CN113647769A

CN113647769A - Chair with waist support

Info

Publication number: CN113647769A
Application number: CN202110866105.5A
Authority: CN
Inventors: 王江林; 刘磊; 王宗文
Original assignee: Henglin Home Furnishings Co Ltd
Current assignee: Henglin Home Furnishings Co Ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2021-11-16
Anticipated expiration: 2041-07-29
Also published as: CN113647769B

Abstract

The invention discloses a chair with a waist rest, which comprises chair legs, a chair seat, a chair back and a waist rest assembly, wherein the chair seat is arranged on the chair legs, the chair back is arranged on the chair seat, and the waist rest assembly is arranged on the chair back; the chair back comprises a left main beam, a right main beam, a first cross beam, a second cross beam and a third cross beam, the bottom ends of the left main beam and the right main beam are installed on the chair seat, the lumbar support component comprises a lumbar support piece, a sliding piece, a fixing piece, a first lock tongue piece, a second lock tongue piece and a switch component, and the fixing piece is fixedly installed in the middle parts of the third cross beam and the second cross beam; this technical scheme both can the simultaneous control first spring bolt spare back-and-forth movement and the removal of second spring bolt spare through a switch module, further makes can the simultaneous control waist lean on a back-and-forth movement and reciprocate, can carry out the regulation of upper and lower direction and the regulation on the fore-and-aft direction to the waist lean on the piece simultaneously promptly.

Description

Chair with waist support

Technical Field

The invention relates to the technical field of office furniture, in particular to a chair with a waist rest.

Background

At present, the daily live time of seat is longer, and ordinary seat is sat the waist and can be tired after a specified time, and along with the user to healthy importance higher and higher, current scheme adds the waist at the backrest and leans on usually, makes the user waist obtain supporting when using the seat, alleviates fatigue.

In the initial development process, the lumbar support is usually fixed on the seat back, and the shape of the corresponding support structure is fixed, and the body types of users are different, so that the support effect on the lumbar during use is different from person to person, and the comfort of the users cannot be ensured.

Chinese patent documents CN2680116Y, CN201360765Y, CN206453574U, etc. all disclose a seat back capable of lifting up and down; however, with the further improvement of the living quality requirements of people, the waist support which can only be adjusted up and down cannot meet the requirements of people.

Thus, chinese patent documents CN204169399U, CN207565735U, CN208957322U, and CN210842303U all disclose a lumbar support that can be adjusted up and down and back and forth.

However, the lumbar support capable of being adjusted up and down and back and forth achieves the purpose through the matching of the independent up and down adjusting structure and the independent back and forth adjusting structure, and the lumbar support has the following defects:

1) the independent up-down adjusting structure and the independent front-back adjusting structure lead the number of parts to be more, the structure to be not simple enough and the cost of the waist rest or the headrest to be high;

2) in the adjusting process, the up-down adjustment is required to be completed through the up-down adjusting structure, and the front-back adjustment is required to be completed through the front-back adjusting structure; i.e. at least two adjustment steps are required, the overall adjustment process is not convenient enough.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide a chair with a lumbar support, in which an up-down adjustment structure and a front-back adjustment structure of the lumbar support are organically combined together, so that the number of components is reduced, the structure is simple, and the upper-down adjustment and the front-back adjustment of the lumbar support can be simultaneously performed, thereby the overall adjustment process is convenient.

In order to achieve the purpose, the invention adopts the following technical scheme:

a chair with a lumbar support comprises a chair seat, a chair back and a lumbar support assembly, wherein the chair back is arranged on the chair seat, and the lumbar support assembly is arranged on the chair back or the chair seat; the waist rest assembly comprises a waist rest piece, a sliding piece, a fixing piece, a first lock tongue piece, a second lock tongue piece and a switch assembly, wherein the fixing piece is fixedly arranged on the chair back or the chair seat, and a plurality of first gear parts are arranged on the fixing piece in the vertical direction; the sliding part is arranged on the fixed part in a vertically sliding mode, the lumbar support part is arranged on the sliding part in a front-back sliding mode, the lumbar support part is positioned in front of the chair back and the fixed part, a plurality of second gear parts are arranged on the lumbar support part in the front-back direction, and the first bolt piece and the second bolt piece are movably arranged on the sliding part;

in the process of sliding the sliding part up and down, the first latch piece can be respectively matched with a plurality of first gear parts on the fixed part, so that the sliding part has a plurality of stopping positions with different heights; in the process of sliding the lumbar support back and forth, the second bolt piece can be respectively matched with a plurality of second gear parts on the lumbar support so that the lumbar support has a plurality of different stop positions in the front and back direction;

the switch component is used for controlling the first bolt piece to move out of and move into the first gear part, the first bolt piece can force the second bolt piece to move out of the second gear part in the process that the first bolt piece moves out of the first gear part, and the first bolt piece can force the second bolt piece to move into the second gear part in the process that the first bolt piece moves into the first gear part; or the switch component is used for controlling the second bolt piece to move out of the second gear part and forcing the first bolt piece to move out of the first gear part in the process of moving the second bolt piece out of the second gear part, and the second bolt piece can forcing the first bolt piece to move into the first gear part in the process of moving the second bolt piece into the second gear part.

Preferably, a first long hole is formed in the first bolt piece, a second long hole is formed in the sliding piece, an inclined included angle is formed between the first long hole and the second long hole, and the second bolt piece is located in the first long hole and the second long hole.

Preferably, the lumbar support comprises an arc-shaped frame, a connecting part and a sliding part, wherein the connecting part is integrally formed with the middle part of the arc-shaped frame and divides the arc-shaped frame into a left frame and a right frame, the sliding part is located in the middle part of the connecting part and behind the connecting part, the sliding part and the sliding part are both of a hollow structure, the second gear parts are located on the sliding part, the sliding part is sleeved on the sliding part, and the first locking tongue part is located inside the sliding part and can move back and forth in the sliding part.

Preferably, the upper portion wall of sliding part is equipped with the third slot hole, the third slot hole includes parallel distribution's first inside wall and second inside wall, be equipped with a plurality of evenly distributed's first bellying on the first inside wall, the interval between the top wall of first bellying and the second inside wall can hold second spring bolt spare and pass around, the recess that the inside wall cooperation of one or two first bellyings and third slot hole formed is second gear portion promptly.

Preferably, the sliding part is further provided with a first elastic arm, the first elastic arm is positioned on the lower wall of the sliding part, and the movable end of the first elastic arm is provided with a second protruding part protruding downwards;

a plurality of third gear parts are arranged on the lower wall of the sliding part in the front-back direction, the third gear parts correspond to the second gear parts one by one, and the second protruding parts on the first elastic arms can move into the third gear parts respectively in the front-back sliding process of the waist rest; and when the second lug boss is positioned in the third gear part, the movement of the second bolt piece in the second long hole is not blocked by the first lug boss.

Preferably, the fixed part is provided with a left sliding groove and a right sliding groove which are symmetrical, the upper end of each sliding groove is an open end, and the lower end of each sliding groove is a closed end;

the rear end of the sliding piece extends to the left side and the right side to form two sliding plates, and the two sliding plates are respectively matched with the two sliding grooves, so that the sliding piece is installed on the fixed piece in a mode of sliding up and down.

Preferably, the plurality of first shift portions are located between the two slide grooves; and a third boss part is arranged on the rear end face of the first bolt piece, and when the first bolt piece is located at the locking position, the third boss part is located in the first gear part and can be abutted against the upper inner side wall and the lower inner side wall of the through hole.

Preferably, the sliding part is further provided with a second elastic arm, the second elastic arm is located on the rear end face of the sliding part, the movable end of the second elastic arm is provided with a fourth protruding portion protruding backwards, and the fourth protruding portion can be respectively matched with the plurality of first gear portions on the fixing part in the up-and-down movement process of the sliding part.

Preferably, the switch assembly is mounted on the lumbar support, and the switch assembly pulls the first latch piece or the second latch piece to move so as to be separated from the locking position.

Preferably, the switch assembly comprises a switch member, a steel wire rope, a rubber sleeve and a return spring, the switch member is movably mounted on the waist rest member, the rubber sleeve is mounted on the steel wire rope in a sleeved mode, the outer end of the rubber sleeve is fixed on the waist rest member, the inner end of the rubber sleeve is fixed on the sliding member, the outer end of the steel wire rope extends out of the rubber sleeve and then is connected with the switch member, the inner end of the steel wire rope extends out of the rubber sleeve and then is connected with the first lock tongue member, and the return spring is mounted between the sliding member and the first lock tongue member and can force the first lock tongue member to move forwards or has a forward movement tendency;

wherein, when the lumbar support is positioned at the foremost end, the rubber sleeve is in an untensioned state.

The invention has the beneficial effects that:

1) the first bolt piece and the second bolt piece can be controlled to move back and forth and move through the switch assembly, so that the waist support piece can be controlled to move back and forth and up and down simultaneously, and the waist support piece can be adjusted in the up-down direction and the front-back direction simultaneously;

2) the upper and lower adjusting structure and the front and back adjusting structure of the waist support piece are organically combined together, so that the number of parts is reduced, and the structure is simpler.

Drawings

FIG. 1 is a first schematic structural view of a lumbar support assembly of the present invention;

FIG. 2 is a second schematic structural view of the lumbar support assembly of the present invention;

figure 3 is an exploded view of the lumbar support assembly of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 2 at A;

FIG. 5 is a first schematic structural view of a slider according to the present invention;

FIG. 6 is a second schematic structural view of a slider according to the present invention;

figure 7 is a first schematic structural view of the lumbar support of the present invention;

FIG. 8 is a second schematic structural view of the lumbar support of the present invention;

FIG. 9 is a first schematic structural view of the first latch member of the present invention;

FIG. 10 is a second schematic structural view of the first latch member of the present invention;

FIG. 11 is a schematic view of the fastener of the present invention;

FIG. 12 is a schematic view of a chair according to the present invention;

fig. 13 is a partial enlarged view of fig. 1 at B.

Description of reference numerals: 101. a lumbar support; 102. a slider; 103. a fixing member; 104. a first latch member; 105. a second latch member; 1030. a first gear portion; 1010. a second gear portion; 1040. a first long hole; 1020. a second long hole; 1011. an arc-shaped frame; 1012. a connecting portion; 1013. a sliding part; 10130. a third long hole; 10131. a first boss portion; 1021. a first resilient arm; 1022. a second boss portion; 10132. a third gear portion; 10133. a fourth long hole; 1031. a sliding groove; 1023. a sliding plate; 1041. a third boss portion; 1024. a second resilient arm; 1025. a fourth boss; 106. a switch member; 107. a wire rope; 108. a rubber sleeve; 109. a return spring; 1060. a handle portion; 1061. a first mounting portion; 10110. a fifth long hole; 1026. a second mounting portion; 1027. a first channel; 10111. a third mounting portion; 10112. a second channel; 1042. a first tongue-locking portion; 1043. a second latch portion; 10113. a first accommodating groove; 10120. a second accommodating groove; 10121. and (7) a cover plate.

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.

In the present invention, the recognition of the orientation of a person sitting normally on the chair is taken as the criterion, i.e. in the present application, the fixing member is located behind the lumbar support.

The first embodiment is as follows:

as shown in fig. 12, a chair with a lumbar support comprises chair legs, a chair seat, a chair back and a lumbar support assembly, wherein the chair seat is mounted on the chair legs, the chair back is mounted on the chair seat, and the lumbar support assembly is mounted on the chair back or the chair seat;

the lumbar support assembly shown in fig. 1-4 comprises a lumbar support member 101, a sliding member 102, a fixing member 103, a first latch piece 104, a second latch piece 105 and a switch assembly, wherein the fixing member 103 is used for being fixedly connected with a chair back or a chair seat, and a plurality of first gear portions 1030 are arranged on the fixing member 103 in the vertical direction; the slider 102 is attached to the fixed member 103 so as to be vertically slidable, the lumbar support 101 is attached to the slider 102 so as to be slidable back and forth and is positioned in front of the fixed member 103, the lumbar support 101 has a plurality of second shift portions 1010 arranged in the front-rear direction, the first latch piece 104 is attached to the slider 102 so as to be slidable, and the second latch piece 105 is attached to the slider 102 so as to be slidable;

during the up-and-down sliding process of the sliding member 102, the first latch piece 104 can respectively cooperate with the first shift portions 1030 on the fixed member 103, so that the sliding member 102 has a plurality of stop positions with different heights; and during the back-and-forth sliding of the lumbar support 101, the second latch piece 105 can respectively cooperate with the plurality of second shift portions 1010 on the lumbar support 101 so that the lumbar support 101 has a plurality of different stop positions in the back-and-forth direction;

the switch assembly has a first state and a second state, and when the switch assembly is in the first state, the lumbar support 101 can move back and forth and up and down; when the switch assembly is in the second state, the slide 102 is locked to the stationary member 103 and the lumbar support 101 is locked to the slide 102.

As shown in fig. 1 and 3, the switch assembly is used to control the first latch member 104 to move out of the first shift portion 1030, and the first latch member 104 can force the second latch member 105 to move out of the second shift portion 1010 during the first latch member 104 moves out of the first shift portion 1030, and the first latch member 104 can force the second latch member 105 to move into the second shift portion 1010 during the first latch member 104 moves into the first shift portion 1030.

Of course, in other embodiments, the switch assembly can be used to control the second latch member 105 to move out of the second shift position 1010, and the second latch member 105 can force the first latch member 104 to move out of the first shift position 1030 during the process of moving the second latch member 105 out of the second shift position 1010, and the second latch member 105 can force the first latch member 104 to move into the first shift position 1030 during the process of moving the second latch member 105 into the second shift position 1010.

In this way, the first latch piece 104 and the second latch piece 105 can be controlled to move back and forth and move back and forth at the same time through one switch assembly, so that the lumbar support 101 can be controlled to move back and forth and up and down at the same time, that is, the lumbar support 101 can be adjusted in the up-down direction and in the front-back direction at the same time;

in addition, the up-down adjusting structure and the front-back adjusting structure of the lumbar support 101 are organically combined together, so that the number of parts is reduced, and the structure is simpler.

In the present embodiment, as shown in fig. 3, 5, 6, 9 and 10, a first long hole 1040 is provided on the upper wall and/or the lower wall of the first latch piece 104, a second long hole 1020 is provided on the upper wall and/or the lower wall of the sliding piece 102, an inclined angle is formed between the first long hole 1040 and the second long hole 1020, and the second latch piece 105 is located in the first long hole 1040 and the second long hole 1020; thus, the movement of the first latch piece 104 in the front-back direction can drive the second latch piece 105 to move on the sliding piece 102, and of course, the movement of the second latch piece 105 on the sliding piece 102 can also drive the first latch piece 104 to move in the front-back direction.

In order to better match the first slot 1040 and the second slot 1020, the upper wall and the lower wall of the first latch piece 104 are preferably planar walls, the upper wall and the lower wall of the sliding piece 102 are preferably planar walls, and the second latch piece 105 is a cylindrical structure.

In order to make the carrying between the first locking tongue member 104 and the second locking tongue member 105 smoother and more appropriate, the inclined angle formed between the first elongated hole 1040 and the second elongated hole 1020 is in the range of 30 ° to 60 °, preferably 45 °. Specifically, as shown in fig. 3, the angle between the first long hole 1040 and the vertical plane in the front-rear direction is 45 degrees, and the second long hole 1020 is in the left-right direction, that is, the second latch piece 105 slides left and right on the sliding piece 102; this is provided so that the second latch member 105 can be more easily engaged with the second gear portions 1010 of the lumbar support 101.

In the present embodiment, as shown in fig. 7 and 8, the lumbar support 101 includes an arc-shaped frame 1011, a connecting portion 1012 and a sliding portion 1013, the connecting portion 1012 is connected to a middle portion of the arc-shaped frame 1011 and divides the arc-shaped frame 1011 into two frames, the sliding portion 1013 is located at the middle portion of the connecting portion 1012 and is located behind the connecting portion 1012, the sliding portion 1013 and the sliding member 102 are hollow structures, an upper wall and a lower wall of the sliding portion 1013 are both planar walls, the plurality of second shift portions 1010 are located on an upper wall of the sliding portion 1013, the sliding portion 1013 is installed on the sliding member 102 in a sleeved manner, and the first locking tongue 104 is located inside the sliding member 102 and abuts against the upper wall and the lower wall of the sliding member 102; therefore, the structure of the waist rest assembly is more compact, and the occupied space is smaller; of course, in other embodiments, it is also possible that the sliding part 1013 is inside the sliding member 102 and the first latch piece 104 is inside the sliding part 1013.

More preferably, the slide unit 1013 and the slider 102 are each of a square tube structure.

Further preferably, as shown in fig. 4, an upper wall of the sliding portion 1013 is provided with a third long hole 10130, the third long hole 10130 includes a first inner side wall and a second inner side wall which are distributed in parallel, the first inner side wall is provided with a plurality of first protrusions 10131 which are distributed uniformly, a distance between a top wall of the first protrusion 10131 and the second inner side wall can accommodate the second latch piece 105 to pass through, and a groove formed by one to two first protrusions 10131 and the inner side wall of the third long hole 10130 is the second position shifting portion 1010. Thus, the second latch piece 105 is located at the locking position, that is, the second latch piece 105 is located in the second shift position, and the lumbar support 101 cannot slide back and forth on the sliding member 102 due to the blocking of the inner side walls of the first protrusion 10131 and the third long hole 10130; when the switch assembly drives the first latch piece 104 to move backward, the first latch piece 104 can force the second latch piece 105 to move toward the second inner side wall and disengage from the first protrusion 10131, so that the second latch piece 105 can move forward and backward in the gap between the top of the first protrusion 10131 and the second inner side wall, and then the lumbar support 101 can freely move forward and backward on the sliding piece 102.

Further preferably, a top wall of the first protrusion 10131 is smoothly transited to a front sidewall of the first protrusion 10131, and a top wall of the first protrusion 10131 is smoothly transited to a rear sidewall of the first protrusion 10131.

As shown in fig. 4, a first inner side wall of the third long hole 10130 is a left side wall of the third long hole 10130, and a second inner side wall of the third long hole 10130 is a right side wall of the third long hole 10130.

It is worth to be noted here that the front and rear side walls of the third long hole 10130 can be used to limit the range of the lumbar support 101 moving forward and backward; and a fourth long hole 10133 having the same structure as the third long hole 10130 may be provided on the lower wall of the sliding part 1013, but the third long hole 10130 is a through hole and the fourth long hole 10133 is a blind hole; thereby ensuring that the second latch piece 105 does not fall off; of course, the lower wall of the sliding part 1013 may not be provided with any hole.

In this embodiment, as shown in fig. 5 and fig. 6, the slider 102 is further provided with a first elastic arm 1021, the first elastic arm 1021 is located on the lower wall of the slider 102, and a movable end of the first elastic arm 1021 is provided with a second protrusion 1022 protruding downward;

a plurality of third shift portions 10132 are arranged on the lower wall of the sliding portion 1013 in the front-back direction, the third shift portions 10132 correspond to the second shift portions 1010 one by one, and the second protrusions 1022 on the first elastic arm 1021 can move into the plurality of third shift portions 10132 respectively during the front-back sliding process of the lumbar support 101; and when the second protrusion 1022 moves into the third gear portion 10132, the movement of the second latch 105 in the second long hole 1020 is not blocked by the first protrusion 10131.

The third gear portion 10132 may be a through hole and a blind hole, and may also be a groove with a structure similar to that of the second gear portion 1010.

With this arrangement, when the first latch piece 104 and the second latch piece 105 are both located at the locking position, the engagement between the second protrusion 1022 on the first elastic arm 1021 and the third shift portion 10132 can assist the engagement between the second latch piece 105 and the second shift portion 1010 to lock the lumbar support 101 on the sliding member 102; when the first latch piece 104 and the second latch piece 105 are not located at the locking position, the second protrusion 1022 on the first elastic arm 1021 and the third shift portion 10132 cooperate to enable the lumbar support 101 to be adjusted in a first shift and a second shift during the front-back adjustment process, and enable each shift to be adjusted in a shift sense, so that the rider can conveniently position the lumbar support 101 in the front-back sliding process on the sliding member 102, and the second latch piece 105 is prevented from being blocked by the first protrusion 10131 during the movement to the locking position.

In this embodiment, as shown in fig. 11, the fixing member 103 is provided with two symmetrical sliding grooves 1031, an upper end of the sliding groove 1031 is an open end, and a lower end of the sliding groove 1031 is a closed end;

the rear end of the slider 102 extends to the left and right to form two sliding plates 1023, and the two sliding plates 1023 are respectively matched with the two sliding grooves 1031 so that the slider 102 is mounted on the fixed member 103 in a manner of being capable of sliding up and down.

Thus, the upper end of the sliding groove 1031 is an open end, which facilitates the mounting and dismounting of the slider 102; the lower end of the slide groove 1031 is a closed end, which prevents the slider 102 from falling out downward.

The first shift portion 1030 may be a through hole and a blind hole, and may also be a groove with a structure similar to that of the second shift portion 1010. In the present embodiment, as shown in the figure, the first shift portion 1030 is a through hole, and the plurality of first shift portions 1030 are located between two sliding grooves 1031; a third boss 1041 is arranged on the rear end surface of the first latch piece 104, and when the first latch piece 104 is located at the locking position, the third boss 1041 is located in the first shift portion 1030, i.e., the through hole, and can abut against the upper inner side wall and the lower inner side wall of the through hole; thereby achieving the purpose of limiting the up-and-down movement of the sliding member 102 and the lumbar support member 101.

In this embodiment, as shown in fig. 5 and fig. 6, the sliding member 102 is further provided with a second elastic arm 1024, the second elastic arm 1024 is located on the rear end surface of the sliding member 102, the movable end of the second elastic arm 1024 is provided with a fourth protruding portion 1025 protruding backward, and during the up-and-down movement of the sliding member 102, the fourth protruding portion 1025 can be respectively engaged with the plurality of first positioning portions 1030 on the fixing member 103.

With this arrangement, when the first latch piece 104 and the second latch piece 105 are both located at the locking position, the engagement between the fourth protrusion 1025 of the second elastic arm 1024 and the first shift portion 1030 can assist the engagement between the first latch piece 104 and the first shift portion 1030 to lock the sliding member 102 on the fixing member 103; when the first latch piece 104 and the second latch piece 105 are not located at the locking position, the fourth protrusion 1025 on the second elastic arm 1024 and the first shift portion 1030 are matched to enable the slider 102 to be adjusted in the up-down adjustment process, so that the slider can be adjusted in one shift and one shift, and each shift can be adjusted in the process, and finally, a rider can conveniently position the slider 102 in the up-down sliding manner on the fixing member 103, thereby preventing the first latch piece 104 from being not accurately matched with the first shift portion 1030 and being clamped in the process of moving to the locking position.

As shown in fig. 1, the switch assembly is mounted on the lumbar support 101 so that the switch assembly is accessible to an occupant seated in the chair, thereby adjusting the position of the lumbar support 101 according to the occupant's real-time experience.

The switch assembly pulls the first latch piece 104 or the second latch piece 105 to move out of the locking position through the brake cable structure. This is so because the switch assembly is mounted on the lumbar support 101, and during the forward movement of the lumbar support 101, the distance between the switch assembly and the first and second latch pieces 104 and 105 will also increase, and at this time, if the first or second latch pieces 104 and 105 are controlled by the cable only, the first and second latch pieces 104 and 105 will not return to the locking position; therefore, in the embodiment, the brake cable structure is arranged to avoid the phenomenon; specifically, as shown in fig. 1, 3 and 13, the switch assembly includes a switch member 106, a steel cable 107, a rubber sleeve 108 and a return spring 109, the switch member 106 is movably mounted on the lumbar support member 101, the rubber sleeve 108 is mounted on the steel cable 107 in a sleeved manner, an outer end of the rubber sleeve 108 is fixed on the lumbar support member 101, an inner end of the rubber sleeve 108 is fixed on the sliding member 102, an outer end of the steel cable 107 extends out of the rubber sleeve 108 and is connected with the switch member 106, an inner end of the steel cable 107 extends out of the rubber sleeve 108 and is connected with the first latch member 104, and the return spring 109 is mounted between the sliding member 102 and the first latch member 104 and can force the first latch member 104 to move forward or have a tendency to move forward;

wherein, when the lumbar support 101 is positioned at the most front end, the rubber sleeve 108 is in an untensioned state.

Thus, the position difference between the back and forth movement of the lumbar support 101 and the first latch piece 104 is compensated by the extension and closure of the rubber sleeve 108, i.e. the rubber sleeve 108 and the wire rope 107 do not have force transmission function in the process; meanwhile, the inner hole of the rubber sleeve 108 is actually used as a track for the movement of the steel wire rope 107, and the switch member 106 drives the steel wire rope 107 to move, so that the steel wire rope 107 can only move along the inner hole of the rubber sleeve 108, and then can have a force transmission effect, and the first lock tongue member 104 is pulled to move forwards.

The switch 106 can be installed on the lumbar support 101 in a rotating manner and a sliding manner; in the present embodiment, as shown in fig. 1 and 3, the switch member 106 is slidably mounted on the arc-shaped frame 1011; specifically, as shown in fig. 12, the switch element 106 includes a handle portion 1060 and a first mounting portion 1061 fixedly connected by a fastener, a fifth long hole 10110 is provided on the arc-shaped frame 1011, the handle portion 1060 is located at the rear side of the arc-shaped frame 1011, the first mounting portion 1061 is located at the front side of the arc-shaped frame 1011, two upper and lower first grooves are formed between the handle portion 1060 and the first mounting portion 1061, the two first grooves are in clearance fit with the upper and lower side walls of the fifth long hole 10110, and the outer end of the steel wire rope 107 is fixedly connected with the first mounting portion 1061.

It should be noted here that the "fixing" of the outer end of the rubber sleeve 108 to the lumbar support 101 and the inner end of the rubber sleeve 108 to the sliding member 102 includes both the actual fixed connection formed by embedding, clamping or other means, and the fixing means formed by the outer end of the rubber tube always abutting against the lumbar support 101 and the inner end of the rubber tube always abutting against the sliding member 102 through the tension of the rubber tube itself; specifically, as shown in fig. 5, 6, 7 and 8, a second mounting part 1026 is provided inside the sliding member 102, a first channel 1027 for passing the steel cable 107 and blocking the rubber tube is provided on the second mounting part 1026, and the inner end of the rubber tube is always abutted against the second mounting part 1026; a third installation part 10111 is arranged on the arc-shaped frame 1011 of the waist rest 101, and a second channel 10112 which can allow the steel wire rope 107 to pass and block the rubber pipe from passing is arranged on the third installation part 10111; the outer end of the rubber tube always offsets with the third installation portion 10111.

Wherein; the first channel 1027 and the second channel 10112 may be grooves or through holes with notches.

As shown in fig. 9 and 10, the first latch member 104 is an L-shaped block, and includes a first latch portion 1042 and a second latch portion 1043 that are integrally formed and perpendicular to each other, the third protrusion 1041 is located on a rear end surface of the first latch portion 1042, the first long hole 1040 is located in a front half section of the second latch portion 1043, a channel capable of accommodating a rubber tube is formed between the second latch portion 1043 and an inner side wall of the slider 102, and an inner end of the wire rope 107 is connected to the first latch portion 1042; the return spring 109 is positioned between the first latch portion 1042 and the second mounting portion 1026.

Since the first mounting part 1061, the third mounting part 10111 and the rubber tube are mounted on the front side of the lumbar support 101, the first mounting part 1061, the third mounting part 10111 and the rubber tube are prevented from being pressed against a passenger in the daily use; as shown in fig. 7, 8 and 13, a first receiving groove 10113 is formed on the arc frame 1011, a second receiving groove 10120 is formed on the connecting portion 1012, and the first receiving groove 10113 is communicated with the second receiving groove 10120; the first installation part 1061 and the third installation part 10111 are both located in the first receiving groove 10113, and the rubber tube is partially located in the first receiving groove 10113 and partially located in the second receiving groove 10120; still more preferably; in order to avoid the rubber tube from being arched forward to be out of the range of the first receiving groove 10113 and the second receiving groove 10120 during the back and forth movement of the lumbar support 101; a cover plate 10121 is further arranged, and the cover plate 10121 is positioned on the connecting part 1012; the left end and the right end of the cover plate 10121 are respectively integrally formed with the left side wall and the right side wall of the second accommodating groove 10120; so that the rubber tube can move only left and right at the portion of the second receiving groove 10120.

It should be noted that, during the daily use, the arc-shaped frame 1011 is further wrapped with at least one layer of flexible member, which can buffer the seat occupant from the arc-shaped frame 1011 and cover the first receiving groove 10113 and the second receiving groove 10120 on the arc-shaped frame 1011.

In an embodiment of the present invention, the specific adjustment process for the lumbar support 101 is as follows:

the switch assembly is in a second state under the action of the return spring 109, at this time, the third protrusion 1041 is located in the first shift portion 1030, and the second latch 105 is located in the second shift portion 1010, i.e. close to the first inner sidewall; i.e. the slide 102 is locked to the fixing member 103 and the lumbar support 101 is locked to the slide 102.

The switch 106 is rotated or pulled to pull the wire rope 107 to move along the rubber sleeve 108 to pull the first latch 104 to move backwards, so that the third protrusion 1041 moves out of the first position 1030, and at the same time, the second latch 105 is forced to move from the first inner sidewall to the second inner sidewall to move out of the second position 1010, that is, the switch assembly enters the first state from the second state by rotating or pulling the switch 106, and after the switch assembly enters the second state, the lumbar support 101 can move back and forth and up and down, and during the back and forth movement of the lumbar support 101, the second latch 105 can move back and forth in the gap between the top wall of the first protrusions 10131 and the second inner sidewall.

When the switch member 106 is released, the switch assembly enters the second state from the first state under the action of the return spring 109, and the first latch 104 moves forward, so that the third protrusion 1041 moves into the first shift portion 1030, and at the same time, the second latch 105 is forced to move from the second inner sidewall to the first inner sidewall to move into the second shift portion 1010.

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. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A chair with a lumbar support comprises a chair seat, a chair back and a lumbar support assembly, wherein the chair back is arranged on the chair seat, and the lumbar support assembly is arranged on the chair back or the chair seat; it is characterized in that;

the lumbar support assembly comprises a lumbar support piece (101), a sliding piece (102), a fixing piece (103), a first lock tongue piece (104), a second lock tongue piece (105) and a switch assembly, wherein the fixing piece (103) is fixedly arranged on a chair back or a chair seat, and a plurality of first gear parts (1030) are arranged on the fixing piece (103) in the vertical direction; the sliding piece (102) is mounted on the fixed piece (103) in a vertically sliding mode, the lumbar support piece (101) is mounted on the sliding piece (102) in a front-back sliding mode, the lumbar support piece (101) is positioned in front of the chair back and the fixed piece (103), the lumbar support piece (101) is provided with a plurality of second gear parts (1010) in the front-back direction, and the first latch piece (104) and the second latch piece (105) are movably mounted on the sliding piece (102);

during the up-and-down sliding process of the sliding part (102), the first latch piece (104) can be respectively matched with a plurality of first gear parts (1030) on the fixed part (103) so that the sliding part (102) has a plurality of stopping positions with different heights; and during the back-and-forth sliding of the lumbar support (101), the second latch piece (105) can respectively cooperate with a plurality of second gear parts (1010) on the lumbar support (101) so that the lumbar support (101) has a plurality of different stop positions in the back-and-forth direction;

the switch component is used for controlling the first latch piece (104) to move into the first gear part (1030) and the first latch piece (104) can force the second latch piece (105) to move out of the second gear part (1010) during the process that the first latch piece (104) moves out of the first gear part (1030), and the first latch piece (104) can force the second latch piece (105) to move into the second gear part (1010) during the process that the first latch piece (104) moves into the first gear part (1030); alternatively, the switch assembly is used for controlling the second latch piece (105) to move out of the second gear portion (1010), the second latch piece (105) can force the first latch piece (104) to move out of the first gear portion (1030) in the process that the second latch piece (105) moves out of the second gear portion (1010), and the second latch piece (105) can force the first latch piece (104) to move into the first gear portion (1030) in the process that the second latch piece (105) moves into the second gear portion (1010).

2. The chair with the lumbar support according to claim 1, wherein the first latch member (104) is provided with a first slot (1040), the sliding member (102) is provided with a second slot (1020), an inclined angle is formed between the first slot (1040) and the second slot (1020), and the second latch member (105) is positioned in the first slot (1040) and the second slot (1020).

3. A chair with a lumbar support according to claim 1, characterized in that the lumbar support (101) comprises an arc-shaped frame (1011), a connecting part (1012) and a sliding part (1013) which are integrally formed, the connecting part (1012) is connected with the middle part of the arc-shaped frame (1011) and divides the arc-shaped frame (1011) into a left frame and a right frame, the sliding part (1013) is located at the middle part of the connecting part (1012) and behind the connecting part (1012), the sliding part (1013) and the sliding member (102) are both hollow structures, the plurality of second shift parts (1010) are located on the sliding part (1013), the sliding part (1013) is sleeved on the sliding member (102), and the first locking tongue piece (104) is located inside the sliding member (102) and can move back and forth in the sliding member (102).

4. A chair with a lumbar support according to claim 3, wherein the upper wall of the sliding part (1013) is provided with a third long hole (10130), the third long hole (10130) comprises a first inner side wall and a second inner side wall which are distributed in parallel, the first inner side wall is provided with a plurality of first protrusions (10131) which are distributed uniformly, the distance between the top wall of the first protrusions (10131) and the second inner side wall can accommodate the second locking tongue piece (105) to pass back and forth, and the groove formed by the matching of one or two first protrusions (10131) and the inner side wall of the third long hole (10130) is the second position shifting part (1010).

5. A chair with a lumbar support according to claim 4, wherein the slider (102) is further provided with a first elastic arm (1021), the first elastic arm (1021) is located on the lower wall of the slider (102), and the movable end of the first elastic arm (1021) is provided with a second protrusion (1022) protruding downwards;

a plurality of third gear parts (10132) are arranged on the lower wall of the sliding part (1013) in the front-back direction, the third gear parts (10132) correspond to the second gear parts (1010) one by one, and the second protrusions (1022) on the first elastic arm (1021) can move into the plurality of third gear parts (10132) respectively in the front-back sliding process of the lumbar support (101).

6. The chair with the lumbar support according to claim 1, wherein the fixing member (103) is provided with two symmetrical sliding grooves (1031) at left and right sides, the upper ends of the sliding grooves (1031) are open ends, and the lower ends of the sliding grooves (1031) are closed ends;

the rear end of the sliding piece (102) extends to the left and the right to form two sliding plates (1023), and the two sliding plates (1023) are respectively matched with the two sliding grooves (1031) so that the sliding piece (102) can be installed on the fixed piece (103) in a vertically sliding mode.

7. A chair with a lumbar support according to claim 6, characterized in that the slider (102) is further provided with a second resilient arm (1024), the second resilient arm (1024) is located at the rear end surface of the slider (102), the movable end of the second resilient arm (1024) is provided with a fourth protrusion (1025) protruding backwards, and the fourth protrusion (1025) can be respectively engaged with the first shift portions (1030) of the fixing member (103) during the up-and-down movement of the slider (102).

8. A chair with a lumbar support according to claim 1, wherein the sliding member (102) is further provided with a second resilient arm (1024), the second resilient arm (1024) is located at the rear end surface of the sliding member (102), the movable end of the second resilient arm (1024) is provided with a fourth protrusion (1025) protruding backward, and the fourth protrusion (1025) can be respectively engaged with the first shift portions (1030) of the fixing member (103) during the up-and-down movement of the sliding member (102).

9. A chair with a lumbar support according to claim 1, characterized in that the switch assembly comprises a switch member (106), a wire rope (107), a rubber sleeve (108) and a return spring (109), the switch piece (106) is movably arranged on the waist rest piece (101), the rubber sleeve (108) is sleeved on the steel wire rope (107), the outer end of the rubber sleeve (108) is fixed on the lumbar support (101), the inner end of the rubber sleeve (108) is fixed on the sliding part (102), the outer end of the steel wire rope (107) is connected with the switch piece (106) after being moved out of the rubber sleeve (108), the inner end of the steel wire rope (107) is connected with the first lock tongue piece (104) after being moved out of the rubber sleeve (108), the return spring (109) is arranged between the sliding piece (102) and the first latch piece (104) and can force the first latch piece (104) to move forwards or has a forward movement tendency;

wherein the rubber sleeve (108) is in an untensioned state when the lumbar support (101) is at the foremost end.

10. A chair with a lumbar support as claimed in claim 1, wherein the slider (102) is provided with a second mounting portion (1026) inside, the second mounting portion (1026) is provided with a first passage (1027) for the cable (107) and for blocking the rubber tube, and the inner end of the rubber tube abuts against the second mounting portion (1026); a third installation part (10111) is arranged on the arc-shaped frame (1011) of the waist rest piece, and a second channel (10112) which can be used for a steel wire rope (107) to pass through and blocking a rubber pipe to pass through is arranged on the third installation part (10111); the outer end of the rubber tube is abutted to the third installation part (10111).