Magnetic induction key structure for explosion-proof box

Abstract

The utility model relates to the technical field of explosion-proof boxes, in particular to a magnetic induction key structure for an explosion-proof box, which comprises an explosion-proof box and a magnetic induction element positioned in the explosion-proof box. The button assembly is arranged on the outer side of the explosion-proof box, the button assembly comprises a magnet which is arranged corresponding to the magnetic induction element and matched with the magnetic induction element in a magnetic induction mode, and the magnet can move towards or away from the magnetic induction element; and the magnetic shielding assembly enables the magnetic induction element to only receive the magnetic field of the magnet corresponding to the magnetic induction element. The magnetic shielding sleeve and the magnetic shielding cover are arranged on the magnet and the magnetic induction element respectively, so that the emitting end and the receiving end are magnetically shielded in two directions, the directionality of magnetic field transmission is improved, mutual interference of magnetic fields between magnetic control buttons in the multi-button structure is avoided, and the operation precision of the magnetic control buttons is improved.

Description

Technical Field

[0001] This application relates to the field of explosion-proof box technology, and in particular to a magnetic induction button structure for explosion-proof boxes. Background Technology

[0002] Due to the special safety requirements of explosion-proof enclosures, they must be certified separately for explosion protection. Existing explosion-proof enclosures have buttons installed on them, which require drilling holes in the enclosure lid. This inevitably creates gaps at the joint between the buttons and the lid, affecting the explosion-proof sealing performance and increasing the difficulty of overall explosion-proof certification.

[0003] Magnetic control buttons can achieve seamless installation with explosion-proof boxes. However, with the development of the intelligent manufacturing industry, many devices have complicated functions, which requires a large number of buttons. As the number of buttons increases, the spacing between magnetic control buttons decreases, and the magnetic fields between the magnetic control buttons are prone to mutual interference, resulting in lower operating accuracy of the magnetic control buttons. Utility Model Content

[0004] The technical problem to be solved by this invention is that the magnetic fields between the magnetic control buttons in a multi-button structure are prone to mutual interference, resulting in low operating accuracy of the magnetic control buttons.

[0005] Therefore, this utility model provides a magnetic induction button structure for explosion-proof boxes.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A magnetic induction button structure for an explosion-proof box includes,

[0008] Explosion-proof box, and

[0009] A magnetic induction element, wherein the magnetic induction element is located inside an explosion-proof enclosure;

[0010] A button assembly is disposed on the outside of the explosion-proof box. The button assembly includes a magnet that is correspondingly disposed and magnetically engaged with a magnetic induction element. The magnet is capable of moving toward or away from the magnetic induction element.

[0011] A magnetic shielding assembly that allows a magnetic induction element to receive only the magnetic field of its corresponding magnet.

[0012] Furthermore, the button assembly also includes a seat, a spring, and a push rod. The seat is fixedly connected to the outside of the explosion-proof box via a mounting plate. The push rod passes through the seat. The spring is sleeved on the push rod and positioned between the seat and the push rod for the push rod to reset. The magnet is positioned on the end of the push rod facing the explosion-proof box.

[0013] Furthermore, a limiting ring is connected to one end of the seat cover, and a nut is threadedly connected to the end of the seat cover that passes through the mounting plate and faces the explosion-proof box. The limiting ring and the nut fix the seat cover to the mounting plate.

[0014] Furthermore, a retaining ring is provided between the magnet and the seat sleeve.

[0015] Furthermore, the magnetic induction element and the magnet are arranged along the axial direction of the top rod.

[0016] Furthermore, the magnetic shielding assembly includes a magnetic shielding sleeve, which is fitted onto the magnet.

[0017] Furthermore, the magnetic shielding sleeve is configured as a tube, which shields the magnetic field emitted from around the magnet while retaining the magnetic field emitted by the magnet toward the magnetic induction element.

[0018] Furthermore, the magnetic shielding assembly also includes a magnetic shielding cover, which is disposed on the magnetic induction element. The magnetic shielding cover is used to shield the magnetic field from the surroundings of the magnetic induction element, so that the magnetic induction element only receives the magnetic field from the direction of the magnet.

[0019] The beneficial effect of this utility model is that by setting magnetic shielding sleeves and magnetic shielding covers on the magnet and magnetic induction element respectively, magnetic shielding is carried out bidirectionally from the transmitting end and the receiving end, improving the directionality of magnetic field transmission, thereby avoiding mutual interference between magnetic fields of magnetic control buttons in multi-button structures and improving the operating accuracy of magnetic control buttons. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a structural diagram of the magnetic induction button structure for the explosion-proof box in this utility model.

[0022] Figure 2 This is a structural schematic diagram showing the positional relationship between the magnet and the magnetic induction element in this utility model.

[0023] Figure 3 This is a structural schematic diagram of the button assembly in this utility model.

[0024] In the diagram: 1. Explosion-proof box body; 11. Explosion-proof box top cover; 12. Mounting slot; 13. Mounting plate; 2. Button assembly; 21. Seat sleeve; 22. Limiting plate; 23. Nut; 24. Spring; 25. Top rod; 26. Magnet; 27. Screw; 28. Snap ring; 3. Magnetic induction element; 4. Magnetic control PCB board; 5. Stud; 6. Magnetic shielding assembly; 61. Magnetic shielding sleeve; 62. Magnetic shielding cover. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] A magnetic induction button structure for an explosion-proof box includes an explosion-proof box body 1, an explosion-proof box top cover 11, and a button assembly 2. The explosion-proof box top cover 11 is seamlessly connected to the explosion-proof box body 1. The explosion-proof box top cover 11 is provided with a mounting groove 12, and a mounting plate 13 for covering the mounting groove 12 and mounting the button assembly 2 is bolted to the explosion-proof box top cover 11.

[0029] The button assembly 2 includes a seat 21, a push rod 25, a spring 24, a magnet 26, and a nut 23. One end of the seat 21 is connected to a limit ring. The outer side wall of the seat 21 is threaded. The seat 21 extends through the mounting plate 13 into the mounting groove 12. The limit ring abuts against the side wall of the mounting plate 13 away from the bottom of the mounting groove 12. The nut 23 is threadedly connected to the end of the seat 21 located in the mounting groove 12. The nut 23 engages with the thread on the outer side wall of the seat 21 until the nut 23 abuts against the mounting plate 13. The limit ring and the nut 23 fix the seat 21 to the mounting plate 13.

[0030] Spring 24 is installed inside seat sleeve 21. Push rod 25 passes through spring 24. One end of spring 24 near the bottom of mounting groove 12 is fixedly connected to the inner side wall of seat sleeve 21, and the other end abuts against the head of push rod 25. Push rod 25 protrudes from one end of seat sleeve 21 located in mounting groove 12. Magnet 26 is threadedly fastened to one end of push rod 25 located in mounting groove 12 by screw 27. Magnet 26 is provided with a through hole for screw 27 to pass through. Snap ring 28 is provided between magnet 26 and end of seat sleeve 21.

[0031] Inside the explosion-proof box, a magnetic control PCB board 4 is installed by studs 5. The magnetic control PCB board 4 is provided with a magnetic induction element 3 corresponding to the magnet 26. In this embodiment, the magnetic induction element 3 is arranged directly below the corresponding magnet 26 along the axial direction of the seat sleeve 21.

[0032] It should be noted that, in order to accommodate the control of intelligent devices, and given the numerous functions required by these devices, the corresponding mounting plate 13 is equipped with multiple button assemblies 2. Each button assembly 2 has a magnet 26 positioned opposite to a corresponding magnetic induction element 3. Due to the large number of button assemblies 2, the distance between them is reduced. To avoid opening holes in the explosion-proof box, a non-contact button is designed using the magnetic field interaction between the magnet 26 and the magnetic induction element 3. The magnet 26 forms an arc-shaped magnetic field radiating outwards and backwards with the axial direction of the base sleeve 21 as its centerline. For adjacent button assemblies 2 with limited installation distance, there is cross-magnetic interference, which may cause button malfunction or misoperation during normal button operation. Therefore, to avoid magnetic interference between adjacent button assemblies 2, the explosion-proof box for the multi-functional magnetic control button in this application also includes a magnetic shielding assembly 6.

[0033] The magnetic shielding assembly 6 includes a magnetic shielding sleeve 61 and a magnetic shielding cover 62. Both the magnetic shielding sleeve 61 and the magnetic shielding cover 62 are made of tin-plated tinplate. The magnetic shielding sleeve 61 is tubular and fits onto the base sleeve 21, with the magnet 26 located inside the magnetic shielding sleeve 61. The magnetic shielding cover 62 is an open fence-like structure that covers the magnetic induction element 3. The magnetic shielding sleeve 61 shields the scattered magnetic field around the magnet 26, retaining a unidirectional downward magnetic field at the bottom of the button, thereby achieving directional magnetic induction between the magnet 26 and the corresponding magnetic induction element 3, and solving the problem of cross-magnetic field interference between adjacent buttons. The reliability of the magnetically controlled button operation is improved.

[0034] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A magnetic induction button structure for an explosion-proof box, characterized in that, include, The explosion-proof box body (1), and Magnetic induction element (3), the magnetic induction element (3) is located inside the explosion-proof box body (1); Button assembly (2), the button assembly (2) is disposed on the outside of the explosion-proof box body (1), the button assembly (2) includes a magnet (26) corresponding to and magnetically cooperating with the magnetic induction element (3), the magnet (26) can move toward or away from the magnetic induction element (3); The magnetic shielding component (6) enables the magnetic induction element (3) to receive only the magnetic field of its corresponding magnet (26).

2. The magnetic induction button structure for explosion-proof boxes according to claim 1, characterized in that, The button assembly (2) also includes a seat (21), a spring (24) and a push rod (25). The seat (21) is fixedly connected to the outside of the explosion-proof box by a mounting plate (13). The push rod (25) passes through the seat (21). The spring (24) is sleeved on the push rod (25) and is set between the seat (21) and the push rod (25) for the reset of the push rod (25). The magnet (26) is set on the end of the push rod (25) facing the explosion-proof box.

3. The magnetic induction button structure for explosion-proof boxes according to claim 2, characterized in that, One end of the seat sleeve (21) is connected to a limiting ring, and the end of the seat sleeve (21) that passes through the mounting plate (13) and faces the explosion-proof box body (1) is threaded with a nut (23). The limiting ring and the nut (23) fix the seat sleeve (21) to the mounting plate (13).

4. The magnetic induction button structure for explosion-proof boxes according to claim 3, characterized in that, A retaining ring (28) is provided between the magnet (26) and the seat (21).

5. The magnetic induction button structure for explosion-proof boxes according to claim 1, characterized in that, The magnetic induction element (3) and the magnet (26) are arranged along the axial direction of the top rod (25).

6. The magnetic induction button structure for explosion-proof boxes according to claim 1, characterized in that, The magnetic shielding assembly (6) includes a magnetic shielding sleeve (61), which is fitted onto the magnet (26).

7. The magnetic induction button structure for explosion-proof boxes according to claim 6, characterized in that, The magnetic shielding sleeve (61) is tubular. The magnetic shielding sleeve (61) shields the magnetic field emitted around the magnet (26) while retaining the magnetic field emitted by the magnet (26) toward the magnetic induction element (3).

8. The magnetic induction button structure for explosion-proof boxes according to claim 1, characterized in that, The magnetic shielding assembly (6) further includes a magnetic shielding cover (62), which covers the magnetic induction element (3). The magnetic shielding cover (62) is used to shield the magnetic field from the surrounding area of ​​the magnetic induction element (3), so that the magnetic induction element (3) only receives the magnetic field from the direction of the magnet (26).

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