chamber, they are folded in opposite directions and extend out from both sides of the passage chamber respectively. At least one of the first rope and the second rope is locked in the adjusting seat by a limiting mechanism.

[0016] Furthermore, the contact surfaces of the limiting mechanism with the first and second ropes are provided with a one-way stop structure. The one-way stop structure is used to form a biting interference with the adjusting belt when it moves in the insertion direction before the adjusting belt is unlocked.

[0017] Furthermore, the one-way stop structure is a ratchet, with the ratchet facing the direction in which the adjustment band extends.

[0018] This utility model provides an adjustment belt and an unlocking belt in the same direction as the adjustment seat. The adjustment seat is equipped with a limiting mechanism. By pulling the unlocking belt, the limiting mechanism is released, and then the adjustment belt is operated to control the angle of the backrest relative to the base. In actual use, the operator can quickly adjust the angle of the backrest by pulling the adjustment belt and the unlocking belt. The position of the adjustment belt and the unlocking belt can be set at a convenient location for adjusting the backrest angle, such as the top of the backrest, but is not limited to this location. This backrest angle adjustment process can be achieved by one-handed operation, which is simple and quick. This utility model has the beneficial effect of high efficiency. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 Schematic diagram of the three-dimensional structure of the adjustment mechanism and unlocking band Figure 1 ;

[0021] Figure 3 Schematic diagram of the three-dimensional structure of the adjustment mechanism and unlocking band Figure 2 ;

[0022] Figure 4 This is a three-dimensional structural diagram of the adjustment seat;

[0023] Figure 5 A three-dimensional structural diagram of the locking component and the intermediate component;

[0024] Figure 6 This is a three-dimensional structural diagram of the present invention located in a baby stroller;

[0025] Figure 7 This is a schematic diagram of the planar structure of the present invention located in a baby stroller.

[0026] The above figures include the following reference numerals:

[0027] 1. Seat body; 11. Base; 12. Backrest; 2. Adjustment mechanism; 21. Adjustment seat; 211. Limiting mechanism; 2111. Locking cavity; 2112. Locking element; 21121. Mounting part; 21122. One-way stop structure; 212. Passage chamber; 2121. Pillar; 21211. Panel; 21212. Fold; 22. Adjustment belt; 221. First rope belt; 222. Second rope belt; 223. Adjustment pull ring; 3. Unlocking belt; 4. Unlocking pull ring; 5. Intermediate component; 6. Frame. Detailed Implementation

[0028] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0029] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0031] This utility model proposes a stroller backrest structure.

[0032] In this embodiment of the utility model, such as Figures 1 to 7 As shown, the stroller backrest structure includes a seat body 1, an adjustment mechanism 2, and an unlocking strap 3. The seat body 1 includes a base 11 and a backrest 12, which is rotatably mounted relative to the base 11. The adjustment mechanism 2 includes an adjustment seat 21 and an adjustment strap 22. The adjustment seat 21 is mounted on the back of the backrest 12. The adjustment seat 21 is provided with a limiting mechanism 211 for restricting the movement of the adjustment strap 22. The adjustment strap 22 extends into the adjustment seat 21 and extends out from the side of the adjustment seat 21. The unlocking strap 3 and the adjustment strap 22 are positioned toward the adjustment seat 21. At the same time, when the unlocking strap 3 is pulled in its extending direction, the lock of the limiting mechanism 211 is released.

[0033] In some embodiments of this utility model, the limiting mechanism 211 includes a locking cavity 2111 and a locking member 2112. The locking member 2112 is movably disposed in the locking cavity 2111 and is fixedly connected to the unlocking band 3. When the locking member 2112 is in the lowest position in the locking cavity 2111, the adjusting band 22 is fixed by the locking member 2112. When the unlocking band 3 is pulled in the extension direction, the locking member 2112 disengages from the lowest position, and the fixing of the adjusting band 22 is released.

[0034] It is worth noting that the connection between the aforementioned unlocking band 3 and the adjusting seat 21 is specifically divided into two cases. When the unlocking band 3 is directly connected to the locking member 2112, the unlocking band 3 needs to partially extend into the adjusting seat 21 to connect with the locking member 2112. However, when the unlocking band 3 and the locking member 2112 are indirectly connected through the intermediate member 5, the unlocking band 3 and the adjusting seat 21 themselves do not form a connection relationship. Instead, they are connected to the locking member 2112 in the lock cavity 2111 through the intermediate member 5. Generally speaking, the connection between the locking member 2112 and the unlocking band 3 through the intermediate member 5 will form a more stable connection relationship. This case is described in detail below as a preferred embodiment.

[0035] It is also worth noting that, to improve the tactile feel and facilitate implementation, this invention preferably places the adjustment strap 22 and the unlocking strap 3 in the same direction. During use, pulling the adjustment strap 22 and the unlocking strap 3 allows for adjustment of the backrest angle 12. Furthermore, to enhance intuitiveness and user experience, the adjustment strap 22 and the unlocking strap 3 are preferably positioned in the upward extending direction of the backrest 12. Figure 1 As shown in the content, the adjustment strap 22 and the unlocking strap 3 are arranged diagonally above the seat body 1, that is, at the top of the backrest 12. Of course, it can be understood that the arrangement direction of the adjustment strap 22 and the unlocking strap 3 is not limited to the top of the backrest 12. In some other embodiments of this utility model, the adjustment strap 22 and the unlocking strap 3 can be arranged in the vertical direction of the backrest 12 or on the side of the backrest 12. Since the structure is similar, it will not be described in detail here. Please refer to the aforementioned preferred arrangement example at the top of the backrest 12.

[0036] Specifically, to facilitate understanding of the interaction between the locking cavity 2111 and the locking member 2112, the lowest position of the locking member 2112 in the locking cavity 2111 is described as follows: The movement of the locking member 2112 in the locking cavity 2111 can be summarized into two categories: first, the locking member 2112 performs a lifting movement in the locking cavity 2111; second, the locking member 2112 performs a rotational movement in the locking cavity 2111. In the case of the lifting movement, the lowest position of the locking member 2112 in the locking cavity 2111 is the bottom of the locking cavity 2111. The locking member 2112 performs a cyclic lifting and lowering action in the vertical direction. When the locking member 2112 falls to the bottom of the locking cavity 2111, the locking member 2112 and the bottom of the locking cavity 2111 clamp the adjusting band 22, causing the adjusting band 22 to enter the lock. In a fixed 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 locking cavity 2111, so that the adjustment belt 22 enters a free sliding state, thereby manipulating the adjustment belt 22 to switch the backrest 12 angle; in the case of the second type of rotational activity, the lowest position of the locking member 2112 in the locking cavity 2111 is the lowest point of the rotational position of the locking member 2112. The locking member 2112 can rotate axially within the locking cavity 2111. Specifically, the locking member 2112 locks the adjustment belt 22 by setting a friction or deformation contact surface with the adjustment belt 22, and unlocking is achieved by the rotational movement of the locking member 2112 causing the friction or deformation contact surface to disengage from the adjustment belt 22, so that the adjustment belt 22 enters a free sliding state, thereby manipulating the adjustment belt 22 to switch the backrest 12 angle.

[0037] More specifically, both the aforementioned type I lifting motion and type II rotational motion can achieve the limiting function of the adjusting belt 22. However, the type I lifting motion, based on the clamping of the locking member 2112, further utilizes the frictional contact surface to create a stopping effect on the adjusting belt 22. Compared to the type II rotational motion, the limiting and stopping function of the type I lifting motion is superior. Therefore, the type I lifting motion is shown as a preferred embodiment and further explained in detail. In this embodiment, the locking member 2112 mainly clamps the adjusting belt 22 through interaction with the locking cavity 2111, so that the adjusting belt... 22 enters the locked state. Of course, the locking member 2112 can also be provided with a one-way stop structure 21122 on the side to further restrain the adjusting band 22. This structure will be described in detail later and will not be repeated here. An embodiment of a lifting activity is described as follows: the locking member 2112 is liftably provided in the locking cavity 2111. When the locking member 2112 is located at the bottom of the locking cavity 2111, the adjusting band 22 is locked by the locking member 2112. When the unlocking band 3 is pulled in the extension direction, the locking member 2112 is lifted upward and disengaged from the bottom of the locking cavity 2111, and the fixation of the adjusting band 22 is released.

[0038] Specifically, in order to solve the problem of resetting the locking member 2112 after it is lifted or rotated, the limiting mechanism 211 also 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 economics and installation costs, the reset component is a spring. The following description refers to an embodiment with lifting movement. The locking component 2112 is provided with a mounting part 21121 for engaging the spring. One end of the spring is located in the mounting part 21121, and the other end abuts against the locking cavity 2111. When the locking component 2112 is lifted upward, the spring is compressed to store elastic potential energy. After the unlocking band 3 stops pulling, the locking component 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 mounting part 21121 of the locking component 2112 is located at the top, while in the case of rotation movement, the mounting part 21121 can be located on the side of the locking component 2112. Since the structure is similar, it will not be described in detail here. In some other embodiments of this utility model, the reset component can also be a commonly used industrial reset component with elastic properties such as sponge, rubber, or elastic fiber. This is prior art and will not be described in detail.

[0040] In some preferred embodiments of this utility model, an intermediate member 5 is provided between the locking member 2112 and the unlocking band 3 as a connecting medium. In the working principle of this utility model, the user pulls the unlocking band 3 to make the locking member 2112 move and release the adjusting band 22. Compared with the locking member 2112 and the unlocking band 3 being directly connected, the intermediate member 5 between the locking member 2112 and the unlocking band 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 component 5 is a connecting ring, which is fixed to both sides of the locking component 2112, extends from both sides of the locking cavity 2111, and is arranged around the top of the adjusting seat 21. The end of the unlocking strap 3 is fixedly connected to the joint of the connecting ring. More specifically, in order to meet the safety standards for use of strollers and to simplify industrial production and installation, the fixed connection is understood to be that the end of the unlocking strap 3 is folded onto the connecting ring to form a fixation. This is existing technology and will not be described in detail.

[0042] In some embodiments of this utility model, the adjusting seat 21 is provided with a passage chamber 212 for passing through the adjusting belt 22. The adjusting belt 22 includes a first rope 221 and a second rope 222 that are folded in half and run parallel to each other. At the same time, after the first rope 221 and the second rope 222 are inserted into the passage chamber 212, they are folded in opposite directions and extend out from both sides of the passage chamber 212 respectively. At least one of the first rope 221 and the second rope 222 is locked in the adjusting seat 21 by the limiting mechanism 211.

[0043] Specifically, the aforementioned first rope 221 and second rope 222 extend from the passage chamber 212 by means of reverse folding. In order to match the specific folding method of the first rope 221 and second rope 222, the passage chamber 212 is provided with a plate post 2121 for guiding the first rope 221 and second rope 222 to fold in reverse. After the first rope 221 and second rope 222 extend into the passage chamber 212, they can achieve reverse folding by wrapping around the plate post 2121. The plate post 2121 includes a plate portion 21211 and a folded portion 21212. The first rope 221 and second rope 222 surround the folded portion 21212 to form a reverse fold and are guided to extend out of the passage chamber 212 by the plate portion 21211. In some preferred embodiments of this utility model, the folded portion 21212 is cylindrical to cope with the wear of the first rope 221 and second rope 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 between the limiting mechanism 211 and the first rope 221 and the second rope 222. The one-way stopping structure 21122 is used to form a biting interference with the adjusting belt 22 when it moves in the insertion direction before unlocking. The biting interference can be achieved by mechanical jamming, elastic deformation and magnetic attraction. For ease of understanding, the following embodiment is shown in the form of mechanical jamming.

[0045] More specifically, the one-way stop structure 21122 is a ratchet, which is arranged in the direction of the adjustment belt 22. When the adjustment belt 22 moves, the locking member 2112 enhances the locking and stopping effect by increasing the friction between the ratchet and the adjustment belt 22. In some other embodiments of this utility model, the one-way stop structure 21122 can also be a contact component such as an elastic wedge block or a ceramic friction plate to restrict the movement of the adjustment belt 22. Since the structure is similar, it will not be described in detail here.

[0046] Furthermore, in conjunction with the locking function of the locking member 2112 itself and the one-way stop structure 21122, the shape of the locking member 2112 is constructed to be narrow at the bottom and wide at the top. The narrow-at-the-bottom and wide-at-the-top construction is conducive to the locking function of the locking member 2112 and the bottom of the locking cavity 2111, as well as the contact between the one-way stop structure 21122 and the first rope 221 and the second rope 222, thereby enhancing the locking and stopping effect.

[0047] The following content serves as an explanation of the working principle of this utility model:

[0048] It should be noted beforehand that the adjusting belt 22 and the unlocking belt 3 are made of braided belt by default. Furthermore, the pulling ends of the adjusting belt 22 and the unlocking belt 3 are respectively equipped with adjusting pull rings 223 and unlocking pull rings 4 to facilitate user operation. For specific usage of this utility model, please refer to... Figures 6 to 7 As shown, while the two ends of the adjustment strap 22 are installed on the frame 6, the adjustment seat 21 is installed on the rear of the backrest 12 for use. The installation of the adjustment seat 21 can be achieved by mechanical snap-fit. For example, a slot is set at the rear of the backrest 12, and a snap-fit ​​structure is set at the corresponding part of the adjustment seat 21 to extend into the slot for fixation. This can be adapted according to the objective situation.

[0049] When the backrest angle 12 needs to be adjusted, the adjusting ring 223 and the unlocking ring 4 are pulled to adjust the backrest angle 12. When the unlocking strap 3 is pulled, it pulls on the locking member 2112. Once pulled, the locking member 2112 releases its contact with the adjusting strap 22. After being released, the adjusting strap 22 can then adjust the distance between itself and the frame 6, thereby switching the backrest angle 12. Figure 7The image shows the backrest 12 in a lower position. At this time, the backrest 12 can be raised and the angle switched by controlling the adjustment belt 22 in the direction indicated in the figure.

[0050] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A stroller backrest structure, characterized in that, include: The seat body includes a base and a backrest, the backrest being rotatable 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 and is provided with a limiting mechanism for restricting the movement of the adjustment belt. The adjustment belt extends into the adjustment seat and extends out from the side of the adjustment seat. as well as The unlocking belt and the adjusting belt are positioned toward the adjusting seat. When the unlocking belt is pulled in its extension direction, it releases the lock of the limiting mechanism.

2. The stroller backrest structure as described in claim 1, characterized in that: The limiting mechanism includes a locking cavity and a locking member. The locking member is movably disposed in the locking cavity and is fixedly connected to the unlocking band. When the locking member is in the lowest position in the locking cavity, the adjusting band is fixed by the locking member. When the unlocking band is pulled in the extension direction, the locking member disengages from the lowest position and releases the fixing of the adjusting band.

3. The stroller backrest structure as described in claim 2, characterized in that: The locking element is elliptical and located inside the lock cavity. When the locking element is at the bottom of the lock cavity, the adjusting band is locked by the locking element. When the unlocking band is pulled in the insertion direction, the locking element is lifted up and disengaged from the bottom of the lock cavity, thus releasing the fixing of the adjusting band.

4. The stroller backrest structure as described in claim 2 or 3, characterized in that: The limiting mechanism also includes a reset component, which resets the locking element when the adjustment belt movement ends after unlocking.

5. The stroller backrest structure as described in claim 4, characterized in that: The reset component is a spring, and the locking component has a mounting part for the spring. One end of the spring is located in the mounting part, and the other end abuts against the locking cavity.

6. The stroller backrest structure as described in claim 2 or 3, characterized in that: An intermediate component serving as a connecting medium is provided between the locking element and the unlocking band.

7. The stroller backrest structure as described in claim 6, characterized in that: The middle component is a connecting ring, which is fixed to both sides of the locking component, extends from both sides of the lock cavity, and is set around the top of the adjusting seat. The end of the unlocking band is fixedly connected to the joint of the connecting ring.

8. The stroller backrest structure as described in claim 1, characterized in that: The adjusting seat is provided with a passage chamber for the adjustment belt to pass through. The adjustment belt includes a first rope and a second rope that are folded in half and run parallel to each other. After the first rope and the second rope are inserted into the passage chamber, they are folded in opposite directions and extend out from both sides of the passage chamber, respectively. At least one of the first rope and the second rope is locked in the adjusting seat by a limiting mechanism.

9. The stroller backrest structure as described in claim 8, characterized in that: The contact surfaces of the limiting mechanism with the first and second ropes are provided with a one-way stop structure. The one-way stop structure is used to form a biting interference with the adjusting belt when it moves in the insertion direction before the adjusting belt is unlocked.

10. The stroller backrest structure as described in claim 9, characterized in that: The one-way stop structure is a ratchet, with the ratchet facing the direction in which the adjustment band extends.

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