Folding unlocking device and baby carriage

Abstract

The invention relates to the field of baby carriages, and discloses a folding unlocking device and a baby carriage, and the folding unlocking device comprises a first connecting joint, a second connecting joint, a third connecting joint, a first limiting tooth, a first spring, a transmission rope, a second limiting tooth, a second spring and a first transmission assembly. Through the arrangement of a rotary connecting structure of the first connecting joint, the second connecting joint and the third connecting joint, clamping locking of first limiting teeth and a first spring and elastic resetting of second limiting teeth and a second spring are combined; by means of the collaborative design that a transmission rope drives a first limiting tooth to be disengaged and a second transmission tooth is in linkage with the second limiting tooth through a first transmission assembly for unlocking, synchronous unlocking of a first connecting joint, a second connecting joint and a third connecting joint can be achieved by pulling the transmission rope once; the problems that an existing baby carriage is tedious in folding operation step and poor in linkage performance are solved.

Description

Technical Field

[0001] This application relates to the field of baby carriages, and particularly to a folding and unlocking device and a baby carriage. Background Art

[0002] As an important tool for infants' daily travel, the portability and space adaptability of baby carriages directly affect the user experience. At present, there are still significant deficiencies in the functional design of baby carriage products on the market: Some baby carriages adopt non-foldable fixed frames. Although they have high structural stability, they occupy a large amount of space when idle or in transportation. Especially in the case of narrow home storage environments or limited vehicle loading spaces, users often face difficulties in handling and high storage costs. In addition, such baby carriages are difficult to adapt to scenarios such as public transportation and long-distance travel, greatly limiting their application scope; Some existing baby carriages can be folded, but they require multiple operations to use, and the use effect is not ideal. Summary of the Invention

[0003] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and provide a folding and unlocking device and a baby carriage.

[0004] To achieve the above purpose, the technical solution adopted in this application is as follows:

[0005] This application provides:

[0006] A folding and unlocking device, the folding and unlocking device includes:

[0007] A first connecting joint;

[0008] A second connecting joint, the second connecting joint is rotatably connected to the first connecting joint and forms a first installation cavity therewith. A first transmission tooth is provided on the side of the second connecting joint away from the first connecting joint;

[0009] A third connecting joint, the third connecting joint is rotatably connected to the first connecting joint and forms a second installation cavity therewith. A second transmission tooth meshing with the first transmission tooth is provided on the side of the third connecting joint away from the first connecting joint;

[0010] A first limiting tooth, the first limiting tooth is provided in the first installation cavity and is clamped with the first connecting joint and the second connecting joint. A first spring is provided in the first installation cavity, and both ends of the first spring respectively abut against the first limiting tooth and the second connecting joint;

[0011] A transmission rope, the transmission rope is connected to the first limiting tooth and drives it to disengage from the first connecting joint against the elastic force of the first spring;

[0012] A second limiting tooth, which is arranged in a second installation cavity and is clamped with the first connecting joint and the third connecting joint. A second spring and a first transmission assembly are arranged in the second installation cavity. Two ends of the second spring respectively abut against the second limiting tooth and the first connecting joint. The first transmission assembly is arranged between the second limiting tooth and the second spring. The second transmission tooth drives the second limiting tooth to disengage from the third connecting joint through the first transmission assembly.

[0013] Further, the second connecting joint and the third connecting joint are arranged in parallel. First teeth and second teeth are circumferentially arranged on the side surface of the first connecting joint at the positions of the second connecting joint and the third connecting joint. A first rotating shaft and a second rotating shaft are respectively arranged at the central positions of the first teeth and the second teeth. The first limiting tooth is arranged on the first rotating shaft, and the second limiting tooth is arranged on the second rotating shaft. Third teeth and fourth teeth are respectively arranged on the end surfaces of the second connecting joint and the third connecting joint facing the first connecting joint. The first limiting tooth is clamped with the first teeth and the third teeth, and the second limiting tooth is clamped with the second teeth and the fourth teeth.

[0014] Further, the first transmission assembly includes a rotating part in transmission connection with the second transmission tooth. The second transmission tooth drives the rotating part to rotate. A transmission part is arranged between the second limiting tooth and the third connecting joint. One side of the transmission part abuts against the second limiting tooth. One end of the transmission part away from the second limiting tooth penetrates through an avoidance hole axially opened in the third connecting joint and abuts against the transmission part. The rotation of the rotating part drives the transmission part to axially move towards the second limiting tooth.

[0015] Further, the rotating part includes a driving ring. An inclined groove adapted to the transmission part is arranged on the inner circumferential surface of the driving ring. A first boss is arranged on the side surface of the driving ring facing the second transmission tooth. A transmission groove is arranged on the side surface of the second transmission tooth facing the driving ring. At least part of the first boss extends into the transmission groove. The transmission part includes a driven ring. At least one pushing block is arranged on the side surface of the driven ring facing the driving ring. The pushing block penetrates through the avoidance hole of the third connecting joint and abuts against the inclined groove.

[0016] Further, a first sliding groove is formed at the edge of the end face of the first connecting joint at the position of the first tooth towards the direction of the first transmission assembly. The folding and unlocking device further includes a first unlocking assembly. The first unlocking assembly includes a third spring disposed in the first sliding groove. One end of the third spring away from the first connecting joint is provided with a first slider, and the end of the third spring abuts against the first slider. A bevel is provided at the edge of the side face of the second connecting joint towards the first connecting joint. The end of the first slider away from the third spring abuts against the bevel. The second connecting joint drives the bevel to rotate circumferentially to drive the first slider to move circumferentially along the first connecting joint.

[0017] Further, a first locking assembly is provided on the first roller. The first locking assembly includes a first card slot provided on a first rotating frame of the first roller. A fourth spring is provided on a first mounting bushing of the first roller mounting frame. One end of the fourth spring towards the first card slot is provided with a first card block. The first card block extends into the first card slot under the elastic force of the fourth spring. The first card block is connected to a first pull rope. One end of the first pull rope away from the first card block is connected to the first slider.

[0018] Further, a second sliding groove is formed on the side face of the third connecting joint towards the second transmission tooth. The folding and unlocking device further includes a second unlocking assembly. The second unlocking assembly includes a second slider located in the second sliding groove. The second slider is connected to the unlocking end of the first roller. A pushing groove is formed at the end of the second transmission tooth towards the second slider. One end of the second slider towards the pushing groove is provided with a second boss. The second boss extends into the pushing groove. The rotation of the second transmission tooth drives the second slider to move in the second sliding groove through the transmission between the pushing groove and the second boss.

[0019] Further, a second locking assembly is provided on the second roller. The second locking assembly includes a second card slot provided on a second rotating frame of the second roller. A fifth spring is provided on a second mounting bushing of the second roller mounting frame. One end of the fifth spring towards the second card slot is provided with a second card block. The second card block extends into the second card slot under the elastic force of the fifth spring. The second card block is connected to a second pull rope. One end of the second pull rope away from the second card block is connected to the second slider.

[0020] Further, a receiving groove is formed at a side edge of the first connecting joint at the position of the second tooth at a direction towards the third connecting joint. A boosting component is arranged in the receiving groove. The boosting component includes a sixth spring and a third slider arranged in the receiving groove. The sixth spring abuts against the third slider and the inner wall of the receiving groove. A dial is arranged at a side edge of the third connecting joint at a direction towards the first connecting joint. The dial abuts against the third slider.

[0021] The present application further provides a baby carriage, which includes:

[0022] The folding and unlocking device according to any one of the above;

[0023] Two first foot tubes, each of the first foot tubes is connected to the corresponding first connecting joint. A first roller is arranged at an end of the first foot tube away from the first connecting joint. The first roller can rotate relative to the first foot tube;

[0024] Two second foot tubes, each of the second foot tubes is connected to the corresponding third connecting joint. A second roller is arranged at an end of the second foot tube away from the third connecting joint. The second roller can rotate relative to the second foot tube;

[0025] Two handle tubes, each of the handle tubes is connected to the corresponding second connecting joint;

[0026] A handle, which is connected to ends of the two handle tubes away from the second connecting joint;

[0027] A cross bar, which is located between the two first connecting joints. The cross bar is connected to the two first connecting joints.

[0028] By providing a rotational connection structure of the first connecting joint, the second connecting joint and the third connecting joint, combining the clamping and locking of the first limiting tooth and the first spring, the elastic reset of the second limiting tooth and the second spring, and the collaborative design of driving the first limiting tooth to disengage by a transmission rope and unlocking the second transmission tooth to drive the second limiting tooth through a first transmission component, the synchronous unlocking of the first connecting joint, the second connecting joint and the third connecting joint can be realized by pulling the transmission rope once, solving the problems of cumbersome folding operation steps and poor linkage of the existing baby carriage; meanwhile, the elastic reset characteristics of the first spring and the second spring ensure the reliable clamping of the first tooth and the third tooth, and the second tooth and the fourth tooth in the unfolded state, improving the use stability of the baby carriage; through the meshing transmission of the first transmission tooth and the second transmission tooth and the conversion of the rotational motion to the axial motion of the first transmission component, the synchronous rotational folding of the second connecting joint and the third connecting joint during the folding process is realized.

[0029] To make the above objects, features, and advantages of the present application more obvious and understandable, the following provides preferred embodiments in conjunction with the accompanying drawings and describes them in detail as follows. Brief Description of the Drawings

[0030] To more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can be obtained based on these drawings.

[0031] Figure 1 Shows the schematic diagram of the exploded state structure of the folding unlocking device of the present application;

[0032] Figure 2 Shows the schematic diagram of the meshing state of the first transmission gear and the second transmission gear of the present application;

[0033] Figure 3 Shows the schematic diagram of the connecting block and the transmission rope of the present application;

[0034] Figure 4 Shows the schematic diagram of the exploded state structure of the second connecting joint, the first limiting tooth, and the first spring of the present application;

[0035] Figure 5 Shows the schematic diagram of the exploded state structure of the first connecting joint, the third connecting joint, and the first transmission assembly of the present application;

[0036] Figure 6 Shows the schematic diagram of the exploded state structure of the third connecting joint and the second unlocking assembly of the present application;

[0037] Figure 7 Shows the schematic diagram of the exploded state structure of the second transmission gear, the rotating part, and the second unlocking assembly of the present application;

[0038] Figure 8 Shows the schematic diagram of the structure of the first connecting joint, the first unlocking assembly, and the boosting assembly of the present application;

[0039] Figure 9 Shows the schematic diagram of the second connecting joint of the present application;

[0040] Figure 10 Shows the steering schematic diagram of the baby carriage of the present application;

[0041] Figure 11 Shows the three-dimensional structure schematic diagram of the baby carriage of the present application;

[0042] Figure 12 Shows the schematic diagram of the folding process structure of the baby carriage of the present application.

[0043] Description of Main Component Symbols:

[0044] 100 - First connecting joint; 101 - First sliding groove; 102 - Receiving groove; 110 - First locking tooth; 120 - Second locking tooth; 200 - Second connecting joint; 210 - First driving tooth; 220 - Third locking tooth; 230 - Tapered platform; 300 - Third connecting joint; 301 - Second sliding groove; 310 - Second driving tooth; 311 - Driving groove; 312 - Pushing groove; 320 - Fourth locking tooth; 330 - Pushing block; 400 - First limiting tooth; 500 - First spring; 600 - Transmission rope; 610 - Connecting block; 620 - Pulling handle; 700 - Second limiting tooth; 800 - Second spring; 900 - First transmission assembly; 910 - Rotating part; 911 - Driving ring; 912 - First boss; 913 - Inclined groove; 920 - Transmission part; 921 - Driven ring; 922 - Pushing block; 1000 - First unlocking assembly; 1010 - First sliding block; 1020 - Third spring; 1100 - First locking assembly; 1101 - First clamping groove; 1110 - First clamping block; 1120 - Fourth spring; 1130 - First pulling rope; 1200 - Second unlocking assembly; 1210 - Second sliding block; 1220 - Second boss; 1300 - Second locking assembly; 1301 - Second clamping groove; 1310 - Second clamping block; 1320 - Fifth spring; 1330 - Second pulling rope; 1400 - Boosting assembly; 1410 - Sixth spring; 1420 - Third sliding block; a - First leg tube; a1 - First roller; b - Second leg tube; b1 - Second roller; c - Handle tube; d - Handle; e - Cross bar. Detailed Embodiment

[0045] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more unless otherwise specifically defined.

[0048] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.

[0050] An embodiment of this application provides a folding unlocking device, which includes a first connecting joint 100, a second connecting joint 200, a third connecting joint 300, a first limiting tooth 400, a first spring 500, a transmission rope 600, a second limiting tooth 700, a second spring 800, and a first transmission component 900.

[0051] Specifically, the second connecting joint 200 is rotatably connected to the first connecting joint 100 and forms a first installation cavity therewith. A first transmission tooth 210 is provided on the side of the second connecting joint 200 away from the first connecting joint 100. The third connecting joint 300 is rotatably connected to the first connecting joint 100 and forms a second installation cavity therewith. A second transmission tooth 310 meshing with the first transmission tooth 210 is provided on the side of the third connecting joint 300 away from the first connecting joint 100. A first limiting tooth 400 is provided in the first installation cavity and is clamped with the first connecting joint 100 and the second connecting joint 200. A first spring 500 is provided in the first installation cavity. Both ends of the first spring 500 respectively abut against the first limiting tooth 400 and the second connecting joint 200. A transmission rope 600 is connected to the first limiting tooth 400 and drives it to overcome the elastic force of the first spring 500 and disengage from the first connecting joint 100. A second limiting tooth 700 is provided in the second installation cavity and is clamped with the first connecting joint 100 and the third connecting joint 300. A second spring 800 and a first transmission assembly 900 are provided in the second installation cavity. Both ends of the second spring 800 respectively abut against the second limiting tooth 700 and the first connecting joint 100. The first transmission assembly 900 is provided between the second limiting tooth 700 and the second spring 800. The second transmission tooth 310 drives the second limiting tooth 700 to disengage from the third connecting joint 300 through the first transmission assembly 900.

[0052] Refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown in

[0053] Please continue to refer to Figure 1 , Figure 2 , Figure 4 and Figure 5As shown in the figure, when it is necessary to unlock and fold the frame of the baby carriage, the first limiting tooth 400 is driven by the transmission rope 600 to move towards the second connecting joint 200 against the elastic force of the first spring 500. As the first limiting tooth 400 moves away from the first connecting joint 100, the engaged state with the first connecting joint 100 is released. Until the first limiting tooth 400 completely disengages from the first connecting joint 100 to achieve unlocking. At this time, the first connecting joint 100 and the second connecting joint 200 are no longer engaged by the first limiting tooth 400. Therefore, the first connecting joint 100 and the second connecting joint 200 are unlocked at this time.

[0054] Next, when it is necessary to unlock between the first connecting joint 100 and the third connecting joint 300, the second connecting joint 200 can be rotated to drive the first transmission tooth 210 to rotate. Through the transmission of the first transmission tooth 210 and the second transmission tooth 310, while the first transmission tooth 210 rotates, the second transmission tooth 310 will also be driven to rotate. At the same time, the power is transmitted to the second limiting tooth 700 through the first transmission assembly 900. The first transmission assembly 900 drives the second limiting tooth 700 to move away from the third connecting joint 300 against the elastic force of the second spring 800 until the second spring 800 disengages from the third connecting joint 300. At this time, the first connecting joint 100 and the third connecting joint 300 are no longer engaged by the second limiting tooth 700. Then the first connecting joint 100 and the third connecting joint 300 are unlocked at this time.

[0055] In this embodiment, the first connecting joint 100 is unlocked from the second connecting joint 200 and the third connecting joint 300 by the axial movement of the first limiting tooth 400 and the second limiting tooth 700, preparing for the folding of the baby carriage.

[0056] Refer to Figure 1 and Figure 3 As shown in the figure, a connecting block 610 is connected to the end of the transmission rope 600 away from the first limiting tooth 400. The connecting block 610 is connected to the handle 620. When it is necessary to unlock the first connecting joint 100 and the second connecting joint 200, only by driving the connecting block 610 and the transmission rope 600 to move through the handle 620 can the unlocking be achieved.

[0057] Exemplarily, the transmission rope 600 can be made of materials with high strength and wear resistance such as steel wire ropes and nylon ropes. In practice, other materials can also be used, which are not specifically limited here.

[0058] The second connecting joint 200 and the third connecting joint 300 are arranged in parallel. On the circumferential side of the first connecting joint 100 at the positions of the second connecting joint 200 and the third connecting joint 300, a first locking tooth 110 and a second locking tooth 120 are arranged circumferentially. At the central positions of the first locking tooth 110 and the second locking tooth 120, a first rotating shaft and a second rotating shaft are respectively arranged. A first limiting tooth 400 is arranged on the first rotating shaft, and a second limiting tooth 700 is arranged on the second rotating shaft. On the end faces of the second connecting joint 200 and the third connecting joint 300 facing the first connecting joint 100, a third locking tooth 220 and a fourth locking tooth 320 are respectively arranged. The first limiting tooth 400 is engaged with the first locking tooth 110 and the third locking tooth 220, and the second limiting tooth 700 is engaged with the second locking tooth 120 and the fourth locking tooth 320.

[0059] Refer to Figure 1 , Figure 4 , Figure 5 and Figure 9 As shown, in order to enable the second limiting tooth 700 to be engaged with both the first connecting joint 100 and the second connecting joint 200, a first locking tooth 110 is provided on the first connecting joint 100 and a third locking tooth 220 is provided on the second connecting joint 200. It should be noted that both the first locking tooth 110 and the third locking tooth 220 are circumferentially distributed in a circular shape. And in order to prevent components such as the first limiting tooth 400 and the first spring 500 from shifting, a first rotating shaft is provided at the central position of the first locking tooth 110. The central hole of the first limiting tooth 400 is sleeved on the first rotating shaft, and the first spring 500 is also sleeved on the first rotating shaft. The second connecting joint 200 is rotationally connected to the first connecting joint 100 through the first rotating shaft; a second locking tooth 120 is provided on the first connecting joint 100 and a fourth locking tooth 320 is provided on the third connecting joint 300. The second locking tooth 120 and the fourth locking tooth 320 are coaxially arranged and are both circumferentially distributed in a circular shape. And a second rotating shaft is provided at the central position of the second locking tooth 120 of the first connecting joint 100. The second limiting tooth 700 and the second spring 800 are both sleeved on the second rotating shaft. The third connecting joint 300 is rotationally connected to the first connecting joint 100 through the second rotating shaft.

[0060] It can be understood that when the first limiting tooth 400 is driven by the transmission rope 600 to move axially, the first limiting tooth 400 is in a sliding connection with the first locking tooth 110 and the third locking tooth 220. Similarly, when the second limiting tooth 700 moves axially, the second limiting tooth 700 is in a sliding connection with the second locking tooth 120 and the fourth locking tooth 320.

[0061] The first transmission assembly 900 includes a rotating member 910 that is in transmission connection with the second transmission gear 310. The second transmission gear 310 drives the rotating member 910 to rotate. A transmission member 920 is provided between the second limiting gear 700 and the third connecting joint 300. One side of the transmission member 920 abuts against the second limiting gear 700. One end of the transmission member 920 away from the second limiting gear 700 passes through an avoidance hole axially opened in the third connecting joint 300 and abuts against the transmission member 920. The rotation of the rotating member 910 drives the transmission member 920 to axially move towards the second limiting gear 700.

[0062] Refer to Figure 5 and Figure 7 As shown, when unlocking between the first connecting joint 100 and the third connecting joint 300, in order to convert the rotational force from the second transmission gear 310 into a force to drive the second limiting gear 700 to axially move against the elastic force of the second spring 800, a rotating member 910 is provided between the third connecting joint 300 and the second transmission gear 310. It can be understood that the rotating member 910 can rotate following the second transmission gear 310, that is, the second transmission gear 310 can drive the rotating member 910 to rotate. The transmission member 920 is located between the third connecting joint 300 and the second limiting gear 700, and the end of the first transmission assembly 900 facing the second limiting gear 700 abuts against the second limiting gear 700. One end of the first transmission assembly 900 away from the second limiting gear 700 passes through an avoidance hole axially opened in the third connecting joint 300 and is in transmission connection with the rotating member 910. It can be understood that as the rotating member 910 rotates, it can drive the transmission member 920 to axially move towards the second limiting gear 700, that is, the cooperation between the rotating member 910 and the transmission member 920 can convert the rotational force into the axial moving force of the second limiting gear 700. Further, the rotation of the rotating member 910 drives the transmission member 920 to axially move, thereby driving the second limiting gear 700 to move away from the third connecting joint 300, and further enabling the second limiting gear 700 to disengage from the state of being engaged with the fourth locking tooth 320, realizing the unlocking between the first connecting joint 100 and the third connecting joint 300.

[0063] The rotating member 910 includes a driving ring 911. An inclined groove 913 adapted to the transmission member 920 is provided on the inner peripheral surface of the driving ring 911. A first boss 912 is provided on the side surface of the driving ring 911 facing the second transmission gear 310. A transmission groove 311 is provided on the side surface of the second transmission gear 310 facing the driving ring 911. At least a part of the first boss 912 extends into the transmission groove 311; the transmission member 920 includes a driven ring 921. At least one pushing block 922 is provided on the side surface of the driven ring 921 facing the driving ring 911, and the pushing block 922 passes through the avoidance hole of the third connecting joint 300 and abuts against the inclined groove 913.

[0064] Please continue to refer to Figure 5 andFigure 7 As shown, the rotating member 910 and the transmission member 920 are cooperated to convert the rotational force from the second transmission gear 310 into an axial driving force. An inclined groove 913 is formed on the inner wall of the driving ring 911, and the push block 922 abuts against the inclined groove 913 in the initial state. The inclined groove 913 has an inclined surface. When the second transmission gear 310 drives the driving ring 911 to rotate, the rotation of the driving ring 911 changes the contact position between the push block 922 and the inclined surface of the inclined groove 913, so that the position of the push block 922 in the axial direction also changes, and further the position of the driven ring 921 also changes. The driven ring 921 can overcome the elastic force of the second spring 800 to push the second limiting tooth 700 to move away from the fourth engaging tooth 320 until the second limiting tooth 700 releases the engaged state with the fourth engaging tooth 320.

[0065] Please continue to refer to Figure 7 As shown, in order to transmit the rotational power of the second transmission gear 310 to the driving ring 911, a first boss 912 is provided on the end surface of the driving ring 911 facing the second transmission gear 310, and a transmission groove 311 is formed on the end surface of the second transmission gear 310 facing the driving ring 911. The first boss 912 extends into the transmission groove 311 for engagement, so that when the second transmission gear 310 rotates, the rotational force can be transmitted to the driving ring 911 through the engagement between the transmission groove 311 and the first boss 912, thereby driving the driving ring 911 to rotate.

[0066] Refer to Figure 7 As shown, the driving ring 911 is annular. The inclined groove 913 can be formed on the inner wall of the driving ring 911 or on the end surface. In this embodiment, the inclined groove 913 is formed on the inner wall of the driving ring 911. In practice, it can be set according to needs and is not limited here.

[0067] In this embodiment, a first roller a1 and a second roller b1 are respectively rotatably installed at the lower ends of the first leg tube a and the second leg tube b, that is, the first roller a1 can rotate relative to the first leg tube a, and the second roller b1 can rotate relative to the second leg tube b. In the initial state, the first roller a1 can be used as the rear wheel and the second roller b1 can be used as the front wheel, with the tube c on the same side as the first roller a1. At this time, the first roller a1 cannot rotate relative to the first leg tube a, and the second roller b1 can rotate relative to the second leg tube b. The technical solution disclosed in the present application can reverse the tube c, that is, change the tube c from the state on the same side as the first leg tube a to the state on the same side as the second leg tube b, as described below and will not be elaborated here.

[0068] In this embodiment, in the initial state, the first roller a1 is locked, that is, the first roller a1 cannot rotate relative to the first leg tube a, and the second roller b1 is in an unlocked state, that is, the second roller b1 can rotate relative to the second leg tube b.

[0069] At the end face edge of the first connection joint 100 at the position of the first tooth 110 facing the first transmission assembly 900, a first chute 101 is provided. The folding unlocking device further includes a first unlocking assembly 1000. The first unlocking assembly 1000 includes a third spring 1020 disposed in the first chute 101. At the end of the third spring 1020 away from the first connection joint 100, a first slider 1010 is provided, and the end of the third spring 1020 abuts against the first slider 1010. On the side edge of the second connection joint 200 facing the first connection joint 100, a bevel 230 is provided. The end of the first slider 1010 away from the third spring 1020 abuts against the bevel 230. The second connection joint 200 drives the bevel 230 to rotate circumferentially to drive the first slider 1010 to move circumferentially along the first connection joint 100.

[0070] In this embodiment, the first roller a1 is disposed at the bottom of the first leg tube a, and the first roller a1 can rotate relative to the first leg tube a. A first locking assembly 1100 is provided on the first roller a1. The first locking assembly 1100 includes a first card slot 1101 provided on the first rotating frame of the first roller a1. A fourth spring 1120 is provided on the first mounting bushing of the mounting frame of the first roller a1. At the end of the fourth spring 1120 facing the first card slot 1101, a first card block 1110 is provided. The first card block 1110 extends into the first card slot 1101 under the elastic force of the fourth spring 1120. The first card block 1110 is connected to a first pull rope 1130. The end of the first pull rope 1130 away from the first card block 1110 is connected to the first slider 1010.

[0071] Refer to Figure 1 As shown, if the first pull rope 1130 is not under tension, the first card block 1110 is driven by the elastic force of the fourth spring 1120 to extend into the first card slot 1101. At this time, the first leg tube a is clamped with the mounting frame of the first roller a1, and further the first roller a1 cannot rotate relative to the first leg tube a, realizing the directional locking state of the first roller a1.

[0072] Refer to Figure 10 As shown, when the handle tube c needs to be turned, that is, the handle tube c changes from the state on the same side as the first leg tube a to the state on the same side as the second leg tube b.

[0073] Please refer to Figure 1 、 Figure 4 、 Figure 8 And Figure 9As shown, when unlocking the first roller a1, it is necessary to unlock the second connecting joint 200 first, so that the second connecting joint 200 can rotate relative to the first connecting joint 100. Specifically, by pulling the handle 620, the connecting block 610 and the transmission rope 600 are driven to move, so that the first limiting tooth 400 is disengaged from the state of being clamped with the first clamping tooth 110. At this time, the second connecting joint 200 and the first connecting joint 100 are no longer in the clamped state, enabling the second connecting joint 200 to rotate. Next, the second connecting joint 200 rotates counterclockwise, that is, the second connecting joint 200 rotates towards the second leg tube b. During this process, the inclined table 230 will abut against the first slider 1010 and drive the first sliding block 101 to slide in the first chute 101 against the elastic force of the third spring 1020. The movement of the first slider 1010 will pull the first pull rope 1130, and the first pull rope 1130 will drive the first clamping block 1110 at its end to move upward against the elastic force of the fourth spring 1120, so that the first clamping block 1110 disengages from the first clamping groove 1101 and thus releases the clamping state of the first roller a1 mounting bracket. At this time, the first roller a1 can rotate relative to the first leg tube a, realizing the unlocking of the first roller a1.

[0074] Referring to Figure 7 As shown, it should be noted that since the transmission groove 311 has a certain length, the first boss 912 will rotate a certain distance in the transmission groove 311 and will not drive the active ring 911 to rotate during the commutation process, that is, it will not drive the active ring 911 to rotate and drive the push block 922 to move axially to disengage the second limiting tooth 700 from the state of being clamped with the fourth clamping tooth 320. That is, when turning the tube c, the clamped state between the third connecting joint 300 and the first connecting joint 100 will not be released.

[0075] In this embodiment, there are two first rollers a1, that is, a first locking assembly 1100 needs to be provided at each position of the first roller a1. Further, a corresponding first unlocking assembly 1000 also needs to be provided. The detailed description of how to realize the rotation unlocking and directional locking of the first roller a1 is given above, and will not be elaborated here.

[0076] On the side of the third connecting joint 300 facing the second transmission gear 310, a second chute 301 is provided. The folding unlocking device further includes a second unlocking assembly 1200. The second unlocking assembly 1200 includes a second slider 1210 located in the second chute 301. The second slider 1210 is connected to the unlocking end of the first roller a1. At the end of the second transmission gear 310 facing the second slider 1210, a push groove 312 is provided. At the end of the second slider 1210 facing the push groove 312, a second boss 1220 is provided. The second boss 1220 extends into the push groove 312. The second transmission gear 310 rotates to drive the second slider 1210 to move in the second chute 301 through the transmission between the push groove 312 and the second boss 1220.

[0077] A second locking assembly 1300 is provided on the second roller b1. The second locking assembly 1300 includes a second card slot 1301 (not shown in the figure) provided on the second rotating frame of the second roller b1. A fifth spring 1320 is provided on the second mounting bushing of the mounting frame of the second roller b1. At the end of the fifth spring 1320 facing the second card slot 1301, a second card block 1310 is provided. The second card block 1310 extends into the second card slot 1301 under the elastic force of the fifth spring 1320. The second card block 1310 is connected to a second pull rope 1330. The end of the second pull rope 1330 away from the second card block 1310 is connected to the second slider 1210.

[0078] Please refer to Figure 1 As shown, in the initial state, the second roller b1 can rotate relative to the second leg tube b. When the tube c is reversed, the second roller b1 will gradually change from the unlocked state to the locked state.

[0079] Please refer to Figure 1 、 Figure 6 and Figure 7 As shown, in this embodiment, the depth of the push groove 312 is different at different positions. It can be understood that in the initial state, the second boss 1220 is located at a position where the groove depth is relatively shallow, so that the second boss 1220 can drive the second slider 1210 to move towards the second chute 301, that is, the second slider 1210 slides in the second chute 301. As the second slider 1210 moves, the second pull rope 1330 will be pulled, and the second pull rope 1330 will pull the second card block 1310 to move upward against the elastic force of the fifth spring 1320, so that the second card block 1310 disengages from the second card slot 1301, releasing the clamping state of the second roller b1.

[0080] In this embodiment, when the tube c needs to be reversed, as the tube c drives the second connecting joint 200 to rotate, the second driving gear 310 will be driven to rotate under the drive of the first driving gear 210. As the second driving gear 310 rotates, the second boss 1220 gradually transitions from the shallow position of the push groove 312 to the deep position of the groove. During this process, under the elastic force of the fifth spring 1320, the second latch 1310 will be driven to extend into the second card slot 1301. Further, under the elastic force of the fifth spring 1320, the second slider 1210 is driven to move towards the second driving gear 310 through the second pull rope 1330, thereby realizing the locking state of the second roller b1, that is, the directional locking state.

[0081] During the process of reversing the tube c as described above, under the drive of the first unlocking component 1000, the inclined platform 230, the second unlocking component 1200, and the push groove 312, the first roller a1 is changed from the locked state to the unlocked state, and the second roller b1 is changed from the unlocked state to the locked state.

[0082] In this embodiment, there are two second rollers b1. Correspondingly, a second locking component 1300 needs to be provided at each position of the second roller b1. Further, a corresponding second unlocking component 1200 also needs to be provided. The details of how to achieve directional locking and unlocking of the second roller b1 are described in detail above and will not be elaborated here.

[0083] In this embodiment, there are two second rollers b1, and the two second rollers b1 and the two first rollers a1 are distributed front and back. That is, when the second roller b1 is in the directional locking state, the first roller a1 is in the unlocked state, and when the second roller b1 is in the unlocked state, the first roller a1 is in the directional locking state. It can be understood that only one of the first roller a1 and the second roller b1 is in the unlocked or directional locking state, and the two cannot be in the unlocked state or the directional locking state at the same time. In this embodiment, a receiving groove 102 is formed at the side edge of the first connecting joint 100 at the position of the second tooth 120 facing the third connecting joint 300. A boosting component 1400 is arranged in the receiving groove 102. The boosting component 1400 includes a sixth spring 1410 and a third slider 1420 arranged in the receiving groove 102. The sixth spring 1410 abuts against the third slider 1420 and the inner wall of the receiving groove 102. A dial block 330 is arranged at the side edge of the third connecting joint 300 facing the first connecting joint 100, and the dial block 330 abuts against the third slider 1420.

[0084] In one embodiment, since the baby stroller usually uses the gravity of the stroller body itself to realize the rotation of each component when being folded for storage, when it is opened, due to the certain weight of each component of the stroller body itself, a certain force needs to be applied when opening. In order to reduce this force, a boosting component 1400 is provided at the position of the second cogs 120, thereby reducing the force required by the user when the baby stroller is unfolded.

[0085] Refer to Figure 1 、 Figure 5 and Figure 8 As shown, a receiving groove 102 is formed at the side edge of the first connecting joint 100. In this embodiment, the receiving groove 102 is arc-shaped. A sixth spring 1410 and a third slider 1420 are installed in the receiving groove 102, and the two end parts of the third slider 1420 respectively abut against the sixth spring 1410 and the inner wall of the receiving groove 102, and the dial block 330 abuts against the third slider 1420. Further, when the baby stroller is folded for storage, the elastic force of the sixth spring 1410 is overcome, and the dial block 330 is made to abut against the third slider 1420 by the rotation of the third connecting joint 300 so that it slides in the receiving groove 102, thereby completing the folding. When the baby stroller is unfolded, the third slider 1420 is driven to slide in the receiving groove 102 under the action of the elastic force of the sixth spring 1410, and the elastic force of the sixth spring 1410 acts on the dial block 330 and is further transmitted to the third connecting joint 300, so that the third connecting joint 300 rotates away from the second connecting joint 200, thereby reducing the force required by the user when the baby stroller is unfolded.

[0086] The embodiment of the present application further provides a baby stroller, which includes any one of the above folding and unlocking devices, two first foot tubes a, two second foot tubes b, two handle tubes c, a handle d, and a cross bar e.

[0087] Specifically, the first foot tube a is connected to its corresponding first connecting joint 100. A first roller a1 is provided at the end of the first foot tube a away from the first connecting joint 100, and the first roller a1 can rotate relative to the first foot tube a. The second foot tube b is connected to its corresponding third connecting joint 300. A second roller b1 is provided at the end of the second foot tube b away from the third connecting joint 300, and the second roller b1 can rotate relative to the second foot tube b. The handle tube c is connected to its corresponding second connecting joint 200. The handle d is connected to the ends of the two handle tubes c away from the second connecting joint 200. The cross bar e is located between the two first connecting joints 100, and the cross bar e is connected to the two first connecting joints 100.

[0088] Refer to Figure 1 、 Figure 10 、 Figure 11 and Figure 12As shown, in this embodiment, when the entire stroller needs to be folded, first, the folding unlocking device is used to release the clamping state between the second connecting joint 200, the third connecting joint 300 and the first connecting joint 100, so that both the second connecting joint 200 and the third connecting joint 300 can rotate relative to the first connecting joint 100. Then, the first foot tube a and the second foot tube b rotate towards each other, and the tube c rotates towards the first foot tube a, thus realizing the folding.

[0089] It should be noted that during the folding process, the handle 620 needs to be continuously pulled to drive the first limiting tooth 400 to be in a state of releasing the clamping with the first engaging tooth 110 through the connecting block 610 and the transmission rope 600. When the folding is completed, the force applied to the handle 620 can be released. At this time, under the elastic force of the first spring 500, the first limiting tooth 400 is re-engaged with the first engaging tooth 110. At this time, the second connecting joint 200 and the first connecting joint 100 are clamped to maintain their positions. And because the first transmission tooth 210 is engaged with the second transmission tooth 310, the position of the third connecting joint 300 and the second connecting joint 200 also remains unchanged at this time. As a result, the positions among the first connecting joint 100, the second connecting joint 200 and the third connecting joint 300 remain unchanged, and thus the phenomenon of the stroller automatically unfolding will not occur. It can be understood that when unfolding is required, the handle 620 needs to be pulled again to drive the first limiting tooth 400 to axially move against the elastic force of the first spring 500 through the connecting block 610 and the transmission rope 600, releasing the clamping state between the first limiting tooth 400 and the first engaging tooth 110, and then releasing the clamping state between the second connecting joint 200 and the first connecting joint 100 to perform the unfolding process. The unfolding process can refer to the content described above and will not be elaborated in detail here.

[0090] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0091] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A folding unlocking device, characterized in that: include: First connection joint; a second connecting joint, the second connecting joint being rotatably connected to the first connecting joint and forming a first mounting cavity therewith, and a first transmission tooth being disposed on a side of the second connecting joint away from the first connecting joint; a third connecting joint, the third connecting joint being rotatably connected to the first connecting joint and forming a second mounting cavity therewith, and a second transmission tooth meshing with the first transmission tooth being provided on a side of the third connecting joint away from the first connecting joint; a first limiting tooth, the first limiting tooth is arranged in the first installation cavity and is clamped with the first connecting joint and the second connecting joint, a first spring is arranged in the first installation cavity, and two ends of the first spring abut against the first limiting tooth and the second connecting joint respectively; A transmission rope, the transmission rope is connected to the first limiting tooth and drives it to overcome the elastic force of the first spring and disengage from the first connection joint; A second limiting tooth, the second limiting tooth is arranged in the second installation cavity and is clamped with the first connecting joint and the third connecting joint, a second spring and a first transmission assembly are arranged in the second installation cavity, two ends of the second spring respectively abut against the second limiting tooth and the first connecting joint, the first transmission assembly is arranged between the second limiting tooth and the second spring, and the second transmission tooth drives the second limiting tooth to disengage from the third connecting joint through the first transmission assembly.

2. The folding unlocking device according to claim 1, characterized in that: The second connecting joint and the third connecting joint are arranged in parallel; the side surface of the first connecting joint at the position of the second connecting joint and the third connecting joint is circumferentially provided with a first latching tooth and a second latching tooth, and the first rotating shaft and the second rotating shaft are respectively provided at the center position of the first latching tooth and the second latching tooth, the first limiting tooth is arranged on the first rotating shaft, the second limiting tooth is arranged on the second rotating shaft, the end surfaces of the second connecting joint and the third connecting joint facing the direction of the first connecting joint are respectively provided with a third latching tooth and a fourth latching tooth, the first limiting tooth is engaged with the first latching tooth and the third latching tooth, and the second limiting tooth is engaged with the second latching tooth and the fourth latching tooth.

3. The folding unlocking device according to claim 2, characterized in that: The first transmission assembly includes a rotating member connected to the second transmission tooth, the second transmission tooth drives the rotating member to rotate, a transmission member is arranged between the second limiting tooth and the third connection joint, one side of the transmission member abuts against the second limiting tooth, an end of the transmission member away from the second limiting tooth is penetrated by an avoidance hole axially opened in the third connection joint and abuts against the transmission member, and the rotating member rotates to drive the transmission member to move axially toward the second limiting tooth.

4. The folding unlocking device according to claim 3, characterized in that: The rotating member includes an active ring, an inner circumferential surface of which is provided with an oblique groove adapted to the transmission member, a side of the active ring facing the second transmission tooth is provided with a first boss, a side of the second transmission tooth facing the active ring is provided with a transmission groove, and the first boss at least partially extends into the transmission groove; the transmission member includes a driven ring, a side of the driven ring facing the active ring is provided with at least one push block, and the push block passes through the avoidance hole of the third connecting joint and abuts against the oblique groove.

5. The folding unlocking device according to claim 4, characterized in that: A first sliding groove is provided at the end face edge of the first connecting joint at the first locking tooth position facing the first transmission component, the folding unlocking device also includes a first unlocking component, the first unlocking component includes a third spring arranged in the first sliding groove, a first slider is provided at the end of the third spring away from the first connecting joint, and the end of the third spring abuts against the first slider, a ramp is provided at the side edge of the second connecting joint towards the first connecting joint, the end of the first slider away from the third spring abuts against the ramp, and the second connecting joint drives the ramp to rotate circumferentially to drive the first slider to move circumferentially along the first connecting joint.

6. The folding unlocking device according to claim 5, characterized in that: A first locking assembly is provided on the first roller, and the first locking assembly includes a first slot provided on the first rotating frame of the first roller, a fourth spring is provided on the first mounting sleeve of the first roller mounting frame, a first clamping block is provided at the end of the fourth spring facing the first slot, the first clamping block extends into the first slot under the elastic force of the fourth spring, the first clamping block is connected to a first pull rope, and the end of the first pull rope away from the first clamping block is connected to the first slider.

7. The folding unlocking device according to claim 1, characterized in that: A second slide groove is provided on the side of the third connecting joint facing the direction of the second transmission tooth, and the folding unlocking device also includes a second unlocking component, and the second unlocking component includes a second slider located in the second slide groove, and the second slider is connected to the unlocking end of the first roller, and a push groove is provided on the end of the second transmission tooth facing the direction of the second slider, and a second boss is provided on the end of the second slider facing the direction of the push groove, and the second boss extends into the push groove, and the second transmission tooth rotates through the push groove and the second boss to drive the second slider to move in the second slide groove.

8. The folding unlocking device according to claim 7, characterized in that: The second roller is provided with a second locking assembly, and the second locking assembly includes a second slot arranged on the second rotating frame of the second roller, and a fifth spring is arranged on the second mounting sleeve of the second roller mounting frame, and a second clamping block is arranged at the end of the fifth spring facing the second slot, and the second clamping block extends into the second slot under the elastic force of the fifth spring, and the second clamping block is connected to a second pull rope, and the end of the second pull rope away from the second clamping block is connected to the second slider.

9. The folding unlocking device according to claim 2, characterized in that: A receiving groove is provided at the side edge of the first connecting joint at the second locking tooth position toward the third connecting joint, and a power assist assembly is arranged in the receiving groove. The power assist assembly includes a sixth spring and a third sliding block arranged in the receiving groove, and the sixth spring abuts against the third sliding block and the inner wall of the receiving groove. A shift block is provided at the side edge of the third connecting joint toward the first connecting joint, and the shift block abuts against the third sliding block.

10. A baby carriage, characterized in that: include: The folding unlocking device according to any one of claims 1 to 9; Two first leg tubes, wherein the first leg tubes are connected to the first connecting joints corresponding to the first leg tubes, and first rollers are arranged at the ends of the first leg tubes away from the first connecting joints, and the first rollers can rotate relative to the first leg tubes; Two second leg tubes, wherein the second leg tubes are connected to the corresponding third connection joints, and second rollers are arranged at the ends of the second leg tubes away from the third connection joints, and the second rollers can rotate relative to the second leg tubes; two handlebars, each handlebar being connected to its corresponding second connecting joint; A handle, the handle being connected to ends of the two handlebars away from the second connection joint; A cross bar, wherein the cross bar is located between the two first connection joints and is connected to the two first connection joints.

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