CN217722965U - Folding afternoon nap chair - Google Patents

Abstract

The utility model discloses a folding afternoon nap chair, which comprises a supporting main body; the cushion is horizontally and fixedly arranged above the supporting main body; a backrest rotatably connected to one end of the seat cushion; a rotary locking mechanism connected between the seat cushion and the backrest, the rotary locking mechanism including a locking mechanism assembly mounted on the support body and a rotary member connected to the backrest, the rotary member having a locked state fixed relative to the locking mechanism assembly and an unlocked state rotationally relative to the locking mechanism assembly; in the unlocking state, the backrest can rotate relative to the support body along with the rotating piece so as to change an included angle between the backrest and the seat cushion. The rotary control of the backrest can be realized, the problem of the student during afternoon nap is solved, and the afternoon nap of the student is easy and comfortable. The backrest is rotated by rotating the locking mechanism, so that students can lie for afternoon nap and can use the chair as a normal chair for class in other time.

Description

Folding afternoon nap chair

Technical Field

The utility model belongs to the technical field of furniture, concretely relates to folding afternoon nap chair.

Background

The backrest and the cushion of the existing chair are generally in fixed design, the angle of the backrest cannot be adjusted, and various sitting and lying postures of a human body are difficult to satisfy. While a seat with an adjustable partial backrest usually has a rotating arm at one side or in the middle of the connection between the backrest and the seat, the stability of this structure is not good. In addition, the structure of some angle adjusting mechanisms is too complex and complicated to operate. For students, the existing conventional chair with a fixed backrest cannot meet the use requirements, the school industry of the students is heavy and needs afternoon nap generally, and the existing conventional chair is suitable for the afternoon nap of the students, is uncomfortable to sleep, is not good for the bodies of the students and influences the body development and growth of the students. Therefore, it is necessary to develop a chair for students which has a simple structure and high stability and can adjust the angle of the backrest.

SUMMERY OF THE UTILITY MODEL

To the technical problem that exists, the utility model provides a folding afternoon nap chair solves the problem of student when afternoon nap, makes student's afternoon nap become light, comfortable, and the student can lie afternoon nap, and all the other times can be as normal chair use and give class.

The technical scheme of the utility model is that:

an object of the utility model is to provide a folding afternoon nap chair, include:

a support body;

the cushion is horizontally and fixedly arranged above the supporting main body;

the backrest is rotatably connected to one end of the seat cushion;

a rotary lock mechanism connected between the seat cushion and the backrest, the rotary lock mechanism including a lock mechanism assembly mounted on the support body and a rotary member connected to the backrest, the rotary member having a locked state fixed relative to the lock mechanism assembly and an unlocked state rotationally relative to the lock mechanism assembly;

when the backrest is in the unlocking state, the backrest can rotate relative to the support main body along with the rotating piece so as to change an included angle between the backrest and the seat cushion.

Preferably, the locking mechanism assembly comprises:

a housing member having a mounting cavity therein;

the two sliding parts are arranged in the mounting cavity of the shell part in a relatively sliding manner;

the driving piece can be movably arranged in the mounting cavity of the outer shell piece along the sliding direction vertical to the two sliding pieces and is used for driving the two sliding pieces to move relatively close to each other;

an elastic member provided between the two sliding members and applying a biasing force in a direction away from each other to the two sliding members;

the driving part is provided with a driving part and an operating part, two first inclined planes which are symmetrical and arranged at intervals are formed on the driving part, and second inclined planes which are in one-to-one correspondence with the two first inclined planes and are in movable contact with the two first inclined planes are respectively formed on the end surfaces, far away from the elastic part, of the two sliding parts;

a first avoidance hole for the operating part to enter and exit is formed in the outer shell part, disc-shaped rotary matching parts are formed at two ends of the outer shell part respectively, a second avoidance hole which is axially communicated with any one of the rotary matching parts and is used for the corresponding sliding part to enter and exit at the end part, far away from the elastic part, of the sliding part is formed in any one of the rotary matching parts, and a first connecting part connected with the cushion or the support main body is formed on the outer peripheral surface of any one of the rotary matching parts;

the two rotating pieces are in one-to-one corresponding rotating fit on the two rotating fit parts, at least two locking parts are arranged on the end face, matched with the corresponding rotating fit part, of any one rotating piece at intervals along the circumferential direction, and a second connecting part connected with the backrest is formed on the outer circumferential surface of any one rotating piece;

the driving piece drives the two sliding pieces to move close to each other under the action of external force so as to enable the rotating piece and the shell piece to be switched from a locking state to an unlocking state; after the external force is released, the two sliding pieces are driven by the elastic piece to move away from each other and selectively cooperate with one of the locking parts on the corresponding rotating piece, so that the seat cushion connected with the first connecting part and the backrest connected with the second connecting part are switched to a locking state of a required angle position.

Preferably, one of the mutually matching surfaces of any one of the rotating pieces and the corresponding rotary matching part is provided with a boss limiting part, and the other of the mutually matching surfaces of any one of the rotating pieces and the corresponding rotary matching part is provided with a groove limiting part matched with the boss limiting part;

the rotating pieces have an initial position, a first position and a second position relative to the rotating fitting parts corresponding to the rotating pieces respectively;

in the initial position, the end parts of the two sliding parts far away from the elastic part are matched with one locking part on the corresponding rotating part, and the first connecting part and the second connecting part form a first included angle;

when the sliding piece is in the first position, the end parts, far away from the elastic piece, of the two sliding pieces are matched with the other locking part on the corresponding rotating piece, and the first connecting part and the second connecting part form a second included angle which is larger than the first included angle;

when the second position, two keeping away from of slider the tip of elastic component does not with corresponding any locking portion cooperation on the rotating member just the lateral wall of the spacing portion of boss with the lateral wall contact of the spacing portion of recess is spacing, first connecting portion with the second connecting portion become to be greater than the third contained angle of second contained angle.

Preferably, the housing member has a track therein in sliding engagement with both of the slide members.

Preferably, each sliding part comprises a sliding block and a movable pin, and two ends of each elastic part are respectively connected with the sliding blocks of the two sliding parts;

the movable pin is arranged at one end, far away from the elastic piece, of the corresponding sliding block and is inserted into the locking part on the corresponding rotating piece in the locking state;

the second inclined surface is formed at one end of the sliding block far away from the elastic piece.

Preferably, the method further comprises the following steps:

the supporter is arranged at the bottom of the cushion.

Preferably, the commodity shelf can be stretched and contracted along the length direction of the commodity shelf.

Preferably, one end of the article carrier is rotatably connected with one end of the supporting top part of the supporting main body, which is used for supporting the seat cushion and is far away from the backrest, and the other end of the article carrier is a free end and can be dragged by a U-shaped suspender which is fixedly arranged at one end of the supporting top part, which is close to the backrest, in an initial position.

Preferably, a horizontal hollow rotating shaft is arranged on the inner wall of one end, away from the backrest, of the storage rack, a U-shaped rotating rod is connected in the hollow rotating shaft in a rotating mode, and the storage rack is connected with the top of the support in a rotating mode through the U-shaped rotating rod;

two first clamping grooves are formed in one end, far away from the backrest, of the storage rack at an initial position at intervals;

when the first position with during the second position, the supporter winds behind the bull stick upset and through the bull stick joint is in the first draw-in groove and fix the state that the bottom surface is up.

Preferably, a second clamping groove for clamping the hanging rod is arranged at the bottom of one end, close to the backrest, of the article placing rack in the initial position.

Compared with the prior art, the utility model has the advantages that: the chair has a simple structure, is convenient to operate, can realize the rotation control of the backrest, solves the problem of the student during afternoon nap, and makes the afternoon nap of the student easy and comfortable. The backrest is rotated by rotating the locking mechanism, so that students can lie for afternoon nap and can use the chair as a normal chair for class in other time. The students can carry out the afternoon nap activity more conveniently, and the afternoon nap becomes easy and comfortable.

Drawings

The invention will be further described with reference to the following drawings and examples:

fig. 1 is a schematic perspective view of a seat cushion of a foldable afternoon nap chair in an initial position relative to a backrest in an embodiment of the present invention;

fig. 2 is a schematic structural view of the rotating member of the rotary locking mechanism of the foldable afternoon nap chair of the present invention at an initial position relative to the locking mechanism assembly;

FIG. 3 is a cross-sectional structural schematic view of the rotary locking mechanism shown in FIG. 2;

fig. 4 is an exploded view of the rotary locking mechanism of the foldable afternoon nap chair according to the embodiment of the present invention;

fig. 5 is a schematic top view of the bottom shell of the rotary locking mechanism of the foldable afternoon nap chair according to the embodiment of the present invention;

fig. 6 is a schematic structural view of the backrest of the foldable afternoon nap chair of the embodiment of the present invention in a first position relative to the seat cushion;

fig. 7 is a schematic structural view of the rotating member of the rotary locking mechanism of the foldable afternoon nap chair of the present invention in a first position relative to the locking mechanism assembly;

fig. 8 is a schematic structural view of the backrest of the foldable afternoon nap chair in the second position relative to the seat cushion in the embodiment of the present invention;

fig. 9 is a schematic structural view of the rotary member of the rotary locking mechanism of the foldable afternoon nap chair of the present invention in the second position relative to the locking mechanism assembly (the seat cushion is omitted in the figure);

FIG. 10 is a schematic view of the swivel member of the folding afternoon chair of the present invention in a first position relative to the housing member;

fig. 11 is a schematic view of the swivel member of the foldable afternoon chair of the present invention in a second position relative to the housing member.

Wherein: 100. a rotation locking mechanism; 1. a housing member; 10. a mounting cavity; 11. a housing; 111. a bottom case; 1111. a track; 1112. a limiting track; 112. an upper cover; 1121. a first avoidance hole; 12. a rotation fitting part; 121. a first connection portion; 122. a groove limiting part; 123. a second avoidance hole; 124. a second shaft portion; 2. a rotating member; 21. a second connecting portion; 22. a boss limiting part; 23. a first locking portion; 24. a second lock portion; 25. a first shaft portion; 251. a first shaft hole; 3. a drive member; 31. an operation unit; 32. a drive section; 321. a first inclined plane; 322. a recess; 4. a slider; 41. a movable pin; 42. a second inclined plane; 5. an elastic member; 6. a pin shaft; 7. a positioning column; 200. a support body; 210. a support top; 300. a cushion; 400. a backrest; 500. a rack; 501. a shelf body; 502. a sliding rack; 503. a hollow rotating shaft; 504. a first card slot; 505. a second card slot; 506. a chute; 510. a rotating rod; 520. a boom.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended for purposes of illustration only and is not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

It should be noted that, if directional indications (such as up, down, first, second, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative relationship between the components, the motion situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if the present invention relates to the description of "first", "second", etc., such description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying that relative importance may implicitly indicate the number of technical features indicated, whereby the feature defined as "first", "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solution combination is contradictory or cannot be realized, the technical solution combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 11, a foldable afternoon nap chair according to an embodiment of the present invention includes a support main body 200, a seat cushion 300, a backrest 400, and a rotation locking mechanism 100. The seat cushion 300 is horizontally and fixedly arranged above the supporting body 200. The backrest 400 is rotatably coupled to one end, i.e., the right end as viewed in fig. 1, of the seat cushion 300. The rotation locking mechanism 100 is connected between the support main 200 or the seat cushion 300 and the backrest 400, and the rotation locking mechanism 100 includes a locking mechanism assembly and a rotary member 2. The locking mechanism assembly is installed on the support main body 200 or the seat cushion 300 (in the embodiment of the present invention, it is preferable that the locking mechanism assembly is installed on the support main body 200), the rotary member 2 is connected to the backrest 400, and the rotary member 2 has a locking state fixed relative to the locking mechanism assembly and an unlocking state rotationally relative to the locking mechanism assembly. In the unlocked state, the backrest 400 can follow the rotation of the rotary member 2 with respect to the support body 200 to change an angle with the seat cushion 300. Thereby realizing the rotation adjustment of the backrest 400, solving the problem of the student during the afternoon nap and leading the afternoon nap of the student to be easy and comfortable. The backrest 400 is rotated by rotating the locking mechanism, so that students can lie for afternoon nap and can use the chair as a normal chair for class in the rest time.

As shown in fig. 2 to 5, the locking mechanism assembly includes a housing member 1, two slide members, a driving member 3 and an elastic member 5. As shown in fig. 4, the housing member 1 includes a housing 11 and two rotation-fitting portions 12. The housing 11 is composed of an upper housing and a lower housing which are mutually covered and fixed by a fastener (not shown), such as a screw or a pin, the first housing is an upper cover 112 in the embodiment, the second housing is a bottom shell 111, the bottom shell 111 is provided with an installation cavity 10 and an opening at the top of the installation cavity 10, two sliding members and an elastic member 5 are both installed in the installation cavity 10 in the bottom shell 111, the driving member 3 is installed between the bottom shell 111 and the upper cover 112 and is positioned by a first avoiding hole 1121 formed in the middle of the upper cover 112, and the upper cover 112 covers the opening of the installation cavity 10. The operating portion 31 at the top of the driving member 3 can move into and out of the first avoiding hole 1121. The driving member 3 includes an operation portion 31 and a driving portion 32, the driving portion 32 is a bottom end portion of the driving member 31 and has two symmetrical and spaced first inclined surfaces 321, a moving space is formed between the two first inclined surfaces 321, the elastic member 5 is transversely placed in the installation cavity 10 in the bottom case 111 and located right below the moving space of the driving member 2, left and right ends of the elastic member 5 respectively abut against the two sliding members and apply a biasing force for moving away from each other to the two sliding members, and second inclined surfaces 42 in movable contact with the two first inclined surfaces 321 are respectively formed on end portions of the two sliding members away from each other. The left end and the right end of the bottom shell 111 are respectively provided with a disc-shaped rotary matching part 12, each rotary matching part 12 is provided with a second avoiding hole 123 which is axially communicated, the outer end parts of the two sliding parts can enter and exit from the corresponding second avoiding holes 123, and in order to realize the connection between the bottom shell 111 and an external component such as a cushion of a chair, the outer peripheral surface of the bottom shell 111 is provided with a first connecting part 121. The two rotating members 2 are respectively and rotatably fitted at the outer sides of the two rotation fitting portions 12, and a locking portion is provided on the end surface of the two rotating members 2, specifically, the end surface of the two rotating members is fitted with the rotation fitting portion 12, and in order to connect the rotating members 2 to an external member such as a backrest of a chair, a second connecting portion 21 is provided on the outer circumferential surface of each rotating member 2. When the two sliding parts are in the initial state, the two sliding parts move outwards towards the two ends under the action of the elastic part 5, penetrate through the second avoidance holes 123 on the corresponding rotating matching parts 12 and are matched with the corresponding locking parts on the rotating part 2, so that the rotating part 2 and the outer shell part 1 are locked and fixed. When the rotating member 2 needs to be rotated, the rotating member 2 and the shell member 1 need to be unlocked, and the unlocking process is as follows: the driving member 3 is pressed downward, due to the action of the first inclined surface 321 and the second inclined surface 42, the two sliding members extrude the elastic member 5 to move close to each other to drive the end portions of the two sliding members, which are matched with the locking portions of the two rotating members 2, to exit from the respective locking portions, so that the rotating members 2 can rotate freely, the rotating members can be rotated clockwise according to a preset direction, such as shown in fig. 2, 7 and 9, when a required rotation angle is reached, the driving member is released, and the two sliding members extend out of the respective corresponding second avoiding holes 123 again under the action of the biasing force of the elastic member 5 and are matched with the respective locking portions on the corresponding rotating members 2 to realize locking and fixing. Simple structure, can realize the rotation control of chair back. As an alternative embodiment, the first housing is a top housing and has a mounting cavity therein, the mounting cavity has an open bottom, the second housing is a bottom housing and has a first avoiding hole formed in the middle thereof, the sliding member and the elastic member are mounted in the first housing, and the driving member is mounted between the first housing and the second housing and is positioned by the first avoiding hole in the bottom housing. When needing the unblock, upwards press the driving piece and can realize the unblock, the course of work is unanimous with the aforesaid, no longer gives unnecessary details.

According to some preferred embodiments of the present invention, one of the mutually fitting surfaces of any rotating member 2 and corresponding rotating fitting portion 12 is provided with a boss limiting portion 22, and the other of the mutually fitting surfaces of any rotating member 2 and corresponding rotating fitting portion 12 is provided with a groove limiting portion 122 fitted with the boss limiting portion 22. As shown in fig. 4, the outer end surface of the rotation fitting portion 12 is provided with a fan-shaped groove limiting portion 122, and correspondingly, the inner end surface of the rotating member 2 is provided with a block-shaped boss limiting portion 22. The rotary piece 2 has an initial position, a first position and a second position with respect to the respective rotary engagement portion 12. Specifically, as shown in fig. 4, two lock portions are provided on the inner end surface of each rotary member 2 at intervals of, for example, 30 ° in the circumferential direction. For convenience of description and distinction, one of them is described as the first latch portion 23, and the other is described as the second latch portion 24. In the initial position, i.e. as shown in fig. 2, the ends of the two sliding members remote from the elastic member 5 are engaged with one of the locking portions, specifically the first locking portion 23, of the corresponding rotating member 2, and the first connecting portion 121 and the second connecting portion 21 form a first included angle α, as shown in fig. 2, which is smaller than 180 °, and in this angular position, as shown in fig. 1, the seat cushion and the backrest form an angle of substantially 90 °. In the first position, as shown in fig. 7, the ends of the two sliding members far away from the elastic member 5 are engaged with the other locking portion, i.e. the second locking portion 24, of the corresponding rotating member 2, and the first connecting portion 121 and the second connecting portion 21 form a second included angle β larger than the first included angle α, as shown in fig. 7, the second included angle β is about 180 °, and in this position, as shown in fig. 6, the included angle between the seat cushion and the backrest is 90 ° -180 °, so that the user can lie half. In the second position, the ends of the two sliding members far away from the elastic member 5 are not engaged with any corresponding locking portions on the rotating member 2, one side wall of the boss limiting portion 22 is in contact with one side wall of the groove limiting portion 122 for limiting, the first connecting portion 121 and the second connecting portion 21 form a third included angle γ which is larger than the second included angle β, as shown in fig. 9, the third included angle γ is larger than 180 °, and in this angle position, as shown in fig. 8, the seat cushion and the backrest are close to the horizontal state but still smaller than 180 °, so that the user can take a comfortable lying posture. The embodiment of the utility model provides an in, locking portion is the pinhole, and is interchangeable, and locking portion also can be ordinary groove structure. As an alternative embodiment, the number of the locking parts may be other numbers, such as three, four, etc., and one skilled in the art can select the design according to the implementation requirement. Similarly, the included angle between adjacent locking portions may be other angles, such as 45 ° or the like.

According to some embodiments of the invention, a track is further provided in the housing member in sliding engagement with the two sliding members. As shown in fig. 5, two spaced rails 1111 are disposed at the inner bottom of the second casing, that is, the bottom casing 111, and two ends of the two rails 1111 are connected to the inner end surfaces of the rotation matching parts 12 at two ends of the second casing, and a limit rail 1112 is disposed between the two rails 1111 at a position close to the inner end surface of any one rotation matching part 12 to prevent the slider from colliding with the inner end surface of the rotation matching part 12. The setting of track 1111 can be guided the slip of slider, guarantees the gliding straightness accuracy of slider.

According to some embodiments of the present invention, the positioning columns 7 extending vertically are distributed around one of the first casing or the second casing, and the positioning holes (not shown) corresponding to the positioning columns 7 are distributed around the other of the first casing or the second casing. The first and second housings are fitted together by fasteners (not shown) such as screws or pins passing through the locating holes and locating posts 7. As shown in fig. 3 and 5, four positioning columns 7 extending vertically are distributed around the inner end of the second casing, that is, the bottom casing 111, each positioning column 7 is provided with a connecting hole, correspondingly, as shown in fig. 4, connecting columns (not shown) corresponding to the four positioning columns 7 and extending vertically are also distributed around the first casing, that is, the upper cover 112, and each connecting column is provided with a positioning hole, and the upper cover 112 and the bottom casing 111 are fixedly penetrated in the positioning columns 7 and the positioning holes through fasteners, such as screws or pins, and are matched together.

According to some embodiments of the present invention, as shown in fig. 4, any one of the sliding members includes a sliding block 4 and a movable pin 41, and both ends of the elastic member 5 are connected to the sliding blocks 4 of the two sliding members respectively. The movable pin 41 is provided at one end of the corresponding slider 4 remote from the elastic member 5 and is inserted into the locking portion of the corresponding rotary member 2 in the locked state. A second inclined surface 42 is formed at an end of the slider 4 remote from the elastic member 5. Optionally, the slider 4 and the movable pin 41 of either slide are of integral construction or of separate design, such as a threaded connection. As an alternative embodiment, the sliding element may also comprise only the sliding block 4, and an outwardly protruding stud may be provided at the outer end of the sliding block 4, i.e. the end provided with the second inclined surface 42, for engagement with the locking portion.

According to some embodiments of the present invention, the driving end of the driving portion 32, which is far away from the operating portion 31, is formed with a recess 322 in the shape of an isosceles right trapezoid having an opening length greater than the bottom end length, the two side walls of the recess 322 are respectively formed with a first inclined plane 321, and the recess 322 is formed as a movable space for the sliding of the slider 4 of the two sliding members. That is, as shown in fig. 4, the driving portion 32 of the driving member 3 is shaped like a bald cover "" in which the left and right inner side walls are inclined outward. The operating portion 31 of the driving member 3 is an elliptical cylinder, and correspondingly, the first avoiding hole 1121 of the upper cover 112 is elliptical.

According to the utility model discloses a some embodiments, the middle part of arbitrary rotating member 2 has seted up first axle portion 25 and first axle portion 25 along its axial and has opened first axle hole 251, the middle part of corresponding rotatory cooperation portion 12 is seted up along its axial extension and has opened second axle hole (not shown) with first axle portion 25 coaxial complex second axle portion 124 and second axle portion 124, rotating member 2 and corresponding rotatory cooperation portion 12 pass through round pin axle 6 to be fixed in first axle hole 251 and second axle downthehole and rotate the cooperation and be in the same place. As shown in fig. 4, a second shaft portion 124 extending axially and outwardly is provided at the middle of each rotation fitting portion 12 of the housing member 1, and a second shaft hole is provided at the middle of each second shaft portion 124. The middle part of the end face, namely the inner end face, of each rotating member 2, which is matched with the rotating matching part 12, is provided with a first shaft part 25 extending outwards in the axial direction, each first shaft part 25 is provided with a first shaft hole 251, and the rotating member 2 can rotate circumferentially around the axis of the pin shaft 6, namely the axis of the first shaft hole 251 or the second shaft hole, relative to the rotating matching part 12 or the casing member 1 in an unlocking state through the pin shaft 6 penetrating through the first shaft hole 251 and the second shaft hole. As shown in fig. 4, the boss stopper portion 22 is connected to the outer peripheral wall of the first shaft portion 25 and extends radially outward from the outer peripheral wall of the first shaft portion 25 to the outer peripheral edge of the rotary member 2.

According to some embodiments of the present invention, the first connection portion 121 and the second connection portion 21 are connection blocks or connection columns. As shown in fig. 1, 6 and 8, the second connecting portion 21 may be integrally formed with a connecting rod at the rear end of the backrest 400.

According to some embodiments of the present invention, as shown in fig. 1, fig. 6, fig. 8 and fig. 10 to fig. 11, the foldable afternoon nap chair of the present invention further comprises a shelf 500, wherein the shelf 500 is installed at the bottom of the seat cushion 300. Specifically, as shown in fig. 8, one end of the article placing shelf 500 is rotatably connected to one end of the supporting top 210 of the supporting body 200, which is away from the backrest 400, for supporting the seat cushion 300, that is, the left end of the supporting top 210 shown in fig. 8, and the other end of the article placing shelf 500 is a free end and can be dragged by the U-shaped suspension rod 520 fixed to one end of the supporting top 210, which is close to the backrest 400, in the initial position. More specifically, as shown in fig. 10 and 11, in the initial position, one end of the article placing rack 500 close to the backrest 400, that is, two sides of the top of the left end of the article placing rack 500 shown in fig. 8, are respectively provided with a second engaging groove 505, and the second engaging groove 505 can be engaged by the U-shaped hanging rod 520, so as to prevent the article placing rack 500 from sliding, and improve the stability of the article placing rack 500. As shown in fig. 10, two U-shaped first engaging grooves 504 are formed at one end of the article placing rack 500 away from the backrest 400, that is, the left end of the article placing rack 500 shown in fig. 10 and 11, the left end of the article placing rack 500 is rotatably connected with the supporting top 210 through a U-shaped rotating rod 510, a horizontally arranged hollow rotating shaft 503 is arranged on the inner wall of the article placing rack 500, and the bottom of the rotating rod 510 is rotatably fitted in the hollow rotating shaft 503, so that in the first position and the second position, the article placing rack 500 is turned over around the rotating rod 510 and is fixed in a state that the bottom faces upwards by being engaged in the first engaging grooves 503 through the rotating rod 510, thereby realizing that the article placing rack 500 is used as an article holding device in the initial position, and in the first position or the second position, the foot of a user can be placed, and the comfort of the legs during use is improved. Because the rotating rod 510 and the hollow rotating shaft 503 are in a rotating connection state, the included angle between the article placing rack 500 and the seat cushion 300 can be adjusted according to the requirement. In some embodiments, the shelf 500 is retractable along its length. As shown in fig. 8 and 10, the shelf 500 includes a shelf body 501 and a sliding shelf 502 slidably fitted on the shelf body 501, for example, the sliding shelf 502 is fitted with the shelf body 501 by a sliding block and sliding rail manner or a sliding block and sliding groove manner, etc. As shown in fig. 1, fig. 6 and fig. 8, in the embodiment of the present invention, it is preferable that the sliding grooves 506 are formed on two side walls of the rack body 501, and correspondingly, the sliding blocks (not shown) slidably engaged with the sliding grooves 506 are disposed on two side walls of the sliding rack 502. So design, can make things convenient for the user to adjust the length of supporter 500 according to its self leg length, make things convenient for the user of leg length also can all be taken on supporter 500 when lying and sleeping, travelling comfort when improving the use.

According to some embodiments of the present invention, as shown in fig. 8, the support body 200 includes a bottom support frame, a top support frame, and a middle vertical connection frame. The top support frame is a U-shaped support top 210, the rotating rod 510 is rotatably connected to the top support frame, the seat cushion 300 is fixed to the support top 210, and the locking mechanism assembly is fixed to the right end of the support top 210. In alternative embodiments, the locking mechanism assembly may also be secured to the seat cushion 300. In some embodiments, the middle vertical connecting frame of the supporting main body 200 is liftable, a lifting rocking handle for lifting by a controller is arranged at the bottom of the middle vertical connecting frame, the specific structure of the liftable vertical connecting frame is not particularly described or limited, and the liftable vertical connecting frame is a conventional lifting frame structure in the prior art, for example, a gear rack lifting structure is arranged inside the vertical connecting frame.

According to some embodiments of the present invention, the rotation locking mechanism 100 is not limited to the rotation control of the chair back 400, but may be used between two connecting members that need to rotate relative to each other and lock in place when not rotating, as is well known to those skilled in the art or others.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (10)

1. A folding afternoon nap chair is characterized by comprising:

a support body;

the cushion is horizontally and fixedly arranged above the supporting main body;

the backrest is rotatably connected to one end of the seat cushion;

a rotary lock mechanism connected between the seat cushion and the backrest, the rotary lock mechanism including a lock mechanism assembly mounted on the support body and a rotary member connected to the backrest, the rotary member having a locked state fixed relative to the lock mechanism assembly and an unlocked state rotationally relative to the lock mechanism assembly;

when the backrest is in the unlocking state, the backrest can rotate relative to the support main body along with the rotating piece so as to change an included angle between the backrest and the seat cushion.

2. The folding afternoon nap of claim 1, wherein the locking mechanism assembly comprises:

a housing member having a mounting cavity therein;

the two sliding parts are arranged in the mounting cavity of the shell part in a relatively sliding manner;

the driving piece can be movably arranged in the mounting cavity of the outer shell piece along the sliding direction vertical to the two sliding pieces and is used for driving the two sliding pieces to move relatively close to each other;

an elastic member provided between the two sliding members and applying a biasing force in a direction away from each other to the two sliding members;

the driving part is provided with a driving part and an operating part, two first inclined planes which are symmetrical and arranged at intervals are formed on the driving part, and second inclined planes which are in one-to-one correspondence with the two first inclined planes and are in movable contact with the two first inclined planes are respectively formed on the end surfaces, far away from the elastic part, of the two sliding parts;

a first avoidance hole for the operating part to enter and exit is formed in the outer shell part, disc-shaped rotary matching parts are formed at two ends of the outer shell part respectively, a second avoidance hole which is axially communicated with any one of the rotary matching parts and is used for the corresponding sliding part to enter and exit at the end part, far away from the elastic part, of the sliding part is formed in any one of the rotary matching parts, and a first connecting part connected with the cushion or the support main body is formed on the outer peripheral surface of any one of the rotary matching parts;

the two rotating pieces are in one-to-one corresponding rotating fit on the two rotating fit parts, at least two locking parts are arranged on the end face, matched with the corresponding rotating fit part, of any one rotating piece at intervals along the circumferential direction, and a second connecting part connected with the backrest is formed on the outer circumferential surface of any one rotating piece;

the driving piece drives the two sliding pieces to move close to each other under the action of external force so as to enable the rotating piece and the shell piece to be switched from a locking state to an unlocking state; after the external force is released, the two sliding pieces are driven by the elastic piece to move away from each other and selectively cooperate with one of the locking parts on the corresponding rotating piece, so that the seat cushion connected with the first connecting part and the backrest connected with the second connecting part are switched to a locking state of a required angle position.

3. The folding afternoon nap chair according to claim 2, wherein one of the mutually fitting surfaces of any one of the rotating pieces and the corresponding rotating fitting portion is provided with a boss limiting portion, and the other of the mutually fitting surfaces of any one of the rotating pieces and the corresponding rotating fitting portion is provided with a groove limiting portion fitted with the boss limiting portion;

the rotating pieces have an initial position, a first position and a second position relative to the rotating fitting parts corresponding to the rotating pieces respectively;

in the initial position, the end parts of the two sliding parts far away from the elastic part are matched with one locking part on the corresponding rotating part, and the first connecting part and the second connecting part form a first included angle;

when the sliding piece is in the first position, the end parts, far away from the elastic piece, of the two sliding pieces are matched with the other locking part on the corresponding rotating piece, and the first connecting part and the second connecting part form a second included angle which is larger than the first included angle;

when the second position, two keeping away from of slider the tip of elastic component does not with corresponding any locking portion cooperation on the rotating member just the lateral wall of the spacing portion of boss with the lateral wall contact of the spacing portion of recess is spacing, first connecting portion with the second connecting portion become to be greater than the third contained angle of second contained angle.

4. A foldable afternoon nap according to claim 2, characterised in that said housing elements have inside them rails slidingly engaged with two of said sliding elements.

5. The folding afternoon nap according to claim 2, wherein each of the sliding members comprises a sliding block and a movable pin, and both ends of the elastic member are respectively connected to the sliding blocks of the two sliding members;

the movable pin is arranged at one end, far away from the elastic piece, of the corresponding sliding block and is inserted into the locking part on the corresponding rotating piece in the locking state;

the second inclined surface is formed at one end of the sliding block far away from the elastic piece.

6. The folding afternoon nap according to any one of claims 3-5, further comprising:

the supporter is arranged at the bottom of the cushion.

7. The folding afternoon nap of claim 6, wherein the shelf is retractable along its length.

8. The foldable afternoon nap chair of claim 6, wherein one end of the rack is rotatably connected to an end of the supporting top of the supporting body for supporting the seat cushion, the end being away from the backrest, and the other end of the rack is a free end and can be dragged by a U-shaped suspension rod fixed to the supporting top at an end thereof close to the backrest when in an initial position.

9. The folding afternoon nap chair according to claim 8, wherein a horizontal hollow rotating shaft is arranged on the inner wall of one end of the storage rack, which is far away from the backrest, a U-shaped rotating rod is connected in the hollow rotating shaft in a rotating manner, and the storage rack is connected with the top of the support in a rotating manner through the U-shaped rotating rod;

two first clamping grooves are formed in one end, far away from the backrest, of the storage rack at an initial position at intervals;

when the first position with during the second position, the supporter winds behind the bull stick upset and through the bull stick joint is in the first draw-in groove and fix the state that the bottom surface is up.

10. The foldable afternoon nap chair according to claim 8, wherein a second slot is provided at a bottom of an end of the rack near the backrest in the initial position for the hanging rod to engage with.

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