CN111134995A

CN111134995A - Medical nursing trolley

Info

Publication number: CN111134995A
Application number: CN202010143652.6A
Authority: CN
Inventors: 王妮娜; 陈嘉; 丁健
Original assignee: Xiangya Hospital of Central South University
Current assignee: Xiangya Hospital of Central South University
Priority date: 2020-03-04
Filing date: 2020-03-04
Publication date: 2020-05-12
Anticipated expiration: 2040-03-04
Also published as: CN111134995B

Abstract

The invention provides a medical nursing cart, which comprises a chassis, two universal wheel sets and two fixing lock sets at two ends of the chassis, and a foot-operated button assembly for controlling the two fixing lock sets, wherein each universal wheel set comprises a bearing seat, a wheel seat and wheels, the wheel seat is rotatably arranged on the bearing seat, and the wheels do not interfere with the lower part of an inner hole of a cylinder sleeve part of the bearing seat; the lifting column penetrates through an inner hole of the sleeve part, a rubber sleeve is arranged at the bottom end of the lifting column and is in threaded fit with the lifting sleeve, the lower end of a compression spring tightly presses the lifting sleeve to a bearing seat, the swing arm is arranged on the base, and the front end of the swing arm is matched with the lifting sleeve; the foot-operated button assembly comprises a sealing cover, a foot-operated button and a clamping rod, the foot-operated button is provided with an accommodating cavity, the lower end of the foot-operated button is matched with the swing arm, the clamping rod is arranged in the accommodating cavity, the upper end of the clamping rod is provided with a protruding clamping block, and the foot-operated button is jacked by the protruding clamping block and an orifice on the sealing cover after being operated. The operation of switching between the locking state and the non-locking state is simple, and the pressure between the rubber sleeve and the ground can be adjusted.

Description

Medical nursing trolley

Technical Field

The invention relates to the technical field of transportation tools, in particular to a special transportation tool for medical staff, and particularly relates to a medical nursing trolley.

Background

Before clinical operation, in the operation process, in multiple occasions such as changing dressings, medical personnel generally need to use the shallow that can accomodate article such as various medical appliances and medicines, need fix the shallow at any time in use at a certain specific position, have the shallow of various forms in the existing market, if have the exogenic action then easily moved in use to various problems take place, if inconvenient, delay time, even topple over and cause other problems. The wheel can be fixed (namely with a brake), but the wheel has poor fixing effect because the contact area is limited and the arc surface is contacted with the ground to form good fixing.

Therefore, providing a medical nursing cart which can better adapt to the working environment is an important technical problem which needs to be solved urgently by technical personnel in the field.

Disclosure of Invention

The invention aims to provide a medical nursing trolley which can be well adapted to a working environment and is simple and convenient to operate.

In a first aspect, a medical nursing cart is provided, which comprises a chassis, two universal wheel sets and two lock sets arranged at two ends of the chassis, and a foot button assembly for controlling the two lock sets, wherein,

the universal wheel set comprises a bearing seat, a wheel seat and wheels, the bearing seat is provided with a vertical sleeve part, the wheel seat is rotatably arranged on the sleeve part through a bearing set, a wheel fork part of the wheel seat is obliquely arranged, and the wheels are arranged at the bottom of the wheel fork part and do not interfere with the lower part of an inner hole of the sleeve part;

the fixed lock group comprises a lifting column, a lifting sleeve and a swing arm, the lifting column can slidably penetrate through an inner hole of the sleeve part, a rubber sleeve is arranged at the bottom end of the lifting column, a hexagonal shaft section is arranged above the rubber sleeve, the lifting sleeve is in threaded fit with the lifting column, a compression spring is sleeved at the upper part of the lifting column, the upper end of the compression spring is tightly pressed with the chassis, the lifting sleeve is tightly pressed to the bearing seat by the lower end of the compression spring, the swing arm is arranged on the chassis and can rotate in a vertical plane, and the front end of the swing arm is matched with the lifting sleeve;

the foot-operated button assembly comprises a sealing cover, a foot-operated button and a clamping rod, the foot-operated button is provided with an accommodating cavity and is arranged on the sealing cover or the chassis in a vertically sliding mode, the lower end of the foot-operated button is matched with the tail ends of the two swing arms which are symmetrically arranged, the lower end of the clamping rod is rotatably arranged in the accommodating cavity, the upper end of the clamping rod provides pre-tightening force towards the opening part of the accommodating cavity through an elastic element and is provided with a protruding clamping block, and the foot-operated button is jacked up by the protruding clamping block and an orifice on the sealing cover or the chassis after being stepped.

Preferably, the lifting sleeve is provided with lifting lugs at two sides, and the front end of the swing arm is provided with a shifting fork part inserted into the lifting lugs. The bottom of the rubber sleeve adopts a sucker type structure.

Preferably, the bearing seat and the chassis are positioned in a matched manner by adopting a spigot structure, the bearing seat is provided with a male spigot, and the chassis is provided with a corresponding female spigot.

Preferably, a sliding bearing is arranged in an inner hole of the sleeve part of the bearing seat, the lower part of the inner cavity of the lifting sleeve is a first circular hole section in sliding fit with the lifting column, the middle part of the inner cavity of the lifting sleeve is a threaded section, the upper part of the inner cavity of the lifting sleeve is a second circular hole section in sliding fit with the upper part of the lifting column, the diameter of the second circular hole section is smaller than the small diameter of the thread of the threaded section, and the diameter of the first circular hole section is larger than the large diameter of the threaded section.

Preferably, the wheel seat is rotatably arranged on the sleeve part through an upper thrust bearing and a lower tapered roller bearing, the lower part of the sleeve part adopts a round nut to lock an inner ring of the tapered roller bearing, the upper part of the round nut is provided with an upward extending dust blocking ring part, and the dust blocking ring part extends into or out of an outer ring of the tapered roller bearing.

Preferably, the bearing seat is further provided with a dust blocking part which extends downwards and is matched with the upper part of the wheel seat.

Preferably, the chassis is provided with a mounting hole matched with the lifting column, the upper part of the mounting hole is a stepped hole, and the upper end of the compression spring is propped against the hole shoulder of the stepped hole.

Preferably, a clamping rod groove is formed in the inner wall of the foot button, a shaft pin is arranged at the bottom of the groove, and the lower end of the clamping rod is rotatably limited in the clamping rod groove at the upper part and the lower part of the shaft pin.

In an alternative technical scheme, the clamping rod is obliquely arranged in the accommodating cavity, the lower end of the clamping rod is arranged in the depth of the accommodating cavity, the upper end of the clamping rod is provided with a protruding clamping block, and after the foot-operated button is pressed down, the clamping rod is inclined forwards to enable the protruding clamping block on the clamping rod to be abutted against an opening on the cover or the chassis.

In a second aspect, a medical nursing cart is provided, which comprises a chassis, two universal wheel sets and two locking sets arranged at two ends of the chassis, and a foot-operated button assembly for controlling the two locking sets,

the fixed lock group comprises a lifting column, a lifting sleeve and a swing arm, wherein the lifting column can slidably penetrate through an inner hole of the sleeve part, a rubber sleeve is arranged at the bottom end of the lifting column, a hexagonal shaft section is arranged above the rubber sleeve, the lifting sleeve is in threaded fit with the lifting column, lifting lugs are arranged on two sides of the lifting sleeve, the lower end of the lifting sleeve is limited by a bearing seat in a contact manner, a compression spring is sleeved on the upper part of the lifting column, the lower end of the compression spring compresses the lifting sleeve, and the upper end of the compression spring compresses the chassis; the swing arm is arranged on the chassis and can rotate in a vertical plane, and a shifting fork part at the front end of the swing arm is inserted into the lifting lug;

the foot-operated button assembly comprises a sealing cover, a foot-operated button and a clamping rod, the foot-operated button is provided with an accommodating cavity and is arranged on the sealing cover or the chassis in a vertically sliding mode, the lower end of the foot-operated button is matched with the tail ends of the two swing arms which are symmetrically arranged, the lower end of the clamping rod is rotatably arranged on the foot-operated button, the upper end of the clamping rod is provided with a protruding clamping block, the elastic element provides pre-tightening force towards the opening part of the accommodating cavity, and the foot-operated button is jacked by the protruding clamping block and an orifice on the sealing cover or the chassis after being stepped.

In some alternative technical schemes, only one end is provided with two universal wheel sets and two fixed lock sets, and a foot button component for controlling the two fixed lock sets, and the other end is provided with two conventional non-universal wheels.

The advantageous effects of some of the inventions of the present invention are roughly as follows.

1. The related medical nursing cart comprises a chassis and a frame, wherein two universal wheel sets, two fixing and locking sets and a foot-operated button assembly for controlling the two fixing and locking sets are respectively arranged at two ends of the bottom of the chassis, each universal wheel set comprises a bearing seat, a wheel seat and a wheel, and the wheel does not interfere with the lower part of an inner hole of a barrel sleeve part of the bearing seat; the fixed lock group comprises a lifting column, a lifting sleeve and a swing arm, the lifting column penetrates through an inner hole of the sleeve part, a rubber sleeve is arranged at the bottom end of the lifting column, the lifting column is provided with a hexagonal shaft section, the lifting sleeve is in threaded fit with the lifting column, a compression spring is sleeved on the upper portion of the lifting column, the upper end of the compression spring is tightly pressed with the chassis, the lifting sleeve is tightly pressed to the bearing seat by the lower end of the compression spring, the swing arm is installed on the chassis and can rotate in a vertical plane, and the front end of the swing arm is matched with the lifting sleeve; the foot-operated button assembly comprises a sealing cover, a foot-operated button and a clamping rod, the foot-operated button is provided with an accommodating cavity and is arranged on the sealing cover or the chassis in a vertically sliding mode, the lower end of the foot-operated button is matched with the tail ends of the two swing arms which are symmetrically arranged, the lower end of the clamping rod is rotatably arranged in the accommodating cavity, the upper end of the clamping rod provides pre-tightening force towards the opening part of the accommodating cavity through an elastic element and is provided with a protruding clamping block, and the foot-operated button is jacked up by the protruding clamping block and an orifice on the sealing cover or the chassis after being stepped. The rubber sleeve at the bottom end of the lifting column is landed or separated by controlling the lifting of the foot-operated button, so that the position of the medical nursing trolley is easily locked or unlocked; meanwhile, the relative height between the lifting column and the lifting sleeve can be realized by rotating the hexagonal shaft section to adjust the pressure between the rubber sleeve and the ground, and the pressure is adjustable, namely the static friction force between the lifting column and the ground is adjustable when the lifting column is locked.

2. The universal wheel sets comprise bearing seats, wheel seats and wheels, and the wheels do not interfere with the lower part of an inner hole of a cylinder sleeve part of the bearing seats; the fixed lock group comprises a lifting column, a lifting sleeve and a swing arm, the lifting column penetrates through an inner hole of the sleeve part, a rubber sleeve is arranged at the bottom end of the lifting column, the lifting sleeve is in threaded fit with the lifting column, lifting lugs are arranged on two sides of the lifting sleeve, the lower end of the lifting sleeve is limited by the bearing seat in a contact mode, a compression spring is sleeved on the upper portion of the lifting column, the lower end of the compression spring compresses the lifting sleeve, and the upper end of the compression spring compresses the chassis; the swing arm is arranged on the chassis and can rotate in a vertical plane, and a shifting fork part at the front end of the swing arm is inserted into the lifting lug; the foot-operated button assembly comprises a sealing cover, a foot-operated button and a clamping rod, the foot-operated button is provided with an accommodating cavity and is arranged on the sealing cover or the chassis in a vertically sliding mode, the lower end of the foot-operated button is matched with the tail ends of the two swing arms which are symmetrically arranged, the lower end of the clamping rod is rotatably arranged in the accommodating cavity, the upper end of the clamping rod provides pre-tightening force towards the opening part of the accommodating cavity through an elastic element and is provided with a protruding clamping block, and the foot-operated button is jacked up by the protruding clamping block and an orifice on the sealing cover or the chassis after being stepped. The rubber sleeve at the bottom end of the lifting column is landed or separated by controlling the lifting of the foot-operated button, so that the position of the medical nursing trolley is easily locked or unlocked; meanwhile, the relative height between the lifting column and the lifting sleeve can be realized by rotating the hexagonal shaft section to adjust the pressure between the rubber sleeve and the ground, and the pressure is adjustable, namely the static friction force between the lifting column and the ground is adjustable when the lifting column is locked.

Drawings

In order to illustrate the embodiments of the claimed invention or the technical solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of some of the inventions, and that other drawings can be obtained by those skilled in the art without inventive effort.

Fig. 1 is a perspective view of the lower portion of an alternative embodiment of a medical care cart according to the present invention.

Fig. 2 is a schematic view of a partial section of fig. 1, the section passing through the centerline of the lifting column, illustrating the lifting column as it descends to the bottom.

Fig. 3 is a partial cross-sectional view of fig. 1, the cross-section is perpendicular to the plane formed by the center lines of the two lifting columns at the same end, corresponding to the state when the lifting columns are lowered to the bottom.

Fig. 4 is a schematic view of a part of fig. 1 in section through the centre line of the lifting column, illustrating the lifting column in a lifted-up state.

Fig. 5 is a partial cross-sectional view of fig. 1, the cross-section being perpendicular to a plane formed by the center lines of two lifting columns at the same end, corresponding to the lifting column being lifted.

Fig. 6 is a schematic perspective view of an alternative embodiment of the bearing seat shown in fig. 1 to 5.

Fig. 7 is a schematic perspective view of an alternative embodiment of the wheel seat shown in fig. 1 to 5.

Fig. 8 is a perspective view of an alternative embodiment of the round nut of fig. 1-5.

Fig. 9 is a schematic perspective view of an alternative embodiment of the lifting sleeve of fig. 1-5.

Fig. 10 is a schematic perspective view of an alternative embodiment of the swing arm shown in fig. 1 to 5.

Fig. 11 is a schematic perspective view of an alternative embodiment of the closure of fig. 1-5.

Fig. 12 is a schematic perspective view of an alternative embodiment of the foot button shown in fig. 1 to 5.

Fig. 13 is a schematic perspective view of an alternative embodiment of the latch of fig. 1-5.

Detailed Description

In order that those skilled in the art will better understand the technical solutions involved in the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and specific examples. It should be noted that, in a non-conflicting manner, the embodiments of the present invention and each of the specific technical features described in the embodiments may be combined in any suitable manner; in order to avoid unnecessary repetition, various possible combinations will not be described in detail, and the same shall be considered as disclosed in the present invention, as long as the combination does not depart from the gist of the invention.

In a specific embodiment, referring to fig. 1, a medical nursing cart is provided, which comprises a chassis 10 and a cart frame disposed on the chassis 10, wherein two universal wheel sets 20 and two locking sets 30 are disposed at two ends of the bottom of the chassis 10, respectively, and a foot button assembly 40 for controlling the two locking sets 30, wherein the cart frame is not illustrated in the drawings, and the cart frame may be disposed on the chassis 10 in any manner known in the art.

As shown in fig. 1 to 5, the universal wheel set 20 includes a bearing block 21, a wheel block 22, and a wheel 23; the fixed lock group 30 comprises a lifting column 31, a lifting sleeve 32 and a swing arm 33; the foot button assembly 40 includes a cover 41, a foot button 42, and a latch 43.

As shown in fig. 1 to 7, the bearing seat 21 has a vertical sleeve portion 212, the wheel seat 22 is rotatably provided on the sleeve portion 212 through a bearing set (24, 25), the fork portion 224 of the wheel seat 22 is obliquely arranged, and the wheel 23 is mounted at the bottom of the fork portion 224 and does not interfere with the lower portion of the inner hole of the sleeve portion 212. Fig. 7 is an alternative embodiment of the wheel seat 22, and the fork portion 224 of the wheel seat 22 for mounting the wheel 23 can also adopt other various prior art structures as long as the functional requirements are met, so that the wheel 23 does not interfere with the lower part of the inner hole of the sleeve portion 212.

As shown in fig. 2 to 6, the lifting column 31 slidably passes through the inner hole of the sleeve portion 212, the bottom end of the lifting column 31 is provided with a rubber sleeve 34, and a hexagonal shaft section 311 is provided above the rubber sleeve 34. As shown in fig. 2 to 6 and 9, the lifting sleeve 32 is screwed to the lifting column 31. As shown in fig. 2 to 6, 9 and 10, a compression spring 35 is sleeved on the upper portion of the lifting column 31, the upper end of the compression spring 35 is pressed against the chassis 10, the lower end of the compression spring presses the lifting sleeve 32 against the bearing seat 21, the swing arm 33 is mounted on the chassis 10 and can rotate in a vertical plane, and the front end 331 of the swing arm 33 is matched with the lifting sleeve 32.

As shown in fig. 1 to 5 and fig. 10 to 13, the step button 42 has a receiving cavity 421, and is disposed on the cover 41 or the chassis 10 in a vertically sliding manner, the lower end of the step button 42 is engaged with the tail ends 333 of the two swing arms 33 symmetrically disposed, the lower end of the locking rod 43 is rotatably disposed in the receiving cavity 421, the upper end of the locking rod is provided with a protrusion block 431 toward the mouth of the receiving cavity 421 by the elastic element 44, and the step button 42 is pressed down and then is supported by the protrusion block 431 and the opening of the cover 41.

In an alternative embodiment, the foot button 42 may be directly slidably disposed on the chassis 10, and the protrusion 431 is abutted against the opening of the chassis 10. The snap block 431 means a protruding snap block.

When in use, a foot (or other tools or objects and the like can be adopted) is used for treading on the bottom of the accommodating cavity 421, the treading button 42 is treaded down, the tail end 333 of the swing arm 33 descends, the front end 331 of the swing arm 33 is lifted to drive the lifting sleeve 32 to lift, the lifting sleeve 32 drives the lifting column 31 to lift, the rubber sleeve 34 on the bottom end of the lifting column 31 leaves the ground, and the universal wheel set 20 recovers the universal function; meanwhile, when the foot button 42 descends to the bottom, the upper end of the latch rod 43 is pushed out by the elastic element 44, and the latch block 431 abuts against the opening on the cover 41 or the chassis 10, and the state is maintained without external force.

If the medical care cart is required to be prevented from being easily moved, the locking rod 43 in the accommodating cavity 421 is kicked inward by feet (or other tools or objects can be used) to disengage the locking block 431 on the locking rod 43 from the opening on the cover 41 or the chassis 10 (the elastic element 44 is compressed), the foot button 42 is lifted, because the compression spring 35 has a downward pressure on the lifting sleeve 32, the front end 331 of the swing arm 33 is lowered and the tail end 333 is raised; the lifting column 31 is lowered to the bottom and the rubber sleeve 34 is in contact with the ground and has a certain pressure (determined by the elastic force of the compression spring 35) so that the position of the medical nursing cart is fixed and can not move freely like a universal wheel.

In addition, as the lifting column 31 is in threaded fit with the lifting sleeve 32, and the hexagonal shaft section 311 is arranged at the lower part of the lifting column 31, the relative heights of the lifting column 31 and the lifting sleeve 32 can be adjusted by rotating the hexagonal shaft section 311 by a wrench, namely the adjustment of the pressure between the rubber sleeve 34 and the ground during locking can be realized. In a preferred embodiment, the bottom of the rubber sleeve 34 is of a suction cup type structure, which makes the locking more reliable.

In a preferred embodiment, as shown in fig. 2 to 5, and fig. 9 and 10, the lifting sleeve 32 has lifting lugs 321 on both sides, and the front end 331 of the swing arm 33 is a fork inserted into the lifting lugs 321, and the fork rotates around the rotation center of the swing arm 33 to drive the lifting sleeve 32 to lift, wherein the lifting is performed by downward pressure provided by the compression spring 35.

In an alternative embodiment, as shown in fig. 2 to 5, and fig. 9 and 10, the front end 331 of the swing arm 33 is a fork, and the swing arm 33 has a pivot hole 332 for receiving a pivot shaft, which is disposed on the chassis 10 or the cover 41. In a preferred embodiment, referring to fig. 9 and 10, the swing arm 33 has a circular arc shaped protrusion 334 on the front end 331, and the circular arc shaped protrusion 334 is matched with a plane or a curved surface in the lifting lug 321, so that the swing arm can be more flexible. In addition, the tail end 333 of the swing arm 33 may be constructed in various suitable conventional manners, such as a hook-shaped tail end, which is engaged with the foot button 42 to increase the stroke of the lifting sheath 32. The stroke of the lifting sleeve 32 can be easily changed by changing the stroke of the foot button 42 and the structure of the swing arm 33, so that the lifting stroke of the lifting column 31 can be adjusted according to actual needs, and is not limited to the shorter stroke shown in fig. 2 and 4.

In a preferred embodiment, as shown in fig. 2-6, the bearing seat 21 and the chassis 10 are cooperatively positioned using a spigot arrangement, with the bearing seat 21 having a male spigot 216 and the chassis 10 having a corresponding female spigot 13.

In an alternative embodiment, as shown in fig. 2 to 6, the bearing housing 21 has a flange mounting plate 211, the flange mounting plate 211 having mounting holes 215, and bolts passing through the mounting holes 215 to mount the bearing housing 21 to the chassis 10. In a preferred embodiment, as shown in fig. 2 to 6, the inner bore of the sleeve portion 212 of the bearing housing 21 is provided with a sliding bearing 213 therein, and both the upper and lower portions of the inner bore are provided with one sliding bearing 213, or the entire bore is provided with one sliding bearing in its entirety and the inner diameter of the middle portion is large without making the contact surface area excessively large.

As shown in fig. 2 and 4, the bearing seat 21 further has a dust-blocking portion 217 extending downward and engaging with an upper portion of the wheel seat 22.

In a preferred embodiment, as shown in fig. 2 to 8, the wheel holder 22 is rotatably provided on the sleeve portion 212 by an upper thrust bearing 24 and a lower tapered roller bearing 25, and the lower portion of the sleeve portion 212 has a threaded portion 214. The inner ring of the tapered roller bearing 25 is locked by fitting the round nut 26 to the threaded portion 214. Among them, the thrust ball bearing is used as the thrust bearing 24 shown in fig. 2 to 5.

In an alternative embodiment, as shown in fig. 2 to 4 and 7, the wheel base 22 includes a wheel body 221, a thrust bearing mounting hole 222, a tapered roller bearing mounting hole 223, and a wheel fork portion 224. Of course, the wheel base 22 may be constructed in various other suitable conventional manners besides the structure shown in fig. 7, and it is sufficient to ensure the function and purpose of the fork 224 and the function of the wheel base to be horizontally rotatable.

In an alternative embodiment, as shown in fig. 2 and 4, and fig. 8, the upper portion of the round nut 26 has an upwardly extending dust blocking ring portion 263, and the dust blocking ring portion 263 extends into or out of the outer ring of the tapered roller bearing 25. As shown in fig. 8, the round nut 26 has internal threads 261 and an external hex 262.

In a preferred embodiment, as shown in fig. 2 to 5 and 9, the inner cavity of the lifting sleeve 32 has a lower portion with a first circular hole section 322 slidably engaged with the lifting column 31, a middle portion with a threaded section 323, and an upper portion with a second circular hole section 324 engaged with the upper portion of the lifting column 31, the diameter of the second circular hole section 324 is smaller than the small diameter of the threads of the threaded section 323, and the diameter of the first circular hole section 322 is larger than the large diameter of the threaded section 323. Accordingly, the lifting column 31 has a threaded section 312 thereon.

In an alternative embodiment, as shown in fig. 1-5, and 11, the cover 41 includes a cover portion 411, bolt mounting holes 412, button mounting frames 413, button slides 414, apertures 415, and rails 416. As shown in fig. 1 to 5 and 12, a latch groove 423 is formed on an inner wall of the step button 42, a shaft pin 422 is provided at a bottom of the latch groove 423, and a lower end of the latch 43 is rotatably defined in the latch groove 423 at upper and lower portions of the shaft pin 422. The elastic member mounting hole 424 of the foot button 42, the dust guard 425. The dust guard 425 is in front of the balustrade 416 and also remains partially blocked during the raising and lowering process. The foot button 42 slides up and down within the button slide 414. Of course, besides the square structure shown in the figure, other various suitable structures and reasonable modifications can be adopted to meet the function. The specific manner in which the shaft pin 422 is disposed in the lever groove 423 may employ various suitable prior art techniques.

As shown in fig. 1 to 5 and 11, the catching bar 43 has a pin hole 432 at a lower portion thereof, a catching protrusion 431 at an upper portion thereof, and a kick inclined surface 433 at a middle portion thereof, and the kick inclined surface 433 is inclined outward. The shaft pin hole 432 of the catch lever 43 is engaged with the shaft pin 422. The shaft pin 422 may be accommodated in the accommodation chamber 421, and the lever groove 423 may not be provided in this case. The elastic member 44 may be disposed in the elastic member mounting hole 424, or may be fixed to the rear of the upper portion of the locking rod 43, or may be a spring or any other suitable elastic member, and when fixed to the rear of the upper portion of the locking rod 43 opposite to the protrusion 431, the elastic member mounting hole 424 may not be disposed on the step button 42.

As shown in fig. 2 to 5, the chassis 10 has a mounting hole 11 for engaging with the lifting column 31, a mounting hole 12 for the foot button assembly, a female spigot 13, and a cavity 14 for accommodating the swing arm 33, the mounting hole 11 has a stepped hole 111 at an upper portion, and the upper end of the compression spring 35 abuts against a shoulder of the stepped hole 111.

In an alternative non-illustrated embodiment, referring to fig. 1 to 5 and fig. 10 to 13, the jamming rod 43 is disposed in the accommodating cavity 421 in an inclined manner, the lower end of the jamming rod 43 is located at the deep position of the accommodating cavity 421, the upper end of the jamming rod 43 has a protruding block 431, and after the foot button 42 is pressed down, the jamming rod 43 is tilted forward to make the protruding block 431 on the jamming rod 43 abut against the opening on the cover 41 or the chassis 10.

In addition, in any of the above embodiments, the frame on the chassis 10 and the chassis 10 may be integrated or connected by using various prior arts, and the description of the present invention is omitted.

Referring to fig. 1 to 13, in one embodiment, a medical care cart includes a chassis 10, two universal wheel sets 20 and two locking sets 30 respectively disposed at two ends of the chassis 10, and a foot button assembly 40 for controlling the two locking sets 30. The universal wheel set 20 comprises a bearing seat 21, a wheel seat 22 and a wheel 23, the bearing seat 21 is provided with a vertical sleeve part 212, the wheel seat 22 is rotatably arranged on the sleeve part 212 through bearing sets (24, 25), a fork part 24 of the wheel seat 22 is obliquely arranged, and the wheel 23 is arranged at the bottom of the fork part 224 and does not interfere with the lower part of an inner hole of the sleeve part 212; the fixed lock group 30 comprises a lifting column 31, a lifting sleeve 32 and a swing arm 33, wherein the lifting column 31 can slidably penetrate through an inner hole of the sleeve part 212, the bottom end of the lifting column 31 is provided with a rubber sleeve 34, a hexagonal shaft section 311 is arranged above the rubber sleeve 34, the lifting sleeve 32 is in threaded fit with the lifting column 31, two sides of the lifting sleeve 32 are provided with lifting lugs 321, the lower end of the lifting sleeve 32 is limited by a bearing seat 21 in a contact manner, the upper part of the lifting column 31 is sleeved with a compression spring, the lower end of the compression spring compresses the lifting sleeve 32, and the upper end of the compression spring compresses the chassis 10; the swing arm 33 is arranged on the chassis 10 and can rotate in a vertical plane, and a shifting fork part at the front end 331 of the swing arm 33 is inserted into the lifting lug 321; the foot button assembly 40 includes a cover 41, a foot button 42, and a locking rod 43, the foot button 42 has a receiving cavity 421, and is slidably disposed on the cover 41 or the chassis 10, the lower end of the foot button 42 is engaged with the tail ends 333 of the two swing arms 33, the lower end of the locking rod 43 is rotatably disposed on the foot button 42, the upper end of the locking rod has a protruding locking block 431, and the elastic element 44 provides a pre-tightening force toward the opening of the receiving cavity 421, and the foot button 42 is pressed down and supported by the protruding locking block 431 and the opening of the cover 41 or the chassis 10.

In some alternative embodiments, only one end is provided with two universal wheel sets 20 and two lock sets 30, and a foot button assembly 40 for controlling the two lock sets 30, and the other end is provided with two conventional non-universal wheels.

In addition, when the medical nursing cart is fixed or the medical nursing cart is fixed, the foot can press the foot button 42 without kicking the clamping rod 43, and the foot tip faces the inner point to hold the clamping rod 43, so that the protruding clamping block 431 at the upper end of the clamping rod 43 can be separated from the opening on the cover 41 or the chassis 10, and then the foot tip slightly pushes against the clamping rod 43, so that the foot button 42 can be lifted, and the lifting column 31 can be lowered by the foot pulling force to complete the fixing work.

The above description of the function or effect of each invention is intended to mean that it has the function or effect, and that it may have other functions or effects, and therefore should not be construed as unduly limiting the function or effect.

A medical care cart provided by the claimed invention is described in detail above. The principles and embodiments of the claimed invention have been described herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the claimed invention. It should be noted that while the best modes for carrying out the claimed invention have been described in detail, those familiar with the art to which this invention relates will recognize various alternative designs and embodiments for practicing the claimed invention within the scope of the appended claims.

Claims

1. A medical nursing cart comprises a chassis, two universal wheel sets and two lock sets arranged at two ends of the chassis, and a foot button component for controlling the two lock sets,

the fixed lock group comprises a lifting column, a lifting sleeve and a swing arm, the lifting column can slidably penetrate through an inner hole of the sleeve part, a rubber sleeve is arranged at the bottom end of the lifting column, a hexagonal shaft section is arranged above the rubber sleeve, the lifting sleeve is in threaded fit with the lifting column, a compression spring is sleeved at the upper part of the lifting column, the upper end of the compression spring is tightly pressed with the base, the lifting sleeve is tightly pressed to the bearing seat by the lower end of the compression spring, the swing arm is arranged on the base and can rotate in a vertical plane, and the front end of the swing arm is matched with the lifting sleeve;

the foot-operated button assembly comprises a sealing cover, a foot-operated button and a clamping rod, the foot-operated button is provided with an accommodating cavity and is arranged on the sealing cover or the base in a vertically sliding mode, the lower end of the foot-operated button is matched with the tail ends of the two swing arms which are symmetrically arranged, the lower end of the clamping rod is rotatably arranged in the accommodating cavity, the upper end of the clamping rod provides pre-tightening force towards the opening part of the accommodating cavity through an elastic element and is provided with a protruding clamping block, and the foot-operated button is jacked up by the protruding clamping block and an orifice on the sealing cover or the base after being stepped.

2. The medical nursing cart of claim 1, wherein the lifting sleeve has lifting lugs at two sides thereof, the swing arm has a fork inserted into the lifting lugs at a front end thereof, and the rubber sleeve has a suction cup type structure at a bottom thereof.

3. The medical care cart of claim 1 or 2, wherein the bearing housing is cooperatively positioned with the base in a spigot configuration, the bearing housing having a male spigot thereon and the base having a corresponding female spigot thereon.

4. The medical care cart according to any one of claims 1 to 3, wherein a sliding bearing is arranged in an inner hole of the sleeve portion of the bearing seat, a first circular hole section which is in sliding fit with the lifting column is arranged at the lower portion of an inner cavity of the lifting sleeve, a threaded section is arranged at the middle portion of the inner cavity of the lifting sleeve, a second circular hole section which is matched with the upper portion of the lifting column is arranged at the upper portion of the inner cavity of the lifting sleeve, the diameter of the second circular hole section is smaller than the small diameter of threads of the threaded section, and the diameter of the first circular hole section is larger than the large diameter of the threaded section.

5. The medical care cart according to any one of claims 1 to 3, wherein the wheel base is rotatably provided on the sleeve portion through an upper thrust bearing and a lower tapered roller bearing, the lower portion of the sleeve portion locks the inner ring of the tapered roller bearing with a round nut, the upper portion of the round nut has an upwardly extending dust blocking ring portion, and the dust blocking ring portion extends into or out of the outer ring of the tapered roller bearing; the bearing seat is also provided with a dust blocking part which extends downwards and is matched with the upper part of the wheel seat.

6. The medical care cart of any one of claims 1 to 3, wherein the base has a mounting hole for engaging with the lifting column, the mounting hole having a stepped hole at an upper portion thereof, and the upper end of the compression spring abuts against a hole shoulder of the stepped hole; the inner wall of the foot-operated button is provided with a clamping rod groove, the bottom of the groove is provided with a shaft pin, and the lower end of the clamping rod is rotationally limited in the clamping rod groove at the upper part and the lower part of the shaft pin.

7. The medical care cart of any one of claims 1 to 6, wherein the following features are substituted: the clamping rod is obliquely arranged in the accommodating cavity, the lower end of the clamping rod is arranged in the deep position of the accommodating cavity, the upper end of the clamping rod is provided with a protruding clamping block, and after the foot-operated button is treaded down, the clamping rod is inclined forwards to enable the protruding clamping block on the clamping rod to be propped against the hole opening on the sealing cover or the base.

8. A medical nursing trolley is characterized by comprising a chassis, two universal wheel sets and two fixing lock sets which are arranged at two ends of the chassis, and a foot-operated button component for controlling the two fixing lock sets,

the fixed lock group comprises a lifting column, a lifting sleeve and a swing arm, wherein the lifting column can slidably penetrate through an inner hole of the sleeve part, a rubber sleeve is arranged at the bottom end of the lifting column, a hexagonal shaft section is arranged above the rubber sleeve, the lifting sleeve is in threaded fit with the lifting column, lifting lugs are arranged on two sides of the lifting sleeve, the lower end of the lifting sleeve is limited by a bearing seat in a contact manner, a compression spring is sleeved on the upper part of the lifting column, the lower end of the compression spring compresses the lifting sleeve, and the upper end of the compression spring compresses the base; the swing arm is arranged on the base and can rotate in a vertical plane, and a shifting fork part at the front end of the swing arm is inserted into the lifting lug;

the foot-operated button assembly comprises a sealing cover, a foot-operated button and a clamping rod, the foot-operated button is provided with an accommodating cavity and is arranged on the sealing cover or the base in a vertically sliding mode, the lower end of the foot-operated button is matched with the tail ends of the two swing arms which are symmetrically arranged, the lower end of the clamping rod is rotatably arranged on the foot-operated button, the upper end of the clamping rod is provided with a protruding clamping block, the elastic element provides pre-tightening force towards the opening part of the accommodating cavity, and the foot-operated button is jacked by the protruding clamping block and an orifice on the sealing cover or the base after being stepped.

9. The medical care cart of claim 8, wherein the following features are substituted: only one end is provided with two universal wheel sets, two fixing lock sets and a foot-operated button component for controlling the two fixing lock sets, and the other end is provided with two conventional non-universal wheels.

10. The medical care cart of claim 8 or 9, wherein the following features are substituted: the clamping rod is obliquely arranged in the accommodating cavity, the lower end of the clamping rod is arranged in the deep position of the accommodating cavity, the upper end of the clamping rod is provided with a protruding clamping block, and after the foot-operated button is treaded down, the clamping rod is inclined forwards to enable the protruding clamping block on the clamping rod to be propped against the hole opening on the sealing cover or the base.