CN210822420U

CN210822420U - Children's barrow without rotary gap

Info

Publication number: CN210822420U
Application number: CN201921399561.8U
Authority: CN
Inventors: 范建华; 马聪泉; 赵国松
Original assignee: Zhejiang Chenhui Yingbao Children Products Co ltd
Current assignee: Zhejiang Chenhui Yingbao Children Products Co ltd
Priority date: 2019-04-04
Filing date: 2019-08-27
Publication date: 2020-06-23
Anticipated expiration: 2029-08-27
Also published as: CN211076031U

Abstract

The application discloses children's handcart of no rotation gap, including the frame that can fold up and expand and install sunshade on the frame, the sunshade includes first mount pad and the second mount pad of connecting through first pivot, one in first mount pad and the second mount pad with connected to the frame, another with the skeleton of sunshade is connected, be equipped with the orientation on the first mount pad the ratchet of second mount pad, be equipped with on the second mount pad only can first pivot direction move with ratchet matched with ratchet and support and push away this ratchet and be close to the pressure spring of ratchet.

Description

Children's barrow without rotary gap

Technical Field

The utility model relates to a bassinet field especially relates to children's handcart of no rotation gap.

Background

The existing child stroller can be folded, and generally comprises two symmetrically arranged side supports, each side support is provided with a four-bar mechanism formed by sequentially and rotatably connecting bars, a locking mechanism is arranged at one rotating joint, the locking mechanism is in a locking state when the stroller frame is in an open state, and when the locking mechanism is unlocked, the stroller frame can be folded. In order to avoid the trolley from being opened naturally after being folded, a trolley retracting hook is generally arranged on the trolley and can be matched with a pin on the trolley frame, so that the trolley frame is prevented from being opened naturally.

The CN108502004A discloses a foldable baby carriage frame, which comprises a frame body, wherein the frame body comprises a front leg rod, a push-pull rod, a rear leg rod and a main joint, the front leg rod, the push-pull rod and the rear leg rod are all arranged symmetrically about the central line of the frame body, the upper end of the front leg rod is hinged with the lower end of the push-pull rod and the upper end of the rear leg rod at the same side through the main joint, the front leg rod, the push-pull rod and the rear leg rod are all tubes, a car collecting hook is arranged on the push-pull rod at one side of the frame body and close to the main joint, and a joint matched with the car collecting hook is arranged on the front leg rod at the same side of the car collecting hook and close to the main joint.

The inventor has found that, in the process of opening and folding the sunshade in the related art, a small gap is formed between the rotary seat connected with the sunshade and the frame in order to release the movement of the components, and the gap is close to the seating area of the child, when the child sits on the seat, the fingers of the child may be clamped, and therefore, the elimination of the gap of the movement of the frame components is an important design requirement.

SUMMERY OF THE UTILITY MODEL

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Preferably, the second mounting seat is provided with an accommodating cavity which is opened towards the ratchet, the ratchet slides in the accommodating cavity to realize locking and releasing with the ratchet, and the pressure spring is pressed between the ratchet and the second mounting seat to keep locking of the ratchet and the ratchet.

Preferably, the ratchet wheel is arranged around the first pivot, a radially protruding guide block is arranged on the circumferential surface of the ratchet wheel, and a guide groove for guiding the guide block to move along the first pivot is arranged on the inner wall of the accommodating cavity.

Preferably, the guide blocks are uniformly arranged on the circumferential surface of the ratchet wheel, and each guide block abuts against the groove wall of the guide groove in the direction in which the ratchet wheel rotates around the first pivot.

Preferably, a positioning part for accommodating at least a part of the pressure spring is arranged on the side surface of the ratchet wheel facing the accommodating cavity.

Preferably, the compression spring is wound on the first pivot, and the positioning portion is provided with a retaining ring for preventing the compression spring from interfering with the first pivot.

Preferably, the sunshade further comprises a fixed rod connected with the frame and shed cloth connected between the fixed rod and the framework, and the framework rotates along with the first mounting seat or the second mounting seat to be far away from or close to the fixed rod.

Preferably, the frame includes folding push-up hand pole and push-down hand pole, first mount pad is installed on the revolute joint between push-up hand pole and the push-down hand pole, the second mount pad with the skeleton is connected.

Preferably, the skeleton is the U-shaped, first mount pad is equipped with two and sets up respectively the U-shaped opening both ends of skeleton, the second mount pad with the frame connection.

This application has released the amount of exercise of sunshade in the motion process through the removal of ratchet on first pivot direction, consequently can not appear rotating the gap between the rotation seat of sunshade and the frame, consequently when children take, safe and reliable, simple structure is stable simultaneously, the facilitate promotion.

Specific advantageous technical effects will be explained in conjunction with specific structures in the detailed description.

Drawings

FIG. 1 is a schematic view of a child stroller in one embodiment;

FIG. 2 is a schematic view of the swivel joint of the child stroller of FIG. 1;

FIG. 3 is an exploded view of the revolute joint of FIG. 2;

FIG. 4 is an enlarged view of the point A in FIG. 3;

FIG. 5 is an enlarged view of the point B in FIG. 3;

FIG. 6 is a schematic view of another embodiment of a child stroller;

FIG. 7 is a side elevational view of the child stroller shown in FIG. 6;

fig. 8 is an exploded view of the swivel joint of the child stroller of fig. 6.

The reference numerals in the figures are illustrated as follows:

1. a side bracket; 11. a handle bar; 12. a rear connecting rod; 13. a front link; 14. a front foot bar; 15. a rear foot bar; 16. a lower connecting rod; 17. a framework; 18. fixing the rod; 2. a revolute joint; 20. a first pivot; 21. a first mounting seat; 22. a second mounting seat; 221. an accommodating cavity; 222. a guide groove; 23. a ratchet; 24. a ratchet wheel; 241. a guide block; 242. a positioning part; 243. a retainer ring; 25. and (5) pressing a spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 8, the present application discloses a children handcart without a rotation gap, which comprises a foldable and unfoldable frame and a sunshade mounted on the frame, wherein the sunshade comprises a first mounting seat 21 and a second mounting seat 22 which are rotatably connected through a first pivot 20, one of the first mounting seat 21 and the second mounting seat 22 is connected with the frame, the other one is connected with a framework 17 of the sunshade, a ratchet 23 facing the second mounting seat 22 is arranged on the first mounting seat 21, a ratchet 24 matched with the ratchet 23 and capable of moving only in the direction of the first pivot 20 and a pressure spring 25 for pushing the ratchet 24 to be close to the ratchet 23 are arranged on the second mounting seat 22.

The ratchet 24 achieves locking and unlocking with the ratchet 23 by moving in the direction of the first pivot 20. Because the ratchet wheel 24 is only movable in the direction of the first pivot 20, when the ratchet wheel 24 and the ratchet 23 are locked, the second mounting seat 22 on which the ratchet wheel 24 is mounted is also locked with the ratchet 23, i.e. the second mounting seat 22 cannot rotate relative to the ratchet 23 on the axis of the first pivot 20, thereby achieving locking of the first mounting seat 21 and the second mounting seat 22, further defining the relative state of the sunshade and the vehicle frame. The advantage of this design is that the locking and unlocking of the first mount 21 and the second mount 22 is achieved by movement of the ratchet 24 in the direction of the first pivot 20, while the ratchet 24 is housed in the second mount 22, isolated from the environment. Therefore, children or other users cannot contact the movable part, the rotating gap is avoided, and the safety is improved.

The compression spring 25 is used for pushing the ratchet wheel 24 to be close to the ratchet teeth 23, namely locking of the ratchet wheel 24 and the ratchet teeth 23 is achieved, and unlocking of the ratchet teeth 23 and the ratchet wheels 24 is driven in various modes, for example, the ratchet wheel 24 is driven to run against the elastic force of the compression spring 25 through a traction cable, so that unlocking is completed far away from the ratchet teeth 23; then, for example, the ratchet wheel 24 is driven by the push rod to complete the unlocking; for example, in the scheme provided in this embodiment, the tooth surface of the ratchet 24 and the ratchet 23 for locking is also a guiding inclined surface in the unlocking process, and when the sunshade is driven by external force to move relative to the frame, the ratchet 24 will overcome the action of the compression spring 25 to be far away from the ratchet 23 under the action of the ratchet 23, so as to realize unlocking.

The advantage of this design lies in the required moment of convenient operation and the convenient adjustment unblock. In the aspect of convenient operation, a user does not need to independently operate the unlocking mechanism, and the position of the sunshade can be adjusted by directly operating the sunshade; in the aspect of conveniently adjusting the moment required by unlocking, the unlocking moment, namely the elastic force of the pressure spring 25, can be obtained by utilizing the slope processing of the tooth surface locked by the ratchet wheel 24 and the ratchet 23, and the unlocking moment of the sunshade can be increased by increasing the elastic force of the pressure spring 25, otherwise, the same is true.

In a specific arrangement of the ratchet wheel 24, in an embodiment, the second mounting seat 22 is provided with a receiving cavity 221 which is opened towards the ratchet teeth 23, the ratchet wheel 24 slides in the receiving cavity 221 to realize locking and releasing with the ratchet teeth 23, and the pressure spring 25 is pressed between the ratchet wheel 24 and the second mounting seat 22 to keep the ratchet wheel 24 and the ratchet teeth 23 locked.

The receiving cavity 221 provides a limit and a guide for the ratchet 24, so as to improve the stability of the ratchet 24 in the axial direction of the first pivot 20, and more importantly, the rotation stroke of the second mounting seat 22 relative to the rotation axis of the first pivot 20 is transmitted to the ratchet 24 through the receiving cavity 221, so that the ratchet 24 and the receiving cavity 221 need to be rotated in the rotation direction of the first pivot 20.

In the product design, the rotation limiting structure has various arrangements, for example, the ratchet wheel 24 is a cam eccentrically arranged relative to the first pivot 20, and the receiving cavity 221 is complementary to the shape of the ratchet wheel 24. In order to facilitate the machining and the precision control, in an embodiment, the ratchet wheel 24 is disposed around the first pivot 20, a guide block 241 protruding in a radial direction is disposed on a circumferential surface of the ratchet wheel 24, and a guide groove 222 for guiding the guide block 241 to move along the first pivot 20 is disposed on an inner wall of the receiving cavity 221.

The smoothness of the movement of the ratchet 24 in the axial direction of the first pivot 20 determines the smoothness of the unlocking and locking of the ratchet 24 and the ratchet 23, which directly affects the feel of the sunscreen. The guide block 241 of the ratchet wheel 24 is guided by the guide groove 222 to move in the axial direction of the first pivot 20. Compared with other technical solutions, the machining of the guide block 241 and the guide groove 222 is easier to control the precision, so that the looseness between the guide block 241 and the guide groove 222 caused by the fit tolerance between the two is avoided. The sunshade is prevented from being loosened to reduce the use feeling of customers.

In terms of the selection of the number, in an embodiment, the plurality of guiding blocks 241 are uniformly arranged on the circumferential surface of the ratchet wheel 24, and each guiding block 241 is abutted against the groove wall of the guiding groove 222 in the direction of the rotation of the ratchet wheel 24 around the first pivot 20.

The limit of the ratchet wheel 24 and the second mounting seat 22 in the rotation direction of the first pivot 20 is realized by the guide block 241 and the guide groove 222 being matched with each other, so the strength of the guide block 241 and the guide groove 222 directly affects the magnitude of the torque that can be transmitted by the ratchet wheel 24 and the second mounting seat 22, and in the embodiment, the torque that can be transmitted is increased by increasing the number of the guide block 241 and the guide groove 222. Specifically, according to the scheme shown in the drawings, 4 guide blocks 241 are arranged on the ratchet wheel 24, four corresponding guide grooves 222 are also arranged, and the guide blocks 241 and the guide grooves 222 are radially distributed in the radial direction of the first pivot 20 in a one-to-one correspondence manner.

Regarding the mutual matching relationship between the ratchet 24 and the compression spring 25, in an embodiment, a positioning portion 242 for receiving at least a portion of the compression spring 25 is disposed on a side surface of the ratchet 24 facing the receiving cavity 221.

One end of the pressure spring 25 abuts against the second installation seat 22, and the other end of the pressure spring abuts against the ratchet wheel 24, when the ratchet wheel 24 overcomes the pressure of the pressure spring 25 and closes towards the second installation seat 22, the space where the pressure spring 25 is located can be compressed, and in order to provide a more compact appearance, the positioning part 242 on the ratchet wheel 24 can accommodate a part of the pressure spring 25, so that the situation that the compressed volume of the pressure spring 25 cannot be released, and the first installation seat 21 and the second installation seat 22 have a rotation gap in appearance is avoided. In actual assembly, the ratchet wheel 24 is wound around the first pivot 20 through the avoiding hole in the middle, the pressure spring 25 is also wound around the first pivot 20, the positioning portion 242 is actually a portion where the pressure spring 25 presses against the ratchet wheel 24, and when the positioning portion 242 is arranged in the avoiding hole, the avoiding hole can play a role in accommodating a part of the pressure spring 25.

In the specific fitting relationship between the positioning portion 242 and the pressing spring 25, in an embodiment, the pressing spring 25 is wound around the first pivot shaft 20, and the positioning portion 242 is provided with a retaining ring 243 for preventing the pressing spring 25 from interfering with the first pivot shaft 20.

When the ratchet wheel 24 is close to the second mounting seat 22 against the elastic force of the compression spring 25, not only the axial movement of the first pivot shaft 20 but also the rotation of the first pivot shaft 20 in the rotating direction may cause the compression spring 25 to fail to be positioned under the combined movement, and interfere with the first pivot shaft 20, so that the first mounting seat 21 and the second mounting seat 22 are blocked from rotating with each other, which affects the user experience. The retainer 243 is designed to effectively limit the displacement of the compression spring 25 in the radial direction of the first pivot 20, thereby overcoming the above-mentioned problem.

In the specific configuration of the sunshade, in one embodiment, the sunshade further includes a fixing rod 18 connected to the frame and a canopy cloth (not shown) connected between the fixing rod 18 and the frame 17, and the frame 17 rotates with the first mounting seat 21 or the second mounting seat 22 to move away from or close to the fixing rod 18.

When the user opens and folds up the sunshade, except that movable skeleton 17 still need a fixed point to pull the tarpaulin, just can realize expandeing or folding up, through setting up dead lever 18 on the frame in this embodiment, it is convenient to have to expand, and the sunshade also can paste folding up of dress and among the frame after the frame is folded up, is difficult for stained when convenient transport is deposited.

In an actual product, the first and second mounting

seats

21 and 22 have different mounting manners.

Referring to fig. 1 to 5, in one embodiment, the vehicle frame includes foldable upper and lower push rods, a first mounting seat 21 is mounted on the rotary joint 2 between the upper and lower push rods, and a second mounting seat 22 is connected with the framework 17.

Referring to fig. 6 to 8, in an embodiment, the frame 17 is U-shaped, two first mounting seats 21 are provided and respectively disposed at two ends of the U-shaped opening of the frame 17, and the second mounting seat 22 is connected to the frame.

With reference to the attached drawings, the child stroller structurally comprises two symmetrically-arranged side supports 1, each side support 1 comprises a handle rod 11, a front connecting rod 13, a rear connecting rod 12, a front foot rod 14, a rear foot rod 15 and a lower connecting rod 16, the tops of the front connecting rod 13 and the rear connecting rod 12 are rotatably connected with the bottom of the handle rod, the bottom of the front connecting rod 13, the top of the front foot rod 14 and the top of the rear foot rod 15 are coaxially and rotatably connected, one end of the lower connecting rod 16 is rotatably connected with the front foot rod 14, and the other end of the lower connecting rod is rotatably connected with the bottom of the rear connecting rod 12. Wherein, the joint of the front connecting rod 13 and the handle rod 11 is provided with a rotary joint 2.

The inner side of the rotary joint 2 is provided with a second mounting seat 22 which is rotatably connected with the first mounting seat 21, the inner side surface of the first mounting seat 21 is provided with a ratchet 23, the second mounting seat 22 is hollow, and a ratchet 24 matched with the ratchet 23 and a pressure spring 25 abutted against the ratchet 24 are arranged in the second mounting seat. The circumferential surface of the ratchet wheel 24 is provided with a guide block 241, and the cavity of the first mounting seat 21 is provided with a guide groove arranged along the axial direction, so that the ratchet wheel 24 is limited to move only along the axial direction.

Because the pressure spring 25 is arranged in the second installation seat 22, when the first installation seat 21 is rotated, the pressure spring 25 can extend or be compressed, the ratchet wheel 24 axially moves in the inner part, and the first installation seat 21 is always tightly attached to the second installation seat 22, so that potential safety hazards are eliminated. When the ratchet wheel 24 and the first mounting seat 21 are tightly attached, the ratchet teeth 23 can limit the relative rotation of the ratchet wheel and the first mounting seat, so that the framework 17 of the sunshade stays at the corresponding inclined angle.

The basic principle of the setting mode is the same, and the setting mode is only adjusted adaptively in different scenes. The use process is similar. Taking the technical solutions in fig. 1 to 5 as an example, when a user needs to open the sunshade, the framework 17 is only required to be driven to move away from the fixing rod 18 with force, the force is transmitted to the second mounting seat 22 through the framework 17, the second mounting seat 22 generates a rotation trend relative to the first pivot 20, the rotation trend is transmitted to the ratchet wheel 24 through the guide block 241 and the guide groove 222, the ratchet wheel 24 and the ratchet 23 generate a twisting trend, and under the action of the tooth surface, the two move away from each other against the acting force of the compression spring 25, so as to achieve unlocking. Of course, the ratchet 24 and ratchet 23 may be locked and unlocked multiple times before the user adjusts the frame 17 to the desired position.

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. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. There is not children's handcart in rotation gap, including the frame that can fold up and expand and install sunshade on the frame, the sunshade includes first mount pad and the second mount pad of connecting through first pivot rotation, one in first mount pad and the second mount pad with connected to the frame, another with the skeleton of sunshade is connected, its characterized in that, be equipped with the orientation on the first mount pad the ratchet of second mount pad, be equipped with on the second mount pad only can on the first pivot direction move with ratchet matched with ratchet and support and push away this ratchet and be close to the pressure spring of ratchet.

2. The stroller as recited in claim 1, wherein said second mounting seat is provided with a receiving cavity opening toward said ratchet teeth, said ratchet wheel slides in said receiving cavity to lock and unlock said ratchet teeth, and said compression spring is compressed between said ratchet wheel and said second mounting seat to maintain said ratchet wheel and said ratchet teeth locked.

3. A child stroller according to claim 2, wherein the ratchet wheel is arranged around the first pivot, a radially protruding guide block is provided on a circumferential surface of the ratchet wheel, and a guide groove for guiding the guide block along the first pivot is provided on an inner wall of the receiving cavity.

4. A child cart according to claim 3, wherein the plurality of guide blocks are arranged uniformly on the circumferential surface of the ratchet wheel, and each guide block abuts against a groove wall of the guide groove in the direction in which the ratchet wheel rotates about the first pivot.

5. The stroller as recited in claim 2, wherein a positioning portion is formed on a side of said ratchet wheel facing said receiving cavity for receiving at least a portion of said compression spring.

6. The stroller of claim 5, wherein said compression spring is disposed about said first pivot axis, and said positioning portion is provided with a retainer ring for preventing said compression spring from interfering with said first pivot axis.

7. The stroller of claim 1, wherein the sunshade further comprises a securing bar connected to the frame and a canopy connected between the securing bar and the frame, the frame being pivotable with the first mount or the second mount to move away from or toward the securing bar.

8. The child cart of claim 1, wherein the frame includes a foldable upper handle bar and a lower handle bar, the first mount being mounted to a rotational joint between the upper handle bar and the lower handle bar, the second mount being coupled to the frame.

9. The child cart of claim 1, wherein said frame is U-shaped, said first mounting means being two and disposed at respective ends of a U-shaped opening of said frame, said second mounting means being connected to said frame.