CN111620107A - Blocking-free sucker - Google Patents
Blocking-free sucker Download PDFInfo
- Publication number
- CN111620107A CN111620107A CN202010456221.5A CN202010456221A CN111620107A CN 111620107 A CN111620107 A CN 111620107A CN 202010456221 A CN202010456221 A CN 202010456221A CN 111620107 A CN111620107 A CN 111620107A
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- China
- Prior art keywords
- plug
- free
- panel
- air
- elastic piece
- 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.)
- Pending
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- 238000001179 sorption measurement Methods 0.000 claims abstract description 33
- 238000009423 ventilation Methods 0.000 claims description 16
- 238000010521 absorption reaction Methods 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
- B65G47/90—Devices for picking-up and depositing articles or materials
- B65G47/91—Devices for picking-up and depositing articles or materials incorporating pneumatic, e.g. suction, grippers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
Abstract
The invention discloses a blocking-free sucker, which comprises a panel and a bottom plate, wherein the panel is provided with a plurality of adsorption holes, the blocking-free sucker also comprises a plug assembly, the plug assembly comprises a plug and an elastic piece, the blocking-free sucker is provided with a plurality of air passages, each air passage is communicated with one or more adsorption holes, the plug and the elastic piece are positioned in the air passages, the plug is positioned on the elastic piece, the air passages are pumped, when the adsorption holes are not covered by a workpiece, negative pressure is formed below the plug, normal atmospheric pressure above the plug enables the plug to be pressed downwards to seal the air passages, and the adsorption holes which are not covered by the workpiece are sealed; when the adsorption holes are covered by the workpiece, negative pressure is formed below the plugs, negative pressure is formed between the plugs and the workpiece, the plugs are free of air pressure stress, the air passages are opened by the elasticity of the elastic pieces, the adsorption holes keep the negative pressure to adsorb the workpiece, the problem of air leakage is solved, and air leakage can be prevented without blocking.
Description
Technical Field
The invention relates to a sucker, in particular to a blocking-free sucker.
Background
The sucking disc that uses on the existing market, under the unmatched condition of work piece and sucking disc breadth, there is not the sucking disc part that covers the work piece, can leak gas, leads to the atmospheric pressure in the sucking disc to weaken, and the adsorption affinity reduces, and the sucking disc just can not be inhaled or inhale tight work piece this moment. The method adopted at present is to divide the sucker into a plurality of areas, and the area without the sucker covering the workpiece is closed through a valve. The method increases the processing cost of the sucker and the control cost of the valve, and can only reduce air leakage to a certain extent and cannot completely stop air leakage. There is also a method of covering the suction cup portion not covered with the workpiece with a paper-like article. The method can reduce air leakage to a great extent, but the operation is complicated, the operation efficiency is seriously influenced, the automation is not facilitated, and the paper articles used for covering influence the operation and the quality of the processed products.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the invention is to provide a blocking-free sucker, wherein the suction hole can be automatically blocked in an area which is not covered by a workpiece, and the sucker can automatically open the suction hole to realize the function of sucking the workpiece in the area which is covered by the workpiece, so that the problem of air leakage is solved, and the purpose of preventing air leakage without blocking is realized.
One of the purposes of the invention is realized by adopting the following technical scheme:
a blockage-free sucker comprises a panel and a bottom plate, wherein the panel is provided with a plurality of adsorption holes, the blockage-free sucker further comprises a plug assembly, the plug assembly comprises a plug and an elastic piece, the blockage-free sucker is provided with a plurality of air passages, each air passage is communicated with one or more adsorption holes, the plug and the elastic piece are located in the air passages, the plug is located on the elastic piece, the air passages are exhausted, when the adsorption holes are not covered by a workpiece, negative pressure is formed below the plug, normal atmospheric pressure above the plug enables the plug to be pressed downwards to seal the air passages, and the adsorption holes which are not covered by the workpiece are sealed; when the adsorption holes are covered by the workpiece, negative pressure is formed below the plugs, negative pressure is formed between the plugs and the workpiece, the plugs are free of air pressure stress, the air passages are opened by the elasticity of the elastic pieces, and the adsorption holes keep negative pressure to adsorb the workpiece.
Furthermore, the plug assembly further comprises a valve seat, the valve seat is provided with an elastic piece chamber and a ventilation tail hole, the elastic piece chamber is communicated with the ventilation tail hole, and the elastic piece is installed in the elastic piece chamber.
Furthermore, the valve seat is further provided with a plug chamber, the plug is located in the plug chamber, the plug chamber is communicated with the elastic piece chamber, the plug chamber, the elastic piece chamber and the ventilation tail hole jointly form the air passage, a plugging step is formed between the plug chamber and the elastic piece chamber, and the plug abuts against the plugging step to seal the air passage.
Further, the panel is provided with a mounting hole, and the valve seat is mounted in the mounting hole.
Further, the valve seat is installed in the base plate.
Further, the plug assembly further comprises a mounting plate, a plurality of valve seats are mounted on the mounting plate, and the mounting plate is located between the panel and the bottom plate.
Furthermore, the panel is provided with a mounting hole, the valve seat is mounted on the lower portion of the mounting hole, the plug is located on the upper portion of the mounting hole, the elastic element chamber and the ventilation tail hole jointly form the air passage, a plugging step is formed between the upper portion of the mounting hole and the elastic element chamber, and the plug abuts against the plugging step to enable the air passage to be closed.
Further, the end cap subassembly still includes the mounting panel, the mounting panel is located the panel with between the bottom plate, the mounting panel is equipped with the mounting hole, and is a plurality of the disk seat install in the mounting hole lower part, the end cap is located mounting hole upper portion, mounting hole upper portion the elastic component room reaches the tail hole of ventilating forms above-mentioned air flue jointly, mounting hole upper portion with form the shutoff step between the elastic component room, the end cap with the conflict of shutoff step makes the air flue seals.
Further, the plug assembly further comprises a mounting plate, the mounting plate is located between the panel and the bottom plate, the mounting plate is provided with a plug chamber, an elastic piece chamber and a ventilation tail hole, the plug is located in the plug chamber, the elastic piece is installed in the elastic piece chamber, the plug chamber, the elastic piece chamber and the ventilation tail hole jointly form the air passage, a plugging step is formed between the plug chamber and the elastic piece chamber, and the plug abuts against the plugging step to enable the air passage to be sealed.
Further, the bottom plate is provided with an air suction opening, and the air suction opening is communicated with the air passage.
Compared with the prior art, the suction opening of the blocking-free sucker is connected with an external fan through the air pipe, the fan exhausts air, the blocking-free sucker is not covered by a workpiece in an area, the negative pressure of the fan is communicated to the air passage from the suction opening, the negative pressure is formed below the plug, the normal atmospheric pressure above the plug enables the plug to press downwards to seal the air passage, and the adsorption hole which is not covered by the workpiece is plugged; when the adsorption hole is covered by a workpiece, negative pressure is formed below the plug, negative pressure is formed between the plug and the workpiece, the plug is free of air pressure stress, the air channel is opened by the elasticity of the elastic piece, the negative pressure of the adsorption hole is stably kept, the function of adsorbing the workpiece is realized, the problem of air leakage is solved, and the effect of preventing air leakage without blocking is realized.
Drawings
FIG. 1 is a perspective view of a first embodiment of the block-free suction cup of the present invention;
FIG. 2 is an exploded view of the block-free suction cup of FIG. 1;
FIG. 3 is a perspective view of a faceplate of the block-free suction cup of FIG. 2;
FIG. 4 is a schematic view of the internal structure of the panel of FIG. 3;
FIG. 5 is a perspective view of the base plate of the block-free suction cup of FIG. 2;
FIG. 6 is an exploded view of the bulkhead assembly of the block-free suction cup of FIG. 2;
FIG. 7 is a schematic illustration of the valve seat of the plug assembly of FIG. 6;
FIG. 8 is a schematic diagram of an internal structure of the block-free sucker of FIG. 1;
FIG. 9 is a schematic structural view of a panel of a second embodiment of the block-free suction cup of the present invention;
FIG. 10 is a schematic structural view of a third embodiment of the block-free suction cup of the present invention;
FIG. 11 is a schematic structural view of a fourth embodiment of the block-free suction cup of the present invention;
FIG. 12 is a schematic structural view of a fifth embodiment of the block-free suction cup of the present invention;
FIG. 13 is a schematic structural view of a sixth embodiment of the block-free suction cup of the present invention;
FIG. 14 is a schematic structural view of a seventh embodiment of the block-free suction cup of the present invention;
fig. 15 is a perspective view of a bottom plate of an eighth embodiment of the block-free suction cup of the present invention.
In the figure: 10. a panel; 11. mounting holes; 12. an adsorption hole; 20. a base plate; 21. a longitudinal vent channel; 22. a transverse vent slot; 23. an air suction opening; 24. a cavity; 30. a plug assembly; 31. a plug; 32. an elastic member; 33. a valve seat; 330. a plug chamber; 331. an elastic member chamber; 332. a vent tail hole; 34. and (7) mounting the plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present, secured by intervening elements. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
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. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 8, a block-free suction cup according to a first embodiment of the present invention is shown, in which the block-free suction cup includes a panel 10, a bottom plate 20, and a plurality of plug assemblies 30.
The panel 10 is provided with a plurality of mounting holes 11 and a plurality of suction holes 12. The number of the mounting holes 11 is the same as the number of the suction holes 12. A plurality of adsorption holes 12 are uniformly distributed on the upper surface of the panel 10. Each of the mounting holes 11 communicates with a suction hole 12. The suction hole 12 is located above the mounting hole 11 and communicates with the mounting hole 11. The adsorption hole 12 is one of holes with the same functions, such as a straight hole, a stepped hole, a tapered hole and the like.
The bottom plate 20 is provided with longitudinal ventilation grooves 21, transverse ventilation grooves 22 and an air suction opening 23. The number of the longitudinal ventilation grooves 21 and the number of the lateral ventilation grooves 22 are both plural. A plurality of longitudinal ventilation grooves 21 are spaced apart from and arranged parallel to the inner surface of the bottom plate 20. A plurality of transverse ventilation slots 22 are spaced apart and parallel to each other on the inner surface of the base plate 20. Each longitudinal vent slot 21 is perpendicular to the transverse vent slots 22. The plurality of longitudinal vent grooves 21 and the plurality of transverse vent grooves 22 communicate with each other. The suction opening 23 is located at the center of the base plate 20 and has a circular shape.
The number of the plug assemblies 30 corresponds to the number of the adsorption holes 12. Each plug assembly 30 includes a plug 31, a resilient member 32, and a valve seat 33. The plug 31 is any one of ball, column, cone and the like with similar functions. The resilient member 32 is a spring in this embodiment. The valve seat 33 is provided with a plug chamber 330, an elastic member chamber 331, and a vent tail hole 332. The elastomeric chamber 331 is located between the plug chamber 330 and the vent tail holes 332. A sealing step is formed between the elastic member chamber 331 and the vent tail hole 332. The plug chamber 330, the elastomeric chamber 331, and the vent tail holes 332 form an air passage. In this embodiment, the plug chamber 330 and the vent tail 332 are both cylindrical, and the diameter of the plug chamber 330 is larger than the diameter of the vent tail 332.
When the block-free suction cup is assembled, the elastic member 32 is installed in the elastic member chamber 331 of the valve seat 33. The plug 31 is located on the resilient member 32. A plug assembly 30 is installed in the installation hole 11 of each panel 10. The bottom plate 20 is fixed to the panel 10, and the vent tail holes 332 of the plug assemblies 30 are all communicated with the air suction opening 23 through the longitudinal vent grooves 21 and the transverse vent grooves 22.
When the non-blocking sucker is used, the air suction port 23 is connected with an external fan through an air pipe, and the fan sucks air. In the region where the non-blocking sucking disc is not covered by the workpiece, the negative pressure of the fan is communicated to the longitudinal vent groove 21 and the transverse vent groove 22 from the air suction opening 23 and communicated to the plug assembly 30, at this time, the lower part of the plug 31 has the negative pressure, the upper part of the plug 31 is at normal atmospheric pressure, the plug 31 is pressed downwards to block the channels of the plug chamber 330 and the elastic member chamber 331, and at this time, the region which is not covered by the workpiece completes the blocking function. The workpiece placing area is communicated with the longitudinal vent groove 21 and the transverse vent groove 22 through the suction opening 23 by the negative pressure of the fan, the plug assembly 30 is communicated with the lower portion of the plug 31 by the negative pressure, the adsorption hole 12 is covered by the workpiece at the moment, the same negative pressure is formed by the air pressure on the upper portion of the adsorption hole 12 and the air pressure on the upper portion of the plug 31, the plug 31 is free of air pressure stress and only is subjected to the elastic force of the elastic piece 32, the air passage cannot be blocked, the negative pressure of the adsorption hole 12 is stably maintained, and the function of adsorbing the workpiece is achieved.
Referring to fig. 9, a block-free suction cup according to a second embodiment of the present invention is shown, in which the structure of the block-free suction cup is substantially the same as that of the first embodiment, except that: each of the mounting holes 11 communicates with a plurality of suction holes 12. The number of the adsorption holes 12 is increased without changing the number of the mounting holes 11.
Referring to fig. 10, a third embodiment of the block-free suction cup of the present invention is shown, in which the structure of the block-free suction cup is substantially the same as that of the first embodiment, except that: the thick bottom of the panel 10 is reduced, the adsorption hole 12 is reserved, and the design of the mounting hole 11 is cancelled. The plug assembly 30 is directly mounted to the base plate 20, and the base plate 20 is adapted according to the plug assembly 30, for example, by increasing the height of the base plate 20 and providing a hole for mounting the plug assembly 30. And the hole in which the plug assembly 30 is installed communicates with the longitudinal vent grooves 21 and the lateral vent grooves 22.
Referring to fig. 11, a fourth embodiment of the block-free suction cup of the present invention is shown, in which the structure of the block-free suction cup is substantially the same as that of the first embodiment, and the difference is: the thick bottom of the panel 10 is reduced, the adsorption hole 12 is reserved, and the design of the mounting hole 11 is cancelled. The plug assembly 30 is added with a mounting plate 34, the mounting plate 34 is positioned between the panel 10 and the bottom plate 20, and the valve seat 33 is mounted on the mounting plate 34.
Referring to fig. 12, a fifth embodiment of the block-free suction cup of the present invention is shown, in which the structure of the block-free suction cup is substantially the same as that of the first embodiment, except that: the valve seat 33 retains the elastomeric chamber 331, the vent tail holes 332, and the plug chamber 330 is eliminated. The plug 31 is directly mounted on the upper portion of the mounting hole 11, and the valve seat 33 is mounted on and connected to the lower portion of the mounting hole 11. The upper portion of the mounting hole 11, the elastic member chamber 331, and the vent tail hole 332 together form an air passage.
Referring to fig. 13, a sixth embodiment of the block-free suction cup of the present invention is shown, in which the structure of the block-free suction cup is substantially the same as that of the first embodiment, except that: the thick bottom of the panel 10 is reduced, the adsorption hole 12 is reserved, and the design of the mounting hole 11 is cancelled. The plug assembly 30 eliminates the valve seat 33 and adds the mounting plate 34, the mounting plate 34 being located between the panel 10 and the base plate 20. The plug chamber 330, the elastic member chamber 331 and the vent tail hole 332 are disposed on the mounting plate 34.
Referring to fig. 14, a seventh embodiment of the block-free sucker is shown, in which the structure of the block-free sucker is substantially the same as that of the first embodiment, except that: the thick bottom of the panel 10 is reduced, the adsorption hole 12 is reserved, and the design of the mounting hole 11 is cancelled. The plug assembly 30 adds a mounting plate 34, the mounting plate 34 being located between the panel 10 and the base plate 20. The mounting plate 34 is provided with mounting holes 11. The valve seat 33 retains the elastomeric chamber 331, the vent tail holes 332, and the plug chamber 330 is eliminated. The plug 31 is directly mounted on the upper portion of the mounting hole 11, and the valve seat 33 is mounted on and connected to the lower portion of the mounting hole 11. The upper portion of the mounting hole 11, the elastic member chamber 331, and the vent tail hole 332 together form an air passage.
Referring to fig. 15, an eighth embodiment of the block-free sucker is shown, in which the structure of the block-free sucker is substantially the same as that of the first embodiment, except that: the bottom plate 20 eliminates the design of the longitudinal vent grooves 21 and the transverse vent grooves 22, and the bottom plate 20 is directly provided with a cavity 24, and the cavity 24 is communicated with the air suction opening 23. (the air extraction opening may be provided on the side portion)
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, variations and modifications can be made without departing from the spirit of the invention, and all equivalent modifications and changes can be made to the above embodiments according to the essential technology of the invention, which falls into the protection scope of the invention.
Claims (10)
1. The utility model provides a block-free sucking disc, includes panel and bottom plate, the panel is equipped with a plurality of absorption holes, its characterized in that: the blocking-free sucker further comprises a plug assembly, the plug assembly comprises a plug and an elastic piece, the blocking-free sucker is provided with a plurality of air passages, each air passage is communicated with one or more adsorption holes, the plug and the elastic piece are located in the air passages, the plug is located on the elastic piece, the air passages are exhausted, when the adsorption holes are not covered by a workpiece, negative pressure is formed below the plug, normal atmospheric pressure above the plug enables the plug to be pressed downwards to seal the air passages, and the adsorption holes which are not covered by the workpiece are sealed; when the adsorption holes are covered by the workpiece, negative pressure is formed below the plugs, negative pressure is formed between the plugs and the workpiece, the plugs are free of air pressure stress, the air passages are opened by the elasticity of the elastic pieces, and the adsorption holes keep negative pressure to adsorb the workpiece.
2. The jam-free suction cup of claim 1 wherein: the plug assembly further comprises a valve seat, the valve seat is provided with an elastic piece chamber and a ventilation tail hole, the elastic piece chamber is communicated with the ventilation tail hole, and the elastic piece is installed in the elastic piece chamber.
3. The jam-free suction cup of claim 2 wherein: the valve seat is further provided with a plug chamber, the plug is located in the plug chamber, the plug chamber is communicated with the elastic piece chamber, the plug chamber, the elastic piece chamber and the ventilation tail hole jointly form the air passage, a plugging step is formed between the plug chamber and the elastic piece chamber, and the plug and the plugging step are abutted to enable the air passage to be closed.
4. The jam-free suction cup of claim 3 wherein: the panel is provided with a mounting hole, and the valve seat is mounted in the mounting hole.
5. The jam-free suction cup of claim 3 wherein: the valve seat is mounted in the base plate.
6. The jam-free suction cup of claim 3 wherein: the plug assembly further comprises a mounting plate, the valve seats are mounted on the mounting plate, and the mounting plate is located between the panel and the bottom plate.
7. The jam-free suction cup of claim 2 wherein: the panel is provided with a mounting hole, the valve seat is mounted on the lower portion of the mounting hole, the plug is located on the upper portion of the mounting hole, the elastic piece chamber and the ventilation tail hole jointly form the air passage, a plugging step is formed between the upper portion of the mounting hole and the elastic piece chamber, and the plug abuts against the plugging step to enable the air passage to be closed.
8. The jam-free suction cup of claim 2 wherein: the end cap subassembly still includes the mounting panel, the mounting panel is located the panel with between the bottom plate, the mounting panel is equipped with the mounting hole, and is a plurality of the disk seat install in the mounting hole lower part, the end cap is located mounting hole upper portion, mounting hole upper portion the elastic component room reaches the tail hole of ventilating forms above-mentioned air flue jointly, mounting hole upper portion with form the shutoff step between the elastic component room, the end cap with the conflict of shutoff step makes the air flue seals.
9. The jam-free suction cup of claim 1 wherein: the end cap subassembly still includes the mounting panel, the mounting panel is located the panel with between the bottom plate, the mounting panel is equipped with end cap room, elastic component room and the tail hole of ventilating, the end cap is located in the end cap room, the elastic component install in the elastic component room, the end cap room the elastic component room reaches the tail hole of ventilating forms above-mentioned air flue jointly, the end cap room with form the shutoff step between the elastic component room, the end cap with the messenger is contradicted to the shutoff step the air flue is sealed.
10. The jam-free suction cup of claim 1 wherein: the bottom plate is provided with an air suction opening, and the air suction opening is communicated with the air passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010456221.5A CN111620107A (en) | 2020-05-26 | 2020-05-26 | Blocking-free sucker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010456221.5A CN111620107A (en) | 2020-05-26 | 2020-05-26 | Blocking-free sucker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111620107A true CN111620107A (en) | 2020-09-04 |
Family
ID=72256264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010456221.5A Pending CN111620107A (en) | 2020-05-26 | 2020-05-26 | Blocking-free sucker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111620107A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050040577A1 (en) * | 2003-08-19 | 2005-02-24 | Usun Technology Co., Ltd. | Method writing data to a large block of a flash memory cell |
| CN208348270U (en) * | 2018-05-31 | 2019-01-08 | 深圳市道元实业有限公司 | Vacuum absorption device |
| JP2019193958A (en) * | 2018-05-01 | 2019-11-07 | 株式会社ミツトヨ | Vacuum chuck and auto-valve for vacuum chuck |
| CN212608059U (en) * | 2020-05-26 | 2021-02-26 | 佛山市银美精工科技有限公司 | Blocking-free sucker |
-
2020
- 2020-05-26 CN CN202010456221.5A patent/CN111620107A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050040577A1 (en) * | 2003-08-19 | 2005-02-24 | Usun Technology Co., Ltd. | Method writing data to a large block of a flash memory cell |
| JP2019193958A (en) * | 2018-05-01 | 2019-11-07 | 株式会社ミツトヨ | Vacuum chuck and auto-valve for vacuum chuck |
| CN208348270U (en) * | 2018-05-31 | 2019-01-08 | 深圳市道元实业有限公司 | Vacuum absorption device |
| CN212608059U (en) * | 2020-05-26 | 2021-02-26 | 佛山市银美精工科技有限公司 | Blocking-free sucker |
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