An elevator door opening and closing anti-pinch mechanism
Patent Information
- Application Number
- CN202522170296.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-14
- Publication Date
- 2026-09-04
- Estimated Expiration
- 2035-10-14
AI Technical Summary
[0003]传统的防夹机构，在使用过程中，一方面，横向栅栏的检测范围受限于发射器与接收器的安装高度，对于贴近地面的低矮障碍物易出现检测盲区；另一方面，红外光路呈横向分布，当障碍物以水平角度进入门体缝隙时，可能因未阻断任何一组竖向光路而导致防夹功能失效
[0013]The beneficial effect is that, compared with the shortcomings of traditional anti-pinch mechanisms in use, this application achieves full-range obstacle monitoring within the door's closing path by using a vertical infrared detection surface formed by an infrared transmitting slide rail and an infrared receiving slide rail, combined with a traditional horizontal detection surface. This effectively eliminates the blind spot for detecting low-lying obstacles caused by the installation height limitation of traditional horizontal fences. Through the vertically distributed infrared signal transceiver holes and corresponding infrared diodes and photodiodes, a vertical infrared detection surface covering the door gap is formed, enabling accurate detection of obstacles entering the door gap at a horizontal angle. This avoids the anti-pinch function failure problem that may occur with traditional horizontal infrared light paths, significantly improving detection sensitivity. Furthermore, the circuit compartment provides... The circuit board and infrared diodes provide a stable installation space, while a sealing plate prevents dust and moisture from entering. A transparent resin cover protects the infrared diodes without affecting signal transmission, ensuring the stability of infrared detection. Meanwhile, an external power supply connected via a power connector, along with a battery pack, serves as a backup power source, enabling the anti-pinch mechanism to continue operating in special circumstances such as power outages, further enhancing its reliability. The magnetic block at the bottom of the slide rail, in conjunction with the magnetic induction sensor on the door panel slide strip, accurately detects the door panel position and provides precise data for the anti-pinch response. This allows the elevator door to react quickly when encountering obstacles, stopping and reversing its opening, effectively preventing accidents such as passenger injury or property damage, and greatly improving elevator safety.
Smart Images
Figure CN224716197U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of anti-pinch mechanism technology, and in particular to an anti-pinch mechanism for elevator door opening and closing. Background Technology
[0002] In modern building transportation systems, elevators, as core equipment for vertical transportation, directly impact passenger safety and travel experience. Among these safety features, the anti-pinch function during door opening and closing is crucial. Failure of the anti-pinch mechanism can easily lead to accidents such as passenger injuries and property damage. Most mainstream elevator anti-pinch devices employ a design with multiple sets of infrared transmitters and receivers linearly installed on both sides of the elevator door, forming multiple horizontal infrared barriers to detect obstacles. With the surge in the number of high-rise buildings and the increasing frequency of elevator use, the market demand for more reliable and sensitive anti-pinch technology is becoming increasingly urgent.
[0003] Traditional anti-pinch mechanisms have several drawbacks during use. Firstly, the detection range of the horizontal fence is limited by the installation height of the transmitter and receiver, which can easily lead to blind spots for low obstacles close to the ground. Secondly, the infrared light path is distributed horizontally, and when an obstacle enters the gap of the door at a horizontal angle, the anti-pinch function may fail because no set of vertical light paths is blocked.
[0004] Therefore, to address the shortcomings of traditional anti-pinch mechanisms in use, an elevator door anti-pinch mechanism can be designed. This mechanism integrates infrared transmitters and receivers into the top and bottom slide rails of the elevator door, respectively. The evenly distributed transmitter and receiver holes on the slide rail surface form a vertically covering infrared detection surface. Combined with commonly available horizontally covering monitoring surfaces, this enables full-range monitoring of obstacles within the door's closing path, thus facilitating the solution of the aforementioned problems. Summary of the Invention
[0005] To overcome the shortcomings of traditional anti-pinch mechanisms, such as the detection range of the horizontal fence being limited by the installation height of the transmitter and receiver, the presence of blind spots for low obstacles close to the ground, and the horizontal distribution of the infrared light path, which may cause the anti-pinch function to fail when an obstacle enters the door gap at a horizontal angle because no set of vertical light paths is blocked, this utility model provides an anti-pinch mechanism for elevator door opening and closing.
[0006] The technical solution is as follows: An elevator door anti-pinch mechanism includes an infrared transmitting slide rail, a first door panel, an infrared receiving slide rail, and a second door panel; an infrared receiving slide rail is provided above the infrared transmitting slide rail to receive the signal emitted by the infrared transmitting slide rail, and a first door panel and a second door panel are provided between the infrared transmitting slide rail and the infrared receiving slide rail. The first door panel and the second door panel are symmetrically arranged along the infrared transmitting slide rail and the infrared receiving slide rail. A transceiver groove is provided at the center of the surface of the infrared transmitting slide rail, and multiple sets of transceiver holes are evenly provided on the surface of the transceiver groove.
[0007] Furthermore, a circuit compartment is provided at the bottom of the infrared transmitting slide rail, and a circuit board is provided inside the circuit compartment. Multiple sets of infrared diodes corresponding to the transceiver holes are evenly distributed on the surface of the circuit board, and a transparent resin cover is attached to the surface of the transceiver slot.
[0008] Furthermore, sliding grooves are provided on both sides of the transceiver slot, and multiple sets of magnetic blocks corresponding to infrared diodes are evenly arranged at the bottom of one set of sliding grooves.
[0009] Furthermore, a power supply port is provided at the center of one side wall of the circuit compartment, and a power supply connector is provided inside the power supply port. A battery holder is provided at one edge of the circuit compartment, and a battery pack is provided inside the battery holder. The power supply connector, the battery pack, and the circuit board are connected in sequence.
[0010] Furthermore, the infrared receiving slide rail is configured the same as the infrared transmitting slide rail, but the infrared diode inside the infrared receiving slide rail is replaced with a photodiode.
[0011] Furthermore, the bottom of the first door panel is provided with a contact plate, and the bottom of the contact plate is provided with two sets of corresponding slide bars. One set of slide bars has a sensing hole on the side near the second panel, and the inside of the sensing hole is provided with a magnetic induction sensor corresponding to the magnetic block.
[0012] Furthermore, a sealing plate groove is provided at the bottom edge of the line compartment, and a sealing plate is embedded inside the sealing plate groove.
[0013] The beneficial effect is that, compared with the shortcomings of traditional anti-pinch mechanisms in use, this application achieves full-range obstacle monitoring within the door's closing path by using a vertical infrared detection surface formed by an infrared transmitting slide rail and an infrared receiving slide rail, combined with a traditional horizontal detection surface. This effectively eliminates the blind spot for detecting low-lying obstacles caused by the installation height limitation of traditional horizontal fences. Through the vertically distributed infrared signal transceiver holes and corresponding infrared diodes and photodiodes, a vertical infrared detection surface covering the door gap is formed, enabling accurate detection of obstacles entering the door gap at a horizontal angle. This avoids the anti-pinch function failure problem that may occur with traditional horizontal infrared light paths, significantly improving detection sensitivity. Furthermore, the circuit compartment provides... The circuit board and infrared diodes provide a stable installation space, while a sealing plate prevents dust and moisture from entering. A transparent resin cover protects the infrared diodes without affecting signal transmission, ensuring the stability of infrared detection. Meanwhile, an external power supply connected via a power connector, along with a battery pack, serves as a backup power source, enabling the anti-pinch mechanism to continue operating in special circumstances such as power outages, further enhancing its reliability. The magnetic block at the bottom of the slide rail, in conjunction with the magnetic induction sensor on the door panel slide strip, accurately detects the door panel position and provides precise data for the anti-pinch response. This allows the elevator door to react quickly when encountering obstacles, stopping and reversing its opening, effectively preventing accidents such as passenger injury or property damage, and greatly improving elevator safety. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the elevator door anti-pinch mechanism of this utility model. Figure 2 This is a three-dimensional structural diagram of the infrared emitting slide rail of this utility model; Figure 3 This is a three-dimensional structural diagram of the infrared emitting slide rail of this utility model from another angle. Figure 4 This is a three-dimensional structural diagram of the first door panel of this utility model.
[0015] Explanation of reference numerals in the attached drawings: 1. Infrared transmitting slide rail; 101. Transceiver slot; 102. Slide rail; 103. Transparent resin cover plate; 104. Transceiver hole; 105. Infrared diode; 106. Magnetic block; 107. Circuit compartment; 108. Circuit board; 109. Power supply port; 110. Power supply connector; 111. Battery holder; 112. Battery pack; 113. Sealing plate slot; 114. Sealing plate; 2. First door panel; 201. Contact plate; 202. Slide bar; 203. Sensing hole; 204. Magnetic induction sensor; 3. Infrared receiving slide rail; 4. Second door panel. Detailed Implementation
[0016] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Example
[0017] like Figures 1-4 As shown, an elevator door anti-pinch mechanism includes an infrared transmitting slide rail 1, a first door panel 2, an infrared receiving slide rail 3, and a second door panel 4. An infrared receiving slide rail 3 is provided above the infrared transmitting slide rail 1 to receive the signal emitted by the infrared transmitting slide rail 1. The first door panel 2 and the second door panel 4 are provided between the infrared transmitting slide rail 1 and the infrared receiving slide rail 3. The first door panel 2 and the second door panel 4 are symmetrically arranged between the infrared transmitting slide rail 1 and the infrared receiving slide rail 3. A transceiver groove 101 is opened at the center of the surface of the infrared transmitting slide rail 1. Multiple sets of transceiver holes 104 are evenly opened on the surface of the transceiver groove 101.
[0018] The bottom of the infrared transmitting slide rail 1 has a circuit compartment 107, inside which is a circuit board 108. The surface of the circuit board 108 is evenly provided with multiple sets of infrared diodes 105 corresponding to the transceiver holes 104. A transparent resin cover plate 103 is attached to the surface of the transceiver slot 101. The circuit compartment 107 provides a stable installation space for the circuit board 108 and the infrared diodes 105, avoiding interference from the external environment to the electronic components. The transparent resin cover plate 103 can protect the infrared diodes 105 in the transceiver holes 104, while not affecting the transmission and reception of infrared signals, thus ensuring the stability of infrared detection.
[0019] Both sides of the receiving slot 101 are provided with sliding grooves 102. At the bottom of one set of sliding grooves 102, multiple sets of magnetic blocks 106 corresponding to infrared diodes 105 are evenly provided. The sliding grooves 102 provide guidance for the sliding of the door panel, ensuring that the door panel runs smoothly. The magnetic blocks 106 cooperate with the magnetic induction sensor 204 on the subsequent door panel to accurately detect the position of the door panel, providing accurate positional basis for the anti-pinch reaction.
[0020] A power supply port 109 is provided at the center of one side wall of the circuit compartment 107. A power supply connector 110 is provided inside the power supply port 109. A battery holder 111 is provided at one edge of the circuit compartment 107. A battery pack 112 is provided inside the battery holder 111. The power supply connector 110, the battery pack 112 and the circuit board 108 are connected in sequence. External power can be easily connected through the power supply port 109 and the power supply connector 110. The battery pack 112 serves as a backup power source and can ensure that the anti-pinch mechanism continues to work when the power is off, thereby improving the reliability and safety of the mechanism.
[0021] The infrared receiving slide rail 3 has the same configuration as the infrared emitting slide rail 1. The infrared diode 105 in the infrared receiving slide rail 3 is replaced with a photodiode. The photodiode can accurately receive the infrared signal emitted by the infrared diode 105, ensuring the effective formation of the infrared detection surface.
[0022] The bottom of the first door panel 2 is provided with a contact plate 201. The bottom of the contact plate 201 is provided with two sets of slide bars 202 corresponding to the slide groove 102. One set of slide bars 202 has a sensing hole 203 on the side near the second panel. The sensing hole 203 is provided with a magnetic induction sensor 204 (magnetic induction sensor 204 model) corresponding to the magnetic block 106. The slide bar 202 cooperates with the slide groove 102 to ensure smooth sliding of the door panel. The magnetic induction sensor 204 cooperates with the magnetic block 106 to monitor the movement status of the door panel in real time and trigger the anti-pinch action in time.
[0023] A sealing plate groove 113 is provided at the bottom edge of the circuit compartment 107. A sealing plate 114 is embedded inside the sealing plate groove 113. The sealing plate 114 can effectively seal the circuit compartment 107, preventing dust, moisture and other substances from entering the circuit compartment 107 and damaging electronic components, thus extending the service life of components such as the circuit board 108.
[0024] During elevator installation, the infrared transmitting slide rail 1 and the infrared receiving slide rail 3 are fixed to the corresponding positions at the top and bottom of the elevator car door, respectively, ensuring that they are vertically aligned. Then, the slide bars 202 of the first door panel 2 and the second door panel 4 are embedded into the slide grooves 102 of the infrared transmitting slide rail 1 and the infrared receiving slide rail 3, completing the assembly of the door panel and the slide rail. Next, an external power supply is connected through the power supply port 109 of the wiring compartment 107, and a battery pack 112 is installed in the battery holder 111 as a backup power supply to ensure that the mechanism can still work normally in special circumstances such as power failure. After installation, the anti-pinch mechanism will automatically start when the elevator is running normally, without additional operation, and will monitor the obstacle situation during the opening and closing of the elevator door in real time.
[0025] Its working principle is as follows: the infrared emitting slide rail 1 and the infrared receiving slide rail 3 form a vertical infrared detection surface, which cooperates with the traditional horizontal monitoring surface. Multiple sets of infrared diodes 105 are evenly arranged on the circuit board 108 inside the infrared emitting slide rail 1. These infrared diodes 105 emit infrared signals through the transceiver holes 104 in the transceiver slots 101 on the slide rail surface. Since the infrared receiving slide rail 3 has the same structure as the infrared emitting slide rail 1, except that the infrared diodes 105 are replaced by photodiodes, the photodiodes can accurately receive the corresponding infrared signals, thereby forming a complete vertical infrared detection surface within the closed path of the elevator door.
[0026] When the elevator door opens or closes, the first door panel 2 and the second door panel 4 slide along the slide rail 102. At this time, the magnetic block 106 at the bottom of the slide rail 102 and the magnetic induction sensor 204 on the door panel slide strip 202 cooperate to monitor the position and movement status of the door panel in real time. When an obstacle enters the closing path of the elevator door, whether the obstacle is a low object close to the ground or an object that enters the gap of the door at a horizontal angle, it will block part of the infrared signal in the vertical infrared detection surface. After the photodiode does not receive the corresponding infrared signal, it will transmit the information to the circuit board 108. The circuit board 108 reacts quickly and controls the elevator door to stop closing and open in the reverse direction to realize the anti-pinch function. The transparent resin cover 103 protects the infrared diode 105 in the transceiver hole 104 without affecting the transmission of infrared signals, further ensuring the stability of the mechanism.
[0027] Its beneficial effects are significant. This application achieves full-range obstacle monitoring within the closed path of the door by using a vertical infrared detection surface formed by the infrared transmitting slide rail 1 and the infrared receiving slide rail 3, in conjunction with a traditional horizontal detection surface. This effectively eliminates the blind spot for detecting low-lying obstacles caused by the installation height limitation of traditional horizontal fences. The vertically distributed infrared signal transceiver holes 104, in conjunction with the corresponding infrared diodes 105 and photodiodes, form a vertical infrared detection surface that fully covers the door gap, enabling accurate detection of obstacles entering the door gap at a horizontal angle. This avoids the potential failure of the anti-pinch function in traditional horizontal infrared light paths and significantly improves detection sensitivity. The circuit compartment 107 provides a stable mounting space for the circuit board 108 and the infrared diodes 105. In the meantime, a sealing plate 114 prevents dust and moisture from entering, and a transparent resin cover 103 protects the infrared diode 105 without affecting signal transmission, ensuring the stability of infrared detection. Simultaneously, an external power supply connected via the power connector 110, along with a battery pack 112 as a backup power source, enables the anti-pinch mechanism to continue operating in special circumstances such as power outages, further enhancing the mechanism's reliability. The magnetic block 106 at the bottom of the slide rail 102, in conjunction with the magnetic induction sensor 204 on the door panel slide strip 202, accurately detects the door panel position and provides accurate information for the anti-pinch response. This allows the elevator door to react quickly when encountering obstacles, stopping and reversing its opening, effectively preventing accidents such as passenger injury or damage to property, and greatly improving the safety of elevator use.
Claims
1. An elevator door anti-pinch mechanism, comprising an infrared emitting slide rail (1); characterized in that, It also includes a first door panel (2), an infrared receiving slide rail (3) and a second door panel (4); an infrared receiving slide rail (3) is provided above the infrared transmitting slide rail (1) to receive the signal transmitted by the infrared transmitting slide rail (1), and a first door panel (2) and a second door panel (4) are provided between the infrared transmitting slide rail (1) and the infrared receiving slide rail (3). The first door panel (2) and the second door panel (4) are symmetrically arranged between the infrared transmitting slide rail (1) and the infrared receiving slide rail (3). A transceiver groove (101) is opened at the center of the surface of the infrared transmitting slide rail (1), and multiple transceiver holes (104) are evenly opened on the surface of the transceiver groove (101).
2. The elevator door anti-pinch mechanism according to claim 1, characterized in that, The bottom of the infrared transmitting slide rail (1) is provided with a circuit compartment (107), and the inside of the circuit compartment (107) is provided with a circuit board (108). Multiple sets of infrared diodes (105) corresponding to the transceiver holes (104) are evenly provided on the surface of the circuit board (108), and a transparent resin cover plate (103) is attached to the surface of the transceiver slot (101).
3. The elevator door anti-pinch mechanism according to claim 2, characterized in that, Both sides of the transceiver slot (101) are provided with sliding grooves (102), and the bottom of one set of sliding grooves (102) is provided with multiple sets of magnetic blocks (106) corresponding to infrared diodes (105).
4. The elevator door anti-pinch mechanism according to claim 3, characterized in that, A power supply port (109) is provided in the center of one side wall of the circuit compartment (107). A power supply connector (110) is provided inside the power supply port (109). A battery holder (111) is provided at one edge of the circuit compartment (107). A battery pack (112) is provided inside the battery holder (111). The power supply connector (110), the battery pack (112) and the circuit board (108) are connected in sequence.
5. The elevator door anti-pinch mechanism according to claim 4, characterized in that, The infrared receiving slide rail (3) is configured the same as the infrared transmitting slide rail (1), but the infrared diode (105) inside the infrared receiving slide rail (3) is replaced with a photodiode.
6. The elevator door anti-pinch mechanism according to claim 3, characterized in that, The bottom of the first door panel (2) is provided with a contact plate (201), and the bottom of the contact plate (201) is provided with two sets of sliders (202) corresponding to the slide grooves (102). One set of sliders (202) has a sensing hole (203) on the side near the second panel. The inside of the sensing hole (203) is provided with a magnetic induction sensor (204) corresponding to the magnetic block (106).
7. The elevator door anti-pinch mechanism according to claim 5, characterized in that, A sealing plate groove (113) is provided at the bottom edge of the line compartment (107), and a sealing plate (114) is embedded inside the sealing plate groove (113).