CN217066823U - Wheelchair capable of being pushed in two directions - Google Patents
Wheelchair capable of being pushed in two directions Download PDFInfo
- Publication number
- CN217066823U CN217066823U CN202220779811.6U CN202220779811U CN217066823U CN 217066823 U CN217066823 U CN 217066823U CN 202220779811 U CN202220779811 U CN 202220779811U CN 217066823 U CN217066823 U CN 217066823U
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- Prior art keywords
- wheelchair
- pole
- rod
- wall
- support
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- Expired - Fee Related
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- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims description 2
- 239000003351 stiffener Substances 0.000 claims 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000474 nursing effect Effects 0.000 description 2
- 230000007958 sleep Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Abstract
The utility model relates to a wheelchair technical field specifically is a wheelchair that can two-wayly promote, be the L shape support that the symmetry set up including two, the rear end of two L shape supports all is equipped with fixed pole setting, and the equal swing joint in top of two fixed pole settings has first propelling movement frame, and the well lower part of two L shape support vertical pole outer walls is equipped with the foot support of symmetric distribution, and the foot support and the L shape support of left side are connected with the second jointly and are pushed the frame, and the foot support and the L shape support of right side also are connected with the second jointly and push the frame. This but wheelchair of two-way promotion can make the attendant promote the patient and remove forward at the rear of this wheelchair through first promotion frame, promotes the frame through the second and can make the attendant promote the patient in the place ahead of this wheelchair and remove dorsad to avoid patient's face to be directly blown to by cold wind, reduce patient's uncomfortable and feel, the attendant can directly carry out the interchange of eye spirit and state with the patient in addition, also can in time discover that the patient is sleeping.
Description
Technical Field
The utility model relates to the technical field of wheelchairs, in particular to a wheelchair capable of being pushed in two directions.
Background
The wheelchair is a chair provided with wheels and capable of helping to replace walking, and is an important moving tool for home rehabilitation, turnover transportation, diagnosis and outing activities of wounded persons, patients and disabled persons, the wheelchair not only meets the needs of physically disabled persons and persons with mobility disabilities, but also is more important to facilitate the movement of families and care of patients, so that the patients can do physical exercises and participate in social activities by means of the wheelchair, the handles of the existing wheelchair are arranged at the top end of the rear side support, therefore, nursing personnel can only push the wheelchair to move from the rear of the wheelchair, the direction can not be adjusted in winter, cold air can be directly blown to the face of the patient, the patient can feel uncomfortable, when the patient sleeps on the wheelchair, the person pushing the wheelchair can not pay attention in time, better humanitarian attention can not be realized, and the nursing personnel can not conveniently communicate with the eyes and states of the patient when pushing the wheelchair to move, in view of this, we propose a wheelchair that can be pushed in both directions.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a but wheelchair of two-way promotion, the handle that proposes current wheelchair in solving above-mentioned background art all sets up the top at the back side support, therefore, caregiver can only follow the rear promotion wheelchair of wheelchair and remove, can not adjust the direction when wind is big winter, cold wind can blow directly at patient's face, can make the patient uncomfortable, and the patient is sleeping on the wheelchair, the people who pushes away the wheelchair can not in time pay attention to yet, can not better human care, caregiver is when promoting the wheelchair and remove, also be convenient for carry out the problem that eye spirit and state exchanged with the patient.
In order to achieve the above object, the utility model provides a following technical scheme:
a bidirectional pushing wheelchair comprises two L-shaped supports which are symmetrically arranged, fixed vertical rods are arranged at the rear ends of the two L-shaped supports, main idler wheels which are symmetrically distributed are rotatably connected to the middle lower parts of the outer walls of the two fixed vertical rods, first pushing frames are movably connected to the top ends of the two fixed vertical rods, first reinforcing rods are horizontally arranged backwards in the middle of the outer walls of the vertical rods of the two L-shaped supports, a seat plate is arranged between the two first reinforcing rods, a backup plate is arranged between the two fixed vertical rods, the bottom of backup plate and the rear side edge at bedplate top laminate mutually, two the bottom of L shape support all is equipped with the universal wheel, two the well lower part of L shape support vertical pole outer wall is equipped with the foot support of symmetric distribution, the left side foot support and L shape support are connected with the second and promote the frame jointly, and the right side foot support and L shape support also are connected with the second and promote the frame jointly.
Preferably, a first rectangular connecting groove is formed in the top end of the fixed vertical rod, the first pushing frame comprises a first rectangular adjusting rod, and the first rectangular adjusting rod is connected in the first rectangular connecting groove in a sliding mode.
Preferably, the outer wall of the fixed vertical rod and the position close to the top end are in threaded connection with a first fastening bolt, the end of the first fastening bolt penetrates through the outer wall of the fixed vertical rod and abuts against the rear side of the first rectangular adjusting rod, and a first handle is arranged at the top end of the first rectangular adjusting rod.
Preferably, a first connecting rod is arranged between the two L-shaped supports and at the middle lower part of the vertical rod, a second connecting rod is arranged between the two fixed vertical rods and at the position close to the bottom, second reinforcing rods are horizontally arranged backwards at the outer walls of the two L-shaped supports and at the position close to the bottom, and the rear ends of the two second reinforcing rods are fixedly connected with the outer walls of the two fixed vertical rods respectively.
Preferably, the outer wall of the L-shaped support vertical rod and the position close to the bent position are provided with mounting holes a.
Preferably, the bottom end of the foot support is provided with a pedal, the outer wall of the foot support is provided with a mounting hole b at a position close to the joint with the L-shaped support, and the inner diameter of the mounting hole b is the same as that of the mounting hole a.
Preferably, the second promotes the frame and includes the cylindricality pole, the cylindricality pole is the slope setting, just contained angle between cylindricality pole and the L shape support vertical pole is 35-45, the bottom of cylindricality pole is equipped with first U-shaped connecting plate, first U-shaped connecting plate passes through the mounting and can dismantle the top department of connecting in the foot support, the circular port has been seted up at the middle part of the first U-shaped connecting plate left and right sides, the second rectangle spread groove has been seted up on the top of cylindricality pole, sliding connection has the second rectangle to adjust the pole in the second rectangle spread groove, the top of second rectangle to adjust the pole is equipped with the second handle.
Preferably, the horizontal back of middle part level of cylindricality pole outer wall is equipped with horizontal dead lever, the rear end of horizontal dead lever is equipped with the second U-shaped connecting plate, the second U-shaped connecting plate passes through the mounting and can dismantle the top of connecting in the vertical pole outer wall of L shape support, the circular port has also been seted up in the middle part of the second U-shaped connecting plate left and right sides.
Preferably, the outer wall of the cylindrical rod and the position close to the top end are in threaded connection with a second fastening bolt, and the end of the second fastening bolt penetrates through the outer wall of the cylindrical rod and abuts against the side face of the second rectangular adjusting rod.
Preferably, the mounting includes the threaded rod, the external diameter of threaded rod and the internal diameter looks adaptation of mounting hole b, the one end of threaded rod is equipped with circular locating piece, the other end threaded connection of threaded rod has fastening nut.
Compared with the prior art, the beneficial effects of the utility model are that:
according to the bidirectional pushing wheelchair, the accompanying person can push a patient to move forwards at the rear of the wheelchair through the arranged first pushing frame, and the height of the first handle can be adjusted by the accompanying person according to the height of the accompanying person through the fixed upright rod, the first fastening bolt and the first rectangular adjusting rod, so that the accompanying person can push the patient to move in a comfortable arm state, and the soreness of the arms of the accompanying person is reduced; the second pushing frame can enable an attendant to push a patient to move back and forth in front of the wheelchair so as to avoid the face of the patient from being directly blown by cold air, discomfort of the patient is reduced, the attendant can directly communicate with the eye and state of the patient and can also find the patient to sleep in time, and the height of the second handle can be adjusted through the cylindrical rod, the second rectangular adjusting rod and the second fastening bolt so as to adapt to attendants with different heights and facilitate the attendant to push the wheelchair to move; the second promotes the frame and can dismantle to make the attendant can carry out the selectivity installation according to the weather condition.
Drawings
Fig. 1 is a schematic view of an overall first viewing angle structure of the present invention;
fig. 2 is a schematic view of an overall second viewing angle structure of the present invention;
FIG. 3 is a schematic view of a part of the structure of the present invention;
fig. 4 is a schematic view of an assembly structure of the fixed vertical rod and the first pushing frame of the present invention;
fig. 5 is a schematic view of an assembly structure of the second pushing frame and the fixing member according to the present invention.
In the figure: the adjustable seat cushion comprises an L-shaped support 1, a mounting hole a10, a fixed upright rod 2, a first rectangular connecting groove 20, a first fastening bolt 21, a seat plate 3, a backup plate 4, a universal wheel 5, a foot support 6, a mounting hole b60, a pedal 61, a first pushing frame 7, a first rectangular adjusting rod 70, a first handle 71, a second pushing frame 8, a cylindrical rod 80, a second rectangular connecting groove 800, a second rectangular adjusting rod 81, a second handle 82, a transverse fixing rod 83, a second fastening bolt 84, a first U-shaped connecting plate 85, a second U-shaped connecting plate 86, a fixing piece 9, a threaded rod 90, a circular positioning block 91, a fastening nut 92, a first reinforcing rod 11, a second reinforcing rod 12, a first connecting rod 13, a second connecting rod 14 and a main roller 15.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
Referring to fig. 1-5, the present invention provides a technical solution:
a bidirectional pushing wheelchair comprises two L-shaped supports 1 which are symmetrically arranged, wherein the rear ends of the two L-shaped supports 1 are respectively provided with a fixed upright rod 2, the middle lower parts of the outer walls of the two fixed upright rods 2 are rotatably connected with main idler wheels 15 which are symmetrically distributed and are main wheels of the wheelchair and can be used for automatically pushing a patient, the top ends of the two fixed upright rods 2 are respectively and movably connected with a first pushing frame 7, an attendant can push the patient to move forwards at the rear part of the wheelchair through the first pushing frame 7, the middle parts of the vertical rod outer walls of the two L-shaped supports 1 are respectively and horizontally provided with a first reinforcing rod 11 backwards, a seat plate 3 is arranged between the two first reinforcing rods 11, a backup plate 4 is arranged between the two fixed upright rods 2, the bottom of the backup plate 4 is attached to the rear side edge of the top part of the seat plate 3 and is used for the patient to sit on, the bottom ends of the two L-shaped supports 1 are respectively provided with universal wheels 5, the middle lower parts of the vertical rod outer walls of the two L-shaped supports 1 are respectively provided with symmetrically distributed foot supports 6, the foot support 6 and the L shape support 1 of left side are connected with the second jointly and promote frame 8, the foot support 6 and the L shape support 1 of right side also are connected with the second jointly and promote frame 8, the second that sets up promotes frame 8 and can make the attendant promote the patient dorsad and remove in the place ahead of this wheelchair, in order to avoid patient's face to be directly blown to by cold wind, reduce patient's uncomfortable and feel, and the attendant can directly carry out the interchange of eye spirit and state with the patient, also can in time discover that the patient is sleeping.
In this embodiment, the top end of the fixed vertical rod 2 is provided with a first rectangular connecting groove 20, the first pushing frame 7 includes a first rectangular adjusting rod 70, the first rectangular adjusting rod 70 is slidably connected in the first rectangular connecting groove 20, and the height of the first handle 71 is adjusted by adjusting the position of the first rectangular adjusting rod 70, so that the height of the first handle 71 is adjusted by an attendant according to the height of the attendant, the attendant pushes a patient to move in a comfortable arm state, and the soreness of the arm of the attendant is reduced.
Specifically, the outer wall of the fixed vertical rod 2 and the position close to the top end are in threaded connection with a first fastening bolt 21, the end portion of the first fastening bolt 21 penetrates through the outer wall of the fixed vertical rod 2 and abuts against the rear side of the first rectangular adjusting rod 70, the first rectangular adjusting rod 70 after the position is adjusted is fixed through the first fastening bolt 21, and a first handle 71 is arranged at the top end of the first rectangular adjusting rod 70 and used for a hand of an attendant to hold.
Furthermore, a first connecting rod 13 is arranged between the two L-shaped supports 1 and at the middle lower part of the vertical rod, a second connecting rod 14 is arranged between the two fixed vertical rods 2 and at the position close to the bottom, second reinforcing rods 12 are horizontally arranged backwards at the outer walls of the two L-shaped supports 1 and at the position close to the bottom, and the rear ends of the two second reinforcing rods 12 are fixedly connected with the outer walls of the two fixed vertical rods 2 respectively, so that the overall strength of the wheelchair is improved.
Furthermore, a mounting hole a10 is formed in the outer wall of the vertical rod of the L-shaped bracket 1 and at a position close to the bent position, and is used for the threaded rod 90 to pass through.
Furthermore, the bottom end of the foot support 6 is provided with a pedal 61 for the foot of the patient to rest, the outer wall of the foot support 6 and the position close to the joint with the L-shaped support 1 are provided with a mounting hole b60, the inner diameter of the mounting hole b60 is the same as that of the mounting hole a10, and the mounting hole b60 is also used for the threaded rod 90 to pass through.
Further, the second pushing frame 8 comprises a cylindrical rod 80, the cylindrical rod 80 is arranged in an inclined manner, an included angle between the cylindrical rod 80 and the vertical rod of the L-shaped support 1 is 35-45 degrees, the top end of the cylindrical rod 80 is positioned in front of the pedal 61, the collision between the feet of an attendant and the feet of a patient when the wheelchair is pushed is avoided, the bottom end of the cylindrical rod 80 is provided with a first U-shaped connecting plate 85, the first U-shaped connecting plate 85 is detachably connected to the top end of the foot support 6 through a fixing part 9, the middle parts of the left side and the right side of the first U-shaped connecting plate 85 are provided with circular holes for the threaded rod 90 to pass through, the top end of the cylindrical rod 80 is provided with a second rectangular connecting groove 800, the second rectangular connecting groove 800 is connected with a second rectangular adjusting rod 81 in a sliding manner, the height of the second handle 82 is adjusted through the second rectangular adjusting rod 81, the top end of the second rectangular adjusting rod 81 is provided with a second handle 82, for the hand of the accompanying person to hold.
Further, the middle part level of cylindricality pole 80 outer wall is equipped with horizontal dead lever 83 backward, the rear end of horizontal dead lever 83 is equipped with second U-shaped connecting plate 86, second U-shaped connecting plate 86 can dismantle through mounting 9 and connect in the top of the vertical pole outer wall of L shape support 1, the circular port has also been seted up at the middle part of the second U-shaped connecting plate 86 left and right sides, supply threaded rod 90 to pass the use, second propelling movement frame 8 can be dismantled with foot's support 6 and L shape support 1 respectively through first U-shaped connecting plate 85 and second U-shaped connecting plate 86 and be connected, thereby make the attendant can carry out the selectivity installation according to the weather condition.
Furthermore, a second fastening bolt 84 is connected to the outer wall of the cylindrical rod 80 and a position close to the top end through threads, the end of the second fastening bolt 84 penetrates through the outer wall of the cylindrical rod 80 and abuts against the side face of the second rectangular adjusting rod 81, and the second rectangular adjusting rod 81 after the position is adjusted is fixed through the second fastening bolt 84.
Further, the fixing member 9 includes a threaded rod 90, the outer diameter of the threaded rod 90 is matched with the inner diameter of the mounting hole b60, a circular positioning block 91 is arranged at one end of the threaded rod 90, the side surface of the circular positioning block 91 abuts against one side of the first U-shaped connecting plate 85 or the second U-shaped connecting plate 86, a fastening nut 92 is in threaded connection with the other end of the threaded rod 90, the side surface of the fastening nut 92 abuts against the other side of the first U-shaped connecting plate 85 or the second U-shaped connecting plate 86, so that the first U-shaped connecting plate 85 is fixed on the foot support 6, and the second U-shaped connecting plate 86 is fixed on the L-shaped support 1.
When the bidirectional-pushing wheelchair is used, when an attendant pushes the wheelchair to move by using the first pushing frame 7, the attendant firstly adjusts the height of the first handle 71 according to the height of the attendant, specifically, the first fastening bolt 21 is loosened, then the first rectangular adjusting rod 70 is moved upwards or downwards until the height of the first handle 71 is suitable for the attendant to use, and then the first fastening bolt 21 is tightened to fix the height of the first rectangular adjusting rod 70; when the accompanying person uses the second pushing frame 8 to push the wheelchair to move, the accompanying person firstly adjusts the height of the second handle 82 according to the height of the accompanying person, specifically, the second fastening bolt 84 is loosened, then the second rectangular adjusting rod 81 is moved upwards or downwards until the height of the second handle 82 is suitable for the accompanying person to use, and then the second fastening bolt 84 is tightened to fix the height of the second rectangular adjusting rod 81; when the attendant does not need to use the second pushing frame 8, the attendant completely detaches the four fixing pieces 9 and then takes out the two second pushing frames 8.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A bidirectional push wheelchair is characterized in that: the device comprises two L-shaped supports (1) which are symmetrically arranged, wherein the rear ends of the two L-shaped supports (1) are respectively provided with a fixed vertical rod (2), the middle lower parts of the outer walls of the two fixed vertical rods (2) are rotatably connected with symmetrically distributed main rollers (15), the top ends of the two fixed vertical rods (2) are respectively and movably connected with a first pushing frame (7), the middle parts of the outer walls of the vertical rods of the two L-shaped supports (1) are respectively and horizontally provided with a first reinforcing rod (11), a seat plate (3) is arranged between the two first reinforcing rods (11), a backup plate (4) is arranged between the two fixed vertical rods (2), the bottom of the backup plate (4) is attached to the rear side edge of the top of the seat plate (3), the bottom ends of the two L-shaped supports (1) are respectively provided with a universal wheel (5), and the middle lower parts of the outer walls of the vertical rods of the two L-shaped supports (1) are respectively provided with symmetrically distributed foot supports (6), the foot support (6) and the L-shaped support (1) on the left side are connected with a second pushing frame (8) together, and the foot support (6) and the L-shaped support (1) on the right side are also connected with the second pushing frame (8) together.
2. The bi-directionally pushable wheelchair of claim 1, wherein: first rectangle spread groove (20) have been seted up on the top of fixed pole setting (2), first push frame (7) are including first rectangle regulation pole (70), first rectangle regulation pole (70) sliding connection is in first rectangle spread groove (20).
3. The bi-directionally pushable wheelchair of claim 2, wherein: the outer wall of fixed pole setting (2) and the position threaded connection that is close to the top have first fastening bolt (21), the tip of first fastening bolt (21) passes the outer wall of fixed pole setting (2) and offsets with the rear side of first rectangle regulation pole (70), the top of first rectangle regulation pole (70) is equipped with first in command (71).
4. The bi-directionally pushable wheelchair of claim 1, wherein: two between L shape support (1) and be located the position of vertical pole middle and lower part and be equipped with head rod (13), two between fixed pole setting (2) and the position that is close to the bottom is equipped with second connecting rod (14), two the outer wall of L shape support (1) vertical pole just is close to the position of bottom and all is equipped with second stiffener (12) to the back level, two the rear end of second stiffener (12) respectively with two the outer wall fixed connection of fixed pole setting (2).
5. The bi-directionally pushable wheelchair of claim 1, wherein: and a mounting hole a (10) is formed in the outer wall of the vertical rod of the L-shaped support (1) and is close to the bent part.
6. The bi-directionally pushable wheelchair of claim 5, wherein: the bottom of foot support (6) is equipped with pedal (61), mounting hole b (60) have been seted up to the outer wall of foot support (6) and the position that is close to with L shape support (1) junction, the internal diameter of mounting hole b (60) is the same with the internal diameter of mounting hole a (10).
7. The bi-directionally pushable wheelchair of claim 6, wherein: second promotes frame (8) including cylindricality pole (80), cylindricality pole (80) are the slope setting, just contained angle between cylindricality pole (80) and the vertical pole of L shape support (1) is 35-45, the bottom of cylindricality pole (80) is equipped with first U-shaped connecting plate (85), first U-shaped connecting plate (85) can be dismantled through mounting (9) and connect in the top department of foot support (6), the circular port has been seted up at the middle part of first U-shaped connecting plate (85) left and right sides, second rectangle spread groove (800) have been seted up on the top of cylindricality pole (80), sliding connection has second rectangle to adjust pole (81) in second rectangle spread groove (800), the top of second rectangle to adjust pole (81) is equipped with second handle (82).
8. The bi-directionally pushable wheelchair of claim 7, wherein: the middle part level of cylindricality pole (80) outer wall is equipped with horizontal dead lever (83) backward, the rear end of horizontal dead lever (83) is equipped with second U-shaped connecting plate (86), second U-shaped connecting plate (86) are through mounting (9) can dismantle the top of connecting in the vertical pole outer wall of L shape support (1), the circular port has also been seted up in the middle part of second U-shaped connecting plate (86) left and right sides.
9. The bi-directionally pushable wheelchair of claim 7, wherein: the outer wall of the cylindrical rod (80) is in threaded connection with a second fastening bolt (84) at a position close to the top end, and the end part of the second fastening bolt (84) penetrates through the outer wall of the cylindrical rod (80) and abuts against the side face of the second rectangular adjusting rod (81).
10. The bi-directionally pushable wheelchair of claim 7, wherein: mounting (9) include threaded rod (90), the external diameter of threaded rod (90) and the internal diameter looks adaptation of mounting hole b (60), the one end of threaded rod (90) is equipped with circular locating piece (91), the other end threaded connection of threaded rod (90) has fastening nut (92).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220779811.6U CN217066823U (en) | 2022-04-06 | 2022-04-06 | Wheelchair capable of being pushed in two directions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220779811.6U CN217066823U (en) | 2022-04-06 | 2022-04-06 | Wheelchair capable of being pushed in two directions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217066823U true CN217066823U (en) | 2022-07-29 |
Family
ID=82555288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220779811.6U Expired - Fee Related CN217066823U (en) | 2022-04-06 | 2022-04-06 | Wheelchair capable of being pushed in two directions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217066823U (en) |
-
2022
- 2022-04-06 CN CN202220779811.6U patent/CN217066823U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220729 |