Baby carriage and seat height adjusting mechanism thereof

Abstract

The invention discloses a seat height adjusting mechanism which comprises a locking rod and a locking piece, the locking rod is arranged in a frame and is provided with a plurality of locking holes arranged at intervals, a blocking part is further arranged in each locking hole in a protruding mode, the locking piece is installed on a seat and is provided with a clamping end, the clamping end is used for being detachably clamped in any locking hole, and the locking piece is connected with the locking rod. The clamping end is provided with a clamping hook in a protruding mode, the protruding direction of the clamping hook is staggered with the moving direction of the clamping end separated from the locking hole, and the clamping hook abuts against the blocking part in a separable mode. After the clamping end is clamped into the locking hole, the blocking part abuts against the clamping hook to prevent the clamping end from being separated from the locking hole, so that even if the locking piece is accidentally operated, pivoting unlocking cannot be achieved, unnecessary sliding-down of the seat caused by misoperation can be avoided, the stability and safety of seat connection are guaranteed, and the riding safety of infants is further guaranteed. The invention further discloses a baby carriage with the seat height adjusting mechanism.

Description

[0001] This application is a divisional application of Chinese Invention Patent No. 202010598976.9, filed on June 28, 2020, entitled “Stroller and Seat Height Adjustment Mechanism Thereof”. Technical Field

[0002] This invention relates to the field of infant and toddler vehicle technology, and in particular to a stroller and its seat height adjustment mechanism that can prevent accidental adjustment of the seat height. Background Technology

[0003] Infant and toddler vehicles (such as strollers and car seats) are widely used in families with infants and toddlers. Among them, strollers provide great convenience for infants and toddlers' outdoor activities. Strollers not only reduce the burden on adults carrying infants and toddlers, but also have the advantages of making infants and toddlers comfortable and safe to ride.

[0004] Strollers typically consist of a frame, wheels, and a seat mounted on the frame. The frame is usually foldable, and some seats are adjustable to ensure the comfort of infants and toddlers, and also height-adjustable to accommodate adults of different heights. After the seat's angle or height is adjusted, it needs to be locked using a locking mechanism to ensure the stability of the seat connection and safety. However, existing locking mechanisms lack anti-accidental operation mechanisms. Therefore, if the locking mechanism is accidentally activated and released, the seat may slide down the frame under its own weight, posing an unnecessary danger.

[0005] Therefore, it is necessary to provide a seat height adjustment mechanism and stroller that can prevent accidental operation in order to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a seat height adjustment mechanism that can prevent accidental operation.

[0007] Another object of the present invention is to provide a stroller that can prevent the seat height adjustment mechanism from being accidentally operated.

[0008] To achieve the above objectives, the technical solution of the present invention is as follows: a seat height adjustment mechanism is provided for adjusting the height of the seat on the vehicle frame. The mechanism includes a locking rod and a locking member. The locking rod is disposed in the vehicle frame and has a plurality of locking holes spaced apart. Each locking hole also has a blocking part protruding therefrom. The locking member is installed on the seat and has a locking end. The locking end is used to detachably engage with any of the locking holes, and the locking end has a hook protruding therefrom. The protruding direction of the hook is alternate with the direction of movement of the locking end away from the locking hole. The hook and the blocking part can detachably abut against each other.

[0009] Preferably, the engaging end has a first position and a second position relative to each other in the height adjustment direction of the seat. When the engaging end engages with the locking hole, it can automatically move to the first position so that the hook abuts against the blocking part. The blocking part is used to prevent the engaging end from disengaging from the locking hole. When the engaging end moves to the second position, the hook disengages from the blocking part, thereby allowing the engaging end to move away from the locking hole.

[0010] Preferably, the direction from the first position to the second position is the direction in which the seat moves from a low gear to a high gear.

[0011] Preferably, a groove is formed between the blocking part and the inner wall of the locking hole, and the hook can be detachably engaged in the groove.

[0012] Preferably, the engaging end also has a driving ramp, which can drive the engaging end to disengage from the locking hole when subjected to force.

[0013] Preferably, the seat height adjustment mechanism further includes a release member and an elastic member. The release member is pivotally connected to the seat and abuts against the locking member. When the hook separates from the blocking part, the release member can drive the locking member to move and disengage from the locking hole. The elastic member is installed on the seat and abuts against the locking member. The elastic member makes the locking member always tend to engage with the locking hole.

[0014] Preferably, the seat height adjustment mechanism further includes a connecting seat, which is installed on the seat and slidably connected to the vehicle frame. The locking member and the unlocking member are respectively pivotally connected to the connecting seat. When the seat height is adjusted, the connecting seat is slid along the vehicle frame and the locking member is detachably engaged in any of the locking holes.

[0015] Preferably, the locking member further includes an abutting end, which forms an angle with the protruding direction of the engaging end and abuts against the releasing member. The releasing member acts on the abutting end to drive the engaging end to move and disengage from the locking hole.

[0016] Preferably, the locking member further includes a pivot portion for pivotally connecting with the connecting seat, wherein the engaging end and the abutting end are respectively connected to the pivot portion and protrude in two directions.

[0017] Preferably, the elastic element is mounted on the connecting seat and includes a first elastic arm and a second elastic arm. The first elastic arm is connected to the engaging end, and the second elastic arm abuts against the connecting seat. The elastic force of the elastic element causes the engaging end to always have a tendency to engage with the locking hole.

[0018] Preferably, one end of the release member is pivotally connected to the connecting seat and abuts against the abutting end, and the other end of the release member protrudes from the connecting seat to form an operating end.

[0019] Correspondingly, the present invention also discloses a stroller, which includes a frame and a seat adjustablely mounted on the frame, and further includes the seat height adjustment mechanism described above.

[0020] Preferably, when the locking member engages with the locking hole, the weight of the seat causes the locking member to move automatically until the hook abuts against the blocking part. When the seat is subjected to force and moves towards the top of the frame, the hook can be driven to disengage from the blocking part and the locking member can be driven to disengage from the locking hole.

[0021] Preferably, the engaging end also has a driving ramp, which, when the seat is moved towards the top of the frame, can cause the driving ramp to be forced and drive the locking member to disengage from the locking hole.

[0022] Preferably, the frame includes a rider, the locking lever is disposed inside the rider, and the seat height adjustment mechanism further includes a connecting seat slidably connected to the rider and connected to the seat. The locking member is pivotally connected to the connecting seat. When the seat is subjected to force and slides, it can drive the connecting seat to slide along the rider and cause the locking member to be separably engaged in any of the locking holes.

[0023] Preferably, the stroller further includes a slider that is slidably connected to the outside of the rider and connected to the connecting seat and the seat respectively.

[0024] Compared to existing technologies, the seat height adjustment mechanism of this invention features a blocking portion protruding from each locking hole. The locking member has an engaging end that can be detachably engaged with any locking hole, and the engaging end has a hook protruding from it. The hook's protruding direction is alternated with the direction of movement of the engaging end away from the locking hole, and the hook and blocking portion can be detachably abutted. Therefore, when the engaging end engages with the locking hole, the blocking portion abuts against the hook to prevent the engaging end from disengaging from the locking hole. Even if the locking member is accidentally operated, it cannot be pivoted to unlock. This avoids the seat unnecessarily sliding down the frame automatically due to accidental operation of the locking member, ensuring the stability and safety of the seat connection, and further ensuring the safety of infants and toddlers while riding in the stroller. Correspondingly, strollers with this seat height adjustment mechanism also have the same technical effect. Attached Figure Description

[0025] Figure 1 This is a side view of the stroller of the present invention in a usage state.

[0026] Figure 2 yes Figure 1Another schematic diagram showing the seat after adjustment.

[0027] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle.

[0028] Figure 4 This is an exploded view of the seat height adjustment mechanism of the present invention.

[0029] Figure 5 yes Figure 4 A schematic diagram of the locking mechanism.

[0030] Figure 6 This is a cross-sectional view of the seat height adjustment mechanism of the present invention.

[0031] Figure 7 yes Figure 6 A schematic diagram showing the locking element in the second position.

[0032] Figure 8 yes Figure 7 A schematic diagram showing the locking element disengaged from the locking hole. Detailed Implementation

[0033] Embodiments of the invention will now be described with reference to the accompanying drawings, in which similar reference numerals denote similar elements. The invention aims to provide a seat height adjustment mechanism 300 that can prevent the seat 200 from sliding down after accidental operation, and a stroller 1 having the mechanism.

[0034] Let's combine the following... Figures 1-4 As shown, the stroller 1 provided by the present invention includes a frame 100, a seat 200, and a seat height adjustment mechanism 300. The two sides of the seat 200 are adjustablely mounted on the frame 100 via two seat height adjustment mechanisms 300. Specifically, the frame 100 includes a handlebar 110 and front legs 120 and rear legs 130 pivotally connected thereto. Wheels 140 are respectively mounted on the front legs 120 and rear legs 130. The specific structure and connection method of the frame 100 are conventional in the art and will not be described in detail here. The seat 200 is adjustablely mounted on the two handlebars 110. By pulling the seat 200 upwards, the seat 200 can be directly adjusted to a higher position (see later description). When adjusting the seat 200 to a lower position, it is necessary to manually operate the seat height adjustment mechanism 300 to release it, thereby preventing the seat 200 from automatically sliding downwards when the seat height adjustment mechanism 300 is accidentally operated.

[0035] Continue reading Figure 1-3As shown, in this invention, each side of the seat 200 is provided with a mounting base 210 and a sliding member 220 and a backrest tube 230 connected to the mounting base 210. The seat 200 is slidably connected to the rider 110 via the sliding member 220. In this invention, by pulling the backrest tube 230 upward, the sliding member 220 can be slid upward along the rider 110, thereby adjusting the seat 200 to a higher position, making the adjustment operation more convenient. Of course, it is not limited to pulling the backrest tube 230 for adjustment; pulling any position of the seat 200 to make it slide upward can adjust it to a higher position. The structure and arrangement of other parts of the seat 200, such as the structure of the canopy tube and the armrest tube, are conventional in the art and will not be described in detail.

[0036] The following is combined with Figures 2-7 As shown, the stroller 1 of the present invention has two identical seat height adjustment mechanisms 300 arranged on both sides of the seat 200. Taking one side as an example, the description will be carried out. Specifically, the seat height adjustment mechanism 300 includes a connecting seat 310, a locking rod 320, and a locking member 330. The locking lever 320 is located inside the rider 110 and has a plurality of locking holes 321 spaced apart. Each locking hole 321 also has a protruding blocking part 322. The connecting seat 310 is slidably connected to the outside of the rider 110 and connected to the sliding member 220. When the sliding member 220 slides along the rider 110, it can drive the connecting seat 310 to slide accordingly. The locking member 330 is pivotally connected to the connecting seat 310 and has a locking end 331. The locking end 331 protrudes from the connecting seat 310 and is used to be detachably locked into any locking hole 321. Furthermore, the locking end 331 is also provided with a hook 3311. The protruding direction of the hook 3311 is alternated with the direction of movement of the locking end 331 away from the locking hole 321. The hook 3311 is used to detachably abut against the blocking part 322.

[0037] Combination Figure 1-2 , Figure 6-8 As shown, in this invention, the engaging end 331 has a first position and a second position relative to each other in the height adjustment direction of the seat 200. When the seat 200 is height adjusted, it will cause the connecting seat 310 to slide along the handlebar 110 and cause the locking member 330 to be separably engaged in either locking hole 321. Specifically, when the engaging end 331 is engaged in the locking hole 321, the seat 200 slides downward along the handlebar 110 under the action of gravity, thereby causing the locking member 330 to slide and its engaging end 331 to automatically move to the first position, thereby causing the hook 3311 to abut against the blocking part 322. The blocking part 322 is used to prevent the engaging end 331 from disengaging from the locking hole 321, such as... Figure 6 As shown; when the seat 200 is moved towards the top of the frame 100 under force, the locking member 330 can slide, thereby causing the engaging end 331 to move from the first position to the second position. At this time, the hook 3311 disengages from the blocking part 322, as shown. Figure 7 As shown, the engaging end 331 can then be moved to disengage from the locking hole 321 to release the lock, as shown. Figure 8 As shown, the height of the seat 200 can then be adjusted. The direction from the first position to the second position is the direction in which the seat 200 moves from a low position to a high position, i.e. Figure 1 The direction indicated by the middle arrow F1.

[0038] Continue reading Figure 6-7 As shown, the blocking part 322 protrudes from the lower end wall of the locking hole 321 and extends towards the upper end wall of the locking hole 321. Therefore, a groove 323 is formed between the blocking part 322 and the lower end wall and inner wall of the locking hole 321. The hook 3311 can be separably engaged in the groove 323. When the hook 3311 is engaged in the groove 323, the hook 3311 abuts against the blocking part 322. At this time, the locking member 330 cannot pivot to disengage the engaging end 331 from the locking hole 321.

[0039] Continue reading Figures 4-8 As shown, the locking member 330 also includes an abutting end 332 and a pivoting part 333. The pivoting part 333 has a pivoting hole 3331, through which the locking member 330 is pivotally connected to the connecting seat 310. The engaging end 331 and the abutting end 332 are respectively connected to the pivoting part 333 and their protrusion directions form an angle. The engaging end 331 protrudes outside the connecting seat 310 and is used to engage with the locking hole 321 in a separable manner. When the abutting end 332 is subjected to force, it can drive the locking member 330 to pivot, thereby causing the engaging end 331 to disengage from the locking hole 321.

[0040] More specifically, the engaging end 331 also has a driving ramp 3312, which is preferably arc-shaped, and the extending direction of the driving ramp 3312 is consistent with the protruding direction of the hook 3311. That is, the driving ramp 3312 extends arc-shaped from one side of the engaging end 331 to the end of the hook 3311. When the driving ramp 3312 is subjected to force, it can cause the locking member 330 to pivot, thereby causing the engaging end 331 to disengage from the locking hole 321. In this invention, when the seat 200 drives the connecting seat 310 to slide upward along the handlebar 110, the edge of the locking hole 321 will act on the driving ramp 3312, thereby pushing the locking member 330 to pivot and causing the engaging end 331 to disengage from the locking hole 321.

[0041] See again Figures 4-8As shown, the seat height adjustment mechanism 300 also includes a release member 340 and an elastic member 350. The release member 340 is pivotally connected to the connecting seat 310 and abuts against the abutting end 332 of the locking member 330. The elastic member 350 is installed on the seat 200 and abuts against the locking member 330. The elastic member 350 makes the locking member 330 always tend to engage with the locking hole 321. When the release member 340 is subjected to force, it can push the abutting end 332 to overcome the elastic force of the elastic member 350, thereby causing the engaging end 331 to move and disengage from the locking hole 321.

[0042] More specifically, one end of the release member 340 forms a pivot end 341, which has a pivot hole 3411. The release member 340 is pivotally connected to the connecting seat 310 through the pivot hole 3411 and abuts against the abutting end 332. The other end of the release member 340 protrudes from the connecting seat 310 to form an operating end 342. When the operating end 342 is subjected to force, it can drive the release member 340 to pivot, thereby driving the locking member 330 to pivot.

[0043] See Figure 4 In this invention, the elastic element 350 is mounted on the connecting seat 310 and includes a first elastic arm 351 and a second elastic arm 352. The first elastic arm 351 is connected to the engaging end 331, and the second elastic arm 352 abuts against the connecting seat 310. The elastic force of the elastic element 350 causes the engaging end 331 to always tend to engage with the locking hole 321. Preferably, the elastic element 350 is a torsion spring, but it is not limited to this, and other elastic elements can also be used.

[0044] Let's combine them again below. Figures 1-8 As shown, the height adjustment process and principle of the seat 200 of the stroller 1 of the present invention will be explained.

[0045] When seat 200 needs to be... Figure 1 The low gear setting shown is adjusted to Figure 2 When in the high position shown, simply pull the backrest tube 230 of the seat 200 upwards, that is, along the... Figure 1 Pulling the backrest tube 230 in the direction indicated by the middle arrow F1 will pull the seat 200 upward along the rider 110. The seat 200, through the slider 220, will cause the connecting seat 310 to slide upward along the rider 110. During the upward sliding of the connecting seat 310, it will also cause the locking member 330 to move upward. Figure 6 The first position shown is slid to Figure 7 The second position shown disengages the latch 3311 from the blocking part 322, as indicated. Figure 7As shown; continue pulling the backrest tube 230 to slide the seat 200 upward, causing the locking member 330 to continue moving upward. The driving inclined surface 3312 of the locking member 330 will interact with the end wall of the locking hole 321. By acting on the driving inclined surface 3312, the locking member 330 will pivot, thereby causing the engaging end 331 to disengage from the locking hole 321 and release the lock. Thus, the seat 200 can be directly pulled upward to adjust it to its position. Figure 2 The high-end position is shown. During the pivoting process of the locking member 330, the elastic member 350 is compressed and deformed.

[0046] When seat 200 moves to Figure 2 In the high position shown, the locking member 330 pivots under the elastic force of the elastic member 350, causing its engaging end 331 to engage again in the corresponding locking hole 321. After releasing the backrest tube 230, the seat 200 slides down along the handlebar 110 under its own weight. This process will cause the connecting seat 310 and the locking member 330 installed inside it to slide down. Therefore, the locking member 330 will slide to the first position, causing the hook 3311 to engage in the slot 323, so that the blocking part 322 abuts against the hook 3311. Figure 6 As shown, even if the release member 340 is accidentally operated, it cannot drive the locking member 330 to pivot and cause the engaging end 331 to disengage from the locking hole 321, thereby preventing the seat 200 from accidentally sliding down due to misoperation.

[0047] When seat 200 needs to be... Figure 2 The high setting shown is adjusted to Figure 1 When in the low gear position, the release mechanism 340 must be operated to release the locking mechanism 330 before the seat 200 can slide downwards along the rider 110. Specifically, first move the seat 200 along... Figure 1 Pulling upwards in the direction indicated by the middle arrow F1 causes the seat 200 to slide upwards again, causing the connecting seat 310 and its internal locking member 330 to slide from the first position to the second position, thereby disengaging the hook 3311 from the blocking part 322. Figure 7 As shown; then, by engaging the operating end 342 of the release member 340 to pivot it, the release member 340 will push the abutment end 332 of the locking member 330 to pivot, thereby causing the engaging end 331 to disengage from the locking hole 321, thus releasing the locking member 330, as shown. Figure 8 As shown; during the pivoting and unlocking process of locking member 330, elastic member 350 is compressed and deformed. Then, seat 200 can be pushed downwards along rider 110. When seat 200 is adjusted to... Figure 1When the low gear is shown, the release member 340 is released, and the locking member 330 is locked into the locking hole 321 again under the elastic force of the elastic member 350. At the same time, the seat 200 drives the locking member 330 to slide to the first position again, so that the hook 3311 automatically engages into the slot 323. The blocking part 322 and the hook 3311 abut against each other to prevent the seat 200 from accidentally sliding down when the release member 340 is accidentally touched.

[0048] In summary, because the seat height adjustment mechanism 300 of the present invention has a blocking portion 322 protruding in each locking hole 321, and the locking member 330 has a locking end 331 for detachably engaging with any locking hole 321, and the locking end 331 has a hook 3311 protruding, the protruding direction of the hook 3311 being alternated with the moving direction of the locking end 331 disengaging from the locking hole 321, and the hook 3311 and the blocking portion 322 are detachably abutted. Therefore, when the locking end 331 engages with the locking hole 321, the blocking portion 322 abuts against the hook 3311 to prevent the locking end 331 from disengaging from the locking hole 321. Even if the locking member 330 is accidentally operated, it cannot be pivoted to unlock. This avoids the seat 200 from unnecessarily sliding down the frame 100 due to accidental operation of the locking member 330, ensuring the stability and safety of the seat 200 connection, and further ensuring the safety of infants and young children riding in the vehicle.

[0049] Correspondingly, the stroller 1 with the seat height adjustment mechanism 300 also has the same technical effect.

[0050] The structures of the stroller 1 and its seat 200 involved in this invention are all conventional configurations well known to those skilled in the art, and will not be described in detail here.

[0051] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A seat height adjustment mechanism for adjusting the height of a seat (200) on a vehicle frame (100), characterized in that, include: A locking lever (320) is provided on the frame (100) and has at least two locking holes (321), each of the locking holes (321) having a blocking part (322). A locking member (330) is mounted on the seat (200) and has an engaging end (331) for detachably engaging in any of the locking holes (321), and the engaging end (331) is provided with a hook (3311) that detachably abuts against the blocking part (322); When the locking member (330) engages with the locking hole (321), the weight of the seat (200) causes the locking member (330) to move automatically until the hook (3311) abuts against the blocking part (322) to prevent the locking member (330) from separating from the locking hole (321). When the seat (200) is subjected to force and moves towards the top of the frame (100), the hook (3311) can be driven to disengage from the blocking part (322) to allow the locking member (330) to disengage from the locking hole (321).

2. The seat height adjustment mechanism according to claim 1, characterized in that, A groove (323) is formed between the blocking part (322) and the inner wall of the locking hole (321). When the locking member (330) is driven by gravity, the hook (3311) is engaged in the groove (323).

3. The seat height adjustment mechanism according to claim 1, characterized in that, The engaging end (331) also has a driving ramp (3312). When the seat (200) is moved by force and the hook (3311) has disengaged from the blocking part (322), the driving ramp (3312) can be forced to make the locking member (330) pivot out of the locking hole (321).

4. The seat height adjustment mechanism according to claim 1, characterized in that, It also includes a release member (340) operably connected to the locking member (330); when the hook (3311) disengages from the blocking part (322), operating the release member (340) can drive the locking member (330) to pivot, causing the engaging end (331) to disengage from the locking hole (321).

5. The seat height adjustment mechanism according to claim 4, characterized in that, The locking member (330) further includes an abutment end (332) that is angled to the engaging end (331), and the unlocking member (340) drives the locking member (330) to pivot by acting on the abutment end (332).

6. The seat height adjustment mechanism according to claim 4, characterized in that, It also includes an elastic element (350) that applies a force to the locking element (330) to make it tend to engage the engaging end (331) into the locking hole (321).

7. The seat height adjustment mechanism according to claim 6, characterized in that, The elastic element (350) is a torsion spring, which includes a first elastic arm (351) acting on the locking element (330) and a second elastic arm (352) for fixing.

8. The seat height adjustment mechanism according to claim 1, characterized in that, It also includes a connector (310) for mounting to the seat (200) and sliding along the frame (100), and the locking member (330) is pivotally connected to the connector (310).

9. The seat height adjustment mechanism according to claim 8, characterized in that, It also includes a slider (220) connected to the connecting seat (310) for driving the connecting seat (310) to slide along the frame (100).

10. A stroller, comprising a frame (100) and a seat (200), characterized in that, It also includes a seat height adjustment mechanism (300) according to any one of claims 1-9.

11. The stroller according to claim 10, characterized in that, The frame (100) includes a rider (110), and the locking lever (320) is located inside the rider (110).

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