Shell, sub-module and programmable logic controller

Abstract

The utility model provides a shell, a submodule and a programmable logic controller. The shell comprises a first side plate provided with an inner side and an outer side, and one or more guide column type clamping pins are arranged on the outer side of the first side plate; the second side plate is provided with an inner side and an outer side, the second side plate is roughly parallel to the first side plate, the inner side of the second side plate is opposite to the inner side of the first side plate, one or more first through holes are formed in the second side plate, and the first through holes are configured to allow guide pillar type bayonet locks of another shell to be inserted; the latch plate is connected to the inner side of the first side plate in a sliding mode, the latch plate is provided with a locking position and an unlocking position, and the latch plate is provided with one or more lock catches; wherein the submodules (shells) can be quickly and stably connected through the guide pillar type bayonet lock and the latch plate (suitable for a high-level vibration environment), and the connection mode allows a user to easily complete the quick connection of the modules by a single hand without visual assistance, so that the convenience and efficiency of operation are ensured.

Description

Technical Field

[0001] The utility model generally relates to the technical field of industrial automation control equipment, in particular to a housing, a sub-module and a programmable logic controller. Background Art

[0002] Modular PLC (Programmable Logic Controller) is a highly flexible and scalable industrial automation control device. Compared with traditional PLCs, modular PLCs consist of multiple independent sub-modules, including processor modules, input / output (I / O) modules, communication modules, etc. Users can select and combine these sub-modules according to specific requirements. The stability of the mechanical connection of the sub-modules is crucial for the data communication and product robustness of the sub-modules, and the convenience of the mechanical connection of the sub-modules is crucial for the efficiency of the repair / maintenance of the sub-modules.

[0003] Therefore, how to improve the stability and convenience of the mechanical connection of sub-modules has always been the goal pursued by PLC manufacturers.

[0004] The content of the background art section is only the technology known to the inventor and does not of course represent the prior art in this field. Summary of the Utility Model

[0005] In view of one or more deficiencies in the prior art, the utility model provides a housing, comprising:

[0006] A first side plate, having an inner side and an outer side, wherein one or more guide post pins are arranged on the outer side of the first side plate;

[0007] A second side plate, having an inner side and an outer side, the second side plate being substantially parallel to the first side plate, the inner side of the second side plate being opposite to the inner side of the first side plate, and one or more first through holes being arranged on the second side plate, the first through holes being configured to allow the guide post pins of another housing to be inserted; and

[0008] A latch plate, slidably connected to the inner side of the first side plate, the latch plate having a locking position and an unlocking position, and one or more latches being arranged on the latch plate;

[0009] Wherein, when the latch plate is in the locking position, the latch plate can be clamped with the guide post pins of another housing through the latches.

[0010] According to one aspect of the utility model, a first slot is arranged on the side surface of the guide post pin.

[0011] According to one aspect of the present utility model, a first limit buckle and a second limit buckle are provided on the inner side of the second side plate. A sliding area is formed between the first limit buckle and the second limit buckle, and the latch plate is slidably arranged in the sliding area.

[0012] According to one aspect of the present utility model, a first release groove and a second release groove are provided on the edge of the latch plate;

[0013] Wherein, the latch plate has a disassembly position. When the latch plate is in the disassembly position, the first release groove is aligned with the first limit buckle, and the second release groove is aligned with the second limit buckle.

[0014] According to one aspect of the present utility model, a first relief groove and a second relief groove are provided on the edge of the latch plate. The first relief groove is communicated with the first release groove, and the second relief groove is communicated with the second release groove;

[0015] Wherein, when the latch plate is in the locked position, the first limit buckle is embedded in the first relief groove, and the second limit buckle is embedded in the second relief groove.

[0016] According to one aspect of the present utility model, a protrusion is provided on the inner side of the second side plate, and a buckle structure is provided on the latch plate. The buckle structure has a first clamping point;

[0017] Wherein, when the latch plate is in the locked position, the protrusion is clamped with the first clamping point of the buckle structure.

[0018] According to one aspect of the present utility model, the buckle structure further has a second clamping point. When the latch plate is in the unlocked position, the protrusion is clamped with the second clamping point of the buckle structure.

[0019] According to one aspect of the present utility model, the buckle structure includes:

[0020] A groove, arranged on the edge of the latch plate;

[0021] An elastic buckle, arranged at the notch of the groove and connected with the latch plate. A second clamping groove is provided on the elastic buckle;

[0022] Wherein, the groove serves as the first clamping point, and the second clamping groove serves as the second clamping point.

[0023] According to one aspect of the present utility model, a second through hole is provided on the second side plate, and an operation handle is provided on the latch plate. The operation handle is aligned with the second through hole.

[0024] The present utility model also provides a sub-module of a programmable logic controller, including the housing as described above.

[0025] The present utility model also provides a programmable logic controller, which includes a plurality of sub-modules, and the sub-modules include the housing as described above.

[0026] Among them, the plurality of sub-modules are arranged in sequence along the first direction, and adjacent sub-modules are clamped through a guide post type snap pin and a latch plate.

[0027] Compared with the prior art, the embodiments of the present utility model provide a housing, a sub-module and a programmable logic controller. The sub-modules (housings) can be quickly and stably connected through a guide post type snap pin and a latch plate (suitable for a high-level vibration environment). This connection method allows users to easily complete the quick connection of the modules with one hand without visual assistance, ensuring the convenience and efficiency of operation. Especially in an industrial environment with limited space or poor visibility, this function of simple one-handed connection is particularly prominent, which can greatly improve work efficiency and reduce the time loss caused by operation complexity. In addition, the sub-modules (housings) are connected through a guide post type snap pin and a latch plate, which is beneficial to the expansion of the programmable logic controller. Even when more sub-modules are selected and matched, it can ensure that there is no extrusion or bending effect, thus maintaining the structural integrity and stability of the entire system. Description of the Drawings

[0028] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0029] Figure 1 A schematic diagram of a housing according to an embodiment of the present utility model is shown;

[0030] Figure 2 A schematic diagram of a partial structure of a housing according to an embodiment of the present utility model is shown;

[0031] Figure 3 and Figure 4 Schematic diagrams of partial structures of two housings are respectively shown;

[0032] Figure 5 A schematic diagram of a latch plate according to an embodiment of the present utility model is shown;

[0033] Figure 6 Another direction schematic diagram of a latch plate according to an embodiment of the present utility model is shown;

[0034] Figure 7 and Figure 8 Schematic diagrams of the connection structures of sub-modules of a modular PLC are respectively shown.

[0035] In the figure: 100, housing; 110, first side plate; 111, guide pin type latch; 112, first card slot; 120, second side plate; 121, first through hole; 122, second through hole; 123, first limit buckle; 124, second limit buckle; 125, protrusion; 130, latch plate; 131, lock; 132, operating handle; 133, first release slot; 134, second release slot; 135, first relief slot; 136, second relief slot; 137, buckle structure; 1371, groove; 1372, elastic buckle; 1373, second card slot; 140, third side plate; 150, top plate. Detailed implementation manners

[0036] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0038] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection: it can be a mechanical connection, an electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0040] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, components and settings of specific examples are described hereinafter. Of course, they are merely examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0041] The preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present utility model and are not intended to limit the present utility model.

[0042] Figure 1 A schematic diagram of a housing 100 according to an embodiment of the present utility model is shown. Figure 2 A schematic diagram of a partial structure of a housing 100 according to an embodiment of the present utility model is shown. The following is described in detail in conjunction with Figure 1 and Figure 2 for a detailed description.

[0043] As shown in Figure 1 and Figure 2As shown, the housing 100 includes a first side plate 110, a second side plate 120, and a latch plate 130. Among them, both the first side plate 110 and the second side plate 120 have an inner side and an outer side. The first side plate 110 and the second side plate 120 are substantially parallel (substantially parallel means that within a given error threshold, the first side plate 110 and the second side plate 120 reach a state close to parallel). The inner side of the first side plate 110 faces the inner side of the second side plate 120. Here, the inner side and the outer side can be distinguished according to the inside and outside of the housing 100. The inner side corresponds to the inside of the housing 100, and the outer side corresponds to the outside of the housing 100. One or more guide pin-type pins 111 are provided on the outer side of the first side plate 110, and one or more first through holes 121 are provided on the second side plate 120. The positions of the guide pin-type pins 111 correspond to the positions of the first through holes 121. Optionally, the orthographic projection of the guide pin-type pins 111 on the second side plate 120 is located within the corresponding first through holes 121. The first through holes 121 are configured to allow the guide pin-type pins 111 of another housing 200 to be inserted (the housing 100 and the housing 200 are consistent in structure and share the same design features and functional characteristics. In order to clearly distinguish these two housings 100 in this article, the labels 100 and 200 are used for identification). Optionally, an interference fit or a clearance fit relationship is adopted between the first through holes 121 and the guide pin-type pins 111 to achieve a tighter connection and accurate guidance and positioning. The latch plate 130 is slidably connected to the inner side of the first side plate 110, and one or more latches 131 are provided on the latch plate 130. Figure 3 and Figure 4 respectively show schematic diagrams of partial structures of two housings 100. As Figure 3 and Figure 4 shown, the guide pin-type pins 111 of the housing 200 pass through the first through holes 121 on the second side plate 120 of the housing 100. The latch plate 130 has a locking position (as Figure 3 shown) and an unlocking position (as Figure 4As shown in the figure, when the latch plate 130 of the housing 100 is in the locked position, the latch plate 130 of the housing 100 can be engaged with the guide pin type latch 111 of the housing 200 through the latch 131; when the latch plate 130 of the housing 100 is in the unlocked position, the latch plate 130 of the housing 100 is not connected to the guide pin type latch 111 of the housing 200. In this embodiment, the cooperation between the guide pin type latch 111 and the latch plate 130 between the housings 100 and 200 can achieve fast and stable connection. This connection method is suitable for high-level vibration environments, has low cost, and at the same time allows the user to easily complete the fast connection of the module with one hand without visual assistance, ensuring the convenience and efficiency of the operation. Especially in industrial environments with limited space or poor visibility, this function of simple one-handed connection is particularly prominent, which can greatly improve work efficiency and reduce the time loss caused by operation complexity. Optionally, the housing 100 may further include a third side plate 140, a fourth side plate (not shown in the figure), a top plate 150 and a bottom plate (not shown in the figure) connected between the first side plate 110 and the second side plate 120. The first side plate 110, the second side plate 120, the third side plate 140, the fourth side plate, the top plate 150 and the bottom plate together define a receiving cavity.

[0044] According to an embodiment of the present invention, as Figure 2 shown, a second through hole 122 is provided on the second side plate 120. An operation handle 132 is provided on the latch plate 130, and the operation handle 132 is aligned with the second through hole 122 so that the user can move the latch plate 130 by pushing and pulling the operation handle 132. Optionally, two second through holes 122 and two operation handles 132 are respectively provided. Among them, the two second through holes 122 are respectively located at both ends of the second side plate 120, and the two operation handles 132 are respectively located at both ends of the latch plate 130.

[0045] According to an embodiment of the present invention, as Figure 2 and Figure 3 shown, a first card slot 112 is provided on the side of the guide pin type latch 111. When connecting the two housings 100 and 200 together, the latch 131 on the latch plate 130 of the housing 100 is inserted into the first card slot 112 on the guide pin type latch 111 of the housing 200 to achieve stable and reliable engagement. In some embodiments, in order to simplify the design and reduce the cost, the first card slot 112 may not be provided on the guide pin type latch 111. In this case, the engagement between the guide pin type latch 111 and the latch 131 is achieved by the frictional force formed by their close contact.

[0046] According to an embodiment of the present invention, as Figure 3 and Figure 4As shown, a first limiting buckle 123 and a second limiting buckle 124 are arranged on the inner side of the second side plate 120, and a preset distance is spaced between the first limiting buckle 123 and the second limiting buckle 124, and a sliding area is formed between the first limiting buckle 123 and the second limiting buckle 124. The latch plate 130 is slidably arranged in the sliding area, wherein the first limiting buckle 123 is located above the latch plate 130, and the second limiting buckle 124 is located below the latch plate 130, and the first limiting buckle 123 and the second limiting buckle 124 cooperate with each other to prevent the latch plate 130 from being separated from the sliding area, especially to prevent the latch plate 130 from being separated from the sliding area in the locked position. Optionally, the first limiting buckle 123 and the second limiting buckle 124 can be arranged in multiple groups (for example, two groups, three groups, etc.) to provide better support and fixation for the latch plate 130, ensure the effective clamping of the latch plate 130 with the guide column type bayonet 111, and make the latch plate 130 slide more smoothly in the sliding area.

[0047] Figure 5 A schematic diagram of a latch plate 130 according to an embodiment of the present invention is shown. Figures 3 to 5 As shown, a first release groove 133 is provided on the upper edge of the latch plate 130, and a second release groove 134 is provided on the lower edge of the latch plate 130. The latch plate 130 also has a disassembly position. When the latch plate 130 is in the disassembly position, the first release groove 133 is aligned with the first limit buckle 123, and the second release groove 134 is aligned with the second limit buckle 124, and the latch plate 130 can be removed from the second side plate 120. In this embodiment, the disassembly position, unlocking position, and locking position of the latch plate 130 are staggered. The present invention does not specifically limit the order of the disassembly position, unlocking position, and locking position, and allows them to be flexibly arranged according to actual needs, as long as the latch plate 130 can achieve the corresponding functions in the disassembly position, unlocking position, and locking position. In some embodiments, the disassembly position and unlocking position of the latch plate 130 can be the same position, that is, the disassembly position and the unlocking position overlap.

[0048] According to one embodiment of the utility model, Figures 3 to 5 As shown, a first clearance groove 135 is provided on the upper edge of the latch plate 130, and the first clearance groove 135 is adjacent to and communicated with the first release groove 133. A second clearance groove 136 is provided on the lower edge of the latch plate 130, and the second clearance groove 136 is adjacent to and communicated with the second release groove 134. When the latch plate 130 is in the locked position, the first limiting buckle 123 is embedded in (entered into) the first clearance groove 135, and the second limiting buckle 124 is embedded in the second clearance groove 136.

[0049] According to one embodiment of the utility model, Figure 3 and Figure 4As shown, a protrusion 125 is provided on the inner side of the second side plate 120, and a buckle structure 137 adapted to the protrusion 125 is provided on the latch plate 130. The buckle structure 137 has a first locking point and / or a second locking point. Among them, when the latch plate 130 is in the locked position, the protrusion 125 is clamped with the first locking point of the buckle structure 137 to limit the latch plate 130 in the locked position, ensuring the effective clamping of the latch plate 130 and the guide pin type latch 111 (preventing the latch plate 130 from being disengaged from the guide pin type latch 111), and improving the reliability of the connection between the housings 100. When the latch plate 130 is in the unlocked position, the protrusion 125 is clamped with the second locking point of the buckle structure 137 to limit the latch plate 130 in the unlocked position, preventing the latch plate 130 from sliding to the disassembly position, and further preventing the latch plate 130 from falling off from the sliding area. Optionally, the protrusion 125 and the buckle structure 137 can be provided in multiple groups to provide good positioning for the latch plate 130.

[0050] Figure 6 FIG. shows another schematic view of the latch plate 130 according to an embodiment of the present invention, as Figure 5 and Figure 6 shown, the buckle structure 137 may include a groove 1371 and an elastic buckle 1372. The groove 1371 is provided at the edge of the latch plate 130 (such as the upper edge, lower edge). The elastic buckle 1372 is provided at the notch of the groove 1371 and is connected to the latch plate 130. A second card slot 1373 is provided on the elastic buckle 1372. Among them, the groove 1371 can be used as the first locking point. When the latch plate 130 is in the locked position, the protrusion 125 is inserted into the groove 1371; the second card slot 1373 can be used as the second locking point. When the latch plate 130 is in the unlocked position, the protrusion 125 is inserted into the second card slot 1373. By adopting the cooperation of the buckle structure 137 and the protrusion 125, not only can the latch plate 130 be effectively positioned, but also a good operating feel can be provided for the user. For example, when the latch plate 130 is switched from the locked position to the unlocked position, the protrusion 125 is inserted into the second card slot 1373, and the elastic buckle 1372 will generate vibration and sound, providing tactile and auditory feedback for the user to indicate that the latch plate 130 has been operated in place. Optionally, two second card slots 1373 can be provided on the elastic buckle 1372, and the two second card slots 1373 are respectively used as the first locking point and the second locking point. Optionally, the protrusion 125 is provided with a guiding inclined surface to enable the user to slide the latch plate 130 more easily, so that the groove 1371 is disengaged from the buckle structure 137 (the first locking point, the second locking point).

[0051] An embodiment of the present invention further provides a sub-module of a programmable logic controller. The sub-module includes the housing 100 as described above.

[0052] An embodiment of the present utility model further provides a programmable logic controller. The programmable logic controller includes a plurality of sub-modules, and the sub-modules include the housing 100 as described above. Among them, the plurality of sub-modules are arranged in sequence along the first direction, and adjacent sub-modules are snap-connected through a guide post type snap pin 111 and a latch plate 130.

[0053] Figure 7 The schematic diagram of the connection structure of the sub-module of an existing modular PLC is shown. As Figure 7 shown, a vertical card slot is provided on the side of one sub-module 300, and a strip-shaped protrusion is provided on the side of another sub-module 400. The connection between the two sub-modules 300 and 400 is realized through the cooperation of the vertical card slot and the strip-shaped protrusion. Using this connection method requires additional card slot space, increasing the product thickness; when installed on a DIN rail 500, maintenance and disassembly are not very convenient, and the electronic connectors between sub-modules need to be specially customized, increasing the cost.

[0054] Figure 8 The schematic diagram of the connection structure of the sub-module of an existing modular PLC is shown. As Figure 8 shown, the sub-module 600 is connected to the backplane 700 by means of buckles, screws, etc. Specifically, one end (for example, the lower end) of the sub-module 600 is connected to the backplane 700 through a buckle (with a rotating shaft), and the other end (for example, the upper end) is rotated around the rotating shaft and then connected to the backplane 700 through a buckle or a screw. Using this connection method requires additional buckles for the sub-module 600. The buckles occupy the product space, increasing the product cost. Maintenance and disassembly are not very convenient, and there are special requirements for the connectors of the electrical connection (rotating insertion, power connection sequence of PIN feet, etc.).

[0055] Compared with the prior art, the embodiment of the present utility model provides a housing, a sub-module and a programmable logic controller. The sub-modules (housings) can be quickly and stably connected through a guide post type snap pin and a latch plate (suitable for a high-level vibration environment). This connection method allows users to easily complete the quick connection of the module with one hand without visual assistance, ensuring the convenience and efficiency of the operation. Especially in an industrial environment with limited space or poor visibility, this one-handed simple connection function is particularly prominent, which can greatly improve work efficiency and reduce the time loss caused by operation complexity. In addition, the sub-modules (housings) are connected through a guide post type snap pin and a latch plate, which is conducive to the expansion of the programmable logic controller. Even when more sub-modules are selected, it can ensure that there is no extrusion or bending effect, thus maintaining the structural integrity and stability of the entire system.

[0056] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A housing, characterized in that: include: A first side plate having an inner side and an outer side, wherein the outer side of the first side plate is provided with one or more guide post type bayonet pins; A second side plate having an inner side and an outer side, the second side plate being substantially parallel to the first side plate, the inner side of the second side plate being opposite to the inner side of the first side plate, the second side plate being provided with one or more first through holes, the first through holes being configured to allow a guide post type bayonet of another housing to be inserted; and A latch plate, slidably connected to the inner side of the first side plate, the latch plate having a locked position and an unlocked position, and the latch plate is provided with one or more locks; When the latch plate is in the locked position, the latch plate can be engaged with a guide post-type latch of another housing through a lock catch.

2. The housing according to claim 1, characterized in that A first locking groove is arranged on the side surface of the guide column type locking pin.

3. The housing according to claim 1, characterized in that A first limiting buckle and a second limiting buckle are arranged on the inner side of the second side plate, a sliding area is formed between the first limiting buckle and the second limiting buckle, and the latch plate is slidably arranged in the sliding area.

4. The housing according to claim 3, characterized in that: The edge of the latch plate is provided with a first release groove and a second release groove; Wherein, the latch plate has a disassembly position. When the latch plate is in the disassembly position, the first tripping groove is aligned with the first limiting buckle, and the second tripping groove is aligned with the second limiting buckle.

5. The housing according to claim 4, characterized in that: The edge of the latch plate is provided with a first clearance groove and a second clearance groove, the first clearance groove is communicated with the first release groove, and the second clearance groove is communicated with the second release groove; Wherein, when the latch plate is in the locked position, the first limiting buckle is embedded in the first giving way groove, and the second limiting buckle is embedded in the second giving way groove.

6. The housing according to claim 1, characterized in that The inner side of the second side plate is provided with a protrusion, the latch plate is provided with a buckle structure, and the buckle structure has a first clamping point; Wherein, when the latch plate is in the locked position, the protrusion is engaged with the first locking point of the buckle structure.

7. The housing according to claim 6, characterized in that The buckle structure also has a second buckle point. When the latch plate is in the unlocking position, the protrusion is buckled with the second buckle point of the buckle structure.

8. The housing according to claim 7, characterized in that The buckle structure comprises: a groove disposed at an edge of the latch plate; An elastic buckle, arranged at the notch of the groove and connected to the latch plate, and a second clamping groove is arranged on the elastic buckle; The groove serves as a first clamping point, and the second clamping groove serves as a second clamping point.

9. The housing according to claim 1, characterized in that The second side plate is provided with a second through hole, and the latch plate is provided with an operating handle, and the operating handle is aligned with the second through hole.

10. A submodule of a programmable logic controller, characterized in that: A housing comprising any one of claims 1 to 9.

11. A programmable logic controller, characterized in that: comprising a plurality of submodules, wherein the submodules include the housing according to any one of claims 1 to 9; The plurality of submodules are arranged in sequence along the first direction, and adjacent submodules are connected to each other via guide post type latches and latch plates.

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