Seat headrest device capable of being adjusted front and back

Abstract

The invention belongs to the field of office furniture, and discloses a seat headrest device capable of being adjusted front and back, the seat headrest device comprises a support assembly and a headrest assembly arranged on the support assembly, the support assembly comprises a chair back mounting mechanism and a front and back adjusting mechanism, the chair back mounting mechanism is used for being connected with a chair back, and the headrest assembly is arranged on the support assembly. The front-and-back adjusting mechanism comprises a base connected with the chair back mounting mechanism and a movable seat in front-and-back sliding fit with the base, a locking piece and an elastic piece are arranged on the base, the locking piece is movably matched with the base, a gear groove structure is arranged on the movable seat, the locking piece is in locking fit with the gear groove structure, and the elastic piece is arranged on the movable seat. And the elastic piece compresses the locking piece. The front-and-back adjusting mechanism is provided with the base, the movable seat, the locking piece, the elastic piece and other structures, front-and-back adjustment of the headrest can be achieved, the locking and unlocking functions are achieved, and operation is convenient.

Description

Technical Field

[0001] The invention relates to the field of office furniture, in particular to a seat headrest device which can be adjusted forwards and backwards. Background Art

[0002] Currently, many office chairs are equipped with headrest devices, but these headrest devices can usually only be adjusted by rotation and lack the function of front and back adjustment.

[0003] Based on the above problems, the applicant proposes a seat headrest device that can be adjusted forward and backward. Summary of the invention

[0004] The object of the present invention is to provide a seat headrest device which can be adjusted forward and backward to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A seat headrest device that can be adjusted forward and backward includes a bracket assembly and a headrest assembly arranged on the bracket assembly, the bracket assembly includes a seat back mounting mechanism and a forward and backward adjustment mechanism, the seat back mounting mechanism is used to connect with the seat back, the forward and backward adjustment mechanism includes a base connected to the seat back mounting mechanism and a movable seat that slides forward and backward with the base, the headrest assembly is arranged on the movable seat, a locking piece and an elastic piece are arranged on the base, the locking piece is movably matched with the base, a gear slot structure is arranged on the movable seat, the locking piece is locked with the gear slot structure, and the elastic piece presses the locking piece.

[0006] Furthermore, the headrest assembly is connected to the movable seat in a pitching and rotational manner, and the base is connected to the seat back mounting mechanism in a pitching and rotational manner.

[0007] Furthermore, the seat back mounting mechanism includes a support frame connected to the front-rear adjustment mechanism and a seat back mounting member arranged on the support frame. The seat back mounting member is used to be connected to the seat back, and its height position on the support frame can be adjusted.

[0008] Furthermore, a locking pin is provided on the locking member, and the main body of the gear slot structure is a long strip slot structure arranged along the front-to-back direction, on which a plurality of inclined slots are arranged along the front-to-back direction, and the slot openings of the inclined slots are arranged rearward, and the locking pin is inserted into the inclined slots to achieve locking, and the elastic member presses the locking pin in the inclined slots through elastic force, and when the movable seat slides forward on the base, the locking pin withdraws from the previous inclined slot and is inserted into the subsequent inclined slot under the elastic force of the elastic member.

[0009] Furthermore, the locking member is rotatably connected to the base, the locking member is provided with an interference portion and a limit pin coaxial with the locking pin, an unlocking guide surface is provided on the rear side of the movable seat, and the elastic member is a spring sheet structure, which includes an elastic member pressing portion and an elastic member stopping portion, the elastic member pressing portion is closer to the inclined groove than the elastic member stopping portion, and the elastic member pressing portion presses the locking pin in the inclined groove through elastic force, and when the movable seat slides forward to the bottom on the base, the interference portion of the locking member is against the unlocking guide surface, and the unlocking guide surface guides the locking member to move in the direction of making the locking pin disengage from the inclined groove, so that the locking pin disengages from the inclined groove, the limit pin disengages from the elastic member pressing portion, and the limit pin is against the elastic member stopping portion, so as to achieve unlocking, and the elastic member stopping portion blocks the locking pin from returning to the inclined groove by cooperating with the limit pin.

[0010] Furthermore, a locking guide surface is provided on the front side of the gear slot structure. When the movable seat is unlocked and slides backward to the bottom on the base, the limit pin abuts against the locking guide surface. The locking guide surface guides the limit pin to rotate toward one side of the inclined slot and inserts the locking pin into the inclined slot. At the same time, the limit pin also passes over the elastic member blocking part and is connected to the elastic member pressing part.

[0011] Furthermore, an arc-shaped limiting groove is provided on the base, and a limiting pin coaxial with the locking pin is provided on the locking member, and the limiting pin is slidably matched with the limiting groove to limit the rotation range of the locking member.

[0012] Furthermore, a mounting groove is provided on the base, the mounting groove is connected with the limiting groove up and down, the elastic member is embedded in the mounting groove, and the limiting pin extends into the mounting groove and is connected with the elastic member.

[0013] Furthermore, a base installation cavity is provided on the base, a movable seat installation cavity is provided on the movable seat, the base passes through the movable seat installation cavity, and the movable seat passes through the base installation cavity.

[0014] Furthermore, the movable seat comprises an upper cover plate and a bottom plate which are detachably connected to each other, and a movable seat installation cavity is formed therebetween, and the bottom plate passes through the base installation cavity.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the front and rear adjustment mechanism of the present invention is provided with a base, a movable seat, a locking member, an elastic member and other structures, which can realize the front and rear adjustment of the headrest, has locking and unlocking functions, and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the longitudinal cross-sectional structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the decomposition structure of the present invention.

[0019] Figure 4 This is one of the schematic diagrams of the base structure in the present invention.

[0020] Figure 5 This is the second schematic diagram of the base structure in the present invention.

[0021] Figure 6 It is a schematic diagram of the connection structure of the base, locking member, elastic member and bottom plate in the present invention.

[0022] Figure 7 It is a schematic diagram of the connection structure of the locking member, the elastic member and the base plate in the present invention.

[0023] Figure 8 This is one of the schematic diagrams of the bottom plate structure of the present invention.

[0024] Fig. 9 This is the second schematic diagram of the bottom plate structure of the present invention.

[0025] Fig.10 It is a schematic diagram of the structure of the upper cover plate in the present invention.

[0026] Fig.11 It is a schematic diagram of the locking member structure in the present invention.

[0027] Fig.12 It is a schematic diagram of the elastic member structure in the present invention.

[0028] In the figure: base 1, limiting groove 100, mounting groove 101, base mounting cavity 102, upper cover plate 2, locking member 3, locking pin 300, interference portion 301, limiting pin 302, swinging portion 303, elastic member 4, elastic member pressing portion 400, elastic member blocking portion 401, bottom plate 5, gear slot structure 500, inclined groove 501, unlocking guide surface 502, locking guide surface 503, movable seat mounting cavity 6, headrest assembly 7, support frame 8, chair back mounting member 9. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 12A seat headrest device that can be adjusted forward and backward includes a bracket assembly and a headrest assembly 7 arranged on the bracket assembly, the bracket assembly includes a seat back mounting mechanism and a forward and backward adjustment mechanism, the seat back mounting mechanism is used to connect with the seat back, the forward and backward adjustment mechanism includes a base 1 connected to the seat back mounting mechanism and a movable seat that slides forward and backward with the base 1, the headrest assembly 7 is arranged on the movable seat, a locking member 3 and an elastic member 4 are arranged on the base 1, the locking member 3 is movably matched with the base 1, a gear slot structure 500 is arranged on the movable seat, the locking member 3 is locked with the gear slot structure 500, and the elastic member 4 presses the locking member 3.

[0031] Continue reading Figure 2-Figure 10 In one embodiment of the present invention, the movable seat includes an upper cover plate 2 and a bottom plate 5 connected by fasteners, and a movable seat installation cavity 6 is formed between the two. A base installation cavity 102 that passes through the front and back is set on the base 1. The base 1 passes through the movable seat installation cavity 6, the bottom plate 5 passes through the base installation cavity 102, and the upper cover plate 2 is located at the upper end of the base 1. The gear slot structure 500 is set on the upper surface of the bottom plate 5.

[0032] Continue reading Figure 6-Figure 12 In one embodiment of the present invention, the locking member 3 includes an L-shaped swinging portion 303 and a resisting portion 301, the connection between the swinging portion 303 and the resisting portion 301 is vertically rotatably connected to the base 1, the resisting portion 301 is arranged to the right relative to the rotation center of the locking member 3, the length of the swinging portion 303 is greater than the length of the resisting portion 301, and the swinging portion 303 faces forward and the resisting portion 301 faces backward, a locking pin 300 is arranged on the lower surface of the swinging portion 303, and a limit pin 302 is arranged on the upper surface, the locking pin 300 and the limit pin 302 are arranged coaxially, and the locking pin 300 and the limit pin 302 can be regarded as one. The main body of the gear slot structure 500 is a long strip slot structure arranged along the front-to-back direction, on which a plurality of inclined slots 501 are arranged at intervals along the front-to-back direction, and the slot openings of the inclined slots 501 are arranged rearward, and the locking pin 300 is inserted into the inclined slot 501 to achieve locking, and the elastic member 4 presses the locking pin 300 into the inclined slot 501 through elastic force, and when the movable seat slides forward on the base 1, the locking pin 300 withdraws from the previous inclined slot 501 and is inserted into the subsequent inclined slot 501 under the elastic force of the elastic member 4, thereby achieving forward adjustment of the headrest.

[0033] Continue reading Figure 6-Figure 12In one embodiment of the present invention, an unlocking guide surface 502 inclined from the right front to the left rear is provided on the rear side of the bottom plate 5. The unlocking guide surface 502 is preferably an inclined surface, and a curved surface may also be used. The elastic member 4 is a spring sheet structure, which includes an elastic member pressing portion 400 and an elastic member blocking portion 401. The elastic member pressing portion 400 and the elastic member blocking portion 401 are bent and connected. The elastic member pressing portion 400 is relatively straight in the left and right directions, and the elastic member blocking portion 401 is inclined toward the left front relative to the elastic member pressing portion 400. The elastic member pressing portion 400 is closer to the inclined groove 501 than the elastic member blocking portion 401. The elastic member pressing portion 400 presses the locking pin 300 into the inclined groove 501 through elastic force. When the movable seat slides forward to the bottom on the base 1, the abutment portion 301 of the locking member 3 abuts against the unlocking guide surface 502. The unlocking guide surface 502 guides the locking member 3 to rotate in the direction of making the locking pin 300 disengage from the inclined groove 501, so that the locking pin 300 disengages from the inclined groove 501, and the limit pin 302 disengages from the elastic member pressing portion 400, and the locking pin 300 abuts against the elastic member blocking portion 401 to achieve unlocking. At this time, the locking pin 300 is blocked from returning to the inclined groove 501 by the cooperation between the elastic member blocking portion 401 and the limit pin 302.

[0034] Continue reading Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.11 In one embodiment of the present invention, a locking guide surface 503 inclined from the left rear to the right front is provided on the front side of the gear slot structure 500. The locking guide surface 503 is located on the left side of the inclined slot 501. The locking guide surface 503 is preferably an inclined surface, and a curved surface can also be used. When the movable seat is unlocked and slides backward to the bottom on the base 1, the limit pin 302 abuts against the locking guide surface 503, and the locking guide surface 503 guides the limit pin 302 to rotate toward the side of the inclined slot 501, so that the locking pin 300 is inserted into the inclined slot 501, and the locking is realized again.

[0035] Continue reading Figure 3 , Figure 4 , Figure 5 , Figure 6 , Fig.11 In one embodiment of the present invention, a limiting groove 100 is provided at the upper end of the base mounting cavity 102 of the base 1. The limiting groove 100 is an arc-shaped groove structure, which coincides with the moving arc trajectory of the limiting pin 302. The limiting pin 302 is slidably plugged into the limiting groove 100. The limiting groove 100 limits the rotation range of the locking member 3 so that the limiting pin 302 will not escape the control of the elastic member 4.

[0036] Continue reading Figure 5 and Figure 6In one embodiment of the present invention, the base 1 is provided with a mounting groove 101 at the upper end of the base mounting cavity 102, the mounting groove 101 is connected with the limiting groove 100 up and down, the elastic member 4 is embedded in the mounting groove 101, and the limiting pin 302 extends into the mounting groove 101 and is connected with the elastic member 4.

[0037] Continue reading Figure 1 In one embodiment of the present invention, the chair back mounting mechanism includes a support frame 8 connected to the front and rear adjustment mechanism and a chair back mounting member 9 arranged on the support frame 8. The chair back mounting member 9 is used to connect with the chair back, and its height position on the support frame 8 can be adjusted. Specifically, the chair back mounting member 9 is slidably mounted on the support frame 8 up and down, and the chair back mounting member 9 is locked with the support frame 8 by a conventional locking mechanism. The method for implementing the height adjustment of the chair back mounting member 9 on the support frame 8 is a well-known technology in the art and will not be elaborated on.

[0038] Continue reading Figure 1 In one embodiment of the present invention, the headrest assembly 7 is connected to the upper cover plate 2 of the movable seat in a manner known in the art to achieve a pitch rotation connection, and the lower end of the base 1 is connected to the support frame 8 of the seat back mounting mechanism in a manner known in the art to achieve a pitch rotation connection.

[0039] The operation of adjusting the front and rear position of the headrest of the present invention is as follows: Under normal circumstances, the locking member 3 is inserted into the inclined groove 501 under the action of the elastic member 4 to achieve locking. Since the opening of the inclined groove 501 is inclined toward the left rear, the movable seat can move forward relative to the base 1 but cannot move backward. When the movable seat moves forward, the locking pin 300 first disengages from the previous inclined groove 501 (when the locking pin 300 disengages from the inclined groove 501, the limit pin 302 does not disengage from the elastic member pressing portion 400), and then inserts into the next inclined groove 501 under the elastic force of the elastic member pressing portion 400, thereby realizing the step-by-step adjustment of the headrest forward. When the movable seat slides forward to the bottom on the base 1, the abutment portion 301 of the locking member 3 abuts against the unlocking guide surface 502. As the movable seat moves forward, the unlocking guide surface 502 guides the locking member 3 to rotate in the direction of disengaging the locking pin 300 from the inclined groove 501, so that the locking pin 300 disengages from the inclined groove 501, and the limit pin 302 disengages from the elastic member pressing portion 400, and the locking pin 300 abuts against the elastic member blocking portion 401, thereby achieving unlocking. At this time, the present invention blocks the locking pin 300 from returning to the inclined groove 501 through the cooperation between the elastic member blocking portion 401 and the limit pin 302. Then, the movable seat is slid backward on the base 1 to the bottom. At this time, the limit pin 302 is against the locking guide surface 503. When the movable seat moves backward, the locking guide surface 503 guides the limit pin 302 to rotate toward the side of the inclined groove 501 and inserts the locking pin 300 into the inclined groove 501. At the same time, the limit pin 302 also passes over the elastic member blocking portion 401 and is connected to the elastic member pressing portion 400. The elastic member pressing portion 400 presses the locking pin 300 in the inclined groove 501 again. At this time, the front and rear adjustment mechanism is locked again.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A seat headrest device that can be adjusted forward and backward, comprising a bracket assembly and a headrest assembly (7) arranged on the bracket assembly, characterized in that: The support assembly comprises a seat back mounting mechanism and a front-rear adjustment mechanism, wherein the seat back mounting mechanism is used to connect to the seat back, and the front-rear adjustment mechanism comprises a base (1) connected to the seat back mounting mechanism and a movable seat that slides forward and backward with the base (1), wherein the headrest assembly (7) is arranged on the movable seat, wherein a locking member (3) and an elastic member (4) are arranged on the base (1), wherein the locking member (3) is movably engaged with the base (1), wherein a gear slot structure (500) is arranged on the movable seat, wherein the locking member (3) is locked with the gear slot structure (500), and wherein the elastic member (4) presses the locking member (3).

2. A seat headrest device that can be adjusted forward and backward according to claim 1, characterized in that: The headrest assembly (7) is connected to the movable seat in a pitching and rotational manner, and the base (1) is connected to the seat back mounting mechanism in a pitching and rotational manner.

3. The seat headrest device that can be adjusted forward and backward according to claim 1, characterized in that: The chair back mounting mechanism comprises a support frame (8) connected to a front-rear adjustment mechanism and a chair back mounting member (9) arranged on the support frame (8); the chair back mounting member (9) is used to be connected to the chair back, and its height position on the support frame (8) can be adjusted.

4. The seat headrest device that can be adjusted forward and backward according to claim 1, characterized in that: The locking member (3) is provided with a locking pin (300). The main body of the gear slot structure (500) is a long strip slot structure arranged along the front-to-back direction. A plurality of inclined slots (501) are arranged on the gear slot structure along the front-to-back direction. The slot openings of the inclined slots (501) are arranged rearward. The locking pin (300) is inserted into the inclined slot (501) to achieve locking. The elastic member (4) presses the locking pin (300) into the inclined slot (501) through elastic force. When the movable seat slides forward on the base (1), the locking pin (300) withdraws from the previous inclined slot (501) and is inserted into the next inclined slot (501) under the elastic force of the elastic member (4).

5. The seat headrest device that can be adjusted forward and backward according to claim 4, characterized in that: The locking member (3) is rotatably connected to the base (1); a resisting portion (301) and a limiting pin (302) coaxial with the locking pin (300) are provided on the locking member (3); an unlocking guide surface (502) is provided on the rear side of the movable seat; the elastic member (4) is a spring sheet structure, comprising an elastic member pressing portion (400) and an elastic member stopping portion (401); the elastic member pressing portion (400) is closer to the inclined groove (501) than the elastic member stopping portion (401); the elastic member pressing portion (400) presses the locking pin (300) into the inclined groove (501) by elastic force; and the movable seat is disposed on the base. (1) When the locking member (3) slides forward to the bottom, the abutment portion (301) of the locking member (3) abuts against the unlocking guide surface (502), and the unlocking guide surface (502) guides the locking member (3) to move in a direction to make the locking pin (300) disengage from the inclined groove (501), so that the locking pin (300) disengages from the inclined groove (501), the limiting pin (302) disengages from the elastic member pressing portion (400), and the limiting pin (302) abuts against the elastic member blocking portion (401), thereby achieving unlocking, and the elastic member blocking portion (401) blocks the locking pin (300) from returning to the inclined groove (501) by cooperating with the limiting pin (302).

6. The seat headrest device that can be adjusted forward and backward according to claim 5, characterized in that: A locking guide surface (503) is provided on the front side of the shift slot structure (500). When the movable seat is unlocked and slides backward to the bottom on the base (1), the limit pin (302) abuts against the locking guide surface (503). The locking guide surface (503) guides the limit pin (302) to rotate toward the side of the inclined slot (501) and allows the locking pin (300) to be inserted into the inclined slot (501). At the same time, the limit pin (302) also passes over the elastic member blocking portion (401) and is connected to the elastic member pressing portion (400).

7. The seat headrest device adjustable forward and backward according to claim 4, characterized in that: The base (1) is provided with an arc-shaped limiting groove (100), and the limiting pin (302) is slidably matched with the limiting groove (100) to limit the rotation range of the locking member (3).

8. The seat headrest device that can be adjusted forward and backward according to claim 7, characterized in that: The base (1) is provided with a mounting groove (101), the mounting groove (101) is connected with the limiting groove (100) in an upper and lower direction, the elastic member (4) is embedded in the mounting groove (101), and the limiting pin (302) extends into the mounting groove (101) and is connected with the elastic member (4).

9. The seat headrest device that can be adjusted forward and backward according to claim 1, characterized in that: The base (1) is provided with a base installation cavity (102), the movable seat is provided with a movable seat installation cavity (6), the base (1) passes through the movable seat installation cavity (6), and the movable seat passes through the base installation cavity (102).

10. The seat headrest device adjustable forward and backward according to claim 9, characterized in that: The movable seat comprises an upper cover plate (2) and a bottom plate (5) which are detachably connected to each other, and a movable seat installation cavity (6) is formed between the upper cover plate (2) and the bottom plate (5) passes through the base installation cavity (102).

Images