CN115524651A - Electric power metering instrument testing device and working method thereof - Google Patents
Electric power metering instrument testing device and working method thereof Download PDFInfo
- Publication number
- CN115524651A CN115524651A CN202210866489.5A CN202210866489A CN115524651A CN 115524651 A CN115524651 A CN 115524651A CN 202210866489 A CN202210866489 A CN 202210866489A CN 115524651 A CN115524651 A CN 115524651A
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- transmission line
- workbench
- rotating shaft
- shaft
- electric power
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/04—Cleaning by suction, with or without auxiliary action
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- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a testing device of an electric power metering instrument and a working method thereof, wherein the testing device comprises the following steps: the device comprises a workbench, a cleaning assembly and a limiting assembly; the cleaning assembly comprises collecting mechanisms arranged at two ends of the workbench and a dust collecting mechanism connected with the collecting mechanisms; the limiting assembly comprises a mounting frame connected with the workbench and a movable clamping mechanism arranged in the mounting frame; the movable clamping mechanism comprises a rotating shaft and an adjusting shaft, and a transmission line penetrates between the rotating shaft and the adjusting shaft; the rotating shaft is provided with a latch, end shafts at two ends of the adjusting shaft are embedded in the inner wall of the mounting frame, the inner wall of the mounting frame is provided with a side groove for the end shafts to be clamped and to move up and down, and a spring which is abutted against the end shafts is arranged in the side groove; the end shaft and the adjusting shaft are driven to move through the extension and retraction of the spring so as to adjust the distance between the adjusting shaft and the rotating shaft, and meanwhile, the clamping teeth extrude the transmission line to complete the limiting and adjusting of the length and the position of the transmission line. The problem of current wired mouse's transmission line length can't be spacing, and the workstation surface dust does not have unified clearance collection is solved.
Description
Technical Field
The invention relates to the technical field of electric power metering instrument testing, in particular to an electric power metering instrument testing device and a working method thereof.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The electric power metering instrument is used as an advanced intelligent and digital electric network front-end acquisition element, is widely applied to various control systems, SCADA systems, energy management systems and other equipment, has the characteristics of convenience in installation, simplicity in wiring, small engineering quantity and the like, can be detected by a special testing device in order to ensure the stability and the qualification rate of the electric power metering instrument in use, can be put into use after qualification, and can also be applied to the maintenance of the electric power metering instrument.
When the existing testing device is used, the wired mouse has stronger anti-interference performance and stable transmission performance compared with a wireless mouse, so that the wired mouse is widely applied to the testing device, and specific control operation needs to be realized through the wired mouse in actual use;
the connecting wires of the wired mouse are long and scattered, so that the phenomena that the long transmission wires are knotted and wound to influence the use are easily caused; when the mouse falls off, the transmission line is arranged under the mouse and generates collision; meanwhile, the workbench is not provided with a special cleaning mechanism, and dust cannot be cleaned, so that the workbench has great limitation in practical use.
Disclosure of Invention
In order to solve the problems, the invention provides a testing device for an electric power metering instrument and a working method thereof, and solves the problems that the length of a transmission line of the conventional wired mouse cannot be limited, and dust on the surface of a workbench cannot be uniformly cleaned and collected.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides an electric power meter testing apparatus, including: the cleaning assembly and the limiting assembly are arranged on the workbench;
the cleaning assembly comprises collecting mechanisms arranged at two ends of the workbench and a dust suction mechanism connected with the collecting mechanisms;
the limiting assembly comprises a mounting frame connected with the workbench and a movable clamping mechanism arranged in the mounting frame; the movable clamping mechanism comprises a rotating shaft and an adjusting shaft, and a transmission line penetrates between the rotating shaft and the adjusting shaft;
the rotating shaft is provided with a latch, end shafts at two ends of the adjusting shaft are embedded in the inner wall of the mounting frame, the inner wall of the mounting frame is provided with a side groove for the end shafts to be clamped and to move up and down, and a spring which is abutted against the end shafts is arranged in the side groove; the end shaft and the adjusting shaft are driven to move through the extension and retraction of the spring so as to adjust the distance between the adjusting shaft and the rotating shaft, and meanwhile, the clamping teeth extrude the transmission line to complete the limiting and adjusting of the length and the position of the transmission line.
As an alternative embodiment, the clamping teeth are arranged on the surface of the rotating shaft at equal angles, and the transmission lines abut against the clamping teeth.
As an alternative implementation mode, the rotating shaft at one end of the rotating shaft is movably penetrated through the side edge of the mounting frame.
In an alternative embodiment, the mounting frame is composed of four separate plate-shaped bodies, every two adjacent plate-shaped bodies are connected through a bolt, and the plate-shaped body forming the top of the mounting frame is connected with the workbench through a bolt.
As an alternative embodiment, the collecting mechanism comprises collecting frames symmetrically arranged at the edges of two ends of the top of the workbench, and an air pipe connected with the outer side surface of the collecting frame, and the air pipe is connected with the feeding end of the dust suction mechanism.
As an alternative embodiment, the dust suction mechanism comprises a collection box, a filter plate is arranged in the collection box to divide the collection box into two chambers through the filter plate, one chamber is connected with an air pipe, and an exhaust fan is arranged in the other chamber.
As an alternative embodiment, the suction fan generates negative pressure, the negative pressure is generated in the collecting frame through the air pipe, impurities on the workbench are sucked into one of the chambers from the air pipe under the action of the negative pressure, the impurities are blocked through the filter plate, and air generated by the suction fan is discharged from the through hole.
As an alternative embodiment, the end face of the collecting box, which faces the air outlet end of the exhaust fan, is provided with a through hole.
As an alternative embodiment, a bracket is arranged on the bottom end face of the workbench, and the collecting box is installed on the bracket.
As an alternative embodiment, the longitudinal section of the collecting frame is in an L-shaped structure, and the outer end faces of two ends of the collecting frame and the front and rear surfaces of the workbench are positioned on the same plane.
As an alternative embodiment, the bottom of the workbench is provided with a drawer for placing the detection tool.
As an alternative embodiment, a detection table for testing the electric power metering instrument is arranged on the top end face of the workbench, and an operation button and a connecting hole are arranged on the top of the detection table.
As an alternative embodiment, one side of the bottom of the workbench is provided with a protective plate.
In a second aspect, the present invention provides a method for operating a testing apparatus of an electric power metering device, where the testing apparatus of the electric power metering device according to the first aspect is adopted, and the method includes:
the distance between the adjusting shaft and the rotating shaft is increased by downwards shifting the adjusting shaft, so that the transmission line penetrates through the adjusting shaft and the rotating shaft;
the end shaft and the adjusting shaft are driven to move towards the direction of the rotating shaft through the extension of the spring, and the clamping teeth extrude the transmission line to complete the limit of the transmission line, so that the length of the transmission line reserved on the workbench is fixed;
when the length of the transmission line is adjusted, the transmission line is pulled, so that the transmission line drives the end shaft and the adjusting shaft to move downwards, the spring is extruded, and the distance between the adjusting shaft and the rotating shaft is increased;
after the length of the transmission line is adjusted, the transmission line is released to be pulled, and the clamping teeth are enabled to complete extrusion on the transmission line through resilience of the spring;
after the measurement is finished, the exhaust fan is started, the exhaust fan generates negative pressure, the negative pressure is generated in the collection frame through the air pipe, impurities on the workbench are sucked into one cavity from the air pipe under the action of the negative pressure, the impurities are blocked through the filter plate, and air generated by the exhaust fan is discharged from the through hole.
Compared with the prior art, the invention has the beneficial effects that:
according to the electric power metering instrument testing device and the working method thereof, the length of the transmission line is limited and adjusted through the limiting assembly, the knotting and winding phenomena caused by the fact that the length of the transmission line is long are avoided, meanwhile, the position of the mouse is limited, the mouse is prevented from falling off a workbench, and the whole function is very flexible.
According to the electric power metering instrument testing device and the working method thereof, provided by the invention, impurities on the workbench are conveniently and quickly adsorbed and collected through the cleaning assembly, the operation is convenient, dust is prevented from falling to the outside, and the cleanness degree of the workbench is not influenced.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic structural diagram of a testing apparatus of an electric power metering device according to embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view of a stop assembly provided in accordance with embodiment 1 of the present invention;
FIG. 3 is a sectional view of an end portion of a collecting frame according to embodiment 1 of the present invention;
FIG. 4 is a sectional view of a collecting box according to embodiment 1 of the present invention;
wherein: 1. a detection table; 2. a transmission line; 3. a work table; 4. a protection plate; 5. a collection box; 6. an air tube; 7. a drawer; 8. a collection frame; 9. clamping teeth; 10. a rotating shaft; 11. a rotating shaft; 12. an adjustment shaft; 13. a spring; 14. installing a frame; 15. a side groove; 16. an end shaft; 17. a filter plate; 18. an exhaust fan.
Detailed Description
The invention is further explained by the following embodiments in conjunction with the drawings.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and it should be understood that the terms "comprises" and "comprising", and any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiments and features of the embodiments of the invention may be combined with each other without conflict.
Example 1
As shown in fig. 1, the present embodiment provides an electric power meter testing apparatus, including: the cleaning device comprises a workbench 3, a cleaning assembly and a limiting assembly, wherein the cleaning assembly and the limiting assembly are arranged on the workbench 3;
the cleaning assembly comprises collecting mechanisms arranged at two ends of the workbench 3 and a dust collecting mechanism connected with the collecting mechanisms;
the limiting assembly comprises a mounting frame 14 connected with the workbench 3 and a movable clamping mechanism arranged in the mounting frame 14; the clamping and stopping mechanism comprises a rotating shaft 10 and an adjusting shaft 12, and a transmission line 2 penetrates between the rotating shaft 10 and the adjusting shaft 12;
the rotating shaft 10 is provided with a latch 9, end shafts 16 at two ends of the adjusting shaft 12 are embedded in the inner wall of the mounting frame 14, a side groove 15 for the end shafts 16 to be clamped and to move up and down is formed in the inner wall of the mounting frame 14, and a spring 13 abutting against the end shafts 16 is arranged in the side groove 15; the end shaft 16 and the adjusting shaft 12 are driven to move by the extension of the spring 13 so as to adjust the distance between the adjusting shaft 12 and the rotating shaft 10, and the clamping teeth 9 extrude the transmission line 2 to complete the limit and adjustment of the length and the position of the transmission line.
In the embodiment, a drawer 7 is arranged at the bottom of the workbench 3, and the drawer 7 is used for placing a detection tool;
a mouse is placed at the top of the workbench 3, a transmission line 2 for signal transmission is arranged on the mouse, and the anti-interference capability of the wired mouse is stronger than that of a wireless mouse, so that the wired mouse has a wider application range in large-scale equipment;
a limiting assembly is arranged at the bottom of the rear surface of the workbench 3, and the transmission line 2 is arranged on the inner side of the limiting assembly and used for limiting and adjusting the length and the position of the transmission line 2;
a cleaning component is also arranged at the bottom of the workbench 3.
In this embodiment, as shown in fig. 2, the limiting component includes a mounting frame 14 connected to the worktable 3, and a movable locking mechanism disposed inside the mounting frame 14; carry out spacing and regulation through spacing subassembly to the length of transmission line 2, avoid because of 2 long and production of transmission line knot, winding phenomenon, also can carry on spacingly to the position of mouse simultaneously, avoid mouse to drop from the workstation, whole function is very nimble.
As an alternative embodiment, the movable locking mechanism comprises a rotating shaft 10 and an adjusting shaft 12;
the surface of the rotating shaft 10 is fixed with the latch 9 at an equal angle, the transmission line 2 is positioned between the rotating shaft 10 and the adjusting shaft 12, and the transmission line 2 is abutted against the latch 9;
a rotating shaft 11 is formed at one end of the rotating shaft 10, and the rotating shaft 11 is movably penetrated through the side edge of the mounting frame 14;
the end shafts 16 at the two ends of the adjusting shaft 12 are embedded in the inner wall of the mounting frame 14, and the inner wall of the mounting frame 14 is provided with a side groove 15 for the end shafts 16 to be clamped and to move up and down, so that the length of the transmission line 2 can be adjusted conveniently at the later stage, and the clamping is avoided;
the spring 13 is placed inside the side groove 15, and the spring 13 abuts against the end shaft 16.
As an alternative embodiment, the mounting frame 14 is formed by four separate plate-shaped bodies, so as to realize the normal mounting of the spring 13; and every two adjacent plate-shaped bodies are fixedly connected through bolts, and the plate-shaped bodies forming the top of the mounting frame 14 and the workbench 3 are fixed through bolts.
In this embodiment, the clearance subassembly is including collecting mechanism and dust absorption mechanism, through the clearance subassembly, can be convenient and quick adsorb the collection with the impurity on the workstation 3, and it is very convenient that the operation is got up, avoids the dust to drop to the outside, guarantees that the clean degree on the workstation 3 is not influenced.
In this embodiment, as shown in fig. 3, the collecting mechanism includes collecting frames 8 symmetrically installed at the edges of the two ends of the top of the worktable 3, and air pipes 6 connected with the outer side surfaces of the collecting frames 8 for adsorbing and collecting impurities; the output end of the air pipe 6 is connected with the feed end of the dust suction mechanism.
In this embodiment, as shown in fig. 4, the dust suction mechanism includes a collecting box 5, and a filter plate 17 is disposed inside the collecting box 5 for blocking impurities; and the collecting box 5 is divided into two chambers by a filter plate 17, wherein one chamber is connected with the output end line of the air pipe 6, and the other chamber is internally provided with an exhaust fan 18 for generating negative pressure to collect impurities.
As an alternative embodiment, the end surface of the collecting box 5 facing the air outlet end of the exhaust fan 18 is provided with a through hole.
As an alternative embodiment, the longitudinal section of the collecting frame 8 is in an L-shaped structure, and the outer end faces of the two ends of the collecting frame 8 are on the same plane with the front and back surfaces of the workbench 3.
As an alternative embodiment, the top end face of the workbench 3 is also provided with a detection table 1 for testing the electric power metering device;
furthermore, the top of the detection table 1 is provided with a plurality of operation buttons and connecting holes.
As an alternative embodiment, a bracket is mounted on the bottom end surface of the table 3, and the collecting box 5 is mounted on the bracket.
As an alternative embodiment, a protective plate 4 is further provided on one side of the bottom of the work table 3.
Example 2
The present embodiment provides a working method of a testing apparatus for an electric power metering device, where the testing apparatus for an electric power metering device described in embodiment 1 is adopted, and the method includes:
the method comprises the following steps: in the previous period of mouse installation, the wire hole reserved on the worktable 3 is led out, and then the transmission line 2 on the mouse penetrates through the space between the adjusting shaft 12 and the rotating shaft 10; during penetration, the adjusting shaft 12 is shifted downwards, so that the distance between the adjusting shaft 12 and the rotating shaft 10 is increased, and penetration is facilitated;
step two: after the installation is finished, the spring 13 drives the end shaft 16 and the adjusting shaft 12 to move towards the direction of the rotating shaft 10, at the moment, the latch 9 extrudes the transmission line 2, the limit on the transmission line 2 is realized, the length of the transmission line 2 reserved on the workbench 3 is fixed, even when the mouse drops, the damage caused by the fact that the mouse drops to the ground can be avoided, when the length needs to be adjusted, the transmission line 2 is pulled, at the moment, the transmission line 2 drives the adjusting shaft 12 to move downwards, the spring 13 is extruded, the distance between the adjusting shaft 12 and the rotating shaft 10 is increased, after the adjustment is finished, pulling on the transmission line 2 is released, and the latch 9 extrudes the transmission line 2 through rebounding of the spring 13;
step three: during measurement, materials such as data lines for detection are inserted into the detection table 1, and then the electric power metering device is tested and detected;
step four: after, start air exhauster 18 through external power source, air exhauster 18 produces the negative pressure to produce the negative pressure in collecting frame 8 through trachea 6, push impurity and dust on the workstation 3 towards the opening inboard of collecting frame 8 this moment, under the effect of negative pressure, in being inhaled to one of them cavity of collection box 5 in the trachea 6, and through filter 17 with the impurity shutoff, avoid moving inside another cavity, and the wind that air exhauster 18 produced is discharged from through-hole department.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (10)
1. An electric power metering device testing apparatus, comprising: the cleaning assembly and the limiting assembly are arranged on the workbench;
the cleaning assembly comprises collecting mechanisms arranged at two ends of the workbench and a dust collecting mechanism connected with the collecting mechanisms;
the limiting assembly comprises a mounting frame connected with the workbench and a movable clamping mechanism arranged in the mounting frame; the movable clamping mechanism comprises a rotating shaft and an adjusting shaft, and a transmission line penetrates between the rotating shaft and the adjusting shaft;
the rotating shaft is provided with a latch, end shafts at two ends of the adjusting shaft are embedded in the inner wall of the mounting frame, the inner wall of the mounting frame is provided with a side groove for the end shafts to be clamped and to move up and down, and a spring which is abutted against the end shafts is arranged in the side groove; the end shaft and the adjusting shaft are driven to move through the extension and retraction of the spring so as to adjust the distance between the adjusting shaft and the rotating shaft, and meanwhile, the clamping teeth extrude the transmission line to complete the limiting and adjusting of the length and the position of the transmission line.
2. The electric power measuring instrument testing device as claimed in claim 1, wherein the latch is disposed on the surface of the rotating shaft at an equal angle, and the transmission line abuts against the latch;
or the rotating shaft at one end of the rotating shaft is movably penetrated through the side edge of the mounting frame.
3. The electric power metering device testing device of claim 1, wherein the mounting frame is formed by four separate plate-shaped bodies, every two adjacent plate-shaped bodies are connected through a bolt, and the plate-shaped body forming the top of the mounting frame is connected with the workbench through a bolt.
4. The electric power meter testing device as claimed in claim 1, wherein the collecting mechanism comprises a collecting frame symmetrically installed at the edges of the two ends of the top of the workbench, and an air pipe connected with the outer side surface of the collecting frame, and the air pipe is connected with the feeding end of the dust suction mechanism.
5. The electric power meter testing device as claimed in claim 4, wherein the dust suction mechanism comprises a collection box, a filter plate is arranged inside the collection box to divide the collection box into two chambers through the filter plate, one chamber is connected with the air pipe, and the other chamber is provided with an exhaust fan.
6. The electric power measuring instrument testing device as claimed in claim 5, wherein the suction fan generates negative pressure and generates negative pressure in the collection frame through the air pipe, impurities on the worktable are sucked into one of the chambers from the air pipe under the action of the negative pressure and blocked by the filter plate, and air generated by the suction fan is discharged from the through hole.
7. The electric power metering device testing device of claim 5, wherein a through hole is formed in the end face, facing the air outlet end of the exhaust fan, of the collecting box;
or, be equipped with the support on the bottom face of workstation, collect the box and install on the support.
8. The electric power metering device testing device of claim 4, wherein the longitudinal section of the collecting frame is in an L-shaped structure, and the outer end faces of the two ends of the collecting frame and the front and rear surfaces of the workbench are positioned on the same plane.
9. The electric power metering device testing device as claimed in claim 1, wherein a drawer for placing a detection tool is arranged at the bottom of the workbench;
or the top end surface of the workbench is provided with a detection table for testing the electric power metering instrument, and the top of the detection table is provided with an operation button and a connecting hole;
or one side of the bottom of the workbench is provided with a protection plate.
10. An operation method of a power metering device testing apparatus, characterized in that the power metering device testing apparatus according to any one of claims 1 to 9 is used, comprising:
the distance between the adjusting shaft and the rotating shaft is increased by downwards shifting the adjusting shaft, so that the transmission line penetrates through the adjusting shaft and the rotating shaft;
the end shaft and the adjusting shaft are driven to move towards the direction of the rotating shaft through the extension of the spring, and the clamping teeth extrude the transmission line to complete the limit of the transmission line, so that the length of the transmission line reserved on the workbench is fixed;
when the length of the transmission line is adjusted, the transmission line is pulled, so that the transmission line drives the end shaft and the adjusting shaft to move downwards, the spring is extruded, and the distance between the adjusting shaft and the rotating shaft is increased;
after the length of the transmission line is adjusted, the transmission line is released to be pulled, and the clamping teeth are enabled to complete extrusion on the transmission line through resilience of the spring;
after the measurement is finished, the exhaust fan is started, the exhaust fan generates negative pressure, the negative pressure is generated in the collection frame through the air pipe, impurities on the workbench are sucked into one cavity from the air pipe under the action of the negative pressure, the impurities are blocked through the filter plate, and air generated by the exhaust fan is discharged from the through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210866489.5A CN115524651A (en) | 2022-07-22 | 2022-07-22 | Electric power metering instrument testing device and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210866489.5A CN115524651A (en) | 2022-07-22 | 2022-07-22 | Electric power metering instrument testing device and working method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115524651A true CN115524651A (en) | 2022-12-27 |
Family
ID=84696532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210866489.5A Pending CN115524651A (en) | 2022-07-22 | 2022-07-22 | Electric power metering instrument testing device and working method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115524651A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211154364U (en) * | 2019-11-22 | 2020-08-04 | 张清安 | Mouse line limiting frame convenient for fixing computer |
| CN212541281U (en) * | 2020-07-03 | 2021-02-12 | 东北林业大学 | Mouse with retractable wire |
| CN112932071A (en) * | 2021-03-11 | 2021-06-11 | 湖南文理学院 | Screen support frame of keyboard, mouse, screen that can accomodate fast |
| CN214024764U (en) * | 2020-12-08 | 2021-08-24 | 广州国冶机电安装有限公司 | Multi-shaft automatic screw locking machine |
-
2022
- 2022-07-22 CN CN202210866489.5A patent/CN115524651A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211154364U (en) * | 2019-11-22 | 2020-08-04 | 张清安 | Mouse line limiting frame convenient for fixing computer |
| CN212541281U (en) * | 2020-07-03 | 2021-02-12 | 东北林业大学 | Mouse with retractable wire |
| CN214024764U (en) * | 2020-12-08 | 2021-08-24 | 广州国冶机电安装有限公司 | Multi-shaft automatic screw locking machine |
| CN112932071A (en) * | 2021-03-11 | 2021-06-11 | 湖南文理学院 | Screen support frame of keyboard, mouse, screen that can accomodate fast |
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