Connecting and fixing mechanism for PLC equipment shell and mounting guide rail

Abstract

The invention discloses a connecting and fixing mechanism for a PLC equipment shell and an installation guide rail, and relates to the related technical field of electrical equipment installation structures, and the mechanism comprises a shell, a first buckle, a second buckle and a linkage assembly. The shell is provided with a guide rail installation groove, the first buckle and the second buckle are installed in the shell in a back-to-back sliding mode, the opposite ends of the first buckle and the second buckle are provided with the first clamping head and the second clamping head respectively, the linkage assembly is rotatably installed on the shell and is in transmission connection with the two buckles at the same time, the linkage assembly is operated to rotate, the two buckles can be synchronously driven to slide back to back, and therefore the two clamping heads retract to be unlocked. According to the invention, the double buckles are controlled in a linkage manner through a single operation part, the tool-free and one-button type quick mounting and dismounting of the PLC equipment on the guide rail are realized, the operation is labor-saving, the reliable self-locking is realized by utilizing a positioning structure between the buckles, and the efficiency and safety of mounting and maintenance are effectively improved.

Description

Technical Field

[0001] This invention relates to the technical field of electrical equipment installation structures, specifically to a connection and fixing mechanism between a PLC equipment housing and a mounting rail. Background Technology

[0002] In the field of industrial automation, programmable logic controllers (PLCs) and their modules are generally installed on standard DIN rails inside control cabinets via snap-fit ​​mechanisms on their housings to achieve modular layout and rapid maintenance. Traditional rail mounting methods have the following drawbacks: First, common snap-fit ​​mechanisms often involve a single movable snap-fit ​​combined with a fixed snap-fit. During installation, the equipment must be tilted so that the fixed side snaps in first, then the movable side is pressed down. This is not only cumbersome but also requires specific installation space and cannot achieve quick, straight-up / down installation and removal. Second, some designs use dual movable snap-fit ​​mechanisms, which allow for vertical installation, but disassembly requires simultaneously prying both snap-fits apart, which is laborious and particularly inconvenient in confined spaces. Third, some designs use additional lifting or actuating components to control both snap-fits simultaneously, but the locking state relies on manual reset. If the reset is forgotten after installation, there is a safety hazard of the equipment accidentally falling off the rail. Therefore, there is an urgent need for a connection and fixing mechanism that allows for convenient vertical installation and disassembly, reliable self-locking, labor-saving operation, and requires no additional tools. Summary of the Invention

[0003] The purpose of this invention is to provide a connection and fixing mechanism between the PLC equipment housing and the mounting rail, which achieves synchronous action of the two-sided latches and reliable locking through a single operation.

[0004] To achieve the above objectives, the present invention provides a connection and fixing mechanism between a PLC equipment housing and a mounting rail, comprising: The housing has a guide rail mounting groove for accommodating the mounting rail; The first buckle is slidably installed in the housing along the first direction, and one end of the buckle is provided with a first snap-fit ​​connector for engaging with one side of the guide rail. The second buckle is slidably installed in the housing along a second direction opposite to the first direction, and one end of the buckle is provided with a second snap connector for engaging with the other side of the guide rail; A linkage component is rotatably mounted on the housing, and the linkage component is simultaneously connected to the first latch and the second latch in a transmission manner; The linkage component is configured to drive the first buckle to slide along the first direction and simultaneously drive the second buckle to slide along the second direction, so that the first buckle and the second buckle retract or extend synchronously from the guide rail mounting groove.

[0005] A further technical solution is provided with a positioning structure that cooperates with each other on the opposite sides of the first buckle and the second buckle; the positioning structure includes a protrusion on the first buckle and a first recess and a second recess spaced apart along the sliding direction on the second buckle.

[0006] In a further technical solution, the first buckle is provided with a limiting block, and the second buckle is provided with a limiting groove, wherein the limiting block extends into the limiting groove.

[0007] A further technical solution is that the linkage component is a third buckle comprising: A rotating sleeve is rotatably mounted on the housing; Two inserts are fixedly mounted on the rotating sleeve; The lever is fixedly mounted on the rotating sleeve and exposed outside the housing; The first latch has a first slot for inserting one of the plugs, and the second latch has a second slot for inserting the other plug.

[0008] A further technical solution also includes a first elastic element, which is disposed between the housing and the second buckle, for providing a biasing force to the second snap-fit ​​connector toward the guide rail mounting groove.

[0009] In a further technical solution, the housing is provided with a first sliding groove, the second buckle is slidably disposed in the first sliding groove, the first sliding groove is provided with a first baffle, and the first elastic member abuts between the first baffle and the second buckle.

[0010] A further technical solution also includes a second elastic element, which is disposed between the housing and the first buckle, for providing a biasing force to the first snap-fit ​​connector toward the guide rail mounting groove.

[0011] In a further technical solution, the housing is provided with a second sliding groove, the first buckle portion is slidably disposed in the second sliding groove, the second sliding groove is provided with a second baffle, and the second elastic member abuts between the second baffle and the first buckle.

[0012] In a further technical solution, both the first and second snap-fit ​​connectors have guide slopes on the side facing the guide rail mounting groove. In a further technical solution, a fixed shaft is fixed inside the first groove, and the rotating sleeve is rotatably sleeved on the fixed shaft.

[0013] In summary, the present invention has the following beneficial effects: Compared with the prior art, the connection and fixing mechanism provided by the present invention has the following significant beneficial effects: Extremely simple to operate, enabling tool-free quick assembly and disassembly: A single lever controls the linkage components, simultaneously driving the two latches to lock or unlock. During installation, simply align the housing with the guide rail and press down; the latches automatically retract under the guide of the inclined surface, and then automatically lock by flicking the lever. For disassembly, pressing down the lever with one hand disengages both latches simultaneously. The entire process requires no screwdrivers or other tools, and eliminates the need for forceful pressing or simultaneous operation of two components, significantly reducing operational difficulty and effort.

[0014] Compact and reliable structure, integrating linkage and self-locking: It innovatively combines a rotary-driven linkage component with a concave-convex positioning structure between the latches. The rotation of the linkage component (such as the third latch) efficiently converts the rotational motion into precise back-to-back linear motion of the two latches through the cooperation of the insert and slot, resulting in direct transmission and a compact structure. The engagement of the protruding point with different recesses not only provides a clear "click" tactile feedback to indicate the locked / unlocked status but also constitutes a mechanical self-locking mechanism, effectively preventing accidental loosening of the mechanism under vibration or accidental contact, ensuring the stability and safety of the equipment connection on the guide rail.

[0015] Automatic reset and guidance enhance installation experience and success rate: The elastic element between the latch and the housing provides continuous bias pressure (or elastic reset force) to the latch, causing it to tend to automatically reset after unlocking or in the initial state, simplifying the operation process. Simultaneously, the guide ramp on the latch allows for smooth latch opening and sliding into the mounting slot during the initial installation phase simply by pressing the housing vertically downwards, achieving true "straight up and down" installation. This reduces installation space requirements and is particularly suitable for densely packed control cabinet environments. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a three-dimensional structural diagram of this application; Figure 2 This is the front view of this application; Figure 3 This is a schematic diagram of the housing after removing the first, second, and third clips of this application; Figure 4 This is a schematic diagram of the combination of the first, second, and third clips of this application; Figure 5 This is a three-dimensional schematic diagram of the first buckle in this application; Figure 6 This is a first three-dimensional schematic diagram of the second buckle in this application; Figure 7This is a second three-dimensional schematic diagram of the second buckle in this application; Figure 8 This is a three-dimensional schematic diagram of the third buckle in this application; Figure 9 This is a diagram illustrating the locked, pending installation state of this application; Figure 10 This is a diagram illustrating the unlocked status of this application; In the diagram: 100, housing; 110, guide rail mounting groove; 120, first slide groove; 121, first baffle; 122, fixed shaft; 123, guide surface; 130, second slide groove; 131, second baffle; 140, third slide groove; 200, first buckle; 201, first snap-fit ​​connector; 202, first slot; 203, protruding point; 204, limiting block; 205, second elastic element; 300, second buckle; 301, second snap-fit ​​connector; 302, first recess; 303, second recess; 304, limiting slide groove; 305, first elastic element; 306, second slot; 400, third buckle; 401, rotating sleeve; 402, insert block; 403, lever block; 404, through hole; Detailed Implementation To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0018] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0019] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0021] like Figures 1-10 As shown, this embodiment of the invention provides a connection and fixing mechanism between the PLC equipment housing and the mounting rail, aiming to provide a manual quick installation and disassembly solution that does not require tools, is labor-saving, and has a clear status. The connecting and fixing mechanism mainly includes a housing 100, a first buckle 200, a second buckle 300, and a third buckle 400.

[0022] The housing 100 is the main frame of the mechanism and is usually made of insulating engineering plastic. Its side has a guide rail mounting groove 110 for accommodating standard DIN mounting rails. The cross-section of the guide rail mounting groove 110 is preferably G-shaped or U-shaped to match the shape of the guide rail. In this embodiment, a U-shaped shape is selected to ensure the initial positioning during installation.

[0023] The housing 100 is also machined with a first sliding groove 120, a second sliding groove 130 and a third sliding groove 140 on its side. The first sliding groove 120 and the second sliding groove 130 are located on both sides of the guide rail mounting groove 110, and the third sliding groove 140 is located between the first sliding groove 120 and the second sliding groove 130, and is the inwardly recessed part of the third sliding groove 140. The first sliding groove 120, the second sliding groove 130 and the third sliding groove 140 are used to guide and restrict the sliding of the first buckle 200 and the second buckle 300.

[0024] The first buckle 200 is divided into three parts. The first part is slidably installed in the first slide groove 120, the second part is slidably installed in the third slide groove 140, and the third part is slidably installed in the second slide groove 130. The first part and the third part are located at both ends, and the second part is located in the middle. The first buckle 200 is fixed with a first locking connector 201 at one end in the second slide groove 130, that is, the first locking connector 201 is fixedly set on the third part. The first locking connector 201 can follow the sliding of the first buckle 200 and move closer to the guide rail mounting groove 110 to be inserted into the locking groove of the guide rail. The other end of the first buckle 200 opposite to the first locking connector 201 is provided with a first slot 202, that is, it is set on the first part of the first buckle 200, for cooperating with the third buckle 400.

[0025] Specifically, a protruding point 203 and a limiting block 204 are provided on the side of the first buckle 200 for cooperating with the second buckle 300. The protruding point 203 is a smooth curved surface that cooperates with the second buckle 300. In this embodiment, there are two protruding points 203. The protruding point 203 and the limiting block 204 are also provided on the first part of the first buckle 200.

[0026] The second latch 300 is slidably accommodated within the second slide groove 130, and the second latch 300 can slidably engage with the first latch 200. A second locking connector 301 is provided on the side of the second latch 300 near the guide rail mounting groove 110. The second locking connector 301 is positioned opposite to the first locking connector 201 of the first latch 200, meaning the second locking connector 301 and the first locking connector 201 are located on opposite sides of the guide rail mounting groove 110. Figure 2 The second latch 301 and the first latch 201 are respectively used to insert into the locking grooves on both sides of the guide rail. On the side of the second latch 300 facing the first latch 200, there is a first recess 302 and a second recess 303. The first recess 302 and the second recess 303 are arranged along the sliding direction of the second latch 300 and are used to engage with the protrusion 203. The mating surfaces of the first recess 302 and the second recess 303 with the protrusion 203 are smooth curved surfaces. For example, when the second latch 300 slides on the first latch 200, the protrusion 203 can be engaged in the first recess 302. At this time, it means that the second latch 300 is in the locked state of the guide rail. When the protrusion 203 is engaged in the second recess 303, it means that the second latch 300 is in the unlocked state.

[0027] Furthermore, a second slot 306 is provided on the second buckle 300 at the end opposite to the second buckle connector 301 for engaging with the third buckle 400. A limiting groove 304 is also provided on the second buckle 300 for engaging with the limiting block 204 to keep the second buckle 300 sliding on the first buckle 200 and limit the maximum range of sliding of the second buckle 300. For example, when the upper wall of the limiting groove 304 contacts the limiting block 204, the second buckle 300 is in the position closest to the guide rail, thereby locking the guide rail. When the lower wall of the limiting groove 304 contacts the limiting block 204, the second buckle 300 is in the position furthest from the guide rail, thereby engaging and locking.

[0028] In one embodiment, the third latch 400 includes a rotating sleeve 401 with a through hole 404. Two inserts 402 are fixed on the rotating sleeve 401, and the two inserts 402 can be inserted into the first slot 202 and the second slot 306 respectively. A toggle block 403 is also fixed on the rotating sleeve 401 and exposed outside the housing 100. It is used to toggle the third latch 400 to rotate it. By toggle the third latch 400, the two inserts 402 respectively drive the first latch 200 and the second latch 300 to slide in opposite directions.

[0029] In one embodiment, the second buckle 300 is further provided with a first elastic element 305, and a first baffle 121 is fixed in the first slide groove 120. The first elastic element 305 can abut against the first baffle 121. Through the cooperation between the first elastic element 305 and the first baffle 121, the second buckle 300 can have a tendency to move towards the guide rail. The first baffle 121 is L-shaped. The long arm portion of the L-shaped first baffle 121 is used to constrain the movement of the second buckle 300, so that the second buckle 300 can only slide along the length direction of the long arm portion of the L-shaped first baffle 121, that is, slide towards or away from the guide rail.

[0030] In one embodiment, a fixed shaft 122 is also fixed in the first slide groove 120. The fixed shaft 122 consists of two parts. One part is cylindrical and is used to insert into the through hole 404 so that the third buckle 400 can swing around the fixed shaft 122. The other part of the fixed shaft 122 is provided with a guide surface 123 on the side near the side wall of the first slide groove 120. The guide surface 123 can work with the side of the first slide groove 120 to constrain the sliding of the second buckle 300.

[0031] In one embodiment, a second baffle 131 is also fixed inside the second slide groove 130, and a second elastic member 205 is fixed at the bottom end of the first buckle 200. The bottom end of the second elastic member 205 abuts against the second baffle 131. The cooperation between the second baffle 131 and the second elastic member 205 is used to give the first snap-fit ​​connector 201 a tendency to move towards the guide rail, so that the first snap-fit ​​connector 201 remains locked to the guide rail.

[0032] In one embodiment, the sides of the first locking connector 201 and the second locking connector 301 near the guide rail are both inclined surfaces, which facilitates the insertion of the guide rail. For example, when the guide rail needs to be inserted into the guide rail mounting groove 110, it is only necessary to press the guide rail, and the guide rail contacts the inclined surfaces of the second locking connector 301 and the first locking connector 201, thereby pressing the first locking connector 201 and the second locking connector 301 to move away from the guide rail. When the guide rail is installed in the guide rail mounting groove 110, the lever 403 is moved to disengage the protrusion 203 from the second recess 303. At this time, the first locking connector 201 and the second locking connector 301 are automatically bounced up under the elastic force of the second elastic member 205 and the first elastic member 305, respectively, and are inserted into the locking grooves on both sides of the guide rail. At the same time, the protrusion 203 is engaged in the first recess 302.

[0033] like Figures 9 to 10 The diagram illustrates the transition from locked to unlocked state. In the locked state: the first elastic element 305 abuts against the first baffle 121. Due to the elastic force of the first elastic element 305, the second latch 300 is in its lowest position and inserted into the locking groove on the upper side of the guide rail. The second elastic element 205 abuts against the second baffle 131. Due to the elastic force of the second elastic element 205, the first snap-fit ​​connector 201 is in its highest position and inserted into the locking groove on the lower side of the guide rail, locking the guide rail in the guide rail mounting groove 110. At this time, the protrusion 203 is engaged in the first recess 302, and the limiting block 204 abuts against the upper wall of the limiting slide groove 304. Figure 9 and attached Figure 10 For any markings not present in the image, please refer to other attached images.

[0034] Figures 10 to 9 The diagram illustrates the transition from the unlocked to the locked state. In the unlocked state, the user presses and moves the lever 403, causing the rotating sleeve 401 to rotate around the fixed shaft 122. This, in turn, causes the two insert blocks 402 to rotate around the fixed shaft 122. Since the two insert blocks 402 are respectively inserted into the second slot 306 and the first slot 202, when the rotating sleeve 401 rotates, the two insert blocks 402 respectively drive the first latch 200 and the second latch 300 to slide in opposite directions. In other words, in the attached... Figure 10In the process, the first latch 200 moves downward and the second latch 300 moves upward, thereby causing the first latch 201 and the second latch 301 to disengage from the locking grooves on both sides of the guide rail, thus unlocking. At this time, the second elastic element 205 and the first elastic element 305 are in a compressed state. If relocking is required, the user only needs to move the lever 403 to disengage the protrusion 203 from the second recess 303. Under the elastic force of the second elastic element 205 and the first elastic element 305, the first latch 201 and the second latch 301 will be reinserted into the locking grooves on both sides of the guide rail, thus achieving automatic locking.

[0035] The method of using the connection and fixing mechanism between the PLC equipment housing and the mounting rail is as follows: This connection and fixing mechanism is intuitive and convenient to use, mainly including two core operation scenarios: initial installation and disassembly, perfectly realizing the design goal of "tool-free installation and one-click disassembly".

[0036] I. Installation of guide rails and housing: When you need to install a brand new PLC device housing onto a standard DIN rail, please follow these steps: Status Confirmation and Preparation: First, check the locking status of the mechanism. For example... Figure 9 As shown, in the initial or reset state, the first snap-fit ​​connector 201 and the second snap-fit ​​connector 301 both slightly protrude from the guide rail mounting groove 110 under the elastic force of the second elastic member 205 and the first elastic member 305. The protruding point 203 of the first snap-fit ​​200 is inserted into the first recess 302 of the second snap-fit ​​300. At this time, the mechanism is in a locked and ready-to-install state.

[0037] Alignment and Pressing: Align the guide rail mounting groove 110 of the housing 100 with the upper edge of the target DIN rail. Since the contact surfaces of the first snap-fit ​​connector 201 and the second snap-fit ​​connector 301 are both inclined surfaces, simply apply steady pressure to the housing in the direction perpendicular to the rail.

[0038] Automatic locking and engagement: Under pressure, the guide rail will squeeze the inclined surfaces of the first locking connector 201 and the second locking connector 301, forcing the first latch 200 to slide downward against the elastic force of the second elastic element 205, while the second latch 300 slides upward against the elastic force of the first elastic element 305 and overcomes the friction of the first recess 302 and the protrusion 203, causing the two locking connectors to retract, and the protrusion 203 to engage in the second recess 303, allowing the guide rail to slide smoothly into the guide rail mounting groove 110.

[0039] Installation complete: Once the guide rail is fully in place, the pressure applied to the housing disappears. At this point, move the third latch 400 to disengage the protrusion 203 from the second recess 303. The second elastic element 205 then pushes the first latch 200 upwards to reset, and the first elastic element 305 pushes the second latch 300 downwards to reset. The first and second locking connectors 201 and 301 automatically pop out under the elastic force, precisely hooking into the locking grooves on the lower and upper sides of the guide rail, respectively. Simultaneously, the protrusion 203 of the first latch 200, during its reset sliding, will smoothly engage with the first recess 302 of the second latch 300, producing a slight "click" sound and achieving mechanical self-locking. The device is now securely locked onto the guide rail, and the installation is complete, requiring no tools throughout the process.

[0040] II. Disassembly from the guide rail Disassembly is equally simple when it is necessary to maintain, replace, or adjust the position of the installed PLC equipment.

[0041] Unlocking operation: such as Figure 10 As shown, press down on the lever 403 of the third latch 400 with your finger. The lever 403 causes the rotating sleeve 401 to rotate around the fixed shaft 122.

[0042] Linkage disengagement: The two inserts 402 on the rotating sleeve 401 rotate accordingly. Since the two inserts 402 are respectively inserted into the second slot 306 of the second latch 300 and the first slot 202 of the first latch 200, the rotational motion is converted into the opposite linear sliding of the two latches: the second latch 300 is driven to slide upward, and the first latch 200 is driven to slide downward.

[0043] Unlocking: During this process, the protrusion 203 of the first latch 200 slides out of the first recess 302 of the second latch 300. Simultaneously, the first locking connector 201 and the second locking connector 301, along with the movement of their respective latches, completely disengage from the locking groove of the guide rail. At this point, the first elastic element 305 and the second elastic element 205 are compressed and energy stored, and the protrusion 203 engages in the second recess 303, restricting the movement of the first locking connector 201 and the second locking connector 301.

[0044] Removing the device: The first locking connector 201 and the second locking connector 301 will remain in the retracted state because the protrusion 203 is engaged in the second recess 303. At this time, the user can easily lift and remove the entire PLC device housing vertically upward from the DIN rail, completing the disassembly.

[0045] Reset: After releasing the lever 403, under the restoring force of the first elastic element 305 and the second elastic element 205, the first latch 200 and the second latch 300 will automatically slide back in the opposite direction to reset the mechanism. Figure 9 The lockout state shown indicates that the system is ready for the next installation.

[0046] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0047] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0048] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A connection and fixing mechanism between a PLC equipment housing and a mounting guide rail, characterized in that, include: The housing (100) is provided with a guide rail mounting groove (110) for accommodating the mounting guide rail. The first buckle (200) is slidably installed in the housing (100) along the first direction, and one end of it is provided with a first snap connector (201) for engaging with one side of the guide rail. The second buckle (300) is slidably installed in the housing (100) in a second direction opposite to the first direction, and one end of the buckle is provided with a second snap connector (301) for engaging with the other side of the guide rail. A linkage component is rotatably mounted on the housing (100), and the linkage component is simultaneously connected to the first latch (200) and the second latch (300) in a transmission manner; The linkage component is configured to drive the first buckle (200) to slide along the first direction and simultaneously drive the second buckle (300) to slide along the second direction, so that the first buckle connector (201) and the second buckle connector (301) retract or extend synchronously from the guide rail mounting groove (110).

2. The connecting and fixing mechanism according to claim 1, characterized in that, The first buckle (200) and the second buckle (300) have mutually cooperating positioning structures on their opposite sides; the positioning structures include a protruding point (203) on the first buckle (200) and a first notch (302) and a second notch (303) spaced apart on the second buckle (300) along the sliding direction.

3. The connecting and fixing mechanism according to claim 2, characterized in that, The first buckle (200) is provided with a limiting block (204), and the second buckle (300) is provided with a limiting groove (304), the limiting block (204) extending into the limiting groove (304).

4. The connecting and fixing mechanism according to claim 1, characterized in that, The linkage component is a third latch (400) including: A rotating sleeve (401) is rotatably mounted on the housing (100); Two inserts (402) are fixedly mounted on the rotating sleeve (401); The lever (403) is fixedly mounted on the rotating sleeve (401) and exposed outside the housing (100). The first latch (200) is provided with a first slot (202) for inserting one of the plugs (402), and the second latch (300) is provided with a second slot (306) for inserting the other plug (402).

5. The connecting and fixing mechanism according to claim 4, characterized in that, It also includes a first elastic element (305) disposed between the housing (100) and the second snap fastener (300) for providing a biasing force to the second snap fastener (301) toward the guide rail mounting groove (110).

6. The connecting and fixing mechanism according to claim 5, characterized in that, The housing (100) is provided with a first sliding groove (120), and the second buckle (300) is slidably disposed in the first sliding groove (120). The first sliding groove (120) is provided with a first baffle (121), and the first elastic element (305) abuts between the first baffle (121) and the second buckle (300).

7. The connecting and fixing mechanism according to claim 1, characterized in that, It also includes a second elastic element (205) disposed between the housing (100) and the first snap fastener (200) for providing a biasing force to the first snap fastener (201) toward the guide rail mounting groove (110).

8. The connecting and fixing mechanism according to claim 7, characterized in that, The housing (100) is provided with a second slide groove (130), the first buckle (200) is partially slidably disposed in the second slide groove (130), the second slide groove (130) is provided with a second baffle (131), and the second elastic member (205) abuts between the second baffle (131) and the first buckle (200).

9. The connecting and fixing mechanism according to claim 1, characterized in that, Both the first snap-fit ​​connector (201) and the second snap-fit ​​connector (301) have guide slopes on the side facing the guide rail mounting groove (110).

10. The connecting and fixing mechanism according to claim 4, characterized in that, A fixed shaft (122) is fixed inside the first groove (120), and the rotating sleeve (401) is rotatably sleeved on the fixed shaft (122).

Images