CN2452854Y - Three-wheel trolley safety folding device - Google Patents

Abstract

A safe folding device of tricycle handcart is featured as setting a safety device between connection seat and joint seat of folding device, setting a cylinder seat at pivot part of joint seat, forming a stop block at pivot block of connection seat, setting an action rod in cylinder seat, locking a pull block at external end section and setting a stop ring at internal end section to be against stop block; therefore, when in use, the action rod is stopped by the stop block of the connecting seat, so that the joint seat can not rotate, and the safe use effect that the folding device can not be folded even if the longitudinal operation is operated and the action rod can be folded by pulling the turning block to drive the action rod to move is achieved.

Description

Three-wheel trolley safety folding device

The utility model relates to a trolley for infants, in particular to a safety folding device for a three-wheeled trolley which can improve the safety of use and ensure the safe riding of infants.

As shown in Figure 1, the child's trolley 10 for walking is mainly equipped with a push handle 12 on the top side of a front frame 11, the rear side is pivotally connected to a rear frame 13, and the bottom side is assembled with a chassis 14, thus The frame body of the wheelbarrow 10 is assembled. The front and rear ends of the underframe 14 are respectively pivotally provided with wheels 15, and the top side of the front frame 11 is also equipped with a seat cover 16, and a sunshade cover 17 is pivotally installed between the push handle 12 and the front frame 11. In addition, A jack 111 is provided at the front end of the front vehicle frame 11, and a positioning seat 18 is provided in cooperation with the jack 111 at the front section of the underframe 14, and a positioning insertion rod 19 with resilience is inserted in the positioning seat 18. Thereby, when using the trolley 10, the front end of the front frame 11 can be placed in the positioning seat 18, and the positioning insert rod 19 is inserted into the socket 111 for positioning, and at the same time, the rear frame 13 is used to support the front cart Frame 11 and underframe 14 make the seat cover 16 of handcart 10 have a tension for lying on one's back. Although the trolley 10 has the function of being able to be used by infants, it is inconvenient to carry and cannot meet the needs of use because the folded length is still too long. Therefore, the applicant has applied for Chinese Taiwan No. 89205443 and No. 89205444 patents. The project is mainly to install a folding device between the front frame, the rear frame and the push handle of the trolley, including the connecting seat and the joint seat that are nested and hinged to each other and can generate a lock, and installed on the push handle. The operating handle on the handle has the feature that when the operating handle releases the lock between the joint seat and the connecting seat, the push handle can be bent downward to achieve the fold, and at the same time the folded volume of the trolley can be reduced. The two patents It does have the above functions, but if a safety design can be added to prevent the trolley from being folded even if the handle is accidentally moved, the safety of the trolley can be improved, and the safety of children can be ensured.

The purpose of the utility model is to provide a safety folding device for a three-wheeled trolley which has a high safety feature and can ensure children's riding safety.

The purpose of this utility model is achieved through the following technical solutions, providing a safety folding device for a three-wheeled trolley, which mainly installs a safety device between the joint seat and the connecting seat of the folding device of the trolley; wherein: the There is a simple seat extending from the pivot of the connecting seat. The pivot block of the connecting seat is formed with a stopper. An action rod is inserted into the cylinder seat. A retaining ring is protrudingly provided to resist the block, and an elastic element is sleeved on the action rod. One end of the elastic element is against the cylinder seat, and the other end is against the retaining ring; thereby, when the trolley is in use, the action rod The stop ring of the connecting seat interferes with the block of the connecting seat so that the connecting seat cannot rotate. Therefore, even if the retractable device is operated, the connecting seat cannot be folded because the connecting seat cannot be bent. It can be rotated, and can only be bent and folded relative to the retractable device.

The efficacy and advantages of the utility model three-wheel trolley safety folding device are that, because the utility model wants to close the trolley, the trigger block must be turned first to displace the action rod. The joint seat can only be rotated. At this time, the operating handle is operated to release the lock between the joint seat and the joint seat, and the push handle can be pressed down to drive the joint seat to rotate with the pivoting element as the rotating shaft, and then the trolley can be folded. Therefore, this utility model The new type features that when the user accidentally moves the operating handle, the design of the safety device still prevents the trolley from being folded, thereby improving the safety of use and the riding safety of children.

The following is a detailed description of the safety folding device for the three-wheeled trolley of the present invention through the preferred embodiment and the accompanying drawings. In the accompanying drawings:

Fig. 1 is a schematic perspective view of a trolley in the prior art.

Fig. 2 is a three-dimensional schematic view of a preferred embodiment of the utility model.

FIG. 3 is a partially exploded perspective view of the preferred embodiment of the present invention.

Fig. 4 is a schematic side view of the above-mentioned preferred embodiment of the utility model in use.

Fig. 5 is a partial cross-sectional schematic view of the above-mentioned preferred embodiment of the utility model in use.

Fig. 6 is a partial cross-sectional schematic diagram of the above-mentioned preferred embodiment of the utility model in the turning block.

FIG. 7 is a partial cross-sectional schematic view of the engaging seat in a rotating state in the preferred embodiment of the present invention.

Fig. 8 is a schematic diagram of the above-mentioned preferred embodiment of the present utility model after being folded.

As shown in Figure 2, the trolley 20 using the preferred embodiment of the utility model three-wheel trolley safety folding device is composed of a front frame 21, a rear frame 22, a push handle 23 and a group of linkage rods 24 groups. Constitute the main frame body, wherein the folding device includes a connecting seat 30 fixed on the top of the front frame rod 211 of the front frame 21, installed on the bottom end of the side frame rod 231 of the push handle 23 and the rear of the rear frame 22. The joint seat 40 between the tops of the frame bars 221, the operating handle 50 outside the side frame bar 231 of the push handle 23, and the operation handle 50 installed in the side frame bar 231 are connected, and the joint seat 40 can be connected with the operating handle 50 simultaneously. The connecting seat 30 generates a locking device (not shown in the figure, because it is not a feature of the present invention, so it will not be described in detail). The lock between the joint base 40 and the connection base 30 can be released by operating the handle 50 , and then the joint base 40 can be rotated to fold the trolley 20 . The improvement of the present utility model is that a safety device is installed between the joint seat 40 and the connection seat 30, as shown in Fig. The block 36 of the seat 30, the action rod 60 installed in the cylinder seat 47, the trigger 70 locked to the action rod 60, and the elastic element 80 sleeved on the action rod 60, wherein:

An insertion hole 31 is provided in the bottom end of the connecting seat 30 , which can be inserted into the top end of the front frame rod 211 and locked by the locking element 32 . The top end surface is made into a concave arc end surface 33, and two ear parts 34 and a pivot block 35 are formed outwardly. The pivot block 35 is pierced with a pivot hole 351, and a stopper 36 is formed outside the end surface of the pivot block 35. , In this embodiment, the stopper 36 is roughly in the shape of a semicircular arc protrusion.

An insertion hole 411 is defined in the top end portion 41 of the engaging seat 40 , for inserting the bottom end portion of the side frame rod 231 of the push handle 23 and locking it by the locking element 42 . A pivot seat 43 is formed downward on the bottom side of the top end 41 for the top end of the rear frame rod 221 to be inserted and pivotally connected by the pivot member 431 . The end surface of the bottom end 44 of the joint seat 40 is made into a convex arc end surface 441 corresponding to the concave arc end surface 33 of the connection seat 30, and the convex arc end surface 441 is provided with a groove 442 for the two ears 34 of the connection seat 30 to be inserted into. . In addition, the bottom of the bottom end portion 44 is downwardly formed into a pivot portion 45 for the pivot block 35 of the connecting seat 30 to be placed in, and the pivot element 46 is pivotally placed in the pivot holes 451, 351, so that the pivot portion 45 can be pivoted. Outside the pivot block 35 , the connecting base 40 and the connecting base 30 can rotate around the pivoting element 46 . In addition, the pivot portion 45 extends toward the pivot seat 43 to form a cylinder base 47, the cylinder base 47 has an inner chamber 471 communicating with the groove 442, and has an outer panel 472, and the outer panel 472 is provided with a perforation 473 communicating with the inner chamber 471 .

The action rod 60 is a rod body of a suitable length, its outer end section 61 is provided with a lock hole 611, and the inner end section 62 is protrudingly provided with a stop ring 621, in addition, the outside of the stop ring 621 is provided with a guide post 63 along its axial direction , and the guide post 63 is made with an oblique ring surface 631 with a reduced diameter.

The puller 70 is formed by forming a lock portion 72 on one side of the puller portion 71. The lock portion 72 is provided with a receiving groove 721 corresponding to the action rod 60, and an eccentric lock hole 722 is provided corresponding to the lock hole 611. , by locking the locking element 73 into the locking hole 611 and the eccentric locking hole 722, the puller 70 and the action rod 60 can be locked to each other.

In this embodiment, the elastic element 80 is a compression spring, which is sheathed outside the operating rod 60 , and has one end 81 abutting against the outer panel 472 of the barrel base 47 , and the other end 82 abutting against the retaining ring 621 of the actuating rod 60 .

Its use is shown in Figures 2, 3, and 4. When the trolley 20 of the present invention is in use, the connecting seat 30 and the engaging seat 40 are engaged with each other by means of their concave arc end surface 33 and convex arc end surface 441, and the connecting seat The two ear portions 34 of the connector 30 are inserted into the groove 442 of the connecting seat 40 , and meanwhile the connecting seat 30 and the connecting seat 40 are locked. And the front frame bar 21, the rear frame bar 22 are stretched and positioned by the linkage bar 24 so that the handcart 20 can be used for children to ride. As shown in FIG. 5 , when the trolley 20 is in use, because the stop ring 621 of the action lever 60 is against the stopper 36 of the connection seat 30, the operation handle 50 of the retractable device is operated to release the connection seat 30 and the joint seat. 40 lock, still because the stop ring 621 is against the block 36, the joint seat 40 cannot be rotated, so that the joint seat 40 and the connection seat 30 cannot be bent and folded relative to each other. This is the safety design of the present invention. When the user operates the handle 50 carelessly, the utility model still cannot be folded, thereby ensuring the child's riding safety.

When desiring to fold the trolley 20, as shown in Figure 6, first turn the puller 71 of the puller 70 to make the lock 72 relatively rotate, while the puller 70 is temporarily positioned, at this time, due to the eccentric lock hole 722 of the lock 72 It is locked with the action rod 60 by the locking element 73, so when the eccentric lock hole 722 rotates eccentrically, the action rod 60 can be driven by the locking element 73 to move in a relative straight line, so that the action rod 60 moves toward the barrel seat 47. The outer panel 472 is displaced in the direction, and at the same time, the retaining ring 621 is separated from the retaining block 36, and the elastic element 80 is in a compressed state. Continued as shown in Figure 7, when the stop ring 621 is disengaged from the block 36 by turning the switch 70, the joint seat 40 can be rotated, and then the handle 50 is operated to release the lock between the joint seat 40 and the connection seat 30 , then when the push handle 23 is pressed down hard, and at the same time, when the joint seat 40 is driven to pivot with the pivot member 46 as the rotating shaft, the guide column 63 of the action lever 60 can just be designed by its inclined ring surface 631 to make the guide The end surface of the column 63 is displaced along the arc surface of the stopper 36, thereby making the retraction operation smoother. When the push handle 23 is pressed down continuously, the trolley 20 can be retracted into the state shown in FIG. 8 .

Claims (3)

1, a kind of buggy safety folding mechanism, mainly form vehicle frame by a front vehicle frame, a back vehicle frame, a handle and one group of trace, the Connection Block of this folding mechanism is installed in the front vehicle frame top, joining base is installed between this handle and the back vehicle frame, the mutual fit of this Connection Block and joining base articulates and can produce kayser, one operating handle is installed in handle, can remove the kayser of joining base and Connection Block when the manipulation operations handle, it is characterized in that:

Be equiped with a safety device between joining base and the Connection Block, this joining base, a corresponding cylinder base, the block of forming of Connection Block, one throw rod places into this cylinder base, the outer end section lockhole and one that one interlocking element locks in this throw rod is pulled the eccentric lockhole of piece, convexes with can the conflict block of Connection Block of a baffle ring as for the inner section of this throw rod.

2, buggy safety folding mechanism as claimed in claim 1, it is characterized in that: an elastic element is sheathed on this throw rod, and the one end is butted on cylinder base, and end is butted on the baffle ring of throw rod in addition.

3, buggy safety folding mechanism as claimed in claim 1 is characterized in that: the inner section of this throw rod has extended a guide pillar in the baffle ring outside, and the block that reaches this Connection Block is a circular arc projection, makes the guide pillar end face can carry over its arc surface displacement.

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