Self-balancing elevator car

Abstract

The present invention discloses a self-balancing elevator car, which belongs to the technical field of elevators. The present invention realizes real-time monitoring and dynamic adjustment of the weight distribution inside the elevator by arranging a balancing component inside the car body, including a central counterweight block and a plurality of balancing units distributed in a ring array, as well as an electromagnet and a pressure sensor on the inner chassis that cooperate with the balancing component. When the balance of the elevator decreases due to uneven distribution of passengers, the controller will control the electromagnet to start according to the signal of the pressure sensor, and drive the balancing unit to move to a specified position, thereby realizing balanced adjustment of the elevator weight. This not only improves the balance and stability of the elevator, but also reduces the burden on the elevator mechanical structure due to shaking and tilting, and extends the service life of the elevator.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and more particularly to a self-balancing elevator car. Background Art

[0002] With the acceleration of urbanization, elevators, as an indispensable means of vertical transportation in modern buildings, are attracting increasing attention for their safety, comfort, and energy efficiency. Traditional elevator car design often focuses on load capacity and operating efficiency, with less attention paid to internal balance, the passenger experience, and safety warning mechanisms during operation. Especially in high-rise buildings, uneven passenger distribution can cause elevator car sway and tilt during operation, which not only affects passenger comfort but also poses a potential threat to elevator safety.

[0003] First, elevator balance issues caused by uneven passenger distribution are a common phenomenon. During operation, passengers often choose to stand at different locations within the elevator car according to their needs. This can lead to uneven weight distribution in the car, causing it to sway and tilt. This sway not only affects the passenger experience but also places additional strain on the elevator's mechanical structure, accelerating wear and aging.

[0004] Secondly, the safety warning mechanism during elevator operation is still imperfect. Traditional elevator safety systems rely primarily on sensors and controllers to monitor the elevator's operating status in real time. Once a malfunction or abnormality occurs, the system immediately initiates protective measures, such as stopping operation and issuing an alarm. However, this post-event approach cannot effectively prevent elevator accidents, especially when it comes to elevator balance issues caused by uneven passenger distribution, as there is a lack of effective warning and intervention mechanisms.

[0005] Therefore, in response to the above-mentioned technical problems, it is necessary to provide a self-balancing elevator car. Summary of the Invention

[0006] The object of the present invention is to provide a self-balancing elevator car to solve the above-mentioned problems.

[0007] In order to achieve the above-mentioned purpose, the technical solution provided by one embodiment of the present invention is as follows:

[0008] A self-balancing elevator car includes a car body, a balancing assembly and an inner chassis. The base portion of the car body is provided with a balancing cavity, the balancing assembly is installed in the balancing cavity, the balancing assembly includes a central counterweight block fixedly installed at the center position of the balancing cavity, a plurality of balancing units distributed in a circular array are slidably installed on the outside of the central counterweight block, a plurality of electromagnets corresponding to the balancing units are fixedly installed on the side walls of the balancing cavity, the inner chassis is fixedly installed above the inner base of the car body, and the inner chassis includes a plurality of evenly distributed chassis units.

[0009] As a further improvement of the present invention, the chassis unit includes a docking frame, the inner end of the docking frame is fixedly connected to the core plate, the upper end of the core plate is fixedly installed with a panel, a pressure sensor is installed between the panel and the core plate, the pressure sensor signal is connected to the controller, the controller is electrically connected to the electromagnet, the pressure sensor is used to detect the pressure on the panel in the corresponding area, and send the pressure signal to the controller, and then the controller calculates the balance mode of the balance component according to the pressure value and position.

[0010] As a further improvement of the present invention, an extrusion groove is provided at the lower end of the core plate, and a matching pressure block is slidably installed at the opening of the extrusion groove. An elastic liquid sac is fixedly connected between the pressure block and the top wall of the extrusion groove, and the elastic liquid sac is filled with a color-developing liquid. An annular color-developing cavity is provided inside the docking frame, and the elastic liquid sac is connected to the annular color-developing cavity through a plurality of evenly distributed infusion tubes. When the balancing unit in the balancing assembly is driven by the electromagnet and moves to the designated area, it will squeeze the pressure block on the chassis unit in the area, forcing it to push the color-developing liquid in the elastic liquid sac through the infusion tube into the annular color-developing cavity for color development, thereby prompting and guiding other users to stand in this area to balance the pressure. After balancing by the user's weight, the electromagnet can be turned off to save energy.

[0011] As a further improvement of the present invention, the balancing unit includes a balancing block, a slider, a magnet block and an extrusion block. The slider is fixedly connected to the lower end of the balancing block. A plurality of slide grooves matching the extrusion block are provided at the bottom of the balancing cavity, and the slider is slidably installed in the slide groove. The magnet block is inlaid and installed on the balancing block. The extrusion block is fixedly connected to the upper end of the balancing block. The magnet block can be moved by being attracted or repelled by the electromagnet. The slider is used to limit the moving trajectory of the balancing block so that it can accurately balance the weight. The extrusion block is used to cooperate with the pressure block to extrude it.

[0012] As a further improvement of the present invention, the ends of the extrusion block and the pressure block that are close to each other are both cambered structures, and a spring is fixedly connected between the slider and the side wall of the slide groove.

[0013] As a further improvement of the present invention, a pair of symmetrically distributed annular color-control sheets are fixedly installed inside the annular color-developing cavity. The cross-sectional shape of the pair of annular color-control sheets is trumpet-shaped, and the distance between them gradually decreases from top to bottom. The docking frame is made of transparent material, and the annular color-control sheets are made of non-transparent material. The pair of annular color-control sheets with a trumpet-shaped structure can make the color-developing liquid present a gradually thickening "color-developing ring" as the liquid level rises after entering, and the prompt effect is more obvious. Even if part of the color-developing liquid enters the annular color-developing cavity due to the shaking of the elevator, the narrow space below the pair of annular color-control sheets can block a certain field of view, and it is less likely to cause false prompts.

[0014] As a further improvement of the present invention, a plurality of evenly distributed reflective floats are provided between a pair of the annular color-control sheets, and an elastic pull rope is fixedly connected between the reflective floats and the annular color-control sheets. Under normal conditions, the reflective floats are located at the lower openings of the pair of annular color-control sheets. When the color-developing liquid enters, the reflective floats can rise with the liquid level by relying on the buoyancy effect, and cooperate with the original lights in the car body to achieve a reflective effect, thereby further improving the prompting effect for users. When the elevator shakes, the reflective floats will shake synchronously at the liquid surface, and then cooperate with the lights to achieve a flashing effect, which can remind users that the elevator is shaking, and the greater the elevator shakes, the more obvious the flashing effect of the reflective floats.

[0015] As a further improvement of the present invention, the reflective float includes a core ball, a floating block and a reflective film. The floating block is fixedly connected to the upper end of the core ball and together constitute a spherical structure. The reflective film is coated on the outer surface of the core ball. The reflective film reflects the light and has a special flashing effect when combined with the color-developing liquid. The floating block can ensure that the reflective float as a whole can rise with the liquid level of the color-developing liquid, and the core ball can stabilize the posture of the reflective float to prevent it from moving due to very slight shaking under normal conditions, so that the flashing effect causes discomfort without prompting the user.

[0016] As a further improvement of the present invention, the diameter of the reflective float is greater than the minimum distance between a pair of annular color control sheets, and the float block is made of a lightweight buoyancy material.

[0017] As a further improvement of the present invention, the color-developing liquid adopts a colored translucent oil liquid, and the surface of the docking frame and the annular color control film are coated with a nano-oleophobic coating. The colored translucent oil liquid not only has good light transmittance, but can also cooperate with the reflective film to achieve a good reflective and flashing effect. At the same time, its fluidity is relatively high and it is not easy to adhere to the docking frame and the annular color control film to cause residual color development.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] (1) The present invention realizes real-time monitoring and dynamic adjustment of the weight distribution inside the elevator by arranging a balancing assembly inside the car body, including a central counterweight block and a plurality of balancing units distributed in a ring array, as well as an electromagnet and a pressure sensor on the inner chassis that cooperate with the balancing assembly. When the balance of the elevator decreases due to uneven distribution of passengers, the controller will control the electromagnet to start according to the signal of the pressure sensor and drive the balancing unit to move to the specified position, thereby realizing the balance adjustment of the elevator weight. This not only improves the balance and stability of the elevator, but also reduces the burden on the elevator mechanical structure due to shaking and tilting, thereby extending the service life of the elevator.

[0020] (2) The present invention arranges a plurality of evenly distributed chassis units on the inner chassis. Each chassis unit is equipped with a pressure sensor and a color display device, which can monitor the distribution of passengers in real time and give prompts. When a passenger stands on a chassis unit, the corresponding color display device will light up, guiding other passengers to stand in that area to balance the weight. This not only improves the passengers' riding experience, but also enhances the safety of the elevator. At the same time, when the elevator shakes or tilts, the flashing effect of the color display device and the reflective float will promptly remind passengers to pay attention to safety, avoiding accidents caused by elevator shaking.

[0021] (3) The present invention monitors the operating status of the elevator in real time by installing sensors and monitoring equipment, and sets up safety warning devices such as reflective floats. When the elevator experiences abnormal conditions such as shaking or tilting, these devices will promptly issue alarms and give prompts, allowing passengers to quickly take countermeasures. At the same time, these warning information can also be transmitted to elevator maintenance personnel through the network so that they can discover and handle elevator failures in a timely manner, thereby improving the safety and reliability of the elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the balancing component part of the present invention;

[0024] Figure 3 A cross-sectional view of the balancing component of the present invention;

[0025] Figure 4 Schematic diagram of the explosion of the chassis unit of the present invention;

[0026] Figure 5 is a cross-sectional view of the chassis unit of the present invention;

[0027] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at A in the middle;

[0028] Figure 7It is a cross-sectional view of the reflective float of the present invention;

[0029] Figure 8 Schematic diagram of the change of the "color ring" before and after tilting of the present invention.

[0030] Description of the numbers in the figure:

[0031] 1. Car body; 2. Chassis unit; 201. Docking frame; 202. Panel; 203. Pressure sensor; 204. Core plate; 205. Pressure block; 206. Infusion tube; 207. Elastic sac; 3. Center counterweight; 4. Balancing unit; 401. Balancing block; 402. Slider; 403. Magnet block; 404. Extrusion block; 5. Electromagnet; 6. Spring; 7. Ring color control sheet; 8. Reflective float; 801. Core ball; 802. Floating block; 803. Reflective film; 9. Elastic pull rope. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] The first implementation method:

[0034] See also Figure 1-8 A self-balancing elevator car includes a car body 1, a balancing assembly and an inner chassis. A balancing cavity is opened at the base of the car body 1, and the balancing assembly is installed in the balancing cavity. The balancing assembly includes a central counterweight block 3 fixedly installed at the center of the balancing cavity, and a plurality of balancing units 4 distributed in a circular array are slidably installed on the outer side of the central counterweight block 3. A plurality of electromagnets 5 corresponding to the balancing units 4 are fixedly installed on the side wall of the balancing cavity. The inner chassis is fixedly installed above the inner base of the car body 1, and the inner chassis includes a plurality of evenly distributed chassis units 2.

[0035] Since the present invention directly modifies the solid base portion of the existing car, the balancing assembly does not cause a significant increase in weight and has little impact on the load capacity of the original car.

[0036] The chassis unit 2 includes a docking frame 201, the inner end of the docking frame 201 is fixedly connected to a core plate 204, the upper end of the core plate 204 is fixedly installed with a panel 202, and a pressure sensor 203 is installed between the panel 202 and the core plate 204. The pressure sensor 203 signal is connected to the controller, and the controller is electrically connected to the electromagnet 5. The pressure sensor 203 is used to detect the pressure on the corresponding area panel 202 and send the pressure signal to the controller, and then the controller calculates the balance mode of the balance component according to the pressure value and position.

[0037] The position of each pressure sensor 203 should be input in advance to facilitate data processing by the controller. Simply put, when a user stands on a chassis unit 2 and the chassis unit 2 is not in the central area covered by the central counterweight block 3, the weight distribution of the car body 1 will be uneven and the balance will be reduced. The controller will control the corresponding electromagnet 5 to start. The electromagnet 5 corresponds to the central symmetrical area of ​​the chassis unit 2 in the standing area about the center point of the central counterweight block 3. The electromagnet 5 in this area is started to adsorb the corresponding balancing unit 4 and move it to the bottom of the specified chassis unit 2, thereby balancing the user standing on the other side of this line, which is similar to the balancing action of a seesaw. Depending on the calculation method of the controller, the balancing accuracy and effect will also vary. However, after moving the balancing unit 4 to the corresponding area, in theory, the balance of the car body 1 can be improved to avoid excessive weight on one side of the car body 1 affecting the balanced operation of the elevator.

[0038] The following is an example of a balancing algorithm for a controller:

[0039] 1. Initialization:

[0040] Read the position information of each pressure sensor.

[0041] The initial balanced state of the car is the central area covered by the central counterweight 3.

[0042] 2. Read pressure data:

[0043] Get the current pressure reading from each pressure sensor.

[0044] The chassis unit 2 on which the user is standing is identified (ie, the sensor with a pressure reading greater than a certain threshold).

[0045] 3. Calculate the imbalance:

[0046] For each chassis unit 2 on which a user stands, the unbalanced moment relative to the central counterweight 3 is calculated.

[0047] Sum up all the unbalanced moments to get the current total unbalance of the car.

[0048] 4. Determine the balance strategy:

[0049] According to the total unbalance, the number and position of the balancing units 4 that need to be moved are calculated.

[0050] The magnitude and direction of the adsorption force of each electromagnet 5 are determined to drive the balancing unit 4 to move to a specified position.

[0051] 5. Perform balancing actions:

[0052] Send a control signal to the electromagnet 5 to start the adsorption or repulsion action.

[0053] Monitor the movement of the balancing units 4 to ensure they reach the designated positions.

[0054] 6. Update balance status:

[0055] According to the new position of the balancing unit 4, the balance state of the car is updated.

[0056] If necessary, steps 2-5 are repeated until the car reaches equilibrium or a certain limit on the number of iterations is reached.

[0057] It is worth noting that a timer can be set to control the delayed start of the electromagnet 5, that is, the pressure sensor 203 continuously detects a continuous pressure signal to determine that the user is actually standing in the area, and then the controller starts the pressure sensor 203 to trigger the balancing action, thereby reducing the energy consumption problem caused by the frequent triggering of the balancing action by the instantaneous pressure signal detected when the user enters and exits the elevator or when the car body 1 moves frequently.

[0058] An extrusion groove is provided at the lower end of the core plate 204, and a matching pressure block 205 is slidably installed at the opening of the extrusion groove. An elastic liquid sac 207 is fixedly connected between the pressure block 205 and the top wall of the extrusion groove. The elastic liquid sac 207 is filled with a color-developing liquid. An annular color-developing cavity is provided inside the docking frame 201, and the elastic liquid sac 207 is connected to the annular color-developing cavity through a plurality of evenly distributed infusion tubes 206. When the balancing unit 4 in the balancing assembly is driven by the electromagnet 5 and moves to the designated area, it will squeeze the pressure block 205 on the chassis unit 2 in the area, forcing it to push the color-developing liquid in the elastic liquid sac 207 through the infusion tube 206 into the annular color-developing cavity for color development, thereby prompting and guiding other users to stand in this area to balance the pressure. After balancing by the user's weight, the electromagnet 5 can be turned off to save energy.

[0059] The balancing unit 4 includes a balancing block 401, a slider 402, a magnet block 403 and an extrusion block 404. The slider 402 is fixedly connected to the lower end of the balancing block 401. A plurality of slide grooves matching the extrusion block 404 are provided at the bottom of the balancing cavity, and the slider 402 is slidably installed in the slide groove. The magnet block 403 is embedded in the balancing block 401. The extrusion block 404 is fixedly connected to the upper end of the balancing block 401. The magnet block 403 can be moved by being attracted or repelled by the electromagnet 5. The slider 402 is used to limit the moving trajectory of the balancing block 401 so that it can accurately balance the weight. The extrusion block 404 is used to cooperate with the pressure block 205 to extrude it.

[0060] The ends of the extrusion block 404 and the pressure block 205 that are close to each other are both cambered structures, and a spring 6 is fixedly connected between the slider 402 and the side wall of the slide groove.

[0061] A pair of symmetrically distributed annular color-control sheets 7 are fixedly installed inside the annular color-developing cavity. The cross-sectional shape of the pair of annular color-control sheets 7 is trumpet-shaped, and the distance between them gradually decreases from top to bottom. The docking frame 201 is made of transparent material, such as high-strength glass, and the annular color-control sheets 7 are made of non-transparent material, such as opaque plastic. The pair of annular color-control sheets 7 with a trumpet-shaped structure can make the color-developing liquid present a gradually thickening "color-developing ring" as the liquid level rises after entering, and the prompt effect is more obvious. Even if part of the color-developing liquid enters the annular color-developing cavity due to the shaking of the elevator, the narrow space below the pair of annular color-control sheets 7 can block a certain field of view, making it less likely to cause false prompts.

[0062] A plurality of evenly distributed reflective floats 8 are provided between a pair of annular color-control sheets 7. An elastic pull rope 9 is fixedly connected between the reflective float 8 and the annular color-control sheet 7. Under normal conditions, the reflective float 8 is located at the lower opening of the pair of annular color-control sheets 7. When the color-developing liquid enters, it can rely on the buoyancy effect to rise with the liquid level, and cooperate with the original lights in the car body 1 to achieve a reflective effect, further improving the prompting effect for users, and when the elevator shakes, the reflective float 8 will shake synchronously at the liquid surface, and then cooperate with the light to achieve a flashing effect, which can remind users that the elevator is shaking, and the greater the elevator shakes, the more obvious the flashing effect of the reflective float 8.

[0063] The reflective float 8 includes a core ball 801, a float block 802 and a reflective film 803. The float block 802 is fixedly connected to the upper end of the core ball 801 and together they constitute a spherical structure. The reflective film 803 is covered on the outer surface of the core ball 801. The reflective film 803 reflects the light and has a special flashing effect when combined with the color-developing liquid. The float block 802 can ensure that the reflective float 8 as a whole can rise with the liquid level of the color-developing liquid, while the core ball 801 can stabilize the posture of the reflective float 8 to prevent it from moving due to very slight shaking under normal conditions, so that the flashing effect causes discomfort without prompting the user.

[0064] The diameter of the reflective float 8 is greater than the minimum distance between a pair of annular color control sheets 7 . The float block 802 is made of a light buoyancy material with a density lower than that of the color developing liquid, such as a foam material.

[0065] The color-developing liquid is a colored translucent oil-like liquid, and the surfaces of the docking frame 201 and the annular color-control film 7 are coated with a nano-oleophobic coating. The colored translucent oil-like liquid not only has good light transmittance, but can also cooperate with the reflective film 803 to achieve a good reflective and flashing effect. At the same time, its fluidity is relatively high and it is not easy to adhere to the docking frame 201 and the annular color-control film 7 to cause residual color development.

[0066] Working principle:

[0067] Under normal conditions, the car body 1 is in a balanced state with relatively even weight distribution. When a user enters the car body 1 and does not stand in the central area covered by the central counterweight 3, please refer to Figure 8 When the user stands at a corner on one side, the weight of this area will increase, affecting the overall balance of the car body 1. At this time, the pressure sensor 203 on the chassis unit 2 in the corresponding area detects a continuous pressure signal and sends it to the controller, which then controls the electromagnet 5 to start adsorbing the corresponding balancing unit 4, moving it to the central symmetrical area of ​​the user's standing area, thereby balancing the user's weight to a certain extent about the center point, avoiding all the weight being concentrated in one area, and improving the balance of the car body 1. Although the center counterweight block 3 area has some weight loss due to the movement of the balancing unit 4, since it is close to the center area of ​​the car body 1, the impact of the weight loss on the balance is much lower than that of the outer area.

[0068] Secondly, when the balancing unit 4 moves, the magnet block 403 will squeeze the pressure block 205 in the passing area when reaching the specified position, thereby forcing it to push the color-developing liquid in the elastic liquid capsule 207 into the docking frame 201 to form a color-developing ring. If it passes through multiple chassis units 2 on the way, then the multiple chassis units 2 will be colored in turn until the last chassis unit 2 reached remains in a colored state, presenting a guiding path for the standing user, and the chassis unit 2 that finally remains in a colored state can prompt subsequent users to stand in that area to balance, then the electromagnet 5 can be closed to allow the balancing unit 4 to reset under the elastic force of the spring 6, reducing the energy consumption of the electromagnet 5 that is always on.

[0069] In addition, when the car body 1 shakes, the reflective float 8 on the inside of the docking frame 201 will flash due to its reflective properties to prompt the user. The more obvious the flashing state is, the more violent the elevator shakes. It can prompt some shakes that are not strongly felt. The user can provide feedback to the elevator maintenance personnel, thereby timely discovering some hidden dangers. Even if the user stands in the center area, even if the color-developing liquid has not entered the corresponding chassis unit 2, the reflective float 8 itself has a certain flashing effect due to its own reflective properties, but the prompt effect will be worse than that of the color-developing liquid. When the car body 1 tilts, the liquid level of the color-developing liquid entering the docking frame 201 changes relatively, and the "color-developing ring" in some areas becomes thinner or even disappears, and the "color-developing ring" in some other areas becomes thicker, indicating that the elevator is in a tilted state. The change in the liquid level of the color-developing liquid and the trumpet-shaped structure design of a pair of annular color control plates 7 can amplify the prompt effect of slight tilts. The greater the tilt, the more obvious the change in the "color-developing ring".

[0070] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0071] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A self-balancing elevator car, characterized in that: include: A car body (1), wherein a balancing cavity is provided at the base portion of the car body (1); A balancing assembly is installed in the balancing cavity, the balancing assembly comprising a central counterweight (3) fixedly installed at the center of the balancing cavity, a plurality of balancing units (4) distributed in an annular array being slidably installed outside the central counterweight (3), and a plurality of electromagnets (5) corresponding to the balancing units (4) being fixedly installed on the side wall of the balancing cavity; An inner chassis, fixedly mounted above the inner base of the car body (1), the inner chassis comprising a plurality of evenly distributed chassis units (2); The chassis unit (2) comprises a docking frame (201), the inner end of the docking frame (201) is fixedly connected to a core plate (204), the upper end of the core plate (204) is fixedly mounted with a panel (202), a pressure sensor (203) is mounted between the panel (202) and the core plate (204), the pressure sensor (203) is signal-connected to a controller, and the controller is electrically connected to the electromagnet (5); An extrusion groove is provided at the lower end of the core plate (204), a matching pressure block (205) is slidably mounted at the opening of the extrusion groove, an elastic liquid sac (207) is fixedly connected between the pressure block (205) and the top wall of the extrusion groove, the elastic liquid sac (207) is filled with a color-developing liquid, an annular color-developing cavity is provided inside the docking frame (201), and the elastic liquid sac (207) is connected to the annular color-developing cavity through a plurality of evenly distributed infusion tubes (206); The balancing unit (4) includes a balancing block (401), a slider (402), a magnet block (403) and an extrusion block (404), wherein the slider (402) is fixedly connected to the lower end of the balancing block (401), a plurality of slide grooves matching the extrusion block (404) are provided at the bottom of the balancing cavity, and the slider (402) is slidably installed in the slide grooves, the magnet block (403) is embedded in the balancing block (401), and the extrusion block (404) is fixedly connected to the upper end of the balancing block (401); A pair of symmetrically distributed annular color control sheets (7) are fixedly installed inside the annular color display cavity. The cross-section of the pair of annular color control sheets (7) is trumpet-shaped, and the distance between them gradually decreases from top to bottom. The docking frame (201) is made of a transparent material, and the annular color control sheets (7) are made of a non-transparent material. A plurality of evenly distributed reflective floats (8) are provided between a pair of the annular color control sheets (7), and an elastic drawstring (9) is fixedly connected between the reflective floats (8) and the annular color control sheets (7).

2. A self-balancing elevator car according to claim 1, characterized in that: The ends of the extrusion block (404) and the pressure block (205) that are close to each other are both cambered structures, and a spring (6) is fixedly connected between the slider (402) and the side wall of the slide groove.

3. The self-balancing elevator car according to claim 1, characterized in that: The reflective floating ball (8) comprises a core ball (801), a floating block (802) and a reflective film (803), wherein the floating block (802) is fixedly connected to the upper end of the core ball (801) and together they form a spherical structure, and the reflective film (803) is coated on the outer surface of the core ball (801).

4. A self-balancing elevator car according to claim 3, characterized in that: The diameter of the reflective float (8) is greater than the minimum distance between a pair of annular color control sheets (7), and the float block (802) is made of a lightweight buoyancy material.

5. The self-balancing elevator car according to claim 1, characterized in that: The color-developing liquid is a colored, light-transmitting oil-type liquid, and the surfaces of the docking frame (201) and the annular color-controlling sheet (7) are both coated with a nano-oleophobic coating.

Images