CN217885507U - Chair with detachable top - Google Patents

Abstract

The utility model discloses a chair, including tray, seat support and the back of the chair, seat support fixed mounting installs the connecting piece in the tray top on the tray, the back of the chair and connecting piece sliding fit, the back of the chair passes through gear locking mechanism and locks its characterized in that on the co-altitude: the gear locking mechanism comprises a locking plate, an insert and a push rod, the locking plate is fixedly arranged on the connecting piece, a plurality of clamping grooves are formed in the locking plate, the insert is arranged on the chair back in a left-right sliding mode and is connected with the clamping grooves in a plugging mode, the push rod is in sliding fit with the chair back, the push rod drives the insert to slide left and right in a sliding mode, the plug-in connection of the insert and the locking plate is further completed, and the chair back can be fixed at different heights; the size-adjustable air bag is arranged on the chair back and is used for supporting the waist of a human body. 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 utility model relates to a house field especially relates 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 contest chairs, although the overall height of a chair back is increased, 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 with publication number 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 above patent, the mechanism for controlling the lifting of the chair back is very complex, which not only increases the thickness of the chair back, makes the chair back heavier, but also is not easy to maintain; 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.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, an object of the present invention is to provide a chair, which has a simple structure and is easy to maintain, and the height of the chair back can be adjusted at will.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the automatic locking device comprises a tray, a seat and a chair back, wherein the 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, the gear locking mechanism comprises a locking plate, an insert and a push rod, the locking plate is fixedly arranged on the connecting piece, a plurality of gear clamping grooves are formed in the locking plate, the insert is arranged on the chair back in a left-right sliding mode, the insert is connected with the gear clamping grooves in a plugging mode, the push rod is in sliding fit with the chair back, the push rod drives the insert to slide left and right in a sliding mode, and therefore the insert can be connected with the gear clamping grooves in a plugging mode, and the chair back can be fixed at different heights; the size-adjustable air bag is arranged on the chair back and is used for supporting the waist of a human body.

Preferably, the chair back is provided with a mounting seat, the mounting seat comprises a supporting wall and a cover plate, the supporting wall is fixed on the chair back, the cover plate is fixedly installed at the rear end of the supporting wall, the cover plate seals the rear side of the supporting wall, the connecting piece is inserted between the supporting wall and the cover plate from bottom to top, a sliding groove is formed in the cover plate, the plug-in piece penetrates through the sliding groove and is connected with the gear clamping groove in a plugging and unplugging mode, the plug-in piece is in sliding fit with the sliding groove, and the push rod is located on the left side or the right side of the mounting seat. This increases the stability and reliability of the entire locking mechanism.

Preferably, the plug-in components have fixture block portion, connecting head, first connecting portion, second connecting portion and third connecting portion, first connecting portion are located the mount pad rear side, the one end of first connecting portion sets up connecting head and fixture block portion, fixture block portion and first connecting portion set up in the same one side of connecting head, fixture block portion is located the front side of first connecting portion, the other end of first connecting portion sets up the second connecting portion, second connecting portion extend forward and lie in mount pad one side, the third connecting portion set up at second connecting portion front end, connecting head and fixture block portion insert the sliding groove, when connecting head slides along the left and right directions in the sliding groove, plug-in connection can be realized to fixture block portion and gear draw-in groove. Therefore, the locking mechanism is ensured to be not to increase the thickness of the chair back as much as possible, and the attractiveness of the chair is ensured.

Preferably, the cover plate is fixedly provided with a first limiting plate at the rear side, the first limiting plate is provided with a first limiting groove which is communicated with the left and the right, and the first connecting part penetrates through the first limiting groove and is in sliding fit with the first limiting groove.

Preferably, a linkage part is protruded from the top of the push rod, the cross section of the linkage part is smaller than that of the push rod, the third connecting part is positioned on the front side or the rear side of the linkage part, an inclined linkage groove is formed in the linkage part, and a linkage pin penetrates through the linkage groove and is in sliding fit with the linkage groove.

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, the second limiting plate penetrates through the second limiting groove in the vertical direction, and the linkage portion of the push rod is inserted into the second limiting groove from bottom to top and is in sliding fit with the second limiting groove and the chair back.

Preferably, a third limiting groove is formed in the second limiting plate, the second limiting plate penetrates through the third limiting groove in the front-back direction, the linkage pin penetrates through the third limiting groove, the linkage pin is in sliding fit with the third limiting groove in the left-right direction, a fourth limiting plate is fixedly mounted on the linkage pin, and the fourth limiting plate is in sliding fit with the second limiting plate. Therefore, stability of the push rod and the plug-in unit in the linkage process is guaranteed, and reliability of the locking mechanism is improved.

Preferably, a third limiting plate is fixed on the chair back and located on the left side of the push rod, a fourth limiting groove is formed in the push rod in a recessed mode, 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 provided with a fifth limiting groove in a concave manner, the push rod is provided with a second limiting protrusion in a protruding manner, 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 locking mechanism are improved.

Preferably, the air pump and the control valve are used for controlling the air bag.

The utility model has the advantages that the simple components can realize the up-and-down adjustment of the chair back through the locking plate, the plug-in and the push rod, so that the chair has lower cost and is easier to maintain; the thickness of the chair back can be ensured through the matching mode and the position relation between the components in the locking mechanism and the chair back, and the chair back is ensured not to be heavy and the appearance of the chair back is kept; in the scheme, the waist is supported by the air bag, so that the comfort of the chair can be improved, and the weight of the chair back cannot be increased.

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 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 stopper 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 locating 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 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 exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present 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 or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed 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 to implicitly indicate 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," and "fixed" are to be construed broadly and may, 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. 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; seted up ring channel 635 on connecting head 631, relative both sides about connecting head 631 are located respectively to ring channel 635 and fixture block 633, are equipped with cylindric second locating pin in the ring channel 635, are equipped with the first locating pin 6123 of the relative complex with the second locating pin on the mount pad 61, and a spring setting is in sliding groove 6121, and spring pot head is on first locating pin 6123, and the other end cover of spring is on the second locating 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 enters the third limiting groove after penetrating through the linkage groove 6411; a fourth limit plate 67 is fixedly mounted on the interlocking pin 634, and the fourth limit plate 67 is in sliding fit with the third limit 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 position-limiting groove 643, the push rod 64 is raised with a second position-limiting projection 681, and the third position-limiting plate 68 projection 681 is inserted into the fifth position-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 first connecting part 632 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, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims (10)

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 gear locking mechanism comprises a locking plate (62), a plug-in piece (63) and a push rod (64), the locking plate (62) is fixedly installed on the connecting piece (3), a plurality of gear clamping grooves are formed in the locking plate (62), the plug-in piece (63) is arranged on the chair back (4) in a left-right sliding mode, the plug-in piece (63) is connected with the gear clamping grooves in a plugging mode, the push rod (64) is in sliding fit with the chair back (4), the push rod (64) drives the plug-in piece (63) to slide left and right in a sliding mode, and therefore the plug-in piece (63) can be connected with the gear clamping grooves in a plugging mode, and the chair back (4) can be fixed at different heights; an air bag (7) with adjustable volume is arranged on the chair back (4), and the air bag (7) is used for supporting the waist of a human body.

2. A chair according to claim 1, wherein: be equipped with mount pad (61) on back of the chair (4), mount pad (61) are including supporting wall (611) and apron (612), supporting wall (611) is fixed on back of the chair (4), apron (612) fixed mounting is in supporting wall (611) rear end, apron (612) will support wall (611) rear side shutoff, connecting piece (3) are from inserting upwards between supporting wall (611) and apron (612), sliding groove (6121) have been seted up on apron (612), plug-in components (63) pass sliding groove (6121) and gear draw-in groove plug-in connection, plug-in components (63) and sliding groove (6121) sliding fit, push rod (64) are located mount pad (61) left side or right side.

3. A chair according to claim 2, wherein: 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), the third connecting portion (637) is arranged on the front end of the second connecting portion (636), the connecting head portion (631) and the fixture block portion (633) are inserted into the sliding groove (6121), and when the connecting head portion (631) slides in the sliding groove (6121) in the left-right direction, the fixture block portion (631) and the gear can be connected with the gear in a plugging-and-pulling mode.

4. A chair according to claim 3, wherein: the rear side of the cover plate (612) is fixedly provided with a first limiting plate (66), the first limiting plate (66) is provided with a first limiting groove which is through from left to right, and the first connecting part (632) penetrates through the first limiting groove and is in sliding fit with the first limiting groove.

5. A chair according to claim 3, wherein: the top of the push rod (64) is provided with a protruding linkage part (641), the cross section of the linkage part (641) is smaller than that of the push rod (64), the third connecting part (637) is located on the front side or the rear side of the linkage part (641), the linkage part (641) is provided with an inclined linkage groove (6411), the third connecting part (637) is fixedly provided with a linkage pin (634), and the linkage pin (634) penetrates through the linkage groove (6411) and is in sliding fit.

6. A chair according to claim 5, 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 limiting plate (65) are run through to the direction about the second spacing groove, and linkage portion (641) of push rod (64) are from upwards inserting the second spacing inslot and both sliding fit down.

7. A chair according to claim 6, wherein: the third limiting groove is formed in the second limiting plate (65), the second limiting plate (65) penetrates through the front and back direction of the third limiting groove, the linkage pin (634) penetrates through the third limiting groove, the linkage pin (634) and the third limiting groove are in left-right sliding fit, a fourth limiting plate (67) is fixedly mounted on the linkage pin (634), and the fourth limiting plate (67) and the second limiting plate (65) are in sliding fit.

8. A chair according to claim 2, wherein: a third limiting plate (68) is fixed on the chair back (4), the third limiting plate (68) is located on the left side of the push rod (64), a fourth limiting groove (642) is formed in the push rod (64) in a recessed mode, and the third limiting plate (68) is in sliding fit with the fourth limiting groove (642).

9. A chair according to claim 8, wherein: the push rod (64) is sunken to be provided with a fifth limiting groove (643), the push rod (64) is raised to be provided with a second limiting protrusion (681), 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).

10. A chair according to claim 1, wherein: also comprises an inflation ball and an exhaust valve which are used for controlling the air bag.

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