CN112869477A - Safety protection device for gradient walking of children - Google Patents
Safety protection device for gradient walking of children Download PDFInfo
- Publication number
- CN112869477A CN112869477A CN202110050216.9A CN202110050216A CN112869477A CN 112869477 A CN112869477 A CN 112869477A CN 202110050216 A CN202110050216 A CN 202110050216A CN 112869477 A CN112869477 A CN 112869477A
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- 230000000670 limiting effect Effects 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 23
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 2
- 241001272996 Polyphylla fullo Species 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 6
- 230000000474 nursing effect Effects 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 208000004350 Strabismus Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47D—FURNITURE SPECIALLY ADAPTED FOR CHILDREN
- A47D13/00—Other nursery furniture
- A47D13/04—Apparatus for helping babies to walk; Baby walkers or strollers
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Abstract
The invention provides a child slope walking safety protection device which comprises an Contraband-shaped frame, supporting units and a moving unit, wherein linkage grooves are symmetrically formed in the Contraband-shaped frame in the front and back direction, namely, 21274, the supporting units are arranged at the upper end of the Contraband-shaped frame, and the moving unit is arranged in the linkage grooves; the baby walker can solve the problems that most of the existing baby walkers are used when children walk, O-shaped legs are easy to cause after the children walk for a long time due to the fact that the baby walkers are supported by the baby walker, the leg development is influenced, and the moving mechanism of the baby walker adopts universal wheels, so that the walking route of the baby walker is easy to deviate when the children go up a slope, the baby walker is prone to topple, and the children are prone to being injured.
Description
Technical Field
The invention relates to the technical field of child walking safety protection, in particular to a child slope walking safety protection device.
Background
Generally, children have a strong desire to try to walk from 10 months to one and a half of the years of life, which is the prime time for the children to learn to walk, so parents can use the walker to help the children learn to walk. The walker is a tool for children to learn and walk in small seasons, can appropriately assist the children in learning and walking, has certain help for training coordination of limb actions of the children, and provides a convenient tool for the children to learn and walk on the premise of ensuring safety and correct use; the parents can go uphill when carrying the children out, so that necessary safety protection is provided for the children walking uphill.
However, the following problems exist in the current safety protection for children walking: at present children mostly use baby walker when the walking, because this type of walker carries out bearing formula support to children, consequently easily causes O type leg after children walk for a long time, influences the shank and develops, and the moving mechanism of this type of walker adopts the universal wheel, therefore the route of marcing that children easily caused walker when the upslope squints, and then causes empting of walker to easily cause the injury to children.
Disclosure of Invention
The technical problem to be solved
The child slope walking safety protection device provided by the invention can solve the problems pointed out in the background technology.
Two technical schemes
In order to achieve the above purposes, the invention adopts the following technical scheme that the child slope walking safety protection device comprises an Contraband-shaped frame, a supporting unit and a moving unit, wherein linkage grooves, i.e. 21274, are symmetrically formed in the Contraband-shaped frame in the front and back direction, the supporting unit is arranged at the upper end of the Contraband-shaped frame, and the moving unit is arranged in the linkage grooves, wherein:
contraband the inside horizontal spout of seting up rather than being linked together along the linkage groove inner wall bilateral symmetry of shape frame, and evenly seted up the groove of sliding from left to right along the linkage groove lower extreme, the connecting hole has been seted up to the groove lower extreme right side of sliding, sets up the groove of stepping down rather than being linked together along the connecting hole lower extreme.
The support unit includes bracing piece, rectangle frame, telescopic band, annular frame and annular sponge, wherein: the bracing piece evenly sets up on shape frame upper end outer wall, installs the rectangle frame along the bracing piece upper end, evenly installs the telescopic band along the rectangle frame inside wall, and the telescopic band other end is connected with the annular frame, and the linkage hole has been seted up to annular frame inside, installs the annular sponge that is used for protecting children along the downthehole lateral wall of linkage.
The mobile unit includes push pedal, expanding spring, bearing rod, gangbar, support spring rod, roof, spliced pole, removal wheel and spacing subassembly, wherein: the push plate is arranged in the transverse sliding groove in a sliding manner, the outer side wall of the right push plate is provided with a telescopic spring, the other end of the telescopic spring is arranged on the inner wall of the right end of the right transverse sliding groove, and the inner side wall of the push plate is provided with a bearing rod which is arranged in the linkage groove in a sliding way, the linkage rod which is arranged in the sliding groove in a sliding way is evenly connected along the lower end of the bearing rod from left to right, a fixed groove is arranged along the inner part of the linkage rod, a contact groove is arranged at the outer edge of the fixed groove at the right end of the linkage rod, the supporting spring rod is arranged in the fixed groove, and the other end of the supporting spring rod is rotatably provided with a top plate which is glidingly abutted in the connecting groove, the connecting column is glidingly arranged in the connecting hole and is connected with a supporting column along the upper end of the connecting column, and the lower end of the connecting column is provided with a supporting bracket which is arranged in the yielding groove in a sliding manner, the lower end of the supporting bracket is provided with an arc-shaped groove, the inner wall of the arc-shaped groove is provided with a moving wheel in a sliding manner, and the limiting assembly is arranged on the outer side wall of the left side push plate.
As a preferred technical scheme of the invention, the limiting assembly comprises a connecting rod, a baffle, a positioning plate, a linkage shaft, a poking disc, a rotating cam, an execution feeler lever and a contraction spring, wherein: the connecting rod is arranged on the outer side wall of the left push plate, a baffle is arranged along the left end of the connecting rod, the positioning plate is arranged on the outer wall of the left end of the Contraband-shaped frame on the upper side of the baffle, and the positioning plate is provided with a clamping groove, a transmission groove is arranged along the inner part of the baffle plate, a supporting hole communicated with the transmission groove is arranged along the upper end of the transmission groove, the left end of the transmission groove is provided with a rotating groove communicated with the transmission groove, and the left end of the transmission groove is uniformly provided with a limiting groove circumferentially by taking the rotating groove as the center of a circle, wherein one end of the linkage shaft is arranged on the inner wall of the transmission groove in a sliding way, the other end of the linkage shaft is arranged in the rotating groove in a sliding way, a poking disc is sleeved along the left end of the linkage shaft, and the right side of the linkage shaft is sleeved with a rotating cam which is arranged in the transmission groove in a sliding way, the outer wall of the rotating cam is provided with a guide groove, an execution contact rod is glidingly abutted along the upper end of the rotating cam, and the other end of the execution contact rod is arranged in the supporting hole in a sliding mode, and the tail end of the execution contact rod is arranged in the clamping groove in a sliding mode.
As a preferable technical scheme of the invention, the inner wall of the right end of the sliding groove is of a semicircular structure for preventing the limiting supporting column from rotating.
As a preferred technical scheme of the invention, the supporting rod and the outer wall of the rectangular frame are sleeved with sponge sleeves for protecting children.
As a preferable technical scheme of the invention, the supporting column is of a regular hexagon structure which is used for being in interference fit with the top plate.
As a preferred technical scheme of the invention, the inner side wall of the toggle disc is uniformly provided with limiting columns which slide and abut against the limiting grooves in the circumferential direction by taking the universal driving shaft as a circle center.
Three beneficial effects
1. The walking aid greatly improves the safety protection of children when walking, and can solve the problems that most of the children use baby walkers when walking at present, O-shaped legs are easy to cause after the children walk for a long time and the development of legs is influenced because the walkers support the children in a bearing mode, and the walking aid is easy to cause the deviation of the walking route of the walkers when the children go up slopes and further cause the toppling of the walkers, so that the children are easy to be injured and the like.
2. The supporting unit is arranged, so that the waist of a child can be effectively protected, and the position of the child can be prevented from being deviated, so that O-shaped legs of the child can be avoided, the child can be prevented from being deviated, and the device can be prevented from falling.
3. The invention is provided with the moving unit, so that resistance can be applied to the moving wheel when a child ascends a slope, the flexibility of radial rotation of the moving wheel is reduced, the child can be prevented from deviating when ascending the slope, the safety of the device can be improved, and the child can be prevented from being injured by footsteps when ascending the slope.
4. The limiting assembly is arranged, so that the moving unit can be continuously limited, and resistance can be continuously applied to the moving wheel by matching with the moving unit.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a front sectional view of the present invention.
Fig. 3 is a top sectional view of the supporting unit of the present invention.
Figure 4 is a top cross-sectional view of the push plate, the extension spring and the support bar of the present invention.
Fig. 5 is a partial enlarged view of fig. 2 a of the present invention.
Fig. 6 is a sectional view taken along line B-B of fig. 2 of the present invention.
Fig. 7 is a partial structural schematic view of the spacing assembly of the present invention.
Fig. 8 is a partial perspective view of the stop assembly of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
The child slope walking safety protection device shown in fig. 1 to 8 comprises Contraband-shaped frames 1, supporting units 2 and moving units 3, wherein linkage grooves 11 are symmetrically formed in the Contraband-shaped frames 1 in a front-back mode, the supporting units 2 are arranged at the upper ends of the Contraband-shaped frames 1, and the moving units 3 are arranged in the linkage grooves 11, wherein:
the Contraband-shaped frame 1 is internally provided with transverse sliding grooves 12 communicated with the linkage groove 11 in a bilateral symmetry manner along the inner wall of the linkage groove 11, and is also provided with sliding grooves 13 uniformly from left to right along the lower end of the linkage groove 11, and the inner wall of the right end of each sliding groove 13 is of a semicircular structure; the right side of the lower end of the sliding groove 13 is provided with a connecting hole 14, and a yielding groove 15 communicated with the connecting hole 14 is arranged along the lower end of the connecting hole 14.
The supporting unit 2 includes a supporting rod 21, a rectangular frame 22, a telescopic band 23, an annular frame 24 and an annular sponge 25, wherein: the support rods 21 are uniformly arranged on the outer wall of the upper end of the v-shaped frame 1, the rectangular frame 22 is arranged along the upper end of the support rods 21, and sponge sleeves 211 for protecting children are sleeved on the outer walls of the support rods 21 and the rectangular frame 22; the telescopic belts 23 are uniformly arranged along the inner side walls of the rectangular frames 22, the other ends of the telescopic belts 23 are connected with the annular frame 24, linkage holes 241 are formed in the annular frame 24, and annular sponges 25 for protecting children are arranged along the inner side walls of the linkage holes 241; during specific work, a child is placed in the annular frame 24, the annular frame 24 protects the child through the annular sponge 25 to prevent discomfort of the child, and during the work, the annular frame 24 ensures that the child is located at the center of the device through the telescopic belt 23 to prevent the child from being deviated in position and toppling over.
The moving unit 3 comprises a push plate 31, a telescopic spring 32, a bearing rod 33, a linkage rod 34, a supporting spring rod 35, a top plate 36, a connecting column 37, a moving wheel 38 and a limiting component 39, wherein: the push plate 31 is arranged in the transverse sliding groove 12 in a sliding mode, the outer side wall of the right push plate 31 is provided with a telescopic spring 32, the other end of the telescopic spring 32 is installed on the inner wall of the right end of the right transverse sliding groove 12, the inner side wall of the push plate 31 is provided with a bearing rod 33 which is arranged in the linkage groove 11 in a sliding mode, the linkage rod 34 which is arranged in the sliding groove 13 in a sliding mode is evenly connected to the lower end of the bearing rod 33 from left to right, a fixing groove 341 is formed in the linkage rod 34, a collision groove 342 is formed in the outer edge of the fixing groove 341 in the right end of the linkage rod 34, the supporting spring rod 35 is installed in the fixing groove 341, the other end of the supporting spring rod 35 is rotatably provided with a top plate 36 which is in sliding collision in the connecting groove, the connecting post; the lower end of the connecting column 37 is provided with a supporting bracket 372 arranged in the abdicating groove 15 in a sliding manner, the lower end of the supporting bracket 372 is provided with an arc-shaped groove 373, the inner wall of the arc-shaped groove 373 is provided with a moving wheel 38 in a sliding manner, and the limiting component 39 is arranged on the outer side wall of the left push plate 31; when the device works specifically, a caregiver pushes the push plate 31 through the limiting component 39, the push plate 31 drives the supporting rod 33 to move towards the right side, the supporting rod 33 drives the linkage rod 34 to move towards the right side, at the moment, the linkage rod 34 drives the top plate 36 to abut against the outer wall of the connecting column 37 through the supporting spring rod 35, so that the resistance of the connecting column 37 in rotation is increased, the flexibility of radial rotation of the moving wheel 38 is reduced, and the device is prevented from deviating when located in an uphill road section; after going up the slope road section, the caregiver withdraws the push plate 31 to reset through the limiting assembly 39, at the moment, the right push plate 31 withdraws to reset under the action of the telescopic spring 32, and then the push plate 31 drives the supporting rod 33 and the linkage rod 34 to withdraw to reset, so that the limiting effect on the connecting column 37 is eliminated.
The position limiting assembly 39 comprises a connecting rod 391, a baffle 392, a positioning plate 393, a linkage shaft 394, a toggle plate 395, a rotating cam 396, an actuating trolley 397 and a retraction spring 398, wherein: the connecting rod 391 is installed on the outer side wall of the left push plate 31, the baffle 392 is installed along the left end of the connecting rod 391, the positioning plate 393 is installed on the outer wall of the left end of the Contraband-shaped frame 1 on the upper side of the baffle 392, the positioning plate 393 is provided with a clamping groove 3931, the transmission groove 3921 is arranged along the inner part of the baffle 392, the upper end of the transmission groove 3921 is provided with a support hole 3922 communicated with the transmission groove 3922, the left end of the transmission groove 3921 is provided with a rotating groove 3923 communicated with the transmission groove, the left end of the transmission groove 3921 is circumferentially and uniformly provided with a limiting groove 3924 by taking the rotating groove 3923 as the circle center, one end of the linkage 394 is slidably arranged on the inner wall of the transmission groove 3921, the other end of the linkage 394 is slidably arranged in the rotating groove 3923, the poking disc 395 is sleeved on the left end of the linkage 394, and the; and the right side of the linkage shaft 394 is sleeved with a rotating cam 396 which is slidably arranged in the transmission groove 3921, the outer wall of the rotating cam 396 is provided with a guide groove 3961, an execution contact rod 397 slides and abuts against the upper end of the rotating cam 396, the other end of the execution contact rod 397 is slidably arranged in the support hole 3922, and the tail end of the execution contact rod 397 is slidably arranged in the clamping groove 3931.
When the medical nursing bed works specifically, a caregiver pushes the baffle 392 to the right side, so that the baffle 392 is matched with the connecting rod 391 to push the push plate 31 to the right side, the poking disc 395 is rotated at the moment, the poking disc 395 drives the rotating cam 396 to rotate through the linkage shaft 394, the rotating cam 396 drives the execution contact rod 397 to move upwards into the clamping groove 3931 during the period, so that the baffle 392 is limited and fixed, the push plate 31 is limited and fixed, and the caregiver pushes the poking disc 395 to insert the limiting column 3951 into the limiting groove 3924 so as to prevent the poking disc 395 from loosening; after the work is accomplished, the nursing staff will dial the dish 395 and extract, and rotate and dial the dish 395, dial the dish 395 and drive through universal driving shaft 394 and rotate cam 396 and rotate, and the feeler lever 397 is executed in the period will be withdrawed under the effect of shrink spring 398 and reset, makes the spacing effect of elimination to baffle 392 and removal wheel 38.
During operation
The first step is as follows: the carer places the child in the ring-shaped frame 24. the ring-shaped frame 24 will protect the child from discomfort by the ring-shaped sponge 25, during which the ring-shaped frame 24 secures the child in the center of the device by the telescopic strap 23 to prevent the child from shifting its position and causing the device to topple.
The second step is that: the caregiver pushes the push plate 31 through the limiting component 39, the push plate 31 drives the supporting rod 33 to move towards the right side, the supporting rod 33 drives the linkage rod 34 to move towards the right side, the linkage rod 34 drives the top plate 36 to abut against the outer wall of the connecting column 37 through the supporting spring rod 35 at the moment, resistance when the connecting column 37 rotates is increased, flexibility of radial rotation of the moving wheel 38 is reduced, and deviation is prevented when the device is located on an uphill road section.
The third step: the nursing personnel pushes the baffle 392 to the right side, so that the baffle 392 is matched with the connecting rod 391 to push the push plate 31 to the right side, the poking disc 395 is rotated at the moment, the poking disc 395 drives the rotating cam 396 to rotate through the linkage shaft 394, the rotating cam 396 drives the execution contact rod 397 to move upwards into the clamping groove 3931 during the period, so that the baffle 392 is limited and fixed, the push plate 31 is limited and fixed, and at the moment, the nursing personnel pushes the poking disc 395 to insert the limiting column 3951 into the limiting groove 3924 to prevent the poking disc 395 from loosening; after the uphill road section, the nurse will dial driving disk 395 and extract, and rotate and dial driving disk 395, dial driving disk 395 and drive through universal driving shaft 394 and rotate cam 396 and rotate, during this time, it will withdraw under the effect of shrink spring 398 and reset to execute feeler lever 397, make and eliminate the spacing effect to baffle 392, right side push pedal 31 withdraws under the effect of expanding spring 32 and resets this moment, and then drive supporting rod 33 and gangbar 34 through push pedal 31 and withdraw and reset, thereby eliminate the spacing effect to spliced pole 37 and removal wheel 38.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a children slope walking safety device, includes Contraband shape frame (1), support element (2) and mobile unit (3), its characterized in that: linkage grooves (11), 21274, are symmetrically formed in the Contraband-shaped frame (1) in the front and back direction, a supporting unit (2) is arranged at the upper end of the Contraband-shaped frame (1), and a moving unit (3) is arranged in the linkage grooves (11), wherein:
the Contraband-shaped frame (1) is internally provided with transverse sliding grooves (12) communicated with the linkage groove (11) in a bilateral symmetry mode along the inner wall of the linkage groove, the lower end of the linkage groove (11) is uniformly provided with sliding grooves (13) from left to right, the right side of the lower end of each sliding groove (13) is provided with a connecting hole (14), and the lower end of each connecting hole (14) is provided with a abdicating groove (15) communicated with the connecting hole;
the supporting unit (2) comprises a supporting rod (21), a rectangular frame (22), a telescopic belt (23), an annular frame (24) and an annular sponge (25), wherein: the supporting rods (21) are uniformly arranged on the outer wall of the upper end of the Contraband-shaped frame (1), the rectangular frame (22) is arranged along the upper end of the supporting rods (21), the telescopic belts (23) are uniformly arranged along the inner side wall of the rectangular frame (22), the other end of each telescopic belt (23) is connected with the annular frame (24), the annular frame (24) is internally provided with a linkage hole (241), and the annular sponge (25) for protecting children is arranged along the inner side wall of each linkage hole (241);
the mobile unit (3) comprises a push plate (31), a telescopic spring (32), a supporting rod (33), a linkage rod (34), a supporting spring rod (35), a top plate (36), a connecting column (37), a mobile wheel (38) and a limiting component (39), wherein: the push plate (31) is arranged in the transverse sliding groove (12) in a sliding manner, the outer side wall of the right push plate (31) is provided with a telescopic spring (32), the other end of the telescopic spring (32) is arranged on the inner wall of the right end of the right transverse sliding groove (12), the inner side wall of the push plate (31) is provided with a bearing rod (33) which is arranged in the linkage groove (11) in a sliding manner, the lower end of the bearing rod (33) is uniformly connected with a linkage rod (34) which is arranged in the sliding groove (13) in a sliding manner from left to right, a fixed groove (341) is formed inside the linkage rod (34), a collision groove (342) is formed in the outer edge of the fixed groove (341) at the right end of the linkage rod (34), the supporting spring rod (35) is arranged in the fixed groove (341), the other end of the supporting spring rod (35) is rotatably provided with a, be connected with support column (371) along spliced pole (37) upper end, and spliced pole (37) lower extreme is installed and is slided and set up support bracket (372) in groove (15) of stepping down, and support bracket (372) lower extreme has seted up arc wall (373), and arc wall (373) inner wall slides and is provided with removal wheel (38), and spacing subassembly (39) are installed on left side push pedal (31) lateral wall.
2. The safety device for children walking on slopes as claimed in claim 1, wherein: the limiting assembly (39) comprises a connecting rod (391), a baffle plate (392), a positioning plate (393), a linkage shaft (394), a toggle plate (395), a rotating cam (396), an execution trolley (397) and a contraction spring (398), wherein: the connecting rod (391) is arranged on the outer side wall of the left side push plate (31), the baffle (392) is arranged along the left end of the connecting rod (391), the positioning plate (393) is arranged on the outer wall of the left end of the Contraband-shaped frame (1) on the upper side of the baffle (392), the positioning plate (393) is provided with a clamping groove (3931), the baffle (392) is internally provided with a transmission groove (3921), the upper end of the transmission groove (3921) is provided with a supporting hole (3922) communicated with the transmission groove, the left end of the transmission groove (3921) is provided with a rotating groove (3923) communicated with the transmission groove, the left end of the transmission groove (3921) is circumferentially and uniformly provided with a limiting groove (3924) by taking the rotating groove (3923) as the circle center, one end of the linkage shaft (394) is arranged on the inner wall of the transmission groove (3921) in a sliding manner, the other end of the linkage shaft (394) is arranged in the rotating groove (3923) in a sliding manner, the left end sleeve of the linkage shaft (394) is provided, the guide way (3961) has been seted up to the outer wall of rotation cam (396), has slided along rotation cam (396) upper end and has collided and carry out feeler lever (397), and carries out feeler lever (397) other end and slide and set up in supporting hole (3922), and carries out feeler lever (397) end and slide and set up in joint groove (3931).
3. The safety device for children walking on slopes as claimed in claim 1, wherein: the inner wall of the right end of the sliding groove (13) is of a semicircular structure for preventing the limiting support column (371) from rotating.
4. The safety device for children walking on slopes as claimed in claim 1, wherein: the outer walls of the support rod (21) and the rectangular frame (22) are all sleeved with sponge sleeves (211) used for protecting children.
5. The safety device for children walking on slopes as claimed in claim 1, wherein: the supporting column (371) is of a regular hexagon structure which is used for being in interference fit with the top plate (36).
6. The safety device for children walking on slopes as claimed in claim 2, wherein: the inner side wall of the poking disc (395) is uniformly provided with limiting columns (3951) which slide and abut against the limiting grooves (3924) in the circumferential direction by taking the linkage shaft (394) as a circle center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110050216.9A CN112869477B (en) | 2021-01-14 | 2021-01-14 | Safety protection device for gradient walking of children |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110050216.9A CN112869477B (en) | 2021-01-14 | 2021-01-14 | Safety protection device for gradient walking of children |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112869477A true CN112869477A (en) | 2021-06-01 |
| CN112869477B CN112869477B (en) | 2022-04-26 |
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ID=76049301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110050216.9A Active CN112869477B (en) | 2021-01-14 | 2021-01-14 | Safety protection device for gradient walking of children |
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| Country | Link |
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| CN (1) | CN112869477B (en) |
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| Publication number | Publication date |
|---|---|
| CN112869477B (en) | 2022-04-26 |
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