CN216468040U - Hand cart - Google Patents

Abstract

The application discloses handcart has expansion state and fold condition, includes the frame construction who constitutes by fore-stock, after-poppet, chassis and both sides frame, the side bearer has folding joint and both ends respectively with fore-stock and after-poppet articulated two last quarter tabs and two lower quarter tabs including the centre to and both ends respectively with two pole settings of folding articulated connection, be provided with in the pole setting and follow its length direction gliding sliding sleeve, respectively be provided with one between two sections around sliding sleeve and the last quarter tab and draw back the pole to one side, and be provided with the locking device who keeps the handcart to be in expansion state between sliding sleeve and the pole setting, during folding, two quarter tabs, the vertical rebound of pole setting, the sliding sleeve is followed the pole setting and is moved down, draws back to the pole setting to one side. A locking device is arranged between the sliding sleeve and the upright rod to keep the whole vehicle in an unfolded state, so that the vehicle is prevented from being folded accidentally after passing through a bumpy road section or being subjected to strong vibration.

Description

Hand cart

Technical Field

The application relates to the technical field of children's vehicles, in particular to a foldable handcart.

Background

The trolley is a mobile carrier for carrying children or loading articles, and has a foldable structure for convenient storage and carrying.

For example, chinese patent publication No. CN 110356448A discloses a cart, which includes two side frames arranged side by side, and a plurality of supporting members connected to the two side frames, wherein the supporting members include a first connecting member and a second connecting member, a limiting seat is disposed between the two connecting members, the limiting seat has a dead point during the folding process of the entire cart, the vehicle is locked after the dead point is passed, the frame is kept in an unfolded state, and the upper and lower joints are abutted to further ensure the stable unfolding of the frame. The side frame comprises an upper front swing rod and an upper rear swing rod, the upper front swing rod and the upper rear swing rod are pressed firstly in the unfolding process, so that the first connecting piece and the second connecting piece are firstly far away, and then certain acting force is applied to the limiting seat to enable the limiting seat to cross a dead point. When unlocking, acting force needs to be applied to the limiting seat to unlock the limiting seat, and the operation of bending over is laborious. And under the condition of strong vibration, the condition of sudden folding still occurs, and potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The application provides a handcart has improved the steadiness under the expansion state.

The utility model provides a handcart has expansion state and fold condition, includes the frame construction who constitutes by fore-stock, after-poppet, chassis and both sides frame, the side bearer has folding joint and both ends respectively with fore-stock and two lower folding rods on the after-poppet articulated respectively including the centre to and both ends respectively with the pole setting of two folding joint connections, be provided with in the pole setting and follow its length direction gliding sliding sleeve, slide sleeve and last two sections of front and back of two folding rods respectively are provided with one between to one side the pull rod, and be provided with the locking device who keeps the handcart to be in expansion state between slide sleeve and the pole setting, during folding, two folding rod fifty percent discount, the vertical rebound of pole setting, the slide sleeve is followed the pole setting and is removed downwards, draws together to the pole setting to one side the pull rod.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

In the present application, unless otherwise specified, the positional relationship of the components mentioned above means that in the unfolded state, the folded state generally means a completely folded state, and if an intermediate state is specified, it is also specified. When considered in combination with physical considerations, the various states are not intended to be specific to the current state, but rather should be understood to have the potential or ability to switch to the various states.

Optionally, the locking device includes:

the locking groove is formed in the sliding sleeve;

the lock pin can slide along the radial direction of the upright rod, and the lock pin protrudes out of the upright rod in a locking state to be matched with the lock groove;

and in a locking state, the lock pin extends out of the vertical rod and into the lock groove.

Optionally, an unlocking piece for driving the lock pin to exit the lock groove is arranged at the folding joint.

Optionally, it is provided with the transmission assembly that transmits the effort of unblocking piece to the lockpin to slide in the pole setting, transmission assembly includes:

the transmission block is arranged in the vertical rod in a sliding mode along the axial direction of the vertical rod, acts on the lock pin and guides the lock pin to extend into or exit from the lock groove;

the elastic piece is arranged in the vertical rod, acts on the transmission block to reset the transmission block, and extends out of the vertical rod corresponding to the lock pin;

the two ends of the pull wire are respectively connected with the unlocking piece and the transmission block.

Optionally, the driving block is provided with a guide groove which is obliquely arranged relative to the moving direction of the driving block, and the lock pin is provided with a pin rod which passes through the guide groove.

Optionally, a guide seat is fixedly arranged in the upright rod, a first sliding groove for the transmission block to slide is formed in the guide seat, the elastic element is arranged in the first sliding groove, and a second sliding groove for the lock pin to slide is further formed in the guide seat.

Optionally, the transmission block is provided with an avoidance groove for avoiding the lock pin during movement of the transmission block.

Optionally, the part of the lock pin extending out of the vertical rod is provided with an inclined plane, and in the unfolding process, the sliding sleeve acts on the inclined plane to enable the inclined plane to slide and extend into the vertical rod, and the lock pin extends into the lock groove in a proper manner after the lock groove is aligned with the lock pin.

Optionally, during the folding/unfolding process, the rotation directions of the lower folding rod and the upper folding rod are the same.

Optionally, a unidirectional rotation limiting structure is arranged between the folding joint and the front section and the rear section of the two folding rods.

The utility model provides a be provided with locking device between the sliding sleeve of handcart and the pole setting, can order about oblique pull rod and support and lean on two folding rods under the expansion state for whole car is in the expansion state, even receive strong vibration whole car also can not take place foldingly.

Drawings

FIG. 1 is a schematic view of a cart according to an embodiment of the present disclosure;

FIG. 2 is a front view of a cart according to an embodiment of the present application;

FIG. 3 is a schematic view of the cart of FIG. 2 during rotation;

FIG. 4 is a schematic view of the stroller of FIG. 2 in a folded state;

FIG. 5 is an exploded view of the upper folding joint of FIG. 1;

FIG. 6 is a cross-sectional view of the locking device of FIG. 2 in a locked state at the upper folding joint;

FIG. 7 is a cross-sectional view of the locking device of FIG. 6 in an unlocked state;

FIG. 8 is a perspective view of the upper folding joint of FIG. 5;

FIG. 9 is a perspective view of the drive block of FIG. 5;

fig. 10 is a cross-sectional view of the unidirectional rotation restriction mechanism at the lower folding joint of fig. 2.

The reference numerals in the figures are illustrated as follows:

100. a front frame; 110. a front wheel; 200. a rear frame; 210. a rear wheel; 300. a chassis;

400. a side frame; 410. a folding joint; 411. an upper folding joint; 412. a lower folding joint; 413. a stopper; 420. two folding rods are arranged; 430. a lower second folding rod; 440. erecting a rod;

441. a sliding sleeve; 442. a diagonal member; 443. a lug; 444. avoiding holes; 510. locking the groove;

520. a lock pin; 521. a bevel; 522. a pin rod; 530. unlocking the lock; 541. a transmission block; 542. an elastic member;

543. a pull wire; 544. a guide groove; 545. an avoidance groove;

550. a guide seat; 551. a first chute; 552. a second runner.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

In this application, the terms "center", "length", "width", "thickness", "top end", "bottom end", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "axial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in some drawings, or based on the spatial attitude of the product in normal use, and are of course only for the convenience of describing and simplifying the present invention, and do not indicate or imply that the position or element referred to must have a specific orientation, be of a specific construction and operation, and therefore should not be construed as limiting the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 4, the present application provides a cart including a frame structure consisting of a front frame 100, a rear frame 200, a bottom frame 300, and two side frames 400. The side frame 400 includes an upper folding rod 420 and a lower folding rod 430 having a folding joint 410 in the middle and having two ends respectively hinged to the front frame 100 and the rear frame 200, and a vertical rod 440 having two ends respectively connected to the two folding joints 410, wherein the vertical rod 440 is provided with a sliding sleeve 441 capable of sliding along the length direction thereof. When the sliding sleeve 441 slides along the upright 440, the two-folding rods are driven to fold, so that the trolley has an unfolded state and a folded state.

First, the front frame 100 and the rear frame 200 refer to a front-rear relationship when the cart is pushed forward, but not limited to front-rear in an absolute direction, and specifically, when a user stands on the front frame 100 of the cart and acts on the front frame 100 to move the cart in a direction toward the rear frame 200 with reference to a user use state, for example, the rear frame 200 is located in a front direction. The frame structure is hollow inside and is used for carrying children or carrying articles, and for the sake of comfort, the frame structure can be sleeved with a cloth sleeve, a cushion or a seat and the like. Of course, the front and rear frames 100 and 200 have front and rear wheels 110 and 210, respectively, mounted to the bottom thereof for easy pushing.

Wherein, two folding joints 410 are disposed at the upper and lower parts of the vertical rod 440, and the two folding rods are understood as two rods capable of mutually rotating and folding, in this embodiment, the two rods rotate and fold around the folding joints 410, for example, the rod of the two folding rods is hinged with the corresponding folding joint 410. The movement change of the two folding rods changes the state of the handcart. The method specifically comprises the following steps:

a diagonal draw bar 442 is respectively arranged between the front section and the rear section of the sliding sleeve 441 and the upper two-fold bar 420, a locking device for keeping the handcart in an unfolding state is arranged between the sliding sleeve 441 and the upright rod 440, when the handcart is folded, the two-fold bars are folded, the upright rod 440 vertically moves upwards, the sliding sleeve 441 moves downwards along the upright rod 440, the diagonal draw bar 442 moves towards the upright rod 440, the left and right sections of the rod piece corresponding to the upper two-fold bar 420 rotate and are close to the upright rod 440, meanwhile, as the lower folding joint 412 moves upwards, the left and right sections of the lower two-fold bar 430 immediately rotate and are close to the upright rod 440, and then the upper and lower parts of the front frame 100 and the rear frame 200 are pulled, so that the two parts can stably move and mutually close to realize folding.

When the foldable bicycle is unfolded, the components and assemblies move in opposite directions, for example, a force is applied downwards to the top of the upright rod, so that the sliding sleeve 441 can move upwards, the inclined pull rod 442 pushes the left and right sections of the upper two-folding rod 420, the two sections rotate away from the upright rod 440, and as the lower folding joint 412 moves downwards, the left and right sections of the lower two-folding rod 430 immediately rotate away from the upright rod 440, and further push the upper and lower sections of the front frame 100 and the rear frame 200 away from each other until the locking device is locked. Generally, in the unfolded state, the left and right sections corresponding to the two folding rods keep the same straight line. The locking device can make the left and right two sections of the upper two-fold rod 420 respectively form two triangle structures which can not be folded and moved corresponding to the diagonal draw bar 442 and the vertical rod 440 connected with the upper two-fold rod in the locking state, so as to keep the whole vehicle in a stable unfolding state. The folding by accident under the condition of passing through a hollow section and strong vibration is avoided, and the use safety is improved. In the case of the front frame 100, the upright 440, the front frame 100, and the front-section bars of the upper two-fold bar 420 and the lower two-fold bar 430 form a foldable four-bar linkage structure, during the folding/unfolding process, the upright 440 moves up/down, the rotation directions of the front-section bars of the upper two-fold bar 420 and the lower two-fold bar 430 are the same, and the rotation directions of the two-fold bars are the same, so the rotation directions of the lower two-fold bar 430 and the upper two-fold bar 420 are the same.

In one embodiment, a unidirectional rotation limiting structure is arranged between the folding joint 410 and the front section and the rear section of the corresponding folding rod. Referring to fig. 10, the lower folding joint 412 has two stoppers 413 extending in the front and rear directions, respectively, and in the unfolded state, the stoppers 413 abut against the front and rear rod members to keep the lower folding rod 430 flat. The lower folding rod 430 is used as a part of the bottom frame 300, and when the two rods abut against each other, the two front and rear rods are in the same straight line, so as to keep the bottom frame 300 flat. When a child is loaded or an article is loaded, the stopper 413 abuts against the lower folding rod 430, so that the bottom frame 300 cannot rotate, and the bearing capacity of the bottom frame 300 is improved. The upper folding joint can also adopt a similar structure.

The upright 440 is a rod and has an axial direction and a radial direction. The axial direction of the rod member, regardless of the shape of the rod member in cross section, such as a circular shape or a rectangular shape, is understood to be a longitudinal direction, and perpendicular to the axial direction is a radial direction. In some embodiments, the locking device includes a locking groove 510 formed on the sliding sleeve 441, and a locking pin 520 capable of sliding along a radial direction of the vertical rod 440, wherein the locking pin 520 protrudes from the vertical rod 440 and is engaged with the locking groove 510 in a manner that the locking pin 520 can extend into the locking groove 510 and abut against a wall of the locking groove to limit the sliding of the sliding sleeve 441 in the locked state. Accordingly, the vertical rod 440 is axially provided with an escape hole 444 through which the locking pin 520 extends. In this embodiment, the latch 520 is moved in a direction within the plane defined by the sideframe 400, preferably in a forward and rearward sliding direction. Wherein, the sliding sleeve 441 has lugs 443 hinged with the diagonal draw bar 442 at the front and rear ends thereof, and the locking slots 510 are disposed in the lugs 443.

In one embodiment, an unlocking member 530 for driving the locking pin 520 out of the locking groove 510 is provided at the folding joint 410. Wherein, the unlocking piece 530 is arranged at the upper folding joint 411, which reduces the bending range and facilitates the unlocking. In this embodiment, a transmission assembly for transmitting the acting force of the unlocking member 530 to the lock pin 520 is slidably disposed in the vertical rod 440, and the transmission assembly includes a transmission block 541, an elastic member 542 and a pull wire 543, wherein the transmission block 541 is slidably mounted in the vertical rod 440 along an axial direction of the vertical rod, acts on the lock pin 520 and guides the lock pin 520 to extend into or exit from the lock slot 510, the transmission block 541 converts the axial sliding of itself into a radial sliding of the lock pin 520, for example, the transmission block moves upward axially, and the lock pin 520 slides out of the lock slot 510 radially; the driving block 541 moves axially downward and the locking pin slides radially out of the vertical rod 440. The axial sliding unlocking of the transmission block 541 is realized through the sliding motion of the unlocking piece 530, specifically, the two ends of the pull wire 543 are respectively connected with the unlocking piece 530 and the transmission block 541, so that the synchronous sliding of the two is realized.

The resilient member 542 is typically a spring and is disposed within the upright 440 and acts on the drive block 541 to reset (move axially downward) the lock pin 520 extending out of the upright 440. The lower portion of the lock pin 520 is provided with a slope 521, the sliding sleeve 441 abuts against the slope 521 in the upward moving process to enable the lock pin 520 to slide and extend into the upright rod 440, the corresponding transmission block 541 compresses the elastic member 542 under the action of the lock pin 520, and when the lock groove 510 is aligned with the lock pin 520, the lock pin 520 slides and extends out of the upright rod 440 corresponding to the lock pin 520, and locking is completed.

In one embodiment, the driving block 541 has a guide slot 544 inclined with respect to the moving direction thereof, and the locking pin 520 has a pin rod 522 passing through the guide slot 544. The guide groove 544 has a component in both the sliding direction of the transmission block 541 and the sliding direction of the lock pin 520, thereby realizing the mutual conversion of the transmission block 541 and the lock pin 520 in the sliding direction. The transmission block 541 is provided with an avoiding groove 545 for avoiding the lock pin during movement, and the avoiding groove 545 extends along the sliding direction of the transmission block 541 to avoid interference with the lock pin 520 in the sliding process.

In an embodiment, a guide seat 550 is fixedly disposed in the vertical rod 440, a first sliding slot 551 for the driving block 541 to slide is disposed in the guide seat 550, the elastic member 542 is disposed in the first sliding slot 551, and a second sliding slot 552 for the locking pin 520 to slide is further disposed in the guide seat 550. After the guide seat 550 is fixedly arranged, the transmission block 541 and the lock pin 520 only slide in the corresponding sliding grooves, the first sliding groove 551 extends along the axial direction of the vertical rod, and the second sliding groove 552 extends along the front-back direction.

The sliding sleeve in the handcart of this application sets up locking device as folding motion's the original paper that triggers between sliding sleeve and pole setting and keeps the state of expanding of whole car, avoids folding by accident after jolting the highway section or stand strong vibrations to corresponding unlocking piece sets up in the place that the operator of being convenient for touched, reduces the range of bowing.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features. Features of different embodiments are shown in the same drawing, which is to be understood as also disclosing combinations of the various embodiments concerned.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims (10)

1. The handcart has expansion state and fold condition, includes the frame construction who constitutes by fore-stock, after-poppet, chassis and both sides frame, the side bearer has folding joint and both ends respectively with fore-stock and two lower folding rods on the after-poppet articulated respectively including the centre to and both ends respectively with two folding joint connected's pole setting, be provided with the gliding sliding sleeve of its length direction of following in the pole setting, its characterized in that, respectively be provided with a diagonal draw bar between two sections around sliding sleeve and the last folding rod, and be provided with the locking device who keeps the handcart to be in expansion state between sliding sleeve and the pole setting, during folding, two folding rod fifty percent discount, the vertical rebound of pole setting, the sliding sleeve is followed the pole setting and is moved down, and the diagonal draw bar is drawn close to the pole setting.

2. A trolley according to claim 1, characterized in that the locking device comprises:

the locking groove is formed in the sliding sleeve;

the lock pin can slide along the radial direction of the vertical rod, and the lock pin protrudes out of the vertical rod in a locking state to be matched with the lock groove;

and in a locking state, the lock pin extends out of the vertical rod and into the lock groove.

3. A trolley according to claim 1, characterized in that the folding joint is provided with an unlocking member for driving the locking pin out of the locking groove.

4. A trolley as claimed in claim 3, characterized in that a transmission assembly is slidably arranged in the upright for transmitting the force of the unlocking member to the locking pin, said transmission assembly comprising:

the transmission block is arranged in the vertical rod in a sliding mode along the axial direction of the vertical rod, acts on the lock pin and guides the lock pin to extend into or exit from the lock groove;

the elastic piece is arranged in the vertical rod, acts on the transmission block to reset the transmission block, and extends out of the vertical rod corresponding to the lock pin;

the two ends of the pull wire are respectively connected with the unlocking piece and the transmission block.

5. A trolley according to claim 4, characterized in that the driving block is provided with a guide slot which is arranged obliquely with respect to the direction of movement of the driving block, and the locking pin has a pin shank which passes through the guide slot.

6. A trolley according to claim 4, characterized in that a guide seat is fixedly arranged in the upright, a first sliding groove for the sliding of the driving block is arranged in the guide seat, the elastic element is arranged in the first sliding groove, and a second sliding groove for the sliding of the locking pin is arranged in the guide seat.

7. A trolley according to claim 6, characterized in that the driving block is provided with an escape slot for avoiding the locking pin when the driving block moves.

8. A trolley as claimed in claim 2, wherein the part of the latch extending beyond the upright is provided with a ramp, and during deployment the sleeve acts on the ramp to slide the latch into the upright until the slot is aligned with the latch, the latch then extending into the slot.

9. A stroller according to claim 1, wherein the lower second folding bar rotates in the same direction as the upper second folding bar during folding/unfolding.

10. A trolley according to claim 1, characterized in that a unidirectional rotation limiting structure is provided between the folding joint and the front and rear sections of the folding bar.

Images