Single live wire power supply wireless collector based on NB-IOT

Abstract

The invention relates to the field of electrical structures, and discloses an NB-IOT-based single-live-wire power supply wireless collector, which comprises an 86 box, an NB-IOT room temperature collector single-live-wire power supply PCBA and a control panel, and further comprises a limiting square frame integrally and fixedly arranged on the inner walls of the four sides of the 86 box, and the limiting square frame is used for abutting against and being attached to the side wall of the back surface of the control panel; the protruding box is integrally and fixedly arranged at the top end of the 86 box, a rectangular empty groove with an opening in the front end is formed in the protruding box, and the protruding box is flush with the front end of the 86 box up and down; the clamping structures are arranged in the limiting square frame and the protruding box respectively and used for being fixedly connected with the control panel, and the control panel can be firmly clamped to the 86 box port through the clamping structures and can be disassembled at will. The invention has the advantages of beautiful appearance, convenient installation and disassembly, stable structure and the like, and has wide application prospect and market demand.

Description

Technical Field

[0001] The present invention relates to the field of electrical structures, and in particular to a single live wire powered wireless collector based on NB-IOT. Background Art

[0002] Nowadays, it has become a common phenomenon to directly install indoor NB-IOT temperature collectors in the intelligent information society. Data can be reported to the cloud server through the NB-IoT network, and the data collection cycle, reporting cycle and heating period can be set. By adapting different temperature and humidity sensors, it can be applied to residential houses and office buildings. There are many types of room temperature collectors on the market, including table-mounted, wall-mounted, socket-mounted, and 86-type switch-type. Among them, the 86-type single-fire switch-type temperature and humidity collector has a reasonable installation height, is not easy to move, and does not need to install batteries. It is the most ideal equipment for greenhouse collection. However, at present, indoor NB-IOT temperature collectors mostly use the shell and 86 box for snap-on or screw connection. When replacing and repairing, the panel shell will be forcibly disassembled, resulting in human damage and more serious failures of internal electronic components. At the same time, the snap-on or screw connection between the shell and the 86 box brings cumbersome steps for the overall disassembly and assembly of the NB-IOT temperature collector, which makes it difficult to carry out later repairs or replacements. For this reason, we propose a single-fire wire powered wireless collector based on NB-IOT. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the present invention provides a single live wire powered wireless collector based on NB-IOT to solve the above problems.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a single-fireline powered wireless collector based on NB-IOT, including an 86 box, an NB-IoT room temperature collector single-fireline powered PCBA and a control panel, wherein the NB-IoT room temperature collector single-fireline powered PCBA is fixed inside the 86 box, and the control panel is attached to the front end port of the 86 box, and further includes:

[0007] The limiting square frame is integrally fixed on the four inner walls of the 86 box, and the limiting square frame is used to abut against the back side wall of the control panel;

[0008] The protruding box is fixedly mounted on the top of the 86 box in an integrated manner, and a rectangular slot with an open front end is provided inside the protruding box, and the protruding box is flush with the front end of the 86 box;

[0009] The clamping structures for fixing and connecting the control panel are respectively arranged in the limiting frame and the protruding box. The clamping structure can firmly clamp the control panel at the port of the 86 box and can disassemble the control panel at will.

[0010] Preferably, the lateral width of the limiting frame from the front port of the 86 box is the same as the thickness of the control panel, that is, the front end side of the control panel is flush with the open end side of the 86 box.

[0011] Preferably, the two side walls of the protruding box are flush with the two side walls of the 86 box, the bottom inner wall of the rectangular slot is the top outer wall of the 86 box, and the width of the rectangular slot is greater than the thickness of the control panel.

[0012] Preferably, the clamping structure provided in the raised box includes a transverse rotation axis, a transverse plate, a semicircular ring, a short arc through groove and a long arc through groove. The raised box is rotatably installed with three transverse rotation axes corresponding to the inner wall of the side surface in the rectangular empty groove, and the three transverse rotation axes are laterally equidistantly distributed in the rectangular empty groove. The rectangular empty groove is parallel to the top outer wall of the 86 box and perpendicular to the control panel. A horizontal transverse plate is fixedly sleeved in the middle of the three transverse rotation axes. A through long arc through groove is opened at the top of the control panel corresponding to the three transverse rotation axes directly below. The two ends of the long arc through groove correspond to the top of the control panel. Symmetrical opening shape, the top of the 86 box corresponds to the two ends of each group of long arc grooves on the control panel, and two groups of symmetrical short arc grooves are provided, and each group of long arc grooves is connected with the short arc grooves at the two ends and is in an arc shape, one end of the horizontal plate is fixedly connected with an integrated semicircular ring part, and the semicircular ring part passes through the short arc groove on the 86 box and the long arc groove on the NB-IoT room temperature collector single-fire power supply PCBA in sequence, both ends of the semicircular ring part extend upward through the short arc groove and are higher than the top of the 86 box, and the axis point of the semicircular ring part is at the same position as the center point of the horizontal rotation axis.

[0013] Preferably, the clamping structure provided in the raised box also includes a knob part, a double-groove pulley, a single-groove pulley and a belt. A knob part is fixedly installed on the front end of the middle transverse shaft in the rectangular empty slot, and a double-groove pulley is also fixedly sleeved in front of the corresponding semicircular ring part on the middle transverse shaft. Single-groove pulleys are fixedly sleeved on the two transverse shafts on both sides of the rectangular empty slot, and belts are sleeved between the single-groove pulleys on the transverse shafts on both sides and the double-groove pulley on the middle transverse shaft.

[0014] Preferably, the length of the transverse rotation axis on both sides of the rectangular slot is smaller than the length of the middle transverse rotation axis, and the front ends of the transverse rotation axes on both sides are fixedly installed with limiting disks, the diameter of the limiting disks is larger than the diameter of the knob member, and arc grooves are provided on the bottom inner wall of the rectangular slot corresponding to the lower parts of the two groups of limiting disks, and the bottom ends of the limiting disks are rotatably engaged in the arc grooves.

[0015] Preferably, the clamping structure in the limiting frame includes a conductive coil and an iron core rod, and the iron core rods are embedded in the corresponding two side areas and bottom area of ​​the limiting frame, and each group of iron core rods is wound with a conductive coil, and the two ends of the conductive coil are electrically connected to the power supply module in the NB-IoT room temperature collector single-fire power supply PCBA, and an electrical switch is arranged between the conductive coil and the NB-IoT room temperature collector single-fire power supply PCBA and is located in a rectangular empty slot, and the conductive coil and the iron core rod can generate a magnetic field, and the back of the control panel corresponding to the area in contact with the limiting frame is embedded with a magnet sheet, and the magnet sheet can be magnetically attracted to the magnetic field generated by the conductive coil and the iron core rod.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the present invention provides a single live wire powered wireless collector based on NB-IOT, which has the following beneficial effects:

[0018] 1. The single live wire powered wireless collector based on NB-IOT improves the overall appearance of the single live wire powered wireless collector based on NB-IOT by fitting the control panel into the 86 box without any protruding parts, has a better application range, and replaces the traditional bolt connection or snap connection method, which is very easy to disassemble and the process is simple and quick.

[0019] 2. The single live wire powered wireless collector based on NB-IOT mainly uses a magnetic attraction structure and a rotatable circular ring connection structure. Both removal and installation are convenient and fast, which improves the efficiency of maintenance and replacement of parts, and improves the later maintainability and user practicality of the wireless collector.

[0020] 3. The three groups of long arc slots on the control panel and the multiple groups of short arc slots on the top of the E box of the NB-IOT-based single live wire powered wireless collector are all circular curved arcs that match the semicircular ring parts. This design ensures the smoothness and accuracy of the semicircular ring parts during the flipping process, while also enhancing the stability of the overall structure. The magnetic fixing method not only improves the reliability of the connection, but also reduces the risk of loosening due to vibration or external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of 86 boxes of the present invention;

[0023] Figure 3 for Figure 2 A local enlarged schematic diagram of the A in FIG.

[0024] Figure 4 This is a schematic diagram of the connection structure of three groups of semicircular rings of the present invention;

[0025] Figure 5 This is a cross-sectional schematic diagram of the connection between the 86 box and the control panel of the present invention;

[0026] Figure 6 This is a schematic diagram of the back side of the control panel of the present invention;

[0027] Figure 7 for Figure 5 A local enlarged schematic diagram of point B in FIG.

[0028] Figure 8 This is a logic diagram of the single-fire power supply PCBA circuit of the NB-IoT room temperature collector of the present invention.

[0029] In the figure: 1. 86 box; 2. NB-IoT room temperature collector single-fire power supply PCBA; 3. Control panel; 4. Limiting box; 5. Raised box; 6. Rectangular empty slot; 7. Conductive coil; 8. Iron core rod; 9. Horizontal rotation axis; 10. Horizontal plate; 11. Semicircular ring; 12. Knob; 13. Double-groove pulley; 14. Single-groove pulley; 15. Belt; 16. Limiting disc; 17. Arc groove; 18. Short arc through slot; 19. Long arc through slot; 20. Magnet sheet. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-8 The NB-IOT-based single-fireline powered wireless collector includes an 86 box 1, an NB-IoT room temperature collector single-fireline powered PCBA 2, and a control panel 3. The NB-IoT room temperature collector single-fireline powered PCBA 2 is fixed inside the 86 box 1, and the control panel 3 is attached to the front end port of the 86 box 1, and also includes:

[0032] The limiting square frame 4 is integrally fixed on the four inner walls of the box 1, and the limiting square frame 4 is used to abut against the back side wall of the control panel 3;

[0033] The protruding box 5 is integrally fixed on the top of the 86 box 1. A rectangular slot 6 with a front opening is provided inside the protruding box 5, and the protruding box 5 is flush with the front end of the 86 box 1;

[0034] The clamping structures for fixing the control panel 3 are respectively arranged in the limiting frame 4 and the protruding box 5. The clamping structures can firmly clamp the control panel 3 at the port of the 86 box 1 and can disassemble the control panel 3 at will.

[0035] The lateral width of the limiting frame 4 from the front port of the 86 box 1 is the same as the thickness of the control panel 3, that is, the front end side of the control panel 3 is flush with the open end side of the 86 box 1. At this time, the limiting function of the limiting frame 4 is used. After the control panel 3 is snapped into the 86 box 1, it can be determined that the control panel 3 is completely fitted in the 86 box 1, and the front end outer surfaces of the 86 box 1 and the control panel 3 are flush.

[0036] The two side walls of the raised box 5 are flush with the two side walls of the 86 box 1 , the bottom inner wall of the rectangular slot 6 is the top outer wall of the 86 box 1 , and the width of the rectangular slot 6 is greater than the thickness of the control panel 3 .

[0037] The clamping structure provided in the raised box 5 includes a transverse rotation axis 9, a transverse plate member 10, a semicircular ring member 11, a short arc through groove 18 and a long arc through groove 19. The raised box 5 is rotatably installed with three transverse rotation axes 9 corresponding to the inner wall of the side of the rectangular empty groove 6, and the three transverse rotation axes 9 are laterally equidistantly distributed in the rectangular empty groove 6. The rectangular empty groove 6 is parallel to the top outer wall of the 86 box 1 and perpendicular to the control panel 3. A horizontal transverse plate member 10 is fixedly sleeved in the middle of the three transverse rotation axes 9. A through long arc through groove 19 is opened at the top of the control panel 3 corresponding to the three transverse rotation axes 9 directly below. The two ends of the long arc through groove 19 correspond to the top of the control panel 3. The top of the 86 box 1 is symmetrically opened, and two groups of symmetrical short arc grooves 18 are provided at the two ends of each group of long arc grooves 19 on the control panel 3, and each group of long arc grooves 19 is connected to the short arc grooves 18 at the two ends and is in an arc shape. One end of the horizontal plate 10 is fixedly connected with an integrated semicircular ring member 11, and the semicircular ring member 11 passes through the short arc grooves 18 on the 86 box 1 and the long arc grooves 19 on the control panel 3 in sequence, and both ends of the semicircular ring member 11 extend upward through the short arc grooves 18 and are higher than the top of the 86 box 1, and the axis point of the semicircular ring member 11 is at the same position as the center point of the horizontal rotation axis 9.

[0038] The clamping structure provided in the raised box 5 also includes a knob part 12, a double-groove pulley 13, a single-groove pulley 14 and a belt 15. The front end of the middle transverse shaft 9 in the rectangular empty slot 6 is fixedly installed with a knob part 12, and the front of the corresponding semicircular ring part 11 on the middle transverse shaft 9 is also fixedly sleeved with a double-groove pulley 13. The two transverse shafts 9 on both sides of the rectangular empty slot 6 are fixedly sleeved with single-groove pulleys 14, and the single-groove pulleys 14 on the transverse shafts 9 on both sides are sleeved with a belt 15 between the double-groove pulleys 13 on the middle transverse shaft 9. The transverse shaft 9 in the middle of the rectangular empty slot 6 is rotated by the knob part 12, and the double-groove pulley The connection between the pulley 13, the single-groove pulley 14 and the belt 15 can make the three transverse shafts 9 rotate synchronously, so that the semicircular ring member 11 connected to the three transverse shafts 9 through the transverse plate member 10 will flip 180 degrees with the transverse shaft 9 as the center point. At this time, the semicircular ring member 11 will move in a circular motion along the short arc groove 18 on the 86 box 1 and the long arc groove 19 in the control panel 3, and after flipping 180 degrees, the semicircular ring member 11 is symmetrical with the original state, that is, the semicircular ring member 11 is completely separated from the 86 box 1 and the control panel 3, that is, the fixed connection between the 86 box 1 and the control panel 3 is released, so that the control panel 3 can be removed from the 86 box 1.

[0039] The length of the transverse rotation axis 9 on both sides of the rectangular slot 6 is shorter than the length of the middle transverse rotation axis 9, and the front ends of the transverse rotation axis 9 on both sides are fixedly installed with limiting disks 16, the diameter of the limiting disk 16 is larger than the diameter of the knob 12, and arc grooves 17 are provided on the bottom inner wall of the rectangular slot 6 corresponding to the lower parts of the two groups of limiting disks 16, and the bottom ends of the limiting disks 16 are rotatably engaged in the arc grooves 17, so as to limit the rotation of the transverse rotation axis 9 on both sides of the rectangular slot 6, thereby ensuring that the transverse rotation axis 9 on both sides of the rectangular slot 6 are always in a horizontal state, thereby improving the stability of the structure operation.

[0040] The clamping structure in the limiting frame 4 includes a conductive coil 7 and an iron core rod 8. The iron core rod 8 is embedded in the corresponding two sides and bottom areas of the limiting frame 4, and each group of iron core rods 8 is wound with a conductive coil 7. The two ends of the conductive coil 7 are electrically connected to the power supply module in the NB-IoT room temperature collector single-fire power supply PCBA2, and an electrical switch is arranged between the conductive coil 7 and the NB-IoT room temperature collector single-fire power supply PCBA2 and is located in the rectangular slot 6. Using the magnetoelectric principle, the conductive coil 7 and the iron core rod 8 can generate a magnetic field, and the back of the control panel 3 corresponding to the area in contact with the limiting frame 4 is embedded with a magnet sheet 20, and the magnet sheet 20 can be magnetically attracted to the magnetic field generated by the conductive coil 7 and the iron core rod 8.

[0041] Working principle: When there is a problem with the NB-IoT room temperature collector single-fire power supply PCBA2 or the control panel 3 in the NB-IOT-based single-fire power supply wireless collector, it is necessary to disassemble the NB-IOT-based single-fire power supply wireless collector as a whole, and then perform maintenance and replacement operations. At this time, the electrical switch in the rectangular slot 6 is used to release the electrification of the conductive coil 7, that is, at this time, the conductive coil 7 and the iron core rod 8 are no longer magnetic, and the magnet pieces 20 on the left and right sides and the bottom of the control panel 3 are not magnetically attracted to the limit frame 4. Then, the horizontal rotation axis 9 in the middle of the rectangular slot 6 is rotated by the knob member 12. At this time, it is rotated 180 degrees. Through the connection of the double-groove pulley 13, the single-groove pulley 14 and the belt 15, the three horizontal rotation axes 9 can rotate synchronously. At this time, the semicircular ring member 11 connected to the three horizontal rotation axes 9 through the horizontal plate member 10 will flip with the horizontal rotation axis 9 as the center point. 180 degrees, at this time, the semicircular ring 11 will move in a circular motion along the short arc groove 18 on the 86 box 1 and the long arc groove 19 in the control panel 3, and after turning over 180 degrees, the semicircular ring 11 is symmetrical with the original state, that is, the semicircular ring 11 is completely separated from the 86 box 1 and the control panel 3, that is, the fixed connection between the 86 box 1 and the control panel 3 is released, so that the control panel 3 can be removed from the 86 box 1, and then the NB-IoT room temperature collector single-fire power supply PCBA2 and the control panel 3 can be repaired and replaced. The single-fire line power supply wireless collector based on NB-IOT improves the overall appearance of the single-fire line power supply wireless collector based on NB-IOT by fitting the control panel 3 in the 86 box 1 without any protruding parts, has a better application range, and replaces the traditional bolt connection or snap connection method, which is very convenient for disassembly, and the process is simple and fast;

[0042] When installing the control panel 3 in the 86 box 1, it is only necessary to align and snap the control panel 3 into the 86 box 1 until the control panel 3 is completely fitted against the limit frame 4, and then the knob 12 in the rectangular slot 6 is used to reversely rotate the transverse axis 9 by 180 degrees. At this time, the limit frame 4 is used for the limiting effect. After the control panel 3 is snapped into the 86 box 1, it can be determined that the control panel 3 is completely fitted into the 86 box 1, and the front end outer surfaces of the 86 box 1 and the control panel 3 are flush up and down. At the same time, since the three groups of long arc grooves 19 on the control panel 3 and the multiple groups of short arc grooves 18 on the top of the 86 box 1 are all circular curved arcs that are compatible with the semicircular ring member 11, it can be known from the properties of the circle that the displacement trajectory of the semicircular ring member 11 must coincide with the combination of the long arc grooves 19 and the two groups of short arc grooves 18 and are located in the circular trajectory. That is, the short arc groove 18 on the 86 box 1 must be aligned with the long arc groove 19 on the control panel 3 after the control panel 3 is snapped in, and then the knob part 12 can be rotated to turn the semicircular ring parts 11 on the three transverse shafts 9 in turn to pass through the short arc groove 18 on the 86 box 1 and the long arc groove 19 in the control panel 3, and the end of the semicircular ring part 11 extends through the short arc groove 18 on the 86 box 1, thereby preliminarily connecting the 86 box 1 and the control panel 3, and then open the electrical switch in the rectangular slot 6, so that the power supply module on the NB-IoT room temperature collector single-fire power supply PCBA2 energizes the conductive coil 7, and the conductive coil 7 and the iron core rod 8 are produced, so that the limit frame 4 is magnetically attracted to the magnet sheet 20 on the back side of the control panel 3, thereby completely fixing the control panel 3 in the 86 box 1, and completing the installation operation.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A single-live-wire powered wireless collector based on NB-IOT, comprising an 86 box (1), an NB-IoT room temperature collector single-live-powered PCBA (2) and a control panel (3), wherein the NB-IoT room temperature collector single-live-powered PCBA (2) is fixedly arranged inside the 86 box (1), and the control panel (3) is snapped onto the front end port of the 86 box (1). Features: Also includes: A limiting square frame (4) is integrally fixed on the four inner walls of the box (1), and the limiting square frame (4) is used to abut against the back side wall of the control panel (3); A protruding box (5) is integrally fixed on the top of the 86 box (1), wherein a rectangular slot (6) with a front end opening is provided inside the protruding box (5), and the front ends of the protruding box (5) and the 86 box (1) are flush with each other in vertical direction; A clamping structure for fixing the control panel (3) is respectively arranged in the limiting square frame (4) and the protruding box (5); the clamping structure is used to firmly clamp the control panel (3) at the port of the 86 box (1) and can quickly disassemble the control panel (3).

2. According to claim 1, the single live wire powered wireless collector based on NB-IOT, Features: The transverse width of the limiting frame (4) from the front port of the 86 box (1) is the same as the thickness of the control panel (3), that is, the front end side of the control panel (3) is flush with the open end side of the 86 box (1).

3. According to claim 1, the single live wire powered wireless collector based on NB-IOT, Features: The side walls of the protruding box (5) are flush with the side walls of the 86 box (1) in the upper and lower directions, the bottom inner wall of the rectangular slot (6) is the top outer wall of the 86 box (1), and the width of the rectangular slot (6) is greater than the thickness of the control panel (3).

4. According to claim 3, the single live wire powered wireless collector based on NB-IOT, Features: The clamping structure arranged in the protruding box (5) comprises a transverse rotation axis (9), a transverse plate member (10), a semicircular ring member (11), a short arc through groove (18) and a long arc through groove (19); the protruding box (5) is rotatably mounted with three transverse rotation axes (9) corresponding to the inner wall of the side surface of the rectangular hollow groove (6); and the three transverse rotation axes (9) are horizontally and equidistantly distributed in the rectangular hollow groove (6); the rectangular hollow groove (6) is parallel to the top outer wall of the 86 box (1) and is perpendicular to the control panel (3); a horizontal transverse plate member (10) is fixedly sleeved at the middle of the three transverse rotation axes (9); a through long arc through groove (19) is opened at the top of the control panel (3) corresponding to the three transverse rotation axes (9) directly below; the two ends of the long arc through groove (19) correspond to the control panel ( The top of the 86 box (1) is symmetrically opened, and the top of the 86 box (1) is provided with two groups of symmetrical short arc grooves (18) at the two ends corresponding to each group of long arc grooves (19) on the control panel (3), and each group of long arc grooves (19) is connected to the short arc grooves (18) at the two ends and is in an arc shape. One end of the horizontal plate (10) is fixedly connected with an integrated semicircular ring member (11), and the semicircular ring member (11) passes through the short arc grooves (18) on the 86 box (1) and the long arc grooves (19) on the control panel (3) in sequence. Both ends of the semicircular ring member (11) extend upward through the short arc grooves (18) and are higher than the top of the 86 box (1), and the axis point of the semicircular ring member (11) is located at the same position as the center point of the horizontal rotation axis (9).

5. According to claim 4, the single live wire powered wireless collector based on NB-IOT, Features: The clamping structure arranged in the protruding box (5) further comprises a knob member (12), a double-groove pulley (13), a single-groove pulley (14) and a belt (15); the knob member (12) is fixedly mounted on the front end of a middle transverse shaft (9) in the rectangular hollow groove (6); a double-groove pulley (13) is fixedly sleeved in front of a corresponding semicircular ring member (11) on the middle transverse shaft (9); single-groove pulleys (14) are fixedly sleeved on two transverse shafts (9) located on both sides of the rectangular hollow groove (6); and belts (15) are sleeved between the single-groove pulleys (14) on the transverse shafts (9) on both sides and the double-groove pulley (13) on the middle transverse shaft (9).

6. According to claim 4, the single live wire powered wireless collector based on NB-IOT, Features: The lengths of the transverse rotation axes (9) on both sides of the rectangular slot (6) are shorter than the length of the middle transverse rotation axis (9), and the front ends of the transverse rotation axes (9) on both sides are fixedly mounted with limit disks (16), the diameter of the limit disks (16) is larger than the diameter of the knob (12), and curved grooves (17) are provided on the bottom inner wall of the rectangular slot (6) corresponding to the lower parts of the two groups of limit disks (16), and the bottom ends of the limit disks (16) are rotatably engaged in the curved grooves (17).

7. According to claim 1, the single live wire powered wireless collector based on NB-IOT, Features: The clamping structure in the limiting frame (4) comprises a conductive coil (7) and an iron core rod (8), the limiting frame (4) is embedded with iron core rods (8) in the corresponding two side and bottom regions, and each group of iron core rods (8) is wound with a conductive coil (7), the two ends of the conductive coil (7) are electrically connected to the power supply module in the NB-IoT room temperature collector single-fire power supply PCBA (2), and an electrical switch is provided between the conductive coil (7) and the NB-IoT room temperature collector single-fire power supply PCBA (2) and is located in the rectangular slot (6), and the conductive coil (7) and the iron core rod (8) can generate a magnetic field, and the back of the control panel (3) corresponding to the region in contact with the limiting frame (4) is embedded with a magnet sheet (20), and the magnet sheet (20) can be magnetically attracted to the magnetic field generated by the conductive coil (7) and the iron core rod (8).

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