CN215154954U - Universal wheel positioning and switching mechanism and baby carriage comprising same - Google Patents

Abstract

The utility model discloses an universal wheel location shifter and contain its bassinet, universal wheel location shifter, it includes: the hand pushing device comprises a wheel carrier, a front universal wheel, a rear universal wheel, a front wheel positioning mechanism, a rear wheel positioning mechanism, a front trigger, a rear trigger and a hand pushing frame. The pushing frame is rotatably arranged on the wheel frame, a contact part is arranged on the pushing frame, and when the pushing frame rotates from one side close to the front universal wheel to a position close to one side of the rear universal wheel, the contact parts can respectively contact the front trigger part and the rear trigger part; when the touch part touches the front trigger piece, the front wheel positioning mechanism positions the advancing direction of the front universal wheel; when the touch part touches the rear trigger part, the rear wheel positioning mechanism positions the advancing direction of the rear universal wheel. The universal wheel positioning and switching mechanism with the structure and the baby carrier comprising the same have the advantages of simple structure and convenience in use.

Description

Universal wheel positioning and switching mechanism and baby carriage comprising same

Technical Field

The utility model relates to a location technique of universal wheel, in particular to universal wheel location shifter and contain its bassinet.

Background

In a conventional stroller, the rear wheels are fixed in the traveling direction, while the front wheels are generally provided in a universal wheel structure and can travel in different directions, so that the stroller can be turned conveniently. In order to facilitate the conversion of the pushing direction of the baby carriage, the front wheels and the rear wheels of some existing baby carriages are all universal wheel structures, the front wheels or the rear wheels can be selectively positioned through a universal wheel positioning conversion mechanism, so that the traveling direction of the baby carriage is fixed, and the other wheel set of the front wheels or the rear wheels still has the function of keeping universal rotation. The conversion of the pushing direction of the baby carriage can be realized through the universal wheel positioning conversion mechanism, and the use is convenient. However, the existing universal wheel positioning and switching mechanism is complex in structure, not beneficial to maintenance and overhaul and inconvenient to use.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an universal wheel location shifter, simple structure, convenient to use.

The utility model discloses still provide a bassinet of having above-mentioned universal wheel location shifter.

According to the utility model discloses a universal wheel positioning conversion mechanism of first aspect embodiment, it includes: a wheel carrier; the front universal wheel is arranged on the wheel frame; the rear universal wheel is arranged on the wheel frame; the front wheel positioning mechanism is arranged on the wheel carrier and used for positioning the front universal wheel so as to keep the front universal wheel in a fixed advancing direction; the rear wheel positioning mechanism is arranged on the wheel carrier and used for positioning the rear universal wheel so as to keep the rear universal wheel in a fixed advancing direction; the front trigger piece is movably arranged on the wheel carrier and is connected with the front wheel positioning mechanism and used for controlling the front wheel positioning mechanism to act; the rear trigger piece is movably arranged on the wheel carrier and is connected with the rear wheel positioning mechanism and used for controlling the rear wheel positioning mechanism to act; the hand pushing frame is rotatably arranged on the wheel frame, a contact part is arranged on the hand pushing frame, and when the hand pushing frame rotates from one side close to the front universal wheel to a position close to one side of the rear universal wheel, the contact part can respectively contact the front trigger part and the rear trigger part; when the touch part touches the front trigger piece, the front wheel positioning mechanism positions the advancing direction of the front universal wheel; when the touch part touches the rear trigger part, the rear wheel positioning mechanism positions the advancing direction of the rear universal wheel.

According to the utility model discloses universal wheel location shifter has following beneficial effect at least: when the push handle frame is rotated to a position close to one side of the rear universal wheel, the touch part touches the rear trigger piece, the rear wheel positioning mechanism positions the advancing direction of the rear universal wheel, the front universal wheel is not positioned, the universal turning capacity is kept, and at the moment, the advancing direction of the whole wheel frame is from back to front. When the push hand frame is rotated to a position close to one side of the front universal wheel, the touch part touches the front trigger piece, the front wheel positioning mechanism positions the advancing direction of the front universal wheel, the rear universal wheel is not positioned, the universal turning capacity is kept, and at the moment, the advancing direction of the whole wheel frame is from the front to the rear. The universal wheel positioning and switching mechanism is simple and visual in structure and easy to implement and overhaul. In addition, when the pushing hand frame is positioned at one side position close to the front universal wheel, the front universal wheel is just positioned, and when the pushing hand frame is positioned at one side position of the rear universal wheel, the rear universal wheel is just positioned, so that the pushing hand frame is always positioned behind the advancing direction of the wheel frame, and a user can conveniently hold the wheel frame for use.

According to some embodiments of the present invention, the front triggering member is movably connected to the wheel frame along a predetermined direction, the wheel frame is provided with a first elastic member for resetting the front triggering member, and the touching portion can push the front triggering member to move and compress the first elastic member; the front wheel positioning mechanism comprises a front lock pin and a second elastic piece; the front lock pin is movably arranged on the wheel carrier and can stretch relative to the wheel carrier, the second elastic piece is arranged on the wheel carrier and enables the front lock pin to have a stretching trend, a front lock hole is formed in the front universal wheel, and when the front lock pin stretches out, the front lock pin can be inserted into the front lock hole and can be used for positioning the advancing direction of the front universal wheel; the front trigger piece and the front lock pin are connected through a first linkage piece, and when the touch part pushes the front trigger piece to move and compress the first elastic piece, the front lock pin can extend out relative to the wheel frame through the second elastic piece; when the touch part deviates from the front trigger piece to enable the front trigger piece to reset, the front trigger piece can drive the front lock pin to move through the first linkage piece, so that the front lock pin retracts relative to the wheel frame.

According to some embodiments of the present invention, the rear trigger is movably connected to the wheel frame along a predetermined direction, the wheel frame is provided with a third elastic member for resetting the rear trigger, and the contact portion can push the rear trigger to move and compress the third elastic member; the rear wheel positioning mechanism comprises a rear lock pin and a fourth elastic piece; the rear lock pin is movably arranged on the wheel carrier and can stretch relative to the wheel carrier, the fourth elastic piece is arranged on the wheel carrier and enables the rear lock pin to have a stretching trend, a rear lock hole is formed in the rear universal wheel, and when the rear lock pin stretches out, the rear lock pin can be inserted into the rear lock hole and positions the advancing direction of the rear universal wheel; the rear trigger piece is connected with the rear lock pin through a second linkage piece, and when the touch part pushes the rear trigger piece to move and compress the third elastic piece, the rear lock pin can extend out relative to the wheel carrier through the fourth elastic piece; when the touch part deviates from the rear trigger part and the rear trigger part is reset, the rear trigger part can drive the rear lock pin to move through the second linkage part, so that the rear lock pin retracts relative to the wheel carrier.

According to some embodiments of the utility model, the pushing handle frame is provided with the joint seat, the pushing handle frame passes through the joint seat with the wheel carrier rotates to be connected, touch the portion including set up in two lug portions on the joint seat is global, two lug portion respectively with preceding trigger with the back trigger corresponds.

According to some embodiments of the present invention, the first linking member and the second linking member are pull wires.

According to some embodiments of the utility model, be provided with preceding sliding tray and back sliding tray on the wheel carrier, preceding trigger with back trigger slide respectively set up in preceding sliding tray with back sliding tray, install on the wheel carrier and cover respectively preceding sliding tray with the protecgulum and the back lid of the notch of back sliding tray, the protecgulum with the setting can be dismantled to the back lid.

According to some embodiments of the invention, the frame further comprises a locking mechanism for positioning the position of the frame relative to the wheel carrier; the locking mechanism comprises a first clamping groove, a second clamping groove, a clamping block, a fifth elastic piece and an unlocking mechanism; the first clamping groove is formed in the hand pushing frame, the second clamping groove is formed in the wheel carrier, the first clamping groove and the second clamping groove are enclosed to form a movable cavity, the clamping block is movably arranged in the movable cavity, the clamping block can be simultaneously in clamping fit with the first clamping groove and the second clamping groove and limits the hand pushing frame to rotate relative to the wheel carrier, the fifth elastic element is used for enabling the clamping block to reset to a position where the clamping block is matched with the first clamping groove and the second clamping groove at the same time, and the unlocking mechanism is connected with the clamping block and used for driving the clamping block to move so that the clamping block can be separated from the first clamping groove or the second clamping groove.

According to some embodiments of the invention, the unlocking mechanism comprises an axial moving part, a radial moving part and an operating mechanism; the axial moving part is movably arranged on the push hand frame and can follow the axial movement of the rotation axis of the push hand frame, the radial moving part is movably arranged on the axial moving part and can follow the radial movement of the rotation axis of the push hand frame, when the radial moving part moves radially, the radial moving part is linked through a linkage mechanism, the axial moving part moves axially, the axial moving part is provided with a pushing part used for pushing the clamping block, and the operating mechanism is connected with the radial moving part and used for driving the radial moving part to move.

According to some embodiments of the present invention, the axial moving member and the radial moving member can rotate together with the handle frame, the clamping block is provided with a locking portion, the radial moving member is provided with a locking mating portion, and when the handle frame rotates relative to the wheel frame to switch positions, the locking portion and the locking mating portion can mate with each other and lock the radial position of the radial moving member, so that the clamping block is maintained in a state of being disengaged from the first engaging groove or the second engaging groove; and when the radial moving part moves to a position corresponding to the position-giving part, the radial moving part can reset so that the clamping block can reset to a position matched with the first clamping groove and the second clamping groove at the same time.

A stroller according to a second aspect of the present invention includes the above-described universal wheel positioning conversion mechanism.

According to the utility model discloses bassinet has following beneficial effect at least: due to the adoption of the universal wheel positioning and switching mechanism, the structure for switching the advancing direction is simple, the implementation is easy, and the use is convenient.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic perspective view of a pushing handle frame of an embodiment of the present invention located near one side of a rear wheel assembly;

FIG. 2 is a schematic view of the structure of FIG. 1 with the front and rear casters removed;

FIG. 3 is an enlarged schematic view of FIG. 2 at A;

FIG. 4 is an enlarged view of FIG. 2 at B;

fig. 5 is a perspective view of the pushing handle frame of the embodiment of the present invention located near one side of the front wheel assembly;

FIG. 6 is an enlarged schematic view of FIG. 5 at C;

FIG. 7 is an enlarged view of FIG. 5 at D;

FIG. 8 is an exploded view of the structure shown in FIG. 1;

FIG. 9 is an enlarged view of FIG. 8 at E;

FIG. 10 is an enlarged schematic view of FIG. 8 at F;

FIG. 11 is an enlarged view at G of FIG. 8;

fig. 12 is a schematic perspective view of a rear universal wheel according to an embodiment of the present invention;

fig. 13 is a schematic perspective view of a front universal wheel according to an embodiment of the present invention;

FIG. 14 is a cross-sectional view taken along line K-K of FIG. 1;

fig. 15 is a schematic structural view of the fixture block and the unlocking mechanism according to the embodiment of the present invention;

fig. 16 is a schematic structural view of the radial movable member according to the embodiment of the present invention after radial movement;

fig. 17 is a schematic structural view illustrating a fixture block of the embodiment of the present invention when the fixture block is disengaged from the first engaging groove;

fig. 18 is a schematic structural view of the radial movable member according to the embodiment of the present invention rotating with the handle holder and being positioned at the radial position;

fig. 19 is a schematic structural view of the radial moving member according to the embodiment of the present invention rotating to the corresponding another relief portion along with the pushing rack.

Reference numerals:

wheel frame 100, front frame 101, rear frame 102, front sliding groove 110, rear sliding groove 120, front cover 130, rear cover 140;

a front universal wheel 200, a front lock hole 210;

a rear universal wheel 300, a rear lock hole 310;

a front wheel positioning mechanism 400, a front lock pin 410, a second elastic member 420, a first linkage member 430;

the rear wheel positioning mechanism 500, the rear lock pin 510, the fourth elastic member 520, and the second linkage member 530;

a front trigger 600, a first elastic member 601;

a rear trigger 700, a third elastic member 701;

a hand rest 800, a touch part 810, a bump part 811 and a joint seat 820;

the locking mechanism comprises a first clamping groove 910, a second clamping groove 920, a clamping block 930, a clamping lock 931, a fifth elastic element 940, an axial moving element 951, a pushing part 9511, a second inclined surface part 9512, a radial moving element 952, a first inclined surface part 9521, a clamping lock matching part 9522 and an operating mechanism 953.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 7, the universal wheel positioning conversion mechanism includes: the wheel carrier 100, the front universal wheel 200, the rear universal wheel 300, the front wheel positioning mechanism 400, the rear wheel positioning mechanism 500, the front trigger 600, the rear trigger 700 and the hand pushing carrier 800. Wherein,

the front and rear universal wheels 200 and 300 are provided to the wheel frame 100. The front and rear universal wheels 200 and 300 each include a wheel base and wheels rotatably installed on the wheel base, the wheel base is pivotally connected to the wheel frame 100 through a vertically installed wheel shaft, and the entire universal wheel can rotate in a horizontal plane, thereby changing the traveling direction. In the present embodiment, the wheel carriage 100 is composed of a front carriage 101 and a rear carriage 102.

The front wheel positioning mechanism 400 is disposed on the wheel frame 100, and is used for positioning the front universal wheel 200 so as to keep the front universal wheel 200 in a fixed traveling direction; the rear wheel positioning mechanism 500 is provided to the wheel carriage 100 and positions the rear universal wheel 300 such that the rear universal wheel 300 maintains a fixed traveling direction. The front trigger 600 is movably arranged on the wheel carrier 100, and the front trigger 600 is connected with the front wheel positioning mechanism 400 and used for controlling the front wheel positioning mechanism 400 to act; the rear trigger 700 is movably disposed on the wheel frame 100, and the rear trigger 700 is connected to the rear wheel positioning mechanism 500 and is used for controlling the rear wheel positioning mechanism 500 to operate.

The handle frame 800 is rotatably disposed on the wheel frame 100, and can be connected by a pivot structure. The handle frame 800 is provided with a touch part 810, and when the handle frame 800 rotates from a side close to the front universal wheel 200 to a position close to a side of the rear universal wheel 300, the touch part 810 can touch the front trigger 600 and the rear trigger 700 respectively. In the present embodiment, a side close to the front caster 200 refers to a front side region of a vertical plane M, and a position close to a side of the rear caster 300 refers to a rear side region of the vertical plane M, wherein the vertical plane M is a plane passing through the rotation axis of the push handle 800.

When the touching portion 810 touches the front trigger 600 (as shown in fig. 5 to 7), the front wheel positioning mechanism 400 positions the traveling direction of the front universal wheel 200. When the touching portion 810 touches the rear trigger 700 (as shown in fig. 2 to 4), the rear wheel positioning mechanism 500 positions the traveling direction of the rear universal wheel 300.

When the stroller 800 is rotated to a position close to the rear universal wheel 300 (as shown in fig. 2), the touch part 810 touches the rear trigger 700, the rear wheel alignment mechanism 500 aligns the traveling direction of the rear universal wheel 300, and the front universal wheel 200 is not aligned, which maintains the universal turning capability, in which the traveling direction of the entire truck 100 is from the rear to the front. When the hand-pushing frame 800 is rotated to a position close to one side of the front universal wheel 200 (as shown in fig. 5), the touching part 810 touches the front trigger 600, the front wheel positioning mechanism 400 positions the traveling direction of the front universal wheel 200, the rear universal wheel 300 is not positioned, and the universal turning capability is maintained, at this time, the traveling direction of the whole wheel frame 100 is from front to back. The universal wheel positioning and switching mechanism is simple and visual in structure and easy to implement and overhaul. In addition, when the hand pushing frame 800 is located at a position close to one side of the front universal wheel 200, the front universal wheel 200 is just positioned, and when the hand pushing frame 800 is located at a position close to one side of the rear universal wheel 300, the rear universal wheel 300 is just positioned, so that the hand pushing frame 800 is always located behind the traveling direction of the wheel frame 100, and a user can conveniently hold the hand pushing frame.

Referring to fig. 8 to 13, in the present embodiment, the front trigger 600 is movably connected to the wheel frame 100 along a predetermined direction, the wheel frame 100 is provided with a first elastic member 601 for restoring the front trigger 600, and the touching portion 810 can push the front trigger 600 to move and compress the first elastic member 601; the front wheel positioning mechanism 400 includes a front lock pin 410 and a second elastic member 420; the front lock pin 410 is movably arranged on the wheel frame 100 and can extend and retract relative to the wheel frame 100, the second elastic member 420 is arranged on the wheel frame 100 and enables the front lock pin 410 to have a tendency of extending, the front universal wheel 200 is provided with a front lock hole 210, and when the front lock pin 410 extends, the front lock pin 410 can be inserted into the front lock hole 210 and can be used for positioning the advancing direction of the front universal wheel 200; the front trigger 600 and the front lock pin 410 are connected through the first linkage 430, and when the touch part 810 pushes the front trigger 600 to move and compress the first elastic member 601, the front lock pin 410 can extend out relative to the wheel frame 100 through the second elastic member 420; when the touching portion 810 deviates from the front trigger 600 to reset the front trigger 600, the front trigger 600 can drive the front lock pin 410 to move through the first linking member 430, so that the front lock pin 410 retracts relative to the wheel frame 100.

When the touch part 810 does not touch the front trigger 600, the front trigger 600 is reset by the first elastic member 601, and pulls the front lock pin 410 to move in the retraction direction by the first link member 430, and compresses the second elastic member 420; when the touching part 810 touches the front trigger 600, the front trigger 600 is passively displaced so that the front lock pin 410 obtains an activity space, and the front lock pin 410 protrudes through the second elastic member 420. When the front lock pin 410 is extended, the front lock pin 410 can be engaged with the front lock hole 210 of the front universal wheel 200 after being aligned with the front lock hole, thereby positioning the traveling direction of the front universal wheel 200. In the embodiment, the front lock hole 210 is disposed on the wheel seat, and the axial direction of the hole is parallel to the wheel axle. In this embodiment, the first elastic member 601 is configured to release the elastic force of the compression enough to make the front lock pin 410 retract and compress the second elastic member 420, which can be realized by properly configuring the elastic modulus of the two elastic members. In this embodiment, the first elastic member 601 and the second elastic member 420 may be specifically springs.

In this embodiment, the wheel frame 100 is provided with a locking pin hole for the movement of the front locking pin 410, the front locking pin 410 is movably disposed in the locking pin hole, and the second elastic member 420 is disposed between the bottom of the locking pin hole and the front locking pin 410.

In this embodiment, the rear trigger 700 is movably connected to the wheel frame 100 along a predetermined direction, the wheel frame 100 is provided with a third elastic member 701 for resetting the rear trigger 700, and the touching portion 810 can push the rear trigger 700 to move and compress the third elastic member 701; the rear wheel alignment mechanism 500 includes a rear lock pin 510 and a fourth elastic member 520; the rear lock pin 510 is movably disposed on the wheel frame 100 and can extend and retract relative to the wheel frame 100, the fourth elastic member 520 is disposed on the wheel frame 100 and enables the rear lock pin 510 to have a tendency of extending, the rear universal wheel 300 is provided with a rear lock hole 310, and when the rear lock pin 510 extends, the rear lock pin 510 can be inserted into the rear lock hole 310 and position the advancing direction of the rear universal wheel 300; the rear trigger 700 and the rear lock pin 510 are connected by a second linking member 530, and when the touching portion 810 pushes the rear trigger 700 to move and compress the third elastic member 701, the rear lock pin 510 can extend out relative to the wheel frame 100 through the fourth elastic member 520; when the touching portion 810 deviates from the rear trigger 700 to reset the rear trigger 700, the rear trigger 700 can drive the rear lock pin 510 to move through the second linking member 530, so that the rear lock pin 510 retracts relative to the wheel frame 100.

When the touch portion 810 does not touch the rear trigger 700, the rear trigger 700 is reset by the third elastic member 701, and pulls the rear lock pin 510 to move in the retracting direction by the second linking member 530, and compresses the fourth elastic member 520; when the touching part 810 touches the rear trigger 700, the rear trigger 700 is passively displaced so that the rear lock pin 510 obtains an active space, and the rear lock pin 510 protrudes through the fourth elastic member 520. When the rear lock pin 510 is extended, the rear lock pin 510 is aligned with the rear lock hole 310 of the rear universal wheel 300 and then engaged therewith, thereby positioning the traveling direction of the rear universal wheel 300. In the present embodiment, the rear locking hole 310 is disposed on the wheel seat, and the axial direction of the hole is parallel to the wheel axle. In this embodiment, the third elastic member 701 is configured to release the elastic force of the compression, which is enough to make the rear lock pin 510 retract to compress the fourth elastic member 520, and this can be achieved by properly configuring the elastic modulus of the two elastic members. In this embodiment, the third elastic member 701 and the fourth elastic member 520 may be specifically springs.

In this embodiment, the wheel carriage 100 is provided with a locking pin hole for the movement of the rear locking pin 510, the rear locking pin 510 is movably disposed in the locking pin hole, and the fourth elastic member 520 is disposed between the bottom of the locking pin hole and the rear locking pin 510.

In this embodiment, the hand pushing frame 800 is provided with a joint seat 820, the hand pushing frame 800 is rotatably connected with the wheel frame 100 through the joint seat 820, the touching part 810 comprises two protrusion parts 811 arranged on the peripheral surface of the joint seat 820, and the two protrusion parts 811 correspond to the front trigger 600 and the rear trigger 700 respectively. By adopting the structure, the structure is simple and visual, and the maintenance is convenient.

In the present embodiment, the first linking member 430 and the second linking member 530 are pull wires.

In this embodiment, the wheel carriage 100 is provided with a front sliding groove 110 and a rear sliding groove 120, the front trigger 600 and the rear trigger 700 are slidably disposed in the front sliding groove 110 and the rear sliding groove 120, respectively, the wheel carriage 100 is provided with a front cover 130 and a rear cover 140 covering the notches of the front sliding groove 110 and the rear sliding groove 120, respectively, and the front cover 130 and the rear cover 140 are detachably disposed. The structure can facilitate the installation and the maintenance of the front trigger piece 600 and the rear trigger piece 700. In this embodiment, the moving direction of the front trigger 600 and the rear trigger 700 in the corresponding sliding grooves is the predetermined moving direction of the front trigger 600 and the rear trigger 700.

Referring to fig. 14, the present embodiment further includes a locking mechanism for positioning the position of the hand truck 800 with respect to the wheel carriage 100; the locking mechanism comprises a first engaging groove 910, a second engaging groove 920, a locking block 930, a fifth elastic member 940 and an unlocking mechanism; the first engaging groove 910 is disposed on the handle frame 800, the second engaging groove 920 is disposed on the wheel frame 100, the first engaging groove 910 and the second engaging groove 920 surround to form a movable cavity, the fixture block 930 is movably disposed in the movable cavity, the fixture block 930 can be simultaneously engaged with the first engaging groove 910 and the second engaging groove 920 and can limit the handle frame 800 to rotate relative to the wheel frame 100, the fifth elastic element 940 is used for enabling the fixture block 930 to be reset to a position where the fixture block is simultaneously engaged with the first engaging groove 910 and the second engaging groove 920, and the unlocking mechanism is connected with the fixture block 930 and is used for driving the fixture block 930 to move, so that the fixture block 930 can be disengaged from the first engaging groove 910 or the second engaging groove 920. In the present embodiment, the first engaging groove 910 and the second engaging groove 920 are gear-shaped cavities, and the engaging block 930 is a gear structure. The hand pushing frame 800 can be stable relative to the wheel frame 100 by arranging the locking mechanism; when the handle holder 800 needs to be rotated, the locking mechanism can be unlocked by the unlocking mechanism. In this embodiment, the fifth elastic member 940 may employ a spring.

Referring to fig. 1, 14 and 15, in the present embodiment, the unlocking mechanism includes an axial moving member 951, a radial moving member 952, and an operating mechanism 953; the axial moving member 951 is movably arranged on the push bench 800 and can move axially along the rotation axis of the push bench 800, the radial moving member 952 is movably arranged on the axial moving member 951 and can move radially along the rotation axis of the push bench 800, when the radial moving member 952 moves radially, the radial moving member 952 moves axially by being linked with the axial moving member 951 through a linkage mechanism, the axial moving member 951 is provided with a pushing part 9511 for pushing the fixture block 930, and the operating mechanism 953 is connected with the radial moving member 952 and used for driving the radial moving member 952 to move. In this embodiment, the linkage mechanism includes a first ramp portion 9521 disposed on the radial movable member 952 and a second ramp portion 9512 disposed on the axial movable member 951, and the first ramp portion 9521 and the second ramp portion 9512 are matched and can slide relative to each other. In other embodiments, the linkage mechanism may also adopt other suitable structures, and may be specifically configured according to actual conditions.

In this embodiment, the operating mechanism 953 includes a handle member and a pull wire, the handle member is movably disposed on the handle frame 800, the handle member is connected to the radial moving member 952 through the pull wire, and when the handle member moves, the radial moving member 952 is pulled through the pull wire. Of course, in other embodiments, the operating mechanism 953 may have other configurations and is not limited to the embodiment of the present embodiment.

When the radial moving member 952 moves radially, as shown in fig. 16, the radial moving member 952 drives the axial moving member 951 to move axially through the link mechanism, the axial moving member 951 pushes the fixture block 930 through the pushing portion 9511, and the fixture block 930 is disengaged from the first fixture groove 910, as shown in fig. 17, so that the hand pushing frame 800 can rotate relative to the wheel frame 100. Of course, in some embodiments, the latch 930 may also be disengaged from the second latch groove 920, which also can achieve the unlocking function.

In this embodiment, the axial moving member 951 and the radial moving member 952 can rotate together with the handle holder 800, the latching portion 931 is disposed on the latching block 930, the latching engagement portion 9522 is disposed on the radial moving member 952, and when the handle holder 800 rotates relative to the wheel frame 100 to switch positions, the latching portion 931 and the latching engagement portion 9522 can engage with each other and lock the radial position of the radial moving member 952, so that the latching block 930 is maintained in a state of being disengaged from the first engaging groove 910 or the second engaging groove 920. By providing the locking portion 931 and the locking engagement portion 9522, the radial position of the radial movable member 952 can be locked, so that the position of the radial movable member 952 does not need to be always maintained by the operating mechanism 953, and the operation is convenient.

In this embodiment, the two sides of the latching portion 931 are provided with a position-giving portion, and when the radial moving member 952 moves to a position corresponding to the position-giving portion, the radial moving member 952 can be reset, so that the latching block 930 can be reset to a position where it is simultaneously engaged with the first latching groove 910 and the second latching groove 920. When the radial moving element 952 corresponds to one of the yielding portions (as shown in fig. 15 and 16), the handle holder 800 is located at a position close to one side of the rear universal wheel 300, the radial moving element 952 can radially move into the yielding portion to unlock the locking mechanism, and the radial moving element 952 can also be reset at the position to enable the locking mechanism to position the handle holder 800 and the wheel carrier 100. When radial moving member 952 corresponds to another relief portion (as shown in fig. 19), and the handle holder 800 is located at a position close to one side of the front universal wheel 200, radial moving member 952 can be reset and radially moved at this position, so that the locking mechanism can be locked or unlocked.

In this embodiment, be provided with the jack on the axial moving part 951, be provided with the traveller on the handle frame 800, traveller and jack sliding connection to axial moving part 951 can realize the axial activity, and simultaneously, can drive axial moving part 951 when handle frame 800 rotates and rotate. In this embodiment, set up the spout on the axial moving part 951, radial moving part 952 slides and sets up in this spout, and the spout is radial to be extended to can realize the radial activity of radial moving part 952, simultaneously, axial moving part 951 rotates the time, also can drive radial moving part 952 through the spout and rotate. In this embodiment, the fifth elastic element 940 presses the latch 930, the axial moving element 951 and the radial moving element 952 against the handle pushing frame 800.

In this embodiment, the locking portion 931 is an arc-shaped strip, the locking engagement portion 9522 is an arc-shaped groove adapted to the arc-shaped strip, two ends of the arc-shaped groove are open, and the arc-shaped strip can rotate into the arc-shaped groove. Of course, in other embodiments, the latch 931 and the latch mating portion 9522 may have other suitable configurations.

A stroller comprising the above-described universal wheel positioning conversion mechanism. Due to the adoption of the universal wheel positioning and switching mechanism, the structure for switching the advancing direction is simple, the implementation is easy, and the use is convenient.

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.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (10)

1. A universal wheel positioning conversion mechanism, comprising:

a wheel carrier (100);

a front universal wheel (200) provided to the wheel carrier (100);

a rear universal wheel (300) provided to the wheel carrier (100);

a front wheel positioning mechanism (400) provided to the wheel carrier (100) and configured to position the front universal wheel (200) such that the front universal wheel (200) maintains a fixed traveling direction;

a rear wheel positioning mechanism (500) provided to the wheel carrier (100) and configured to position the rear universal wheel (300) such that the rear universal wheel (300) maintains a fixed traveling direction;

the front trigger piece (600) is movably arranged on the wheel carrier (100), and the front trigger piece (600) is connected with the front wheel positioning mechanism (400) and is used for controlling the front wheel positioning mechanism (400) to act;

the rear trigger piece (700) is movably arranged on the wheel carrier (100), and the rear trigger piece (700) is connected with the rear wheel positioning mechanism (500) and is used for controlling the rear wheel positioning mechanism (500) to act;

the pushing arm frame (800) is rotatably arranged on the wheel frame (100), a touching part (810) is arranged on the pushing arm frame (800), and when the pushing arm frame (800) rotates from one side close to the front universal wheel (200) to a position close to one side of the rear universal wheel (300), the touching part (810) can respectively touch the front trigger (600) and the rear trigger (700); when the touch part (810) touches the front trigger (600), the front wheel positioning mechanism (400) positions the advancing direction of the front universal wheel (200); when the touching part (810) touches the rear trigger (700), the rear wheel positioning mechanism (500) positions the traveling direction of the rear universal wheel (300).

2. The universal wheel positioning conversion mechanism of claim 1,

the front trigger (600) is movably connected to the wheel carrier (100) along a predetermined direction, a first elastic member (601) for resetting the front trigger (600) is arranged on the wheel carrier (100), and the touch part (810) can push the front trigger (600) to move and compress the first elastic member (601);

the front wheel positioning mechanism (400) comprises a front lock pin (410) and a second elastic piece (420); the front lock pin (410) is movably arranged on the wheel carrier (100) and can stretch and retract relative to the wheel carrier (100), the second elastic piece (420) is arranged on the wheel carrier (100) and enables the front lock pin (410) to have a stretching trend, a front lock hole (210) is arranged on the front universal wheel (200), and when the front lock pin (410) stretches out, the front lock pin (410) can be inserted into the front lock hole (210) and can be used for positioning the advancing direction of the front universal wheel (200); wherein,

the front trigger (600) and the front lock pin (410) are connected through a first linkage member (430), and when the touching part (810) pushes the front trigger (600) to move and compress the first elastic member (601), the front lock pin (410) can extend relative to the wheel carrier (100) through the second elastic member (420); when the touching part (810) deviates from the front trigger (600) to reset the front trigger (600), the front trigger (600) can drive the front lock pin (410) to move through the first linkage part (430), so that the front lock pin (410) retracts relative to the wheel frame (100).

3. The universal wheel positioning conversion mechanism of claim 2,

the rear trigger (700) is movably connected to the wheel carrier (100) along a predetermined direction, a third elastic member (701) for resetting the rear trigger (700) is arranged on the wheel carrier (100), and the touch part (810) can push the rear trigger (700) to move and compress the third elastic member (701);

the rear wheel positioning mechanism (500) comprises a rear lock pin (510) and a fourth elastic piece (520); the rear lock pin (510) is movably arranged on the wheel carrier (100) and can extend and retract relative to the wheel carrier (100), the fourth elastic piece (520) is arranged on the wheel carrier (100) and enables the rear lock pin (510) to have a stretching trend, a rear lock hole (310) is formed in the rear universal wheel (300), and when the rear lock pin (510) stretches out, the rear lock pin (510) can be inserted into the rear lock hole (310) and can be used for positioning the advancing direction of the rear universal wheel (300); wherein,

the rear trigger (700) is connected with the rear lock pin (510) through a second linkage (530), and when the touching part (810) pushes the rear trigger (700) to move and compress the third elastic member (701), the rear lock pin (510) can extend out relative to the wheel carrier (100) through the fourth elastic member (520); when the touching portion (810) deviates from the rear trigger (700) to reset the rear trigger (700), the rear trigger (700) can drive the rear lock pin (510) to move through the second linking member (530), so that the rear lock pin (510) retracts relative to the wheel carrier (100).

4. The universal wheel positioning and switching mechanism according to claim 3, wherein the hand pushing frame (800) is provided with a joint base (820), the hand pushing frame (800) is rotatably connected with the wheel carrier (100) through the joint base (820), the touching part (810) comprises two convex parts (811) arranged on the peripheral surface of the joint base (820), and the two convex parts (811) respectively correspond to the front trigger (600) and the rear trigger (700).

5. The universal wheel positioning conversion mechanism according to claim 3, wherein the first linkage member (430) and the second linkage member (530) are pull wires.

6. The universal wheel positioning and switching mechanism according to claim 3, wherein the wheel frame (100) is provided with a front sliding groove (110) and a rear sliding groove (120), the front trigger (600) and the rear trigger (700) are respectively slidably arranged in the front sliding groove (110) and the rear sliding groove (120), the wheel frame (100) is provided with a front cover (130) and a rear cover (140) which respectively cover the notches of the front sliding groove (110) and the rear sliding groove (120), and the front cover (130) and the rear cover (140) are detachably arranged.

7. The universal wheel positioning conversion mechanism according to claim 1, further comprising a locking mechanism for positioning the position of the hand truck (800) relative to the wheel truck (100); the locking mechanism comprises a first clamping groove (910), a second clamping groove (920), a clamping block (930), a fifth elastic element (940) and an unlocking mechanism; wherein the first engaging groove (910) is provided in the handle frame (800), the second engaging groove (920) is provided in the wheel frame (100), the first clamping groove (910) and the second clamping groove (920) enclose to form a movable cavity, the clamping block (930) is movably arranged in the movable cavity, the clamping block (930) can be simultaneously clamped and matched with the first clamping groove (910) and the second clamping groove (920) and limits the hand pushing frame (800) to rotate relative to the wheel frame (100), the fifth elastic member (940) is used for enabling the fixture block (930) to be reset to a position where the fixture block is matched with the first clamping groove (910) and the second clamping groove (920) at the same time, the unlocking mechanism is connected with the fixture block (930) and is used for driving the fixture block (930) to move, so that the latch (930) can be disengaged from the first latch groove (910) or the second latch groove (920).

8. The universal wheel positioning conversion mechanism according to claim 7, wherein said unlocking mechanism comprises an axially movable member (951), a radially movable member (952), and an operating mechanism (953); wherein, axial moving part (951) activity set up in shallow frame (800) and can follow the axial activity of the rotation axis of shallow frame (800), radial moving part (952) activity set up in axial moving part (951) and can follow the radial activity of the rotation axis of shallow frame (800), when radial moving part (952) radial activity, radial moving part (952) links through link gear axial moving part (951) axial activity, be provided with on axial moving part (951) and be used for the top to push away portion (9511) that pushes away of fixture block (930), operating device (953) with radial moving part (952) are connected and are used for the drive radial moving part (952) activity.

9. The universal wheel positioning and converting mechanism according to claim 8, wherein the axially movable member (951) and the radially movable member (952) are capable of rotating together with the hand rack (800), the latching portion (931) is disposed on the latching block (930), the radially movable member (952) is provided with a latching engagement portion (9522), and when the hand rack (800) rotates relative to the wheel rack (100) to switch positions, the latching portion (931) and the latching engagement portion (9522) are capable of engaging with each other and locking a radial position of the radially movable member (952), so that the latching block (930) is maintained in a state of being disengaged from the first engaging groove (910) or the second engaging groove (920); the two sides of the locking portion (931) are provided with a relief portion, and when the radial moving piece (952) moves to a position corresponding to the relief portion, the radial moving piece (952) can reset, so that the clamping block (930) can reset to a position matched with the first clamping groove (910) and the second clamping groove (920) at the same time.

10. A stroller comprising the universal wheel positioning conversion mechanism of any of claims 1 to 9.

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