CN113647769B

CN113647769B - Chair with waist rest

Info

Publication number: CN113647769B
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: 2023-12-22
Anticipated expiration: 2041-07-29
Also published as: CN113647769A

Abstract

The invention discloses a chair with a waist rest, which comprises chair legs, a chair seat, a chair back and a waist rest component, wherein the chair seat is arranged on the chair legs, the chair back is arranged on the chair seat, and the waist rest component 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, wherein the bottom ends of the left main beam and the right main beam are arranged on a chair seat, the lumbar support component comprises a lumbar support component, a sliding component, a fixing component, a first spring bolt component, a second spring bolt component and a switch component, and the fixing component is fixedly arranged at the middle parts of the third cross beam and the second cross beam; according to the technical scheme, the first bolt piece can be controlled to move back and forth and the second bolt piece can be controlled to move through the switch assembly, so that the waist support piece can be controlled to move back and forth and move up and down simultaneously, namely, the waist support piece can be adjusted in the up-down direction and the front-back direction simultaneously.

Description

Chair with waist rest

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 service life of the seat is longer, the waist can be tired after the ordinary seat sits for a long time, along with the higher and higher importance of users on health, the waist is usually added to the seat back to the current scheme, makes the user obtain the support when using the seat, alleviates tired.

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

Chinese patent documents with publication number CN2680116Y, CN201360765Y, CN206453574U, etc., all disclose seat lumbar support that can be lifted up and down; however, with further improvement of life quality requirements of people, the lumbar support which can be adjusted up and down only cannot meet the demands of people.

Thus, chinese patent documents, such as CN204169399U, CN207565735U, CN208957322U, CN210842303U, disclose lumbar support capable of being adjusted up and down and back and forth.

However, the lumbar support capable of being adjusted up and down and up and down is achieved by the cooperation of an independent up and down adjusting structure and a front and back adjusting structure, and the lumbar support has the following defects:

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

2) In the adjusting process, the up-down adjustment is needed to be completed through the up-down adjusting structure, and the front-back adjustment is needed to be completed through the front-back adjusting structure; that is, at least two adjusting steps are needed, and the whole adjusting process is inconvenient.

Disclosure of Invention

In order to solve the problems, the invention aims to overcome the defects of the prior art and provide a chair with a lumbar support, wherein an up-down adjusting structure and a front-back adjusting structure of the lumbar support are organically combined together, so that the number of parts is saved, the structure is simple, and the lumbar support can be adjusted up and down and front and back simultaneously, so that the whole adjusting process is convenient enough.

In order to achieve the above purpose, the present 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 support component comprises a waist support piece, a sliding piece, a fixing piece, a first lock tongue piece, a second lock tongue piece and a switch component, wherein the fixing piece is fixedly arranged on a chair back or a chair seat, and a plurality of first gear parts are arranged in the vertical direction of the fixing piece; the sliding piece is arranged on the fixed piece in a manner of being capable of sliding up and down, the waist support piece is arranged on the sliding piece in a manner of being capable of sliding back and forth, the waist support piece is positioned in front of the chair back and the fixed piece, a plurality of second gear parts are arranged on the waist support piece in the front-back direction, and the first lock tongue piece and the second lock tongue piece are movably arranged on the sliding piece;

in the up-and-down sliding process of the sliding piece, the first spring bolt piece can be respectively matched with a plurality of first gear parts on the fixing piece, so that the sliding piece has a plurality of stay positions with different heights; the second lock tongue piece can be respectively matched with a plurality of second gear parts on the waist support piece in the front-back sliding process of the waist support piece so that the waist support piece has a plurality of different stay positions in the front-back direction;

the switch component is used for controlling the first spring bolt to move out of and into the first gear part, and in the process of moving out of the first gear part, the first spring bolt can force the second spring bolt to move out of the second gear part, and in the process of moving in the first gear part, the first spring bolt can force the second spring bolt to move in the second gear part; alternatively, the switch assembly is configured to control the second locking bolt member to move out of and into the second gear portion, and the second locking bolt member is configured to force the first locking bolt member out of the first gear portion during movement of the second locking bolt member out of the second gear portion, and the second locking bolt member is configured to force the first locking bolt member into the first gear portion during movement of the second locking bolt member into the second gear portion.

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

Preferably, the lumbar support comprises an integrally formed arc-shaped frame, a connecting part and a sliding part, wherein the connecting part is connected 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 positioned at the middle part of the connecting part and positioned at the rear of the connecting part, the sliding part and the sliding part are of hollow structures, a plurality of second gear positions are positioned on the sliding part, the sliding part is sleeved and arranged on the sliding part, and the first spring bolt part is positioned inside the sliding part and can move back and forth in the sliding part.

Preferably, the upper wall of the sliding part is provided with a third long hole, the third long hole comprises a first inner side wall and a second inner side wall which are distributed in parallel, a plurality of first protruding parts which are distributed uniformly are arranged on the first inner side wall, the distance between the top wall of each first protruding part and the second inner side wall can accommodate the front and back passing of the second lock tongue piece, and a groove formed by matching one or two first protruding parts with the inner side wall of the third long hole is the second gear part.

Preferably, the sliding piece is further provided with a first elastic arm, the first elastic arm is positioned on the lower wall of the sliding piece, 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 are in one-to-one correspondence with the second gear parts, and the second protruding parts on the first elastic arms can respectively move into the plurality of third gear parts in the front-back sliding process of the lumbar support; and when the second protruding part is positioned in the third gear part, the movement of the second lock tongue piece in the second long hole is not blocked by the first protruding part.

Preferably, the fixing piece is provided with two symmetrical sliding grooves, 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 and right sides to form two sliding plates, and the two sliding plates are matched with the two sliding grooves respectively so that the sliding piece can be installed on the fixing piece in an up-and-down sliding mode.

Preferably, the plurality of first gear positions are located between two sliding grooves; the rear end face of the first spring bolt piece is provided with a third protruding portion, and when the first spring bolt piece is located at the locking position, the third protruding portion is located in the first gear portion and can be abutted against the upper inner side wall and the lower inner side wall of the through hole.

Preferably, the sliding piece is further provided with a second elastic arm, the second elastic arm is located on the rear end face of the sliding piece, 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 first gear portions on the fixing piece in the vertical movement process of the sliding piece.

Preferably, the switch assembly is mounted on the lumbar support, the switch assembly pulling the first or second latch member to move out of the latched position.

Preferably, the switch assembly comprises a switch piece, a steel wire rope, a rubber sleeve and a return spring, wherein the switch piece is movably arranged on the lumbar support, the rubber sleeve is sleeved and arranged on the steel wire rope, the outer end of the rubber sleeve is fixed on the lumbar support, the inner end of the rubber sleeve is fixed on the sliding piece, the outer end of the steel wire rope extends out of the rubber sleeve and then is connected with the switch piece, the inner end of the steel wire rope extends out of the rubber sleeve and then is connected with the first spring bolt piece, and the return spring is arranged between the sliding piece and the first spring bolt piece and can force the first spring bolt piece to move forwards or has a trend of moving forwards;

wherein, when the waist rest is positioned at the forefront end, the rubber sleeve is in an un-tightened state.

The beneficial effects of the invention are as follows:

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

2) The up-down adjusting structure and the front-back adjusting structure of the waist rest are organically combined together, so that the number of parts is reduced, and the structure is simpler.

Drawings

FIG. 1 is a schematic view of a lumbar support assembly according to the present invention;

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

FIG. 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 schematic diagram of a slider according to the present invention;

FIG. 6 is a schematic diagram of a second embodiment of a slider according to the present invention;

FIG. 7 is a schematic view of a lumbar support according to the present invention;

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

FIG. 9 is a schematic view of a first latch member according to 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 a fixing member according to the present invention;

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

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

Reference numerals illustrate: 101. a lumbar support; 102. a slider; 103. a fixing member; 104. a first tongue member; 105. a second tongue member; 1030. a first gear portion; 1010. a second gear portion; 1040. a first long hole; 1020. a second long hole; 1011. a curved frame; 1012. a connection part; 1013. a sliding part; 10130. a third long hole; 10131. a first boss; 1021. a first elastic arm; 1022. a second protruding portion; 10132. a third gear portion; 10133. a fourth long hole; 1031. a sliding groove; 1023. a sliding plate; 1041. a third boss; 1024. a second elastic arm; 1025. a fourth protruding portion; 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 latch portion; 1043. a second latch portion; 10113. a first accommodation groove; 10120. a second accommodation groove; 10121. and a cover plate.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

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

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the present invention, the position of a person sitting on the chair is known, i.e. in the present application, the fixing member is located at the rear of the lumbar support.

Embodiment one:

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 arranged on the chair legs, 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 lumbar support assembly as shown in fig. 1 to 4 comprises a lumbar support 101, a sliding member 102, a fixing member 103, a first latch member 104, a second latch member 105 and a switch assembly, wherein the fixing member 103 is fixedly connected with a chair back or a chair seat, and a plurality of first gear parts 1030 are arranged on the fixing member 103 in the up-down direction; the sliding member 102 is slidably mounted on the fixing member 103 up and down, the lumbar support member 101 is slidably mounted on the sliding member 102 back and forth and is positioned in front of the fixing member 103, the lumbar support member 101 is arranged with a plurality of second shift portions 1010 in the front-back direction, the first tongue member 104 is slidably mounted on the sliding member 102, and the second tongue member 105 is slidably mounted on the sliding member 102;

during the up-down sliding process of the sliding member 102, the first latch member 104 can respectively cooperate with the first gear parts 1030 on the fixing member 103, so that the sliding member 102 has a plurality of stay positions with different heights; and during the back and forth sliding of the lumbar support 101, the second latch member 105 can respectively cooperate with the second gear parts 1010 on the lumbar support 101 to enable the lumbar support 101 to have a plurality of different stay 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 slider 102 is locked to the fixed member 103 and the lumbar support 101 is locked to the slider 102.

As shown in fig. 1 and 3, the switch assembly is configured to control movement of the first latch member 104 out of and into the first gear portion 1030, and the first latch member 104 is configured to force the second latch member 105 out of the second gear portion 1010 during movement of the first latch member 104 out of the first gear portion 1030, and the first latch member 104 is configured to force the second latch member 105 into the second gear portion 1010 during movement of the first latch member 104 into the first gear portion 1030.

Of course, in other embodiments, the switch assembly may also be used to control the movement of the second latch member 105 out of the second gear portion 1010, and the second latch member 105 may be capable of forcing the first latch member 104 out of the first gear portion 1030 during movement of the second latch member 105 out of the second gear portion 1010, and the second latch member 105 may be capable of forcing the first latch member 104 into the first gear portion 1030 during movement of the second latch member 105 into the second gear portion 1010.

In this way, the first latch member 104 can be controlled to move back and forth and the second latch member 105 can be controlled to move up and down through one switch assembly, so that the lumbar support 101 can be controlled to move back and forth and move up and down at the same time, that is, the lumbar support 101 can be adjusted in the up and down direction and in the front and 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 this embodiment, as shown in fig. 3, 5, 6, 9 and 10, a first long hole 1040 is formed in the upper wall and/or the lower wall of the first latch member 104, a second long hole 1020 is formed in the upper wall and/or the lower wall of the sliding member 102, an inclined angle is formed between the first long hole 1040 and the second long hole 1020, and the second latch member 105 is located in the first long hole 1040 and the second long hole 1020; thus, the movement of the first latch member 104 in the front-rear direction can drive the second latch member 105 to move on the sliding member 102, and of course, the movement of the second latch member 105 on the sliding member 102 can also drive the first latch member 104 to move in the front-rear direction.

Wherein, in order to make the first long hole 1040 and the second long hole 1020 better fit, the upper wall and the lower wall of the first latch member 104 are preferably plane walls, the upper wall and the lower wall of the sliding member 102 are preferably plane walls, and the second latch member 105 is a cylindrical structure.

In order to make the driving between the first latch member 104 and the second latch member 105 smoother and more suitable, the inclined angle formed between the first long hole 1040 and the second long hole 1020 is in the range of 30 ° -60 °, preferably 45 °. Specifically, as shown in fig. 3, the angle between the first long hole 1040 and the vertical surface 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 member 105 slides left-right on the sliding member 102; this is provided so that the second tongue member 105 can more conveniently engage the second gear portions 1010 on the lumbar support 101.

In this embodiment, as shown in fig. 7 and 8, the lumbar support 101 includes an integrally formed 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 left and right frames, the sliding portion 1013 is located at a middle portion of the connecting portion 1012 and located at a rear of the connecting portion 1012, the sliding portion 1013 and the sliding member 102 are both 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 sleeved and mounted on the sliding member 102, and the first latch member 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 waist rest component is more compact in structure and occupies smaller space; of course, in other embodiments, it is also possible that the sliding part 1013 is located inside the sliding part 102 and the first tongue member 104 is located inside the sliding part 1013.

Further preferably, both the slider 1013 and the slider 102 have square tube structures.

Further preferably, as shown in fig. 4, the 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 that are distributed in parallel, the first inner side wall is provided with a plurality of first protruding portions 10131 that are distributed uniformly, a space between a top wall and the second inner side wall of the first protruding portions 10131 can accommodate the second locking bolt 105 to pass through, and a groove formed by one to two of the first protruding portions 10131 and the inner side wall of the third long hole 10130 is the second gear portion 1010. Thus, the second latch member 105 being in the locked position means that the second latch member 105 is located in the second gear position, and the lumbar support 101 cannot slide back and forth on the sliding member 102 due to the blocking of the first boss 10131 and the inner sidewall of the third slot 10130; when the switch assembly drives the first latch member 104 to move backward, the first latch member 104 can force the second latch member 105 to move toward the second inner sidewall and separate from the first protrusion 10131, so that the second latch member 105 can move forward and backward in the gap between the top of the first protrusion 10131 and the second inner sidewall, and then the lumbar support 101 can move forward and backward freely on the sliding member 102.

Further preferably, the top wall of the first boss 10131 smoothly transitions with the front side wall of the first boss 10131, and the top wall of the first boss 10131 smoothly transitions with the rear side wall of the first boss 10131.

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

It should be noted that the front side wall and the rear side wall of the third elongated hole 10130 can be used to limit the range of the back-and-forth movement of the lumbar support 101; 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 member 105 does not fall; of course, the lower wall of the slider 1013 may not have any hole.

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

a plurality of third gear parts 10132 are arranged on the lower wall of the sliding part 1013 in the front-rear direction, the third gear parts 10132 are in one-to-one correspondence with the second gear parts 1010, and the second protruding parts 1022 on the first elastic arms 1021 can respectively move into the plurality of third gear parts 10132 during the front-rear sliding process of the lumbar support 101; and when the second boss 1022 moves into the third gear 10132, the movement of the second latch member 105 in the second long hole 1020 is not blocked by the first boss 10131.

The third gear 10132 may be a through hole or a blind hole, or may be a groove similar to the second gear 1010.

So arranged, when the first latch member 104 and the second latch member 105 are both located at the locking position, the second protrusion 1022 on the first elastic arm 1021 cooperates with the third gear 10132 to assist the cooperation between the second latch member 105 and the second gear 1010 to lock the lumbar support 101 on the sliding member 102; when the first bolt member 104 and the second bolt member 105 are not located at the locking position, the second protruding portion 1022 on the first elastic arm 1021 and the third gear portion 10132 are matched, so that the lumbar support 101 can be adjusted in a first gear and a second gear in the front-back adjustment process, the adjustment process of each gear can have a gear feel, and finally, a user can conveniently position the lumbar support 101 by sliding back and forth on the sliding member 102, and the second bolt member 105 is prevented from being blocked by the first protruding portion 10131 in the movement process towards the locking position.

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

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

Thus, the upper end of the sliding groove 1031 is an open end, which is convenient for installing and detaching the sliding piece 102; the lower end of the slide groove 1031 is a closed end, and the slide 102 can be prevented from falling down.

The first gear portion 1030 may be a through hole or a blind hole, or may be a groove similar in structure to the second gear portion 1010. In this embodiment, as shown in the drawing, the first gear portion 1030 is a through hole, and the plurality of first gear portions 1030 are located between two sliding grooves 1031; a third protrusion 1041 is provided on the rear end surface of the first latch member 104, and when the first latch member 104 is located at the locking position, the third protrusion 1041 is located in the first gear 1030, i.e. the through hole, and can abut against the upper inner sidewall and the lower inner sidewall of the through hole; thereby achieving the purpose of limiting the up-and-down movement of the sliding member 102 and the lumbar support 101.

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

So configured, when first tongue member 104 and second tongue member 105 are both in the locked position, the engagement of fourth projection 1025 on second resilient arm 1024 with first gear portion 1030 can assist the engagement between first tongue member 104 and first gear portion 1030 to lock and mount slider 102 on mount 103; and when first spring bolt spare 104 and second spring bolt spare 105 are all not in the locked position, the cooperation of fourth bellying 1025 and first gear portion 1030 on the second elastic arm 1024 can make slider 102 adjust the in-process from top to bottom, can all have the gear sense for every in-process that shelves were adjusted, and finally can make things convenient for the passenger to slide from top to bottom on mounting 103 to slide slider 102 and fix a position, avoid first spring bolt spare 104 can not be accurate in the in-process of going to the locked position to cooperate with first gear portion 1030 and block.

As shown in fig. 1, the switch assembly is mounted on the lumbar support 101 so that an occupant can sit on the chair to gain access to the switch assembly, thereby enabling adjustment of the position of the lumbar support 101 according to his/her own real-time experience.

The switch assembly pulls the first or second latch member 104, 105 through the brake cable structure to move out of the locked position. This is because the switch assembly is mounted on the lumbar support 101, and the spacing between the switch assembly and the first and second latch members 104 and 105 increases during the forward movement of the lumbar support 101, and if the first latch member 104 or the second latch member 105 is controlled by the cable alone, the first latch member 104 and the second latch member 105 cannot return to the locked position; therefore, this phenomenon is avoided by providing the brake cable structure in this embodiment; specifically, as shown in fig. 1, 3 and 13, the switch assembly includes a switch member 106, a wire rope 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 sleeved on the wire rope 107, the outer end of the rubber sleeve 108 is fixed on the lumbar support member 101, the inner end of the rubber sleeve 108 is fixed on the sliding member 102, the outer end of the wire rope 107 extends out of the rubber sleeve 108 and then is connected with the switch member 106, the inner end of the wire rope 107 extends out of the rubber sleeve 108 and then 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 has a forward moving trend;

wherein the rubber sleeve 108 is in an unstrained state when the lumbar support 101 is located at the foremost end.

In this way, the difference between the back and forth movement of the lumbar support member 101 and the first tongue member 104 is compensated for by the extension and closure of the rubber sleeve 108, i.e., the rubber sleeve 108 and the wire rope 107 do not have a force transmitting effect during this process; meanwhile, the inner hole of the rubber sleeve 108 is actually a track used for moving the steel wire rope 107, and the switch piece 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 further has a force transmission function, and the first lock tongue piece 104 is pulled to move forwards.

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

It should be noted that "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 slider 102 includes both a virtually fixed connection by embedding, clamping or other means, and a fixed means formed by the tension of the rubber tube itself so that the outer end of the rubber tube always abuts against the lumbar support 101 and the inner end of the rubber tube always abuts against the slider 102; specifically, as shown in fig. 5, 6, 7 and 8, a second mounting portion 1026 is provided in the sliding member 102, a first channel 1027 through which the steel wire rope 107 can pass and through which the rubber tube can be blocked is provided on the second mounting portion 1026, and an inner end of the rubber tube is always abutted against the second mounting portion 1026; a third installation part 10111 is arranged on the arc-shaped frame 1011 of the waist support 101, and a second channel 10112 for allowing the steel wire rope 107 to pass and blocking the rubber tube to pass is arranged on the third installation part 10111; the outer end of the rubber tube always abuts against the third mounting 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 protruding portion 1041 is located on a rear end surface of the first latch portion 1042, the first long hole 1040 is located on 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 located between the first latch portion 1042 and the second mount portion 1026.

Since the first mounting portion 1061, the third mounting portion 10111, and the rubber tube are all mounted on the front side of the lumbar support 101, the first mounting portion 1061, the third mounting portion 10111, and the rubber tube are kept against the occupant during daily use; as shown in fig. 7, 8 and 13, the arc-shaped frame 1011 is provided with a first accommodating groove 10113, the connecting part 1012 is provided with a second accommodating groove 10120, and the first accommodating groove 10113 is communicated with the second accommodating groove 10120; the first mounting part 1061 and the third mounting part 10111 are both positioned in the first accommodating groove 10113, and the rubber tube is partially positioned in the first accommodating groove 10113 and partially positioned in the second accommodating groove 10120; even more preferred; to avoid the rubber tube arching forward to come out of the range of the first and second receiving grooves 10113 and 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 and right ends of the cover plate 10121 are respectively integrally formed with the left and right side walls of the second accommodating groove 10120; and thus the rubber tube can move only left and right at the portion of the second receiving groove 10120.

It should be noted that, during daily use, at least one layer of flexible member is further wrapped on the arc-shaped frame 1011, and the flexible member can not only play a role of buffering between the occupant and the arc-shaped frame 1011, but also cover the first receiving groove 10113 and the second receiving groove 10120 on the arc-shaped frame 1011.

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

the switch assembly is in the second state under the action of the return spring 109, at this time, the third protrusion 1041 is located in the first gear portion 1030, and the second latch member 105 is located in the second gear portion 1010, that is, close to the first inner side wall; i.e. the slider 102 is locked to the fixed part 103 and the lumbar support 101 is locked to the slider 102.

The switch member 106 is rotated or pulled to pull the wire rope 107 to move along the rubber sleeve 108 to pull the first latch member 104 to move backward, so that the third protrusion 1041 moves out of the first gear portion 1030 and simultaneously forces the second latch member 105 to move from the first inner side wall to the second inner side wall to move out of the second gear portion 1010, that is, the switch member 106 is rotated or pulled to make the switch assembly enter the first state from the second state, and when the switch assembly enters the second state, the lumbar support 101 can move back and forth and move up and down, and during the back and forth movement of the lumbar support 101, the second latch member 105 can move back and forth in the gap between the top walls of the first protrusions 10131 and the second inner side wall.

The switch member 106 is released, and the switch assembly is moved from the first state to the second state by the return spring 109, at this time, the first latch member 104 moves forward, and the third protrusion 1041 moves into the first gear portion 1030, and at the same time, the second latch member 105 is forced to move from the second inner sidewall to the first inner sidewall to move into the second gear portion 1010.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. 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 will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention. Any modification, equivalent replacement, improvement, etc. 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; the method is characterized in that;

the lumbar support assembly comprises a lumbar support (101), a sliding part (102), a fixing part (103), a first lock tongue piece (104), a second lock tongue piece (105) and a switch assembly, wherein the fixing part (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 part (103) in the up-down direction; the sliding piece (102) is arranged on the fixing piece (103) in a manner of being capable of sliding up and down, the lumbar support (101) is arranged on the sliding piece (102) in a manner of being capable of sliding back and forth, the lumbar support (101) is positioned in front of the chair back and the fixing piece (103), a plurality of second gear parts (1010) are arranged on the lumbar support (101) in the front-back direction, and the first lock tongue piece (104) and the second lock tongue piece (105) are movably arranged on the sliding piece (102);

during the up-and-down sliding process of the sliding piece (102), the first lock tongue piece (104) can be respectively matched with a plurality of first gear parts (1030) on the fixed piece (103) so that the sliding piece (102) has a plurality of stay positions with different heights; and in the process of sliding the lumbar support (101) forwards and backwards, the second lock tongue piece (105) can be respectively matched with a plurality of second gear parts (1010) on the lumbar support (101) so that the lumbar support (101) has a plurality of different stay positions in the front-back direction;

the switch assembly is used for controlling the first spring bolt piece (104) to move out of and move into the first gear part (1030), and the first spring bolt piece (104) can force the second spring bolt piece (105) to move out of the second gear part (1010) in the process of moving the first spring bolt piece (104) out of the first gear part (1030), and the first spring bolt piece (104) can force the second spring bolt piece (105) to move into the second gear part (1010) in the process of moving the first spring bolt piece (104) into the first gear part (1030); alternatively, the switch assembly is configured to control the second latch member (105) to move out of and into the second gear portion (1010), and the second latch member (105) is configured to force the first latch member (104) out of the first gear portion (1030) during movement of the second latch member (105) out of the second gear portion (1010), and the second latch member (105) is configured to force the first latch member (104) into the first gear portion (1030) during movement of the second latch member (105) into the second gear portion (1010).

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

3. The chair with lumbar support according to claim 1, wherein the lumbar support (101) comprises an integrally formed arc-shaped frame (1011), a connecting portion (1012) and a sliding portion (1013), the connecting portion (1012) is connected with the middle portion of the arc-shaped frame (1011) and divides the arc-shaped frame (1011) into a left frame and a right frame, the sliding portion (1013) is located at the middle portion of the connecting portion (1012) and located at the rear of the connecting portion (1012), the sliding portion (1013) and the sliding member (102) are both hollow structures, the plurality of second gear portions (1010) are located on the sliding portion (1013), the sliding portion (1013) is sleeved on the sliding member (102), and the first locking tongue (104) is located inside the sliding member (102) and can move back and forth inside the sliding member (102).

4. A chair with lumbar support according to claim 3, characterized in that 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 protruding parts (10131) which are distributed uniformly, the space between the top wall of the first protruding parts (10131) and the second inner side wall can accommodate the front and back passage of the second lock tongue piece (105), and the groove formed by the cooperation of one or two first protruding parts (10131) and the inner side wall of the third long hole (10130) is the second gear part (1010).

5. The chair with lumbar support according to claim 4, characterized in that said slider (102) is further provided with a first elastic arm (1021), said first elastic arm (1021) being located on the lower wall of the slider (102), the movable end of said first elastic arm (1021) being provided with a second protruding portion (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) are in one-to-one correspondence with the second gear parts (1010), and the second protruding parts (1022) on the first elastic arms (1021) can respectively move into the plurality of third gear parts (10132) in the front-back sliding process of the lumbar support (101).

6. The chair with lumbar support according to claim 1, characterized in that the fixing member (103) is provided with two symmetrical sliding grooves (1031) on the left and right, the upper end of the sliding groove (1031) is an open end, and the lower end of the sliding groove (1031) is a closed end;

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 matched with the two sliding grooves (1031) respectively so that the sliding piece (102) can be installed on the fixing piece (103) in an up-and-down sliding mode.

7. The chair with lumbar support according to claim 6, wherein the sliding member (102) is further provided with a second elastic arm (1024), the second elastic arm (1024) is located at a rear end face 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 the fourth protruding portion (1025) can be respectively engaged with the plurality of first gear portions (1030) on the fixing member (103) during the up-down movement of the sliding member (102).

8. The chair with lumbar support according to claim 1, wherein the sliding member (102) is further provided with a second elastic arm (1024), the second elastic arm (1024) is located at a rear end face 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 the fourth protruding portion (1025) can be respectively matched with the plurality of first gear portions (1030) on the fixing member (103) during the up-down movement of the sliding member (102).

9. The chair with 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), wherein the switch member (106) is movably mounted on the lumbar support (101), the rubber sleeve (108) is sleeved on the 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 member (102), the outer end of the wire rope (107) is connected with the switch member (106) after moving out of the rubber sleeve (108), the inner end of the wire rope (107) is connected with the first spring bolt member (104) after moving out of the rubber sleeve (108), and the return spring (109) is mounted between the sliding member (102) and the first spring bolt member (104) and can force the first spring bolt member (104) to move forwards or have a forward trend;

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

10. A chair with lumbar support according to claim 1, characterized in that said sliding member (102) has a second mounting portion (1026) inside, said second mounting portion (1026) being provided with a first passage (1027) for the passage of the wire rope (107) and for the passage of the rubber tube, the inner end of said rubber tube being in abutment with said second mounting portion (1026); a third installation part (10111) is arranged on the arc-shaped frame (1011) of the waist support, and a second channel (10112) which can be used for the passing of the steel wire rope (107) and the passing of the rubber tube is arranged on the third installation part (10111); the outer end of the rubber tube is abutted against the third mounting part (10111).