CN211380407U

CN211380407U - Seat with adjustable return speed

Info

Publication number: CN211380407U
Application number: CN201922320079.7U
Authority: CN
Inventors: 吴新云
Original assignee: Foshan Leadcom Seating Co ltd
Current assignee: Foshan Leadcom Seating Co ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-09-01
Anticipated expiration: 2029-12-20

Abstract

The utility model provides a chair with adjustable return speed, which comprises a base, a rotating plate, a chair back arranged on the base, a seat board fixedly connected on the rotating plate, a plate spring and a U-shaped rotating rod; two ends of the U-shaped rotating rod are respectively horizontally provided with a rotating part which can be rotatably arranged on the base; the rotating part is connected with the front end of the rotating plate; the base is provided with a screw positioned below the U-shaped rotating rod, the screw is in threaded connection with the middle part of the plate spring, the front side surface of the top of the plate spring is abutted against the U-shaped rotating rod, and the bottom of the plate spring is clamped with the base; the rear end of the rotating plate is provided with a limiting block, and the base is correspondingly provided with a limiting plate positioned below the chair back; when the seat board is in a use state, the limiting block abuts against the bottom surface of the limiting plate. The U-shaped rotating rod rotates under the action of the plate spring to drive the seat plate to automatically return to the original position, the elasticity of the plate spring is adjusted through the screw between the adjusting plate spring and the base, and then the speed of returning the seat plate to the original position is adjusted, so that the automatic return device has the advantages of practicality, reliability, stable return, adjustable speed and long service life.

Description

Seat with adjustable return speed

Technical Field

The utility model belongs to the technical field of the seat, concretely relates to speed adjustable seat returns.

Background

At present, in public places such as auditoriums, cinemas and the like, public seats arranged in a row are installed, seat cushions (or seat boards) of the public seats can be turned over, when a person sits on the seats, the seat cushions rotate to be in a horizontal state, and after the person leaves the seats, the seat cushions can automatically return to be in a retracted (or vertical) state. By the structural design, the occupied area of the seat is small, and the available space of public places is expanded, so that people can pass through the seat conveniently.

In the conventional seat structure, the seat cushion is often restored by a spring elastic structure, and there may be disadvantages as follows: the spring returns to gradually lose efficacy with overlong use time; the noise is larger in the recovery process. Of course, some parts such as a torsion spring and a gas spring are adopted, but the gas spring has a short service life and is easy to unbalance when the torsion spring returns. In addition, most importantly, the recovery speed of the seat cushion can not be adjusted, and in the using process, some seat cushions recover faster, and some seat cushions recover slower due to overlong using time and are not uniform enough.

It is seen that improvements and enhancements to the prior art are needed.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing prior art's weak point, the utility model aims to provide a reply speed adjustable seat aims at solving the nonadjustable problem of seat reply speed among the prior art, has practical reliable, reply steady, speed adjustable, longe-lived advantage.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a chair with adjustable return speed comprises a base, a rotating plate, a chair back arranged on the base and a seat plate fixedly connected to the rotating plate; it also comprises a plate spring and a U-shaped rotating rod;

two ends of the U-shaped rotating rod are respectively horizontally provided with a rotating part which can be rotatably arranged on the base;

the rotating part is fixedly connected with the front end of the rotating plate;

the base is provided with a screw positioned below the U-shaped rotating rod, the screw is in threaded connection with the middle of the plate spring, the front side face of the top of the plate spring is abutted against the U-shaped rotating rod, and the bottom of the plate spring is clamped with the base;

the rear end of the rotating plate is provided with a limiting block, and the base is correspondingly provided with a limiting plate positioned below the chair back; when the seat board is in a use state, the limiting block abuts against the bottom surface of the limiting plate.

In the seat with adjustable return speed, the top of the plate spring is provided with a hook part which is integrally formed, and the bottom surface of the hook part is abutted against the U-shaped rotating rod.

In the seat with adjustable return speed, the bottom of the plate spring is provided with a positioning block, and the base is correspondingly provided with a positioning hole suitable for inserting the positioning block.

In the seat with adjustable return speed, a rivet nut connected with a screw is fixedly arranged in the middle of the plate spring.

In the seat with the adjustable return speed, the rivet nut is a flat-head vertical-line rivet nut.

In the seat with adjustable return speed, the outer end of the rotating part is provided with a connecting part clamped with the rotating plate, and the rotating plate is correspondingly provided with a clamping hole suitable for inserting the connecting part.

In the seat with adjustable return speed, the base comprises a supporting seat and a bracket fixed on the supporting seat; from a left side view, the bracket is U-shaped; the limiting plate is fixedly connected to the front side of the rear end of the bracket; the front end of the bracket is provided with a mounting seat; the mounting seat is provided with a first opening suitable for the rotating part to be inserted and rotate.

In the seat with adjustable return speed, the front ends of the mounting seat and the bracket are U-shaped from the overlooking angle; from the upward view, the bottom of the mounting seat is provided with a U-shaped groove; the groove is internally provided with a positioning part, and the front end of the bracket is correspondingly provided with a positioning opening suitable for the insertion of the positioning part.

In the seat with the adjustable return speed, the positioning opening is U-shaped.

The seat with the adjustable return speed further comprises a plastic protective sleeve wrapping the top of the plate spring and the hook part.

Has the advantages that:

the utility model provides a reply speed adjustable seat has practical reliable, reply steady, speed adjustable, longe-lived advantage.

The utility model discloses set up U-shaped bull stick and leaf spring, the U-shaped bull stick rotates under leaf spring's effect, drives the automatic normal position that returns of bedplate, through the screw between regulating plate spring and the base, comes the elasticity of regulating plate spring, and then the speed of regulating bedplate normal position that returns.

Drawings

Fig. 1 is a perspective view of the chair with adjustable return speed provided by the present invention in a non-use state.

Fig. 2 is a perspective view of the chair with adjustable return speed in use according to the present invention.

Fig. 3 is a perspective view of the structure of the rotating plate connected to the bracket in the seat with adjustable return speed provided by the present invention.

Fig. 4 is a perspective view of the structure of the plate spring, the U-shaped rotating rod and the bracket connection in the seat with adjustable return speed provided by the present invention.

Fig. 5 is an explosion diagram of the structure of the seat with adjustable return speed, in which the plate spring, the U-shaped rotating rod and the mounting seat are connected.

Fig. 6 is a perspective view of the structure of the mounting seat and the bracket connection in the seat with adjustable return speed provided by the present invention.

Fig. 7 is a perspective view of the mounting seat in the seat with adjustable return speed provided by the present invention.

Fig. 8 is a left side view of the structure of the seat with adjustable return speed provided by the present invention in the use state.

Fig. 9 is a schematic view showing the operation of the plate spring, the rotating plate and the U-shaped rotating rod when the seat with adjustable return speed is in use.

Fig. 10 is a schematic view of the plate spring, the rotating plate and the U-shaped rotating rod when the seat with adjustable return speed of the present invention is not in use.

Detailed Description

The utility model provides a reply speed adjustable seat, for making the utility model discloses a purpose, technical scheme and effect are clearer, clear and definite, and it is right that the embodiment is lifted to follow with reference to the attached drawing the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 2, 5, 6 and 8, the present invention provides a chair with adjustable return speed, which comprises a base 9, a rotating plate 3, a chair back (not shown) disposed on the base 9, and a seat plate (not shown) fixedly connected to the rotating plate 3; it also comprises a leaf spring 6 and a U-turn lever 5.

As shown in fig. 5 and 8, the two ends of the U-shaped rotating rod 5 are horizontally provided with a rotating part 51 rotatably provided on the base 9. The rotating part 51 and the U-shaped rotating rod 5 are integrally formed, and the distance between the horizontal axis of the rotating part 51 and the horizontal axis of the U-shaped rotating rod is small, so that the shape of a vehicle transverse handle is presented.

As shown in fig. 5 and 8, the rotating part 51 is fixedly connected to the front end of the rotating plate 3, the seat plate can be mounted on the rotating plate 3 by bolts, and when the seat plate rotates, the rotating plate 3 rotates synchronously therewith, at which time the rotating part 51 and the U-shaped rotating rod 5 rotate together with the rotating plate 3.

As shown in fig. 3, 4, 5, 6, and 8, the base 9 is provided with a screw (not shown) located below the U-shaped rotating rod 5, the screw is connected to the middle of the plate spring 6 in a threaded manner, the front side of the top of the plate spring 6 abuts against the U-shaped rotating rod 5, and the bottom of the plate spring 6 is clamped with the base 9. Specifically, the bottom of the plate spring 6 is provided with a positioning block 62 integrally formed therewith, and the base 9 is correspondingly provided with a positioning hole 21 suitable for inserting the positioning block 62.

The plate spring 6 is clamped into the positioning hole 21 through the positioning block 62, and then the middle part of the plate spring 6 is connected by using a screw, while the top part of the plate spring 6 is abutted against the U-shaped rotating rod 5, as shown in fig. 10, when the plate spring 6 is not used, the plate spring 6 is in a natural (or non-deformed) state.

As shown in fig. 9, in the use state, the bottom of the plate spring 6 is acted by the base in the backward direction and does not swing forward, the middle of the plate spring is acted by the screw and does not move backward, however, the top of the plate spring is acted by the backward force due to the rotation of the U-shaped rotating rod and swings backward, and deformation occurs.

As shown in fig. 9 and 10, in the process of switching the seat plate from the non-use state to the use state, the U-shaped rotating rod 5 rotates clockwise around the axis of the rotating part 51 along with the rotating plate 3, the U-shaped rotating rod rotates forward from the inclined state to the inclined state, the U-shaped rotating rod 5 always abuts against the top front side surface of the leaf spring 6, and in the process, the leaf spring 6 is deformed by the pressure of the U-shaped rotating rod 5.

When a person leaves the seat board, the seat board automatically returns to the original position (or called as a vertical state) under the action of the self gravity and the plate spring. The leaf spring 6 applies a force to the U-turn lever 5 to return to a natural state, and pushes the U-turn lever 5 to rotate counterclockwise. In addition, through twisting the screw into, back out, the distance between regulating plate spring 6 and the base 9 to the top of regulating plate spring receives the pressure that comes from the U-shaped bull stick, and deformation is more serious, and pressure is big more, and the effort that the U-shaped bull stick was executed to the plate spring is big more, and the U-shaped bull stick anticlockwise rotation is fast more, and the bedplate reply speed is fast more, finally plays the effect of adjustment bedplate reply speed.

The plate spring is in a certain radian after being subjected to heat treatment, so that certain prestress is generated, the strength and the rigidity of the plate spring are improved, the tensile stress caused by external load (U-shaped pull rod) is offset or reduced, the structure of the plate spring is prevented from being damaged, and the service life of the plate spring is prolonged.

The return speed of each seat is enabled to be consistent by adjusting the screw of each seat.

As shown in fig. 4, 6 and 8, two plate springs 6 may be provided according to actual requirements, and correspondingly, two mounting holes 22 are provided on the base 9.

And a rivet nut (not shown in the figure) connected with a screw is fixedly arranged in the middle of the plate spring 6. The plate spring 6 is provided at the middle thereof with a mounting hole 61, and the blind rivet nut is fixed to the mounting hole 61 by a blind rivet nut gun so that the outer peripheral surface of the blind rivet nut is fitted to the inner wall surface of the mounting hole 61, thereby tightly fixing the blind rivet nut to the plate spring 6. The base 9 is correspondingly provided with a mounting hole 22, and a screw passes through the mounting hole 22 to be in threaded connection with a rivet nut, so that the middle part of the plate spring 6 is connected with the base 9.

Of course, an outer hexagonal nut may be used, and a nut (not shown) to be connected with a screw is fixed in the mounting hole 61.

Preferably, the blind rivet nut is a flat-head vertical-line blind rivet nut. If the outer hexagon nut is arranged in the inner hexagon hole arranged on the plate spring 6, the sharp angle of the inner hexagon hole has the problem of large concentrated stress, and after the outer hexagon nut on the plate spring is connected by the screw, the plate spring is easy to crack at the sharp angle of the inner hexagon hole along with the increase of the service time, so that the service life of the plate spring is greatly shortened. Therefore, the flat-head vertical-grain rivet nut is adopted, only the round hole is needed to be arranged on the plate spring (the stress is uniform, the plate spring cannot crack), and then the rivet nut gun is used for enabling the flat-head vertical-grain rivet nut to be tightly attached to the inner wall surface of the round hole.

As shown in fig. 1, 2, 5, 8 and 9, a limiting block 7 is arranged at the rear end of the rotating plate 3, and a limiting plate 4 located below the chair back is correspondingly arranged on the base 9; when the seat board is in a use state, the legs of the user apply downward acting force to the front end of the rotating plate 3, so that the rotating plate 3 rotates clockwise around the axis of the rotating part 51 until the limiting block 7 abuts against the bottom surface of the limiting plate 4, the limiting plate 4 limits the rotating plate 3, the continuous clockwise rotation of the rotating plate is avoided, the human body is powerfully supported, and a comfortable seat is provided.

As shown in fig. 1, 5 and 8, the outer end of the rotating portion 51 is provided with a connecting portion 52 engaged with the rotating plate 3, and the connecting portion 52, the rotating portion 51 and the U-shaped rotating rod 5 are integrally formed. The rotating plate 3 is correspondingly provided with a clamping hole (not marked in the figure) suitable for the insertion of the connecting part 52. After the rotating plate 3 is clamped with the connecting parts 52 on the two sides, the rotating plate 3 and the connecting parts 52 are fixed, and the rotating plate can be driven to rotate when rotating. Of course, the rotating portion 51 and the rotating plate 3 may be fixed by welding.

As shown in fig. 1, fig. 2, fig. 5, fig. 6, fig. 8, and fig. 9, the base 9 includes a support base 1, and a bracket 2 fixed to the support base 1 by a bolt connection method or a welding method. From a left side view, the bracket 2 is U-shaped, and the front end and the rear end of the bracket 2 are inclined to the outside. And the limiting plate 4 is fixedly connected to the front side of the rear end of the bracket 2 through a bolt. The front end of the bracket 2 is provided with a mounting seat 8; the mounting seat 8 is opened with a first opening 81 adapted to the rotation portion 51 to be inserted and rotated.

After the U-shaped rotating rod 5 is connected with the rotating plate 3 through the connecting portion 52, the rotating portion 51 is directly inserted into the U-shaped first opening 81, so that the rotating portion 51 can rotate smoothly in the first opening 81. Of course, to avoid that one can easily remove the U-shaped lever from the first opening 81, the rotating portion can be snapped into the first opening 81.

As shown in fig. 6 and 7, the front ends of the mount 8 and the bracket 2 are U-shaped in a plan view. From the bottom view, the bottom of the mounting seat 8 is provided with a U-shaped groove 82; the groove 82 is provided with a positioning portion 83 and a positioning portion 84 integrally formed with the mounting seat, and the front end of the bracket 2 is correspondingly provided with a positioning opening 24 for inserting the positioning portion 83 and a positioning opening 23 for inserting the positioning portion 84. When the equipment, directly advance the front end of support with the mount pad cover to through location portion and location open-ended setting, can realize the fixed connection of mount pad and support, avoid the relative support of mount pad to move forward, turn left and right both sides. Specifically, the

positioning openings

23 and 24 are U-shaped, and correspondingly, the

positioning portions

83 and 84 may be U-shaped blocks or cylinders.

As shown in fig. 5, 6, 9 and 10, the top of the plate spring 6 is provided with a hook 63 integrally formed therewith and having a bottom surface abutting against the U-shaped turning bar 5. Through hook portion 63's setting, not only make the area of contact who has increased U-shaped bull stick and leaf spring 6, can also play following effect: after the U-shaped rotating rod is installed at the front end of the installation seat 8 and the installation seat 8 sleeved in the support 2, the hook part 63 of the plate spring 6 limits the U-shaped rotating rod 5, so that the installation seat is prevented from being separated from the support due to upward movement of the U-shaped rotating rod, the effect of tightly fixing the installation seat and the support is achieved, and the rapid assembly of the seat is facilitated.

Further, as shown in fig. 4 and 5, the adjustable return speed seat further includes a plastic protective cover 64 covering the top portion of the plate spring 6 and the hook portion 63. The plastic protective sleeve 64 is provided to reduce noise. The plastic protective sleeve 64 is directly sleeved in from the hook part 63, covers the top of the plate spring 6 and the inner side surface of the hook part 63 (namely, the plastic protective sleeve is attached to the inner side surfaces of the plate spring and the hook part), and is in contact with the U-shaped rotating rod 5, so that the U-shaped rotating rod 5 made of metal is prevented from being in direct contact with the plate spring 6 and being rubbed to cause large noise, and the seat cushion can be enabled to rotate stably and silently.

To sum up, the utility model provides a reply speed adjustable seat has practical reliable, reply steady, speed adjustable, longe-lived advantage.

It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such alterations and modifications should fall within the scope of the appended claims.

Claims

1. A chair with adjustable return speed comprises a base, a rotating plate, a chair back arranged on the base and a seat plate fixedly connected to the rotating plate; it is characterized by also comprising a plate spring and a U-shaped rotating rod;

2. The adjustable seat of claim 1, wherein the top of the leaf spring is provided with a hook portion integrally formed therewith and having a bottom surface abutting the U-shaped pivot bar.

3. The chair with adjustable return speed according to claim 2, wherein a positioning block is disposed at the bottom of the plate spring, and the base is correspondingly provided with a positioning hole for inserting the positioning block.

4. The seat with the adjustable return speed according to claim 1, wherein a rivet nut connected with a screw is fixedly arranged at the middle part of the plate spring.

5. The adjustable-return-speed seat according to claim 4, wherein the blind rivet nut is a flat-head vertical-thread blind rivet nut.

6. The seat with the adjustable return speed according to claim 1, wherein the outer end of the rotating portion is provided with a connecting portion which is clamped with the rotating plate, and the rotating plate is correspondingly provided with a clamping hole which is suitable for the connecting portion to be inserted into.

7. The adjustable seat of claim 1, wherein the base comprises a support base, a bracket fixed to the support base; from a left side view, the bracket is U-shaped;

the limiting plate is fixedly connected to the front side of the rear end of the bracket; the front end of the bracket is provided with a mounting seat;

the mounting seat is provided with a first opening suitable for the rotating part to be inserted and rotate.

8. The adjustable return speed seat of claim 7, wherein the front ends of the mounting block and the bracket are U-shaped when viewed from above; from the upward view, the bottom of the mounting seat is provided with a U-shaped groove; the groove is internally provided with a positioning part, and the front end of the bracket is correspondingly provided with a positioning opening suitable for the insertion of the positioning part.

9. The adjustable return speed seat of claim 8, wherein the positioning opening is U-shaped.

10. The adjustable return speed seat of claim 2, further comprising a plastic protective sleeve covering the top and hook portions of the leaf spring.