Rail transit platform door anti-pinch device

Abstract

The utility model is suitable for platform door safety technical field provides rail transit platform door anti -pinch hand device, including platform door frame and install in its inside anti -pinch door body, install in the inside edge of anti -pinch door body's flexible buffer assembly, the flexible buffer assembly includes the buffer strip that can take place deformation, the buffer strip inside is equipped with the cavity and is provided with with the cavity communication's micro -pump, the infrared array sensor for detecting the obstacle of inlaying in the edge inside of anti -pinch door body is provided. The rail transit platform door anti -pinch hand device provided by the scheme, through the innovative combination of infrared array sensor and inflatable flexible buffer assembly, provides a kind of monitoring dead angle, responds quickly and can actively carry out physical buffering platform door anti -pinch hand device, it effectively overcomes the defects of limited monitoring range and insufficient buffer protection in the prior art, significantly improves the safety performance of rail transit platform door.

Description

Technical Field

[0001] This utility model belongs to the field of platform door safety technology, and in particular relates to an anti-pinch device for rail transit platform doors. Background Technology

[0002] In urban rail transit systems, platform screen doors are crucial facilities for ensuring passenger safety and improving operational efficiency, and the effectiveness and reliability of their anti-pinch function are paramount. In recent years, with the continuous increase in rail transit passenger volume, platform screen door accidents have occurred frequently, posing a serious threat to passenger safety and negatively impacting the safety and stability of rail transit operations.

[0003] Chinese patent document CN201162452Y discloses an anti-pinch device for platform screen doors in urban rail transit stations, including a sliding door and an obstacle detection system. The key feature is that the sliding door has a safety stop extending towards the track on the track-side side. This invention has a simple structure. By adding a safety stop, the obstacle detection function of the original platform screen door is extended towards the track, while simultaneously narrowing the gap between the sliding door and the train. This prevents passengers from standing in the gap between the train door and the platform screen door, thus preventing and mitigating the danger of being pinched due to the gap between the train and the platform screen door, reliably ensuring safe train operation.

[0004] The aforementioned existing technologies use a single through-beam infrared sensor or contact sensor strip, which has a limited monitoring range and detection blind spots. Moreover, most of them can only trigger the door to stop or rebound, lacking a mechanism for active buffer protection at the moment of hand pinching. They cannot effectively alleviate the impact force and local pressure, and may still cause injury to the hands of passengers, especially children. Utility Model Content

[0005] This utility model provides an anti-pinch device for rail transit platform doors, which aims to solve the problem that the current commonly used single through-beam infrared sensors or contact sensing strips have limited monitoring range, have blind spots, and can mostly only trigger the door to stop or rebound, lacking a mechanism to actively buffer and protect the hand at the moment of pinching. This cannot effectively alleviate the impact force and local pressure, and may still cause injury to the hands of passengers, especially children.

[0006] This utility model is implemented as follows: a platform screen door anti-pinch device for rail transit includes a platform screen door frame and an anti-pinch door body installed inside it; a flexible buffer assembly installed on the inner edge of the anti-pinch door body, the flexible buffer assembly including a deformable buffer strip, the buffer strip having a cavity inside and a miniature air pump communicating with the cavity; an infrared array sensor embedded inside the edge of the anti-pinch door body for detecting obstacles, the infrared array sensor being signal-connected to the miniature air pump to trigger the miniature air pump to operate when an obstacle is detected.

[0007] Preferably, the infrared array sensors are multiple and evenly distributed in a matrix inside the edge of the anti-pinch door.

[0008] Preferably, the infrared array sensor adopts an 8×4 pixel layout, with each pixel having a detection angle of 5°, covering a three-dimensional space of 10mm-50mm around the edge of the door.

[0009] Preferably, the buffer strip is a silicone buffer strip.

[0010] Preferably, after the silicone buffer strip is inflated by the micro air pump, its thickness expands from the original thickness to more than 8 mm.

[0011] Preferably, the flexible buffer assembly further includes a rigid support strip that fits against the inner side of the buffer strip.

[0012] Preferably, the flexible buffer assembly is detachably connected to the slots on the anti-pinch door body via engaging members at both ends.

[0013] Preferably, the drive mechanism is used to drive the anti-pinch door body to move.

[0014] Preferably, the fixed frame beam is installed on the upper part of the platform door frame. The front surface of the fixed frame beam is also equipped with a camera probe for monitoring the environment. A motor assembly is installed inside the fixed frame beam. The output end of the motor assembly is connected to a drive wheel through a rotating shaft. The surface of the drive wheel is connected to a driven wheel through a belt. A mounting plate is also fixed to the surface of the belt. The lower end of the mounting plate is fixedly connected to the upper edge of the anti-pinch door body through a locking block.

[0015] Compared with related technologies, the anti-pinch hand device for rail transit platform doors provided by this utility model has the following beneficial effects:

[0016] By embedding a matrix of infrared array sensors within the edge of the anti-pinch door, using an 8×4 pixel layout with each pixel having a detection angle of 5°, the system can cover a three-dimensional space of 10mm-50mm around the door edge, resulting in a wider and more comprehensive infrared detection range for the human body. The door edge is wrapped with a removable silicone buffer strip, which conceals a honeycomb hollow structure. When a risk of pinching is detected, a miniature air pump inside the buffer strip instantly inflates, expanding the strip's thickness from 5mm to 8mm. This physical deformation increases the contact area and reduces local pressure, providing excellent anti-pinch protection. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram of the internal installation structure of this utility model;

[0019] Figure 3 This is the front view of the present invention;

[0020] Figure 4 This is a schematic diagram of the flexible buffer component structure of this utility model.

[0021] In the diagram: 1. Platform door frame; 2. Anti-pinch door body; 3. Fixed frame beam; 4. Camera probe; 5. Drive wheel; 6. Motor assembly; 7. Mounting plate; 8. Locking block; 9. Belt; 10. Driven wheel; 11. Infrared array sensor; 12. Flexible buffer assembly; 13. Miniature air pump; 14. Inflation port; 15. Clamping component; 16. Rigid support bar; 17. Silicone buffer bar. Detailed Implementation

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] Example 1

[0025] A preferred embodiment of the anti-pinch hand device for rail transit platform doors provided by this utility model is, for example... Figures 1 to 4 As shown: a rail transit platform door anti-pinch device, including a platform door frame 1 and an anti-pinch door body 2 installed inside it; a flexible buffer assembly 12 installed on the inner edge of the anti-pinch door body 2, the flexible buffer assembly 12 including a deformable buffer strip, the buffer strip having a cavity inside and a miniature air pump 13 communicating with the cavity; an infrared array sensor 11 embedded inside the edge of the anti-pinch door body 2 for detecting obstacles, the infrared array sensor 11 being signal-connected to the miniature air pump 13 to trigger the miniature air pump 13 to work when an obstacle is detected.

[0026] It should be noted that some existing anti-pinch devices for rail transit platform doors still have certain shortcomings in actual use. In the comparison documents, they usually use a single through-beam infrared sensor or contact sensor strip, which has a limited monitoring range and blind spots. Moreover, most of them can only trigger the door to stop or rebound, lacking a mechanism to actively buffer and protect the hand at the moment of pinching. They cannot effectively alleviate the impact force and local pressure, and may still cause injury to the hands of passengers, especially children.

[0027] In this embodiment, by embedding the infrared array sensor 11 into the edge of the door and linking it with the micro air pump 13, an intelligent anti-pinch system of "active detection-instantaneous buffer" is formed. Its core innovation lies in the fact that it can not only control the movement of the door when a risk is detected, but also actively create a safe buffer zone through the physical deformation of the buffer strip, thus achieving a safety level improvement from "no pinching" to "pinch-free".

[0028] In a further preferred embodiment of this utility model, there are multiple infrared array sensors 11 that are evenly distributed in a matrix inside the edge of the anti-pinch door body 2.

[0029] In this embodiment, this layout completely eliminates the detection blind spots of traditional single sensors, and can cover the entire closed edge of the door without omission. No matter what angle or position a hand is extended into the danger zone, it can be effectively detected, greatly improving the reliability of the system.

[0030] In a further preferred embodiment of this utility model, the infrared array sensor 11 adopts an 8×4 pixel layout, with each pixel having a detection angle of 5°, covering a three-dimensional space of 10mm-50mm around the edge of the door.

[0031] In this embodiment, the precise parameter design ensures that the monitoring range can not only be close to the door surface, but also extend to a certain distance in three-dimensional space, realizing accurate judgment of the two states of "about to be clamped" and "already clamped", providing an accurate data basis and valuable reaction time for triggering subsequent buffer actions.

[0032] In a further preferred embodiment of this utility model, the buffer strip is a silicone buffer strip 17.

[0033] In this embodiment, the food-grade silicone material has good softness, elasticity and biocompatibility, and can provide a gentle touch when in contact with the human body. It can also provide basic cushioning protection even when it is not inflated, ensuring the safety of use.

[0034] In a further preferred embodiment of this utility model, after the silicone buffer strip 17 is inflated by the micro air pump 13, its thickness expands from the original thickness to more than 8mm.

[0035] In this embodiment, instantaneous inflation is key to reducing pressure. According to the pressure formula P = F / S, with a constant clamping force F, increasing the contact area S can effectively reduce pressure P. Although the absolute value of the expansion from 5mm to 8mm is not significant, the contact area can increase exponentially through the deformation of the fit with the hand, thereby significantly reducing pain and the risk of pinching.

[0036] In a further preferred embodiment of the present invention, the flexible buffer assembly 12 further includes a rigid support strip 16 that is fitted to the inner side of the buffer strip.

[0037] In this embodiment, the rigid support strip 16 provides back support when the silicone buffer strip 17 is inflated, preventing it from deforming irregularly inward, ensuring that the expansion force is concentrated on the external dangerous area, and at the same time ensuring the structural stability and durability of the entire flexible buffer assembly 12.

[0038] In a further preferred embodiment of the present invention, the flexible buffer assembly 12 is detachably connected to the slots on the anti-pinch door body 2 via the locking parts 15 at both ends.

[0039] In this embodiment, the snap-fit ​​connection structure facilitates routine maintenance, cleaning, or replacement. If the buffer strip wears out after prolonged use or the air pump malfunctions, maintenance personnel can quickly replace the component without disassembling the entire door, greatly reducing maintenance costs and time.

[0040] In a further preferred embodiment of this utility model, a drive mechanism is used to drive the anti-pinch door body 2 to move.

[0041] In this embodiment, the anti-pinch device can be adapted to various existing platform door drive mechanisms, demonstrating its good versatility and compatibility.

[0042] In a further preferred embodiment of this utility model, a fixed frame beam 3 is installed on the upper end of the platform door frame 1. A camera probe 4 for monitoring the environment is also installed on the front surface of the fixed frame beam 3. A motor assembly 6 is installed inside the fixed frame beam 3. The output end of the motor assembly 6 is connected to a drive wheel 5 through a rotating shaft. A driven wheel 10 is connected to the surface of the drive wheel 5 through a belt 9. A mounting plate 7 is also fixed to the surface of the belt 9. The lower end of the mounting plate 7 is fixedly connected to the upper edge of the anti-pinch door body 2 through a locking block 8.

[0043] In this embodiment, a specific drive implementation method is demonstrated. The motor assembly 6 achieves smooth opening and closing of the door through belt 9. The camera probe 4 serves as an auxiliary monitoring means, complementing the data from the infrared array sensor 11. It is used to record the scene or to make higher-level security judgments through image recognition, thus forming a multi-dimensional security protection system.

[0044] In summary, by innovatively combining infrared array sensors with inflatable flexible buffer components, a platform door anti-pinch device is provided that offers comprehensive monitoring, rapid response, and proactive physical buffering. It effectively overcomes the shortcomings of existing technologies, such as limited monitoring range and insufficient buffering protection, and significantly improves the safety performance of rail transit platform doors.

[0045] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0046] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0047] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A hand-pinch prevention device for rail transit platform doors, characterized in that, include: Platform door frame (1) and anti-pinch door body (2) installed inside it; A flexible buffer assembly (12) is installed on the inner edge of the anti-pinch door body (2). The flexible buffer assembly (12) includes a deformable buffer strip. The buffer strip has a cavity inside and a miniature air pump (13) communicating with the cavity. An infrared array sensor (11) is embedded inside the edge of the anti-pinch door body (2) for detecting obstacles. The infrared array sensor (11) is signal-connected to the micro air pump (13) to trigger the micro air pump (13) to work when an obstacle is detected.

2. The anti-pinch hand device for rail transit platform doors as described in claim 1, characterized in that, The infrared array sensors (11) are multiple and evenly distributed in a matrix inside the edge of the anti-pinch door body (2).

3. The anti-pinch hand device for rail transit platform doors as described in claim 2, characterized in that, The infrared array sensor (11) adopts an 8×4 pixel layout, with each pixel having a detection angle of 5°, covering a three-dimensional space of 10mm-50mm around the edge of the door.

4. The anti-pinch hand device for rail transit platform doors as described in claim 1, characterized in that, The buffer strip is a silicone buffer strip (17).

5. The anti-pinch hand device for rail transit platform doors as described in claim 4, characterized in that, After the silicone buffer strip (17) is inflated by the micro air pump (13), its thickness expands from the original thickness to more than 8 mm.

6. The anti-pinch hand device for rail transit platform doors as described in claim 1, characterized in that, The flexible buffer assembly (12) also includes a rigid support strip (16) that fits against the inner side of the buffer strip.

7. The anti-pinch hand device for rail transit platform doors as described in claim 1, characterized in that, The flexible buffer assembly (12) is detachably connected to the slots on the anti-pinch door body (2) via the locking parts (15) at both ends.

8. The anti-pinch hand device for rail transit platform doors as described in claim 1, characterized in that, Includes a drive mechanism for driving the anti-pinch door body (2) to move.

9. The anti-pinch hand device for rail transit platform doors as described in claim 8, characterized in that, The drive mechanism includes: a fixed frame beam (3); A fixed frame beam (3) is installed on the upper end of the platform door frame (1). A camera probe (4) for monitoring the environment is also installed on the front surface of the fixed frame beam (3). A motor assembly (6) is installed inside the fixed frame beam (3). The output end of the motor assembly (6) is connected to a drive wheel (5) through a rotating shaft. A driven wheel (10) is connected to the surface of the drive wheel (5) through a belt (9). A mounting plate (7) is also fixed to the surface of the belt (9). The lower end of the mounting plate (7) is fixedly connected to the upper edge of the anti-pinch door body (2) through a locking block (8).

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