CN113730122A - Locking mechanism of foldable wheelchair - Google Patents
Locking mechanism of foldable wheelchair Download PDFInfo
- Publication number
- CN113730122A CN113730122A CN202111133824.2A CN202111133824A CN113730122A CN 113730122 A CN113730122 A CN 113730122A CN 202111133824 A CN202111133824 A CN 202111133824A CN 113730122 A CN113730122 A CN 113730122A
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- Prior art keywords
- locking
- rod
- connecting rod
- plate
- locking mechanism
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- 230000007246 mechanism Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000009471 action Effects 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
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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
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Handcart (AREA)
Abstract
The invention provides a locking mechanism of a foldable wheelchair, which comprises a locking rod connected on 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 on 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 on the outer side of the rear wheel bracket through a rotating shaft, the rotating shaft axis of the locking plate is superposed with the shaft axis of the connecting rod, the rotating shaft is positioned below the locking rod and the connecting rod, so that the distance between the rotating shaft and the locking rod and the connecting rod are equal, a groove matched with the locking rod is arranged on the locking plate, the groove can be driven to be buckled with or separated from the locking rod through the rotation of the locking plate, the locking and unlocking of the locking mechanism are realized, the groove and the locking rod are exposed, the fault point can be quickly judged, and the maintenance and replacement operations are convenient, the contact area of the groove and the locking rod is large, the locking force is large, the impact resistance is high, the damage is not easy to occur, and the durability is good.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a locking mechanism of a foldable wheelchair.
Background
In the process of treating and recovering patients, particularly for patients who cannot walk independently, the wheelchair mode is usually adopted to replace walking, so that the patients can be treated and recovered well, and the daily life of the patients is facilitated.
For storage, foldable wheelchairs are available in the market, which are basically provided with a locking mechanism for locking a foldable wheelchair frame, and the existing locking mechanism mostly realizes the locking of the axial rotation of a shaft or a shaft sleeve by arranging a locking piece between the shaft and the shaft sleeve, for example, the locking mechanism disclosed in chinese patent CN212235014U has at least the following defects:
1. each part is small in size and is located inside the shaft sleeve, fault points are difficult to judge quickly, and overhauling and replacing operations are inconvenient.
2. The area of each part for matching is small, the locking force is small, the impact resistance is poor, the damage is easy, and the durability is poor.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a locking mechanism of a foldable wheelchair, which can quickly judge fault points, is convenient to overhaul and replace, has large 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 for a foldable wheelchair, comprising:
the locking rod is connected to a 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 can be rotatably connected to the outer side of the rear wheel bracket through a rotating shaft;
a connecting rod vertically connected to the connecting plate, the connecting rod extending in a direction parallel to the locking lever;
the locking plate is rotatably sleeved on the connecting rod, and the rotating axis line of the locking plate is superposed with the axis line of the connecting rod;
the rotating shaft is positioned below the locking rod and the connecting rod, and the distances between the rotating shaft and the locking rod are equal; 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 rod can be driven to rotate relative to the locking rod when the connecting plate rotates.
Preferably, the connecting rod is sleeved with a torsion spring, two end parts of the torsion spring are respectively connected with the connecting rod and the locking plate, and the torsion spring has a tendency of driving the locking plate to rotate downwards so that the locking mechanism is converted to a locking state.
Further preferably, the two end parts of the locking plate are connected with short tubes, and a cavity for accommodating the torsion spring is arranged between the inner wall of each short tube and the 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 position 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, one side of the torsion spring cover, which is close to the locking rod, is provided with a protruding part, the side wall of the protruding part, which faces the connecting rod, is provided with a positioning groove matched with the locking rod, and when the connecting plate rotates forwards to a limit position relative to the rear wheel support, the inner wall of the positioning groove is attached to and abutted against the outer wall of the locking rod.
Further preferably, a first protrusion extending toward the locking plate is disposed on a side wall of the protrusion portion close to the locking plate, a second protrusion extending in a radial direction of the connecting rod is disposed on an outer wall of the short tube, and when the locking plate rotates downward to a limit position relative to the connecting rod, the second protrusion abuts against the first protrusion.
Preferably, the locking plate is provided with an inclined surface on the end surface close to the locking rod, and when the connecting plate rotates forwards, the inclined surface abuts against the outer wall of the locking rod to enable the locking plate to rotate upwards, so that the inner wall of the positioning groove can abut against the 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 °.
Further preferably, when the lock mechanism is in the locked state, the axis of the connecting rod is located above the axis of the lock lever.
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 locking rod is connected to the rear wheel bracket of the foldable wheelchair, the connecting plate is used for connecting the front wheel of the foldable wheelchair and the backrest bracket, the connecting rod is vertically connected to the connecting plate and extends in the direction parallel to the locking rod, the locking plate is rotatably sleeved on the connecting rod, the connecting plate is rotatably connected to the outer side of the rear wheel bracket through the rotating shaft, the rotating shaft axis of the locking plate is overlapped with the shaft 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 to the distance between the rotating shaft and the locking rod, the groove matched with the locking rod is formed in the locking plate, the relative position of the connecting rod and the locking rod on the locking rod is locked by buckling the groove through downward overturning of the locking plate, the technical effect of locking the relative position of the connecting plate and the rear wheel bracket is further realized, and the technical effect of driving the connecting rod to rotate relative to the locking rod when the connecting plate is separated from the locking rod through upward overturning of the locking plate and the connecting rod is realized The groove and the locking rod are exposed, so that the fault point can be quickly judged, and the maintenance and replacement operations are convenient, the contact area of the groove and the locking rod in the axial direction of the locking rod is large, the locking force is large, the impact resistance is high, the damage is not easy to occur, and the durability is good.
Drawings
Fig. 1 is a perspective assembled and exploded view of a preferred embodiment of the present invention.
FIG. 2 is a cross-sectional schematic view at the locking plate of FIG. 1 with the locking mechanism in a locked condition.
FIG. 3 is a cross-sectional schematic view at the locking plate of FIG. 1 with the locking mechanism in an unlocked state.
Wherein: 10. a locking lever; 11. a rear wheel support; 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. a bevel; 50. a torsion spring cover; 51. a locking bolt; 52. a projection; 521. positioning a groove; 522. a first protrusion.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
The front-back, left-right, up-down directions described in the present invention are the front-back, left-right, up-down directions in fig. 1.
As shown in fig. 1 to 3, the present invention provides a locking mechanism of a foldable wheelchair, comprising: 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 along 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 lever 10; the locking plate 40 is rotatably sleeved on the connecting rod 30, and the rotating axis of the locking plate 40 is coincided with the axis of the connecting rod 30; the rotating shaft 21 is positioned below the locking lever 10 and the connecting rod 30, and the distances between the rotating shaft 21 and the locking lever 10 and the connecting rod 30 are 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 axis of the connecting rod 30 to be positioned above the axis of the locking rod 10, the locking plate 40 overturns downwards to enable the groove 41 to be buckled on the locking rod 10, so that 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 disengage the groove 41 from the locking rod 10, and the connecting rod 30 can be driven to rotate relative to the locking rod 10 when the connecting plate 20 rotates.
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 during unusual, overhaul and change convenient operation, and the area of contact of recess and locking lever is big, and locking power is big, shock-resistant, not fragile, durability is good.
In this embodiment, the connecting rod 30 is sleeved with a torsion spring 31, two end portions 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 downward to change the locking mechanism to the locking state, two end portions of the locking plate 40 are connected with short tubes 42, and a cavity for accommodating the torsion spring 31 is arranged between an inner wall of the short tube 42 and an outer wall of the connecting rod 30.
The advantage of this setting is that can drive the lockplate through the torsional spring and rotate, possesses the function of automatic locking.
Further, the end surface of the locking plate 40 close to the locking rod 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 rod 10, so that the inner wall of the positioning groove 521 can abut against the outer wall of the locking rod 10.
The advantage of this arrangement is that the automatic locking function of the locking plate can be achieved by the rotation of the connecting plate in cooperation with the action of the torsion spring.
In order to avoid the spring from springing out, 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 position of the torsion spring cover 50 and the connecting rod 30 is disposed 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, one side of the torsion spring cover 50 close to the locking rod 10 is provided with a protrusion 52, the side wall of the protrusion 52 facing the connecting rod 30 is provided with a positioning groove 521 matched with the locking rod 10, the positioning groove 521 is an arc groove with an arc degree equal to 180 °, when the connecting plate 20 rotates forwards relative to the rear wheel bracket 11 to a limit position, the inner wall of the positioning groove 521 is attached to and abutted against the outer wall of the locking rod 10, the side wall of the protrusion 52 close to the locking plate 40 is provided with a first protrusion 522 extending towards the locking plate 40, the outer wall of the short pipe 42 is provided with a second protrusion 421 extending along the radial direction of the connecting rod 30, and when the locking plate 40 rotates downwards relative to the connecting rod 30 to the limit position, the second protrusion 421 abuts against the first protrusion 522.
The advantage that sets up like this is that can realize the limited position when locking plate and connecting plate rotate through simple structure cooperation, further promotes the security and the stability when this locking mechanical system uses.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (10)
1. A locking mechanism for a foldable wheelchair comprising:
the locking rod is connected to a 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 can be rotatably connected to the outer side of the rear wheel bracket through a rotating shaft;
a connecting rod vertically connected to the connecting plate, the connecting rod extending in a direction parallel to the locking lever;
the locking plate is rotatably sleeved on the connecting rod, and the rotation of the locking plate
The moving axis is coincided 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, and the distances between the rotating shaft and the locking rod are equal;
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 rod can be driven to rotate relative to the locking rod when the connecting plate rotates.
2. The locking mechanism of a foldable wheelchair as claimed in claim 1, wherein: the connecting rod is sleeved with a torsion spring, two end parts of the torsion spring are respectively connected with the connecting rod and the locking plate, and the torsion spring has a tendency of driving the locking plate to rotate downwards so that the locking mechanism is converted to a locking state.
3. The locking mechanism of a foldable wheelchair as claimed in claim 2, wherein: the two ends of the locking plate are connected with short pipes, and a cavity for accommodating the torsion spring is arranged between the inner walls of the short pipes and the outer walls of the connecting rods.
4. The locking mechanism of a foldable wheelchair as claimed in claim 3, wherein: the locking mechanism further comprises a torsional spring cover used for sealing the cavity, and the torsional spring cover is slidably sleeved on the connecting rod.
5. The locking mechanism of a foldable wheelchair as claimed in claim 4, wherein: the torsion spring cover is provided with a locking bolt used for locking the relative position 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.
6. The locking mechanism of a foldable wheelchair as claimed in claim 4, wherein: the connecting plate is characterized in that a bulge is arranged on one side, close to the locking rod, of the torsion spring cover, the bulge faces towards the side wall of the connecting rod and is provided with a positioning groove matched with the locking rod, and when the connecting plate rotates forwards to the limit position relative to the rear wheel support, the inner wall of the positioning groove is attached to and abutted against the outer wall of the locking rod.
7. The locking mechanism of a foldable wheelchair as claimed in claim 6, wherein: the lateral wall that the bulge is close to the lockplate is provided with the first arch that extends to the lockplate, be equipped with on the outer wall of nozzle stub along the second arch of connecting rod radial direction extension, when the lockplate for the connecting rod downwardly rotating reaches extreme position, the second arch with first arch offsets tightly.
8. The locking mechanism of a foldable wheelchair as claimed in claim 6, wherein: the end face, close to the locking rod, of the locking plate is provided with an inclined surface, when the connecting plate rotates forwards, the inclined surface abuts against the outer wall of the locking rod to enable the locking plate to rotate upwards, and the inner wall of the positioning groove can abut against the outer wall of the locking rod.
9. The locking mechanism of a foldable wheelchair as claimed in claim 6, wherein: the positioning groove is an arc groove, and the radian of the positioning groove is less than or equal to 180 degrees.
10. A locking mechanism for a foldable wheelchair in accordance with any one of claims 1-9, wherein: when the locking mechanism is in a locked state, the axis of the connecting rod is located above the axis 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 true CN113730122A (en) | 2021-12-03 |
| CN113730122B CN113730122B (en) | 2024-04-09 |
Family
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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) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113730116A (en) * | 2021-09-24 | 2021-12-03 | 浙江爱司米电气有限公司 | Foldable wheelchair |
| WO2024131022A1 (en) * | 2022-12-19 | 2024-06-27 | 苏州点铁工业设计有限公司 | Wheelchair armrest structure, wheelchair cushioning structure, and foldable wheelchair |
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| US20200008990A1 (en) * | 2015-04-22 | 2020-01-09 | Brian Harrison | A reconfigurable wheeled personal mobility device |
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| CN113730116A (en) * | 2021-09-24 | 2021-12-03 | 浙江爱司米电气有限公司 | Foldable wheelchair |
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2021
- 2021-09-27 CN CN202111133824.2A patent/CN113730122B/en active Active
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| 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 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2024131022A1 (en) * | 2022-12-19 | 2024-06-27 | 苏州点铁工业设计有限公司 | Wheelchair armrest structure, wheelchair cushioning structure, and foldable wheelchair |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113730122B (en) | 2024-04-09 |
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