CN113730122B - Locking mechanism of foldable wheelchair - Google Patents
Locking mechanism of foldable wheelchair Download PDFInfo
- Publication number
- CN113730122B CN113730122B CN202111133824.2A CN202111133824A CN113730122B CN 113730122 B CN113730122 B CN 113730122B CN 202111133824 A CN202111133824 A CN 202111133824A CN 113730122 B CN113730122 B CN 113730122B
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- China
- Prior art keywords
- locking
- rod
- connecting rod
- plate
- torsion spring
- 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 title claims abstract description 35
- 238000000034 method Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
- A61G5/0883—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable having locking means for maintaining a folded or unfolded condition
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/10—Parts, details or accessories
- A61G5/1051—Arrangements for steering
Abstract
The invention provides a locking mechanism of a foldable wheelchair, which comprises a locking rod connected to a rear wheel bracket of the foldable wheelchair, a connecting plate used for connecting a front wheel of the foldable wheelchair and a backrest bracket, a connecting rod vertically connected to the connecting plate and parallel to the locking rod, and a locking plate rotatably sleeved on the connecting rod, wherein the connecting plate is rotatably connected to the outer side of the rear wheel bracket through a rotating shaft, the rotating axis of the locking plate is coincident with the axis of the connecting rod, the rotating shaft is positioned below the locking rod and the connecting rod, the distance between the rotating shaft and the locking rod is equal, a groove matched with the locking rod is formed in the locking plate, the groove is buckled with or separated from the locking rod through the rotation of the locking plate, locking and unlocking of the locking mechanism are realized, the groove and the locking rod are exposed, a fault point can be rapidly judged, the overhaul and replacement operation is convenient, the contact area of the groove and the locking rod is large, the locking force is large, the impact resistance is not easy to damage, and the durability is good.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to a locking mechanism of a foldable wheelchair.
Background
In the treatment and rehabilitation process of patients, particularly for patients incapable of independently walking, a wheelchair-sitting mode is generally adopted to replace walking, so that the patients can be better treated and rehabilitated, and the daily life of the patients is facilitated.
For easy storage, foldable wheelchairs are commercially available, and basically, these wheelchairs are provided with a locking mechanism for locking the foldable wheelchair frame, and the existing locking mechanism mostly realizes the locking of the axial rotation of the shaft or the shaft sleeve by arranging a locking piece between the shaft and the shaft sleeve, for example, the locking mechanism is disclosed in chinese patent CN212235014U, but at least has the following defects:
1. the size of each part is small and is positioned in the shaft sleeve, so that the fault point is difficult to judge quickly, and the maintenance and replacement operations are inconvenient.
2. The area of the matched area of each part is small, the locking force is small, the impact resistance is not high, the parts are easy to damage, and the durability is poor.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the locking mechanism of the foldable wheelchair, which can rapidly judge fault points, is convenient to overhaul and replace, has high locking force, is impact-resistant, is not easy to damage and has good durability.
In order to achieve the above object, the present invention provides a locking mechanism of a foldable wheelchair, comprising:
the locking rod is connected to the rear wheel bracket of the foldable wheelchair;
the connecting plate is used for connecting a front wheel bracket and a backrest bracket of the foldable wheelchair and is rotatably connected to the outer side of the rear wheel bracket through a rotating shaft;
the connecting rod is vertically connected to the connecting plate and extends along the direction parallel to the locking rod;
the locking plate is rotatably sleeved on the connecting rod, and the axis of rotation of the locking plate coincides with the axis of the connecting rod;
the rotating shaft is positioned below the locking rod and the connecting rod, and the rotating shaft is equal to the distance between the locking rod and the connecting rod; the locking plate is provided with a groove matched with the locking rod; when the locking mechanism is in a locking state, the locking plate is turned downwards to enable the groove to be buckled on the locking rod, the relative position of the connecting rod and the locking rod is kept fixed, and the relative position of the connecting plate and the rear wheel bracket is kept fixed; when the locking mechanism is in an unlocking state, the locking plate is turned upwards to enable the groove to be separated from the locking rod, and the connecting plate can drive the connecting rod to rotate relative to the locking rod when rotating.
Preferably, a torsion spring is sleeved on the connecting rod, two ends of the torsion spring are respectively connected with the connecting rod and the locking plate, and the torsion spring has a trend of driving the locking plate to rotate downwards so as to enable the locking mechanism to be changed into a locking state.
Further preferably, short tubes are connected to both ends of the locking plate, and a cavity for accommodating the torsion spring is provided between an inner wall of the short tube and an outer wall of the connecting rod.
Further preferably, the locking mechanism further comprises a torsion spring cover for closing the cavity, and the torsion spring cover is slidably sleeved on the connecting rod.
Further preferably, the torsion spring cover is provided with a locking bolt for locking the relative positions of the torsion spring cover and the connecting rod, and the locking bolt penetrates through the torsion spring cover and the connecting rod along the radial direction of the connecting rod.
Further preferably, a protruding portion is provided on a side of the torsion spring cover, which is close to the locking rod, and a positioning groove matched with the locking rod is provided on a side wall of the protruding portion, which faces the connecting rod, and when the connecting plate rotates forward to a limit position relative to the rear wheel bracket, an inner wall of the positioning groove is engaged with and abuts against an outer wall of the locking rod.
Further preferably, the side wall of the protruding portion, which is close to the locking plate, is provided with a first protrusion extending toward the locking plate, the outer wall of the short tube is provided with a second protrusion extending along the radial direction of the connecting rod, and when the locking plate rotates downward to a limit position relative to the connecting rod, the second protrusion abuts against the first protrusion.
Further preferably, an inclined plane is provided on an end surface of the locking plate near the locking rod, and when the connecting plate rotates forward, the inclined plane makes the locking plate rotate upward by abutting against an outer wall of the locking rod, so that an inner wall of the positioning groove can abut against an outer wall of the locking rod.
Further preferably, the positioning groove is an arc groove, and the radian of the positioning groove is less than or equal to 180 degrees.
Further preferably, when the locking mechanism is in the locked state, the axis of the connecting rod is located above the axis of the locking rod.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the invention provides a locking mechanism of a foldable wheelchair, comprising: the connecting plate is connected to the locking rod on the foldable wheelchair rear wheel support, the connecting plate for connecting the foldable wheelchair front wheel and the backrest support, the connecting rod vertically connected to the connecting plate and extending along the direction parallel to the locking rod, the locking plate rotatably sleeved on the connecting rod, the connecting plate is rotatably connected to the outer side of the rear wheel support through the rotating shaft, the rotating axis of the locking plate is coincident with the axis of the connecting rod, the rotating shaft is located below the locking rod and the connecting rod, the distance between the rotating shaft and the locking rod is equal, grooves matched with the locking rod are formed in the locking plate, the technical effect that the grooves are buckled on the locking rod through downward overturning of the locking plate to lock the relative positions of the connecting rod and the locking rod, and then the relative positions of the locking connecting plate and the rear wheel support are locked is achieved, the technical effect that the grooves are separated from the locking rod through upward overturning of the locking plate to enable the connecting rod to be driven to rotate relative to the locking rod is achieved, the grooves and the locking rod are exposed, the fault points can be rapidly judged, the overhaul and replacement operation is convenient, the contact area of the grooves and the locking rod in the axial direction is large, the locking force is resistant to impact, and the damage is resistant, and the durability is good.
Drawings
Fig. 1 is an exploded perspective view of a preferred embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of the locking plate of fig. 1 with the locking mechanism in a locked state.
Fig. 3 is a schematic cross-sectional view of the locking plate of fig. 1 with the locking mechanism in an unlocked state.
Wherein: 10. a locking lever; 11. a rear wheel bracket; 20. a connecting plate; 21. a rotating shaft; 30. a connecting rod; 31. a torsion spring; 40. a locking plate; 41. a groove; 42. a short pipe; 421. a second protrusion; 43. an inclined plane; 50. a torsion spring cover; 51. a locking bolt; 52. a protruding portion; 521. a positioning groove; 522. a first protrusion.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the attached drawings so that the advantages and features of the present invention will be more readily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
The present invention describes that the front-back, left-right, up-down directions are the front-back, left-right, up-down directions in fig. 1.
As shown in fig. 1 to 3, the locking mechanism of the foldable wheelchair provided by the invention comprises: the foldable wheelchair comprises a locking rod 10, a connecting plate 20, a connecting rod 30, a locking plate 40 and a torsion spring cover 50, wherein the locking rod 10 is connected to a rear wheel bracket 11 of the foldable wheelchair, and the locking rod 10 extends in the left-right direction; the connecting plate 20 is used for connecting a front wheel bracket and a backrest bracket of the foldable wheelchair, and the connecting plate 20 is rotatably connected to the outer side of the rear wheel bracket 11 through a rotating shaft 21; the connecting rod 30 is vertically connected to the connecting plate 20, and the connecting rod 30 extends in a direction parallel to the locking rod 10; the locking plate 40 is rotatably sleeved on the connecting rod 30, and the axis of rotation of the locking plate 40 coincides with the axis of the connecting rod 30; the rotating shaft 21 is positioned below the locking rod 10 and the connecting rod 30, and the distance between the rotating shaft 21 and the locking rod 10 and the connecting rod 30 is equal; the locking plate 40 is provided with a groove 41 matched with the locking rod 10; when the locking mechanism is in a locking state, the connecting plate 20 rotates forwards to enable the axial lead of the connecting rod 30 to be located above the axial lead of the locking rod 10, the locking plate 40 turns downwards to enable the groove 41 to be buckled on the locking rod 10, the relative position of the connecting rod 30 and the locking rod 10 is kept fixed, and the relative position of the connecting plate 40 and the rear wheel bracket 11 is kept fixed; when the locking mechanism is in an unlocked state, the locking plate 40 is turned upwards to enable the groove 41 to be separated from the locking rod 10, and the connecting plate 20 can drive the connecting rod 30 to rotate relative to the locking rod 10 when rotating.
The advantage that sets up like this lies in, can enough conveniently realize locking mechanism's locking and unblock, can make recess and locking lever expose again, can judge the fault point fast when unusual, overhauls and change convenient operation, and recess and locking lever's area of contact is big, the locking force is big, shock-resistant, not fragile, the durability is good.
In this embodiment, a torsion spring 31 is sleeved on the connecting rod 30, two ends of the torsion spring 31 are respectively connected with the connecting rod 30 and the locking plate 40, the torsion spring 31 has a tendency of driving the locking plate 40 to rotate downwards to change the locking mechanism to a locking state, short tubes 42 are connected to two ends of the locking plate 40, and a cavity for accommodating the torsion spring 31 is arranged between the inner wall of the short tube 42 and the outer wall of the connecting rod 30.
The advantage of setting like this is that can be through torsional spring drive locking plate rotation, possesses the function of automatic locking.
Further, the end surface of the locking plate 40 near the locking lever 30 is provided with a slope 43, and when the connecting plate 20 rotates forward, the slope 43 makes the locking plate 40 rotate upward by abutting against the outer wall of the locking lever 10, so that the inner wall of the positioning groove 521 can abut against the outer wall of the locking lever 10.
The advantage of setting up like this is that can realize the automatic locking function of locking board through the effect of the normal running fit torsional spring of connecting plate.
To avoid spring out of the torsion spring, in this embodiment, the locking mechanism further includes a torsion spring cover 50 for closing the cavity, the torsion spring cover 50 is slidably sleeved on the connecting rod 30, a locking bolt 51 for locking the relative positions of the torsion spring cover 50 and the connecting rod 30 is provided on the torsion spring cover 50, and the locking bolt 51 penetrates through the torsion spring cover 50 and the connecting rod 30 along the radial direction of the connecting rod 30.
Further, a protruding portion 52 is provided on one side of the torsion spring cover 50 near the locking bar 10, a positioning groove 521 matching with the locking bar 10 is provided on a side wall of the protruding portion 52 facing the connecting bar 30, the positioning groove 521 is an arc groove, the arc is equal to 180 °, when the connecting bar 20 rotates forward to a limit position relative to the rear wheel bracket 11, an inner wall of the positioning groove 521 is engaged with and abuts against an outer wall of the locking bar 10, a first protrusion 522 extending toward the locking plate 40 is provided on a side wall of the protruding portion 52 near the locking plate 40, a second protrusion 421 extending along a radial direction of the connecting bar 30 is provided on an outer wall of the short tube 42, and when the locking plate 40 rotates downward to the limit position relative to the connecting bar 30, the second protrusion 421 abuts against the first protrusion 522.
The advantage of setting up like this is that limit position's when can realizing locking plate and connecting plate rotation through simple structure cooperation, further promotes security and stability when this locking mechanical system uses.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (6)
1. A locking mechanism for a collapsible wheelchair comprising:
the locking rod is connected to the rear wheel bracket of the foldable wheelchair;
the connecting plate is used for connecting a front wheel bracket and a backrest bracket of the foldable wheelchair and is rotatably connected to the outer side of the rear wheel bracket through a rotating shaft;
the connecting rod is vertically connected to the connecting plate and extends along the direction parallel to the locking rod;
the locking plate is rotatably sleeved on the connecting rod, and the axis of rotation of the locking plate coincides with the axis of the connecting rod;
the method is characterized in that:
the rotating shaft is positioned below the locking rod and the connecting rod, the distance between the rotating shaft and the locking rod is equal to the distance between the rotating shaft and the connecting rod, a groove matched with the locking rod is formed in the locking plate, when the locking mechanism is in a locking state, the locking plate is turned downwards to enable the groove to be buckled on the locking rod, the relative position of the connecting rod and the locking rod is kept fixed, and the relative position of the connecting plate and the rear wheel bracket is kept fixed; when the locking mechanism is in an unlocking state, the locking plate is turned upwards to enable the groove to be separated from the locking rod, and the connecting plate can drive the connecting rod to rotate relative to the locking rod when rotating;
the connecting rod is sleeved with a torsion spring, two ends of the torsion spring are respectively connected with the connecting rod and the locking plate, the torsion spring is provided with a trend of driving the locking plate to rotate downwards so that the locking mechanism is changed to a locking state, two ends of the locking plate are connected with short pipes, a cavity for accommodating the torsion spring is formed between the inner wall of each short pipe and the outer wall of the connecting rod, the locking mechanism further comprises a torsion spring cover for closing the cavity, the torsion spring cover is slidably sleeved on the connecting rod, a protruding part is arranged on one side, close to the locking rod, of the torsion spring cover, a positioning groove matched with the locking rod is formed in the side wall of the protruding part, and when the connecting plate rotates forwards to a limiting position relative to the rear wheel support, the inner wall of the positioning groove is adhered to and abutted to the outer wall of the locking rod.
2. The locking mechanism of a collapsible wheelchair of claim 1, wherein: the torsion spring cover is provided with a locking bolt for locking the relative positions of the torsion spring cover and the connecting rod, and the locking bolt penetrates through the torsion spring cover and the connecting rod along the radial direction of the connecting rod.
3. The locking mechanism of a collapsible wheelchair of claim 1, wherein: the lateral wall that the bulge is close to the locking plate is provided with the orientation the first arch of locking plate extension, be equipped with on the outer wall of nozzle stub follow the radial direction of connecting rod extends the second arch, when the locking plate for the connecting rod rotates down to extreme position, the second arch with first arch offsets tightly.
4. The locking mechanism of a collapsible wheelchair of claim 1, wherein: the end face, close to the locking rod, of the locking plate is provided with an inclined surface, and when the connecting plate rotates forwards, the inclined surface enables the locking plate to rotate upwards by abutting against the outer wall of the locking rod, so that the inner wall of the positioning groove can abut against the outer wall of the locking rod.
5. The locking mechanism of a collapsible wheelchair of claim 1, wherein: the positioning groove is an arc groove, and the radian of the positioning groove is smaller than or equal to 180 degrees.
6. The locking mechanism for a collapsible wheelchair of any one of claims 1-5, wherein: when the locking mechanism is in a locking state, the axial lead of the connecting rod is positioned above the axial lead of the locking rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111133824.2A CN113730122B (en) | 2021-09-27 | 2021-09-27 | Locking mechanism of foldable wheelchair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111133824.2A CN113730122B (en) | 2021-09-27 | 2021-09-27 | Locking mechanism of foldable wheelchair |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113730122A CN113730122A (en) | 2021-12-03 |
| CN113730122B true CN113730122B (en) | 2024-04-09 |
Family
ID=78741223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111133824.2A Active CN113730122B (en) | 2021-09-27 | 2021-09-27 | Locking mechanism of foldable wheelchair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113730122B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08257065A (en) * | 1995-03-24 | 1996-10-08 | Nissan Shatai Co Ltd | Wheelchair fixing device for vehicle |
| US6206462B1 (en) * | 2000-04-17 | 2001-03-27 | Ming-Tai Huang | Pinch preventing mechanism for a collapsible chair |
| US7273249B1 (en) * | 2006-10-20 | 2007-09-25 | Taiwan Shin Yeh Enterprise Co., Ltd. | Foldable chair |
| JP2008253426A (en) * | 2007-04-03 | 2008-10-23 | Iura Co Ltd | Separation type bathing carry |
| EP2210794A2 (en) * | 2009-01-23 | 2010-07-28 | Nuna International B.V. | Buggy provided with a braking mechanism |
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| CN207449991U (en) * | 2017-03-09 | 2018-06-05 | 庄育霖 | Foldable pushchair |
| CN207996268U (en) * | 2017-12-10 | 2018-10-23 | 祝龙球 | A kind of folding light shape electric wheelchair |
| CN109394440A (en) * | 2018-03-27 | 2019-03-01 | 美利驰医疗器械（苏州）有限公司 | Safety-type, the facilitation electric wheelchair of one kind and its working method |
| CN209220730U (en) * | 2018-04-09 | 2019-08-09 | 南京金百合医疗器械有限公司 | A kind of built-in contact cell Quick Release electric wheelchair |
| CN210078087U (en) * | 2019-04-16 | 2020-02-18 | 江苏福维健康科技有限公司 | Wheelchair backrest folding and unlocking mechanism |
| CN111067726A (en) * | 2020-01-03 | 2020-04-28 | 福佑康智能医疗科技(昆山)有限公司 | Multifunctional electric wheelchair |
| CN113730116A (en) * | 2021-09-24 | 2021-12-03 | 浙江爱司米电气有限公司 | Foldable wheelchair |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2539627A (en) * | 2015-04-22 | 2016-12-28 | I-Glider Ltd | A reconfigurable wheeled personal mobility device |
| ITUA20162334A1 (en) * | 2016-04-06 | 2017-10-06 | Klaxon Mobility Gmbh | CONNECTION GROUP FOR THE COMBINATION OF AN AUXILIARY TRACTION SYSTEM TO A DISABLED WHEELCHAIR |
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2021
- 2021-09-27 CN CN202111133824.2A patent/CN113730122B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08257065A (en) * | 1995-03-24 | 1996-10-08 | Nissan Shatai Co Ltd | Wheelchair fixing device for vehicle |
| US6206462B1 (en) * | 2000-04-17 | 2001-03-27 | Ming-Tai Huang | Pinch preventing mechanism for a collapsible chair |
| US7273249B1 (en) * | 2006-10-20 | 2007-09-25 | Taiwan Shin Yeh Enterprise Co., Ltd. | Foldable chair |
| JP2008253426A (en) * | 2007-04-03 | 2008-10-23 | Iura Co Ltd | Separation type bathing carry |
| EP2210794A2 (en) * | 2009-01-23 | 2010-07-28 | Nuna International B.V. | Buggy provided with a braking mechanism |
| CN203739935U (en) * | 2013-12-31 | 2014-07-30 | 好孩子儿童用品有限公司 | Foldable stroller |
| CN207449991U (en) * | 2017-03-09 | 2018-06-05 | 庄育霖 | Foldable pushchair |
| CN207996268U (en) * | 2017-12-10 | 2018-10-23 | 祝龙球 | A kind of folding light shape electric wheelchair |
| CN109394440A (en) * | 2018-03-27 | 2019-03-01 | 美利驰医疗器械（苏州）有限公司 | Safety-type, the facilitation electric wheelchair of one kind and its working method |
| CN209220730U (en) * | 2018-04-09 | 2019-08-09 | 南京金百合医疗器械有限公司 | A kind of built-in contact cell Quick Release electric wheelchair |
| CN210078087U (en) * | 2019-04-16 | 2020-02-18 | 江苏福维健康科技有限公司 | Wheelchair backrest folding and unlocking mechanism |
| CN111067726A (en) * | 2020-01-03 | 2020-04-28 | 福佑康智能医疗科技(昆山)有限公司 | Multifunctional electric wheelchair |
| CN113730116A (en) * | 2021-09-24 | 2021-12-03 | 浙江爱司米电气有限公司 | Foldable wheelchair |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113730122A (en) | 2021-12-03 |
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