A shockproof stroller

Abstract

This utility model discloses a shockproof child stroller, including a main frame and a secondary frame. A rotating seat is fixed on the top of the main frame, and a seat is rotatably connected to the top of the rotating seat via a damping bearing. A diagonal brace for supporting the seat is rotatably connected to the surface of the main frame. A push rod is rotatably connected to one end of the top of the secondary frame. The dampers installed at the bottom of the main and secondary frames can actively filter the high-frequency instantaneous impact transmitted from the wheels to the frame. The universal locking wheels adopt a double-layer structure. The inner layer of high-elastic rubber provides basic flexible support, and the air chamber between the outer and inner layers disperses the ground bump force through coordinated deformation, which absorbs low-frequency vibrations more efficiently than traditional single-layer rubber wheels. In addition, the diagonal brace uses an elastic buffer made of glass fiber reinforced nylon, which can not only stably support the high seat, but also further weaken the vibration transmitted to the seat through its own deformation, effectively solving the problem of obvious vibration transmission in traditional strollers.

Description

Technical Field

[0001] This utility model mainly relates to the field of children's stroller technology, specifically a shockproof children's stroller. Background Technology

[0002] A stroller is a means of transportation specifically designed for infants and toddlers. It is mainly used by parents or guardians to take children out. It has functions such as pushing and sitting, and usually has a frame, wheels, seat, backrest and other structures. It can provide a safe and comfortable riding environment for children, while being easy for adults to operate.

[0003] When pushing existing strollers over uneven surfaces such as paving stones or gravel roads, children often experience swaying and crying after sitting for a while. The core problem lies in the insufficient handling of vibration transmission. From the perspective of wheel design, most strollers use single-layer rubber wheels and lack additional cushioning structures. Bumps or depressions on the ground are directly transmitted rigidly to the frame through the wheels and then to the seat, without an effective vibration damping mechanism. From the perspective of the connection between the seat and the frame, some strollers leave a large gap between the bottom of the seat and the frame for the purpose of simplifying the structure or making it easier to store. When bumpy, the seat is prone to swaying up and down or side to side, further amplifying the vibration. Utility Model Content

[0004] This utility model addresses the problem that existing technical solutions are too simplistic by providing a shockproof stroller. It solves the problem mentioned in the background that most existing strollers use single-layer rubber wheels without additional cushioning, allowing ground vibrations to be directly transmitted to the seat through the wheels and frame. Furthermore, some strollers have a large gap between the seat and the frame, which further amplifies the vibrations when the stroller is bumpy.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A shockproof stroller includes a main frame and a secondary frame. A rotating seat is fixed on the top of the main frame, and a seat is rotatably connected to the top of the rotating seat via a damping bearing. A diagonal brace for supporting the seat is rotatably connected to the surface of the main frame, and a push rod is rotatably connected to one end of the top of the secondary frame.

[0006] Furthermore, the main support includes a hinged end for rotatably connecting with the sub-support, and a main support arm extending downward at a 55-60° angle from the hinged end. Symmetrically distributed front universal locking wheels are installed at the bottom of the main support arm. The sub-support includes two sub-support arms that are distributed in an inverted V shape and are each inclined at a 30-35° angle relative to the vertical plane. The rear universal locking wheel is installed at the bottom connection of the two sub-support arms. The main support and the sub-support can move relative to each other to form a folding structure.

[0007] Furthermore, dampers are provided at the corresponding ends of the main bracket and the auxiliary bracket at the bottom for mounting the universal locking wheel. The wheel body of the universal locking wheel has a double-layer structure, with the inner layer being made of highly elastic rubber material and the outer layer and the inner layer forming a sealed air chamber. An air inlet for inflating the air chamber is provided on the surface of the outer wheel body.

[0008] Furthermore, the cabin includes a seat board and a backrest, the backrest being rotatably connected to the seat board, and the connection point between the backrest and the seat board forming a flip structure. The seat board is an arc-shaped board adapted to a child's sitting posture, and the upper surface of the seat board is provided with a detachable enclosing railing to enclose the child's seating area. The backrest is a curved structure that conforms to the curve of a child's back, and a sunshade is rotatably connected to the top of the backrest. At the same time, a through-hole is opened on the surface of the backrest corresponding to the position of the child's spine, and the fabric layer covering the slot has ventilation holes.

[0009] Furthermore, the bottom of the base plate is provided with a base for installation corresponding to the rotating seat. A slot is opened on one side of the outer wall of the base. A spherical self-locking component is fixedly connected in the slot by a spring. The outer wall of the rotating seat is symmetrically opened at 180° along its axis to a limiting slot for engaging with the self-locking component.

[0010] Furthermore, the push rod is a telescopic sleeve structure, and the top of the sub-support is provided with a transition part for rotatably connecting with the push rod. A positioning member is fixed on the top of the transition part. A limiting shaft is fixed on the surface of the push rod near the transition point with the sub-support. The limiting shaft includes a shaft and a spherical structure fixed on the top of the shaft. The positioning member is a non-closed circular structure made of elastic metal material, used to engage with the shaft part of the limiting shaft to limit the rotation of the push rod.

[0011] Furthermore, the diagonal brace includes two support rods and an elastic buffer. One end of each of the two support rods is rotatably connected to the surface of the main support arm of the main bracket. The elastic buffer is distributed along the connection end between the two support rods and abuts against the bottom of the seat plate. The other end of each support rod is rotatably connected to a quick-release bolt near the junction with the main support arm. The main support arm has a threaded hole corresponding to the position of the quick-release bolt for threaded connection with the quick-release bolt.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The dampers installed at the bottom of the main and secondary brackets can actively filter the high-frequency instantaneous impact transmitted from the wheels to the frame. The universal locking wheels adopt a double-layer structure. The inner layer of high-elasticity rubber provides basic flexible support, while the air chamber between the outer and inner layers disperses the ground bump force through coordinated deformation. It absorbs low-frequency vibrations more efficiently than traditional single-layer rubber wheels. In addition, the diagonal brace uses elastic buffers made of glass fiber reinforced nylon, which can not only stably support the high-positioned cabin, but also further weaken the vibration transmitted to the cabin through its own deformation. Through the synergistic effect of multiple shock-absorbing structures, the problem of significant vibration transmission in traditional strollers is effectively solved, making it especially suitable for bumpy road conditions in daily life.

[0013] 2. The main support arm of the main frame has a tilt angle of 55-60°, and the secondary support arm of the secondary frame has an inverted V-shaped distribution with a tilt angle of 30-35°. When unfolded, it forms a stable support structure with a low center of gravity and distributed load. The weight of the child when seated can be naturally stretched and kept stable. When the cabin is unoccupied, it can be folded directly without additional disassembly. At the same time, the cabin adopts an ergonomic design with an arc-shaped seat board and a curved backrest. Combined with the spinal groove and breathable fabric, it can improve the riding comfort. The backrest adjustment, cabin steering, and push rod extension functions are all realized through a unified spherical self-locking structure, which is intuitive and effortless to operate, and takes into account both the stability of use and the convenience of adjustment.

[0014] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the unfolded structure of this utility model; Figure 2 This is a schematic diagram of the folding structure of this utility model; Figure 3 This is a schematic diagram of the rotating seat structure of this utility model; Figure 4 This is a schematic diagram of the distribution structure of the limiting shaft and positioning components of this utility model.

[0016] Numbering on the map: 1. Main support; 2. Sub-support; 3. Cockpit; 301. Seat plate; 302. Backrest plate; 4. Universal locking wheel; 5. Rotary seat; 6. Diagonal brace; 7. Push rod; 8. Limiting shaft; 9. Positioning component. Detailed Implementation

[0017] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0018] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Please refer to the appendix carefully. Figure 1-4 A shockproof stroller includes a main support 1 and a secondary support 2. A rotating seat 5 is fixed on the top of the main support 1. A seat 3 is rotatably connected to the top of the rotating seat 5 via a damping bearing. A diagonal brace 6 for supporting the seat 3 is rotatably connected to the surface of the main support 1. A push rod 7 is rotatably connected to one end of the top of the secondary support 2.

[0020] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the main support 1 includes a hinged end for rotatably connecting with the secondary support 2, and a main support arm extending downward at an angle of 55-60° from the hinged end. At the bottom of the main support arm, symmetrically distributed front universal locking wheels 4 are installed. The secondary support 2 includes two secondary support arms that are distributed in an inverted V shape and are each inclined at 30-35° relative to the vertical plane. At the bottom connection of the two secondary support arms, a rear universal locking wheel 4 is installed. The main support 1 and the secondary support 2 move relative to each other to form a folding structure.

[0021] With the above structure, the main support arm of the main bracket 1 has a tilt angle of 55-60°, and the two auxiliary support arms of the auxiliary bracket 2 are distributed in an inverted V shape with each of them tilted at 30-35° to the vertical plane. When unfolded, it can form a stable support structure with a low center of gravity and distributed load. The weight of the child when sitting down can naturally open the bracket and keep it stable. When the cabin 3 is unoccupied, the main bracket 1 and the auxiliary bracket 2 can be folded by direct relative movement, which is convenient to operate and does not require additional disassembly.

[0022] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, dampers are provided at the corresponding ends of the main bracket 1 and the auxiliary bracket 2 for mounting the universal locking wheel 4. The wheel body of the universal locking wheel 4 has a double-layer structure, with the inner layer being made of high-elasticity rubber material and the outer layer and inner layer forming a sealed air chamber. An air inlet for inflating the air chamber is provided on the surface of the outer wheel body.

[0023] Through the above structure, on the one hand, the dampers added to the bottom mounting ends of the main bracket 1 and the auxiliary bracket 2 can actively buffer the instantaneous impact transmitted from the wheel to the frame, preventing vibration from being directly transmitted to the cabin 3 through the frame. On the other hand, the double-layer structure of the universal locking wheel 4 breaks through the single buffering limitation of traditional single-layer rubber wheels. The inner layer of high-elasticity rubber can provide basic flexible support, and the air pressure in the sealed air chamber between the outer and inner layers ensures the stable support of the wheel to the ground. Moreover, relying on the flexible compression of the inner layer of rubber and the elastic rebound of the outer air chamber, the double-layer structure can more fully disperse the ground bump force than a single-layer rubber wheel. Especially for common paving stone seams and slightly raised road surfaces, it can effectively weaken the transmission of vibration, solving the problems of weak shock absorption capacity and difficulty in balancing support and buffering in existing simple wheel structures.

[0024] In this embodiment, as Figure 1 and Figure 2 As shown, the cabin 3 includes a seat plate 301 and a backrest 302. The backrest 302 is rotatably connected to the seat plate 301. The connection point between the backrest 302 and the seat plate 301 forms a flip structure. The seat plate 301 is an arc-shaped plate adapted to the child's sitting posture. The upper surface of the seat plate 301 is provided with a detachable enclosing railing to enclose the child's sitting area. The backrest 302 is a curved structure that conforms to the curve of the child's back. A sunshade is rotatably connected to the top of the backrest 302. At the same time, a through slot is opened on the surface of the backrest 302 corresponding to the position of the child's spine. The fabric layer covering the slot has ventilation holes.

[0025] Through the above structure, the main body of the seat 301 and backrest 302 is made of glass fiber reinforced PP material. This material is lightweight, high rigidity, and impact-resistant, which can stably support the weight of children and prevent deformation after long-term use. It also meets the environmental and safety standards for children's products. The inner side of the seat 301 and backrest 302 is in contact with the human body, and the outer surface is covered with 20-30mm thick high-density memory foam. It can adapt to the curves of children's bodies through its own resilience, reducing the pressure of sitting. The outer fabric layer is made of combed cotton and polyester fiber blend. This fabric is skin-friendly and soft. At the same time, the ventilation holes distributed in the fabric layer covering the groove of the backrest 302 can accelerate the air circulation of the back and timely expel sweat and stuffy moisture, solving the problem of children's back sweating and stuffiness at the contact point when sitting. Combined with the skin-friendly properties of the fabric itself, it further improves the dryness and comfort of the back contact.

[0026] In this embodiment, as Figure 3 As shown, the bottom of the base plate 301 is provided with a base for installation corresponding to the rotating base 5. A slot is opened on one side of the outer wall of the base. A spherical self-locking component is fixedly connected in the slot by a spring. The outer wall of the rotating base 5 is provided with a limiting slot for engaging with the self-locking component at 180° symmetrically along its axis.

[0027] With the above structure, the 180° symmetrically distributed limiting slots can correspond to the two steering positions commonly used by the cockpit 3, facing the parents and facing forward. The spherical self-locking part and the spring work together, and only external force needs to be applied to make the self-locking part overcome the spring force and disengage from the slot, pushing the cockpit 3 to rotate around the axis of the rotating seat 5. The operation is effortless and intuitive, and after rotating into place, it can automatically lock into the corresponding slot by relying on the spring rebound force to form a stable lock.

[0028] In this embodiment, as Figure 4 As shown, the push rod 7 is a telescopic sleeve structure. The top of the auxiliary support 2 is provided with a transition part for rotatably connecting with the push rod 7. A positioning part 9 is fixed on the top of the transition part. A limiting shaft 8 is fixed on the surface of the push rod 7 near the transition point with the auxiliary support 2. The limiting shaft 8 includes a shaft and a spherical structure fixed on the top of the shaft. The positioning part 9 is a non-closed circular structure made of elastic metal material, which is used to engage with the shaft part of the limiting shaft 8 to limit the rotation of the push rod 7.

[0029] Through the above structure, the inner slide rod and the outer slide rod of the push rod 7 adopt the same self-locking structure as the bottom of the seat plate 301 and the rotating seat 5. This allows for multi-level length adjustment through the engagement of the inner slide rod and the outer slide rod, adapting to the pushing needs of parents of different heights. Furthermore, the consistent self-locking structure makes operation convenient. At the same time, the elastic metal positioning part 9 of the auxiliary bracket 2 and the limiting shaft 8 on the push rod 7 form a reliable rotation limit, which not only achieves stable locking after the push rod 7 rotates, but also enables folding and collapsing.

[0030] In this embodiment, as Figure 1 and Figure 2 As shown, the diagonal brace 6 includes two support rods and an elastic buffer. One end of each of the two support rods is rotatably connected to the surface of the main support arm of the main bracket 1. The elastic buffer is distributed along the connection end between the two support rods and abuts against the bottom of the seat plate 301. The other end of the support rod is rotatably connected to a quick-release bolt near the junction with the main support arm. The main support arm has a threaded hole for threaded connection with the quick-release bolt at the position corresponding to the quick-release bolt.

[0031] With the above structure, current strollers often design the seat high to ensure children's field of vision, resulting in a large support gap between the seat 3 and the frame. If a rigid connection is used, it is easy to directly transmit ground vibration. However, the diagonal brace 6 is fixed by bolt preload, providing reliable support for the high seat plate 301 and preventing the seat from shaking due to the large gap. In addition, the elastic buffer between the two support rods is made of glass fiber reinforced nylon. This material has sufficient rigidity to stably support the weight of the seat plate 301 and the child and prevent support deformation. At the same time, it has excellent elastic deformation ability and can absorb the vibration transmitted from the main support 1 to the seat plate 301 through compression and rebound, breaking the limitation of high field of vision accompanied by strong vibration. At the same time, it does not affect storage and folding.

[0032] The specific operating procedure of this utility is as follows: It should be noted that the adjustment of the backrest 302 and seat 301 of the cockpit 3 adopts the existing multi-position snap-fit ​​adjustment structure of the backrest and is equipped with a self-locking structure. After applying external force to rotate the backrest 302 to the target angle, the self-locking is achieved. This is the existing technology and will not be described in detail.

[0033] The detachable railing on the surface of the seat plate 301 has a split-type plug-in structure. One connector has a spring-loaded spherical self-locking part, and the other connector has a corresponding limiting groove. During installation, the plug is inserted, and the spherical self-locking part is squeezed and locked into the limiting groove under the action of the spring to complete the fixation. During disassembly, the reverse force is applied to compress the self-locking part and release it from the groove. The inner and outer rod telescopic self-locking of the push rod 7 is consistent with the structure of the bottom of the seat plate 301 and the rotating seat 5. The spherical self-locking parts on both sides of the outer wall of the inner slide rod are elastically telescopic by the spring and engage with the limiting grooves evenly distributed on the surface of the outer rod to realize the multi-position locking of the extension length of the push rod 7 to adapt to the pushing needs of parents of different heights.

[0034] First, when in use, rotate the push rod 7 upwards to unfold it. The limiting shaft 8 rotates with the push rod 7. Since the positioning part 9 is made of elastic metal, it has the elasticity to deform slightly. When the circular shaft of the limiting shaft 8 contacts the opening of the positioning part 9, the non-closed circular structure of the positioning part 9 will be slightly opened by the pushing force. After the shaft is fully inserted, the positioning part 9 returns to its original position by its own elasticity, locking the shaft part of the limiting shaft 8 and completing the limiting fixation after the push rod 7 rotates.

[0035] Rotate the two support rods of the diagonal brace 6 so that the elastic buffer made of glass fiber reinforced nylon abuts against the bottom of the seat plate 301. Then rotate the quick-release bolts on one side of the outer wall of the two support rods so that the bolt heads are tightly threaded into the threaded holes on the surface of the main support arm. Fix the diagonal brace 6 by the preload of the bolts so that it stably supports the cabin 3. Use the deformation characteristics of the elastic buffer to reduce the vibration transmitted to the cabin 3 during the push.

[0036] Unlike traditional single-layer rubber wheels, this universal locking wheel 4 adopts a double-layer structure. The inner layer of high-elasticity rubber provides basic cushioning, while the air pressure in the air chamber between the outer and inner layers can be adjusted through the air inlet. In conjunction with the dampers at the corresponding ends of the main bracket 1 and the auxiliary bracket 2, it can further absorb the impact from ground bumps. To check whether the air pressure in the air chamber is normal, observe the fit between the two sides of the wheel and the preset limiting surface of the wheel mounting frame. When both sides of the wheel fit evenly against the limiting surface, it indicates that the air pressure between the inner and outer layers is balanced. If there is a gap that is too large on one side or the fit is too tight, the air pressure needs to be adjusted through the air inlet.

[0037] In actual use, parents can first adjust the extension length of push rod 7 according to their own height by engaging the spherical self-locking part of the inner and outer rods with the limiting slot. Rotating push rod 7 upwards causes the limiting shaft 8 to engage with the elastic metal positioning part 9 to complete the limiting. During the push, the double-layer structure of the universal locking wheel 4 and the damper work together to reduce the transmission of ground vibration. The elastic buffer of the diagonal brace 6 simultaneously buffers the vibration of the cabin 3, ensuring the comfort of the child. The steering adjustment of the cabin 3 is achieved through the cooperation of its bottom base and the rotating seat 5. When steering is required, external force is applied to push the cabin 3, causing the spherical self-locking part to overcome the spring force and disengage from the current limiting slot. At this time, the cabin 3 can rotate around the axis of the rotating seat 5 through the damping bearing at the top of the rotating seat 5. When it rotates to a 180° symmetrical position, the spherical self-locking part engages with the limiting slot on the other side of the rotating seat 5 under the action of the spring rebound force, completing the steering positioning.

[0038] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A shockproof stroller for children, comprising a main support (1) and a secondary support (2), characterized in that: A rotating seat (5) is fixed above the main support (1). A cabin (3) is rotatably connected to the top of the rotating seat (5) via a damping bearing. A diagonal brace (6) for supporting the cabin (3) is rotatably connected to the surface of the main support (1). A push rod (7) is rotatably connected to one end of the top of the auxiliary support (2).

2. The shockproof stroller according to claim 1, characterized in that: The main support (1) includes a hinged end for rotatably connecting with the sub-support (2), and a main support arm extending downward at an angle of 55-60° from the hinged end. At the bottom of the main support arm, symmetrically distributed front universal locking wheels (4) are installed. The sub-support (2) includes two sub-support arms that are distributed in an inverted V shape and are each inclined at 30-35° relative to the vertical plane. At the bottom connection of the two sub-support arms, the rear universal locking wheels (4) are installed. The main support (1) and the sub-support (2) move relative to each other to form a folding structure.

3. The shockproof stroller according to claim 2, characterized in that: The bottom of the main bracket (1) and the auxiliary bracket (2) are equipped with dampers at the corresponding ends for mounting the universal locking wheel (4). The wheel body of the universal locking wheel (4) has a double-layer structure with an inner layer made of high elastic rubber material. The outer layer and the inner layer are enclosed to form a sealed air chamber. An air inlet for inflating the air chamber is opened on the surface of the outer wheel body.

4. The shockproof stroller according to claim 1, characterized in that: The cabin (3) includes a seat plate (301) and a backrest (302). The backrest (302) is rotatably connected to the seat plate (301). The connection point between the backrest (302) and the seat plate (301) forms a flip structure. The seat plate (301) is an arc-shaped plate adapted to the child's sitting posture. The upper surface of the seat plate (301) is provided with a detachable enclosing railing to enclose the child's sitting area. The backrest (302) is a curved structure that conforms to the curve of the child's back. A sunshade is rotatably connected to the top of the backrest (302). At the same time, a through slot is opened on the surface of the backrest (302) corresponding to the position of the child's spine. The fabric layer covering the slot has ventilation holes.

5. A shockproof stroller according to claim 4, characterized in that: The bottom of the base plate (301) is provided with a base for installation corresponding to the rotating seat (5). A slot is opened on one side of the outer wall of the base. A spherical self-locking component is fixedly connected in the slot by a spring. The outer wall of the rotating seat (5) is symmetrically opened at 180° along its axis to a limiting slot for engaging with the self-locking component.

6. A shockproof stroller according to claim 1, characterized in that: The push rod (7) is a telescopic sleeve structure. The top of the auxiliary support (2) is provided with a transition part for rotating connection with the push rod (7). The top of the transition part is fixed with a positioning part (9). A limiting shaft (8) is fixed on the surface of the push rod (7) near the transition point with the auxiliary support (2). The limiting shaft (8) includes a shaft and a spherical structure fixed on the top of the shaft. The positioning part (9) is a non-closed circular structure made of elastic metal material, used to engage with the shaft part of the limiting shaft (8) to limit the rotation of the push rod (7).

7. A shockproof stroller according to claim 4, characterized in that: The diagonal brace (6) includes two support rods and an elastic buffer. One end of each of the two support rods is rotatably connected to the surface of the main support arm of the main bracket (1). The elastic buffer is distributed along the connection end between the two support rods and abuts against the bottom of the seat plate (301). The other end of the support rod is rotatably connected to a quick-release bolt near the junction with the main support arm. The main support arm has a threaded hole for threaded connection with the quick-release bolt at the position corresponding to the quick-release bolt.

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