Automatic handrail

Abstract

The present invention provides an automatic handrail, belonging to the technical field of daily necessities. It solves the problem that the existing handrail is prone to fall off after adsorption. This automatic handrail includes a handle-shaped outer shell. Both ends of the outer shell are provided with connection ports. Suction cups are provided at both connection ports and part of the suction cups extends out of the connection ports. The automatic handrail further includes a driving motor and a trigger member. The driving motor is connected inside the outer shell and is connected to the suction cup through a transmission mechanism. The driving motor can drive the suction cup to move into the connection port after the trigger member is triggered, and make the end faces at both ends of the outer shell tightly press on the corresponding suction cups respectively. This automatic handrail has the advantage of good adsorption stability.

Description

Technical Field

[0001] The present invention belongs to the technical field of daily necessities, and relates to an automatic handrail, in particular to a portable automatic handrail that can be automatically fixed. Background Art

[0002] Currently, various handrails on the market are firmly fixed to walls, floors or other fixable places by means such as screw fixation. When these fixed handrails are fixed, they often damage the wall surface, and are not easy to move after being fixed, and are relatively inconvenient to disassemble and assemble.

[0003] For this reason, people have designed a portable handrail and applied for a Chinese patent (its application number is: 201920670661.3; its publication number is: CN209904601U). The portable handrail includes an outer shell. The middle part of the outer shell is a hand-held part. Both ends of the outer shell are provided with circular enlarged parts. A flip button is installed at the upper end of the circular enlarged part, a suction cup is installed at the bottom end of the circular enlarged part, a spring is installed inside the circular enlarged part, and the flip button is connected to the suction cup through a connecting rod passing through the spring. One side of the spring is fixed to the suction cup end of the connecting rod, and the other side is stuck on the top wall of the enlarged part of the shell. When the flip button is flipped, the spring is compressed by pulling the connecting rod, increasing the negative pressure attraction between the suction cup and the plane to which it is attached. When using this portable handrail, press the handrail against the wall with the suction cup facing the wall surface, so that the suction cup is flattened, reducing the air inside the suction cup. Then, flip the two flip buttons at the upper end respectively, so that the suction cup is pulled out in the direction away from the wall, increasing the cavity between the suction cup and the wall, and further increasing the pressure difference on both sides of the suction cup, so that the handrail is firmly fixed on the wall under the air pressure.

[0004] However, when using the above portable handrail, the user needs to press the shell against the wall with one hand to prevent the handrail from sliding or falling off during the operation, and use the other hand to flip the two flip buttons at the upper end in turn to make the suction cup firmly suck the wall. During the process of flipping one of the flip buttons, due to uneven force on both ends of the shell, the shell is prone to tilt, and then the moving direction of the suction cup is inclined. If the pulled-out distance of the suction cup is relatively large, the pulled-out distance on one side of the suction cup will be greater than that on the other side, resulting in air leakage between the suction cup and the wall and weakening the adsorption force of the suction cup. At the same time, relying solely on the way of the suction cup adsorbing on the wall, the adsorption force of the suction cup is likely to decrease after long-term use, causing the handrail to fall off. Summary of the Invention

[0005] The purpose of the present invention is to address the above problems existing in the prior art, and propose an automatic handrail, which solves the problem that the existing handrail is prone to fall off after adsorption.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The automatic handrail includes a handle-shaped housing. Both ends of the housing are provided with connection ports. Suction cups are arranged at both connection ports and part of the suction cups extends out of the connection ports. It is characterized in that the automatic handrail further includes a driving motor and a trigger member. The driving motor is connected inside the housing and is connected to the suction cup through a transmission mechanism. The driving motor can drive the suction cup to move into the connection port after the trigger member is triggered, and make the end faces at both ends of the housing tightly press on the corresponding suction cups respectively.

[0008] When this automatic handrail is in use, the user holds the middle part of the housing with one hand, presses the two connection ports on the same side of the housing against the wall. The suction cups that partially extend out of the connection ports are flattened, and the air between the suction cups and the wall is squeezed out, reducing the internal air pressure. The driving motor is triggered by the trigger member to work, and the driving motor drives the suction cup and the housing to move towards each other through the transmission of the transmission mechanism. Since the suction cup has been adsorbed on the wall and cannot move significantly, the work of the driving motor will cause the suction cup to move slightly towards the housing direction, increasing the space between the suction cup and the wall, further reducing the air pressure, making the pressure difference inside and outside the suction cup increase, and the suction cup adsorbs more firmly. At the same time, the housing moves towards the suction cup under the drive of the driving motor, and the end face of the housing at the connection port presses the suction cup tightly against the wall, making the edge of the suction cup combine more closely with the wall, not leaking air, and not easily falling off even after long-term use.

[0009] During the use of this automatic handrail, only by triggering the trigger member on the housing can the driving motor automatically drive the action of the suction cup. There is no need for the user to manually apply force. During the adsorption process, the whole housing moves stably, and it is not easy to have uneven force and tilting situations, which can effectively avoid the situation of unilateral air leakage of the suction cup caused by manual operation. At the same time, pressing the suction cup tightly by the end face of the housing can better ensure the sealing between the suction cup and the wall, avoid air leakage, and thus ensure that the suction cup can still maintain sufficient adsorption force and is not easily fallen off after long-term use.

[0010] In the above automatic handrail, a pressure sensor capable of detecting the air pressure on the side of the suction cup away from the housing is connected to the suction cup. The driving motor can drive the suction cup to move into the housing when the air pressure value detected by the pressure sensor is higher than the set value. In order to deal with the situation of air leakage of the suction cup caused by uneven wall surface or other factors, a pressure sensor is added to this automatic handrail to detect the air pressure between the suction cup and the wall. When the air pressure rises due to air leakage, the driving motor can automatically work, further pulling the suction cup to deform slightly to increase the space between the suction cup and the wall, reducing the air pressure, ensuring that the automatic handrail can be stably fixed on the wall and will not fall off. The specific air pressure set value can be obtained through actual experiments. For example, this air pressure value can be a value in the range of 0 - 50 kPa, such as 20 kPa.

[0011] In the above-mentioned automatic handrail, the suction cup includes a disc-shaped main body and a rod-shaped rod portion. The rod portion is fixed on the main body along the axial direction of the main body. The air pressure sensor is fixed between the rod portion and the main body, and a through hole is formed through the main body at a position corresponding to the air pressure sensor. By arranging the air pressure sensor between the rod portion and the main body and detecting the air pressure on one side of the suction cup through the through hole, the influence of the external air pressure can be avoided, and the detection result is more accurate. Cooperating with the automatic operation of the driving motor, the fixation of the automatic handrail can be better realized, and the stability and reliability are good.

[0012] In the above-mentioned automatic handrail, the transmission mechanism includes a first screw, a first nut, a second nut, a first connecting rod and a second connecting rod. The first screw is rotatably connected in the housing, and the driving motor can drive the first screw to rotate circumferentially. The thread directions on the outer sides of both ends of the first screw are opposite. The first nut and the second nut are respectively threadedly connected to the outer sides of both ends of the first screw. One end of the first connecting rod is hinged to the first nut, and the other end is hinged to the suction cup. One end of the second connecting rod is hinged to the second nut, and the other end is hinged to the suction cup. By means of the threads with opposite directions on the outer sides of both ends of the first screw, the first nut and the second nut are driven to move towards each other or move in the opposite direction. When the two move towards each other, the suction cup can be pushed into the housing through the first connecting rod and the second connecting rod. Since the movement of the suction cup is the simultaneous action of the first connecting rod and the second connecting rod, the suction cup is evenly stressed and the movement is stable, which can avoid the situation of unilateral air leakage due to tilting during movement, and ensure the stability of the suction cup adsorbing the wall surface.

[0013] In the above-mentioned automatic handrail, a travel switch is also fixed in the housing at the position of the transmission mechanism. The limit position of the transmission mechanism is restricted by the travel switch to avoid excessive operation of the driving motor.

[0014] As another situation, in the above-mentioned automatic handrail, the transmission mechanism includes a second screw rotatably connected in the housing and a third nut threadedly connected to the outer side of the second screw. The arrangement direction of the second screw is consistent with the movement direction of the suction cup. The driving motor can drive the second screw to rotate circumferentially. The third nut is fixed to the suction cup. When the driving motor works, the second screw rotates circumferentially. Since the third nut is fixed to the suction cup, the third nut will not rotate circumferentially but move along the axial direction of the second screw, thereby driving the suction cup to move along the axial direction of the second screw. Guided by the second screw, the movement of the suction cup is more stable.

[0015] In the above-mentioned automatic handrail, the trigger member includes a button connected to the housing. The operation of the automatic handrail can be started and controlled by the user manually pressing the button on the housing, which is convenient to use.

[0016] As another case, in the above-mentioned automatic handrail, the trigger includes a position sensor fixed on the housing. The position sensor can be used to detect whether the user's hand is blocked or to detect the situation near the wall, and both can control the start of the drive motor.

[0017] In the above-mentioned automatic handrail, a boosting spring is further arranged in the housing. One end of the boosting spring abuts against the housing, and the other end acts on the suction cup. The suction cup has a tendency to move into the housing under the elastic force of the boosting spring. The boosting spring is provided to assist the suction cup in adsorbing the wall, reducing the load on the drive motor and making the operation of the drive motor more stable.

[0018] In the above-mentioned automatic handrail, a power supply unit capable of supplying power to the drive motor is further connected to the housing. Electric energy is a more convenient energy source and can provide a stable energy source for the operation of the drive motor.

[0019] In the above-mentioned automatic handrail, a status indicator light is further connected to the housing. Through the status indicator light, the situation of the automatic handrail can be understood in a timely manner, avoiding using it when the handrail connection is unstable and improving safety.

[0020] In the above-mentioned automatic handrail, both the connection port and the suction cup are circular, and the diameter of the suction cup is larger than that of the connection port. Both being circular and the diameter of the suction cup being larger than that of the connection port enables circumferential closure when the housing presses the suction cup against the wall, resulting in a better sealing effect.

[0021] Compared with the prior art, the present automatic handrail has the following advantages:

[0022] 1. The drive motor cooperates with the nut-screw structure to actively drive the movement of the suction cup, making the movement direction of the suction cup relatively stable, preventing air leakage of the suction cup caused by the inclination of the entire housing. At the same time, the end faces at both ends of the housing tightly press on the suction cup, improving the sealing between the suction cup and the wall and ensuring the stability of the suction cup adsorption.

[0023] 2. The present automatic handrail judges the adsorption situation of the suction cup by detecting the air pressure between the suction cup and the wall through the air pressure sensor, and can automatically operate the drive motor after the air pressure rises to reduce the air pressure again, so that the automatic handrail can be stably fixed on the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic cross-sectional structure diagram of the first embodiment of the present automatic handrail in the default state.

[0025] Figure 2 is a schematic cross-sectional structure diagram of the first embodiment of the present automatic handrail in the adsorption state.

[0026] Figure 3 It is a schematic cross-sectional structure diagram of the second embodiment of the automatic handrail of the present invention.

[0027] In the figure, 1 is the outer shell; 1a is the connection port; 2 is the suction cup; 2a is the main body; 2b is the rod part; 2c is the through hole; 3 is the driving motor; 4 is the trigger; 5 is the air pressure sensor; 6 is the first screw; 7 is the first nut; 8 is the second nut; 9 is the first connecting rod; 10 is the second connecting rod; 11 is the travel switch; 12 is the second screw; 13 is the third nut; 14 is the boosting spring; 15 is the power supply unit; 16 is the wall surface. Specific implementation manner

[0028] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0029] Embodiment 1

[0030] As Figure 1 shown, the automatic handrail of the present invention includes an outer shell 1 in the shape of a U-shaped handle, a power supply unit 15, a driving motor 3, and a trigger 4. The outer shell 1 has a cavity inside. The driving motor 3 and the power supply unit 15 are both fixed in the cavity. The trigger 4 is connected to the outer shell 1. Circular connection ports 1a are provided at both end faces of the outer shell 1. Suction cups 2 are provided at both connection ports 1a and part of the suction cups 2 extends out of the connection ports 1a.

[0031] Among them, the driving motor 3 is connected to the suction cup 2 through a transmission mechanism connected inside the outer shell 1, and the driving motor 3 can drive the suction cup 2 to move into the connection port 1a after the trigger 4 is triggered, and make the end faces at both ends of the outer shell 1 respectively press tightly on the corresponding suction cups 2. In this embodiment, the trigger 4 includes a button; the driving motor 3 is connected to a control circuit fixed inside the outer shell 1; a status indicator light is also connected to the outer shell 1.

[0032] Since the specific structures at both ends of the outer shell 1 are exactly the same, the following takes the structure at one of the ends as an example for description.

[0033] Specifically, the suction cup 2 includes a disk-shaped main body 2a and a long rod-shaped rod part 2b. The diameter of the main body 2a is larger than the diameter of the connection port 1a. The outer side of the main body 2a is concave. The rod part 2b is fixed on the inner side of the main body 2a along the axial direction of the main body 2a. The end face of the rod part 2b connected to the main body 2a has a recessed mounting hole, and a pressure sensor 5 is fixed in the mounting hole. The pressure sensor 5 is connected to the control circuit. A through hole 2c is penetrated at the position corresponding to the pressure sensor 5 on the main body 2a.

[0034] A boosting spring 14 is further arranged inside the outer shell 1. The boosting spring 14 is sleeved outside the rod portion 2b. One end abuts against the inside of the outer shell 1, and the other end acts on the rod portion 2b of the suction cup 2. Under the elastic force of the boosting spring 14, the suction cup 2 has a tendency to move towards the inside of the outer shell 1.

[0035] The transmission mechanism includes a first screw 6, a first nut 7, a second nut 8, a first connecting rod 9 and a second connecting rod 10. The first screw 6 is rotatably connected inside the outer shell 1. The driving motor 3 can drive the first screw 6 to rotate circumferentially through the cooperation of a gear set. The thread directions on the outer sides of both ends of the first screw 6 are opposite. The first nut 7 and the second nut 8 are respectively threadedly connected to the outer sides of both ends of the first screw 6. One end of the first connecting rod 9 is hinged to the first nut 7, and the other end is hinged to the end of the rod portion 2b of the suction cup 2 away from the main body 2a. One end of the second connecting rod 10 is hinged to the second nut 8, and the other end is hinged to the end of the rod portion 2b of the suction cup 2 away from the main body 2a. In this embodiment, there are lugs on both sides of the end of the rod portion 2b away from the main body 2a, and the first connecting rod 9 and the second connecting rod 10 are respectively hinged to the two lugs. A travel switch 11 is also fixed at a position corresponding to the first nut 7 inside the outer shell 1.

[0036] When this automatic handrail is in use, a user holds the middle of the outer shell 1 with one hand and presses the two connection ports 1a on the same side of the outer shell 1 against the wall surface 16. The main body 2a of the suction cup 2 partially extending out of the connection port 1a is flattened, and the air between the suction cup 2 and the wall surface 16 is squeezed out, reducing the internal air pressure.

[0037] The user can press a button on the outer shell 1, and the control circuit controls the driving motor 3 to work. The driving motor 3 drives the first screw 6 to rotate circumferentially through the gear set, drives the first nut 7 and the second nut 8 to move towards each other through the threads with opposite directions on the outer sides of both ends of the first screw 6, and can push the suction cup 2 to move towards the inside of the outer shell 1 through the first connecting rod 9 and the second connecting rod 10. Since the suction cup 2 has been adsorbed on the wall surface 16 and cannot move greatly, the work of the driving motor 3 will cause the suction cup 2 to move and deform slightly towards the outer shell 1 direction, increasing the space between the suction cup 2 and the wall surface 16, further reducing the air pressure, increasing the pressure difference inside and outside the suction cup 2, and making the suction cup 2 adsorb more firmly. At the same time, the outer shell 1 moves towards the suction cup 2 under the drive of the driving motor 3, and the end face of the outer shell 1 at the connection port 1a presses the suction cup 2 tightly against the wall surface 16, making the edge of the suction cup 2 fit more closely with the wall surface 16 and not leak air, and it is not easy to fall off even after long-term use.

[0038] After adsorption and fixation, in order to cope with the situation where the suction cup 2 leaks air due to the unevenness of the wall surface 16 or other factors, a pressure sensor 5 is added to this automatic handrail to detect the air pressure between the suction cup 2 and the wall surface 16. When the air pressure rises due to air leakage, the drive motor 3 can automatically operate to further pull the suction cup 2 to deform slightly to increase the space between the suction cup 2 and the wall surface 16, reduce the air pressure, and ensure that the automatic handrail can be stably fixed on the wall surface 16 without falling off. In this embodiment, the specific air pressure setting value can be obtained according to actual experiments. For example, this air pressure value can be a value in the range of 0 - 50 kPa, preferably 20 kPa.

[0039] Embodiment 2

[0040] The solution of this embodiment is roughly the same as that of Embodiment 1, except that: the transmission mechanism includes a second screw 12 rotatably connected in the housing 1 and a third nut 13 threadedly connected to the outside of the second screw 12. The setting direction of the second screw 12 is consistent with the moving direction of the suction cup 2. The drive motor 3 can drive the second screw 12 to rotate circumferentially, and the third nut 13 is fixed to the rod portion 2b of the suction cup 2. When the drive motor 3 operates, it drives the second screw 12 to rotate circumferentially through the gear set. Since the third nut 13 is fixed to the suction cup 2, the third nut 13 will not rotate circumferentially but move along the axial direction of the second screw 12, thereby driving the suction cup 2 to move along the axial direction of the second screw 12. And the trigger 4 can also include a position sensor fixed on the housing 1, which can be used to detect whether the user's hand is blocked and can also be used to detect the situation close to the wall surface 16, and both can control the start of the drive motor 3.

[0041] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An automatic handrail, comprising a handle-shaped housing (1), both ends of the housing (1) are provided with connection ports (1a), and suction cups (2) are provided at both connection ports (1a), and the suction cups (2) partially extend out of the connection ports (1a), characterized in that, The automatic handrail further includes a drive motor (3) and a trigger (4). The drive motor (3) is connected within the housing (1) and is connected to the suction cup (2) through a transmission mechanism. The drive motor (3) can drive the suction cup (2) to move into the connection port (1a) after the trigger (4) is triggered, and make the end faces at both ends of the housing (1) respectively press tightly on the corresponding suction cups (2). The suction cup (2) includes a disc-shaped main body (2a) and a rod-shaped rod portion (2b).

2. The automatic handrail according to claim 1, characterized in that, A pressure sensor (5) capable of detecting the air pressure on the side of the suction cup (2) far from the housing (1) is connected to the suction cup (2). The drive motor (3) can drive the suction cup (2) to move into the housing (1) when the air pressure value detected by the pressure sensor (5) is higher than the set value.

3. The automatic handrail according to claim 2, characterized in that, The rod portion (2b) is fixed on the main body (2a) along the axial direction of the main body (2a). The pressure sensor (5) is fixed between the rod portion (2b) and the main body (2a). A through hole (2c) is formed through the main body (2a) at a position corresponding to the pressure sensor (5).

4. The automatic handrail according to claim 1 or 2 or 3, characterized in that, The transmission mechanism includes a first screw (6), a first nut (7), a second nut (8), a first connecting rod (9) and a second connecting rod (10). The first screw (6) is rotatably connected within the housing (1). The drive motor (3) can drive the first screw (6) to rotate circumferentially. The thread directions on the outer sides of both ends of the first screw (6) are opposite. The first nut (7) and the second nut (8) are respectively threadedly connected to the outer sides of both ends of the first screw (6). One end of the first connecting rod (9) is hinged to the first nut (7), and the other end is hinged to the suction cup (2). One end of the second connecting rod (10) is hinged to the second nut (8), and the other end is hinged to the suction cup (2).

5. The automatic handrail according to claim 1 or 2 or 3, characterized in that, A travel switch (11) is also fixed within the housing (1) at the position of the transmission mechanism.

6. The automatic handrail according to claim 1 or 2 or 3, characterized in that, The transmission mechanism includes a second screw (12) rotatably connected within the housing (1) and a third nut (13) threadedly connected to the outer side of the second screw (12). The arrangement direction of the second screw (12) is consistent with the moving direction of the suction cup (2). The drive motor (3) can drive the second screw (12) to rotate circumferentially. The third nut (13) is fixed to the suction cup (2).

7. The automatic handrail according to claim 1 or 2 or 3, characterized in that, The trigger (4) includes a button connected to the housing (1).

8. The automatic handrail according to claim 1 or 2 or 3, characterized in that, The trigger (4) includes a position sensor fixed to the housing (1).

9. The automatic handrail according to claim 1 or 2 or 3, characterized in that, A boosting spring (14) is further arranged within the housing (1). One end of the boosting spring (14) abuts against the housing (1), and the other end acts on the suction cup (2). The suction cup (2) has a tendency to move into the housing (1) under the elastic force of the boosting spring (14).

10. The automatic handrail according to claim 1 or 2 or 3, characterized in that, A power supply unit (15) capable of supplying power to the drive motor (3) is also connected to the housing (1).

11. The automatic handrail according to claim 1 or 2 or 3, characterized in that, A status indicator light is also connected to the housing (1).

12. The automatic handrail according to claim 1 or 2 or 3, characterized in that, Both the connection port (1a) and the suction cup (2) are circular, and the diameter of the suction cup (2) is larger than the diameter of the connection port (1a).

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