CN104825281B - Medical stretcher improving safety - Google Patents
Medical stretcher improving safety Download PDFInfo
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- CN104825281B CN104825281B CN201510272452.XA CN201510272452A CN104825281B CN 104825281 B CN104825281 B CN 104825281B CN 201510272452 A CN201510272452 A CN 201510272452A CN 104825281 B CN104825281 B CN 104825281B
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- block
- fixedly connected
- spring
- bar
- cuboid
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Abstract
A medical stretcher improving safety comprises a supporting plate, a handle device, a first connecting device, a second connecting device, elastic devices, a bottom plate, holding devices, a fixing device and a holding rod. The handle device comprises a sponge mat, a handle and a first supporting column. The first connecting device comprises a body, first supporting rods, second supporting rods, a fixing rod and a fixing frame. The second connecting device comprises a second supporting column and a magnet. Each elastic device comprises a first support, first springs, second springs, a buckling block and buckling pieces. Each holding device comprises a first fixing block, a main body portion, a locating rod, a horizontal rod, a wheel and rectangular rods. The bottom plate is provided with vertical rods and horizontal rods. The fixing device comprises a frame body, a locating piece, an abutting block and an abutting spring, wherein the lower end of the abutting spring is fixedly connected with the upper surfaces of the horizontal rods, and the upper end of the abutting spring is fixedly connected with the lower surface of the abutting block. The stretcher can be adjusted to the needed angles within a short period, work efficiency of a hospital is improved, and the fixing effect of the stretcher is good.
Description
Technical field
The present invention relates to field of medical technology, more particularly, to a kind of medical stretcher improving safety.
Background technology
Stretcher is the device being used for transporting patient in emergency call salving, more severe or when walking stair in ground environment, load
Frame is difficult to keep balance, easily causes discomfort to patient, is easy to make patient's landing from stretcher when serious, accidents caused.
Chinese patent cn203029495u discloses a kind of medical stretcher, and it includes a support frame, and supporting plate passes through to prop up
Support axle is fixed in Support frame, and support frame has motor, and motor output shaft is provided with belt pulley, and support frame is in motor
It is respectively provided on two sides with guide wheel, on the downside of supporting plate, two ends are connected with belt two ends, belt passes through two guide wheels and belt pulley tensioning, supporting plate
Downside is provided with gravity sensor and electric machine controller.Although but its can when stretcher tilts, realize adjust automatically so that
Stretcher is in horizontality all the time, however require that constructional devices such as motors on stretcher, not only increases cost and make
The weight obtaining whole stretcher increases, and increased the labor intensity of staff, and when structural damage such as motors, it cannot reach
To predetermined function, thus predetermined purpose cannot be realized.
Accordingly, it is desirable to provide a kind of new technical scheme solves above-mentioned technical problem.
Content of the invention
It is an object of the invention to provide a kind of can effectively solving above-mentioned technical problem raising safety medical stretcher.
In order to solve above-mentioned technical problem, the present invention adopts the following technical scheme that
A kind of medical stretcher improving safety, the medical stretcher of described raising safety includes gripper shoe, positioned at described
Door handle device above gripper shoe, it is located at the first attachment means below described gripper shoe, is located under described first attachment means
Side the second attachment means, be located at the described first attachment means left and right sides elastic device, be located at described second attachment means
Lower section base plate, be located at the described elastic device left and right sides holding apparatuss, be located at right side fixing device and be located at described solid
Determine the holding rod below device, described door handle device includes foam-rubber cushion, handle and the first support column below described handle,
Described first attachment means include body, the first support bar being located at the described body left and right sides, are located at described first support bar
The second support bar of top, it is located at the fix bar below described body and is located at fixed frame below described fix bar, described the
Two attachment means include the second support column and the Magnet above described second support column, and described elastic device includes first
Frame, be located at described first support side the first spring, be located at described first support below second spring, be located at described second
Buckle block below spring and the fastener of buckle block described in buckle, described holding apparatuss include the first fixed block, are arranged at institute
State main part on the first fixed block, the horizon bar being located at locating rod below described main part, being located at described main part side,
It is arranged at the roller in described locating rod and the rectangular shaft being located at the described roller left and right sides, the left and right two ends of described base plate are respectively
The cross bar being provided with a vertical bar and being located at described vertical bar side, described fixing device includes framework, is arranged in described framework
Keeper, be located on the left of described framework lean block and be located at described lean below block lean spring, described lean spring
Lower end be fixedly connected with the upper surface of described cross bar, the described upper end leaning spring is fixing even with the described lower surface leaning block
Connect, the described block that leans is in cuboid, and the described upper surface leaning block is contacted with the lower surface of described horizon bar, described horizon bar
Upper surface is contacted with described framework with the lower surface of cross bar, and the described spring that leans is in compressive state, and described keeper is in t word
Shape, one end of described keeper passes through the upper surface of described framework and leans described in acting against on the upper surface of block.
Described handle includes left part and right part, and described left part is in that a quarter is circular, and the one of described left part
End is fixedly connected with the upper surface of described gripper shoe, and described right part is in cuboid, described right part horizontal positioned, described right-hand member
The left end in portion is fixedly connected with the right-hand member of described left part.
Described body is in isosceles trapezoid, and the upper surface of described body is fixedly connected with the lower surface of described gripper shoe, described
The lower surface of body is provided with the first groove.
Described fix bar be in cuboid, the upper end of described fix bar be contained in described first groove and with described body shaft
Turn and connect, described fixed frame is in cuboid, and the lower surface of described fix bar is fixedly connected with the upper surface of described fixed frame, described
The lower surface of fixed frame is recessed upwards and forms a host cavity.
Described second support column is in cuboid, and described second support column is vertically placed, the lower surface of described second support column
It is fixedly connected with the upper surface of described base plate, the upper surface of described second support column is fixedly connected with the lower surface of described Magnet,
Described Magnet is in cuboid.
One end of described first spring is fixedly connected with the side of described fix bar, the other end of described first spring and institute
State first support to be fixedly connected, the upper end of described second spring is fixedly connected with described first support, described second spring another
One end is fixedly connected with the upper surface of described buckle block.
Described buckle block is in cuboid, the lower surface of described buckle block and the upper surface of described base plate, described buckle
Part is in l type, and one end of described fastener is fixedly connected with the upper surface of described base plate, the other end of described fastener and described card
The upper surface of button block.
Described first fixed block is in cuboid, and the upper surface of described first fixed block is fixed with the lower surface of described gripper shoe
Connect, the lower end of described first fixed block is provided with the second groove.
Described main part is in cuboid, and the upper end of described main part is contained in described second groove and solid with described first
Determine block axle and turn connection, the lower surface of described main part is recessed upwards and forms a positioning chamber.
Described locating rod is in cuboid, and one end of described locating rod is contained in described positioning chamber, under described locating rod
End be provided with the 3rd groove, described roller be in cylinder, described roller be contained in described 3rd groove and with described locating rod axle
Turn and connect.
After technique scheme, the present invention has the advantage that
The medical stretcher structure that the present invention improves safety is simple, easy to use it is only necessary to manual operation, and need not
The structures such as motor, gravity sensor, reduce cost, and it only needs rotatable positioning member, the anglec of rotation of adjustment gripper shoe simultaneously, makes
The patient obtaining in gripper shoe feels comfortable, simple to operate quick, and can arbitrarily be adjusted to need according to the demand of patient
The angle wanted, rather than can only be adjusted to horizontal, thus its feature richness, needs can be adjusted in the short period of time
Angle, improves the work efficiency of hospital, and its good fixing effect, and firm, can fully ensure patient in gripper shoe
Safety, prevents it from falling.
Brief description
The specific embodiment that below in conjunction with the accompanying drawings present invention is improved with the medical stretcher of safety is described further:
Fig. 1 improves the structural representation of the medical stretcher of safety for the present invention；
Specific embodiment
As shown in figure 1, the medical stretcher that the present invention improves safety includes gripper shoe 1, is located at described gripper shoe 1 top
Door handle device 2, it is located at the first attachment means 3 of described gripper shoe 1 lower section, is located at the second of described first attachment means 3 lower section
Attachment means 4, be located at described first attachment means 3 left and right sides elastic device 6, be located at described second attachment means 4 below
Base plate 5, be located at described elastic device 6 left and right sides holding apparatuss 7, be located at right side fixing device 8 and be located at described solid
Determine the holding rod 9 of device 8 lower section.
As shown in figure 1, described gripper shoe 1 is in cuboid, described gripper shoe 1 horizontal positioned.Described door handle device 2 includes sea
Continuous pad 21, handle 22 and the first support column 23 being located at described handle 22 lower section.Described foam-rubber cushion 21 is in cuboid, described sponge
The lower surface of pad 21 is fixedly connected with the upper surface of described gripper shoe 1, and head can be placed on foam-rubber cushion 21 when lying down by patient
On.Described handle 22 includes left part and right part, described left part be in a quarter circular, one end of described left part with
The upper surface of described gripper shoe 1 is fixedly connected, and described right part is in cuboid, described right part horizontal positioned, described right part
Left end be fixedly connected with the right-hand member of described left part.The upper surface shape in curved surface of described first support column 23, described first
The lower surface of dagger 23 is fixedly connected with the upper surface of described gripper shoe 1, the upper surface of described first support column 23 and a described left side
The lower surface of end is fixedly connected, thus playing preferable supporting role to described handle 22.When patient lies in gripper shoe 1
When, hand can be placed on so that hand has supported on handle 22, head is placed on foam-rubber cushion 21 simultaneously, decreases trouble
The sense of discomfort of person.
As shown in figure 1, described first attachment means 3 include body 31, are located at first of described body 31 left and right sides
Strut 32, be located at described first support bar 32 top second support bar 33, be located at described body 31 lower section fix bar 34 and
Fixed frame 35 positioned at described fix bar 34 lower section.Described body 31 be in isosceles trapezoid, the upper surface of described body 31 with described
The lower surface of gripper shoe 1 is fixedly connected, and the lower surface of described body 31 is provided with the first groove 311, and described first groove 311 is in
Rectangular-shaped.Described first support bar 32 is provided with two and is located at the left and right sides of described body 31 respectively, described first support
One end of bar 32 is fixedly connected with the side of described body 31, the other end of described first support bar 32 and described gripper shoe 1
Lower surface is fixedly connected, and described second support bar 33 is provided with two and is located at the left and right sides respectively, and described second support bar 33 is in
Cuboid, described second support bar 33 is vertically placed, the lower surface of the upper surface of described second support bar 33 and described gripper shoe 1
It is fixedly connected, the lower surface of described second support bar 33 is fixedly connected with described first support bar 32.Described fix bar 34 is in length
Cube, the upper end of described fix bar 34 is contained in described first groove 311 and is turned with described body 31 axle and is connected so that described
Fix bar 34 can rotate.Described fixed frame 35 is in cuboid, and the lower surface of described fix bar 34 is upper with described fixed frame 35
Surface is fixedly connected, and the lower surface of described fixed frame 35 is recessed upwards and forms a host cavity, and described host cavity is in rectangular-shaped, institute
State fixed frame 35 using ferrum or other can be made by the metal of attraction.
As shown in figure 1, described second attachment means 4 include the second support column 41 and are located above described second support column 41
Magnet 42.Described second support column 41 is in cuboid, and described second support column 41 is vertically placed, described second support column 41
Lower surface is fixedly connected with the upper surface of described base plate 5, the upper surface of described second support column 41 and the following table of described Magnet 42
Face is fixedly connected.Described Magnet 42 is in cuboid, described Magnet 42 horizontal positioned, and described Magnet 42 is contained in described host cavity
In.Described Magnet 42 attracts described fixed frame 35.
As shown in figure 1, described elastic device 6 is provided with two and is located at the left and right sides respectively, described elastic device 6 includes the
One support 61, the first spring 62 being located at described first support 61 side, the second spring positioned at described first support 61 lower section
63rd, it is located at the buckle block 64 of described second spring 63 lower section and the fastener 65 of buckle block 64 described in buckle.Described first support
61 is in z font, and one end of described first support 61 is fixedly connected with the side of described body 31, described first support 61 another
End is horizontal.Described first spring 62 is provided with two and is located at the left and right sides, one end of described first spring 62 and institute respectively
The side stating fix bar 34 is fixedly connected, and the other end of described first spring 62 is fixedly connected with described first support 61.Described
Second spring 63 is provided with two and is located at the left and right sides respectively, and the upper end of described second spring 63 is fixing with described first support 61
Connect, the other end of described second spring 63 is fixedly connected with the upper surface of described buckle block 64.Described buckle block 64 is in rectangular
Body, described buckle block 64 horizontal positioned, described buckle block 64 is snapped part 65 clamping post, and described buckle block 64 is in cuboid, institute
State the lower surface of buckle block 64 and the upper surface of described base plate 5.Described fastener 65 is provided with two and is located at left and right respectively
Both sides, described fastener 65 is in l type, and one end of described fastener 65 is fixedly connected with the upper surface of described base plate 5, described buckle
The other end of part 65 and the upper surface of described buckle block 64, thus buckle block 64 is stated in buckle post residence.
As shown in figure 1, described holding apparatuss 7 are provided with two and are located at the left and right sides respectively, described holding apparatuss 7 include the
One fixed block 76, the main part 71 being arranged on described first fixed block 76, be located at described main part 71 lower section locating rod 72,
Horizon bar 73 positioned at described main part 71 side, the roller 74 being arranged in described locating rod 72 and to be located at described roller 74 left
The rectangular shaft 75 of right both sides.Described first fixed block 76 is in cuboid, the upper surface of described first fixed block 76 and described support
The lower surface of plate 1 is fixedly connected, and the lower end of described first fixed block 76 is provided with the second groove 761, and described second groove 761 is in length
Cube shape.Described main part 71 be in cuboid, the upper end of described main part 71 be contained in described second groove 761 and with described
First fixed block 76 axle turns connection so that described main part 71 can rotate, the lower surface concave shape upwards of described main part 71
Become a positioning chamber 711, described positioning chamber 711 is in rectangular-shaped.Described horizon bar 73 is in cuboid, one end of described horizon bar 73
It is fixedly connected with the side of described main part 71, described horizon bar 73 horizontal positioned.Described locating rod 72 is in cuboid, described fixed
One end of position bar 72 is contained in described positioning chamber 711 and can move up and down, and it is recessed that the lower end of described locating rod 72 is provided with the 3rd
Groove 721, described 3rd groove 721 is in rectangular-shaped, and described roller 74 is in cylinder, and it is recessed that described roller 74 is contained in the described 3rd
Turn in groove 721 and with described locating rod 72 axle and be connected.Described rectangular shaft 75 is provided with two and is located at a left side for described roller 72 respectively
Right both sides, described rectangular shaft 75 cuboid, described rectangular shaft 75 is vertically placed.
As shown in figure 1, described base plate 5 is in cuboid, the left and right of described base plate 5 is respectively arranged at two ends with a vertical bar 51 and position
Cross bar 52 in described vertical bar 51 side.Described vertical bar 51 is in cuboid, and described vertical bar 51 is vertically placed, described base plate
5 side is fixedly connected with the side of described vertical bar 51, described cross bar 52 be in cuboid, one end of described cross bar 52 with described
Vertical bar 51 is fixedly connected, such that it is able to play the lower surface of rectangular shaft 75 described in preferable supporting role and described cross bar 52
Upper surface is fixedly connected, and described roller 74 acts against on the upper surface of described cross bar 52.
As shown in figure 1, described fixing device 8 includes framework 81, the keeper 82 being arranged in described framework 81, is located at institute
State framework 81 left side lean block 83 and be located at described lean block 83 lower section lean spring 84.The described lower end leaning spring 84
It is fixedly connected with the upper surface of described cross bar 52, the described upper end leaning spring 84 is fixed even with the described lower surface leaning block 83
Connect, the described block 83 that leans is in cuboid, and the described upper surface leaning block 83 is contacted with the lower surface of described horizon bar 73.Described frame
The concave shape that body 81 is put in side, the upper surface of described horizon bar 73 is contacted with described framework 81 with the lower surface of cross bar 52, thus
Prevent horizon bar 73 and described cross bar 52 overdistension.The described spring 84 that leans is in compressive state so that described lean block 83
Act against on the lower surface of horizon bar 73.Described keeper 82 is in t font, and one end of described keeper 82 passes through described framework 81
Upper surface and lean described in acting against on the upper surface of block 83, described keeper 82 is threadeded with described framework 81.
As shown in figure 1, described holding rod 9 is in bending, one end of described holding rod 9 is solid with the lower surface of described cross bar 52
Fixed connection, the other end of described holding rod 9 is horizontal.
As shown in figure 1, when the described present invention improves the medical stretcher use of safety, allowing patient lie in gripper shoe 1 first
On, or can be by hand placement on handle.When stair climbing, rotatable positioning member 82 is so that described keeper 82 acts against
Compressed so that gripper shoe 1 turns clockwise so that body 31 so that leaning spring 84 on the described upper surface leaning block 83
Around the upper end rotation of described fix bar 34, the second spring 63 positioned at right side and the first spring 62 are compressed, for the of left side
One spring and second spring are stretched.Described roller 74 rolls between described rectangular shaft 75.So far, the present invention improves safety
Medical stretcher finished using process description.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any
Those skilled in the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should cover
Within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by described scope of the claims.
Claims (10)
1. a kind of improve safety medical stretcher it is characterised in that: described improve safety medical stretcher include gripper shoe,
Door handle device above described gripper shoe, it is located at the first attachment means below described gripper shoe, is located at described first even
The second attachment means below connection device, it is located at the elastic device of the described first attachment means left and right sides, is located at described second
Base plate below attachment means, the holding apparatuss being located at the described elastic device left and right sides, the fixing device being located at right side and position
Holding rod below described fixing device, described door handle device includes foam-rubber cushion, handle and is located at below described handle the
One support column, described first attachment means include body, the first support bar being located at the described body left and right sides, are located at described the
Second support bar above one support bar, the fix bar below described body and the fixation below described fix bar
Frame, described second attachment means include the second support column and the Magnet above described second support column, described elastic device
Including first support, the first spring positioned at described first support side, the second spring below described first support, position
Buckle block below described second spring and the fastener of buckle block described in buckle, it is fixing that described holding apparatuss include first
Block, the main part being arranged on described first fixed block, be located at described main part below locating rod, be located at described main part one
The horizon bar of side, the roller being arranged in described locating rod and the rectangular shaft being located at the described roller left and right sides, described base plate
The cross bar that left and right is respectively arranged at two ends with a vertical bar and is located at described vertical bar side, described fixing device includes framework, setting
In the keeper in described framework, be located at described framework on the left of lean block and be located at described lean below block lean spring,
The described lower end leaning spring is fixedly connected with the upper surface of described cross bar, the described upper end leaning spring and the described block that leans
Lower surface is fixedly connected, and the described block that leans is in cuboid, and the described upper surface leaning block is contacted with the lower surface of described horizon bar,
The upper surface of described horizon bar is contacted with described framework with the lower surface of cross bar, and the described spring that leans is in compressive state, described
Keeper is in t font, and one end of described keeper passes through the upper surface of described framework and leans the upper surface of block described in acting against
On.
2. according to claim 1 improve safety medical stretcher it is characterised in that: described handle include left part and
Right part, described left part is in that a quarter is circular, and one end of described left part is fixing with the upper surface of described gripper shoe even
Connect, described right part is in cuboid, described right part horizontal positioned, the left end of described right part is solid with the right-hand member of described left part
Fixed connection.
3. according to claim 2 improve safety medical stretcher it is characterised in that: described body be in isosceles trapezoid,
The upper surface of described body is fixedly connected with the lower surface of described gripper shoe, and the lower surface of described body is provided with the first groove.
4. according to claim 3 improve safety medical stretcher it is characterised in that: described fix bar be in cuboid,
The upper end of described fix bar is contained in described first groove and is turned with described body shaft and is connected, and described fixed frame is in cuboid,
The lower surface of described fix bar is fixedly connected with the upper surface of described fixed frame, and the lower surface of described fixed frame is recessed upwards and is formed
One host cavity.
5. according to claim 4 improve safety medical stretcher it is characterised in that: described second support column be in rectangular
Body, described second support column is vertically placed, and the lower surface of described second support column is fixedly connected with the upper surface of described base plate, institute
The upper surface stating the second support column is fixedly connected with the lower surface of described Magnet, and described Magnet is in cuboid.
6. according to claim 5 improve safety medical stretcher it is characterised in that: one end of described first spring with
The side of described fix bar is fixedly connected, and the other end of described first spring is fixedly connected with described first support, and described second
The upper end of spring is fixedly connected with described first support, and the upper surface of the other end of described second spring and described buckle block is fixed
Connect.
7. according to claim 6 improve safety medical stretcher it is characterised in that: described buckle block be in cuboid,
The lower surface of described buckle block and the upper surface of described base plate, described fastener is in l type, one end of described fastener and institute
The upper surface stating base plate is fixedly connected, the upper surface of the other end of described fastener and described buckle block.
8. according to claim 7 improve safety medical stretcher it is characterised in that: described first fixed block be in rectangular
Body, the upper surface of described first fixed block is fixedly connected with the lower surface of described gripper shoe, and the lower end of described first fixed block sets
There is the second groove.
9. according to claim 8 improve safety medical stretcher it is characterised in that: described main part be in cuboid,
The upper end of described main part is contained in described second groove and is turned with described first fixed block axle and is connected, under described main part
Surface is recessed upwards and forms a positioning chamber.
10. according to claim 9 improve safety medical stretcher it is characterised in that: described locating rod be in cuboid,
One end of described locating rod is contained in described positioning chamber, and the lower end of described locating rod is provided with the 3rd groove, and described roller is in circle
Cylinder, described roller is contained in described 3rd groove and is turned with described locating rod axle and is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510272452.XA CN104825281B (en) | 2015-05-25 | 2015-05-25 | Medical stretcher improving safety |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510272452.XA CN104825281B (en) | 2015-05-25 | 2015-05-25 | Medical stretcher improving safety |
Publications (2)
| Publication Number | Publication Date |
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| CN104825281A CN104825281A (en) | 2015-08-12 |
| CN104825281B true CN104825281B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510272452.XA Expired - Fee Related CN104825281B (en) | 2015-05-25 | 2015-05-25 | Medical stretcher improving safety |
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| CN (1) | CN104825281B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556393A (en) * | 2015-09-25 | 2017-04-05 | 天津厚泽华达科技有限公司 | A kind of shock-proof type automobile navigation instrument |
| CN105115523A (en) * | 2015-09-26 | 2015-12-02 | 陈卡丹 | Novel calibrating device for road engineering measuring instruments |
| CN105232241B (en) * | 2015-10-20 | 2017-10-03 | 优弘智能医疗设备（重庆）有限公司 | A kind of Multifunctional heart Medical stretcher system |
| CN105919735B (en) * | 2016-06-15 | 2018-06-12 | 陈珊珊 | A kind of folding first aid stretcher |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4767148A (en) * | 1987-10-28 | 1988-08-30 | Ferno-Washington, Inc. | Multiple level roll-in cot |
| JP2962414B1 (en) * | 1998-07-28 | 1999-10-12 | パラマウントベッド株式会社 | Motorized bed having an extension / reverse extension mechanism with bottom horizontal detection means |
| US20040206555A1 (en) * | 2002-08-27 | 2004-10-21 | Schneider Mark S. | Stair chair |
| CN2860450Y (en) * | 2005-12-09 | 2007-01-24 | 公连花 | Convey angle adjustable medical stretcher |
| CN201094701Y (en) * | 2007-10-05 | 2008-08-06 | 顾佩青 | Mountain land stretcher |
| CN201328953Y (en) * | 2008-12-19 | 2009-10-21 | 冯周云 | Stretcher carrier |
| CN103230318B (en) * | 2013-05-13 | 2015-11-25 | 王文鹏 | Self-leveling Multifunctional rescue stretcher |
| CN204798146U (en) * | 2015-05-25 | 2015-11-25 | 王杨 | Improve medical stretcher of security |
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2015
- 2015-05-25 CN CN201510272452.XA patent/CN104825281B/en not_active Expired - Fee Related
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Inventor after: Ji Yanlei Inventor after: Han Zhen Inventor after: Hu Wenyu Inventor before: Wang Yang |
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