CN106004971B - Lifting folding handcart - Google Patents

Abstract

The invention discloses a lifting and folding type folding handcart, which comprises a main handcart body capable of being folded and folded, wherein a handle part is arranged on the main handcart body, and the main handcart body can be folded and folded under the action of self gravity by lifting and pulling the handle part. According to the foldable trolley, the main trolley body can be folded and folded under the action of self gravity by lifting the lifting handle part, the folding step is greatly simplified, and the folding operation of the main trolley body can be finished by one hand, so that the main trolley body can be conveniently and quickly folded and folded.

Description

A kind of pulling and folding type trolley

technical field

The invention relates to the field of trolleys.

Background technique

Trolleys are often used as strollers for infants and young children when traveling, and can also be used as wheelchairs, shopping carts, etc. The trolleys are relatively large. In order to facilitate carrying and storage, most of the trolleys are currently made of foldable structures. Because the trolleys are folded during the folding process The center of gravity will change, the distance between the front wheels and the rear wheels will also be reduced, and there are more parts to be folded, so if you need to fold the car body while keeping the car body upright, you usually need both hands to press it at the same time. Tighten the front and rear ends of the car body. In addition, it is necessary to hold the car body to fold the seat frame, push rod, canopy and other mechanisms. Although it is convenient to carry out the folding operation to a certain extent, it is also easy to dirty the car body and the cloth cover on the car body, and the operation is also complicated and time-consuming, and it is inconvenient to use.

Contents of the invention

In order to solve the above problems, the object of the present invention is to provide an easy-to-use lifting and folding folding trolley that can be folded and folded conveniently and quickly.

The technical scheme that the present invention adopts for solving its technical problem is:

A pull-and-fold foldable trolley, comprising a foldable and foldable main body. A handle is provided on the main body. By pulling the handle, the main body can be folded under the action of its own gravity. combine.

Preferably, the main vehicle body includes a front frame, a rear frame, a seat frame and a connecting frame, the front frame has a first link section, and the rear frame has a first There are two connecting rod sections, the seat frame has a third connecting rod section, the first connecting rod section, the second connecting rod section, the connecting frame and the third connecting rod section are pivotally connected end-to-end in sequence to form a A foldable four-bar linkage mechanism, and during the folding and folding process of the main vehicle body, the rotation direction of the first link section and the second link section is opposite to the pivot joint between the two, and the third link section The direction of rotation of the segments and the link is reversed relative to the pivotal joint between the two.

Preferably, the handle portion is arranged on the third link segment and/or the connecting frame and is close to the pivot joint between the third link segment and the connecting frame.

Preferably, the seat frame is provided with a seat cover, and the handle part is provided on the seat cover.

Preferably, one of the third connecting rod segment and the connecting frame has a limiting part, and the limiting part is abutted against the other of the two to limit the third connecting rod segment and the connecting frame. The angle by which the shelf turns in the opposite direction to the direction it turns when folded.

Preferably, the main vehicle body is provided with an unlockable first locking mechanism, and the first locking mechanism is used to prevent the main vehicle body from being folded and closed.

Preferably, the seat frame is pivotally provided with an armrest frame through a first transverse pivot shaft, and the armrest frame has a winding portion surrounding the first pivot shaft, and the first locking mechanism It includes a first traction rope, a positioning pin arranged on the seat frame by lateral sliding, and a positioning pin hole opened on the connecting frame and matched with the positioning pin. One end of the first traction rope is connected to the On the winding part, the other end is connected with the positioning pin, and the positioning pin is horizontally inserted in the positioning pin hole to limit the relative rotation between the seat frame and the connecting frame. When the armrest frame rotates around the first pivot shaft, the second A pulling rope can be wound on the winding part to pull the positioning pin out of the positioning pin hole.

Preferably, it also includes a push rod frame, the push rod frame is pivotally arranged on the main vehicle body through a second pivot shaft, and a gear-shaped first locking mechanism is slidably arranged on one of the push rod frame and the main vehicle body. part, the other is provided with a first locking groove matching the first locking part, and the first locking part is inserted into the first locking groove to limit the push rod frame relative to the main vehicle body around the second pivot. When connecting the rotation of the shaft, a first driving assembly is arranged on the push rod frame or the main vehicle body, through which the first locking member can be moved out of the first locking groove.

Preferably, it also includes a back frame, the back frame is pivotally arranged on the main vehicle body through a third pivot shaft, a gear-shaped second locking piece is slidably arranged on one of the back frame and the main vehicle body, and the other One is provided with a second locking groove matching the second locking piece, and the second locking piece is inserted into the second locking groove to limit the rotation of the backrest frame relative to the main vehicle body around the third pivot axis , the back frame or the main vehicle body is provided with a second driving assembly, through which the second locking member can be moved out of the second locking groove.

Preferably, the main vehicle body or the back frame is also provided with an unlockable double locking mechanism, which is used to limit the action of the second driving assembly to prevent the second driving assembly from moving the second locking member from out of the second locking slot.

The beneficial effects of the present invention are: in the present invention, the main vehicle body can be folded and folded under the action of its own gravity by pulling the handle part, which greatly simplifies the folding steps, and the main vehicle body can be completed with one hand. Folding operation, so that the main body can be folded and folded conveniently and quickly, and there is no need to place the main body flat on the ground during the folding process, and it is not easy to dirty the trolley. In addition, using the handle part It is also convenient to lift and carry the trolley, which is convenient for use.

Description of drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is an overall structural diagram of the present invention;

Fig. 2 is a partial enlarged view of part A in Fig. 1;

Fig. 3 is a side view of the present invention;

Fig. 4 is a partial exploded view of the present invention;

Fig. 5 is a partially enlarged view of part B in Fig. 4;

Fig. 6 is a partially enlarged view of part C in Fig. 4;

Fig. 7 is the structural view of the back view of the seat frame and the connecting frame part in the present invention;

Fig. 8 is an exploded view of the seat frame and the connecting frame part in the present invention;

Fig. 9 is a partially enlarged view of part D in Fig. 8;

Fig. 10 is an exploded view of another angle of view of the seat frame and the connecting frame part in the present invention;

Fig. 11 is a partially enlarged view of part E in Fig. 10 .

Detailed ways

Referring to Fig. 1 to Fig. 3, a pull-foldable folding trolley includes a foldable and foldable main body, and a handle part (not shown in the figure) is arranged on the main body, by pulling the handle The main car body can be folded and folded under the action of its own gravity. In the present invention, the main car body can be folded and folded under the action of its own gravity by pulling the handle, which greatly simplifies the folding steps. The folding operation of the main car body can be completed by hand, so that the main car body can be folded and folded conveniently and quickly, and there is no need to place the main car body flat on the ground during the folding process, which is not easy to get dirty In addition, the handcart can be easily lifted and carried by using the handle portion, which is convenient for use.

In this embodiment, the main vehicle body includes a front frame 10, a rear frame 20, a seat frame 30 and a connecting frame 40, the front frame 10 has a first link section 11, and the rear frame 20 There is a second link section 21, a third link section 31 is provided on the seat frame 30, the first link section 11, the second link section 21, the connecting frame 40 and the third link section 31 are sequentially connected end to end Pivoted together to form a foldable four-bar linkage mechanism, and during the folding and folding process of the main vehicle body, the first link section 11 and the second link section 21 are opposite to the pivot joint between the two The direction of rotation is opposite, and the rotation direction of the third link segment 31 and the connecting frame 40 is opposite to the pivot joint between the two. Like this, when the handle is lifted to lift the main vehicle body, the front frame 10 and the The rear frame 20 can be rotated and folded towards the central position of the main vehicle body under the action of its own gravity, and, in this embodiment, the difference between the lengths of the first link section 11 and the third link section 31 is approximately equal to the second link section 31. The difference between the length of the connecting rod section 21 and the seat frame 30, after the main vehicle body is folded, the front frame 10, the rear frame 20, the seat frame 30 and the connecting frame 40 can be roughly parallel to each other and close to each other. Together, it is beneficial to reduce the volume of the folded trolley, which is convenient for storage and carrying. Of course, in practical applications, the main vehicle body can also adopt other suitable and commonly used foldable and collapsible structures, such as other forms of connecting rod structures and linkage structures, etc., and is not limited thereto. In this embodiment, the first link section 11 is a section at the top of the front frame 10, the second link section 21 is a section at the top of the rear frame 20, and the third link section 31 is a section at the rear of the seat frame 30. Of course, in practical applications, these connecting rod sections can also be a section of other parts on the corresponding vehicle frame. In addition, the main vehicle body is provided with a canopy frame 50 for installing an awning, and the bottom of the front wheel frame is equipped with a front wheel. 12, the bottom of rear wheel frame is equipped with rear wheel 22.

The handle portion can be arranged on the third link section 31 and/or the connecting frame 40 and close to the pivot joint of the third link section 31 and the connecting frame 40, so that the seat frame 30 and the The pivot joint of connecting frame 40 moves upwards, and under the action of the gravity of the main vehicle body itself, seat frame 30 and connecting frame 40 can be rotated and folded around its pivot joint, driven by seat frame 30 and connecting frame 40 and Under the action of its own gravity, the front frame 10 and the rear frame 20 can also be rotated and folded around their pivot joints, which can effectively utilize the gravity of the main body to drive the main body to fold and fold, and the gravity of the main body can be adjusted. In order to make full use of it, the smoothness of the main body can be effectively improved. Of course, in practical applications, the handle portion can also be arranged on other positions of the main body. In this embodiment, the seat frame 30 is provided with a seat cover (not shown in the figure), and the handle portion is arranged on the seat cover. The seat cover is usually a soft cloth cover, which is used to improve the ride comfort of infants. The handle part can be made of a soft handle with cloth, which can be folded and stored on the seat cover when the main body is unfolded for use. Comfortable, convenient for users to carry the trolley. Of course, in practical applications, the handle portion can also be directly installed on the seat frame 30 or the connecting frame 40, or made of other materials such as metal, plastic, etc., and is not limited to this .

One of the third connecting rod section 31 and the connecting frame 40 has a limiting portion 32, and the limiting portion 32 abuts against the other of the two for limiting the third connecting rod section 31 and the connecting frame. 40 to the angle of rotation in the direction opposite to the direction of rotation when it is folded, the degree of expansion of the main vehicle body can be positioned, and the expansion operation is facilitated, and the load-bearing capacity of the seat frame 30 can also be improved. In this embodiment, the stopper 32 is set On the seat frame 30 and in contact with the top of the connecting frame 40 , of course, the limiting portion 32 may also be arranged at other positions on the seat frame 30 or the connecting frame 40 in practical applications.

Referring to Fig. 4 to Fig. 6, this trolley also comprises a push rod frame 60, and this push rod frame 60 is pivotally arranged on the main vehicle body through a second pivot shaft 92, and one of the push rod frame 60 and the main vehicle body A gear-shaped first locking piece 61 is slidably provided on the upper side, and a first locking groove 62 matched with the first locking piece 61 is provided on the other, and the first locking piece 61 is inserted in the first locking groove 62 to limit pushing. Rod frame 60 rotates around the second pivot shaft 92 relative to the main vehicle body, and a first drive assembly is arranged on the push rod frame 60 or the main vehicle body, by which the first locking member 61 can be locked from the first Move out in the slot 62, because the first locking member 61 is in the shape of a gear, it can lock the push rod frame 60 at multiple angles, and the user can easily adjust the push rod frame 60 to a comfortable angle for use, and can also conveniently Realize the reversing of the push rod frame 60. When the cart needs to be used in a relatively narrow place, the reverse movement and use of the cart can be easily realized through the reversing of the push rod frame 60 without turning around the cart, which is convenient to use , It is also convenient for the user to check the status of the occupants such as infants and young children. In this embodiment, the first locking member 61 and the first driving assembly are arranged on the push rod frame 60, the first locking groove 62 is arranged on the front frame 10, which is easy to assemble and handle, and the first driving assembly includes a rotatable A rotary drum 63 on the push rod frame 60, a guide block 64 slidably arranged on the push rod and a shift block 65 which is slidably arranged on the rotary drum 63, the push rod frame 60 is provided with a matching push block 65 The first safety slot 66, the drum 63 is provided with a first guide surface 631 that matches the guide block 64, and the guide block 64 connects with the first locking member 61 through a second traction rope (not shown in the figure). Connected, when the user rotates the drum 63, the first guide surface 631 can push the guide block 64 to slide, and the guide block 64 then pulls the first locking member 61 to slide through the second traction rope, and the shift block 65 is inserted in the first In the safety groove 66, it is used to limit the rotation of the rotating drum 63. In this way, when unlocking the push rod frame 60, it is necessary to first push the shifting block 65 out of the first safety groove 66, and then rotate the rotating drum 63, which can effectively avoid misuse. Operation can also prevent infants from unlocking the push rod frame 60 by themselves, which can improve the safety performance of the trolley. Of course, in practical applications, the first drive assembly can also adopt other commonly used structures such as handwheels, etc., and is not limited thereto. In addition, in the present embodiment, a brake member 67 is also arranged on the push rod frame 60, and the brake member 67 is connected with the brake mechanism in the rear wheel 22 through a third traction rope 68. The rear wheel 22 is locked by the brake member 67 to prevent the trolley from sliding, which is convenient for use.

7 to 11, the main body is provided with an unlockable first locking mechanism, the first locking mechanism is used to prevent the folding of the main body, so as to maintain the main body in the unfolded state and prevent the main body from being folded. The car body folds itself during use. In this embodiment, an armrest frame 70 is pivoted on the seat frame 30 via a first transverse pivot shaft 91, and the armrest frame 70 has a winding portion 71 surrounding the first pivot shaft 91, the first The locking mechanism includes a first traction rope 72, a positioning pin 73 which is horizontally slidably arranged on the seat frame 30, and a positioning pin hole 74 which is provided on the connecting frame 40 and matches the positioning pin 73. The first traction rope 72 One end of one end is connected on the winding part 71, and the other end is connected with the positioning pin 73, and the positioning pin 73 is horizontally inserted in the positioning pin hole 74 to limit the relative rotation between the seat frame 30 and the connecting frame 40, and the armrest frame 70 is wound around When the first pivot shaft 91 rotates, the first traction rope 72 can be wound on the winding portion 71 to pull out the positioning pin 73 from the positioning pin hole 74. The armrest frame 70 is a common structure on the handcart for supplying The first locking mechanism uses the armrest frame 70 as a switch, which is simple in structure, easy to produce and use, and convenient to monitor. Of course, in practical applications, other commonly used locking structures can also be used for the first locking mechanism. limited to this. An unlockable second locking mechanism is arranged between the armrest frame 70 and the seat frame 30, and the second locking mechanism is used to limit the rotation of the armrest frame 70 relative to the seat frame 30, so as to prevent the armrest frame 70 from rotating by itself or being taken by infants, etc. The person pushes and rotates to unlock the first locking mechanism. The second locking mechanism is widely used in this field and has various forms and structures. In practical applications, it can be flexibly selected according to needs. In this embodiment, the second locking mechanism includes a push The locking button 75, the locking button 75 is also provided by sliding a gear-shaped third locking member (not shown in the figure) on the armrest frame 70 and a third locking groove (not shown in the figure) opened on the seat frame 30 Not shown) to limit the rotation of the armrest frame 70, these are common structures in the field, and will not be described in detail here.

The present invention also includes a backrest frame 80, which is pivotally mounted on the main vehicle body through a third pivot shaft 93, and a gear-shaped second locking mechanism is slidably arranged on one of the backrest frame 80 and the main vehicle body. 81, the other is provided with a second locking groove 82 that matches the second locking piece 81, and the second locking piece 81 is inserted in the second locking groove 82 to limit the rotation of the backrest frame 80 relative to the main vehicle body around the third pivot. Rotation of connecting shaft 93, back frame 80 or main vehicle body are provided with a second driving assembly, second locking part 81 can be moved out from second locking groove 82 by this second driving assembly, same, because this second The locking member 81 is in the shape of a gear, so the backrest frame 80 can also be locked at multiple angles, and the angle of the backrest frame 80 can be easily adjusted to switch between lying and sitting positions, which can effectively improve the comfort of the ride. It is convenient to use. In this embodiment, the second locking member 81 is arranged on the backrest frame 80, and the second locking groove 82 is arranged on the seat frame 30. Of course, in practical applications, the positions of the two can be reversed, and the second locking groove 82 is arranged on the seat frame 30. The groove 82 can also be arranged at other positions on the main vehicle bodies such as the front frame 10 and the rear frame 20 . The second drive assembly in this embodiment includes a push block 83 slidably arranged on the backrest frame 80 , the push block 83 is connected with the second locking member 81 through the fourth traction rope 84 , and has a simple structure and is easy to use. Of course, in practical applications, the second drive assembly can also use other commonly used structures such as a rotating wheel and a driving lever, and is not limited thereto.

The main vehicle body or the back frame 80 is also provided with an unlockable double locking mechanism, which is used to limit the action of the second driving assembly to prevent the second driving assembly from moving the second locking member 81 from the second locking groove. 82, can prevent the backrest frame 80 from loosening and rotating automatically during use due to misoperation, can effectively ensure the safety of the occupants such as infants and young children, and improve the safety performance of the trolley. In this embodiment, the double locking The mechanism includes a sliding piece 85 and a safety button 86 which are slidably arranged on the backrest frame 80. The push block 83 is provided with a second safety groove 87 matched with the sliding piece 85, and one end of the sliding piece 85 is inserted into the second safety button. In order to limit the movement of the push block 83 in the groove 87, the safety button 86 is provided with an inclined second guide surface 861. When the safety button 86 is pressed, the second guide surface 861 can push the slider 85 to move away from the push block. 83. Of course, in practical applications, other commonly used locking mechanisms can also be selected for the double locking mechanism, and the present invention is not limited thereto.

The above descriptions are only the preferred implementation modes of the present invention, as long as the technical solutions to achieve the purpose of the present invention by basically the same means fall within the scope of protection of the present invention.

Claims (7)

1. a kind of lifting folding folding pushchair, it is characterised in that：Include the main car body of a Foldable, is set on main car body It is equipped with a handle portion, main car body can be made to fold under the effect of gravity by lifting the handle portion and folded；The main vehicle Body includes a front frame (10), a Rear frame (20), a seat frame (30) and a link (40), in the front frame (10) With a first connecting rod section (11), there is a second connecting rod section (21) in Rear frame (20), there is a third on seat frame (30) Connecting rod section (31), the first connecting rod section (11), second connecting rod section (21), link (40) and third connecting rod section (31) are successively End to end be articulated and the four-bar mechanism for forming a Foldable, and fold process in the folding of main car body In, first connecting rod section (11) and second connecting rod section (21) relatively between the two the rotation direction of articulated section on the contrary, third connecting rod section (31) and link (40) is reversed relative to the rotation of articulated section between the two on the contrary, being provided with one on the main car body can unlock First locking mechanism, for preventing the folding of main car body from folding, the seat frame passes through the first locking mechanism on (30) One lateral the first drive-connecting shaft (91) is pivoted with an arm-rest frame (70), has on the arm-rest frame (70) and is looped around the first drive-connecting shaft (91) winder (71) outside, the first locking mechanism include one first traction rope (72), slide laterally to be arranged and be present A fastening screw (73) on position frame (30) and be opened on link (40) and match with the fastening screw (73) one One end of dowel hole (74), first traction rope (72) is connected in the winder (71), and the other end is determined with described Position bolt (73) connects, which is laterally plugged in dowel hole (74) to limit seat frame (30) and link (40) relative rotation between, the first traction rope (72) can be wound on winding when arm-rest frame (70) is rotated around the first drive-connecting shaft (91) To pull out fastening screw (73) out of dowel hole (74) in portion (71).

2. a kind of lifting folding folding pushchair according to claim 1, it is characterised in that：The handle portion setting Articulated section in third connecting rod section (31) and/or link (40) and close to third connecting rod section (31) and link (40).

3. a kind of lifting folding folding pushchair according to claim 2, it is characterised in that：The seat frame (30) On be provided with a cover for seat, the handle portion is arranged on the cover for seat.

4. a kind of lifting folding folding pushchair according to claim 1, it is characterised in that：The third connecting rod section (31) and on both links (40) one there is a limiting section (32), which is resisted against on another in the two, Angle for limiting third connecting rod section (31) and link (40) towards the opposite direction rotation of rotation direction when being folded with it.

5. a kind of lifting folding folding pushchair according to claim 1, it is characterised in that：It further include a push-rod frame (60), which is hubbed on by one second drive-connecting shaft (92) on main car body, both push-rod frame (60) and main car body its Sliding is provided with the first locking piece (61) of a gear-like on one, it is another on be provided with and match with first locking piece (61) The first lock slots (62), first locking piece (61) is plugged in the first lock slots (62) to limit push-rod frame (60) phase One first drive component is provided in the rotation of the second drive-connecting shaft (92), push-rod frame (60) or main car body to main car body, is passed through First drive component can remove the first locking piece (61) out of the first lock slots (62).

6. a kind of lifting folding folding pushchair according to claim 1, it is characterised in that：It further include a back rest (80), which is hubbed on by a third drive-connecting shaft (93) on main car body, both back rest (80) and main car body its Sliding is provided with the second locking piece (81) of a gear-like on one, it is another on be provided with and match with second locking piece (81) The second lock slots (82), second locking piece (81) is plugged in the second lock slots (82) to limit back rest (80) phase One second drive component is provided in the rotation of third drive-connecting shaft (93), back rest (80) or main car body to main car body, is passed through Second drive component can remove the second locking piece (81) from the second lock slots (82).

7. a kind of lifting folding folding pushchair according to claim 6, it is characterised in that：The main car body leans on A double locking mechanism that can be unlocked is additionally provided in backrest (80), the double locking mechanism is for limiting the second drive component Action is to prevent the second drive component from removing the second locking piece (81) out of the second lock slots (82).