CN217658836U

CN217658836U - Folding chair

Info

Publication number: CN217658836U
Application number: CN202221124894.1U
Authority: CN
Inventors: 石运华
Original assignee: Zhongshan Kangxing Medical Instrument Co ltd
Current assignee: Zhongshan Kangxing Medical Instrument Co ltd
Priority date: 2022-05-11
Filing date: 2022-05-11
Publication date: 2022-10-28
Anticipated expiration: 2032-05-11

Abstract

The utility model discloses a folding chair relates to folding chair technical field. Including seat board, two preceding stay tubes, two back stay tubes and positioning mechanism, the top of every back stay tube is articulated with the upper portion on a preceding stay tube surface respectively, and horizontal fixedly connected with takes over the pipe between two preceding stay tubes, fixedly connected with rotating tube between two back stay tubes, and the rear end of seat board bottom rotates to be connected in the surface of rotating tube, and the location includes the installation piece of fixed connection in seat board lower surface middle part, rotates on the installation piece to be connected with the connecting strip. This folding chair, through setting up positioning mechanism, after this folding chair is folding, the inside of draw-in groove can be gone into to the card ball in the registration arm, under card ball and draw-in groove interact, the current rigidity of connecting strip is lived to make the connecting block and the position of taking over the pipe fixed, prevent that folding chair from expandeing automatically, played the effect of location, thereby improved this folding chair's practicality.

Description

Folding chair

Technical Field

The utility model relates to a folding chair technical field, in particular to folding chair.

Background

The folding chair is a portable chair with a folding function, is convenient to move and saves space. The training aid is initially used for military purposes and is commonly used in places such as various training institutions, schools at all levels, public places, hospitals, restaurants, hotels, companies, families and the like.

The folding chair on the market is diversified, and the folding chair of the majority can become a longer and thinner frame after folding, is convenient for accomodate it, but ordinary folding chair is after folding, owing to not setting up fixed establishment, automatic expansion easily, and is more inconvenient.

Therefore, how to realize the folding chair and how to prevent the folding chair from automatically unfolding after being folded is an urgent technical problem to be solved in the industry.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a folding chair, which aims to solve the problem that the folding chair can be automatically unfolded after being folded.

The utility model provides a folding chair, which comprises a seat plate, two front supporting tubes, two rear supporting tubes and a positioning mechanism, wherein the top end of each rear supporting tube is respectively hinged with the upper part of the surface of one front supporting tube, a lapping tube is transversely and fixedly connected between the two front supporting tubes, a rotating tube is fixedly connected between the two rear supporting tubes, and the rear end of the bottom of the seat plate is rotatably connected with the surface of the rotating tube;

the location includes the installation piece of fixed connection in seat board lower surface middle part, it is connected with the connecting strip to rotate on the installation piece, the fixed surface who takes over is connected with the connecting block, the bottom of connecting block with the other end of connecting strip rotates to be connected, the installation piece is located two edges are seted up on the surface of connecting strip one side the draw-in groove of the mutual symmetry of central line on the installation piece width direction, the inboard fixed surface of connecting strip is connected with the registration arm, the inside of registration arm is provided with the spring, the other end fixedly connected with of spring with the card ball of draw-in groove adaptation, when the seat board expandes to the horizontality, the bottom of seat board with the overlap joint pipe laminating, the card ball card inlays to the front end in the draw-in groove, when the seat board is packed up, the seat board with the separation of overlap joint pipe, the card ball card inlays to the rear end inside the draw-in groove.

Preferably, the mounting groove has transversely been seted up at the rear portion of pendulum Europe and America under the seat board, the inside fixedly connected with swivel becket of mounting groove, the swivel becket pass through the swivel becket rotate connect in the bottom of mounting groove, the front portion of seat board lower surface transversely seted up with the overlap joint groove of overlap joint pipe looks adaptation.

Preferably, the inside of registration arm is provided with the internal thread, the inside of registration arm passes through female connection of screw thread has the threaded rod, spring fixed connection in the inner of threaded rod, the outer end of threaded rod extends to the outside of registration arm, the surface of threaded rod just is located the outside fixedly connected with plectrum of registration arm.

Preferably, two fixedly connected with backup plate between the top of preceding supporting tube, two the surface of preceding supporting tube just is located the backup plate with all rotate between the installation cover and be connected with the handrail.

Preferably, the top ends of the rear supporting tubes are rotatably connected with mounting sleeves, and the front supporting tubes are hinged to the top ends of the two rear supporting tubes through the mounting sleeves respectively.

Preferably, two between the preceding stay tube and being located the below fixedly connected with reinforcement pipe of overlap joint pipe, two the back stay tube with two the equal fixedly connected with spacer in bottom of preceding stay tube.

The utility model discloses, through setting up positioning mechanism, after this folding chair is folding, two connecting blocks on the overlap joint pipe drive the connecting strip and rotate, after the connecting strip rotates certain angle, the position of registration arm motion to the draw-in groove on two connecting strips, the inside of draw-in groove is gone into to the card ball in two registration arms under the effect of spring this moment, the card ball this moment and draw-in groove interact, live the current rigidity of connecting strip, thereby make the connecting block fixed with the position of taking over the pipe, thereby prevent that the folding chair from unfolding automatically, the effect of location has been played, thereby the practicality of this folding chair has been improved.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of the structure of the middle and rear supporting tubes and the front supporting tube of the present invention;

FIG. 3 is a schematic view of the structure of the mounting plate and the connecting strip of the present invention;

fig. 4 is a schematic view of the structure of the middle positioning mechanism of the present invention.

In the figure: 1. a seat plate; 2. mounting grooves; 3. rotating the tube; 4. a rear support tube; 5. installing a sleeve; 6. a front support tube; 7. c, overlapping the pipes; 8. a lap joint groove; 9. mounting a sheet; 10. a connecting strip; 11. connecting blocks; 12. a card slot; 13. a positioning tube; 14. an internal thread; 15. a threaded rod; 16. a spring; 17. blocking the ball; 18. a shifting sheet; 19. reinforcing the pipe; 20. a handrail; 21. a backup plate; 22. supporting the cushion block; 23. a cushion.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-4, an embodiment of the present invention is provided, which comprises a seat plate 1, two front supporting tubes 6, two rear supporting tubes 4 and a positioning mechanism, wherein the top end of each rear supporting tube 4 is hinged to the upper portion of the surface of one front supporting tube 6, a transverse fixedly connected overlapping tube 7 is arranged between the two front supporting tubes 6, a rotating tube 3 is fixedly connected between the two rear supporting tubes 4, and the rear end of the bottom of the seat plate 1 is rotatably connected to the surface of the rotating tube 3.

Two back stay tubes 4 and two front stay tubes 6 play a supporting role, and when this seat expandes, lie in back stay tube 4 and front stay tube 6 and ground three with one side and form a triangle-shaped, the triangle-shaped structure is comparatively firm, has guaranteed this folding chair's stability.

The location includes fixed connection in the installation piece 9 at 1 lower surface middle part of seat plate, it is connected with connecting strip 10 to rotate on the installation piece 9, the fixed surface of overlap joint pipe 7 is connected with connecting block 11, the bottom of connecting block 11 rotates with the other end of connecting strip 10 to be connected, installation piece 9 is located the surface of connecting strip 10 one side and sets up two draw-in grooves 12 along the mutual symmetry of the last central line of installation piece 9 width direction, the inboard fixed surface of connecting strip 10 is connected with registration arm 13, the inside of registration arm 13 is provided with spring 16, spring 16's the other end fixedly connected with and the card ball 17 of draw-in groove 12 adaptation.

When the seat plate 1 is unfolded to the horizontal state, the bottom of the seat plate 1 is attached to the lap joint pipe 7, the clamping ball 17 is clamped and embedded in the clamping groove 12 at the front end, when the seat plate 1 is folded, the seat plate 1 is separated from the lap joint pipe 7, and the clamping ball 17 is clamped and embedded in the clamping groove 12 at the rear end.

Mounting groove 2 has transversely been seted up at the rear portion of 1 lower hem Europe and America of seat board, the inside fixedly connected with swivel becket of mounting groove 2, and swivel becket 3 rotates through the swivel becket to be connected in the bottom of mounting groove 2, and the overlap joint groove 8 with 7 looks adaptations of overlap joint pipe is transversely seted up to the front portion of 1 lower surface of seat board.

An internal thread 14 is arranged inside the positioning tube 13, a threaded rod 15 is connected inside the positioning tube 13 through the internal thread 14 in a threaded mode, a spring 16 is fixedly connected to the inner end of the threaded rod 15, and the outer end of the threaded rod 15 extends to the outside of the positioning tube 13.

In the process that this folding chair is folded up, the front end of seat board 1 lifts up, in the process that seat board 1 lifts up, overlap joint pipe 7 produces relative motion rather than it, two connecting blocks 11 on overlap joint pipe 7 surface drive two connecting strips 10 and use mounting sheet 9 to rotate to the rear portion of seat board 1 as the center, in the pivoted process, the registration arm 13 on two connecting strips 10 can rotate the draw-in groove 12 position on two mounting sheets 9 respectively, the inside card ball 17 of registration arm 13 is impressed the inside of draw-in groove 12 under the effect of spring 16 this moment, card ball 17 forms limiting displacement when draw-in groove 12 is inside, the rigidity of connecting strip 10, thereby make the position of overlap joint pipe 7 fixed, the effect of location has been played, prevent this folding chair from unfolding automatically.

The accessible rotates 15 adjusting screw rod 15 inner positions of threaded rod, and is closer with the distance of installation piece 9 when threaded rod 15 is inner, and the locking effect of card ball 17 when going into draw-in groove 12 is just tighter, and the location effect is just better, nevertheless will be more strenuous when expanding the folding chair simultaneously, otherwise then can be laborsaving, but the effect of locking can be weakened, and people can adjust the positioning mechanism's of locking effect according to self condition.

When the folding chair is unfolded, the clamping ball 17 slides into the positioning tube 13 under the action of external force, the chair can be unfolded, and after the chair is completely unfolded, the clamping ball 17 can be clamped into the other clamping groove 12 to position the chair.

The inner diameter of the lap joint groove 8 is matched with the outer diameter of the lap joint pipe 7, and the lap joint groove and the lap joint pipe are clamped when the chair is unfolded, so that the seat plate 1 is kept in a horizontal state.

A shifting sheet 18 is fixedly connected to the outer surface of the threaded rod 15 and positioned outside the positioning tube 13.

The shifting piece 18 facilitates the people to rotate the threaded rod 15.

A backup plate 21 is fixedly connected between the tops of the two front supporting tubes 6, and handrails 20 are rotatably connected on the surfaces of the two front supporting tubes 6 and between the backup plate 21 and the mounting sleeve 5.

The back plate 21 acts as a seat back and the armrest 20 also acts as the armrest 20 of a normal seat.

The top of two back stay tubes 4 all rotates and is connected with installation cover 5, and two front stay tubes 6 articulate respectively in the top of two back stay tubes 4 through two installation covers 5 respectively.

A reinforcing pipe 19 is fixedly connected between the two front support pipes 6 and below the overlap pipe 7.

The mounting sleeve 5 plays a role in connection, and the reinforcing pipe 19 can reinforce the connection strength between the two front support pipes 6, so that the stability of the whole seat is improved.

The bottom ends of the two rear supporting tubes 4 and the two front supporting tubes 6 are fixedly connected with supporting cushion blocks 22, and a cushion 23 is arranged on the upper surface of the seat plate 1.

The back cushion 22 provides support while preventing wear on the bottom of the back and

front support tubes

4, 6, and the seat cushion 23 promotes comfort when a person sits on the chair.

When the folding chair works, in the process that the folding chair is folded, the front end of the seat plate 1 is lifted upwards, in the process that the seat plate 1 is lifted upwards, the lap joint pipe 7 moves relative to the lap joint pipe, the two connecting blocks 11 on the surface of the lap joint pipe 7 drive the two connecting strips 10 to rotate towards the rear part of the seat plate 1 by taking the mounting sheets 9 as centers, in the rotating process, the positioning pipes 13 on the two connecting strips 10 can respectively rotate to the positions of the clamping grooves 12 on the two mounting sheets 9, at the moment, the clamping balls 17 in the positioning pipes 13 are pressed into the clamping grooves 12 under the action of the springs 16, the clamping balls 17 form a limiting effect when being inside the clamping grooves 12, the positions of the connecting strips 10 are fixed, so that the positions of the lap joint pipes 7 are fixed, the positioning effect is achieved, and the folding chair is prevented from automatically unfolding.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structural changes made by the contents of the specification and the drawings, or the direct or indirect application in other related technical fields, are included in the same way in the protection scope of the present invention.

Claims

1. A folding chair is characterized by comprising a seat plate, two front supporting tubes, two rear supporting tubes and a positioning mechanism, wherein the top end of each rear supporting tube is hinged to the upper part of the surface of one front supporting tube, a lapping tube is transversely and fixedly connected between the two front supporting tubes, a rotating tube is fixedly connected between the two rear supporting tubes, and the rear end of the bottom of the seat plate is rotatably connected to the surface of the rotating tube;

the positioning device comprises a mounting piece fixedly connected to the middle of the lower surface of a seat plate, a connecting strip is rotatably connected to the mounting piece, a connecting block is fixedly connected to the surface of the lapping pipe, the bottom end of the connecting block is rotatably connected with the other end of the connecting strip, and two clamping grooves which are mutually symmetrical along the central line in the width direction of the mounting piece are formed in the surface of the mounting piece on one side of the connecting strip;

the inner side surface of the connecting strip is fixedly connected with a positioning tube, a spring is arranged in the positioning tube, and the other end of the spring is fixedly connected with a clamping ball matched with the clamping groove;

when the seat plate is unfolded to the horizontal state, the bottom of the seat plate is attached to the lap joint pipe, the clamping ball is clamped and embedded in the clamping groove at the front end, when the seat plate is folded, the seat plate is separated from the lap joint pipe, and the clamping ball is clamped and embedded in the clamping groove at the rear end.

2. The folding chair as claimed in claim 1, wherein a mounting groove is transversely formed at the rear part of the lower hem of the seat plate in Europe and America, a rotating ring is fixedly connected inside the mounting groove, the rotating tube is rotatably connected to the bottom end of the mounting groove through the rotating ring, and an overlapping groove matched with the overlapping tube is transversely formed at the front part of the lower surface of the seat plate.

3. The folding chair as claimed in claim 1, wherein an internal thread is provided inside the positioning tube, a threaded rod is connected inside the positioning tube through the internal thread, the spring is fixedly connected to the inner end of the threaded rod, the outer end of the threaded rod extends to the outside of the positioning tube, and a plectrum is fixedly connected to the outside of the positioning tube and located on the outer surface of the threaded rod.

4. The folding chair as claimed in claim 1, wherein the top ends of the two rear supporting tubes are rotatably connected with mounting sleeves, the two front supporting tubes are respectively hinged to the top ends of the two rear supporting tubes through the two mounting sleeves, a back plate is fixedly connected between the top portions of the two front supporting tubes, and armrests are rotatably connected between the back plate and the mounting sleeves on the surfaces of the two front supporting tubes.

5. The folding chair as claimed in claim 1, wherein a reinforcing tube is fixedly connected between the two front supporting tubes and below the lapping tube, and supporting pads are fixedly connected to the bottom ends of the two rear supporting tubes and the two front supporting tubes.