Handrail tilting device

Abstract

The present invention relates to a handrail tilting device capable of tilting adjustment of a handrail provided to support a user's arm in a seat, comprising: a shaft provided to the seat and rotatably provided at one end to the handrail; a housing fastened to the handrail to support the shaft in a state provided to the handrail; a bracket fastened and fixed to the shaft; a ratchet rotatably fastened to a hinge member fastened to the bracket; a sector gear portion fastened to the handrail and rotating together to engage the ratchet; a guide plate provided to the sector gear portion to move in an area in a state where the ratchet is separated from the sector gear portion; and an elastic member to apply an elastic force in a manner that ratchet gear teeth formed in the ratchet engage with sector gear teeth formed in the sector gear portion. With this structure, a structural simplification can be achieved, thereby reducing the number of components and achieving a lightweight effect.

Description

Technical Field

[0001] The present invention relates to an armrest tilting device, and more specifically, to an armrest tilting device capable of tilting an armrest provided in a seat to support the user's arm. Background Technology

[0002] Generally, seats in cars or trains are equipped with armrests that allow passengers to place their arms on top so that they can adopt a comfortable posture.

[0003] The aforementioned handrails serve the following functions: to eliminate passenger fatigue caused by long journeys, or to prevent passengers from suddenly tilting to one side during rapid departure, sudden rotation, or emergency braking of the vehicle.

[0004] These armrests are designed so that passengers can place their arms on either side or one side of the seat back. Furthermore, the armrests are positioned to protrude outwards from the sides of the seat back, providing comfortable support for the passenger's arms.

[0005] Furthermore, the armrest allows the arm to be placed on it while it is level with the floor of the room, and when the armrest is not in use, it can rotate around an axis on one side, thereby rotating in a position parallel to the back of the seat.

[0006] Furthermore, the armrests are designed to allow for adjustment of the support arm angle according to the passenger's convenience. This results in a complex structure with multiple gears and springs, which can lead to issues with increased weight or size.

[0007] Existing technical documents

[0008] Patent documents

[0009] (Patent Document 1) Korean Patent No. 10-1921910 (October 4, 2019) Summary of the Invention

[0010] Technical issues

[0011] The present invention was proposed to solve the problems mentioned above, and its purpose is to provide a handrail tilting device that can reduce the number of parts through structural simplification, thereby achieving a lightweight design.

[0012] Technical solution

[0013] To achieve the objectives described above, the armrest tilting device according to a preferred embodiment of the present invention comprises: a shaft disposed on a seat, one end of which is rotatably disposed on the armrest; a housing fastened to the armrest, the other end of which passes through to support the shaft when disposed on the armrest; a bracket fastened to the shaft; a ratchet rotatably fastened to a hinge member, which is fastened to the bracket; a sector gear portion fastened to the armrest and rotating together, engaging with the ratchet; a guide plate that moves over a region when the ratchet portion is disengaged from the sector gear portion; and an elastic member that applies an elastic force between the bracket and the ratchet in such a manner that the ratchet gear teeth formed on the ratchet engage with the sector gear teeth formed on the sector gear portion.

[0014] According to this structure, the handrail tilting device is configured such that when the handrail rotates in one direction and the ratchet disengages from the sector gear, when the handrail rotates in another direction, the guide plate tilts the ratchet in the axial direction and moves it in a region. When the ratchet disengages from the guide plate, the ratchet returns due to the elastic force of the elastic member and re-engages with the sector gear.

[0015] The guide plate can be configured to include: a guide plate body, fastened to the sector gear portion; a guide tilting portion, formed at the end of the guide plate body at a downward inclination, wherein the ratchet, which separates from the sector gear portion, is inclined in the axial direction and in close contact; a guide portion, formed on the side of the guide plate body protruding toward the teeth of the sector gear, for guiding the relative movement of the ratchet; and a ratchet insertion portion, formed to expose the side of the sector gear portion, so that the ratchet, which moves relative to the guide portion, is inserted and engages with the sector gear portion.

[0016] Furthermore, the aforementioned elastic member can be configured such that, when inserted into the aforementioned hinge member, one end is fastened to the aforementioned bracket and the other end is fastened to the aforementioned ratchet, applying a rotational elastic force to make the ratchet gear teeth mesh with the aforementioned sector gear teeth, and applying an axial elastic force to make the ratchet, which has separated from the aforementioned sector gear portion, engage with the aforementioned sector gear portion.

[0017] The aforementioned sector gear portion may be configured to include: a sector gear portion body, fastened to the aforementioned handrail; sector gear teeth, formed along the side of the aforementioned sector gear portion body in such a manner as to engage with the aforementioned ratchet gear teeth; and a disengagement inclined portion, formed at a downward inclination from the side end of the aforementioned sector gear portion body to separate from the aforementioned ratchet gear teeth.

[0018] Furthermore, the ratchet can be configured to include: a ratchet body rotatably fastened to the hinge component; ratchet gear teeth formed at the end of the ratchet body and meshing with the sector gear teeth; and a ratchet inclined portion formed to be inclined downwards towards the end where the ratchet gear teeth are formed, and guided by the guide plate when separated from the sector gear portion.

[0019] The aforementioned shaft may be configured to include: a shaft body disposed in the seat through a shaft through hole formed in the outer casing; a flange portion that expands radially from the shaft body with a diameter larger than that of the shaft through hole, so as to be in close contact with the outer casing; a bracket fastening portion that protrudes from the flange portion in the axial direction, is clamped into and fastened to the shaft fastening hole of the bracket; and a rotating shaft that protrudes from the fastening portion in the axial direction, is inserted into a rotating hole formed in the armrest and is rotatably supported.

[0020] Invention Effects

[0021] According to the handrail tilting device based on the present invention, the following effects can be achieved: the number of parts can be reduced through structural simplification, thereby achieving weight reduction. Attached Figure Description

[0022] Figure 1 This is a schematic perspective view illustrating a handrail tilting device based on an embodiment of the present invention.

[0023] Figure 2 This is an exploded perspective view schematically illustrating a handrail tilting device based on an embodiment of the present invention.

[0024] Figure 3 This is a schematic top view illustrating a handrail tilting device based on an embodiment of the present invention.

[0025] Figure 4 Cutting in the handrail tilting device based on an embodiment of the present invention Figure 3 The AA area is used to schematically illustrate the cross-sectional view.

[0026] Figure 5 Cutting in the handrail tilting device based on an embodiment of the present invention Figure 3 The BB region is used to schematically illustrate the cross-sectional view.

[0027] Figure 6 This is a perspective view schematically showing the main parts extracted from the handrail tilting device based on an embodiment of the present invention.

[0028] Figure 7 This diagram schematically illustrates the tilted state of the handrail in a handrail tilting device based on an embodiment of the present invention.

[0029] Figure 8 This diagram schematically illustrates the state in which the ratchet is disengaged from the sector gear portion in a handrail tilting device based on an embodiment of the present invention.

[0030] Figure 9 This diagram schematically illustrates the state in which the ratchet re-engages with the sector gear after moving along the guide plate in the handrail tilting device according to an embodiment of the present invention.

[0031] Figure 10 Cutting in the handrail tilting device based on an embodiment of the present invention Figure 9 The cross-sectional view is schematically shown using the CC region.

[0032] Explanation of reference numerals in the attached figures

[0033] 10: Handrail 100: Handrail tilting device

[0034] 200: Shaft 210: Shaft body

[0035] 220: Flange portion; 230: Bracket fastening portion

[0036] 240: Rotating shaft; 300: Housing

[0037] 310: Through hole for shaft; 320: Fastening hole for fastening protrusion.

[0038] 400: Support bracket 410: Support bracket body

[0039] 420: Bracket cover; 430: Hinge component

[0040] 500: Ratchet 510: Ratchet body

[0041] 520: Ratchet gear teeth; 530: Ratchet inclined section

[0042] 600: Sector gear section; 610: Main body of sector gear section.

[0043] 620: Sector gear teeth; 630: Disengagement from inclined section

[0044] 700: Guide plate; 710: Guide plate body

[0045] 720: Guide tilting part; 730: Guide part

[0046] 740: Ratchet insertion part; 800: Elastic component Detailed Implementation

[0047] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0048] This invention is capable of various modifications and can have various embodiments, with specific embodiments illustrated in the accompanying drawings and described in detail below. This is not intended to limit the invention to specific implementations, but should be interpreted to include all modifications, equivalents, and substitutions encompassed within the spirit and technical scope of this invention.

[0049] The terminology used in this application is for illustrative purposes only and is not intended to limit the invention. A single expression may encompass multiple expressions unless the context clearly indicates otherwise.

[0050] Unless otherwise defined, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by those skilled in the art. Terms identical to those defined in commonly used dictionaries may be interpreted as having a meaning consistent with the context of the related art, and may not be interpreted as having an ideal or overly formal meaning unless explicitly defined in this application.

[0051] Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.

[0052] Figure 1 and Figure 2 These are schematic perspective views and exploded perspective views of a handrail tilting device based on an embodiment of the present invention. Figure 3 This is a schematic top view of the aforementioned handrail tilting device. Figure 4 and Figure 5 It is to cut off separately Figure 3 The cross-sectional view is schematically shown using regions AA and BB. Figure 6 This is a perspective view schematically showing the main components extracted from the aforementioned handrail tilting device. Figures 7 to 9 This diagram schematically illustrates the operating state of the aforementioned handrail tilting device. Figure 10 It is to cut off Figure 9 The cross-sectional view is schematically shown using the CC region.

[0053] Reference Figures 1 to 10 According to an embodiment of the present invention, the armrest tilting device 100 is configured to include: a shaft 200 disposed on a seat (not shown); a housing 300 rotatably disposed on the armrest 10 with the shaft 200 thereon; a bracket 400 fastened to the shaft 200; a ratchet 500 rotatably fastened to the bracket 400; a sector gear portion 600 fastened to the armrest 10 and engaging with the ratchet 500; a guide plate 700 guiding the ratchet 500, which is separated from the sector gear portion 600, to move in a separated state; and an elastic member 800 applying an elastic force to engage the ratchet 500 with the sector gear portion 600.

[0054] In particular, the handrail tilting device 100 of the present invention is configured such that, after the handrail 10 rotates in one direction and the ratchet 500 separates from the sector gear portion 600, when the handrail 10 rotates in another direction, the ratchet 500 tilts in the axial direction via the guide plate 700. Thus, when the ratchet 500 is in close contact with the guide plate 700, i.e., when the ratchet 500 is separated from the sector gear portion 600, the guide plate 700 moves in a region. When the ratchet 500 disengages from the guide plate 700, the ratchet 500 returns due to the elastic force of the elastic member 800 and re-engages with the sector gear portion 600.

[0055] That is, when the armrest 10 rotates from its basic position where it can support the arm to an upward direction within a certain angle range, the ratchet 500 and the sector gear 600 are engaged, so that the armrest 10 can be used at an angle desired by the user.

[0056] In this state, if it is necessary to change the tilt angle of the handrail 10 again, after rotating the handrail 10 upward until it is almost upright, it is rotated downward again in the other direction, so that the handrail 10 tilts from the initial position again and the angle can be adjusted.

[0057] At this time, when the handrail 10 is rotated upward, the ratchet 500 separates from the sector gear 600. When the handrail 10 is rotated downward, the guide plate 700 tilts the ratchet 500 in the axial direction, so that the guide plate 700 moves in the state where the ratchet 500 is separated from the sector gear 600. When the handrail 10 reaches the initial position, the ratchet 500 disengages from the guide plate 700 by the elastic force of the elastic member 800 and engages with the sector gear 600 again.

[0058] That is, the elastic member 800 is configured such that when the ratchet 500 is located in the region of the sector gear 600, an elastic force is applied in the rotational direction to make the ratchet 500 engage with the sector gear 600; when the ratchet 500 is located on the guide plate 700, an elastic force is applied in the axial direction; and when the ratchet 500 disengages from the guide plate 700, an elastic force is applied in the axial direction to make the ratchet 500 return and engage with the sector gear 600 again.

[0059] In order to perform this action, the armrest 10 is rotatably mounted on the seat via the shaft 200.

[0060] Furthermore, one end of the aforementioned shaft 200 is rotatably disposed on the aforementioned handrail 10, and the aforementioned shaft 200 is rotatably fixed to the aforementioned handrail 10 via the aforementioned housing 300.

[0061] More specifically, the aforementioned shaft 200 is configured to include: a shaft body 210, which is disposed in the seat through a shaft through hole 310 formed in the aforementioned housing 300; a flange portion 220, which is formed by expanding radially from the aforementioned shaft body 210 with a diameter larger than that of the aforementioned shaft through hole 310, so as to be in close contact with the aforementioned housing 300; a bracket fastening portion 230, which is formed by protruding from the aforementioned flange portion 220 in the axial direction, and is clamped and fastened in the shaft fastening holes 411, 421 formed in the aforementioned bracket 400; and a rotating shaft 240, which is formed by protruding from the aforementioned bracket fastening portion 230 in the axial direction, and is inserted into the rotating hole 11 formed in the aforementioned armrest 10 and is rotatably supported.

[0062] That is, regarding the aforementioned shaft 200, the aforementioned rotating shaft 240 is rotatably inserted into the rotating hole 11 of the aforementioned handrail 10. As the aforementioned housing 300 is fastened to the aforementioned handrail 10, the aforementioned shaft body 210 passes through the shaft through hole 310 of the aforementioned housing 300 and protrudes to the outside of the aforementioned housing 300. The aforementioned flange portion 220 is in close contact with the inner side of the aforementioned housing 300. The aforementioned handrail 10 is rotatably disposed on the aforementioned shaft 200.

[0063] The bracket 400 is inserted into and fastened to the bracket fastening part 230 of the shaft 200 and thus fixed to the shaft 200.

[0064] As an example, the aforementioned bracket 400 can be composed of a bracket body 410 and a bracket cover 420 that is combined with the bracket body 410.

[0065] The aforementioned bracket body 410 is disposed on the inner circumferential surface of the aforementioned handrail 10, and forms: a shaft fastening hole 411, into which a bracket fastening part 230 for fastening the aforementioned shaft 200 is inserted; and a hinge component fastening hole 412, through which a hinge component 430 for rotatably fastened by the aforementioned ratchet 500 is inserted.

[0066] Furthermore, a ratchet insertion groove 413 is formed in the bracket body 410 to accommodate the ratchet 500, and a ratchet stop member 414 is formed adjacent to the ratchet insertion groove 413. The ratchet stop member 414 is in close contact with the ratchet 500 to restrict its rotation.

[0067] The ratchet 500 is configured to rotate in one direction by the rotational elastic force of the elastic member 800, and the ratchet 500 is restricted by the ratchet stop member 414 to prevent rotation beyond a certain range. That is, when the ratchet 500 is in close contact with the ratchet stop member 414 by the elastic force of the elastic member 800, the ratchet gear teeth 520 mesh with the sector gear teeth 620.

[0068] The bracket cover 420 is configured to be in close contact with the flange portion 220 of the shaft 200, and is fastened to the bracket body 410 when the ratchet 500 is inserted into the hinge member 430, thereby preventing the ratchet 500 from disengaging in the axial direction. This bracket cover 420 includes: a shaft fastening hole 421 for inserting and fastening the bracket fastening portion 230 of the shaft 200; and a hinge member fastening hole 422 for through-inserting the hinge member 430.

[0069] Here, the aforementioned shaft fastening holes 411 and 421 are formed with protrusions and recesses around the periphery, and the outer peripheral surface of the bracket fastening part 230 of the aforementioned shaft 200 is also formed with protrusions and recesses of corresponding shapes, so that it is fastened and fixed in a way that does not rotate relative to the aforementioned shaft 200.

[0070] The ratchet 500 is inserted into the hinge component 430 fastened to the bracket 400, thereby being fastened in a rotatable manner. The ratchet gear teeth 520 mesh with the sector gear teeth 620 through the elastic force of the elastic component 800.

[0071] More specifically, the ratchet 500 is configured to include: a ratchet body 510 having a hinge component insertion hole 511 for inserting the hinge component 430, and being rotatably secured by inserting the hinge component 430; ratchet gear teeth 520 formed at the end of the ratchet body 510 and meshing with the sector gear teeth 620; and a ratchet inclined portion 530 formed to be inclined downward towards the end where the ratchet gear teeth 520 are formed, and being guided by the guide plate 700 in a state of separation from the sector gear portion 600.

[0072] With this structure, when the ratchet 500 and the sector gear 600 are arranged opposite each other, the ratchet gear teeth 520 engage with the sector gear teeth 620 through the elastic force of the elastic member 800. Furthermore, after the handrail 10 rotates upwards and the ratchet 500 disengages from the sector gear 600, when the handrail 10 rotates downwards, the ratchet inclined portion 530 tilts along the guide inclined portion 720 of the guide plate 700 and is supported by the guide plate 700, thus disengaging the ratchet 500 from the sector gear 600. And when the handrail 10 returns to its initial position, the ratchet 500 disengages from the guide plate 700 through the elastic force of the elastic member 800, and the ratchet gear teeth 520 re-engage with the sector gear teeth 620.

[0073] The aforementioned sector gear 600 is configured to be fastened to the aforementioned handrail 10 and rotate together with the aforementioned handrail 10, and to engage with the aforementioned ratchet 500.

[0074] More specifically, the aforementioned sector gear portion 600 is configured to include: a sector gear portion body 610, which is fastened to the aforementioned handrail 10; sector gear teeth 620, which are formed along the side of the aforementioned sector gear portion body 610 in such a way that the aforementioned ratchet gear teeth 520 mesh; and a disengagement inclined portion 630, which is formed at a downward inclination at the side end of the aforementioned sector gear portion body 610 to separate from the aforementioned ratchet gear teeth 520.

[0075] The aforementioned sector gear main body 610 has multiple fastening protrusions 611 protruding outwards on both sides. These fastening protrusions protruding towards the armrest 10 are inserted into fastening grooves 12 formed on the inner circumferential surface of the armrest 10 for fastening. Furthermore, the multiple fastening protrusions 611 protruding from the sector gear main body 610 towards the outer casing 300 are inserted into fastening holes 320 formed in the outer casing 300, thereby fastening them to the outer casing 300.

[0076] Furthermore, referring to Figure 7 The aforementioned sector gear teeth 620 are formed in a region longer than the aforementioned ratchet gear teeth 520, and the aforementioned ratchet gear teeth 520 are able to adjust the tilt angle of the aforementioned handrail 10 in the region where they mesh with the aforementioned sector gear teeth 620.

[0077] The guide plate 700 is configured to move in a region when the ratchet 500 is separated from the sector gear section 600.

[0078] That is, the guide plate 700 is configured such that, during the process of the handrail 10 returning to the initial position, after maintaining the state in which the ratchet 500 does not engage with the sector gear 600 and is disengaged, when the handrail 10 returns to the initial position, it guides the handrail 10 by having the ratchet 500 engage with the sector gear 600 again.

[0079] More specifically, the guide plate 700 is configured to include: a guide plate body 710 having a plurality of through holes 711 for fastening protrusions to be inserted and fastened to the fastening protrusions 611 formed in the sector gear portion 600; a guide tilting portion 720 formed at the end of the guide plate body 710 at a downward angle, wherein the ratchet 500 separated from the sector gear portion 600 is tilted in the axial direction and in close contact; a guide portion 730 formed on the side of the guide plate body 710 protruding toward the side of the sector gear teeth 620 to guide the relative movement of the ratchet 500; and a ratchet insertion portion 740 formed to expose the side of the sector gear portion 600 so that the ratchet 500 moving relative to the guide portion 730 is inserted and engages with the sector gear portion 600.

[0080] With this structure, the aforementioned handrail 10 rotates upwards, thus... Figure 8 As shown, after the ratchet 500 disengages from the sector gear section 600, as Figure 9 As shown, when the handrail 10 rotates downward, the ratchet inclined portion 530 contacts the guide inclined portion 720, thereby the ratchet 500 moves relative to the guide portion 730 along the guide inclined portion 720. When the handrail 10 continues to rotate downward, after the ratchet 500 moves relative to the guide portion 730, it is inserted into the ratchet insertion portion 740 by the elastic force of the elastic member 800 at the position of the ratchet insertion portion 740, thereby the ratchet gear teeth 520 mesh with the sector gear teeth 620 again.

[0081] When the elastic member 800 is inserted into the hinge member 430, one end 810 is fastened to the bracket 400, and the other end 820 is fastened to the ratchet 500. With this structure, the elastic member 800 applies a rotational elastic force to the ratchet 500, causing the ratchet gear teeth 520 to mesh with the sector gear teeth 620. Simultaneously, an axial elastic force is applied to the ratchet 500, which is tilted and supported by the guide plate 700 after separating from the sector gear portion 600. Thus, when the ratchet 500 is located in the ratchet insertion portion 740 formed on the guide plate 700, an elastic force is applied so that the ratchet gear teeth 520 mesh with the sector gear portion 600 again.

[0082] Although the present invention has been described in detail above through specific embodiments, this is only for the purpose of illustrating the present invention. The present invention is not limited thereto. It should be understood that those skilled in the art can modify or improve the present invention within the technical concept of the present invention.

[0083] Simple variations and modifications of this invention fall within its scope, and the specific protection scope of this invention becomes clearer through the claims.

Claims

1. A handrail tilting device, comprising: A shaft is installed on the seat, and one end is rotatably mounted on the armrest; The outer casing is fastened to the handrail, and the other end of the shaft is through, supporting the shaft when it is installed on the handrail; The bracket is fastened and fixed to the shaft; A ratchet is rotatably fastened to a hinge component, which is fastened to the bracket; A sector gear section is fastened to the handrail and rotates together with it, engaging with the ratchet; A guide plate is provided that moves over a region when the ratchet is disengaged from the sector gear portion; as well as An elastic member is provided between the bracket and the ratchet, such that ratchet gear teeth formed on the ratchet mesh with sector gear teeth formed on the sector gear portion; The guide plate includes: The guide plate body is fastened to the sector gear section; A guide tilting part is formed at the end of the guide plate body at a downward tilt, and the ratchet, which is separated from the sector gear part, tilts in the axial direction and is in close contact; A guide portion is formed protruding from the side of the guide plate body toward the sector gear teeth, guiding the relative movement of the ratchet; and The ratchet insertion portion is configured to expose the side of the sector gear portion, so that the ratchet, which moves relative to the guide portion, is inserted and engages with the sector gear portion; The support includes: A support body is disposed on the inner circumferential surface of the handrail, and includes a shaft fastening hole for inserting and fastening the support fastening part of the shaft, and a hinge component fastening hole for inserting the hinge component through which the ratchet is rotatably fastened; and The bracket cover is configured to make close contact with the flange portion of the shaft and to be fastened to the bracket body while the ratchet is inserted into the hinge component, so as to prevent the ratchet from disengaging axially; Among them, the elastic component, With the hinge component inserted, one end is secured to the bracket and the other end is secured to the ratchet. An elastic force in the direction of rotation is applied to cause the ratchet gear teeth to mesh with the sector gear teeth. An axial elastic force is applied to cause the ratchet, which has separated from the sector gear portion, to engage with the sector gear portion; When the handrail rotates in one direction and the ratchet disengages from the sector gear, the handrail rotates in the other direction. The guide plate causes the ratchet to tilt in the axial direction and move within a certain area. When the ratchet disengages from the guide plate, it returns due to the elastic force of the elastic member and re-engages with the sector gear.

2. The handrail tilting device according to claim 1, characterized in that, The sector gear section includes: The main body of the sector gear section is fastened to the handrail; The sector gear teeth are formed along the side of the sector gear body in such a way that the ratchet gear teeth mesh; and It is detached from the inclined portion and is formed at a downward angle from the side end of the main body of the sector gear portion, so as to separate from the ratchet gear teeth.

3. The handrail tilting device according to claim 1, characterized in that, The ratchet includes: The ratchet body is rotatably fastened to the hinge component; Ratchet gear teeth are formed at the end of the ratchet body and mesh with the sector gear teeth; and The ratchet tilt portion is formed to tilt downwards towards the end where the ratchet gear teeth are formed, and is guided by the guide plate when separated from the sector gear portion.

4. The handrail tilting device according to claim 1, characterized in that, The shaft includes: A shaft body is disposed on the seat through a shaft through hole, which is formed in the outer shell; The flange portion is formed by expanding radially from the shaft body with a diameter larger than that of the shaft through hole, so as to make close contact with the housing; A bracket fastening portion protrudes axially from the flange portion and is clamped and fastened to the axial fastening hole of the bracket; and A rotating shaft, protruding from the fastening part in the axial direction, is inserted into a rotating hole formed in the handrail and is rotatably supported.

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