CN214582963U - Standard part inner diameter detection tool - Google Patents

Standard part inner diameter detection tool Download PDF

Info

Publication number
CN214582963U
CN214582963U CN202120665081.2U CN202120665081U CN214582963U CN 214582963 U CN214582963 U CN 214582963U CN 202120665081 U CN202120665081 U CN 202120665081U CN 214582963 U CN214582963 U CN 214582963U
Authority
CN
China
Prior art keywords
rod
cavity
slider
wall
sliding
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
CN202120665081.2U
Other languages
Chinese (zh)
Inventor
马*
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.)
Xi'an Xician Precision Machinery Co ltd
Original Assignee
Xi'an Xician Precision Machinery 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 Xi'an Xician Precision Machinery Co ltd filed Critical Xi'an Xician Precision Machinery Co ltd
Priority to CN202120665081.2U priority Critical patent/CN214582963U/en
Application granted granted Critical
Publication of CN214582963U publication Critical patent/CN214582963U/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 discloses a standard part internal diameter detection instrument, including the footing, still including prevent that the cracked retaining structure of part, with fixed knot structure of work piece and adjustment measurement angle's revolution mechanic, the bottom plate is installed on the top of footing, and the inside of bottom plate has seted up first cavity, the driven lever is installed through the pivot in the inside bottom of first cavity, and the outer wall cover of the inside driven lever of first cavity is equipped with driven gear, driven gear's below is provided with drive gear, and one side of drive gear installs the actuating lever. The utility model discloses a be provided with and protect the lantern ring, the dipperstick carries out the in-process that removes, and the cover is established and is being protected the lantern ring and also begin to remove at the protection of dipperstick outer wall, drives the second slider through the connecting rod, makes the second slider slide bar outer wall inside the spout slide, and the sliding track with the dipperstick is the same, protects the dipperstick through the second slide bar, prevents its fracture, and this structure has realized the protection to measuring the part.

Description

Standard part inner diameter detection tool
Technical Field
The utility model relates to a detect instrument technical field, specifically be a standard part internal diameter detection instrument.
Background
In the process of measuring a workpiece, a measuring tool is required to be used for measuring the length and the like of the workpiece, and for certain circular workpieces with hollow structures and the like, a detection tool is required to be used for measuring the inner diameter of the workpiece.
When the first and the traditional inner diameter detection tools are used, a workpiece to be detected is not fixed, and inaccurate measurement is easily caused.
Second, when the traditional inner diameter detection tool is used for measurement, only the inner diameter of one position of a workpiece to be measured can be measured, and the measurement limitation is large.
Third, when the conventional inner diameter measuring tool is used for measurement, the parts used for measurement are prone to fracture.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a standard part internal diameter detects instrument to the work piece that provides in solving above-mentioned background art is not fixed, the great and measurement part of measuring limitation easily takes place cracked problem.
In order to achieve the above object, the utility model provides a following technical scheme: a standard part inner diameter detection tool comprises a bottom foot, a protection and holding structure for preventing parts from being broken, a fixing structure for fixing a workpiece and a rotating structure for adjusting a measurement angle;
the top end of each bottom foot is provided with a bottom plate, a first cavity is formed in the bottom plate, the bottom end of the interior of the first cavity is provided with a driven rod through a rotating shaft, the outer wall of the driven rod in the interior of the first cavity is sleeved with a driven gear, a driving gear is arranged below the driven gear, a driving rod is arranged on one side of the driving gear, one end of the driving rod extends to one side of the bottom plate, a placing plate is arranged at the top end of the bottom plate, and the fixing structures are located on two sides of the interior of the placing plate;
the top end of the driven rod sequentially penetrates through the bottom plate and the placing plate to extend to the upper side of the placing plate, and the rotating structure is located at the top end of the driven rod;
the two sides of the top end of the bottom plate are respectively provided with a fixed vertical plate, the top end of each fixed vertical plate is provided with a top plate, a third cavity is formed in the top plate, a first slide bar is transversely arranged in the third cavity, two first slide blocks are sleeved on the outer wall of the first slide bar, reciprocating springs are sleeved on the outer wall of the first slide bar between the first slide blocks, a pull rod is arranged at the top end of each first slide block, the top end of each pull rod extends to the upper side of the top plate, each pull rod and the first slide bars form a sliding structure through the first slide blocks, measuring scales are arranged at the front ends of the first slide blocks, and the protection structure is located at the bottom end of the top plate;
the protective holding structure comprises a sliding groove, the sliding groove is installed at the bottom end of the top plate, a second sliding rod is transversely installed inside the sliding groove, two second sliding blocks are sleeved on the outer wall of the second sliding rod, a connecting rod is installed at the front end of each second sliding block, and a protective holding lantern ring is installed at the front end of each connecting rod.
Preferably, the connecting rod all constitutes sliding structure through second slider and second slide bar, and protects and hold the lantern ring cover and locate the outer wall of dipperstick.
Preferably, fixed knot constructs including bull stick, knob, second cavity, splint, screw thread roller and screw thread slider, the second cavity is all seted up in the inside both sides of settling the board, and the inside one side of being close to the driven lever of settling the board all installs the bull stick through the pivot, the knob is installed to the one end of bull stick, and the outer wall of the inside bull stick of second cavity all overlaps and is equipped with the screw thread roller, the outer wall of screw thread roller all overlaps and is equipped with the screw thread slider, and the splint are all installed on the top of screw thread slider.
Preferably, one end of the rotating rod extends to two sides of the placing plate, and the threaded sliding block is meshed with the threaded roller.
Preferably, revolution mechanic includes push rod, electro-magnet, rotation groove, push pedal, floating spring and iron system slider, rotate the groove and install on the top of driven lever, and rotate the intermediate position department of inslot portion and install the electro-magnet, the rotation inslot portion of electro-magnet both sides all is provided with iron system slider, one side that the electro-magnet was kept away from to iron system slider all installs the push rod, and the push rod outer wall that rotates inslot portion all overlaps and is equipped with floating spring, the push pedal is installed to the one end of push rod.
Preferably, one end of the push rod extends to the outside of one side of the rotating groove, and the push rod and the rotating groove form a sliding structure through an iron sliding block.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the rotary rod is arranged, the knob is rotated to drive the rotary rod to rotate, the threaded roller is driven by the rotary rod to rotate, and the threaded roller is meshed with the rotary rod, so that the threaded slider is driven to transversely move in the second cavity in the rotating process of the threaded roller, the position of the threaded slider is adjusted by continuously rotating the knob, namely, the distance between the clamping plates is adjusted, a workpiece between the clamping plates is fixed, and the workpiece is fixed by the structure, so that the workpiece is prevented from being deviated in the measuring process;
(2) by arranging the protective sleeve ring, the protective sleeve ring sleeved on the outer wall of the measuring scale also starts to move in the process of moving the measuring scale, the second slide block is driven by the connecting rod to slide on the outer wall of the second slide rod in the sliding groove and has the same sliding track as that of the measuring scale, the measuring scale is protected by the second slide rod to prevent the measuring scale from being broken, and the structure realizes the protection of measuring parts;
(3) through being provided with the electro-magnet, the electro-magnet outage that will be in the on state originally, the slider made of iron loses magnetic attraction, the activity spring that is in tensile state produces reaction force, with the slider pulling made of iron, make the slider made of iron slide the inside in rotation groove and slide, it stretches out the rotation groove to promote the push rod, and promote the push pedal and carry out the block to the inner wall of work piece, the block finishes the back, it is rotatory that the staff rotates the rocker and drives the actuating lever, it is rotatory to drive gear through the actuating lever, also begin to rotate with drive gear meshed driven gear, it is rotatory to drive the driven lever, make the rotation groove rotate under the drive by the driven lever again, it measures to make the work piece change angle, the conversion of work piece measurement angle has been realized to this structure, measuring diversity has been improved.
Drawings
FIG. 1 is a schematic sectional view of the front view of the present invention;
fig. 2 is a schematic view of the structure of the present invention;
FIG. 3 is a schematic side view of the present invention;
fig. 4 is an enlarged schematic structural diagram of a in fig. 1 according to the present invention.
In the figure: 1. footing; 2. a first cavity; 3. a driven lever; 4. a drive gear; 5. a drive rod; 6. a rotating rod; 7. a base plate; 8. a fixed structure; 9. a rotating structure; 901. a push rod; 902. an electromagnet; 903. a rotating groove; 904. pushing the plate; 905. a movable spring; 906. a slider made of iron; 10. fixing the vertical plate; 11. a knob; 12. a second cavity; 13. a splint; 14. a top plate; 15. a third cavity; 16. a pull rod; 17. a reciprocating spring; 18. measuring a scale; 19. a first slide bar; 20. a second slider; 21. a chute; 22. a second slide bar; 23. a retaining collar; 24. placing a plate; 25. a threaded roller; 26. a threaded slider; 27. a driven gear; 28. a first slider; 29. a connecting rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1: referring to fig. 1-4, an inner diameter inspection tool for a standard part includes a bottom foot 1, a retaining structure for preventing a part from being broken, a fixing structure 8 for fixing a workpiece, and a rotating structure 9 for adjusting a measurement angle;
the top end of the bottom foot 1 is provided with a bottom plate 7, a first cavity 2 is formed in the bottom plate 7, the bottom end of the interior of the first cavity 2 is provided with a driven rod 3 through a rotating shaft, a driven gear 27 is sleeved on the outer wall of the driven rod 3 in the first cavity 2, a driving gear 4 is arranged below the driven gear 27, a driving rod 5 is arranged on one side of the driving gear 4, one end of the driving rod 5 extends to one side of the bottom plate 7, a placing plate 24 is arranged at the top end of the bottom plate 7, and the fixing structures 8 are located on two sides of the interior of the placing plate 24;
the top end of the driven rod 3 sequentially penetrates through the bottom plate 7 and the placing plate 24 to extend above the placing plate 24, and the rotating structure 9 is positioned at the top end of the driven rod 3;
the two sides of the top end of the bottom plate 7 are respectively provided with a fixed vertical plate 10, the top end of the fixed vertical plate 10 is provided with a top plate 14, a third cavity 15 is formed in the top plate 14, a first slide rod 19 is transversely arranged in the third cavity 15, two first slide blocks 28 are sleeved on the outer wall of the first slide rod 19, reciprocating springs 17 are sleeved on the outer wall of the first slide rod 19 between the first slide blocks 28, a pull rod 16 is arranged at the top end of the first slide block 28, the top end of the pull rod 16 extends to the upper side of the top plate 14, the pull rod 16 forms a sliding structure through the first slide block 28 and the first slide rod 19, the front end of the first slide block 28 is provided with a measuring ruler 18, and the protecting and holding structure is located at the bottom end of the top plate 14;
referring to fig. 1-4, the tool for detecting the inner diameter of the standard component further includes a protection structure, the protection structure includes a sliding groove 21, the sliding groove 21 is installed at the bottom end of the top plate 14, a second sliding rod 22 is transversely installed inside the sliding groove 21, two second sliding blocks 20 are sleeved on the outer wall of the second sliding rod 22, connecting rods 29 are installed at the front ends of the second sliding blocks 20, and protection lantern rings 23 are installed at the front ends of the connecting rods 29;
the connecting rods 29 form a sliding structure through the second sliding blocks 20 and the second sliding rods 22, and the protective lantern ring 23 is sleeved on the outer wall of the measuring ruler 18;
specifically, as shown in fig. 1, fig. 2 and fig. 3, when the mechanism is used, in the process that the measuring scale 18 moves, the protective sleeve ring 23 sleeved on the outer wall of the measuring scale 18 also starts to move, the connecting rod 29 drives the second slider 20 to make the second slider 20 slide on the outer wall of the second slide bar 22 inside the sliding groove 21, and the sliding track of the second slider 20 is the same as that of the measuring scale 18, so that the measuring scale 18 is protected by the second slide bar 22 to prevent the measuring scale 18 from breaking.
Example 2: the fixing structure 8 comprises a rotating rod 6, a knob 11, a second cavity 12, a clamping plate 13, a threaded roller 25 and a threaded slider 26, the second cavity 12 is arranged on two sides inside a placing plate 24, the rotating rod 6 is arranged on one side, close to the driven rod 3, inside the placing plate 24 through a rotating shaft, the knob 11 is arranged at one end of the rotating rod 6, the threaded roller 25 is sleeved on the outer wall of the rotating rod 6 inside the second cavity 12, the threaded slider 26 is sleeved on the outer wall of the threaded roller 25, and the clamping plate 13 is arranged at the top end of the threaded slider 26;
one end of the rotating rod 6 extends to two sides of the placing plate 24, and the threaded sliding block 26 is meshed with the threaded roller 25;
specifically, as shown in fig. 1, when the mechanism is used, the knob 11 is rotated to drive the rotating rod 6 to rotate, the threaded roller 25 is driven by the rotating rod 6 to rotate, and due to the fact that the threaded roller 25 is meshed with the rotating rod 6, the threaded slider 26 is driven to move transversely inside the second cavity 12 in the rotating process of the threaded roller 25, and the position of the threaded slider 26 is adjusted by continuously rotating the knob 11, namely, the distance between the clamping plates 13 is adjusted, so that workpieces between the clamping plates 13 are fixed.
Example 3: the rotating structure 9 comprises a push rod 901, an electromagnet 902, a rotating groove 903, a push plate 904, a movable spring 905 and an iron slider 906, the rotating groove 903 is mounted at the top end of the driven rod 3, the electromagnet 902 is mounted in the middle of the rotating groove 903, the iron sliders 906 are arranged in the rotating grooves 903 at two sides of the electromagnet 902, the push rod 901 is mounted on one side, away from the electromagnet 902, of the iron slider 906, the movable spring 905 is sleeved on the outer wall of the push rod 901 in the rotating groove 903, and the push plate 904 is mounted at one end of the push rod 901;
one end of the push rod 901 extends to the outside of one side of the rotating groove 903, and the push rods 901 and the rotating groove 903 form a sliding structure through an iron slider 906;
specifically, as shown in fig. 1 and 4, when the mechanism is used, the electromagnet 902 which is originally in the power-on state is powered off, the iron slider 906 loses magnetic attraction, the movable spring 905 in the stretching state generates a reaction force, the iron slider 906 is pulled, the iron slider 906 slides in the rotating groove 903, the push rod 901 is pushed to extend out of the rotating groove 903, and the push plate 904 is pushed to clamp the inner wall of the workpiece.
The working principle is as follows: when using this device, at first, the staff will wait to detect the work piece and place on the top of setter plate 24, and will rotate inside groove 903 and dipperstick 18 are arranged in the work piece, rotate knob 11, it is rotatory to drive bull stick 6, under the drive of bull stick 6, make screw thread roller 25 rotatory, because screw thread roller 25 and bull stick 6 intermeshing, so when the rotatory in-process of screw thread roller 25, it is horizontal removal to drive screw thread slider 26 in the inside of second cavity 12, adjust the position of screw thread slider 26 through constantly rotating knob 11, adjust the distance between splint 13 promptly, it is fixed with the work piece between splint 13.
Afterwards, before placing on the top of the placing plate 24, the staff pulls the pull rod 16, make the pull rod 16 approach to each other, drive the dipperstick 18 to approach to each other through the first slider 28, when the work piece is fixed, the staff loosens the pull rod 16, under the reaction force of the reciprocating spring 17, make the first slider 28 drive the dipperstick 18 to keep away from each other, to the internal diameter measurement of work piece, in the process that the dipperstick 18 moved, the guard lantern ring 23 that the cover was established at the dipperstick 18 outer wall also begins to move, drive the second slider 20 through the connecting rod 29, make the second slider 20 slide at the inside second slide bar 22 outer wall of spout 21 slip, and the same with the slip orbit of dipperstick 18, protect the dipperstick 18 through the second slide bar 22, prevent its fracture.
Finally, after measuring the internal diameter in an azimuth, the staff will fix and remove, the electro-magnet 902 that will be in the on state originally cuts off the power supply, the slider 906 made of iron loses the magnetic attraction, the movable spring 905 that is in the tensile state produces the reaction force, pull slider 906 made of iron, make slider 906 made of iron slide in the inside of rotating groove 903, promote push rod 901 and make it stretch out rotating groove 903, and promote push pedal 904 and carry out the block to the inner wall of work piece, after the block finishes, the staff rotates the rocker and drives actuating lever 5 rotatory, drive gear 4 through actuating lever 5 and rotate, driven gear 27 with drive gear 4 meshing also begins to rotate, drive driven lever 3 is rotatory, make rotating groove 903 rotate under the drive of driven lever 3 again, make work piece change angle measure.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (7)

1. A standard part internal diameter detection tool comprises a footing (1), and is characterized in that: the device also comprises a protective structure for preventing the part from being broken, a fixed structure (8) for fixing the workpiece and a rotating structure (9) for adjusting the measuring angle;
the bottom plate (7) is installed at the top end of the bottom foot (1), the first cavity (2) is formed in the bottom plate (7), the driven rod (3) is installed at the bottom end inside the first cavity (2) through a rotating shaft, the driven gear (27) is sleeved on the outer wall of the driven rod (3) inside the first cavity (2), the driving gear (4) is arranged below the driven gear (27), the driving rod (5) is installed on one side of the driving gear (4), one end of the driving rod (5) extends to one side of the bottom plate (7), the mounting plate (24) is installed at the top end of the bottom plate (7), and the fixing structures (8) are located on two sides inside the mounting plate (24);
the top end of the driven rod (3) sequentially penetrates through the bottom plate (7) and the placing plate (24) to extend to the upper side of the placing plate (24), and the rotating structure (9) is located at the top end of the driven rod (3);
both sides of the top end of the bottom plate (7) are provided with fixed vertical plates (10), the top ends of the fixed vertical plates (10) are provided with top plates (14), a third cavity (15) is arranged inside the top plate (14), a first sliding rod (19) is transversely arranged inside the third cavity (15), two first sliding blocks (28) are sleeved on the outer wall of the first sliding rod (19), reciprocating springs (17) are sleeved on the outer wall of the first sliding rod (19) between the first sliding blocks (28), and the top end of the first sliding block (28) is provided with a pull rod (16), the top ends of the pull rods (16) all extend to the upper part of the top plate (14), and the pull rods (16) form a sliding structure with the first sliding rod (19) through the first sliding block (28), the front end of the first sliding block (28) is provided with a measuring scale (18), and the protecting and holding structure is positioned at the bottom end of the top plate (14).
2. The inspection tool for internal diameter of standard component as claimed in claim 1, wherein: protect and hold structure and include spout (21), spout (21) are installed in the bottom of roof (14), and the inside of spout (21) transversely installs second slide bar (22), the outer wall cover of second slide bar (22) is equipped with two second sliders (20), and the front end of second slider (20) all installs connecting rod (29), the front end of connecting rod (29) all is installed and is protected and hold lantern ring (23).
3. The inspection tool for the inner diameter of a standard member according to claim 2, wherein: the connecting rod (29) forms a sliding structure through the second sliding block (20) and the second sliding rod (22), and the outer wall of the measuring scale (18) is sleeved with the protective lantern ring (23).
4. The inspection tool for internal diameter of standard component as claimed in claim 1, wherein: fixed knot constructs (8) including bull stick (6), knob (11), second cavity (12), splint (13), screw thread roller (25) and screw thread slider (26), the inside both sides of settling plate (24) are all seted up in second cavity (12), and one side that settling plate (24) inside is close to driven lever (3) all installs bull stick (6) through the pivot, knob (11) are installed to the one end of bull stick (6), and the outer wall of the inside bull stick (6) of second cavity (12) all overlaps and is equipped with screw thread roller (25), the outer wall of screw thread roller (25) all overlaps and is equipped with screw thread slider (26), and splint (13) are all installed on the top of screw thread slider (26).
5. The inspection tool for internal diameter of standard component as claimed in claim 4, wherein: one end of the rotating rod (6) extends to two sides of the placing plate (24), and the threaded sliding block (26) is meshed with the threaded roller (25).
6. The inspection tool for internal diameter of standard component as claimed in claim 1, wherein: revolution mechanic (9) include push rod (901), electro-magnet (902), rotate groove (903), push pedal (904), activity spring (905) and iron system slider (906), it installs on the top of driven lever (3) to rotate groove (903), and rotates the inside intermediate position department in groove (903) and install electro-magnet (902), the rotation groove (903) of electro-magnet (902) both sides is inside all to be provided with iron system slider (906), push rod (901) are all installed to one side that electro-magnet (902) were kept away from in iron system slider (906), and rotate the inside push rod (901) outer wall in groove (903) and all overlap and be equipped with activity spring (905), push pedal (904) are installed to the one end of push rod (901).
7. The inspection tool for internal diameter of standard component of claim 6, wherein: one end of the push rod (901) extends to the outside of one side of the rotating groove (903), and the push rod (901) and the rotating groove (903) form a sliding structure through an iron slider (906).
CN202120665081.2U 2021-03-28 2021-03-28 Standard part inner diameter detection tool Active CN214582963U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120665081.2U CN214582963U (en) 2021-03-28 2021-03-28 Standard part inner diameter detection tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120665081.2U CN214582963U (en) 2021-03-28 2021-03-28 Standard part inner diameter detection tool

Publications (1)

Publication Number Publication Date
CN214582963U true CN214582963U (en) 2021-11-02

Family

ID=78322650

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120665081.2U Active CN214582963U (en) 2021-03-28 2021-03-28 Standard part inner diameter detection tool

Country Status (1)

Country Link
CN (1) CN214582963U (en)

Similar Documents

Publication Publication Date Title
CN205091188U (en) Sample fixing device is used to circular cross section sample percentage elongation after fracture survey
CN214582963U (en) Standard part inner diameter detection tool
CN208751527U (en) A kind of monitor station and its detection jig of handware processing
CN214251885U (en) Seal device is surveyed to supersound resilience synthesis method supersound tie
CN217901358U (en) Numerical control cutter hardness detection equipment
CN217689275U (en) High-precision linear module for pcb test
CN211855230U (en) Detection clamp for shaft parts
CN210676758U (en) High-precision electric wire intercepting device for electric power
CN209868495U (en) Multifunctional mechanical wrench for automobile
CN216502098U (en) Reinforcing bar cutting equipment for civil engineering
CN113702879B (en) Underwater measurement fluxgate sensor convenient to adjust
CN215491454U (en) A inside and outside diameter detection device for mould processing
CN220891776U (en) Main machine fixture device for measuring verticality of guide rail
CN211939701U (en) Cutting device of steel plate
CN220542664U (en) Building concrete strength testing arrangement
CN218884848U (en) Inner and outer diameter measuring device
CN218068604U (en) Mechanical watch sample detection platform
CN217654405U (en) Precision measurement device for part production
CN215894277U (en) Shore durometer measurement rubber hardness auxiliary device
CN210835239U (en) Pipe ranging device
CN220524844U (en) Quick detection device of accurate part size
CN220960942U (en) Building engineering detection device
CN218673468U (en) External spline detector for detecting spline mandrel
CN219284157U (en) Concrete crack width detection equipment
CN218481010U (en) Novel calibration equipment for hob detection

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant