A protection structure for weak current line access cabinet

Abstract

The utility model discloses a kind of protection structures for weak current line in-out cabinet, it is related to weak current cabinet technical field, the protection structure includes terminal block;Fixed assembly is set on terminal block, for the fixed butt joint piece of sleeve setting on wire.The protection structure for weak current line in-out cabinet described in the utility model, since two "L" shaped clamping buckles are used as the clamping tool of butt joint piece, when clamping buckle enters into terminal block, clamping buckle moves to the center of terminal block under the action of inner wall of terminal block, that is, extruding to butt joint piece, to ensure the stability of clamping force, secondly, cooperate with the locking assembly on terminal block, the position of clamping buckle is limited, so, effectively solve the technical problem that the weak current cabinet in use is insufficient in the protection ability of the wire into its inside, and then realize the fixation of the wire into, to meet the still stable work of electrical components in cabinet when wire is touched or pulled.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage cabinet technology, and in particular to a protective structure for low-voltage lines entering and exiting the cabinet. Background Technology

[0002] Electricity applications can be divided into two categories according to the strength of power transmission: high voltage and low voltage. Electricity used in buildings and building complexes generally refers to low voltage AC 220V 50Hz and below, which mainly provides people with electrical energy and converts electrical energy into other energy sources, such as air conditioning, lighting, and power. In low voltage systems, the protective structure of the lines entering and exiting the cabinet is a key link to ensure stable signal transmission and safe operation of equipment.

[0003] Currently, a Chinese patent application with patent number "CN202223521303.7" discloses a low-voltage electrical control cabinet that is easy to maintain. The cabinet includes a cabinet body with a protective frame fitted around its outer side. The cabinet body and the protective frame are detachably connected. A cabinet door is hinged to the front of the cabinet body. The cabinet body has a cable-laying cavity and a storage cavity on both sides. A cable-passing hole is provided on the contact surface between the cable-laying cavity and the storage cavity. Several cable winding plates are hung inside the cable-laying cavity, and the wires are wound onto the cable winding plates. Connecting plates are located on the top and bottom sides of the storage cavity, and the connecting plates are equipped with… It has a threaded groove with a fastening knob connected to the threaded groove. Several storage boxes can be detachably installed at the bottom of the storage cavity. Although it can play a certain role in organizing and fixing the wires, it ignores a crucial problem. That is, in the design of the low-voltage cabinet, in order to facilitate the entry and exit of the wires, multiple wire holes are opened on the outer wall of the cabinet. These holes not only provide conditions for air to enter and exit the cabinet, but also, because the wires cannot be fully adapted to these holes, the wires will pull on the equipment inside the cabinet when they are accidentally touched.

[0004] However, during the implementation of the above technical solution, at least the following technical problems were discovered:

[0005] Insufficient protection and poor environmental adaptability; existing low-voltage cabinets, in their initial design, have multiple holes on the outer wall for wiring to facilitate entry and exit. However, when these holes are not in use or are not compatible with the wiring, they allow air to enter and exit the cabinet. Because it's impossible to guarantee a perfect fit between the wiring and these holes, low-voltage lines are easily subjected to external pulling, accidental contact, squeezing, or friction during installation. This not only easily leads to damage to the cable sheath or breakage of the internal core wires, but also the pulling force can penetrate... The force transmitted through the wires to the electrical components inside the cabinet can cause them to detach, deform, or be damaged. Secondly, the initial purpose of the low-voltage cabinet design is to provide a relatively independent storage space for electrical components, thereby isolating them from the outside world. However, due to the defect of the wires entering and exiting the cabinet, air containing dust, moisture, and other impurities can enter the cabinet through the gaps in the wire inlet, causing the equipment components to age or short-circuit, thus failing to meet the original requirements of the cabinet and seriously violating the original design intention of the cabinet. Therefore, we propose a protective structure for low-voltage lines entering and exiting the cabinet. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this utility model provides a protective structure for low-voltage circuits entering and exiting cabinets, solving the technical problems of insufficient protection for wires entering and exiting existing low-voltage cabinets and poor environmental adaptability.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A protective structure for low-voltage wiring entering and exiting a cabinet, the protective structure comprising:

[0011] A power strip installed on the cabinet;

[0012] A fixing component, mounted on the terminal block, is used to secure the mating parts sleeved on the wires;

[0013] The fixing component includes a terminal tube that is plugged into the terminal block, and one end of the terminal tube is provided with two opposing snap fasteners. The snap fasteners are "L" shaped and the end inserted into the terminal tube is slidably connected to the inner wall of the terminal tube.

[0014] When the connector sleeved on the wire is inserted into the terminal block, the front ends of the two snap fasteners are located on both sides of the connector, and the snap fasteners clamp the connector under the restriction of the internal space of the terminal block.

[0015] Preferably, the snap-fit ​​buckle has a notch at one end extending from the connector tube, and a rubber strip is installed on the inner wall of the notch. When the snap-fit ​​buckle grips the connector, the notch of the snap-fit ​​buckle corresponds to the connector, and the rubber strip is located in the gap between the snap-fit ​​buckle and the outer wall of the connector.

[0016] Preferably, the end of the snap-fit ​​that extends into the wiring tube is provided with a connecting rod, and the two ends of the connecting rod are respectively inserted into the sliding grooves on the inner walls of the upper and lower ends of the wiring tube, and can slide along the sliding grooves;

[0017] The opening of the connector tube is chamfered, and when the connecting rod moves to the end of the slide groove, the snap-fit ​​buckle can rotate toward the chamfer of the connector tube.

[0018] Preferably, a locking component is provided at each of the upper and lower ends of the terminal block for locking the connector inserted into the terminal block. The locking component includes a limiting plate inserted into the terminal block, and the limiting plate is connected to the terminal block through a traction spring. The traction spring is always in a compressed state, with the elastic force facing the terminal block.

[0019] When the docking component is inserted into the wiring tube and is located behind the limiting plate, the limiting plate blocks the rear end of the docking component under the action of the traction spring on it.

[0020] Preferably, the front end of the terminal block has a reserved slot that extends vertically, and the lever on the limiting plate extends through the reserved slot to the front end of the terminal block, so that the limiting plate can be moved up and down by the lever.

[0021] Preferably, the docking component includes two front baffles and a rear baffle that are corresponding to each other, and the front baffles and the rear baffles are connected by a hollow cylinder. Each side of the cylinder is provided with a retaining strip, and the outer surface of the retaining strip is provided with a groove. When the retaining buckle is connected to the docking component, the notch of the retaining buckle is inserted into the groove on the outer surface of the retaining strip.

[0022] Preferably, the cylinder includes an inner cylinder connected to the opposite side of the front baffle and the rear baffle. The inner cylinder is made of a flexible material, and an air cavity isolated from the outside is opened inside the inner cylinder. A docking spring is connected inside the air cavity.

[0023] The inner cylinder is equipped with a compression frame located on the moving path of the rear baffle. It is used to limit the movement of the rear baffle. When the front baffle is compressed, the inner cylinder is compressed towards the center to compress and seal the wire passing through its center.

[0024] Preferably, the length of the front baffle is greater than the length of the rear baffle, and a sealing strip is provided on the outer wall of the front baffle. When the front baffle is inserted into the wiring tube, the sealing strip on the outer wall of the front baffle fits against the inner wall of the wiring tube to seal the gap between the front baffle and the wiring tube.

[0025] (III) Beneficial Effects

[0026] 1. By employing two "L"-shaped snap-fit ​​fasteners as clamping tools for the connector, when the snap-fit ​​fasteners enter the junction box, they adhere to the inner wall of the junction box, preventing them from unfolding outwards. Therefore, they can only move towards the center of the junction box, i.e., squeeze towards the connector, thus ensuring stable clamping force. Secondly, in conjunction with the locking component on the junction box, the position of the snap-fit ​​fasteners is restricted, thereby ensuring the stability of wire locking. This prevents the force from being transmitted to the electrical components inside the solid when the wire is accidentally touched or pulled, ensuring their safety. Therefore, it effectively solves the technical problems of insufficient protection for wires entering and exiting the existing low-voltage cabinet and poor environmental adaptability. It achieves the fixation of entering and exiting wires, ensuring stable operation even when the wires are accidentally touched or pulled, thereby ensuring the safety of the electrical components inside the cabinet.

[0027] 2. By using two sliding limit plates as the locking structure of the snap-fit, the wire hole reserved for the uninserted wire can be blocked when no wire is inserted, thereby preventing air from entering the cabinet through the wire hole. This ensures the relative independence of the cabinet's internal space. Secondly, a sealing structure made of flexible material is set on the inner side of the snap-fit ​​and the edge of the connector, which can seal the connector when it is inserted into the connector, thereby ensuring that air cannot enter the cabinet through gaps.

[0028] 3. Utilizing the property of a balloon to expand outward when squeezed, an inner cylinder with an independent air chamber is connected between the front and rear baffles. The inner cylinder is made of flexible material, and a compression frame is set inside the connecting tube. This compression frame is located on the storage path of the connecting part. Therefore, when the connecting part is inserted into the connecting tube, the rear baffle will stop moving under the action of the compression frame, while the front baffle continues to move into the connecting tube. The inner cylinder between the two will be compressed. The outer side of the inner cylinder is restricted by the sleeve and cannot move outward. Therefore, the inner cylinder can only expand towards its center. This can compress and fix the wire inserted inside. It can not only clamp wires of different diameters, but also seal the gap between them and the wire, thereby further ensuring the sealing and fixation of the wire. Attached Figure Description

[0029] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0030] Figure 1 This is a schematic diagram of the wiring board installed inside and outside the cabinet in an embodiment of this utility model;

[0031] Figure 2 This is a structural diagram of the wiring board in an embodiment of this utility model;

[0032] Figure 3 This is a schematic diagram of the protective structure in an embodiment of the present utility model;

[0033] Figure 4 This is an exploded view of the protective structure in an embodiment of this utility model;

[0034] Figure 5 This is an exploded view of the docking parts in an embodiment of this utility model;

[0035] Figure 6 This is a schematic diagram of the front and back structures of the docking component in an embodiment of this utility model;

[0036] Figure 7 This is one of the schematic diagrams showing the use of the protective structure in the embodiments of this utility model;

[0037] Figure 8 This is the second schematic diagram of the protective structure in use in the embodiments of this utility model;

[0038] Figure 9 This is the third schematic diagram of the protective structure in this utility model embodiment;

[0039] Figure 10 This is the fourth schematic diagram of the protective structure in the embodiments of this utility model;

[0040] Figure 11 This is the fifth schematic diagram of the protective structure in this embodiment of the present invention;

[0041] Figure 12 This is one of the cross-sectional schematic diagrams of the protective structure in the embodiments of this utility model;

[0042] Figure 13 This is the second cross-sectional schematic diagram of the protective structure in the embodiments of this utility model;

[0043] Figure 14 This is the third cross-sectional schematic diagram of the protective structure in the embodiments of this utility model;

[0044] Figure 15This is the fourth cross-sectional schematic diagram of the protective structure in the embodiments of this utility model.

[0045] Legend:

[0046] 1. Cabinet;

[0047] 2. Terminal block;

[0048] 3. Fixing components; 31. Junction tube; 32. Snap-fit ​​buckle; 33. Rubber strip; 34. Connecting rod; 35. Slide groove;

[0049] 4. Locking assembly; 41. Limiting plate; 42. Traction spring; 43. Guide groove; 44. Extrusion frame;

[0050] 5. Connecting parts; 51. Front baffle; 52. Rear baffle; 53. Sleeve 1; 54. Sleeve 2; 55. Inner cylinder; 56. Connecting spring; 57. Edge retaining strip;

[0051] 6. Sealing strip. Detailed Implementation

[0052] This application provides a protective structure for low-voltage wiring entering and exiting a cabinet, effectively solving the technical problems of insufficient protection for wires entering and exiting the cabinet and poor environmental adaptability in existing low-voltage cabinets. In existing low-voltage cabinets, two "L"-shaped snap-fits are used as clamping tools for the connecting parts. When the snap-fits enter the junction box, they adhere to the inner wall of the junction box, preventing them from unfolding outwards. Therefore, they can only move towards the center of the junction box, i.e., pressing against the connecting parts, thus ensuring stable clamping force. Furthermore, the locking component on the junction box restricts the position of the snap-fits, thereby ensuring the stability of wire locking. This prevents the force from being transmitted to the electrical components inside the cabinet when the wire is accidentally touched or pulled, ensuring their safety. This achieves the fixation of the entering and exiting wires, ensuring stable operation even when the wires are accidentally touched or pulled, thus ensuring the safety of the electrical components inside the cabinet.

[0053] Example: The technical solution in this application example effectively solves the technical problems of insufficient protection for wires entering and exiting the existing low-voltage cabinets and poor environmental adaptability. The overall idea is as follows:

[0054] To address the problems existing in the prior art, this utility model provides a protective structure for low-voltage wiring entering and exiting a cabinet. This protective structure mainly consists of three parts: a connecting structure sleeved on the outside of the conductor, a fixing structure that can grip the connecting structure, and a sealing structure that can seal the conductor entering and exiting the cabinet. The connecting structure and the fixing mechanism cooperate to grip and fix the conductor. The connecting structure mainly consists of two symmetrical snap-fit ​​buckles 32, and the snap-fit ​​buckles 32 are designed in an "L" shape. Figure 3 and Figure 4 As shown, the bent part of the snap fastener 32 is located at the end that extends out of the connector tube 31, while the end that is inserted into the connector tube 31 can slide along the inner wall of the connector tube 31. Therefore, as the snap fastener 32 moves into the connector tube 31, the openings of the two snap fasteners 32 continuously tighten, as... Figures 12 to 13 As shown, the reason for this situation is that when the end of the latch 32 extending out of the connector tube 31 is tightened, it is gradually pulled towards the center by the squeezing action of the inner wall of the connector tube 31. At this time, the free end of the latch 32 will continuously squeeze towards the position of the wire, thereby grabbing the wire and thus completing the locking of the wire.

[0055] Another important improvement lies in the coordination between the docking structure and the sealing structure. Utilizing the insertion action when the wire is inserted into the terminal cylinder 31, a rectangular compression frame 44 is set on the inner wall of the terminal cylinder 31, and an inner cylinder 55, resembling an "airbag," serves as the main component of the sealing structure. When the docking structure is inserted into the terminal cylinder 31, the "airbag" is compressed and expands outward, thereby compressing and limiting the wire inserted inside, thus encasing the wire and achieving a combination of fixation and gripping. These two elements work together to effectively grip and lock the wire. Simultaneously, this compression also secures wires of different outer diameters. The specific structural details are as follows:

[0056] The fixing structure (fixing component 3) uses two snap-fit ​​buckles 32 as the wire clamping mechanism. To achieve clamping, the two snap-fit ​​buckles 32 need to be brought close together to compress and clamp the wire, thus achieving the clamping effect. We use a compression limiting method, designing the snap-fit ​​buckles 32 in an "L" shape. One end of the snap-fit ​​buckle 32 is inserted into the connector tube 31 and can slide within it, while the other end extends out of the connector tube 31, with the bent portion of the snap-fit ​​buckle 32 also extending out of the connector tube 31. Figure 7 As shown, the wire with the mating piece 5 is inserted into it. During the insertion process, the snap fastener 32 is pressed into the connector tube 31 by the mating piece 5. The snap fastener 32, which was originally spread outward, gradually converges towards the center, thereby squeezing the wire located between the two. Figures 8 to 9As shown, simply inserting the wire with the mating part 5 into the junction box 31 is sufficient to lock the wire. The overall structure is simple and easy to operate. To prevent the space opened by the latch 32 from being insufficient to accommodate the insertion of the mating part 5, a chamfer (i.e., a bevel) is provided at the opening of the junction box 31, such as... Figure 12 As shown, this provides sufficient space for the snap fastener 32 to flip outward when it extends from the connector sleeve 31, facilitating the insertion of the wire with the mating part 5 between them. Figure 8 As shown, secondly, when the docking member 5 drives the snap fastener 32 to be inserted into the wiring tube 31, the snap fastener 32 can tighten along the inclined surface into the wiring tube 31, providing guidance for the movement of the snap fastener 32.

[0057] To ensure stable movement of the snap-fit ​​32 extending into the wiring tube 31, a connecting rod 34 is connected to this end. The two ends of the connecting rod 34 are respectively inserted into the sliding grooves 35 on the inner walls of the upper and lower ends of the wiring tube 31, and can slide along the sliding grooves 35. Figure 3 , Figure 4 as well as Figure 12 As shown, the groove 35 extends along the length of the connector 31. When the snap-fit ​​32 is inserted into the connector 31, the end with the connecting rod 34 moves along the groove 35. Furthermore, the insertion action between the groove 35 and the connecting rod 34 restricts the range of motion of the snap-fit ​​32, allowing it to rotate about the connecting rod 34 as the axial center. Figures 12 to 13 As shown, the other end moves continuously toward the center of the connector 31 under the constraint inside the connector 31, thereby ensuring the stability of the movement of the connector 31.

[0058] The snap fastener 32 has a notch at one end extending from the connector tube 31. This is to allow the snap fastener 32 to engage the connector tube 31, and the notch can provide a certain amount of storage space for the connector 5 so that it can fit in accordance with the shape of the outer wall of the connector 5. A rubber strip 33 is installed on the inner wall of the notch. This way, when the snap fastener 32 grabs the connector 5, the notch of the snap fastener 32 corresponds to the connector 5, and the rubber strip 33 is located in the gap between the snap fastener 32 and the outer wall of the connector 5. This increases the friction between the snap fastener 32 and the connector 5, and also seals the gap between them.

[0059] During use, it was found that if the wire is accidentally touched or pulled, the wire will cause the connector 5, which was originally inserted into the connector 31, to move outward. This is contrary to the retraction of the latch 32. As the latch 32 is continuously pulled outward, it gains room to move, and the wire at the center of the latch 32, under the reaction force of its own deformation, pushes the latch 32 outward, thus opening it and reforming it as before. Figure 7 and Figure 12In the state shown, the original locking function is eliminated, and the wire can be pulled freely, failing to meet the original fixing requirement. To solve this problem, a "lock" needs to be added to the original locking buckle 32 to lock the wire in its original fixed state. Details are as follows:

[0060] like Figure 3 and Figure 4 As shown, a locking structure (i.e., locking component 4) is provided at both the upper and lower ends of the connector 31. These components lock the mating part 5 inserted into the connector 31, thus fulfilling the function of a "lock". The locking component 4 mainly consists of a limiting plate 41 inserted into the connector 31 and a traction spring 42 at the top of the limiting plate 41. The limiting plate 41 corresponds to the guide groove 43 on the connector 31 and can move along the extension direction of the guide groove 43. The limiting plate 41 is connected to the connector 2 via the traction spring 42, and the traction spring 42 is always in a compressed state. This allows the limiting plate 41 to be inserted into the connector 31 under the elastic force of the traction spring 42. Figures 10 to 11 As shown, this design allows the docking piece 5 to be restricted behind the limiting plate 41 when it is inserted into the wiring tube 31, blocking its movement path and thus limiting its movement. This achieves the position locking of the docking piece 5. Furthermore, since the connecting rod 34 on the latch 32 corresponds to the slide groove 35, the length of the slide groove 35 can be set to limit the movement of the latch 32 when the docking piece 5 is inserted into the wiring tube 31. Combined with the limiting plate 41, this blocks both the front and rear sides of the docking piece 5, preventing the docking piece from being locked in place. When component 5 moves, the tension in the conductor is transmitted along the conductor to the connected docking component 5 when the conductor is pulled or accidentally touched. Since the docking component 5 is clamped and its movement path is blocked by the limiting plate 41, the locking buckle 32 will not move outward, thus ensuring the tightness and stability of the connection between the locking buckle 32 and the docking component 5. Conversely, to unlock this locked state, an outwardly extending lever is provided on the limiting plate 41, extending through the pre-reserved slot at the front end of the terminal block 2 and reaching the front end of the terminal block 2. Figure 2 As shown, since the lever is connected to the limiting plate 41, and the reserved slot for the lever extends vertically, the limiting plate 41 can be slid up and down by the lever. When unlocking is required, the lever can be pushed away from the terminal block 31 to move the limiting plate 41 away from the front end of the docking piece 5. Figures 11 to 10 As shown.

[0061] The docking structure (dating component 5) mainly consists of two front baffles 51 and a rear baffle 52, one in front of the other. In order to correspond with the notch on the snap fastener 32, a retaining strip 57 is provided on each side of the sleeve corresponding to the snap fastener 32. The outer surface of the retaining strip 57 has a groove. When the snap fastener 32 is connected to the docking component 5, the notch of the snap fastener 32 can be inserted into the groove on the outer surface of the retaining strip 57, thereby adapting the docking component 5 and the snap fastener 32 to facilitate the snap fastener 32 to grip the docking component 5.

[0062] Another major improvement in this application is the use of an inner cylinder 55, resembling an "airbag," as the connecting structure between the front baffle 51 and the rear baffle 52. This inner cylinder 55 consists of two layers of flexible cylindrical structures, with the edges of the two cylinders connected to form an enveloping effect. Thus, the air cavity inside the inner cylinder 55 is independent of the external space, thereby forming an airbag. Figure 5 As shown (where the inner cylinder 55 is split into two parts to allow the docking spring 56 to be seen); the two ends of the inner cylinder 55 are connected to the front baffle 51 and the rear baffle 52 respectively. Therefore, the inner cylinder 55 can only be compressed and expanded outward when the front baffle 51 and the rear baffle 52 move relative to each other. For this purpose, a rectangular compression frame 44 is installed inside the wiring sleeve 31, and the center of the compression frame 44 has a through hole for the wire to pass through, as shown. Figure 4 As shown, it is positioned on the moving path of the rear baffle 52 to limit and block the movement of the rear baffle 52. This allows the front baffle 51 to be pushed further when the rear baffle 52 is in contact with the extrusion frame 44, causing the inner cylinder 55 to be squeezed towards the center, thus sealing the wire passing through its center. Figures 8 to 9 and Figures 14 to 15 As shown; secondly, to ensure the constant expansion direction of the inner cylinder 55, the sleeve is designed as two interlocking sleeves, sleeve one 53 and sleeve two 54. Sleeve one 53 is connected to the rear baffle 52, and sleeve two 54 is connected to the front baffle 51, both covering the outside of the inner cylinder 55, thus restricting the outward expansion of the inner cylinder 55. Therefore, when the front baffle 51 and the rear baffle 52 are pressed against each other, the inner cylinder 55 between them is pressed and fixed towards the wire passing through it, as shown. Figures 14 to 15 As shown, the interlocking sleeves can always cover the outside of the inner cylinder 55 when the front baffle 51 and the rear baffle 52 move relative to each other, and can move with the front baffle 51 or the rear baffle 52.

[0063] To enable resetting, a docking spring 56 is installed in the air cavity of the inner cylinder 55, with both ends of the docking spring 56 connected to the inner cylinder 55. Since both ends of the inner cylinder 55 are connected to the front baffle 51 and the rear baffle 52 respectively, the docking spring 56 is indirectly connected to the front baffle 51 and the rear baffle 52. Therefore, when there is no external force between the front baffle 51 and the rear baffle 52, the spring 56 itself can push the front baffle 51 and the rear baffle 52 away from each other, thereby completing the resetting of the front baffle 51 and the rear baffle 52. At this time, the inner cylinder 55 is stretched to both sides, and the air chamber of the inner cylinder 55 will contract. The wire inserted into the inner cylinder 55 will then be released, thus preventing the wire from loosening. To seal the gap between the front baffle 51 and the terminal block 31, the length of the front baffle 51 is greater than the length of the rear baffle 52, and a sealing strip 6 is fitted onto the outer wall of the front baffle 51. This ensures that when the front baffle 51 is inserted into the terminal block 31, the sealing strip 6 on the outer wall of the front baffle 51 fits against the inner wall of the terminal block 31, sealing the gap between the front baffle 51 and the terminal block 31. Figure 10 As shown.

[0064] In the specific implementation process, the first step is to first put the connector 5 onto the wire, so that the back baffle 52 corresponds to the end of the wire inserted into the cabinet 1. After that, align the end of the wire with the terminal block 31 on the terminal block 2 to form a shape as shown in the figure. Figure 7 The state shown;

[0065] The second step involves pushing the end of the wire with the connecting piece 5 into the gap between the two latches 32. Since the gap between the two latches 32 when unfolded is greater than the length of the rear baffle 52 but less than the length of the front baffle 51, the rear baffle 52 can pass through the two latches 32 as the connecting piece 5 moves towards their positions. Simultaneously, when the front baffle 51 moves to the position of the latches 32, the front baffle 51 simultaneously engages with both latches 32, forming a... Figure 8 As shown, the rubber strip 33 on the notch of the snap fastener 32 corresponds to the snap edge strip 57 on the outer side of the mating part 5, as shown. Figure 12 As shown, this is to facilitate subsequent clamping;

[0066] The third step involves continuing to insert the connecting piece 5 into the wiring tube 31. Since the front baffle 51 is in contact with the two snap fasteners 32, and the two snap fasteners 32 extend outwards along the chamfer, the snap fasteners 32 are pushed further into the wiring tube 31 as the connecting piece 5 moves into it. Furthermore, because the end of the snap fastener 32 inserted into the wiring tube 31 can only slide along the groove 35, it restricts the snap fastener 32 from rotating only around the connecting rod 34. As the snap fasteners 32 continue to enter the wiring tube 31, they compress the connecting piece 5 between the two snap fasteners 32 until the snap fastener is completely pulled into the wiring tube 31. Figure 9 As shown, the snap fastener 32 is in contact with the inner wall of the connector 31, while the notch is engaged with the snap strip 57 on the outside of the mating part 5, and is pressed against it, as shown. Figure 13 As shown;

[0067] Fourth step, continue pushing the docking part 5 so that the rear baffle 52 at the rear end of the docking part 5 fits against the extrusion frame 44 inside the wiring tube 31, as shown. Figure 14 As shown, at this point, the rear baffle 52 can no longer move into the wiring tube 31. Utilizing this characteristic, the front baffle 51 is further pushed into the wiring tube 31. This compresses the inner tube 55 located between the front baffle 51 and the rear baffle 52, causing it to expand outwards, thereby sealing the wire inserted inside. This continues until the front baffle 51 is completely moved behind the limiting plate 41. At this point, the limiting plate 41, under the force of the traction spring 42, is inserted into the wiring tube 31. Figures 10 to 11 As shown, this allows the docking part 5 to be restricted behind the limiting plate 41 when it is inserted into the connector tube 31, blocking the movement path of the docking part 5 and thus restricting its movement, thereby completing the position locking of the docking part 5.

[0068] During unlocking, since the lever is connected to the limiting plate 41 and the reserved slot for the lever extends vertically, the limiting plate 41 can be slid up and down by the lever. When unlocking is required, the lever can be pushed away from the terminal block 31 to move the limiting plate 41 away from the front end of the docking piece 5, as shown in the figure. Figures 11 to 10 As shown, pulling the wire at this time will cause the connecting piece 5, which was originally inserted into the junction box 31, to move outwards. This is the opposite of the retraction of the latch 32. As the latch 32 is continuously pulled outwards, it gains room to move. The wire at the center of the latch 32, under the reaction force of its own deformation, will push the latch 32 outwards, thus opening it and reforming it as shown. Figure 7 and Figure 12 In the state shown, the original locking function is eliminated, and the wire can be pulled freely.

[0069] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A protective structure for low-voltage wiring entering and exiting a cabinet, characterized in that, The protective structure includes: A junction box (2) installed on the cabinet (1); The fixing component (3) is set on the terminal block (2) and is used to clamp the connecting piece (5) sleeved on the wire; The fixing component (3) includes a wire tube (31) inserted into the wiring plate (2), and one end of the wire tube (31) is provided with two opposing snap fasteners (32). The snap fasteners (32) are "L" shaped and the end inserted into the wire tube (31) is slidably connected to the inner wall of the wire tube (31). When the connector (5) sleeved on the wire is inserted into the junction box (31), the front ends of the two snap fasteners (32) are located on both sides of the connector (5), and the snap fasteners (32) clamp the connector (5) under the restriction of the internal space of the junction box (31).

2. The protective structure for low-voltage wiring entering and exiting a cabinet as described in claim 1, characterized in that: The snap fastener (32) has a notch at one end extending out of the connector tube (31), and a rubber strip (33) is installed on the inner wall of the notch. When the snap fastener (32) grabs the connector (5), the connector (5) corresponds to the notch of the snap fastener (32), and the rubber strip (33) fits against the outer wall of the connector (5).

3. The protective structure for low-voltage wiring entering and exiting a cabinet as described in claim 2, characterized in that: The snap fastener (32) is provided with a connecting rod (34) at one end that extends into the wiring tube (31), and the two ends of the connecting rod (34) are respectively inserted into the sliding grooves (35) on the upper and lower inner walls of the wiring tube (31), and can slide along the sliding grooves (35); The opening of the junction box (31) is symmetrically chamfered and is opposite to the connecting rod (34). When the connecting rod (34) moves to the end of the slide groove (35), the snap fastener (32) can rotate toward the chamfer of the junction box (31).

4. A protective structure for low-voltage wiring entering and exiting a cabinet as described in any one of claims 1-3, characterized in that: The upper and lower ends of the terminal block (31) are each provided with a locking component (4) for locking the docking piece (5) inserted into the terminal block (31). The locking component (4) includes a limiting plate (41) inserted into the terminal block (31), and the limiting plate (41) is connected to the terminal block (2) through a traction spring (42). The traction spring (42) is always in a compressed state, and the elastic force is directed towards the terminal block (31). When the docking piece (5) is inserted into the wiring tube (31) and is located behind the limiting plate (41), the limiting plate (41) blocks the movement path of the docking piece (5) under the action of the traction spring (42) on it.

5. The protective structure for low-voltage wiring entering and exiting a cabinet as described in claim 4, characterized in that: The front end of the terminal block (2) is provided with a reserved slot, and the reserved slot extends vertically. The lever on the limiting plate (41) extends through the reserved slot to the front end of the terminal block (2), and the limiting plate (41) can be driven to slide vertically by the lever.

6. The protective structure for low-voltage wiring entering and exiting a cabinet as described in claim 1, characterized in that: The docking component (5) includes a front baffle (51) and a rear baffle (52) corresponding to each other. The front baffle (51) and the rear baffle (52) are connected by a hollow cylinder. Each side of the cylinder is provided with a retaining strip (57), and the outer surface of the retaining strip (57) is provided with a groove. When the retaining buckle (32) is connected to the docking component (5), the notch of the retaining buckle (32) is inserted into the groove on the outside of the retaining strip (57).

7. The protective structure for low-voltage wiring entering and exiting a cabinet as described in claim 6, characterized in that: The cylinder includes an inner cylinder (55) connected to the opposite side of the front baffle (51) and the rear baffle (52). The inner cylinder (55) is made of flexible material, and an air cavity isolated from the outside is opened inside the inner cylinder (55). A docking spring (56) is connected inside the air cavity. The inner cylinder (31) is equipped with a compression frame (44) located on the moving path of the rear baffle (52) to limit the rear baffle (52). When the front baffle (51) is pressed, the inner cylinder (55) is squeezed towards the center and the wire passing through its center is squeezed and sealed.

8. The protective structure for low-voltage wiring entering and exiting a cabinet as described in claim 7, characterized in that: The length of the front baffle (51) is greater than the length of the rear baffle (52), and the outer wall of the front baffle (51) is fitted with a sealing strip (6). When the front baffle (51) is inserted into the wiring tube (31), the sealing strip (6) on the outer wall of the front baffle (51) fits against the inner wall of the wiring tube (31) to seal the gap between the front baffle (51) and the wiring tube (31).

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