A hovering electric window and its hovering control method

Abstract

This invention discloses a hovering electric window and its hovering control method, including a window body with an opening, guide rails disposed on the upper and lower sides of the window, a movable window slidably disposed within the guide rails, a drive component for driving the movable window to move, limiting structures disposed at the front and rear ends of the movable window's movement direction, and a hovering control mechanism for controlling the front / rear final stopping position of the movable window's movement direction. The hovering control mechanism is configured such that when the movable window is at its front / rear final stopping position, the movable window does not contact the limiting structures. This invention achieves high-precision, non-contact detection of the window's extreme positions, effectively avoiding the problems of easy wear, short lifespan, and slow response of traditional mechanical limit switches, thus improving system reliability and service life.

Description

Technical Field

[0001] This invention relates to the field of automotive window technology, and more specifically, to a hovering electric window and its hovering control method. Background Technology

[0002] As a standard feature in modern cars, power windows function by automatically raising and lowering the window glass via a motor. Traditional power window systems typically rely on mechanical limiting structures (such as rigid blocks) to limit the opening and closing limits of the window. However, this design has significant drawbacks: when the window reaches the end of its travel and rigidly collides with the limiting structure, it not only generates noticeable impact noise and vibration, affecting driving comfort, but also easily leads to wear and even damage to the transmission mechanism over long-term use, reducing system reliability.

[0003] Current technology lacks a solution to this problem. Simply using a trigger switch, such as a microswitch as a limit sensor, requires mechanical pressure to be applied to the switch contacts at the window glass or lifting mechanism at extreme positions to trigger the signal. This method suffers from response lag and contact wear. In particular, the trigger position of the microswitch is significantly affected by assembly tolerances, material aging, and repeated impacts, making it difficult to guarantee a consistent stopping position for each window closing action. This can easily lead to hard collisions between the window glass and the window frame, significantly shortening the system's lifespan. On the other hand, relying solely on Hall effect sensors indirectly calculates the window travel by accumulating motor rotations, which easily causes a deviation between the actual motor rotation and the theoretical travel. This deviation accumulates with repeated use, causing the opening or closing limit positions to gradually drift.

[0004] Therefore, there is an urgent need for a hovering electric window and its hovering control method to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a hovering electric window and its hovering control method, overcoming the above-mentioned defects in the prior art.

[0006] The technical solution to achieve the purpose of this invention is: a hovering electric window, including a window body with a window opening, guide rails set on the upper and lower sides of the window, a movable window slidably set in the guide rails, a driving component for driving the movable window to move, a limiting structure set at the front and rear ends of the moving window in the moving direction, and a hovering control mechanism for controlling the front / rear final stop position of the moving window in the moving direction. The hovering control mechanism is configured such that when the moving window is in the front / rear final stop position, the moving window does not contact the limiting structure.

[0007] Furthermore, the hovering control mechanism includes a first trigger switch and a second trigger switch corresponding to the final stopping positions of the moving window before and after the window moves. When the moving window triggers the first trigger switch or the second trigger switch, the first trigger switch or the second trigger switch sends a stop signal to control the drive component to stop operating, thereby causing the moving window to hover.

[0008] Furthermore, the first trigger switch is a photoelectric switch, which is detachably mounted on the front end of the guide rail; the second trigger switch is a Hall element, which is mounted on the travel control board of the drive assembly.

[0009] Furthermore, the drive component is located at the end of the guide rail away from the first trigger switch.

[0010] Furthermore, the drive assembly includes a drive motor, a rotary gear, and a drive flexible shaft; the output end of the drive motor is fixedly connected to the rotary gear, the rotary gear is drivenly connected to one end of the drive flexible shaft, and the other end of the drive flexible shaft is fixedly connected to the movable window.

[0011] Furthermore, the window is also fixed with an arc-shaped guide seat, which is used to guide the movement trajectory of the drive flexible shaft.

[0012] Furthermore, the window of the window body is provided with a sealing strip around the window frame. When the movable window is moving in the closing direction, it passes through the sealing strip and continues to move to the preset closing position and stops.

[0013] The present invention also includes a hovering control method for a hovering electric window, comprising the following steps: S100, a first trigger switch is set on the guide rail of the window at the final stop position corresponding to the closing direction of the moving window, and the first trigger switch is a photoelectric switch; S200, when the moving window is moving in the closing direction, the first trigger switch is used to detect in real time whether the moving window has reached the previous final stop position. If the moving window triggers the first trigger switch, a closing signal is generated and the drive component is controlled to stop running, so that the moving window is suspended at the previous final stop position. S300, a Hall element is provided on the stroke control board of the drive assembly, and the Hall element calculates the total stroke of the moving window from the closed position to the open position based on the number of rotations of the drive motor; S400, when the moving window is moving in the opening direction, the Hall element monitors the movement of the driving component in real time. When the movement reaches the preset opening limit threshold, an opening signal is generated and the driving component is controlled to stop running, so that the moving window is suspended at the final stopping position.

[0014] Furthermore, the first trigger switch is located on the side of the guide rail corresponding to the final stop position of the moving window in the closing direction. When the moving window moves to the previous final stop position, it blocks the light path of the first trigger switch to trigger the closing signal. The Hall element cooperates with the magnetic ring on the drive motor shaft to measure the number of rotations or rotation angle of the motor by detecting the change in the magnetic field generated by the rotation of the magnetic ring.

[0015] Furthermore, in step S400, the cumulative motion of the Hall element is reset to zero each time a closing signal triggered by the photoelectric switch is received.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects: (1) By using a photoelectric switch at the closing stroke end and setting a Hall element at the opening stroke end or drive mechanism, the present invention achieves high-precision, non-contact detection of the limit position of the car window, effectively avoiding the problems of easy wear, short life and slow response of traditional mechanical limit switches, and improving the system reliability and service life.

[0017] (2) This invention effectively solves the problem of accumulated error caused by long-term operation of traditional pure Hall effect or encoder solutions by setting a photoelectric switch as an absolute position reference point at the closing stroke end and triggering the switch to generate a precise closing signal each time the window is closed. The system uses physically reliable photoelectric detection as the "zero point" reference for stroke measurement, ensuring that the starting point of the opening stroke calculation is always accurate, thereby greatly improving the long-term stability and repeatability of limit control.

[0018] (3) The travel calculation module (such as Hall element) of the present invention is only used to monitor the relative motion in the opening direction and automatically clears to zero after receiving the closing signal of the photoelectric switch each time. This avoids complex software calibration algorithms and multi-sensor fusion logic, simplifies the control strategy, reduces system cost and failure rate, and takes into account both the flexibility of the opening limit and the reliability of the closing limit.

[0019] (4) The present invention sets the trigger position of the photoelectric switch at a preset closed position where the window glass has passed through the sealing strip but has not yet contacted the bottom of the window frame, so that the window maintains a small gap with the bottom of the window frame when the limit signal is triggered. This design ensures that the sealing strip is effectively compressed to achieve the waterproof sealing function, and avoids direct impact between the glass and the rigid window frame, reducing mechanical impact and abnormal noise, and extending the life of the lifting mechanism.

[0020] (5) This invention achieves high-precision limit control without sacrificing sealing performance through the synergistic design of photoelectric sensing, magnetic sensing and elastic sealing structure, and maintains long-term operational stability through closed-loop calibration mechanism, which has outstanding practicality, innovation and industrialization value. Attached Figure Description

[0021] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein... Figure 1 This is the front view of the present invention.

[0022] Figure 2 This is a diagram of the internal structure of the driving component.

[0023] 1. Window; 2. Guide rail; 3. Drive assembly; 3-1. Rotary gear; 3-2. Drive flexible shaft; 3-3. Arc-shaped guide seat; 4. Moving window; 5. First trigger switch. Detailed Implementation

[0024] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0025] like Figures 1 to 2 As shown, this embodiment provides a hovering electric window, including a window body 1, a guide rail 2, a movable window 4, a drive assembly 3, a limiting structure, and a hovering control mechanism.

[0026] A rectangular window is provided on the window body 1, and parallel guide rails 2 are fixedly installed on the top and bottom sides of the window. The guide rails 2 are made of aluminum alloy profiles and have internal grooves to guide the sliding window to slide smoothly in the vertical direction. The sliding window 4 is made of glass or transparent composite material, and its top and bottom edges are embedded in the grooves of the guide rails 2.

[0027] The drive assembly 3 is installed at the rear end of the guide rail 2 (i.e., the end away from the closing direction of the window), and includes a drive motor, a rotating gear 3-1, and a drive flexible shaft 3-2. The output shaft of the drive motor is coaxially and fixedly connected to the rotating gear 3-1; the rotating gear 3-1 is connected to one end of the drive flexible shaft 3-2 by meshing or coupling; the other end of the drive flexible shaft 3-2 is fixedly connected to the edge of the movable window 4. To ensure that the drive flexible shaft 3-2 smoothly transmits power in the curved path, an arc-shaped guide seat 3-3 is also fixedly installed inside the window body 1. The arc-shaped guide seat 3-3 is made of wear-resistant engineering plastic, and its inner wall contour is consistent with the expected movement trajectory of the drive flexible shaft 3-2, effectively preventing the flexible shaft from deviating or jamming.

[0028] The hovering control mechanism is used to precisely control the final stopping position of the sliding window in the opening and closing directions, and to ensure that the sliding window does not make physical contact with any mechanical limiting structure when it stops, thereby avoiding impact noise, component wear and sealing failure.

[0029] Specifically, the hovering control mechanism includes a first trigger switch 5 and a second trigger switch. The first trigger switch 5 is a through-beam photoelectric switch, detachably mounted at the front end of the guide rail 2 (i.e., the end area of ​​the window closing direction). When the moving window moves upward to the preset closed position, the light-blocking plate on its upper edge inserts precisely between the transmitter and receiver of the photoelectric switch, blocking the light path. The photoelectric switch then outputs a "closed in place signal" to the vehicle controller or dedicated control module. The controller immediately cuts off the power to the drive motor, causing the moving window to hover at this position. At this time, the moving window has not yet contacted the mechanical limit block at the top of the window frame, maintaining a safety gap of approximately 2–5 mm between them.

[0030] The second trigger switch is a Hall element, integrated into the stroke control board of the drive assembly 3. A magnetic ring is installed at the end of the drive motor shaft, which rotates synchronously with the motor. The Hall element detects the magnetic field pulse signal generated by the magnetic ring per revolution, accumulates the number of motor rotations in real time, and calculates the extension length of the drive flexible shaft 3-2 accordingly, thereby estimating the current position of the movable window. The system is pre-calibrated to determine the total number of pulses required to move from the fully closed position to the fully open position (i.e., the "opening limit threshold"). When the movable window 4 is opening downwards, the Hall element continuously monitors the amount of movement; once the accumulated pulse count reaches the threshold, it is determined that the movable window 4 has reached the final stopping position, and a "fully open signal" is generated to control the drive assembly 3 to stop running, so that the movable window is suspended at the opening limit position, thus avoiding collision with the bottom limiting structure.

[0031] It is worth noting that, to eliminate cumulative errors caused by motor slippage, voltage fluctuations, or long-term use, the system is designed with an automatic calibration mechanism: each time a "closed position signal" triggered by the photoelectric switch is received, the cumulative motion counter of the Hall element is automatically reset to zero. Since the position of the photoelectric switch is fixed and highly accurate, using it as a travel reference point ensures that the starting point of each opening stroke is consistent, significantly improving the repeatability of the opening position.

[0032] In addition, the window edge of window 1 is provided with a surrounding sealing strip. When the sliding window moves in the closing direction, its edge first passes through the sealing strip to form a preliminary seal, and then continues to move upward to the final stop position defined by the photoelectric switch and hovers there. This ensures good airtightness while avoiding permanent deformation of the sealing strip or stress concentration in the glass due to overpressure.

[0033] In summary, this embodiment achieves non-contact, high-precision, and self-calibrating hover control through a dual-mode detection strategy of "photoelectric switch + Hall element". This not only meets the user's demand for a quiet and smooth operating experience, but also extends the service life of the window system, making it particularly suitable for high-end passenger vehicle applications.

[0034] Example 2, a hovering control method for a hovering electric window, includes the following steps: S100, a first trigger switch is set on the guide rail 2 of the window 1 at the final stop position corresponding to the closing direction of the moving window. The first trigger switch 5 is a photoelectric switch. The first trigger switch is set on one side of the guide rail 2 corresponding to the final stop position of the closing direction of the moving window. When the moving window moves to the previous final stop position, it blocks the light path of the first trigger switch to trigger the closing signal. S200, when the moving window is moving in the closing direction, the first trigger switch 5 detects in real time whether the moving window has reached the previous final stop position. If the moving window triggers the first trigger switch 5, a closing signal is generated and the drive component 3 is controlled to stop running, so that the moving window is suspended at the previous final stop position. S300, a Hall element is set on the stroke control board of the drive assembly 3. The Hall element calculates the total stroke of the moving window from the closed position to the open position based on the number of rotations of the drive motor. The Hall element cooperates with the magnetic ring on the drive motor shaft and measures the number of rotations or rotation angle of the motor by detecting the change in the magnetic field generated by the rotation of the magnetic ring. S400: When the moving window moves in the opening direction, the motion of the drive component 3 is monitored in real time by the Hall element. When the motion reaches the preset opening limit threshold, an opening signal is generated and the drive component 3 is controlled to stop running, so that the moving window is suspended at the final stopping position. The cumulative motion of the Hall element is reset to zero each time it receives a closed signal triggered by the photoelectric switch.

[0035] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hovering electric window, characterized in that: The device includes a window (1) with a window opening, guide rails (2) set on the upper and lower sides of the window, a movable window that is slidably set in the guide rails (2), a drive component (3) for driving the movable window to move, a limiting structure set at the front and rear ends of the movable window's movement direction, and a hovering control mechanism for controlling the front / rear final stop position of the movable window's movement direction. The hovering control mechanism is configured such that when the movable window is at the front / rear final stop position, the movable window does not contact the limiting structure.

2. A hovering electric window according to claim 1, characterized in that: The hovering control mechanism includes a first trigger switch and a second trigger switch corresponding to the final stopping positions of the moving window before and after the moving window. When the moving window triggers the first trigger switch or the second trigger switch, the first trigger switch or the second trigger switch sends a stop signal to control the drive component (3) to stop running, so that the moving window hovers.

3. A hovering electric window according to claim 2, characterized in that: The first trigger switch is a photoelectric switch, which is detachably mounted on the front end of the guide rail (2); the second trigger switch is a Hall element, which is mounted on the stroke control board of the drive assembly (3).

4. A hovering electric window according to claim 3, characterized in that: The drive component (3) is located at the end of the guide rail (2) away from the first trigger switch.

5. A hovering electric window according to claim 4, characterized in that: The drive assembly (3) includes a drive motor, a rotating gear (3-1), and a drive flexible shaft (3-2); the output end of the drive motor is fixedly connected to the rotating gear (3-1), the rotating gear (3-1) is connected to one end of the drive flexible shaft (3-2), and the other end of the drive flexible shaft (3-2) is fixedly connected to the movable window.

6. A hovering electric window according to claim 5, characterized in that: The window (1) is also fixed with an arc-shaped guide seat (3-3), which is used to guide the movement trajectory of the drive flexible shaft (3-2).

7. A hovering electric window according to claim 1, characterized in that: The window of the window (1) is provided with a sealing strip around the window frame. When the moving window moves in the closing direction, it passes through the sealing strip and continues to move to the preset closing position and stops.

8. A hovering control method for a hovering electric window, characterized in that, Includes the following steps: S100, a first trigger switch is set on the guide rail (2) of the window (1) at the final stop position corresponding to the closing direction of the moving window, and the first trigger switch is a photoelectric switch; S200, when the moving window is running in the closing direction, the first trigger switch is used to detect in real time whether the moving window has reached the final stop position. If the moving window triggers the first trigger switch, a closing signal is generated and the drive component (3) is controlled to stop running, so that the moving window is suspended at the final stop position. S300, a Hall element is provided on the stroke control board of the drive assembly (3), and the Hall element calculates the total stroke of the moving window from the closed position to the open position based on the number of rotations of the drive motor; S400, when the moving window is moving in the opening direction, the motion of the drive component (3) is monitored in real time by the Hall element. When the motion reaches the preset opening limit threshold, an opening signal is generated and the drive component (3) is controlled to stop running, so that the moving window is suspended at the final stopping position.

9. The hovering control method for a hovering electric window according to claim 8, characterized in that, The first trigger switch is set on the side of the guide rail (2) corresponding to the final stop position of the moving window in the closing direction. When the moving window moves to the final stop position, it blocks the light path of the first trigger switch to trigger the closing signal. The Hall element cooperates with the magnetic ring on the drive motor shaft to measure the number of rotations or rotation angle of the motor by detecting the change in the magnetic field generated by the rotation of the magnetic ring.

10. The hovering control method for a hovering electric window according to claim 8, characterized in that, In step S400, the cumulative motion of the Hall element is cleared to zero each time a closing signal triggered by the photoelectric switch is received.

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