Improvements in and relating to a seat safety handrail

Abstract

The utility model relates to a kind of improved structure of seat safety handrail, it is related to a handrail technology, including symmetrically setting the movable handrail of seat left and right sides, movable handrail includes pedestal, swing setting on the vertical board of pedestal handrail, torsion spring, it is characterized in that, pedestal is vertical board with fixed connection structure, the back of vertical board is provided with shaft sleeve, handrail includes handrail body, the pivot of setting in the tail of handrail body, pivot rotation setting in shaft sleeve, pivot is fixed with stopper on the front of shaft sleeve, two locating stops are fixed on the pedestal corresponding stopper, stopper moves between two locating stops.The utility model compared with prior art, handrail is not easy to deform in use process, handrail is not easy to fall again after rotating open to position.

Description

Technical Field

[0001] This invention relates to armrest technology, and in particular to an improved structure for seat safety armrests. Background Technology

[0002] Due to the operating environment, it is difficult to install seat belts on existing engineering vehicles. Without safety protection, the operator is easily injured in the event of an accident. Patent application 202310510742.8 discloses a seat safety armrest, including movable armrests symmetrically arranged on the left and right sides of the seat. The movable armrest includes a base, a rocker arm swinging on a vertical plate of the base, an armrest driven by the rocker arm, a swing rod connected to the pivot of the rocker arm and linked to the rocker arm, and a spring connecting the free end of the swing rod to the vertical plate of the base. The pivot is located in the middle of the rocker arm and is horizontally rotatably connected to the vertical plate of the base. The spring is a compression spring. The connection point of the spring on the vertical plate of the base is set as follows: when the handrail swings with the rocker arm to the protective position for the operator, the free end of the swing arm is located on one side of the line connecting the connection point of the spring on the vertical plate of the base to the rotation axis of the pivot, and the spring force is in a released state. When the handrail swings with the rocker arm to a position away from the protective position, the free end of the swing arm is located on the other side of the line connecting the connection point of the spring on the vertical plate of the base to the rotation axis of the pivot, and the spring force is in a released state.

[0003] In use, the safety armrests of this invention are installed on the left and right sides of the engineering vehicle seat. After the operator sits on the seat, the armrests are flipped inward to the protective position. At this time, because the free end of the swing arm is located on one side of the line connecting the connection point of the spring on the vertical plate of the base to the rotation axis of the shaft, the armrest is maintained in the protective position under the action of the spring. When the operator needs to leave the seat, the armrests are flipped outward to move away from the protective position. At this time, because the free end of the swing arm is located on the other side of the line connecting the connection point of the spring on the vertical plate of the base to the rotation axis of the shaft, the armrest is maintained away from the protective position under the action of the spring. Since the rotation axis of the shaft is located in the middle of the rocker arm, when the armrest is flipped, it either flips out of the base to the protective position to protect the operator, or it moves away from the outside of the seat, so that the operator can easily get off the seat without being obstructed by the armrest and the base.

[0004] Existing technologies use rocker arms, which are located far from the outside of the seat, preventing the operator from being obstructed by the armrests and base. However, since the armrests are extended forward, the force exerted by the user's hand on the armrests can easily cause the rocker arms to bend and deform.

[0005] Moreover, due to the structural limitations of the seat armrest, only torsion springs can be used. The torque of the torsion spring alone is insufficient, and the armrest has a certain weight. Therefore, it is easy to overcome the torque of the torsion spring and flip down, thus affecting the normal use of the safety armrest. Summary of the Invention

[0006] The purpose of this invention is to provide an improved structure for a seat safety armrest that overcomes one or more of the above-mentioned disadvantages and is less prone to deformation during use.

[0007] The improved structure of the seat safety armrest of the present invention is achieved as follows: It includes movable armrests symmetrically arranged on the left and right sides of the seat. Each movable armrest includes a base, an armrest swingably mounted on a vertical plate-like structure on the base, and a torsion spring. The base is a vertical plate-like structure with a fixed connection, and a bushing is provided on the back of the vertical plate-like structure. The armrest includes an armrest body and a rotating shaft located at the rear of the armrest body. The rotating shaft is rotatably mounted within the bushing. A stop block is fixed on the rotating shaft in front of the bushing. Two positioning stops are fixed on the base corresponding to the stop block. The stop block moves between the two positioning stops. The two positioning stops are configured such that when the armrest is flipped to the open position, the stop block rotates to the first positioning stop under the drive of the rotating shaft; when the armrest is flipped to the safety protection position, the stop block rotates to the second positioning stop under the drive of the rotating shaft. At the stop block, one end of the torsion spring is connected to the base, and the other end is connected to the rotating shaft. The first connection point of the torsion spring on the base and the second connection point of the torsion spring on the rotating shaft are configured such that when the stop block rotates to the second positioning stop block under the drive of the rotating shaft, the line connecting the first connection point of the torsion spring on the base and the second connection point of the torsion spring on the rotating shaft is located on one side of the axis of the rotating shaft, and the stop block is pressed against the second positioning stop block under the elastic force of the torsion spring. When the stop block rotates in the opposite direction to the first positioning stop block under the drive of the rotating shaft, the line connecting the first connection point of the torsion spring on the base and the second connection point of the torsion spring on the rotating shaft is located on the other side of the axis of the rotating shaft, and the stop block is pressed against the first positioning stop block under the elastic force of the torsion spring.

[0008] In use, the safety armrests of this invention are installed on the left and right sides of the engineering vehicle seat. After the operator sits on the seat, the armrests are flipped inward to the protective position. At this time, because the line connecting the torsion spring on the base and the torsion spring on the rotating shaft is located on one side of the rotating shaft axis, and under the elastic force of the torsion spring, the stop block is pressed against the second positioning stop block. Under the action of the spring, the armrest is maintained in the protective position. When the operator needs to leave the seat, the armrests are flipped outward to move away from the protective position. At this time, the line connecting the torsion spring on the base and the torsion spring on the rotating shaft is located on the other side of the rotating shaft axis, and under the elastic force of the torsion spring, the stop block is pressed against the first positioning stop block. Under the action of the spring, the armrest is maintained in the position away from the protective position. Because the rotation of the rotating shaft is set on the bushing, the length of the shaft is increased. With the support of the bushing, the bending resistance of the shaft is greatly enhanced, making the armrest less prone to deformation during use.

[0009] Preferably, the fixed connection structure on the base is a horizontal plate with screw holes, and a reinforcing column is fixed between the bushing and the horizontal plate. The function of the reinforcing column is to enhance the bending resistance of the bushing, thereby improving the bending resistance of the pivot, so as to ensure that the handrail will not deform along the pivot during use.

[0010] Preferably, a rocker arm is fixedly connected to the rear end of the bushing through the rotating shaft. The rocker arm swings as the rotating shaft rotates. A spring is connected between the free end of the rocker arm and the rear end of the bushing. The position of the third connection point of the spring at the rear end of the bushing is set such that when the stop block rotates to the first positioning stop under the drive of the rotating shaft, the line connecting the fourth connection point of the spring at the free end of the rocker arm and the third connection point of the spring at the rear end of the bushing is located on one side of the axis of the rotating shaft. Under the action of the spring force, the stop block is pressed against the first positioning stop. When the stop block rotates to the second positioning stop under the drive of the rotating shaft, the line connecting the fourth connection point of the spring at the free end of the rocker arm and the third connection point of the spring at the rear end of the bushing is located on the other side of the axis of the rotating shaft. Under the action of the spring force, the stop block is pressed against the second positioning stop.

[0011] When in use, because the lever torque of the spring force on the swing arm is relatively large, a large force is required to turn the handrail. Thus, when the handrail is opened and in the vertical position, the weight of the handrail is far from enough to overcome the torsion spring and the torque generated by the spring. Therefore, after the handrail is turned and opened to the full position, it is not easy for the handrail to fall back down without sufficient external force.

[0012] Compared with existing technologies, this invention has the advantages that the handrail is not easily deformed during use and is not easily dropped again after the handrail is rotated and opened to the correct position. Attached Figure Description

[0013] Figure 1This is a structural schematic diagram of the seat safety armrest of the present invention; Figure 2 This is a schematic diagram of the structure of the torsion spring in this invention; Figure 3 This is a schematic diagram of the spring section of the present invention; Figure 4 This is a diagram showing the handrail in a safe and protected position.

[0014] Explanation of reference numerals in the attached drawings: A - movable handrail; B - first connection point; C - second connection point; D - third connection point; E - fourth connection point; 1 - base; 101 - vertical plate; 102 - fixed connection structure; 2 - handrail; 201 - handrail body; 202 - pivot; 3 - torsion spring; 4 - bushing; 5 - stop; 6 - positioning stop; 7 - swing arm; 8 - spring; 9 - sensor; 10 - trigger head; 11 - reinforcing column. Detailed Implementation

[0015] The improved structure of the seat safety armrest of the present invention will now be described in further detail with reference to the accompanying drawings and embodiments: like Figure 1As shown, the improved structure of the seat safety armrest of the present invention includes movable armrests A symmetrically arranged on the left and right sides of the seat. The movable armrests A include a base 1, an armrest 2 swingably arranged on a vertical plate 101 on the base 1, and a torsion spring 3. The special feature is that the base 1 is a vertical plate 101 with a fixed connection structure 102. A bushing 4 is provided on the back of the vertical plate 101. The armrest 2 includes an armrest body 201 and a rotating shaft 202 arranged at the tail of the armrest body 201. The rotating shaft 202 is rotatably arranged in the bushing 4. A stop block 5 is fixed on the rotating shaft 202 in front of the bushing 4. Two positioning stops 6 are fixed on the vertical plate 101 of the base 1 corresponding to the stop block 5. The stop block 5 moves between the two positioning stops 6. The two positioning stops 6 are configured as follows: when the handrail 2 is flipped to the open position, the stop block 5 rotates to the first positioning stop 6 under the drive of the rotating shaft 202; when the handrail 2 is flipped to the safety protection position, the stop block 5 rotates to the second positioning stop 6 under the drive of the rotating shaft 202. One end of the torsion spring 3 is connected to... On the connecting post of the vertical plate 101 of the base 1, the other end of the torsion spring 3 is connected to the connecting post of the rotating shaft 202; the first connection point B of the torsion spring 3 on the vertical plate 101 of the base 1 and the second connection point C of the torsion spring 3 on the rotating shaft 202 are set as follows: when the stop block 5 rotates to the second positioning stop block 6 under the drive of the rotating shaft 202, the line connecting the first connection point B of the torsion spring 3 on the vertical plate 101 of the base 1 and the second connection point C of the torsion spring 3 on the rotating shaft 202 is aligned. On one side of the axis of the rotating shaft 202, and under the action of the torsion spring 3, the stop block 5 is pressed against the second positioning stop block 6; when the stop block 5 is rotated in the opposite direction to the first positioning stop block 6 under the drive of the rotating shaft 202, the line connecting the first connection point B of the torsion spring 3 on the vertical plate 101 of the base 1 and the second connection point C of the torsion spring 3 on the rotating shaft 202 is located on the other side of the axis of the rotating shaft 202, and under the action of the torsion spring 3, the stop block 5 is pressed against the first positioning stop block 6.

[0016] Preferably, a rocker arm 7 is fixedly connected to the rear end of the rotating shaft 202 through the bushing 4. The rocker arm 7 swings as the rotating shaft 202 rotates. A spring 8 is connected between the free end of the rocker arm 7 and the rear end of the bushing 4. The position of the third connection point D of the spring 8 at the rear end of the bushing 4 is set such that when the stop block 5 rotates to the first positioning stop block 6 under the drive of the rotating shaft 202, the line connecting the fourth connection point E of the free end of the rocker arm 7 and the third connection point D of the spring 8 at the rear end of the bushing 4 is located on one side of the axis of the rotating shaft 202. Under the action of the spring force of the spring 8, the stop block 5 is pressed against the first positioning stop block 6. When the stop block 5 rotates to the second positioning stop block 6 under the drive of the rotating shaft 202, the line connecting the fourth connection point E of the free end of the rocker arm 7 and the third connection point D of the spring 8 at the rear end of the bushing 4 is located on the other side of the axis of the rotating shaft 202. Under the action of the spring force of the spring 8, the stop block 5 is pressed against the second positioning stop block 6.

[0017] Alternatively, a connecting rod can be fixedly connected to the rear end of the bushing 4. A spring is installed between the rear end of the rotating shaft 202 (exiting the bushing 4) and the free end of the connecting rod. The connection point of the spring on the rear end of the rotating shaft 202 is configured such that when the stop block 5 rotates to the first positioning stop block 6 under the drive of the rotating shaft 202, the line connecting the spring's connection point on the free end of the connecting rod and the spring's connection point on the rear end of the rotating shaft 202 is located on one side of the axis of the rotating shaft 202. Under the action of the spring force, the stop block 5 is pressed against the first positioning stop block 6. When the stop block 5 rotates to the second positioning stop block 6 under the drive of the rotating shaft 202, the line connecting the spring's connection point on the free end of the connecting rod and the spring's connection point on the rear end of the rotating shaft 202 is located on the other side of the axis of the rotating shaft 202. Under the action of the spring force, the stop block 5 is pressed against the second positioning stop block 6. This solution, due to its smaller torque, is not as effective as the swing arm technique described above.

[0018] Preferably, a sensor 9 is provided on the vertical plate 101 of the base 1, and a trigger head 10 is provided on the rotating shaft 202 of the armrest 2 corresponding to the sensor 9. When the armrest 2 is flipped to the safety protection position, the trigger head 10 is driven by the rotating shaft 202 of the armrest 2 to rotate to the sensor 9 and activate the sensor 9. In this way, the control signal output by the sensor 9 controls the vehicle to operate only when the armrest 2 is flipped to the safety protection position, so as to ensure the safety of the driver.

[0019] Preferably, the fixed connection structure 102 on the base 1 is a horizontal plate with screw holes, and a reinforcing column 11 is fixed between the bushing 4 and the horizontal plate.

Claims

1. An improved structure for a seat safety armrest, comprising movable armrests symmetrically arranged on the left and right sides of a seat, each movable armrest including a base, an armrest swingably mounted on a vertical plate-like structure on the base, and a torsion spring, characterized in that... The base is a vertical plate with a fixed connection structure. A bushing is located on the back of the vertical plate. The handrail includes a handrail body and a rotating shaft located at the rear of the handrail body. The rotating shaft is rotatably mounted within the bushing. A stop is fixed on the rotating shaft in front of the bushing. Two positioning stops are fixed on the base corresponding to the stop. The stop moves between the two positioning stops. The two positioning stops are configured as follows: when the handrail is flipped to the open position, the stop rotates to the first positioning stop under the drive of the rotating shaft; when the handrail is flipped to the safety protection position, the stop rotates to the second positioning stop under the drive of the rotating shaft. One end of a torsion spring is connected to the base, and the other end is connected to the rotating shaft. The first connection point on the base and the second connection point of the torsion spring on the rotating shaft are configured such that when the stop block rotates to the second positioning stop block under the drive of the rotating shaft, the line connecting the first connection point of the torsion spring on the base and the second connection point of the torsion spring on the rotating shaft is located on one side of the axis of the rotating shaft, and the stop block is pressed against the second positioning stop block under the elastic force of the torsion spring; when the stop block rotates in the opposite direction to the first positioning stop block under the drive of the rotating shaft, the line connecting the first connection point of the torsion spring on the base and the second connection point of the torsion spring on the rotating shaft is located on the other side of the axis of the rotating shaft, and the stop block is pressed against the first positioning stop block under the elastic force of the torsion spring. A rocker arm is fixedly connected to the rear end of the bushing through the rotating shaft. The rocker arm swings as the rotating shaft rotates. A spring is connected between the free end of the rocker arm and the rear end of the bushing. The position of the third connection point of the spring at the rear end of the bushing is set such that when the stop block rotates to the first positioning stop under the drive of the rotating shaft, the line connecting the fourth connection point of the spring at the free end of the rocker arm and the third connection point of the spring at the rear end of the bushing is located on one side of the axis of the rotating shaft. Under the action of the spring force, the stop block is pressed against the first positioning stop. When the stop block rotates to the second positioning stop under the drive of the rotating shaft, the line connecting the fourth connection point of the spring at the free end of the rocker arm and the third connection point of the spring at the rear end of the bushing is located on the other side of the axis of the rotating shaft. Under the action of the spring force, the stop block is pressed against the second positioning stop.

2. The improved structure of the seat safety armrest according to claim 1, characterized in that, The fixed connection structure on the base is a horizontal plate with screw holes, and a reinforcing column is fixed between the bushing and the horizontal plate.

3. The improved structure of the seat safety armrest according to claim 1 or 2, characterized in that, Sensors are installed on the vertical plate-like structure of the base, and trigger heads are located on the rotating shaft of the handrail corresponding to the sensors. When the handrail is rotated to the safe protection position, the trigger heads are driven by the rotating shaft of the handrail to rotate to the sensor and activate the sensor.

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