Centrifugal locking mechanism and seat armrest

Abstract

The centrifugal locking mechanism comprises an inner shell and an armrest rotating shaft, the armrest rotating shaft is arranged on one side of the inner shell, a rotating block is arranged on the other side of the inner shell, and the outer end of the armrest rotating shaft can penetrate through the inner shell to be connected with the rotating block. An annular inner toothed plate is connected to the side, away from the armrest rotating shaft, of the inner shell, locking oblique teeth are distributed on the inner side wall of the inner toothed plate, an eccentric centrifugal locking block is hinged to the rotating block, the centrifugal locking block extends into the inner toothed plate, rotation stopping oblique teeth are arranged at the bottom of the centrifugal locking block and correspond to the locking oblique teeth, and the rotation stopping oblique teeth correspond to the locking oblique teeth. And the locking helical teeth can be correspondingly wedged with the rotation stopping helical teeth, and the mechanism is arranged on the inner side of the seat framework and is connected with a handrail. The collision locking device has the beneficial effects that the complete collision locking function can be achieved, the safety risk is reduced, and the locking function is high in response speed, is not affected by the installation inclination angle of the backrest, is irrelevant to the collision acceleration direction and is only relevant to collision energy.

Description

Technical Field

[0001] The invention relates to the technical field of seat armrests, and in particular to a centrifugal locking mechanism and a seat armrest. Background Art

[0002] The movable armrests of car seats are an indispensable part of modern cars. They not only provide passengers with additional support and comfort, but also increase the convenience and practicality during the ride. Through adjustable design and combination with other functions, the movable armrests create a more personalized driving experience for passengers. Whether it is a long-distance trip or daily commuting, the movable armrests of car seats can bring passengers a more pleasant and comfortable driving experience.

[0003] However, the single-arm armrests or small and medium-sized armrests of existing car seat products do not have a locking function when not in use, which poses a serious safety hazard. During the driving process of the vehicle, if an emergency such as a collision or sudden braking occurs, the armrest without a locking function may accidentally fly out due to inertia. This situation will not only scare the passengers in the car, but is more likely to collide with the passenger's body when the armrest flies out, causing injuries to the passenger. The armrest usually contains some parts inside, such as cup holders, buttons, etc. If these parts are scattered when the armrest flies out, they may become flying objects in the car, further increasing the risk of injury to passengers. In particular, if these parts hit the key parts of the passenger, such as the head and neck, the consequences will be disastrous, which will not only reduce the passenger's riding experience, but also affect the overall safety of the vehicle. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a centrifugal locking mechanism and a seat armrest with high safety performance.

[0005] The technical solution is as follows: a centrifugal locking mechanism, the main points of which are: it includes an inner shell body and an armrest shaft, the armrest shaft is arranged on one side of the inner shell body, and an inner tooth plate with an annular structure is connected to the other side of the inner shell body, a rotating block is installed between the inner tooth plate and the inner shell body, the outer end of the armrest shaft can pass through the inner shell body and be connected to the rotating block, the inner side wall of the inner tooth plate is provided with locking bevel teeth, and a centrifugal locking block is eccentrically hinged on the rotating block, the centrifugal locking block is located in the inner tooth plate, one end of the centrifugal locking block is hinged to the rotating block, and the other end is provided with a stop bevel tooth corresponding to the locking bevel tooth, and the locking bevel tooth can overlap with the stop bevel tooth to achieve locking of the armrest shaft. With the above structure, after the handrail is collided, the handrail shaft can drive the rotating block to rotate at high speed, and the centrifugal locking block hinged on the rotating block rotates under the action of centrifugal force, and its rotation direction is opposite to that of the rotating block, thereby wedging with the locking bevel teeth of the inner tooth plate, realizing the anti-rotation function of the handrail and improving the safety of the handrail.

[0006] Preferably, a centrifugal shaft is provided on the rotating block, one end of the centrifugal locking block is hinged on the centrifugal shaft, a reset torsion spring is sleeved on the centrifugal shaft, one end of the reset torsion spring is fixed on the rotating block, and the other end is against the centrifugal locking block. With the above structure, when a passenger makes an error operation, the handrail rotates backward, and the centrifugal locking block can realize a normal reset function under the action of the reset torsion spring.

[0007] As a preference, a limit pin is eccentrically provided on the rotating block, and the outer side wall of the limit pin is pressed against the outer side wall of the centrifugal locking block. With the above structure, the position of the centrifugal locking block can be limited to avoid excessive rotation.

[0008] Preferably, a plastic pressing block is provided between the inner housing and the rotating block, and the plastic pressing block is located in the inner housing. With the above structure, a certain degree of operation damping effect can be achieved by adjusting the Y-direction dimensions of the plastic pressing block and the rotating block.

[0009] As a preference: an outer tooth plate of an annular structure is connected to the rotating block on the side close to the centrifugal locking block, the outer tooth plate is provided with a screw installation position and an outwardly protruding installation column, the rotating block is provided with an installation channel and a screw hole corresponding to the installation column and the screw installation position, the installation column extends into the installation channel, and a screw is inserted into the screw hole to connect with the outer tooth plate. With the above structure, the outer tooth plate and the rotating block can be connected by the installation column and the screw, and when the rotating block rotates under the action of the armrest shaft, the outer tooth plate can be driven to rotate together.

[0010] Preferably, the outer wall of the outer tooth plate is provided with deceleration helical teeth, and the lower part of the inner tooth plate is provided with a deceleration limiter, and the deceleration limiter is hinged with a movable part, and the end of the movable part away from the hinge can be inserted into the deceleration helical teeth. With the above structure, the rotating block is driven by the armrest shaft to rotate at high speed, and can be decelerated and locked by the deceleration limiter and the centrifugal locking block to ensure safety.

[0011] Preferably, the deceleration limiter also includes a base and a small ball, two hinge holes are arranged on the upper end of the base, and cylinders protruding outward are arranged on the front and rear sides of one end of the movable part close to the hinge hole, and the cylinders extend into the hinge hole correspondingly;

[0012] The small ball is arranged inside the base, and the movable part is located above the small ball. With the above structure, the movable part is hinged on the base, and when the outer gear plate rotates, the movable part moves along with it, and decelerates it. The small ball in the base can play a certain supporting role on the movable part, preventing the movable part from falling into the base and failing to achieve the deceleration locking function.

[0013] As a preferred embodiment: the inner tooth plate and the inner shell are provided with square through holes corresponding to the deceleration limiter, the left and right sides and the bottom of the base are provided with boss structures, the base can be inserted into the square through hole, the end of the base away from the outer tooth plate can extend out of the square through hole, and the extended end is a claw structure, and the upper and lower ends of the inner shell bottom are provided with outer flaps in parallel outside the square through hole, and the outer flaps are correspondingly connected with the claw structure of the base. With the above structure, the deceleration limiter can be clamped in the square through hole through the boss, and the claws at the extended end of the base are fixedly connected with the outer flap of the inner shell, and are not easy to fall off during its operation.

[0014] Preferably, an outer shell is arranged outside the outer tooth plate, and clamps are arranged on the left and right ends of the outer shell. The outer shell is fixedly connected to the edge of the inner shell through the clamps, and a receiving groove is provided at the bottom of the outer shell corresponding to the deceleration limiter. With the above structure, the inner and outer shells can be fixed by the clamps, connected into a whole, and external parts can be prevented from falling in and affecting the working effect.

[0015] A seat armrest, comprising any one of the centrifugal locking mechanisms described above, wherein the centrifugal locking mechanism is located on the inner side of a seat frame, wherein an inner shell contacts the inner side of the seat frame, and the armrest shaft passes through the seat frame and is connected to the centrifugal locking mechanism. With the above structure, the centrifugal locking mechanism can be used in the seat armrest, which is beneficial to improving the safety performance of the car seat armrest.

[0016] Compared with the prior art, the present invention has the following beneficial effects: it can realize a complete collision locking function and reduce safety risks; its locking function has a fast response speed and is not affected by the backrest installation inclination angle and is independent of the collision acceleration direction but only related to the collision energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 An exploded view of the present invention; Figure 3 This is a front view of the present invention with the outer shell 12 removed; Figure 4 for Figure 3 A front view of the outer tooth plate 9 is taken out; Figure 5 Schematic diagram of the connection between the rotating block 3 and the centrifugal locking block 5; Figure 6 Schematic diagram of the internal structure of the deceleration limiter 10. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with embodiments and drawings.

[0024] like Figure 1 , Figure 2 and Figure 4 As shown, a centrifugal locking mechanism comprises an inner shell 2 and an armrest shaft 1, wherein the armrest shaft 1 is arranged on one side of the inner shell 2, and an inner tooth plate 6 of an annular structure is connected to the other side of the inner shell 2, and a rotating block 3 is installed between the inner tooth plate 6 and the inner shell 2, and the outer end of the armrest shaft 1 can pass through the inner shell 2 and be connected to the rotating block 3, and the inner side wall of the inner tooth plate 6 is provided with locking bevel teeth 6a, and a centrifugal locking block 5 is eccentrically hinged on the rotating block 3, and the centrifugal locking block 5 is located in the inner tooth plate 6. One end of the locking block 5 is hinged to the rotating block 3, and the other end is provided with a rotation-stopping bevel tooth 5a corresponding to the locking bevel tooth 6a. The locking bevel tooth 6a can overlap with the rotation-stopping bevel tooth 5a to achieve locking of the armrest shaft 1. When the armrest rotates out at high speed due to collision, the armrest shaft 1 drives the rotating block 3 to achieve high-speed counterclockwise rotation, and the centrifugal locking block 5 connected to the rotating block 3 is rotated clockwise under the action of centrifugal force, thereby wedging with the locking bevel tooth 6a on the inner edge of the inner tooth plate 6, thereby achieving the rotation-stopping function of the armrest, thereby reducing safety risks.

[0025] like Figure 5 As shown, a centrifugal shaft 4 is passed through the rotating block 3, one end of the centrifugal locking block 5 is hinged on the centrifugal shaft 4, a reset torsion spring 7 is sleeved on the centrifugal shaft 4, one end of the reset torsion spring 7 is fixed on the rotating block 3, and the other end rests on the centrifugal locking block 5. When the passenger operates it incorrectly, the armrest rotates backward, and the centrifugal locking block 5 can achieve a normal reset function under the action of the reset torsion spring 7. A limit pin 8 is eccentrically passed through the rotating block 3, and the limit pin 8 is located below the outer end of the armrest shaft 1. The outer wall of the limit pin 8 is tightly pressed against the outer wall of the centrifugal locking block 5 to avoid excessive rotation.

[0026] like Figure 2 As shown, a plastic pressing block 11 is further provided between the inner shell 2 and the rotating block 3. The plastic pressing block 11 is located in the inner shell 2. A through hole is opened in the plastic pressing block 11 corresponding to the armrest shaft 1. By adjusting the Y-direction dimensions of the plastic pressing block 11 and the rotating block 3, a certain degree of operational damping effect can be achieved, thereby improving the stability of the centrifugal locking mechanism.

[0027] An outer tooth plate 9 of an annular structure is connected to the rotating block 3 on the side close to the centrifugal locking block 5, and a screw mounting position 9b and an outwardly protruding mounting column 9a are provided on the outer tooth plate 9. The rotating block 3 is provided with mounting channels 3a and screw holes 3b corresponding to the mounting columns 9a and the screw mounting positions 9b, respectively. The mounting columns 9a extend into the mounting channels 3a, and screws 13 are passed through the screw holes 3b to connect with the outer tooth plate 9. When the armrest shaft 1 drives the rotating block 3 to rotate, the outer tooth plate 9 can rotate along with the rotating block 3.

[0028] like Figure 2 and Figure 3 As shown, the outer wall of the outer tooth plate 9 is provided with deceleration bevel teeth 9c, and the bevel tooth structure of the outer tooth plate 9 is against the outer side of the bevel tooth structure of the inner tooth plate 6, and there is no contact between the bevel teeth of the two. The lower part of the inner tooth plate 6 is provided with a deceleration limiter 10, and a movable part 10b is hinged on the deceleration limiter 10, and the end of the movable part 10b away from the hinge can be stuck in the deceleration bevel teeth 9c. When the outer tooth plate 9 rotates, the movable part 10b rotates together and is decelerated. After a certain degree, it locks the rotating block 3 together with the centrifugal locking block 5 to ensure safety.

[0029] The inner tooth plate 6 and the inner shell 2 are provided with square through holes corresponding to the deceleration limit member 10, and the left and right sides and the bottom of the base 10a are provided with boss structures. The base 10a can be inserted into the square through hole, and the end of the base 10a away from the outer tooth plate 9 can extend out of the square through hole, and the extended end is a claw structure. Outer flaps 2a are arranged in parallel at the upper and lower ends outside the square through hole at the bottom of the inner shell 2. The outer flap 2a is clamped and connected with the claw structure of the base 10a to achieve fixation, so as to prevent the deceleration limit member 10 from falling off during operation.

[0030] An outer shell 12 is arranged on the outer side of the outer tooth plate 9, and clamps 12a are arranged on the left and right ends of the outer shell 12. The outer shell 12 is fixedly connected to the edge of the inner shell 2 through the clamps 12a. A receiving groove is provided at the bottom of the outer shell 12 corresponding to the deceleration limiter 10, connecting them into a closed whole. External substances cannot enter the interior to affect the internal centrifugal locking block 5 and the deceleration limiter 10, making it impossible to achieve the collision locking function.

[0031] like Figure 6As shown, the deceleration limiter 10 also includes a base 10a and a small ball 10c, and two hinge holes are provided at the upper end of the base 10a, and the front and rear sides of the movable part 10b close to one end of the hinge hole are provided with outwardly protruding cylinders, and the cylinders extend into the hinge holes accordingly; the small ball 10c is arranged inside the base 10a, and the movable part 10b is located above the small ball 10c, which can support the movable part 10b and prevent the movable part 10b from falling into the base 10a, thereby failing to decelerate and lock the outer tooth plate 9.

[0032] A seat armrest, such as the centrifugal locking mechanism described above, wherein the centrifugal locking mechanism is located on the inner side of the seat frame, wherein the inner shell 2 contacts the inner side of the seat frame, and the armrest shaft 1 passes through the seat frame and is connected to the centrifugal locking mechanism, which can realize a complete collision locking function, reduce safety risks, and the locking function has a fast response speed, is not affected by the backrest installation inclination angle, has nothing to do with the collision acceleration direction, and is only related to the collision energy.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A centrifugal locking mechanism, characterized in that: The invention comprises an inner shell (2) and an armrest shaft (1), wherein the armrest shaft (1) is arranged on one side of the inner shell (2), and an inner tooth plate (6) of an annular structure is connected to the other side of the inner shell (2), and a rotating block (3) is installed between the inner tooth plate (6) and the inner shell (2), and the outer end of the armrest shaft (1) can pass through the inner shell (2) and be connected to the rotating block (3), and the inner side wall of the inner tooth plate (6) is provided with locking bevel teeth (6a), and a centrifugal locking block (5) is eccentrically hinged on the rotating block (3), and the centrifugal locking block (5) is located in the inner tooth plate (6), and one end of the centrifugal locking block (5) is hinged to the rotating block (3), and the other end is provided with a rotation-stopping bevel tooth (5a) corresponding to the locking bevel tooth (6a), and the locking bevel tooth (6a) can overlap with the rotation-stopping bevel tooth (5a) to achieve locking of the armrest shaft (1).

2. A centrifugal locking structure according to claim 1, characterized in that: A centrifugal shaft (4) is passed through the rotating block (3), one end of the centrifugal locking block (5) is hinged on the centrifugal shaft (4), a return torsion spring (7) is sleeved on the centrifugal shaft (4), one end of the return torsion spring (7) is fixed on the rotating block (3), and the other end rests on the centrifugal locking block (5).

3. A centrifugal locking structure according to claim 2, characterized in that: A limit pin (8) is eccentrically penetrated on the rotating block (3), and the outer wall of the limit pin (8) is tightly pressed against the outer wall of the centrifugal locking block (5).

4. A centrifugal locking mechanism according to claim 1, characterized in that: A plastic pressing block (11) is also provided between the inner shell (2) and the rotating block (3), and the plastic pressing block (11) is located in the inner shell (2).

5. A centrifugal locking mechanism according to claim 1, characterized in that: An outer tooth plate (9) of an annular structure is connected to the rotating block (3) on the side close to the centrifugal locking block (5); a screw mounting position (9b) and an outwardly protruding mounting column (9a) are provided on the outer tooth plate (9); the rotating block (3) is provided with a mounting channel (3a) and a screw hole (3b) corresponding to the mounting column (9a) and the screw mounting position (9b), respectively; the mounting column (9a) extends into the mounting channel (3a), and a screw (13) is inserted into the screw hole (3b) to connect with the outer tooth plate (9).

6. A centrifugal locking structure according to claim 5, characterized in that: The outer side wall of the outer tooth plate (9) is provided with a deceleration bevel tooth (9c), and the lower part of the inner tooth plate (6) is provided with a deceleration limiter (10), and a movable part (10b) is hinged on the deceleration limiter (10), and the end of the movable part (10b) away from the hinge can be inserted into the deceleration bevel tooth (9c).

7. A centrifugal locking mechanism according to claim 6, characterized in that: The deceleration limiter (10) also includes a base (10a) and a small ball (10c), two hinge holes are arranged opposite to each other at the upper end of the base (10a), and cylinders protruding outward are arranged at the front and rear sides of one end of the movable part (10b) close to the hinge holes, and the cylinders extend into the hinge holes accordingly; The small ball (10c) is arranged inside the base (10a), and the movable part (10b) is located above the small ball (10c).

8. A centrifugal locking mechanism according to claim 6 or 7, characterized in that: The inner tooth plate (6) and the inner shell (2) are provided with square through holes corresponding to the deceleration limiter (10); the left and right sides and the bottom of the base (10a) are provided with boss structures; the base (10a) can be inserted into the square through hole; the end of the base (10a) away from the outer tooth plate (9) can extend out of the square through hole, and the extended end is a claw structure; the upper and lower ends of the inner shell (2) are parallelly provided with outer flaps (2a) outside the square through hole at the bottom; the outer flaps (2a) are correspondingly clamped and connected with the claw structures of the base (10a).

9. A centrifugal locking mechanism according to claim 6, characterized in that: An outer shell (12) is arranged on the outer side of the outer tooth plate (9), and clamps (12a) are arranged on the left and right ends of the outer shell (12). The outer shell (12) is fixedly connected to the edge of the inner shell (2) via the clamps (12a), and a receiving groove is provided at the bottom of the outer shell (12) corresponding to the deceleration limiter (10).

10. A chair armrest, characterized in that: It comprises a centrifugal locking mechanism as claimed in any one of claims 1 to 9, wherein the centrifugal locking mechanism is located on the inner side of a seat frame, wherein an inner shell (2) contacts the inner side of the seat frame, and the armrest shaft (1) passes through the seat frame and is connected to the centrifugal locking mechanism.

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