CN212402957U - Automatic counting cable taking equipment - Google Patents

Automatic counting cable taking equipment Download PDF

Info

Publication number
CN212402957U
CN212402957U CN202020774523.2U CN202020774523U CN212402957U CN 212402957 U CN212402957 U CN 212402957U CN 202020774523 U CN202020774523 U CN 202020774523U CN 212402957 U CN212402957 U CN 212402957U
Authority
CN
China
Prior art keywords
shaft
connecting rod
winding
end part
belt pulley
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202020774523.2U
Other languages
Chinese (zh)
Inventor
朱颖
陈少勇
袁彤
李憬
范瑶
丁文婷
唐军
彭娟娟
余倩
杨帆
任鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xianning Power Supply Co of State Grid Hubei Electric Power Co Ltd
Original Assignee
Xianning Power Supply Co of State Grid Hubei Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xianning Power Supply Co of State Grid Hubei Electric Power Co Ltd filed Critical Xianning Power Supply Co of State Grid Hubei Electric Power Co Ltd
Priority to CN202020774523.2U priority Critical patent/CN212402957U/en
Application granted granted Critical
Publication of CN212402957U publication Critical patent/CN212402957U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

The utility model belongs to the technical field of electric power. The automatic counting cable taking device is characterized by comprising a winding rack, a winding roll, a mechanical wheel type distance measuring device, an automatic winding mechanism, a control circuit and a display; the winding roll is arranged on the winding rack, and the left end part of the shaft of the winding roll is connected with the coupling of the automatic winding mechanism; the display is connected with the display output port of the control circuit; the automatic winding mechanism comprises a motor, a driving belt pulley, a belt, a driven belt pulley shaft and a coupling; the mechanical wheel type distance metering equipment comprises wheels, a counting sensor, a front pressing wheel and a rear pressing wheel. The device is mainly used for distributing cables on the site of a warehouse. The safety risk that needs closely be close to off-ground drum operation when can effectively avoiding artifical unwrapping wire, also can avoid getting the inconsistent problem of warehouse account card thing that line quantity had the error to cause when artifical unwrapping wire. Meanwhile, the device can be used for measuring whether a supplier delivers goods according to quantity when receiving goods and checking whether the cable has a code hopping phenomenon.

Description

Automatic counting cable taking equipment
Technical Field
The utility model belongs to the technical field of electric power, concretely relates to automatic cable equipment is got in count.
Background
At present, cables are distributed on a warehouse site, and need to be close to an off-ground wire coil for operation in a close distance during manual paying-off, so that safety risks exist; the problem of inconsistent warehouse account card objects caused by errors in the line taking quantity is solved.
Disclosure of Invention
An object of the utility model is to provide an automatic cable equipment is got in count, this equipment security is good, get line quantity degree of accuracy height.
In order to realize the utility model discloses a purpose, the utility model discloses the technical scheme who takes is: the automatic counting cable taking device is characterized by comprising a winding rack, a winding roll, a mechanical wheel type distance measuring device, an automatic winding mechanism, a control circuit and a display; the winding roll is arranged on the winding rack, and the left end part of the shaft of the winding roll is connected with the coupling of the automatic winding mechanism; the display is connected with the display output port of the control circuit;
the automatic winding mechanism comprises a motor, a driving belt pulley, a belt, a driven belt pulley shaft and a coupler, wherein the driven belt pulley is fixed at the left end part of the driven belt pulley shaft, the right part of the driven belt pulley shaft is arranged in a bearing installation groove of a left support of the winding rack through a bearing and a bearing seat, and the right end part of the driven belt pulley shaft is connected with the left end part of the coupler; a driving belt pulley is arranged on an output shaft of the motor, and the driving belt pulley is connected with a driven belt pulley through a belt; the power line of the motor is connected with the power control end of the control circuit;
the mechanical wheel type distance metering equipment comprises wheels, a counting sensor, a front pressing wheel and a rear pressing wheel, wherein the wheels are fixed on a rod through bearings, the upper end part of the rod is fixedly connected with a front upper connecting rod of a coiling rack, the lower end part of the rod is fixedly connected with a front lower connecting rod of the coiling rack, the wheels are positioned at a hole between the front lower connecting rod and the front upper connecting rod, scales are arranged on the upper surface of the wheels along the circumference, the counting sensor is fixed on the front upper connecting rod of the coiling rack and positioned above the wheels, and the counting sensor faces the edge part of the upper surface of the wheels; the outer side surface of each wheel is provided with an annular arc-shaped groove, a cable passes through a hole between the front lower connecting rod and the front upper connecting rod and is wound on a winding frame of a winding roll from the arc-shaped groove, the front pressing wheel and the rear pressing wheel are positioned on the right side of the cable passing line, the front pressing wheel is positioned on the front side of the rear pressing wheel, the front pressing wheel is installed on the front side surface of the front upper connecting rod, and the rear pressing wheel is installed on the rear side surface of the front upper connecting rod; the counting sensor is connected with the signal input end of the control circuit through a data line.
The winding machine frame comprises a left support, a right support, a front lower connecting rod, a front upper connecting rod and a rear connecting rod, wherein the front side of the left support and the front side of the right support are fixedly connected through the front lower connecting rod and the front upper connecting rod respectively; the winding roll comprises a left blocking roll, a right blocking roll, a winding stand and a shaft, wherein the winding stand is fixed on the shaft, the left blocking roll is positioned on the left side of the right blocking roll, the winding stand is positioned between the left blocking roll and the right blocking roll, the left end part of the shaft penetrates through a shaft hole in the middle of the left blocking roll and then is connected with a coupler of the automatic winding mechanism, and the right end part of the shaft penetrates through the shaft hole in the middle of the right blocking roll and then is placed on a shaft placing groove of the right bracket; the winding frame consists of 4-12U-shaped telescopic frames.
A key block is fixed at the left end of the shaft, a key block groove is formed in a shaft hole in the middle of the left baffle disc, a key block groove is formed in a connecting hole of a coupler of the automatic winding mechanism, and the key block at the left end of the shaft penetrates into the key block grooves on the left baffle disc and the coupler; the right end part of the shaft is fixed with a key block, a key block groove is arranged in the shaft hole of the right baffle disc, and the key block at the right end part of the shaft penetrates into the key block groove.
Furthermore, a storage battery is arranged on the winding frame, the storage battery is connected with the power input end of the control circuit through a power line, and a change-over switch is arranged on the power line.
The utility model has the advantages that: the device has good safety and high accuracy of the number of the taken lines.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the spool stand of the present invention.
Reference numbers in the figures: 1-wheel, 2-hole, 3-left support, 4-front lower connecting rod, 5-front upper connecting rod, 6-motor, 7-belt, 8-control board, 9-left baffle disc, 10-right baffle disc, 11-counting sensor, 12-front press wheel, 13-cable, 14-ground wire coil, 15-lifting rope, 16-universal wheel, 17-shaft, 18-U-shaped telescopic frame and 19-key block.
Detailed Description
As shown in fig. 1-2, the automatic counting cable-taking device includes a winding frame, a winding roll, a mechanical wheel type distance measuring device, an automatic winding mechanism, a control circuit, and a display; the winding roll is arranged on the winding rack, and the left end part of a shaft 17 of the winding roll is connected with a coupling of the automatic winding mechanism; the display is connected with the display output port of the control circuit (the length of the cable of the display is stored and released);
the automatic winding mechanism (or called automatic winding driving mechanism) comprises a motor 6, a driving belt pulley, a belt 7, a driven belt pulley shaft and a coupling, wherein the motor 6 is fixed at the bottom of a winding rack (not shown in figure 1, the motor 6 can also be fixed on a base), the driven belt pulley is fixed at the left end part of the driven belt pulley shaft, the right part of the driven belt pulley shaft is arranged in a bearing installation groove of a left support 3 of the winding rack through a bearing and a bearing seat (namely, the driven belt pulley shaft can rotate), and the right end part of the driven belt pulley shaft is connected with the left end part of the coupling; a driving belt pulley is arranged on an output shaft of the motor 6, and the driving belt pulley is connected with a driven belt pulley through a belt 7; a power line of the motor 6 is connected with a power control end of the control circuit (the control circuit controls the work of the motor 6, the motor rotates, the driven belt pulley shaft is driven to rotate through a belt, and the shaft 17 is driven to rotate through a coupler, so that the wire coiling disc is driven to rotate to coil a cable);
the power line of the motor 6 can also be connected with a commercial power supply, a control switch is arranged on the power line, and the control switch is connected with the control end of the control circuit (the control switch controls the on or off of the power supply);
the mechanical wheel type distance measuring equipment (or called wheel type distance measuring instrument) is arranged at the lower part of the front side of the coiling rack; the mechanical wheel type distance measuring device (or called wheel type distance measuring instrument) comprises a wheel 1, a counting sensor 11, a front pressing wheel 12 and a rear pressing wheel, wherein the wheel 1 is fixed on a rod by a bearing (namely the wheel 1 can rotate), the upper end part of the rod is fixedly connected with a front upper connecting rod 5 of a coiling rack, the lower end part of the rod is fixedly connected with a front lower connecting rod 4 of the coiling rack, the wheel 1 is positioned at a hole 2 between the front lower connecting rod 4 and the front upper connecting rod 5 (namely the wheel 1 can rotate), the upper surface of the wheel 1 is circumferentially provided with scales (uniformly distributed with scales such as 360 degrees), the counting sensor 11 is fixed on the front upper connecting rod 5 of the coiling rack and positioned above the wheel 1, the counting sensor 11 faces to the edge part of the upper surface of the wheel 1 (the edge part of the upper surface is provided with scales, the counting sensor 11 measures the number of the, when the radius of the wheel 1 is a fixed number, the rotating circumference can be known, the linear motion of the cable drives the wheel 1 to do circular motion, the rotating circumference of the wheel 1 is the length of the cable, and therefore the length of the cable to be wound and unwound is measured and displayed by a display; when the required length is reached, stopping the motor to work, cutting off the cable, and finishing the cable taking work); the outer side surface of the wheel 1 is provided with an annular arc-shaped groove, a cable 13 penetrates through a hole 2 between the front lower connecting rod 4 and the front upper connecting rod 5 and is wound on a winding frame of a winding roll through the arc-shaped groove, the front pinch roller 12 and the rear pinch roller are both positioned on the right side of the cable passing line (the right side of the wheel 1 is provided with the front pinch roller 12 and the rear pinch roller, the front pinch roller 12 and the rear pinch roller play the roles of the pinch roller and the guide wheel, the cable 13 is pressed into the arc-shaped groove on the outer side surface of the wheel 1, the cable 13 is always contacted with the wheel 1, the cable 13 moves to drive the wheel 1 to rotate), the front pinch roller 12 is positioned on the front side of the rear pinch roller, the front pinch roller 12 is installed on the front side surface of the front upper connecting rod; the counting sensor 11 is connected with the signal input end of the control circuit by a data line.
The winding machine frame comprises a left support 3, a right support, a front lower connecting rod 4, a front upper connecting rod 5 and a rear connecting rod, wherein the front side of the left support 3 is fixedly connected (such as welded or bolted) with the front side of the right support through the front lower connecting rod 4 and the front upper connecting rod 5 respectively, the rear side of the left support 3 is fixedly connected (such as welded or bolted) with the rear side of the right support through the rear connecting rod, the front lower connecting rod 4 is positioned below the front upper connecting rod 5, a hole 2 is reserved between the front lower connecting rod 4 and the front upper connecting rod 5, the upper end part of the left support 3 is provided with a bearing mounting groove (hole), and the upper end part of the right support is provided with a shaft placing groove (hole); the winding roll comprises a left baffle disc 9, a right baffle disc 10, a winding frame and a shaft 17, wherein the winding frame is fixed on the shaft 17 (for example, welded), the left baffle disc 9 is positioned at the left side of the right baffle disc 10, the winding frame is positioned between the left baffle disc 9 and the right baffle disc 10, the left end part of the shaft 17 passes through the shaft hole at the middle part of the left baffle disc 9 and then is connected with a coupling of the automatic winding mechanism (for example, the right end part of the shaft 17 is connected with the right end part of the coupling in an inserting way), the right end part of the shaft 17 passes through the shaft hole at the middle part of the right baffle disc 10 and then is placed on a shaft placing groove of a right bracket (the shaft 17 can rotate; the shaft 17 can also be adopted, the shaft 17 can slightly move left and right, so that the left end part of the shaft 17 is inserted into or separated from a connecting hole of the coupling, namely, the winding disc can be placed on or taken off from the winding frame, the right, the shaft 17 cannot move left and right when the movable left and right limiting mechanisms are closed, and the movable left and right limiting mechanisms are such as bolts); the reel consists of 4-12U-shaped telescopic frames 18 (the U-shaped telescopic frames 18 can be used for placing and taking down cables when being contracted).
A key block 19 is fixed at the left end of the shaft 17, a key block groove is arranged in a shaft hole in the middle of the left baffle disc 9, a key block groove is arranged in a connecting hole of a coupler of the automatic winding mechanism, and the key block 19 at the left end of the shaft 17 penetrates into the left baffle disc 9 and the key block groove on the coupler (the left baffle disc 9 can rotate along with the shaft 17); a key block is fixed at the right end of the shaft 17, a key block groove is arranged in the shaft hole of the right baffle disc 10, and the key block at the right end of the shaft 17 penetrates into the key block groove (the right baffle disc 10 can rotate along with the shaft 17).
The control circuit and the display are installed on the control panel, the control panel is installed on the left side face of the left support 3 of the winding rack, and the control switch is installed on the control panel.
Furthermore, a storage battery is arranged on the winding frame, the storage battery is connected with the power input end of the control circuit through a power line (under the condition that no commercial power exists, the automatic counting cable taking device can work), and a change-over switch is arranged on the power line.
The power part of the automatic wire winding mechanism adopts two modes of preset power-off and simple counting, when the mode is the maximum mode of the preset power-off, the number of cables to be obtained can be set, mechanical wheel type distance metering equipment (or wheel type distance measuring instrument) transmits the measured number to a control circuit, and when the preset number is reached, the control mechanism automatically powers off to complete a preset wire taking plan. And when the counting mode is pure, the control mechanism is not powered off until all cables are taken out, and the distance measurement quantity is displayed on the display screen in real time.
The winding roll is removable. The spool stand of the spool is made of light, firm and durable aluminum alloy, and the spool can be detached. The winding frame is composed of six U-shaped telescopic frames (telescopic frames) 18, after the wire taking work is completed, the winding frame is taken down, the U-shaped telescopic frames retract, and the cable is conveniently taken down from the winding frame.
The device is mainly used for distributing cables on the site of a warehouse. The safety risk that needs closely be close to off-ground drum operation when can effectively avoiding artifical unwrapping wire, also can avoid getting the inconsistent problem of warehouse account card thing that line quantity had the error to cause when artifical unwrapping wire. Meanwhile, the device can be used for measuring whether a supplier delivers goods according to quantity when receiving goods and checking whether the cable has a code hopping phenomenon.
The working process is as follows:
1. the off-ground wire coil 14 in the warehouse is hung on a universal wheel 16 by a lifting rope 15, the universal wheel 16 is installed on an inner beam of the warehouse, namely, the off-ground wire coil 14 wound with cables can freely rotate (or the off-ground wire coil 14 is installed on a free rotating frame); paying off: the outer end of the cable is manually pulled out to walk, the cable 13 is pressed into the arc-shaped groove on the outer side surface of the wheel 1, and the front pinch roller 12 and the rear pinch roller press the cable 13 into the arc-shaped groove on the outer side surface of the wheel 1; then fixing the outer end of the cable on a winding frame;
2, starting a motor, rotating a spool stand and moving a cable, wherein the cable moves linearly to drive a wheel 1 to do circular motion, a counting sensor 11 transmits the rotating data of the wheel 1 to a control circuit (the control circuit adopts the prior conventional technology), and the rotating perimeter of the wheel 1 is the length of the cable, so that the length of the cable to be wound and unwound is measured and displayed by a display; and when the required length is reached, stopping the motor to work, cutting off the cable, and finishing the cable taking work.

Claims (4)

1. The automatic counting cable taking device is characterized by comprising a winding rack, a winding roll, a mechanical wheel type distance measuring device, an automatic winding mechanism, a control circuit and a display; the winding roll is arranged on the winding rack, and the left end part of a shaft (17) of the winding roll is connected with a coupling of the automatic winding mechanism; the display is connected with the display output port of the control circuit;
the automatic winding mechanism comprises a motor (6), a driving belt pulley, a belt (7), a driven belt pulley shaft and a coupler, wherein the driven belt pulley is fixed at the left end part of the driven belt pulley shaft, the right part of the driven belt pulley shaft is arranged in a bearing installation groove of a left support (3) of the winding rack through a bearing and a bearing seat, and the right end part of the driven belt pulley shaft is connected with the left end part of the coupler; a driving belt pulley is arranged on an output shaft of the motor (6), and the driving belt pulley is connected with a driven belt pulley through a belt (7); the power line of the motor (6) is connected with the power control end of the control circuit;
the mechanical wheel type distance metering equipment comprises wheels (1), a counting sensor (11), a front pressing wheel (12) and a rear pressing wheel, wherein the wheels (1) are fixed on a rod through bearings, the upper end part of the rod is fixedly connected with a front upper connecting rod (5) of a coiling rack, the lower end part of the rod is fixedly connected with a front lower connecting rod (4) of the coiling rack, the wheels (1) are positioned in a hole (2) between the front lower connecting rod (4) and the front upper connecting rod (5), scales are arranged on the upper surface of the wheels (1) along the circumference, the counting sensor (11) is fixed on the front upper connecting rod (5) of the coiling rack and positioned above the wheels (1), and the counting sensor (11) faces to the edge part of the upper surface of the wheels (1); the outer side surface of each wheel (1) is provided with an annular arc-shaped groove, a cable (13) penetrates through a hole (2) between a front lower connecting rod (4) and a front upper connecting rod (5) and is wound on a winding frame of a winding roll from the arc-shaped groove, a front pressing wheel (12) and a rear pressing wheel are both positioned on the right side of the cable passing line, the front pressing wheel (12) is positioned on the front side of the rear pressing wheel, the front pressing wheel (12) is installed on the front side surface of the front upper connecting rod (5), and the rear pressing wheel is installed on the rear side surface of the front upper connecting rod (5); the counting sensor (11) is connected with the signal input end of the control circuit through a data line.
2. The automatic counting cable take-off apparatus according to claim 1, wherein: the winding machine frame comprises a left support (3), a right support, a front lower connecting rod (4), a front upper connecting rod (5) and a rear connecting rod, wherein the front side of the left support (3) and the front side of the right support are respectively fixedly connected by the front lower connecting rod (4) and the front upper connecting rod (5), the rear side of the left support (3) and the rear side of the right support are fixedly connected by the rear connecting rod, the front lower connecting rod (4) is positioned below the front upper connecting rod (5), a hole (2) is reserved between the front lower connecting rod (4) and the front upper connecting rod (5), the upper end part of the left support (3) is provided with a bearing mounting groove, and the upper end part of the right support is provided with a shaft placing groove; the winding roll comprises a left baffle disc (9), a right baffle disc (10), a winding stand and a shaft (17), the winding stand is fixed on the shaft (17), the left baffle disc (9) is positioned on the left side of the right baffle disc (10), the winding stand is positioned between the left baffle disc (9) and the right baffle disc (10), the left end part of the shaft (17) penetrates through a shaft hole in the middle of the left baffle disc (9) and then is connected with a coupler of the automatic winding mechanism, and the right end part of the shaft (17) penetrates through the shaft hole in the middle of the right baffle disc (10) and then is placed on a shaft placing groove of the right bracket; the winding frame consists of 4-12U-shaped telescopic frames (18).
3. The automatic counting cable take-off apparatus according to claim 2, wherein: a key block (19) is fixed at the left end of the shaft (17), a key block groove is formed in a shaft hole in the middle of the left baffle disc (9), a key block groove is formed in a connecting hole of a coupler of the automatic winding mechanism, and the key block (19) at the left end of the shaft (17) penetrates into the left baffle disc (9) and the key block groove in the coupler; the right end part of the shaft (17) is fixed with a key block, a key block groove is arranged in the shaft hole of the right baffle disc (10), and the key block at the right end part of the shaft (17) penetrates into the key block groove.
4. The automatic counting cable take-off apparatus according to claim 1, wherein: the storage battery is arranged on the winding frame and is connected with the power input end of the control circuit through a power line, and a change-over switch is arranged on the power line.
CN202020774523.2U 2020-05-11 2020-05-11 Automatic counting cable taking equipment Active CN212402957U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020774523.2U CN212402957U (en) 2020-05-11 2020-05-11 Automatic counting cable taking equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020774523.2U CN212402957U (en) 2020-05-11 2020-05-11 Automatic counting cable taking equipment

Publications (1)

Publication Number Publication Date
CN212402957U true CN212402957U (en) 2021-01-26

Family

ID=74376380

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020774523.2U Active CN212402957U (en) 2020-05-11 2020-05-11 Automatic counting cable taking equipment

Country Status (1)

Country Link
CN (1) CN212402957U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112886447A (en) * 2021-02-24 2021-06-01 国网湖北省电力有限公司咸宁供电公司 Secondary construction vehicle for transformer substation
CN114212612A (en) * 2021-10-29 2022-03-22 国网辽宁省电力有限公司丹东供电公司 Automatic take-up and pay-off equipment for electric power cables

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112886447A (en) * 2021-02-24 2021-06-01 国网湖北省电力有限公司咸宁供电公司 Secondary construction vehicle for transformer substation
CN112886447B (en) * 2021-02-24 2024-05-28 国网湖北省电力有限公司咸宁供电公司 Secondary construction vehicle for transformer substation
CN114212612A (en) * 2021-10-29 2022-03-22 国网辽宁省电力有限公司丹东供电公司 Automatic take-up and pay-off equipment for electric power cables
CN114212612B (en) * 2021-10-29 2023-07-14 国网辽宁省电力有限公司丹东供电公司 Automatic power cable winding and unwinding equipment

Similar Documents

Publication Publication Date Title
CN212402957U (en) Automatic counting cable taking equipment
CN103389058B (en) The rolling length automatic metering system of the stacked rolling thing of a kind of hoist and method
CN116519082B (en) Portable water level gauge
CN218403129U (en) Automatic wire drawing counting cutting and winding machine
JP2542616B2 (en) Method and device for storing coil of wound strip material and supplying it to a machine for processing the material
CN212542181U (en) Winding machine of full-automatic wire winding and unwinding
CN218934401U (en) Automatic change deep hole inclinometry collection system
CN201313769Y (en) Optical cable picking and laying machine
CN111453545A (en) Method for distributing cables on site in warehouse
CN113023470B (en) Take-up device and cable rewinder
CN111606149A (en) Electric power construction paying out machine constructs
CN214407406U (en) Material and integrative equipment of detection are sent out to electric power cable warehouse
CN110609370B (en) Method for manufacturing optical cable
CN114152169B (en) Wire meter rice device with receive and releases line function
CN217263840U (en) Automatic recovery unit of cable
CN115448096A (en) Intelligent cable winch device
CN112660928B (en) Electric cable pay-off device
CN201850002U (en) Automatic specified-length winding equipment for steel wire rope
CN114852790A (en) Device for keeping continuous automatic paying-off and preventing wire torsion during wire rod reel changing
CN112880611A (en) Material and integrative equipment of detection are sent out to electric power cable warehouse
CN113682877A (en) Automatic paying-off counting device for photovoltaic group string cables
CN112478936A (en) Cable take-up device for electric power engineering construction
CN207957394U (en) A kind of rope capacity metering coiling device
CN219135979U (en) Winding frame for wire processing
CN219751553U (en) Device for automatically calculating length of tethered cable

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant