A luggage type baby carriage frame

Abstract

The application discloses a luggage type baby carriage frame body, which comprises a chassis, a containing cavity and a boss arranged on the upper surface of the chassis, the boss is arranged in the containing cavity at one end and extends upwards outside the containing cavity at the other end; the upper frame comprises a beam part and a sleeve part arranged perpendicularly with the beam part and extended from the two ends of the beam part, the beam part is hingedly connected with the rear end of the chassis, the upper frame rotates around the hinge connection to be opened or buckled on the chassis; a handle rod is telescopically connected with the sleeve part, the upper frame and the handle rod form a ring structure which can be adaptively fitted and arranged on the chassis; the supporting structure comprises a first supporting rod and a second supporting rod which are foldably connected, the first supporting rod is rotatably connected with the sleeve part, and the second supporting rod is rotatably connected with the chassis; when the upper frame and the chassis are in the buckling state, the handle rod can be clamped on the boss, and the supporting structure is folded and stored in the containing cavity, so that the volume of the frame body after folding and storing is reduced, and the stability of the frame body after folding and storing is improved.

Description

Technical Field

[0001] This application relates to the field of stroller technology, specifically to a bag-type stroller frame. Background Technology

[0002] Currently, most stroller frames on the market adopt a front and rear frame combined structure, typically consisting of a front wheel frame, a rear wheel frame, and a central hinge assembly connecting the two. When folded, the front and rear wheel frames rotate relative to each other around the hinge axis by operating the central hinge point, thus achieving a front-to-back folding. Some frames also use an upper and lower frame combined structure, such as the folding stroller disclosed in Chinese patent document CN211844591U, which uses two telescopic handle rods, one end of which is rotatably mounted on the base frame to achieve effective folding between the two handle rods and the base frame.

[0003] While the two folding structures described above achieve the basic folding function of the stroller frame and reduce space usage, their structural design limits the presence of noticeable gaps between components (such as the side gaps between the front and rear wheel supports, and the end gaps between the upper support and the base frame). This prevents the formation of a compact overall structure, resulting in a relatively large folded stroller and poor frame stability. In particular, the combined front and rear support structure makes folding the stroller relatively cumbersome, typically requiring either the front or rear wheel support to be held steady during folding.

[0004] Therefore, as users continue to demand higher space utilization and easier stroller folding, the limitations of existing structures are becoming increasingly apparent, and a better frame structure solution is urgently needed to solve these problems. Utility Model Content

[0005] Therefore, this application provides a bag-type stroller frame to solve the technical problems of large size and poor stability of the stroller frame after folding due to its non-compact structure, as well as the inconvenience of operation during the folding process.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A bag-type stroller frame includes: a chassis, on the top of which is a downwardly recessed receiving cavity and an upwardly protruding boss, one end of the boss being located in the receiving cavity and the other end extending upward outside the receiving cavity;

[0008] The upper frame includes a crossbeam portion and a sleeve portion extending from both ends of the crossbeam portion and arranged perpendicularly to the crossbeam portion. The crossbeam portion is hinged to the rear end of the chassis. The upper frame rotates about the hinge connection point as an axis to open or fasten the upper frame to the chassis.

[0009] The handlebar is telescopically connected to the sleeve portion, and the upper frame and the handlebar form a ring structure, which can be fitted and placed on the chassis.

[0010] The support structure includes a foldably connected first support rod and a second support rod, wherein the first support rod is rotatably connected to the sleeve portion and the second support rod is rotatably connected to the chassis.

[0011] When the upper frame and the chassis are engaged, the handlebar can be engaged with the protrusion, and the support structure is folded and stored in the receiving cavity; when the upper frame and the chassis are open, the support structure unfolds and supports between the upper frame and the chassis.

[0012] Optionally, the support structure further includes a first connector and a second connector. The first connector includes a first rotating part and a first connecting part, and the second connector includes a second rotating part and a second connecting part. The first connecting part is connected to the first support rod, and the second connecting part is connected to the second support rod. One side of the first rotating part and one side of the second rotating part are arranged opposite to each other and connected by a first rotating shaft. The direction of the first rotating shaft is consistent with the axial direction of the hinge connection. The first rotating part rotates relative to the second rotating part to fold or unfold the first support rod and the second support rod.

[0013] Optionally, the first rotating part is provided with a first sliding groove, which is an arc-shaped groove arranged around the first rotating shaft. The second rotating part is provided with a first slider adapted to the first sliding groove. When the first support rod and the second support rod are in the unfolded state, the first end of the first sliding groove abuts against the first slider. When the first support rod and the second support rod are in the folded state, the second end of the first sliding groove abuts against the first slider.

[0014] Optionally, the support structure further includes a locking assembly, which includes a second slider, a third slider, a first spring, and a first connecting rope. The second slider is disposed in a second groove within the first connecting portion, the opening end of which is blocked by the second rotating portion. A pin is provided at one end of the second slider near the second rotating portion, and a pin hole is provided on the second rotating portion. One end of the first spring is connected to the end of the second slider away from the pin, and the other end of the first spring abuts against the second groove. The third slider is slidably disposed within the sleeve portion. One end of the first connecting rope is connected to the third slider, and the other end of the first connecting rope is connected to the second slider along the compression direction of the first spring. When the upper frame and the chassis are in the open state, the pin engages in the pin hole to lock the first and second rotating portions. When the handlebar is retracted, pressing the third slider causes the pin to disengage from the pin hole, thereby releasing the locking of the first and second rotating portions.

[0015] Optionally, the chassis also includes wheels, with at least four wheels disposed below the chassis.

[0016] Compared with the prior art, this application has at least the following beneficial effects:

[0017] The bag-style stroller frame of this application features a ring-shaped structure formed by the upper frame and handlebars. When the stroller frame is folded, this ring-shaped structure fits snugly against the chassis, creating a regular, compact, bag-like structure. The support structure can be folded and stored within the chassis cavity, resulting in a compact and integrated stroller frame that reduces its overall size. The handlebars can also be engaged with protrusions to prevent components from loosening, thus improving the stability of the folded frame. Furthermore, unlike traditional front and rear frame structures, the folding process does not require separate stabilization of the front or rear wheel supports. It can be completed simply by rotating the upper frame and engaging the handlebars, reducing operational complexity and meeting users' needs for convenient folding. Attached Figure Description

[0018] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).

[0019] Figure 1 This is a schematic diagram of the open state structure of a bag-type stroller frame provided in an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the snap-fit ​​structure of a bag-type stroller frame provided in an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the support structure in an embodiment of this application;

[0022] Figure 4 Examples of embodiments in this application Figure 3 AA section view;

[0023] Figure 5 This is a partial exploded view of the support structure in the embodiments of this application;

[0024] Figure 6 This is a schematic diagram of the telescopic positioning structure in the embodiments of this application;

[0025] Figure 7 This is a partial exploded view of the telescopic positioning structure in the embodiments of this application;

[0026] Figure 8 Examples of embodiments in this application Figure 1 Enlarged view of part I in the image;

[0027] Figure 9 Examples of embodiments in this application Figure 8 BB section view in the middle;

[0028] Figure 10 A reference diagram showing the usage state (open) of a bag-type stroller frame provided in an embodiment of this application;

[0029] Figure 11 This is a reference diagram showing the usage state (fastening) of a bag-type stroller frame provided in an embodiment of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Chassis; 11. Receiving cavity; 12. Boss; 13. Slot; 2. Upper frame; 21. Crossbeam; 22. Sleeve; 3. Handlebar; 31. Horizontal bar; 32. Vertical bar; 4. Support structure; 41. First support rod; 42. Second support rod; 43. First connector; 431. First rotating part; 432. First connecting part; 433. First slide groove; 434. Second slide groove; 44. Second connector; 441. Second rotating part; 442. Second connecting part ; 443, First slider; 45, First pivot; 5, Lock assembly; 51, Second slider; 52, Third slider; 53, First spring; 54, First connecting rope; 6, First locking block; 7, Telescopic positioning structure; 71, Second locking block; 72, Third locking block; 73, First telescopic locking pin; 74, Second telescopic locking pin; 75, Fixing block; 76, Second spring; 77, Second connecting rope; 78, Third connecting rope; 8, Sleeve; 9, Seat support frame; 10, Seat assembly. Detailed Implementation

[0032] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] refer to Figures 1 to 9 As shown, this utility model provides a bag-type stroller frame, including a chassis 1, an upper frame 2, a handlebar 3, and a support structure 4. The chassis 1 has a receiving cavity 11 and a boss 12 on its upper surface. The receiving cavity 11 is surrounded by a raised wall formed around the periphery of the chassis 1. The upper surface of the raised wall is in the shape of a flat racetrack. The boss 12 is located in the receiving cavity 11 and extends upwards outwards from the receiving cavity 11, meaning the height of the boss 12 is higher than the height of the raised wall. The boss 12 is preferably located at the front end of the receiving cavity 11. At least four wheels are installed below the chassis 1, located at the four corners of the chassis 1 to provide stable support for the chassis 1.

[0034] The upper frame 2 includes a crossbeam portion 21 and a sleeve portion 22 extending from both ends of the crossbeam portion 21 and arranged perpendicularly to the crossbeam portion 21. The crossbeam portion 21 is hinged to the rear end of the chassis 1, preferably a hinge connection. The upper frame 2 rotates about the hinge connection point as an axis to open or fasten the upper frame 2 onto the chassis 1.

[0035] The handlebar 3 includes a crossbar portion 31 and a longitudinal bar portion 32 extending from both ends of the crossbar portion 31 and arranged perpendicularly to the crossbar portion 31. The longitudinal bar portion 32 is inserted into the sleeve portion 22 and is telescopically connected to the sleeve portion 22. The upper frame 2 and the handlebar 3 form a closed ring structure. The ring structure can be fitted and placed on the chassis 1 (when the stroller frame is fastened and the handlebar 3 is in the retracted state). At this time, the lower side of the ring structure is completely fitted with the chassis 1 and the outer contour is consistent, forming a regular and compact structure similar to a bag.

[0036] The support structure 4 is located between the upper frame 2 and the chassis 1, and two of them are set symmetrically. When the upper frame 2 is opened relative to the chassis 1, the support structure 4 plays a supporting role.

[0037] Taking a support structure 4 as an example, the support structure 4 mainly includes a foldable first support rod 41, a second support rod 42, a first connecting body 43, a second connecting body 44, and a locking assembly 5. The first connecting body 43 and the second connecting body 44 are fitted together between the first support rod 41 and the second support rod 42 to achieve a foldable connection between the first support rod 41 and the second support rod 42. Specifically, the first connecting body 43 includes a first rotating part 431 and a first connecting part 432, and the second connecting body 44 includes a second rotating part 441 and a second connecting part 442. The first connecting part 432 is connected to the first support rod 41, and the second connecting part 442 is connected to the second support rod 42. One side of the first rotating part 431 and one side of the second rotating part 441 are opposite to each other and connected by a first rotating shaft 45. The direction of the first rotating shaft 45 is consistent with the axial direction of the hinge connection. The first rotating part 431 rotates relative to the second rotating part 441 to fold or unfold the first support rod 41 and the second support rod 42. The end of the first support rod 41 away from the first connecting body 43 is rotatably connected to the sleeve part 22, and the end of the second support rod 42 away from the second connecting body 44 is rotatably connected to the chassis 1. The two sleeve parts 22 facing each other are the first side surfaces. Preferably, the first support rod 41 is connected to the first side surface, and the second support rod 42 is connected to the inner side wall of the receiving cavity 11 corresponding to the first side surface.

[0038] When the upper frame 2 and chassis 1 are engaged, i.e., when the bottom side of the upper frame 2 is in contact with the upper surface of the raised wall, the handlebar 3 can be engaged with the boss 12 to prevent the upper frame 2 from separating from the chassis 1 when engaged, thus affecting stability. The support structure 4 is folded and stored in the receiving cavity 11 to reduce the extra space occupied by the support structure 4 and reduce the compactness of the frame structure after it is folded. When the upper frame 2 and chassis 1 are open, the support structure 4 is unfolded and supported between the upper frame 2 and chassis 1. The locking assembly 5 is used to lock the unfolded support structure 4 to prevent the upper frame 2 from being engaged with the chassis 1 when using the stroller frame.

[0039] In one specific embodiment, the first rotating part 431 is provided with a first sliding groove 433, and the second rotating part 441 is provided with a first sliding block 443 adapted to the first sliding groove 433. When the first support rod 41 and the second support rod 42 are in the unfolded state, the first support rod 41 and the second support rod 42 are coaxial, and the first end of the first sliding groove 433 abuts against the first sliding block 443; when the first support rod 41 and the second support rod 42 are in the folded state, the second end of the first sliding groove 433 abuts against the first sliding block 443. Because the first sliding groove 433 limits the path of the first sliding block 443, the rotation of the first rotating part 431 relative to the second rotating part 441 is more stable, increasing the stability of the support structure 4.

[0040] In one specific embodiment, the locking assembly 5 includes a second slider 51, a third slider 52, a first spring 53, and a first connecting rope 54. The second slider 51 is disposed in a second groove 434 provided in the first connecting portion 432. One end of the second groove 434 is provided with an opening, and the open end of the second groove 434 is blocked by a second rotating portion 441. A pin is provided at the end of the second slider 51 near the second rotating portion 441, and a pin hole is provided on the second rotating portion 441. One end of the first spring 53 is connected to the end of the second slider 51 away from the pin. The other end of the first spring 53 abuts against the bottom end of the second slide groove 434 (the end away from the opening of the second slide groove 434). The third slider 52 is slidably disposed inside the sleeve 22, and when the handle 3 is retracted, pressing the third slider 52 moves it closer to the crossbeam 21. One end of the first connecting rope 54 is connected to the third slider 52, and the other end of the first connecting rope 54 is connected to the second slider 51 along the compression direction of the first spring 53. The sleeve 22, the sidewalls of the first support rod 41, and the bottom end of the second slide groove 434 are all provided with features allowing the first spring 53 to move. When the upper frame 2 and chassis 1 are in the open state, the pin head is engaged in the hole through which the connecting rope 54 passes, locking the first rotating part 431 relative to the second rotating part 441 so that the first support rod 41 and the second support rod 42 remain in a supported state, and the frame and chassis 1 remain in the open state. When the third slider 52 is pressed by the handlebar 3, the third slider 52 drives the second slider 51 to move along the second slide groove 434 through the first connecting rope 54 and compresses the first spring 53, causing the pin head to exit the pin hole, thereby unlocking the first rotating part 431 relative to the second rotating part 441. When rotated, the first support rod 41 and the second support rod 42 can be folded, and the frame and chassis 1 can be fastened together to fold the stroller. When the upper frame 2 and chassis 1 are opened, the handlebar 3 needs to be stretched first to release the pressure on the third slider 52. The first support rod 41 and the second support rod 42 gradually unfold, the first rotating part 431 rotates relative to the second rotating part 441, and the third slider 52 moves away from the end of the crossbeam 21. When the first support rod 41 and the second support rod 42 are fully unfolded, the second slider 51, under the action of the first spring 53, causes the pin head to quickly engage with the pin hole. In this embodiment, the locking assembly 5 can realize the quick locking and unlocking of the support structure 4, making the unfolding and folding of the stroller frame more convenient.

[0041] In one specific embodiment, a telescopic positioning structure 7 is provided inside the handlebar 3, thereby ensuring that the handlebar 3 can be fixed at a designated position on the sleeve 22 while extending and retracting within the sleeve 22. When the handlebar 3 is fully extended, it is fixed to the sleeve 22, ensuring safety and convenience for the use of the stroller frame. When the handlebar 3 is fully retracted, it also needs to be fixed to the sleeve 22. At this time, the annular structure formed by the handlebar 3 and the upper frame 2 engages with the boss 12, allowing the annular structure to fit onto the boss 12 and preventing the upper frame 2 from separating from the chassis 1. Exemplarily, a slot 13 is provided at the front end of the boss 12, and a pressable first locking block 6 is provided at the position of the crossbar portion 31 of the handlebar 3 corresponding to the slot 13. The first locking block 6 can engage within the slot 13.

[0042] The telescopic positioning structure 7 includes a second locking block 71, a third locking block 72, a first telescopic locking pin 73, and a second telescopic locking pin 74. The first telescopic locking pin 73 and the second telescopic locking pin 74 are telescopically mounted on the two longitudinal sections 32 of the handle 3. The first telescopic locking pin 73 is connected to the second locking block 71 via a second connecting rope 77, and the second telescopic locking pin 74 is connected to the third locking block 72 via a third connecting rope 78. The second locking block 71 and the third locking block 72 are slidably engaged on the horizontal section 31, and the second locking block 71 and the third locking block 72 abut against the two end faces of the first locking block 6. Pressing the first locking block 6 causes the second locking block 71 and the third locking block 72 to move towards each other. (Reference) Figure 7 As shown, a first inclined surface is provided on the surfaces of the second locking block 71 and the third locking block 72 that are far apart from each other, and a second inclined surface is provided on both ends of the first locking block 6. The first inclined surface abuts against the second inclined surface. When the first locking block 6 is pressed, the second locking block 71 and the third locking block 72 move closer to each other, thereby the second locking block 71 drives the first telescopic locking pin 73 to retract, and the third locking block 72 drives the second telescopic locking pin 74 to retract. Limiting holes are provided at both ends of the first side of the sleeve part 22. When the first telescopic locking pin 73 and the second telescopic locking pin 74 are engaged in the limiting holes, the handle bar 3 can be limited, thereby fixing the handle bar 3 to the sleeve part 22. When the first locking block 6 is pressed, the second locking block 71 pulls the second connecting rope 77 to retract the first locking pin and exit the limiting hole, and the third locking block 72 pulls the third connecting rope 78 to retract the second locking pin and exit the limiting hole, thereby allowing the handle bar 3 to continue to slide in the sleeve part 22.

[0043] It should be noted that the first locking block 6 is set on the handle bar 3 through the locking sleeve 8, the second locking block 71 and the third locking block 72 are symmetrically arranged at both ends of the first locking block 6, the second connecting rope 77 and the third connecting rope 78 are set inside the handle bar 3, and the first telescopic locking pin 73 and the second telescopic locking pin 74 are fixed on the longitudinal rod 32 in the same way. Taking the fixing method of the first telescopic locking pin 73 on the longitudinal rod 32 as an example, a fixing block 75 is fixedly set inside the longitudinal rod 32, and a transverse third sliding groove is set on the fixing block 75. The first telescopic locking pin 73 and the compressed second spring member 76 are set in the third sliding groove. The inner side wall of the longitudinal rod 32 seals the opening of the third sliding groove. The locking end of the first telescopic locking pin 73 passes through the fixing block 75 and the longitudinal rod 32 through the through hole. When the first telescopic locking pin 73 is opposite to the limiting hole, the first telescopic locking pin 73 is locked into the limiting hole under the action of the second spring.

[0044] refer to Figure 9 , Figure 10 As shown, in a specific embodiment, the stroller frame also includes a seat support frame 9, which is attached to the side of the upper frame 2 away from the chassis 1. A retractable seat assembly 10 is hinged to the seat support frame 9. The retractable seat assembly 10 is prior art and will not be discussed in detail. When the seat assembly 10 is retracted, part of the structure of the seat assembly 10 can be placed in the receiving cavity 11.

[0045] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A bag-style stroller frame, characterized in that, include: The chassis (1) has a downwardly recessed receiving cavity (11) and an upwardly protruding boss (12) on its upper surface. One end of the boss (12) is located in the receiving cavity (11) and the other end extends upward outside the receiving cavity (11). The upper frame (2) includes a crossbeam (21) and a sleeve (22) extending from both ends of the crossbeam (21) and arranged perpendicularly to the crossbeam (21). The crossbeam (21) is hinged to the rear end of the chassis (1). The upper frame (2) rotates about the hinge connection point to open or fasten to the chassis (1). Handlebar (3), the handlebar (3) is telescopically connected to the sleeve (22), the upper frame (2) and the handlebar (3) form a ring structure, the ring structure can be adapted to fit and fit on the chassis (1); The support structure (4) includes a first support rod (41) and a second support rod (42) that can be folded and connected. The first support rod (41) is rotatably connected to the sleeve part (22), and the second support rod (42) is rotatably connected to the chassis (1). When the upper frame (2) and the chassis (1) are engaged, the handlebar (3) can be engaged with the boss (12), and the support structure (4) is folded and stored in the receiving cavity (11); when the upper frame (2) and the chassis (1) are open, the support structure (4) unfolds and supports between the upper frame (2) and the chassis (1).

2. The bag-type stroller frame according to claim 1, characterized in that, The support structure (4) further includes a first connector (43) and a second connector (44). The first connector (43) includes a first rotating part (431) and a first connecting part (432). The second connector (44) includes a second rotating part (441) and a second connecting part (442). The first connecting part (432) is connected to the first support rod (41), and the second connecting part (442) is connected to the second support rod (42). One side of the first rotating part (431) and one side of the second rotating part (441) are arranged opposite to each other and connected by a first rotating shaft (45). The direction of the first rotating shaft (45) is consistent with the axial direction of the hinge connection. The first rotating part (431) rotates relative to the second rotating part (441) to fold or unfold the first support rod (41) and the second support rod (42).

3. The bag-type stroller frame according to claim 2, characterized in that, The first rotating part (431) is provided with a first sliding groove (433), which is an arc-shaped groove arranged around the first rotating shaft (45). The second rotating part (441) is provided with a first slider (443) adapted to the first sliding groove (433). When the first support rod (41) and the second support rod (42) are in the unfolded state, the first end of the first sliding groove (433) abuts against the first slider (443). When the first support rod (41) and the second support rod (42) are in the folded state, the second end of the first sliding groove (433) abuts against the first slider (443).

4. A bag-type stroller frame according to claim 2, characterized in that, The support structure (4) further includes a locking assembly (5), which includes a second slider (51), a third slider (52), a first spring (53), and a first connecting rope (54). The second slider (51) is disposed in a second groove (434) provided in the first connecting part (432). The opening end of the second groove (434) is blocked by the second rotating part (441). A pin is provided at one end of the second slider (51) near the second rotating part (441). A pin hole is provided on the second rotating part (441). One end of the first spring (53) is connected to the end of the second slider (51) away from the pin. The other end of the first spring (53) is connected to the first connecting rope (54). The second slide groove (434) abuts against each other, and the third slider (52) is slidably disposed in the sleeve part (22). One end of the first connecting rope (54) is connected to the third slider (52), and the other end of the first connecting rope (54) is connected to the second slider (51) along the compression direction of the first spring (53). When the upper frame (2) and the chassis (1) are in the open state, the pin head is inserted into the pin hole to lock the first rotating part (431) and the second rotating part (441). When the handle bar (3) is retracted, the third slider (52) is pressed, and the pin head is withdrawn from the pin hole to release the locking of the first rotating part (431) and the second rotating part (441).

5. A bag-type stroller frame according to claim 1, characterized in that, The chassis (1) also includes wheels, at least four of which are provided and located below the chassis (1).

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