Folding frame with simple locking structure and baby carriage

Abstract

The utility model discloses a folding frame of simple lock structure, it includes middle frame body, side frame body, lock piece and lock piece drive mechanism. Middle frame body is equipped with middle joint seat, and side frame body is equipped with two, and side frame body is equipped with side joint seat, and the side joint seat of two side frame bodies is coaxial with middle joint seat and pivots, and two side joint seats are arranged respectively in the two sides of middle joint seat along joint axis, and side joint seat is provided with the joint cooperation part and the space for giving room. Lock piece is restricted to be set up in the direction of vertical joint axis along middle joint seat and is provided with two card convex structure respectively corresponding the joint cooperation part of two side joint seats, and two card convex structure respectively extends to two side joint seats, and lock piece is provided with the lock position and the unlocking position, and lock piece drive mechanism is connected with lock piece and is used to drive lock piece action to switch the lock position and the unlocking position. The utility model discloses still has the folding frame of above-mentioned child bicycle. The folding frame above, lock structure is simple, and easy production implementation.

Description

Technical Field

[0001] This utility model relates to folding frame structures, and in particular to a folding frame and stroller with a simple locking structure. Background Technology

[0002] Existing strollers typically feature a front wheel frame, a rear wheel frame, and a handlebar frame. These three frames are coaxially hinged together to form a folding frame structure, allowing them to rotate relative to each other to open and fold. To ensure the stability of the folding frame when open, locking mechanisms are needed to restrict the relative rotation of the three frames. These locking mechanisms must be unlockable to allow the frames to rotate and fold. Current technologies employ complex locking structures for these three frames, making manufacturing difficult. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a folding frame with a simple locking structure.

[0004] This utility model also proposes a stroller with the above-mentioned folding frame.

[0005] A simple folding frame with a locking structure according to a first aspect embodiment of the present invention includes: a central frame body with a central joint seat; two side frames, each with a side joint seat, the side joint seats of the two side frames being coaxially pivotally connected to the central joint seat, the pivot axis between the side joint seats and the central joint seat being defined as the joint axis, the two side joint seats being respectively disposed on both sides of the central joint seat along the joint axis, the side joint seats being provided with a locking engagement portion and a clearance space; and a locking member, restricted to being movably disposed on the central joint seat in a direction perpendicular to the joint axis, the locking member being provided with locking engagement portions corresponding to the two side joint seats respectively. The mating part has two locking protrusions, each extending toward one of the two side joint seats. The locking component has a locking position and an unlocking position: in the locking position, the locking protrusion engages with the corresponding locking mating part and restricts the rotation of the side joint seat relative to the middle joint seat; in the unlocking position, the locking protrusion is positioned to enter the clearance space, which allows the locking protrusion to move relative to the side joint seat and the middle joint seat; a locking component drive mechanism is located on the middle frame, connected to the locking component and used to drive the locking component to switch the locking position and the unlocking position.

[0006] According to an embodiment of the present invention, a simple locking structure for a folding frame has at least the following advantages: the folding frame uses a single locking component, which has locking protrusions extending to the two side joint seats to engage with the locking mating parts or clearance spaces to achieve the corresponding locking and unlocking functions. The structure has fewer parts, is simpler, and is easier to manufacture and implement.

[0007] According to some embodiments of this utility model, the locking structure includes a first protrusion and a second protrusion, which are respectively disposed at both ends of the locking member along its movement direction. The locking engagement part includes a first abutting block and a second abutting block. When the locking member is in the locking position, the first abutting block and the second abutting block abut against the first protrusion and the second protrusion respectively in a one-to-one correspondence. The abutting engagement of the first abutting block and the first protrusion is used to restrict the side joint seat from rotating relative to the middle joint seat in a first rotation direction. The abutting engagement of the second abutting block and the second protrusion is used to restrict the side joint seat from rotating relative to the middle joint seat in a second rotation direction. One of the first rotation direction and the second rotation direction is clockwise, and the other is counterclockwise.

[0008] According to some embodiments of the present invention, the clearance space includes a first clearance groove and a second clearance groove. The first clearance groove and the second clearance groove are used to cooperate one-to-one with the first protrusion and the second protrusion. The first clearance groove and the second clearance groove extend circumferentially along the joint axis and are respectively located on both sides of the joint axis. One end of the first clearance groove is provided with a first inlet. The first inlet is radially adjacent to the first abutment block along the joint axis. One end of the second clearance groove is provided with a second inlet. The second inlet is radially adjacent to the second abutment block along the joint axis. When the locking member is in the unlocked position, the first protrusion moves to a position opposite to the first inlet, and the second protrusion moves to a position opposite to the second inlet.

[0009] According to some embodiments of the present invention, the side joint seat is provided with a cavity with an opening facing the middle joint seat. The bottom wall of the cavity opposite to its opening is provided with a central boss and a side boss. The central boss is located at the center of the cavity and is arranged around the joint axis. The central boss is provided with a pivoting part for pivotal engagement with the middle joint seat. The side boss is connected to the cavity sidewall of the cavity. The first abutting block is the radially extended portion of the central boss, and the second abutting block is one end of the side boss.

[0010] According to some embodiments of the present invention, the middle joint seat is provided with a first sliding groove adapted to the locking member. The first sliding groove extends in a direction perpendicular to the joint axis. The locking member is slidably disposed in the first sliding groove. The first sliding groove is provided with openings at both ends corresponding to the two side joint seats for the locking protrusion structure to extend out. A limiting plate is provided at the position of one end opening of the first sliding groove of the middle joint seat. A limiting end face is provided on the side joint seat of one of the side frames. The locking member is clamped and limited between the limiting plate and the limiting end face.

[0011] According to some embodiments of the present invention, the two opposite surfaces of the limiting plate are respectively provided with pivot portions corresponding to the two side joint seats. The side joint seats are pivotally connected to the corresponding pivot portions. The locking member is provided with a second sliding groove adapted to the pivot portion. The second sliding groove extends in a direction perpendicular to the joint axis. The pivot portion is slidably disposed in the second sliding groove.

[0012] According to some embodiments of the present invention, the locking mechanism includes a pulling structure and a reset elastic element. The reset elastic element is disposed between the locking element and the middle joint seat. The reset elastic element is used to make the locking element tend to enter the locking position. The pulling structure is connected to the locking element and is used to drive the locking element from the locking position to the unlocking position.

[0013] According to some embodiments of the present invention, the locking mechanism includes a pulling structure and a reset elastic element. The reset elastic element is disposed between the locking element and the middle joint seat. The reset elastic element is used to make the locking element tend to enter the locking position. The pulling structure is connected to the locking element and is used to drive the locking element from the locking position to the unlocking position. The reset elastic element is disposed between the pivot portion and the locking element, and both ends of the reset elastic element abut against the pivot portion and the locking element, respectively.

[0014] According to a second aspect of the present invention, a children's stroller includes a frame, the frame being provided with a folding frame with a simple locking structure as described in the first aspect of the present invention.

[0015] The stroller according to the embodiments of the present invention has at least the following beneficial effects: due to the use of the folding frame of the first aspect of the present invention, the locking structure of the stroller frame is simple and easy to manufacture and implement.

[0016] According to some embodiments of the present invention, the middle frame is a handrail frame, one of the side frames is a front wheel frame, and the other side frame is a rear wheel frame.

[0017] Additional aspects and advantages of this invention 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 invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a perspective view of the stroller according to an embodiment of the present utility model;

[0020] Figure 2 This is an explosion diagram of a children's stroller according to an embodiment of the present invention;

[0021] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0022] Figure 4 This is a partial schematic diagram of the side frame of an embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the joint seat, locking component, and locking component drive mechanism in an embodiment of this utility model;

[0024] Figure 6 This is a schematic diagram of the locking component in the locking position according to an embodiment of the present utility model;

[0025] Figure 7 This is a schematic diagram of the locking component in the unlocked position according to an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the folded frame of the stroller according to an embodiment of the present utility model.

[0027] Figure 9 for Figure 8 Side sectional view;

[0028] Figure 10 for Figure 9 A magnified view of a portion of the image.

[0029] Figure label:

[0030] The frame body 100, the joint seat 110, the first slide groove 111, the limiting plate 112, and the pivot part 113;

[0031] Side frame 200, side joint seat 210, snap-fit ​​part 211, clearance space 212, first abutting block 211a, second abutting block 211b, first clearance groove 212a, second clearance groove 212b, first inlet 213, second inlet 214, central boss 215, side boss 216, pivot part 2151, limiting end face 217;

[0032] Locking component 300, locking protrusion structure 310, first protrusion 310a, second protrusion 310b, second sliding groove 320;

[0033] The locking mechanism 400, the pulling structure 410, and the reset elastic element 420 are included. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0037] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0038] Reference Figures 1 to 10A simple locking structure for folding frames includes: a central frame 100, side frames 200, a locking element 300, and a locking element drive mechanism 400. The central frame 100 is provided with a central joint seat 110. Two side frames 200 are provided, each with a side joint seat 210. The side joint seats 210 of both side frames 200 are coaxially pivotally connected to the central joint seat 110. The pivot axis between the side joint seats 210 and the central joint seat 110 is defined as the joint axis. The side joint seats 210 are respectively located on both sides of the central joint seat 110 along the joint axis. The side joint seats 210 are provided with a locking engagement portion 211 and a clearance space 212. The locking member 300 is restricted to move along the direction perpendicular to the joint axis and is disposed in the middle joint seat 110. The locking member 300 is provided with two locking protrusions 310 corresponding to the locking engagement parts 211 of the two side joint seats 210, respectively. The two locking protrusions 310 extend toward the two side joint seats 210. The locking member 300 is provided with a locking position and an unlocking position: in the locking position, the locking protrusions 310 engage with the corresponding locking engagement parts 211 and restrict the rotation of the side joint seats 210 relative to the middle joint seat 110; in the unlocking position, the locking protrusions 310 are in a position that can enter the clearance space 212, which is used to allow the locking protrusions 310 to move so that the side joint seats 210 and the middle joint seat 110 can rotate relative to each other. The locking member drive mechanism 400 is disposed in the middle frame 100. The locking member drive mechanism 400 is connected to the locking member 300 and is used to drive the locking member 300 to switch the locking position and the unlocking position.

[0039] When the central frame 100 and the two side frames 200 are opened, the locking element 300 is kept in the locked position. The locking element 300 is engaged with the two protruding structures 310 and the engaging parts 211 of the two side joint seats 210, thereby limiting the relative angular position of the side joint seats 210 relative to the central joint seat 110 and achieving locking. When it is necessary to rotate and fold the central frame 100 and the two side frames 200, the locking element drive mechanism 400 switches the locking element 300 to the unlocked position. The protruding structures 310 of the locking element 300 enter the position that can engage with the clearance space 212, thereby allowing the side frames 200 to rotate relative to the central frame 100, and thus achieving folding.

[0040] The aforementioned folding frame uses a single locking component 300. The locking component 300 is provided with locking protrusions 310 extending to the two side joint seats 210 respectively to cooperate with the locking engagement part 211 or the clearance space 212 to realize the corresponding locking and unlocking functions. The above structure has fewer parts, is simpler, and is easier to manufacture and implement.

[0041] In an embodiment, the locking structure 310 includes a first protrusion 310a and a second protrusion 310b, which are respectively disposed at both ends of the locking member 300 along its movement direction. The locking engagement part 211 includes a first abutting block 211a and abutting block 211b. When the locking member 300 is in the locking position, the first abutting block 211a and the second abutting block 211b abut against the first protrusion 310a and the second protrusion 310b respectively. The abutting engagement of the first abutting block 211a and the first protrusion 310a is used to restrict the side joint seat 210 from rotating relative to the middle joint seat 110 in a first rotation direction. The abutting engagement of the second abutting block 211b and the second protrusion 310b is used to restrict the side joint seat 210 from rotating relative to the middle joint seat 110 in a second rotation direction. One of the first rotation direction and the second rotation direction is clockwise, and the other is counterclockwise. With the above structure, when the locking member 300 restricts the rotation of the side joint seat 210 relative to the middle joint seat 110, it sets two protrusions and restricts the rotation at both ends. Each protrusion restricts one direction of rotation, thereby avoiding the use of a single structure to bear the force in two directions at the same time. The structure is more balanced and has better strength.

[0042] In this embodiment, the clearance space 212 includes a first clearance groove 212a and a second clearance groove 212b. The first clearance groove 212a and the second clearance groove 212b are used to cooperate one-to-one with the first protrusion 310a and the second protrusion 310b. The first clearance groove 212a and the second clearance groove 212b extend circumferentially along the joint axis and are located on both sides of the joint axis. One end of the first clearance groove 212a is provided with a first inlet 213. The first inlet 213 and the first abutment block 211a are arranged radially adjacent to each other along the joint axis. One end of the second clearance groove 212b is provided with a second inlet 214. The second inlet 214 and the second abutment block 211b are arranged radially adjacent to each other along the joint axis. When the locking member 300 is in the unlocked position, the first protrusion 310a moves to a position opposite to the first inlet 213 and the second protrusion 310b moves to a position opposite to the second inlet 214. By providing clearance grooves that extend circumferentially along the joint axis to accommodate the protrusions, the protrusions can enter through the inlet and move in an arc within it, thus allowing the folding frame to fold stably.

[0043] In this embodiment, the side joint seat 210 has a cavity with an opening facing the middle joint seat 110. The bottom wall of the cavity opposite to its opening has a central boss 215 and a side boss 216. The central boss 215 is located at the center of the cavity and is arranged around the joint axis. The central boss 215 has a pivot portion 2151 for pivotal engagement with the middle joint seat 110. The side boss 216 is connected to the side wall of the cavity. The first abutment block 211a is a radially extending portion of the central boss 215, and the second abutment block 211b is one end of the side boss 216. With this structure, the first abutment block 211a and the second abutment block 211b are respectively positioned in the two positions described above. When the locking member 300 is in the locked position, the structural strength is better, and the locking is more stable.

[0044] In this embodiment, the middle joint seat 110 is provided with a first slide groove 111 adapted to the locking member 300. The first slide groove 111 extends along the direction perpendicular to the joint axis. The locking member 300 is slidably disposed in the first slide groove 111. The first slide groove 111 is provided with openings at both ends of the corresponding two side joint seats 210 for the protruding structure 310 to extend. The middle joint seat 110 is provided with a limiting plate 112 at one end of the opening of the first slide groove 111. The side joint seat 210 of one side frame 200 is provided with a limiting end face 217. The locking member 300 is clamped and limited between the limiting plate 112 and the limiting end face 217. With the above structure, the locking component 300 can be movably connected through the first sliding groove 111. By setting the limiting plate 112, the locking component 300 can be limited by the side joint seat 210 of one of the side frames 200 and the limiting plate 112 together. Thus, the installation of the locking component 300 is relatively simple and the installation position is stable.

[0045] In this embodiment, the two opposite surfaces of the limiting plate 112 are respectively provided with pivot portions 113 corresponding to the two side joint seats 210. The side joint seats 210 are pivotally connected to the corresponding pivot portions 113. The locking member 300 is provided with a second sliding groove 320 adapted to the pivot portion 113. The second sliding groove 320 extends along the direction perpendicular to the joint axis, and the pivot portion 113 is slidably disposed in the second sliding groove 320. With the above structure, the second sliding groove 320 can form a sliding fit with the pivot portion 113, thereby making the movable connection of the locking member 300 more stable. In this embodiment, the pivot portion 2151 provided on the central boss 215 of the side joint seat 210 is a pivot hole adapted to the pivot portion 113.

[0046] It is conceivable that in other embodiments, the movable connection of the locking member 300 is not limited to the above-described method. For example, the movable connection can be achieved by providing a sliding groove in the locking member 300 and a corresponding slider in the middle joint seat 110. In the art, there are many ways to realize the movement of a component relative to another component in a predetermined direction, and those skilled in the art can configure it according to the actual situation.

[0047] In this embodiment, the rotational connection between the central joint seat 110 and the side joint seat 210 is mainly achieved through the rotational engagement of the pivot portion 2151 (pivot hole) provided in the pivot portion 113 and the central boss 215. In other embodiments, the rotational connection between the central joint seat 110 and the side joint seat 210 can also be achieved through other structures, such as a pivot structure in the side joint seat 210 and a pivot hole in the central joint seat 110. It is understood that there are many implementation methods for achieving rotational connections between components in the art, and those skilled in the art can configure them according to actual conditions.

[0048] In this embodiment, the locking mechanism 400 includes a pulling structure 410 and a reset elastic element 420. The reset elastic element 420 is disposed between the locking member 300 and the middle joint seat 110. The reset elastic element 420 is used to make the locking member 300 tend to enter the locking position. The pulling structure 410 is connected to the locking member 300 and is used to drive the locking member 300 from the locking position to the unlocking position. The locking mechanism 400 adopts the above-described structure, which is simple and easy to implement.

[0049] In this embodiment, the pulling structure 410 may include an operating element and a pull rope. The operating element is movably mounted on the central frame 100 and may be a button, knob, or lever, etc. The operating element is connected to the pull rope, which is connected to the locking element 300. When the operating element is activated, it pulls the locking element 300 via the pull rope, thereby driving it into the unlocked position. When the pull rope is released via the operating element, the locking element 300 can be reset to the locked position via the reset elastic element 420. It is conceivable that in other embodiments, the locking element driving mechanism 400 is not limited to the above-described implementation method. For example, the operating element may be linked to the locking element 300 via other transmission structures instead of a pull rope. These transmission structures may be linkage structures, lever structures, gear structures, etc., or the operating element may be directly integrated with the locking element 300, thereby directly driving the locking element 300 to move.

[0050] In this embodiment, the reset elastic element 420 is disposed between the pivot portion 113 and the locking element 300, with both ends of the reset elastic element 420 abutting against the pivot portion 113 and the locking element 300, respectively. Using the above structure, the reset elastic element 420 can be disposed via the pivot portion 113, thereby simplifying the structure. In this embodiment, the reset elastic element 420 is a spring, or in some embodiments, it may also be a sheet spring or a rubber body, etc.

[0051] A children's stroller according to a second aspect of this utility model includes a frame, the frame of which is provided with the aforementioned folding frame. Due to the use of the folding frame of the first aspect of this utility model, the locking structure of the stroller frame is simple and easy to manufacture.

[0052] In this embodiment, the middle frame 100 is a handrail frame, one side frame 200 is a front wheel frame, and the other side frame 200 is a rear wheel frame.

[0053] In this embodiment, the central frame 100 is provided with two central joint seats 110, and the side frame 200 is also provided with two side joint seats 210. The locking member 300 and the locking member drive mechanism 400 are also provided with two sets, thus forming a structure with two joints.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A folding frame with a simple locking structure, characterized in that, include: The middle frame (100) is provided with a middle joint seat (110); There are two side frames (200), each side frame (200) is provided with a side joint seat (210). The side joint seats (210) of the two side frames (200) are coaxially pivotally connected to the middle joint seat (110). The pivot axis between the side joint seat (210) and the middle joint seat (110) is defined as the joint axis. The two side joint seats (210) are respectively provided on both sides of the middle joint seat (110) along the joint axis. The side joint seat (210) is provided with a snap-fit ​​part (211) and a clearance space (212). A locking member (300) is restricted to be movably disposed in the middle joint seat (110) in a direction perpendicular to the joint axis. The locking member (300) is provided with two locking protrusions (310) corresponding to the locking engagement parts (211) of the two side joint seats (210). The two locking protrusions (310) extend toward the two side joint seats (210) respectively. The locking member (300) is provided with a locking position and an unlocking position: in the locking position, the locking protrusions (310) engage with the corresponding locking engagement parts (211) and restrict the side joint seats (210) from rotating relative to the middle joint seat (110); in the unlocking position, the locking protrusions (310) are in a position that can enter the clearance space (212). The clearance space (212) is used to allow the locking protrusions (310) to move so that the side joint seats (210) and the middle joint seat (110) can rotate relative to each other. A locking mechanism (400) is provided on the middle frame (100). The locking mechanism (400) is connected to the locking component (300) and is used to drive the locking component (300) to switch the locking position and the unlocking position.

2. The folding frame with a simple locking structure according to claim 1, characterized in that: The latching structure (310) includes a first protrusion (310a) and a second protrusion (310b), which are respectively disposed at both ends of the latching member (300) along its movement direction. The latching engagement part (211) includes a first abutting block (211a) and a second abutting block (211b). When the latching member (300) is in the latching position, the first abutting block (211a) and the second abutting block (211b) respectively engage with the first protrusion (310a). The first abutting block (211a) and the first protrusion (310a) are in a one-to-one abutting engagement with each other. The abutting engagement of the first abutting block (211a) and the first protrusion (310a) is used to restrict the rotation of the side joint seat (210) relative to the middle joint seat (110) in a first rotation direction. The abutting engagement of the second abutting block (211b) and the second protrusion (310b) is used to restrict the rotation of the side joint seat (210) relative to the middle joint seat (110) in a second rotation direction. One of the first rotation direction and the second rotation direction is clockwise and the other is counterclockwise.

3. The simple folding frame with locking structure according to claim 2, characterized in that: The clearance space (212) includes a first clearance groove (212a) and a second clearance groove (212b). The first clearance groove (212a) and the second clearance groove (212b) are used to cooperate one-to-one with the first protrusion (310a) and the second protrusion (310b). The first clearance groove (212a) and the second clearance groove (212b) extend circumferentially along the joint axis and are respectively located on both sides of the joint axis. One end of the first clearance groove (212a) is provided with a first inlet (213). 213) The second abutment (211a) is arranged radially adjacent to the first abutment (211a) along the joint axis. One end of the second clearance groove (212b) is provided with a second inlet (214). The second inlet (214) and the second abutment (211b) are arranged radially adjacent to each other along the joint axis. When the locking member (300) is in the unlocked position, the first protrusion (310a) moves to a position opposite to the first inlet (213), and the second protrusion (310b) moves to a position opposite to the second inlet (214).

4. The folding frame with a simple locking structure according to claim 2, characterized in that: The side joint seat (210) is provided with a cavity with an opening facing the middle joint seat (110). The bottom wall of the cavity opposite to its opening is provided with a central boss (215) and a side boss (216). The central boss (215) is located at the center of the cavity and is arranged around the joint axis. The central boss (215) is provided with a pivot part (2151) for pivotal engagement with the middle joint seat (110). The side boss (216) is connected to the cavity side wall of the cavity. The first abutment block (211a) is the radially extended portion of the central boss (215), and the second abutment block (211b) is one end of the side boss (216).

5. The simple folding frame with locking structure according to claim 1, characterized in that: The middle joint seat (110) is provided with a first slide groove (111) adapted to the locking member (300). The first slide groove (111) extends in a direction perpendicular to the joint axis. The locking member (300) is slidably disposed in the first slide groove (111). The first slide groove (111) is provided with openings at both ends of the two side joint seats (210) for the protruding structure (310) to extend out. The middle joint seat (110) is provided with a limiting plate (112) at one end opening of the first slide groove (111). The side joint seat (210) of one of the side frames (200) is provided with a limiting end face (217). The locking member (300) is clamped and limited between the limiting plate (112) and the limiting end face (217).

6. The simple folding frame with locking structure according to claim 5, characterized in that: The limiting plate (112) has two opposite plate surfaces respectively provided with pivot portions (113) corresponding to the two side joint seats (210). The side joint seats (210) are pivotally connected to the corresponding pivot portions (113). The locking member (300) is provided with a second slide groove (320) adapted to the pivot portion (113). The second slide groove (320) extends in a direction perpendicular to the joint axis. The pivot portion (113) is slidably disposed in the second slide groove (320).

7. The folding frame with a simple locking structure according to claim 1, characterized in that: The locking mechanism (400) includes a pulling structure (410) and a reset elastic element (420). The reset elastic element (420) is disposed between the locking member (300) and the middle joint seat (110). The reset elastic element (420) is used to make the locking member (300) tend to enter the locking position. The pulling structure (410) is connected to the locking member (300) and is used to drive the locking member (300) from the locking position to the unlocking position.

8. The simple folding frame with a locking structure according to claim 6, characterized in that: The locking mechanism (400) includes a pulling structure (410) and a reset elastic element (420). The reset elastic element (420) is disposed between the locking element (300) and the middle joint seat (110). The reset elastic element (420) is used to make the locking element (300) tend to enter the locking position. The pulling structure (410) is connected to the locking element (300) and is used to drive the locking element (300) from the locking position to the unlocking position. The reset elastic element (420) is disposed between the pivot portion (113) and the locking element (300). The two ends of the reset elastic element (420) respectively abut against the pivot portion (113) and the locking element (300).

9. A children's stroller, characterized in that, Includes a frame, the frame being provided with a folding frame with a simple locking structure as described in any one of claims 1 to 8.

10. The stroller according to claim 9, characterized in that: The central frame (100) is a handrail frame, one of the side frames (200) is a front wheel frame, and the other side frame (200) is a rear wheel frame.

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