Multi-tap automatic telescopic test wire coil device

Abstract

The invention relates to a multi-tap automatic telescopic test wire coil device, and belongs to the technical field of test wire coils. The device comprises a case, a plurality of first mounting grooves arranged at intervals are formed in the case, and a first winding assembly is arranged in each mounting groove. The first winding assembly comprises a first mounting disc, a first mounting column, a first winding roll and a first winding spring. One end of the first winding reel is connected with the first contact, and the other end of the first winding reel is connected with the main cable. A second winding assembly is arranged in a second mounting groove of the case and used for winding the main cable, and the other end of the main cable is connected with a second contact. The problem that in the prior art, mistakes are prone to being made when lines are frequently switched is solved, the use experience of the test wire coil is optimized, and the test wire coil is suitable for various complex test scenes and has high practicability and innovativeness.

Description

Technical Field

[0001] The invention relates to the technical field of automatic test reels, and in particular to a multi-tap automatic telescopic test reel device. Background Art

[0002] In the field of power systems, electronic equipment testing, and various electrical tests, test reels are key tools for connecting test equipment to the object under test. Traditional test reels usually use fixed-length wires and cannot flexibly adjust the wire length according to the actual test scenario. This not only limits the tester's operating range, but may also cause the wires to be disorganized and increase safety risks during the test process. In addition, traditional devices often require manual connection and switching of lines in multi-tap test scenarios, which is cumbersome and error-prone, seriously affecting test efficiency and accuracy. Summary of the invention

[0003] The present invention provides a multi-tap automatic telescopic test reel device, which solves the problem of frequent line switching and easy error in the prior art.

[0004] The technical solution of the present invention is as follows:

[0005] A multi-tap automatic telescopic test reel device comprises a chassis, the chassis comprises a plurality of first installation slots arranged at intervals, a plurality of first winding assemblies are arranged at intervals in the first installation slots;

[0006] The first winding assembly includes a first mounting plate fixedly mounted on the chassis and located in one of the first mounting grooves, and one side of the first mounting plate is open, and the first mounting plate has a first mounting post located in the opening, and also includes a first wire winding reel rotatably mounted on the first mounting post, and also includes a first wire winding spring with one end mounted on the first wire winding reel and the other end mounted on the first mounting plate and located in the opening, the first wire winding spring is used to provide a force for the first wire winding reel to rotate, a drop cable is wound around the first wire winding reel, one end of the drop cable passes through the chassis and a first contact is arranged at the end;

[0007] The chassis has a second installation slot, and a second winding assembly is installed in the second installation slot, the second winding assembly is used to wind up the main cable, the other end of the branch cable is electrically connected to one end of the main cable, and the other end of the main cable passes through the chassis and is provided with a second contact at the end.

[0008] As a further technical solution, a second mounting groove is provided with a second mounting column, and a second cable winding reel is rotatably arranged on the second mounting column. The second winding assembly includes a second cable winding spring with one end arranged on the chassis and located in the second mounting groove, and the other end of the second cable winding spring is arranged on the second cable winding reel. The second cable winding spring is used to provide force for the rotation of the second cable winding reel, and the main cable is wound on the second cable winding reel.

[0009] As a further technical solution, the invention further comprises a switch assembly arranged on the chassis and located in the second installation groove, wherein the switch assembly is used to control whether the branch cable and the main cable are connected or not.

[0010] As a further technical solution, the switch assembly includes a switch box arranged in the second mounting groove, the switch box having an mounting cavity, the switch box having a plurality of arranged mounting holes on the top, a sliding button slidably arranged in the mounting hole, one end of the main cable and the branch cable connected is arranged in the mounting cavity, and a first conductive sheet is arranged at the end of the main cable, a supporting platform for fixing the first conductive sheet is provided in the mounting cavity, a plurality of conductive elastic members are arranged on the first conductive sheet, the conductive elastic members are used to provide a force for the sliding button to move away from the first conductive sheet, the conductive elastic members and the mounting holes are arranged one-to-one, the side wall of the switch box has a plurality of through holes arranged one-to-one with the mounting holes, the through holes are used to pass the branch cable, the end of the branch cable used to communicate with the main cable is provided with a second conductive sheet, the second conductive sheet is arranged on the sliding button, the bottom of the sliding button is made of conductive material, and after the sliding button contacts the conductive elastic member, the branch cable and the main cable are electrically connected.

[0011] As a further technical solution, the switch assembly also includes a plurality of slide cylinders arranged on the switch box and located in the mounting cavity, the plurality of slide cylinders and the mounting holes are arranged in one-to-one correspondence, the bottom of the slide cylinder has a plurality of first teeth, and an avoidance groove is arranged between two of the first teeth, the sliding button has a plurality of second teeth on the side away from the mounting hole, the slide cylinder has a spiral slide groove, the sliding button has a protrusion, the sliding button is slidably and rotatably arranged in the slide cylinder, after the sliding button slides in the slide cylinder, the first teeth and the second teeth are meshed or the first teeth slide into the avoidance groove, after the first teeth and the second teeth are meshed, the bottom of the sliding button abuts against the conductive elastic member.

[0012] As a further technical solution, an end cover is also included, and the end cover is used to cover the chassis.

[0013] As a further technical solution, the first winding assembly also includes a mounting piece arranged on the first mounting disk, the mounting piece having a guide groove, a guide rod arranged in the guide groove, the guide rod having a forward thread groove and a reverse thread groove arranged crosswise with each other, a guide wheel is also rotatably arranged on the guide rod, the guide wheel has a clamping portion, the branch cable is used to be arranged on the clamping portion, after the branch cable moves around the first winding disk, the guide wheel is driven to rotate on the guide rod, the guide wheel has a protrusion, the protrusion is slidably arranged in the forward thread groove and the reverse thread groove, after the guide wheel rotates on the guide rod, the guide wheel reciprocates on the guide rod.

[0014] As a further technical solution, the end cover has a plurality of arranged through slots, which are used to avoid the branch cable located on the clamping portion, and a clamping ball is provided on the side of the branch cable close to the first contact, and the diameter of the clamping ball is greater than the width of the through slot.

[0015] The working principle and beneficial effects of the present invention are:

[0016] In the present invention, the device includes a chassis, and a plurality of first installation slots arranged at intervals are provided inside the chassis for installing a plurality of first winding assemblies. Each first winding assembly includes a first installation disk fixed on the chassis, one side of the installation disk is open, and a first installation column is provided inside. The first winding reel is rotatably arranged in the first installation disk through the first installation column, and at the same time, one end of the first winding spring is fixed on the first winding reel, and the other end is fixed in the opening of the first installation disk, so as to provide elastic force for automatic winding of the winding reel. The branch cable is wound on the first winding reel, one end of which passes through the chassis and is connected to a first contact for connecting to an external test device. In addition, the chassis is also provided with a second installation slot for installing a second winding assembly, which is responsible for winding the main cable. The other end of the branch cable is electrically connected to one end of the main cable, and the other end of the main cable passes through the chassis and is connected to a second contact for connecting to a main power supply or other main equipment. Through this design, the device realizes the automatic extension and retraction function of the branch cable and the main cable, and supports flexible connection of multiple branches to meet the needs of different test scenarios, improves the convenience and safety of using the test cable reel, and solves the problem of frequent line switching and easy errors in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the first viewing angle axial structure of the present invention;

[0019] Figure 2This is a schematic diagram of the shaft structure of the first winding assembly of the present invention;

[0020] Figure 3 Based Figure 2 A local enlarged structural schematic diagram;

[0021] Figure 4 This is a schematic diagram of the shaft structure without end cover of the present invention;

[0022] Figure 5 This is a schematic diagram of the axial structure of the first mounting plate of the present invention;

[0023] Figure 6 for Figure 5 A schematic diagram of the local enlarged structure at B;

[0024] Figure 7 This is a schematic diagram of the structure of the switch assembly of the present invention from a first viewing angle;

[0025] Figure 8 It is a schematic diagram of the cross-sectional structure of the switch assembly of the present invention;

[0026] Fig. 9 for Figure 8 A schematic diagram of the local enlarged structure at C;

[0027] Fig.10 It is a schematic diagram of the axial structure of the switch assembly of the present invention from a second viewing angle.

[0028] In the figure: 100, chassis, 101, first mounting slot, 103, support platform, 104, end cover,

[0029] 200, first winding assembly, 201, first mounting plate, 2011, opening, 202, first mounting column, 203, first winding drum, 204, first winding spring, 205, branching cable, 206, first contact, 207, second mounting groove, 2051, second conductive sheet, 208, mounting member, 209, guide groove, 210, guide rod, 211, forward thread groove, 212, reverse thread groove, 213, guide wheel, 105, through groove, 214, clamping portion, 215, clamping ball;

[0030] 300, second winding assembly, 301, main cable, 3011, first conductive sheet, 302, second contact, 303, second mounting post, 304, second winding drum, 305, second winding spring;

[0031] 400. Switch assembly; 401. Switch box; 402. Mounting cavity; 403. Mounting hole; 404. Sliding button; 405. Conductive elastic member; 406. Through hole; 407. Sliding cylinder; 408. First tooth; 409. Avoidance groove; 410. Second tooth; 411. Spiral slide groove; 412. Protrusion. DETAILED DESCRIPTION

[0032] The following will be combined with 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 technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example

[0034] like Figure 1-Figure 4 As shown, a multi-tap automatic retractable test reel device includes a chassis 100, the chassis 100 includes a plurality of first installation slots 101 arranged at intervals, and a plurality of first winding assemblies 200 are arranged at intervals in the first installation slots 101;

[0035] The first winding assembly 200 includes a first mounting plate 201 fixedly mounted on the chassis 100 and located in a first mounting groove 101, and one side of the first mounting plate 201 is opened 2011, and the first mounting plate 201 has a first mounting post 202 located in the opening 2011, and also includes a first cable reel 203 rotatably mounted on the first mounting post 202, and also includes a first cable winding spring 204 with one end mounted on the first cable reel 203 and the other end mounted on the first mounting plate 201 and located in the opening 2011, the first cable winding spring 204 is used to provide a force for the first cable reel 203 to rotate, and a branch cable 205 is wound around the first cable reel 203, one end of the branch cable 205 passes through the chassis 100 and a first contact 206 is arranged at the end;

[0036] The chassis 100 has a second installation groove 207, and a second winding assembly 300 is installed in the second installation groove 207. The second winding assembly 300 is used to wind up the main cable 301. The other end of the branch cable 205 is electrically connected to one end of the main cable 301. The other end of the main cable 301 passes through the chassis 100 and is provided with a second contact 302 at the end.

[0037] In this embodiment, the device includes a chassis 100, and a plurality of first installation slots 101 arranged at intervals are provided inside the chassis 100 for installing a plurality of first winding assemblies 200. Each first winding assembly 200 includes a first installation disk 201 fixed on the chassis 100, and the installation disk has an opening 2011 on one side, and a first installation column 202 is provided inside. The first winding reel 203 is rotatably arranged in the first installation disk 201 through the first installation column 202, and at the same time, one end of the first winding spring 204 is fixed on the first winding reel 203, and the other end is fixed in the opening 2011 of the first installation disk 201, so as to provide elastic force for automatic winding of the winding reel. The branch cable 205 is wound on the first winding reel 203, and one end thereof passes through the chassis 100 and is connected to the first contact 206 for connecting with an external test device. In addition, the chassis 100 is also provided with a second installation slot 207 for installing the second winding assembly 300, which is responsible for winding the main cable 301. The other end of the tap cable 205 is electrically connected to one end of the main cable 301, and the other end of the main cable 301 passes through the chassis 100 and is connected to a second contact 302 for connecting to a main power source or other main equipment. Through this design, the device realizes the automatic retractable function of the tap cable 205 and the main cable 301, and supports flexible connection of multiple taps to meet the needs of different test scenarios, improves the convenience and safety of the test cable reel, and solves the problem of frequent switching of lines and easy errors in the prior art.

[0038] like Figure 5 As shown, as a further technical solution, a second mounting groove 207 has a second mounting column 303, and a second winding drum 304 is rotatably arranged on the second mounting column 303. The second winding assembly 300 includes a second winding spring 305 at one end of which is arranged on the chassis 100 and located in the second mounting groove 207, and the other end of the second winding spring 305 is arranged on the second winding drum 304. The second winding spring 305 is used to provide force for the second winding drum 304 to rotate, and the main cable 301 is wound on the second winding drum 304.

[0039] In this embodiment, a second mounting column 303 is provided in the second mounting groove 207, and the second winding drum 304 is rotatably arranged on the second mounting column 303 through a bearing. The second winding assembly 300 includes a second winding spring 305, one end of which is fixed on the chassis 100 and located in the second mounting groove 207, and the other end is fixed on the second winding drum 304, and is used to provide elastic force for the rotation of the second winding drum 304. The main cable 301 is wound on the second winding drum 304, and the automatic retracting function of the main cable 301 is realized through the elastic action of the second winding spring 305. When the main cable 301 needs to be used, the main cable 301 is pulled to extend from the chassis 100, and the second winding spring 305 is tightened at this time; after use, the main cable 301 is released, and the second winding spring 305 releases energy, driving the second winding drum 304 to rotate, and the main cable 301 is automatically retracted. This design not only improves the ease of use of the main cable 301, but also effectively avoids the problem of cable clutter, thereby improving the overall performance and safety of the device.

[0040] like Figure 2 As shown, as a further technical solution, a switch assembly 400 is also included, which is arranged on the chassis 100 and located in the second installation groove 207. The switch assembly 400 is used to control whether the drop cable 205 and the main cable 301 are connected or not connected.

[0041] like Figure 4 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, in this embodiment, the multi-drop automatic retractable test cable drum device further includes a switch assembly 400 disposed in the second mounting slot 207 on the chassis 100. The switch assembly 400 is used to control the connection or disconnection state of the drop cable 205 and the main cable 301, thereby realizing flexible switching of the test line.

[0042] As a further technical solution, the switch assembly 400 includes a switch box 401 arranged in the second installation groove 207, the switch box 401 has an installation cavity 402, the top of the switch box 401 has a plurality of arranged installation holes 403, a sliding button 404 is slidably arranged in the installation hole 403, the main cable 301 and the branch cable 205 are connected at one end and arranged in the installation cavity 402, and the main cable 301 is provided with a first conductive sheet 3011 at the end, and the installation cavity 402 has a support platform 103 for fixing the first conductive sheet 3011, and the first conductive sheet 3011 is arranged on a plurality of conductive elastic members 405, and the conductive elastic members 405 are arranged on the first conductive sheet 3011. The electroelastic member 405 is used to provide a force for the sliding button 404 to move away from the first conductive sheet 3011. The conductive elastic member 405 and the mounting holes 403 are arranged one-to-one. The side wall of the switch box 401 has a plurality of through holes 406 arranged one-to-one corresponding to the mounting holes 403. The through holes 406 are used to pass the branch cable 205. The end of the branch cable 205 used to communicate with the main cable 301 is provided with a second conductive sheet 2051. The second conductive sheet 2051 is provided on the sliding button 404. The bottom of the sliding button 404 is made of conductive material. After the sliding button 404 contacts the conductive elastic member 405, the branch cable 205 and the main cable 301 are electrically connected.

[0043] In this embodiment, the switch assembly 400 includes a switch box 401 disposed in the second mounting groove 207. The switch box 401 has an installation cavity 402 inside, and a plurality of arranged installation holes 403 are provided on the top. A sliding button 404 is slidably disposed in each installation hole 403, and the bottom of the sliding button 404 is made of conductive material. The connecting ends of the main cable 301 and the branch cable 205 are both disposed in the installation cavity 402, and a first conductive sheet 3011 is disposed at the end of the main cable 301, and the first conductive sheet 3011 is fixed on the support platform 103 in the installation cavity 402. A plurality of conductive elastic members 405 are arranged on the first conductive sheet 3011, and the conductive elastic members 405 are arranged one by one corresponding to the installation holes 403, and are used to provide a force for the sliding button 404 to move away from the first conductive sheet 3011. The side wall of the switch box 401 is provided with a plurality of through holes 406 corresponding to the mounting holes 403. The end of the branch cable 205 used for connecting with the main cable 301 is provided with a second conductive sheet 2051, and the second conductive sheet 2051 is fixed on the sliding button 404. When the branch cable 205 and the main cable 301 need to be connected, the sliding button 404 is pressed, and the bottom of the sliding button 404 contacts and compresses the conductive elastic member 405, and at the same time, the second conductive sheet 2051 contacts the first conductive sheet 3011, so as to realize the electrical connection between the branch cable 205 and the main cable 301. When the sliding button 404 is released, the conductive elastic member 405 recovers its deformation, pushes the sliding button 404 to reset, and the branch cable 205 is disconnected from the main cable 301. This design realizes the rapid switching between the branch cable 205 and the main cable 301 through the cooperation of the sliding button 404 and the conductive elastic member 405, which is simple and reliable to operate, and effectively improves the flexibility and safety of the test cable reel device.

[0044] like Figure 4 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, as a further technical solution, the switch assembly 400 also includes a plurality of slide cylinders 407 arranged on the switch box 401 and located in the mounting cavity 402, and the plurality of slide cylinders 407 and the mounting holes 403 are arranged one-to-one. The bottom of the slide cylinder 407 has a plurality of first teeth 408, and an avoidance groove 409 is arranged between two first teeth 408. The side of the sliding button 404 away from the mounting hole 403 has a plurality of second teeth 410, and the slide cylinder 407 has a spiral slide groove 411, and the sliding button 404 has a protrusion 412. The sliding button 404 is slidably and rotatably arranged in the slide cylinder 407. After the sliding button 404 slides in the slide cylinder 407, the first teeth 408 and the second teeth 410 are meshed or the first teeth 408 slide into the avoidance groove 409. After the first teeth 408 and the second teeth 410 are meshed, the bottom of the sliding button 404 abuts against the conductive elastic member 405.

[0045] In this embodiment, the switch assembly 400 further optimizes the locking and unlocking mechanism of the sliding button 404 to improve the stability and reliability of the operation. Specifically, the switch assembly 400 is further provided with a plurality of slide cylinders 407 in the mounting cavity 402 of the switch box 401, and the slide cylinders 407 are arranged one by one with the mounting holes 403. A plurality of first teeth 408 are provided at the bottom of the slide cylinder 407, and an avoidance groove 409 is provided between two adjacent first teeth 408. A plurality of second teeth 410 are provided on the side of the sliding button 404 away from the mounting hole 403, which cooperate with the first teeth 408 in the slide cylinder 407. A spiral slide groove 411 is provided inside the slide cylinder 407, and a protrusion 412 matching the spiral slide groove 411 is provided on the sliding button 404, so that the sliding button 404 can both slide and rotate in the slide cylinder 407.

[0046] When the sliding button 404 slides in the slide cylinder 407, the first teeth 408 and the second teeth 410 will engage or separate. Specifically, when the sliding button 404 is pressed, the second teeth 410 engage with the first teeth 408, and the bottom of the sliding button 404 abuts against the conductive elastic member 405, thereby realizing the electrical connection between the branch cable 205 and the main cable 301. At this time, the sliding button 404 is locked in the slide cylinder 407 by the engagement of the teeth to prevent misoperation due to external force or vibration. When it is necessary to disconnect, the sliding button 404 is pulled upward, the second teeth 410 slide into the avoidance groove 409, the sliding button 404 separates from the conductive elastic member 405, and the branch cable 205 is disconnected from the main cable 301. Through this design, the switch assembly 400 not only realizes the rapid switching of the branch cable 205 and the main cable 301, but also ensures the stability and reliability of the connection through the engagement and avoidance mechanism of the teeth, further improving the performance and safety of the test reel device.

[0047] like Figure 1 As shown, as a further technical solution, an end cover 104 is also included, and the end cover 104 is used to cover the chassis 100.

[0048] In this embodiment, the multi-tap automatic retractable test reel device further includes an end cover 104, which is used to cover the chassis 100 to protect the components inside the device from the external environment and improve the overall aesthetics and safety of the device.

[0049] like Figure 4 and Figure 6As shown, as a further technical solution, the first winding component 200 also includes a mounting member 208 arranged on the first mounting disk 201, and the mounting member 208 has a guide groove 209, and a guide rod 210 is arranged in the guide groove 209, and the guide rod 210 has a forward thread groove 211 and a reverse thread groove 212 arranged crosswise with each other, and a guide wheel 213 is also rotatably arranged on the guide rod 210, and the guide wheel 213 has a clamping portion 214, and the branch cable 205 is used to be arranged on the clamping portion 214. After the branch cable 205 moves around the first winding drum 203, it drives the guide wheel 213 to rotate on the guide rod 210, and the guide wheel 213 has a protrusion 412, and the protrusion 412 is slidably arranged in the forward thread groove 211 and the reverse thread groove 212. After the guide wheel 213 rotates on the guide rod 210, the guide wheel 213 reciprocates on the guide rod 210.

[0050] In this embodiment, the first winding assembly 200 further includes a mounting member 208 disposed on the first mounting disk 201, and the mounting member 208 has a guide groove 209, and a guide rod 210 is disposed in the guide groove 209. The guide rod 210 is provided with a forward thread groove 211 and a reverse thread groove 212 arranged crosswise with each other. A guide wheel 213 is rotatably disposed on the guide rod 210, and the guide wheel 213 has a clamping portion 214, and the branch cable 205 is disposed on the clamping portion 214. When the branch cable 205 moves around the first winding disk 203, the guide wheel 213 rotates along the guide rod 210 driven by the branch cable 205. A protrusion 412 is provided on the outer side of the guide wheel 213, and the protrusion 412 is slidably disposed in the forward thread groove 211 and the reverse thread groove 212. As the guide wheel 213 rotates, the protrusion 412 slides in the thread groove, so that the guide wheel 213 realizes reciprocating motion on the guide rod 210. This design can effectively guide the branch cable 205 to remain neat during the winding and unwinding process, avoiding cable entanglement or knotting, and at the same time further improves the winding efficiency and reliability through the guiding effect of the thread groove.

[0051] like Figure 1 As shown, as a further technical solution, the end cover 104 has a plurality of arranged through slots 105, the through slots 105 are used to avoid the branch cable 205 located on the clamping portion 214, and a clamping ball 215 is provided on the side of the branch cable 205 close to the first contact 206, and the diameter of the clamping ball 215 is greater than the width of the through slot 105.

[0052] In this embodiment, the design of the end cover 104 of the multi-tap automatic retractable test cable reel device further optimizes the management and protection mechanism of the tap cable 205. The end cover 104 is provided with a plurality of arranged through slots 105, which are used to avoid the tap cable 205 located on the clamping portion 214, ensuring that the tap cable 205 can still be normally retracted after the end cover 104 is installed. In addition, a clamping ball 215 is provided on the side of the tap cable 205 close to the first contact 206, and the diameter of the clamping ball 215 is greater than the width of the through slot 105, so that after the end cover 104 is installed in place, the clamping ball 215 can effectively prevent the tap cable 205 from accidentally falling out of the through slot 105, ensuring the stability and safety of the cable.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-tap automatic retractable test reel device, characterized in that: The machine comprises a chassis (100), wherein the chassis (100) comprises a plurality of first installation slots (101) arranged at intervals, wherein a plurality of first winding assemblies (200) are arranged at intervals in the first installation slots (101); The first winding assembly (200) comprises a first mounting plate (201) for being fixedly mounted on the chassis (100) and located in one of the first mounting grooves (101), and the first mounting plate (201) has an opening (2011) on one side, and a first mounting column (202) is provided on the first mounting plate (201) and located in the opening (2011), and further comprises a first cable reel (203) rotatably mounted on the first mounting column (202), and further comprises a first cable reel spring (204) having one end mounted on the first cable reel (203) and the other end mounted on the first mounting plate (201) and located in the opening (2011), the first cable reel spring (204) being used to provide a force for rotating the first cable reel (203), and a branch cable (205) is wound around the first cable reel (203), one end of the branch cable (205) passes through the chassis (100) and a first contact (206) is provided at the end thereof; The chassis (100) has a second installation slot (207), and a second winding assembly (300) is installed in the second installation slot (207), the second winding assembly (300) is used to wind up the main cable (301), the other end of the branch cable (205) is electrically connected to one end of the main cable (301), and the other end of the main cable (301) passes through the chassis (100) and is provided with a second contact (302) at the end.

2. A multi-tap automatic retractable test reel device according to claim 1, characterized in that: The second mounting groove (207) has a second mounting post (303), and a second cable reel (304) is rotatably mounted on the second mounting post (303). The second winding assembly (300) comprises a second cable reel spring (305) having one end mounted on the chassis (100) and located in the second mounting groove (207), and the other end of the second cable reel spring (305) is mounted on the second cable reel (304). The second cable reel spring (305) is used to provide a force for the second cable reel (304) to rotate, and the main cable (301) is wound on the second cable reel (304).

3. A multi-tap automatic retractable test reel device according to claim 1, characterized in that: It also includes a switch assembly (400) disposed on the chassis (100) and located in the second installation slot (207), wherein the switch assembly (400) is used to control whether the branch cable (205) and the main cable (301) are connected or disconnected.

4. A multi-tap automatic retractable test reel device according to claim 3, characterized in that: The switch assembly (400) comprises a switch box (401) arranged in the second installation groove (207), the switch box (401) having an installation cavity (402), a plurality of arranged installation holes (403) on the top of the switch box (401), a sliding button (404) being slidably arranged in the installation hole (403), an end of the main cable (301) and the branch cable (205) being arranged in the installation cavity (402), and a first conductive sheet (3011) being arranged at the end of the main cable (301), a supporting platform (103) for fixing the first conductive sheet (3011) being arranged in the installation cavity (402), a plurality of conductive elastic members (405) being arranged on the first conductive sheet (3011), and the conductive elastic members (405) being used for In order to provide a force for the sliding button (404) to move away from the first conductive sheet (3011), the conductive elastic member (405) and the mounting hole (403) are arranged in a one-to-one correspondence, the side wall of the switch box (401) has a plurality of through holes (406) arranged in a one-to-one correspondence with the mounting holes (403), the through holes (406) are used to pass the branch cable (205), one end of the branch cable (205) used to communicate with the main cable (301) is provided with a second conductive sheet (2051), the second conductive sheet (2051) is provided on the sliding button (404), the bottom of the sliding button (404) is made of conductive material, and after the sliding button (404) and the conductive elastic member (405) are in contact, the branch cable (205) and the main cable (301) are electrically connected.

5. A multi-tap automatic retractable test reel device according to claim 4, characterized in that: The switch assembly (400) further comprises a plurality of slide cylinders (407) arranged on the switch box (401) and located in the installation cavity (402), the plurality of slide cylinders (407) and the installation holes (403) being arranged in one-to-one correspondence, the bottom of the slide cylinder (407) having a plurality of first teeth (408), and an avoidance groove (409) being arranged between two of the first teeth (408), the side of the slide button (404) away from the installation hole (403) having a plurality of second teeth (410), and the slide cylinder (407) having a spiral slide The sliding button (404) has a protrusion (412), and the sliding button (404) is slidably and rotatably arranged in the sliding cylinder (407). After the sliding button (404) slides in the sliding cylinder (407), the first tooth (408) and the second tooth (410) are meshed or the first tooth (408) slides into the avoidance groove (409). After the first tooth (408) and the second tooth (410) are meshed, the bottom of the sliding button (404) abuts against the conductive elastic member (405).

6. The multi-tap automatic retractable test reel device according to claim 1, characterized in that: It also includes an end cover (104), and the end cover (104) is used to cover the chassis (100).

7. A multi-tap automatic retractable test reel device according to claim 6, characterized in that: The first winding assembly (200) further comprises a mounting member (208) arranged on the first mounting plate (201), the mounting member (208) having a guide groove (209), a guide rod (210) being arranged in the guide groove (209), the guide rod (210) having a forward thread groove (211) and a reverse thread groove (212) arranged crosswise with each other, a guide wheel (213) being rotatably arranged on the guide rod (210), the guide wheel (213) having a clamping portion (214), the branch cable (205) The guide wheel (213) is used to be arranged on the clamping portion (214); after the branch cable (205) moves around the first cable reel (203), the guide wheel (213) is driven to rotate on the guide rod (210); the guide wheel (213) has a protrusion (412); the protrusion (412) is slidably arranged in the forward thread groove (211) and the reverse thread groove (212); after the guide wheel (213) rotates on the guide rod (210), the guide wheel (213) reciprocates on the guide rod (210).

8. The multi-tap automatic retractable test reel device according to claim 7, characterized in that: The end cover (104) has a plurality of through slots (105) arranged in an array, the through slots (105) being used to avoid the branch cable (205) located on the clamping portion (214), and a clamping ball (215) is provided on a side of the branch cable (205) close to the first contact (206), the diameter of the clamping ball (215) being greater than the width of the through slot (105).

Images