CN107878544A - A kind of foldable baby stroller - Google Patents
A kind of foldable baby stroller Download PDFInfo
- Publication number
- CN107878544A CN107878544A CN201711365491.XA CN201711365491A CN107878544A CN 107878544 A CN107878544 A CN 107878544A CN 201711365491 A CN201711365491 A CN 201711365491A CN 107878544 A CN107878544 A CN 107878544A
- Authority
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- China
- Prior art keywords
- component
- push
- rod
- poppet
- moving part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 230000007246 mechanism Effects 0.000 claims abstract description 41
- 238000010276 construction Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
- B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
- B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
- B62B7/08—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable in the direction of, or at right angles to, the wheel axis
- B62B7/083—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable in the direction of, or at right angles to, the wheel axis the wheel axes being moved from each other during folding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
Abstract
The invention discloses a kind of foldable baby stroller, it is used to enter it line-locked first locking mechanism including vehicle frame and when vehicle frame is in the deployed, vehicle frame includes push-rod assembly, fore-stock component, after-poppet component, bottom folding support rod component, double-action plate, upper strut component and lower supporting rod component, fore-stock component upper end, after-poppet component upper end and the coaxial pin joint in push-rod assembly lower end, bottom folding support rod component is rotatably connected between fore-stock component and after-poppet component, upper strut component top is rotatablely connected with push-rod assembly, lower supporting rod component top is connected with upper strut component lower rotational, lower supporting rod component bottom is rotatablely connected with after-poppet component, the both ends of the double-action plate extension with lower supporting rod component lower end respectively, bottom folding support rod component rotation connection；The present invention is below vehicle frame and rear forms a four side mechanisms respectively, drives vehicle frame foldable integral to collapse by two 4 side mechanisms during folding, simple in construction and novel, cost is relatively low, easy to operate.
Description
Technical field
The present invention relates to a kind of foldable baby stroller.
Background technology
The doll carriage instrument indispensable as a kind of infant trip, is used by users.User exists at present
Outside firm, safety the basic demand for pursuing doll carriage, increasingly pay attention to the small volume, light, foldable of doll carriage
The features such as.
Before doll carriage of the prior art, including the vehicle frame with expanded position and folding position, setting and vehicle frame bottom
The front component in portion, the wheel assembly for being arranged at vehicle frame bottom rear portion, the locking mechanism being locked in vehicle frame under expanded position, set
In the Zuo Dou mechanisms taken for people on vehicle frame.The species of the vehicle frame of existing doll carriage is various, and the rod member number of vehicle frame is different,
Annexation, link position between each rod member is different, so as to which folding principle and folding mode are different.
The content of the invention
The present invention seeks to：A kind of foldable baby stroller is provided, its forward and backward bracket component and bottom folding support rod component it
Between in a vehicle frame four side mechanisms formed below, between its push-rod assembly, after-poppet component, upper strut component and lower supporting rod component
Passing through above-mentioned two 4 side mechanism in vehicle frame rear one four side mechanism of formation, folding drives vehicle frame foldable integral to collapse, structure
Simple and novel, cost is relatively low, easy to operate.
The technical scheme is that：A kind of foldable baby stroller, including the car with expanded position and folding position
Frame and when vehicle frame is in the deployed be used for enter line-locked first locking mechanism to vehicle frame, the vehicle frame includes push rod
Component, fore-stock component, after-poppet component, the front component being arranged on below fore-stock component and it is arranged on after-poppet component
The wheel assembly of lower section, the vehicle frame also include bottom folding support rod component, double-action plate, upper strut component and lower supporting rod component, institute
Fore-stock component upper end, after-poppet component upper end and the coaxial pin joint in push-rod assembly lower end are stated, the bottom folding support rod component rotates
It is connected between fore-stock component and after-poppet component, the upper strut component top is rotatablely connected with push-rod assembly, under described
Strut component top is connected with upper strut component lower rotational, and lower supporting rod component bottom is rotatablely connected with after-poppet component, described
The extension of double-action plate one end and lower supporting rod component lower end is rotatablely connected, and the other end is rotatablely connected with bottom folding support rod component；
During vehicle frame folding, push-rod assembly and the fore-stock component is collapsed in the both sides of after-poppet component, the bottom folding support rod
It is folded up collapsing between fore-stock component and after-poppet component in the middle part of component, double-action plate drives lower supporting rod component top forward
Collapse and collapsed in after-poppet component, upper strut component top as push-rod assembly downwardly turns in push-rod assembly and pusher bar assembly
Between.
Preferably, the push-rod assembly includes bottom and fore-stock component and push rod, the Yi Jishe of after-poppet component pin joint
The sliding part that can be slided on push rod and along push rod is put, top and the sliding part of the upper strut component are rotatablely connected, described
Sliding part has the first latched position and the second latched position, and the push rod is provided with can be respectively in first, second latched position
Enter line-locked second locking mechanism to the sliding part, the push-rod assembly has the first operating position and the second working position
Put；
When push-rod assembly is in the first operating position, push-rod assembly is located at the top of after-poppet component, and the sliding part is in
First latched position is simultaneously locked by second locking mechanism, and now the direction of occupant is consistent with the direction for pushing away passerby；
When push-rod assembly is in the second operating position, push-rod assembly is located at the top of fore-stock component, and the sliding part is in
Second latched position is simultaneously locked by second locking mechanism, and now the direction of occupant is relative with the direction for pushing away passerby.
Preferably, the push-rod assembly also includes handle, and the handle is rotationally connected with push rod upper end, and sets between the two
There is the 3rd locking mechanism.
Preferably, the bottom folding support rod component includes preceding moving part and rear moving part, the rear portion of the preceding moving part with
The front portion rotation connection of moving part afterwards, front portion and the fore-stock component of the preceding moving part are rotatablely connected, the rear moving part
Rear portion and after-poppet component be rotatablely connected.
Preferably, the extension of the lower supporting rod component lower end is extended back, and the upper end of the double-action plate is prolonged with this
Extending portion is rotatablely connected, and the lower end of the double-action plate is rotatablely connected with the rear moving part, and the rotation of double-action plate and rear moving part
Link position is located at rear moving part and the front side of the rotation connection position of after-poppet component.
Preferably, the first locking mechanism is arranged at the rotation connection of preceding moving part and rear moving part.
Preferably, the front portion of the preceding moving part is formed with foot pedal.
It is an advantage of the invention that：
1st, the present invention between forward and backward bracket component and forward and backward moving part in a vehicle frame four side mechanisms formed below, its push rod
Lead between component, after-poppet component, upper strut component and lower supporting rod component in vehicle frame rear one four side mechanism of formation, folding
Crossing above-mentioned two 4 side mechanism drives vehicle frame foldable integral to collapse, and simple in construction and novel, cost is relatively low, easy to operate；It is in addition, whole
Car rod member is less, is not likely to produce during folding and interferes.
2nd, the achievable push rod direction-changing of the present invention, when push-rod assembly needs conversion work position, as long as releasing the second locking
Locking of the mechanism to sliding sleeve, then front and rear rotating push-rod component is to required commutation position, when push-rod assembly turns to accordingly
Commutation position when, second locking mechanism can lock to sliding sleeve again, and switch operation is very convenient.
Brief description of the drawings
Below in conjunction with the accompanying drawings and embodiment the invention will be further described：
Fig. 1 is in structural representation during the first operating position for push-rod assembly in the present invention；
Fig. 2 is in side structure schematic diagram during the first operating position for push-rod assembly in the present invention；
Fig. 3 is the structural representation that the present invention is in folding process；
Fig. 4 is structural representation of the present invention after folding；
Fig. 5 is the structural representation that push-rod assembly is in commutation process in the present invention；
Fig. 6 is the side structure schematic diagram that push-rod assembly is in commutation process in the present invention；
Fig. 7 is in structural representation during the second operating position for push-rod assembly in the present invention；
Fig. 8 is in structural representation during the second operating position for push-rod assembly in the present invention.
Wherein：1 push-rod assembly；1-1 push rods；1-2 sliding parts；1-3 handles；
2 fore-stock components；
3 after-poppet components；
4 front components；
5 wheel assemblies；
6 bottom folding support rod components；Moving part before 6-1；Moving part after 6-2；
7 double-action plates；
Strut component on 8；
9 lower supporting rod components；
10 foot pedals.
Embodiment
Embodiment：As shown in Figures 1 to 4, a kind of foldable baby stroller, including with expanded position and folding position
Vehicle frame and it is used to enter vehicle frame line-locked first locking mechanism when vehicle frame is in the deployed, the vehicle frame includes pushing away
Bar assembly 1, fore-stock component 2, after-poppet component 3, the front component 4 for being arranged on the lower section of fore-stock component 2 and after being arranged on
The wheel assembly 5 of the lower section of bracket component 3, the vehicle frame also include bottom folding support rod component 6, double-action plate 7, upper strut component 8 and
Lower supporting rod component 9, the upper end of fore-stock component 2, the upper end of after-poppet component 3 and the coaxial pin joint in the lower end of push-rod assembly 1, the bottom
Folding support rod component 6 is rotatably connected between fore-stock component 2 and after-poppet component 3, the upper top of strut component 8 and push rod
Component 1 is rotatablely connected, and the top of lower supporting rod component 9 is connected with the upper lower rotational of strut component 8, the bottom of lower supporting rod component 9 with
After-poppet component 3 is rotatablely connected, and the extension of described one end of double-action plate 7 and the lower end of lower supporting rod component 9 is rotatablely connected, the other end with
Bottom folding support rod component 6 is rotatablely connected.
During vehicle frame folding, the push-rod assembly 1 and fore-stock component 2 are collapsed in the both sides of after-poppet component 3, the bottom folding
The folded middle part of strut component 6 is folded up collapsing between fore-stock component 2 and after-poppet component 3, and double-action plate 7 drives lower supporting rod group
The top forward of part 9 collapses to be collapsed in push rod group in after-poppet component 3, the upper top of strut component 8 as push-rod assembly 1 downwardly turns over
Between part 1 and pusher bar assembly 3.
As shown in Figure 1, Figure 2 and shown in Fig. 5 to Fig. 8, the various situations of baby in stroller are observed for convenience, and this stroller is provided with
Commutation function, it is specific as follows：The push-rod assembly 1 includes bottom and fore-stock component 2 and the push rod 1- of the pin joint of after-poppet component 3
The 1 and sliding part 1-2 that is arranged on push rod 1-1 and can be slided along push rod, the top of the upper strut component 8 and slip
Part 1-2 is rotatablely connected, and the sliding part 1-2 has the first latched position and the second latched position, and the push rod 1-1 is provided with can
Enter line-locked second locking mechanism to the sliding part 1-2 in first, second latched position respectively, the push-rod assembly 1 has
There are the first operating position and the second operating position.Above-mentioned second locking mechanism is the relatively conventional prior art in this area, herein
No longer its structure is repeated and limited.
When push-rod assembly 1 is in the first operating position, push-rod assembly 1 is located at the top of after-poppet component 3, the slip
Part 1-2 is in the first latched position and locked by second locking mechanism, and now the direction of occupant is consistent with the direction for pushing away passerby.
When push-rod assembly 1 is in the second operating position, push-rod assembly 1 is located at the top of fore-stock component 2, the slip
Part 1-2 is in the second latched position and locked by second locking mechanism, and now the direction of occupant is relative with the direction for pushing away passerby.
When stroller needs commutation, it is only necessary to release locking of the second locking mechanism to sliding part 1-2, now overturn push rod group
Part, sliding part 1-2 slide along push-rod assembly 1, and when push-rod assembly 1 commutates in place, second locking mechanism locks slip again
Part 1-2, switch operation are very convenient.
As shown in Figures 1 to 8, in the present embodiment, the push-rod assembly 1 also includes handle 1-3, the handle 1-3 rotations
Push rod 1-1 upper ends are connected to, and are provided with the 3rd locking mechanism between the two.Above-mentioned 3rd locking mechanism is that this area is relatively conventional
Prior art, no longer its structure is repeated and limited herein.
In the present embodiment, the bottom folding support rod component 6 includes preceding moving part 6-1 and rear moving part 6-2, is interlocked before described
Part 6-1 rear portion and rear moving part 6-2 anterior rotation connection, the front portion of the preceding moving part 6-1 rotate with fore-stock component 2
Connection, the rear portion of the rear moving part 6-2 are rotatablely connected with after-poppet component 3.
In the present embodiment, the extension of the lower end of lower supporting rod component 9 extends back, the upper end of the double-action plate 7
It is rotatablely connected with the extension, the lower end of the double-action plate 7 is rotatablely connected with the rear moving part 6-2, and double-action plate 7 connects with after
Moving part 6-2 rotation connection position is located at rear moving part 6-2 and the front side of the rotation connection position of after-poppet component.
In the present embodiment, the first locking mechanism is arranged on preceding moving part 6-1 and rear moving part 6-2 rotation connection
Place.The setting of the locking mechanism position can avoid maloperation.Above-mentioned first locking mechanism is relatively conventional existing in this area
Technology, no longer its structure is repeated and limited herein.
Shelved for the ease of occupant foot, the front portion of the preceding moving part 6-1 is provided with foot pedal 10.
The folding principle of the present invention is as follows：The first operating position is in push-rod assembly 1, releases the lock of the 3rd locking mechanism
It is fixed, then rotate forward and push handle 1-3, now handle 1-3 is relative with push rod 1-1 collapses, and then releases the first locking machine
The locking of structure, the middle part of bottom folding support rod component 6 is set to be folded up collapsing, fore-stock component 2 collapses therewith with after-poppet component 3,
And driving the top forward of lower supporting rod component 9 to collapse in after-poppet component 3 in double-action plate 7, the upper top of strut component 8 is with push rod group
Part 1, which continues to downwardly turn over, to be collapsed between push-rod assembly 1 and pusher bar assembly 3.
In a vehicle frame four side mechanisms formed below between forward and backward bracket component and forward and backward moving part in the present invention, it is pushed away
Between bar assembly, after-poppet component, upper strut component and lower supporting rod component in vehicle frame rear one four side mechanism of formation, folding
Vehicle frame foldable integral is driven to collapse by above-mentioned two 4 side mechanism, simple in construction and novel, cost is relatively low, easy to operate；In addition,
Vehicle rod member is less, is not likely to produce during folding and interferes.
It the above is only the concrete application example of the present invention, protection scope of the present invention be not limited in any way.Except above-mentioned
Outside embodiment, the present invention can also have other embodiment.All technical schemes formed using equivalent substitution or equivalent transformation,
Fall within scope of the present invention.
Claims (7)
1. a kind of foldable baby stroller, including the vehicle frame with expanded position and folding position and it is in expansion in vehicle frame
It is used to enter vehicle frame line-locked first locking mechanism during position, the vehicle frame includes push-rod assembly（1）, fore-stock component（2）、
After-poppet component（3）, be arranged on fore-stock component（2）The front component of lower section（4）And it is arranged on after-poppet component（3）Lower section
Wheel assembly（5）, it is characterised in that：The vehicle frame also includes bottom folding support rod component（6）, double-action plate（7）, upper strut component
（8）And lower supporting rod component（9）, the fore-stock component（2）Upper end, after-poppet component（3）Upper end and push-rod assembly（1）Lower end is same
Pivot pin connects, the bottom folding support rod component（6）It is rotatably connected on fore-stock component（2）With after-poppet component（3）Between, it is described on
Strut component（8）Top and push-rod assembly（1）Rotation connection, the lower supporting rod component（9）Top and upper strut component（8）Bottom
Rotation connection, lower supporting rod component（9）Bottom and after-poppet component（3）Rotation connection, the double-action plate（7）One end and lower supporting rod group
Part（9）The extension rotation connection of lower end, the other end and bottom folding support rod component（6）Rotation connection；
During vehicle frame folding, the push-rod assembly（1）And fore-stock component（2）Collapse in after-poppet component（3）Both sides, the bottom
Folding support rod component（6）Middle part is folded up collapsing in fore-stock component（2）With after-poppet component（3）Between, double-action plate（7）Band
Dynamic lower supporting rod component（9）Top forward is collapsed in after-poppet component（3）, upper strut component（8）Top is with push-rod assembly（1）To
Lower upset is collapsed in push-rod assembly（1）With pusher bar assembly（3）Between.
A kind of 2. foldable baby stroller according to claim 1, it is characterised in that：The push-rod assembly（1）Including under
Portion and fore-stock component（2）With after-poppet component（3）The push rod of pin joint（1-1）And it is arranged on push rod（1-1）It is upper and can be along
The sliding part that push rod slides（1-2）, the upper strut component（8）Top and sliding part（1-2）Rotation connection, the sliding part
（1-2）With the first latched position and the second latched position, the push rod（1-1）Being provided with can be respectively in first, second locking
Position is to the sliding part（1-2）Enter line-locked second locking mechanism, the push-rod assembly（1）With the first operating position and
Second operating position；
Work as push-rod assembly（1）During in the first operating position, push-rod assembly（1）Positioned at after-poppet component（3）Top, the cunning
Moving part（1-2）Locked in the first latched position and by second locking mechanism, now direction of the direction of occupant with pushing away passerby
Unanimously；
Work as push-rod assembly（1）During in the second operating position, push-rod assembly（1）Positioned at fore-stock component（2）Top, the cunning
Moving part（1-2）Locked in the second latched position and by second locking mechanism, now direction of the direction of occupant with pushing away passerby
Relatively.
A kind of 3. foldable baby stroller according to claim 1, it is characterised in that：The push-rod assembly（1）Also include
Handle（1-3）, the handle（1-3）It is rotationally connected with push rod（1-1）Upper end, and the 3rd locking mechanism is provided between the two.
A kind of 4. foldable baby stroller according to claim 1, it is characterised in that：The bottom folding support rod component（6）
Including preceding moving part（6-1）With rear moving part（6-2）, the preceding moving part（6-1）Rear portion and rear moving part（6-2）Front portion
Rotation connection, the preceding moving part（6-1）Front portion with fore-stock component（2）Rotation connection, the rear moving part（6-2）
Rear portion and after-poppet component（3）Rotation connection.
A kind of 5. foldable baby stroller according to claim 4, it is characterised in that：The lower supporting rod component（9）Lower end
Extension extend back, the double-action plate（7）Upper end and the extension be rotatablely connected, the double-action plate（7）Under
End and the rear moving part（6-2）Rotation connection, and double-action plate（7）With rear moving part（6-2）Rotation connection position be located at after
Moving part（6-2）With the front side of the rotation connection position of after-poppet component.
A kind of 6. foldable baby stroller according to claim 4, it is characterised in that：The first locking mechanism is arranged on
Preceding moving part（6-1）With rear moving part（6-2）Rotation connection at.
A kind of 7. foldable baby stroller according to claim 4, it is characterised in that：The preceding moving part（6-1）Before
Portion is provided with foot pedal（10）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711365491.XA CN107878544B (en) | 2017-12-18 | 2017-12-18 | Folding baby stroller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711365491.XA CN107878544B (en) | 2017-12-18 | 2017-12-18 | Folding baby stroller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107878544A true CN107878544A (en) | 2018-04-06 |
| CN107878544B CN107878544B (en) | 2024-01-05 |
Family
ID=61771853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711365491.XA Active CN107878544B (en) | 2017-12-18 | 2017-12-18 | Folding baby stroller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107878544B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109760731A (en) * | 2018-12-11 | 2019-05-17 | 好孩子儿童用品有限公司 | A kind of children trolley |
| CN113730116A (en) * | 2021-09-24 | 2021-12-03 | 浙江爱司米电气有限公司 | Foldable wheelchair |
| CN113730116B (en) * | 2021-09-24 | 2024-04-19 | 浙江爱司米电气有限公司 | Foldable wheelchair |
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| CN2380463Y (en) * | 1999-06-15 | 2000-05-31 | 好孩子集团公司 | Direction-variable bassinet |
| CN2447253Y (en) * | 2000-08-10 | 2001-09-12 | 好孩子集团公司 | Children carriage capable of self-standing after folding |
| TWM319208U (en) * | 2007-01-22 | 2007-09-21 | Link Treasure Ltd | Collapsible stroller frame |
| CN204846017U (en) * | 2015-08-25 | 2015-12-09 | 邹德刚 | Virgin shallow of foldable baby |
| CN106828580A (en) * | 2016-12-28 | 2017-06-13 | 好孩子儿童用品有限公司 | Children trolley |
| CN106945709A (en) * | 2017-05-07 | 2017-07-14 | 昆山曼禾儿童用品设计有限公司 | A kind of novel folding doll carriage push rod direction-changing mechanism |
-
2017
- 2017-12-18 CN CN201711365491.XA patent/CN107878544B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2380463Y (en) * | 1999-06-15 | 2000-05-31 | 好孩子集团公司 | Direction-variable bassinet |
| CN2447253Y (en) * | 2000-08-10 | 2001-09-12 | 好孩子集团公司 | Children carriage capable of self-standing after folding |
| TWM319208U (en) * | 2007-01-22 | 2007-09-21 | Link Treasure Ltd | Collapsible stroller frame |
| CN204846017U (en) * | 2015-08-25 | 2015-12-09 | 邹德刚 | Virgin shallow of foldable baby |
| CN106828580A (en) * | 2016-12-28 | 2017-06-13 | 好孩子儿童用品有限公司 | Children trolley |
| CN106945709A (en) * | 2017-05-07 | 2017-07-14 | 昆山曼禾儿童用品设计有限公司 | A kind of novel folding doll carriage push rod direction-changing mechanism |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109760731A (en) * | 2018-12-11 | 2019-05-17 | 好孩子儿童用品有限公司 | A kind of children trolley |
| CN113730116A (en) * | 2021-09-24 | 2021-12-03 | 浙江爱司米电气有限公司 | Foldable wheelchair |
| CN113730116B (en) * | 2021-09-24 | 2024-04-19 | 浙江爱司米电气有限公司 | Foldable wheelchair |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107878544B (en) | 2024-01-05 |
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