Capacitive display screen explosion-proof box

Abstract

The utility model belongs to the field of explosion-proof boxes, and particularly relates to an explosion-proof box for a capacitive display screen. A capacitor display screen explosion-proof box comprises a front box body and a rear box body, the front box body is hinged to the rear box body, the front box body and the rear box body are both recessed inwards, an installation cavity is formed between the front box body and the rear box body, the front box body is a rectangular frame defined by four side edges, a screen area is formed in the middle of the rectangular frame, and the screen area is provided with an opening. The position where the front box body is connected with the screen area is of a step structure, an adhesive layer is arranged on the step structure, and a sealing strip is arranged on the front box body. The rear box body comprises four side edges and a back plate connected with the side edges, a fixing table protruding towards the direction of the installation cavity is arranged on the back plate, threads are preset in the fixing table, and a wire outlet hole is further formed in the rear box body. The explosion-proof box for the capacitive display screen is reasonable in structural design, practical in layout and attractive in appearance, and man-machine interaction can be freely achieved on the premise that the explosion-proof requirement is met.

Description

Technical Field

[0001] The utility model belongs to the field of explosion-proof boxes, in particular to an explosion-proof box for a capacitive display screen. Background Art

[0002] Resistive screens are more common in the industrial field because of their low requirements for the operating environment. However, when they are used in explosion-proof equipment, in order to meet the explosion-proof grade requirements, explosion-proof glass needs to be installed on the outside of the resistive screen. However, after the explosion-proof glass is installed, the resistive screen loses its touch function. The patent with announcement number: CN 211090282U discloses a touch screen explosion-proof box, which is also widely used now. The resistive screen is placed in the explosion-proof box, and explosion-proof glass is used as a viewing window in front of the touch screen to observe the parameters displayed by the resistive screen. In order to facilitate human-computer interaction, an explosion-proof mouse is added to the box to facilitate the modification or setting of device parameters. Obviously, touch operation is still not possible in this way.

[0003] Capacitive screens can also be touched even with explosion-proof glass installed on the outside. Based on this, our company has designed a conversion circuit for capacitive screens and resistive screens, which can convert touch operations on capacitive screens into command signals that can be executed by existing resistive touch screen devices. In order to adapt to the capacitive screen and its conversion circuit, it is necessary to develop an explosion-proof box for capacitive display screens. Utility Model Content

[0004] The utility model aims to overcome the deficiencies in the prior art and provide an explosion-proof box for a capacitive display screen, which has a reasonable structural design, a practical layout and is beautiful.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a capacitive display explosion-proof box, comprising a front box body and a rear box body, the front box body and the rear box body are hinged, the front box body and the rear box body are both recessed inward, and an installation cavity is formed between the two, the front box body is a rectangular frame surrounded by four sides, and a screen area is formed in the middle of the rectangular frame, the position where the front box body is connected to the screen area is a step structure, an adhesive layer is arranged on the step structure, and a sealing strip is arranged on the front box body.

[0006] The rear box body includes four side edges and a back plate connecting the side edges. A fixing platform protruding toward the installation cavity is arranged on the back plate. A thread is preset in the fixing platform. A wire outlet hole is also arranged on the rear box body.

[0007] Preferably, mounting holes are provided on the front box body and the rear box body, and the side edges of the front box body protrude toward the center at the locations of the mounting holes to form a protective gap.

[0008] Preferably, the sealing strip is arranged along the inner side edge of the front box body.

[0009] Preferably, a circuit fixing hole is provided in the front box body.

[0010] The beneficial effects of the utility model are:

[0011] 1. A hollow area is reserved in the middle of the front box as the screen area. Its size is adapted to the size of the display screen. The display screen can be placed exactly in the screen area and used as a human-computer interaction interface. The position where the front box and the screen area are connected is a step structure. In order to match the step structure in the middle of the front box, the edge of the display screen is also designed to match it. The two are closely matched. On the one hand, the fixation is more firm. On the other hand, the outer edge of the screen and the inner side of the side of the front box have a smooth transition, which is more beautiful. An adhesive layer is provided on the step structure. The adhesive layer contains 3M adhesive. The display screen is firmly fixed on the front box, and the user can operate the device through touch operation.

[0012] 2. A sealing strip is arranged on the front box body, and the sealing strip is arranged along the inner side of the front box body, which has a better sealing effect and can prevent water vapor, dust, etc. from entering.

[0013] 3. Mounting holes are provided on the front box and the rear box, and the side of the front box protrudes toward the center at the location of the mounting holes to form a protective gap to ensure the reliability and safety of the equipment.

[0014] 4. A fixing platform protruding toward the installation cavity is provided on the back plate, and a thread is preset in the fixing platform to realize the connection between the explosion-proof box and the original production equipment. The upper part of the fixing platform is closed to ensure that the bolts connecting the explosion-proof box and the original production equipment will not extend into the installation cavity, and the overall safety of the box is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the front box in the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the rear box in the utility model;

[0018] Figure 4 It is a schematic diagram of the internal structure of the utility model.

[0019] Reference numerals:

[0020] 1. Front box; 2. Rear box; 3. Screen area; 4. Display screen; 5. Installation cavity; 6. Step structure; 7. Adhesive layer; 8. Installation hole; 9. Protective gap; 10. Sealing strip; 11. Circuit fixing hole; 12. Fixing platform; 13. Wire outlet hole. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the structure of the utility model.

[0022] like Figure 1 As shown, a capacitive display explosion-proof box includes a front box body 1 and a rear box body 2, wherein the front box body 1 and the rear box body 2 are hinged, the front box body 1 is a rectangular frame surrounded by four sides, and a screen area 3 is formed in the middle of the rectangular frame. The size of the screen area 3 is adapted to the size of the capacitive display screen 4, and the display screen is placed in this position to facilitate human-computer interaction.

[0023] like Figure 4 As shown, the front box body 1 and the rear box body 2 are both recessed inwards, forming a mounting cavity 5 therebetween, and the display screen 4 and its circuit structure part are fixed in the mounting cavity 5 and fixed by adhesive or screws.

[0024] like Figures 2 to 4 As shown, the position where the front box body 1 is connected to the screen area 3 is a step structure 6, and an adhesive layer 7 is provided on the step structure 6. Mounting holes 8 are provided on the front box body 1 and the rear box body 2, and the side of the front box body 1 protrudes toward the center at the position of the mounting hole 8 to form a protective gap 9. In order to achieve the explosion-proof function, the box body is made of metal alloy as a whole, and each mounting hole 8 is provided with a protective gap 9, so the inner edge of the side of the front box body 1 is not a straight straight line shape, but a shape protruding inward at the position of each mounting hole 8. Correspondingly, the sealing strip 10 is designed completely along the inner edge of the side of the front box body 1, which increases the sealing effect on the one hand and is more beautiful on the other.

[0025] Circuit fixing holes 11 are also provided inside the front box body 1 , and these circuit fixing holes 11 are convenient for fixing the circuit board therein.

[0026] like Figure 3 and Figure 4 As shown, the rear box body 2 includes four side edges and a back plate connecting the side edges. A fixing platform 12 protruding toward the installation cavity 5 is provided on the back plate. A thread is preset in the fixing platform 12. A wire outlet hole is also provided on the rear box body 2.

[0027] The entire box is connected to the original production equipment through the fixing platform 12 on the rear box 2, and the bolts are directly fixed in the fixing platform 12. Compared with the method of directly opening fixing holes on the back plate of the rear box 2 to fix the bolts, it is obvious that the method of fixing with the fixing platform 12 in this application is more sealed and safer, thereby improving the overall explosion-proof capability of the box.

[0028] A wire outlet hole 13 is also provided on the rear box body 2 to facilitate the connection of the line with the outside world. In order to improve its sealing and safety, a sealing gasket can be added after the wire outlet is completed.

[0029] The method of using the utility model is as follows: the front box 1 and the rear box 2 are both recessed inwards, and a mounting cavity 5 is formed between the two, and the display screen and the circuit structure are placed in the mounting cavity 5. The explosion-proof glass and the display screen of the capacitive screen are placed in the screen area 3 in the middle of the front box 1, the display screen and the step structure 6 of the front box 1 are fixed by the adhesive layer 7, and the circuit board part is fixedly connected through the circuit fixing hole 11 set in the front box 1, and then the front box 1 and the rear box 2 are fixed by screws through the mounting hole 8. The front box 1 and the rear box 2 are hinged, and after the screws between the front box 1 and the rear box 2 are removed, the front box 1 can be opened and closed.

[0030] The utility model is applied to the outside of the external capacitive display screen. Since the capacitive display screen uses the current induction of the human body to work, when the outside is covered with a layer of explosion-proof glass that meets the requirements, it does not affect the induction of the touch position. Therefore, the capacitive display screen covered with explosion-proof glass is placed at the reserved screen area 3 on the front box 1, and human-computer interaction can be freely realized under the premise of meeting the explosion-proof requirements.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An explosion-proof box for a capacitive display screen, comprising a front box body and a rear box body, wherein the front box body and the rear box body are hinged, both of which are concave inwards, forming an installation cavity between the two, characterized in that: The front box body is a rectangular frame surrounded by four sides, the middle of the rectangular frame forms a screen area, the position where the front box body and the screen area are connected is a step structure, an adhesive layer is arranged on the step structure, and a sealing strip is arranged on the front box body; The rear box body comprises four side edges and a back plate connecting the side edges. A fixing platform protruding toward the installation cavity is arranged on the back plate. A thread is preset in the fixing platform. A wire outlet hole is also arranged on the rear box body.

2. The explosion-proof box for a capacitive display screen according to claim 1, characterized in that: Mounting holes are arranged on the front box body and the rear box body, and the side edge of the front box body protrudes toward the center at the position of the mounting holes to form a protective gap.

3. The explosion-proof box for a capacitive display screen according to claim 1, characterized in that: The sealing strip is arranged along the inner side edge of the front box body.

4. The explosion-proof box of a capacitive display screen according to claim 2 or 3, characterized in that: A circuit fixing hole is arranged in the front box body.

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