阅读说明：本技术 可折叠车架 (Foldable frame ) 是由 李伟 于 2020-05-21 设计创作，主要内容包括：本发明公开了一种可折叠车架,包括：前脚组件、后脚组件、手把组件、支撑杆组件和卡位组件。前脚组件同时与后脚组件、手把组件在不同位置铰接。支撑杆组件的两端分别与手把组件、后脚组件的另外两点铰接。卡位组件包括：卡接件、第一弹性件和提拉部,卡接件可滑动地设在第三连接架上,第一弹性件用于驱动卡接件朝向卡入第一连接架的方向滑动,提拉部与卡接件相连并用于提拉卡接件脱离第一连接架,可折叠车架在展开状态下,卡接件至少两处卡在第一连接架上,以限制第一连接架和第三连接架之间的转动。本发明实施例的可折叠车架,展开后稳定,状态切换快速。(The invention discloses a foldable frame, comprising: the front foot assembly, the rear foot assembly, the handle assembly, the support rod assembly and the clamping assembly. The front foot component is hinged with the rear foot component and the handle component at different positions. Two ends of the supporting rod component are respectively hinged with the other two points of the handle component and the rear foot component. The screens subassembly includes: joint spare, first elastic component and carry and draw the portion, joint spare slidable ground is established on the third link, and first elastic component is used for driving joint spare and slides towards the direction of card income first link, carries to draw the portion and links to each other with joint spare and be used for carrying and draw joint spare to break away from first link, and collapsible bicycle frame is under the expansion state, and joint spare two at least places cards are on first link to the rotation between first link of restriction and the third link. The foldable frame disclosed by the embodiment of the invention is stable after being unfolded and is fast in state switching.)

1. A foldable frame, comprising:

the front foot component is hinged with the rear foot component, the handle component is hinged with the front foot component, one end of the support rod component is hinged with the handle component, and the other end of the support rod component is hinged with the rear foot component;

the screens subassembly includes: the front foot component and the handle component are positioned by driving the clamping piece to slide towards the direction of clamping the front foot component, the lifting part is connected with the clamping piece, and the lifting part is used for lifting the clamping piece to be separated from the front foot component;

the foldable frame has an unfolding state and a folding state, and in the unfolding state, at least two positions of the clamping piece are clamped on the front foot assembly so as to limit the rotation between the front foot assembly and the handle assembly; in the storage state, the clamping piece is separated from the clamping of the front foot assembly, and the free ends of the handle assembly, the front foot assembly and the rear foot assembly are close to each other to realize storage and folding.

2. The foldable frame of claim 1, wherein the front foot assembly comprises a first connecting frame extending obliquely upward from front to rear, the first connecting frame having a first hinge point and a second hinge point spaced from front to rear; the rear foot assembly comprises a second connecting frame, the second connecting frame is inclined downwards from front to back and extends, a third hinge joint point and a fourth hinge joint point are sequentially arranged on the second connecting frame from top to bottom, and the third hinge joint point is connected with the first hinge joint point; the handle assembly comprises a third connecting frame, a fifth hinge point and a sixth hinge point are sequentially arranged on the third connecting frame from front to back, and the fifth hinge point is connected with the second hinge point; one end of the supporting rod assembly is connected with the fourth hinge point, and the other end of the supporting rod assembly is connected with the sixth hinge point.

3. The foldable frame of claim 2, wherein the rear end of the first connecting frame is provided with a first rotating shell, the second hinge point is located on the first rotating shell, the front end of the third connecting frame is provided with a second rotating shell, and the fifth hinge point is located on the second rotating shell; wherein, follow the flexible direction of joint spare, first rotation shell is gone up the spaced apart ground and is equipped with first draw-in groove and second draw-in groove, under the expansion state, partly block of joint spare is in respectively first draw-in groove with in the second draw-in groove.

4. The foldable frame of claim 3, wherein the first rotating shell comprises: the connecting column is connected to the arc edge of the sector plate, the end of the connecting column, facing the sector plate, is provided with the first clamping groove, the second clamping groove is formed in the arc edge of the sector plate, and the second hinge point is located at the circle center of the sector plate; and the number of the first and second electrodes,

one side of the second rotating shell is recessed to form a fan-shaped groove, a telescopic channel which is communicated towards the fan-shaped groove is further arranged on the second rotating shell, and the fifth hinge point is located at the circle center of the fan-shaped groove; the sector plate is matched in the sector groove, the clamping piece is partially positioned in the sector groove and partially positioned in the telescopic channel, and the first elastic piece is arranged in the telescopic channel.

5. The foldable frame of claim 4, wherein a guide slot is formed in a bottom wall of the sector slot, a portion of the clip is slidably disposed in the guide slot, and the second clip slot, the guide slot and the telescopic channel are aligned in the unfolded state.

6. The foldable frame according to claim 4, wherein the clip is in the shape of an elongated sheet, the clip forms a boss on a portion of the clip located in the telescopic channel, in the unfolded state, a front end of the clip extends out of the fan-shaped groove and is clamped in the second clamping groove, and the boss extends out of the telescopic channel and is clamped in the first clamping groove.

7. The foldable frame as claimed in claim 4, wherein the snap-in member has a receiving groove extending therethrough in the thickness direction, and the first elastic member is disposed in the receiving groove; the screens subassembly still includes: the pin column penetrates through the accommodating groove, two ends of the pin column are connected to the second rotating shell, and the rear end of the first elastic piece abuts against the pin column;

first elastic component is cylindrical spring, cylindrical spring's diameter is greater than the thickness of joint spare, be equipped with on the relative inner wall of flexible passageway with cylindrical spring assorted crescent moon groove.

8. The foldable frame of claim 3, wherein one of the first and second rotating shells has an arc-shaped rotating slot, the arc-shaped rotating slot has an arc shape with a center at the second hinge point, and the other of the first and second rotating shells has a protrusion slidably fitted in the arc-shaped rotating slot.

9. The foldable frame of any one of claims 2-8, wherein the front foot assembly comprises two first connecting frames arranged in parallel, each first connecting frame is correspondingly provided with a group of the second connecting frame, the third connecting frame, the support rod assembly and the blocking assembly at the rear end, and the lifting parts of the blocking assemblies of the two groups are positioned on the handle assembly;

the support rod assembly comprises a first support rod, a second support rod and a second elastic part which are mutually sleeved, one end of the first support rod is connected with the fourth hinge point, the second support rod is sleeved in the first support rod, the second elastic part is connected between the second support rod and the first support rod, and the other end of the second support rod is connected with the sixth hinge point.

10. The foldable frame of claim 9, wherein the first support rod is provided with a limiting through hole in the length direction, the second support rod is connected with a limiting rod, and the limiting rod is in limiting fit in the limiting through hole.

Technical Field

The invention belongs to the technical field of trolleys, and particularly relates to a foldable trolley frame.

Background

In order to save storage space and to make the cart portable, existing carts are typically foldable and collapsible. The existing folding structure usually needs more auxiliary components, so that the structural design of the whole trolley is complex, more space is occupied, and the lightweight design of the trolley is not facilitated. The folding structure adopts independent clamping structure locking at joints, the folding can be realized only by manually removing the independent clamping before folding, otherwise, the trolley can not be folded directly, when each folding joint is provided with the clamping structure, the clamping needs to be removed for many times in the folding process, and the operation is complex. Some trolleys are unstable in structure in the unfolding state, and are easy to partially retract from the unfolding state when pushed on a bumpy road surface, so that the bearing stability is poor.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a foldable frame which is fast to fold and stable to unfold and solves the technical problems of complex folding operation and poor stability after unfolding.

According to an embodiment of the invention, a foldable frame comprises: the front foot component is hinged with the rear foot component, the handle component is hinged with the front foot component, one end of the support rod component is hinged with the handle component, and the other end of the support rod component is hinged with the rear foot component; the screens subassembly includes: the front foot component and the handle component are positioned by driving the clamping piece to slide towards the direction of clamping the front foot component, the lifting part is connected with the clamping piece, and the lifting part is used for lifting the clamping piece to be separated from the front foot component; the foldable frame has an unfolding state and a folding state, and in the unfolding state, at least two positions of the clamping piece are clamped on the front foot assembly so as to limit the rotation between the front foot assembly and the handle assembly; in the storage state, the clamping piece is separated from the clamping of the front foot assembly, and the free ends of the handle assembly, the front foot assembly and the rear foot assembly are close to each other to realize storage and folding.

According to the foldable frame disclosed by the embodiment of the invention, the front foot assembly and the rear foot assembly are hinged to form a first rotating point, the front foot assembly and the handlebar assembly form a second rotating point, the handlebar assembly and one end of the support rod assembly are hinged to form a third rotating point, the rear foot assembly and the other end of the support rod assembly are hinged to form a fourth rotating point, and the four rotating points are vertexes to form a variable quadrilateral structure. When the foldable bicycle frame is in the unfolded state, at least two positions of the clamping pieces are clamped on the front foot assembly, so that the rotation of each rotating point is limited, and the foldable bicycle frame is kept stable in the unfolded state. The first elastic component of design often drives the joint spare and slides towards preceding foot subassembly's direction and makes collapsible frame be in stall state in the screens subassembly, and the portion of pulling that links to each other with the joint spare then can drive the joint spare and overcome the effort of first elastic component and break away from the block with preceding foot subassembly, and then makes the quadrangle that four turning points constitute can realize warping for the state of accomodating and expanding of collapsible frame switches fast, easy operation. When the foldable bicycle frame is in a storage state, the free ends of the handlebar assembly, the front foot assembly and the rear foot assembly are close to each other to realize storage and folding, and finally the whole occupied space of the foldable bicycle frame is small, so that the foldable bicycle frame is convenient to carry.

According to the foldable frame, the front foot assembly comprises a first connecting frame, the first connecting frame extends upwards in an inclined mode from front to back, and a first hinge point and a second hinge point which are spaced from each other are arranged on the first connecting frame from front to back; the rear foot assembly comprises a second connecting frame, the second connecting frame is inclined downwards from front to back and extends, a third hinge joint point and a fourth hinge joint point are sequentially arranged on the second connecting frame from top to bottom, and the third hinge joint point is connected with the first hinge joint point; the handle assembly comprises a third connecting frame, a fifth hinge point and a sixth hinge point are sequentially arranged on the third connecting frame from front to back, and the fifth hinge point is connected with the second hinge point; one end of the supporting rod assembly is connected with the fourth hinge point, and the other end of the supporting rod assembly is connected with the sixth hinge point. According to the foldable frame disclosed by the embodiment of the invention, the rear end of the first connecting frame is provided with the first rotating shell, the second hinge point is positioned on the first rotating shell, the front end of the third connecting frame is provided with the second rotating shell, and the fifth hinge point is positioned on the second rotating shell; wherein, follow the flexible direction of joint spare, first rotation shell is gone up the spaced apart ground and is equipped with first draw-in groove and second draw-in groove, under the expansion state, partly block of joint spare is in respectively first draw-in groove with in the second draw-in groove.

According to a further embodiment of the invention, the first rotating housing comprises: the connecting column is connected to the arc edge of the sector plate, the end of the connecting column, facing the sector plate, is provided with the first clamping groove, the second clamping groove is formed in the arc edge of the sector plate, and the second hinge point is located at the circle center of the sector plate; one side of the second rotating shell is recessed to form a fan-shaped groove, a telescopic channel which is communicated towards the fan-shaped groove is further arranged on the second rotating shell, and the fifth hinge point is located at the circle center of the fan-shaped groove; the sector plate is matched in the sector groove, the clamping piece is partially positioned in the sector groove and partially positioned in the telescopic channel, and the first elastic piece is arranged in the telescopic channel.

Advantageously, a guide groove is formed in the bottom wall of the sector groove, a part of the clamping piece is slidably arranged in the guide groove, and in the unfolded state, the second clamping groove, the guide groove and the telescopic channel are located on the same straight line.

Optionally, joint spare is rectangular slice, joint spare is lieing in form the boss on the part in the flexible passageway, under the expansion state, the front end of joint spare is stretched out fan-shaped groove and card are in the second draw-in groove, the boss stretches out flexible passageway and card are in the first draw-in groove.

According to a further embodiment of the present invention, the clamping member is provided with an accommodating groove penetrating in a thickness direction, and the first elastic member is arranged in the accommodating groove; the screens subassembly still includes: the pin column penetrates through the accommodating groove, two ends of the pin column are connected to the second rotating shell, and the rear end of the first elastic piece abuts against the pin column; first elastic component is cylindrical spring, cylindrical spring's diameter is greater than the thickness of joint spare, be equipped with on the relative inner wall of flexible passageway with cylindrical spring assorted crescent moon groove.

Optionally, one of the first rotating shell and the second rotating shell is provided with an arc-shaped rotating groove, the arc-shaped rotating groove is arc-shaped, the circle center of the arc-shaped rotating groove is located on the second hinge point, and the other one of the first rotating shell and the second rotating shell is provided with a protrusion which is in sliding fit with the arc-shaped rotating groove.

According to the foldable frame provided by the embodiment of the invention, the front foot assembly comprises two first connecting frames which are arranged in parallel, the rear end of each first connecting frame is correspondingly provided with one group of the second connecting frame, the third connecting frame, the supporting rod assembly and the clamping assembly, and the lifting parts of the two groups of the clamping assemblies are positioned on the handle assembly; the support rod assembly comprises a first support rod, a second support rod and a second elastic part which are mutually sleeved, one end of the first support rod is connected with the fourth hinge point, the second support rod is sleeved in the first support rod, the second elastic part is connected between the second support rod and the first support rod, and the other end of the second support rod is connected with the sixth hinge point.

Optionally, the first support rod is provided with a limiting through hole in the length direction, the second support rod is connected with a limiting rod, and the limiting rod is in limiting fit in the limiting through hole.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view showing the overall structure of a foldable frame according to an embodiment of the present invention.

Fig. 2 is a partially split structural schematic view of a foldable frame according to an embodiment of the present invention.

Fig. 3 is a partially split view of another angle of the foldable frame according to an embodiment of the present invention.

Fig. 4 is a longitudinal sectional view of a foldable frame of one embodiment of the present invention through a first rotating case.

Fig. 5 is a schematic structural view of fig. 4 with the first rotating case hidden.

Fig. 6 is a schematic perspective view of a second rotating housing according to an embodiment of the present invention.

Fig. 7 is a structural view illustrating another angle of the second rotating case according to an embodiment of the present invention.

Fig. 8 is a schematic structural view of a cart according to an embodiment of the present invention.

Fig. 9 is a schematic view of the structure of the cart with bassinet assembly in accordance with one embodiment of the present invention.

Reference numerals:

a foldable frame 100,

A front foot component 1,

A first connecting frame 11, a first hinge point 111, a second hinge point 112,

A first rotating shell 12,

A sector plate 121, a connecting column 122,

A first slot 123, a second slot 124, a protrusion 125,

A rear foot component 2, a second connecting frame 21, a third hinge point 211, a fourth hinge point 212, a linkage rod 22,

A handle component 3,

A third connecting frame 31, a fifth hinge point 311, a sixth hinge point 312,

A second rotating case 32,

A sector groove 321, a guide groove 322, a telescopic channel 323, an arc-shaped rotating groove 324, a half-moon groove 325,

A supporting rod component 4,

A first supporting rod 41, a limit through hole 411,

A second support rod 42, a second elastic piece 43, a limit rod 44,

A clamping component 5,

A clamping piece 51, a boss 511, a containing groove 512,

A pulling part 53,

The locking assembly 6, the locking block 61, the locking edge 62, the locking hole 621,

A trolley 200,

A cradle assembly 210, a wheel assembly 220.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

The foldable frame 100 according to the embodiment of the present invention will be described with reference to the drawings attached to the specification.

A foldable frame 100 according to an embodiment of the present invention, as shown in fig. 1 and 2, includes: the front foot assembly 1, the rear foot assembly 2, the handle assembly 3, the support rod assembly 4 and the clamping assembly 5 (the structure of the clamping assembly 5 is shown in figure 2).

As shown in figure 1, the front foot assembly 1 is hinged with the rear foot assembly 2, the handle assembly 3 is hinged with the front foot assembly 1, and one end of the support rod assembly 4 is hinged with the handle assembly 3, and the other end is hinged with the rear foot assembly 2. The hinge positions formed between each two parts are different, so that four turning points or turning axes are formed.

In some specific examples, as shown in fig. 1, the front foot assembly 1 includes a first link frame 11, the first link frame 11 extends obliquely upward from front to rear, and as shown in fig. 2, the first link frame 11 is provided with a first hinge point 111 and a second hinge point 112 spaced from each other from front to rear.

In some specific examples, as shown in fig. 1, the rear foot assembly 2 includes a second connecting frame 21, the second connecting frame 21 extends from front to back in a downward inclination manner, as shown in fig. 2, a third hinge point 211 and a fourth hinge point 212 are sequentially arranged on the second connecting frame 21 from top to bottom, and the third hinge point 211 is connected to the first hinge point 111. Here, the first hinge point 111 and the third hinge point 211 are connected to form a rotation point.

In some specific examples, as shown in fig. 1, the handlebar assembly 3 includes a third connecting frame 31, and as shown in fig. 2, a fifth hinge point 311 and a sixth hinge point 312 are sequentially disposed on the third connecting frame 31 from front to back, and the fifth hinge point 311 is connected to the second hinge point 112. The fifth hinge point 311 is connected to the second hinge point 112 to form a rotation point.

In some specific examples, as shown in fig. 2, one end of the support rod assembly 4 is connected to the fourth hinge point 212, and the other end of the support rod assembly 4 is connected to the sixth hinge point 312. This will create two pivot points at the ends of the support rod assembly 4.

As shown in fig. 2 and 4, the detent assembly 5 includes: the front foot assembly comprises a clamping piece 51, a first elastic piece (not shown in the figures) and a lifting portion 53, wherein the clamping piece 51 is slidably arranged on the handle assembly 3 and can slide along the length direction of the handle assembly 3 (in a specific example, the third connecting frame 31), the first elastic piece is arranged between the clamping piece 51 and the handle assembly 3 and is used for driving the clamping piece 51 to slide towards the direction of the clamped-in front foot assembly 1 (in a specific example, the first connecting frame 11) so as to position the front foot assembly 1 and the handle assembly 3 (in a specific example, to position the first connecting frame 11 and the third connecting frame 31), the lifting portion 53 is connected with the clamping piece 51, and the lifting portion 53 is used for lifting the clamping piece 51 to be separated from the front foot assembly 1 (in a specific example, the first connecting frame 11).

The foldable frame 100 has an unfolded state in which at least two portions of the clip 51 are clipped on the front foot assembly 1 (in a specific example, the first connecting frame 11) to limit the rotation between the front foot assembly 1 and the handle assembly 3, and a folded state.

In the storage state of the foldable frame 100, the latch 51 is disengaged from the front leg assembly 1 (in the specific example, the first connecting frame 11), and the free ends of the handle assembly 3, the front leg assembly 1 and the rear leg assembly 2 are close to each other to achieve storage and folding. As in the specific example, the upper end of the third link frame 31 forms a free end, and the lower ends of the first link frame 11 and the second link frame 21 form a free end, then the upper end of the third link frame 31 is drawn toward the lower end of the second link frame 21, and the lower end of the second link frame 21 is drawn toward the lower end of the first link frame 11.

As can be seen from the above structure, in the foldable frame 100 according to the embodiment of the present invention, as shown in fig. 4, the first hinge point 111 on the first connecting frame 11 is connected to the third hinge point 211 on the second connecting frame 21 to form a first pivot point, the second hinge point 112 on the first connecting frame 11 is connected to the fifth hinge point 311 of the third connecting frame 31 to form a second pivot point, the sixth hinge point 312 of the third connecting frame 31 is connected to one end of the supporting rod assembly 4 to form a third pivot point, the fourth hinge point of the second connecting frame 21 is connected to the other end of the supporting rod assembly 4 to form a fourth pivot point, and the four pivot points are connected as vertexes to form a variable quadrilateral structure.

When the expansion state, joint spare 51 two at least joints are on first link 11, the part that the spacing point that is formed by joint spare 51 and first link 11 constitutes restricts first pin joint 111, second pin joint 112, fifth pin joint 311, the distance between the sixth pin joint 312, and make second pin joint 112 for first pin joint 111, sixth pin joint 312 all can't rotate, thereby form a stable triangle-shaped frame construction at least, finally, first link 11, second link 21, bracing piece subassembly 31, all can't rotate relatively between third link 31 and the screens subassembly 5. That is, in the unfolded state, the rotation of each rotation point is restricted, so that the foldable frame 100 is stabilized in the unfolded state without collapsing at a partial position and without partially retracting the foldable frame 100 in the unfolded state.

On the contrary, when joint 51 is not mutually the joint with first link span 31, second pin joint 112 then resumes the rotation for first pin joint 111, sixth pin joint 312, makes third link span 31 take place to rotate for first link span 11, and the distance between first pin joint 111 and the sixth pin joint 312 changes to the bracing piece subassembly 4, the second link span 21 that drive the linkage takes place to rotate, by the state of accomodating that the expansion state got into.

In the present application, the first elastic member designed in the locking assembly 5 normally drives the locking member 51 to slide toward the first connecting frame 11, so that the foldable frame 100 is in the state of stopping rotating, and therefore when the third connecting frame 31 rotates to the close unfolding state relative to the first connecting frame 11, under the action of the first elastic member, the locking member 51 will be quickly locked with the first connecting frame 11 to form a limit position, and the final stable unfolding state is conveniently and quickly entered.

The pulling portion 53 connected to the clip member 51 can drive the clip member 51 to overcome the acting force of the first elastic member and disengage from the first connecting frame 11, so that the quadrangle formed by the four rotation points can be deformed, and therefore the foldable frame 100 with the clip assembly 5 of the present application can be rapidly switched between the storage state and the unfolding state, and is simple to operate.

In the storage state, the upper end of the third link 31 is closed toward the lower end of the second link 21, and the lower end of the second link 21 is closed toward the lower end of the first link 11, so that the foldable frame 100 occupies a small space and is convenient to carry.

In the description of the invention, the features defined as "first", "second", "third", "fourth", "fifth" and "sixth" may explicitly or implicitly include one or more of the features for distinguishing between the described features, whether sequential or not.

In some examples, the first elastic member includes a plurality of first elastic members, the plurality of first elastic members are all connected with the clamping member 51 and drive the clamping member 51 to be clamped into the first connecting frame 11, when the plurality of first elastic members are arranged to drive the clamping member 51, the clamping member 51 has high force stability, and the elastic restoring force of the first elastic member to the clamping member 51 is always kept. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In some embodiments of the present invention, as shown in fig. 2, the first link frame 11 is provided at a rear end thereof with a first rotating case 12, the second hinge point 112 is located on the first rotating case 12, the third link frame 31 is provided at a front end thereof with a second rotating case 32, and the fifth hinge point 311 is located on the second rotating case 32. Wherein, as shown in fig. 3, along the flexible direction of joint spare 51, the interval leaves on the first rotation shell 12 and is equipped with first draw-in groove 123 and second draw-in groove 124, and under the expansion mode, partly card of joint spare 51 is in first draw-in groove 123 and second draw-in groove 124 respectively. In the application, by arranging the rotating shells which are matched and rotated at the two ends of the first connecting frame 11 and the third connecting frame 31, on the first hand, the first connecting frame 11 and the third connecting frame 31 are convenient to be provided with hinge points, the first connecting frame 11 and the third connecting frame 31 are convenient to rotate relatively, the rotating matching degree of the first rotating shell 12 and the second rotating shell 32 is high, on the second hand, the arrangement of the clamping and stopping points is convenient, the clamping and connecting piece 51 is clamped in the second clamping groove 124 and the first clamping groove 123 in sequence after being stretched, a stable triangle is formed between the clamping and connecting point formed by the clamping and connecting piece 51 and the first clamping groove 123 and the second clamping groove 124 and the three points of the second hinge point 112 (the fifth hinge point 311), so that the rotation of the second hinge point 112 is limited, further, the rotation of the sixth hinge point 312 on the third connecting frame 31 and the first hinge point 111 on the first connecting frame 11 is limited, and finally the rotation of the fourth hinge point 212 is also limited, the clip member 51 is clipped into the first clip groove 123 and the second clip groove 124 at the same time, so that a stable structure is formed.

In some embodiments of the present invention, as shown in fig. 2 and 4, the first rotating case 12 includes: sector plate 121 and connector 122, connector 122 connects on the circular arc edge of sector plate 121, as shown in fig. 3, the end of connector 122 towards sector plate 121 is equipped with first draw-in groove 123, and second draw-in groove 124 is established at the circular arc edge of sector plate 121, and second hinge point 112 is located the centre of a circle of sector plate 121.

Accordingly, as shown in fig. 2, one side of the second rotating case 32 is recessed to form a sector groove 321, the fifth hinge point 311 is located at the center of the sector groove 321, the sector plate 121 is fitted in the sector groove 321, and the snap-in member 51 is telescopically disposed in the second rotating case 32. The sector plate 121 and the sector groove 321 can form a rotating fit, which is beneficial to improving the fit degree of the first rotating shell 12 and the second rotating shell 32 after rotating, and reducing the gap between the two rotating shells. In some specific examples, in the design process, after the sector-shaped plate 121 is completely matched with the sector-shaped groove 321, the clamping member 51, the first clamping groove 123 and the second clamping groove 124 form a limit matching structure at the same time, so that a clamping limit matching structure is formed immediately after the rotation is finished, the clamping limit speed is increased, and the cooperative matching degree of the rotation and the clamping is improved.

Furthermore, the second rotating housing 32 is further provided with a telescopic channel 323 which penetrates toward the sector-shaped groove 321, the snap-in member 51 is partially located in the sector-shaped groove 321 and partially located in the telescopic channel 323, and the first elastic member is arranged in the telescopic channel 323. The telescopic channel 323 is communicated with the sector groove 321 in a penetrating manner, so that the clamping piece 51 can be conveniently clamped or separated from the clamping fit with the sector plate 121 and the connecting column 122 in the sector groove 321 after telescopic movement, an enough space is provided for telescopic movement of the clamping piece 51, and the clamping piece 51 can move smoothly and cannot be clamped on the second rotating shell 32 in the telescopic movement process. In addition, flexible passageway 323 provides the direction for the concertina movement of first elastic component for joint spare 51 is difficult for skew position and reacing fast and treat the joint position at concertina movement's in-process, promotes joint cooperation speed.

Advantageously, as shown in fig. 2 and 6, a guide groove 322 is provided on the bottom wall of the sector groove 321, and a part of the clip 51 is slidably provided in the guide groove 322. The guiding slot 322 further provides a guiding for the clip 51 during the telescopic movement, so that the clip 51 can be quickly matched with the first rotating shell 12 on the first connecting frame 31 along a predetermined track during the telescopic movement. The fan-shaped groove 321 is formed in the bottom wall of the guide groove 322, the inner wall of the part of the clamping piece 51 matched with the guide groove 322 is attached to the bottom wall of the guide groove 322, and the outer surface of the clamping piece 51 can be arranged to be flush with the top wall of the fan-shaped groove 321, so that the matching degree between the first rotating shell 12 and the second rotating shell 32 is improved.

In a specific example, in the expanded state, the second card slot 124, the guide slot 322, and the telescopic channel 323 are located on the same line. The second locking groove 124, the guiding groove 322 and the telescopic channel 323 which are in the same straight line can enable the locking piece 51 to be locked in place, a straight line is formed between the first connecting frame 11 and the second connecting frame 21, and meanwhile, connecting lines of the first hinge point 111, the second hinge point 112 and the sixth hinge point 312 are also in the same straight line, at this time, the four rotating points are combined into three rotating points, and finally a stable triangular structure is formed, so that the foldable frame 100 is in a stable unfolding state. The second slot 124, the guiding slot 322 and the retractable channel 323, which are arranged in a straight line, also make the clip member 51 more smooth and fast in extension and retraction.

Alternatively, as shown in fig. 3 and 5, the clip 51 has an elongated sheet shape, and the clip 51 forms a boss 511 on a portion located in the telescopic passage 323. In the unfolded state, the front end of the clip member 51 extends out of the fan-shaped groove 321 and is clipped in the second clip groove 124, and the boss 511 extends out of the telescopic channel 323 and is clipped in the first clip groove 123. The two side surfaces of the long strip sheet-shaped clamping piece 51 are relatively flat, so that the structure which is contacted with the side surfaces of the clamping piece 51 in the telescopic motion process enables the telescopic motion process of the clamping piece 51 to be more stable; the thickness of the whole clamping piece 51 can be thinner by the strip-shaped sheet-shaped clamping piece 51, so that the structural strength of the clamping piece 51 is guaranteed, and the total thickness of the first rotating shell 12 and the second rotating shell 32 during design can be reduced.

Optionally, as shown in fig. 4 and 5, the clamping member 51 is provided with an accommodating groove 512 penetrating in the thickness direction, the first elastic member is disposed in the accommodating groove 512, and the clamping assembly 5 further includes: and a pin (not shown) which passes through the receiving groove 512 and is connected to the second rotating case 32 at both ends, and the rear end of the first elastic member abuts against the pin. At this time, when the second rotating case 32 rotates, the pin connected thereto will drive the clip member 51 and the first elastic member to rotate, and the pin provides an end portion limitation for the compression of the first elastic member.

Advantageously, the first elastic member is a cylindrical spring, the diameter of the cylindrical spring is larger than the thickness of the clamping member 51, and the diameter of the cylindrical spring is designed to be larger than the thickness of the clamping member 51, so that the cylindrical spring can form elastic restoring force on the end portion of the whole clamping member 51.

Advantageously, as shown in fig. 7, the opposite inner walls of the telescopic channel 323 are provided with half-moon grooves 325 matching with the cylindrical springs. In these structures, the half moon groove 325 provides a limit for the cylindrical spring so that the cylindrical spring is always maintained in the telescopic passage 323, and further so that one end of the catching piece 51 is always fitted in the telescopic passage 323 of the second rotating case 32, preventing the catching piece 51 from being disengaged from the second link frame 21. In addition, the half-moon groove 325 may also facilitate the assembly of the cylindrical spring into the telescopic passage 323 and the receiving groove 512, and both ends of the cylindrical spring form free ends and leave margins, thereby improving the convenience of assembly and the stability of fitting. Half moon groove 325 can also restrict cylindrical spring's extension limit and compression limit to further inject cylindrical spring to the effort of joint spare 51, and make the stable joint of joint spare 51 on first draw-in groove 123 and second draw-in groove 124, make joint spare 51 be difficult for rocking at concertina movement's in-process simultaneously stably.

Optionally, the end of the stud 122 forms a slot opening toward the third connecting frame 31, the slot forms a second slot 124, and when the clip 51 extends forward into the second slot 124, the stud 122 forms a rotation limit for the clip 51. The first elastic member is in an extended state, and the clip member 51 is inserted into the second clip groove 124.

Advantageously, one of the first rotating housing 12 and the second rotating housing 32 is provided with an arc-shaped rotating groove 324, the arc-shaped rotating groove 324 is arc-shaped and has a center at the second hinge point 112, and the other of the first rotating housing 12 and the second rotating housing 32 is provided with a protrusion 125 slidably fitted in the arc-shaped rotating groove 324. For example, in the specific example, as shown in fig. 2 and 3, the second rotating shell 32 is provided with an arc-shaped rotating groove 324, the first rotating shell 12 is provided with a protrusion 125, and the sliding fit between the protrusion 125 and the arc-shaped rotating groove 324 provides a guide for the first rotating shell 12 to rotate relative to the second rotating shell 32, so that the rotating process between the first rotating shell 12 and the second rotating shell 32 is smoother.

In some embodiments of the present invention, as shown in fig. 1 and 2, foldable frame 100 further comprises: the locking assembly 6, the locking assembly 6 includes the locking piece 61 and the serging 62 that is equipped with the lockhole 621, and one in the locking piece 61 and the serging 62 is established on the second link 21, and another in the locking piece 61 and the serging 62 is established on the third link 31, and under the state of accomodating, the locking piece 61 cooperates in the lockhole 621. For example, in the specific example shown in fig. 1, the locking edge 62 is provided on the second connecting frame 21, the locking block 61 is provided on the third connecting frame 31, and when the clamping member 51 is disengaged from the first connecting frame 11, the foldable frame 100 is in the folded state, and the final positioning and locking will be realized through the cooperation of the locking block 61 and the locking edge 62, so that the foldable frame 100 is stably kept in the folded state.

The locking assembly 6 may also be replaced by a hook, the hook is disposed on the second connecting frame 21 or one of the third connecting frames 31, and the locking hole is disposed on the second connecting frame 21 or the other of the third connecting frames 31, which is not limited to the locking limiting structure in the storage state.

In some embodiments of the present invention, as shown in fig. 1, the front foot assembly 1 includes two first connecting frames 11 arranged in parallel, the rear end of each first connecting frame 11 is correspondingly equipped with a set of the second connecting frame 21, the third connecting frame 31, the support rod assembly 4 and the detent assembly 5, and the lifting portion 53 of the two sets of the detent assemblies 5 is located on the handle assembly 3. In these examples, the entire frame that forms the foldable frame 100 will be able to stand independently and form a certain accommodation space between the two sets of brackets, which improves the practicability of the foldable frame 100. Only when two lifting parts 53 are lifted upwards simultaneously and the clamping pieces 51 on the left side and the right side are separated from the clamping connection with the first rotating shell 12, the foldable frame 100 in the unfolded state can be unlocked and rotationally switched to the storage state, and therefore, the two groups of first connecting frames 11, second connecting frames 21, third connecting frames 31, supporting rod assemblies 4 and clamping assemblies 5 are arranged, so that the stability of the whole foldable frame 100 in the unfolded state is stronger, and the partial retraction is not easy to occur.

Optionally, the third bracket 31 of the handle bar assembly 3 is provided with a pulling hole along the length direction thereof, and the pulling portion 53 is slidably fitted in the pulling hole, and the pulling hole provides a limit to the movable distance of the pulling portion 53.

Optionally, as shown in fig. 1, the rear foot assembly 2 includes a linkage rod 22, the linkage rod 22 is disposed between the two sets of second connecting frames 21, the linkage rod 22 enables linkage between the two sets of second connecting frames 21, and at the same time, the foldable frame 100 having the two sets of first connecting frames 11, second connecting frames 21, third connecting frames 31, support rod assemblies 4 and clamping assemblies 5 forms linkage, and is convenient to unfold or store.

Correspondingly, as shown in fig. 2, the front foot assembly 1 further includes a connecting rod 13, and two ends of the connecting rod 13 are respectively connected to two ends of the two sets of first connecting frames 11, and form the stable and interlockable front foot assembly 1.

In some embodiments of the present invention, as shown in fig. 2, the supporting rod assembly 4 includes a first supporting rod 41, a second supporting rod 42 and a second elastic member 43, which are sleeved with each other, one end of the first supporting rod 41 is connected to the fourth hinge point 212, the second supporting rod 42 is sleeved in the first supporting rod 41, the second elastic member 43 is connected between the second supporting rod 42 and the first supporting rod 41, and the other end of the second supporting rod 42 is connected to the sixth hinge point 312. When the support rod assembly 4 is supported between the third link 31 and the second link 21, the provision of the second elastic member 43 greatly enhances the shock resistance of the support rod assembly 4 and the shock-absorbing effect of the foldable frame 100.

Optionally, as shown in fig. 4, the first supporting rod 41 is provided with a limiting through hole 411 in the length direction, as shown in fig. 2, the second supporting rod 42 is connected with a limiting rod 44, and the limiting rod 44 is in limiting fit in the limiting through hole 411. The first support bar 41 and the second support bar 42 are connected by the stopper bar 44, and the first support bar 41 and the second support bar 42 are prevented from being separated from each other.

Advantageously, the limiting through hole 411 extends along the length direction of the first support rod 41, so that when the second support rod 42 vibrates relative to the first support rod 41, the limiting rod 44 limits and guides the movement of the second support rod 42 relative to the first support rod 41.

The foldable frame 100 of the present invention may be used in a stroller 200.

A cart 200, as shown in fig. 8 and 9, comprises a foldable frame 100, wherein the foldable frame 100 is the foldable frame 100, when the cart 200 is provided with the foldable frame 100, the cart is very stable in an unfolded state, is not easy to collapse, and is easy to switch the unfolded state or the storage state.

Optionally, as shown in fig. 8, the cart 200 further includes a wheel assembly 220, the wheel assembly 220 facilitating movement of the entire cart 200 in the expanded state.

Optionally, as shown in fig. 9, the cart 200 further comprises a cradle assembly 210, the foldable frame 100 comprises two sets of the first connecting frame 11, the second connecting frame 21, the third connecting frame 31, the support rod assembly 4 and the locking assembly 5, and the cradle assembly 210 is rotatably connected to the handle assembly 3. The cradle assembly 210 can be used to carry an infant or cargo, enhancing the overall utility of the cart 200.

The specific structure of the foldable frame 100 according to the specific embodiment of the present invention will be described with reference to the drawings. The embodiments of the present invention may be all embodiments in which a plurality of the aforementioned technical solutions are combined, and are not limited to the following specific embodiments.

Example 1

A foldable frame 100, comprising: as shown in fig. 1 and 2, the method includes: the front foot assembly 1, the rear foot assembly 2, the handle assembly 3, the support rod assembly 4 and the clamping assembly 5 (the structure of the clamping assembly 5 is shown in figure 2).

As shown in fig. 1, the front leg assembly 1 includes a first link frame 11, the first link frame 11 extends obliquely upward from front to rear, and as shown in fig. 2, the first link frame 11 is provided with a first hinge point 111 and a second hinge point 112 spaced from each other from front to rear. The rear leg assembly 2 includes a second connecting frame 21, the second connecting frame 21 extends from front to back in a downward inclination manner, as shown in fig. 2, a third hinge point 211 and a fourth hinge point 212 are sequentially arranged on the second connecting frame 21 from top to bottom, and the third hinge point 211 is connected with the first hinge point 111.

As shown in fig. 1, the handlebar assembly 3 includes a third connecting frame 31, and as shown in fig. 2, a fifth hinge point 311 and a sixth hinge point 312 are sequentially disposed on the third connecting frame 31 from front to back, and the fifth hinge point 311 is connected to the second hinge point 112.

As shown in fig. 2, one end of the support rod assembly 4 is connected to the fourth hinge point 212, and the other end of the support rod assembly 4 is connected to the sixth hinge point 312. This will create two pivot points at the ends of the support rod assembly 4.

As shown in fig. 2 and 4, the detent assembly 5 includes: the connecting device comprises a clamping piece 51, a first elastic piece (not shown in the figures) and a lifting part 53, wherein the clamping piece 51 is arranged on the third connecting frame 31 in a sliding manner along the length direction of the third connecting frame 31, the first elastic piece is connected between the clamping piece 51 and the third connecting frame 31, the first elastic piece is used for driving the clamping piece 51 to slide towards the direction of clamping into the first connecting frame 11, the lifting part 53 is connected with the clamping piece 51, and the lifting part 53 is used for lifting the clamping piece 51 to be separated from the first connecting frame 11.

Wherein, the foldable frame 100 has an unfolded state and a stored state, and in the unfolded state, at least two positions of the clamping pieces 51 are clamped on the first connecting frame 11 to limit the rotation between the first connecting frame 11 and the third connecting frame 31. In the storage state, the engaging member 51 is disengaged from the first connecting frame 11, the upper end of the third connecting frame 31 is drawn toward the lower end of the second connecting frame 21, and the lower end of the second connecting frame 21 is drawn toward the lower end of the first connecting frame 11.

Example 2

A foldable frame 100, different from embodiment 1, in embodiment 1, as shown in fig. 2, a first rotating shell 12 is provided at the rear end of a first connecting frame 11, a second hinge point 112 is provided on the first rotating shell 12, a second rotating shell 32 is provided at the front end of a third connecting frame 31, and a fifth hinge point 311 is provided on the second rotating shell 32.

As shown in fig. 2 and 4, the first rotating case 12 includes: sector plate 121 and connector 122, connector 122 connects on the circular arc edge of sector plate 121, as shown in fig. 3, the end of connector 122 towards sector plate 121 is equipped with first draw-in groove 123, and second draw-in groove 124 is established at the circular arc edge of sector plate 121, and second hinge point 112 is located the centre of a circle of sector plate 121. As shown in fig. 2, one side of the second rotating case 32 is recessed to form a sector groove 321, the fifth hinge point 311 is located at the center of the sector groove 321, the sector plate 121 is fitted in the sector groove 321, and the snap-in member 51 is telescopically arranged in the second rotating case 32. The second rotating housing 32 is further provided with a telescopic channel 323 which penetrates towards the sector-shaped groove 321, the clamping member 51 is partially positioned in the sector-shaped groove 321 and partially positioned in the telescopic channel 323, and the first elastic member is arranged in the telescopic channel 323.

Example 3

A foldable frame 100 is different from embodiment 2 in that, on the basis of embodiment 2, as shown in fig. 3 and 5, a clip member 51 is in the shape of a long strip sheet, and the clip member 51 forms a boss 511 at a portion located in a telescopic passage 323. In the unfolded state, the front end of the clip member 51 extends out of the fan-shaped groove 321 and is clipped in the second clip groove 124, and the boss 511 extends out of the telescopic channel 323 and is clipped in the first clip groove 123.

Example 4

A foldable frame 100, different from embodiment 1, in that on the basis of embodiment 1, the foldable frame 100 further includes: the locking assembly 6, the locking assembly 6 includes the locking piece 61 and the serging 62 that is equipped with the lockhole 621, and one in the locking piece 61 and the serging 62 is established on the second link 21, and another in the locking piece 61 and the serging 62 is established on the third link 31, and under the state of accomodating, the locking piece 61 cooperates in the lockhole 621.

Example 5

Different from the embodiment 1, in the foldable frame 100, on the basis of the embodiment 1, as shown in fig. 1, the front foot assembly 1 includes two first connecting frames 11 arranged in parallel, a group of second connecting frames 21, a group of third connecting frames 31, a group of support rod assemblies 4 and a group of position clamping assemblies 5 are correspondingly assembled at the rear end of each first connecting frame 11, and the lifting parts 53 of the two groups of position clamping assemblies 5 are positioned on the handlebar assembly 3. As shown in fig. 1, the rear foot assembly 2 includes a linkage rod 22, and the linkage rod 22 is disposed between two groups of second connecting frames 21.

Example 6

A foldable carriage 100, which is applied to a cart 200 in addition to embodiment 5, constitutes a main body frame of the cart 200.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Other configurations of a foldable frame 100 according to embodiments of the present invention, such as the addition of other accessories to the cart 200 to form a multi-function cart 200, are known to those of ordinary skill in the art, and other accessories may be added as desired and will not be described in detail herein.

In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.