CN211423156U

CN211423156U - Ratchet structure and office chair assembled with same

Info

Publication number: CN211423156U
Application number: CN202020085361.1U
Authority: CN
Inventors: 王昱慧; 王丛; 黄朝旭
Original assignee: Guangdong Shunde Jimu Industrial Design Co ltd
Current assignee: Guangdong Shunde Jimu Industrial Design Co ltd
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-09-04
Anticipated expiration: 2030-01-15

Abstract

The utility model discloses a ratchet structure and an office chair assembled with the ratchet structure, which comprises a ratchet structure and an office chair, wherein the ratchet structure comprises a ratchet gear, a ball, a spring and a pawl wheel, and a plurality of end faces penetrating through the ratchet gear and mounting grooves communicated with the side face of the ratchet gear are uniformly arranged on the end face of the ratchet gear by taking the center of the ratchet gear as the circle center; the spring is arranged in the mounting groove along the diameter direction of the ratchet gear; the ball is arranged at the end part of the spring close to the side surface of the ratchet wheel; the pawl wheel have the hole to the side of hole on the interior hole center as the even ratchet that is provided with mounting groove quantity the same of centre of a circle, ratchet end to end distribute in proper order on the hole side, the ratchet has inclined plane and arcwall face, the profile and the cooperation of ball slidable of arcwall face, the pawl wheel be provided with two to the setting of coaxial symmetry is in the both sides of ratchet gear terminal surface, the utility model discloses simple structure, convenient to use.

Description

Ratchet structure and office chair assembled with same

Technical Field

The utility model relates to a technical field of official working seat specifically is a ratchet structure and assembles office chair of this structure.

Background

Ratchets (ratchets), defined as gears with a rigid toothed or friction surface on the outer or inner edge, are important components that make up ratchet mechanisms. The ratchet is driven by a pawl to move in steps, and the meshing motion is characterized in that the ratchet can only rotate in one direction and cannot rotate reversely.

The handrail of present office chair all is fixed, and the shank bearing structure who sets up all sets up extendible bearing structure in office chair's cushion bottom to when needs, this bearing structure of extension just can reach the purpose that the shank of support is convenient for to have a rest, and the length of the bearing structure extension of this kind of mode is not enough, and the effect of supporting the shank is not obvious, and the bearing structure who increases has increased the cost of product.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a ratchet structure and assemble office chair of this structure provides a new ratchet structure to combine this ratchet structure to office chair armrest structure, and then provide the structure that can support the shank of one kind, simple structure, the cost is reduced.

In order to achieve the above object, the utility model provides a following technical scheme: a ratchet knot structure comprising a ratchet gear, a ball, a spring and a ratchet wheel, wherein:

the end surface of the ratchet gear takes the center of the ratchet gear as the center of a circle and is uniformly provided with a plurality of mounting grooves which penetrate through the end surface of the ratchet gear and are communicated with the side surface of the ratchet gear;

the spring is arranged in the mounting groove along the diameter direction of the ratchet gear;

the ball is arranged at the end part of the spring close to the side surface of the ratchet wheel;

the ratchet wheel is provided with an inner hole, ratchets with the same number as the mounting grooves are uniformly arranged on the side surface of the inner hole by taking the center of the inner hole as the center of a circle, the ratchets are sequentially distributed on the side surface of the inner hole in an end-to-end manner, each ratchet is provided with an inclined plane and an arc-shaped surface, the outline of each arc-shaped surface is matched with the corresponding ball in a sliding manner, the two ratchet wheels are coaxially and symmetrically arranged on two sides of the end surface of the ratchet gear, the ratchet gears are concentrically arranged in the inner holes of the ratchet wheels, the balls are matched with the inclined planes and the arc-shaped surfaces of the ratchets in a sliding manner, and the ratchet.

Based on the technical scheme, the ratchet gear can rotate in the pawl wheel and is limited to rotate in the opposite direction, and the damping of each rotation can be increased by matching the spring and the ball, so that the rotating hand feeling is improved. When ratchet gear restricted pawl wheel rotated, the ball was located the cambered surface, and the ball is provided with a plurality ofly, and support when restricting was more stable.

Furthermore, the end face of the ratchet gear is provided with two protruding blocks, the protruding blocks extend out of the inner hole after the ratchet gear is assembled into the inner hole of the pawl wheel, the two blocking plates are symmetrically arranged on the outer sides of the pawl wheel respectively, and the blocking plates are detachably connected with the pawl wheel and can be abutted against the protruding blocks in a separable mode.

Based on above-mentioned technical scheme, the baffle that sets up supports and leans on the protruding piece, and then realizes the axial positioning to the ratchet gear, and the baffle can be fixed with external stationary plane, and then has realized the fixed of ratchet gear, to sum up, the setting up greatly reduced the assembly degree of difficulty of ratchet gear and pawl wheel of baffle.

The utility model provides an office chair of assembly ratchet structure, the both ends of office chair utilize the pivot rotatable have about handrail, ratchet gear fixed set up in the pivot, pawl wheel detachable install on the handrail to when the handrail rotates, the pawl wheel rotates relative ratchet gear, the rotatable cushion both sides of installing at office chair of first end of handrail, the second end detachable of handrail installs on the side of the back of office chair, the arcwall face of ratchet be located the clockwise place ahead of oblique straight face to after the second end of handrail is demolishd on the side of back, can rotate arbitrary angle counterclockwise, and restriction handrail clockwise rotation.

Based on above-mentioned technical scheme, the back is installed on the back to the second end of handrail, uses as the handrail, and after second end dismantles, the handrail can anticlockwise rotation to cushion the place ahead to set up the structure that can support the shank on the handrail, the ratchet structure has restricted handrail clockwise rotation, bearing shank that the handrail can be stable, the length after the handrail expandes is longer, bearing shank's effect is better. The handrail structure does not increase other complex structures, reforms existing handrail structures, and is low in cost and good in using effect.

Furthermore, the pawl wheel is detachably arranged on the baffle, and the baffle is detachably arranged on the handrail, so that the pawl wheel is detachably arranged on the handrail.

Based on above-mentioned technical scheme, use the baffle as connection structure, reduced the degree of difficulty with ratchet wheel and pawl wheel assembly on the first end of handrail.

Furthermore, the office chair further comprises a leg support block, and when the armrest rotates anticlockwise to the front of the office chair, the leg support block can be movably arranged on the side face, close to the second end, of the armrest.

Based on above-mentioned technical scheme, when needs have a rest, the shank supporting shoe is placed on rotatory handrail to the place ahead for the bearing shank.

Furthermore, a placing groove is formed in the side face, close to the second end, of each armrest, and a placing frame is arranged on the bottom supporting structure of the office chair.

Based on above-mentioned technical scheme, when the rest, the standing groove is convenient for spacing the shank supporting shoe on the second tip of handrail, and when normally taking, the shank supporting shoe can be placed on the rack, convenient to use.

Furthermore, the two sides of the backrest of the office chair are provided with positioning plates, the second end part of the armrest is provided with a fixing structure, the fixing structure comprises an installation seat, a locking spring, a pin shaft and a switch, the installation seat is fixedly arranged in the second end part of the armrest, an installation cavity is arranged in the installation seat and is communicated with the side surface of the second end part, which is just opposite to the backrest, the locking spring is vertically arranged in the installation cavity together with the backrest, the switch is slidably arranged on the top surface of the second end part along the direction vertical to the backrest, the bottom end of the switch extends into the installation cavity and is abutted against the end part of the locking spring, the pin shaft is fixedly arranged on the side surface of the bottom end of the switch, the pin shaft extends out of the installation cavity under the support of the locking spring, the sliding switch can drive the pin shaft to slide into the installation cavity, and the positioning plates are provided with positioning holes, and is adapted to the diameter of the pin.

Based on above-mentioned technical scheme, slide switch can pull out the round pin axle in the mounting hole to the second end of handrail can be dismantled on the back, and after removing the strength on the switch, locking spring can promote the downthehole slip of round pin axial mounting, and especially when the second end of handrail rotates to the locating plate, the round pin axle of locating plate limiting position can be gone into the mounting hole and realize fixing a position under locking spring's promotion after being close to the mounting hole.

Drawings

Fig. 1 is an exploded view of the ratchet structure of the present invention;

FIG. 2 is a schematic view of an office chair according to the present invention;

fig. 3 is a partial schematic view of the ratchet structure of the present invention assembled in a handrail;

fig. 4 is a schematic view of the fixed state of the armrest and the backrest of the present invention;

fig. 5 is a top view of the second end of the armrest of the present invention engaged with the positioning plate;

fig. 6 is a cross-sectional view of the second end of the armrest of the present invention engaged with the positioning plate;

fig. 7 is a schematic view of the ratchet structure of the present invention assembled in a handrail.

In the figure: ratchet-1, ball-2, spring-3, pawl wheel-4, mounting groove-5, inner hole-6, ratchet-7, inclined plane-8, arc surface-9, raised block-10, baffle-11, office chair-12, armrest-13, first end-14, cushion-15, second end-16, backrest-17, leg support block-18, placing groove-19, placing rack-20, positioning plate-21, mounting seat-22, locking spring-23, pin shaft-24, switch-25 and positioning hole-26.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to the drawings, the present invention provides an embodiment: a ratchet structure comprising a ratchet gear 1, a ball 2, a spring 3 and a ratchet wheel 4, wherein:

the end surface of the ratchet gear 1 is uniformly provided with a plurality of mounting grooves 5 which penetrate through the end surface of the ratchet gear 1 and are communicated with the side surface of the ratchet gear 1 by taking the center of the ratchet gear 1 as the center of a circle.

The spring 3 is arranged in the mounting groove 5 along the diameter direction of the ratchet wheel 1, preferably, the bottom of the spring 3 is fixedly arranged at the bottom of the mounting groove 5, and the spring 3 can be compressed in the mounting groove 5.

The ball 2 is arranged on the end part of the spring 3 close to the side surface of the ratchet wheel 1, and the diameter of the ball 2 is matched with the width of the mounting groove 3 in a sliding way.

The ratchet wheel 4 is provided with an inner hole 6, ratchets 7 with the same number as the mounting grooves 5 are uniformly arranged on the side surface of the inner hole 6 by taking the center of the inner hole 6 as the center of a circle, the ratchets 7 are sequentially distributed on the side surface of the inner hole 6 in an end-to-end manner, each ratchet 7 is provided with an inclined plane 8 and an arc-shaped plane 9, the outline of each arc-shaped plane 9 is matched with the ball 2 in a sliding manner, the ratchet wheel 4 is provided with two ratchets and coaxially and symmetrically arranged on two sides of the end surface of the ratchet gear 1, the ratchet gear 1 is concentrically arranged in the inner hole of the ratchet wheel 4, the ball 2 is matched with the inclined plane 8 and the arc-shaped plane 9 of each ratchet 7 in a sliding manner, and the. The ball 2 is kept in slidable engagement with the inclined plane 8 and the arc-shaped face 9 under the urging of the spring 3.

The end face of the ratchet gear 1 is provided with a protruding block 10, after the ratchet gear 1 is assembled into the inner hole 6 of the pawl wheel 4, the protruding block 10 extends out of the inner hole 6, the ratchet structure further comprises two baffle plates 11, the two baffle plates 11 are symmetrically arranged on the outer side of the pawl wheel 4 respectively, the baffle plates 11 are detachably connected with the pawl wheel 4 and can be abutted against the protruding block 10 in a separable mode, and the baffle plates 11 can limit the balls 2 to slide out of the mounting grooves 5.

An office chair with a ratchet wheel structure is provided, wherein a left handrail 13 and a right handrail 13 are rotatably arranged at two ends of an office chair 12 by a rotating shaft, a ratchet wheel 1 is fixedly arranged on the rotating shaft, a pawl wheel 4 is detachably arranged on the handrails 13, the pawl wheel 4 rotates relative to the ratchet wheel 1 when the handrails 13 rotate, a first end 14 of the handrail 13 is rotatably arranged at two sides of a cushion 15 of the office chair 1, a second end 16 of the handrail 13 is detachably arranged on the side surface of a backrest 17 of the office chair 1, an arc-shaped surface 9 of a ratchet 7 is positioned in front of an inclined straight surface 8 clockwise, the handrail 13 can rotate at any angle in a counterclockwise direction after the second end 16 of the handrail 13 is detached from the side surface of the backrest 17, specifically, a key is arranged on the rotating shaft, a first mounting hole is arranged on the ratchet wheel 1, and a first groove matched with the key is arranged on the first mounting hole, the baffle 11 is provided with a second mounting hole, the second mounting hole is provided with a second groove with the size larger than that of the key, the second groove is used for avoiding the key, the baffle 11 is conveniently mounted on the rotating shaft, the ratchet gear 1 is fixedly mounted on the rotating shaft by using the key and the first groove, the baffle 11 is fixedly connected with the pawl wheel 4 by using screws, and the baffle 11 is additionally provided with four screws which are mounted on the handrail 13.

Specifically, the office chair 12 further comprises a leg support block 18, and when the armrest 13 rotates counterclockwise to the front of the office chair 12, the leg support block 18 is movably disposed on the side of the armrest 13 close to the second end 16.

Specifically, a placing groove 19 is arranged on the side surface of the armrest 13 close to the second end 16, and a placing frame 20 is arranged on the bottom supporting structure of the office chair 12.

Specifically, the two sides of the backrest of the office chair 12 are provided with positioning plates 21, the second end 16 of the armrest 13 is provided with a fixing structure, the fixing structure comprises an installation seat 22, a locking spring 23, a pin shaft 24 and a switch 25, the installation seat 22 is fixedly arranged in the second end 16 of the armrest 13, an installation cavity is arranged in the installation seat 22, the installation cavity is communicated with the side surface of the second end 16, which is just opposite to the backrest 17, the locking spring 23 is vertically arranged in the installation cavity together with the backrest 17, the switch 25 is slidably arranged on the top surface of the second end 16 along the direction vertical to the backrest 17, the bottom end of the switch 25 extends into the installation cavity and abuts against the end of the locking spring 23, the pin shaft 24 is fixedly arranged on the side surface of the bottom end of the switch 25, and under the support of the locking spring 23, the pin shaft 24 extends out of the installation cavity, the sliding switch 25 can drive the pin shaft 24 to slide into the installation cavity, the pin shaft 24 slides out and slides into the installation cavity respectively under the action of the locking spring 23 and external force, and the positioning plate 21 is provided with a positioning hole 26 which is matched with the diameter of the pin shaft 24.

The working principle is as follows:

the second end 16 of the armrest 13 is secured to the back 17 of the office chair 12 during normal seating.

When a rest is needed, the pin shaft 24 is separated from the mounting hole 26 through the sliding switch 25, at the moment, the handrail 13 can rotate anticlockwise, namely, the second end 16 of the handrail 13 is positioned in front of the seat cushion 15 after rotating anticlockwise, when the handrail 13 rotates, the pawl wheel 4 rotates along with the handrail 13, at the moment, the ball 2 slides along the inclined plane 8, the spring 3 is compressed while the handrail can slide smoothly, the handrail 13 has damping during rotating anticlockwise, and impact sound can be generated after the ball 2 slides into the arc-shaped surface 9 from the inclined plane 8, so that the rotating hand feeling of the handrail 13 is increased.

When the armrest 13 is rotated to the horizontal state and positioned in front of the seat cushion 15, the rotation of the armrest 13 is stopped, and the leg support block 18 is placed on the armrest 13, so that the rider can take a rest.

When the fixed structure is used, the end of the pin 24 slides against the positioning plate 21 after the second end 16 of the armrest 13 is close to the positioning plate 21, and the pin 24 is inserted into the mounting hole 26 after the locking spring 23 is abutted against the mounting hole 26. When it is desired to remove the second end 16 from the backrest 17, the pin 24 can be pulled out of the mounting hole 26 by sliding the switch 25.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A ratchet structure, comprising: including ratchet gear, ball, spring and pawl wheel, wherein:

2. A ratchet structure according to claim 1, wherein: the ratchet structure comprises a ratchet wheel and a ratchet wheel, wherein the ratchet wheel is provided with a ratchet wheel, the ratchet wheel is provided with a plurality of ratchet wheels, the ratchet wheel is provided with a plurality of convex blocks, the convex blocks extend out of the inner hole after the ratchet wheel is assembled into the inner hole of the ratchet wheel, the ratchet wheel structure further comprises two baffle plates, the two baffle plates are symmetrically arranged on the outer side of the ratchet wheel respectively, and the baffle plates are detachably connected with the ratchet wheel and can be abutted against the convex blocks in a separable.

3. An office chair equipped with a ratchet structure, said office chair being equipped with a ratchet structure according to claim 1, wherein: the two ends of the office chair are provided with left and right armrests by utilizing the rotating shaft to rotate, the ratchet gear is fixedly arranged on the rotating shaft, the pawl wheel is detachably arranged on the armrests, when the armrests rotate, the pawl wheel rotates relative to the ratchet gear, the first end parts of the armrests are rotatably arranged on two sides of a cushion of the office chair, the second end parts of the armrests are detachably arranged on the side surface of a backrest of the office chair, the arc-shaped surface of the ratchet is positioned in the clockwise front of the oblique straight surface, and after the second end parts of the armrests are detached on the side surface of the backrest, the armrest can rotate at any angle in a counterclockwise direction to limit the clockwise rotation of the armrests.

4. An office chair equipped with a ratchet structure according to claim 3, wherein: the ratchet wheel is detachably arranged on the baffle, the baffle is detachably arranged on the handrail, and therefore the ratchet wheel is detachably arranged on the handrail.

5. An office chair equipped with a ratchet structure according to claim 4, wherein: the office chair further comprises a leg supporting block, and when the armrest rotates anticlockwise to the front of the office chair, the leg supporting block is movably arranged on the side face, close to the second end, of the armrest.

6. An office chair equipped with a ratchet structure according to claim 5, wherein: the side face, close to the second end portion, of the armrest is provided with a placing groove, and a placing frame is arranged on a bottom supporting structure of the office chair.

7. An office chair equipped with a ratchet structure according to claim 6, wherein: the back of the office chair is provided with positioning plates at two sides, the second end of the armrest is provided with a fixing structure, the fixing structure comprises a mounting seat, a locking spring, a pin shaft and a switch, the mounting seat is fixedly arranged in the second end of the armrest, a mounting cavity is arranged in the mounting seat and is communicated with the side surface of the second end, which is just opposite to the back, the locking spring is vertically arranged in the mounting cavity together with the back, the switch is slidably arranged on the top surface of the second end along the direction vertical to the back, the bottom end of the switch extends into the mounting cavity and is abutted against the end part of the locking spring, the pin shaft is fixedly arranged on the side surface of the bottom end of the switch, the pin shaft extends out of the mounting cavity under the support of the locking spring, the sliding switch can drive the pin shaft to slide into the mounting cavity, and the positioning plates are provided with positioning holes, and is adapted to the diameter of the pin.