CN111356294A - Corner trimming and cutting mechanism for printed circuit board - Google Patents
Corner trimming and cutting mechanism for printed circuit board Download PDFInfo
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- CN111356294A CN111356294A CN202010307756.6A CN202010307756A CN111356294A CN 111356294 A CN111356294 A CN 111356294A CN 202010307756 A CN202010307756 A CN 202010307756A CN 111356294 A CN111356294 A CN 111356294A
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- circuit board
- printed circuit
- fixedly mounted
- seat plate
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- 238000009966 trimming Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0044—Mechanical working of the substrate, e.g. drilling or punching
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
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Abstract
The invention discloses a corner trimming and cutting mechanism for a printed circuit board, which comprises a support frame, wherein support rods are fixedly arranged on the inner walls of the front end and the rear end of the support frame, rectangular columns are fixedly arranged between the two support rods and on the inner walls of the two ends of the support frame, a bottom plate is fixedly arranged at the upper ends of the two rectangular columns, a driving motor is fixedly arranged on the upper surface of the bottom plate, a first belt wheel is fixedly arranged on an output shaft of the driving motor, and a flat plate is fixedly arranged at the position, close to the middle part, of the upper end of. According to the invention, the printed circuit board can be fixed by matching the arranged positioning plate with the electric cylinder, and the printed circuit board can not be deviated during trimming, so that the accuracy is ensured.
Description
Technical Field
The invention relates to the technical field of trimming and cutting of circuit boards, in particular to a corner trimming and cutting mechanism for a printed circuit board.
Background
Printed wiring boards have been invented to date for over 60 years. History shows that: without a circuit board and without an electronic circuit, all of flight, traffic, atomic energy, computers, space navigation, communication and household appliances … … cannot be realized. The reason is easily understood. The chip I C, integrated circuit, is the grain of the electronic information industry, and the semiconductor technology represents the industrial modernization level of a country, leading the development of the electronic information industry. Electrical interconnection and assembly of semiconductors (integrated circuits, I C) must be done with circuit boards, which require trimming of the edges of the circuit boards during the manufacturing process.
Patent document (CN106142358A) discloses a corner cutting machine, and particularly relates to a corner cutting machine suitable for cutting and trimming a rectangular object. Including installing two looks spaced upper left electric saws on frame top crossbeam, the upper right electric saw, and install in the frame left side, the left side on the right both sides lateral wall is sawed down, the right side is sawed down, be equipped with the guide rail down between electric saw and the right side, install the slide rail that can follow the guide rail back-and-forth movement on the guide rail, be equipped with on the slide rail and be used for placing the rotatory mesa that makes rectangular object and rotatable, still install the guider who is used for making rectangular object keep linear motion on the left and right both sides lateral wall of frame. The invention has high working efficiency and convenient use; however, the corner cutting machine cannot position the circuit board, the accuracy during cutting is low, and the safety during cutting is not good.
Disclosure of Invention
In order to overcome the technical problems, the invention aims to provide a corner trimming and cutting mechanism for a printed circuit board, the printed circuit board can be fixed by matching an arranged positioning plate with an electric cylinder, so that the printed circuit board cannot deviate during trimming and cutting, the accuracy is ensured, the printed circuit board can be controlled to move in the transverse and longitudinal directions by matching a first hydraulic cylinder and a second hydraulic cylinder with the arranged first seat plate and the arranged second seat plate respectively, the printed circuit board is convenient to trim and cut, manual feeding is avoided, and the trimming and cutting safety is improved.
The purpose of the invention can be realized by the following technical scheme:
a corner trimming mechanism for a printed circuit board comprises a support frame, wherein support rods are fixedly mounted on the inner walls of the front end and the rear end of the support frame, rectangular columns are fixedly mounted between the two support rods and the inner walls of the two ends of the support frame, a bottom plate is fixedly mounted at the upper ends of the two rectangular columns, a driving motor is fixedly mounted on the upper surface of the bottom plate, a first belt wheel is fixedly mounted on an output shaft of the driving motor, a flat plate is fixedly mounted at a position, close to the middle part, of the upper end of the support frame, two vertical plates are fixedly mounted on the upper surface of the flat plate, and a rotating;
the utility model discloses a support frame, including the support frame, dull and stereotyped one side fixed mounting is kept away from to the upper surface of support frame has two parallel first slide rails, and the equal slidable mounting in upper end of two first slide rails has two first sliders, and the upper end fixed mounting of four first sliders has first bedplate, the last fixed surface of first bedplate installs first pneumatic cylinder, the piston rod fixed mounting of first pneumatic cylinder has first pull rod, the inner wall fixed mounting that the support frame is close to the upper end has first fixed block, the one end that first pneumatic cylinder was kept away from to first pull rod is fixed in on the first fixed block.
Further, the method comprises the following steps: the upper surface of the flat plate is provided with a hole at a position between the two vertical plates, the arc side surface of the rotating shaft is fixedly provided with a second belt wheel, and a belt penetrating through the hole is rotatably arranged between the second belt wheel and the first belt wheel.
Further, the method comprises the following steps: the cutting saw is fixedly installed at one end, penetrating through one vertical plate, of the second belt wheel, two supporting columns which are aligned with the two vertical plates in the same height are fixedly installed at the position, close to one end, of the upper surface of the supporting frame, and the workbench is fixedly installed at the upper ends of the two vertical plates and the two supporting columns.
Further, the method comprises the following steps: and a base plate is fixedly arranged on the upper surface of the workbench.
Further, the method comprises the following steps: the upper surface fixed mounting of first bedplate has two parallel second slide rails of placing, and the equal slidable mounting in upper end of two second slide rails has two second sliders, and the upper end fixed mounting of four second sliders has the second bedplate, the lower fixed surface of second bedplate installs the second pneumatic cylinder, the piston rod fixed mounting of second pneumatic cylinder has the second pull rod, the preceding fixed surface of first bedplate installs the second fixed block, the one end that the second pneumatic cylinder was kept away from to the second pull rod is fixed in on the second fixed block.
Further, the method comprises the following steps: the position that the upper surface of second bedplate is close to the rear end is fixed and is installed two guide posts, and the circular arc side slidable mounting of two guide posts has the locating plate, and the upper end fixed mounting of two guide posts has the fixed plate, the last fixed surface of fixed plate installs two electric cylinder, and the one end that the piston rod of two electric cylinder runs through the fixed plate all is fixed in on the locating plate.
Further, the method comprises the following steps: the upper surface of the second seat pan is horizontally aligned with the upper surface of the backing plate.
Further, the method comprises the following steps: the concrete application method of the corner trimming and cutting mechanism comprises the following steps:
the method comprises the following steps: placing the printed circuit board on a base plate on the workbench, pushing the printed circuit board onto a second base plate, leaving the corner to be trimmed on the base plate, starting electric cylinders on the fixing plate, and pushing the positioning plate to slide downwards along the two guide posts by the two electric cylinders until the printed circuit board is clamped;
step two: starting a second hydraulic cylinder on the second seat plate, pulling the second seat plate through a second pull rod on a second fixed block, sliding the second seat plate along two second slide rails through four second slide rails, and adjusting the cutting position of the printed circuit board on the second seat plate;
step three: the driving motor on the bottom plate is started, the running driving motor drives the first belt wheel to rotate, the rotating first belt wheel drives the rotating shaft to rotate through the belt, so that the rotating shaft is driven to rotate by the dicing saw, the first hydraulic cylinder on the first base plate is restarted, the first hydraulic cylinder pulls the first base plate through the first pull rod on the first fixed block, the first base plate slides along the directions of the two first slide rails to the dicing saw through the four first slide blocks, and the corners of the printed circuit board on the second base plate are trimmed.
The invention has the beneficial effects that:
1. the printed circuit board can be fixed by matching the arranged positioning plate with the electric cylinder, so that the printed circuit board can not deviate during trimming, the accuracy is ensured, the printed circuit board is placed on the base plate on the workbench, the printed circuit board is pushed onto the second base plate, the corner needing to be trimmed is left on the base plate, the electric cylinder on the fixing plate is started, and the two electric cylinders push the positioning plate to slide downwards along the two guide posts until the printed circuit board is clamped;
2. the first seat board and the second seat board are respectively matched with the first hydraulic cylinder and the second hydraulic cylinder for use, the printed circuit board can be controlled to move in the transverse and longitudinal directions, the printed circuit board is convenient to repair and cut, manual feeding is avoided, the repair and cut safety is improved, the second hydraulic cylinder on the second seat board is started, the second seat board is pulled through the second pull rod on the second fixed block, the second seat board slides along the two second slide rails through the four second slide rails, the cutting position of the printed circuit board on the second seat board is adjusted, the driving motor on the bottom board is started, the running driving motor drives the first belt pulley to rotate, the rotating first belt pulley drives the second belt pulley on the rotating shaft to rotate through a belt, so as to drive the cutting saw on the rotating shaft to rotate, the first hydraulic cylinder on the first seat board is started again, the first hydraulic cylinder pulls the first seat board through the first pull rod on the first fixed, the first seat plate slides along the two first sliding rails to the direction of the cutting saw through the four first sliding blocks, so that the corners of the printed circuit board on the second seat plate are trimmed and cut off.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall construction of the corner trimming mechanism of the present invention;
FIG. 2 is a schematic side view of the corner trimming mechanism of the present invention;
fig. 3 is another schematic structural view of the corner trimming mechanism of the present invention.
In the figure: 1. a support frame; 2. a support bar; 3. a base plate; 4. a drive motor; 5. a first pulley; 6. a belt; 7. a support pillar; 8. a vertical plate; 9. a work table; 10. a flat plate; 11. a rotating shaft; 12. a second pulley; 13. the holes are arranged; 14. cutting and sawing; 15. a first fixed block; 16. a first pull rod; 17. a first slide rail; 18. a first slider; 19. a first hydraulic cylinder; 20. a first seat plate; 21. a second slide rail; 22. a second pull rod; 23. a second fixed block; 24. a second hydraulic cylinder; 25. a second slider; 26. a second seat plate; 27. a guide post; 28. positioning a plate; 29. a fixing plate; 30. an electric cylinder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a corner trimming mechanism for a printed circuit board includes a support frame 1, wherein support rods 2 are fixedly mounted on inner walls of front and rear ends of the support frame 1, rectangular columns are fixedly mounted between the two support rods 2 and inner walls of two ends of the support frame 1, a bottom plate 3 is fixedly mounted on upper ends of the two rectangular columns, a driving motor 4 is fixedly mounted on an upper surface of the bottom plate 3, a first belt pulley 5 is fixedly mounted on an output shaft of the driving motor 4, a flat plate 10 is fixedly mounted at a position, close to the middle, of the upper end of the support frame 1, two vertical plates 8 are fixedly mounted on an upper surface of the flat plate 10, and a rotating shaft 11 is rotatably mounted between the two vertical plates;
one side fixed mounting that dull and stereotyped 10 was kept away from to the upper surface of support frame 1 has two parallel arrangement's first slide rail 17, and the equal slidable mounting in upper end of two first slide rails 17 has two first sliders 18, and the upper end fixed mounting of four first sliders 18 has first bedplate 20, the last fixed surface of first bedplate 20 installs first pneumatic cylinder 19, the piston rod fixed mounting of first pneumatic cylinder 19 has first pull rod 16, inner wall fixed mounting that support frame 1 is close to the upper end has first fixed block 15, first pull rod 16 keeps away from the one end of first pneumatic cylinder 19 and is fixed in on first fixed block 15.
A belt hole 13 is formed in the position, between the two vertical plates 8, on the upper surface of the flat plate 10, a second belt wheel 12 is fixedly mounted on the arc side surface of the rotating shaft 11, and a belt 6 penetrating through the belt hole 13 is rotatably mounted between the second belt wheel 12 and the first belt wheel 5; a cutting saw 14 is fixedly installed at one end of one vertical plate 8, which is penetrated through by the second belt wheel 12, two supporting columns 7 which are aligned with the two vertical plates 8 and have the same height are fixedly installed at the position, close to one end, of the upper surface of the supporting frame 1, and a workbench 9 is fixedly installed at the upper ends of the two vertical plates 8 and the two supporting columns 7; a backing plate 31 is fixedly arranged on the upper surface of the workbench 9;
the upper surface of the first seat plate 20 is fixedly provided with two second slide rails 21 which are arranged in parallel, the upper ends of the two second slide rails 21 are respectively provided with two second slide blocks 25 in a sliding manner, the upper ends of the four second slide blocks 25 are fixedly provided with a second seat plate 26, the lower surface of the second seat plate 26 is fixedly provided with a second hydraulic cylinder 24, a piston rod of the second hydraulic cylinder 24 is fixedly provided with a second pull rod 22, the front surface of the first seat plate 20 is fixedly provided with a second fixed block 23, and one end of the second pull rod 22, which is far away from the second hydraulic cylinder 24, is fixed on the second fixed block 23; two guide posts 27 are fixedly mounted on the upper surface of the second seat plate 26 near the rear end, positioning plates 28 are slidably mounted on the arc side surfaces of the two guide posts 27, fixing plates 29 are fixedly mounted at the upper ends of the two guide posts 27, two electric cylinders 30 are fixedly mounted on the upper surface of the fixing plate 29, and one ends of piston rods of the two electric cylinders 30 penetrating through the fixing plates 29 are fixed on the positioning plates 28; the upper surface of the second seat plate 26 is horizontally aligned with the upper surface of the pad plate 31.
The concrete application method of the corner trimming and cutting mechanism comprises the following steps:
the method comprises the following steps: placing the printed circuit board on a backing plate 31 on the workbench 9, pushing the printed circuit board onto the second seat plate 26, leaving the corner to be trimmed on the backing plate 31, starting the electric cylinders 30 on the fixing plate 29, and pushing the positioning plate 28 to slide downwards along the two guide posts 27 by the two electric cylinders 30 until the printed circuit board is clamped;
step two: starting a second hydraulic cylinder 24 on a second seat plate 26, pulling the second seat plate 26 through a second pull rod 22 on a second fixed block 23, and adjusting the cutting position of the printed circuit board on the second seat plate 26 when the second seat plate 26 slides along two second slide rails 21 through four second slide rails 21;
step three: start driving motor 4 on bottom plate 3, the driving motor 4 of operation drives first band pulley 5 and rotates, pivoted first band pulley 5 passes through belt 6 and drives second band pulley 12 on the pivot 11 and rotate, thereby drive the 14 rotations of slitting saw on the pivot 11, restart first pneumatic cylinder 19 on the first bedplate 20, first pneumatic cylinder 19 is through the first bedplate 20 of 16 pulling of first pull rod on the first fixed block 15, make first bedplate 20 slide to slitting saw 14's direction along two first slide rails 17 through four first sliders 18, thereby the corner of printed wiring board is repaiied and is cut away on the second bedplate 26.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (8)
1. The corner trimming and cutting mechanism for the printed circuit board is characterized by comprising a support frame (1), wherein support rods (2) are fixedly mounted on the inner walls of the front end and the rear end of the support frame (1), rectangular columns are fixedly mounted between the two support rods (2) and the inner walls of the two ends of the support frame (1), a bottom plate (3) is fixedly mounted at the upper ends of the two rectangular columns, a driving motor (4) is fixedly mounted on the upper surface of the bottom plate (3), a first belt wheel (5) is fixedly mounted on an output shaft of the driving motor (4), a flat plate (10) is fixedly mounted at a position, close to the middle part, of the upper end of the support frame (1), two vertical plates (8) are fixedly mounted on the upper surface of the flat plate (10), and a rotating shaft (11);
one side fixed mounting that dull and stereotyped (10) was kept away from to the upper surface of support frame (1) has two parallel first slide rail (17), and the equal slidable mounting in upper end of two first slide rail (17) has two first slider (18), and the upper end fixed mounting of four first slider (18) has first bedplate (20), the last fixed surface of first bedplate (20) installs first pneumatic cylinder (19), the piston rod fixed mounting of first pneumatic cylinder (19) has first pull rod (16), inner wall fixed mounting that support frame (1) is close to the upper end has first fixed block (15), the one end that first pneumatic cylinder (19) was kept away from in first pull rod (16) is fixed in on first fixed block (15).
2. A corner trimming mechanism for a printed circuit board according to claim 1, characterized in that a hole (13) is formed in the position, between the two vertical plates (8), on the upper surface of the flat plate (10), a second belt wheel (12) is fixedly installed on the arc side surface of the rotating shaft (11), and a belt (6) penetrating through the hole (13) is rotatably installed between the second belt wheel (12) and the first belt wheel (5).
3. The corner trimming mechanism for the printed circuit board according to claim 2, wherein the second belt wheel (12) penetrates through one end of one vertical plate (8) and is fixedly provided with a cutting saw (14), two supporting columns (7) which are respectively aligned with the two vertical plates (8) and have the same height are fixedly arranged at positions, close to one end, on the upper surface of the supporting frame (1), and the upper ends of the two vertical plates (8) and the two supporting columns (7) are fixedly provided with the workbench (9).
4. A corner trimming mechanism for printed wiring boards according to claim 3 wherein a backing plate (31) is fixedly mounted to the upper surface of the table (9).
5. The corner trimming mechanism for the printed circuit board according to claim 1, wherein two second sliding rails (21) arranged in parallel are fixedly mounted on the upper surface of the first seat plate (20), two second sliding blocks (25) are slidably mounted on the upper ends of the two second sliding rails (21), a second seat plate (26) is fixedly mounted on the upper ends of the four second sliding blocks (25), a second hydraulic cylinder (24) is fixedly mounted on the lower surface of the second seat plate (26), a second pull rod (22) is fixedly mounted on a piston rod of the second hydraulic cylinder (24), a second fixed block (23) is fixedly mounted on the front surface of the first seat plate (20), and one end, far away from the second hydraulic cylinder (24), of the second pull rod (22) is fixed on the second fixed block (23).
6. A corner trimming mechanism for a printed circuit board according to claim 5, wherein the position of the upper surface of the second seat plate (26) near the rear end is fixedly provided with two guide posts (27), the arc side surfaces of the two guide posts (27) are slidably provided with a positioning plate (28), the upper ends of the two guide posts (27) are fixedly provided with a fixing plate (29), the upper surface of the fixing plate (29) is fixedly provided with two electric cylinders (30), and one ends of the piston rods of the two electric cylinders (30) penetrating through the fixing plate (29) are fixed on the positioning plate (28).
7. A corner trimming mechanism for printed wiring boards according to claim 5 wherein the upper surface of the second seat plate (26) is horizontally aligned with the upper surface of the backing plate (31).
8. A corner trimming mechanism for a printed circuit board according to any one of claims 1 to 7, characterized in that the corner trimming mechanism is used in a specific way:
the method comprises the following steps: placing the printed circuit board on a backing plate (31) on a workbench (9), pushing the printed circuit board to a second seat plate (26), leaving the corner to be trimmed on the backing plate (31), starting electric air cylinders (30) on a fixing plate (29), pushing a positioning plate (28) by the two electric air cylinders (30) to slide downwards along two guide posts (27) until the printed circuit board is clamped;
step two: starting a second hydraulic cylinder (24) on a second seat plate (26), pulling the second seat plate (26) through a second pull rod (22) on a second fixed block (23), wherein the second seat plate (26) slides along two second slide rails (21) through four second slide rails (21), and the cutting position of a printed circuit board on the second seat plate (26) is adjusted;
step three: start driving motor (4) on bottom plate (3), driving motor (4) of operation drive first band pulley (5) and rotate, second band pulley (12) on first band pulley of pivoted (5) drive pivot (11) through belt (6) rotate, thereby it rotates to drive slitting saw (14) on pivot (11), first pneumatic cylinder (19) on first bedplate (20) of restart, first pneumatic cylinder (19) are through the first bedplate (20) of first pull rod (16) pulling on first fixed block (15), make first bedplate (20) slide to the direction of slitting saw (14) along two first slide rails (17) through four first slider (18), thereby the corner of printed wiring board is repaiied and is cut out on second bedplate (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010307756.6A CN111356294A (en) | 2020-04-17 | 2020-04-17 | Corner trimming and cutting mechanism for printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010307756.6A CN111356294A (en) | 2020-04-17 | 2020-04-17 | Corner trimming and cutting mechanism for printed circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111356294A true CN111356294A (en) | 2020-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010307756.6A Pending CN111356294A (en) | 2020-04-17 | 2020-04-17 | Corner trimming and cutting mechanism for printed circuit board |
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| Country | Link |
|---|---|
| CN (1) | CN111356294A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105538381A (en) * | 2016-01-25 | 2016-05-04 | 深圳市通为信电路科技有限公司 | Circuit board beveling machine |
| CN107835571A (en) * | 2017-10-31 | 2018-03-23 | 安徽深泽电子股份有限公司 | A kind of board production auxiliary mould |
| CN207522708U (en) * | 2017-11-13 | 2018-06-22 | 河源沃图电子科技有限公司 | A kind of circuit board of mobile phone cutter device |
| CN108818703A (en) * | 2018-05-29 | 2018-11-16 | 嘉善万得隆服饰辅料厂（普通合伙） | A kind of slicing device of button bar |
-
2020
- 2020-04-17 CN CN202010307756.6A patent/CN111356294A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105538381A (en) * | 2016-01-25 | 2016-05-04 | 深圳市通为信电路科技有限公司 | Circuit board beveling machine |
| CN107835571A (en) * | 2017-10-31 | 2018-03-23 | 安徽深泽电子股份有限公司 | A kind of board production auxiliary mould |
| CN207522708U (en) * | 2017-11-13 | 2018-06-22 | 河源沃图电子科技有限公司 | A kind of circuit board of mobile phone cutter device |
| CN108818703A (en) * | 2018-05-29 | 2018-11-16 | 嘉善万得隆服饰辅料厂（普通合伙） | A kind of slicing device of button bar |
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Application publication date: 20200630 |