CN215475321U - Folding frame for controlling opening of supporting frame by utilizing seat assembly and baby carriage comprising same - Google Patents

Abstract

The utility model discloses a folding frame for controlling a support frame to be opened by utilizing a seat component and a baby carrier comprising the folding frame, wherein the folding frame comprises: a first support frame; the second support frame is rotatably arranged on the first support frame and can be rotatably folded or unfolded relative to the first support frame; the seat component is rotatably arranged on the first support frame and can rotate relative to the first support frame to fold or unfold; and a first locking and unlocking device; when the second support frame and the seat component are folded relative to the first support frame, the first locking and unlocking device can lock the first support frame and the second support frame so as to limit the first support frame and the second support frame to rotate and open relatively; the first locking and unlocking device is configured to unlock the first support frame and the second support frame when the seat assembly is opened relative to the first support frame, so that the second support frame can be rotated and opened relative to the first support frame. After the first support frame and the second support frame are folded, the first support frame and the second support frame cannot be opened easily, and certain stability and safety are achieved.

Description

Folding frame for controlling opening of supporting frame by utilizing seat assembly and baby carriage comprising same

Technical Field

The utility model relates to a folding rack technology, in particular to a folding rack for controlling a support frame to be opened by utilizing a seat component and a baby carrier comprising the folding rack.

Background

Existing strollers typically include a folding leg that serves as the frame body. The folding frame is provided with a seat assembly, and the seat assembly is used for riding a child. The folding leg includes a plurality of support frames, can rotate between the support frame and fold up to reduce whole car volume, conveniently carry. The folding frame has the advantages that the structure is not stable enough after the support frames are folded, the support frames are easily opened by mistake, the support frames are used as main supports of the whole vehicle, the weight of the whole vehicle is loaded, the size and the weight of the support frames are large, and the folded support frames are easy to cause certain dangerousness if being opened accidentally in the use or transportation process and are easy to damage products.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. To this end, the utility model provides a folding frame which controls the opening of the supporting frame by using a seat component.

The utility model also provides a baby carriage with the folding frame.

According to a first aspect of the utility model, a folding leg for controlling the opening of a support frame by a seat assembly comprises: a first support frame; the second support frame is rotatably arranged on the first support frame and can be rotatably folded or unfolded relative to the first support frame; the seat component is rotatably arranged on the first support frame and can rotate relative to the first support frame to fold or unfold; and a first locking and unlocking device; when the second support frame and the seat assembly are folded relative to the first support frame, the first locking and unlocking device can lock the first support frame and the second support frame so as to limit the first support frame and the second support frame to be opened in a relative rotation mode; the first locking and unlocking device is configured to unlock the first support frame and the second support frame when the seat assembly is opened relative to the first support frame, so that the second support frame can be rotated and opened relative to the first support frame.

The folding rack provided by the embodiment of the utility model has at least the following beneficial effects: the folding frame can lock the first support frame and the second support frame through the first locking and unlocking device after the second support frame and the seat assembly are folded, the first locking and unlocking device utilizes the opening of the seat assembly as an unlocking condition, and if the first support frame and the second support frame are to be opened, the seat assembly needs to be rotated and opened in advance. The folding frame utilizes the first locking and unlocking device to lock the supporting frame, skillfully utilizes the opening of the seat assembly as an unlocking condition, the first supporting frame and the second supporting frame cannot be opened easily after being folded, and the folding frame has certain stability and safety.

According to some embodiments of the utility model, the first locking and unlocking device comprises a moving block, a first link, and a second link; the first support frame comprises a main rod body, the moving block is movably arranged on the main rod body and can move along the length direction of the main rod body, one end of the first connecting rod is hinged to the moving block, the other end of the first connecting rod is hinged to the seat assembly, and the first support frame, the seat assembly, the first connecting rod and the moving block form a first rocker-slider mechanism; one end of the second connecting rod is hinged to the moving block, the other end of the second connecting rod is hinged to the second supporting frame, and the first supporting frame, the second connecting rod and the moving block form a second rocker-slider mechanism; when the second support frame and the seat component are folded relative to the first support frame, the main rod body is parallel to a plane where the hinge axes at the two ends of the first connecting rod are located.

According to some embodiments of the utility model, when the second support frame and the seat assembly are folded relative to the first support frame, the plane on which the hinge axes of the two ends of the second link lie forms an included angle greater than 0 ° with the main rod body.

According to some embodiments of the utility model, the locking device further comprises a second locking and unlocking device, and the second locking and unlocking device is configured to lock the relative positions of the second support frame and the first support frame so that the second support frame and the first support frame can be kept in an opening state.

According to some embodiments of the utility model, the second locking and unlocking device comprises: the handle comprises a handle frame, a locking mechanism, a rotation limiting structure and an unlocking mechanism; the handle frame, the first support frame and the second support frame are coaxially and rotatably arranged, the handle frame can be rotatably folded or unfolded relative to the first support frame, the locking mechanism is arranged on the handle frame and the first support frame, the locking mechanism is configured to lock the relative positions of the handle frame and the first support frame when the handle frame is unfolded relative to the first support frame, the rotation limiting structure is arranged on the handle frame and the second support frame, when the handle frame and the second support frame are unfolded relative to the first support frame, the rotation limiting structure limits the second support frame to the opening position and limits the second support frame to rotate towards the folding direction, and when the handle frame is rotated towards the folding direction, the second support frame can be rotated towards the folding direction relative to the first support frame, the unlocking mechanism is arranged on the handle frame and used for unlocking the locking mechanism.

According to some embodiments of the utility model, the locking mechanism comprises: the radial movable block, the first elastic piece, the limiting part and the rotary abdicating groove are arranged on the base; the radial movable block is movably arranged on the handle frame and limited in radial movement along the rotation axis of the handle frame, the radial movable block and the handle frame are limited in rotation together, the radial movable block is provided with a locking position and an unlocking position, the radial movable block is provided with a locking part, the limiting part and the rotary abdicating groove are arranged on the first support frame, the first elastic piece is arranged on the handle frame and used for driving the radial movable block to return to the locking position, when the radial movable block is positioned at the locking position, the locking part and the limiting part are abutted against and matched to limit the radial movable block and the handle frame to rotate towards the folding direction, when the radial movable block is positioned at the unlocking position, the locking part can rotate in the rotary abdicating groove so as to ensure that the handle frame can rotate relative to the first support frame to fold, the unlocking mechanism is configured to drive the radially movable block from the locked position into the unlocked position.

According to some embodiments of the present invention, the handle frame includes a base rod body and a telescopic rod, the base rod body is coaxially and rotatably disposed with the first support frame and the second support frame, the radial movable block and the first elastic member are disposed on the base rod body, the telescopic rod is movably disposed on the base rod body and can telescopically move relative to the base rod body, the unlocking mechanism includes a pushing block disposed on the telescopic rod, and the pushing block can push the radial movable block to move to the unlocking position when the telescopic rod retracts relative to the base rod body.

According to some embodiments of the present invention, the rotation limiting structure includes a first rotation limiting block and a second rotation limiting block respectively disposed on the handle frame and the second support frame, the first rotation limiting block and the second rotation limiting block are circumferentially arranged, and when the handle frame and the second support frame are opened relative to the first support frame, the second rotation limiting block and the first rotation limiting block abut against and cooperate to limit the second support frame to rotate in the folding direction.

According to some embodiments of the utility model, the seat assembly comprises a base rotatably disposed to the first support frame, the seat assembly is engaged with the first locking and unlocking device through the base, and a seat body rotatably disposed to the base and rotatable along a vertical axis; the base and the seat body are provided with a rotary positioning mechanism, the rotary positioning mechanism comprises a positioning piece, a second elastic piece and at least two gear parts, the positioning piece is movably arranged on the base and can move along the radial direction of the rotation axis of the seat body, the gear parts are arranged on the seat main body and distributed along the circumferential direction of the rotating axis, the second elastic piece is arranged on the base and is used for driving the positioning piece to reset towards the rotating axis direction of the seat main body, when the positioning piece is opposite to the gear position part, the positioning piece can enter the position matched with the gear position part through the second elastic piece and limit the seat main body to rotate relative to the base, when the positioning piece moves towards the direction far away from the rotation axis of the seat main body, the positioning piece can be disengaged from the gear position part; the seat body is foldable.

A stroller according to a second aspect of the present invention comprises any of the folding legs described above, and wheels are provided on each of the first and second support frames.

The baby carriage provided by the embodiment of the utility model has at least the following beneficial effects: due to the adoption of the folding frame, the first support frame and the second support frame cannot be easily opened after being folded, and certain stability and safety are realized.

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

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 perspective view of a stroller having a folding leg according to an embodiment of the present invention in an open position;

FIG. 2 is a side view of a stroller folding leg according to an embodiment of the present invention during folding;

FIG. 3 is a side view of the folding leg of the stroller in a folded configuration according to an embodiment of the present invention;

FIG. 4 is an exploded view of the structure shown in FIG. 1;

FIG. 5 is an enlarged view of FIG. 4 at D;

FIG. 6 is a schematic structural diagram of the radial movable block in the locked position according to the embodiment of the present invention;

FIG. 7 is a schematic view of an embodiment of the radial movable block in an unlocked position;

FIG. 8 is an exploded view of a handle bar according to an embodiment of the present invention;

FIG. 9 is a partial schematic view of a second support frame according to an embodiment of the present invention;

FIG. 10 is a side view of a stroller having a folding leg according to an embodiment of the present invention in an open position;

FIG. 11 is an enlarged view at E of FIG. 10;

FIG. 12 is an exploded schematic view of a seat assembly according to an embodiment of the present invention;

fig. 13 is a perspective view of the folded seat body according to the embodiment of the present invention.

Reference numerals:

a first support frame 100, a main rod body 110 and a limiting block 120;

a second support 200;

the seat assembly 300, the base 310, the seat body 320, the rotary positioning mechanism 330, the positioning member 331, the second elastic member 332, and the gear position part 333;

a first locking and unlocking means 400, a moving block 410, a first link 420, a second link 430;

the locking device comprises a second locking and unlocking device 500, a handle frame 510, a base rod body 511, an expansion rod 512, a locking mechanism 520, a radial movable block 521, a locking part 5211, a first elastic piece 522, a limiting part 523, a rotary abdicating groove 524, a rotary limiting structure 530, a first rotary limiting block 531, a second rotary limiting block 532, an unlocking mechanism 540, a pushing block 541 and an unlocking operation piece 542.

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 should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1, the stroller includes a folding leg, which also serves as a main frame of the entire stroller, and the folding leg includes: a first support bracket 100, a second support bracket 200, a seat assembly 300, and a first locking and unlocking device 400. The second supporting frame 200 is rotatably disposed on the first supporting frame 100 and can be folded or unfolded with respect to the first supporting frame 100. The seat assembly 300 is rotatably disposed on the first support frame 100 and can be folded or unfolded with respect to the first support frame 100. When the second support frame 200 and the seat assembly 300 are folded relative to the first support frame 100, the first locking and unlocking device 400 can lock the first support frame 100 and the second support frame 200 to limit the first support frame 100 and the second support frame 200 from being opened by relative rotation; the first locking and unlocking device 400 is configured to unlock the first support frame 100 and the second support frame 200 when the seat assembly 300 is opened relative to the first support frame 100, so that the second support frame 200 can be rotated open relative to the first support frame 100. In this embodiment, the second supporting frame 200 and the seat assembly 300 can be rotatably connected to the first supporting frame 100 by the matching of the rotating shaft and the pivot hole, and of course, other suitable connecting structures can be adopted without being limited to the embodiment of this embodiment, and many connecting structures are available in the art to realize the rotatable arrangement of one member and another member, and those skilled in the art can select them according to the needs.

Referring to fig. 2, when the folding frame is folded, the second support frame 200 and the entire seat assembly 300 are folded by rotating toward the first support frame 100, thereby completing the folding. The folded state is shown in fig. 3. In the folding stand, after the second supporting frame 200 and the seat assembly 300 are folded, the first locking and unlocking device 400 can lock the first supporting frame 100 and the second supporting frame 200, and the first locking and unlocking device 400 uses the opening of the seat assembly 300 as a condition for unlocking, so that the seat assembly 300 needs to be rotated and opened in advance when the first supporting frame 100 and the second supporting frame 200 are opened. The folding rack utilizes the first locking and unlocking device 400 to lock the supporting frames, skillfully utilizes the opening of the seat assembly 300 as an unlocking condition, the first supporting frame 100 and the second supporting frame 200 cannot be opened easily after being folded, and the folding rack has certain stability and safety, if the first supporting frame 100 and the second supporting frame 200 are to be opened, the first supporting frame 100 and the second supporting frame 200 can be opened according to a specific mode, namely the seat assembly 300 is opened first, the design is ingenious, and the probability of accidental opening of the folding rack is low.

Referring to fig. 1, in the present embodiment, the first locking and unlocking device 400 includes a moving block 410, a first link 420, and a second link 430. The first support frame 100 includes a main rod body 110, and the moving block 410 is movably disposed on the main rod body 110 and can move along the length direction of the main rod body 110. The moving block 410 is provided with a sleeve hole, the sleeve hole is adapted to the main rod body 110, and the moving block 410 is slidably sleeved on the main rod body 110 through the sleeve hole, however, it is conceivable that the moving block 410 may also be movably disposed on the main rod body 110 through other suitable connecting structures, for example, the main rod body 110 is provided with a sliding groove extending along the length direction of the main rod body 110, and the moving block 410 is slidably disposed in the sliding groove, so that the above-mentioned connection relationship can be achieved. One end of the first link rod 420 is hinged to the moving block 410, and the other end is hinged to the seat assembly 300, and the first support frame 100, the seat assembly 300, the first link rod 420 and the moving block 410 form a first rocker-slider mechanism; one end of the second connecting rod 430 is hinged to the moving block 410, and the other end is hinged to the second supporting frame 200, and the first supporting frame 100, the second supporting frame 200, the second connecting rod 430 and the moving block 410 form a second rocker-slider mechanism. In this embodiment, the first link 420 and the second link 430 are both provided in pairs, so that the mechanism is balanced and stable, and of course, it is conceivable that one or more than two first links 420 and two second links 430 may be provided, and the first links 420 and the second links 430 may be specifically provided according to needs.

When the folding frame is folded, if the second supporting frame 200 is driven to rotate and fold, the second supporting frame 200 drives the moving block 410 to move along the main rod body 110 through the second connecting rod 430, and the moving block 410 moves to drive the whole seat assembly 300 to rotate and fold through the first connecting rod 420, so that the linked folding is realized, and the operation is convenient. In this embodiment, in order to enable the stability of the first support frame 100 and the second support frame 200 after being opened, the main rod body 110 is provided with the limit block 120, the limit block 120 is used for limiting a limit position of the moving block 410, and after the first support frame 100 and the second support frame 200 are opened, the moving block 410 abuts against the limit block 120 to form a supporting point, so that the stability of the first support frame 100 and the second support frame 200 after being opened is improved.

In the present embodiment, when the second support frame 200 and the seat assembly 300 are folded relative to the first support frame 100, the main rod 110 is parallel to the plane of the hinge axis of the two ends of the first link 420. Referring to fig. 3, the central axis of the main shaft body 110 is indicated by a reference symbol a, the plane of the hinge axes at the two ends of the first link 420 is indicated by a reference symbol B, and the plane B passes through the hinge axes at the two ends of the first link 420, wherein a is parallel to B. Through the above arrangement, when the second support frame 200 and the seat assembly 300 are folded relative to the first support frame 100, since the moving block 410 is pushed by the first link 420 and cannot move in the direction that the second support frame 200 is opened, the first rocker-slider mechanism is at the dead point position, and the second support frame 200 cannot rotate relative to the first support frame 100 to be opened, thereby forming the locking of the folded state. When the folding frame needs to be opened, the seat assembly 300 needs to be opened first, and the first connecting rod 420 drives the moving block 410 to move to remove the dead point position, so that the whole folding frame is opened. The first locking and unlocking device 400 for locking and unlocking has the advantages of simple structure, ingenious design and easy implementation, and simultaneously has the function of enabling the second support frame 200 and the seat assembly 300 to be folded in a linkage manner. Of course, in other embodiments, the first locking and unlocking device 400 may also be configured in other suitable structures, such as a latch mechanism, which locks the first support frame 100 and the second support frame 200 when the second support frame 200 and the seat assembly 300 are folded relative to the first support frame 100, the seat assembly 300 cooperates with the latch mechanism to keep the latch mechanism locked, and the latch mechanism loses its locking function after the seat assembly 300 is rotated and opened, so as to unlock the seat assembly.

In this embodiment, in order to facilitate the opening of the seat assembly 300, when the second support frame 200 and the seat assembly 300 are folded relative to the first support frame 100, the plane of the hinge axes at the two ends of the second link 430 forms an included angle greater than 0 ° with the main rod 110. Referring to fig. 3, the plane of the hinge axes at the two ends of the second link 430 is shown as reference C, the angle between the plane C and the axis a is β, β is greater than 0 °, so that the second rocker-slider mechanism is not in the dead-center position state when the second supporting frame 200 is folded, and the opening of the seat assembly 300 is not affected.

In the present embodiment, a second locking and unlocking device 500 is further included, and the second locking and unlocking device 500 is configured to lock the relative positions of the second support stand 200 and the first support stand 100, so that the second support stand 200 and the first support stand 100 can be maintained in the open state. By arranging the second locking and unlocking device 500, the opening positions of the second support frame 200 and the first support frame 100 can be locked, the random change or accidental folding of the two support frames can be avoided, and the use stability of the folding frame can be improved.

Referring to fig. 4, in the present embodiment, the second locking and unlocking device 500 includes: a handle frame 510, a locking mechanism 520, a rotation limiting structure 530 and an unlocking mechanism 540; the handle frame 510, the first support frame 100 and the second support frame 200 are coaxially and rotatably arranged, the handle frame 510 can be rotatably folded or unfolded relative to the first support frame 100, the locking mechanism 520 is arranged on the handle frame 510 and the first support frame 100, the locking mechanism 520 is configured to be capable of being opened relative to the first support frame 100 when the handle frame 510 is opened, locking the relative positions of the handle frame 510 and the first support frame 100, the rotation limiting structure 530 is arranged on the handle frame 510 and the second support frame 200, when the handle frame 510 and the second supporting frame 200 are opened with respect to the first supporting frame 100, the rotation limiting structure 530 limits the second supporting frame 200 to the opened position and limits the second supporting frame 200 to rotate toward the folded direction, when the handle frame 510 is rotated in the folding direction, the second supporting frame 200 can be rotated in the folding direction relative to the first supporting frame 100, and the unlocking mechanism 540 is disposed on the handle frame 510 and is used for unlocking the locking mechanism 520. In the present embodiment, the handle frame 510, the first support frame 100 and the second support frame 200 are pivotally connected together through a main shaft, but other suitable structures may be adopted to form a relative rotation connection between the handle frame 510, the first support frame 100 and the second support frame 200, and in the art, many embodiments of the relative rotation connection between the two components are implemented, which is not illustrated here.

When the folding stand is opened, the second support stand 200 is maintained in an opened state with respect to the handle stand 510 by the rotation limiting structure 530, and the handle stand 510 is maintained in an opened state with respect to the first support stand 100 by the locking mechanism 520, so that the first support stand 100, the second support stand 200, and the handle stand 510 are stably maintained in the opened state. When the folding frame needs to be folded, the locking between the handle frame 510 and the first support frame 100 is firstly released through the unlocking mechanism 540, so that the handle frame 510 can be rotated and folded relative to the first support frame 100, and when the handle frame 510 is rotated towards the folding direction, the second support frame 200 is folded along the trend, and then the folding of the folding frame is completed. The folding rack with the structure has the advantages of ingenious design and concise structure.

Referring to fig. 5 to 7, in the present embodiment, the lock mechanism 520 includes: the radial movable block 521, the first elastic piece 522, the limit part 523 and the rotation abdicating groove 524; the radial movable block 521 is movably disposed on the handle frame 510 and limited to radial movement along the rotation axis of the handle frame 510, and the radial movable block 521 and the handle frame 510 are limited to rotate together. Specifically, the handle frame 510 is provided with a sliding slot extending radially, and the radial movable block 521 is slidably disposed in the sliding slot, so as to realize radial movement and rotation of the two. Of course, it is conceivable that the radial movable block 521 may be movably connected to the handle frame 510 in a radial direction through other connecting structures, for example, the handle frame 510 is provided with a sliding block portion, the sliding block portion is in a bar shape and extends in a radial direction, and the sliding groove is provided on the radial movable block 521 corresponding to the sliding block portion. The radial movable block 521 has a locking position and an unlocking position, the radial movable block 521 is provided with a locking portion 5211, the limiting portion 523 and the rotation abdicating groove 524 are disposed on the first support frame 100, and the first elastic member 522 is disposed on the handle frame 510 and used for driving the radial movable block 521 to return to the locking position.

Referring to fig. 6, when the radial movable block 521 is at the locking position, the locking portion 5211 abuts against and cooperates with the limiting portion 523 to limit the radial movable block 521 and the handle frame 510 from rotating in the folding direction. Referring to fig. 7, when the radially movable block 521 is in the unlocked position, the locking portion 5211 can rotate in the rotation-avoiding groove 524, so that the handle frame 510 can rotate and fold relative to the first support frame 100. The unlocking mechanism 540 is configured to drive the radially movable block 521 from the locked position to the unlocked position. The locking mechanism 520 with the above structure is simple in structure and easy to implement. In the embodiment, the first elastic member 522 is specifically a spring, but other suitable elastic members, such as a torsion spring, may be adopted. In this embodiment, two locking portions 5211 are disposed at two ends of the radial movable block 521, and two limiting portions 523 and two rotation abdicating grooves 524 are correspondingly disposed, but it is needless to say that one or more locking portions 5211 may be disposed, and the limiting portions 523 and the rotation abdicating grooves 524 may be disposed correspondingly, which may be specifically set according to actual situations. In other embodiments, the whole locking mechanism 520 may adopt other suitable structures, and there are many locking mechanisms for controlling the folding of the two racks in the field, and those skilled in the art can select the locking mechanism according to actual situations.

Referring to fig. 8, in the embodiment, the handle frame 510 includes a base rod 511 and an expansion link 512, the base rod 511 is coaxially and rotatably disposed with the first support frame 100 and the second support frame 200, the radial movable block 521 and the first elastic member 522 are disposed on the base rod 511, the expansion link 512 is movably disposed on the base rod 511 and can be extended and retracted relative to the base rod 511, the unlocking mechanism 540 includes a pushing block 541, the pushing block 541 is disposed on the expansion link 512, and the pushing block 541 can push the radial movable block 521 to move to the unlocking position when the expansion link 512 retracts relative to the base rod 511. In this embodiment, the base rod 511 is slidably provided with an intermediate member along the length direction, and when the telescopic rod 512 retracts, the pushing block 541 indirectly pushes the radial movable block 521 through the intermediate member, but in some embodiments, the pushing block 541 may also directly push the radial movable block 521 to move.

In this embodiment, a retractable locking mechanism is disposed between the retractable rod 512 and the base rod 511, the retractable rod 512 is locked by the retractable locking mechanism at two positions of extending out and retracting in the base rod 511, and the retractable locking mechanism may be an elastically retractable lock pin and is locked by a lock hole. In the present embodiment, an unlocking operation member 542 is provided to unlock the retractable latch mechanism. In this embodiment, the unlocking operation member 542 is specifically a button (or some handle mechanism may be adopted), and when the button is pressed down, the button drives the lock pin to retract through the pull rope structure, so that the lock pin is separated from the corresponding lock hole, and the telescopic rod 512 can freely extend and retract relative to the base rod body 511. Since the unlocking manipulating member 542 needs to be operated first when the telescopic rod 512 is retracted, the unlocking manipulating member 542 can be understood as a part of the unlocking mechanism 540. Of course, it is conceivable that in other embodiments, the unlocking by the unlocking operation member 542 may not be required, and the retractable locking mechanism between the retractable rod 512 and the base rod 511 may be configured to be unlocked by a certain external force, so that the retractable rod 512 can be directly retracted by applying a certain external force. In other embodiments, it is contemplated that the unlocking mechanism 540 may take on other configurations, such as a push button or a pull handle, as long as the radially movable block 521 is actuated to the unlocked position.

Referring to fig. 5 and 9, in the present embodiment, the rotation limiting structure 530 includes a first rotation limiting block 531 and a second rotation limiting block 532 respectively disposed on the handle frame 510 and the second support frame 200, and the first rotation limiting block and the second rotation limiting block 532 are arranged along the circumferential direction. It should be understood that the first and second rotation stoppers 532 are circumferentially arranged, which means that they are sequentially arranged in the circumferential direction of the rotation axis of the handle holder 510. Referring to fig. 10 and 11, when the handle frame 510 and the second supporting frame 200 are opened relative to the first supporting frame 100, the second rotation limiting block 532 abuts against and cooperates with the first rotation limiting block 531 to limit the second supporting frame 200 to rotate toward the folding direction. When the handle frame 510 is rotated to be folded, the first rotation limiting block 531 is rotated away from the second rotation limiting block 532, so as to be out of position, and the second supporting frame 200 can also be rotated to be folded along with the handle frame 510. The rotation limiting structure 530 is simple and easy to implement. In the embodiment shown in the drawings, the first rotation limiting block 532 and the second rotation limiting block 532 are provided in two sets, so that the limiting is more stable, and of course, it is conceivable that the first rotation limiting block 532 and the second rotation limiting block 532 may be provided in other numbers, which may be selected according to actual situations. In other embodiments, the rotation limiting structure 530 may also adopt other structures, and is not limited to the embodiment of the present embodiment, and there are many structures in the art for limiting the rotation position of one component relative to another component, and those skilled in the art can select the structure according to the needs.

Referring to fig. 12, in the present embodiment, the seat assembly 300 includes a base 310 and a seat main body 320, the base 310 is rotatably disposed on the first support frame 100, the seat assembly 300 is engaged with the first locking and unlocking device 400 through the base 310, and the seat main body 320 is rotatably disposed on the base 310 and can rotate along a vertical axis; the base 310 and the seat body 320 are provided with a rotational positioning mechanism 330, the rotational positioning mechanism 330 includes a positioning member 331, a second elastic member 332 and two shift portions 333, the positioning member 331 is movably disposed on the base 310 and can move along a radial direction of a rotation axis of the seat body 320, the shift portions 333 are disposed on the seat body 320 and are distributed along a circumferential direction of the rotation axis, the second elastic member 332 is disposed on the base 310 and is used for driving the positioning member 331 to return to a rotation axis direction of the seat body 320, when the positioning member 331 is opposite to the shift portions 333, the positioning member 331 can enter a position matched with the shift portions 333 through the second elastic member 332 and limit the seat body 320 to rotate relative to the base 310, and when the positioning member 331 moves in a direction away from the rotation axis of the seat body 320, the positioning member 331 can be disengaged from the shift portions 333. In the present embodiment, the second elastic member 332 is a spring, but in other embodiments, the second elastic member 332 may also be other suitable elastic members, such as a torsion spring, a tension spring, and so on.

When the rotating position of the seat body 320 needs to be adjusted, the positioning member 331 is pulled to disengage the positioning member 331 from the gear position portion 333, the seat body 320 is then rotated to another angular position, the positioning member 331 is released, and the second elastic member 332 drives the positioning member 331 to reset, so that the positioning member 331 engages with the gear position portion 333 at another position, and positioning is achieved.

Through the above structure, the seat body 320 can be rotated to adjust the position and positioned by the rotating positioning mechanism 330, thereby facilitating the use. In the present embodiment, the two shift position portions 333 are provided, and the two shift position portions 333 are spaced apart by 180 °, so that the seat main body 320 has two use positions, the angular difference between the two positions being 180 °. In other embodiments, more than two, for example, three shift portions 333 may be provided, and the difference between the positions of the three shift portions 333 may be set to 120 °, so as to realize three positions of use of the seat main body 320.

In this embodiment, the positioning portion 333 is a groove structure, and the positioning member 331 can be inserted into the groove structure to form a position limitation. Of course, it is conceivable that in other embodiments, the shift position portion 333 may be other structures, such as a protrusion, and the positioning member 331 is correspondingly provided with a recess adapted to the protrusion, so as to achieve the positioning function.

In this embodiment, the seat body 320 is foldable so that it has a smaller volume when folded, and the folded seat body 320 is shown in fig. 13.

In the embodiment shown in the drawings, a stroller is provided, and wheels are provided on the first support 100 and the second support 200. It is of course envisaged that the folding leg described above may be used in other configurations and is not limited to stroller applications, for example rocking chairs.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. A folding leg for controlling the opening of a support frame with a seat assembly, comprising:

a first support frame (100);

the second support frame (200) is rotatably arranged on the first support frame (100) and can be rotatably folded or unfolded relative to the first support frame (100);

the seat assembly (300) is rotatably arranged on the first support frame (100) and can be folded or unfolded in a rotating mode relative to the first support frame (100); and

a first locking and unlocking device (400); wherein,

when the second support frame (200) and the seat assembly (300) are folded relative to the first support frame (100), the first locking and unlocking device (400) can lock the first support frame (100) and the second support frame (200) to limit the first support frame (100) and the second support frame (200) from being opened in a relative rotation mode; the first locking and unlocking device (400) is configured to unlock the first support frame (100) and the second support frame (200) when the seat assembly (300) is opened relative to the first support frame (100), so that the second support frame (200) can be rotated to be opened relative to the first support frame (100).

2. A folding leg using a seat assembly to control the opening of a supporting frame according to claim 1, characterized in that said first locking and unlocking means (400) comprises a moving block (410), a first connecting rod (420) and a second connecting rod (430); the first support frame (100) comprises a main rod body (110), the moving block (410) is movably arranged on the main rod body (110) and can move along the length direction of the main rod body (110), one end of the first connecting rod (420) is hinged to the moving block (410), the other end of the first connecting rod is hinged to the seat assembly (300), and the first support frame (100), the seat assembly (300), the first connecting rod (420) and the moving block (410) form a first rocker-slider mechanism; one end of the second connecting rod (430) is hinged to the moving block (410) and the other end of the second connecting rod is hinged to the second supporting frame (200), and the first supporting frame (100), the second supporting frame (200), the second connecting rod (430) and the moving block (410) form a second rocker-slider mechanism; when the second support frame (200) and the seat assembly (300) are folded relative to the first support frame (100), the main rod body (110) is parallel to a plane on which the hinge axes of the two ends of the first connecting rod (420) are located.

3. A folding leg opening with a seat assembly according to claim 2, characterized in that when the second support frame (200) and the seat assembly (300) are folded relative to the first support frame (100), the plane of the hinge axes at both ends of the second connecting rod (430) forms an angle larger than 0 ° with the main rod body (110).

4. A folding leg for supporting frame opening with seat assembly according to claim 1, further comprising a second locking and unlocking device (500), wherein the second locking and unlocking device (500) is configured to lock the relative position of the second supporting frame (200) and the first supporting frame (100) so that the second supporting frame (200) and the first supporting frame (100) can be maintained in an open state.

5. A folding leg for controlling the opening of a supporting frame with a seat assembly according to claim 4, characterized in that said second locking and unlocking means (500) comprise: the handle comprises a handle frame (510), a locking mechanism (520), a rotation limiting structure (530) and an unlocking mechanism (540); the handle frame (510), the first support frame (100) and the second support frame (200) are coaxially and rotatably arranged, the handle frame (510) can be rotatably folded or unfolded relative to the first support frame (100), the locking mechanism (520) is arranged on the handle frame (510) and the first support frame (100), the locking mechanism (520) is configured to lock the relative positions of the handle frame (510) and the first support frame (100) when the handle frame (510) is unfolded relative to the first support frame (100), the rotation limiting structure (530) is arranged on the handle frame (510) and the second support frame (200), and when the handle frame (510) and the second support frame (200) are unfolded relative to the first support frame (100), the rotation limiting structure (530) limits the second support frame (200) to an unfolded position and limits the second support frame (200) to rotate towards a folding direction, when the handle frame (510) rotates towards the folding direction, the second support frame (200) can rotate towards the folding direction relative to the first support frame (100), and the unlocking mechanism (540) is arranged on the handle frame (510) and used for unlocking the locking mechanism (520).

6. The folding leg using a seat assembly to control a support frame opening according to claim 5, wherein the locking mechanism (520) comprises: the device comprises a radial movable block (521), a first elastic piece (522), a limiting part (523) and a rotary abdicating groove (524); the radial movable block (521) is movably arranged on the handle frame (510) and limited to radial movement along a rotation axis of the handle frame (510), the radial movable block (521) and the handle frame (510) are limited to rotate together, the radial movable block (521) is provided with a locking position and an unlocking position, a locking part (5211) is arranged on the radial movable block (521), the limiting part (523) and the rotary abdicating groove (524) are arranged on the first support frame (100), the first elastic piece (522) is arranged on the handle frame (510) and used for driving the radial movable block (521) to return to the locking position, when the radial movable block (521) is at the locking position, the locking part (5211) is abutted and matched with the limiting part (523) to limit the radial movable block (521) and the handle frame (510) to rotate towards the folding direction, when radial movable block (521) is in when the position of unblocking, locking portion (5211) can be in rotatory in the groove of stepping down (524) of rotation, so that handle frame (510) can rotate relatively first support frame (100) and fold up, release mechanism (540) configuration is configured to can drive radial movable block (521) follow the locking position gets into the position of unblocking.

7. The folding leg for controlling the opening of the support frame with the seating assembly of claim 6, the handle frame (510) comprises a base rod body (511) and an expansion rod (512), the base rod body (511) is coaxially and rotatably arranged with the first support frame (100) and the second support frame (200), the radial movable block (521) and the first elastic piece (522) are arranged on the base rod body (511), the telescopic rod (512) is movably arranged on the base rod body (511) and can extend and retract relative to the base rod body (511), the unlocking mechanism (540) comprises a pushing block (541), the pushing block (541) is arranged on the telescopic rod (512), when the telescopic rod (512) retracts relative to the base rod body (511), the pushing block (541) can push the radial movable block (521) to move to the unlocking position.

8. The folding leg using the seat assembly to control the opening of the supporting frame as claimed in claim 5, wherein the rotation limiting structure (530) comprises a first rotation limiting block (531) and a second rotation limiting block (532) respectively disposed on the handle frame (510) and the second supporting frame (200), the first rotation limiting block and the second rotation limiting block (532) are circumferentially arranged, and when the handle frame (510) and the second supporting frame (200) are opened relative to the first supporting frame (100), the second rotation limiting block (532) abuts against the first rotation limiting block (531) to limit the second supporting frame (200) to rotate towards the folding direction.

9. A folding leg opening with a seat assembly control support according to claim 1, characterized in that the seat assembly (300) comprises a base (310) and a seat body (320), the base (310) is rotatably arranged on the first support (100), the seat assembly (300) is matched with a first locking and unlocking device (400) through the base (310), and the seat body (320) is rotatably arranged on the base (310) and can rotate along a vertical axis; the seat comprises a base (310) and a seat body (320), wherein a rotary positioning mechanism (330) is arranged on the base (310) and the seat body (320), the rotary positioning mechanism (330) comprises a positioning part (331), a second elastic part (332) and at least two gear parts (333), the positioning part (331) is movably arranged on the base (310) and can move along the radial direction of the rotation axis of the seat body (320), the gear parts (333) are arranged on the seat body (320) and are distributed along the circumferential direction of the rotation axis, the second elastic part (332) is arranged on the base (310) and is used for driving the positioning part (331) to reset towards the direction of the rotation axis of the seat body (320), when the positioning part (331) is opposite to the gear parts (333), the positioning part (331) can enter a position matched with the gear parts (333) through the second elastic part (332) and limit the seat body (320) to rotate relative to the base (310), when the positioning piece (331) moves towards the direction far away from the rotation axis of the seat main body (320), the positioning piece (331) can be disengaged from the gear part (333); the seat body (320) is foldable.

10. A stroller, comprising: the folding stand of any of claims 1 to 9, wherein wheels are provided on both the first support (100) and the second support (200).

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