CN113812793A - Chair with detachable top - Google Patents

Abstract

The invention discloses a chair, which comprises a tray, a chair seat and a chair back, wherein the chair seat is fixedly arranged above the tray, a connecting piece is arranged on the tray, the chair back is in sliding fit with the connecting piece, and the chair back is locked at different heights through a gear position locking mechanism, and is characterized in that: gear locking mechanism includes jam plate, plug-in components and push rod, and jam plate fixed mounting is equipped with a plurality of draw-in grooves on the connecting piece on the jam plate, and plug-in components horizontal slip sets up on the back of the chair, and plug-in components and draw-in groove plug connection, push rod and back of the chair sliding fit, push rod sliding drive plug-in components horizontal slip, and then accomplish plug-in components and plug connection of jam plate, make the back of the chair fixable at different heights. In the scheme, the locking mechanism is simple and reliable in structure and easy to maintain; the chair back can be adjusted in the vertical direction at any height position, and the thickness and the attractiveness of the chair are guaranteed as much as possible.

Description

Chair with detachable top

Technical Field

The invention relates to the field of home furnishing, in particular to a chair.

Background

In the prior art, the chair back of a traditional chair is short, generally, the chair back can only be supported to the position of back shoulder blades at the highest position, when a user has a rest, the user cannot lie down for rest and can only lie down on a desk, and the traditional chair is very unfavorable for cervical vertebra and lumbar vertebra; some novel chairs are similar to electronic competitive chairs, although the overall height of the chair back is increased and parts such as a headrest and the like are additionally arranged, due to the difference among human bodies, the body length of each person is different, and the required height of the chair back is different; to obtain comfortable experience, the chair needs to be customized according to the data of the user, so that the cost is higher, and the production efficiency is greatly reduced. The patent that publication number is CN209573966U discloses a quick reset structure of lift back of the chair, including the lift back of the chair and mount, the lift back of the chair locate the mount front end and with mount swing joint, the lift back of the chair includes back of the chair support, back of the chair support rear surface is equipped with buckle, connecting plate, jump ring, torsional spring and slope, the mount front surface is equipped with the lift gear strip. In the patent, the mechanism for controlling the lifting of the chair back is very complex, so that the thickness of the chair back is increased, the chair back is heavier, and the maintenance is difficult; when the chair back descends, the chair back needs to be lifted to the highest position, and then the chair back can fall down, so that the height adjustment process of the chair back is long, and even the height suitable for a user can be found only by repeatedly adjusting the chair back up and down.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide a chair having a simple structure, which is easy to maintain, and which can adjust the height of a seat back at will while ensuring the thickness of the seat back.

In order to achieve the purpose, the invention adopts the following technical scheme: the chair comprises a tray, a chair seat and a chair back, wherein the chair seat is fixedly arranged above the tray, a connecting piece is arranged on the tray, the chair back is in sliding fit with the connecting piece, the chair back is locked at different heights through a gear locking mechanism, a mounting seat is arranged on the chair back, and the connecting piece is inserted into the mounting seat from bottom to top and is in sliding fit with the mounting seat; the gear locking mechanism comprises a push rod, a locking plate and an inserter, the locking plate is fixedly arranged on the connecting piece, a plurality of gear clamping grooves which are vertically arranged are formed in the locking plate, the inserter is provided with a clamping block portion, a connecting head portion, a first connecting portion, a second connecting portion and a third connecting portion, the first connecting portion is located on the rear side of the mounting seat, the connecting head portion and the clamping block portion are arranged at one end of the first connecting portion, the clamping block portion and the first connecting portion are arranged on the same side of the connecting head portion, the clamping block portion is located on the front side of the first connecting portion, the second connecting portion is arranged at the other end of the first connecting portion, the second connecting portion extends forwards and is located on one side of the mounting seat, and the third connecting portion is arranged at the front end of the second connecting portion; a sliding groove communicated with the inside of the mounting seat is formed in the rear side of the mounting seat, the connecting head and the clamping block part are inserted into the sliding groove, when the connecting head slides in the sliding groove along the left-right direction, the clamping block part and the gear clamping groove can be connected in a plugging-pulling mode, the push rod is in sliding fit with the chair back, the push rod is located on the left side of the mounting seat, a linkage part is arranged on the top of the push rod in a protruding mode, the cross section of the linkage part is smaller than that of the push rod, the linkage part is located on the front side or the rear side of the third connecting part, an inclined linkage groove is formed in the linkage part, a linkage pin is arranged on the third connecting part, and the linkage pin penetrates through the linkage groove and is in sliding fit with the linkage groove; the connecting head is provided with an annular groove, the annular groove and the clamping block are respectively positioned on the left side and the right side of the connecting head, a cylindrical second positioning pin is arranged in the annular groove, a first positioning pin which is matched with the second positioning pin relatively is arranged on the mounting seat, a spring is arranged in the sliding groove, one end of the spring is sleeved on the first positioning pin, and the other end of the spring is sleeved on the second positioning pin.

Preferably, the rear side fixed mounting of mount pad has first limiting plate, sets up the first spacing groove that link up about on the first limiting plate, and first connecting portion pass first spacing groove, first connecting portion and first spacing groove sliding fit. Therefore, the plug-in position is ensured to be determined, and the position progress of the plug-in is ensured.

Preferably, the chair back is fixedly provided with a second limiting plate, the second limiting plate is positioned on one side of the mounting seat, the third connecting portion is positioned between the second limiting plate and the chair back, the second limiting groove is formed in the second limiting plate and penetrates through the second limiting plate along the vertical direction, and the linkage portion of the push rod is inserted into the second limiting groove from bottom to top. Therefore, the position precision and the accuracy of the sliding direction of the push rod are ensured.

Preferably, a third limiting groove is formed in the second limiting plate, the third limiting groove penetrates through the second limiting plate in the front-back direction and is communicated with the second limiting groove, the linkage pin extends backwards through the third limiting groove, a fourth limiting plate is fixedly mounted at the rear end of the linkage pin, and the fourth limiting plate is in sliding fit with the second limiting plate.

Preferably, the third limiting groove is a stepped groove, and the fourth limiting plate is located in the rear side section of the third limiting groove and is in sliding fit with the third limiting groove. Therefore, the thickness of the chair back is further ensured, and the reliability of the gear locking mechanism is improved.

Preferably, the push rod is sunken with a fourth limiting groove, the third limiting plate is fixed on the chair back, and the third limiting plate is in sliding fit with the fourth limiting groove. Thus, the sliding range of the push rod is limited.

Preferably, the push rod is sunken with a fifth limiting groove, the third limiting plate is provided with a second limiting protrusion, and the second limiting protrusion is inserted into the fifth limiting groove and is in sliding fit with the fifth limiting groove. Therefore, the position and the sliding direction of the push rod are limited, and the reliability and the stability of the gear locking mechanism are improved.

Preferably, the connecting piece is provided with a first limiting protrusion in a protruding manner, the mounting seat is internally provided with a sixth limiting groove in a recessed manner, and the first limiting protrusion is positioned in the sixth limiting groove and is in sliding fit with the sixth limiting groove. Therefore, the lifting direction of the chair back and the chair back are determined, so that the chair back is more smooth when being moved, the position relation and the matching relation between the chair back and the gear locking mechanism are also ensured, and the gear locking mechanism is prevented from being damaged.

Preferably, the waist support device is also provided with an air bag for supporting the waist of a human body, and further comprises an inflation ball and an exhaust valve for controlling the air bag. Therefore, the practicability and the comfort of the chair are improved.

The chair back has the advantages that the height of the chair back is limited through the plug-in connection of the plug-in and the locking plate, so that the chair back can be adjusted up and down at any height position; the height of the chair back is limited by the matching among the mounting seat, the locking plate, the plug-in and the push rod, so that the structure is simplified, the chair back is more reliable and is easier to maintain; in the scheme, the gear locking mechanism only slightly increases the thickness of the chair back, and the thickness of the chair back can not be increased even when the gear locking mechanism is applied to the chair back with thick and heavy root parts, so that the attractiveness of the chair is ensured while the function is realized.

Drawings

FIG. 1 is an overall perspective view of a chair;

FIG. 2 is a schematic view of a chair;

FIG. 3 is an exploded view of the chair;

FIG. 4 is a schematic view of the structure of the insert;

FIG. 5 is a schematic structural view of the push rod;

FIG. 6 is a first schematic structural diagram of a cover plate;

FIG. 7 is a second schematic structural view of a cover plate;

fig. 8 is a schematic diagram of a third limiting plate structure.

Reference numerals: 1. a tray; 2. a chair seat; 3. a connecting member; 4. a chair back; 5. a headrest frame; 6. a cavity; 61. a mounting seat; 611. a support wall; 612. a cover plate; 6121. a sliding groove; 6123. a first positioning pin; 6125. a sixth limiting groove; 62. a locking plate; 63. a plug-in; 631. a connecting head; 632. a first connection portion; 633. a clamping block part; 634. a linkage pin; 635. an annular groove; 636. a second connecting portion; 637. a third connecting portion; 64. a push rod; 641. a linkage section; 6411. a linkage groove; 642. a fourth limit groove; 643. a fifth limiting groove; 644. pressing a plate; 65. a second limiting plate; 66. a first limit plate; 67. a fourth limiting plate; 68. a third limiting plate; 681. a second limit bulge; 7. an air bag.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

A chair as shown in fig. 1-8, including tray 1, seat support 2 and back of the chair 4, seat support 2 fixed mounting is in tray 1 top, and back of the chair 4 passes through connecting piece 3 and tray 1 sliding connection, and connecting piece 3 one end is fixed on tray 1, and the other end and the back of the chair 4 sliding fit of connecting piece 3, back of the chair 4 can pass through gear locking mechanism locking in the height of difference.

The chair back 4 is provided with a cavity 6 with a downward opening, a mounting seat 61 with a downward opening is fixed in the cavity 6, the mounting seat 61 comprises a supporting wall 611 and a cover plate 612, the supporting wall 611 is downward opened and is shaped like a Chinese character 'ao', the cover plate 612 is fixedly arranged at the rear end of the supporting wall 611, the supporting wall 611 is fixed on the front side wall of the cavity 6, and the connecting piece 3 is inserted into the mounting seat 61 from bottom to top and is in sliding fit. The gear locking mechanism comprises a push rod 64, a locking plate 62 and a plug-in 63, the locking plate 62 is fixedly mounted on the connecting piece 3, and a plurality of gear clamping grooves are formed in the locking plate 62. The gear locking mechanism comprises a push rod 64, a locking plate 62 and an insert 63, the locking plate 62 is fixedly mounted on the connecting piece 3, a plurality of gear clamping grooves which are arranged up and down are formed in the locking plate 62, the insert 63 is provided with a fixture block portion 633, a connecting head portion 631, a first connecting portion 632, a second connecting portion 636 and a third connecting portion 637, the first connecting portion 632 is located on the rear side of the mounting seat 61, one end of the first connecting portion 632 is provided with the connecting head portion 631 and the fixture block portion 633, the fixture block portion 633 and the first connecting portion 632 are arranged on the same side of the connecting head portion 631, the fixture block portion 633 is located on the front side of the first connecting portion 632, the other end of the first connecting portion 632 is provided with the second connecting portion 636, the second connecting portion 636 extends forwards and is located on one side of the mounting seat 61, and the third connecting portion 637 is arranged on the front end of the second connecting portion 636; a sliding groove 6121 communicated with the inside of the installation seat 61 is formed in the rear side of the installation seat 61, the sliding groove 6121 penetrates through the cover plate 612, the connecting head 631 and the clamping block 633 are inserted into the sliding groove 6121, when the connecting head 631 slides in the sliding groove 6121 in the left-right direction, the clamping block 633 and the gear clamping groove can be connected in a plugging mode, the push rod 64 is in sliding fit with the seat back 4, the push rod 64 is located on the left side of the installation seat 61, a linkage part 641 protrudes from the top of the push rod 64, the cross section of the linkage part 641 is smaller than that of the push rod 64, the linkage part 641 is located on the front side or the rear side of the third connecting part 637, an inclined linkage groove 6411 is formed in the linkage part 641, a linkage pin 634 is arranged on the third connecting part 637, and the linkage pin 634 penetrates through the linkage groove 6411 and is in sliding fit with the linkage groove 6411; the connecting head 631 is provided with an annular groove 635, the annular groove 635 and the fixture block 633 are respectively located on the left side and the right side of the connecting head 631, a cylindrical second positioning pin is arranged in the annular groove 635, the mounting seat 61 is provided with a first positioning pin 6123 which is matched with the second positioning pin relatively, a spring is arranged in the sliding groove 6121, one end of the spring is sleeved on the first positioning pin 6123, and the other end of the spring is sleeved on the second positioning pin.

In this embodiment, the first limiting plate 66 is fixedly mounted on the rear side of the cover plate 612 of the mounting seat 61, a first limiting groove penetrating from left to right is formed on the first limiting plate 66, the first connecting portion 632 passes through the first limiting groove, and the first connecting portion 632 is in sliding fit with the first limiting groove. Fixed mounting has second limiting plate 65 in the cavity 6 of the back of the chair 4, and second limiting plate 65 is located mount pad 61 left side or right side, and second limiting plate 65 is located third connecting portion 637 front side or rear side, has seted up the second spacing groove on the second limiting plate 65, and the second limiting plate 65 is run through to the direction about the second spacing groove, and linkage portion 641 of push rod 64 is from upwards inserting the second spacing inslot and both sliding fit down. Further, protruding on the preceding lateral end wall of cavity 6 has a plurality of fixing bases, and second limiting plate 65 passes through fastener and a plurality of fixing base fixed connection, and then makes to have certain clearance between the left side end wall of second limiting plate 65 and cavity 6, and the trailing flank of second spacing seat 66 is no longer than mount pad 61 trailing flank. A third limiting groove is formed in the second limiting plate 65, the second limiting plate 65 is communicated with the third limiting groove in the front-back direction, and the linkage pin 634 passes through the linkage groove 6411 and then enters the third limiting groove; a fourth limiting plate 67 is fixedly mounted on the linkage pin 634, and the fourth limiting plate 67 is in sliding fit with the third limiting groove in the left-right direction. . A fourth limit groove 642 is sunken in the push rod 64, one end of a third limit plate 68 is fixed on the mounting seat 61 through a fastener, and the other end of the third limit plate 68 is fixedly connected with a fixed seat in the cavity 6 of the chair back 4 through a fastener; the third stopper plate 68 is slidably fitted in the fourth stopper groove 642. The push rod 64 is recessed with a fifth limiting groove 643, the push rod 64 is raised with a second limiting projection 681, and the projection 681 of the third limiting plate 68 is inserted into the fifth limiting groove 643 and is in sliding fit.

In this embodiment, the connecting member 3 has a first limiting protrusion protruding thereon, the mounting seat 61 has a sixth limiting groove 6125 recessed therein, the first limiting protrusion is inserted into the sixth limiting groove 6125 and is in sliding fit with the sixth limiting groove 6125, the sixth limiting groove 6125 is located on the front side of the cover plate 612 of the mounting seat 61, and the sixth limiting groove 6125 extends in the up-down direction.

In this embodiment, the chair back 4 includes a front back plate and a back plate, the back side of the front back plate is recessed forward, the front side of the back plate is recessed backward, the front back plate and the back plate are buckled and fixedly connected, a cavity 6 is formed in the recessed area of the front back plate and the back plate, and the bottom of the cavity 6 is recessed downward to penetrate through the front back plate and the back plate.

In this embodiment, a headrest frame 5 is fixedly mounted on the top of the seat back 4.

In the embodiment, the size-adjustable air bag 7 is arranged on the chair back 4, the air bag 7 is used for supporting the waist of a human body, and the air bag 7 is arranged on the front side of the chair back; and also comprises an inflation ball and an exhaust valve for controlling the air bag 7.

In this embodiment, the adjusting process of the chair back is as follows: under initial state, the spring is in the relaxed state, and fixture block 633 inserts in the gear draw-in groove of jam plate 62, when adjusting back of the chair 4 height: the push rod 64 is pushed upwards, the push rod 64 pushes the linkage pin 634 to move rightwards through the inclined linkage groove 6411, the linkage pin 634 drives the first connecting part 632 to move rightwards, the first connecting part 632 drives the connecting head 631 to move rightwards, the connecting head 631 drives the fixture block 633 to move rightwards, the fixture block 633 is separated from the locking plate 62, and the spring is compressed to be in a force storage state; the chair back 4 is moved upwards or downwards, after the chair back 4 is adjusted to a proper height, the push rod 64 is released, the spring pushes the connecting head 61 to move leftwards, the connecting head 61 drives the fixture block 633 to be inserted into the gear clamping groove of the locking plate 62, the connecting head 631 drives the guide 632 plate to move leftwards, and the first connecting part 632 drives the push rod 64 to move downwards through the linkage pin 634, so that the height of the chair back 4 is adjusted. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.

Claims (9)

1. The utility model provides a chair, includes tray (1), seat support (2) and the back of the chair (4), and seat support (2) fixed mounting installs connecting piece (3) in tray (1) top on tray (1), back of the chair (4) and connecting piece (3) sliding fit, and back of the chair (4) lock on different heights through gear locking mechanism, its characterized in that: the chair back (4) is provided with a mounting seat (61), and the connecting piece (3) is inserted into the mounting seat (61) from bottom to top and is in sliding fit with the mounting seat (61); the gear locking mechanism comprises a push rod (64), a locking plate (62) and an insert (63), the locking plate (62) is fixedly installed on the connecting piece (3), a plurality of gear clamping grooves which are arranged up and down are formed in the locking plate (62), the insert (63) is provided with a clamping block portion (633), a connecting head portion (631), a first connecting portion (632), a second connecting portion (636) and a third connecting portion (637), the first connecting portion (632) is located on the rear side of the installation seat (61), one end of the first connecting portion (632) is provided with the connecting head portion (631) and the clamping block portion (633), the clamping block portion (633) and the first connecting portion (632) are arranged on the same side of the connecting head portion (631), the clamping block portion (633) is located on the front side of the first connecting portion (632), the other end of the first connecting portion (632) is provided with the second connecting portion (636), the second connecting portion (636) extends forwards and is located on one side of the installation seat (61), the third connecting part (637) is arranged at the front end of the second connecting part (636); a sliding groove (6121) communicated with the inside of the mounting seat (61) is formed in the rear side of the mounting seat (61), the connecting head (631) and the clamping block (633) are inserted into the sliding groove (6121), when the connecting head (631) slides in the sliding groove (6121) in the left-right direction, the clamping block (633) and the gear clamping groove can be connected in a plugging mode, the push rod (64) and the chair back (4) are in sliding fit, the push rod (64) is located on the left side of the mounting seat (61), a linkage part (641) is protruded at the top of the push rod (64), the cross section of the linkage part (641) is smaller than that of the push rod (64), the linkage part (641) is located on the front side or the rear side of the third connecting part (637), an inclined linkage groove (6411) is formed in the linkage part (641), a linkage pin (634) is arranged on the third connecting part (637), and penetrates through the linkage groove (6411) and is in sliding fit with the linkage groove (6411); seted up ring channel (635) on connecting head (631), relative both sides about ring channel (635) and fixture block portion (633) are located connecting head (631) respectively, are equipped with cylindric second locating pin in ring channel (635), are equipped with on mount pad (61) and go up first locating pin (6123) with the relative complex of second locating pin, and a spring setting is in groove (6121) slides, and spring pot head is on first locating pin (6123), and the other end cover of spring is on the second locating pin.

2. A chair according to claim 1, wherein: the rear side fixed mounting of mount pad (61) has first limiting plate (66), offers on first limiting plate (66) about the first spacing groove that link up, first connecting portion (632) pass first spacing groove, first connecting portion (632) and first spacing groove sliding fit.

3. A chair according to claim 1, wherein: fixed mounting has second limiting plate (65) on back of the chair (4), and second limiting plate (65) are located mount pad (61) one side, and third connecting portion (637) are located between second limiting plate (65) and back of the chair (4), have seted up the second spacing groove on second limiting plate (65), and second spacing groove runs through second limiting plate (65) along upper and lower direction, and linkage portion (641) of push rod (64) are from upwards inserting the second spacing inslot down.

4. A chair according to claim 3, wherein: the third limiting groove is formed in the second limiting plate (65), the front and back direction of the third limiting groove penetrates through the second limiting plate (65) and is communicated with the second limiting groove, the linkage pin (634) extends backwards through the third limiting groove, the rear end of the linkage pin (634) is fixedly provided with a fourth limiting plate (67), and the fourth limiting plate (67) is in sliding fit with the second limiting plate (65).

5. A chair according to claim 4, wherein: the third limiting groove is a stepped groove, and the fourth limiting plate (67) is located in the rear side section of the third limiting groove and is in sliding fit with the third limiting groove.

6. A chair according to claim 1, wherein: a fourth limiting groove (642) is sunken in the push rod (64), the third limiting plate (68) is fixed on the chair back (4), and the third limiting plate (68) is in sliding fit with the fourth limiting groove (642).

7. A chair according to claim 6, wherein: the push rod (64) is sunken to be provided with a fifth limiting groove (643), the third limiting plate (68) is provided with a second limiting protrusion (681) in a protruding mode, and the second limiting protrusion (681) is inserted into the fifth limiting groove (643) and is in sliding fit with the fifth limiting groove (643).

8. A chair according to claim 1, wherein: the connecting piece (3) is provided with a first limiting protrusion in a protruding mode, the mounting seat (61) is internally provided with a sixth limiting groove (6125) in a recessed mode, and the first limiting protrusion is located in the sixth limiting groove (6125) and is in sliding fit with the sixth limiting groove.

9. A chair according to claim 1, wherein: also comprises an air bag (7) for supporting the waist of a human body, and an inflatable ball and an exhaust valve for controlling the air bag (7).

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