Expansion module and control system

Abstract

The utility model provides an extension module and a control system. The expansion module (100) is used for a control system, the expansion module (100) comprises a first sub-shell (1), a second sub-shell (2), a limiting device and a connector, the limiting device comprises a limiting structure constructed on the first sub-shell (1) and a paired limiting structure constructed on the second sub-shell (2), and the connector is connected with the first sub-shell (1) and the second sub-shell (2). The connector comprises a connector part (3) and a paired connector part (4), and the limiting device is used for limiting the relative position between the first sub-shell (1) and the second sub-shell (2) when the first sub-shell (1) and the second sub-shell (2) are assembled, so that the connector part (3) and the paired connector part (4) are connected with each other. According to the invention, the assembly of the connector of the expansion module is realized in a convenient, rapid and reliable manner.

Description

Technical Field

[0001] The present disclosure relates to the field of control, and more particularly, to an expansion module and a control system. Background Art

[0002] This section aims to provide background information related to understanding the various technologies described herein. As implied by the title of this section, this is not necessarily a discussion of related technologies that are prior art in any way. Therefore, it should be understood that any statement in this section should be read from this perspective and not as any admission of prior art.

[0003] For building control system products, in some design solutions, 2 PCBAs (Printed Circuit Board Assembly) are installed - the top PCBA and the bottom PCBA. There are many different types of communication connections between the top and bottom PCBAs, but most of them are not good enough and are not convenient for installation. In some other design solutions, other numbers of circuit boards can also be set, but the installation problem of communication connection devices is also involved. Summary of the Utility Model

[0004] The purpose of the present disclosure is to assemble the connector of the expansion module in a convenient, fast, and reliable manner.

[0005] In addition, the purpose of the present disclosure is to solve or at least alleviate one or more problems existing in the prior art.

[0006] The present disclosure solves the above problems by providing an expansion module and a control system. Specifically, according to one aspect of the present disclosure, there is provided:

[0007] An expansion module for a control system, wherein the expansion module includes a first sub - housing, a second sub - housing, a limiting device, and a connector. The limiting device includes a limiting structure formed on the first sub - housing and a mating limiting structure formed on the second sub - housing. The connector includes a connector component and a mating connector component. The limiting device is used to limit the relative position between the first sub - housing and the second sub - housing when the first sub - housing and the second sub - housing are assembled, so that the connector component and the mating connector component can be connected to each other.

[0008] Optionally, according to an embodiment of the present disclosure, the limiting device includes one or more of pin - hole limiting, snap - fit limiting, concave - convex limiting, baffle limiting, and magnetic limiting.

[0009] Optionally, according to an embodiment of the present disclosure,

[0010] The limiting structure includes a first limiting portion, the paired limiting structure includes a third limiting portion, the third limiting portion includes a groove, and the groove can at least partially surround the first limiting portion; and / or

[0011] The limiting structure includes a second limiting portion, the paired limiting structure includes a fourth limiting portion, wherein: the second limiting portion is configured as a bolt, the fourth limiting portion is configured as a socket, and the bolt can be at least partially received in the socket; or the second limiting portion is configured with a joint surface, and the fourth limiting portion is configured with a constraint surface for constraining the position of the joint surface; and / or

[0012] The limiting structure includes a locking portion, the paired limiting structure includes a paired locking portion, and the locking portion and the paired locking portion can form a locking connection to fix the relative positions of the first sub-shell and the second sub-shell when the assembly is completed.

[0013] Optionally, according to an embodiment of the present disclosure, the first limiting portion includes the locking portion, the third limiting portion includes the paired locking portion, the locking portion is configured as a hook extending in the direction of the second sub-shell, and the paired locking portion is configured as a receiving portion.

[0014] Optionally, according to an embodiment of the present disclosure, the hook portion of the hook is configured with an inclined portion, the inclined portion can cooperate with the end of the groove and cause the hook to deflect, the hook portion can be snapped into the receiving portion, and the receiving portion is configured as a through hole or a groove.

[0015] Optionally, according to an embodiment of the present disclosure, the clearance between the first limiting portion and the third limiting portion is greater than the clearance between the second limiting portion and the fourth limiting portion.

[0016] Optionally, according to an embodiment of the present disclosure, the joint surface and the constraint surface respectively include one or more of a plane, a curved surface, and a discontinuous surface.

[0017] Optionally, according to an embodiment of the present disclosure, the joint surface includes a first joint surface and a second joint surface that are angled with each other, and the constraint surface includes a first constraint surface and a second constraint surface that are angled with each other, respectively for constraining the positions of the first joint surface and the second joint surface.

[0018] Optionally, according to an embodiment of the present disclosure, a plurality of the limiting structures are arranged oppositely on the first sub-shell, and a plurality of the paired limiting structures are arranged correspondingly on the second sub-shell.

[0019] Optionally, according to an embodiment of the present disclosure, one of the limiting structures is configured with an anti-misalignment structure, and one of the paired limiting structures is configured with a paired anti-misalignment structure. When the first sub-housing and the second sub-housing are assembled, the anti-misalignment structure and the paired anti-misalignment structure are engaged with each other.

[0020] Optionally, according to an embodiment of the present disclosure, the distance between the limiting structure and the paired limiting structure is less than the distance between the connector component and the paired connector component.

[0021] Optionally, according to an embodiment of the present disclosure, the first limiting portion extends outside the first sub-housing, the second limiting portion is formed by a side edge of the first sub-housing, the third limiting portion and the fourth limiting portion are respectively formed by side edges of the second sub-housing, and when viewed from the height direction of the expansion module, when the first sub-housing and the second sub-housing are in an aligned and unassembled state with each other, the distance between the first limiting portion and the third limiting portion is less than the distance between the second limiting portion and the fourth limiting portion, and the distance between the second limiting portion and the fourth limiting portion is less than the distance between the connector component and the paired connector component.

[0022] Optionally, according to an embodiment of the present disclosure, the first limiting portion is formed with a first boss, the second limiting portion is formed with a second boss, the end of the first boss and the third limiting portion can overlap each other, and the end face of the second boss and the fourth limiting portion can overlap each other, so as to define the position when the assembly of the first sub-housing and the second sub-housing is completed, and the side wall of the fourth limiting portion forms a position limit for the first limiting portion.

[0023] Optionally, according to an embodiment of the present disclosure, the expansion module further includes a first circuit board disposed on the first sub-housing and a second circuit board disposed on the second sub-housing, the connector is an inter-board connector, and is electrically connected between the first circuit board and the second circuit board, wherein the connector component is a plug and the paired connector component is a socket.

[0024] Optionally, according to an embodiment of the present disclosure, the plug includes a first plug and a second plug that are electrically connected to each other, the socket includes a first socket constructed on the first circuit board and electrically connected to the first plug and a second socket constructed on the second circuit board and electrically connected to the second plug, wherein when the first sub-housing and the second sub-housing are assembled, the second plug and the second socket form an electrical connection.

[0025] According to another aspect of the present disclosure, a control system is provided, wherein the control system includes a controller, any one of the above expansion modules, and a peripheral device that are communicatively connected. Description of the Drawings

[0026] With reference to the accompanying drawings, the above and other features of the present disclosure will become apparent, wherein

[0027] Figure 1 A perspective view of an expansion module according to the present disclosure is shown;

[0028] Figure 2 A cross-sectional view of an expansion module according to the present disclosure is shown;

[0029] Figure 3 An exploded view of an expansion module according to the present disclosure is shown;

[0030] Figure 4 A mating relationship diagram of a first limiting portion and a third limiting portion of an expansion module according to the present disclosure is shown;

[0031] Figure 5 An enlarged view of an expansion module according to the present disclosure in the region of the first limiting portion and the third limiting portion is shown;

[0032] Figure 6 A perspective view of a first sub-housing of an expansion module according to the present disclosure is shown;

[0033] Figure 7 A perspective view of a second sub-housing of an expansion module according to the present disclosure is shown;

[0034] Figure 8 A plan view of a gap between a second limiting portion and a fourth limiting portion of an expansion module according to the present disclosure is shown;

[0035] Figure 9 A perspective view of a gap between a second limiting portion and a fourth limiting portion of an expansion module according to the present disclosure is shown;

[0036] Figure 10 A cross-sectional view of step one of the assembly of an expansion module according to the present disclosure is shown;

[0037] Figure 11 A cross-sectional view of step two of the assembly of an expansion module according to the present disclosure is shown;

[0038] Figure 12 A cross-sectional view of step three of the assembly of an expansion module according to the present disclosure is shown;

[0039] Figure 13Schematic diagram showing another embodiment of the second limiting portion and the fourth limiting portion of an expansion module according to the present disclosure; and

[0040] Figure 14 Schematic diagram showing another embodiment of the joint surface and the constraint surface of an expansion module according to the present disclosure. Detailed implementation manners

[0041] It is easy to understand that according to the technical solution of the present disclosure, without changing the essence of the present disclosure, those of ordinary skill in the art can propose various interchangeable structural manners and implementation manners. Therefore, the following detailed implementation manners and the accompanying drawings are only exemplary descriptions of the technical solution of the present disclosure, and should not be regarded as all of the present disclosure or as a limitation or restriction on the technical solution of the present disclosure.

[0042] The orientation terms such as up, down, left, right, front, back, front side, back side, top, bottom, etc. mentioned or possibly mentioned in this specification are defined relative to the structures shown in the respective drawings. They are relative concepts, and thus may change accordingly depending on their different positions and different usage states. Therefore, these or other orientation terms should not be construed as restrictive terms. In addition, the terms "first", "second", "third", etc. or similar expressions are only used for descriptive and distinguishing purposes, and should not be understood as indicating or implying the relative importance of the corresponding components.

[0043] Reference Figures 1 to 3 , wherein, Figure 1 Shows a perspective view of an expansion module according to the present disclosure; Figure 2 Shows a cross-sectional view of an expansion module according to the present disclosure; and Figure 3 Shows an exploded view of an expansion module according to the present disclosure.

[0044] The expansion module 100 is used for a control system. Wherein, the expansion module 100 includes a first sub-housing 1, a second sub-housing 2, a limiting device, and a connector. The limiting device includes a limiting structure constructed on the first sub-housing 1 and a paired limiting structure constructed on the second sub-housing 2. The connector includes a connector component 3 and a paired connector component 4. The limiting device is used to limit the relative position between the first sub-housing 1 and the second sub-housing 2 when the first sub-housing 1 and the second sub-housing 2 are assembled, so that the connector component 3 and the paired connector component 4 can be connected to each other.

[0045] The control system should be understood in a broad sense. Through different control methods and strategies, it can achieve stable and accurate control of the controlled object. For example, it can collect signals from peripheral devices via an expansion module, make decisions, and send control instructions to the peripheral devices via the expansion module when necessary. The control system is, for example, a building control system. It should be understood that the building (or house, building) control system can centrally manage, monitor, and control various electromechanical devices in the building. For example, it includes a controller body (or called a superior controller, or generally called a building controller), an expansion module, and peripheral devices. Among them, the control module includes, for example, input and output terminals, serving as a bridge between the peripheral devices and the superior controller. The peripheral devices are, for example, sensors or actuators. In a specific application scenario, the expansion module collects signals from the peripheral devices and outputs them to the superior controller for information processing. The information is, for example, alarm information, abnormal information. More specifically, the information is, for example, that the concentration of carbon dioxide sensed by the sensor is too high. After the controller processes the information and deems it necessary to take countermeasures, it returns the control instruction to the expansion module (which can be the same expansion module or another expansion module). This expansion module then transmits the instruction of the controller to the corresponding actuator for execution. In this example, the actuator is a damper, and the control instruction is to open the damper in order to reduce the concentration of carbon dioxide by ventilation.

[0046] Here, the present technical solution provides a convenient, fast, and reliable connection or assembly method for the connector of the expansion module. The core technical concept is to use a limiting device to restrict the relative positions of the first sub-shell and the second sub-shell during the assembly process (i.e., during the assembly), so that the relative positions of the connector components of the corresponding shells and the mating connector components are restricted. Therefore, the two can be easily matched and connected. Among them, the limiting mechanism of the first sub-shell and the mating limiting structure of the second sub-shell cooperate with each other to achieve limiting. It should be understood that the limiting should be understood in a broad sense, and it can also cover the situation of positioning. Similarly, the connector can be an electrical connector or other components that need to be connected. In addition, the first sub-shell and the second sub-shell can form the outer shell of the expansion module after assembly. It can also be understood that the restriction of the relative positions between these two sub-shells does not strictly require constraints in all six degrees of freedom. For example, usually at least one degree of freedom (such as the Z direction or the height direction) needs to be released to support the development of the assembly process. Those skilled in the art can determine the limiting means of the limiting device for these two sub-shells according to the assembly methods between the sub-shells and between the connectors.

[0047] The present disclosure can facilitate the connection between the connector component and the mating connector component by defining the relative position between the first sub-housing and the second sub-housing during the assembly process of the expansion module. In some embodiments, it can be set that the distance between the limiting structure and the mating limiting structure is less than the distance between the connector component 3 and the mating connector component 4. That is, by limiting the distance, it can be ensured that during the assembly process, the limiting structure and the mating limiting structure are preferentially engaged to restrict the relative position of the first and second sub-housings, thereby facilitating the connection between the connector component and the mating connector component. It can also be understood that there are various implementation methods for the realization of the distance limitation itself. For example, as will be described in detail later, the limiting structure and / or the mating limiting structure can extend towards each other, even extending outside the respective housing, so that the distance between the two is shorter, or the distance between them can be shortened by means of size design, and so on.

[0048] Regarding the specific implementation manner of the limiting device, in some embodiments of the present disclosure, the limiting device includes one or more of pin-hole limiting, snap limiting, concave-convex limiting, baffle limiting, and magnetic limiting.

[0049] Among them, pin hole limiting is achieved through the cooperation of a pin and a hole (pin hole). The pin can be a cylindrical pin or a conical pin, which are respectively suitable for different occasions. The cylindrical pin is suitable for occasions where disassembly and assembly are not required frequently, while the conical pin is suitable for occasions where disassembly and assembly are required frequently. Pin hole limiting ensures accurate limiting of components at a predetermined position through precise fit clearance, preventing the components from shifting or moving during operation, thereby ensuring the accuracy and stability of the equipment; snap limiting is a simple and effective limiting method, which is achieved through the cooperation of a snap part and a mating part, such as having grooves or protruding parts for limiting the position of the part to which it belongs. When the snap part and the mating part are in cooperation, the two form a tight fit through geometric shape and frictional force of the material, thereby restricting the movement range of the part to which it belongs. The snap limiting structure can improve the stability and safety of the equipment; concave-convex limiting can be achieved, for example, by constructing concave-convex shapes on the corresponding components. By designing protruding parts and corresponding recessed parts on the components, when the two components are in cooperation, the protruding parts will insert into the recessed parts, thereby restricting the relative movement of the components. The design of the concave-convex limiting structure can be based on geometric shapes and material properties to achieve an accurate limiting effect. This limiting method can ensure the relative position and stability between components; baffle limiting is a method of restricting the movement range of components by setting baffles in the equipment. The baffle is usually installed at a specific position in the equipment. When the component moves to a predetermined position, the baffle will block the further movement of the component, thereby achieving the limiting function. The design of the baffle limiting structure needs to consider the movement trajectory and limiting requirements of the component to ensure that the component will not collide with the baffle excessively or be damaged during movement. Baffle limiting can protect the equipment and components from accidental damage; magnetic limiting is a method of achieving limiting by using magnetic force. By setting magnetic elements (such as magnets) and components attracted by magnetism (such as iron components) in the equipment, when the component moves to a predetermined position, the magnetic element will attract and fix the component, thereby restricting its further movement. Magnetic limiting has the advantages of simple structure, convenient installation, fast response speed, etc., and can be used in occasions that require fast response and precise positioning. Of course, magnetic limiting is more sensitive to magnetic field changes in the environment, so magnetic field interference problems need to be considered when using it.

[0050] Limiting methods such as pin hole limiting, snap limiting, concave-convex limiting, baffle limiting, and magnetic limiting each have different characteristics and application ranges. In practical applications, those skilled in the art can select a suitable limiting method according to the specific requirements and operating environment of the equipment or system to ensure its normal operation and safety. The specific limiting methods shown will be described in conjunction with the accompanying drawings in the following text.

[0051] From Figure 3 It can be clearly seen that the limiting structure includes a first limiting portion 11 and / or a second limiting portion 12, and the paired limiting structure includes a third limiting portion 21 and / or a fourth limiting portion 22.

[0052] Through the cooperation of the first and third limiting parts, and / or the cooperation of the second and fourth limiting parts, the first and second sub-housings are limited, and further, the limiting and mating connection between the connector component and the mating connector component are realized. The so-called mating clearance refers to the clearance between the corresponding two limiting parts when they are mating with each other. It can be understood that the first limiting part and the third limiting part, and the second limiting part and the fourth limiting part can be constructed in groups respectively, or constructed together, and the object of the present application can be realized. Those skilled in the art can design the limiting parts according to actual needs and the matching method of the limiting parts (select the first and third limiting parts or the second and fourth limiting parts, or select both at the same time), for example, limit the parts according to the above limiting methods (pin-hole limiting, snap-limiting, concave-convex limiting, baffle limiting, magnetic limiting) or the limiting methods described later.

[0053] Exemplarily, in this example, the matching method of the first and third limiting parts and the second and fourth limiting parts is adopted. Among them, the mating clearance between the first limiting part 11 and the third limiting part 21 is greater than the mating clearance between the second limiting part 12 and the fourth limiting part 22. Thus, by limiting the mating clearance between different limiting parts, the effects of rough limiting and fine limiting are achieved. That is to say, this technical solution provides a possibility that during the assembly process of the first and second sub-housings, the rough limiting is first realized through the cooperation of the first and third limiting parts to ensure that the relative positions of the sub-housings are roughly aligned. Thus, this rough limiting can also be understood as a guiding function. Then, the fine positioning is realized through the cooperation of the second and fourth limiting parts to ensure that the relative positions of the sub-housings have high precision and certainty, laying a good foundation for the subsequent connection of the connectors.

[0054] This kind of rough limiting and fine limiting is a way of hierarchical limiting, which has the advantages of improving positioning accuracy, enhancing efficiency, protecting the housing, enhancing system stability, flexibility, and reducing maintenance costs. When necessary, more hierarchical limiting methods can also be set.

[0055] Reference Figure 4 and Figure 5 , wherein, Figure 4 shows a mating relationship diagram of the first limiting part and the third limiting part of an expansion module according to the present disclosure; and Figure 5 shows an enlarged view of an expansion module according to the present disclosure in the area of the first limiting part and the third limiting part.

[0056] The limiting structure includes a locking portion, and the paired limiting structure includes a paired locking portion. The locking portion and the paired locking portion can form a locking connection to fix the relative positions of the first sub-housing 1 and the second sub-housing 2 when the assembly is completed. Thus, through the locking cooperation between the locking portion and the paired locking portion of this technical solution, the relative positions of the first and second sub-housings can be fixed when the assembly is completed, and the effect of restricting the relative positions of these two sub-housings before is also retained, ensuring the stability of the positional relationship between the two when the assembly is completed. It can also be understood that the locking portion and the paired locking portion can be configured in combination with the first and third limiting portions, and / or the second and fourth limiting portions, including the implementation manner of directly integrating such a locking means onto the limiting portion as will be described later, further improving the functionality of the limiting portion.

[0057] For example, the first limiting portion 11 includes the locking portion, and the third limiting portion 21 includes the paired locking portion. Thus, the first and third limiting portions not only have the limiting function but also the locking function. While obtaining the dual functions, the overall compactness is ensured without the need to additionally introduce components. Figure 4 and Figure 5 It can be clearly seen that the locking portion is configured as a hook extending in the direction of the second sub-housing 2, and the paired locking portion is configured as a receiving portion 212. It can be understood that the receiving portion is used to receive the hook, and the receiving portion can be specifically configured as a through hole or a groove, etc., so that the hook can be easily engaged into the receiving portion when the assembly is completed, and it can also prevent the first and second sub-housings from being disassembled undesirably, improving the structural stability.

[0058] At the same time or in some other embodiments, the third limiting portion 21 includes a groove 211, and the groove 211 can at least partially surround the first limiting portion 11.

[0059] It can be seen that this technical solution defines that the first and third limiting parts are in groove fit, such as hook-groove fit. Specifically, in this example, the two inner side surfaces of the groove can surround the outer periphery of the first limiting part when cooperating with the first limiting part, so as to be able to restrict the position of the first limiting part relative to the groove, and thus restrict the relative position between the first sub-shell and the second sub-shell. Here, the cross-section of the groove is L-shaped, which can conveniently achieve the cooperation effect with the first limiting part and is easy to construct. It is also possible to construct the first limiting part as a groove for at least partially surrounding the third limiting part. When the first limiting part includes a hook, since various limiting feasibilities such as pin hole limiting, snap limiting, concave-convex limiting, baffle limiting, and magnetic limiting have been described above, the hook-groove fit of this technical solution can also be classified as snap limiting or concave-convex limiting. It can also be understood that since at the beginning stage of assembly, the first and second sub-shells can be pre-aligned manually or by machine first, the position limiting between the groove and the first limiting part may not be strictly required or designed. However, if necessary, more degrees of freedom of limiting can also be taken for the first limiting part, which will be further described below.

[0060] It is also feasible that the hook part 111 of the hook is provided with an inclined part 1111, and the inclined part 1111 can cooperate with the end part 2111 of the groove 211 to cause the hook to deflect, and the hook part 111 can be snapped into the receiving part 212, and as described above, the receiving part 212 can be constructed as a through hole or a groove, etc.

[0061] This technical solution further refines the design of the hook. It can be seen that during the assembly process of the first sub-shell and the second sub-shell, through the interaction between the inclined part of the hook and the end part of the groove (such as the edge of the groove end) (see Figure 4 ), the hook can be deformed and partially surrounded by the groove. The deformed hook further makes a feeding movement and finally encounters the receiving part, and is snapped into the receiving part by rebounding to complete the receiving of the hook. Here, the third limiting part simultaneously plays the role of rough limiting and deflecting the hook, facilitating the subsequent locking function. In this regard, the hook can be constructed to be elastic to make the above movement proceed smoothly. It should also be known and understood that the inclination direction of the inclined part can be determined according to the relative position relationship and relative movement relationship between the hook and the groove. In this example, the inclined surface of the inclined part inclines towards the direction of the first sub-shell (taking Figure 4From the perspective of [description missing in the original], it slopes upward, forming an acute angle with the end face of the groove to facilitate the deformation of the trigger hook, that is, to avoid, deflect or move. The main body of the hook is exemplarily in the shape of a thin plate, capable of providing elasticity and yielding relatively easily under a certain external force. In addition, the shape and size of the accommodating part can be designed with reference to the hook part of the hook to enable partial accommodation of the hook part or the hook part to hook the accommodating part. Here, the accommodating part is simply configured as a rectangular structure. It should also be understood that the position design of the accommodating part, or the relative position design of the hook part and the accommodating part, can take into account the assembly process of the first and second sub-cases, so that when the hook part and the accommodating part are in cooperation, the first and second sub-cases are also assembled.

[0062] Combined Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 13 , wherein, Figure 6 shows a perspective view of the first sub-case of an expansion module according to the present disclosure; Figure 7 shows a perspective view of the second sub-case of an expansion module according to the present disclosure; Figure 8 shows a plan view of the gap between the second limiting part and the fourth limiting part of an expansion module according to the present disclosure; Figure 9 shows a perspective view of the gap between the second limiting part and the fourth limiting part of an expansion module according to the present disclosure; and Figure 13 shows a schematic view of another embodiment of the second limiting part and the fourth limiting part of an expansion module according to the present disclosure.

[0063] The second limiting part 12 is configured as a plug 125, and the fourth limiting part 22 is configured as a socket 226, and the plug can be at least partially received in the socket.

[0064] Regarding the cooperation method of the plug and the socket, it has been described above. Generally speaking, the cooperation method of the pin and the hole can be made with relatively high precision, so as to ensure the precision and stability of the cooperation, which is suitable for the design concept of precise positioning. Exemplarily, the plug can be configured as a cylindrical shape with a chamfer, and the socket is a round hole, which is simple to manufacture, controllable in cost, and has smooth cooperation.

[0065] The present disclosure also provides a feasibility, that is, the second limiting portion 12 is configured with a joint surface, and the fourth limiting portion 22 is configured with a constraint surface for constraining the position of the joint surface. The precise positioning is achieved by the cooperation between the joint surface and the constraint surface (a surface-to-surface cooperation method). Among them, the surface-to-surface cooperation can provide good structural stability and safety, a simple and fast assembly process, high precision, good durability, certain sealing performance, and controllable maintenance costs. It should be noted that the constraint surface and the joint surface can be constructed vertically or along the height direction of the expansion module, so that the first and second sub-housings are also assembled along the height direction of the expansion module during the assembly process. This up-and-down cooperation method is convenient to control, has low space requirements for the assembly site, and is also convenient for the implementation of rough positioning, precise positioning, and locking functions.

[0066] Specifically, in some embodiments, the joint surface includes a first joint surface 121 and a second joint surface 122 that are angled with each other, and the constraint surface includes a first constraint surface 221 and a second constraint surface 222 that are angled with each other, which are respectively used to constrain the positions of the first joint surface 121 and the second joint surface 122. This technical solution provides two angled constraint surfaces and two corresponding angled joint surfaces, aiming to be able to constrain the relative position relationship between the first and second sub-housings in at least two directions or degrees of freedom. Based on understanding the above technical idea, those skilled in the art can know that multiple groups of such joint surfaces and constraint surfaces can be respectively arranged at different parts of the first and second sub-housings, and the groups cooperate with each other to achieve position constraints in at least two directions or degrees of freedom.

[0067] The positional relationship between the joint surface and the constraint surface can be determined according to the assembly relationship between the first and second sub-housings. In this example, the lower second sub-housing is similar to a base, and the upper first sub-housing is assembled towards the second sub-housing from top to bottom. Therefore, the constraint surface is arranged relatively more outward with respect to the joint surface, so that during the assembly process and the assembled state of these two sub-housings, the second sub-housing can "clamp" the first sub-housing. In this case, the joint surfaces and constraint surfaces of each group can cooperate with each other to achieve a stable assembly relationship. In addition, the joint surface and the constraint surface can be constructed in the form of flat straight surfaces parallel to each other, so that the cooperation relationship and assembly relationship between the two can be more easily controlled and can also be coordinated with the cooperation method of the sub-housing.

[0068] Combined Figure 6 and Figure 7 , a plurality of the limiting structures are oppositely arranged on the first sub-housing 1, and a plurality of the paired limiting structures are correspondingly arranged on the second sub-housing 2. Among them, in Figure 6 and Figure 7Among them, the limiting structure takes the second limiting part as an example, and the paired limiting structure takes the fourth limiting part as an example for illustration. Specifically, in Figure 6 and Figure 7 , the second limiting part 12 and the fourth limiting part 22 correspondingly arranged with the second limiting part 12 are respectively marked at the lower right corners, and in Figure 6 , the second limiting part 12' arranged opposite to the second limiting part 12 is marked at the upper left corner, and in Figure 7 , the fourth limiting part 22' correspondingly arranged with the second limiting part 12' is marked at the upper left corner. Thus, in combination with the technical purpose of this solution, the description in the specification including the expression in the drawings, those skilled in the art should understand the meanings of being opposite and corresponding and be able to implement accordingly. For example, taking the perspective of Figure 6 as an example, the first sub-shell has a generally rectangular shape, the second limiting part 12 at the lower right corner and the second limiting part 12' at the upper left corner are arranged at the diagonals of the rectangle to form opposition, the fourth limiting part 22 is correspondingly arranged at the lower right corner of the second sub-shell with the second limiting part 12, and the fourth limiting part 22' is correspondingly arranged at the upper left corner of the second sub-shell with the second limiting part 12' so as to play a limiting role in cooperation with each other. In some other implementation forms, the second limiting part 12 can be arranged on one surface of the first sub-shell (for example, one side of a rectangle), then the second limiting part 12' is arranged on the opposite surface of the first sub-shell for convenient limiting.

[0069] Combined with Figure 14 , it shows a schematic diagram of another implementation manner of the joint surface and the constraint surface of an expansion module according to the present disclosure. Regarding the specific design forms of the joint surface and the constraint surface, exemplarily, the joint surface and the constraint surface respectively include a plane (see Figure 3 ), a curved surface (see Figure 14 , which exemplarily shows an arc surface as the curved surface or a part thereof), one or more of discontinuous surfaces. Among them, the discontinuous surface can refer to a surface that is not smooth in the mathematical sense or a geometrically disconnected surface. For example, the first and second joint surfaces are disconnected, and the first and second constraint surfaces are disconnected. Thus, in the case of disconnection, the two disconnected surfaces can be respectively arranged at different parts of the shell. For example, the disconnected joint surface includes a first joint surface and a second joint surface. Among them, the first joint surface is, for example, oppositely arranged at a part of the first sub-shell, and the second joint surface is oppositely arranged at another part of the first sub-shell, and the constraint surfaces are correspondingly arranged, so that position constraints can be realized respectively in different degrees of freedom. The meanings of being opposite and corresponding have been explained above. These design forms can all provide position constraints in at least two degrees of freedom. In addition, the number and shape of the joint surface and the constraint surface can also be set according to factors such as the structural shape and size of the first and second sub-shells themselves.

[0070] Figure 8 andFigure 9 The gap G between the joint surface and the constraint surface is schematically marked respectively, aiming to indicate that a small clearance fit can be formed therebetween, and in this way, the relative positional relationship between the sub-shells can be accurately defined. The specific value of the gap can be determined in consideration of the connection tolerance allowed for the connector to be connected. In this example, as will be described later, the connector component and the mating connector component can be the plug and socket of a board-to-board connector, and the assembly tolerance between the two is, for example, 0.5 mm, that is to say, they can be smoothly joined when the alignment distance between the two is less than or equal to 0.5 mm. Therefore, the gap G between the joint surface and the constraint surface is less than 0.5 mm, and in this example, a small clearance fit of 0.15 mm is achieved, so that the assembly requirements of the connector can be easily, flexibly and redundantly met.

[0071] Combined with Figure 3 It can also be seen that the first sub-shell 1 and the second sub-shell 2 both have a rectangular shape, the first joint surface 121 and the second joint surface 122 are perpendicular to each other, the first constraint surface 221 and the second constraint surface 222 are perpendicular to each other, and the second limiting portion 12 and the fourth limiting portion 22 are respectively constructed at the diagonals of the first sub-shell 1 and the second sub-shell 2.

[0072] It should be noted that the rectangle here does not strictly require that the first sub-shell and the second sub-shell must have a rectangle in the strict mathematical sense, but it can generally be presented as a rectangle, or have a structure similar to a rectangle. For example, a square structure can be seen on the whole of the sub-shell, with expressions in two directions of length and width, and four corners can be seen, and each corner is basically a right angle. On this basis, in some embodiments, the joint surface and the constraint surface can be considered as part of the corners of the rectangle, so as to make good use of the characteristics of the rectangle itself, optimize the space utilization, and do not affect the layout of other components in the internal space of the rectangle. By the way that the first and second joint surfaces and the first and second constraint surfaces are perpendicular to each other respectively, a tight fit between the sub-shells can be achieved specifically in the length and width directions, and it does not affect the assembly progress of the first sub-shell with the second sub-shell in the height direction.

[0073] It should also be understood that the arrangement of the second limiting portion and the fourth limiting portion at the diagonals respectively is not exclusive. In some design schemes, the second limiting portion and the fourth limiting portion can be respectively constructed at a pair of diagonal corners of the corresponding sub-shell (there are two choices of arrangement positions, that is, Figure 6 and Figure 7From the perspective of , a set of limiting parts is constructed at the lower right corner and the upper left corner, or a set of limiting parts is constructed at the upper right corner and the lower left corner); in some other design solutions, the second limiting part and the fourth limiting part can be respectively constructed at the four corners, which can have better assembly stability and uniform force. Those skilled in the art can select which design form based on reasons such as comprehensive performance and cost. Similarly, the first limiting part and the third limiting part can also be respectively arranged at or near the diagonal, totaling two pairs or four pairs.

[0074] It should be understood that during the assembly process of the sub-housing, the process of rough positioning can be triggered first, then the process of fine positioning can be triggered, and finally the connection between the connector component and the mating connector component can be achieved. This can be achieved, for example, through the design of the relative position relationship between the corresponding limiting parts and the connector.

[0075] Specifically, the first limiting part 11 extends outside the first sub-housing 1, the second limiting part 12 is formed by the side of the first sub-housing 1, the third limiting part 21 and the fourth limiting part 22 are respectively formed by the side of the second sub-housing 2, and when viewed from the height direction of the expansion module 100, when the first sub-housing 1 and the second sub-housing 2 are in a state of being aligned with each other and not yet assembled, the distance between the first limiting part 11 and the third limiting part 21 is less than the distance between the second limiting part 12 and the fourth limiting part 22, and the distance between the second limiting part 12 and the fourth limiting part 22 is less than the distance between the connector component 3 and the mating connector component 4.

[0076] Among them, the first limiting part extends outside the first sub-housing. For example, it extends outside the first sub-housing along the assembly direction towards the second sub-housing, which can reduce the distance between the first limiting part and the third limiting part, so that the process of rough positioning is triggered first. That is, during the process of assembling the first sub-housing onto the second sub-housing from top to bottom, due to the design of the above distance, the first limiting part and the third limiting part first cooperate to achieve rough positioning. Then the second limiting part and the fourth limiting part cooperate to achieve fine positioning. Finally, when the relative position relationship between the first and second sub-housings has been well defined, the relative position relationship between the connector component and the mating connector component is also well defined, and the two complete the connection. Figure 3In one form, it can be conveniently achieved by setting the length of the hook. In addition, by forming the corresponding limiting part from the side of the sub-shell, the existing resources of the sub-shell can be fully utilized, without adding extra components, controlling the cost and improving the compatibility of the solution, which has the same effect as the previous solution of setting the limiting part at a right angle at the corner. The advantage of this design is also that since the connector component and the mating connector component are usually arranged within the accommodating space formed between the sub-shells, the limiting part located at the side is likely to be triggered first to realize the correct assembly process. In this regard, the limiting parts can be opposed to each other, or formed by the opposed side parts, so as to better support this priority triggering mechanism. When necessary, the length of the hook or the position or size of the limiting part can also be adjusted to ensure that the assembly process can be carried out correctly, and the layout position or size between the connector component and the mating connector component can also be adjusted.

[0077] In addition to the first and third limiting parts and the second and fourth limiting parts corresponding to form precise limits, the present disclosure also designs other linkage effects between these two groups of limiting parts. In some embodiments of the present disclosure, the first limiting part 11 is formed with a first boss 112, the second limiting part 12 is formed with a second boss 124, the first boss 112 and the end 2111 of the third limiting part 21 can overlap each other, and the second boss 124 and the end face 224 of the fourth limiting part 22 can overlap each other, so as to limit the position when the assembly of the first sub-shell 1 and the second sub-shell 2 is completed, and the side wall 225 of the fourth limiting part 22 forms the position limit of the first limiting part 11.

[0078] According to this technical solution, the present disclosure establishes the linkage relationships in terms of the positional relationships among the first limiting part and the third limiting part, the second limiting part and the fourth limiting part, and the fourth limiting part and the first limiting part. Specifically, the first boss of the first limiting part and the second boss of the second limiting part can overlap with the end side of the third limiting part and the end face of the fourth limiting part respectively when the sub-shells are assembled, and the overlapping of the first and second bosses with the end side and the end face limits the end position of the assembly of the sub-shells. In this case, it can also be understood that the hook can be engaged with the accommodating part at this time, and the connector component can form an engagement with the mating connector component. In this regard, the lengths or positions of the limiting parts and the connector should be reasonably designed so that when the sub-shells are assembled, the corresponding limiting parts reach the terminal positions where they cooperate with each other and the connector is connected, while also considering the triggering time sequence of the rough limit, the precise limit and the connector connection. For example, the triggering time sequence is obtained by limiting the spacing between the limiting parts or the connectors, and the limit of the assembly end position is obtained by designing the sizes of the limiting parts and the connector.

[0079] The design scheme cleverly utilizes the structure of the limiting part itself to achieve the limitation of the assembly end position and the limitation of some degrees of freedom of the first limiting part, expands the capability range of the limiting part, and does not introduce additional components, thus controlling the cost. Therefore, the first limiting part can be restricted by the side walls of the second limiting part and the fourth limiting part at the same time, further improving the limiting accuracy between the first limiting part and the second limiting part, and providing a reliable basis for subsequent precise positioning and assembly. This overlapping method of the boss and the end / end face can be understood as a stepped overlapping fit. Those skilled in the art can design more such fits at other positions in a similar manner to improve the limiting effect of the assembly completion position. For example, a step is provided on the inner side wall of the third limiting part and overlaps with the end face of the second limiting part, and so on.

[0080] Combined with Figure 3 , in some embodiments of the present disclosure, one of the limiting structures is configured with an anti-misassembly structure 123, and one of the paired limiting structures is configured with a paired anti-misassembly structure 223. When the first sub-shell 1 and the second sub-shell 2 are assembled, the anti-misassembly structure 123 and the paired anti-misassembly structure 223 are engaged with each other.

[0081] This anti-misassembly technology is sometimes also referred to as Pokayoke, anti-fooling technology, etc. Its purpose is to ensure the uniqueness of the assembly relationship between the first sub-shell and the second sub-shell, that is, the two can only be assembled in a specified assembly manner. Figure 3For example, a second limiting portion is configured with an anti-misalignment structure, such as in the form of a notch, and a corresponding fourth limiting portion is configured with a mating anti-misalignment structure, such as in the form of a protrusion, while other second and fourth limiting portions do not have similar structures. Therefore, if the assembly relationship between the first sub-shell and the second sub-shell is incorrect (for example, the first sub-shell is rotated by 90 or 180 degrees), then the protrusion of the fourth limiting plate will hit the end face of the second limiting portion, preventing the continuation of the assembly movement of the first sub-shell, and thus being able to prompt the installer to adjust the relative position relationship of the sub-shells correctly. In the case of the correct position relationship, combined with the design of rough limiting, the protrusion can be more smoothly engaged into the notch. Of course, the ownership relationship between the notch and the protrusion can be interchanged, and the same technical effect can be achieved. In addition, this anti-misalignment technology endows the corresponding second limiting portion and fourth limiting portion with an additional anti-misalignment function, making the two have dual or triple functions, without introducing new components into the structure of the entire expansion module. It is also feasible to apply the anti-misalignment technology to the cooperation between the first limiting portion and the third limiting portion. For example, when the third limiting portion includes a groove or when the first limiting portion includes a hook, anti-misalignment can be achieved by setting the size of the groove (such as the width of the groove opening) or the size of the hook, such as making one set of the groove and the hook smaller or making one set of the hook and the groove larger. In this way, when the assembly relationship between the first and second sub-shells is incorrect, the ungrouped hook and groove cannot be matched, to prompt that the correct assembly relationship needs to be adjusted.

[0082] This technical solution can also be understood as a concept of asymmetric design to achieve the anti-misalignment effect. In addition to asymmetric design, color differentiation, identification anti-misalignment, or introducing intelligent devices (such as sensors) can also be used to achieve anti-misalignment. The anti-misalignment methods can be selected and combined according to factors such as manufacturing feasibility, operation feasibility, and use reliability of the anti-misalignment methods according to specific application scenarios and requirements, so as to achieve the best anti-assembly error effect.

[0083] The expansion module 100 further includes a first circuit board 13 arranged on the first sub-shell 1 and a second circuit board 23 arranged on the second sub-shell 2. The connector is an inter-board connector and is electrically connected between the first circuit board 13 and the second circuit board 23. Among them, the connector component 3 is a plug, and the mating connector component 4 is a socket.

[0084] As described above, the circuit board can also be regarded as a printed circuit board assembly, for example, supporting the input and output functions of an expansion module, especially bridging between an upper controller and a peripheral device. In addition, a board-to-board connector, sometimes also called a B2B (Board to Board) connector or a board-to-board connector, is mainly characterized by its strong transmission ability. Here, the board-to-board connector has a plug as a connector component and a matching socket as a mating connector component. Among them, the plug can be directly or indirectly connected to one of the circuit boards, and the socket is electrically connected to another circuit board. Also as described above, the plug and socket of the board-to-board connector can allow an assembly tolerance of up to 0.5 mm (in the length and width directions), and the exemplary technical solution of the present disclosure can achieve a precise limit position of 0.15 mm. Therefore, it can support the correct assembly position of the plug and socket and avoid misalignment beyond the allowable range during the assembly process.

[0085] Further, the plug includes a first plug 31 and a second plug 32 that are electrically connected to each other. The socket includes a first socket 41 constructed on the first circuit board 13 and electrically connected to the first plug 31, and a second socket 42 constructed on the second circuit board 23 and electrically connected to the second plug 32. Among them, when the first sub-shell 1 and the second sub-shell 2 are assembled, the second plug 32 and the second socket 42 form an electrical connection.

[0086] Thus, the board-to-board connector is composed of a first socket and a first plug electrically connected to the first circuit board, and a second socket and a second plug electrically connected to the second circuit board, and the two plugs facing each other are also electrically connected. Thus, after the connector is assembled, electrical connection between the circuit boards can be achieved. Among them, the first plug and the second plug can also be regarded as a total plug component. The present disclosure does not make special restrictions on the specific shape or number of the plug and the socket. Exemplarily, the plug can have several pins and an outer protective shell, while the socket can be welded to the corresponding circuit board and has several jacks corresponding to the pins. It can also be understood that the design of the circuit board and the board-to-board connector is exemplary, and those skilled in the art can use the limiting relationship between the sub-shells in the present disclosure to connect other components that need to be connected.

[0087] Next, refer to Figure 10 、 Figure 11 and Figure 12 and in combination with Figure 2 、 Figure 4 to briefly describe the assembly process of an embodiment of the present disclosure. Among them, Figure 10 shows a cross-sectional view of the first step of the assembly of an expansion module according to the present disclosure; Figure 11 shows a cross-sectional view of the second step of the assembly of an expansion module according to the present disclosure; and Figure 12Shows a cross-sectional view of the third assembly step of an expansion module according to the present disclosure.

[0088] First, in the disassembled state, the connector component and the mating connector component are installed on their respective sub-housings. For example, the first plug, the first socket, and the second plug are directly or indirectly arranged on the first circuit board together, and the second socket is arranged on the second circuit board. The first housing and the second housing are roughly aligned in the height direction manually or by automation, and attention should be paid to the correct alignment of the anti-misalignment structure. Then, the first housing is gradually moved downward towards the second housing, and the coarse limit is triggered, that is, the inclined part of the hook collides with the edge of the end face of the third limit part ( Figure 10 ), and the hook is gradually limited by the groove of the third limit part ( Figure 4 ) and the side wall of the fourth limit part. Thus, the general positions (length and width directions) of the first and second sub-housings are initially aligned.

[0089] The first sub-housing continues to move downward towards the second sub-housing. The hook is deformed or deflected due to the contact between the inclined part and the edge, and the engaging surface of the second limit part and the constraining surface of the fourth limit part start to cooperate to trigger the fine limit ( Figure 11 ). At this time, there is still a certain distance between the second plug and the second socket in the height direction, but in the length and width directions, due to the design of the fine limit, the position error is guaranteed to be within the allowable range.

[0090] The first sub-housing continues to move downward towards the second sub-housing, and the second plug and the second socket start to engage ( Figure 12 ). Due to the above-mentioned fine limit relationship, the two can engage smoothly. As the first sub-housing continues to move, the hook can finally engage into the receiving part or hook the receiving part, and the first boss of the first limit part and the end side of the third limit part, as well as the second boss of the second limit part and the end face of the fourth limit part overlap, defining the assembled completion position of the first and second sub-housings. At the same time, the second plug and the second socket also complete the final engagement ( Figure 2 ).

[0091] It can be seen that through the guiding function of the coarse limit and the role of the fine limit in the process of sub-housing assembly, the installation accuracy between the plug and the socket of the connector is achieved, and the installer can assemble the sub-housing more simply, saving the production cycle of the production line.

[0092] According to another aspect of the present disclosure, the present disclosure also relates to a control system, wherein the control system includes a controller, any one of the above expansion modules 100, and a peripheral device that are communicatively connected. Regarding the features of the controller, peripheral device, etc., exemplary explanations have been given at the beginning of the detailed implementation, and will not be repeated here. Thus, the building control system of the present disclosure can inherit various implementation manners of the expansion module and can achieve corresponding technical effects. It should be understood that in the case where the control system is a building control system, the controller is a building controller.

[0093] It should be understood that all of the above preferred embodiments are exemplary rather than restrictive, and various modifications or deformations made by those skilled in the art to the specific embodiments described above under the concept of the present disclosure should be within the legal protection scope of the present disclosure.

Claims

1. An expansion module (100) for a control system, characterized in that, The extension module (100) includes a first sub-housing (1), a second sub-housing (2), a limiting device, and a connector. The limiting device includes a limiting structure formed on the first sub-housing (1) and a mating limiting structure formed on the second sub-housing (2). The connector includes a connector component (3) and a mating connector component (4). The limiting device is used to limit the relative position between the first sub-housing (1) and the second sub-housing (2) when the first sub-housing (1) and the second sub-housing (2) are assembled, so that the connector component (3) and the mating connector component (4) can be connected to each other.

2. The expansion module (100) according to claim 1, wherein The limiting device includes one or more of pin hole limiting, snap limiting, concave-convex limiting, baffle limiting, and magnetic limiting.

3. The extension module (100) according to claim 1, wherein the limiting structure includes a first limiting portion (11), the mating limiting structure includes a third limiting portion (21), the third limiting portion (21) includes a groove (211), and the groove (211) can at least partially surround the first limiting portion (11); and / or the limiting structure includes a second limiting portion (12), the mating limiting structure includes a fourth limiting portion (22), wherein: the second limiting portion (12) is configured as a plug (125), the fourth limiting portion (22) is configured as a socket (226), and the plug (125) can be at least partially received in the socket (226); or the second limiting portion (12) is configured with a joint surface, and the fourth limiting portion (22) is configured with a constraint surface for constraining the position of the joint surface; and / or the limiting structure includes a locking portion, the mating limiting structure includes a mating locking portion, and the locking portion and the mating locking portion can form a locking connection to fix the relative position between the first sub-housing (1) and the second sub-housing (2) when the assembly is completed.

4. The expansion module (100) according to claim 3, characterized in that, The first limiting portion (11) includes the locking portion, the third limiting portion (21) includes the mating locking portion, the locking portion is configured as a hook extending in the direction of the second sub-housing (2), and the mating locking portion is configured as a receiving portion (212).

5. The expansion module (100) according to claim 4, characterized in that, The hook portion (111) of the hook is configured with an inclined portion (1111), the inclined portion (1111) can cooperate with the end portion (2111) of the groove (211) and cause the hook to deflect, and the hook portion (111) can be snapped into the receiving portion (212), and the receiving portion (212) is configured as a through hole or a groove.

6. The expansion module (100) according to claim 3, characterized in that, The fitting clearance between the first limiting portion (11) and the third limiting portion (21) is greater than the fitting clearance between the second limiting portion (12) and the fourth limiting portion (22).

7. The expansion module (100) according to claim 3, characterized in that, The joint surface and the constraint surface respectively include one or more of a plane, a curved surface, and a discontinuous surface.

8. The expansion module (100) according to claim 7, characterized in that, The joint surface includes a first joint surface (121) and a second joint surface (122) that are angled with respect to each other. The constraint surface includes a first constraint surface (221) and a second constraint surface (222) that are angled with respect to each other, and are respectively used to constrain the positions of the first joint surface (121) and the second joint surface (122).

9. The expansion module (100) according to claim 1, characterized in that, A plurality of the limiting structures are oppositely arranged on the first sub-shell (1), and a plurality of the paired limiting structures are correspondingly arranged on the second sub-shell (2).

10. The expansion module (100) according to claim 9, characterized in that, One of the limiting structures is configured with an anti-misalignment structure (123), and one of the paired limiting structures is configured with a paired anti-misalignment structure (223). When the first sub-shell (1) is assembled with the second sub-shell (2), the anti-misalignment structure (123) engages with the paired anti-misalignment structure (223).

11. The expansion module (100) according to claim 1, characterized in that, The distance between the limiting structure and the paired limiting structure is less than the distance between the connector component (3) and the paired connector component (4).

12. The expansion module (100) according to claim 3, characterized in that, The first limiting portion (11) extends outside the first sub-shell (1), the second limiting portion (12) is formed by the side of the first sub-shell (1), the third limiting portion (21) and the fourth limiting portion (22) are respectively formed by the sides of the second sub-shell (2), and when viewed from the height direction of the expansion module (100), when the first sub-shell (1) and the second sub-shell (2) are aligned with each other and not yet assembled, the distance between the first limiting portion (11) and the third limiting portion (21) is less than the distance between the second limiting portion (12) and the fourth limiting portion (22), and the distance between the second limiting portion (12) and the fourth limiting portion (22) is less than the distance between the connector component (3) and the paired connector component (4).

13. The expansion module (100) according to claim 3, characterized in that, The first limiting portion (11) is formed with a first boss (112), the second limiting portion (12) is formed with a second boss (124), the first boss (112) and the end (2111) of the third limiting portion (21) can overlap each other, and the second boss (124) and the end face (224) of the fourth limiting portion (22) can overlap each other, thereby defining the position when the assembly of the first sub-shell (1) and the second sub-shell (2) is completed, and the side wall (225) of the fourth limiting portion (22) forms a position limit for the first limiting portion (11).

14. The expansion module (100) according to any one of claims 1 to 13, characterized in that, The expansion module (100) further includes a first circuit board (13) arranged on the first sub-shell (1) and a second circuit board (23) arranged on the second sub-shell (2). The connector is an inter-board connector and is electrically connected between the first circuit board (13) and the second circuit board (23), wherein the connector component (3) is a plug and the paired connector component (4) is a socket.

15. The expansion module (100) according to claim 14, characterized in that, The plug includes a first plug (31) and a second plug (32) that are electrically connected to each other. The socket includes a first socket (41) constructed on the first circuit board (13) and electrically connected to the first plug (31), and a second socket (42) constructed on the second circuit board (23) and electrically connected to the second plug (32). Wherein, when the first sub-shell (1) and the second sub-shell (2) are assembled, the second plug (32) and the second socket (42) form an electrical connection.

16. A control system, characterized in that, The control system includes a controller in communication connection, an expansion module (100) according to any one of claims 1 to 15, and a peripheral device.

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