Handrail upwarping mechanism

Abstract

A handrail upwarping mechanism comprises a fixed arm and a rotating seat, the side face of the rotating seat is covered with a pressing plate in a buckled mode, the rotating seat is provided with a core pipe, a gear moving groove and a circular groove, the circle center of the circular groove is located on the axis of the core pipe, a notch is formed in the lower portion of the circular groove, and the upper portion of the fixed arm is a circular ring body; in conclusion, the upwarp angle of the handrail is adjusted through the cooperation of the gear teeth and the circular ring body, when the handrail surface assembly is upwarped, the ratchet portions of the gear teeth move in the ratchet grooves, the guide block portions move along the guide grooves, and when the handrail surface assembly continues to be upwarped, the guide block portions make contact with the slope structures, the gear teeth move upwards, and the ratchet portions are separated from the ratchet grooves; during resetting, the armrest surface assembly is pushed forwards, the hook tooth part of the gear tooth is separated from the hook groove body, and the gear tooth moves downwards and is meshed with the ratchet groove again; the overall structural design is reasonable, the upwarp adjustment of the angle of the armrest can be completed through simple operation, the structural complexity is reduced through the design, and the use stability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of seat armrests, and particularly relates to an armrest up-turning mechanism. Background Art

[0002] A seat is a sitting tool with a backrest, and some also have armrests. An armrest refers to a crossbar or handle used to maintain body balance or support the body, specifically a support component for supporting a human arm and hand, which improves the comfort of a human sitting posture through the armrest. With the development of modern technology, people have higher and higher requirements for the adjustment functions of seats.

[0003] To provide better comfort and support, the armrests of seats are usually designed as up-turning adjustment structures. For example, on seats in airplanes or cinemas, the up-turning of the armrests can prevent the arms of passengers or viewers from hanging in the air when sitting for a long time, thereby reducing fatigue. However, the existing up-turning adjustment mechanisms of armrests have a relatively complex structure and are prone to failure during adjustment, resulting in poor use effects. Summary of the Utility Model

[0004] The utility model aims to provide an armrest up-turning mechanism to solve the technical problems of the complex up-turning adjustment structure and poor use effect of the existing armrests.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An armrest up-turning mechanism includes a fixed arm and a rotating seat. A pressing plate is buckled on the side of the rotating seat. A core tube, a gear moving groove, and a circular groove are arranged on the rotating seat. The center of the circular groove is located on the axis of the core tube. A notch is opened at the lower part of the circular groove. The upper part of the fixed arm is an annular body, which is located in the circular groove and sleeved on the core tube. The lower part of the fixed arm extends downward from the notch, and the annular body can rotate around the core tube.

[0007] A ratchet tooth groove and a guide groove are arranged on the upper part of the annular body. The ratchet tooth groove and the guide groove are arranged side by side. The rear end of the guide groove is a bevel structure.

[0008] The gear moving groove is located above the circular groove. A gear is arranged in the gear moving groove. A movable groove is arranged at the lower part of the rear end of the gear. A ratchet tooth part and a guide block part are arranged at the lower part of the gear. The ratchet tooth part and the guide block part are arranged side by side. The ratchet tooth part can move in the ratchet tooth groove, and the guide block part can move in the guide groove. A hook tooth part is arranged at the front end of the gear.

[0009] The front part of the gear moving groove has a hook groove body, the rear part of the gear moving groove has a rear groove body and a prism surface. The hook tooth part at the front end of the gear cooperates with the hook groove body. The rear end of the gear can move in the rear groove body, and the moving groove on the gear cooperates with the prism surface, so that the gear can swing around the prism surface. A spring is also installed in the gear moving groove, and the spring is connected between the top of the gear and the inner wall of the gear moving groove.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: Through the cooperation of the gear and the circular ring body, the ratchet tooth part and the ratchet tooth groove cooperate to complete the positioning of the armrest, and the guide block part and the guide groove complete the position adjustment of the ratchet tooth. When the armrest surface assembly tilts upward, the ratchet tooth part of the gear moves in the ratchet tooth groove, and the guide block part moves along the guide groove. When continuing to tilt upward, the guide block part contacts the inclined surface structure, the gear moves upward, and the ratchet tooth part disengages from the ratchet tooth groove; when resetting, push the armrest surface assembly forward, the hook tooth part of the gear disengages from the hook groove body, the gear moves downward and meshes with the ratchet tooth groove again; the overall structure is reasonably designed, and the upward tilt adjustment of the armrest angle can be completed through simple operations. Such a design reduces the structural complexity and improves the use stability. Description of the Drawings

[0011] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0012] Figure 1 is a structural schematic diagram of the armrest device;

[0013] Figure 2 is an exploded view of the armrest device;

[0014] Figure 3 is a structural schematic diagram of the armrest upward tilting mechanism;

[0015] Figure 4 is an internal view of the armrest upward tilting mechanism;

[0016] Figure 5 is a front view of the armrest upward tilting mechanism after removing the pressing plate;

[0017] Figure 6 is a connection relationship diagram of the gear and the fixed arm;

[0018] Figure 7 is an installation schematic diagram of the armrest upward tilting mechanism on the armrest device. Detailed Embodiment

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] The present invention will be further described in detail below in conjunction with embodiments.

[0021] A specific embodiment of the handrail up - turning mechanism provided by the present invention:

[0022] As Figure 1 and Figure 2 shown, the handrail up - turning mechanism 100, the handrail surface connection seat 101, the handrail surface assembly 102, the fixed seat 103 of the up - turning part and the handrail rod assembly 104 of the present embodiment together form a handrail device. Among them, the fixed seat 103 of the up - turning part is arranged at the upper end of the handrail rod assembly 104, the handrail surface assembly 102 is installed on the fixed seat 103 of the up - turning part through a rotating shaft 105, the handrail surface assembly 102 can rotate around the rotating shaft 105, the handrail up - turning mechanism 100 is installed in the handrail surface connection seat 101, and the handrail surface assembly 102 is installed on the handrail surface connection seat 101.

[0023] As Figures 3 - 7 shown, the above - mentioned handrail up - turning mechanism 100 includes a fixed arm 1 and a rotating seat 2. A pressing plate 3 is buckled on the side surface of the rotating seat 2. A rectangular groove 4 is arranged on the handrail surface connection seat 101 (as Figure 2 shown). The rotating seat 2 is located in the rectangular groove 4. A core tube 5, a gear - tooth moving groove 6 and a circular groove 7 are arranged on the rotating seat 2. The center of the circular groove 7 is located on the axis of the core tube 5. A notch is opened at the lower part of the circular groove 7. The upper part of the fixed arm 1 is an annular body 8. The annular body 8 is located in the circular groove 7 and the annular body 8 is sleeved on the core tube 5. The lower part of the fixed arm 1 extends downward from the notch. The annular body 8 can rotate around the core tube 5. A slot 9 is arranged in the fixed seat 103 of the up - turning part. The lower end of the fixed arm 1 is inserted into the slot 9. The above - mentioned rotating shaft 105 is inserted into the core tube 5.

[0024] A ratchet - tooth groove 11 and a guiding groove 12 are arranged on the upper part of the annular body 8. The ratchet - tooth groove 11 and the guiding groove 12 are arranged side by side. The rear end of the guiding groove 12 is a bevel structure 13;

[0025] The gear movable groove 6 is located above the circular groove 7, and a gear 14 is arranged in the gear movable groove 6. The lower part of the rear end of the gear 14 has a movable groove 15. The lower part of the gear 14 is provided with a ratchet part 16 and a guide block part 17. The ratchet part 16 and the guide block part 17 are arranged side by side. The ratchet part 16 can move in the ratchet groove 11, and the guide block part 17 can move in the guide groove 12. The front end of the gear 14 is provided with a hook tooth part 18;

[0026] The front part of the gear movable groove 6 has a hook groove body 19, and the rear part of the gear movable groove 6 has a rear groove body 20 and a prismatic surface 21. The hook tooth part 18 at the front end of the gear 14 cooperates with the hook groove body 19, and the rear end of the gear 14 can move in the rear groove body 20, and the movable groove 15 on the gear 14 cooperates with the prismatic surface 21, so that the gear 14 can swing around the prismatic surface 21. A spring 22 is also installed in the gear movable groove 6, and the spring 22 is connected between the top of the gear 14 and the inner wall of the gear movable groove 6.

[0027] In the initial state, under the elastic force of the spring 22, the ratchet portion 16 at the lower part of the gear 14 forms a meshing state with the ratchet groove 11 of the annular body 8. When the armrest surface assembly 102 is tilted upward, the armrest surface connecting seat 101 rotates with the rotating seat 2 around the rotating axis 105, and the fixed arm 1 is relatively fixed on the upward fixed seat 103. The rotating seat 2 rotates clockwise relative to the annular body 8. During the rotation, the ratchet portion 16 of the gear 14 moves in the ratchet groove 11, and the guide block portion 17 moves backward in the guide groove 12. Under the elastic force of the spring 22, the ratchet portion 16 always maintains a meshing state with the ratchet groove 11 to form a positioning of the upward angle. When the armrest surface assembly 102 continues to be tilted backward, the armrest surface connecting seat 101 rotates with the rotating seat 2 around the rotating axis 105. When the component 102 is formed, the guide block portion 17 begins to contact the inclined surface structure 13 at the rear end of the guide groove 12. Due to the obstruction of the inclined surface structure 13, the gear 14 tends to move forward in the gear movable groove 6, and the inclined surface structure 13 has a guiding function. The inclined surface structure 13 will gradually push the guide block portion 17, so that the gear 14 tends to move upward. Finally, the gear 14 moves forward, and the hook tooth portion 18 at the front end of the gear tooth 14 enters the hook groove body 19, and the gear tooth 14 moves upward and compresses the spring 22. After the gear tooth 14 moves upward, the ratchet portion 16 of the gear tooth 14 disengages from the ratchet groove 11, and the two are released from the meshing state. At this time, the ratchet groove 11 will not affect the rotation of the rotating seat 2.

[0028] When the armrest surface assembly 102 needs to be reset, the armrest surface assembly 102 is pushed forward, and the guide block portion 17 moves forward to the front end of the guide groove 12. Due to the obstruction of the front end of the guide groove 12, the gear 14 moves backward, and the hook tooth portion 18 of the gear 14 disengages from the hook groove body 19 backward, and under the elastic force of the spring 22, the gear 14 moves downward, and the ratchet portion 16 re-engages with the ratchet groove 11 to return to the initial state.

[0029] It should be noted that in this text, terms such as "including", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such a process, method, article or device.

[0030] Although embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An armrest tilting mechanism, characterized in that: It includes a fixed arm and a rotating seat, the side of the rotating seat is covered with a pressure plate, the rotating seat is provided with a core tube, a gear movable groove and a circular groove, the center of the circular groove is located on the axis of the core tube, a notch is opened at the lower part of the circular groove, the upper part of the fixed arm is a circular ring body, the circular ring body is located in the circular groove, and the circular ring body is sleeved on the core tube, the lower part of the fixed arm extends downward from the notch, and the circular ring body can rotate around the core tube; A ratchet groove and a guide groove are arranged on the upper part of the annular body, the ratchet groove and the guide groove are arranged side by side, and the rear end of the guide groove is an inclined surface structure; The gear tooth movable groove is located above the circular groove, a gear tooth is arranged in the gear tooth movable groove, a movable groove is provided at the lower part of the rear end of the gear tooth, a ratchet tooth part and a guide block part are arranged at the lower part of the gear tooth, the ratchet tooth part and the guide block part are arranged side by side, the ratchet tooth part can move in the ratchet tooth groove, the guide block part can move in the guide groove, and a hook tooth part is provided at the front end of the gear tooth; The front part of the gear tooth movable groove has a hook groove body, and the rear part of the gear tooth movable groove has a rear groove body and a prismatic surface. The hook tooth part at the front end of the gear tooth cooperates with the hook groove body, and the rear end of the gear tooth can move in the rear groove body, and the movable groove on the gear tooth cooperates with the prismatic surface, so that the gear tooth can swing around the prismatic surface. A spring is also installed in the gear tooth movable groove, and the spring is connected between the top of the gear tooth and the inner wall of the gear tooth movable groove.

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