Shielding door limiting device of RFID scanning equipment

Abstract

The utility model belongs to the technical field of information identification, particularly relates to a limiting device for a shielding door of RFID (Radio Frequency Identification) scanning equipment, and provides the following scheme aiming at the problems that the existing limiting device is complicated in structure and high in cost, and the burden of purchasing and using the equipment is increased for some small enterprises or users with strict cost control. A rolling frame is rotatably connected in the support, electromagnetic shielding cloth is fixedly wound on the rolling frame, and a horizontal rotating shaft is fixedly installed in the rolling frame. When an RFID scanning device sends out a door opening / closing instruction, the driving motor rotates through the horizontal rotating shaft and the unwinding shaft to drive the electromagnetic shielding cloth of the shielding door to ascend and descend; when the electromagnetic shielding cloth of the shielding door arrives at a designated position and the positioning triggering device on the indexing adjusting gear triggers the microswitch, the driving motor can be controlled to stop, so that the electromagnetic shielding cloth can be stably limited, and good practicability is achieved.

Description

Technical Field

[0001] This utility model relates to the field of information identification technology, and in particular to a shielding door limit device for an RFID scanning device. Background Technology

[0002] In modern logistics, warehousing, and manufacturing industries, RFID technology is widely used for cargo identification and management. When RFID scanning equipment is operating, it needs to ensure stable signals in the scanning area, free from external interference, while also guaranteeing the accurate opening and closing of the shielding door to achieve efficient and accurate cargo detection and data collection. The limiting device invented in this invention is designed to meet this requirement, aiming to improve the control accuracy and reliability of the shielding door of RFID scanning equipment, thereby enhancing the performance of the entire RFID system. This allows it to operate more stably and efficiently in industrial production and logistics distribution, playing a crucial role in ensuring the accurate acquisition of cargo information and the normal operation of the system. It occupies a key position in related technical fields and provides strong support for achieving intelligent and automated production and management.

[0003] Currently, existing RFID scanning equipment suffers from numerous problems with the limiting mechanism of its shielding doors. Traditional metal door shielding methods, after a period of use, are prone to developing gaps due to metal fatigue, leading to radio frequency signal leakage and misreading. This severely impacts the accuracy and reliability of the RFID scanning equipment. For example, in the management of goods in logistics warehouses, RFID scanning equipment using metal shielding doors may misread product tag information due to signal leakage, causing discrepancies in inventory data and ultimately affecting the efficient operation of the entire logistics and distribution process.

[0004] While common belt-driven roller shutter shielding systems address some of the issues associated with metal doors, their belt travel is prone to deviations, and the motors driving these belts are also susceptible to malfunction. Failures not only affect the normal opening and closing of the shielding door but can also lead to equipment downtime, increasing maintenance and time costs, and reducing production efficiency. For example, on a production line, a malfunction in the belt-driven roller shutter of an RFID scanning device can disrupt the goods inspection process, causing production line halts and resulting in economic losses for the company.

[0005] Furthermore, some existing limit devices are complex in structure and expensive, increasing the burden of equipment procurement and use for small businesses or users with strict cost control. The complex structure also increases the difficulty of equipment maintenance and repair; once a malfunction occurs, it requires professional technicians to spend a considerable amount of time troubleshooting and repairing, further affecting the normal use of the equipment. Therefore, we propose an RFID scanning equipment shielded door limit device to solve the aforementioned problems. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing limit devices, which are complex in structure and high in cost, increasing the burden of equipment procurement and use for some small enterprises or users with strict cost control. Therefore, this invention proposes an RFID scanning equipment shielding door limit device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An RFID scanning equipment shielding door limiting device includes a bracket, a winding frame rotatably connected inside the bracket, an electromagnetic shielding cloth fixedly wound on the winding frame, a horizontal rotating shaft fixedly installed inside the winding frame, one end of the horizontal rotating shaft extending to the outside of the bracket, and a rotating shaft gear fixedly sleeved on the horizontal rotating shaft located on the outside of the bracket. The limiting device also includes:

[0009] The limiting mechanism is installed on one side of the bracket and is engaged with the rotating shaft gear transmission.

[0010] The guiding mechanism works in conjunction with the electromagnetic shielding cloth and is used to guide the electromagnetic shielding cloth.

[0011] In one possible design, the limiting mechanism includes a main support shaft rotatably connected to one side of the bracket, a main indexing gear fixedly sleeved on the main support shaft, the main indexing gear meshing with the rotating shaft gear, a main gear positioning trigger shaft installed at an eccentric position on one side of the main indexing gear, a main limit micro switch fixedly installed on one side of the bracket, the main gear positioning trigger shaft cooperating with the main limit micro switch, and the main limit micro switch electrically connected to the drive motor.

[0012] In one possible design, the limiting mechanism further includes a backup limiting mechanism, which includes a backup support shaft rotatably connected to one side of the bracket. A backup indexing gear is fixedly sleeved on the backup support shaft, and the backup indexing gear meshes with the rotating shaft gear. A backup gear positioning trigger shaft is installed at an eccentric position on one side of the backup indexing gear. A backup limit micro switch is fixedly installed on one side of the bracket. The backup gear positioning trigger shaft cooperates with the backup limit micro switch, and the backup limit micro switch is electrically connected to the drive motor.

[0013] In one possible design, the guiding mechanism includes two guide rails, with both sides of the electromagnetic shielding cloth extending into the two guide rails respectively. A bottom beam is fixedly installed at the bottom of the electromagnetic shielding cloth, with both ends of the bottom beam extending into the two guide rails and slidingly engaging with the inner walls of the two guide rails respectively.

[0014] In one possible design, two first docking covers are symmetrically fixedly installed at the bottom of the bottom beam, each located within a guide rail. A second docking cover is fixedly installed on the bottom inner wall of the guide rail, and the first docking covers are connected to the corresponding second docking covers.

[0015] In one possible design, a first magnet is fixedly installed on the top inner wall of the first docking cover, and a second magnet is fixedly installed on the bottom inner wall of the second docking cover, with the first magnet and the second magnet being movably attracted together.

[0016] In one possible design, two support wheels rotate on one inner wall of the guide rail. The two support wheels are located on both sides of the electromagnetic shielding cloth and are in contact with both sides of the electromagnetic shielding cloth. The support wheels are used to support and limit the electromagnetic shielding cloth.

[0017] In one possible design, a drive motor is fixedly installed on the inner wall of one side of the bracket, and the output shaft of the drive motor is fixedly connected to the other end of the horizontal rotating shaft.

[0018] In this application, during use, the drive motor rotates the horizontal shaft, which in turn rotates the winding frame, enabling the winding or unwinding of the electromagnetic shielding cloth. The rotation of the horizontal shaft also drives the shaft gear, which, through meshing with the main indexing gear, causes the main gear positioning trigger shaft to move in an arc. Furthermore, when the main gear positioning trigger shaft contacts the main limit micro switch, it triggers the main limit micro switch to move, thus issuing a working command to the drive motor to stop it. A backup indexing gear and shaft gear are also included. The wheels remain engaged, allowing the backup gear to be used in conjunction with the backup limit micro switch to stop the drive motor after the electromagnetic shielding cloth has been wound or unwound. This ensures that the electromagnetic shielding cloth is kept in a limited position. When unwinding the electromagnetic shielding cloth, the bottom beam moves downward along the two guide rails until the first mating cover is inserted into the corresponding second mating cover. At this point, the top of the second magnet is located inside the first mating cover and attracts the first magnet, thus limiting the bottom beam and further limiting the electromagnetic shielding cloth to keep it flat.

[0019] Beneficial effects: In this utility model, the RFID scanning equipment shielding door limiting device can drive the horizontal rotating shaft to rotate by starting the drive motor through the limiting mechanism. At this time, it can drive the winding frame to rotate, thereby realizing the winding or unwinding of the electromagnetic shielding cloth. When the horizontal rotating shaft rotates, it can drive the rotating shaft gear to rotate. At this time, under the meshing transmission action with the main indexing gear, it can drive the main gear positioning trigger shaft to perform arc-shaped movement. When the main gear positioning trigger shaft contacts the main limit micro switch, it can trigger the main limit micro switch to move, thereby issuing a working command to the drive motor to stop the drive motor from working.

[0020] In this utility model, the RFID scanning equipment shielding door limiting device can be slidably connected to the bottom beam by two guide rails through the guide mechanism, so that the electromagnetic shielding cloth can be kept flat when it is rolled up or unrolled.

[0021] When the RFID scanning device issues an open / close command, the drive motor rotates via a horizontal rotating shaft and a unwinding shaft, causing the electromagnetic shielding cloth of the shielding door to rise and fall. When the electromagnetic shielding cloth of the shielding door reaches the designated position, the positioning trigger device on the indexing adjustment gear triggers the micro switch, which can control the drive motor to stop. Therefore, it can achieve stable limiting of the electromagnetic shielding cloth and has good practicality. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the shielding door limiting device for an RFID scanning equipment proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the main structure of a shielding door limiting device for an RFID scanning equipment proposed in this utility model;

[0024] Figure 3 This is a three-dimensional schematic diagram of the bracket, drive motor and horizontal rotating shaft connection structure of an RFID scanning equipment shielding door limiting device proposed in this utility model.

[0025] Figure 4 This is a three-dimensional schematic diagram of the connection structure of the indexing gear, rotating shaft gear and backup indexing gear of the shielding door limiting device of the RFID scanning equipment proposed in this utility model.

[0026] Figure 5 A three-dimensional schematic diagram of the connection structure between the two guide rails and the electromagnetic shielding cloth of an RFID scanning equipment shielding door limiting device proposed in this utility model;

[0027] Figure 6This is a three-dimensional schematic diagram of the connection structure of the guide rail and two support wheels of the shielding door limiting device of the RFID scanning equipment proposed in this utility model;

[0028] Figure 7 This is a three-dimensional cross-sectional view of the separation structure of the first and second docking covers of the shielding door limiting device for an RFID scanning equipment proposed in this utility model.

[0029] Figures 8-11 This is a three-dimensional schematic diagram of the main indexing gear structure of the shielding door limit device for an RFID scanning equipment proposed in this utility model.

[0030] In the diagram: 1. Bracket; 2. Winding rack; 21. Horizontal rotating shaft; 22. Rotating shaft gear; 3. Limiting mechanism; 31. Main support shaft; 32. Main indexing gear; 33. Main gear positioning trigger shaft; 34. Main limit micro switch; 4. Backup limiting mechanism; 41. Backup support shaft; 42. Backup indexing gear; 43. Backup gear positioning trigger shaft; 44. Backup limit micro switch; 5. Electromagnetic shielding cloth; 51. Bottom beam; 6. Guide rail; 61. Support wheel; 62. First docking cover; 63. Second docking cover; 64. First magnet; 65. Second magnet; 7. Drive motor. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0032] Example 1: Refer to Figure 1-4 A limiting device is disclosed, the main body of which consists of a bracket 1, inside which a rotating take-up frame 2 is designed for rotational connection. An electromagnetic shielding cloth 5 is tightly wound around the take-up frame 2 to block the RFID scanning area and prevent interference when needed. Inside the take-up frame 2, a horizontal rotating shaft 21 is fixedly installed, one end of which extends to the outside of the bracket 1, and a rotating shaft gear 22 is fixedly fitted at this end for transmission engagement with an external mechanism.

[0033] On one side of the inner wall of the bracket 1, we fixedly installed the drive motor 7, whose output shaft is tightly connected to the other end of the horizontal rotating shaft 21 to ensure stable power transmission.

[0034] Next is the design of the limiting mechanism 3, which is installed on one side of the bracket 1 and engages with the rotating shaft gear 22. The limiting mechanism 3 is mainly composed of a main support shaft 31, on which a main indexing gear 32 is fixedly mounted, precisely meshing with the rotating shaft gear 22. At an eccentric position on one side of the main indexing gear 32, a main gear positioning trigger shaft 33 is fixedly installed. Simultaneously, on one side of the bracket 1, a main limit micro switch 34 is fixedly installed, which engages with the main gear positioning trigger shaft 33 and is electrically connected to the drive motor 7.

[0035] When the drive motor 7 is started, it drives the horizontal rotating shaft 21 to rotate, which in turn drives the winding frame 2 to rotate, thus enabling the winding or unwinding of the electromagnetic shielding cloth 5. During the rotation of the horizontal rotating shaft 21, the rotating shaft gear 22 also rotates, and through meshing with the main indexing gear 32, it drives the main gear positioning trigger shaft 33 to perform arc-shaped motion. When the main gear positioning trigger shaft 33 contacts the main limit micro switch 34, it triggers the main limit micro switch 34, which in turn sends a stop command to the drive motor 7, realizing the limit function.

[0036] To ensure the reliability of the limit switch, we also designed a backup limit mechanism 4. It mainly consists of a backup support shaft 41, on which a backup indexing gear 42 is fixedly mounted. This gear also precisely meshes with the rotating shaft gear 22. At an eccentric position on one side of the backup indexing gear 42, we fixedly installed a backup gear positioning trigger shaft 43. Simultaneously, on one side of the bracket 1, we fixedly installed a backup limit micro switch 44, which cooperates with the backup gear positioning trigger shaft 43 and is electrically connected to the drive motor 7.

[0037] When the electromagnetic shielding cloth 5 is wound up or unwound, the backup gear positioning trigger shaft 43 will contact the backup limit micro switch 44, triggering it to send a stop command to the drive motor 7, ensuring the limit of the electromagnetic shielding cloth 5.

[0038] The working principle of the limit micro switch 34 and the backup limit micro switch 44 is based on the external mechanical force acting on the actuating spring through a transmission element (such as a push pin, button, lever, roller, etc.). When the displacement of the actuating spring reaches the critical point, a momentary action is generated, causing the moving contact at the end of the actuating spring to quickly connect or disconnect with the fixed contact. When the force on the transmission element is removed, the actuating spring generates a reverse action force, and after the reverse stroke of the transmission element reaches the actuating critical point of the spring, the reverse action is completed instantaneously.

[0039] This application can be used in the field of information recognition technology, or in other fields applicable to this application.

[0040] Example 2: Reference Figure 5-7Based on Embodiment 1, an improvement is made to an RFID scanning device shielding door limiting device, which is applied to the field of information identification technology. We have also designed a guiding mechanism to guide the electromagnetic shielding cloth 5. This mechanism mainly consists of two guide rails 6, with both sides of the electromagnetic shielding cloth 5 extending into the two guide rails 6. At the bottom of the electromagnetic shielding cloth 5, we have fixedly installed a bottom beam 51, with both ends of the bottom beam 51 extending into the two guide rails 6 and slidingly engaging with the inner walls of the guide rails 6, ensuring the flatness of the electromagnetic shielding cloth 5 during winding or unwinding.

[0041] At the bottom of the base beam 51, two first mating covers 62 are symmetrically fixedly installed, each located within one of the two guide rails 6. Simultaneously, a second mating cover 63 is fixedly installed on the bottom inner wall of the guide rail 6. A first magnet 64 is fixedly installed on the top inner wall of the first mating cover 62, and a second magnet 65 is fixedly installed on the bottom inner wall of the second mating cover 63. When the electromagnetic shielding cloth 5 is unrolled, the base beam 51 moves downwards along the guide rail 6 until the first mating cover 62 inserts into the second mating cover 63. At this point, the first magnet 64 and the second magnet 65 will attract each other, limiting the position of the base beam 51 and further ensuring the flatness of the electromagnetic shielding cloth 5.

[0042] On one inner wall of the guide rail 6, two support wheels 61 are rotated. They are located on both sides of the electromagnetic shielding cloth 5 and are in close contact with both sides of the electromagnetic shielding cloth 5. The support wheels 61 are used to support and limit the electromagnetic shielding cloth 5, preventing it from being scratched by the guide rail 6 during movement.

[0043] However, as is well known to those skilled in the art, the working principle and wiring method of the drive motor 7 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An RFID scanning device shielding door limiting device, comprising a support (1), a winding frame (2) is rotatably connected in the support (1), an electromagnetic shielding cloth (5) is fixedly wound on the winding frame (2), a horizontal rotating shaft (21) is fixedly installed in the winding frame (2), one end of the horizontal rotating shaft (21) extends to the outside of the support (1), a rotating shaft gear (22) located outside the support (1) is fixedly sleeved on the horizontal rotating shaft (21), characterized in that, The limiting device also includes: Limiting mechanism (3) is installed on one side of bracket (1) and is in transmission cooperation with rotating shaft gear (22); The guiding mechanism works in conjunction with the electromagnetic shielding cloth (5) and is used to guide the electromagnetic shielding cloth (5).

2. The RFED scanning device shielding gate positioner of claim 1, wherein, The limiting mechanism (3) includes a main support shaft (31) rotatably connected to one side of the bracket (1). A main indexing gear (32) is fixedly sleeved on the main support shaft (31). The main indexing gear (32) meshes with the rotating shaft gear (22). A main gear positioning trigger shaft (33) is installed at an eccentric position on one side of the main indexing gear (32). A main limit micro switch (34) is fixedly installed on one side of the bracket (1). The main gear positioning trigger shaft (33) cooperates with the main limit micro switch (34). The main limit micro switch (34) is electrically connected to the drive motor (7).

3. The RFID scanning equipment shielding door limiting device according to claim 2, characterized in that, The limiting mechanism (3) further includes a backup limiting mechanism (4). The backup limiting mechanism (4) includes a backup support shaft (41) rotatably connected to one side of the bracket (1). A backup indexing gear (42) is fixedly sleeved on the backup support shaft (41). The backup indexing gear (42) meshes with the rotating shaft gear (22). A backup gear positioning trigger shaft (43) is installed at an eccentric position on one side of the backup indexing gear (42). A backup limit micro switch (44) is fixedly installed on one side of the bracket (1). The backup gear positioning trigger shaft (43) cooperates with the backup limit micro switch (44). The backup limit micro switch (44) is electrically connected to the drive motor (7).

4. The RFID scanning equipment shielding door limiting device according to claim 1, characterized in that, The guiding mechanism includes two guide rails (6), and the two sides of the electromagnetic shielding cloth (5) extend into the two guide rails (6) respectively. A bottom beam (51) is fixedly installed at the bottom of the electromagnetic shielding cloth (5). The two ends of the bottom beam (51) extend into the two guide rails (6) respectively and slide in cooperation with the inner walls of the two guide rails (6).

5. The RFID scanning equipment shielding door limiting device according to claim 4, characterized in that, The bottom beam (51) has two first docking covers (62) symmetrically fixedly installed at the bottom, which are located in the two guide rails (6) respectively. The bottom inner wall of the guide rail (6) is fixedly installed with a second docking cover (63). The first docking cover (62) is connected to the corresponding second docking cover (63).

6. The RFID scanning equipment shielding door limiting device according to claim 5, characterized in that, A first magnet (64) is fixedly installed on the top inner wall of the first docking cover (62), and a second magnet (65) is fixedly installed on the bottom inner wall of the second docking cover (63). The first magnet (64) and the second magnet (65) are attracted to each other.

7. The RFID scanning equipment shielding door limiting device according to claim 4, characterized in that, Two support wheels (61) rotate on one side of the inner wall of the guide rail (6). The two support wheels (61) are located on both sides of the electromagnetic shielding cloth (5) and are in contact with both sides of the electromagnetic shielding cloth (5). The support wheels (61) are used to support and limit the electromagnetic shielding cloth (5).

8. The RFID scanning equipment shielding door limiting device according to claim 1, characterized in that, A drive motor (7) is fixedly installed on one side inner wall of the bracket (1), and the output shaft of the drive motor (7) is fixedly connected to the other end of the horizontal rotating shaft (21).

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