Large joint folding structure of baby carriage

Abstract

The utility model relates to the field of baby carriages, and discloses a baby carriage large joint folding structure which comprises a base, a cover plate is detachably installed on the surface of the base, a guide plate is fixedly connected to the inner side wall of the cover plate, a fork arm a is rotationally connected to the inner wall of the right side of the base, and a connecting rod is hinged to the surface of the fork arm a. A fork arm b is hinged to the end, away from the fork arm a, of the connecting rod, the connecting rod is elastically connected to the inner side wall of the base through a tension spring, and a positioning assembly is arranged on the inner wall of the fork arm a. According to the baby carriage folding mechanism, by means of reasonable cooperation of the guide plate, the connecting rod, the tension spring and other components, when a baby carriage is folded and folded, all the components can smoothly and cooperatively move according to a set track and logic, the folding operation can be easily completed only by simply pulling the steel wire to relieve fixation of the positioning pin and manually rotating the fork arm, and the operation is convenient. The problems of blocking, jamming, unreasonable reverse rotation and the like are avoided, and operation is convenient, fast and efficient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of baby carriage, especially a big joint folding structure of baby carriage. BACKGROUND

[0002] Baby carriage is a kind of moving tool designed for infants or children, which is convenient for parents to carry and take care of children when going out.

[0003] And the big joint folding structure is the key part to determine whether the baby carriage can be conveniently stored, transported and flexibly used. A well-designed big joint folding structure can keep the baby carriage stable and reliable when in use, providing a safe and comfortable riding environment for the baby. When not in use, it can be easily folded up, reducing the occupied space and facilitating storage at home, carrying outside and boarding transportation tools, greatly improving the practicality and convenience of the baby carriage.

[0004] At present, the existing big joint of baby carriage has some deficiencies: the folding structure of many baby carriages is relatively complex to operate, and some need to operate multiple components and perform multiple steps to complete folding, which is extremely inconvenient for parents holding babies or carrying objects. Moreover, during the folding process, the components may be stuck and unable to rotate and reset smoothly, affecting the efficiency and experience of folding, and even causing the entire baby carriage to fail to fold and store normally, which causes trouble for travel. Therefore, a big joint folding structure of baby carriage is proposed to solve the above problems. SUMMARY

[0005] To make up for the above deficiencies, the utility model provides a big joint folding structure of baby carriage, which aims to improve the problem that some existing technologies need to operate multiple components and perform multiple steps to complete folding, which is extremely inconvenient for parents holding babies or carrying objects.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: a big joint folding structure of baby carriage, including base, the surface of base is detachably installed with cover plate, the inner side wall of cover plate is fixedly connected with guide plate, the right inner wall of base is rotatably connected with fork arm a, the surface of fork arm a is hingedly connected with connecting rod, the end of connecting rod away from fork arm a is hingedly connected with fork arm b, connecting rod is elastically connected in the inner side wall of base through tension spring, the inner wall of fork arm a is provided with positioning assembly.

[0007] Further description of the above technical scheme:

[0008] The positioning assembly includes a positioning pin, which is elastically connected to the inner wall of the top end of the fork arm a through a return spring.

[0009] As a further description of the above technical solutions:

[0010] The inner wall of the left side of the fork arm b is rotationally connected to the inner wall of the left side of the base, one end of the tension spring is hingedly connected to the inner side wall of the connecting rod, and the other end of the tension spring is hingedly connected to the inner wall of the bottom end of the base.

[0011] As a further description of the above technical solutions:

[0012] Two groups of arc-shaped grooves are formed in the surface of the guide plate, protrusions are arranged on the two sides of the connecting rod, and the two sides of the connecting rod are slidingly connected to the inner walls of the arc-shaped grooves of the guide plate.

[0013] As a further description of the above technical solutions:

[0014] One end of the reset spring is fixedly connected to the inner wall of the top end of the fork arm a, and the other end of the reset spring is fixedly connected to the outer wall of the positioning pin.

[0015] As a further description of the above technical solutions:

[0016] The positioning pin is slidingly connected to the inner wall of the top end of the fork arm a.

[0017] As a further description of the above technical solutions:

[0018] The inner wall of the base is provided with a clamping groove, and the outer wall of the positioning pin is in contact with the inner wall of the clamping groove.

[0019] As a further description of the above technical solutions:

[0020] The left side of the fork arm a is provided with a notch, and the outer wall of the positioning pin corresponds to the notch.

[0021] The utility model has the advantages of the following beneficial effects:

[0022] 1. In the utility model, the reasonable cooperation of the guide plate, the connecting rod, the tension spring and other components can ensure smooth and coordinated movement of the components according to the set trajectory and logic during folding and closing of the baby carriage, and the folding and closing operation can be easily completed by simply pulling the steel wire to release the fixation of the positioning pin and manually rotating the fork arm, thereby avoiding problems such as jamming, locking and unreasonable reverse rotation, and the operation is convenient and efficient, the occupied space is reduced, and storage and transportation are facilitated.

[0023] 2. In the utility model, the positioning pin and the base clamping groove are tightly clamped, the position of the fork arm can be firmly fixed in the unfolded use state of the baby carriage, accidental rotation of the fork arm caused by external force and other factors is effectively prevented, a safe and stable riding environment is provided for the baby, the safety and reliability during use of the baby carriage are greatly improved, parents can use it with peace of mind, and the strict requirement of the stability of the baby carriage during child care travel is met. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the large joint folding structure of a baby stroller proposed in this utility model.

[0025] Figure 2 This is a schematic diagram of the base and cover plate of a baby stroller's large joint folding structure in the separated state, as proposed in this utility model.

[0026] Figure 3 This is a three-dimensional structural diagram of the connecting rod and tension spring of the large joint folding structure of a stroller proposed in this utility model.

[0027] Figure 4 This is a partial cross-sectional view of the fork arm a of the large joint folding structure of a stroller proposed in this utility model.

[0028] Legend:

[0029] 1. Base; 2. Cover plate; 3. Guide plate; 4. Fork arm a; 5. Positioning assembly; 51. Positioning pin; 52. Return spring; 6. Linkage rod; 7. Tension spring; 8. Fork arm b. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 - Figure 3The utility model provides an embodiment: a big joint folding structure of baby carriage, the surface of base 1 detachably installs cover plate 2, the installation mode of cover plate 2 and base 1 is the plastic wedge block clamping mode commonly seen in the prior art, the inboard side wall of cover plate 2 is fixedly connected with guide plate 3, the surface of guide plate 3 is equipped with two groups of arc grooves, the both sides of connecting rod 6 are provided with lug, the both sides of connecting rod 6 are slidably connected in the inner wall of the arc groove of guide plate 3, the arc groove is set up on the surface of guide plate 3, so that the rotation of fork arm a 4 can drive connecting rod 6 to rotate synchronously, and connecting rod 6 also slides on the inner wall of the arc groove of guide plate 3 synchronously, so that the other end articulated fork arm b 8 is driven to move towards each other, the inboard side wall of base 1 is rotatably connected with fork arm a 4, the surface of fork arm a 4 is hingedly connected with connecting rod 6, one end of connecting rod 6 away from fork arm a 4 is hingedly connected with fork arm b 8, the bottom end of fork arm b 8 is equipped with lug, so that connecting rod 6 can only move down to drive fork arm b 8 to rotate, and the reverse rotation of connecting rod 6 is resisted by the lug of fork arm b 8, so that it cannot be turned over, and the surface of fork arm a 4 and fork arm b 8 is equipped with mounting hole, and the whole can be installed on the baby carriage through the mounting hole.

[0032] Referring to Figure 2 and Figure 3 , fork arm b 8 is rotatably connected to the inboard side wall of base 1, connecting rod 6 is elastically connected to the inboard side wall of base 1 through tension spring 7, one end of tension spring 7 is hingedly connected to the inboard side wall of connecting rod 6, the other end of tension spring 7 is hingedly connected to the inboard side wall of the bottom end of base 1, the function of tension spring 7 is to pull the position of connecting rod 6 after moving with fork arm a 4, so as to avoid that fork arm a 4 drives connecting rod 6 to turn over too much to reach the dead point position, and the reverse rotation of fork arm a 4 cannot drive connecting rod 6 to reset, and tension spring 7 can also reset the position of connecting rod 6 after unfolding, and the inboard side wall of fork arm a 4 is provided with positioning assembly 5.

[0033] Referring to Figure 3 and Figure 4, the positioning component 5 comprises a positioning pin 51, a pin hole is formed in the surface of the positioning pin 51, a steel wire is installed in the pin hole, a cavity is formed in the center of the fork arm a4, so that the steel wire can pass through the cavity of the fork arm a4 to pull the positioning pin 51, a clamping groove is formed in the inner wall of the base 1, the outer wall of the positioning pin 51 is in contact with the inner wall of the clamping groove, the contact between the two fixes the position of the fork arm a4 and the fork arm b8 after being unfolded, the fork arm a4 and the fork arm b8 cannot rotate when the contact of the positioning pin 51 with the clamping groove of the base 1 is not removed, the positioning pin 51 is slidingly connected to the inner wall at the top end of the fork arm a4, a notch is formed in the left side of the fork arm a4, the outer wall of the positioning pin 51 corresponds to the notch, by forming the notch in the top end of the left side of the fork arm a4, the positioning pin 51 will move in the inner wall of the fork arm a4 when being pulled by the steel wire, so as to separate from the clamping groove of the base 1 and completely enter the inside of the fork arm a4, at this time, the rotation of the fork arm a4 is cancelled due to the limiting of the positioning pin 51 in the inside, so that the fork arm a4 can rotate to drive the connecting rod 6 and the fork arm b8 to be folded.

[0034] With reference to Figure 4 , the positioning pin 51 is elastically connected to the inner wall at the top end of the fork arm a4 by a return spring 52, one end of the return spring 52 is fixedly connected to the inner wall at the top end of the fork arm a4, the other end of the return spring 52 is fixedly connected to the outer wall of the positioning pin 51, the return spring 52 serves to automatically reset the position of the positioning pin 51 after being pulled by the steel wire, and after the fork arm a4 is reversed to synchronously unfold the fork arm b8 through the connecting rod 6, the positioning pin 51 will be elastically acted on by the return spring 52 to return to the initial position to contact the inner wall of the clamping groove of the base 1, so as to fix the position of the fork arm a4 to synchronously unfold the fork arm b8 through the connecting rod 6.

[0035] Working principle: in the normal use state of the baby carriage, i.e. when the fork arm a4 and the fork arm b8 are unfolded, the outer wall of the positioning pin 51 is in close contact with the clamping groove in the inner wall of the base 1 under the action of the return spring 52, this clamping mode fixes the positions of the fork arm a4 and the fork arm b8, ensures the stability of the joint part of the baby carriage during use, prevents the fork arm from accidentally rotating due to external force and other factors, and ensures the safety of the baby, when the baby carriage needs to be folded, the steel wire passing through the cavity of the fork arm a4 (the steel wire is connected with the pin hole of the positioning pin 51) is pulled, the steel wire will pull the positioning pin 51 to move inward in the inner wall of the fork arm a4, the return spring 52 is compressed, the positioning pin 51 is separated from the contact with the clamping groove of the base 1, and completely enters the inside of the fork arm a4 (since the notch is formed in the top end of the left side of the fork arm a4, space is provided for the movement of the positioning pin 51), at this time, the rotation limitation of the fork arm a4 is removed, so that the fork arm a4 can rotate to drive the connecting rod 6 and the fork arm b8 to be folded.

[0036] The fork arm a4 is manually rotated, and the rotation of the fork arm a4 drives the connecting rod 6 connected with the fork arm a4 to rotate synchronously. Since the protrusions on both sides of the connecting rod 6 are slidingly connected to the inner wall of the arc-shaped slot of the guide plate 3, the protrusions slide along the track of the arc-shaped slot during the rotation of the connecting rod 6, which limits the movement path of the connecting rod 6 and makes the connecting rod 6 move along a specific arc-shaped track. With the rotation and sliding of the connecting rod 6, the fork arm b8 connected to the other end of the connecting rod 6 is driven by the connecting rod 6. Due to the design of the protrusion at the bottom end of the fork arm b8, the connecting rod 6 can only rotate downward when driving the fork arm b8 to move (to prevent unreasonable reverse rotation), so that the fork arm a4 and the fork arm b8 are folded towards each other, the folding action of the joint part of the stroller is completed, the occupied space is reduced, and the stroller is convenient to store and transport. During the movement of the connecting rod 6 driven by the rotation of the fork arm a4, the tension spring 7 plays an important role. Without the tension spring 7, if the rotation angle of the fork arm a4 is too large, the connecting rod 6 may be flipped to a dead point position, so that the fork arm a4 cannot drive the connecting rod 6 to reset smoothly in the reverse direction, which affects the normal folding operation of the stroller. The existence of the tension spring 7 can pull the position of the connecting rod 6 to avoid reaching the dead point position, so that the connecting rod 6 can always move within a suitable range during the rotation of the fork arm a4. After the folding action of the fork arm a4 is completed, the elastic potential energy of the tension spring 7 can help the connecting rod 6 to return to the initial unfolded preparation state, so that the stroller is ready for the next use, and the reliability and repeatability of the joint folding structure of the stroller are ensured.

[0037] After the folding operation is completed, when the stroller needs to be unfolded again, the fork arm a4 is rotated in the reverse direction. With the rotation of the fork arm a4, the connecting rod 6 drives the fork arm b8 to unfold synchronously. When the fork arm a4 and the fork arm b8 are unfolded to a suitable use position, the positioning pin 51 is re-stretched out of the outer wall of the fork arm a4 under the elastic restoring force of the reset spring 52, and is inserted into the clamping groove in the inner wall of the base 1, so as to fix the fork arm a4, the fork arm b8 and the entire joint part of the stroller in the unfolded use state, and facilitate the next use.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A large joint folding structure of a baby carriage comprising a chassis (1), characterized in that: The surface of the base (1) is detachably installed with a cover plate (2), the inner side wall of the cover plate (2) is fixedly connected with a guide plate (3), the right inner wall of the base (1) is rotatably connected with a fork arm a (4), the surface of the fork arm a (4) is hingedly connected with a connecting rod (6), one end of the connecting rod (6) away from the fork arm a (4) is hingedly connected with a fork arm b (8), the connecting rod (6) is elastically connected to the inner side wall of the base (1) through a tension spring (7), and the inner wall of the fork arm a (4) is provided with a positioning assembly (5).

2. A universal joint folding structure for a baby carriage according to claim 1, wherein: The positioning assembly (5) comprises a positioning pin (51), and the positioning pin (51) is elastically connected to the inner wall of the top end of the fork arm a (4) through a return spring (52).

3. A universal joint folding structure for a stroller as defined in claim 1 wherein: The fork arm b (8) is rotatably connected to the inner wall of the left side of the base (1), one end of the tension spring (7) is hingedly connected to the inner side wall of the connecting rod (6), and the other end of the tension spring (7) is hingedly connected to the inner wall of the bottom end of the base (1).

4. A universal joint folding structure for a baby carriage according to claim 2, wherein: The surface of the guide plate (3) is provided with two groups of arc-shaped grooves, the two sides of the connecting rod (6) are provided with protrusions, and the two sides of the connecting rod (6) are slidably connected to the inner walls of the arc-shaped grooves of the guide plate (3).

5. A universal joint folding structure for a baby carriage according to claim 2, wherein: One end of the return spring (52) is fixedly connected to the inner wall of the top end of the fork arm a (4), and the other end of the return spring (52) is fixedly connected to the outer wall of the positioning pin (51).

6. A universal joint folding structure for a baby carriage according to claim 2, wherein: The positioning pin (51) is slidably connected to the inner wall of the top end of the fork arm a (4).

7. A universal joint folding structure for a baby carriage according to claim 2, wherein: The inner wall of the base (1) is provided with a clamping groove, and the outer wall of the positioning pin (51) is in contact with the inner wall of the clamping groove.

8. A universal joint folding structure for a baby carriage according to claim 2, wherein: The left side of the fork arm a (4) is provided with a notch, and the outer wall of the positioning pin (51) corresponds to the notch.

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