Seat armrest hinge

Abstract

The utility model relates to a seat armrest hinge which comprises a first hinge arm and a second hinge arm, the first hinge arm and the second hinge arm are hinged through a hinge shaft, a gear shifting piece is arranged on one side of the hinge shaft between the first hinge arm and the second hinge arm, and a swing hole for installing the gear shifting piece is formed in the first hinge arm. An initial swing position and an end point swing position for stopping the gear shifting piece are arranged in the swing hole; the second hinge arm is provided with a gear shifting hole for installation of the gear shifting piece, and an initial gear, a middle gear and a terminal gear for gear shifting and stopping of the gear shifting piece are arranged in the gear shifting hole. On the premise that a stable and reliable gear adjusting function is guaranteed, the use amount of parts and the production and machining cost can be reduced.

Description

Technical Field

[0001] The present application relates to the field of hinges, and in particular to a seat armrest hinge. Background Art

[0002] Seat armrest hinges are common on some seats that require adjustable armrests. They are installed between the seat armrest and the seat body. Common traditional seat armrest hinges include two articulated arms hinged to each other. A gear adjustment structure is usually designed between the articulated arms at the hinge. It is generally used to set a gear adjustment disk between the two articulated arms, and adjustment teeth are arranged along the circumference between the opposite end faces of the two gear adjustment disks. The gear adjustment is achieved by the mutual engagement of the adjustment teeth of the gear adjustment disk between the two articulated arms.

[0003] However, the inventor believes that this hinge adjustment structure requires more assembly parts in application. In order to ensure that there is a gap between the gear adjustment plates for mutual rotation and to ensure the gear limiting function, some additional damping parts and elastic parts will be added. The more parts are assembled, the larger the volume and weight of the parts will be. In addition, in order to better fit between the parts, the processing requirements of the parts will increase accordingly. This not only increases the number of parts, but also increases the production cost accordingly. Utility Model Content

[0004] In order to reduce the use of parts and production costs while ensuring a safe and reliable gear adjustment function.

[0005] The present application provides a seat armrest hinge, which adopts the following technical solution:

[0006] A seat armrest hinge comprises a first articulated arm and a second articulated arm, the first articulated arm and the second articulated arm are articulated via an articulated shaft, a shifting member is arranged between the first articulated arm and the second articulated arm on one side of the articulated shaft, the first articulated arm is provided with a swing hole for installing the shifting member, the swing hole is provided with an initial swinging position and a terminal swinging position for the shifting member to stop; the second articulated arm is provided with a shifting hole for installing the shifting member, the shifting hole is provided with an initial gear position, an intermediate gear position and a terminal gear position for the shifting member to shift and stop.

[0007] Optionally, an elastic pressing area and a swinging area of ​​the shift adjusting member are provided in the swing hole, an elastic pressing member is installed in the elastic pressing area, a pressing end of the elastic pressing member extends into the swinging area, and the pressing end abuts against the end face of the shift adjusting member in the swinging area.

[0008] Optionally, the swing hole in the swing zone includes a supporting groove, an initial docking groove, and a terminal docking groove, the supporting groove is close to the hinge shaft side, the initial docking groove and the terminal swinging groove are located on the side away from the hinge shaft, and the initial docking groove is located on the adjacent side of the terminal docking groove; the adjacent groove walls of the initial docking groove and the terminal docking groove are smoothly transitioned through an arc transition surface; the bottom end of the gear adjusting member is located on one side of the supporting groove, and the top end is located on one side of the initial docking groove or the terminal docking groove.

[0009] Optionally, the shift adjusting member is a shift adjusting block, a groove is provided in the middle of the shift adjusting block, and the groove is snap-fitted with the supporting groove.

[0010] Optionally, the elastic pressing area includes a mounting groove of the elastic pressing piece, a connecting groove connecting the mounting groove and the swinging area, the elastic pressing piece is installed in the mounting groove, and the pressing end of the elastic pressing piece extends through the connecting groove to the swinging area.

[0011] Optionally, the elastic pressure member includes an arc-shaped elastic mounting plate and an elastic extension plate, the elastic mounting plate is adapted to be installed in the mounting groove, one end of the elastic extension plate is connected to the end of the elastic mounting plate, and the other end extends to the swing area through the connecting groove, and the end of the elastic extension plate located in the swing area is bent toward the direction of the hinge axis to form a pressure portion, and the pressure portion abuts against the end face of the gear adjusting member.

[0012] Optionally, the gear shift hole includes a stay slot, an initial gear slot, an intermediate gear slot and a terminal gear slot, the stay slot is close to the hinge shaft, the initial gear slot, the intermediate gear slot and the terminal gear slot are located on the side away from the hinge shaft, and the intermediate gear slot is located between the initial gear slot and the terminal gear slot; when the gear shift member is at the initial gear position, the top end of the gear shift member is located at the side of the initial gear slot, and the bottom end is located at the side close to the stay slot; when the gear shift member is at the intermediate gear position, the top end of the gear shift member is located at the side of the intermediate gear slot, and the bottom end is located at the side close to the stay slot; when the gear shift member is at the terminal gear position, the top end of the gear shift member is located at the side of the terminal gear slot, and the bottom end is located at the side of the stay slot.

[0013] Optionally, when at least one intermediate gear slot is provided and at least two intermediate gear slots are provided, the slot walls of adjacent intermediate gear slots are smoothly transitioned through an arc-shaped transition surface; an angle greater than 90 degrees is formed between the adjacent slot walls of the initial gear slot and the adjacent intermediate gear slots; and a smooth transition is made between the adjacent slot walls of the terminal gear slot and the adjacent intermediate gear slots through an arc-shaped transition surface.

[0014] Optionally, the groove wall on the same side of the retention groove and the initial gear groove is smoothly transitioned through an arc transition surface; the groove wall on the same side of the retention groove and the terminal gear groove is connected through a transition protrusion, and the cross-section of the transition protrusion is triangular or trapezoidal.

[0015] Optionally, a middle hinge plate is provided at the hinge end of the first hinge arm, and two side hinge plates are fixedly installed on both sides of the hinge end of the second hinge arm, the middle hinge plate is located between the two side hinge plates, the middle hinge plate and the two side hinge plates are installed on the hinge shaft, the shifting part is located between the middle hinge plate and the two side hinge plates on one side of the hinge shaft, the swing hole is provided in the middle hinge plate, and the shifting holes are respectively provided in the corresponding side hinge plates.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: by improving the structure of the first articulated arm and the second articulated arm, and utilizing the cooperation of the swing hole, the gear adjustment hole and the gear adjustment member, on the one hand, the space usage requirement of the hinge is compressed as much as possible, so that the space occupied by the hinge is smaller and the overall structure is lighter; on the other hand, the amount of parts used is reduced, so that the production cost is also greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the exploded structure of a seat armrest hinge according to an embodiment of the present application.

[0018] Figure 2 This is one of the partial structural schematic diagrams of a seat armrest hinge according to an embodiment of the present application, and is used to illustrate the coordination between the shift adjusting member and the shift adjusting hole structure.

[0019] Figure 3 This is the second partial structural schematic diagram of a seat armrest hinge according to an embodiment of the present application, which is used to demonstrate the coordination between the gear adjustment member and the swing hole structure.

[0020] Explanation of the reference numerals in the accompanying drawings: 1. first articulated arm; 2. second articulated arm; 3. articulated shaft; 4. gear adjusting member; 5. swing hole; 6. gear adjusting hole; 7. middle hinge plate; 8. side hinge plate; 9. support groove; 10. initial stop groove; 11. terminal stop groove; 12. arc-shaped transition surface; 13. groove; 14. mounting groove; 15. connecting groove; 16. elastic mounting plate; 17. elastic extension plate; 18. pressing portion; 19. stay groove; 20. initial gear position groove; 21. intermediate gear position groove; 22. terminal gear position groove; 23. transition protrusion. DETAILED DESCRIPTION

[0021] The following is combined with Figures 1 to 3 This application is described in further detail.

[0022] The present application embodiment discloses a seat armrest hinge. Figure 1, including a first articulated arm 1 and a second articulated arm 2, the first articulated arm 1 and the second articulated arm 2 are hingedly connected by an articulated shaft 3, a gear adjusting member 4 is arranged between the first articulated arm 1 and the second articulated arm 2 on one side of the articulated shaft 3, the first articulated arm 1 is provided with a swing hole 5 for installing the gear adjusting member 4, the swing hole 5 is provided with an initial swing position and a terminal swing position for the gear adjusting member 4 to stop; the second articulated arm 2 is provided with a gear adjusting hole 6 for installing the gear adjusting member 4, the gear adjusting hole 6 is provided with an initial gear position, an intermediate gear position and a terminal gear position for the gear adjusting member 4 to shift and stop; of course, a middle articulated plate 7 can be arranged at the articulated end of the first articulated arm 1, and two side articulated plates 7 can be fixedly installed on both sides of the articulated end of the second articulated arm 2 Disk 8, the middle hinge disk 7 is located between the two side hinge disks 8, the middle hinge disk 7 and the two side hinge disks 8 are all installed on the hinge shaft 3, the middle hinge disk 7 and the two side hinge disks 8 rotate relative to each other with the rotation of the first hinge arm 1 and the second hinge arm 2, wherein the shifting member 4 is located between the middle hinge disk 7 and the two side hinge disks 8 on one side of the hinge shaft 3, and the swing hole 5 is arranged in the middle hinge disk 7, and the shifting holes 6 are respectively arranged in the corresponding side hinge disks 8. In this example, the setting positions of the swing hole 5 and the shifting hole 6 can also be relatively swapped, but the number of parts will increase relatively after the swap. At the same time, when the force arm is designed to 300mm, the pressure that this product can withstand can reach 50KG.

[0023] Reference Figure 2 In this embodiment, an elastic pressing area and a swinging area of ​​the gear adjusting member 4 are provided in the swing hole 5, an elastic pressing member is installed in the elastic pressing area, the pressing end of the elastic pressing member extends into the swinging area, and the pressing end abuts against the end surface of the gear adjusting member 4 in the swinging area; wherein, the swing hole 5 at the swinging area includes a supporting groove 9, an initial stop groove 10, and a terminal stop groove 11, the supporting groove 9 is close to the side of the hinge shaft 3, the initial stop groove 10 and the terminal swinging groove are located on the side away from the hinge shaft 3, and the initial stop groove 10 is located on the side adjacent to the terminal stop groove 11; at the same time, in order to enable the gear adjusting member 4 to be more It can smoothly swing between the two docking grooves, and can smoothly transition between the adjacent groove walls of the initial docking groove 10 and the terminal docking groove 11 through the arc transition surface 12; in the initial position, the bottom end of the shift adjusting member 4 is located on the side of the support groove 9, and the top end is located on the side of the initial docking groove 10, and in the terminal position, the top end of the shift adjusting member 4 is located on the side of the terminal docking groove 11. In this embodiment, the shift adjusting member 4 is a shift adjusting block, and in order to ensure a more stable fit between the shift adjusting member 4 and the support groove 9, a groove 13 can be provided in the middle of the shift adjusting block, and the groove 13 is snap-fitted with the support groove 9.

[0024] The elastic pressing area mentioned above includes the mounting groove 14 of the elastic pressing member, and the connecting groove 15 connecting the mounting groove 14 and the swinging zone. The elastic pressing member is installed in the mounting groove 14, and the pressing end of the elastic pressing member extends to the swinging zone through the connecting groove 15. The elastic pressing member in this embodiment includes an arc-shaped elastic mounting plate 16 and an elastic extension plate 17. In order to install more firmly, the elastic mounting plate 16 is adapted to be installed in the mounting groove 14, one end of the elastic extension plate 17 is connected to the end of the elastic mounting plate 16, and the other end extends to the swinging zone through the connecting groove 15, and the end of the elastic extension plate 17 located in the swinging zone is bent toward the direction of the hinge shaft 3 to form a pressing portion 18, and the pressing portion 18 abuts against the end face of the gear adjusting member 4.

[0025] Reference Figure 3 In this embodiment, the gear adjustment hole 6 includes a stay groove 19, an initial gear groove 20, an intermediate gear groove 21 and a terminal gear groove 22. The stay groove 19 is close to the side of the hinge shaft 3, the initial gear groove 20, the intermediate gear groove 21 and the terminal gear groove 22 are located on the side away from the hinge shaft 3, and the intermediate gear groove 21 is located between the initial gear groove 20 and the terminal gear groove 22; wherein, at least one intermediate gear groove 21 is provided, and when at least two intermediate gear grooves 21 are provided, the groove walls of adjacent intermediate gear grooves 21 are smoothly transitioned through the arc transition surface 12; generally, the connecting line between the initial gear groove 20, the intermediate gear groove 21 and the terminal gear groove 22 can be an arc trajectory, and the initial gear groove 20 and the adjacent groove walls of the adjacent intermediate gear groove 21 form an angle greater than 90 degrees; the terminal gear groove 22 and the adjacent groove walls of the adjacent intermediate gear groove 21 are smoothly transitioned through the arc transition surface 12.

[0026] When the gear adjusting member 4 is at the initial gear position, the top of the gear adjusting member 4 is located at the side of the initial gear position slot 20, and the bottom is located at the side close to the stop slot 19; when the gear adjusting member 4 is at the intermediate gear position, the top of the gear adjusting member 4 is located at the side of the intermediate gear position slot 21, and the bottom is located at the side close to the stop slot 19; when the gear adjusting member 4 is at the terminal gear position, the top of the gear adjusting member 4 is located at the side of the terminal gear position slot 22, and the bottom is located at the side of the stop slot 19. At this time, the gear adjusting member 4 also swings from the initial stop slot 10 to the terminal stop slot 11. When the gear adjusting member 4 swings from the initial stop slot 10 to the terminal stop slot 11, it can be achieved by the following structure: the groove wall on the same side of the stop slot 19 and the initial gear position slot 20 is connected by an arc transition The surface 12 has a smooth transition; the groove walls on the same side of the retention groove 19 and the terminal gear groove 22 are connected by a transition protrusion 23, and the cross-section of the transition protrusion 23 is triangular or trapezoidal. In the process of the shift adjusting member 4 swinging from the initial stop groove 10 to the terminal stop groove 11, as the force generated during the relative articulation rotation of the first articulated arm 1 and the second articulated arm 2, the transition protrusion 23 can generate a certain thrust on the shift adjusting member 4, prompting the shift adjusting member 4 to swing from the initial stop groove 10 to the terminal stop groove 11. At the same time, in the entire working process of the shift adjusting member 4 swinging from the initial stop groove 10 to the terminal stop groove 11, the shift adjusting member 4 passes through the initial gear groove 20, the intermediate gear groove 21, and the terminal gear groove 22 in sequence.

[0027] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A chair armrest hinge, comprising a first hinged arm (1) and a second hinged arm (2), wherein the first hinged arm (1) and the second hinged arm (2) are hingedly connected via a hinge shaft (3). It is characterized in that A gear shifting member (4) is disposed between the first articulated arm (1) and the second articulated arm (2) on one side of the articulated shaft (3); a swing hole (5) for mounting the gear shifting member (4) is disposed on the first articulated arm (1); an initial swing position and an end swing position for the gear shifting member (4) to stop are disposed in the swing hole (5); and a gear shifting hole (6) for mounting the gear shifting member (4) is disposed in the second articulated arm (2); an initial gear position, an intermediate gear position and an end gear position for the gear shifting member (4) to stop are disposed in the gear shifting hole (6).

2. A seat armrest hinge according to claim 1, It is characterized in that An elastic pressing area and a swinging area of ​​the gear adjusting member (4) are arranged in the swinging hole (5), an elastic pressing member is installed in the elastic pressing area, a pressing end of the elastic pressing member extends into the swinging area, and the pressing end abuts against an end surface of the gear adjusting member (4) in the swinging area.

3. A seat armrest hinge according to claim 2, It is characterized in that The swing hole (5) in the swing zone comprises a support groove (9), an initial stop groove (10), and an end stop groove (11); the support groove (9) is located on a side close to the hinge shaft (3), the initial stop groove (10) and the end swing groove are located on a side away from the hinge shaft (3), and the initial stop groove (10) is located on a side adjacent to the end stop groove (11); adjacent groove walls of the initial stop groove (10) and the end stop groove (11) are smoothly transitioned through an arc-shaped transition surface (12); the bottom end of the gear adjustment member (4) is located on one side of the support groove (9), and the top end is located on one side of the initial stop groove (10) or the end stop groove (11).

4. A seat armrest hinge according to claim 3, It is characterized in that The shift adjusting member (4) is a shift adjusting block, a groove (13) is provided in the middle of the shift adjusting block, and the groove (13) is snap-fitted with the supporting groove (9).

5. A seat armrest hinge according to claim 2, It is characterized in that The elastic pressing area comprises a mounting groove (14) of the elastic pressing piece, a connecting groove (15) connecting the mounting groove (14) and the swinging area, the elastic pressing piece is installed in the mounting groove (14), and the pressing end of the elastic pressing piece passes through the connecting groove (15) and extends to the swinging area.

6. A seat armrest hinge according to claim 5, It is characterized in that The elastic pressure member comprises an arc-shaped elastic mounting plate (16) and an elastic extension plate (17); the elastic mounting plate (16) is adapted to be mounted in the mounting groove (14); one end of the elastic extension plate (17) is connected to the end of the elastic mounting plate (16), and the other end passes through the connecting groove (15) and extends to the swinging area; the end of the elastic extension plate (17) located in the swinging area is bent toward the direction of the hinge shaft (3) to form a pressure portion (18); and the pressure portion (18) is pressed against the end surface of the gear adjusting member (4).

7. The seat armrest hinge according to claim 1, It is characterized in that The gear shift hole (6) comprises a stay slot (19), an initial gear slot (20), an intermediate gear slot (21) and an end gear slot (22); the stay slot (19) is located close to a side of the hinge shaft (3); the initial gear slot (20), the intermediate gear slot (21) and the end gear slot (22) are located on a side away from the hinge shaft (3); the intermediate gear slot (21) is located between the initial gear slot (20) and the end gear slot (22); when the gear shift member (4) is located at the initial gear position, the top end of the gear shift member (4) is located at a side of the initial gear slot (20) and the bottom end is located at a side close to the stay slot (19); when the gear shift member (4) is located at the intermediate gear position, the top end of the gear shift member (4) is located at a side of the intermediate gear slot (21) and the bottom end is located at a side close to the stay slot (19); when the gear shift member (4) is located at the end gear position, the top end of the gear shift member (4) is located at a side of the end gear slot (22) and the bottom end is located at a side of the stay slot (19).

8. A seat armrest hinge according to claim 7, It is characterized in that When at least one intermediate gear slot (21) is provided, and when at least two intermediate gear slots (21) are provided, the slot walls of adjacent intermediate gear slots (21) smoothly transition through the arc-shaped transition surface (12); an angle greater than 90 degrees is formed between the adjacent slot walls of the initial gear slot (20) and the adjacent intermediate gear slots (21); and a smooth transition is formed between the adjacent slot walls of the terminal gear slot (22) and the adjacent intermediate gear slots (21) through the arc-shaped transition surface (12).

9. The seat armrest hinge according to claim 7, It is characterized in that The groove walls on the same side of the retention groove (19) and the initial gear groove (20) are smoothly transitioned via an arc-shaped transition surface (12); the groove walls on the same side of the retention groove (19) and the terminal gear groove (22) are connected via a transition protrusion (23), and the cross-section of the transition protrusion (23) is triangular or trapezoidal.

10. The seat armrest hinge according to claim 1, It is characterized in that The hinged end of the first hinged arm (1) is provided with a middle hinged disc (7), and two side hinged discs (8) are fixedly mounted on both sides of the hinged end of the second hinged arm (2), the middle hinged disc (7) is located between the two side hinged discs (8), the middle hinged disc (7) and the two side hinged discs (8) are both mounted on the hinge shaft (3), the adjustment member (4) is located between the middle hinged disc (7) and the two side hinged discs (8) on one side of the hinge shaft (3), the swing hole (5) is provided on the middle hinged disc (7), and the adjustment holes (6) are respectively provided on the corresponding side hinged discs (8).

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