stroller
The baby stroller design addresses seat post instability and cumbersome folding by incorporating a guide column and locking mechanisms, enhancing user experience and convenience through stable folding and compact size.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- GOODBABY CHILD PROD CO LTD
- Filing Date
- 2022-11-30
- Publication Date
- 2026-07-22
AI Technical Summary
Conventional baby strollers face issues such as the seat post bending upwards during push bar inversion, cumbersome folding processes, and large volume after folding, which affect the child's experience and convenience.
A baby stroller design featuring a frame with side brackets, a push bar with a sliding groove, a folding pull rod with a guide column, and locking devices that allow seamless conversion between forward and rearward configurations, ensuring the seat post stability and facilitating easy folding.
Prevents the seat post from moving up and down during push bar inversion, enables simple folding in both forward and reverse positions, and reduces the stroller's volume for easy carrying.
Smart Images
Figure 0007893978000001 
Figure 0007893978000002 
Figure 0007893978000003
Abstract
Description
Cross-reference to related patent applications
[0001] This application claims priority to Chinese Patent Application No. CN2022111583516, filed on September 22, 2022.
Technical Field
[0002] The present invention belongs to the field of baby products, and specifically relates to a baby stroller.
Background Art
[0003] Baby strollers play an important role for users to carry infants in daily life and are one of the essential baby products in the process of children's growth. Most of the conventional baby strollers can be inverted and folded, but during the inversion of the push bar, the seat post is likely to bend upwards, affecting the child's experience. Moreover, the volume of the folded baby stroller is large, and the folding process is relatively simple and cumbersome.
Summary of the Invention
Problems to be Solved by the Invention
[0004] In order to solve the above technical problems, the present invention aims to provide an improved baby stroller in which the seat post does not move up and down during the inversion of the push bar, improving the child's experience, having a small volume after folding, and a simple folding process.
Means for Solving the Problems
[0005] A baby stroller comprising a frame having a deployed state and a folded state and provided with side brackets located on the left and right sides respectively, a front wheel assembly, and a rear wheel assembly, In the deployed state, the side bracket a front wheel bracket provided with the front wheel assembly at the lower part, A rear wheel bracket on which the rear wheel assembly is provided at the lower part, A push bar whose lower end is connected to the upper end of the front wheel bracket and the upper end of the rear wheel bracket so as to be rotatable toward each other, and which has a sliding groove in its lower end, A seat post used to connect a child's seat, the front end of which is pivotably connected to the front wheel bracket, A rear link whose front end is pivotably connected to the seat post and whose rear end is pivotably connected to the rear wheel bracket, A folding pull rod whose lower end is pivotably connected to the seat post and / or the rear link, and whose upper end is provided with a guide column into which the guide column is inserted into the slide groove, A first locking device having a locking operation state that prevents the push bar from rotating relative to the front wheel bracket and / or the rear wheel bracket, and an unlocking operation state that allows the push bar to rotate relative to the front wheel bracket and / or the rear wheel bracket, The stroller has a forward-facing and a rearward-facing configuration. When the first locking device is in the unlocked state, the push bar rotates forward or backward relative to the front wheel bracket and rear wheel bracket so that the stroller can switch between the rearward-facing and forward-facing configurations. During the conversion between the rearward-facing and forward-facing configurations, the upper end of the folding pull rod and the lower end of the push bar are connected to each other so as to slide and rotate oppositely along the slide groove. In the rearward-facing configuration, when the first locking device is in the unlocked state, the frame is allowed to switch from the unfolded state to the folded state. In the forward-facing configuration, when the first locking device is in the unlocked state, the frame is allowed to switch from the unfolded state to the folded state.
[0006] In some embodiments, the lower end of the push bar is connected to the upper end of the front wheel bracket and the upper end of the rear wheel bracket so as to be mutually opposed and rotatable. For example, two of the three members of the lower end of the push bar, the upper end of the front wheel bracket, and the upper end of the rear wheel bracket are pivotally connected via one pivot, and the third member is pivotally connected to one of the two aforementioned members via the other pivot.
[0007] In some other embodiments, the lower end of the push bar is pivotably connected to the upper end of the front wheel bracket and the upper end of the rear wheel bracket via a central rotating shaft.
[0008] In some embodiments, the lower end of the push bar is pivotally connected coaxially to the upper end of the front wheel bracket and the upper end of the rear wheel bracket via a central rotating shaft, the slide groove is located below the central rotating shaft, and the slide groove has an end that moves away from the central rotating shaft and an end that moves closer to the central rotating shaft.
[0009] In some embodiments, the longitudinal direction of the slide groove extends in the radial direction of the central rotating shaft.
[0010] In some embodiments, a guide groove is provided at the upper end of the rear wheel bracket, which is located around the central rotating shaft.
[0011] In some embodiments, the ends of the guide groove are a first entrance end and a second entrance end, respectively, and in the forward-facing use state, the guide column is located at the first entrance end, and in the forward-facing use state, during the conversion of the frame from the unfolded state to the folded state, the guide column does not slide within the slide groove, but enters the guide groove from the first entrance end and slides along the guide groove, and in the rearward-facing use state, the guide column is located at the second entrance end, and in the rearward-facing use state, during the conversion of the frame from the unfolded state to the folded state, the guide column does not slide within the slide groove, but enters the guide groove from the second entrance end and slides along the guide groove.
[0012] At both ends of the guide groove, a first entrance end and a second entrance end are provided, respectively, to allow the stroller to be folded whether it is facing forward or backward, and to facilitate operation.
[0013] In some embodiments, the upper end of the rear wheel bracket between the first and second entrance ends has a notch, which is used in the process of the stroller switching between rear-facing and forward-facing use, and the guide column moves within the notch.
[0014] In some embodiments, the first locking device is A locking tab is provided within the internal cavity at the lower part of the push bar so as to be slidable along the length of the push bar, and an elastic part is provided between it and the push bar to contact it. A front lock hole is provided in the upper end of the front wheel bracket or the upper end of the rear wheel bracket, with the direction of the opening being the radial direction of the central rotating shaft, and when the stroller is in the forward-facing use state, the locking tab is inserted into the front lock hole and the first locking device is in the locked state, A rear lock hole is provided in the upper end of the front wheel bracket or the upper end of the rear wheel bracket, with the direction of the opening being the radial direction of the central rotating shaft, and when the stroller is in the rearward-facing position, the locking tab is inserted into the rear lock hole and the first locking device is in the locked position, The device includes a locking tongue drive component connected to the locking tongue, which, after the locking tongue is pulled so as to disengage from the front lock hole or the rear lock hole, puts the first locking device in an unlocked state, and the elastic part applies elastic force to the locking tongue, causing the locking tongue to tend to be inserted into the front lock hole or the rear lock hole.
[0015] In some embodiments, the front end of the seatpost and the front wheel bracket are pivotably connected via a first rotation shaft, the first rotation shaft being located below the central rotation shaft. The front end of the rear link is pivotably connected to the seat post via a second rotating shaft, the second rotating shaft being located behind the first rotating shaft, and the rear end of the rear link is pivotably connected to the rear wheel bracket via a third rotating shaft, the third rotating shaft being located below the central rotating shaft. The lower end of the folding pull rod is pivotably connected to the seat post and / or the rear link via a fourth rotating shaft, and the guide column is located below the central rotating shaft.
[0016] In some embodiments, the fourth rotating shaft and the second rotating shaft are the same common rotating shaft with coincident axes, and the lower end of the folding pull rod is coaxially and pivotably connected to the front end of the rear link and the seat post via the common rotating shaft.
[0017] In some embodiments, the side bracket further includes a second locking device provided between the front wheel bracket and the rear wheel bracket. The second locking device has a locked state and an unlocked state. In the locked state, the frame is locked in the deployed state. When both the first locking device and the second locking device are in the unlocked state, the baby stroller is allowed to be converted from the deployed state to the folded state in the rearward use state, and the baby stroller is also allowed to be converted from the deployed state to the folded state in the forward use state.
[0018] In some embodiments, a tie rod is connected between the side brackets on both the left and right sides.
[0019] A folding method for a baby stroller, when both the first locking device and the second locking device are in the unlocked state, operate so that the baby stroller can be converted from the deployed state to the folded state whether in the rearward use state or the forward use state.
Advantages of the Invention
[0020] When the present invention uses the above solutions, it has the following advantages compared with the prior art.
[0021] The baby stroller in the present invention adds a guide column to the upper part of the folding pull rod, so that the seat post does not move up and down during the inversion of the push bar, improving the child's experience. The baby stroller can be folded in both the forward use state and the reverse use state. The folding process is simple, and the volume of the folded baby stroller is small, making it convenient to carry.
[0022] To more clearly illustrate the technical solutions of the present disclosure, the following briefly describes the attached drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and those skilled in the art can also obtain other drawings from these drawings without creative efforts.
Brief Description of the Drawings
[0023] [Figure 1] It is a perspective view of the stroller in the forward-facing usage state of the embodiment of the present invention. [Figure 2] It is a side view of the stroller in the forward-facing usage state of the embodiment of the present invention. [Figure 3] It is a schematic cross-sectional view taken along the A-A direction in FIG. 2. [Figure 4] It is a plan view of the stroller in the forward-facing usage state of the embodiment of the present invention. [Figure 5] It is a schematic cross-sectional view taken along the B-B direction in FIG. 4. [Figure 6] It is a side view of the stroller of the embodiment of the present invention when it is between the forward-facing usage state and the backward-facing usage state. [Figure 7] It is a schematic cross-sectional view taken along the C-C direction in FIG. 6. [Figure 8] It is a plan view of the stroller of the embodiment of the present invention when it is between the forward-facing usage state and the backward-facing usage state. [Figure 9] It is a schematic cross-sectional view taken along the D-D direction in FIG. 8. [Figure 10] It is a side view of the stroller in the backward-facing usage state of the embodiment of the present invention. [Figure 11] ]>It is a schematic cross-sectional view taken along the E-E direction in FIG. 10. [Figure 12] It is a plan view of the stroller in the backward-facing usage state of the embodiment of the present invention. [[ID=:41]] [Figure 13] It is a schematic cross-sectional view taken along the F-F direction in FIG. 12. [Figure 14] It is a side view of the stroller of the embodiment of the present invention in the half-folded state (here, the push bar is in the forward-facing usage state). [Figure 15] It is a plan view of the stroller of the embodiment of the present invention in the half-folded state (here, the push bar is in the forward-facing usage state). [Figure 16] It is a schematic cross-sectional view taken along the G-G direction in FIG. 15. [Figure 17] This is a side view of the stroller according to an embodiment of the present invention in a semi-folded state (where the push bar is in the reverse direction). [Figure 18] This is a plan view of the stroller according to an embodiment of the present invention in a semi-folded state (where the push bar is in the reverse direction). [Figure 19] Figure 18 shows a schematic cross-sectional view along the HH direction. [Figure 20] This is a side view of the stroller according to an embodiment of the present invention in its folded state (where the push bar is in the forward-facing position). [Figure 21] This is a plan view of the stroller according to an embodiment of the present invention in its folded state (where the push bar is in the forward-facing position). [Figure 22] Figure 21 shows a schematic cross-sectional view along the direction II. [Figure 23] This is a side view of the stroller according to an embodiment of the present invention in its folded state (where the push bar is in the reverse direction). [Figure 24] This is a plan view of the stroller according to an embodiment of the present invention in its folded state (where the push bar is in the reverse direction). [Figure 25] Figure 24 shows a schematic cross-sectional view along the JJ direction. [Figure 26] This is a cross-sectional view of the first locking device of a stroller according to an embodiment of the present invention (where the push bar is in the forward operating position). [Figure 27] Figure 26 is a localized, enlarged schematic diagram of section A. [Figure 28] This is a cross-sectional view of the first locking device of a stroller according to an embodiment of the present invention (where the push bar is in the reverse direction). [Figure 29] Figure 28 is a localized, enlarged schematic diagram of section B. [Figure 30] This is a cross-sectional view of the second locking device of a stroller according to an embodiment of the present invention. [Figure 31]Figure 30 shows a schematic cross-sectional view along the KK direction (where the second locking device is in the locked state). [Figure 32] Figure 30 shows a schematic cross-sectional view along the KK direction (where the second locking device is in the unlocked state). [Modes for carrying out the invention]
[0024] The present invention will be further described below with reference to examples. However, the present invention is not limited to the following examples. The conditions of implementation adopted in the examples can be further adjusted according to different requirements of specific use, and conditions of implementation not explicitly stated are general conditions in the industry. The technical features of the various embodiments of the present invention can be combined with each other, insofar as they do not conflict with each other.
[0025] The following briefly describes some exemplary embodiments. As those skilled in the art will understand, the embodiments described can be modified in various different ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are to be considered illustrative and not restrictive in nature.
[0026] Furthermore, the terms “first” and “second” are used merely to describe the purpose and cannot be understood as indicating or implying relative importance or the number of designated technical features. Thus, “first” and “second” may explicitly or implicitly indicate that the designated feature includes one or more such features. In the description of embodiments of the present invention, “multiple” means two or more unless otherwise clearly specified.
[0027] In embodiments of the present invention, unless otherwise explicitly stated or limited, the presence of a first feature "above" or "below" a second feature may include direct contact between the first and second features, or it may include contact between them by other features rather than direct contact between them. The presence of a first feature "above," "above," and "on the top surface" of a second feature may include the first feature being directly above or diagonally above the second feature, or simply indicating that the horizontal height of the first feature is greater than that of the second feature. The presence of a first feature "below," "below," and "on the bottom surface" of a second feature may include the first feature being directly below or diagonally below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.
[0028] The following disclosure provides and implements various embodiments or examples to realize different structures of the embodiments of the present invention. To simplify the disclosure of embodiments of the present invention, the components and installations of specific examples are described below. Of course, the following are merely examples and are not intended to limit embodiments of the present invention. Also, embodiments of the present invention may repeat reference numbers and / or reference letters in different examples, and such repetitions are for the purpose of simplification and clarification and do not in themselves indicate relationships between the various embodiments and / or installations discussed.
[0029] In the description of this invention, directions such as "front," "back," "left," "right," "up," and "down" are all defined with reference to the direction a child observes when sitting. As shown in Figure 2, the left side of the figure is "front," the right side is "back," the upper side is "up," the lower side is "down," and the direction perpendicular to the field of view is the left-right direction. The above definitions of directions are merely for the purpose of facilitating and simplifying the description of this invention, and do not indicate or suggest that the devices or elements mentioned must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting this invention.
[0030] As shown in Figures 1 to 32, the stroller of this embodiment comprises a frame 1 having an unfolded state and a folded state, a front wheel assembly 2 and a rear wheel assembly 3, where the frame 1 is provided with side brackets 11 located on both the left and right sides, and a tie rod 4 is connected between the two side brackets 11.
[0031] The following provides a detailed explanation of the stroller's specific structure and the connections between its various assemblies.
[0032] In this embodiment, as shown in Figures 1 to 13, the side bracket 11, in its unfolded state, comprises a front wheel bracket 111, a rear wheel bracket 112, a push bar 113, a seat post 114, a rear link 115, and a folding pull rod 116. Here, the front wheel assembly 2 is provided at the lower part of the front wheel bracket 111, and the rear wheel assembly 3 is provided at the lower part of the rear wheel bracket 112. The lower end of the push bar 113 is rotatably connected to the upper end of the front wheel bracket 111 and the upper end of the rear wheel bracket 112, for example, two of the three members—the lower end of the push bar 113, the upper end of the front wheel bracket 111, and the upper end of the rear wheel bracket 112—are rotatably connected via one pivot, and the third member is rotatably connected to one of the two aforementioned parts via the other pivot. In some other embodiments, the lower end of the push bar 113 is pivotally connected to the upper end of the front wheel bracket 111 and the upper end of the rear wheel bracket 112, and preferably in this embodiment, the lower end of the push bar 113 is coaxially pivotally connected to the upper end of the front wheel bracket 111 and the upper end of the rear wheel bracket 112 via a central rotating shaft 1131 (i.e., the rotating shaft between the push bar 113 and the front wheel bracket 111 and the rotating shaft between the push bar 113 and the rear wheel bracket 112 are the same rotating shaft). As shown in Figures 2 and 6, the lower end of the push bar 113 has a portion below the central rotating shaft 1131, and a sliding groove 1132 is provided in this portion of the push bar 113, the sliding groove 1132 having a first end 11321 away from the central rotating shaft 1131 and a second end 11322 approaching the central rotating shaft 1131. The seatpost 114 is used to connect the seat on which the child sits, and the front end of the seatpost 114 is pivotably connected to the front wheel bracket 111 via a first rotation shaft 1111, which is located below the central rotation shaft 1131.The front end of the rear link 115 is pivotably connected to the seat post 114 via a second rotation shaft 1151, which is located behind the first rotation shaft 1111. The rear end of the rear link 115 is pivotably connected to the rear wheel bracket 112 via a third rotation shaft 1121, which is located below the central rotation shaft 1131. The lower end of the folding pull rod 116 is pivotably connected to the seat post 114 and the rear link 115 via a fourth rotating shaft 1161, the fourth rotating shaft 1161 and the second rotating shaft 1151 being a common rotating shaft with coincident axes, and the lower end of the folding pull rod 116 is pivotably connected coaxially to the front end of the rear link 115 and the seat post 114 via a common rotating shaft (i.e., the rotating shafts 1151 or 1161). In some other embodiments, the lower end of the folding pull rod 116 may be pivotably connected to either the seat post 114 or the rear link 115. The upper end of the folding pull rod 116 is provided with a guide column 1162, which is inserted into a slide groove 1132 and is located below the central rotating shaft 1131. The longitudinal direction of the slide groove 1132 extends radially to the central rotating shaft 1131.
[0033] The side bracket 11 further comprises a first locking device 117, as shown in Figures 26 to 29, the first locking device 117 specifically comprises a locking tongue 1171, an elastic part 1172, a rear locking hole 1173, a front locking hole 1174, and a locking tongue drive component 1175, and the first locking device 117 has a locked operating state and an unlocked operating state, in the locked operating state, the push bar 113 is prohibited from rotating relative to the front wheel bracket 111 or the rear wheel bracket 112, and in some other embodiments, the push bar 113 is prohibited from rotating simultaneously relative to the front wheel bracket 111 and the rear wheel bracket 112, and in some other embodiments, the push bar 113 is permitted to rotate oppositely relative to the front wheel bracket 111 or the rear wheel bracket 112.
[0034] The stroller has a forward-facing and a rearward-facing configuration. When the first locking device 117 is in the unlocked position, the push bar 113 rotates forward or backward relative to the front wheel bracket 111 and rear wheel bracket 112 so that the stroller can switch between the rearward-facing and forward-facing configurations. During the conversion between the rearward-facing and forward-facing configurations, the upper end of the folding pull rod 116 and the lower end of the push bar 113 are connected to each other so as to slide and rotate along the slide groove 1132. Specifically, the guide column 1162 slides in the slide groove 132. In the rearward-facing configuration, when the first locking device 117 is in the unlocked position, the frame 1 is allowed to switch from the unfolded to the folded position. In the forward-facing configuration, when the first locking device 117 is in the unlocked position, the frame 1 is allowed to switch from the unfolded to the folded position.
[0035] Specifically, the locking tab 1171 is slidably mounted within the internal cavity at the bottom of the push bar 113 along the length of the push bar 113, and an elastic part 1172 that abuts against the locking tab 1171 is provided between the locking tab 1171 and the push bar 113, the front locking hole 1174 is opened at the upper end of the front wheel bracket 111 or the upper end of the rear wheel bracket 112, the direction of opening of the front locking hole 1174 is the radial direction of the central rotation shaft 1131, and when the stroller is in a forward-facing position, as shown in Figures 26 and 27, the locking tab 1171 is inserted into the front locking hole 1174 and the first locking device 117 is in a locked state, and the rear locking hole 1173 is to the upper end of the front wheel bracket 111 Alternatively, the rear lock hole 1173 is opened at the upper end of the rear wheel bracket 112, and the direction of the opening of the rear lock hole 1173 is radial to the central rotating shaft 1131. When the stroller is in rearward-facing use, as shown in Figures 28 and 29, the locking tongue 1171 is inserted into the rear lock hole 1173, the first locking device 117 is in the locked state, the locking tongue drive component 1175 is connected to the locking tongue 1171, and after the locking tongue drive component 1175 pulls the locking tongue 1171 out of the front lock hole 1174 or the rear lock hole 1173, the first locking device 117 is in the unlocked state, the elastic part 1172 applies elastic force to the locking tongue 1171, causing the locking tongue 1171 to tend to be inserted into the front lock hole 1174 or the rear lock hole 1173.
[0036] A guide groove 118, which is partially arc-shaped, is provided at the upper end of the rear wheel bracket 112. The guide groove 118 is provided around the central rotating shaft 1131, and both ends of the guide groove 118 are the first inlet end 1181 and the second inlet end 1182, respectively. As shown in Figures 2 to 5, in the forward-facing use state, the guide column 1162 is located at the first inlet end 1181 and at the first end 11321 of the slide groove 132. As shown in Figures 10 to 13, in the rearward-facing use state, the guide column 1162 is located at the second inlet end The upper end of the rear wheel bracket 112, located at the mouth end 1182 and simultaneously at the first end 11321 of the slide groove 132, has a notch 1183 between the first entrance end 1181 and the second entrance end 1182, which is used in the process of the stroller changing between rear-facing and forward-facing use, and the guide column 1162 moves within the notch 1183, restricted by the limit block 1184, during which the guide column 1162 is located at the second end 11322 of the slide groove 132.
[0037] The side bracket 11 further includes a second locking device 119 provided between the front wheel bracket 111 and the rear wheel bracket 112. The second locking device 119 has a locked state and an unlocked state. In the locked state, the frame 1 is locked in the unfolded state. When both the first locking device 117 and the second locking device 119 are in the unlocked state, the stroller can be converted from the unfolded state to the folded state when used in the rearward-facing position, and the stroller can also be converted from the unfolded state to the folded state when used in the forward-facing position. Specifically, as shown in Figures 30 to 32, the second locking device comprises an intermediate gear 1191, a first gear groove 1192, and a second gear groove 1193. The second locking device 119 has a locked state and an unlocked state. As shown in Figure 31, in the locked state, the frame 1 is locked in the unfolded state, and the intermediate gear 1191 is inserted into the first gear groove 1192 and the second gear groove 1193, respectively, and the intermediate gear 1191 engages with the first gear groove 1192 and the second gear groove 1193 simultaneously. As shown in Figure 32, in the unlocked state, the intermediate gear 1191 is disengaged from one of the gear grooves and inserted into only the other gear groove, and the intermediate gear 1191 engages with one of the first gear groove 1192 and the second gear groove 1193.
[0038] In this embodiment, when the stroller is unfolded, as shown in Figures 1 to 5, when the stroller is facing forward, the extension directions of the push bar 113 and the front wheel bracket 111 are almost coincided, and pushing the push bar 113 forward allows the stroller to move forward. As shown in Figures 10 to 13, when the stroller is facing backward, the extension directions of the push bar 113 and the rear wheel bracket 112 are almost coincided.
[0039] As the stroller is converted from the unfolded to the folded state, as shown in Figures 14 to 19, the push bar 113 tends to fold downward around the central rotating shaft 1131, the folding pull rod 116 tends to move upward, and the front wheel bracket 111 and rear wheel bracket 112 gradually move toward each other. As shown in Figures 14 to 16, in the forward-facing use state, during the process of converting the frame 1 from the unfolded state to the folded state, the guide column 1162 is located at the first end 11321 of the slide groove 1132 and does not slide within the slide groove 1132. Instead, the guide column 1162 enters the guide groove 118 from the first entrance end 1181 and slides along the guide groove 118. As shown in Figures 17 to 19, in the rearward-facing use state, during the process of converting the frame 1 from the unfolded state to the folded state, the guide column 1162 is located at the first end 11321 of the slide groove 1132 and does not slide within the slide groove 1132. Instead, the guide column 1162 enters the guide groove 118 from the second entrance end 1182 and slides along the guide groove 118.
[0040] When the stroller is folded, as shown in Figures 20 to 25, the extension directions of the push bar 113, front wheel bracket 111, and rear wheel bracket 112 are almost identical, the upper end of the push bar 113, the lower end of the front wheel bracket 111, and the lower end of the rear wheel bracket 112 are close to each other, and the front wheel assembly 2 and the rear wheel assembly 3 overlap each other in the left-right direction. In this state, the volume of the stroller is smallest, making it convenient to transport and carry.
[0041] In short, the stroller of this invention improves the child's experience by adding a guide column to the top of the folding pull rod, which prevents the seat post from moving up and down when the push bar is reversed, and the stroller can be folded whether it is in the forward or reverse position, the folding process is simple, and the folded stroller has a small volume, making it convenient to carry.
[0042] The above embodiments are merely for the purpose of illustrating the technical idea and features of the present invention, and their purpose is to enable a person familiar with this art to understand and implement the contents of the present invention, but not to limit the scope of protection of the present invention. [Explanation of symbols]
[0043] 1. Frame 11. Side bracket 111. Front wheel bracket 1111. First rotation shaft 112. Rear wheel bracket 1121. Third rotation shaft 113. Push bar 1131. Center rotation shaft 1132. Slide groove 11321. First end 11322. Second end 114. Seat post 115. Rear link 1151. Second rotation shaft 116. Folding pull rod 1161. Fourth rotation shaft 1162. Guide column 117. First locking device 1171. Locking tongue 1172. Elastic part 1173. Rear locking hole 1174. Front locking hole 1175. Locking tongue drive part 118. Guide groove 1181. First entry end 1182. Second entry end 1183. Notch 1184. Limit block 119, Second locking device 1191, Intermediate gear 1192, First gear groove 1193, Second gear groove 2, Front wheel assembly 3, Rear wheel assembly 4, Tie rod
Claims
1. A stroller comprising a frame having side brackets located on both the left and right sides, having both an unfolded and a folded state, a front wheel assembly, and a rear wheel assembly, The aforementioned side bracket, in its deployed state, A front wheel bracket on which the front wheel assembly is provided at the lower part, A rear wheel bracket on which the rear wheel assembly is provided at the lower part, A push bar whose lower end is connected to the upper end of the front wheel bracket and the upper end of the rear wheel bracket so as to be rotatable toward each other, and which has a sliding groove in its lower end, A seat post used to connect a child's seat, the front end of which is pivotably connected to the front wheel bracket, A rear link whose front end is pivotably connected to the seat post and whose rear end is pivotably connected to the rear wheel bracket, A folding pull rod whose lower end is pivotably connected to the seat post and / or the rear link, and whose upper end is provided with a guide column into which the guide column is inserted into the slide groove, The first locking device has a locking operation state that prevents the push bar from rotating relative to the front wheel bracket and / or the rear wheel bracket, and an unlocking operation state that allows the push bar to rotate relative to the front wheel bracket and / or the rear wheel bracket. The stroller has a forward-facing and a rearward-facing configuration, and when the first locking device is in the unlocked state, the push bar rotates forward or backward relative to the front wheel bracket and rear wheel bracket so that the stroller can switch between the rearward-facing and forward-facing configurations, and during the conversion between the rearward-facing and forward-facing configurations, the upper end of the folding pull rod and the lower end of the push bar are connected to each other so as to be able to slide and rotate oppositely along the slide groove, and in the rearward-facing configuration, when the first locking device is in the unlocked state, the frame is allowed to switch from an unfolded state to a folded state, and in the forward-facing configuration, when the first locking device is in the unlocked state, the frame is allowed to switch from an unfolded state to a folded state.
2. The lower end of the push bar is pivotally connected coaxially to the upper end of the front wheel bracket and the upper end of the rear wheel bracket via a central rotating shaft, the slide groove is located below the central rotating shaft, and the slide groove has an end that moves away from the central rotating shaft and an end that moves closer to the central rotating shaft, as described in claim 1.
3. The stroller according to claim 2, characterized in that the longitudinal direction of the slide groove extends in the radial direction of the central rotating shaft.
4. The stroller according to claim 2, characterized in that a guide groove is provided around the central rotating shaft at the upper end of the rear wheel bracket.
5. The stroller according to claim 4, wherein both ends of the guide groove are a first entrance end and a second entrance end, respectively, and in the forward-facing use state, the guide column is located at the first entrance end, and in the forward-facing use state, during the conversion of the frame from the unfolded state to the folded state, the guide column does not slide within the slide groove, but enters the guide groove from the first entrance end and slides along the guide groove, and in the rearward-facing use state, the guide column is located at the second entrance end, and in the rearward-facing use state, during the conversion of the frame from the unfolded state to the folded state, the guide column does not slide within the slide groove, but enters the guide groove from the second entrance end and slides along the guide groove.
6. The stroller according to claim 5, wherein the upper end of the rear wheel bracket between the first entrance end and the second entrance end has a notch, the notch is used in the process of the stroller switching between a rearward-facing and a forward-facing position, and the guide column moves within the notch.
7. The first locking device is A locking tab is provided within the internal cavity at the lower part of the push bar so as to be slidable along the length of the push bar, and an elastic part is provided between it and the push bar to contact it. A front lock hole is provided in the upper end of the front wheel bracket or the upper end of the rear wheel bracket, with the direction of the opening being the radial direction of the central rotating shaft, and when the stroller is in the forward-facing use state, the locking tab is inserted into the front lock hole and the first locking device is in the locked state, A rear lock hole is provided in the upper end of the front wheel bracket or the upper end of the rear wheel bracket, with the direction of the opening being the radial direction of the central rotating shaft, and when the stroller is in the rearward-facing position, the locking tab is inserted into the rear lock hole and the first locking device is in the locked position, A locking tongue drive component connected to the locking tongue, wherein after the locking tongue is pulled so as to disengage from the front lock hole or the rear lock hole, the first locking device is in an unlocked state, the elastic part applies elastic force to the locking tongue, and the locking tongue has a tendency to be inserted into the front lock hole or the rear lock hole, The stroller according to claim 2, characterized by comprising the following features.
8. The front end of the seatpost and the front wheel bracket are pivotably connected via a first rotating shaft, the first rotating shaft being located below the central rotating shaft. The front end of the rear link is pivotably connected to the seat post via a second rotating shaft, the second rotating shaft being located behind the first rotating shaft, and the rear end of the rear link is pivotably connected to the rear wheel bracket via a third rotating shaft, the third rotating shaft being located below the central rotating shaft. The stroller according to claim 2, characterized in that the lower end of the folding pull rod is pivotably connected to the seat post and / or the rear link via a fourth rotating shaft, and the guide column is located below the central rotating shaft.
9. The stroller according to claim 8, characterized in that the fourth rotating shaft and the second rotating shaft are the same common rotating shaft with their axes coinciding, and the lower end of the folding pull rod is coaxially and pivotably connected to the front end of the rear link and the seat post via the common rotating shaft.
10. The stroller according to claim 1, wherein the side bracket further comprises a second locking device provided between the front wheel bracket and the rear wheel bracket, the second locking device having a locked state and an unlocked state, in the locked state the frame is locked in the unfolded state, and when both the first locking device and the second locking device are in the unlocked state, the stroller is allowed to be converted from the unfolded state to the folded state in the rearward-facing use state, and the stroller is also allowed to be converted from the unfolded state to the folded state in the forward-facing use state.
11. The stroller according to claim 1, characterized in that a tie rod is connected between the left and right side brackets.
12. A method for folding a stroller according to claim 10, A method for folding a stroller, characterized in that when both the first locking device and the second locking device are in the unlocked state, the stroller is operated so that it can be converted from the unfolded state to the folded state, regardless of whether it is in the rear-facing or forward-facing use state.