Trolley

Abstract

The utility model discloses a trolley, and belongs to the technical field of children products. The trolley comprises a trolley frame, a handle, a key and a clamping wheel, the frame is connected with the handle through a rotating joint; a wheel mounting position is arranged at the bottom of the frame, and the wheel assembly is mounted on the wheel mounting position; a turning tent a and a turning tent b are further arranged on the frame, the turning tent a and the turning tent b are both hinged to the inner side of the frame clamping ring of the rotating joint, a handle is arranged on the outer surface of one turning tent, and an inverted buckle is arranged on the other turning tent and buckled to the edge of the frame. Rotation of the locked wheel can be achieved, convenience and rapidness are achieved, and the position of the handlebar is conveniently adjusted through the rotating joint.

Description

Technical Field

[0001] The utility model relates to the technical field of children's products, in particular to a stroller. Background Art

[0002] Many children's play trolleys for storing small toys cannot stand firmly on the ground and are not easy to push or pull with handles, making them inconvenient to fix and move. Utility Model Content

[0003] The purpose of the present invention is to avoid the deficiencies in the above-mentioned background technology and to provide a small cart with an adjustable handle angle and lockable wheels.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A small cart comprises a frame and a handle, and also comprises a button and a card wheel; the frame and the handle are connected via a rotating joint; a wheel mounting position is provided on the bottom of the frame, and a wheel assembly is mounted on the wheel mounting position;

[0006] The rotary joint includes a frame clamp fixed to the frame and a handlebar connector at the end of the handlebar; the handlebar connector, the clamping wheel and the frame clamp are all located on the same central axis, wherein the handlebar connector and the frame clamp are both provided with circular grooves, and the two circular grooves are opposite to form a circular through cavity for the displacement of the clamping wheel;

[0007] The side wall of the clamping wheel is divided into two parts, one part of the circumference is a smooth curved surface, and the other part of the circumference is provided with a protrusion; the inner walls of the two circular grooves are provided with grooves that match the protrusions; a spring is provided between the bottom of one of the circular grooves and the clamping wheel;

[0008] The handle connector is provided with a through hole extending through the circular groove, and the button is located in the through hole and can move along the central axis;

[0009] At least one post is provided on the connection side of the button, and the post and the button are designed as an integrated whole; the post and the through hole correspond one to one, and the post passes through the corresponding through hole and abuts on the clamping wheel;

[0010] The end of the support column is provided with a bend for preventing it from falling off, and the bend is provided with a smooth inclined surface for easy embedding;

[0011] The frame is also provided with a flap a and a flap b, wherein the flap a and the flap b are hinged to the inner side of the frame clamp of the rotating joint, the outer surface of one of the flaps is provided with a handle, and the other flap is provided with an undercut, which is buckled on the edge of the frame.

[0012] Furthermore, the wheel assembly includes a wheel axle mounted on the frame, and the wheel axle is provided with a wheel member connected to a bearing;

[0013] The wheel component includes a knob and two interlocking wheel hubs;

[0014] The wheel axle includes an outer shaft and an inner shaft; the inner shaft is sleeved in the outer shaft, and the two are fixedly connected by screws, the two wheel hubs are sleeved outside the outer shaft and the central axes of the three coincide; a threaded shaft is provided on the central shaft of the knob, an internal thread is provided inside the inner shaft, and the threaded shaft passes through the outer hub and cooperates with the internal thread; a pressure ring is also sleeved on the outer shaft, and the pressure ring is located on the outside of the outer hub; a protrusion is provided on the outer surface of the pressure ring, and the extension edge of the protrusion passes through the inner shaft and abuts against the inner surface of the knob.

[0015] Furthermore, the inner shaft and the outer shaft are both sleeve structures, wherein the inner end of the outer shaft is connected to the frame, the outer end of the inner shaft is provided with an extension edge, and the extension edge is provided with a through hole for the protrusion to pass through.

[0016] Furthermore, the rotating joints are provided with two groups, which are respectively located on both sides of the frame; the handle is an arc-shaped rod bent 180 degrees, both ends of which are connected to the rotating joints, and the end of the handle is a handle connecting piece.

[0017] Furthermore, the flap a and the flap b are both arc-shaped surfaces.

[0018] Furthermore, there are four wheel mounting positions, two of which are used to mount wheel assemblies, and the other two are used to mount wheels.

[0019] Compared with the background technology, the present invention has the following beneficial effects:

[0020] 1) The utility model fixes the handlebar connector and the frame clamp through a clamping wheel. Pressing a button unlocks the handlebar connector and the frame clamp, thereby achieving relative rotation between the two.

[0021] 2) The utility model has a plurality of protrusions and circular grooves on the clamping wheel, which can have multiple rotation positions, simple structure, simple operation and convenient pushing and pulling.

[0022] 3) The utility model can lock the wheel only by turning a knob, which is simple, convenient and quick to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0024] Figure 2 yes Figure 1 Schematic diagram of the structure from another perspective;

[0025] Figure 3 It is a structural schematic diagram of a wheel assembly according to an embodiment of the present utility model.

[0026] Figure 4It is a cross-sectional schematic diagram of a wheel assembly according to an embodiment of the present utility model.

[0027] Figure 5 This is a simplified structural diagram of the wheel assembly knob of an embodiment of the present utility model;

[0028] Figure 6 It is a structural exploded diagram of the inner shaft and outer shaft of the wheel assembly according to an embodiment of the present invention.

[0029] Figure 7 This is a schematic structural diagram of the wheel assembly pressure ring according to an embodiment of the present utility model.

[0030] Figure 8 This is a schematic diagram of the matching structure of the inner shaft and outer shaft of the wheel assembly according to an embodiment of the present utility model.

[0031] Figure 9 This is a schematic diagram of the matching structure of the inner shaft, outer shaft and pressure ring of the wheel assembly according to an embodiment of the present utility model.

[0032] Figure 10 It is a structural schematic diagram of the rotary joint of an embodiment of the utility model.

[0033] Figure 11 It is a schematic diagram of the clamping wheel structure of the rotary joint in an embodiment of the utility model.

[0034] Figure 12 This is a simplified diagram of the key structure of the rotary joint in an embodiment of the utility model;

[0035] Figure 13 This is a simplified structural diagram of a frame clamp ring of a rotary joint according to an embodiment of the present utility model.

[0036] Figure 14 This is a schematic diagram of the inner structure of the handlebar connector of the rotary joint according to an embodiment of the present utility model.

[0037] Figure 15 This is a schematic diagram of the outer structure of the handlebar connector of the rotary joint according to an embodiment of the present utility model.

[0038] Figure 16 for Figure 2 A magnified view of

[0039] In the figure: I, frame, II, rotating joint, III, wheel assembly, IV, handlebar, V, flap a, VI, flap b, VII, wheel, 101, outer shaft; 102, inner hub; 104, outer hub; 103, contact ring; 105, inner shaft; 106, knob, 107, pressure ring, 1061, threaded shaft, 1062, bend, 1063, inclined surface, 1051, extension edge, 1052, through hole, 1071, protrusion; 1, button; 2, pin; 3, frame clamping ring; 4, clamping wheel; 5, handlebar connector; 4-1, protrusion, 4-2, smooth curved surface, 1-1, support column, 1-2, bend, 1-3, smooth inclined surface, 3-1, groove, 5-1, groove, 5-2, through hole, 5-3, button mounting position, 1024, undercut, 6, spring. DETAILED DESCRIPTION

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] Reference Figures 1 to 16 This embodiment includes a frame and a handle, and also includes a button and a card wheel; the frame and the handle are connected by a rotating joint; a wheel mounting position is provided on the bottom of the frame, and the wheel assembly is installed on the wheel mounting position;

[0042] The rotary joint includes a frame clamp and a handlebar connector; and is characterized in that it further includes a button and a clamping wheel; the handlebar connector, the clamping wheel and the frame clamp are all located on the same central axis, wherein the handlebar connector and the frame clamp are both provided with circular grooves, and the two circular grooves are opposite to form a circular through cavity for displacement of the clamping wheel;

[0043] The side wall of the clamping wheel is divided into two parts, one part has a smooth curved surface on the circumference, and the other part has a protrusion on the circumference; the inner walls of the two circular grooves are provided with grooves that match the protrusions; a spring is provided between the bottom of one of the circular grooves and the clamping wheel;

[0044] The handle connector is provided with a through hole extending through the circular groove, and the button is located in the through hole and can move along the central axis;

[0045] At least one post is provided on the connection side of the button, and the post and the button are designed as an integrated whole; the post and the through hole correspond one to one, and the post passes through the corresponding through hole and abuts on the clamping wheel;

[0046] The end of the support column is provided with a bend for preventing slippage, and the bend is provided with a smooth inclined surface for easy insertion. Relying on the smooth inclined surface of the bend, the key is pressed into the key installation position. When the smooth inclined surface slides, the support column moves toward the middle position due to its own elasticity. After passing through the through hole, the bend rebounds, and the stepped surface of the bend is stuck on the other side of the through hole to prevent slippage. Pressing the key again will also allow the key to move along the through hole, applying pressure to the clamping wheel, causing it to move horizontally, so that the protrusion on the clamping wheel disengages from the groove on the handle connector, achieving unlocking. At this time, after rotating the handle connector to the appropriate position, release the key, and the clamping wheel rebounds to achieve locking.

[0047] The protrusions form gear teeth along their circumference, and the grooves form tooth grooves along the circumference of the inner wall of the circular groove. The teeth and tooth grooves cooperate with each other. The arrangement of the teeth and tooth grooves enables it to have multiple rotation positions, and can be adjusted to a suitable angle whether it is pushed or pulled.

[0048] The spring is a compression spring, which is located in the circular groove of the frame clamp, so that the clamp wheel has a tendency to move toward the other circular groove. The spring can also be a tension spring, which is located in the circular groove of the handlebar connector, so that the wheel has a tendency to move toward the circular groove of the handlebar connector.

[0049] A pin is provided at the center of the circular groove connected to the handle, and the pin passes through the clamping wheel.

[0050] The frame is also provided with a flap a and a flap b, wherein the flap a and the flap b are hinged to the inner side of the frame clamp of the rotating joint, the outer surface of one of the flaps is provided with a handle, and the other flap is provided with an undercut, which is buckled on the edge of the frame.

[0051] The wheel assembly includes a wheel axle mounted on the frame, and a wheel member connected to a bearing is provided on the wheel axle;

[0052] The wheel component includes a knob and two interlocking wheel hubs;

[0053] The wheel axle includes an outer shaft and an inner shaft; the inner shaft is sleeved in the outer shaft, and the two are fixedly connected by screws, the two wheel hubs are sleeved outside the outer shaft and the central axes of the three coincide; a threaded shaft is provided on the central shaft of the knob, an internal thread is provided inside the inner shaft, and the threaded shaft passes through the outer hub and cooperates with the internal thread; a pressure ring is also sleeved on the outer shaft, and the pressure ring is located on the outside of the outer hub; a protrusion is provided on the outer surface of the pressure ring, and the extension edge of the protrusion passes through the inner shaft and abuts against the inner surface of the knob.

[0054] The contact part of the two wheel hubs is provided with a ground contact ring for contacting the ground; the ground contact ring coincides with the center axis of the wheel hub, part of the ground contact ring overlaps the edge of the inner wheel hub, and the other part is mounted on the edge of the outer wheel hub.

[0055] The inner shaft and the outer shaft are both sleeve structures, wherein the inner end of the outer shaft is connected to the vehicle frame, the outer end of the inner shaft is provided with an extension edge, and the extension edge is provided with a through hole for the protrusion to pass through.

[0056] The threaded shaft is a tubular structure with a bifurcated end. The bifurcated end is provided with a bend, and the bend is provided with an inclined surface. The bend cooperates with a latch on the inner shaft to prevent slippage. The inclined surface facilitates the bend to slide through the latch by deformation.

[0057] In this embodiment, the wheel assembly is rotated by rotating the knob, which moves closer to the inside, pressing the pressure ring against the outer hub, and locking the wheel rotation through friction.

[0058] Furthermore, the rotating joints are provided with two groups, which are respectively located on both sides of the frame; the handle is an arc-shaped rod bent 180 degrees, both ends of which are connected to the rotating joints, and the end of the handle is a handle connecting piece.

[0059] Furthermore, the flap a and the flap b are both arc-shaped surfaces.

[0060] Furthermore, there are four wheel mounting positions, two of which are used to mount wheel assemblies, and the other two are used to mount wheels.

Claims

1. A trolley comprising a frame and a handle, characterized in that: It also includes a button and a card wheel; the frame and the handle are connected by a rotating joint; a wheel mounting position is provided on the bottom of the frame, and the wheel assembly is installed on the wheel mounting position; The rotary joint includes a frame clamp fixed to the frame and a handlebar connector at the end of the handlebar; the handlebar connector, the clamping wheel and the frame clamp are all located on the same central axis, wherein the handlebar connector and the frame clamp are both provided with circular grooves, and the two circular grooves are opposite to form a circular through cavity for the displacement of the clamping wheel; The side wall of the clamping wheel is divided into two parts, one part has a smooth curved surface on the circumference, and the other part has a protrusion on the circumference; the inner walls of the two circular grooves are provided with grooves that match the protrusions; a spring is provided between the bottom of one of the circular grooves and the clamping wheel; The handle connector is provided with a through hole extending through the circular groove, and the button is located in the through hole and can move along the central axis; At least one post is provided on the connection side of the button, and the post and the button are designed as an integrated whole; the post and the through hole correspond one to one, and the post passes through the corresponding through hole and abuts on the clamping wheel; The end of the support column is provided with a bend for preventing it from falling off, and the bend is provided with a smooth inclined surface for easy embedding; The frame is also provided with a flap a and a flap b, wherein the flap a and the flap b are hinged to the inner side of the frame clamp of the rotating joint, the outer surface of one of the flaps is provided with a handle, and the other flap is provided with an undercut, which is buckled on the edge of the frame.

2. A trolley according to claim 1, characterized in that: The wheel assembly includes a wheel axle mounted on the frame, and a wheel member connected to a bearing is provided on the wheel axle; The wheel component includes a knob and two interlocking wheel hubs; The wheel axle includes an outer shaft and an inner shaft; the inner shaft is sleeved in the outer shaft, and the two are fixedly connected by screws, the two wheel hubs are sleeved outside the outer shaft and the central axes of the three coincide; a threaded shaft is provided on the central shaft of the knob, an internal thread is provided inside the inner shaft, and the threaded shaft passes through the outer hub and cooperates with the internal thread; a pressure ring is also sleeved on the outer shaft, and the pressure ring is located on the outside of the outer hub; a protrusion is provided on the outer surface of the pressure ring, and the extension edge of the protrusion passes through the inner shaft and abuts against the inner surface of the knob.

3. A trolley according to claim 2, characterized in that: The inner shaft and the outer shaft are both sleeve structures, wherein the inner end of the outer shaft is connected to the vehicle frame, the outer end of the inner shaft is provided with an extension edge, and the extension edge is provided with a through hole for the protrusion to pass through.

4. A trolley according to claim 1, characterized in that: The rotating joints are provided with two groups, which are respectively located on both sides of the frame; the handle is an arc-shaped rod bent 180 degrees, with both ends connected to the rotating joints, and the end of the handle is a handle connecting piece.

5. The trolley according to claim 1, characterized in that: The flap a and the flap b are both arc-shaped surfaces.

6. A trolley according to claim 1, characterized in that: There are four wheel mounting positions, two of which are used to mount wheel assemblies, and the other two are used to mount wheels.

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