PLC module shell, PLC module and PLC

Abstract

The invention belongs to the field of electrical equipment, and particularly provides a PLC module shell, a PLC module and a PLC. According to the shell, a hinge tooth part and an anti-falling part are arranged on a hinge shaft where a shell body and an upper cover are hinged, a pair of buckling position tooth grooves and at least one pair of overturning position tooth grooves are formed in a hinge hole, and two tooth grooves in each pair of buckling position tooth grooves are opposite to two tooth grooves in the overturning position tooth grooves in the radial direction; the buckling position is embedded into the buckling position tooth groove so that the upper cover can be kept in a buckling state, the turning-over position is embedded into the turning-over position tooth groove so that the upper cover can be suspended in a turning-over state, the anti-disengaging part comprises paired hook claws, and the hook claws are matched with the hinge hole in an anti-disengaging mode. The module and the PLC adopt the shell. And the upper cover is suspended and kept at a certain determined turning angle after being turned upwards and opened, so that the upper cover does not need to be manually supported, the hands of a worker are liberated, and the worker can conveniently carry out maintenance, wiring and other operations.

Description

Technical Field

[0001] This invention belongs to the field of electrical equipment, and in particular relates to a PLC module housing, a PLC module, and a PLC. Background Technology

[0002] A PLC (Programmable Logic Controller) is the core of an industrial automation system, primarily responsible for receiving field signals, making decisions based on preset programs, and controlling the actions of actuators. PLCs employ a modular design, comprising multiple PLC modules. Specifically, a PLC module can be divided into a CPU module and multiple sub-modules, such as power supply modules, I / O modules, and communication modules. Each module includes a housing and the electrical components housed within it. PLCs are typically mounted on equipment or production lines using DIN rails (e.g., DIN35 rails).

[0003] For example, the invention patent application with publication number CN117769196A discloses an installation device and installation method for facilitating the plugging and unplugging of PLC modules. The PLC module disclosed in this patent application can be divided into two main parts: a base part and a main body part. The electrical components of the main body part and the base part can be connected and mated by electrical connectors, and the outer shell can be fixed by a handle and a sliding buckle structure. The outer shell of the main body part includes a housing (i.e., the PLC module housing) and a top cover (i.e., the module wire cover). The top cover is generally hinged to the housing by a hinge shaft and can be flipped up to allow workers to perform maintenance, wiring, and rewiring operations on the module.

[0004] However, currently, when performing the above operations by flipping the top cover open, staff often need to manually support the top cover to keep it open and prevent it from accidentally flipping down and closing, which is very inconvenient in practice. Summary of the Invention

[0005] The purpose of this invention is to provide a PLC module housing to solve the technical problem in the prior art where the module cover needs to be opened manually, which is inconvenient for operators. Another purpose of this invention is to provide a PLC module and a PLC to solve the same technical problem.

[0006] To achieve the above objectives, the technical solution for the PLC module housing provided by this invention is as follows: A PLC module housing includes a housing and a top cover, one of which has a hinge hole and the other has a hinge shaft. The top cover can be flipped relative to the housing through the rotatable engagement of the hinge shaft and the hinge hole. The hinge shaft includes a hinge tooth portion and an anti-detachment portion. The inner wall of the hinge hole has a pair of engaging tooth grooves and at least a pair of flip-open tooth grooves. Each pair of engaging tooth grooves is radially opposite to two tooth grooves in the flip-open tooth grooves. During the rotational stroke of the hinge shaft relative to the hinge hole, the two ends of the hinge tooth portion have engaging positions that are embedded in the engaging tooth grooves to keep the top cover in a engaged state and flip-open positions that are embedded in the flip-open tooth grooves to suspend the top cover in a flip-open state. The anti-detachment portion includes a pair of hooks. Each hook has an elastic inner support section and a hooking section. The elastic inner support section supports the inner wall of the hinge hole, and the hooking section penetrates the hinge hole and hooks the end edge of the hinge hole.

[0007] As a further improvement, the anti-slip part has a pair of hooks, the two hooks in the pair are symmetrical about the extension direction of the hinge tooth part, and the line connecting the two points where the elastic inner support section of the two hooks contacts the hinge hole bisects the hinge part.

[0008] As a further improvement, a support rib is provided between the side of the elastic inner support section of the two hooks that is away from the inner support hinge hole and the hinge tooth.

[0009] As a further improvement, the side of the elastic inner support section of the two hooks that contacts the inner support of the hinge hole is provided with a protruding tooth, and there is a pair of open position tooth grooves and a fastening position tooth groove circumferentially spaced at 90 degrees, so that when the hinge tooth part is in the fastening position, the protruding tooth of the elastic inner support section can be inserted into the open position tooth groove.

[0010] As a further improvement, the inner wall of the hinge hole is provided with six pairs of tooth grooves arranged at 30-degree intervals, one pair of tooth grooves forming the engagement tooth groove and the other five pairs of tooth grooves forming the opening tooth groove.

[0011] As a further improvement, the top cover is provided with locking teeth on both sides in the width direction, and the housing is provided with locking grooves for the locking teeth to enter when the top cover is fastened. The locking teeth are provided with protrusions so that they are pressed against the locking grooves after entering them.

[0012] As a further improvement, the locking teeth are located on the inside of the top cover, and a reinforcing rib is provided between the locking teeth and the top cover.

[0013] As a further improvement, the locking teeth are provided with continuous and wavy protrusions.

[0014] This invention is an improved invention, and its beneficial effects are as follows: The hinge shaft and hinge hole configured in this invention can restrict the upper cover to a certain position through the meshing of the hinge teeth and the grooves of the hinge hole. Specifically, when the PLC module is in normal use, the two ends of the hinge teeth can be embedded in the meshing grooves to restrict the upper cover to the meshing position, thereby preventing the upper cover from being accidentally opened. When maintenance, wiring, or other operations are required, the upper cover can be manually flipped upwards, providing a flipping torque to make the two ends of the hinge teeth disengage from the meshing grooves. As the upper cover is flipped, the two ends of the hinge teeth can eventually enter the opening grooves, so that the upper cover is suspended and held in the opening position. With the cooperation of the hinge teeth and the grooves, the upper cover can remain stationary without external force. At this time, the staff does not need to manually support the upper cover, which facilitates the staff to perform maintenance, wiring, and other operations.

[0015] Meanwhile, the hook of the hinge anti-detachment part can engage with the hinge hole to prevent detachment, thereby preventing the hinge from accidentally coming out of the hinge hole when flipping the top cover, ensuring that the overall shell has high reliability.

[0016] To achieve the above objectives, the technical solution of the PLC module provided by this invention is as follows: A PLC module includes a housing and electrical components mounted on the housing. The housing includes a shell and a top cover, one of which has a hinge hole and the other has a hinge shaft. The top cover can be flipped relative to the shell through the rotatable engagement of the hinge shaft and the hinge hole. The hinge shaft includes a hinge tooth portion and an anti-detachment portion. The inner wall of the hinge hole has a pair of engaging tooth grooves and at least a pair of flip-open tooth grooves. Each pair of engaging tooth grooves is radially opposite to two tooth grooves in the flip-open tooth grooves. During the rotational stroke of the hinge shaft relative to the hinge hole, the two ends of the hinge tooth portion have engaging positions that are embedded in the engaging tooth grooves to keep the top cover in a engaged state and flip-open positions that are embedded in the flip-open tooth grooves to suspend the top cover in a flip-open state. The anti-detachment portion includes a pair of hooks. Each hook has an elastic inner support section and a hooking section. The elastic inner support section supports the inner wall of the hinge hole, and the hooking section penetrates the hinge hole and hooks the end edge of the hinge hole.

[0017] As a further improvement, the anti-slip part has a pair of hooks, the two hooks in the pair are symmetrical about the extension direction of the hinge tooth part, and the line connecting the two points where the elastic inner support section of the two hooks contacts the hinge hole bisects the hinge part.

[0018] As a further improvement, a support rib is provided between the side of the elastic inner support section of the two hooks that is away from the inner support hinge hole and the hinge tooth.

[0019] As a further improvement, the side of the elastic inner support section of the two hooks that contacts the inner support of the hinge hole is provided with a protruding tooth, and there is a pair of open position tooth grooves and a fastening position tooth groove circumferentially spaced at 90 degrees, so that when the hinge tooth part is in the fastening position, the protruding tooth of the elastic inner support section can be inserted into the open position tooth groove.

[0020] As a further improvement, the inner wall of the hinge hole is provided with six pairs of tooth grooves arranged at 30-degree intervals, one pair of tooth grooves forming the engagement tooth groove and the other five pairs of tooth grooves forming the opening tooth groove.

[0021] As a further improvement, the top cover is provided with locking teeth on both sides in the width direction, and the housing is provided with locking grooves for the locking teeth to enter when the top cover is fastened. The locking teeth are provided with protrusions so that they are pressed against the locking grooves after entering them.

[0022] As a further improvement, the locking teeth are located on the inside of the top cover, and a reinforcing rib is provided between the locking teeth and the top cover.

[0023] As a further improvement, the locking teeth are provided with continuous and wavy protrusions.

[0024] This invention is an improved invention, and its beneficial effects are as follows: The hinge shaft and hinge hole configured in this invention can restrict the upper cover to a certain position through the meshing of the hinge teeth and the grooves of the hinge hole. Specifically, when the PLC module is in normal use, the two ends of the hinge teeth can be embedded in the meshing grooves to restrict the upper cover to the meshing position, thereby preventing the upper cover from being accidentally opened. When maintenance, wiring, or other operations are required, the upper cover can be manually flipped upwards, providing a flipping torque to make the two ends of the hinge teeth disengage from the meshing grooves. As the upper cover is flipped, the two ends of the hinge teeth can eventually enter the opening grooves, so that the upper cover is suspended and held in the opening position. With the cooperation of the hinge teeth and the grooves, the upper cover can remain stationary without external force. At this time, the staff does not need to manually support the upper cover, which facilitates the staff to perform maintenance, wiring, and other operations.

[0025] Meanwhile, the hook of the hinge anti-detachment part can engage with the hinge hole to prevent detachment, thereby preventing the hinge from accidentally coming out of the hinge hole when flipping the top cover, ensuring that the overall shell has high reliability.

[0026] To achieve the above objectives, the technical solution of the PLC provided by this invention is as follows: A PLC includes multiple PLC modules. Each PLC module includes a housing and electrical components mounted on the housing. The housing includes a shell and a top cover, one of which has a hinge hole and the other has a hinge shaft. The top cover can be flipped relative to the shell through the rotatable engagement of the hinge shaft and the hinge hole. The hinge shaft includes a hinge tooth portion and an anti-detachment portion. The inner wall of the hinge hole has a pair of engaging tooth grooves and at least a pair of flip-open tooth grooves. Each pair of engaging tooth grooves is radially opposite to two tooth grooves in the flip-open tooth grooves. During the rotational stroke of the hinge shaft relative to the hinge hole, the two ends of the hinge tooth portion have engaging positions that are embedded in the engaging tooth grooves to keep the top cover in a engaged state and flip-open positions that are embedded in the flip-open tooth grooves to suspend the top cover in a flip-open state. The anti-detachment portion includes a pair of hooks. Each hook has an elastic inner support section and a hooking section. The elastic inner support section supports the inner wall of the hinge hole, and the hooking section penetrates the hinge hole and hooks the end edge of the hinge hole.

[0027] As a further improvement, the anti-slip part has a pair of hooks, the two hooks in the pair are symmetrical about the extension direction of the hinge tooth part, and the line connecting the two points where the elastic inner support section of the two hooks contacts the hinge hole bisects the hinge part.

[0028] As a further improvement, a support rib is provided between the side of the elastic inner support section of the two hooks that is away from the inner support hinge hole and the hinge tooth.

[0029] As a further improvement, the side of the elastic inner support section of the two hooks that contacts the inner support of the hinge hole is provided with a protruding tooth, and there is a pair of open position tooth grooves and a fastening position tooth groove circumferentially spaced at 90 degrees, so that when the hinge tooth part is in the fastening position, the protruding tooth of the elastic inner support section can be inserted into the open position tooth groove.

[0030] As a further improvement, the inner wall of the hinge hole is provided with six pairs of tooth grooves arranged at 30-degree intervals, one pair of tooth grooves forming the engagement tooth groove and the other five pairs of tooth grooves forming the opening tooth groove.

[0031] As a further improvement, the top cover is provided with locking teeth on both sides in the width direction, and the housing is provided with locking grooves for the locking teeth to enter when the top cover is fastened. The locking teeth are provided with protrusions so that they are pressed against the locking grooves after entering them.

[0032] As a further improvement, the locking teeth are located on the inside of the top cover, and a reinforcing rib is provided between the locking teeth and the top cover.

[0033] As a further improvement, the locking teeth are provided with continuous and wavy protrusions.

[0034] This invention is an improved invention, and its beneficial effects are as follows: The hinge shaft and hinge hole configured in this invention can restrict the upper cover to a certain position through the meshing of the hinge teeth and the grooves of the hinge hole. Specifically, when the PLC module is in normal use, the two ends of the hinge teeth can be embedded in the meshing grooves to restrict the upper cover to the meshing position, thereby preventing the upper cover from being accidentally opened. When maintenance, wiring, or other operations are required, the upper cover can be manually flipped upwards, providing a flipping torque to make the two ends of the hinge teeth disengage from the meshing grooves. As the upper cover is flipped, the two ends of the hinge teeth can eventually enter the opening grooves, so that the upper cover is suspended and held in the opening position. With the cooperation of the hinge teeth and the grooves, the upper cover can remain stationary without external force. At this time, the staff does not need to manually support the upper cover, which facilitates the staff to perform maintenance, wiring, and other operations.

[0035] Meanwhile, the hook of the hinge anti-detachment part can engage with the hinge hole to prevent detachment, thereby preventing the hinge from accidentally coming out of the hinge hole when flipping the top cover, ensuring that the overall shell has high reliability. Attached Figure Description

[0036] Figure 1This is a perspective view of the PLC implementation method in this invention (top cover fastened). Figure 2 This is a perspective view of the PLC implementation method in this invention (top cover open). Figure 3 This is an exploded view of a sub-module of the PLC implementation method in this invention; Figure 4 This is a schematic diagram of the hinge between the top cover and the outer shell of the sub-module in the PLC implementation of this invention; Figure 5 This is a schematic diagram of the hinge shaft and hinge hole mating point of a sub-module in the PLC implementation of this invention; Figure 6 This is a schematic diagram of the locking teeth between the top cover and the outer shell of the sub-module in the PLC implementation of this invention; Figure 7 This is a schematic diagram from another perspective of the locking teeth of the top cover and outer shell of the sub-module in the PLC implementation of the present invention. Figure 8 This is a cross-sectional view of the top cover of the sub-module in the PLC implementation of the present invention at the locking teeth after being fastened. Figure 9 This is a cross-sectional view of a sub-module in the PLC implementation of this invention; Figure 10 This is a schematic diagram showing the insertion relationship between the main body and the base of the sub-module in the PLC implementation of this invention. Figure 11 This is a schematic diagram of the base of a sub-module in the PLC implementation of the present invention; Figure 12 This is a schematic diagram of the base of a sub-module in the PLC implementation of the present invention from another perspective; Figure 13 This is a partial schematic diagram of the locking device position of a submodule in the PLC implementation of this invention.

[0037] Explanation of reference numerals in the attached figures: 1. CPU module; 2. Sub-module; 3. Guide rail; 21. Top cover; 22. Main body; 23. Base; 211. Hinge tooth section; 212. Elastic inner support section; 213. Hook section; 214. Protruding tooth; 215. Support rib; 216. Locking tooth; 217. Reinforcing rib; 221. Hinge hole; 222. Tooth groove; 223. Locking groove; 224. Male end; 231. Female end; 232. Side buckle; 233. First pull buckle; 234. Locking hole; 235. Second pull buckle; 236. Locking device. Detailed Implementation

[0038] To facilitate maintenance and wiring operations for PLC modules, the basic concept of this invention is to allow the top cover to remain suspended at a specific opening angle after being flipped open, thus eliminating the need for manual support and freeing up the operator's hands. Specifically, this invention improves the structural connection between the hinge of the flip cover and the housing by incorporating a toothed and grooved structure between the hinge shaft and the hinge hole. This structure overcomes the weight of the top cover and prevents it from returning to its original position.

[0039] During the flipping of the top cover, because there are teeth and grooves between the hinge shaft and the hinge hole, the teeth may come out of the hinge hole after being deformed by force. To address this, an anti-disengagement part is also provided on the hinge shaft that hooks with the end of the hinge hole to prevent the hinge shaft from coming out of the hinge hole, ensuring the reliable application of the PLC module.

[0040] Based on the above concept, the present invention will be further described in detail below with reference to the embodiments.

[0041] Specific implementation methods of the PLC provided by this invention: The PLC provided in this embodiment is as follows: Figure 1 and Figure 2 As shown, it includes multiple PLC modules, specifically a CPU module 1 and multiple sub-modules 2. Sub-modules 2 can be power supply modules, I / O modules, communication modules, etc. Each module includes a housing and electrical components mounted on the housing. The types of electrical components can be consistent with existing technologies and will not be described in detail here. The following uses sub-module 2 as an example to describe the features and performance of the housing in detail.

[0042] like Figure 3 As shown, submodule 2 can be divided into three parts: top cover 21, main body 22, and base 23. Furthermore, top cover 21 is hinged to main body 22, and main body 22 is inserted into base 23. The outer shells of main body 22 and base 23 together constitute the shell of submodule 2. Top cover 21 is hinged to the shell and can be rotated relative to the shell.

[0043] Specifically, to achieve the hinged relationship between the upper cover 21 and the housing, a hinge pin should be provided on one of the upper cover 21 and the housing, and a hinge hole 221 should be provided on the other. The hinge pin can rotate within the hinge hole 221. As shown in the figure, the hinge hole 221 is located on the housing, and the hinge pin is located on the upper cover 21. Those skilled in the art will understand that the positions of the hinge pin and the hinge hole 221 can be interchanged. It should be emphasized that the term "hinge pin" here should be interpreted broadly, referring to a structure with a defined axis that can rotate within the hinge hole 221.

[0044] like Figure 4 and Figure 5As shown, the inner wall of the hinge hole 221 is provided with a toothed groove 222, and the hinge shaft is provided with a hinge tooth portion 211. The hinge tooth portion 211 can be understood as the part of the hinge shaft with a toothed structure. The hinge tooth portion 211 can be embedded or enter the toothed groove 222, thereby limiting the rotation of the hinge shaft relative to the hinge hole 221 to a certain extent. Specifically, the hinge tooth portion 211 can be a flat plate structure as shown in the figure.

[0045] The position of the groove 222 on the inner wall of the hinge hole 221 should be such that after the upper cover 21 is opened to a certain angle, it can cooperate with the hinge tooth 211 to keep the upper cover 21 suspended in a certain position, so as to facilitate maintenance, wiring and other work by the staff. At the same time, when the upper cover 21 is in the latched (i.e. closed) state, the groove 222 should also be able to accommodate the hinge tooth 211 to prevent the upper cover 21 from being opened accidentally.

[0046] Specifically, the inner wall of the hinge hole 221 is provided with a pair of engaging tooth grooves, and the two tooth grooves 222 in the pair of engaging tooth grooves are radially opposite. During the rotational stroke of the hinge shaft relative to the hinge hole 221, the two ends of the hinge tooth part 211 have engaging positions that can be inserted into the two engaging tooth grooves, thereby keeping the upper cover 21 in the engaged state.

[0047] The inner wall of the hinge hole 221 is provided with a pair of flip-up tooth grooves, and the two tooth grooves 222 in each pair of flip-up tooth grooves are radially opposite. During the rotation stroke of the hinge shaft relative to the hinge hole 221, the two ends of the hinge tooth part 211 have flip-up positions that can be inserted into a pair of flip-up tooth grooves, so that the upper cover 21 is suspended in the flip-up state.

[0048] At least one pair of opening tooth grooves should be provided. In this case, the top cover 21 can be suspended in a certain position after being opened to a certain angle. If the top cover 21 is to be opened to 90 degrees and then stop, and only one pair of opening tooth grooves is provided, then the line connecting the opening tooth grooves should be perpendicular to the line connecting the engaging tooth grooves. This line is a virtual line.

[0049] It should be noted that in this embodiment, the upper cover 21 can be suspended by the resistance generated by the cooperation of the tooth groove 222 and the hinge tooth 211. However, the resistance here is sufficient to overcome the flipping torque caused by the gravity of the upper cover 21. The hinge part itself can be elastically deformed, and the tooth groove 222 is provided with a toothed surface. When the upper cover 21 is manually flipped up or down, this resistance can be overcome so that the hinge shaft and the hinge part can rotate normally.

[0050] The hinge pin also includes an anti-disengagement part, which can be understood as the part of the hinge pin that prevents it from disengaging from the hinge hole 221. Specifically, as... Figure 4 and Figure 5As shown, the anti-detachment part includes hooks, which are also arranged in pairs. Specifically, the two hooks in each pair are radially opposite to the hinge hole 221. Each hook has an elastic inner support section 212 and a hooking section 213. After the upper cover 21 is assembled onto the housing, the elastic inner support section 212 tightens the inner wall of the hinge hole 221, and the hooking section 213 penetrates the hinge hole 221 and hooks the end edge of the hinge hole 221, thereby achieving the anti-detachment effect. When the upper cover 21 is manually flipped up or down, the elastic inner support section 212 is squeezed by the hinge hole 221 and can elastically deform and retract, thus allowing the hinge shaft to rotate normally.

[0051] In a preferred embodiment, such as Figure 4 and Figure 5 As shown, the anti-slip part has only one pair of hooks. The two hooks in this pair are symmetrical about the extension direction of the hinge tooth part 211, and the line (virtual) connecting the two points where the elastic inner support section 212 of the two hooks contacts the hinge hole 221 bisects the hinge part. In this case, the line connecting the contact point of the elastic inner support section 212 of the two hooks with the hinge hole 221 is perpendicular to the line connecting the contact points of the two ends of the hinge tooth part 211 with the hinge hole 221, or the central angle is 90 degrees. At this time, the anti-slip part and the hinge tooth part 211 together form a "+" shaped structure in contact with the hinge hole 221, resulting in more balanced force and improved reliability of the fit between the hinge shaft and the hinge part.

[0052] More preferably, a support rib 215 is provided between the side of the two hook claw elastic inner support section 212 opposite to the inner support hinge hole 221 and the hinge tooth part 211. This can improve the rigidity of the elastic inner support section 212 to a certain extent, prevent the elastic inner support section 212 from deforming inward with a small external force, and further improve the reliability of the anti-detachment part.

[0053] In a preferred embodiment, the anti-detachment part is considered as a U-shaped structure, and the hinge tooth part 211 is a flat plate structure located inside the U-shaped structure. When the hinge shaft is integrated into the upper cover 21, the hinge shaft can be integrally injection molded with the upper cover 21.

[0054] It should be noted here that in some other embodiments, the hook of the anti-slip part may not be symmetrical about the extension direction of the hinge tooth part 211. For ease of understanding, it is used as follows: Figure 5 For example, this can be seen as rotating the two hooks in Figure 5 clockwise or counterclockwise by a certain angle. Additionally, two pairs of hooks can be provided, and the lines connecting the two pairs of hooks to the hinge hole 221, totaling four contact points, can form an X shape.

[0055] Based on the above preferred embodiments, further, such as Figure 4 and Figure 5As shown, the side of the elastic inner support section 212 of the two hooks that contacts the inner support of the hinge hole 221 is provided with a protruding tooth 214, which can also enter the tooth groove 222. Since the anti-detachment part and the hinge tooth part 211 have a "+" shaped structure, when the hinge tooth part 211 enters the engaging tooth groove, the protruding tooth 214 should enter the unfolded tooth groove. That is, there is a pair of unfolded tooth grooves circumferentially spaced 90 degrees from the engaging tooth groove, so that when the hinge tooth part 211 is in the engaging position, the protruding tooth 214 of the elastic inner support section 212 can be embedded in the unfolded tooth groove. Similarly, when the hinge tooth part 211 is in the unfolded position, the protruding tooth 214 of the elastic inner support section 212 can be embedded in the engaging tooth groove.

[0056] The presence of protruding teeth 214 on the elastic inner support section 212 can further improve the reliability of the fit between the hinge shaft and the hinge joint, so that the upper cover 21 can be stably kept in the locked or opened state.

[0057] In a more preferred implementation, such as Figure 4 As shown, the inner wall of the hinge hole 221 has six pairs of toothed grooves 222 evenly distributed at 30-degree intervals, totaling 12 grooves. One pair of toothed grooves 222 constitutes the aforementioned engaging toothed groove, and the other five pairs of toothed grooves 222 constitute the aforementioned opening toothed groove. This allows the top cover 21 to be suspended at any 30-degree angle during the upward opening process, facilitating different operations for the workers. Furthermore, this design eliminates the need for specific orientations when assembling the top cover 21 and the housing, simplifying assembly operations for the workers.

[0058] More preferably, based on any of the above embodiments, such as Figures 6-8 As shown, locking teeth 216 are respectively provided on both sides of the upper cover 21 in the width direction. The housing is provided with locking grooves 223 for the locking teeth 216 to enter when the upper cover 21 is fastened. The locking teeth 216 are provided with protrusions so that they press against the locking grooves 223 after entering them. In this way, after the upper cover 21 is fastened, the locking force is provided by the cooperation of the locking grooves 223 and the locking teeth 216, which prevents the upper cover 21 from opening accidentally and further improves reliability.

[0059] Preferably, the locking tooth 216 is located on the inner side of the upper cover 21, and a reinforcing rib 217 is provided between the locking tooth 216 and the upper cover 21. This can improve the strength of the locking tooth 216 itself and the connection between the locking tooth 216 and the upper cover 21, and prevent the locking tooth 216 from breaking accidentally.

[0060] Preferably, the protrusions on the locking teeth 216 have a continuous and wavy extension structure, which can cooperate with the locking groove 223 to form a multi-point extrusion contact and provide greater locking force.

[0061] Different sub-modules 2 can all adopt the above-described shell structure. Of course, CPU module 1 can also adopt the above-described shell structure.

[0062] In addition, such as Figures 1-3 , Figures 9-13 As shown, for submodule 2, the housing structures of the main body 22 and the base 23 are detachably and fixedly connected. Specifically, an elastic snap-fit ​​structure can be used to lock the main body 22 and the base 23 after they are inserted. For details, please refer to the background art references in this specification. If it is necessary to remove the main body 22, the second pull buckle 235 can be pried open downwards to unlock the main body 22 and the base 23. At the same time, the main body 22 and the base 23 are also electrically connected through a connector. The main body 22 is provided with a male end 224 of the connector, and the base 23 is provided with a female end 231 of the connector.

[0063] For the PLC, the CPU module 1 and each sub-module 2 can be arranged and connected sequentially, and mounted on the guide rail 3 via their respective bases 23. Correspondingly, the elastic snap-fit ​​structure mentioned in the background art reference of this specification can also be used to connect and fix the base 23 to the guide rail 3. If it is necessary to remove the module, the first pull buckle 233 can be pried open downwards.

[0064] The female end 231 of the connector has protrusions and springs on both sides in the width direction (i.e. the arrangement direction of each module) that can contact each other to achieve electrical connection. Each sub-module 2 and CPU module 1 can be electrically connected in sequence according to the arrangement direction.

[0065] To improve the reliability of connections between PLC modules, in some preferred embodiments, such as Figure 1 and Figure 2 As shown, a side buckle 232 is provided on one side of the housing (specifically the housing of the base 23 part), and a buckle engagement structure that can cooperate with the side buckle 232 is provided on the other side. When assembling each module from top to bottom, the buckle engagement structure can enter the side buckle 232, and the two "pull" together to form a whole, improving the connection strength.

[0066] Before installing the PLC into actual equipment or production line, a detailed and comprehensive test is generally required. During the test, depending on the test requirements, the main body 22 of different sub-modules 2 may be pulled out from the base 23. At this time, there is no guide rail 3. When the main body 22 is pulled out, the friction between the main body 22 and the base 23 can easily pull the base 23 out along with it, causing the electrical connection between this sub-module 2 and other sub-modules 2 to be broken, which in turn leads to communication interruption.

[0067] To address the above issues, in a preferred embodiment, a locking device 236 is provided at the lower end of the base 23, such as... Figures 9-13As shown, the locking device 236 can slide relative to the housing of the base 23 in the width direction of the base 23. Correspondingly, a locking hole 234 is provided on the housing. When testing the PLC, the locking device 236 on one of the adjacent modules (sub-module 2 or sub-module 2 and CPU module 1) can be inserted into the locking hole 234 of the other module. At this time, the locking device 236 is in the locked position to connect the bases 23 of each module as a whole, preventing the bases 23 from being pulled out along with it, and ensuring the reliability of the test. When it is necessary to remove the base 23, the locking device 236 can be manually operated to move the locking device 236 out of the locking hole 234 to the unlocked position.

[0068] To facilitate personnel in determining the position of the lock 236, a lock mark and an unlock mark are provided at the bottom of the base 23.

[0069] Specific implementation of the PLC module provided by this invention: The implementation method of the PLC module is the same as the CPU module or sub-module described in the above-mentioned PLC implementation method, and will not be described in detail here.

[0070] Specific embodiments of the PLC module housing provided by this invention: The implementation method of the PLC module housing is the same as that described in the above-mentioned PLC implementation method, and will not be described in detail here.

[0071] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A PLC module housing comprising a housing and a cover, one of which is provided with a hinge hole and the other is provided with a hinge shaft, the cover being able to be turned relative to the housing through the rotatable cooperation of the hinge shaft and the hinge hole, characterized in that, The hinge shaft comprises a hinge tooth part and an anti-off part, the inner wall of the hinge hole is provided with a pair of buckling position tooth grooves and at least one pair of turning position tooth grooves, each pair of buckling position tooth grooves is opposite to two tooth grooves in the turning position tooth grooves in the radial direction, the two ends of the hinge tooth part have the buckling position tooth grooves embedded in the buckling position tooth grooves to keep the upper cover in the buckling state and the turning position tooth grooves embedded in the turning position tooth grooves to keep the upper cover in the turning state in the rotation stroke of the hinge shaft relative to the hinge hole, the anti-off part comprises a pair of hooks, each hook has an elastic inner supporting section and a hooking section, the elastic inner supporting section tightly supports the inner wall of the hinge hole, and the hooking section penetrates through the hinge hole and hooks the end wall of the hinge hole.

2. The PLC module housing of claim 1, wherein, The hooks of the anti-off part are provided with a pair of hooks, the two hooks in the pair are symmetrical about the extension direction of the hinge tooth part, and the line connecting the two points contacted by the elastic inner supporting sections of the two hooks divides the hinge part into two equal parts.

3. The PLC module housing of claim 2, wherein, The side of the elastic inner supporting sections of the two hooks away from the inner wall of the hinge hole is provided with a supporting rib between the hinge tooth part.

4. The PLC module housing of claim 2 or 3, wherein, The side of the elastic inner supporting sections of the two hooks contacting the inner wall of the hinge hole is provided with a protruding tooth, and one pair of turning position tooth grooves and buckling position tooth grooves are circumferentially spaced by 90 degrees, so that the protruding tooth of the elastic inner supporting section can be embedded in the turning position tooth groove when the hinge tooth part is in the buckling position.

5. The PLC module housing of claim 4, wherein, The inner wall of the hinge hole is provided with six pairs of tooth grooves arranged at intervals of 30 degrees, and one pair of tooth grooves constitutes the buckling position tooth groove and the other five pairs of tooth grooves constitute the turning position tooth groove.

6. The PLC module housing of any of claims 1-3, wherein, The two side parts of the upper cover in the width direction are respectively provided with a locking tooth, the shell is provided with a locking groove for the locking tooth to enter when the upper cover is buckled, and the locking tooth is provided with a protruding spike to be pressed with the locking groove after entering the locking groove.

7. The PLC module housing of claim 6, wherein, The locking tooth is arranged on the inner side of the upper cover, and a reinforcing rib is arranged between the locking tooth and the upper cover.

8. The PLC module housing of claim 6, wherein, The protruding spike on the locking tooth is continuous and in a wave shape.

9. A PLC module comprising a housing and electrical components mounted on the housing, characterized by, The shell is the PLC module shell of any one of claims 1-8.

10. A PLC comprising a plurality of PLC modules, the PLC modules comprising a housing and electrical components mounted on the housing, characterized in that, The shell is the PLC module shell of any one of claims 1-8.

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