A turntable locking mechanism for a handrail

Abstract

The application discloses a rotary disc locking mechanism of an armrest and relates to the technical field of automobile seat testing, which comprises a shaft sleeve, a locking disc, a first shifting piece, a second shifting piece, a first rotating shaft, a second rotating shaft, a torsional spring, a fixed base and an unlocking plate. The fixed base and the shaft sleeve are arranged on an armrest support assembly. The locking disc is arranged through the shaft sleeve and is connected with the fixed base. The locking disc is provided with a locking hole. One end of the first rotating shaft and the second rotating shaft is connected with the armrest support assembly. The first shifting piece is arranged on the first rotating shaft. The unlocking plate is connected with the second end of the first rotating shaft. The second shifting piece is arranged on the second rotating shaft. The second shifting piece is provided with a clamping tongue matched with the locking hole. The torsional spring is arranged on the first rotating shaft. The first shifting piece and the second shifting piece are in transmission cooperation. When the first shifting piece rotates, the second shifting piece is driven to rotate, so that the clamping tongue is pulled out of or clamped into the locking hole. The application realizes precise locking through twice rotation transmission, solves the problem of armrest shaking, and has low cost and flexible structure.

Description

Technical Field

[0001] This invention relates to the field of automotive seat technology, and more particularly to a turntable locking mechanism for an armrest. Background Technology

[0002] Currently, there are two main methods for locking the rear center armrest.

[0003] One type is the latch lock, where a latch located at the bottom of the handrail is locked and unlocked by pulling a lever along a cable. Since the handrail's opening and closing hinge is located at the bottom, the locking mechanism also needs to be located there, requiring a safety clearance for movement. This type has a significant technical flaw: because the locking point is at the bottom hinge, while the handrail's stress point is at the top, the lever arm is relatively long, resulting in significant swaying at the top when locked, severely impacting product quality and user experience.

[0004] The second method is the angle adjuster locking mechanism, where an angle adjuster is placed at the bottom pivot of the handrail to achieve locking. As a precision assembly component, the angle adjuster effectively solves the problem of excessive swaying. However, the angle adjuster is a complex and precise metal assembly, with its parts distributed among a few major suppliers, resulting in high costs. Furthermore, the number of angle adjuster models is limited, forcing handrail designers to choose from only a few options, making flexible adjustments based on the actual shape of the handrail impossible and imposing numerous limitations on handrail development.

[0005] There is currently no effective solution to the above problems. Summary of the Invention

[0006] To address the aforementioned problems in the prior art, this invention provides a novel turntable locking mechanism that achieves the locking function through two rotations of a metal component. This mechanism aims to effectively solve the problem of handrail swaying while reducing costs and improving the flexibility of structural design.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A turntable locking mechanism for a handrail includes: a bushing, a locking disc, a first paddle, a second paddle, a first rotating shaft, a second rotating shaft, a torsion spring, a fixed base, and an unlocking plate. The fixed base is fixedly mounted on a handrail support assembly. The bushing is mounted on a side plate of the handrail support assembly. The locking disc passes through the bushing and is connected at one end to the fixed base. The locking disc has a locking hole. The first ends of the first and second rotating shafts are rotatably connected to the side plate of the handrail support assembly. The first paddle is fixedly mounted on the first rotating shaft. The unlocking plate is connected to the second end of the first rotating shaft and is used to receive a brake cable drive to rotate the first rotating shaft. The second paddle is fixedly mounted on the second rotating shaft and has a latch adapted to the locking hole. The torsion spring is mounted on the first rotating shaft to provide a restoring force. The first and second paddles are in a transmission cooperation. When the first paddle rotates, it drives the second paddle to rotate, causing the latch to disengage from or engage with the locking hole.

[0008] As a preferred embodiment of the present invention, the first paddle includes a mounting hole for connecting to the first rotating shaft, a torsion spring fixing part for connecting one end of the torsion spring, and a first engaging part for engaging with the second paddle.

[0009] As a preferred embodiment of the present invention, the second paddle includes: a fixing hole for connecting with the second rotating shaft, a second locking portion for adapting to the first locking portion, a latching tongue adapted to the lock hole on the lock disc, and an unlocking tongue for cooperating with the first paddle to unlock.

[0010] As a preferred embodiment of the present invention, an arc-shaped portion is formed on the first locking portion, and the unlocking tongue slides in cooperation with the arc-shaped portion; when the first lever rotates in the first direction, the unlocking tongue drives the second lever to rotate in the second direction under the drive of the arc-shaped portion, so that the second locking portion separates from the first locking portion, and the locking tongue disengages from the lock hole to achieve unlocking; the first direction is opposite to the second direction.

[0011] As a preferred embodiment of the present invention, the side of the second latching portion near the locking disc is formed with an arc surface that matches the outer peripheral surface of the locking disc.

[0012] As a preferred embodiment of the present invention, a half-shaft structure is provided on the first rotating shaft, and the unlocking plate is driven by the first rotating shaft through the half-shaft structure.

[0013] As a preferred embodiment of the present invention, the torsion spring is disposed on the first rotating shaft between the side plate and the fixed base, with one end of the torsion spring connected to the first rotating shaft and the other end connected to the first lever.

[0014] As a preferred embodiment of the present invention, the lock disc is provided with a plurality of lock holes spaced apart along the circumferential direction.

[0015] As a preferred embodiment of the present invention, it further includes an unlocking handle, which is connected to the gate cable.

[0016] As a preferred embodiment of the present invention, the gate cable is fixed to the handrail bracket assembly by plugging and / or screwing.

[0017] By adopting the above-described technical solution, the beneficial effects of the present invention compared with the prior art are as follows: 1. The turntable locking mechanism of the handrail of the present invention significantly improves the swaying problem: Compared with the plug lock, the present invention achieves locking through two rotation transmissions of the metal structure. The locking point is separated from the handrail pivot, avoiding the amplification effect caused by the long lever arm, realizing precise locking at a small angle, effectively solving the swaying problem after the handrail is locked, and improving the product quality. 2. The turntable locking mechanism of the handrail of the present invention reduces manufacturing costs: Compared with the type of angle adjuster, all components of the present invention are metal parts, and each part can be manufactured independently. There is no need to purchase the expensive precision angle adjuster assembly from the supplier, which effectively reduces the cost of the handrail locking mechanism. 3. The turntable locking mechanism for handrails of the present invention has strong design flexibility: The present invention has a simple structure, and the size and arrangement of each component can be flexibly adjusted according to the shape of the handrail, avoiding the problem of limited selection of angle adjusters, so that the handrail design is no longer limited to a limited number of supplier product models. 4. The handrail turntable locking mechanism of the present invention has high transmission efficiency and good reliability: through the mechanical transmission between the paddles and the reset of the torsion spring, the unlocking and locking actions are reliable and have good long-term stability. Attached Figure Description

[0018] Other objects and results of the invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings. In the drawings: Figure 1 This is a perspective view of an example of the present invention; Figure 2 This is an exploded view of an example of the present invention; Figure 3 This is a schematic diagram of a partial structure of an example of the present invention; Figure 4 This is another schematic diagram of the structure of an example part of the present invention; Figure 5 This is a perspective view of an example application of the present invention; The reference numerals in the accompanying drawings include: 1. Handrail bracket assembly; 2. Bushing; 3. Locking disc; 4. Second lever; 5. Second pivot; 6. First lever; 7. First pivot; 8. Torsion spring; 9. Fixed base; 10. Unlocking plate; 11. Brake cable; 12. Handrail fixing bracket; 13. Unlocking handle; 31. Locking hole; 41. Fixing hole; 42. Second locking part; 421. Arc surface; 43. Locking tongue; 44. Unlocking tongue; 61. Mounting hole; 62. Torsion spring fixing part; 63. First locking part; 631. Arc-shaped part; 71. Half-shaft structure. Detailed Implementation

[0019] The technical solutions of various embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. It should be pointed out that all accompanying drawings are exemplary representations. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0023] Reference Figures 1 to 5 , Figure 1 This is a perspective view of an example of the present invention. Figure 2 This is an exploded view of an example of the present invention. Figure 3 This is a schematic diagram of a partial structure of an example of the present invention. Figure 4 This is another schematic diagram of the structure of an example part of the present invention. Figure 5This is a perspective view of an application of the present invention. The present invention provides a turntable locking mechanism for a handrail, comprising: a bushing 2, a locking disc 3, a first lever 6, a second lever 4, a first rotating shaft 7, a second rotating shaft 5, a torsion spring 8, a fixed base 9, and an unlocking plate 10. The fixed base 9 is fixedly mounted on the handrail support assembly 1, serving as an integral base. The bushing 2 is mounted on the side plate of the handrail support assembly 1. The locking disc 3 passes through the bushing 2, with one end connected to the fixed base 9 and the other end connected to the handrail fixed bracket 12. The locking disc 3 has a locking hole 31. The first ends of both the first rotating shaft 7 and the second rotating shaft 5 are rotatably connected to the side plate of the handrail support assembly 1. The first lever 6 is fixedly mounted on the first rotating shaft 7. The second end of the first rotating shaft 7 passes through the fixed base 9. The unlocking plate 10 is connected to the second end of the first rotating shaft 7 and is used to receive the drive of the brake cable 11. The first rotating shaft 7 rotates, and the second lever 4 is fixedly mounted on the second rotating shaft 5. The second end of the second rotating shaft 5 is connected to the fixed base 9. The second lever 4 is provided with a latch 43 that matches the lock hole 31. The torsion spring 8 is installed on the first rotating shaft 7 between the side plate of the armrest bracket assembly 1 and the fixed base 9 to provide a restoring force. More specifically, one end of the torsion spring 8 is connected to the first rotating shaft 7, and the other end is connected to the first lever 6. The first lever 6 and the second lever 4 are in a transmission cooperation. When the first lever 6 rotates, it drives the second lever 4 to rotate, causing the latch 43 to disengage from or engage with the lock hole 31. When the latch 43 engages with the lock hole 31, the armrest is locked and in a fixed state. When the latch 43 disengages from the lock hole 31, the armrest is unlocked and can rotate.

[0024] In one embodiment, the paddle structure and its mating relationship are as follows: The first paddle 6 includes a mounting hole 61, a torsion spring fixing part 62, and a first snap-fit ​​part 63. The mounting hole 61 is used to fix and connect with the first rotating shaft 7, the torsion spring fixing part 62 is used to connect one end of the torsion spring 8, and the first snap-fit ​​part 63 is snapped and engaged with the second paddle. An arc-shaped part 631 is formed on the first snap-fit ​​part 63.

[0025] The second lever includes a fixing hole 41, a second engaging portion 42, a latch 43, and an unlocking tongue 44. The fixing hole 41 is used for fixed connection with the second rotating shaft 5, the second engaging portion 42 is used for engaging with the first engaging portion 63 of the first lever 6, the latch 43 is adapted to the lock hole 31 on the lock disc 3 and is used to insert into the lock hole 31 to lock, and the unlocking tongue 44 slides with the arc-shaped portion 631 of the first lever 6 to unlock.

[0026] When the first lever 6 rotates in the first direction, the unlocking tongue 44, driven by the arc-shaped portion 631, drives the second lever 4 to rotate in the second direction, causing the second locking portion 42 to separate from the first locking portion 63, and the tongue 43 to disengage from the lock hole 31, thus unlocking the device; the first direction is opposite to the second direction. In a preferred embodiment, the side of the second locking portion 42 near the lock disc 3 has an arc surface 421 that matches the outer peripheral surface of the lock disc 3.

[0027] In one embodiment, a half-shaft structure 71 is provided on the first rotating shaft 7, and the unlocking plate 10 is driven by the first rotating shaft 7 through the half-shaft structure 71.

[0028] In one embodiment, an unlocking handle 13 is also included, which is connected to the gate cable 11. The gate cable 11 is preferably fixed to the handrail bracket assembly 1 by a plug and / or screws.

[0029] In one embodiment, the lock disc 3 is provided with a plurality of lock holes 31 spaced apart along its circumference. The number and distribution angle of the lock holes 31 on the lock disc 3 can be adjusted according to the required number of locking positions.

[0030] The following will refer to Figures 1 to 5 The working principle of the present invention will be explained.

[0031] (1) Locked state In its natural state, the latch 43 of the second lever 4 engages with the lock hole 31 of the lock disc 3. Since the lock disc 3 is fixedly connected to the armrest fixing bracket 12, the armrest fixing bracket 12 is fixed to the seat or vehicle body, and the armrest bracket assembly 1 is fixed as a whole by the locking mechanism with the lock disc 3, the entire armrest bracket assembly 1 is fixed and locked, the armrest cannot be flipped, and remains stationary.

[0032] At this time, the first lever 6 and the second lever 4 are in a locked engagement state, that is, the first locking part 63 and the second locking part 42 are locked together. The side of the second locking part 42 near the locking disc 3 has an arc surface 421 that matches the outer peripheral surface of the locking disc 3, ensuring that the components fit tightly together without any wobble or gaps when locked.

[0033] (2) Unlocking process The user operates the unlocking handle 13, which pulls the unlocking plate 10 to rotate via the gate cable 11. The unlocking plate 10 drives the first rotating shaft 7 to rotate via the half-shaft structure on the first rotating shaft 7.

[0034] The first rotating shaft 7 rotates in a first direction (e.g., counterclockwise), causing the first paddle 6 fixed thereon to rotate counterclockwise in sync. When the first paddle 6 rotates, its arc-shaped portion 631 pushes the unlocking tongue 44 of the second paddle 4, causing the second paddle 4 to rotate in a second direction (e.g., clockwise).

[0035] During the rotation of the second lever 4, the second locking part 42 separates from the first locking part 63 of the first lever 6, and at the same time, the latch 43 disengages from the lock hole 31 of the lock disc 3, thus unlocking the armrest. At this time, the armrest can be freely rotated.

[0036] (3) Reset process After the user releases the unlocking handle 13, the tension on the brake cable 11 is released. Under the restoring force of the torsion spring 8, the first rotating shaft 7 drives the first lever 6 to rotate and reset in the opposite direction to the unlocking direction. During the reset process of the first lever 6, the first locking part 63 pushes the second locking part 42 of the second lever 4, causing the second lever 4 to reset. The latch 43 then re-engages into the corresponding lock hole 31 of the lock disc 3, restoring the locking state.

[0037] Dual-sided synchronous unlocking embodiment: When the handrail is large or the locking strength requirement is high, a second locking assembly needs to be installed on the other side of the handrail. A locking assembly with the same structure as described above is symmetrically arranged on the other side, and a single gate cable connects the unlocking plate to the unlocking end of the second locking assembly. When the gate cable is pulled, it causes the unlocking plates on both sides to move synchronously, ensuring that the locking assemblies on both sides unlock or lock simultaneously.

[0038] In addition, those skilled in the art can make the following modifications based on the above embodiments: The number and distribution angle of the locking holes 31 on the locking disc 3 can be adjusted according to the required number of locking positions; the rotational connection between the first rotating shaft 7 and the side plate of the handrail bracket assembly 1 can be achieved by bearings or bushings; the installation position and method of the torsion spring 8 can be adjusted according to the specific spatial arrangement, as long as the first lever 6 can be reset.

[0039] This invention provides a turntable locking mechanism for handrails, significantly improving the wobbling problem: Compared to a latch lock, this invention achieves locking through a two-stage rotational transmission of a metal structure. The locking point is separated from the handrail's pivot shaft, avoiding the amplification effect caused by a long lever arm, achieving precise locking at small angles, effectively solving the wobbling problem after the handrail is locked, and improving product quality. This invention also reduces manufacturing costs: Compared to an angle adjuster, all components of this invention are metal parts, and each part can be manufactured independently, eliminating the need to purchase expensive precision angle adjuster assemblies from suppliers, effectively reducing the cost of the handrail locking mechanism. Furthermore, this invention offers high design flexibility: The invention has a simple structure, and the size and arrangement of each component can be flexibly adjusted according to the handrail shape, avoiding the limitation of angle adjuster selection, and freeing handrail design from the constraints of limited supplier product models. Finally, this invention provides high transmission efficiency and good reliability: Through the mechanical transmission between the levers, combined with torsion spring reset, the unlocking and locking actions are reliable, and the long-term stability is good.

[0040] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A turntable locking mechanism for an armrest, characterized in that, include: The assembly includes a bushing, a locking disc, a first paddle, a second paddle, a first rotating shaft, a second rotating shaft, a torsion spring, a fixed base, and an unlocking plate. The fixed base is fixedly mounted on the handrail support assembly. The bushing is mounted on the side plate of the handrail support assembly. The locking disc passes through the bushing and is connected at one end to the fixed base. The locking disc has a locking hole. The first ends of the first and second rotating shafts are rotatably connected to the side plate of the handrail support assembly. The first paddle is fixedly mounted on the first rotating shaft. The unlocking plate is connected to the second end of the first rotating shaft and is used to receive a brake cable drive to rotate the first rotating shaft. The second paddle is fixedly mounted on the second rotating shaft and has a latch adapted to the locking hole. The torsion spring is mounted on the first rotating shaft to provide a restoring force. The first and second paddles are in a transmission cooperation. When the first paddle rotates, it drives the second paddle to rotate, causing the latch to disengage from or engage with the locking hole.

2. The turntable locking mechanism for a handrail according to claim 1, characterized in that, The first paddle includes a mounting hole for connecting to the first rotating shaft, a torsion spring fixing part for connecting one end of the torsion spring, and a first engaging part for engaging with the second paddle.

3. The turntable locking mechanism for a handrail according to claim 2, characterized in that, The second paddle includes: a fixing hole for connecting to the second rotating shaft, a second locking part for adapting to the first locking part, a locking tongue adapted to the lock hole on the lock disc, and an unlocking tongue for cooperating with the first paddle to unlock.

4. The turntable locking mechanism for a handrail according to claim 3, characterized in that, An arc-shaped portion is formed on the first latching portion, and the unlocking tongue slides in cooperation with the arc-shaped portion; when the first lever rotates in the first direction, the unlocking tongue drives the second lever to rotate in the second direction under the drive of the arc-shaped portion, so that the second latching portion separates from the first latching portion, and the latching tongue disengages from the lock hole to achieve unlocking; the first direction is opposite to the second direction.

5. The turntable locking mechanism for a handrail according to claim 3, characterized in that, The second latching portion has an arc surface on the side near the locking disc that matches the outer peripheral surface of the locking disc.

6. The turntable locking mechanism for a handrail according to claim 1, characterized in that, The first rotating shaft has a half-shaft structure, and the unlocking plate is driven by the first rotating shaft through the half-shaft structure.

7. The turntable locking mechanism for a handrail according to claim 1, characterized in that, The torsion spring is disposed on the first rotating shaft between the side plate and the fixed base. One end of the torsion spring is connected to the first rotating shaft, and the other end is connected to the first lever.

8. The turntable locking mechanism for a handrail according to claim 1, characterized in that, The lock disc has a plurality of lock holes spaced at intervals along its circumference.

9. The turntable locking mechanism for a handrail according to claim 1, characterized in that, It also includes an unlocking handle, which is connected to the gate line.

10. The turntable locking mechanism for a handrail according to claim 1, characterized in that, The gate cable is fixed to the handrail bracket assembly by plugging and / or screws.

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