CN107380243B - Folding handcart easy to fold - Google Patents
Folding handcart easy to fold Download PDFInfo
- Publication number
- CN107380243B CN107380243B CN201710569083.XA CN201710569083A CN107380243B CN 107380243 B CN107380243 B CN 107380243B CN 201710569083 A CN201710569083 A CN 201710569083A CN 107380243 B CN107380243 B CN 107380243B
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- upper frame
- main
- pin hole
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- 238000003825 pressing Methods 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
- B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
- B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
- B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
- B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
- B62B7/064—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable the handle bar being parallel to the front leg
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Handcart (AREA)
Abstract
The invention discloses an easy-to-fold folding handcart, which comprises a foldable main body, wherein the main body comprises a front frame, a lower support frame and a rear frame, and the front frame comprises a front upper frame and a front lower frame which is arranged on the front upper frame and can slide and stretch along the front upper frame; the front end of the lower support frame is pivoted on the front lower frame through a first transverse pivot shaft, the rear end of the lower support frame is pivoted on the rear frame through a second transverse pivot shaft, and the upper end of the rear frame is pivoted on the front upper frame through a third transverse pivot shaft. When the trolley is unfolded, the front frame, the rear frame and the lower support frame can be enclosed into a triangle, so that the structural strength and the bearing capacity of the trolley can be effectively improved, the appearance is simpler and more attractive, and when the trolley is required to be folded, the front upper frame and the front lower frame can slide relatively to enable the main trolley body to form a crank-link mechanism, the folding action can be ensured to be stable, the resistance applied during folding is reduced, the structure is simple and reliable, and the trolley is not easy to damage.
Description
Technical Field
The present invention relates to a trolley.
Background
The handcart often supplies infant to go out to take and uses, and in order to conveniently carry and accomodate, most handcart can all make collapsible structure. The main body of the existing handcart is usually folded and folded by adopting multi-link structures such as four links, five links and the like, the structure is complex, the unfolding and folding operations are inconvenient, and the bearing capacity is poor.
Disclosure of Invention
In order to solve the above problems, the present invention aims to provide an easy-to-fold folding cart with a simple and firm structure.
The invention adopts the technical proposal for solving the technical problems that:
the foldable trolley comprises a foldable main trolley body, wherein the main trolley body comprises a front trolley frame, a lower support frame and a rear trolley frame, and the front trolley frame comprises a front upper trolley frame and a front lower trolley frame which is arranged on the front upper trolley frame and can slide and stretch along the front upper trolley frame; the front end of the lower support frame is pivoted on the front lower frame through a first transverse pivot shaft, the rear end of the lower support frame is pivoted on the rear frame through a second transverse pivot shaft, and the upper end of the rear frame is pivoted on the front upper frame through a third transverse pivot shaft.
Preferably, the main vehicle body is provided with an unlockable second locking device for maintaining the main vehicle body in the unfolded state.
Preferably, the second locking device comprises a second bolt and a second pin hole matched with the second bolt, the second bolt is transversely arranged on the front upper frame or the front lower frame in a sliding manner, the second pin hole is correspondingly arranged on the front lower frame or the front upper frame, and the second bolt is inserted in the second pin hole to limit the relative sliding of the front upper frame and the front lower frame so as to maintain the main vehicle body in an unfolding state; the main car body is provided with a first unlocking mechanism for driving the second bolt to move out of the second pin hole.
Preferably, the main vehicle body is pivoted with a front wheel frame through a fourth transverse pivot shaft, a front wheel is arranged on the front wheel frame, a fourth locking device for limiting the rotation of the front wheel frame relative to the main vehicle body around the fourth pivot shaft is arranged on the main vehicle body, and the fourth locking device can be unlocked by the folding action of the main vehicle body.
Preferably, the fourth locking device comprises a locking piece and a locking groove matched with the locking piece, the locking piece is transversely arranged on the main vehicle body or the front vehicle frame in a sliding manner, the locking groove is correspondingly arranged on the front vehicle frame or the main vehicle body, and the locking piece is inserted into the locking groove to limit the rotation of the front vehicle frame relative to the main vehicle body around a fourth pivot shaft; the locking piece is provided with a second guide part, the main car body is provided with an inclined second guide surface matched with the second guide part, and when the main car body is retracted, the second guide surface can be abutted with the second guide part and push the locking piece to move transversely to move out of the locking groove.
Preferably, the rear frame comprises a rear upper frame and a rear lower frame which is arranged on the rear upper frame and can slide and stretch along the rear upper frame, the upper end of the rear upper frame is pivoted on the front upper frame through the third pivot shaft, the rear end of the lower support frame is pivoted on the rear upper frame through the second pivot shaft, and a first locking device for maintaining the rear lower frame at an extending position relative to the rear upper frame is arranged on the main vehicle body; the folding action of the main car body can unlock the first locking device so that the rear lower frame can slide and retract along the rear upper frame.
Preferably, the first locking device comprises a first bolt and a first pin hole matched with the first bolt, the first bolt is transversely arranged on the rear upper frame or the rear lower frame in a sliding manner, the first pin hole is correspondingly arranged on the rear lower frame or the rear upper frame, and the first bolt is inserted in the first pin hole to limit the rear lower frame to slide along the rear upper frame so as to maintain the rear lower frame at the extending position; the folding action of the main car body can push the first bolt to move out of the first pin hole.
Preferably, the main vehicle body is further provided with a handrail frame, the handrail frame is arranged on the front upper frame and can slide and stretch along the front upper frame, and the main vehicle body is provided with a third locking device which is used for maintaining the handrail frame in an extending state and can be unlocked.
Preferably, the lower support frame is provided with an inclined first guide surface around the second pivot shaft, the first bolt is provided with a first guide part matched with the first guide surface, and the first guide part can be abutted with the first guide surface and slide along the first guide part to drive the first bolt to move transversely to move out of the first pin hole along with the rotation of the lower support frame and the rear upper frame around the second pivot shaft; the main car body is provided with a first elastic piece which is used for pressing the first bolt in the first pin hole and driving the first bolt to move back and reset after the first bolt moves out of the first pin hole.
Preferably, the rear upper frame and the rear lower frame are cylindrical, the rear lower frame is slidably inserted into the inner cavity of the rear lower frame, a first mounting hole matched with the first bolt is formed in the side wall of the rear lower frame, the first bolt is slidably inserted into the first mounting hole and is transversely slidably arranged on the rear lower frame, and the first elastic piece is arranged in the inner cavity of the rear lower frame.
The beneficial effects of the invention are as follows: when the trolley is unfolded, the front frame, the rear frame and the lower support frame can be enclosed into a triangle, so that the structural strength and the bearing capacity of the trolley can be effectively improved, the appearance is simpler and more attractive, and when the trolley is required to be folded, the front upper frame and the front lower frame can slide relatively to enable the main trolley body to form a crank-link mechanism, the folding action can be ensured to be stable, the resistance applied during folding is reduced, the structure is simple and reliable, and the trolley is not easy to damage.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is an exploded view of the armrest frame and the front upper bracket of the present invention;
FIG. 3 is an enlarged partial view of portion A of FIG. 2;
FIG. 4 is an exploded view of the top portion of the armrest frame of the present invention;
FIG. 5 is an exploded view of a support tube portion of the present invention;
FIG. 6 is a cross-sectional view of the present invention;
FIG. 7 is an enlarged partial view of portion B of FIG. 6;
FIG. 8 is an enlarged partial view of portion C of FIG. 6;
FIG. 9 is a partially exploded view of the present invention;
fig. 10 is a partial enlarged view of a portion D in fig. 9;
FIG. 11 is an enlarged partial view of portion E of FIG. 9;
FIG. 12 is a partially exploded view of the present invention from another perspective;
fig. 13 is a partial enlarged view of the portion F in fig. 12;
FIG. 14 is an exploded view of the front wheel frame and front lower frame attachment portion of the present invention;
FIG. 15 is an exploded view of the front wheel frame and front lower frame attachment portion of the present invention from another perspective;
FIG. 16 is a side view of the present invention in an expanded state;
FIG. 17 is a side view of the present invention in a semi-collapsed state;
fig. 18 is a side view of the present invention in a collapsed state.
Detailed Description
Referring to fig. 1 to 18, a folding cart comprises a collapsible main body, wherein the main body comprises a front frame 20, a lower support frame 30 and a rear frame 10, and the front frame 20 comprises a front upper frame 21 and a front lower frame 22 which is arranged on the front upper frame 21 and can slide and stretch along the front upper frame 21; the front end of the lower support frame 30 is pivotally mounted to the front lower frame 22 via a first pivot axis 101, the rear end is pivotally mounted to the rear frame 10 via a second pivot axis 102, and the upper end of the rear frame 10 is pivotally mounted to the front upper frame 21 via a third pivot axis 103. Like this, when this handcart is expanded, preceding frame 20, back frame 10 and lower carriage 30 can enclose into triangle-shaped, can effectively improve structural strength and bearing capacity of this handcart, and the appearance is succinct pleasing to the eye more yet, and when this handcart is closed to needs, preceding frame 21 and preceding lower carriage 22 can slide relatively and make the main automobile body form crank link mechanism, can guarantee to receive the stability of closing the action, reduces the resistance that receives when closing, simple structure is reliable, and is not fragile.
The main car body is provided with the second locking device which is used for maintaining the main car body in an unfolding state and can be unlocked, so that the main car body is prevented from being folded and folded by itself, and the use safety is ensured.
In the invention, the second locking device comprises a second bolt 71 and a second pin hole 72 matched with the second bolt 71, the second bolt 71 is transversely and slidably arranged on the front upper frame 21 or the front lower frame 22, the second pin hole 72 is correspondingly arranged on the front lower frame 22 or the front upper frame 21, and the second bolt 71 is inserted in the second pin hole 72 to limit the relative sliding of the front upper frame 21 and the front lower frame 22 so as to maintain the main vehicle body in an unfolding state; the main vehicle body is provided with a first unlocking mechanism for driving the second latch 71 to move out of the second pin hole 72. The invention has simple and reliable structure, can improve the structural strength and reliability, reduce the occurrence rate of faults and improve the safety performance. Of course, in practical applications, the second locking device may also use other common locking structures such as a common joint locking mechanism, and these locking structures are widely used in the field, and the structure and principle thereof are well known to those skilled in the art, and will not be described in detail herein.
The main body is pivoted with the front wheel frame 50 through a transverse fourth pivot shaft 104, in this embodiment, the front wheel frame 50 is pivoted on the front lower frame 22, the front wheel frame 50 is provided with the front wheel 51, the main body is provided with a fourth locking device for limiting the rotation of the front wheel frame 50 relative to the main body around the fourth pivot shaft 104, and the fourth locking device can be unlocked by the folding action of the main body, so that the front wheel frame 50 can be rotated to be close to the main body after the main body is folded, which is beneficial to further reducing the volume of the trolley after folding and convenient storage and carrying. In this embodiment, the fourth locking device includes a locking member 91 and a locking groove 92 adapted to the locking member 91, where the locking member 91 is disposed on the main vehicle body or the front vehicle frame 20 in a sliding manner, the locking groove 92 is correspondingly disposed on the front vehicle frame 20 or the main vehicle body, and the locking member 91 is inserted into the locking groove 92 to limit the rotation of the front vehicle frame 20 relative to the main vehicle body about the fourth pivot axis 104; the locking member 91 is provided with a second guiding portion 93, the main vehicle body is provided with an inclined second guiding surface 94 adapted to the second guiding portion 93, in this embodiment, the second guiding surface 94 is disposed on the lower supporting frame 30, when the main vehicle body is retracted, the second guiding surface 94 can abut against the second guiding portion 93 and push the locking member 91 to move laterally to move out of the locking groove 92, the structure is simple and reliable, and the processing, assembling and use are convenient, however, in practical application, the fourth locking device can also adopt other commonly used locking structures, and is not limited thereto. The second guiding part 93 can also be abutted against the positioning protruding block 96 on the front wheel frame 50 to limit the rotation angle of the front wheel frame 50 relative to the main vehicle body, so that the front wheel frame 50 can be positioned conveniently during the unfolding operation, and the operation and the use are convenient; the third reset spring 95 is also arranged between the locking piece 91 and the front lower bracket, so that the locking piece 91 can be prevented from loosening in use, the safety performance is improved, and the unfolding operation of the handcart is also facilitated.
In the invention, a rear frame 10 comprises a rear upper frame 11 and a rear lower frame 12 which is arranged on the rear upper frame 11 and can slide and stretch along the rear upper frame 11, wherein the upper end of the rear upper frame 11 is pivoted on a front upper frame 21 through a third pivot shaft 103, the rear end of a lower support frame 30 is pivoted on the rear upper frame 11 through a second pivot shaft 102, and a main vehicle body is provided with a first locking device for maintaining the rear lower frame 12 at an extending position relative to the rear upper frame 11; the folding action of the main body unlocks the first locking device so that the rear lower frame 12 can slide and retract along the rear upper frame 11. Because the rear frame 10 is telescopic, the volume of the handcart during folding can be reduced, the handcart is convenient to carry and store, and because the folding action of the main handcart body can automatically unlock the first locking device, the first locking device is not required to be unlocked manually, the folding operation of the handcart is effectively simplified, and the handcart is convenient to use.
In the invention, the first locking device comprises a first bolt 61 and a first pin hole 62 matched with the first bolt 61, the first bolt 61 is transversely arranged on the rear upper frame 11 or the rear lower frame 12 in a sliding manner, the corresponding first pin hole 62 is arranged on the rear lower frame 12 or the rear upper frame 11, and the first bolt 61 is inserted in the first pin hole 62 to limit the sliding of the rear lower frame 12 along the rear upper frame 11 so as to maintain the rear lower frame 12 in an extending position; the folding action of the main car body can push the first bolt 61 to move out of the first pin hole 62, so that the structure is simple and reliable, the processing and manufacturing are convenient, the rear lower frame 12 can be firmly fixed at the extending position, the release is difficult to occur under the action of external force, the bearing capacity of the handcart can be effectively improved, and the handcart is convenient to use. In this embodiment, the lower support frame 30 is provided with an inclined first guiding surface 63 surrounding the second pivot shaft 102, the first pin 61 is provided with a first guiding portion adapted to the first guiding surface 63, and along with the rotation of the lower support frame and the rear upper frame 11 around the second pivot shaft 102, the first guiding portion can abut against the first guiding surface 63 and slide along the first guiding portion to drive the first pin 61 to move laterally to move out from the first pin hole 62; the main body is provided with the first elastic piece 64 which is used for pressing the first bolt 61 in the first pin hole 62 and driving the first bolt 61 to move back and reset after the first bolt 61 moves out of the first pin hole 62, the first elastic piece 64 can enable the first locking device to be driven to unlock through sliding abutting of the first guide part and the first guide surface 63, the structure is simple and reliable, the processing and the assembly are convenient, the first elastic piece 64 can maintain the first bolt 61 in the first pin hole 62 when the main body is unfolded and used, the first bolt 61 is prevented from being separated due to offset when the main body is subjected to external force or vibration, the use safety of the main body is effectively ensured, on the other hand, when the rear frame 10 is stretched, the rear lower frame 12 is pulled out to a preset position relative to the rear upper frame 11, the first elastic piece 64 can automatically push the first bolt 61 into the first pin hole 62, so that the automatic locking of the rear frame 10 is not needed, the operation is convenient, the unfolding operation of the main body is convenient, the first bolt 61 can be used as a guide part in the practical middle part, and the first bolt 61 can be used as a middle part or a middle part of the main body, and the first bolt 61 is not arranged in the practical middle part or the first guide part; of course, in practical application, the first unlocking device can be driven to unlock by the folding action of the main vehicle body through other commonly used structures, for example, a wire spool can be arranged at a joint on the main vehicle body, a traction rope is coiled on the wire spool, the traction rope is connected with the first plug pin 61, the wire spool can rotate and can pull the first plug pin 61 to move by coiling and pulling the traction rope when the main vehicle body is folded, and a person skilled in the art can flexibly select other commonly used suitable structures according to practical needs without being limited thereto.
In this embodiment, the rear upper frame 11 and the rear lower frame 12 are both cylindrical, the rear lower frame 12 is slidably inserted into the inner cavity of the rear lower frame 12, the side wall of the rear lower frame 12 is provided with a first mounting hole 121 adapted to the first bolt 61, the first bolt 61 is slidably inserted into the first mounting hole 121 and is laterally slidably arranged on the rear lower frame 12, the first elastic member 64 is arranged in the inner cavity of the rear lower frame 12, the structure is simple and reliable, the processing and the assembly are convenient, the stability of the relative sliding of the rear upper frame 11 and the rear lower frame 12 can be ensured, the faults such as offset and loose are avoided, the structural strength of the handcart is improved, the first bolt 61 and the first elastic member 64 are hidden in the rear frame 10, the handcart is not easy to be damaged and fail due to collision, the reliability of the handcart is improved, the service life of the handcart is prolonged, and the appearance of the handcart is more regular and attractive. The first elastic member 64 in this embodiment adopts a V-shaped elastic sheet, which has a simple structure and is convenient to process and assemble, but in practical application, the first elastic member 64 may also adopt other common elastic structures such as a spring and a torsion spring, and is not limited thereto. In addition, in the present embodiment, since the first guide surface 63 can only push the head of the first pin 61 to be flush with the outer side wall of the rear lower frame 12, the head of the first pin 61 is made into a spherical shape, so that when the rear lower frame 12 and the rear upper frame 11 are pushed to slide and stretch relatively, the inner side wall of the first pin hole 62 can be slidably abutted with the head of the first pin 61 to drive the first pin 61 to move away from the first pin hole 62, and the structure is simple and easy to process and use.
In the invention, the main trolley body is also provided with the armrest frame 40, the armrest frame 40 is arranged on the front upper trolley frame 21 and can slide and stretch along the front upper trolley frame 21, and the main trolley body is provided with the third locking device which is used for maintaining the armrest frame 40 in the extending state and can be unlocked, so that the armrest frame 40 can be extended to enable the height of the trolley to be matched with the height of an adult during use, the trolley is convenient to use, and the armrest frame 40 can be retracted and folded during folding, thereby being beneficial to reducing the size of the trolley after folding and facilitating storage and carrying. In this embodiment, the front upper frame 21, the front lower frame 22 and the armrest frame 40 can be nested sequentially from outside to inside, and the volume of the trolley after being folded can be further reduced. In this embodiment, the third locking device includes a third bolt 81 disposed on the inside of the armrest frame 40, a third pin hole 82 disposed on the front upper frame 21, a second mounting hole 41 adapted to the third bolt 81 is formed on a side wall of the armrest frame 40, the third bolt 81 is simultaneously inserted into the second mounting hole 41 and the third pin hole 82 to limit sliding expansion of the armrest frame 40 relative to the front upper frame 21, a second elastic member 83 for pressing the third bolt 81 in the third pin hole 82 is disposed in the armrest frame 40, and in this embodiment, a common spring is selected for the second elastic member 83 to prevent the third bolt 81 from loosening from the third pin hole 82, so as to ensure use safety. The second unlocking mechanism is arranged on the armrest frame 40 and comprises a clamping elastic sheet 841, a pull rod 842, a second pull rope 85, a second guide column 862 and a second rotary drum 861, wherein the second bolt 71 is arranged on the clamping elastic sheet 841, one end of the clamping elastic sheet 841 is in an inclined plane shape, a guide surface 843 matched with the inclined plane end of the clamping elastic sheet 841 is arranged on the pull rod 842, the pull rod 842 is connected with the second guide column 862 through the second pull rope 85, the second guide column 862 is inserted into a third guide hole 863 on the armrest frame 40 and is arranged on the armrest frame 40 in a sliding manner, the second rotary drum 861 is rotatably arranged on the armrest frame 40, meanwhile, an inclined fourth guide hole 864 matched with the second guide column 862 is arranged on the second rotary drum 861, when the second rotary drum 861 rotates, the second guide column 862 can be driven to move along the third guide hole 3 through the fourth guide hole 864, the second guide column 843 is pulled to move through the second guide hole 8685, the pull rod 843 is pulled through the third guide hole 842, and the reset pin is conveniently arranged between the second pull rod 842 and the armrest frame 40, and the reset pin is conveniently arranged between the second pull rod 842 and the third guide column 842.
In the invention, the bottom end of the rear lower frame 12 is provided with the rear wheel 13, the bottom of the rear lower frame 12 is also provided with the transverse rear connecting frame 14, the rear connecting frame 14 can be provided with the brake pedal 141 for controlling the brake device matched with the rear wheel 13, when the handcart is unfolded, the rear connecting frame 14 or the brake pedal 141 can be stepped on by feet, and then the unfolding operation of the handcart can be conveniently and rapidly finished by pulling the armrest frame 40 upwards, so that the handcart is effectively and conveniently used.
The foregoing is only a preferred embodiment of the present invention, and all technical solutions for achieving the object of the present invention by substantially the same means are within the scope of the present invention.
Claims (8)
1. The utility model provides an easily receive folding handcart, includes collapsible main automobile body, its characterized in that: the main vehicle body comprises a front vehicle frame (20), a lower supporting frame (30) and a rear vehicle frame (10), wherein the front vehicle frame (20) comprises a front upper vehicle frame (21) and a front lower vehicle frame (22) which is arranged on the front upper vehicle frame (21) and can slide and stretch along the front upper vehicle frame (21); the front end of the lower support frame (30) is pivoted on the front lower frame (22) through a transverse first pivot shaft (101), the rear end of the lower support frame is pivoted on the rear frame (10) through a transverse second pivot shaft (102), and the upper end of the rear frame (10) is pivoted on the front upper frame (21) through a transverse third pivot shaft (103);
the main vehicle body is pivoted with a front wheel frame (50) through a transverse fourth pivot shaft (104), a front wheel (51) is arranged on the front wheel frame (50), a fourth locking device for limiting the rotation of the front wheel frame (50) relative to the main vehicle body around the fourth pivot shaft (104) is arranged on the main vehicle body, and the fourth locking device can be unlocked by the folding action of the main vehicle body;
the fourth locking device comprises a locking piece (91) and a locking groove (92) matched with the locking piece (91), the locking piece (91) is transversely arranged on the main vehicle body or the front vehicle frame (20) in a sliding mode, the locking groove (92) is correspondingly arranged on the front vehicle frame (20) or the main vehicle body, and the locking piece (91) is inserted into the locking groove (92) to limit the rotation of the front vehicle frame (20) relative to the main vehicle body around a fourth pivot shaft (104); the locking piece (91) is provided with a second guide part (93), the main car body is provided with an inclined second guide surface (94) matched with the second guide part (93), and when the main car body is folded, the second guide surface (94) can be abutted with the second guide part (93) and push the locking piece (91) to move transversely to move out of the locking groove (92).
2. A collapsible folding cart as defined in claim 1, wherein: the main car body is provided with an unlocked second locking device for maintaining the main car body in an unfolded state.
3. A collapsible folding cart as defined in claim 2, wherein: the second locking device comprises a second bolt (71) and a second pin hole (72) matched with the second bolt (71), the second bolt (71) is transversely arranged on the front upper frame (21) or the front lower frame (22) in a sliding manner, the second pin hole (72) is correspondingly arranged on the front lower frame (22) or the front upper frame (21), and the second bolt (71) is inserted in the second pin hole (72) to limit the relative sliding of the front upper frame (21) and the front lower frame (22) so as to maintain the main vehicle body in an unfolding state; the main car body is provided with a first unlocking mechanism for driving the second bolt (71) to move out of the second pin hole (72).
4. A collapsible folding cart as defined in claim 1, wherein: the rear frame (10) comprises a rear upper frame (11) and a rear lower frame (12) which is arranged on the rear upper frame (11) and can slide and stretch along the rear upper frame (11), the upper end of the rear upper frame (11) is pivoted on the front upper frame (21) through the third pivot shaft (103), the rear end of the lower support frame (30) is pivoted on the rear upper frame (11) through the second pivot shaft (102), and a first locking device for maintaining the rear lower frame (12) at an extending position relative to the rear upper frame (11) is arranged on the main vehicle body; the folding action of the main car body can unlock the first locking device so that the rear lower frame (12) can slide and retract along the rear upper frame (11).
5. The collapsible folding cart of claim 4, wherein: the first locking device comprises a first bolt (61) and a first pin hole (62) matched with the first bolt (61), the first bolt (61) is transversely arranged on the rear upper frame (11) or the rear lower frame (12) in a sliding manner, the first pin hole (62) is correspondingly arranged on the rear lower frame (12) or the rear upper frame (11), and the first bolt (61) is inserted in the first pin hole (62) to limit the rear lower frame (12) to slide along the rear upper frame (11) so as to maintain the rear lower frame (12) at an extending position; the folding action of the main car body can push the first bolt (61) to move out of the first pin hole (62).
6. The collapsible folding cart of claim 5, wherein: the main car body is also provided with a handrail frame (40), the handrail frame (40) is arranged on the front upper frame (21) and can slide and stretch along the front upper frame (21), and the main car body is provided with a third locking device which is used for maintaining the handrail frame (40) in an extending state and can be unlocked.
7. The collapsible folding cart of claim 5, wherein: the lower support frame (30) is provided with an inclined first guide surface (63) around the second pivot shaft (102), the first bolt (61) is provided with a first guide part matched with the first guide surface (63), and along with the rotation of the lower support frame and the rear upper frame (11) around the second pivot shaft (102), the first guide part can be abutted with the first guide surface (63) and slide along the first guide part to drive the first bolt (61) to move transversely to move out of the first pin hole (62); the main car body is provided with a first elastic piece (64) which is used for pressing the first bolt (61) in the first pin hole (62) and driving the first bolt (61) to move back and reset after the first bolt (61) moves out of the first pin hole (62).
8. The collapsible folding cart of claim 7, wherein: the rear upper frame (11) and the rear lower frame (12) are cylindrical, the rear lower frame (12) is slidably inserted into the inner cavity of the rear lower frame (12), a first mounting hole (121) matched with the first bolt (61) is formed in the side wall of the rear lower frame (12), the first bolt (61) is slidably inserted into the first mounting hole (121) and is transversely slidably arranged on the rear lower frame (12), and the first elastic piece (64) is arranged in the inner cavity of the rear lower frame (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710569083.XA CN107380243B (en) | 2017-07-13 | 2017-07-13 | Folding handcart easy to fold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710569083.XA CN107380243B (en) | 2017-07-13 | 2017-07-13 | Folding handcart easy to fold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107380243A CN107380243A (en) | 2017-11-24 |
| CN107380243B true CN107380243B (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710569083.XA Active CN107380243B (en) | 2017-07-13 | 2017-07-13 | Folding handcart easy to fold |
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| CN (1) | CN107380243B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN115320693A (en) * | 2022-08-19 | 2022-11-11 | 广东乐美达集团有限公司 | Adjustable track frame for children's cycle |
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| CN107380243A (en) | 2017-11-24 |
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