Stroller

Abstract

The utility model discloses a pivoting structure of a baby stroller. The pivoting structure comprises a first pivoting seat, a second pivoting seat and locking teeth, the first pivoting seat is rotationally connected with the second pivoting seat, and the second pivoting seat is provided with a first groove and a second groove which are different in size. The lock tooth is located between the two pivot joint seats and connected with the first pivot joint seat. The lock teeth are provided with first teeth and second teeth which are different in length, and the first teeth and the second teeth are matched with the first grooves and the second grooves to achieve locking or unlocking. The lock teeth have a locking state and an unlocking state, and in the locking state, the second teeth are sunk into the first grooves and / or the second grooves, and / or the first teeth are sunk into the first grooves, so that the rotation of the second pivoting seat is limited. In the unlocking state, the lock teeth are separated from the first groove and the second groove so as to allow the second pivoting seat to rotate. According to the child cart, the lock teeth can be in the locking state and the unlocking state under the condition that the number of the lock teeth is not reduced, so that the structural strength of the lock teeth is guaranteed, the working condition of the child cart is more stable, and the service life is longer.

Description

Technical Field

[0001] The utility model relates to a stroller, in particular to a children's stroller. Background Art

[0002] To meet consumer demands for practicality and ease of use, stroller handlebars are typically designed to rotate or retract to accommodate users of varying heights. For example, the upper handlebar can rotate relative to the stroller body to a smaller angle with the horizontal plane to accommodate shorter users; the upper handlebar can also rotate relative to the stroller body to a smaller angle with the vertical plane to accommodate taller users.

[0003] In the related art, the upper push handle and the vehicle body are often connected by a spline to achieve torque transmission and axial positioning. In some applications, in order to limit the relative angle between the two rotating parts, designers often need to reduce the number of teeth on the spline. Although this approach can achieve angle limitation, it will also lead to a reduction in the structural strength of the spline, thereby affecting the stability and reliability of the entire mechanical system. Specifically, reducing the number of spline teeth will weaken the load-bearing capacity of the spline, making it more susceptible to damage. In addition, the reduction in the number of teeth may also lead to an increase in the fit clearance between the spline and the shaft, thereby affecting the accuracy and efficiency of the transmission. Utility Model Content

[0004] The main purpose of the present invention is to provide a child stroller that can enable the lock teeth to have a locked state and a released state without reducing the number of lock teeth, so that the strength of the lock tooth structure of the present invention is guaranteed, and the working condition of the child stroller of the present invention is more stable and the service life is longer.

[0005] To achieve the above objectives, some embodiments of the present invention provide a child stroller, comprising:

[0006] The first pivot seat,

[0007] The second pivot seat is rotatably connected to the first pivot seat and is configured to rotate relative to the first pivot seat about the rotation axis. The second pivot seat is provided with a first groove and a second groove on a side facing the first pivot seat. The first groove and the second groove are distributed about the rotation axis, and the first groove is larger than the second groove in a direction perpendicular to the rotation axis.

[0008] A lock tooth is provided between the first pivot seat and the second pivot seat and is connected to the first pivot seat, the lock tooth comprising a first tooth and a second tooth protruding in a direction perpendicular to the rotation axis, the length of the first tooth being greater than the length of the second tooth in the direction perpendicular to the rotation axis, the length of the first tooth being greater than the length of the second groove, the first tooth being adapted to cooperate with the first groove, and the second tooth being adapted to cooperate with the second groove and / or the first groove;

[0009] Wherein, the locking teeth are configured to be able to move in a direction parallel to the rotation axis to a locked state or an unlocked state. In the locked state, the second tooth moves in a direction parallel to the rotation axis to sink into the second groove and / or the first groove, and / or the first tooth moves in a direction parallel to the rotation axis to sink into the first groove, so as to limit the rotation of the second pivot seat relative to the first pivot seat. In the unlocked state, both the first tooth and the second tooth move in a direction parallel to the rotation axis to disengage from the first groove and the second groove, so that the second pivot seat can rotate relative to the first pivot seat.

[0010] In some embodiments, the first groove and the second groove are alternately distributed circumferentially around the rotation axis. This alternately distributed design enables the locking teeth to fix the second pivot seat at multiple different angles through the cooperation of the first tooth and the second tooth with the first groove and the second groove, thereby realizing multi-gear adjustment of the second pivot seat of the stroller to fit user groups of different heights.

[0011] In some embodiments, multiple first grooves are centrosymmetric about the rotation axis, and multiple second grooves are centrosymmetric about the rotation axis. Such a design ensures that the locking teeth can precisely cooperate with the first groove and the second groove no matter which direction they move, thereby realizing the locking of the second pivot seat at different angular positions. The symmetric design also enhances the balance of the entire mechanism, reduces the unbalanced torque that may be generated during rotation, and improves the stability and service life of the stroller.

[0012] In some embodiments, the locking teeth include two first teeth, and the two first teeth are symmetric about the plane where the rotation axis is located. This symmetric design enables the locking teeth to cooperate with the first groove in two directions, improving the stability and durability of the locking teeth.

[0013] In some embodiments, the second pivot seat includes two third grooves, the two third grooves are symmetric about the plane where the rotation axis is located. Along the direction perpendicular to the rotation axis, the length of the third groove is greater than the length of the first tooth. Circumferentially around the rotation axis, the third groove is located between the alternately distributed first groove and the second groove, and the third groove covers at least two second grooves. By introducing the third groove between the first groove and the second groove, both the first tooth and the second tooth can be adapted to the third groove. The third groove covers at least two second grooves circumferentially around the rotation axis, that is, the first tooth can move arbitrarily circumferentially around the rotation axis within the area of the third groove. Therefore, the introduction of the third groove can reduce the limitation caused by the adaptability of the first tooth, so the introduction of the third groove expands the angular adjustment range of the second pivot seat.

[0014] In some embodiments, the second pivot seat has a height adjustment position. At the height adjustment position, the first tooth is located in the third groove, and the second tooth cooperates with the second groove or the second tooth cooperates with the first groove. The first tooth in the height adjustment state is limited to move within the area of the third groove, so that the first tooth is less restricted. As a result, the adjustment angle of the height adjustment position of the second pivot seat has a wider selectivity, providing a variety of height adjustment positions for users to choose from, so as to more closely fit the heights of different users.

[0015] In some embodiments, the first pivot seat includes a chamfer. The second pivot seat has a limit position. At the limit position, one side of the second pivot seat in the circumferential direction around the rotation axis abuts against the chamfer. The chamfer prevents the further rotation of the second pivot seat and limits the maximum movement angle of the second pivot seat. On the one hand, it improves the safety of the stroller. On the other hand, if the position of the first groove is reasonably distributed so that the locking tooth is in the unlocked state when the second pivot seat is in the limit position, the locking tooth can directly enter the locked state after the user rotates the second pivot seat. While simplifying the operation, it provides a larger rotation angle for the second pivot seat, making it more convenient for storage and the operation is more concise.

[0016] In some embodiments, the stroller further includes a spring. The first pivot seat is provided with a connecting post, the connecting post protrudes towards the second pivot seat, the spring is sleeved on the connecting post, and the locking tooth abuts against one side of the spring facing the second pivot seat. The spring provides an elastic force along the rotation axis to enable the locking tooth to enter the locked state. The design of the spring is used to assist the locking tooth to enter the locked state so that the locking tooth can self-lock.

[0017] In some embodiments, the locking tooth is provided with a fourth groove, the fourth groove is annular, and one end of the spring facing the second pivot seat sinks into the fourth groove. The introduction of the fourth groove enhances the connection stability between the spring and the locking tooth, ensuring that the locking tooth can maintain its position more firmly in the locked state.

[0018] In some embodiments, the first pivot seat is provided with a mounting groove, the mounting groove matches the locking tooth, and the locking tooth is sunk into the mounting groove to be fixed relative to the first pivot seat in the circumferential direction along the rotation axis. Such a setting ensures that the locking tooth does not rotate circumferentially relative to the first pivot seat during the conversion between the locked and unlocked states. This design ensures the stability of the locking tooth in the locked state and improves the safety and reliability during the angle adjustment of the second pivot seat.

[0019] According to the above embodiments, the beneficial effects of the present utility model are:

[0020] The baby stroller of the present utility model includes a first pivot seat, a second pivot seat and locking teeth. The first pivot seat and the second pivot seat are rotatably connected, and the movement state of the first pivot seat relative to the second pivot seat is controlled by the locking teeth. Specifically, the locking teeth are arranged between the first pivot seat and the second pivot seat and are connected to the first pivot seat; the locking teeth have a first tooth and a second tooth, and the second pivot seat is provided with a first groove and a second groove. The locking teeth can move in a direction parallel to the rotation axis. When the teeth of the locking teeth fall into the grooves of the second pivot seat, the locking teeth restrict the rotation of the second pivot seat relative to the first pivot seat, and at this time the locking teeth are in a locked state; when the teeth of the locking teeth disengage from the grooves of the second pivot seat, the locking teeth release the connection between the second pivot seat and the first pivot seat, enabling the second pivot seat to rotate relative to the first pivot seat, and at this time the locking teeth are in an unlocked state.

[0021] Regarding the first tooth and the second tooth of the locking teeth and the first groove and the second groove of the second pivot seat, further, both the first tooth and the second tooth protrude in a direction perpendicular to the rotation axis, the lengths of the first groove and the second groove both extend in a direction perpendicular to the rotation axis, and the length of the first tooth is greater than the length of the second tooth, and the length of the first groove is greater than the length of the second groove. Among them, the first tooth is only adapted to cooperate with the first groove, and the second tooth is adapted to cooperate with the second groove and / or the first groove. Thus, in the locked state, the second tooth moves in a direction parallel to the rotation axis to fall into the second groove and / or the first groove, and / or the first tooth moves in a direction parallel to the rotation axis to fall into the first groove to restrict the rotation of the second pivot seat relative to the first pivot seat; in the unlocked state, both the first tooth and the second tooth move in a direction parallel to the rotation axis to disengage from the first groove and the second groove, so that the second pivot seat can rotate relative to the first pivot seat.

[0022] Among them, the first tooth can only cooperate with the first groove. In other words, circumferentially around the rotation axis, if the first groove is not at a specific position, the first tooth will be blocked by the circumferential wall of the second pivot seat along the rotation axis and cannot fall into the first groove, so that the locking teeth cannot enter the locked state. Until the second pivot seat continues to rotate around the rotation axis to the next angle, making the first groove located at this specific position, at this time the first tooth smoothly falls into the first groove along the direction of the rotation axis, so that the locking teeth enter the locked state and fix the second pivot seat at this specific angle. Therefore, it can be understood that by setting the circumferential distribution of the first groove around the rotation axis, different angular fixed states of the second pivot seat can be defined. Therefore, in this application, by designing the first tooth and the second tooth with different sizes, and the first groove and the second groove for cooperating with the first tooth and the second tooth, the effect of being able to adjust the position of the second pivot seat at multiple angles is obtained without changing the number of teeth of the locking teeth. The number of teeth of the locking teeth remains unchanged, and the structural strength of the locking teeth is higher. Therefore, this application has stronger structural strength than the structure that changes the number of teeth of the locking teeth in the prior art. The baby stroller using the structure of this application has better stability and longer service life.

[0023] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0025] Figure 1 Structural schematic diagram of a stroller in an embodiment of the present utility model;

[0026] Figure 2 Structural schematic diagram of the stroller after folding in an embodiment of the present utility model;

[0027] Figure 3 Structural schematic diagram of the second pivot seat in the height adjustment position and the folding position in an embodiment of the present utility model;

[0028] Figure 4 Structural schematic diagram of the connection between the second pivot seat and the first pivot seat viewed from the first perspective in an embodiment of the present utility model;

[0029] Figure 5 For Figure 4 exploded structural schematic diagram;

[0030] Figure 6 For Figure 5 enlarged view at A in

[0031] Figure 7 Cross-sectional structural schematic diagram of the connection between the second pivot seat and the first pivot seat viewed from the second perspective in an embodiment of the present utility model, where the locking teeth are in the locked state;

[0032] Figure 8 For Figure 7 enlarged view at B in

[0033] Figure 9 Cross-sectional structural schematic diagram of the connection between the second pivot seat and the first pivot seat viewed from the third perspective in an embodiment of the present utility model, where the locking teeth are in the unlocked state;

[0034] Figure 10 For Figure 9 enlarged view at C in

[0035] Figure 11Explosion structure schematic diagram of the second pivot seat connected to the first pivot seat as observed from the fourth perspective in an embodiment of the present utility model;

[0036] Figure 12 It is Figure 11 The enlarged view at position D in

[0037] Figure 13 Cross-sectional structure schematic diagram of the second pivot seat connected to the first pivot seat as observed from the fifth perspective in an embodiment of the present utility model, where the second pivot seat is in the height adjustment position;

[0038] Figure 14 It is Figure 13 The enlarged view at position E in

[0039] Figure 15 Cross-sectional structure schematic diagram of the second pivot seat connected to the first pivot seat as observed from the fifth perspective in an embodiment of the present utility model, where the second pivot seat is in the folded position;

[0040] Figure 16 It is Figure 15 The enlarged view at position F in

[0041] Explanation of the reference numerals in the drawings:

[0042] Push handle 100; First pivot seat 110; Installation groove 111; Chamfer 112; Connecting column 113;

[0043] Pull handle 200; Second pivot seat 210; First groove 211; Second groove 212; Third groove 213;

[0044] Lock teeth 300; First tooth 310; Second tooth 320; Fourth groove 330;

[0045] Spring 400;

[0046] Front foot 500;

[0047] Rear foot 600;

[0048] Seat assembly 700;

[0049] Release button 800;

[0050] Height adjustment position 910; Folded position 920.

[0051] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0052] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0053] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0054] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating 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, if "and / or", "or / and", or "and / or" appear throughout the text, their meanings include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can 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 protection scope required by the present utility model.

[0055] In the related art, the upper push handle and the vehicle body are often connected by splines to achieve torque transmission and axial positioning. In some application scenarios, in order to limit the relative angle between two rotating parts, designers often need to reduce the number of spline teeth. Although this approach can achieve angle limitation, it will also reduce the structural strength of the splines, thereby affecting the stability and reliability of the entire mechanical system. Specifically, reducing the number of spline teeth will weaken the load-bearing capacity of the splines and make them more vulnerable to damage. In addition, the reduction in the number of teeth may also lead to an increase in the clearance between the splines and the shaft, thereby affecting the transmission accuracy and efficiency.

[0056] Next, refer to Figures 1 to 16 to describe a baby stroller according to an embodiment of the present utility model.

[0057] Refer to Figures 1 to 6, in an embodiment of the first aspect, the baby stroller of the present utility model includes a first pivot seat 110, a second pivot seat 210, and a locking tooth 300. The first pivot seat 110 and the second pivot seat 210 are rotatably connected, and the movement state of the first pivot seat 110 relative to the second pivot seat 210 is controlled by the locking tooth 300. Refer to Figures 7 to 10 , specifically, the locking tooth 300 is disposed between the first pivot seat 110 and the second pivot seat 210, and the locking tooth 300 is connected to the first pivot seat 110; the locking tooth 300 has a first tooth 310 and a second tooth 320, and the second pivot seat 210 is provided with a first groove 211 and a second groove 212. The locking tooth 300 can move in a direction parallel to the rotation axis. When the tooth of the locking tooth 300 sinks into the groove of the second pivot seat 210, the locking tooth 300 restricts the rotation of the second pivot seat 210 relative to the first pivot seat 110. At this time, the locking tooth 300 is in a locked state; when the tooth of the locking tooth 300 disengages from the groove of the second pivot seat 210, the locking tooth 300 releases the connection between the second pivot seat 210 and the first pivot seat 110, enabling the second pivot seat 210 to rotate relative to the first pivot seat 110. At this time, the locking tooth 300 is in an unlocked state.

[0058] Regarding the first tooth 310, the second tooth 320 of the locking tooth 300 and the first groove 211, the second groove 212 of the second pivot seat 210, refer to Figures 11 to 16Furthermore, the first tooth 310 and the second tooth 320 both protrude in a direction perpendicular to the rotation axis, the first groove 211 and the second groove 212 both extend in a direction perpendicular to the rotation axis, and the length of the first tooth 310 is greater than that of the second tooth 320, while the length of the first groove 211 is greater than that of the second groove 212. The first tooth 310 is adapted only to mate with the first groove 211, while the second tooth 320 is adapted to mate with the second groove 212 and / or the first groove 211. Thus, in the locked state, the second tooth 320 moves in a direction parallel to the rotation axis until it is trapped in the second groove 212 and / or the first groove 211, and / or the first tooth 310 moves in a direction parallel to the rotation axis until it is trapped in the first groove 211, thereby restricting the rotation of the second pivot seat 210 relative to the first pivot seat 110. In the unlocked state, the first tooth 310 and the second tooth 320 both move in a direction parallel to the rotation axis until they are disengaged from the first groove 211 and the second groove 212, thereby enabling the second pivot seat 210 to rotate relative to the first pivot seat 110. It can be understood that the length of the first tooth 310 is designed to be L1, and the length of the second tooth 320 is designed to be L2, with L1 being greater than L2. The length of the first slot 211 is designed to be W1, and the length of the second slot 212 is designed to be W2, with W1 being greater than W2. The first tooth 310 can only mate with the first slot 211, which means that the width of the first tooth 310 matches the width of the first slot 211 and the first tooth 310 cannot mate with the second slot 212 because the length of the first tooth 310 exceeds the length that the second slot 212 can accommodate. The width of the second tooth 320 matches the width of the second slot 212, but the second tooth 320 can also mate with the first slot 211 because the length of the first slot 211 is greater than the length of the second tooth 320. Such a design enables the lock teeth 300 to be in the locked state, with the first tooth 310 sinking into the first groove 211 and the second tooth 320 sinking into the second groove 212 or the first groove 211, thereby limiting the rotation of the second pivot seat 210 relative to the first pivot seat 110; and in the unlocked state, the first tooth 310 and the second tooth 320 both withdraw from the first groove 211 and the second groove 212, thereby allowing the second pivot seat 210 to rotate relative to the first pivot seat 110.

[0059] The first tooth 310 can only cooperate with the first groove 211. In other words, in the circumferential direction around the rotation axis, if the first groove 211 is not at a specific position, the first tooth 310 will be blocked by the surface of the second pivot seat 210 along the rotation axis and cannot be inserted into the first groove 211, so that the locking tooth 300 cannot enter the locked state. Until the second pivot seat 210 continues to rotate around the rotation axis to the next angle, making the first groove 211 at this specific position. At this time, the first tooth 310 smoothly inserts into the first groove 211 along the direction of the rotation axis, and thus the locking tooth 300 enters the locked state, fixing the second pivot seat 210 at this specific angle. Therefore, it can be understood that by setting the circumferential distribution of the first groove 211 around the rotation axis, different angular fixed states of the second pivot seat 210 can be defined. Therefore, in this application, by designing the first tooth 310 and the second tooth 320 with different sizes, and the first groove 211 and the second groove 212 for cooperating with the first tooth 310 and the second tooth 320, the effect of being able to adjust the position of the second pivot seat 210 at multiple angles is obtained without changing the number of teeth of the locking tooth 300. The number of teeth of the locking tooth 300 remains unchanged, and the structural strength of the locking tooth 300 is higher. Therefore, this application has a stronger structural strength compared with the design of adjusting the angle by changing the number of teeth of the locking tooth 300 in the prior art. The stroller using the structure of this application has better stability and a longer service life.

[0060] It can be understood that, in order to make the assembly of the locking tooth 300 more stable, in some embodiments, the surface of the locking tooth 300 facing the second pivot seat 210 is flush, and the depths of the first groove 211 and the second groove 212 are equal.

[0061] Refer to Figure 12, in some embodiments, in the circumferential direction around the rotation axis, the first groove 211 and the second groove 212 are alternately distributed. This alternately distributed design enables the locking teeth 300 to fix the second pivot seat 210 at multiple different angles through the cooperation of the first teeth 310 and the second teeth 320 with the first groove 211 and the second groove 212, thereby realizing multi-gear adjustment of the second pivot seat 210 of the baby stroller to fit user groups of different heights. For example, assuming that the circumferential direction of the rotation axis is divided into multiple equal parts, and each equal part represents a fixed angle, then the first groove 211 and the second groove 212 can be alternately distributed according to a certain rule. For example, a first groove 211 is provided every other equal part, and the remaining equal parts are set as the second groove 212. As the second pivot seat 210 rotates, the first teeth 310 will fall into the first groove 211 at specific angular positions, thereby causing the locking teeth 300 to enter the locked state and fixing the position of the second pivot seat 210. The second teeth 320 can flexibly cooperate with the first groove 211 or the second groove 212, making the locking of the locking teeth 300 more flexible at different angles. This arrangement ensures that the locking teeth 300 can cooperate with the first groove 211 and the second groove 212 at different angular positions, thereby realizing multi-angle positioning of the second pivot seat 210.

[0062] Referring to Figure 12 , in some embodiments, multiple first grooves 211 are centrosymmetric about the rotation axis, and multiple second grooves 212 are centrosymmetric about the rotation axis. Such a design ensures that no matter which direction the locking teeth 300 move, they can precisely cooperate with the first groove 211 and the second groove 212, thereby realizing the locking of the second pivot seat 210 at different angular positions. The symmetric design also enhances the balance of the entire mechanism, reduces the unbalanced torque that may be generated during rotation, and improves the stability and service life of the baby stroller.

[0063] It can be understood that, in some embodiments, the same number of first grooves 211 and second grooves 212 are provided on both sides of the rotation axis, and the positions and sizes of these grooves are exactly the same, forming mirror symmetry. For example, if four first grooves 211 and four second grooves 212 are provided on one side of the rotation axis, then four first grooves 211 and four second grooves 212 are also provided on the other side, and their positions and sizes are exactly the same as the grooves on one side. Such a design ensures that the locking teeth 300 can find a suitable groove for cooperation on either side, thereby realizing locking at multiple positions. In addition, the symmetric distribution of the first groove 211 and the second groove 212 can also ensure the balance of the second pivot seat 210 when adjusting the angle. When the first pivot seat 110 and the second pivot seat 210 are locked through the locking teeth 300, the symmetric groove distribution can ensure that the locking teeth 300 are evenly distributed on both sides, reducing the imbalance caused by one side being locked and the other side not being locked, and improving the smoothness of the adjustment process of the second pivot seat 210.

[0064] Referring to Figure 12 , in some embodiments, the locking teeth 300 include two first teeth 310, and the two first teeth 310 are symmetric about the plane where the rotation axis is located. This symmetric design enables the locking teeth 300 to cooperate with the first groove 211 in both directions, improving the stability and durability of the locking teeth 300.

[0065] It can be understood that the design of the two first teeth 310 can ensure that the locking teeth 300 can cooperate with the first groove 211 on both sides, thereby increasing the chance of cooperation between the locking teeth 300 and the first groove 211 and improving the success rate of locking of the locking teeth 300. In addition, the symmetric design can also ensure that the locking teeth 300 are evenly stressed in the locked state, reducing the wear of the locking teeth 300 during long-term use and extending the service life of the locking teeth 300; in addition, the two symmetric first teeth 310 can also improve the safety of the stroller during use. When the locking teeth 300 are locked, the locking teeth 300 on both sides can cooperate with the first groove 211 at the same time, which can prevent the instability caused by one side being locked and the other side not being locked, improving the safety of the stroller during travel.

[0066] Referring to Figure 6 and Figure 12 , in the embodiments of the second aspect, the second pivot seat 210 includes two third grooves 213, the two third grooves 213 are symmetric about the plane where the rotation axis is located, along the direction perpendicular to the rotation axis, the length of the third groove 213 is greater than the length of the first tooth 310, in the circumferential direction around the rotation axis, the third groove 213 is located between the alternately distributed first grooves 211 and second grooves 212, and the third groove 213 covers at least two second grooves 212. The design of the third groove 213 is to further increase the cooperation flexibility between the locking teeth 300 and the second pivot seat 210. When the second pivot seat 210 rotates to a specific angle, the two first teeth 310 can smoothly fall into the two third grooves 213, and at this time the second tooth 320 will cooperate with one of the first groove 211 or the second groove 212, thereby realizing the locking of the second pivot seat 210 relative to the first pivot seat 110. Since the introduction of the third groove 213 can reduce the limitation caused by the adaptability of the first tooth 310, this design allows the adjustment angle of the second pivot seat 210 to be more refined, enabling the user to more precisely adjust the angle of the second pivot seat 210 according to needs.

[0067] Next, the design principle of the third slot 213 will be further clarified. Specifically, the length of the third slot 213 is greater than that of the first tooth 310, which enables the first tooth 310 to smoothly fall into the third slot 213 at a specific position without being obstructed by the wall of the second pivot base 210. At the same time, since the third slot 213 covers at least two second slots 212, it means that when the first tooth 310 falls into the third slot 213, the second tooth 320 can cooperate with at least one second slot 212, or in some cases, the second tooth 320 may also cooperate with the first slot 211. Such a design ensures that even when the third slot 213 is in use, the locking teeth 300 can still effectively restrict the rotation of the second pivot base 210.

[0068] The introduction of the third slot 213 makes the angle adjustment of the second pivot base 210 more flexible, enabling more gear adjustments, and increasing the convenience and comfort during use. In addition, since the first tooth 310 and the second tooth 320 can cooperate with the third slot 213 and other slots respectively in the locked state, this helps to improve the structural strength of the locking teeth 300, thereby enhancing the stability of the stroller. Without increasing the number of teeth of the locking teeth 300, through the design of adding the third slot 213, the function of more angle adjustments is achieved, improving the overall performance and service life of the stroller.

[0069] Refer to Figure 3 、 Figure 6 、 Figure 12 and Figures 14 to 16 In some embodiments, the second pivot base 210 has a height adjustment position 910. At the height adjustment position 910, the first tooth 310 is located in the third slot 213, and the second tooth 320 cooperates with the second slot 212 or the second tooth 320 cooperates with the first slot 211. The presence of the third slot 213 provides a larger fitting space for the first tooth 310, such that when the first tooth 310 cooperates with the second pivot base 210 at the position corresponding to the third slot 213, it will not be unable to lock due to the obstruction of the wall of the second pivot base 210. Limiting the first tooth 310 in the height adjustment state to move within the area of the third slot 213 makes the first tooth 310 less restricted, so that the adjustment angle selectivity of the height adjustment position 910 of the second pivot base 210 is more extensive, providing a variety of height adjustment positions 910 for users to choose from to more appropriately fit the heights of different users.

[0070] Refer to Figures 13 to 16In some embodiments, the first pivot seat 110 includes a chamfer 112, and the second pivot seat 210 has an extreme position. At the extreme position, one side of the second pivot seat 210 in the circumferential direction around the rotation axis abuts the chamfer 112. The chamfer 112 prevents further rotation of the second pivot seat 210, limiting the maximum movable angle of the second pivot seat 210. This improves the safety of the stroller. On the other hand, if the position of the first slot 211 is reasonably distributed so that the locking teeth 300 are in the unlocked state when the second pivot seat 210 is in the extreme position, the locking teeth 300 can directly enter the locked state after the user rotates the second pivot seat 210. This simplifies operation while providing the second pivot seat 210 with a larger rotation angle, making storage easier and more convenient.

[0071] Reference Figures 7 to 10 In some embodiments, the stroller further includes a spring 400. The first pivot seat 110 is provided with a connecting post 113, which protrudes toward the second pivot seat 210. The spring 400 is sleeved on the connecting post 113. The locking tooth 300 abuts against the side of the spring 400 facing the second pivot seat 210, and the other end of the spring 400 abuts against the first pivot seat 110. The spring 400 provides elastic force along the rotation axis to lock the locking tooth 300. The spring 400 is designed to assist the locking tooth 300 in entering the locked state, enabling the locking tooth 300 to self-lock. Specifically, when the lock tooth 300 is in the unlocked state, that is, when the first tooth 310 and the second tooth 320 are both out of the first groove 211 and the second groove 212, the elastic force provided by the spring 400 causes the lock tooth 300 to move in a direction parallel to the rotation axis, so that the first tooth 310 and the second tooth 320 of the lock tooth 300 can more smoothly sink into the first groove 211 and the second groove 212, thereby achieving self-locking of the lock tooth 300. It is understood that the elastic force of the spring 400 is designed to be sufficient to overcome the friction force during the movement of the lock tooth 300, so that the lock tooth 300 can automatically enter the locked state without the need for additional external force.

[0072] Reference Figures 6 to 10 In some embodiments, the locking tooth 300 is provided with a fourth groove 330. The fourth groove 330 is annular, and the end of the spring 400 facing the second pivot seat 210 is recessed into the fourth groove 330. The introduction of the fourth groove 330 enhances the connection stability between the spring 400 and the locking tooth 300, ensuring that the locking tooth 300 can more firmly maintain its position in the locked state, thereby improving the stability of the stroller.

[0073] It is understandable that the design of the fourth groove 330 needs to match the diameter of the spring 400 to ensure that the spring 400 can stably sink into the fourth groove 330. At the same time, the elastic coefficient of the spring 400 also needs to be considered to ensure that the spring 400 can provide sufficient elastic force to help the locking tooth 300 smoothly enter the locked state. The depth of the fourth groove 330 also needs to be appropriate, ensuring that the spring 400 can stably sink in while avoiding being too deep to make it difficult for the spring 400 to escape from the fourth groove 330. Through such a design, it is ensured that the locking tooth 300 can maintain its position more firmly in the locked state, improving the stability and safety of the adjustment of the baby stroller.

[0074] Referring to Figure 12 , in some embodiments, the first pivot seat 110 is provided with an installation groove 111, and the installation groove 111 matches the locking tooth 300, that is, the shape and size of the installation groove 111 are designed to match the locking tooth 300. The locking tooth 300 is trapped in the installation groove 111 to be fixed relative to the first pivot seat 110 in the circumferential direction along the rotation axis. Such a setting ensures that the locking tooth 300 will not rotate circumferentially relative to the first pivot seat 110 during the conversion between the locked and unlocked states. This design ensures the stability of the locking tooth 300 in the locked state and improves the safety and reliability during the angle adjustment of the second pivot seat 210.

[0075] Referring to Figures 1 to 16 , in a preferred embodiment, the baby stroller of the present application is systematically explained. The upper push handle 200 of the baby stroller is for the user to hold to control the stroller. The upper push handle 200 is connected to the lower push handle 100, and the lower push handle 100 is connected to the body main components such as the seat assembly 700, the front feet 500, and the rear feet 600. Among them, the second pivot seat 210 is a part of the upper push handle 200, and the first pivot seat 110 is a part of the lower push handle 100. The second pivot seat 210 rotates relative to the first pivot seat 110 to adjust the angle of the upper push handle 200 relative to the horizontal plane or the angle of the upper push handle 200 relative to the vertical plane, so as to facilitate users of different heights to control the baby stroller of the present application. The locking tooth 300 connects the upper push handle 200 and the lower push handle 100. The principle related to the locking tooth 300 of the present application has been described above and will not be elaborated here.

[0076] The locking tooth 300 realizes the self-locking function through an elastic member. Specifically, the baby stroller further includes an unlocking button 800, and the unlocking button 800 is arranged on the side of the locking tooth 300 facing the second pivot seat 210. The outer peripheral edge of the unlocking button 800 abuts against the locking tooth 300 along the direction of the rotation axis, and the inner peripheral edge of the unlocking button 800 abuts against the side of the flange of the connecting column 113 facing the first pivot seat 110, thereby restricting the maximum stroke of the unlocking button 800 moving in the direction away from the first pivot seat 110. When the user presses the unlocking button 800, the unlocking button 800 moves along the rotation axis towards the first pivot seat 110, and the locking tooth 300 disengages from the second pivot seat 210 along the direction of the rotation axis, and the locking tooth 300 enters the unlocking state. At this time, after slightly rotating the second pivot seat 210, the first tooth 310 and the second tooth 320 will be misaligned with the previously mating first groove 211 or second groove 212. The locking tooth 300 has a tendency to move towards the second pivot seat 210 along the rotation axis under the action of the elastic force of the spring 400. However, due to this misalignment relationship, the first tooth 310 and the second tooth 320 are abutted by the second pivot seat 210, so the locking tooth 300 cannot enter the locking state. Therefore, after pressing the unlocking button 800, there is no need to always keep pressing the unlocking button 800 during the process of adjusting the upper handle position. Continuing to rotate the second pivot seat 210, after reaching the preset angle, the first tooth 310 and the second tooth 320 respectively reach the positions of the corresponding first groove 211 and / or second groove 212, and under the action of the elastic member, they move along the direction of the rotation axis and fall into the corresponding first groove 211 and / or second groove 212, and the locking tooth 300 enters the locking state.

[0077] The upper push handle 200 has a height adjustment position 910. At the height adjustment position 910, the first tooth 310 moves within the third groove 213. The third groove 213 has a wider coverage area around the rotation axis. The introduction of the third groove 213 can reduce the limitation caused by the adaptability of the first tooth 310. The principle has been described above and will not be elaborated here. Therefore, this design facilitates that when the upper push handle 200 is at the height adjustment position 910, there are more angles for the user to choose.

[0078] The upper push handle 200 further has a folded position 920, which is the position where the included angle between the upper push handle 200 and the horizontal plane is the smallest under the condition that the locking teeth 300 can enter the locked state. Designing the folded position 920 facilitates the storage of the baby stroller of the present application. It should be noted that after the upper push handle 200 reaches the folded position 920, the first tooth 310 disengages from the third groove 213 along the circumferential direction of the rotation axis and cooperates with the first groove 211. Further, the lower push handle 100 is provided with a chamfer 112. If the upper push handle 200 continues to rotate in this direction, before the first tooth 310 cooperates with the next first groove 211 and / or the third groove 213, the chamfer 112 will abut against the upper push handle 200, preventing the upper push handle 200 from continuing to rotate, that is, if the upper push handle 200 continues to rotate in this direction, the locking teeth 300 cannot enter the locked state. With such a design, the further rotation of the second pivot seat 210 is blocked by the chamfer 112, and the maximum movement angle of the second pivot seat 210 is limited. On the one hand, the safety of the baby stroller is improved. On the other hand, if the positions of the first grooves 211 are reasonably distributed so that the locking teeth 300 are in the unlocked state when the second pivot seat 210 is in the extreme position, the locking teeth 300 can directly enter the locked state after the user rotates the second pivot seat 210. While simplifying the operation, a larger rotation angle is provided for the second pivot seat 210, making it more convenient for storage and the operation more concise. In summary, the present application can enable the locking teeth 300 to have a locked state and an unlocked state without reducing the number of teeth of the locking teeth 300, so that the structural strength of the locking teeth 300 of the present application is ensured, the working conditions of the baby stroller of the present application are more stable, and the service life is longer.

[0079] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A baby stroller, characterized in that: include: The first pivot seat, a second pivot seat rotatably connected to the first pivot seat and configured to rotate relative to the first pivot seat about a rotation axis, wherein a first groove and a second groove are provided on a side of the second pivot seat facing the first pivot seat, the first groove and the second groove being distributed about the rotation axis and having a dimension greater than a dimension of the second groove in a direction perpendicular to the rotation axis; a lock tooth, provided between the first pivot seat and the second pivot seat and connected to the first pivot seat, the lock tooth comprising a first tooth and a second tooth protruding in a direction perpendicular to the rotation axis, the length of the first tooth being greater than the length of the second tooth in the direction perpendicular to the rotation axis, the length of the first tooth being greater than the length of the second groove, the first tooth being adapted to cooperate with the first groove, and the second tooth being adapted to cooperate with the second groove and / or the first groove; In which, the locking tooth is configured to be able to move in a direction parallel to the rotation axis to a locked state or a released state. In the locked state, the second tooth moves in a direction parallel to the rotation axis to sink into the second groove and / or the first groove, and / or the first tooth moves in a direction parallel to the rotation axis to sink into the first groove, so as to limit the rotation of the second pivot seat relative to the first pivot seat. In the released state, both the first tooth and the second tooth move in a direction parallel to the rotation axis to disengage from the first groove and the second groove, so that the second pivot seat can rotate relative to the first pivot seat.

2. The stroller for children according to claim 1, wherein, The first grooves and the second grooves are alternately distributed around the circumference of the rotation axis.

3. The stroller for children according to claim 2, characterized in that, The plurality of first grooves are symmetrical about the center of the rotation axis, and the plurality of second grooves are symmetrical about the center of the rotation axis.

4. The stroller for children according to claim 3, wherein The locking tooth includes two first teeth, and the two first teeth are symmetrical about the plane where the rotation axis is located.

5. The stroller for children according to claim 4, wherein, The second pivot seat includes two third grooves, which are symmetrical about the plane where the rotation axis is located. Along the direction perpendicular to the rotation axis, the length of the third groove is greater than the length of the first tooth. Around the circumference of the rotation axis, the third groove is located between the alternating first grooves and the second grooves, and the third groove covers at least two of the second grooves.

6. The stroller for children according to claim 5, characterized in that, The second pivot seat has a height adjustment position. At the height adjustment position, the first tooth is located in the third groove, and the second tooth cooperates with the second groove or the second tooth cooperates with the first groove.

7. The stroller for children according to claim 1, wherein, The first pivot seat includes a chamfer, and the second pivot seat has an extreme position. At the extreme position, one side of the second pivot seat in the circumferential direction around the rotation axis abuts against the chamfer.

8. The stroller for children according to claim 1, characterized in that, The stroller also includes a spring. The first pivot seat is provided with a connecting column, which protrudes toward the second pivot seat. The spring is sleeved on the connecting column. The locking tooth abuts against the side of the spring facing the second pivot seat. The spring provides elastic force along the rotation axis to enable the locking tooth to enter the locked state.

9. The stroller for children according to claim 8, characterized in that, The locking tooth is provided with a fourth groove, the fourth groove is annular, and one end of the spring facing the second pivot seat is recessed into the fourth groove.

10. The stroller for children according to claim 1, wherein, The first pivot seat is provided with a mounting groove, the mounting groove matches the locking tooth, and the locking tooth is trapped in the mounting groove to be fixed relative to the first pivot seat in the circumferential direction along the rotation axis.

Images