CN108820027B

CN108820027B - Handcart with seat frame reversing function

Info

Publication number: CN108820027B
Application number: CN201810806444.2A
Authority: CN
Inventors: 杨鹏耀
Original assignee: Dongguan Hengyao Daily Necessities Co ltd
Current assignee: Dongguan Hengyao Daily Necessities Co ltd
Priority date: 2018-07-18
Filing date: 2018-07-18
Publication date: 2023-12-05
Anticipated expiration: 2038-07-18
Also published as: CN108820027A

Abstract

The invention relates to the technical field of trolleys, and particularly discloses a trolley with a seat frame reversing function, which comprises a folding frame, a folding seat frame and reversing joints, wherein the folding frame is arranged on the folding frame; the folding frame is connected to the first joint, and the folding seat frame is connected to the joint body; the first joint and the joint body are respectively provided with a first stop block and a second stop block, and the second stop blocks respectively abut against two sides of the first stop block before and after the direction change of the folding seat frame; when the folding seat frame is folded forward, the folding frame is unlocked, and at the moment, the folding frame is folded together with the first stop block to rotate, and the first stop block is linked with the second stop block to realize folding and folding of the folding seat frame; when the folding seat frame is reversely retracted, the folding seat frame is unlocked, the folding seat frame is folded and retracted within the travel range of the underframe of the folding seat frame, and the folding seat frame is abutted against the folding seat frame to complete folding and retracting of the folding seat frame in the folding process of the folding seat frame; folding seat frame trades handcart around only needs the folding frame of unblock can accomplish the folding receipts car of whole car, promotes the folding efficiency of handcart.

Description

Handcart with seat frame reversing function

Technical Field

The invention relates to the technical field of trolleys, and particularly discloses a trolley with a seat frame reversing function.

Background

The handcart is one of the usual travel tools that the infant goes out in area, and infant seat portion is all installed to the handcart, in the use of handcart, often need according to infant's state (when infant sleeps or infant wakes) the relative position of relative handcart skeleton of seat portion, need carry out the switching-over operation to seat portion promptly, in order to promote the performance of handcart, the handcart of being convenient for deposits, handcart among the prior art mostly has folding function, but the structure of handcart among the prior art is complicated, folding receipts car complex operation around the seat portion switching-over, waste time and energy, use extremely inconveniently.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the handcart with the seat frame reversing function, the folding and folding of the whole handcart can be completed only by unlocking the folding frame when the folding seat frame is replaced with the front handcart and the rear handcart, the operation through other extra steps is not needed, the operation is simple, the use is convenient, and the folding efficiency of the handcart is greatly improved.

In order to achieve the above purpose, the handcart with the seat frame reversing function comprises a folding frame, a folding seat frame and reversing joints, wherein the folding frame and the folding seat frame are detachably connected through the reversing joints; the reversing joint comprises a first joint and a second joint detachably connected with the first joint, wherein the first joint is provided with a first chute, a guide bar protruding into the first chute and a locking groove concavely arranged from the bottom wall of the first chute; the second joint comprises a joint body, a locking block, a snap fastener, a first elastic piece and a second elastic piece, wherein the joint body is provided with a protruding plate and a rib connected with the protruding plate, the protruding plate is slidingly accommodated in the first chute, and the rib is positioned between the guide bar and the bottom wall of the first chute; the locking block is movably arranged on the joint body, and the first elastic piece is used for driving the locking block to protrude into the locking groove; the snap fastener is movably arranged on the joint body, the second elastic piece is used for driving the snap fastener to reset, and the snap fastener is used for driving the locking piece to withdraw from the locking groove; the folding frame is used for being connected to the first joint, and the folding seat frame is used for being connected to the joint body; the first joint is provided with a first stop block, the joint body is provided with a second stop block, and the second stop blocks respectively abut against the left side and the right side of the first stop block before and after the direction change of the folding seat frame.

Preferably, the folding frame comprises a third joint, a fourth joint, a shaft body, a push frame, a first support, a second support and a bottom frame, one ends of the first joint, the third joint and the fourth joint are rotatably arranged through the shaft body, one end of the first support is arranged on the third joint, the other end of the first support is rotatably arranged at one end of the bottom frame, one end of the second support is rotatably arranged at the other end of the fourth joint, the other end of the second support is rotatably arranged at the other end of the bottom frame, and one end of the push frame is arranged at the fourth joint; one end of the second bracket is provided with a pit, the fourth joint is provided with a movable lock column and a third elastic piece for driving the lock column to protrude into the pit, and the other end of the hand pushing frame is provided with an unlocking mechanism for driving the lock column to withdraw from the pit.

Preferably, the folding frame further comprises a fixed block arranged at one end of the fourth joint or the hand pushing frame, the lock column is arranged on the fixed block in a sliding manner, the third elastic piece is a spring, two ends of the third elastic piece respectively prop against the fixed block and the lock column, and the other end of the lock column protrudes into the pit; the unlocking mechanism comprises a wire drawing and a driving assembly arranged at the other end of the hand pushing frame, the driving assembly drives the lock column to be close to the fixed block through the wire drawing so that the other end of the lock column withdraws from the pit, and the third elastic piece is used for driving the lock column to protrude into the pit.

Preferably, the drive assembly comprises a drive plate, a blocking buckle, a fourth elastic piece and a guide pin, wherein the drive plate, the blocking buckle and the guide pin are all arranged at the other end of the hand push frame in a sliding mode, the fourth elastic piece drives the blocking buckle to abut against the drive plate so that the drive plate is fixed at the other end of the hand push frame, the sliding direction of the drive plate and the sliding direction of the guide pin are crossed, the drive plate is provided with a guide groove, the guide pin protrudes into the guide groove, the side wall of the guide groove abuts against the guide pin, one end of the wire drawing, far away from the lock column, is connected with the guide pin, the guide pin is driven by the sliding drive plate to move along with the wire drawing, and the moving wire drawing pulls the lock column to withdraw from the pit.

Preferably, the fourth joint comprises a strip body, a first disc part arranged at one end of the strip body, and two second disc parts arranged at the other end of the strip body, wherein the two second disc parts are spaced and arranged in parallel, one end of the hand pushing frame is arranged on the strip body, one end of the second bracket is rotatably arranged at the first disc part, the third joint is positioned between the two second disc parts, one side of the third joint is provided with an arc blind groove penetrating through one second disc part, the first joint is provided with a fixture block protruding into the arc blind groove, and the side walls at two ends of the arc blind groove are respectively used for abutting against the fixture block; the fourth joint is provided with a limit post connected with the two second disc parts, the third joint is provided with an arc-shaped penetrating groove penetrating through the third joint, the limit post is positioned in the arc-shaped penetrating groove, and side walls at two ends of the arc-shaped penetrating groove are respectively used for abutting against the limit post.

Preferably, the folding seat frame comprises a seat rest frame, a pedal frame, an armrest frame and a sunshade, wherein the seat rest frame is detachably connected to the joint body, the pedal frame and the armrest frame are both rotatably arranged at one end of the seat rest frame, the sunshade is rotatably arranged at the other end of the seat rest frame, and the pedal frame and the seat rest frame are arranged in a coplanar manner.

Preferably, the second joint further comprises a base, the base is detachably connected with the joint, the joint is located between the base and the first joint, the folding seat frame is detachably connected with the base, the locking block is slidably arranged between the base and the joint, one end of the locking block penetrates through the joint and protrudes into the locking groove, and the sliding direction of the locking block is crossed with the sliding direction of the protruding plate.

Preferably, the joint body is provided with a second chute, the second chute is concavely formed from one side, close to the seat body, of the joint body, the snap fastener comprises a pressing part and a driving part connected with the pressing part, the driving part is slidingly accommodated in the second chute, the pressing part protrudes out of the joint body, and the driving part is used for abutting against the locking block.

Preferably, the joint body is provided with two guide plates positioned in the second sliding groove, the joint body is provided with a through hole penetrating through the joint body, the through hole is positioned between the two guide plates, the locking block is arranged between the two guide plates in a sliding mode, and one end of the locking block protrudes into the locking groove through the through hole.

Preferably, the driving part is provided with a guide hole penetrating through the driving part, the two guide plates are located in the guide hole, two ends of the first elastic piece respectively abut against the other ends of the base body and the locking piece, and two ends of the second elastic piece respectively abut against the locking piece and the pressing part.

The invention has the beneficial effects that: when the folding seat frame is folded forward, the folding frame is unlocked, and at the moment, the folding frame is folded together with the first stop block to rotate, and the first stop block is linked with the second stop block to realize folding and folding of the folding seat frame; when the folding seat frame is reversely retracted, the folding seat frame is unlocked, the folding seat frame is folded and retracted within the travel range of the underframe of the folding seat frame, and the folding seat frame is abutted against the folding seat frame to complete folding and retracting of the folding seat frame in the folding process of the folding seat frame; folding seat frame trades handcart around only needs the folding frame of unblock can accomplish the folding receipts car of whole car, promotes the folding efficiency of handcart.

Drawings

FIG. 1 is a schematic perspective view of a folded seat frame of the present invention in a front-to-back orientation;

FIG. 2 is a schematic perspective view of the folded carrier of the present invention after being looped;

FIG. 3 is a schematic perspective view of a reversing joint according to the present invention;

FIG. 4 is a schematic exploded view of the reversing joint of the present invention;

FIG. 5 is a schematic perspective view of the first joint, the third joint, the fourth joint, the fixing block, the third elastic member and the lock cylinder according to the present invention;

FIG. 6 is a schematic perspective view of a joint body according to the present invention;

FIG. 7 is a schematic perspective view of a fourth joint, a second bracket, a hand rest and an unlocking mechanism according to the present invention;

FIG. 8 is a schematic view of a part of the enlarged structure of the portion A in FIG. 7;

FIG. 9 is a schematic view of a part of the enlarged structure of the portion B in FIG. 7;

FIG. 10 is a schematic perspective view of a lock block according to the present invention;

fig. 11 is a schematic exploded view of another view of the knuckle of the present invention.

The reference numerals include:

1-folding frame 2-folding seat frame 3-reversing joint

4-first joint 5-second joint 6-first chute

7-guide bar 8-locking groove 9-joint body

11-locking piece 12-snap fastener 13-first elastic member

14-second elastic member 15-protruding plate 16-rib

17-third joint 18-fourth joint 19-shaft body

21-hand-push frame 22-first support 23-second support

24-underframe 25-pit 26-lock cylinder

27-third elastic piece 28-unlocking mechanism 29-fixed block

31-wire drawing 32-driving assembly 33-driving plate

34-catch 35-fourth elastic member 36-guide pin

37-guide groove 38-strip 39-first disk portion

41-second disc portion 42-arc blind groove 43-clamping block

44-limit post 45-arc through groove 46-seat rest

47-pedal 48-armrest 49-awning

51-seat 52-second chute 53-pressing portion

54-drive section 55-guide plate 56-through hole

57-guide hole 58-rod 59-first guide slope

61-second guiding inclined plane 62-relief hole 63-first stop

64-second stop 65-guide rib 66-guide groove

67-boss 68-accommodating groove 69-first limiting block

71-a second limiting block.

Detailed Description

The present invention will be further described with reference to examples and drawings, which are not intended to be limiting, for the understanding of those skilled in the art.

Referring to fig. 1 to 6, a cart with a seat frame reversing function of the present invention includes a foldable frame 1, a foldable seat frame 2, and a reversing joint 3, wherein the foldable frame 1 and the foldable seat frame 2 are detachably connected together through the reversing joint 3; the reversing joint 3 comprises a first joint 4 and a second joint 5 which is detachably connected with the first joint 4, wherein the first joint 4 is provided with a first chute 6, a guide bar 7 which protrudes into the first chute 6 and a locking groove 8 which is positioned in the first chute 6, the guide bar 7 and the bottom wall of the first chute 6 are arranged at intervals and in parallel, and the locking groove 8 is concavely arranged from the bottom wall of the first chute 6; the second joint 5 comprises a joint body 9, a locking block 11, a snap fastener 12, a first elastic piece 13 and a second elastic piece 14, wherein the joint body 9 is provided with a protruding plate 15 and a rib 16 connected with the protruding plate 15, the joint body 9, the protruding plate 15 and the rib 16 are of an integrated structure, the protruding plate 15 is protruding from the outer surface of the joint body 9, the rib 16 is protruding from the outer surface of the protruding plate 15, the rib 16 and the joint body 9 are arranged at intervals and in parallel, the protruding plate 15 is slidingly accommodated in the first sliding groove 6, the rib 16 is positioned between the guide bar 7 and the bottom wall of the first sliding groove 6, and the guide bar 7 is positioned between the rib 16 and the joint body 9; the locking block 11 is movably arranged on the joint body 9, and the first elastic piece 13 is used for driving the locking block 11 to protrude into the locking groove 8; the snap fastener 12 is movably arranged on the joint body 9, the second elastic piece 14 is used for driving the snap fastener 12 to reset, and the snap fastener 12 is used for driving the locking piece 11 to withdraw from the locking groove 8; the folding chassis 1 is intended to be connected to a first joint 4 and the folding chassis 2 is intended to be connected to a joint body 9.

The first joint 4 is provided with a first stop block 63 exposed in the first chute 6, the joint body 9 is provided with a second stop block 64 for abutting against the first stop block 63, and the second stop blocks 64 of the second joint 5 before and after the steering are respectively abutted against the left side and the right side of the first stop block 63; when the folded seat frame 2 is assembled with the first joint 4 with the second joint 5 being shifted forward, the second stopper 64 abuts on the left side of the first stopper 63; when the second joint 5 after the folded seat frame 2 has been shifted is assembled with the first joint 4, the second stop 64 abuts on the right side of the first stop 63. The first stop 63 and the second stop 64 are used for realizing the locking limit between the first joint 4 and the second joint 5.

When the folding seat frame 2 needs to be reversed, a user presses the snap fastener 12 by hand, so that the snap fastener 12 moves relative to the joint body 9, the moved snap fastener 12 drives the locking piece 11 to withdraw from the locking groove 8, then the second joint 5 and the folding seat frame 2 can be withdrawn from the first sliding groove 6, the first joint 4 and the second joint 5 are separated from each other and separated, then the direction of the folding seat frame 2 is changed, then the second joint 5 and the folding seat frame 2 are reinserted into the first sliding groove 6, the second elastic piece 14 drives the snap fastener 12 to reset, and the first elastic piece 13 drives the locking piece 11 to protrude into the locking groove 8 again, so that the second joint 5 is locked on the first joint 4, and the folding seat frame 1 and the folding seat frame 2 are connected together; the rapid steering of the folding seat frame 2 is realized, and the service performance of the handcart is improved.

When the folding seat frame 2 is folded forward, the folding frame 1 is unlocked, and at the moment, the folding frame 1 rotates together with the first stop block 63, and the folding seat frame 2 is folded by means of mutual collision of the first stop block 62 and the second stop block 64, and the first stop block 62 and the second stop block 64 are linked; when the folding seat frame 2 is reversely folded, the folding seat frame 1 is unlocked, the folding seat frame 2 is folded and folded to be within the travel range of the underframe of the folding seat frame 1, and in the folding process of the folding seat frame 1, the folding seat frame 2 is abutted against the folding seat frame 2 through the underframe of the folding seat frame 1 to finish folding and folding the vehicle; the folding seat frame 2 is replaced by a front handcart and a rear handcart, the folding and collecting of the whole handcart can be completed only by unlocking the folding frame 1, the operation through other extra steps is not needed, the operation is simple, the use is convenient, and the folding efficiency of the handcart is improved.

The folding bicycle frame 1 comprises a third joint 17, a fourth joint 18, a shaft body 19, a push frame 21, a first support 22, a second support 23 and a bottom frame 24, wherein the third joint 17 is approximately a round flat plate, one ends of the first joint 4, the third joint 17 and the fourth joint 18 are rotatably arranged through the shaft body 19, one end of the first support 22 is arranged on the third joint 17, the other end of the first support 22 is rotatably arranged on one end of the bottom frame 24, one end of the second support 23 is rotatably arranged on the other end of the fourth joint 18, the other end of the second support 23 is rotatably arranged on the other end of the bottom frame 24, and one end of the push frame 21 is arranged on the fourth joint 18; in this embodiment, the lower end of the chassis 24 is provided with at least three rotating rollers (not numbered in the figure), the connecting lines of the at least three rollers are triangular, so that a user can conveniently hold the push frame 21 to push the cart to move, one end of the second support 23 is provided with a pit 25, the pit 25 is concavely formed from the outer surface of the second support 23, the fourth joint 18 is provided with a movable lock column 26 and a third elastic member 27 for driving the lock column 26 to protrude into the pit 25, the side wall of the pit 25 abuts against the lock column 26, so that the fourth joint 18 cannot rotate relative to the second support 23, the cart cannot be folded, in this embodiment, the fourth joint 18 and the lock column 26 are slidably arranged, the other end of the push frame 21 is provided with an unlocking mechanism 28 for driving the lock column 26 to withdraw from the pit 25, and the third elastic member 27 is used for driving the lock column 26 to protrude into the pit 25.

When the folding seat frame 2 is forward, the folding frame 1 is unlocked, and the joint body 9 is linked with the hand pushing frame 21, so that folding and folding of the trolley are realized; when the folding seat frame 2 is reversed, the folding frame 1 is unlocked, the joint body 9 is not linked with the hand pushing frame 21, the joint body 9 is folded into the travel range of the bottom frame 24 through the first joint 4, the bottom frame 24 abuts against the seat rest 46 connected with the joint body 9, and the seat rest 46 is folded by folding of the bottom frame 24, so that folding of the handcart is completed.

When the trolley needs to be folded, a user triggers the unlocking mechanism 28 to enable the lock column 26 to withdraw from the pit 25, then the fourth joint 18 and the second support 23 rotate relatively, the second support 23 and the underframe 24 rotate relatively, the first support 22 and the fourth joint 18 rotate relatively, and the first support 22 and the underframe 24 rotate relatively until the whole folding trolley frame 1 is folded, and the folding trolley frame 1 and the folding seat frame 2 are folded together in the folding process of the folding trolley frame 1 until the whole folding and folding of the trolley is completed.

Referring to fig. 1 to 9, the folding bicycle frame 1 further includes a fixing block 29 mounted on the fourth joint 18 or on one end of the hand pushing frame 21, in this embodiment, the hand pushing frame 21 is hollow and tubular, the fixing block 29 is mounted in the hand pushing frame 21, the lock column 26 is accommodated in the hand pushing frame 21, the lock column 26 is slidably disposed on the fixing block 29, the third elastic member 27 is a spring, two ends of the third elastic member 27 respectively abut against the fixing block 29 and the lock column 26, the third elastic member 27 is located between the fixing block 29 and the lock column 26, and the other end of the lock column 26 protrudes into the pit 25; the unlocking mechanism 28 comprises a wire drawing 31 and a driving component 32 arranged on the other end of the hand pushing frame 21, and the driving component 32 drives the lock cylinder 26 to move towards the direction close to the fixed block 29 through the wire drawing 31 so that the other end of the lock cylinder 26 withdraws from the pit 25.

In actual use, the user drives the wire drawing 31 to move by using the driving component 32, the moving wire drawing 31 pulls the lock column 26 to move towards the direction close to the fixed block 29, and meanwhile, the third elastic piece 27 positioned between the fixed block 29 and the lock column 26 is compressed until the other end of the lock column 26 is pushed out from the pit 25, and then the handcart can be folded. In this embodiment, the fourth joint 18 is provided with a first limiting block 69, the second bracket 23 is provided with a second limiting block 71, the pit 25 is concavely arranged in the second limiting block 71 from the outer surface of the second bracket 23, when the lock post 26 protrudes into the pit 25, the outer surface of one end of the first limiting block 69 is abutted against the outer surface of one end of the second limiting block 71, so as to avoid twisting the lock post 26 due to excessive rotation of the second bracket 23 and the fourth joint 18; when the folding of the trolley is completed, the outer surface of the other end of the first limiting block 69 abuts against the outer surface of the other end of the second limiting block 71, so that the excessive rotation of the second bracket 23 and the fourth joint 18 is avoided, and the folding efficiency and the folding yield of the trolley are improved.

The driving assembly 32 includes a driving plate 33, a blocking buckle 34, a fourth elastic member 35 and a guide pin 36, where the driving plate 33, the blocking buckle 34 and the guide pin 36 are all slidably disposed on the other end of the push frame 21, the fourth elastic member 35 drives the blocking buckle 34 to abut against the driving plate 33 so that the driving plate 33 is fixed on the other end of the push frame 21, the fourth elastic member 35 is a spring, two ends of the fourth elastic member 35 abut against the blocking buckle 34 and the other end of the push frame 21 respectively, the sliding direction of the driving plate 33 is crossed with the sliding direction of the guide pin 36, in this embodiment, the sliding direction of the guide pin 36 is parallel to the sliding direction of the blocking buckle 34, the sliding direction of the driving plate 33 is perpendicular to the sliding direction of the blocking buckle 34, a guide slot 37 is disposed on the driving plate 33, the length direction of the guide slot 37 is crossed with the sliding direction of the guide pin 36, the guide pin 36 protrudes into the guide slot 37, the side wall of the guide slot 37 abuts against the guide pin 36, one end of the wire 31 far from the lock post 26 is connected to the other end of the guide pin 36, the wire 31 exits from the guide pin 31 to the guide pin 31, and the lock post 31 is moved from the pit 25.

When the trolley is required to be folded, the sliding blocking buckle 34 enables the blocking buckle 34 not to collide with the driving plate 33 any more, at this time, the fourth elastic piece 35 is compressed, then a user presses the driving plate 33 to enable the driving plate 33 to slide relative to the hand pushing frame 21, since the side wall of the guiding groove 37 collides with the guiding pin 36, the guiding pin 36 can be driven to slide relative to the hand pushing frame 21 when the driving plate 33 slides, the guiding pin 36 can be moved along with the wire drawing 31 when the guiding pin 36 slides, the connecting lock column 26 moves towards the direction close to the fixed block 29 when the wire drawing 31 moves, the third elastic piece 27 is compressed, the lock column 26 moves towards the direction close to the fixed block 29 and can withdraw from the pit 25, and then the trolley can be folded. After the handcart is re-unfolded, the third elastic element 27 drives the lock column 26 to reversely move and protrude into the pit 25 again, the lock column 26 drives the driving plate 33 to reset through the wire drawing 31 and the guide pin 36, and the fourth elastic element 35 drives the blocking buckle 34 to reset, and the blocking buckle 34 after reset abuts against the driving plate 33, so that the driving plate 33 is prevented from being touched carelessly to drive the lock column 26 to withdraw from the pit 25, and the safety of the handcart in use is improved.

The fourth joint 18 includes a strip body 38, a first disc portion 39 disposed at one end of the strip body 38, two second disc portions 41 disposed at the other end of the strip body 38, the two second disc portions 41 have the same structure, the two second disc portions 41 are spaced apart from each other and disposed in parallel, one end of the hand push frame 21 is disposed on the strip body 38, preferably, one end of the hand push frame 21 penetrates the strip body 38 and protrudes into the first disc portion 39, one end of the second support 23 is rotatably disposed on the first disc portion 39, one end of the second support 23 is rotatably disposed with the first disc portion 39 via a pivot, the third joint 17 is disposed between the two second disc portions 41, one side of the third joint 17 is disposed with an arc blind groove 42 penetrating through one second disc portion 41, the first joint 4 is disposed with a fixture block 43 protruding into the arc blind groove 42, and sidewalls at two ends of the arc blind groove 42 are respectively used for abutting the fixture block 43; when one end of the clamping block 43 abuts against the side wall of one end of the arc-shaped blind groove 42, the folding seat frame 2 is in the unfolding position; when the other end of the clamping block 43 abuts against the side wall of the other end of the arc-shaped blind groove 42, the folding seat frame 2 is in the folding position; the fourth joint 18 is provided with a limit post 44 connected with the two second disc parts 41, the limit post 44 penetrates through the third joint 17, the third joint 17 is provided with an arc-shaped penetrating groove 45 penetrating through the third joint 17, the limit post 44 is positioned in the arc-shaped penetrating groove 45, and side walls at two ends of the arc-shaped penetrating groove 45 are respectively used for abutting against the limit post 44; when the limit post 44 abuts against the side wall of one end of the arc-shaped through groove 45, the pedal frame 47 is in an extended state; when the limit post 44 abuts against the side wall of the other end of the arc-shaped through groove 45, the pedal frame 47 is in a folded state.

The folding seat frame 2 comprises a seat rest 46, a pedal 47, an armrest 48 and a sunshade 49, wherein the seat rest 46 is detachably connected to the joint body 9, the folding seat frame 2 is connected to the reversing joint 3 through the seat rest 46, the pedal 47 and the armrest 48 are both rotatably arranged at one end of the seat rest 46, the sunshade 49 is rotatably arranged at the other end of the seat rest 46, and the pedal 47 and the seat rest 46 are arranged in a coplanar manner. In actual use, a child sits on the area formed by the seat frame 46, places his feet on the foot rest frame 47, and holds the armrest frame 48 by his hands, and the awning cloth mounted on the awning 49 can block strong sunlight.

The second joint 5 further comprises a seat body 51, the seat body 51 is detachably connected with the joint body 9, the joint body 9 is located between the seat body 51 and the first joint 4, the folding seat frame 2 is detachably connected to the seat body 51, the locking block 11 is slidably arranged between the seat body 51 and the joint body 9, one end of the locking block 11 penetrates through the joint body 9 and protrudes into the locking groove 8, and the sliding direction of the locking block 11 is crossed with the sliding direction of the protruding plate 15.

When a user presses the snap fastener 12, the snap fastener 12 moves relative to the joint body 9, at this time, the second elastic member 14 is elastically deformed, the moved snap fastener 12 drives the locking piece 11 to move, so that the locking piece 11 withdraws from the locking groove 8, the first elastic member 13 is elastically deformed when the locking piece 11 withdraws from the locking groove 8, then the protruding plate 15 of the second joint 5 can withdraw from the first sliding groove 6 of the first joint 4, separation of the first joint 4 and the second joint 5 is realized, and the folding seat frame 2 can be separated from the folding seat frame 1 after the second joint 5 is separated from the first joint 4 due to the fact that the folding seat frame 2 is mounted on the seat frame 51 of the second joint 5. Then the user changes the direction of the folding seat frame 2 back and forth, after the folding seat frame 2 is reversed, the second joint 5 with the folding seat frame 2 is reinserted into the first chute 6, the second elastic piece 14 drives the snap fastener 12 to reset under the action of elastic force, and the preparation is made for the reversing of the next folding seat frame 2; simultaneously, the first elastic piece 13 drives the locking piece 11 to reset so that the locking piece 11 protrudes into the locking groove 8 again, and the first joint 4 and the second joint 5 are clamped together by utilizing the cooperation of the locking piece 11 and the locking groove 8; further, the folding seat frame 2 and the folding bicycle frame 1 are connected and fixed together through the reversing joint 3, preferably, the locking groove 8 is a blind groove, that is, the locking groove 8 does not penetrate through the first joint 4, the bottom wall of the locking groove 8 is used for stopping the locking piece 11, and when the first elastic piece 13 drives the locking piece 11 to reset, the locking piece 11 is prevented from excessively protruding into the first joint 4.

The second sliding groove 52 is arranged on the joint body 9, the second sliding groove 52 is concavely arranged on one side of the joint body 9, which is close to the seat body 51, when the snap fastener 12 is put into the second sliding groove 52 in actual use, the seat body 51 is utilized to cover the opening of the second sliding groove 52, so that the snap fastener 12 is packaged in the second sliding groove 52, and the snap fastener 12 is prevented from falling off through the opening of the second sliding groove 52; the snap fastener 12 comprises a pressing part 53 and a driving part 54 connected with the pressing part 53, the driving part 54 is slidably accommodated in the second chute 52, the pressing part 53 protrudes out of the joint body 9, and the driving part 54 is used for abutting against the locking piece 11.

In actual use, a user presses the pressing part 53 of the snap fastener 12 protruding out of the joint body 9 by using a finger, so that the pressing part 53 slides in the second sliding groove 52 together with the driving part 54, and as the driving part 54 abuts against the locking piece 11, the driving part 54 can drive the locking piece 11 to withdraw from the locking groove 8 when sliding, and after the locking piece 11 is completely withdrawn from the locking groove 8, the second joint 5 can be pulled out from the first joint 4, thereby separating the first joint 4 and the second joint 5 from each other, and further separating the folding seat frame 2 from the folding frame 1.

The joint body 9 is provided with two guide plates 55 located in the second sliding groove 52, preferably, the two guide plates 55 are spaced apart from each other and arranged in parallel, and the two guide plates 55 are protruded from the bottom wall of the second sliding groove 52; the joint body 9 is provided with a perforation 56 penetrating through the joint body 9, the perforation 56 is positioned between the two guide plates 55, the sliding direction of the lock block 11 is limited by the two guide plates 55, the lock block 11 is prevented from being skewed in the sliding process, and one end of the lock block 11 protrudes into the lock groove 8 through the perforation 56; after one end of the locking piece 11 protrudes into the locking groove 8, the side wall of the locking groove 8 abuts against the locking piece 11 to prevent the second joint 5 from falling off the first joint 4, so that the first joint 4 and the second joint 5 are clamped together.

The driving part 54 is provided with a guide hole 57 penetrating through the driving part 54, the two guide plates 55 are all located in the guide hole 57, the aperture of the guide hole 57 is larger than the distance between the two guide plates 55, when the driving part 54 slides relative to the first joint 4, the guide plates 55 can move in the guide hole 57, two ends of the first elastic piece 13 respectively abut against the seat body 51 and the other end of the locking piece 11, the first elastic piece 13 and the second elastic piece 14 are both springs, the sliding direction of the first elastic piece 13 is the same as the sliding direction of the locking piece 11, two ends of the second elastic piece 14 respectively abut against the locking piece 11 and the pressing part 53, the sliding direction of the second elastic piece 14 is the same as the sliding direction of the snap fastener 12, and the sliding direction of the locking piece 11 is perpendicular to the sliding direction of the snap fastener 12.

In this embodiment, the length direction of the first elastic member 13 is parallel to the sliding direction of the locking piece 11, the length direction of the second elastic member 14 is parallel to the sliding direction of the snap fastener 12, a positioning blind hole (not numbered in the figure) is disposed on one side of the seat body 51 close to the locking piece 11 and one side of the locking piece 11 close to the seat body 51, two ends of the first elastic member 13 are respectively accommodated in the positioning blind hole of the seat body 51 and the positioning blind hole of the locking piece 11, the side wall of the positioning blind hole blocks the first elastic member 13, and the first elastic member 13 is prevented from moving relatively to the seat body 51, and meanwhile, the first elastic member 13 is also prevented from moving relatively to the locking piece 11. The pressing part 53 is provided with a positioning concave hole (not shown in the figure) on one side close to the locking piece 11 and one side close to the pressing part 53 of the locking piece 11, and two ends of the second elastic piece 14 are respectively accommodated in the positioning concave hole of the pressing part 53 and the positioning concave hole of the locking piece 11.

Referring to fig. 1 to 11, the lock block 11 is connected with a rod 58, the rod 58 is a substantially bar-shaped cylinder, the lock block 11 is provided with a first guiding inclined plane 59 and a second guiding inclined plane 61 that facilitates the lock block 11 to protrude into the lock slot 8, the rod 58 is used to abut against the first guiding inclined plane 59, the first guiding inclined plane 59 and the second guiding inclined plane 61 are disposed in a crossing manner, and in this embodiment, the first guiding inclined plane 59 is disposed perpendicular to the second guiding inclined plane 61.

When a user presses the snap fastener 12 to enable the snap fastener 12 to slide relative to the joint body 9, the second sliding groove 52 is utilized to guide the sliding direction of the snap fastener 12, the rod body 58 moves together with the snap fastener 12 when the snap fastener 12 slides, the rod body 58 is abutted against the first guiding inclined plane 59, the rod body 58 and the first guiding inclined plane 59 can relatively move when moving, the moving rod body 58 pushes the locking piece 11 to enable the locking piece 11 to move in a direction far away from the first joint 4 until the locking piece 11 completely withdraws from the locking groove 8, and then the user can grasp the second joint 5, so that the protruding plate 15 of the second joint 5 withdraws from the first sliding groove 6 until the first joint 4 and the second joint 5 are separated from each other, and separation and detachment of the folding seat frame 2 and the folding frame 1 are achieved.

When the folding seat frame 2 is connected with the second joint 5 to complete the direction change, the protruding plate 15 of the second joint 5 is reinserted into the first chute 6, after the second joint 5 and the first joint 4 are assembled to the required position, the snap fastener 12 is loosened, the second elastic element 14 drives the snap fastener 12 to restore to the original position, meanwhile, the first elastic element 13 drives the locking piece 11 to protrude into the locking groove 8 again, and in the process that the locking piece 11 protrudes into the locking groove 8, the edge at the opening of the locking groove 8 is abutted against the second guiding inclined surface 61 due to the second guiding inclined surface 61, so that the locking piece 11 easily protrudes into the locking groove 8, and the clamping efficiency and the clamping yield of the first joint 4 and the second joint 5 are improved.

The lock block 11 is provided with a relief hole 62 penetrating the lock block 11, the rod body 58 is movably accommodated in the relief hole 62, a closed ring surrounding the rod body 58 is formed on the side wall of the relief hole 62, the rod body 58 is blocked by the closed ring, the rod body 58 is prevented from being separated from the lock block 11 along the radial direction of the rod body 58, and the first guide inclined plane 59 is the side wall on one side of the relief hole 62. Further, the side wall of the guide hole 57 forms a closed loop around the lock piece 11, with which the lock piece 11 is blocked, preventing the lock piece 11 from being separated from the snap fastener 12 in the axial direction of the rod 58.

The second joint 5 is provided with a guide rib 65 positioned in the first chute 6, the length direction of the guide rib 65 is parallel to the length direction of the first chute 6, the protruding plate 15 is provided with a guide groove 66, the guide rib 65 is slidingly accommodated in the guide groove 66, the side wall of the guide groove 66 is used for stopping the guide rib 65, after the protruding plate 15 of the second joint 5 is inserted into the first chute 6, the guide rib 65 is accommodated in the guide groove 66, the left side and the right side of the rib 16 are respectively stopped by utilizing the guide bar 7 and the bottom wall of the first chute 6, and the second joint 5 is prevented from moving along the left-right direction relative to the first joint 4; the second joint 5 is prevented from moving in the front-rear direction relative to the first joint 4 by stopping both sides of the guide rib 65 by the side walls on both sides of the guide groove 66; the second joint 5 is provided with a containing groove 68 for containing the folding seat frame 2, the containing groove 68 is concavely arranged on one side, far away from the joint body 9, of the seat body 51, the containing groove 68 is in a straight strip shape, the central axis of the containing groove 68 is crossed with the central axis of the first sliding groove 6, after the external folding seat frame 2 finishes reversing, the folding seat frame 2 and the folding seat frame 1 form an X shape, and the overall stability of the handcart is ensured.

The width of the pressing part 53 is larger than that of the driving part 54, a boss 67 protruding into the first sliding groove 6 is arranged on the first joint 4, the boss 67 is used for abutting against the pressing part 53, and when a user presses the snap fastener 12 to enable the snap fastener 12 to retract into the first sliding groove 6, the boss 67 is used for blocking the pressing part 53 to prevent the snap fastener 12 from being excessively inserted into the first sliding groove 6; a guide plate 55 is provided to abut against the side wall of the guide hole 57 at the end far from the pressing portion 53, and when the second elastic member 14 drives the snap fastener 12 to return to its original position, the guide plate 55 stops the side wall of the guide hole 57 at the end far from the pressing portion 53, thereby preventing the snap fastener 12 from being excessively withdrawn from the first slide groove 6.

The foregoing is merely exemplary of the present invention, and those skilled in the art should not be considered as limiting the invention, since modifications may be made in the specific embodiments and application scope of the invention in light of the teachings of the present invention.

Claims

1. A handcart with seat frame reversing function comprises a folding frame, a folding seat frame and reversing joints, wherein the folding frame and the folding seat frame are detachably connected through the reversing joints; the method is characterized in that: the reversing joint comprises a first joint and a second joint detachably connected with the first joint, wherein the first joint is provided with a first chute, a guide bar protruding into the first chute and a locking groove concavely arranged from the bottom wall of the first chute; the second joint comprises a joint body, a locking block, a snap fastener, a first elastic piece and a second elastic piece, wherein the joint body is provided with a protruding plate and a rib connected with the protruding plate, the protruding plate is slidingly accommodated in the first chute, and the rib is positioned between the guide bar and the bottom wall of the first chute; the locking block is movably arranged on the joint body, and the first elastic piece is used for driving the locking block to protrude into the locking groove; the snap fastener is movably arranged on the joint body, the second elastic piece is used for driving the snap fastener to reset, and the snap fastener is used for driving the locking piece to withdraw from the locking groove; the folding frame is used for being connected to the first joint, and the folding seat frame is used for being connected to the joint body; the first joint is provided with a first stop block, the joint body is provided with a second stop block, and the second stop blocks respectively abut against the left side and the right side of the first stop block before and after the direction change of the folding seat frame; the foldable frame comprises a third joint, a fourth joint, a shaft body, a hand pushing frame, a first support, a second support and a bottom frame, one ends of the first joint, the third joint and the fourth joint are rotatably arranged through the shaft body, one end of the first support is arranged on the third joint, the other end of the first support is rotatably arranged at one end of the bottom frame, one end of the second support is rotatably arranged at the other end of the fourth joint, the other end of the second support is rotatably arranged at the other end of the bottom frame, and one end of the hand pushing frame is arranged at the fourth joint; one end of the second bracket is provided with a pit, the fourth joint is provided with a movable lock column and a third elastic piece for driving the lock column to protrude into the pit, and the other end of the hand pushing frame is provided with an unlocking mechanism for driving the lock column to withdraw from the pit; when the folding seat frame is folded in the forward direction, the folding frame rotates together with the first stop block, the first stop block is mutually abutted with the second stop block, the first stop block is linked with the second stop block, and meanwhile, the joint body is linked with the hand pushing frame, so that folding and folding of the handcart are realized; when the folding seat frame is reversed, the folding seat frame is unlocked, the joint body is not linked with the hand pushing frame, the joint body is folded into the travel range of the bottom frame through the first joint, the bottom frame is abutted against the folding seat frame connected with the joint body, and folding of the folding seat frame is realized by folding of the bottom frame.

2. A cart having a saddle inversion function according to claim 1, wherein: the folding frame further comprises a fixed block arranged at one end of the fourth joint or the hand pushing frame, the lock column is arranged on the fixed block in a sliding mode, the third elastic piece is a spring, two ends of the third elastic piece respectively abut against the fixed block and the lock column, and the other end of the lock column protrudes into the pit; the unlocking mechanism comprises a wire drawing and a driving assembly arranged at the other end of the hand pushing frame, the driving assembly drives the lock column to be close to the fixed block through the wire drawing so that the other end of the lock column withdraws from the pit, and the third elastic piece is used for driving the lock column to protrude into the pit.

3. A cart having a saddle reversing function according to claim 2, wherein: the drive assembly includes the drive plate, keep off knot, fourth elastic component and guide pin, the drive plate, keep off knot and guide pin and all slide and set up in the other end of hand push frame, the fourth elastic component drives keeps off knot and contradicts the drive plate so that the drive plate is fixed on the other end of hand push frame, the slip direction of drive plate and the slip direction cross arrangement of guide pin, the drive plate is equipped with the guide slot, the guide pin is stretched into in the guide slot, the lateral wall of guide slot contradicts the guide pin, the one end that the lock post was kept away from in the wire drawing is connected in the guide pin, gliding drive plate drive guide pin is carried the wire drawing and is removed, the wire drawing pulling lock post of removal withdraws from in the pit.

4. A cart having a saddle inversion function according to claim 1, wherein: the fourth joint comprises a strip body, a first disc part arranged at one end of the strip body, and two second disc parts arranged at the other end of the strip body, wherein the two second disc parts are arranged at intervals and in parallel, one end of the hand pushing frame is arranged on the strip body, one end of the second bracket is rotatably arranged at the first disc part, the third joint is positioned between the two second disc parts, one side of the third joint is provided with an arc blind groove penetrating through one second disc part, the first joint is provided with a clamping block protruding into the arc blind groove, and the side walls at two ends of the arc blind groove are respectively used for abutting against the clamping blocks; the fourth joint is provided with a limit post connected with the two second disc parts, the third joint is provided with an arc-shaped penetrating groove penetrating through the third joint, the limit post is positioned in the arc-shaped penetrating groove, and side walls at two ends of the arc-shaped penetrating groove are respectively used for abutting against the limit post.

5. A cart having a saddle inversion function according to claim 1, wherein: the foldable seat frame comprises a seat rest frame, a pedal frame, an armrest frame and a sunshade, wherein the seat rest frame is detachably connected to the joint body, the pedal frame and the armrest frame are both rotatably arranged at one end of the seat rest frame, the sunshade is rotatably arranged at the other end of the seat rest frame, and the pedal frame and the seat rest frame are arranged in a coplanar mode.

6. A cart having a saddle inversion function according to claim 1, wherein: the second joint still includes the pedestal, and the pedestal is connected with the joint body can be dismantled, and the joint body is located between pedestal and the first joint, and folding seat frame detachably connects in the pedestal, and the locking piece slides and sets up between pedestal and the joint body, and the one end of locking piece runs through the joint body and stretches into the locked groove in, and the slip direction of locking piece and the slip direction cross arrangement of abrupt board.

7. The cart with saddle reversing function according to claim 6, wherein: the joint body is provided with a second chute, the second chute is concavely formed from one side, close to the base body, of the joint body, the snap fastener comprises a pressing part and a driving part connected with the pressing part, the driving part is slidingly accommodated in the second chute, the pressing part protrudes out of the joint body, and the driving part is used for abutting against the locking block.

8. The cart with saddle reversing function according to claim 7, wherein: the joint body is provided with two guide plates positioned in the second sliding groove, the joint body is provided with a through hole penetrating through the joint body, the through hole is positioned between the two guide plates, the locking block is arranged between the two guide plates in a sliding mode, and one end of the locking block protrudes into the locking groove through the through hole.

9. The cart with saddle reversing function according to claim 8, wherein: the drive part is provided with a guide hole penetrating through the drive part, the two guide plates are located in the guide hole, two ends of the first elastic piece respectively abut against the other ends of the base body and the locking piece, and two ends of the second elastic piece respectively abut against the locking piece and the pressing part.