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 advantages that the complete collision locking function can be achieved, safety risks are reduced, and the locking function is high in response speed, not affected by the installation inclination angle of the backrest, irrelevant to the collision acceleration direction and only relevant to collision energy.

Description

Technical Field

[0001] This utility model relates to the field of seat armrest technology, specifically to a centrifugal locking mechanism and a seat armrest. Background Technology

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

[0003] However, current car seat products often lack locking mechanisms in their non-use positions for single-arm or small-to-medium-sized armrests, posing a serious safety hazard. During vehicle operation, in emergencies such as collisions or sudden braking, armrests without locking mechanisms may fly off due to inertia. This not only startles passengers but also poses a risk of injury if the armrest collides with their bodies. Furthermore, armrests typically contain components such as cup holders and buttons. If these components scatter during flight, they could become projectiles within the vehicle, further increasing the risk of injury. Especially if these components strike critical areas such as the head or neck, the consequences could be disastrous. This not only diminishes the passenger experience but also compromises the overall safety of the vehicle. Summary of the Invention

[0004] To solve the above technical problems, this utility model 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 key features of which are: an inner housing and a handrail pivot, the handrail pivot is provided on one side of the inner housing, and an annular internal toothed plate is connected to the other side of the inner housing. A rotating block is installed between the internal toothed plate and the inner housing. The outer end of the handrail pivot can pass through the inner housing and connect to the rotating block. Locking helical teeth are arranged on the inner sidewall of the internal toothed plate. A centrifugal locking block is eccentrically hinged on the rotating block. The centrifugal locking block is located inside the internal toothed plate. One end of the centrifugal locking block is hinged to the rotating block, and the other end is provided with an anti-rotation helical tooth corresponding to the locking helical tooth. The locking helical tooth can engage with the anti-rotation helical tooth to lock the handrail pivot. With the above structure, after the handrail is hit, the handrail shaft can drive the rotating block to rotate at high speed. The centrifugal locking block, which is hinged to the rotating block, rotates under the action of centrifugal force. Its rotation direction is opposite to that of the rotating block, so as to wedge tightly with the locking helical teeth of the inner tooth plate, thereby realizing the anti-rotation function of the handrail and improving the safety of the handrail.

[0006] Preferably, a centrifugal shaft is threaded through the rotating block, one end of the centrifugal locking block is hinged to the centrifugal shaft, and a return torsion spring is sleeved on the centrifugal shaft. One end of the return torsion spring is fixed to the rotating block, and the other end rests against the centrifugal locking block. With this structure, if a passenger misoperates, the handrail rotates backward, and the centrifugal locking block can achieve its normal reset function under the action of the return torsion spring.

[0007] Preferably, a limiting pin is eccentrically inserted into the rotating block, and the outer wall of the limiting pin abuts against the outer wall of the centrifugal locking block. This structure restricts the position of the centrifugal locking block and prevents excessive rotation.

[0008] Preferably, a plastic pressure block is provided between the inner housing and the rotating block, and the plastic pressure block is located within the inner housing. With this structure, a certain degree of operational damping can be achieved by adjusting the Y-axis dimensions of the plastic pressure block and the rotating block.

[0009] Preferably, an annular outer toothed plate is connected to a rotating block on the side near the centrifugal locking block. The outer toothed plate has screw mounting positions and outwardly protruding mounting posts. The rotating block has mounting channels and screw holes corresponding to the mounting posts and screw mounting positions, respectively. The mounting posts extend into the mounting channels, and screws are inserted into the screw holes to connect with the outer toothed plate. With this structure, the outer toothed plate and the rotating block can be connected via the mounting posts and screws. When the rotating block rotates under the action of the handrail shaft, it can drive the outer toothed plate to rotate together.

[0010] Preferably, the outer toothed plate has deceleration helical teeth on its outer side wall, and a deceleration limiting member is provided at the lower part of the inner toothed plate. A movable member is hinged to the deceleration limiting member, and the end of the movable member away from the hinge can be engaged in the deceleration helical teeth. With the above structure, the rotating block is driven to rotate at high speed by the handrail shaft, and can be decelerated and locked by the deceleration limiting member and the centrifugal locking block to ensure safety.

[0011] Preferably, the deceleration limiting component also includes a base and a small ball. Two hinge holes are opened at the upper end of the base. The front and rear sides of the movable component near the hinge holes are provided with outwardly protruding cylinders, which extend into the hinge holes.

[0012] The small ball is arranged inside the base, and the movable component is located above the small ball. With this structure, the movable component is hinged to the base. When the outer gear plate rotates, the movable component moves along with it, thus slowing it down. The small ball inside the base can provide some support for the movable component, preventing it from falling into the base and thus failing to achieve the deceleration and locking function.

[0013] Preferably, the inner gear plate and the inner housing have square through holes corresponding to the deceleration limiting component. The base has bosses on its left and right sides and bottom, allowing it to be inserted into the square through holes. One end of the base away from the outer gear plate extends out of the square through hole, and this extended end is a claw structure. Parallel outer flaps are arranged at the top and bottom of the inner housing outside the square through hole, and these outer flaps are correspondingly and securely connected to the claw structure of the base. With this structure, the deceleration limiting component can be securely held in the square through hole by the bosses, and the claws at the extended end of the base are fixedly connected to the outer flaps of the inner housing, preventing them from easily falling off during operation.

[0014] Preferably, an outer shell is provided on the outer side of the outer toothed plate, and clips are provided on both the left and right ends of the outer shell. The outer shell is fixedly connected to the edge of the inner shell through the clips, and a receiving groove is provided on the bottom of the outer shell corresponding to the deceleration limiting member. With the above structure, the inner and outer shells can be fixed by the clips, connecting them into a whole, preventing external parts from falling in and affecting the working effect.

[0015] A seat armrest includes a centrifugal locking mechanism as described above. The centrifugal locking mechanism is located inside the seat frame, with the inner housing contacting the inner side of the seat frame. The armrest pivot passes through the seat frame and is connected to the centrifugal locking mechanism. This structure allows the centrifugal locking mechanism to be used in seat armrests, improving the safety performance of automotive seat armrests.

[0016] Compared with the prior art, the beneficial effects of this utility model are: it can realize a complete collision locking function, reduce safety risks, its locking function has a fast response speed, and is not affected by the backrest installation tilt angle, and is not related to the direction of collision acceleration, but only to the collision energy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is an exploded view of the present invention;

[0019] Figure 3 This is a front view of the present invention without the outer shell 12;

[0020] Figure 4 for Figure 3 Take out the front view of the outer toothed plate 9;

[0021] Figure 5 A schematic diagram showing the connection between rotating block 3 and centrifugal locking block 5;

[0022] Figure 6 This is a schematic diagram of the internal structure of the deceleration limiter 10. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0024] like Figure 1 , Figure 2 and Figure 4 As shown, a centrifugal locking mechanism includes an inner housing 2 and a handrail shaft 1. The handrail shaft 1 is disposed on one side of the inner housing 2, and an annular internal toothed plate 6 is connected to the other side of the inner housing 2. A rotating block 3 is installed between the internal toothed plate 6 and the inner housing 2. The outer end of the handrail shaft 1 can pass through the inner housing 2 and connect to the rotating block 3. Locking helical teeth 6a are arranged on the inner sidewall of the internal toothed plate 6. A centrifugal locking block 5 is eccentrically hinged to the rotating block 3. The centrifugal locking block 5 is located inside the internal toothed plate 6. One end of the locking block 5 is hinged to the rotating block 3, and the other end is provided with an anti-rotation helical tooth 5a corresponding to the locking helical tooth 6a. The locking helical tooth 6a can engage with the anti-rotation helical tooth 5a to lock the handrail shaft 1. When the handrail rotates out at high speed during a collision, the handrail shaft 1 drives the rotating block 3 to rotate counterclockwise at high speed. The centrifugal locking block 5, which is connected to the rotating block 3, rotates out clockwise under the action of centrifugal force, thereby wedging tightly with the locking helical tooth 6a on the inner edge of the inner tooth plate 6, realizing the anti-rotation function of the handrail, thereby reducing safety risks.

[0025] like Figure 5 As shown, a centrifugal shaft 4 is threaded through the rotating block 3, and one end of the centrifugal locking block 5 is hinged to 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 to the rotating block 3, and the other end rests against the centrifugal locking block 5. When a passenger misoperates, the handrail rotates backward, and the centrifugal locking block 5 can achieve normal reset under the action of the reset torsion spring 7. A limiting pin 8 is eccentrically threaded through the rotating block 3. The limiting pin 8 is located below the outer end of the handrail rotating shaft 1. The outer side wall of the limiting pin 8 abuts against the outer side wall of the centrifugal locking block 5 to prevent excessive rotation.

[0026] like Figure 2 As shown, a plastic pressure block 11 is also provided between the inner shell 2 and the rotating block 3. The plastic pressure block 11 is located in the inner shell 2. The plastic pressure block 11 has a through hole corresponding to the armrest pivot 1. By adjusting the Y-axis dimensions of the plastic pressure block 11 and the rotating block 3, a certain degree of operation damping effect can be achieved, thereby improving the stability of the centrifugal locking mechanism.

[0027] An annular outer toothed plate 9 is connected to a rotating block 3 on one side near the centrifugal locking block 5. The outer toothed plate 9 is provided with a screw mounting position 9b and an outwardly protruding mounting post 9a. The rotating block 3 is provided with a mounting channel 3a and a screw hole 3b corresponding to the mounting post 9a and the screw mounting position 9b, respectively. The mounting post 9a extends into the mounting channel 3a and a screw 13 is inserted into the screw hole 3b to connect with the outer toothed plate 9. When the handrail shaft 1 drives the rotating block 3 to rotate, the outer toothed plate 9 can rotate with the rotating block 3.

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

[0029] The inner toothed plate 6 and the inner housing 2 are provided with square through holes corresponding to the deceleration limiting member 10. The base 10a is provided with boss structures on the left and right sides and the bottom. The base 10a can be inserted into the square through hole. The end of the base 10a away from the outer toothed plate 9 can protrude from the square through hole. Its protruding end is a claw structure. The upper and lower ends of the bottom of the inner housing 2 outside the square through hole are provided with outward flaps 2a. The outward flaps 2a are correspondingly and tightly connected with the claw structure of the base 10a to achieve fixation and prevent the deceleration limiting member 10 from falling off during operation.

[0030] An outer shell 12 is provided on the outer side of the outer toothed plate 9. Clips 12a are provided 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 clips 12a. The bottom of the outer shell 12 is provided with a receiving groove corresponding to the deceleration limiting member 10. They are connected to form a sealed whole, so that external substances cannot enter the interior and affect the centrifugal locking block 5 and the deceleration limiting member 10 inside, making it impossible to achieve the collision locking function.

[0031] like Figure 6As shown, the deceleration limiting member 10 also includes a base 10a and a small ball 10c. Two hinge holes are opened at the upper end of the base 10a. The movable member 10b has outwardly protruding cylinders on both sides near the hinge holes, which extend into the hinge holes. The small ball 10c is arranged inside the base 10a, and the movable member 10b is located above the small ball 10c, which can support the movable member 10b and prevent the movable member 10b from falling into the base 10a, thus preventing the outer tooth plate 9 from being decelerated and locked.

[0032] A type of seat armrest, as described above, includes a centrifugal locking mechanism located inside the seat frame. The inner housing 2 contacts the inner side of the seat frame. The armrest pivot 1 passes through the seat frame and connects to the centrifugal locking mechanism. This mechanism enables complete collision locking, reducing safety risks. Furthermore, the locking function has a fast response time, is unaffected by the backrest installation angle, and is independent of the direction of collision acceleration, depending only on the collision energy.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A centrifugal locking mechanism, characterized in that: The device includes an inner shell (2) and a handrail pivot (1). The handrail pivot (1) is provided on one side of the inner shell (2), and an annular internal toothed plate (6) is connected to the other side of the inner shell (2). A rotating block (3) is installed between the internal toothed plate (6) and the inner shell (2). The outer end of the handrail pivot (1) can pass through the inner shell (2) and connect to the rotating block (3). Locking helical teeth (6a) are provided on the inner sidewall of the internal toothed plate (6). A centrifugal locking block (5) is eccentrically hinged on the rotating block (3). The centrifugal locking block (5) is located inside the internal toothed plate (6). One end of the centrifugal locking block (5) is hinged to the rotating block (3), and the other end is provided with an anti-rotation helical tooth (5a) corresponding to the locking helical tooth (6a). The locking helical tooth (6a) can engage with the anti-rotation helical tooth (5a) to lock the handrail pivot (1).

2. The centrifugal locking mechanism according to claim 1, characterized in that: A centrifugal shaft (4) is mounted on the rotating block (3). One end of the centrifugal locking block (5) is hinged to the centrifugal shaft (4). A reset torsion spring (7) is mounted 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).

3. The centrifugal locking mechanism according to claim 2, characterized in that: A limiting pin (8) is eccentrically inserted on the rotating block (3), and the outer side wall of the limiting pin (8) abuts against the outer side wall of the centrifugal locking block (5).

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

5. The centrifugal locking mechanism according to claim 1, characterized in that: A ring-shaped outer toothed plate (9) is connected to a rotating block (3) on one side near the centrifugal locking block (5). The outer toothed plate (9) is provided with a screw mounting position (9b) and an outwardly protruding mounting post (9a). The rotating block (3) is provided with a mounting channel (3a) and a screw hole (3b) corresponding to the mounting post (9a) and the screw mounting position (9b), respectively. The mounting post (9a) extends into the mounting channel (3a) and a screw (13) is inserted into the screw hole (3b) to connect with the outer toothed plate (9).

6. The centrifugal locking mechanism according to claim 5, characterized in that: The outer tooth plate (9) has deceleration helical teeth (9c) arranged on its outer side wall. A deceleration limiting member (10) is provided at the lower part of the inner tooth plate (6). A movable member (10b) is hinged on the deceleration limiting member (10). The end of the movable member (10b) away from the hinge can be inserted into the deceleration helical teeth (9c).

7. The centrifugal locking mechanism according to claim 6, characterized in that: The deceleration limiting component (10) also includes a base (10a) and a ball (10c). Two hinge holes are opened at the upper end of the base (10a). The movable component (10b) has outwardly protruding cylinders on the front and rear sides near the hinge holes, and the cylinders extend into the hinge holes. The ball (10c) is arranged inside the base (10a), and the movable part (10b) is located above the ball (10c).

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

9. The centrifugal locking mechanism according to claim 6, characterized in that: An outer shell (12) is provided on the outside of the outer tooth plate (9). Clips (12a) are provided 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 clips (12a). A receiving groove is provided at the bottom of the outer shell (12) corresponding to the deceleration limiting member (10).

10. A type of armrest for a seat, characterized in that: Includes the centrifugal locking mechanism as described in any one of claims 1 to 9, wherein the centrifugal locking mechanism is located inside the seat frame, wherein the inner housing (2) is in contact with the inner side of the seat frame, and the armrest pivot (1) passes through the seat frame and is connected to the centrifugal locking mechanism.

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