PLC touch screen all-in-one machine

Abstract

The utility model discloses a PLC (Programmable Logic Controller) touch screen all-in-one machine, which relates to the technical field of industrial automation control equipment and comprises a front shell, a touch screen assembly, a mainboard, a rear shell and a rear cover, a mounting space is defined by the front shell, and a first opening and a second opening are formed in the front side and the rear side of the front shell correspondingly. The touch screen assembly is detachably connected with the front shell, and the touch screen assembly seals the first opening; the main board is detachably connected in the mounting space, and the rear side of the main board is provided with a pin header interface; the rear shell is detachably connected with the front shell, the rear shell seals the second opening, and a through hole is formed in the position, corresponding to the pin header interface, of the rear shell; the pin header interface can extend into the through hole; the rear cover comprises a cover plate and a mounting frame, the mounting frame is arranged on the front side of the cover plate, the mounting frame can extend into the through hole and is detachably connected with the hole wall of the through hole, and the cover plate seals the through hole. The PLC touch screen all-in-one machine provided by the utility model is convenient for function expansion and better in universality.

Description

Technical Field

[0001] This utility model relates to the field of industrial automation control equipment technology, and in particular to a PLC touch screen all-in-one machine. Background Technology

[0002] Currently, programmable logic controllers (PLCs) and touch screen displays are commonly used as core control components in the field of industrial automation control. The front and rear shells of current PLC-touch screen all-in-one machines are typically fixed with fasteners, resulting in complex installation. Furthermore, their modules are pre-configured at the factory, leading to poor versatility. Utility Model Content

[0003] The main purpose of this utility model is to propose a PLC touch screen all-in-one machine, which aims to solve the technical problems of complex structure and poor versatility of existing PLC touch screen all-in-one machines.

[0004] To achieve the above objectives, this utility model proposes a PLC touch screen all-in-one machine, comprising:

[0005] The front shell encloses an installation space, and the front and rear sides of the front shell are respectively provided with a first opening and a second opening communicating with the installation space;

[0006] A touchscreen assembly, wherein the touchscreen assembly is detachably connected to the front housing, and the touchscreen assembly closes the first opening;

[0007] The motherboard is detachably connected to the installation space, the touch screen assembly is electrically connected to the motherboard, and a pin header interface is provided on the rear side of the motherboard.

[0008] The rear shell is detachably connected to the front shell, and the rear shell closes the second opening. The rear shell has a through hole corresponding to the position of the pin header interface. The front side of the rear shell is in contact with the motherboard, and the pin header interface can extend into the through hole.

[0009] The rear cover includes a cover plate and a mounting frame. The mounting frame is disposed on the front side of the cover plate and can extend into the through hole and be detachably connected to the hole wall of the through hole. The cover plate closes the through hole.

[0010] In one embodiment, a first buckle is provided on the outer side wall of the mounting frame, and a slot is provided on the hole wall corresponding to the position of the first buckle, so that the first buckle can extend into the slot and engage with the slot.

[0011] In one embodiment, the two outer side walls of the mounting frame, which are arranged opposite each other at different angles, are provided with a plurality of first buckles that are spaced apart from each other on the left and right. The number of buckles is the same as the number of slots and they are engaged one-to-one.

[0012] In one embodiment, the two outer side walls of the mounting frame, which are arranged opposite to each other, are provided with a plurality of vertically spaced sliding grooves, and each sliding groove extends in the front-back direction. The hole wall is provided with a plurality of sliding rails, and the number of sliding rails is the same as that of the sliding grooves and they are arranged in a one-to-one correspondence. Each sliding rail can slide and engage with the corresponding sliding groove when the mounting frame is inserted into the through hole.

[0013] In one embodiment, the rear shell is provided with a second buckle extending forward, and the front shell is provided with a locking hole corresponding to the position of the second buckle, and the second buckle engages with the locking hole.

[0014] In one embodiment, the motherboard has long sides on the top and bottom, and short sides on the left and right. A plurality of input interfaces and a plurality of output interfaces are respectively provided on the rear side of the motherboard near the two long sides. The pin header is located between the input interfaces and the output interfaces. The rear cover has a first clearance hole corresponding to each input interface, allowing the input interface to protrude outside the mounting space. The rear cover also has a second clearance hole corresponding to each output interface, allowing the output interface to protrude outside the mounting space.

[0015] In one embodiment, the touchscreen assembly includes a protective film, a touchscreen, and a display screen. The touchscreen is snapped into the first opening and closes the first opening. The protective film is attached to the front side of the front shell and covers the touchscreen. The display screen is disposed within the mounting space. Both the touchscreen and the display screen are electrically connected to the motherboard.

[0016] In one embodiment, the front shell includes a base plate and a surrounding plate disposed on the rear side of the base plate. The surrounding plate and the base plate together form the mounting space. The base plate has the first opening. A limiting member is provided on the inner side wall of the surrounding plate. The base plate and the limiting member are spaced apart to form an annular limiting groove that surrounds the inner wall of the surrounding plate. The edge of the display screen can extend into and be confined within the limiting groove. The main board abuts against the rear end of the limiting member. There is a gap between the main board and the display screen.

[0017] In one embodiment, the limiting member includes a plurality of limiting protrusions, which are spaced apart along the inner wall of the enclosure. The front end of each limiting protrusion is spaced apart from the substrate to form the annular limiting groove with the substrate, and the edge of the main board abuts against the rear end of the limiting protrusion.

[0018] In one embodiment, a fixing buckle is also provided in the installation space. The fixing buckle includes a connecting section and a fixing section that are connected to each other. The connecting section is detachably connected to the substrate. The side of the fixing section facing the substrate forms a clamping gap with the substrate, and the edge of the display screen is inserted into the clamping gap.

[0019] This utility model discloses a PLC touch screen all-in-one machine. By detachably connecting the touch screen component, motherboard, and rear cover to the front cover, it facilitates the installation and disassembly of the PLC touch screen all-in-one machine. The structure is simple to install. The motherboard is set in the installation space, and the touch screen component and rear cover respectively close the first and second openings, effectively preventing dust and other contaminants from entering the installation space, protecting the motherboard from damage, and facilitating normal motherboard operation. Furthermore, a pin header interface is provided on the rear side of the motherboard, and a through hole is provided on the rear cover corresponding to the pin header mechanism, allowing the pin header interface to be exposed through the through hole. This facilitates connection of the pin header interface to external devices or function expansion modules, thereby further improving the versatility and functional diversity of the PLC touch screen all-in-one machine. Additionally, the rear cover, facing the front of the motherboard, fits snugly against the motherboard, preventing other electronic components on the motherboard except for the pin header interface from being exposed outside the through hole, providing good protection. When the pin header interface is not needed, the through hole can be closed by connecting the rear cover to the rear cover, further preventing external environmental interference to the pin header interface. Compared with existing technologies, the PLC touch screen all-in-one machine of this utility model has a detachable back cover on the rear shell to facilitate the exposure of the pin header interface. This not only facilitates functional expansion and improves functional diversity and versatility, but also allows the pin header interface to be covered by the back cover when not in use, thus protecting the pin header interface and improving reliability. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of an embodiment of the PLC touch screen all-in-one machine provided by this utility model;

[0022] Figure 2 An exploded view of the structure of an embodiment of the PLC touch screen all-in-one machine provided by this utility model;

[0023] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0024] Figure 4 for Figure 2 A magnified view of a section at point B in the middle;

[0025] Figure 5 An exploded view of the structure of yet another embodiment of the PLC touch screen all-in-one machine provided by this utility model;

[0026] Figure 6 This is a schematic diagram of the fixing buckle in one embodiment of the PLC touch screen all-in-one machine provided by this utility model.

[0027] Explanation of icon numbers:

[0028] 100. PLC Touch Screen All-in-One Machine; 1. Front Housing; 11. Installation Space; 12. First Opening; 13. Second Opening; 13. Base Plate; 14. Enclosure; 15. Snap Hole; 16. Limiting Component; 17. Limiting Groove; 2. Touch Screen Assembly; 21. Protective Film; 22. Touch Screen; 23. Display Screen; 24. Sealing Ring; 3. Main Board; 31. Pin Header Interface; 32. Input Interface; 33. Output Interface; 4. Rear Housing; 41. Through Hole; 411. Snap Slot; 412. Slide Rail; 42. First Clearance Hole; 43. Second Clearance Hole; 5. Rear Cover; 51. Cover Plate; 52. Mounting Frame; 521. First Buckle; 522. Slide Groove; 6. Fixing Buckle; 61. Connecting Section; 62. Fixing Section.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] This utility model proposes a PLC touch screen all-in-one machine.

[0034] Please see Figure 1 , Figure 2 and Figure 5 In one embodiment of this utility model, the PLC touch screen all-in-one machine includes a front shell 1, a touch screen assembly 2, a motherboard 3, a rear shell 4, and a rear cover 5; the front shell 1 forms an installation space 11, and the front and rear sides of the front shell 1 are respectively provided with a first opening 12 and a second opening 13 communicating with the installation space 11; the touch screen assembly 2 is detachably connected to the front shell 1, and the touch screen assembly 2 closes the first opening 12; the motherboard 3 is detachably connected to the installation space 11, and the touch screen assembly 2 is electrically connected to the motherboard 3. The rear side of the 3 is provided with a pin header interface 31; the rear shell 4 is detachably connected to the front shell 1, and the rear shell 4 closes the second opening 13. The rear shell 4 has a through hole 41 at the position corresponding to the pin header interface 31; the front side of the rear shell 4 is in close contact with the main board 3, and the pin header interface 31 can extend into the through hole 41; the rear cover 5 includes a cover plate 51 and a mounting frame 52. The mounting frame 52 is located on the front side of the cover plate 51, and the mounting frame 52 can extend into the through hole 41 and is detachably connected to the hole wall of the through hole 41. The cover plate 51 closes the through hole 41.

[0035] This utility model discloses a PLC touch screen all-in-one machine. By detachably connecting the touch screen component 2, the main board 3, and the rear shell 4 to the front shell 1, the installation and disassembly of the PLC touch screen all-in-one machine are facilitated. The main board 3 is disposed within the installation space 11. The touch screen component 2 and the rear shell 4 respectively close the first opening 12 and the second opening 13, effectively preventing dust and other contaminants from entering the installation space 11 and affecting the normal operation of the main board 3. A pin header interface 31 is provided on the rear side of the main board 3, and a through hole 41 is provided on the rear shell 4 corresponding to the position of the pin header mechanism, allowing the pin header to pass through. The pin header interface 31 can be exposed through the through hole 41, facilitating connection of the pin header interface 31 to external devices or function expansion modules, thereby further improving the versatility and functionality of the PLC touch screen all-in-one machine. Furthermore, the rear cover 5, facing the front of the main board 3, fits snugly against the main board 3, preventing other electronic components on the main board 3, except for the pin header interface 31, from being exposed outside the through hole 41, providing good protection. When the pin header interface 31 is not needed, the through hole 41 can be closed by connecting the rear cover 5 to the rear shell 4, further preventing external environmental interference to the pin header interface 31. Compared to existing technologies, the PLC touch screen all-in-one machine of this invention features a detachable rear cover 5 on the rear shell 4, which facilitates the exposure of the pin header interface 31, improving functional expansion, enhancing functional diversity, and improving versatility. When the pin header interface 31 is not in use, the rear cover 5 can also cover it for protection, resulting in better reliability.

[0036] It should be noted that the mainboard 3 is equipped with a PLC control unit, which is responsible for logic control and data processing.

[0037] like Figure 1 As shown, the front-back, left-right, and up-down directions are all within... Figure 1 As shown in the image.

[0038] Please see Figure 3 In one embodiment, a first buckle 521 is provided on the outer side wall of the mounting frame 52, and a slot 411 is provided on the hole wall corresponding to the position of the first buckle 521. The first buckle 521 can extend into the slot 411 and engage with the slot 411.

[0039] In this embodiment, the mounting frame 52 can be quickly snapped into the through hole 41 by the cooperation of the buckle and the slot 411, without the need for tools or complicated operations, which significantly simplifies the installation and disassembly process and improves the installation efficiency of the back cover 5; and the snap-fit ​​method of the buckle and the slot 411 can provide a firm connection, ensuring a tight fit between the mounting frame 52 and the hole wall of the through hole 41, preventing the back cover 5 from loosening or falling off, and enhancing the overall stability of the equipment.

[0040] In one embodiment, multiple first buckles 521 are provided on both outer side walls of the mounting frame 52, which are arranged vertically and horizontally. The number of buckles and slots 411 are the same and they are engaged one-to-one. In this embodiment, by providing multiple buckles and slots 411 to cooperate, the connection force can be evenly distributed, which significantly improves the connection stability between the mounting frame 52 and the wall of the through hole 41, and prevents the back cover 5 from loosening under vibration or impact.

[0041] Specifically, two first buckles 521 are respectively provided on the upper and lower outer side walls.

[0042] In one embodiment, the two outer side walls of the mounting frame 52, which are arranged opposite to each other, are provided with a plurality of vertically spaced sliding grooves 522, and each sliding groove 522 extends in the front-back direction. The hole wall is provided with a plurality of sliding rails 412, and the number of sliding rails 412 is the same as that of sliding grooves 522 and they are arranged in a one-to-one correspondence. Each sliding rail 412 can slide and engage with the corresponding sliding groove 522 when the mounting frame 52 is inserted into the through hole 41.

[0043] Understandably, the sliding fit between the slide rail 412 and the slide groove 522 provides a clear guide for the installation of the mounting frame 52, ensuring that the mounting frame 52 can be accurately and smoothly inserted into the through hole 41, avoiding offset or misalignment during the installation process and improving installation accuracy; furthermore, the tight fit between the slide rail 412 and the slide groove 522 makes the contact between the mounting frame 52 and the wall of the through hole 41 more compact, reducing gaps, thereby improving the sealing of the equipment and preventing dust, liquids, etc. from entering the interior.

[0044] Specifically, two sliding grooves 522 are respectively provided on the two opposite outer walls.

[0045] As an optional implementation, the positions of the slide groove 522 and the slide rail 412 can be interchanged, that is, the slide groove 522 is provided on the wall of the through hole 41, and the slide rail 412 is provided on the two opposite outer walls of the mounting frame 52.

[0046] Please see Figure 2 In one embodiment, a second buckle (not shown) extending forward is provided on the rear shell 4, and a buckle hole 15 is provided on the front shell 1 at the position corresponding to the second buckle, and the second buckle engages with the buckle hole 15.

[0047] Understandably, the snap-fit ​​design of the second buckle and the snap-fit ​​hole 15 allows the connection between the rear shell 4 and the front shell 1 to be completed quickly without the need for tools or complicated operations, which significantly simplifies the installation and disassembly process and improves operational efficiency. The snap-fit ​​method of the second buckle and the snap-fit ​​hole 15 can provide a firm connection, ensuring a tight fit between the rear shell 4 and the front shell 1, preventing loosening or falling off, and enhancing the overall stability of the PLC touch screen all-in-one machine.

[0048] Specifically, the rear shell 4 has second buckles on both the upper and lower sides.

[0049] In one embodiment, the top and bottom sides of the motherboard 3 are both long sides, and the left and right sides are both short sides. A plurality of input interfaces 32 and a plurality of output interfaces 33 are respectively provided on the rear side of the motherboard 3 near the two long sides. The pin header interface 31 is located between the input interfaces 32 and the output interfaces 33. The rear cover 4 has a first clearance hole 42 for the input interface 32 to be exposed outside the mounting space 11 at the position corresponding to each input interface 32. The rear cover 4 has a second clearance hole 43 for the output interface 33 to be exposed outside the mounting space 11 at the position corresponding to each output interface 33.

[0050] Understandably, the input interface 32 and output interface 33 are positioned close to the two long sides of the motherboard 3, resulting in a reasonable structural arrangement. The input interface 32 and output interface 33 are concentrated on both sides of the motherboard 3, while the pin header interface 31 is located in the middle, achieving functional partitioning. This facilitates quick identification and differentiation of the uses of different interfaces, improving ease of use. Furthermore, the input interface 32 and output interface 33 are exposed through clearance holes on the rear cover 4, making the connection of external devices more convenient and reducing the complexity and difficulty of wiring.

[0051] Understandably, the input interface 32 includes a digital input interface 32 and an analog input interface 32, and the output interface 33 includes a digital output interface 33 and an analog output interface 33.

[0052] In one embodiment, the touch screen assembly 2 includes a protective film 21, a touch screen 22, and a display screen 23. The touch screen 22 is snapped into the first opening 12 and closes the first opening 12. The protective film 21 is attached to the front side of the front shell 1 and covers the touch screen 22. The display screen 23 is disposed in the mounting space 11. Both the touch screen 22 and the display screen 23 are electrically connected to the motherboard 3.

[0053] Understandably, the protective film 21 covers the surface of the touch screen 22, which can effectively prevent the touch screen 22 from being scratched or worn, and the protective film 21 can also further prevent external dust and other objects from entering the installation space 11.

[0054] Please see Figure 2 and Figure 4 In one embodiment, the front shell 1 includes a substrate 13 and a surrounding plate 14 disposed on the rear side of the substrate 13. The surrounding plate 14 and the substrate 13 together form an installation space 11. The substrate 13 has a first opening 12. A limiting member 16 is provided on the inner side wall of the surrounding plate 14. The substrate 13 and the limiting member 16 are spaced apart to form an annular limiting groove 17 that surrounds the inner wall of the surrounding plate 14. The edge of the display screen 23 can extend into and be limited in the limiting groove 17. The main board 3 abuts against the rear end of the limiting member 16. There is a gap between the main board 3 and the display screen 23.

[0055] In this embodiment, by providing a limiting member 16 on the inner sidewall of the enclosure 14, and forming a limiting groove 17 between the limiting member 16 and the substrate 13, the edge of the display screen 23 extends into the annular limiting groove 17 and is limited, ensuring the stable fixation of the display screen 23 within the installation space 11, and preventing the display screen 23 from shifting or loosening due to vibration or impact during the operation of the PLC touch screen all-in-one machine; the main board 3 abuts against the rear end of the limiting member 16, and there is a gap between the main board 3 and the display screen 23, avoiding direct contact between the main board 3 and the display screen 23, reducing the impact of the heat generated by the main board 3 during operation on the display screen 23, and improving the reliability of the equipment.

[0056] Specifically, the limiting member 16 includes multiple limiting protrusions, which are spaced apart along the inner wall of the surrounding plate. The front end of each limiting protrusion is spaced apart from the base plate 13 to form an annular limiting groove 17 with the base plate 13. The edge of the main plate 4 abuts against the rear end of the limiting protrusion. Understandably, the multiple limiting protrusions constitute the limiting member 16, reducing the installation space occupied 11, resulting in a simple and compact structure and achieving a lightweight design.

[0057] Please see Figure 1 and Figure 6 In one embodiment, a fixing buckle 6 is also provided in the installation space 11. The fixing buckle 6 includes a connecting section 61 and a fixing section 62 that are connected to each other. The connecting section 61 is detachably connected to the substrate 13. The side of the fixing section 62 facing the substrate 13 forms a clamping gap with the substrate 13, and the edge of the display screen 23 is inserted into the clamping gap.

[0058] Understandably, the edge of the display screen 23 is inserted into the clamping gap, and the clamping action of the fixing buckle 6 makes the display screen 23 more stable in the installation space 11, preventing the display screen 23 from shifting or loosening due to vibration or impact; and the fixing buckle 6 reduces the difficulty of installation and disassembly.

[0059] Please see Figure 2 In one embodiment, the protective film 21 and the substrate 13 are sealed together by a sealing ring 24. The sealing ring 24 can effectively prevent dust, liquid or other contaminants from entering the installation space 11 from the gap between the protective film 21 and the substrate 13, which significantly improves the protection level and enables it to adapt to more complex or harsh working environments.

[0060] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A PLC touch screen all-in-one machine, characterized in that, include: The front shell encloses an installation space, and the front and rear sides of the front shell are respectively provided with a first opening and a second opening communicating with the installation space; A touchscreen assembly, wherein the touchscreen assembly is detachably connected to the front housing, and the touchscreen assembly closes the first opening; The motherboard is detachably connected to the installation space, the touch screen assembly is electrically connected to the motherboard, and a pin header interface is provided on the rear side of the motherboard. The rear shell is detachably connected to the front shell, and the rear shell closes the second opening. The rear shell has a through hole corresponding to the position of the pin header interface. The front side of the rear shell is in contact with the motherboard, and the pin header interface can extend into the through hole. The rear cover includes a cover plate and a mounting frame. The mounting frame is disposed on the front side of the cover plate and can extend into the through hole and be detachably connected to the hole wall of the through hole. The cover plate closes the through hole.

2. The PLC touch screen all-in-one machine as described in claim 1, characterized in that, A first buckle is provided on the outer side wall of the mounting frame, and a slot is provided on the hole wall corresponding to the position of the first buckle, so that the first buckle can extend into the slot and engage with the slot.

3. The PLC touch screen all-in-one machine as described in claim 2, characterized in that, The mounting frame has multiple first buckles spaced apart on its two opposite outer side walls. The number of buckles is the same as the number of slots, and they are engaged one-to-one.

4. The PLC touch screen all-in-one machine as described in claim 2, characterized in that, The mounting frame has multiple vertically spaced sliding grooves on its two opposite outer side walls, and each sliding groove extends in the front-to-back direction. The hole wall has multiple slide rails, and the number of slide rails is the same as the number of sliding grooves and they are arranged in a one-to-one correspondence. Each slide rail can slide and engage with the corresponding sliding groove when the mounting frame is inserted into the through hole.

5. The PLC touch screen all-in-one machine as described in claim 2, characterized in that, The rear shell is provided with a second buckle extending forward, and the front shell is provided with a locking hole corresponding to the position of the second buckle, and the second buckle engages with the locking hole.

6. The PLC touch screen all-in-one machine as described in any one of claims 1 to 5, characterized in that, The motherboard has long sides on the top and bottom, and short sides on the left and right. Several input interfaces and several output interfaces are respectively provided on the rear side of the motherboard near the two long sides. The pin header interface is located between the input interfaces and the output interfaces. The rear cover has a first clearance hole for each input interface to be exposed outside the mounting space, and a second clearance hole for each output interface to be exposed outside the mounting space.

7. The PLC touch screen all-in-one machine as described in any one of claims 1 to 5, characterized in that, The touchscreen assembly includes a protective film, a touchscreen, and a display screen. The touchscreen is snapped into the first opening and closes the first opening. The protective film is attached to the front side of the front shell and covers the touchscreen. The display screen is disposed within the mounting space. Both the touchscreen and the display screen are electrically connected to the motherboard.

8. The PLC touch screen all-in-one machine as described in claim 7, characterized in that, The front shell includes a base plate and a surrounding plate disposed on the rear side of the base plate. The surrounding plate and the base plate together form the mounting space. The base plate has the first opening. A limiting member is provided on the inner side wall of the surrounding plate. The base plate and the limiting member are spaced apart to form an annular limiting groove that surrounds the inner wall of the surrounding plate. The edge of the display screen can extend into and be confined in the limiting groove. The main board abuts against the rear end of the limiting member. There is a gap between the main board and the display screen.

9. The PLC touch screen all-in-one machine as described in claim 8, characterized in that, The limiting member includes multiple limiting protrusions, which are spaced apart along the inner wall of the enclosure. The front end of each limiting protrusion is spaced apart from the substrate to form the annular limiting groove with the substrate. The edge of the main board abuts against the rear end of the limiting protrusion.

10. The PLC touch screen all-in-one machine as described in claim 8, characterized in that, The installation space is also provided with a fixing buckle, which includes a connecting section and a fixing section that are connected to each other. The connecting section is detachably connected to the substrate. The side of the fixing section facing the substrate forms a clamping gap with the substrate, and the edge of the display screen is inserted into the clamping gap.

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