CN219594127U - Seat waist leaning adjusting mechanism - Google Patents

Abstract

The utility model relates to the technical field of seats and discloses a seat lumbar support adjusting mechanism which comprises a lumbar support frame and a support arm, wherein the upper side of the lumbar support frame is rotationally connected with a seat back support, one end of the support arm is rotationally connected with the lumbar support frame, and the other end of the support arm is in lifting positioning connection with the seat back support through a sliding block; wherein, the sliding block is provided with a stop block protruding forwards, and the waist support frame is provided with a stop groove matched with the stop block; the stop groove is internally provided with a plurality of groove positions, and the stop block is matched with different groove positions in the sliding process of the sliding block. Compared with the prior art, the seat lumbar support adjusting mechanism has the advantages that after the sliding block is adjusted in place, the sliding block is not easy to accidentally change and slide due to the action of the lumbar and back attaching force of a user, and the lumbar support locking effect is good.

Description

Seat waist leaning adjusting mechanism

Technical Field

The utility model relates to the technical field of seats, in particular to a seat lumbar support adjusting mechanism.

Background

Office chairs are an indispensable article for daily work and study of people. Common office chairs generally comprise a chair chassis, a lumbar support, a backrest, a headrest and other parts, and in order to improve the comfort of the lumbar support, the lumbar support of some office chairs in the prior art can rotate back and forth so as to match the sitting comfort of different people.

As an utility model patent with publication number CN217185374U, publication day 2022, month 08 and 16 and name of an adjustable seat back, the inventor previously devised, disclosed a back support comprising upper and lower swing support frames hinged with a back support seat respectively; the bottom of the lower swing support plate frame is provided with an upper swing support rod and a lower swing support rod, the upper swing support rod is hinged with a backrest support seat, the end part of the lower swing support rod is hinged with a lower slide block assembly, and the backrest support seat is provided with a sliding guide groove corresponding to the lower slide block assembly. The lower swing supporting plate frame has the characteristic of front-back rotation; however, the lower sliding block assembly can slide up and down, so that the lower sliding block assembly is difficult to lock against the waist when a human body is in contact with the lower sliding block assembly, and the positioning effect is not ideal.

Disclosure of Invention

The utility model aims to provide a seat lumbar support adjusting mechanism with a multi-gear adjusting function, good gear adjusting, difficult gear sliding and good lumbar support locking effect, which at least provides a beneficial selection or creation condition for solving one or more technical problems in the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme.

The seat lumbar support adjusting mechanism comprises a lumbar support frame and a supporting arm, wherein the upper side of the lumbar support frame is rotationally connected with a seat back support, one end of the supporting arm is rotationally connected with the lumbar support frame, and the other end of the supporting arm is in lifting positioning connection with the seat back support through a sliding block; wherein, the sliding block is provided with a stop block protruding forwards, and the waist support frame is provided with a stop groove matched with the stop block; the stop groove is internally provided with a plurality of groove positions, and the stop block is matched with different groove positions in the sliding process of the sliding block.

Compared with the prior art, the seat lumbar support adjusting mechanism has the advantages that after the sliding block is adjusted in place, the sliding block is not easy to accidentally change and slide due to the action of the lumbar and back attaching force of a user, and the lumbar support locking effect is good.

More preferably, the sliding block is of a three-gear sliding positioning structure, and correspondingly, three different slots are arranged in the stop slot; thereby ensuring that each gear can be stably propped against.

More preferably, the lumbar support frame is provided with lumbar support pads, the lumbar support frame and the lumbar support pads are arc-shaped pieces, and the lumbar support pads are positioned in the lumbar support frame and are unfolded left and right. The combined design of the lumbar support frame and the lumbar support pad enables the lumbar of a user to be very comfortable to lean against and can lift along with the backrest.

More preferably, an arc-shaped connecting rod is arranged at the back of the lumbar support frame, the connecting rod protrudes towards the rear side, and the supporting arm is rotatably connected with the middle part of the connecting rod. This has the best effect of abutment.

More preferably, the connecting rod is integrally formed in the middle of the lumbar support frame, and divides the enclosed space of the lumbar support frame into an upper region and a lower region.

More preferably, one end of the supporting arm is rotatably connected with the middle part of the bottom rod of the lumbar support frame.

More preferably, a backrest is mounted on the backrest support, the backrest is composed of an upper backrest and a lower backrest, and the lower side of the upper backrest is rotatably connected with the backrest support and provides a rotary reset force through an elastic reset piece; the upper side of the upper backrest is higher than the chair back bracket and is suspended. Therefore, the upper backrest can be tilted forwards and backwards at a certain angle, so that the back is more comfortable to attach.

More preferably, the elastic restoring member is an elastic steel sheet or a torsion spring.

More preferably, the backrest and the backrest support form a height-adjustable lifting connection, and the lumbar support frame and the support arm are connected with the backrest. The structure is simple, and the user can change the positions of the waist rest and the back rest according to different actual needs so as to match different comfort requirements of different users.

More preferably, the chair back support comprises a connecting support for connecting a chair seat and a lifting support which is installed on the connecting support in a lifting manner and has an adjustable height, and the backrest, the lumbar support frame and the supporting arm are all connected with the lifting support. When the chair is applied, the common adjustment of the back rest and the waist rest can be realized by adjusting the height of the lifting support, and the adjustment is simple and convenient.

More preferably, the chair back support comprises a connecting support for connecting a chair seat and a lifting support which is installed on the connecting support in a lifting manner and has an adjustable height, and the lumbar support frame and the supporting arm are connected with the lifting support.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic structural view of a seat lumbar adjusting mechanism according to embodiment 1 of the present utility model.

Fig. 2 shows a partial enlarged view of fig. 1.

Fig. 3 is a schematic diagram of an assembly structure of the slider and the stop groove.

Fig. 4 is a schematic view showing the assembly of the lumbar support frame and the back support frame.

Fig. 5 is a schematic view of an assembled structure of the backrest.

Reference numerals illustrate.

1: lumbar support frame, 2: support arm, 3: chair back support, 4: slider, 5: lumbar support pad, 6: and (5) backing.

1-1: stop groove, 1-2: and a connecting rod.

3-1: connecting bracket, 3-2: lifting support.

4-1: and a stop block.

6-1: upper back rest, 6-2: lower back, 6-3: and an elastic steel sheet.

Detailed Description

The following description of the specific embodiments of the present utility model is further provided with reference to the accompanying drawings, so that the technical scheme and the beneficial effects of the present utility model are more clear and definite. The embodiments described below are exemplary by referring to the drawings for the purpose of illustrating the utility model and are not to be construed as limiting the utility model.

Example 1

Referring to fig. 1 and 2, a seat lumbar support adjusting mechanism comprises a lumbar support frame 1 and a support arm 2, wherein the upper side of the lumbar support frame 1 is rotatably connected with a seat back support 3, one end of the support arm 2 is rotatably connected with the lumbar support frame 1, and the other end of the support arm 2 is in lifting positioning connection with the seat back support 3 through a sliding block 4.

As shown in fig. 3, a stopper 4-1 protruding forward is provided on the slider 4, and a stopper groove 1-1 cooperating with the stopper 4-1 is provided on the lumbar support frame 1; a plurality of groove positions are arranged in the stop groove 1-1, and the stop block 4-1 is matched with different groove positions in the sliding process of the sliding block 4.

Compared with the prior art, the seat lumbar support adjusting mechanism provided by the embodiment has the advantages that after the sliding block 4 is adjusted in place, the sliding block is not easy to accidentally change and slide due to the action of the lumbar and back attaching force of a user, and the lumbar support locking effect is good.

In this embodiment, preferably, the sliding block 4 is of a three-gear sliding positioning structure, and correspondingly, three different slots are provided in the stop slot 1-1; thereby ensuring that each gear can be stably propped against. Obviously, the number of gears of the sliding block 4 can be appropriately changed according to different actual needs by a person skilled in the art, and correspondingly, the number of grooves on the stop groove 1-1 is adaptively changed; the present embodiment is not limited.

It should be noted that, the multi-gear sliding structure of the sliding block 4 and the chair back bracket 3 may be a conventional elastic buckle and clamping groove matching manner, or may be other multi-gear adjusting structures which can be realized in the future; this is a common technical knowledge that is well known to those skilled in the art and will not be described in detail herein.

Referring to fig. 4, a lumbar support pad 5 is further mounted on the lumbar support frame 1, the lumbar support frame 1 and the lumbar support pad 5 are arc-shaped members, and the lumbar support pad 5 is positioned in the lumbar support frame 1 and is unfolded left and right. The combined design of the lumbar support frame 1 and the lumbar support cushion 5 makes the lumbar of the user very comfortable to lean against and can lift up and down along with the backrest. In some embodiments, the lumbar support pad 5 may be omitted, and is not limited to this embodiment.

In this embodiment, an arc-shaped connecting rod 1-2 is further disposed at the back of the lumbar support frame 1, and the connecting rod 1-2 is integrally formed in the middle of the lumbar support frame 1 and divides the space enclosed by the lumbar support frame 1 into an upper region and a lower region; the connecting rod 1-2 protrudes towards the rear side, and the supporting arm 2 is rotatably connected with the middle part of the connecting rod 1-2. Thus, the best propping effect is achieved, and the sliding block 4 can be lifted more smoothly and is not easy to slip. It is obvious that the connection position of the support arm 2 and the lumbar support frame 1 can be changed appropriately by those skilled in the art according to the actual needs; the present embodiment is not limited.

Referring to fig. 5, a backrest 6 is mounted on the backrest support 3, the backrest 6 is composed of an upper backrest 6-1 and a lower backrest 6-2, and the lower side of the upper backrest 6-1 is rotatably connected with the backrest support 3 and provides a rotational restoring force through an elastic restoring member; the upper side of the upper backrest 6-1 is higher than the backrest bracket 3 and is suspended. In this way, the upper backrest 6-1 can be tilted forwards and backwards at a certain angle, so that the back fitting is more comfortable.

In this embodiment, the elastic restoring member is preferably an elastic steel sheet 6-3, and in some embodiments, the elastic restoring member may be a torsion spring, so long as the elastic restoring member can provide an elastic restoring force.

In this embodiment, the backrest support 3 preferably includes a connection bracket 3-1 for connecting a seat and a height-adjustable lifting bracket 3-2 installed on the connection bracket 3-1 in a lifting manner, and the backrest 6, the lumbar support frame 1, and the support arm 2 are all connected to the lifting bracket 3-2. When the chair is applied, the common adjustment of the back rest and the waist rest can be realized by adjusting the height of the lifting bracket 3-2, and the adjustment is simple and convenient; the position of the backrest and the lumbar support can be changed according to different actual needs to match different comfort requirements of different users.

In some embodiments, only the lumbar support frame, and the support arm, may be coupled to the lifting bracket; the present embodiment is not limited.

Example 2

The present embodiment provides a seat lumbar adjustment mechanism that is substantially identical to embodiment 1, except that 1) one end of the support arm is rotatably connected to the middle portion of the bottom bar of the lumbar frame. 2) The backrest and the backrest support are directly connected in a lifting manner, the height of which is adjustable, and the lumbar support frame, the supporting arms and the backrest are connected. The structure is simpler.

It should be further noted that, in the description of the present utility model, terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. refer to the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present utility model.

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. Thus, the definition of "a first", "a second" feature may explicitly or implicitly include one or more of such features, and in the description of the utility model, "at least" means one or more, unless clearly specifically defined otherwise.

In the present utility model, unless explicitly stated and limited otherwise, the terms "assembled," "connected," and "connected" are to be construed broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; can be directly connected or connected through an intermediate medium, and can be communicated with the inside of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless specified and 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," "below," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply representing the first feature as having a higher level than the second feature. The first feature being "above," "below," and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or simply indicating that the first feature is level below the second feature.

It will be understood by those skilled in the art from the foregoing description of the structure and principles that the present utility model is not limited to the specific embodiments described above, but is intended to cover modifications and alternatives falling within the spirit and scope of the utility model as defined by the appended claims and their equivalents. The portions of the detailed description that are not presented are all prior art or common general knowledge.

Claims (10)

1. The seat lumbar support adjusting mechanism comprises a lumbar support frame and a supporting arm, wherein the upper side of the lumbar support frame is rotationally connected with a seat back support, one end of the supporting arm is rotationally connected with the lumbar support frame, and the other end of the supporting arm is in lifting positioning connection with the seat back support through a sliding block; the waist rest is characterized in that a stop block protruding forwards is arranged on the sliding block, and a stop groove matched with the stop block is arranged on the waist rest frame; the stop groove is internally provided with a plurality of groove positions, and the stop block is matched with different groove positions in the sliding process of the sliding block.

2. The seat lumbar support adjustment mechanism of claim 1 wherein lumbar support pads are mounted on said lumbar support frame, said lumbar support frame and said lumbar support pads being arcuate members, said lumbar support pads being positioned within said lumbar support frame and deployed side-to-side.

3. The seat lumbar adjustment mechanism of claim 1 wherein an arcuate link is provided on the back of the lumbar frame, the link projecting toward the rear, the support arm being pivotally connected to a central portion of the link.

4. A seat lumbar adjustment mechanism as set forth in claim 3, wherein said link is integrally formed in a central portion of said lumbar frame dividing an enclosure of said lumbar frame into upper and lower regions.

5. The seat lumbar adjustment mechanism of claim 1 wherein one end of said support arm is pivotally connected to a center portion of a bottom bar of said lumbar frame.

6. The seat lumbar adjustment mechanism of claim 1 wherein a back rest is mounted on said back rest support, said back rest being comprised of an upper back rest and a lower back rest, the underside of said upper back rest being rotatably connected to said back rest support and providing a rotational return force via an elastic return member; the upper side of the upper backrest is higher than the chair back bracket and is suspended.

7. The seat lumbar adjustment mechanism of claim 6 wherein said resilient return member is a resilient steel sheet or torsion spring.

8. The seat lumbar adjustment mechanism of claim 6 wherein said back and said back support form a height adjustable lifting connection, said lumbar frame, said support arm and said back support being connected.

9. The seat lumbar adjustment mechanism of claim 6 wherein said seat back support includes a connecting bracket for connecting to a seat base and a height adjustable lifting bracket mounted on said connecting bracket, said back rest, said lumbar support frame, and said support arm being connected to said lifting bracket.

10. The seat lumbar adjustment mechanism of claim 1 wherein said seat back support includes a connecting bracket for connecting to a seat base and a height adjustable lifting bracket mounted on said connecting bracket in a lifting manner, said lumbar frame and said support arm being connected to said lifting bracket.