CN113498944B - Chair and supporting mechanism thereof - Google Patents

Abstract

The invention discloses a chair and a supporting mechanism thereof, wherein the chair comprises a supporting piece, a sliding piece, a fixing piece, a first spring bolt piece, a second spring bolt piece and a switch component, wherein the fixing piece is provided with a plurality of first gear parts in the up-down direction; the sliding part is arranged on the fixed part in a manner of being capable of sliding up and down, the supporting part is arranged on the sliding part in a manner of being capable of sliding back and forth and positioned in front of the fixed part, the supporting part is provided with a plurality of second gear parts in a front-back direction, the first spring bolt piece is arranged on the sliding part in a manner of being capable of sliding, and the second spring bolt piece is arranged on the sliding part in a manner of being capable of sliding; the switch assembly is mounted on the support; 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 support piece can be controlled to move back and forth and move up and down simultaneously, namely, the support piece can be adjusted in the up-down direction and the front-back direction simultaneously.

Description

Chair and supporting mechanism thereof

Technical Field

The invention relates to the technical field of office furniture, in particular to a chair and a supporting mechanism thereof.

Background

At present, the daily service life of seat is longer, and waist and head can be tired after ordinary seat sits for a long time, along with the user's importance is higher and higher to healthy, current scheme usually adds waist and headrest at the seat back, makes the user obtain the support at waist and head when using the seat, alleviates tired.

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

Chinese patent documents with publication number CN2728831Y, CN2772499Y, CN200977878Y and the like disclose seat headrest capable of lifting up and down, and Chinese patent documents with publication number CN2680116Y, CN201360765Y, CN206453574U and the like disclose seat lumbar support capable of lifting up and down; however, with further improvement of life quality requirements of people, only up-and-down adjustment of the seat headrest and the lumbar support cannot meet the demands of people.

Thus, the method comprises the steps of; the Chinese patent document with publication number of CN212382376U discloses a headrest, which is additionally provided with a supporting device on the basis that the headrest can be adjusted up and down, and the supporting device can adjust the headrest in the front-back direction; and chinese patent publication No. CN204169399U, CN207565735U, CN208957322U, CN210842303U, etc., all disclose a lumbar support capable of up-down and back-and-forth adjustment.

However, the lumbar support or headrest 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 rear adjusting structure, and the lumbar support or headrest has the following disadvantages:

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 above problems, the present invention aims to overcome the disadvantages of the prior art, and provides a chair and a support mechanism thereof, wherein the support mechanism can be used as a headrest and a lumbar support, and simultaneously, an up-down adjusting structure and a front-back adjusting structure in the support mechanism are organically combined together, thereby saving the number of parts, simplifying the structure, and simultaneously adjusting up-down and front-back adjusting 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 supporting mechanism comprises a supporting piece for leaning on the back or the head of a human body, a sliding piece, a fixing piece and a switch assembly, wherein the sliding piece is arranged on the fixing piece in a manner of being capable of sliding up and down, the supporting piece is arranged on the sliding piece in a manner of being capable of sliding back and forth and is positioned in front of the fixing piece,

the switch assembly has a first state and a second state, and the support member can move back and forth and up and down when the switch assembly is in the first state; when the switch assembly is in the second state, the slider is locked to the fixed member and the support member is locked to the slider.

Preferably, the sliding device further comprises a first spring bolt member and a second spring bolt member movably mounted on the sliding member, wherein the fixed member is provided with a plurality of first gear parts in the up-down direction, and the supporting member is provided with a plurality of second gear parts in the front-back direction;

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

the switch assembly can simultaneously control the first spring bolt piece and the second spring bolt piece to move, and when the first spring bolt piece moves out of the first gear part, the second spring bolt piece can simultaneously move out of the second gear part in the process that the switch assembly enters the first state from the second state; and in the process that the switch assembly enters the second state from the first state, the first spring bolt piece can move into the second gear part at the same time when moving into the first gear part.

Preferably, the first tongue member is capable of forcing the second tongue member to move when the first tongue member moves; alternatively, the second latch member can force the first latch member to move as the second latch member moves.

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 support member includes an integrally formed arc frame, a connecting portion and a sliding portion, the connecting portion is connected with a middle portion of the arc frame and divides the arc frame into a left frame and a right frame, the sliding portion is located at the middle portion of the connecting portion and located at the rear of the connecting portion, the sliding portion and the sliding member are of hollow structures, the plurality of second gear positions are located on the sliding portion, the sliding portion is sleeved and arranged on the sliding member, and the first lock tongue member is located inside the sliding member and can move back and forth in the sliding member.

Preferably, a third long hole is respectively arranged on two opposite side walls of the sliding part, a second long hole is respectively distributed on two opposite side walls of the sliding part, the middle part of the second spring bolt piece is positioned in the first long hole, and two ends of the second spring bolt piece pass through the two second long holes and then are positioned in the two third long holes.

Preferably, 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 space between the top wall of the first protruding part and the second inner side wall can accommodate the front and back passing of the second spring bolt, and a groove formed by matching one or two of the first protruding parts with the inner side wall of the third long hole is the second gear part;

the second spring bolt piece moves from the first inner side wall to the second inner side wall to move out of the second gear part in the process that the switch assembly enters the first state from the second state, and can move back and forth in gaps between top walls of the first protruding parts and the second inner side wall in the process that the support piece moves back and forth;

during the process of the switch assembly entering the second state from the first state, the second lock tongue piece moves from the second inner side wall to the first inner side wall so as to move into the second gear 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 respectively matched with the two sliding grooves so that the sliding piece can be arranged on the fixing piece in an up-and-down sliding manner;

the first gear parts are blind holes or through holes and are positioned between the two sliding grooves; at least one third protruding part is arranged on the rear end face of the first spring bolt piece;

during the switch assembly moving from the second state to the first state, the first latch member moves rearward to move the third lobe out of the first gear position,

during the switch assembly from the first state to the second state, the first latch member moves forward to move the third boss into the first gear 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 supporting piece, the rubber sleeve is sleeved and arranged on the steel wire rope, the outer end of the rubber sleeve is fixed on the supporting piece, 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;

the switch assembly can be in a second state or enter the second state from the first state under the action of the reset spring;

pulling the wire rope through the switch member can cause the switch assembly to enter the first state from the second state.

A chair comprising a support mechanism as described above.

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, and further the support piece can be controlled to move back and forth and move up and down, namely, the 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 of the supporting piece and the front-back adjusting structure 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 supporting mechanism according to the present invention;

FIG. 2 is a schematic diagram of a supporting mechanism according to a second embodiment of the present invention;

FIG. 3 is an exploded view of the support mechanism 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 support member according to the present invention;

FIG. 8 is a schematic diagram of a second embodiment of the support member 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 partial enlarged view at B in fig. 1.

Reference numerals illustrate: 101. a 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 recognition of the orientation of a person sitting normally on the chair is taken into account, i.e. in the present application the fixing element is located behind the support element.

Embodiment one:

a support mechanism as shown in figures 1-4 may be located above the seat back to act as a headrest to support the head of the occupant; and may also be positioned in the middle portion of the seat back to act as a lumbar support and thereby provide support to the lumbar region of the occupant.

The supporting mechanism comprises a supporting 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 used for being fixedly connected with a chair back or a chair seat, and a plurality of first gear parts 1030 are arranged on the fixing piece 103 in the up-down direction; the sliding member 102 is slidably mounted on the fixing member 103, the supporting member 101 is slidably mounted on the sliding member 102 in front of the fixing member 103, the supporting member 101 is arranged with a plurality of second gear parts 1010 in the front-rear 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 forward and backward sliding of the supporting member 101, the second latch member 105 can be respectively engaged with the plurality of second gear parts 1010 on the supporting member 101 so that the supporting member 101 has a plurality of different stay positions in the forward and backward direction;

the switch assembly has a first state and a second state, and the support 101 can move back and forth and up and down when the switch assembly is in the first state; when the switch assembly is in the second state, the slider 102 is locked to the fixed member 103 and the support member 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 bolt 104 can be controlled to move back and forth and the second latch bolt 105 can be controlled to move up and down through one switch assembly, so that the support piece 101 can be controlled to move back and forth and move up and down at the same time, that is, the support piece 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-rear adjusting structure of the supporting member 101 are organically combined together, 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 support member 101.

In this embodiment, as shown in fig. 7 and 8, the supporting member 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 gear 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 structure of the supporting mechanism is more compact, and the occupied space is smaller; 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 supporting member 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 long hole 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 support member 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 here that the front side wall and the rear side wall of the third elongated hole 10130 can be used to limit the range of forward and backward movement of the 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 move into the plurality of third gear parts 10132 respectively during the front-rear sliding of the supporting member 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 and mount the support member 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 protrusion 1022 on the first elastic arm 1021 and the third gear 10132 are matched to enable the support member 101 to be adjusted in a front-back adjustment process, so that the support member can be adjusted in a first gear and a first gear, and a gear feel can be achieved in each adjustment process, and finally, a user can conveniently position the support member 101 in a front-back sliding manner on the sliding member 102, so that the second bolt member 105 is prevented from being blocked by the first protrusion 10131 in a moving process to 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 restricting the up-and-down movement of the slider 102 and the 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 support 101 so that an occupant can sit on the chair to gain access to the switch assembly, thereby enabling the position of the support 101 to be adjusted according to his/her own real-time experience.

The switch assembly pulls either the first latch member 104 or the second latch member 105 to move out of the locked position. This is because the switch assembly is mounted on the support member 101, and the spacing between the switch assembly and the first latch member 104 and the second latch member 105 increases during the forward movement of the support member 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 12, the switch assembly comprises a switch member 106, a steel wire rope 107, a rubber sleeve 108 and a return spring 109, wherein the switch member 106 is movably mounted on the support member 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 support member 101, the inner end of the rubber sleeve 108 is fixed on the sliding member 102, the outer end of the steel wire rope 107 extends out of the rubber sleeve 108 and then is connected with the switch member 106, the inner end of the steel wire rope 107 extends out of the rubber sleeve 108 and then is connected with the first lock tongue 104, and the return spring 109 is mounted between the sliding member 102 and the first lock tongue 104 and can force the first lock tongue 104 to move forwards or has a forward moving trend;

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

In this way, the difference in position between the forward and backward movement of the support 101 and the first tongue member 104 is compensated for by the extension and closure of the rubber sleeve 108, i.e. during this process, the rubber sleeve 108 and the wire rope 107 do not have a force transmitting effect; 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 106 can be mounted on the support 101 in a rotary manner and in a sliding manner; 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" in which the outer end of the rubber sleeve 108 is fixed to the supporting member 101 and the inner end of the rubber sleeve 108 is fixed to the sliding member 102 includes both a virtually fixed connection formed by embedding, clamping, or other means, and a fixed means formed by the outer end of the rubber tube always abutting against the supporting member 101 and the inner end of the rubber tube always abutting against the sliding member 102 by the tension action of the rubber tube itself; 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 supporting member 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 support 101, the first mounting portion 1061, the third mounting portion 10111, and the rubber tube are kept against the occupant in order to avoid the usual use; as shown in fig. 7, 8 and 12, 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; in order to avoid the rubber tube from being arched forward to escape from the range of the first and second receiving grooves 10113 and 10120 during the forward and backward movement of the 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 supporting member 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 slide 102 is locked to the fixed part 103 and the support 101 is locked to the slide 102.

Rotating or pulling the switch member 106 to pull the wire rope 107 to move along the rubber sleeve 108 to pull the first latch member 104 to move backward, thereby moving the third protrusion 1041 out of the first gear 1030 and simultaneously forcing the second latch member 105 to move from the first inner sidewall to the second inner sidewall to move out of the second gear 1010, i.e. rotating or pulling the switch member 106 causes the switch assembly to enter the first state from the second state, and when the switch assembly enters the second state, the support member 101 can move back and forth and up and down, and during the back and forth movement of the support member 101, the second latch member 105 can move back and forth in the gap between the top walls of the plurality of first protrusions 10131 and the second inner sidewall.

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.

A chair comprising a support mechanism as described above.

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 (8)

1. A supporting mechanism is characterized by comprising a supporting piece (101) for leaning on the back or the head of a human body, a sliding piece (102), a fixing piece (103) and a switch assembly, wherein the sliding piece (102) is arranged on the fixing piece (103) in a manner of being capable of sliding up and down, the supporting piece (101) is arranged on the sliding piece (102) in a manner of being capable of sliding back and forth and is positioned in front of the fixing piece (103),

the switch assembly has a first state and a second state, and the support (101) is capable of moving back and forth and up and down when the switch assembly is in the first state; when the switch assembly is in the second state, the slider (102) is locked to the fixed member (103) and the support member (101) is locked to the slider (102);

the sliding piece (102) is also provided with a first spring bolt piece (104) and a second spring bolt piece (105) which are movably arranged on the sliding piece;

the switch assembly is capable of simultaneously controlling the movement of the first latch member (104) and the second latch member (105);

the switch assembly comprises a switch piece (106), a steel wire rope (107), a rubber sleeve (108) and a return spring (109), wherein the switch piece (106) is movably arranged on a supporting piece (101), the rubber sleeve (108) is sleeved and arranged on the steel wire rope (107), the outer end of the rubber sleeve (108) is fixed on the supporting piece (101), the inner end of the rubber sleeve (108) is fixed on a sliding piece (102), the outer end of the steel wire rope (107) is connected with the switch piece (106) after extending out of the rubber sleeve (108), the inner end of the steel wire rope (107) is connected with a first spring bolt piece (104) after extending out of the rubber sleeve (108), and the return spring (109) is arranged between the sliding piece (102) and the first spring bolt piece (104) and can force the first spring bolt piece (104) to move forwards or has a forward moving trend.

Wherein the switch assembly is capable of being in a second state or entering the second state from the first state under the action of a return spring (109);

pulling the wire rope (107) through the switch member (106) can bring the switch assembly from the second state into the first state.

2. A support mechanism according to claim 1, wherein said fixing member (103) has a plurality of first gear parts (1030) arranged in the up-down direction, and said support member (101) has a plurality of second gear parts (1010) arranged in the front-back direction;

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) so that the sliding piece (102) has a plurality of stay positions with different heights; and during the forward and backward sliding of the support member (101), the second tongue member (105) can be respectively engaged with a plurality of second gear parts (1010) so that the support member (101) has a plurality of different stay positions in the forward and backward direction;

during the switch assembly enters the first state from the second state, the first lock tongue piece (104) can move out of the second gear part (1010) simultaneously when moving out of the first gear part (1030); and during the switch assembly moving from the first state to the second state, the first latch member (104) is capable of moving into the second gear portion (1010) simultaneously with the second latch member (105) moving into the first gear portion (1030).

3. A support mechanism according to claim 2, wherein the first tongue member (104) is capable of forcing the second tongue member (105) to move when the first tongue member (104) moves; alternatively, the second tongue member (105) can force the first tongue member (104) to move as the second tongue member (105) moves.

4. The supporting mechanism according to claim 2, 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).

5. The supporting mechanism according to claim 2, wherein the supporting member (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 a 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 a middle portion of the connecting portion (1012) and located at a rear portion 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 and mounted on the sliding member (102), and the first latch member (104) is located inside the sliding member (102) and can move back and forth inside the sliding member (102).

6. The supporting mechanism according to claim 5, wherein a third long hole (10130) is formed on two opposite side walls of the sliding part (1013), a second long hole (1020) is formed on two opposite side walls of the sliding part (102), a middle portion of the second latch member (105) is located in the first long hole (1040), and two ends of the second latch member (105) pass through the two second long holes (1020) and are located in the two third long holes (10130).

7. The supporting mechanism according to claim 6, wherein the third long hole (10130) comprises a first inner side wall and a second inner side wall which are distributed in parallel, a plurality of first protruding portions (10131) which are distributed uniformly are arranged on the first inner side wall, a space between a top wall of the first protruding portion (10131) and the second inner side wall can accommodate the second bolt member (105) to pass back and forth, and a groove formed by matching one or two of the first protruding portions (10131) with the inner side wall of the third long hole (10130) is the second gear portion (1010);

the second latch member (105) moves from the first inner side wall to the second inner side wall to move out of the second gear position part (1010) during the process of the switch assembly moving from the second state to the first state, and the second latch member (105) can move back and forth in a gap between the top wall and the second inner side wall of the plurality of first protruding parts (10131) during the back and forth movement of the support member (101);

during the switch assembly moving from the first state to the second state, the second latch member (105) moves from the second inner side wall to the first inner side wall to move into the second gear portion (1010).

8. A supporting mechanism according to claim 3, wherein 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 respectively matched with the two sliding grooves (1031) so that the sliding piece (102) can be installed on the fixing piece (103) in an up-and-down sliding mode;

the first gear parts (1030) are blind holes or through holes and are positioned between the two sliding grooves (1031); at least one third protruding part (1041) is arranged on the rear end surface of the first lock tongue piece (104);

during the switch assembly from the second state to the first state, the first latch member (104) moves rearward to move the third boss (1041) out of the first gear position (1030),

during the switch assembly from the first state to the second state, the first latch member (104) moves forward to move the third boss (1041) into the first gear (1030).