CN211862336U

CN211862336U - Connecting mechanism of headrest and backrest

Info

Publication number: CN211862336U
Application number: CN202020574349.7U
Authority: CN
Inventors: 李晨欢
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-11-06
Anticipated expiration: 2030-04-16

Abstract

The utility model belongs to the technical field of the swivel chair, especially, relate to a coupling mechanism of headrest and back. It has solved the little scheduling problem of prior art application scope. This coupling mechanism of headrest and back includes the back frame, and back frame top is connected with the headrest and supports, and the top that the headrest supported is connected with the headrest frame through the hinge and the headrest frame can rotate with the hinge around supporting by the headrest relatively, is equipped with angle control locking mechanism between the headrest is supported and the headrest frame. The utility model has the advantages that: the application range is expanded.

Description

Connecting mechanism of headrest and backrest

Technical Field

The utility model belongs to the technical field of the swivel chair, especially, relate to a coupling mechanism of headrest and back.

Background

The headrest of the swivel chair provides a head support for the user to further improve the comfort of use.

While conventional headrests are mounted on top of the backrest by headrest supports, some inventors have devised headrests that can be raised and lowered to extend the range of use. Although the swivel chair has the advantages, the headrest cannot be used for adjusting the angle forwards and backwards, and has certain limitation in use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above problem, provide a coupling mechanism of headrest and back that can enlarge application scope.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

the backrest comprises a fixed supporting frame and a backrest outer frame fixed on the fixed supporting frame, the top of the fixed supporting frame is transversely arranged in the middle of the backrest outer frame, a waist support positioned in the backrest outer frame is arranged at the top of the fixed supporting frame, a T-shaped waist support is arranged on one surface, close to a human body, of the top of the fixed supporting frame, a position adjusting mechanism used for adjusting the vertical height position of the T-shaped waist support is arranged between the fixed supporting frame and the T-shaped waist support, and each end of the T-shaped waist support is connected with the waist support through a connecting structure and is distributed at the front and the back of the waist support and the T-shaped waist support at intervals.

The position adjusting mechanism comprises a position adjusting waist hole arranged at the center of a vertical section of the T-shaped waist leaning frame, an adjusting sliding column is arranged at one side, close to one side of a human body, of the top of the fixed supporting frame, one end, far away from the fixed supporting frame, of the adjusting sliding column is inserted into the position adjusting waist hole, the position adjusting block is fixed at one end, far away from the fixed supporting frame, of the adjusting sliding column through a bolt, the position adjusting block limits the T-shaped waist leaning frame between the position adjusting block and the top of the fixed supporting frame, a vertical guide structure is arranged between the position adjusting block and the vertical section of the T-shaped waist leaning frame, and a position locking structure for locking the T-shaped waist leaning frame is arranged between the position adjusting block and the vertical section of the T-shaped waist leaning frame.

The vertical guide structure comprises guide convex strips arranged on two sides of a position adjusting waist hole close to an orifice of the position adjusting block, the two guide convex strips are parallel to each other, one surface of the position adjusting block close to the position adjusting waist hole is provided with a guide convex part protruding towards the position adjusting waist hole side, the guide convex part is positioned between the two guide convex strips, and the vertical two sides of the guide convex part are respectively in one-to-one sliding connection with the guide convex strips; the vertical guide structure further comprises a guide waist hole which is arranged in the position adjusting waist hole and is far away from one end of the position adjusting block, one end of the adjusting sliding column, which is far away from the fixed supporting frame, is connected with a waist-shaped head, the waist-shaped head is inserted into the position adjusting waist hole, and one end face, which is connected with the waist-shaped head, of the adjusting sliding column is matched with the bottom face of the hole of the guide waist hole.

Position locking structure include two locking sand grips, one of them locking sand grip is located the outside of one of them direction sand grip, another locking sand grip is located the outside of another direction sand grip, locking sand grip and direction sand grip be parallel to each other, be equipped with a plurality of interval evenly distributed's arc locking groove in proper order on every locking sand grip respectively, the one side both ends that are equipped with the direction convex part at the position regulating block still are connected with the locking convex part respectively, at least one arc locking groove on one of them locking sand grip of one of them locking convex part card, at least one arc locking groove on another locking sand grip of another one locking convex part card, be equipped with the arc convex surface and arc locking groove phase match on every locking convex part respectively.

Waist lean on position upside between two parties be equipped with vertical decompression groove to and with two side direction decompression grooves of vertical decompression groove lower extreme intercommunication, two side direction decompression grooves communicate and form the U-shaped groove.

Positioning steps are arranged on two sides of the lower end of the backrest outer frame, two sides of the upper end of the fixed supporting frame are respectively fixed on the positioning steps, positioning lugs are respectively arranged on the inner sides of the upper ends of the fixed supporting frame, and a first fastening piece which is arranged on the positioning lugs in a penetrating mode is connected with screw holes on the inner side of the lower end of the backrest outer frame in a threaded mode; a second fastening piece is arranged at the lower end of the backrest outer frame in a penetrating way and is in threaded connection with a threaded hole in the middle of the fixed supporting frame,

this coupling mechanism of headrest and back includes the back frame, and back frame top is connected with the headrest and supports, and the top that the headrest supported is connected with the headrest frame through the hinge and the headrest frame can rotate with the hinge around supporting by the headrest relatively, is equipped with angle control locking mechanism between the headrest is supported and the headrest frame.

In the coupling mechanism of foretell headrest and back, angle control locking mechanism is including setting up the arc convex surface at the headrest support top to and set up on the arc convex surface and protruding along a plurality of locking control of arc convex surface width direction setting, it is close to the arc cantilever spring bolt of human one side top to be equipped with to be located two hinge seats at the lower extreme of headrest frame, the interior arc concave surface of arc cantilever spring bolt is located arc convex surface top and is equipped with a plurality of locking control grooves that set up along interior arc concave surface width direction interval in proper order on the interior arc concave surface, the protruding card of locking control goes into in arbitrary one locking control groove.

In the connecting mechanism of the headrest and the backrest, the arc-shaped cantilever spring bolt is arranged downwards and slantwise towards one side of the human body.

In the connecting mechanism of the headrest and the backrest, the lower end of the headrest frame is provided with two opposite hinge shaft seats, the top of the headrest support is positioned between the two hinge shaft seats, and the two ends of the hinge shaft penetrate through the hinge shaft seats one by one.

In the above connecting mechanism for the headrest and the backrest, the arc-shaped cantilever lock tongue is located between the two hinge seats.

In the connecting mechanism of the headrest and the backrest, a reinforcing rib is connected between the upper surface of one end of the arc-shaped cantilever spring bolt, which is close to the headrest frame, and the headrest frame.

In the connecting mechanism of the headrest and the backrest, the headrest frame, the arc-shaped cantilever spring bolt and the hinge seat are integrally formed by injection molding.

In the above connecting mechanism for the headrest and the backrest, the top of the backrest outer frame is connected with the headrest support through the lifting control mechanism.

In the connecting mechanism of the headrest and the backrest, the lifting control mechanism comprises a cylindrical mounting seat fixed on the lower surface of the top of the outer frame of the backrest, the headrest support is inserted into the cylindrical mounting seat, an elastic lock catch is arranged on one side of the cylindrical mounting seat close to the human body, a plurality of lock catch grooves are sequentially distributed at intervals along the length direction of the headrest support on one side of the headrest support close to the human body, and the elastic lock catch is buckled in any lock catch groove; the headrest support is also provided with an upper limiting convex part and a lower limiting convex part on one side surface provided with a lock catch groove, and the lock catch groove is positioned between the upper limiting convex part and the lower limiting convex part.

In the connecting mechanism of the headrest and the backrest, the outer wall of the cylindrical mounting seat is provided with the outer convex part and two bolts penetrating through the outer convex part, and the bolts are in threaded connection with threaded holes in the top of the backrest outer frame.

Compared with the prior art, the utility model has the advantages of:

1. the waist rest position adjustment can be realized, so that the use requirements of different users on different waist rest positions are met, and the application range and the practicability are further expanded.

2. Can realize the headrest frame in the height of vertical direction, secondly, thereby the rotation through the headrest frame can realize the regulation of headrest frame front and back angular position, promptly, the locking control arch can go into different locking control groove in order to realize rotating the fixed locking of back position more, can further improve the practicality.

Drawings

Fig. 1 is a schematic structural view of a connecting mechanism of a headrest and a backrest provided by the present invention.

Fig. 2 is a schematic structural view of a connecting mechanism between a headrest and a backrest with another viewing angle according to the present invention.

Fig. 3 is a schematic view of the connection structure of the fixing support frame and the T-shaped waist support frame provided by the present invention.

Fig. 4 is a schematic view of the lumbar support structure provided by the present invention.

Fig. 5 is a schematic structural view of the fixing support frame provided by the present invention.

Fig. 6 is a schematic structural diagram of the position adjusting block provided by the present invention.

Fig. 7 is a schematic view of the headrest and the headrest support connection structure provided by the present invention.

Fig. 8 is a schematic structural diagram of the lifting control mechanism provided by the present invention.

Fig. 9 is a schematic view of the headrest structure provided by the present invention.

Fig. 10 is a schematic view of a two-step structure of the lower side of the backrest frame according to the present invention.

In the figure, the fixed support frame 1, the positioning lug 11, the first fastening piece 12, the backrest outer frame 2, the second fastening piece 21, the lumbar support 3, the vertical decompression groove 31, the lateral decompression groove 32, the T-shaped lumbar support 4, the position adjusting lumbar hole 41, the adjusting sliding column 42, the position adjusting block 43, the locking protrusion 430, the guide convex strip 44, the guide convex strip 45, the guide lumbar hole 46, the lumbar head 47, the locking convex strip 48, the arc-shaped locking groove 480, the connecting structure 5, the headrest support 6, the locking groove 61, the upper limiting protrusion 62, the lower limiting protrusion 63, the hinge shaft 64, the arc-shaped convex surface 65, the locking control protrusion 66, the headrest frame 7, the hinge shaft seat 71, the arc-shaped cantilever lock tongue 72 and the locking control groove 73.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in figures 1, 2, 5 and 10,

the backrest comprises a fixed supporting frame 1 and a backrest outer frame 2 fixed on the fixed supporting frame 1, specifically, two sides of the lower end of the backrest outer frame 2 are provided with positioning steps, two sides of the upper end of the fixed supporting frame 1 are respectively fixed on the positioning steps, the inner sides of the upper end of the fixed supporting frame 1 are respectively provided with a positioning lug 11 and a fastener I12 penetrating through the positioning lug 11, the fastener I12 is in threaded connection with a screw hole on the inner side of the lower end of the backrest outer frame 2, and the fastener I12 is in threaded connection with the screw hole on the inner side of the lower end of the backrest outer frame 2 from the radial direction of the fixed supporting frame 1 to the outside;

a second fastening piece 21 is arranged at the lower end of the backrest outer frame 2 in a penetrating way, and the second fastening piece 21 is in threaded connection with a threaded hole in the middle of the fixed supporting frame 1. The second fastener 21 is connected to the back frame 2 from the thickness direction of the fixing support frame 1.

The fasteners are bolts or the like.

The top of the fixed support frame 1 is transversely arranged in the middle of the backrest outer frame 2, and the combination mode can strengthen the structure formation and simultaneously facilitate the installation and the fixation of the waist support.

As shown in figures 1-4, a lumbar support 3 is arranged in the backrest outer frame 2 at the top of the fixed support frame 1, a vertical pressure-reducing groove 31 is arranged at the upper side of the middle position of the lumbar support 3 for improving the elasticity of the lumbar support, and two lateral pressure-reducing grooves 32 are communicated with the lower end of the vertical pressure-reducing groove 31, and the two lateral pressure-reducing grooves 32 are communicated to form a U-shaped groove. The vertical pressure-reducing grooves 31 have a groove width equal to that of the lateral pressure-reducing grooves 32, which can facilitate manufacturing.

Furthermore, the lumbar support 3 is in an arc structure transversely along the cross section of the backrest outer frame 2 in the width direction, and is in an arc protrusion towards one side of the human body, and is in an arc structure transversely along the cross section of the backrest outer frame 2 in the length direction, so that a convex waist support is provided.

The T-shaped waist support frame 4 is arranged on one surface, close to a human body, of the top of the fixed support frame 1, the transverse portion of the T-shaped waist support frame 4 is of an arc-shaped structure, the arc radius of the transverse portion of the T-shaped waist support frame 4 is larger than the arc radius of the waist support 3 (namely, the waist support is of an arc-shaped structure transversely along the cross section in the width direction of the backrest outer frame), a position adjusting mechanism for adjusting the vertical height position of the T-shaped waist support frame 4 is arranged between the fixed support frame 1 and the T-shaped waist support frame 4, specifically, the position adjusting mechanism comprises a position adjusting waist hole 41 arranged at the center of the vertical section of the T-shaped waist support frame 4, an adjusting sliding column 42 is arranged on one side, close to the human body, of the top of the fixed support frame 1, one end, far away from the fixed support frame 1, of the adjusting sliding column 42 is inserted into the position adjusting waist hole 41, a position adjusting block 43 is further included, the position adjusting block 43 is fixed at one end, far away from the fixed sliding column 42 A vertical guide structure is arranged between the joint block 43 and the top of the fixed support frame 1 and between the position adjusting block 43 and the vertical section of the T-shaped lumbar support frame 4, furthermore, the vertical guide structure comprises guide convex strips 44 which are arranged at two sides of a hole of the position adjusting block 43 close to the position adjusting block 41, the two guide convex strips 44 are parallel to each other, one side of the position adjusting block 43 close to the position adjusting lumbar hole 41 is provided with a guide convex part 45 which is convex towards the position adjusting lumbar hole 41 side, the guide convex part 45 is arranged between the two guide convex strips 44, and the vertical two sides of the guide convex part 45 are respectively connected with the guide convex strips 44 in a one-to-one sliding mode; the vertical guide structure further comprises a guide waist hole 46 which is arranged at one end of the position adjusting waist hole 41 far away from the position adjusting block 43, one end of the adjusting sliding column 42 far away from the fixed supporting frame 1 is connected with a waist-shaped head 47, the waist-shaped head 47 is inserted into the position adjusting waist hole 41, and one end face of the adjusting sliding column 42, which is connected with the waist-shaped head 47, is matched with the bottom face of the guide waist hole 46.

Be equipped with at position control piece 43 center and cross the nail hole, be equipped with the waist type hole body that matches with waist type head 47 in the one end of crossing nail hole near direction convex part 45, this waist type hole body and waist type head 47 match each other and can improve the fastness that position control piece 43 and waist type head 47 are connected, wear to be equipped with the screw that stretches into to waist type head central thread hole in crossing the nail hole, realize the connection of two parts.

As shown in fig. 4 to 6, and a position locking structure for locking the position of the T-shaped lumbar support 4 is provided between the position adjusting block 43 and the vertical section of the T-shaped lumbar support 4. Specifically, the position locking structure includes two locking ribs 48, one of the locking ribs 48 being located outside one of the guide ribs 44, the other locking rib 48 is located outside the other guiding rib 44, said locking rib 48 and guiding rib 44 are parallel to each other, a plurality of arc-shaped locking grooves 480 which are evenly distributed at intervals in sequence are respectively arranged on each locking convex strip 48, the central angle of each arc-shaped locking groove 480 is less than 180 degrees, the locking protrusions 430 are respectively connected to both ends of the side of the position adjusting block 43 where the guide protrusion 45 is provided, one of the locking projections 430 is engaged in at least one of the arcuate locking slots 480 in one of the locking ribs 48, the other locking projection 430 is engaged in the at least one arcuate locking groove 480 in the other locking rib 48, an arcuate convex surface is provided on each locking protrusion 430 and mates with the arcuate locking groove 480.

Each end of the T-shaped lumbar support 4 is connected with the lumbar support 3 through a connecting structure 5, and the lumbar support 3 and the T-shaped lumbar support 4 are distributed at intervals in the front-back direction. Connection structure 5 includes the screw one of wearing to establish and leans on two bights on the 3 upside in the waist to and wear to establish two screws two side by side in the middle part of the 3 downside in the waist, two screws one and T shape waist lean on the screw hole one-by-one threaded connection at 4 horizontal portion both ends of frame, two screws two and T shape waist lean on two screw hole one-by-one threaded connection of the vertical section of frame 4.

The support formed by the three-point distribution can ensure the stability of the waist support fixation, and simultaneously, can provide a stable lumbar support.

In this embodiment, grip T shape waist through external force and lean on frame 4, can realize that T shape waist leans on frame 4 position control in vertical side, because locking convex part 430 gets into the locking that different arc locking groove 480 then can carry out position altitude mixture control and position, promptly, can realize the position control that the waist leaned on to satisfy different users and lean on the user demand in position to different waists, further enlarged application scope and practicality.

As shown in fig. 1-2 and fig. 7-9, the top of the backrest frame 2 is connected with a headrest support 6 through a lifting control mechanism, the top of the headrest support 6 is connected with a headrest frame 7 through a hinge shaft 64, the headrest frame 7 can rotate relative to the headrest support 6 by the hinge shaft 64, and the top of the headrest support 6 is connected with the headrest frame 7 through an angle control locking mechanism. Specifically, the lifting control mechanism comprises a cylindrical mounting seat 22 fixed on the lower surface of the top of the backrest outer frame 2, the headrest support 6 is inserted into the cylindrical mounting seat 22, an elastic lock catch 23 is arranged on one side surface, close to a human body, of the cylindrical mounting seat 22, a plurality of lock catch grooves 61 are arranged on one side surface, close to the human body, of the headrest support 6, the lock catch grooves 61 are sequentially distributed at intervals along the length direction of the headrest support 6, and the elastic lock catch 23 is buckled in any one of the lock catch grooves 61; the headrest support 6 further has an upper limit projection 62 and a lower limit projection 63 on the side thereof where the latch groove 61 is provided, and the latch groove 61 is located between the upper limit projection 62 and the lower limit projection 63.

Furthermore, the outer wall of the cylindrical mounting seat is provided with an outer convex part and two bolts penetrating through the outer convex part, and the bolts are in threaded connection with threaded holes in the top of the outer backrest frame.

Secondly, angle control locking mechanism is including wearing to establish the hinge 64 at headrest support 6 tops, the lower extreme of headrest frame 7 is equipped with two relative hinge axle seats 71, the headrest supports 6 tops and is located between two hinge axle seats 71 and wear to establish on hinge axle seat 71 one by one at the both ends of hinge 64, support 6 tops at the headrest and be equipped with arc convex surface 65 and set up on arc convex surface 65 and along a plurality of locking control protrusion 66 of arc convex surface 65 width direction setting, be equipped with the arc cantilever spring bolt 72 that is located two hinge axle seats 71 and is close to human one side top at the lower extreme of headrest frame 7, the interior arc concave surface of arc cantilever spring bolt 72 is located arc convex surface 65 top and is equipped with a plurality of locking control groove 73 that set up along interior arc concave surface width direction interval in proper order on the interior arc concave surface, locking control protrusion 66 blocks in arbitrary locking control groove 73.

An arc-shaped cantilever latch 72 is located between the two hinge axis seats 71. Next, a reinforcing rib is connected between the upper surface of one end of the arc-shaped cantilever latch 72 close to the headrest frame 7 and the headrest frame 7. A stiffener which may provide structural reinforcement to the arc-shaped cantilever latch tongue 72 having a free end.

Also, the headrest frame 7, the arc-shaped cantilever latch 72, and the hinge base 71 are integrally formed by injection molding. It further improves structural strength by integrated molding.

By holding the headrest support, the height of the headrest frame 7 in the vertical direction can be achieved, i.e. the snap-in of the resilient catch 23 into the different catch grooves 61 enables a position height adjustment. Secondly, the adjustment of the front and rear angular positions of the headrest frame 7 can be achieved by the rotation of the headrest frame 7, that is, the locking control projections 66 can go into different locking control grooves 73 to achieve fixed locking of the rotated position.

Further, the arc-shaped cantilever latch 72 is disposed obliquely downward toward the human body side. So as to prevent contact with the head from affecting the comfort of use.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. Connecting mechanism of headrest and back, including back frame (2), back frame (2) top is connected with headrest support (6), its characterized in that, the top that headrest support (6) is connected with headrest frame (7) and headrest frame (7) can support (6) around with hinge (64) relatively the headrest and rotate, are equipped with angle control locking mechanism between headrest support (6) and headrest frame (7).

2. The connecting mechanism of the headrest and the backrest according to claim 1, wherein the angle control locking mechanism comprises an arc-shaped convex surface (65) arranged at the top of the headrest support (6) and a plurality of locking control protrusions (66) arranged on the arc-shaped convex surface (65) and arranged along the width direction of the arc-shaped convex surface (65), an arc-shaped cantilever locking tongue (72) is arranged at the lower end of the headrest frame (7), the inner arc-shaped concave surface of the arc-shaped cantilever locking tongue (72) is positioned above the arc-shaped convex surface (65) and is provided with a plurality of locking control grooves (73) which are sequentially arranged along the width direction of the inner arc-shaped concave surface at intervals, and the locking control protrusions (66) are clamped into any one of the locking control grooves (73).

3. The headrest and backrest connection mechanism according to claim 2, wherein the arc-shaped cantilever latch (72) is provided obliquely downward toward the human body side.

4. The connecting mechanism of headrest and backrest according to claim 2, characterized in that the lower end of the headrest frame (7) is provided with two opposite hinge seats (71), the top of the headrest support (6) is located between the two hinge seats (71) and the two ends of the hinge shaft (64) are respectively inserted through the hinge seats (71).

5. The headrest and backrest connection mechanism according to claim 4, characterized in that the arc-shaped cantilever latch tongue (72) is located between two hinge seats (71).

6. The headrest and backrest connection mechanism as claimed in claim 3, wherein a reinforcing rib is connected between the upper surface of one end of the arc-shaped cantilever latch (72) close to the headrest frame (7) and the headrest frame (7).

7. The headrest and backrest connection mechanism as claimed in claim 4, wherein the headrest frame (7), the arc-shaped cantilever latch (72) and the hinge base (71) are integrally formed by injection molding.

8. The headrest and backrest connecting mechanism according to claim 1, wherein the headrest support (6) is connected to the top of the backrest frame (2) through a lifting control mechanism.

9. The connecting mechanism of the headrest and the backrest according to claim 8, wherein the lifting control mechanism comprises a cylindrical mounting seat (22) fixed on the lower surface of the top of the backrest outer frame (2), the headrest support (6) is inserted into the cylindrical mounting seat (22), an elastic latch (23) is arranged on one side of the cylindrical mounting seat (22) close to the human body, a plurality of latch grooves (61) are arranged on one side of the headrest support (6) close to the human body at intervals in sequence along the length direction of the headrest support (6), and the elastic latch (23) is latched in any one latch groove (61); the headrest support (6) is provided with an upper limiting convex part (62) and a lower limiting convex part (63) on one side surface of the headrest support, wherein the locking groove (61) is positioned between the upper limiting convex part (62) and the lower limiting convex part (63).

10. The headrest and backrest connection mechanism as claimed in claim 9, wherein the cylindrical mounting seat has an outer protrusion on an outer wall thereof, and two bolts are inserted into the outer protrusion, and the bolts are threadedly engaged with threaded holes formed in a top portion of the backrest frame.