CN111002159A - Fixing device - Google Patents

Fixing device Download PDF

Info

Publication number
CN111002159A
CN111002159A CN201911045932.7A CN201911045932A CN111002159A CN 111002159 A CN111002159 A CN 111002159A CN 201911045932 A CN201911045932 A CN 201911045932A CN 111002159 A CN111002159 A CN 111002159A
Authority
CN
China
Prior art keywords
fixing seat
block
rotating
fixing
connecting block
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.)
Granted
Application number
CN201911045932.7A
Other languages
Chinese (zh)
Other versions
CN111002159B (en
Inventor
杨军成
况鑫
欧阳英
代万龙
陈晴
徐楠
曹辉钢
吴佳宇
王伊芳
朱厚霖
陈少波
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.)
Fulian Yuzhan Technology Shenzhen Co Ltd
Original Assignee
Shenzhen Futaihong Precision Industry 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 Shenzhen Futaihong Precision Industry Co Ltd filed Critical Shenzhen Futaihong Precision Industry Co Ltd
Priority to CN201911045932.7A priority Critical patent/CN111002159B/en
Publication of CN111002159A publication Critical patent/CN111002159A/en
Application granted granted Critical
Publication of CN111002159B publication Critical patent/CN111002159B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B29/00Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00Component parts such as frames, beds, carriages, headstocks
    • B24B41/06Work supports, e.g. adjustable steadies

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)

Abstract

A fixing device comprises a first fixing seat, a second fixing seat and a connecting mechanism, wherein the first fixing seat and the second fixing seat are used for clamping workpieces, and the connecting mechanism is used for locking the first fixing seat and the second fixing seat. The fixing device is simple in structure and convenient to operate.

Description

Fixing device
Technical Field
The invention relates to the field of machining, in particular to a fixing device.
Background
In the production process, a fixing device is usually required to clamp a workpiece so as to facilitate processes of grinding, polishing and the like. The existing fixing device is generally complex in structure and complex in operation, for example, a driving member such as an air cylinder is required to drive and clamp a workpiece, or a screw is required to be rotated for locking.
Disclosure of Invention
In view of the above, it is desirable to provide a fixing device with simple structure and convenient operation.
A fixing device comprises a first fixing seat, a second fixing seat and a connecting mechanism, wherein the first fixing seat and the second fixing seat are used for clamping workpieces, and the connecting mechanism is used for locking the first fixing seat and the second fixing seat.
Further, coupling mechanism includes rotating member, connecting block and trip, the trip is located on the first fixing base, the rotating member rotationally locates on the second fixing base, locating connecting block slidable on the second fixing base and with the rotating member is connected, the rotating member is used for driving the connecting block slides, the connecting block is used for stretching into in the trip in order to lock first fixing base and second fixing base.
Furthermore, the connecting mechanism further comprises a first elastic piece, two ends of the first elastic piece respectively abut against the connecting block and the second fixing seat so that the connecting block extends into the clamping hook to lock the first fixing seat and the second fixing seat, and the rotating piece rotates to drive the connecting block to slide away from the clamping hook so that the first fixing seat is separated from the second fixing seat.
Furthermore, the second fixing seat comprises a body, a pressing rod and a second elastic piece, and two ends of the second elastic piece respectively press the body and the pressing rod, so that the pressing rod presses the workpiece.
Further, the rotating part includes pivot, rotatory piece and actuating lever, the pivot is rotationally worn to locate the second fixing base, rotatory piece with the actuating lever is connected respectively the both ends of pivot, rotatory piece is connected the connecting block, the actuating lever is used for the drive the pivot is rotated, the pivot is used for the drive rotatory piece rotates, rotatory piece is used for the drive the connecting block slides.
Further, the rotating block comprises a plurality of first positioning holes, the connecting block comprises a plurality of second positioning holes, and the rotating block is connected with one of the second positioning holes of the connecting block through one of the first positioning holes.
Further, the rotating block comprises a main body part and a protruding part, the main body part is circular, the protruding part is located on the outer peripheral face of the main body part, the main body part is connected with the rotating shaft, the protruding part is connected with the connecting block, and the first positioning holes are formed in the protruding part in a plurality.
Further, the rotating shaft comprises a limiting block, the main body part comprises a plurality of limiting holes, and the rotating shaft is connected with one or more limiting holes of the main body part through the limiting block.
Further, the second fixing seat further comprises a handle, and the handle is used for stopping the driving rod to limit the rotation angle of the rotating block.
Further, the first fixing seat comprises a positioning plate, a sheath and a mounting plate, the positioning plate is used for supporting and positioning the workpiece, the sheath is used for shielding a partial area of the workpiece, and the mounting plate is used for connecting a manipulator.
The fixing device locks or releases the first fixing seat and the second fixing seat through the connecting mechanism. The fixing device is simple in structure and convenient to operate.
Drawings
Fig. 1 is a perspective view illustrating a fixing apparatus for clamping a workpiece according to an embodiment of the present invention.
Fig. 2 is a perspective view of the fixing device shown in fig. 1 with the first fixing base and the second fixing base separated from each other.
Fig. 3 is a schematic perspective view of another angle of the fixture shown in fig. 2.
Fig. 4 is a partially exploded perspective view of the fastening device of fig. 1.
Fig. 5 is a partially exploded isometric view of another angle of the fixture of fig. 4.
Fig. 6 is a partially exploded perspective view of a portion of the components of the fixture of fig. 1.
Description of the main elements
Fastening device 100
Workpiece 200
First fixing seat 10
Positioning plate 11
Sheath 13
Positioning rod 15
Mounting plate 17
Second fixed seat 30
Body 31
Chute 310
Pressure plate 33
Dodging hole 330
Cover body 35
Pressing rod 37
Handle 39
Connecting mechanism 50
Rotating member 51
Rotating shaft 512
Limiting block 5121
Rotating block 514
First positioning hole 5140
Main body 5141
Limiting hole 5104
Projecting part 5143
Drive rod 516
Connecting block 53
Second positioning hole 530
Hook 55
Card slot 550
First elastic member 57
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
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.
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.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Referring to fig. 1, a fixing device 100 according to a preferred embodiment of the present invention is used for clamping a workpiece 200. In the illustrated embodiment, the workpiece 200 is a cell phone bezel, but is not so limited.
Referring to fig. 2, 5 and 6, the fixing device 100 includes a first fixing base 10, a second fixing base 30 and a connecting mechanism 50. The first fixing seat 10 and the second fixing seat 30 are used for clamping a workpiece 200. The connecting mechanism 50 is used for locking the first fixing seat 10 and the second fixing seat 30.
Referring to fig. 2, 5 and 6, the connecting mechanism 50 includes a rotating member 51, a connecting block 53 and a hook 55. The hook 55 is disposed on the first fixing base 10. The rotating member 51 is rotatably disposed on the second fixing base 30. The connecting block 53 is slidably disposed on the second fixing base 30 and connected to the rotating member 51. The rotating member 51 is used for driving the connecting block 53 to slide. The connecting block 53 is used for extending into the hook 55 to lock the first fixing seat 10 and the second fixing seat 30.
The hook 55 is provided with a locking groove 550 to receive one end of the connection block 53.
In the illustrated embodiment, the number of the hooks 55 and the number of the connection blocks 53 are two, but the invention is not limited thereto, and in other embodiments, the number of the hooks 55 and the number of the connection blocks 53 may be one or more as needed.
Referring to fig. 6, in the illustrated embodiment, the connecting mechanism 50 further includes a first elastic member 57. The two ends of the first elastic member 57 respectively press against the connecting block 53 and the second fixing seat 30, so that the connecting block 53 extends into the hook 55 to lock the first fixing seat 10 and the second fixing seat 30. The rotating member 51 rotates to drive the connecting block 53 to slide away from the hook 55, so that the first fixing seat 10 is separated from the second fixing seat 30.
Referring to fig. 3 and 5, in the illustrated embodiment, the second fixing base 30 includes a body 31, a pressing rod 37 and a second elastic member (not shown). Two ends of the second elastic member respectively press against the body 31 and the pressing rod 37, so that the pressing rod 37 presses against the workpiece 200.
When the second fixing seat 30 is covered on the first fixing seat 10, the pressing rod 37 presses the workpiece 200 in advance for positioning; when the second fixing seat 30 is removed, the pressing rod 37 can still press the workpiece 200 before the second fixing seat 30 is completely separated from the workpiece 200, so as to prevent the workpiece 200 from being taken out.
In the illustrated embodiment, the body 31 is provided with a slide groove 310 to slidably receive the connecting block 53.
Referring to fig. 3 and 5, in the illustrated embodiment, the second fixing base 30 further includes a pressing plate 33. The pressing plate 33 is detachably disposed on the body 31. The pressing plate 33 is used for pressing the workpiece 200. The pressing plate 33 is provided with an escape hole 330 to escape the hook 55. When the second fixing seat 30 is covered on the first fixing seat 10, the hook 55 passes through the avoiding hole 330.
In the illustrated embodiment, the second fixing base 30 further includes a sleeve 35. The sleeve 35 is sleeved on the body 31 and used for shielding a partial area of the workpiece 200.
Referring to fig. 5 and 6, in the illustrated embodiment, the rotating member 51 includes a rotating shaft 512, a rotating block 514 and a driving rod 516. The rotating shaft 512 is rotatably disposed through the second fixing base 30. The rotating block 514 and the driving rod 516 are respectively connected to two ends of the rotating shaft 512. The rotation block 514 is connected to the connection block 53. The driving rod 516 is used for driving the rotating shaft 512 to rotate. The rotating shaft 512 is used for driving the rotating block 514 to rotate. The rotating block 514 is used for driving the connecting block 53 to slide.
In the illustrated embodiment, the rotation block 514 includes a plurality of first positioning holes 5140. The connecting block 53 includes a plurality of second positioning holes 530. The rotation block 514 is connected to one of the second positioning holes 530 of the connection block 53 through one of the first positioning holes 5140.
The protruding distance of the connecting block 53 can be adjusted to fit different workpieces 200 by aligning and connecting different first positioning holes 5140 and second positioning holes 530, without remanufacturing the parts.
In the illustrated embodiment, the rotation block 514 includes a body 5141 and a protrusion 5143. The body portion 5141 has a circular shape. The protrusion 5143 is located on the outer circumferential surface of the body 5141. The body portion 5141 is connected to the rotating shaft 512. The protrusion 5143 is connected to the connection block 53. A plurality of the first positioning holes 5140 is provided on the protrusion 5143.
In the illustrated embodiment, the shaft 512 includes a stop block 5121. The body portion 5141 includes a plurality of limiting holes 5104. The rotating shaft 512 is connected with one or more of the limiting holes 5104 of the main body 5141 through the limiting block 5121.
By aligning the different limiting holes 5104 with the limiting blocks 5121, the angle of the protrusion 5143 can be adjusted to fit the connection block 53.
In the illustrated embodiment, the second holder 30 further includes a handle 39. The handle 39 is used for stopping the driving rod 516 to limit the rotation angle of the rotation block 514.
Referring to fig. 2 and 4, in the illustrated embodiment, the first fixing seat 10 includes a positioning plate 11, a sheath 13 and a mounting plate 17. The positioning plate 11 is used for supporting and positioning the workpiece 200. The sheath 13 is used to shield a partial region of the workpiece 200. The mounting plate 17 is used for attachment of a robot (not shown).
In the illustrated embodiment, the first fixing seat 10 further includes a positioning rod 15. The positioning rod 15 is disposed on the positioning plate 11 and used for positioning the workpiece 200.
The fixture 100, in use: the workpiece 200 is placed on the first holder 10. Then, the rotary member 51 is rotated to contract the connection block 53. Then, the second fixing seat 30 is placed on the workpiece 200, the rotating member 51 is released, and the first elastic member 57 drives the connecting block 53 to extend into the slot 550 for fixing. After the machining is completed, the rotating member 51 is rotated to contract the connecting block 53, and the second fixing seat 30 and the workpiece 200 are taken out.
The fixing device 100 locks or releases the first holder 10 and the second holder 30 through the connection mechanism 50. The fixing device 100 has a simple structure and is convenient to operate.
Further, when the fixing device 100 is used for clamping workpieces with different specifications, only the positioning plate 11, the sheath 13, the pressing plate 33, the sleeve body 35 and other elements need to be replaced; the protruding distance of the connecting block 53 can be adjusted to fit different workpieces 200 by aligning and connecting different first positioning holes 5140 and second positioning holes 530, without remanufacturing the parts.
Although the present invention has been described with reference to the above preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A fixing device comprises a first fixing seat, a second fixing seat and a connecting mechanism, wherein the first fixing seat and the second fixing seat are used for clamping workpieces, and the connecting mechanism is used for locking the first fixing seat and the second fixing seat.
2. The fixing device according to claim 1, wherein the connecting mechanism includes a rotating member, a connecting block and a hook, the hook is disposed on the first fixing seat, the rotating member is rotatably disposed on the second fixing seat, the connecting block is slidably disposed on the second fixing seat and connected to the rotating member, the rotating member is configured to drive the connecting block to slide, and the connecting block is configured to extend into the hook to lock the first fixing seat and the second fixing seat.
3. The fixing device according to claim 2, wherein the connecting mechanism further includes a first elastic member, two ends of the first elastic member respectively press against the connecting block and the second fixing seat to make the connecting block extend into the hook so as to lock the first fixing seat and the second fixing seat, and the rotating member rotates to drive the connecting block to slide away from the hook so as to separate the first fixing seat from the second fixing seat.
4. The fixing device according to any one of claims 1 to 3, wherein the second fixing seat includes a body, a pressing rod and a second elastic member, and two ends of the second elastic member respectively press against the body and the pressing rod, so that the pressing rod presses against the workpiece.
5. The fixing device according to claim 2 or 3, wherein the rotating member includes a rotating shaft, a rotating block and a driving rod, the rotating shaft is rotatably disposed through the second fixing base, the rotating block and the driving rod are respectively connected to two ends of the rotating shaft, the rotating block is connected to the connecting block, the driving rod is configured to drive the rotating shaft to rotate, the rotating shaft is configured to drive the rotating block to rotate, and the rotating block is configured to drive the connecting block to slide.
6. The fixture of claim 5, the rotation block including a plurality of first alignment holes, the attachment block including a plurality of second alignment holes, the rotation block connecting one of the plurality of second alignment holes of the attachment block through one of the plurality of first alignment holes.
7. The fixing device according to claim 6, wherein the rotating block includes a circular main body and a protrusion, the protrusion is located on the outer peripheral surface of the main body, the main body is connected to the rotating shaft, the protrusion is connected to the connecting block, and the first positioning holes are formed in the protrusion.
8. The fixing device as claimed in claim 7, wherein the shaft includes a stopper, the main body includes a plurality of stopper holes, and the shaft is connected to one or more of the plurality of stopper holes of the main body through the stopper.
9. The fixing device of claim 5, wherein the second fixing seat further comprises a handle for stopping the driving rod to limit the rotation angle of the rotation block.
10. The fixing device of claim 1, wherein the first fixing seat comprises a positioning plate, a sheath and a mounting plate, the positioning plate is used for supporting and positioning the workpiece, the sheath is used for shielding a partial area of the workpiece, and the mounting plate is used for connecting a manipulator.
CN201911045932.7A 2019-10-30 2019-10-30 Fixing device Active CN111002159B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911045932.7A CN111002159B (en) 2019-10-30 2019-10-30 Fixing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911045932.7A CN111002159B (en) 2019-10-30 2019-10-30 Fixing device

Publications (2)

Publication Number Publication Date
CN111002159A true CN111002159A (en) 2020-04-14
CN111002159B CN111002159B (en) 2021-10-19

Family

ID=70111067

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911045932.7A Active CN111002159B (en) 2019-10-30 2019-10-30 Fixing device

Country Status (1)

Country Link
CN (1) CN111002159B (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08126949A (en) * 1994-10-31 1996-05-21 Nishi Nippon Valve Koji:Kk Valve seat fitting device
CN103659311A (en) * 2012-09-14 2014-03-26 深圳富泰宏精密工业有限公司 Fixing assembly
CN205703606U (en) * 2016-04-01 2016-11-23 深圳鸿益进智能科技股份有限公司 Mobile intelligent terminal automatic wiredrawing device
CN206493137U (en) * 2016-08-24 2017-09-15 兴科电子科技有限公司 A kind of pneumatic type locks tool
CN207309715U (en) * 2017-08-21 2018-05-04 深圳市水佳鑫科技有限公司 Fixture
CN207387158U (en) * 2017-10-30 2018-05-22 商丘金振源电子科技有限公司 A kind of plastic cellphone frame gauge
CN208246438U (en) * 2018-05-15 2018-12-18 新昌县城南乡量创机械厂 A kind of bearing grinding device
CN208929784U (en) * 2018-10-30 2019-06-04 商丘金振源电子科技有限公司 A kind of electromagnet pressing jig
CN209140625U (en) * 2018-09-20 2019-07-23 惠州阿瑞斯智能装备有限公司 Mobile phone center polishing clamp and its milling drum

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08126949A (en) * 1994-10-31 1996-05-21 Nishi Nippon Valve Koji:Kk Valve seat fitting device
CN103659311A (en) * 2012-09-14 2014-03-26 深圳富泰宏精密工业有限公司 Fixing assembly
CN205703606U (en) * 2016-04-01 2016-11-23 深圳鸿益进智能科技股份有限公司 Mobile intelligent terminal automatic wiredrawing device
CN206493137U (en) * 2016-08-24 2017-09-15 兴科电子科技有限公司 A kind of pneumatic type locks tool
CN207309715U (en) * 2017-08-21 2018-05-04 深圳市水佳鑫科技有限公司 Fixture
CN207387158U (en) * 2017-10-30 2018-05-22 商丘金振源电子科技有限公司 A kind of plastic cellphone frame gauge
CN208246438U (en) * 2018-05-15 2018-12-18 新昌县城南乡量创机械厂 A kind of bearing grinding device
CN209140625U (en) * 2018-09-20 2019-07-23 惠州阿瑞斯智能装备有限公司 Mobile phone center polishing clamp and its milling drum
CN208929784U (en) * 2018-10-30 2019-06-04 商丘金振源电子科技有限公司 A kind of electromagnet pressing jig

Also Published As

Publication number Publication date
CN111002159B (en) 2021-10-19

Similar Documents

Publication Publication Date Title
JP6287205B2 (en) Power working machine
TWI408039B (en) Blade exchange tool
CN111002159B (en) Fixing device
US8727838B2 (en) Auxiliary sander attachment for portable sander
JP2012218091A (en) Grinding device
CN102259312A (en) Positioning device
JP5265961B2 (en) Blade attachment / detachment assist device
CN104588947A (en) Double-layer soft belt weld clamp and process thereof
KR102276986B1 (en) Grinder holder that polishing pad can be attached or detached by one-action
JP2009269131A (en) Blade attaching and detaching auxiliary device
ITMI982726A1 (en) DEVICE FOR REMOVABLE LOCKING OF ABRASIVE DISCS GRINDING MACHINES OR GRINDERS
WO2004080646A2 (en) Clamp system
CN209223821U (en) Spectrum sample grinding machine and its sample holding device
EP3711902B1 (en) Sanding pad and sanding machine comprising said sanding pad
CN211916512U (en) Magnetic suction clamp for polishing
JP6769679B2 (en) Cutting equipment
CN204954078U (en) Tooth equipment is attacked to station dial precision
KR101868826B1 (en) Grinding Wheel Grinding Flange Holder
US10953529B2 (en) Portable milling machine having a spanner
CN214704397U (en) Programmable logic controller and sliding sheet device
CN213889576U (en) Grind groove anchor clamps
CN208451093U (en) Clamping device
CN105817778A (en) Novel rapid fastening mechanism capable of achieving clamping and expanding in two directions
CN112338584B (en) Clamping device
CN211102818U (en) Workpiece fast-assembling clamp for machine tool

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
TA01 Transfer of patent application right
TA01 Transfer of patent application right

Effective date of registration: 20210430

Address after: 518109 Guangzhou Guanlan Foxconn Hongguan Science Park B workshop 5 C09 buildings 4 floors, C07 buildings 2 floors, C08 buildings 3 floors 4 floors, C04 buildings 1 floors

Applicant after: SHENZHENSHI YUZHAN PRECISION TECHNOLOGY Co.,Ltd.

Address before: 518109 2 / F, building 3, workshop, area K1, Foxconn science and Technology Park, No.2, Donghuan 2nd Road, Longhua office, Longhua New District, Shenzhen City, Guangdong Province

Applicant before: Shenzhen Futaihong Precision Industry Co.,Ltd.

GR01 Patent grant
GR01 Patent grant
CP03 Change of name, title or address
CP03 Change of name, title or address

Address after: 518109 Foxconn H5 plant 101, No. 2, Donghuan 2nd Road, Fukang community, Longhua street, Longhua District, Shenzhen, Guangdong Province; plant 5, building C09, 4th floor, building C07, 2nd floor, building C08, 3rd floor, 4th floor, building C04, zone B, Foxconn Hongguan science and Technology Park, Fucheng Dasan community, Guanlan street, Guangdong Province

Patentee after: Fulian Yuzhan Technology (Shenzhen) Co.,Ltd.

Address before: 518109 Guangzhou Guanlan Foxconn Hongguan Science Park B workshop 5 C09 buildings 4 floors, C07 buildings 2 floors, C08 buildings 3 floors 4 floors, C04 buildings 1 floors

Patentee before: SHENZHENSHI YUZHAN PRECISION TECHNOLOGY Co.,Ltd.