Quick-locking connection structure of rectangular connector

Abstract

The application relates to the technical field of connectors, in particular to a quick locking connection structure of a rectangular connector, which comprises a plug, the front surface of the plug is fixedly connected with a limiting groove, the back surface of the plug is provided with a socket, the surface of the socket is rotationally connected with a clamping assembly, the upper surface of the plug is provided with a limiting mechanism, the limiting mechanism comprises: a locking part of the limiting mechanism is rotationally connected with the upper surface of the plug; a fixed part, the lower surface of the fixed part is fixedly connected with the upper surface of the socket. After the plug and the socket are inserted into position, the clamping assembly is automatically folded under the reset action of a first spring, the first clamping tooth and the second clamping tooth are tightly engaged, meanwhile, a second spring in the fixed part pushes a limiting plate to be accurately clamped into a fixing hole of a clamping plate, the locking part is hard locked, the rotating freedom of a push rod is bidirectionally limited, and thus the problem that the plug and the socket of the connector are separated due to external force pulling or the loosening of the connector interface is avoided.

Description

Technical Field

[0001] This invention relates to the field of connector technology, and in particular to a quick-locking connection structure for a rectangular connector. Background Technology

[0002] Rectangular connectors are widely used in various electrical connection and equipment wiring fields such as industrial automation, new energy equipment, electrical control cabinets, vehicle electrical systems, communication equipment, and medical devices. They are the basic connection components for realizing circuit signal and power transmission. Conventional rectangular connectors mainly rely on the direct plug-socket connection to achieve circuit conduction. In the traditional structure, the plug has conductive pins or conductive terminals inside, and the socket has corresponding conductive holes or contact springs inside. By rigidly inserting the plug and socket, the conductive terminals and conductive holes are in close contact, thereby completing the current transmission and signal interaction between devices.

[0003] Existing technologies often have the following drawbacks: rectangular connectors rely on simple mating or a single snap-fit ​​to connect and fix the plug and socket. Under conditions such as vibration and cable pulling, this can easily lead to problems such as connector loosening, snap-fit ​​disengagement, and poor contact.

[0004] Therefore, the present invention provides a quick-locking connection structure for a rectangular connector. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of rectangular connectors, which rely solely on simple mating or a single snap-fit ​​to connect and fix the plug and socket. Under conditions such as vibration and cable pulling, this can easily lead to loosening of the connector, snap-fit ​​disengagement, and poor contact. Therefore, this invention proposes a quick-locking connection structure for rectangular connectors.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a quick-locking connection structure for a rectangular connector, comprising a plug, a limiting groove fixedly connected to the front of the plug, a socket provided on the back of the plug, a snap-fit ​​assembly rotatably connected to the surface of the socket, and a limiting mechanism provided on the upper surface of the plug, the limiting mechanism comprising: a locking component rotatably connected to the upper surface of the plug; a fixing component, the lower surface of which is fixedly connected to the upper surface of the socket; and a limiting plate fixedly connected to the top wall of the inner wall of the plug, the limiting plate being used to push the locking component to rotate, cooperating with the fixing component to limit the locking component, and snapping the snap-fit ​​assembly.

[0007] Preferably, the snap-fit ​​assembly includes a clip holder, and a rotating column is fixedly connected to both the inner wall and the bottom wall of the clip holder. The end of the rotating column away from the clip holder is rotatably connected to one side of the socket. When the plug is pushed, the plug faces the socket. When the locking component contacts the front edge of the snap-fit ​​assembly, the locking component rotates and pushes the clip holder to rotate to both sides. At this time, the clip holder drives the rotating column to rotate.

[0008] Preferably, the snap-fit ​​assembly further includes a pressure frame, one side of which is fixedly connected to the surface of the rotating column. A spring cylinder is fixedly connected to the side of the socket, and a first spring is fixedly connected to the inner wall of the spring cylinder. The end of the first spring away from the spring cylinder is fixedly connected to one side of the pressure frame. A limit rod is fixedly connected to the inner wall of the spring cylinder. The end of the limit rod away from the spring cylinder passes through one side of the pressure frame, and the first spring is sleeved on the surface of the limit rod. When the rotating column rotates, it drives the pressure frame to rotate. The rotating pressure frame squeezes the limit rod, and the limit rod is compressed until the locking component is at the bend of the snap-fit ​​assembly. At this time, the first spring resets and pushes the pressure frame to rotate. The rotation of the pressure frame drives the snap-fit ​​frame to snap onto the push rod through the rotating column.

[0009] Preferably, the locking component includes a push rod, the bottom end of which is rotatably connected to the upper surface of the plug and extends through the upper surface of the plug into the interior of the plug. A retaining plate is fixedly connected to the bottom end of the push rod, and a fixing hole is provided on the upper surface of the retaining plate. A first retaining tooth is fixedly connected to one side of the retaining bracket, and a second retaining tooth is fixedly connected to the surface of the push rod. One side of the first retaining tooth engages with the surface of the second retaining tooth. The inner wall edges of the socket and the plug are flush. When the surface edge of the socket is in contact with the inner wall of the plug, the socket is corrected during the process of pushing the socket into the plug, so that the first retaining tooth on the retaining bracket engages with the second retaining tooth on the push rod. When the retaining bracket contacts the push rod, it pushes the push rod to rotate, and the rotation of the push rod drives the retaining plate to rotate.

[0010] Preferably, the limiting plate includes a vertical plate, and a return spring is fixedly connected to one side of the vertical plate and the back of the locking plate. One side of the vertical plate is fixedly connected to the inner wall of the plug. When the locking plate rotates, it pulls the return spring. When the push rod is released from the limiting position, the return spring resets and pulls the locking plate to rotate, thereby driving the push rod to rotate back to its original position. When the plug is pushed into the socket again, the locking component can fit the surface of the second locking tooth, so that when the locking bracket contacts the push rod, it can push the push rod to rotate.

[0011] Preferably, the fixing component includes a cylinder, the lower surface of which is fixedly connected to the upper surface of the socket. A pressure plate is slidably fitted on the inner wall of the cylinder. A second spring is fixedly connected to the lower surface of the pressure plate. The end of the second spring away from the pressure plate is fixedly connected to the upper surface of the socket. A limiting plate is fixedly connected to the lower surface of the pressure plate. One side of the limiting plate is inclined at a certain angle and is adapted to the inner wall of the fixing hole. When the push rod rotates, it squeezes the limiting plate. At this time, the limiting plate pushes the pressure plate to move up and pulls the second spring. When the limiting plate and the fixing hole are in the same position, the second spring resets and pulls the pressure plate to move. The pressure plate moves and then pushes the limiting plate to move into the fixing hole, thereby limiting the push rod. When the card holder is pushed or an external force causes the card holder to open to the outside, the first locking tooth pushes the push rod to rotate through the second locking tooth. At this time, the limiting plate blocks the card plate through the fixing hole, thereby locking the first locking tooth.

[0012] Preferably, a pull rod is rotatably connected to the upper surface of the pressure plate, a limiting plate is fixedly sleeved on the surface of the pull rod, and a positioning block is fixedly connected to the surface of the cylinder. A limiting groove is formed on the upper surface of the positioning block, and one side of the limiting plate is adapted to the inner wall of the limiting groove. When it is necessary to disassemble the plug, pull the pull rod, which then drives the pressure plate to move upward until the pressure plate is above the positioning block. Then, rotate the pull rod to drive the limiting plate to rotate until the limiting plate and the limiting groove are in the same position. At this time, the second spring resets and pulls the pressure plate to drive the pull rod to move downward. The downward movement of the pull rod then drives the limiting plate to move into the limiting groove so that the limiting plate is inside the cylinder. Then, pull the four pull rods in sequence to cancel the limiting of each push rod.

[0013] Preferably, there are two snap-fit ​​components, and the two snap-fit ​​components are symmetrically arranged on both sides of the socket with the vertical center line on the back of the socket as the axis of symmetry. The inner wall of the plug is fixedly connected with a spring piece. The spring piece is arc-shaped, and the two ends of the spring piece are fixed to the inner wall of the plug and are arched in the direction away from the inner wall of the plug. When the plug is inserted into the socket, the socket is squeezed by the spring piece. When the locking component is released from the limit, the spring piece resets and pushes the socket in the opposite direction to push the plug out, thereby facilitating the disassembly of the plug.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are: 1. In this invention, after the plug and socket are inserted into place, the snap-fit ​​assembly automatically retracts under the reset action of the first spring, allowing the first snap-fit ​​tooth and the second snap-fit ​​tooth to mesh tightly. At the same time, the second spring inside the fixing component pushes the limiting plate to accurately snap into the fixing hole of the snap-fit ​​plate, which rigidly locks the locking component and restricts the rotational freedom of the push rod in both directions, thereby avoiding the problem of the plug and socket of the connector being separated due to external force pulling or loosening of the connector interface.

[0015] 2. In this invention, when disassembling the connector, the pull rod is pulled up and rotated, which drives the pressure plate to compress the second spring, causing the limiting plate to disengage from the fixing hole, releasing the locking restriction on the locking component. The limiting groove is used to fix the limiting plate in place, preventing it from springing back in the unlocked state. When all restrictions are released, the arc-shaped spring piece on the inner wall of the plug releases the pre-tightening force and automatically pushes the socket outward, overcoming the frictional force of the insertion and engagement, thereby realizing the automatic pop-out separation of the plug and socket, which is convenient for disassembly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the rear view structure of the plug of the present invention; Figure 3 This is a rear view structural diagram of the locking component of the present invention; Figure 4 This is a side view of the structure of the present invention; Figure 5 This is a side view of the snap-fit ​​assembly of the present invention; Figure 6 This is a side view of the fixing component of the present invention. Figure 7 This is a side sectional view of the cylinder of the present invention; Figure 8 This is a front view of the socket structure of the present invention; Figure 9 This is a bottom view of the plug structure of the present invention.

[0017] Legend: 1. Plug; 2. Limiting groove; 3. Socket; 4. Snap-fit ​​assembly; 41. Frame; 42. Rotating column; 51. Pressure frame; 52. Spring cylinder; 53. First spring; 54. Limiting rod; 6. Locking component; 61. Push rod; 62. Clamping plate; 63. Fixing hole; 7. Fixing component; 71. Cylinder; 72. Pressure plate; 73. Pull rod; 74. Second spring; 75. Limiting plate; 8. Limiting plate; 9. First clamping tooth; 10. Second clamping tooth; 111. Vertical plate; 112. Return spring; 12. Positioning block; 13. Spring piece. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] Reference Figures 2-4As shown in this embodiment: a quick-locking connection structure for a rectangular connector includes a plug 1, a limiting groove 2 fixedly connected to the front of the plug 1, a socket 3 provided on the back of the plug 1, a snap-fit ​​assembly 4 rotatably connected to the surface of the socket 3, and a limiting mechanism provided on the upper surface of the plug 1. The limiting mechanism includes: a locking component 6, which is rotatably connected to the upper surface of the plug 1; a fixing component 7, whose lower surface is fixedly connected to the upper surface of the socket 3; and a limiting plate 8, which is fixedly connected to the top wall of the inner wall of the plug 1. The limiting plate 8 is used to push the locking component 6 to rotate, and cooperates with the fixing component 7 to limit the locking component 6 and snap the snap-fit ​​assembly 4.

[0020] Reference Figures 3-7 As shown, the snap-fit ​​assembly 4 includes a clip holder 41, with rotating columns 42 fixedly connected to both the inner wall and bottom wall of the clip holder 41. The end of the rotating column 42 away from the clip holder 41 is rotatably connected to one side of the socket 3. The snap-fit ​​assembly 4 also includes a pressure frame 51, with one side of the pressure frame 51 fixedly connected to the surface of the rotating column 42. A spring cylinder 52 is fixedly connected to the side of the socket 3. A first spring 53 is fixedly connected to the inner wall of the spring cylinder 52. The end of the first spring 53 away from the spring cylinder 52 is fixedly connected to one side of the pressure frame 51. A limit rod 54 is fixedly connected to the inner wall of the spring cylinder 52, with the end of the limit rod 54 away from the spring cylinder 52 penetrating one side of the pressure frame 51. The first spring 53 is sleeved on the surface of the limiting rod 54, pushing the plug 1 towards the socket 3. When the locking component 6 contacts the front edge of the snap-fit ​​assembly 4, the locking component 6 rotates and pushes the snap-fit ​​bracket 41 to rotate to both sides. At this time, the snap-fit ​​bracket 41 drives the rotating column 42 to rotate. While the rotating column 42 rotates, it also drives the pressure frame 51 to rotate. The pressure frame 51 rotates and squeezes the limiting rod 54. At this time, the limiting rod 54 is compressed until the locking component 6 is at the bend of the snap-fit ​​assembly 4. At this time, the first spring 53 resets and pushes the pressure frame 51 to rotate. The rotation of the pressure frame 51 drives the snap-fit ​​bracket 41 to snap onto the pushing rod 61 through the rotating column 42.

[0021] Reference Figures 3-7 As shown, the locking component 6 includes a push rod 61. The bottom end of the push rod 61 is rotatably connected to the upper surface of the plug 1, and passes through the upper surface of the plug 1 and extends into the interior of the plug 1. A locking plate 62 is fixedly connected to the bottom end of the push rod 61. A fixing hole 63 is provided on the upper surface of the locking plate 62. A first locking tooth 9 is fixedly connected to one side of the locking bracket 41, and a second locking tooth 10 is fixedly connected to the surface of the push rod 61. One side of the first locking tooth 9 engages with the surface of the second locking tooth 10. The socket 3 is flush with the inner wall edge of the plug 1. When the surface edge of the socket 3 is in contact with the inner wall of the plug 1, the socket 3 is corrected during the process of being pushed into the plug 1, so that the first locking tooth 9 on the locking bracket 41 engages with the second locking tooth 10 on the push rod 61. When the locking bracket 41 contacts the push rod 61, it pushes the push rod 61 to rotate. The rotation of the push rod 61 then drives the locking plate 62 to rotate.

[0022] Reference Figures 2-6 As shown, the limiting plate 8 includes a vertical plate 111. A return spring 112 is fixedly connected to one side of the vertical plate 111 and the back of the clamping plate 62. One side of the vertical plate 111 is fixedly connected to the inner wall of the plug 1. When the clamping plate 62 rotates, it pulls the return spring 112. When the push rod 61 is released from the limit, the return spring 112 returns to its original position and pulls the clamping plate 62 to rotate, thereby driving the push rod 61 to rotate back to its original position. When the plug 1 is pushed into the socket 3 again, the locking component 6 can fit the surface of the second locking tooth 10, so that when the clamping bracket 41 contacts the push rod 61, it can push the push rod 61 to rotate.

[0023] Reference Figures 4-8 As shown, the fixing component 7 includes a cylinder 71, the lower surface of which is fixedly connected to the upper surface of the socket 3. A pressure plate 72 is slidably fitted onto the inner wall of the cylinder 71. A second spring 74 is fixedly connected to the lower surface of the pressure plate 72. The end of the second spring 74 away from the pressure plate 72 is fixedly connected to the upper surface of the socket 3. A limiting plate 75 is fixedly connected to the lower surface of the pressure plate 72. One side of the limiting plate 75 is inclined at a certain angle, and the limiting plate 75 is adapted to the inner wall of the fixing hole 63. When the pushing rod 61 rotates, it presses the limiting plate 75. The limiting plate 75 pushes the pressure plate 72 upward, pulling the second spring 74. When the limiting plate 75 and the fixing hole 63 are in the same position, the second spring 74 resets and pulls the pressure plate 72 to move. The pressure plate 72 moves and pushes the limiting plate 75 into the fixing hole 63, thereby limiting the push rod 61. When the card holder 41 is pushed or an external force causes the card holder 41 to open to the outside, the first locking tooth 9 pushes the push rod 61 to rotate through the second locking tooth 10. At this time, the limiting plate 75 blocks the card plate 62 through the fixing hole 63, thereby locking the first locking tooth 9.

[0024] Reference Figures 2-5 As shown, a pull rod 73 is rotatably connected to the upper surface of the pressure plate 72. A limiting plate 8 is fixedly sleeved on the surface of the pull rod 73. A positioning block 12 is fixedly connected to the surface of the cylinder 71. A limiting groove 2 is opened on the upper surface of the positioning block 12. One side of the limiting plate 8 is adapted to the inner wall of the limiting groove 2. When it is necessary to disassemble the plug 1, pull the pull rod 73, and the pull rod 73 will drive the pressure plate 72 to move upward until the pressure plate 72 is above the positioning block 12. Then, rotate the pull rod 73 to drive the limiting plate 8 to rotate until the limiting plate 8 and the limiting groove 2 are in the same position. At this time, the second spring 74 resets and pulls the pressure plate 72 to drive the pull rod 73 to move downward. The pull rod 73 moves downward and then drives the limiting plate 8 to move into the limiting groove 2 so that the limiting plate 75 is in the cylinder 71. Then, pull the four pull rods 73 in sequence to cancel the limiting of each push rod 61.

[0025] Reference Figures 2-4As shown, there are two snap-fit ​​components 4, and the two snap-fit ​​components 4 are symmetrically arranged on both sides of the socket 3 with the vertical center line on the back of the socket 3 as the axis of symmetry. A spring piece 13 is fixedly connected to the inner wall of the plug 1. The spring piece 13 is arc-shaped and fixed to the inner wall of the plug 1 at both ends of the arc shape. It is arched in the direction away from the inner wall of the plug 1. When the plug 1 is inserted into the socket 3, the socket 3 is squeezed by the spring piece 13. When the locking component 6 is released from the limit, the spring piece 13 resets and pushes the socket 3 in the opposite direction to push the plug 1 out, so as to facilitate the disassembly of the plug 1.

[0026] Working principle: When plugging in, push the plug 1 toward the socket 3 to complete the alignment and correction. During the plugging process, the snap-fit ​​components 4 on both sides of the socket 3 contact the edge of the locking component 6, squeezing and pushing the locking component 6 to rotate. At this time, the clip 41 is subjected to force and rotates to both sides, and simultaneously drives the pressure frame 51 to rotate. The pressure frame 51 slides along the limit rod 54 and compresses the first spring 53 to complete the elastic energy storage. When plug 1 is inserted into place, locking component 6 rotates to the bent position of snap-fit ​​assembly 4, the compressed first spring 53 returns to its original position, pushing pressure frame 51 to rotate, which in turn drives snap-fit ​​41 via rotating column 42. The first tooth 9 on the card holder 41 engages with the second tooth 10 on the surface of the push rod 61. When the push rod 61 rotates, it synchronously drives the card plate 62 to rotate. The card plate 62 presses the limiting plate 75, thereby causing the pressure plate 72 to slide upward along the inner wall of the cylinder 71 and stretch the second spring 74. When the fixing hole 63 on the card plate 62 is precisely aligned with the position of the limiting plate 75, the second spring 74 resets, pushing the pressure plate 72 downward, so that the limiting plate 75 is inserted into the fixing hole 63, forming a rigid limit lock on the card plate 62 and the push rod 61, restricting the rotation of the locking part 6. At the same time, during the rotation of the card plate 62, the reset spring 112 is stretched to store energy. In the locked state, the reset spring 112 maintains the preload to prevent the structure from loosening, and at the same time pushes the unlocked locking part 6 back to its original position.

[0027] When disassembly and separation are required, pull rod 73 upwards. Rod 73 moves pressure plate 72 upwards, causing limit plate 75 to disengage from fixing hole 63, releasing the limit on clamping plate 62. Then rotate rod 73 so that limit plate 8 on rod 73 aligns with limit groove 2 on the front of plug 1. After releasing rod 73, second spring 74 returns to its original position, causing pressure plate 72 to move downwards, locking limit plate 8 into limit groove 2, releasing the limit of a single locking component 6. After operating all rods 73 in sequence, all locking limits are completely released.

[0028] After the locking limit is released, the reset spring 112 retracts and resets, pulling the card plate 62 and the push rod 61 back to the initial position. At the same time, the arc-shaped spring piece 13 fixed on the inner wall of the plug 1 releases elastic potential energy, pushing the socket 3 in the opposite direction, causing the socket 3 to automatically separate from the plug 1, completing the quick disassembly.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A quick-locking connection structure for a rectangular connector, comprising a plug (1), characterized in that: The front of the plug (1) is fixedly connected to a limiting groove (2), and the back of the plug (1) is provided with a socket (3). A snap-fit ​​assembly (4) is rotatably connected to the surface of the socket (3). The upper surface of the plug (1) is provided with a limiting mechanism, which includes: The locking component (6) is rotatably connected to the upper surface of the plug (1); The fixing component (7) is fixedly connected to the upper surface of the socket (3) via its lower surface. The limiting plate (8) is fixedly connected to the top wall of the inner wall of the plug (1). The limiting plate (8) is used to push the locking component (6) to rotate, and cooperate with the fixing component (7) to limit the locking component (6) and clamp the snap-fit ​​component (4).

2. The quick-locking connection structure of a rectangular connector according to claim 1, characterized in that: The snap-fit ​​assembly (4) includes a card holder (41), and a rotating column (42) is fixedly connected to the inner wall and bottom wall of the card holder (41). The end of the rotating column (42) away from the card holder (41) is rotatably connected to one side of the socket (3).

3. The quick-lock connection structure of a rectangular connector according to claim 2, characterized in that: The snap-fit ​​assembly (4) also includes a pressure frame (51), one side of which is fixedly connected to the surface of the rotating column (42). A spring cylinder (52) is fixedly connected to the side of the socket (3). A first spring (53) is fixedly connected to the inner wall of the spring cylinder (52). The end of the first spring (53) away from the spring cylinder (52) is fixedly connected to one side of the pressure frame (51). A limit rod (54) is fixedly connected to the inner wall of the spring cylinder (52). The end of the limit rod (54) away from the spring cylinder (52) passes through one side of the pressure frame (51), and the first spring (53) is sleeved on the surface of the limit rod (54).

4. The quick-lock connection structure of a rectangular connector according to claim 1, characterized in that: The locking component (6) includes a push rod (61), the bottom end of which is rotatably connected to the upper surface of the plug (1) and extends through the upper surface of the plug (1) and into the interior of the plug (1). A retaining plate (62) is fixedly connected to the bottom end of the push rod (61), and a retaining hole (63) is provided on the upper surface of the retaining plate (62).

5. The quick-lock connection structure of a rectangular connector according to claim 4, characterized in that: A first tooth (9) is fixedly connected to one side of the card holder (41), and a second tooth (10) is fixedly connected to the surface of the push rod (61). One side of the first tooth (9) meshes with the surface of the second tooth (10).

6. The quick-lock connection structure of a rectangular connector according to claim 4, characterized in that: The limiting plate (8) includes a vertical plate (111), and a return spring (112) is fixedly connected to one side of the vertical plate (111) and the back of the card plate (62). One side of the vertical plate (111) is fixedly connected to the inner wall of the plug (1).

7. The quick-lock connection structure of a rectangular connector according to claim 4, characterized in that: The fixing component (7) includes a cylinder (71), the lower surface of which is fixedly connected to the upper surface of the socket (3), a pressure plate (72) is slidably sleeved on the inner wall of the cylinder (71), a second spring (74) is fixedly connected to the lower surface of the pressure plate (72), one end of the second spring (74) away from the pressure plate (72) is fixedly connected to the upper surface of the socket (3), and a limiting plate (75) is fixedly connected to the lower surface of the pressure plate (72). One side of the limiting plate (75) is inclined at a certain angle, and the limiting plate (75) is adapted to the inner wall of the fixing hole (63).

8. The quick-locking connection structure of a rectangular connector according to claim 7, characterized in that: A pull rod (73) is rotatably connected to the upper surface of the pressure plate (72). A limiting plate (8) is fixedly sleeved on the surface of the pull rod (73). A positioning block (12) is fixedly connected to the surface of the cylinder (71). A limiting groove (2) is opened on the upper surface of the positioning block (12). One side of the limiting plate (8) is adapted to the inner wall of the limiting groove (2).

9. The quick-locking connection structure of a rectangular connector according to claim 4, characterized in that: The number of the snap-fit ​​components (4) is two, and the two snap-fit ​​components (4) are symmetrically arranged on both sides of the socket (3) with the vertical center line on the back of the socket (3) as the axis of symmetry.

10. The quick-lock connection structure of a rectangular connector according to claim 4, characterized in that: The inner wall of the plug (1) is fixedly connected with a spring piece (13), which is arc-shaped.

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