CN114668595B - Self-locking mechanism and folding chair with same - Google Patents
Self-locking mechanism and folding chair with same Download PDFInfo
- Publication number
- CN114668595B CN114668595B CN202210333329.4A CN202210333329A CN114668595B CN 114668595 B CN114668595 B CN 114668595B CN 202210333329 A CN202210333329 A CN 202210333329A CN 114668595 B CN114668595 B CN 114668595B
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- Prior art keywords
- sleeve
- self
- section
- arc
- shaped guide
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- 230000007246 mechanism Effects 0.000 title claims abstract description 14
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 241001166076 Diapheromera femorata Species 0.000 description 4
- 230000006872 improvement Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000007306 turnover 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
- A61G5/10—Parts, details or accessories
- A61G5/1056—Arrangements for adjusting the seat
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
- A45B5/00—Walking sticks or umbrellas convertible into seats; Hunting sticks
-
- 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
- A61G5/0808—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction
- A61G5/0833—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding front to back, e.g. reducing or expanding the overall depth of the wheelchair
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
- Special Chairs (AREA)
Abstract
The invention relates to a self-locking mechanism and a folding chair with the same, which belong to the technical field of daily living appliances. The folding chair comprises the self-locking mechanism. The invention can realize self-locking and unlocking in 90 degrees in the same direction and is convenient to use.
Description
Technical Field
The invention relates to the technical field of daily living appliances, in particular to a self-locking mechanism and a folding chair with the same.
Background
Chairs are well known as living appliances for people to rest. In order to adapt to different crowds, the prior art designs the chair to be used as a crutch, so that the chair has the function of sitting on the chair and the function of assisting walking, thereby being suitable for old people or patients.
When the crutch is used as a crutch, the sitting plate is required to be folded, the space between the two handles is exposed, the body is convenient to be positioned between the two handles, and the two handles are held by the two handles. However, at this time, the seat plate has no fixing structure and can turn down at any time to affect walking of the walking stick, so that the walking stick is required to be propped against the body to prevent the rotation of the walking stick during use, and thus, the walking stick is very troublesome to use and inconvenient to use.
Therefore, the existing seat plate structure needs to be improved, so that the seat plate structure is fixed in a high position and free in a low position, thereby being convenient for the old or the patient to use.
Meanwhile, the design of the self-locking mechanism needs to consider the problem of folding angle, and the seat plate can only rotate 90 degrees due to the limitation of the backrest and the bearing body, so that the adaptive design is a priority problem.
Disclosure of Invention
Therefore, the invention aims to provide a self-locking mechanism and a folding chair with the same, which can finish self-locking and unlocking within 90 degrees so as to solve the problem that the prior art has no self-locking structure and is inconvenient to use.
One of the invention is realized by the following technical scheme:
the self-locking mechanism comprises a first sleeve and a second sleeve sleeved outside the first sleeve,
an annular latch is arranged on one end face of the first sleeve, an annular clamping groove which is clamped with the annular latch is arranged on the same side of the annular latch end of the second sleeve,
the novel annular clamping device is characterized in that an arc-shaped guide groove is formed in the outer wall of the first sleeve, a sliding block sliding in the arc-shaped guide groove is arranged on the inner wall of the second sleeve, and when the sliding block slides along the arc-shaped guide groove, rotation and axial displacement occur between the first sleeve and the second sleeve, and at least annular clamping teeth are clamped with the annular clamping groove once.
Further, the center angle of the arc-shaped guide groove is 90 degrees.
Further, the arc-shaped guide groove comprises a self-locking section which is farthest from the axial distance of the annular latch, and the self-locking section is a straight line section with a central angle of 10+/-5 degrees.
Further, the arc-shaped guide groove further comprises an unlocking section which is connected with the self-locking section and has a central angle of 5 degrees+/-2 degrees.
Further, the arcuate guide slot also includes an entry section into the self-locking section.
Further, the arc-shaped guide groove further comprises a free section, and the free section is respectively communicated with the unlocking section and the inlet section.
Further, the arcuate guide slot also includes an initial section in communication with the inlet section.
The second invention is realized by the following technical scheme:
the folding chair is provided with two handles, a connecting rod is arranged between the two handles, a seat plate is rotatably arranged on the connecting rod, two rotating sleeves are arranged on the seat plate, and the self-locking structure is arranged between any rotating sleeve and the connecting rod.
Further, the rotating sleeve is sleeved and fixed on the second sleeve, the second sleeve is rotatably arranged on the connecting rod, and the first sleeve is sleeved on the connecting rod in a sliding manner.
The invention has the beneficial effects that:
according to the invention, the second sleeve is sleeved outside the first sleeve, the clamping teeth are arranged on the end face of the first sleeve, the clamping grooves are arranged on the second sleeve, the arc-shaped guide grooves are arranged outside the first sleeve, the sliding blocks are arranged in the second sleeve, and when the sliding blocks slide along the circumferential direction of the arc-shaped guide grooves, the first sleeve and the second sleeve rotate and axially displace, so that the clamping teeth and the clamping grooves are clamped at least once, and self-locking is realized. When the self-locking structure is used for a folding chair, the seat plate can be self-locked and fixed in a high position and is free in a low position, so that the seat plate is prevented from falling down in the high position to influence walking.
In a word, the invention can realize self-locking and unlocking in 90 degrees in the same direction through innovative design.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
FIG. 1 is a three-dimensional schematic view of a self-locking mechanism according to the present invention
FIG. 2 is a three-dimensional schematic view of a first sleeve according to the present invention;
FIG. 3 is a front view of FIG. 2;
FIG. 4 is a top view of FIG. 2;
FIG. 5 is a three-dimensional schematic view of a second sleeve of the present invention;
FIG. 6 is a front view of FIG. 5;
FIG. 7 is a top view of FIG. 5;
FIG. 8 is a three-dimensional schematic view of a folding chair of the present invention;
FIG. 9 is a schematic view of the folding chair of the present invention after the seat is folded;
fig. 10 is a specific configuration view of the arc-shaped guide groove.
Reference numerals:
1-a first sleeve; 2-a second sleeve; 3-annular latch teeth; 4-an annular clamping groove; 5-arc-shaped guide grooves; 6-sliding blocks; 7-a self-locking section; 8-unlocking the section; 9-an inlet section; 10-free section; 11-an initial section; 12-handle; 13-connecting rods; 14-sitting plate.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the foregoing description of the invention, it should be noted that the azimuth or positional relationship indicated by the terms "one side", "the other side", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "identical" and the like do not denote that the components are identical, but rather that there may be minor differences. The term "perpendicular" merely means that the positional relationship between the components is more perpendicular than "parallel" and does not mean that the structure must be perfectly perpendicular, but may be slightly tilted.
As shown in fig. 1 to 10, the present embodiment provides a self-locking mechanism, which includes a first sleeve 1 and a second sleeve 2, wherein the second sleeve is sleeved outside the first sleeve and can rotate relatively, in particular:
the first sleeve is provided with an annular latch 3 on one end face, the shape of the latch is not limited, the latch can be square, triangle and the like, the second sleeve is provided with an annular clamping groove 4 which is clamped with the annular latch on the same side of the annular latch end, so that the annular latch and the annular slot can be clamped and fixed,
the outer wall of the first sleeve is provided with an arc-shaped guide groove 5, the inner wall of the second sleeve is provided with a sliding block 6 which is used for sliding in the arc-shaped guide groove, when the sliding block slides along the arc-shaped guide groove, rotation and axial displacement occur between the first sleeve and the second sleeve, the sliding block moves for one circle along the arc-shaped guide groove, and at least the annular clamping teeth are clamped with the annular clamping groove once, so that self-locking is realized once.
As a modification of this embodiment, the center angle of the arc-shaped guide groove is 90 °, as shown in fig. 4. Thus, the second sleeve can be rotated by 90 degrees along the first sleeve to realize self-locking once.
As an improvement of the embodiment, the arc-shaped guide groove comprises a self-locking section 7 which is farthest from the axial direction of the annular latch, and the self-locking section is a straight line section with a central angle of 10 degrees plus or minus 5 degrees. Through the straight line section of about 10 degrees, the self-locking of a distance between the second sleeve and the first sleeve can be maintained, so that loosening or separation is prevented, and the self-locking effect is better.
As an improvement of this embodiment, the arcuate guide slot further comprises an unlocking segment 8 connected to the self-locking segment, as shown, the unlocking segment being an inclined segment whose circumferential span is 5 ° ± 2 ° from the center angle. In this way, unlocking can be accomplished over a distance, preventing too fast loosening or disengagement.
As a modification of this embodiment, the arcuate guide slot also includes an entry section 9 into the self-locking section. The inlet section has a gradually increasing taper to facilitate entry.
As a modification of this embodiment, the arcuate guide slot further includes a free section 10 in communication with the unlocking section and the inlet section, respectively. Thereby realizing free, self-locking, unlocking and free circulation.
As a modification of this embodiment, the arcuate guide slot also includes an initial section 11 in communication with the inlet section. The initial section is closest to the annular snap face and is inclined toward the inlet section. Even if the latch approaches the catch slowly.
The self-locking mechanism of the embodiment can be applied to a plurality of occasions, such as chairs, tables and other various places with turnover, and the chair is taken as an example for further explanation below:
as shown in fig. 8 and 9, a folding chair for old people or patients is provided with a handle 12 on each of the left and right sides, a connecting rod 13 on the front side between the two handles, a seat 14 rotatably provided on the connecting rod, two rotating sleeves provided on the seat, and the self-locking structure as described above provided between either rotating sleeve and the connecting rod.
Further, the rotating sleeve is sleeved and fixed on the second sleeve, the second sleeve is rotationally arranged on the connecting rod through the rolling bearing, the first sleeve is sleeved on the connecting rod, a key or a key groove is arranged on the first sleeve, and the key groove or the key is arranged on the connecting rod, so that the two have horizontal movement freedom degrees and have no rotation freedom degrees, and relative sliding between the two is realized.
In order to realize fixation when the seat plate is turned up, the sliding block and the self-locking section are clamped and arranged at the position of 75-85 DEG when the seat plate is turned up, and the seat plate is unlocked at 85-90 deg. Therefore, unlocking can be realized only by slightly lifting, and the unlocking device is very convenient and concise to use.
In a word, the embodiment achieves the design goal of completing self-locking and unlocking in one direction within 90 degrees.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (4)
1. The self-locking mechanism is characterized in that: comprises a first sleeve and a second sleeve sleeved outside the first sleeve, wherein an annular latch is arranged on one end face of the first sleeve, an annular clamping groove which is clamped with the annular latch is arranged on the same side of the annular latch end of the second sleeve,
the novel self-locking device is characterized in that an arc-shaped guide groove is formed in the outer wall of the first sleeve, a sliding block sliding in the arc-shaped guide groove is arranged on the inner wall of the second sleeve, when the sliding block slides along the arc-shaped guide groove, rotation and axial displacement occur between the first sleeve and the second sleeve, at least annular clamping teeth are clamped with the annular clamping groove once, the arc-shaped guide groove comprises a self-locking section farthest from the annular clamping teeth by an axial distance, the self-locking section is a straight line section with a central angle of 10 DEG + -5 DEG, the arc-shaped guide groove further comprises an unlocking section which is connected with the self-locking section and has a central angle of 5 DEG + -2 DEG, the arc-shaped guide groove further comprises an inlet section which enters the self-locking section, the free section is respectively communicated with the unlocking section and the inlet section, and the arc-shaped guide groove further comprises an initial section communicated with the inlet section.
2. The self-locking mechanism of claim 1, wherein: the center angle of the arc-shaped guide groove is 90 degrees.
3. A folding chair, characterized in that: the folding chair is provided with two handles, a connecting rod is arranged between the two handles, a seat is rotatably arranged on the connecting rod, two rotating sleeves are arranged on the seat, and a self-locking mechanism as claimed in any one of claims 1-2 is arranged between any one of the rotating sleeves and the connecting rod.
4. A folding chair as claimed in claim 3, wherein: the rotating sleeve is sleeved and fixed on the second sleeve, the second sleeve is rotatably arranged on the connecting rod, and the first sleeve is sleeved on the connecting rod in a sliding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210333329.4A CN114668595B (en) | 2022-03-30 | 2022-03-30 | Self-locking mechanism and folding chair with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210333329.4A CN114668595B (en) | 2022-03-30 | 2022-03-30 | Self-locking mechanism and folding chair with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114668595A CN114668595A (en) | 2022-06-28 |
| CN114668595B true CN114668595B (en) | 2024-01-19 |
Family
ID=82075453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210333329.4A Active CN114668595B (en) | 2022-03-30 | 2022-03-30 | Self-locking mechanism and folding chair with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114668595B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013215494A (en) * | 2012-04-12 | 2013-10-24 | Jd Japan Kk | Handle shaft folding device for kick scooter |
| CN106122209A (en) * | 2016-08-18 | 2016-11-16 | 北京可以科技有限公司 | A kind of buckle |
| CN108323969A (en) * | 2018-03-12 | 2018-07-27 | 无锡晶美精密滑轨有限公司 | Sliding rail mechanical self-latching structure |
| EP3689546A1 (en) * | 2019-01-31 | 2020-08-05 | Proxene Tools Co., Ltd. | Pipe wrench |
| CN211393452U (en) * | 2019-09-28 | 2020-09-01 | 张家港市启元电梯配件制造有限公司 | Box elevator safety tongs |
| KR102178475B1 (en) * | 2020-04-17 | 2020-11-13 | 유연순 | Chair caster with self-locking function |
| CN212465143U (en) * | 2020-11-24 | 2021-02-05 | 常州博显汽车电子有限公司 | Safety belt joint |
-
2022
- 2022-03-30 CN CN202210333329.4A patent/CN114668595B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013215494A (en) * | 2012-04-12 | 2013-10-24 | Jd Japan Kk | Handle shaft folding device for kick scooter |
| CN106122209A (en) * | 2016-08-18 | 2016-11-16 | 北京可以科技有限公司 | A kind of buckle |
| CN108323969A (en) * | 2018-03-12 | 2018-07-27 | 无锡晶美精密滑轨有限公司 | Sliding rail mechanical self-latching structure |
| EP3689546A1 (en) * | 2019-01-31 | 2020-08-05 | Proxene Tools Co., Ltd. | Pipe wrench |
| CN211393452U (en) * | 2019-09-28 | 2020-09-01 | 张家港市启元电梯配件制造有限公司 | Box elevator safety tongs |
| KR102178475B1 (en) * | 2020-04-17 | 2020-11-13 | 유연순 | Chair caster with self-locking function |
| CN212465143U (en) * | 2020-11-24 | 2021-02-05 | 常州博显汽车电子有限公司 | Safety belt joint |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114668595A (en) | 2022-06-28 |
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