Height adjusting device of headrest

Abstract

The utility model relates to a headrest height adjusting device which comprises a supporting seat connected with a backrest, a headrest and a sliding rod, the sliding rod is hinged to the rear side of the headrest and is in sliding fit with the supporting seat, a plurality of locking grooves are formed in the sliding rod in the vertical direction, the supporting seat comprises a seat body, a rear cover plate and a front cover plate, and the seat body, the rear cover plate and the front cover plate are arranged in a split mode. The front cover plate is located on the front side face of the backrest, the seat body and the rear cover plate are located on the rear side face of the backrest, the rear end of the front cover plate is connected with the seat body through a connecting piece, the rear cover plate is located on the rear side face of the seat body, a groove is formed in the rear cover, a through groove is formed between the rear cover and the seat body, the sliding rod is arranged in the through groove in a sliding mode, and an elastic locking piece is further arranged on the supporting seat. And after the sliding rod slides, the sliding rod extends into the locking groove to lock the headrest. By the adoption of the technical scheme, the height adjusting device of the headrest is simple and convenient in structure and convenient to operate, and the height of the headrest can be adjusted by one hand.

Description

TECHNICAL FIELD

[0001] The utility model relates to chair technical field especially is involved in a height adjusting device of headrest. BACKGROUND

[0002] The chair is a kind of chair with backrest, some also have armrest. The existing chair is set with headrest structure on chair back to improve the comfort of human body, so that the head of human body is placed on headrest in sitting posture, thereby providing comfortable rest support, and forming protection to the head and neck of human body.

[0003] However, due to the different height of different users, the height of the head is higher when the person with higher height sits down, therefore, the height of headrest is required to be higher, and the height of headrest is required to be lower when the person with lower height sits down, therefore, the headrest needs to have height adjustable function. However, the existing chair headrest height adjustment mode is more cumbersome, and cannot realize one-hand operation, which is time-consuming and laborious. SUMMARY

[0004] The utility model discloses a height adjusting device of headrest, simple structure, convenient operation, one hand can realize the height adjustment of headrest.

[0005] The utility model discloses a height adjusting device of headrest, simple structure, convenient operation, one hand can realize the height adjustment of headrest.

[0006] The utility model discloses a height adjusting device of headrest, simple structure, convenient operation, one hand can realize the height adjustment of headrest.

[0007] The utility model discloses further provide: the elastic locking piece includes elastic member and positioning column, be equipped with installation cavity on the seat body, the elastic member and positioning column are located installation cavity, and positioning column is under the action of elastic member and stretches out installation cavity and cooperates with locking groove, and the end of positioning column away from elastic member is arc-shaped and is arranged.

[0008] Adopt the further setting, elastic member can adopt spring setting, also can adopt elastic sheet setting, under the action of external force, pull the sliding rod and slide, and the end of positioning piece is separated from the current locking groove, and the elastic member is compressed and is retracted to the installation cavity, until the sliding rod stops sliding, and the end of positioning column is inserted into another locking groove, realizes the locking of sliding rod, and the operation is convenient, and single hand pulls the sliding rod and can complete the height adjustment of headrest.

[0009] The utility model discloses further provide: the rear side of the seat body is equipped with guide piece respectively on both sides of installation cavity, the sliding rod is equipped with lug along its length direction, and each locking groove is arranged on the lug, and the both sides of sliding rod are equipped with the flanging extending to the lug direction, and the flanging and the lug form the sliding slot for the sliding of guide piece.

[0010] Adopt the further setting, the setting of lug can enhance the firmness of sliding rod, and also can cooperate with flanging and guide and limit the sliding rod, and make its sliding stability good.

[0011] The utility model discloses further provide: the rear side of the seat body is equipped with connecting block correspondingly, the connecting block is inserted in the connecting groove, and the connecting block is equipped with second connecting hole, and the front cover plate is equipped with third connecting hole correspondingly, and each connecting hole is coaxial and is arranged and is inserted connecting piece in hole to connect front cover plate, seat body and rear cover plate.

[0012] Adopt the further setting, and the connecting of each component between support seat is convenient, and installs with two screws, and the installation is convenient, and the first connecting hole is located rear side of rear cover plate, and is in counterbore setting, so that the end of screw is flush with rear cover plate, is more beautiful.

[0013] The utility model discloses further provide: the rear side of the seat body is equipped with connecting block correspondingly, the connecting block is inserted in the connecting groove, and the connecting block is equipped with second connecting hole, and the front cover plate is equipped with third connecting hole correspondingly, and each connecting hole is coaxial and is arranged and is inserted connecting piece in hole to connect front cover plate, seat body and rear cover plate.

[0014] Adopt the further setting, and the connecting of each component between support seat is convenient, and installs with two screws, and the installation is convenient, and the first connecting hole is located rear side of rear cover plate, and is in counterbore setting, so that the end of screw is flush with rear cover plate, is more beautiful.

[0015] The utility model discloses further provide: the rear side of the seat body is equipped with connecting block correspondingly, the connecting block is inserted in the connecting groove, and the connecting block is equipped with second connecting hole, and the front cover plate is equipped with third connecting hole correspondingly, and each connecting hole is coaxial and is arranged and is inserted connecting piece in hole to connect front cover plate, seat body and rear cover plate.

[0016] With the further setting, the headrest can be adjusted in angle, and can be turned back or turned forward, suitable for different users.

[0017] The further setting of the utility model is that: the side of the sliding rod close to the headrest is equipped with a positioning block, so as to abut against the connecting seat to position the headrest when the headrest is turned forward.

[0018] With the further setting, the turning angle of the headrest is limited, so that the angle is not too large when the headrest is turned forward, and the use is not uncomfortable. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic view of the headrest of the utility model installed behind the seat;

[0020] Figure 2 It is a structural schematic view of the utility model;

[0021] Figure 3 It is a sectional view of the utility model;

[0022] Figure 4 It is a schematic view of the headrest and the sliding rod of the utility model;

[0023] Figure 5 It is an explosion view of the headrest and the sliding rod of the utility model;

[0024] Figure 6 It is a schematic view of the support seat of the utility model;

[0025] Figure 7 It is a schematic view of the sliding rod of the utility model;

[0026] Figure 8 It is an explosion view of the support seat of the utility model;

[0027] Figure 9 It is another explosion view of the support seat of the utility model.

[0028] In the figure, 1, support seat; 11, seat body; 111, mounting cavity; 112, guide piece; 113, connecting block; 114, second connecting hole; 12, back cover plate; 121, recess; 122, connecting groove; 123, first connecting hole; 124, guide rod; 13, front cover plate; 131, third connecting hole; 14, through slot; 15, elastic locking piece; 151, elastic piece; 152, positioning column; 2, headrest; 21, connecting seat; 211, connecting lug; 3, sliding rod; 31, locking groove; 32, protruding block; 33, flange; 34, guide groove; 35, connecting rod; 36, positioning block; 4, backrest. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0030] It should be noted that, in the description of the present application, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0031] In addition, in the present application, the description such as "first", "second", etc. is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. In the description of the present application, the meaning of "several" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0032] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of those skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0033] For example, Figures 1-9As shown, a height adjusting device of a headrest comprises a support base 1 connected with a backrest 4, a headrest 2 and a sliding rod 3, the sliding rod 3 is hingedly arranged at the rear side of the headrest 2 and is in sliding cooperation with the support base 1, the upper end of the sliding rod 3 is obliquely arranged towards the headrest 2, a plurality of locking grooves 31 are arranged along the vertical direction of the sliding rod 3, the adjacent two locking grooves 31 are arranged in a plane, and the locking grooves 31 are arranged in an arc shape, the support base 1 comprises a seat body 11, a rear cover plate 12 and a front cover plate 13 which are arranged in a split manner, the front cover plate 13 is located at the front side of the backrest 4, the seat body 11 and the rear cover plate 12 are located at the rear side of the backrest 4, the rear end of the front cover plate 13 is connected with the seat body 11 through a connecting piece, and the rear cover plate 12 is located at the rear side of the seat body 11, a recess 121 is arranged on the rear cover plate 12 and forms a through groove 14 with the seat body 11, the sliding rod 3 is slidingly arranged in the through groove 14, and an elastic locking piece 15 is further arranged on the support base 1 to realize the locking of the headrest 2 after the sliding rod 3 slides and extends into the locking groove 31, the height of the headrest 2 can be adjusted by pulling the sliding rod 3 with one hand, the sliding rod 3 can slide in the through groove 14 under the action of an external force, when sliding, the end of the elastic locking piece 15 falls off from the current locking groove 31 to realize unlocking, after sliding to the required height, the end of the elastic locking piece is re-inserted into the current locking groove 31 for locking, the headrest 2 is hingedly connected with the sliding rod 3, the inclination angle of the headrest 2 can be adjusted, the headrest 2 can be adjusted according to the use requirements of the user, the practicality is high, the support base 1 is arranged in a split manner, which is convenient for the installation of the support base 1 and the backrest, a through hole is arranged on the backrest 4, the front cover plate 13 is inserted into the through hole and the outer side edge abuts against the backrest, and the seat body 11 abuts against the rear side of the backrest, so that the structure of the support base 1 is stable, and the backrest is not affected after the headrest 2 is disassembled.

[0034] The elastic locking piece 15 comprises an elastic piece 151 and a positioning column 152, an installation cavity 111 is arranged on the seat body 11, the elastic piece 151 and the positioning column 152 are located in the installation cavity 111, the positioning column 152 extends out of the installation cavity 111 and cooperates with the locking groove 31 under the action of the elastic piece 151, the end of the positioning column 152 away from the elastic piece 151 is arranged in a circular arc shape, the elastic piece 151 can be arranged in a spring or an elastic sheet, when the sliding rod 3 is pulled to slide under the action of an external force, the end of the positioning piece falls off from the current locking groove 31 and compresses the elastic piece 151 to retract into the installation cavity 111 until the sliding rod 3 stops sliding, the end of the positioning column 152 is inserted into another locking groove 31 to realize the locking of the sliding rod 3, the height adjustment of the headrest 2 can be completed by pulling the sliding rod 3 with one hand, which is convenient to operate.

[0035] The rear side of the seat body 11 is provided with a guide 112 on both sides of the mounting cavity 111, the sliding rod 3 is provided with a protrusion 32 along the length direction of the sliding rod 3, each locking groove 31 is arranged on the protrusion 32, the sliding rod 3 is provided with a flange 33 extending to the direction of the protrusion 32 on both sides, the flange 33 and the protrusion 32 form a sliding groove for the guide 112 to slide, the protrusion 32 can enhance the firmness of the sliding rod 3, and the flange 33 can cooperate with the protrusion 32 to guide and limit the sliding rod 3, so that the stability of the sliding rod 3 is good when sliding.

[0036] The rear cover plate 12 is provided with a connecting groove 122 and a first connecting hole 123 communicating with the connecting groove 122 on both sides of the recess 121, the rear side of the seat body 11 is correspondingly provided with a connecting block 113, the connecting block 113 is inserted into the connecting groove 122, the connecting block 113 is provided with a second connecting hole 114, the front cover plate 13 is correspondingly provided with a third connecting hole 131, each connecting hole is coaxially arranged and a connecting piece is arranged in the hole to connect the front cover plate 13, the seat body 11 and the rear cover plate 12, the components of the support seat 1 are convenient to connect, two screws can be used to realize installation, the installation is convenient, the first connecting hole 123 is located on the rear side of the rear cover plate 12 and is arranged as a counterbore, so that the end of the screw is flush with the rear cover plate 12, which is more beautiful.

[0037] The sliding rod 3 is provided with a guide groove 34 on the side away from the headrest 2, the rear cover is provided with a guide rod 124, the guide rod 124 is located in the guide groove 34 and slides with the guide groove 34, the structure of the sliding rod 3 is stable when sliding and does not deviate.

[0038] The rear side of the headrest 2 is integrally provided with a connecting seat 21, the connecting seat 21 is provided with two oppositely arranged connecting ears 211, the upper end of the sliding rod 3 is provided with a connecting rod 35, the connecting rod 35 is located between the two connecting ears 211 and is connected with the connecting ears 211 through a hinge shaft, so that the angle of the headrest 2 can be adjusted, the headrest 2 can be flipped backward or forward, and it is suitable for different users. The side of the sliding rod 3 close to the headrest 2 is provided with a positioning block 36, so that the position of the headrest 2 can be positioned by abutting against the connecting seat 21 when the headrest 2 is flipped forward, the flipping angle of the headrest 2 is limited, and the angle is too large when the headrest 2 is flipped forward, which causes uncomfortable use.

Claims

1. A height adjustment device of a headrest, characterized by, The utility model provides a headrest locking device, including the support seat (1) connected with backrest (4), headrest (2) and sliding rod (3), the rear side of headrest (2) is hinged to the sliding rod (3), and the sliding rod (3) is slidably connected with support seat (1), a plurality of locking grooves (31) are formed on the sliding rod (3) along the vertical direction of the sliding rod (3), the support seat (1) includes the seat body (11) of split setting, back cover plate (12) and front cover plate (13), the front cover plate (13) is located the front side of backrest (3), and the seat body (11) and back cover plate (12) are located the rear side of backrest (3), the rear end of front cover plate (13) is connected with seat body (11) through connecting piece, and back cover plate (12) is located the rear side of seat body (11), the back cover is provided with recess (121) and forms through groove (14) between seat body (11), the sliding rod (3) is slidably arranged in the through groove (14), and the support seat (1) is further provided with elastic locking piece (15), so as to realize the locking of headrest (2) after the sliding rod (3) slides and stretches into locking groove (31).

2. The height adjustment device of a headrest according to claim 1, characterized in that, The elastic locking piece (15) includes elastic element (151) and positioning column (152), the seat body (11) is provided with mounting cavity (111), the elastic element (151) and positioning column (152) are located in mounting cavity (111), the positioning column (152) is stretched out of mounting cavity (111) and matched with locking groove (31) under the action of elastic element (151), and the end portion of positioning column (152) away from elastic element (151) is arranged in arc shape.

3. The height adjustment device of a headrest according to claim 2, characterized in that, The rear side of seat body (11) is provided with guide element (112) on both sides of mounting cavity (111), the sliding rod (3) is provided with protrusion (32) along the length direction of the sliding rod (3), each locking groove (31) is arranged on the protrusion (32), and the sliding rod (3) is provided with flanging (33) extending to the direction of protrusion (32) on both sides, and the flanging (33) and protrusion (32) form sliding groove for the sliding of guide element (112).

4. The height adjustment device of a headrest according to claim 1 or 2 or 3, characterized in that, The rear side of seat body (11) is provided with guide element (112) on both sides of mounting cavity (111), the sliding rod (3) is provided with protrusion (32) along the length direction of the sliding rod (3), each locking groove (31) is arranged on the protrusion (32), and the sliding rod (3) is provided with flanging (33) extending to the direction of protrusion (32) on both sides, and the flanging (33) and protrusion (32) form sliding groove for the sliding of guide element (112).

5. The height adjustment device of a headrest according to claim 1 or 2 or 3, characterized in that, The rear side of seat body (11) is provided with guide element (112) on both sides of mounting cavity (111), the sliding rod (3) is provided with protrusion (32) along the length direction of the sliding rod (3), each locking groove (31) is arranged on the protrusion (32), and the sliding rod (3) is provided with flanging (33) extending to the direction of protrusion (32) on both sides, and the flanging (33) and protrusion (32) form sliding groove for the sliding of guide element (112). The rear side of seat body (11) is provided with guide element (112) on both sides of mounting cavity (111), the sliding rod (3) is provided with protrusion (32) along the length direction of the sliding rod (3), each locking groove (31) is arranged on the protrusion (32), and the sliding rod (3) is provided with flanging (33) extending to the direction of protrusion (32) on both sides, and the flanging (33) and protrusion (32) form sliding groove for the sliding of guide element (112). The rear side of seat body (11) is provided with guide element (112) on both sides of mounting cavity (111), the sliding rod (3) is provided with protrusion (32) along the length direction of the sliding rod (3), each locking groove (31) is arranged on the protrusion (32), and the sliding rod (3) is provided with flanging (33) extending to the direction of protrusion (32) on both sides, and the flanging (33) and protrusion (32) form sliding groove for the sliding of guide element (112).

6. The height adjustment device of a headrest according to claim 1 or 2, characterized in that, The rear side of the headrest (2) is integrally provided with a connecting seat (21), the connecting seat (21) is provided with two oppositely arranged connecting ears (211), the upper end of the sliding rod (3) is provided with a connecting rod (35), the connecting rod (35) is located between the two connecting ears (211) and is connected with the connecting ears (211) through a hinge shaft.

7. The height adjustment device of a headrest according to claim 6, characterized in that, The side of the sliding rod (3) close to the headrest (2) is provided with a positioning block (36) to abut against the connecting seat (21) and position the headrest (2) when the headrest (2) is flipped forward.

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