Quick connector based on switch cabinet cable and its use method

Abstract

The present invention relates to the technical field of cable joints, specifically to a quick joint based on switch cabinet cables and a method of use, comprising a cable and a rectangular seat that fits the surface of the cable, and calipers are provided on both sides of the rectangular seat. This quick joint based on switch cabinet cables and a method of use, penetrates the outer skin of the cable through a cone head composed of metal sheets, and each movable plate progressively contacts the force-bearing edges at different positions from bottom to top, so that the metal sheet that penetrates the cable skin is bent upward along the outside, and then passes through the cable skin again to curl. Compared with the existing straight cutting and breaking the skin, the above-mentioned annularly distributed metal sheets can break the skin in a circumferential direction and self-roll, thereby providing multi-point connection, and when there is a slight offset between the cable and the rectangular seat, the bent metal sheet can be autonomously fixed along the cable skin independently of the rectangular seat, reducing the friction between the metal sheet and the cable core, and on the other hand, the side edges of the metal sheet complement each other, which can effectively avoid the side edge from cutting the skin twice.

Description

Technical Field

[0001] The invention relates to the technical field of cable connectors, and in particular to a quick connector based on a switch cabinet cable and a use method thereof. Background Art

[0002] In life, the use of wires and cables can be seen everywhere. For example, switch cabinets generally need to be connected to the network using cables. In many cases, other electrical appliances or even circuits need to be connected to the existing cables. Usually, it is necessary to cut off the power, process the existing wiring, peel off the insulation layer to expose the copper core, make full contact and wrap the copper core of the line to be connected with the copper core of the existing wiring, and then use insulating tape for subsequent processing. This method is time-consuming and labor-intensive and has certain safety hazards.

[0003] There are also some quick connectors in the prior art, which use a guillotine structure to press the blade of the guillotine to cut the insulation layer of the existing wiring and contact the copper core of the existing wiring. The corresponding connection block is connected to the copper core that needs to be connected to the circuit, and then the two connection blocks are docked to achieve quick access to other electrical appliances.

[0004] The existing patent (publication number: CN117117524B) discloses a switch cabinet cable quick connector, which includes: a clamping part, the clamping part is used to clamp the cable, a clamping hole is formed inside the clamping part, and the cable is inserted into the clamping hole; a blade part, the blade part is arranged on the side of the clamping part close to the cable; the blade part has a first tip and a second tip, the blade part can be deformed before and after the cable is inserted and has a corresponding initial position and clamping position: when in the initial position, the first tip is close to the axis of the clamping hole, and the second tip is away from the axis of the clamping hole; when in the clamping position, the first tip and the second tip are both in contact with the inner core of the cable; the blade part is made of conductive material. In the above-mentioned prior art, a flat blade is used to cut into the cable, and after bending, the incision is easily enlarged due to radial movement. After disassembly, there is a lack of active measures to handle the incision, and the cable sheath is easily broken due to the incision.

[0005] In view of this, we propose a quick connector based on switch cabinet cable and a use method. Summary of the invention

[0006] The purpose of the present invention is to provide a quick connector based on switch cabinet cables and a method of use, so as to solve the problem that the existing technology proposed in the above background technology uses a flat blade to cut into the cable, and the incision is easily enlarged due to radial movement after bending, and there is a lack of active measures to deal with the incision after disassembly, and the cable sheath is easily broken due to the incision. To achieve the above purpose, the present invention provides the following technical solutions: A quick connector based on switch cabinet cables, including a cable and a rectangular seat that fits the surface of the cable, calipers are provided on both sides of the rectangular seat, and the calipers are symmetrically distributed along the rectangular seat, and a quick clamp is provided between the caliper and the rectangular seat.

[0007] The quick clamp includes a horizontal hole opened along the side surface of the matrix seat, and a rotating shaft is rotatably connected in the horizontal hole. A vertical hole connected to the horizontal hole is opened inside the matrix seat, and a gear is rotatably connected in the vertical hole. A worm wheel is fixedly connected to the top of the gear, and a worm that matches the worm wheel is arranged on the rotating shaft.

[0008] A slide groove matched with the caliper is provided on the side surface of the square seat, and the caliper forms a transverse sliding connection along the slide groove, and a tooth pattern is provided on the inner side of the caliper relative to the slide groove.

[0009] The slide groove is communicated with the vertical hole, and part of the tooth surface of the gear passes through the vertical hole and meshes with the tooth pattern.

[0010] The square seat is provided with a skin-breaking component matched with the cable.

[0011] Preferably, the skin breaking component includes a through hole opened on the surface of the square seat, and a knob is rotatably connected in the through hole, and two protruding teeth are fixedly provided on the bottom of the knob.

[0012] A base ring is movably arranged inside the through hole, and two notches corresponding to the convex teeth are arranged on the surface of the base ring, and the convex teeth are inserted into the notches.

[0013] A plurality of metal sheets are fixedly connected to the bottom of the base ring, and a plurality of metal sheets in an annular array form a cone head structure.

[0014] A stud is screwed onto the knob via a thread.

[0015] A plurality of stress-bearing edges are fixedly arranged on the inner side of the surface of the metal sheet, a plurality of movable plates corresponding to the stress-bearing edges are arranged on the inner side of the metal sheet, and the plurality of movable plates are fixedly connected by a connecting rod at the center of the circle, and a pressure plate matching the stress-bearing edges is slidably sleeved on the surface of the connecting rod between two adjacent movable plates.

[0016] The knob, the convex teeth and the base ring are provided with a notched full circle component.

[0017] Preferably, the cut-out full-circle component includes a slot opened on the base ring, and the bottom end of the slot passes through the convex tooth, and a non-return bolt is slidably connected in the slot.

[0018] The top surface of the base ring is provided with a non-return spring sheet matched with the non-return bolt.

[0019] Preferably, a spline hole is provided on the end of the rotating shaft close to the outside.

[0020] Preferably, an auxiliary ring matching the metal sheet is fixedly connected inside the through hole.

[0021] Preferably, a screw hole matching with the stud is provided on the knob, and the thread of the screw hole is located in the middle and lower part.

[0022] Preferably, the top surface of the knob is provided with a prying opening that cooperates with the slot and the anti-return bolt.

[0023] A quick connector based on a switch cabinet cable and a method of use, comprising the following steps:

[0024] S1. Select the connection position on the cable and fit the square seat on its surface. At this time, the clamps on both sides cover the two sides of the cable. Rotate the shaft to make the worm drive the gear along the worm wheel to rotate. The gears on both sides pull the clamps on both sides to move relative to each other, and the square seat can be locked on the cable.

[0025] S2. After the square seat is installed along the cable, use a screwdriver to rotate the stud so that it moves down along the knob, which in turn drives the knob to rotate synchronously. The convex teeth at the bottom of the knob rotate out of the cutout through a circular motion and push the metal sheet down along the base ring until the cone head composed of the metal sheet penetrates the outer skin of the cable. During this process, the stud that moves down squeezes the movable plate, so that each movable plate progressively contacts the force-bearing edges at different positions from bottom to top, so that the metal sheet that penetrates the cable skin bends upward along the outside and passes through the cable skin again to curl.

[0026] S3. After the convex teeth squeeze the base ring and rotate to its top surface, the convex teeth pass over the anti-return spring sheet, and the anti-return bolt on the convex teeth locks with the anti-return spring sheet. When removing the square seat, turn the knob. At this time, the convex teeth use the anti-return bolt to push the base ring to rotate along the anti-return spring sheet. The metal sheet that moves synchronously with the base ring uses its side to cut off the cable skin that is broken by it, so that the broken part forms a circular incision.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] In the present invention, by covering both sides of the cable with calipers, the rotating shaft is rotated so that the worm drives the gear to rotate along the worm wheel, and the gears on both sides pull the calipers on both sides to move relative to each other, and the rectangular seat can be locked on the cable. Compared with the existing split fixing structure, the caliper for external fixing and the rectangular seat for connecting the cable core are also in a connected state when not installed, and there is no need for the operator to perform manual assembly along the cable surface. On the one hand, it can improve the convenience of transportation and carrying, and it is not easy to lose accessories. On the other hand, the installation process is more convenient.

[0029] In the present invention, the convex teeth at the bottom of the knob are rotated out of the incision through a circular motion, and the metal sheet is pushed downward along the base ring until the cone head composed of the metal sheets penetrates the outer skin of the cable. In this process, the downward-moving stud squeezes the movable plate, so that each movable plate progressively contacts the force-bearing edges at different positions from bottom to top, so that the metal sheet that penetrates the cable skin is bent upward along the outside, and then passes through the cable skin again to be curled. Compared with the existing straight cutting and breaking skin, the above-mentioned annularly distributed metal sheets can break the outer skin in a circular direction and self-roll, thereby providing multi-point connection. When there is a slight offset between the cable and the rectangular seat, the bent metal sheet can be autonomously fixed along the cable skin independently of the rectangular seat on the one hand, thereby reducing the friction between the metal sheet and the cable core. On the other hand, the side edges of the metal sheet complement each other, which can effectively avoid secondary cutting of the outer skin by the side edges.

[0030] In the present invention, after the base ring is squeezed by the convex teeth and rotated to its top surface, the convex teeth pass over the anti-return spring sheet, and the anti-return bolt on the convex teeth is locked with the anti-return spring sheet. When the square seat is disassembled, the knob is rotated. At this time, the convex teeth use the anti-return bolt to push the base ring to rotate along the anti-return spring sheet, and the metal sheet that moves synchronously with the base ring uses its side to cut off the cable skin that is broken by it, so that the broken part forms a circular incision. Compared with the existing straight-line incision, the above-mentioned curved metal sheet can trim the outer skin incision during the disassembly process. On the one hand, it is convenient to fill and close the place, and on the other hand, it can also prevent the incision on the outer skin from extending under subsequent force conditions, which has better safety in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the cable, the rectangular seat and the caliper of the present invention;

[0032] Figure 2 An exploded view of the square seat and the caliper of the present invention;

[0033] Figure 3 For the present invention Figure 2 The enlarged view of point A in the middle;

[0034] Figure 4 It is a three-dimensional structural cross-sectional view of the square seat of the present invention;

[0035] Figure 5 is a three-dimensional structural cross-sectional view of a through hole of the present invention;

[0036] Figure 6 The three-dimensional structure of the knob and base ring of the present invention is shown in FIG. Figure 1 ;

[0037] Figure 7 The three-dimensional structure of the knob and base ring of the present invention is shown in FIG. Figure 2 ;

[0038] Figure 8 It is a three-dimensional structural cross-sectional view of the base ring, movable plate and pressure plate of the present invention;

[0039] Fig. 9 It is a schematic diagram of the three-dimensional structure of the knob and the stud of the present invention.

[0040] In the figure: 1. cable; 2. square seat; 3. caliper; 4. quick clamp; 41. horizontal hole; 42. rotating shaft; 43. vertical hole; 44. gear; 45. worm wheel; 46. worm; 47. slide groove; 48. tooth pattern; 49. skin-breaking component; 491. through hole; 492. knob; 493. convex tooth; 494. base ring; 495. notch; 496. metal sheet; 497. stud; 498. force-bearing edge; 499. movable plate; 4910. connecting rod; 4911. pressure plate; 4912. notched full circle component; 49121. slot; 49122. anti-return bolt; 49123. anti-return spring. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical staff in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figures 1 to 9 The present invention provides a technical solution: a quick connector based on a switch cabinet cable, comprising a cable 1 and a rectangular seat 2 attached to the surface of the cable 1, clamps 3 are arranged on both sides of the rectangular seat 2, and the clamps 3 are symmetrically distributed along the rectangular seat 2, and a quick clamp 4 is arranged between the clamp 3 and the rectangular seat 2. A connection position is selected on the cable 1, and the rectangular seat 2 is attached to its surface. At this time, the clamps 3 on both sides cover the two sides of the cable 1, and the quick clamp 4 is used to drive the clamp 3 to be fixed along the surface of the cable 1.

[0043] The quick clamp 4 includes a transverse hole 41 formed along the side surface of the matrix base 2, and a rotating shaft 42 is rotatably connected in the transverse hole 41. A vertical hole 43 connected to the transverse hole 41 is formed inside the matrix base 2, and a gear 44 is rotatably connected in the vertical hole 43. A worm wheel 45 is fixedly connected to the top end of the gear 44, and a worm 46 matching the worm wheel 45 is provided on the rotating shaft 42.

[0044] A slide groove 47 matching with the caliper 3 is formed on the side surface of the base 2 , and the caliper 3 forms a transverse sliding connection along the slide groove 47 . A tooth pattern 48 is formed on the inner side of the caliper 3 relative to the slide groove 47 .

[0045] The slide groove 47 is connected to the vertical hole 43, and part of the tooth surface of the gear 44 passes through the vertical hole 43 and meshes with the tooth pattern 48. The rotating shaft 42 is rotated to make the worm 46 push the gear 44 to rotate along the worm wheel 45. The gears 44 on both sides pull the calipers 3 on both sides to move relative to each other, and the matrix seat 2 can be locked on the cable 1.

[0046] A skin-breaking component 49 matching with the cable 1 is arranged on the rectangular base 2 .

[0047] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the skin-breaking component 49 includes a through hole 491 opened on the surface of the rectangular base 2, and a knob 492 is rotatably connected in the through hole 491, and two protruding teeth 493 are fixedly provided at the bottom of the knob 492.

[0048] A base ring 494 is movably disposed inside the through hole 491 , and a surface of the base ring 494 is provided with two notches 495 corresponding to the protruding teeth 493 , and the protruding teeth 493 are inserted into the notches 495 .

[0049] A plurality of metal sheets 496 are fixedly connected to the bottom of the base ring 494, and a ring-shaped array of the metal sheets 496 forms a cone head structure.

[0050] A stud 497 is screwed onto the knob 492 through a thread. When the stud 497 is rotated to move downward along the knob 492, the knob 492 is simultaneously driven to rotate. The convex tooth 493 at the bottom of the knob 492 rotates out of the incision through a circular motion and pushes the metal sheet 496 downward along the base ring 494 until the cone head formed by the metal sheet 496 penetrates the outer skin of the cable 1.

[0051] A plurality of force-bearing edges 498 are fixedly provided on the inner side of the surface of the metal sheet 496, and a plurality of movable plates 499 corresponding to the force-bearing edges 498 are provided on the inner side of the metal sheet 496, and the plurality of movable plates 499 are fixedly connected by a connecting rod 4910 at the center of the circle. A pressure plate 4911 matching the force-bearing edges 498 is slidably sleeved on the surface of the connecting rod 4910 between two adjacent movable plates 499, and the downwardly moved stud 497 squeezes the movable plate 499 so that each movable plate 499 progressively contacts the force-bearing edges 498 at different positions from bottom to top, so that the metal sheet 496 penetrating the cable skin is bent upward along the outer side and passes through the cable skin again for curling. The pressure plate 4911, the connecting rod 4910, the metal sheet 496, and the base ring 494 are all made of conductive materials, and a cable connected to the above components is provided on the rectangular seat 2 so as to be connected after the metal sheet 496 breaks the outer skin of the cable 1.

[0052] The knob 492 , the protruding teeth 493 and the base ring 494 are provided with a notched full circle component 4912 .

[0053] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the cut full circle component 4912 includes a slot 49121 opened on the base ring 494, and the bottom end of the slot 49121 passes through the convex tooth 493, and a check bolt 49122 is slidably connected in the slot 49121.

[0054] The top surface of the base ring 494 is provided with a non-return spring piece 49123 that cooperates with the non-return bolt 49122. After the convex tooth 493 squeezes the base ring 494 and rotates to its top surface, the convex tooth 493 passes over the non-return spring piece 49123, and the non-return bolt 49122 on the convex tooth 493 is locked with the non-return spring piece 49123. When the matrix seat 2 is disassembled, the knob 492 is rotated. At this time, the convex tooth 493 uses the non-return bolt 49122 to push the base ring 494 to rotate along the non-return spring piece 49123, and the metal sheet 496 that moves synchronously with the base ring 494 uses its side edge to cut off the cable skin broken by it.

[0055] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, a spline hole is provided on the end of the rotating shaft 42 close to the outside, and the operator needs to use a spline tool to rotate the rotating shaft 42, thereby preventing an unrelated person from rotating the rotating shaft 42 to stabilize the connection.

[0056] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, an auxiliary ring matching with the metal sheet 496 is fixedly connected inside the through hole 491. When the metal sheet 496 is pressed down and bent upward, the tip of the metal sheet 496 can press upward against the auxiliary ring, and the auxiliary ring assists the bending of the metal sheet 496.

[0057] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, a screw hole matching with the stud 497 is provided on the knob 492 , and the thread of the screw hole is located in the middle and lower part, so after the stud 497 is rotated outward to a certain position, the stud 497 cannot be further rotated out, but is connected to the knob 492 .

[0058] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the top surface of the knob 492 is provided with a prying opening that cooperates with the slot 49121 and the anti-return bolt 49122. The operator can use a screwdriver to easily lift the anti-return bolt 49122 along the prying opening, so that the anti-return bolt 49122 disconnects the reverse lock along the anti-return spring sheet 49123.

[0059] A method for using a quick connector based on a switch cabinet cable comprises the following steps:

[0060] S1. Select a connection position on the cable 1 and fit the matrix base 2 on its surface. At this time, the clamps 3 on both sides cover the cable 1 on both sides. Rotate the shaft 42 to make the worm 46 push the gear 44 to rotate along the worm wheel 45. The gears 44 on both sides pull the clamps 3 on both sides to move relative to each other, and the matrix base 2 can be locked on the cable 1.

[0061] S2. After the installation of the square base 2 along the cable 1 is completed, the stud 497 is rotated by a screwdriver so that the stud 497 moves downward along the knob 492, and the knob 492 is simultaneously driven to rotate. The convex teeth 493 at the bottom of the knob 492 rotate out of the incision through a circular motion, and push the metal sheet 496 downward along the base ring 494 until the cone head composed of the metal sheet 496 penetrates the outer skin of the cable 1. During this process, the stud 497 that moves downward squeezes the movable plate 499, so that each movable plate 499 progressively contacts the force-bearing edge 498 at different positions from bottom to top, so that the metal sheet 496 that penetrates the cable skin bends upward along the outside, and passes through the cable skin again to curl.

[0062] S3. After the convex tooth 493 squeezes the base ring 494 and rotates to its top surface, the convex tooth 493 passes over the anti-return spring sheet 49123, and the anti-return bolt 49122 on the convex tooth 493 is locked with the anti-return spring sheet 49123. When the matrix seat 2 is removed, the knob 492 is rotated. At this time, the convex tooth 493 uses the anti-return bolt 49122 to push the base ring 494 to rotate along the anti-return spring sheet 49123, and the metal sheet 496 that moves synchronously with the base ring 494 uses its side edge to cut off the cable skin that is broken by it, so that the broken part forms a circular incision.

[0063] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A quick connector based on a switch cabinet cable, comprising a cable (1) and a rectangular seat (2) attached to the surface of the cable (1), characterized in that: Calipers (3) are provided on both sides of the matrix base (2), and the calipers (3) are symmetrically distributed along the matrix base (2), and a quick clamp (4) is provided between the calipers (3) and the matrix base (2); The quick clamp (4) comprises a transverse hole (41) formed along a side surface of the matrix base (2), a rotating shaft (42) being rotatably connected in the transverse hole (41), a vertical hole (43) being formed inside the matrix base (2) and communicating with the transverse hole (41), a gear (44) being rotatably connected in the vertical hole (43), a worm wheel (45) being fixedly connected at the top end of the gear (44), and a worm (46) being matched with the worm wheel (45) being provided on the rotating shaft (42); A slide groove (47) matching with the caliper (3) is formed on the side surface of the rectangular seat (2), and the caliper (3) forms a transverse sliding connection along the slide groove (47), and a tooth pattern (48) is formed on the inner side of the caliper (3) relative to the slide groove (47); The slide groove (47) is in communication with the vertical hole (43), and a portion of the tooth surface of the gear (44) passes through the vertical hole (43) and meshes with the tooth pattern (48); The rectangular seat (2) is provided with a skin-breaking component (49) that matches the cable (1); The skin-breaking component (49) comprises a through hole (491) formed on the surface of the rectangular seat (2), and a knob (492) is rotatably connected in the through hole (491), and two protruding teeth (493) are fixedly provided at the bottom of the knob (492); A base ring (494) is movably disposed inside the through hole (491), and a surface of the base ring (494) is provided with two notches (495) corresponding to the convex teeth (493), and the convex teeth (493) are inserted into the notches (495); A plurality of metal sheets (496) are fixedly connected to the bottom of the base ring (494), and a ring-shaped array of the plurality of metal sheets (496) forms a cone head structure; The knob (492) is screwed with a stud (497) via a thread. A plurality of force-bearing edges (498) are fixedly arranged on the inner side of the surface of the metal sheet (496), a plurality of movable plates (499) corresponding to the force-bearing edges (498) are arranged on the inner side of the metal sheet (496), and the plurality of movable plates (499) are fixedly connected via a connecting rod (4910) at the center of a circle, and a pressure plate (4911) matching the force-bearing edges (498) is slidably sleeved on the surface of the connecting rod (4910) between two adjacent movable plates (499); The knob (492), the convex teeth (493) and the base ring (494) are provided with a notched full-circle component (4912); The notched full-circle component (4912) comprises a slot (49121) formed on the base ring (494), wherein the bottom end of the slot (49121) passes through the convex tooth (493), and a non-return bolt (49122) is slidably connected in the slot (49121); The top surface of the base ring (494) is provided with a non-return spring sheet (49123) that matches the non-return bolt (49122).

2. The switch cabinet cable quick connector according to claim 1, characterized in that: A spline hole is provided on the end of the rotating shaft (42) close to the outside.

3. The switch cabinet cable quick connector according to claim 2, characterized in that: An auxiliary ring matching the metal sheet (496) is fixedly connected to the interior of the through hole (491).

4. The switch cabinet cable quick connector according to claim 3, characterized in that: The knob (492) is provided with a screw hole that matches the screw thread (497), and the thread of the screw hole is located at the middle and lower part.

5. The switch cabinet cable quick connector according to claim 4, characterized in that: The top surface of the knob (492) is provided with a prying opening that cooperates with the slot (49121) and the anti-return bolt (49122).

6. The method for using the switch cabinet cable quick connector according to claim 5 comprises the following steps: S1. Select a connection position on the cable (1) and fit the matrix (2) on its surface. At this time, the clamps (3) on both sides cover the cable (1) on both sides. Rotate the shaft (42) so that the worm (46) drives the gear (44) along the worm wheel (45) to rotate. The gears (44) on both sides pull the clamps (3) on both sides to move relative to each other. Then, the matrix (2) can be locked on the cable (1). S2. After the installation of the square seat (2) along the cable (1) is completed, the stud (497) is rotated by a screwdriver so that the stud (497) is moved downward along the knob (492), and the knob (492) is simultaneously driven to rotate. The protruding teeth (493) at the bottom of the knob (492) are rotated out of the cutout through a circular motion and push the metal sheet (496) downward along the base ring (494) until the cone head composed of the metal sheet (496) penetrates the outer skin of the cable (1). During this process, the stud (497) that moves downward squeezes the movable plate (499), so that each movable plate (499) progressively contacts the force-bearing edges (498) at different positions from bottom to top, so that the metal sheet (496) that penetrates the cable (1) skin is bent upward along the outer side and passes through the cable (1) skin again to be curled; S3. After the convex teeth (493) squeeze the base ring (494) and rotate to the top surface thereof, the convex teeth (493) pass over the anti-return spring sheet (49123), and the anti-return bolt (49122) on the convex teeth (493) is locked with the anti-return spring sheet (49123). When the square seat (2) is removed, the knob (492) is rotated. At this time, the convex teeth (493) use the anti-return bolt (49122) to push the base ring (494) to rotate along the anti-return spring sheet (49123), and the metal sheet (496) that moves synchronously with the base ring (494) uses its side edge to cut off the cable (1) skin that is broken by it, so that the broken part forms a circular incision.

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