Punching-free programmable intelligent explosion-proof box

Abstract

The utility model relates to the field of explosion-proof distribution boxes, in particular to a punching-free programmable intelligent explosion-proof box. Comprising an explosion-proof box body, the explosion-proof box body is provided with a transparent input area and a display window, a controller is arranged in the explosion-proof box body, the controller is electrically connected with an input system and a display, the input system is arranged in the input area of the explosion-proof box body, and the input system comprises a circuit board installed in a box body. The keys are mounted on the outer surface of the box body, and photoelectric recognition units in one-to-one correspondence with the keys are arranged on the circuit board; the key comprises a key cap and a shaft body, the shaft body is installed on the box wall in a vertically movable mode, and the bottom face of the shaft body is provided with a light reflecting part. The photoelectric identification unit comprises a light source and a photosensitive element. The light beam is reflected by the reflective part and identified by the photosensitive element. According to the scheme, the box wall does not need to be punched, and whether the key is pressed down or not can be identified only by penetrating light through the transparent input area box wall and reflecting the light back into the box body by the bottom of the pressed key.

Description

Technical Field

[0001] The utility model relates to the field of explosion-proof distribution boxes, in particular to a punch-free programmable intelligent explosion-proof box. Background Art

[0002] In chemical plants with flammable gases or factories with high dust content, it is necessary to ensure that there is no open flame in the factory. Because electrical equipment will generate sparks during the opening and closing control process, explosion-proof boxes are used to seal the electrical equipment.

[0003] As modern factories become more automated, the complexity of electrical control systems is also increasing. Consequently, programmable logic controllers (PLCs) are being used to implement more complex control operations. However, PLCs require new inputs to modify control logic or upgrade control programs.

[0004] The traditional solution uses contact buttons for program input. The buttons are mounted on the enclosure, and holes must be punched through the enclosure wall to insert the buttons. This complicates the enclosure manufacturing process and increases manufacturing costs. Furthermore, the need for drilling holes in the enclosure can affect the enclosure's sealing. Over time, or in harsh operating environments, the seals can easily age. Utility Model Content

[0005] The purpose of the utility model is to overcome the problem in the prior art that if a signal needs to be input to a controller in an explosion-proof box, holes need to be punched on the surface of the box. The utility model provides a punch-free programmable intelligent explosion-proof box, including an explosion-proof box body, an input area and a display window on the explosion-proof box body, the box walls of the input area and the display window are made of transparent material, a controller is arranged in the explosion-proof box body, and the controller is electrically connected to the input system and the display.

[0006] The display is arranged in the box and faces the display window.

[0007] The input system is arranged in the input area of ​​the explosion-proof box body. The input system includes a circuit board installed in the box body and several buttons installed on the outer surface of the box body. The circuit board is provided with photoelectric recognition units corresponding to the buttons one by one.

[0008] The button includes a keycap and a shaft body, and the shaft body can be mounted on the box wall movably up and down, and the bottom surface of the shaft body has a reflective portion; the photoelectric recognition unit includes a light source and a photosensitive element. When the button is pressed, the light beam emitted by the light source is aligned with the reflective portion at the bottom of the shaft body, and the light beam is reflected by the reflective portion and recognized by the photosensitive element.

[0009] Preferably, a spring is provided on the button, and the spring bounces the button upward.

[0010] Preferably, a mounting seat is provided on the surface of the box body, and button holes corresponding to the buttons are provided on the mounting seat. The buttons are provided with outward flanges, and when the buttons are in the pop-up state, the flanges are pressed tightly and stuck on the mounting seat.

[0011] Preferably, the mounting base includes a base and a cover plate, the base is provided with through holes corresponding to the keys one by one, and the key shaft is slidably set in the through hole of the base; the cover plate is provided with a key hole, and the key cap of the key is stuck in the key hole of the cover plate.

[0012] Preferably, the mounting seat is arranged in the input area of ​​the box body, and a gap is reserved between the base and the input area.

[0013] Preferably, a light shield is provided at the bottom of the button. When the button is in the pop-up state, the light shield blocks and absorbs the light beam emitted by the light source; when the button is pressed, the bottom of the button pushes the light shield away to align with the light beam.

[0014] Preferably, the light shielding body is an elastic membrane fixed below the bottom of the key, and a plurality of cutouts are radially opened on the light shielding body.

[0015] The application of the above technical solution of the utility model to a punch-free programmable intelligent explosion-proof box has the following effects:

[0016] This application utilizes a controller within the enclosure to implement complex circuit control. In industry, this controller is typically a PLC, though embedded systems may be used in some cases. The controller includes a display to assist the operator in inputting information. The display is mounted within the enclosure in a transparent window.

[0017] The input system consists of a circuit board housed within the enclosure and buttons located outside. The enclosure's walls, separating the circuit board and buttons, are made of transparent material. Using a non-contact method, a light source is mounted on the circuit board. When a button is pressed, the light beam from the light source passes through the transparent enclosure wall and strikes the bottom of the button. The beam is then reflected by the bottom of the button and passes through the transparent enclosure wall again to the photosensitive element on the circuit board for recognition.

[0018] When the key is released, the light source's beam no longer illuminates the bottom of the key and is therefore no longer reflected back to the photosensitive element. This determines whether the key is pressed. This solution eliminates the need for drilling holes in the enclosure; only movable keys need to be installed outside the enclosure. All powered devices are located within the enclosure, enhancing the enclosure's sealing and explosion-proof capabilities.

[0019] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is a front view of the box body of the utility model;

[0021] Figure 2 It is a cross-sectional view of the internal structure of the utility model;

[0022] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 It is a three-dimensional diagram of a light-shielding body.

[0024] Description of Reference Numerals

[0025] 1- cabinet, 1a- input area, 1b- display window;

[0026] 2-Controller;

[0027] 3-Display;

[0028] 4-circuit board, 4a-light source, 4b-photosensitive element;

[0029] 5-button, 5a-keycap, 5b-axis, 5c-spring;

[0030] 6-mounting seat, 6a-base, 6b-cover;

[0031] 7-Light-shielding body;

[0032] 8-beam;

[0033] 9-Spring. DETAILED DESCRIPTION

[0034] The following is a detailed description of the specific embodiments of the present invention. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0035] In this utility model, unless otherwise stated, directional words such as "upper" and "lower" generally refer to the directions in the assembled and used state. "Inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0036] It should be noted that the terms "first," "second," and the like in the specification and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate for the embodiments of the present invention described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatuses.

[0037] The utility model provides a punch-free programmable intelligent explosion-proof box, including an explosion-proof box body, an input area 1a and a display window 1b on the explosion-proof box body, the box wall of the input area 1a and the display window 1b is made of transparent material, a controller 2 is set in the explosion-proof box body, and the controller 2 is electrically connected to the input system and the display 3.

[0038] The display 3 is disposed in the housing 1 and faces the display window 1 b.

[0039] The input system is arranged in the input area 1a of the explosion-proof box body. The input system includes a circuit board 4 installed in the box body 1 and a plurality of buttons 5 installed on the outer surface of the box body 1. The circuit board 4 is provided with a photoelectric recognition unit corresponding to each button 5.

[0040] The button 5 includes a keycap 5a and a shaft 5b. The shaft 5b can be mounted on the box wall and can move up and down. The bottom surface of the shaft 5b has a reflective portion. The photoelectric recognition unit includes a light source 4a and a photosensitive element 4b. When the button 5 is pressed, the light beam 8 emitted by the light source 4a is aligned with the reflective portion at the bottom of the shaft 5b. The light beam 8 is reflected by the reflective portion and recognized by the photosensitive element 4b.

[0041] The housing 1 comprises a main body 1 and a lid. The housing 1 is selected based on the required explosion-proof rating. The housing 1 itself is identical to existing technology and will not be described in detail. The housing 1 includes transparent portions, namely the display window 1b and input area 1a. To achieve transparency, an opening can be provided in the housing 1, which can then be inlaid with a glass cover 6b. The display window 1b and input area 1a can be formed from a single piece of glass cover 6b or two separate glass cover panels 6b.

[0042] The light source 4a is a laser emitter, or infrared light can be used. The photosensitive element 4b is a photodiode.

[0043] The button 5 is a button 5 that is movably mounted on the outer surface of the box 1 and can move up and down. The button 5 includes a pressed state and a pop-up state. In this application, it is necessary to reflect the light beam 8 when the button 5 is pressed, and not reflect the light beam 8 when the button 5 is popped up. The implementation method can be to make the light and the moving path of the button 5 form a certain angle. When the button 5 is pressed, the bottom of the button 5 intersects with the light, and the light shines on the bottom of the button 5 and is reflected by the reflective part at the bottom of the button 5. When the button 5 is popped up, the light no longer shines on the bottom of the button 5. However, a disadvantage of this method is that because the light and the axis of the button 5 have an angle, the distance between the light source 4a and the photosensitive element 4b will be relatively far. This application provides another solution of setting a light-shielding body 7 under the button 5, which will be introduced later.

[0044] In order to ensure that the button 5 bounces up normally, a spring 9 is provided on the button 5 , and the spring 9 bounces the button 5 upward.

[0045] If the button 5 is installed on the outer wall of the box body 1, a blind hole or a mounting slot needs to be provided even if a through hole is not provided on the box body 1. Moreover, the button 5 is provided at the position of the transparent glass cover plate 6b, which is inconvenient for the installation of the button 5.

[0046] So if Figure 3 As shown in FIG, a mounting base 6 is provided on the surface of the housing 1. The mounting base 6 defines key 5 holes corresponding to the keys 5. The keys 5 have outwardly facing flanges. When the keys 5 are in the raised state, the flanges press against and engage the mounting base 6. The flanges prevent the keys 5 from falling off. The mounting base 6 includes a base 6a and a cover 6b. The base 6a defines through holes corresponding to the keys 5. The shafts 5b of the keys 5 slide within the through holes of the base 6a. The cover 6b defines key 5 holes. The key caps 5a of the keys 5 engage the key 5 holes of the cover 6b.

[0047] In order to install the light shielding body 7, the mounting seat 6 is arranged in the input area 1a of the box body 1, and a gap is reserved between the base 6a and the input area 1a.

[0048] like Figure 4 As shown in FIG, a light shield 7 is provided at the bottom of the button 5. When the button 5 is in the up position, the light shield 7 blocks and absorbs the light beam 8 emitted by the light source 4a. When the button 5 is pressed, the bottom of the button 5 pushes the light shield 7 away to align with the light beam 8. Specifically, the light shield 7 is an elastic membrane fixed to the bottom of the button 5, and has multiple radial cuts on the light shield 7. This forms multiple fan-shaped or triangular light-shielding petals on the light shield 7.

[0049] Figure 4The middle button 5 shows that when it is pressed, shaft 5b pushes open the light-shielding flaps on light-shielding body 7, causing them to elastically deform under the force. This exposes shaft 5b, allowing light to strike the bottom of shaft 5b and be reflected by the reflective element there. The pushed-open light-shielding flaps now cling tightly to the circumference of shaft 5b.

[0050] When button 5 is released, spring 9 pushes it upward, causing shaft 5b to retract. At this point, the light shielding flaps of light shield 7 elastically recover and re-cover shaft 5b. Light then shines on light shield 7, which is made of a highly light-absorbing material or has a light-absorbing coating on its surface.

[0051] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0052] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0053] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. Punch-free programmable intelligent explosion-proof box, characterized by: The explosion-proof box body comprises an input area (1a) and a display window (1b) on the explosion-proof box body, the input area (1a) and the display window (1b) are made of transparent material, a controller (2) is arranged in the explosion-proof box body, and the controller (2) is electrically connected to the input system and the display (3). The display (3) is arranged in the box (1) and faces the display window (1b); The input system is arranged in an input area (1a) of the explosion-proof box body, and comprises a circuit board (4) installed in the box body (1), and a plurality of buttons (5) installed on the outer surface of the box body (1), and a photoelectric recognition unit corresponding to each button (5) is arranged on the circuit board (4); The key (5) includes a key cap (5a) and a shaft (5b), the shaft (5b) is movably mounted on the box wall, and the bottom surface of the shaft (5b) has a reflective portion; the photoelectric recognition unit includes a light source (4a) and a photosensitive element (4b); when the key (5) is pressed, the light beam (8) emitted by the light source (4a) is aligned with the reflective portion at the bottom of the shaft (5b), and the light beam (8) is reflected by the reflective portion and recognized by the photosensitive element (4b); A light shielding body (7) is provided at the bottom of the button (5). When the button (5) is in the pop-up state, the light shielding body (7) blocks and absorbs the light beam (8) emitted by the light source (4a); When the button (5) is pressed, the bottom of the button (5) pushes open the light shielding body (7) and aligns the light beam (8).

2. The punch-free programmable intelligent explosion-proof box according to claim 1 is characterized in that: A spring (9) is provided on the button (5), and the spring (9) bounces the button (5) upward.

3. The punch-free programmable intelligent explosion-proof box according to claim 2, characterized in that: A mounting seat (6) is provided on the surface of the box body (1), and a button (5) hole corresponding to the button (5) is provided on the mounting seat (6). The button (5) has an outward flange, and when the button (5) is in a pop-up state, the flange is pressed tightly and clamped on the mounting seat (6).

4. The punch-free programmable intelligent explosion-proof box according to claim 3 is characterized in that: The mounting base (6) comprises a base (6a) and a cover plate (6b); the base (6a) is provided with through holes corresponding to the keys (5) one by one; the shaft (5b) of the key (5) is slidably arranged in the through hole of the base (6a); the cover plate (6b) is provided with a key (5) hole; the key cap (5a) of the key (5) is clamped on the key (5) hole of the cover plate (6b).

5. The punch-free programmable intelligent explosion-proof box according to claim 4, characterized in that: The mounting seat (6) is arranged in the input area (1a) of the box body (1), and a gap is reserved between the base (6a) and the input area (1a).

6. The punch-free programmable intelligent explosion-proof box according to claim 3, characterized in that: The light shielding body (7) is an elastic membrane fixed below the bottom of the key (5), and a plurality of cuts are radially opened on the light shielding body (7).

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