CN212828621U - Seat support and handcart - Google Patents

Abstract

The utility model discloses a seat bracket and a handcart, which comprises a first chair frame rod and a second chair frame rod which can rotate relative to an articulated element, and also comprises a locking piece; the seat support includes at least a locked state and an unlocked state. When the chair frame is in a locking state, an overlapping area along the extension direction of the rod exists at the joint of the first rod of the chair frame and the second rod of the chair frame, the first position and the second position exist in the overlapping area, the hinge piece is arranged at the first position, the locking piece is arranged at the second position, and the first rod of the chair frame and the second rod of the chair frame are locked through the locking piece and are unfolded and fixed to form a support frame structure; when the chair frame is unlocked, the second rod of the chair frame is separated from the locking piece, and the first rod of the chair frame rotates around the hinge piece relative to the second rod of the chair frame and is folded. The seat support can be unfolded and folded, and locked and unlocked through a locking piece. So make things convenient for accomodating of seat support, the space that the seat support took up when reducing to accomodate. The latch member is capable of holding the seat support stationary after the seat support is deployed.

Description

Seat support and handcart

Technical Field

The utility model relates to a technical field of transport means especially relates to a seat support and handcart.

Background

With the development of society, people pay more and more attention to infant products, and people often consider the convenience of operation when selecting.

The prior stroller frame product with a cradle, a stroller seat or a seat support has a main frame and a seat support mounted on the main frame. A common seat support adopts a detachable mode, and the seat support is detached and separated independently and then placed in the process of storage. So the operation is inconvenient for storage and storage. Although the seat support can be folded by arranging the rotary joint in some stroller support products, the seat support is easy to loosen after being unfolded, and the fixing effect is not ideal.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a convenient seat support and handcart of accomodating and difficult not hard up.

The technical scheme of the utility model provides a seat support, which comprises a first chair frame rod and a second chair frame rod which can rotate relative to an articulated element, and a locking piece; the seat support includes at least a locked state and an unlocked state: when the chair frame is in the locking state, an overlapping area along the extension direction of the rod exists at the joint of the first rod of the chair frame and the second rod of the chair frame, a first position and a second position exist in the overlapping area, the hinge piece is arranged at the first position, the locking piece is arranged at the second position, and the first rod of the chair frame and the second rod of the chair frame are locked through the locking piece and are unfolded and fixed to form a support frame structure; when the chair frame is in the unlocking state, the second rod of the chair frame is separated from the locking piece, and the first rod of the chair frame rotates around the hinged piece and is folded relative to the second rod of the chair frame.

Further, the locking piece comprises a first slideway and a second slideway which are arranged in parallel; the first slideway is arranged on the first rod of the chair frame in a sliding manner; the tip of chair frame second pole can follow the second slide slips into the roll-off, during locking state the chair frame second pole slip into the second slide and with the chair frame first pole relatively fixed, during unlocking state the chair frame second pole roll-off second slide breaks away from the locking piece.

Furthermore, the seat support further comprises an elastic piece, and the elastic piece is arranged between the first rod of the seat frame and the locking piece, so that the second rod of the seat frame is kept not to fall off in the second slide way under the action of the elastic piece in the locking state; when the chair frame needs to be unlocked, the locking piece is pulled, and after the elastic piece is compressed, the locking piece slides, so that the end part of the second rod of the chair frame is moved out of the second slide way.

Furthermore, a guide block is arranged on the first rod of the chair frame, a guide groove with an opening facing the guide block is formed in the locking piece, and the elastic piece is connected between the guide block and the groove bottom of the guide groove.

Furthermore, the second rod comprises a rod part and a connecting seat, the rod part is fixedly connected with the connecting seat, the hinged part is arranged on the connecting seat, and the end part of the first rod of the chair frame is rotatably connected with the connecting seat through the hinged part.

Furthermore, the hinged part is a connecting seat, the first chair frame rod and the second chair frame rod are two U-shaped rods, and when the chair is in a locking state, the openings of the first chair frame rod and the second chair frame rod are oppositely arranged and fixed to form an O-shaped frame.

The technical scheme of the utility model a handcart, including main body frame and any one of the aforesaid seat support, chair frame second pole with main body frame fixed connection or detachable connection or an organic whole.

Furthermore, a clamping piece is arranged on the main body frame, and the second rod of the chair frame is clamped into the clamping piece.

Furthermore, the main body frame is provided with a front wheel bracket, a rear wheel bracket and a push rod bracket, and also comprises at least one rotary joint which enables the front wheel bracket, the rear wheel bracket and the push rod bracket to be foldable at least between the two brackets.

Further, the clip is arranged on the inner side of the rotary joint.

After adopting above-mentioned technical scheme, have following beneficial effect:

the seat support can be unfolded and folded, and locked and unlocked through a locking piece. So make things convenient for accomodating of seat support, the space that the seat support took up when reducing to accomodate. The locking piece can keep the seat support fixed after the seat support is unfolded, and the fixing effect is good.

And install the handcart of this seat support, convenient storage, stable in structure during the use is difficult for the pine to take off.

Drawings

The disclosure of the present invention will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. In the figure:

fig. 1 is a perspective view of a seat support in a locked state according to an embodiment of the present invention;

fig. 2 is a perspective view of an unlocked state of the seat support according to an embodiment of the present invention;

FIG. 3 is an exploded view of a seat support according to an embodiment of the present invention;

FIG. 4 is a schematic view of a locking member and guide block in accordance with an embodiment of the present invention;

fig. 5 is a perspective view of a locking member according to an embodiment of the present invention;

fig. 6 is a perspective view of the cart according to an embodiment of the present invention;

fig. 7 is a schematic view of a rotary joint and a rotary plate according to an embodiment of the present invention.

Reference symbol comparison table:

a cart 10;

main body frame 1:

front wheel bracket 11 front wheel bracket cross member 111 front wheel bracket side member 112

Rear wheel carrier 12 rear wheel carrier cross member 121 rear wheel carrier side member 122

Push rod bracket 13 push rod bracket cross beam 131 push rod bracket side beam 132;

the seat support 2:

second longitudinal beam 211 of second rod 21 of chair frame and second transverse beam 212 of chair frame connecting seat 213

First longitudinal beam 221 and first frame cross beam 222 of first frame rod 22

Guide block 2211 connects columns 2212;

the locking member 3:

elastic member 321 of guide groove 32 of second slide way 31

First slideway 33

A hinge 4;

a fastener 5;

the rotating joint 6:

gear teeth 612 of sliding groove 611 of rotating plate 61

Rotating joint housing 62 rotating gear 621

Inner shell 63 of rotary joint

Detailed Description

The following describes the present invention with reference to the accompanying drawings.

It is easily understood that, according to the technical solution of the present invention, a plurality of structural modes and implementation modes that can be mutually replaced by those of ordinary skill in the art can be achieved without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are only exemplary illustrations of the technical solutions of the present invention, and should not be construed as limiting or restricting the technical solutions of the present invention in its entirety or as a limitation of the present invention.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.

In one embodiment of the present invention, as shown in fig. 1-3 and 6, a seat support 2 includes a first rod 22 and a second rod 21, which can rotate relative to an articulated member 4, and a locking member 3.

The seat support 2 comprises at least a locked state and an unlocked state:

in the locked state, an overlapping region along the extending direction of the rod exists at the joint of the first chair frame rod 22 and the second chair frame rod 21, the first position and the second position exist in the overlapping region, the hinge piece 4 is arranged at the first position, the locking piece 3 is arranged at the second position, and the first chair frame rod 22 and the second chair frame rod 21 are locked through the locking piece 3 and are unfolded and fixed to form a support frame structure.

In the unlocked state, the second frame lever 21 is separated from the lock member 3, and the first frame lever 22 is rotated and folded about the hinge 4 with respect to the second frame lever 21.

In this embodiment, the seat support 2 is mounted on a trolley 10 for carrying a seat. Such as a stroller, the seat support 2 mounts a removable infant seat.

Alternatively, the seat support 2 may be mounted on a child carrier such as a child-mounted seat and a dining chair for mounting a baby seat, a seat cushion, or the like.

As shown in fig. 1 to 3, the seat frame 2 has a frame first bar 22 and a frame second bar 21, and the frame first bar 22 is located above or below the frame second bar 21. In the up-down direction, the first frame rod 22 and the second frame rod 21 have an overlapping region. In which a first position and a second position are provided in the overlap region, in which the joint 4 is provided, the first frame lever 22 is articulated on the joint 4 so as to be able to pivot about the joint 4. A lock 3 is provided at the second position, and the first frame lever 22 and the second frame lever 21 can be locked and unlocked by sliding the lock 3.

The seat frame 2 has a locked state and an unlocked state, and when the seat frame 2 is used, the seat frame first lever 22 is rotated to unfold the seat frame 2 to the position of fig. 1. The slide lock 3 then fixes the first frame rod 22 and the second frame rod 21. Thus, the seat support 2 is in the locked state, and the first frame rod 22 and the second frame rod 21 are prevented from being shaken. After the seat frame 2 is used, the lock member 3 may be slid to separate the lock member 3 from the second frame lever 21 so that the seat frame 2 is in the unlocked state, and then the first frame lever 22 may be rotated so that the seat frame 2 is folded to the position of fig. 3. Thereby reducing the occupied space and facilitating the storage.

Preferably, as shown in fig. 3-5, the blocking member 3 comprises a first slideway 33 and a second slideway 31 arranged in parallel. The first slide 33 is slidably disposed on the first frame rod 22. The end of the second rod 21 can slide in and out along the second slide way 31, and in the locked state, the second rod 21 slides in the second slide way 31 and is fixed relative to the first rod 22. In the unlocked state, the second rod 21 slides out of the second slide 31 and disengages the lock member 4.

First slide 33 extends through locking member 3, and frame first rod 22 extends into first slide 33 to be in clearance fit with first slide 33, so that locking member 3 can slide along frame first rod 22. The second slide 31 is a fitting groove opened toward the end of the second lever 21 of the frame. When the lock member 3 slides on the first frame lever 22, the second frame lever 21 can be inserted into the second slide passage 31 or separated from the second slide passage 31.

Specifically, as shown in fig. 1 to 5, the seat support 2 is composed of two parts, a first frame rod 22 and a second frame rod 21. The first chair frame rod 22 includes a first cross member 222 and two first longitudinal members 221, and the two first longitudinal members 221 are connected to left and right sides of the first cross member 222, respectively, and extend toward the second chair frame rod 21. The second frame rod 21 includes a second cross member 212 and two second longitudinal members 211, and the two second longitudinal members 211 are connected to left and right ends of the second cross member 212, respectively, and extend toward the first frame rod 22. A hinge 4 is connected to each of the two second longitudinal beams 211. The two first longitudinal beams 221 are respectively hinged to the two hinges 4. Two first longitudinal beams 221 are respectively connected with a locking piece 3, and the first longitudinal beams 221 are inserted into the first slide way 33, so that the locking pieces 3 are sleeved on the first longitudinal beams 221.

In the present embodiment, the first longitudinal beam 221 is located above the second longitudinal beam 211, there is an overlapping area between the first longitudinal beam 221 and the second longitudinal beam 211, and the first slideway 33 is located above the second slideway 31.

The locking member 3 is used specifically by sliding the locking member 3 in a direction approaching the second frame rod 21 when the first frame rod 22 is rotated to be parallel to the second frame rod 21, so that the second longitudinal beam 211 is inserted into the second slide channel 31. So that the frame first lever 22 and the frame second lever 21 are kept fixed, and thus the seat frame 2 is in the locked state. When unlocking is then required, locking member 3 is slid away from frame second lever 21, so that second longitudinal member 211 is disengaged from second slide 31, and thus seat support 2 is in the unlocked state, so that frame first lever 22 can be rotated again, and seat support 2 can be folded. The operation of whole lock piece 3 is convenient simple, and lock piece 3 simple structure is convenient for produce moreover, has reduced manufacturing cost.

Preferably, as shown in fig. 3 to 5, the seat support 2 further includes an elastic member 321, and the elastic member 321 is disposed between the first frame lever 22 and the locking member 3, so that the second frame lever 21 is kept from falling off within the second slide channel 31 in the locked state by the elastic member 321. When unlocking is required, the locking piece 3 is pulled, the elastic piece 321 is compressed, and then the locking piece 3 slides, so that the end part of the second rod 21 of the chair frame moves out of the second slide rail 31.

Specifically, one end of the elastic member 321 is connected to the first rod 22 of the seat frame, and the other end is connected to the locking member 3. When the seat frame 2 is in the locked state, the end of the frame second rod 21 is inserted into the second slide 31, and the elastic member 321 applies a force to the locking member 3 toward the frame second rod 21, so that the frame second rod 21 is not easily separated from the second slide 31. When the second rod 21 of the chair frame needs to be separated from the second slide, the dragging locking member 3 slides in a direction away from the second rod 21 of the chair frame, and at this time, the elastic member 321 compresses. When the second rod 21 of the chair frame is separated from the second slide way 31, the locking piece 3 is released, and the locking piece 3 slides under the action of the elastic piece 321 to return to the initial position. So set up for locking piece 3 can automatic re-setting, conveniently operates locking piece 3.

Optionally, the elastic member 321 is a return spring.

Preferably, as shown in fig. 4 to 5, the first lever 22 of the chair frame is provided with a guide block 2211, the locking member 3 is provided with a guide groove 32 opened toward the guide block 2211, and an elastic member 321 is connected between the guide block 2211 and the bottom of the guide groove 32.

Specifically, the guide groove 32 communicates with the first slide passage 33, and the guide block 2211 is in clearance fit with the guide groove 32, so that the guide block 2211 can slide relative to the guide groove 32. The guide block 2211 cooperates with the guide groove 32 to define the sliding track of the lock member 3, so that the lock member 3 can be slid more conveniently and the lock member 3 is prevented from rotating left and right on the first lever 22 of the chair frame.

As shown in fig. 4, an elastic member 321 is connected between the guide block 2211 and the groove bottom of the guide groove 32. The elastic member 321 has one end connected to the guide block 2211 and the other end connected to the bottom of the guide groove 32. When the lock member 3 is pulled to slide in a direction away from the second lever 21 of the seat frame, the distance between the guide block 2211 and the groove bottom of the guide groove 32 is shortened, and at this time, the elastic member 321 is compressed. When the lock member 3 is released, the elastic member 321 expands to push the lock member 3 to slide to the initial position in a direction approaching the second lever 21 of the seat frame. So set up and make locking piece 3 can automatic re-setting, convenience of customers operation. Preferably, as shown in fig. 4, the guide block 2211 is provided with a connection column 2212 extending toward the guide groove 32, and at least a portion of the elastic member 321 is fitted over the connection column 2212. The position of the elastic member 321 is limited by the connecting column 2212, and the situation that the position of the elastic member 321 is changed when the elastic member is impacted and the like, so that the reset effect is lost is avoided.

Preferably, as shown in fig. 1 to 3, the second rod 21 of the frame includes a rod portion fixedly connected to the connecting seat 213, and a connecting seat 213, the hinge 4 is disposed on the connecting seat 213, and an end of the first rod 22 of the frame is rotatably connected to the connecting seat 213 through the hinge 4.

The rod part is a second longitudinal beam 211, and the connecting seat 213 is detachably connected to the second longitudinal beam 211. Alternatively, the connecting base 213 is provided with a mounting hole through which the frame second rod 21 passes, so that the hinge 4 is fitted over the frame second rod 21. Of course, the connection between the connection base 213 and the second longitudinal beam 211 is not limited to this type of connection, as long as the hinge 4 can be connected to the second frame rod 21 and disconnected from the second frame rod 21.

Two pivoting plates are arranged on the connecting seat 213 at intervals, the first longitudinal beam 221 of the first chair frame rod 22 is located between the two pivoting plates, and then the hinge element 4 penetrates through the first longitudinal beam 221 and the two pivoting plates, so that the first chair frame rod 22 is hinged on the connecting seat 213.

Preferably, as shown in fig. 1-3, the first frame rod 22 and the second frame rod 21 are two U-shaped rods, and when in the locked state, the openings of the first frame rod 22 and the second frame rod 21 are oppositely disposed and fixed to form an O-shaped frame.

Specifically, the first seat frame lever 22 includes a first cross member 222 and two first longitudinal members 221, and the two first longitudinal members 221 are connected to both ends of the first cross member 222. The first cross member 222 and the two first longitudinal members 221 are connected to form a U-shape. The second frame bar 21 includes a second cross member 212 and two second longitudinal members 211, and the two second longitudinal members 211 are connected to both ends of the second cross member 212. The second cross member 212 and the two second longitudinal members 211 are connected to form a U-shape. The first longitudinal beam 221 is articulated to the second longitudinal beam 211 by means of an articulation 4. In the locked state, the U-shaped opening of the first frame bar 22 faces the second frame bar 21, and the U-shaped opening of the second frame bar 21 faces the first frame bar 22. The first frame rod 22 and the second frame rod 21 are integrally formed in an O-shape, so that the seat can be stably placed.

As shown in fig. 1-6, for the present invention, a stroller 10 comprises a main frame 1 and any one of the seat supports 2, and a second rod 21 of the seat support is fixedly connected or detachably connected or integrally connected with the main frame 1. This seat support 2 can expand and fold through locking piece 3, so make things convenient for accomodating of seat support 2, the space that seat support 2 occupy when reducing to accomodate. The seat support 2 has simple structure, good structural strength and difficult damage. And the lock 3 can fix the seat frame 2 from shaking when the seat frame 2 is unfolded.

For the specific structure of the seat frame 2, reference is made to the related description in the foregoing, and the description is omitted here.

The seat frame second bar 21 is connected to the main body frame 1 so that the seat holder 2 is mounted on the main body frame 1. Wherein, the second rod 21 of the chair frame and the main body frame 1 can be fixed on the main body frame 1 through bolts; or the main body frame 1 is provided with the clamping piece 5, and the chair frame second rod 21 is clamped in the clamping piece 5 and detachably connected with the main body frame 1, so that the seat support 2 is convenient to mount and dismount; or the second rod 21 of the chair frame is integrally formed with the main body frame 1 by electric welding, so that the connection between the two is firmer.

Preferably, as shown in fig. 6 and 7, the main body frame 1 is provided with a card member 5, and the frame second lever 21 is snapped into the card member 5. The latch 5 is a latching groove extending in the front-rear direction, and the frame second lever 21 is latched to the latching groove so that the frame second lever 21 is fixed to the main body frame 1. The mode of clamping the clamping piece 5 is adopted, so that the second rod 21 of the chair frame can be conveniently installed on the main body frame 1, and the second rod 21 of the chair frame can be conveniently detached.

Preferably, as shown in fig. 6 and 7, the main body frame 1 has a front wheel bracket 11, a rear wheel bracket 12, a push rod bracket 13, and at least one rotary joint 6 for making at least two of the front wheel bracket 11, the rear wheel bracket 12, and the push rod bracket 13 foldable.

The front wheel bracket 11 is used for mounting the front tires, the rear wheel bracket 12 is used for mounting the rear tires, and the push rod bracket 13 is used for the user to push the cart 10 by hand. The revolute joint 6 is used to connect together the front wheel carrier 11, the rear wheel carrier 12 and the push rod carrier 13. Two rotating plates 61 are rotatably connected to the rotating joint 6. Optionally, the rotating joint 6 is fixed on the rear wheel bracket 12, one rotating plate 61 is connected with the front wheel bracket 11, and the other rotating plate 61 is connected with the push rod bracket 13; or the rotating joint 6 is fixed on the front wheel bracket 11, one rotating plate 61 is connected with the rear wheel bracket 12, and the other rotating plate 61 is connected with the push rod bracket 13; or the rotating joint 6 is fixed on the push rod bracket 13, one rotating plate 61 is connected with the front wheel bracket 11, and the other rotating plate 61 is connected with the rear wheel bracket 12. The specific connection condition is determined according to the specific condition and is not limited herein.

How the rotating plate 61 rotates will now be described by taking a rotating joint 6 and a rotating plate 61 as an example.

The revolute joint 6 is composed of a revolute joint outer shell 62 and a revolute joint inner shell 63, wherein the revolute joint inner shell 63 is connected to the rear wheel support side member 12, and the revolute joint outer shell 62 is connected to the revolute joint inner shell 63. A rotary gear 621 is mounted in the rotary joint inner case 62. And a part of the rotating plate 61 is positioned inside the rotating joint 6 and the other part thereof protrudes outside the mounting 6. The portion located inside the revolute joint 6 is connected to the revolute joint inner case 63 by a mounting shaft. An arc-shaped sliding groove 611 is formed in the rotating plate 61, a plurality of gear teeth 612 are projected from a groove wall of the sliding groove 611, and the rotating gear 621 extends into the sliding groove 611 to mesh with the gear teeth 612. When the rotating plate 61 rotates, the gear teeth 612 mesh with the rotating gear 621, and stable rotation of the rotating plate 61 is achieved.

Of course, the manner in which the rotating plate 61 rotates in the rotating joint 6 is not limited to the above-described manner, as long as the rotating plate 61 can rotate.

Optionally, a clamping member is further disposed on the rotating joint 6, and when the rotating plate 61 rotates to a predetermined position, the clamping member is clamped with the rotating plate 61, so as to fix the rotating plate 61.

Preferably, as shown in fig. 6 and 7, the escapement 5 is disposed inside the revolute joint 6. The clamping piece 5 is convenient to mount, and the inner side of the rotating joint 6 also has a protection effect on the clamping piece 5.

Alternatively, the clip member 5 is integrally formed with the rotational joint 6.

As shown in fig. 1-7, is a preferred embodiment of the present invention. The direction of the head of the cart 10 is defined as forward for ease of description.

The stroller 10 is an infant product. Which has a main body frame 1 and a seat holder 2. The main body frame 1 includes a front wheel bracket 11, a rear wheel bracket 12, and a push rod bracket 13.

The front wheel frame 11 includes a front wheel frame cross member 111, and front wheel frame side members 112 extending obliquely upward and rearward are connected to the left and right sides of the front wheel frame cross member 111, respectively. Two front wheels of the cart are connected below the front wheel support cross beam 111 at intervals.

The rear wheel carrier 12 includes a rear wheel carrier cross member 121, and rear wheel carrier side members 122 extending upward and forward are connected to the left and right sides of the rear wheel carrier cross member 121, respectively. Two cart rear wheels arranged at intervals are connected below the rear wheel support cross beam 121.

The pushrod support 13 includes a pushrod support cross member 131, and pushrod support side members 132 inclined downward and forward are connected to left and right sides of the pushrod support cross member 131, respectively.

A rotary joint 6 is connected to the upper end of each rear wheel frame side beam 122, and two rotary plates 61 are rotatably connected to each rotary joint 6, one of the rotary plates 61 being connected to the front wheel frame side beam 112, and the other rotary plate 61 being connected to the push rod frame side beam 132. This allows the front wheel bracket 11 and the push rod bracket 13 to rotate with respect to the rear wheel bracket 12, thereby allowing the main body frame 1 to be folded and unfolded. For a specific way of rotating the rotating plate 61 on the rotating joint 6, reference is made to the related contents in the foregoing, and details are not described herein again.

The seat support 2 is located between the two revolute joints 6, and the seat support 2 comprises a first seat frame rod 22 and a second seat frame rod 21. The first frame bar 22 has a first cross member 222, and first longitudinal members 221 extending rearward are connected to the left and right sides of the first cross member 222. The second frame bar 21 has a second cross member 212, and second longitudinal members 211 extending forward are connected to the left and right sides of the second cross member 212, respectively.

The two second longitudinal beams 211 are respectively sleeved with a connecting seat 213, and the rear ends of the two first longitudinal beams 221 are respectively hinged to the connecting seats 213 through a hinge 4, so that the first seat frame 22 can rotate relative to the second seat frame 21, and the seat support 2 can be unfolded and folded.

The inner side of each rotating joint 6 is provided with a clamping piece 5 extending in the front-back direction, and the two second longitudinal beams 211 are respectively clamped in the clamping pieces 5, so that the seat support 2 is fixed on the main body frame 1.

The two first longitudinal beams 221 are respectively sleeved with a locking piece 3, the locking piece 3 is provided with a first slide way 33, a second slide way 31 with an opening facing the second longitudinal beam 211 is arranged below the first slide way 33, a guide groove 32 is arranged above the first slide way 33, and the guide groove 32 is communicated with the first slide way 33.

A guide block 2211 is arranged on the first longitudinal beam 221, and the first longitudinal beam 221 passes through the first slideway 33, so that the locking member 3 is sleeved on the first longitudinal beam 221, and the guide block 2211 is positioned in the guide groove 32.

An elastic member 321 is connected between the guide block 2211 and the bottom of the guide groove 32, a connecting post 2212 extending backward is connected to the guide block 2211, and the front end of the elastic member 321 is inverted on the connecting post 2212.

The seat frame 2 is used in a process in which, when it is necessary to unfold the seat frame 2, the first frame 22 is rotated forward, and then the lock member 3 is slid so that the second side member 211 is inserted into the second slide passage 31, thereby locking the seat frame 2 with the first frame rod 22 fixed to the second frame rod 21. When it is desired to fold seat frame 2, latch 3 is pulled so that second longitudinal member 211 disengages from second slide 31, and then frame first lever 22 is rotated rearward to fold over frame second lever 21. The lock member 3 is released while rotating, and the lock member 3 slides to the initial position by the pulling of the elastic member 321.

To sum up, the utility model discloses a seat support, including the first pole of chair frame and the chair frame second pole that can relatively rotate, still include locking piece and articulated elements. The seat support includes at least a locked state and an unlocked state: when the chair frame is in a locking state, an overlapping area along the extending direction of the rod exists at the joint of the first rod of the chair frame and the second rod of the chair frame, the first position and the second position exist in the overlapping area, the hinge piece is arranged at the first position, the locking piece is arranged at the second position, and the first rod of the chair frame and the second rod of the chair frame are locked through the locking piece and are unfolded and fixed. When the chair is unlocked, the second rod of the chair frame is separated from the locking piece, and the first rod of the chair frame rotates and folds around the hinge relative to the second rod of the chair frame. The locking piece can be when chair frame first pole and chair frame second pole expand, and is fixed with chair frame first pole and chair frame second pole, avoids it to rock.

The utility model discloses a handcart, including main body frame and seat support, chair frame second pole and main body frame fixed connection or detachable connection or an organic whole. This seat support can expand and fold through the locking piece to make things convenient for accomodating of handcart, reduce and accomodate the space. And the seat support is firm when using, the use handcart that makes the user can safe relieved.

What has been described above is merely the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principle of the present invention, several other modifications can be made, and the protection scope of the present invention should be considered.

Claims (10)

1. A seat support (2) comprising a first frame lever (22) and a second frame lever (21) rotatable relative to a hinge (4), and a latch (3);

the seat support (2) comprises at least a locked state and an unlocked state:

in the locking state, an overlapping area along the extension direction of the rod exists at the joint of the first chair frame rod (22) and the second chair frame rod (21), the first position and the second position exist in the overlapping area, the hinge piece (4) is arranged at the first position, the locking piece (3) is arranged at the second position, and the first chair frame rod (22) and the second chair frame rod (21) are locked through the locking piece (3) and are unfolded and fixed to form a support frame structure;

when the chair frame is in the unlocking state, the chair frame second rod (21) is separated from the locking piece (3), and the chair frame first rod (22) rotates around the hinged piece (4) relative to the chair frame second rod (21) and is folded.

2. Seat support (2) according to claim 1, characterized in that said blocking member (3) comprises a first slideway (33) and a second slideway (31) arranged in parallel;

the first slide way (33) is arranged on the first chair frame rod (22) in a sliding manner;

the end part of the second chair frame rod (21) can slide in and out along the second slide way (31), and the second chair frame rod (21) slides in the second slide way (31) and is relatively fixed with the first chair frame rod (22) in a locking state;

when the chair frame is in an unlocked state, the second rod (21) of the chair frame slides out of the second slide way (31) and is separated from the locking piece (3).

3. The seat support (2) according to claim 2, characterized in that the seat support (2) further comprises an elastic member (321), the elastic member (321) being arranged between the frame first rod (22) and the locking member (3) such that the frame second rod (21) remains unremoved within the second slideway (31) in the locked state under the action of the elastic member (321);

when the unlocking is needed, the locking piece (3) is pulled, after the elastic piece (321) is compressed, the locking piece (3) slides, and the end part of the chair frame second rod (21) is moved out of the second slide way (31).

4. The seat support (2) according to claim 3, wherein a guide block (2211) is provided on the first lever (22) of the seat frame, a guide groove (32) opened toward the guide block (2211) is provided on the lock member (3), and the elastic member (321) is connected between the guide block (2211) and a groove bottom of the guide groove (32).

5. The seat support (2) according to claim 1, wherein the frame second lever (21) comprises a lever portion and a connecting seat (213), the lever portion is fixedly connected with the connecting seat (213), the hinge (4) is disposed on the connecting seat (213), and an end portion of the frame first lever (22) is rotatably connected with the connecting seat (213) through the hinge (4).

6. The seat support (2) according to any one of claims 1 to 5, wherein the first frame bar (22) and the second frame bar (21) are two U-shaped bars, and when in the locked state, the openings of the first frame bar (22) and the second frame bar (21) are oppositely arranged and fixed to form an O-shaped frame.

7. A trolley (10) comprising a main frame (1) and a seat support (2) as claimed in any one of claims 1 to 5, the second bar (21) being fixedly connected or detachably connected or integrally connected to the main frame (1).

8. A trolley (10) as claimed in claim 7, characterized in that the main frame (1) is provided with a catch (5), into which catch (5) the frame second bar (21) is snapped in.

9. A trolley (10) as claimed in claim 8, characterized in that the body frame (1) has a front wheel carrier (11), a rear wheel carrier (12), a push rod carrier (13), and at least one swivel joint (6) that makes it possible to fold at least between the front wheel carrier (11), the rear wheel carrier (12) and the push rod carrier (13).

10. A trolley (10) as claimed in claim 9, characterized in that the clip (5) is arranged inside the swivel joint (6).

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